/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* UDAPL kernel agent
*/
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/debug.h>
#include <sys/stropts.h>
#include <sys/stream.h>
#include <sys/strlog.h>
#include <sys/cmn_err.h>
#include <sys/kmem.h>
#include <sys/conf.h>
#include <sys/stat.h>
#include <sys/modctl.h>
#include <sys/kstat.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/strsun.h>
#include <sys/taskq.h>
#include <sys/open.h>
#include <sys/uio.h>
#include <sys/cpuvar.h>
#include <sys/atomic.h>
#include <sys/sysmacros.h>
#include <sys/esunddi.h>
#include <sys/avl.h>
#include <sys/cred.h>
#include <sys/note.h>
#include <sys/ib/ibtl/ibti.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <daplt_if.h>
#include <daplt.h>
/*
* The following variables support the debug log buffer scheme.
*/
#ifdef DEBUG
static char daplka_dbgbuf[0x80000];
#else /* DEBUG */
static char daplka_dbgbuf[0x4000];
#endif /* DEBUG */
static int daplka_dbgsize = sizeof (daplka_dbgbuf);
static size_t daplka_dbgnext;
static int daplka_dbginit = 0;
static kmutex_t daplka_dbglock;
_NOTE(MUTEX_PROTECTS_DATA(daplka_dbglock,
daplka_dbgbuf
daplka_dbgnext))
static int daplka_dbg = 0x0103;
static void daplka_console(const char *, ...);
static void daplka_debug(const char *, ...);
static int daplka_apm = 0x1; /* default enable */
static int daplka_failback = 0x1; /* default enable */
static int daplka_query_aft_setaltpath = 10;
#define DERR \
if (daplka_dbg & 0x100) \
daplka_debug
#ifdef DEBUG
#define DINFO \
daplka_console
#define D1 \
if (daplka_dbg & 0x01) \
daplka_debug
#define D2 \
if (daplka_dbg & 0x02) \
daplka_debug
#define D3 \
if (daplka_dbg & 0x04) \
daplka_debug
#define D4 \
if (daplka_dbg & 0x08) \
daplka_debug
#else /* DEBUG */
#define DINFO if (0) printf
#define D1 if (0) printf
#define D2 if (0) printf
#define D3 if (0) printf
#define D4 if (0) printf
#endif /* DEBUG */
/*
* driver entry points
*/
static int daplka_open(dev_t *, int, int, struct cred *);
static int daplka_close(dev_t, int, int, struct cred *);
static int daplka_attach(dev_info_t *, ddi_attach_cmd_t);
static int daplka_detach(dev_info_t *, ddi_detach_cmd_t);
static int daplka_info(dev_info_t *, ddi_info_cmd_t, void *, void **);
static int daplka_ioctl(dev_t, int, intptr_t, int, cred_t *, int *);
/*
* types of ioctls
*/
static int daplka_common_ioctl(int, minor_t, intptr_t, int, cred_t *, int *);
static int daplka_misc_ioctl(int, daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_ep_ioctl(int, daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_evd_ioctl(int, daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_mr_ioctl(int, daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_cno_ioctl(int, daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_pd_ioctl(int, daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_sp_ioctl(int, daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_srq_ioctl(int, daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
/*
* common ioctls and supporting functions
*/
static int daplka_ia_create(minor_t, intptr_t, int, cred_t *, int *);
static int daplka_ia_destroy(daplka_resource_t *);
/*
* EP ioctls and supporting functions
*/
static int daplka_ep_create(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_ep_modify(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_ep_free(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_ep_connect(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_ep_disconnect(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_ep_reinit(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_ep_destroy(daplka_resource_t *);
static void daplka_hash_ep_free(void *);
static int daplka_ep_failback(void *objp, void *arg);
static int daplka_ep_altpath(daplka_ep_resource_t *, ib_gid_t *);
static uint32_t daplka_ep_get_state(daplka_ep_resource_t *);
static void daplka_ep_set_state(daplka_ep_resource_t *, uint32_t, uint32_t);
static boolean_t daplka_ep_transition_is_valid(uint32_t, uint32_t);
static daplka_timer_info_t *daplka_timer_info_alloc(daplka_ep_resource_t *);
static void daplka_timer_info_free(daplka_timer_info_t *);
static void daplka_timer_handler(void *);
static void daplka_timer_dispatch(void *);
static void daplka_timer_thread(void *);
static int daplka_cancel_timer(daplka_ep_resource_t *);
static void daplka_hash_timer_free(void *);
/*
* EVD ioctls and supporting functions
*/
static int daplka_evd_create(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_cq_resize(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_evd_free(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_event_poll(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_evd_destroy(daplka_resource_t *);
static void daplka_cq_handler(ibt_cq_hdl_t, void *);
static void daplka_evd_wakeup(daplka_evd_resource_t *,
daplka_evd_event_list_t *, daplka_evd_event_t *);
static void daplka_evd_event_enqueue(daplka_evd_event_list_t *,
daplka_evd_event_t *);
static daplka_evd_event_t *daplka_evd_event_dequeue(daplka_evd_event_list_t *);
static void daplka_hash_evd_free(void *);
/*
* SRQ ioctls and supporting functions
*/
static int daplka_srq_create(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_srq_resize(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_srq_free(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_srq_destroy(daplka_resource_t *);
static void daplka_hash_srq_free(void *);
/*
* Miscellaneous ioctls
*/
static int daplka_cr_accept(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_cr_reject(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_cr_handoff(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_ia_query(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
/*
* PD ioctls and supporting functions
*/
static int daplka_pd_alloc(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_pd_free(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_pd_destroy(daplka_resource_t *);
static void daplka_hash_pd_free(void *);
/*
* SP ioctls and supporting functions
*/
static int daplka_service_register(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_service_deregister(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_sp_destroy(daplka_resource_t *);
static void daplka_hash_sp_free(void *);
static void daplka_hash_sp_unref(void *);
/*
* MR ioctls and supporting functions
*/
static int daplka_mr_register(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_mr_register_lmr(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_mr_register_shared(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_mr_deregister(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_mr_sync(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_mr_destroy(daplka_resource_t *);
static void daplka_hash_mr_free(void *);
static void daplka_shared_mr_free(daplka_mr_resource_t *);
/*
* MW ioctls and supporting functions
*/
static int daplka_mw_alloc(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_mw_free(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_mw_destroy(daplka_resource_t *);
static void daplka_hash_mw_free(void *);
/*
* CNO ioctls and supporting functions
*/
static int daplka_cno_alloc(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_cno_free(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_cno_wait(daplka_ia_resource_t *, intptr_t, int,
cred_t *, int *);
static int daplka_cno_destroy(daplka_resource_t *);
static void daplka_hash_cno_free(void *);
/*
* CM handlers
*/
static ibt_cm_status_t daplka_cm_rc_handler(void *, ibt_cm_event_t *,
ibt_cm_return_args_t *, void *, ibt_priv_data_len_t);
static ibt_cm_status_t daplka_cm_service_handler(void *, ibt_cm_event_t *,
ibt_cm_return_args_t *, void *, ibt_priv_data_len_t);
static ibt_cm_status_t daplka_cm_service_req(daplka_sp_resource_t *,
ibt_cm_event_t *, ibt_cm_return_args_t *, void *, ibt_priv_data_len_t);
/*
* resource management routines
*/
static int daplka_resource_reserve(minor_t *);
static int daplka_resource_insert(minor_t, daplka_resource_t *);
static daplka_resource_t *daplka_resource_remove(minor_t rnum);
static daplka_resource_t *daplka_resource_lookup(minor_t);
static void daplka_resource_init(void);
static void daplka_resource_fini(void);
static struct daplka_resource_table daplka_resource;
/*
* hash table routines
*/
static int daplka_hash_insert(daplka_hash_table_t *, uint64_t *, void *);
static int daplka_hash_remove(daplka_hash_table_t *, uint64_t, void **);
static void daplka_hash_walk(daplka_hash_table_t *, int (*)(void *, void *),
void *, krw_t);
static void *daplka_hash_lookup(daplka_hash_table_t *, uint64_t);
static int daplka_hash_create(daplka_hash_table_t *, uint_t,
void (*)(void *), void (*)(void *));
static void daplka_hash_destroy(daplka_hash_table_t *);
static uint32_t daplka_hash_getsize(daplka_hash_table_t *);
static void daplka_hash_generic_lookup(void *);
static uint32_t daplka_timer_hkey_gen();
/*
* async event handlers
*/
static void daplka_async_event_create(ibt_async_code_t, ibt_async_event_t *,
uint64_t, daplka_ia_resource_t *);
static void daplka_rc_async_handler(void *, ibt_hca_hdl_t, ibt_async_code_t,
ibt_async_event_t *);
static void daplka_cq_async_handler(void *, ibt_hca_hdl_t, ibt_async_code_t,
ibt_async_event_t *);
static void daplka_un_async_handler(void *, ibt_hca_hdl_t, ibt_async_code_t,
ibt_async_event_t *);
static void daplka_async_handler(void *, ibt_hca_hdl_t, ibt_async_code_t,
ibt_async_event_t *);
static void daplka_sm_notice_handler(void *, ib_gid_t, ibt_subnet_event_code_t,
ibt_subnet_event_t *event);
static void daplka_sm_gid_avail(ib_gid_t *, ib_gid_t *);
/*
* IBTF wrappers and default limits used for resource accounting
*/
static boolean_t daplka_accounting_enabled = B_TRUE;
static uint32_t daplka_max_qp_percent = 100;
static uint32_t daplka_max_cq_percent = 100;
static uint32_t daplka_max_pd_percent = 100;
static uint32_t daplka_max_mw_percent = 100;
static uint32_t daplka_max_mr_percent = 100;
static uint32_t daplka_max_srq_percent = 100;
static ibt_status_t
daplka_ibt_alloc_rc_channel(daplka_ep_resource_t *, ibt_hca_hdl_t,
ibt_chan_alloc_flags_t, ibt_rc_chan_alloc_args_t *,
ibt_channel_hdl_t *, ibt_chan_sizes_t *);
static ibt_status_t
daplka_ibt_free_channel(daplka_ep_resource_t *, ibt_channel_hdl_t);
static ibt_status_t
daplka_ibt_alloc_cq(daplka_evd_resource_t *, ibt_hca_hdl_t,
ibt_cq_attr_t *, ibt_cq_hdl_t *, uint_t *);
static ibt_status_t
daplka_ibt_free_cq(daplka_evd_resource_t *, ibt_cq_hdl_t);
static ibt_status_t
daplka_ibt_alloc_pd(daplka_pd_resource_t *, ibt_hca_hdl_t,
ibt_pd_flags_t, ibt_pd_hdl_t *);
static ibt_status_t
daplka_ibt_free_pd(daplka_pd_resource_t *, ibt_hca_hdl_t, ibt_pd_hdl_t);
static ibt_status_t
daplka_ibt_alloc_mw(daplka_mw_resource_t *, ibt_hca_hdl_t, ibt_pd_hdl_t,
ibt_mw_flags_t, ibt_mw_hdl_t *, ibt_rkey_t *);
static ibt_status_t
daplka_ibt_free_mw(daplka_mw_resource_t *, ibt_hca_hdl_t, ibt_mw_hdl_t);
static ibt_status_t
daplka_ibt_register_mr(daplka_mr_resource_t *, ibt_hca_hdl_t, ibt_pd_hdl_t,
ibt_mr_attr_t *, ibt_mr_hdl_t *, ibt_mr_desc_t *);
static ibt_status_t
daplka_ibt_register_shared_mr(daplka_mr_resource_t *, ibt_hca_hdl_t,
ibt_mr_hdl_t, ibt_pd_hdl_t, ibt_smr_attr_t *, ibt_mr_hdl_t *,
ibt_mr_desc_t *);
static ibt_status_t
daplka_ibt_deregister_mr(daplka_mr_resource_t *, ibt_hca_hdl_t, ibt_mr_hdl_t);
static ibt_status_t
daplka_ibt_alloc_srq(daplka_srq_resource_t *, ibt_hca_hdl_t, ibt_srq_flags_t,
ibt_pd_hdl_t, ibt_srq_sizes_t *, ibt_srq_hdl_t *, ibt_srq_sizes_t *);
static ibt_status_t
daplka_ibt_free_srq(daplka_srq_resource_t *, ibt_srq_hdl_t);
/*
* macros for manipulating resource objects.
* these macros can be used on objects that begin with a
* daplka_resource_t header.
*/
#define DAPLKA_RS_REFCNT(rp) ((rp)->header.rs_refcnt)
#define DAPLKA_RS_REF(rp) { \
mutex_enter(&(rp)->header.rs_reflock); \
(rp)->header.rs_refcnt++; \
ASSERT((rp)->header.rs_refcnt != 0); \
mutex_exit(&(rp)->header.rs_reflock); \
}
#define DAPLKA_RS_UNREF(rp) { \
mutex_enter(&(rp)->header.rs_reflock); \
ASSERT((rp)->header.rs_refcnt != 0); \
if (--(rp)->header.rs_refcnt == 0) { \
ASSERT((rp)->header.rs_free != NULL); \
mutex_exit(&(rp)->header.rs_reflock); \
(rp)->header.rs_free((daplka_resource_t *)rp); \
} else { \
mutex_exit(&(rp)->header.rs_reflock); \
} \
}
#define DAPLKA_RS_INIT(rp, type, rnum, free_func) { \
(rp)->header.rs_refcnt = 1; \
(rp)->header.rs_type = (type); \
(rp)->header.rs_rnum = (rnum); \
(rp)->header.rs_charged = 0; \
(rp)->header.rs_free = (free_func); \
mutex_init(&(rp)->header.rs_reflock, NULL, \
MUTEX_DRIVER, NULL); \
}
#define DAPLKA_RS_FINI(rp) { \
mutex_destroy(&(rp)->header.rs_reflock); \
}
#define DAPLKA_RS_ACCT_INC(rp, cnt) { \
atomic_add_32(&(rp)->header.rs_charged, (cnt)); \
}
#define DAPLKA_RS_ACCT_DEC(rp, cnt) { \
atomic_add_32(&(rp)->header.rs_charged, -(cnt)); \
}
#define DAPLKA_RS_ACCT_CHARGED(rp) ((rp)->header.rs_charged)
#define DAPLKA_RS_RNUM(rp) ((rp)->header.rs_rnum)
#define DAPLKA_RS_TYPE(rp) ((rp)->header.rs_type)
#define DAPLKA_RS_RESERVED(rp) ((intptr_t)(rp) == DAPLKA_RC_RESERVED)
/*
* depending on the timeout value does a cv_wait_sig or cv_timedwait_sig
*/
#define DAPLKA_EVD_WAIT(cvp, mp, timeout) \
((timeout) == LONG_MAX) ? cv_wait_sig((cvp), (mp)) : \
cv_timedwait_sig((cvp), (mp), (timeout))
#define DAPLKA_HOLD_HCA_WITHOUT_LOCK(hca) ((hca)->hca_ref_cnt++)
#define DAPLKA_RELE_HCA_WITHOUT_LOCK(hca) ((hca)->hca_ref_cnt--)
#define DAPLKA_HOLD_HCA(dp, hca) { \
mutex_enter(&(dp)->daplka_mutex); \
DAPLKA_HOLD_HCA_WITHOUT_LOCK(hca); \
mutex_exit(&(dp)->daplka_mutex); \
}
#define DAPLKA_RELE_HCA(dp, hca) { \
mutex_enter(&(dp)->daplka_mutex); \
DAPLKA_RELE_HCA_WITHOUT_LOCK(hca); \
mutex_exit(&(dp)->daplka_mutex); \
}
#define DAPLKA_HCA_BUSY(hca) \
((hca)->hca_ref_cnt != 0 || \
(hca)->hca_qp_count != 0 || \
(hca)->hca_cq_count != 0 || \
(hca)->hca_pd_count != 0 || \
(hca)->hca_mw_count != 0 || \
(hca)->hca_mr_count != 0)
static struct cb_ops daplka_cb_ops = {
daplka_open, /* cb_open */
daplka_close, /* cb_close */
nodev, /* cb_strategy */
nodev, /* cb_print */
nodev, /* cb_dump */
nodev, /* cb_read */
nodev, /* cb_write */
daplka_ioctl, /* cb_ioctl */
nodev, /* cb_devmap */
nodev, /* cb_mmap */
nodev, /* cb_segmap */
nochpoll, /* cb_chpoll */
ddi_prop_op, /* cb_prop_op */
NULL, /* cb_stream */
D_NEW | D_MP, /* cb_flag */
CB_REV, /* rev */
nodev, /* int (*cb_aread)() */
nodev /* int (*cb_awrite)() */
};
static struct dev_ops daplka_ops = {
DEVO_REV, /* devo_rev */
0, /* devo_refcnt */
daplka_info, /* devo_getinfo */
nulldev, /* devo_identify */
nulldev, /* devo_probe */
daplka_attach, /* devo_attach */
daplka_detach, /* devo_detach */
nodev, /* devo_reset */
&daplka_cb_ops, /* devo_cb_ops */
(struct bus_ops *)NULL, /* devo_bus_ops */
nulldev, /* power */
ddi_quiesce_not_needed, /* devo_quiesce */
};
/*
* Module linkage information for the kernel.
*/
static struct modldrv modldrv = {
&mod_driverops,
"uDAPL Service Driver",
&daplka_ops,
};
static struct modlinkage modlinkage = {
#ifdef _LP64
MODREV_1, { (void *) &modldrv, NULL, NULL, NULL, NULL, NULL, NULL }
#else
MODREV_1, { (void *) &modldrv, NULL, NULL, NULL }
#endif
};
/*
* daplka_dev holds global driver state and a list of HCAs
*/
static daplka_t *daplka_dev = NULL;
static void *daplka_state = NULL;
/*
* global SP hash table
*/
static daplka_hash_table_t daplka_global_sp_htbl;
/*
* timer_info hash table
*/
static daplka_hash_table_t daplka_timer_info_htbl;
static uint32_t daplka_timer_hkey = 0;
/*
* shared MR avl tree
*/
static avl_tree_t daplka_shared_mr_tree;
static kmutex_t daplka_shared_mr_lock;
static int daplka_shared_mr_cmp(const void *, const void *);
_NOTE(MUTEX_PROTECTS_DATA(daplka_shared_mr_lock,
daplka_shared_mr_tree))
/*
* default kmem flags used by this driver
*/
static int daplka_km_flags = KM_SLEEP;
/*
* taskq used for handling background tasks
*/
static taskq_t *daplka_taskq = NULL;
/*
* daplka_cm_delay is the length of time the active
* side needs to wait before timing out on the REP message.
*/
static clock_t daplka_cm_delay = 60000000;
/*
* modunload will fail if pending_close is non-zero
*/
static uint32_t daplka_pending_close = 0;
static struct ibt_clnt_modinfo_s daplka_clnt_modinfo = {
IBTI_V_CURR,
IBT_USER,
daplka_async_handler,
NULL,
DAPLKA_DRV_NAME
};
/*
* Module Installation
*/
int
_init(void)
{
int status;
status = ddi_soft_state_init(&daplka_state, sizeof (daplka_t), 1);
if (status != 0) {
return (status);
}
mutex_init(&daplka_dbglock, NULL, MUTEX_DRIVER, NULL);
bzero(daplka_dbgbuf, sizeof (daplka_dbgbuf));
daplka_dbgnext = 0;
daplka_dbginit = 1;
daplka_resource_init();
status = mod_install(&modlinkage);
if (status != DDI_SUCCESS) {
/* undo inits done before mod_install */
daplka_resource_fini();
mutex_destroy(&daplka_dbglock);
ddi_soft_state_fini(&daplka_state);
}
return (status);
}
/*
* Module Removal
*/
int
_fini(void)
{
int status;
/*
* mod_remove causes detach to be called
*/
if ((status = mod_remove(&modlinkage)) != 0) {
DERR("fini: mod_remove failed: 0x%x\n", status);
return (status);
}
daplka_resource_fini();
mutex_destroy(&daplka_dbglock);
ddi_soft_state_fini(&daplka_state);
return (status);
}
/*
* Return Module Info.
*/
int
_info(struct modinfo *modinfop)
{
return (mod_info(&modlinkage, modinfop));
}
static void
daplka_enqueue_hca(daplka_t *dp, daplka_hca_t *hca)
{
daplka_hca_t *h;
ASSERT(mutex_owned(&dp->daplka_mutex));
if (dp->daplka_hca_list_head == NULL) {
dp->daplka_hca_list_head = hca;
} else {
h = dp->daplka_hca_list_head;
while (h->hca_next != NULL)
h = h->hca_next;
h->hca_next = hca;
}
}
static void
daplka_dequeue_hca(daplka_t *dp, daplka_hca_t *hca)
{
daplka_hca_t *h;
ASSERT(mutex_owned(&dp->daplka_mutex));
if (dp->daplka_hca_list_head == hca)
dp->daplka_hca_list_head = hca->hca_next;
else {
h = dp->daplka_hca_list_head;
while (h->hca_next != hca)
h = h->hca_next;
h->hca_next = hca->hca_next;
}
}
static int
daplka_init_hca(daplka_t *dp, ib_guid_t hca_guid)
{
daplka_hca_t *hca;
ibt_hca_portinfo_t *pinfop;
uint_t size;
int j;
ibt_status_t status;
hca = kmem_zalloc(sizeof (daplka_hca_t), KM_SLEEP);
hca->hca_guid = hca_guid;
/*
* open the HCA for use
*/
status = ibt_open_hca(dp->daplka_clnt_hdl, hca_guid, &hca->hca_hdl);
if (status != IBT_SUCCESS) {
if (status == IBT_HCA_IN_USE) {
DERR("ibt_open_hca() returned IBT_HCA_IN_USE\n");
} else {
DERR("ibt_open_hca() returned %d\n", status);
}
kmem_free(hca, sizeof (daplka_hca_t));
return (status);
}
/*
* query HCA to get its info
*/
status = ibt_query_hca(hca->hca_hdl, &hca->hca_attr);
if (status != IBT_SUCCESS) {
DERR("ibt_query_hca returned %d (hca_guid 0x%llx)\n",
status, (longlong_t)hca_guid);
goto out;
}
/*
* query HCA to get info of all ports
*/
status = ibt_query_hca_ports(hca->hca_hdl,
0, &pinfop, &hca->hca_nports, &size);
if (status != IBT_SUCCESS) {
DERR("ibt_query_all_ports returned %d "
"(hca_guid 0x%llx)\n", status,
(longlong_t)hca_guid);
goto out;
}
hca->hca_ports = pinfop;
hca->hca_pinfosz = size;
DERR("hca guid 0x%llx, nports %d\n",
(longlong_t)hca_guid, hca->hca_nports);
for (j = 0; j < hca->hca_nports; j++) {
DERR("port %d: state %d prefix 0x%016llx "
"guid %016llx\n",
pinfop[j].p_port_num, pinfop[j].p_linkstate,
(longlong_t)pinfop[j].p_sgid_tbl[0].gid_prefix,
(longlong_t)pinfop[j].p_sgid_tbl[0].gid_guid);
}
mutex_enter(&dp->daplka_mutex);
daplka_enqueue_hca(dp, hca);
mutex_exit(&dp->daplka_mutex);
return (IBT_SUCCESS);
out:
(void) ibt_close_hca(hca->hca_hdl);
kmem_free(hca, sizeof (daplka_hca_t));
return (status);
}
/*
* this function obtains the list of HCAs from IBTF.
* the HCAs are then opened and the returned handles
* and attributes are stored into the global daplka_dev
* structure.
*/
static int
daplka_init_hcas(daplka_t *dp)
{
int i;
ib_guid_t *hca_guids;
uint32_t hca_count;
/*
* get the num & list of HCAs present
*/
hca_count = ibt_get_hca_list(&hca_guids);
DERR("No. of HCAs present %d\n", hca_count);
if (hca_count != 0) {
/*
* get the info for each available HCA
*/
for (i = 0; i < hca_count; i++)
(void) daplka_init_hca(dp, hca_guids[i]);
ibt_free_hca_list(hca_guids, hca_count);
}
if (dp->daplka_hca_list_head != NULL)
return (IBT_SUCCESS);
else
return (IBT_FAILURE);
}
static int
daplka_fini_hca(daplka_t *dp, daplka_hca_t *hca)
{
ibt_status_t status;
if (hca->hca_hdl != NULL) {
status = ibt_close_hca(hca->hca_hdl);
if (status != IBT_SUCCESS) {
DERR("ibt_close_hca returned %d"
" (hca_guid 0x%llx)\n", status,
(longlong_t)hca->hca_guid);
mutex_enter(&dp->daplka_mutex);
daplka_enqueue_hca(dp, hca);
mutex_exit(&dp->daplka_mutex);
return (status);
}
}
if (hca->hca_ports != NULL)
ibt_free_portinfo(hca->hca_ports, hca->hca_pinfosz);
kmem_free(hca, sizeof (daplka_hca_t));
return (IBT_SUCCESS);
}
/*
* closes all HCAs and frees up the HCA list
*/
static int
daplka_fini_hcas(daplka_t *dp)
{
ibt_status_t status;
daplka_hca_t *hca;
mutex_enter(&daplka_dev->daplka_mutex);
while ((hca = dp->daplka_hca_list_head) != NULL) {
if (DAPLKA_HCA_BUSY(hca)) {
mutex_exit(&daplka_dev->daplka_mutex);
return (IBT_HCA_RESOURCES_NOT_FREED);
}
daplka_dequeue_hca(daplka_dev, hca);
mutex_exit(&daplka_dev->daplka_mutex);
if ((status = daplka_fini_hca(dp, hca)) != IBT_SUCCESS)
return (status);
mutex_enter(&daplka_dev->daplka_mutex);
}
mutex_exit(&daplka_dev->daplka_mutex);
DERR("dapl kernel agent unloaded\n");
return (IBT_SUCCESS);
}
/*
* Attach the device, create and fill in daplka_dev
*/
static int
daplka_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
{
daplka_t *dp;
int instance, retval, err;
boolean_t sp_htbl_allocated = B_FALSE;
boolean_t timer_htbl_allocated = B_FALSE;
boolean_t shared_mr_tree_allocated = B_FALSE;
switch (cmd) {
case DDI_ATTACH:
break;
case DDI_RESUME:
return (DDI_SUCCESS);
default:
return (DDI_FAILURE);
}
/*
* Allocate soft data structure
*/
instance = ddi_get_instance(dip);
if (ddi_soft_state_zalloc(daplka_state, instance) != DDI_SUCCESS) {
DERR("attach: bad state zalloc\n");
return (DDI_FAILURE);
}
dp = ddi_get_soft_state(daplka_state, instance);
if (dp == NULL) {
ddi_soft_state_free(daplka_state, instance);
DERR("attach: cannot get soft state\n");
return (DDI_FAILURE);
}
/*
* Stuff private info into dip.
*/
dp->daplka_dip = dip;
ddi_set_driver_private(dip, dp);
daplka_dev = dp;
mutex_init(&dp->daplka_mutex, NULL, MUTEX_DRIVER, NULL);
/*
* Register driver with IBTF
*/
retval = ibt_attach(&daplka_clnt_modinfo, dip, dp,
&dp->daplka_clnt_hdl);
if (retval != IBT_SUCCESS) {
DERR("attach: ibt_attach failed: error = %d\n", retval);
retval = DDI_FAILURE;
goto error;
}
/* Register to receive SM events */
ibt_register_subnet_notices(dp->daplka_clnt_hdl,
daplka_sm_notice_handler, NULL);
retval = daplka_init_hcas(dp);
if (retval != IBT_SUCCESS) {
DERR("attach: hca_init failed: error = %d\n", retval);
retval = DDI_FAILURE;
goto error;
}
/*
* this table is used by cr_handoff
*/
retval = daplka_hash_create(&daplka_global_sp_htbl,
DAPLKA_G_SP_HTBL_SZ, daplka_hash_sp_unref,
daplka_hash_generic_lookup);
if (retval != 0) {
DERR("attach: cannot create sp hash table\n");
retval = DDI_FAILURE;
goto error;
}
sp_htbl_allocated = B_TRUE;
/*
* this table stores per EP timer information.
* timer_info_t objects are inserted into this table whenever
* a EP timer is set. timers get removed when they expire
* or when they get cancelled.
*/
retval = daplka_hash_create(&daplka_timer_info_htbl,
DAPLKA_TIMER_HTBL_SZ, daplka_hash_timer_free, NULL);
if (retval != 0) {
DERR("attach: cannot create timer hash table\n");
retval = DDI_FAILURE;
goto error;
}
timer_htbl_allocated = B_TRUE;
/*
* this taskq is currently only used for processing timers.
* other processing may also use this taskq in the future.
*/
daplka_taskq = taskq_create(DAPLKA_DRV_NAME, DAPLKA_TQ_NTHREADS,
maxclsyspri, 1, DAPLKA_TQ_NTHREADS, TASKQ_DYNAMIC);
if (daplka_taskq == NULL) {
DERR("attach: cannot create daplka_taskq\n");
retval = DDI_FAILURE;
goto error;
}
/*
* daplka_shared_mr_tree holds daplka_shared_mr_t objects that
* gets retrieved or created when daplka_mr_register_shared is
* called.
*/
mutex_init(&daplka_shared_mr_lock, NULL, MUTEX_DRIVER, NULL);
avl_create(&daplka_shared_mr_tree, daplka_shared_mr_cmp,
sizeof (daplka_shared_mr_t),
offsetof(daplka_shared_mr_t, smr_node));
shared_mr_tree_allocated = B_TRUE;
/*
* Create the filesystem device node.
*/
if (ddi_create_minor_node(dip, DAPLKA_MINOR_NAME, S_IFCHR,
0, DDI_PSEUDO, NULL) != DDI_SUCCESS) {
DERR("attach: bad create_minor_node\n");
retval = DDI_FAILURE;
goto error;
}
dp->daplka_status = DAPLKA_STATE_ATTACHED;
ddi_report_dev(dip);
return (DDI_SUCCESS);
error:
if (shared_mr_tree_allocated) {
avl_destroy(&daplka_shared_mr_tree);
mutex_destroy(&daplka_shared_mr_lock);
}
if (daplka_taskq) {
taskq_destroy(daplka_taskq);
daplka_taskq = NULL;
}
if (timer_htbl_allocated) {
daplka_hash_destroy(&daplka_timer_info_htbl);
}
if (sp_htbl_allocated) {
daplka_hash_destroy(&daplka_global_sp_htbl);
}
err = daplka_fini_hcas(dp);
if (err != IBT_SUCCESS) {
DERR("attach: hca_fini returned %d\n", err);
}
if (dp->daplka_clnt_hdl != NULL) {
/* unregister SM event notification */
ibt_register_subnet_notices(dp->daplka_clnt_hdl,
(ibt_sm_notice_handler_t)NULL, NULL);
err = ibt_detach(dp->daplka_clnt_hdl);
if (err != IBT_SUCCESS) {
DERR("attach: ibt_detach returned %d\n", err);
}
}
mutex_destroy(&dp->daplka_mutex);
if (dp->daplka_status == DAPLKA_STATE_ATTACHED) {
ddi_remove_minor_node(dip, NULL);
}
ddi_soft_state_free(daplka_state, instance);
return (retval);
}
/*
* Detach - Free resources allocated in attach
*/
/* ARGSUSED */
static int
daplka_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
{
int instance, err;
void *cookie = NULL;
daplka_t *dp;
if (cmd != DDI_DETACH) {
return (DDI_FAILURE);
}
if (daplka_resource.daplka_rc_cnt > 0 ||
daplka_pending_close > 0) {
DERR("detach: driver in use\n");
return (DDI_FAILURE);
}
instance = ddi_get_instance(dip);
dp = ddi_get_soft_state(daplka_state, instance);
if (dp == NULL) {
DERR("detach: cannot get soft state\n");
return (DDI_FAILURE);
}
err = daplka_fini_hcas(dp);
if (err != IBT_SUCCESS) {
DERR("detach: hca_fini returned %d\n", err);
return (DDI_FAILURE);
}
if (dp->daplka_clnt_hdl != NULL) {
/* unregister SM event notification */
ibt_register_subnet_notices(dp->daplka_clnt_hdl,
(ibt_sm_notice_handler_t)NULL, NULL);
err = ibt_detach(dp->daplka_clnt_hdl);
if (err != IBT_SUCCESS) {
DERR("detach: ibt_detach returned %d\n", err);
return (DDI_FAILURE);
}
dp->daplka_clnt_hdl = NULL;
}
mutex_destroy(&dp->daplka_mutex);
if (dp->daplka_status == DAPLKA_STATE_ATTACHED) {
ddi_remove_minor_node(dip, NULL);
}
dp->daplka_status = DAPLKA_STATE_DETACHED;
ddi_soft_state_free(daplka_state, instance);
daplka_dev = NULL;
/*
* by the time we get here, all clients of dapl should
* have exited and completed their cleanup properly.
* we can assert that all global data structures are now
* empty.
*/
ASSERT(avl_destroy_nodes(&daplka_shared_mr_tree, &cookie) == NULL);
avl_destroy(&daplka_shared_mr_tree);
mutex_destroy(&daplka_shared_mr_lock);
ASSERT(daplka_hash_getsize(&daplka_timer_info_htbl) == 0);
daplka_hash_destroy(&daplka_timer_info_htbl);
ASSERT(daplka_hash_getsize(&daplka_global_sp_htbl) == 0);
daplka_hash_destroy(&daplka_global_sp_htbl);
taskq_destroy(daplka_taskq);
return (DDI_SUCCESS);
}
/* ARGSUSED */
static int
daplka_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
{
switch (infocmd) {
case DDI_INFO_DEVT2DEVINFO:
if (daplka_dev != NULL) {
*result = daplka_dev->daplka_dip;
return (DDI_SUCCESS);
} else {
return (DDI_FAILURE);
}
case DDI_INFO_DEVT2INSTANCE:
*result = 0;
return (DDI_SUCCESS);
default:
return (DDI_FAILURE);
}
}
/*
* creates a EP resource.
* A EP resource contains a RC channel. A EP resource holds a
* reference to a send_evd (for the send CQ), recv_evd (for the
* recv CQ), a connection evd and a PD. These references ensure
* that the referenced resources are not freed until the EP itself
* gets freed.
*/
/* ARGSUSED */
static int
daplka_ep_create(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_ep_resource_t *ep_rp;
daplka_pd_resource_t *pd_rp;
dapl_ep_create_t args;
ibt_rc_chan_alloc_args_t chan_args;
ibt_chan_alloc_flags_t achan_flags;
ibt_chan_sizes_t chan_real_sizes;
ibt_hca_attr_t *hca_attrp;
uint64_t ep_hkey = 0;
boolean_t inserted = B_FALSE;
uint32_t old_state, new_state;
int retval;
ibt_status_t status;
D3("ep_create: enter\n");
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_ep_create_t),
mode);
if (retval != 0) {
DERR("ep_create: copyin error %d\n", retval);
return (EFAULT);
}
ep_rp = kmem_zalloc(sizeof (daplka_ep_resource_t), daplka_km_flags);
if (ep_rp == NULL) {
DERR("ep_create: cannot allocate ep_rp\n");
return (ENOMEM);
}
DAPLKA_RS_INIT(ep_rp, DAPL_TYPE_EP,
DAPLKA_RS_RNUM(ia_rp), daplka_ep_destroy);
mutex_init(&ep_rp->ep_lock, NULL, MUTEX_DRIVER, NULL);
cv_init(&ep_rp->ep_cv, NULL, CV_DRIVER, NULL);
ep_rp->ep_hca = ia_rp->ia_hca;
ep_rp->ep_cookie = args.ep_cookie;
ep_rp->ep_timer_hkey = 0;
/*
* we don't have to use ep_get_state here because ep_rp is not in
* ep_htbl yet. refer to the description of daplka_ep_set_state
* for details about the EP state machine.
*/
ep_rp->ep_state = DAPLKA_EP_STATE_TRANSITIONING;
new_state = old_state = DAPLKA_EP_STATE_CLOSED;
/* get reference to send evd and get cq handle */
ep_rp->ep_snd_evd = (daplka_evd_resource_t *)
daplka_hash_lookup(&ia_rp->ia_evd_htbl, args.ep_snd_evd_hkey);
if (ep_rp->ep_snd_evd == NULL) {
DERR("ep_create: ep_snd_evd %llx not found\n",
args.ep_snd_evd_hkey);
retval = EINVAL;
goto cleanup;
}
chan_args.rc_scq = ep_rp->ep_snd_evd->evd_cq_hdl;
if (chan_args.rc_scq == NULL) {
DERR("ep_create: ep_snd_evd cq invalid\n");
retval = EINVAL;
goto cleanup;
}
/* get reference to recv evd and get cq handle */
ep_rp->ep_rcv_evd = (daplka_evd_resource_t *)
daplka_hash_lookup(&ia_rp->ia_evd_htbl, args.ep_rcv_evd_hkey);
if (ep_rp->ep_rcv_evd == NULL) {
DERR("ep_create: ep_rcv_evd %llx not found\n",
args.ep_rcv_evd_hkey);
retval = EINVAL;
goto cleanup;
}
chan_args.rc_rcq = ep_rp->ep_rcv_evd->evd_cq_hdl;
if (chan_args.rc_rcq == NULL) {
DERR("ep_create: ep_rcv_evd cq invalid\n");
retval = EINVAL;
goto cleanup;
}
/* get reference to conn evd */
ep_rp->ep_conn_evd = (daplka_evd_resource_t *)
daplka_hash_lookup(&ia_rp->ia_evd_htbl, args.ep_conn_evd_hkey);
if (ep_rp->ep_conn_evd == NULL) {
DERR("ep_create: ep_conn_evd %llx not found\n",
args.ep_conn_evd_hkey);
retval = EINVAL;
goto cleanup;
}
/* get reference to SRQ if needed */
if (args.ep_srq_attached) {
ep_rp->ep_srq_res = (daplka_srq_resource_t *)daplka_hash_lookup(
&ia_rp->ia_srq_htbl, args.ep_srq_hkey);
if (ep_rp->ep_srq_res == NULL) {
DERR("ep_create: ep_srq %llx not found\n",
(longlong_t)args.ep_srq_hkey);
retval = EINVAL;
goto cleanup;
}
ASSERT(DAPLKA_RS_TYPE(ep_rp->ep_srq_res) == DAPL_TYPE_SRQ);
D3("ep_create: ep_srq %p %llx\n", ep_rp->ep_srq_res,
(longlong_t)args.ep_srq_hkey);
} else {
ep_rp->ep_srq_res = NULL;
}
/* get pd handle */
pd_rp = (daplka_pd_resource_t *)
daplka_hash_lookup(&ia_rp->ia_pd_htbl, args.ep_pd_hkey);
if (pd_rp == NULL) {
DERR("ep_create: cannot find pd resource\n");
retval = EINVAL;
goto cleanup;
}
ASSERT(DAPLKA_RS_TYPE(pd_rp) == DAPL_TYPE_PD);
ep_rp->ep_pd_res = pd_rp;
chan_args.rc_pd = pd_rp->pd_hdl;
/*
* these checks ensure that the requested channel sizes
* are within the limits supported by the chosen HCA.
*/
hca_attrp = &ia_rp->ia_hca->hca_attr;
if (args.ep_ch_sizes.dcs_sq_sgl > hca_attrp->hca_max_sgl) {
DERR("ep_create: invalid cs_sq_sgl %d\n",
args.ep_ch_sizes.dcs_sq_sgl);
retval = EINVAL;
goto cleanup;
}
if (args.ep_ch_sizes.dcs_rq_sgl > hca_attrp->hca_max_sgl) {
DERR("ep_create: invalid cs_rq_sgl %d\n",
args.ep_ch_sizes.dcs_rq_sgl);
retval = EINVAL;
goto cleanup;
}
if (args.ep_ch_sizes.dcs_sq > hca_attrp->hca_max_chan_sz) {
DERR("ep_create: invalid cs_sq %d\n",
args.ep_ch_sizes.dcs_sq);
retval = EINVAL;
goto cleanup;
}
if (args.ep_ch_sizes.dcs_rq > hca_attrp->hca_max_chan_sz) {
DERR("ep_create: invalid cs_rq %d\n",
args.ep_ch_sizes.dcs_rq);
retval = EINVAL;
goto cleanup;
}
chan_args.rc_sizes.cs_sq_sgl = args.ep_ch_sizes.dcs_sq_sgl;
chan_args.rc_sizes.cs_rq_sgl = args.ep_ch_sizes.dcs_rq_sgl;
chan_args.rc_sizes.cs_sq = args.ep_ch_sizes.dcs_sq;
chan_args.rc_sizes.cs_rq = args.ep_ch_sizes.dcs_rq;
chan_args.rc_flags = IBT_WR_SIGNALED;
chan_args.rc_control = IBT_CEP_RDMA_RD | IBT_CEP_RDMA_WR;
chan_args.rc_hca_port_num = ia_rp->ia_port_num;
chan_args.rc_clone_chan = NULL;
if (args.ep_srq_attached) {
chan_args.rc_srq = ep_rp->ep_srq_res->srq_hdl;
} else {
chan_args.rc_srq = NULL;
}
D3("ep_create: sq_sgl %d, rq_sgl %d, sq %d, rq %d, "
"sig_type 0x%x, control 0x%x, portnum %d, clone_chan 0x%p\n",
args.ep_ch_sizes.dcs_sq_sgl, args.ep_ch_sizes.dcs_rq_sgl,
args.ep_ch_sizes.dcs_sq, args.ep_ch_sizes.dcs_rq,
chan_args.rc_flags, chan_args.rc_control,
chan_args.rc_hca_port_num, chan_args.rc_clone_chan);
if (args.ep_srq_attached) {
achan_flags = IBT_ACHAN_USER_MAP | IBT_ACHAN_USES_SRQ;
} else {
achan_flags = IBT_ACHAN_USER_MAP;
}
/* create rc channel */
status = daplka_ibt_alloc_rc_channel(ep_rp, ia_rp->ia_hca_hdl,
achan_flags, &chan_args, &ep_rp->ep_chan_hdl,
&chan_real_sizes);
if (status != IBT_SUCCESS) {
DERR("ep_create: alloc_rc_channel returned %d\n", status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
args.ep_ch_real_sizes.dcs_sq = chan_real_sizes.cs_sq;
args.ep_ch_real_sizes.dcs_rq = chan_real_sizes.cs_rq;
args.ep_ch_real_sizes.dcs_sq_sgl = chan_real_sizes.cs_sq_sgl;
args.ep_ch_real_sizes.dcs_rq_sgl = chan_real_sizes.cs_rq_sgl;
/*
* store ep ptr with chan_hdl.
* this ep_ptr is used by the CM handlers (both active and
* passive)
* mutex is only needed for race of "destroy" and "async"
*/
mutex_enter(&daplka_dev->daplka_mutex);
ibt_set_chan_private(ep_rp->ep_chan_hdl, (void *)ep_rp);
mutex_exit(&daplka_dev->daplka_mutex);
/* Get HCA-specific data_out info */
status = ibt_ci_data_out(ia_rp->ia_hca_hdl,
IBT_CI_NO_FLAGS, IBT_HDL_CHANNEL, (void *)ep_rp->ep_chan_hdl,
&args.ep_qp_data_out, sizeof (args.ep_qp_data_out));
if (status != IBT_SUCCESS) {
DERR("ep_create: ibt_ci_data_out error(%d)\n",
status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
/* insert into ep hash table */
retval = daplka_hash_insert(&ia_rp->ia_ep_htbl,
&ep_hkey, (void *)ep_rp);
if (retval != 0) {
DERR("ep_create: cannot insert ep resource into ep_htbl\n");
goto cleanup;
}
inserted = B_TRUE;
/*
* at this point, the ep_rp can be looked up by other threads
* if they manage to guess the correct hkey. but they are not
* permitted to operate on ep_rp until we transition to the
* CLOSED state.
*/
/* return hkey to library */
args.ep_hkey = ep_hkey;
retval = ddi_copyout(&args, (void *)arg, sizeof (dapl_ep_create_t),
mode);
if (retval != 0) {
DERR("ep_create: copyout error %d\n", retval);
retval = EFAULT;
goto cleanup;
}
daplka_ep_set_state(ep_rp, old_state, new_state);
D3("ep_create: exit\n");
return (0);
cleanup:
if (inserted) {
daplka_ep_resource_t *free_rp = NULL;
(void) daplka_hash_remove(&ia_rp->ia_ep_htbl, ep_hkey,
(void **)&free_rp);
if (free_rp != ep_rp) {
/*
* this case is impossible because ep_free will
* wait until our state transition is complete.
*/
DERR("ep_create: cannot remove ep from hash table\n");
ASSERT(B_FALSE);
return (retval);
}
}
new_state = DAPLKA_EP_STATE_FREED;
daplka_ep_set_state(ep_rp, old_state, new_state);
DAPLKA_RS_UNREF(ep_rp);
return (retval);
}
/*
* daplka_ep_get_state retrieves the current state of the EP and
* sets the state to TRANSITIONING. if the current state is already
* TRANSITIONING, this function will wait until the state becomes one
* of the other EP states. Most of the EP related ioctls follow the
* call sequence:
*
* new_state = old_state = daplka_ep_get_state(ep_rp);
* ...
* ...some code that affects the EP
* ...
* new_state = <NEW_STATE>;
* daplka_ep_set_state(ep_rp, old_state, new_state);
*
* this call sequence ensures that only one thread may access the EP
* during the time ep_state is in TRANSITIONING. daplka_ep_set_state
* transitions ep_state to new_state and wakes up any waiters blocking
* on ep_cv.
*
*/
static uint32_t
daplka_ep_get_state(daplka_ep_resource_t *ep_rp)
{
uint32_t old_state = 0;
mutex_enter(&ep_rp->ep_lock);
while (ep_rp->ep_state == DAPLKA_EP_STATE_TRANSITIONING) {
D2("get_state: wait for state transition to complete\n");
cv_wait(&ep_rp->ep_cv, &ep_rp->ep_lock);
D2("get_state: done, curr state = %d\n", ep_rp->ep_state);
}
ASSERT(ep_rp->ep_state != DAPLKA_EP_STATE_TRANSITIONING);
old_state = ep_rp->ep_state;
/*
* an ep that is in the FREED state cannot transition
* back to any of the regular states
*/
if (old_state != DAPLKA_EP_STATE_FREED) {
ep_rp->ep_state = DAPLKA_EP_STATE_TRANSITIONING;
}
mutex_exit(&ep_rp->ep_lock);
return (old_state);
}
/*
* EP state transition diagram
*
* CLOSED<-------------------
* | |
* | |
* ------------------------ |
* | | |
* | | |
* v v |
* CONNECTING ACCEPTING |
* | | | | | |
* | | | | | |
* | | | | | |
* | | |_______|_______| |
* | | | | | |
* | |___________| | | |
* | | | | |
* | v | |---->DISCONNECTED
* | CONNECTED | ^
* v | | |
* ABORTING |---------|--------------|
* | | | |
* | | v |
* | |-------->DISCONNECTING--|
* | |
* |---------------------------------|
*
* *not shown in this diagram:
* -loopback transitions
* -transitions to the FREED state
*/
static boolean_t
daplka_ep_transition_is_valid(uint32_t old_state, uint32_t new_state)
{
boolean_t valid = B_FALSE;
/*
* reseting to the same state is a no-op and is always
* permitted. transitioning to the FREED state indicates
* that the ep is about to be freed and no further operation
* is allowed on it. to support abrupt close, the ep is
* permitted to transition to the FREED state from any state.
*/
if (old_state == new_state ||
new_state == DAPLKA_EP_STATE_FREED) {
return (B_TRUE);
}
switch (old_state) {
case DAPLKA_EP_STATE_CLOSED:
/*
* this is the initial ep_state.
* a transition to CONNECTING or ACCEPTING may occur
* upon calling daplka_ep_connect or daplka_cr_accept,
* respectively.
*/
if (new_state == DAPLKA_EP_STATE_CONNECTING ||
new_state == DAPLKA_EP_STATE_ACCEPTING) {
valid = B_TRUE;
}
break;
case DAPLKA_EP_STATE_CONNECTING:
/*
* we transition to this state if daplka_ep_connect
* is successful. from this state, we can transition
* to CONNECTED if daplka_cm_rc_conn_est gets called;
* or to DISCONNECTED if daplka_cm_rc_conn_closed or
* daplka_cm_rc_event_failure gets called. If the
* client calls daplka_ep_disconnect, we transition
* to DISCONNECTING. If a timer was set at ep_connect
* time and if the timer expires prior to any of the
* CM callbacks, we transition to ABORTING and then
* to DISCONNECTED.
*/
if (new_state == DAPLKA_EP_STATE_CONNECTED ||
new_state == DAPLKA_EP_STATE_DISCONNECTING ||
new_state == DAPLKA_EP_STATE_DISCONNECTED ||
new_state == DAPLKA_EP_STATE_ABORTING) {
valid = B_TRUE;
}
break;
case DAPLKA_EP_STATE_ACCEPTING:
/*
* we transition to this state if daplka_cr_accept
* is successful. from this state, we can transition
* to CONNECTED if daplka_cm_service_conn_est gets called;
* or to DISCONNECTED if daplka_cm_service_conn_closed or
* daplka_cm_service_event_failure gets called. If the
* client calls daplka_ep_disconnect, we transition to
* DISCONNECTING.
*/
if (new_state == DAPLKA_EP_STATE_CONNECTED ||
new_state == DAPLKA_EP_STATE_DISCONNECTING ||
new_state == DAPLKA_EP_STATE_DISCONNECTED) {
valid = B_TRUE;
}
break;
case DAPLKA_EP_STATE_CONNECTED:
/*
* we transition to this state if a active or passive
* connection gets established. if the client calls
* daplka_ep_disconnect, we transition to the
* DISCONNECTING state. subsequent CM callbacks will
* cause ep_state to be set to DISCONNECTED. If the
* remote peer terminates the connection before we do,
* it is possible for us to transition directly from
* CONNECTED to DISCONNECTED.
*/
if (new_state == DAPLKA_EP_STATE_DISCONNECTING ||
new_state == DAPLKA_EP_STATE_DISCONNECTED) {
valid = B_TRUE;
}
break;
case DAPLKA_EP_STATE_DISCONNECTING:
/*
* we transition to this state if the client calls
* daplka_ep_disconnect.
*/
if (new_state == DAPLKA_EP_STATE_DISCONNECTED) {
valid = B_TRUE;
}
break;
case DAPLKA_EP_STATE_ABORTING:
/*
* we transition to this state if the active side
* EP timer has expired. this is only a transient
* state that is set during timer processing. when
* timer processing completes, ep_state will become
* DISCONNECTED.
*/
if (new_state == DAPLKA_EP_STATE_DISCONNECTED) {
valid = B_TRUE;
}
break;
case DAPLKA_EP_STATE_DISCONNECTED:
/*
* we transition to this state if we get a closed
* or event_failure CM callback. an expired timer
* can also cause us to be in this state. this
* is the only state in which we permit the
* ep_reinit operation.
*/
if (new_state == DAPLKA_EP_STATE_CLOSED) {
valid = B_TRUE;
}
break;
default:
break;
}
if (!valid) {
DERR("ep_transition: invalid state change %d -> %d\n",
old_state, new_state);
}
return (valid);
}
/*
* first check if the transition is valid. then set ep_state
* to new_state and wake up all waiters.
*/
static void
daplka_ep_set_state(daplka_ep_resource_t *ep_rp, uint32_t old_state,
uint32_t new_state)
{
boolean_t valid;
ASSERT(new_state != DAPLKA_EP_STATE_TRANSITIONING);
valid = daplka_ep_transition_is_valid(old_state, new_state);
mutex_enter(&ep_rp->ep_lock);
if (ep_rp->ep_state != DAPLKA_EP_STATE_FREED) {
if (valid) {
ep_rp->ep_state = new_state;
} else {
/*
* this case is impossible.
* we have a serious problem if we get here.
* instead of panicing, we reset the state to
* old_state. doing this would at least prevent
* threads from hanging due to ep_state being
* stuck in TRANSITIONING.
*/
ep_rp->ep_state = old_state;
ASSERT(B_FALSE);
}
}
cv_broadcast(&ep_rp->ep_cv);
mutex_exit(&ep_rp->ep_lock);
}
/*
* modifies RC channel attributes.
* currently, only the rdma_in and rdma_out attributes may
* be modified. the channel must be in quiescent state when
* this function is called.
*/
/* ARGSUSED */
static int
daplka_ep_modify(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_ep_resource_t *ep_rp = NULL;
ibt_cep_modify_flags_t good_flags;
ibt_rc_chan_modify_attr_t rcm_attr;
ibt_hca_attr_t *hca_attrp;
dapl_ep_modify_t args;
ibt_status_t status;
uint32_t old_state, new_state;
int retval = 0;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_ep_modify_t),
mode);
if (retval != 0) {
DERR("ep_modify: copyin error %d\n", retval);
return (EFAULT);
}
ep_rp = (daplka_ep_resource_t *)
daplka_hash_lookup(&ia_rp->ia_ep_htbl, args.epm_hkey);
if (ep_rp == NULL) {
DERR("ep_modify: cannot find ep resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(ep_rp) == DAPL_TYPE_EP);
new_state = old_state = daplka_ep_get_state(ep_rp);
if (old_state != DAPLKA_EP_STATE_CLOSED &&
old_state != DAPLKA_EP_STATE_DISCONNECTED) {
DERR("ep_modify: invalid state %d\n", old_state);
retval = EINVAL;
goto cleanup;
}
good_flags = IBT_CEP_SET_RDMARA_OUT | IBT_CEP_SET_RDMARA_IN;
if ((args.epm_flags & ~good_flags) != 0) {
DERR("ep_modify: invalid flags 0x%x\n", args.epm_flags);
retval = EINVAL;
goto cleanup;
}
hca_attrp = &ia_rp->ia_hca->hca_attr;
bzero(&rcm_attr, sizeof (ibt_rc_chan_modify_attr_t));
if ((args.epm_flags & IBT_CEP_SET_RDMARA_OUT) != 0) {
if (args.epm_rdma_ra_out > hca_attrp->hca_max_rdma_out_chan) {
DERR("ep_modify: invalid epm_rdma_ra_out %d\n",
args.epm_rdma_ra_out);
retval = EINVAL;
goto cleanup;
}
rcm_attr.rc_rdma_ra_out = args.epm_rdma_ra_out;
}
if ((args.epm_flags & IBT_CEP_SET_RDMARA_IN) != 0) {
if (args.epm_rdma_ra_in > hca_attrp->hca_max_rdma_in_chan) {
DERR("ep_modify: epm_rdma_ra_in %d\n",
args.epm_rdma_ra_in);
retval = EINVAL;
goto cleanup;
}
rcm_attr.rc_rdma_ra_in = args.epm_rdma_ra_in;
}
status = ibt_modify_rc_channel(ep_rp->ep_chan_hdl, args.epm_flags,
&rcm_attr, NULL);
if (status != IBT_SUCCESS) {
DERR("ep_modify: modify_rc_channel returned %d\n", status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
/*
* ep_modify does not change ep_state
*/
cleanup:;
daplka_ep_set_state(ep_rp, old_state, new_state);
DAPLKA_RS_UNREF(ep_rp);
return (retval);
}
/*
* Frees a EP resource.
* a EP may only be freed when it is in the CLOSED or
* DISCONNECTED state.
*/
/* ARGSUSED */
static int
daplka_ep_free(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_ep_resource_t *ep_rp = NULL;
dapl_ep_free_t args;
uint32_t old_state, new_state;
int retval;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_ep_free_t), mode);
if (retval != 0) {
DERR("ep_free: copyin error %d\n", retval);
return (EFAULT);
}
ep_rp = (daplka_ep_resource_t *)
daplka_hash_lookup(&ia_rp->ia_ep_htbl, args.epf_hkey);
if (ep_rp == NULL) {
DERR("ep_free: cannot find ep resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(ep_rp) == DAPL_TYPE_EP);
new_state = old_state = daplka_ep_get_state(ep_rp);
/*
* ep cannot be freed if it is in an invalid state.
*/
if (old_state != DAPLKA_EP_STATE_CLOSED &&
old_state != DAPLKA_EP_STATE_DISCONNECTED) {
DERR("ep_free: invalid state %d\n", old_state);
retval = EINVAL;
goto cleanup;
}
ep_rp = NULL;
retval = daplka_hash_remove(&ia_rp->ia_ep_htbl,
args.epf_hkey, (void **)&ep_rp);
if (retval != 0 || ep_rp == NULL) {
/*
* this is only possible if we have two threads
* calling ep_free in parallel.
*/
DERR("ep_free: cannot find ep resource\n");
goto cleanup;
}
/* there should not be any outstanding timers */
ASSERT(ep_rp->ep_timer_hkey == 0);
new_state = DAPLKA_EP_STATE_FREED;
daplka_ep_set_state(ep_rp, old_state, new_state);
/* remove reference obtained by lookup */
DAPLKA_RS_UNREF(ep_rp);
/* UNREF calls the actual free function when refcnt is zero */
DAPLKA_RS_UNREF(ep_rp);
return (0);
cleanup:;
daplka_ep_set_state(ep_rp, old_state, new_state);
/* remove reference obtained by lookup */
DAPLKA_RS_UNREF(ep_rp);
return (retval);
}
/*
* The following routines supports the timeout feature of ep_connect.
* Refer to the description of ep_connect for details.
*/
/*
* this is the timer processing thread.
*/
static void
daplka_timer_thread(void *arg)
{
daplka_timer_info_t *timerp = (daplka_timer_info_t *)arg;
daplka_ep_resource_t *ep_rp;
daplka_evd_event_t *disc_ev = NULL;
ibt_status_t status;
int old_state, new_state;
ep_rp = timerp->ti_ep_res;
ASSERT(ep_rp != NULL);
ASSERT(timerp->ti_tmo_id != 0);
timerp->ti_tmo_id = 0;
new_state = old_state = daplka_ep_get_state(ep_rp);
if (old_state != DAPLKA_EP_STATE_CONNECTING) {
/* unblock hash_ep_free */
mutex_enter(&ep_rp->ep_lock);
ASSERT(ep_rp->ep_timer_hkey != 0);
ep_rp->ep_timer_hkey = 0;
cv_broadcast(&ep_rp->ep_cv);
mutex_exit(&ep_rp->ep_lock);
/* reset state to original state */
daplka_ep_set_state(ep_rp, old_state, new_state);
/* this function will also unref ep_rp */
daplka_timer_info_free(timerp);
return;
}
ASSERT(ep_rp->ep_timer_hkey != 0);
ep_rp->ep_timer_hkey = 0;
/*
* we cannot keep ep_state in TRANSITIONING if we call
* ibt_close_rc_channel in blocking mode. this would cause
* a deadlock because the cm callbacks will be blocked and
* will not be able to wake us up.
*/
new_state = DAPLKA_EP_STATE_ABORTING;
daplka_ep_set_state(ep_rp, old_state, new_state);
/*
* when we return from close_rc_channel, all callbacks should have
* completed. we can also be certain that these callbacks did not
* enqueue any events to conn_evd.
*/
status = ibt_close_rc_channel(ep_rp->ep_chan_hdl, IBT_BLOCKING,
NULL, 0, NULL, NULL, NULL);
if (status != IBT_SUCCESS) {
DERR("timer_thread: ibt_close_rc_channel returned %d\n",
status);
}
old_state = daplka_ep_get_state(ep_rp);
/*
* this is the only thread that can transition ep_state out
* of ABORTING. all other ep operations would fail when
* ep_state is in ABORTING.
*/
ASSERT(old_state == DAPLKA_EP_STATE_ABORTING);
disc_ev = kmem_zalloc(sizeof (daplka_evd_event_t), KM_SLEEP);
ASSERT(disc_ev != NULL);
disc_ev->ee_cmev.ec_cm_ev_type = DAPL_IB_CME_TIMED_OUT;
disc_ev->ee_cmev.ec_cm_cookie = ep_rp->ep_cookie;
disc_ev->ee_cmev.ec_cm_is_passive = B_FALSE;
disc_ev->ee_cmev.ec_cm_psep_cookie = 0;
disc_ev->ee_cmev.ec_cm_ev_priv_data = NULL;
disc_ev->ee_cmev.ec_cm_ev_priv_data_len = 0;
D2("timer_thread: enqueue event(%p) evdp(%p)\n",
disc_ev, ep_rp->ep_conn_evd);
new_state = DAPLKA_EP_STATE_DISCONNECTED;
daplka_ep_set_state(ep_rp, old_state, new_state);
daplka_evd_wakeup(ep_rp->ep_conn_evd,
&ep_rp->ep_conn_evd->evd_conn_events, disc_ev);
/* this function will also unref ep_rp */
daplka_timer_info_free(timerp);
}
/*
* dispatches a thread to continue with timer processing.
*/
static void
daplka_timer_dispatch(void *arg)
{
/*
* keep rescheduling this function until
* taskq_dispatch succeeds.
*/
if (taskq_dispatch(daplka_taskq,
daplka_timer_thread, arg, TQ_NOSLEEP) == 0) {
DERR("timer_dispatch: taskq_dispatch failed, retrying...\n");
(void) timeout(daplka_timer_dispatch, arg, 10);
}
}
/*
* this function is called by the kernel's callout thread.
* we first attempt to remove the timer object from the
* global timer table. if it is found, we dispatch a thread
* to continue processing the timer object. if it is not
* found, that means the timer has been cancelled by someone
* else.
*/
static void
daplka_timer_handler(void *arg)
{
uint64_t timer_hkey = (uintptr_t)arg;
daplka_timer_info_t *timerp = NULL;
D2("timer_handler: timer_hkey 0x%llx\n", (longlong_t)timer_hkey);
(void) daplka_hash_remove(&daplka_timer_info_htbl,
timer_hkey, (void **)&timerp);
if (timerp == NULL) {
D2("timer_handler: timer already cancelled\n");
return;
}
daplka_timer_dispatch((void *)timerp);
}
/*
* allocates a timer_info object.
* a reference to a EP is held by this object. this ensures
* that the EP stays valid when a timer is outstanding.
*/
static daplka_timer_info_t *
daplka_timer_info_alloc(daplka_ep_resource_t *ep_rp)
{
daplka_timer_info_t *timerp;
timerp = kmem_zalloc(sizeof (*timerp), daplka_km_flags);
if (timerp == NULL) {
DERR("timer_info_alloc: cannot allocate timer info\n");
return (NULL);
}
timerp->ti_ep_res = ep_rp;
timerp->ti_tmo_id = 0;
return (timerp);
}
/*
* Frees the timer_info object.
* we release the EP reference before freeing the object.
*/
static void
daplka_timer_info_free(daplka_timer_info_t *timerp)
{
ASSERT(timerp->ti_ep_res != NULL);
DAPLKA_RS_UNREF(timerp->ti_ep_res);
timerp->ti_ep_res = NULL;
ASSERT(timerp->ti_tmo_id == 0);
kmem_free(timerp, sizeof (*timerp));
}
/*
* cancels the timer set by ep_connect.
* returns -1 if timer handling is in progress
* and 0 otherwise.
*/
static int
daplka_cancel_timer(daplka_ep_resource_t *ep_rp)
{
/*
* this function can only be called when ep_state
* is frozen.
*/
ASSERT(ep_rp->ep_state == DAPLKA_EP_STATE_TRANSITIONING);
if (ep_rp->ep_timer_hkey != 0) {
daplka_timer_info_t *timerp = NULL;
(void) daplka_hash_remove(&daplka_timer_info_htbl,
ep_rp->ep_timer_hkey, (void **)&timerp);
if (timerp == NULL) {
/*
* this is possible if the timer_handler has
* removed the timerp but the taskq thread has
* not transitioned the ep_state to DISCONNECTED.
* we need to reset the ep_state to allow the
* taskq thread to continue with its work. the
* taskq thread will set the ep_timer_hkey to 0
* so we don't have to do it here.
*/
DERR("cancel_timer: timer is being processed\n");
return (-1);
}
/*
* we got the timer object. if the handler fires at
* this point, it will not be able to find the object
* and will return immediately. normally, ti_tmo_id gets
* cleared when the handler fires.
*/
ASSERT(timerp->ti_tmo_id != 0);
/*
* note that untimeout can possibly call the handler.
* we are safe because the handler will be a no-op.
*/
(void) untimeout(timerp->ti_tmo_id);
timerp->ti_tmo_id = 0;
daplka_timer_info_free(timerp);
ep_rp->ep_timer_hkey = 0;
}
return (0);
}
/*
* this function is called by daplka_hash_destroy for
* freeing timer_info objects
*/
static void
daplka_hash_timer_free(void *obj)
{
daplka_timer_info_free((daplka_timer_info_t *)obj);
}
/* ARGSUSED */
static uint16_t
daplka_hellomsg_cksum(DAPL_PRIVATE *dp)
{
uint8_t *bp;
int i;
uint16_t cksum = 0;
bp = (uint8_t *)dp;
for (i = 0; i < sizeof (DAPL_PRIVATE); i++) {
cksum += bp[i];
}
return (cksum);
}
/*
* ep_connect is called by the client to initiate a connection to a
* remote service point. It is a non-blocking call. If a non-zero
* timeout is specified by the client, a timer will be set just before
* returning from ep_connect. Upon a successful return from ep_connect,
* the client will call evd_wait to wait for the connection to complete.
* If the connection is rejected or has failed due to an error, the
* client will be notified with an event containing the appropriate error
* code. If the connection is accepted, the client will be notified with
* the CONN_ESTABLISHED event. If the timer expires before either of the
* above events (error or established), a TIMED_OUT event will be delivered
* to the client.
*
* the complicated part of the timer logic is the handling of race
* conditions with CM callbacks. we need to ensure that either the CM or
* the timer thread gets to deliver an event, but not both. when the
* CM callback is about to deliver an event, it always tries to cancel
* the outstanding timer. if cancel_timer indicates a that the timer is
* already being processed, the CM callback will simply return without
* delivering an event. when the timer thread executes, it tries to check
* if the EP is still in CONNECTING state (timers only work on the active
* side). if the EP is not in this state, the timer thread will return
* without delivering an event.
*/
/* ARGSUSED */
static int
daplka_ep_connect(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_ep_resource_t *ep_rp = NULL;
dapl_ep_connect_t args;
daplka_timer_info_t *timerp = NULL;
uint32_t old_state, new_state;
boolean_t timer_inserted = B_FALSE;
uint64_t timer_hkey = 0;
ibt_path_info_t path_info;
ibt_path_attr_t path_attr;
ibt_hca_attr_t *hca_attrp;
ibt_chan_open_args_t chan_args;
ibt_status_t status = IBT_SUCCESS;
uint8_t num_paths;
void *priv_data;
DAPL_PRIVATE *dp;
int retval = 0;
ib_gid_t *sgid;
ib_gid_t *dgid;
uint64_t dgid_ored;
ibt_ar_t ar_query_s;
ibt_ar_t ar_result_s;
ibt_path_flags_t pathflags;
D3("ep_connect: enter\n");
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_ep_connect_t),
mode);
if (retval != 0) {
DERR("ep_connect: copyin error %d\n", retval);
return (EFAULT);
}
ep_rp = (daplka_ep_resource_t *)
daplka_hash_lookup(&ia_rp->ia_ep_htbl, args.epc_hkey);
if (ep_rp == NULL) {
DERR("ep_connect: cannot find ep resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(ep_rp) == DAPL_TYPE_EP);
new_state = old_state = daplka_ep_get_state(ep_rp);
if (old_state != DAPLKA_EP_STATE_CLOSED) {
DERR("ep_connect: invalid state %d\n", old_state);
retval = EINVAL;
goto cleanup;
}
if (args.epc_priv_sz > DAPL_MAX_PRIVATE_DATA_SIZE) {
DERR("ep_connect: private data len (%d) exceeded "
"max size %d\n", args.epc_priv_sz,
DAPL_MAX_PRIVATE_DATA_SIZE);
retval = EINVAL;
goto cleanup;
}
/*
* check for remote ipaddress to dgid resolution needs ATS
*/
dgid = &args.epc_dgid;
dgid_ored = dgid->gid_guid | dgid->gid_prefix;
#if defined(DAPLKA_DEBUG_FORCE_ATS)
dgid_ored = 0ULL;
#endif /* DAPLKA_DEBUG_FORCE_ATS */
/* check for unidentified dgid */
if (dgid_ored == 0ULL) {
/*
* setup for ibt_query_ar()
*/
sgid = &ia_rp->ia_hca_sgid;
ar_query_s.ar_gid.gid_guid = 0ULL;
ar_query_s.ar_gid.gid_prefix = 0ULL;
ar_query_s.ar_pkey = 0;
bcopy(args.epc_raddr_sadata.iad_sadata,
ar_query_s.ar_data, DAPL_ATS_NBYTES);
#define UR(b) ar_query_s.ar_data[(b)]
D3("daplka_ep_connect: SA[8] %d.%d.%d.%d\n",
UR(8), UR(9), UR(10), UR(11));
D3("daplka_ep_connect: SA[12] %d.%d.%d.%d\n",
UR(12), UR(13), UR(14), UR(15));
status = ibt_query_ar(sgid, &ar_query_s, &ar_result_s);
if (status != IBT_SUCCESS) {
DERR("ep_connect: ibt_query_ar returned %d\n", status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
/*
* dgid identified from SA record
*/
dgid = &ar_result_s.ar_gid;
D2("daplka_ep_connect: ATS dgid=%llx:%llx\n",
(longlong_t)dgid->gid_prefix, (longlong_t)dgid->gid_guid);
}
bzero(&path_info, sizeof (ibt_path_info_t));
bzero(&path_attr, sizeof (ibt_path_attr_t));
bzero(&chan_args, sizeof (ibt_chan_open_args_t));
path_attr.pa_dgids = dgid;
path_attr.pa_num_dgids = 1;
/*
* don't set sid in path_attr saves 1 SA query
* Also makes server side not to write the service record
*/
path_attr.pa_sgid = ia_rp->ia_hca_sgid;
path_attr.pa_pkey = ia_rp->ia_port_pkey;
/* save the connection ep - struct copy */
ep_rp->ep_sgid = ia_rp->ia_hca_sgid;
ep_rp->ep_dgid = *dgid;
num_paths = 0;
pathflags = IBT_PATH_PKEY;
/* enable APM on remote port but not on loopback case */
if (daplka_apm && ((dgid->gid_prefix != path_attr.pa_sgid.gid_prefix) ||
(dgid->gid_guid != path_attr.pa_sgid.gid_guid))) {
pathflags |= IBT_PATH_APM;
}
status = ibt_get_paths(daplka_dev->daplka_clnt_hdl,
pathflags, &path_attr, 1, &path_info, &num_paths);
if (status != IBT_SUCCESS && status != IBT_INSUFF_DATA) {
DERR("ep_connect: ibt_get_paths returned %d paths %d\n",
status, num_paths);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
/* fill in the sid directly to path_info */
path_info.pi_sid = args.epc_sid;
hca_attrp = &ia_rp->ia_hca->hca_attr;
/* fill in open channel args */
chan_args.oc_path = &path_info;
chan_args.oc_cm_handler = daplka_cm_rc_handler;
chan_args.oc_cm_clnt_private = (void *)ep_rp;
chan_args.oc_rdma_ra_out = hca_attrp->hca_max_rdma_out_chan;
chan_args.oc_rdma_ra_in = hca_attrp->hca_max_rdma_in_chan;
chan_args.oc_path_retry_cnt = 7; /* 3-bit field */
chan_args.oc_path_rnr_retry_cnt = IBT_RNR_INFINITE_RETRY;
ASSERT(args.epc_priv_sz > 0);
priv_data = (void *)args.epc_priv;
chan_args.oc_priv_data_len = args.epc_priv_sz;
chan_args.oc_priv_data = priv_data;
/*
* calculate checksum value of hello message and
* put hello message in networking byte order
*/
dp = (DAPL_PRIVATE *)priv_data;
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*dp))
dp->hello_msg.hi_port = htons(dp->hello_msg.hi_port);
dp->hello_msg.hi_checksum = 0;
dp->hello_msg.hi_checksum = htons(daplka_hellomsg_cksum(dp));
_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*dp))
if (args.epc_timeout > 0) {
/*
* increment refcnt before passing reference to
* timer_info_alloc.
*/
DAPLKA_RS_REF(ep_rp);
timerp = daplka_timer_info_alloc(ep_rp);
if (timerp == NULL) {
DERR("ep_connect: cannot allocate timer\n");
/*
* we need to remove the reference if
* allocation failed.
*/
DAPLKA_RS_UNREF(ep_rp);
retval = ENOMEM;
goto cleanup;
}
/*
* We generate our own hkeys so that timer_hkey can fit
* into a pointer and passed as an arg to timeout()
*/
timer_hkey = (uint64_t)daplka_timer_hkey_gen();
retval = daplka_hash_insert(&daplka_timer_info_htbl,
&timer_hkey, (void *)timerp);
if (retval != 0) {
DERR("ep_connect: cannot insert timer info\n");
goto cleanup;
}
ASSERT(ep_rp->ep_timer_hkey == 0);
ep_rp->ep_timer_hkey = timer_hkey;
timer_inserted = B_TRUE;
D2("ep_connect: timer_hkey = 0x%llx\n",
(longlong_t)timer_hkey);
}
status = ibt_open_rc_channel(ep_rp->ep_chan_hdl, IBT_OCHAN_NO_FLAGS,
IBT_NONBLOCKING, &chan_args, NULL);
if (status != IBT_SUCCESS) {
DERR("ep_connect: ibt_open_rc_channel returned %d\n", status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
/*
* if a cm callback gets called at this point, it'll have to wait until
* ep_state becomes connecting (or some other state if another thread
* manages to get ahead of the callback). this guarantees that the
* callback will not touch the timer until it gets set.
*/
if (timerp != NULL) {
clock_t tmo;
tmo = drv_usectohz((clock_t)args.epc_timeout);
/*
* We generate our own 32 bit timer_hkey so that it can fit
* into a pointer
*/
ASSERT(timer_hkey != 0);
timerp->ti_tmo_id = timeout(daplka_timer_handler,
(void *)(uintptr_t)timer_hkey, tmo);
}
new_state = DAPLKA_EP_STATE_CONNECTING;
cleanup:;
if (timerp != NULL && (retval != 0 || status != IBT_SUCCESS)) {
/*
* if ibt_open_rc_channel failed, the timerp must still
* be in daplka_timer_info_htbl because neither the cm
* callback nor the timer_handler will be called.
*/
if (timer_inserted) {
daplka_timer_info_t *new_timerp = NULL;
ASSERT(timer_hkey != 0);
(void) daplka_hash_remove(&daplka_timer_info_htbl,
timer_hkey, (void **)&new_timerp);
ASSERT(new_timerp == timerp);
ep_rp->ep_timer_hkey = 0;
}
daplka_timer_info_free(timerp);
}
daplka_ep_set_state(ep_rp, old_state, new_state);
DAPLKA_RS_UNREF(ep_rp);
D3("ep_connect: exit\n");
return (retval);
}
/*
* ep_disconnect closes a connection with a remote peer.
* if a connection has not been established, ep_disconnect
* will instead flush all recv bufs posted to this channel.
* if the EP state is CONNECTED, CONNECTING or ACCEPTING upon
* entry to ep_disconnect, the EP state will transition to
* DISCONNECTING upon exit. the CM callbacks triggered by
* ibt_close_rc_channel will cause EP state to become
* DISCONNECTED. This function is a no-op if EP state is
* DISCONNECTED.
*/
/* ARGSUSED */
static int
daplka_ep_disconnect(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_ep_resource_t *ep_rp = NULL;
dapl_ep_disconnect_t args;
ibt_status_t status;
uint32_t old_state, new_state;
int retval = 0;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_ep_disconnect_t),
mode);
if (retval != 0) {
DERR("ep_disconnect: copyin error %d\n", retval);
return (EFAULT);
}
ep_rp = (daplka_ep_resource_t *)
daplka_hash_lookup(&ia_rp->ia_ep_htbl, args.epd_hkey);
if (ep_rp == NULL) {
DERR("ep_disconnect: cannot find ep resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(ep_rp) == DAPL_TYPE_EP);
new_state = old_state = daplka_ep_get_state(ep_rp);
if (old_state != DAPLKA_EP_STATE_CONNECTED &&
old_state != DAPLKA_EP_STATE_CONNECTING &&
old_state != DAPLKA_EP_STATE_ACCEPTING &&
old_state != DAPLKA_EP_STATE_DISCONNECTED &&
old_state != DAPLKA_EP_STATE_DISCONNECTING &&
old_state != DAPLKA_EP_STATE_CLOSED) {
DERR("ep_disconnect: invalid state %d\n", old_state);
retval = EINVAL;
goto cleanup;
}
if ((old_state == DAPLKA_EP_STATE_DISCONNECTED) ||
(old_state == DAPLKA_EP_STATE_DISCONNECTING)) {
D2("ep_disconnect: ep already disconnected\n");
retval = 0;
/* we leave the state as DISCONNECTED */
goto cleanup;
}
if (old_state == DAPLKA_EP_STATE_CONNECTING ||
old_state == DAPLKA_EP_STATE_ACCEPTING) {
D2("ep_disconnect: aborting, old_state = %d\n", old_state);
}
/*
* according to the udapl spec, ep_disconnect should
* flush the channel if the channel is not CONNECTED.
*/
if (old_state == DAPLKA_EP_STATE_CLOSED) {
status = ibt_flush_channel(ep_rp->ep_chan_hdl);
if (status != IBT_SUCCESS) {
DERR("ep_disconnect: ibt_flush_channel failed %d\n",
status);
*rvalp = (int)status;
}
retval = 0;
/* we leave the state as CLOSED */
goto cleanup;
}
new_state = DAPLKA_EP_STATE_DISCONNECTING;
daplka_ep_set_state(ep_rp, old_state, new_state);
status = ibt_close_rc_channel(ep_rp->ep_chan_hdl, IBT_NONBLOCKING,
NULL, 0, NULL, NULL, NULL);
if (status == IBT_SUCCESS) {
DAPLKA_RS_UNREF(ep_rp);
return (retval);
} else {
DERR("ep_disconnect: ibt_close_rc_channel returned %d\n",
status);
*rvalp = (int)status;
retval = 0;
new_state = old_state;
}
cleanup:;
daplka_ep_set_state(ep_rp, old_state, new_state);
DAPLKA_RS_UNREF(ep_rp);
return (retval);
}
/*
* this function resets the EP to a usable state (ie. from
* DISCONNECTED to CLOSED). this function is best implemented using
* the ibt_recycle_channel interface. until that is available, we will
* instead clone and tear down the existing channel and replace the
* existing channel with the cloned one.
*/
/* ARGSUSED */
static int
daplka_ep_reinit(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_ep_resource_t *ep_rp = NULL;
dapl_ep_reinit_t args;
ibt_status_t status;
uint32_t old_state, new_state;
int retval = 0;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_ep_reinit_t),
mode);
if (retval != 0) {
DERR("reinit: copyin error %d\n", retval);
return (EFAULT);
}
ep_rp = (daplka_ep_resource_t *)
daplka_hash_lookup(&ia_rp->ia_ep_htbl, args.epri_hkey);
if (ep_rp == NULL) {
DERR("reinit: cannot find ep resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(ep_rp) == DAPL_TYPE_EP);
new_state = old_state = daplka_ep_get_state(ep_rp);
if ((old_state != DAPLKA_EP_STATE_CLOSED) &&
(old_state != DAPLKA_EP_STATE_DISCONNECTED)) {
DERR("reinit: invalid state %d\n", old_state);
retval = EINVAL;
goto cleanup;
}
status = ibt_recycle_rc(ep_rp->ep_chan_hdl,
IBT_CEP_RDMA_RD|IBT_CEP_RDMA_WR,
ia_rp->ia_port_num, NULL, NULL);
if (status != IBT_SUCCESS) {
DERR("reinit: unable to clone channel\n");
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
new_state = DAPLKA_EP_STATE_CLOSED;
cleanup:;
daplka_ep_set_state(ep_rp, old_state, new_state);
DAPLKA_RS_UNREF(ep_rp);
return (retval);
}
/*
* destroys a EP resource.
* called when refcnt drops to zero.
*/
static int
daplka_ep_destroy(daplka_resource_t *gen_rp)
{
daplka_ep_resource_t *ep_rp = (daplka_ep_resource_t *)gen_rp;
ibt_status_t status;
ASSERT(DAPLKA_RS_REFCNT(ep_rp) == 0);
ASSERT(ep_rp->ep_state == DAPLKA_EP_STATE_FREED);
/*
* by the time we get here, we can be sure that
* there is no outstanding timer.
*/
ASSERT(ep_rp->ep_timer_hkey == 0);
D3("ep_destroy: entering, ep_rp 0x%p, rnum %d\n",
ep_rp, DAPLKA_RS_RNUM(ep_rp));
/*
* free rc channel
*/
if (ep_rp->ep_chan_hdl != NULL) {
mutex_enter(&daplka_dev->daplka_mutex);
ibt_set_chan_private(ep_rp->ep_chan_hdl, NULL);
mutex_exit(&daplka_dev->daplka_mutex);
status = daplka_ibt_free_channel(ep_rp, ep_rp->ep_chan_hdl);
if (status != IBT_SUCCESS) {
DERR("ep_free: ibt_free_channel returned %d\n",
status);
}
ep_rp->ep_chan_hdl = NULL;
D3("ep_destroy: qp freed, rnum %d\n", DAPLKA_RS_RNUM(ep_rp));
}
/*
* release all references
*/
if (ep_rp->ep_snd_evd != NULL) {
DAPLKA_RS_UNREF(ep_rp->ep_snd_evd);
ep_rp->ep_snd_evd = NULL;
}
if (ep_rp->ep_rcv_evd != NULL) {
DAPLKA_RS_UNREF(ep_rp->ep_rcv_evd);
ep_rp->ep_rcv_evd = NULL;
}
if (ep_rp->ep_conn_evd != NULL) {
DAPLKA_RS_UNREF(ep_rp->ep_conn_evd);
ep_rp->ep_conn_evd = NULL;
}
if (ep_rp->ep_srq_res != NULL) {
DAPLKA_RS_UNREF(ep_rp->ep_srq_res);
ep_rp->ep_srq_res = NULL;
}
if (ep_rp->ep_pd_res != NULL) {
DAPLKA_RS_UNREF(ep_rp->ep_pd_res);
ep_rp->ep_pd_res = NULL;
}
cv_destroy(&ep_rp->ep_cv);
mutex_destroy(&ep_rp->ep_lock);
DAPLKA_RS_FINI(ep_rp);
kmem_free(ep_rp, sizeof (daplka_ep_resource_t));
D3("ep_destroy: exiting, ep_rp 0x%p\n", ep_rp);
return (0);
}
/*
* this function is called by daplka_hash_destroy for
* freeing EP resource objects
*/
static void
daplka_hash_ep_free(void *obj)
{
daplka_ep_resource_t *ep_rp = (daplka_ep_resource_t *)obj;
ibt_status_t status;
uint32_t old_state, new_state;
int retval;
old_state = daplka_ep_get_state(ep_rp);
retval = daplka_cancel_timer(ep_rp);
new_state = DAPLKA_EP_STATE_FREED;
daplka_ep_set_state(ep_rp, old_state, new_state);
if (retval != 0) {
D2("hash_ep_free: ep_rp 0x%p "
"timer is still being processed\n", ep_rp);
mutex_enter(&ep_rp->ep_lock);
if (ep_rp->ep_timer_hkey != 0) {
D2("hash_ep_free: ep_rp 0x%p "
"waiting for timer_hkey to be 0\n", ep_rp);
cv_wait(&ep_rp->ep_cv, &ep_rp->ep_lock);
}
mutex_exit(&ep_rp->ep_lock);
}
/* call ibt_close_rc_channel regardless of what state we are in */
status = ibt_close_rc_channel(ep_rp->ep_chan_hdl, IBT_BLOCKING,
NULL, 0, NULL, NULL, NULL);
if (status != IBT_SUCCESS) {
if (old_state == DAPLKA_EP_STATE_CONNECTED ||
old_state == DAPLKA_EP_STATE_CONNECTING ||
old_state == DAPLKA_EP_STATE_ACCEPTING) {
DERR("hash_ep_free: ep_rp 0x%p state %d "
"unexpected error %d from close_rc_channel\n",
ep_rp, old_state, status);
}
D2("hash_ep_free: close_rc_channel, status %d\n", status);
}
DAPLKA_RS_UNREF(ep_rp);
}
/*
* creates a EVD resource.
* a EVD is used by the client to wait for events from one
* or more sources.
*/
/* ARGSUSED */
static int
daplka_evd_create(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_evd_resource_t *evd_rp = NULL;
daplka_async_evd_hkey_t *async_evd;
ibt_hca_attr_t *hca_attrp;
ibt_cq_attr_t cq_attr;
dapl_evd_create_t args;
uint64_t evd_hkey = 0;
boolean_t inserted = B_FALSE;
int retval = 0;
ibt_status_t status;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_evd_create_t),
mode);
if (retval != 0) {
DERR("evd_create: copyin error %d", retval);
return (EFAULT);
}
if ((args.evd_flags &
~(DAT_EVD_DEFAULT_FLAG | DAT_EVD_SOFTWARE_FLAG)) != 0) {
DERR("evd_create: invalid flags 0x%x\n", args.evd_flags);
return (EINVAL);
}
evd_rp = kmem_zalloc(sizeof (daplka_evd_resource_t), daplka_km_flags);
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*evd_rp))
DAPLKA_RS_INIT(evd_rp, DAPL_TYPE_EVD,
DAPLKA_RS_RNUM(ia_rp), daplka_evd_destroy);
mutex_init(&evd_rp->evd_lock, NULL, MUTEX_DRIVER, NULL);
cv_init(&evd_rp->evd_cv, NULL, CV_DRIVER, NULL);
evd_rp->evd_hca = ia_rp->ia_hca;
evd_rp->evd_flags = args.evd_flags;
evd_rp->evd_hca_hdl = ia_rp->ia_hca_hdl;
evd_rp->evd_cookie = args.evd_cookie;
evd_rp->evd_cno_res = NULL;
evd_rp->evd_cr_events.eel_event_type = DAPLKA_EVD_CM_EVENTS;
evd_rp->evd_conn_events.eel_event_type = DAPLKA_EVD_CM_EVENTS;
evd_rp->evd_async_events.eel_event_type = DAPLKA_EVD_ASYNC_EVENTS;
/*
* if the client specified a non-zero cno_hkey, we
* lookup the cno and save the reference for later use.
*/
if (args.evd_cno_hkey > 0) {
daplka_cno_resource_t *cno_rp;
cno_rp = (daplka_cno_resource_t *)
daplka_hash_lookup(&ia_rp->ia_cno_htbl,
args.evd_cno_hkey);
if (cno_rp == NULL) {
DERR("evd_create: cannot find cno resource\n");
goto cleanup;
}
ASSERT(DAPLKA_RS_TYPE(cno_rp) == DAPL_TYPE_CNO);
evd_rp->evd_cno_res = cno_rp;
}
hca_attrp = &ia_rp->ia_hca->hca_attr;
if ((evd_rp->evd_flags &
(DAT_EVD_DTO_FLAG | DAT_EVD_RMR_BIND_FLAG)) != 0) {
if (args.evd_cq_size > hca_attrp->hca_max_cq_sz) {
DERR("evd_create: invalid cq size %d",
args.evd_cq_size);
retval = EINVAL;
goto cleanup;
}
cq_attr.cq_size = args.evd_cq_size;
cq_attr.cq_sched = NULL;
cq_attr.cq_flags = IBT_CQ_USER_MAP;
status = daplka_ibt_alloc_cq(evd_rp, evd_rp->evd_hca_hdl,
&cq_attr, &evd_rp->evd_cq_hdl, &evd_rp->evd_cq_real_size);
if (status != IBT_SUCCESS) {
DERR("evd_create: ibt_alloc_cq returned %d", status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
/*
* store evd ptr with cq_hdl
* mutex is only needed for race of "destroy" and "async"
*/
mutex_enter(&daplka_dev->daplka_mutex);
ibt_set_cq_private(evd_rp->evd_cq_hdl, (void *)evd_rp);
mutex_exit(&daplka_dev->daplka_mutex);
/* Get HCA-specific data_out info */
status = ibt_ci_data_out(evd_rp->evd_hca_hdl,
IBT_CI_NO_FLAGS, IBT_HDL_CQ, (void *)evd_rp->evd_cq_hdl,
&args.evd_cq_data_out, sizeof (args.evd_cq_data_out));
if (status != IBT_SUCCESS) {
DERR("evd_create: ibt_ci_data_out error(%d)", status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
args.evd_cq_real_size = evd_rp->evd_cq_real_size;
ibt_set_cq_handler(evd_rp->evd_cq_hdl, daplka_cq_handler,
(void *)evd_rp);
}
retval = daplka_hash_insert(&ia_rp->ia_evd_htbl,
&evd_hkey, (void *)evd_rp);
if (retval != 0) {
DERR("evd_ceate: cannot insert evd %d\n", retval);
goto cleanup;
}
inserted = B_TRUE;
_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*evd_rp))
/*
* If this evd handles async events need to add to the IA resource
* async evd list
*/
if (evd_rp->evd_flags & DAT_EVD_ASYNC_FLAG) {
async_evd = kmem_zalloc(sizeof (daplka_async_evd_hkey_t),
daplka_km_flags);
/* add the evd to the head of the list */
mutex_enter(&ia_rp->ia_lock);
async_evd->aeh_evd_hkey = evd_hkey;
async_evd->aeh_next = ia_rp->ia_async_evd_hkeys;
ia_rp->ia_async_evd_hkeys = async_evd;
mutex_exit(&ia_rp->ia_lock);
}
args.evd_hkey = evd_hkey;
retval = copyout(&args, (void *)arg, sizeof (dapl_evd_create_t));
if (retval != 0) {
DERR("evd_create: copyout error %d\n", retval);
retval = EFAULT;
goto cleanup;
}
return (0);
cleanup:;
if (inserted) {
daplka_evd_resource_t *free_rp = NULL;
(void) daplka_hash_remove(&ia_rp->ia_evd_htbl, evd_hkey,
(void **)&free_rp);
if (free_rp != evd_rp) {
DERR("evd_create: cannot remove evd\n");
/*
* we can only get here if another thread
* has completed the cleanup in evd_free
*/
return (retval);
}
}
DAPLKA_RS_UNREF(evd_rp);
return (retval);
}
/*
* resizes CQ and returns new mapping info to library.
*/
/* ARGSUSED */
static int
daplka_cq_resize(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_evd_resource_t *evd_rp = NULL;
ibt_hca_attr_t *hca_attrp;
dapl_cq_resize_t args;
ibt_status_t status;
int retval = 0;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_cq_resize_t),
mode);
if (retval != 0) {
DERR("cq_resize: copyin error %d\n", retval);
return (EFAULT);
}
/* get evd resource */
evd_rp = (daplka_evd_resource_t *)
daplka_hash_lookup(&ia_rp->ia_evd_htbl, args.cqr_evd_hkey);
if (evd_rp == NULL) {
DERR("cq_resize: cannot find evd resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(evd_rp) == DAPL_TYPE_EVD);
hca_attrp = &ia_rp->ia_hca->hca_attr;
if (args.cqr_cq_new_size > hca_attrp->hca_max_cq_sz) {
DERR("cq_resize: invalid cq size %d", args.cqr_cq_new_size);
retval = EINVAL;
goto cleanup;
}
/*
* If ibt_resize_cq fails that it is primarily due to resource
* shortage. Per IB spec resize will never loose events and
* a resize error leaves the CQ intact. Therefore even if the
* resize request fails we proceed and get the mapping data
* from the CQ so that the library can mmap it.
*/
status = ibt_resize_cq(evd_rp->evd_cq_hdl, args.cqr_cq_new_size,
&args.cqr_cq_real_size);
if (status != IBT_SUCCESS) {
/* we return the size of the old CQ if resize fails */
args.cqr_cq_real_size = evd_rp->evd_cq_real_size;
ASSERT(status != IBT_CQ_HDL_INVALID);
DERR("cq_resize: ibt_resize_cq failed:%d\n", status);
} else {
mutex_enter(&evd_rp->evd_lock);
evd_rp->evd_cq_real_size = args.cqr_cq_real_size;
mutex_exit(&evd_rp->evd_lock);
}
D2("cq_resize(%d): done new_sz(%u) real_sz(%u)\n",
DAPLKA_RS_RNUM(evd_rp),
args.cqr_cq_new_size, args.cqr_cq_real_size);
/* Get HCA-specific data_out info */
status = ibt_ci_data_out(evd_rp->evd_hca_hdl,
IBT_CI_NO_FLAGS, IBT_HDL_CQ, (void *)evd_rp->evd_cq_hdl,
&args.cqr_cq_data_out, sizeof (args.cqr_cq_data_out));
if (status != IBT_SUCCESS) {
DERR("cq_resize: ibt_ci_data_out error(%d)\n", status);
/* return ibt_ci_data_out status */
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
retval = ddi_copyout(&args, (void *)arg, sizeof (dapl_cq_resize_t),
mode);
if (retval != 0) {
DERR("cq_resize: copyout error %d\n", retval);
retval = EFAULT;
goto cleanup;
}
cleanup:;
if (evd_rp != NULL) {
DAPLKA_RS_UNREF(evd_rp);
}
return (retval);
}
/*
* Routine to copyin the event poll message so that 32 bit libraries
* can be safely supported
*/
int
daplka_event_poll_copyin(intptr_t inarg, dapl_event_poll_t *outarg, int mode)
{
int retval;
#ifdef _MULTI_DATAMODEL
if ((mode & DATAMODEL_MASK) == DATAMODEL_ILP32) {
dapl_event_poll32_t args32;
retval = ddi_copyin((void *)inarg, &args32,
sizeof (dapl_event_poll32_t), mode);
if (retval != 0) {
DERR("event_poll_copyin: 32bit error %d\n", retval);
return (EFAULT);
}
outarg->evp_evd_hkey = args32.evp_evd_hkey;
outarg->evp_threshold = args32.evp_threshold;
outarg->evp_timeout = args32.evp_timeout;
outarg->evp_ep = (dapl_ib_event_t *)(uintptr_t)args32.evp_ep;
outarg->evp_num_ev = args32.evp_num_ev;
outarg->evp_num_polled = args32.evp_num_polled;
return (0);
}
#endif
retval = ddi_copyin((void *)inarg, outarg, sizeof (dapl_event_poll_t),
mode);
if (retval != 0) {
DERR("event_poll: copyin error %d\n", retval);
return (EFAULT);
}
return (0);
}
/*
* Routine to copyout the event poll message so that 32 bit libraries
* can be safely supported
*/
int
daplka_event_poll_copyout(dapl_event_poll_t *inarg, intptr_t outarg, int mode)
{
int retval;
#ifdef _MULTI_DATAMODEL
if ((mode & DATAMODEL_MASK) == DATAMODEL_ILP32) {
dapl_event_poll32_t args32;
args32.evp_evd_hkey = inarg->evp_evd_hkey;
args32.evp_threshold = inarg->evp_threshold;
args32.evp_timeout = inarg->evp_timeout;
args32.evp_ep = (caddr32_t)(uintptr_t)inarg->evp_ep;
args32.evp_num_ev = inarg->evp_num_ev;
args32.evp_num_polled = inarg->evp_num_polled;
retval = ddi_copyout((void *)&args32, (void *)outarg,
sizeof (dapl_event_poll32_t), mode);
if (retval != 0) {
DERR("event_poll_copyout: 32bit error %d\n", retval);
return (EFAULT);
}
return (0);
}
#endif
retval = ddi_copyout((void *)inarg, (void *)outarg,
sizeof (dapl_event_poll_t), mode);
if (retval != 0) {
DERR("event_poll_copyout: error %d\n", retval);
return (EFAULT);
}
return (0);
}
/*
* fucntion to handle CM REQ RCV private data from Solaris or third parties
*/
/* ARGSUSED */
static void
daplka_crevent_privdata_post(daplka_ia_resource_t *ia_rp,
dapl_ib_event_t *evd_rp, daplka_evd_event_t *cr_ev)
{
DAPL_PRIVATE *dp;
ib_gid_t *lgid;
ibt_ar_t ar_query_s;
ibt_ar_t ar_result_s;
DAPL_HELLO_MSG *hip;
uint32_t ipaddr_ord;
ibt_priv_data_len_t clen;
ibt_priv_data_len_t olen;
ibt_status_t status;
uint16_t cksum;
/*
* get private data and len
*/
dp = (DAPL_PRIVATE *)cr_ev->ee_cmev.ec_cm_ev_priv_data;
clen = cr_ev->ee_cmev.ec_cm_ev_priv_data_len;
#if defined(DAPLKA_DEBUG_FORCE_ATS)
/* skip the DAPL_PRIVATE chekcsum check */
#else
/* for remote connects */
/* look up hello message in the CM private data area */
if (clen >= sizeof (DAPL_PRIVATE) &&
(dp->hello_msg.hi_vers == DAPL_HELLO_MSG_VERS)) {
cksum = ntohs(dp->hello_msg.hi_checksum);
dp->hello_msg.hi_checksum = 0;
if (daplka_hellomsg_cksum(dp) == cksum) {
D2("daplka_crevent_privdata_post: Solaris msg\n");
evd_rp->ibe_ce.ibce_priv_data_size = clen;
dp->hello_msg.hi_checksum = DAPL_CHECKSUM;
dp->hello_msg.hi_port = ntohs(dp->hello_msg.hi_port);
bcopy(dp, evd_rp->ibe_ce.ibce_priv_data_ptr, clen);
kmem_free(dp, clen);
return;
}
}
#endif /* DAPLKA_DEBUG_FORCE_ATS */
D2("daplka_crevent_privdata_post: 3rd party msg\n");
/* transpose CM private data into hello message */
if (clen) {
olen = clen;
if (clen > DAPL_CONSUMER_MAX_PRIVATE_DATA_SIZE) {
clen = DAPL_CONSUMER_MAX_PRIVATE_DATA_SIZE;
}
bcopy(dp, evd_rp->ibe_ce.ibce_priv_data_ptr, clen);
kmem_free(dp, olen);
} else {
bzero(evd_rp->ibe_ce.ibce_priv_data_ptr,
DAPL_CONSUMER_MAX_PRIVATE_DATA_SIZE);
}
evd_rp->ibe_ce.ibce_priv_data_size = sizeof (DAPL_PRIVATE);
dp = (DAPL_PRIVATE *)evd_rp->ibe_ce.ibce_priv_data_ptr;
/*
* fill in hello message
*/
hip = &dp->hello_msg;
hip->hi_checksum = DAPL_CHECKSUM;
hip->hi_clen = clen;
hip->hi_mid = 0;
hip->hi_vers = DAPL_HELLO_MSG_VERS;
hip->hi_port = 0;
/* assign sgid and dgid */
lgid = &ia_rp->ia_hca_sgid;
ar_query_s.ar_gid.gid_prefix =
cr_ev->ee_cmev.ec_cm_req_prim_addr.gid_prefix;
ar_query_s.ar_gid.gid_guid =
cr_ev->ee_cmev.ec_cm_req_prim_addr.gid_guid;
ar_query_s.ar_pkey = ia_rp->ia_port_pkey;
bzero(ar_query_s.ar_data, DAPL_ATS_NBYTES);
/* reverse ip address lookup through ATS */
status = ibt_query_ar(lgid, &ar_query_s, &ar_result_s);
if (status == IBT_SUCCESS) {
bcopy(ar_result_s.ar_data, hip->hi_saaddr, DAPL_ATS_NBYTES);
/* determine the address families */
ipaddr_ord = hip->hi_v4pad[0] | hip->hi_v4pad[1] |
hip->hi_v4pad[2];
if (ipaddr_ord == 0) {
hip->hi_ipv = AF_INET;
} else {
hip->hi_ipv = AF_INET6;
}
#define UL(b) ar_result_s.ar_data[(b)]
D3("daplka_privdata_post: family=%d :SA[8] %d.%d.%d.%d\n",
hip->hi_ipv, UL(8), UL(9), UL(10), UL(11));
D3("daplka_privdata_post: SA[12] %d.%d.%d.%d\n",
UL(12), UL(13), UL(14), UL(15));
} else {
/* non-conformed third parties */
hip->hi_ipv = AF_UNSPEC;
bzero(hip->hi_saaddr, DAPL_ATS_NBYTES);
}
}
/*
* this function is called by evd_wait and evd_dequeue to wait for
* connection events and CQ notifications. typically this function
* is called when the userland CQ is empty and the client has
* specified a non-zero timeout to evd_wait. if the client is
* interested in CQ events, the CQ must be armed in userland prior
* to calling this function.
*/
/* ARGSUSED */
static int
daplka_event_poll(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_evd_resource_t *evd_rp = NULL;
dapl_event_poll_t args;
daplka_evd_event_t *head;
dapl_ib_event_t evp_arr[NUM_EVENTS_PER_POLL];
dapl_ib_event_t *evp;
dapl_ib_event_t *evp_start;
size_t evp_size;
int threshold;
clock_t timeout;
uint32_t max_events;
uint32_t num_events = 0;
void *pd;
ibt_priv_data_len_t n;
int retval = 0;
int rc;
retval = daplka_event_poll_copyin(arg, &args, mode);
if (retval != 0) {
return (EFAULT);
}
if ((args.evp_num_ev > 0) && (args.evp_ep == NULL)) {
DERR("event_poll: evp_ep cannot be NULL if num_wc=%d",
args.evp_num_ev);
return (EINVAL);
}
/*
* Note: dequeue requests have a threshold = 0, timeout = 0
*/
threshold = args.evp_threshold;
max_events = args.evp_num_ev;
/* ensure library is passing sensible values */
if (max_events < threshold) {
DERR("event_poll: max_events(%d) < threshold(%d)\n",
max_events, threshold);
return (EINVAL);
}
/* Do a sanity check to avoid excessive memory allocation */
if (max_events > DAPL_EVD_MAX_EVENTS) {
DERR("event_poll: max_events(%d) > %d",
max_events, DAPL_EVD_MAX_EVENTS);
return (EINVAL);
}
D4("event_poll: threshold(%d) timeout(0x%llx) max_events(%d)\n",
threshold, (longlong_t)args.evp_timeout, max_events);
/* get evd resource */
evd_rp = (daplka_evd_resource_t *)
daplka_hash_lookup(&ia_rp->ia_evd_htbl, args.evp_evd_hkey);
if (evd_rp == NULL) {
DERR("event_poll: cannot find evd resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(evd_rp) == DAPL_TYPE_EVD);
/*
* Use event array on the stack if possible
*/
if (max_events <= NUM_EVENTS_PER_POLL) {
evp_start = evp = &evp_arr[0];
} else {
evp_size = max_events * sizeof (dapl_ib_event_t);
evp_start = evp = kmem_zalloc(evp_size, daplka_km_flags);
if (evp == NULL) {
DERR("event_poll: kmem_zalloc failed, evp_size %d",
evp_size);
retval = ENOMEM;
goto cleanup;
}
}
/*
* The Event poll algorithm is as follows -
* The library passes a buffer big enough to hold "max_events"
* events. max_events is >= threshold. If at any stage we get
* max_events no. of events we bail. The events are polled in
* the following order -
* 1) Check for CR events in the evd_cr_events list
* 2) Check for Connection events in the evd_connection_events list
*
* If after the above 2 steps we don't have enough(>= threshold) events
* we block for CQ notification and sleep. Upon being woken up we start
* at step 1 again.
*/
/*
* Note: this could be 0 or INFINITE or anyother value in microsec
*/
if (args.evp_timeout > 0) {
if (args.evp_timeout >= LONG_MAX) {
timeout = LONG_MAX;
} else {
clock_t curr_time = ddi_get_lbolt();
timeout = curr_time +
drv_usectohz((clock_t)args.evp_timeout);
/*
* use the max value if we wrapped around
*/
if (timeout <= curr_time) {
timeout = LONG_MAX;
}
}
} else {
timeout = 0;
}
mutex_enter(&evd_rp->evd_lock);
for (;;) {
/*
* If this evd is waiting for CM events check that now.
*/
if ((evd_rp->evd_flags & DAT_EVD_CR_FLAG) &&
(evd_rp->evd_cr_events.eel_num_elements > 0)) {
/* dequeue events from evd_cr_events list */
while (head = daplka_evd_event_dequeue(
&evd_rp->evd_cr_events)) {
/*
* populate the evp array
*/
evp[num_events].ibe_ev_family = DAPL_CR_EVENTS;
evp[num_events].ibe_ce.ibce_event =
head->ee_cmev.ec_cm_ev_type;
evp[num_events].ibe_ce.ibce_cookie =
(uint64_t)head->ee_cmev.ec_cm_cookie;
evp[num_events].ibe_ce.ibce_psep_cookie =
head->ee_cmev.ec_cm_psep_cookie;
daplka_crevent_privdata_post(ia_rp,
&evp[num_events], head);
kmem_free(head, sizeof (daplka_evd_event_t));
if (++num_events == max_events) {
mutex_exit(&evd_rp->evd_lock);
goto maxevent_reached;
}
}
}
if ((evd_rp->evd_flags & DAT_EVD_CONNECTION_FLAG) &&
(evd_rp->evd_conn_events.eel_num_elements > 0)) {
/* dequeue events from evd_connection_events list */
while ((head = daplka_evd_event_dequeue
(&evd_rp->evd_conn_events))) {
/*
* populate the evp array -
*
*/
if (head->ee_cmev.ec_cm_is_passive) {
evp[num_events].ibe_ev_family =
DAPL_PASSIVE_CONNECTION_EVENTS;
} else {
evp[num_events].ibe_ev_family =
DAPL_ACTIVE_CONNECTION_EVENTS;
}
evp[num_events].ibe_ce.ibce_event =
head->ee_cmev.ec_cm_ev_type;
evp[num_events].ibe_ce.ibce_cookie =
(uint64_t)head->ee_cmev.ec_cm_cookie;
evp[num_events].ibe_ce.ibce_psep_cookie =
head->ee_cmev.ec_cm_psep_cookie;
if (head->ee_cmev.ec_cm_ev_priv_data_len > 0) {
pd = head->ee_cmev.ec_cm_ev_priv_data;
n = head->
ee_cmev.ec_cm_ev_priv_data_len;
bcopy(pd, (void *)evp[num_events].
ibe_ce.ibce_priv_data_ptr, n);
evp[num_events].ibe_ce.
ibce_priv_data_size = n;
kmem_free(pd, n);
}
kmem_free(head, sizeof (daplka_evd_event_t));
if (++num_events == max_events) {
mutex_exit(&evd_rp->evd_lock);
goto maxevent_reached;
}
}
}
if ((evd_rp->evd_flags & DAT_EVD_ASYNC_FLAG) &&
(evd_rp->evd_async_events.eel_num_elements > 0)) {
/* dequeue events from evd_async_events list */
while (head = daplka_evd_event_dequeue(
&evd_rp->evd_async_events)) {
/*
* populate the evp array
*/
evp[num_events].ibe_ev_family =
DAPL_ASYNC_EVENTS;
evp[num_events].ibe_async.ibae_type =
head->ee_aev.ibae_type;
evp[num_events].ibe_async.ibae_hca_guid =
head->ee_aev.ibae_hca_guid;
evp[num_events].ibe_async.ibae_cookie =
head->ee_aev.ibae_cookie;
evp[num_events].ibe_async.ibae_port =
head->ee_aev.ibae_port;
kmem_free(head, sizeof (daplka_evd_event_t));
if (++num_events == max_events) {
break;
}
}
}
/*
* We have sufficient events for this call so no need to wait
*/
if ((threshold > 0) && (num_events >= threshold)) {
mutex_exit(&evd_rp->evd_lock);
break;
}
evd_rp->evd_waiters++;
/*
* There are no new events and a timeout was specified.
* Note: for CQ events threshold is 0 but timeout is
* not necessarily 0.
*/
while ((evd_rp->evd_newevents == DAPLKA_EVD_NO_EVENTS) &&
timeout) {
retval = DAPLKA_EVD_WAIT(&evd_rp->evd_cv,
&evd_rp->evd_lock, timeout);
if (retval == 0) {
retval = EINTR;
break;
} else if (retval == -1) {
retval = ETIME;
break;
} else {
retval = 0;
continue;
}
}
evd_rp->evd_waiters--;
if (evd_rp->evd_newevents != DAPLKA_EVD_NO_EVENTS) {
/*
* If we got woken up by the CQ handler due to events
* in the CQ. Need to go to userland to check for
* CQ events. Or if we were woken up due to S/W events
*/
/* check for userland events only */
if (!(evd_rp->evd_newevents &
~DAPLKA_EVD_ULAND_EVENTS)) {
evd_rp->evd_newevents = DAPLKA_EVD_NO_EVENTS;
mutex_exit(&evd_rp->evd_lock);
break;
}
/*
* Clear newevents since we are going to loopback
* back and check for both CM and CQ events
*/
evd_rp->evd_newevents = DAPLKA_EVD_NO_EVENTS;
} else { /* error */
mutex_exit(&evd_rp->evd_lock);
break;
}
}
maxevent_reached:
args.evp_num_polled = num_events;
/*
* At this point retval might have a value that we want to return
* back to the user. So the copyouts shouldn't tamper retval.
*/
if (args.evp_num_polled > 0) { /* copyout the events */
rc = ddi_copyout(evp, args.evp_ep, args.evp_num_polled *
sizeof (dapl_ib_event_t), mode);
if (rc != 0) { /* XXX: we are losing events here */
DERR("event_poll: event array copyout error %d", rc);
retval = EFAULT;
goto cleanup;
}
rc = daplka_event_poll_copyout(&args, arg, mode);
if (rc != 0) { /* XXX: we are losing events here */
DERR("event_poll: copyout error %d\n", rc);
retval = EFAULT;
goto cleanup;
}
}
cleanup:;
if ((max_events > NUM_EVENTS_PER_POLL) && (evp_start != NULL)) {
kmem_free(evp_start, evp_size);
}
if (evd_rp != NULL) {
DAPLKA_RS_UNREF(evd_rp);
}
return (retval);
}
/* ARGSUSED */
static int
daplka_event_wakeup(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
dapl_event_wakeup_t args;
daplka_evd_resource_t *evd_rp;
int retval;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_event_wakeup_t),
mode);
if (retval != 0) {
DERR("event_wakeup: copyin error %d\n", retval);
return (EFAULT);
}
/* get evd resource */
evd_rp = (daplka_evd_resource_t *)
daplka_hash_lookup(&ia_rp->ia_evd_htbl, args.evw_hkey);
if (evd_rp == NULL) {
DERR("event_wakeup: cannot find evd resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(evd_rp) == DAPL_TYPE_EVD);
daplka_evd_wakeup(evd_rp, NULL, NULL);
DAPLKA_RS_UNREF(evd_rp);
return (retval);
}
/* ARGSUSED */
static int
daplka_evd_modify_cno(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
dapl_evd_modify_cno_t args;
daplka_evd_resource_t *evd_rp;
daplka_cno_resource_t *cno_rp;
daplka_cno_resource_t *old_cno_rp;
int retval;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_evd_modify_cno_t),
mode);
if (retval != 0) {
DERR("evd_modify_cno: copyin error %d\n", retval);
return (EFAULT);
}
/* get evd resource */
evd_rp = (daplka_evd_resource_t *)
daplka_hash_lookup(&ia_rp->ia_evd_htbl, args.evmc_hkey);
if (evd_rp == NULL) {
DERR("evd_modify_cno: cannot find evd resource\n");
retval = EINVAL;
goto cleanup;
}
ASSERT(DAPLKA_RS_TYPE(evd_rp) == DAPL_TYPE_EVD);
if (args.evmc_cno_hkey > 0) {
/* get cno resource corresponding to the new CNO */
cno_rp = (daplka_cno_resource_t *)
daplka_hash_lookup(&ia_rp->ia_cno_htbl,
args.evmc_cno_hkey);
if (cno_rp == NULL) {
DERR("evd_modify_cno: cannot find CNO resource\n");
retval = EINVAL;
goto cleanup;
}
ASSERT(DAPLKA_RS_TYPE(cno_rp) == DAPL_TYPE_CNO);
} else {
cno_rp = NULL;
}
mutex_enter(&evd_rp->evd_lock);
old_cno_rp = evd_rp->evd_cno_res;
evd_rp->evd_cno_res = cno_rp;
mutex_exit(&evd_rp->evd_lock);
/*
* drop the refcnt on the old CNO, the refcnt on the new CNO is
* retained since the evd holds a reference to it.
*/
if (old_cno_rp) {
DAPLKA_RS_UNREF(old_cno_rp);
}
cleanup:
if (evd_rp) {
DAPLKA_RS_UNREF(evd_rp);
}
return (retval);
}
/*
* Frees the EVD and associated resources.
* If there are other threads still using this EVD, the destruction
* will defer until the EVD's refcnt drops to zero.
*/
/* ARGSUSED */
static int
daplka_evd_free(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_evd_resource_t *evd_rp = NULL;
daplka_async_evd_hkey_t *curr;
daplka_async_evd_hkey_t *prev;
dapl_evd_free_t args;
int retval = 0;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_evd_free_t), mode);
if (retval != 0) {
DERR("evd_free: copyin error %d\n", retval);
return (EFAULT);
}
retval = daplka_hash_remove(&ia_rp->ia_evd_htbl, args.evf_hkey,
(void **)&evd_rp);
if (retval != 0 || evd_rp == NULL) {
DERR("evd_free: cannot find evd resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(evd_rp) == DAPL_TYPE_EVD);
/* If this is an async evd remove it from the IA's async evd list */
if (evd_rp->evd_flags & DAT_EVD_ASYNC_FLAG) {
mutex_enter(&ia_rp->ia_lock);
curr = prev = ia_rp->ia_async_evd_hkeys;
while (curr != NULL) {
if (curr->aeh_evd_hkey == args.evf_hkey) {
/* unlink curr from the list */
if (curr == prev) {
/*
* if first element in the list update
* the list head
*/
ia_rp->ia_async_evd_hkeys =
curr->aeh_next;
} else {
prev->aeh_next = curr->aeh_next;
}
break;
}
prev = curr;
curr = curr->aeh_next;
}
mutex_exit(&ia_rp->ia_lock);
/* free the curr entry */
kmem_free(curr, sizeof (daplka_async_evd_hkey_t));
}
/* UNREF calls the actual free function when refcnt is zero */
DAPLKA_RS_UNREF(evd_rp);
return (0);
}
/*
* destroys EVD resource.
* called when refcnt drops to zero.
*/
static int
daplka_evd_destroy(daplka_resource_t *gen_rp)
{
daplka_evd_resource_t *evd_rp = (daplka_evd_resource_t *)gen_rp;
ibt_status_t status;
daplka_evd_event_t *evt;
ibt_priv_data_len_t len;
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*evd_rp))
D3("evd_destroy: entering, evd_rp 0x%p, rnum %d\n",
evd_rp, DAPLKA_RS_RNUM(evd_rp));
/*
* free CQ
*/
if (evd_rp->evd_cq_hdl) {
ibt_set_cq_handler(evd_rp->evd_cq_hdl, NULL, NULL);
mutex_enter(&daplka_dev->daplka_mutex);
ibt_set_cq_private(evd_rp->evd_cq_hdl, NULL);
mutex_exit(&daplka_dev->daplka_mutex);
status = daplka_ibt_free_cq(evd_rp, evd_rp->evd_cq_hdl);
if (status != IBT_SUCCESS) {
DERR("evd_destroy: ibt_free_cq returned %d\n", status);
}
evd_rp->evd_cq_hdl = NULL;
D2("evd_destroy: cq freed, rnum %d\n", DAPLKA_RS_RNUM(evd_rp));
}
/*
* release reference on CNO
*/
if (evd_rp->evd_cno_res != NULL) {
mutex_enter(&evd_rp->evd_cno_res->cno_lock);
if (evd_rp->evd_cno_res->cno_evd_cookie ==
evd_rp->evd_cookie) {
evd_rp->evd_cno_res->cno_evd_cookie = 0;
}
mutex_exit(&evd_rp->evd_cno_res->cno_lock);
DAPLKA_RS_UNREF(evd_rp->evd_cno_res);
evd_rp->evd_cno_res = NULL;
}
/*
* discard all remaining events
*/
mutex_enter(&evd_rp->evd_lock);
while ((evt = daplka_evd_event_dequeue(&evd_rp->evd_cr_events))) {
D2("evd_destroy: discarding CR event: %d\n",
evt->ee_cmev.ec_cm_ev_type);
len = evt->ee_cmev.ec_cm_ev_priv_data_len;
if (len > 0) {
kmem_free(evt->ee_cmev.ec_cm_ev_priv_data, len);
evt->ee_cmev.ec_cm_ev_priv_data = NULL;
evt->ee_cmev.ec_cm_ev_priv_data_len = 0;
}
kmem_free(evt, sizeof (*evt));
}
ASSERT(evd_rp->evd_cr_events.eel_num_elements == 0);
while ((evt = daplka_evd_event_dequeue(&evd_rp->evd_conn_events))) {
D2("evd_destroy: discarding CONN event: %d\n",
evt->ee_cmev.ec_cm_ev_type);
len = evt->ee_cmev.ec_cm_ev_priv_data_len;
if (len > 0) {
kmem_free(evt->ee_cmev.ec_cm_ev_priv_data, len);
evt->ee_cmev.ec_cm_ev_priv_data = NULL;
evt->ee_cmev.ec_cm_ev_priv_data_len = 0;
}
kmem_free(evt, sizeof (*evt));
}
ASSERT(evd_rp->evd_conn_events.eel_num_elements == 0);
while ((evt = daplka_evd_event_dequeue(&evd_rp->evd_async_events))) {
DERR("evd_destroy: discarding ASYNC event: %d\n",
evt->ee_aev.ibae_type);
kmem_free(evt, sizeof (*evt));
}
ASSERT(evd_rp->evd_async_events.eel_num_elements == 0);
mutex_exit(&evd_rp->evd_lock);
mutex_destroy(&evd_rp->evd_lock);
DAPLKA_RS_FINI(evd_rp);
kmem_free(evd_rp, sizeof (daplka_evd_resource_t));
D3("evd_destroy: exiting, evd_rp 0x%p\n", evd_rp);
return (0);
}
static void
daplka_hash_evd_free(void *obj)
{
daplka_evd_resource_t *evd_rp = (daplka_evd_resource_t *)obj;
ASSERT(DAPLKA_RS_TYPE(evd_rp) == DAPL_TYPE_EVD);
DAPLKA_RS_UNREF(evd_rp);
}
/*
* this handler fires when new completions arrive.
*/
/* ARGSUSED */
static void
daplka_cq_handler(ibt_cq_hdl_t ibt_cq, void *arg)
{
D3("cq_handler: fired setting evd_newevents\n");
daplka_evd_wakeup((daplka_evd_resource_t *)arg, NULL, NULL);
}
/*
* this routine wakes up a client from evd_wait. if evtq and evt
* are non-null, the event evt will be enqueued prior to waking
* up the client. if the evd is associated with a CNO and if there
* are no waiters on the evd, the CNO will be notified.
*/
static void
daplka_evd_wakeup(daplka_evd_resource_t *evd_rp, daplka_evd_event_list_t *evtq,
daplka_evd_event_t *evt)
{
uint32_t waiters = 0;
mutex_enter(&evd_rp->evd_lock);
if (evtq != NULL && evt != NULL) {
ASSERT(evtq == &evd_rp->evd_cr_events ||
evtq == &evd_rp->evd_conn_events ||
evtq == &evd_rp->evd_async_events);
daplka_evd_event_enqueue(evtq, evt);
ASSERT((evtq->eel_event_type == DAPLKA_EVD_CM_EVENTS) ||
(evtq->eel_event_type == DAPLKA_EVD_ASYNC_EVENTS));
evd_rp->evd_newevents |= evtq->eel_event_type;
} else {
evd_rp->evd_newevents |= DAPLKA_EVD_ULAND_EVENTS;
}
waiters = evd_rp->evd_waiters;
cv_broadcast(&evd_rp->evd_cv);
mutex_exit(&evd_rp->evd_lock);
/*
* only wakeup the CNO if there are no waiters on this evd.
*/
if (evd_rp->evd_cno_res != NULL && waiters == 0) {
mutex_enter(&evd_rp->evd_cno_res->cno_lock);
evd_rp->evd_cno_res->cno_evd_cookie = evd_rp->evd_cookie;
cv_broadcast(&evd_rp->evd_cno_res->cno_cv);
mutex_exit(&evd_rp->evd_cno_res->cno_lock);
}
}
/*
* daplka_evd_event_enqueue adds elem to the end of the event list
* The caller is expected to acquire appropriate locks before
* calling enqueue
*/
static void
daplka_evd_event_enqueue(daplka_evd_event_list_t *evlist,
daplka_evd_event_t *elem)
{
if (evlist->eel_tail) {
evlist->eel_tail->ee_next = elem;
evlist->eel_tail = elem;
} else {
/* list is empty */
ASSERT(evlist->eel_head == NULL);
evlist->eel_head = elem;
evlist->eel_tail = elem;
}
evlist->eel_num_elements++;
}
/*
* daplka_evd_event_dequeue removes and returns the first element of event
* list. NULL is returned if the list is empty. The caller is expected to
* acquire appropriate locks before calling enqueue.
*/
static daplka_evd_event_t *
daplka_evd_event_dequeue(daplka_evd_event_list_t *evlist)
{
daplka_evd_event_t *head;
head = evlist->eel_head;
if (head == NULL) {
return (NULL);
}
evlist->eel_head = head->ee_next;
evlist->eel_num_elements--;
/* if it was the last element update the tail pointer too */
if (evlist->eel_head == NULL) {
ASSERT(evlist->eel_num_elements == 0);
evlist->eel_tail = NULL;
}
return (head);
}
/*
* A CNO allows the client to wait for notifications from multiple EVDs.
* To use a CNO, the client needs to follow the procedure below:
* 1. allocate a CNO. this returns a cno_hkey that identifies the CNO.
* 2. create one or more EVDs using the returned cno_hkey.
* 3. call cno_wait. when one of the associated EVDs get notified, the
* CNO will also get notified. cno_wait will then return with a
* evd_cookie identifying the EVD that triggered the event.
*
* A note about cno_wait:
* -unlike a EVD, a CNO does not maintain a queue of notifications. For
* example, suppose multiple EVDs triggered a CNO before the client calls
* cno_wait; when the client calls cno_wait, it will return with the
* evd_cookie that identifies the *last* EVD that triggered the CNO. It
* is the responsibility of the client, upon returning from cno_wait, to
* check on all EVDs that can potentially trigger the CNO. the returned
* evd_cookie is only meant to be a hint. there is no guarantee that the
* EVD identified by the evd_cookie still contains an event or still
* exists by the time cno_wait returns.
*/
/*
* allocates a CNO.
* the returned cno_hkey may subsequently be used in evd_create.
*/
/* ARGSUSED */
static int
daplka_cno_alloc(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
dapl_cno_alloc_t args;
daplka_cno_resource_t *cno_rp = NULL;
uint64_t cno_hkey = 0;
boolean_t inserted = B_FALSE;
int retval = 0;
cno_rp = kmem_zalloc(sizeof (*cno_rp), daplka_km_flags);
if (cno_rp == NULL) {
DERR("cno_alloc: cannot allocate cno resource\n");
return (ENOMEM);
}
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*cno_rp))
DAPLKA_RS_INIT(cno_rp, DAPL_TYPE_CNO,
DAPLKA_RS_RNUM(ia_rp), daplka_cno_destroy);
mutex_init(&cno_rp->cno_lock, NULL, MUTEX_DRIVER, NULL);
cv_init(&cno_rp->cno_cv, NULL, CV_DRIVER, NULL);
cno_rp->cno_evd_cookie = 0;
/* insert into cno hash table */
retval = daplka_hash_insert(&ia_rp->ia_cno_htbl,
&cno_hkey, (void *)cno_rp);
if (retval != 0) {
DERR("cno_alloc: cannot insert cno resource\n");
goto cleanup;
}
inserted = B_TRUE;
_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*cno_rp))
/* return hkey to library */
args.cno_hkey = cno_hkey;
retval = ddi_copyout(&args, (void *)arg, sizeof (dapl_cno_alloc_t),
mode);
if (retval != 0) {
DERR("cno_alloc: copyout error %d\n", retval);
retval = EFAULT;
goto cleanup;
}
return (0);
cleanup:;
if (inserted) {
daplka_cno_resource_t *free_rp = NULL;
(void) daplka_hash_remove(&ia_rp->ia_cno_htbl, cno_hkey,
(void **)&free_rp);
if (free_rp != cno_rp) {
DERR("cno_alloc: cannot remove cno\n");
/*
* we can only get here if another thread
* has completed the cleanup in cno_free
*/
return (retval);
}
}
DAPLKA_RS_UNREF(cno_rp);
return (retval);
}
/*
* destroys a CNO.
* this gets called when a CNO resource's refcnt drops to zero.
*/
static int
daplka_cno_destroy(daplka_resource_t *gen_rp)
{
daplka_cno_resource_t *cno_rp = (daplka_cno_resource_t *)gen_rp;
ASSERT(DAPLKA_RS_REFCNT(cno_rp) == 0);
D2("cno_destroy: entering, cno_rp %p, rnum %d\n",
cno_rp, DAPLKA_RS_RNUM(cno_rp));
ASSERT(DAPLKA_RS_TYPE(cno_rp) == DAPL_TYPE_CNO);
cv_destroy(&cno_rp->cno_cv);
mutex_destroy(&cno_rp->cno_lock);
DAPLKA_RS_FINI(cno_rp);
kmem_free(cno_rp, sizeof (daplka_cno_resource_t));
D2("cno_destroy: exiting, cno_rp %p\n", cno_rp);
return (0);
}
static void
daplka_hash_cno_free(void *obj)
{
daplka_cno_resource_t *cno_rp = (daplka_cno_resource_t *)obj;
ASSERT(DAPLKA_RS_TYPE(cno_rp) == DAPL_TYPE_CNO);
DAPLKA_RS_UNREF(cno_rp);
}
/*
* removes the CNO from the cno hash table and frees the CNO
* if there are no references to it. if there are references to
* it, the CNO will be destroyed when the last of the references
* is released. once the CNO is removed from the cno hash table,
* the client will no longer be able to call cno_wait on the CNO.
*/
/* ARGSUSED */
static int
daplka_cno_free(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_cno_resource_t *cno_rp = NULL;
dapl_cno_free_t args;
int retval = 0;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_cno_free_t), mode);
if (retval != 0) {
DERR("cno_free: copyin error %d\n", retval);
return (EINVAL);
}
retval = daplka_hash_remove(&ia_rp->ia_cno_htbl,
args.cnf_hkey, (void **)&cno_rp);
if (retval != 0 || cno_rp == NULL) {
DERR("cno_free: cannot find cno resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(cno_rp) == DAPL_TYPE_CNO);
/* UNREF calls the actual free function when refcnt is zero */
DAPLKA_RS_UNREF(cno_rp);
return (0);
}
/*
* wait for a notification from one of the associated EVDs.
*/
/* ARGSUSED */
static int
daplka_cno_wait(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_cno_resource_t *cno_rp = NULL;
dapl_cno_wait_t args;
int retval = 0;
uint64_t evd_cookie = 0;
clock_t timeout, curr_time;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_cno_wait_t), mode);
if (retval != 0) {
DERR("cno_wait: copyin error %d\n", retval);
return (EINVAL);
}
/* get cno resource */
cno_rp = (daplka_cno_resource_t *)
daplka_hash_lookup(&ia_rp->ia_cno_htbl, args.cnw_hkey);
if (cno_rp == NULL) {
DERR("cno_wait: cannot find cno resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(cno_rp) == DAPL_TYPE_CNO);
curr_time = ddi_get_lbolt();
timeout = curr_time + drv_usectohz(args.cnw_timeout);
/*
* use the max value if we wrapped around
*/
if (args.cnw_timeout > 0 && timeout <= curr_time) {
/*
* clock_t (size long) changes between 32 and 64-bit kernels
*/
timeout = LONG_MAX >> 4;
}
mutex_enter(&cno_rp->cno_lock);
while (cno_rp->cno_evd_cookie == 0) {
int rval = 0;
rval = cv_timedwait_sig(&cno_rp->cno_cv,
&cno_rp->cno_lock, timeout);
if (rval == 0) {
DERR("cno_wait: interrupted\n");
mutex_exit(&cno_rp->cno_lock);
retval = EINTR;
goto cleanup;
} else if (rval == -1) {
DERR("cno_wait: timed out\n");
mutex_exit(&cno_rp->cno_lock);
retval = ETIME;
goto cleanup;
}
}
evd_cookie = cno_rp->cno_evd_cookie;
cno_rp->cno_evd_cookie = 0;
mutex_exit(&cno_rp->cno_lock);
ASSERT(evd_cookie != 0);
D2("cno_wait: returning evd_cookie 0x%p\n",
(void *)(uintptr_t)evd_cookie);
args.cnw_evd_cookie = evd_cookie;
retval = ddi_copyout((void *)&args, (void *)arg,
sizeof (dapl_cno_wait_t), mode);
if (retval != 0) {
DERR("cno_wait: copyout error %d\n", retval);
retval = EFAULT;
goto cleanup;
}
cleanup:;
if (cno_rp != NULL) {
DAPLKA_RS_UNREF(cno_rp);
}
return (retval);
}
/*
* this function is called by the client when it decides to
* accept a connection request. a connection request is generated
* when the active side generates REQ MAD to a service point on
* the destination node. this causes the CM service handler
* (daplka_cm_service_req) on the passive side to be callee. This
* handler will then enqueue this connection request to the backlog
* array of the service point. A connection event containing the
* backlog array index and connection request private data is passed
* to the client's service point EVD (sp_evd_res). once the event
* is passed up to the userland, the client may examine the request
* to decide whether to call daplka_cr_accept or dapka_cr_reject.
*/
/* ARGSUSED */
static int
daplka_cr_accept(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_ep_resource_t *ep_rp = NULL;
daplka_sp_resource_t *sp_rp = NULL;
dapl_cr_accept_t args;
daplka_sp_conn_pend_t *conn;
ibt_cm_proceed_reply_t proc_reply;
ibt_status_t status;
uint16_t bkl_index;
uint32_t old_state, new_state;
int retval = 0;
void *priv_data = NULL, *sid;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_cr_accept_t),
mode);
if (retval != 0) {
DERR("cr_accept: copyin error %d\n", retval);
return (EFAULT);
}
if (args.cra_priv_sz > DAPL_MAX_PRIVATE_DATA_SIZE) {
DERR("cr_accept: private data len (%d) exceeded "
"max size %d\n", args.cra_priv_sz,
DAPL_MAX_PRIVATE_DATA_SIZE);
return (EINVAL);
}
priv_data = (args.cra_priv_sz > 0) ? (void *)args.cra_priv : NULL;
D2("cr_accept: priv(0x%p) priv_len(%u) psep(0x%llx)\n", priv_data,
args.cra_priv_sz, (longlong_t)args.cra_bkl_cookie);
/* get sp resource */
sp_rp = (daplka_sp_resource_t *)daplka_hash_lookup(&ia_rp->ia_sp_htbl,
args.cra_sp_hkey);
if (sp_rp == NULL) {
DERR("cr_accept: cannot find sp resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(sp_rp) == DAPL_TYPE_SP);
/* get ep resource */
ep_rp = (daplka_ep_resource_t *)daplka_hash_lookup(&ia_rp->ia_ep_htbl,
args.cra_ep_hkey);
if (ep_rp == NULL) {
DERR("cr_accept: cannot find ep resource\n");
retval = EINVAL;
goto cleanup;
}
ASSERT(DAPLKA_RS_TYPE(ep_rp) == DAPL_TYPE_EP);
/*
* accept is only allowed if ep_state is CLOSED.
* note that after this point, the ep_state is frozen
* (i.e. TRANSITIONING) until we transition ep_state
* to ACCEPTING or back to CLOSED if we get an error.
*/
new_state = old_state = daplka_ep_get_state(ep_rp);
if (old_state != DAPLKA_EP_STATE_CLOSED) {
DERR("cr_accept: invalid ep state %d\n", old_state);
retval = EINVAL;
goto cleanup;
}
mutex_enter(&sp_rp->sp_lock);
bkl_index = DAPLKA_GET_PSEP_INDEX(args.cra_bkl_cookie);
/*
* make sure the backlog index is not bogus.
*/
if (bkl_index >= sp_rp->sp_backlog_size) {
DERR("cr_accept: invalid backlog index 0x%llx %d\n",
(longlong_t)args.cra_bkl_cookie, bkl_index);
mutex_exit(&sp_rp->sp_lock);
retval = EINVAL;
goto cleanup;
}
/*
* make sure the backlog index indeed refers
* to a pending connection.
*/
conn = &sp_rp->sp_backlog[bkl_index];
if (conn->spcp_state != DAPLKA_SPCP_PENDING) {
DERR("cr_accept: invalid conn state %d\n",
conn->spcp_state);
mutex_exit(&sp_rp->sp_lock);
retval = EINVAL;
goto cleanup;
}
if (conn->spcp_sid == NULL) {
DERR("cr_accept: sid == NULL\n");
mutex_exit(&sp_rp->sp_lock);
retval = EINVAL;
goto cleanup;
}
if (ep_rp->ep_chan_hdl == NULL) {
/*
* a ep_rp with a NULL chan_hdl is impossible.
*/
DERR("cr_accept: ep_chan_hdl == NULL\n");
mutex_exit(&sp_rp->sp_lock);
ASSERT(B_FALSE);
retval = EINVAL;
goto cleanup;
}
proc_reply.rep.cm_channel = ep_rp->ep_chan_hdl;
proc_reply.rep.cm_rdma_ra_out = conn->spcp_rdma_ra_out;
proc_reply.rep.cm_rdma_ra_in = conn->spcp_rdma_ra_in;
proc_reply.rep.cm_rnr_retry_cnt = IBT_RNR_INFINITE_RETRY;
sid = conn->spcp_sid;
/*
* this clears our slot in the backlog array.
* this slot may now be used by other pending connections.
*/
conn->spcp_sid = NULL;
conn->spcp_state = DAPLKA_SPCP_INIT;
conn->spcp_req_len = 0;
mutex_exit(&sp_rp->sp_lock);
/*
* Set the unique cookie corresponding to the CR to this EP
* so that is can be used in passive side CM callbacks
*/
ep_rp->ep_psep_cookie = args.cra_bkl_cookie;
status = ibt_cm_proceed(IBT_CM_EVENT_REQ_RCV, sid, IBT_CM_ACCEPT,
&proc_reply, priv_data, (ibt_priv_data_len_t)args.cra_priv_sz);
if (status != IBT_SUCCESS) {
DERR("cr_accept: ibt_cm_proceed returned %d\n", status);
*rvalp = (int)status;
retval = 0;
}
/*
* note that the CM handler may actually be called at this
* point. but since ep_state is still in TRANSITIONING, the
* handler will wait until we transition to ACCEPTING. this
* prevents the case where we set ep_state to ACCEPTING after
* daplka_service_conn_est sets ep_state to CONNECTED.
*/
new_state = DAPLKA_EP_STATE_ACCEPTING;
cleanup:;
if (sp_rp != NULL) {
DAPLKA_RS_UNREF(sp_rp);
}
if (ep_rp != NULL) {
daplka_ep_set_state(ep_rp, old_state, new_state);
DAPLKA_RS_UNREF(ep_rp);
}
return (retval);
}
/*
* this function is called by the client to reject a
* connection request.
*/
/* ARGSUSED */
static int
daplka_cr_reject(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
dapl_cr_reject_t args;
daplka_sp_resource_t *sp_rp = NULL;
daplka_sp_conn_pend_t *conn;
ibt_cm_proceed_reply_t proc_reply;
ibt_cm_status_t proc_status;
ibt_status_t status;
uint16_t bkl_index;
int retval = 0;
void *sid;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_cr_reject_t),
mode);
if (retval != 0) {
DERR("cr_reject: copyin error %d\n", retval);
return (EFAULT);
}
/* get sp resource */
sp_rp = (daplka_sp_resource_t *)daplka_hash_lookup(&ia_rp->ia_sp_htbl,
args.crr_sp_hkey);
if (sp_rp == NULL) {
DERR("cr_reject: cannot find sp resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(sp_rp) == DAPL_TYPE_SP);
D2("cr_reject: psep(0x%llx)\n", (longlong_t)args.crr_bkl_cookie);
mutex_enter(&sp_rp->sp_lock);
bkl_index = DAPLKA_GET_PSEP_INDEX(args.crr_bkl_cookie);
/*
* make sure the backlog index is not bogus.
*/
if (bkl_index >= sp_rp->sp_backlog_size) {
DERR("cr_reject: invalid backlog index 0x%llx %d\n",
(longlong_t)args.crr_bkl_cookie, bkl_index);
mutex_exit(&sp_rp->sp_lock);
retval = EINVAL;
goto cleanup;
}
/*
* make sure the backlog index indeed refers
* to a pending connection.
*/
conn = &sp_rp->sp_backlog[bkl_index];
if (conn->spcp_state != DAPLKA_SPCP_PENDING) {
DERR("cr_reject: invalid conn state %d\n",
conn->spcp_state);
mutex_exit(&sp_rp->sp_lock);
retval = EINVAL;
goto cleanup;
}
if (conn->spcp_sid == NULL) {
DERR("cr_reject: sid == NULL\n");
mutex_exit(&sp_rp->sp_lock);
retval = EINVAL;
goto cleanup;
}
bzero(&proc_reply, sizeof (proc_reply));
sid = conn->spcp_sid;
/*
* this clears our slot in the backlog array.
* this slot may now be used by other pending connections.
*/
conn->spcp_sid = NULL;
conn->spcp_state = DAPLKA_SPCP_INIT;
conn->spcp_req_len = 0;
switch (args.crr_reason) {
case DAPL_IB_CM_REJ_REASON_CONSUMER_REJ:
/* results in IBT_CM_CONSUMER as the reason for reject */
proc_status = IBT_CM_REJECT;
break;
case DAPL_IB_CME_LOCAL_FAILURE:
/*FALLTHRU*/
case DAPL_IB_CME_DESTINATION_UNREACHABLE:
/* results in IBT_CM_NO_RESC as the reason for reject */
proc_status = IBT_CM_NO_RESOURCE;
break;
default:
/* unexpect reason code */
ASSERT(!"unexpected reject reason code");
proc_status = IBT_CM_NO_RESOURCE;
break;
}
mutex_exit(&sp_rp->sp_lock);
status = ibt_cm_proceed(IBT_CM_EVENT_REQ_RCV, sid, proc_status,
&proc_reply, NULL, 0);
if (status != IBT_SUCCESS) {
DERR("cr_reject: ibt_cm_proceed returned %d\n", status);
*rvalp = (int)status;
retval = 0;
}
cleanup:;
if (sp_rp != NULL) {
DAPLKA_RS_UNREF(sp_rp);
}
return (retval);
}
/*
* daplka_sp_match is used by daplka_hash_walk for finding SPs
*/
typedef struct daplka_sp_match_s {
uint64_t spm_conn_qual;
daplka_sp_resource_t *spm_sp_rp;
} daplka_sp_match_t;
_NOTE(SCHEME_PROTECTS_DATA("daplka", daplka_sp_match_s::spm_sp_rp))
static int
daplka_sp_match(void *objp, void *arg)
{
daplka_sp_resource_t *sp_rp = (daplka_sp_resource_t *)objp;
ASSERT(DAPLKA_RS_TYPE(sp_rp) == DAPL_TYPE_SP);
if (sp_rp->sp_conn_qual ==
((daplka_sp_match_t *)arg)->spm_conn_qual) {
((daplka_sp_match_t *)arg)->spm_sp_rp = sp_rp;
D2("daplka_sp_match: found sp, conn_qual %016llu\n",
(longlong_t)((daplka_sp_match_t *)arg)->spm_conn_qual);
DAPLKA_RS_REF(sp_rp);
return (1);
}
return (0);
}
/*
* cr_handoff allows the client to handoff a connection request from
* one service point to another.
*/
/* ARGSUSED */
static int
daplka_cr_handoff(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
dapl_cr_handoff_t args;
daplka_sp_resource_t *sp_rp = NULL, *new_sp_rp = NULL;
daplka_sp_conn_pend_t *conn;
daplka_sp_match_t sp_match;
ibt_cm_event_t fake_event;
ibt_cm_status_t cm_status;
ibt_status_t status;
uint16_t bkl_index;
void *sid, *priv = NULL;
int retval = 0, priv_len = 0;
D3("cr_handoff: entering\n");
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_cr_handoff_t),
mode);
if (retval != 0) {
DERR("cr_handoff: copyin error %d\n", retval);
return (EFAULT);
}
/* get sp resource */
sp_rp = (daplka_sp_resource_t *)daplka_hash_lookup(&ia_rp->ia_sp_htbl,
args.crh_sp_hkey);
if (sp_rp == NULL) {
DERR("cr_handoff: cannot find sp resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(sp_rp) == DAPL_TYPE_SP);
/*
* find the destination service point.
*/
sp_match.spm_conn_qual = args.crh_conn_qual;
sp_match.spm_sp_rp = NULL;
daplka_hash_walk(&daplka_global_sp_htbl, daplka_sp_match,
(void *)&sp_match, RW_READER);
/*
* return if we cannot find the service point
*/
if (sp_match.spm_sp_rp == NULL) {
DERR("cr_handoff: new sp not found, conn qual = %llu\n",
(longlong_t)args.crh_conn_qual);
retval = EINVAL;
goto cleanup;
}
new_sp_rp = sp_match.spm_sp_rp;
/*
* the spec does not discuss the security implications of this
* function. to be safe, we currently only allow processes
* owned by the same user to handoff connection requests
* to each other.
*/
if (crgetruid(cred) != new_sp_rp->sp_ruid) {
DERR("cr_handoff: permission denied\n");
retval = EPERM;
goto cleanup;
}
D2("cr_handoff: psep(0x%llx)\n", (longlong_t)args.crh_bkl_cookie);
mutex_enter(&sp_rp->sp_lock);
bkl_index = DAPLKA_GET_PSEP_INDEX(args.crh_bkl_cookie);
/*
* make sure the backlog index is not bogus.
*/
if (bkl_index >= sp_rp->sp_backlog_size) {
DERR("cr_handoff: invalid backlog index 0x%llx %d\n",
(longlong_t)args.crh_bkl_cookie, bkl_index);
mutex_exit(&sp_rp->sp_lock);
retval = EINVAL;
goto cleanup;
}
/*
* make sure the backlog index indeed refers
* to a pending connection.
*/
conn = &sp_rp->sp_backlog[bkl_index];
if (conn->spcp_state != DAPLKA_SPCP_PENDING) {
DERR("cr_handoff: invalid conn state %d\n",
conn->spcp_state);
mutex_exit(&sp_rp->sp_lock);
retval = EINVAL;
goto cleanup;
}
if (conn->spcp_sid == NULL) {
DERR("cr_handoff: sid == NULL\n");
mutex_exit(&sp_rp->sp_lock);
retval = EINVAL;
goto cleanup;
}
sid = conn->spcp_sid;
priv = NULL;
priv_len = conn->spcp_req_len;
if (priv_len > 0) {
priv = kmem_zalloc(priv_len, daplka_km_flags);
if (priv == NULL) {
mutex_exit(&sp_rp->sp_lock);
retval = ENOMEM;
goto cleanup;
}
bcopy(conn->spcp_req_data, priv, priv_len);
}
/*
* this clears our slot in the backlog array.
* this slot may now be used by other pending connections.
*/
conn->spcp_sid = NULL;
conn->spcp_state = DAPLKA_SPCP_INIT;
conn->spcp_req_len = 0;
mutex_exit(&sp_rp->sp_lock);
/* fill fake_event and call service_req handler */
bzero(&fake_event, sizeof (fake_event));
fake_event.cm_type = IBT_CM_EVENT_REQ_RCV;
fake_event.cm_session_id = sid;
fake_event.cm_priv_data_len = priv_len;
fake_event.cm_priv_data = priv;
cm_status = daplka_cm_service_req(new_sp_rp,
&fake_event, NULL, priv, (ibt_priv_data_len_t)priv_len);
if (cm_status != IBT_CM_DEFER) {
ibt_cm_proceed_reply_t proc_reply;
DERR("cr_handoff: service_req returned %d\n", cm_status);
/*
* if for some reason cm_service_req failed, we
* reject the connection.
*/
bzero(&proc_reply, sizeof (proc_reply));
status = ibt_cm_proceed(IBT_CM_EVENT_REQ_RCV, sid,
IBT_CM_NO_RESOURCE, &proc_reply, NULL, 0);
if (status != IBT_SUCCESS) {
DERR("cr_handoff: ibt_cm_proceed returned %d\n",
status);
}
*rvalp = (int)status;
retval = 0;
}
cleanup:;
if (priv_len > 0 && priv != NULL) {
kmem_free(priv, priv_len);
}
if (new_sp_rp != NULL) {
DAPLKA_RS_UNREF(new_sp_rp);
}
if (sp_rp != NULL) {
DAPLKA_RS_UNREF(sp_rp);
}
D3("cr_handoff: exiting\n");
return (retval);
}
/*
* returns a list of hca attributes
*/
/* ARGSUSED */
static int
daplka_ia_query(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
dapl_ia_query_t args;
int retval;
ibt_hca_attr_t *hcap;
hcap = &ia_rp->ia_hca->hca_attr;
/*
* Take the ibt_hca_attr_t and stuff them into dapl_hca_attr_t
*/
args.hca_attr.dhca_vendor_id = hcap->hca_vendor_id;
args.hca_attr.dhca_device_id = hcap->hca_device_id;
args.hca_attr.dhca_version_id = hcap->hca_version_id;
args.hca_attr.dhca_max_chans = hcap->hca_max_chans;
args.hca_attr.dhca_max_chan_sz = hcap->hca_max_chan_sz;
args.hca_attr.dhca_max_sgl = hcap->hca_max_sgl;
args.hca_attr.dhca_max_cq = hcap->hca_max_cq;
args.hca_attr.dhca_max_cq_sz = hcap->hca_max_cq_sz;
args.hca_attr.dhca_max_memr = hcap->hca_max_memr;
args.hca_attr.dhca_max_memr_len = hcap->hca_max_memr_len;
args.hca_attr.dhca_max_mem_win = hcap->hca_max_mem_win;
args.hca_attr.dhca_max_rdma_in_chan = hcap->hca_max_rdma_in_chan;
args.hca_attr.dhca_max_rdma_out_chan = hcap->hca_max_rdma_out_chan;
args.hca_attr.dhca_max_partitions = hcap->hca_max_partitions;
args.hca_attr.dhca_nports = hcap->hca_nports;
args.hca_attr.dhca_node_guid = hcap->hca_node_guid;
args.hca_attr.dhca_max_pd = hcap->hca_max_pd;
args.hca_attr.dhca_max_srqs = hcap->hca_max_srqs;
args.hca_attr.dhca_max_srqs_sz = hcap->hca_max_srqs_sz;
args.hca_attr.dhca_max_srq_sgl = hcap->hca_max_srq_sgl;
retval = ddi_copyout(&args, (void *)arg, sizeof (dapl_ia_query_t),
mode);
if (retval != 0) {
DERR("ia_query: copyout error %d\n", retval);
return (EFAULT);
}
return (0);
}
/*
* This routine is passed to hash walk in the daplka_pre_mr_cleanup_callback,
* it frees the mw embedded in the mw resource object.
*/
/* ARGSUSED */
static int
daplka_mr_cb_freemw(void *objp, void *arg)
{
daplka_mw_resource_t *mw_rp = (daplka_mw_resource_t *)objp;
ibt_mw_hdl_t mw_hdl;
ibt_status_t status;
D3("mr_cb_freemw: entering, mw_rp 0x%p\n", mw_rp);
DAPLKA_RS_REF(mw_rp);
mutex_enter(&mw_rp->mw_lock);
mw_hdl = mw_rp->mw_hdl;
/*
* we set mw_hdl to NULL so it won't get freed again
*/
mw_rp->mw_hdl = NULL;
mutex_exit(&mw_rp->mw_lock);
if (mw_hdl != NULL) {
status = daplka_ibt_free_mw(mw_rp, mw_rp->mw_hca_hdl, mw_hdl);
if (status != IBT_SUCCESS) {
DERR("mr_cb_freemw: ibt_free_mw returned %d\n", status);
}
D3("mr_cb_freemw: mw freed\n");
}
DAPLKA_RS_UNREF(mw_rp);
return (0);
}
/*
* This routine is called from HCA driver's umem lock undo callback
* when the memory associated with an MR is being unmapped. In this callback
* we free all the MW associated with the IA and post an unaffiliated
* async event to tell the app that there was a catastrophic event.
* This allows the HCA to deregister the MR in its callback processing.
*/
static void
daplka_pre_mr_cleanup_callback(void *arg1, void *arg2 /*ARGSUSED*/)
{
daplka_mr_resource_t *mr_rp;
daplka_ia_resource_t *ia_rp;
#ifdef _THROW_ASYNC_EVENT_FROM_MRUNLOCKCB
ibt_async_event_t event;
ibt_hca_attr_t *hca_attrp;
#endif
minor_t rnum;
mr_rp = (daplka_mr_resource_t *)arg1;
rnum = DAPLKA_RS_RNUM(mr_rp);
daplka_shared_mr_free(mr_rp);
ia_rp = (daplka_ia_resource_t *)daplka_resource_lookup(rnum);
if (ia_rp == NULL) {
DERR("daplka_mr_unlock_callback: resource not found, rnum %d\n",
rnum);
return;
}
DERR("daplka_mr_unlock_callback: resource(%p) rnum(%d)\n", ia_rp, rnum);
mutex_enter(&ia_rp->ia_lock);
/*
* MW is being alloced OR MW freeze has already begun. In
* both these cases we wait for that to complete before
* continuing.
*/
while ((ia_rp->ia_state == DAPLKA_IA_MW_ALLOC_IN_PROGRESS) ||
(ia_rp->ia_state == DAPLKA_IA_MW_FREEZE_IN_PROGRESS)) {
cv_wait(&ia_rp->ia_cv, &ia_rp->ia_lock);
}
switch (ia_rp->ia_state) {
case DAPLKA_IA_INIT:
ia_rp->ia_state = DAPLKA_IA_MW_FREEZE_IN_PROGRESS;
mutex_exit(&ia_rp->ia_lock);
break;
case DAPLKA_IA_MW_FROZEN:
/* the mw on this ia have been freed */
D2("daplka_mr_unlock_callback: ia_state %d nothing to do\n",
ia_rp->ia_state);
mutex_exit(&ia_rp->ia_lock);
goto cleanup;
default:
ASSERT(!"daplka_mr_unlock_callback: IA state invalid");
DERR("daplka_mr_unlock_callback: invalid ia_state %d\n",
ia_rp->ia_state);
mutex_exit(&ia_rp->ia_lock);
goto cleanup;
}
/*
* Walk the mw hash table and free the mws. Acquire a writer
* lock since we don't want anyone else traversing this tree
* while we are freeing the MW.
*/
daplka_hash_walk(&ia_rp->ia_mw_htbl, daplka_mr_cb_freemw, NULL,
RW_WRITER);
mutex_enter(&ia_rp->ia_lock);
ASSERT(ia_rp->ia_state == DAPLKA_IA_MW_FREEZE_IN_PROGRESS);
ia_rp->ia_state = DAPLKA_IA_MW_FROZEN;
cv_broadcast(&ia_rp->ia_cv);
mutex_exit(&ia_rp->ia_lock);
/*
* Currently commented out because Oracle skgxp is incapable
* of handling async events correctly.
*/
#ifdef _THROW_ASYNC_EVENT_FROM_MRUNLOCKCB
/*
* Enqueue an unaffiliated async error event to indicate this
* IA has encountered a problem that caused the MW to freed up
*/
/* Create a fake event, only relevant field is the hca_guid */
bzero(&event, sizeof (ibt_async_event_t));
hca_attrp = &ia_rp->ia_hca->hca_attr;
event.ev_hca_guid = hca_attrp->hca_node_guid;
daplka_async_event_create(IBT_ERROR_LOCAL_CATASTROPHIC, &event, 0,
ia_rp);
#endif /* _THROW_ASYNC_EVENT_FROM_MRUNLOCKCB */
cleanup:;
D2("daplka_mr_unlock_callback: resource(%p) done\n", ia_rp);
DAPLKA_RS_UNREF(ia_rp);
}
/*
* registers a memory region.
* memory locking will be done by the HCA driver.
*/
/* ARGSUSED */
static int
daplka_mr_register(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
boolean_t inserted = B_FALSE;
daplka_mr_resource_t *mr_rp;
daplka_pd_resource_t *pd_rp;
dapl_mr_register_t args;
ibt_mr_data_in_t mr_cb_data_in;
uint64_t mr_hkey = 0;
ibt_status_t status;
int retval;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_mr_register_t),
mode);
if (retval != 0) {
DERR("mr_register: copyin error %d\n", retval);
return (EINVAL);
}
mr_rp = kmem_zalloc(sizeof (daplka_mr_resource_t), daplka_km_flags);
if (mr_rp == NULL) {
DERR("mr_register: cannot allocate mr resource\n");
return (ENOMEM);
}
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*mr_rp))
DAPLKA_RS_INIT(mr_rp, DAPL_TYPE_MR,
DAPLKA_RS_RNUM(ia_rp), daplka_mr_destroy);
mutex_init(&mr_rp->mr_lock, NULL, MUTEX_DRIVER, NULL);
mr_rp->mr_hca = ia_rp->ia_hca;
mr_rp->mr_hca_hdl = ia_rp->ia_hca_hdl;
mr_rp->mr_next = NULL;
mr_rp->mr_shared_mr = NULL;
/* get pd handle */
pd_rp = (daplka_pd_resource_t *)
daplka_hash_lookup(&ia_rp->ia_pd_htbl, args.mr_pd_hkey);
if (pd_rp == NULL) {
DERR("mr_register: cannot find pd resource\n");
retval = EINVAL;
goto cleanup;
}
ASSERT(DAPLKA_RS_TYPE(pd_rp) == DAPL_TYPE_PD);
mr_rp->mr_pd_res = pd_rp;
mr_rp->mr_attr.mr_vaddr = args.mr_vaddr;
mr_rp->mr_attr.mr_len = args.mr_len;
mr_rp->mr_attr.mr_as = curproc->p_as;
mr_rp->mr_attr.mr_flags = args.mr_flags | IBT_MR_NOSLEEP;
D3("mr_register: mr_vaddr %p, mr_len %llu, mr_flags 0x%x\n",
(void *)(uintptr_t)mr_rp->mr_attr.mr_vaddr,
(longlong_t)mr_rp->mr_attr.mr_len,
mr_rp->mr_attr.mr_flags);
status = daplka_ibt_register_mr(mr_rp, ia_rp->ia_hca_hdl,
mr_rp->mr_pd_res->pd_hdl, &mr_rp->mr_attr, &mr_rp->mr_hdl,
&mr_rp->mr_desc);
if (status != IBT_SUCCESS) {
DERR("mr_register: ibt_register_mr error %d\n", status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
mr_cb_data_in.mr_rev = IBT_MR_DATA_IN_IF_VERSION;
mr_cb_data_in.mr_func = daplka_pre_mr_cleanup_callback;
mr_cb_data_in.mr_arg1 = (void *)mr_rp;
mr_cb_data_in.mr_arg2 = NULL;
/* Pass the service driver mr cleanup handler to the hca driver */
status = ibt_ci_data_in(ia_rp->ia_hca_hdl,
IBT_CI_NO_FLAGS, IBT_HDL_MR, (void *)mr_rp->mr_hdl,
&mr_cb_data_in, sizeof (mr_cb_data_in));
if (status != IBT_SUCCESS) {
DERR("mr_register: ibt_ci_data_in error(%d) ver(%d)",
status, mr_cb_data_in.mr_rev);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
/* insert into mr hash table */
retval = daplka_hash_insert(&ia_rp->ia_mr_htbl,
&mr_hkey, (void *)mr_rp);
if (retval != 0) {
DERR("mr_register: cannot insert mr resource into mr_htbl\n");
goto cleanup;
}
inserted = B_TRUE;
_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*mr_rp))
args.mr_lkey = mr_rp->mr_desc.md_lkey;
args.mr_rkey = mr_rp->mr_desc.md_rkey;
args.mr_hkey = mr_hkey;
retval = ddi_copyout((void *)&args, (void *)arg,
sizeof (dapl_mr_register_t), mode);
if (retval != 0) {
DERR("mr_register: copyout error %d\n", retval);
retval = EFAULT;
goto cleanup;
}
return (0);
cleanup:;
if (inserted) {
daplka_mr_resource_t *free_rp = NULL;
(void) daplka_hash_remove(&ia_rp->ia_mr_htbl, mr_hkey,
(void **)&free_rp);
if (free_rp != mr_rp) {
DERR("mr_register: cannot remove mr from hash table\n");
/*
* we can only get here if another thread
* has completed the cleanup in mr_deregister
*/
return (retval);
}
}
DAPLKA_RS_UNREF(mr_rp);
return (retval);
}
/*
* registers a shared memory region.
* the client calls this function with the intention to share the memory
* region with other clients. it is assumed that, prior to calling this
* function, the client(s) are already sharing parts of their address
* space using a mechanism such as SYSV shared memory. the first client
* that calls this function will create and insert a daplka_shared_mr_t
* object into the global daplka_shared_mr_tree. this shared mr object
* will be identified by a unique 40-byte key and will maintain a list
* of mr resources. every time this function gets called with the same
* 40-byte key, a new mr resource (containing a new mr handle generated
* by ibt_register_mr or ibt_register_shared_mr) is created and inserted
* into this list. similarly, every time a shared mr gets deregistered
* or invalidated by a callback, the mr resource gets removed from this
* list. the shared mr object has a reference count. when it drops to
* zero, the shared mr object will be removed from the global avl tree
* and be freed.
*/
/* ARGSUSED */
static int
daplka_mr_register_shared(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
dapl_mr_register_shared_t args;
daplka_shared_mr_t *smrp = NULL;
daplka_shared_mr_t tmp_smr;
ibt_mr_data_in_t mr_cb_data_in;
avl_index_t where;
boolean_t inserted = B_FALSE;
daplka_mr_resource_t *mr_rp = NULL;
daplka_pd_resource_t *pd_rp;
uint64_t mr_hkey = 0;
ibt_status_t status;
int retval;
retval = ddi_copyin((void *)arg, &args,
sizeof (dapl_mr_register_shared_t), mode);
if (retval != 0) {
DERR("mr_register_shared: copyin error %d\n", retval);
return (EINVAL);
}
mutex_enter(&daplka_shared_mr_lock);
/*
* find smrp from the global avl tree.
* the 40-byte key is used as the lookup key.
*/
tmp_smr.smr_cookie = args.mrs_shm_cookie;
smrp = (daplka_shared_mr_t *)
avl_find(&daplka_shared_mr_tree, &tmp_smr, &where);
if (smrp != NULL) {
D2("mr_register_shared: smrp 0x%p, found cookie:\n"
"0x%016llx%016llx%016llx%016llx%016llx\n", smrp,
(longlong_t)tmp_smr.smr_cookie.mc_uint_arr[4],
(longlong_t)tmp_smr.smr_cookie.mc_uint_arr[3],
(longlong_t)tmp_smr.smr_cookie.mc_uint_arr[2],
(longlong_t)tmp_smr.smr_cookie.mc_uint_arr[1],
(longlong_t)tmp_smr.smr_cookie.mc_uint_arr[0]);
/*
* if the smrp exists, other threads could still be
* accessing it. we wait until they are done before
* we continue.
*/
smrp->smr_refcnt++;
while (smrp->smr_state == DAPLKA_SMR_TRANSITIONING) {
D2("mr_register_shared: smrp 0x%p, "
"waiting in transitioning state, refcnt %d\n",
smrp, smrp->smr_refcnt);
cv_wait(&smrp->smr_cv, &daplka_shared_mr_lock);
}
ASSERT(smrp->smr_state == DAPLKA_SMR_READY);
D2("mr_register_shared: smrp 0x%p, refcnt %d, ready\n",
smrp, smrp->smr_refcnt);
/*
* we set smr_state to TRANSITIONING to temporarily
* prevent other threads from trying to access smrp.
*/
smrp->smr_state = DAPLKA_SMR_TRANSITIONING;
} else {
D2("mr_register_shared: cannot find cookie:\n"
"0x%016llx%016llx%016llx%016llx%016llx\n",
(longlong_t)tmp_smr.smr_cookie.mc_uint_arr[4],
(longlong_t)tmp_smr.smr_cookie.mc_uint_arr[3],
(longlong_t)tmp_smr.smr_cookie.mc_uint_arr[2],
(longlong_t)tmp_smr.smr_cookie.mc_uint_arr[1],
(longlong_t)tmp_smr.smr_cookie.mc_uint_arr[0]);
/*
* if we cannot find smrp, we need to create and
* insert one into daplka_shared_mr_tree
*/
smrp = kmem_zalloc(sizeof (daplka_shared_mr_t),
daplka_km_flags);
if (smrp == NULL) {
retval = ENOMEM;
mutex_exit(&daplka_shared_mr_lock);
goto cleanup;
}
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*smrp))
smrp->smr_refcnt = 1;
smrp->smr_cookie = args.mrs_shm_cookie;
smrp->smr_state = DAPLKA_SMR_TRANSITIONING;
smrp->smr_mr_list = NULL;
cv_init(&smrp->smr_cv, NULL, CV_DRIVER, NULL);
avl_insert(&daplka_shared_mr_tree, smrp, where);
_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*smrp))
}
mutex_exit(&daplka_shared_mr_lock);
mr_rp = kmem_zalloc(sizeof (daplka_mr_resource_t), daplka_km_flags);
if (mr_rp == NULL) {
DERR("mr_register_shared: cannot allocate mr resource\n");
goto cleanup;
}
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*mr_rp))
DAPLKA_RS_INIT(mr_rp, DAPL_TYPE_MR,
DAPLKA_RS_RNUM(ia_rp), daplka_mr_destroy);
mutex_init(&mr_rp->mr_lock, NULL, MUTEX_DRIVER, NULL);
mr_rp->mr_hca = ia_rp->ia_hca;
mr_rp->mr_hca_hdl = ia_rp->ia_hca_hdl;
mr_rp->mr_next = NULL;
mr_rp->mr_shared_mr = NULL;
/* get pd handle */
pd_rp = (daplka_pd_resource_t *)
daplka_hash_lookup(&ia_rp->ia_pd_htbl, args.mrs_pd_hkey);
if (pd_rp == NULL) {
DERR("mr_register_shared: cannot find pd resource\n");
retval = EINVAL;
goto cleanup;
}
ASSERT(DAPLKA_RS_TYPE(pd_rp) == DAPL_TYPE_PD);
mr_rp->mr_pd_res = pd_rp;
mr_rp->mr_attr.mr_vaddr = args.mrs_vaddr;
mr_rp->mr_attr.mr_len = args.mrs_len;
mr_rp->mr_attr.mr_flags = args.mrs_flags | IBT_MR_NOSLEEP;
mr_rp->mr_attr.mr_as = curproc->p_as;
D2("mr_register_shared: mr_vaddr 0x%p, mr_len %llu, "
"mr_flags 0x%x, mr_as 0x%p, mr_exists %d, smrp 0x%p\n",
(void *)(uintptr_t)mr_rp->mr_attr.mr_vaddr,
(longlong_t)mr_rp->mr_attr.mr_len,
mr_rp->mr_attr.mr_flags, mr_rp->mr_attr.mr_as,
(int)(smrp->smr_mr_list != NULL), smrp);
/*
* since we are in TRANSITIONING state, we are guaranteed
* that we have exclusive access to smr_mr_list.
*/
if (smrp->smr_mr_list != NULL) {
ibt_smr_attr_t mem_sattr;
/*
* a non-null smr_mr_list indicates that someone
* else has already inserted an mr_resource into
* smr_mr_list. we use the mr_handle from the first
* element as an arg to ibt_register_shared_mr.
*/
mem_sattr.mr_vaddr = smrp->smr_mr_list->mr_desc.md_vaddr;
mem_sattr.mr_flags = mr_rp->mr_attr.mr_flags;
D2("mr_register_shared: mem_sattr vaddr 0x%p flags 0x%x\n",
(void *)(uintptr_t)mem_sattr.mr_vaddr, mem_sattr.mr_flags);
status = daplka_ibt_register_shared_mr(mr_rp, ia_rp->ia_hca_hdl,
smrp->smr_mr_list->mr_hdl, mr_rp->mr_pd_res->pd_hdl,
&mem_sattr, &mr_rp->mr_hdl, &mr_rp->mr_desc);
if (status != IBT_SUCCESS) {
DERR("mr_register_shared: "
"ibt_register_shared_mr error %d\n", status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
} else {
/*
* an mr does not exist yet. we need to create one
* using ibt_register_mr.
*/
status = daplka_ibt_register_mr(mr_rp, ia_rp->ia_hca_hdl,
mr_rp->mr_pd_res->pd_hdl, &mr_rp->mr_attr,
&mr_rp->mr_hdl, &mr_rp->mr_desc);
if (status != IBT_SUCCESS) {
DERR("mr_register_shared: "
"ibt_register_mr error %d\n", status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
}
mr_cb_data_in.mr_rev = IBT_MR_DATA_IN_IF_VERSION;
mr_cb_data_in.mr_func = daplka_pre_mr_cleanup_callback;
mr_cb_data_in.mr_arg1 = (void *)mr_rp;
mr_cb_data_in.mr_arg2 = NULL;
/* Pass the service driver mr cleanup handler to the hca driver */
status = ibt_ci_data_in(ia_rp->ia_hca_hdl,
IBT_CI_NO_FLAGS, IBT_HDL_MR, (void *)mr_rp->mr_hdl,
&mr_cb_data_in, sizeof (mr_cb_data_in));
if (status != IBT_SUCCESS) {
DERR("mr_register_shared: ibt_ci_data_in error(%d) ver(%d)",
status, mr_cb_data_in.mr_rev);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
/*
* we bump reference of mr_rp and enqueue it onto smrp.
*/
DAPLKA_RS_REF(mr_rp);
mr_rp->mr_next = smrp->smr_mr_list;
smrp->smr_mr_list = mr_rp;
mr_rp->mr_shared_mr = smrp;
/* insert into mr hash table */
retval = daplka_hash_insert(&ia_rp->ia_mr_htbl,
&mr_hkey, (void *)mr_rp);
if (retval != 0) {
DERR("mr_register_shared: cannot insert mr resource\n");
goto cleanup;
}
inserted = B_TRUE;
_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*mr_rp))
/*
* at this point, there are two references to our mr resource.
* one is kept in ia_mr_htbl. the other is kept in the list
* within this shared mr object (smrp). when we deregister this
* mr or when a callback invalidates this mr, the reference kept
* by this shared mr object will be removed.
*/
args.mrs_lkey = mr_rp->mr_desc.md_lkey;
args.mrs_rkey = mr_rp->mr_desc.md_rkey;
args.mrs_hkey = mr_hkey;
retval = ddi_copyout((void *)&args, (void *)arg,
sizeof (dapl_mr_register_shared_t), mode);
if (retval != 0) {
DERR("mr_register_shared: copyout error %d\n", retval);
retval = EFAULT;
goto cleanup;
}
/*
* set the state to READY to allow others to continue
*/
mutex_enter(&daplka_shared_mr_lock);
smrp->smr_state = DAPLKA_SMR_READY;
cv_broadcast(&smrp->smr_cv);
mutex_exit(&daplka_shared_mr_lock);
return (0);
cleanup:;
if (inserted) {
daplka_mr_resource_t *free_rp = NULL;
(void) daplka_hash_remove(&ia_rp->ia_mr_htbl, mr_hkey,
(void **)&free_rp);
if (free_rp != mr_rp) {
DERR("mr_register_shared: "
"cannot remove mr from hash table\n");
/*
* we can only get here if another thread
* has completed the cleanup in mr_deregister
*/
return (retval);
}
}
if (smrp != NULL) {
mutex_enter(&daplka_shared_mr_lock);
ASSERT(smrp->smr_refcnt > 0);
smrp->smr_refcnt--;
if (smrp->smr_refcnt == 0) {
DERR("mr_register_shared: freeing smrp 0x%p\n", smrp);
avl_remove(&daplka_shared_mr_tree, smrp);
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*smrp))
if (smrp->smr_mr_list != NULL) {
/*
* the refcnt is 0. if there is anything
* left on the list, it must be ours.
*/
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*mr_rp))
ASSERT(smrp->smr_mr_list == mr_rp);
DAPLKA_RS_UNREF(mr_rp);
smrp->smr_mr_list = NULL;
ASSERT(mr_rp->mr_shared_mr == smrp);
mr_rp->mr_shared_mr = NULL;
ASSERT(mr_rp->mr_next == NULL);
}
smrp->smr_state = DAPLKA_SMR_FREED;
cv_destroy(&smrp->smr_cv);
kmem_free(smrp, sizeof (daplka_shared_mr_t));
} else {
DERR("mr_register_shared: resetting smr_state "
"smrp 0x%p, %d waiters remain\n", smrp,
smrp->smr_refcnt);
ASSERT(smrp->smr_state == DAPLKA_SMR_TRANSITIONING);
if (smrp->smr_mr_list != NULL && mr_rp != NULL) {
daplka_mr_resource_t **mpp;
/*
* search and remove mr_rp from smr_mr_list
*/
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*mr_rp))
mpp = &smrp->smr_mr_list;
while (*mpp != NULL) {
if (*mpp == mr_rp) {
*mpp = (*mpp)->mr_next;
DAPLKA_RS_UNREF(mr_rp);
ASSERT(mr_rp->mr_shared_mr ==
smrp);
mr_rp->mr_shared_mr = NULL;
mr_rp->mr_next = NULL;
break;
}
mpp = &(*mpp)->mr_next;
}
}
/*
* note that smr_state == READY does not necessarily
* mean that smr_mr_list is non empty. for this case,
* we are doing cleanup because of a failure. we set
* the state to READY to allow other threads to
* continue.
*/
smrp->smr_state = DAPLKA_SMR_READY;
cv_broadcast(&smrp->smr_cv);
}
mutex_exit(&daplka_shared_mr_lock);
}
if (mr_rp != NULL) {
DAPLKA_RS_UNREF(mr_rp);
}
return (retval);
}
/*
* registers a memory region using the attributes of an
* existing region.
*/
/* ARGSUSED */
static int
daplka_mr_register_lmr(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
boolean_t inserted = B_FALSE;
dapl_mr_register_lmr_t args;
ibt_mr_data_in_t mr_cb_data_in;
daplka_mr_resource_t *orig_mr_rp = NULL;
daplka_mr_resource_t *mr_rp;
ibt_smr_attr_t mem_sattr;
uint64_t mr_hkey = 0;
ibt_status_t status;
int retval;
retval = ddi_copyin((void *)arg, &args,
sizeof (dapl_mr_register_lmr_t), mode);
if (retval != 0) {
DERR("mr_register_lmr: copyin error %d\n", retval);
return (EINVAL);
}
orig_mr_rp = (daplka_mr_resource_t *)
daplka_hash_lookup(&ia_rp->ia_mr_htbl, args.mrl_orig_hkey);
if (orig_mr_rp == NULL) {
DERR("mr_register_lmr: cannot find mr resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(orig_mr_rp) == DAPL_TYPE_MR);
mr_rp = kmem_zalloc(sizeof (daplka_mr_resource_t), daplka_km_flags);
if (mr_rp == NULL) {
DERR("mr_register_lmr: cannot allocate mr resource\n");
retval = ENOMEM;
goto cleanup;
}
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*mr_rp))
DAPLKA_RS_INIT(mr_rp, DAPL_TYPE_MR,
DAPLKA_RS_RNUM(ia_rp), daplka_mr_destroy);
mutex_init(&mr_rp->mr_lock, NULL, MUTEX_DRIVER, NULL);
mr_rp->mr_hca = ia_rp->ia_hca;
mr_rp->mr_hca_hdl = ia_rp->ia_hca_hdl;
mr_rp->mr_next = NULL;
mr_rp->mr_shared_mr = NULL;
DAPLKA_RS_REF(orig_mr_rp->mr_pd_res);
mr_rp->mr_pd_res = orig_mr_rp->mr_pd_res;
mr_rp->mr_attr = orig_mr_rp->mr_attr;
/* Pass the IO addr that was returned while allocating the orig MR */
mem_sattr.mr_vaddr = orig_mr_rp->mr_desc.md_vaddr;
mem_sattr.mr_flags = args.mrl_flags | IBT_MR_NOSLEEP;
status = daplka_ibt_register_shared_mr(mr_rp, ia_rp->ia_hca_hdl,
orig_mr_rp->mr_hdl, mr_rp->mr_pd_res->pd_hdl, &mem_sattr,
&mr_rp->mr_hdl, &mr_rp->mr_desc);
if (status != IBT_SUCCESS) {
DERR("mr_register_lmr: ibt_register_shared_mr error %d\n",
status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
mr_cb_data_in.mr_rev = IBT_MR_DATA_IN_IF_VERSION;
mr_cb_data_in.mr_func = daplka_pre_mr_cleanup_callback;
mr_cb_data_in.mr_arg1 = (void *)mr_rp;
mr_cb_data_in.mr_arg2 = NULL;
/* Pass the service driver mr cleanup handler to the hca driver */
status = ibt_ci_data_in(ia_rp->ia_hca_hdl,
IBT_CI_NO_FLAGS, IBT_HDL_MR, (void *)mr_rp->mr_hdl,
&mr_cb_data_in, sizeof (mr_cb_data_in));
if (status != IBT_SUCCESS) {
DERR("mr_register_lmr: ibt_ci_data_in error(%d) ver(%d)",
status, mr_cb_data_in.mr_rev);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
mr_rp->mr_attr.mr_len = orig_mr_rp->mr_attr.mr_len;
mr_rp->mr_attr.mr_flags = mem_sattr.mr_flags;
/* insert into mr hash table */
retval = daplka_hash_insert(&ia_rp->ia_mr_htbl, &mr_hkey,
(void *)mr_rp);
if (retval != 0) {
DERR("mr_register: cannot insert mr resource into mr_htbl\n");
goto cleanup;
}
inserted = B_TRUE;
_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*mr_rp))
args.mrl_lkey = mr_rp->mr_desc.md_lkey;
args.mrl_rkey = mr_rp->mr_desc.md_rkey;
args.mrl_hkey = mr_hkey;
retval = ddi_copyout((void *)&args, (void *)arg,
sizeof (dapl_mr_register_lmr_t), mode);
if (retval != 0) {
DERR("mr_register_lmr: copyout error %d\n", retval);
retval = EFAULT;
goto cleanup;
}
if (orig_mr_rp != NULL) {
DAPLKA_RS_UNREF(orig_mr_rp);
}
return (0);
cleanup:;
if (inserted) {
daplka_mr_resource_t *free_rp = NULL;
(void) daplka_hash_remove(&ia_rp->ia_mr_htbl, mr_hkey,
(void **)&free_rp);
if (free_rp != mr_rp) {
DERR("mr_register: cannot remove mr from hash table\n");
/*
* we can only get here if another thread
* has completed the cleanup in mr_deregister
*/
return (retval);
}
}
if (orig_mr_rp != NULL) {
DAPLKA_RS_UNREF(orig_mr_rp);
}
if (mr_rp != NULL) {
DAPLKA_RS_UNREF(mr_rp);
}
return (retval);
}
/*
* this function is called by mr_deregister and mr_cleanup_callback to
* remove a mr resource from the shared mr object mr_rp->mr_shared_mr.
* if mr_shared_mr is already NULL, that means the region being
* deregistered or invalidated is not a shared mr region and we can
* return immediately.
*/
static void
daplka_shared_mr_free(daplka_mr_resource_t *mr_rp)
{
daplka_shared_mr_t *smrp;
/*
* we need a lock because mr_callback also checks this field.
* for the rare case that mr_deregister and mr_cleanup_callback
* gets called simultaneously, we are guaranteed that smrp won't
* be dereferenced twice because either function will find
* mr_shared_mr to be NULL.
*/
mutex_enter(&mr_rp->mr_lock);
smrp = mr_rp->mr_shared_mr;
mr_rp->mr_shared_mr = NULL;
mutex_exit(&mr_rp->mr_lock);
if (smrp != NULL) {
daplka_mr_resource_t **mpp;
boolean_t mr_found = B_FALSE;
mutex_enter(&daplka_shared_mr_lock);
ASSERT(smrp->smr_refcnt > 0);
while (smrp->smr_state == DAPLKA_SMR_TRANSITIONING) {
cv_wait(&smrp->smr_cv, &daplka_shared_mr_lock);
}
ASSERT(smrp->smr_state == DAPLKA_SMR_READY);
smrp->smr_state = DAPLKA_SMR_TRANSITIONING;
smrp->smr_refcnt--;
/*
* search and remove mr_rp from smr_mr_list.
* also UNREF mr_rp because it is no longer
* on the list.
*/
mpp = &smrp->smr_mr_list;
while (*mpp != NULL) {
if (*mpp == mr_rp) {
*mpp = (*mpp)->mr_next;
DAPLKA_RS_UNREF(mr_rp);
mr_rp->mr_next = NULL;
mr_found = B_TRUE;
break;
}
mpp = &(*mpp)->mr_next;
}
/*
* since mr_clean_callback may not touch smr_mr_list
* at this time (due to smr_state), we can be sure
* that we can find and remove mr_rp from smr_mr_list
*/
ASSERT(mr_found);
if (smrp->smr_refcnt == 0) {
D3("shared_mr_free: freeing smrp 0x%p\n", smrp);
avl_remove(&daplka_shared_mr_tree, smrp);
ASSERT(smrp->smr_mr_list == NULL);
smrp->smr_state = DAPLKA_SMR_FREED;
cv_destroy(&smrp->smr_cv);
kmem_free(smrp, sizeof (daplka_shared_mr_t));
} else {
D3("shared_mr_free: smrp 0x%p, refcnt %d\n",
smrp, smrp->smr_refcnt);
smrp->smr_state = DAPLKA_SMR_READY;
cv_broadcast(&smrp->smr_cv);
}
mutex_exit(&daplka_shared_mr_lock);
}
}
/*
* deregisters a memory region.
* if mr is shared, remove reference from global shared mr object.
* release the initial reference to the mr. if the mr's refcnt is
* zero, call mr_destroy to free mr.
*/
/* ARGSUSED */
static int
daplka_mr_deregister(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_mr_resource_t *mr_rp;
dapl_mr_deregister_t args;
int retval;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_mr_deregister_t),
mode);
if (retval != 0) {
DERR("mr_deregister: copyin error %d\n", retval);
return (EINVAL);
}
retval = daplka_hash_remove(&ia_rp->ia_mr_htbl,
args.mrd_hkey, (void **)&mr_rp);
if (retval != 0 || mr_rp == NULL) {
DERR("mr_deregister: cannot find mr resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(mr_rp) == DAPL_TYPE_MR);
daplka_shared_mr_free(mr_rp);
DAPLKA_RS_UNREF(mr_rp);
return (0);
}
/*
* sync local memory regions on RDMA read or write.
*/
/* ARGSUSED */
static int
daplka_mr_sync(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
dapl_mr_sync_t args;
daplka_mr_resource_t *mr_rp[DAPL_MR_PER_SYNC];
ibt_mr_sync_t mrs[DAPL_MR_PER_SYNC];
uint32_t sync_direction_flags;
ibt_status_t status;
int i, j;
int retval;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_mr_sync_t), mode);
if (retval != 0) {
DERR("mr_sync: copyin error %d\n", retval);
return (EFAULT);
}
/* number of segments bound check */
if (args.mrs_numseg > DAPL_MR_PER_SYNC) {
DERR("mr_sync: number of segments too large\n");
return (EINVAL);
}
/* translate MR sync direction flag */
if (args.mrs_flags == DAPL_MR_SYNC_RDMA_RD) {
sync_direction_flags = IBT_SYNC_READ;
} else if (args.mrs_flags == DAPL_MR_SYNC_RDMA_WR) {
sync_direction_flags = IBT_SYNC_WRITE;
} else {
DERR("mr_sync: unknown flags\n");
return (EINVAL);
}
/*
* all the segments are going to be sync'd by ibtl together
*/
for (i = 0; i < args.mrs_numseg; i++) {
mr_rp[i] = (daplka_mr_resource_t *)daplka_hash_lookup(
&ia_rp->ia_mr_htbl, args.mrs_vec[i].mrsv_hkey);
if (mr_rp[i] == NULL) {
for (j = 0; j < i; j++) {
DAPLKA_RS_UNREF(mr_rp[j]);
}
DERR("mr_sync: lookup error\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(mr_rp[i]) == DAPL_TYPE_MR);
mrs[i].ms_handle = mr_rp[i]->mr_hdl;
mrs[i].ms_vaddr = args.mrs_vec[i].mrsv_va;
mrs[i].ms_len = args.mrs_vec[i].mrsv_len;
mrs[i].ms_flags = sync_direction_flags;
}
status = ibt_sync_mr(ia_rp->ia_hca_hdl, mrs, args.mrs_numseg);
if (status != IBT_SUCCESS) {
DERR("mr_sync: ibt_sync_mr error %d\n", status);
*rvalp = (int)status;
}
for (i = 0; i < args.mrs_numseg; i++) {
DAPLKA_RS_UNREF(mr_rp[i]);
}
return (0);
}
/*
* destroys a memory region.
* called when refcnt drops to zero.
*/
static int
daplka_mr_destroy(daplka_resource_t *gen_rp)
{
daplka_mr_resource_t *mr_rp = (daplka_mr_resource_t *)gen_rp;
ibt_status_t status;
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*mr_rp))
ASSERT(DAPLKA_RS_REFCNT(mr_rp) == 0);
ASSERT(mr_rp->mr_shared_mr == NULL);
D3("mr_destroy: entering, mr_rp 0x%p, rnum %d\n",
mr_rp, DAPLKA_RS_RNUM(mr_rp));
/*
* deregister mr
*/
if (mr_rp->mr_hdl) {
status = daplka_ibt_deregister_mr(mr_rp, mr_rp->mr_hca_hdl,
mr_rp->mr_hdl);
if (status != IBT_SUCCESS) {
DERR("mr_destroy: ibt_deregister_mr returned %d\n",
status);
}
mr_rp->mr_hdl = NULL;
D3("mr_destroy: mr deregistered\n");
}
mr_rp->mr_attr.mr_vaddr = NULL;
/*
* release reference on PD
*/
if (mr_rp->mr_pd_res != NULL) {
DAPLKA_RS_UNREF(mr_rp->mr_pd_res);
mr_rp->mr_pd_res = NULL;
}
mutex_destroy(&mr_rp->mr_lock);
DAPLKA_RS_FINI(mr_rp);
kmem_free(mr_rp, sizeof (daplka_mr_resource_t));
D3("mr_destroy: exiting, mr_rp 0x%p\n", mr_rp);
return (0);
}
/*
* this function is called by daplka_hash_destroy for
* freeing MR resource objects
*/
static void
daplka_hash_mr_free(void *obj)
{
daplka_mr_resource_t *mr_rp = (daplka_mr_resource_t *)obj;
daplka_shared_mr_free(mr_rp);
DAPLKA_RS_UNREF(mr_rp);
}
/*
* comparison function used for finding a shared mr object
* from the global shared mr avl tree.
*/
static int
daplka_shared_mr_cmp(const void *smr1, const void *smr2)
{
daplka_shared_mr_t *s1 = (daplka_shared_mr_t *)smr1;
daplka_shared_mr_t *s2 = (daplka_shared_mr_t *)smr2;
int i;
for (i = 4; i >= 0; i--) {
if (s1->smr_cookie.mc_uint_arr[i] <
s2->smr_cookie.mc_uint_arr[i]) {
return (-1);
}
if (s1->smr_cookie.mc_uint_arr[i] >
s2->smr_cookie.mc_uint_arr[i]) {
return (1);
}
}
return (0);
}
/*
* allocates a protection domain.
*/
/* ARGSUSED */
static int
daplka_pd_alloc(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
dapl_pd_alloc_t args;
daplka_pd_resource_t *pd_rp;
ibt_status_t status;
uint64_t pd_hkey = 0;
boolean_t inserted = B_FALSE;
int retval;
pd_rp = kmem_zalloc(sizeof (*pd_rp), daplka_km_flags);
if (pd_rp == NULL) {
DERR("pd_alloc: cannot allocate pd resource\n");
return (ENOMEM);
}
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*pd_rp))
DAPLKA_RS_INIT(pd_rp, DAPL_TYPE_PD,
DAPLKA_RS_RNUM(ia_rp), daplka_pd_destroy);
pd_rp->pd_hca = ia_rp->ia_hca;
pd_rp->pd_hca_hdl = ia_rp->ia_hca_hdl;
status = daplka_ibt_alloc_pd(pd_rp, pd_rp->pd_hca_hdl,
IBT_PD_NO_FLAGS, &pd_rp->pd_hdl);
if (status != IBT_SUCCESS) {
DERR("pd_alloc: ibt_alloc_pd returned %d\n", status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
/* insert into pd hash table */
retval = daplka_hash_insert(&ia_rp->ia_pd_htbl,
&pd_hkey, (void *)pd_rp);
if (retval != 0) {
DERR("pd_alloc: cannot insert pd resource into pd_htbl\n");
goto cleanup;
}
inserted = B_TRUE;
_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*pd_rp))
/* return hkey to library */
args.pda_hkey = pd_hkey;
retval = ddi_copyout(&args, (void *)arg, sizeof (dapl_pd_alloc_t),
mode);
if (retval != 0) {
DERR("pd_alloc: copyout error %d\n", retval);
retval = EFAULT;
goto cleanup;
}
return (0);
cleanup:;
if (inserted) {
daplka_pd_resource_t *free_rp = NULL;
(void) daplka_hash_remove(&ia_rp->ia_pd_htbl, pd_hkey,
(void **)&free_rp);
if (free_rp != pd_rp) {
DERR("pd_alloc: cannot remove pd from hash table\n");
/*
* we can only get here if another thread
* has completed the cleanup in pd_free
*/
return (retval);
}
}
DAPLKA_RS_UNREF(pd_rp);
return (retval);
}
/*
* destroys a protection domain.
* called when refcnt drops to zero.
*/
static int
daplka_pd_destroy(daplka_resource_t *gen_rp)
{
daplka_pd_resource_t *pd_rp = (daplka_pd_resource_t *)gen_rp;
ibt_status_t status;
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*pd_rp))
ASSERT(DAPLKA_RS_REFCNT(pd_rp) == 0);
D3("pd_destroy: entering, pd_rp %p, rnum %d\n",
pd_rp, DAPLKA_RS_RNUM(pd_rp));
ASSERT(DAPLKA_RS_TYPE(pd_rp) == DAPL_TYPE_PD);
if (pd_rp->pd_hdl != NULL) {
status = daplka_ibt_free_pd(pd_rp, pd_rp->pd_hca_hdl,
pd_rp->pd_hdl);
if (status != IBT_SUCCESS) {
DERR("pd_destroy: ibt_free_pd returned %d\n", status);
}
}
DAPLKA_RS_FINI(pd_rp);
kmem_free(pd_rp, sizeof (daplka_pd_resource_t));
D3("pd_destroy: exiting, pd_rp %p\n", pd_rp);
return (0);
}
static void
daplka_hash_pd_free(void *obj)
{
daplka_pd_resource_t *pd_rp = (daplka_pd_resource_t *)obj;
ASSERT(DAPLKA_RS_TYPE(pd_rp) == DAPL_TYPE_PD);
DAPLKA_RS_UNREF(pd_rp);
}
/*
* removes the pd reference from ia_pd_htbl and releases the
* initial reference to the pd. also destroys the pd if the refcnt
* is zero.
*/
/* ARGSUSED */
static int
daplka_pd_free(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_pd_resource_t *pd_rp;
dapl_pd_free_t args;
int retval;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_pd_free_t), mode);
if (retval != 0) {
DERR("pd_free: copyin error %d\n", retval);
return (EINVAL);
}
retval = daplka_hash_remove(&ia_rp->ia_pd_htbl,
args.pdf_hkey, (void **)&pd_rp);
if (retval != 0 || pd_rp == NULL) {
DERR("pd_free: cannot find pd resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(pd_rp) == DAPL_TYPE_PD);
/* UNREF calls the actual free function when refcnt is zero */
DAPLKA_RS_UNREF(pd_rp);
return (0);
}
/*
* allocates a memory window
*/
/* ARGSUSED */
static int
daplka_mw_alloc(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_pd_resource_t *pd_rp;
daplka_mw_resource_t *mw_rp;
dapl_mw_alloc_t args;
ibt_status_t status;
boolean_t inserted = B_FALSE;
uint64_t mw_hkey;
ibt_rkey_t mw_rkey;
int retval;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_mw_alloc_t), mode);
if (retval != 0) {
DERR("mw_alloc: copyin error %d\n", retval);
return (EFAULT);
}
/*
* Allocate and initialize a MW resource
*/
mw_rp = kmem_zalloc(sizeof (daplka_mw_resource_t), daplka_km_flags);
if (mw_rp == NULL) {
DERR("mw_alloc: cannot allocate mw resource\n");
return (ENOMEM);
}
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*mw_rp))
DAPLKA_RS_INIT(mw_rp, DAPL_TYPE_MW,
DAPLKA_RS_RNUM(ia_rp), daplka_mw_destroy);
mutex_init(&mw_rp->mw_lock, NULL, MUTEX_DRIVER, NULL);
mw_rp->mw_hca = ia_rp->ia_hca;
mw_rp->mw_hca_hdl = ia_rp->ia_hca_hdl;
/* get pd handle */
pd_rp = (daplka_pd_resource_t *)
daplka_hash_lookup(&ia_rp->ia_pd_htbl, args.mw_pd_hkey);
if (pd_rp == NULL) {
DERR("mw_alloc: cannot find pd resource\n");
goto cleanup;
}
ASSERT(DAPLKA_RS_TYPE(pd_rp) == DAPL_TYPE_PD);
mw_rp->mw_pd_res = pd_rp;
status = daplka_ibt_alloc_mw(mw_rp, mw_rp->mw_hca_hdl,
pd_rp->pd_hdl, IBT_MW_NOSLEEP, &mw_rp->mw_hdl, &mw_rkey);
if (status != IBT_SUCCESS) {
DERR("mw_alloc: ibt_alloc_mw returned %d\n", status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
mutex_enter(&ia_rp->ia_lock);
switch (ia_rp->ia_state) {
case DAPLKA_IA_INIT:
ia_rp->ia_state = DAPLKA_IA_MW_ALLOC_IN_PROGRESS;
ia_rp->ia_mw_alloccnt++;
retval = 0;
break;
case DAPLKA_IA_MW_ALLOC_IN_PROGRESS:
/* another mw_alloc is already in progress increase cnt */
ia_rp->ia_mw_alloccnt++;
retval = 0;
break;
case DAPLKA_IA_MW_FREEZE_IN_PROGRESS:
/* FALLTHRU */
case DAPLKA_IA_MW_FROZEN:
/*
* IA is being or already frozen don't allow more MWs to be
* allocated.
*/
DERR("mw_alloc: IA is freezing MWs (state=%d)\n",
ia_rp->ia_state);
retval = EINVAL;
break;
default:
ASSERT(!"Invalid IA state in mw_alloc");
DERR("mw_alloc: IA state=%d invalid\n", ia_rp->ia_state);
retval = EINVAL;
break;
}
mutex_exit(&ia_rp->ia_lock);
/* retval is 0 when ia_mw_alloccnt is incremented */
if (retval != 0) {
goto cleanup;
}
/* insert into mw hash table */
mw_hkey = 0;
retval = daplka_hash_insert(&ia_rp->ia_mw_htbl, &mw_hkey,
(void *)mw_rp);
if (retval != 0) {
DERR("mw_alloc: cannot insert mw resource into mw_htbl\n");
mutex_enter(&ia_rp->ia_lock);
ASSERT(ia_rp->ia_state == DAPLKA_IA_MW_ALLOC_IN_PROGRESS);
ia_rp->ia_mw_alloccnt--;
if (ia_rp->ia_mw_alloccnt == 0) {
ia_rp->ia_state = DAPLKA_IA_INIT;
cv_broadcast(&ia_rp->ia_cv);
}
mutex_exit(&ia_rp->ia_lock);
goto cleanup;
}
inserted = B_TRUE;
_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*mw_rp))
D3("mw_alloc: ibt_alloc_mw mw_hdl(%p) mw_rkey(0x%llx)\n",
mw_rp->mw_hdl, (longlong_t)mw_rkey);
mutex_enter(&ia_rp->ia_lock);
/*
* We are done with mw_alloc if this was the last mw_alloc
* change state back to DAPLKA_IA_INIT and wake up waiters
* specifically the unlock callback.
*/
ASSERT(ia_rp->ia_state == DAPLKA_IA_MW_ALLOC_IN_PROGRESS);
ia_rp->ia_mw_alloccnt--;
if (ia_rp->ia_mw_alloccnt == 0) {
ia_rp->ia_state = DAPLKA_IA_INIT;
cv_broadcast(&ia_rp->ia_cv);
}
mutex_exit(&ia_rp->ia_lock);
args.mw_hkey = mw_hkey;
args.mw_rkey = mw_rkey;
retval = ddi_copyout(&args, (void *)arg, sizeof (dapl_mw_alloc_t),
mode);
if (retval != 0) {
DERR("mw_alloc: copyout error %d\n", retval);
retval = EFAULT;
goto cleanup;
}
return (0);
cleanup:;
if (inserted) {
daplka_mw_resource_t *free_rp = NULL;
(void) daplka_hash_remove(&ia_rp->ia_mw_htbl, mw_hkey,
(void **)&free_rp);
if (free_rp != mw_rp) {
DERR("mw_alloc: cannot remove mw from hash table\n");
/*
* we can only get here if another thread
* has completed the cleanup in mw_free
*/
return (retval);
}
}
DAPLKA_RS_UNREF(mw_rp);
return (retval);
}
/*
* removes the mw reference from ia_mw_htbl and releases the
* initial reference to the mw. also destroys the mw if the refcnt
* is zero.
*/
/* ARGSUSED */
static int
daplka_mw_free(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_mw_resource_t *mw_rp = NULL;
dapl_mw_free_t args;
int retval = 0;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_mw_free_t), mode);
if (retval != 0) {
DERR("mw_free: copyin error %d\n", retval);
return (EFAULT);
}
retval = daplka_hash_remove(&ia_rp->ia_mw_htbl, args.mw_hkey,
(void **)&mw_rp);
if (retval != 0 || mw_rp == NULL) {
DERR("mw_free: cannot find mw resrc (0x%llx)\n",
(longlong_t)args.mw_hkey);
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(mw_rp) == DAPL_TYPE_MW);
/* UNREF calls the actual free function when refcnt is zero */
DAPLKA_RS_UNREF(mw_rp);
return (retval);
}
/*
* destroys the memory window.
* called when refcnt drops to zero.
*/
static int
daplka_mw_destroy(daplka_resource_t *gen_rp)
{
daplka_mw_resource_t *mw_rp = (daplka_mw_resource_t *)gen_rp;
ibt_status_t status;
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*mw_rp))
ASSERT(DAPLKA_RS_REFCNT(mw_rp) == 0);
D3("mw_destroy: entering, mw_rp 0x%p, rnum %d\n",
mw_rp, DAPLKA_RS_RNUM(mw_rp));
/*
* free memory window
*/
if (mw_rp->mw_hdl) {
status = daplka_ibt_free_mw(mw_rp, mw_rp->mw_hca_hdl,
mw_rp->mw_hdl);
if (status != IBT_SUCCESS) {
DERR("mw_destroy: ibt_free_mw returned %d\n", status);
}
mw_rp->mw_hdl = NULL;
D3("mw_destroy: mw freed\n");
}
/*
* release reference on PD
*/
if (mw_rp->mw_pd_res != NULL) {
DAPLKA_RS_UNREF(mw_rp->mw_pd_res);
mw_rp->mw_pd_res = NULL;
}
mutex_destroy(&mw_rp->mw_lock);
DAPLKA_RS_FINI(mw_rp);
kmem_free(mw_rp, sizeof (daplka_mw_resource_t));
D3("mw_destroy: exiting, mw_rp 0x%p\n", mw_rp);
return (0);
}
static void
daplka_hash_mw_free(void *obj)
{
daplka_mw_resource_t *mw_rp = (daplka_mw_resource_t *)obj;
ASSERT(DAPLKA_RS_TYPE(mw_rp) == DAPL_TYPE_MW);
DAPLKA_RS_UNREF(mw_rp);
}
/*
* SRQ ioctls and supporting functions
*/
/* ARGSUSED */
static int
daplka_srq_create(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_srq_resource_t *srq_rp;
daplka_pd_resource_t *pd_rp;
dapl_srq_create_t args;
ibt_srq_sizes_t srq_sizes;
ibt_srq_sizes_t srq_real_sizes;
ibt_hca_attr_t *hca_attrp;
uint64_t srq_hkey = 0;
boolean_t inserted = B_FALSE;
int retval;
ibt_status_t status;
D3("srq_create: enter\n");
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_srq_create_t),
mode);
if (retval != 0) {
DERR("srq_create: copyin error %d\n", retval);
return (EFAULT);
}
srq_rp = kmem_zalloc(sizeof (daplka_srq_resource_t), daplka_km_flags);
if (srq_rp == NULL) {
DERR("srq_create: cannot allocate ep_rp\n");
return (ENOMEM);
}
DAPLKA_RS_INIT(srq_rp, DAPL_TYPE_SRQ,
DAPLKA_RS_RNUM(ia_rp), daplka_srq_destroy);
srq_rp->srq_hca = ia_rp->ia_hca;
srq_rp->srq_hca_hdl = ia_rp->ia_hca_hdl;
mutex_init(&srq_rp->srq_lock, NULL, MUTEX_DRIVER, NULL);
/* get pd handle */
pd_rp = (daplka_pd_resource_t *)
daplka_hash_lookup(&ia_rp->ia_pd_htbl, args.srqc_pd_hkey);
if (pd_rp == NULL) {
DERR("srq_create: cannot find pd resource\n");
retval = EINVAL;
goto cleanup;
}
ASSERT(DAPLKA_RS_TYPE(pd_rp) == DAPL_TYPE_PD);
srq_rp->srq_pd_res = pd_rp;
/*
* these checks ensure that the requested SRQ sizes
* are within the limits supported by the chosen HCA.
*/
hca_attrp = &ia_rp->ia_hca->hca_attr;
if (args.srqc_sizes.srqs_sz > hca_attrp->hca_max_srqs_sz) {
DERR("srq_create: invalid srqs_sz %d\n",
args.srqc_sizes.srqs_sz);
retval = EINVAL;
goto cleanup;
}
if (args.srqc_sizes.srqs_sgl > hca_attrp->hca_max_srq_sgl) {
DERR("srq_create: invalid srqs_sgl %d\n",
args.srqc_sizes.srqs_sgl);
retval = EINVAL;
goto cleanup;
}
D3("srq_create: srq_sgl %d, srq_sz %d\n",
args.srqc_sizes.srqs_sgl, args.srqc_sizes.srqs_sz);
srq_sizes.srq_wr_sz = args.srqc_sizes.srqs_sz;
srq_sizes.srq_sgl_sz = args.srqc_sizes.srqs_sgl;
/* create srq */
status = daplka_ibt_alloc_srq(srq_rp, ia_rp->ia_hca_hdl,
IBT_SRQ_USER_MAP, pd_rp->pd_hdl, &srq_sizes, &srq_rp->srq_hdl,
&srq_real_sizes);
if (status != IBT_SUCCESS) {
DERR("srq_create: alloc_srq returned %d\n", status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
args.srqc_real_sizes.srqs_sz = srq_real_sizes.srq_wr_sz;
args.srqc_real_sizes.srqs_sgl = srq_real_sizes.srq_sgl_sz;
/* Get HCA-specific data_out info */
status = ibt_ci_data_out(ia_rp->ia_hca_hdl,
IBT_CI_NO_FLAGS, IBT_HDL_SRQ, (void *)srq_rp->srq_hdl,
&args.srqc_data_out, sizeof (args.srqc_data_out));
if (status != IBT_SUCCESS) {
DERR("srq_create: ibt_ci_data_out error(%d)\n", status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
srq_rp->srq_real_size = srq_real_sizes.srq_wr_sz;
/* preparing to copyout map_data back to the library */
args.srqc_real_sizes.srqs_sz = srq_real_sizes.srq_wr_sz;
args.srqc_real_sizes.srqs_sgl = srq_real_sizes.srq_sgl_sz;
/* insert into srq hash table */
retval = daplka_hash_insert(&ia_rp->ia_srq_htbl,
&srq_hkey, (void *)srq_rp);
if (retval != 0) {
DERR("srq_create: cannot insert srq resource into srq_htbl\n");
goto cleanup;
}
inserted = B_TRUE;
/* return hkey to library */
args.srqc_hkey = srq_hkey;
retval = ddi_copyout(&args, (void *)arg, sizeof (dapl_srq_create_t),
mode);
if (retval != 0) {
DERR("srq_create: copyout error %d\n", retval);
retval = EFAULT;
goto cleanup;
}
D3("srq_create: %p, 0x%llx\n", srq_rp->srq_hdl, (longlong_t)srq_hkey);
D3(" sz(%d) sgl(%d)\n",
args.srqc_real_sizes.srqs_sz, args.srqc_real_sizes.srqs_sgl);
D3("srq_create: exit\n");
return (0);
cleanup:
if (inserted) {
daplka_srq_resource_t *free_rp = NULL;
(void) daplka_hash_remove(&ia_rp->ia_srq_htbl, srq_hkey,
(void **)&free_rp);
if (free_rp != srq_rp) {
/*
* this case is impossible because ep_free will
* wait until our state transition is complete.
*/
DERR("srq_create: cannot remove srq from hash table\n");
ASSERT(B_FALSE);
return (retval);
}
}
DAPLKA_RS_UNREF(srq_rp);
return (retval);
}
/*
* Resize an existing SRQ
*/
/* ARGSUSED */
static int
daplka_srq_resize(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_srq_resource_t *srq_rp = NULL;
ibt_hca_attr_t *hca_attrp;
dapl_srq_resize_t args;
ibt_status_t status;
int retval = 0;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_srq_resize_t),
mode);
if (retval != 0) {
DERR("srq_resize: copyin error %d\n", retval);
return (EFAULT);
}
/* get srq resource */
srq_rp = (daplka_srq_resource_t *)
daplka_hash_lookup(&ia_rp->ia_srq_htbl, args.srqr_hkey);
if (srq_rp == NULL) {
DERR("srq_resize: cannot find srq resource\n");
return (EINVAL);
}
ASSERT(DAPLKA_RS_TYPE(srq_rp) == DAPL_TYPE_SRQ);
hca_attrp = &ia_rp->ia_hca->hca_attr;
if (args.srqr_new_size > hca_attrp->hca_max_srqs_sz) {
DERR("srq_resize: invalid srq size %d", args.srqr_new_size);
retval = EINVAL;
goto cleanup;
}
mutex_enter(&srq_rp->srq_lock);
/*
* If ibt_resize_srq fails that it is primarily due to resource
* shortage. Per IB spec resize will never loose events and
* a resize error leaves the SRQ intact. Therefore even if the
* resize request fails we proceed and get the mapping data
* from the SRQ so that the library can mmap it.
*/
status = ibt_modify_srq(srq_rp->srq_hdl, IBT_SRQ_SET_SIZE,
args.srqr_new_size, 0, &args.srqr_real_size);
if (status != IBT_SUCCESS) {
/* we return the size of the old CQ if resize fails */
args.srqr_real_size = srq_rp->srq_real_size;
ASSERT(status != IBT_SRQ_HDL_INVALID);
DERR("srq_resize: ibt_modify_srq failed:%d\n", status);
} else {
srq_rp->srq_real_size = args.srqr_real_size;
}
mutex_exit(&srq_rp->srq_lock);
D2("srq_resize(%d): done new_sz(%u) real_sz(%u)\n",
DAPLKA_RS_RNUM(srq_rp), args.srqr_new_size, args.srqr_real_size);
/* Get HCA-specific data_out info */
status = ibt_ci_data_out(srq_rp->srq_hca_hdl,
IBT_CI_NO_FLAGS, IBT_HDL_SRQ, (void *)srq_rp->srq_hdl,
&args.srqr_data_out, sizeof (args.srqr_data_out));
if (status != IBT_SUCCESS) {
DERR("srq_resize: ibt_ci_data_out error(%d)\n", status);
/* return ibt_ci_data_out status */
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
retval = ddi_copyout(&args, (void *)arg, sizeof (dapl_srq_resize_t),
mode);
if (retval != 0) {
DERR("srq_resize: copyout error %d\n", retval);
retval = EFAULT;
goto cleanup;
}
cleanup:;
if (srq_rp != NULL) {
DAPLKA_RS_UNREF(srq_rp);
}
return (retval);
}
/*
* Frees an SRQ resource.
*/
/* ARGSUSED */
static int
daplka_srq_free(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_srq_resource_t *srq_rp = NULL;
dapl_srq_free_t args;
int retval;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_srq_free_t), mode);
if (retval != 0) {
DERR("srq_free: copyin error %d\n", retval);
return (EFAULT);
}
retval = daplka_hash_remove(&ia_rp->ia_srq_htbl,
args.srqf_hkey, (void **)&srq_rp);
if (retval != 0 || srq_rp == NULL) {
/*
* this is only possible if we have two threads
* calling ep_free in parallel.
*/
DERR("srq_free: cannot find resource retval(%d) 0x%llx\n",
retval, args.srqf_hkey);
return (EINVAL);
}
/* UNREF calls the actual free function when refcnt is zero */
DAPLKA_RS_UNREF(srq_rp);
return (0);
}
/*
* destroys a SRQ resource.
* called when refcnt drops to zero.
*/
static int
daplka_srq_destroy(daplka_resource_t *gen_rp)
{
daplka_srq_resource_t *srq_rp = (daplka_srq_resource_t *)gen_rp;
ibt_status_t status;
ASSERT(DAPLKA_RS_REFCNT(srq_rp) == 0);
D3("srq_destroy: entering, srq_rp 0x%p, rnum %d\n",
srq_rp, DAPLKA_RS_RNUM(srq_rp));
/*
* destroy the srq
*/
if (srq_rp->srq_hdl != NULL) {
status = daplka_ibt_free_srq(srq_rp, srq_rp->srq_hdl);
if (status != IBT_SUCCESS) {
DERR("srq_destroy: ibt_free_srq returned %d\n",
status);
}
srq_rp->srq_hdl = NULL;
D3("srq_destroy: srq freed, rnum %d\n", DAPLKA_RS_RNUM(srq_rp));
}
/*
* release all references
*/
if (srq_rp->srq_pd_res != NULL) {
DAPLKA_RS_UNREF(srq_rp->srq_pd_res);
srq_rp->srq_pd_res = NULL;
}
mutex_destroy(&srq_rp->srq_lock);
DAPLKA_RS_FINI(srq_rp);
kmem_free(srq_rp, sizeof (daplka_srq_resource_t));
D3("srq_destroy: exiting, srq_rp 0x%p\n", srq_rp);
return (0);
}
static void
daplka_hash_srq_free(void *obj)
{
daplka_srq_resource_t *srq_rp = (daplka_srq_resource_t *)obj;
ASSERT(DAPLKA_RS_TYPE(srq_rp) == DAPL_TYPE_SRQ);
DAPLKA_RS_UNREF(srq_rp);
}
/*
* This function tells the CM to start listening on a service id.
* It must be called by the passive side client before the client
* can receive connection requests from remote endpoints. If the
* client specifies a non-zero service id (connection qualifier in
* dapl terms), this function will attempt to bind to this service
* id and return an error if the id is already in use. If the client
* specifies zero as the service id, this function will try to find
* the next available service id and return it back to the client.
* To support the cr_handoff function, this function will, in addition
* to creating and inserting an SP resource into the per-IA SP hash
* table, insert the SP resource into a global SP table. This table
* maintains all active service points created by all dapl clients.
* CR handoff locates the target SP by iterating through this global
* table.
*/
/* ARGSUSED */
static int
daplka_service_register(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_evd_resource_t *evd_rp = NULL;
daplka_sp_resource_t *sp_rp = NULL;
dapl_service_register_t args;
ibt_srv_desc_t sd_args;
ibt_srv_bind_t sb_args;
ibt_status_t status;
ib_svc_id_t retsid = 0;
uint64_t sp_hkey = 0;
boolean_t bumped = B_FALSE;
int backlog_size;
int retval = 0;
retval = ddi_copyin((void *)arg, &args,
sizeof (dapl_service_register_t), mode);
if (retval != 0) {
DERR("service_register: copyin error %d\n", retval);
return (EINVAL);
}
sp_rp = kmem_zalloc(sizeof (*sp_rp), daplka_km_flags);
if (sp_rp == NULL) {
DERR("service_register: cannot allocate sp resource\n");
return (ENOMEM);
}
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*sp_rp))
DAPLKA_RS_INIT(sp_rp, DAPL_TYPE_SP,
DAPLKA_RS_RNUM(ia_rp), daplka_sp_destroy);
/* check if evd exists */
evd_rp = (daplka_evd_resource_t *)
daplka_hash_lookup(&ia_rp->ia_evd_htbl, args.sr_evd_hkey);
if (evd_rp == NULL) {
DERR("service_register: evd resource not found\n");
retval = EINVAL;
goto cleanup;
}
/*
* initialize backlog size
*/
if (evd_rp && evd_rp->evd_cq_real_size > 0) {
backlog_size = evd_rp->evd_cq_real_size + 1;
} else {
backlog_size = DAPLKA_DEFAULT_SP_BACKLOG;
}
D2("service_register: args.sr_sid = %llu\n", (longlong_t)args.sr_sid);
/* save the userland sp ptr */
sp_rp->sp_cookie = args.sr_sp_cookie;
sp_rp->sp_backlog_size = backlog_size;
D3("service_register: backlog set to %d\n", sp_rp->sp_backlog_size);
sp_rp->sp_backlog = kmem_zalloc(sp_rp->sp_backlog_size *
sizeof (daplka_sp_conn_pend_t), daplka_km_flags);
/* save evd resource pointer */
sp_rp->sp_evd_res = evd_rp;
/*
* save ruid here so that we can do a comparison later
* when someone does cr_handoff. the check will prevent
* a malicious app from passing a CR to us.
*/
sp_rp->sp_ruid = crgetruid(cred);
/* fill in args for register_service */
sd_args.sd_ud_handler = NULL;
sd_args.sd_handler = daplka_cm_service_handler;
sd_args.sd_flags = IBT_SRV_NO_FLAGS;
status = ibt_register_service(daplka_dev->daplka_clnt_hdl,
&sd_args, args.sr_sid, 1, &sp_rp->sp_srv_hdl, &retsid);
if (status != IBT_SUCCESS) {
DERR("service_register: ibt_register_service returned %d\n",
status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
/* save returned sid */
sp_rp->sp_conn_qual = retsid;
args.sr_retsid = retsid;
/* fill in args for bind_service */
sb_args.sb_pkey = ia_rp->ia_port_pkey;
sb_args.sb_lease = 0xffffffff;
sb_args.sb_key[0] = 0x1234;
sb_args.sb_key[1] = 0x5678;
sb_args.sb_name = DAPLKA_DRV_NAME;
D2("service_register: bind(0x%llx:0x%llx)\n",
(longlong_t)ia_rp->ia_hca_sgid.gid_prefix,
(longlong_t)ia_rp->ia_hca_sgid.gid_guid);
status = ibt_bind_service(sp_rp->sp_srv_hdl, ia_rp->ia_hca_sgid,
&sb_args, (void *)sp_rp, &sp_rp->sp_bind_hdl);
if (status != IBT_SUCCESS) {
DERR("service_register: ibt_bind_service returned %d\n",
status);
*rvalp = (int)status;
retval = 0;
goto cleanup;
}
/*
* need to bump refcnt because the global hash table will
* have a reference to sp_rp
*/
DAPLKA_RS_REF(sp_rp);
bumped = B_TRUE;
/* insert into global sp hash table */
sp_rp->sp_global_hkey = 0;
retval = daplka_hash_insert(&daplka_global_sp_htbl,
&sp_rp->sp_global_hkey, (void *)sp_rp);
if (retval != 0) {
DERR("service_register: cannot insert sp resource\n");
goto cleanup;
}
_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*sp_rp))
/* insert into per-IA sp hash table */
retval = daplka_hash_insert(&ia_rp->ia_sp_htbl,
&sp_hkey, (void *)sp_rp);
if (retval != 0) {
DERR("service_register: cannot insert sp resource\n");
goto cleanup;
}
/* pass index to application */
args.sr_sp_hkey = sp_hkey;
retval = ddi_copyout(&args, (void *)arg,
sizeof (dapl_service_register_t), mode);
if (retval != 0) {
DERR("service_register: copyout error %d\n", retval);
retval = EFAULT;
goto cleanup;
}
return (0);
cleanup:;
ASSERT(sp_rp != NULL);
/* remove from ia table */
if (sp_hkey != 0) {
daplka_sp_resource_t *free_rp = NULL;
(void) daplka_hash_remove(&ia_rp->ia_sp_htbl,
sp_hkey, (void **)&free_rp);
if (free_rp != sp_rp) {
DERR("service_register: cannot remove sp\n");
/*
* we can only get here if another thread
* has completed the cleanup in svc_deregister
*/
return (retval);
}
}
/* remove from global table */
if (sp_rp->sp_global_hkey != 0) {
daplka_sp_resource_t *free_rp = NULL;
/*
* we get here if either the hash_insert into
* ia_sp_htbl failed or the ddi_copyout failed.
* hash_insert failure implies that we are the
* only thread with a reference to sp. ddi_copyout
* failure implies that svc_deregister could have
* picked up the sp and destroyed it. but since
* we got to this point, we must have removed
* the sp ourselves in hash_remove above and
* that the sp can be destroyed by us.
*/
(void) daplka_hash_remove(&daplka_global_sp_htbl,
sp_rp->sp_global_hkey, (void **)&free_rp);
if (free_rp != sp_rp) {
DERR("service_register: cannot remove sp\n");
/*
* this case is impossible. see explanation above.
*/
ASSERT(B_FALSE);
return (retval);
}
sp_rp->sp_global_hkey = 0;
}
/* unreference sp */
if (bumped) {
DAPLKA_RS_UNREF(sp_rp);
}
/* destroy sp resource */
DAPLKA_RS_UNREF(sp_rp);
return (retval);
}
/*
* deregisters the service and removes SP from the global table.
*/
/* ARGSUSED */
static int
daplka_service_deregister(daplka_ia_resource_t *ia_rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
dapl_service_deregister_t args;
daplka_sp_resource_t *sp_rp = NULL, *g_sp_rp = NULL;
int retval;
retval = ddi_copyin((void *)arg, &args,
sizeof (dapl_service_deregister_t), mode);
if (retval != 0) {
DERR("service_deregister: copyin error %d\n", retval);
return (EINVAL);
}
retval = daplka_hash_remove(&ia_rp->ia_sp_htbl,
args.sdr_sp_hkey, (void **)&sp_rp);
if (retval != 0 || sp_rp == NULL) {
DERR("service_deregister: cannot find sp resource\n");
return (EINVAL);
}
retval = daplka_hash_remove(&daplka_global_sp_htbl,
sp_rp->sp_global_hkey, (void **)&g_sp_rp);
if (retval != 0 || g_sp_rp == NULL) {
DERR("service_deregister: cannot find sp resource\n");
}
/* remove the global reference */
if (g_sp_rp == sp_rp) {
DAPLKA_RS_UNREF(g_sp_rp);
}
DAPLKA_RS_UNREF(sp_rp);
return (0);
}
/*
* destroys a service point.
* called when the refcnt drops to zero.
*/
static int
daplka_sp_destroy(daplka_resource_t *gen_rp)
{
daplka_sp_resource_t *sp_rp = (daplka_sp_resource_t *)gen_rp;
ibt_status_t status;
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*sp_rp))
ASSERT(DAPLKA_RS_REFCNT(sp_rp) == 0);
D3("sp_destroy: entering, sp_rp %p, rnum %d\n",
sp_rp, DAPLKA_RS_RNUM(sp_rp));
/*
* it is possible for pending connections to remain
* on an SP. We need to clean them up here.
*/
if (sp_rp->sp_backlog != NULL) {
ibt_cm_proceed_reply_t proc_reply;
int i, cnt = 0;
void *spcp_sidp;
for (i = 0; i < sp_rp->sp_backlog_size; i++) {
if (sp_rp->sp_backlog[i].spcp_state ==
DAPLKA_SPCP_PENDING) {
cnt++;
if (sp_rp->sp_backlog[i].spcp_sid == NULL) {
DERR("sp_destroy: "
"spcp_sid == NULL!\n");
continue;
}
mutex_enter(&sp_rp->sp_lock);
spcp_sidp = sp_rp->sp_backlog[i].spcp_sid;
sp_rp->sp_backlog[i].spcp_state =
DAPLKA_SPCP_INIT;
sp_rp->sp_backlog[i].spcp_sid = NULL;
sp_rp->sp_backlog[i].spcp_req_len = 0;
mutex_exit(&sp_rp->sp_lock);
status = ibt_cm_proceed(IBT_CM_EVENT_REQ_RCV,
spcp_sidp,
IBT_CM_NO_RESOURCE, &proc_reply, NULL, 0);
if (status != IBT_SUCCESS) {
DERR("sp_destroy: proceed failed %d\n",
status);
}
}
}
if (cnt > 0) {
DERR("sp_destroy: found %d pending "
"connections\n", cnt);
}
}
if (sp_rp->sp_srv_hdl != NULL && sp_rp->sp_bind_hdl != NULL) {
status = ibt_unbind_service(sp_rp->sp_srv_hdl,
sp_rp->sp_bind_hdl);
if (status != IBT_SUCCESS) {
DERR("sp_destroy: ibt_unbind_service "
"failed: %d\n", status);
}
}
if (sp_rp->sp_srv_hdl != NULL) {
status = ibt_deregister_service(daplka_dev->daplka_clnt_hdl,
sp_rp->sp_srv_hdl);
if (status != IBT_SUCCESS) {
DERR("sp_destroy: ibt_deregister_service "
"failed: %d\n", status);
}
}
if (sp_rp->sp_backlog != NULL) {
kmem_free(sp_rp->sp_backlog,
sp_rp->sp_backlog_size * sizeof (daplka_sp_conn_pend_t));
sp_rp->sp_backlog = NULL;
sp_rp->sp_backlog_size = 0;
}
/*
* release reference to evd
*/
if (sp_rp->sp_evd_res != NULL) {
DAPLKA_RS_UNREF(sp_rp->sp_evd_res);
}
sp_rp->sp_bind_hdl = NULL;
sp_rp->sp_srv_hdl = NULL;
DAPLKA_RS_FINI(sp_rp);
kmem_free(sp_rp, sizeof (*sp_rp));
D3("sp_destroy: exiting, sp_rp %p\n", sp_rp);
return (0);
}
/*
* this function is called by daplka_hash_destroy for
* freeing SP resource objects
*/
static void
daplka_hash_sp_free(void *obj)
{
daplka_sp_resource_t *sp_rp = (daplka_sp_resource_t *)obj;
daplka_sp_resource_t *g_sp_rp;
int retval;
ASSERT(DAPLKA_RS_TYPE(sp_rp) == DAPL_TYPE_SP);
retval = daplka_hash_remove(&daplka_global_sp_htbl,
sp_rp->sp_global_hkey, (void **)&g_sp_rp);
if (retval != 0 || g_sp_rp == NULL) {
DERR("sp_free: cannot find sp resource\n");
}
if (g_sp_rp == sp_rp) {
DAPLKA_RS_UNREF(g_sp_rp);
}
DAPLKA_RS_UNREF(sp_rp);
}
static void
daplka_hash_sp_unref(void *obj)
{
daplka_sp_resource_t *sp_rp = (daplka_sp_resource_t *)obj;
ASSERT(DAPLKA_RS_TYPE(sp_rp) == DAPL_TYPE_SP);
DAPLKA_RS_UNREF(sp_rp);
}
/*
* Passive side CM handlers
*/
/*
* processes the REQ_RCV event
*/
/* ARGSUSED */
static ibt_cm_status_t
daplka_cm_service_req(daplka_sp_resource_t *spp, ibt_cm_event_t *event,
ibt_cm_return_args_t *ret_args, void *pr_data, ibt_priv_data_len_t pr_len)
{
daplka_sp_conn_pend_t *conn = NULL;
daplka_evd_event_t *cr_ev = NULL;
ibt_cm_status_t cm_status = IBT_CM_DEFAULT;
uint16_t bkl_index;
ibt_status_t status;
/*
* acquire a slot in the connection backlog of this service point
*/
mutex_enter(&spp->sp_lock);
for (bkl_index = 0; bkl_index < spp->sp_backlog_size; bkl_index++) {
if (spp->sp_backlog[bkl_index].spcp_state == DAPLKA_SPCP_INIT) {
conn = &spp->sp_backlog[bkl_index];
ASSERT(conn->spcp_sid == NULL);
conn->spcp_state = DAPLKA_SPCP_PENDING;
conn->spcp_sid = event->cm_session_id;
break;
}
}
mutex_exit(&spp->sp_lock);
/*
* too many pending connections
*/
if (bkl_index == spp->sp_backlog_size) {
DERR("service_req: connection pending exceeded %d limit\n",
spp->sp_backlog_size);
return (IBT_CM_NO_RESOURCE);
}
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*conn))
/*
* save data for cr_handoff
*/
if (pr_data != NULL && pr_len > 0) {
int trunc_len = pr_len;
if (trunc_len > DAPL_MAX_PRIVATE_DATA_SIZE) {
DERR("service_req: private data truncated\n");
trunc_len = DAPL_MAX_PRIVATE_DATA_SIZE;
}
conn->spcp_req_len = trunc_len;
bcopy(pr_data, conn->spcp_req_data, trunc_len);
} else {
conn->spcp_req_len = 0;
}
conn->spcp_rdma_ra_in = event->cm_event.req.req_rdma_ra_in;
conn->spcp_rdma_ra_out = event->cm_event.req.req_rdma_ra_out;
/*
* create a CR event
*/
cr_ev = kmem_zalloc(sizeof (daplka_evd_event_t), KM_NOSLEEP);
if (cr_ev == NULL) {
DERR("service_req: could not alloc cr_ev\n");
cm_status = IBT_CM_NO_RESOURCE;
goto cleanup;
}
cr_ev->ee_next = NULL;
cr_ev->ee_cmev.ec_cm_cookie = spp->sp_cookie;
cr_ev->ee_cmev.ec_cm_is_passive = B_TRUE;
cr_ev->ee_cmev.ec_cm_psep_cookie = DAPLKA_CREATE_PSEP_COOKIE(bkl_index);
/*
* save the requestor gid
* daplka_event_poll needs this if this is a third party REQ_RCV
*/
cr_ev->ee_cmev.ec_cm_req_prim_addr.gid_prefix =
event->cm_event.req.req_prim_addr.av_dgid.gid_prefix;
cr_ev->ee_cmev.ec_cm_req_prim_addr.gid_guid =
event->cm_event.req.req_prim_addr.av_dgid.gid_guid;
/*
* set event type
*/
if (pr_len == 0) {
cr_ev->ee_cmev.ec_cm_ev_type =
DAPL_IB_CME_CONNECTION_REQUEST_PENDING;
} else {
cr_ev->ee_cmev.ec_cm_ev_priv_data =
kmem_zalloc(pr_len, KM_NOSLEEP);
if (cr_ev->ee_cmev.ec_cm_ev_priv_data == NULL) {
DERR("service_req: could not alloc priv\n");
cm_status = IBT_CM_NO_RESOURCE;
goto cleanup;
}
bcopy(pr_data, cr_ev->ee_cmev.ec_cm_ev_priv_data, pr_len);
cr_ev->ee_cmev.ec_cm_ev_type =
DAPL_IB_CME_CONNECTION_REQUEST_PENDING_PRIVATE_DATA;
}
cr_ev->ee_cmev.ec_cm_ev_priv_data_len = pr_len;
/*
* tell the active side to expect the processing time to be
* at most equal to daplka_cm_delay
*/
status = ibt_cm_delay(IBT_CM_DELAY_REQ, event->cm_session_id,
daplka_cm_delay, NULL, 0);
if (status != IBT_SUCCESS) {
DERR("service_req: ibt_cm_delay failed %d\n", status);
cm_status = IBT_CM_NO_RESOURCE;
goto cleanup;
}
/*
* enqueue cr_ev onto the cr_events list of the EVD
* corresponding to the SP
*/
D2("service_req: enqueue event(%p) evdp(%p) priv_data(%p) "
"priv_len(%d) psep(0x%llx)\n", cr_ev, spp->sp_evd_res,
cr_ev->ee_cmev.ec_cm_ev_priv_data,
(int)cr_ev->ee_cmev.ec_cm_ev_priv_data_len,
(longlong_t)cr_ev->ee_cmev.ec_cm_psep_cookie);
daplka_evd_wakeup(spp->sp_evd_res,
&spp->sp_evd_res->evd_cr_events, cr_ev);
_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*conn))
return (IBT_CM_DEFER);
cleanup:;
/*
* free the cr event
*/
if (cr_ev != NULL) {
if (cr_ev->ee_cmev.ec_cm_ev_priv_data != NULL) {
kmem_free(cr_ev->ee_cmev.ec_cm_ev_priv_data, pr_len);
cr_ev->ee_cmev.ec_cm_ev_priv_data = NULL;
cr_ev->ee_cmev.ec_cm_ev_priv_data_len = 0;
}
kmem_free(cr_ev, sizeof (daplka_evd_event_t));
}
/*
* release our slot in the backlog array
*/
if (conn != NULL) {
mutex_enter(&spp->sp_lock);
ASSERT(conn->spcp_state == DAPLKA_SPCP_PENDING);
ASSERT(conn->spcp_sid == event->cm_session_id);
conn->spcp_state = DAPLKA_SPCP_INIT;
conn->spcp_req_len = 0;
conn->spcp_sid = NULL;
mutex_exit(&spp->sp_lock);
}
return (cm_status);
}
/*
* processes the CONN_CLOSED event
*/
/* ARGSUSED */
static ibt_cm_status_t
daplka_cm_service_conn_closed(daplka_sp_resource_t *sp_rp,
ibt_cm_event_t *event, ibt_cm_return_args_t *ret_args,
void *priv_data, ibt_priv_data_len_t len)
{
daplka_ep_resource_t *ep_rp;
daplka_evd_event_t *disc_ev;
uint32_t old_state, new_state;
ep_rp = (daplka_ep_resource_t *)
ibt_get_chan_private(event->cm_channel);
if (ep_rp == NULL) {
DERR("service_conn_closed: ep_rp == NULL\n");
return (IBT_CM_ACCEPT);
}
/*
* verify that the ep_state is either CONNECTED or
* DISCONNECTING. if it is not in either states return
* without generating an event.
*/
new_state = old_state = daplka_ep_get_state(ep_rp);
if (old_state != DAPLKA_EP_STATE_CONNECTED &&
old_state != DAPLKA_EP_STATE_DISCONNECTING) {
/*
* we can get here if the connection is being aborted
*/
D2("service_conn_closed: conn aborted, state = %d, "
"closed = %d\n", old_state, (int)event->cm_event.closed);
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
/*
* create a DAPL_IB_CME_DISCONNECTED event
*/
disc_ev = kmem_zalloc(sizeof (daplka_evd_event_t), KM_NOSLEEP);
if (disc_ev == NULL) {
DERR("service_conn_closed: cannot alloc disc_ev\n");
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
disc_ev->ee_cmev.ec_cm_ev_type = DAPL_IB_CME_DISCONNECTED;
disc_ev->ee_cmev.ec_cm_cookie = sp_rp->sp_cookie;
disc_ev->ee_cmev.ec_cm_is_passive = B_TRUE;
disc_ev->ee_cmev.ec_cm_psep_cookie = ep_rp->ep_psep_cookie;
disc_ev->ee_cmev.ec_cm_ev_priv_data = NULL;
disc_ev->ee_cmev.ec_cm_ev_priv_data_len = 0;
D2("service_conn_closed: enqueue event(%p) evdp(%p) psep(0x%llx)\n",
disc_ev, sp_rp->sp_evd_res, (longlong_t)ep_rp->ep_psep_cookie);
/*
* transition ep_state to DISCONNECTED
*/
new_state = DAPLKA_EP_STATE_DISCONNECTED;
daplka_ep_set_state(ep_rp, old_state, new_state);
/*
* enqueue event onto the conn_evd owned by ep_rp
*/
daplka_evd_wakeup(ep_rp->ep_conn_evd,
&ep_rp->ep_conn_evd->evd_conn_events, disc_ev);
return (IBT_CM_ACCEPT);
}
/*
* processes the CONN_EST event
*/
/* ARGSUSED */
static ibt_cm_status_t
daplka_cm_service_conn_est(daplka_sp_resource_t *sp_rp, ibt_cm_event_t *event,
ibt_cm_return_args_t *ret_args, void *priv_data, ibt_priv_data_len_t len)
{
daplka_ep_resource_t *ep_rp;
daplka_evd_event_t *conn_ev;
void *pr_data = event->cm_priv_data;
ibt_priv_data_len_t pr_len = event->cm_priv_data_len;
uint32_t old_state, new_state;
ep_rp = (daplka_ep_resource_t *)
ibt_get_chan_private(event->cm_channel);
if (ep_rp == NULL) {
DERR("service_conn_est: ep_rp == NULL\n");
return (IBT_CM_ACCEPT);
}
/*
* verify that ep_state is ACCEPTING. if it is not in this
* state, return without generating an event.
*/
new_state = old_state = daplka_ep_get_state(ep_rp);
if (old_state != DAPLKA_EP_STATE_ACCEPTING) {
/*
* we can get here if the connection is being aborted
*/
DERR("service_conn_est: conn aborted, state = %d\n",
old_state);
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
/*
* create a DAPL_IB_CME_CONNECTED event
*/
conn_ev = kmem_zalloc(sizeof (daplka_evd_event_t), KM_NOSLEEP);
if (conn_ev == NULL) {
DERR("service_conn_est: conn_ev alloc failed\n");
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
conn_ev->ee_cmev.ec_cm_ev_type = DAPL_IB_CME_CONNECTED;
conn_ev->ee_cmev.ec_cm_cookie = sp_rp->sp_cookie;
conn_ev->ee_cmev.ec_cm_is_passive = B_TRUE;
conn_ev->ee_cmev.ec_cm_psep_cookie = ep_rp->ep_psep_cookie;
/*
* copy private data into event
*/
if (pr_len > 0) {
conn_ev->ee_cmev.ec_cm_ev_priv_data =
kmem_zalloc(pr_len, KM_NOSLEEP);
if (conn_ev->ee_cmev.ec_cm_ev_priv_data == NULL) {
DERR("service_conn_est: pr_data alloc failed\n");
daplka_ep_set_state(ep_rp, old_state, new_state);
kmem_free(conn_ev, sizeof (daplka_evd_event_t));
return (IBT_CM_ACCEPT);
}
bcopy(pr_data, conn_ev->ee_cmev.ec_cm_ev_priv_data, pr_len);
}
conn_ev->ee_cmev.ec_cm_ev_priv_data_len = pr_len;
D2("service_conn_est: enqueue event(%p) evdp(%p)\n",
conn_ev, ep_rp->ep_conn_evd);
/*
* transition ep_state to CONNECTED
*/
new_state = DAPLKA_EP_STATE_CONNECTED;
daplka_ep_set_state(ep_rp, old_state, new_state);
/*
* enqueue event onto the conn_evd owned by ep_rp
*/
daplka_evd_wakeup(ep_rp->ep_conn_evd,
&ep_rp->ep_conn_evd->evd_conn_events, conn_ev);
return (IBT_CM_ACCEPT);
}
/*
* processes the FAILURE event
*/
/* ARGSUSED */
static ibt_cm_status_t
daplka_cm_service_event_failure(daplka_sp_resource_t *sp_rp,
ibt_cm_event_t *event, ibt_cm_return_args_t *ret_args, void *priv_data,
ibt_priv_data_len_t len)
{
daplka_evd_event_t *disc_ev;
daplka_ep_resource_t *ep_rp;
uint32_t old_state, new_state;
ibt_rc_chan_query_attr_t chan_attrs;
ibt_status_t status;
/*
* check that we still have a valid cm_channel before continuing
*/
if (event->cm_channel == NULL) {
DERR("serice_event_failure: event->cm_channel == NULL\n");
return (IBT_CM_ACCEPT);
}
ep_rp = (daplka_ep_resource_t *)
ibt_get_chan_private(event->cm_channel);
if (ep_rp == NULL) {
DERR("service_event_failure: ep_rp == NULL\n");
return (IBT_CM_ACCEPT);
}
/*
* verify that ep_state is ACCEPTING or DISCONNECTING. if it
* is not in either state, return without generating an event.
*/
new_state = old_state = daplka_ep_get_state(ep_rp);
if (old_state != DAPLKA_EP_STATE_ACCEPTING &&
old_state != DAPLKA_EP_STATE_DISCONNECTING) {
/*
* we can get here if the connection is being aborted
*/
DERR("service_event_failure: conn aborted, state = %d, "
"cf_code = %d, cf_msg = %d, cf_reason = %d\n", old_state,
(int)event->cm_event.failed.cf_code,
(int)event->cm_event.failed.cf_msg,
(int)event->cm_event.failed.cf_reason);
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
bzero(&chan_attrs, sizeof (ibt_rc_chan_query_attr_t));
status = ibt_query_rc_channel(ep_rp->ep_chan_hdl, &chan_attrs);
if ((status == IBT_SUCCESS) &&
(chan_attrs.rc_state != IBT_STATE_ERROR)) {
DERR("service_event_failure: conn abort qpn %d state %d\n",
chan_attrs.rc_qpn, chan_attrs.rc_state);
/* explicit transition the QP to ERROR state */
status = ibt_flush_channel(ep_rp->ep_chan_hdl);
}
/*
* create an event
*/
disc_ev = kmem_zalloc(sizeof (daplka_evd_event_t), KM_NOSLEEP);
if (disc_ev == NULL) {
DERR("service_event_failure: cannot alloc disc_ev\n");
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
/*
* fill in the appropriate event type
*/
if (event->cm_event.failed.cf_code == IBT_CM_FAILURE_TIMEOUT) {
disc_ev->ee_cmev.ec_cm_ev_type = DAPL_IB_CME_TIMED_OUT;
} else if (event->cm_event.failed.cf_code == IBT_CM_FAILURE_REJ_RCV) {
switch (event->cm_event.failed.cf_reason) {
case IBT_CM_INVALID_CID:
disc_ev->ee_cmev.ec_cm_ev_type =
DAPL_IB_CME_DESTINATION_REJECT;
break;
default:
disc_ev->ee_cmev.ec_cm_ev_type =
DAPL_IB_CME_LOCAL_FAILURE;
break;
}
} else {
disc_ev->ee_cmev.ec_cm_ev_type = DAPL_IB_CME_LOCAL_FAILURE;
}
disc_ev->ee_cmev.ec_cm_cookie = sp_rp->sp_cookie;
disc_ev->ee_cmev.ec_cm_is_passive = B_TRUE;
disc_ev->ee_cmev.ec_cm_psep_cookie = ep_rp->ep_psep_cookie;
disc_ev->ee_cmev.ec_cm_ev_priv_data_len = 0;
disc_ev->ee_cmev.ec_cm_ev_priv_data = NULL;
D2("service_event_failure: enqueue event(%p) evdp(%p) cf_code(%d) "
"cf_msg(%d) cf_reason(%d) psep(0x%llx)\n", disc_ev,
ep_rp->ep_conn_evd, (int)event->cm_event.failed.cf_code,
(int)event->cm_event.failed.cf_msg,
(int)event->cm_event.failed.cf_reason,
(longlong_t)ep_rp->ep_psep_cookie);
/*
* transition ep_state to DISCONNECTED
*/
new_state = DAPLKA_EP_STATE_DISCONNECTED;
daplka_ep_set_state(ep_rp, old_state, new_state);
/*
* enqueue event onto the conn_evd owned by ep_rp
*/
daplka_evd_wakeup(ep_rp->ep_conn_evd,
&ep_rp->ep_conn_evd->evd_conn_events, disc_ev);
return (IBT_CM_ACCEPT);
}
/*
* this is the passive side CM handler. it gets registered
* when an SP resource is created in daplka_service_register.
*/
static ibt_cm_status_t
daplka_cm_service_handler(void *cm_private, ibt_cm_event_t *event,
ibt_cm_return_args_t *ret_args, void *priv_data, ibt_priv_data_len_t len)
{
daplka_sp_resource_t *sp_rp = (daplka_sp_resource_t *)cm_private;
if (sp_rp == NULL) {
DERR("service_handler: sp_rp == NULL\n");
return (IBT_CM_NO_RESOURCE);
}
/*
* default is not to return priv data
*/
if (ret_args != NULL) {
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*ret_args))
ret_args->cm_ret_len = 0;
}
switch (event->cm_type) {
case IBT_CM_EVENT_REQ_RCV:
D2("service_handler: IBT_CM_EVENT_REQ_RCV\n");
return (daplka_cm_service_req(sp_rp, event, ret_args,
event->cm_priv_data, event->cm_priv_data_len));
case IBT_CM_EVENT_REP_RCV:
/* passive side should not receive this event */
D2("service_handler: IBT_CM_EVENT_REP_RCV\n");
return (IBT_CM_DEFAULT);
case IBT_CM_EVENT_CONN_CLOSED:
D2("service_handler: IBT_CM_EVENT_CONN_CLOSED %d\n",
event->cm_event.closed);
return (daplka_cm_service_conn_closed(sp_rp, event, ret_args,
priv_data, len));
case IBT_CM_EVENT_MRA_RCV:
/* passive side does default processing MRA event */
D2("service_handler: IBT_CM_EVENT_MRA_RCV\n");
return (IBT_CM_DEFAULT);
case IBT_CM_EVENT_CONN_EST:
D2("service_handler: IBT_CM_EVENT_CONN_EST\n");
return (daplka_cm_service_conn_est(sp_rp, event, ret_args,
priv_data, len));
case IBT_CM_EVENT_FAILURE:
D2("service_handler: IBT_CM_EVENT_FAILURE\n");
return (daplka_cm_service_event_failure(sp_rp, event, ret_args,
priv_data, len));
case IBT_CM_EVENT_LAP_RCV:
/* active side had initiated a path migration operation */
D2("service_handler: IBT_CM_EVENT_LAP_RCV\n");
return (IBT_CM_ACCEPT);
default:
DERR("service_handler: invalid event %d\n", event->cm_type);
break;
}
return (IBT_CM_DEFAULT);
}
/*
* Active side CM handlers
*/
/*
* Processes the REP_RCV event. When the passive side accepts the
* connection, this handler is called. We make a copy of the private
* data into the ep so that it can be passed back to userland in when
* the CONN_EST event occurs.
*/
/* ARGSUSED */
static ibt_cm_status_t
daplka_cm_rc_rep_rcv(daplka_ep_resource_t *ep_rp, ibt_cm_event_t *event,
ibt_cm_return_args_t *ret_args, void *priv_data, ibt_priv_data_len_t len)
{
void *pr_data = event->cm_priv_data;
ibt_priv_data_len_t pr_len = event->cm_priv_data_len;
uint32_t old_state, new_state;
D2("rc_rep_rcv: pr_data(0x%p), pr_len(%d)\n", pr_data,
(int)pr_len);
ASSERT(ep_rp != NULL);
new_state = old_state = daplka_ep_get_state(ep_rp);
if (old_state != DAPLKA_EP_STATE_CONNECTING) {
/*
* we can get here if the connection is being aborted
*/
DERR("rc_rep_rcv: conn aborted, state = %d\n", old_state);
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_NO_CHANNEL);
}
/*
* we do not cancel the timer here because the connection
* handshake is still in progress.
*/
/*
* save the private data. it will be passed up when
* the connection is established.
*/
if (pr_len > 0) {
ep_rp->ep_priv_len = pr_len;
bcopy(pr_data, ep_rp->ep_priv_data, (size_t)pr_len);
}
/*
* we do not actually transition to a different state.
* the state will change when we get a conn_est, failure,
* closed, or timeout event.
*/
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
/*
* Processes the CONN_CLOSED event. This gets called when either
* the active or passive side closes the rc channel.
*/
/* ARGSUSED */
static ibt_cm_status_t
daplka_cm_rc_conn_closed(daplka_ep_resource_t *ep_rp, ibt_cm_event_t *event,
ibt_cm_return_args_t *ret_args, void *priv_data, ibt_priv_data_len_t len)
{
daplka_evd_event_t *disc_ev;
uint32_t old_state, new_state;
ASSERT(ep_rp != NULL);
old_state = new_state = daplka_ep_get_state(ep_rp);
if (old_state != DAPLKA_EP_STATE_CONNECTED &&
old_state != DAPLKA_EP_STATE_DISCONNECTING) {
/*
* we can get here if the connection is being aborted
*/
D2("rc_conn_closed: conn aborted, state = %d, "
"closed = %d\n", old_state, (int)event->cm_event.closed);
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
/*
* it's ok for the timer to fire at this point. the
* taskq thread that processes the timer will just wait
* until we are done with our state transition.
*/
if (daplka_cancel_timer(ep_rp) != 0) {
/*
* daplka_cancel_timer returns -1 if the timer is
* being processed and 0 for all other cases.
* we need to reset ep_state to allow timer processing
* to continue.
*/
DERR("rc_conn_closed: timer is being processed\n");
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
/*
* create a DAPL_IB_CME_DISCONNECTED event
*/
disc_ev = kmem_zalloc(sizeof (daplka_evd_event_t), KM_NOSLEEP);
if (disc_ev == NULL) {
DERR("rc_conn_closed: could not alloc ev\n");
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
disc_ev->ee_cmev.ec_cm_ev_type = DAPL_IB_CME_DISCONNECTED;
disc_ev->ee_cmev.ec_cm_cookie = ep_rp->ep_cookie;
disc_ev->ee_cmev.ec_cm_is_passive = B_FALSE;
disc_ev->ee_cmev.ec_cm_psep_cookie = 0;
disc_ev->ee_cmev.ec_cm_ev_priv_data = NULL;
disc_ev->ee_cmev.ec_cm_ev_priv_data_len = 0;
D2("rc_conn_closed: enqueue event(%p) evdp(%p) closed(%d)\n",
disc_ev, ep_rp->ep_conn_evd, (int)event->cm_event.closed);
/*
* transition ep_state to DISCONNECTED
*/
new_state = DAPLKA_EP_STATE_DISCONNECTED;
daplka_ep_set_state(ep_rp, old_state, new_state);
/*
* enqueue event onto the conn_evd owned by ep_rp
*/
daplka_evd_wakeup(ep_rp->ep_conn_evd,
&ep_rp->ep_conn_evd->evd_conn_events, disc_ev);
return (IBT_CM_ACCEPT);
}
/*
* processes the CONN_EST event
*/
/* ARGSUSED */
static ibt_cm_status_t
daplka_cm_rc_conn_est(daplka_ep_resource_t *ep_rp, ibt_cm_event_t *event,
ibt_cm_return_args_t *ret_args, void *priv_data, ibt_priv_data_len_t len)
{
daplka_evd_event_t *conn_ev;
uint32_t old_state, new_state;
ASSERT(ep_rp != NULL);
old_state = new_state = daplka_ep_get_state(ep_rp);
if (old_state != DAPLKA_EP_STATE_CONNECTING) {
/*
* we can get here if the connection is being aborted
*/
DERR("rc_conn_est: conn aborted, state = %d\n", old_state);
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
/*
* it's ok for the timer to fire at this point. the
* taskq thread that processes the timer will just wait
* until we are done with our state transition.
*/
if (daplka_cancel_timer(ep_rp) != 0) {
/*
* daplka_cancel_timer returns -1 if the timer is
* being processed and 0 for all other cases.
* we need to reset ep_state to allow timer processing
* to continue.
*/
DERR("rc_conn_est: timer is being processed\n");
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
/*
* create a DAPL_IB_CME_CONNECTED event
*/
conn_ev = kmem_zalloc(sizeof (daplka_evd_event_t), KM_NOSLEEP);
if (conn_ev == NULL) {
DERR("rc_conn_est: could not alloc ev\n");
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
conn_ev->ee_cmev.ec_cm_ev_type = DAPL_IB_CME_CONNECTED;
conn_ev->ee_cmev.ec_cm_cookie = ep_rp->ep_cookie;
conn_ev->ee_cmev.ec_cm_is_passive = B_FALSE;
conn_ev->ee_cmev.ec_cm_psep_cookie = 0;
/*
* The private data passed back in the connection established
* event is what was recvd in the daplka_cm_rc_rep_rcv handler and
* saved in ep resource structure.
*/
if (ep_rp->ep_priv_len > 0) {
conn_ev->ee_cmev.ec_cm_ev_priv_data =
kmem_zalloc(ep_rp->ep_priv_len, KM_NOSLEEP);
if (conn_ev->ee_cmev.ec_cm_ev_priv_data == NULL) {
DERR("rc_conn_est: could not alloc pr_data\n");
kmem_free(conn_ev, sizeof (daplka_evd_event_t));
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
bcopy(ep_rp->ep_priv_data, conn_ev->ee_cmev.ec_cm_ev_priv_data,
ep_rp->ep_priv_len);
}
conn_ev->ee_cmev.ec_cm_ev_priv_data_len = ep_rp->ep_priv_len;
D2("rc_conn_est: enqueue event(%p) evdp(%p) pr_data(0x%p), "
"pr_len(%d)\n", conn_ev, ep_rp->ep_conn_evd,
conn_ev->ee_cmev.ec_cm_ev_priv_data,
(int)conn_ev->ee_cmev.ec_cm_ev_priv_data_len);
/*
* transition ep_state to CONNECTED
*/
new_state = DAPLKA_EP_STATE_CONNECTED;
daplka_ep_set_state(ep_rp, old_state, new_state);
/*
* enqueue event onto the conn_evd owned by ep_rp
*/
daplka_evd_wakeup(ep_rp->ep_conn_evd,
&ep_rp->ep_conn_evd->evd_conn_events, conn_ev);
return (IBT_CM_ACCEPT);
}
/*
* processes the FAILURE event
*/
/* ARGSUSED */
static ibt_cm_status_t
daplka_cm_rc_event_failure(daplka_ep_resource_t *ep_rp, ibt_cm_event_t *event,
ibt_cm_return_args_t *ret_args, void *priv_data, ibt_priv_data_len_t len)
{
daplka_evd_event_t *disc_ev;
ibt_priv_data_len_t pr_len = event->cm_priv_data_len;
void *pr_data = event->cm_priv_data;
uint32_t old_state, new_state;
ibt_rc_chan_query_attr_t chan_attrs;
ibt_status_t status;
ASSERT(ep_rp != NULL);
old_state = new_state = daplka_ep_get_state(ep_rp);
if (old_state != DAPLKA_EP_STATE_CONNECTING &&
old_state != DAPLKA_EP_STATE_DISCONNECTING) {
/*
* we can get here if the connection is being aborted
*/
DERR("rc_event_failure: conn aborted, state = %d, "
"cf_code = %d, cf_msg = %d, cf_reason = %d\n", old_state,
(int)event->cm_event.failed.cf_code,
(int)event->cm_event.failed.cf_msg,
(int)event->cm_event.failed.cf_reason);
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
/*
* it's ok for the timer to fire at this point. the
* taskq thread that processes the timer will just wait
* until we are done with our state transition.
*/
if (daplka_cancel_timer(ep_rp) != 0) {
/*
* daplka_cancel_timer returns -1 if the timer is
* being processed and 0 for all other cases.
* we need to reset ep_state to allow timer processing
* to continue.
*/
DERR("rc_event_failure: timer is being processed\n");
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
bzero(&chan_attrs, sizeof (ibt_rc_chan_query_attr_t));
status = ibt_query_rc_channel(ep_rp->ep_chan_hdl, &chan_attrs);
if ((status == IBT_SUCCESS) &&
(chan_attrs.rc_state != IBT_STATE_ERROR)) {
DERR("rc_event_failure: conn abort qpn %d state %d\n",
chan_attrs.rc_qpn, chan_attrs.rc_state);
/* explicit transition the QP to ERROR state */
status = ibt_flush_channel(ep_rp->ep_chan_hdl);
}
/*
* create an event
*/
disc_ev = kmem_zalloc(sizeof (daplka_evd_event_t), KM_NOSLEEP);
if (disc_ev == NULL) {
DERR("rc_event_failure: cannot alloc disc_ev\n");
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
/*
* copy private data into event
*/
if (pr_len > 0) {
disc_ev->ee_cmev.ec_cm_ev_priv_data =
kmem_zalloc(pr_len, KM_NOSLEEP);
if (disc_ev->ee_cmev.ec_cm_ev_priv_data == NULL) {
DERR("rc_event_failure: cannot alloc pr data\n");
kmem_free(disc_ev, sizeof (daplka_evd_event_t));
daplka_ep_set_state(ep_rp, old_state, new_state);
return (IBT_CM_ACCEPT);
}
bcopy(pr_data, disc_ev->ee_cmev.ec_cm_ev_priv_data, pr_len);
}
disc_ev->ee_cmev.ec_cm_ev_priv_data_len = pr_len;
/*
* fill in the appropriate event type
*/
if (event->cm_event.failed.cf_code == IBT_CM_FAILURE_REJ_RCV) {
switch (event->cm_event.failed.cf_reason) {
case IBT_CM_CONSUMER:
disc_ev->ee_cmev.ec_cm_ev_type =
DAPL_IB_CME_DESTINATION_REJECT_PRIVATE_DATA;
break;
case IBT_CM_NO_CHAN:
case IBT_CM_NO_RESC:
disc_ev->ee_cmev.ec_cm_ev_type =
DAPL_IB_CME_DESTINATION_REJECT;
break;
default:
disc_ev->ee_cmev.ec_cm_ev_type =
DAPL_IB_CME_DESTINATION_REJECT;
break;
}
} else if (event->cm_event.failed.cf_code == IBT_CM_FAILURE_TIMEOUT) {
disc_ev->ee_cmev.ec_cm_ev_type = DAPL_IB_CME_TIMED_OUT;
} else {
/* others we'll mark as local failure */
disc_ev->ee_cmev.ec_cm_ev_type = DAPL_IB_CME_LOCAL_FAILURE;
}
disc_ev->ee_cmev.ec_cm_cookie = ep_rp->ep_cookie;
disc_ev->ee_cmev.ec_cm_is_passive = B_FALSE;
disc_ev->ee_cmev.ec_cm_psep_cookie = 0;
D2("rc_event_failure: enqueue event(%p) evdp(%p) cf_code(%d) "
"cf_msg(%d) cf_reason(%d)\n", disc_ev, ep_rp->ep_conn_evd,
(int)event->cm_event.failed.cf_code,
(int)event->cm_event.failed.cf_msg,
(int)event->cm_event.failed.cf_reason);
/*
* transition ep_state to DISCONNECTED
*/
new_state = DAPLKA_EP_STATE_DISCONNECTED;
daplka_ep_set_state(ep_rp, old_state, new_state);
/*
* enqueue event onto the conn_evd owned by ep_rp
*/
daplka_evd_wakeup(ep_rp->ep_conn_evd,
&ep_rp->ep_conn_evd->evd_conn_events, disc_ev);
return (IBT_CM_ACCEPT);
}
/*
* This is the active side CM handler. It gets registered when
* ibt_open_rc_channel is called.
*/
static ibt_cm_status_t
daplka_cm_rc_handler(void *cm_private, ibt_cm_event_t *event,
ibt_cm_return_args_t *ret_args, void *priv_data, ibt_priv_data_len_t len)
{
daplka_ep_resource_t *ep_rp = (daplka_ep_resource_t *)cm_private;
if (ep_rp == NULL) {
DERR("rc_handler: ep_rp == NULL\n");
return (IBT_CM_NO_CHANNEL);
}
/*
* default is not to return priv data
*/
if (ret_args != NULL) {
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*ret_args))
ret_args->cm_ret_len = 0;
}
switch (event->cm_type) {
case IBT_CM_EVENT_REQ_RCV:
/* active side should not receive this event */
D2("rc_handler: IBT_CM_EVENT_REQ_RCV\n");
break;
case IBT_CM_EVENT_REP_RCV:
/* connection accepted by passive side */
D2("rc_handler: IBT_CM_EVENT_REP_RCV\n");
return (daplka_cm_rc_rep_rcv(ep_rp, event, ret_args,
priv_data, len));
case IBT_CM_EVENT_CONN_CLOSED:
D2("rc_handler: IBT_CM_EVENT_CONN_CLOSED %d\n",
event->cm_event.closed);
return (daplka_cm_rc_conn_closed(ep_rp, event, ret_args,
priv_data, len));
case IBT_CM_EVENT_MRA_RCV:
/* passive side does default processing MRA event */
D2("rc_handler: IBT_CM_EVENT_MRA_RCV\n");
return (IBT_CM_DEFAULT);
case IBT_CM_EVENT_CONN_EST:
D2("rc_handler: IBT_CM_EVENT_CONN_EST\n");
return (daplka_cm_rc_conn_est(ep_rp, event, ret_args,
priv_data, len));
case IBT_CM_EVENT_FAILURE:
D2("rc_handler: IBT_CM_EVENT_FAILURE\n");
return (daplka_cm_rc_event_failure(ep_rp, event, ret_args,
priv_data, len));
default:
D2("rc_handler: invalid event %d\n", event->cm_type);
break;
}
return (IBT_CM_DEFAULT);
}
/*
* creates an IA resource and inserts it into the global resource table.
*/
/* ARGSUSED */
static int
daplka_ia_create(minor_t rnum, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
daplka_ia_resource_t *ia_rp, *tmp_rp;
boolean_t inserted = B_FALSE;
dapl_ia_create_t args;
ibt_hca_hdl_t hca_hdl;
ibt_status_t status;
ib_gid_t sgid;
int retval;
ibt_hca_portinfo_t *pinfop;
uint_t pinfon;
uint_t size;
ibt_ar_t ar_s;
daplka_hca_t *hca;
retval = ddi_copyin((void *)arg, &args, sizeof (dapl_ia_create_t),
mode);
if (retval != 0) {
DERR("ia_create: copyin error %d\n", retval);
return (EFAULT);
}
if (args.ia_version != DAPL_IF_VERSION) {
DERR("ia_create: invalid version %d, expected version %d\n",
args.ia_version, DAPL_IF_VERSION);
return (EINVAL);
}
/*
* find the hca with the matching guid
*/
mutex_enter(&daplka_dev->daplka_mutex);
for (hca = daplka_dev->daplka_hca_list_head; hca != NULL;
hca = hca->hca_next) {
if (hca->hca_guid == args.ia_guid) {
DAPLKA_HOLD_HCA_WITHOUT_LOCK(hca);
break;
}
}
mutex_exit(&daplka_dev->daplka_mutex);
if (hca == NULL) {
DERR("ia_create: guid 0x%016llx not found\n",
(longlong_t)args.ia_guid);
return (EINVAL);
}
/*
* check whether port number is valid and whether it is up
*/
if (args.ia_port > hca->hca_nports) {
DERR("ia_create: invalid hca_port %d\n", args.ia_port);
DAPLKA_RELE_HCA(daplka_dev, hca);
return (EINVAL);
}
hca_hdl = hca->hca_hdl;
if (hca_hdl == NULL) {
DERR("ia_create: hca_hdl == NULL\n");
DAPLKA_RELE_HCA(daplka_dev, hca);
return (EINVAL);
}
status = ibt_query_hca_ports(hca_hdl, (uint8_t)args.ia_port,
&pinfop, &pinfon, &size);
if (status != IBT_SUCCESS) {
DERR("ia_create: ibt_query_hca_ports returned %d\n", status);
*rvalp = (int)status;
DAPLKA_RELE_HCA(daplka_dev, hca);
return (0);
}
sgid = pinfop->p_sgid_tbl[0];
ibt_free_portinfo(pinfop, size);
ia_rp = kmem_zalloc(sizeof (daplka_ia_resource_t), daplka_km_flags);
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*ia_rp))
DAPLKA_RS_INIT(ia_rp, DAPL_TYPE_IA, rnum, daplka_ia_destroy);
mutex_init(&ia_rp->ia_lock, NULL, MUTEX_DRIVER, NULL);
cv_init(&ia_rp->ia_cv, NULL, CV_DRIVER, NULL);
ia_rp->ia_hca_hdl = hca_hdl;
ia_rp->ia_hca_sgid = sgid;
ia_rp->ia_hca = hca;
ia_rp->ia_port_num = args.ia_port;
ia_rp->ia_port_pkey = args.ia_pkey;
ia_rp->ia_pid = ddi_get_pid();
ia_rp->ia_async_evd_hkeys = NULL;
ia_rp->ia_ar_registered = B_FALSE;
bcopy(args.ia_sadata, ia_rp->ia_sadata, DAPL_ATS_NBYTES);
/* register Address Record */
ar_s.ar_gid = ia_rp->ia_hca_sgid;
ar_s.ar_pkey = ia_rp->ia_port_pkey;
bcopy(ia_rp->ia_sadata, ar_s.ar_data, DAPL_ATS_NBYTES);
#define UC(b) ar_s.ar_data[(b)]
D3("daplka_ia_create: SA[8] %d.%d.%d.%d\n",
UC(8), UC(9), UC(10), UC(11));
D3("daplka_ia_create: SA[12] %d.%d.%d.%d\n",
UC(12), UC(13), UC(14), UC(15));
retval = ibt_register_ar(daplka_dev->daplka_clnt_hdl, &ar_s);
if (retval != IBT_SUCCESS) {
DERR("ia_create: failed to register Address Record.\n");
retval = EINVAL;
goto cleanup;
}
ia_rp->ia_ar_registered = B_TRUE;
/*
* create hash tables for all object types
*/
retval = daplka_hash_create(&ia_rp->ia_ep_htbl, DAPLKA_EP_HTBL_SZ,
daplka_hash_ep_free, daplka_hash_generic_lookup);
if (retval != 0) {
DERR("ia_create: cannot create ep hash table\n");
goto cleanup;
}
retval = daplka_hash_create(&ia_rp->ia_mr_htbl, DAPLKA_MR_HTBL_SZ,
daplka_hash_mr_free, daplka_hash_generic_lookup);
if (retval != 0) {
DERR("ia_create: cannot create mr hash table\n");
goto cleanup;
}
retval = daplka_hash_create(&ia_rp->ia_mw_htbl, DAPLKA_MW_HTBL_SZ,
daplka_hash_mw_free, daplka_hash_generic_lookup);
if (retval != 0) {
DERR("ia_create: cannot create mw hash table\n");
goto cleanup;
}
retval = daplka_hash_create(&ia_rp->ia_pd_htbl, DAPLKA_PD_HTBL_SZ,
daplka_hash_pd_free, daplka_hash_generic_lookup);
if (retval != 0) {
DERR("ia_create: cannot create pd hash table\n");
goto cleanup;
}
retval = daplka_hash_create(&ia_rp->ia_evd_htbl, DAPLKA_EVD_HTBL_SZ,
daplka_hash_evd_free, daplka_hash_generic_lookup);
if (retval != 0) {
DERR("ia_create: cannot create evd hash table\n");
goto cleanup;
}
retval = daplka_hash_create(&ia_rp->ia_cno_htbl, DAPLKA_CNO_HTBL_SZ,
daplka_hash_cno_free, daplka_hash_generic_lookup);
if (retval != 0) {
DERR("ia_create: cannot create cno hash table\n");
goto cleanup;
}
retval = daplka_hash_create(&ia_rp->ia_sp_htbl, DAPLKA_SP_HTBL_SZ,
daplka_hash_sp_free, daplka_hash_generic_lookup);
if (retval != 0) {
DERR("ia_create: cannot create sp hash table\n");
goto cleanup;
}
retval = daplka_hash_create(&ia_rp->ia_srq_htbl, DAPLKA_SRQ_HTBL_SZ,
daplka_hash_srq_free, daplka_hash_generic_lookup);
if (retval != 0) {
DERR("ia_create: cannot create srq hash table\n");
goto cleanup;
}
/*
* insert ia_rp into the global resource table
*/
retval = daplka_resource_insert(rnum, (daplka_resource_t *)ia_rp);
if (retval != 0) {
DERR("ia_create: cannot insert resource\n");
goto cleanup;
}
inserted = B_TRUE;
_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*ia_rp))
args.ia_resnum = rnum;
retval = copyout(&args, (void *)arg, sizeof (dapl_ia_create_t));
if (retval != 0) {
DERR("ia_create: copyout error %d\n", retval);
retval = EFAULT;
goto cleanup;
}
return (0);
cleanup:;
if (inserted) {
tmp_rp = (daplka_ia_resource_t *)daplka_resource_remove(rnum);
if (tmp_rp != ia_rp) {
/*
* we can return here because another thread must
* have freed up the resource
*/
DERR("ia_create: cannot remove resource\n");
return (retval);
}
}
DAPLKA_RS_UNREF(ia_rp);
return (retval);
}
/*
* destroys an IA resource
*/
static int
daplka_ia_destroy(daplka_resource_t *gen_rp)
{
daplka_ia_resource_t *ia_rp = (daplka_ia_resource_t *)gen_rp;
daplka_async_evd_hkey_t *hkp;
int cnt;
ibt_ar_t ar_s;
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*ia_rp))
D3("ia_destroy: entering, ia_rp 0x%p\n", ia_rp);
/* deregister Address Record */
if (ia_rp->ia_ar_registered) {
ar_s.ar_gid = ia_rp->ia_hca_sgid;
ar_s.ar_pkey = ia_rp->ia_port_pkey;
bcopy(ia_rp->ia_sadata, ar_s.ar_data, DAPL_ATS_NBYTES);
(void) ibt_deregister_ar(daplka_dev->daplka_clnt_hdl, &ar_s);
ia_rp->ia_ar_registered = B_FALSE;
}
/*
* destroy hash tables. make sure resources are
* destroyed in the correct order.
*/
daplka_hash_destroy(&ia_rp->ia_mw_htbl);
daplka_hash_destroy(&ia_rp->ia_mr_htbl);
daplka_hash_destroy(&ia_rp->ia_ep_htbl);
daplka_hash_destroy(&ia_rp->ia_srq_htbl);
daplka_hash_destroy(&ia_rp->ia_evd_htbl);
daplka_hash_destroy(&ia_rp->ia_cno_htbl);
daplka_hash_destroy(&ia_rp->ia_pd_htbl);
daplka_hash_destroy(&ia_rp->ia_sp_htbl);
/*
* free the async evd list
*/
cnt = 0;
hkp = ia_rp->ia_async_evd_hkeys;
while (hkp != NULL) {
daplka_async_evd_hkey_t *free_hkp;
cnt++;
free_hkp = hkp;
hkp = hkp->aeh_next;
kmem_free(free_hkp, sizeof (*free_hkp));
}
if (cnt > 0) {
D3("ia_destroy: freed %d hkeys\n", cnt);
}
mutex_destroy(&ia_rp->ia_lock);
cv_destroy(&ia_rp->ia_cv);
ia_rp->ia_hca_hdl = NULL;
DAPLKA_RS_FINI(ia_rp);
if (ia_rp->ia_hca)
DAPLKA_RELE_HCA(daplka_dev, ia_rp->ia_hca);
kmem_free(ia_rp, sizeof (daplka_ia_resource_t));
D3("ia_destroy: exiting, ia_rp 0x%p\n", ia_rp);
return (0);
}
static void
daplka_async_event_create(ibt_async_code_t code, ibt_async_event_t *event,
uint64_t cookie, daplka_ia_resource_t *ia_rp)
{
daplka_evd_event_t *evp;
daplka_evd_resource_t *async_evd;
daplka_async_evd_hkey_t *curr;
mutex_enter(&ia_rp->ia_lock);
curr = ia_rp->ia_async_evd_hkeys;
while (curr != NULL) {
/*
* Note: this allocation does not zero out the buffer
* since we init all the fields.
*/
evp = kmem_alloc(sizeof (daplka_evd_event_t), KM_NOSLEEP);
if (evp == NULL) {
DERR("async_event_enqueue: event alloc failed"
"!found\n", ia_rp, curr->aeh_evd_hkey);
curr = curr->aeh_next;
continue;
}
evp->ee_next = NULL;
evp->ee_aev.ibae_type = code;
evp->ee_aev.ibae_hca_guid = event->ev_hca_guid;
evp->ee_aev.ibae_cookie = cookie;
evp->ee_aev.ibae_port = event->ev_port;
/*
* Lookup the async evd corresponding to this ia and enqueue
* evp and wakeup any waiter.
*/
async_evd = (daplka_evd_resource_t *)
daplka_hash_lookup(&ia_rp->ia_evd_htbl, curr->aeh_evd_hkey);
if (async_evd == NULL) { /* async evd is being freed */
DERR("async_event_enqueue: ia_rp(%p) asycn_evd %llx "
"!found\n", ia_rp, (longlong_t)curr->aeh_evd_hkey);
kmem_free(evp, sizeof (daplka_evd_event_t));
curr = curr->aeh_next;
continue;
}
daplka_evd_wakeup(async_evd, &async_evd->evd_async_events, evp);
/* decrement refcnt on async_evd */
DAPLKA_RS_UNREF(async_evd);
curr = curr->aeh_next;
}
mutex_exit(&ia_rp->ia_lock);
}
/*
* This routine is called in kernel context
*/
/* ARGSUSED */
static void
daplka_rc_async_handler(void *clnt_private, ibt_hca_hdl_t hca_hdl,
ibt_async_code_t code, ibt_async_event_t *event)
{
daplka_ep_resource_t *epp;
daplka_ia_resource_t *ia_rp;
minor_t ia_rnum;
if (event->ev_chan_hdl == NULL) {
DERR("daplka_rc_async_handler: ev_chan_hdl is NULL\n");
return;
}
mutex_enter(&daplka_dev->daplka_mutex);
epp = ibt_get_chan_private(event->ev_chan_hdl);
if (epp == NULL) {
mutex_exit(&daplka_dev->daplka_mutex);
DERR("daplka_rc_async_handler: chan_private is NULL\n");
return;
}
/* grab a reference to this ep */
DAPLKA_RS_REF(epp);
mutex_exit(&daplka_dev->daplka_mutex);
/*
* The endpoint resource has the resource number corresponding to
* the IA resource. Use that to lookup the ia resource entry
*/
ia_rnum = DAPLKA_RS_RNUM(epp);
ia_rp = (daplka_ia_resource_t *)daplka_resource_lookup(ia_rnum);
if ((ia_rp == NULL) || DAPLKA_RS_RESERVED(ia_rp)) {
D2("daplka_rc_async_handler: resource (%d) not found\n",
ia_rnum);
DAPLKA_RS_UNREF(epp);
return;
}
/*
* Create an async event and chain it to the async evd
*/
daplka_async_event_create(code, event, epp->ep_cookie, ia_rp);
DAPLKA_RS_UNREF(ia_rp);
DAPLKA_RS_UNREF(epp);
}
/*
* This routine is called in kernel context
*/
/* ARGSUSED */
static void
daplka_cq_async_handler(void *clnt_private, ibt_hca_hdl_t hca_hdl,
ibt_async_code_t code, ibt_async_event_t *event)
{
daplka_evd_resource_t *evdp;
daplka_ia_resource_t *ia_rp;
minor_t ia_rnum;
if (event->ev_cq_hdl == NULL)
return;
mutex_enter(&daplka_dev->daplka_mutex);
evdp = ibt_get_cq_private(event->ev_cq_hdl);
if (evdp == NULL) {
mutex_exit(&daplka_dev->daplka_mutex);
DERR("daplka_cq_async_handler: get cq private(%p) failed\n",
event->ev_cq_hdl);
return;
}
/* grab a reference to this evd resource */
DAPLKA_RS_REF(evdp);
mutex_exit(&daplka_dev->daplka_mutex);
/*
* The endpoint resource has the resource number corresponding to
* the IA resource. Use that to lookup the ia resource entry
*/
ia_rnum = DAPLKA_RS_RNUM(evdp);
ia_rp = (daplka_ia_resource_t *)daplka_resource_lookup(ia_rnum);
if ((ia_rp == NULL) || DAPLKA_RS_RESERVED(ia_rp)) {
DERR("daplka_cq_async_handler: resource (%d) not found\n",
ia_rnum);
DAPLKA_RS_UNREF(evdp);
return;
}
/*
* Create an async event and chain it to the async evd
*/
daplka_async_event_create(code, event, evdp->evd_cookie, ia_rp);
/* release all the refcount that were acquired */
DAPLKA_RS_UNREF(ia_rp);
DAPLKA_RS_UNREF(evdp);
}
/*
* This routine is called in kernel context, handles unaffiliated async errors
*/
/* ARGSUSED */
static void
daplka_un_async_handler(void *clnt_private, ibt_hca_hdl_t hca_hdl,
ibt_async_code_t code, ibt_async_event_t *event)
{
int i, j;
daplka_resource_blk_t *blk;
daplka_resource_t *rp;
daplka_ia_resource_t *ia_rp;
/*
* Walk the resource table looking for an ia that matches the
* hca_hdl.
*/
rw_enter(&daplka_resource.daplka_rct_lock, RW_READER);
for (i = 0; i < daplka_resource.daplka_rc_len; i++) {
blk = daplka_resource.daplka_rc_root[i];
if (blk == NULL)
continue;
for (j = 0; j < DAPLKA_RC_BLKSZ; j++) {
rp = blk->daplka_rcblk_blks[j];
if ((rp == NULL) ||
((intptr_t)rp == DAPLKA_RC_RESERVED) ||
(rp->rs_type != DAPL_TYPE_IA)) {
continue;
}
/*
* rp is an IA resource check if it belongs
* to the hca/port for which we got the event
*/
ia_rp = (daplka_ia_resource_t *)rp;
DAPLKA_RS_REF(ia_rp);
if ((hca_hdl == ia_rp->ia_hca_hdl) &&
(event->ev_port == ia_rp->ia_port_num)) {
/*
* walk the ep hash table. Acquire a
* reader lock. NULL dgid indicates
* local port up event.
*/
daplka_hash_walk(&ia_rp->ia_ep_htbl,
daplka_ep_failback, NULL, RW_READER);
}
DAPLKA_RS_UNREF(ia_rp);
}
}
rw_exit(&daplka_resource.daplka_rct_lock);
}
static int
daplka_handle_hca_detach_event(ibt_async_event_t *event)
{
daplka_hca_t *hca;
/*
* find the hca with the matching guid
*/
mutex_enter(&daplka_dev->daplka_mutex);
for (hca = daplka_dev->daplka_hca_list_head; hca != NULL;
hca = hca->hca_next) {
if (hca->hca_guid == event->ev_hca_guid) {
if (DAPLKA_HCA_BUSY(hca)) {
mutex_exit(&daplka_dev->daplka_mutex);
return (IBT_HCA_RESOURCES_NOT_FREED);
}
daplka_dequeue_hca(daplka_dev, hca);
break;
}
}
mutex_exit(&daplka_dev->daplka_mutex);
if (hca == NULL)
return (IBT_FAILURE);
return (daplka_fini_hca(daplka_dev, hca));
}
/*
* This routine is called in kernel context
*/
static void
daplka_async_handler(void *clnt_private, ibt_hca_hdl_t hca_hdl,
ibt_async_code_t code, ibt_async_event_t *event)
{
switch (code) {
case IBT_ERROR_CATASTROPHIC_CHAN:
case IBT_ERROR_INVALID_REQUEST_CHAN:
case IBT_ERROR_ACCESS_VIOLATION_CHAN:
case IBT_ERROR_PATH_MIGRATE_REQ:
D2("daplka_async_handler(): Channel affiliated=0x%x\n", code);
/* These events are affiliated with a the RC channel */
daplka_rc_async_handler(clnt_private, hca_hdl, code, event);
break;
case IBT_ERROR_CQ:
/* This event is affiliated with a the CQ */
D2("daplka_async_handler(): IBT_ERROR_CQ\n");
daplka_cq_async_handler(clnt_private, hca_hdl, code, event);
break;
case IBT_ERROR_PORT_DOWN:
D2("daplka_async_handler(): IBT_PORT_DOWN\n");
break;
case IBT_EVENT_PORT_UP:
D2("daplka_async_handler(): IBT_PORT_UP\n");
if (daplka_apm) {
daplka_un_async_handler(clnt_private, hca_hdl, code,
event);
}
break;
case IBT_HCA_ATTACH_EVENT:
/*
* NOTE: In some error recovery paths, it is possible to
* receive IBT_HCA_ATTACH_EVENTs on already known HCAs.
*/
D2("daplka_async_handler(): IBT_HCA_ATTACH\n");
(void) daplka_init_hca(daplka_dev, event->ev_hca_guid);
break;
case IBT_HCA_DETACH_EVENT:
D2("daplka_async_handler(): IBT_HCA_DETACH\n");
/* Free all hca resources and close the HCA. */
(void) daplka_handle_hca_detach_event(event);
break;
case IBT_EVENT_PATH_MIGRATED:
/* This event is affiliated with APM */
D2("daplka_async_handler(): IBT_PATH_MIGRATED.\n");
break;
default:
D2("daplka_async_handler(): unhandled code = 0x%x\n", code);
break;
}
}
/*
* This routine is called in kernel context related to Subnet events
*/
/*ARGSUSED*/
static void
daplka_sm_notice_handler(void *arg, ib_gid_t gid, ibt_subnet_event_code_t code,
ibt_subnet_event_t *event)
{
ib_gid_t *sgid = &gid;
ib_gid_t *dgid;
dgid = &event->sm_notice_gid;
switch (code) {
case IBT_SM_EVENT_GID_AVAIL:
/* This event is affiliated with remote port up */
D2("daplka_sm_notice_handler(): IBT_SM_EVENT_GID_AVAIL\n");
if (daplka_apm)
daplka_sm_gid_avail(sgid, dgid);
return;
case IBT_SM_EVENT_GID_UNAVAIL:
/* This event is affiliated with remote port down */
D2("daplka_sm_notice_handler(): IBT_SM_EVENT_GID_UNAVAIL\n");
return;
default:
D2("daplka_sm_notice_handler(): unhandled IBT_SM_EVENT_[%d]\n",
code);
return;
}
}
/*
* This routine is called in kernel context, handles Subnet GID avail events
* which correspond to remote port up. Setting up alternate path or path
* migration (failback) has to be initiated from the active side of the
* original connect.
*/
static void
daplka_sm_gid_avail(ib_gid_t *sgid, ib_gid_t *dgid)
{
int i, j;
daplka_resource_blk_t *blk;
daplka_resource_t *rp;
daplka_ia_resource_t *ia_rp;
D2("daplka_sm_gid_avail: sgid=%llx:%llx dgid=%llx:%llx\n",
(longlong_t)sgid->gid_prefix, (longlong_t)sgid->gid_guid,
(longlong_t)dgid->gid_prefix, (longlong_t)dgid->gid_guid);
/*
* Walk the resource table looking for an ia that matches the sgid
*/
rw_enter(&daplka_resource.daplka_rct_lock, RW_READER);
for (i = 0; i < daplka_resource.daplka_rc_len; i++) {
blk = daplka_resource.daplka_rc_root[i];
if (blk == NULL)
continue;
for (j = 0; j < DAPLKA_RC_BLKSZ; j++) {
rp = blk->daplka_rcblk_blks[j];
if ((rp == NULL) ||
((intptr_t)rp == DAPLKA_RC_RESERVED) ||
(rp->rs_type != DAPL_TYPE_IA)) {
continue;
}
/*
* rp is an IA resource check if its gid
* matches with the calling sgid
*/
ia_rp = (daplka_ia_resource_t *)rp;
DAPLKA_RS_REF(ia_rp);
if ((sgid->gid_prefix ==
ia_rp->ia_hca_sgid.gid_prefix) &&
(sgid->gid_guid == ia_rp->ia_hca_sgid.gid_guid)) {
/*
* walk the ep hash table. Acquire a
* reader lock.
*/
daplka_hash_walk(&ia_rp->ia_ep_htbl,
daplka_ep_failback,
(void *)dgid, RW_READER);
}
DAPLKA_RS_UNREF(ia_rp);
}
}
rw_exit(&daplka_resource.daplka_rct_lock);
}
/*
* This routine is called in kernel context to get and set an alternate path
*/
static int
daplka_ep_altpath(daplka_ep_resource_t *ep_rp, ib_gid_t *dgid)
{
ibt_alt_path_info_t path_info;
ibt_alt_path_attr_t path_attr;
ibt_ap_returns_t ap_rets;
ibt_status_t status;
D2("daplka_ep_altpath : ibt_get_alt_path()\n");
bzero(&path_info, sizeof (ibt_alt_path_info_t));
bzero(&path_attr, sizeof (ibt_alt_path_attr_t));
if (dgid != NULL) {
path_attr.apa_sgid = ep_rp->ep_sgid;
path_attr.apa_dgid = *dgid;
}
status = ibt_get_alt_path(ep_rp->ep_chan_hdl, IBT_PATH_AVAIL,
&path_attr, &path_info);
if (status != IBT_SUCCESS) {
DERR("daplka_ep_altpath : ibt_get_alt_path failed %d\n",
status);
return (1);
}
D2("daplka_ep_altpath : ibt_set_alt_path()\n");
bzero(&ap_rets, sizeof (ibt_ap_returns_t));
status = ibt_set_alt_path(ep_rp->ep_chan_hdl, IBT_BLOCKING,
&path_info, NULL, 0, &ap_rets);
if ((status != IBT_SUCCESS) ||
(ap_rets.ap_status != IBT_CM_AP_LOADED)) {
DERR("daplka_ep_altpath : ibt_set_alt_path failed "
"status %d ap_status %d\n", status, ap_rets.ap_status);
return (1);
}
return (0);
}
/*
* This routine is called in kernel context to failback to the original path
*/
static int
daplka_ep_failback(void *objp, void *arg)
{
daplka_ep_resource_t *ep_rp = (daplka_ep_resource_t *)objp;
ib_gid_t *dgid;
ibt_status_t status;
ibt_rc_chan_query_attr_t chan_attrs;
int i;
ASSERT(DAPLKA_RS_TYPE(ep_rp) == DAPL_TYPE_EP);
D2("daplka_ep_failback ep : sgid=%llx:%llx dgid=%llx:%llx\n",
(longlong_t)ep_rp->ep_sgid.gid_prefix,
(longlong_t)ep_rp->ep_sgid.gid_guid,
(longlong_t)ep_rp->ep_dgid.gid_prefix,
(longlong_t)ep_rp->ep_dgid.gid_guid);
/*
* daplka_ep_failback is called from daplka_hash_walk
* which holds the read lock on hash table to protect
* the endpoint resource from removal
*/
mutex_enter(&ep_rp->ep_lock);
/* check for unconnected endpoints */
/* first check for ep state */
if (ep_rp->ep_state != DAPLKA_EP_STATE_CONNECTED) {
mutex_exit(&ep_rp->ep_lock);
D2("daplka_ep_failback : endpoints not connected\n");
return (0);
}
/* second check for gids */
if (((ep_rp->ep_sgid.gid_prefix == 0) &&
(ep_rp->ep_sgid.gid_guid == 0)) ||
((ep_rp->ep_dgid.gid_prefix == 0) &&
(ep_rp->ep_dgid.gid_guid == 0))) {
mutex_exit(&ep_rp->ep_lock);
D2("daplka_ep_failback : skip unconnected endpoints\n");
return (0);
}
/*
* matching destination ep
* when dgid is NULL, the async event is a local port up.
* dgid becomes wild card, i.e. all endpoints match
*/
dgid = (ib_gid_t *)arg;
if (dgid == NULL) {
/* ignore loopback ep */
if ((ep_rp->ep_sgid.gid_prefix == ep_rp->ep_dgid.gid_prefix) &&
(ep_rp->ep_sgid.gid_guid == ep_rp->ep_dgid.gid_guid)) {
mutex_exit(&ep_rp->ep_lock);
D2("daplka_ep_failback : skip loopback endpoints\n");
return (0);
}
} else {
/* matching remote ep */
if ((ep_rp->ep_dgid.gid_prefix != dgid->gid_prefix) ||
(ep_rp->ep_dgid.gid_guid != dgid->gid_guid)) {
mutex_exit(&ep_rp->ep_lock);
D2("daplka_ep_failback : unrelated endpoints\n");
return (0);
}
}
/* call get and set altpath with original dgid used in ep_connect */
if (daplka_ep_altpath(ep_rp, &ep_rp->ep_dgid)) {
mutex_exit(&ep_rp->ep_lock);
return (0);
}
/*
* wait for migration state to be ARMed
* e.g. a post_send msg will transit mig_state from REARM to ARM
*/
for (i = 0; i < daplka_query_aft_setaltpath; i++) {
bzero(&chan_attrs, sizeof (ibt_rc_chan_query_attr_t));
status = ibt_query_rc_channel(ep_rp->ep_chan_hdl, &chan_attrs);
if (status != IBT_SUCCESS) {
mutex_exit(&ep_rp->ep_lock);
DERR("daplka_ep_altpath : ibt_query_rc_channel err\n");
return (0);
}
if (chan_attrs.rc_mig_state == IBT_STATE_ARMED)
break;
}
D2("daplka_ep_altpath : query[%d] mig_st=%d\n",
i, chan_attrs.rc_mig_state);
D2("daplka_ep_altpath : P sgid=%llx:%llx dgid=%llx:%llx\n",
(longlong_t)
chan_attrs.rc_prim_path.cep_adds_vect.av_sgid.gid_prefix,
(longlong_t)chan_attrs.rc_prim_path.cep_adds_vect.av_sgid.gid_guid,
(longlong_t)
chan_attrs.rc_prim_path.cep_adds_vect.av_dgid.gid_prefix,
(longlong_t)chan_attrs.rc_prim_path.cep_adds_vect.av_dgid.gid_guid);
D2("daplka_ep_altpath : A sgid=%llx:%llx dgid=%llx:%llx\n",
(longlong_t)chan_attrs.rc_alt_path.cep_adds_vect.av_sgid.gid_prefix,
(longlong_t)chan_attrs.rc_alt_path.cep_adds_vect.av_sgid.gid_guid,
(longlong_t)chan_attrs.rc_alt_path.cep_adds_vect.av_dgid.gid_prefix,
(longlong_t)chan_attrs.rc_alt_path.cep_adds_vect.av_dgid.gid_guid);
/* skip failback on ARMed state not reached or env override */
if ((i >= daplka_query_aft_setaltpath) || (daplka_failback == 0)) {
mutex_exit(&ep_rp->ep_lock);
DERR("daplka_ep_altpath : ARMed state not reached\n");
return (0);
}
D2("daplka_ep_failback : ibt_migrate_path() to original ep\n");
status = ibt_migrate_path(ep_rp->ep_chan_hdl);
if (status != IBT_SUCCESS) {
mutex_exit(&ep_rp->ep_lock);
DERR("daplka_ep_failback : migration failed "
"status %d\n", status);
return (0);
}
/* call get and altpath with NULL dgid to indicate unspecified dgid */
(void) daplka_ep_altpath(ep_rp, NULL);
mutex_exit(&ep_rp->ep_lock);
return (0);
}
/*
* IBTF wrappers used for resource accounting
*/
static ibt_status_t
daplka_ibt_alloc_rc_channel(daplka_ep_resource_t *ep_rp, ibt_hca_hdl_t hca_hdl,
ibt_chan_alloc_flags_t flags, ibt_rc_chan_alloc_args_t *args,
ibt_channel_hdl_t *chan_hdl_p, ibt_chan_sizes_t *sizes)
{
daplka_hca_t *hca_p;
uint32_t max_qps;
boolean_t acct_enabled;
ibt_status_t status;
acct_enabled = daplka_accounting_enabled;
hca_p = ep_rp->ep_hca;
max_qps = daplka_max_qp_percent * hca_p->hca_attr.hca_max_chans / 100;
if (acct_enabled) {
if (daplka_max_qp_percent != 0 &&
max_qps <= hca_p->hca_qp_count) {
DERR("ibt_alloc_rc_channel: resource limit exceeded "
"(limit %d, count %d)\n", max_qps,
hca_p->hca_qp_count);
return (IBT_INSUFF_RESOURCE);
}
DAPLKA_RS_ACCT_INC(ep_rp, 1);
atomic_inc_32(&hca_p->hca_qp_count);
}
status = ibt_alloc_rc_channel(hca_hdl, flags, args, chan_hdl_p, sizes);
if (status != IBT_SUCCESS && acct_enabled) {
DAPLKA_RS_ACCT_DEC(ep_rp, 1);
atomic_dec_32(&hca_p->hca_qp_count);
}
return (status);
}
static ibt_status_t
daplka_ibt_free_channel(daplka_ep_resource_t *ep_rp, ibt_channel_hdl_t chan_hdl)
{
daplka_hca_t *hca_p;
ibt_status_t status;
hca_p = ep_rp->ep_hca;
status = ibt_free_channel(chan_hdl);
if (status != IBT_SUCCESS) {
return (status);
}
if (DAPLKA_RS_ACCT_CHARGED(ep_rp) > 0) {
DAPLKA_RS_ACCT_DEC(ep_rp, 1);
atomic_dec_32(&hca_p->hca_qp_count);
}
return (status);
}
static ibt_status_t
daplka_ibt_alloc_cq(daplka_evd_resource_t *evd_rp, ibt_hca_hdl_t hca_hdl,
ibt_cq_attr_t *cq_attr, ibt_cq_hdl_t *ibt_cq_p, uint32_t *real_size)
{
daplka_hca_t *hca_p;
uint32_t max_cqs;
boolean_t acct_enabled;
ibt_status_t status;
acct_enabled = daplka_accounting_enabled;
hca_p = evd_rp->evd_hca;
max_cqs = daplka_max_cq_percent * hca_p->hca_attr.hca_max_cq / 100;
if (acct_enabled) {
if (daplka_max_cq_percent != 0 &&
max_cqs <= hca_p->hca_cq_count) {
DERR("ibt_alloc_cq: resource limit exceeded "
"(limit %d, count %d)\n", max_cqs,
hca_p->hca_cq_count);
return (IBT_INSUFF_RESOURCE);
}
DAPLKA_RS_ACCT_INC(evd_rp, 1);
atomic_inc_32(&hca_p->hca_cq_count);
}
status = ibt_alloc_cq(hca_hdl, cq_attr, ibt_cq_p, real_size);
if (status != IBT_SUCCESS && acct_enabled) {
DAPLKA_RS_ACCT_DEC(evd_rp, 1);
atomic_dec_32(&hca_p->hca_cq_count);
}
return (status);
}
static ibt_status_t
daplka_ibt_free_cq(daplka_evd_resource_t *evd_rp, ibt_cq_hdl_t cq_hdl)
{
daplka_hca_t *hca_p;
ibt_status_t status;
hca_p = evd_rp->evd_hca;
status = ibt_free_cq(cq_hdl);
if (status != IBT_SUCCESS) {
return (status);
}
if (DAPLKA_RS_ACCT_CHARGED(evd_rp) > 0) {
DAPLKA_RS_ACCT_DEC(evd_rp, 1);
atomic_dec_32(&hca_p->hca_cq_count);
}
return (status);
}
static ibt_status_t
daplka_ibt_alloc_pd(daplka_pd_resource_t *pd_rp, ibt_hca_hdl_t hca_hdl,
ibt_pd_flags_t flags, ibt_pd_hdl_t *pd_hdl_p)
{
daplka_hca_t *hca_p;
uint32_t max_pds;
boolean_t acct_enabled;
ibt_status_t status;
acct_enabled = daplka_accounting_enabled;
hca_p = pd_rp->pd_hca;
max_pds = daplka_max_pd_percent * hca_p->hca_attr.hca_max_pd / 100;
if (acct_enabled) {
if (daplka_max_pd_percent != 0 &&
max_pds <= hca_p->hca_pd_count) {
DERR("ibt_alloc_pd: resource limit exceeded "
"(limit %d, count %d)\n", max_pds,
hca_p->hca_pd_count);
return (IBT_INSUFF_RESOURCE);
}
DAPLKA_RS_ACCT_INC(pd_rp, 1);
atomic_inc_32(&hca_p->hca_pd_count);
}
status = ibt_alloc_pd(hca_hdl, flags, pd_hdl_p);
if (status != IBT_SUCCESS && acct_enabled) {
DAPLKA_RS_ACCT_DEC(pd_rp, 1);
atomic_dec_32(&hca_p->hca_pd_count);
}
return (status);
}
static ibt_status_t
daplka_ibt_free_pd(daplka_pd_resource_t *pd_rp, ibt_hca_hdl_t hca_hdl,
ibt_pd_hdl_t pd_hdl)
{
daplka_hca_t *hca_p;
ibt_status_t status;
hca_p = pd_rp->pd_hca;
status = ibt_free_pd(hca_hdl, pd_hdl);
if (status != IBT_SUCCESS) {
return (status);
}
if (DAPLKA_RS_ACCT_CHARGED(pd_rp) > 0) {
DAPLKA_RS_ACCT_DEC(pd_rp, 1);
atomic_dec_32(&hca_p->hca_pd_count);
}
return (status);
}
static ibt_status_t
daplka_ibt_alloc_mw(daplka_mw_resource_t *mw_rp, ibt_hca_hdl_t hca_hdl,
ibt_pd_hdl_t pd_hdl, ibt_mw_flags_t flags, ibt_mw_hdl_t *mw_hdl_p,
ibt_rkey_t *rkey_p)
{
daplka_hca_t *hca_p;
uint32_t max_mws;
boolean_t acct_enabled;
ibt_status_t status;
acct_enabled = daplka_accounting_enabled;
hca_p = mw_rp->mw_hca;
max_mws = daplka_max_mw_percent * hca_p->hca_attr.hca_max_mem_win / 100;
if (acct_enabled) {
if (daplka_max_mw_percent != 0 &&
max_mws <= hca_p->hca_mw_count) {
DERR("ibt_alloc_mw: resource limit exceeded "
"(limit %d, count %d)\n", max_mws,
hca_p->hca_mw_count);
return (IBT_INSUFF_RESOURCE);
}
DAPLKA_RS_ACCT_INC(mw_rp, 1);
atomic_inc_32(&hca_p->hca_mw_count);
}
status = ibt_alloc_mw(hca_hdl, pd_hdl, flags, mw_hdl_p, rkey_p);
if (status != IBT_SUCCESS && acct_enabled) {
DAPLKA_RS_ACCT_DEC(mw_rp, 1);
atomic_dec_32(&hca_p->hca_mw_count);
}
return (status);
}
static ibt_status_t
daplka_ibt_free_mw(daplka_mw_resource_t *mw_rp, ibt_hca_hdl_t hca_hdl,
ibt_mw_hdl_t mw_hdl)
{
daplka_hca_t *hca_p;
ibt_status_t status;
hca_p = mw_rp->mw_hca;
status = ibt_free_mw(hca_hdl, mw_hdl);
if (status != IBT_SUCCESS) {
return (status);
}
if (DAPLKA_RS_ACCT_CHARGED(mw_rp) > 0) {
DAPLKA_RS_ACCT_DEC(mw_rp, 1);
atomic_dec_32(&hca_p->hca_mw_count);
}
return (status);
}
static ibt_status_t
daplka_ibt_register_mr(daplka_mr_resource_t *mr_rp, ibt_hca_hdl_t hca_hdl,
ibt_pd_hdl_t pd_hdl, ibt_mr_attr_t *mr_attr, ibt_mr_hdl_t *mr_hdl_p,
ibt_mr_desc_t *mr_desc_p)
{
daplka_hca_t *hca_p;
uint32_t max_mrs;
boolean_t acct_enabled;
ibt_status_t status;
acct_enabled = daplka_accounting_enabled;
hca_p = mr_rp->mr_hca;
max_mrs = daplka_max_mr_percent * hca_p->hca_attr.hca_max_memr / 100;
if (acct_enabled) {
if (daplka_max_mr_percent != 0 &&
max_mrs <= hca_p->hca_mr_count) {
DERR("ibt_register_mr: resource limit exceeded "
"(limit %d, count %d)\n", max_mrs,
hca_p->hca_mr_count);
return (IBT_INSUFF_RESOURCE);
}
DAPLKA_RS_ACCT_INC(mr_rp, 1);
atomic_inc_32(&hca_p->hca_mr_count);
}
status = ibt_register_mr(hca_hdl, pd_hdl, mr_attr, mr_hdl_p, mr_desc_p);
if (status != IBT_SUCCESS && acct_enabled) {
DAPLKA_RS_ACCT_DEC(mr_rp, 1);
atomic_dec_32(&hca_p->hca_mr_count);
}
return (status);
}
static ibt_status_t
daplka_ibt_register_shared_mr(daplka_mr_resource_t *mr_rp,
ibt_hca_hdl_t hca_hdl, ibt_mr_hdl_t mr_hdl, ibt_pd_hdl_t pd_hdl,
ibt_smr_attr_t *smr_attr_p, ibt_mr_hdl_t *mr_hdl_p,
ibt_mr_desc_t *mr_desc_p)
{
daplka_hca_t *hca_p;
uint32_t max_mrs;
boolean_t acct_enabled;
ibt_status_t status;
acct_enabled = daplka_accounting_enabled;
hca_p = mr_rp->mr_hca;
max_mrs = daplka_max_mr_percent * hca_p->hca_attr.hca_max_memr / 100;
if (acct_enabled) {
if (daplka_max_mr_percent != 0 &&
max_mrs <= hca_p->hca_mr_count) {
DERR("ibt_register_shared_mr: resource limit exceeded "
"(limit %d, count %d)\n", max_mrs,
hca_p->hca_mr_count);
return (IBT_INSUFF_RESOURCE);
}
DAPLKA_RS_ACCT_INC(mr_rp, 1);
atomic_inc_32(&hca_p->hca_mr_count);
}
status = ibt_register_shared_mr(hca_hdl, mr_hdl, pd_hdl,
smr_attr_p, mr_hdl_p, mr_desc_p);
if (status != IBT_SUCCESS && acct_enabled) {
DAPLKA_RS_ACCT_DEC(mr_rp, 1);
atomic_dec_32(&hca_p->hca_mr_count);
}
return (status);
}
static ibt_status_t
daplka_ibt_deregister_mr(daplka_mr_resource_t *mr_rp, ibt_hca_hdl_t hca_hdl,
ibt_mr_hdl_t mr_hdl)
{
daplka_hca_t *hca_p;
ibt_status_t status;
hca_p = mr_rp->mr_hca;
status = ibt_deregister_mr(hca_hdl, mr_hdl);
if (status != IBT_SUCCESS) {
return (status);
}
if (DAPLKA_RS_ACCT_CHARGED(mr_rp) > 0) {
DAPLKA_RS_ACCT_DEC(mr_rp, 1);
atomic_dec_32(&hca_p->hca_mr_count);
}
return (status);
}
static ibt_status_t
daplka_ibt_alloc_srq(daplka_srq_resource_t *srq_rp, ibt_hca_hdl_t hca_hdl,
ibt_srq_flags_t flags, ibt_pd_hdl_t pd, ibt_srq_sizes_t *reqsz,
ibt_srq_hdl_t *srq_hdl_p, ibt_srq_sizes_t *realsz)
{
daplka_hca_t *hca_p;
uint32_t max_srqs;
boolean_t acct_enabled;
ibt_status_t status;
acct_enabled = daplka_accounting_enabled;
hca_p = srq_rp->srq_hca;
max_srqs = daplka_max_srq_percent * hca_p->hca_attr.hca_max_srqs / 100;
if (acct_enabled) {
if (daplka_max_srq_percent != 0 &&
max_srqs <= hca_p->hca_srq_count) {
DERR("ibt_alloc_srq: resource limit exceeded "
"(limit %d, count %d)\n", max_srqs,
hca_p->hca_srq_count);
return (IBT_INSUFF_RESOURCE);
}
DAPLKA_RS_ACCT_INC(srq_rp, 1);
atomic_inc_32(&hca_p->hca_srq_count);
}
status = ibt_alloc_srq(hca_hdl, flags, pd, reqsz, srq_hdl_p, realsz);
if (status != IBT_SUCCESS && acct_enabled) {
DAPLKA_RS_ACCT_DEC(srq_rp, 1);
atomic_dec_32(&hca_p->hca_srq_count);
}
return (status);
}
static ibt_status_t
daplka_ibt_free_srq(daplka_srq_resource_t *srq_rp, ibt_srq_hdl_t srq_hdl)
{
daplka_hca_t *hca_p;
ibt_status_t status;
hca_p = srq_rp->srq_hca;
D3("ibt_free_srq: %p %p\n", srq_rp, srq_hdl);
status = ibt_free_srq(srq_hdl);
if (status != IBT_SUCCESS) {
return (status);
}
if (DAPLKA_RS_ACCT_CHARGED(srq_rp) > 0) {
DAPLKA_RS_ACCT_DEC(srq_rp, 1);
atomic_dec_32(&hca_p->hca_srq_count);
}
return (status);
}
static int
daplka_common_ioctl(int cmd, minor_t rnum, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
int error;
switch (cmd) {
case DAPL_IA_CREATE:
error = daplka_ia_create(rnum, arg, mode, cred, rvalp);
break;
/* can potentially add other commands here */
default:
DERR("daplka_common_ioctl: cmd not supported\n");
error = DDI_FAILURE;
}
return (error);
}
static int
daplka_evd_ioctl(int cmd, daplka_ia_resource_t *rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
int error;
switch (cmd) {
case DAPL_EVD_CREATE:
error = daplka_evd_create(rp, arg, mode, cred, rvalp);
break;
case DAPL_CQ_RESIZE:
error = daplka_cq_resize(rp, arg, mode, cred, rvalp);
break;
case DAPL_EVENT_POLL:
error = daplka_event_poll(rp, arg, mode, cred, rvalp);
break;
case DAPL_EVENT_WAKEUP:
error = daplka_event_wakeup(rp, arg, mode, cred, rvalp);
break;
case DAPL_EVD_MODIFY_CNO:
error = daplka_evd_modify_cno(rp, arg, mode, cred, rvalp);
break;
case DAPL_EVD_FREE:
error = daplka_evd_free(rp, arg, mode, cred, rvalp);
break;
default:
DERR("daplka_evd_ioctl: cmd not supported\n");
error = DDI_FAILURE;
}
return (error);
}
static int
daplka_ep_ioctl(int cmd, daplka_ia_resource_t *rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
int error;
switch (cmd) {
case DAPL_EP_MODIFY:
error = daplka_ep_modify(rp, arg, mode, cred, rvalp);
break;
case DAPL_EP_FREE:
error = daplka_ep_free(rp, arg, mode, cred, rvalp);
break;
case DAPL_EP_CONNECT:
error = daplka_ep_connect(rp, arg, mode, cred, rvalp);
break;
case DAPL_EP_DISCONNECT:
error = daplka_ep_disconnect(rp, arg, mode, cred, rvalp);
break;
case DAPL_EP_REINIT:
error = daplka_ep_reinit(rp, arg, mode, cred, rvalp);
break;
case DAPL_EP_CREATE:
error = daplka_ep_create(rp, arg, mode, cred, rvalp);
break;
default:
DERR("daplka_ep_ioctl: cmd not supported\n");
error = DDI_FAILURE;
}
return (error);
}
static int
daplka_mr_ioctl(int cmd, daplka_ia_resource_t *rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
int error;
switch (cmd) {
case DAPL_MR_REGISTER:
error = daplka_mr_register(rp, arg, mode, cred, rvalp);
break;
case DAPL_MR_REGISTER_LMR:
error = daplka_mr_register_lmr(rp, arg, mode, cred, rvalp);
break;
case DAPL_MR_REGISTER_SHARED:
error = daplka_mr_register_shared(rp, arg, mode, cred, rvalp);
break;
case DAPL_MR_DEREGISTER:
error = daplka_mr_deregister(rp, arg, mode, cred, rvalp);
break;
case DAPL_MR_SYNC:
error = daplka_mr_sync(rp, arg, mode, cred, rvalp);
break;
default:
DERR("daplka_mr_ioctl: cmd not supported\n");
error = DDI_FAILURE;
}
return (error);
}
static int
daplka_mw_ioctl(int cmd, daplka_ia_resource_t *rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
int error;
switch (cmd) {
case DAPL_MW_ALLOC:
error = daplka_mw_alloc(rp, arg, mode, cred, rvalp);
break;
case DAPL_MW_FREE:
error = daplka_mw_free(rp, arg, mode, cred, rvalp);
break;
default:
DERR("daplka_mw_ioctl: cmd not supported\n");
error = DDI_FAILURE;
}
return (error);
}
static int
daplka_cno_ioctl(int cmd, daplka_ia_resource_t *rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
int error;
switch (cmd) {
case DAPL_CNO_ALLOC:
error = daplka_cno_alloc(rp, arg, mode, cred, rvalp);
break;
case DAPL_CNO_FREE:
error = daplka_cno_free(rp, arg, mode, cred, rvalp);
break;
case DAPL_CNO_WAIT:
error = daplka_cno_wait(rp, arg, mode, cred, rvalp);
break;
default:
DERR("daplka_cno_ioctl: cmd not supported\n");
error = DDI_FAILURE;
}
return (error);
}
static int
daplka_pd_ioctl(int cmd, daplka_ia_resource_t *rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
int error;
switch (cmd) {
case DAPL_PD_ALLOC:
error = daplka_pd_alloc(rp, arg, mode, cred, rvalp);
break;
case DAPL_PD_FREE:
error = daplka_pd_free(rp, arg, mode, cred, rvalp);
break;
default:
DERR("daplka_pd_ioctl: cmd not supported\n");
error = DDI_FAILURE;
}
return (error);
}
static int
daplka_sp_ioctl(int cmd, daplka_ia_resource_t *rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
int error;
switch (cmd) {
case DAPL_SERVICE_REGISTER:
error = daplka_service_register(rp, arg, mode, cred, rvalp);
break;
case DAPL_SERVICE_DEREGISTER:
error = daplka_service_deregister(rp, arg, mode, cred, rvalp);
break;
default:
DERR("daplka_sp_ioctl: cmd not supported\n");
error = DDI_FAILURE;
}
return (error);
}
static int
daplka_srq_ioctl(int cmd, daplka_ia_resource_t *rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
int error;
switch (cmd) {
case DAPL_SRQ_CREATE:
error = daplka_srq_create(rp, arg, mode, cred, rvalp);
break;
case DAPL_SRQ_RESIZE:
error = daplka_srq_resize(rp, arg, mode, cred, rvalp);
break;
case DAPL_SRQ_FREE:
error = daplka_srq_free(rp, arg, mode, cred, rvalp);
break;
default:
DERR("daplka_srq_ioctl: cmd(%d) not supported\n", cmd);
error = DDI_FAILURE;
break;
}
return (error);
}
static int
daplka_misc_ioctl(int cmd, daplka_ia_resource_t *rp, intptr_t arg, int mode,
cred_t *cred, int *rvalp)
{
int error;
switch (cmd) {
case DAPL_CR_ACCEPT:
error = daplka_cr_accept(rp, arg, mode, cred, rvalp);
break;
case DAPL_CR_REJECT:
error = daplka_cr_reject(rp, arg, mode, cred, rvalp);
break;
case DAPL_IA_QUERY:
error = daplka_ia_query(rp, arg, mode, cred, rvalp);
break;
case DAPL_CR_HANDOFF:
error = daplka_cr_handoff(rp, arg, mode, cred, rvalp);
break;
default:
DERR("daplka_misc_ioctl: cmd not supported\n");
error = DDI_FAILURE;
}
return (error);
}
/*ARGSUSED*/
static int
daplka_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *cred,
int *rvalp)
{
daplka_ia_resource_t *ia_rp;
minor_t rnum;
int error = 0;
rnum = getminor(dev);
ia_rp = (daplka_ia_resource_t *)daplka_resource_lookup(rnum);
if (ia_rp == NULL) {
DERR("ioctl: resource not found, rnum %d\n", rnum);
return (ENXIO);
}
D4("ioctl: rnum = %d, cmd = 0x%x\n", rnum, cmd);
if (DAPLKA_RS_RESERVED(ia_rp)) {
error = daplka_common_ioctl(cmd, rnum, arg, mode, cred, rvalp);
return (error);
}
if (DAPLKA_RS_TYPE(ia_rp) != DAPL_TYPE_IA) {
DERR("ioctl: invalid type %d\n", DAPLKA_RS_TYPE(ia_rp));
error = EINVAL;
goto cleanup;
}
if (ia_rp->ia_pid != ddi_get_pid()) {
DERR("ioctl: ia_pid %d != pid %d\n",
ia_rp->ia_pid, ddi_get_pid());
error = EINVAL;
goto cleanup;
}
switch (cmd & DAPL_TYPE_MASK) {
case DAPL_TYPE_EVD:
error = daplka_evd_ioctl(cmd, ia_rp, arg, mode, cred, rvalp);
break;
case DAPL_TYPE_EP:
error = daplka_ep_ioctl(cmd, ia_rp, arg, mode, cred, rvalp);
break;
case DAPL_TYPE_MR:
error = daplka_mr_ioctl(cmd, ia_rp, arg, mode, cred, rvalp);
break;
case DAPL_TYPE_MW:
error = daplka_mw_ioctl(cmd, ia_rp, arg, mode, cred, rvalp);
break;
case DAPL_TYPE_PD:
error = daplka_pd_ioctl(cmd, ia_rp, arg, mode, cred, rvalp);
break;
case DAPL_TYPE_SP:
error = daplka_sp_ioctl(cmd, ia_rp, arg, mode, cred, rvalp);
break;
case DAPL_TYPE_CNO:
error = daplka_cno_ioctl(cmd, ia_rp, arg, mode, cred, rvalp);
break;
case DAPL_TYPE_MISC:
error = daplka_misc_ioctl(cmd, ia_rp, arg, mode, cred, rvalp);
break;
case DAPL_TYPE_SRQ:
error = daplka_srq_ioctl(cmd, ia_rp, arg, mode, cred, rvalp);
break;
default:
DERR("ioctl: invalid dapl type = %d\n", DAPLKA_RS_TYPE(ia_rp));
error = DDI_FAILURE;
}
cleanup:;
DAPLKA_RS_UNREF(ia_rp);
return (error);
}
/* ARGSUSED */
static int
daplka_open(dev_t *devp, int flag, int otyp, struct cred *cred)
{
minor_t rnum;
/*
* Char only
*/
if (otyp != OTYP_CHR) {
return (EINVAL);
}
/*
* Only zero can be opened, clones are used for resources.
*/
if (getminor(*devp) != DAPLKA_DRIVER_MINOR) {
DERR("daplka_open: bad minor %d\n", getminor(*devp));
return (ENODEV);
}
/*
* - allocate new minor number
* - update devp argument to new device
*/
if (daplka_resource_reserve(&rnum) == 0) {
*devp = makedevice(getmajor(*devp), rnum);
} else {
return (ENOMEM);
}
return (DDI_SUCCESS);
}
/* ARGSUSED */
static int
daplka_close(dev_t dev, int flag, int otyp, struct cred *cred)
{
daplka_ia_resource_t *ia_rp;
minor_t rnum = getminor(dev);
/*
* Char only
*/
if (otyp != OTYP_CHR) {
return (EINVAL);
}
D2("daplka_close: closing rnum = %d\n", rnum);
atomic_inc_32(&daplka_pending_close);
/*
* remove from resource table.
*/
ia_rp = (daplka_ia_resource_t *)daplka_resource_remove(rnum);
/*
* remove the initial reference
*/
if (ia_rp != NULL) {
DAPLKA_RS_UNREF(ia_rp);
}
atomic_dec_32(&daplka_pending_close);
return (DDI_SUCCESS);
}
/*
* Resource management routines
*
* We start with no resource array. Each time we run out of slots, we
* reallocate a new larger array and copy the pointer to the new array and
* a new resource blk is allocated and added to the hash table.
*
* The resource control block contains:
* root - array of pointer of resource blks
* sz - current size of array.
* len - last valid entry in array.
*
* A search operation based on a resource number is as follows:
* index = rnum / RESOURCE_BLKSZ;
* ASSERT(index < resource_block.len);
* ASSERT(index < resource_block.sz);
* offset = rnum % RESOURCE_BLKSZ;
* ASSERT(offset >= resource_block.root[index]->base);
* ASSERT(offset < resource_block.root[index]->base + RESOURCE_BLKSZ);
* return resource_block.root[index]->blks[offset];
*
* A resource blk is freed when its used count reaches zero.
*/
/*
* initializes the global resource table
*/
static void
daplka_resource_init(void)
{
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(daplka_resource))
rw_init(&daplka_resource.daplka_rct_lock, NULL, RW_DRIVER, NULL);
daplka_resource.daplka_rc_len = 0;
daplka_resource.daplka_rc_sz = 0;
daplka_resource.daplka_rc_cnt = 0;
daplka_resource.daplka_rc_flag = 0;
daplka_resource.daplka_rc_root = NULL;
_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(daplka_resource))
}
/*
* destroys the global resource table
*/
static void
daplka_resource_fini(void)
{
int i;
rw_enter(&daplka_resource.daplka_rct_lock, RW_WRITER);
for (i = 0; i < daplka_resource.daplka_rc_len; i++) {
daplka_resource_blk_t *blk;
int j;
blk = daplka_resource.daplka_rc_root[i];
if (blk == NULL) {
continue;
}
for (j = 0; j < DAPLKA_RC_BLKSZ; j++) {
if (blk->daplka_rcblk_blks[j] != NULL) {
DERR("resource_fini: non-null slot %d, %p\n",
j, blk->daplka_rcblk_blks[j]);
}
}
kmem_free(blk, sizeof (*blk));
daplka_resource.daplka_rc_root[i] = NULL;
}
if (daplka_resource.daplka_rc_root != NULL) {
uint_t sz;
sz = daplka_resource.daplka_rc_sz *
sizeof (daplka_resource_blk_t *);
kmem_free(daplka_resource.daplka_rc_root, (uint_t)sz);
daplka_resource.daplka_rc_root = NULL;
daplka_resource.daplka_rc_len = 0;
daplka_resource.daplka_rc_sz = 0;
}
rw_exit(&daplka_resource.daplka_rct_lock);
rw_destroy(&daplka_resource.daplka_rct_lock);
}
/*
* reserves a slot in the global resource table.
* this is called by the open() syscall. it is needed because
* at open() time, we do not have sufficient information to
* create an IA resource. the library needs to subsequently
* call daplka_ia_create to insert an IA resource into this
* reserved slot.
*/
static int
daplka_resource_reserve(minor_t *rnum)
{
int i, j, empty = -1;
daplka_resource_blk_t *blk;
rw_enter(&daplka_resource.daplka_rct_lock, RW_WRITER);
/*
* Try to find an empty slot
*/
for (i = 0; i < daplka_resource.daplka_rc_len; i++) {
blk = daplka_resource.daplka_rc_root[i];
if (blk != NULL && blk->daplka_rcblk_avail > 0) {
D3("resource_alloc: available blks %d\n",
blk->daplka_rcblk_avail);
/*
* found an empty slot in this blk
*/
for (j = 0; j < DAPLKA_RC_BLKSZ; j++) {
if (blk->daplka_rcblk_blks[j] == NULL) {
*rnum = (minor_t)
(j + (i * DAPLKA_RC_BLKSZ));
blk->daplka_rcblk_blks[j] =
(daplka_resource_t *)
DAPLKA_RC_RESERVED;
blk->daplka_rcblk_avail--;
daplka_resource.daplka_rc_cnt++;
rw_exit(&daplka_resource.
daplka_rct_lock);
return (0);
}
}
} else if (blk == NULL && empty < 0) {
/*
* remember first empty slot
*/
empty = i;
}
}
/*
* Couldn't find anything, allocate a new blk
* Do we need to reallocate the root array
*/
if (empty < 0) {
if (daplka_resource.daplka_rc_len ==
daplka_resource.daplka_rc_sz) {
/*
* Allocate new array and copy current stuff into it
*/
daplka_resource_blk_t **p;
uint_t newsz = (uint_t)daplka_resource.daplka_rc_sz +
DAPLKA_RC_BLKSZ;
D3("resource_alloc: increasing no. of buckets to %d\n",
newsz);
p = kmem_zalloc(newsz * sizeof (*p), daplka_km_flags);
if (daplka_resource.daplka_rc_root) {
uint_t oldsz;
oldsz = (uint_t)(daplka_resource.daplka_rc_sz *
(int)sizeof (*p));
/*
* Copy old data into new space and
* free old stuff
*/
bcopy(daplka_resource.daplka_rc_root, p, oldsz);
kmem_free(daplka_resource.daplka_rc_root,
oldsz);
}
daplka_resource.daplka_rc_root = p;
daplka_resource.daplka_rc_sz = (int)newsz;
}
empty = daplka_resource.daplka_rc_len;
daplka_resource.daplka_rc_len++;
D3("resource_alloc: daplka_rc_len %d\n",
daplka_resource.daplka_rc_len);
}
/*
* Allocate a new blk
*/
blk = kmem_zalloc(sizeof (*blk), daplka_km_flags);
ASSERT(daplka_resource.daplka_rc_root[empty] == NULL);
daplka_resource.daplka_rc_root[empty] = blk;
blk->daplka_rcblk_avail = DAPLKA_RC_BLKSZ - 1;
/*
* Allocate slot
*/
*rnum = (minor_t)(empty * DAPLKA_RC_BLKSZ);
blk->daplka_rcblk_blks[0] = (daplka_resource_t *)DAPLKA_RC_RESERVED;
daplka_resource.daplka_rc_cnt++;
rw_exit(&daplka_resource.daplka_rct_lock);
return (0);
}
/*
* removes resource from global resource table
*/
static daplka_resource_t *
daplka_resource_remove(minor_t rnum)
{
int i, j;
daplka_resource_blk_t *blk;
daplka_resource_t *p;
i = (int)(rnum / DAPLKA_RC_BLKSZ);
j = (int)(rnum % DAPLKA_RC_BLKSZ);
rw_enter(&daplka_resource.daplka_rct_lock, RW_WRITER);
if (i >= daplka_resource.daplka_rc_len) {
rw_exit(&daplka_resource.daplka_rct_lock);
DERR("resource_remove: invalid rnum %d\n", rnum);
return (NULL);
}
ASSERT(daplka_resource.daplka_rc_root);
ASSERT(i < daplka_resource.daplka_rc_len);
ASSERT(i < daplka_resource.daplka_rc_sz);
blk = daplka_resource.daplka_rc_root[i];
if (blk == NULL) {
rw_exit(&daplka_resource.daplka_rct_lock);
DERR("resource_remove: invalid rnum %d\n", rnum);
return (NULL);
}
if (blk->daplka_rcblk_blks[j] == NULL) {
rw_exit(&daplka_resource.daplka_rct_lock);
DERR("resource_remove: blk->daplka_rcblk_blks[j] == NULL\n");
return (NULL);
}
p = blk->daplka_rcblk_blks[j];
blk->daplka_rcblk_blks[j] = NULL;
blk->daplka_rcblk_avail++;
if (blk->daplka_rcblk_avail == DAPLKA_RC_BLKSZ) {
/*
* free this blk
*/
kmem_free(blk, sizeof (*blk));
daplka_resource.daplka_rc_root[i] = NULL;
}
daplka_resource.daplka_rc_cnt--;
rw_exit(&daplka_resource.daplka_rct_lock);
if ((intptr_t)p == DAPLKA_RC_RESERVED) {
return (NULL);
} else {
return (p);
}
}
/*
* inserts resource into the slot designated by rnum
*/
static int
daplka_resource_insert(minor_t rnum, daplka_resource_t *rp)
{
int i, j, error = -1;
daplka_resource_blk_t *blk;
/*
* Find resource and lock it in WRITER mode
* search for available resource slot
*/
i = (int)(rnum / DAPLKA_RC_BLKSZ);
j = (int)(rnum % DAPLKA_RC_BLKSZ);
rw_enter(&daplka_resource.daplka_rct_lock, RW_WRITER);
if (i >= daplka_resource.daplka_rc_len) {
rw_exit(&daplka_resource.daplka_rct_lock);
DERR("resource_insert: resource %d not found\n", rnum);
return (-1);
}
blk = daplka_resource.daplka_rc_root[i];
if (blk != NULL) {
ASSERT(i < daplka_resource.daplka_rc_len);
ASSERT(i < daplka_resource.daplka_rc_sz);
if ((intptr_t)blk->daplka_rcblk_blks[j] == DAPLKA_RC_RESERVED) {
blk->daplka_rcblk_blks[j] = rp;
error = 0;
} else {
DERR("resource_insert: %d not reserved, blk = %p\n",
rnum, blk->daplka_rcblk_blks[j]);
}
} else {
DERR("resource_insert: resource %d not found\n", rnum);
}
rw_exit(&daplka_resource.daplka_rct_lock);
return (error);
}
/*
* finds resource using minor device number
*/
static daplka_resource_t *
daplka_resource_lookup(minor_t rnum)
{
int i, j;
daplka_resource_blk_t *blk;
daplka_resource_t *rp;
/*
* Find resource and lock it in READER mode
* search for available resource slot
*/
i = (int)(rnum / DAPLKA_RC_BLKSZ);
j = (int)(rnum % DAPLKA_RC_BLKSZ);
rw_enter(&daplka_resource.daplka_rct_lock, RW_READER);
if (i >= daplka_resource.daplka_rc_len) {
rw_exit(&daplka_resource.daplka_rct_lock);
DERR("resource_lookup: resource %d not found\n", rnum);
return (NULL);
}
blk = daplka_resource.daplka_rc_root[i];
if (blk != NULL) {
ASSERT(i < daplka_resource.daplka_rc_len);
ASSERT(i < daplka_resource.daplka_rc_sz);
rp = blk->daplka_rcblk_blks[j];
if (rp == NULL || (intptr_t)rp == DAPLKA_RC_RESERVED) {
D3("resource_lookup: %d not found, blk = %p\n",
rnum, blk->daplka_rcblk_blks[j]);
} else {
DAPLKA_RS_REF((daplka_ia_resource_t *)rp);
}
} else {
DERR("resource_lookup: resource %d not found\n", rnum);
rp = NULL;
}
rw_exit(&daplka_resource.daplka_rct_lock);
return (rp);
}
/*
* generic hash table implementation
*/
/*
* daplka_hash_create:
* initializes a hash table with the specified parameters
*
* input:
* htblp pointer to hash table
*
* nbuckets number of buckets (must be power of 2)
*
* free_func this function is called on each hash
* table element when daplka_hash_destroy
* is called
*
* lookup_func if daplka_hash_lookup is able to find
* the desired object, this function is
* applied on the object before
* daplka_hash_lookup returns
* output:
* none
*
* return value(s):
* EINVAL nbuckets is not a power of 2
* ENOMEM cannot allocate buckets
* 0 success
*/
static int
daplka_hash_create(daplka_hash_table_t *htblp, uint_t nbuckets,
void (*free_func)(void *), void (*lookup_func)(void *))
{
int i;
if ((nbuckets & ~(nbuckets - 1)) != nbuckets) {
DERR("hash_create: nbuckets not power of 2\n");
return (EINVAL);
}
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*htblp))
htblp->ht_buckets =
kmem_zalloc(sizeof (daplka_hash_bucket_t) * nbuckets,
daplka_km_flags);
if (htblp->ht_buckets == NULL) {
DERR("hash_create: cannot allocate buckets\n");
return (ENOMEM);
}
for (i = 0; i < nbuckets; i++) {
_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(htblp->ht_buckets[i]))
htblp->ht_buckets[i].hb_count = 0;
htblp->ht_buckets[i].hb_entries = NULL;
_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(htblp->ht_buckets[i]))
}
rw_init(&htblp->ht_table_lock, NULL, RW_DRIVER, NULL);
mutex_init(&htblp->ht_key_lock, NULL, MUTEX_DRIVER, NULL);
htblp->ht_count = 0;
htblp->ht_next_hkey = (uint64_t)gethrtime();
htblp->ht_nbuckets = nbuckets;
htblp->ht_free_func = free_func;
htblp->ht_lookup_func = lookup_func;
htblp->ht_initialized = B_TRUE;
D3("hash_create: done, buckets = %d\n", nbuckets);
_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*htblp))
return (0);
}
/*
* daplka_hash_insert:
* inserts an object into a hash table
*
* input:
* htblp pointer to hash table
*
* hkeyp pointer to hash key.
* *hkeyp being non-zero means that the caller
* has generated its own hkey. if *hkeyp is zero,
* this function will generate an hkey for the
* caller. it is recommended that the caller
* leave the hkey generation to this function
* because the hkey is more likely to be evenly
* distributed.
*
* objp pointer to object to be inserted into
* hash table
*
* output:
* hkeyp the generated hkey is returned via this pointer
*
* return value(s):
* EINVAL invalid parameter
* ENOMEM cannot allocate hash entry
* 0 successful
*/
static int
daplka_hash_insert(daplka_hash_table_t *htblp, uint64_t *hkeyp, void *objp)
{
daplka_hash_entry_t *hep, *curr_hep;
daplka_hash_bucket_t *hbp;
uint32_t bucket;
uint64_t hkey;
if (hkeyp == NULL) {
DERR("hash_insert: hkeyp == NULL\n");
return (EINVAL);
}
hep = kmem_zalloc(sizeof (*hep), daplka_km_flags);
if (hep == NULL) {
DERR("hash_insert: cannot alloc hash_entry\n");
return (ENOMEM);
}
if (*hkeyp == 0) {
/* generate a new key */
mutex_enter(&htblp->ht_key_lock);
hkey = ++htblp->ht_next_hkey;
if (hkey == 0) {
hkey = htblp->ht_next_hkey = (uint64_t)gethrtime();
}
mutex_exit(&htblp->ht_key_lock);
} else {
/* use user generated key */
hkey = *hkeyp;
}
/* only works if ht_nbuckets is a power of 2 */
bucket = (uint32_t)(hkey & (htblp->ht_nbuckets - 1));
ASSERT(objp != NULL);
ASSERT(bucket < htblp->ht_nbuckets);
rw_enter(&htblp->ht_table_lock, RW_WRITER);
hep->he_hkey = hkey;
hep->he_objp = objp;
/* look for duplicate entries */
hbp = &htblp->ht_buckets[bucket];
curr_hep = hbp->hb_entries;
while (curr_hep != NULL) {
if (curr_hep->he_hkey == hep->he_hkey) {
break;
}
curr_hep = curr_hep->he_next;
}
if (curr_hep != NULL) {
DERR("hash_insert: found duplicate hash entry: "
"bucket %d, hkey 0x%016llx\n",
bucket, (longlong_t)hep->he_hkey);
kmem_free(hep, sizeof (*hep));
rw_exit(&htblp->ht_table_lock);
return (EINVAL);
}
hep->he_next = hbp->hb_entries;
hbp->hb_entries = hep;
hbp->hb_count++;
htblp->ht_count++;
rw_exit(&htblp->ht_table_lock);
if (*hkeyp == 0) {
*hkeyp = hkey;
ASSERT(*hkeyp != 0);
}
D3("hash_insert: htblp 0x%p, hkey = 0x%016llx, bucket = %d\n",
htblp, (longlong_t)*hkeyp, bucket);
return (0);
}
/*
* daplka_hash_remove:
* removes object identified by hkey from hash table
*
* input:
* htblp pointer to hash table
*
* hkey hkey that identifies the object to be removed
*
* output:
* objpp pointer to pointer to object.
* if remove is successful, the removed object
* will be returned via *objpp.
*
* return value(s):
* EINVAL cannot find hash entry
* 0 successful
*/
static int
daplka_hash_remove(daplka_hash_table_t *htblp, uint64_t hkey, void **objpp)
{
daplka_hash_entry_t *free_hep, **curr_hepp;
daplka_hash_bucket_t *hbp;
uint32_t bucket;
bucket = (uint32_t)(hkey & (htblp->ht_nbuckets - 1));
rw_enter(&htblp->ht_table_lock, RW_WRITER);
hbp = &htblp->ht_buckets[bucket];
curr_hepp = &hbp->hb_entries;
while (*curr_hepp != NULL) {
if ((*curr_hepp)->he_hkey == hkey) {
break;
}
curr_hepp = &(*curr_hepp)->he_next;
}
if (*curr_hepp == NULL) {
DERR("hash_remove: cannot find hash entry: "
"bucket %d, hkey 0x%016llx\n", bucket, (longlong_t)hkey);
rw_exit(&htblp->ht_table_lock);
return (EINVAL);
} else {
if (objpp != NULL) {
*objpp = (*curr_hepp)->he_objp;
}
free_hep = *curr_hepp;
*curr_hepp = (*curr_hepp)->he_next;
kmem_free(free_hep, sizeof (*free_hep));
}
hbp->hb_count--;
htblp->ht_count--;
D3("hash_remove: removed entry, hkey 0x%016llx, bucket %d, "
"hb_count %d, hb_count %d\n",
(longlong_t)hkey, bucket, hbp->hb_count, htblp->ht_count);
rw_exit(&htblp->ht_table_lock);
return (0);
}
/*
* daplka_hash_walk:
* walks through the entire hash table. applying func on each of
* the inserted objects. stops walking if func returns non-zero.
*
* input:
* htblp pointer to hash table
*
* func function to be applied on each object
*
* farg second argument to func
*
* lockmode can be RW_WRITER or RW_READER. this
* allows the caller to choose what type
* of lock to acquire before walking the
* table.
*
* output:
* none
*
* return value(s):
* none
*/
static void
daplka_hash_walk(daplka_hash_table_t *htblp, int (*func)(void *, void *),
void *farg, krw_t lockmode)
{
daplka_hash_entry_t *curr_hep;
daplka_hash_bucket_t *hbp;
uint32_t bucket, retval = 0;
ASSERT(lockmode == RW_WRITER || lockmode == RW_READER);
/* needed for warlock */
if (lockmode == RW_WRITER) {
rw_enter(&htblp->ht_table_lock, RW_WRITER);
} else {
rw_enter(&htblp->ht_table_lock, RW_READER);
}
for (bucket = 0; bucket < htblp->ht_nbuckets && retval == 0; bucket++) {
hbp = &htblp->ht_buckets[bucket];
curr_hep = hbp->hb_entries;
while (curr_hep != NULL) {
retval = (*func)(curr_hep->he_objp, farg);
if (retval != 0) {
break;
}
curr_hep = curr_hep->he_next;
}
}
rw_exit(&htblp->ht_table_lock);
}
/*
* daplka_hash_lookup:
* finds object from hkey
*
* input:
* htblp pointer to hash table
*
* hkey hkey that identifies the object to be looked up
*
* output:
* none
*
* return value(s):
* NULL if not found
* object pointer if found
*/
static void *
daplka_hash_lookup(daplka_hash_table_t *htblp, uint64_t hkey)
{
daplka_hash_entry_t *curr_hep;
uint32_t bucket;
void *objp;
bucket = (uint32_t)(hkey & (htblp->ht_nbuckets - 1));
rw_enter(&htblp->ht_table_lock, RW_READER);
curr_hep = htblp->ht_buckets[bucket].hb_entries;
while (curr_hep != NULL) {
if (curr_hep->he_hkey == hkey) {
break;
}
curr_hep = curr_hep->he_next;
}
if (curr_hep == NULL) {
DERR("hash_lookup: cannot find hash entry: "
"bucket %d, hkey 0x%016llx\n", bucket, (longlong_t)hkey);
rw_exit(&htblp->ht_table_lock);
return (NULL);
}
objp = curr_hep->he_objp;
ASSERT(objp != NULL);
if (htblp->ht_lookup_func != NULL) {
(*htblp->ht_lookup_func)(objp);
}
rw_exit(&htblp->ht_table_lock);
return (objp);
}
/*
* daplka_hash_destroy:
* destroys hash table. applies free_func on all inserted objects.
*
* input:
* htblp pointer to hash table
*
* output:
* none
*
* return value(s):
* none
*/
static void
daplka_hash_destroy(daplka_hash_table_t *htblp)
{
daplka_hash_entry_t *curr_hep, *free_hep;
daplka_hash_entry_t *free_list = NULL;
daplka_hash_bucket_t *hbp;
uint32_t bucket, cnt, total = 0;
if (!htblp->ht_initialized) {
DERR("hash_destroy: not initialized\n");
return;
}
/* free all elements from hash table */
rw_enter(&htblp->ht_table_lock, RW_WRITER);
for (bucket = 0; bucket < htblp->ht_nbuckets; bucket++) {
hbp = &htblp->ht_buckets[bucket];
/* build list of elements to be freed */
curr_hep = hbp->hb_entries;
cnt = 0;
while (curr_hep != NULL) {
cnt++;
free_hep = curr_hep;
curr_hep = curr_hep->he_next;
free_hep->he_next = free_list;
free_list = free_hep;
}
ASSERT(cnt == hbp->hb_count);
total += cnt;
hbp->hb_count = 0;
hbp->hb_entries = NULL;
}
ASSERT(total == htblp->ht_count);
D3("hash_destroy: htblp 0x%p, nbuckets %d, freed %d hash entries\n",
htblp, htblp->ht_nbuckets, total);
rw_exit(&htblp->ht_table_lock);
/* free all objects, now without holding the hash table lock */
cnt = 0;
while (free_list != NULL) {
cnt++;
free_hep = free_list;
free_list = free_list->he_next;
if (htblp->ht_free_func != NULL) {
(*htblp->ht_free_func)(free_hep->he_objp);
}
kmem_free(free_hep, sizeof (*free_hep));
}
ASSERT(total == cnt);
/* free hash buckets and destroy locks */
kmem_free(htblp->ht_buckets,
sizeof (daplka_hash_bucket_t) * htblp->ht_nbuckets);
rw_enter(&htblp->ht_table_lock, RW_WRITER);
htblp->ht_buckets = NULL;
htblp->ht_count = 0;
htblp->ht_nbuckets = 0;
htblp->ht_free_func = NULL;
htblp->ht_lookup_func = NULL;
htblp->ht_initialized = B_FALSE;
rw_exit(&htblp->ht_table_lock);
mutex_destroy(&htblp->ht_key_lock);
rw_destroy(&htblp->ht_table_lock);
}
/*
* daplka_hash_getsize:
* return the number of objects in hash table
*
* input:
* htblp pointer to hash table
*
* output:
* none
*
* return value(s):
* number of objects in hash table
*/
static uint32_t
daplka_hash_getsize(daplka_hash_table_t *htblp)
{
uint32_t sz;
rw_enter(&htblp->ht_table_lock, RW_READER);
sz = htblp->ht_count;
rw_exit(&htblp->ht_table_lock);
return (sz);
}
/*
* this function is used as ht_lookup_func above when lookup is called.
* other types of objs may use a more elaborate lookup_func.
*/
static void
daplka_hash_generic_lookup(void *obj)
{
daplka_resource_t *rp = (daplka_resource_t *)obj;
mutex_enter(&rp->rs_reflock);
rp->rs_refcnt++;
ASSERT(rp->rs_refcnt != 0);
mutex_exit(&rp->rs_reflock);
}
/*
* Generates a non-zero 32 bit hash key used for the timer hash table.
*/
static uint32_t
daplka_timer_hkey_gen()
{
uint32_t new_hkey;
do {
new_hkey = atomic_inc_32_nv(&daplka_timer_hkey);
} while (new_hkey == 0);
return (new_hkey);
}
/*
* The DAPL KA debug logging routines
*/
/*
* Add the string str to the end of the debug log, followed by a newline.
*/
static void
daplka_dbglog(char *str)
{
size_t length;
size_t remlen;
/*
* If this is the first time we've written to the log, initialize it.
*/
if (!daplka_dbginit) {
return;
}
mutex_enter(&daplka_dbglock);
/*
* Note the log is circular; if this string would run over the end,
* we copy the first piece to the end and then the last piece to
* the beginning of the log.
*/
length = strlen(str);
remlen = (size_t)sizeof (daplka_dbgbuf) - daplka_dbgnext - 1;
if (length > remlen) {
if (remlen)
bcopy(str, daplka_dbgbuf + daplka_dbgnext, remlen);
daplka_dbgbuf[sizeof (daplka_dbgbuf) - 1] = (char)NULL;
str += remlen;
length -= remlen;
daplka_dbgnext = 0;
}
bcopy(str, daplka_dbgbuf + daplka_dbgnext, length);
daplka_dbgnext += length;
if (daplka_dbgnext >= sizeof (daplka_dbgbuf))
daplka_dbgnext = 0;
mutex_exit(&daplka_dbglock);
}
/*
* Add a printf-style message to whichever debug logs we're currently using.
*/
static void
daplka_debug(const char *fmt, ...)
{
char buff[512];
va_list ap;
/*
* The system prepends the thread id and high resolution time
* (nanoseconds are dropped and so are the upper digits)
* to the specified string.
* The unit for timestamp is 10 microseconds.
* It wraps around every 10000 seconds.
* Ex: gethrtime() = X ns = X/1000 us = X/10000 10 micro sec.
*/
int micro_time = (int)((gethrtime() / 10000) % 1000000000);
(void) sprintf(buff, "th %p tm %9d: ", (void *)curthread, micro_time);
va_start(ap, fmt);
(void) vsprintf(buff+strlen(buff), fmt, ap);
va_end(ap);
daplka_dbglog(buff);
}
static void
daplka_console(const char *fmt, ...)
{
char buff[512];
va_list ap;
va_start(ap, fmt);
(void) vsprintf(buff, fmt, ap);
va_end(ap);
cmn_err(CE_CONT, "%s", buff);
}