clients/rds/rdsib.c

	rdsib.c revision 276df1e91366009d02eabe9e2c9a6f0b9dab2bba
/*
 * 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.
 */


#include <sys/types.h>
#include <sys/stat.h>
#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/modctl.h>
#include <inet/ip.h>
#include <sys/ib/clients/rds/rdsib_ib.h>
#include <sys/ib/clients/rds/rdsib_buf.h>
#include <sys/ib/clients/rds/rdsib_cm.h>
#include <sys/ib/clients/rds/rdsib_protocol.h>
#include <sys/ib/clients/rds/rds_transport.h>
#include <sys/ib/clients/rds/rds_kstat.h>

/*
 * Global Configuration Variables
 * As defined in RDS proposal
 */
uint_t      MaxNodes        = RDS_MAX_NODES;
uint_t      RdsPktSize;
uint_t      NDataRX;
uint_t      MaxDataSendBuffers  = RDS_MAX_DATA_SEND_BUFFERS;
uint_t      MaxDataRecvBuffers  = RDS_MAX_DATA_RECV_BUFFERS;
uint_t      MaxCtrlSendBuffers  = RDS_MAX_CTRL_SEND_BUFFERS;
uint_t      MaxCtrlRecvBuffers  = RDS_MAX_CTRL_RECV_BUFFERS;
uint_t      DataRecvBufferLWM   = RDS_DATA_RECV_BUFFER_LWM;
uint_t      CtrlRecvBufferLWM   = RDS_CTRL_RECV_BUFFER_LWM;
uint_t      PendingRxPktsHWM    = RDS_PENDING_RX_PKTS_HWM;
uint_t      MinRnrRetry     = RDS_IB_RNR_RETRY;
uint8_t     IBPathRetryCount    = RDS_IB_PATH_RETRY;
uint8_t     IBPktLifeTime       = RDS_IB_PKT_LT;

extern int rdsib_open_ib();
extern void rdsib_close_ib();
extern void rds_resume_port(in_port_t port);
extern int rds_sendmsg(uio_t *uiop, ipaddr_t sendip, ipaddr_t recvip,
    in_port_t sendport, in_port_t recvport, zoneid_t zoneid);
extern boolean_t rds_if_lookup_by_name(char *devname);

rds_transport_ops_t rds_ib_transport_ops = {
    rdsib_open_ib,
    rdsib_close_ib,
    rds_sendmsg,
    rds_resume_port,
    rds_if_lookup_by_name
};

/* global */
rds_state_t *rdsib_statep = NULL;
krwlock_t   rds_loopback_portmap_lock;
uint8_t     rds_loopback_portmap[RDS_PORT_MAP_SIZE];
ddi_taskq_t *rds_taskq = NULL;
dev_info_t  *rdsib_dev_info = NULL;
uint_t      rds_rx_pkts_pending_hwm;

#ifdef DEBUG
uint32_t    rdsdbglvl = RDS_LOG_L3;
#else
uint32_t    rdsdbglvl = RDS_LOG_L2;
#endif

#define     RDS_NUM_TASKQ_THREADS   4

static int rdsib_attach(dev_info_t *dip, ddi_attach_cmd_t cmd);
static int rdsib_detach(dev_info_t *dip, ddi_detach_cmd_t cmd);
static int rdsib_info(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg,
    void **result);
static void rds_read_config_values(dev_info_t *dip);

/* Driver entry points */
static struct cb_ops    rdsib_cb_ops = {
    nulldev,        /* open */
    nulldev,        /* close */
    nodev,          /* strategy */
    nodev,          /* print */
    nodev,          /* dump */
    nodev,          /* read */
    nodev,          /* write */
    nodev,          /* ioctl */
    nodev,          /* devmap */
    nodev,          /* mmap */
    nodev,          /* segmap */
    nochpoll,       /* poll */
    ddi_prop_op,        /* prop_op */
    NULL,           /* stream */
    D_MP,           /* cb_flag */
    CB_REV,         /* rev */
    nodev,          /* int (*cb_aread)() */
    nodev,          /* int (*cb_awrite)() */
};

/* Device options */
static struct dev_ops rdsib_ops = {
    DEVO_REV,       /* devo_rev, */
    0,          /* refcnt  */
    rdsib_info,     /* info */
    nulldev,        /* identify */
    nulldev,        /* probe */
    rdsib_attach,       /* attach */
    rdsib_detach,       /* detach */
    nodev,          /* reset */
    &rdsib_cb_ops,      /* driver ops - devctl interfaces */
    NULL,           /* bus operations */
    NULL,           /* power */
    ddi_quiesce_not_needed, /* devo_quiesce */
};

/*
 * Module linkage information.
 */
#define RDS_DEVDESC "RDS IB driver"
static struct modldrv rdsib_modldrv = {
    &mod_driverops,     /* Driver module */
    RDS_DEVDESC,        /* Driver name and version */
    &rdsib_ops,     /* Driver ops */
};

static struct modlinkage rdsib_modlinkage = {
    MODREV_1,
    (void *)&rdsib_modldrv,
    NULL
};

/* Called from _init */
int
rdsib_init()
{
    /* RDS supports only one instance */
    rdsib_statep = kmem_zalloc(sizeof (rds_state_t), KM_SLEEP);

    rw_init(&rdsib_statep->rds_sessionlock, NULL, RW_DRIVER, NULL);
    rw_init(&rdsib_statep->rds_hca_lock, NULL, RW_DRIVER, NULL);

    rw_init(&rds_loopback_portmap_lock, NULL, RW_DRIVER, NULL);
    bzero(rds_loopback_portmap, RDS_PORT_MAP_SIZE);

    mutex_init(&rds_dpool.pool_lock, NULL, MUTEX_DRIVER, NULL);
    cv_init(&rds_dpool.pool_cv, NULL, CV_DRIVER, NULL);
    mutex_init(&rds_cpool.pool_lock, NULL, MUTEX_DRIVER, NULL);
    cv_init(&rds_cpool.pool_cv, NULL, CV_DRIVER, NULL);

    /* Initialize logging */
    rds_logging_initialization();

    RDS_SET_NPORT(1); /* this should never be 0 */

    ASSERT(rds_transport_ops == NULL);
    rds_transport_ops = &rds_ib_transport_ops;

    return (0);
}

/* Called from _fini */
void
rdsib_fini()
{
    /* Stop logging */
    rds_logging_destroy();

    cv_destroy(&rds_dpool.pool_cv);
    mutex_destroy(&rds_dpool.pool_lock);
    cv_destroy(&rds_cpool.pool_cv);
    mutex_destroy(&rds_cpool.pool_lock);

    rw_destroy(&rds_loopback_portmap_lock);

    rw_destroy(&rdsib_statep->rds_hca_lock);
    rw_destroy(&rdsib_statep->rds_sessionlock);
    kmem_free(rdsib_statep, sizeof (rds_state_t));

    rds_transport_ops = NULL;
}

int
_init(void)
{
    int ret;

    if (ibt_hw_is_present() == 0) {
        return (ENODEV);
    }

    ret = rdsib_init();
    if (ret != 0) {
        return (ret);
    }

    ret = mod_install(&rdsib_modlinkage);
    if (ret != 0) {
        /*
         * Could not load module
         */
        rdsib_fini();
        return (ret);
    }

    return (0);
}

int
_fini()
{
    int ret;

    /*
     * Remove module
     */
    if ((ret = mod_remove(&rdsib_modlinkage)) != 0) {
        return (ret);
    }

    rdsib_fini();

    return (0);
}

int
_info(struct modinfo *modinfop)
{
    return (mod_info(&rdsib_modlinkage, modinfop));
}

static int
rdsib_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
{
    int ret;

    RDS_DPRINTF2("rdsib_attach", "enter");

    if (cmd != DDI_ATTACH)
        return (DDI_FAILURE);

    if (rdsib_dev_info != NULL) {
        RDS_DPRINTF1("rdsib_attach", "Multiple RDS instances are"
            " not supported (rds_dev_info: 0x%p)", rdsib_dev_info);
        return (DDI_FAILURE);
    }

    rdsib_dev_info = dip;
    rds_read_config_values(dip);

    rds_taskq = ddi_taskq_create(dip, "rds_taskq", RDS_NUM_TASKQ_THREADS,
        TASKQ_DEFAULTPRI, 0);
    if (rds_taskq == NULL) {
        RDS_DPRINTF1("rdsib_attach",
            "ddi_taskq_create failed for rds_taskq");
        rdsib_dev_info = NULL;
        return (DDI_FAILURE);
    }

    ret = ddi_create_minor_node(dip, "rdsib", S_IFCHR, 0, DDI_PSEUDO, 0);
    if (ret != DDI_SUCCESS) {
        RDS_DPRINTF1("rdsib_attach",
            "ddi_create_minor_node failed: %d", ret);
        ddi_taskq_destroy(rds_taskq);
        rds_taskq = NULL;
        rdsib_dev_info = NULL;
        return (DDI_FAILURE);
    }

    /* Max number of receive buffers on the system */
    NDataRX = (MaxNodes - 1) * MaxDataRecvBuffers * 2;

    /*
     * High water mark for the receive buffers in the system. If the
     * number of buffers used crosses this mark then all sockets in
     * would be stalled. The port quota for the sockets is set based
     * on this limit.
     */
    rds_rx_pkts_pending_hwm = (PendingRxPktsHWM * NDataRX)/100;

    ret = rdsib_initialize_ib();
    if (ret != 0) {
        RDS_DPRINTF1("rdsib_attach",
            "rdsib_initialize_ib failed: %d", ret);
        ddi_taskq_destroy(rds_taskq);
        rds_taskq = NULL;
        rdsib_dev_info = NULL;
        return (DDI_FAILURE);
    }

    RDS_DPRINTF2("rdsib_attach", "return");

    return (DDI_SUCCESS);
}

static int
rdsib_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
{
    RDS_DPRINTF2("rdsib_detach", "enter");

    if (cmd != DDI_DETACH)
        return (DDI_FAILURE);

    rdsib_deinitialize_ib();

    ddi_remove_minor_node(dip, "rdsib");

    /* destroy taskq */
    if (rds_taskq != NULL) {
        ddi_taskq_destroy(rds_taskq);
        rds_taskq = NULL;
    }

    rdsib_dev_info = NULL;

    RDS_DPRINTF2("rdsib_detach", "return");

    return (DDI_SUCCESS);
}

/* ARGSUSED */
static int
rdsib_info(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **result)
{
    int ret = DDI_FAILURE;

    switch (cmd) {
    case DDI_INFO_DEVT2DEVINFO:
        if (rdsib_dev_info != NULL) {
            *result = (void *)rdsib_dev_info;
            ret = DDI_SUCCESS;
        }
        break;

    case DDI_INFO_DEVT2INSTANCE:
        *result = NULL;
        ret = DDI_SUCCESS;
        break;

    default:
        break;
    }

    return (ret);
}

static void
rds_read_config_values(dev_info_t *dip)
{
    MaxNodes = ddi_prop_get_int(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS,
        "MaxNodes", RDS_MAX_NODES);

    UserBufferSize = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
        DDI_PROP_DONTPASS, "UserBufferSize", RDS_USER_DATA_BUFFER_SIZE);

    MaxDataSendBuffers = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
        DDI_PROP_DONTPASS, "MaxDataSendBuffers", RDS_MAX_DATA_SEND_BUFFERS);

    MaxDataRecvBuffers = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
        DDI_PROP_DONTPASS, "MaxDataRecvBuffers", RDS_MAX_DATA_RECV_BUFFERS);

    MaxCtrlSendBuffers = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
        DDI_PROP_DONTPASS, "MaxCtrlSendBuffers", RDS_MAX_CTRL_SEND_BUFFERS);

    MaxCtrlRecvBuffers = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
        DDI_PROP_DONTPASS, "MaxCtrlRecvBuffers", RDS_MAX_CTRL_RECV_BUFFERS);

    DataRecvBufferLWM = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
        DDI_PROP_DONTPASS, "DataRecvBufferLWM", RDS_DATA_RECV_BUFFER_LWM);

    CtrlRecvBufferLWM = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
        DDI_PROP_DONTPASS, "CtrlRecvBufferLWM", RDS_CTRL_RECV_BUFFER_LWM);

    PendingRxPktsHWM = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
        DDI_PROP_DONTPASS, "PendingRxPktsHWM", RDS_PENDING_RX_PKTS_HWM);

    MinRnrRetry = ddi_prop_get_int(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS,
        "MinRnrRetry", RDS_IB_RNR_RETRY);

    IBPathRetryCount = (uint8_t)ddi_prop_get_int(DDI_DEV_T_ANY, dip,
        DDI_PROP_DONTPASS, "IBPathRetryCount", RDS_IB_PATH_RETRY);

    IBPktLifeTime = (uint8_t)ddi_prop_get_int(DDI_DEV_T_ANY, dip,
        DDI_PROP_DONTPASS, "IBPktLifeTime", RDS_IB_PKT_LT);

    rdsdbglvl = ddi_prop_get_int(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS,
        "rdsdbglvl", RDS_LOG_L2);

    if (MaxNodes < 2) {
        cmn_err(CE_WARN, "MaxNodes is set to less than 2");
        MaxNodes = 2;
    }
}