dld_proto.c revision c08e5e1a6b0518eb8f644673c26e1d3f22a773b0
/*
* 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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Data-Link Driver
*/
#include <sys/types.h>
#include <sys/debug.h>
#include <sys/sysmacros.h>
#include <sys/stream.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/strsun.h>
#include <sys/cpuvar.h>
#include <sys/dlpi.h>
#include <netinet/in.h>
#include <sys/sdt.h>
#include <sys/strsubr.h>
#include <sys/vlan.h>
#include <sys/mac.h>
#include <sys/dls.h>
#include <sys/dld.h>
#include <sys/dld_impl.h>
#include <sys/dls_soft_ring.h>
typedef boolean_t proto_reqfunc_t(dld_str_t *, union DL_primitives *, mblk_t *);
static proto_reqfunc_t proto_info_req, proto_attach_req, proto_detach_req,
proto_bind_req, proto_unbind_req, proto_promiscon_req, proto_promiscoff_req,
proto_enabmulti_req, proto_disabmulti_req, proto_physaddr_req,
proto_setphysaddr_req, proto_udqos_req, proto_req, proto_capability_req,
proto_notify_req, proto_passive_req;
static void proto_poll_disable(dld_str_t *);
static boolean_t proto_poll_enable(dld_str_t *, dl_capab_dls_t *);
static void proto_soft_ring_disable(dld_str_t *);
static boolean_t proto_soft_ring_enable(dld_str_t *, dl_capab_dls_t *);
static boolean_t proto_capability_advertise(dld_str_t *, mblk_t *);
static void proto_change_soft_ring_fanout(dld_str_t *, int);
#define DL_ACK_PENDING(state) \
((state) == DL_ATTACH_PENDING || \
(state) == DL_DETACH_PENDING || \
(state) == DL_BIND_PENDING || \
(state) == DL_UNBIND_PENDING)
/*
* Process a DLPI protocol message.
* The primitives DL_BIND_REQ, DL_ENABMULTI_REQ, DL_PROMISCON_REQ,
* DL_SET_PHYS_ADDR_REQ put the data link below our dld_str_t into an
* 'active' state. The primitive DL_PASSIVE_REQ marks our dld_str_t
* as 'passive' and forbids it from being subsequently made 'active'
* by the above primitives.
*/
void
dld_wput_proto_nondata(dld_str_t *dsp, mblk_t *mp)
{
union DL_primitives *udlp;
t_uscalar_t prim;
ASSERT(MBLKL(mp) >= sizeof (t_uscalar_t));
udlp = (union DL_primitives *)mp->b_rptr;
prim = udlp->dl_primitive;
switch (prim) {
case DL_INFO_REQ:
(void) proto_info_req(dsp, udlp, mp);
break;
case DL_BIND_REQ:
(void) proto_bind_req(dsp, udlp, mp);
break;
case DL_UNBIND_REQ:
(void) proto_unbind_req(dsp, udlp, mp);
break;
case DL_UDQOS_REQ:
(void) proto_udqos_req(dsp, udlp, mp);
break;
case DL_ATTACH_REQ:
(void) proto_attach_req(dsp, udlp, mp);
break;
case DL_DETACH_REQ:
(void) proto_detach_req(dsp, udlp, mp);
break;
case DL_ENABMULTI_REQ:
(void) proto_enabmulti_req(dsp, udlp, mp);
break;
case DL_DISABMULTI_REQ:
(void) proto_disabmulti_req(dsp, udlp, mp);
break;
case DL_PROMISCON_REQ:
(void) proto_promiscon_req(dsp, udlp, mp);
break;
case DL_PROMISCOFF_REQ:
(void) proto_promiscoff_req(dsp, udlp, mp);
break;
case DL_PHYS_ADDR_REQ:
(void) proto_physaddr_req(dsp, udlp, mp);
break;
case DL_SET_PHYS_ADDR_REQ:
(void) proto_setphysaddr_req(dsp, udlp, mp);
break;
case DL_NOTIFY_REQ:
(void) proto_notify_req(dsp, udlp, mp);
break;
case DL_CAPABILITY_REQ:
(void) proto_capability_req(dsp, udlp, mp);
break;
case DL_PASSIVE_REQ:
(void) proto_passive_req(dsp, udlp, mp);
break;
default:
(void) proto_req(dsp, udlp, mp);
break;
}
}
#define NEG(x) -(x)
typedef struct dl_info_ack_wrapper {
dl_info_ack_t dl_info;
uint8_t dl_addr[MAXMACADDRLEN + sizeof (uint16_t)];
uint8_t dl_brdcst_addr[MAXMACADDRLEN];
dl_qos_cl_range1_t dl_qos_range1;
dl_qos_cl_sel1_t dl_qos_sel1;
} dl_info_ack_wrapper_t;
/*
* DL_INFO_REQ
*/
/*ARGSUSED*/
static boolean_t
proto_info_req(dld_str_t *dsp, union DL_primitives *udlp, mblk_t *mp)
{
dl_info_ack_wrapper_t *dlwp;
dl_info_ack_t *dlp;
dl_qos_cl_sel1_t *selp;
dl_qos_cl_range1_t *rangep;
uint8_t *addr;
uint8_t *brdcst_addr;
uint_t addr_length;
uint_t sap_length;
mac_info_t minfo;
mac_info_t *minfop;
queue_t *q = dsp->ds_wq;
/*
* Swap the request message for one large enough to contain the
* wrapper structure defined above.
*/
if ((mp = mexchange(q, mp, sizeof (dl_info_ack_wrapper_t),
M_PCPROTO, 0)) == NULL)
return (B_FALSE);
rw_enter(&dsp->ds_lock, RW_READER);
bzero(mp->b_rptr, sizeof (dl_info_ack_wrapper_t));
dlwp = (dl_info_ack_wrapper_t *)mp->b_rptr;
dlp = &(dlwp->dl_info);
ASSERT(dlp == (dl_info_ack_t *)mp->b_rptr);
dlp->dl_primitive = DL_INFO_ACK;
/*
* Set up the sub-structure pointers.
*/
addr = dlwp->dl_addr;
brdcst_addr = dlwp->dl_brdcst_addr;
rangep = &(dlwp->dl_qos_range1);
selp = &(dlwp->dl_qos_sel1);
/*
* This driver supports only version 2 connectionless DLPI provider
* nodes.
*/
dlp->dl_service_mode = DL_CLDLS;
dlp->dl_version = DL_VERSION_2;
/*
* Set the style of the provider
*/
dlp->dl_provider_style = dsp->ds_style;
ASSERT(dlp->dl_provider_style == DL_STYLE1 ||
dlp->dl_provider_style == DL_STYLE2);
/*
* Set the current DLPI state.
*/
dlp->dl_current_state = dsp->ds_dlstate;
/*
* Gratuitously set the media type. This is to deal with modules
* that assume the media type is known prior to DL_ATTACH_REQ
* being completed.
*/
dlp->dl_mac_type = DL_ETHER;
/*
* If the stream is not at least attached we try to retrieve the
* mac_info using mac_info_get()
*/
if (dsp->ds_dlstate == DL_UNATTACHED ||
dsp->ds_dlstate == DL_ATTACH_PENDING ||
dsp->ds_dlstate == DL_DETACH_PENDING) {
if (!mac_info_get(ddi_major_to_name(dsp->ds_major), &minfo)) {
/*
* Cannot find mac_info. giving up.
*/
goto done;
}
minfop = &minfo;
} else {
minfop = (mac_info_t *)dsp->ds_mip;
/* We can only get the sdu if we're attached. */
mac_sdu_get(dsp->ds_mh, &dlp->dl_min_sdu, &dlp->dl_max_sdu);
}
/*
* Set the media type (properly this time).
*/
if (dsp->ds_native)
dlp->dl_mac_type = minfop->mi_nativemedia;
else
dlp->dl_mac_type = minfop->mi_media;
/*
* Set the DLSAP length. We only support 16 bit values and they
* appear after the MAC address portion of DLSAP addresses.
*/
sap_length = sizeof (uint16_t);
dlp->dl_sap_length = NEG(sap_length);
addr_length = minfop->mi_addr_length;
/*
* Copy in the media broadcast address.
*/
if (minfop->mi_brdcst_addr != NULL) {
dlp->dl_brdcst_addr_offset =
(uintptr_t)brdcst_addr - (uintptr_t)dlp;
bcopy(minfop->mi_brdcst_addr, brdcst_addr, addr_length);
dlp->dl_brdcst_addr_length = addr_length;
}
dlp->dl_qos_range_offset = (uintptr_t)rangep - (uintptr_t)dlp;
dlp->dl_qos_range_length = sizeof (dl_qos_cl_range1_t);
rangep->dl_qos_type = DL_QOS_CL_RANGE1;
rangep->dl_trans_delay.dl_target_value = DL_UNKNOWN;
rangep->dl_trans_delay.dl_accept_value = DL_UNKNOWN;
rangep->dl_protection.dl_min = DL_UNKNOWN;
rangep->dl_protection.dl_max = DL_UNKNOWN;
rangep->dl_residual_error = DL_UNKNOWN;
/*
* Specify the supported range of priorities.
*/
rangep->dl_priority.dl_min = 0;
rangep->dl_priority.dl_max = (1 << VLAN_PRI_SIZE) - 1;
dlp->dl_qos_offset = (uintptr_t)selp - (uintptr_t)dlp;
dlp->dl_qos_length = sizeof (dl_qos_cl_sel1_t);
selp->dl_qos_type = DL_QOS_CL_SEL1;
selp->dl_trans_delay = DL_UNKNOWN;
selp->dl_protection = DL_UNKNOWN;
selp->dl_residual_error = DL_UNKNOWN;
/*
* Specify the current priority (which can be changed by
* the DL_UDQOS_REQ primitive).
*/
selp->dl_priority = dsp->ds_pri;
dlp->dl_addr_length = addr_length + sizeof (uint16_t);
if (dsp->ds_dlstate == DL_IDLE) {
/*
* The stream is bound. Therefore we can formulate a valid
* DLSAP address.
*/
dlp->dl_addr_offset = (uintptr_t)addr - (uintptr_t)dlp;
if (addr_length > 0)
bcopy(dsp->ds_curr_addr, addr, addr_length);
*(uint16_t *)(addr + addr_length) = dsp->ds_sap;
}
done:
ASSERT(IMPLY(dlp->dl_qos_offset != 0, dlp->dl_qos_length != 0));
ASSERT(IMPLY(dlp->dl_qos_range_offset != 0,
dlp->dl_qos_range_length != 0));
ASSERT(IMPLY(dlp->dl_addr_offset != 0, dlp->dl_addr_length != 0));
ASSERT(IMPLY(dlp->dl_brdcst_addr_offset != 0,
dlp->dl_brdcst_addr_length != 0));
rw_exit(&dsp->ds_lock);
qreply(q, mp);
return (B_TRUE);
}
/*
* DL_ATTACH_REQ
*/
static boolean_t
proto_attach_req(dld_str_t *dsp, union DL_primitives *udlp, mblk_t *mp)
{
dl_attach_req_t *dlp = (dl_attach_req_t *)udlp;
int err = 0;
t_uscalar_t dl_err;
queue_t *q = dsp->ds_wq;
rw_enter(&dsp->ds_lock, RW_WRITER);
if (MBLKL(mp) < sizeof (dl_attach_req_t) ||
dlp->dl_ppa < 0 || dsp->ds_style == DL_STYLE1) {
dl_err = DL_BADPRIM;
goto failed;
}
if (dsp->ds_dlstate != DL_UNATTACHED) {
dl_err = DL_OUTSTATE;
goto failed;
}
dsp->ds_dlstate = DL_ATTACH_PENDING;
err = dld_str_attach(dsp, dlp->dl_ppa);
if (err != 0) {
switch (err) {
case ENOENT:
dl_err = DL_BADPPA;
err = 0;
break;
default:
dl_err = DL_SYSERR;
break;
}
dsp->ds_dlstate = DL_UNATTACHED;
goto failed;
}
ASSERT(dsp->ds_dlstate == DL_UNBOUND);
rw_exit(&dsp->ds_lock);
dlokack(q, mp, DL_ATTACH_REQ);
return (B_TRUE);
failed:
rw_exit(&dsp->ds_lock);
dlerrorack(q, mp, DL_ATTACH_REQ, dl_err, (t_uscalar_t)err);
return (B_FALSE);
}
/*ARGSUSED*/
static boolean_t
proto_detach_req(dld_str_t *dsp, union DL_primitives *udlp, mblk_t *mp)
{
queue_t *q = dsp->ds_wq;
t_uscalar_t dl_err;
rw_enter(&dsp->ds_lock, RW_WRITER);
if (MBLKL(mp) < sizeof (dl_detach_req_t)) {
dl_err = DL_BADPRIM;
goto failed;
}
if (dsp->ds_dlstate != DL_UNBOUND) {
dl_err = DL_OUTSTATE;
goto failed;
}
if (dsp->ds_style == DL_STYLE1) {
dl_err = DL_BADPRIM;
goto failed;
}
dsp->ds_dlstate = DL_DETACH_PENDING;
dld_str_detach(dsp);
rw_exit(&dsp->ds_lock);
dlokack(dsp->ds_wq, mp, DL_DETACH_REQ);
return (B_TRUE);
failed:
rw_exit(&dsp->ds_lock);
dlerrorack(q, mp, DL_DETACH_REQ, dl_err, 0);
return (B_FALSE);
}
/*
* DL_BIND_REQ
*/
static boolean_t
proto_bind_req(dld_str_t *dsp, union DL_primitives *udlp, mblk_t *mp)
{
dl_bind_req_t *dlp = (dl_bind_req_t *)udlp;
int err = 0;
uint8_t dlsap_addr[MAXMACADDRLEN + sizeof (uint16_t)];
uint_t dlsap_addr_length;
t_uscalar_t dl_err;
t_scalar_t sap;
queue_t *q = dsp->ds_wq;
/*
* Because control message processing is serialized, we don't need
* to hold any locks to read any fields of dsp; we only need ds_lock
* to update the ds_dlstate, ds_sap and ds_passivestate fields.
*/
if (MBLKL(mp) < sizeof (dl_bind_req_t)) {
dl_err = DL_BADPRIM;
goto failed;
}
if (dlp->dl_xidtest_flg != 0) {
dl_err = DL_NOAUTO;
goto failed;
}
if (dlp->dl_service_mode != DL_CLDLS) {
dl_err = DL_UNSUPPORTED;
goto failed;
}
if (dsp->ds_dlstate != DL_UNBOUND) {
dl_err = DL_OUTSTATE;
goto failed;
}
if (dsp->ds_passivestate == DLD_UNINITIALIZED &&
!dls_active_set(dsp->ds_dc)) {
dl_err = DL_SYSERR;
err = EBUSY;
goto failed;
}
/*
* Set the receive callback.
*/
dls_rx_set(dsp->ds_dc, (dsp->ds_mode == DLD_RAW) ?
dld_str_rx_raw : dld_str_rx_unitdata, dsp);
/*
* Bind the channel such that it can receive packets.
*/
sap = dlp->dl_sap;
err = dls_bind(dsp->ds_dc, sap);
if (err != 0) {
switch (err) {
case EINVAL:
dl_err = DL_BADADDR;
err = 0;
break;
default:
dl_err = DL_SYSERR;
break;
}
if (dsp->ds_passivestate == DLD_UNINITIALIZED)
dls_active_clear(dsp->ds_dc);
goto failed;
}
/*
* Copy in MAC address.
*/
dlsap_addr_length = dsp->ds_mip->mi_addr_length;
bcopy(dsp->ds_curr_addr, dlsap_addr, dlsap_addr_length);
/*
* Copy in the SAP.
*/
*(uint16_t *)(dlsap_addr + dlsap_addr_length) = sap;
dlsap_addr_length += sizeof (uint16_t);
rw_enter(&dsp->ds_lock, RW_WRITER);
dsp->ds_dlstate = DL_IDLE;
if (dsp->ds_passivestate == DLD_UNINITIALIZED)
dsp->ds_passivestate = DLD_ACTIVE;
dsp->ds_sap = sap;
if (dsp->ds_mode == DLD_FASTPATH)
dsp->ds_tx = str_mdata_fastpath_put;
else if (dsp->ds_mode == DLD_RAW)
dsp->ds_tx = str_mdata_raw_put;
dsp->ds_unitdata_tx = dld_wput_proto_data;
rw_exit(&dsp->ds_lock);
dlbindack(q, mp, sap, dlsap_addr, dlsap_addr_length, 0, 0);
return (B_TRUE);
failed:
dlerrorack(q, mp, DL_BIND_REQ, dl_err, (t_uscalar_t)err);
return (B_FALSE);
}
/*
* DL_UNBIND_REQ
*/
/*ARGSUSED*/
static boolean_t
proto_unbind_req(dld_str_t *dsp, union DL_primitives *udlp, mblk_t *mp)
{
queue_t *q = dsp->ds_wq;
t_uscalar_t dl_err;
if (MBLKL(mp) < sizeof (dl_unbind_req_t)) {
dl_err = DL_BADPRIM;
goto failed;
}
if (dsp->ds_dlstate != DL_IDLE) {
dl_err = DL_OUTSTATE;
goto failed;
}
/*
* Flush any remaining packets scheduled for transmission.
*/
dld_tx_flush(dsp);
/*
* Unbind the channel to stop packets being received.
*/
dls_unbind(dsp->ds_dc);
/*
* Clear the receive callback.
*/
dls_rx_set(dsp->ds_dc, NULL, NULL);
rw_enter(&dsp->ds_lock, RW_WRITER);
/*
* Disable polling mode, if it is enabled.
*/
proto_poll_disable(dsp);
/*
* If soft rings were enabled, the workers should be quiesced.
*/
dls_soft_ring_disable(dsp->ds_dc);
/*
* Clear LSO flags.
*/
dsp->ds_lso = B_FALSE;
dsp->ds_lso_max = 0;
/*
* Set the mode back to the default (unitdata).
*/
dsp->ds_mode = DLD_UNITDATA;
dsp->ds_dlstate = DL_UNBOUND;
DLD_TX_QUIESCE(dsp);
rw_exit(&dsp->ds_lock);
dlokack(q, mp, DL_UNBIND_REQ);
return (B_TRUE);
failed:
dlerrorack(q, mp, DL_UNBIND_REQ, dl_err, 0);
return (B_FALSE);
}
/*
* DL_PROMISCON_REQ
*/
static boolean_t
proto_promiscon_req(dld_str_t *dsp, union DL_primitives *udlp, mblk_t *mp)
{
dl_promiscon_req_t *dlp = (dl_promiscon_req_t *)udlp;
int err = 0;
t_uscalar_t dl_err;
uint32_t promisc;
queue_t *q = dsp->ds_wq;
/*
* Because control message processing is serialized, we don't need
* to hold any locks to read any fields of dsp; we only need ds_lock
* to update the ds_promisc and ds_passivestate fields.
*/
if (MBLKL(mp) < sizeof (dl_promiscon_req_t)) {
dl_err = DL_BADPRIM;
goto failed;
}
if (dsp->ds_dlstate == DL_UNATTACHED ||
DL_ACK_PENDING(dsp->ds_dlstate)) {
dl_err = DL_OUTSTATE;
goto failed;
}
switch (dlp->dl_level) {
case DL_PROMISC_SAP:
promisc = DLS_PROMISC_SAP;
break;
case DL_PROMISC_MULTI:
promisc = DLS_PROMISC_MULTI;
break;
case DL_PROMISC_PHYS:
promisc = DLS_PROMISC_PHYS;
break;
default:
dl_err = DL_NOTSUPPORTED;
goto failed;
}
if (dsp->ds_passivestate == DLD_UNINITIALIZED &&
!dls_active_set(dsp->ds_dc)) {
dl_err = DL_SYSERR;
err = EBUSY;
goto failed;
}
/*
* Adjust channel promiscuity.
*/
promisc = (dsp->ds_promisc | promisc);
err = dls_promisc(dsp->ds_dc, promisc);
if (err != 0) {
dl_err = DL_SYSERR;
if (dsp->ds_passivestate == DLD_UNINITIALIZED)
dls_active_clear(dsp->ds_dc);
goto failed;
}
rw_enter(&dsp->ds_lock, RW_WRITER);
if (dsp->ds_passivestate == DLD_UNINITIALIZED)
dsp->ds_passivestate = DLD_ACTIVE;
dsp->ds_promisc = promisc;
rw_exit(&dsp->ds_lock);
dlokack(q, mp, DL_PROMISCON_REQ);
return (B_TRUE);
failed:
dlerrorack(q, mp, DL_PROMISCON_REQ, dl_err, (t_uscalar_t)err);
return (B_FALSE);
}
/*
* DL_PROMISCOFF_REQ
*/
static boolean_t
proto_promiscoff_req(dld_str_t *dsp, union DL_primitives *udlp, mblk_t *mp)
{
dl_promiscoff_req_t *dlp = (dl_promiscoff_req_t *)udlp;
int err = 0;
t_uscalar_t dl_err;
uint32_t promisc;
queue_t *q = dsp->ds_wq;
/*
* Because control messages processing is serialized, we don't need
* to hold any lock to read any field of dsp; we hold ds_lock to
* update the ds_promisc field.
*/
if (MBLKL(mp) < sizeof (dl_promiscoff_req_t)) {
dl_err = DL_BADPRIM;
goto failed;
}
if (dsp->ds_dlstate == DL_UNATTACHED ||
DL_ACK_PENDING(dsp->ds_dlstate)) {
dl_err = DL_OUTSTATE;
goto failed;
}
switch (dlp->dl_level) {
case DL_PROMISC_SAP:
promisc = DLS_PROMISC_SAP;
break;
case DL_PROMISC_MULTI:
promisc = DLS_PROMISC_MULTI;
break;
case DL_PROMISC_PHYS:
promisc = DLS_PROMISC_PHYS;
break;
default:
dl_err = DL_NOTSUPPORTED;
goto failed;
}
if (!(dsp->ds_promisc & promisc)) {
dl_err = DL_NOTENAB;
goto failed;
}
promisc = (dsp->ds_promisc & ~promisc);
err = dls_promisc(dsp->ds_dc, promisc);
if (err != 0) {
dl_err = DL_SYSERR;
goto failed;
}
rw_enter(&dsp->ds_lock, RW_WRITER);
dsp->ds_promisc = promisc;
rw_exit(&dsp->ds_lock);
dlokack(q, mp, DL_PROMISCOFF_REQ);
return (B_TRUE);
failed:
dlerrorack(q, mp, DL_PROMISCOFF_REQ, dl_err, (t_uscalar_t)err);
return (B_FALSE);
}
/*
* DL_ENABMULTI_REQ
*/
static boolean_t
proto_enabmulti_req(dld_str_t *dsp, union DL_primitives *udlp, mblk_t *mp)
{
dl_enabmulti_req_t *dlp = (dl_enabmulti_req_t *)udlp;
int err = 0;
t_uscalar_t dl_err;
queue_t *q = dsp->ds_wq;
/*
* Because control messages processing is serialized, we don't need
* to hold any lock to read any field of dsp; we hold ds_lock to
* update the ds_passivestate field.
*/
if (dsp->ds_dlstate == DL_UNATTACHED ||
DL_ACK_PENDING(dsp->ds_dlstate)) {
dl_err = DL_OUTSTATE;
goto failed;
}
if (MBLKL(mp) < sizeof (dl_enabmulti_req_t) ||
!MBLKIN(mp, dlp->dl_addr_offset, dlp->dl_addr_length) ||
dlp->dl_addr_length != dsp->ds_mip->mi_addr_length) {
dl_err = DL_BADPRIM;
goto failed;
}
if (dsp->ds_passivestate == DLD_UNINITIALIZED &&
!dls_active_set(dsp->ds_dc)) {
dl_err = DL_SYSERR;
err = EBUSY;
goto failed;
}
err = dls_multicst_add(dsp->ds_dc, mp->b_rptr + dlp->dl_addr_offset);
if (err != 0) {
switch (err) {
case EINVAL:
dl_err = DL_BADADDR;
err = 0;
break;
case ENOSPC:
dl_err = DL_TOOMANY;
err = 0;
break;
default:
dl_err = DL_SYSERR;
break;
}
if (dsp->ds_passivestate == DLD_UNINITIALIZED)
dls_active_clear(dsp->ds_dc);
goto failed;
}
rw_enter(&dsp->ds_lock, RW_WRITER);
if (dsp->ds_passivestate == DLD_UNINITIALIZED)
dsp->ds_passivestate = DLD_ACTIVE;
rw_exit(&dsp->ds_lock);
dlokack(q, mp, DL_ENABMULTI_REQ);
return (B_TRUE);
failed:
dlerrorack(q, mp, DL_ENABMULTI_REQ, dl_err, (t_uscalar_t)err);
return (B_FALSE);
}
/*
* DL_DISABMULTI_REQ
*/
static boolean_t
proto_disabmulti_req(dld_str_t *dsp, union DL_primitives *udlp, mblk_t *mp)
{
dl_disabmulti_req_t *dlp = (dl_disabmulti_req_t *)udlp;
int err = 0;
t_uscalar_t dl_err;
queue_t *q = dsp->ds_wq;
/*
* Because control messages processing is serialized, we don't need
* to hold any lock to read any field of dsp.
*/
if (dsp->ds_dlstate == DL_UNATTACHED ||
DL_ACK_PENDING(dsp->ds_dlstate)) {
dl_err = DL_OUTSTATE;
goto failed;
}
if (MBLKL(mp) < sizeof (dl_disabmulti_req_t) ||
!MBLKIN(mp, dlp->dl_addr_offset, dlp->dl_addr_length) ||
dlp->dl_addr_length != dsp->ds_mip->mi_addr_length) {
dl_err = DL_BADPRIM;
goto failed;
}
err = dls_multicst_remove(dsp->ds_dc, mp->b_rptr + dlp->dl_addr_offset);
if (err != 0) {
switch (err) {
case EINVAL:
dl_err = DL_BADADDR;
err = 0;
break;
case ENOENT:
dl_err = DL_NOTENAB;
err = 0;
break;
default:
dl_err = DL_SYSERR;
break;
}
goto failed;
}
dlokack(q, mp, DL_DISABMULTI_REQ);
return (B_TRUE);
failed:
dlerrorack(q, mp, DL_DISABMULTI_REQ, dl_err, (t_uscalar_t)err);
return (B_FALSE);
}
/*
* DL_PHYS_ADDR_REQ
*/
static boolean_t
proto_physaddr_req(dld_str_t *dsp, union DL_primitives *udlp, mblk_t *mp)
{
dl_phys_addr_req_t *dlp = (dl_phys_addr_req_t *)udlp;
queue_t *q = dsp->ds_wq;
t_uscalar_t dl_err;
char *addr;
uint_t addr_length;
rw_enter(&dsp->ds_lock, RW_READER);
if (MBLKL(mp) < sizeof (dl_phys_addr_req_t)) {
dl_err = DL_BADPRIM;
goto failed;
}
if (dsp->ds_dlstate == DL_UNATTACHED ||
DL_ACK_PENDING(dsp->ds_dlstate)) {
dl_err = DL_OUTSTATE;
goto failed;
}
if (dlp->dl_addr_type != DL_CURR_PHYS_ADDR &&
dlp->dl_addr_type != DL_FACT_PHYS_ADDR) {
dl_err = DL_UNSUPPORTED;
goto failed;
}
addr_length = dsp->ds_mip->mi_addr_length;
if (addr_length > 0) {
addr = kmem_alloc(addr_length, KM_NOSLEEP);
if (addr == NULL) {
rw_exit(&dsp->ds_lock);
merror(q, mp, ENOSR);
return (B_FALSE);
}
/*
* Copy out the address before we drop the lock; we don't
* want to call dlphysaddrack() while holding ds_lock.
*/
bcopy((dlp->dl_addr_type == DL_CURR_PHYS_ADDR) ?
dsp->ds_curr_addr : dsp->ds_fact_addr, addr, addr_length);
rw_exit(&dsp->ds_lock);
dlphysaddrack(q, mp, addr, (t_uscalar_t)addr_length);
kmem_free(addr, addr_length);
} else {
rw_exit(&dsp->ds_lock);
dlphysaddrack(q, mp, NULL, 0);
}
return (B_TRUE);
failed:
rw_exit(&dsp->ds_lock);
dlerrorack(q, mp, DL_PHYS_ADDR_REQ, dl_err, 0);
return (B_FALSE);
}
/*
* DL_SET_PHYS_ADDR_REQ
*/
static boolean_t
proto_setphysaddr_req(dld_str_t *dsp, union DL_primitives *udlp, mblk_t *mp)
{
dl_set_phys_addr_req_t *dlp = (dl_set_phys_addr_req_t *)udlp;
int err = 0;
t_uscalar_t dl_err;
queue_t *q = dsp->ds_wq;
/*
* Because control message processing is serialized, we don't need
* to hold any locks to read any fields of dsp; we only need ds_lock
* to update the ds_passivestate field.
*/
if (dsp->ds_dlstate == DL_UNATTACHED ||
DL_ACK_PENDING(dsp->ds_dlstate)) {
dl_err = DL_OUTSTATE;
goto failed;
}
if (MBLKL(mp) < sizeof (dl_set_phys_addr_req_t) ||
!MBLKIN(mp, dlp->dl_addr_offset, dlp->dl_addr_length) ||
dlp->dl_addr_length != dsp->ds_mip->mi_addr_length) {
dl_err = DL_BADPRIM;
goto failed;
}
if (dsp->ds_passivestate == DLD_UNINITIALIZED &&
!dls_active_set(dsp->ds_dc)) {
dl_err = DL_SYSERR;
err = EBUSY;
goto failed;
}
err = mac_unicst_set(dsp->ds_mh, mp->b_rptr + dlp->dl_addr_offset);
if (err != 0) {
switch (err) {
case EINVAL:
dl_err = DL_BADADDR;
err = 0;
break;
default:
dl_err = DL_SYSERR;
break;
}
if (dsp->ds_passivestate == DLD_UNINITIALIZED)
dls_active_clear(dsp->ds_dc);
goto failed;
}
rw_enter(&dsp->ds_lock, RW_WRITER);
if (dsp->ds_passivestate == DLD_UNINITIALIZED)
dsp->ds_passivestate = DLD_ACTIVE;
rw_exit(&dsp->ds_lock);
dlokack(q, mp, DL_SET_PHYS_ADDR_REQ);
return (B_TRUE);
failed:
dlerrorack(q, mp, DL_SET_PHYS_ADDR_REQ, dl_err, (t_uscalar_t)err);
return (B_FALSE);
}
/*
* DL_UDQOS_REQ
*/
static boolean_t
proto_udqos_req(dld_str_t *dsp, union DL_primitives *udlp, mblk_t *mp)
{
dl_udqos_req_t *dlp = (dl_udqos_req_t *)udlp;
dl_qos_cl_sel1_t *selp;
int off, len;
t_uscalar_t dl_err;
queue_t *q = dsp->ds_wq;
off = dlp->dl_qos_offset;
len = dlp->dl_qos_length;
if (MBLKL(mp) < sizeof (dl_udqos_req_t) || !MBLKIN(mp, off, len)) {
dl_err = DL_BADPRIM;
goto failed;
}
selp = (dl_qos_cl_sel1_t *)(mp->b_rptr + off);
if (selp->dl_qos_type != DL_QOS_CL_SEL1) {
dl_err = DL_BADQOSTYPE;
goto failed;
}
if (selp->dl_priority > (1 << VLAN_PRI_SIZE) - 1 ||
selp->dl_priority < 0) {
dl_err = DL_BADQOSPARAM;
goto failed;
}
if (dsp->ds_dlstate == DL_UNATTACHED ||
DL_ACK_PENDING(dsp->ds_dlstate)) {
dl_err = DL_OUTSTATE;
goto failed;
}
rw_enter(&dsp->ds_lock, RW_WRITER);
dsp->ds_pri = selp->dl_priority;
rw_exit(&dsp->ds_lock);
dlokack(q, mp, DL_UDQOS_REQ);
return (B_TRUE);
failed:
dlerrorack(q, mp, DL_UDQOS_REQ, dl_err, 0);
return (B_FALSE);
}
static boolean_t
check_ip_above(queue_t *q)
{
queue_t *next_q;
boolean_t ret = B_TRUE;
claimstr(q);
next_q = q->q_next;
if (strcmp(next_q->q_qinfo->qi_minfo->mi_idname, "ip") != 0)
ret = B_FALSE;
releasestr(q);
return (ret);
}
/*
* DL_CAPABILITY_REQ
*/
/*ARGSUSED*/
static boolean_t
proto_capability_req(dld_str_t *dsp, union DL_primitives *udlp, mblk_t *mp)
{
dl_capability_req_t *dlp = (dl_capability_req_t *)udlp;
dl_capability_sub_t *sp;
size_t size, len;
offset_t off, end;
t_uscalar_t dl_err;
queue_t *q = dsp->ds_wq;
rw_enter(&dsp->ds_lock, RW_WRITER);
if (MBLKL(mp) < sizeof (dl_capability_req_t)) {
dl_err = DL_BADPRIM;
goto failed;
}
if (dsp->ds_dlstate == DL_UNATTACHED ||
DL_ACK_PENDING(dsp->ds_dlstate)) {
dl_err = DL_OUTSTATE;
goto failed;
}
/*
* This request is overloaded. If there are no requested capabilities
* then we just want to acknowledge with all the capabilities we
* support. Otherwise we enable the set of capabilities requested.
*/
if (dlp->dl_sub_length == 0) {
/* callee drops lock */
return (proto_capability_advertise(dsp, mp));
}
if (!MBLKIN(mp, dlp->dl_sub_offset, dlp->dl_sub_length)) {
dl_err = DL_BADPRIM;
goto failed;
}
dlp->dl_primitive = DL_CAPABILITY_ACK;
off = dlp->dl_sub_offset;
len = dlp->dl_sub_length;
/*
* Walk the list of capabilities to be enabled.
*/
for (end = off + len; off < end; ) {
sp = (dl_capability_sub_t *)(mp->b_rptr + off);
size = sizeof (dl_capability_sub_t) + sp->dl_length;
if (off + size > end ||
!IS_P2ALIGNED(off, sizeof (uint32_t))) {
dl_err = DL_BADPRIM;
goto failed;
}
switch (sp->dl_cap) {
/*
* TCP/IP checksum offload to hardware.
*/
case DL_CAPAB_HCKSUM: {
dl_capab_hcksum_t *hcksump;
dl_capab_hcksum_t hcksum;
hcksump = (dl_capab_hcksum_t *)&sp[1];
/*
* Copy for alignment.
*/
bcopy(hcksump, &hcksum, sizeof (dl_capab_hcksum_t));
dlcapabsetqid(&(hcksum.hcksum_mid), dsp->ds_rq);
bcopy(&hcksum, hcksump, sizeof (dl_capab_hcksum_t));
break;
}
/*
* Large segment offload. (LSO)
*/
case DL_CAPAB_LSO: {
dl_capab_lso_t *lsop;
dl_capab_lso_t lso;
lsop = (dl_capab_lso_t *)&sp[1];
/*
* Copy for alignment.
*/
bcopy(lsop, &lso, sizeof (dl_capab_lso_t));
dlcapabsetqid(&(lso.lso_mid), dsp->ds_rq);
bcopy(&lso, lsop, sizeof (dl_capab_lso_t));
break;
}
/*
* IP polling interface.
*/
case DL_CAPAB_POLL: {
dl_capab_dls_t *pollp;
dl_capab_dls_t poll;
pollp = (dl_capab_dls_t *)&sp[1];
/*
* Copy for alignment.
*/
bcopy(pollp, &poll, sizeof (dl_capab_dls_t));
switch (poll.dls_flags) {
default:
/*FALLTHRU*/
case POLL_DISABLE:
proto_poll_disable(dsp);
break;
case POLL_ENABLE:
ASSERT(!(dld_opt & DLD_OPT_NO_POLL));
/*
* Make sure polling is disabled.
*/
proto_poll_disable(dsp);
/*
* Note that only IP should enable POLL.
*/
if (check_ip_above(dsp->ds_rq) &&
proto_poll_enable(dsp, &poll)) {
bzero(&poll, sizeof (dl_capab_dls_t));
poll.dls_flags = POLL_ENABLE;
} else {
bzero(&poll, sizeof (dl_capab_dls_t));
poll.dls_flags = POLL_DISABLE;
}
break;
}
dlcapabsetqid(&(poll.dls_mid), dsp->ds_rq);
bcopy(&poll, pollp, sizeof (dl_capab_dls_t));
break;
}
case DL_CAPAB_SOFT_RING: {
dl_capab_dls_t *soft_ringp;
dl_capab_dls_t soft_ring;
soft_ringp = (dl_capab_dls_t *)&sp[1];
/*
* Copy for alignment.
*/
bcopy(soft_ringp, &soft_ring,
sizeof (dl_capab_dls_t));
switch (soft_ring.dls_flags) {
default:
/*FALLTHRU*/
case SOFT_RING_DISABLE:
proto_soft_ring_disable(dsp);
break;
case SOFT_RING_ENABLE:
ASSERT(!(dld_opt & DLD_OPT_NO_SOFTRING));
/*
* Make sure soft_ring is disabled.
*/
proto_soft_ring_disable(dsp);
/*
* Note that only IP can enable soft ring.
*/
if (check_ip_above(dsp->ds_rq) &&
proto_soft_ring_enable(dsp, &soft_ring)) {
bzero(&soft_ring,
sizeof (dl_capab_dls_t));
soft_ring.dls_flags = SOFT_RING_ENABLE;
} else {
bzero(&soft_ring,
sizeof (dl_capab_dls_t));
soft_ring.dls_flags = SOFT_RING_DISABLE;
}
break;
}
dlcapabsetqid(&(soft_ring.dls_mid), dsp->ds_rq);
bcopy(&soft_ring, soft_ringp,
sizeof (dl_capab_dls_t));
break;
}
default:
break;
}
off += size;
}
rw_exit(&dsp->ds_lock);
qreply(q, mp);
return (B_TRUE);
failed:
rw_exit(&dsp->ds_lock);
dlerrorack(q, mp, DL_CAPABILITY_REQ, dl_err, 0);
return (B_FALSE);
}
/*
* DL_NOTIFY_REQ
*/
static boolean_t
proto_notify_req(dld_str_t *dsp, union DL_primitives *udlp, mblk_t *mp)
{
dl_notify_req_t *dlp = (dl_notify_req_t *)udlp;
t_uscalar_t dl_err;
queue_t *q = dsp->ds_wq;
uint_t note =
DL_NOTE_PROMISC_ON_PHYS |
DL_NOTE_PROMISC_OFF_PHYS |
DL_NOTE_PHYS_ADDR |
DL_NOTE_LINK_UP |
DL_NOTE_LINK_DOWN |
DL_NOTE_CAPAB_RENEG |
DL_NOTE_SPEED;
rw_enter(&dsp->ds_lock, RW_WRITER);
if (MBLKL(mp) < sizeof (dl_notify_req_t)) {
dl_err = DL_BADPRIM;
goto failed;
}
if (dsp->ds_dlstate == DL_UNATTACHED ||
DL_ACK_PENDING(dsp->ds_dlstate)) {
dl_err = DL_OUTSTATE;
goto failed;
}
note &= ~(mac_no_notification(dsp->ds_mh));
/*
* Cache the notifications that are being enabled.
*/
dsp->ds_notifications = dlp->dl_notifications & note;
rw_exit(&dsp->ds_lock);
/*
* The ACK carries all notifications regardless of which set is
* being enabled.
*/
dlnotifyack(q, mp, note);
/*
* Solicit DL_NOTIFY_IND messages for each enabled notification.
*/
rw_enter(&dsp->ds_lock, RW_READER);
if (dsp->ds_notifications != 0) {
rw_exit(&dsp->ds_lock);
dld_str_notify_ind(dsp);
} else {
rw_exit(&dsp->ds_lock);
}
return (B_TRUE);
failed:
rw_exit(&dsp->ds_lock);
dlerrorack(q, mp, DL_NOTIFY_REQ, dl_err, 0);
return (B_FALSE);
}
/*
* DL_UNITDATA_REQ
*/
void
dld_wput_proto_data(dld_str_t *dsp, mblk_t *mp)
{
queue_t *q = dsp->ds_wq;
dl_unitdata_req_t *dlp = (dl_unitdata_req_t *)mp->b_rptr;
off_t off;
size_t len, size;
const uint8_t *addr;
uint16_t sap;
uint_t addr_length;
mblk_t *bp, *payload;
uint32_t start, stuff, end, value, flags;
t_uscalar_t dl_err;
uint_t max_sdu;
if (MBLKL(mp) < sizeof (dl_unitdata_req_t) || mp->b_cont == NULL) {
dl_err = DL_BADPRIM;
goto failed;
}
addr_length = dsp->ds_mip->mi_addr_length;
off = dlp->dl_dest_addr_offset;
len = dlp->dl_dest_addr_length;
if (!MBLKIN(mp, off, len) || !IS_P2ALIGNED(off, sizeof (uint16_t))) {
dl_err = DL_BADPRIM;
goto failed;
}
if (len != addr_length + sizeof (uint16_t)) {
dl_err = DL_BADADDR;
goto failed;
}
addr = mp->b_rptr + off;
sap = *(uint16_t *)(mp->b_rptr + off + addr_length);
/*
* Check the length of the packet and the block types.
*/
size = 0;
payload = mp->b_cont;
for (bp = payload; bp != NULL; bp = bp->b_cont) {
if (DB_TYPE(bp) != M_DATA)
goto baddata;
size += MBLKL(bp);
}
mac_sdu_get(dsp->ds_mh, NULL, &max_sdu);
if (size > max_sdu)
goto baddata;
/*
* Build a packet header.
*/
if ((bp = dls_header(dsp->ds_dc, addr, sap, dlp->dl_priority.dl_max,
&payload)) == NULL) {
dl_err = DL_BADADDR;
goto failed;
}
/*
* We no longer need the M_PROTO header, so free it.
*/
freeb(mp);
/*
* Transfer the checksum offload information if it is present.
*/
hcksum_retrieve(payload, NULL, NULL, &start, &stuff, &end, &value,
&flags);
(void) hcksum_assoc(bp, NULL, NULL, start, stuff, end, value, flags, 0);
/*
* Link the payload onto the new header.
*/
ASSERT(bp->b_cont == NULL);
bp->b_cont = payload;
dld_tx_single(dsp, bp);
return;
failed:
dlerrorack(q, mp, DL_UNITDATA_REQ, dl_err, 0);
return;
baddata:
dluderrorind(q, mp, (void *)addr, len, DL_BADDATA, 0);
}
/*
* DL_PASSIVE_REQ
*/
/* ARGSUSED */
static boolean_t
proto_passive_req(dld_str_t *dsp, union DL_primitives *udlp, mblk_t *mp)
{
t_uscalar_t dl_err;
/*
* READER lock is enough because ds_passivestate can only be changed
* as the result of non-data message processing.
*/
rw_enter(&dsp->ds_lock, RW_READER);
/*
* If we've already become active by issuing an active primitive,
* then it's too late to try to become passive.
*/
if (dsp->ds_passivestate == DLD_ACTIVE) {
dl_err = DL_OUTSTATE;
goto failed;
}
if (MBLKL(mp) < sizeof (dl_passive_req_t)) {
dl_err = DL_BADPRIM;
goto failed;
}
dsp->ds_passivestate = DLD_PASSIVE;
rw_exit(&dsp->ds_lock);
dlokack(dsp->ds_wq, mp, DL_PASSIVE_REQ);
return (B_TRUE);
failed:
rw_exit(&dsp->ds_lock);
dlerrorack(dsp->ds_wq, mp, DL_PASSIVE_REQ, dl_err, 0);
return (B_FALSE);
}
/*
* Catch-all handler.
*/
static boolean_t
proto_req(dld_str_t *dsp, union DL_primitives *dlp, mblk_t *mp)
{
dlerrorack(dsp->ds_wq, mp, dlp->dl_primitive, DL_UNSUPPORTED, 0);
return (B_FALSE);
}
static void
proto_poll_disable(dld_str_t *dsp)
{
mac_handle_t mh;
ASSERT(RW_WRITE_HELD(&dsp->ds_lock));
if (!dsp->ds_polling)
return;
/*
* It should be impossible to enable raw mode if polling is turned on.
*/
ASSERT(dsp->ds_mode != DLD_RAW);
/*
* Reset the resource_add callback.
*/
mh = dls_mac(dsp->ds_dc);
mac_resource_set(mh, NULL, NULL);
mac_resources(mh);
/*
* Set receive function back to default.
*/
dls_rx_set(dsp->ds_dc, (dsp->ds_mode == DLD_FASTPATH) ?
dld_str_rx_fastpath : dld_str_rx_unitdata, dsp);
/*
* Note that polling is disabled.
*/
dsp->ds_polling = B_FALSE;
}
static boolean_t
proto_poll_enable(dld_str_t *dsp, dl_capab_dls_t *pollp)
{
mac_handle_t mh;
ASSERT(RW_WRITE_HELD(&dsp->ds_lock));
ASSERT(!dsp->ds_polling);
/*
* We cannot enable polling if raw mode
* has been enabled.
*/
if (dsp->ds_mode == DLD_RAW)
return (B_FALSE);
mh = dls_mac(dsp->ds_dc);
/*
* Register resources.
*/
mac_resource_set(mh, (mac_resource_add_t)pollp->dls_ring_add,
(void *)pollp->dls_rx_handle);
mac_resources(mh);
/*
* Set the upstream receive function.
*/
dls_rx_set(dsp->ds_dc, (dls_rx_t)pollp->dls_rx,
(void *)pollp->dls_rx_handle);
/*
* Note that polling is enabled. This prevents further DLIOCHDRINFO
* ioctls from overwriting the receive function pointer.
*/
dsp->ds_polling = B_TRUE;
return (B_TRUE);
}
static void
proto_soft_ring_disable(dld_str_t *dsp)
{
ASSERT(RW_WRITE_HELD(&dsp->ds_lock));
if (!dsp->ds_soft_ring)
return;
/*
* It should be impossible to enable raw mode if soft_ring is turned on.
*/
ASSERT(dsp->ds_mode != DLD_RAW);
proto_change_soft_ring_fanout(dsp, SOFT_RING_NONE);
/*
* Note that fanout is disabled.
*/
dsp->ds_soft_ring = B_FALSE;
}
static boolean_t
proto_soft_ring_enable(dld_str_t *dsp, dl_capab_dls_t *soft_ringp)
{
ASSERT(RW_WRITE_HELD(&dsp->ds_lock));
ASSERT(!dsp->ds_soft_ring);
/*
* We cannot enable soft_ring if raw mode
* has been enabled.
*/
if (dsp->ds_mode == DLD_RAW)
return (B_FALSE);
if (dls_soft_ring_enable(dsp->ds_dc, soft_ringp) == B_FALSE)
return (B_FALSE);
dsp->ds_soft_ring = B_TRUE;
return (B_TRUE);
}
static void
proto_change_soft_ring_fanout(dld_str_t *dsp, int type)
{
dls_channel_t dc = dsp->ds_dc;
if (type == SOFT_RING_NONE) {
dls_rx_set(dc, (dsp->ds_mode == DLD_FASTPATH) ?
dld_str_rx_fastpath : dld_str_rx_unitdata, dsp);
} else if (type != SOFT_RING_NONE) {
dls_rx_set(dc, (dls_rx_t)dls_soft_ring_fanout, dc);
}
}
/*
* DL_CAPABILITY_ACK/DL_ERROR_ACK
*/
static boolean_t
proto_capability_advertise(dld_str_t *dsp, mblk_t *mp)
{
dl_capability_ack_t *dlap;
dl_capability_sub_t *dlsp;
size_t subsize;
dl_capab_dls_t poll;
dl_capab_dls_t soft_ring;
dl_capab_hcksum_t hcksum;
dl_capab_lso_t lso;
dl_capab_zerocopy_t zcopy;
uint8_t *ptr;
queue_t *q = dsp->ds_wq;
mblk_t *mp1;
boolean_t is_vlan = (dsp->ds_vid != VLAN_ID_NONE);
boolean_t poll_capable = B_FALSE;
boolean_t soft_ring_capable = B_FALSE;
boolean_t hcksum_capable = B_FALSE;
boolean_t zcopy_capable = B_FALSE;
boolean_t lso_capable = B_FALSE;
mac_capab_lso_t mac_lso;
ASSERT(RW_WRITE_HELD(&dsp->ds_lock));
/*
* Initially assume no capabilities.
*/
subsize = 0;
/*
* Check if soft ring can be enabled on this interface. Note that we
* do not enable softring on any legacy drivers, because doing that
* would hurt the performance if the legacy driver has its own taskq
* implementation. Further, most high-performance legacy drivers do
* have their own taskq implementation.
*
* If advertising DL_CAPAB_SOFT_RING has not been explicitly disabled,
* reserve space for that capability.
*/
if (!mac_is_legacy(dsp->ds_mh) && !(dld_opt & DLD_OPT_NO_SOFTRING)) {
soft_ring_capable = B_TRUE;
subsize += sizeof (dl_capability_sub_t) +
sizeof (dl_capab_dls_t);
}
/*
* Check if polling can be enabled on this interface.
* If advertising DL_CAPAB_POLL has not been explicitly disabled
* then reserve space for that capability.
*/
if (mac_capab_get(dsp->ds_mh, MAC_CAPAB_POLL, NULL) &&
!(dld_opt & DLD_OPT_NO_POLL) && !is_vlan) {
poll_capable = B_TRUE;
subsize += sizeof (dl_capability_sub_t) +
sizeof (dl_capab_dls_t);
}
/*
* Check if checksum offload is supported on this MAC. Don't
* advertise DL_CAPAB_HCKSUM if the underlying MAC is VLAN incapable,
* since it might not be able to do the hardware checksum offload
* with the correct offset.
*/
bzero(&hcksum, sizeof (dl_capab_hcksum_t));
if ((!is_vlan || (!mac_capab_get(dsp->ds_mh, MAC_CAPAB_NO_NATIVEVLAN,
NULL))) && mac_capab_get(dsp->ds_mh, MAC_CAPAB_HCKSUM,
&hcksum.hcksum_txflags)) {
if (hcksum.hcksum_txflags != 0) {
hcksum_capable = B_TRUE;
subsize += sizeof (dl_capability_sub_t) +
sizeof (dl_capab_hcksum_t);
}
}
/*
* Check if LSO is supported on this MAC, then reserve space for
* the DL_CAPAB_LSO capability.
*/
if (mac_capab_get(dsp->ds_mh, MAC_CAPAB_LSO, &mac_lso)) {
lso_capable = B_TRUE;
subsize += sizeof (dl_capability_sub_t) +
sizeof (dl_capab_lso_t);
}
/*
* Check if zerocopy is supported on this interface.
* If advertising DL_CAPAB_ZEROCOPY has not been explicitly disabled
* then reserve space for that capability.
*/
if (!mac_capab_get(dsp->ds_mh, MAC_CAPAB_NO_ZCOPY, NULL) &&
!(dld_opt & DLD_OPT_NO_ZEROCOPY)) {
zcopy_capable = B_TRUE;
subsize += sizeof (dl_capability_sub_t) +
sizeof (dl_capab_zerocopy_t);
}
/*
* If there are no capabilities to advertise or if we
* can't allocate a response, send a DL_ERROR_ACK.
*/
if ((mp1 = reallocb(mp,
sizeof (dl_capability_ack_t) + subsize, 0)) == NULL) {
rw_exit(&dsp->ds_lock);
dlerrorack(q, mp, DL_CAPABILITY_REQ, DL_NOTSUPPORTED, 0);
return (B_FALSE);
}
mp = mp1;
DB_TYPE(mp) = M_PROTO;
mp->b_wptr = mp->b_rptr + sizeof (dl_capability_ack_t) + subsize;
bzero(mp->b_rptr, MBLKL(mp));
dlap = (dl_capability_ack_t *)mp->b_rptr;
dlap->dl_primitive = DL_CAPABILITY_ACK;
dlap->dl_sub_offset = sizeof (dl_capability_ack_t);
dlap->dl_sub_length = subsize;
ptr = (uint8_t *)&dlap[1];
/*
* IP polling interface.
*/
if (poll_capable) {
/*
* Attempt to disable just in case this is a re-negotiation;
* READER lock is enough because ds_polling can only be
* changed as the result of non-data message processing.
*/
proto_poll_disable(dsp);
dlsp = (dl_capability_sub_t *)ptr;
dlsp->dl_cap = DL_CAPAB_POLL;
dlsp->dl_length = sizeof (dl_capab_dls_t);
ptr += sizeof (dl_capability_sub_t);
bzero(&poll, sizeof (dl_capab_dls_t));
poll.dls_version = POLL_VERSION_1;
poll.dls_flags = POLL_CAPABLE;
poll.dls_tx_handle = (uintptr_t)dsp;
poll.dls_tx = (uintptr_t)str_mdata_fastpath_put;
dlcapabsetqid(&(poll.dls_mid), dsp->ds_rq);
bcopy(&poll, ptr, sizeof (dl_capab_dls_t));
ptr += sizeof (dl_capab_dls_t);
}
if (soft_ring_capable) {
dlsp = (dl_capability_sub_t *)ptr;
dlsp->dl_cap = DL_CAPAB_SOFT_RING;
dlsp->dl_length = sizeof (dl_capab_dls_t);
ptr += sizeof (dl_capability_sub_t);
bzero(&soft_ring, sizeof (dl_capab_dls_t));
soft_ring.dls_version = SOFT_RING_VERSION_1;
soft_ring.dls_flags = SOFT_RING_CAPABLE;
soft_ring.dls_tx_handle = (uintptr_t)dsp;
soft_ring.dls_tx = (uintptr_t)str_mdata_fastpath_put;
soft_ring.dls_ring_change_status =
(uintptr_t)proto_change_soft_ring_fanout;
soft_ring.dls_ring_bind = (uintptr_t)soft_ring_bind;
soft_ring.dls_ring_unbind = (uintptr_t)soft_ring_unbind;
dlcapabsetqid(&(soft_ring.dls_mid), dsp->ds_rq);
bcopy(&soft_ring, ptr, sizeof (dl_capab_dls_t));
ptr += sizeof (dl_capab_dls_t);
}
/*
* TCP/IP checksum offload.
*/
if (hcksum_capable) {
dlsp = (dl_capability_sub_t *)ptr;
dlsp->dl_cap = DL_CAPAB_HCKSUM;
dlsp->dl_length = sizeof (dl_capab_hcksum_t);
ptr += sizeof (dl_capability_sub_t);
hcksum.hcksum_version = HCKSUM_VERSION_1;
dlcapabsetqid(&(hcksum.hcksum_mid), dsp->ds_rq);
bcopy(&hcksum, ptr, sizeof (dl_capab_hcksum_t));
ptr += sizeof (dl_capab_hcksum_t);
}
/*
* Large segment offload. (LSO)
*/
if (lso_capable) {
dlsp = (dl_capability_sub_t *)ptr;
dlsp->dl_cap = DL_CAPAB_LSO;
dlsp->dl_length = sizeof (dl_capab_lso_t);
ptr += sizeof (dl_capability_sub_t);
lso.lso_version = LSO_VERSION_1;
lso.lso_flags = mac_lso.lso_flags;
lso.lso_max = mac_lso.lso_basic_tcp_ipv4.lso_max;
/* Simply enable LSO with DLD */
dsp->ds_lso = B_TRUE;
dsp->ds_lso_max = lso.lso_max;
dlcapabsetqid(&(lso.lso_mid), dsp->ds_rq);
bcopy(&lso, ptr, sizeof (dl_capab_lso_t));
ptr += sizeof (dl_capab_lso_t);
} else {
dsp->ds_lso = B_FALSE;
dsp->ds_lso_max = 0;
}
/*
* Zero copy
*/
if (zcopy_capable) {
dlsp = (dl_capability_sub_t *)ptr;
dlsp->dl_cap = DL_CAPAB_ZEROCOPY;
dlsp->dl_length = sizeof (dl_capab_zerocopy_t);
ptr += sizeof (dl_capability_sub_t);
bzero(&zcopy, sizeof (dl_capab_zerocopy_t));
zcopy.zerocopy_version = ZEROCOPY_VERSION_1;
zcopy.zerocopy_flags = DL_CAPAB_VMSAFE_MEM;
dlcapabsetqid(&(zcopy.zerocopy_mid), dsp->ds_rq);
bcopy(&zcopy, ptr, sizeof (dl_capab_zerocopy_t));
ptr += sizeof (dl_capab_zerocopy_t);
}
ASSERT(ptr == mp->b_rptr + sizeof (dl_capability_ack_t) + subsize);
rw_exit(&dsp->ds_lock);
qreply(q, mp);
return (B_TRUE);
}
/*
* Disable any enabled capabilities.
*/
void
dld_capabilities_disable(dld_str_t *dsp)
{
if (dsp->ds_polling)
proto_poll_disable(dsp);
if (dsp->ds_soft_ring)
proto_soft_ring_disable(dsp);
}