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/*
* Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2004 Infinicon Corporation. All rights reserved.
* Copyright (c) 2004 Intel Corporation. All rights reserved.
* Copyright (c) 2004 Topspin Corporation. All rights reserved.
* Copyright (c) 2004 Voltaire Corporation. All rights reserved.
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
* Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* $Id: verbs.c 1349 2004-12-16 21:09:43Z roland $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/contrib/rdma/rdma_verbs.c 178784 2008-05-05 18:35:55Z kmacy $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/libkern.h>
#include <sys/module.h>
#include <sys/endian.h>
#include <contrib/rdma/ib_verbs.h>
#include <contrib/rdma/ib_cache.h>
int ib_rate_to_mult(enum ib_rate rate)
{
switch (rate) {
case IB_RATE_2_5_GBPS: return 1;
case IB_RATE_5_GBPS: return 2;
case IB_RATE_10_GBPS: return 4;
case IB_RATE_20_GBPS: return 8;
case IB_RATE_30_GBPS: return 12;
case IB_RATE_40_GBPS: return 16;
case IB_RATE_60_GBPS: return 24;
case IB_RATE_80_GBPS: return 32;
case IB_RATE_120_GBPS: return 48;
default: return -1;
}
}
enum ib_rate mult_to_ib_rate(int mult)
{
switch (mult) {
case 1: return IB_RATE_2_5_GBPS;
case 2: return IB_RATE_5_GBPS;
case 4: return IB_RATE_10_GBPS;
case 8: return IB_RATE_20_GBPS;
case 12: return IB_RATE_30_GBPS;
case 16: return IB_RATE_40_GBPS;
case 24: return IB_RATE_60_GBPS;
case 32: return IB_RATE_80_GBPS;
case 48: return IB_RATE_120_GBPS;
default: return IB_RATE_PORT_CURRENT;
}
}
enum rdma_transport_type
rdma_node_get_transport(enum rdma_node_type node_type)
{
switch (node_type) {
case RDMA_NODE_IB_CA:
case RDMA_NODE_IB_SWITCH:
case RDMA_NODE_IB_ROUTER:
return RDMA_TRANSPORT_IB;
case RDMA_NODE_RNIC:
return RDMA_TRANSPORT_IWARP;
default:
panic("bad condition");
return 0;
}
}
/* Protection domains */
struct ib_pd *ib_alloc_pd(struct ib_device *device)
{
struct ib_pd *pd;
pd = device->alloc_pd(device, NULL, NULL);
if (!IS_ERR(pd)) {
pd->device = device;
pd->uobject = NULL;
atomic_store_rel_int(&pd->usecnt, 0);
}
return pd;
}
int ib_dealloc_pd(struct ib_pd *pd)
{
if (atomic_load_acq_int(&pd->usecnt))
return (EBUSY);
return pd->device->dealloc_pd(pd);
}
/* Address handles */
struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
{
struct ib_ah *ah;
ah = pd->device->create_ah(pd, ah_attr);
if (!IS_ERR(ah)) {
ah->device = pd->device;
ah->pd = pd;
ah->uobject = NULL;
atomic_add_acq_int(&pd->usecnt, 1);
}
return ah;
}
int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,
struct ib_grh *grh, struct ib_ah_attr *ah_attr)
{
u32 flow_class;
u16 gid_index;
int ret;
memset(ah_attr, 0, sizeof *ah_attr);
ah_attr->dlid = wc->slid;
ah_attr->sl = wc->sl;
ah_attr->src_path_bits = wc->dlid_path_bits;
ah_attr->port_num = port_num;
if (wc->wc_flags & IB_WC_GRH) {
ah_attr->ah_flags = IB_AH_GRH;
ah_attr->grh.dgid = grh->sgid;
ret = ib_find_cached_gid(device, &grh->dgid, &port_num,
&gid_index);
if (ret)
return ret;
ah_attr->grh.sgid_index = (u8) gid_index;
flow_class = be32toh(grh->version_tclass_flow);
ah_attr->grh.flow_label = flow_class & 0xFFFFF;
ah_attr->grh.hop_limit = 0xFF;
ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
}
return 0;
}
struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
struct ib_grh *grh, u8 port_num)
{
struct ib_ah_attr ah_attr;
int ret;
ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
if (ret)
return ERR_PTR(ret);
return ib_create_ah(pd, &ah_attr);
}
int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
{
return ah->device->modify_ah ?
ah->device->modify_ah(ah, ah_attr) :
ENOSYS;
}
int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
{
return ah->device->query_ah ?
ah->device->query_ah(ah, ah_attr) :
ENOSYS;
}
int ib_destroy_ah(struct ib_ah *ah)
{
struct ib_pd *pd;
int ret;
pd = ah->pd;
ret = ah->device->destroy_ah(ah);
if (!ret)
atomic_subtract_acq_int(&pd->usecnt, 1);
return ret;
}
/* Shared receive queues */
struct ib_srq *ib_create_srq(struct ib_pd *pd,
struct ib_srq_init_attr *srq_init_attr)
{
struct ib_srq *srq;
if (!pd->device->create_srq)
return ERR_PTR(ENOSYS);
srq = pd->device->create_srq(pd, srq_init_attr, NULL);
if (!IS_ERR(srq)) {
srq->device = pd->device;
srq->pd = pd;
srq->uobject = NULL;
srq->event_handler = srq_init_attr->event_handler;
srq->srq_context = srq_init_attr->srq_context;
atomic_add_acq_int(&pd->usecnt, 1);
atomic_store_rel_int(&srq->usecnt, 0);
}
return srq;
}
int ib_modify_srq(struct ib_srq *srq,
struct ib_srq_attr *srq_attr,
enum ib_srq_attr_mask srq_attr_mask)
{
return srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL);
}
int ib_query_srq(struct ib_srq *srq,
struct ib_srq_attr *srq_attr)
{
return srq->device->query_srq ?
srq->device->query_srq(srq, srq_attr) : ENOSYS;
}
int ib_destroy_srq(struct ib_srq *srq)
{
struct ib_pd *pd;
int ret;
if (atomic_load_acq_int(&srq->usecnt))
return (EBUSY);
pd = srq->pd;
ret = srq->device->destroy_srq(srq);
if (!ret)
atomic_subtract_acq_int(&pd->usecnt, 1);
return ret;
}
/* Queue pairs */
struct ib_qp *ib_create_qp(struct ib_pd *pd,
struct ib_qp_init_attr *qp_init_attr)
{
struct ib_qp *qp;
qp = pd->device->create_qp(pd, qp_init_attr, NULL);
if (!IS_ERR(qp)) {
qp->device = pd->device;
qp->pd = pd;
qp->send_cq = qp_init_attr->send_cq;
qp->recv_cq = qp_init_attr->recv_cq;
qp->srq = qp_init_attr->srq;
qp->uobject = NULL;
qp->event_handler = qp_init_attr->event_handler;
qp->qp_context = qp_init_attr->qp_context;
qp->qp_type = qp_init_attr->qp_type;
atomic_add_acq_int(&pd->usecnt, 1);
atomic_add_acq_int(&qp_init_attr->send_cq->usecnt, 1);
atomic_add_acq_int(&qp_init_attr->recv_cq->usecnt, 1);
if (qp_init_attr->srq)
atomic_add_acq_int(&qp_init_attr->srq->usecnt, 1);
}
return qp;
}
static const struct {
int valid;
enum ib_qp_attr_mask req_param[IB_QPT_RAW_ETY + 1];
enum ib_qp_attr_mask opt_param[IB_QPT_RAW_ETY + 1];
} qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
[IB_QPS_RESET] = {
[IB_QPS_RESET] = { .valid = 1 },
[IB_QPS_ERR] = { .valid = 1 },
[IB_QPS_INIT] = {
.valid = 1,
.req_param = {
[IB_QPT_UD] = (IB_QP_PKEY_INDEX |
IB_QP_PORT |
IB_QP_QKEY),
[IB_QPT_UC] = (IB_QP_PKEY_INDEX |
IB_QP_PORT |
IB_QP_ACCESS_FLAGS),
[IB_QPT_RC] = (IB_QP_PKEY_INDEX |
IB_QP_PORT |
IB_QP_ACCESS_FLAGS),
[IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
IB_QP_QKEY),
[IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
IB_QP_QKEY),
}
},
},
[IB_QPS_INIT] = {
[IB_QPS_RESET] = { .valid = 1 },
[IB_QPS_ERR] = { .valid = 1 },
[IB_QPS_INIT] = {
.valid = 1,
.opt_param = {
[IB_QPT_UD] = (IB_QP_PKEY_INDEX |
IB_QP_PORT |
IB_QP_QKEY),
[IB_QPT_UC] = (IB_QP_PKEY_INDEX |
IB_QP_PORT |
IB_QP_ACCESS_FLAGS),
[IB_QPT_RC] = (IB_QP_PKEY_INDEX |
IB_QP_PORT |
IB_QP_ACCESS_FLAGS),
[IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
IB_QP_QKEY),
[IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
IB_QP_QKEY),
}
},
[IB_QPS_RTR] = {
.valid = 1,
.req_param = {
[IB_QPT_UC] = (IB_QP_AV |
IB_QP_PATH_MTU |
IB_QP_DEST_QPN |
IB_QP_RQ_PSN),
[IB_QPT_RC] = (IB_QP_AV |
IB_QP_PATH_MTU |
IB_QP_DEST_QPN |
IB_QP_RQ_PSN |
IB_QP_MAX_DEST_RD_ATOMIC |
IB_QP_MIN_RNR_TIMER),
},
.opt_param = {
[IB_QPT_UD] = (IB_QP_PKEY_INDEX |
IB_QP_QKEY),
[IB_QPT_UC] = (IB_QP_ALT_PATH |
IB_QP_ACCESS_FLAGS |
IB_QP_PKEY_INDEX),
[IB_QPT_RC] = (IB_QP_ALT_PATH |
IB_QP_ACCESS_FLAGS |
IB_QP_PKEY_INDEX),
[IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
IB_QP_QKEY),
[IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
IB_QP_QKEY),
}
}
},
[IB_QPS_RTR] = {
[IB_QPS_RESET] = { .valid = 1 },
[IB_QPS_ERR] = { .valid = 1 },
[IB_QPS_RTS] = {
.valid = 1,
.req_param = {
[IB_QPT_UD] = IB_QP_SQ_PSN,
[IB_QPT_UC] = IB_QP_SQ_PSN,
[IB_QPT_RC] = (IB_QP_TIMEOUT |
IB_QP_RETRY_CNT |
IB_QP_RNR_RETRY |
IB_QP_SQ_PSN |
IB_QP_MAX_QP_RD_ATOMIC),
[IB_QPT_SMI] = IB_QP_SQ_PSN,
[IB_QPT_GSI] = IB_QP_SQ_PSN,
},
.opt_param = {
[IB_QPT_UD] = (IB_QP_CUR_STATE |
IB_QP_QKEY),
[IB_QPT_UC] = (IB_QP_CUR_STATE |
IB_QP_ALT_PATH |
IB_QP_ACCESS_FLAGS |
IB_QP_PATH_MIG_STATE),
[IB_QPT_RC] = (IB_QP_CUR_STATE |
IB_QP_ALT_PATH |
IB_QP_ACCESS_FLAGS |
IB_QP_MIN_RNR_TIMER |
IB_QP_PATH_MIG_STATE),
[IB_QPT_SMI] = (IB_QP_CUR_STATE |
IB_QP_QKEY),
[IB_QPT_GSI] = (IB_QP_CUR_STATE |
IB_QP_QKEY),
}
}
},
[IB_QPS_RTS] = {
[IB_QPS_RESET] = { .valid = 1 },
[IB_QPS_ERR] = { .valid = 1 },
[IB_QPS_RTS] = {
.valid = 1,
.opt_param = {
[IB_QPT_UD] = (IB_QP_CUR_STATE |
IB_QP_QKEY),
[IB_QPT_UC] = (IB_QP_CUR_STATE |
IB_QP_ACCESS_FLAGS |
IB_QP_ALT_PATH |
IB_QP_PATH_MIG_STATE),
[IB_QPT_RC] = (IB_QP_CUR_STATE |
IB_QP_ACCESS_FLAGS |
IB_QP_ALT_PATH |
IB_QP_PATH_MIG_STATE |
IB_QP_MIN_RNR_TIMER),
[IB_QPT_SMI] = (IB_QP_CUR_STATE |
IB_QP_QKEY),
[IB_QPT_GSI] = (IB_QP_CUR_STATE |
IB_QP_QKEY),
}
},
[IB_QPS_SQD] = {
.valid = 1,
.opt_param = {
[IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
[IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
[IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
[IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
[IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
}
},
},
[IB_QPS_SQD] = {
[IB_QPS_RESET] = { .valid = 1 },
[IB_QPS_ERR] = { .valid = 1 },
[IB_QPS_RTS] = {
.valid = 1,
.opt_param = {
[IB_QPT_UD] = (IB_QP_CUR_STATE |
IB_QP_QKEY),
[IB_QPT_UC] = (IB_QP_CUR_STATE |
IB_QP_ALT_PATH |
IB_QP_ACCESS_FLAGS |
IB_QP_PATH_MIG_STATE),
[IB_QPT_RC] = (IB_QP_CUR_STATE |
IB_QP_ALT_PATH |
IB_QP_ACCESS_FLAGS |
IB_QP_MIN_RNR_TIMER |
IB_QP_PATH_MIG_STATE),
[IB_QPT_SMI] = (IB_QP_CUR_STATE |
IB_QP_QKEY),
[IB_QPT_GSI] = (IB_QP_CUR_STATE |
IB_QP_QKEY),
}
},
[IB_QPS_SQD] = {
.valid = 1,
.opt_param = {
[IB_QPT_UD] = (IB_QP_PKEY_INDEX |
IB_QP_QKEY),
[IB_QPT_UC] = (IB_QP_AV |
IB_QP_ALT_PATH |
IB_QP_ACCESS_FLAGS |
IB_QP_PKEY_INDEX |
IB_QP_PATH_MIG_STATE),
[IB_QPT_RC] = (IB_QP_PORT |
IB_QP_AV |
IB_QP_TIMEOUT |
IB_QP_RETRY_CNT |
IB_QP_RNR_RETRY |
IB_QP_MAX_QP_RD_ATOMIC |
IB_QP_MAX_DEST_RD_ATOMIC |
IB_QP_ALT_PATH |
IB_QP_ACCESS_FLAGS |
IB_QP_PKEY_INDEX |
IB_QP_MIN_RNR_TIMER |
IB_QP_PATH_MIG_STATE),
[IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
IB_QP_QKEY),
[IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
IB_QP_QKEY),
}
}
},
[IB_QPS_SQE] = {
[IB_QPS_RESET] = { .valid = 1 },
[IB_QPS_ERR] = { .valid = 1 },
[IB_QPS_RTS] = {
.valid = 1,
.opt_param = {
[IB_QPT_UD] = (IB_QP_CUR_STATE |
IB_QP_QKEY),
[IB_QPT_UC] = (IB_QP_CUR_STATE |
IB_QP_ACCESS_FLAGS),
[IB_QPT_SMI] = (IB_QP_CUR_STATE |
IB_QP_QKEY),
[IB_QPT_GSI] = (IB_QP_CUR_STATE |
IB_QP_QKEY),
}
}
},
[IB_QPS_ERR] = {
[IB_QPS_RESET] = { .valid = 1 },
[IB_QPS_ERR] = { .valid = 1 }
}
};
int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
enum ib_qp_type type, enum ib_qp_attr_mask mask)
{
enum ib_qp_attr_mask req_param, opt_param;
if (cur_state < 0 || cur_state > IB_QPS_ERR ||
next_state < 0 || next_state > IB_QPS_ERR)
return 0;
if (mask & IB_QP_CUR_STATE &&
cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
return 0;
if (!qp_state_table[cur_state][next_state].valid)
return 0;
req_param = qp_state_table[cur_state][next_state].req_param[type];
opt_param = qp_state_table[cur_state][next_state].opt_param[type];
if ((mask & req_param) != req_param)
return 0;
if (mask & ~(req_param | opt_param | IB_QP_STATE))
return 0;
return 1;
}
int ib_modify_qp(struct ib_qp *qp,
struct ib_qp_attr *qp_attr,
int qp_attr_mask)
{
return qp->device->modify_qp(qp, qp_attr, qp_attr_mask, NULL);
}
int ib_query_qp(struct ib_qp *qp,
struct ib_qp_attr *qp_attr,
int qp_attr_mask,
struct ib_qp_init_attr *qp_init_attr)
{
return qp->device->query_qp ?
qp->device->query_qp(qp, qp_attr, qp_attr_mask, qp_init_attr) :
ENOSYS;
}
int ib_destroy_qp(struct ib_qp *qp)
{
struct ib_pd *pd;
struct ib_cq *scq, *rcq;
struct ib_srq *srq;
int ret;
pd = qp->pd;
scq = qp->send_cq;
rcq = qp->recv_cq;
srq = qp->srq;
ret = qp->device->destroy_qp(qp);
if (!ret) {
atomic_subtract_acq_int(&pd->usecnt, 1);
atomic_subtract_acq_int(&scq->usecnt, 1);
atomic_subtract_acq_int(&rcq->usecnt, 1);
if (srq)
atomic_subtract_acq_int(&srq->usecnt, 1);
}
return ret;
}
/* Completion queues */
struct ib_cq *ib_create_cq(struct ib_device *device,
ib_comp_handler comp_handler,
void (*event_handler)(struct ib_event *, void *),
void *cq_context, int cqe, int comp_vector)
{
struct ib_cq *cq;
cq = device->create_cq(device, cqe, comp_vector, NULL, NULL);
if (!IS_ERR(cq)) {
cq->device = device;
cq->uobject = NULL;
cq->comp_handler = comp_handler;
cq->event_handler = event_handler;
cq->cq_context = cq_context;
atomic_store_rel_int(&cq->usecnt, 0);
}
return cq;
}
int ib_destroy_cq(struct ib_cq *cq)
{
if (atomic_load_acq_int(&cq->usecnt))
return (EBUSY);
return cq->device->destroy_cq(cq);
}
int ib_resize_cq(struct ib_cq *cq, int cqe)
{
return cq->device->resize_cq ?
cq->device->resize_cq(cq, cqe, NULL) : ENOSYS;
}
/* Memory regions */
struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
{
struct ib_mr *mr;
mr = pd->device->get_dma_mr(pd, mr_access_flags);
if (!IS_ERR(mr)) {
mr->device = pd->device;
mr->pd = pd;
mr->uobject = NULL;
atomic_add_acq_int(&pd->usecnt, 1);
atomic_store_rel_int(&mr->usecnt, 0);
}
return mr;
}
struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
struct ib_phys_buf *phys_buf_array,
int num_phys_buf,
int mr_access_flags,
u64 *iova_start)
{
struct ib_mr *mr;
mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
mr_access_flags, iova_start);
if (!IS_ERR(mr)) {
mr->device = pd->device;
mr->pd = pd;
mr->uobject = NULL;
atomic_add_acq_int(&pd->usecnt, 1);
atomic_store_rel_int(&mr->usecnt, 0);
}
return mr;
}
int ib_rereg_phys_mr(struct ib_mr *mr,
int mr_rereg_mask,
struct ib_pd *pd,
struct ib_phys_buf *phys_buf_array,
int num_phys_buf,
int mr_access_flags,
u64 *iova_start)
{
struct ib_pd *old_pd;
int ret;
if (!mr->device->rereg_phys_mr)
return (ENOSYS);
if (atomic_load_acq_int(&mr->usecnt))
return (EBUSY);
old_pd = mr->pd;
ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
phys_buf_array, num_phys_buf,
mr_access_flags, iova_start);
if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
atomic_subtract_acq_int(&old_pd->usecnt, 1);
atomic_add_acq_int(&pd->usecnt, 1);
}
return ret;
}
int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
{
return mr->device->query_mr ?
mr->device->query_mr(mr, mr_attr) : ENOSYS;
}
int ib_dereg_mr(struct ib_mr *mr)
{
struct ib_pd *pd;
int ret;
if (atomic_load_acq_int(&mr->usecnt))
return (EBUSY);
pd = mr->pd;
ret = mr->device->dereg_mr(mr);
if (!ret)
atomic_subtract_acq_int(&pd->usecnt, 1);
return ret;
}
/* Memory windows */
struct ib_mw *ib_alloc_mw(struct ib_pd *pd)
{
struct ib_mw *mw;
if (!pd->device->alloc_mw)
return ERR_PTR(ENOSYS);
mw = pd->device->alloc_mw(pd);
if (!IS_ERR(mw)) {
mw->device = pd->device;
mw->pd = pd;
mw->uobject = NULL;
atomic_add_acq_int(&pd->usecnt, 1);
}
return mw;
}
int ib_dealloc_mw(struct ib_mw *mw)
{
struct ib_pd *pd;
int ret;
pd = mw->pd;
ret = mw->device->dealloc_mw(mw);
if (!ret)
atomic_subtract_acq_int(&pd->usecnt, 1);
return ret;
}
/* "Fast" memory regions */
struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
int mr_access_flags,
struct ib_fmr_attr *fmr_attr)
{
struct ib_fmr *fmr;
if (!pd->device->alloc_fmr)
return ERR_PTR(ENOSYS);
fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
if (!IS_ERR(fmr)) {
fmr->device = pd->device;
fmr->pd = pd;
atomic_add_acq_int(&pd->usecnt, 1);
}
return fmr;
}
int ib_unmap_fmr(struct ib_fmr_list_head *fmr_list)
{
struct ib_fmr *fmr;
if (TAILQ_EMPTY(fmr_list))
return 0;
fmr = TAILQ_FIRST(fmr_list);
return fmr->device->unmap_fmr(fmr_list);
}
int ib_dealloc_fmr(struct ib_fmr *fmr)
{
struct ib_pd *pd;
int ret;
pd = fmr->pd;
ret = fmr->device->dealloc_fmr(fmr);
if (!ret)
atomic_subtract_acq_int(&pd->usecnt, 1);
return ret;
}
/* Multicast groups */
int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
{
if (!qp->device->attach_mcast)
return (ENOSYS);
if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
return (EINVAL);
return qp->device->attach_mcast(qp, gid, lid);
}
int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
{
if (!qp->device->detach_mcast)
return (ENOSYS);
if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
return (EINVAL);
return qp->device->detach_mcast(qp, gid, lid);
}