/*
* 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 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 <linux/errno.h>
#include <linux/err.h>
#include <ib_verbs.h>
#include <ib_cache.h>
/* 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_set(&pd->usecnt, 0);
}
return pd;
}
EXPORT_SYMBOL(ib_alloc_pd);
int ib_dealloc_pd(struct ib_pd *pd)
{
if (atomic_read(&pd->usecnt))
return -EBUSY;
return pd->device->dealloc_pd(pd);
}
EXPORT_SYMBOL(ib_dealloc_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_inc(&pd->usecnt);
}
return ah;
}
EXPORT_SYMBOL(ib_create_ah);
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;
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->dgid;
ret = ib_find_cached_gid(pd->device, &grh->sgid, &port_num,
&gid_index);
if (ret)
return ERR_PTR(ret);
ah_attr.grh.sgid_index = (u8) gid_index;
flow_class = be32_to_cpu(grh->version_tclass_flow);
ah_attr.grh.flow_label = flow_class & 0xFFFFF;
ah_attr.grh.traffic_class = (flow_class >> 20) & 0xFF;
ah_attr.grh.hop_limit = grh->hop_limit;
}
return ib_create_ah(pd, &ah_attr);
}
EXPORT_SYMBOL(ib_create_ah_from_wc);
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;
}
EXPORT_SYMBOL(ib_modify_ah);
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;
}
EXPORT_SYMBOL(ib_query_ah);
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_dec(&pd->usecnt);
return ret;
}
EXPORT_SYMBOL(ib_destroy_ah);
/* 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_inc(&pd->usecnt);
atomic_inc(&qp_init_attr->send_cq->usecnt);
atomic_inc(&qp_init_attr->recv_cq->usecnt);
if (qp_init_attr->srq)
atomic_inc(&qp_init_attr->srq->usecnt);
}
return qp;
}
EXPORT_SYMBOL(ib_create_qp);
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);
}
EXPORT_SYMBOL(ib_modify_qp);
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;
}
EXPORT_SYMBOL(ib_query_qp);
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_dec(&pd->usecnt);
atomic_dec(&scq->usecnt);
atomic_dec(&rcq->usecnt);
if (srq)
atomic_dec(&srq->usecnt);
}
return ret;
}
EXPORT_SYMBOL(ib_destroy_qp);
/* 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)
{
struct ib_cq *cq;
cq = device->create_cq(device, cqe, 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_set(&cq->usecnt, 0);
}
return cq;
}
EXPORT_SYMBOL(ib_create_cq);
int ib_destroy_cq(struct ib_cq *cq)
{
if (atomic_read(&cq->usecnt))
return -EBUSY;
return cq->device->destroy_cq(cq);
}
EXPORT_SYMBOL(ib_destroy_cq);
int ib_resize_cq(struct ib_cq *cq,
int cqe)
{
int ret;
if (!cq->device->resize_cq)
return -ENOSYS;
ret = cq->device->resize_cq(cq, &cqe);
if (!ret)
cq->cqe = cqe;
return ret;
}
EXPORT_SYMBOL(ib_resize_cq);
/* 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_inc(&pd->usecnt);
atomic_set(&mr->usecnt, 0);
}
return mr;
}
EXPORT_SYMBOL(ib_get_dma_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_inc(&pd->usecnt);
atomic_set(&mr->usecnt, 0);
}
return mr;
}
EXPORT_SYMBOL(ib_reg_phys_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_read(&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_dec(&old_pd->usecnt);
atomic_inc(&pd->usecnt);
}
return ret;
}
EXPORT_SYMBOL(ib_rereg_phys_mr);
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;
}
EXPORT_SYMBOL(ib_query_mr);
int ib_dereg_mr(struct ib_mr *mr)
{
struct ib_pd *pd;
int ret;
if (atomic_read(&mr->usecnt))
return -EBUSY;
pd = mr->pd;
ret = mr->device->dereg_mr(mr);
if (!ret)
atomic_dec(&pd->usecnt);
return ret;
}
EXPORT_SYMBOL(ib_dereg_mr);
/* 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_inc(&pd->usecnt);
}
return mw;
}
EXPORT_SYMBOL(ib_alloc_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_dec(&pd->usecnt);
return ret;
}
EXPORT_SYMBOL(ib_dealloc_mw);
/* "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_inc(&pd->usecnt);
}
return fmr;
}
EXPORT_SYMBOL(ib_alloc_fmr);
int ib_unmap_fmr(struct list_head *fmr_list)
{
struct ib_fmr *fmr;
if (list_empty(fmr_list))
return 0;
fmr = list_entry(fmr_list->next, struct ib_fmr, list);
return fmr->device->unmap_fmr(fmr_list);
}
EXPORT_SYMBOL(ib_unmap_fmr);
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_dec(&pd->usecnt);
return ret;
}
EXPORT_SYMBOL(ib_dealloc_fmr);
/* Multicast groups */
int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
{
return qp->device->attach_mcast ?
qp->device->attach_mcast(qp, gid, lid) :
-ENOSYS;
}
EXPORT_SYMBOL(ib_attach_mcast);
int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
{
return qp->device->detach_mcast ?
qp->device->detach_mcast(qp, gid, lid) :
-ENOSYS;
}
EXPORT_SYMBOL(ib_detach_mcast);
