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path: root/drivers/infiniband/ulp/iser/iser_verbs.c
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Diffstat (limited to 'drivers/infiniband/ulp/iser/iser_verbs.c')
-rw-r--r--drivers/infiniband/ulp/iser/iser_verbs.c112
1 files changed, 25 insertions, 87 deletions
diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index c1f44c41f501..699e075ae1b3 100644
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -68,59 +68,23 @@ static void iser_event_handler(struct ib_event_handler *handler,
static int iser_create_device_ib_res(struct iser_device *device)
{
struct ib_device *ib_dev = device->ib_device;
- int i, max_cqe;
if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS)) {
iser_err("IB device does not support memory registrations\n");
return -1;
}
- device->comps_used = min_t(int, num_online_cpus(),
- ib_dev->num_comp_vectors);
-
- device->comps = kcalloc(device->comps_used, sizeof(*device->comps),
- GFP_KERNEL);
- if (!device->comps)
- goto comps_err;
-
- max_cqe = min(ISER_MAX_CQ_LEN, ib_dev->attrs.max_cqe);
-
- iser_info("using %d CQs, device %s supports %d vectors max_cqe %d\n",
- device->comps_used, dev_name(&ib_dev->dev),
- ib_dev->num_comp_vectors, max_cqe);
-
device->pd = ib_alloc_pd(ib_dev,
iser_always_reg ? 0 : IB_PD_UNSAFE_GLOBAL_RKEY);
if (IS_ERR(device->pd))
goto pd_err;
- for (i = 0; i < device->comps_used; i++) {
- struct iser_comp *comp = &device->comps[i];
-
- comp->cq = ib_alloc_cq(ib_dev, comp, max_cqe, i,
- IB_POLL_SOFTIRQ);
- if (IS_ERR(comp->cq)) {
- comp->cq = NULL;
- goto cq_err;
- }
- }
-
INIT_IB_EVENT_HANDLER(&device->event_handler, ib_dev,
iser_event_handler);
ib_register_event_handler(&device->event_handler);
return 0;
-cq_err:
- for (i = 0; i < device->comps_used; i++) {
- struct iser_comp *comp = &device->comps[i];
-
- if (comp->cq)
- ib_free_cq(comp->cq);
- }
- ib_dealloc_pd(device->pd);
pd_err:
- kfree(device->comps);
-comps_err:
iser_err("failed to allocate an IB resource\n");
return -1;
}
@@ -131,20 +95,9 @@ comps_err:
*/
static void iser_free_device_ib_res(struct iser_device *device)
{
- int i;
-
- for (i = 0; i < device->comps_used; i++) {
- struct iser_comp *comp = &device->comps[i];
-
- ib_free_cq(comp->cq);
- comp->cq = NULL;
- }
-
ib_unregister_event_handler(&device->event_handler);
ib_dealloc_pd(device->pd);
- kfree(device->comps);
- device->comps = NULL;
device->pd = NULL;
}
@@ -287,70 +240,57 @@ static int iser_create_ib_conn_res(struct ib_conn *ib_conn)
struct ib_device *ib_dev;
struct ib_qp_init_attr init_attr;
int ret = -ENOMEM;
- int index, min_index = 0;
+ unsigned int max_send_wr, cq_size;
BUG_ON(ib_conn->device == NULL);
device = ib_conn->device;
ib_dev = device->ib_device;
- memset(&init_attr, 0, sizeof init_attr);
+ if (ib_conn->pi_support)
+ max_send_wr = ISER_QP_SIG_MAX_REQ_DTOS + 1;
+ else
+ max_send_wr = ISER_QP_MAX_REQ_DTOS + 1;
+ max_send_wr = min_t(unsigned int, max_send_wr,
+ (unsigned int)ib_dev->attrs.max_qp_wr);
- mutex_lock(&ig.connlist_mutex);
- /* select the CQ with the minimal number of usages */
- for (index = 0; index < device->comps_used; index++) {
- if (device->comps[index].active_qps <
- device->comps[min_index].active_qps)
- min_index = index;
+ cq_size = max_send_wr + ISER_QP_MAX_RECV_DTOS;
+ ib_conn->cq = ib_cq_pool_get(ib_dev, cq_size, -1, IB_POLL_SOFTIRQ);
+ if (IS_ERR(ib_conn->cq)) {
+ ret = PTR_ERR(ib_conn->cq);
+ goto cq_err;
}
- ib_conn->comp = &device->comps[min_index];
- ib_conn->comp->active_qps++;
- mutex_unlock(&ig.connlist_mutex);
- iser_info("cq index %d used for ib_conn %p\n", min_index, ib_conn);
+ ib_conn->cq_size = cq_size;
+
+ memset(&init_attr, 0, sizeof(init_attr));
init_attr.event_handler = iser_qp_event_callback;
init_attr.qp_context = (void *)ib_conn;
- init_attr.send_cq = ib_conn->comp->cq;
- init_attr.recv_cq = ib_conn->comp->cq;
+ init_attr.send_cq = ib_conn->cq;
+ init_attr.recv_cq = ib_conn->cq;
init_attr.cap.max_recv_wr = ISER_QP_MAX_RECV_DTOS;
init_attr.cap.max_send_sge = 2;
init_attr.cap.max_recv_sge = 1;
init_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
init_attr.qp_type = IB_QPT_RC;
- if (ib_conn->pi_support) {
- init_attr.cap.max_send_wr = ISER_QP_SIG_MAX_REQ_DTOS + 1;
+ init_attr.cap.max_send_wr = max_send_wr;
+ if (ib_conn->pi_support)
init_attr.create_flags |= IB_QP_CREATE_INTEGRITY_EN;
- iser_conn->max_cmds =
- ISER_GET_MAX_XMIT_CMDS(ISER_QP_SIG_MAX_REQ_DTOS);
- } else {
- if (ib_dev->attrs.max_qp_wr > ISER_QP_MAX_REQ_DTOS) {
- init_attr.cap.max_send_wr = ISER_QP_MAX_REQ_DTOS + 1;
- iser_conn->max_cmds =
- ISER_GET_MAX_XMIT_CMDS(ISER_QP_MAX_REQ_DTOS);
- } else {
- init_attr.cap.max_send_wr = ib_dev->attrs.max_qp_wr;
- iser_conn->max_cmds =
- ISER_GET_MAX_XMIT_CMDS(ib_dev->attrs.max_qp_wr);
- iser_dbg("device %s supports max_send_wr %d\n",
- dev_name(&device->ib_device->dev),
- ib_dev->attrs.max_qp_wr);
- }
- }
+ iser_conn->max_cmds = ISER_GET_MAX_XMIT_CMDS(max_send_wr - 1);
ret = rdma_create_qp(ib_conn->cma_id, device->pd, &init_attr);
if (ret)
goto out_err;
ib_conn->qp = ib_conn->cma_id->qp;
- iser_info("setting conn %p cma_id %p qp %p\n",
+ iser_info("setting conn %p cma_id %p qp %p max_send_wr %d\n",
ib_conn, ib_conn->cma_id,
- ib_conn->cma_id->qp);
+ ib_conn->cma_id->qp, max_send_wr);
return ret;
out_err:
- mutex_lock(&ig.connlist_mutex);
- ib_conn->comp->active_qps--;
- mutex_unlock(&ig.connlist_mutex);
+ ib_cq_pool_put(ib_conn->cq, ib_conn->cq_size);
+cq_err:
iser_err("unable to alloc mem or create resource, err %d\n", ret);
return ret;
@@ -462,10 +402,8 @@ static void iser_free_ib_conn_res(struct iser_conn *iser_conn,
iser_conn, ib_conn->cma_id, ib_conn->qp);
if (ib_conn->qp != NULL) {
- mutex_lock(&ig.connlist_mutex);
- ib_conn->comp->active_qps--;
- mutex_unlock(&ig.connlist_mutex);
rdma_destroy_qp(ib_conn->cma_id);
+ ib_cq_pool_put(ib_conn->cq, ib_conn->cq_size);
ib_conn->qp = NULL;
}