@@ -317,18 +317,6 @@ struct iser_conn;
struct ib_conn;
struct iscsi_iser_task;
-/**
- * struct iser_comp - iSER completion context
- *
- * @cq: completion queue
- * @active_qps: Number of active QPs attached
- * to completion context
- */
-struct iser_comp {
- struct ib_cq *cq;
- int active_qps;
-};
-
/**
* struct iser_device - Memory registration operations
* per-device registration schemes
@@ -365,9 +353,6 @@ struct iser_reg_ops {
* @event_handler: IB events handle routine
* @ig_list: entry in devices list
* @refcount: Reference counter, dominated by open iser connections
- * @comps_used: Number of completion contexts used, Min between online
- * cpus and device max completion vectors
- * @comps: Dinamically allocated array of completion handlers
* @reg_ops: Registration ops
* @remote_inv_sup: Remote invalidate is supported on this device
*/
@@ -377,8 +362,6 @@ struct iser_device {
struct ib_event_handler event_handler;
struct list_head ig_list;
int refcount;
- int comps_used;
- struct iser_comp *comps;
const struct iser_reg_ops *reg_ops;
bool remote_inv_sup;
};
@@ -456,7 +439,6 @@ struct iser_fr_pool {
* @sig_count: send work request signal count
* @rx_wr: receive work request for batch posts
* @device: reference to iser device
- * @comp: iser completion context
* @fr_pool: connection fast registration poool
* @pi_support: Indicate device T10-PI support
*/
@@ -467,7 +449,6 @@ struct ib_conn {
u8 sig_count;
struct ib_recv_wr rx_wr[ISER_MIN_POSTED_RX];
struct iser_device *device;
- struct iser_comp *comp;
struct iser_fr_pool fr_pool;
bool pi_support;
struct ib_cqe reg_cqe;
@@ -68,40 +68,17 @@ 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 ret, i, max_cqe;
+ int ret;
ret = iser_assign_reg_ops(device);
if (ret)
return ret;
- 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, ib_dev->name,
- 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;
- }
+ if (IS_ERR(device->pd)) {
+ ret = PTR_ERR(device->pd);
+ goto out;
}
INIT_IB_EVENT_HANDLER(&device->event_handler, ib_dev,
@@ -109,19 +86,9 @@ static int iser_create_device_ib_res(struct iser_device *device)
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:
+out:
iser_err("failed to allocate an IB resource\n");
- return -1;
+ return ret;
}
/**
@@ -130,20 +97,8 @@ static int iser_create_device_ib_res(struct iser_device *device)
*/
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;
}
@@ -423,7 +378,6 @@ 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;
BUG_ON(ib_conn->device == NULL);
@@ -431,23 +385,10 @@ static int iser_create_ib_conn_res(struct ib_conn *ib_conn)
ib_dev = device->ib_device;
memset(&init_attr, 0, sizeof init_attr);
-
- 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;
- }
- 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);
-
+ init_attr.create_flags = IB_QP_CREATE_ASSIGN_CQS;
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.poll_ctx = IB_POLL_SOFTIRQ;
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;
@@ -483,11 +424,7 @@ static int iser_create_ib_conn_res(struct ib_conn *ib_conn)
return ret;
out_err:
- mutex_lock(&ig.connlist_mutex);
- ib_conn->comp->active_qps--;
- mutex_unlock(&ig.connlist_mutex);
iser_err("unable to alloc mem or create resource, err %d\n", ret);
-
return ret;
}
@@ -597,9 +534,6 @@ 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_conn->qp = NULL;
}