diff options
Diffstat (limited to 'drivers/infiniband')
-rw-r--r-- | drivers/infiniband/ulp/iser/iscsi_iser.h | 17 | ||||
-rw-r--r-- | drivers/infiniband/ulp/iser/iser_verbs.c | 130 |
2 files changed, 103 insertions, 44 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h index 296be43..ef7d3be 100644 --- a/drivers/infiniband/ulp/iser/iscsi_iser.h +++ b/drivers/infiniband/ulp/iser/iscsi_iser.h @@ -177,6 +177,7 @@ struct iser_data_buf { /* fwd declarations */ struct iser_device; +struct iser_cq_desc; struct iscsi_iser_conn; struct iscsi_iser_task; struct iscsi_endpoint; @@ -226,16 +227,21 @@ struct iser_rx_desc { char pad[ISER_RX_PAD_SIZE]; } __attribute__((packed)); +#define ISER_MAX_CQ 4 + struct iser_device { struct ib_device *ib_device; struct ib_pd *pd; - struct ib_cq *rx_cq; - struct ib_cq *tx_cq; + struct ib_cq *rx_cq[ISER_MAX_CQ]; + struct ib_cq *tx_cq[ISER_MAX_CQ]; struct ib_mr *mr; - struct tasklet_struct cq_tasklet; + struct tasklet_struct cq_tasklet[ISER_MAX_CQ]; struct ib_event_handler event_handler; struct list_head ig_list; /* entry in ig devices list */ int refcount; + int cq_active_qps[ISER_MAX_CQ]; + int cqs_used; + struct iser_cq_desc *cq_desc; }; struct iser_conn { @@ -287,6 +293,11 @@ struct iser_page_vec { int data_size; }; +struct iser_cq_desc { + struct iser_device *device; + int cq_index; +}; + struct iser_global { struct mutex device_list_mutex;/* */ struct list_head device_list; /* all iSER devices */ diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c index 2dddabd..95a49af 100644 --- a/drivers/infiniband/ulp/iser/iser_verbs.c +++ b/drivers/infiniband/ulp/iser/iser_verbs.c @@ -70,32 +70,50 @@ static void iser_event_handler(struct ib_event_handler *handler, */ static int iser_create_device_ib_res(struct iser_device *device) { + int i, j; + struct iser_cq_desc *cq_desc; + + device->cqs_used = min(ISER_MAX_CQ, device->ib_device->num_comp_vectors); + iser_err("using %d CQs, device %s supports %d vectors\n", device->cqs_used, + device->ib_device->name, device->ib_device->num_comp_vectors); + + device->cq_desc = kmalloc(sizeof(struct iser_cq_desc) * device->cqs_used, + GFP_KERNEL); + if (device->cq_desc == NULL) + goto cq_desc_err; + cq_desc = device->cq_desc; + device->pd = ib_alloc_pd(device->ib_device); if (IS_ERR(device->pd)) goto pd_err; - device->rx_cq = ib_create_cq(device->ib_device, - iser_cq_callback, - iser_cq_event_callback, - (void *)device, - ISER_MAX_RX_CQ_LEN, 0); - if (IS_ERR(device->rx_cq)) - goto rx_cq_err; + for (i = 0; i < device->cqs_used; i++) { + cq_desc[i].device = device; + cq_desc[i].cq_index = i; + + device->rx_cq[i] = ib_create_cq(device->ib_device, + iser_cq_callback, + iser_cq_event_callback, + (void *)&cq_desc[i], + ISER_MAX_RX_CQ_LEN, i); + if (IS_ERR(device->rx_cq[i])) + goto cq_err; - device->tx_cq = ib_create_cq(device->ib_device, - NULL, iser_cq_event_callback, - (void *)device, - ISER_MAX_TX_CQ_LEN, 0); + device->tx_cq[i] = ib_create_cq(device->ib_device, + NULL, iser_cq_event_callback, + (void *)&cq_desc[i], + ISER_MAX_TX_CQ_LEN, i); - if (IS_ERR(device->tx_cq)) - goto tx_cq_err; + if (IS_ERR(device->tx_cq[i])) + goto cq_err; - if (ib_req_notify_cq(device->rx_cq, IB_CQ_NEXT_COMP)) - goto cq_arm_err; + if (ib_req_notify_cq(device->rx_cq[i], IB_CQ_NEXT_COMP)) + goto cq_err; - tasklet_init(&device->cq_tasklet, - iser_cq_tasklet_fn, - (unsigned long)device); + tasklet_init(&device->cq_tasklet[i], + iser_cq_tasklet_fn, + (unsigned long)&cq_desc[i]); + } device->mr = ib_get_dma_mr(device->pd, IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE | @@ -113,14 +131,19 @@ static int iser_create_device_ib_res(struct iser_device *device) handler_err: ib_dereg_mr(device->mr); dma_mr_err: - tasklet_kill(&device->cq_tasklet); -cq_arm_err: - ib_destroy_cq(device->tx_cq); -tx_cq_err: - ib_destroy_cq(device->rx_cq); -rx_cq_err: + for (j = 0; j < device->cqs_used; j++) + tasklet_kill(&device->cq_tasklet[j]); +cq_err: + for (j = 0; j < i; j++) { + if (device->tx_cq[j]) + ib_destroy_cq(device->tx_cq[j]); + if (device->rx_cq[j]) + ib_destroy_cq(device->rx_cq[j]); + } ib_dealloc_pd(device->pd); pd_err: + kfree(device->cq_desc); +cq_desc_err: iser_err("failed to allocate an IB resource\n"); return -1; } @@ -131,18 +154,24 @@ pd_err: */ static void iser_free_device_ib_res(struct iser_device *device) { + int i; BUG_ON(device->mr == NULL); - tasklet_kill(&device->cq_tasklet); + for (i = 0; i < device->cqs_used; i++) { + tasklet_kill(&device->cq_tasklet[i]); + (void)ib_destroy_cq(device->tx_cq[i]); + (void)ib_destroy_cq(device->rx_cq[i]); + device->tx_cq[i] = NULL; + device->rx_cq[i] = NULL; + } + (void)ib_unregister_event_handler(&device->event_handler); (void)ib_dereg_mr(device->mr); - (void)ib_destroy_cq(device->tx_cq); - (void)ib_destroy_cq(device->rx_cq); (void)ib_dealloc_pd(device->pd); + kfree(device->cq_desc); + device->mr = NULL; - device->tx_cq = NULL; - device->rx_cq = NULL; device->pd = NULL; } @@ -157,6 +186,7 @@ static int iser_create_ib_conn_res(struct iser_conn *ib_conn) struct ib_qp_init_attr init_attr; int req_err, resp_err, ret = -ENOMEM; struct ib_fmr_pool_param params; + int index, min_index = 0; BUG_ON(ib_conn->device == NULL); @@ -220,10 +250,20 @@ static int iser_create_ib_conn_res(struct iser_conn *ib_conn) 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->cqs_used; index++) + if (device->cq_active_qps[index] < + device->cq_active_qps[min_index]) + min_index = index; + device->cq_active_qps[min_index]++; + mutex_unlock(&ig.connlist_mutex); + iser_err("cq index %d used for ib_conn %p\n", min_index, ib_conn); + init_attr.event_handler = iser_qp_event_callback; init_attr.qp_context = (void *)ib_conn; - init_attr.send_cq = device->tx_cq; - init_attr.recv_cq = device->rx_cq; + init_attr.send_cq = device->tx_cq[min_index]; + init_attr.recv_cq = device->rx_cq[min_index]; init_attr.cap.max_send_wr = ISER_QP_MAX_REQ_DTOS; init_attr.cap.max_recv_wr = ISER_QP_MAX_RECV_DTOS; init_attr.cap.max_send_sge = 2; @@ -252,6 +292,7 @@ out_err: */ static int iser_free_ib_conn_res(struct iser_conn *ib_conn, int can_destroy_id) { + int cq_index; BUG_ON(ib_conn == NULL); iser_err("freeing conn %p cma_id %p fmr pool %p qp %p\n", @@ -262,9 +303,12 @@ static int iser_free_ib_conn_res(struct iser_conn *ib_conn, int can_destroy_id) if (ib_conn->fmr_pool != NULL) ib_destroy_fmr_pool(ib_conn->fmr_pool); - if (ib_conn->qp != NULL) - rdma_destroy_qp(ib_conn->cma_id); + if (ib_conn->qp != NULL) { + cq_index = ((struct iser_cq_desc *)ib_conn->qp->recv_cq->cq_context)->cq_index; + ib_conn->device->cq_active_qps[cq_index]--; + rdma_destroy_qp(ib_conn->cma_id); + } /* if cma handler context, the caller acts s.t the cma destroy the id */ if (ib_conn->cma_id != NULL && can_destroy_id) rdma_destroy_id(ib_conn->cma_id); @@ -791,9 +835,9 @@ static void iser_handle_comp_error(struct iser_tx_desc *desc, } } -static int iser_drain_tx_cq(struct iser_device *device) +static int iser_drain_tx_cq(struct iser_device *device, int cq_index) { - struct ib_cq *cq = device->tx_cq; + struct ib_cq *cq = device->tx_cq[cq_index]; struct ib_wc wc; struct iser_tx_desc *tx_desc; struct iser_conn *ib_conn; @@ -822,8 +866,10 @@ static int iser_drain_tx_cq(struct iser_device *device) static void iser_cq_tasklet_fn(unsigned long data) { - struct iser_device *device = (struct iser_device *)data; - struct ib_cq *cq = device->rx_cq; + struct iser_cq_desc *cq_desc = (struct iser_cq_desc *)data; + struct iser_device *device = cq_desc->device; + int cq_index = cq_desc->cq_index; + struct ib_cq *cq = device->rx_cq[cq_index]; struct ib_wc wc; struct iser_rx_desc *desc; unsigned long xfer_len; @@ -851,19 +897,21 @@ static void iser_cq_tasklet_fn(unsigned long data) } completed_rx++; if (!(completed_rx & 63)) - completed_tx += iser_drain_tx_cq(device); + completed_tx += iser_drain_tx_cq(device, cq_index); } /* #warning "it is assumed here that arming CQ only once its empty" * * " would not cause interrupts to be missed" */ ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); - completed_tx += iser_drain_tx_cq(device); + completed_tx += iser_drain_tx_cq(device, cq_index); iser_dbg("got %d rx %d tx completions\n", completed_rx, completed_tx); } static void iser_cq_callback(struct ib_cq *cq, void *cq_context) { - struct iser_device *device = (struct iser_device *)cq_context; + struct iser_cq_desc *cq_desc = (struct iser_cq_desc *)cq_context; + struct iser_device *device = cq_desc->device; + int cq_index = cq_desc->cq_index; - tasklet_schedule(&device->cq_tasklet); + tasklet_schedule(&device->cq_tasklet[cq_index]); } |