diff options
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/ulp/srp/ib_srp.c | 27 | ||||
| -rw-r--r-- | drivers/infiniband/ulp/srp/ib_srp.h | 13 |
2 files changed, 25 insertions, 15 deletions
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c index 7f8f16bad75..b8b09a4f012 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.c +++ b/drivers/infiniband/ulp/srp/ib_srp.c @@ -291,7 +291,7 @@ static void srp_free_target_ib(struct srp_target_port *target) for (i = 0; i < SRP_RQ_SIZE; ++i) srp_free_iu(target->srp_host, target->rx_ring[i]); - for (i = 0; i < SRP_SQ_SIZE + 1; ++i) + for (i = 0; i < SRP_SQ_SIZE; ++i) srp_free_iu(target->srp_host, target->tx_ring[i]); } @@ -822,7 +822,7 @@ static int srp_post_recv(struct srp_target_port *target) spin_lock_irqsave(target->scsi_host->host_lock, flags); - next = target->rx_head & (SRP_RQ_SIZE - 1); + next = target->rx_head & SRP_RQ_MASK; wr.wr_id = next; iu = target->rx_ring[next]; @@ -989,19 +989,19 @@ static void srp_send_completion(struct ib_cq *cq, void *target_ptr) static struct srp_iu *__srp_get_tx_iu(struct srp_target_port *target, enum srp_request_type req_type) { - s32 min = (req_type == SRP_REQ_TASK_MGMT) ? 1 : 2; + s32 rsv = (req_type == SRP_REQ_TASK_MGMT) ? 0 : SRP_TSK_MGMT_SQ_SIZE; srp_send_completion(target->send_cq, target); if (target->tx_head - target->tx_tail >= SRP_SQ_SIZE) return NULL; - if (target->req_lim < min) { + if (target->req_lim <= rsv) { ++target->zero_req_lim; return NULL; } - return target->tx_ring[target->tx_head & SRP_SQ_SIZE]; + return target->tx_ring[target->tx_head & SRP_SQ_MASK]; } /* @@ -1020,7 +1020,7 @@ static int __srp_post_send(struct srp_target_port *target, list.lkey = target->srp_host->srp_dev->mr->lkey; wr.next = NULL; - wr.wr_id = target->tx_head & SRP_SQ_SIZE; + wr.wr_id = target->tx_head & SRP_SQ_MASK; wr.sg_list = &list; wr.num_sge = 1; wr.opcode = IB_WR_SEND; @@ -1121,7 +1121,7 @@ static int srp_alloc_iu_bufs(struct srp_target_port *target) goto err; } - for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { + for (i = 0; i < SRP_SQ_SIZE; ++i) { target->tx_ring[i] = srp_alloc_iu(target->srp_host, srp_max_iu_len, GFP_KERNEL, DMA_TO_DEVICE); @@ -1137,7 +1137,7 @@ err: target->rx_ring[i] = NULL; } - for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { + for (i = 0; i < SRP_SQ_SIZE; ++i) { srp_free_iu(target->srp_host, target->tx_ring[i]); target->tx_ring[i] = NULL; } @@ -1626,9 +1626,9 @@ static struct scsi_host_template srp_template = { .eh_abort_handler = srp_abort, .eh_device_reset_handler = srp_reset_device, .eh_host_reset_handler = srp_reset_host, - .can_queue = SRP_SQ_SIZE, + .can_queue = SRP_CMD_SQ_SIZE, .this_id = -1, - .cmd_per_lun = SRP_SQ_SIZE, + .cmd_per_lun = SRP_CMD_SQ_SIZE, .use_clustering = ENABLE_CLUSTERING, .shost_attrs = srp_host_attrs }; @@ -1813,7 +1813,7 @@ static int srp_parse_options(const char *buf, struct srp_target_port *target) printk(KERN_WARNING PFX "bad max cmd_per_lun parameter '%s'\n", p); goto out; } - target->scsi_host->cmd_per_lun = min(token, SRP_SQ_SIZE); + target->scsi_host->cmd_per_lun = min(token, SRP_CMD_SQ_SIZE); break; case SRP_OPT_IO_CLASS: @@ -1891,7 +1891,7 @@ static ssize_t srp_create_target(struct device *dev, INIT_LIST_HEAD(&target->free_reqs); INIT_LIST_HEAD(&target->req_queue); - for (i = 0; i < SRP_SQ_SIZE; ++i) { + for (i = 0; i < SRP_CMD_SQ_SIZE; ++i) { target->req_ring[i].index = i; list_add_tail(&target->req_ring[i].list, &target->free_reqs); } @@ -2159,6 +2159,9 @@ static int __init srp_init_module(void) { int ret; + BUILD_BUG_ON_NOT_POWER_OF_2(SRP_SQ_SIZE); + BUILD_BUG_ON_NOT_POWER_OF_2(SRP_RQ_SIZE); + if (srp_sg_tablesize > 255) { printk(KERN_WARNING PFX "Clamping srp_sg_tablesize to 255\n"); srp_sg_tablesize = 255; diff --git a/drivers/infiniband/ulp/srp/ib_srp.h b/drivers/infiniband/ulp/srp/ib_srp.h index 5a80eac6fda..7a959d5f2fa 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.h +++ b/drivers/infiniband/ulp/srp/ib_srp.h @@ -59,7 +59,14 @@ enum { SRP_RQ_SHIFT = 6, SRP_RQ_SIZE = 1 << SRP_RQ_SHIFT, - SRP_SQ_SIZE = SRP_RQ_SIZE - 1, + SRP_RQ_MASK = SRP_RQ_SIZE - 1, + + SRP_SQ_SIZE = SRP_RQ_SIZE, + SRP_SQ_MASK = SRP_SQ_SIZE - 1, + SRP_RSP_SQ_SIZE = 1, + SRP_REQ_SQ_SIZE = SRP_SQ_SIZE - SRP_RSP_SQ_SIZE, + SRP_TSK_MGMT_SQ_SIZE = 1, + SRP_CMD_SQ_SIZE = SRP_REQ_SQ_SIZE - SRP_TSK_MGMT_SQ_SIZE, SRP_TAG_TSK_MGMT = 1 << (SRP_RQ_SHIFT + 1), @@ -144,11 +151,11 @@ struct srp_target_port { unsigned tx_head; unsigned tx_tail; - struct srp_iu *tx_ring[SRP_SQ_SIZE + 1]; + struct srp_iu *tx_ring[SRP_SQ_SIZE]; struct list_head free_reqs; struct list_head req_queue; - struct srp_request req_ring[SRP_SQ_SIZE]; + struct srp_request req_ring[SRP_CMD_SQ_SIZE]; struct work_struct work; |