diff options
| author | Vipul Pandya <vipul@chelsio.com> | 2013-03-14 05:09:00 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-14 11:35:58 -0400 |
| commit | 80ccdd60512fc19fa87bf02876c59aeeb82fe4bc (patch) | |
| tree | 1121801ace06f0c4821fcd1a619032cb9540cbee | |
| parent | 3cbdb928e2ddd16649769c8597a3ebc06c7594fd (diff) | |
RDMA/cxgb4: Add module_params to enable DB FC & Coalescing on T5
Both DB Flow-Control and DB Coalescing are disabled by default on T5
Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/device.c | 25 | ||||
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/iw_cxgb4.h | 1 | ||||
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/qp.c | 10 |
3 files changed, 30 insertions, 6 deletions
diff --git a/drivers/infiniband/hw/cxgb4/device.c b/drivers/infiniband/hw/cxgb4/device.c index 3487c08828f7..ae656016e1ae 100644 --- a/drivers/infiniband/hw/cxgb4/device.c +++ b/drivers/infiniband/hw/cxgb4/device.c @@ -45,6 +45,16 @@ MODULE_DESCRIPTION("Chelsio T4/T5 RDMA Driver"); MODULE_LICENSE("Dual BSD/GPL"); MODULE_VERSION(DRV_VERSION); +static int allow_db_fc_on_t5; +module_param(allow_db_fc_on_t5, int, 0644); +MODULE_PARM_DESC(allow_db_fc_on_t5, + "Allow DB Flow Control on T5 (default = 0)"); + +static int allow_db_coalescing_on_t5; +module_param(allow_db_coalescing_on_t5, int, 0644); +MODULE_PARM_DESC(allow_db_coalescing_on_t5, + "Allow DB Coalescing on T5 (default = 0)"); + struct uld_ctx { struct list_head entry; struct cxgb4_lld_info lldi; @@ -630,8 +640,19 @@ static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop) if (!ocqp_supported(infop)) pr_info("%s: On-Chip Queues not supported on this device.\n", pci_name(infop->pdev)); - if (!is_t4(infop->adapter_type)) - db_fc_threshold = 100000; + + if (!is_t4(infop->adapter_type)) { + if (!allow_db_fc_on_t5) { + db_fc_threshold = 100000; + pr_info("DB Flow Control Disabled.\n"); + } + + if (!allow_db_coalescing_on_t5) { + db_coalescing_threshold = -1; + pr_info("DB Coalescing Disabled.\n"); + } + } + devp = (struct c4iw_dev *)ib_alloc_device(sizeof(*devp)); if (!devp) { printk(KERN_ERR MOD "Cannot allocate ib device\n"); diff --git a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h index 34c7e62b8676..4dbe96a06a84 100644 --- a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h +++ b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h @@ -939,6 +939,7 @@ extern struct cxgb4_client t4c_client; extern c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS]; extern int c4iw_max_read_depth; extern int db_fc_threshold; +extern int db_coalescing_threshold; #endif diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c index da4869f41e35..28592d45809b 100644 --- a/drivers/infiniband/hw/cxgb4/qp.c +++ b/drivers/infiniband/hw/cxgb4/qp.c @@ -1455,8 +1455,9 @@ int c4iw_destroy_qp(struct ib_qp *ib_qp) rhp->db_state = NORMAL; idr_for_each(&rhp->qpidr, enable_qp_db, NULL); } - if (rhp->qpcnt <= db_coalescing_threshold) - cxgb4_enable_db_coalescing(rhp->rdev.lldi.ports[0]); + if (db_coalescing_threshold >= 0) + if (rhp->qpcnt <= db_coalescing_threshold) + cxgb4_enable_db_coalescing(rhp->rdev.lldi.ports[0]); spin_unlock_irq(&rhp->lock); atomic_dec(&qhp->refcnt); wait_event(qhp->wait, !atomic_read(&qhp->refcnt)); @@ -1574,8 +1575,9 @@ struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs, rhp->db_state = FLOW_CONTROL; idr_for_each(&rhp->qpidr, disable_qp_db, NULL); } - if (rhp->qpcnt > db_coalescing_threshold) - cxgb4_disable_db_coalescing(rhp->rdev.lldi.ports[0]); + if (db_coalescing_threshold >= 0) + if (rhp->qpcnt > db_coalescing_threshold) + cxgb4_disable_db_coalescing(rhp->rdev.lldi.ports[0]); ret = insert_handle_nolock(rhp, &rhp->qpidr, qhp, qhp->wq.sq.qid); spin_unlock_irq(&rhp->lock); if (ret) |