diff options
| author | Vipul Pandya <vipul@chelsio.com> | 2013-03-14 06:09:00 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-14 16:35:58 +0100 |
| commit | 80ccdd60512fc19fa87bf02876c59aeeb82fe4bc (patch) | |
| tree | 1121801ace06f0c4821fcd1a619032cb9540cbee /drivers/infiniband/hw/cxgb4/device.c | |
| parent | RDMA/cxgb4: Turn off db coalescing when RDMA QPs are in use. (diff) | |
| download | linux-80ccdd60512fc19fa87bf02876c59aeeb82fe4bc.tar.xz linux-80ccdd60512fc19fa87bf02876c59aeeb82fe4bc.zip | |
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>
Diffstat (limited to 'drivers/infiniband/hw/cxgb4/device.c')
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/device.c | 25 |
1 files changed, 23 insertions, 2 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"); |