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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>
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parent
3cbdb928e2
commit
80ccdd6051
3 changed files with 30 additions and 6 deletions
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@ -45,6 +45,16 @@ MODULE_DESCRIPTION("Chelsio T4/T5 RDMA Driver");
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_VERSION(DRV_VERSION);
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static int allow_db_fc_on_t5;
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module_param(allow_db_fc_on_t5, int, 0644);
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MODULE_PARM_DESC(allow_db_fc_on_t5,
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"Allow DB Flow Control on T5 (default = 0)");
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static int allow_db_coalescing_on_t5;
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module_param(allow_db_coalescing_on_t5, int, 0644);
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MODULE_PARM_DESC(allow_db_coalescing_on_t5,
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"Allow DB Coalescing on T5 (default = 0)");
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struct uld_ctx {
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struct list_head entry;
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struct cxgb4_lld_info lldi;
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@ -630,8 +640,19 @@ static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop)
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if (!ocqp_supported(infop))
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pr_info("%s: On-Chip Queues not supported on this device.\n",
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pci_name(infop->pdev));
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if (!is_t4(infop->adapter_type))
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db_fc_threshold = 100000;
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if (!is_t4(infop->adapter_type)) {
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if (!allow_db_fc_on_t5) {
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db_fc_threshold = 100000;
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pr_info("DB Flow Control Disabled.\n");
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}
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if (!allow_db_coalescing_on_t5) {
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db_coalescing_threshold = -1;
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pr_info("DB Coalescing Disabled.\n");
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}
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}
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devp = (struct c4iw_dev *)ib_alloc_device(sizeof(*devp));
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if (!devp) {
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printk(KERN_ERR MOD "Cannot allocate ib device\n");
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@ -939,6 +939,7 @@ extern struct cxgb4_client t4c_client;
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extern c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS];
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extern int c4iw_max_read_depth;
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extern int db_fc_threshold;
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extern int db_coalescing_threshold;
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#endif
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@ -1455,8 +1455,9 @@ int c4iw_destroy_qp(struct ib_qp *ib_qp)
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rhp->db_state = NORMAL;
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idr_for_each(&rhp->qpidr, enable_qp_db, NULL);
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}
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if (rhp->qpcnt <= db_coalescing_threshold)
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cxgb4_enable_db_coalescing(rhp->rdev.lldi.ports[0]);
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if (db_coalescing_threshold >= 0)
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if (rhp->qpcnt <= db_coalescing_threshold)
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cxgb4_enable_db_coalescing(rhp->rdev.lldi.ports[0]);
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spin_unlock_irq(&rhp->lock);
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atomic_dec(&qhp->refcnt);
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wait_event(qhp->wait, !atomic_read(&qhp->refcnt));
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@ -1574,8 +1575,9 @@ struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs,
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rhp->db_state = FLOW_CONTROL;
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idr_for_each(&rhp->qpidr, disable_qp_db, NULL);
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}
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if (rhp->qpcnt > db_coalescing_threshold)
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cxgb4_disable_db_coalescing(rhp->rdev.lldi.ports[0]);
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if (db_coalescing_threshold >= 0)
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if (rhp->qpcnt > db_coalescing_threshold)
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cxgb4_disable_db_coalescing(rhp->rdev.lldi.ports[0]);
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ret = insert_handle_nolock(rhp, &rhp->qpidr, qhp, qhp->wq.sq.qid);
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spin_unlock_irq(&rhp->lock);
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if (ret)
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