diff options
author | Mitesh Ahuja <mitesh.ahuja@emulex.com> | 2014-12-18 14:13:05 +0530 |
---|---|---|
committer | Roland Dreier <roland@purestorage.com> | 2015-02-18 08:31:04 -0800 |
commit | b4dbe8d52d08e5ed60c9d01efbcd7b8694cf4b9f (patch) | |
tree | 0b76375dc4c59382a3b2126304f93bc24efe50d7 /drivers/infiniband/hw/ocrdma/ocrdma_hw.c | |
parent | a601dc77f8bf71818d679cbd97e953becb2a085e (diff) |
RDMA/ocrdma: Add support for interrupt moderation
Add support for interrupt moderation for ocrdma device. Thresholds
for high interrupt rates are static values derived based on experimental
results.
Signed-off-by: Mitesh Ahuja <mitesh.ahuja@emulex.com>
Signed-off-by: Devesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: Selvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw/ocrdma/ocrdma_hw.c')
-rw-r--r-- | drivers/infiniband/hw/ocrdma/ocrdma_hw.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c index 6e9680d18934..189ebc7c20af 100644 --- a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c +++ b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c @@ -960,6 +960,7 @@ static irqreturn_t ocrdma_irq_handler(int irq, void *handle) } while (budget); + eq->aic_obj.eq_intr_cnt++; ocrdma_ring_eq_db(dev, eq->q.id, true, true, 0); return IRQ_HANDLED; } @@ -3016,6 +3017,82 @@ done: return status; } +static int ocrdma_mbx_modify_eqd(struct ocrdma_dev *dev, struct ocrdma_eq *eq, + int num) +{ + int i, status = -ENOMEM; + struct ocrdma_modify_eqd_req *cmd; + + cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_MODIFY_EQ_DELAY, sizeof(*cmd)); + if (!cmd) + return status; + + ocrdma_init_mch(&cmd->cmd.req, OCRDMA_CMD_MODIFY_EQ_DELAY, + OCRDMA_SUBSYS_COMMON, sizeof(*cmd)); + + cmd->cmd.num_eq = num; + for (i = 0; i < num; i++) { + cmd->cmd.set_eqd[i].eq_id = eq[i].q.id; + cmd->cmd.set_eqd[i].phase = 0; + cmd->cmd.set_eqd[i].delay_multiplier = + (eq[i].aic_obj.prev_eqd * 65)/100; + } + status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd); + if (status) + goto mbx_err; +mbx_err: + kfree(cmd); + return status; +} + +static int ocrdma_modify_eqd(struct ocrdma_dev *dev, struct ocrdma_eq *eq, + int num) +{ + int num_eqs, i = 0; + if (num > 8) { + while (num) { + num_eqs = min(num, 8); + ocrdma_mbx_modify_eqd(dev, &eq[i], num_eqs); + i += num_eqs; + num -= num_eqs; + } + } else { + ocrdma_mbx_modify_eqd(dev, eq, num); + } + return 0; +} + +void ocrdma_eqd_set_task(struct work_struct *work) +{ + struct ocrdma_dev *dev = + container_of(work, struct ocrdma_dev, eqd_work.work); + struct ocrdma_eq *eq = 0; + int i, num = 0, status = -EINVAL; + u64 eq_intr; + + for (i = 0; i < dev->eq_cnt; i++) { + eq = &dev->eq_tbl[i]; + if (eq->aic_obj.eq_intr_cnt > eq->aic_obj.prev_eq_intr_cnt) { + eq_intr = eq->aic_obj.eq_intr_cnt - + eq->aic_obj.prev_eq_intr_cnt; + if ((eq_intr > EQ_INTR_PER_SEC_THRSH_HI) && + (eq->aic_obj.prev_eqd == EQ_AIC_MIN_EQD)) { + eq->aic_obj.prev_eqd = EQ_AIC_MAX_EQD; + num++; + } else if ((eq_intr < EQ_INTR_PER_SEC_THRSH_LOW) && + (eq->aic_obj.prev_eqd == EQ_AIC_MAX_EQD)) { + eq->aic_obj.prev_eqd = EQ_AIC_MIN_EQD; + num++; + } + } + eq->aic_obj.prev_eq_intr_cnt = eq->aic_obj.eq_intr_cnt; + } + + if (num) + status = ocrdma_modify_eqd(dev, &dev->eq_tbl[0], num); + schedule_delayed_work(&dev->eqd_work, msecs_to_jiffies(1000)); +} + int ocrdma_init_hw(struct ocrdma_dev *dev) { int status; |