RDMA/bnxt_re: Reduce the delay in polling for hwrm command completion

Driver has 1ms delay between the polling for atomic command completion.
Polling immediately after issuing command usually doesn't report any
completions. So all commands in the blocking path needs two iterations. So
effectively 1ms spend on each command. HW requires much lesser time for
each command. So reduce the delay to 1us and increase the iteration count
to wait for the same time.

Link: https://lore.kernel.org/r/1631709163-2287-5-git-send-email-selvin.xavier@broadcom.com
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
index 5d384def5e5feaf569429cf731baf6bfc2338cc9..947e8c55c303588c83066b138e0045996b9acc30 100644 (file)
--- a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
@@ -78,7 +78,7 @@ static int __block_for_resp(struct bnxt_qplib_rcfw *rcfw, u16 cookie)
        if (!test_bit(cbit, cmdq->cmdq_bitmap))
                goto done;
        do {
-               mdelay(1); /* 1m sec */
+               udelay(1);
                bnxt_qplib_service_creq(&rcfw->creq.creq_tasklet);
        } while (test_bit(cbit, cmdq->cmdq_bitmap) && --count);
 done:

diff --git a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h
index 9474c00465821a6ff92caf5e41c7a4558cc7fe2b..82faa4e4cda84c29beb4ff97acf751424b627589 100644 (file)
--- a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h
+++ b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h
@@ -96,7 +96,7 @@ static inline void bnxt_qplib_set_cmd_slots(struct cmdq_base *req)
 
 #define RCFW_MAX_COOKIE_VALUE          0x7FFF
 #define RCFW_CMD_IS_BLOCKING           0x8000
-#define RCFW_BLOCKED_CMD_WAIT_COUNT    0x4E20
+#define RCFW_BLOCKED_CMD_WAIT_COUNT    20000000UL /* 20 sec */
 
 #define HWRM_VERSION_RCFW_CMDQ_DEPTH_CHECK 0x1000900020011ULL