leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

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

Browse Source 
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>
This commit is contained in:
Selvin Xavier 2021-09-15 05:32:35 -07:00 committed by Jason Gunthorpe
parent 403bc4359a
commit b9b43ad3ce
2 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
View File

@ -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:

2
drivers/infiniband/hw/bnxt_re/qplib_rcfw.h
View File

@ -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