diff options
| author | Kashyap Desai <kashyap.desai@broadcom.com> | 2023-06-09 14:01:49 +0300 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2023-06-12 10:10:17 +0300 |
| commit | 84911cf3b2aa8d0a1e563d346c852131582cb871 (patch) | |
| tree | 355339ecdd38d9f67846d08b11ae0e642101e7dd /drivers/infiniband/hw/bnxt_re/qplib_rcfw.h | |
| parent | b6c7256688264f5096a2cfaaaa56d01ea686b367 (diff) | |
| download | linux-84911cf3b2aa8d0a1e563d346c852131582cb871.tar.xz | |
RDMA/bnxt_re: post destroy_ah for delayed completion of AH creation
AH create may be called from interrpt context and driver has a special
timeout (8 sec) for this command. This is to avoid soft lockups when
the FW command takes more time. Driver returns -ETIMEOUT and fail
create AH, without waiting for actual completion from firmware.
When FW completion is received, use is_waiter_alive flag to avoid
a regular completion path.
If create_ah opcode is detected in completion path which does not have
waiter alive, driver will fetch ah_id from successful firmware
completion in the interrupt context and sends destroy_ah command
for same ah_id. This special post is done in quick manner using helper
function __send_message_no_waiter.
timeout_send is only used for debugging purposes.
If timeout_send value keeps incrementing, it indicates out of sync
active ah counter between driver and firmware. This is a limitation
but graceful handling is possible in future.
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://lore.kernel.org/r/1686308514-11996-13-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'drivers/infiniband/hw/bnxt_re/qplib_rcfw.h')
| -rw-r--r-- | drivers/infiniband/hw/bnxt_re/qplib_rcfw.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h index 54576f12c8da..338bf6a9699f 100644 --- a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h +++ b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h @@ -153,6 +153,7 @@ struct bnxt_qplib_crsqe { /* Free slots at the time of submission */ u32 free_slots; bool is_waiter_alive; + bool is_internal_cmd; }; struct bnxt_qplib_rcfw_sbuf { @@ -225,6 +226,7 @@ struct bnxt_qplib_rcfw { u32 cmdq_depth; atomic_t rcfw_intr_enabled; struct semaphore rcfw_inflight; + atomic_t timeout_send; }; struct bnxt_qplib_cmdqmsg { |