If bnxt_re_add_device() fails, 'en_info' still needs to be freed, as
already done in the .remove() function.
The commit in Fixes incorrectly removed this call, certainly because it
was expecting the .remove() function was called anyway. But if the probe
fails, the remove function is not called.
There is no need to call bnxt_re_remove() as it was done before, kfree()
is enough.
Fixes: a5e099e0c4 ("RDMA/bnxt_re: Fix an error path in bnxt_re_add_device")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://patch.msgid.link/9e48ff955ae55fc39a9eb1eb590d374539eab5ba.1730477345.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Currently the CQ toggle value in the shared page (read by the userlib) is
updated as part of the cqn_handler. There is a potential race of
application calling the CQ ARM doorbell immediately and using the old
toggle value.
Change the sequence of updating CQ toggle value to update in the
bnxt_qplib_service_nq function immediately after reading the toggle value
to be in sync with the HW updated value.
Fixes: e275919d96 ("RDMA/bnxt_re: Share a page to expose per CQ info with userspace")
Link: https://patch.msgid.link/r/1728373302-19530-9-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Reviewed-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
In bnxt_re_add_device(), when register netdev notifier fails, driver is
not unregistering the IB device in the error cleanup path. Also, removed
the duplicate cleanup in error path of bnxt_re_probe.
Fixes: 94a9dc6ac8 ("RDMA/bnxt_re: Group all operations under add_device and remove_device")
Link: https://patch.msgid.link/r/1728373302-19530-8-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Driver waits indefinitely for the fifo occupancy to go below a threshold
as soon as the pacing interrupt is received. This can cause soft lockup on
one of the processors, if the rate of DB is very high.
Add a loop count for FPGA and exit the __wait_for_fifo_occupancy_below_th
if the loop is taking more time. Pacing will be continuing until the
occupancy is below the threshold. This is ensured by the checks in
bnxt_re_pacing_timer_exp and further scheduling the work for pacing based
on the fifo occupancy.
Fixes: 2ad4e6303a ("RDMA/bnxt_re: Implement doorbell pacing algorithm")
Link: https://patch.msgid.link/r/1728373302-19530-7-git-send-email-selvin.xavier@broadcom.com
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Currently driver is not getting correct srq. Dereference only if qplib has
a valid srq.
Fixes: b02fd3f79e ("RDMA/bnxt_re: Report async events and errors")
Link: https://patch.msgid.link/r/1728373302-19530-4-git-send-email-selvin.xavier@broadcom.com
Reviewed-by: Saravanan Vajravel <saravanan.vajravel@broadcom.com>
Reviewed-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
In bnxt_re_setup_chip_ctx() when bnxt_qplib_map_db_bar() fails
driver is not freeing the memory allocated for "rdev->chip_ctx".
Fixes: 0ac20faf5d ("RDMA/bnxt_re: Reorg the bar mapping")
Link: https://patch.msgid.link/r/1726715161-18941-2-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
If the FW crashes, L2 driver gets notified and it notifies
the RoCE driver. Currently driver doesn't re-initialize the
device. Add support for re-initialize the RoCE device.
RoCE device is removed and re-attached in the ulp_stop and
ulp_start respectively. The recovery logic expects the RoCE
driver to be registered with L2 driver while its being removed.
So the driver avoids unregistering with L2 driver in the
recovery path.
Signed-off-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://patch.msgid.link/1726027710-2292-5-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Adding and removing device need to be handled from multiple contexts
when Firmware error recovery is supported. So group all the add and remove
operations to add_device and remove_device function.
Signed-off-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://patch.msgid.link/1726027710-2292-4-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
While registering with the L2 for ULP operations, use the
aux device pointer as the handle. Aux device has
the data bnxt_re_en_dev_info, which is used to
store required information for the bnxt_re_suspend
and bnxt_re_resume functions.
Signed-off-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://patch.msgid.link/1726027710-2292-3-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
rdev will be destroyed and recreated during the FW error
recovery scenarios. So to keep the state, if any, use an
en_info structure which gets created/freed based on auxiliary
device initialization/de-initialization.
Signed-off-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Reviewed-by: Kashyap Desai <kashyap.desai@broadcom.com>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://patch.msgid.link/1726027710-2292-2-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Gen P7 adapters needs to share a toggle bits information received
in kernel driver with the user space. User space needs this
info to arm the SRQ.
User space application can get this page using the
UAPI routines. Library will mmap this page and get the
toggle bits to be used in the next ARM Doorbell.
Uses a hash list to map the SRQ structure from the SRQ ID.
SRQ structure is retrieved from the hash list while the
library calls the UAPI routine to get the toggle page
mapping. Currently the full page is mapped per SRQ. This
can be optimized to enable multiple SRQs from the same
application share the same page and different offsets
in the page
Signed-off-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://patch.msgid.link/1724945645-14989-4-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Variable size WQE means that each send Work Queue Entry to HW can use
different WQE sizes as opposed to the static WQE size on the current
devices. Set variable WQE mode for Gen P7 devices. Depth of the Queue will
be a multiple of slot which is 16 bytes. The number of slots should be a
multiple of 256 as per the HW requirement.
Initialize the Software shadow queue to hold requests equal to the number
of slots. Also, do not expose the variable size WQE capability until the
last patch in the series.
Link: https://patch.msgid.link/r/1724042847-1481-2-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Hongguang Gao <hongguang.gao@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
If the HW register read fails, the FIFO will be always shown as
full. DB moderation doesn't work in that case and the traffic fails.
So disable this feature and log a message.
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://lore.kernel.org/r/1719456065-27394-4-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Enable DB moderation support for GenP7 adapters also. Query from FW
and update the status.
Signed-off-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://lore.kernel.org/r/1719456065-27394-3-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
GenP5 and P7 devices have different DB FIFO depth. Use different
values based on the chip context.
Instead of hardcoding doorbell FIFO related values, get it
from the HWRM interface. Maintain backward compatibility
by having default values when FW is not providing the doorbell
FIFO related values.
Signed-off-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://lore.kernel.org/r/1719456065-27394-2-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
After the cited commit, there is no possibility that this check
can return true. Remove it.
Fixes: a43c26fa2e ("RDMA/bnxt_re: Remove the sriov config callback")
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://lore.kernel.org/r/1705985677-15551-3-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
User Doorbell page indexes start at an offset for GenP7 adapters.
Fix the offset that will be used for user doorbell page indexes.
Fixes: a62d685814 ("RDMA/bnxt_re: Update the BAR offsets")
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://lore.kernel.org/r/1702987900-5363-1-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Gen P7 adapters needs to share a toggle bits information received
in kernel driver with the user space. User space needs this
info during the request notify call back to arm the CQ.
User space application can get this page using the
UAPI routines. Library will mmap this page and get the
toggle bits to be used in the next ARM Doorbell.
Uses a hash list to map the CQ structure from the CQ ID.
CQ structure is retrieved from the hash list while the
library calls the UAPI routine to get the toggle page
mapping. Currently the full page is mapped per CQ. This
can be optimized to enable multiple CQs from the same
application share the same page and different offsets
in the page.
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://lore.kernel.org/r/1702535484-26844-3-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
These two series from Mark and Shun extend RDMA mlx5 API.
Mark's series provides c0 register used to match egress
traffic sent by local device.
Shun's series adds new type for ICM area.
Link: https://lore.kernel.org/all/cover.1701871118.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Add basic support for 5760X P7 devices. Add new chip
revisions. The first version support is similar to
the existing P5 adapters. Extend the current support
for P5 adapters to P7 also.
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://lore.kernel.org/r/1701946060-13931-2-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
The word "Driver" is repeated twice in the "modinfo bnxt_re"
output description. Fix it.
Fixes: 1ac5a40479 ("RDMA/bnxt_re: Add bnxt_re RoCE driver")
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://lore.kernel.org/r/1700555387-6277-1-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Clang warns (or errors with CONFIG_WERROR=y):
drivers/infiniband/hw/bnxt_re/main.c:1114:2: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
1114 | default:
| ^
drivers/infiniband/hw/bnxt_re/main.c:1114:2: note: insert 'break;' to avoid fall-through
1114 | default:
| ^
| break;
1 error generated.
Clang is a little more pedantic than GCC, which does not warn when
falling through to a case that is just break or return. Clang's version
is more in line with the kernel's own stance in deprecated.rst, which
states that all switch/case blocks must end in either break,
fallthrough, continue, goto, or return. Add the missing break to silence
the warning.
Closes: https://github.com/ClangBuiltLinux/linux/issues/1950
Fixes: b02fd3f79e ("RDMA/bnxt_re: Report async events and errors")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20231020-bnxt_re-implicit-fallthrough-v1-1-b5c19534a6c9@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
In the SRQ notification handler, do not report the SRQ_ERROR
in the default event case, as there was no error.
Signed-off-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://lore.kernel.org/r/1697049097-31992-4-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Many small changes across the subystem, some highlights:
- Usual driver cleanups in qedr, siw, erdma, hfi1, mlx4/5, irdma, mthca,
hns, and bnxt_re
- siw now works over tunnel and other netdevs with a MAC address by
removing assumptions about a MAC/GID from the connection manager
- "Doorbell Pacing" for bnxt_re - this is a best effort scheme to allow
userspace to slow down the doorbell rings if the HW gets full
- irdma egress VLAN priority, better QP/WQ sizing
- rxe bug fixes in queue draining and srq resizing
- Support more ethernet speed options in the core layer
- DMABUF support for bnxt_re
- Multi-stage MTT support for erdma to allow much bigger MR registrations
- A irdma fix with a CVE that came in too late to go to -rc, missing
bounds checking for 0 length MRs
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Pull rdma updates from Jason Gunthorpe:
"Many small changes across the subystem, some highlights:
- Usual driver cleanups in qedr, siw, erdma, hfi1, mlx4/5, irdma,
mthca, hns, and bnxt_re
- siw now works over tunnel and other netdevs with a MAC address by
removing assumptions about a MAC/GID from the connection manager
- "Doorbell Pacing" for bnxt_re - this is a best effort scheme to
allow userspace to slow down the doorbell rings if the HW gets full
- irdma egress VLAN priority, better QP/WQ sizing
- rxe bug fixes in queue draining and srq resizing
- Support more ethernet speed options in the core layer
- DMABUF support for bnxt_re
- Multi-stage MTT support for erdma to allow much bigger MR
registrations
- A irdma fix with a CVE that came in too late to go to -rc, missing
bounds checking for 0 length MRs"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (87 commits)
IB/hfi1: Reduce printing of errors during driver shut down
RDMA/hfi1: Move user SDMA system memory pinning code to its own file
RDMA/hfi1: Use list_for_each_entry() helper
RDMA/mlx5: Fix trailing */ formatting in block comment
RDMA/rxe: Fix redundant break statement in switch-case.
RDMA/efa: Fix wrong resources deallocation order
RDMA/siw: Call llist_reverse_order in siw_run_sq
RDMA/siw: Correct wrong debug message
RDMA/siw: Balance the reference of cep->kref in the error path
Revert "IB/isert: Fix incorrect release of isert connection"
RDMA/bnxt_re: Fix kernel doc errors
RDMA/irdma: Prevent zero-length STAG registration
RDMA/erdma: Implement hierarchical MTT
RDMA/erdma: Refactor the storage structure of MTT entries
RDMA/erdma: Renaming variable names and field names of struct erdma_mem
RDMA/hns: Support hns HW stats
RDMA/hns: Dump whole QP/CQ/MR resource in raw
RDMA/irdma: Add missing kernel-doc in irdma_setup_umode_qp()
RDMA/mlx4: Copy union directly
RDMA/irdma: Drop unused kernel push code
...
Support the new verb which indicates dmabuf support. bnxt doesn't support
ODP. So use the pinned version of the dmabuf APIs to enable bnxt_re
devices to work as dmabuf importer.
Link: https://lore.kernel.org/r/1690790473-25850-2-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Saravanan Vajravel <saravanan.vajravel@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
During bnxt_re_dev_init(), when bnxt_re_setup_chip_ctx() fails unregister
with L2 first before bailing out probe.
Fixes: ae8637e131 ("RDMA/bnxt_re: Add chip context to identify 57500 series")
Link: https://lore.kernel.org/r/1691642677-21369-3-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Driver has not accounted QP1 for virtual functions
when fetching device attributes and hence max_qp
count is one less than active_qp count. Fixed driver
so that it counts QP1 for virtual functions as well
while fetching device attributes
Fixes: ccd9d0d3df ("RDMA/bnxt_re: Enable RoCE on virtual functions")
Signed-off-by: Saravanan Vajravel <saravanan.vajravel@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://lore.kernel.org/r/1691052326-32143-2-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
There are a little ternary operators, the true or false judgment
of which is unnecessary in C language semantics.
Signed-off-by: Ruan Jinjie <ruanjinjie@huawei.com>
Link: https://lore.kernel.org/r/20230731085118.394443-1-ruanjinjie@huawei.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
User applications alert the driver when the Doorbell FIFO
reaches the alarm threshold. The driver updates the pacing
parameters in the shared page to do the maximum pacing
by the application till the DB FIFO congestion reduces to
pacing threshold. Driver keeps checking the DB FIFO depth
at the pacing interval and gradually adjusts the pacing level.
Once the pacing level reaches default values (no congestion in
the FIFO) pacing gets completed.
Link: https://lore.kernel.org/r/1689742977-9128-7-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Checks for pacing feature capability and get the doorbell pacing
configuration using FW commands. Allocate a page and initialize
the pacing parameters for the applications. Cleanup the page and
de-initialize the pacing during device removal.
Link: https://lore.kernel.org/r/1689742977-9128-4-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
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Merge tag 'v6.4' into rdma.git for-next
Linux 6.4
Resolve conflicts between rdma rc and next in rxe_cq matching linux-next:
drivers/infiniband/sw/rxe/rxe_cq.c:
https://lore.kernel.org/r/20230622115246.365d30ad@canb.auug.org.au
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Introduce driver specific uapi functionalites. Added a alloc_page
functionality for user library to allocate specific pages. Currently added
support for allocating write combine pages for push functinality. This
interface shall be extended for other page allocations.
Allocate a WC page using the uapi hook for enabling the low latency push
in Gen P5 adapters for small packets. This is supported only for the user
space QPs.
Link: https://lore.kernel.org/r/1686679943-17117-8-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reorganize the code for allocation and mapping of Doorbell
pages. Implements new HW command to get the BAR length used by L2
driver. These changes are used by the future patch which maps the WC
Doorbell pages.
Also, introduced a new lock dpi_tbl_lock for synchronize the DB page
allocation from users.
Link: https://lore.kernel.org/r/1686679943-17117-7-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
As of now bnxt_re_init_hwrm_hdr is taking only the opcode from the
caller. compl_ring and target_id field is always -1. These fields might be
changed when newer features are added. For now, removing these parameters
as they are hard coded. Also, remove the rdev field which is not used.
Also, initialize the structure bnxt_fw_msg during declaration itself.
Link: https://lore.kernel.org/r/1686679943-17117-4-git-send-email-selvin.xavier@broadcom.com
Suggested-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Add driver disassociation support. Driver uses the APIs rdma_user_mmap_io
api while mapping the IO pages to user space. Add empty stub for
disassociate ucontext.
Link: https://lore.kernel.org/r/1686679943-17117-3-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
