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| author |   Jacob Keller <jacob.e.keller@intel.com> | 2020-01-09 14:46:20 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-01-10 17:07:00 -0800 |
| commit | 0b0f945f54584621f4f91da701909f8e78c9eb69 (patch) | |
| tree | 0aee0eff76460c704084b0411f96d5185e1b4a7a /Documentation/networking/devlink/mlx4.rst | |
| parent | devlink: add a driver-specific file for the qed driver (diff) | |
| download | linux-dev-0b0f945f54584621f4f91da701909f8e78c9eb69.tar.xz linux-dev-0b0f945f54584621f4f91da701909f8e78c9eb69.zip | |
devlink: add a file documenting devlink regions
Also document the regions created by the mlx4 driver. This is currently
the only in-tree driver that creates devlink region snapshots.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Cc: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | Documentation/networking/devlink/mlx4.rst | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/networking/devlink/mlx4.rst b/Documentation/networking/devlink/mlx4.rst index 4fa5c2b51c52..7b2d17ea5471 100644 --- a/Documentation/networking/devlink/mlx4.rst +++ b/Documentation/networking/devlink/mlx4.rst @@ -41,3 +41,16 @@ parameters. - Enable using the 4k UAR. The ``mlx4`` driver supports reloading via ``DEVLINK_CMD_RELOAD`` + +Regions +======= + +The ``mlx4`` driver supports dumping the firmware PCI crspace and health +buffer during a critical firmware issue. + +In case a firmware command times out, firmware getting stuck, or a non zero +value on the catastrophic buffer, a snapshot will be taken by the driver. + +The ``cr-space`` region will contain the firmware PCI crspace contents. The +``fw-health`` region will contain the device firmware's health buffer. +Snapshots for both of these regions are taken on the same event triggers. |