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net/mlx5: Add support for FW fatal reporter dump

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Add support of dump callback for mlx5 FW fatal reporter.
The FW fatal dump uses cr-dump functionality to gather cr-space data for
debug. The cr-dump uses vsc interface which is valid even if the FW
command interface is not functional, which is the case in most FW fatal
errors.

Command example and output:
$ devlink health dump show pci/0000:82:00.0 reporter fw_fatal
 crdump_data:
  00 20 00 01 00 00 00 00 03 00 00 00 00 00 00 00
  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80
  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  00 00 00 00 00 00 00 00 00 00 00 00 ba 82 00 00
  0c 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20
  00 00 00 00 00 00 00 00 00 00 00 00 00 00 fa 00
  a4 0e 00 00 00 00 00 00 80 c7 fe ff 50 0a 00 00
...
...

Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Moshe Shemesh 2019-01-16 13:23:25 +02:00 committed by Saeed Mahameed
parent 96c82cdfe7
commit 9b1f298236
1 changed files with 50 additions and 0 deletions
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50
drivers/net/ethernet/mellanox/mlx5/core/health.c
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@ -565,9 +565,59 @@ mlx5_fw_fatal_reporter_recover(struct devlink_health_reporter *reporter,
return mlx5_health_try_recover(dev);
}
#define MLX5_CR_DUMP_CHUNK_SIZE 256
static int
mlx5_fw_fatal_reporter_dump(struct devlink_health_reporter *reporter,
struct devlink_fmsg *fmsg, void *priv_ctx)
{
struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter);
u32 crdump_size = dev->priv.health.crdump_size;
u32 *cr_data;
u32 data_size;
u32 offset;
int err;
if (!mlx5_core_is_pf(dev))
return -EPERM;
cr_data = kvmalloc(crdump_size, GFP_KERNEL);
if (!cr_data)
return -ENOMEM;
err = mlx5_crdump_collect(dev, cr_data);
if (err)
return err;
if (priv_ctx) {
struct mlx5_fw_reporter_ctx *fw_reporter_ctx = priv_ctx;
err = mlx5_fw_reporter_ctx_pairs_put(fmsg, fw_reporter_ctx);
if (err)
goto free_data;
}
err = devlink_fmsg_arr_pair_nest_start(fmsg, "crdump_data");
if (err)
goto free_data;
for (offset = 0; offset < crdump_size; offset += data_size) {
if (crdump_size - offset < MLX5_CR_DUMP_CHUNK_SIZE)
data_size = crdump_size - offset;
else
data_size = MLX5_CR_DUMP_CHUNK_SIZE;
err = devlink_fmsg_binary_put(fmsg, cr_data, data_size);
if (err)
goto free_data;
}
err = devlink_fmsg_arr_pair_nest_end(fmsg);
free_data:
kfree(cr_data);
return err;
}
static const struct devlink_health_reporter_ops mlx5_fw_fatal_reporter_ops = {
.name = "fw_fatal",
.recover = mlx5_fw_fatal_reporter_recover,
.dump = mlx5_fw_fatal_reporter_dump,
};
#define MLX5_REPORTER_FW_GRACEFUL_PERIOD 1200000