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Commit 9b1f2982 authored by Moshe Shemesh's avatar Moshe Shemesh Committed by Saeed Mahameed
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net/mlx5: Add support for FW fatal reporter dump 



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: default avatarMoshe Shemesh <moshe@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
parent 96c82cdf

drivers/net/ethernet/mellanox/mlx5/core/health.c

+50 −0
Original line number Diff line number Diff line
@@ -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