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net/mlx4_core: Add Crdump FW snapshot support

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Crdump allows the driver to create a snapshot of the FW PCI
crspace and health buffer during a critical FW issue.
In case of a FW command timeout, FW getting stuck or a non zero
value on the catastrophic buffer, a snapshot will be taken.

The snapshot is exposed using devlink, cr-space, fw-health
address regions are registered on init and snapshots are attached
once a new snapshot is collected by the driver.

Signed-off-by: Alex Vesker <valex@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alex Vesker 2018-07-12 15:13:16 +03:00 • committed by David S. Miller
parent 523f9eb1ef
commit bedc989b0c
6 changed files with 255 additions and 4 deletions
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6
include/linux/mlx4/device.h
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@ -852,6 +852,11 @@ struct mlx4_vf_dev {
u8 n_ports;
};
struct mlx4_fw_crdump {
struct devlink_region *region_crspace;
struct devlink_region *region_fw_health;
};
enum mlx4_pci_status {
MLX4_PCI_STATUS_DISABLED,
MLX4_PCI_STATUS_ENABLED,
@ -872,6 +877,7 @@ struct mlx4_dev_persistent {
u8 interface_state;
struct mutex pci_status_mutex; /* sync pci state */
enum mlx4_pci_status pci_status;
struct mlx4_fw_crdump crdump;
};
struct mlx4_dev {