net/mlx5: Add device cap for supporting hot reset in sync reset flow

New devices with new FW can support sync reset for firmware activate
using hot reset. Add capability for supporting it and add MFRL field to
query from FW which type of PCI reset method to use while handling sync
reset events.

Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20240911201757.1505453-10-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index 2045575b70d4c9050ccd80a4f435c07f0c17577f..620a5c305123bb0298e0f17d4a4f43cd135eb634 100644 (file)
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -1856,7 +1856,8 @@ struct mlx5_ifc_cmd_hca_cap_bits {
        u8         reserved_at_328[0x2];
        u8         relaxed_ordering_read[0x1];
        u8         log_max_pd[0x5];
-       u8         reserved_at_330[0x6];
+       u8         reserved_at_330[0x5];
+       u8         pcie_reset_using_hotreset_method[0x1];
        u8         pci_sync_for_fw_update_with_driver_unload[0x1];
        u8         vnic_env_cnt_steering_fail[0x1];
        u8         vport_counter_local_loopback[0x1];
@@ -11188,6 +11189,11 @@ struct mlx5_ifc_mcda_reg_bits {
        u8         data[][0x20];
 };
 
+enum {
+       MLX5_MFRL_REG_PCI_RESET_METHOD_LINK_TOGGLE = 0,
+       MLX5_MFRL_REG_PCI_RESET_METHOD_HOT_RESET = 1,
+};
+
 enum {
        MLX5_MFRL_REG_RESET_STATE_IDLE = 0,
        MLX5_MFRL_REG_RESET_STATE_IN_NEGOTIATION = 1,
@@ -11215,7 +11221,8 @@ struct mlx5_ifc_mfrl_reg_bits {
        u8         pci_sync_for_fw_update_start[0x1];
        u8         pci_sync_for_fw_update_resp[0x2];
        u8         rst_type_sel[0x3];
-       u8         reserved_at_28[0x4];
+       u8         pci_reset_req_method[0x3];
+       u8         reserved_at_2b[0x1];
        u8         reset_state[0x4];
        u8         reset_type[0x8];
        u8         reset_level[0x8];