net/mlx5: Add NOT_READY command return status

Add a new command status MLX5_CMD_STAT_NOT_READY to handle cases
where the firmware is not ready.
Signed-off-by: Shay Drory <shayd@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Link: https://patch.msgid.link/20240911201757.1505453-14-saeed@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

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

@@ -754,6 +754,8 @@ static const char *cmd_status_str(u8 status)
 		return "bad resource";
 	case MLX5_CMD_STAT_RES_BUSY:
 		return "resource busy";
+	case MLX5_CMD_STAT_NOT_READY:
+		return "FW not ready";
 	case MLX5_CMD_STAT_LIM_ERR:
 		return "limits exceeded";
 	case MLX5_CMD_STAT_BAD_RES_STATE_ERR:
@@ -787,6 +789,7 @@ static int cmd_status_to_err(u8 status)
 	case MLX5_CMD_STAT_BAD_SYS_STATE_ERR:		return -EIO;
 	case MLX5_CMD_STAT_BAD_RES_ERR:			return -EINVAL;
 	case MLX5_CMD_STAT_RES_BUSY:			return -EBUSY;
+	case MLX5_CMD_STAT_NOT_READY:			return -EAGAIN;
 	case MLX5_CMD_STAT_LIM_ERR:			return -ENOMEM;
 	case MLX5_CMD_STAT_BAD_RES_STATE_ERR:		return -EINVAL;
 	case MLX5_CMD_STAT_IX_ERR:			return -EINVAL;
@@ -815,14 +818,16 @@ EXPORT_SYMBOL(mlx5_cmd_out_err);
 static void cmd_status_print(struct mlx5_core_dev *dev, void *in, void *out)
 {
 	u16 opcode, op_mod;
+	u8 status;
 	u16 uid;
 
 	opcode = in_to_opcode(in);
 	op_mod = MLX5_GET(mbox_in, in, op_mod);
 	uid    = MLX5_GET(mbox_in, in, uid);
+	status = MLX5_GET(mbox_out, out, status);
 
 	if (!uid && opcode != MLX5_CMD_OP_DESTROY_MKEY &&
-	    opcode != MLX5_CMD_OP_CREATE_UCTX)
+	    opcode != MLX5_CMD_OP_CREATE_UCTX && status != MLX5_CMD_STAT_NOT_READY)
 		mlx5_cmd_out_err(dev, opcode, op_mod, out);
 }
 

include/linux/mlx5/device.h

@@ -1449,6 +1449,7 @@ enum {
 	MLX5_CMD_STAT_BAD_SYS_STATE_ERR		= 0x4,
 	MLX5_CMD_STAT_BAD_RES_ERR		= 0x5,
 	MLX5_CMD_STAT_RES_BUSY			= 0x6,
+	MLX5_CMD_STAT_NOT_READY			= 0x7,
 	MLX5_CMD_STAT_LIM_ERR			= 0x8,
 	MLX5_CMD_STAT_BAD_RES_STATE_ERR		= 0x9,
 	MLX5_CMD_STAT_IX_ERR			= 0xa,