net/mlx5: Display the command index in command mailbox dump

Multiple commands can be printed at the same time which can
lead to wrong order of their lines in dmesg output.
As a result, it's hard to match data dumps to the correct command
or which command was fully dumped at some point.

Fix this by displaying the corresponding command index, and also
indicate when a command was fully dumped.
Signed-off-by: Alaa Hleihel <alaa@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

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

@@ -263,15 +263,15 @@ static int verify_signature(struct mlx5_cmd_work_ent *ent)
 	return 0;
 }
 
-static void dump_buf(void *buf, int size, int data_only, int offset)
+static void dump_buf(void *buf, int size, int data_only, int offset, int idx)
 {
 	__be32 *p = buf;
 	int i;
 
 	for (i = 0; i < size; i += 16) {
-		pr_debug("%03x: %08x %08x %08x %08x\n", offset, be32_to_cpu(p[0]),
-			 be32_to_cpu(p[1]), be32_to_cpu(p[2]),
-			 be32_to_cpu(p[3]));
+		pr_debug("cmd[%d]: %03x: %08x %08x %08x %08x\n", idx, offset,
+			 be32_to_cpu(p[0]), be32_to_cpu(p[1]),
+			 be32_to_cpu(p[2]), be32_to_cpu(p[3]));
 		p += 4;
 		offset += 16;
 	}
@@ -802,39 +802,41 @@ static void dump_command(struct mlx5_core_dev *dev,
 	int dump_len;
 	int i;
 
+	mlx5_core_dbg(dev, "cmd[%d]: start dump\n", ent->idx);
 	data_only = !!(mlx5_core_debug_mask & (1 << MLX5_CMD_DATA));
 
 	if (data_only)
 		mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_DATA,
-				   "dump command data %s(0x%x) %s\n",
-				   mlx5_command_str(op), op,
+				   "cmd[%d]: dump command data %s(0x%x) %s\n",
+				   ent->idx, mlx5_command_str(op), op,
 				   input ? "INPUT" : "OUTPUT");
 	else
-		mlx5_core_dbg(dev, "dump command %s(0x%x) %s\n",
-			      mlx5_command_str(op), op,
+		mlx5_core_dbg(dev, "cmd[%d]: dump command %s(0x%x) %s\n",
+			      ent->idx, mlx5_command_str(op), op,
 			      input ? "INPUT" : "OUTPUT");
 
 	if (data_only) {
 		if (input) {
-			dump_buf(ent->lay->in, sizeof(ent->lay->in), 1, offset);
+			dump_buf(ent->lay->in, sizeof(ent->lay->in), 1, offset, ent->idx);
 			offset += sizeof(ent->lay->in);
 		} else {
-			dump_buf(ent->lay->out, sizeof(ent->lay->out), 1, offset);
+			dump_buf(ent->lay->out, sizeof(ent->lay->out), 1, offset, ent->idx);
 			offset += sizeof(ent->lay->out);
 		}
 	} else {
-		dump_buf(ent->lay, sizeof(*ent->lay), 0, offset);
+		dump_buf(ent->lay, sizeof(*ent->lay), 0, offset, ent->idx);
 		offset += sizeof(*ent->lay);
 	}
 
 	for (i = 0; i < n && next; i++)  {
 		if (data_only) {
 			dump_len = min_t(int, MLX5_CMD_DATA_BLOCK_SIZE, msg->len - offset);
-			dump_buf(next->buf, dump_len, 1, offset);
+			dump_buf(next->buf, dump_len, 1, offset, ent->idx);
 			offset += MLX5_CMD_DATA_BLOCK_SIZE;
 		} else {
-			mlx5_core_dbg(dev, "command block:\n");
-			dump_buf(next->buf, sizeof(struct mlx5_cmd_prot_block), 0, offset);
+			mlx5_core_dbg(dev, "cmd[%d]: command block:\n", ent->idx);
+			dump_buf(next->buf, sizeof(struct mlx5_cmd_prot_block), 0, offset,
+				 ent->idx);
 			offset += sizeof(struct mlx5_cmd_prot_block);
 		}
 		next = next->next;
@@ -842,6 +844,8 @@ static void dump_command(struct mlx5_core_dev *dev,
 
 	if (data_only)
 		pr_debug("\n");
+
+	mlx5_core_dbg(dev, "cmd[%d]: end dump\n", ent->idx);
 }
 
 static u16 msg_to_opcode(struct mlx5_cmd_msg *in)