IB/mlx4: Display misc device information under /sys/class/infiniband/

display the following device information under /sys/class/infiniband/mlx4_X:
board_id, fw_ver, hw_rev, hca_type.

This patch makes this information available to userspace utilities
such as ibstat and ibv_devinfo.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/mlx4/main.c

@@ -476,9 +476,48 @@ out:
 	return err;
 }
 
+static ssize_t show_hca(struct class_device *cdev, char *buf)
+{
+	struct mlx4_ib_dev *dev = container_of(cdev, struct mlx4_ib_dev, ib_dev.class_dev);
+	return sprintf(buf, "MT%d\n", dev->dev->pdev->device);
+}
+
+static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
+{
+	struct mlx4_ib_dev *dev = container_of(cdev, struct mlx4_ib_dev, ib_dev.class_dev);
+	return sprintf(buf, "%d.%d.%d\n", (int) (dev->dev->caps.fw_ver >> 32),
+		       (int) (dev->dev->caps.fw_ver >> 16) & 0xffff,
+		       (int) dev->dev->caps.fw_ver & 0xffff);
+}
+
+static ssize_t show_rev(struct class_device *cdev, char *buf)
+{
+	struct mlx4_ib_dev *dev = container_of(cdev, struct mlx4_ib_dev, ib_dev.class_dev);
+	return sprintf(buf, "%x\n", dev->dev->rev_id);
+}
+
+static ssize_t show_board(struct class_device *cdev, char *buf)
+{
+	struct mlx4_ib_dev *dev = container_of(cdev, struct mlx4_ib_dev, ib_dev.class_dev);
+	return sprintf(buf, "%.*s\n", MLX4_BOARD_ID_LEN, dev->dev->board_id);
+}
+
+static CLASS_DEVICE_ATTR(hw_rev,   S_IRUGO, show_rev,    NULL);
+static CLASS_DEVICE_ATTR(fw_ver,   S_IRUGO, show_fw_ver, NULL);
+static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca,    NULL);
+static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_board,  NULL);
+
+static struct class_device_attribute *mlx4_class_attributes[] = {
+	&class_device_attr_hw_rev,
+	&class_device_attr_fw_ver,
+	&class_device_attr_hca_type,
+	&class_device_attr_board_id
+};
+
 static void *mlx4_ib_add(struct mlx4_dev *dev)
 {
 	struct mlx4_ib_dev *ibdev;
+	int i;
 
 	ibdev = (struct mlx4_ib_dev *) ib_alloc_device(sizeof *ibdev);
 	if (!ibdev) {
@@ -580,6 +619,12 @@ static void *mlx4_ib_add(struct mlx4_dev *dev)
 	if (mlx4_ib_mad_init(ibdev))
 		goto err_reg;
 
+	for (i = 0; i < ARRAY_SIZE(mlx4_class_attributes); ++i) {
+		if (class_device_create_file(&ibdev->ib_dev.class_dev,
+					       mlx4_class_attributes[i]))
+			goto err_reg;
+	}
+
 	return ibdev;
 
 err_reg:

drivers/net/mlx4/main.c

@@ -524,8 +524,8 @@ static int __devinit mlx4_init_hca(struct mlx4_dev *dev)
 	}
 
 	priv->eq_table.inta_pin = adapter.inta_pin;
-	priv->rev_id		= adapter.revision_id;
-	memcpy(priv->board_id, adapter.board_id, sizeof priv->board_id);
+	dev->rev_id		= adapter.revision_id;
+	memcpy(dev->board_id, adapter.board_id, sizeof dev->board_id);
 
 	return 0;
 

drivers/net/mlx4/mlx4.h

@@ -55,10 +55,6 @@ enum {
 	MLX4_CLR_INT_SIZE	= 0x00008
 };
 
-enum {
-	MLX4_BOARD_ID_LEN	= 64
-};
-
 enum {
 	MLX4_MGM_ENTRY_SIZE	=  0x40,
 	MLX4_QP_PER_MGM		= 4 * (MLX4_MGM_ENTRY_SIZE / 16 - 2),
@@ -277,9 +273,6 @@ struct mlx4_priv {
 
 	struct mlx4_uar		driver_uar;
 	void __iomem	       *kar;
-
-	u32			rev_id;
-	char			board_id[MLX4_BOARD_ID_LEN];
 };
 
 static inline struct mlx4_priv *mlx4_priv(struct mlx4_dev *dev)

include/linux/mlx4/device.h

@@ -48,6 +48,10 @@ enum {
 	MLX4_MAX_PORTS		= 2
 };
 
+enum {
+	MLX4_BOARD_ID_LEN = 64
+};
+
 enum {
 	MLX4_DEV_CAP_FLAG_RC		= 1 <<  0,
 	MLX4_DEV_CAP_FLAG_UC		= 1 <<  1,
@@ -272,6 +276,8 @@ struct mlx4_dev {
 	unsigned long		flags;
 	struct mlx4_caps	caps;
 	struct radix_tree_root	qp_table_tree;
+	u32			rev_id;
+	char			board_id[MLX4_BOARD_ID_LEN];
 };
 
 struct mlx4_init_port_param {