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>

1 files changed, 45 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index dde8fe9af47e..d9fc822a1468 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/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: