1 files changed, 15 insertions, 4 deletions

diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 222815d91c40..6cdf813cd478 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -133,6 +133,11 @@ enum {
         MLX4_STAT_RATE_OFFSET   = 5
 };
 
+static inline u64 mlx4_fw_ver(u64 major, u64 minor, u64 subminor)
+{
+        return (major << 32) | (minor << 16) | subminor;
+}
+
 struct mlx4_caps {
         u64                     fw_ver;
         int                     num_ports;
@@ -189,10 +194,8 @@ struct mlx4_buf_list {
 };
 
 struct mlx4_buf {
-        union {
-                struct mlx4_buf_list    direct;
-                struct mlx4_buf_list   *page_list;
-        } u;
+        struct mlx4_buf_list    direct;
+        struct mlx4_buf_list   *page_list;
         int                     nbufs;
         int                     npages;
         int                     page_shift;
@@ -308,6 +311,14 @@ struct mlx4_init_port_param {
 int mlx4_buf_alloc(struct mlx4_dev *dev, int size, int max_direct,
                    struct mlx4_buf *buf);
 void mlx4_buf_free(struct mlx4_dev *dev, int size, struct mlx4_buf *buf);
+static inline void *mlx4_buf_offset(struct mlx4_buf *buf, int offset)
+{
+        if (BITS_PER_LONG == 64 || buf->nbufs == 1)
+                return buf->direct.buf + offset;
+        else
+                return buf->page_list[offset >> PAGE_SHIFT].buf +
+                        (offset & (PAGE_SIZE - 1));
+}
 
 int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn);
 void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn);