From 313abe55a87bc10e55d00f337d609e17ad5f8c9a Mon Sep 17 00:00:00 2001 From: Jack Morgenstein Date: Mon, 28 Jan 2008 10:40:51 +0200 Subject: mlx4_core: For 64-bit systems, vmap() kernel queue buffers Since kernel virtual memory is not a problem on 64-bit systems, there is no reason to use our own 2-layer page mapping scheme for large kernel queue buffers on such systems. Instead, map the page list to a single virtually contiguous buffer with vmap(), so that can we access buffer memory via direct indexing. Signed-off-by: Michael S. Tsirkin Signed-off-by: Jack Morgenstein Signed-off-by: Roland Dreier --- include/linux/mlx4/device.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux/mlx4') diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h index a0afa7511a3..631607788f8 100644 --- a/include/linux/mlx4/device.h +++ b/include/linux/mlx4/device.h @@ -189,7 +189,7 @@ struct mlx4_buf_list { }; struct mlx4_buf { - union { + struct { struct mlx4_buf_list direct; struct mlx4_buf_list *page_list; } u; @@ -310,7 +310,7 @@ int mlx4_buf_alloc(struct mlx4_dev *dev, int size, int max_direct, 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 (buf->nbufs == 1) + if (BITS_PER_LONG == 64 || buf->nbufs == 1) return buf->u.direct.buf + offset; else return buf->u.page_list[offset >> PAGE_SHIFT].buf + -- cgit v1.2.3