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authorEli Cohen <eli@dev.mellanox.co.il>2014-01-30 13:49:48 +0200
committerRoland Dreier <roland@purestorage.com>2014-02-06 23:00:48 -0800
commit78c0f98cc9dd46824fa66f35f14ea24ba733d145 (patch)
tree16954ba1b3c48438748dcb954c01695eb3902005 /include/linux/mlx5
parent9e65dc371b5c8d7476c81353137efc13cc1bdabd (diff)
downloadlinux-78c0f98cc9dd46824fa66f35f14ea24ba733d145.tar.gz
IB/mlx5: Fix binary compatibility with libmlx5
Commit c1be5232d21d ("Fix micro UAR allocator") broke binary compatibility between libmlx5 and mlx5_ib since it defines a different value to the number of micro UARs per page, leading to wrong calculation in libmlx5. This patch defines struct mlx5_ib_alloc_ucontext_req_v2 as an extension to struct mlx5_ib_alloc_ucontext_req. The extended size is determined in mlx5_ib_alloc_ucontext() and in case of old library we use uuarn 0 which works fine -- this is acheived due to create_user_qp() falling back from high to medium then to low class where low class will return 0. For new libraries we use the more sophisticated allocation algorithm. Signed-off-by: Eli Cohen <eli@mellanox.com> Reviewed-by: Yann Droneaud <ydroneaud@opteya.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'include/linux/mlx5')
-rw-r--r--include/linux/mlx5/driver.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 554548cd3dd4..32cb18c399c2 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -227,6 +227,7 @@ struct mlx5_uuar_info {
* protect uuar allocation data structs
*/
struct mutex lock;
+ u32 ver;
};
struct mlx5_bf {