IB/mlx5: Enhance UMR support to allow partial page table update

The current UMR interface doesn't allow partial updates to a memory
region's page tables. This patch changes the interface to allow that.

It also changes the way the UMR operation validates the memory
region's state.  When set, IB_SEND_UMR_FAIL_IF_FREE will cause the UMR
operation to fail if the MKEY is in the free state. When it is
unchecked the operation will check that it isn't in the free state.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/linux/mlx5/device.h b/include/linux/mlx5/device.h
index ea4f1c46f761..fa07bfda0e15 100644
--- a/include/linux/mlx5/device.h
+++ b/include/linux/mlx5/device.h
@@ -180,6 +180,15 @@ enum {
         MLX5_MKEY_MASK_FREE             = 1ull << 29,
 };
 
+enum {
+        MLX5_UMR_TRANSLATION_OFFSET_EN  = (1 << 4),
+
+        MLX5_UMR_CHECK_NOT_FREE         = (1 << 5),
+        MLX5_UMR_CHECK_FREE             = (2 << 5),
+
+        MLX5_UMR_INLINE                 = (1 << 7),
+};
+
 enum mlx5_event {
         MLX5_EVENT_TYPE_COMP               = 0x0,
 
@@ -776,6 +785,10 @@ struct mlx5_query_eq_mbox_out {
         struct mlx5_eq_context  ctx;
 };
 
+enum {
+        MLX5_MKEY_STATUS_FREE = 1 << 6,
+};
+
 struct mlx5_mkey_seg {
         /* This is a two bit field occupying bits 31-30.
          * bit 31 is always 0,