IB/mlx4: Add support for XRC domains

Support creating and destroying XRC domains.  Any sharing of the XRCD
is managed above the low-level driver.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 53ef894bfa05..6a3478d0b330 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -61,6 +61,7 @@ enum {
         MLX4_DEV_CAP_FLAG_RC            = 1LL <<  0,
         MLX4_DEV_CAP_FLAG_UC            = 1LL <<  1,
         MLX4_DEV_CAP_FLAG_UD            = 1LL <<  2,
+        MLX4_DEV_CAP_FLAG_XRC           = 1LL <<  3,
         MLX4_DEV_CAP_FLAG_SRQ           = 1LL <<  6,
         MLX4_DEV_CAP_FLAG_IPOIB_CSUM    = 1LL <<  7,
         MLX4_DEV_CAP_FLAG_BAD_PKEY_CNTR = 1LL <<  8,
@@ -256,6 +257,8 @@ struct mlx4_caps {
         int                     num_qp_per_mgm;
         int                     num_pds;
         int                     reserved_pds;
+        int                     max_xrcds;
+        int                     reserved_xrcds;
         int                     mtt_entry_sz;
         u32                     max_msg_sz;
         u32                     page_size_cap;
@@ -499,6 +502,8 @@ static inline void *mlx4_buf_offset(struct mlx4_buf *buf, int offset)
 
 int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn);
 void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn);
+int mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn);
+void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn);
 
 int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar);
 void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar);