IB/mlx5: Add driver cross-channel support
Add support of cross-channel functionality to mlx5
driver. This includes ability to ignore overrun for CQ
which intended for cross-channel, export device capability and
configure the QP to be sync master/slave queues.
The cross-channel enabled QP supports combination of
three possible properties:
* WQE processing on the receive queue of this QP
* WQE processing on the send queue of this QP
* WQE are supported on the send queue
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index 1303487..d4b2271 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -90,6 +90,10 @@
MLX5_MAD_IFC_NET_VIEW = 4,
};
+enum {
+ MLX5_CROSS_CHANNEL_UUAR = 0,
+};
+
struct mlx5_ib_ucontext {
struct ib_ucontext ibucontext;
struct list_head db_page_list;
@@ -247,6 +251,9 @@
enum mlx5_ib_qp_flags {
MLX5_IB_QP_BLOCK_MULTICAST_LOOPBACK = 1 << 0,
MLX5_IB_QP_SIGNATURE_HANDLING = 1 << 1,
+ MLX5_IB_QP_CROSS_CHANNEL = 1 << 2,
+ MLX5_IB_QP_MANAGED_SEND = 1 << 3,
+ MLX5_IB_QP_MANAGED_RECV = 1 << 4,
};
struct mlx5_umr_wr {
@@ -289,6 +296,7 @@
struct mlx5_ib_cq_buf *resize_buf;
struct ib_umem *resize_umem;
int cqe_size;
+ u32 create_flags;
};
struct mlx5_ib_srq {
@@ -678,4 +686,12 @@
#define MLX5_MAX_UMR_SHIFT 16
#define MLX5_MAX_UMR_PAGES (1 << MLX5_MAX_UMR_SHIFT)
+static inline u32 check_cq_create_flags(u32 flags)
+{
+ /*
+ * It returns non-zero value for unsupported CQ
+ * create flags, otherwise it returns zero.
+ */
+ return (flags & ~IB_CQ_FLAGS_IGNORE_OVERRUN);
+}
#endif /* MLX5_IB_H */