[PATCH v4 net-next 11/21] net/mlx5: Add 128B CQE for NVMEoTCP offload

Boris Pismenny
2021-02-11T21:12:47Z

From: Ben Ben-ishay <benishay@nvidia.com>

Add the NVMEoTCP offload definition and access functions for 128B CQEs.

Signed-off-by: Ben Ben-ishay <benishay@nvidia.com>
Signed-off-by: Boris Pismenny <borisp@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Yoray Zack <yorayz@mellanox.com>
---
include/linux/mlx5/device.h | 36 +++++++++++++++++++++++++++++++++++-
1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/include/linux/mlx5/device.h b/include/linux/mlx5/device.h
index ab04959188b9..f6548c255290 100644
--- a/include/linux/mlx5/device.h
+++ b/include/linux/mlx5/device.h
@@ -791,7 +791,7 @@ struct mlx5_err_cqe {

struct mlx5_cqe64 {
u8 tls_outer_l3_tunneled;
- u8 rsvd0;
+ u8 nvmetcp;
__be16 wqe_id;
u8 lro_tcppsh_abort_dupack;
u8 lro_min_ttl;
@@ -824,6 +824,19 @@ struct mlx5_cqe64 {
u8 op_own;
};

+struct mlx5e_cqe128 {
+ __be16 cclen;
+ __be16 hlen;
+ union {
+ __be32 resync_tcp_sn;
+ __be32 ccoff;
+ };
+ __be16 ccid;
+ __be16 rsvd8;
+ u8 rsvd12[52];
+ struct mlx5_cqe64 cqe64;
+};
+
struct mlx5_mini_cqe8 {
union {
__be32 rx_hash_result;
@@ -854,6 +867,27 @@ enum {

#define MLX5_MINI_CQE_ARRAY_SIZE 8

+static inline bool cqe_is_nvmeotcp_resync(struct mlx5_cqe64 *cqe)
+{
+ return ((cqe->nvmetcp >> 6) & 0x1);
+}
+
+static inline bool cqe_is_nvmeotcp_crcvalid(struct mlx5_cqe64 *cqe)
+{
+ return ((cqe->nvmetcp >> 5) & 0x1);
+}
+
+static inline bool cqe_is_nvmeotcp_zc(struct mlx5_cqe64 *cqe)
+{
+ return ((cqe->nvmetcp >> 4) & 0x1);
+}
+
+/* check if cqe is zc or crc or resync */
+static inline bool cqe_is_nvmeotcp(struct mlx5_cqe64 *cqe)
+{
+ return ((cqe->nvmetcp >> 4) & 0x7);
+}
+
static inline u8 mlx5_get_cqe_format(struct mlx5_cqe64 *cqe)
{
return (cqe->op_own >> 2) & 0x3;