Subject: [PATCH v5 net-next 10/36] net/mlx5: Add 128B CQE for NVMEoTCP offload

From: Boris Pismenny <[email-masked]>
Date: Thu, 22 Jul 2021 14:02:59 +0300

From: Ben Ben-ishay <[email-masked]>

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

Signed-off-by: Ben Ben-ishay <[email-masked]>
Signed-off-by: Boris Pismenny <[email-masked]>
Signed-off-by: Or Gerlitz <[email-masked]>
Signed-off-by: Yoray Zack <[email-masked]>
---
 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 a42e47f91327..412d0982ee46 100644
--- a/include/linux/mlx5/device.h
+++ b/include/linux/mlx5/device.h
@@ -794,7 +794,7 @@ 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;
@@ -827,6 +827,19 @@ 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;
@@ -857,6 +870,27 @@ 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;
-- 
2.24.1