[PATCH v5 01/10] net/mlx5: Add IFC structures for CQE and WQE

[Jason Gunthorpe <jgg@nvidia.com>]

Building the WQE and CQE using the IFC system is easier than with a
C layout struct. Add definitions for their layout. Structs for:

  - wqe_ctrl_seg_bits (16B): WQE control segment
  - wqe_raddr_seg_bits (16B): RDMA remote address segment
  - wqe_data_seg_bits (16B): data segment
  - cqe64_bits (64B): 64-byte CQE with error syndrome union

The VFIO mlx5 selftest will use these.

Assisted-by: Claude:claude-opus-4.6
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 include/linux/mlx5/mlx5_ifc.h | 55 +++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index 12b9a81e562146..a3edc5ba1cd4f1 100644
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -5979,6 +5979,61 @@ struct mlx5_ifc_cqe_error_syndrome_bits {
 	u8         syndrome[0x8];
 };
 
+struct mlx5_ifc_wqe_ctrl_seg_bits {
+	u8         opmod[0x8];
+	u8         wqe_index[0x10];
+	u8         opcode[0x8];
+
+	u8         qp_or_sq[0x18];
+	u8         reserved_at_38[0x2];
+	u8         ds[0x6];
+
+	u8         signature[0x8];
+	u8         reserved_at_48[0x10];
+	u8         fm[0x3];
+	u8         reserved_at_5b[0x1];
+	u8         ce[0x2];
+	u8         se[0x1];
+	u8         reserved_at_5f[0x1];
+
+	u8         imm[0x20];
+};
+
+struct mlx5_ifc_wqe_raddr_seg_bits {
+	u8         raddr[0x40];
+
+	u8         rkey[0x20];
+	u8         reserved_at_60[0x20];
+};
+
+struct mlx5_ifc_wqe_data_seg_bits {
+	u8         reserved_at_0[0x1];
+	u8         byte_count[0x1f];
+
+	u8         lkey[0x20];
+
+	u8         addr[0x40];
+};
+
+struct mlx5_ifc_cqe64_bits {
+	u8         reserved_at_0[0x1a0];
+
+	union {
+		u8         reserved_at_1a0[0x20];
+		struct mlx5_ifc_cqe_error_syndrome_bits error_syndrome;
+	};
+
+	u8         send_wqe_opcode[0x8];
+	u8         qpn_or_dctn_or_flow_tag[0x18];
+
+	u8         wqe_counter[0x10];
+	u8         signature[0x8];
+	u8         opcode[0x4];
+	u8         cqe_format[0x2];
+	u8         se[0x1];
+	u8         owner[0x1];
+};
+
 struct mlx5_ifc_qp_context_extension_bits {
 	u8         reserved_at_0[0x60];
 
-- 
2.43.0