RDMA/mlx5: Support handling of modify-header pattern ICM area

Add support for allocate/deallocate and registering MR of the new type
of ICM area. Support exists only for devices that support sw_owner_v2.
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/infiniband/hw/mlx5/dm.c

@@ -336,9 +336,15 @@ static struct ib_dm *handle_alloc_dm_memic(struct ib_ucontext *ctx,
 
 static enum mlx5_sw_icm_type get_icm_type(int uapi_type)
 {
-	return uapi_type == MLX5_IB_UAPI_DM_TYPE_STEERING_SW_ICM ?
-		       MLX5_SW_ICM_TYPE_STEERING :
-		       MLX5_SW_ICM_TYPE_HEADER_MODIFY;
+	switch (uapi_type) {
+	case MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_SW_ICM:
+		return MLX5_SW_ICM_TYPE_HEADER_MODIFY;
+	case MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_PATTERN_SW_ICM:
+		return MLX5_SW_ICM_TYPE_HEADER_MODIFY_PATTERN;
+	case MLX5_IB_UAPI_DM_TYPE_STEERING_SW_ICM:
+	default:
+		return MLX5_SW_ICM_TYPE_STEERING;
+	}
 }
 
 static struct ib_dm *handle_alloc_dm_sw_icm(struct ib_ucontext *ctx,
@@ -347,11 +353,32 @@ static struct ib_dm *handle_alloc_dm_sw_icm(struct ib_ucontext *ctx,
 					    int type)
 {
 	struct mlx5_core_dev *dev = to_mdev(ctx->device)->mdev;
-	enum mlx5_sw_icm_type icm_type = get_icm_type(type);
+	enum mlx5_sw_icm_type icm_type;
 	struct mlx5_ib_dm_icm *dm;
 	u64 act_size;
 	int err;
 
+	if (!capable(CAP_SYS_RAWIO) || !capable(CAP_NET_RAW))
+		return ERR_PTR(-EPERM);
+
+	switch (type) {
+	case MLX5_IB_UAPI_DM_TYPE_STEERING_SW_ICM:
+	case MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_SW_ICM:
+		if (!(MLX5_CAP_FLOWTABLE_NIC_RX(dev, sw_owner) ||
+		      MLX5_CAP_FLOWTABLE_NIC_TX(dev, sw_owner) ||
+		      MLX5_CAP_FLOWTABLE_NIC_RX(dev, sw_owner_v2) ||
+		      MLX5_CAP_FLOWTABLE_NIC_TX(dev, sw_owner_v2)))
+			return ERR_PTR(-EOPNOTSUPP);
+		break;
+	case MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_PATTERN_SW_ICM:
+		if (!MLX5_CAP_FLOWTABLE_NIC_RX(dev, sw_owner_v2) ||
+		    !MLX5_CAP_FLOWTABLE_NIC_TX(dev, sw_owner_v2))
+			return ERR_PTR(-EOPNOTSUPP);
+		break;
+	default:
+		return ERR_PTR(-EOPNOTSUPP);
+	}
+
 	dm = kzalloc(sizeof(*dm), GFP_KERNEL);
 	if (!dm)
 		return ERR_PTR(-ENOMEM);
@@ -359,19 +386,6 @@ static struct ib_dm *handle_alloc_dm_sw_icm(struct ib_ucontext *ctx,
 	dm->base.type = type;
 	dm->base.ibdm.device = ctx->device;
 
-	if (!capable(CAP_SYS_RAWIO) || !capable(CAP_NET_RAW)) {
-		err = -EPERM;
-		goto free;
-	}
-
-	if (!(MLX5_CAP_FLOWTABLE_NIC_RX(dev, sw_owner) ||
-	      MLX5_CAP_FLOWTABLE_NIC_TX(dev, sw_owner) ||
-	      MLX5_CAP_FLOWTABLE_NIC_RX(dev, sw_owner_v2) ||
-	      MLX5_CAP_FLOWTABLE_NIC_TX(dev, sw_owner_v2))) {
-		err = -EOPNOTSUPP;
-		goto free;
-	}
-
 	/* Allocation size must a multiple of the basic block size
 	 * and a power of 2.
 	 */
@@ -379,6 +393,8 @@ static struct ib_dm *handle_alloc_dm_sw_icm(struct ib_ucontext *ctx,
 	act_size = roundup_pow_of_two(act_size);
 
 	dm->base.size = act_size;
+	icm_type = get_icm_type(type);
+
 	err = mlx5_dm_sw_icm_alloc(dev, icm_type, act_size, attr->alignment,
 				   to_mucontext(ctx)->devx_uid,
 				   &dm->base.dev_addr, &dm->obj_id);
@@ -420,8 +436,8 @@ struct ib_dm *mlx5_ib_alloc_dm(struct ib_device *ibdev,
 	case MLX5_IB_UAPI_DM_TYPE_MEMIC:
 		return handle_alloc_dm_memic(context, attr, attrs);
 	case MLX5_IB_UAPI_DM_TYPE_STEERING_SW_ICM:
-		return handle_alloc_dm_sw_icm(context, attr, attrs, type);
 	case MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_SW_ICM:
+	case MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_PATTERN_SW_ICM:
 		return handle_alloc_dm_sw_icm(context, attr, attrs, type);
 	default:
 		return ERR_PTR(-EOPNOTSUPP);
@@ -474,6 +490,7 @@ static int mlx5_ib_dealloc_dm(struct ib_dm *ibdm,
 		return 0;
 	case MLX5_IB_UAPI_DM_TYPE_STEERING_SW_ICM:
 	case MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_SW_ICM:
+	case MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_PATTERN_SW_ICM:
 		return mlx5_dm_icm_dealloc(ctx, to_icm(ibdm));
 	default:
 		return -EOPNOTSUPP;

drivers/infiniband/hw/mlx5/mr.c

@@ -1083,6 +1083,7 @@ struct ib_mr *mlx5_ib_reg_dm_mr(struct ib_pd *pd, struct ib_dm *dm,
 		break;
 	case MLX5_IB_UAPI_DM_TYPE_STEERING_SW_ICM:
 	case MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_SW_ICM:
+	case MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_PATTERN_SW_ICM:
 		if (attr->access_flags & ~MLX5_IB_DM_SW_ICM_ALLOWED_ACCESS)
 			return ERR_PTR(-EINVAL);
 

include/uapi/rdma/mlx5_user_ioctl_verbs.h

@@ -63,6 +63,7 @@ enum mlx5_ib_uapi_dm_type {
 	MLX5_IB_UAPI_DM_TYPE_MEMIC,
 	MLX5_IB_UAPI_DM_TYPE_STEERING_SW_ICM,
 	MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_SW_ICM,
+	MLX5_IB_UAPI_DM_TYPE_HEADER_MODIFY_PATTERN_SW_ICM,
 };
 
 enum mlx5_ib_uapi_devx_create_event_channel_flags {