RDMA: Remove uverbs_ex_cmd_mask values that are linked to functions

Since a while now the uverbs layer checks if the driver implements a
function before allowing the ucmd to proceed. This largely obsoletes the
cmd_mask stuff, but there is some tricky bits in drivers preventing it
from being removed.

Remove the easy elements of uverbs_ex_cmd_mask by pre-setting them in the
core code. These are triggered soley based on the related ops function
pointer.

query_device_ex is not triggered based on an op, but all drivers already
implement something compatible with the extension, so enable it globally
too.

Link: https://lore.kernel.org/r/2-v1-caa70ba3d1ab+1436e-ucmd_mask_jgg@nvidia.comSigned-off-by: NJason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/core/device.c

@@ -600,6 +600,17 @@ struct ib_device *_ib_alloc_device(size_t size)
 	init_completion(&device->unreg_completion);
 	INIT_WORK(&device->unregistration_work, ib_unregister_work);
 
+	device->uverbs_ex_cmd_mask =
+		BIT_ULL(IB_USER_VERBS_EX_CMD_CREATE_FLOW) |
+		BIT_ULL(IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL) |
+		BIT_ULL(IB_USER_VERBS_EX_CMD_CREATE_WQ) |
+		BIT_ULL(IB_USER_VERBS_EX_CMD_DESTROY_FLOW) |
+		BIT_ULL(IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL) |
+		BIT_ULL(IB_USER_VERBS_EX_CMD_DESTROY_WQ) |
+		BIT_ULL(IB_USER_VERBS_EX_CMD_MODIFY_CQ) |
+		BIT_ULL(IB_USER_VERBS_EX_CMD_MODIFY_WQ) |
+		BIT_ULL(IB_USER_VERBS_EX_CMD_QUERY_DEVICE);
+
 	return device;
 }
 EXPORT_SYMBOL(_ib_alloc_device);

drivers/infiniband/core/uverbs_cmd.c

@@ -3753,7 +3753,7 @@ const struct uapi_definition uverbs_def_write_intf[] = {
 			IB_USER_VERBS_EX_CMD_MODIFY_CQ,
 			ib_uverbs_ex_modify_cq,
 			UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq),
-			UAPI_DEF_METHOD_NEEDS_FN(create_cq))),
+			UAPI_DEF_METHOD_NEEDS_FN(modify_cq))),
 
 	DECLARE_UVERBS_OBJECT(
 		UVERBS_OBJECT_DEVICE,

drivers/infiniband/hw/efa/efa_main.c

@@ -326,9 +326,6 @@ static int efa_ib_device_add(struct efa_dev *dev)
 		(1ull << IB_USER_VERBS_CMD_CREATE_AH) |
 		(1ull << IB_USER_VERBS_CMD_DESTROY_AH);
 
-	dev->ibdev.uverbs_ex_cmd_mask =
-		(1ull << IB_USER_VERBS_EX_CMD_QUERY_DEVICE);
-
 	ib_set_device_ops(&dev->ibdev, &efa_dev_ops);
 
 	err = ib_register_device(&dev->ibdev, "efa_%d", &pdev->dev);

drivers/infiniband/hw/hns/hns_roce_hw_v1.c

@@ -2062,11 +2062,6 @@ static void hns_roce_v1_write_cqc(struct hns_roce_dev *hr_dev,
 		       CQ_CONTEXT_CQC_BYTE_32_CQ_CONS_IDX_S, 0);
 }
 
-static int hns_roce_v1_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
-{
-	return -EOPNOTSUPP;
-}
-
 static int hns_roce_v1_req_notify_cq(struct ib_cq *ibcq,
 				     enum ib_cq_notify_flags flags)
 {
@@ -4347,7 +4342,6 @@ static void hns_roce_v1_cleanup_eq_table(struct hns_roce_dev *hr_dev)
 
 static const struct ib_device_ops hns_roce_v1_dev_ops = {
 	.destroy_qp = hns_roce_v1_destroy_qp,
-	.modify_cq = hns_roce_v1_modify_cq,
 	.poll_cq = hns_roce_v1_poll_cq,
 	.post_recv = hns_roce_v1_post_recv,
 	.post_send = hns_roce_v1_post_send,
@@ -4367,7 +4361,6 @@ static const struct hns_roce_hw hns_roce_hw_v1 = {
 	.set_mtu = hns_roce_v1_set_mtu,
 	.write_mtpt = hns_roce_v1_write_mtpt,
 	.write_cqc = hns_roce_v1_write_cqc,
-	.modify_cq = hns_roce_v1_modify_cq,
 	.clear_hem = hns_roce_v1_clear_hem,
 	.modify_qp = hns_roce_v1_modify_qp,
 	.query_qp = hns_roce_v1_query_qp,

drivers/infiniband/hw/hns/hns_roce_main.c

@@ -507,8 +507,6 @@ static int hns_roce_register_device(struct hns_roce_dev *hr_dev)
 		(1ULL << IB_USER_VERBS_CMD_QUERY_QP) |
 		(1ULL << IB_USER_VERBS_CMD_DESTROY_QP);
 
-	ib_dev->uverbs_ex_cmd_mask |= (1ULL << IB_USER_VERBS_EX_CMD_MODIFY_CQ);
-
 	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_REREG_MR) {
 		ib_dev->uverbs_cmd_mask |= (1ULL << IB_USER_VERBS_CMD_REREG_MR);
 		ib_set_device_ops(ib_dev, &hns_roce_dev_mr_ops);

drivers/infiniband/hw/mlx4/main.c

@@ -2685,8 +2685,6 @@ static void *mlx4_ib_add(struct mlx4_dev *dev)
 
 	ib_set_device_ops(&ibdev->ib_dev, &mlx4_ib_dev_ops);
 	ibdev->ib_dev.uverbs_ex_cmd_mask |=
-		(1ull << IB_USER_VERBS_EX_CMD_MODIFY_CQ) |
-		(1ull << IB_USER_VERBS_EX_CMD_QUERY_DEVICE) |
 		(1ull << IB_USER_VERBS_EX_CMD_CREATE_CQ) |
 		(1ull << IB_USER_VERBS_EX_CMD_CREATE_QP);
 
@@ -2694,15 +2692,8 @@ static void *mlx4_ib_add(struct mlx4_dev *dev)
 	    ((mlx4_ib_port_link_layer(&ibdev->ib_dev, 1) ==
 	    IB_LINK_LAYER_ETHERNET) ||
 	    (mlx4_ib_port_link_layer(&ibdev->ib_dev, 2) ==
-	    IB_LINK_LAYER_ETHERNET))) {
-		ibdev->ib_dev.uverbs_ex_cmd_mask |=
-			(1ull << IB_USER_VERBS_EX_CMD_CREATE_WQ)	  |
-			(1ull << IB_USER_VERBS_EX_CMD_MODIFY_WQ)	  |
-			(1ull << IB_USER_VERBS_EX_CMD_DESTROY_WQ)	  |
-			(1ull << IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL) |
-			(1ull << IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL);
+	    IB_LINK_LAYER_ETHERNET)))
 		ib_set_device_ops(&ibdev->ib_dev, &mlx4_ib_dev_wq_ops);
-	}
 
 	if (dev->caps.flags & MLX4_DEV_CAP_FLAG_MEM_WINDOW ||
 	    dev->caps.bmme_flags & MLX4_BMME_FLAG_TYPE_2_WIN) {
@@ -2721,9 +2712,6 @@ static void *mlx4_ib_add(struct mlx4_dev *dev)
 
 	if (check_flow_steering_support(dev)) {
 		ibdev->steering_support = MLX4_STEERING_MODE_DEVICE_MANAGED;
-		ibdev->ib_dev.uverbs_ex_cmd_mask	|=
-			(1ull << IB_USER_VERBS_EX_CMD_CREATE_FLOW) |
-			(1ull << IB_USER_VERBS_EX_CMD_DESTROY_FLOW);
 		ib_set_device_ops(&ibdev->ib_dev, &mlx4_ib_dev_fs_ops);
 	}
 

drivers/infiniband/hw/mlx5/main.c

@@ -4166,14 +4166,10 @@ static int mlx5_ib_stage_caps_init(struct mlx5_ib_dev *dev)
 		(1ull << IB_USER_VERBS_CMD_DESTROY_SRQ)		|
 		(1ull << IB_USER_VERBS_CMD_CREATE_XSRQ)		|
 		(1ull << IB_USER_VERBS_CMD_OPEN_QP);
-	dev->ib_dev.uverbs_ex_cmd_mask =
-		(1ull << IB_USER_VERBS_EX_CMD_QUERY_DEVICE)	|
+	dev->ib_dev.uverbs_ex_cmd_mask |=
 		(1ull << IB_USER_VERBS_EX_CMD_CREATE_CQ)	|
 		(1ull << IB_USER_VERBS_EX_CMD_CREATE_QP)	|
-		(1ull << IB_USER_VERBS_EX_CMD_MODIFY_QP)	|
-		(1ull << IB_USER_VERBS_EX_CMD_MODIFY_CQ)	|
-		(1ull << IB_USER_VERBS_EX_CMD_CREATE_FLOW)	|
-		(1ull << IB_USER_VERBS_EX_CMD_DESTROY_FLOW);
+		(1ull << IB_USER_VERBS_EX_CMD_MODIFY_QP);
 
 	if (MLX5_CAP_GEN(mdev, ipoib_enhanced_offloads) &&
 	    IS_ENABLED(CONFIG_MLX5_CORE_IPOIB))
@@ -4276,12 +4272,6 @@ static int mlx5_ib_roce_init(struct mlx5_ib_dev *dev)
 	ll = mlx5_port_type_cap_to_rdma_ll(port_type_cap);
 
 	if (ll == IB_LINK_LAYER_ETHERNET) {
-		dev->ib_dev.uverbs_ex_cmd_mask |=
-			(1ull << IB_USER_VERBS_EX_CMD_CREATE_WQ) |
-			(1ull << IB_USER_VERBS_EX_CMD_MODIFY_WQ) |
-			(1ull << IB_USER_VERBS_EX_CMD_DESTROY_WQ) |
-			(1ull << IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL) |
-			(1ull << IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL);
 		ib_set_device_ops(&dev->ib_dev, &mlx5_ib_dev_common_roce_ops);
 
 		port_num = mlx5_core_native_port_num(dev->mdev) - 1;