IB/core: Re-enable create_flow/destroy_flow uverbs

This commit reverts commit 7afbddfae993 ("IB/core: Temporarily disable
create_flow/destroy_flow uverbs"). Since the uverbs extensions
functionality was experimental for v3.12, this patch re-enables the
support for them and flow-steering for v3.13.

Signed-off-by: Matan Barak <[e-mail]>
Signed-off-by: Roland Dreier <[e-mail]>

drivers/infiniband/Kconfig

···
 	  libibverbs, libibcm and a hardware driver library from
 	  <http://www.openfabrics.org/git/>.
 
-config INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING
-       bool "Experimental and unstable ABI for userspace access to flow steering verbs"
-       depends on INFINIBAND_USER_ACCESS
-       depends on STAGING
-	---help---
-	  The final ABI for userspace access to flow steering verbs
-	  has not been defined.  To use the current ABI, *WHICH WILL
-	  CHANGE IN THE FUTURE*, say Y here.
-
-	  If unsure, say N.
-
 config INFINIBAND_USER_MEM
 	bool
 	depends on INFINIBAND_USER_ACCESS != n

drivers/infiniband/core/uverbs.h

···
 IB_UVERBS_DECLARE_CMD(open_xrcd);
 IB_UVERBS_DECLARE_CMD(close_xrcd);
 
-#ifdef CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING
-
 #define IB_UVERBS_DECLARE_EX_CMD(name)				\
 	int ib_uverbs_ex_##name(struct ib_uverbs_file *file,	\
 				struct ib_udata *ucore,		\
···
 
 IB_UVERBS_DECLARE_EX_CMD(create_flow);
 IB_UVERBS_DECLARE_EX_CMD(destroy_flow);
-
-#endif /* CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING */
 
 #endif /* UVERBS_H */

drivers/infiniband/core/uverbs_cmd.c

···
 static struct uverbs_lock_class ah_lock_class	= { .name = "AH-uobj" };
 static struct uverbs_lock_class srq_lock_class	= { .name = "SRQ-uobj" };
 static struct uverbs_lock_class xrcd_lock_class = { .name = "XRCD-uobj" };
-#ifdef CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING
 static struct uverbs_lock_class rule_lock_class = { .name = "RULE-uobj" };
-#endif /* CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING */
 
 /*
  * The ib_uobject locking scheme is as follows:
···
 	return ret ? ret : in_len;
 }
 
-#ifdef CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING
 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
 				union ib_flow_spec *ib_spec)
 {
···
 
 	return ret;
 }
-#endif /* CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING */
 
 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
 				struct ib_uverbs_create_xsrq *cmd,

drivers/infiniband/core/uverbs_main.c

···
 	[IB_USER_VERBS_CMD_OPEN_QP]		= ib_uverbs_open_qp,
 };
 
-#ifdef CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING
 static int (*uverbs_ex_cmd_table[])(struct ib_uverbs_file *file,
 				    struct ib_udata *ucore,
 				    struct ib_udata *uhw) = {
 	[IB_USER_VERBS_EX_CMD_CREATE_FLOW]	= ib_uverbs_ex_create_flow,
 	[IB_USER_VERBS_EX_CMD_DESTROY_FLOW]	= ib_uverbs_ex_destroy_flow
 };
-#endif /* CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING */
 
 static void ib_uverbs_add_one(struct ib_device *device);
 static void ib_uverbs_remove_one(struct ib_device *device);
···
 						 hdr.in_words * 4,
 						 hdr.out_words * 4);
 
-#ifdef CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING
-
 	} else if (flags == IB_USER_VERBS_CMD_FLAG_EXTENDED) {
 		__u32 command;
 
···
 
 		return written_count;
 	}
-#endif /* CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING */
 
 	return -ENOSYS;
 }

drivers/infiniband/hw/mlx4/main.c

···
 		ibdev->ib_dev.create_flow	= mlx4_ib_create_flow;
 		ibdev->ib_dev.destroy_flow	= mlx4_ib_destroy_flow;
 
-#ifdef CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING
 		ibdev->ib_dev.uverbs_ex_cmd_mask	|=
 			(1ull << IB_USER_VERBS_EX_CMD_CREATE_FLOW) |
 			(1ull << IB_USER_VERBS_EX_CMD_DESTROY_FLOW);
-#endif /* CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING */
 	}
 
 	mlx4_ib_alloc_eqs(dev, ibdev);

include/uapi/rdma/ib_user_verbs.h

···
 	IB_USER_VERBS_CMD_OPEN_QP,
 };
 
-#ifdef CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING
 enum {
 	IB_USER_VERBS_EX_CMD_CREATE_FLOW = IB_USER_VERBS_CMD_THRESHOLD,
 	IB_USER_VERBS_EX_CMD_DESTROY_FLOW
 };
-#endif /* CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING */
 
 /*
  * Make sure that all structs defined in this file remain laid out so
···
 	__u16 out_words;
 };
 
-#ifdef CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING
 struct ib_uverbs_ex_cmd_hdr {
 	__u64 response;
 	__u16 provider_in_words;
 	__u16 provider_out_words;
 	__u32 cmd_hdr_reserved;
 };
-#endif /* CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING */
 
 struct ib_uverbs_get_context {
 	__u64 response;
···
 	__u64 driver_data[0];
 };
 
-#ifdef CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING
 struct ib_uverbs_flow_spec_hdr {
 	__u32 type;
 	__u16 size;
···
 	__u32 comp_mask;
 	__u32 flow_handle;
 };
-#endif /* CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING */
 
 struct ib_uverbs_create_srq {
 	__u64 response;