Commit 81164699 authored by Michael Guralnik's avatar Michael Guralnik Committed by Jason Gunthorpe
Browse files

RDMA/core: Add the core support field to METHOD_GET_CONTEXT 

Add the core support field to METHOD_GET_CONTEXT, this field should
represent capabilities that are not device-specific.

Return support for optional access flags for memory regions. User-space
will use this capability to mask the optional access flags for
unsupporting kernels.

Link: https://lore.kernel.org/r/1578506740-22188-10-git-send-email-yishaih@mellanox.com


Signed-off-by: default avatarMichael Guralnik <michaelgur@mellanox.com>
Signed-off-by: default avatarYishai Hadas <yishaih@mellanox.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent 2233c660

drivers/infiniband/core/uverbs_std_types_device.c

+8 −0
Original line number Diff line number Diff line
@@ -204,6 +204,7 @@ static int UVERBS_HANDLER(UVERBS_METHOD_GET_CONTEXT)( 
	struct uverbs_attr_bundle *attrs)

{

	u32 num_comp = attrs->ufile->device->num_comp_vectors;

	u64 core_support = IB_UVERBS_CORE_SUPPORT_OPTIONAL_MR_ACCESS;

	int ret;



	ret = uverbs_copy_to(attrs, UVERBS_ATTR_GET_CONTEXT_NUM_COMP_VECTORS,
@@ -211,6 +212,11 @@ static int UVERBS_HANDLER(UVERBS_METHOD_GET_CONTEXT)( 
	if (IS_UVERBS_COPY_ERR(ret))

		return ret;



	ret = uverbs_copy_to(attrs, UVERBS_ATTR_GET_CONTEXT_CORE_SUPPORT,

			     &core_support, sizeof(core_support));

	if (IS_UVERBS_COPY_ERR(ret))

		return ret;



	ret = ib_alloc_ucontext(attrs);

	if (ret)

		return ret;
@@ -227,6 +233,8 @@ DECLARE_UVERBS_NAMED_METHOD( 
	UVERBS_METHOD_GET_CONTEXT,

	UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_GET_CONTEXT_NUM_COMP_VECTORS,

			    UVERBS_ATTR_TYPE(u32), UA_OPTIONAL),

	UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_GET_CONTEXT_CORE_SUPPORT,

			    UVERBS_ATTR_TYPE(u64), UA_OPTIONAL),

	UVERBS_ATTR_UHW());



DECLARE_UVERBS_NAMED_METHOD(

include/uapi/rdma/ib_user_ioctl_cmds.h

+1 −0
Original line number Diff line number Diff line
@@ -84,6 +84,7 @@ enum uverbs_attrs_query_port_cmd_attr_ids { 


enum uverbs_attrs_get_context_attr_ids {

	UVERBS_ATTR_GET_CONTEXT_NUM_COMP_VECTORS,

	UVERBS_ATTR_GET_CONTEXT_CORE_SUPPORT,

};



enum uverbs_attrs_create_cq_cmd_attr_ids {

include/uapi/rdma/ib_user_ioctl_verbs.h

+4 −0
Original line number Diff line number Diff line
@@ -44,6 +44,10 @@ 
#define IB_UVERBS_ACCESS_OPTIONAL_FIRST (1 << 20)

#define IB_UVERBS_ACCESS_OPTIONAL_LAST (1 << 29)



enum ib_uverbs_core_support {

	IB_UVERBS_CORE_SUPPORT_OPTIONAL_MR_ACCESS = 1 << 0,

};



enum ib_uverbs_access_flags {

	IB_UVERBS_ACCESS_LOCAL_WRITE = 1 << 0,

	IB_UVERBS_ACCESS_REMOTE_WRITE = 1 << 1,

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