diff options
| author |   Yishai Hadas <yishaih@mellanox.com> | 2020-06-30 12:39:12 +0300 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@nvidia.com> | 2020-07-06 19:50:33 -0300 |
| commit | 1c8fb1ea5a1dbd2159e78fa580aaffb001794cfa (patch) | |
| tree | 2a4741948790bd47d7f46dec18e78a74651eedd3 /drivers/infiniband/core/uverbs_std_types_device.c | |
| parent | IB/uverbs: Set IOVA on IB MR in uverbs layer (diff) | |
| download | linux-dev-1c8fb1ea5a1dbd2159e78fa580aaffb001794cfa.tar.xz linux-dev-1c8fb1ea5a1dbd2159e78fa580aaffb001794cfa.zip | |
IB/uverbs: Expose UAPI to query ucontext
Expose UAPI to query ucontext, this will let user space application that
didn't allocate the ucontext but has access to by owning the matching
command FD to retrieve the ucontext information.
Link: https://lore.kernel.org/r/20200630093916.332097-4-leon@kernel.org
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/core/uverbs_std_types_device.c')
| -rw-r--r-- | drivers/infiniband/core/uverbs_std_types_device.c | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/drivers/infiniband/core/uverbs_std_types_device.c b/drivers/infiniband/core/uverbs_std_types_device.c index ae4a59d6f9b1..8e58605a17be 100644 --- a/drivers/infiniband/core/uverbs_std_types_device.c +++ b/drivers/infiniband/core/uverbs_std_types_device.c @@ -229,6 +229,37 @@ static int UVERBS_HANDLER(UVERBS_METHOD_GET_CONTEXT)( return 0; } +static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_CONTEXT)( + struct uverbs_attr_bundle *attrs) +{ + u64 core_support = IB_UVERBS_CORE_SUPPORT_OPTIONAL_MR_ACCESS; + struct ib_ucontext *ucontext; + struct ib_device *ib_dev; + u32 num_comp; + int ret; + + ucontext = ib_uverbs_get_ucontext(attrs); + if (IS_ERR(ucontext)) + return PTR_ERR(ucontext); + ib_dev = ucontext->device; + + if (!ib_dev->ops.query_ucontext) + return -EOPNOTSUPP; + + num_comp = attrs->ufile->device->num_comp_vectors; + ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_CONTEXT_NUM_COMP_VECTORS, + &num_comp, sizeof(num_comp)); + if (IS_UVERBS_COPY_ERR(ret)) + return ret; + + ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_CONTEXT_CORE_SUPPORT, + &core_support, sizeof(core_support)); + if (IS_UVERBS_COPY_ERR(ret)) + return ret; + + return ucontext->device->ops.query_ucontext(ucontext, attrs); +} + DECLARE_UVERBS_NAMED_METHOD( UVERBS_METHOD_GET_CONTEXT, UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_GET_CONTEXT_NUM_COMP_VECTORS, @@ -238,6 +269,13 @@ DECLARE_UVERBS_NAMED_METHOD( UVERBS_ATTR_UHW()); DECLARE_UVERBS_NAMED_METHOD( + UVERBS_METHOD_QUERY_CONTEXT, + UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_CONTEXT_NUM_COMP_VECTORS, + UVERBS_ATTR_TYPE(u32), UA_OPTIONAL), + UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_CONTEXT_CORE_SUPPORT, + UVERBS_ATTR_TYPE(u64), UA_OPTIONAL)); + +DECLARE_UVERBS_NAMED_METHOD( UVERBS_METHOD_INFO_HANDLES, /* Also includes any device specific object ids */ UVERBS_ATTR_CONST_IN(UVERBS_ATTR_INFO_OBJECT_ID, @@ -260,7 +298,8 @@ DECLARE_UVERBS_GLOBAL_METHODS(UVERBS_OBJECT_DEVICE, &UVERBS_METHOD(UVERBS_METHOD_GET_CONTEXT), &UVERBS_METHOD(UVERBS_METHOD_INVOKE_WRITE), &UVERBS_METHOD(UVERBS_METHOD_INFO_HANDLES), - &UVERBS_METHOD(UVERBS_METHOD_QUERY_PORT)); + &UVERBS_METHOD(UVERBS_METHOD_QUERY_PORT), + &UVERBS_METHOD(UVERBS_METHOD_QUERY_CONTEXT)); const struct uapi_definition uverbs_def_obj_device[] = { UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_DEVICE), |