diff options
| author | Jason Gunthorpe <jgg@mellanox.com> | 2020-01-08 20:05:32 +0200 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2020-01-16 15:55:45 -0400 |
| commit | d680e88e2013186e696665cbf2056fb32b781e41 (patch) | |
| tree | 128c1594619cc03189a6a67ca881afb5fa530aad /drivers/infiniband/core | |
| parent | f862308579752c75f491d6d84948d1befc29514d (diff) | |
RDMA/core: Add UVERBS_METHOD_ASYNC_EVENT_ALLOC
Allow the async FD to be allocated separately from the context.
This is necessary to introduce the ioctl to create a context, as an ioctl
should only ever create a single uobject at a time.
If multiple async FDs are created then the first one is used to deliver
affiliated events from any ib_uevent_object, with all subsequent ones will
receive only unaffiliated events.
Link: https://lore.kernel.org/r/1578506740-22188-3-git-send-email-yishaih@mellanox.com
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/core')
| -rw-r--r-- | drivers/infiniband/core/uverbs_main.c | 4 | ||||
| -rw-r--r-- | drivers/infiniband/core/uverbs_std_types_async_fd.c | 23 |
2 files changed, 25 insertions, 2 deletions
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c index 1f279b0a8e49..fb9e75257607 100644 --- a/drivers/infiniband/core/uverbs_main.c +++ b/drivers/infiniband/core/uverbs_main.c @@ -475,7 +475,9 @@ void ib_uverbs_init_async_event_file( ib_uverbs_init_event_queue(&async_file->ev_queue); - if (!WARN_ON(uverbs_file->async_file)) { + /* The first async_event_file becomes the default one for the file. */ + lockdep_assert_held(&uverbs_file->ucontext_lock); + if (!uverbs_file->async_file) { /* Pairs with the put in ib_uverbs_release_file */ uverbs_uobject_get(&async_file->uobj); smp_store_release(&uverbs_file->async_file, async_file); diff --git a/drivers/infiniband/core/uverbs_std_types_async_fd.c b/drivers/infiniband/core/uverbs_std_types_async_fd.c index 31ff96898b06..484dba136950 100644 --- a/drivers/infiniband/core/uverbs_std_types_async_fd.c +++ b/drivers/infiniband/core/uverbs_std_types_async_fd.c @@ -8,6 +8,19 @@ #include "rdma_core.h" #include "uverbs.h" +static int UVERBS_HANDLER(UVERBS_METHOD_ASYNC_EVENT_ALLOC)( + struct uverbs_attr_bundle *attrs) +{ + struct ib_uobject *uobj = + uverbs_attr_get_uobject(attrs, UVERBS_METHOD_ASYNC_EVENT_ALLOC); + + mutex_lock(&attrs->ufile->ucontext_lock); + ib_uverbs_init_async_event_file( + container_of(uobj, struct ib_uverbs_async_event_file, uobj)); + mutex_unlock(&attrs->ufile->ucontext_lock); + return 0; +} + static int uverbs_async_event_destroy_uobj(struct ib_uobject *uobj, enum rdma_remove_reason why) { @@ -19,13 +32,21 @@ static int uverbs_async_event_destroy_uobj(struct ib_uobject *uobj, return 0; } +DECLARE_UVERBS_NAMED_METHOD( + UVERBS_METHOD_ASYNC_EVENT_ALLOC, + UVERBS_ATTR_FD(UVERBS_ATTR_ASYNC_EVENT_ALLOC_FD_HANDLE, + UVERBS_OBJECT_ASYNC_EVENT, + UVERBS_ACCESS_NEW, + UA_MANDATORY)); + DECLARE_UVERBS_NAMED_OBJECT( UVERBS_OBJECT_ASYNC_EVENT, UVERBS_TYPE_ALLOC_FD(sizeof(struct ib_uverbs_async_event_file), uverbs_async_event_destroy_uobj, &uverbs_async_event_fops, "[infinibandevent]", - O_RDONLY)); + O_RDONLY), + &UVERBS_METHOD(UVERBS_METHOD_ASYNC_EVENT_ALLOC)); const struct uapi_definition uverbs_def_obj_async_fd[] = { UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_ASYNC_EVENT), |