1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2 /*
3 * Copyright (c) 2019, Mellanox Technologies inc. All rights reserved.
4 */
5
6 #include <rdma/uverbs_std_types.h>
7 #include <rdma/uverbs_ioctl.h>
8 #include "rdma_core.h"
9 #include "uverbs.h"
10
UVERBS_HANDLER(UVERBS_METHOD_ASYNC_EVENT_ALLOC)11 static int UVERBS_HANDLER(UVERBS_METHOD_ASYNC_EVENT_ALLOC)(
12 struct uverbs_attr_bundle *attrs)
13 {
14 struct ib_uobject *uobj =
15 uverbs_attr_get_uobject(attrs, UVERBS_METHOD_ASYNC_EVENT_ALLOC);
16
17 ib_uverbs_init_async_event_file(
18 container_of(uobj, struct ib_uverbs_async_event_file, uobj));
19 return 0;
20 }
21
uverbs_async_event_destroy_uobj(struct ib_uobject * uobj,enum rdma_remove_reason why)22 static int uverbs_async_event_destroy_uobj(struct ib_uobject *uobj,
23 enum rdma_remove_reason why)
24 {
25 struct ib_uverbs_async_event_file *event_file =
26 container_of(uobj, struct ib_uverbs_async_event_file, uobj);
27
28 ib_unregister_event_handler(&event_file->event_handler);
29
30 if (why == RDMA_REMOVE_DRIVER_REMOVE)
31 ib_uverbs_async_handler(event_file, 0, IB_EVENT_DEVICE_FATAL,
32 NULL, NULL);
33 return 0;
34 }
35
uverbs_async_event_release(struct inode * inode,struct file * filp)36 int uverbs_async_event_release(struct inode *inode, struct file *filp)
37 {
38 struct ib_uverbs_async_event_file *event_file;
39 struct ib_uobject *uobj = filp->private_data;
40 int ret;
41
42 if (!uobj)
43 return uverbs_uobject_fd_release(inode, filp);
44
45 event_file =
46 container_of(uobj, struct ib_uverbs_async_event_file, uobj);
47
48 /*
49 * The async event FD has to deliver IB_EVENT_DEVICE_FATAL even after
50 * disassociation, so cleaning the event list must only happen after
51 * release. The user knows it has reached the end of the event stream
52 * when it sees IB_EVENT_DEVICE_FATAL.
53 */
54 uverbs_uobject_get(uobj);
55 ret = uverbs_uobject_fd_release(inode, filp);
56 ib_uverbs_free_event_queue(&event_file->ev_queue);
57 uverbs_uobject_put(uobj);
58 return ret;
59 }
60
61 DECLARE_UVERBS_NAMED_METHOD(
62 UVERBS_METHOD_ASYNC_EVENT_ALLOC,
63 UVERBS_ATTR_FD(UVERBS_ATTR_ASYNC_EVENT_ALLOC_FD_HANDLE,
64 UVERBS_OBJECT_ASYNC_EVENT,
65 UVERBS_ACCESS_NEW,
66 UA_MANDATORY));
67
68 DECLARE_UVERBS_NAMED_OBJECT(
69 UVERBS_OBJECT_ASYNC_EVENT,
70 UVERBS_TYPE_ALLOC_FD(sizeof(struct ib_uverbs_async_event_file),
71 uverbs_async_event_destroy_uobj,
72 &uverbs_async_event_fops,
73 "[infinibandevent]",
74 O_RDONLY),
75 &UVERBS_METHOD(UVERBS_METHOD_ASYNC_EVENT_ALLOC));
76
77 const struct uapi_definition uverbs_def_obj_async_fd[] = {
78 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_ASYNC_EVENT),
79 {}
80 };
81