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f3a39818 AL |
1 | /* |
2 | * Copyright 2014 Advanced Micro Devices, Inc. | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included in | |
12 | * all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
20 | * OTHER DEALINGS IN THE SOFTWARE. | |
21 | */ | |
22 | ||
23 | #ifndef KFD_EVENTS_H_INCLUDED | |
24 | #define KFD_EVENTS_H_INCLUDED | |
25 | ||
26 | #include <linux/kernel.h> | |
27 | #include <linux/hashtable.h> | |
28 | #include <linux/types.h> | |
29 | #include <linux/list.h> | |
30 | #include "kfd_priv.h" | |
31 | ||
32 | #define KFD_EVENT_ID_NONSIGNAL_MASK 0x80000000U | |
33 | #define KFD_FIRST_NONSIGNAL_EVENT_ID KFD_EVENT_ID_NONSIGNAL_MASK | |
34 | #define KFD_LAST_NONSIGNAL_EVENT_ID UINT_MAX | |
35 | ||
36 | /* | |
37 | * Written into kfd_signal_slot_t to indicate that the event is not signaled. | |
38 | * Since the event protocol may need to write the event ID into memory, this | |
39 | * must not be a valid event ID. | |
40 | * For the sake of easy memset-ing, this must be a byte pattern. | |
41 | */ | |
42 | #define UNSIGNALED_EVENT_SLOT ((uint64_t)-1) | |
43 | ||
44 | struct kfd_event_waiter; | |
45 | struct signal_page; | |
46 | ||
47 | struct kfd_event { | |
48 | /* All events in process, rooted at kfd_process.events. */ | |
49 | struct hlist_node events; | |
50 | ||
51 | u32 event_id; | |
52 | ||
53 | bool signaled; | |
54 | bool auto_reset; | |
55 | ||
56 | int type; | |
57 | ||
58 | struct list_head waiters; /* List of kfd_event_waiter by waiters. */ | |
59 | ||
60 | /* Only for signal events. */ | |
61 | struct signal_page *signal_page; | |
62 | unsigned int signal_slot_index; | |
63 | uint64_t __user *user_signal_address; | |
64 | }; | |
65 | ||
66 | #define KFD_EVENT_TIMEOUT_IMMEDIATE 0 | |
67 | #define KFD_EVENT_TIMEOUT_INFINITE 0xFFFFFFFFu | |
68 | ||
69 | /* Matching HSA_EVENTTYPE */ | |
70 | #define KFD_EVENT_TYPE_SIGNAL 0 | |
71 | #define KFD_EVENT_TYPE_DEBUG 5 | |
72 | ||
73 | extern void kfd_signal_event_interrupt(unsigned int pasid, uint32_t partial_id, | |
74 | uint32_t valid_id_bits); | |
75 | ||
76 | #endif |