1 | /* SPDX-License-Identifier: GPL-2.0 OR MIT */ |
2 | /* |
3 | * Copyright 2014-2022 Advanced Micro Devices, Inc. |
4 | * |
5 | * Permission is hereby granted, free of charge, to any person obtaining a |
6 | * copy of this software and associated documentation files (the "Software"), |
7 | * to deal in the Software without restriction, including without limitation |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
9 | * and/or sell copies of the Software, and to permit persons to whom the |
10 | * Software is furnished to do so, subject to the following conditions: |
11 | * |
12 | * The above copyright notice and this permission notice shall be included in |
13 | * all copies or substantial portions of the Software. |
14 | * |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
21 | * OTHER DEALINGS IN THE SOFTWARE. |
22 | */ |
23 | |
24 | #ifndef KFD_EVENTS_H_INCLUDED |
25 | #define KFD_EVENTS_H_INCLUDED |
26 | |
27 | #include <linux/kernel.h> |
28 | #include <linux/hashtable.h> |
29 | #include <linux/types.h> |
30 | #include <linux/list.h> |
31 | #include <linux/wait.h> |
32 | #include "kfd_priv.h" |
33 | #include <uapi/linux/kfd_ioctl.h> |
34 | |
35 | /* |
36 | * IDR supports non-negative integer IDs. Small IDs are used for |
37 | * signal events to match their signal slot. Use the upper half of the |
38 | * ID space for non-signal events. |
39 | */ |
40 | #define KFD_FIRST_NONSIGNAL_EVENT_ID ((INT_MAX >> 1) + 1) |
41 | #define KFD_LAST_NONSIGNAL_EVENT_ID INT_MAX |
42 | |
43 | /* |
44 | * Written into kfd_signal_slot_t to indicate that the event is not signaled. |
45 | * Since the event protocol may need to write the event ID into memory, this |
46 | * must not be a valid event ID. |
47 | * For the sake of easy memset-ing, this must be a byte pattern. |
48 | */ |
49 | #define UNSIGNALED_EVENT_SLOT ((uint64_t)-1) |
50 | |
51 | struct kfd_event_waiter; |
52 | struct signal_page; |
53 | |
54 | struct kfd_event { |
55 | u32 event_id; |
56 | u64 event_age; |
57 | |
58 | bool signaled; |
59 | bool auto_reset; |
60 | |
61 | int type; |
62 | |
63 | spinlock_t lock; |
64 | wait_queue_head_t wq; /* List of event waiters. */ |
65 | |
66 | /* Only for signal events. */ |
67 | uint64_t __user *user_signal_address; |
68 | |
69 | /* type specific data */ |
70 | union { |
71 | struct kfd_hsa_memory_exception_data memory_exception_data; |
72 | struct kfd_hsa_hw_exception_data hw_exception_data; |
73 | }; |
74 | |
75 | struct rcu_head rcu; /* for asynchronous kfree_rcu */ |
76 | }; |
77 | |
78 | #define KFD_EVENT_TIMEOUT_IMMEDIATE 0 |
79 | #define KFD_EVENT_TIMEOUT_INFINITE 0xFFFFFFFFu |
80 | |
81 | /* Matching HSA_EVENTTYPE */ |
82 | #define KFD_EVENT_TYPE_SIGNAL 0 |
83 | #define KFD_EVENT_TYPE_HW_EXCEPTION 3 |
84 | #define KFD_EVENT_TYPE_DEBUG 5 |
85 | #define KFD_EVENT_TYPE_MEMORY 8 |
86 | |
87 | extern void kfd_signal_event_interrupt(u32 pasid, uint32_t partial_id, |
88 | uint32_t valid_id_bits); |
89 | |
90 | #endif |
91 | |