1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
3 * Copyright 2014-2022 Advanced Micro Devices, Inc.
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10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
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24 #ifndef KFD_EVENTS_H_INCLUDED
25 #define KFD_EVENTS_H_INCLUDED
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>
33 #include <uapi/linux/kfd_ioctl.h>
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.
40 #define KFD_FIRST_NONSIGNAL_EVENT_ID ((INT_MAX >> 1) + 1)
41 #define KFD_LAST_NONSIGNAL_EVENT_ID INT_MAX
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.
49 #define UNSIGNALED_EVENT_SLOT ((uint64_t)-1)
51 struct kfd_event_waiter;
64 wait_queue_head_t wq; /* List of event waiters. */
66 /* Only for signal events. */
67 uint64_t __user *user_signal_address;
69 /* type specific data */
71 struct kfd_hsa_memory_exception_data memory_exception_data;
72 struct kfd_hsa_hw_exception_data hw_exception_data;
75 struct rcu_head rcu; /* for asynchronous kfree_rcu */
78 #define KFD_EVENT_TIMEOUT_IMMEDIATE 0
79 #define KFD_EVENT_TIMEOUT_INFINITE 0xFFFFFFFFu
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
87 extern void kfd_signal_event_interrupt(u32 pasid, uint32_t partial_id,
88 uint32_t valid_id_bits);