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/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/*
* Copyright 2014-2022 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef KFD_EVENTS_H_INCLUDED
#define KFD_EVENTS_H_INCLUDED
#include <linux/kernel.h>
#include <linux/hashtable.h>
#include <linux/types.h>
#include <linux/list.h>
#include <linux/wait.h>
#include "kfd_priv.h"
#include <uapi/linux/kfd_ioctl.h>
/*
* IDR supports non-negative integer IDs. Small IDs are used for
* signal events to match their signal slot. Use the upper half of the
* ID space for non-signal events.
*/
#define KFD_FIRST_NONSIGNAL_EVENT_ID ((INT_MAX >> 1) + 1)
#define KFD_LAST_NONSIGNAL_EVENT_ID INT_MAX
/*
* Written into kfd_signal_slot_t to indicate that the event is not signaled.
* Since the event protocol may need to write the event ID into memory, this
* must not be a valid event ID.
* For the sake of easy memset-ing, this must be a byte pattern.
*/
#define UNSIGNALED_EVENT_SLOT ((uint64_t)-1)
struct kfd_event_waiter;
struct signal_page;
struct kfd_event {
u32 event_id;
u64 event_age;
bool signaled;
bool auto_reset;
int type;
spinlock_t lock;
wait_queue_head_t wq; /* List of event waiters. */
/* Only for signal events. */
uint64_t __user *user_signal_address;
/* type specific data */
union {
struct kfd_hsa_memory_exception_data memory_exception_data;
struct kfd_hsa_hw_exception_data hw_exception_data;
};
struct rcu_head rcu; /* for asynchronous kfree_rcu */
};
#define KFD_EVENT_TIMEOUT_IMMEDIATE 0
#define KFD_EVENT_TIMEOUT_INFINITE 0xFFFFFFFFu
/* Matching HSA_EVENTTYPE */
#define KFD_EVENT_TYPE_SIGNAL 0
#define KFD_EVENT_TYPE_HW_EXCEPTION 3
#define KFD_EVENT_TYPE_DEBUG 5
#define KFD_EVENT_TYPE_MEMORY 8
extern void kfd_signal_event_interrupt(u32 pasid, uint32_t partial_id,
uint32_t valid_id_bits);
#endif
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