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