74e4071665
Use standard wait queues for waiting and waking up waiting threads instead of inventing our own. We still have our own wait loop because the HSA event semantics require the ability to have one thread waiting on multiple wait queues (events) at the same time. Signed-off-by: Kent Russell <kent.russell@amd.com> Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Acked-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
/*
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* Copyright 2014 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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#define KFD_EVENT_ID_NONSIGNAL_MASK 0x80000000U
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#define KFD_FIRST_NONSIGNAL_EVENT_ID KFD_EVENT_ID_NONSIGNAL_MASK
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#define KFD_LAST_NONSIGNAL_EVENT_ID UINT_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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/* All events in process, rooted at kfd_process.events. */
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struct hlist_node events;
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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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wait_queue_head_t wq; /* List of event waiters. */
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/* Only for signal events. */
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struct signal_page *signal_page;
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unsigned int signal_slot_index;
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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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};
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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(unsigned int pasid, uint32_t partial_id,
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uint32_t valid_id_bits);
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#endif
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