/* 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.
*/
/* * 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 */
};
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