1 /* $NetBSD: kfd_events.h,v 1.2 2018/08/27 04:58:20 riastradh Exp $ */ 2 3 /* 4 * Copyright 2014 Advanced Micro Devices, Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 #ifndef KFD_EVENTS_H_INCLUDED 26 #define KFD_EVENTS_H_INCLUDED 27 28 #include <linux/kernel.h> 29 #include <linux/hashtable.h> 30 #include <linux/types.h> 31 #include <linux/list.h> 32 #include "kfd_priv.h" 33 #include <uapi/linux/kfd_ioctl.h> 34 35 #define KFD_EVENT_ID_NONSIGNAL_MASK 0x80000000U 36 #define KFD_FIRST_NONSIGNAL_EVENT_ID KFD_EVENT_ID_NONSIGNAL_MASK 37 #define KFD_LAST_NONSIGNAL_EVENT_ID UINT_MAX 38 39 /* 40 * Written into kfd_signal_slot_t to indicate that the event is not signaled. 41 * Since the event protocol may need to write the event ID into memory, this 42 * must not be a valid event ID. 43 * For the sake of easy memset-ing, this must be a byte pattern. 44 */ 45 #define UNSIGNALED_EVENT_SLOT ((uint64_t)-1) 46 47 struct kfd_event_waiter; 48 struct signal_page; 49 50 struct kfd_event { 51 /* All events in process, rooted at kfd_process.events. */ 52 struct hlist_node events; 53 54 u32 event_id; 55 56 bool signaled; 57 bool auto_reset; 58 59 int type; 60 61 struct list_head waiters; /* List of kfd_event_waiter by waiters. */ 62 63 /* Only for signal events. */ 64 struct signal_page *signal_page; 65 unsigned int signal_slot_index; 66 uint64_t __user *user_signal_address; 67 68 /* type specific data */ 69 union { 70 struct kfd_hsa_memory_exception_data memory_exception_data; 71 }; 72 }; 73 74 #define KFD_EVENT_TIMEOUT_IMMEDIATE 0 75 #define KFD_EVENT_TIMEOUT_INFINITE 0xFFFFFFFFu 76 77 /* Matching HSA_EVENTTYPE */ 78 #define KFD_EVENT_TYPE_SIGNAL 0 79 #define KFD_EVENT_TYPE_HW_EXCEPTION 3 80 #define KFD_EVENT_TYPE_DEBUG 5 81 #define KFD_EVENT_TYPE_MEMORY 8 82 83 extern void kfd_signal_event_interrupt(unsigned int pasid, uint32_t partial_id, 84 uint32_t valid_id_bits); 85 86 #endif 87