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