1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * Copyright 2014 Advanced Micro Devices, Inc. 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * Permission is hereby granted, free of charge, to any person obtaining a 5*4882a593Smuzhiyun * copy of this software and associated documentation files (the "Software"), 6*4882a593Smuzhiyun * to deal in the Software without restriction, including without limitation 7*4882a593Smuzhiyun * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8*4882a593Smuzhiyun * and/or sell copies of the Software, and to permit persons to whom the 9*4882a593Smuzhiyun * Software is furnished to do so, subject to the following conditions: 10*4882a593Smuzhiyun * 11*4882a593Smuzhiyun * The above copyright notice and this permission notice shall be included in 12*4882a593Smuzhiyun * all copies or substantial portions of the Software. 13*4882a593Smuzhiyun * 14*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15*4882a593Smuzhiyun * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16*4882a593Smuzhiyun * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17*4882a593Smuzhiyun * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18*4882a593Smuzhiyun * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19*4882a593Smuzhiyun * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20*4882a593Smuzhiyun * OTHER DEALINGS IN THE SOFTWARE. 21*4882a593Smuzhiyun */ 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun #ifndef KFD_EVENTS_H_INCLUDED 24*4882a593Smuzhiyun #define KFD_EVENTS_H_INCLUDED 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun #include <linux/kernel.h> 27*4882a593Smuzhiyun #include <linux/hashtable.h> 28*4882a593Smuzhiyun #include <linux/types.h> 29*4882a593Smuzhiyun #include <linux/list.h> 30*4882a593Smuzhiyun #include <linux/wait.h> 31*4882a593Smuzhiyun #include "kfd_priv.h" 32*4882a593Smuzhiyun #include <uapi/linux/kfd_ioctl.h> 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun /* 35*4882a593Smuzhiyun * IDR supports non-negative integer IDs. Small IDs are used for 36*4882a593Smuzhiyun * signal events to match their signal slot. Use the upper half of the 37*4882a593Smuzhiyun * ID space for non-signal events. 38*4882a593Smuzhiyun */ 39*4882a593Smuzhiyun #define KFD_FIRST_NONSIGNAL_EVENT_ID ((INT_MAX >> 1) + 1) 40*4882a593Smuzhiyun #define KFD_LAST_NONSIGNAL_EVENT_ID INT_MAX 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun /* 43*4882a593Smuzhiyun * Written into kfd_signal_slot_t to indicate that the event is not signaled. 44*4882a593Smuzhiyun * Since the event protocol may need to write the event ID into memory, this 45*4882a593Smuzhiyun * must not be a valid event ID. 46*4882a593Smuzhiyun * For the sake of easy memset-ing, this must be a byte pattern. 47*4882a593Smuzhiyun */ 48*4882a593Smuzhiyun #define UNSIGNALED_EVENT_SLOT ((uint64_t)-1) 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun struct kfd_event_waiter; 51*4882a593Smuzhiyun struct signal_page; 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun struct kfd_event { 54*4882a593Smuzhiyun u32 event_id; 55*4882a593Smuzhiyun 56*4882a593Smuzhiyun bool signaled; 57*4882a593Smuzhiyun bool auto_reset; 58*4882a593Smuzhiyun 59*4882a593Smuzhiyun int type; 60*4882a593Smuzhiyun 61*4882a593Smuzhiyun wait_queue_head_t wq; /* List of event waiters. */ 62*4882a593Smuzhiyun 63*4882a593Smuzhiyun /* Only for signal events. */ 64*4882a593Smuzhiyun uint64_t __user *user_signal_address; 65*4882a593Smuzhiyun 66*4882a593Smuzhiyun /* type specific data */ 67*4882a593Smuzhiyun union { 68*4882a593Smuzhiyun struct kfd_hsa_memory_exception_data memory_exception_data; 69*4882a593Smuzhiyun struct kfd_hsa_hw_exception_data hw_exception_data; 70*4882a593Smuzhiyun }; 71*4882a593Smuzhiyun }; 72*4882a593Smuzhiyun 73*4882a593Smuzhiyun #define KFD_EVENT_TIMEOUT_IMMEDIATE 0 74*4882a593Smuzhiyun #define KFD_EVENT_TIMEOUT_INFINITE 0xFFFFFFFFu 75*4882a593Smuzhiyun 76*4882a593Smuzhiyun /* Matching HSA_EVENTTYPE */ 77*4882a593Smuzhiyun #define KFD_EVENT_TYPE_SIGNAL 0 78*4882a593Smuzhiyun #define KFD_EVENT_TYPE_HW_EXCEPTION 3 79*4882a593Smuzhiyun #define KFD_EVENT_TYPE_DEBUG 5 80*4882a593Smuzhiyun #define KFD_EVENT_TYPE_MEMORY 8 81*4882a593Smuzhiyun 82*4882a593Smuzhiyun extern void kfd_signal_event_interrupt(u32 pasid, uint32_t partial_id, 83*4882a593Smuzhiyun uint32_t valid_id_bits); 84*4882a593Smuzhiyun 85*4882a593Smuzhiyun #endif 86