drivers/gpu/drm/amd/amdkfd/kfd_events.h

   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                 struct kfd_hsa_hw_exception_data hw_exception_data;
  70         };
  71 };
  72
  73 #define KFD_EVENT_TIMEOUT_IMMEDIATE 0
  74 #define KFD_EVENT_TIMEOUT_INFINITE 0xFFFFFFFFu
  75
  76 /* Matching HSA_EVENTTYPE */
  77 #define KFD_EVENT_TYPE_SIGNAL 0
  78 #define KFD_EVENT_TYPE_HW_EXCEPTION 3
  79 #define KFD_EVENT_TYPE_DEBUG 5
  80 #define KFD_EVENT_TYPE_MEMORY 8
  81
  82 extern void kfd_signal_event_interrupt(u32 pasid, uint32_t partial_id,
  83                                        uint32_t valid_id_bits);
  84
  85 #endif