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 "kfd_priv.h"
  31
  32 #define KFD_EVENT_ID_NONSIGNAL_MASK 0x80000000U
  33 #define KFD_FIRST_NONSIGNAL_EVENT_ID KFD_EVENT_ID_NONSIGNAL_MASK
  34 #define KFD_LAST_NONSIGNAL_EVENT_ID UINT_MAX
  35
  36 /*
  37  * Written into kfd_signal_slot_t to indicate that the event is not signaled.
  38  * Since the event protocol may need to write the event ID into memory, this
  39  * must not be a valid event ID.
  40  * For the sake of easy memset-ing, this must be a byte pattern.
  41  */
  42 #define UNSIGNALED_EVENT_SLOT ((uint64_t)-1)
  43
  44 struct kfd_event_waiter;
  45 struct signal_page;
  46
  47 struct kfd_event {
  48         /* All events in process, rooted at kfd_process.events. */
  49         struct hlist_node events;
  50
  51         u32 event_id;
  52
  53         bool signaled;
  54         bool auto_reset;
  55
  56         int type;
  57
  58         struct list_head waiters; /* List of kfd_event_waiter by waiters. */
  59
  60         /* Only for signal events. */
  61         struct signal_page *signal_page;
  62         unsigned int signal_slot_index;
  63         uint64_t __user *user_signal_address;
  64 };
  65
  66 #define KFD_EVENT_TIMEOUT_IMMEDIATE 0
  67 #define KFD_EVENT_TIMEOUT_INFINITE 0xFFFFFFFFu
  68
  69 /* Matching HSA_EVENTTYPE */
  70 #define KFD_EVENT_TYPE_SIGNAL 0
  71 #define KFD_EVENT_TYPE_DEBUG 5
  72
  73 extern void kfd_signal_event_interrupt(unsigned int pasid, uint32_t partial_id,
  74                                         uint32_t valid_id_bits);
  75
  76 #endif