LXR linux/drivers/gpu/drm/amd/amdkfd/kfd

   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#include <uapi/linux/kfd_ioctl.h>
  32
  33#define KFD_EVENT_ID_NONSIGNAL_MASK 0x80000000U
  34#define KFD_FIRST_NONSIGNAL_EVENT_ID KFD_EVENT_ID_NONSIGNAL_MASK
  35#define KFD_LAST_NONSIGNAL_EVENT_ID UINT_MAX
  36
  37/*
  38 * Written into kfd_signal_slot_t to indicate that the event is not signaled.
  39 * Since the event protocol may need to write the event ID into memory, this
  40 * must not be a valid event ID.
  41 * For the sake of easy memset-ing, this must be a byte pattern.
  42 */
  43#define UNSIGNALED_EVENT_SLOT ((uint64_t)-1)
  44
  45struct kfd_event_waiter;
  46struct signal_page;
  47
  48struct kfd_event {
  49        /* All events in process, rooted at kfd_process.events. */
  50        struct hlist_node events;
  51
  52        u32 event_id;
  53
  54        bool signaled;
  55        bool auto_reset;
  56
  57        int type;
  58
  59        struct list_head waiters; /* List of kfd_event_waiter by waiters. */
  60
  61        /* Only for signal events. */
  62        struct signal_page *signal_page;
  63        unsigned int signal_slot_index;
  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
  81extern void kfd_signal_event_interrupt(unsigned int pasid, uint32_t partial_id,
  82                                        uint32_t valid_id_bits);
  83
  84#endif
  85