linux/drivers/gpu/drm/nouveau/nvkm/subdev/fault/base.c
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   1/*
   2 * Copyright 2018 Red Hat 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#include "priv.h"
  23
  24#include <core/memory.h>
  25#include <core/notify.h>
  26
  27static void
  28nvkm_fault_ntfy_fini(struct nvkm_event *event, int type, int index)
  29{
  30        struct nvkm_fault *fault = container_of(event, typeof(*fault), event);
  31        fault->func->buffer.intr(fault->buffer[index], false);
  32}
  33
  34static void
  35nvkm_fault_ntfy_init(struct nvkm_event *event, int type, int index)
  36{
  37        struct nvkm_fault *fault = container_of(event, typeof(*fault), event);
  38        fault->func->buffer.intr(fault->buffer[index], true);
  39}
  40
  41static int
  42nvkm_fault_ntfy_ctor(struct nvkm_object *object, void *argv, u32 argc,
  43                     struct nvkm_notify *notify)
  44{
  45        struct nvkm_fault_buffer *buffer = nvkm_fault_buffer(object);
  46        if (argc == 0) {
  47                notify->size  = 0;
  48                notify->types = 1;
  49                notify->index = buffer->id;
  50                return 0;
  51        }
  52        return -ENOSYS;
  53}
  54
  55static const struct nvkm_event_func
  56nvkm_fault_ntfy = {
  57        .ctor = nvkm_fault_ntfy_ctor,
  58        .init = nvkm_fault_ntfy_init,
  59        .fini = nvkm_fault_ntfy_fini,
  60};
  61
  62static void
  63nvkm_fault_intr(struct nvkm_subdev *subdev)
  64{
  65        struct nvkm_fault *fault = nvkm_fault(subdev);
  66        return fault->func->intr(fault);
  67}
  68
  69static int
  70nvkm_fault_fini(struct nvkm_subdev *subdev, bool suspend)
  71{
  72        struct nvkm_fault *fault = nvkm_fault(subdev);
  73        if (fault->func->fini)
  74                fault->func->fini(fault);
  75        return 0;
  76}
  77
  78static int
  79nvkm_fault_init(struct nvkm_subdev *subdev)
  80{
  81        struct nvkm_fault *fault = nvkm_fault(subdev);
  82        if (fault->func->init)
  83                fault->func->init(fault);
  84        return 0;
  85}
  86
  87static int
  88nvkm_fault_oneinit_buffer(struct nvkm_fault *fault, int id)
  89{
  90        struct nvkm_subdev *subdev = &fault->subdev;
  91        struct nvkm_device *device = subdev->device;
  92        struct nvkm_fault_buffer *buffer;
  93        int ret;
  94
  95        if (!(buffer = kzalloc(sizeof(*buffer), GFP_KERNEL)))
  96                return -ENOMEM;
  97        buffer->fault = fault;
  98        buffer->id = id;
  99        fault->func->buffer.info(buffer);
 100        fault->buffer[id] = buffer;
 101
 102        nvkm_debug(subdev, "buffer %d: %d entries\n", id, buffer->entries);
 103
 104        ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, buffer->entries *
 105                              fault->func->buffer.entry_size, 0x1000, true,
 106                              &buffer->mem);
 107        if (ret)
 108                return ret;
 109
 110        /* Pin fault buffer in BAR2. */
 111        buffer->addr = nvkm_memory_bar2(buffer->mem);
 112        if (buffer->addr == ~0ULL)
 113                return -EFAULT;
 114
 115        return 0;
 116}
 117
 118static int
 119nvkm_fault_oneinit(struct nvkm_subdev *subdev)
 120{
 121        struct nvkm_fault *fault = nvkm_fault(subdev);
 122        int ret, i;
 123
 124        for (i = 0; i < ARRAY_SIZE(fault->buffer); i++) {
 125                if (i < fault->func->buffer.nr) {
 126                        ret = nvkm_fault_oneinit_buffer(fault, i);
 127                        if (ret)
 128                                return ret;
 129                        fault->buffer_nr = i + 1;
 130                }
 131        }
 132
 133        ret = nvkm_event_init(&nvkm_fault_ntfy, 1, fault->buffer_nr,
 134                              &fault->event);
 135        if (ret)
 136                return ret;
 137
 138        if (fault->func->oneinit)
 139                ret = fault->func->oneinit(fault);
 140        return ret;
 141}
 142
 143static void *
 144nvkm_fault_dtor(struct nvkm_subdev *subdev)
 145{
 146        struct nvkm_fault *fault = nvkm_fault(subdev);
 147        int i;
 148
 149        nvkm_event_fini(&fault->event);
 150
 151        for (i = 0; i < fault->buffer_nr; i++) {
 152                if (fault->buffer[i]) {
 153                        nvkm_memory_unref(&fault->buffer[i]->mem);
 154                        kfree(fault->buffer[i]);
 155                }
 156        }
 157
 158        return fault;
 159}
 160
 161static const struct nvkm_subdev_func
 162nvkm_fault = {
 163        .dtor = nvkm_fault_dtor,
 164        .oneinit = nvkm_fault_oneinit,
 165        .init = nvkm_fault_init,
 166        .fini = nvkm_fault_fini,
 167        .intr = nvkm_fault_intr,
 168};
 169
 170int
 171nvkm_fault_new_(const struct nvkm_fault_func *func, struct nvkm_device *device,
 172                int index, struct nvkm_fault **pfault)
 173{
 174        struct nvkm_fault *fault;
 175        if (!(fault = *pfault = kzalloc(sizeof(*fault), GFP_KERNEL)))
 176                return -ENOMEM;
 177        nvkm_subdev_ctor(&nvkm_fault, device, index, &fault->subdev);
 178        fault->func = func;
 179        return 0;
 180}
 181