drivers/gpu/drm/nouveau/nvkm/subdev/fault/base.c

   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
  27 static void
  28 nvkm_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
  34 static void
  35 nvkm_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
  41 static int
  42 nvkm_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
  55 static const struct nvkm_event_func
  56 nvkm_fault_ntfy = {
  57         .ctor = nvkm_fault_ntfy_ctor,
  58         .init = nvkm_fault_ntfy_init,
  59         .fini = nvkm_fault_ntfy_fini,
  60 };
  61
  62 static void
  63 nvkm_fault_intr(struct nvkm_subdev *subdev)
  64 {
  65         struct nvkm_fault *fault = nvkm_fault(subdev);
  66         return fault->func->intr(fault);
  67 }
  68
  69 static int
  70 nvkm_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
  78 static int
  79 nvkm_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
  87 static int
  88 nvkm_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 = fault->func->buffer.pin(buffer);
 112         if (buffer->addr == ~0ULL)
 113                 return -EFAULT;
 114
 115         return 0;
 116 }
 117
 118 static int
 119 nvkm_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
 143 static void *
 144 nvkm_fault_dtor(struct nvkm_subdev *subdev)
 145 {
 146         struct nvkm_fault *fault = nvkm_fault(subdev);
 147         int i;
 148
 149         nvkm_notify_fini(&fault->nrpfb);
 150         nvkm_event_fini(&fault->event);
 151
 152         for (i = 0; i < fault->buffer_nr; i++) {
 153                 if (fault->buffer[i]) {
 154                         nvkm_memory_unref(&fault->buffer[i]->mem);
 155                         kfree(fault->buffer[i]);
 156                 }
 157         }
 158
 159         return fault;
 160 }
 161
 162 static const struct nvkm_subdev_func
 163 nvkm_fault = {
 164         .dtor = nvkm_fault_dtor,
 165         .oneinit = nvkm_fault_oneinit,
 166         .init = nvkm_fault_init,
 167         .fini = nvkm_fault_fini,
 168         .intr = nvkm_fault_intr,
 169 };
 170
 171 int
 172 nvkm_fault_new_(const struct nvkm_fault_func *func, struct nvkm_device *device,
 173                 int index, struct nvkm_fault **pfault)
 174 {
 175         struct nvkm_fault *fault;
 176         if (!(fault = *pfault = kzalloc(sizeof(*fault), GFP_KERNEL)))
 177                 return -ENOMEM;
 178         nvkm_subdev_ctor(&nvkm_fault, device, index, &fault->subdev);
 179         fault->func = func;
 180         fault->user.ctor = nvkm_ufault_new;
 181         fault->user.base = func->user.base;
 182         return 0;
 183 }