drivers/gpu/drm/nouveau/nvkm/core/engine.c

   1 /*
   2  * Copyright 2012 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  * Authors: Ben Skeggs
  23  */
  24 #include <core/engine.h>
  25 #include <core/device.h>
  26 #include <core/option.h>
  27
  28 #include <subdev/fb.h>
  29
  30 bool
  31 nvkm_engine_chsw_load(struct nvkm_engine *engine)
  32 {
  33         if (engine->func->chsw_load)
  34                 return engine->func->chsw_load(engine);
  35         return false;
  36 }
  37
  38 void
  39 nvkm_engine_unref(struct nvkm_engine **pengine)
  40 {
  41         struct nvkm_engine *engine = *pengine;
  42         if (engine) {
  43                 mutex_lock(&engine->subdev.mutex);
  44                 if (--engine->usecount == 0)
  45                         nvkm_subdev_fini(&engine->subdev, false);
  46                 mutex_unlock(&engine->subdev.mutex);
  47                 *pengine = NULL;
  48         }
  49 }
  50
  51 struct nvkm_engine *
  52 nvkm_engine_ref(struct nvkm_engine *engine)
  53 {
  54         if (engine) {
  55                 mutex_lock(&engine->subdev.mutex);
  56                 if (++engine->usecount == 1) {
  57                         int ret = nvkm_subdev_init(&engine->subdev);
  58                         if (ret) {
  59                                 engine->usecount--;
  60                                 mutex_unlock(&engine->subdev.mutex);
  61                                 return ERR_PTR(ret);
  62                         }
  63                 }
  64                 mutex_unlock(&engine->subdev.mutex);
  65         }
  66         return engine;
  67 }
  68
  69 void
  70 nvkm_engine_tile(struct nvkm_engine *engine, int region)
  71 {
  72         struct nvkm_fb *fb = engine->subdev.device->fb;
  73         if (engine->func->tile)
  74                 engine->func->tile(engine, region, &fb->tile.region[region]);
  75 }
  76
  77 static void
  78 nvkm_engine_intr(struct nvkm_subdev *subdev)
  79 {
  80         struct nvkm_engine *engine = nvkm_engine(subdev);
  81         if (engine->func->intr)
  82                 engine->func->intr(engine);
  83 }
  84
  85 static int
  86 nvkm_engine_fini(struct nvkm_subdev *subdev, bool suspend)
  87 {
  88         struct nvkm_engine *engine = nvkm_engine(subdev);
  89         if (engine->func->fini)
  90                 return engine->func->fini(engine, suspend);
  91         return 0;
  92 }
  93
  94 static int
  95 nvkm_engine_init(struct nvkm_subdev *subdev)
  96 {
  97         struct nvkm_engine *engine = nvkm_engine(subdev);
  98         struct nvkm_fb *fb = subdev->device->fb;
  99         int ret = 0, i;
 100         s64 time;
 101
 102         if (!engine->usecount) {
 103                 nvkm_trace(subdev, "init skipped, engine has no users\n");
 104                 return ret;
 105         }
 106
 107         if (engine->func->oneinit && !engine->subdev.oneinit) {
 108                 nvkm_trace(subdev, "one-time init running...\n");
 109                 time = ktime_to_us(ktime_get());
 110                 ret = engine->func->oneinit(engine);
 111                 if (ret) {
 112                         nvkm_trace(subdev, "one-time init failed, %d\n", ret);
 113                         return ret;
 114                 }
 115
 116                 engine->subdev.oneinit = true;
 117                 time = ktime_to_us(ktime_get()) - time;
 118                 nvkm_trace(subdev, "one-time init completed in %lldus\n", time);
 119         }
 120
 121         if (engine->func->init)
 122                 ret = engine->func->init(engine);
 123
 124         for (i = 0; fb && i < fb->tile.regions; i++)
 125                 nvkm_engine_tile(engine, i);
 126         return ret;
 127 }
 128
 129 static int
 130 nvkm_engine_preinit(struct nvkm_subdev *subdev)
 131 {
 132         struct nvkm_engine *engine = nvkm_engine(subdev);
 133         if (engine->func->preinit)
 134                 engine->func->preinit(engine);
 135         return 0;
 136 }
 137
 138 static void *
 139 nvkm_engine_dtor(struct nvkm_subdev *subdev)
 140 {
 141         struct nvkm_engine *engine = nvkm_engine(subdev);
 142         if (engine->func->dtor)
 143                 return engine->func->dtor(engine);
 144         return engine;
 145 }
 146
 147 static const struct nvkm_subdev_func
 148 nvkm_engine_func = {
 149         .dtor = nvkm_engine_dtor,
 150         .preinit = nvkm_engine_preinit,
 151         .init = nvkm_engine_init,
 152         .fini = nvkm_engine_fini,
 153         .intr = nvkm_engine_intr,
 154 };
 155
 156 int
 157 nvkm_engine_ctor(const struct nvkm_engine_func *func,
 158                  struct nvkm_device *device, int index, bool enable,
 159                  struct nvkm_engine *engine)
 160 {
 161         nvkm_subdev_ctor(&nvkm_engine_func, device, index, &engine->subdev);
 162         engine->func = func;
 163
 164         if (!nvkm_boolopt(device->cfgopt, nvkm_subdev_name[index], enable)) {
 165                 nvkm_debug(&engine->subdev, "disabled\n");
 166                 return -ENODEV;
 167         }
 168
 169         spin_lock_init(&engine->lock);
 170         return 0;
 171 }
 172
 173 int
 174 nvkm_engine_new_(const struct nvkm_engine_func *func,
 175                  struct nvkm_device *device, int index, bool enable,
 176                  struct nvkm_engine **pengine)
 177 {
 178         if (!(*pengine = kzalloc(sizeof(**pengine), GFP_KERNEL)))
 179                 return -ENOMEM;
 180         return nvkm_engine_ctor(func, device, index, enable, *pengine);
 181 }