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
 30bool
 31nvkm_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
 38int
 39nvkm_engine_reset(struct nvkm_engine *engine)
 40{
 41	if (engine->func->reset)
 42		return engine->func->reset(engine);
 43
 44	nvkm_subdev_fini(&engine->subdev, NVKM_POWEROFF);
 45	return nvkm_subdev_init(&engine->subdev);
 46}
 47
 48void
 49nvkm_engine_unref(struct nvkm_engine **pengine)
 50{
 51	struct nvkm_engine *engine = *pengine;
 52
 53	if (engine) {
 54		nvkm_subdev_unref(&engine->subdev);
 55		*pengine = NULL;
 56	}
 57}
 58
 59struct nvkm_engine *
 60nvkm_engine_ref(struct nvkm_engine *engine)
 61{
 62	int ret;
 63
 64	if (engine) {
 65		ret = nvkm_subdev_ref(&engine->subdev);
 66		if (ret)
 67			return ERR_PTR(ret);
 68	}
 69
 70	return engine;
 71}
 72
 73void
 74nvkm_engine_tile(struct nvkm_engine *engine, int region)
 75{
 76	struct nvkm_fb *fb = engine->subdev.device->fb;
 77	if (engine->func->tile)
 78		engine->func->tile(engine, region, &fb->tile.region[region]);
 79}
 80
 81static void
 82nvkm_engine_intr(struct nvkm_subdev *subdev)
 83{
 84	struct nvkm_engine *engine = nvkm_engine(subdev);
 85	if (engine->func->intr)
 86		engine->func->intr(engine);
 87}
 88
 89static int
 90nvkm_engine_info(struct nvkm_subdev *subdev, u64 mthd, u64 *data)
 91{
 92	struct nvkm_engine *engine = nvkm_engine(subdev);
 93
 94	if (engine->func->info)
 95		return engine->func->info(engine, mthd, data);
 96
 97	return -ENOSYS;
 98}
 99
100static int
101nvkm_engine_fini(struct nvkm_subdev *subdev, enum nvkm_suspend_state suspend)
102{
103	struct nvkm_engine *engine = nvkm_engine(subdev);
104	if (engine->func->fini)
105		return engine->func->fini(engine, suspend);
106	return 0;
107}
108
109static int
110nvkm_engine_init(struct nvkm_subdev *subdev)
111{
112	struct nvkm_engine *engine = nvkm_engine(subdev);
113	struct nvkm_fb *fb = subdev->device->fb;
114	int ret = 0, i;
115
116	if (engine->func->init)
117		ret = engine->func->init(engine);
118
119	for (i = 0; fb && i < fb->tile.regions; i++)
120		nvkm_engine_tile(engine, i);
121	return ret;
122}
123
124static int
125nvkm_engine_oneinit(struct nvkm_subdev *subdev)
126{
127	struct nvkm_engine *engine = nvkm_engine(subdev);
128
129	if (engine->func->oneinit)
130		return engine->func->oneinit(engine);
131
132	return 0;
133}
134
135static int
136nvkm_engine_preinit(struct nvkm_subdev *subdev)
137{
138	struct nvkm_engine *engine = nvkm_engine(subdev);
139	if (engine->func->preinit)
140		engine->func->preinit(engine);
141	return 0;
142}
143
144static void *
145nvkm_engine_dtor(struct nvkm_subdev *subdev)
146{
147	struct nvkm_engine *engine = nvkm_engine(subdev);
148	if (engine->func->dtor)
149		return engine->func->dtor(engine);
150	return engine;
151}
152
153const struct nvkm_subdev_func
154nvkm_engine = {
155	.dtor = nvkm_engine_dtor,
156	.preinit = nvkm_engine_preinit,
157	.oneinit = nvkm_engine_oneinit,
158	.init = nvkm_engine_init,
159	.fini = nvkm_engine_fini,
160	.info = nvkm_engine_info,
161	.intr = nvkm_engine_intr,
162};
163
164int
165nvkm_engine_ctor(const struct nvkm_engine_func *func, struct nvkm_device *device,
166		 enum nvkm_subdev_type type, int inst, bool enable, struct nvkm_engine *engine)
167{
168	engine->func = func;
169	nvkm_subdev_ctor(&nvkm_engine, device, type, inst, &engine->subdev);
170	refcount_set(&engine->subdev.use.refcount, 0);
171
172	if (!nvkm_boolopt(device->cfgopt, engine->subdev.name, enable)) {
173		nvkm_debug(&engine->subdev, "disabled\n");
174		return -ENODEV;
175	}
176
177	spin_lock_init(&engine->lock);
178	return 0;
179}
180
181int
182nvkm_engine_new_(const struct nvkm_engine_func *func, struct nvkm_device *device,
183		 enum nvkm_subdev_type type, int inst, bool enable,
184		 struct nvkm_engine **pengine)
185{
186	if (!(*pengine = kzalloc(sizeof(**pengine), GFP_KERNEL)))
187		return -ENOMEM;
188	return nvkm_engine_ctor(func, device, type, inst, enable, *pengine);
189}