chan.c

  1/*
  2 * Copyright 2021 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 "chan.h"
 23
 24#include <core/oproxy.h>
 25#include <core/ramht.h>
 26
 27#include <nvif/if0014.h>
 28
 29static int
 30nvkm_disp_chan_ntfy(struct nvkm_object *object, u32 type, struct nvkm_event **pevent)
 31{
 32	struct nvkm_disp_chan *chan = nvkm_disp_chan(object);
 33	struct nvkm_disp *disp = chan->disp;
 34
 35	switch (type) {
 36	case 0:
 37		*pevent = &disp->uevent;
 38		return 0;
 39	default:
 40		break;
 41	}
 42
 43	return -EINVAL;
 44}
 45
 46static int
 47nvkm_disp_chan_map(struct nvkm_object *object, void *argv, u32 argc,
 48		   enum nvkm_object_map *type, u64 *addr, u64 *size)
 49{
 50	struct nvkm_disp_chan *chan = nvkm_disp_chan(object);
 51	struct nvkm_device *device = chan->disp->engine.subdev.device;
 52	const u64 base = device->func->resource_addr(device, NVKM_BAR0_PRI);
 53
 54	*type = NVKM_OBJECT_MAP_IO;
 55	*addr = base + chan->func->user(chan, size);
 56	return 0;
 57}
 58
 59struct nvkm_disp_chan_object {
 60	struct nvkm_oproxy oproxy;
 61	struct nvkm_disp *disp;
 62	int hash;
 63};
 64
 65static void
 66nvkm_disp_chan_child_del_(struct nvkm_oproxy *base)
 67{
 68	struct nvkm_disp_chan_object *object = container_of(base, typeof(*object), oproxy);
 69
 70	nvkm_ramht_remove(object->disp->ramht, object->hash);
 71}
 72
 73static const struct nvkm_oproxy_func
 74nvkm_disp_chan_child_func_ = {
 75	.dtor[0] = nvkm_disp_chan_child_del_,
 76};
 77
 78static int
 79nvkm_disp_chan_child_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
 80			 struct nvkm_object **pobject)
 81{
 82	struct nvkm_disp_chan *chan = nvkm_disp_chan(oclass->parent);
 83	struct nvkm_disp *disp = chan->disp;
 84	struct nvkm_device *device = disp->engine.subdev.device;
 85	const struct nvkm_device_oclass *sclass = oclass->priv;
 86	struct nvkm_disp_chan_object *object;
 87	int ret;
 88
 89	if (!(object = kzalloc(sizeof(*object), GFP_KERNEL)))
 90		return -ENOMEM;
 91	nvkm_oproxy_ctor(&nvkm_disp_chan_child_func_, oclass, &object->oproxy);
 92	object->disp = disp;
 93	*pobject = &object->oproxy.base;
 94
 95	ret = sclass->ctor(device, oclass, argv, argc, &object->oproxy.object);
 96	if (ret)
 97		return ret;
 98
 99	object->hash = chan->func->bind(chan, object->oproxy.object, oclass->handle);
100	if (object->hash < 0)
101		return object->hash;
102
103	return 0;
104}
105
106static int
107nvkm_disp_chan_child_get(struct nvkm_object *object, int index, struct nvkm_oclass *sclass)
108{
109	struct nvkm_disp_chan *chan = nvkm_disp_chan(object);
110	struct nvkm_device *device = chan->disp->engine.subdev.device;
111	const struct nvkm_device_oclass *oclass = NULL;
112
113	if (chan->func->bind)
114		sclass->engine = nvkm_device_engine(device, NVKM_ENGINE_DMAOBJ, 0);
115	else
116		sclass->engine = NULL;
117
118	if (sclass->engine && sclass->engine->func->base.sclass) {
119		sclass->engine->func->base.sclass(sclass, index, &oclass);
120		if (oclass) {
121			sclass->ctor = nvkm_disp_chan_child_new;
122			sclass->priv = oclass;
123			return 0;
124		}
125	}
126
127	return -EINVAL;
128}
129
130static int
131nvkm_disp_chan_fini(struct nvkm_object *object, enum nvkm_suspend_state suspend)
132{
133	struct nvkm_disp_chan *chan = nvkm_disp_chan(object);
134
135	chan->func->fini(chan);
136	chan->func->intr(chan, false);
137	return 0;
138}
139
140static int
141nvkm_disp_chan_init(struct nvkm_object *object)
142{
143	struct nvkm_disp_chan *chan = nvkm_disp_chan(object);
144
145	chan->func->intr(chan, true);
146	return chan->func->init(chan);
147}
148
149static void *
150nvkm_disp_chan_dtor(struct nvkm_object *object)
151{
152	struct nvkm_disp_chan *chan = nvkm_disp_chan(object);
153	struct nvkm_disp *disp = chan->disp;
154
155	spin_lock(&disp->client.lock);
156	if (disp->chan[chan->chid.user] == chan)
157		disp->chan[chan->chid.user] = NULL;
158	spin_unlock(&disp->client.lock);
159
160	nvkm_memory_unref(&chan->memory);
161	return chan;
162}
163
164static const struct nvkm_object_func
165nvkm_disp_chan = {
166	.dtor = nvkm_disp_chan_dtor,
167	.init = nvkm_disp_chan_init,
168	.fini = nvkm_disp_chan_fini,
169	.ntfy = nvkm_disp_chan_ntfy,
170	.map = nvkm_disp_chan_map,
171	.sclass = nvkm_disp_chan_child_get,
172};
173
174static int
175nvkm_disp_chan_new_(struct nvkm_disp *disp, int nr, const struct nvkm_oclass *oclass,
176		    void *argv, u32 argc, struct nvkm_object **pobject)
177{
178	const struct nvkm_disp_chan_user *user = NULL;
179	struct nvkm_disp_chan *chan;
180	union nvif_disp_chan_args *args = argv;
181	int ret, i;
182
183	for (i = 0; disp->func->user[i].ctor; i++) {
184		if (disp->func->user[i].base.oclass == oclass->base.oclass) {
185			user = disp->func->user[i].chan;
186			break;
187		}
188	}
189
190	if (WARN_ON(!user))
191		return -EINVAL;
192
193	if (argc != sizeof(args->v0) || args->v0.version != 0)
194		return -ENOSYS;
195	if (args->v0.id >= nr || !args->v0.pushbuf != !user->func->push)
196		return -EINVAL;
197
198	if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
199		return -ENOMEM;
200	*pobject = &chan->object;
201
202	nvkm_object_ctor(&nvkm_disp_chan, oclass, &chan->object);
203	chan->func = user->func;
204	chan->mthd = user->mthd;
205	chan->disp = disp;
206	chan->chid.ctrl = user->ctrl + args->v0.id;
207	chan->chid.user = user->user + args->v0.id;
208	chan->head = args->v0.id;
209
210	if (chan->func->push) {
211		ret = chan->func->push(chan, args->v0.pushbuf);
212		if (ret)
213			return ret;
214	}
215
216	spin_lock(&disp->client.lock);
217	if (disp->chan[chan->chid.user]) {
218		spin_unlock(&disp->client.lock);
219		return -EBUSY;
220	}
221	disp->chan[chan->chid.user] = chan;
222	spin_unlock(&disp->client.lock);
223	return 0;
224}
225
226int
227nvkm_disp_wndw_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
228		   struct nvkm_object **pobject)
229{
230	struct nvkm_disp *disp = nvkm_udisp(oclass->parent);
231
232	return nvkm_disp_chan_new_(disp, disp->wndw.nr, oclass, argv, argc, pobject);
233}
234
235int
236nvkm_disp_chan_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
237		   struct nvkm_object **pobject)
238{
239	struct nvkm_disp *disp = nvkm_udisp(oclass->parent);
240
241	return nvkm_disp_chan_new_(disp, disp->head.nr, oclass, argv, argc, pobject);
242}
243
244int
245nvkm_disp_core_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
246		   struct nvkm_object **pobject)
247{
248	struct nvkm_disp *disp = nvkm_udisp(oclass->parent);
249
250	return nvkm_disp_chan_new_(disp, 1, oclass, argv, argc, pobject);
251}