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_rd32(struct nvkm_object *object, u64 addr, u32 *data)
31{
32	struct nvkm_disp_chan *chan = nvkm_disp_chan(object);
33	struct nvkm_device *device = chan->disp->engine.subdev.device;
34	u64 size, base = chan->func->user(chan, &size);
35
36	*data = nvkm_rd32(device, base + addr);
37	return 0;
38}
39
40static int
41nvkm_disp_chan_wr32(struct nvkm_object *object, u64 addr, u32 data)
42{
43	struct nvkm_disp_chan *chan = nvkm_disp_chan(object);
44	struct nvkm_device *device = chan->disp->engine.subdev.device;
45	u64 size, base = chan->func->user(chan, &size);
46
47	nvkm_wr32(device, base + addr, data);
48	return 0;
49}
50
51static int
52nvkm_disp_chan_ntfy(struct nvkm_object *object, u32 type, struct nvkm_event **pevent)
53{
54	struct nvkm_disp_chan *chan = nvkm_disp_chan(object);
55	struct nvkm_disp *disp = chan->disp;
56
57	switch (type) {
58	case 0:
59		*pevent = &disp->uevent;
60		return 0;
61	default:
62		break;
63	}
64
65	return -EINVAL;
66}
67
68static int
69nvkm_disp_chan_map(struct nvkm_object *object, void *argv, u32 argc,
70		   enum nvkm_object_map *type, u64 *addr, u64 *size)
71{
72	struct nvkm_disp_chan *chan = nvkm_disp_chan(object);
73	struct nvkm_device *device = chan->disp->engine.subdev.device;
74	const u64 base = device->func->resource_addr(device, 0);
75
76	*type = NVKM_OBJECT_MAP_IO;
77	*addr = base + chan->func->user(chan, size);
78	return 0;
79}
80
81struct nvkm_disp_chan_object {
82	struct nvkm_oproxy oproxy;
83	struct nvkm_disp *disp;
84	int hash;
85};
86
87static void
88nvkm_disp_chan_child_del_(struct nvkm_oproxy *base)
89{
90	struct nvkm_disp_chan_object *object = container_of(base, typeof(*object), oproxy);
91
92	nvkm_ramht_remove(object->disp->ramht, object->hash);
93}
94
95static const struct nvkm_oproxy_func
96nvkm_disp_chan_child_func_ = {
97	.dtor[0] = nvkm_disp_chan_child_del_,
98};
99
100static int
101nvkm_disp_chan_child_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
102			 struct nvkm_object **pobject)
103{
104	struct nvkm_disp_chan *chan = nvkm_disp_chan(oclass->parent);
105	struct nvkm_disp *disp = chan->disp;
106	struct nvkm_device *device = disp->engine.subdev.device;
107	const struct nvkm_device_oclass *sclass = oclass->priv;
108	struct nvkm_disp_chan_object *object;
109	int ret;
110
111	if (!(object = kzalloc(sizeof(*object), GFP_KERNEL)))
112		return -ENOMEM;
113	nvkm_oproxy_ctor(&nvkm_disp_chan_child_func_, oclass, &object->oproxy);
114	object->disp = disp;
115	*pobject = &object->oproxy.base;
116
117	ret = sclass->ctor(device, oclass, argv, argc, &object->oproxy.object);
118	if (ret)
119		return ret;
120
121	object->hash = chan->func->bind(chan, object->oproxy.object, oclass->handle);
122	if (object->hash < 0)
123		return object->hash;
124
125	return 0;
126}
127
128static int
129nvkm_disp_chan_child_get(struct nvkm_object *object, int index, struct nvkm_oclass *sclass)
130{
131	struct nvkm_disp_chan *chan = nvkm_disp_chan(object);
132	struct nvkm_device *device = chan->disp->engine.subdev.device;
133	const struct nvkm_device_oclass *oclass = NULL;
134
135	if (chan->func->bind)
136		sclass->engine = nvkm_device_engine(device, NVKM_ENGINE_DMAOBJ, 0);
137	else
138		sclass->engine = NULL;
139
140	if (sclass->engine && sclass->engine->func->base.sclass) {
141		sclass->engine->func->base.sclass(sclass, index, &oclass);
142		if (oclass) {
143			sclass->ctor = nvkm_disp_chan_child_new;
144			sclass->priv = oclass;
145			return 0;
146		}
147	}
148
149	return -EINVAL;
150}
151
152static int
153nvkm_disp_chan_fini(struct nvkm_object *object, bool suspend)
154{
155	struct nvkm_disp_chan *chan = nvkm_disp_chan(object);
156
157	chan->func->fini(chan);
158	chan->func->intr(chan, false);
159	return 0;
160}
161
162static int
163nvkm_disp_chan_init(struct nvkm_object *object)
164{
165	struct nvkm_disp_chan *chan = nvkm_disp_chan(object);
166
167	chan->func->intr(chan, true);
168	return chan->func->init(chan);
169}
170
171static void *
172nvkm_disp_chan_dtor(struct nvkm_object *object)
173{
174	struct nvkm_disp_chan *chan = nvkm_disp_chan(object);
175	struct nvkm_disp *disp = chan->disp;
176
177	spin_lock(&disp->client.lock);
178	if (disp->chan[chan->chid.user] == chan)
179		disp->chan[chan->chid.user] = NULL;
180	spin_unlock(&disp->client.lock);
181
182	nvkm_memory_unref(&chan->memory);
183	return chan;
184}
185
186static const struct nvkm_object_func
187nvkm_disp_chan = {
188	.dtor = nvkm_disp_chan_dtor,
189	.init = nvkm_disp_chan_init,
190	.fini = nvkm_disp_chan_fini,
191	.rd32 = nvkm_disp_chan_rd32,
192	.wr32 = nvkm_disp_chan_wr32,
193	.ntfy = nvkm_disp_chan_ntfy,
194	.map = nvkm_disp_chan_map,
195	.sclass = nvkm_disp_chan_child_get,
196};
197
198static int
199nvkm_disp_chan_new_(struct nvkm_disp *disp, int nr, const struct nvkm_oclass *oclass,
200		    void *argv, u32 argc, struct nvkm_object **pobject)
201{
202	const struct nvkm_disp_chan_user *user = NULL;
203	struct nvkm_disp_chan *chan;
204	union nvif_disp_chan_args *args = argv;
205	int ret, i;
206
207	for (i = 0; disp->func->user[i].ctor; i++) {
208		if (disp->func->user[i].base.oclass == oclass->base.oclass) {
209			user = disp->func->user[i].chan;
210			break;
211		}
212	}
213
214	if (WARN_ON(!user))
215		return -EINVAL;
216
217	if (argc != sizeof(args->v0) || args->v0.version != 0)
218		return -ENOSYS;
219	if (args->v0.id >= nr || !args->v0.pushbuf != !user->func->push)
220		return -EINVAL;
221
222	if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
223		return -ENOMEM;
224	*pobject = &chan->object;
225
226	nvkm_object_ctor(&nvkm_disp_chan, oclass, &chan->object);
227	chan->func = user->func;
228	chan->mthd = user->mthd;
229	chan->disp = disp;
230	chan->chid.ctrl = user->ctrl + args->v0.id;
231	chan->chid.user = user->user + args->v0.id;
232	chan->head = args->v0.id;
233
234	if (chan->func->push) {
235		ret = chan->func->push(chan, args->v0.pushbuf);
236		if (ret)
237			return ret;
238	}
239
240	spin_lock(&disp->client.lock);
241	if (disp->chan[chan->chid.user]) {
242		spin_unlock(&disp->client.lock);
243		return -EBUSY;
244	}
245	disp->chan[chan->chid.user] = chan;
246	spin_unlock(&disp->client.lock);
247	return 0;
248}
249
250int
251nvkm_disp_wndw_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
252		   struct nvkm_object **pobject)
253{
254	struct nvkm_disp *disp = nvkm_udisp(oclass->parent);
255
256	return nvkm_disp_chan_new_(disp, disp->wndw.nr, oclass, argv, argc, pobject);
257}
258
259int
260nvkm_disp_chan_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
261		   struct nvkm_object **pobject)
262{
263	struct nvkm_disp *disp = nvkm_udisp(oclass->parent);
264
265	return nvkm_disp_chan_new_(disp, disp->head.nr, oclass, argv, argc, pobject);
266}
267
268int
269nvkm_disp_core_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
270		   struct nvkm_object **pobject)
271{
272	struct nvkm_disp *disp = nvkm_udisp(oclass->parent);
273
274	return nvkm_disp_chan_new_(disp, 1, oclass, argv, argc, pobject);
275}
276