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 "priv.h"
25 #include "chan.h"
26 
27 #include <core/client.h>
28 #include <core/gpuobj.h>
29 #include <core/notify.h>
30 #include <subdev/mc.h>
31 
32 #include <nvif/event.h>
33 #include <nvif/cl0080.h>
34 #include <nvif/unpack.h>
35 
36 void
37 nvkm_fifo_recover_chan(struct nvkm_fifo *fifo, int chid)
38 {
39 	unsigned long flags;
40 	if (WARN_ON(!fifo->func->recover_chan))
41 		return;
42 	spin_lock_irqsave(&fifo->lock, flags);
43 	fifo->func->recover_chan(fifo, chid);
44 	spin_unlock_irqrestore(&fifo->lock, flags);
45 }
46 
47 void
48 nvkm_fifo_pause(struct nvkm_fifo *fifo, unsigned long *flags)
49 {
50 	return fifo->func->pause(fifo, flags);
51 }
52 
53 void
54 nvkm_fifo_start(struct nvkm_fifo *fifo, unsigned long *flags)
55 {
56 	return fifo->func->start(fifo, flags);
57 }
58 
59 void
60 nvkm_fifo_fault(struct nvkm_fifo *fifo, struct nvkm_fault_data *info)
61 {
62 	return fifo->func->fault(fifo, info);
63 }
64 
65 void
66 nvkm_fifo_chan_put(struct nvkm_fifo *fifo, unsigned long flags,
67 		   struct nvkm_fifo_chan **pchan)
68 {
69 	struct nvkm_fifo_chan *chan = *pchan;
70 	if (likely(chan)) {
71 		*pchan = NULL;
72 		spin_unlock_irqrestore(&fifo->lock, flags);
73 	}
74 }
75 
76 struct nvkm_fifo_chan *
77 nvkm_fifo_chan_inst_locked(struct nvkm_fifo *fifo, u64 inst)
78 {
79 	struct nvkm_fifo_chan *chan;
80 	list_for_each_entry(chan, &fifo->chan, head) {
81 		if (chan->inst->addr == inst) {
82 			list_del(&chan->head);
83 			list_add(&chan->head, &fifo->chan);
84 			return chan;
85 		}
86 	}
87 	return NULL;
88 }
89 
90 struct nvkm_fifo_chan *
91 nvkm_fifo_chan_inst(struct nvkm_fifo *fifo, u64 inst, unsigned long *rflags)
92 {
93 	struct nvkm_fifo_chan *chan;
94 	unsigned long flags;
95 	spin_lock_irqsave(&fifo->lock, flags);
96 	if ((chan = nvkm_fifo_chan_inst_locked(fifo, inst))) {
97 		*rflags = flags;
98 		return chan;
99 	}
100 	spin_unlock_irqrestore(&fifo->lock, flags);
101 	return NULL;
102 }
103 
104 struct nvkm_fifo_chan *
105 nvkm_fifo_chan_chid(struct nvkm_fifo *fifo, int chid, unsigned long *rflags)
106 {
107 	struct nvkm_fifo_chan *chan;
108 	unsigned long flags;
109 	spin_lock_irqsave(&fifo->lock, flags);
110 	list_for_each_entry(chan, &fifo->chan, head) {
111 		if (chan->chid == chid) {
112 			list_del(&chan->head);
113 			list_add(&chan->head, &fifo->chan);
114 			*rflags = flags;
115 			return chan;
116 		}
117 	}
118 	spin_unlock_irqrestore(&fifo->lock, flags);
119 	return NULL;
120 }
121 
122 void
123 nvkm_fifo_kevent(struct nvkm_fifo *fifo, int chid)
124 {
125 	nvkm_event_send(&fifo->kevent, 1, chid, NULL, 0);
126 }
127 
128 static int
129 nvkm_fifo_kevent_ctor(struct nvkm_object *object, void *data, u32 size,
130 		      struct nvkm_notify *notify)
131 {
132 	struct nvkm_fifo_chan *chan = nvkm_fifo_chan(object);
133 	if (size == 0) {
134 		notify->size  = 0;
135 		notify->types = 1;
136 		notify->index = chan->chid;
137 		return 0;
138 	}
139 	return -ENOSYS;
140 }
141 
142 static const struct nvkm_event_func
143 nvkm_fifo_kevent_func = {
144 	.ctor = nvkm_fifo_kevent_ctor,
145 };
146 
147 static int
148 nvkm_fifo_cevent_ctor(struct nvkm_object *object, void *data, u32 size,
149 		      struct nvkm_notify *notify)
150 {
151 	if (size == 0) {
152 		notify->size  = 0;
153 		notify->types = 1;
154 		notify->index = 0;
155 		return 0;
156 	}
157 	return -ENOSYS;
158 }
159 
160 static const struct nvkm_event_func
161 nvkm_fifo_cevent_func = {
162 	.ctor = nvkm_fifo_cevent_ctor,
163 };
164 
165 void
166 nvkm_fifo_cevent(struct nvkm_fifo *fifo)
167 {
168 	nvkm_event_send(&fifo->cevent, 1, 0, NULL, 0);
169 }
170 
171 static void
172 nvkm_fifo_uevent_fini(struct nvkm_event *event, int type, int index)
173 {
174 	struct nvkm_fifo *fifo = container_of(event, typeof(*fifo), uevent);
175 	fifo->func->uevent_fini(fifo);
176 }
177 
178 static void
179 nvkm_fifo_uevent_init(struct nvkm_event *event, int type, int index)
180 {
181 	struct nvkm_fifo *fifo = container_of(event, typeof(*fifo), uevent);
182 	fifo->func->uevent_init(fifo);
183 }
184 
185 static int
186 nvkm_fifo_uevent_ctor(struct nvkm_object *object, void *data, u32 size,
187 		      struct nvkm_notify *notify)
188 {
189 	union {
190 		struct nvif_notify_uevent_req none;
191 	} *req = data;
192 	int ret = -ENOSYS;
193 
194 	if (!(ret = nvif_unvers(ret, &data, &size, req->none))) {
195 		notify->size  = sizeof(struct nvif_notify_uevent_rep);
196 		notify->types = 1;
197 		notify->index = 0;
198 	}
199 
200 	return ret;
201 }
202 
203 static const struct nvkm_event_func
204 nvkm_fifo_uevent_func = {
205 	.ctor = nvkm_fifo_uevent_ctor,
206 	.init = nvkm_fifo_uevent_init,
207 	.fini = nvkm_fifo_uevent_fini,
208 };
209 
210 void
211 nvkm_fifo_uevent(struct nvkm_fifo *fifo)
212 {
213 	struct nvif_notify_uevent_rep rep = {
214 	};
215 	nvkm_event_send(&fifo->uevent, 1, 0, &rep, sizeof(rep));
216 }
217 
218 static int
219 nvkm_fifo_class_new_(struct nvkm_device *device,
220 		     const struct nvkm_oclass *oclass, void *data, u32 size,
221 		     struct nvkm_object **pobject)
222 {
223 	struct nvkm_fifo *fifo = nvkm_fifo(oclass->engine);
224 	return fifo->func->class_new(fifo, oclass, data, size, pobject);
225 }
226 
227 static const struct nvkm_device_oclass
228 nvkm_fifo_class_ = {
229 	.ctor = nvkm_fifo_class_new_,
230 };
231 
232 static int
233 nvkm_fifo_class_new(struct nvkm_device *device,
234 		    const struct nvkm_oclass *oclass, void *data, u32 size,
235 		    struct nvkm_object **pobject)
236 {
237 	const struct nvkm_fifo_chan_oclass *sclass = oclass->engn;
238 	struct nvkm_fifo *fifo = nvkm_fifo(oclass->engine);
239 	return sclass->ctor(fifo, oclass, data, size, pobject);
240 }
241 
242 static const struct nvkm_device_oclass
243 nvkm_fifo_class = {
244 	.ctor = nvkm_fifo_class_new,
245 };
246 
247 static int
248 nvkm_fifo_class_get(struct nvkm_oclass *oclass, int index,
249 		    const struct nvkm_device_oclass **class)
250 {
251 	struct nvkm_fifo *fifo = nvkm_fifo(oclass->engine);
252 	const struct nvkm_fifo_chan_oclass *sclass;
253 	int c = 0;
254 
255 	if (fifo->func->class_get) {
256 		int ret = fifo->func->class_get(fifo, index, oclass);
257 		if (ret == 0)
258 			*class = &nvkm_fifo_class_;
259 		return ret;
260 	}
261 
262 	while ((sclass = fifo->func->chan[c])) {
263 		if (c++ == index) {
264 			oclass->base = sclass->base;
265 			oclass->engn = sclass;
266 			*class = &nvkm_fifo_class;
267 			return 0;
268 		}
269 	}
270 
271 	return c;
272 }
273 
274 static void
275 nvkm_fifo_intr(struct nvkm_engine *engine)
276 {
277 	struct nvkm_fifo *fifo = nvkm_fifo(engine);
278 	fifo->func->intr(fifo);
279 }
280 
281 static int
282 nvkm_fifo_fini(struct nvkm_engine *engine, bool suspend)
283 {
284 	struct nvkm_fifo *fifo = nvkm_fifo(engine);
285 	if (fifo->func->fini)
286 		fifo->func->fini(fifo);
287 	return 0;
288 }
289 
290 static int
291 nvkm_fifo_info(struct nvkm_engine *engine, u64 mthd, u64 *data)
292 {
293 	struct nvkm_fifo *fifo = nvkm_fifo(engine);
294 	switch (mthd) {
295 	case NV_DEVICE_FIFO_CHANNELS: *data = fifo->nr; return 0;
296 	default:
297 		if (fifo->func->info)
298 			return fifo->func->info(fifo, mthd, data);
299 		break;
300 	}
301 	return -ENOSYS;
302 }
303 
304 static int
305 nvkm_fifo_oneinit(struct nvkm_engine *engine)
306 {
307 	struct nvkm_fifo *fifo = nvkm_fifo(engine);
308 	if (fifo->func->oneinit)
309 		return fifo->func->oneinit(fifo);
310 	return 0;
311 }
312 
313 static void
314 nvkm_fifo_preinit(struct nvkm_engine *engine)
315 {
316 	nvkm_mc_reset(engine->subdev.device, NVKM_ENGINE_FIFO);
317 }
318 
319 static int
320 nvkm_fifo_init(struct nvkm_engine *engine)
321 {
322 	struct nvkm_fifo *fifo = nvkm_fifo(engine);
323 	fifo->func->init(fifo);
324 	return 0;
325 }
326 
327 static void *
328 nvkm_fifo_dtor(struct nvkm_engine *engine)
329 {
330 	struct nvkm_fifo *fifo = nvkm_fifo(engine);
331 	void *data = fifo;
332 	if (fifo->func->dtor)
333 		data = fifo->func->dtor(fifo);
334 	nvkm_event_fini(&fifo->kevent);
335 	nvkm_event_fini(&fifo->cevent);
336 	nvkm_event_fini(&fifo->uevent);
337 	return data;
338 }
339 
340 static const struct nvkm_engine_func
341 nvkm_fifo = {
342 	.dtor = nvkm_fifo_dtor,
343 	.preinit = nvkm_fifo_preinit,
344 	.oneinit = nvkm_fifo_oneinit,
345 	.info = nvkm_fifo_info,
346 	.init = nvkm_fifo_init,
347 	.fini = nvkm_fifo_fini,
348 	.intr = nvkm_fifo_intr,
349 	.base.sclass = nvkm_fifo_class_get,
350 };
351 
352 int
353 nvkm_fifo_ctor(const struct nvkm_fifo_func *func, struct nvkm_device *device,
354 	       int index, int nr, struct nvkm_fifo *fifo)
355 {
356 	int ret;
357 
358 	fifo->func = func;
359 	INIT_LIST_HEAD(&fifo->chan);
360 	spin_lock_init(&fifo->lock);
361 
362 	if (WARN_ON(fifo->nr > NVKM_FIFO_CHID_NR))
363 		fifo->nr = NVKM_FIFO_CHID_NR;
364 	else
365 		fifo->nr = nr;
366 	bitmap_clear(fifo->mask, 0, fifo->nr);
367 
368 	ret = nvkm_engine_ctor(&nvkm_fifo, device, index, true, &fifo->engine);
369 	if (ret)
370 		return ret;
371 
372 	if (func->uevent_init) {
373 		ret = nvkm_event_init(&nvkm_fifo_uevent_func, 1, 1,
374 				      &fifo->uevent);
375 		if (ret)
376 			return ret;
377 	}
378 
379 	ret = nvkm_event_init(&nvkm_fifo_cevent_func, 1, 1, &fifo->cevent);
380 	if (ret)
381 		return ret;
382 
383 	return nvkm_event_init(&nvkm_fifo_kevent_func, 1, nr, &fifo->kevent);
384 }
385