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 #include "chid.h"
27 #include "runl.h"
28 #include "runq.h"
29 
30 #include <core/gpuobj.h>
31 #include <subdev/bar.h>
32 #include <subdev/mc.h>
33 #include <subdev/mmu.h>
34 
35 #include <nvif/cl0080.h>
36 #include <nvif/unpack.h>
37 
38 bool
39 nvkm_fifo_ctxsw_in_progress(struct nvkm_engine *engine)
40 {
41 	struct nvkm_runl *runl;
42 	struct nvkm_engn *engn;
43 
44 	nvkm_runl_foreach(runl, engine->subdev.device->fifo) {
45 		nvkm_runl_foreach_engn(engn, runl) {
46 			if (engn->engine == engine)
47 				return engn->func->chsw ? engn->func->chsw(engn) : false;
48 		}
49 	}
50 
51 	return false;
52 }
53 
54 void
55 nvkm_fifo_pause(struct nvkm_fifo *fifo, unsigned long *flags)
56 {
57 	return fifo->func->pause(fifo, flags);
58 }
59 
60 void
61 nvkm_fifo_start(struct nvkm_fifo *fifo, unsigned long *flags)
62 {
63 	return fifo->func->start(fifo, flags);
64 }
65 
66 void
67 nvkm_fifo_fault(struct nvkm_fifo *fifo, struct nvkm_fault_data *info)
68 {
69 	return fifo->func->mmu_fault->recover(fifo, info);
70 }
71 
72 static int
73 nvkm_fifo_class_new(struct nvkm_device *device, const struct nvkm_oclass *oclass,
74 		    void *argv, u32 argc, struct nvkm_object **pobject)
75 {
76 	struct nvkm_fifo *fifo = nvkm_fifo(oclass->engine);
77 
78 	if (oclass->engn == &fifo->func->cgrp.user)
79 		return nvkm_ucgrp_new(fifo, oclass, argv, argc, pobject);
80 
81 	if (oclass->engn == &fifo->func->chan.user)
82 		return nvkm_uchan_new(fifo, NULL, oclass, argv, argc, pobject);
83 
84 	WARN_ON(1);
85 	return -ENOSYS;
86 }
87 
88 static const struct nvkm_device_oclass
89 nvkm_fifo_class = {
90 	.ctor = nvkm_fifo_class_new,
91 };
92 
93 static int
94 nvkm_fifo_class_get(struct nvkm_oclass *oclass, int index, const struct nvkm_device_oclass **class)
95 {
96 	struct nvkm_fifo *fifo = nvkm_fifo(oclass->engine);
97 	const struct nvkm_fifo_func_cgrp *cgrp = &fifo->func->cgrp;
98 	const struct nvkm_fifo_func_chan *chan = &fifo->func->chan;
99 	int c = 0;
100 
101 	/* *_CHANNEL_GROUP_* */
102 	if (cgrp->user.oclass) {
103 		if (c++ == index) {
104 			oclass->base = cgrp->user;
105 			oclass->engn = &fifo->func->cgrp.user;
106 			*class = &nvkm_fifo_class;
107 			return 0;
108 		}
109 	}
110 
111 	/* *_CHANNEL_DMA, *_CHANNEL_GPFIFO_* */
112 	if (chan->user.oclass) {
113 		if (c++ == index) {
114 			oclass->base = chan->user;
115 			oclass->engn = &fifo->func->chan.user;
116 			*class = &nvkm_fifo_class;
117 			return 0;
118 		}
119 	}
120 
121 	return c;
122 }
123 
124 static int
125 nvkm_fifo_fini(struct nvkm_engine *engine, bool suspend)
126 {
127 	struct nvkm_fifo *fifo = nvkm_fifo(engine);
128 	struct nvkm_runl *runl;
129 
130 	nvkm_inth_block(&fifo->engine.subdev.inth);
131 
132 	nvkm_runl_foreach(runl, fifo)
133 		nvkm_runl_fini(runl);
134 
135 	return 0;
136 }
137 
138 static int
139 nvkm_fifo_init(struct nvkm_engine *engine)
140 {
141 	struct nvkm_fifo *fifo = nvkm_fifo(engine);
142 	struct nvkm_runq *runq;
143 	struct nvkm_runl *runl;
144 	u32 mask = 0;
145 
146 	if (fifo->func->init_pbdmas) {
147 		nvkm_runq_foreach(runq, fifo)
148 			mask |= BIT(runq->id);
149 
150 		fifo->func->init_pbdmas(fifo, mask);
151 
152 		nvkm_runq_foreach(runq, fifo)
153 			runq->func->init(runq);
154 	}
155 
156 	nvkm_runl_foreach(runl, fifo) {
157 		if (runl->func->init)
158 			runl->func->init(runl);
159 	}
160 
161 	if (fifo->func->init)
162 		fifo->func->init(fifo);
163 
164 	nvkm_inth_allow(&fifo->engine.subdev.inth);
165 	return 0;
166 }
167 
168 static int
169 nvkm_fifo_info(struct nvkm_engine *engine, u64 mthd, u64 *data)
170 {
171 	struct nvkm_fifo *fifo = nvkm_fifo(engine);
172 	struct nvkm_runl *runl;
173 	struct nvkm_engn *engn;
174 	int ret;
175 
176 	ret = nvkm_subdev_oneinit(&fifo->engine.subdev);
177 	if (ret)
178 		return ret;
179 
180 	switch (mthd) {
181 	case NV_DEVICE_HOST_CHANNELS: *data = fifo->chid ? fifo->chid->nr : 0; return 0;
182 	case NV_DEVICE_HOST_RUNLISTS:
183 		*data = 0;
184 		nvkm_runl_foreach(runl, fifo)
185 			*data |= BIT(runl->id);
186 		return 0;
187 	case NV_DEVICE_HOST_RUNLIST_ENGINES:
188 		runl = nvkm_runl_get(fifo, *data, 0);
189 		if (runl) {
190 			*data = 0;
191 			nvkm_runl_foreach_engn(engn, runl) {
192 #define CASE(n) case NVKM_ENGINE_##n: *data |= NV_DEVICE_HOST_RUNLIST_ENGINES_##n; break
193 				switch (engn->engine->subdev.type) {
194 				case NVKM_ENGINE_DMAOBJ:
195 					break;
196 				CASE(SW    );
197 				CASE(GR    );
198 				CASE(MPEG  );
199 				CASE(ME    );
200 				CASE(CIPHER);
201 				CASE(BSP   );
202 				CASE(VP    );
203 				CASE(CE    );
204 				CASE(SEC   );
205 				CASE(MSVLD );
206 				CASE(MSPDEC);
207 				CASE(MSPPP );
208 				CASE(MSENC );
209 				CASE(VIC   );
210 				CASE(SEC2  );
211 				CASE(NVDEC );
212 				CASE(NVENC );
213 				default:
214 					WARN_ON(1);
215 					break;
216 				}
217 #undef CASE
218 			}
219 			return 0;
220 		}
221 		return -EINVAL;
222 	case NV_DEVICE_HOST_RUNLIST_CHANNELS:
223 		if (!fifo->chid) {
224 			runl = nvkm_runl_get(fifo, *data, 0);
225 			if (runl) {
226 				*data = runl->chid->nr;
227 				return 0;
228 			}
229 		}
230 		return -EINVAL;
231 	default:
232 		break;
233 	}
234 
235 	return -ENOSYS;
236 }
237 
238 static int
239 nvkm_fifo_oneinit(struct nvkm_engine *engine)
240 {
241 	struct nvkm_subdev *subdev = &engine->subdev;
242 	struct nvkm_device *device = subdev->device;
243 	struct nvkm_fifo *fifo = nvkm_fifo(engine);
244 	struct nvkm_runl *runl;
245 	struct nvkm_engn *engn;
246 	int ret, nr, i;
247 
248 	/* Initialise CHID/CGID allocator(s) on GPUs where they aren't per-runlist. */
249 	if (fifo->func->chid_nr) {
250 		ret = fifo->func->chid_ctor(fifo, fifo->func->chid_nr(fifo));
251 		if (ret)
252 			return ret;
253 	}
254 
255 	/* Create runqueues for each PBDMA. */
256 	if (fifo->func->runq_nr) {
257 		for (nr = fifo->func->runq_nr(fifo), i = 0; i < nr; i++) {
258 			if (!nvkm_runq_new(fifo, i))
259 				return -ENOMEM;
260 		}
261 	}
262 
263 	/* Create runlists. */
264 	ret = fifo->func->runl_ctor(fifo);
265 	if (ret)
266 		return ret;
267 
268 	nvkm_runl_foreach(runl, fifo) {
269 		RUNL_DEBUG(runl, "chan:%06x", runl->chan);
270 		nvkm_runl_foreach_engn(engn, runl) {
271 			ENGN_DEBUG(engn, "");
272 		}
273 	}
274 
275 	/* Register interrupt handler. */
276 	if (fifo->func->intr) {
277 		ret = nvkm_inth_add(&device->mc->intr, NVKM_INTR_SUBDEV, NVKM_INTR_PRIO_NORMAL,
278 				    subdev, fifo->func->intr, &subdev->inth);
279 		if (ret) {
280 			nvkm_error(subdev, "intr %d\n", ret);
281 			return ret;
282 		}
283 	}
284 
285 	/* Initialise non-stall intr handling. */
286 	if (fifo->func->nonstall) {
287 		if (fifo->func->nonstall_ctor) {
288 			ret = fifo->func->nonstall_ctor(fifo);
289 			if (ret < 0) {
290 				nvkm_error(subdev, "nonstall %d\n", ret);
291 				return ret;
292 			}
293 		} else {
294 			ret = 1;
295 		}
296 
297 		ret = nvkm_event_init(fifo->func->nonstall, &fifo->engine.subdev, 1, ret,
298 				      &fifo->nonstall.event);
299 		if (ret)
300 			return ret;
301 	}
302 
303 	/* Allocate USERD + BAR1 polling area. */
304 	if (fifo->func->chan.func->userd->bar == 1) {
305 		struct nvkm_vmm *bar1 = nvkm_bar_bar1_vmm(device);
306 
307 		ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, fifo->chid->nr *
308 				      fifo->func->chan.func->userd->size, 0, true,
309 				      &fifo->userd.mem);
310 		if (ret)
311 			return ret;
312 
313 		ret = nvkm_vmm_get(bar1, 12, nvkm_memory_size(fifo->userd.mem), &fifo->userd.bar1);
314 		if (ret)
315 			return ret;
316 
317 		ret = nvkm_memory_map(fifo->userd.mem, 0, bar1, fifo->userd.bar1, NULL, 0);
318 		if (ret)
319 			return ret;
320 	}
321 
322 	return 0;
323 }
324 
325 static void
326 nvkm_fifo_preinit(struct nvkm_engine *engine)
327 {
328 	nvkm_mc_reset(engine->subdev.device, NVKM_ENGINE_FIFO, 0);
329 }
330 
331 static void *
332 nvkm_fifo_dtor(struct nvkm_engine *engine)
333 {
334 	struct nvkm_fifo *fifo = nvkm_fifo(engine);
335 	struct nvkm_runl *runl, *runt;
336 	struct nvkm_runq *runq, *rtmp;
337 
338 	if (fifo->userd.bar1)
339 		nvkm_vmm_put(nvkm_bar_bar1_vmm(engine->subdev.device), &fifo->userd.bar1);
340 	nvkm_memory_unref(&fifo->userd.mem);
341 
342 	list_for_each_entry_safe(runl, runt, &fifo->runls, head)
343 		nvkm_runl_del(runl);
344 	list_for_each_entry_safe(runq, rtmp, &fifo->runqs, head)
345 		nvkm_runq_del(runq);
346 
347 	nvkm_chid_unref(&fifo->cgid);
348 	nvkm_chid_unref(&fifo->chid);
349 
350 	nvkm_event_fini(&fifo->nonstall.event);
351 	mutex_destroy(&fifo->mutex);
352 	return fifo;
353 }
354 
355 static const struct nvkm_engine_func
356 nvkm_fifo = {
357 	.dtor = nvkm_fifo_dtor,
358 	.preinit = nvkm_fifo_preinit,
359 	.oneinit = nvkm_fifo_oneinit,
360 	.info = nvkm_fifo_info,
361 	.init = nvkm_fifo_init,
362 	.fini = nvkm_fifo_fini,
363 	.base.sclass = nvkm_fifo_class_get,
364 };
365 
366 int
367 nvkm_fifo_new_(const struct nvkm_fifo_func *func, struct nvkm_device *device,
368 	       enum nvkm_subdev_type type, int inst, struct nvkm_fifo **pfifo)
369 {
370 	struct nvkm_fifo *fifo;
371 
372 	if (!(fifo = *pfifo = kzalloc(sizeof(*fifo), GFP_KERNEL)))
373 		return -ENOMEM;
374 
375 	fifo->func = func;
376 	INIT_LIST_HEAD(&fifo->runqs);
377 	INIT_LIST_HEAD(&fifo->runls);
378 	/*TODO: Needs to be >CTXSW_TIMEOUT, so RC can recover before this is hit.
379 	 *      CTXSW_TIMEOUT HW default seems to differ between GPUs, so just a
380 	 *      large number for now until we support changing it.
381 	 */
382 	fifo->timeout.chan_msec = 10000;
383 	spin_lock_init(&fifo->lock);
384 	mutex_init(&fifo->mutex);
385 
386 	return nvkm_engine_ctor(&nvkm_fifo, device, type, inst, true, &fifo->engine);
387 }
388