1 /*
2  * Copyright (C) 2007 Ben Skeggs.
3  * All Rights Reserved.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining
6  * a copy of this software and associated documentation files (the
7  * "Software"), to deal in the Software without restriction, including
8  * without limitation the rights to use, copy, modify, merge, publish,
9  * distribute, sublicense, and/or sell copies of the Software, and to
10  * permit persons to whom the Software is furnished to do so, subject to
11  * the following conditions:
12  *
13  * The above copyright notice and this permission notice (including the
14  * next paragraph) shall be included in all copies or substantial
15  * portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24  *
25  */
26 
27 #include "drmP.h"
28 #include "drm.h"
29 #include "nouveau_drv.h"
30 #include "nouveau_grctx.h"
31 
32 static int nv40_graph_register(struct drm_device *);
33 static void nv40_graph_isr(struct drm_device *);
34 
35 struct nouveau_channel *
nv40_graph_channel(struct drm_device * dev)36 nv40_graph_channel(struct drm_device *dev)
37 {
38 	struct drm_nouveau_private *dev_priv = dev->dev_private;
39 	uint32_t inst;
40 	int i;
41 
42 	inst = nv_rd32(dev, NV40_PGRAPH_CTXCTL_CUR);
43 	if (!(inst & NV40_PGRAPH_CTXCTL_CUR_LOADED))
44 		return NULL;
45 	inst = (inst & NV40_PGRAPH_CTXCTL_CUR_INSTANCE) << 4;
46 
47 	for (i = 0; i < dev_priv->engine.fifo.channels; i++) {
48 		struct nouveau_channel *chan = dev_priv->channels.ptr[i];
49 
50 		if (chan && chan->ramin_grctx &&
51 		    chan->ramin_grctx->pinst == inst)
52 			return chan;
53 	}
54 
55 	return NULL;
56 }
57 
58 int
nv40_graph_create_context(struct nouveau_channel * chan)59 nv40_graph_create_context(struct nouveau_channel *chan)
60 {
61 	struct drm_device *dev = chan->dev;
62 	struct drm_nouveau_private *dev_priv = dev->dev_private;
63 	struct nouveau_pgraph_engine *pgraph = &dev_priv->engine.graph;
64 	struct nouveau_grctx ctx = {};
65 	unsigned long flags;
66 	int ret;
67 
68 	ret = nouveau_gpuobj_new(dev, chan, pgraph->grctx_size, 16,
69 				 NVOBJ_FLAG_ZERO_ALLOC, &chan->ramin_grctx);
70 	if (ret)
71 		return ret;
72 
73 	/* Initialise default context values */
74 	ctx.dev = chan->dev;
75 	ctx.mode = NOUVEAU_GRCTX_VALS;
76 	ctx.data = chan->ramin_grctx;
77 	nv40_grctx_init(&ctx);
78 
79 	nv_wo32(chan->ramin_grctx, 0, chan->ramin_grctx->pinst);
80 
81 	/* init grctx pointer in ramfc, and on PFIFO if channel is
82 	 * already active there
83 	 */
84 	spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
85 	nv_wo32(chan->ramfc, 0x38, chan->ramin_grctx->pinst >> 4);
86 	nv_mask(dev, 0x002500, 0x00000001, 0x00000000);
87 	if ((nv_rd32(dev, 0x003204) & 0x0000001f) == chan->id)
88 		nv_wr32(dev, 0x0032e0, chan->ramin_grctx->pinst >> 4);
89 	nv_mask(dev, 0x002500, 0x00000001, 0x00000001);
90 	spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
91 	return 0;
92 }
93 
94 void
nv40_graph_destroy_context(struct nouveau_channel * chan)95 nv40_graph_destroy_context(struct nouveau_channel *chan)
96 {
97 	struct drm_device *dev = chan->dev;
98 	struct drm_nouveau_private *dev_priv = dev->dev_private;
99 	struct nouveau_pgraph_engine *pgraph = &dev_priv->engine.graph;
100 	unsigned long flags;
101 
102 	spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
103 	pgraph->fifo_access(dev, false);
104 
105 	/* Unload the context if it's the currently active one */
106 	if (pgraph->channel(dev) == chan)
107 		pgraph->unload_context(dev);
108 
109 	pgraph->fifo_access(dev, true);
110 	spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
111 
112 	/* Free the context resources */
113 	nouveau_gpuobj_ref(NULL, &chan->ramin_grctx);
114 }
115 
116 static int
nv40_graph_transfer_context(struct drm_device * dev,uint32_t inst,int save)117 nv40_graph_transfer_context(struct drm_device *dev, uint32_t inst, int save)
118 {
119 	uint32_t old_cp, tv = 1000, tmp;
120 	int i;
121 
122 	old_cp = nv_rd32(dev, NV20_PGRAPH_CHANNEL_CTX_POINTER);
123 	nv_wr32(dev, NV20_PGRAPH_CHANNEL_CTX_POINTER, inst);
124 
125 	tmp  = nv_rd32(dev, NV40_PGRAPH_CTXCTL_0310);
126 	tmp |= save ? NV40_PGRAPH_CTXCTL_0310_XFER_SAVE :
127 		      NV40_PGRAPH_CTXCTL_0310_XFER_LOAD;
128 	nv_wr32(dev, NV40_PGRAPH_CTXCTL_0310, tmp);
129 
130 	tmp  = nv_rd32(dev, NV40_PGRAPH_CTXCTL_0304);
131 	tmp |= NV40_PGRAPH_CTXCTL_0304_XFER_CTX;
132 	nv_wr32(dev, NV40_PGRAPH_CTXCTL_0304, tmp);
133 
134 	nouveau_wait_for_idle(dev);
135 
136 	for (i = 0; i < tv; i++) {
137 		if (nv_rd32(dev, NV40_PGRAPH_CTXCTL_030C) == 0)
138 			break;
139 	}
140 
141 	nv_wr32(dev, NV20_PGRAPH_CHANNEL_CTX_POINTER, old_cp);
142 
143 	if (i == tv) {
144 		uint32_t ucstat = nv_rd32(dev, NV40_PGRAPH_CTXCTL_UCODE_STAT);
145 		NV_ERROR(dev, "Failed: Instance=0x%08x Save=%d\n", inst, save);
146 		NV_ERROR(dev, "IP: 0x%02x, Opcode: 0x%08x\n",
147 			 ucstat >> NV40_PGRAPH_CTXCTL_UCODE_STAT_IP_SHIFT,
148 			 ucstat  & NV40_PGRAPH_CTXCTL_UCODE_STAT_OP_MASK);
149 		NV_ERROR(dev, "0x40030C = 0x%08x\n",
150 			 nv_rd32(dev, NV40_PGRAPH_CTXCTL_030C));
151 		return -EBUSY;
152 	}
153 
154 	return 0;
155 }
156 
157 /* Restore the context for a specific channel into PGRAPH */
158 int
nv40_graph_load_context(struct nouveau_channel * chan)159 nv40_graph_load_context(struct nouveau_channel *chan)
160 {
161 	struct drm_device *dev = chan->dev;
162 	uint32_t inst;
163 	int ret;
164 
165 	if (!chan->ramin_grctx)
166 		return -EINVAL;
167 	inst = chan->ramin_grctx->pinst >> 4;
168 
169 	ret = nv40_graph_transfer_context(dev, inst, 0);
170 	if (ret)
171 		return ret;
172 
173 	/* 0x40032C, no idea of it's exact function.  Could simply be a
174 	 * record of the currently active PGRAPH context.  It's currently
175 	 * unknown as to what bit 24 does.  The nv ddx has it set, so we will
176 	 * set it here too.
177 	 */
178 	nv_wr32(dev, NV20_PGRAPH_CHANNEL_CTX_POINTER, inst);
179 	nv_wr32(dev, NV40_PGRAPH_CTXCTL_CUR,
180 		 (inst & NV40_PGRAPH_CTXCTL_CUR_INSTANCE) |
181 		  NV40_PGRAPH_CTXCTL_CUR_LOADED);
182 	/* 0x32E0 records the instance address of the active FIFO's PGRAPH
183 	 * context.  If at any time this doesn't match 0x40032C, you will
184 	 * receive PGRAPH_INTR_CONTEXT_SWITCH
185 	 */
186 	nv_wr32(dev, NV40_PFIFO_GRCTX_INSTANCE, inst);
187 	return 0;
188 }
189 
190 int
nv40_graph_unload_context(struct drm_device * dev)191 nv40_graph_unload_context(struct drm_device *dev)
192 {
193 	uint32_t inst;
194 	int ret;
195 
196 	inst = nv_rd32(dev, NV40_PGRAPH_CTXCTL_CUR);
197 	if (!(inst & NV40_PGRAPH_CTXCTL_CUR_LOADED))
198 		return 0;
199 	inst &= NV40_PGRAPH_CTXCTL_CUR_INSTANCE;
200 
201 	ret = nv40_graph_transfer_context(dev, inst, 1);
202 
203 	nv_wr32(dev, NV40_PGRAPH_CTXCTL_CUR, inst);
204 	return ret;
205 }
206 
207 void
nv40_graph_set_tile_region(struct drm_device * dev,int i)208 nv40_graph_set_tile_region(struct drm_device *dev, int i)
209 {
210 	struct drm_nouveau_private *dev_priv = dev->dev_private;
211 	struct nouveau_tile_reg *tile = &dev_priv->tile.reg[i];
212 
213 	switch (dev_priv->chipset) {
214 	case 0x40:
215 	case 0x41: /* guess */
216 	case 0x42:
217 	case 0x43:
218 	case 0x45: /* guess */
219 	case 0x4e:
220 		nv_wr32(dev, NV20_PGRAPH_TSIZE(i), tile->pitch);
221 		nv_wr32(dev, NV20_PGRAPH_TLIMIT(i), tile->limit);
222 		nv_wr32(dev, NV20_PGRAPH_TILE(i), tile->addr);
223 		nv_wr32(dev, NV40_PGRAPH_TSIZE1(i), tile->pitch);
224 		nv_wr32(dev, NV40_PGRAPH_TLIMIT1(i), tile->limit);
225 		nv_wr32(dev, NV40_PGRAPH_TILE1(i), tile->addr);
226 		break;
227 	case 0x44:
228 	case 0x4a:
229 		nv_wr32(dev, NV20_PGRAPH_TSIZE(i), tile->pitch);
230 		nv_wr32(dev, NV20_PGRAPH_TLIMIT(i), tile->limit);
231 		nv_wr32(dev, NV20_PGRAPH_TILE(i), tile->addr);
232 		break;
233 	case 0x46:
234 	case 0x47:
235 	case 0x49:
236 	case 0x4b:
237 	case 0x4c:
238 	case 0x67:
239 	default:
240 		nv_wr32(dev, NV47_PGRAPH_TSIZE(i), tile->pitch);
241 		nv_wr32(dev, NV47_PGRAPH_TLIMIT(i), tile->limit);
242 		nv_wr32(dev, NV47_PGRAPH_TILE(i), tile->addr);
243 		nv_wr32(dev, NV40_PGRAPH_TSIZE1(i), tile->pitch);
244 		nv_wr32(dev, NV40_PGRAPH_TLIMIT1(i), tile->limit);
245 		nv_wr32(dev, NV40_PGRAPH_TILE1(i), tile->addr);
246 		break;
247 	}
248 }
249 
250 /*
251  * G70		0x47
252  * G71		0x49
253  * NV45		0x48
254  * G72[M]	0x46
255  * G73		0x4b
256  * C51_G7X	0x4c
257  * C51		0x4e
258  */
259 int
nv40_graph_init(struct drm_device * dev)260 nv40_graph_init(struct drm_device *dev)
261 {
262 	struct drm_nouveau_private *dev_priv =
263 		(struct drm_nouveau_private *)dev->dev_private;
264 	struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
265 	struct nouveau_grctx ctx = {};
266 	uint32_t vramsz, *cp;
267 	int ret, i, j;
268 
269 	nv_wr32(dev, NV03_PMC_ENABLE, nv_rd32(dev, NV03_PMC_ENABLE) &
270 			~NV_PMC_ENABLE_PGRAPH);
271 	nv_wr32(dev, NV03_PMC_ENABLE, nv_rd32(dev, NV03_PMC_ENABLE) |
272 			 NV_PMC_ENABLE_PGRAPH);
273 
274 	cp = kmalloc(sizeof(*cp) * 256, GFP_KERNEL);
275 	if (!cp)
276 		return -ENOMEM;
277 
278 	ctx.dev = dev;
279 	ctx.mode = NOUVEAU_GRCTX_PROG;
280 	ctx.data = cp;
281 	ctx.ctxprog_max = 256;
282 	nv40_grctx_init(&ctx);
283 	dev_priv->engine.graph.grctx_size = ctx.ctxvals_pos * 4;
284 
285 	nv_wr32(dev, NV40_PGRAPH_CTXCTL_UCODE_INDEX, 0);
286 	for (i = 0; i < ctx.ctxprog_len; i++)
287 		nv_wr32(dev, NV40_PGRAPH_CTXCTL_UCODE_DATA, cp[i]);
288 
289 	kfree(cp);
290 
291 	ret = nv40_graph_register(dev);
292 	if (ret)
293 		return ret;
294 
295 	/* No context present currently */
296 	nv_wr32(dev, NV40_PGRAPH_CTXCTL_CUR, 0x00000000);
297 
298 	nouveau_irq_register(dev, 12, nv40_graph_isr);
299 	nv_wr32(dev, NV03_PGRAPH_INTR   , 0xFFFFFFFF);
300 	nv_wr32(dev, NV40_PGRAPH_INTR_EN, 0xFFFFFFFF);
301 
302 	nv_wr32(dev, NV04_PGRAPH_DEBUG_0, 0xFFFFFFFF);
303 	nv_wr32(dev, NV04_PGRAPH_DEBUG_0, 0x00000000);
304 	nv_wr32(dev, NV04_PGRAPH_DEBUG_1, 0x401287c0);
305 	nv_wr32(dev, NV04_PGRAPH_DEBUG_3, 0xe0de8055);
306 	nv_wr32(dev, NV10_PGRAPH_DEBUG_4, 0x00008000);
307 	nv_wr32(dev, NV04_PGRAPH_LIMIT_VIOL_PIX, 0x00be3c5f);
308 
309 	nv_wr32(dev, NV10_PGRAPH_CTX_CONTROL, 0x10010100);
310 	nv_wr32(dev, NV10_PGRAPH_STATE      , 0xFFFFFFFF);
311 
312 	j = nv_rd32(dev, 0x1540) & 0xff;
313 	if (j) {
314 		for (i = 0; !(j & 1); j >>= 1, i++)
315 			;
316 		nv_wr32(dev, 0x405000, i);
317 	}
318 
319 	if (dev_priv->chipset == 0x40) {
320 		nv_wr32(dev, 0x4009b0, 0x83280fff);
321 		nv_wr32(dev, 0x4009b4, 0x000000a0);
322 	} else {
323 		nv_wr32(dev, 0x400820, 0x83280eff);
324 		nv_wr32(dev, 0x400824, 0x000000a0);
325 	}
326 
327 	switch (dev_priv->chipset) {
328 	case 0x40:
329 	case 0x45:
330 		nv_wr32(dev, 0x4009b8, 0x0078e366);
331 		nv_wr32(dev, 0x4009bc, 0x0000014c);
332 		break;
333 	case 0x41:
334 	case 0x42: /* pciid also 0x00Cx */
335 	/* case 0x0120: XXX (pciid) */
336 		nv_wr32(dev, 0x400828, 0x007596ff);
337 		nv_wr32(dev, 0x40082c, 0x00000108);
338 		break;
339 	case 0x43:
340 		nv_wr32(dev, 0x400828, 0x0072cb77);
341 		nv_wr32(dev, 0x40082c, 0x00000108);
342 		break;
343 	case 0x44:
344 	case 0x46: /* G72 */
345 	case 0x4a:
346 	case 0x4c: /* G7x-based C51 */
347 	case 0x4e:
348 		nv_wr32(dev, 0x400860, 0);
349 		nv_wr32(dev, 0x400864, 0);
350 		break;
351 	case 0x47: /* G70 */
352 	case 0x49: /* G71 */
353 	case 0x4b: /* G73 */
354 		nv_wr32(dev, 0x400828, 0x07830610);
355 		nv_wr32(dev, 0x40082c, 0x0000016A);
356 		break;
357 	default:
358 		break;
359 	}
360 
361 	nv_wr32(dev, 0x400b38, 0x2ffff800);
362 	nv_wr32(dev, 0x400b3c, 0x00006000);
363 
364 	/* Tiling related stuff. */
365 	switch (dev_priv->chipset) {
366 	case 0x44:
367 	case 0x4a:
368 		nv_wr32(dev, 0x400bc4, 0x1003d888);
369 		nv_wr32(dev, 0x400bbc, 0xb7a7b500);
370 		break;
371 	case 0x46:
372 		nv_wr32(dev, 0x400bc4, 0x0000e024);
373 		nv_wr32(dev, 0x400bbc, 0xb7a7b520);
374 		break;
375 	case 0x4c:
376 	case 0x4e:
377 	case 0x67:
378 		nv_wr32(dev, 0x400bc4, 0x1003d888);
379 		nv_wr32(dev, 0x400bbc, 0xb7a7b540);
380 		break;
381 	default:
382 		break;
383 	}
384 
385 	/* Turn all the tiling regions off. */
386 	for (i = 0; i < pfb->num_tiles; i++)
387 		nv40_graph_set_tile_region(dev, i);
388 
389 	/* begin RAM config */
390 	vramsz = pci_resource_len(dev->pdev, 0) - 1;
391 	switch (dev_priv->chipset) {
392 	case 0x40:
393 		nv_wr32(dev, 0x4009A4, nv_rd32(dev, NV04_PFB_CFG0));
394 		nv_wr32(dev, 0x4009A8, nv_rd32(dev, NV04_PFB_CFG1));
395 		nv_wr32(dev, 0x4069A4, nv_rd32(dev, NV04_PFB_CFG0));
396 		nv_wr32(dev, 0x4069A8, nv_rd32(dev, NV04_PFB_CFG1));
397 		nv_wr32(dev, 0x400820, 0);
398 		nv_wr32(dev, 0x400824, 0);
399 		nv_wr32(dev, 0x400864, vramsz);
400 		nv_wr32(dev, 0x400868, vramsz);
401 		break;
402 	default:
403 		switch (dev_priv->chipset) {
404 		case 0x41:
405 		case 0x42:
406 		case 0x43:
407 		case 0x45:
408 		case 0x4e:
409 		case 0x44:
410 		case 0x4a:
411 			nv_wr32(dev, 0x4009F0, nv_rd32(dev, NV04_PFB_CFG0));
412 			nv_wr32(dev, 0x4009F4, nv_rd32(dev, NV04_PFB_CFG1));
413 			break;
414 		default:
415 			nv_wr32(dev, 0x400DF0, nv_rd32(dev, NV04_PFB_CFG0));
416 			nv_wr32(dev, 0x400DF4, nv_rd32(dev, NV04_PFB_CFG1));
417 			break;
418 		}
419 		nv_wr32(dev, 0x4069F0, nv_rd32(dev, NV04_PFB_CFG0));
420 		nv_wr32(dev, 0x4069F4, nv_rd32(dev, NV04_PFB_CFG1));
421 		nv_wr32(dev, 0x400840, 0);
422 		nv_wr32(dev, 0x400844, 0);
423 		nv_wr32(dev, 0x4008A0, vramsz);
424 		nv_wr32(dev, 0x4008A4, vramsz);
425 		break;
426 	}
427 
428 	return 0;
429 }
430 
nv40_graph_takedown(struct drm_device * dev)431 void nv40_graph_takedown(struct drm_device *dev)
432 {
433 	nouveau_irq_unregister(dev, 12);
434 }
435 
436 static int
nv40_graph_register(struct drm_device * dev)437 nv40_graph_register(struct drm_device *dev)
438 {
439 	struct drm_nouveau_private *dev_priv = dev->dev_private;
440 
441 	if (dev_priv->engine.graph.registered)
442 		return 0;
443 
444 	NVOBJ_CLASS(dev, 0x506e, SW); /* nvsw */
445 	NVOBJ_CLASS(dev, 0x0030, GR); /* null */
446 	NVOBJ_CLASS(dev, 0x0039, GR); /* m2mf */
447 	NVOBJ_CLASS(dev, 0x004a, GR); /* gdirect */
448 	NVOBJ_CLASS(dev, 0x009f, GR); /* imageblit (nv12) */
449 	NVOBJ_CLASS(dev, 0x008a, GR); /* ifc */
450 	NVOBJ_CLASS(dev, 0x0089, GR); /* sifm */
451 	NVOBJ_CLASS(dev, 0x3089, GR); /* sifm (nv40) */
452 	NVOBJ_CLASS(dev, 0x0062, GR); /* surf2d */
453 	NVOBJ_CLASS(dev, 0x3062, GR); /* surf2d (nv40) */
454 	NVOBJ_CLASS(dev, 0x0043, GR); /* rop */
455 	NVOBJ_CLASS(dev, 0x0012, GR); /* beta1 */
456 	NVOBJ_CLASS(dev, 0x0072, GR); /* beta4 */
457 	NVOBJ_CLASS(dev, 0x0019, GR); /* cliprect */
458 	NVOBJ_CLASS(dev, 0x0044, GR); /* pattern */
459 	NVOBJ_CLASS(dev, 0x309e, GR); /* swzsurf */
460 
461 	/* curie */
462 	if (nv44_graph_class(dev))
463 		NVOBJ_CLASS(dev, 0x4497, GR);
464 	else
465 		NVOBJ_CLASS(dev, 0x4097, GR);
466 
467 	/* nvsw */
468 	NVOBJ_CLASS(dev, 0x506e, SW);
469 	NVOBJ_MTHD (dev, 0x506e, 0x0500, nv04_graph_mthd_page_flip);
470 
471 	dev_priv->engine.graph.registered = true;
472 	return 0;
473 }
474 
475 static int
nv40_graph_isr_chid(struct drm_device * dev,u32 inst)476 nv40_graph_isr_chid(struct drm_device *dev, u32 inst)
477 {
478 	struct drm_nouveau_private *dev_priv = dev->dev_private;
479 	struct nouveau_channel *chan;
480 	unsigned long flags;
481 	int i;
482 
483 	spin_lock_irqsave(&dev_priv->channels.lock, flags);
484 	for (i = 0; i < dev_priv->engine.fifo.channels; i++) {
485 		chan = dev_priv->channels.ptr[i];
486 		if (!chan || !chan->ramin_grctx)
487 			continue;
488 
489 		if (inst == chan->ramin_grctx->pinst)
490 			break;
491 	}
492 	spin_unlock_irqrestore(&dev_priv->channels.lock, flags);
493 	return i;
494 }
495 
496 static void
nv40_graph_isr(struct drm_device * dev)497 nv40_graph_isr(struct drm_device *dev)
498 {
499 	u32 stat;
500 
501 	while ((stat = nv_rd32(dev, NV03_PGRAPH_INTR))) {
502 		u32 nsource = nv_rd32(dev, NV03_PGRAPH_NSOURCE);
503 		u32 nstatus = nv_rd32(dev, NV03_PGRAPH_NSTATUS);
504 		u32 inst = (nv_rd32(dev, 0x40032c) & 0x000fffff) << 4;
505 		u32 chid = nv40_graph_isr_chid(dev, inst);
506 		u32 addr = nv_rd32(dev, NV04_PGRAPH_TRAPPED_ADDR);
507 		u32 subc = (addr & 0x00070000) >> 16;
508 		u32 mthd = (addr & 0x00001ffc);
509 		u32 data = nv_rd32(dev, NV04_PGRAPH_TRAPPED_DATA);
510 		u32 class = nv_rd32(dev, 0x400160 + subc * 4) & 0xffff;
511 		u32 show = stat;
512 
513 		if (stat & NV_PGRAPH_INTR_ERROR) {
514 			if (nsource & NV03_PGRAPH_NSOURCE_ILLEGAL_MTHD) {
515 				if (!nouveau_gpuobj_mthd_call2(dev, chid, class, mthd, data))
516 					show &= ~NV_PGRAPH_INTR_ERROR;
517 			} else
518 			if (nsource & NV03_PGRAPH_NSOURCE_DMA_VTX_PROTECTION) {
519 				nv_mask(dev, 0x402000, 0, 0);
520 			}
521 		}
522 
523 		nv_wr32(dev, NV03_PGRAPH_INTR, stat);
524 		nv_wr32(dev, NV04_PGRAPH_FIFO, 0x00000001);
525 
526 		if (show && nouveau_ratelimit()) {
527 			NV_INFO(dev, "PGRAPH -");
528 			nouveau_bitfield_print(nv10_graph_intr, show);
529 			printk(" nsource:");
530 			nouveau_bitfield_print(nv04_graph_nsource, nsource);
531 			printk(" nstatus:");
532 			nouveau_bitfield_print(nv10_graph_nstatus, nstatus);
533 			printk("\n");
534 			NV_INFO(dev, "PGRAPH - ch %d (0x%08x) subc %d "
535 				     "class 0x%04x mthd 0x%04x data 0x%08x\n",
536 				chid, inst, subc, class, mthd, data);
537 		}
538 	}
539 }
540