1 // SPDX-License-Identifier: GPL-2.0 OR MIT
2 /**************************************************************************
3  *
4  * Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the
8  * "Software"), to deal in the Software without restriction, including
9  * without limitation the rights to use, copy, modify, merge, publish,
10  * distribute, sub license, and/or sell copies of the Software, and to
11  * permit persons to whom the Software is furnished to do so, subject to
12  * the following conditions:
13  *
14  * The above copyright notice and this permission notice (including the
15  * next paragraph) shall be included in all copies or substantial portions
16  * of the Software.
17  *
18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
25  *
26  **************************************************************************/
27 
28 #include <drm/ttm/ttm_placement.h>
29 
30 #include "vmwgfx_drv.h"
31 #include "vmwgfx_resource_priv.h"
32 #include "vmwgfx_binding.h"
33 
34 struct vmw_user_context {
35 	struct ttm_base_object base;
36 	struct vmw_resource res;
37 	struct vmw_ctx_binding_state *cbs;
38 	struct vmw_cmdbuf_res_manager *man;
39 	struct vmw_resource *cotables[SVGA_COTABLE_MAX];
40 	spinlock_t cotable_lock;
41 	struct vmw_buffer_object *dx_query_mob;
42 };
43 
44 static void vmw_user_context_free(struct vmw_resource *res);
45 static struct vmw_resource *
46 vmw_user_context_base_to_res(struct ttm_base_object *base);
47 
48 static int vmw_gb_context_create(struct vmw_resource *res);
49 static int vmw_gb_context_bind(struct vmw_resource *res,
50 			       struct ttm_validate_buffer *val_buf);
51 static int vmw_gb_context_unbind(struct vmw_resource *res,
52 				 bool readback,
53 				 struct ttm_validate_buffer *val_buf);
54 static int vmw_gb_context_destroy(struct vmw_resource *res);
55 static int vmw_dx_context_create(struct vmw_resource *res);
56 static int vmw_dx_context_bind(struct vmw_resource *res,
57 			       struct ttm_validate_buffer *val_buf);
58 static int vmw_dx_context_unbind(struct vmw_resource *res,
59 				 bool readback,
60 				 struct ttm_validate_buffer *val_buf);
61 static int vmw_dx_context_destroy(struct vmw_resource *res);
62 
63 static const struct vmw_user_resource_conv user_context_conv = {
64 	.object_type = VMW_RES_CONTEXT,
65 	.base_obj_to_res = vmw_user_context_base_to_res,
66 	.res_free = vmw_user_context_free
67 };
68 
69 const struct vmw_user_resource_conv *user_context_converter =
70 	&user_context_conv;
71 
72 
73 static const struct vmw_res_func vmw_legacy_context_func = {
74 	.res_type = vmw_res_context,
75 	.needs_backup = false,
76 	.may_evict = false,
77 	.type_name = "legacy contexts",
78 	.backup_placement = NULL,
79 	.create = NULL,
80 	.destroy = NULL,
81 	.bind = NULL,
82 	.unbind = NULL
83 };
84 
85 static const struct vmw_res_func vmw_gb_context_func = {
86 	.res_type = vmw_res_context,
87 	.needs_backup = true,
88 	.may_evict = true,
89 	.prio = 3,
90 	.dirty_prio = 3,
91 	.type_name = "guest backed contexts",
92 	.backup_placement = &vmw_mob_placement,
93 	.create = vmw_gb_context_create,
94 	.destroy = vmw_gb_context_destroy,
95 	.bind = vmw_gb_context_bind,
96 	.unbind = vmw_gb_context_unbind
97 };
98 
99 static const struct vmw_res_func vmw_dx_context_func = {
100 	.res_type = vmw_res_dx_context,
101 	.needs_backup = true,
102 	.may_evict = true,
103 	.prio = 3,
104 	.dirty_prio = 3,
105 	.type_name = "dx contexts",
106 	.backup_placement = &vmw_mob_placement,
107 	.create = vmw_dx_context_create,
108 	.destroy = vmw_dx_context_destroy,
109 	.bind = vmw_dx_context_bind,
110 	.unbind = vmw_dx_context_unbind
111 };
112 
113 /*
114  * Context management:
115  */
116 
117 static void vmw_context_cotables_unref(struct vmw_private *dev_priv,
118 				       struct vmw_user_context *uctx)
119 {
120 	struct vmw_resource *res;
121 	int i;
122 	u32 cotable_max = has_sm5_context(dev_priv) ?
123 		SVGA_COTABLE_MAX : SVGA_COTABLE_DX10_MAX;
124 
125 	for (i = 0; i < cotable_max; ++i) {
126 		spin_lock(&uctx->cotable_lock);
127 		res = uctx->cotables[i];
128 		uctx->cotables[i] = NULL;
129 		spin_unlock(&uctx->cotable_lock);
130 
131 		if (res)
132 			vmw_resource_unreference(&res);
133 	}
134 }
135 
136 static void vmw_hw_context_destroy(struct vmw_resource *res)
137 {
138 	struct vmw_user_context *uctx =
139 		container_of(res, struct vmw_user_context, res);
140 	struct vmw_private *dev_priv = res->dev_priv;
141 	struct {
142 		SVGA3dCmdHeader header;
143 		SVGA3dCmdDestroyContext body;
144 	} *cmd;
145 
146 
147 	if (res->func->destroy == vmw_gb_context_destroy ||
148 	    res->func->destroy == vmw_dx_context_destroy) {
149 		mutex_lock(&dev_priv->cmdbuf_mutex);
150 		vmw_cmdbuf_res_man_destroy(uctx->man);
151 		mutex_lock(&dev_priv->binding_mutex);
152 		vmw_binding_state_kill(uctx->cbs);
153 		(void) res->func->destroy(res);
154 		mutex_unlock(&dev_priv->binding_mutex);
155 		if (dev_priv->pinned_bo != NULL &&
156 		    !dev_priv->query_cid_valid)
157 			__vmw_execbuf_release_pinned_bo(dev_priv, NULL);
158 		mutex_unlock(&dev_priv->cmdbuf_mutex);
159 		vmw_context_cotables_unref(dev_priv, uctx);
160 		return;
161 	}
162 
163 	vmw_execbuf_release_pinned_bo(dev_priv);
164 	cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
165 	if (unlikely(cmd == NULL))
166 		return;
167 
168 	cmd->header.id = SVGA_3D_CMD_CONTEXT_DESTROY;
169 	cmd->header.size = sizeof(cmd->body);
170 	cmd->body.cid = res->id;
171 
172 	vmw_cmd_commit(dev_priv, sizeof(*cmd));
173 	vmw_fifo_resource_dec(dev_priv);
174 }
175 
176 static int vmw_gb_context_init(struct vmw_private *dev_priv,
177 			       bool dx,
178 			       struct vmw_resource *res,
179 			       void (*res_free)(struct vmw_resource *res))
180 {
181 	int ret, i;
182 	struct vmw_user_context *uctx =
183 		container_of(res, struct vmw_user_context, res);
184 
185 	res->backup_size = (dx ? sizeof(SVGADXContextMobFormat) :
186 				 sizeof(SVGAGBContextData));
187 	ret = vmw_resource_init(dev_priv, res, true,
188 				res_free,
189 				dx ? &vmw_dx_context_func :
190 				&vmw_gb_context_func);
191 	if (unlikely(ret != 0))
192 		goto out_err;
193 
194 	if (dev_priv->has_mob) {
195 		uctx->man = vmw_cmdbuf_res_man_create(dev_priv);
196 		if (IS_ERR(uctx->man)) {
197 			ret = PTR_ERR(uctx->man);
198 			uctx->man = NULL;
199 			goto out_err;
200 		}
201 	}
202 
203 	uctx->cbs = vmw_binding_state_alloc(dev_priv);
204 	if (IS_ERR(uctx->cbs)) {
205 		ret = PTR_ERR(uctx->cbs);
206 		goto out_err;
207 	}
208 
209 	spin_lock_init(&uctx->cotable_lock);
210 
211 	if (dx) {
212 		u32 cotable_max = has_sm5_context(dev_priv) ?
213 			SVGA_COTABLE_MAX : SVGA_COTABLE_DX10_MAX;
214 		for (i = 0; i < cotable_max; ++i) {
215 			uctx->cotables[i] = vmw_cotable_alloc(dev_priv,
216 							      &uctx->res, i);
217 			if (IS_ERR(uctx->cotables[i])) {
218 				ret = PTR_ERR(uctx->cotables[i]);
219 				goto out_cotables;
220 			}
221 		}
222 	}
223 
224 	res->hw_destroy = vmw_hw_context_destroy;
225 	return 0;
226 
227 out_cotables:
228 	vmw_context_cotables_unref(dev_priv, uctx);
229 out_err:
230 	if (res_free)
231 		res_free(res);
232 	else
233 		kfree(res);
234 	return ret;
235 }
236 
237 static int vmw_context_init(struct vmw_private *dev_priv,
238 			    struct vmw_resource *res,
239 			    void (*res_free)(struct vmw_resource *res),
240 			    bool dx)
241 {
242 	int ret;
243 
244 	struct {
245 		SVGA3dCmdHeader header;
246 		SVGA3dCmdDefineContext body;
247 	} *cmd;
248 
249 	if (dev_priv->has_mob)
250 		return vmw_gb_context_init(dev_priv, dx, res, res_free);
251 
252 	ret = vmw_resource_init(dev_priv, res, false,
253 				res_free, &vmw_legacy_context_func);
254 
255 	if (unlikely(ret != 0)) {
256 		DRM_ERROR("Failed to allocate a resource id.\n");
257 		goto out_early;
258 	}
259 
260 	if (unlikely(res->id >= SVGA3D_HB_MAX_CONTEXT_IDS)) {
261 		DRM_ERROR("Out of hw context ids.\n");
262 		vmw_resource_unreference(&res);
263 		return -ENOMEM;
264 	}
265 
266 	cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
267 	if (unlikely(cmd == NULL)) {
268 		vmw_resource_unreference(&res);
269 		return -ENOMEM;
270 	}
271 
272 	cmd->header.id = SVGA_3D_CMD_CONTEXT_DEFINE;
273 	cmd->header.size = sizeof(cmd->body);
274 	cmd->body.cid = res->id;
275 
276 	vmw_cmd_commit(dev_priv, sizeof(*cmd));
277 	vmw_fifo_resource_inc(dev_priv);
278 	res->hw_destroy = vmw_hw_context_destroy;
279 	return 0;
280 
281 out_early:
282 	if (res_free == NULL)
283 		kfree(res);
284 	else
285 		res_free(res);
286 	return ret;
287 }
288 
289 
290 /*
291  * GB context.
292  */
293 
294 static int vmw_gb_context_create(struct vmw_resource *res)
295 {
296 	struct vmw_private *dev_priv = res->dev_priv;
297 	int ret;
298 	struct {
299 		SVGA3dCmdHeader header;
300 		SVGA3dCmdDefineGBContext body;
301 	} *cmd;
302 
303 	if (likely(res->id != -1))
304 		return 0;
305 
306 	ret = vmw_resource_alloc_id(res);
307 	if (unlikely(ret != 0)) {
308 		DRM_ERROR("Failed to allocate a context id.\n");
309 		goto out_no_id;
310 	}
311 
312 	if (unlikely(res->id >= VMWGFX_NUM_GB_CONTEXT)) {
313 		ret = -EBUSY;
314 		goto out_no_fifo;
315 	}
316 
317 	cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
318 	if (unlikely(cmd == NULL)) {
319 		ret = -ENOMEM;
320 		goto out_no_fifo;
321 	}
322 
323 	cmd->header.id = SVGA_3D_CMD_DEFINE_GB_CONTEXT;
324 	cmd->header.size = sizeof(cmd->body);
325 	cmd->body.cid = res->id;
326 	vmw_cmd_commit(dev_priv, sizeof(*cmd));
327 	vmw_fifo_resource_inc(dev_priv);
328 
329 	return 0;
330 
331 out_no_fifo:
332 	vmw_resource_release_id(res);
333 out_no_id:
334 	return ret;
335 }
336 
337 static int vmw_gb_context_bind(struct vmw_resource *res,
338 			       struct ttm_validate_buffer *val_buf)
339 {
340 	struct vmw_private *dev_priv = res->dev_priv;
341 	struct {
342 		SVGA3dCmdHeader header;
343 		SVGA3dCmdBindGBContext body;
344 	} *cmd;
345 	struct ttm_buffer_object *bo = val_buf->bo;
346 
347 	BUG_ON(bo->resource->mem_type != VMW_PL_MOB);
348 
349 	cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
350 	if (unlikely(cmd == NULL))
351 		return -ENOMEM;
352 
353 	cmd->header.id = SVGA_3D_CMD_BIND_GB_CONTEXT;
354 	cmd->header.size = sizeof(cmd->body);
355 	cmd->body.cid = res->id;
356 	cmd->body.mobid = bo->resource->start;
357 	cmd->body.validContents = res->backup_dirty;
358 	res->backup_dirty = false;
359 	vmw_cmd_commit(dev_priv, sizeof(*cmd));
360 
361 	return 0;
362 }
363 
364 static int vmw_gb_context_unbind(struct vmw_resource *res,
365 				 bool readback,
366 				 struct ttm_validate_buffer *val_buf)
367 {
368 	struct vmw_private *dev_priv = res->dev_priv;
369 	struct ttm_buffer_object *bo = val_buf->bo;
370 	struct vmw_fence_obj *fence;
371 	struct vmw_user_context *uctx =
372 		container_of(res, struct vmw_user_context, res);
373 
374 	struct {
375 		SVGA3dCmdHeader header;
376 		SVGA3dCmdReadbackGBContext body;
377 	} *cmd1;
378 	struct {
379 		SVGA3dCmdHeader header;
380 		SVGA3dCmdBindGBContext body;
381 	} *cmd2;
382 	uint32_t submit_size;
383 	uint8_t *cmd;
384 
385 
386 	BUG_ON(bo->resource->mem_type != VMW_PL_MOB);
387 
388 	mutex_lock(&dev_priv->binding_mutex);
389 	vmw_binding_state_scrub(uctx->cbs);
390 
391 	submit_size = sizeof(*cmd2) + (readback ? sizeof(*cmd1) : 0);
392 
393 	cmd = VMW_CMD_RESERVE(dev_priv, submit_size);
394 	if (unlikely(cmd == NULL)) {
395 		mutex_unlock(&dev_priv->binding_mutex);
396 		return -ENOMEM;
397 	}
398 
399 	cmd2 = (void *) cmd;
400 	if (readback) {
401 		cmd1 = (void *) cmd;
402 		cmd1->header.id = SVGA_3D_CMD_READBACK_GB_CONTEXT;
403 		cmd1->header.size = sizeof(cmd1->body);
404 		cmd1->body.cid = res->id;
405 		cmd2 = (void *) (&cmd1[1]);
406 	}
407 	cmd2->header.id = SVGA_3D_CMD_BIND_GB_CONTEXT;
408 	cmd2->header.size = sizeof(cmd2->body);
409 	cmd2->body.cid = res->id;
410 	cmd2->body.mobid = SVGA3D_INVALID_ID;
411 
412 	vmw_cmd_commit(dev_priv, submit_size);
413 	mutex_unlock(&dev_priv->binding_mutex);
414 
415 	/*
416 	 * Create a fence object and fence the backup buffer.
417 	 */
418 
419 	(void) vmw_execbuf_fence_commands(NULL, dev_priv,
420 					  &fence, NULL);
421 
422 	vmw_bo_fence_single(bo, fence);
423 
424 	if (likely(fence != NULL))
425 		vmw_fence_obj_unreference(&fence);
426 
427 	return 0;
428 }
429 
430 static int vmw_gb_context_destroy(struct vmw_resource *res)
431 {
432 	struct vmw_private *dev_priv = res->dev_priv;
433 	struct {
434 		SVGA3dCmdHeader header;
435 		SVGA3dCmdDestroyGBContext body;
436 	} *cmd;
437 
438 	if (likely(res->id == -1))
439 		return 0;
440 
441 	cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
442 	if (unlikely(cmd == NULL))
443 		return -ENOMEM;
444 
445 	cmd->header.id = SVGA_3D_CMD_DESTROY_GB_CONTEXT;
446 	cmd->header.size = sizeof(cmd->body);
447 	cmd->body.cid = res->id;
448 	vmw_cmd_commit(dev_priv, sizeof(*cmd));
449 	if (dev_priv->query_cid == res->id)
450 		dev_priv->query_cid_valid = false;
451 	vmw_resource_release_id(res);
452 	vmw_fifo_resource_dec(dev_priv);
453 
454 	return 0;
455 }
456 
457 /*
458  * DX context.
459  */
460 
461 static int vmw_dx_context_create(struct vmw_resource *res)
462 {
463 	struct vmw_private *dev_priv = res->dev_priv;
464 	int ret;
465 	struct {
466 		SVGA3dCmdHeader header;
467 		SVGA3dCmdDXDefineContext body;
468 	} *cmd;
469 
470 	if (likely(res->id != -1))
471 		return 0;
472 
473 	ret = vmw_resource_alloc_id(res);
474 	if (unlikely(ret != 0)) {
475 		DRM_ERROR("Failed to allocate a context id.\n");
476 		goto out_no_id;
477 	}
478 
479 	if (unlikely(res->id >= VMWGFX_NUM_DXCONTEXT)) {
480 		ret = -EBUSY;
481 		goto out_no_fifo;
482 	}
483 
484 	cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
485 	if (unlikely(cmd == NULL)) {
486 		ret = -ENOMEM;
487 		goto out_no_fifo;
488 	}
489 
490 	cmd->header.id = SVGA_3D_CMD_DX_DEFINE_CONTEXT;
491 	cmd->header.size = sizeof(cmd->body);
492 	cmd->body.cid = res->id;
493 	vmw_cmd_commit(dev_priv, sizeof(*cmd));
494 	vmw_fifo_resource_inc(dev_priv);
495 
496 	return 0;
497 
498 out_no_fifo:
499 	vmw_resource_release_id(res);
500 out_no_id:
501 	return ret;
502 }
503 
504 static int vmw_dx_context_bind(struct vmw_resource *res,
505 			       struct ttm_validate_buffer *val_buf)
506 {
507 	struct vmw_private *dev_priv = res->dev_priv;
508 	struct {
509 		SVGA3dCmdHeader header;
510 		SVGA3dCmdDXBindContext body;
511 	} *cmd;
512 	struct ttm_buffer_object *bo = val_buf->bo;
513 
514 	BUG_ON(bo->resource->mem_type != VMW_PL_MOB);
515 
516 	cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
517 	if (unlikely(cmd == NULL))
518 		return -ENOMEM;
519 
520 	cmd->header.id = SVGA_3D_CMD_DX_BIND_CONTEXT;
521 	cmd->header.size = sizeof(cmd->body);
522 	cmd->body.cid = res->id;
523 	cmd->body.mobid = bo->resource->start;
524 	cmd->body.validContents = res->backup_dirty;
525 	res->backup_dirty = false;
526 	vmw_cmd_commit(dev_priv, sizeof(*cmd));
527 
528 
529 	return 0;
530 }
531 
532 /**
533  * vmw_dx_context_scrub_cotables - Scrub all bindings and
534  * cotables from a context
535  *
536  * @ctx: Pointer to the context resource
537  * @readback: Whether to save the otable contents on scrubbing.
538  *
539  * COtables must be unbound before their context, but unbinding requires
540  * the backup buffer being reserved, whereas scrubbing does not.
541  * This function scrubs all cotables of a context, potentially reading back
542  * the contents into their backup buffers. However, scrubbing cotables
543  * also makes the device context invalid, so scrub all bindings first so
544  * that doesn't have to be done later with an invalid context.
545  */
546 void vmw_dx_context_scrub_cotables(struct vmw_resource *ctx,
547 				   bool readback)
548 {
549 	struct vmw_user_context *uctx =
550 		container_of(ctx, struct vmw_user_context, res);
551 	u32 cotable_max = has_sm5_context(ctx->dev_priv) ?
552 		SVGA_COTABLE_MAX : SVGA_COTABLE_DX10_MAX;
553 	int i;
554 
555 	vmw_binding_state_scrub(uctx->cbs);
556 	for (i = 0; i < cotable_max; ++i) {
557 		struct vmw_resource *res;
558 
559 		/* Avoid racing with ongoing cotable destruction. */
560 		spin_lock(&uctx->cotable_lock);
561 		res = uctx->cotables[vmw_cotable_scrub_order[i]];
562 		if (res)
563 			res = vmw_resource_reference_unless_doomed(res);
564 		spin_unlock(&uctx->cotable_lock);
565 		if (!res)
566 			continue;
567 
568 		WARN_ON(vmw_cotable_scrub(res, readback));
569 		vmw_resource_unreference(&res);
570 	}
571 }
572 
573 static int vmw_dx_context_unbind(struct vmw_resource *res,
574 				 bool readback,
575 				 struct ttm_validate_buffer *val_buf)
576 {
577 	struct vmw_private *dev_priv = res->dev_priv;
578 	struct ttm_buffer_object *bo = val_buf->bo;
579 	struct vmw_fence_obj *fence;
580 	struct vmw_user_context *uctx =
581 		container_of(res, struct vmw_user_context, res);
582 
583 	struct {
584 		SVGA3dCmdHeader header;
585 		SVGA3dCmdDXReadbackContext body;
586 	} *cmd1;
587 	struct {
588 		SVGA3dCmdHeader header;
589 		SVGA3dCmdDXBindContext body;
590 	} *cmd2;
591 	uint32_t submit_size;
592 	uint8_t *cmd;
593 
594 
595 	BUG_ON(bo->resource->mem_type != VMW_PL_MOB);
596 
597 	mutex_lock(&dev_priv->binding_mutex);
598 	vmw_dx_context_scrub_cotables(res, readback);
599 
600 	if (uctx->dx_query_mob && uctx->dx_query_mob->dx_query_ctx &&
601 	    readback) {
602 		WARN_ON(uctx->dx_query_mob->dx_query_ctx != res);
603 		if (vmw_query_readback_all(uctx->dx_query_mob))
604 			DRM_ERROR("Failed to read back query states\n");
605 	}
606 
607 	submit_size = sizeof(*cmd2) + (readback ? sizeof(*cmd1) : 0);
608 
609 	cmd = VMW_CMD_RESERVE(dev_priv, submit_size);
610 	if (unlikely(cmd == NULL)) {
611 		mutex_unlock(&dev_priv->binding_mutex);
612 		return -ENOMEM;
613 	}
614 
615 	cmd2 = (void *) cmd;
616 	if (readback) {
617 		cmd1 = (void *) cmd;
618 		cmd1->header.id = SVGA_3D_CMD_DX_READBACK_CONTEXT;
619 		cmd1->header.size = sizeof(cmd1->body);
620 		cmd1->body.cid = res->id;
621 		cmd2 = (void *) (&cmd1[1]);
622 	}
623 	cmd2->header.id = SVGA_3D_CMD_DX_BIND_CONTEXT;
624 	cmd2->header.size = sizeof(cmd2->body);
625 	cmd2->body.cid = res->id;
626 	cmd2->body.mobid = SVGA3D_INVALID_ID;
627 
628 	vmw_cmd_commit(dev_priv, submit_size);
629 	mutex_unlock(&dev_priv->binding_mutex);
630 
631 	/*
632 	 * Create a fence object and fence the backup buffer.
633 	 */
634 
635 	(void) vmw_execbuf_fence_commands(NULL, dev_priv,
636 					  &fence, NULL);
637 
638 	vmw_bo_fence_single(bo, fence);
639 
640 	if (likely(fence != NULL))
641 		vmw_fence_obj_unreference(&fence);
642 
643 	return 0;
644 }
645 
646 static int vmw_dx_context_destroy(struct vmw_resource *res)
647 {
648 	struct vmw_private *dev_priv = res->dev_priv;
649 	struct {
650 		SVGA3dCmdHeader header;
651 		SVGA3dCmdDXDestroyContext body;
652 	} *cmd;
653 
654 	if (likely(res->id == -1))
655 		return 0;
656 
657 	cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
658 	if (unlikely(cmd == NULL))
659 		return -ENOMEM;
660 
661 	cmd->header.id = SVGA_3D_CMD_DX_DESTROY_CONTEXT;
662 	cmd->header.size = sizeof(cmd->body);
663 	cmd->body.cid = res->id;
664 	vmw_cmd_commit(dev_priv, sizeof(*cmd));
665 	if (dev_priv->query_cid == res->id)
666 		dev_priv->query_cid_valid = false;
667 	vmw_resource_release_id(res);
668 	vmw_fifo_resource_dec(dev_priv);
669 
670 	return 0;
671 }
672 
673 /*
674  * User-space context management:
675  */
676 
677 static struct vmw_resource *
678 vmw_user_context_base_to_res(struct ttm_base_object *base)
679 {
680 	return &(container_of(base, struct vmw_user_context, base)->res);
681 }
682 
683 static void vmw_user_context_free(struct vmw_resource *res)
684 {
685 	struct vmw_user_context *ctx =
686 	    container_of(res, struct vmw_user_context, res);
687 
688 	if (ctx->cbs)
689 		vmw_binding_state_free(ctx->cbs);
690 
691 	(void) vmw_context_bind_dx_query(res, NULL);
692 
693 	ttm_base_object_kfree(ctx, base);
694 }
695 
696 /*
697  * This function is called when user space has no more references on the
698  * base object. It releases the base-object's reference on the resource object.
699  */
700 
701 static void vmw_user_context_base_release(struct ttm_base_object **p_base)
702 {
703 	struct ttm_base_object *base = *p_base;
704 	struct vmw_user_context *ctx =
705 	    container_of(base, struct vmw_user_context, base);
706 	struct vmw_resource *res = &ctx->res;
707 
708 	*p_base = NULL;
709 	vmw_resource_unreference(&res);
710 }
711 
712 int vmw_context_destroy_ioctl(struct drm_device *dev, void *data,
713 			      struct drm_file *file_priv)
714 {
715 	struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
716 	struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
717 
718 	return ttm_ref_object_base_unref(tfile, arg->cid);
719 }
720 
721 static int vmw_context_define(struct drm_device *dev, void *data,
722 			      struct drm_file *file_priv, bool dx)
723 {
724 	struct vmw_private *dev_priv = vmw_priv(dev);
725 	struct vmw_user_context *ctx;
726 	struct vmw_resource *res;
727 	struct vmw_resource *tmp;
728 	struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
729 	struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
730 	int ret;
731 
732 	if (!has_sm4_context(dev_priv) && dx) {
733 		VMW_DEBUG_USER("DX contexts not supported by device.\n");
734 		return -EINVAL;
735 	}
736 
737 	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
738 	if (unlikely(!ctx)) {
739 		ret = -ENOMEM;
740 		goto out_ret;
741 	}
742 
743 	res = &ctx->res;
744 	ctx->base.shareable = false;
745 	ctx->base.tfile = NULL;
746 
747 	/*
748 	 * From here on, the destructor takes over resource freeing.
749 	 */
750 
751 	ret = vmw_context_init(dev_priv, res, vmw_user_context_free, dx);
752 	if (unlikely(ret != 0))
753 		goto out_ret;
754 
755 	tmp = vmw_resource_reference(&ctx->res);
756 	ret = ttm_base_object_init(tfile, &ctx->base, false, VMW_RES_CONTEXT,
757 				   &vmw_user_context_base_release);
758 
759 	if (unlikely(ret != 0)) {
760 		vmw_resource_unreference(&tmp);
761 		goto out_err;
762 	}
763 
764 	arg->cid = ctx->base.handle;
765 out_err:
766 	vmw_resource_unreference(&res);
767 out_ret:
768 	return ret;
769 }
770 
771 int vmw_context_define_ioctl(struct drm_device *dev, void *data,
772 			     struct drm_file *file_priv)
773 {
774 	return vmw_context_define(dev, data, file_priv, false);
775 }
776 
777 int vmw_extended_context_define_ioctl(struct drm_device *dev, void *data,
778 				      struct drm_file *file_priv)
779 {
780 	union drm_vmw_extended_context_arg *arg = (typeof(arg)) data;
781 	struct drm_vmw_context_arg *rep = &arg->rep;
782 
783 	switch (arg->req) {
784 	case drm_vmw_context_legacy:
785 		return vmw_context_define(dev, rep, file_priv, false);
786 	case drm_vmw_context_dx:
787 		return vmw_context_define(dev, rep, file_priv, true);
788 	default:
789 		break;
790 	}
791 	return -EINVAL;
792 }
793 
794 /**
795  * vmw_context_binding_list - Return a list of context bindings
796  *
797  * @ctx: The context resource
798  *
799  * Returns the current list of bindings of the given context. Note that
800  * this list becomes stale as soon as the dev_priv::binding_mutex is unlocked.
801  */
802 struct list_head *vmw_context_binding_list(struct vmw_resource *ctx)
803 {
804 	struct vmw_user_context *uctx =
805 		container_of(ctx, struct vmw_user_context, res);
806 
807 	return vmw_binding_state_list(uctx->cbs);
808 }
809 
810 struct vmw_cmdbuf_res_manager *vmw_context_res_man(struct vmw_resource *ctx)
811 {
812 	return container_of(ctx, struct vmw_user_context, res)->man;
813 }
814 
815 struct vmw_resource *vmw_context_cotable(struct vmw_resource *ctx,
816 					 SVGACOTableType cotable_type)
817 {
818 	u32 cotable_max = has_sm5_context(ctx->dev_priv) ?
819 		SVGA_COTABLE_MAX : SVGA_COTABLE_DX10_MAX;
820 
821 	if (cotable_type >= cotable_max)
822 		return ERR_PTR(-EINVAL);
823 
824 	return container_of(ctx, struct vmw_user_context, res)->
825 		cotables[cotable_type];
826 }
827 
828 /**
829  * vmw_context_binding_state -
830  * Return a pointer to a context binding state structure
831  *
832  * @ctx: The context resource
833  *
834  * Returns the current state of bindings of the given context. Note that
835  * this state becomes stale as soon as the dev_priv::binding_mutex is unlocked.
836  */
837 struct vmw_ctx_binding_state *
838 vmw_context_binding_state(struct vmw_resource *ctx)
839 {
840 	return container_of(ctx, struct vmw_user_context, res)->cbs;
841 }
842 
843 /**
844  * vmw_context_bind_dx_query -
845  * Sets query MOB for the context.  If @mob is NULL, then this function will
846  * remove the association between the MOB and the context.  This function
847  * assumes the binding_mutex is held.
848  *
849  * @ctx_res: The context resource
850  * @mob: a reference to the query MOB
851  *
852  * Returns -EINVAL if a MOB has already been set and does not match the one
853  * specified in the parameter.  0 otherwise.
854  */
855 int vmw_context_bind_dx_query(struct vmw_resource *ctx_res,
856 			      struct vmw_buffer_object *mob)
857 {
858 	struct vmw_user_context *uctx =
859 		container_of(ctx_res, struct vmw_user_context, res);
860 
861 	if (mob == NULL) {
862 		if (uctx->dx_query_mob) {
863 			uctx->dx_query_mob->dx_query_ctx = NULL;
864 			vmw_bo_unreference(&uctx->dx_query_mob);
865 			uctx->dx_query_mob = NULL;
866 		}
867 
868 		return 0;
869 	}
870 
871 	/* Can only have one MOB per context for queries */
872 	if (uctx->dx_query_mob && uctx->dx_query_mob != mob)
873 		return -EINVAL;
874 
875 	mob->dx_query_ctx  = ctx_res;
876 
877 	if (!uctx->dx_query_mob)
878 		uctx->dx_query_mob = vmw_bo_reference(mob);
879 
880 	return 0;
881 }
882 
883 /**
884  * vmw_context_get_dx_query_mob - Returns non-counted reference to DX query mob
885  *
886  * @ctx_res: The context resource
887  */
888 struct vmw_buffer_object *
889 vmw_context_get_dx_query_mob(struct vmw_resource *ctx_res)
890 {
891 	struct vmw_user_context *uctx =
892 		container_of(ctx_res, struct vmw_user_context, res);
893 
894 	return uctx->dx_query_mob;
895 }
896