1 // SPDX-License-Identifier: GPL-2.0 OR MIT
2 /**************************************************************************
3 *
4 * Copyright © 2011-2018 VMware, Inc., Palo Alto, CA., USA
5 * All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
22 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
23 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
24 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
25 * USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 **************************************************************************/
28
29 #include <drm/ttm/ttm_placement.h>
30
31 #include "vmwgfx_drv.h"
32 #include "ttm_object.h"
33
34
35 /**
36 * vmw_buffer_object - Convert a struct ttm_buffer_object to a struct
37 * vmw_buffer_object.
38 *
39 * @bo: Pointer to the TTM buffer object.
40 * Return: Pointer to the struct vmw_buffer_object embedding the
41 * TTM buffer object.
42 */
43 static struct vmw_buffer_object *
vmw_buffer_object(struct ttm_buffer_object * bo)44 vmw_buffer_object(struct ttm_buffer_object *bo)
45 {
46 return container_of(bo, struct vmw_buffer_object, base);
47 }
48
49 /**
50 * bo_is_vmw - check if the buffer object is a &vmw_buffer_object
51 * @bo: ttm buffer object to be checked
52 *
53 * Uses destroy function associated with the object to determine if this is
54 * a &vmw_buffer_object.
55 *
56 * Returns:
57 * true if the object is of &vmw_buffer_object type, false if not.
58 */
bo_is_vmw(struct ttm_buffer_object * bo)59 static bool bo_is_vmw(struct ttm_buffer_object *bo)
60 {
61 return bo->destroy == &vmw_bo_bo_free ||
62 bo->destroy == &vmw_gem_destroy;
63 }
64
65 /**
66 * vmw_bo_pin_in_placement - Validate a buffer to placement.
67 *
68 * @dev_priv: Driver private.
69 * @buf: DMA buffer to move.
70 * @placement: The placement to pin it.
71 * @interruptible: Use interruptible wait.
72 * Return: Zero on success, Negative error code on failure. In particular
73 * -ERESTARTSYS if interrupted by a signal
74 */
vmw_bo_pin_in_placement(struct vmw_private * dev_priv,struct vmw_buffer_object * buf,struct ttm_placement * placement,bool interruptible)75 int vmw_bo_pin_in_placement(struct vmw_private *dev_priv,
76 struct vmw_buffer_object *buf,
77 struct ttm_placement *placement,
78 bool interruptible)
79 {
80 struct ttm_operation_ctx ctx = {interruptible, false };
81 struct ttm_buffer_object *bo = &buf->base;
82 int ret;
83
84 vmw_execbuf_release_pinned_bo(dev_priv);
85
86 ret = ttm_bo_reserve(bo, interruptible, false, NULL);
87 if (unlikely(ret != 0))
88 goto err;
89
90 if (buf->base.pin_count > 0)
91 ret = ttm_resource_compat(bo->resource, placement)
92 ? 0 : -EINVAL;
93 else
94 ret = ttm_bo_validate(bo, placement, &ctx);
95
96 if (!ret)
97 vmw_bo_pin_reserved(buf, true);
98
99 ttm_bo_unreserve(bo);
100 err:
101 return ret;
102 }
103
104
105 /**
106 * vmw_bo_pin_in_vram_or_gmr - Move a buffer to vram or gmr.
107 *
108 * This function takes the reservation_sem in write mode.
109 * Flushes and unpins the query bo to avoid failures.
110 *
111 * @dev_priv: Driver private.
112 * @buf: DMA buffer to move.
113 * @interruptible: Use interruptible wait.
114 * Return: Zero on success, Negative error code on failure. In particular
115 * -ERESTARTSYS if interrupted by a signal
116 */
vmw_bo_pin_in_vram_or_gmr(struct vmw_private * dev_priv,struct vmw_buffer_object * buf,bool interruptible)117 int vmw_bo_pin_in_vram_or_gmr(struct vmw_private *dev_priv,
118 struct vmw_buffer_object *buf,
119 bool interruptible)
120 {
121 struct ttm_operation_ctx ctx = {interruptible, false };
122 struct ttm_buffer_object *bo = &buf->base;
123 int ret;
124
125 vmw_execbuf_release_pinned_bo(dev_priv);
126
127 ret = ttm_bo_reserve(bo, interruptible, false, NULL);
128 if (unlikely(ret != 0))
129 goto err;
130
131 if (buf->base.pin_count > 0) {
132 ret = ttm_resource_compat(bo->resource, &vmw_vram_gmr_placement)
133 ? 0 : -EINVAL;
134 goto out_unreserve;
135 }
136
137 ret = ttm_bo_validate(bo, &vmw_vram_gmr_placement, &ctx);
138 if (likely(ret == 0) || ret == -ERESTARTSYS)
139 goto out_unreserve;
140
141 ret = ttm_bo_validate(bo, &vmw_vram_placement, &ctx);
142
143 out_unreserve:
144 if (!ret)
145 vmw_bo_pin_reserved(buf, true);
146
147 ttm_bo_unreserve(bo);
148 err:
149 return ret;
150 }
151
152
153 /**
154 * vmw_bo_pin_in_vram - Move a buffer to vram.
155 *
156 * This function takes the reservation_sem in write mode.
157 * Flushes and unpins the query bo to avoid failures.
158 *
159 * @dev_priv: Driver private.
160 * @buf: DMA buffer to move.
161 * @interruptible: Use interruptible wait.
162 * Return: Zero on success, Negative error code on failure. In particular
163 * -ERESTARTSYS if interrupted by a signal
164 */
vmw_bo_pin_in_vram(struct vmw_private * dev_priv,struct vmw_buffer_object * buf,bool interruptible)165 int vmw_bo_pin_in_vram(struct vmw_private *dev_priv,
166 struct vmw_buffer_object *buf,
167 bool interruptible)
168 {
169 return vmw_bo_pin_in_placement(dev_priv, buf, &vmw_vram_placement,
170 interruptible);
171 }
172
173
174 /**
175 * vmw_bo_pin_in_start_of_vram - Move a buffer to start of vram.
176 *
177 * This function takes the reservation_sem in write mode.
178 * Flushes and unpins the query bo to avoid failures.
179 *
180 * @dev_priv: Driver private.
181 * @buf: DMA buffer to pin.
182 * @interruptible: Use interruptible wait.
183 * Return: Zero on success, Negative error code on failure. In particular
184 * -ERESTARTSYS if interrupted by a signal
185 */
vmw_bo_pin_in_start_of_vram(struct vmw_private * dev_priv,struct vmw_buffer_object * buf,bool interruptible)186 int vmw_bo_pin_in_start_of_vram(struct vmw_private *dev_priv,
187 struct vmw_buffer_object *buf,
188 bool interruptible)
189 {
190 struct ttm_operation_ctx ctx = {interruptible, false };
191 struct ttm_buffer_object *bo = &buf->base;
192 struct ttm_placement placement;
193 struct ttm_place place;
194 int ret = 0;
195
196 place = vmw_vram_placement.placement[0];
197 place.lpfn = bo->resource->num_pages;
198 placement.num_placement = 1;
199 placement.placement = &place;
200 placement.num_busy_placement = 1;
201 placement.busy_placement = &place;
202
203 vmw_execbuf_release_pinned_bo(dev_priv);
204 ret = ttm_bo_reserve(bo, interruptible, false, NULL);
205 if (unlikely(ret != 0))
206 goto err_unlock;
207
208 /*
209 * Is this buffer already in vram but not at the start of it?
210 * In that case, evict it first because TTM isn't good at handling
211 * that situation.
212 */
213 if (bo->resource->mem_type == TTM_PL_VRAM &&
214 bo->resource->start < bo->resource->num_pages &&
215 bo->resource->start > 0 &&
216 buf->base.pin_count == 0) {
217 ctx.interruptible = false;
218 (void) ttm_bo_validate(bo, &vmw_sys_placement, &ctx);
219 }
220
221 if (buf->base.pin_count > 0)
222 ret = ttm_resource_compat(bo->resource, &placement)
223 ? 0 : -EINVAL;
224 else
225 ret = ttm_bo_validate(bo, &placement, &ctx);
226
227 /* For some reason we didn't end up at the start of vram */
228 WARN_ON(ret == 0 && bo->resource->start != 0);
229 if (!ret)
230 vmw_bo_pin_reserved(buf, true);
231
232 ttm_bo_unreserve(bo);
233 err_unlock:
234
235 return ret;
236 }
237
238
239 /**
240 * vmw_bo_unpin - Unpin the buffer given buffer, does not move the buffer.
241 *
242 * This function takes the reservation_sem in write mode.
243 *
244 * @dev_priv: Driver private.
245 * @buf: DMA buffer to unpin.
246 * @interruptible: Use interruptible wait.
247 * Return: Zero on success, Negative error code on failure. In particular
248 * -ERESTARTSYS if interrupted by a signal
249 */
vmw_bo_unpin(struct vmw_private * dev_priv,struct vmw_buffer_object * buf,bool interruptible)250 int vmw_bo_unpin(struct vmw_private *dev_priv,
251 struct vmw_buffer_object *buf,
252 bool interruptible)
253 {
254 struct ttm_buffer_object *bo = &buf->base;
255 int ret;
256
257 ret = ttm_bo_reserve(bo, interruptible, false, NULL);
258 if (unlikely(ret != 0))
259 goto err;
260
261 vmw_bo_pin_reserved(buf, false);
262
263 ttm_bo_unreserve(bo);
264
265 err:
266 return ret;
267 }
268
269 /**
270 * vmw_bo_get_guest_ptr - Get the guest ptr representing the current placement
271 * of a buffer.
272 *
273 * @bo: Pointer to a struct ttm_buffer_object. Must be pinned or reserved.
274 * @ptr: SVGAGuestPtr returning the result.
275 */
vmw_bo_get_guest_ptr(const struct ttm_buffer_object * bo,SVGAGuestPtr * ptr)276 void vmw_bo_get_guest_ptr(const struct ttm_buffer_object *bo,
277 SVGAGuestPtr *ptr)
278 {
279 if (bo->resource->mem_type == TTM_PL_VRAM) {
280 ptr->gmrId = SVGA_GMR_FRAMEBUFFER;
281 ptr->offset = bo->resource->start << PAGE_SHIFT;
282 } else {
283 ptr->gmrId = bo->resource->start;
284 ptr->offset = 0;
285 }
286 }
287
288
289 /**
290 * vmw_bo_pin_reserved - Pin or unpin a buffer object without moving it.
291 *
292 * @vbo: The buffer object. Must be reserved.
293 * @pin: Whether to pin or unpin.
294 *
295 */
vmw_bo_pin_reserved(struct vmw_buffer_object * vbo,bool pin)296 void vmw_bo_pin_reserved(struct vmw_buffer_object *vbo, bool pin)
297 {
298 struct ttm_operation_ctx ctx = { false, true };
299 struct ttm_place pl;
300 struct ttm_placement placement;
301 struct ttm_buffer_object *bo = &vbo->base;
302 uint32_t old_mem_type = bo->resource->mem_type;
303 int ret;
304
305 dma_resv_assert_held(bo->base.resv);
306
307 if (pin == !!bo->pin_count)
308 return;
309
310 pl.fpfn = 0;
311 pl.lpfn = 0;
312 pl.mem_type = bo->resource->mem_type;
313 pl.flags = bo->resource->placement;
314
315 memset(&placement, 0, sizeof(placement));
316 placement.num_placement = 1;
317 placement.placement = &pl;
318
319 ret = ttm_bo_validate(bo, &placement, &ctx);
320
321 BUG_ON(ret != 0 || bo->resource->mem_type != old_mem_type);
322
323 if (pin)
324 ttm_bo_pin(bo);
325 else
326 ttm_bo_unpin(bo);
327 }
328
329 /**
330 * vmw_bo_map_and_cache - Map a buffer object and cache the map
331 *
332 * @vbo: The buffer object to map
333 * Return: A kernel virtual address or NULL if mapping failed.
334 *
335 * This function maps a buffer object into the kernel address space, or
336 * returns the virtual kernel address of an already existing map. The virtual
337 * address remains valid as long as the buffer object is pinned or reserved.
338 * The cached map is torn down on either
339 * 1) Buffer object move
340 * 2) Buffer object swapout
341 * 3) Buffer object destruction
342 *
343 */
vmw_bo_map_and_cache(struct vmw_buffer_object * vbo)344 void *vmw_bo_map_and_cache(struct vmw_buffer_object *vbo)
345 {
346 struct ttm_buffer_object *bo = &vbo->base;
347 bool not_used;
348 void *virtual;
349 int ret;
350
351 virtual = ttm_kmap_obj_virtual(&vbo->map, ¬_used);
352 if (virtual)
353 return virtual;
354
355 ret = ttm_bo_kmap(bo, 0, bo->resource->num_pages, &vbo->map);
356 if (ret)
357 DRM_ERROR("Buffer object map failed: %d.\n", ret);
358
359 return ttm_kmap_obj_virtual(&vbo->map, ¬_used);
360 }
361
362
363 /**
364 * vmw_bo_unmap - Tear down a cached buffer object map.
365 *
366 * @vbo: The buffer object whose map we are tearing down.
367 *
368 * This function tears down a cached map set up using
369 * vmw_buffer_object_map_and_cache().
370 */
vmw_bo_unmap(struct vmw_buffer_object * vbo)371 void vmw_bo_unmap(struct vmw_buffer_object *vbo)
372 {
373 if (vbo->map.bo == NULL)
374 return;
375
376 ttm_bo_kunmap(&vbo->map);
377 }
378
379
380 /**
381 * vmw_bo_bo_free - vmw buffer object destructor
382 *
383 * @bo: Pointer to the embedded struct ttm_buffer_object
384 */
vmw_bo_bo_free(struct ttm_buffer_object * bo)385 void vmw_bo_bo_free(struct ttm_buffer_object *bo)
386 {
387 struct vmw_buffer_object *vmw_bo = vmw_buffer_object(bo);
388
389 WARN_ON(vmw_bo->dirty);
390 WARN_ON(!RB_EMPTY_ROOT(&vmw_bo->res_tree));
391 vmw_bo_unmap(vmw_bo);
392 drm_gem_object_release(&bo->base);
393 kfree(vmw_bo);
394 }
395
396 /* default destructor */
vmw_bo_default_destroy(struct ttm_buffer_object * bo)397 static void vmw_bo_default_destroy(struct ttm_buffer_object *bo)
398 {
399 kfree(bo);
400 }
401
402 /**
403 * vmw_bo_create_kernel - Create a pinned BO for internal kernel use.
404 *
405 * @dev_priv: Pointer to the device private struct
406 * @size: size of the BO we need
407 * @placement: where to put it
408 * @p_bo: resulting BO
409 *
410 * Creates and pin a simple BO for in kernel use.
411 */
vmw_bo_create_kernel(struct vmw_private * dev_priv,unsigned long size,struct ttm_placement * placement,struct ttm_buffer_object ** p_bo)412 int vmw_bo_create_kernel(struct vmw_private *dev_priv, unsigned long size,
413 struct ttm_placement *placement,
414 struct ttm_buffer_object **p_bo)
415 {
416 struct ttm_operation_ctx ctx = {
417 .interruptible = false,
418 .no_wait_gpu = false
419 };
420 struct ttm_buffer_object *bo;
421 struct drm_device *vdev = &dev_priv->drm;
422 int ret;
423
424 bo = kzalloc(sizeof(*bo), GFP_KERNEL);
425 if (unlikely(!bo))
426 return -ENOMEM;
427
428 size = ALIGN(size, PAGE_SIZE);
429
430 drm_gem_private_object_init(vdev, &bo->base, size);
431
432 ret = ttm_bo_init_reserved(&dev_priv->bdev, bo, ttm_bo_type_kernel,
433 placement, 0, &ctx, NULL, NULL,
434 vmw_bo_default_destroy);
435 if (unlikely(ret))
436 goto error_free;
437
438 ttm_bo_pin(bo);
439 ttm_bo_unreserve(bo);
440 *p_bo = bo;
441
442 return 0;
443
444 error_free:
445 kfree(bo);
446 return ret;
447 }
448
vmw_bo_create(struct vmw_private * vmw,size_t size,struct ttm_placement * placement,bool interruptible,bool pin,void (* bo_free)(struct ttm_buffer_object * bo),struct vmw_buffer_object ** p_bo)449 int vmw_bo_create(struct vmw_private *vmw,
450 size_t size, struct ttm_placement *placement,
451 bool interruptible, bool pin,
452 void (*bo_free)(struct ttm_buffer_object *bo),
453 struct vmw_buffer_object **p_bo)
454 {
455 int ret;
456
457 BUG_ON(!bo_free);
458
459 *p_bo = kmalloc(sizeof(**p_bo), GFP_KERNEL);
460 if (unlikely(!*p_bo)) {
461 DRM_ERROR("Failed to allocate a buffer.\n");
462 return -ENOMEM;
463 }
464
465 ret = vmw_bo_init(vmw, *p_bo, size,
466 placement, interruptible, pin,
467 bo_free);
468 if (unlikely(ret != 0))
469 goto out_error;
470
471 return ret;
472 out_error:
473 kfree(*p_bo);
474 *p_bo = NULL;
475 return ret;
476 }
477
478 /**
479 * vmw_bo_init - Initialize a vmw buffer object
480 *
481 * @dev_priv: Pointer to the device private struct
482 * @vmw_bo: Pointer to the struct vmw_buffer_object to initialize.
483 * @size: Buffer object size in bytes.
484 * @placement: Initial placement.
485 * @interruptible: Whether waits should be performed interruptible.
486 * @pin: If the BO should be created pinned at a fixed location.
487 * @bo_free: The buffer object destructor.
488 * Returns: Zero on success, negative error code on error.
489 *
490 * Note that on error, the code will free the buffer object.
491 */
vmw_bo_init(struct vmw_private * dev_priv,struct vmw_buffer_object * vmw_bo,size_t size,struct ttm_placement * placement,bool interruptible,bool pin,void (* bo_free)(struct ttm_buffer_object * bo))492 int vmw_bo_init(struct vmw_private *dev_priv,
493 struct vmw_buffer_object *vmw_bo,
494 size_t size, struct ttm_placement *placement,
495 bool interruptible, bool pin,
496 void (*bo_free)(struct ttm_buffer_object *bo))
497 {
498 struct ttm_operation_ctx ctx = {
499 .interruptible = interruptible,
500 .no_wait_gpu = false
501 };
502 struct ttm_device *bdev = &dev_priv->bdev;
503 struct drm_device *vdev = &dev_priv->drm;
504 int ret;
505
506 WARN_ON_ONCE(!bo_free);
507 memset(vmw_bo, 0, sizeof(*vmw_bo));
508 BUILD_BUG_ON(TTM_MAX_BO_PRIORITY <= 3);
509 vmw_bo->base.priority = 3;
510 vmw_bo->res_tree = RB_ROOT;
511
512 size = ALIGN(size, PAGE_SIZE);
513 drm_gem_private_object_init(vdev, &vmw_bo->base.base, size);
514
515 ret = ttm_bo_init_reserved(bdev, &vmw_bo->base, ttm_bo_type_device,
516 placement, 0, &ctx, NULL, NULL, bo_free);
517 if (unlikely(ret)) {
518 return ret;
519 }
520
521 if (pin)
522 ttm_bo_pin(&vmw_bo->base);
523 ttm_bo_unreserve(&vmw_bo->base);
524
525 return 0;
526 }
527
528 /**
529 * vmw_user_bo_synccpu_grab - Grab a struct vmw_buffer_object for cpu
530 * access, idling previous GPU operations on the buffer and optionally
531 * blocking it for further command submissions.
532 *
533 * @vmw_bo: Pointer to the buffer object being grabbed for CPU access
534 * @flags: Flags indicating how the grab should be performed.
535 * Return: Zero on success, Negative error code on error. In particular,
536 * -EBUSY will be returned if a dontblock operation is requested and the
537 * buffer object is busy, and -ERESTARTSYS will be returned if a wait is
538 * interrupted by a signal.
539 *
540 * A blocking grab will be automatically released when @tfile is closed.
541 */
vmw_user_bo_synccpu_grab(struct vmw_buffer_object * vmw_bo,uint32_t flags)542 static int vmw_user_bo_synccpu_grab(struct vmw_buffer_object *vmw_bo,
543 uint32_t flags)
544 {
545 bool nonblock = !!(flags & drm_vmw_synccpu_dontblock);
546 struct ttm_buffer_object *bo = &vmw_bo->base;
547 int ret;
548
549 if (flags & drm_vmw_synccpu_allow_cs) {
550 long lret;
551
552 lret = dma_resv_wait_timeout(bo->base.resv, DMA_RESV_USAGE_READ,
553 true, nonblock ? 0 :
554 MAX_SCHEDULE_TIMEOUT);
555 if (!lret)
556 return -EBUSY;
557 else if (lret < 0)
558 return lret;
559 return 0;
560 }
561
562 ret = ttm_bo_reserve(bo, true, nonblock, NULL);
563 if (unlikely(ret != 0))
564 return ret;
565
566 ret = ttm_bo_wait(bo, true, nonblock);
567 if (likely(ret == 0))
568 atomic_inc(&vmw_bo->cpu_writers);
569
570 ttm_bo_unreserve(bo);
571 if (unlikely(ret != 0))
572 return ret;
573
574 return ret;
575 }
576
577 /**
578 * vmw_user_bo_synccpu_release - Release a previous grab for CPU access,
579 * and unblock command submission on the buffer if blocked.
580 *
581 * @filp: Identifying the caller.
582 * @handle: Handle identifying the buffer object.
583 * @flags: Flags indicating the type of release.
584 */
vmw_user_bo_synccpu_release(struct drm_file * filp,uint32_t handle,uint32_t flags)585 static int vmw_user_bo_synccpu_release(struct drm_file *filp,
586 uint32_t handle,
587 uint32_t flags)
588 {
589 struct vmw_buffer_object *vmw_bo;
590 int ret = vmw_user_bo_lookup(filp, handle, &vmw_bo);
591
592 if (!ret) {
593 if (!(flags & drm_vmw_synccpu_allow_cs)) {
594 atomic_dec(&vmw_bo->cpu_writers);
595 }
596 ttm_bo_put(&vmw_bo->base);
597 }
598
599 return ret;
600 }
601
602
603 /**
604 * vmw_user_bo_synccpu_ioctl - ioctl function implementing the synccpu
605 * functionality.
606 *
607 * @dev: Identifies the drm device.
608 * @data: Pointer to the ioctl argument.
609 * @file_priv: Identifies the caller.
610 * Return: Zero on success, negative error code on error.
611 *
612 * This function checks the ioctl arguments for validity and calls the
613 * relevant synccpu functions.
614 */
vmw_user_bo_synccpu_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)615 int vmw_user_bo_synccpu_ioctl(struct drm_device *dev, void *data,
616 struct drm_file *file_priv)
617 {
618 struct drm_vmw_synccpu_arg *arg =
619 (struct drm_vmw_synccpu_arg *) data;
620 struct vmw_buffer_object *vbo;
621 int ret;
622
623 if ((arg->flags & (drm_vmw_synccpu_read | drm_vmw_synccpu_write)) == 0
624 || (arg->flags & ~(drm_vmw_synccpu_read | drm_vmw_synccpu_write |
625 drm_vmw_synccpu_dontblock |
626 drm_vmw_synccpu_allow_cs)) != 0) {
627 DRM_ERROR("Illegal synccpu flags.\n");
628 return -EINVAL;
629 }
630
631 switch (arg->op) {
632 case drm_vmw_synccpu_grab:
633 ret = vmw_user_bo_lookup(file_priv, arg->handle, &vbo);
634 if (unlikely(ret != 0))
635 return ret;
636
637 ret = vmw_user_bo_synccpu_grab(vbo, arg->flags);
638 vmw_bo_unreference(&vbo);
639 if (unlikely(ret != 0)) {
640 if (ret == -ERESTARTSYS || ret == -EBUSY)
641 return -EBUSY;
642 DRM_ERROR("Failed synccpu grab on handle 0x%08x.\n",
643 (unsigned int) arg->handle);
644 return ret;
645 }
646 break;
647 case drm_vmw_synccpu_release:
648 ret = vmw_user_bo_synccpu_release(file_priv,
649 arg->handle,
650 arg->flags);
651 if (unlikely(ret != 0)) {
652 DRM_ERROR("Failed synccpu release on handle 0x%08x.\n",
653 (unsigned int) arg->handle);
654 return ret;
655 }
656 break;
657 default:
658 DRM_ERROR("Invalid synccpu operation.\n");
659 return -EINVAL;
660 }
661
662 return 0;
663 }
664
665 /**
666 * vmw_bo_unref_ioctl - Generic handle close ioctl.
667 *
668 * @dev: Identifies the drm device.
669 * @data: Pointer to the ioctl argument.
670 * @file_priv: Identifies the caller.
671 * Return: Zero on success, negative error code on error.
672 *
673 * This function checks the ioctl arguments for validity and closes a
674 * handle to a TTM base object, optionally freeing the object.
675 */
vmw_bo_unref_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)676 int vmw_bo_unref_ioctl(struct drm_device *dev, void *data,
677 struct drm_file *file_priv)
678 {
679 struct drm_vmw_unref_dmabuf_arg *arg =
680 (struct drm_vmw_unref_dmabuf_arg *)data;
681
682 drm_gem_handle_delete(file_priv, arg->handle);
683 return 0;
684 }
685
686
687 /**
688 * vmw_user_bo_lookup - Look up a vmw user buffer object from a handle.
689 *
690 * @filp: The file the handle is registered with.
691 * @handle: The user buffer object handle
692 * @out: Pointer to a where a pointer to the embedded
693 * struct vmw_buffer_object should be placed.
694 * Return: Zero on success, Negative error code on error.
695 *
696 * The vmw buffer object pointer will be refcounted.
697 */
vmw_user_bo_lookup(struct drm_file * filp,uint32_t handle,struct vmw_buffer_object ** out)698 int vmw_user_bo_lookup(struct drm_file *filp,
699 uint32_t handle,
700 struct vmw_buffer_object **out)
701 {
702 struct drm_gem_object *gobj;
703
704 gobj = drm_gem_object_lookup(filp, handle);
705 if (!gobj) {
706 DRM_ERROR("Invalid buffer object handle 0x%08lx.\n",
707 (unsigned long)handle);
708 return -ESRCH;
709 }
710
711 *out = gem_to_vmw_bo(gobj);
712 ttm_bo_get(&(*out)->base);
713 drm_gem_object_put(gobj);
714
715 return 0;
716 }
717
718 /**
719 * vmw_user_bo_noref_lookup - Look up a vmw user buffer object without reference
720 * @filp: The TTM object file the handle is registered with.
721 * @handle: The user buffer object handle.
722 *
723 * This function looks up a struct vmw_bo and returns a pointer to the
724 * struct vmw_buffer_object it derives from without refcounting the pointer.
725 * The returned pointer is only valid until vmw_user_bo_noref_release() is
726 * called, and the object pointed to by the returned pointer may be doomed.
727 * Any persistent usage of the object requires a refcount to be taken using
728 * ttm_bo_reference_unless_doomed(). Iff this function returns successfully it
729 * needs to be paired with vmw_user_bo_noref_release() and no sleeping-
730 * or scheduling functions may be called in between these function calls.
731 *
732 * Return: A struct vmw_buffer_object pointer if successful or negative
733 * error pointer on failure.
734 */
735 struct vmw_buffer_object *
vmw_user_bo_noref_lookup(struct drm_file * filp,u32 handle)736 vmw_user_bo_noref_lookup(struct drm_file *filp, u32 handle)
737 {
738 struct vmw_buffer_object *vmw_bo;
739 struct ttm_buffer_object *bo;
740 struct drm_gem_object *gobj = drm_gem_object_lookup(filp, handle);
741
742 if (!gobj) {
743 DRM_ERROR("Invalid buffer object handle 0x%08lx.\n",
744 (unsigned long)handle);
745 return ERR_PTR(-ESRCH);
746 }
747 vmw_bo = gem_to_vmw_bo(gobj);
748 bo = ttm_bo_get_unless_zero(&vmw_bo->base);
749 vmw_bo = vmw_buffer_object(bo);
750 drm_gem_object_put(gobj);
751
752 return vmw_bo;
753 }
754
755
756 /**
757 * vmw_bo_fence_single - Utility function to fence a single TTM buffer
758 * object without unreserving it.
759 *
760 * @bo: Pointer to the struct ttm_buffer_object to fence.
761 * @fence: Pointer to the fence. If NULL, this function will
762 * insert a fence into the command stream..
763 *
764 * Contrary to the ttm_eu version of this function, it takes only
765 * a single buffer object instead of a list, and it also doesn't
766 * unreserve the buffer object, which needs to be done separately.
767 */
vmw_bo_fence_single(struct ttm_buffer_object * bo,struct vmw_fence_obj * fence)768 void vmw_bo_fence_single(struct ttm_buffer_object *bo,
769 struct vmw_fence_obj *fence)
770 {
771 struct ttm_device *bdev = bo->bdev;
772 struct vmw_private *dev_priv =
773 container_of(bdev, struct vmw_private, bdev);
774 int ret;
775
776 if (fence == NULL)
777 vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
778 else
779 dma_fence_get(&fence->base);
780
781 ret = dma_resv_reserve_fences(bo->base.resv, 1);
782 if (!ret)
783 dma_resv_add_fence(bo->base.resv, &fence->base,
784 DMA_RESV_USAGE_KERNEL);
785 else
786 /* Last resort fallback when we are OOM */
787 dma_fence_wait(&fence->base, false);
788 dma_fence_put(&fence->base);
789 }
790
791
792 /**
793 * vmw_dumb_create - Create a dumb kms buffer
794 *
795 * @file_priv: Pointer to a struct drm_file identifying the caller.
796 * @dev: Pointer to the drm device.
797 * @args: Pointer to a struct drm_mode_create_dumb structure
798 * Return: Zero on success, negative error code on failure.
799 *
800 * This is a driver callback for the core drm create_dumb functionality.
801 * Note that this is very similar to the vmw_bo_alloc ioctl, except
802 * that the arguments have a different format.
803 */
vmw_dumb_create(struct drm_file * file_priv,struct drm_device * dev,struct drm_mode_create_dumb * args)804 int vmw_dumb_create(struct drm_file *file_priv,
805 struct drm_device *dev,
806 struct drm_mode_create_dumb *args)
807 {
808 struct vmw_private *dev_priv = vmw_priv(dev);
809 struct vmw_buffer_object *vbo;
810 int ret;
811
812 args->pitch = args->width * ((args->bpp + 7) / 8);
813 args->size = ALIGN(args->pitch * args->height, PAGE_SIZE);
814
815 ret = vmw_gem_object_create_with_handle(dev_priv, file_priv,
816 args->size, &args->handle,
817 &vbo);
818
819 return ret;
820 }
821
822 /**
823 * vmw_bo_swap_notify - swapout notify callback.
824 *
825 * @bo: The buffer object to be swapped out.
826 */
vmw_bo_swap_notify(struct ttm_buffer_object * bo)827 void vmw_bo_swap_notify(struct ttm_buffer_object *bo)
828 {
829 /* Is @bo embedded in a struct vmw_buffer_object? */
830 if (!bo_is_vmw(bo))
831 return;
832
833 /* Kill any cached kernel maps before swapout */
834 vmw_bo_unmap(vmw_buffer_object(bo));
835 }
836
837
838 /**
839 * vmw_bo_move_notify - TTM move_notify_callback
840 *
841 * @bo: The TTM buffer object about to move.
842 * @mem: The struct ttm_resource indicating to what memory
843 * region the move is taking place.
844 *
845 * Detaches cached maps and device bindings that require that the
846 * buffer doesn't move.
847 */
vmw_bo_move_notify(struct ttm_buffer_object * bo,struct ttm_resource * mem)848 void vmw_bo_move_notify(struct ttm_buffer_object *bo,
849 struct ttm_resource *mem)
850 {
851 struct vmw_buffer_object *vbo;
852
853 /* Make sure @bo is embedded in a struct vmw_buffer_object? */
854 if (!bo_is_vmw(bo))
855 return;
856
857 vbo = container_of(bo, struct vmw_buffer_object, base);
858
859 /*
860 * Kill any cached kernel maps before move to or from VRAM.
861 * With other types of moves, the underlying pages stay the same,
862 * and the map can be kept.
863 */
864 if (mem->mem_type == TTM_PL_VRAM || bo->resource->mem_type == TTM_PL_VRAM)
865 vmw_bo_unmap(vbo);
866
867 /*
868 * If we're moving a backup MOB out of MOB placement, then make sure we
869 * read back all resource content first, and unbind the MOB from
870 * the resource.
871 */
872 if (mem->mem_type != VMW_PL_MOB && bo->resource->mem_type == VMW_PL_MOB)
873 vmw_resource_unbind_list(vbo);
874 }
875