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1// SPDX-License-Identifier: GPL-2.0 OR MIT
2/**************************************************************************
3 *
4 * Copyright © 2011-2023 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 "vmwgfx_bo.h"
30#include "vmwgfx_drv.h"
31
32
33#include <drm/ttm/ttm_placement.h>
34
35static void vmw_bo_release(struct vmw_bo *vbo)
36{
37 WARN_ON(vbo->tbo.base.funcs &&
38 kref_read(&vbo->tbo.base.refcount) != 0);
39 vmw_bo_unmap(vbo);
40 drm_gem_object_release(&vbo->tbo.base);
41}
42
43/**
44 * vmw_bo_free - vmw_bo destructor
45 *
46 * @bo: Pointer to the embedded struct ttm_buffer_object
47 */
48static void vmw_bo_free(struct ttm_buffer_object *bo)
49{
50 struct vmw_bo *vbo = to_vmw_bo(&bo->base);
51
52 WARN_ON(vbo->dirty);
53 WARN_ON(!RB_EMPTY_ROOT(&vbo->res_tree));
54 vmw_bo_release(vbo);
55 kfree(vbo);
56}
57
58/**
59 * vmw_bo_pin_in_placement - Validate a buffer to placement.
60 *
61 * @dev_priv: Driver private.
62 * @buf: DMA buffer to move.
63 * @placement: The placement to pin it.
64 * @interruptible: Use interruptible wait.
65 * Return: Zero on success, Negative error code on failure. In particular
66 * -ERESTARTSYS if interrupted by a signal
67 */
68static int vmw_bo_pin_in_placement(struct vmw_private *dev_priv,
69 struct vmw_bo *buf,
70 struct ttm_placement *placement,
71 bool interruptible)
72{
73 struct ttm_operation_ctx ctx = {interruptible, false };
74 struct ttm_buffer_object *bo = &buf->tbo;
75 int ret;
76
77 vmw_execbuf_release_pinned_bo(dev_priv);
78
79 ret = ttm_bo_reserve(bo, interruptible, false, NULL);
80 if (unlikely(ret != 0))
81 goto err;
82
83 ret = ttm_bo_validate(bo, placement, &ctx);
84 if (!ret)
85 vmw_bo_pin_reserved(buf, true);
86
87 ttm_bo_unreserve(bo);
88err:
89 return ret;
90}
91
92
93/**
94 * vmw_bo_pin_in_vram_or_gmr - Move a buffer to vram or gmr.
95 *
96 * This function takes the reservation_sem in write mode.
97 * Flushes and unpins the query bo to avoid failures.
98 *
99 * @dev_priv: Driver private.
100 * @buf: DMA buffer to move.
101 * @interruptible: Use interruptible wait.
102 * Return: Zero on success, Negative error code on failure. In particular
103 * -ERESTARTSYS if interrupted by a signal
104 */
105int vmw_bo_pin_in_vram_or_gmr(struct vmw_private *dev_priv,
106 struct vmw_bo *buf,
107 bool interruptible)
108{
109 struct ttm_operation_ctx ctx = {interruptible, false };
110 struct ttm_buffer_object *bo = &buf->tbo;
111 int ret;
112
113 vmw_execbuf_release_pinned_bo(dev_priv);
114
115 ret = ttm_bo_reserve(bo, interruptible, false, NULL);
116 if (unlikely(ret != 0))
117 goto err;
118
119 vmw_bo_placement_set(buf,
120 VMW_BO_DOMAIN_GMR | VMW_BO_DOMAIN_VRAM,
121 VMW_BO_DOMAIN_GMR);
122 ret = ttm_bo_validate(bo, &buf->placement, &ctx);
123 if (likely(ret == 0) || ret == -ERESTARTSYS)
124 goto out_unreserve;
125
126 vmw_bo_placement_set(buf,
127 VMW_BO_DOMAIN_VRAM,
128 VMW_BO_DOMAIN_VRAM);
129 ret = ttm_bo_validate(bo, &buf->placement, &ctx);
130
131out_unreserve:
132 if (!ret)
133 vmw_bo_pin_reserved(buf, true);
134
135 ttm_bo_unreserve(bo);
136err:
137 return ret;
138}
139
140
141/**
142 * vmw_bo_pin_in_vram - Move a buffer to vram.
143 *
144 * This function takes the reservation_sem in write mode.
145 * Flushes and unpins the query bo to avoid failures.
146 *
147 * @dev_priv: Driver private.
148 * @buf: DMA buffer to move.
149 * @interruptible: Use interruptible wait.
150 * Return: Zero on success, Negative error code on failure. In particular
151 * -ERESTARTSYS if interrupted by a signal
152 */
153int vmw_bo_pin_in_vram(struct vmw_private *dev_priv,
154 struct vmw_bo *buf,
155 bool interruptible)
156{
157 return vmw_bo_pin_in_placement(dev_priv, buf, &vmw_vram_placement,
158 interruptible);
159}
160
161
162/**
163 * vmw_bo_pin_in_start_of_vram - Move a buffer to start of vram.
164 *
165 * This function takes the reservation_sem in write mode.
166 * Flushes and unpins the query bo to avoid failures.
167 *
168 * @dev_priv: Driver private.
169 * @buf: DMA buffer to pin.
170 * @interruptible: Use interruptible wait.
171 * Return: Zero on success, Negative error code on failure. In particular
172 * -ERESTARTSYS if interrupted by a signal
173 */
174int vmw_bo_pin_in_start_of_vram(struct vmw_private *dev_priv,
175 struct vmw_bo *buf,
176 bool interruptible)
177{
178 struct ttm_operation_ctx ctx = {interruptible, false };
179 struct ttm_buffer_object *bo = &buf->tbo;
180 int ret = 0;
181
182 vmw_execbuf_release_pinned_bo(dev_priv);
183 ret = ttm_bo_reserve(bo, interruptible, false, NULL);
184 if (unlikely(ret != 0))
185 goto err_unlock;
186
187 /*
188 * Is this buffer already in vram but not at the start of it?
189 * In that case, evict it first because TTM isn't good at handling
190 * that situation.
191 */
192 if (bo->resource->mem_type == TTM_PL_VRAM &&
193 bo->resource->start < PFN_UP(bo->resource->size) &&
194 bo->resource->start > 0 &&
195 buf->tbo.pin_count == 0) {
196 ctx.interruptible = false;
197 vmw_bo_placement_set(buf,
198 VMW_BO_DOMAIN_SYS,
199 VMW_BO_DOMAIN_SYS);
200 (void)ttm_bo_validate(bo, &buf->placement, &ctx);
201 }
202
203 vmw_bo_placement_set(buf,
204 VMW_BO_DOMAIN_VRAM,
205 VMW_BO_DOMAIN_VRAM);
206 buf->places[0].lpfn = PFN_UP(bo->resource->size);
207 buf->busy_places[0].lpfn = PFN_UP(bo->resource->size);
208 ret = ttm_bo_validate(bo, &buf->placement, &ctx);
209
210 /* For some reason we didn't end up at the start of vram */
211 WARN_ON(ret == 0 && bo->resource->start != 0);
212 if (!ret)
213 vmw_bo_pin_reserved(buf, true);
214
215 ttm_bo_unreserve(bo);
216err_unlock:
217
218 return ret;
219}
220
221
222/**
223 * vmw_bo_unpin - Unpin the buffer given buffer, does not move the buffer.
224 *
225 * This function takes the reservation_sem in write mode.
226 *
227 * @dev_priv: Driver private.
228 * @buf: DMA buffer to unpin.
229 * @interruptible: Use interruptible wait.
230 * Return: Zero on success, Negative error code on failure. In particular
231 * -ERESTARTSYS if interrupted by a signal
232 */
233int vmw_bo_unpin(struct vmw_private *dev_priv,
234 struct vmw_bo *buf,
235 bool interruptible)
236{
237 struct ttm_buffer_object *bo = &buf->tbo;
238 int ret;
239
240 ret = ttm_bo_reserve(bo, interruptible, false, NULL);
241 if (unlikely(ret != 0))
242 goto err;
243
244 vmw_bo_pin_reserved(buf, false);
245
246 ttm_bo_unreserve(bo);
247
248err:
249 return ret;
250}
251
252/**
253 * vmw_bo_get_guest_ptr - Get the guest ptr representing the current placement
254 * of a buffer.
255 *
256 * @bo: Pointer to a struct ttm_buffer_object. Must be pinned or reserved.
257 * @ptr: SVGAGuestPtr returning the result.
258 */
259void vmw_bo_get_guest_ptr(const struct ttm_buffer_object *bo,
260 SVGAGuestPtr *ptr)
261{
262 if (bo->resource->mem_type == TTM_PL_VRAM) {
263 ptr->gmrId = SVGA_GMR_FRAMEBUFFER;
264 ptr->offset = bo->resource->start << PAGE_SHIFT;
265 } else {
266 ptr->gmrId = bo->resource->start;
267 ptr->offset = 0;
268 }
269}
270
271
272/**
273 * vmw_bo_pin_reserved - Pin or unpin a buffer object without moving it.
274 *
275 * @vbo: The buffer object. Must be reserved.
276 * @pin: Whether to pin or unpin.
277 *
278 */
279void vmw_bo_pin_reserved(struct vmw_bo *vbo, bool pin)
280{
281 struct ttm_operation_ctx ctx = { false, true };
282 struct ttm_place pl;
283 struct ttm_placement placement;
284 struct ttm_buffer_object *bo = &vbo->tbo;
285 uint32_t old_mem_type = bo->resource->mem_type;
286 int ret;
287
288 dma_resv_assert_held(bo->base.resv);
289
290 if (pin == !!bo->pin_count)
291 return;
292
293 pl.fpfn = 0;
294 pl.lpfn = 0;
295 pl.mem_type = bo->resource->mem_type;
296 pl.flags = bo->resource->placement;
297
298 memset(&placement, 0, sizeof(placement));
299 placement.num_placement = 1;
300 placement.placement = &pl;
301
302 ret = ttm_bo_validate(bo, &placement, &ctx);
303
304 BUG_ON(ret != 0 || bo->resource->mem_type != old_mem_type);
305
306 if (pin)
307 ttm_bo_pin(bo);
308 else
309 ttm_bo_unpin(bo);
310}
311
312/**
313 * vmw_bo_map_and_cache - Map a buffer object and cache the map
314 *
315 * @vbo: The buffer object to map
316 * Return: A kernel virtual address or NULL if mapping failed.
317 *
318 * This function maps a buffer object into the kernel address space, or
319 * returns the virtual kernel address of an already existing map. The virtual
320 * address remains valid as long as the buffer object is pinned or reserved.
321 * The cached map is torn down on either
322 * 1) Buffer object move
323 * 2) Buffer object swapout
324 * 3) Buffer object destruction
325 *
326 */
327void *vmw_bo_map_and_cache(struct vmw_bo *vbo)
328{
329 struct ttm_buffer_object *bo = &vbo->tbo;
330 bool not_used;
331 void *virtual;
332 int ret;
333
334 virtual = ttm_kmap_obj_virtual(&vbo->map, ¬_used);
335 if (virtual)
336 return virtual;
337
338 ret = ttm_bo_kmap(bo, 0, PFN_UP(bo->base.size), &vbo->map);
339 if (ret)
340 DRM_ERROR("Buffer object map failed: %d.\n", ret);
341
342 return ttm_kmap_obj_virtual(&vbo->map, ¬_used);
343}
344
345
346/**
347 * vmw_bo_unmap - Tear down a cached buffer object map.
348 *
349 * @vbo: The buffer object whose map we are tearing down.
350 *
351 * This function tears down a cached map set up using
352 * vmw_bo_map_and_cache().
353 */
354void vmw_bo_unmap(struct vmw_bo *vbo)
355{
356 if (vbo->map.bo == NULL)
357 return;
358
359 ttm_bo_kunmap(&vbo->map);
360 vbo->map.bo = NULL;
361}
362
363
364/**
365 * vmw_bo_init - Initialize a vmw buffer object
366 *
367 * @dev_priv: Pointer to the device private struct
368 * @vmw_bo: Buffer object to initialize
369 * @params: Parameters used to initialize the buffer object
370 * @destroy: The function used to delete the buffer object
371 * Returns: Zero on success, negative error code on error.
372 *
373 */
374static int vmw_bo_init(struct vmw_private *dev_priv,
375 struct vmw_bo *vmw_bo,
376 struct vmw_bo_params *params,
377 void (*destroy)(struct ttm_buffer_object *))
378{
379 struct ttm_operation_ctx ctx = {
380 .interruptible = params->bo_type != ttm_bo_type_kernel,
381 .no_wait_gpu = false,
382 .resv = params->resv,
383 };
384 struct ttm_device *bdev = &dev_priv->bdev;
385 struct drm_device *vdev = &dev_priv->drm;
386 int ret;
387
388 memset(vmw_bo, 0, sizeof(*vmw_bo));
389
390 BUILD_BUG_ON(TTM_MAX_BO_PRIORITY <= 3);
391 vmw_bo->tbo.priority = 3;
392 vmw_bo->res_tree = RB_ROOT;
393
394 params->size = ALIGN(params->size, PAGE_SIZE);
395 drm_gem_private_object_init(vdev, &vmw_bo->tbo.base, params->size);
396
397 vmw_bo_placement_set(vmw_bo, params->domain, params->busy_domain);
398 ret = ttm_bo_init_reserved(bdev, &vmw_bo->tbo, params->bo_type,
399 &vmw_bo->placement, 0, &ctx,
400 params->sg, params->resv, destroy);
401 if (unlikely(ret))
402 return ret;
403
404 if (params->pin)
405 ttm_bo_pin(&vmw_bo->tbo);
406 ttm_bo_unreserve(&vmw_bo->tbo);
407
408 return 0;
409}
410
411int vmw_bo_create(struct vmw_private *vmw,
412 struct vmw_bo_params *params,
413 struct vmw_bo **p_bo)
414{
415 int ret;
416
417 *p_bo = kmalloc(sizeof(**p_bo), GFP_KERNEL);
418 if (unlikely(!*p_bo)) {
419 DRM_ERROR("Failed to allocate a buffer.\n");
420 return -ENOMEM;
421 }
422
423 /*
424 * vmw_bo_init will delete the *p_bo object if it fails
425 */
426 ret = vmw_bo_init(vmw, *p_bo, params, vmw_bo_free);
427 if (unlikely(ret != 0))
428 goto out_error;
429
430 return ret;
431out_error:
432 *p_bo = NULL;
433 return ret;
434}
435
436/**
437 * vmw_user_bo_synccpu_grab - Grab a struct vmw_bo for cpu
438 * access, idling previous GPU operations on the buffer and optionally
439 * blocking it for further command submissions.
440 *
441 * @vmw_bo: Pointer to the buffer object being grabbed for CPU access
442 * @flags: Flags indicating how the grab should be performed.
443 * Return: Zero on success, Negative error code on error. In particular,
444 * -EBUSY will be returned if a dontblock operation is requested and the
445 * buffer object is busy, and -ERESTARTSYS will be returned if a wait is
446 * interrupted by a signal.
447 *
448 * A blocking grab will be automatically released when @tfile is closed.
449 */
450static int vmw_user_bo_synccpu_grab(struct vmw_bo *vmw_bo,
451 uint32_t flags)
452{
453 bool nonblock = !!(flags & drm_vmw_synccpu_dontblock);
454 struct ttm_buffer_object *bo = &vmw_bo->tbo;
455 int ret;
456
457 if (flags & drm_vmw_synccpu_allow_cs) {
458 long lret;
459
460 lret = dma_resv_wait_timeout(bo->base.resv, DMA_RESV_USAGE_READ,
461 true, nonblock ? 0 :
462 MAX_SCHEDULE_TIMEOUT);
463 if (!lret)
464 return -EBUSY;
465 else if (lret < 0)
466 return lret;
467 return 0;
468 }
469
470 ret = ttm_bo_reserve(bo, true, nonblock, NULL);
471 if (unlikely(ret != 0))
472 return ret;
473
474 ret = ttm_bo_wait(bo, true, nonblock);
475 if (likely(ret == 0))
476 atomic_inc(&vmw_bo->cpu_writers);
477
478 ttm_bo_unreserve(bo);
479 if (unlikely(ret != 0))
480 return ret;
481
482 return ret;
483}
484
485/**
486 * vmw_user_bo_synccpu_release - Release a previous grab for CPU access,
487 * and unblock command submission on the buffer if blocked.
488 *
489 * @filp: Identifying the caller.
490 * @handle: Handle identifying the buffer object.
491 * @flags: Flags indicating the type of release.
492 */
493static int vmw_user_bo_synccpu_release(struct drm_file *filp,
494 uint32_t handle,
495 uint32_t flags)
496{
497 struct vmw_bo *vmw_bo;
498 int ret = vmw_user_bo_lookup(filp, handle, &vmw_bo);
499
500 if (!ret) {
501 if (!(flags & drm_vmw_synccpu_allow_cs)) {
502 atomic_dec(&vmw_bo->cpu_writers);
503 }
504 vmw_user_bo_unref(&vmw_bo);
505 }
506
507 return ret;
508}
509
510
511/**
512 * vmw_user_bo_synccpu_ioctl - ioctl function implementing the synccpu
513 * functionality.
514 *
515 * @dev: Identifies the drm device.
516 * @data: Pointer to the ioctl argument.
517 * @file_priv: Identifies the caller.
518 * Return: Zero on success, negative error code on error.
519 *
520 * This function checks the ioctl arguments for validity and calls the
521 * relevant synccpu functions.
522 */
523int vmw_user_bo_synccpu_ioctl(struct drm_device *dev, void *data,
524 struct drm_file *file_priv)
525{
526 struct drm_vmw_synccpu_arg *arg =
527 (struct drm_vmw_synccpu_arg *) data;
528 struct vmw_bo *vbo;
529 int ret;
530
531 if ((arg->flags & (drm_vmw_synccpu_read | drm_vmw_synccpu_write)) == 0
532 || (arg->flags & ~(drm_vmw_synccpu_read | drm_vmw_synccpu_write |
533 drm_vmw_synccpu_dontblock |
534 drm_vmw_synccpu_allow_cs)) != 0) {
535 DRM_ERROR("Illegal synccpu flags.\n");
536 return -EINVAL;
537 }
538
539 switch (arg->op) {
540 case drm_vmw_synccpu_grab:
541 ret = vmw_user_bo_lookup(file_priv, arg->handle, &vbo);
542 if (unlikely(ret != 0))
543 return ret;
544
545 ret = vmw_user_bo_synccpu_grab(vbo, arg->flags);
546 vmw_user_bo_unref(&vbo);
547 if (unlikely(ret != 0)) {
548 if (ret == -ERESTARTSYS || ret == -EBUSY)
549 return -EBUSY;
550 DRM_ERROR("Failed synccpu grab on handle 0x%08x.\n",
551 (unsigned int) arg->handle);
552 return ret;
553 }
554 break;
555 case drm_vmw_synccpu_release:
556 ret = vmw_user_bo_synccpu_release(file_priv,
557 arg->handle,
558 arg->flags);
559 if (unlikely(ret != 0)) {
560 DRM_ERROR("Failed synccpu release on handle 0x%08x.\n",
561 (unsigned int) arg->handle);
562 return ret;
563 }
564 break;
565 default:
566 DRM_ERROR("Invalid synccpu operation.\n");
567 return -EINVAL;
568 }
569
570 return 0;
571}
572
573/**
574 * vmw_bo_unref_ioctl - Generic handle close ioctl.
575 *
576 * @dev: Identifies the drm device.
577 * @data: Pointer to the ioctl argument.
578 * @file_priv: Identifies the caller.
579 * Return: Zero on success, negative error code on error.
580 *
581 * This function checks the ioctl arguments for validity and closes a
582 * handle to a TTM base object, optionally freeing the object.
583 */
584int vmw_bo_unref_ioctl(struct drm_device *dev, void *data,
585 struct drm_file *file_priv)
586{
587 struct drm_vmw_unref_dmabuf_arg *arg =
588 (struct drm_vmw_unref_dmabuf_arg *)data;
589
590 return drm_gem_handle_delete(file_priv, arg->handle);
591}
592
593
594/**
595 * vmw_user_bo_lookup - Look up a vmw user buffer object from a handle.
596 *
597 * @filp: The file the handle is registered with.
598 * @handle: The user buffer object handle
599 * @out: Pointer to a where a pointer to the embedded
600 * struct vmw_bo should be placed.
601 * Return: Zero on success, Negative error code on error.
602 *
603 * The vmw buffer object pointer will be refcounted (both ttm and gem)
604 */
605int vmw_user_bo_lookup(struct drm_file *filp,
606 u32 handle,
607 struct vmw_bo **out)
608{
609 struct drm_gem_object *gobj;
610
611 gobj = drm_gem_object_lookup(filp, handle);
612 if (!gobj) {
613 DRM_ERROR("Invalid buffer object handle 0x%08lx.\n",
614 (unsigned long)handle);
615 return -ESRCH;
616 }
617
618 *out = to_vmw_bo(gobj);
619
620 return 0;
621}
622
623/**
624 * vmw_bo_fence_single - Utility function to fence a single TTM buffer
625 * object without unreserving it.
626 *
627 * @bo: Pointer to the struct ttm_buffer_object to fence.
628 * @fence: Pointer to the fence. If NULL, this function will
629 * insert a fence into the command stream..
630 *
631 * Contrary to the ttm_eu version of this function, it takes only
632 * a single buffer object instead of a list, and it also doesn't
633 * unreserve the buffer object, which needs to be done separately.
634 */
635void vmw_bo_fence_single(struct ttm_buffer_object *bo,
636 struct vmw_fence_obj *fence)
637{
638 struct ttm_device *bdev = bo->bdev;
639 struct vmw_private *dev_priv = vmw_priv_from_ttm(bdev);
640 int ret;
641
642 if (fence == NULL)
643 vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
644 else
645 dma_fence_get(&fence->base);
646
647 ret = dma_resv_reserve_fences(bo->base.resv, 1);
648 if (!ret)
649 dma_resv_add_fence(bo->base.resv, &fence->base,
650 DMA_RESV_USAGE_KERNEL);
651 else
652 /* Last resort fallback when we are OOM */
653 dma_fence_wait(&fence->base, false);
654 dma_fence_put(&fence->base);
655}
656
657
658/**
659 * vmw_dumb_create - Create a dumb kms buffer
660 *
661 * @file_priv: Pointer to a struct drm_file identifying the caller.
662 * @dev: Pointer to the drm device.
663 * @args: Pointer to a struct drm_mode_create_dumb structure
664 * Return: Zero on success, negative error code on failure.
665 *
666 * This is a driver callback for the core drm create_dumb functionality.
667 * Note that this is very similar to the vmw_bo_alloc ioctl, except
668 * that the arguments have a different format.
669 */
670int vmw_dumb_create(struct drm_file *file_priv,
671 struct drm_device *dev,
672 struct drm_mode_create_dumb *args)
673{
674 struct vmw_private *dev_priv = vmw_priv(dev);
675 struct vmw_bo *vbo;
676 int cpp = DIV_ROUND_UP(args->bpp, 8);
677 int ret;
678
679 switch (cpp) {
680 case 1: /* DRM_FORMAT_C8 */
681 case 2: /* DRM_FORMAT_RGB565 */
682 case 4: /* DRM_FORMAT_XRGB8888 */
683 break;
684 default:
685 /*
686 * Dumb buffers don't allow anything else.
687 * This is tested via IGT's dumb_buffers
688 */
689 return -EINVAL;
690 }
691
692 args->pitch = args->width * cpp;
693 args->size = ALIGN(args->pitch * args->height, PAGE_SIZE);
694
695 ret = vmw_gem_object_create_with_handle(dev_priv, file_priv,
696 args->size, &args->handle,
697 &vbo);
698 /* drop reference from allocate - handle holds it now */
699 drm_gem_object_put(&vbo->tbo.base);
700 return ret;
701}
702
703/**
704 * vmw_bo_swap_notify - swapout notify callback.
705 *
706 * @bo: The buffer object to be swapped out.
707 */
708void vmw_bo_swap_notify(struct ttm_buffer_object *bo)
709{
710 /* Kill any cached kernel maps before swapout */
711 vmw_bo_unmap(to_vmw_bo(&bo->base));
712}
713
714
715/**
716 * vmw_bo_move_notify - TTM move_notify_callback
717 *
718 * @bo: The TTM buffer object about to move.
719 * @mem: The struct ttm_resource indicating to what memory
720 * region the move is taking place.
721 *
722 * Detaches cached maps and device bindings that require that the
723 * buffer doesn't move.
724 */
725void vmw_bo_move_notify(struct ttm_buffer_object *bo,
726 struct ttm_resource *mem)
727{
728 struct vmw_bo *vbo = to_vmw_bo(&bo->base);
729
730 /*
731 * Kill any cached kernel maps before move to or from VRAM.
732 * With other types of moves, the underlying pages stay the same,
733 * and the map can be kept.
734 */
735 if (mem->mem_type == TTM_PL_VRAM || bo->resource->mem_type == TTM_PL_VRAM)
736 vmw_bo_unmap(vbo);
737
738 /*
739 * If we're moving a backup MOB out of MOB placement, then make sure we
740 * read back all resource content first, and unbind the MOB from
741 * the resource.
742 */
743 if (mem->mem_type != VMW_PL_MOB && bo->resource->mem_type == VMW_PL_MOB)
744 vmw_resource_unbind_list(vbo);
745}
746
747static u32 placement_flags(u32 domain, u32 desired, u32 fallback)
748{
749 if (desired & fallback & domain)
750 return 0;
751
752 if (desired & domain)
753 return TTM_PL_FLAG_DESIRED;
754
755 return TTM_PL_FLAG_FALLBACK;
756}
757
758static u32
759set_placement_list(struct ttm_place *pl, u32 desired, u32 fallback)
760{
761 u32 domain = desired | fallback;
762 u32 n = 0;
763
764 /*
765 * The placements are ordered according to our preferences
766 */
767 if (domain & VMW_BO_DOMAIN_MOB) {
768 pl[n].mem_type = VMW_PL_MOB;
769 pl[n].flags = placement_flags(VMW_BO_DOMAIN_MOB, desired,
770 fallback);
771 pl[n].fpfn = 0;
772 pl[n].lpfn = 0;
773 n++;
774 }
775 if (domain & VMW_BO_DOMAIN_GMR) {
776 pl[n].mem_type = VMW_PL_GMR;
777 pl[n].flags = placement_flags(VMW_BO_DOMAIN_GMR, desired,
778 fallback);
779 pl[n].fpfn = 0;
780 pl[n].lpfn = 0;
781 n++;
782 }
783 if (domain & VMW_BO_DOMAIN_VRAM) {
784 pl[n].mem_type = TTM_PL_VRAM;
785 pl[n].flags = placement_flags(VMW_BO_DOMAIN_VRAM, desired,
786 fallback);
787 pl[n].fpfn = 0;
788 pl[n].lpfn = 0;
789 n++;
790 }
791 if (domain & VMW_BO_DOMAIN_WAITABLE_SYS) {
792 pl[n].mem_type = VMW_PL_SYSTEM;
793 pl[n].flags = placement_flags(VMW_BO_DOMAIN_WAITABLE_SYS,
794 desired, fallback);
795 pl[n].fpfn = 0;
796 pl[n].lpfn = 0;
797 n++;
798 }
799 if (domain & VMW_BO_DOMAIN_SYS) {
800 pl[n].mem_type = TTM_PL_SYSTEM;
801 pl[n].flags = placement_flags(VMW_BO_DOMAIN_SYS, desired,
802 fallback);
803 pl[n].fpfn = 0;
804 pl[n].lpfn = 0;
805 n++;
806 }
807
808 WARN_ON(!n);
809 if (!n) {
810 pl[n].mem_type = TTM_PL_SYSTEM;
811 pl[n].flags = 0;
812 pl[n].fpfn = 0;
813 pl[n].lpfn = 0;
814 n++;
815 }
816 return n;
817}
818
819void vmw_bo_placement_set(struct vmw_bo *bo, u32 domain, u32 busy_domain)
820{
821 struct ttm_device *bdev = bo->tbo.bdev;
822 struct vmw_private *vmw = vmw_priv_from_ttm(bdev);
823 struct ttm_placement *pl = &bo->placement;
824 bool mem_compatible = false;
825 u32 i;
826
827 pl->placement = bo->places;
828 pl->num_placement = set_placement_list(bo->places, domain, busy_domain);
829
830 if (drm_debug_enabled(DRM_UT_DRIVER) && bo->tbo.resource) {
831 for (i = 0; i < pl->num_placement; ++i) {
832 if (bo->tbo.resource->mem_type == TTM_PL_SYSTEM ||
833 bo->tbo.resource->mem_type == pl->placement[i].mem_type)
834 mem_compatible = true;
835 }
836 if (!mem_compatible)
837 drm_warn(&vmw->drm,
838 "%s: Incompatible transition from "
839 "bo->base.resource->mem_type = %u to domain = %u\n",
840 __func__, bo->tbo.resource->mem_type, domain);
841 }
842
843}
844
845void vmw_bo_placement_set_default_accelerated(struct vmw_bo *bo)
846{
847 struct ttm_device *bdev = bo->tbo.bdev;
848 struct vmw_private *vmw = vmw_priv_from_ttm(bdev);
849 u32 domain = VMW_BO_DOMAIN_GMR | VMW_BO_DOMAIN_VRAM;
850
851 if (vmw->has_mob)
852 domain = VMW_BO_DOMAIN_MOB;
853
854 vmw_bo_placement_set(bo, domain, domain);
855}