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1/**************************************************************************
2 *
3 * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
4 * All Rights Reserved.
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 "vmwgfx_drv.h"
29#include "vmwgfx_drm.h"
30#include "ttm/ttm_object.h"
31#include "ttm/ttm_placement.h"
32#include "drmP.h"
33
34#define VMW_RES_CONTEXT ttm_driver_type0
35#define VMW_RES_SURFACE ttm_driver_type1
36#define VMW_RES_STREAM ttm_driver_type2
37
38struct vmw_user_context {
39 struct ttm_base_object base;
40 struct vmw_resource res;
41};
42
43struct vmw_user_surface {
44 struct ttm_base_object base;
45 struct vmw_surface srf;
46};
47
48struct vmw_user_dma_buffer {
49 struct ttm_base_object base;
50 struct vmw_dma_buffer dma;
51};
52
53struct vmw_bo_user_rep {
54 uint32_t handle;
55 uint64_t map_handle;
56};
57
58struct vmw_stream {
59 struct vmw_resource res;
60 uint32_t stream_id;
61};
62
63struct vmw_user_stream {
64 struct ttm_base_object base;
65 struct vmw_stream stream;
66};
67
68static inline struct vmw_dma_buffer *
69vmw_dma_buffer(struct ttm_buffer_object *bo)
70{
71 return container_of(bo, struct vmw_dma_buffer, base);
72}
73
74static inline struct vmw_user_dma_buffer *
75vmw_user_dma_buffer(struct ttm_buffer_object *bo)
76{
77 struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
78 return container_of(vmw_bo, struct vmw_user_dma_buffer, dma);
79}
80
81struct vmw_resource *vmw_resource_reference(struct vmw_resource *res)
82{
83 kref_get(&res->kref);
84 return res;
85}
86
87static void vmw_resource_release(struct kref *kref)
88{
89 struct vmw_resource *res =
90 container_of(kref, struct vmw_resource, kref);
91 struct vmw_private *dev_priv = res->dev_priv;
92
93 idr_remove(res->idr, res->id);
94 write_unlock(&dev_priv->resource_lock);
95
96 if (likely(res->hw_destroy != NULL))
97 res->hw_destroy(res);
98
99 if (res->res_free != NULL)
100 res->res_free(res);
101 else
102 kfree(res);
103
104 write_lock(&dev_priv->resource_lock);
105}
106
107void vmw_resource_unreference(struct vmw_resource **p_res)
108{
109 struct vmw_resource *res = *p_res;
110 struct vmw_private *dev_priv = res->dev_priv;
111
112 *p_res = NULL;
113 write_lock(&dev_priv->resource_lock);
114 kref_put(&res->kref, vmw_resource_release);
115 write_unlock(&dev_priv->resource_lock);
116}
117
118static int vmw_resource_init(struct vmw_private *dev_priv,
119 struct vmw_resource *res,
120 struct idr *idr,
121 enum ttm_object_type obj_type,
122 void (*res_free) (struct vmw_resource *res))
123{
124 int ret;
125
126 kref_init(&res->kref);
127 res->hw_destroy = NULL;
128 res->res_free = res_free;
129 res->res_type = obj_type;
130 res->idr = idr;
131 res->avail = false;
132 res->dev_priv = dev_priv;
133
134 do {
135 if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0))
136 return -ENOMEM;
137
138 write_lock(&dev_priv->resource_lock);
139 ret = idr_get_new_above(idr, res, 1, &res->id);
140 write_unlock(&dev_priv->resource_lock);
141
142 } while (ret == -EAGAIN);
143
144 return ret;
145}
146
147/**
148 * vmw_resource_activate
149 *
150 * @res: Pointer to the newly created resource
151 * @hw_destroy: Destroy function. NULL if none.
152 *
153 * Activate a resource after the hardware has been made aware of it.
154 * Set tye destroy function to @destroy. Typically this frees the
155 * resource and destroys the hardware resources associated with it.
156 * Activate basically means that the function vmw_resource_lookup will
157 * find it.
158 */
159
160static void vmw_resource_activate(struct vmw_resource *res,
161 void (*hw_destroy) (struct vmw_resource *))
162{
163 struct vmw_private *dev_priv = res->dev_priv;
164
165 write_lock(&dev_priv->resource_lock);
166 res->avail = true;
167 res->hw_destroy = hw_destroy;
168 write_unlock(&dev_priv->resource_lock);
169}
170
171struct vmw_resource *vmw_resource_lookup(struct vmw_private *dev_priv,
172 struct idr *idr, int id)
173{
174 struct vmw_resource *res;
175
176 read_lock(&dev_priv->resource_lock);
177 res = idr_find(idr, id);
178 if (res && res->avail)
179 kref_get(&res->kref);
180 else
181 res = NULL;
182 read_unlock(&dev_priv->resource_lock);
183
184 if (unlikely(res == NULL))
185 return NULL;
186
187 return res;
188}
189
190/**
191 * Context management:
192 */
193
194static void vmw_hw_context_destroy(struct vmw_resource *res)
195{
196
197 struct vmw_private *dev_priv = res->dev_priv;
198 struct {
199 SVGA3dCmdHeader header;
200 SVGA3dCmdDestroyContext body;
201 } *cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
202
203 if (unlikely(cmd == NULL)) {
204 DRM_ERROR("Failed reserving FIFO space for surface "
205 "destruction.\n");
206 return;
207 }
208
209 cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DESTROY);
210 cmd->header.size = cpu_to_le32(sizeof(cmd->body));
211 cmd->body.cid = cpu_to_le32(res->id);
212
213 vmw_fifo_commit(dev_priv, sizeof(*cmd));
214 vmw_3d_resource_dec(dev_priv);
215}
216
217static int vmw_context_init(struct vmw_private *dev_priv,
218 struct vmw_resource *res,
219 void (*res_free) (struct vmw_resource *res))
220{
221 int ret;
222
223 struct {
224 SVGA3dCmdHeader header;
225 SVGA3dCmdDefineContext body;
226 } *cmd;
227
228 ret = vmw_resource_init(dev_priv, res, &dev_priv->context_idr,
229 VMW_RES_CONTEXT, res_free);
230
231 if (unlikely(ret != 0)) {
232 if (res_free == NULL)
233 kfree(res);
234 else
235 res_free(res);
236 return ret;
237 }
238
239 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
240 if (unlikely(cmd == NULL)) {
241 DRM_ERROR("Fifo reserve failed.\n");
242 vmw_resource_unreference(&res);
243 return -ENOMEM;
244 }
245
246 cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DEFINE);
247 cmd->header.size = cpu_to_le32(sizeof(cmd->body));
248 cmd->body.cid = cpu_to_le32(res->id);
249
250 vmw_fifo_commit(dev_priv, sizeof(*cmd));
251 (void) vmw_3d_resource_inc(dev_priv);
252 vmw_resource_activate(res, vmw_hw_context_destroy);
253 return 0;
254}
255
256struct vmw_resource *vmw_context_alloc(struct vmw_private *dev_priv)
257{
258 struct vmw_resource *res = kmalloc(sizeof(*res), GFP_KERNEL);
259 int ret;
260
261 if (unlikely(res == NULL))
262 return NULL;
263
264 ret = vmw_context_init(dev_priv, res, NULL);
265 return (ret == 0) ? res : NULL;
266}
267
268/**
269 * User-space context management:
270 */
271
272static void vmw_user_context_free(struct vmw_resource *res)
273{
274 struct vmw_user_context *ctx =
275 container_of(res, struct vmw_user_context, res);
276
277 kfree(ctx);
278}
279
280/**
281 * This function is called when user space has no more references on the
282 * base object. It releases the base-object's reference on the resource object.
283 */
284
285static void vmw_user_context_base_release(struct ttm_base_object **p_base)
286{
287 struct ttm_base_object *base = *p_base;
288 struct vmw_user_context *ctx =
289 container_of(base, struct vmw_user_context, base);
290 struct vmw_resource *res = &ctx->res;
291
292 *p_base = NULL;
293 vmw_resource_unreference(&res);
294}
295
296int vmw_context_destroy_ioctl(struct drm_device *dev, void *data,
297 struct drm_file *file_priv)
298{
299 struct vmw_private *dev_priv = vmw_priv(dev);
300 struct vmw_resource *res;
301 struct vmw_user_context *ctx;
302 struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
303 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
304 int ret = 0;
305
306 res = vmw_resource_lookup(dev_priv, &dev_priv->context_idr, arg->cid);
307 if (unlikely(res == NULL))
308 return -EINVAL;
309
310 if (res->res_free != &vmw_user_context_free) {
311 ret = -EINVAL;
312 goto out;
313 }
314
315 ctx = container_of(res, struct vmw_user_context, res);
316 if (ctx->base.tfile != tfile && !ctx->base.shareable) {
317 ret = -EPERM;
318 goto out;
319 }
320
321 ttm_ref_object_base_unref(tfile, ctx->base.hash.key, TTM_REF_USAGE);
322out:
323 vmw_resource_unreference(&res);
324 return ret;
325}
326
327int vmw_context_define_ioctl(struct drm_device *dev, void *data,
328 struct drm_file *file_priv)
329{
330 struct vmw_private *dev_priv = vmw_priv(dev);
331 struct vmw_user_context *ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
332 struct vmw_resource *res;
333 struct vmw_resource *tmp;
334 struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
335 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
336 int ret;
337
338 if (unlikely(ctx == NULL))
339 return -ENOMEM;
340
341 res = &ctx->res;
342 ctx->base.shareable = false;
343 ctx->base.tfile = NULL;
344
345 ret = vmw_context_init(dev_priv, res, vmw_user_context_free);
346 if (unlikely(ret != 0))
347 return ret;
348
349 tmp = vmw_resource_reference(&ctx->res);
350 ret = ttm_base_object_init(tfile, &ctx->base, false, VMW_RES_CONTEXT,
351 &vmw_user_context_base_release, NULL);
352
353 if (unlikely(ret != 0)) {
354 vmw_resource_unreference(&tmp);
355 goto out_err;
356 }
357
358 arg->cid = res->id;
359out_err:
360 vmw_resource_unreference(&res);
361 return ret;
362
363}
364
365int vmw_context_check(struct vmw_private *dev_priv,
366 struct ttm_object_file *tfile,
367 int id)
368{
369 struct vmw_resource *res;
370 int ret = 0;
371
372 read_lock(&dev_priv->resource_lock);
373 res = idr_find(&dev_priv->context_idr, id);
374 if (res && res->avail) {
375 struct vmw_user_context *ctx =
376 container_of(res, struct vmw_user_context, res);
377 if (ctx->base.tfile != tfile && !ctx->base.shareable)
378 ret = -EPERM;
379 } else
380 ret = -EINVAL;
381 read_unlock(&dev_priv->resource_lock);
382
383 return ret;
384}
385
386
387/**
388 * Surface management.
389 */
390
391static void vmw_hw_surface_destroy(struct vmw_resource *res)
392{
393
394 struct vmw_private *dev_priv = res->dev_priv;
395 struct {
396 SVGA3dCmdHeader header;
397 SVGA3dCmdDestroySurface body;
398 } *cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
399
400 if (unlikely(cmd == NULL)) {
401 DRM_ERROR("Failed reserving FIFO space for surface "
402 "destruction.\n");
403 return;
404 }
405
406 cmd->header.id = cpu_to_le32(SVGA_3D_CMD_SURFACE_DESTROY);
407 cmd->header.size = cpu_to_le32(sizeof(cmd->body));
408 cmd->body.sid = cpu_to_le32(res->id);
409
410 vmw_fifo_commit(dev_priv, sizeof(*cmd));
411 vmw_3d_resource_dec(dev_priv);
412}
413
414void vmw_surface_res_free(struct vmw_resource *res)
415{
416 struct vmw_surface *srf = container_of(res, struct vmw_surface, res);
417
418 kfree(srf->sizes);
419 kfree(srf->snooper.image);
420 kfree(srf);
421}
422
423int vmw_surface_init(struct vmw_private *dev_priv,
424 struct vmw_surface *srf,
425 void (*res_free) (struct vmw_resource *res))
426{
427 int ret;
428 struct {
429 SVGA3dCmdHeader header;
430 SVGA3dCmdDefineSurface body;
431 } *cmd;
432 SVGA3dSize *cmd_size;
433 struct vmw_resource *res = &srf->res;
434 struct drm_vmw_size *src_size;
435 size_t submit_size;
436 uint32_t cmd_len;
437 int i;
438
439 BUG_ON(res_free == NULL);
440 ret = vmw_resource_init(dev_priv, res, &dev_priv->surface_idr,
441 VMW_RES_SURFACE, res_free);
442
443 if (unlikely(ret != 0)) {
444 res_free(res);
445 return ret;
446 }
447
448 submit_size = sizeof(*cmd) + srf->num_sizes * sizeof(SVGA3dSize);
449 cmd_len = sizeof(cmd->body) + srf->num_sizes * sizeof(SVGA3dSize);
450
451 cmd = vmw_fifo_reserve(dev_priv, submit_size);
452 if (unlikely(cmd == NULL)) {
453 DRM_ERROR("Fifo reserve failed for create surface.\n");
454 vmw_resource_unreference(&res);
455 return -ENOMEM;
456 }
457
458 cmd->header.id = cpu_to_le32(SVGA_3D_CMD_SURFACE_DEFINE);
459 cmd->header.size = cpu_to_le32(cmd_len);
460 cmd->body.sid = cpu_to_le32(res->id);
461 cmd->body.surfaceFlags = cpu_to_le32(srf->flags);
462 cmd->body.format = cpu_to_le32(srf->format);
463 for (i = 0; i < DRM_VMW_MAX_SURFACE_FACES; ++i) {
464 cmd->body.face[i].numMipLevels =
465 cpu_to_le32(srf->mip_levels[i]);
466 }
467
468 cmd += 1;
469 cmd_size = (SVGA3dSize *) cmd;
470 src_size = srf->sizes;
471
472 for (i = 0; i < srf->num_sizes; ++i, cmd_size++, src_size++) {
473 cmd_size->width = cpu_to_le32(src_size->width);
474 cmd_size->height = cpu_to_le32(src_size->height);
475 cmd_size->depth = cpu_to_le32(src_size->depth);
476 }
477
478 vmw_fifo_commit(dev_priv, submit_size);
479 (void) vmw_3d_resource_inc(dev_priv);
480 vmw_resource_activate(res, vmw_hw_surface_destroy);
481 return 0;
482}
483
484static void vmw_user_surface_free(struct vmw_resource *res)
485{
486 struct vmw_surface *srf = container_of(res, struct vmw_surface, res);
487 struct vmw_user_surface *user_srf =
488 container_of(srf, struct vmw_user_surface, srf);
489
490 kfree(srf->sizes);
491 kfree(srf->snooper.image);
492 kfree(user_srf);
493}
494
495int vmw_user_surface_lookup_handle(struct vmw_private *dev_priv,
496 struct ttm_object_file *tfile,
497 uint32_t handle, struct vmw_surface **out)
498{
499 struct vmw_resource *res;
500 struct vmw_surface *srf;
501 struct vmw_user_surface *user_srf;
502 struct ttm_base_object *base;
503 int ret = -EINVAL;
504
505 base = ttm_base_object_lookup(tfile, handle);
506 if (unlikely(base == NULL))
507 return -EINVAL;
508
509 if (unlikely(base->object_type != VMW_RES_SURFACE))
510 goto out_bad_resource;
511
512 user_srf = container_of(base, struct vmw_user_surface, base);
513 srf = &user_srf->srf;
514 res = &srf->res;
515
516 read_lock(&dev_priv->resource_lock);
517
518 if (!res->avail || res->res_free != &vmw_user_surface_free) {
519 read_unlock(&dev_priv->resource_lock);
520 goto out_bad_resource;
521 }
522
523 kref_get(&res->kref);
524 read_unlock(&dev_priv->resource_lock);
525
526 *out = srf;
527 ret = 0;
528
529out_bad_resource:
530 ttm_base_object_unref(&base);
531
532 return ret;
533}
534
535static void vmw_user_surface_base_release(struct ttm_base_object **p_base)
536{
537 struct ttm_base_object *base = *p_base;
538 struct vmw_user_surface *user_srf =
539 container_of(base, struct vmw_user_surface, base);
540 struct vmw_resource *res = &user_srf->srf.res;
541
542 *p_base = NULL;
543 vmw_resource_unreference(&res);
544}
545
546int vmw_surface_destroy_ioctl(struct drm_device *dev, void *data,
547 struct drm_file *file_priv)
548{
549 struct drm_vmw_surface_arg *arg = (struct drm_vmw_surface_arg *)data;
550 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
551
552 return ttm_ref_object_base_unref(tfile, arg->sid, TTM_REF_USAGE);
553}
554
555int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
556 struct drm_file *file_priv)
557{
558 struct vmw_private *dev_priv = vmw_priv(dev);
559 struct vmw_user_surface *user_srf =
560 kmalloc(sizeof(*user_srf), GFP_KERNEL);
561 struct vmw_surface *srf;
562 struct vmw_resource *res;
563 struct vmw_resource *tmp;
564 union drm_vmw_surface_create_arg *arg =
565 (union drm_vmw_surface_create_arg *)data;
566 struct drm_vmw_surface_create_req *req = &arg->req;
567 struct drm_vmw_surface_arg *rep = &arg->rep;
568 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
569 struct drm_vmw_size __user *user_sizes;
570 int ret;
571 int i;
572
573 if (unlikely(user_srf == NULL))
574 return -ENOMEM;
575
576 srf = &user_srf->srf;
577 res = &srf->res;
578
579 srf->flags = req->flags;
580 srf->format = req->format;
581 srf->scanout = req->scanout;
582 memcpy(srf->mip_levels, req->mip_levels, sizeof(srf->mip_levels));
583 srf->num_sizes = 0;
584 for (i = 0; i < DRM_VMW_MAX_SURFACE_FACES; ++i)
585 srf->num_sizes += srf->mip_levels[i];
586
587 if (srf->num_sizes > DRM_VMW_MAX_SURFACE_FACES *
588 DRM_VMW_MAX_MIP_LEVELS) {
589 ret = -EINVAL;
590 goto out_err0;
591 }
592
593 srf->sizes = kmalloc(srf->num_sizes * sizeof(*srf->sizes), GFP_KERNEL);
594 if (unlikely(srf->sizes == NULL)) {
595 ret = -ENOMEM;
596 goto out_err0;
597 }
598
599 user_sizes = (struct drm_vmw_size __user *)(unsigned long)
600 req->size_addr;
601
602 ret = copy_from_user(srf->sizes, user_sizes,
603 srf->num_sizes * sizeof(*srf->sizes));
604 if (unlikely(ret != 0)) {
605 ret = -EFAULT;
606 goto out_err1;
607 }
608
609 if (srf->scanout &&
610 srf->num_sizes == 1 &&
611 srf->sizes[0].width == 64 &&
612 srf->sizes[0].height == 64 &&
613 srf->format == SVGA3D_A8R8G8B8) {
614
615 /* allocate image area and clear it */
616 srf->snooper.image = kzalloc(64 * 64 * 4, GFP_KERNEL);
617 if (!srf->snooper.image) {
618 DRM_ERROR("Failed to allocate cursor_image\n");
619 ret = -ENOMEM;
620 goto out_err1;
621 }
622 } else {
623 srf->snooper.image = NULL;
624 }
625 srf->snooper.crtc = NULL;
626
627 user_srf->base.shareable = false;
628 user_srf->base.tfile = NULL;
629
630 /**
631 * From this point, the generic resource management functions
632 * destroy the object on failure.
633 */
634
635 ret = vmw_surface_init(dev_priv, srf, vmw_user_surface_free);
636 if (unlikely(ret != 0))
637 return ret;
638
639 tmp = vmw_resource_reference(&srf->res);
640 ret = ttm_base_object_init(tfile, &user_srf->base,
641 req->shareable, VMW_RES_SURFACE,
642 &vmw_user_surface_base_release, NULL);
643
644 if (unlikely(ret != 0)) {
645 vmw_resource_unreference(&tmp);
646 vmw_resource_unreference(&res);
647 return ret;
648 }
649
650 rep->sid = user_srf->base.hash.key;
651 if (rep->sid == SVGA3D_INVALID_ID)
652 DRM_ERROR("Created bad Surface ID.\n");
653
654 vmw_resource_unreference(&res);
655 return 0;
656out_err1:
657 kfree(srf->sizes);
658out_err0:
659 kfree(user_srf);
660 return ret;
661}
662
663int vmw_surface_reference_ioctl(struct drm_device *dev, void *data,
664 struct drm_file *file_priv)
665{
666 union drm_vmw_surface_reference_arg *arg =
667 (union drm_vmw_surface_reference_arg *)data;
668 struct drm_vmw_surface_arg *req = &arg->req;
669 struct drm_vmw_surface_create_req *rep = &arg->rep;
670 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
671 struct vmw_surface *srf;
672 struct vmw_user_surface *user_srf;
673 struct drm_vmw_size __user *user_sizes;
674 struct ttm_base_object *base;
675 int ret = -EINVAL;
676
677 base = ttm_base_object_lookup(tfile, req->sid);
678 if (unlikely(base == NULL)) {
679 DRM_ERROR("Could not find surface to reference.\n");
680 return -EINVAL;
681 }
682
683 if (unlikely(base->object_type != VMW_RES_SURFACE))
684 goto out_bad_resource;
685
686 user_srf = container_of(base, struct vmw_user_surface, base);
687 srf = &user_srf->srf;
688
689 ret = ttm_ref_object_add(tfile, &user_srf->base, TTM_REF_USAGE, NULL);
690 if (unlikely(ret != 0)) {
691 DRM_ERROR("Could not add a reference to a surface.\n");
692 goto out_no_reference;
693 }
694
695 rep->flags = srf->flags;
696 rep->format = srf->format;
697 memcpy(rep->mip_levels, srf->mip_levels, sizeof(srf->mip_levels));
698 user_sizes = (struct drm_vmw_size __user *)(unsigned long)
699 rep->size_addr;
700
701 if (user_sizes)
702 ret = copy_to_user(user_sizes, srf->sizes,
703 srf->num_sizes * sizeof(*srf->sizes));
704 if (unlikely(ret != 0)) {
705 DRM_ERROR("copy_to_user failed %p %u\n",
706 user_sizes, srf->num_sizes);
707 ret = -EFAULT;
708 }
709out_bad_resource:
710out_no_reference:
711 ttm_base_object_unref(&base);
712
713 return ret;
714}
715
716int vmw_surface_check(struct vmw_private *dev_priv,
717 struct ttm_object_file *tfile,
718 uint32_t handle, int *id)
719{
720 struct ttm_base_object *base;
721 struct vmw_user_surface *user_srf;
722
723 int ret = -EPERM;
724
725 base = ttm_base_object_lookup(tfile, handle);
726 if (unlikely(base == NULL))
727 return -EINVAL;
728
729 if (unlikely(base->object_type != VMW_RES_SURFACE))
730 goto out_bad_surface;
731
732 user_srf = container_of(base, struct vmw_user_surface, base);
733 *id = user_srf->srf.res.id;
734 ret = 0;
735
736out_bad_surface:
737 /**
738 * FIXME: May deadlock here when called from the
739 * command parsing code.
740 */
741
742 ttm_base_object_unref(&base);
743 return ret;
744}
745
746/**
747 * Buffer management.
748 */
749
750static size_t vmw_dmabuf_acc_size(struct ttm_bo_global *glob,
751 unsigned long num_pages)
752{
753 static size_t bo_user_size = ~0;
754
755 size_t page_array_size =
756 (num_pages * sizeof(void *) + PAGE_SIZE - 1) & PAGE_MASK;
757
758 if (unlikely(bo_user_size == ~0)) {
759 bo_user_size = glob->ttm_bo_extra_size +
760 ttm_round_pot(sizeof(struct vmw_dma_buffer));
761 }
762
763 return bo_user_size + page_array_size;
764}
765
766void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo)
767{
768 struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
769 struct ttm_bo_global *glob = bo->glob;
770
771 ttm_mem_global_free(glob->mem_glob, bo->acc_size);
772 kfree(vmw_bo);
773}
774
775int vmw_dmabuf_init(struct vmw_private *dev_priv,
776 struct vmw_dma_buffer *vmw_bo,
777 size_t size, struct ttm_placement *placement,
778 bool interruptible,
779 void (*bo_free) (struct ttm_buffer_object *bo))
780{
781 struct ttm_bo_device *bdev = &dev_priv->bdev;
782 struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
783 size_t acc_size;
784 int ret;
785
786 BUG_ON(!bo_free);
787
788 acc_size =
789 vmw_dmabuf_acc_size(bdev->glob,
790 (size + PAGE_SIZE - 1) >> PAGE_SHIFT);
791
792 ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
793 if (unlikely(ret != 0)) {
794 /* we must free the bo here as
795 * ttm_buffer_object_init does so as well */
796 bo_free(&vmw_bo->base);
797 return ret;
798 }
799
800 memset(vmw_bo, 0, sizeof(*vmw_bo));
801
802 INIT_LIST_HEAD(&vmw_bo->validate_list);
803
804 ret = ttm_bo_init(bdev, &vmw_bo->base, size,
805 ttm_bo_type_device, placement,
806 0, 0, interruptible,
807 NULL, acc_size, bo_free);
808 return ret;
809}
810
811static void vmw_user_dmabuf_destroy(struct ttm_buffer_object *bo)
812{
813 struct vmw_user_dma_buffer *vmw_user_bo = vmw_user_dma_buffer(bo);
814 struct ttm_bo_global *glob = bo->glob;
815
816 ttm_mem_global_free(glob->mem_glob, bo->acc_size);
817 kfree(vmw_user_bo);
818}
819
820static void vmw_user_dmabuf_release(struct ttm_base_object **p_base)
821{
822 struct vmw_user_dma_buffer *vmw_user_bo;
823 struct ttm_base_object *base = *p_base;
824 struct ttm_buffer_object *bo;
825
826 *p_base = NULL;
827
828 if (unlikely(base == NULL))
829 return;
830
831 vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base);
832 bo = &vmw_user_bo->dma.base;
833 ttm_bo_unref(&bo);
834}
835
836int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data,
837 struct drm_file *file_priv)
838{
839 struct vmw_private *dev_priv = vmw_priv(dev);
840 union drm_vmw_alloc_dmabuf_arg *arg =
841 (union drm_vmw_alloc_dmabuf_arg *)data;
842 struct drm_vmw_alloc_dmabuf_req *req = &arg->req;
843 struct drm_vmw_dmabuf_rep *rep = &arg->rep;
844 struct vmw_user_dma_buffer *vmw_user_bo;
845 struct ttm_buffer_object *tmp;
846 struct vmw_master *vmaster = vmw_master(file_priv->master);
847 int ret;
848
849 vmw_user_bo = kzalloc(sizeof(*vmw_user_bo), GFP_KERNEL);
850 if (unlikely(vmw_user_bo == NULL))
851 return -ENOMEM;
852
853 ret = ttm_read_lock(&vmaster->lock, true);
854 if (unlikely(ret != 0)) {
855 kfree(vmw_user_bo);
856 return ret;
857 }
858
859 ret = vmw_dmabuf_init(dev_priv, &vmw_user_bo->dma, req->size,
860 &vmw_vram_sys_placement, true,
861 &vmw_user_dmabuf_destroy);
862 if (unlikely(ret != 0))
863 goto out_no_dmabuf;
864
865 tmp = ttm_bo_reference(&vmw_user_bo->dma.base);
866 ret = ttm_base_object_init(vmw_fpriv(file_priv)->tfile,
867 &vmw_user_bo->base,
868 false,
869 ttm_buffer_type,
870 &vmw_user_dmabuf_release, NULL);
871 if (unlikely(ret != 0))
872 goto out_no_base_object;
873 else {
874 rep->handle = vmw_user_bo->base.hash.key;
875 rep->map_handle = vmw_user_bo->dma.base.addr_space_offset;
876 rep->cur_gmr_id = vmw_user_bo->base.hash.key;
877 rep->cur_gmr_offset = 0;
878 }
879
880out_no_base_object:
881 ttm_bo_unref(&tmp);
882out_no_dmabuf:
883 ttm_read_unlock(&vmaster->lock);
884
885 return ret;
886}
887
888int vmw_dmabuf_unref_ioctl(struct drm_device *dev, void *data,
889 struct drm_file *file_priv)
890{
891 struct drm_vmw_unref_dmabuf_arg *arg =
892 (struct drm_vmw_unref_dmabuf_arg *)data;
893
894 return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
895 arg->handle,
896 TTM_REF_USAGE);
897}
898
899uint32_t vmw_dmabuf_validate_node(struct ttm_buffer_object *bo,
900 uint32_t cur_validate_node)
901{
902 struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
903
904 if (likely(vmw_bo->on_validate_list))
905 return vmw_bo->cur_validate_node;
906
907 vmw_bo->cur_validate_node = cur_validate_node;
908 vmw_bo->on_validate_list = true;
909
910 return cur_validate_node;
911}
912
913void vmw_dmabuf_validate_clear(struct ttm_buffer_object *bo)
914{
915 struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
916
917 vmw_bo->on_validate_list = false;
918}
919
920int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile,
921 uint32_t handle, struct vmw_dma_buffer **out)
922{
923 struct vmw_user_dma_buffer *vmw_user_bo;
924 struct ttm_base_object *base;
925
926 base = ttm_base_object_lookup(tfile, handle);
927 if (unlikely(base == NULL)) {
928 printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n",
929 (unsigned long)handle);
930 return -ESRCH;
931 }
932
933 if (unlikely(base->object_type != ttm_buffer_type)) {
934 ttm_base_object_unref(&base);
935 printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n",
936 (unsigned long)handle);
937 return -EINVAL;
938 }
939
940 vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base);
941 (void)ttm_bo_reference(&vmw_user_bo->dma.base);
942 ttm_base_object_unref(&base);
943 *out = &vmw_user_bo->dma;
944
945 return 0;
946}
947
948/*
949 * Stream management
950 */
951
952static void vmw_stream_destroy(struct vmw_resource *res)
953{
954 struct vmw_private *dev_priv = res->dev_priv;
955 struct vmw_stream *stream;
956 int ret;
957
958 DRM_INFO("%s: unref\n", __func__);
959 stream = container_of(res, struct vmw_stream, res);
960
961 ret = vmw_overlay_unref(dev_priv, stream->stream_id);
962 WARN_ON(ret != 0);
963}
964
965static int vmw_stream_init(struct vmw_private *dev_priv,
966 struct vmw_stream *stream,
967 void (*res_free) (struct vmw_resource *res))
968{
969 struct vmw_resource *res = &stream->res;
970 int ret;
971
972 ret = vmw_resource_init(dev_priv, res, &dev_priv->stream_idr,
973 VMW_RES_STREAM, res_free);
974
975 if (unlikely(ret != 0)) {
976 if (res_free == NULL)
977 kfree(stream);
978 else
979 res_free(&stream->res);
980 return ret;
981 }
982
983 ret = vmw_overlay_claim(dev_priv, &stream->stream_id);
984 if (ret) {
985 vmw_resource_unreference(&res);
986 return ret;
987 }
988
989 DRM_INFO("%s: claimed\n", __func__);
990
991 vmw_resource_activate(&stream->res, vmw_stream_destroy);
992 return 0;
993}
994
995/**
996 * User-space context management:
997 */
998
999static void vmw_user_stream_free(struct vmw_resource *res)
1000{
1001 struct vmw_user_stream *stream =
1002 container_of(res, struct vmw_user_stream, stream.res);
1003
1004 kfree(stream);
1005}
1006
1007/**
1008 * This function is called when user space has no more references on the
1009 * base object. It releases the base-object's reference on the resource object.
1010 */
1011
1012static void vmw_user_stream_base_release(struct ttm_base_object **p_base)
1013{
1014 struct ttm_base_object *base = *p_base;
1015 struct vmw_user_stream *stream =
1016 container_of(base, struct vmw_user_stream, base);
1017 struct vmw_resource *res = &stream->stream.res;
1018
1019 *p_base = NULL;
1020 vmw_resource_unreference(&res);
1021}
1022
1023int vmw_stream_unref_ioctl(struct drm_device *dev, void *data,
1024 struct drm_file *file_priv)
1025{
1026 struct vmw_private *dev_priv = vmw_priv(dev);
1027 struct vmw_resource *res;
1028 struct vmw_user_stream *stream;
1029 struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
1030 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
1031 int ret = 0;
1032
1033 res = vmw_resource_lookup(dev_priv, &dev_priv->stream_idr, arg->stream_id);
1034 if (unlikely(res == NULL))
1035 return -EINVAL;
1036
1037 if (res->res_free != &vmw_user_stream_free) {
1038 ret = -EINVAL;
1039 goto out;
1040 }
1041
1042 stream = container_of(res, struct vmw_user_stream, stream.res);
1043 if (stream->base.tfile != tfile) {
1044 ret = -EINVAL;
1045 goto out;
1046 }
1047
1048 ttm_ref_object_base_unref(tfile, stream->base.hash.key, TTM_REF_USAGE);
1049out:
1050 vmw_resource_unreference(&res);
1051 return ret;
1052}
1053
1054int vmw_stream_claim_ioctl(struct drm_device *dev, void *data,
1055 struct drm_file *file_priv)
1056{
1057 struct vmw_private *dev_priv = vmw_priv(dev);
1058 struct vmw_user_stream *stream = kmalloc(sizeof(*stream), GFP_KERNEL);
1059 struct vmw_resource *res;
1060 struct vmw_resource *tmp;
1061 struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
1062 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
1063 int ret;
1064
1065 if (unlikely(stream == NULL))
1066 return -ENOMEM;
1067
1068 res = &stream->stream.res;
1069 stream->base.shareable = false;
1070 stream->base.tfile = NULL;
1071
1072 ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free);
1073 if (unlikely(ret != 0))
1074 return ret;
1075
1076 tmp = vmw_resource_reference(res);
1077 ret = ttm_base_object_init(tfile, &stream->base, false, VMW_RES_STREAM,
1078 &vmw_user_stream_base_release, NULL);
1079
1080 if (unlikely(ret != 0)) {
1081 vmw_resource_unreference(&tmp);
1082 goto out_err;
1083 }
1084
1085 arg->stream_id = res->id;
1086out_err:
1087 vmw_resource_unreference(&res);
1088 return ret;
1089}
1090
1091int vmw_user_stream_lookup(struct vmw_private *dev_priv,
1092 struct ttm_object_file *tfile,
1093 uint32_t *inout_id, struct vmw_resource **out)
1094{
1095 struct vmw_user_stream *stream;
1096 struct vmw_resource *res;
1097 int ret;
1098
1099 res = vmw_resource_lookup(dev_priv, &dev_priv->stream_idr, *inout_id);
1100 if (unlikely(res == NULL))
1101 return -EINVAL;
1102
1103 if (res->res_free != &vmw_user_stream_free) {
1104 ret = -EINVAL;
1105 goto err_ref;
1106 }
1107
1108 stream = container_of(res, struct vmw_user_stream, stream.res);
1109 if (stream->base.tfile != tfile) {
1110 ret = -EPERM;
1111 goto err_ref;
1112 }
1113
1114 *inout_id = stream->stream.stream_id;
1115 *out = res;
1116 return 0;
1117err_ref:
1118 vmw_resource_unreference(&res);
1119 return ret;
1120}
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_resource_priv.h"
31#include "vmwgfx_binding.h"
32#include "vmwgfx_drv.h"
33
34#define VMW_RES_EVICT_ERR_COUNT 10
35
36/**
37 * vmw_resource_mob_attach - Mark a resource as attached to its backing mob
38 * @res: The resource
39 */
40void vmw_resource_mob_attach(struct vmw_resource *res)
41{
42 struct vmw_buffer_object *backup = res->backup;
43 struct rb_node **new = &backup->res_tree.rb_node, *parent = NULL;
44
45 dma_resv_assert_held(res->backup->base.base.resv);
46 res->used_prio = (res->res_dirty) ? res->func->dirty_prio :
47 res->func->prio;
48
49 while (*new) {
50 struct vmw_resource *this =
51 container_of(*new, struct vmw_resource, mob_node);
52
53 parent = *new;
54 new = (res->backup_offset < this->backup_offset) ?
55 &((*new)->rb_left) : &((*new)->rb_right);
56 }
57
58 rb_link_node(&res->mob_node, parent, new);
59 rb_insert_color(&res->mob_node, &backup->res_tree);
60
61 vmw_bo_prio_add(backup, res->used_prio);
62}
63
64/**
65 * vmw_resource_mob_detach - Mark a resource as detached from its backing mob
66 * @res: The resource
67 */
68void vmw_resource_mob_detach(struct vmw_resource *res)
69{
70 struct vmw_buffer_object *backup = res->backup;
71
72 dma_resv_assert_held(backup->base.base.resv);
73 if (vmw_resource_mob_attached(res)) {
74 rb_erase(&res->mob_node, &backup->res_tree);
75 RB_CLEAR_NODE(&res->mob_node);
76 vmw_bo_prio_del(backup, res->used_prio);
77 }
78}
79
80struct vmw_resource *vmw_resource_reference(struct vmw_resource *res)
81{
82 kref_get(&res->kref);
83 return res;
84}
85
86struct vmw_resource *
87vmw_resource_reference_unless_doomed(struct vmw_resource *res)
88{
89 return kref_get_unless_zero(&res->kref) ? res : NULL;
90}
91
92/**
93 * vmw_resource_release_id - release a resource id to the id manager.
94 *
95 * @res: Pointer to the resource.
96 *
97 * Release the resource id to the resource id manager and set it to -1
98 */
99void vmw_resource_release_id(struct vmw_resource *res)
100{
101 struct vmw_private *dev_priv = res->dev_priv;
102 struct idr *idr = &dev_priv->res_idr[res->func->res_type];
103
104 spin_lock(&dev_priv->resource_lock);
105 if (res->id != -1)
106 idr_remove(idr, res->id);
107 res->id = -1;
108 spin_unlock(&dev_priv->resource_lock);
109}
110
111static void vmw_resource_release(struct kref *kref)
112{
113 struct vmw_resource *res =
114 container_of(kref, struct vmw_resource, kref);
115 struct vmw_private *dev_priv = res->dev_priv;
116 int id;
117 struct idr *idr = &dev_priv->res_idr[res->func->res_type];
118
119 spin_lock(&dev_priv->resource_lock);
120 list_del_init(&res->lru_head);
121 spin_unlock(&dev_priv->resource_lock);
122 if (res->backup) {
123 struct ttm_buffer_object *bo = &res->backup->base;
124
125 ttm_bo_reserve(bo, false, false, NULL);
126 if (vmw_resource_mob_attached(res) &&
127 res->func->unbind != NULL) {
128 struct ttm_validate_buffer val_buf;
129
130 val_buf.bo = bo;
131 val_buf.num_shared = 0;
132 res->func->unbind(res, false, &val_buf);
133 }
134 res->backup_dirty = false;
135 vmw_resource_mob_detach(res);
136 if (res->dirty)
137 res->func->dirty_free(res);
138 if (res->coherent)
139 vmw_bo_dirty_release(res->backup);
140 ttm_bo_unreserve(bo);
141 vmw_bo_unreference(&res->backup);
142 }
143
144 if (likely(res->hw_destroy != NULL)) {
145 mutex_lock(&dev_priv->binding_mutex);
146 vmw_binding_res_list_kill(&res->binding_head);
147 mutex_unlock(&dev_priv->binding_mutex);
148 res->hw_destroy(res);
149 }
150
151 id = res->id;
152 if (res->res_free != NULL)
153 res->res_free(res);
154 else
155 kfree(res);
156
157 spin_lock(&dev_priv->resource_lock);
158 if (id != -1)
159 idr_remove(idr, id);
160 spin_unlock(&dev_priv->resource_lock);
161}
162
163void vmw_resource_unreference(struct vmw_resource **p_res)
164{
165 struct vmw_resource *res = *p_res;
166
167 *p_res = NULL;
168 kref_put(&res->kref, vmw_resource_release);
169}
170
171
172/**
173 * vmw_resource_alloc_id - release a resource id to the id manager.
174 *
175 * @res: Pointer to the resource.
176 *
177 * Allocate the lowest free resource from the resource manager, and set
178 * @res->id to that id. Returns 0 on success and -ENOMEM on failure.
179 */
180int vmw_resource_alloc_id(struct vmw_resource *res)
181{
182 struct vmw_private *dev_priv = res->dev_priv;
183 int ret;
184 struct idr *idr = &dev_priv->res_idr[res->func->res_type];
185
186 BUG_ON(res->id != -1);
187
188 idr_preload(GFP_KERNEL);
189 spin_lock(&dev_priv->resource_lock);
190
191 ret = idr_alloc(idr, res, 1, 0, GFP_NOWAIT);
192 if (ret >= 0)
193 res->id = ret;
194
195 spin_unlock(&dev_priv->resource_lock);
196 idr_preload_end();
197 return ret < 0 ? ret : 0;
198}
199
200/**
201 * vmw_resource_init - initialize a struct vmw_resource
202 *
203 * @dev_priv: Pointer to a device private struct.
204 * @res: The struct vmw_resource to initialize.
205 * @obj_type: Resource object type.
206 * @delay_id: Boolean whether to defer device id allocation until
207 * the first validation.
208 * @res_free: Resource destructor.
209 * @func: Resource function table.
210 */
211int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res,
212 bool delay_id,
213 void (*res_free) (struct vmw_resource *res),
214 const struct vmw_res_func *func)
215{
216 kref_init(&res->kref);
217 res->hw_destroy = NULL;
218 res->res_free = res_free;
219 res->dev_priv = dev_priv;
220 res->func = func;
221 RB_CLEAR_NODE(&res->mob_node);
222 INIT_LIST_HEAD(&res->lru_head);
223 INIT_LIST_HEAD(&res->binding_head);
224 res->id = -1;
225 res->backup = NULL;
226 res->backup_offset = 0;
227 res->backup_dirty = false;
228 res->res_dirty = false;
229 res->coherent = false;
230 res->used_prio = 3;
231 res->dirty = NULL;
232 if (delay_id)
233 return 0;
234 else
235 return vmw_resource_alloc_id(res);
236}
237
238
239/**
240 * vmw_user_resource_lookup_handle - lookup a struct resource from a
241 * TTM user-space handle and perform basic type checks
242 *
243 * @dev_priv: Pointer to a device private struct
244 * @tfile: Pointer to a struct ttm_object_file identifying the caller
245 * @handle: The TTM user-space handle
246 * @converter: Pointer to an object describing the resource type
247 * @p_res: On successful return the location pointed to will contain
248 * a pointer to a refcounted struct vmw_resource.
249 *
250 * If the handle can't be found or is associated with an incorrect resource
251 * type, -EINVAL will be returned.
252 */
253int vmw_user_resource_lookup_handle(struct vmw_private *dev_priv,
254 struct ttm_object_file *tfile,
255 uint32_t handle,
256 const struct vmw_user_resource_conv
257 *converter,
258 struct vmw_resource **p_res)
259{
260 struct ttm_base_object *base;
261 struct vmw_resource *res;
262 int ret = -EINVAL;
263
264 base = ttm_base_object_lookup(tfile, handle);
265 if (unlikely(base == NULL))
266 return -EINVAL;
267
268 if (unlikely(ttm_base_object_type(base) != converter->object_type))
269 goto out_bad_resource;
270
271 res = converter->base_obj_to_res(base);
272 kref_get(&res->kref);
273
274 *p_res = res;
275 ret = 0;
276
277out_bad_resource:
278 ttm_base_object_unref(&base);
279
280 return ret;
281}
282
283/**
284 * vmw_user_resource_lookup_handle - lookup a struct resource from a
285 * TTM user-space handle and perform basic type checks
286 *
287 * @dev_priv: Pointer to a device private struct
288 * @tfile: Pointer to a struct ttm_object_file identifying the caller
289 * @handle: The TTM user-space handle
290 * @converter: Pointer to an object describing the resource type
291 * @p_res: On successful return the location pointed to will contain
292 * a pointer to a refcounted struct vmw_resource.
293 *
294 * If the handle can't be found or is associated with an incorrect resource
295 * type, -EINVAL will be returned.
296 */
297struct vmw_resource *
298vmw_user_resource_noref_lookup_handle(struct vmw_private *dev_priv,
299 struct ttm_object_file *tfile,
300 uint32_t handle,
301 const struct vmw_user_resource_conv
302 *converter)
303{
304 struct ttm_base_object *base;
305
306 base = ttm_base_object_noref_lookup(tfile, handle);
307 if (!base)
308 return ERR_PTR(-ESRCH);
309
310 if (unlikely(ttm_base_object_type(base) != converter->object_type)) {
311 ttm_base_object_noref_release();
312 return ERR_PTR(-EINVAL);
313 }
314
315 return converter->base_obj_to_res(base);
316}
317
318/**
319 * Helper function that looks either a surface or bo.
320 *
321 * The pointer this pointed at by out_surf and out_buf needs to be null.
322 */
323int vmw_user_lookup_handle(struct vmw_private *dev_priv,
324 struct ttm_object_file *tfile,
325 uint32_t handle,
326 struct vmw_surface **out_surf,
327 struct vmw_buffer_object **out_buf)
328{
329 struct vmw_resource *res;
330 int ret;
331
332 BUG_ON(*out_surf || *out_buf);
333
334 ret = vmw_user_resource_lookup_handle(dev_priv, tfile, handle,
335 user_surface_converter,
336 &res);
337 if (!ret) {
338 *out_surf = vmw_res_to_srf(res);
339 return 0;
340 }
341
342 *out_surf = NULL;
343 ret = vmw_user_bo_lookup(tfile, handle, out_buf, NULL);
344 return ret;
345}
346
347/**
348 * vmw_resource_buf_alloc - Allocate a backup buffer for a resource.
349 *
350 * @res: The resource for which to allocate a backup buffer.
351 * @interruptible: Whether any sleeps during allocation should be
352 * performed while interruptible.
353 */
354static int vmw_resource_buf_alloc(struct vmw_resource *res,
355 bool interruptible)
356{
357 unsigned long size =
358 (res->backup_size + PAGE_SIZE - 1) & PAGE_MASK;
359 struct vmw_buffer_object *backup;
360 int ret;
361
362 if (likely(res->backup)) {
363 BUG_ON(res->backup->base.num_pages * PAGE_SIZE < size);
364 return 0;
365 }
366
367 backup = kzalloc(sizeof(*backup), GFP_KERNEL);
368 if (unlikely(!backup))
369 return -ENOMEM;
370
371 ret = vmw_bo_init(res->dev_priv, backup, res->backup_size,
372 res->func->backup_placement,
373 interruptible,
374 &vmw_bo_bo_free);
375 if (unlikely(ret != 0))
376 goto out_no_bo;
377
378 res->backup = backup;
379
380out_no_bo:
381 return ret;
382}
383
384/**
385 * vmw_resource_do_validate - Make a resource up-to-date and visible
386 * to the device.
387 *
388 * @res: The resource to make visible to the device.
389 * @val_buf: Information about a buffer possibly
390 * containing backup data if a bind operation is needed.
391 *
392 * On hardware resource shortage, this function returns -EBUSY and
393 * should be retried once resources have been freed up.
394 */
395static int vmw_resource_do_validate(struct vmw_resource *res,
396 struct ttm_validate_buffer *val_buf,
397 bool dirtying)
398{
399 int ret = 0;
400 const struct vmw_res_func *func = res->func;
401
402 if (unlikely(res->id == -1)) {
403 ret = func->create(res);
404 if (unlikely(ret != 0))
405 return ret;
406 }
407
408 if (func->bind &&
409 ((func->needs_backup && !vmw_resource_mob_attached(res) &&
410 val_buf->bo != NULL) ||
411 (!func->needs_backup && val_buf->bo != NULL))) {
412 ret = func->bind(res, val_buf);
413 if (unlikely(ret != 0))
414 goto out_bind_failed;
415 if (func->needs_backup)
416 vmw_resource_mob_attach(res);
417 }
418
419 /*
420 * Handle the case where the backup mob is marked coherent but
421 * the resource isn't.
422 */
423 if (func->dirty_alloc && vmw_resource_mob_attached(res) &&
424 !res->coherent) {
425 if (res->backup->dirty && !res->dirty) {
426 ret = func->dirty_alloc(res);
427 if (ret)
428 return ret;
429 } else if (!res->backup->dirty && res->dirty) {
430 func->dirty_free(res);
431 }
432 }
433
434 /*
435 * Transfer the dirty regions to the resource and update
436 * the resource.
437 */
438 if (res->dirty) {
439 if (dirtying && !res->res_dirty) {
440 pgoff_t start = res->backup_offset >> PAGE_SHIFT;
441 pgoff_t end = __KERNEL_DIV_ROUND_UP
442 (res->backup_offset + res->backup_size,
443 PAGE_SIZE);
444
445 vmw_bo_dirty_unmap(res->backup, start, end);
446 }
447
448 vmw_bo_dirty_transfer_to_res(res);
449 return func->dirty_sync(res);
450 }
451
452 return 0;
453
454out_bind_failed:
455 func->destroy(res);
456
457 return ret;
458}
459
460/**
461 * vmw_resource_unreserve - Unreserve a resource previously reserved for
462 * command submission.
463 *
464 * @res: Pointer to the struct vmw_resource to unreserve.
465 * @dirty_set: Change dirty status of the resource.
466 * @dirty: When changing dirty status indicates the new status.
467 * @switch_backup: Backup buffer has been switched.
468 * @new_backup: Pointer to new backup buffer if command submission
469 * switched. May be NULL.
470 * @new_backup_offset: New backup offset if @switch_backup is true.
471 *
472 * Currently unreserving a resource means putting it back on the device's
473 * resource lru list, so that it can be evicted if necessary.
474 */
475void vmw_resource_unreserve(struct vmw_resource *res,
476 bool dirty_set,
477 bool dirty,
478 bool switch_backup,
479 struct vmw_buffer_object *new_backup,
480 unsigned long new_backup_offset)
481{
482 struct vmw_private *dev_priv = res->dev_priv;
483
484 if (!list_empty(&res->lru_head))
485 return;
486
487 if (switch_backup && new_backup != res->backup) {
488 if (res->backup) {
489 vmw_resource_mob_detach(res);
490 if (res->coherent)
491 vmw_bo_dirty_release(res->backup);
492 vmw_bo_unreference(&res->backup);
493 }
494
495 if (new_backup) {
496 res->backup = vmw_bo_reference(new_backup);
497
498 /*
499 * The validation code should already have added a
500 * dirty tracker here.
501 */
502 WARN_ON(res->coherent && !new_backup->dirty);
503
504 vmw_resource_mob_attach(res);
505 } else {
506 res->backup = NULL;
507 }
508 } else if (switch_backup && res->coherent) {
509 vmw_bo_dirty_release(res->backup);
510 }
511
512 if (switch_backup)
513 res->backup_offset = new_backup_offset;
514
515 if (dirty_set)
516 res->res_dirty = dirty;
517
518 if (!res->func->may_evict || res->id == -1 || res->pin_count)
519 return;
520
521 spin_lock(&dev_priv->resource_lock);
522 list_add_tail(&res->lru_head,
523 &res->dev_priv->res_lru[res->func->res_type]);
524 spin_unlock(&dev_priv->resource_lock);
525}
526
527/**
528 * vmw_resource_check_buffer - Check whether a backup buffer is needed
529 * for a resource and in that case, allocate
530 * one, reserve and validate it.
531 *
532 * @ticket: The ww aqcquire context to use, or NULL if trylocking.
533 * @res: The resource for which to allocate a backup buffer.
534 * @interruptible: Whether any sleeps during allocation should be
535 * performed while interruptible.
536 * @val_buf: On successful return contains data about the
537 * reserved and validated backup buffer.
538 */
539static int
540vmw_resource_check_buffer(struct ww_acquire_ctx *ticket,
541 struct vmw_resource *res,
542 bool interruptible,
543 struct ttm_validate_buffer *val_buf)
544{
545 struct ttm_operation_ctx ctx = { true, false };
546 struct list_head val_list;
547 bool backup_dirty = false;
548 int ret;
549
550 if (unlikely(res->backup == NULL)) {
551 ret = vmw_resource_buf_alloc(res, interruptible);
552 if (unlikely(ret != 0))
553 return ret;
554 }
555
556 INIT_LIST_HEAD(&val_list);
557 ttm_bo_get(&res->backup->base);
558 val_buf->bo = &res->backup->base;
559 val_buf->num_shared = 0;
560 list_add_tail(&val_buf->head, &val_list);
561 ret = ttm_eu_reserve_buffers(ticket, &val_list, interruptible, NULL);
562 if (unlikely(ret != 0))
563 goto out_no_reserve;
564
565 if (res->func->needs_backup && !vmw_resource_mob_attached(res))
566 return 0;
567
568 backup_dirty = res->backup_dirty;
569 ret = ttm_bo_validate(&res->backup->base,
570 res->func->backup_placement,
571 &ctx);
572
573 if (unlikely(ret != 0))
574 goto out_no_validate;
575
576 return 0;
577
578out_no_validate:
579 ttm_eu_backoff_reservation(ticket, &val_list);
580out_no_reserve:
581 ttm_bo_put(val_buf->bo);
582 val_buf->bo = NULL;
583 if (backup_dirty)
584 vmw_bo_unreference(&res->backup);
585
586 return ret;
587}
588
589/**
590 * vmw_resource_reserve - Reserve a resource for command submission
591 *
592 * @res: The resource to reserve.
593 *
594 * This function takes the resource off the LRU list and make sure
595 * a backup buffer is present for guest-backed resources. However,
596 * the buffer may not be bound to the resource at this point.
597 *
598 */
599int vmw_resource_reserve(struct vmw_resource *res, bool interruptible,
600 bool no_backup)
601{
602 struct vmw_private *dev_priv = res->dev_priv;
603 int ret;
604
605 spin_lock(&dev_priv->resource_lock);
606 list_del_init(&res->lru_head);
607 spin_unlock(&dev_priv->resource_lock);
608
609 if (res->func->needs_backup && res->backup == NULL &&
610 !no_backup) {
611 ret = vmw_resource_buf_alloc(res, interruptible);
612 if (unlikely(ret != 0)) {
613 DRM_ERROR("Failed to allocate a backup buffer "
614 "of size %lu. bytes\n",
615 (unsigned long) res->backup_size);
616 return ret;
617 }
618 }
619
620 return 0;
621}
622
623/**
624 * vmw_resource_backoff_reservation - Unreserve and unreference a
625 * backup buffer
626 *.
627 * @ticket: The ww acquire ctx used for reservation.
628 * @val_buf: Backup buffer information.
629 */
630static void
631vmw_resource_backoff_reservation(struct ww_acquire_ctx *ticket,
632 struct ttm_validate_buffer *val_buf)
633{
634 struct list_head val_list;
635
636 if (likely(val_buf->bo == NULL))
637 return;
638
639 INIT_LIST_HEAD(&val_list);
640 list_add_tail(&val_buf->head, &val_list);
641 ttm_eu_backoff_reservation(ticket, &val_list);
642 ttm_bo_put(val_buf->bo);
643 val_buf->bo = NULL;
644}
645
646/**
647 * vmw_resource_do_evict - Evict a resource, and transfer its data
648 * to a backup buffer.
649 *
650 * @ticket: The ww acquire ticket to use, or NULL if trylocking.
651 * @res: The resource to evict.
652 * @interruptible: Whether to wait interruptible.
653 */
654static int vmw_resource_do_evict(struct ww_acquire_ctx *ticket,
655 struct vmw_resource *res, bool interruptible)
656{
657 struct ttm_validate_buffer val_buf;
658 const struct vmw_res_func *func = res->func;
659 int ret;
660
661 BUG_ON(!func->may_evict);
662
663 val_buf.bo = NULL;
664 val_buf.num_shared = 0;
665 ret = vmw_resource_check_buffer(ticket, res, interruptible, &val_buf);
666 if (unlikely(ret != 0))
667 return ret;
668
669 if (unlikely(func->unbind != NULL &&
670 (!func->needs_backup || vmw_resource_mob_attached(res)))) {
671 ret = func->unbind(res, res->res_dirty, &val_buf);
672 if (unlikely(ret != 0))
673 goto out_no_unbind;
674 vmw_resource_mob_detach(res);
675 }
676 ret = func->destroy(res);
677 res->backup_dirty = true;
678 res->res_dirty = false;
679out_no_unbind:
680 vmw_resource_backoff_reservation(ticket, &val_buf);
681
682 return ret;
683}
684
685
686/**
687 * vmw_resource_validate - Make a resource up-to-date and visible
688 * to the device.
689 * @res: The resource to make visible to the device.
690 * @intr: Perform waits interruptible if possible.
691 * @dirtying: Pending GPU operation will dirty the resource
692 *
693 * On succesful return, any backup DMA buffer pointed to by @res->backup will
694 * be reserved and validated.
695 * On hardware resource shortage, this function will repeatedly evict
696 * resources of the same type until the validation succeeds.
697 *
698 * Return: Zero on success, -ERESTARTSYS if interrupted, negative error code
699 * on failure.
700 */
701int vmw_resource_validate(struct vmw_resource *res, bool intr,
702 bool dirtying)
703{
704 int ret;
705 struct vmw_resource *evict_res;
706 struct vmw_private *dev_priv = res->dev_priv;
707 struct list_head *lru_list = &dev_priv->res_lru[res->func->res_type];
708 struct ttm_validate_buffer val_buf;
709 unsigned err_count = 0;
710
711 if (!res->func->create)
712 return 0;
713
714 val_buf.bo = NULL;
715 val_buf.num_shared = 0;
716 if (res->backup)
717 val_buf.bo = &res->backup->base;
718 do {
719 ret = vmw_resource_do_validate(res, &val_buf, dirtying);
720 if (likely(ret != -EBUSY))
721 break;
722
723 spin_lock(&dev_priv->resource_lock);
724 if (list_empty(lru_list) || !res->func->may_evict) {
725 DRM_ERROR("Out of device device resources "
726 "for %s.\n", res->func->type_name);
727 ret = -EBUSY;
728 spin_unlock(&dev_priv->resource_lock);
729 break;
730 }
731
732 evict_res = vmw_resource_reference
733 (list_first_entry(lru_list, struct vmw_resource,
734 lru_head));
735 list_del_init(&evict_res->lru_head);
736
737 spin_unlock(&dev_priv->resource_lock);
738
739 /* Trylock backup buffers with a NULL ticket. */
740 ret = vmw_resource_do_evict(NULL, evict_res, intr);
741 if (unlikely(ret != 0)) {
742 spin_lock(&dev_priv->resource_lock);
743 list_add_tail(&evict_res->lru_head, lru_list);
744 spin_unlock(&dev_priv->resource_lock);
745 if (ret == -ERESTARTSYS ||
746 ++err_count > VMW_RES_EVICT_ERR_COUNT) {
747 vmw_resource_unreference(&evict_res);
748 goto out_no_validate;
749 }
750 }
751
752 vmw_resource_unreference(&evict_res);
753 } while (1);
754
755 if (unlikely(ret != 0))
756 goto out_no_validate;
757 else if (!res->func->needs_backup && res->backup) {
758 WARN_ON_ONCE(vmw_resource_mob_attached(res));
759 vmw_bo_unreference(&res->backup);
760 }
761
762 return 0;
763
764out_no_validate:
765 return ret;
766}
767
768
769/**
770 * vmw_resource_unbind_list
771 *
772 * @vbo: Pointer to the current backing MOB.
773 *
774 * Evicts the Guest Backed hardware resource if the backup
775 * buffer is being moved out of MOB memory.
776 * Note that this function will not race with the resource
777 * validation code, since resource validation and eviction
778 * both require the backup buffer to be reserved.
779 */
780void vmw_resource_unbind_list(struct vmw_buffer_object *vbo)
781{
782 struct ttm_validate_buffer val_buf = {
783 .bo = &vbo->base,
784 .num_shared = 0
785 };
786
787 dma_resv_assert_held(vbo->base.base.resv);
788 while (!RB_EMPTY_ROOT(&vbo->res_tree)) {
789 struct rb_node *node = vbo->res_tree.rb_node;
790 struct vmw_resource *res =
791 container_of(node, struct vmw_resource, mob_node);
792
793 if (!WARN_ON_ONCE(!res->func->unbind))
794 (void) res->func->unbind(res, res->res_dirty, &val_buf);
795
796 res->backup_dirty = true;
797 res->res_dirty = false;
798 vmw_resource_mob_detach(res);
799 }
800
801 (void) ttm_bo_wait(&vbo->base, false, false);
802}
803
804
805/**
806 * vmw_query_readback_all - Read back cached query states
807 *
808 * @dx_query_mob: Buffer containing the DX query MOB
809 *
810 * Read back cached states from the device if they exist. This function
811 * assumings binding_mutex is held.
812 */
813int vmw_query_readback_all(struct vmw_buffer_object *dx_query_mob)
814{
815 struct vmw_resource *dx_query_ctx;
816 struct vmw_private *dev_priv;
817 struct {
818 SVGA3dCmdHeader header;
819 SVGA3dCmdDXReadbackAllQuery body;
820 } *cmd;
821
822
823 /* No query bound, so do nothing */
824 if (!dx_query_mob || !dx_query_mob->dx_query_ctx)
825 return 0;
826
827 dx_query_ctx = dx_query_mob->dx_query_ctx;
828 dev_priv = dx_query_ctx->dev_priv;
829
830 cmd = VMW_FIFO_RESERVE_DX(dev_priv, sizeof(*cmd), dx_query_ctx->id);
831 if (unlikely(cmd == NULL))
832 return -ENOMEM;
833
834 cmd->header.id = SVGA_3D_CMD_DX_READBACK_ALL_QUERY;
835 cmd->header.size = sizeof(cmd->body);
836 cmd->body.cid = dx_query_ctx->id;
837
838 vmw_fifo_commit(dev_priv, sizeof(*cmd));
839
840 /* Triggers a rebind the next time affected context is bound */
841 dx_query_mob->dx_query_ctx = NULL;
842
843 return 0;
844}
845
846
847
848/**
849 * vmw_query_move_notify - Read back cached query states
850 *
851 * @bo: The TTM buffer object about to move.
852 * @mem: The memory region @bo is moving to.
853 *
854 * Called before the query MOB is swapped out to read back cached query
855 * states from the device.
856 */
857void vmw_query_move_notify(struct ttm_buffer_object *bo,
858 struct ttm_mem_reg *mem)
859{
860 struct vmw_buffer_object *dx_query_mob;
861 struct ttm_bo_device *bdev = bo->bdev;
862 struct vmw_private *dev_priv;
863
864
865 dev_priv = container_of(bdev, struct vmw_private, bdev);
866
867 mutex_lock(&dev_priv->binding_mutex);
868
869 dx_query_mob = container_of(bo, struct vmw_buffer_object, base);
870 if (mem == NULL || !dx_query_mob || !dx_query_mob->dx_query_ctx) {
871 mutex_unlock(&dev_priv->binding_mutex);
872 return;
873 }
874
875 /* If BO is being moved from MOB to system memory */
876 if (mem->mem_type == TTM_PL_SYSTEM && bo->mem.mem_type == VMW_PL_MOB) {
877 struct vmw_fence_obj *fence;
878
879 (void) vmw_query_readback_all(dx_query_mob);
880 mutex_unlock(&dev_priv->binding_mutex);
881
882 /* Create a fence and attach the BO to it */
883 (void) vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
884 vmw_bo_fence_single(bo, fence);
885
886 if (fence != NULL)
887 vmw_fence_obj_unreference(&fence);
888
889 (void) ttm_bo_wait(bo, false, false);
890 } else
891 mutex_unlock(&dev_priv->binding_mutex);
892
893}
894
895/**
896 * vmw_resource_needs_backup - Return whether a resource needs a backup buffer.
897 *
898 * @res: The resource being queried.
899 */
900bool vmw_resource_needs_backup(const struct vmw_resource *res)
901{
902 return res->func->needs_backup;
903}
904
905/**
906 * vmw_resource_evict_type - Evict all resources of a specific type
907 *
908 * @dev_priv: Pointer to a device private struct
909 * @type: The resource type to evict
910 *
911 * To avoid thrashing starvation or as part of the hibernation sequence,
912 * try to evict all evictable resources of a specific type.
913 */
914static void vmw_resource_evict_type(struct vmw_private *dev_priv,
915 enum vmw_res_type type)
916{
917 struct list_head *lru_list = &dev_priv->res_lru[type];
918 struct vmw_resource *evict_res;
919 unsigned err_count = 0;
920 int ret;
921 struct ww_acquire_ctx ticket;
922
923 do {
924 spin_lock(&dev_priv->resource_lock);
925
926 if (list_empty(lru_list))
927 goto out_unlock;
928
929 evict_res = vmw_resource_reference(
930 list_first_entry(lru_list, struct vmw_resource,
931 lru_head));
932 list_del_init(&evict_res->lru_head);
933 spin_unlock(&dev_priv->resource_lock);
934
935 /* Wait lock backup buffers with a ticket. */
936 ret = vmw_resource_do_evict(&ticket, evict_res, false);
937 if (unlikely(ret != 0)) {
938 spin_lock(&dev_priv->resource_lock);
939 list_add_tail(&evict_res->lru_head, lru_list);
940 spin_unlock(&dev_priv->resource_lock);
941 if (++err_count > VMW_RES_EVICT_ERR_COUNT) {
942 vmw_resource_unreference(&evict_res);
943 return;
944 }
945 }
946
947 vmw_resource_unreference(&evict_res);
948 } while (1);
949
950out_unlock:
951 spin_unlock(&dev_priv->resource_lock);
952}
953
954/**
955 * vmw_resource_evict_all - Evict all evictable resources
956 *
957 * @dev_priv: Pointer to a device private struct
958 *
959 * To avoid thrashing starvation or as part of the hibernation sequence,
960 * evict all evictable resources. In particular this means that all
961 * guest-backed resources that are registered with the device are
962 * evicted and the OTable becomes clean.
963 */
964void vmw_resource_evict_all(struct vmw_private *dev_priv)
965{
966 enum vmw_res_type type;
967
968 mutex_lock(&dev_priv->cmdbuf_mutex);
969
970 for (type = 0; type < vmw_res_max; ++type)
971 vmw_resource_evict_type(dev_priv, type);
972
973 mutex_unlock(&dev_priv->cmdbuf_mutex);
974}
975
976/**
977 * vmw_resource_pin - Add a pin reference on a resource
978 *
979 * @res: The resource to add a pin reference on
980 *
981 * This function adds a pin reference, and if needed validates the resource.
982 * Having a pin reference means that the resource can never be evicted, and
983 * its id will never change as long as there is a pin reference.
984 * This function returns 0 on success and a negative error code on failure.
985 */
986int vmw_resource_pin(struct vmw_resource *res, bool interruptible)
987{
988 struct ttm_operation_ctx ctx = { interruptible, false };
989 struct vmw_private *dev_priv = res->dev_priv;
990 int ret;
991
992 ttm_write_lock(&dev_priv->reservation_sem, interruptible);
993 mutex_lock(&dev_priv->cmdbuf_mutex);
994 ret = vmw_resource_reserve(res, interruptible, false);
995 if (ret)
996 goto out_no_reserve;
997
998 if (res->pin_count == 0) {
999 struct vmw_buffer_object *vbo = NULL;
1000
1001 if (res->backup) {
1002 vbo = res->backup;
1003
1004 ttm_bo_reserve(&vbo->base, interruptible, false, NULL);
1005 if (!vbo->pin_count) {
1006 ret = ttm_bo_validate
1007 (&vbo->base,
1008 res->func->backup_placement,
1009 &ctx);
1010 if (ret) {
1011 ttm_bo_unreserve(&vbo->base);
1012 goto out_no_validate;
1013 }
1014 }
1015
1016 /* Do we really need to pin the MOB as well? */
1017 vmw_bo_pin_reserved(vbo, true);
1018 }
1019 ret = vmw_resource_validate(res, interruptible, true);
1020 if (vbo)
1021 ttm_bo_unreserve(&vbo->base);
1022 if (ret)
1023 goto out_no_validate;
1024 }
1025 res->pin_count++;
1026
1027out_no_validate:
1028 vmw_resource_unreserve(res, false, false, false, NULL, 0UL);
1029out_no_reserve:
1030 mutex_unlock(&dev_priv->cmdbuf_mutex);
1031 ttm_write_unlock(&dev_priv->reservation_sem);
1032
1033 return ret;
1034}
1035
1036/**
1037 * vmw_resource_unpin - Remove a pin reference from a resource
1038 *
1039 * @res: The resource to remove a pin reference from
1040 *
1041 * Having a pin reference means that the resource can never be evicted, and
1042 * its id will never change as long as there is a pin reference.
1043 */
1044void vmw_resource_unpin(struct vmw_resource *res)
1045{
1046 struct vmw_private *dev_priv = res->dev_priv;
1047 int ret;
1048
1049 (void) ttm_read_lock(&dev_priv->reservation_sem, false);
1050 mutex_lock(&dev_priv->cmdbuf_mutex);
1051
1052 ret = vmw_resource_reserve(res, false, true);
1053 WARN_ON(ret);
1054
1055 WARN_ON(res->pin_count == 0);
1056 if (--res->pin_count == 0 && res->backup) {
1057 struct vmw_buffer_object *vbo = res->backup;
1058
1059 (void) ttm_bo_reserve(&vbo->base, false, false, NULL);
1060 vmw_bo_pin_reserved(vbo, false);
1061 ttm_bo_unreserve(&vbo->base);
1062 }
1063
1064 vmw_resource_unreserve(res, false, false, false, NULL, 0UL);
1065
1066 mutex_unlock(&dev_priv->cmdbuf_mutex);
1067 ttm_read_unlock(&dev_priv->reservation_sem);
1068}
1069
1070/**
1071 * vmw_res_type - Return the resource type
1072 *
1073 * @res: Pointer to the resource
1074 */
1075enum vmw_res_type vmw_res_type(const struct vmw_resource *res)
1076{
1077 return res->func->res_type;
1078}
1079
1080/**
1081 * vmw_resource_update_dirty - Update a resource's dirty tracker with a
1082 * sequential range of touched backing store memory.
1083 * @res: The resource.
1084 * @start: The first page touched.
1085 * @end: The last page touched + 1.
1086 */
1087void vmw_resource_dirty_update(struct vmw_resource *res, pgoff_t start,
1088 pgoff_t end)
1089{
1090 if (res->dirty)
1091 res->func->dirty_range_add(res, start << PAGE_SHIFT,
1092 end << PAGE_SHIFT);
1093}
1094
1095/**
1096 * vmw_resources_clean - Clean resources intersecting a mob range
1097 * @vbo: The mob buffer object
1098 * @start: The mob page offset starting the range
1099 * @end: The mob page offset ending the range
1100 * @num_prefault: Returns how many pages including the first have been
1101 * cleaned and are ok to prefault
1102 */
1103int vmw_resources_clean(struct vmw_buffer_object *vbo, pgoff_t start,
1104 pgoff_t end, pgoff_t *num_prefault)
1105{
1106 struct rb_node *cur = vbo->res_tree.rb_node;
1107 struct vmw_resource *found = NULL;
1108 unsigned long res_start = start << PAGE_SHIFT;
1109 unsigned long res_end = end << PAGE_SHIFT;
1110 unsigned long last_cleaned = 0;
1111
1112 /*
1113 * Find the resource with lowest backup_offset that intersects the
1114 * range.
1115 */
1116 while (cur) {
1117 struct vmw_resource *cur_res =
1118 container_of(cur, struct vmw_resource, mob_node);
1119
1120 if (cur_res->backup_offset >= res_end) {
1121 cur = cur->rb_left;
1122 } else if (cur_res->backup_offset + cur_res->backup_size <=
1123 res_start) {
1124 cur = cur->rb_right;
1125 } else {
1126 found = cur_res;
1127 cur = cur->rb_left;
1128 /* Continue to look for resources with lower offsets */
1129 }
1130 }
1131
1132 /*
1133 * In order of increasing backup_offset, clean dirty resorces
1134 * intersecting the range.
1135 */
1136 while (found) {
1137 if (found->res_dirty) {
1138 int ret;
1139
1140 if (!found->func->clean)
1141 return -EINVAL;
1142
1143 ret = found->func->clean(found);
1144 if (ret)
1145 return ret;
1146
1147 found->res_dirty = false;
1148 }
1149 last_cleaned = found->backup_offset + found->backup_size;
1150 cur = rb_next(&found->mob_node);
1151 if (!cur)
1152 break;
1153
1154 found = container_of(cur, struct vmw_resource, mob_node);
1155 if (found->backup_offset >= res_end)
1156 break;
1157 }
1158
1159 /*
1160 * Set number of pages allowed prefaulting and fence the buffer object
1161 */
1162 *num_prefault = 1;
1163 if (last_cleaned > res_start) {
1164 struct ttm_buffer_object *bo = &vbo->base;
1165
1166 *num_prefault = __KERNEL_DIV_ROUND_UP(last_cleaned - res_start,
1167 PAGE_SIZE);
1168 vmw_bo_fence_single(bo, NULL);
1169 if (bo->moving)
1170 dma_fence_put(bo->moving);
1171 bo->moving = dma_fence_get
1172 (dma_resv_get_excl(bo->base.resv));
1173 }
1174
1175 return 0;
1176}