drm/ttm: allow fence to be added as shared
[deliverable/linux.git] / drivers / gpu / drm / vmwgfx / vmwgfx_resource.c
CommitLineData
fb1d9738
JB
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"
760285e7
DH
29#include <drm/vmwgfx_drm.h>
30#include <drm/ttm/ttm_object.h>
31#include <drm/ttm/ttm_placement.h>
32#include <drm/drmP.h>
543831cf 33#include "vmwgfx_resource_priv.h"
fb1d9738 34
ea029c28
TH
35#define VMW_RES_EVICT_ERR_COUNT 10
36
fb1d9738 37struct vmw_user_dma_buffer {
c486d4f8 38 struct ttm_prime_object prime;
fb1d9738
JB
39 struct vmw_dma_buffer dma;
40};
41
42struct vmw_bo_user_rep {
43 uint32_t handle;
44 uint64_t map_handle;
45};
46
47struct vmw_stream {
48 struct vmw_resource res;
49 uint32_t stream_id;
50};
51
52struct vmw_user_stream {
53 struct ttm_base_object base;
54 struct vmw_stream stream;
55};
56
c0951b79
TH
57
58static uint64_t vmw_user_stream_size;
59
60static const struct vmw_res_func vmw_stream_func = {
61 .res_type = vmw_res_stream,
62 .needs_backup = false,
63 .may_evict = false,
64 .type_name = "video streams",
65 .backup_placement = NULL,
66 .create = NULL,
67 .destroy = NULL,
68 .bind = NULL,
69 .unbind = NULL
70};
71
fb1d9738
JB
72static inline struct vmw_dma_buffer *
73vmw_dma_buffer(struct ttm_buffer_object *bo)
74{
75 return container_of(bo, struct vmw_dma_buffer, base);
76}
77
78static inline struct vmw_user_dma_buffer *
79vmw_user_dma_buffer(struct ttm_buffer_object *bo)
80{
81 struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
82 return container_of(vmw_bo, struct vmw_user_dma_buffer, dma);
83}
84
85struct vmw_resource *vmw_resource_reference(struct vmw_resource *res)
86{
87 kref_get(&res->kref);
88 return res;
89}
90
30f82d81
TH
91struct vmw_resource *
92vmw_resource_reference_unless_doomed(struct vmw_resource *res)
93{
94 return kref_get_unless_zero(&res->kref) ? res : NULL;
95}
5bb39e81
TH
96
97/**
98 * vmw_resource_release_id - release a resource id to the id manager.
99 *
100 * @res: Pointer to the resource.
101 *
102 * Release the resource id to the resource id manager and set it to -1
103 */
543831cf 104void vmw_resource_release_id(struct vmw_resource *res)
5bb39e81
TH
105{
106 struct vmw_private *dev_priv = res->dev_priv;
c0951b79 107 struct idr *idr = &dev_priv->res_idr[res->func->res_type];
5bb39e81
TH
108
109 write_lock(&dev_priv->resource_lock);
110 if (res->id != -1)
c0951b79 111 idr_remove(idr, res->id);
5bb39e81
TH
112 res->id = -1;
113 write_unlock(&dev_priv->resource_lock);
114}
115
fb1d9738
JB
116static void vmw_resource_release(struct kref *kref)
117{
118 struct vmw_resource *res =
119 container_of(kref, struct vmw_resource, kref);
120 struct vmw_private *dev_priv = res->dev_priv;
c0951b79
TH
121 int id;
122 struct idr *idr = &dev_priv->res_idr[res->func->res_type];
fb1d9738 123
5bb39e81 124 res->avail = false;
c0951b79 125 list_del_init(&res->lru_head);
fb1d9738 126 write_unlock(&dev_priv->resource_lock);
c0951b79
TH
127 if (res->backup) {
128 struct ttm_buffer_object *bo = &res->backup->base;
129
ee3939e0 130 ttm_bo_reserve(bo, false, false, false, NULL);
c0951b79
TH
131 if (!list_empty(&res->mob_head) &&
132 res->func->unbind != NULL) {
133 struct ttm_validate_buffer val_buf;
134
135 val_buf.bo = bo;
ae9c0af2 136 val_buf.shared = false;
c0951b79
TH
137 res->func->unbind(res, false, &val_buf);
138 }
139 res->backup_dirty = false;
140 list_del_init(&res->mob_head);
141 ttm_bo_unreserve(bo);
142 vmw_dmabuf_unreference(&res->backup);
143 }
fb1d9738 144
30f82d81 145 if (likely(res->hw_destroy != NULL)) {
fb1d9738 146 res->hw_destroy(res);
30f82d81
TH
147 mutex_lock(&dev_priv->binding_mutex);
148 vmw_context_binding_res_list_kill(&res->binding_head);
149 mutex_unlock(&dev_priv->binding_mutex);
150 }
fb1d9738 151
c0951b79 152 id = res->id;
fb1d9738
JB
153 if (res->res_free != NULL)
154 res->res_free(res);
155 else
156 kfree(res);
157
158 write_lock(&dev_priv->resource_lock);
5bb39e81
TH
159
160 if (id != -1)
161 idr_remove(idr, id);
fb1d9738
JB
162}
163
164void vmw_resource_unreference(struct vmw_resource **p_res)
165{
166 struct vmw_resource *res = *p_res;
167 struct vmw_private *dev_priv = res->dev_priv;
168
169 *p_res = NULL;
170 write_lock(&dev_priv->resource_lock);
171 kref_put(&res->kref, vmw_resource_release);
172 write_unlock(&dev_priv->resource_lock);
173}
174
5bb39e81
TH
175
176/**
177 * vmw_resource_alloc_id - release a resource id to the id manager.
178 *
5bb39e81
TH
179 * @res: Pointer to the resource.
180 *
181 * Allocate the lowest free resource from the resource manager, and set
182 * @res->id to that id. Returns 0 on success and -ENOMEM on failure.
183 */
543831cf 184int vmw_resource_alloc_id(struct vmw_resource *res)
5bb39e81 185{
c0951b79 186 struct vmw_private *dev_priv = res->dev_priv;
5bb39e81 187 int ret;
c0951b79 188 struct idr *idr = &dev_priv->res_idr[res->func->res_type];
5bb39e81
TH
189
190 BUG_ON(res->id != -1);
191
cc39a8fa
TH
192 idr_preload(GFP_KERNEL);
193 write_lock(&dev_priv->resource_lock);
5bb39e81 194
cc39a8fa
TH
195 ret = idr_alloc(idr, res, 1, 0, GFP_NOWAIT);
196 if (ret >= 0)
197 res->id = ret;
5bb39e81 198
cc39a8fa
TH
199 write_unlock(&dev_priv->resource_lock);
200 idr_preload_end();
201 return ret < 0 ? ret : 0;
5bb39e81
TH
202}
203
c0951b79
TH
204/**
205 * vmw_resource_init - initialize a struct vmw_resource
206 *
207 * @dev_priv: Pointer to a device private struct.
208 * @res: The struct vmw_resource to initialize.
209 * @obj_type: Resource object type.
210 * @delay_id: Boolean whether to defer device id allocation until
211 * the first validation.
212 * @res_free: Resource destructor.
213 * @func: Resource function table.
214 */
543831cf
TH
215int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res,
216 bool delay_id,
217 void (*res_free) (struct vmw_resource *res),
218 const struct vmw_res_func *func)
fb1d9738 219{
fb1d9738
JB
220 kref_init(&res->kref);
221 res->hw_destroy = NULL;
222 res->res_free = res_free;
fb1d9738
JB
223 res->avail = false;
224 res->dev_priv = dev_priv;
c0951b79
TH
225 res->func = func;
226 INIT_LIST_HEAD(&res->lru_head);
227 INIT_LIST_HEAD(&res->mob_head);
173fb7d4 228 INIT_LIST_HEAD(&res->binding_head);
5bb39e81 229 res->id = -1;
c0951b79
TH
230 res->backup = NULL;
231 res->backup_offset = 0;
232 res->backup_dirty = false;
233 res->res_dirty = false;
5bb39e81
TH
234 if (delay_id)
235 return 0;
236 else
c0951b79 237 return vmw_resource_alloc_id(res);
fb1d9738
JB
238}
239
240/**
241 * vmw_resource_activate
242 *
243 * @res: Pointer to the newly created resource
244 * @hw_destroy: Destroy function. NULL if none.
245 *
246 * Activate a resource after the hardware has been made aware of it.
247 * Set tye destroy function to @destroy. Typically this frees the
248 * resource and destroys the hardware resources associated with it.
249 * Activate basically means that the function vmw_resource_lookup will
250 * find it.
251 */
543831cf
TH
252void vmw_resource_activate(struct vmw_resource *res,
253 void (*hw_destroy) (struct vmw_resource *))
fb1d9738
JB
254{
255 struct vmw_private *dev_priv = res->dev_priv;
256
257 write_lock(&dev_priv->resource_lock);
258 res->avail = true;
259 res->hw_destroy = hw_destroy;
260 write_unlock(&dev_priv->resource_lock);
261}
262
263struct vmw_resource *vmw_resource_lookup(struct vmw_private *dev_priv,
264 struct idr *idr, int id)
265{
266 struct vmw_resource *res;
267
268 read_lock(&dev_priv->resource_lock);
269 res = idr_find(idr, id);
270 if (res && res->avail)
271 kref_get(&res->kref);
272 else
273 res = NULL;
274 read_unlock(&dev_priv->resource_lock);
275
276 if (unlikely(res == NULL))
277 return NULL;
278
279 return res;
280}
281
c0951b79
TH
282/**
283 * vmw_user_resource_lookup_handle - lookup a struct resource from a
284 * TTM user-space handle and perform basic type checks
285 *
286 * @dev_priv: Pointer to a device private struct
287 * @tfile: Pointer to a struct ttm_object_file identifying the caller
288 * @handle: The TTM user-space handle
289 * @converter: Pointer to an object describing the resource type
290 * @p_res: On successful return the location pointed to will contain
291 * a pointer to a refcounted struct vmw_resource.
292 *
293 * If the handle can't be found or is associated with an incorrect resource
294 * type, -EINVAL will be returned.
295 */
296int vmw_user_resource_lookup_handle(struct vmw_private *dev_priv,
297 struct ttm_object_file *tfile,
298 uint32_t handle,
299 const struct vmw_user_resource_conv
300 *converter,
301 struct vmw_resource **p_res)
fb1d9738 302{
7a73ba74 303 struct ttm_base_object *base;
c0951b79
TH
304 struct vmw_resource *res;
305 int ret = -EINVAL;
fb1d9738 306
7a73ba74
TH
307 base = ttm_base_object_lookup(tfile, handle);
308 if (unlikely(base == NULL))
309 return -EINVAL;
310
79e5f810 311 if (unlikely(ttm_base_object_type(base) != converter->object_type))
c0951b79 312 goto out_bad_resource;
7a73ba74 313
c0951b79 314 res = converter->base_obj_to_res(base);
7a73ba74 315
c0951b79
TH
316 read_lock(&dev_priv->resource_lock);
317 if (!res->avail || res->res_free != converter->res_free) {
318 read_unlock(&dev_priv->resource_lock);
319 goto out_bad_resource;
320 }
fb1d9738 321
c0951b79
TH
322 kref_get(&res->kref);
323 read_unlock(&dev_priv->resource_lock);
324
325 *p_res = res;
326 ret = 0;
327
328out_bad_resource:
7a73ba74 329 ttm_base_object_unref(&base);
c0951b79
TH
330
331 return ret;
332}
333
334/**
335 * Helper function that looks either a surface or dmabuf.
336 *
337 * The pointer this pointed at by out_surf and out_buf needs to be null.
338 */
339int vmw_user_lookup_handle(struct vmw_private *dev_priv,
340 struct ttm_object_file *tfile,
341 uint32_t handle,
342 struct vmw_surface **out_surf,
343 struct vmw_dma_buffer **out_buf)
344{
345 struct vmw_resource *res;
346 int ret;
347
348 BUG_ON(*out_surf || *out_buf);
349
350 ret = vmw_user_resource_lookup_handle(dev_priv, tfile, handle,
351 user_surface_converter,
352 &res);
353 if (!ret) {
354 *out_surf = vmw_res_to_srf(res);
355 return 0;
356 }
357
358 *out_surf = NULL;
359 ret = vmw_user_dmabuf_lookup(tfile, handle, out_buf);
fb1d9738
JB
360 return ret;
361}
362
363/**
364 * Buffer management.
365 */
308d17ef
TH
366
367/**
368 * vmw_dmabuf_acc_size - Calculate the pinned memory usage of buffers
369 *
370 * @dev_priv: Pointer to a struct vmw_private identifying the device.
371 * @size: The requested buffer size.
372 * @user: Whether this is an ordinary dma buffer or a user dma buffer.
373 */
374static size_t vmw_dmabuf_acc_size(struct vmw_private *dev_priv, size_t size,
375 bool user)
376{
377 static size_t struct_size, user_struct_size;
378 size_t num_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
379 size_t page_array_size = ttm_round_pot(num_pages * sizeof(void *));
380
381 if (unlikely(struct_size == 0)) {
382 size_t backend_size = ttm_round_pot(vmw_tt_size);
383
384 struct_size = backend_size +
385 ttm_round_pot(sizeof(struct vmw_dma_buffer));
386 user_struct_size = backend_size +
387 ttm_round_pot(sizeof(struct vmw_user_dma_buffer));
388 }
389
390 if (dev_priv->map_mode == vmw_dma_alloc_coherent)
391 page_array_size +=
392 ttm_round_pot(num_pages * sizeof(dma_addr_t));
393
394 return ((user) ? user_struct_size : struct_size) +
395 page_array_size;
396}
397
effe1105
TH
398void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo)
399{
400 struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
effe1105 401
fb1d9738
JB
402 kfree(vmw_bo);
403}
404
308d17ef
TH
405static void vmw_user_dmabuf_destroy(struct ttm_buffer_object *bo)
406{
407 struct vmw_user_dma_buffer *vmw_user_bo = vmw_user_dma_buffer(bo);
408
409 ttm_prime_object_kfree(vmw_user_bo, prime);
410}
411
fb1d9738
JB
412int vmw_dmabuf_init(struct vmw_private *dev_priv,
413 struct vmw_dma_buffer *vmw_bo,
414 size_t size, struct ttm_placement *placement,
415 bool interruptible,
416 void (*bo_free) (struct ttm_buffer_object *bo))
417{
418 struct ttm_bo_device *bdev = &dev_priv->bdev;
fb1d9738
JB
419 size_t acc_size;
420 int ret;
308d17ef 421 bool user = (bo_free == &vmw_user_dmabuf_destroy);
fb1d9738 422
308d17ef 423 BUG_ON(!bo_free && (!user && (bo_free != vmw_dmabuf_bo_free)));
fb1d9738 424
308d17ef 425 acc_size = vmw_dmabuf_acc_size(dev_priv, size, user);
fb1d9738
JB
426 memset(vmw_bo, 0, sizeof(*vmw_bo));
427
c0951b79 428 INIT_LIST_HEAD(&vmw_bo->res_list);
fb1d9738
JB
429
430 ret = ttm_bo_init(bdev, &vmw_bo->base, size,
a34417f6 431 ttm_bo_type_device, placement,
0b91c4a1 432 0, interruptible,
129b78bf 433 NULL, acc_size, NULL, bo_free);
fb1d9738
JB
434 return ret;
435}
436
fb1d9738
JB
437static void vmw_user_dmabuf_release(struct ttm_base_object **p_base)
438{
439 struct vmw_user_dma_buffer *vmw_user_bo;
440 struct ttm_base_object *base = *p_base;
441 struct ttm_buffer_object *bo;
442
443 *p_base = NULL;
444
445 if (unlikely(base == NULL))
446 return;
447
c486d4f8
TH
448 vmw_user_bo = container_of(base, struct vmw_user_dma_buffer,
449 prime.base);
fb1d9738
JB
450 bo = &vmw_user_bo->dma.base;
451 ttm_bo_unref(&bo);
452}
453
1d7a5cbf
TH
454static void vmw_user_dmabuf_ref_obj_release(struct ttm_base_object *base,
455 enum ttm_ref_type ref_type)
456{
457 struct vmw_user_dma_buffer *user_bo;
458 user_bo = container_of(base, struct vmw_user_dma_buffer, prime.base);
459
460 switch (ref_type) {
461 case TTM_REF_SYNCCPU_WRITE:
462 ttm_bo_synccpu_write_release(&user_bo->dma.base);
463 break;
464 default:
465 BUG();
466 }
467}
468
c0951b79
TH
469/**
470 * vmw_user_dmabuf_alloc - Allocate a user dma buffer
471 *
472 * @dev_priv: Pointer to a struct device private.
473 * @tfile: Pointer to a struct ttm_object_file on which to register the user
474 * object.
475 * @size: Size of the dma buffer.
476 * @shareable: Boolean whether the buffer is shareable with other open files.
477 * @handle: Pointer to where the handle value should be assigned.
478 * @p_dma_buf: Pointer to where the refcounted struct vmw_dma_buffer pointer
479 * should be assigned.
480 */
481int vmw_user_dmabuf_alloc(struct vmw_private *dev_priv,
482 struct ttm_object_file *tfile,
483 uint32_t size,
484 bool shareable,
485 uint32_t *handle,
486 struct vmw_dma_buffer **p_dma_buf)
487{
488 struct vmw_user_dma_buffer *user_bo;
489 struct ttm_buffer_object *tmp;
490 int ret;
491
492 user_bo = kzalloc(sizeof(*user_bo), GFP_KERNEL);
493 if (unlikely(user_bo == NULL)) {
494 DRM_ERROR("Failed to allocate a buffer.\n");
495 return -ENOMEM;
496 }
497
498 ret = vmw_dmabuf_init(dev_priv, &user_bo->dma, size,
96c5f0df
TH
499 (dev_priv->has_mob) ?
500 &vmw_sys_placement :
c0951b79
TH
501 &vmw_vram_sys_placement, true,
502 &vmw_user_dmabuf_destroy);
503 if (unlikely(ret != 0))
504 return ret;
505
506 tmp = ttm_bo_reference(&user_bo->dma.base);
c486d4f8
TH
507 ret = ttm_prime_object_init(tfile,
508 size,
509 &user_bo->prime,
510 shareable,
511 ttm_buffer_type,
1d7a5cbf
TH
512 &vmw_user_dmabuf_release,
513 &vmw_user_dmabuf_ref_obj_release);
c0951b79
TH
514 if (unlikely(ret != 0)) {
515 ttm_bo_unref(&tmp);
516 goto out_no_base_object;
517 }
518
519 *p_dma_buf = &user_bo->dma;
c486d4f8 520 *handle = user_bo->prime.base.hash.key;
c0951b79
TH
521
522out_no_base_object:
523 return ret;
524}
525
d08a9b9c
TH
526/**
527 * vmw_user_dmabuf_verify_access - verify access permissions on this
528 * buffer object.
529 *
530 * @bo: Pointer to the buffer object being accessed
531 * @tfile: Identifying the caller.
532 */
533int vmw_user_dmabuf_verify_access(struct ttm_buffer_object *bo,
534 struct ttm_object_file *tfile)
535{
536 struct vmw_user_dma_buffer *vmw_user_bo;
537
538 if (unlikely(bo->destroy != vmw_user_dmabuf_destroy))
539 return -EPERM;
540
541 vmw_user_bo = vmw_user_dma_buffer(bo);
f6dfe73a
TH
542
543 /* Check that the caller has opened the object. */
544 if (likely(ttm_ref_object_exists(tfile, &vmw_user_bo->prime.base)))
545 return 0;
546
547 DRM_ERROR("Could not grant buffer access.\n");
548 return -EPERM;
d08a9b9c
TH
549}
550
1d7a5cbf
TH
551/**
552 * vmw_user_dmabuf_synccpu_grab - Grab a struct vmw_user_dma_buffer for cpu
553 * access, idling previous GPU operations on the buffer and optionally
554 * blocking it for further command submissions.
555 *
556 * @user_bo: Pointer to the buffer object being grabbed for CPU access
557 * @tfile: Identifying the caller.
558 * @flags: Flags indicating how the grab should be performed.
559 *
560 * A blocking grab will be automatically released when @tfile is closed.
561 */
562static int vmw_user_dmabuf_synccpu_grab(struct vmw_user_dma_buffer *user_bo,
563 struct ttm_object_file *tfile,
564 uint32_t flags)
565{
566 struct ttm_buffer_object *bo = &user_bo->dma.base;
567 bool existed;
568 int ret;
569
570 if (flags & drm_vmw_synccpu_allow_cs) {
dd7cfd64 571 bool nonblock = !!(flags & drm_vmw_synccpu_dontblock);
5fbad992 572 long lret;
1d7a5cbf 573
5fbad992
ML
574 if (nonblock)
575 return reservation_object_test_signaled_rcu(bo->resv, true) ? 0 : -EBUSY;
576
577 lret = reservation_object_wait_timeout_rcu(bo->resv, true, true, MAX_SCHEDULE_TIMEOUT);
578 if (!lret)
579 return -EBUSY;
580 else if (lret < 0)
581 return lret;
582 return 0;
1d7a5cbf
TH
583 }
584
585 ret = ttm_bo_synccpu_write_grab
586 (bo, !!(flags & drm_vmw_synccpu_dontblock));
587 if (unlikely(ret != 0))
588 return ret;
589
590 ret = ttm_ref_object_add(tfile, &user_bo->prime.base,
591 TTM_REF_SYNCCPU_WRITE, &existed);
592 if (ret != 0 || existed)
593 ttm_bo_synccpu_write_release(&user_bo->dma.base);
594
595 return ret;
596}
597
598/**
599 * vmw_user_dmabuf_synccpu_release - Release a previous grab for CPU access,
600 * and unblock command submission on the buffer if blocked.
601 *
602 * @handle: Handle identifying the buffer object.
603 * @tfile: Identifying the caller.
604 * @flags: Flags indicating the type of release.
605 */
606static int vmw_user_dmabuf_synccpu_release(uint32_t handle,
607 struct ttm_object_file *tfile,
608 uint32_t flags)
609{
610 if (!(flags & drm_vmw_synccpu_allow_cs))
611 return ttm_ref_object_base_unref(tfile, handle,
612 TTM_REF_SYNCCPU_WRITE);
613
614 return 0;
615}
616
617/**
618 * vmw_user_dmabuf_synccpu_release - ioctl function implementing the synccpu
619 * functionality.
620 *
621 * @dev: Identifies the drm device.
622 * @data: Pointer to the ioctl argument.
623 * @file_priv: Identifies the caller.
624 *
625 * This function checks the ioctl arguments for validity and calls the
626 * relevant synccpu functions.
627 */
628int vmw_user_dmabuf_synccpu_ioctl(struct drm_device *dev, void *data,
629 struct drm_file *file_priv)
630{
631 struct drm_vmw_synccpu_arg *arg =
632 (struct drm_vmw_synccpu_arg *) data;
633 struct vmw_dma_buffer *dma_buf;
634 struct vmw_user_dma_buffer *user_bo;
635 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
636 int ret;
637
638 if ((arg->flags & (drm_vmw_synccpu_read | drm_vmw_synccpu_write)) == 0
639 || (arg->flags & ~(drm_vmw_synccpu_read | drm_vmw_synccpu_write |
640 drm_vmw_synccpu_dontblock |
641 drm_vmw_synccpu_allow_cs)) != 0) {
642 DRM_ERROR("Illegal synccpu flags.\n");
643 return -EINVAL;
644 }
645
646 switch (arg->op) {
647 case drm_vmw_synccpu_grab:
648 ret = vmw_user_dmabuf_lookup(tfile, arg->handle, &dma_buf);
649 if (unlikely(ret != 0))
650 return ret;
651
652 user_bo = container_of(dma_buf, struct vmw_user_dma_buffer,
653 dma);
654 ret = vmw_user_dmabuf_synccpu_grab(user_bo, tfile, arg->flags);
655 vmw_dmabuf_unreference(&dma_buf);
656 if (unlikely(ret != 0 && ret != -ERESTARTSYS &&
657 ret != -EBUSY)) {
658 DRM_ERROR("Failed synccpu grab on handle 0x%08x.\n",
659 (unsigned int) arg->handle);
660 return ret;
661 }
662 break;
663 case drm_vmw_synccpu_release:
664 ret = vmw_user_dmabuf_synccpu_release(arg->handle, tfile,
665 arg->flags);
666 if (unlikely(ret != 0)) {
667 DRM_ERROR("Failed synccpu release on handle 0x%08x.\n",
668 (unsigned int) arg->handle);
669 return ret;
670 }
671 break;
672 default:
673 DRM_ERROR("Invalid synccpu operation.\n");
674 return -EINVAL;
675 }
676
677 return 0;
678}
679
fb1d9738
JB
680int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data,
681 struct drm_file *file_priv)
682{
683 struct vmw_private *dev_priv = vmw_priv(dev);
684 union drm_vmw_alloc_dmabuf_arg *arg =
685 (union drm_vmw_alloc_dmabuf_arg *)data;
686 struct drm_vmw_alloc_dmabuf_req *req = &arg->req;
687 struct drm_vmw_dmabuf_rep *rep = &arg->rep;
c0951b79
TH
688 struct vmw_dma_buffer *dma_buf;
689 uint32_t handle;
fb1d9738
JB
690 int ret;
691
294adf7d 692 ret = ttm_read_lock(&dev_priv->reservation_sem, true);
c0951b79 693 if (unlikely(ret != 0))
fb1d9738 694 return ret;
fb1d9738 695
c0951b79
TH
696 ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile,
697 req->size, false, &handle, &dma_buf);
fb1d9738 698 if (unlikely(ret != 0))
2f5993cc 699 goto out_no_dmabuf;
fb1d9738 700
c0951b79 701 rep->handle = handle;
72525b3f 702 rep->map_handle = drm_vma_node_offset_addr(&dma_buf->base.vma_node);
c0951b79
TH
703 rep->cur_gmr_id = handle;
704 rep->cur_gmr_offset = 0;
705
706 vmw_dmabuf_unreference(&dma_buf);
fb1d9738 707
2f5993cc 708out_no_dmabuf:
294adf7d 709 ttm_read_unlock(&dev_priv->reservation_sem);
fb1d9738 710
2f5993cc 711 return ret;
fb1d9738
JB
712}
713
714int vmw_dmabuf_unref_ioctl(struct drm_device *dev, void *data,
715 struct drm_file *file_priv)
716{
717 struct drm_vmw_unref_dmabuf_arg *arg =
718 (struct drm_vmw_unref_dmabuf_arg *)data;
719
720 return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
721 arg->handle,
722 TTM_REF_USAGE);
723}
724
fb1d9738
JB
725int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile,
726 uint32_t handle, struct vmw_dma_buffer **out)
727{
728 struct vmw_user_dma_buffer *vmw_user_bo;
729 struct ttm_base_object *base;
730
731 base = ttm_base_object_lookup(tfile, handle);
732 if (unlikely(base == NULL)) {
733 printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n",
734 (unsigned long)handle);
735 return -ESRCH;
736 }
737
c486d4f8 738 if (unlikely(ttm_base_object_type(base) != ttm_buffer_type)) {
fb1d9738
JB
739 ttm_base_object_unref(&base);
740 printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n",
741 (unsigned long)handle);
742 return -EINVAL;
743 }
744
c486d4f8
TH
745 vmw_user_bo = container_of(base, struct vmw_user_dma_buffer,
746 prime.base);
fb1d9738
JB
747 (void)ttm_bo_reference(&vmw_user_bo->dma.base);
748 ttm_base_object_unref(&base);
749 *out = &vmw_user_bo->dma;
750
751 return 0;
752}
753
c0951b79 754int vmw_user_dmabuf_reference(struct ttm_object_file *tfile,
a97e2192
TH
755 struct vmw_dma_buffer *dma_buf,
756 uint32_t *handle)
c0951b79
TH
757{
758 struct vmw_user_dma_buffer *user_bo;
759
760 if (dma_buf->base.destroy != vmw_user_dmabuf_destroy)
761 return -EINVAL;
762
763 user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, dma);
a97e2192
TH
764
765 *handle = user_bo->prime.base.hash.key;
c486d4f8
TH
766 return ttm_ref_object_add(tfile, &user_bo->prime.base,
767 TTM_REF_USAGE, NULL);
c0951b79
TH
768}
769
fb1d9738 770/*
65155b37 771 * Stream management
fb1d9738
JB
772 */
773
774static void vmw_stream_destroy(struct vmw_resource *res)
775{
776 struct vmw_private *dev_priv = res->dev_priv;
777 struct vmw_stream *stream;
778 int ret;
779
780 DRM_INFO("%s: unref\n", __func__);
781 stream = container_of(res, struct vmw_stream, res);
782
783 ret = vmw_overlay_unref(dev_priv, stream->stream_id);
784 WARN_ON(ret != 0);
785}
786
787static int vmw_stream_init(struct vmw_private *dev_priv,
788 struct vmw_stream *stream,
789 void (*res_free) (struct vmw_resource *res))
790{
791 struct vmw_resource *res = &stream->res;
792 int ret;
793
c0951b79
TH
794 ret = vmw_resource_init(dev_priv, res, false, res_free,
795 &vmw_stream_func);
fb1d9738
JB
796
797 if (unlikely(ret != 0)) {
798 if (res_free == NULL)
799 kfree(stream);
800 else
801 res_free(&stream->res);
802 return ret;
803 }
804
805 ret = vmw_overlay_claim(dev_priv, &stream->stream_id);
806 if (ret) {
807 vmw_resource_unreference(&res);
808 return ret;
809 }
810
811 DRM_INFO("%s: claimed\n", __func__);
812
813 vmw_resource_activate(&stream->res, vmw_stream_destroy);
814 return 0;
815}
816
fb1d9738
JB
817static void vmw_user_stream_free(struct vmw_resource *res)
818{
819 struct vmw_user_stream *stream =
820 container_of(res, struct vmw_user_stream, stream.res);
414ee50b 821 struct vmw_private *dev_priv = res->dev_priv;
fb1d9738 822
cdad0521 823 ttm_base_object_kfree(stream, base);
414ee50b
TH
824 ttm_mem_global_free(vmw_mem_glob(dev_priv),
825 vmw_user_stream_size);
fb1d9738
JB
826}
827
828/**
829 * This function is called when user space has no more references on the
830 * base object. It releases the base-object's reference on the resource object.
831 */
832
833static void vmw_user_stream_base_release(struct ttm_base_object **p_base)
834{
835 struct ttm_base_object *base = *p_base;
836 struct vmw_user_stream *stream =
837 container_of(base, struct vmw_user_stream, base);
838 struct vmw_resource *res = &stream->stream.res;
839
840 *p_base = NULL;
841 vmw_resource_unreference(&res);
842}
843
844int vmw_stream_unref_ioctl(struct drm_device *dev, void *data,
845 struct drm_file *file_priv)
846{
847 struct vmw_private *dev_priv = vmw_priv(dev);
848 struct vmw_resource *res;
849 struct vmw_user_stream *stream;
850 struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
851 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
c0951b79 852 struct idr *idr = &dev_priv->res_idr[vmw_res_stream];
fb1d9738
JB
853 int ret = 0;
854
c0951b79
TH
855
856 res = vmw_resource_lookup(dev_priv, idr, arg->stream_id);
fb1d9738
JB
857 if (unlikely(res == NULL))
858 return -EINVAL;
859
860 if (res->res_free != &vmw_user_stream_free) {
861 ret = -EINVAL;
862 goto out;
863 }
864
865 stream = container_of(res, struct vmw_user_stream, stream.res);
866 if (stream->base.tfile != tfile) {
867 ret = -EINVAL;
868 goto out;
869 }
870
871 ttm_ref_object_base_unref(tfile, stream->base.hash.key, TTM_REF_USAGE);
872out:
873 vmw_resource_unreference(&res);
874 return ret;
875}
876
877int vmw_stream_claim_ioctl(struct drm_device *dev, void *data,
878 struct drm_file *file_priv)
879{
880 struct vmw_private *dev_priv = vmw_priv(dev);
414ee50b 881 struct vmw_user_stream *stream;
fb1d9738
JB
882 struct vmw_resource *res;
883 struct vmw_resource *tmp;
884 struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
885 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
886 int ret;
887
414ee50b
TH
888 /*
889 * Approximate idr memory usage with 128 bytes. It will be limited
890 * by maximum number_of streams anyway?
891 */
892
893 if (unlikely(vmw_user_stream_size == 0))
894 vmw_user_stream_size = ttm_round_pot(sizeof(*stream)) + 128;
895
294adf7d 896 ret = ttm_read_lock(&dev_priv->reservation_sem, true);
414ee50b
TH
897 if (unlikely(ret != 0))
898 return ret;
899
900 ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
901 vmw_user_stream_size,
902 false, true);
903 if (unlikely(ret != 0)) {
904 if (ret != -ERESTARTSYS)
905 DRM_ERROR("Out of graphics memory for stream"
906 " creation.\n");
907 goto out_unlock;
908 }
909
910
911 stream = kmalloc(sizeof(*stream), GFP_KERNEL);
912 if (unlikely(stream == NULL)) {
913 ttm_mem_global_free(vmw_mem_glob(dev_priv),
914 vmw_user_stream_size);
915 ret = -ENOMEM;
916 goto out_unlock;
917 }
fb1d9738
JB
918
919 res = &stream->stream.res;
920 stream->base.shareable = false;
921 stream->base.tfile = NULL;
922
414ee50b
TH
923 /*
924 * From here on, the destructor takes over resource freeing.
925 */
926
fb1d9738
JB
927 ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free);
928 if (unlikely(ret != 0))
414ee50b 929 goto out_unlock;
fb1d9738
JB
930
931 tmp = vmw_resource_reference(res);
932 ret = ttm_base_object_init(tfile, &stream->base, false, VMW_RES_STREAM,
933 &vmw_user_stream_base_release, NULL);
934
935 if (unlikely(ret != 0)) {
936 vmw_resource_unreference(&tmp);
937 goto out_err;
938 }
939
940 arg->stream_id = res->id;
941out_err:
942 vmw_resource_unreference(&res);
414ee50b 943out_unlock:
294adf7d 944 ttm_read_unlock(&dev_priv->reservation_sem);
fb1d9738
JB
945 return ret;
946}
947
948int vmw_user_stream_lookup(struct vmw_private *dev_priv,
949 struct ttm_object_file *tfile,
950 uint32_t *inout_id, struct vmw_resource **out)
951{
952 struct vmw_user_stream *stream;
953 struct vmw_resource *res;
954 int ret;
955
c0951b79
TH
956 res = vmw_resource_lookup(dev_priv, &dev_priv->res_idr[vmw_res_stream],
957 *inout_id);
fb1d9738
JB
958 if (unlikely(res == NULL))
959 return -EINVAL;
960
961 if (res->res_free != &vmw_user_stream_free) {
962 ret = -EINVAL;
963 goto err_ref;
964 }
965
966 stream = container_of(res, struct vmw_user_stream, stream.res);
967 if (stream->base.tfile != tfile) {
968 ret = -EPERM;
969 goto err_ref;
970 }
971
972 *inout_id = stream->stream.stream_id;
973 *out = res;
974 return 0;
975err_ref:
976 vmw_resource_unreference(&res);
977 return ret;
978}
5e1782d2
DA
979
980
d69d51d7
TH
981/**
982 * vmw_dumb_create - Create a dumb kms buffer
983 *
984 * @file_priv: Pointer to a struct drm_file identifying the caller.
985 * @dev: Pointer to the drm device.
986 * @args: Pointer to a struct drm_mode_create_dumb structure
987 *
988 * This is a driver callback for the core drm create_dumb functionality.
989 * Note that this is very similar to the vmw_dmabuf_alloc ioctl, except
990 * that the arguments have a different format.
991 */
5e1782d2
DA
992int vmw_dumb_create(struct drm_file *file_priv,
993 struct drm_device *dev,
994 struct drm_mode_create_dumb *args)
995{
996 struct vmw_private *dev_priv = vmw_priv(dev);
d69d51d7 997 struct vmw_dma_buffer *dma_buf;
5e1782d2
DA
998 int ret;
999
1000 args->pitch = args->width * ((args->bpp + 7) / 8);
1001 args->size = args->pitch * args->height;
1002
294adf7d 1003 ret = ttm_read_lock(&dev_priv->reservation_sem, true);
d69d51d7 1004 if (unlikely(ret != 0))
5e1782d2 1005 return ret;
5e1782d2 1006
d69d51d7
TH
1007 ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile,
1008 args->size, false, &args->handle,
1009 &dma_buf);
5e1782d2 1010 if (unlikely(ret != 0))
d69d51d7 1011 goto out_no_dmabuf;
5e1782d2 1012
d69d51d7 1013 vmw_dmabuf_unreference(&dma_buf);
5e1782d2 1014out_no_dmabuf:
294adf7d 1015 ttm_read_unlock(&dev_priv->reservation_sem);
5e1782d2
DA
1016 return ret;
1017}
1018
d69d51d7
TH
1019/**
1020 * vmw_dumb_map_offset - Return the address space offset of a dumb buffer
1021 *
1022 * @file_priv: Pointer to a struct drm_file identifying the caller.
1023 * @dev: Pointer to the drm device.
1024 * @handle: Handle identifying the dumb buffer.
1025 * @offset: The address space offset returned.
1026 *
1027 * This is a driver callback for the core drm dumb_map_offset functionality.
1028 */
5e1782d2
DA
1029int vmw_dumb_map_offset(struct drm_file *file_priv,
1030 struct drm_device *dev, uint32_t handle,
1031 uint64_t *offset)
1032{
1033 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
1034 struct vmw_dma_buffer *out_buf;
1035 int ret;
1036
1037 ret = vmw_user_dmabuf_lookup(tfile, handle, &out_buf);
1038 if (ret != 0)
1039 return -EINVAL;
1040
72525b3f 1041 *offset = drm_vma_node_offset_addr(&out_buf->base.vma_node);
5e1782d2
DA
1042 vmw_dmabuf_unreference(&out_buf);
1043 return 0;
1044}
1045
d69d51d7
TH
1046/**
1047 * vmw_dumb_destroy - Destroy a dumb boffer
1048 *
1049 * @file_priv: Pointer to a struct drm_file identifying the caller.
1050 * @dev: Pointer to the drm device.
1051 * @handle: Handle identifying the dumb buffer.
1052 *
1053 * This is a driver callback for the core drm dumb_destroy functionality.
1054 */
5e1782d2
DA
1055int vmw_dumb_destroy(struct drm_file *file_priv,
1056 struct drm_device *dev,
1057 uint32_t handle)
1058{
1059 return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
1060 handle, TTM_REF_USAGE);
1061}
c0951b79
TH
1062
1063/**
1064 * vmw_resource_buf_alloc - Allocate a backup buffer for a resource.
1065 *
1066 * @res: The resource for which to allocate a backup buffer.
1067 * @interruptible: Whether any sleeps during allocation should be
1068 * performed while interruptible.
1069 */
1070static int vmw_resource_buf_alloc(struct vmw_resource *res,
1071 bool interruptible)
1072{
1073 unsigned long size =
1074 (res->backup_size + PAGE_SIZE - 1) & PAGE_MASK;
1075 struct vmw_dma_buffer *backup;
1076 int ret;
1077
1078 if (likely(res->backup)) {
1079 BUG_ON(res->backup->base.num_pages * PAGE_SIZE < size);
1080 return 0;
1081 }
1082
1083 backup = kzalloc(sizeof(*backup), GFP_KERNEL);
1084 if (unlikely(backup == NULL))
1085 return -ENOMEM;
1086
1087 ret = vmw_dmabuf_init(res->dev_priv, backup, res->backup_size,
1088 res->func->backup_placement,
1089 interruptible,
1090 &vmw_dmabuf_bo_free);
1091 if (unlikely(ret != 0))
1092 goto out_no_dmabuf;
1093
1094 res->backup = backup;
1095
1096out_no_dmabuf:
1097 return ret;
1098}
1099
1100/**
1101 * vmw_resource_do_validate - Make a resource up-to-date and visible
1102 * to the device.
1103 *
1104 * @res: The resource to make visible to the device.
1105 * @val_buf: Information about a buffer possibly
1106 * containing backup data if a bind operation is needed.
1107 *
1108 * On hardware resource shortage, this function returns -EBUSY and
1109 * should be retried once resources have been freed up.
1110 */
1111static int vmw_resource_do_validate(struct vmw_resource *res,
1112 struct ttm_validate_buffer *val_buf)
1113{
1114 int ret = 0;
1115 const struct vmw_res_func *func = res->func;
1116
1117 if (unlikely(res->id == -1)) {
1118 ret = func->create(res);
1119 if (unlikely(ret != 0))
1120 return ret;
1121 }
1122
1123 if (func->bind &&
1124 ((func->needs_backup && list_empty(&res->mob_head) &&
1125 val_buf->bo != NULL) ||
1126 (!func->needs_backup && val_buf->bo != NULL))) {
1127 ret = func->bind(res, val_buf);
1128 if (unlikely(ret != 0))
1129 goto out_bind_failed;
1130 if (func->needs_backup)
1131 list_add_tail(&res->mob_head, &res->backup->res_list);
1132 }
1133
1134 /*
1135 * Only do this on write operations, and move to
1136 * vmw_resource_unreserve if it can be called after
1137 * backup buffers have been unreserved. Otherwise
1138 * sort out locking.
1139 */
1140 res->res_dirty = true;
1141
1142 return 0;
1143
1144out_bind_failed:
1145 func->destroy(res);
1146
1147 return ret;
1148}
1149
1150/**
1151 * vmw_resource_unreserve - Unreserve a resource previously reserved for
1152 * command submission.
1153 *
1154 * @res: Pointer to the struct vmw_resource to unreserve.
1155 * @new_backup: Pointer to new backup buffer if command submission
1156 * switched.
1157 * @new_backup_offset: New backup offset if @new_backup is !NULL.
1158 *
1159 * Currently unreserving a resource means putting it back on the device's
1160 * resource lru list, so that it can be evicted if necessary.
1161 */
1162void vmw_resource_unreserve(struct vmw_resource *res,
1163 struct vmw_dma_buffer *new_backup,
1164 unsigned long new_backup_offset)
1165{
1166 struct vmw_private *dev_priv = res->dev_priv;
1167
1168 if (!list_empty(&res->lru_head))
1169 return;
1170
1171 if (new_backup && new_backup != res->backup) {
1172
1173 if (res->backup) {
8bd4ce56 1174 lockdep_assert_held(&res->backup->base.resv->lock.base);
c0951b79
TH
1175 list_del_init(&res->mob_head);
1176 vmw_dmabuf_unreference(&res->backup);
1177 }
1178
1179 res->backup = vmw_dmabuf_reference(new_backup);
8bd4ce56 1180 lockdep_assert_held(&new_backup->base.resv->lock.base);
c0951b79
TH
1181 list_add_tail(&res->mob_head, &new_backup->res_list);
1182 }
1183 if (new_backup)
1184 res->backup_offset = new_backup_offset;
1185
26682480 1186 if (!res->func->may_evict || res->id == -1)
c0951b79
TH
1187 return;
1188
1189 write_lock(&dev_priv->resource_lock);
1190 list_add_tail(&res->lru_head,
1191 &res->dev_priv->res_lru[res->func->res_type]);
1192 write_unlock(&dev_priv->resource_lock);
1193}
1194
1195/**
1196 * vmw_resource_check_buffer - Check whether a backup buffer is needed
1197 * for a resource and in that case, allocate
1198 * one, reserve and validate it.
1199 *
1200 * @res: The resource for which to allocate a backup buffer.
1201 * @interruptible: Whether any sleeps during allocation should be
1202 * performed while interruptible.
1203 * @val_buf: On successful return contains data about the
1204 * reserved and validated backup buffer.
1205 */
ecff665f
ML
1206static int
1207vmw_resource_check_buffer(struct vmw_resource *res,
ecff665f
ML
1208 bool interruptible,
1209 struct ttm_validate_buffer *val_buf)
c0951b79
TH
1210{
1211 struct list_head val_list;
1212 bool backup_dirty = false;
1213 int ret;
1214
1215 if (unlikely(res->backup == NULL)) {
1216 ret = vmw_resource_buf_alloc(res, interruptible);
1217 if (unlikely(ret != 0))
1218 return ret;
1219 }
1220
1221 INIT_LIST_HEAD(&val_list);
1222 val_buf->bo = ttm_bo_reference(&res->backup->base);
ae9c0af2 1223 val_buf->shared = false;
c0951b79 1224 list_add_tail(&val_buf->head, &val_list);
58b4d720 1225 ret = ttm_eu_reserve_buffers(NULL, &val_list, interruptible);
c0951b79
TH
1226 if (unlikely(ret != 0))
1227 goto out_no_reserve;
1228
1229 if (res->func->needs_backup && list_empty(&res->mob_head))
1230 return 0;
1231
1232 backup_dirty = res->backup_dirty;
1233 ret = ttm_bo_validate(&res->backup->base,
1234 res->func->backup_placement,
97a875cb 1235 true, false);
c0951b79
TH
1236
1237 if (unlikely(ret != 0))
1238 goto out_no_validate;
1239
1240 return 0;
1241
1242out_no_validate:
ac49251b 1243 ttm_eu_backoff_reservation(NULL, &val_list);
c0951b79
TH
1244out_no_reserve:
1245 ttm_bo_unref(&val_buf->bo);
1246 if (backup_dirty)
1247 vmw_dmabuf_unreference(&res->backup);
1248
1249 return ret;
1250}
1251
1252/**
1253 * vmw_resource_reserve - Reserve a resource for command submission
1254 *
1255 * @res: The resource to reserve.
1256 *
1257 * This function takes the resource off the LRU list and make sure
1258 * a backup buffer is present for guest-backed resources. However,
1259 * the buffer may not be bound to the resource at this point.
1260 *
1261 */
1262int vmw_resource_reserve(struct vmw_resource *res, bool no_backup)
1263{
1264 struct vmw_private *dev_priv = res->dev_priv;
1265 int ret;
1266
1267 write_lock(&dev_priv->resource_lock);
1268 list_del_init(&res->lru_head);
1269 write_unlock(&dev_priv->resource_lock);
1270
1271 if (res->func->needs_backup && res->backup == NULL &&
1272 !no_backup) {
1273 ret = vmw_resource_buf_alloc(res, true);
1274 if (unlikely(ret != 0))
1275 return ret;
1276 }
1277
1278 return 0;
1279}
1280
1281/**
1282 * vmw_resource_backoff_reservation - Unreserve and unreference a
1283 * backup buffer
1284 *.
1285 * @val_buf: Backup buffer information.
1286 */
ecff665f 1287static void
ac49251b 1288vmw_resource_backoff_reservation(struct ttm_validate_buffer *val_buf)
c0951b79
TH
1289{
1290 struct list_head val_list;
1291
1292 if (likely(val_buf->bo == NULL))
1293 return;
1294
1295 INIT_LIST_HEAD(&val_list);
1296 list_add_tail(&val_buf->head, &val_list);
ac49251b 1297 ttm_eu_backoff_reservation(NULL, &val_list);
c0951b79
TH
1298 ttm_bo_unref(&val_buf->bo);
1299}
1300
1301/**
1302 * vmw_resource_do_evict - Evict a resource, and transfer its data
1303 * to a backup buffer.
1304 *
1305 * @res: The resource to evict.
ea029c28 1306 * @interruptible: Whether to wait interruptible.
c0951b79 1307 */
ea029c28 1308int vmw_resource_do_evict(struct vmw_resource *res, bool interruptible)
c0951b79
TH
1309{
1310 struct ttm_validate_buffer val_buf;
1311 const struct vmw_res_func *func = res->func;
1312 int ret;
1313
1314 BUG_ON(!func->may_evict);
1315
1316 val_buf.bo = NULL;
ae9c0af2 1317 val_buf.shared = false;
ac49251b 1318 ret = vmw_resource_check_buffer(res, interruptible, &val_buf);
c0951b79
TH
1319 if (unlikely(ret != 0))
1320 return ret;
1321
1322 if (unlikely(func->unbind != NULL &&
1323 (!func->needs_backup || !list_empty(&res->mob_head)))) {
1324 ret = func->unbind(res, res->res_dirty, &val_buf);
1325 if (unlikely(ret != 0))
1326 goto out_no_unbind;
1327 list_del_init(&res->mob_head);
1328 }
1329 ret = func->destroy(res);
1330 res->backup_dirty = true;
1331 res->res_dirty = false;
1332out_no_unbind:
ac49251b 1333 vmw_resource_backoff_reservation(&val_buf);
c0951b79
TH
1334
1335 return ret;
1336}
1337
1338
1339/**
1340 * vmw_resource_validate - Make a resource up-to-date and visible
1341 * to the device.
1342 *
1343 * @res: The resource to make visible to the device.
1344 *
1345 * On succesful return, any backup DMA buffer pointed to by @res->backup will
1346 * be reserved and validated.
1347 * On hardware resource shortage, this function will repeatedly evict
1348 * resources of the same type until the validation succeeds.
1349 */
1350int vmw_resource_validate(struct vmw_resource *res)
1351{
1352 int ret;
1353 struct vmw_resource *evict_res;
1354 struct vmw_private *dev_priv = res->dev_priv;
1355 struct list_head *lru_list = &dev_priv->res_lru[res->func->res_type];
1356 struct ttm_validate_buffer val_buf;
ea029c28 1357 unsigned err_count = 0;
c0951b79
TH
1358
1359 if (likely(!res->func->may_evict))
1360 return 0;
1361
1362 val_buf.bo = NULL;
ae9c0af2 1363 val_buf.shared = false;
c0951b79
TH
1364 if (res->backup)
1365 val_buf.bo = &res->backup->base;
1366 do {
1367 ret = vmw_resource_do_validate(res, &val_buf);
1368 if (likely(ret != -EBUSY))
1369 break;
1370
1371 write_lock(&dev_priv->resource_lock);
1372 if (list_empty(lru_list) || !res->func->may_evict) {
ea029c28 1373 DRM_ERROR("Out of device device resources "
c0951b79
TH
1374 "for %s.\n", res->func->type_name);
1375 ret = -EBUSY;
1376 write_unlock(&dev_priv->resource_lock);
1377 break;
1378 }
1379
1380 evict_res = vmw_resource_reference
1381 (list_first_entry(lru_list, struct vmw_resource,
1382 lru_head));
1383 list_del_init(&evict_res->lru_head);
1384
1385 write_unlock(&dev_priv->resource_lock);
ea029c28
TH
1386
1387 ret = vmw_resource_do_evict(evict_res, true);
1388 if (unlikely(ret != 0)) {
1389 write_lock(&dev_priv->resource_lock);
1390 list_add_tail(&evict_res->lru_head, lru_list);
1391 write_unlock(&dev_priv->resource_lock);
1392 if (ret == -ERESTARTSYS ||
1393 ++err_count > VMW_RES_EVICT_ERR_COUNT) {
1394 vmw_resource_unreference(&evict_res);
1395 goto out_no_validate;
1396 }
1397 }
1398
c0951b79
TH
1399 vmw_resource_unreference(&evict_res);
1400 } while (1);
1401
1402 if (unlikely(ret != 0))
1403 goto out_no_validate;
1404 else if (!res->func->needs_backup && res->backup) {
1405 list_del_init(&res->mob_head);
1406 vmw_dmabuf_unreference(&res->backup);
1407 }
1408
1409 return 0;
1410
1411out_no_validate:
1412 return ret;
1413}
1414
1415/**
1416 * vmw_fence_single_bo - Utility function to fence a single TTM buffer
1417 * object without unreserving it.
1418 *
1419 * @bo: Pointer to the struct ttm_buffer_object to fence.
1420 * @fence: Pointer to the fence. If NULL, this function will
1421 * insert a fence into the command stream..
1422 *
1423 * Contrary to the ttm_eu version of this function, it takes only
1424 * a single buffer object instead of a list, and it also doesn't
1425 * unreserve the buffer object, which needs to be done separately.
1426 */
1427void vmw_fence_single_bo(struct ttm_buffer_object *bo,
1428 struct vmw_fence_obj *fence)
1429{
1430 struct ttm_bo_device *bdev = bo->bdev;
f2c24b83 1431
c0951b79
TH
1432 struct vmw_private *dev_priv =
1433 container_of(bdev, struct vmw_private, bdev);
1434
2298e804 1435 if (fence == NULL) {
c0951b79 1436 vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
f2c24b83
ML
1437 reservation_object_add_excl_fence(bo->resv, &fence->base);
1438 fence_put(&fence->base);
2298e804 1439 } else
f2c24b83 1440 reservation_object_add_excl_fence(bo->resv, &fence->base);
c0951b79
TH
1441}
1442
1443/**
1444 * vmw_resource_move_notify - TTM move_notify_callback
1445 *
1446 * @bo: The TTM buffer object about to move.
1447 * @mem: The truct ttm_mem_reg indicating to what memory
1448 * region the move is taking place.
1449 *
f468911f
TH
1450 * Evicts the Guest Backed hardware resource if the backup
1451 * buffer is being moved out of MOB memory.
1452 * Note that this function should not race with the resource
1453 * validation code as long as it accesses only members of struct
1454 * resource that remain static while bo::res is !NULL and
1455 * while we have @bo reserved. struct resource::backup is *not* a
1456 * static member. The resource validation code will take care
1457 * to set @bo::res to NULL, while having @bo reserved when the
1458 * buffer is no longer bound to the resource, so @bo:res can be
1459 * used to determine whether there is a need to unbind and whether
1460 * it is safe to unbind.
c0951b79
TH
1461 */
1462void vmw_resource_move_notify(struct ttm_buffer_object *bo,
1463 struct ttm_mem_reg *mem)
1464{
f468911f
TH
1465 struct vmw_dma_buffer *dma_buf;
1466
1467 if (mem == NULL)
1468 return;
1469
1470 if (bo->destroy != vmw_dmabuf_bo_free &&
1471 bo->destroy != vmw_user_dmabuf_destroy)
1472 return;
1473
1474 dma_buf = container_of(bo, struct vmw_dma_buffer, base);
1475
1476 if (mem->mem_type != VMW_PL_MOB) {
1477 struct vmw_resource *res, *n;
f468911f
TH
1478 struct ttm_validate_buffer val_buf;
1479
1480 val_buf.bo = bo;
ae9c0af2 1481 val_buf.shared = false;
f468911f
TH
1482
1483 list_for_each_entry_safe(res, n, &dma_buf->res_list, mob_head) {
1484
1485 if (unlikely(res->func->unbind == NULL))
1486 continue;
1487
1488 (void) res->func->unbind(res, true, &val_buf);
1489 res->backup_dirty = true;
1490 res->res_dirty = false;
1491 list_del_init(&res->mob_head);
1492 }
1493
f468911f 1494 (void) ttm_bo_wait(bo, false, false, false);
f468911f 1495 }
c0951b79
TH
1496}
1497
1498/**
1499 * vmw_resource_needs_backup - Return whether a resource needs a backup buffer.
1500 *
1501 * @res: The resource being queried.
1502 */
1503bool vmw_resource_needs_backup(const struct vmw_resource *res)
1504{
1505 return res->func->needs_backup;
1506}
1507
1508/**
1509 * vmw_resource_evict_type - Evict all resources of a specific type
1510 *
1511 * @dev_priv: Pointer to a device private struct
1512 * @type: The resource type to evict
1513 *
1514 * To avoid thrashing starvation or as part of the hibernation sequence,
ea029c28 1515 * try to evict all evictable resources of a specific type.
c0951b79
TH
1516 */
1517static void vmw_resource_evict_type(struct vmw_private *dev_priv,
1518 enum vmw_res_type type)
1519{
1520 struct list_head *lru_list = &dev_priv->res_lru[type];
1521 struct vmw_resource *evict_res;
ea029c28
TH
1522 unsigned err_count = 0;
1523 int ret;
c0951b79
TH
1524
1525 do {
1526 write_lock(&dev_priv->resource_lock);
1527
1528 if (list_empty(lru_list))
1529 goto out_unlock;
1530
1531 evict_res = vmw_resource_reference(
1532 list_first_entry(lru_list, struct vmw_resource,
1533 lru_head));
1534 list_del_init(&evict_res->lru_head);
1535 write_unlock(&dev_priv->resource_lock);
ea029c28
TH
1536
1537 ret = vmw_resource_do_evict(evict_res, false);
1538 if (unlikely(ret != 0)) {
1539 write_lock(&dev_priv->resource_lock);
1540 list_add_tail(&evict_res->lru_head, lru_list);
1541 write_unlock(&dev_priv->resource_lock);
1542 if (++err_count > VMW_RES_EVICT_ERR_COUNT) {
1543 vmw_resource_unreference(&evict_res);
1544 return;
1545 }
1546 }
1547
c0951b79
TH
1548 vmw_resource_unreference(&evict_res);
1549 } while (1);
1550
1551out_unlock:
1552 write_unlock(&dev_priv->resource_lock);
1553}
1554
1555/**
1556 * vmw_resource_evict_all - Evict all evictable resources
1557 *
1558 * @dev_priv: Pointer to a device private struct
1559 *
1560 * To avoid thrashing starvation or as part of the hibernation sequence,
1561 * evict all evictable resources. In particular this means that all
1562 * guest-backed resources that are registered with the device are
1563 * evicted and the OTable becomes clean.
1564 */
1565void vmw_resource_evict_all(struct vmw_private *dev_priv)
1566{
1567 enum vmw_res_type type;
1568
1569 mutex_lock(&dev_priv->cmdbuf_mutex);
1570
1571 for (type = 0; type < vmw_res_max; ++type)
1572 vmw_resource_evict_type(dev_priv, type);
1573
1574 mutex_unlock(&dev_priv->cmdbuf_mutex);
1575}
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