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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 | 37 | struct vmw_user_dma_buffer { |
c486d4f8 | 38 | struct ttm_prime_object prime; |
fb1d9738 JB |
39 | struct vmw_dma_buffer dma; |
40 | }; | |
41 | ||
42 | struct vmw_bo_user_rep { | |
43 | uint32_t handle; | |
44 | uint64_t map_handle; | |
45 | }; | |
46 | ||
47 | struct vmw_stream { | |
48 | struct vmw_resource res; | |
49 | uint32_t stream_id; | |
50 | }; | |
51 | ||
52 | struct vmw_user_stream { | |
53 | struct ttm_base_object base; | |
54 | struct vmw_stream stream; | |
55 | }; | |
56 | ||
c0951b79 TH |
57 | |
58 | static uint64_t vmw_user_stream_size; | |
59 | ||
60 | static 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 |
72 | static inline struct vmw_dma_buffer * |
73 | vmw_dma_buffer(struct ttm_buffer_object *bo) | |
74 | { | |
75 | return container_of(bo, struct vmw_dma_buffer, base); | |
76 | } | |
77 | ||
78 | static inline struct vmw_user_dma_buffer * | |
79 | vmw_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 | ||
85 | struct vmw_resource *vmw_resource_reference(struct vmw_resource *res) | |
86 | { | |
87 | kref_get(&res->kref); | |
88 | return res; | |
89 | } | |
90 | ||
30f82d81 TH |
91 | struct vmw_resource * |
92 | vmw_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 | 104 | void 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 |
116 | static 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 | ||
164 | void 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 | 184 | int 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 |
215 | int 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 |
252 | void 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 | ||
263 | struct 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 | */ | |
296 | int 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 | ||
328 | out_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 | */ | |
339 | int 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 | */ | |
374 | static 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 |
398 | void 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 |
405 | static 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 |
412 | int 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, |
f4f4e3e3 | 433 | NULL, acc_size, NULL, NULL, bo_free); |
fb1d9738 JB |
434 | return ret; |
435 | } | |
436 | ||
fb1d9738 JB |
437 | static 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 |
454 | static 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 | */ | |
481 | int 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 | |
522 | out_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 | */ | |
533 | int 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 | */ | |
562 | static 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 | */ | |
606 | static 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 | */ | |
628 | int 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 |
680 | int 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 | 708 | out_no_dmabuf: |
294adf7d | 709 | ttm_read_unlock(&dev_priv->reservation_sem); |
fb1d9738 | 710 | |
2f5993cc | 711 | return ret; |
fb1d9738 JB |
712 | } |
713 | ||
714 | int 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 |
725 | int 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 | 754 | int 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 | ||
774 | static 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 | ||
787 | static 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 |
817 | static 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 | ||
833 | static 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 | ||
844 | int 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); | |
872 | out: | |
873 | vmw_resource_unreference(&res); | |
874 | return ret; | |
875 | } | |
876 | ||
877 | int 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); | |
ee511a83 | 903 | ttm_read_unlock(&dev_priv->reservation_sem); |
414ee50b TH |
904 | if (unlikely(ret != 0)) { |
905 | if (ret != -ERESTARTSYS) | |
906 | DRM_ERROR("Out of graphics memory for stream" | |
907 | " creation.\n"); | |
414ee50b | 908 | |
ee511a83 TH |
909 | goto out_ret; |
910 | } | |
414ee50b TH |
911 | |
912 | stream = kmalloc(sizeof(*stream), GFP_KERNEL); | |
913 | if (unlikely(stream == NULL)) { | |
914 | ttm_mem_global_free(vmw_mem_glob(dev_priv), | |
915 | vmw_user_stream_size); | |
916 | ret = -ENOMEM; | |
ee511a83 | 917 | goto out_ret; |
414ee50b | 918 | } |
fb1d9738 JB |
919 | |
920 | res = &stream->stream.res; | |
921 | stream->base.shareable = false; | |
922 | stream->base.tfile = NULL; | |
923 | ||
414ee50b TH |
924 | /* |
925 | * From here on, the destructor takes over resource freeing. | |
926 | */ | |
927 | ||
fb1d9738 JB |
928 | ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free); |
929 | if (unlikely(ret != 0)) | |
ee511a83 | 930 | goto out_ret; |
fb1d9738 JB |
931 | |
932 | tmp = vmw_resource_reference(res); | |
933 | ret = ttm_base_object_init(tfile, &stream->base, false, VMW_RES_STREAM, | |
934 | &vmw_user_stream_base_release, NULL); | |
935 | ||
936 | if (unlikely(ret != 0)) { | |
937 | vmw_resource_unreference(&tmp); | |
938 | goto out_err; | |
939 | } | |
940 | ||
941 | arg->stream_id = res->id; | |
942 | out_err: | |
943 | vmw_resource_unreference(&res); | |
ee511a83 | 944 | out_ret: |
fb1d9738 JB |
945 | return ret; |
946 | } | |
947 | ||
948 | int 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; | |
975 | err_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 |
992 | int 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 | 1014 | out_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 |
1029 | int 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 |
1055 | int 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 | */ | |
1070 | static 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 | ||
1096 | out_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 | */ | |
1111 | static 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 | ||
1144 | out_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 | */ | |
1162 | void 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 | ||
ed93394c | 1186 | if (!res->func->may_evict || res->id == -1 || res->pin_count) |
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 |
1206 | static int |
1207 | vmw_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); |
aa35071c | 1225 | ret = ttm_eu_reserve_buffers(NULL, &val_list, interruptible, NULL); |
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 | ||
1242 | out_no_validate: | |
ac49251b | 1243 | ttm_eu_backoff_reservation(NULL, &val_list); |
c0951b79 TH |
1244 | out_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 | */ | |
1262 | int 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 | 1287 | static void |
ac49251b | 1288 | vmw_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 | 1308 | int 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; | |
1332 | out_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 | */ | |
1350 | int 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 | ||
1411 | out_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 | */ | |
1427 | void 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 | */ |
1462 | void 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 | */ | |
1503 | bool 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 | */ |
1517 | static 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 | ||
1551 | out_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 | */ | |
1565 | void 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 | } | |
ed93394c TH |
1576 | |
1577 | /** | |
1578 | * vmw_resource_pin - Add a pin reference on a resource | |
1579 | * | |
1580 | * @res: The resource to add a pin reference on | |
1581 | * | |
1582 | * This function adds a pin reference, and if needed validates the resource. | |
1583 | * Having a pin reference means that the resource can never be evicted, and | |
1584 | * its id will never change as long as there is a pin reference. | |
1585 | * This function returns 0 on success and a negative error code on failure. | |
1586 | */ | |
1587 | int vmw_resource_pin(struct vmw_resource *res) | |
1588 | { | |
1589 | struct vmw_private *dev_priv = res->dev_priv; | |
1590 | int ret; | |
1591 | ||
1592 | ttm_write_lock(&dev_priv->reservation_sem, false); | |
1593 | mutex_lock(&dev_priv->cmdbuf_mutex); | |
1594 | ret = vmw_resource_reserve(res, false); | |
1595 | if (ret) | |
1596 | goto out_no_reserve; | |
1597 | ||
1598 | if (res->pin_count == 0) { | |
1599 | struct ttm_buffer_object *bo = NULL; | |
1600 | ||
1601 | if (res->backup) { | |
1602 | bo = &res->backup->base; | |
1603 | ||
1604 | ttm_bo_reserve(bo, false, false, false, NULL); | |
1605 | ret = ttm_bo_validate(bo, res->func->backup_placement, | |
1606 | false, false); | |
1607 | if (ret) { | |
1608 | ttm_bo_unreserve(bo); | |
1609 | goto out_no_validate; | |
1610 | } | |
1611 | ||
1612 | /* Do we really need to pin the MOB as well? */ | |
1613 | vmw_bo_pin(bo, true); | |
1614 | } | |
1615 | ret = vmw_resource_validate(res); | |
1616 | if (bo) | |
1617 | ttm_bo_unreserve(bo); | |
1618 | if (ret) | |
1619 | goto out_no_validate; | |
1620 | } | |
1621 | res->pin_count++; | |
1622 | ||
1623 | out_no_validate: | |
1624 | vmw_resource_unreserve(res, NULL, 0UL); | |
1625 | out_no_reserve: | |
1626 | mutex_unlock(&dev_priv->cmdbuf_mutex); | |
1627 | ttm_write_unlock(&dev_priv->reservation_sem); | |
1628 | ||
1629 | return ret; | |
1630 | } | |
1631 | ||
1632 | /** | |
1633 | * vmw_resource_unpin - Remove a pin reference from a resource | |
1634 | * | |
1635 | * @res: The resource to remove a pin reference from | |
1636 | * | |
1637 | * Having a pin reference means that the resource can never be evicted, and | |
1638 | * its id will never change as long as there is a pin reference. | |
1639 | */ | |
1640 | void vmw_resource_unpin(struct vmw_resource *res) | |
1641 | { | |
1642 | struct vmw_private *dev_priv = res->dev_priv; | |
1643 | int ret; | |
1644 | ||
1645 | ttm_read_lock(&dev_priv->reservation_sem, false); | |
1646 | mutex_lock(&dev_priv->cmdbuf_mutex); | |
1647 | ||
1648 | ret = vmw_resource_reserve(res, true); | |
1649 | WARN_ON(ret); | |
1650 | ||
1651 | WARN_ON(res->pin_count == 0); | |
1652 | if (--res->pin_count == 0 && res->backup) { | |
1653 | struct ttm_buffer_object *bo = &res->backup->base; | |
1654 | ||
1655 | ttm_bo_reserve(bo, false, false, false, NULL); | |
1656 | vmw_bo_pin(bo, false); | |
1657 | ttm_bo_unreserve(bo); | |
1658 | } | |
1659 | ||
1660 | vmw_resource_unreserve(res, NULL, 0UL); | |
1661 | ||
1662 | mutex_unlock(&dev_priv->cmdbuf_mutex); | |
1663 | ttm_read_unlock(&dev_priv->reservation_sem); | |
1664 | } |