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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 | |
b9eb1a61 | 124 | write_lock(&dev_priv->resource_lock); |
5bb39e81 | 125 | res->avail = false; |
c0951b79 | 126 | list_del_init(&res->lru_head); |
fb1d9738 | 127 | write_unlock(&dev_priv->resource_lock); |
c0951b79 TH |
128 | if (res->backup) { |
129 | struct ttm_buffer_object *bo = &res->backup->base; | |
130 | ||
ee3939e0 | 131 | ttm_bo_reserve(bo, false, false, false, NULL); |
c0951b79 TH |
132 | if (!list_empty(&res->mob_head) && |
133 | res->func->unbind != NULL) { | |
134 | struct ttm_validate_buffer val_buf; | |
135 | ||
136 | val_buf.bo = bo; | |
ae9c0af2 | 137 | val_buf.shared = false; |
c0951b79 TH |
138 | res->func->unbind(res, false, &val_buf); |
139 | } | |
140 | res->backup_dirty = false; | |
141 | list_del_init(&res->mob_head); | |
142 | ttm_bo_unreserve(bo); | |
143 | vmw_dmabuf_unreference(&res->backup); | |
144 | } | |
fb1d9738 | 145 | |
30f82d81 | 146 | if (likely(res->hw_destroy != NULL)) { |
fb1d9738 | 147 | res->hw_destroy(res); |
30f82d81 TH |
148 | mutex_lock(&dev_priv->binding_mutex); |
149 | vmw_context_binding_res_list_kill(&res->binding_head); | |
150 | mutex_unlock(&dev_priv->binding_mutex); | |
151 | } | |
fb1d9738 | 152 | |
c0951b79 | 153 | id = res->id; |
fb1d9738 JB |
154 | if (res->res_free != NULL) |
155 | res->res_free(res); | |
156 | else | |
157 | kfree(res); | |
158 | ||
159 | write_lock(&dev_priv->resource_lock); | |
5bb39e81 TH |
160 | if (id != -1) |
161 | idr_remove(idr, id); | |
b9eb1a61 | 162 | write_unlock(&dev_priv->resource_lock); |
fb1d9738 JB |
163 | } |
164 | ||
165 | void vmw_resource_unreference(struct vmw_resource **p_res) | |
166 | { | |
167 | struct vmw_resource *res = *p_res; | |
fb1d9738 JB |
168 | |
169 | *p_res = NULL; | |
fb1d9738 | 170 | kref_put(&res->kref, vmw_resource_release); |
fb1d9738 JB |
171 | } |
172 | ||
5bb39e81 TH |
173 | |
174 | /** | |
175 | * vmw_resource_alloc_id - release a resource id to the id manager. | |
176 | * | |
5bb39e81 TH |
177 | * @res: Pointer to the resource. |
178 | * | |
179 | * Allocate the lowest free resource from the resource manager, and set | |
180 | * @res->id to that id. Returns 0 on success and -ENOMEM on failure. | |
181 | */ | |
543831cf | 182 | int vmw_resource_alloc_id(struct vmw_resource *res) |
5bb39e81 | 183 | { |
c0951b79 | 184 | struct vmw_private *dev_priv = res->dev_priv; |
5bb39e81 | 185 | int ret; |
c0951b79 | 186 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
5bb39e81 TH |
187 | |
188 | BUG_ON(res->id != -1); | |
189 | ||
cc39a8fa TH |
190 | idr_preload(GFP_KERNEL); |
191 | write_lock(&dev_priv->resource_lock); | |
5bb39e81 | 192 | |
cc39a8fa TH |
193 | ret = idr_alloc(idr, res, 1, 0, GFP_NOWAIT); |
194 | if (ret >= 0) | |
195 | res->id = ret; | |
5bb39e81 | 196 | |
cc39a8fa TH |
197 | write_unlock(&dev_priv->resource_lock); |
198 | idr_preload_end(); | |
199 | return ret < 0 ? ret : 0; | |
5bb39e81 TH |
200 | } |
201 | ||
c0951b79 TH |
202 | /** |
203 | * vmw_resource_init - initialize a struct vmw_resource | |
204 | * | |
205 | * @dev_priv: Pointer to a device private struct. | |
206 | * @res: The struct vmw_resource to initialize. | |
207 | * @obj_type: Resource object type. | |
208 | * @delay_id: Boolean whether to defer device id allocation until | |
209 | * the first validation. | |
210 | * @res_free: Resource destructor. | |
211 | * @func: Resource function table. | |
212 | */ | |
543831cf TH |
213 | int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res, |
214 | bool delay_id, | |
215 | void (*res_free) (struct vmw_resource *res), | |
216 | const struct vmw_res_func *func) | |
fb1d9738 | 217 | { |
fb1d9738 JB |
218 | kref_init(&res->kref); |
219 | res->hw_destroy = NULL; | |
220 | res->res_free = res_free; | |
fb1d9738 JB |
221 | res->avail = false; |
222 | res->dev_priv = dev_priv; | |
c0951b79 TH |
223 | res->func = func; |
224 | INIT_LIST_HEAD(&res->lru_head); | |
225 | INIT_LIST_HEAD(&res->mob_head); | |
173fb7d4 | 226 | INIT_LIST_HEAD(&res->binding_head); |
5bb39e81 | 227 | res->id = -1; |
c0951b79 TH |
228 | res->backup = NULL; |
229 | res->backup_offset = 0; | |
230 | res->backup_dirty = false; | |
231 | res->res_dirty = false; | |
5bb39e81 TH |
232 | if (delay_id) |
233 | return 0; | |
234 | else | |
c0951b79 | 235 | return vmw_resource_alloc_id(res); |
fb1d9738 JB |
236 | } |
237 | ||
238 | /** | |
239 | * vmw_resource_activate | |
240 | * | |
241 | * @res: Pointer to the newly created resource | |
242 | * @hw_destroy: Destroy function. NULL if none. | |
243 | * | |
244 | * Activate a resource after the hardware has been made aware of it. | |
245 | * Set tye destroy function to @destroy. Typically this frees the | |
246 | * resource and destroys the hardware resources associated with it. | |
247 | * Activate basically means that the function vmw_resource_lookup will | |
248 | * find it. | |
249 | */ | |
543831cf TH |
250 | void vmw_resource_activate(struct vmw_resource *res, |
251 | void (*hw_destroy) (struct vmw_resource *)) | |
fb1d9738 JB |
252 | { |
253 | struct vmw_private *dev_priv = res->dev_priv; | |
254 | ||
255 | write_lock(&dev_priv->resource_lock); | |
256 | res->avail = true; | |
257 | res->hw_destroy = hw_destroy; | |
258 | write_unlock(&dev_priv->resource_lock); | |
259 | } | |
260 | ||
b9eb1a61 TH |
261 | static struct vmw_resource *vmw_resource_lookup(struct vmw_private *dev_priv, |
262 | struct idr *idr, int id) | |
fb1d9738 JB |
263 | { |
264 | struct vmw_resource *res; | |
265 | ||
266 | read_lock(&dev_priv->resource_lock); | |
267 | res = idr_find(idr, id); | |
b9eb1a61 | 268 | if (!res || !res->avail || !kref_get_unless_zero(&res->kref)) |
fb1d9738 | 269 | res = NULL; |
b9eb1a61 | 270 | |
fb1d9738 JB |
271 | read_unlock(&dev_priv->resource_lock); |
272 | ||
273 | if (unlikely(res == NULL)) | |
274 | return NULL; | |
275 | ||
276 | return res; | |
277 | } | |
278 | ||
c0951b79 TH |
279 | /** |
280 | * vmw_user_resource_lookup_handle - lookup a struct resource from a | |
281 | * TTM user-space handle and perform basic type checks | |
282 | * | |
283 | * @dev_priv: Pointer to a device private struct | |
284 | * @tfile: Pointer to a struct ttm_object_file identifying the caller | |
285 | * @handle: The TTM user-space handle | |
286 | * @converter: Pointer to an object describing the resource type | |
287 | * @p_res: On successful return the location pointed to will contain | |
288 | * a pointer to a refcounted struct vmw_resource. | |
289 | * | |
290 | * If the handle can't be found or is associated with an incorrect resource | |
291 | * type, -EINVAL will be returned. | |
292 | */ | |
293 | int vmw_user_resource_lookup_handle(struct vmw_private *dev_priv, | |
294 | struct ttm_object_file *tfile, | |
295 | uint32_t handle, | |
296 | const struct vmw_user_resource_conv | |
297 | *converter, | |
298 | struct vmw_resource **p_res) | |
fb1d9738 | 299 | { |
7a73ba74 | 300 | struct ttm_base_object *base; |
c0951b79 TH |
301 | struct vmw_resource *res; |
302 | int ret = -EINVAL; | |
fb1d9738 | 303 | |
7a73ba74 TH |
304 | base = ttm_base_object_lookup(tfile, handle); |
305 | if (unlikely(base == NULL)) | |
306 | return -EINVAL; | |
307 | ||
79e5f810 | 308 | if (unlikely(ttm_base_object_type(base) != converter->object_type)) |
c0951b79 | 309 | goto out_bad_resource; |
7a73ba74 | 310 | |
c0951b79 | 311 | res = converter->base_obj_to_res(base); |
7a73ba74 | 312 | |
c0951b79 TH |
313 | read_lock(&dev_priv->resource_lock); |
314 | if (!res->avail || res->res_free != converter->res_free) { | |
315 | read_unlock(&dev_priv->resource_lock); | |
316 | goto out_bad_resource; | |
317 | } | |
fb1d9738 | 318 | |
c0951b79 TH |
319 | kref_get(&res->kref); |
320 | read_unlock(&dev_priv->resource_lock); | |
321 | ||
322 | *p_res = res; | |
323 | ret = 0; | |
324 | ||
325 | out_bad_resource: | |
7a73ba74 | 326 | ttm_base_object_unref(&base); |
c0951b79 TH |
327 | |
328 | return ret; | |
329 | } | |
330 | ||
331 | /** | |
332 | * Helper function that looks either a surface or dmabuf. | |
333 | * | |
334 | * The pointer this pointed at by out_surf and out_buf needs to be null. | |
335 | */ | |
336 | int vmw_user_lookup_handle(struct vmw_private *dev_priv, | |
337 | struct ttm_object_file *tfile, | |
338 | uint32_t handle, | |
339 | struct vmw_surface **out_surf, | |
340 | struct vmw_dma_buffer **out_buf) | |
341 | { | |
342 | struct vmw_resource *res; | |
343 | int ret; | |
344 | ||
345 | BUG_ON(*out_surf || *out_buf); | |
346 | ||
347 | ret = vmw_user_resource_lookup_handle(dev_priv, tfile, handle, | |
348 | user_surface_converter, | |
349 | &res); | |
350 | if (!ret) { | |
351 | *out_surf = vmw_res_to_srf(res); | |
352 | return 0; | |
353 | } | |
354 | ||
355 | *out_surf = NULL; | |
356 | ret = vmw_user_dmabuf_lookup(tfile, handle, out_buf); | |
fb1d9738 JB |
357 | return ret; |
358 | } | |
359 | ||
360 | /** | |
361 | * Buffer management. | |
362 | */ | |
308d17ef TH |
363 | |
364 | /** | |
365 | * vmw_dmabuf_acc_size - Calculate the pinned memory usage of buffers | |
366 | * | |
367 | * @dev_priv: Pointer to a struct vmw_private identifying the device. | |
368 | * @size: The requested buffer size. | |
369 | * @user: Whether this is an ordinary dma buffer or a user dma buffer. | |
370 | */ | |
371 | static size_t vmw_dmabuf_acc_size(struct vmw_private *dev_priv, size_t size, | |
372 | bool user) | |
373 | { | |
374 | static size_t struct_size, user_struct_size; | |
375 | size_t num_pages = PAGE_ALIGN(size) >> PAGE_SHIFT; | |
376 | size_t page_array_size = ttm_round_pot(num_pages * sizeof(void *)); | |
377 | ||
378 | if (unlikely(struct_size == 0)) { | |
379 | size_t backend_size = ttm_round_pot(vmw_tt_size); | |
380 | ||
381 | struct_size = backend_size + | |
382 | ttm_round_pot(sizeof(struct vmw_dma_buffer)); | |
383 | user_struct_size = backend_size + | |
384 | ttm_round_pot(sizeof(struct vmw_user_dma_buffer)); | |
385 | } | |
386 | ||
387 | if (dev_priv->map_mode == vmw_dma_alloc_coherent) | |
388 | page_array_size += | |
389 | ttm_round_pot(num_pages * sizeof(dma_addr_t)); | |
390 | ||
391 | return ((user) ? user_struct_size : struct_size) + | |
392 | page_array_size; | |
393 | } | |
394 | ||
effe1105 TH |
395 | void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo) |
396 | { | |
397 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); | |
effe1105 | 398 | |
fb1d9738 JB |
399 | kfree(vmw_bo); |
400 | } | |
401 | ||
308d17ef TH |
402 | static void vmw_user_dmabuf_destroy(struct ttm_buffer_object *bo) |
403 | { | |
404 | struct vmw_user_dma_buffer *vmw_user_bo = vmw_user_dma_buffer(bo); | |
405 | ||
406 | ttm_prime_object_kfree(vmw_user_bo, prime); | |
407 | } | |
408 | ||
fb1d9738 JB |
409 | int vmw_dmabuf_init(struct vmw_private *dev_priv, |
410 | struct vmw_dma_buffer *vmw_bo, | |
411 | size_t size, struct ttm_placement *placement, | |
412 | bool interruptible, | |
413 | void (*bo_free) (struct ttm_buffer_object *bo)) | |
414 | { | |
415 | struct ttm_bo_device *bdev = &dev_priv->bdev; | |
fb1d9738 JB |
416 | size_t acc_size; |
417 | int ret; | |
308d17ef | 418 | bool user = (bo_free == &vmw_user_dmabuf_destroy); |
fb1d9738 | 419 | |
308d17ef | 420 | BUG_ON(!bo_free && (!user && (bo_free != vmw_dmabuf_bo_free))); |
fb1d9738 | 421 | |
308d17ef | 422 | acc_size = vmw_dmabuf_acc_size(dev_priv, size, user); |
fb1d9738 JB |
423 | memset(vmw_bo, 0, sizeof(*vmw_bo)); |
424 | ||
c0951b79 | 425 | INIT_LIST_HEAD(&vmw_bo->res_list); |
fb1d9738 JB |
426 | |
427 | ret = ttm_bo_init(bdev, &vmw_bo->base, size, | |
a34417f6 | 428 | ttm_bo_type_device, placement, |
0b91c4a1 | 429 | 0, interruptible, |
f4f4e3e3 | 430 | NULL, acc_size, NULL, NULL, bo_free); |
fb1d9738 JB |
431 | return ret; |
432 | } | |
433 | ||
fb1d9738 JB |
434 | static void vmw_user_dmabuf_release(struct ttm_base_object **p_base) |
435 | { | |
436 | struct vmw_user_dma_buffer *vmw_user_bo; | |
437 | struct ttm_base_object *base = *p_base; | |
438 | struct ttm_buffer_object *bo; | |
439 | ||
440 | *p_base = NULL; | |
441 | ||
442 | if (unlikely(base == NULL)) | |
443 | return; | |
444 | ||
c486d4f8 TH |
445 | vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, |
446 | prime.base); | |
fb1d9738 JB |
447 | bo = &vmw_user_bo->dma.base; |
448 | ttm_bo_unref(&bo); | |
449 | } | |
450 | ||
1d7a5cbf TH |
451 | static void vmw_user_dmabuf_ref_obj_release(struct ttm_base_object *base, |
452 | enum ttm_ref_type ref_type) | |
453 | { | |
454 | struct vmw_user_dma_buffer *user_bo; | |
455 | user_bo = container_of(base, struct vmw_user_dma_buffer, prime.base); | |
456 | ||
457 | switch (ref_type) { | |
458 | case TTM_REF_SYNCCPU_WRITE: | |
459 | ttm_bo_synccpu_write_release(&user_bo->dma.base); | |
460 | break; | |
461 | default: | |
462 | BUG(); | |
463 | } | |
464 | } | |
465 | ||
c0951b79 TH |
466 | /** |
467 | * vmw_user_dmabuf_alloc - Allocate a user dma buffer | |
468 | * | |
469 | * @dev_priv: Pointer to a struct device private. | |
470 | * @tfile: Pointer to a struct ttm_object_file on which to register the user | |
471 | * object. | |
472 | * @size: Size of the dma buffer. | |
473 | * @shareable: Boolean whether the buffer is shareable with other open files. | |
474 | * @handle: Pointer to where the handle value should be assigned. | |
475 | * @p_dma_buf: Pointer to where the refcounted struct vmw_dma_buffer pointer | |
476 | * should be assigned. | |
477 | */ | |
478 | int vmw_user_dmabuf_alloc(struct vmw_private *dev_priv, | |
479 | struct ttm_object_file *tfile, | |
480 | uint32_t size, | |
481 | bool shareable, | |
482 | uint32_t *handle, | |
483 | struct vmw_dma_buffer **p_dma_buf) | |
484 | { | |
485 | struct vmw_user_dma_buffer *user_bo; | |
486 | struct ttm_buffer_object *tmp; | |
487 | int ret; | |
488 | ||
489 | user_bo = kzalloc(sizeof(*user_bo), GFP_KERNEL); | |
490 | if (unlikely(user_bo == NULL)) { | |
491 | DRM_ERROR("Failed to allocate a buffer.\n"); | |
492 | return -ENOMEM; | |
493 | } | |
494 | ||
495 | ret = vmw_dmabuf_init(dev_priv, &user_bo->dma, size, | |
96c5f0df | 496 | (dev_priv->has_mob) ? |
6bf6bf03 | 497 | &vmw_sys_placement : |
c0951b79 TH |
498 | &vmw_vram_sys_placement, true, |
499 | &vmw_user_dmabuf_destroy); | |
500 | if (unlikely(ret != 0)) | |
501 | return ret; | |
502 | ||
503 | tmp = ttm_bo_reference(&user_bo->dma.base); | |
c486d4f8 TH |
504 | ret = ttm_prime_object_init(tfile, |
505 | size, | |
506 | &user_bo->prime, | |
507 | shareable, | |
508 | ttm_buffer_type, | |
1d7a5cbf TH |
509 | &vmw_user_dmabuf_release, |
510 | &vmw_user_dmabuf_ref_obj_release); | |
c0951b79 TH |
511 | if (unlikely(ret != 0)) { |
512 | ttm_bo_unref(&tmp); | |
513 | goto out_no_base_object; | |
514 | } | |
515 | ||
516 | *p_dma_buf = &user_bo->dma; | |
c486d4f8 | 517 | *handle = user_bo->prime.base.hash.key; |
c0951b79 TH |
518 | |
519 | out_no_base_object: | |
520 | return ret; | |
521 | } | |
522 | ||
d08a9b9c TH |
523 | /** |
524 | * vmw_user_dmabuf_verify_access - verify access permissions on this | |
525 | * buffer object. | |
526 | * | |
527 | * @bo: Pointer to the buffer object being accessed | |
528 | * @tfile: Identifying the caller. | |
529 | */ | |
530 | int vmw_user_dmabuf_verify_access(struct ttm_buffer_object *bo, | |
531 | struct ttm_object_file *tfile) | |
532 | { | |
533 | struct vmw_user_dma_buffer *vmw_user_bo; | |
534 | ||
535 | if (unlikely(bo->destroy != vmw_user_dmabuf_destroy)) | |
536 | return -EPERM; | |
537 | ||
538 | vmw_user_bo = vmw_user_dma_buffer(bo); | |
f6dfe73a TH |
539 | |
540 | /* Check that the caller has opened the object. */ | |
541 | if (likely(ttm_ref_object_exists(tfile, &vmw_user_bo->prime.base))) | |
542 | return 0; | |
543 | ||
544 | DRM_ERROR("Could not grant buffer access.\n"); | |
545 | return -EPERM; | |
d08a9b9c TH |
546 | } |
547 | ||
1d7a5cbf TH |
548 | /** |
549 | * vmw_user_dmabuf_synccpu_grab - Grab a struct vmw_user_dma_buffer for cpu | |
550 | * access, idling previous GPU operations on the buffer and optionally | |
551 | * blocking it for further command submissions. | |
552 | * | |
553 | * @user_bo: Pointer to the buffer object being grabbed for CPU access | |
554 | * @tfile: Identifying the caller. | |
555 | * @flags: Flags indicating how the grab should be performed. | |
556 | * | |
557 | * A blocking grab will be automatically released when @tfile is closed. | |
558 | */ | |
559 | static int vmw_user_dmabuf_synccpu_grab(struct vmw_user_dma_buffer *user_bo, | |
560 | struct ttm_object_file *tfile, | |
561 | uint32_t flags) | |
562 | { | |
563 | struct ttm_buffer_object *bo = &user_bo->dma.base; | |
564 | bool existed; | |
565 | int ret; | |
566 | ||
567 | if (flags & drm_vmw_synccpu_allow_cs) { | |
dd7cfd64 | 568 | bool nonblock = !!(flags & drm_vmw_synccpu_dontblock); |
5fbad992 | 569 | long lret; |
1d7a5cbf | 570 | |
5fbad992 ML |
571 | if (nonblock) |
572 | return reservation_object_test_signaled_rcu(bo->resv, true) ? 0 : -EBUSY; | |
573 | ||
574 | lret = reservation_object_wait_timeout_rcu(bo->resv, true, true, MAX_SCHEDULE_TIMEOUT); | |
575 | if (!lret) | |
576 | return -EBUSY; | |
577 | else if (lret < 0) | |
578 | return lret; | |
579 | return 0; | |
1d7a5cbf TH |
580 | } |
581 | ||
582 | ret = ttm_bo_synccpu_write_grab | |
583 | (bo, !!(flags & drm_vmw_synccpu_dontblock)); | |
584 | if (unlikely(ret != 0)) | |
585 | return ret; | |
586 | ||
587 | ret = ttm_ref_object_add(tfile, &user_bo->prime.base, | |
588 | TTM_REF_SYNCCPU_WRITE, &existed); | |
589 | if (ret != 0 || existed) | |
590 | ttm_bo_synccpu_write_release(&user_bo->dma.base); | |
591 | ||
592 | return ret; | |
593 | } | |
594 | ||
595 | /** | |
596 | * vmw_user_dmabuf_synccpu_release - Release a previous grab for CPU access, | |
597 | * and unblock command submission on the buffer if blocked. | |
598 | * | |
599 | * @handle: Handle identifying the buffer object. | |
600 | * @tfile: Identifying the caller. | |
601 | * @flags: Flags indicating the type of release. | |
602 | */ | |
603 | static int vmw_user_dmabuf_synccpu_release(uint32_t handle, | |
604 | struct ttm_object_file *tfile, | |
605 | uint32_t flags) | |
606 | { | |
607 | if (!(flags & drm_vmw_synccpu_allow_cs)) | |
608 | return ttm_ref_object_base_unref(tfile, handle, | |
609 | TTM_REF_SYNCCPU_WRITE); | |
610 | ||
611 | return 0; | |
612 | } | |
613 | ||
614 | /** | |
615 | * vmw_user_dmabuf_synccpu_release - ioctl function implementing the synccpu | |
616 | * functionality. | |
617 | * | |
618 | * @dev: Identifies the drm device. | |
619 | * @data: Pointer to the ioctl argument. | |
620 | * @file_priv: Identifies the caller. | |
621 | * | |
622 | * This function checks the ioctl arguments for validity and calls the | |
623 | * relevant synccpu functions. | |
624 | */ | |
625 | int vmw_user_dmabuf_synccpu_ioctl(struct drm_device *dev, void *data, | |
626 | struct drm_file *file_priv) | |
627 | { | |
628 | struct drm_vmw_synccpu_arg *arg = | |
629 | (struct drm_vmw_synccpu_arg *) data; | |
630 | struct vmw_dma_buffer *dma_buf; | |
631 | struct vmw_user_dma_buffer *user_bo; | |
632 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
633 | int ret; | |
634 | ||
635 | if ((arg->flags & (drm_vmw_synccpu_read | drm_vmw_synccpu_write)) == 0 | |
636 | || (arg->flags & ~(drm_vmw_synccpu_read | drm_vmw_synccpu_write | | |
637 | drm_vmw_synccpu_dontblock | | |
638 | drm_vmw_synccpu_allow_cs)) != 0) { | |
639 | DRM_ERROR("Illegal synccpu flags.\n"); | |
640 | return -EINVAL; | |
641 | } | |
642 | ||
643 | switch (arg->op) { | |
644 | case drm_vmw_synccpu_grab: | |
645 | ret = vmw_user_dmabuf_lookup(tfile, arg->handle, &dma_buf); | |
646 | if (unlikely(ret != 0)) | |
647 | return ret; | |
648 | ||
649 | user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, | |
650 | dma); | |
651 | ret = vmw_user_dmabuf_synccpu_grab(user_bo, tfile, arg->flags); | |
652 | vmw_dmabuf_unreference(&dma_buf); | |
653 | if (unlikely(ret != 0 && ret != -ERESTARTSYS && | |
654 | ret != -EBUSY)) { | |
655 | DRM_ERROR("Failed synccpu grab on handle 0x%08x.\n", | |
656 | (unsigned int) arg->handle); | |
657 | return ret; | |
658 | } | |
659 | break; | |
660 | case drm_vmw_synccpu_release: | |
661 | ret = vmw_user_dmabuf_synccpu_release(arg->handle, tfile, | |
662 | arg->flags); | |
663 | if (unlikely(ret != 0)) { | |
664 | DRM_ERROR("Failed synccpu release on handle 0x%08x.\n", | |
665 | (unsigned int) arg->handle); | |
666 | return ret; | |
667 | } | |
668 | break; | |
669 | default: | |
670 | DRM_ERROR("Invalid synccpu operation.\n"); | |
671 | return -EINVAL; | |
672 | } | |
673 | ||
674 | return 0; | |
675 | } | |
676 | ||
fb1d9738 JB |
677 | int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data, |
678 | struct drm_file *file_priv) | |
679 | { | |
680 | struct vmw_private *dev_priv = vmw_priv(dev); | |
681 | union drm_vmw_alloc_dmabuf_arg *arg = | |
682 | (union drm_vmw_alloc_dmabuf_arg *)data; | |
683 | struct drm_vmw_alloc_dmabuf_req *req = &arg->req; | |
684 | struct drm_vmw_dmabuf_rep *rep = &arg->rep; | |
c0951b79 TH |
685 | struct vmw_dma_buffer *dma_buf; |
686 | uint32_t handle; | |
fb1d9738 JB |
687 | int ret; |
688 | ||
294adf7d | 689 | ret = ttm_read_lock(&dev_priv->reservation_sem, true); |
c0951b79 | 690 | if (unlikely(ret != 0)) |
fb1d9738 | 691 | return ret; |
fb1d9738 | 692 | |
c0951b79 TH |
693 | ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile, |
694 | req->size, false, &handle, &dma_buf); | |
fb1d9738 | 695 | if (unlikely(ret != 0)) |
2f5993cc | 696 | goto out_no_dmabuf; |
fb1d9738 | 697 | |
c0951b79 | 698 | rep->handle = handle; |
72525b3f | 699 | rep->map_handle = drm_vma_node_offset_addr(&dma_buf->base.vma_node); |
c0951b79 TH |
700 | rep->cur_gmr_id = handle; |
701 | rep->cur_gmr_offset = 0; | |
702 | ||
703 | vmw_dmabuf_unreference(&dma_buf); | |
fb1d9738 | 704 | |
2f5993cc | 705 | out_no_dmabuf: |
294adf7d | 706 | ttm_read_unlock(&dev_priv->reservation_sem); |
fb1d9738 | 707 | |
2f5993cc | 708 | return ret; |
fb1d9738 JB |
709 | } |
710 | ||
711 | int vmw_dmabuf_unref_ioctl(struct drm_device *dev, void *data, | |
712 | struct drm_file *file_priv) | |
713 | { | |
714 | struct drm_vmw_unref_dmabuf_arg *arg = | |
715 | (struct drm_vmw_unref_dmabuf_arg *)data; | |
716 | ||
717 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, | |
718 | arg->handle, | |
719 | TTM_REF_USAGE); | |
720 | } | |
721 | ||
fb1d9738 JB |
722 | int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile, |
723 | uint32_t handle, struct vmw_dma_buffer **out) | |
724 | { | |
725 | struct vmw_user_dma_buffer *vmw_user_bo; | |
726 | struct ttm_base_object *base; | |
727 | ||
728 | base = ttm_base_object_lookup(tfile, handle); | |
729 | if (unlikely(base == NULL)) { | |
730 | printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n", | |
731 | (unsigned long)handle); | |
732 | return -ESRCH; | |
733 | } | |
734 | ||
c486d4f8 | 735 | if (unlikely(ttm_base_object_type(base) != ttm_buffer_type)) { |
fb1d9738 JB |
736 | ttm_base_object_unref(&base); |
737 | printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n", | |
738 | (unsigned long)handle); | |
739 | return -EINVAL; | |
740 | } | |
741 | ||
c486d4f8 TH |
742 | vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, |
743 | prime.base); | |
fb1d9738 JB |
744 | (void)ttm_bo_reference(&vmw_user_bo->dma.base); |
745 | ttm_base_object_unref(&base); | |
746 | *out = &vmw_user_bo->dma; | |
747 | ||
748 | return 0; | |
749 | } | |
750 | ||
c0951b79 | 751 | int vmw_user_dmabuf_reference(struct ttm_object_file *tfile, |
a97e2192 TH |
752 | struct vmw_dma_buffer *dma_buf, |
753 | uint32_t *handle) | |
c0951b79 TH |
754 | { |
755 | struct vmw_user_dma_buffer *user_bo; | |
756 | ||
757 | if (dma_buf->base.destroy != vmw_user_dmabuf_destroy) | |
758 | return -EINVAL; | |
759 | ||
760 | user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, dma); | |
a97e2192 TH |
761 | |
762 | *handle = user_bo->prime.base.hash.key; | |
c486d4f8 TH |
763 | return ttm_ref_object_add(tfile, &user_bo->prime.base, |
764 | TTM_REF_USAGE, NULL); | |
c0951b79 TH |
765 | } |
766 | ||
fb1d9738 | 767 | /* |
65155b37 | 768 | * Stream management |
fb1d9738 JB |
769 | */ |
770 | ||
771 | static void vmw_stream_destroy(struct vmw_resource *res) | |
772 | { | |
773 | struct vmw_private *dev_priv = res->dev_priv; | |
774 | struct vmw_stream *stream; | |
775 | int ret; | |
776 | ||
777 | DRM_INFO("%s: unref\n", __func__); | |
778 | stream = container_of(res, struct vmw_stream, res); | |
779 | ||
780 | ret = vmw_overlay_unref(dev_priv, stream->stream_id); | |
781 | WARN_ON(ret != 0); | |
782 | } | |
783 | ||
784 | static int vmw_stream_init(struct vmw_private *dev_priv, | |
785 | struct vmw_stream *stream, | |
786 | void (*res_free) (struct vmw_resource *res)) | |
787 | { | |
788 | struct vmw_resource *res = &stream->res; | |
789 | int ret; | |
790 | ||
c0951b79 TH |
791 | ret = vmw_resource_init(dev_priv, res, false, res_free, |
792 | &vmw_stream_func); | |
fb1d9738 JB |
793 | |
794 | if (unlikely(ret != 0)) { | |
795 | if (res_free == NULL) | |
796 | kfree(stream); | |
797 | else | |
798 | res_free(&stream->res); | |
799 | return ret; | |
800 | } | |
801 | ||
802 | ret = vmw_overlay_claim(dev_priv, &stream->stream_id); | |
803 | if (ret) { | |
804 | vmw_resource_unreference(&res); | |
805 | return ret; | |
806 | } | |
807 | ||
808 | DRM_INFO("%s: claimed\n", __func__); | |
809 | ||
810 | vmw_resource_activate(&stream->res, vmw_stream_destroy); | |
811 | return 0; | |
812 | } | |
813 | ||
fb1d9738 JB |
814 | static void vmw_user_stream_free(struct vmw_resource *res) |
815 | { | |
816 | struct vmw_user_stream *stream = | |
817 | container_of(res, struct vmw_user_stream, stream.res); | |
414ee50b | 818 | struct vmw_private *dev_priv = res->dev_priv; |
fb1d9738 | 819 | |
cdad0521 | 820 | ttm_base_object_kfree(stream, base); |
414ee50b TH |
821 | ttm_mem_global_free(vmw_mem_glob(dev_priv), |
822 | vmw_user_stream_size); | |
fb1d9738 JB |
823 | } |
824 | ||
825 | /** | |
826 | * This function is called when user space has no more references on the | |
827 | * base object. It releases the base-object's reference on the resource object. | |
828 | */ | |
829 | ||
830 | static void vmw_user_stream_base_release(struct ttm_base_object **p_base) | |
831 | { | |
832 | struct ttm_base_object *base = *p_base; | |
833 | struct vmw_user_stream *stream = | |
834 | container_of(base, struct vmw_user_stream, base); | |
835 | struct vmw_resource *res = &stream->stream.res; | |
836 | ||
837 | *p_base = NULL; | |
838 | vmw_resource_unreference(&res); | |
839 | } | |
840 | ||
841 | int vmw_stream_unref_ioctl(struct drm_device *dev, void *data, | |
842 | struct drm_file *file_priv) | |
843 | { | |
844 | struct vmw_private *dev_priv = vmw_priv(dev); | |
845 | struct vmw_resource *res; | |
846 | struct vmw_user_stream *stream; | |
847 | struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; | |
848 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
c0951b79 | 849 | struct idr *idr = &dev_priv->res_idr[vmw_res_stream]; |
fb1d9738 JB |
850 | int ret = 0; |
851 | ||
c0951b79 TH |
852 | |
853 | res = vmw_resource_lookup(dev_priv, idr, arg->stream_id); | |
fb1d9738 JB |
854 | if (unlikely(res == NULL)) |
855 | return -EINVAL; | |
856 | ||
857 | if (res->res_free != &vmw_user_stream_free) { | |
858 | ret = -EINVAL; | |
859 | goto out; | |
860 | } | |
861 | ||
862 | stream = container_of(res, struct vmw_user_stream, stream.res); | |
863 | if (stream->base.tfile != tfile) { | |
864 | ret = -EINVAL; | |
865 | goto out; | |
866 | } | |
867 | ||
868 | ttm_ref_object_base_unref(tfile, stream->base.hash.key, TTM_REF_USAGE); | |
869 | out: | |
870 | vmw_resource_unreference(&res); | |
871 | return ret; | |
872 | } | |
873 | ||
874 | int vmw_stream_claim_ioctl(struct drm_device *dev, void *data, | |
875 | struct drm_file *file_priv) | |
876 | { | |
877 | struct vmw_private *dev_priv = vmw_priv(dev); | |
414ee50b | 878 | struct vmw_user_stream *stream; |
fb1d9738 JB |
879 | struct vmw_resource *res; |
880 | struct vmw_resource *tmp; | |
881 | struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; | |
882 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
883 | int ret; | |
884 | ||
414ee50b TH |
885 | /* |
886 | * Approximate idr memory usage with 128 bytes. It will be limited | |
887 | * by maximum number_of streams anyway? | |
888 | */ | |
889 | ||
890 | if (unlikely(vmw_user_stream_size == 0)) | |
891 | vmw_user_stream_size = ttm_round_pot(sizeof(*stream)) + 128; | |
892 | ||
294adf7d | 893 | ret = ttm_read_lock(&dev_priv->reservation_sem, true); |
414ee50b TH |
894 | if (unlikely(ret != 0)) |
895 | return ret; | |
896 | ||
897 | ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), | |
898 | vmw_user_stream_size, | |
899 | false, true); | |
ee511a83 | 900 | ttm_read_unlock(&dev_priv->reservation_sem); |
414ee50b TH |
901 | if (unlikely(ret != 0)) { |
902 | if (ret != -ERESTARTSYS) | |
903 | DRM_ERROR("Out of graphics memory for stream" | |
904 | " creation.\n"); | |
414ee50b | 905 | |
ee511a83 TH |
906 | goto out_ret; |
907 | } | |
414ee50b TH |
908 | |
909 | stream = kmalloc(sizeof(*stream), GFP_KERNEL); | |
910 | if (unlikely(stream == NULL)) { | |
911 | ttm_mem_global_free(vmw_mem_glob(dev_priv), | |
912 | vmw_user_stream_size); | |
913 | ret = -ENOMEM; | |
ee511a83 | 914 | goto out_ret; |
414ee50b | 915 | } |
fb1d9738 JB |
916 | |
917 | res = &stream->stream.res; | |
918 | stream->base.shareable = false; | |
919 | stream->base.tfile = NULL; | |
920 | ||
414ee50b TH |
921 | /* |
922 | * From here on, the destructor takes over resource freeing. | |
923 | */ | |
924 | ||
fb1d9738 JB |
925 | ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free); |
926 | if (unlikely(ret != 0)) | |
ee511a83 | 927 | goto out_ret; |
fb1d9738 JB |
928 | |
929 | tmp = vmw_resource_reference(res); | |
930 | ret = ttm_base_object_init(tfile, &stream->base, false, VMW_RES_STREAM, | |
931 | &vmw_user_stream_base_release, NULL); | |
932 | ||
933 | if (unlikely(ret != 0)) { | |
934 | vmw_resource_unreference(&tmp); | |
935 | goto out_err; | |
936 | } | |
937 | ||
938 | arg->stream_id = res->id; | |
939 | out_err: | |
940 | vmw_resource_unreference(&res); | |
ee511a83 | 941 | out_ret: |
fb1d9738 JB |
942 | return ret; |
943 | } | |
944 | ||
945 | int vmw_user_stream_lookup(struct vmw_private *dev_priv, | |
946 | struct ttm_object_file *tfile, | |
947 | uint32_t *inout_id, struct vmw_resource **out) | |
948 | { | |
949 | struct vmw_user_stream *stream; | |
950 | struct vmw_resource *res; | |
951 | int ret; | |
952 | ||
c0951b79 TH |
953 | res = vmw_resource_lookup(dev_priv, &dev_priv->res_idr[vmw_res_stream], |
954 | *inout_id); | |
fb1d9738 JB |
955 | if (unlikely(res == NULL)) |
956 | return -EINVAL; | |
957 | ||
958 | if (res->res_free != &vmw_user_stream_free) { | |
959 | ret = -EINVAL; | |
960 | goto err_ref; | |
961 | } | |
962 | ||
963 | stream = container_of(res, struct vmw_user_stream, stream.res); | |
964 | if (stream->base.tfile != tfile) { | |
965 | ret = -EPERM; | |
966 | goto err_ref; | |
967 | } | |
968 | ||
969 | *inout_id = stream->stream.stream_id; | |
970 | *out = res; | |
971 | return 0; | |
972 | err_ref: | |
973 | vmw_resource_unreference(&res); | |
974 | return ret; | |
975 | } | |
5e1782d2 DA |
976 | |
977 | ||
d69d51d7 TH |
978 | /** |
979 | * vmw_dumb_create - Create a dumb kms buffer | |
980 | * | |
981 | * @file_priv: Pointer to a struct drm_file identifying the caller. | |
982 | * @dev: Pointer to the drm device. | |
983 | * @args: Pointer to a struct drm_mode_create_dumb structure | |
984 | * | |
985 | * This is a driver callback for the core drm create_dumb functionality. | |
986 | * Note that this is very similar to the vmw_dmabuf_alloc ioctl, except | |
987 | * that the arguments have a different format. | |
988 | */ | |
5e1782d2 DA |
989 | int vmw_dumb_create(struct drm_file *file_priv, |
990 | struct drm_device *dev, | |
991 | struct drm_mode_create_dumb *args) | |
992 | { | |
993 | struct vmw_private *dev_priv = vmw_priv(dev); | |
d69d51d7 | 994 | struct vmw_dma_buffer *dma_buf; |
5e1782d2 DA |
995 | int ret; |
996 | ||
997 | args->pitch = args->width * ((args->bpp + 7) / 8); | |
998 | args->size = args->pitch * args->height; | |
999 | ||
294adf7d | 1000 | ret = ttm_read_lock(&dev_priv->reservation_sem, true); |
d69d51d7 | 1001 | if (unlikely(ret != 0)) |
5e1782d2 | 1002 | return ret; |
5e1782d2 | 1003 | |
d69d51d7 TH |
1004 | ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile, |
1005 | args->size, false, &args->handle, | |
1006 | &dma_buf); | |
5e1782d2 | 1007 | if (unlikely(ret != 0)) |
d69d51d7 | 1008 | goto out_no_dmabuf; |
5e1782d2 | 1009 | |
d69d51d7 | 1010 | vmw_dmabuf_unreference(&dma_buf); |
5e1782d2 | 1011 | out_no_dmabuf: |
294adf7d | 1012 | ttm_read_unlock(&dev_priv->reservation_sem); |
5e1782d2 DA |
1013 | return ret; |
1014 | } | |
1015 | ||
d69d51d7 TH |
1016 | /** |
1017 | * vmw_dumb_map_offset - Return the address space offset of a dumb buffer | |
1018 | * | |
1019 | * @file_priv: Pointer to a struct drm_file identifying the caller. | |
1020 | * @dev: Pointer to the drm device. | |
1021 | * @handle: Handle identifying the dumb buffer. | |
1022 | * @offset: The address space offset returned. | |
1023 | * | |
1024 | * This is a driver callback for the core drm dumb_map_offset functionality. | |
1025 | */ | |
5e1782d2 DA |
1026 | int vmw_dumb_map_offset(struct drm_file *file_priv, |
1027 | struct drm_device *dev, uint32_t handle, | |
1028 | uint64_t *offset) | |
1029 | { | |
1030 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
1031 | struct vmw_dma_buffer *out_buf; | |
1032 | int ret; | |
1033 | ||
1034 | ret = vmw_user_dmabuf_lookup(tfile, handle, &out_buf); | |
1035 | if (ret != 0) | |
1036 | return -EINVAL; | |
1037 | ||
72525b3f | 1038 | *offset = drm_vma_node_offset_addr(&out_buf->base.vma_node); |
5e1782d2 DA |
1039 | vmw_dmabuf_unreference(&out_buf); |
1040 | return 0; | |
1041 | } | |
1042 | ||
d69d51d7 TH |
1043 | /** |
1044 | * vmw_dumb_destroy - Destroy a dumb boffer | |
1045 | * | |
1046 | * @file_priv: Pointer to a struct drm_file identifying the caller. | |
1047 | * @dev: Pointer to the drm device. | |
1048 | * @handle: Handle identifying the dumb buffer. | |
1049 | * | |
1050 | * This is a driver callback for the core drm dumb_destroy functionality. | |
1051 | */ | |
5e1782d2 DA |
1052 | int vmw_dumb_destroy(struct drm_file *file_priv, |
1053 | struct drm_device *dev, | |
1054 | uint32_t handle) | |
1055 | { | |
1056 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, | |
1057 | handle, TTM_REF_USAGE); | |
1058 | } | |
c0951b79 TH |
1059 | |
1060 | /** | |
1061 | * vmw_resource_buf_alloc - Allocate a backup buffer for a resource. | |
1062 | * | |
1063 | * @res: The resource for which to allocate a backup buffer. | |
1064 | * @interruptible: Whether any sleeps during allocation should be | |
1065 | * performed while interruptible. | |
1066 | */ | |
1067 | static int vmw_resource_buf_alloc(struct vmw_resource *res, | |
1068 | bool interruptible) | |
1069 | { | |
1070 | unsigned long size = | |
1071 | (res->backup_size + PAGE_SIZE - 1) & PAGE_MASK; | |
1072 | struct vmw_dma_buffer *backup; | |
1073 | int ret; | |
1074 | ||
1075 | if (likely(res->backup)) { | |
1076 | BUG_ON(res->backup->base.num_pages * PAGE_SIZE < size); | |
1077 | return 0; | |
1078 | } | |
1079 | ||
1080 | backup = kzalloc(sizeof(*backup), GFP_KERNEL); | |
1081 | if (unlikely(backup == NULL)) | |
1082 | return -ENOMEM; | |
1083 | ||
1084 | ret = vmw_dmabuf_init(res->dev_priv, backup, res->backup_size, | |
1085 | res->func->backup_placement, | |
1086 | interruptible, | |
1087 | &vmw_dmabuf_bo_free); | |
1088 | if (unlikely(ret != 0)) | |
1089 | goto out_no_dmabuf; | |
1090 | ||
1091 | res->backup = backup; | |
1092 | ||
1093 | out_no_dmabuf: | |
1094 | return ret; | |
1095 | } | |
1096 | ||
1097 | /** | |
1098 | * vmw_resource_do_validate - Make a resource up-to-date and visible | |
1099 | * to the device. | |
1100 | * | |
1101 | * @res: The resource to make visible to the device. | |
1102 | * @val_buf: Information about a buffer possibly | |
1103 | * containing backup data if a bind operation is needed. | |
1104 | * | |
1105 | * On hardware resource shortage, this function returns -EBUSY and | |
1106 | * should be retried once resources have been freed up. | |
1107 | */ | |
1108 | static int vmw_resource_do_validate(struct vmw_resource *res, | |
1109 | struct ttm_validate_buffer *val_buf) | |
1110 | { | |
1111 | int ret = 0; | |
1112 | const struct vmw_res_func *func = res->func; | |
1113 | ||
1114 | if (unlikely(res->id == -1)) { | |
1115 | ret = func->create(res); | |
1116 | if (unlikely(ret != 0)) | |
1117 | return ret; | |
1118 | } | |
1119 | ||
1120 | if (func->bind && | |
1121 | ((func->needs_backup && list_empty(&res->mob_head) && | |
1122 | val_buf->bo != NULL) || | |
1123 | (!func->needs_backup && val_buf->bo != NULL))) { | |
1124 | ret = func->bind(res, val_buf); | |
1125 | if (unlikely(ret != 0)) | |
1126 | goto out_bind_failed; | |
1127 | if (func->needs_backup) | |
1128 | list_add_tail(&res->mob_head, &res->backup->res_list); | |
1129 | } | |
1130 | ||
1131 | /* | |
1132 | * Only do this on write operations, and move to | |
1133 | * vmw_resource_unreserve if it can be called after | |
1134 | * backup buffers have been unreserved. Otherwise | |
1135 | * sort out locking. | |
1136 | */ | |
1137 | res->res_dirty = true; | |
1138 | ||
1139 | return 0; | |
1140 | ||
1141 | out_bind_failed: | |
1142 | func->destroy(res); | |
1143 | ||
1144 | return ret; | |
1145 | } | |
1146 | ||
1147 | /** | |
1148 | * vmw_resource_unreserve - Unreserve a resource previously reserved for | |
1149 | * command submission. | |
1150 | * | |
1151 | * @res: Pointer to the struct vmw_resource to unreserve. | |
1152 | * @new_backup: Pointer to new backup buffer if command submission | |
1153 | * switched. | |
1154 | * @new_backup_offset: New backup offset if @new_backup is !NULL. | |
1155 | * | |
1156 | * Currently unreserving a resource means putting it back on the device's | |
1157 | * resource lru list, so that it can be evicted if necessary. | |
1158 | */ | |
1159 | void vmw_resource_unreserve(struct vmw_resource *res, | |
1160 | struct vmw_dma_buffer *new_backup, | |
1161 | unsigned long new_backup_offset) | |
1162 | { | |
1163 | struct vmw_private *dev_priv = res->dev_priv; | |
1164 | ||
1165 | if (!list_empty(&res->lru_head)) | |
1166 | return; | |
1167 | ||
1168 | if (new_backup && new_backup != res->backup) { | |
1169 | ||
1170 | if (res->backup) { | |
8bd4ce56 | 1171 | lockdep_assert_held(&res->backup->base.resv->lock.base); |
c0951b79 TH |
1172 | list_del_init(&res->mob_head); |
1173 | vmw_dmabuf_unreference(&res->backup); | |
1174 | } | |
1175 | ||
1176 | res->backup = vmw_dmabuf_reference(new_backup); | |
8bd4ce56 | 1177 | lockdep_assert_held(&new_backup->base.resv->lock.base); |
c0951b79 TH |
1178 | list_add_tail(&res->mob_head, &new_backup->res_list); |
1179 | } | |
1180 | if (new_backup) | |
1181 | res->backup_offset = new_backup_offset; | |
1182 | ||
ed93394c | 1183 | if (!res->func->may_evict || res->id == -1 || res->pin_count) |
c0951b79 TH |
1184 | return; |
1185 | ||
1186 | write_lock(&dev_priv->resource_lock); | |
1187 | list_add_tail(&res->lru_head, | |
1188 | &res->dev_priv->res_lru[res->func->res_type]); | |
1189 | write_unlock(&dev_priv->resource_lock); | |
1190 | } | |
1191 | ||
1192 | /** | |
1193 | * vmw_resource_check_buffer - Check whether a backup buffer is needed | |
1194 | * for a resource and in that case, allocate | |
1195 | * one, reserve and validate it. | |
1196 | * | |
1197 | * @res: The resource for which to allocate a backup buffer. | |
1198 | * @interruptible: Whether any sleeps during allocation should be | |
1199 | * performed while interruptible. | |
1200 | * @val_buf: On successful return contains data about the | |
1201 | * reserved and validated backup buffer. | |
1202 | */ | |
ecff665f ML |
1203 | static int |
1204 | vmw_resource_check_buffer(struct vmw_resource *res, | |
ecff665f ML |
1205 | bool interruptible, |
1206 | struct ttm_validate_buffer *val_buf) | |
c0951b79 TH |
1207 | { |
1208 | struct list_head val_list; | |
1209 | bool backup_dirty = false; | |
1210 | int ret; | |
1211 | ||
1212 | if (unlikely(res->backup == NULL)) { | |
1213 | ret = vmw_resource_buf_alloc(res, interruptible); | |
1214 | if (unlikely(ret != 0)) | |
1215 | return ret; | |
1216 | } | |
1217 | ||
1218 | INIT_LIST_HEAD(&val_list); | |
1219 | val_buf->bo = ttm_bo_reference(&res->backup->base); | |
ae9c0af2 | 1220 | val_buf->shared = false; |
c0951b79 | 1221 | list_add_tail(&val_buf->head, &val_list); |
aa35071c | 1222 | ret = ttm_eu_reserve_buffers(NULL, &val_list, interruptible, NULL); |
c0951b79 TH |
1223 | if (unlikely(ret != 0)) |
1224 | goto out_no_reserve; | |
1225 | ||
1226 | if (res->func->needs_backup && list_empty(&res->mob_head)) | |
1227 | return 0; | |
1228 | ||
1229 | backup_dirty = res->backup_dirty; | |
1230 | ret = ttm_bo_validate(&res->backup->base, | |
1231 | res->func->backup_placement, | |
97a875cb | 1232 | true, false); |
c0951b79 TH |
1233 | |
1234 | if (unlikely(ret != 0)) | |
1235 | goto out_no_validate; | |
1236 | ||
1237 | return 0; | |
1238 | ||
1239 | out_no_validate: | |
ac49251b | 1240 | ttm_eu_backoff_reservation(NULL, &val_list); |
c0951b79 TH |
1241 | out_no_reserve: |
1242 | ttm_bo_unref(&val_buf->bo); | |
1243 | if (backup_dirty) | |
1244 | vmw_dmabuf_unreference(&res->backup); | |
1245 | ||
1246 | return ret; | |
1247 | } | |
1248 | ||
1249 | /** | |
1250 | * vmw_resource_reserve - Reserve a resource for command submission | |
1251 | * | |
1252 | * @res: The resource to reserve. | |
1253 | * | |
1254 | * This function takes the resource off the LRU list and make sure | |
1255 | * a backup buffer is present for guest-backed resources. However, | |
1256 | * the buffer may not be bound to the resource at this point. | |
1257 | * | |
1258 | */ | |
1a4b172a TH |
1259 | int vmw_resource_reserve(struct vmw_resource *res, bool interruptible, |
1260 | bool no_backup) | |
c0951b79 TH |
1261 | { |
1262 | struct vmw_private *dev_priv = res->dev_priv; | |
1263 | int ret; | |
1264 | ||
1265 | write_lock(&dev_priv->resource_lock); | |
1266 | list_del_init(&res->lru_head); | |
1267 | write_unlock(&dev_priv->resource_lock); | |
1268 | ||
1269 | if (res->func->needs_backup && res->backup == NULL && | |
1270 | !no_backup) { | |
1a4b172a | 1271 | ret = vmw_resource_buf_alloc(res, interruptible); |
c0951b79 TH |
1272 | if (unlikely(ret != 0)) |
1273 | return ret; | |
1274 | } | |
1275 | ||
1276 | return 0; | |
1277 | } | |
1278 | ||
1279 | /** | |
1280 | * vmw_resource_backoff_reservation - Unreserve and unreference a | |
1281 | * backup buffer | |
1282 | *. | |
1283 | * @val_buf: Backup buffer information. | |
1284 | */ | |
ecff665f | 1285 | static void |
ac49251b | 1286 | vmw_resource_backoff_reservation(struct ttm_validate_buffer *val_buf) |
c0951b79 TH |
1287 | { |
1288 | struct list_head val_list; | |
1289 | ||
1290 | if (likely(val_buf->bo == NULL)) | |
1291 | return; | |
1292 | ||
1293 | INIT_LIST_HEAD(&val_list); | |
1294 | list_add_tail(&val_buf->head, &val_list); | |
ac49251b | 1295 | ttm_eu_backoff_reservation(NULL, &val_list); |
c0951b79 TH |
1296 | ttm_bo_unref(&val_buf->bo); |
1297 | } | |
1298 | ||
1299 | /** | |
1300 | * vmw_resource_do_evict - Evict a resource, and transfer its data | |
1301 | * to a backup buffer. | |
1302 | * | |
1303 | * @res: The resource to evict. | |
ea029c28 | 1304 | * @interruptible: Whether to wait interruptible. |
c0951b79 | 1305 | */ |
b9eb1a61 | 1306 | static int vmw_resource_do_evict(struct vmw_resource *res, bool interruptible) |
c0951b79 TH |
1307 | { |
1308 | struct ttm_validate_buffer val_buf; | |
1309 | const struct vmw_res_func *func = res->func; | |
1310 | int ret; | |
1311 | ||
1312 | BUG_ON(!func->may_evict); | |
1313 | ||
1314 | val_buf.bo = NULL; | |
ae9c0af2 | 1315 | val_buf.shared = false; |
ac49251b | 1316 | ret = vmw_resource_check_buffer(res, interruptible, &val_buf); |
c0951b79 TH |
1317 | if (unlikely(ret != 0)) |
1318 | return ret; | |
1319 | ||
1320 | if (unlikely(func->unbind != NULL && | |
1321 | (!func->needs_backup || !list_empty(&res->mob_head)))) { | |
1322 | ret = func->unbind(res, res->res_dirty, &val_buf); | |
1323 | if (unlikely(ret != 0)) | |
1324 | goto out_no_unbind; | |
1325 | list_del_init(&res->mob_head); | |
1326 | } | |
1327 | ret = func->destroy(res); | |
1328 | res->backup_dirty = true; | |
1329 | res->res_dirty = false; | |
1330 | out_no_unbind: | |
ac49251b | 1331 | vmw_resource_backoff_reservation(&val_buf); |
c0951b79 TH |
1332 | |
1333 | return ret; | |
1334 | } | |
1335 | ||
1336 | ||
1337 | /** | |
1338 | * vmw_resource_validate - Make a resource up-to-date and visible | |
1339 | * to the device. | |
1340 | * | |
1341 | * @res: The resource to make visible to the device. | |
1342 | * | |
1343 | * On succesful return, any backup DMA buffer pointed to by @res->backup will | |
1344 | * be reserved and validated. | |
1345 | * On hardware resource shortage, this function will repeatedly evict | |
1346 | * resources of the same type until the validation succeeds. | |
1347 | */ | |
1348 | int vmw_resource_validate(struct vmw_resource *res) | |
1349 | { | |
1350 | int ret; | |
1351 | struct vmw_resource *evict_res; | |
1352 | struct vmw_private *dev_priv = res->dev_priv; | |
1353 | struct list_head *lru_list = &dev_priv->res_lru[res->func->res_type]; | |
1354 | struct ttm_validate_buffer val_buf; | |
ea029c28 | 1355 | unsigned err_count = 0; |
c0951b79 TH |
1356 | |
1357 | if (likely(!res->func->may_evict)) | |
1358 | return 0; | |
1359 | ||
1360 | val_buf.bo = NULL; | |
ae9c0af2 | 1361 | val_buf.shared = false; |
c0951b79 TH |
1362 | if (res->backup) |
1363 | val_buf.bo = &res->backup->base; | |
1364 | do { | |
1365 | ret = vmw_resource_do_validate(res, &val_buf); | |
1366 | if (likely(ret != -EBUSY)) | |
1367 | break; | |
1368 | ||
1369 | write_lock(&dev_priv->resource_lock); | |
1370 | if (list_empty(lru_list) || !res->func->may_evict) { | |
ea029c28 | 1371 | DRM_ERROR("Out of device device resources " |
c0951b79 TH |
1372 | "for %s.\n", res->func->type_name); |
1373 | ret = -EBUSY; | |
1374 | write_unlock(&dev_priv->resource_lock); | |
1375 | break; | |
1376 | } | |
1377 | ||
1378 | evict_res = vmw_resource_reference | |
1379 | (list_first_entry(lru_list, struct vmw_resource, | |
1380 | lru_head)); | |
1381 | list_del_init(&evict_res->lru_head); | |
1382 | ||
1383 | write_unlock(&dev_priv->resource_lock); | |
ea029c28 TH |
1384 | |
1385 | ret = vmw_resource_do_evict(evict_res, true); | |
1386 | if (unlikely(ret != 0)) { | |
1387 | write_lock(&dev_priv->resource_lock); | |
1388 | list_add_tail(&evict_res->lru_head, lru_list); | |
1389 | write_unlock(&dev_priv->resource_lock); | |
1390 | if (ret == -ERESTARTSYS || | |
1391 | ++err_count > VMW_RES_EVICT_ERR_COUNT) { | |
1392 | vmw_resource_unreference(&evict_res); | |
1393 | goto out_no_validate; | |
1394 | } | |
1395 | } | |
1396 | ||
c0951b79 TH |
1397 | vmw_resource_unreference(&evict_res); |
1398 | } while (1); | |
1399 | ||
1400 | if (unlikely(ret != 0)) | |
1401 | goto out_no_validate; | |
1402 | else if (!res->func->needs_backup && res->backup) { | |
1403 | list_del_init(&res->mob_head); | |
1404 | vmw_dmabuf_unreference(&res->backup); | |
1405 | } | |
1406 | ||
1407 | return 0; | |
1408 | ||
1409 | out_no_validate: | |
1410 | return ret; | |
1411 | } | |
1412 | ||
1413 | /** | |
1414 | * vmw_fence_single_bo - Utility function to fence a single TTM buffer | |
1415 | * object without unreserving it. | |
1416 | * | |
1417 | * @bo: Pointer to the struct ttm_buffer_object to fence. | |
1418 | * @fence: Pointer to the fence. If NULL, this function will | |
1419 | * insert a fence into the command stream.. | |
1420 | * | |
1421 | * Contrary to the ttm_eu version of this function, it takes only | |
1422 | * a single buffer object instead of a list, and it also doesn't | |
1423 | * unreserve the buffer object, which needs to be done separately. | |
1424 | */ | |
1425 | void vmw_fence_single_bo(struct ttm_buffer_object *bo, | |
1426 | struct vmw_fence_obj *fence) | |
1427 | { | |
1428 | struct ttm_bo_device *bdev = bo->bdev; | |
f2c24b83 | 1429 | |
c0951b79 TH |
1430 | struct vmw_private *dev_priv = |
1431 | container_of(bdev, struct vmw_private, bdev); | |
1432 | ||
2298e804 | 1433 | if (fence == NULL) { |
c0951b79 | 1434 | vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL); |
f2c24b83 ML |
1435 | reservation_object_add_excl_fence(bo->resv, &fence->base); |
1436 | fence_put(&fence->base); | |
2298e804 | 1437 | } else |
f2c24b83 | 1438 | reservation_object_add_excl_fence(bo->resv, &fence->base); |
c0951b79 TH |
1439 | } |
1440 | ||
1441 | /** | |
1442 | * vmw_resource_move_notify - TTM move_notify_callback | |
1443 | * | |
1444 | * @bo: The TTM buffer object about to move. | |
1445 | * @mem: The truct ttm_mem_reg indicating to what memory | |
1446 | * region the move is taking place. | |
1447 | * | |
f468911f TH |
1448 | * Evicts the Guest Backed hardware resource if the backup |
1449 | * buffer is being moved out of MOB memory. | |
1450 | * Note that this function should not race with the resource | |
1451 | * validation code as long as it accesses only members of struct | |
1452 | * resource that remain static while bo::res is !NULL and | |
1453 | * while we have @bo reserved. struct resource::backup is *not* a | |
1454 | * static member. The resource validation code will take care | |
1455 | * to set @bo::res to NULL, while having @bo reserved when the | |
1456 | * buffer is no longer bound to the resource, so @bo:res can be | |
1457 | * used to determine whether there is a need to unbind and whether | |
1458 | * it is safe to unbind. | |
c0951b79 TH |
1459 | */ |
1460 | void vmw_resource_move_notify(struct ttm_buffer_object *bo, | |
1461 | struct ttm_mem_reg *mem) | |
1462 | { | |
f468911f TH |
1463 | struct vmw_dma_buffer *dma_buf; |
1464 | ||
1465 | if (mem == NULL) | |
1466 | return; | |
1467 | ||
1468 | if (bo->destroy != vmw_dmabuf_bo_free && | |
1469 | bo->destroy != vmw_user_dmabuf_destroy) | |
1470 | return; | |
1471 | ||
1472 | dma_buf = container_of(bo, struct vmw_dma_buffer, base); | |
1473 | ||
1474 | if (mem->mem_type != VMW_PL_MOB) { | |
1475 | struct vmw_resource *res, *n; | |
f468911f TH |
1476 | struct ttm_validate_buffer val_buf; |
1477 | ||
1478 | val_buf.bo = bo; | |
ae9c0af2 | 1479 | val_buf.shared = false; |
f468911f TH |
1480 | |
1481 | list_for_each_entry_safe(res, n, &dma_buf->res_list, mob_head) { | |
1482 | ||
1483 | if (unlikely(res->func->unbind == NULL)) | |
1484 | continue; | |
1485 | ||
1486 | (void) res->func->unbind(res, true, &val_buf); | |
1487 | res->backup_dirty = true; | |
1488 | res->res_dirty = false; | |
1489 | list_del_init(&res->mob_head); | |
1490 | } | |
1491 | ||
f468911f | 1492 | (void) ttm_bo_wait(bo, false, false, false); |
f468911f | 1493 | } |
c0951b79 TH |
1494 | } |
1495 | ||
1496 | /** | |
1497 | * vmw_resource_needs_backup - Return whether a resource needs a backup buffer. | |
1498 | * | |
1499 | * @res: The resource being queried. | |
1500 | */ | |
1501 | bool vmw_resource_needs_backup(const struct vmw_resource *res) | |
1502 | { | |
1503 | return res->func->needs_backup; | |
1504 | } | |
1505 | ||
1506 | /** | |
1507 | * vmw_resource_evict_type - Evict all resources of a specific type | |
1508 | * | |
1509 | * @dev_priv: Pointer to a device private struct | |
1510 | * @type: The resource type to evict | |
1511 | * | |
1512 | * To avoid thrashing starvation or as part of the hibernation sequence, | |
ea029c28 | 1513 | * try to evict all evictable resources of a specific type. |
c0951b79 TH |
1514 | */ |
1515 | static void vmw_resource_evict_type(struct vmw_private *dev_priv, | |
1516 | enum vmw_res_type type) | |
1517 | { | |
1518 | struct list_head *lru_list = &dev_priv->res_lru[type]; | |
1519 | struct vmw_resource *evict_res; | |
ea029c28 TH |
1520 | unsigned err_count = 0; |
1521 | int ret; | |
c0951b79 TH |
1522 | |
1523 | do { | |
1524 | write_lock(&dev_priv->resource_lock); | |
1525 | ||
1526 | if (list_empty(lru_list)) | |
1527 | goto out_unlock; | |
1528 | ||
1529 | evict_res = vmw_resource_reference( | |
1530 | list_first_entry(lru_list, struct vmw_resource, | |
1531 | lru_head)); | |
1532 | list_del_init(&evict_res->lru_head); | |
1533 | write_unlock(&dev_priv->resource_lock); | |
ea029c28 TH |
1534 | |
1535 | ret = vmw_resource_do_evict(evict_res, false); | |
1536 | if (unlikely(ret != 0)) { | |
1537 | write_lock(&dev_priv->resource_lock); | |
1538 | list_add_tail(&evict_res->lru_head, lru_list); | |
1539 | write_unlock(&dev_priv->resource_lock); | |
1540 | if (++err_count > VMW_RES_EVICT_ERR_COUNT) { | |
1541 | vmw_resource_unreference(&evict_res); | |
1542 | return; | |
1543 | } | |
1544 | } | |
1545 | ||
c0951b79 TH |
1546 | vmw_resource_unreference(&evict_res); |
1547 | } while (1); | |
1548 | ||
1549 | out_unlock: | |
1550 | write_unlock(&dev_priv->resource_lock); | |
1551 | } | |
1552 | ||
1553 | /** | |
1554 | * vmw_resource_evict_all - Evict all evictable resources | |
1555 | * | |
1556 | * @dev_priv: Pointer to a device private struct | |
1557 | * | |
1558 | * To avoid thrashing starvation or as part of the hibernation sequence, | |
1559 | * evict all evictable resources. In particular this means that all | |
1560 | * guest-backed resources that are registered with the device are | |
1561 | * evicted and the OTable becomes clean. | |
1562 | */ | |
1563 | void vmw_resource_evict_all(struct vmw_private *dev_priv) | |
1564 | { | |
1565 | enum vmw_res_type type; | |
1566 | ||
1567 | mutex_lock(&dev_priv->cmdbuf_mutex); | |
1568 | ||
1569 | for (type = 0; type < vmw_res_max; ++type) | |
1570 | vmw_resource_evict_type(dev_priv, type); | |
1571 | ||
1572 | mutex_unlock(&dev_priv->cmdbuf_mutex); | |
1573 | } | |
ed93394c TH |
1574 | |
1575 | /** | |
1576 | * vmw_resource_pin - Add a pin reference on a resource | |
1577 | * | |
1578 | * @res: The resource to add a pin reference on | |
1579 | * | |
1580 | * This function adds a pin reference, and if needed validates the resource. | |
1581 | * Having a pin reference means that the resource can never be evicted, and | |
1582 | * its id will never change as long as there is a pin reference. | |
1583 | * This function returns 0 on success and a negative error code on failure. | |
1584 | */ | |
1a4b172a | 1585 | int vmw_resource_pin(struct vmw_resource *res, bool interruptible) |
ed93394c TH |
1586 | { |
1587 | struct vmw_private *dev_priv = res->dev_priv; | |
1588 | int ret; | |
1589 | ||
1a4b172a | 1590 | ttm_write_lock(&dev_priv->reservation_sem, interruptible); |
ed93394c | 1591 | mutex_lock(&dev_priv->cmdbuf_mutex); |
1a4b172a | 1592 | ret = vmw_resource_reserve(res, interruptible, false); |
ed93394c TH |
1593 | if (ret) |
1594 | goto out_no_reserve; | |
1595 | ||
1596 | if (res->pin_count == 0) { | |
459d0fa7 | 1597 | struct vmw_dma_buffer *vbo = NULL; |
ed93394c TH |
1598 | |
1599 | if (res->backup) { | |
459d0fa7 TH |
1600 | vbo = res->backup; |
1601 | ||
1a4b172a TH |
1602 | ttm_bo_reserve(&vbo->base, interruptible, false, false, |
1603 | NULL); | |
459d0fa7 TH |
1604 | if (!vbo->pin_count) { |
1605 | ret = ttm_bo_validate | |
1606 | (&vbo->base, | |
1607 | res->func->backup_placement, | |
1a4b172a | 1608 | interruptible, false); |
459d0fa7 TH |
1609 | if (ret) { |
1610 | ttm_bo_unreserve(&vbo->base); | |
1611 | goto out_no_validate; | |
1612 | } | |
ed93394c TH |
1613 | } |
1614 | ||
1615 | /* Do we really need to pin the MOB as well? */ | |
459d0fa7 | 1616 | vmw_bo_pin_reserved(vbo, true); |
ed93394c TH |
1617 | } |
1618 | ret = vmw_resource_validate(res); | |
459d0fa7 TH |
1619 | if (vbo) |
1620 | ttm_bo_unreserve(&vbo->base); | |
ed93394c TH |
1621 | if (ret) |
1622 | goto out_no_validate; | |
1623 | } | |
1624 | res->pin_count++; | |
1625 | ||
1626 | out_no_validate: | |
1627 | vmw_resource_unreserve(res, NULL, 0UL); | |
1628 | out_no_reserve: | |
1629 | mutex_unlock(&dev_priv->cmdbuf_mutex); | |
1630 | ttm_write_unlock(&dev_priv->reservation_sem); | |
1631 | ||
1632 | return ret; | |
1633 | } | |
1634 | ||
1635 | /** | |
1636 | * vmw_resource_unpin - Remove a pin reference from a resource | |
1637 | * | |
1638 | * @res: The resource to remove a pin reference from | |
1639 | * | |
1640 | * Having a pin reference means that the resource can never be evicted, and | |
1641 | * its id will never change as long as there is a pin reference. | |
1642 | */ | |
1643 | void vmw_resource_unpin(struct vmw_resource *res) | |
1644 | { | |
1645 | struct vmw_private *dev_priv = res->dev_priv; | |
1646 | int ret; | |
1647 | ||
1648 | ttm_read_lock(&dev_priv->reservation_sem, false); | |
1649 | mutex_lock(&dev_priv->cmdbuf_mutex); | |
1650 | ||
1a4b172a | 1651 | ret = vmw_resource_reserve(res, false, true); |
ed93394c TH |
1652 | WARN_ON(ret); |
1653 | ||
1654 | WARN_ON(res->pin_count == 0); | |
1655 | if (--res->pin_count == 0 && res->backup) { | |
459d0fa7 | 1656 | struct vmw_dma_buffer *vbo = res->backup; |
ed93394c | 1657 | |
459d0fa7 TH |
1658 | ttm_bo_reserve(&vbo->base, false, false, false, NULL); |
1659 | vmw_bo_pin_reserved(vbo, false); | |
1660 | ttm_bo_unreserve(&vbo->base); | |
ed93394c TH |
1661 | } |
1662 | ||
1663 | vmw_resource_unreserve(res, NULL, 0UL); | |
1664 | ||
1665 | mutex_unlock(&dev_priv->cmdbuf_mutex); | |
1666 | ttm_read_unlock(&dev_priv->reservation_sem); | |
1667 | } |