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