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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 JB |
34 | |
35 | struct vmw_user_dma_buffer { | |
36 | struct ttm_base_object base; | |
37 | struct vmw_dma_buffer dma; | |
38 | }; | |
39 | ||
40 | struct vmw_bo_user_rep { | |
41 | uint32_t handle; | |
42 | uint64_t map_handle; | |
43 | }; | |
44 | ||
45 | struct vmw_stream { | |
46 | struct vmw_resource res; | |
47 | uint32_t stream_id; | |
48 | }; | |
49 | ||
50 | struct vmw_user_stream { | |
51 | struct ttm_base_object base; | |
52 | struct vmw_stream stream; | |
53 | }; | |
54 | ||
c0951b79 TH |
55 | |
56 | static uint64_t vmw_user_stream_size; | |
57 | ||
58 | static const struct vmw_res_func vmw_stream_func = { | |
59 | .res_type = vmw_res_stream, | |
60 | .needs_backup = false, | |
61 | .may_evict = false, | |
62 | .type_name = "video streams", | |
63 | .backup_placement = NULL, | |
64 | .create = NULL, | |
65 | .destroy = NULL, | |
66 | .bind = NULL, | |
67 | .unbind = NULL | |
68 | }; | |
69 | ||
fb1d9738 JB |
70 | static inline struct vmw_dma_buffer * |
71 | vmw_dma_buffer(struct ttm_buffer_object *bo) | |
72 | { | |
73 | return container_of(bo, struct vmw_dma_buffer, base); | |
74 | } | |
75 | ||
76 | static inline struct vmw_user_dma_buffer * | |
77 | vmw_user_dma_buffer(struct ttm_buffer_object *bo) | |
78 | { | |
79 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); | |
80 | return container_of(vmw_bo, struct vmw_user_dma_buffer, dma); | |
81 | } | |
82 | ||
83 | struct vmw_resource *vmw_resource_reference(struct vmw_resource *res) | |
84 | { | |
85 | kref_get(&res->kref); | |
86 | return res; | |
87 | } | |
88 | ||
5bb39e81 TH |
89 | |
90 | /** | |
91 | * vmw_resource_release_id - release a resource id to the id manager. | |
92 | * | |
93 | * @res: Pointer to the resource. | |
94 | * | |
95 | * Release the resource id to the resource id manager and set it to -1 | |
96 | */ | |
543831cf | 97 | void vmw_resource_release_id(struct vmw_resource *res) |
5bb39e81 TH |
98 | { |
99 | struct vmw_private *dev_priv = res->dev_priv; | |
c0951b79 | 100 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
5bb39e81 TH |
101 | |
102 | write_lock(&dev_priv->resource_lock); | |
103 | if (res->id != -1) | |
c0951b79 | 104 | idr_remove(idr, res->id); |
5bb39e81 TH |
105 | res->id = -1; |
106 | write_unlock(&dev_priv->resource_lock); | |
107 | } | |
108 | ||
fb1d9738 JB |
109 | static void vmw_resource_release(struct kref *kref) |
110 | { | |
111 | struct vmw_resource *res = | |
112 | container_of(kref, struct vmw_resource, kref); | |
113 | struct vmw_private *dev_priv = res->dev_priv; | |
c0951b79 TH |
114 | int id; |
115 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; | |
fb1d9738 | 116 | |
5bb39e81 | 117 | res->avail = false; |
c0951b79 | 118 | list_del_init(&res->lru_head); |
fb1d9738 | 119 | write_unlock(&dev_priv->resource_lock); |
c0951b79 TH |
120 | if (res->backup) { |
121 | struct ttm_buffer_object *bo = &res->backup->base; | |
122 | ||
123 | ttm_bo_reserve(bo, false, false, false, 0); | |
124 | if (!list_empty(&res->mob_head) && | |
125 | res->func->unbind != NULL) { | |
126 | struct ttm_validate_buffer val_buf; | |
127 | ||
128 | val_buf.bo = bo; | |
129 | res->func->unbind(res, false, &val_buf); | |
130 | } | |
131 | res->backup_dirty = false; | |
132 | list_del_init(&res->mob_head); | |
133 | ttm_bo_unreserve(bo); | |
134 | vmw_dmabuf_unreference(&res->backup); | |
135 | } | |
fb1d9738 JB |
136 | |
137 | if (likely(res->hw_destroy != NULL)) | |
138 | res->hw_destroy(res); | |
139 | ||
c0951b79 | 140 | id = res->id; |
fb1d9738 JB |
141 | if (res->res_free != NULL) |
142 | res->res_free(res); | |
143 | else | |
144 | kfree(res); | |
145 | ||
146 | write_lock(&dev_priv->resource_lock); | |
5bb39e81 TH |
147 | |
148 | if (id != -1) | |
149 | idr_remove(idr, id); | |
fb1d9738 JB |
150 | } |
151 | ||
152 | void vmw_resource_unreference(struct vmw_resource **p_res) | |
153 | { | |
154 | struct vmw_resource *res = *p_res; | |
155 | struct vmw_private *dev_priv = res->dev_priv; | |
156 | ||
157 | *p_res = NULL; | |
158 | write_lock(&dev_priv->resource_lock); | |
159 | kref_put(&res->kref, vmw_resource_release); | |
160 | write_unlock(&dev_priv->resource_lock); | |
161 | } | |
162 | ||
5bb39e81 TH |
163 | |
164 | /** | |
165 | * vmw_resource_alloc_id - release a resource id to the id manager. | |
166 | * | |
5bb39e81 TH |
167 | * @res: Pointer to the resource. |
168 | * | |
169 | * Allocate the lowest free resource from the resource manager, and set | |
170 | * @res->id to that id. Returns 0 on success and -ENOMEM on failure. | |
171 | */ | |
543831cf | 172 | int vmw_resource_alloc_id(struct vmw_resource *res) |
5bb39e81 | 173 | { |
c0951b79 | 174 | struct vmw_private *dev_priv = res->dev_priv; |
5bb39e81 | 175 | int ret; |
c0951b79 | 176 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
5bb39e81 TH |
177 | |
178 | BUG_ON(res->id != -1); | |
179 | ||
180 | do { | |
c0951b79 | 181 | if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0)) |
5bb39e81 TH |
182 | return -ENOMEM; |
183 | ||
184 | write_lock(&dev_priv->resource_lock); | |
c0951b79 | 185 | ret = idr_get_new_above(idr, res, 1, &res->id); |
5bb39e81 TH |
186 | write_unlock(&dev_priv->resource_lock); |
187 | ||
188 | } while (ret == -EAGAIN); | |
189 | ||
190 | return ret; | |
191 | } | |
192 | ||
c0951b79 TH |
193 | /** |
194 | * vmw_resource_init - initialize a struct vmw_resource | |
195 | * | |
196 | * @dev_priv: Pointer to a device private struct. | |
197 | * @res: The struct vmw_resource to initialize. | |
198 | * @obj_type: Resource object type. | |
199 | * @delay_id: Boolean whether to defer device id allocation until | |
200 | * the first validation. | |
201 | * @res_free: Resource destructor. | |
202 | * @func: Resource function table. | |
203 | */ | |
543831cf TH |
204 | int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res, |
205 | bool delay_id, | |
206 | void (*res_free) (struct vmw_resource *res), | |
207 | const struct vmw_res_func *func) | |
fb1d9738 | 208 | { |
fb1d9738 JB |
209 | kref_init(&res->kref); |
210 | res->hw_destroy = NULL; | |
211 | res->res_free = res_free; | |
fb1d9738 JB |
212 | res->avail = false; |
213 | res->dev_priv = dev_priv; | |
c0951b79 TH |
214 | res->func = func; |
215 | INIT_LIST_HEAD(&res->lru_head); | |
216 | INIT_LIST_HEAD(&res->mob_head); | |
5bb39e81 | 217 | res->id = -1; |
c0951b79 TH |
218 | res->backup = NULL; |
219 | res->backup_offset = 0; | |
220 | res->backup_dirty = false; | |
221 | res->res_dirty = false; | |
5bb39e81 TH |
222 | if (delay_id) |
223 | return 0; | |
224 | else | |
c0951b79 | 225 | return vmw_resource_alloc_id(res); |
fb1d9738 JB |
226 | } |
227 | ||
228 | /** | |
229 | * vmw_resource_activate | |
230 | * | |
231 | * @res: Pointer to the newly created resource | |
232 | * @hw_destroy: Destroy function. NULL if none. | |
233 | * | |
234 | * Activate a resource after the hardware has been made aware of it. | |
235 | * Set tye destroy function to @destroy. Typically this frees the | |
236 | * resource and destroys the hardware resources associated with it. | |
237 | * Activate basically means that the function vmw_resource_lookup will | |
238 | * find it. | |
239 | */ | |
543831cf TH |
240 | void vmw_resource_activate(struct vmw_resource *res, |
241 | void (*hw_destroy) (struct vmw_resource *)) | |
fb1d9738 JB |
242 | { |
243 | struct vmw_private *dev_priv = res->dev_priv; | |
244 | ||
245 | write_lock(&dev_priv->resource_lock); | |
246 | res->avail = true; | |
247 | res->hw_destroy = hw_destroy; | |
248 | write_unlock(&dev_priv->resource_lock); | |
249 | } | |
250 | ||
251 | struct vmw_resource *vmw_resource_lookup(struct vmw_private *dev_priv, | |
252 | struct idr *idr, int id) | |
253 | { | |
254 | struct vmw_resource *res; | |
255 | ||
256 | read_lock(&dev_priv->resource_lock); | |
257 | res = idr_find(idr, id); | |
258 | if (res && res->avail) | |
259 | kref_get(&res->kref); | |
260 | else | |
261 | res = NULL; | |
262 | read_unlock(&dev_priv->resource_lock); | |
263 | ||
264 | if (unlikely(res == NULL)) | |
265 | return NULL; | |
266 | ||
267 | return res; | |
268 | } | |
269 | ||
c0951b79 TH |
270 | /** |
271 | * vmw_user_resource_lookup_handle - lookup a struct resource from a | |
272 | * TTM user-space handle and perform basic type checks | |
273 | * | |
274 | * @dev_priv: Pointer to a device private struct | |
275 | * @tfile: Pointer to a struct ttm_object_file identifying the caller | |
276 | * @handle: The TTM user-space handle | |
277 | * @converter: Pointer to an object describing the resource type | |
278 | * @p_res: On successful return the location pointed to will contain | |
279 | * a pointer to a refcounted struct vmw_resource. | |
280 | * | |
281 | * If the handle can't be found or is associated with an incorrect resource | |
282 | * type, -EINVAL will be returned. | |
283 | */ | |
284 | int vmw_user_resource_lookup_handle(struct vmw_private *dev_priv, | |
285 | struct ttm_object_file *tfile, | |
286 | uint32_t handle, | |
287 | const struct vmw_user_resource_conv | |
288 | *converter, | |
289 | struct vmw_resource **p_res) | |
fb1d9738 | 290 | { |
7a73ba74 | 291 | struct ttm_base_object *base; |
c0951b79 TH |
292 | struct vmw_resource *res; |
293 | int ret = -EINVAL; | |
fb1d9738 | 294 | |
7a73ba74 TH |
295 | base = ttm_base_object_lookup(tfile, handle); |
296 | if (unlikely(base == NULL)) | |
297 | return -EINVAL; | |
298 | ||
c0951b79 TH |
299 | if (unlikely(base->object_type != converter->object_type)) |
300 | goto out_bad_resource; | |
7a73ba74 | 301 | |
c0951b79 | 302 | res = converter->base_obj_to_res(base); |
7a73ba74 | 303 | |
c0951b79 TH |
304 | read_lock(&dev_priv->resource_lock); |
305 | if (!res->avail || res->res_free != converter->res_free) { | |
306 | read_unlock(&dev_priv->resource_lock); | |
307 | goto out_bad_resource; | |
308 | } | |
fb1d9738 | 309 | |
c0951b79 TH |
310 | kref_get(&res->kref); |
311 | read_unlock(&dev_priv->resource_lock); | |
312 | ||
313 | *p_res = res; | |
314 | ret = 0; | |
315 | ||
316 | out_bad_resource: | |
7a73ba74 | 317 | ttm_base_object_unref(&base); |
c0951b79 TH |
318 | |
319 | return ret; | |
320 | } | |
321 | ||
322 | /** | |
323 | * Helper function that looks either a surface or dmabuf. | |
324 | * | |
325 | * The pointer this pointed at by out_surf and out_buf needs to be null. | |
326 | */ | |
327 | int vmw_user_lookup_handle(struct vmw_private *dev_priv, | |
328 | struct ttm_object_file *tfile, | |
329 | uint32_t handle, | |
330 | struct vmw_surface **out_surf, | |
331 | struct vmw_dma_buffer **out_buf) | |
332 | { | |
333 | struct vmw_resource *res; | |
334 | int ret; | |
335 | ||
336 | BUG_ON(*out_surf || *out_buf); | |
337 | ||
338 | ret = vmw_user_resource_lookup_handle(dev_priv, tfile, handle, | |
339 | user_surface_converter, | |
340 | &res); | |
341 | if (!ret) { | |
342 | *out_surf = vmw_res_to_srf(res); | |
343 | return 0; | |
344 | } | |
345 | ||
346 | *out_surf = NULL; | |
347 | ret = vmw_user_dmabuf_lookup(tfile, handle, out_buf); | |
fb1d9738 JB |
348 | return ret; |
349 | } | |
350 | ||
351 | /** | |
352 | * Buffer management. | |
353 | */ | |
effe1105 TH |
354 | void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo) |
355 | { | |
356 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); | |
effe1105 | 357 | |
fb1d9738 JB |
358 | kfree(vmw_bo); |
359 | } | |
360 | ||
361 | int vmw_dmabuf_init(struct vmw_private *dev_priv, | |
362 | struct vmw_dma_buffer *vmw_bo, | |
363 | size_t size, struct ttm_placement *placement, | |
364 | bool interruptible, | |
365 | void (*bo_free) (struct ttm_buffer_object *bo)) | |
366 | { | |
367 | struct ttm_bo_device *bdev = &dev_priv->bdev; | |
fb1d9738 JB |
368 | size_t acc_size; |
369 | int ret; | |
370 | ||
371 | BUG_ON(!bo_free); | |
372 | ||
57de4ba9 | 373 | acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct vmw_dma_buffer)); |
fb1d9738 JB |
374 | memset(vmw_bo, 0, sizeof(*vmw_bo)); |
375 | ||
c0951b79 | 376 | INIT_LIST_HEAD(&vmw_bo->res_list); |
fb1d9738 JB |
377 | |
378 | ret = ttm_bo_init(bdev, &vmw_bo->base, size, | |
379 | ttm_bo_type_device, placement, | |
0b91c4a1 | 380 | 0, interruptible, |
129b78bf | 381 | NULL, acc_size, NULL, bo_free); |
fb1d9738 JB |
382 | return ret; |
383 | } | |
384 | ||
385 | static void vmw_user_dmabuf_destroy(struct ttm_buffer_object *bo) | |
386 | { | |
387 | struct vmw_user_dma_buffer *vmw_user_bo = vmw_user_dma_buffer(bo); | |
fb1d9738 | 388 | |
cdad0521 | 389 | ttm_base_object_kfree(vmw_user_bo, base); |
fb1d9738 JB |
390 | } |
391 | ||
392 | static void vmw_user_dmabuf_release(struct ttm_base_object **p_base) | |
393 | { | |
394 | struct vmw_user_dma_buffer *vmw_user_bo; | |
395 | struct ttm_base_object *base = *p_base; | |
396 | struct ttm_buffer_object *bo; | |
397 | ||
398 | *p_base = NULL; | |
399 | ||
400 | if (unlikely(base == NULL)) | |
401 | return; | |
402 | ||
403 | vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base); | |
404 | bo = &vmw_user_bo->dma.base; | |
405 | ttm_bo_unref(&bo); | |
406 | } | |
407 | ||
c0951b79 TH |
408 | /** |
409 | * vmw_user_dmabuf_alloc - Allocate a user dma buffer | |
410 | * | |
411 | * @dev_priv: Pointer to a struct device private. | |
412 | * @tfile: Pointer to a struct ttm_object_file on which to register the user | |
413 | * object. | |
414 | * @size: Size of the dma buffer. | |
415 | * @shareable: Boolean whether the buffer is shareable with other open files. | |
416 | * @handle: Pointer to where the handle value should be assigned. | |
417 | * @p_dma_buf: Pointer to where the refcounted struct vmw_dma_buffer pointer | |
418 | * should be assigned. | |
419 | */ | |
420 | int vmw_user_dmabuf_alloc(struct vmw_private *dev_priv, | |
421 | struct ttm_object_file *tfile, | |
422 | uint32_t size, | |
423 | bool shareable, | |
424 | uint32_t *handle, | |
425 | struct vmw_dma_buffer **p_dma_buf) | |
426 | { | |
427 | struct vmw_user_dma_buffer *user_bo; | |
428 | struct ttm_buffer_object *tmp; | |
429 | int ret; | |
430 | ||
431 | user_bo = kzalloc(sizeof(*user_bo), GFP_KERNEL); | |
432 | if (unlikely(user_bo == NULL)) { | |
433 | DRM_ERROR("Failed to allocate a buffer.\n"); | |
434 | return -ENOMEM; | |
435 | } | |
436 | ||
437 | ret = vmw_dmabuf_init(dev_priv, &user_bo->dma, size, | |
438 | &vmw_vram_sys_placement, true, | |
439 | &vmw_user_dmabuf_destroy); | |
440 | if (unlikely(ret != 0)) | |
441 | return ret; | |
442 | ||
443 | tmp = ttm_bo_reference(&user_bo->dma.base); | |
444 | ret = ttm_base_object_init(tfile, | |
445 | &user_bo->base, | |
446 | shareable, | |
447 | ttm_buffer_type, | |
448 | &vmw_user_dmabuf_release, NULL); | |
449 | if (unlikely(ret != 0)) { | |
450 | ttm_bo_unref(&tmp); | |
451 | goto out_no_base_object; | |
452 | } | |
453 | ||
454 | *p_dma_buf = &user_bo->dma; | |
455 | *handle = user_bo->base.hash.key; | |
456 | ||
457 | out_no_base_object: | |
458 | return ret; | |
459 | } | |
460 | ||
d08a9b9c TH |
461 | /** |
462 | * vmw_user_dmabuf_verify_access - verify access permissions on this | |
463 | * buffer object. | |
464 | * | |
465 | * @bo: Pointer to the buffer object being accessed | |
466 | * @tfile: Identifying the caller. | |
467 | */ | |
468 | int vmw_user_dmabuf_verify_access(struct ttm_buffer_object *bo, | |
469 | struct ttm_object_file *tfile) | |
470 | { | |
471 | struct vmw_user_dma_buffer *vmw_user_bo; | |
472 | ||
473 | if (unlikely(bo->destroy != vmw_user_dmabuf_destroy)) | |
474 | return -EPERM; | |
475 | ||
476 | vmw_user_bo = vmw_user_dma_buffer(bo); | |
477 | return (vmw_user_bo->base.tfile == tfile || | |
478 | vmw_user_bo->base.shareable) ? 0 : -EPERM; | |
479 | } | |
480 | ||
fb1d9738 JB |
481 | int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data, |
482 | struct drm_file *file_priv) | |
483 | { | |
484 | struct vmw_private *dev_priv = vmw_priv(dev); | |
485 | union drm_vmw_alloc_dmabuf_arg *arg = | |
486 | (union drm_vmw_alloc_dmabuf_arg *)data; | |
487 | struct drm_vmw_alloc_dmabuf_req *req = &arg->req; | |
488 | struct drm_vmw_dmabuf_rep *rep = &arg->rep; | |
c0951b79 TH |
489 | struct vmw_dma_buffer *dma_buf; |
490 | uint32_t handle; | |
fb1d9738 JB |
491 | struct vmw_master *vmaster = vmw_master(file_priv->master); |
492 | int ret; | |
493 | ||
fb1d9738 | 494 | ret = ttm_read_lock(&vmaster->lock, true); |
c0951b79 | 495 | if (unlikely(ret != 0)) |
fb1d9738 | 496 | return ret; |
fb1d9738 | 497 | |
c0951b79 TH |
498 | ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile, |
499 | req->size, false, &handle, &dma_buf); | |
fb1d9738 | 500 | if (unlikely(ret != 0)) |
2f5993cc | 501 | goto out_no_dmabuf; |
fb1d9738 | 502 | |
c0951b79 TH |
503 | rep->handle = handle; |
504 | rep->map_handle = dma_buf->base.addr_space_offset; | |
505 | rep->cur_gmr_id = handle; | |
506 | rep->cur_gmr_offset = 0; | |
507 | ||
508 | vmw_dmabuf_unreference(&dma_buf); | |
fb1d9738 | 509 | |
2f5993cc | 510 | out_no_dmabuf: |
fb1d9738 JB |
511 | ttm_read_unlock(&vmaster->lock); |
512 | ||
2f5993cc | 513 | return ret; |
fb1d9738 JB |
514 | } |
515 | ||
516 | int vmw_dmabuf_unref_ioctl(struct drm_device *dev, void *data, | |
517 | struct drm_file *file_priv) | |
518 | { | |
519 | struct drm_vmw_unref_dmabuf_arg *arg = | |
520 | (struct drm_vmw_unref_dmabuf_arg *)data; | |
521 | ||
522 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, | |
523 | arg->handle, | |
524 | TTM_REF_USAGE); | |
525 | } | |
526 | ||
fb1d9738 JB |
527 | int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile, |
528 | uint32_t handle, struct vmw_dma_buffer **out) | |
529 | { | |
530 | struct vmw_user_dma_buffer *vmw_user_bo; | |
531 | struct ttm_base_object *base; | |
532 | ||
533 | base = ttm_base_object_lookup(tfile, handle); | |
534 | if (unlikely(base == NULL)) { | |
535 | printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n", | |
536 | (unsigned long)handle); | |
537 | return -ESRCH; | |
538 | } | |
539 | ||
540 | if (unlikely(base->object_type != ttm_buffer_type)) { | |
541 | ttm_base_object_unref(&base); | |
542 | printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n", | |
543 | (unsigned long)handle); | |
544 | return -EINVAL; | |
545 | } | |
546 | ||
547 | vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base); | |
548 | (void)ttm_bo_reference(&vmw_user_bo->dma.base); | |
549 | ttm_base_object_unref(&base); | |
550 | *out = &vmw_user_bo->dma; | |
551 | ||
552 | return 0; | |
553 | } | |
554 | ||
c0951b79 TH |
555 | int vmw_user_dmabuf_reference(struct ttm_object_file *tfile, |
556 | struct vmw_dma_buffer *dma_buf) | |
557 | { | |
558 | struct vmw_user_dma_buffer *user_bo; | |
559 | ||
560 | if (dma_buf->base.destroy != vmw_user_dmabuf_destroy) | |
561 | return -EINVAL; | |
562 | ||
563 | user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, dma); | |
564 | return ttm_ref_object_add(tfile, &user_bo->base, TTM_REF_USAGE, NULL); | |
565 | } | |
566 | ||
fb1d9738 | 567 | /* |
65155b37 | 568 | * Stream management |
fb1d9738 JB |
569 | */ |
570 | ||
571 | static void vmw_stream_destroy(struct vmw_resource *res) | |
572 | { | |
573 | struct vmw_private *dev_priv = res->dev_priv; | |
574 | struct vmw_stream *stream; | |
575 | int ret; | |
576 | ||
577 | DRM_INFO("%s: unref\n", __func__); | |
578 | stream = container_of(res, struct vmw_stream, res); | |
579 | ||
580 | ret = vmw_overlay_unref(dev_priv, stream->stream_id); | |
581 | WARN_ON(ret != 0); | |
582 | } | |
583 | ||
584 | static int vmw_stream_init(struct vmw_private *dev_priv, | |
585 | struct vmw_stream *stream, | |
586 | void (*res_free) (struct vmw_resource *res)) | |
587 | { | |
588 | struct vmw_resource *res = &stream->res; | |
589 | int ret; | |
590 | ||
c0951b79 TH |
591 | ret = vmw_resource_init(dev_priv, res, false, res_free, |
592 | &vmw_stream_func); | |
fb1d9738 JB |
593 | |
594 | if (unlikely(ret != 0)) { | |
595 | if (res_free == NULL) | |
596 | kfree(stream); | |
597 | else | |
598 | res_free(&stream->res); | |
599 | return ret; | |
600 | } | |
601 | ||
602 | ret = vmw_overlay_claim(dev_priv, &stream->stream_id); | |
603 | if (ret) { | |
604 | vmw_resource_unreference(&res); | |
605 | return ret; | |
606 | } | |
607 | ||
608 | DRM_INFO("%s: claimed\n", __func__); | |
609 | ||
610 | vmw_resource_activate(&stream->res, vmw_stream_destroy); | |
611 | return 0; | |
612 | } | |
613 | ||
fb1d9738 JB |
614 | static void vmw_user_stream_free(struct vmw_resource *res) |
615 | { | |
616 | struct vmw_user_stream *stream = | |
617 | container_of(res, struct vmw_user_stream, stream.res); | |
414ee50b | 618 | struct vmw_private *dev_priv = res->dev_priv; |
fb1d9738 | 619 | |
cdad0521 | 620 | ttm_base_object_kfree(stream, base); |
414ee50b TH |
621 | ttm_mem_global_free(vmw_mem_glob(dev_priv), |
622 | vmw_user_stream_size); | |
fb1d9738 JB |
623 | } |
624 | ||
625 | /** | |
626 | * This function is called when user space has no more references on the | |
627 | * base object. It releases the base-object's reference on the resource object. | |
628 | */ | |
629 | ||
630 | static void vmw_user_stream_base_release(struct ttm_base_object **p_base) | |
631 | { | |
632 | struct ttm_base_object *base = *p_base; | |
633 | struct vmw_user_stream *stream = | |
634 | container_of(base, struct vmw_user_stream, base); | |
635 | struct vmw_resource *res = &stream->stream.res; | |
636 | ||
637 | *p_base = NULL; | |
638 | vmw_resource_unreference(&res); | |
639 | } | |
640 | ||
641 | int vmw_stream_unref_ioctl(struct drm_device *dev, void *data, | |
642 | struct drm_file *file_priv) | |
643 | { | |
644 | struct vmw_private *dev_priv = vmw_priv(dev); | |
645 | struct vmw_resource *res; | |
646 | struct vmw_user_stream *stream; | |
647 | struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; | |
648 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
c0951b79 | 649 | struct idr *idr = &dev_priv->res_idr[vmw_res_stream]; |
fb1d9738 JB |
650 | int ret = 0; |
651 | ||
c0951b79 TH |
652 | |
653 | res = vmw_resource_lookup(dev_priv, idr, arg->stream_id); | |
fb1d9738 JB |
654 | if (unlikely(res == NULL)) |
655 | return -EINVAL; | |
656 | ||
657 | if (res->res_free != &vmw_user_stream_free) { | |
658 | ret = -EINVAL; | |
659 | goto out; | |
660 | } | |
661 | ||
662 | stream = container_of(res, struct vmw_user_stream, stream.res); | |
663 | if (stream->base.tfile != tfile) { | |
664 | ret = -EINVAL; | |
665 | goto out; | |
666 | } | |
667 | ||
668 | ttm_ref_object_base_unref(tfile, stream->base.hash.key, TTM_REF_USAGE); | |
669 | out: | |
670 | vmw_resource_unreference(&res); | |
671 | return ret; | |
672 | } | |
673 | ||
674 | int vmw_stream_claim_ioctl(struct drm_device *dev, void *data, | |
675 | struct drm_file *file_priv) | |
676 | { | |
677 | struct vmw_private *dev_priv = vmw_priv(dev); | |
414ee50b | 678 | struct vmw_user_stream *stream; |
fb1d9738 JB |
679 | struct vmw_resource *res; |
680 | struct vmw_resource *tmp; | |
681 | struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; | |
682 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
414ee50b | 683 | struct vmw_master *vmaster = vmw_master(file_priv->master); |
fb1d9738 JB |
684 | int ret; |
685 | ||
414ee50b TH |
686 | /* |
687 | * Approximate idr memory usage with 128 bytes. It will be limited | |
688 | * by maximum number_of streams anyway? | |
689 | */ | |
690 | ||
691 | if (unlikely(vmw_user_stream_size == 0)) | |
692 | vmw_user_stream_size = ttm_round_pot(sizeof(*stream)) + 128; | |
693 | ||
694 | ret = ttm_read_lock(&vmaster->lock, true); | |
695 | if (unlikely(ret != 0)) | |
696 | return ret; | |
697 | ||
698 | ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), | |
699 | vmw_user_stream_size, | |
700 | false, true); | |
701 | if (unlikely(ret != 0)) { | |
702 | if (ret != -ERESTARTSYS) | |
703 | DRM_ERROR("Out of graphics memory for stream" | |
704 | " creation.\n"); | |
705 | goto out_unlock; | |
706 | } | |
707 | ||
708 | ||
709 | stream = kmalloc(sizeof(*stream), GFP_KERNEL); | |
710 | if (unlikely(stream == NULL)) { | |
711 | ttm_mem_global_free(vmw_mem_glob(dev_priv), | |
712 | vmw_user_stream_size); | |
713 | ret = -ENOMEM; | |
714 | goto out_unlock; | |
715 | } | |
fb1d9738 JB |
716 | |
717 | res = &stream->stream.res; | |
718 | stream->base.shareable = false; | |
719 | stream->base.tfile = NULL; | |
720 | ||
414ee50b TH |
721 | /* |
722 | * From here on, the destructor takes over resource freeing. | |
723 | */ | |
724 | ||
fb1d9738 JB |
725 | ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free); |
726 | if (unlikely(ret != 0)) | |
414ee50b | 727 | goto out_unlock; |
fb1d9738 JB |
728 | |
729 | tmp = vmw_resource_reference(res); | |
730 | ret = ttm_base_object_init(tfile, &stream->base, false, VMW_RES_STREAM, | |
731 | &vmw_user_stream_base_release, NULL); | |
732 | ||
733 | if (unlikely(ret != 0)) { | |
734 | vmw_resource_unreference(&tmp); | |
735 | goto out_err; | |
736 | } | |
737 | ||
738 | arg->stream_id = res->id; | |
739 | out_err: | |
740 | vmw_resource_unreference(&res); | |
414ee50b TH |
741 | out_unlock: |
742 | ttm_read_unlock(&vmaster->lock); | |
fb1d9738 JB |
743 | return ret; |
744 | } | |
745 | ||
746 | int vmw_user_stream_lookup(struct vmw_private *dev_priv, | |
747 | struct ttm_object_file *tfile, | |
748 | uint32_t *inout_id, struct vmw_resource **out) | |
749 | { | |
750 | struct vmw_user_stream *stream; | |
751 | struct vmw_resource *res; | |
752 | int ret; | |
753 | ||
c0951b79 TH |
754 | res = vmw_resource_lookup(dev_priv, &dev_priv->res_idr[vmw_res_stream], |
755 | *inout_id); | |
fb1d9738 JB |
756 | if (unlikely(res == NULL)) |
757 | return -EINVAL; | |
758 | ||
759 | if (res->res_free != &vmw_user_stream_free) { | |
760 | ret = -EINVAL; | |
761 | goto err_ref; | |
762 | } | |
763 | ||
764 | stream = container_of(res, struct vmw_user_stream, stream.res); | |
765 | if (stream->base.tfile != tfile) { | |
766 | ret = -EPERM; | |
767 | goto err_ref; | |
768 | } | |
769 | ||
770 | *inout_id = stream->stream.stream_id; | |
771 | *out = res; | |
772 | return 0; | |
773 | err_ref: | |
774 | vmw_resource_unreference(&res); | |
775 | return ret; | |
776 | } | |
5e1782d2 DA |
777 | |
778 | ||
779 | int vmw_dumb_create(struct drm_file *file_priv, | |
780 | struct drm_device *dev, | |
781 | struct drm_mode_create_dumb *args) | |
782 | { | |
783 | struct vmw_private *dev_priv = vmw_priv(dev); | |
784 | struct vmw_master *vmaster = vmw_master(file_priv->master); | |
785 | struct vmw_user_dma_buffer *vmw_user_bo; | |
786 | struct ttm_buffer_object *tmp; | |
787 | int ret; | |
788 | ||
789 | args->pitch = args->width * ((args->bpp + 7) / 8); | |
790 | args->size = args->pitch * args->height; | |
791 | ||
792 | vmw_user_bo = kzalloc(sizeof(*vmw_user_bo), GFP_KERNEL); | |
793 | if (vmw_user_bo == NULL) | |
794 | return -ENOMEM; | |
795 | ||
796 | ret = ttm_read_lock(&vmaster->lock, true); | |
797 | if (ret != 0) { | |
798 | kfree(vmw_user_bo); | |
799 | return ret; | |
800 | } | |
801 | ||
802 | ret = vmw_dmabuf_init(dev_priv, &vmw_user_bo->dma, args->size, | |
803 | &vmw_vram_sys_placement, true, | |
804 | &vmw_user_dmabuf_destroy); | |
805 | if (ret != 0) | |
806 | goto out_no_dmabuf; | |
807 | ||
808 | tmp = ttm_bo_reference(&vmw_user_bo->dma.base); | |
809 | ret = ttm_base_object_init(vmw_fpriv(file_priv)->tfile, | |
810 | &vmw_user_bo->base, | |
811 | false, | |
812 | ttm_buffer_type, | |
813 | &vmw_user_dmabuf_release, NULL); | |
814 | if (unlikely(ret != 0)) | |
815 | goto out_no_base_object; | |
816 | ||
817 | args->handle = vmw_user_bo->base.hash.key; | |
818 | ||
819 | out_no_base_object: | |
820 | ttm_bo_unref(&tmp); | |
821 | out_no_dmabuf: | |
822 | ttm_read_unlock(&vmaster->lock); | |
823 | return ret; | |
824 | } | |
825 | ||
826 | int vmw_dumb_map_offset(struct drm_file *file_priv, | |
827 | struct drm_device *dev, uint32_t handle, | |
828 | uint64_t *offset) | |
829 | { | |
830 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
831 | struct vmw_dma_buffer *out_buf; | |
832 | int ret; | |
833 | ||
834 | ret = vmw_user_dmabuf_lookup(tfile, handle, &out_buf); | |
835 | if (ret != 0) | |
836 | return -EINVAL; | |
837 | ||
838 | *offset = out_buf->base.addr_space_offset; | |
839 | vmw_dmabuf_unreference(&out_buf); | |
840 | return 0; | |
841 | } | |
842 | ||
843 | int vmw_dumb_destroy(struct drm_file *file_priv, | |
844 | struct drm_device *dev, | |
845 | uint32_t handle) | |
846 | { | |
847 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, | |
848 | handle, TTM_REF_USAGE); | |
849 | } | |
c0951b79 TH |
850 | |
851 | /** | |
852 | * vmw_resource_buf_alloc - Allocate a backup buffer for a resource. | |
853 | * | |
854 | * @res: The resource for which to allocate a backup buffer. | |
855 | * @interruptible: Whether any sleeps during allocation should be | |
856 | * performed while interruptible. | |
857 | */ | |
858 | static int vmw_resource_buf_alloc(struct vmw_resource *res, | |
859 | bool interruptible) | |
860 | { | |
861 | unsigned long size = | |
862 | (res->backup_size + PAGE_SIZE - 1) & PAGE_MASK; | |
863 | struct vmw_dma_buffer *backup; | |
864 | int ret; | |
865 | ||
866 | if (likely(res->backup)) { | |
867 | BUG_ON(res->backup->base.num_pages * PAGE_SIZE < size); | |
868 | return 0; | |
869 | } | |
870 | ||
871 | backup = kzalloc(sizeof(*backup), GFP_KERNEL); | |
872 | if (unlikely(backup == NULL)) | |
873 | return -ENOMEM; | |
874 | ||
875 | ret = vmw_dmabuf_init(res->dev_priv, backup, res->backup_size, | |
876 | res->func->backup_placement, | |
877 | interruptible, | |
878 | &vmw_dmabuf_bo_free); | |
879 | if (unlikely(ret != 0)) | |
880 | goto out_no_dmabuf; | |
881 | ||
882 | res->backup = backup; | |
883 | ||
884 | out_no_dmabuf: | |
885 | return ret; | |
886 | } | |
887 | ||
888 | /** | |
889 | * vmw_resource_do_validate - Make a resource up-to-date and visible | |
890 | * to the device. | |
891 | * | |
892 | * @res: The resource to make visible to the device. | |
893 | * @val_buf: Information about a buffer possibly | |
894 | * containing backup data if a bind operation is needed. | |
895 | * | |
896 | * On hardware resource shortage, this function returns -EBUSY and | |
897 | * should be retried once resources have been freed up. | |
898 | */ | |
899 | static int vmw_resource_do_validate(struct vmw_resource *res, | |
900 | struct ttm_validate_buffer *val_buf) | |
901 | { | |
902 | int ret = 0; | |
903 | const struct vmw_res_func *func = res->func; | |
904 | ||
905 | if (unlikely(res->id == -1)) { | |
906 | ret = func->create(res); | |
907 | if (unlikely(ret != 0)) | |
908 | return ret; | |
909 | } | |
910 | ||
911 | if (func->bind && | |
912 | ((func->needs_backup && list_empty(&res->mob_head) && | |
913 | val_buf->bo != NULL) || | |
914 | (!func->needs_backup && val_buf->bo != NULL))) { | |
915 | ret = func->bind(res, val_buf); | |
916 | if (unlikely(ret != 0)) | |
917 | goto out_bind_failed; | |
918 | if (func->needs_backup) | |
919 | list_add_tail(&res->mob_head, &res->backup->res_list); | |
920 | } | |
921 | ||
922 | /* | |
923 | * Only do this on write operations, and move to | |
924 | * vmw_resource_unreserve if it can be called after | |
925 | * backup buffers have been unreserved. Otherwise | |
926 | * sort out locking. | |
927 | */ | |
928 | res->res_dirty = true; | |
929 | ||
930 | return 0; | |
931 | ||
932 | out_bind_failed: | |
933 | func->destroy(res); | |
934 | ||
935 | return ret; | |
936 | } | |
937 | ||
938 | /** | |
939 | * vmw_resource_unreserve - Unreserve a resource previously reserved for | |
940 | * command submission. | |
941 | * | |
942 | * @res: Pointer to the struct vmw_resource to unreserve. | |
943 | * @new_backup: Pointer to new backup buffer if command submission | |
944 | * switched. | |
945 | * @new_backup_offset: New backup offset if @new_backup is !NULL. | |
946 | * | |
947 | * Currently unreserving a resource means putting it back on the device's | |
948 | * resource lru list, so that it can be evicted if necessary. | |
949 | */ | |
950 | void vmw_resource_unreserve(struct vmw_resource *res, | |
951 | struct vmw_dma_buffer *new_backup, | |
952 | unsigned long new_backup_offset) | |
953 | { | |
954 | struct vmw_private *dev_priv = res->dev_priv; | |
955 | ||
956 | if (!list_empty(&res->lru_head)) | |
957 | return; | |
958 | ||
959 | if (new_backup && new_backup != res->backup) { | |
960 | ||
961 | if (res->backup) { | |
962 | BUG_ON(atomic_read(&res->backup->base.reserved) == 0); | |
963 | list_del_init(&res->mob_head); | |
964 | vmw_dmabuf_unreference(&res->backup); | |
965 | } | |
966 | ||
967 | res->backup = vmw_dmabuf_reference(new_backup); | |
968 | BUG_ON(atomic_read(&new_backup->base.reserved) == 0); | |
969 | list_add_tail(&res->mob_head, &new_backup->res_list); | |
970 | } | |
971 | if (new_backup) | |
972 | res->backup_offset = new_backup_offset; | |
973 | ||
974 | if (!res->func->may_evict) | |
975 | return; | |
976 | ||
977 | write_lock(&dev_priv->resource_lock); | |
978 | list_add_tail(&res->lru_head, | |
979 | &res->dev_priv->res_lru[res->func->res_type]); | |
980 | write_unlock(&dev_priv->resource_lock); | |
981 | } | |
982 | ||
983 | /** | |
984 | * vmw_resource_check_buffer - Check whether a backup buffer is needed | |
985 | * for a resource and in that case, allocate | |
986 | * one, reserve and validate it. | |
987 | * | |
988 | * @res: The resource for which to allocate a backup buffer. | |
989 | * @interruptible: Whether any sleeps during allocation should be | |
990 | * performed while interruptible. | |
991 | * @val_buf: On successful return contains data about the | |
992 | * reserved and validated backup buffer. | |
993 | */ | |
994 | int vmw_resource_check_buffer(struct vmw_resource *res, | |
995 | bool interruptible, | |
996 | struct ttm_validate_buffer *val_buf) | |
997 | { | |
998 | struct list_head val_list; | |
999 | bool backup_dirty = false; | |
1000 | int ret; | |
1001 | ||
1002 | if (unlikely(res->backup == NULL)) { | |
1003 | ret = vmw_resource_buf_alloc(res, interruptible); | |
1004 | if (unlikely(ret != 0)) | |
1005 | return ret; | |
1006 | } | |
1007 | ||
1008 | INIT_LIST_HEAD(&val_list); | |
1009 | val_buf->bo = ttm_bo_reference(&res->backup->base); | |
1010 | list_add_tail(&val_buf->head, &val_list); | |
1011 | ret = ttm_eu_reserve_buffers(&val_list); | |
1012 | if (unlikely(ret != 0)) | |
1013 | goto out_no_reserve; | |
1014 | ||
1015 | if (res->func->needs_backup && list_empty(&res->mob_head)) | |
1016 | return 0; | |
1017 | ||
1018 | backup_dirty = res->backup_dirty; | |
1019 | ret = ttm_bo_validate(&res->backup->base, | |
1020 | res->func->backup_placement, | |
1021 | true, false, false); | |
1022 | ||
1023 | if (unlikely(ret != 0)) | |
1024 | goto out_no_validate; | |
1025 | ||
1026 | return 0; | |
1027 | ||
1028 | out_no_validate: | |
1029 | ttm_eu_backoff_reservation(&val_list); | |
1030 | out_no_reserve: | |
1031 | ttm_bo_unref(&val_buf->bo); | |
1032 | if (backup_dirty) | |
1033 | vmw_dmabuf_unreference(&res->backup); | |
1034 | ||
1035 | return ret; | |
1036 | } | |
1037 | ||
1038 | /** | |
1039 | * vmw_resource_reserve - Reserve a resource for command submission | |
1040 | * | |
1041 | * @res: The resource to reserve. | |
1042 | * | |
1043 | * This function takes the resource off the LRU list and make sure | |
1044 | * a backup buffer is present for guest-backed resources. However, | |
1045 | * the buffer may not be bound to the resource at this point. | |
1046 | * | |
1047 | */ | |
1048 | int vmw_resource_reserve(struct vmw_resource *res, bool no_backup) | |
1049 | { | |
1050 | struct vmw_private *dev_priv = res->dev_priv; | |
1051 | int ret; | |
1052 | ||
1053 | write_lock(&dev_priv->resource_lock); | |
1054 | list_del_init(&res->lru_head); | |
1055 | write_unlock(&dev_priv->resource_lock); | |
1056 | ||
1057 | if (res->func->needs_backup && res->backup == NULL && | |
1058 | !no_backup) { | |
1059 | ret = vmw_resource_buf_alloc(res, true); | |
1060 | if (unlikely(ret != 0)) | |
1061 | return ret; | |
1062 | } | |
1063 | ||
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | /** | |
1068 | * vmw_resource_backoff_reservation - Unreserve and unreference a | |
1069 | * backup buffer | |
1070 | *. | |
1071 | * @val_buf: Backup buffer information. | |
1072 | */ | |
1073 | void vmw_resource_backoff_reservation(struct ttm_validate_buffer *val_buf) | |
1074 | { | |
1075 | struct list_head val_list; | |
1076 | ||
1077 | if (likely(val_buf->bo == NULL)) | |
1078 | return; | |
1079 | ||
1080 | INIT_LIST_HEAD(&val_list); | |
1081 | list_add_tail(&val_buf->head, &val_list); | |
1082 | ttm_eu_backoff_reservation(&val_list); | |
1083 | ttm_bo_unref(&val_buf->bo); | |
1084 | } | |
1085 | ||
1086 | /** | |
1087 | * vmw_resource_do_evict - Evict a resource, and transfer its data | |
1088 | * to a backup buffer. | |
1089 | * | |
1090 | * @res: The resource to evict. | |
1091 | */ | |
1092 | int vmw_resource_do_evict(struct vmw_resource *res) | |
1093 | { | |
1094 | struct ttm_validate_buffer val_buf; | |
1095 | const struct vmw_res_func *func = res->func; | |
1096 | int ret; | |
1097 | ||
1098 | BUG_ON(!func->may_evict); | |
1099 | ||
1100 | val_buf.bo = NULL; | |
1101 | ret = vmw_resource_check_buffer(res, true, &val_buf); | |
1102 | if (unlikely(ret != 0)) | |
1103 | return ret; | |
1104 | ||
1105 | if (unlikely(func->unbind != NULL && | |
1106 | (!func->needs_backup || !list_empty(&res->mob_head)))) { | |
1107 | ret = func->unbind(res, res->res_dirty, &val_buf); | |
1108 | if (unlikely(ret != 0)) | |
1109 | goto out_no_unbind; | |
1110 | list_del_init(&res->mob_head); | |
1111 | } | |
1112 | ret = func->destroy(res); | |
1113 | res->backup_dirty = true; | |
1114 | res->res_dirty = false; | |
1115 | out_no_unbind: | |
1116 | vmw_resource_backoff_reservation(&val_buf); | |
1117 | ||
1118 | return ret; | |
1119 | } | |
1120 | ||
1121 | ||
1122 | /** | |
1123 | * vmw_resource_validate - Make a resource up-to-date and visible | |
1124 | * to the device. | |
1125 | * | |
1126 | * @res: The resource to make visible to the device. | |
1127 | * | |
1128 | * On succesful return, any backup DMA buffer pointed to by @res->backup will | |
1129 | * be reserved and validated. | |
1130 | * On hardware resource shortage, this function will repeatedly evict | |
1131 | * resources of the same type until the validation succeeds. | |
1132 | */ | |
1133 | int vmw_resource_validate(struct vmw_resource *res) | |
1134 | { | |
1135 | int ret; | |
1136 | struct vmw_resource *evict_res; | |
1137 | struct vmw_private *dev_priv = res->dev_priv; | |
1138 | struct list_head *lru_list = &dev_priv->res_lru[res->func->res_type]; | |
1139 | struct ttm_validate_buffer val_buf; | |
1140 | ||
1141 | if (likely(!res->func->may_evict)) | |
1142 | return 0; | |
1143 | ||
1144 | val_buf.bo = NULL; | |
1145 | if (res->backup) | |
1146 | val_buf.bo = &res->backup->base; | |
1147 | do { | |
1148 | ret = vmw_resource_do_validate(res, &val_buf); | |
1149 | if (likely(ret != -EBUSY)) | |
1150 | break; | |
1151 | ||
1152 | write_lock(&dev_priv->resource_lock); | |
1153 | if (list_empty(lru_list) || !res->func->may_evict) { | |
1154 | DRM_ERROR("Out of device device id entries " | |
1155 | "for %s.\n", res->func->type_name); | |
1156 | ret = -EBUSY; | |
1157 | write_unlock(&dev_priv->resource_lock); | |
1158 | break; | |
1159 | } | |
1160 | ||
1161 | evict_res = vmw_resource_reference | |
1162 | (list_first_entry(lru_list, struct vmw_resource, | |
1163 | lru_head)); | |
1164 | list_del_init(&evict_res->lru_head); | |
1165 | ||
1166 | write_unlock(&dev_priv->resource_lock); | |
1167 | vmw_resource_do_evict(evict_res); | |
1168 | vmw_resource_unreference(&evict_res); | |
1169 | } while (1); | |
1170 | ||
1171 | if (unlikely(ret != 0)) | |
1172 | goto out_no_validate; | |
1173 | else if (!res->func->needs_backup && res->backup) { | |
1174 | list_del_init(&res->mob_head); | |
1175 | vmw_dmabuf_unreference(&res->backup); | |
1176 | } | |
1177 | ||
1178 | return 0; | |
1179 | ||
1180 | out_no_validate: | |
1181 | return ret; | |
1182 | } | |
1183 | ||
1184 | /** | |
1185 | * vmw_fence_single_bo - Utility function to fence a single TTM buffer | |
1186 | * object without unreserving it. | |
1187 | * | |
1188 | * @bo: Pointer to the struct ttm_buffer_object to fence. | |
1189 | * @fence: Pointer to the fence. If NULL, this function will | |
1190 | * insert a fence into the command stream.. | |
1191 | * | |
1192 | * Contrary to the ttm_eu version of this function, it takes only | |
1193 | * a single buffer object instead of a list, and it also doesn't | |
1194 | * unreserve the buffer object, which needs to be done separately. | |
1195 | */ | |
1196 | void vmw_fence_single_bo(struct ttm_buffer_object *bo, | |
1197 | struct vmw_fence_obj *fence) | |
1198 | { | |
1199 | struct ttm_bo_device *bdev = bo->bdev; | |
1200 | struct ttm_bo_driver *driver = bdev->driver; | |
1201 | struct vmw_fence_obj *old_fence_obj; | |
1202 | struct vmw_private *dev_priv = | |
1203 | container_of(bdev, struct vmw_private, bdev); | |
1204 | ||
1205 | if (fence == NULL) | |
1206 | vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL); | |
1207 | else | |
1208 | driver->sync_obj_ref(fence); | |
1209 | ||
1210 | spin_lock(&bdev->fence_lock); | |
1211 | ||
1212 | old_fence_obj = bo->sync_obj; | |
1213 | bo->sync_obj = fence; | |
1214 | ||
1215 | spin_unlock(&bdev->fence_lock); | |
1216 | ||
1217 | if (old_fence_obj) | |
1218 | vmw_fence_obj_unreference(&old_fence_obj); | |
1219 | } | |
1220 | ||
1221 | /** | |
1222 | * vmw_resource_move_notify - TTM move_notify_callback | |
1223 | * | |
1224 | * @bo: The TTM buffer object about to move. | |
1225 | * @mem: The truct ttm_mem_reg indicating to what memory | |
1226 | * region the move is taking place. | |
1227 | * | |
1228 | * For now does nothing. | |
1229 | */ | |
1230 | void vmw_resource_move_notify(struct ttm_buffer_object *bo, | |
1231 | struct ttm_mem_reg *mem) | |
1232 | { | |
1233 | } | |
1234 | ||
1235 | /** | |
1236 | * vmw_resource_needs_backup - Return whether a resource needs a backup buffer. | |
1237 | * | |
1238 | * @res: The resource being queried. | |
1239 | */ | |
1240 | bool vmw_resource_needs_backup(const struct vmw_resource *res) | |
1241 | { | |
1242 | return res->func->needs_backup; | |
1243 | } | |
1244 | ||
1245 | /** | |
1246 | * vmw_resource_evict_type - Evict all resources of a specific type | |
1247 | * | |
1248 | * @dev_priv: Pointer to a device private struct | |
1249 | * @type: The resource type to evict | |
1250 | * | |
1251 | * To avoid thrashing starvation or as part of the hibernation sequence, | |
1252 | * evict all evictable resources of a specific type. | |
1253 | */ | |
1254 | static void vmw_resource_evict_type(struct vmw_private *dev_priv, | |
1255 | enum vmw_res_type type) | |
1256 | { | |
1257 | struct list_head *lru_list = &dev_priv->res_lru[type]; | |
1258 | struct vmw_resource *evict_res; | |
1259 | ||
1260 | do { | |
1261 | write_lock(&dev_priv->resource_lock); | |
1262 | ||
1263 | if (list_empty(lru_list)) | |
1264 | goto out_unlock; | |
1265 | ||
1266 | evict_res = vmw_resource_reference( | |
1267 | list_first_entry(lru_list, struct vmw_resource, | |
1268 | lru_head)); | |
1269 | list_del_init(&evict_res->lru_head); | |
1270 | write_unlock(&dev_priv->resource_lock); | |
1271 | vmw_resource_do_evict(evict_res); | |
1272 | vmw_resource_unreference(&evict_res); | |
1273 | } while (1); | |
1274 | ||
1275 | out_unlock: | |
1276 | write_unlock(&dev_priv->resource_lock); | |
1277 | } | |
1278 | ||
1279 | /** | |
1280 | * vmw_resource_evict_all - Evict all evictable resources | |
1281 | * | |
1282 | * @dev_priv: Pointer to a device private struct | |
1283 | * | |
1284 | * To avoid thrashing starvation or as part of the hibernation sequence, | |
1285 | * evict all evictable resources. In particular this means that all | |
1286 | * guest-backed resources that are registered with the device are | |
1287 | * evicted and the OTable becomes clean. | |
1288 | */ | |
1289 | void vmw_resource_evict_all(struct vmw_private *dev_priv) | |
1290 | { | |
1291 | enum vmw_res_type type; | |
1292 | ||
1293 | mutex_lock(&dev_priv->cmdbuf_mutex); | |
1294 | ||
1295 | for (type = 0; type < vmw_res_max; ++type) | |
1296 | vmw_resource_evict_type(dev_priv, type); | |
1297 | ||
1298 | mutex_unlock(&dev_priv->cmdbuf_mutex); | |
1299 | } |