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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" | |
29 | #include "vmwgfx_drm.h" | |
30 | #include "ttm/ttm_object.h" | |
31 | #include "ttm/ttm_placement.h" | |
32 | #include "drmP.h" | |
33 | ||
34 | #define VMW_RES_CONTEXT ttm_driver_type0 | |
35 | #define VMW_RES_SURFACE ttm_driver_type1 | |
36 | #define VMW_RES_STREAM ttm_driver_type2 | |
37 | ||
38 | struct vmw_user_context { | |
39 | struct ttm_base_object base; | |
40 | struct vmw_resource res; | |
41 | }; | |
42 | ||
43 | struct vmw_user_surface { | |
44 | struct ttm_base_object base; | |
45 | struct vmw_surface srf; | |
46 | }; | |
47 | ||
48 | struct vmw_user_dma_buffer { | |
49 | struct ttm_base_object base; | |
50 | struct vmw_dma_buffer dma; | |
51 | }; | |
52 | ||
53 | struct vmw_bo_user_rep { | |
54 | uint32_t handle; | |
55 | uint64_t map_handle; | |
56 | }; | |
57 | ||
58 | struct vmw_stream { | |
59 | struct vmw_resource res; | |
60 | uint32_t stream_id; | |
61 | }; | |
62 | ||
63 | struct vmw_user_stream { | |
64 | struct ttm_base_object base; | |
65 | struct vmw_stream stream; | |
66 | }; | |
67 | ||
68 | static inline struct vmw_dma_buffer * | |
69 | vmw_dma_buffer(struct ttm_buffer_object *bo) | |
70 | { | |
71 | return container_of(bo, struct vmw_dma_buffer, base); | |
72 | } | |
73 | ||
74 | static inline struct vmw_user_dma_buffer * | |
75 | vmw_user_dma_buffer(struct ttm_buffer_object *bo) | |
76 | { | |
77 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); | |
78 | return container_of(vmw_bo, struct vmw_user_dma_buffer, dma); | |
79 | } | |
80 | ||
81 | struct vmw_resource *vmw_resource_reference(struct vmw_resource *res) | |
82 | { | |
83 | kref_get(&res->kref); | |
84 | return res; | |
85 | } | |
86 | ||
87 | static void vmw_resource_release(struct kref *kref) | |
88 | { | |
89 | struct vmw_resource *res = | |
90 | container_of(kref, struct vmw_resource, kref); | |
91 | struct vmw_private *dev_priv = res->dev_priv; | |
92 | ||
93 | idr_remove(res->idr, res->id); | |
94 | write_unlock(&dev_priv->resource_lock); | |
95 | ||
96 | if (likely(res->hw_destroy != NULL)) | |
97 | res->hw_destroy(res); | |
98 | ||
99 | if (res->res_free != NULL) | |
100 | res->res_free(res); | |
101 | else | |
102 | kfree(res); | |
103 | ||
104 | write_lock(&dev_priv->resource_lock); | |
105 | } | |
106 | ||
107 | void vmw_resource_unreference(struct vmw_resource **p_res) | |
108 | { | |
109 | struct vmw_resource *res = *p_res; | |
110 | struct vmw_private *dev_priv = res->dev_priv; | |
111 | ||
112 | *p_res = NULL; | |
113 | write_lock(&dev_priv->resource_lock); | |
114 | kref_put(&res->kref, vmw_resource_release); | |
115 | write_unlock(&dev_priv->resource_lock); | |
116 | } | |
117 | ||
118 | static int vmw_resource_init(struct vmw_private *dev_priv, | |
119 | struct vmw_resource *res, | |
120 | struct idr *idr, | |
121 | enum ttm_object_type obj_type, | |
122 | void (*res_free) (struct vmw_resource *res)) | |
123 | { | |
124 | int ret; | |
125 | ||
126 | kref_init(&res->kref); | |
127 | res->hw_destroy = NULL; | |
128 | res->res_free = res_free; | |
129 | res->res_type = obj_type; | |
130 | res->idr = idr; | |
131 | res->avail = false; | |
132 | res->dev_priv = dev_priv; | |
133 | ||
134 | do { | |
135 | if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0)) | |
136 | return -ENOMEM; | |
137 | ||
138 | write_lock(&dev_priv->resource_lock); | |
139 | ret = idr_get_new_above(idr, res, 1, &res->id); | |
140 | write_unlock(&dev_priv->resource_lock); | |
141 | ||
142 | } while (ret == -EAGAIN); | |
143 | ||
144 | return ret; | |
145 | } | |
146 | ||
147 | /** | |
148 | * vmw_resource_activate | |
149 | * | |
150 | * @res: Pointer to the newly created resource | |
151 | * @hw_destroy: Destroy function. NULL if none. | |
152 | * | |
153 | * Activate a resource after the hardware has been made aware of it. | |
154 | * Set tye destroy function to @destroy. Typically this frees the | |
155 | * resource and destroys the hardware resources associated with it. | |
156 | * Activate basically means that the function vmw_resource_lookup will | |
157 | * find it. | |
158 | */ | |
159 | ||
160 | static void vmw_resource_activate(struct vmw_resource *res, | |
161 | void (*hw_destroy) (struct vmw_resource *)) | |
162 | { | |
163 | struct vmw_private *dev_priv = res->dev_priv; | |
164 | ||
165 | write_lock(&dev_priv->resource_lock); | |
166 | res->avail = true; | |
167 | res->hw_destroy = hw_destroy; | |
168 | write_unlock(&dev_priv->resource_lock); | |
169 | } | |
170 | ||
171 | struct vmw_resource *vmw_resource_lookup(struct vmw_private *dev_priv, | |
172 | struct idr *idr, int id) | |
173 | { | |
174 | struct vmw_resource *res; | |
175 | ||
176 | read_lock(&dev_priv->resource_lock); | |
177 | res = idr_find(idr, id); | |
178 | if (res && res->avail) | |
179 | kref_get(&res->kref); | |
180 | else | |
181 | res = NULL; | |
182 | read_unlock(&dev_priv->resource_lock); | |
183 | ||
184 | if (unlikely(res == NULL)) | |
185 | return NULL; | |
186 | ||
187 | return res; | |
188 | } | |
189 | ||
190 | /** | |
191 | * Context management: | |
192 | */ | |
193 | ||
194 | static void vmw_hw_context_destroy(struct vmw_resource *res) | |
195 | { | |
196 | ||
197 | struct vmw_private *dev_priv = res->dev_priv; | |
198 | struct { | |
199 | SVGA3dCmdHeader header; | |
200 | SVGA3dCmdDestroyContext body; | |
201 | } *cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); | |
202 | ||
203 | if (unlikely(cmd == NULL)) { | |
204 | DRM_ERROR("Failed reserving FIFO space for surface " | |
205 | "destruction.\n"); | |
206 | return; | |
207 | } | |
208 | ||
209 | cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DESTROY); | |
210 | cmd->header.size = cpu_to_le32(sizeof(cmd->body)); | |
211 | cmd->body.cid = cpu_to_le32(res->id); | |
212 | ||
213 | vmw_fifo_commit(dev_priv, sizeof(*cmd)); | |
30c78bb8 | 214 | vmw_3d_resource_dec(dev_priv); |
fb1d9738 JB |
215 | } |
216 | ||
217 | static int vmw_context_init(struct vmw_private *dev_priv, | |
218 | struct vmw_resource *res, | |
219 | void (*res_free) (struct vmw_resource *res)) | |
220 | { | |
221 | int ret; | |
222 | ||
223 | struct { | |
224 | SVGA3dCmdHeader header; | |
225 | SVGA3dCmdDefineContext body; | |
226 | } *cmd; | |
227 | ||
228 | ret = vmw_resource_init(dev_priv, res, &dev_priv->context_idr, | |
229 | VMW_RES_CONTEXT, res_free); | |
230 | ||
231 | if (unlikely(ret != 0)) { | |
232 | if (res_free == NULL) | |
233 | kfree(res); | |
234 | else | |
235 | res_free(res); | |
236 | return ret; | |
237 | } | |
238 | ||
239 | cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); | |
240 | if (unlikely(cmd == NULL)) { | |
241 | DRM_ERROR("Fifo reserve failed.\n"); | |
242 | vmw_resource_unreference(&res); | |
243 | return -ENOMEM; | |
244 | } | |
245 | ||
246 | cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DEFINE); | |
247 | cmd->header.size = cpu_to_le32(sizeof(cmd->body)); | |
248 | cmd->body.cid = cpu_to_le32(res->id); | |
249 | ||
250 | vmw_fifo_commit(dev_priv, sizeof(*cmd)); | |
30c78bb8 | 251 | (void) vmw_3d_resource_inc(dev_priv); |
fb1d9738 JB |
252 | vmw_resource_activate(res, vmw_hw_context_destroy); |
253 | return 0; | |
254 | } | |
255 | ||
256 | struct vmw_resource *vmw_context_alloc(struct vmw_private *dev_priv) | |
257 | { | |
258 | struct vmw_resource *res = kmalloc(sizeof(*res), GFP_KERNEL); | |
259 | int ret; | |
260 | ||
261 | if (unlikely(res == NULL)) | |
262 | return NULL; | |
263 | ||
264 | ret = vmw_context_init(dev_priv, res, NULL); | |
265 | return (ret == 0) ? res : NULL; | |
266 | } | |
267 | ||
268 | /** | |
269 | * User-space context management: | |
270 | */ | |
271 | ||
272 | static void vmw_user_context_free(struct vmw_resource *res) | |
273 | { | |
274 | struct vmw_user_context *ctx = | |
275 | container_of(res, struct vmw_user_context, res); | |
276 | ||
277 | kfree(ctx); | |
278 | } | |
279 | ||
280 | /** | |
281 | * This function is called when user space has no more references on the | |
282 | * base object. It releases the base-object's reference on the resource object. | |
283 | */ | |
284 | ||
285 | static void vmw_user_context_base_release(struct ttm_base_object **p_base) | |
286 | { | |
287 | struct ttm_base_object *base = *p_base; | |
288 | struct vmw_user_context *ctx = | |
289 | container_of(base, struct vmw_user_context, base); | |
290 | struct vmw_resource *res = &ctx->res; | |
291 | ||
292 | *p_base = NULL; | |
293 | vmw_resource_unreference(&res); | |
294 | } | |
295 | ||
296 | int vmw_context_destroy_ioctl(struct drm_device *dev, void *data, | |
297 | struct drm_file *file_priv) | |
298 | { | |
299 | struct vmw_private *dev_priv = vmw_priv(dev); | |
300 | struct vmw_resource *res; | |
301 | struct vmw_user_context *ctx; | |
302 | struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data; | |
303 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
304 | int ret = 0; | |
305 | ||
306 | res = vmw_resource_lookup(dev_priv, &dev_priv->context_idr, arg->cid); | |
307 | if (unlikely(res == NULL)) | |
308 | return -EINVAL; | |
309 | ||
310 | if (res->res_free != &vmw_user_context_free) { | |
311 | ret = -EINVAL; | |
312 | goto out; | |
313 | } | |
314 | ||
315 | ctx = container_of(res, struct vmw_user_context, res); | |
316 | if (ctx->base.tfile != tfile && !ctx->base.shareable) { | |
317 | ret = -EPERM; | |
318 | goto out; | |
319 | } | |
320 | ||
321 | ttm_ref_object_base_unref(tfile, ctx->base.hash.key, TTM_REF_USAGE); | |
322 | out: | |
323 | vmw_resource_unreference(&res); | |
324 | return ret; | |
325 | } | |
326 | ||
327 | int vmw_context_define_ioctl(struct drm_device *dev, void *data, | |
328 | struct drm_file *file_priv) | |
329 | { | |
330 | struct vmw_private *dev_priv = vmw_priv(dev); | |
331 | struct vmw_user_context *ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); | |
332 | struct vmw_resource *res; | |
333 | struct vmw_resource *tmp; | |
334 | struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data; | |
335 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
336 | int ret; | |
337 | ||
338 | if (unlikely(ctx == NULL)) | |
339 | return -ENOMEM; | |
340 | ||
341 | res = &ctx->res; | |
342 | ctx->base.shareable = false; | |
343 | ctx->base.tfile = NULL; | |
344 | ||
345 | ret = vmw_context_init(dev_priv, res, vmw_user_context_free); | |
346 | if (unlikely(ret != 0)) | |
347 | return ret; | |
348 | ||
349 | tmp = vmw_resource_reference(&ctx->res); | |
350 | ret = ttm_base_object_init(tfile, &ctx->base, false, VMW_RES_CONTEXT, | |
351 | &vmw_user_context_base_release, NULL); | |
352 | ||
353 | if (unlikely(ret != 0)) { | |
354 | vmw_resource_unreference(&tmp); | |
355 | goto out_err; | |
356 | } | |
357 | ||
358 | arg->cid = res->id; | |
359 | out_err: | |
360 | vmw_resource_unreference(&res); | |
361 | return ret; | |
362 | ||
363 | } | |
364 | ||
365 | int vmw_context_check(struct vmw_private *dev_priv, | |
366 | struct ttm_object_file *tfile, | |
367 | int id) | |
368 | { | |
369 | struct vmw_resource *res; | |
370 | int ret = 0; | |
371 | ||
372 | read_lock(&dev_priv->resource_lock); | |
373 | res = idr_find(&dev_priv->context_idr, id); | |
374 | if (res && res->avail) { | |
375 | struct vmw_user_context *ctx = | |
376 | container_of(res, struct vmw_user_context, res); | |
377 | if (ctx->base.tfile != tfile && !ctx->base.shareable) | |
378 | ret = -EPERM; | |
379 | } else | |
380 | ret = -EINVAL; | |
381 | read_unlock(&dev_priv->resource_lock); | |
382 | ||
383 | return ret; | |
384 | } | |
385 | ||
386 | ||
387 | /** | |
388 | * Surface management. | |
389 | */ | |
390 | ||
391 | static void vmw_hw_surface_destroy(struct vmw_resource *res) | |
392 | { | |
393 | ||
394 | struct vmw_private *dev_priv = res->dev_priv; | |
395 | struct { | |
396 | SVGA3dCmdHeader header; | |
397 | SVGA3dCmdDestroySurface body; | |
398 | } *cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); | |
399 | ||
400 | if (unlikely(cmd == NULL)) { | |
401 | DRM_ERROR("Failed reserving FIFO space for surface " | |
402 | "destruction.\n"); | |
403 | return; | |
404 | } | |
405 | ||
406 | cmd->header.id = cpu_to_le32(SVGA_3D_CMD_SURFACE_DESTROY); | |
407 | cmd->header.size = cpu_to_le32(sizeof(cmd->body)); | |
408 | cmd->body.sid = cpu_to_le32(res->id); | |
409 | ||
410 | vmw_fifo_commit(dev_priv, sizeof(*cmd)); | |
30c78bb8 | 411 | vmw_3d_resource_dec(dev_priv); |
fb1d9738 JB |
412 | } |
413 | ||
414 | void vmw_surface_res_free(struct vmw_resource *res) | |
415 | { | |
416 | struct vmw_surface *srf = container_of(res, struct vmw_surface, res); | |
417 | ||
418 | kfree(srf->sizes); | |
419 | kfree(srf->snooper.image); | |
420 | kfree(srf); | |
421 | } | |
422 | ||
423 | int vmw_surface_init(struct vmw_private *dev_priv, | |
424 | struct vmw_surface *srf, | |
425 | void (*res_free) (struct vmw_resource *res)) | |
426 | { | |
427 | int ret; | |
428 | struct { | |
429 | SVGA3dCmdHeader header; | |
430 | SVGA3dCmdDefineSurface body; | |
431 | } *cmd; | |
432 | SVGA3dSize *cmd_size; | |
433 | struct vmw_resource *res = &srf->res; | |
434 | struct drm_vmw_size *src_size; | |
435 | size_t submit_size; | |
436 | uint32_t cmd_len; | |
437 | int i; | |
438 | ||
439 | BUG_ON(res_free == NULL); | |
440 | ret = vmw_resource_init(dev_priv, res, &dev_priv->surface_idr, | |
441 | VMW_RES_SURFACE, res_free); | |
442 | ||
443 | if (unlikely(ret != 0)) { | |
444 | res_free(res); | |
445 | return ret; | |
446 | } | |
447 | ||
448 | submit_size = sizeof(*cmd) + srf->num_sizes * sizeof(SVGA3dSize); | |
449 | cmd_len = sizeof(cmd->body) + srf->num_sizes * sizeof(SVGA3dSize); | |
450 | ||
451 | cmd = vmw_fifo_reserve(dev_priv, submit_size); | |
452 | if (unlikely(cmd == NULL)) { | |
453 | DRM_ERROR("Fifo reserve failed for create surface.\n"); | |
454 | vmw_resource_unreference(&res); | |
455 | return -ENOMEM; | |
456 | } | |
457 | ||
458 | cmd->header.id = cpu_to_le32(SVGA_3D_CMD_SURFACE_DEFINE); | |
459 | cmd->header.size = cpu_to_le32(cmd_len); | |
460 | cmd->body.sid = cpu_to_le32(res->id); | |
461 | cmd->body.surfaceFlags = cpu_to_le32(srf->flags); | |
462 | cmd->body.format = cpu_to_le32(srf->format); | |
463 | for (i = 0; i < DRM_VMW_MAX_SURFACE_FACES; ++i) { | |
464 | cmd->body.face[i].numMipLevels = | |
465 | cpu_to_le32(srf->mip_levels[i]); | |
466 | } | |
467 | ||
468 | cmd += 1; | |
469 | cmd_size = (SVGA3dSize *) cmd; | |
470 | src_size = srf->sizes; | |
471 | ||
472 | for (i = 0; i < srf->num_sizes; ++i, cmd_size++, src_size++) { | |
473 | cmd_size->width = cpu_to_le32(src_size->width); | |
474 | cmd_size->height = cpu_to_le32(src_size->height); | |
475 | cmd_size->depth = cpu_to_le32(src_size->depth); | |
476 | } | |
477 | ||
478 | vmw_fifo_commit(dev_priv, submit_size); | |
30c78bb8 | 479 | (void) vmw_3d_resource_inc(dev_priv); |
fb1d9738 JB |
480 | vmw_resource_activate(res, vmw_hw_surface_destroy); |
481 | return 0; | |
482 | } | |
483 | ||
484 | static void vmw_user_surface_free(struct vmw_resource *res) | |
485 | { | |
486 | struct vmw_surface *srf = container_of(res, struct vmw_surface, res); | |
487 | struct vmw_user_surface *user_srf = | |
488 | container_of(srf, struct vmw_user_surface, srf); | |
489 | ||
490 | kfree(srf->sizes); | |
491 | kfree(srf->snooper.image); | |
492 | kfree(user_srf); | |
493 | } | |
494 | ||
7a73ba74 TH |
495 | int vmw_user_surface_lookup_handle(struct vmw_private *dev_priv, |
496 | struct ttm_object_file *tfile, | |
497 | uint32_t handle, struct vmw_surface **out) | |
fb1d9738 JB |
498 | { |
499 | struct vmw_resource *res; | |
500 | struct vmw_surface *srf; | |
501 | struct vmw_user_surface *user_srf; | |
7a73ba74 TH |
502 | struct ttm_base_object *base; |
503 | int ret = -EINVAL; | |
fb1d9738 | 504 | |
7a73ba74 TH |
505 | base = ttm_base_object_lookup(tfile, handle); |
506 | if (unlikely(base == NULL)) | |
fb1d9738 JB |
507 | return -EINVAL; |
508 | ||
7a73ba74 TH |
509 | if (unlikely(base->object_type != VMW_RES_SURFACE)) |
510 | goto out_bad_resource; | |
511 | ||
512 | user_srf = container_of(base, struct vmw_user_surface, base); | |
513 | srf = &user_srf->srf; | |
514 | res = &srf->res; | |
515 | ||
516 | read_lock(&dev_priv->resource_lock); | |
517 | ||
518 | if (!res->avail || res->res_free != &vmw_user_surface_free) { | |
519 | read_unlock(&dev_priv->resource_lock); | |
520 | goto out_bad_resource; | |
521 | } | |
fb1d9738 | 522 | |
7a73ba74 TH |
523 | kref_get(&res->kref); |
524 | read_unlock(&dev_priv->resource_lock); | |
fb1d9738 JB |
525 | |
526 | *out = srf; | |
7a73ba74 TH |
527 | ret = 0; |
528 | ||
529 | out_bad_resource: | |
530 | ttm_base_object_unref(&base); | |
531 | ||
532 | return ret; | |
fb1d9738 JB |
533 | } |
534 | ||
535 | static void vmw_user_surface_base_release(struct ttm_base_object **p_base) | |
536 | { | |
537 | struct ttm_base_object *base = *p_base; | |
538 | struct vmw_user_surface *user_srf = | |
539 | container_of(base, struct vmw_user_surface, base); | |
540 | struct vmw_resource *res = &user_srf->srf.res; | |
541 | ||
542 | *p_base = NULL; | |
543 | vmw_resource_unreference(&res); | |
544 | } | |
545 | ||
546 | int vmw_surface_destroy_ioctl(struct drm_device *dev, void *data, | |
547 | struct drm_file *file_priv) | |
548 | { | |
fb1d9738 JB |
549 | struct drm_vmw_surface_arg *arg = (struct drm_vmw_surface_arg *)data; |
550 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
fb1d9738 | 551 | |
7a73ba74 | 552 | return ttm_ref_object_base_unref(tfile, arg->sid, TTM_REF_USAGE); |
fb1d9738 JB |
553 | } |
554 | ||
555 | int vmw_surface_define_ioctl(struct drm_device *dev, void *data, | |
556 | struct drm_file *file_priv) | |
557 | { | |
558 | struct vmw_private *dev_priv = vmw_priv(dev); | |
559 | struct vmw_user_surface *user_srf = | |
560 | kmalloc(sizeof(*user_srf), GFP_KERNEL); | |
561 | struct vmw_surface *srf; | |
562 | struct vmw_resource *res; | |
563 | struct vmw_resource *tmp; | |
564 | union drm_vmw_surface_create_arg *arg = | |
565 | (union drm_vmw_surface_create_arg *)data; | |
566 | struct drm_vmw_surface_create_req *req = &arg->req; | |
567 | struct drm_vmw_surface_arg *rep = &arg->rep; | |
568 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
569 | struct drm_vmw_size __user *user_sizes; | |
570 | int ret; | |
571 | int i; | |
572 | ||
573 | if (unlikely(user_srf == NULL)) | |
574 | return -ENOMEM; | |
575 | ||
576 | srf = &user_srf->srf; | |
577 | res = &srf->res; | |
578 | ||
579 | srf->flags = req->flags; | |
580 | srf->format = req->format; | |
a87897ed | 581 | srf->scanout = req->scanout; |
fb1d9738 JB |
582 | memcpy(srf->mip_levels, req->mip_levels, sizeof(srf->mip_levels)); |
583 | srf->num_sizes = 0; | |
584 | for (i = 0; i < DRM_VMW_MAX_SURFACE_FACES; ++i) | |
585 | srf->num_sizes += srf->mip_levels[i]; | |
586 | ||
587 | if (srf->num_sizes > DRM_VMW_MAX_SURFACE_FACES * | |
588 | DRM_VMW_MAX_MIP_LEVELS) { | |
589 | ret = -EINVAL; | |
590 | goto out_err0; | |
591 | } | |
592 | ||
593 | srf->sizes = kmalloc(srf->num_sizes * sizeof(*srf->sizes), GFP_KERNEL); | |
594 | if (unlikely(srf->sizes == NULL)) { | |
595 | ret = -ENOMEM; | |
596 | goto out_err0; | |
597 | } | |
598 | ||
599 | user_sizes = (struct drm_vmw_size __user *)(unsigned long) | |
600 | req->size_addr; | |
601 | ||
602 | ret = copy_from_user(srf->sizes, user_sizes, | |
603 | srf->num_sizes * sizeof(*srf->sizes)); | |
9b8eb4d1 DC |
604 | if (unlikely(ret != 0)) { |
605 | ret = -EFAULT; | |
fb1d9738 | 606 | goto out_err1; |
9b8eb4d1 | 607 | } |
fb1d9738 | 608 | |
5ffdb658 | 609 | if (srf->scanout && |
50ec3b7c TH |
610 | srf->num_sizes == 1 && |
611 | srf->sizes[0].width == 64 && | |
612 | srf->sizes[0].height == 64 && | |
613 | srf->format == SVGA3D_A8R8G8B8) { | |
614 | ||
615 | srf->snooper.image = kmalloc(64 * 64 * 4, GFP_KERNEL); | |
616 | /* clear the image */ | |
617 | if (srf->snooper.image) { | |
618 | memset(srf->snooper.image, 0x00, 64 * 64 * 4); | |
619 | } else { | |
620 | DRM_ERROR("Failed to allocate cursor_image\n"); | |
621 | ret = -ENOMEM; | |
622 | goto out_err1; | |
623 | } | |
624 | } else { | |
625 | srf->snooper.image = NULL; | |
626 | } | |
627 | srf->snooper.crtc = NULL; | |
628 | ||
fb1d9738 JB |
629 | user_srf->base.shareable = false; |
630 | user_srf->base.tfile = NULL; | |
631 | ||
632 | /** | |
633 | * From this point, the generic resource management functions | |
634 | * destroy the object on failure. | |
635 | */ | |
636 | ||
637 | ret = vmw_surface_init(dev_priv, srf, vmw_user_surface_free); | |
638 | if (unlikely(ret != 0)) | |
639 | return ret; | |
640 | ||
641 | tmp = vmw_resource_reference(&srf->res); | |
642 | ret = ttm_base_object_init(tfile, &user_srf->base, | |
643 | req->shareable, VMW_RES_SURFACE, | |
644 | &vmw_user_surface_base_release, NULL); | |
645 | ||
646 | if (unlikely(ret != 0)) { | |
647 | vmw_resource_unreference(&tmp); | |
648 | vmw_resource_unreference(&res); | |
649 | return ret; | |
650 | } | |
651 | ||
7a73ba74 TH |
652 | rep->sid = user_srf->base.hash.key; |
653 | if (rep->sid == SVGA3D_INVALID_ID) | |
654 | DRM_ERROR("Created bad Surface ID.\n"); | |
655 | ||
fb1d9738 JB |
656 | vmw_resource_unreference(&res); |
657 | return 0; | |
658 | out_err1: | |
659 | kfree(srf->sizes); | |
660 | out_err0: | |
661 | kfree(user_srf); | |
662 | return ret; | |
663 | } | |
664 | ||
665 | int vmw_surface_reference_ioctl(struct drm_device *dev, void *data, | |
666 | struct drm_file *file_priv) | |
667 | { | |
fb1d9738 JB |
668 | union drm_vmw_surface_reference_arg *arg = |
669 | (union drm_vmw_surface_reference_arg *)data; | |
670 | struct drm_vmw_surface_arg *req = &arg->req; | |
671 | struct drm_vmw_surface_create_req *rep = &arg->rep; | |
672 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
fb1d9738 JB |
673 | struct vmw_surface *srf; |
674 | struct vmw_user_surface *user_srf; | |
675 | struct drm_vmw_size __user *user_sizes; | |
7a73ba74 TH |
676 | struct ttm_base_object *base; |
677 | int ret = -EINVAL; | |
fb1d9738 | 678 | |
7a73ba74 TH |
679 | base = ttm_base_object_lookup(tfile, req->sid); |
680 | if (unlikely(base == NULL)) { | |
681 | DRM_ERROR("Could not find surface to reference.\n"); | |
fb1d9738 | 682 | return -EINVAL; |
fb1d9738 JB |
683 | } |
684 | ||
7a73ba74 TH |
685 | if (unlikely(base->object_type != VMW_RES_SURFACE)) |
686 | goto out_bad_resource; | |
687 | ||
688 | user_srf = container_of(base, struct vmw_user_surface, base); | |
689 | srf = &user_srf->srf; | |
fb1d9738 JB |
690 | |
691 | ret = ttm_ref_object_add(tfile, &user_srf->base, TTM_REF_USAGE, NULL); | |
692 | if (unlikely(ret != 0)) { | |
693 | DRM_ERROR("Could not add a reference to a surface.\n"); | |
7a73ba74 | 694 | goto out_no_reference; |
fb1d9738 JB |
695 | } |
696 | ||
697 | rep->flags = srf->flags; | |
698 | rep->format = srf->format; | |
699 | memcpy(rep->mip_levels, srf->mip_levels, sizeof(srf->mip_levels)); | |
700 | user_sizes = (struct drm_vmw_size __user *)(unsigned long) | |
701 | rep->size_addr; | |
702 | ||
703 | if (user_sizes) | |
704 | ret = copy_to_user(user_sizes, srf->sizes, | |
705 | srf->num_sizes * sizeof(*srf->sizes)); | |
9b8eb4d1 | 706 | if (unlikely(ret != 0)) { |
fb1d9738 JB |
707 | DRM_ERROR("copy_to_user failed %p %u\n", |
708 | user_sizes, srf->num_sizes); | |
9b8eb4d1 DC |
709 | ret = -EFAULT; |
710 | } | |
7a73ba74 TH |
711 | out_bad_resource: |
712 | out_no_reference: | |
713 | ttm_base_object_unref(&base); | |
714 | ||
fb1d9738 JB |
715 | return ret; |
716 | } | |
717 | ||
718 | int vmw_surface_check(struct vmw_private *dev_priv, | |
719 | struct ttm_object_file *tfile, | |
7a73ba74 | 720 | uint32_t handle, int *id) |
fb1d9738 | 721 | { |
7a73ba74 TH |
722 | struct ttm_base_object *base; |
723 | struct vmw_user_surface *user_srf; | |
fb1d9738 | 724 | |
7a73ba74 | 725 | int ret = -EPERM; |
fb1d9738 | 726 | |
7a73ba74 TH |
727 | base = ttm_base_object_lookup(tfile, handle); |
728 | if (unlikely(base == NULL)) | |
729 | return -EINVAL; | |
730 | ||
731 | if (unlikely(base->object_type != VMW_RES_SURFACE)) | |
732 | goto out_bad_surface; | |
733 | ||
734 | user_srf = container_of(base, struct vmw_user_surface, base); | |
735 | *id = user_srf->srf.res.id; | |
736 | ret = 0; | |
737 | ||
738 | out_bad_surface: | |
739 | /** | |
740 | * FIXME: May deadlock here when called from the | |
741 | * command parsing code. | |
742 | */ | |
fb1d9738 | 743 | |
7a73ba74 | 744 | ttm_base_object_unref(&base); |
fb1d9738 JB |
745 | return ret; |
746 | } | |
747 | ||
748 | /** | |
749 | * Buffer management. | |
750 | */ | |
751 | ||
752 | static size_t vmw_dmabuf_acc_size(struct ttm_bo_global *glob, | |
753 | unsigned long num_pages) | |
754 | { | |
755 | static size_t bo_user_size = ~0; | |
756 | ||
757 | size_t page_array_size = | |
758 | (num_pages * sizeof(void *) + PAGE_SIZE - 1) & PAGE_MASK; | |
759 | ||
760 | if (unlikely(bo_user_size == ~0)) { | |
761 | bo_user_size = glob->ttm_bo_extra_size + | |
762 | ttm_round_pot(sizeof(struct vmw_dma_buffer)); | |
763 | } | |
764 | ||
765 | return bo_user_size + page_array_size; | |
766 | } | |
767 | ||
effe1105 TH |
768 | void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo) |
769 | { | |
770 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); | |
771 | struct ttm_bo_global *glob = bo->glob; | |
772 | ||
effe1105 | 773 | ttm_mem_global_free(glob->mem_glob, bo->acc_size); |
fb1d9738 JB |
774 | kfree(vmw_bo); |
775 | } | |
776 | ||
777 | int vmw_dmabuf_init(struct vmw_private *dev_priv, | |
778 | struct vmw_dma_buffer *vmw_bo, | |
779 | size_t size, struct ttm_placement *placement, | |
780 | bool interruptible, | |
781 | void (*bo_free) (struct ttm_buffer_object *bo)) | |
782 | { | |
783 | struct ttm_bo_device *bdev = &dev_priv->bdev; | |
784 | struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; | |
785 | size_t acc_size; | |
786 | int ret; | |
787 | ||
788 | BUG_ON(!bo_free); | |
789 | ||
790 | acc_size = | |
791 | vmw_dmabuf_acc_size(bdev->glob, | |
792 | (size + PAGE_SIZE - 1) >> PAGE_SHIFT); | |
793 | ||
794 | ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); | |
795 | if (unlikely(ret != 0)) { | |
796 | /* we must free the bo here as | |
797 | * ttm_buffer_object_init does so as well */ | |
798 | bo_free(&vmw_bo->base); | |
799 | return ret; | |
800 | } | |
801 | ||
802 | memset(vmw_bo, 0, sizeof(*vmw_bo)); | |
803 | ||
fb1d9738 | 804 | INIT_LIST_HEAD(&vmw_bo->validate_list); |
fb1d9738 JB |
805 | |
806 | ret = ttm_bo_init(bdev, &vmw_bo->base, size, | |
807 | ttm_bo_type_device, placement, | |
808 | 0, 0, interruptible, | |
809 | NULL, acc_size, bo_free); | |
810 | return ret; | |
811 | } | |
812 | ||
813 | static void vmw_user_dmabuf_destroy(struct ttm_buffer_object *bo) | |
814 | { | |
815 | struct vmw_user_dma_buffer *vmw_user_bo = vmw_user_dma_buffer(bo); | |
fb1d9738 | 816 | struct ttm_bo_global *glob = bo->glob; |
fb1d9738 JB |
817 | |
818 | ttm_mem_global_free(glob->mem_glob, bo->acc_size); | |
fb1d9738 JB |
819 | kfree(vmw_user_bo); |
820 | } | |
821 | ||
822 | static void vmw_user_dmabuf_release(struct ttm_base_object **p_base) | |
823 | { | |
824 | struct vmw_user_dma_buffer *vmw_user_bo; | |
825 | struct ttm_base_object *base = *p_base; | |
826 | struct ttm_buffer_object *bo; | |
827 | ||
828 | *p_base = NULL; | |
829 | ||
830 | if (unlikely(base == NULL)) | |
831 | return; | |
832 | ||
833 | vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base); | |
834 | bo = &vmw_user_bo->dma.base; | |
835 | ttm_bo_unref(&bo); | |
836 | } | |
837 | ||
838 | int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data, | |
839 | struct drm_file *file_priv) | |
840 | { | |
841 | struct vmw_private *dev_priv = vmw_priv(dev); | |
842 | union drm_vmw_alloc_dmabuf_arg *arg = | |
843 | (union drm_vmw_alloc_dmabuf_arg *)data; | |
844 | struct drm_vmw_alloc_dmabuf_req *req = &arg->req; | |
845 | struct drm_vmw_dmabuf_rep *rep = &arg->rep; | |
846 | struct vmw_user_dma_buffer *vmw_user_bo; | |
847 | struct ttm_buffer_object *tmp; | |
848 | struct vmw_master *vmaster = vmw_master(file_priv->master); | |
849 | int ret; | |
850 | ||
851 | vmw_user_bo = kzalloc(sizeof(*vmw_user_bo), GFP_KERNEL); | |
852 | if (unlikely(vmw_user_bo == NULL)) | |
853 | return -ENOMEM; | |
854 | ||
855 | ret = ttm_read_lock(&vmaster->lock, true); | |
856 | if (unlikely(ret != 0)) { | |
857 | kfree(vmw_user_bo); | |
858 | return ret; | |
859 | } | |
860 | ||
861 | ret = vmw_dmabuf_init(dev_priv, &vmw_user_bo->dma, req->size, | |
8ba5152a | 862 | &vmw_vram_sys_placement, true, |
fb1d9738 JB |
863 | &vmw_user_dmabuf_destroy); |
864 | if (unlikely(ret != 0)) | |
2f5993cc | 865 | goto out_no_dmabuf; |
fb1d9738 JB |
866 | |
867 | tmp = ttm_bo_reference(&vmw_user_bo->dma.base); | |
868 | ret = ttm_base_object_init(vmw_fpriv(file_priv)->tfile, | |
869 | &vmw_user_bo->base, | |
870 | false, | |
871 | ttm_buffer_type, | |
872 | &vmw_user_dmabuf_release, NULL); | |
2f5993cc TH |
873 | if (unlikely(ret != 0)) |
874 | goto out_no_base_object; | |
875 | else { | |
fb1d9738 JB |
876 | rep->handle = vmw_user_bo->base.hash.key; |
877 | rep->map_handle = vmw_user_bo->dma.base.addr_space_offset; | |
878 | rep->cur_gmr_id = vmw_user_bo->base.hash.key; | |
879 | rep->cur_gmr_offset = 0; | |
880 | } | |
fb1d9738 | 881 | |
2f5993cc TH |
882 | out_no_base_object: |
883 | ttm_bo_unref(&tmp); | |
884 | out_no_dmabuf: | |
fb1d9738 JB |
885 | ttm_read_unlock(&vmaster->lock); |
886 | ||
2f5993cc | 887 | return ret; |
fb1d9738 JB |
888 | } |
889 | ||
890 | int vmw_dmabuf_unref_ioctl(struct drm_device *dev, void *data, | |
891 | struct drm_file *file_priv) | |
892 | { | |
893 | struct drm_vmw_unref_dmabuf_arg *arg = | |
894 | (struct drm_vmw_unref_dmabuf_arg *)data; | |
895 | ||
896 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, | |
897 | arg->handle, | |
898 | TTM_REF_USAGE); | |
899 | } | |
900 | ||
901 | uint32_t vmw_dmabuf_validate_node(struct ttm_buffer_object *bo, | |
902 | uint32_t cur_validate_node) | |
903 | { | |
904 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); | |
905 | ||
906 | if (likely(vmw_bo->on_validate_list)) | |
907 | return vmw_bo->cur_validate_node; | |
908 | ||
909 | vmw_bo->cur_validate_node = cur_validate_node; | |
910 | vmw_bo->on_validate_list = true; | |
911 | ||
912 | return cur_validate_node; | |
913 | } | |
914 | ||
915 | void vmw_dmabuf_validate_clear(struct ttm_buffer_object *bo) | |
916 | { | |
917 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); | |
918 | ||
919 | vmw_bo->on_validate_list = false; | |
920 | } | |
921 | ||
fb1d9738 JB |
922 | int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile, |
923 | uint32_t handle, struct vmw_dma_buffer **out) | |
924 | { | |
925 | struct vmw_user_dma_buffer *vmw_user_bo; | |
926 | struct ttm_base_object *base; | |
927 | ||
928 | base = ttm_base_object_lookup(tfile, handle); | |
929 | if (unlikely(base == NULL)) { | |
930 | printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n", | |
931 | (unsigned long)handle); | |
932 | return -ESRCH; | |
933 | } | |
934 | ||
935 | if (unlikely(base->object_type != ttm_buffer_type)) { | |
936 | ttm_base_object_unref(&base); | |
937 | printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n", | |
938 | (unsigned long)handle); | |
939 | return -EINVAL; | |
940 | } | |
941 | ||
942 | vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base); | |
943 | (void)ttm_bo_reference(&vmw_user_bo->dma.base); | |
944 | ttm_base_object_unref(&base); | |
945 | *out = &vmw_user_bo->dma; | |
946 | ||
947 | return 0; | |
948 | } | |
949 | ||
fb1d9738 | 950 | /* |
65155b37 | 951 | * Stream management |
fb1d9738 JB |
952 | */ |
953 | ||
954 | static void vmw_stream_destroy(struct vmw_resource *res) | |
955 | { | |
956 | struct vmw_private *dev_priv = res->dev_priv; | |
957 | struct vmw_stream *stream; | |
958 | int ret; | |
959 | ||
960 | DRM_INFO("%s: unref\n", __func__); | |
961 | stream = container_of(res, struct vmw_stream, res); | |
962 | ||
963 | ret = vmw_overlay_unref(dev_priv, stream->stream_id); | |
964 | WARN_ON(ret != 0); | |
965 | } | |
966 | ||
967 | static int vmw_stream_init(struct vmw_private *dev_priv, | |
968 | struct vmw_stream *stream, | |
969 | void (*res_free) (struct vmw_resource *res)) | |
970 | { | |
971 | struct vmw_resource *res = &stream->res; | |
972 | int ret; | |
973 | ||
974 | ret = vmw_resource_init(dev_priv, res, &dev_priv->stream_idr, | |
975 | VMW_RES_STREAM, res_free); | |
976 | ||
977 | if (unlikely(ret != 0)) { | |
978 | if (res_free == NULL) | |
979 | kfree(stream); | |
980 | else | |
981 | res_free(&stream->res); | |
982 | return ret; | |
983 | } | |
984 | ||
985 | ret = vmw_overlay_claim(dev_priv, &stream->stream_id); | |
986 | if (ret) { | |
987 | vmw_resource_unreference(&res); | |
988 | return ret; | |
989 | } | |
990 | ||
991 | DRM_INFO("%s: claimed\n", __func__); | |
992 | ||
993 | vmw_resource_activate(&stream->res, vmw_stream_destroy); | |
994 | return 0; | |
995 | } | |
996 | ||
997 | /** | |
998 | * User-space context management: | |
999 | */ | |
1000 | ||
1001 | static void vmw_user_stream_free(struct vmw_resource *res) | |
1002 | { | |
1003 | struct vmw_user_stream *stream = | |
1004 | container_of(res, struct vmw_user_stream, stream.res); | |
1005 | ||
1006 | kfree(stream); | |
1007 | } | |
1008 | ||
1009 | /** | |
1010 | * This function is called when user space has no more references on the | |
1011 | * base object. It releases the base-object's reference on the resource object. | |
1012 | */ | |
1013 | ||
1014 | static void vmw_user_stream_base_release(struct ttm_base_object **p_base) | |
1015 | { | |
1016 | struct ttm_base_object *base = *p_base; | |
1017 | struct vmw_user_stream *stream = | |
1018 | container_of(base, struct vmw_user_stream, base); | |
1019 | struct vmw_resource *res = &stream->stream.res; | |
1020 | ||
1021 | *p_base = NULL; | |
1022 | vmw_resource_unreference(&res); | |
1023 | } | |
1024 | ||
1025 | int vmw_stream_unref_ioctl(struct drm_device *dev, void *data, | |
1026 | struct drm_file *file_priv) | |
1027 | { | |
1028 | struct vmw_private *dev_priv = vmw_priv(dev); | |
1029 | struct vmw_resource *res; | |
1030 | struct vmw_user_stream *stream; | |
1031 | struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; | |
1032 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
1033 | int ret = 0; | |
1034 | ||
1035 | res = vmw_resource_lookup(dev_priv, &dev_priv->stream_idr, arg->stream_id); | |
1036 | if (unlikely(res == NULL)) | |
1037 | return -EINVAL; | |
1038 | ||
1039 | if (res->res_free != &vmw_user_stream_free) { | |
1040 | ret = -EINVAL; | |
1041 | goto out; | |
1042 | } | |
1043 | ||
1044 | stream = container_of(res, struct vmw_user_stream, stream.res); | |
1045 | if (stream->base.tfile != tfile) { | |
1046 | ret = -EINVAL; | |
1047 | goto out; | |
1048 | } | |
1049 | ||
1050 | ttm_ref_object_base_unref(tfile, stream->base.hash.key, TTM_REF_USAGE); | |
1051 | out: | |
1052 | vmw_resource_unreference(&res); | |
1053 | return ret; | |
1054 | } | |
1055 | ||
1056 | int vmw_stream_claim_ioctl(struct drm_device *dev, void *data, | |
1057 | struct drm_file *file_priv) | |
1058 | { | |
1059 | struct vmw_private *dev_priv = vmw_priv(dev); | |
1060 | struct vmw_user_stream *stream = kmalloc(sizeof(*stream), GFP_KERNEL); | |
1061 | struct vmw_resource *res; | |
1062 | struct vmw_resource *tmp; | |
1063 | struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; | |
1064 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
1065 | int ret; | |
1066 | ||
1067 | if (unlikely(stream == NULL)) | |
1068 | return -ENOMEM; | |
1069 | ||
1070 | res = &stream->stream.res; | |
1071 | stream->base.shareable = false; | |
1072 | stream->base.tfile = NULL; | |
1073 | ||
1074 | ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free); | |
1075 | if (unlikely(ret != 0)) | |
1076 | return ret; | |
1077 | ||
1078 | tmp = vmw_resource_reference(res); | |
1079 | ret = ttm_base_object_init(tfile, &stream->base, false, VMW_RES_STREAM, | |
1080 | &vmw_user_stream_base_release, NULL); | |
1081 | ||
1082 | if (unlikely(ret != 0)) { | |
1083 | vmw_resource_unreference(&tmp); | |
1084 | goto out_err; | |
1085 | } | |
1086 | ||
1087 | arg->stream_id = res->id; | |
1088 | out_err: | |
1089 | vmw_resource_unreference(&res); | |
1090 | return ret; | |
1091 | } | |
1092 | ||
1093 | int vmw_user_stream_lookup(struct vmw_private *dev_priv, | |
1094 | struct ttm_object_file *tfile, | |
1095 | uint32_t *inout_id, struct vmw_resource **out) | |
1096 | { | |
1097 | struct vmw_user_stream *stream; | |
1098 | struct vmw_resource *res; | |
1099 | int ret; | |
1100 | ||
1101 | res = vmw_resource_lookup(dev_priv, &dev_priv->stream_idr, *inout_id); | |
1102 | if (unlikely(res == NULL)) | |
1103 | return -EINVAL; | |
1104 | ||
1105 | if (res->res_free != &vmw_user_stream_free) { | |
1106 | ret = -EINVAL; | |
1107 | goto err_ref; | |
1108 | } | |
1109 | ||
1110 | stream = container_of(res, struct vmw_user_stream, stream.res); | |
1111 | if (stream->base.tfile != tfile) { | |
1112 | ret = -EPERM; | |
1113 | goto err_ref; | |
1114 | } | |
1115 | ||
1116 | *inout_id = stream->stream.stream_id; | |
1117 | *out = res; | |
1118 | return 0; | |
1119 | err_ref: | |
1120 | vmw_resource_unreference(&res); | |
1121 | return ret; | |
1122 | } |