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fb1d9738 JB |
1 | /************************************************************************** |
2 | * | |
54fbde8a | 3 | * Copyright © 2009-2015 VMware, Inc., Palo Alto, CA., USA |
fb1d9738 JB |
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" |
d80efd5c | 34 | #include "vmwgfx_binding.h" |
fb1d9738 | 35 | |
ea029c28 TH |
36 | #define VMW_RES_EVICT_ERR_COUNT 10 |
37 | ||
fb1d9738 | 38 | struct vmw_user_dma_buffer { |
c486d4f8 | 39 | struct ttm_prime_object prime; |
fb1d9738 JB |
40 | struct vmw_dma_buffer dma; |
41 | }; | |
42 | ||
43 | struct vmw_bo_user_rep { | |
44 | uint32_t handle; | |
45 | uint64_t map_handle; | |
46 | }; | |
47 | ||
fb1d9738 JB |
48 | static inline struct vmw_dma_buffer * |
49 | vmw_dma_buffer(struct ttm_buffer_object *bo) | |
50 | { | |
51 | return container_of(bo, struct vmw_dma_buffer, base); | |
52 | } | |
53 | ||
54 | static inline struct vmw_user_dma_buffer * | |
55 | vmw_user_dma_buffer(struct ttm_buffer_object *bo) | |
56 | { | |
57 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); | |
58 | return container_of(vmw_bo, struct vmw_user_dma_buffer, dma); | |
59 | } | |
60 | ||
61 | struct vmw_resource *vmw_resource_reference(struct vmw_resource *res) | |
62 | { | |
63 | kref_get(&res->kref); | |
64 | return res; | |
65 | } | |
66 | ||
30f82d81 TH |
67 | struct vmw_resource * |
68 | vmw_resource_reference_unless_doomed(struct vmw_resource *res) | |
69 | { | |
70 | return kref_get_unless_zero(&res->kref) ? res : NULL; | |
71 | } | |
5bb39e81 TH |
72 | |
73 | /** | |
74 | * vmw_resource_release_id - release a resource id to the id manager. | |
75 | * | |
76 | * @res: Pointer to the resource. | |
77 | * | |
78 | * Release the resource id to the resource id manager and set it to -1 | |
79 | */ | |
543831cf | 80 | void vmw_resource_release_id(struct vmw_resource *res) |
5bb39e81 TH |
81 | { |
82 | struct vmw_private *dev_priv = res->dev_priv; | |
c0951b79 | 83 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
5bb39e81 TH |
84 | |
85 | write_lock(&dev_priv->resource_lock); | |
86 | if (res->id != -1) | |
c0951b79 | 87 | idr_remove(idr, res->id); |
5bb39e81 TH |
88 | res->id = -1; |
89 | write_unlock(&dev_priv->resource_lock); | |
90 | } | |
91 | ||
fb1d9738 JB |
92 | static void vmw_resource_release(struct kref *kref) |
93 | { | |
94 | struct vmw_resource *res = | |
95 | container_of(kref, struct vmw_resource, kref); | |
96 | struct vmw_private *dev_priv = res->dev_priv; | |
c0951b79 TH |
97 | int id; |
98 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; | |
fb1d9738 | 99 | |
b9eb1a61 | 100 | write_lock(&dev_priv->resource_lock); |
5bb39e81 | 101 | res->avail = false; |
c0951b79 | 102 | list_del_init(&res->lru_head); |
fb1d9738 | 103 | write_unlock(&dev_priv->resource_lock); |
c0951b79 TH |
104 | if (res->backup) { |
105 | struct ttm_buffer_object *bo = &res->backup->base; | |
106 | ||
dfd5e50e | 107 | ttm_bo_reserve(bo, false, false, NULL); |
c0951b79 TH |
108 | if (!list_empty(&res->mob_head) && |
109 | res->func->unbind != NULL) { | |
110 | struct ttm_validate_buffer val_buf; | |
111 | ||
112 | val_buf.bo = bo; | |
ae9c0af2 | 113 | val_buf.shared = false; |
c0951b79 TH |
114 | res->func->unbind(res, false, &val_buf); |
115 | } | |
116 | res->backup_dirty = false; | |
117 | list_del_init(&res->mob_head); | |
118 | ttm_bo_unreserve(bo); | |
119 | vmw_dmabuf_unreference(&res->backup); | |
120 | } | |
fb1d9738 | 121 | |
30f82d81 | 122 | if (likely(res->hw_destroy != NULL)) { |
30f82d81 | 123 | mutex_lock(&dev_priv->binding_mutex); |
d80efd5c | 124 | vmw_binding_res_list_kill(&res->binding_head); |
30f82d81 | 125 | mutex_unlock(&dev_priv->binding_mutex); |
d80efd5c | 126 | res->hw_destroy(res); |
30f82d81 | 127 | } |
fb1d9738 | 128 | |
c0951b79 | 129 | id = res->id; |
fb1d9738 JB |
130 | if (res->res_free != NULL) |
131 | res->res_free(res); | |
132 | else | |
133 | kfree(res); | |
134 | ||
135 | write_lock(&dev_priv->resource_lock); | |
5bb39e81 TH |
136 | if (id != -1) |
137 | idr_remove(idr, id); | |
b9eb1a61 | 138 | write_unlock(&dev_priv->resource_lock); |
fb1d9738 JB |
139 | } |
140 | ||
141 | void vmw_resource_unreference(struct vmw_resource **p_res) | |
142 | { | |
143 | struct vmw_resource *res = *p_res; | |
fb1d9738 JB |
144 | |
145 | *p_res = NULL; | |
fb1d9738 | 146 | kref_put(&res->kref, vmw_resource_release); |
fb1d9738 JB |
147 | } |
148 | ||
5bb39e81 TH |
149 | |
150 | /** | |
151 | * vmw_resource_alloc_id - release a resource id to the id manager. | |
152 | * | |
5bb39e81 TH |
153 | * @res: Pointer to the resource. |
154 | * | |
155 | * Allocate the lowest free resource from the resource manager, and set | |
156 | * @res->id to that id. Returns 0 on success and -ENOMEM on failure. | |
157 | */ | |
543831cf | 158 | int vmw_resource_alloc_id(struct vmw_resource *res) |
5bb39e81 | 159 | { |
c0951b79 | 160 | struct vmw_private *dev_priv = res->dev_priv; |
5bb39e81 | 161 | int ret; |
c0951b79 | 162 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
5bb39e81 TH |
163 | |
164 | BUG_ON(res->id != -1); | |
165 | ||
cc39a8fa TH |
166 | idr_preload(GFP_KERNEL); |
167 | write_lock(&dev_priv->resource_lock); | |
5bb39e81 | 168 | |
cc39a8fa TH |
169 | ret = idr_alloc(idr, res, 1, 0, GFP_NOWAIT); |
170 | if (ret >= 0) | |
171 | res->id = ret; | |
5bb39e81 | 172 | |
cc39a8fa TH |
173 | write_unlock(&dev_priv->resource_lock); |
174 | idr_preload_end(); | |
175 | return ret < 0 ? ret : 0; | |
5bb39e81 TH |
176 | } |
177 | ||
c0951b79 TH |
178 | /** |
179 | * vmw_resource_init - initialize a struct vmw_resource | |
180 | * | |
181 | * @dev_priv: Pointer to a device private struct. | |
182 | * @res: The struct vmw_resource to initialize. | |
183 | * @obj_type: Resource object type. | |
184 | * @delay_id: Boolean whether to defer device id allocation until | |
185 | * the first validation. | |
186 | * @res_free: Resource destructor. | |
187 | * @func: Resource function table. | |
188 | */ | |
543831cf TH |
189 | int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res, |
190 | bool delay_id, | |
191 | void (*res_free) (struct vmw_resource *res), | |
192 | const struct vmw_res_func *func) | |
fb1d9738 | 193 | { |
fb1d9738 JB |
194 | kref_init(&res->kref); |
195 | res->hw_destroy = NULL; | |
196 | res->res_free = res_free; | |
fb1d9738 JB |
197 | res->avail = false; |
198 | res->dev_priv = dev_priv; | |
c0951b79 TH |
199 | res->func = func; |
200 | INIT_LIST_HEAD(&res->lru_head); | |
201 | INIT_LIST_HEAD(&res->mob_head); | |
173fb7d4 | 202 | INIT_LIST_HEAD(&res->binding_head); |
5bb39e81 | 203 | res->id = -1; |
c0951b79 TH |
204 | res->backup = NULL; |
205 | res->backup_offset = 0; | |
206 | res->backup_dirty = false; | |
207 | res->res_dirty = false; | |
5bb39e81 TH |
208 | if (delay_id) |
209 | return 0; | |
210 | else | |
c0951b79 | 211 | return vmw_resource_alloc_id(res); |
fb1d9738 JB |
212 | } |
213 | ||
214 | /** | |
215 | * vmw_resource_activate | |
216 | * | |
217 | * @res: Pointer to the newly created resource | |
218 | * @hw_destroy: Destroy function. NULL if none. | |
219 | * | |
220 | * Activate a resource after the hardware has been made aware of it. | |
221 | * Set tye destroy function to @destroy. Typically this frees the | |
222 | * resource and destroys the hardware resources associated with it. | |
223 | * Activate basically means that the function vmw_resource_lookup will | |
224 | * find it. | |
225 | */ | |
543831cf TH |
226 | void vmw_resource_activate(struct vmw_resource *res, |
227 | void (*hw_destroy) (struct vmw_resource *)) | |
fb1d9738 JB |
228 | { |
229 | struct vmw_private *dev_priv = res->dev_priv; | |
230 | ||
231 | write_lock(&dev_priv->resource_lock); | |
232 | res->avail = true; | |
233 | res->hw_destroy = hw_destroy; | |
234 | write_unlock(&dev_priv->resource_lock); | |
235 | } | |
236 | ||
c0951b79 TH |
237 | /** |
238 | * vmw_user_resource_lookup_handle - lookup a struct resource from a | |
239 | * TTM user-space handle and perform basic type checks | |
240 | * | |
241 | * @dev_priv: Pointer to a device private struct | |
242 | * @tfile: Pointer to a struct ttm_object_file identifying the caller | |
243 | * @handle: The TTM user-space handle | |
244 | * @converter: Pointer to an object describing the resource type | |
245 | * @p_res: On successful return the location pointed to will contain | |
246 | * a pointer to a refcounted struct vmw_resource. | |
247 | * | |
248 | * If the handle can't be found or is associated with an incorrect resource | |
249 | * type, -EINVAL will be returned. | |
250 | */ | |
251 | int vmw_user_resource_lookup_handle(struct vmw_private *dev_priv, | |
252 | struct ttm_object_file *tfile, | |
253 | uint32_t handle, | |
254 | const struct vmw_user_resource_conv | |
255 | *converter, | |
256 | struct vmw_resource **p_res) | |
fb1d9738 | 257 | { |
7a73ba74 | 258 | struct ttm_base_object *base; |
c0951b79 TH |
259 | struct vmw_resource *res; |
260 | int ret = -EINVAL; | |
fb1d9738 | 261 | |
7a73ba74 TH |
262 | base = ttm_base_object_lookup(tfile, handle); |
263 | if (unlikely(base == NULL)) | |
264 | return -EINVAL; | |
265 | ||
79e5f810 | 266 | if (unlikely(ttm_base_object_type(base) != converter->object_type)) |
c0951b79 | 267 | goto out_bad_resource; |
7a73ba74 | 268 | |
c0951b79 | 269 | res = converter->base_obj_to_res(base); |
7a73ba74 | 270 | |
c0951b79 TH |
271 | read_lock(&dev_priv->resource_lock); |
272 | if (!res->avail || res->res_free != converter->res_free) { | |
273 | read_unlock(&dev_priv->resource_lock); | |
274 | goto out_bad_resource; | |
275 | } | |
fb1d9738 | 276 | |
c0951b79 TH |
277 | kref_get(&res->kref); |
278 | read_unlock(&dev_priv->resource_lock); | |
279 | ||
280 | *p_res = res; | |
281 | ret = 0; | |
282 | ||
283 | out_bad_resource: | |
7a73ba74 | 284 | ttm_base_object_unref(&base); |
c0951b79 TH |
285 | |
286 | return ret; | |
287 | } | |
288 | ||
289 | /** | |
290 | * Helper function that looks either a surface or dmabuf. | |
291 | * | |
292 | * The pointer this pointed at by out_surf and out_buf needs to be null. | |
293 | */ | |
294 | int vmw_user_lookup_handle(struct vmw_private *dev_priv, | |
295 | struct ttm_object_file *tfile, | |
296 | uint32_t handle, | |
297 | struct vmw_surface **out_surf, | |
298 | struct vmw_dma_buffer **out_buf) | |
299 | { | |
300 | struct vmw_resource *res; | |
301 | int ret; | |
302 | ||
303 | BUG_ON(*out_surf || *out_buf); | |
304 | ||
305 | ret = vmw_user_resource_lookup_handle(dev_priv, tfile, handle, | |
306 | user_surface_converter, | |
307 | &res); | |
308 | if (!ret) { | |
309 | *out_surf = vmw_res_to_srf(res); | |
310 | return 0; | |
311 | } | |
312 | ||
313 | *out_surf = NULL; | |
54c12bc3 | 314 | ret = vmw_user_dmabuf_lookup(tfile, handle, out_buf, NULL); |
fb1d9738 JB |
315 | return ret; |
316 | } | |
317 | ||
318 | /** | |
319 | * Buffer management. | |
320 | */ | |
308d17ef TH |
321 | |
322 | /** | |
323 | * vmw_dmabuf_acc_size - Calculate the pinned memory usage of buffers | |
324 | * | |
325 | * @dev_priv: Pointer to a struct vmw_private identifying the device. | |
326 | * @size: The requested buffer size. | |
327 | * @user: Whether this is an ordinary dma buffer or a user dma buffer. | |
328 | */ | |
329 | static size_t vmw_dmabuf_acc_size(struct vmw_private *dev_priv, size_t size, | |
330 | bool user) | |
331 | { | |
332 | static size_t struct_size, user_struct_size; | |
333 | size_t num_pages = PAGE_ALIGN(size) >> PAGE_SHIFT; | |
334 | size_t page_array_size = ttm_round_pot(num_pages * sizeof(void *)); | |
335 | ||
336 | if (unlikely(struct_size == 0)) { | |
337 | size_t backend_size = ttm_round_pot(vmw_tt_size); | |
338 | ||
339 | struct_size = backend_size + | |
340 | ttm_round_pot(sizeof(struct vmw_dma_buffer)); | |
341 | user_struct_size = backend_size + | |
342 | ttm_round_pot(sizeof(struct vmw_user_dma_buffer)); | |
343 | } | |
344 | ||
345 | if (dev_priv->map_mode == vmw_dma_alloc_coherent) | |
346 | page_array_size += | |
347 | ttm_round_pot(num_pages * sizeof(dma_addr_t)); | |
348 | ||
349 | return ((user) ? user_struct_size : struct_size) + | |
350 | page_array_size; | |
351 | } | |
352 | ||
effe1105 TH |
353 | void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo) |
354 | { | |
355 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); | |
effe1105 | 356 | |
fb1d9738 JB |
357 | kfree(vmw_bo); |
358 | } | |
359 | ||
308d17ef TH |
360 | static void vmw_user_dmabuf_destroy(struct ttm_buffer_object *bo) |
361 | { | |
362 | struct vmw_user_dma_buffer *vmw_user_bo = vmw_user_dma_buffer(bo); | |
363 | ||
364 | ttm_prime_object_kfree(vmw_user_bo, prime); | |
365 | } | |
366 | ||
fb1d9738 JB |
367 | int vmw_dmabuf_init(struct vmw_private *dev_priv, |
368 | struct vmw_dma_buffer *vmw_bo, | |
369 | size_t size, struct ttm_placement *placement, | |
370 | bool interruptible, | |
371 | void (*bo_free) (struct ttm_buffer_object *bo)) | |
372 | { | |
373 | struct ttm_bo_device *bdev = &dev_priv->bdev; | |
fb1d9738 JB |
374 | size_t acc_size; |
375 | int ret; | |
308d17ef | 376 | bool user = (bo_free == &vmw_user_dmabuf_destroy); |
fb1d9738 | 377 | |
308d17ef | 378 | BUG_ON(!bo_free && (!user && (bo_free != vmw_dmabuf_bo_free))); |
fb1d9738 | 379 | |
308d17ef | 380 | acc_size = vmw_dmabuf_acc_size(dev_priv, size, user); |
fb1d9738 JB |
381 | memset(vmw_bo, 0, sizeof(*vmw_bo)); |
382 | ||
c0951b79 | 383 | INIT_LIST_HEAD(&vmw_bo->res_list); |
fb1d9738 JB |
384 | |
385 | ret = ttm_bo_init(bdev, &vmw_bo->base, size, | |
a34417f6 | 386 | ttm_bo_type_device, placement, |
0b91c4a1 | 387 | 0, interruptible, |
f4f4e3e3 | 388 | NULL, acc_size, NULL, NULL, bo_free); |
fb1d9738 JB |
389 | return ret; |
390 | } | |
391 | ||
fb1d9738 JB |
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 | ||
c486d4f8 TH |
403 | vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, |
404 | prime.base); | |
fb1d9738 JB |
405 | bo = &vmw_user_bo->dma.base; |
406 | ttm_bo_unref(&bo); | |
407 | } | |
408 | ||
1d7a5cbf TH |
409 | static void vmw_user_dmabuf_ref_obj_release(struct ttm_base_object *base, |
410 | enum ttm_ref_type ref_type) | |
411 | { | |
412 | struct vmw_user_dma_buffer *user_bo; | |
413 | user_bo = container_of(base, struct vmw_user_dma_buffer, prime.base); | |
414 | ||
415 | switch (ref_type) { | |
416 | case TTM_REF_SYNCCPU_WRITE: | |
417 | ttm_bo_synccpu_write_release(&user_bo->dma.base); | |
418 | break; | |
419 | default: | |
420 | BUG(); | |
421 | } | |
422 | } | |
423 | ||
c0951b79 TH |
424 | /** |
425 | * vmw_user_dmabuf_alloc - Allocate a user dma buffer | |
426 | * | |
427 | * @dev_priv: Pointer to a struct device private. | |
428 | * @tfile: Pointer to a struct ttm_object_file on which to register the user | |
429 | * object. | |
430 | * @size: Size of the dma buffer. | |
431 | * @shareable: Boolean whether the buffer is shareable with other open files. | |
432 | * @handle: Pointer to where the handle value should be assigned. | |
433 | * @p_dma_buf: Pointer to where the refcounted struct vmw_dma_buffer pointer | |
434 | * should be assigned. | |
435 | */ | |
436 | int vmw_user_dmabuf_alloc(struct vmw_private *dev_priv, | |
437 | struct ttm_object_file *tfile, | |
438 | uint32_t size, | |
439 | bool shareable, | |
440 | uint32_t *handle, | |
54c12bc3 TH |
441 | struct vmw_dma_buffer **p_dma_buf, |
442 | struct ttm_base_object **p_base) | |
c0951b79 TH |
443 | { |
444 | struct vmw_user_dma_buffer *user_bo; | |
445 | struct ttm_buffer_object *tmp; | |
446 | int ret; | |
447 | ||
448 | user_bo = kzalloc(sizeof(*user_bo), GFP_KERNEL); | |
1a4adb05 | 449 | if (unlikely(!user_bo)) { |
c0951b79 TH |
450 | DRM_ERROR("Failed to allocate a buffer.\n"); |
451 | return -ENOMEM; | |
452 | } | |
453 | ||
454 | ret = vmw_dmabuf_init(dev_priv, &user_bo->dma, size, | |
96c5f0df | 455 | (dev_priv->has_mob) ? |
6bf6bf03 | 456 | &vmw_sys_placement : |
c0951b79 TH |
457 | &vmw_vram_sys_placement, true, |
458 | &vmw_user_dmabuf_destroy); | |
459 | if (unlikely(ret != 0)) | |
460 | return ret; | |
461 | ||
462 | tmp = ttm_bo_reference(&user_bo->dma.base); | |
c486d4f8 TH |
463 | ret = ttm_prime_object_init(tfile, |
464 | size, | |
465 | &user_bo->prime, | |
466 | shareable, | |
467 | ttm_buffer_type, | |
1d7a5cbf TH |
468 | &vmw_user_dmabuf_release, |
469 | &vmw_user_dmabuf_ref_obj_release); | |
c0951b79 TH |
470 | if (unlikely(ret != 0)) { |
471 | ttm_bo_unref(&tmp); | |
472 | goto out_no_base_object; | |
473 | } | |
474 | ||
475 | *p_dma_buf = &user_bo->dma; | |
54c12bc3 TH |
476 | if (p_base) { |
477 | *p_base = &user_bo->prime.base; | |
478 | kref_get(&(*p_base)->refcount); | |
479 | } | |
c486d4f8 | 480 | *handle = user_bo->prime.base.hash.key; |
c0951b79 TH |
481 | |
482 | out_no_base_object: | |
483 | return ret; | |
484 | } | |
485 | ||
d08a9b9c TH |
486 | /** |
487 | * vmw_user_dmabuf_verify_access - verify access permissions on this | |
488 | * buffer object. | |
489 | * | |
490 | * @bo: Pointer to the buffer object being accessed | |
491 | * @tfile: Identifying the caller. | |
492 | */ | |
493 | int vmw_user_dmabuf_verify_access(struct ttm_buffer_object *bo, | |
494 | struct ttm_object_file *tfile) | |
495 | { | |
496 | struct vmw_user_dma_buffer *vmw_user_bo; | |
497 | ||
498 | if (unlikely(bo->destroy != vmw_user_dmabuf_destroy)) | |
499 | return -EPERM; | |
500 | ||
501 | vmw_user_bo = vmw_user_dma_buffer(bo); | |
f6dfe73a TH |
502 | |
503 | /* Check that the caller has opened the object. */ | |
504 | if (likely(ttm_ref_object_exists(tfile, &vmw_user_bo->prime.base))) | |
505 | return 0; | |
506 | ||
507 | DRM_ERROR("Could not grant buffer access.\n"); | |
508 | return -EPERM; | |
d08a9b9c TH |
509 | } |
510 | ||
1d7a5cbf TH |
511 | /** |
512 | * vmw_user_dmabuf_synccpu_grab - Grab a struct vmw_user_dma_buffer for cpu | |
513 | * access, idling previous GPU operations on the buffer and optionally | |
514 | * blocking it for further command submissions. | |
515 | * | |
516 | * @user_bo: Pointer to the buffer object being grabbed for CPU access | |
517 | * @tfile: Identifying the caller. | |
518 | * @flags: Flags indicating how the grab should be performed. | |
519 | * | |
520 | * A blocking grab will be automatically released when @tfile is closed. | |
521 | */ | |
522 | static int vmw_user_dmabuf_synccpu_grab(struct vmw_user_dma_buffer *user_bo, | |
523 | struct ttm_object_file *tfile, | |
524 | uint32_t flags) | |
525 | { | |
526 | struct ttm_buffer_object *bo = &user_bo->dma.base; | |
527 | bool existed; | |
528 | int ret; | |
529 | ||
530 | if (flags & drm_vmw_synccpu_allow_cs) { | |
dd7cfd64 | 531 | bool nonblock = !!(flags & drm_vmw_synccpu_dontblock); |
5fbad992 | 532 | long lret; |
1d7a5cbf | 533 | |
998a7aa1 CW |
534 | lret = reservation_object_wait_timeout_rcu(bo->resv, true, true, |
535 | nonblock ? 0 : MAX_SCHEDULE_TIMEOUT); | |
5fbad992 ML |
536 | if (!lret) |
537 | return -EBUSY; | |
538 | else if (lret < 0) | |
539 | return lret; | |
540 | return 0; | |
1d7a5cbf TH |
541 | } |
542 | ||
543 | ret = ttm_bo_synccpu_write_grab | |
544 | (bo, !!(flags & drm_vmw_synccpu_dontblock)); | |
545 | if (unlikely(ret != 0)) | |
546 | return ret; | |
547 | ||
548 | ret = ttm_ref_object_add(tfile, &user_bo->prime.base, | |
fe25deb7 | 549 | TTM_REF_SYNCCPU_WRITE, &existed, false); |
1d7a5cbf TH |
550 | if (ret != 0 || existed) |
551 | ttm_bo_synccpu_write_release(&user_bo->dma.base); | |
552 | ||
553 | return ret; | |
554 | } | |
555 | ||
556 | /** | |
557 | * vmw_user_dmabuf_synccpu_release - Release a previous grab for CPU access, | |
558 | * and unblock command submission on the buffer if blocked. | |
559 | * | |
560 | * @handle: Handle identifying the buffer object. | |
561 | * @tfile: Identifying the caller. | |
562 | * @flags: Flags indicating the type of release. | |
563 | */ | |
564 | static int vmw_user_dmabuf_synccpu_release(uint32_t handle, | |
565 | struct ttm_object_file *tfile, | |
566 | uint32_t flags) | |
567 | { | |
568 | if (!(flags & drm_vmw_synccpu_allow_cs)) | |
569 | return ttm_ref_object_base_unref(tfile, handle, | |
570 | TTM_REF_SYNCCPU_WRITE); | |
571 | ||
572 | return 0; | |
573 | } | |
574 | ||
575 | /** | |
576 | * vmw_user_dmabuf_synccpu_release - ioctl function implementing the synccpu | |
577 | * functionality. | |
578 | * | |
579 | * @dev: Identifies the drm device. | |
580 | * @data: Pointer to the ioctl argument. | |
581 | * @file_priv: Identifies the caller. | |
582 | * | |
583 | * This function checks the ioctl arguments for validity and calls the | |
584 | * relevant synccpu functions. | |
585 | */ | |
586 | int vmw_user_dmabuf_synccpu_ioctl(struct drm_device *dev, void *data, | |
587 | struct drm_file *file_priv) | |
588 | { | |
589 | struct drm_vmw_synccpu_arg *arg = | |
590 | (struct drm_vmw_synccpu_arg *) data; | |
591 | struct vmw_dma_buffer *dma_buf; | |
592 | struct vmw_user_dma_buffer *user_bo; | |
593 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
54c12bc3 | 594 | struct ttm_base_object *buffer_base; |
1d7a5cbf TH |
595 | int ret; |
596 | ||
597 | if ((arg->flags & (drm_vmw_synccpu_read | drm_vmw_synccpu_write)) == 0 | |
598 | || (arg->flags & ~(drm_vmw_synccpu_read | drm_vmw_synccpu_write | | |
599 | drm_vmw_synccpu_dontblock | | |
600 | drm_vmw_synccpu_allow_cs)) != 0) { | |
601 | DRM_ERROR("Illegal synccpu flags.\n"); | |
602 | return -EINVAL; | |
603 | } | |
604 | ||
605 | switch (arg->op) { | |
606 | case drm_vmw_synccpu_grab: | |
54c12bc3 TH |
607 | ret = vmw_user_dmabuf_lookup(tfile, arg->handle, &dma_buf, |
608 | &buffer_base); | |
1d7a5cbf TH |
609 | if (unlikely(ret != 0)) |
610 | return ret; | |
611 | ||
612 | user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, | |
613 | dma); | |
614 | ret = vmw_user_dmabuf_synccpu_grab(user_bo, tfile, arg->flags); | |
615 | vmw_dmabuf_unreference(&dma_buf); | |
54c12bc3 | 616 | ttm_base_object_unref(&buffer_base); |
1d7a5cbf TH |
617 | if (unlikely(ret != 0 && ret != -ERESTARTSYS && |
618 | ret != -EBUSY)) { | |
619 | DRM_ERROR("Failed synccpu grab on handle 0x%08x.\n", | |
620 | (unsigned int) arg->handle); | |
621 | return ret; | |
622 | } | |
623 | break; | |
624 | case drm_vmw_synccpu_release: | |
625 | ret = vmw_user_dmabuf_synccpu_release(arg->handle, tfile, | |
626 | arg->flags); | |
627 | if (unlikely(ret != 0)) { | |
628 | DRM_ERROR("Failed synccpu release on handle 0x%08x.\n", | |
629 | (unsigned int) arg->handle); | |
630 | return ret; | |
631 | } | |
632 | break; | |
633 | default: | |
634 | DRM_ERROR("Invalid synccpu operation.\n"); | |
635 | return -EINVAL; | |
636 | } | |
637 | ||
638 | return 0; | |
639 | } | |
640 | ||
fb1d9738 JB |
641 | int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data, |
642 | struct drm_file *file_priv) | |
643 | { | |
644 | struct vmw_private *dev_priv = vmw_priv(dev); | |
645 | union drm_vmw_alloc_dmabuf_arg *arg = | |
646 | (union drm_vmw_alloc_dmabuf_arg *)data; | |
647 | struct drm_vmw_alloc_dmabuf_req *req = &arg->req; | |
648 | struct drm_vmw_dmabuf_rep *rep = &arg->rep; | |
c0951b79 TH |
649 | struct vmw_dma_buffer *dma_buf; |
650 | uint32_t handle; | |
fb1d9738 JB |
651 | int ret; |
652 | ||
294adf7d | 653 | ret = ttm_read_lock(&dev_priv->reservation_sem, true); |
c0951b79 | 654 | if (unlikely(ret != 0)) |
fb1d9738 | 655 | return ret; |
fb1d9738 | 656 | |
c0951b79 | 657 | ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile, |
54c12bc3 TH |
658 | req->size, false, &handle, &dma_buf, |
659 | NULL); | |
fb1d9738 | 660 | if (unlikely(ret != 0)) |
2f5993cc | 661 | goto out_no_dmabuf; |
fb1d9738 | 662 | |
c0951b79 | 663 | rep->handle = handle; |
72525b3f | 664 | rep->map_handle = drm_vma_node_offset_addr(&dma_buf->base.vma_node); |
c0951b79 TH |
665 | rep->cur_gmr_id = handle; |
666 | rep->cur_gmr_offset = 0; | |
667 | ||
668 | vmw_dmabuf_unreference(&dma_buf); | |
fb1d9738 | 669 | |
2f5993cc | 670 | out_no_dmabuf: |
294adf7d | 671 | ttm_read_unlock(&dev_priv->reservation_sem); |
fb1d9738 | 672 | |
2f5993cc | 673 | return ret; |
fb1d9738 JB |
674 | } |
675 | ||
676 | int vmw_dmabuf_unref_ioctl(struct drm_device *dev, void *data, | |
677 | struct drm_file *file_priv) | |
678 | { | |
679 | struct drm_vmw_unref_dmabuf_arg *arg = | |
680 | (struct drm_vmw_unref_dmabuf_arg *)data; | |
681 | ||
682 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, | |
683 | arg->handle, | |
684 | TTM_REF_USAGE); | |
685 | } | |
686 | ||
fb1d9738 | 687 | int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile, |
54c12bc3 TH |
688 | uint32_t handle, struct vmw_dma_buffer **out, |
689 | struct ttm_base_object **p_base) | |
fb1d9738 JB |
690 | { |
691 | struct vmw_user_dma_buffer *vmw_user_bo; | |
692 | struct ttm_base_object *base; | |
693 | ||
694 | base = ttm_base_object_lookup(tfile, handle); | |
695 | if (unlikely(base == NULL)) { | |
8dfe162a | 696 | pr_err("Invalid buffer object handle 0x%08lx\n", |
fb1d9738 JB |
697 | (unsigned long)handle); |
698 | return -ESRCH; | |
699 | } | |
700 | ||
c486d4f8 | 701 | if (unlikely(ttm_base_object_type(base) != ttm_buffer_type)) { |
fb1d9738 | 702 | ttm_base_object_unref(&base); |
8dfe162a | 703 | pr_err("Invalid buffer object handle 0x%08lx\n", |
fb1d9738 JB |
704 | (unsigned long)handle); |
705 | return -EINVAL; | |
706 | } | |
707 | ||
c486d4f8 TH |
708 | vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, |
709 | prime.base); | |
fb1d9738 | 710 | (void)ttm_bo_reference(&vmw_user_bo->dma.base); |
54c12bc3 TH |
711 | if (p_base) |
712 | *p_base = base; | |
713 | else | |
714 | ttm_base_object_unref(&base); | |
fb1d9738 JB |
715 | *out = &vmw_user_bo->dma; |
716 | ||
717 | return 0; | |
718 | } | |
719 | ||
c0951b79 | 720 | int vmw_user_dmabuf_reference(struct ttm_object_file *tfile, |
a97e2192 TH |
721 | struct vmw_dma_buffer *dma_buf, |
722 | uint32_t *handle) | |
c0951b79 TH |
723 | { |
724 | struct vmw_user_dma_buffer *user_bo; | |
725 | ||
726 | if (dma_buf->base.destroy != vmw_user_dmabuf_destroy) | |
727 | return -EINVAL; | |
728 | ||
729 | user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, dma); | |
a97e2192 TH |
730 | |
731 | *handle = user_bo->prime.base.hash.key; | |
c486d4f8 | 732 | return ttm_ref_object_add(tfile, &user_bo->prime.base, |
fe25deb7 | 733 | TTM_REF_USAGE, NULL, false); |
c0951b79 TH |
734 | } |
735 | ||
d69d51d7 TH |
736 | /** |
737 | * vmw_dumb_create - Create a dumb kms buffer | |
738 | * | |
739 | * @file_priv: Pointer to a struct drm_file identifying the caller. | |
740 | * @dev: Pointer to the drm device. | |
741 | * @args: Pointer to a struct drm_mode_create_dumb structure | |
742 | * | |
743 | * This is a driver callback for the core drm create_dumb functionality. | |
744 | * Note that this is very similar to the vmw_dmabuf_alloc ioctl, except | |
745 | * that the arguments have a different format. | |
746 | */ | |
5e1782d2 DA |
747 | int vmw_dumb_create(struct drm_file *file_priv, |
748 | struct drm_device *dev, | |
749 | struct drm_mode_create_dumb *args) | |
750 | { | |
751 | struct vmw_private *dev_priv = vmw_priv(dev); | |
d69d51d7 | 752 | struct vmw_dma_buffer *dma_buf; |
5e1782d2 DA |
753 | int ret; |
754 | ||
755 | args->pitch = args->width * ((args->bpp + 7) / 8); | |
756 | args->size = args->pitch * args->height; | |
757 | ||
294adf7d | 758 | ret = ttm_read_lock(&dev_priv->reservation_sem, true); |
d69d51d7 | 759 | if (unlikely(ret != 0)) |
5e1782d2 | 760 | return ret; |
5e1782d2 | 761 | |
d69d51d7 TH |
762 | ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile, |
763 | args->size, false, &args->handle, | |
54c12bc3 | 764 | &dma_buf, NULL); |
5e1782d2 | 765 | if (unlikely(ret != 0)) |
d69d51d7 | 766 | goto out_no_dmabuf; |
5e1782d2 | 767 | |
d69d51d7 | 768 | vmw_dmabuf_unreference(&dma_buf); |
5e1782d2 | 769 | out_no_dmabuf: |
294adf7d | 770 | ttm_read_unlock(&dev_priv->reservation_sem); |
5e1782d2 DA |
771 | return ret; |
772 | } | |
773 | ||
d69d51d7 TH |
774 | /** |
775 | * vmw_dumb_map_offset - Return the address space offset of a dumb buffer | |
776 | * | |
777 | * @file_priv: Pointer to a struct drm_file identifying the caller. | |
778 | * @dev: Pointer to the drm device. | |
779 | * @handle: Handle identifying the dumb buffer. | |
780 | * @offset: The address space offset returned. | |
781 | * | |
782 | * This is a driver callback for the core drm dumb_map_offset functionality. | |
783 | */ | |
5e1782d2 DA |
784 | int vmw_dumb_map_offset(struct drm_file *file_priv, |
785 | struct drm_device *dev, uint32_t handle, | |
786 | uint64_t *offset) | |
787 | { | |
788 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
789 | struct vmw_dma_buffer *out_buf; | |
790 | int ret; | |
791 | ||
54c12bc3 | 792 | ret = vmw_user_dmabuf_lookup(tfile, handle, &out_buf, NULL); |
5e1782d2 DA |
793 | if (ret != 0) |
794 | return -EINVAL; | |
795 | ||
72525b3f | 796 | *offset = drm_vma_node_offset_addr(&out_buf->base.vma_node); |
5e1782d2 DA |
797 | vmw_dmabuf_unreference(&out_buf); |
798 | return 0; | |
799 | } | |
800 | ||
d69d51d7 TH |
801 | /** |
802 | * vmw_dumb_destroy - Destroy a dumb boffer | |
803 | * | |
804 | * @file_priv: Pointer to a struct drm_file identifying the caller. | |
805 | * @dev: Pointer to the drm device. | |
806 | * @handle: Handle identifying the dumb buffer. | |
807 | * | |
808 | * This is a driver callback for the core drm dumb_destroy functionality. | |
809 | */ | |
5e1782d2 DA |
810 | int vmw_dumb_destroy(struct drm_file *file_priv, |
811 | struct drm_device *dev, | |
812 | uint32_t handle) | |
813 | { | |
814 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, | |
815 | handle, TTM_REF_USAGE); | |
816 | } | |
c0951b79 TH |
817 | |
818 | /** | |
819 | * vmw_resource_buf_alloc - Allocate a backup buffer for a resource. | |
820 | * | |
821 | * @res: The resource for which to allocate a backup buffer. | |
822 | * @interruptible: Whether any sleeps during allocation should be | |
823 | * performed while interruptible. | |
824 | */ | |
825 | static int vmw_resource_buf_alloc(struct vmw_resource *res, | |
826 | bool interruptible) | |
827 | { | |
828 | unsigned long size = | |
829 | (res->backup_size + PAGE_SIZE - 1) & PAGE_MASK; | |
830 | struct vmw_dma_buffer *backup; | |
831 | int ret; | |
832 | ||
833 | if (likely(res->backup)) { | |
834 | BUG_ON(res->backup->base.num_pages * PAGE_SIZE < size); | |
835 | return 0; | |
836 | } | |
837 | ||
838 | backup = kzalloc(sizeof(*backup), GFP_KERNEL); | |
1a4adb05 | 839 | if (unlikely(!backup)) |
c0951b79 TH |
840 | return -ENOMEM; |
841 | ||
842 | ret = vmw_dmabuf_init(res->dev_priv, backup, res->backup_size, | |
843 | res->func->backup_placement, | |
844 | interruptible, | |
845 | &vmw_dmabuf_bo_free); | |
846 | if (unlikely(ret != 0)) | |
847 | goto out_no_dmabuf; | |
848 | ||
849 | res->backup = backup; | |
850 | ||
851 | out_no_dmabuf: | |
852 | return ret; | |
853 | } | |
854 | ||
855 | /** | |
856 | * vmw_resource_do_validate - Make a resource up-to-date and visible | |
857 | * to the device. | |
858 | * | |
859 | * @res: The resource to make visible to the device. | |
860 | * @val_buf: Information about a buffer possibly | |
861 | * containing backup data if a bind operation is needed. | |
862 | * | |
863 | * On hardware resource shortage, this function returns -EBUSY and | |
864 | * should be retried once resources have been freed up. | |
865 | */ | |
866 | static int vmw_resource_do_validate(struct vmw_resource *res, | |
867 | struct ttm_validate_buffer *val_buf) | |
868 | { | |
869 | int ret = 0; | |
870 | const struct vmw_res_func *func = res->func; | |
871 | ||
872 | if (unlikely(res->id == -1)) { | |
873 | ret = func->create(res); | |
874 | if (unlikely(ret != 0)) | |
875 | return ret; | |
876 | } | |
877 | ||
878 | if (func->bind && | |
879 | ((func->needs_backup && list_empty(&res->mob_head) && | |
880 | val_buf->bo != NULL) || | |
881 | (!func->needs_backup && val_buf->bo != NULL))) { | |
882 | ret = func->bind(res, val_buf); | |
883 | if (unlikely(ret != 0)) | |
884 | goto out_bind_failed; | |
885 | if (func->needs_backup) | |
886 | list_add_tail(&res->mob_head, &res->backup->res_list); | |
887 | } | |
888 | ||
889 | /* | |
890 | * Only do this on write operations, and move to | |
891 | * vmw_resource_unreserve if it can be called after | |
892 | * backup buffers have been unreserved. Otherwise | |
893 | * sort out locking. | |
894 | */ | |
895 | res->res_dirty = true; | |
896 | ||
897 | return 0; | |
898 | ||
899 | out_bind_failed: | |
900 | func->destroy(res); | |
901 | ||
902 | return ret; | |
903 | } | |
904 | ||
905 | /** | |
906 | * vmw_resource_unreserve - Unreserve a resource previously reserved for | |
907 | * command submission. | |
908 | * | |
909 | * @res: Pointer to the struct vmw_resource to unreserve. | |
d80efd5c | 910 | * @switch_backup: Backup buffer has been switched. |
c0951b79 | 911 | * @new_backup: Pointer to new backup buffer if command submission |
d80efd5c TH |
912 | * switched. May be NULL. |
913 | * @new_backup_offset: New backup offset if @switch_backup is true. | |
c0951b79 TH |
914 | * |
915 | * Currently unreserving a resource means putting it back on the device's | |
916 | * resource lru list, so that it can be evicted if necessary. | |
917 | */ | |
918 | void vmw_resource_unreserve(struct vmw_resource *res, | |
d80efd5c | 919 | bool switch_backup, |
c0951b79 TH |
920 | struct vmw_dma_buffer *new_backup, |
921 | unsigned long new_backup_offset) | |
922 | { | |
923 | struct vmw_private *dev_priv = res->dev_priv; | |
924 | ||
925 | if (!list_empty(&res->lru_head)) | |
926 | return; | |
927 | ||
d80efd5c | 928 | if (switch_backup && new_backup != res->backup) { |
c0951b79 | 929 | if (res->backup) { |
8bd4ce56 | 930 | lockdep_assert_held(&res->backup->base.resv->lock.base); |
c0951b79 TH |
931 | list_del_init(&res->mob_head); |
932 | vmw_dmabuf_unreference(&res->backup); | |
933 | } | |
934 | ||
d80efd5c TH |
935 | if (new_backup) { |
936 | res->backup = vmw_dmabuf_reference(new_backup); | |
937 | lockdep_assert_held(&new_backup->base.resv->lock.base); | |
938 | list_add_tail(&res->mob_head, &new_backup->res_list); | |
939 | } else { | |
940 | res->backup = NULL; | |
941 | } | |
c0951b79 | 942 | } |
d80efd5c | 943 | if (switch_backup) |
c0951b79 TH |
944 | res->backup_offset = new_backup_offset; |
945 | ||
ed93394c | 946 | if (!res->func->may_evict || res->id == -1 || res->pin_count) |
c0951b79 TH |
947 | return; |
948 | ||
949 | write_lock(&dev_priv->resource_lock); | |
950 | list_add_tail(&res->lru_head, | |
951 | &res->dev_priv->res_lru[res->func->res_type]); | |
952 | write_unlock(&dev_priv->resource_lock); | |
953 | } | |
954 | ||
955 | /** | |
956 | * vmw_resource_check_buffer - Check whether a backup buffer is needed | |
957 | * for a resource and in that case, allocate | |
958 | * one, reserve and validate it. | |
959 | * | |
960 | * @res: The resource for which to allocate a backup buffer. | |
961 | * @interruptible: Whether any sleeps during allocation should be | |
962 | * performed while interruptible. | |
963 | * @val_buf: On successful return contains data about the | |
964 | * reserved and validated backup buffer. | |
965 | */ | |
ecff665f ML |
966 | static int |
967 | vmw_resource_check_buffer(struct vmw_resource *res, | |
ecff665f ML |
968 | bool interruptible, |
969 | struct ttm_validate_buffer *val_buf) | |
c0951b79 TH |
970 | { |
971 | struct list_head val_list; | |
972 | bool backup_dirty = false; | |
973 | int ret; | |
974 | ||
975 | if (unlikely(res->backup == NULL)) { | |
976 | ret = vmw_resource_buf_alloc(res, interruptible); | |
977 | if (unlikely(ret != 0)) | |
978 | return ret; | |
979 | } | |
980 | ||
981 | INIT_LIST_HEAD(&val_list); | |
982 | val_buf->bo = ttm_bo_reference(&res->backup->base); | |
ae9c0af2 | 983 | val_buf->shared = false; |
c0951b79 | 984 | list_add_tail(&val_buf->head, &val_list); |
aa35071c | 985 | ret = ttm_eu_reserve_buffers(NULL, &val_list, interruptible, NULL); |
c0951b79 TH |
986 | if (unlikely(ret != 0)) |
987 | goto out_no_reserve; | |
988 | ||
989 | if (res->func->needs_backup && list_empty(&res->mob_head)) | |
990 | return 0; | |
991 | ||
992 | backup_dirty = res->backup_dirty; | |
993 | ret = ttm_bo_validate(&res->backup->base, | |
994 | res->func->backup_placement, | |
97a875cb | 995 | true, false); |
c0951b79 TH |
996 | |
997 | if (unlikely(ret != 0)) | |
998 | goto out_no_validate; | |
999 | ||
1000 | return 0; | |
1001 | ||
1002 | out_no_validate: | |
ac49251b | 1003 | ttm_eu_backoff_reservation(NULL, &val_list); |
c0951b79 TH |
1004 | out_no_reserve: |
1005 | ttm_bo_unref(&val_buf->bo); | |
1006 | if (backup_dirty) | |
1007 | vmw_dmabuf_unreference(&res->backup); | |
1008 | ||
1009 | return ret; | |
1010 | } | |
1011 | ||
1012 | /** | |
1013 | * vmw_resource_reserve - Reserve a resource for command submission | |
1014 | * | |
1015 | * @res: The resource to reserve. | |
1016 | * | |
1017 | * This function takes the resource off the LRU list and make sure | |
1018 | * a backup buffer is present for guest-backed resources. However, | |
1019 | * the buffer may not be bound to the resource at this point. | |
1020 | * | |
1021 | */ | |
1a4b172a TH |
1022 | int vmw_resource_reserve(struct vmw_resource *res, bool interruptible, |
1023 | bool no_backup) | |
c0951b79 TH |
1024 | { |
1025 | struct vmw_private *dev_priv = res->dev_priv; | |
1026 | int ret; | |
1027 | ||
1028 | write_lock(&dev_priv->resource_lock); | |
1029 | list_del_init(&res->lru_head); | |
1030 | write_unlock(&dev_priv->resource_lock); | |
1031 | ||
1032 | if (res->func->needs_backup && res->backup == NULL && | |
1033 | !no_backup) { | |
1a4b172a | 1034 | ret = vmw_resource_buf_alloc(res, interruptible); |
d80efd5c TH |
1035 | if (unlikely(ret != 0)) { |
1036 | DRM_ERROR("Failed to allocate a backup buffer " | |
1037 | "of size %lu. bytes\n", | |
1038 | (unsigned long) res->backup_size); | |
c0951b79 | 1039 | return ret; |
d80efd5c | 1040 | } |
c0951b79 TH |
1041 | } |
1042 | ||
1043 | return 0; | |
1044 | } | |
1045 | ||
1046 | /** | |
1047 | * vmw_resource_backoff_reservation - Unreserve and unreference a | |
1048 | * backup buffer | |
1049 | *. | |
1050 | * @val_buf: Backup buffer information. | |
1051 | */ | |
ecff665f | 1052 | static void |
ac49251b | 1053 | vmw_resource_backoff_reservation(struct ttm_validate_buffer *val_buf) |
c0951b79 TH |
1054 | { |
1055 | struct list_head val_list; | |
1056 | ||
1057 | if (likely(val_buf->bo == NULL)) | |
1058 | return; | |
1059 | ||
1060 | INIT_LIST_HEAD(&val_list); | |
1061 | list_add_tail(&val_buf->head, &val_list); | |
ac49251b | 1062 | ttm_eu_backoff_reservation(NULL, &val_list); |
c0951b79 TH |
1063 | ttm_bo_unref(&val_buf->bo); |
1064 | } | |
1065 | ||
1066 | /** | |
1067 | * vmw_resource_do_evict - Evict a resource, and transfer its data | |
1068 | * to a backup buffer. | |
1069 | * | |
1070 | * @res: The resource to evict. | |
ea029c28 | 1071 | * @interruptible: Whether to wait interruptible. |
c0951b79 | 1072 | */ |
b9eb1a61 | 1073 | static int vmw_resource_do_evict(struct vmw_resource *res, bool interruptible) |
c0951b79 TH |
1074 | { |
1075 | struct ttm_validate_buffer val_buf; | |
1076 | const struct vmw_res_func *func = res->func; | |
1077 | int ret; | |
1078 | ||
1079 | BUG_ON(!func->may_evict); | |
1080 | ||
1081 | val_buf.bo = NULL; | |
ae9c0af2 | 1082 | val_buf.shared = false; |
ac49251b | 1083 | ret = vmw_resource_check_buffer(res, interruptible, &val_buf); |
c0951b79 TH |
1084 | if (unlikely(ret != 0)) |
1085 | return ret; | |
1086 | ||
1087 | if (unlikely(func->unbind != NULL && | |
1088 | (!func->needs_backup || !list_empty(&res->mob_head)))) { | |
1089 | ret = func->unbind(res, res->res_dirty, &val_buf); | |
1090 | if (unlikely(ret != 0)) | |
1091 | goto out_no_unbind; | |
1092 | list_del_init(&res->mob_head); | |
1093 | } | |
1094 | ret = func->destroy(res); | |
1095 | res->backup_dirty = true; | |
1096 | res->res_dirty = false; | |
1097 | out_no_unbind: | |
ac49251b | 1098 | vmw_resource_backoff_reservation(&val_buf); |
c0951b79 TH |
1099 | |
1100 | return ret; | |
1101 | } | |
1102 | ||
1103 | ||
1104 | /** | |
1105 | * vmw_resource_validate - Make a resource up-to-date and visible | |
1106 | * to the device. | |
1107 | * | |
1108 | * @res: The resource to make visible to the device. | |
1109 | * | |
1110 | * On succesful return, any backup DMA buffer pointed to by @res->backup will | |
1111 | * be reserved and validated. | |
1112 | * On hardware resource shortage, this function will repeatedly evict | |
1113 | * resources of the same type until the validation succeeds. | |
1114 | */ | |
1115 | int vmw_resource_validate(struct vmw_resource *res) | |
1116 | { | |
1117 | int ret; | |
1118 | struct vmw_resource *evict_res; | |
1119 | struct vmw_private *dev_priv = res->dev_priv; | |
1120 | struct list_head *lru_list = &dev_priv->res_lru[res->func->res_type]; | |
1121 | struct ttm_validate_buffer val_buf; | |
ea029c28 | 1122 | unsigned err_count = 0; |
c0951b79 | 1123 | |
d80efd5c | 1124 | if (!res->func->create) |
c0951b79 TH |
1125 | return 0; |
1126 | ||
1127 | val_buf.bo = NULL; | |
ae9c0af2 | 1128 | val_buf.shared = false; |
c0951b79 TH |
1129 | if (res->backup) |
1130 | val_buf.bo = &res->backup->base; | |
1131 | do { | |
1132 | ret = vmw_resource_do_validate(res, &val_buf); | |
1133 | if (likely(ret != -EBUSY)) | |
1134 | break; | |
1135 | ||
1136 | write_lock(&dev_priv->resource_lock); | |
1137 | if (list_empty(lru_list) || !res->func->may_evict) { | |
ea029c28 | 1138 | DRM_ERROR("Out of device device resources " |
c0951b79 TH |
1139 | "for %s.\n", res->func->type_name); |
1140 | ret = -EBUSY; | |
1141 | write_unlock(&dev_priv->resource_lock); | |
1142 | break; | |
1143 | } | |
1144 | ||
1145 | evict_res = vmw_resource_reference | |
1146 | (list_first_entry(lru_list, struct vmw_resource, | |
1147 | lru_head)); | |
1148 | list_del_init(&evict_res->lru_head); | |
1149 | ||
1150 | write_unlock(&dev_priv->resource_lock); | |
ea029c28 TH |
1151 | |
1152 | ret = vmw_resource_do_evict(evict_res, true); | |
1153 | if (unlikely(ret != 0)) { | |
1154 | write_lock(&dev_priv->resource_lock); | |
1155 | list_add_tail(&evict_res->lru_head, lru_list); | |
1156 | write_unlock(&dev_priv->resource_lock); | |
1157 | if (ret == -ERESTARTSYS || | |
1158 | ++err_count > VMW_RES_EVICT_ERR_COUNT) { | |
1159 | vmw_resource_unreference(&evict_res); | |
1160 | goto out_no_validate; | |
1161 | } | |
1162 | } | |
1163 | ||
c0951b79 TH |
1164 | vmw_resource_unreference(&evict_res); |
1165 | } while (1); | |
1166 | ||
1167 | if (unlikely(ret != 0)) | |
1168 | goto out_no_validate; | |
1169 | else if (!res->func->needs_backup && res->backup) { | |
1170 | list_del_init(&res->mob_head); | |
1171 | vmw_dmabuf_unreference(&res->backup); | |
1172 | } | |
1173 | ||
1174 | return 0; | |
1175 | ||
1176 | out_no_validate: | |
1177 | return ret; | |
1178 | } | |
1179 | ||
1180 | /** | |
1181 | * vmw_fence_single_bo - Utility function to fence a single TTM buffer | |
1182 | * object without unreserving it. | |
1183 | * | |
1184 | * @bo: Pointer to the struct ttm_buffer_object to fence. | |
1185 | * @fence: Pointer to the fence. If NULL, this function will | |
1186 | * insert a fence into the command stream.. | |
1187 | * | |
1188 | * Contrary to the ttm_eu version of this function, it takes only | |
1189 | * a single buffer object instead of a list, and it also doesn't | |
1190 | * unreserve the buffer object, which needs to be done separately. | |
1191 | */ | |
1192 | void vmw_fence_single_bo(struct ttm_buffer_object *bo, | |
1193 | struct vmw_fence_obj *fence) | |
1194 | { | |
1195 | struct ttm_bo_device *bdev = bo->bdev; | |
f2c24b83 | 1196 | |
c0951b79 TH |
1197 | struct vmw_private *dev_priv = |
1198 | container_of(bdev, struct vmw_private, bdev); | |
1199 | ||
2298e804 | 1200 | if (fence == NULL) { |
c0951b79 | 1201 | vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL); |
f2c24b83 | 1202 | reservation_object_add_excl_fence(bo->resv, &fence->base); |
f54d1867 | 1203 | dma_fence_put(&fence->base); |
2298e804 | 1204 | } else |
f2c24b83 | 1205 | reservation_object_add_excl_fence(bo->resv, &fence->base); |
c0951b79 TH |
1206 | } |
1207 | ||
1208 | /** | |
1209 | * vmw_resource_move_notify - TTM move_notify_callback | |
1210 | * | |
fd11a3c0 SY |
1211 | * @bo: The TTM buffer object about to move. |
1212 | * @mem: The struct ttm_mem_reg indicating to what memory | |
1213 | * region the move is taking place. | |
c0951b79 | 1214 | * |
f468911f TH |
1215 | * Evicts the Guest Backed hardware resource if the backup |
1216 | * buffer is being moved out of MOB memory. | |
1217 | * Note that this function should not race with the resource | |
1218 | * validation code as long as it accesses only members of struct | |
1219 | * resource that remain static while bo::res is !NULL and | |
1220 | * while we have @bo reserved. struct resource::backup is *not* a | |
1221 | * static member. The resource validation code will take care | |
1222 | * to set @bo::res to NULL, while having @bo reserved when the | |
1223 | * buffer is no longer bound to the resource, so @bo:res can be | |
1224 | * used to determine whether there is a need to unbind and whether | |
1225 | * it is safe to unbind. | |
c0951b79 TH |
1226 | */ |
1227 | void vmw_resource_move_notify(struct ttm_buffer_object *bo, | |
1228 | struct ttm_mem_reg *mem) | |
1229 | { | |
f468911f TH |
1230 | struct vmw_dma_buffer *dma_buf; |
1231 | ||
1232 | if (mem == NULL) | |
1233 | return; | |
1234 | ||
1235 | if (bo->destroy != vmw_dmabuf_bo_free && | |
1236 | bo->destroy != vmw_user_dmabuf_destroy) | |
1237 | return; | |
1238 | ||
1239 | dma_buf = container_of(bo, struct vmw_dma_buffer, base); | |
1240 | ||
1241 | if (mem->mem_type != VMW_PL_MOB) { | |
1242 | struct vmw_resource *res, *n; | |
f468911f TH |
1243 | struct ttm_validate_buffer val_buf; |
1244 | ||
1245 | val_buf.bo = bo; | |
ae9c0af2 | 1246 | val_buf.shared = false; |
f468911f TH |
1247 | |
1248 | list_for_each_entry_safe(res, n, &dma_buf->res_list, mob_head) { | |
1249 | ||
1250 | if (unlikely(res->func->unbind == NULL)) | |
1251 | continue; | |
1252 | ||
1253 | (void) res->func->unbind(res, true, &val_buf); | |
1254 | res->backup_dirty = true; | |
1255 | res->res_dirty = false; | |
1256 | list_del_init(&res->mob_head); | |
1257 | } | |
1258 | ||
8aa6d4fc | 1259 | (void) ttm_bo_wait(bo, false, false); |
f468911f | 1260 | } |
c0951b79 TH |
1261 | } |
1262 | ||
fd11a3c0 SY |
1263 | |
1264 | ||
1265 | /** | |
1266 | * vmw_query_readback_all - Read back cached query states | |
1267 | * | |
1268 | * @dx_query_mob: Buffer containing the DX query MOB | |
1269 | * | |
1270 | * Read back cached states from the device if they exist. This function | |
1271 | * assumings binding_mutex is held. | |
1272 | */ | |
1273 | int vmw_query_readback_all(struct vmw_dma_buffer *dx_query_mob) | |
1274 | { | |
1275 | struct vmw_resource *dx_query_ctx; | |
1276 | struct vmw_private *dev_priv; | |
1277 | struct { | |
1278 | SVGA3dCmdHeader header; | |
1279 | SVGA3dCmdDXReadbackAllQuery body; | |
1280 | } *cmd; | |
1281 | ||
1282 | ||
1283 | /* No query bound, so do nothing */ | |
1284 | if (!dx_query_mob || !dx_query_mob->dx_query_ctx) | |
1285 | return 0; | |
1286 | ||
1287 | dx_query_ctx = dx_query_mob->dx_query_ctx; | |
1288 | dev_priv = dx_query_ctx->dev_priv; | |
1289 | ||
1290 | cmd = vmw_fifo_reserve_dx(dev_priv, sizeof(*cmd), dx_query_ctx->id); | |
1291 | if (unlikely(cmd == NULL)) { | |
1292 | DRM_ERROR("Failed reserving FIFO space for " | |
1293 | "query MOB read back.\n"); | |
1294 | return -ENOMEM; | |
1295 | } | |
1296 | ||
1297 | cmd->header.id = SVGA_3D_CMD_DX_READBACK_ALL_QUERY; | |
1298 | cmd->header.size = sizeof(cmd->body); | |
1299 | cmd->body.cid = dx_query_ctx->id; | |
1300 | ||
1301 | vmw_fifo_commit(dev_priv, sizeof(*cmd)); | |
1302 | ||
1303 | /* Triggers a rebind the next time affected context is bound */ | |
1304 | dx_query_mob->dx_query_ctx = NULL; | |
1305 | ||
1306 | return 0; | |
1307 | } | |
1308 | ||
1309 | ||
1310 | ||
1311 | /** | |
1312 | * vmw_query_move_notify - Read back cached query states | |
1313 | * | |
1314 | * @bo: The TTM buffer object about to move. | |
1315 | * @mem: The memory region @bo is moving to. | |
1316 | * | |
1317 | * Called before the query MOB is swapped out to read back cached query | |
1318 | * states from the device. | |
1319 | */ | |
1320 | void vmw_query_move_notify(struct ttm_buffer_object *bo, | |
1321 | struct ttm_mem_reg *mem) | |
1322 | { | |
1323 | struct vmw_dma_buffer *dx_query_mob; | |
1324 | struct ttm_bo_device *bdev = bo->bdev; | |
1325 | struct vmw_private *dev_priv; | |
1326 | ||
1327 | ||
1328 | dev_priv = container_of(bdev, struct vmw_private, bdev); | |
1329 | ||
1330 | mutex_lock(&dev_priv->binding_mutex); | |
1331 | ||
1332 | dx_query_mob = container_of(bo, struct vmw_dma_buffer, base); | |
1333 | if (mem == NULL || !dx_query_mob || !dx_query_mob->dx_query_ctx) { | |
1334 | mutex_unlock(&dev_priv->binding_mutex); | |
1335 | return; | |
1336 | } | |
1337 | ||
1338 | /* If BO is being moved from MOB to system memory */ | |
1339 | if (mem->mem_type == TTM_PL_SYSTEM && bo->mem.mem_type == VMW_PL_MOB) { | |
1340 | struct vmw_fence_obj *fence; | |
1341 | ||
1342 | (void) vmw_query_readback_all(dx_query_mob); | |
1343 | mutex_unlock(&dev_priv->binding_mutex); | |
1344 | ||
1345 | /* Create a fence and attach the BO to it */ | |
1346 | (void) vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL); | |
1347 | vmw_fence_single_bo(bo, fence); | |
1348 | ||
1349 | if (fence != NULL) | |
1350 | vmw_fence_obj_unreference(&fence); | |
1351 | ||
8aa6d4fc | 1352 | (void) ttm_bo_wait(bo, false, false); |
fd11a3c0 SY |
1353 | } else |
1354 | mutex_unlock(&dev_priv->binding_mutex); | |
1355 | ||
1356 | } | |
1357 | ||
c0951b79 TH |
1358 | /** |
1359 | * vmw_resource_needs_backup - Return whether a resource needs a backup buffer. | |
1360 | * | |
1361 | * @res: The resource being queried. | |
1362 | */ | |
1363 | bool vmw_resource_needs_backup(const struct vmw_resource *res) | |
1364 | { | |
1365 | return res->func->needs_backup; | |
1366 | } | |
1367 | ||
1368 | /** | |
1369 | * vmw_resource_evict_type - Evict all resources of a specific type | |
1370 | * | |
1371 | * @dev_priv: Pointer to a device private struct | |
1372 | * @type: The resource type to evict | |
1373 | * | |
1374 | * To avoid thrashing starvation or as part of the hibernation sequence, | |
ea029c28 | 1375 | * try to evict all evictable resources of a specific type. |
c0951b79 TH |
1376 | */ |
1377 | static void vmw_resource_evict_type(struct vmw_private *dev_priv, | |
1378 | enum vmw_res_type type) | |
1379 | { | |
1380 | struct list_head *lru_list = &dev_priv->res_lru[type]; | |
1381 | struct vmw_resource *evict_res; | |
ea029c28 TH |
1382 | unsigned err_count = 0; |
1383 | int ret; | |
c0951b79 TH |
1384 | |
1385 | do { | |
1386 | write_lock(&dev_priv->resource_lock); | |
1387 | ||
1388 | if (list_empty(lru_list)) | |
1389 | goto out_unlock; | |
1390 | ||
1391 | evict_res = vmw_resource_reference( | |
1392 | list_first_entry(lru_list, struct vmw_resource, | |
1393 | lru_head)); | |
1394 | list_del_init(&evict_res->lru_head); | |
1395 | write_unlock(&dev_priv->resource_lock); | |
ea029c28 TH |
1396 | |
1397 | ret = vmw_resource_do_evict(evict_res, false); | |
1398 | if (unlikely(ret != 0)) { | |
1399 | write_lock(&dev_priv->resource_lock); | |
1400 | list_add_tail(&evict_res->lru_head, lru_list); | |
1401 | write_unlock(&dev_priv->resource_lock); | |
1402 | if (++err_count > VMW_RES_EVICT_ERR_COUNT) { | |
1403 | vmw_resource_unreference(&evict_res); | |
1404 | return; | |
1405 | } | |
1406 | } | |
1407 | ||
c0951b79 TH |
1408 | vmw_resource_unreference(&evict_res); |
1409 | } while (1); | |
1410 | ||
1411 | out_unlock: | |
1412 | write_unlock(&dev_priv->resource_lock); | |
1413 | } | |
1414 | ||
1415 | /** | |
1416 | * vmw_resource_evict_all - Evict all evictable resources | |
1417 | * | |
1418 | * @dev_priv: Pointer to a device private struct | |
1419 | * | |
1420 | * To avoid thrashing starvation or as part of the hibernation sequence, | |
1421 | * evict all evictable resources. In particular this means that all | |
1422 | * guest-backed resources that are registered with the device are | |
1423 | * evicted and the OTable becomes clean. | |
1424 | */ | |
1425 | void vmw_resource_evict_all(struct vmw_private *dev_priv) | |
1426 | { | |
1427 | enum vmw_res_type type; | |
1428 | ||
1429 | mutex_lock(&dev_priv->cmdbuf_mutex); | |
1430 | ||
1431 | for (type = 0; type < vmw_res_max; ++type) | |
1432 | vmw_resource_evict_type(dev_priv, type); | |
1433 | ||
1434 | mutex_unlock(&dev_priv->cmdbuf_mutex); | |
1435 | } | |
ed93394c TH |
1436 | |
1437 | /** | |
1438 | * vmw_resource_pin - Add a pin reference on a resource | |
1439 | * | |
1440 | * @res: The resource to add a pin reference on | |
1441 | * | |
1442 | * This function adds a pin reference, and if needed validates the resource. | |
1443 | * Having a pin reference means that the resource can never be evicted, and | |
1444 | * its id will never change as long as there is a pin reference. | |
1445 | * This function returns 0 on success and a negative error code on failure. | |
1446 | */ | |
1a4b172a | 1447 | int vmw_resource_pin(struct vmw_resource *res, bool interruptible) |
ed93394c TH |
1448 | { |
1449 | struct vmw_private *dev_priv = res->dev_priv; | |
1450 | int ret; | |
1451 | ||
1a4b172a | 1452 | ttm_write_lock(&dev_priv->reservation_sem, interruptible); |
ed93394c | 1453 | mutex_lock(&dev_priv->cmdbuf_mutex); |
1a4b172a | 1454 | ret = vmw_resource_reserve(res, interruptible, false); |
ed93394c TH |
1455 | if (ret) |
1456 | goto out_no_reserve; | |
1457 | ||
1458 | if (res->pin_count == 0) { | |
459d0fa7 | 1459 | struct vmw_dma_buffer *vbo = NULL; |
ed93394c TH |
1460 | |
1461 | if (res->backup) { | |
459d0fa7 TH |
1462 | vbo = res->backup; |
1463 | ||
dfd5e50e | 1464 | ttm_bo_reserve(&vbo->base, interruptible, false, NULL); |
459d0fa7 TH |
1465 | if (!vbo->pin_count) { |
1466 | ret = ttm_bo_validate | |
1467 | (&vbo->base, | |
1468 | res->func->backup_placement, | |
1a4b172a | 1469 | interruptible, false); |
459d0fa7 TH |
1470 | if (ret) { |
1471 | ttm_bo_unreserve(&vbo->base); | |
1472 | goto out_no_validate; | |
1473 | } | |
ed93394c TH |
1474 | } |
1475 | ||
1476 | /* Do we really need to pin the MOB as well? */ | |
459d0fa7 | 1477 | vmw_bo_pin_reserved(vbo, true); |
ed93394c TH |
1478 | } |
1479 | ret = vmw_resource_validate(res); | |
459d0fa7 TH |
1480 | if (vbo) |
1481 | ttm_bo_unreserve(&vbo->base); | |
ed93394c TH |
1482 | if (ret) |
1483 | goto out_no_validate; | |
1484 | } | |
1485 | res->pin_count++; | |
1486 | ||
1487 | out_no_validate: | |
d80efd5c | 1488 | vmw_resource_unreserve(res, false, NULL, 0UL); |
ed93394c TH |
1489 | out_no_reserve: |
1490 | mutex_unlock(&dev_priv->cmdbuf_mutex); | |
1491 | ttm_write_unlock(&dev_priv->reservation_sem); | |
1492 | ||
1493 | return ret; | |
1494 | } | |
1495 | ||
1496 | /** | |
1497 | * vmw_resource_unpin - Remove a pin reference from a resource | |
1498 | * | |
1499 | * @res: The resource to remove a pin reference from | |
1500 | * | |
1501 | * Having a pin reference means that the resource can never be evicted, and | |
1502 | * its id will never change as long as there is a pin reference. | |
1503 | */ | |
1504 | void vmw_resource_unpin(struct vmw_resource *res) | |
1505 | { | |
1506 | struct vmw_private *dev_priv = res->dev_priv; | |
1507 | int ret; | |
1508 | ||
f08c86c3 | 1509 | (void) ttm_read_lock(&dev_priv->reservation_sem, false); |
ed93394c TH |
1510 | mutex_lock(&dev_priv->cmdbuf_mutex); |
1511 | ||
1a4b172a | 1512 | ret = vmw_resource_reserve(res, false, true); |
ed93394c TH |
1513 | WARN_ON(ret); |
1514 | ||
1515 | WARN_ON(res->pin_count == 0); | |
1516 | if (--res->pin_count == 0 && res->backup) { | |
459d0fa7 | 1517 | struct vmw_dma_buffer *vbo = res->backup; |
ed93394c | 1518 | |
f08c86c3 | 1519 | (void) ttm_bo_reserve(&vbo->base, false, false, NULL); |
459d0fa7 TH |
1520 | vmw_bo_pin_reserved(vbo, false); |
1521 | ttm_bo_unreserve(&vbo->base); | |
ed93394c TH |
1522 | } |
1523 | ||
d80efd5c | 1524 | vmw_resource_unreserve(res, false, NULL, 0UL); |
ed93394c TH |
1525 | |
1526 | mutex_unlock(&dev_priv->cmdbuf_mutex); | |
1527 | ttm_read_unlock(&dev_priv->reservation_sem); | |
1528 | } | |
d80efd5c TH |
1529 | |
1530 | /** | |
1531 | * vmw_res_type - Return the resource type | |
1532 | * | |
1533 | * @res: Pointer to the resource | |
1534 | */ | |
1535 | enum vmw_res_type vmw_res_type(const struct vmw_resource *res) | |
1536 | { | |
1537 | return res->func->res_type; | |
1538 | } |