Commit | Line | Data |
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0a6659bd GH |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License as published by | |
4 | * the Free Software Foundation; either version 2 of the License, or | |
5 | * (at your option) any later version. | |
6 | */ | |
7 | ||
8 | #include "bochs.h" | |
9 | ||
10 | static void bochs_ttm_placement(struct bochs_bo *bo, int domain); | |
11 | ||
12 | /* ---------------------------------------------------------------------- */ | |
13 | ||
14 | static inline struct bochs_device *bochs_bdev(struct ttm_bo_device *bd) | |
15 | { | |
16 | return container_of(bd, struct bochs_device, ttm.bdev); | |
17 | } | |
18 | ||
19 | static int bochs_ttm_mem_global_init(struct drm_global_reference *ref) | |
20 | { | |
21 | return ttm_mem_global_init(ref->object); | |
22 | } | |
23 | ||
24 | static void bochs_ttm_mem_global_release(struct drm_global_reference *ref) | |
25 | { | |
26 | ttm_mem_global_release(ref->object); | |
27 | } | |
28 | ||
29 | static int bochs_ttm_global_init(struct bochs_device *bochs) | |
30 | { | |
31 | struct drm_global_reference *global_ref; | |
32 | int r; | |
33 | ||
34 | global_ref = &bochs->ttm.mem_global_ref; | |
35 | global_ref->global_type = DRM_GLOBAL_TTM_MEM; | |
36 | global_ref->size = sizeof(struct ttm_mem_global); | |
37 | global_ref->init = &bochs_ttm_mem_global_init; | |
38 | global_ref->release = &bochs_ttm_mem_global_release; | |
39 | r = drm_global_item_ref(global_ref); | |
40 | if (r != 0) { | |
41 | DRM_ERROR("Failed setting up TTM memory accounting " | |
42 | "subsystem.\n"); | |
43 | return r; | |
44 | } | |
45 | ||
46 | bochs->ttm.bo_global_ref.mem_glob = | |
47 | bochs->ttm.mem_global_ref.object; | |
48 | global_ref = &bochs->ttm.bo_global_ref.ref; | |
49 | global_ref->global_type = DRM_GLOBAL_TTM_BO; | |
50 | global_ref->size = sizeof(struct ttm_bo_global); | |
51 | global_ref->init = &ttm_bo_global_init; | |
52 | global_ref->release = &ttm_bo_global_release; | |
53 | r = drm_global_item_ref(global_ref); | |
54 | if (r != 0) { | |
55 | DRM_ERROR("Failed setting up TTM BO subsystem.\n"); | |
56 | drm_global_item_unref(&bochs->ttm.mem_global_ref); | |
57 | return r; | |
58 | } | |
59 | ||
60 | return 0; | |
61 | } | |
62 | ||
63 | static void bochs_ttm_global_release(struct bochs_device *bochs) | |
64 | { | |
65 | if (bochs->ttm.mem_global_ref.release == NULL) | |
66 | return; | |
67 | ||
68 | drm_global_item_unref(&bochs->ttm.bo_global_ref.ref); | |
69 | drm_global_item_unref(&bochs->ttm.mem_global_ref); | |
70 | bochs->ttm.mem_global_ref.release = NULL; | |
71 | } | |
72 | ||
73 | ||
74 | static void bochs_bo_ttm_destroy(struct ttm_buffer_object *tbo) | |
75 | { | |
76 | struct bochs_bo *bo; | |
77 | ||
78 | bo = container_of(tbo, struct bochs_bo, bo); | |
79 | drm_gem_object_release(&bo->gem); | |
80 | kfree(bo); | |
81 | } | |
82 | ||
83 | static bool bochs_ttm_bo_is_bochs_bo(struct ttm_buffer_object *bo) | |
84 | { | |
85 | if (bo->destroy == &bochs_bo_ttm_destroy) | |
86 | return true; | |
87 | return false; | |
88 | } | |
89 | ||
90 | static int bochs_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type, | |
91 | struct ttm_mem_type_manager *man) | |
92 | { | |
93 | switch (type) { | |
94 | case TTM_PL_SYSTEM: | |
95 | man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; | |
96 | man->available_caching = TTM_PL_MASK_CACHING; | |
97 | man->default_caching = TTM_PL_FLAG_CACHED; | |
98 | break; | |
99 | case TTM_PL_VRAM: | |
100 | man->func = &ttm_bo_manager_func; | |
101 | man->flags = TTM_MEMTYPE_FLAG_FIXED | | |
102 | TTM_MEMTYPE_FLAG_MAPPABLE; | |
103 | man->available_caching = TTM_PL_FLAG_UNCACHED | | |
104 | TTM_PL_FLAG_WC; | |
105 | man->default_caching = TTM_PL_FLAG_WC; | |
106 | break; | |
107 | default: | |
108 | DRM_ERROR("Unsupported memory type %u\n", (unsigned)type); | |
109 | return -EINVAL; | |
110 | } | |
111 | return 0; | |
112 | } | |
113 | ||
114 | static void | |
115 | bochs_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl) | |
116 | { | |
117 | struct bochs_bo *bochsbo = bochs_bo(bo); | |
118 | ||
119 | if (!bochs_ttm_bo_is_bochs_bo(bo)) | |
120 | return; | |
121 | ||
122 | bochs_ttm_placement(bochsbo, TTM_PL_FLAG_SYSTEM); | |
123 | *pl = bochsbo->placement; | |
124 | } | |
125 | ||
126 | static int bochs_bo_verify_access(struct ttm_buffer_object *bo, | |
127 | struct file *filp) | |
128 | { | |
129 | struct bochs_bo *bochsbo = bochs_bo(bo); | |
130 | ||
131 | return drm_vma_node_verify_access(&bochsbo->gem.vma_node, filp); | |
132 | } | |
133 | ||
134 | static int bochs_ttm_io_mem_reserve(struct ttm_bo_device *bdev, | |
135 | struct ttm_mem_reg *mem) | |
136 | { | |
137 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
138 | struct bochs_device *bochs = bochs_bdev(bdev); | |
139 | ||
140 | mem->bus.addr = NULL; | |
141 | mem->bus.offset = 0; | |
142 | mem->bus.size = mem->num_pages << PAGE_SHIFT; | |
143 | mem->bus.base = 0; | |
144 | mem->bus.is_iomem = false; | |
145 | if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) | |
146 | return -EINVAL; | |
147 | switch (mem->mem_type) { | |
148 | case TTM_PL_SYSTEM: | |
149 | /* system memory */ | |
150 | return 0; | |
151 | case TTM_PL_VRAM: | |
152 | mem->bus.offset = mem->start << PAGE_SHIFT; | |
153 | mem->bus.base = bochs->fb_base; | |
154 | mem->bus.is_iomem = true; | |
155 | break; | |
156 | default: | |
157 | return -EINVAL; | |
158 | break; | |
159 | } | |
160 | return 0; | |
161 | } | |
162 | ||
163 | static void bochs_ttm_io_mem_free(struct ttm_bo_device *bdev, | |
164 | struct ttm_mem_reg *mem) | |
165 | { | |
166 | } | |
167 | ||
0a6659bd GH |
168 | static void bochs_ttm_backend_destroy(struct ttm_tt *tt) |
169 | { | |
170 | ttm_tt_fini(tt); | |
171 | kfree(tt); | |
172 | } | |
173 | ||
174 | static struct ttm_backend_func bochs_tt_backend_func = { | |
175 | .destroy = &bochs_ttm_backend_destroy, | |
176 | }; | |
177 | ||
178 | static struct ttm_tt *bochs_ttm_tt_create(struct ttm_bo_device *bdev, | |
179 | unsigned long size, | |
180 | uint32_t page_flags, | |
181 | struct page *dummy_read_page) | |
182 | { | |
183 | struct ttm_tt *tt; | |
184 | ||
185 | tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL); | |
186 | if (tt == NULL) | |
187 | return NULL; | |
188 | tt->func = &bochs_tt_backend_func; | |
189 | if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) { | |
190 | kfree(tt); | |
191 | return NULL; | |
192 | } | |
193 | return tt; | |
194 | } | |
195 | ||
196 | struct ttm_bo_driver bochs_bo_driver = { | |
197 | .ttm_tt_create = bochs_ttm_tt_create, | |
198 | .ttm_tt_populate = ttm_pool_populate, | |
199 | .ttm_tt_unpopulate = ttm_pool_unpopulate, | |
200 | .init_mem_type = bochs_bo_init_mem_type, | |
201 | .evict_flags = bochs_bo_evict_flags, | |
18885778 | 202 | .move = NULL, |
0a6659bd GH |
203 | .verify_access = bochs_bo_verify_access, |
204 | .io_mem_reserve = &bochs_ttm_io_mem_reserve, | |
205 | .io_mem_free = &bochs_ttm_io_mem_free, | |
98c2872a CK |
206 | .lru_tail = &ttm_bo_default_lru_tail, |
207 | .swap_lru_tail = &ttm_bo_default_swap_lru_tail, | |
0a6659bd GH |
208 | }; |
209 | ||
210 | int bochs_mm_init(struct bochs_device *bochs) | |
211 | { | |
212 | struct ttm_bo_device *bdev = &bochs->ttm.bdev; | |
213 | int ret; | |
214 | ||
215 | ret = bochs_ttm_global_init(bochs); | |
216 | if (ret) | |
217 | return ret; | |
218 | ||
219 | ret = ttm_bo_device_init(&bochs->ttm.bdev, | |
220 | bochs->ttm.bo_global_ref.ref.object, | |
44d847b7 DH |
221 | &bochs_bo_driver, |
222 | bochs->dev->anon_inode->i_mapping, | |
223 | DRM_FILE_PAGE_OFFSET, | |
0a6659bd GH |
224 | true); |
225 | if (ret) { | |
226 | DRM_ERROR("Error initialising bo driver; %d\n", ret); | |
227 | return ret; | |
228 | } | |
229 | ||
230 | ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM, | |
231 | bochs->fb_size >> PAGE_SHIFT); | |
232 | if (ret) { | |
233 | DRM_ERROR("Failed ttm VRAM init: %d\n", ret); | |
234 | return ret; | |
235 | } | |
236 | ||
237 | bochs->ttm.initialized = true; | |
238 | return 0; | |
239 | } | |
240 | ||
241 | void bochs_mm_fini(struct bochs_device *bochs) | |
242 | { | |
243 | if (!bochs->ttm.initialized) | |
244 | return; | |
245 | ||
246 | ttm_bo_device_release(&bochs->ttm.bdev); | |
247 | bochs_ttm_global_release(bochs); | |
248 | bochs->ttm.initialized = false; | |
249 | } | |
250 | ||
251 | static void bochs_ttm_placement(struct bochs_bo *bo, int domain) | |
252 | { | |
f1217ed0 | 253 | unsigned i; |
0a6659bd | 254 | u32 c = 0; |
0a6659bd GH |
255 | bo->placement.placement = bo->placements; |
256 | bo->placement.busy_placement = bo->placements; | |
257 | if (domain & TTM_PL_FLAG_VRAM) { | |
f1217ed0 CK |
258 | bo->placements[c++].flags = TTM_PL_FLAG_WC |
259 | | TTM_PL_FLAG_UNCACHED | |
0a6659bd GH |
260 | | TTM_PL_FLAG_VRAM; |
261 | } | |
262 | if (domain & TTM_PL_FLAG_SYSTEM) { | |
f1217ed0 CK |
263 | bo->placements[c++].flags = TTM_PL_MASK_CACHING |
264 | | TTM_PL_FLAG_SYSTEM; | |
0a6659bd GH |
265 | } |
266 | if (!c) { | |
f1217ed0 CK |
267 | bo->placements[c++].flags = TTM_PL_MASK_CACHING |
268 | | TTM_PL_FLAG_SYSTEM; | |
269 | } | |
270 | for (i = 0; i < c; ++i) { | |
271 | bo->placements[i].fpfn = 0; | |
272 | bo->placements[i].lpfn = 0; | |
0a6659bd GH |
273 | } |
274 | bo->placement.num_placement = c; | |
275 | bo->placement.num_busy_placement = c; | |
276 | } | |
277 | ||
278 | static inline u64 bochs_bo_gpu_offset(struct bochs_bo *bo) | |
279 | { | |
280 | return bo->bo.offset; | |
281 | } | |
282 | ||
283 | int bochs_bo_pin(struct bochs_bo *bo, u32 pl_flag, u64 *gpu_addr) | |
284 | { | |
285 | int i, ret; | |
286 | ||
287 | if (bo->pin_count) { | |
288 | bo->pin_count++; | |
289 | if (gpu_addr) | |
290 | *gpu_addr = bochs_bo_gpu_offset(bo); | |
291 | return 0; | |
292 | } | |
293 | ||
294 | bochs_ttm_placement(bo, pl_flag); | |
295 | for (i = 0; i < bo->placement.num_placement; i++) | |
f1217ed0 | 296 | bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT; |
0a6659bd GH |
297 | ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false); |
298 | if (ret) | |
299 | return ret; | |
300 | ||
301 | bo->pin_count = 1; | |
302 | if (gpu_addr) | |
303 | *gpu_addr = bochs_bo_gpu_offset(bo); | |
304 | return 0; | |
305 | } | |
306 | ||
307 | int bochs_bo_unpin(struct bochs_bo *bo) | |
308 | { | |
309 | int i, ret; | |
310 | ||
311 | if (!bo->pin_count) { | |
312 | DRM_ERROR("unpin bad %p\n", bo); | |
313 | return 0; | |
314 | } | |
315 | bo->pin_count--; | |
316 | ||
317 | if (bo->pin_count) | |
318 | return 0; | |
319 | ||
320 | for (i = 0; i < bo->placement.num_placement; i++) | |
f1217ed0 | 321 | bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT; |
0a6659bd GH |
322 | ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false); |
323 | if (ret) | |
324 | return ret; | |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
329 | int bochs_mmap(struct file *filp, struct vm_area_struct *vma) | |
330 | { | |
331 | struct drm_file *file_priv; | |
332 | struct bochs_device *bochs; | |
333 | ||
334 | if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) | |
884c6dab | 335 | return -EINVAL; |
0a6659bd GH |
336 | |
337 | file_priv = filp->private_data; | |
338 | bochs = file_priv->minor->dev->dev_private; | |
339 | return ttm_bo_mmap(filp, vma, &bochs->ttm.bdev); | |
340 | } | |
341 | ||
342 | /* ---------------------------------------------------------------------- */ | |
343 | ||
344 | static int bochs_bo_create(struct drm_device *dev, int size, int align, | |
345 | uint32_t flags, struct bochs_bo **pbochsbo) | |
346 | { | |
347 | struct bochs_device *bochs = dev->dev_private; | |
348 | struct bochs_bo *bochsbo; | |
349 | size_t acc_size; | |
350 | int ret; | |
351 | ||
352 | bochsbo = kzalloc(sizeof(struct bochs_bo), GFP_KERNEL); | |
353 | if (!bochsbo) | |
354 | return -ENOMEM; | |
355 | ||
356 | ret = drm_gem_object_init(dev, &bochsbo->gem, size); | |
357 | if (ret) { | |
358 | kfree(bochsbo); | |
359 | return ret; | |
360 | } | |
361 | ||
362 | bochsbo->bo.bdev = &bochs->ttm.bdev; | |
6796cb16 | 363 | bochsbo->bo.bdev->dev_mapping = dev->anon_inode->i_mapping; |
0a6659bd GH |
364 | |
365 | bochs_ttm_placement(bochsbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM); | |
366 | ||
367 | acc_size = ttm_bo_dma_acc_size(&bochs->ttm.bdev, size, | |
368 | sizeof(struct bochs_bo)); | |
369 | ||
370 | ret = ttm_bo_init(&bochs->ttm.bdev, &bochsbo->bo, size, | |
371 | ttm_bo_type_device, &bochsbo->placement, | |
372 | align >> PAGE_SHIFT, false, NULL, acc_size, | |
f4f4e3e3 | 373 | NULL, NULL, bochs_bo_ttm_destroy); |
0a6659bd GH |
374 | if (ret) |
375 | return ret; | |
376 | ||
377 | *pbochsbo = bochsbo; | |
378 | return 0; | |
379 | } | |
380 | ||
381 | int bochs_gem_create(struct drm_device *dev, u32 size, bool iskernel, | |
382 | struct drm_gem_object **obj) | |
383 | { | |
384 | struct bochs_bo *bochsbo; | |
385 | int ret; | |
386 | ||
387 | *obj = NULL; | |
388 | ||
a8ba29cd | 389 | size = PAGE_ALIGN(size); |
0a6659bd GH |
390 | if (size == 0) |
391 | return -EINVAL; | |
392 | ||
393 | ret = bochs_bo_create(dev, size, 0, 0, &bochsbo); | |
394 | if (ret) { | |
395 | if (ret != -ERESTARTSYS) | |
396 | DRM_ERROR("failed to allocate GEM object\n"); | |
397 | return ret; | |
398 | } | |
399 | *obj = &bochsbo->gem; | |
400 | return 0; | |
401 | } | |
402 | ||
403 | int bochs_dumb_create(struct drm_file *file, struct drm_device *dev, | |
404 | struct drm_mode_create_dumb *args) | |
405 | { | |
406 | struct drm_gem_object *gobj; | |
407 | u32 handle; | |
408 | int ret; | |
409 | ||
410 | args->pitch = args->width * ((args->bpp + 7) / 8); | |
411 | args->size = args->pitch * args->height; | |
412 | ||
413 | ret = bochs_gem_create(dev, args->size, false, | |
414 | &gobj); | |
415 | if (ret) | |
416 | return ret; | |
417 | ||
418 | ret = drm_gem_handle_create(file, gobj, &handle); | |
419 | drm_gem_object_unreference_unlocked(gobj); | |
420 | if (ret) | |
421 | return ret; | |
422 | ||
423 | args->handle = handle; | |
424 | return 0; | |
425 | } | |
426 | ||
427 | static void bochs_bo_unref(struct bochs_bo **bo) | |
428 | { | |
429 | struct ttm_buffer_object *tbo; | |
430 | ||
431 | if ((*bo) == NULL) | |
432 | return; | |
433 | ||
434 | tbo = &((*bo)->bo); | |
435 | ttm_bo_unref(&tbo); | |
dcb1ee57 | 436 | *bo = NULL; |
0a6659bd GH |
437 | } |
438 | ||
439 | void bochs_gem_free_object(struct drm_gem_object *obj) | |
440 | { | |
441 | struct bochs_bo *bochs_bo = gem_to_bochs_bo(obj); | |
442 | ||
0a6659bd GH |
443 | bochs_bo_unref(&bochs_bo); |
444 | } | |
445 | ||
446 | int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev, | |
447 | uint32_t handle, uint64_t *offset) | |
448 | { | |
449 | struct drm_gem_object *obj; | |
0a6659bd GH |
450 | struct bochs_bo *bo; |
451 | ||
a8ad0bd8 | 452 | obj = drm_gem_object_lookup(file, handle); |
37ae75c8 DV |
453 | if (obj == NULL) |
454 | return -ENOENT; | |
0a6659bd GH |
455 | |
456 | bo = gem_to_bochs_bo(obj); | |
457 | *offset = bochs_bo_mmap_offset(bo); | |
458 | ||
37ae75c8 DV |
459 | drm_gem_object_unreference_unlocked(obj); |
460 | return 0; | |
0a6659bd GH |
461 | } |
462 | ||
463 | /* ---------------------------------------------------------------------- */ | |
464 | ||
465 | static void bochs_user_framebuffer_destroy(struct drm_framebuffer *fb) | |
466 | { | |
467 | struct bochs_framebuffer *bochs_fb = to_bochs_framebuffer(fb); | |
d3ae2550 ME |
468 | |
469 | drm_gem_object_unreference_unlocked(bochs_fb->obj); | |
0a6659bd GH |
470 | drm_framebuffer_cleanup(fb); |
471 | kfree(fb); | |
472 | } | |
473 | ||
474 | static const struct drm_framebuffer_funcs bochs_fb_funcs = { | |
475 | .destroy = bochs_user_framebuffer_destroy, | |
476 | }; | |
477 | ||
478 | int bochs_framebuffer_init(struct drm_device *dev, | |
479 | struct bochs_framebuffer *gfb, | |
1eb83451 | 480 | const struct drm_mode_fb_cmd2 *mode_cmd, |
0a6659bd GH |
481 | struct drm_gem_object *obj) |
482 | { | |
483 | int ret; | |
484 | ||
485 | drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd); | |
486 | gfb->obj = obj; | |
487 | ret = drm_framebuffer_init(dev, &gfb->base, &bochs_fb_funcs); | |
488 | if (ret) { | |
489 | DRM_ERROR("drm_framebuffer_init failed: %d\n", ret); | |
490 | return ret; | |
491 | } | |
492 | return 0; | |
493 | } | |
494 | ||
495 | static struct drm_framebuffer * | |
496 | bochs_user_framebuffer_create(struct drm_device *dev, | |
497 | struct drm_file *filp, | |
1eb83451 | 498 | const struct drm_mode_fb_cmd2 *mode_cmd) |
0a6659bd GH |
499 | { |
500 | struct drm_gem_object *obj; | |
501 | struct bochs_framebuffer *bochs_fb; | |
502 | int ret; | |
503 | ||
504 | DRM_DEBUG_DRIVER("%dx%d, format %c%c%c%c\n", | |
505 | mode_cmd->width, mode_cmd->height, | |
506 | (mode_cmd->pixel_format) & 0xff, | |
507 | (mode_cmd->pixel_format >> 8) & 0xff, | |
508 | (mode_cmd->pixel_format >> 16) & 0xff, | |
509 | (mode_cmd->pixel_format >> 24) & 0xff); | |
510 | ||
511 | if (mode_cmd->pixel_format != DRM_FORMAT_XRGB8888) | |
512 | return ERR_PTR(-ENOENT); | |
513 | ||
a8ad0bd8 | 514 | obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]); |
0a6659bd GH |
515 | if (obj == NULL) |
516 | return ERR_PTR(-ENOENT); | |
517 | ||
518 | bochs_fb = kzalloc(sizeof(*bochs_fb), GFP_KERNEL); | |
519 | if (!bochs_fb) { | |
520 | drm_gem_object_unreference_unlocked(obj); | |
521 | return ERR_PTR(-ENOMEM); | |
522 | } | |
523 | ||
524 | ret = bochs_framebuffer_init(dev, bochs_fb, mode_cmd, obj); | |
525 | if (ret) { | |
526 | drm_gem_object_unreference_unlocked(obj); | |
527 | kfree(bochs_fb); | |
528 | return ERR_PTR(ret); | |
529 | } | |
530 | return &bochs_fb->base; | |
531 | } | |
532 | ||
533 | const struct drm_mode_config_funcs bochs_mode_funcs = { | |
534 | .fb_create = bochs_user_framebuffer_create, | |
535 | }; |