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.
10 static void bochs_ttm_placement(struct bochs_bo *bo, int domain);
12 /* ---------------------------------------------------------------------- */
14 static inline struct bochs_device *bochs_bdev(struct ttm_bo_device *bd)
16 return container_of(bd, struct bochs_device, ttm.bdev);
19 static int bochs_ttm_mem_global_init(struct drm_global_reference *ref)
21 return ttm_mem_global_init(ref->object);
24 static void bochs_ttm_mem_global_release(struct drm_global_reference *ref)
26 ttm_mem_global_release(ref->object);
29 static int bochs_ttm_global_init(struct bochs_device *bochs)
31 struct drm_global_reference *global_ref;
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);
41 DRM_ERROR("Failed setting up TTM memory accounting "
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);
55 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
56 drm_global_item_unref(&bochs->ttm.mem_global_ref);
63 static void bochs_ttm_global_release(struct bochs_device *bochs)
65 if (bochs->ttm.mem_global_ref.release == NULL)
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;
74 static void bochs_bo_ttm_destroy(struct ttm_buffer_object *tbo)
78 bo = container_of(tbo, struct bochs_bo, bo);
79 drm_gem_object_release(&bo->gem);
83 static bool bochs_ttm_bo_is_bochs_bo(struct ttm_buffer_object *bo)
85 if (bo->destroy == &bochs_bo_ttm_destroy)
90 static int bochs_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
91 struct ttm_mem_type_manager *man)
95 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
96 man->available_caching = TTM_PL_MASK_CACHING;
97 man->default_caching = TTM_PL_FLAG_CACHED;
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 |
105 man->default_caching = TTM_PL_FLAG_WC;
108 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
115 bochs_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
117 struct bochs_bo *bochsbo = bochs_bo(bo);
119 if (!bochs_ttm_bo_is_bochs_bo(bo))
122 bochs_ttm_placement(bochsbo, TTM_PL_FLAG_SYSTEM);
123 *pl = bochsbo->placement;
126 static int bochs_bo_verify_access(struct ttm_buffer_object *bo,
129 struct bochs_bo *bochsbo = bochs_bo(bo);
131 return drm_vma_node_verify_access(&bochsbo->gem.vma_node, filp);
134 static int bochs_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
135 struct ttm_mem_reg *mem)
137 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
138 struct bochs_device *bochs = bochs_bdev(bdev);
140 mem->bus.addr = NULL;
142 mem->bus.size = mem->num_pages << PAGE_SHIFT;
144 mem->bus.is_iomem = false;
145 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
147 switch (mem->mem_type) {
152 mem->bus.offset = mem->start << PAGE_SHIFT;
153 mem->bus.base = bochs->fb_base;
154 mem->bus.is_iomem = true;
163 static void bochs_ttm_io_mem_free(struct ttm_bo_device *bdev,
164 struct ttm_mem_reg *mem)
168 static void bochs_ttm_backend_destroy(struct ttm_tt *tt)
174 static struct ttm_backend_func bochs_tt_backend_func = {
175 .destroy = &bochs_ttm_backend_destroy,
178 static struct ttm_tt *bochs_ttm_tt_create(struct ttm_bo_device *bdev,
181 struct page *dummy_read_page)
185 tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
188 tt->func = &bochs_tt_backend_func;
189 if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
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,
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,
206 .lru_tail = &ttm_bo_default_lru_tail,
207 .swap_lru_tail = &ttm_bo_default_swap_lru_tail,
210 int bochs_mm_init(struct bochs_device *bochs)
212 struct ttm_bo_device *bdev = &bochs->ttm.bdev;
215 ret = bochs_ttm_global_init(bochs);
219 ret = ttm_bo_device_init(&bochs->ttm.bdev,
220 bochs->ttm.bo_global_ref.ref.object,
222 bochs->dev->anon_inode->i_mapping,
223 DRM_FILE_PAGE_OFFSET,
226 DRM_ERROR("Error initialising bo driver; %d\n", ret);
230 ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
231 bochs->fb_size >> PAGE_SHIFT);
233 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
237 bochs->ttm.initialized = true;
241 void bochs_mm_fini(struct bochs_device *bochs)
243 if (!bochs->ttm.initialized)
246 ttm_bo_device_release(&bochs->ttm.bdev);
247 bochs_ttm_global_release(bochs);
248 bochs->ttm.initialized = false;
251 static void bochs_ttm_placement(struct bochs_bo *bo, int domain)
255 bo->placement.placement = bo->placements;
256 bo->placement.busy_placement = bo->placements;
257 if (domain & TTM_PL_FLAG_VRAM) {
258 bo->placements[c++].flags = TTM_PL_FLAG_WC
259 | TTM_PL_FLAG_UNCACHED
262 if (domain & TTM_PL_FLAG_SYSTEM) {
263 bo->placements[c++].flags = TTM_PL_MASK_CACHING
264 | TTM_PL_FLAG_SYSTEM;
267 bo->placements[c++].flags = TTM_PL_MASK_CACHING
268 | TTM_PL_FLAG_SYSTEM;
270 for (i = 0; i < c; ++i) {
271 bo->placements[i].fpfn = 0;
272 bo->placements[i].lpfn = 0;
274 bo->placement.num_placement = c;
275 bo->placement.num_busy_placement = c;
278 static inline u64 bochs_bo_gpu_offset(struct bochs_bo *bo)
280 return bo->bo.offset;
283 int bochs_bo_pin(struct bochs_bo *bo, u32 pl_flag, u64 *gpu_addr)
290 *gpu_addr = bochs_bo_gpu_offset(bo);
294 bochs_ttm_placement(bo, pl_flag);
295 for (i = 0; i < bo->placement.num_placement; i++)
296 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
297 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
303 *gpu_addr = bochs_bo_gpu_offset(bo);
307 int bochs_bo_unpin(struct bochs_bo *bo)
311 if (!bo->pin_count) {
312 DRM_ERROR("unpin bad %p\n", bo);
320 for (i = 0; i < bo->placement.num_placement; i++)
321 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
322 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
329 int bochs_mmap(struct file *filp, struct vm_area_struct *vma)
331 struct drm_file *file_priv;
332 struct bochs_device *bochs;
334 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
337 file_priv = filp->private_data;
338 bochs = file_priv->minor->dev->dev_private;
339 return ttm_bo_mmap(filp, vma, &bochs->ttm.bdev);
342 /* ---------------------------------------------------------------------- */
344 static int bochs_bo_create(struct drm_device *dev, int size, int align,
345 uint32_t flags, struct bochs_bo **pbochsbo)
347 struct bochs_device *bochs = dev->dev_private;
348 struct bochs_bo *bochsbo;
352 bochsbo = kzalloc(sizeof(struct bochs_bo), GFP_KERNEL);
356 ret = drm_gem_object_init(dev, &bochsbo->gem, size);
362 bochsbo->bo.bdev = &bochs->ttm.bdev;
363 bochsbo->bo.bdev->dev_mapping = dev->anon_inode->i_mapping;
365 bochs_ttm_placement(bochsbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
367 acc_size = ttm_bo_dma_acc_size(&bochs->ttm.bdev, size,
368 sizeof(struct bochs_bo));
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,
373 NULL, NULL, bochs_bo_ttm_destroy);
381 int bochs_gem_create(struct drm_device *dev, u32 size, bool iskernel,
382 struct drm_gem_object **obj)
384 struct bochs_bo *bochsbo;
389 size = PAGE_ALIGN(size);
393 ret = bochs_bo_create(dev, size, 0, 0, &bochsbo);
395 if (ret != -ERESTARTSYS)
396 DRM_ERROR("failed to allocate GEM object\n");
399 *obj = &bochsbo->gem;
403 int bochs_dumb_create(struct drm_file *file, struct drm_device *dev,
404 struct drm_mode_create_dumb *args)
406 struct drm_gem_object *gobj;
410 args->pitch = args->width * ((args->bpp + 7) / 8);
411 args->size = args->pitch * args->height;
413 ret = bochs_gem_create(dev, args->size, false,
418 ret = drm_gem_handle_create(file, gobj, &handle);
419 drm_gem_object_unreference_unlocked(gobj);
423 args->handle = handle;
427 static void bochs_bo_unref(struct bochs_bo **bo)
429 struct ttm_buffer_object *tbo;
439 void bochs_gem_free_object(struct drm_gem_object *obj)
441 struct bochs_bo *bochs_bo = gem_to_bochs_bo(obj);
443 bochs_bo_unref(&bochs_bo);
446 int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
447 uint32_t handle, uint64_t *offset)
449 struct drm_gem_object *obj;
452 obj = drm_gem_object_lookup(file, handle);
456 bo = gem_to_bochs_bo(obj);
457 *offset = bochs_bo_mmap_offset(bo);
459 drm_gem_object_unreference_unlocked(obj);
463 /* ---------------------------------------------------------------------- */
465 static void bochs_user_framebuffer_destroy(struct drm_framebuffer *fb)
467 struct bochs_framebuffer *bochs_fb = to_bochs_framebuffer(fb);
469 drm_gem_object_unreference_unlocked(bochs_fb->obj);
470 drm_framebuffer_cleanup(fb);
474 static const struct drm_framebuffer_funcs bochs_fb_funcs = {
475 .destroy = bochs_user_framebuffer_destroy,
478 int bochs_framebuffer_init(struct drm_device *dev,
479 struct bochs_framebuffer *gfb,
480 const struct drm_mode_fb_cmd2 *mode_cmd,
481 struct drm_gem_object *obj)
485 drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
487 ret = drm_framebuffer_init(dev, &gfb->base, &bochs_fb_funcs);
489 DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
495 static struct drm_framebuffer *
496 bochs_user_framebuffer_create(struct drm_device *dev,
497 struct drm_file *filp,
498 const struct drm_mode_fb_cmd2 *mode_cmd)
500 struct drm_gem_object *obj;
501 struct bochs_framebuffer *bochs_fb;
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);
511 if (mode_cmd->pixel_format != DRM_FORMAT_XRGB8888)
512 return ERR_PTR(-ENOENT);
514 obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
516 return ERR_PTR(-ENOENT);
518 bochs_fb = kzalloc(sizeof(*bochs_fb), GFP_KERNEL);
520 drm_gem_object_unreference_unlocked(obj);
521 return ERR_PTR(-ENOMEM);
524 ret = bochs_framebuffer_init(dev, bochs_fb, mode_cmd, obj);
526 drm_gem_object_unreference_unlocked(obj);
530 return &bochs_fb->base;
533 const struct drm_mode_config_funcs bochs_mode_funcs = {
534 .fb_create = bochs_user_framebuffer_create,