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 int bochs_bo_move(struct ttm_buffer_object *bo,
169 bool evict, bool interruptible,
171 struct ttm_mem_reg *new_mem)
173 return ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem);
177 static void bochs_ttm_backend_destroy(struct ttm_tt *tt)
183 static struct ttm_backend_func bochs_tt_backend_func = {
184 .destroy = &bochs_ttm_backend_destroy,
187 static struct ttm_tt *bochs_ttm_tt_create(struct ttm_bo_device *bdev,
190 struct page *dummy_read_page)
194 tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
197 tt->func = &bochs_tt_backend_func;
198 if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
205 struct ttm_bo_driver bochs_bo_driver = {
206 .ttm_tt_create = bochs_ttm_tt_create,
207 .ttm_tt_populate = ttm_pool_populate,
208 .ttm_tt_unpopulate = ttm_pool_unpopulate,
209 .init_mem_type = bochs_bo_init_mem_type,
210 .evict_flags = bochs_bo_evict_flags,
211 .move = bochs_bo_move,
212 .verify_access = bochs_bo_verify_access,
213 .io_mem_reserve = &bochs_ttm_io_mem_reserve,
214 .io_mem_free = &bochs_ttm_io_mem_free,
217 int bochs_mm_init(struct bochs_device *bochs)
219 struct ttm_bo_device *bdev = &bochs->ttm.bdev;
222 ret = bochs_ttm_global_init(bochs);
226 ret = ttm_bo_device_init(&bochs->ttm.bdev,
227 bochs->ttm.bo_global_ref.ref.object,
228 &bochs_bo_driver, DRM_FILE_PAGE_OFFSET,
231 DRM_ERROR("Error initialising bo driver; %d\n", ret);
235 ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
236 bochs->fb_size >> PAGE_SHIFT);
238 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
242 bochs->ttm.initialized = true;
246 void bochs_mm_fini(struct bochs_device *bochs)
248 if (!bochs->ttm.initialized)
251 ttm_bo_device_release(&bochs->ttm.bdev);
252 bochs_ttm_global_release(bochs);
253 bochs->ttm.initialized = false;
256 static void bochs_ttm_placement(struct bochs_bo *bo, int domain)
259 bo->placement.fpfn = 0;
260 bo->placement.lpfn = 0;
261 bo->placement.placement = bo->placements;
262 bo->placement.busy_placement = bo->placements;
263 if (domain & TTM_PL_FLAG_VRAM) {
264 bo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED
267 if (domain & TTM_PL_FLAG_SYSTEM) {
268 bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
271 bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
273 bo->placement.num_placement = c;
274 bo->placement.num_busy_placement = c;
277 static inline u64 bochs_bo_gpu_offset(struct bochs_bo *bo)
279 return bo->bo.offset;
282 int bochs_bo_pin(struct bochs_bo *bo, u32 pl_flag, u64 *gpu_addr)
289 *gpu_addr = bochs_bo_gpu_offset(bo);
293 bochs_ttm_placement(bo, pl_flag);
294 for (i = 0; i < bo->placement.num_placement; i++)
295 bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
296 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
302 *gpu_addr = bochs_bo_gpu_offset(bo);
306 int bochs_bo_unpin(struct bochs_bo *bo)
310 if (!bo->pin_count) {
311 DRM_ERROR("unpin bad %p\n", bo);
319 for (i = 0; i < bo->placement.num_placement; i++)
320 bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
321 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
328 int bochs_mmap(struct file *filp, struct vm_area_struct *vma)
330 struct drm_file *file_priv;
331 struct bochs_device *bochs;
333 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
334 return drm_mmap(filp, vma);
336 file_priv = filp->private_data;
337 bochs = file_priv->minor->dev->dev_private;
338 return ttm_bo_mmap(filp, vma, &bochs->ttm.bdev);
341 /* ---------------------------------------------------------------------- */
343 static int bochs_bo_create(struct drm_device *dev, int size, int align,
344 uint32_t flags, struct bochs_bo **pbochsbo)
346 struct bochs_device *bochs = dev->dev_private;
347 struct bochs_bo *bochsbo;
351 bochsbo = kzalloc(sizeof(struct bochs_bo), GFP_KERNEL);
355 ret = drm_gem_object_init(dev, &bochsbo->gem, size);
361 bochsbo->bo.bdev = &bochs->ttm.bdev;
362 bochsbo->bo.bdev->dev_mapping = dev->anon_inode->i_mapping;
364 bochs_ttm_placement(bochsbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
366 acc_size = ttm_bo_dma_acc_size(&bochs->ttm.bdev, size,
367 sizeof(struct bochs_bo));
369 ret = ttm_bo_init(&bochs->ttm.bdev, &bochsbo->bo, size,
370 ttm_bo_type_device, &bochsbo->placement,
371 align >> PAGE_SHIFT, false, NULL, acc_size,
372 NULL, bochs_bo_ttm_destroy);
380 int bochs_gem_create(struct drm_device *dev, u32 size, bool iskernel,
381 struct drm_gem_object **obj)
383 struct bochs_bo *bochsbo;
388 size = ALIGN(size, PAGE_SIZE);
392 ret = bochs_bo_create(dev, size, 0, 0, &bochsbo);
394 if (ret != -ERESTARTSYS)
395 DRM_ERROR("failed to allocate GEM object\n");
398 *obj = &bochsbo->gem;
402 int bochs_dumb_create(struct drm_file *file, struct drm_device *dev,
403 struct drm_mode_create_dumb *args)
405 struct drm_gem_object *gobj;
409 args->pitch = args->width * ((args->bpp + 7) / 8);
410 args->size = args->pitch * args->height;
412 ret = bochs_gem_create(dev, args->size, false,
417 ret = drm_gem_handle_create(file, gobj, &handle);
418 drm_gem_object_unreference_unlocked(gobj);
422 args->handle = handle;
426 static void bochs_bo_unref(struct bochs_bo **bo)
428 struct ttm_buffer_object *tbo;
440 void bochs_gem_free_object(struct drm_gem_object *obj)
442 struct bochs_bo *bochs_bo = gem_to_bochs_bo(obj);
446 bochs_bo_unref(&bochs_bo);
449 int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
450 uint32_t handle, uint64_t *offset)
452 struct drm_gem_object *obj;
456 mutex_lock(&dev->struct_mutex);
457 obj = drm_gem_object_lookup(dev, file, handle);
463 bo = gem_to_bochs_bo(obj);
464 *offset = bochs_bo_mmap_offset(bo);
466 drm_gem_object_unreference(obj);
469 mutex_unlock(&dev->struct_mutex);
474 /* ---------------------------------------------------------------------- */
476 static void bochs_user_framebuffer_destroy(struct drm_framebuffer *fb)
478 struct bochs_framebuffer *bochs_fb = to_bochs_framebuffer(fb);
480 drm_gem_object_unreference_unlocked(bochs_fb->obj);
481 drm_framebuffer_cleanup(fb);
485 static const struct drm_framebuffer_funcs bochs_fb_funcs = {
486 .destroy = bochs_user_framebuffer_destroy,
489 int bochs_framebuffer_init(struct drm_device *dev,
490 struct bochs_framebuffer *gfb,
491 struct drm_mode_fb_cmd2 *mode_cmd,
492 struct drm_gem_object *obj)
496 drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
498 ret = drm_framebuffer_init(dev, &gfb->base, &bochs_fb_funcs);
500 DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
506 static struct drm_framebuffer *
507 bochs_user_framebuffer_create(struct drm_device *dev,
508 struct drm_file *filp,
509 struct drm_mode_fb_cmd2 *mode_cmd)
511 struct drm_gem_object *obj;
512 struct bochs_framebuffer *bochs_fb;
515 DRM_DEBUG_DRIVER("%dx%d, format %c%c%c%c\n",
516 mode_cmd->width, mode_cmd->height,
517 (mode_cmd->pixel_format) & 0xff,
518 (mode_cmd->pixel_format >> 8) & 0xff,
519 (mode_cmd->pixel_format >> 16) & 0xff,
520 (mode_cmd->pixel_format >> 24) & 0xff);
522 if (mode_cmd->pixel_format != DRM_FORMAT_XRGB8888)
523 return ERR_PTR(-ENOENT);
525 obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]);
527 return ERR_PTR(-ENOENT);
529 bochs_fb = kzalloc(sizeof(*bochs_fb), GFP_KERNEL);
531 drm_gem_object_unreference_unlocked(obj);
532 return ERR_PTR(-ENOMEM);
535 ret = bochs_framebuffer_init(dev, bochs_fb, mode_cmd, obj);
537 drm_gem_object_unreference_unlocked(obj);
541 return &bochs_fb->base;
544 const struct drm_mode_config_funcs bochs_mode_funcs = {
545 .fb_create = bochs_user_framebuffer_create,