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,
229 bochs->dev->anon_inode->i_mapping,
230 DRM_FILE_PAGE_OFFSET,
233 DRM_ERROR("Error initialising bo driver; %d\n", ret);
237 ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
238 bochs->fb_size >> PAGE_SHIFT);
240 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
244 bochs->ttm.initialized = true;
248 void bochs_mm_fini(struct bochs_device *bochs)
250 if (!bochs->ttm.initialized)
253 ttm_bo_device_release(&bochs->ttm.bdev);
254 bochs_ttm_global_release(bochs);
255 bochs->ttm.initialized = false;
258 static void bochs_ttm_placement(struct bochs_bo *bo, int domain)
262 bo->placement.placement = bo->placements;
263 bo->placement.busy_placement = bo->placements;
264 if (domain & TTM_PL_FLAG_VRAM) {
265 bo->placements[c++].flags = TTM_PL_FLAG_WC
266 | TTM_PL_FLAG_UNCACHED
269 if (domain & TTM_PL_FLAG_SYSTEM) {
270 bo->placements[c++].flags = TTM_PL_MASK_CACHING
271 | TTM_PL_FLAG_SYSTEM;
274 bo->placements[c++].flags = TTM_PL_MASK_CACHING
275 | TTM_PL_FLAG_SYSTEM;
277 for (i = 0; i < c; ++i) {
278 bo->placements[i].fpfn = 0;
279 bo->placements[i].lpfn = 0;
281 bo->placement.num_placement = c;
282 bo->placement.num_busy_placement = c;
285 static inline u64 bochs_bo_gpu_offset(struct bochs_bo *bo)
287 return bo->bo.offset;
290 int bochs_bo_pin(struct bochs_bo *bo, u32 pl_flag, u64 *gpu_addr)
297 *gpu_addr = bochs_bo_gpu_offset(bo);
301 bochs_ttm_placement(bo, pl_flag);
302 for (i = 0; i < bo->placement.num_placement; i++)
303 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
304 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
310 *gpu_addr = bochs_bo_gpu_offset(bo);
314 int bochs_bo_unpin(struct bochs_bo *bo)
318 if (!bo->pin_count) {
319 DRM_ERROR("unpin bad %p\n", bo);
327 for (i = 0; i < bo->placement.num_placement; i++)
328 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
329 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
336 int bochs_mmap(struct file *filp, struct vm_area_struct *vma)
338 struct drm_file *file_priv;
339 struct bochs_device *bochs;
341 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
342 return drm_mmap(filp, vma);
344 file_priv = filp->private_data;
345 bochs = file_priv->minor->dev->dev_private;
346 return ttm_bo_mmap(filp, vma, &bochs->ttm.bdev);
349 /* ---------------------------------------------------------------------- */
351 static int bochs_bo_create(struct drm_device *dev, int size, int align,
352 uint32_t flags, struct bochs_bo **pbochsbo)
354 struct bochs_device *bochs = dev->dev_private;
355 struct bochs_bo *bochsbo;
359 bochsbo = kzalloc(sizeof(struct bochs_bo), GFP_KERNEL);
363 ret = drm_gem_object_init(dev, &bochsbo->gem, size);
369 bochsbo->bo.bdev = &bochs->ttm.bdev;
370 bochsbo->bo.bdev->dev_mapping = dev->anon_inode->i_mapping;
372 bochs_ttm_placement(bochsbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
374 acc_size = ttm_bo_dma_acc_size(&bochs->ttm.bdev, size,
375 sizeof(struct bochs_bo));
377 ret = ttm_bo_init(&bochs->ttm.bdev, &bochsbo->bo, size,
378 ttm_bo_type_device, &bochsbo->placement,
379 align >> PAGE_SHIFT, false, NULL, acc_size,
380 NULL, bochs_bo_ttm_destroy);
388 int bochs_gem_create(struct drm_device *dev, u32 size, bool iskernel,
389 struct drm_gem_object **obj)
391 struct bochs_bo *bochsbo;
396 size = PAGE_ALIGN(size);
400 ret = bochs_bo_create(dev, size, 0, 0, &bochsbo);
402 if (ret != -ERESTARTSYS)
403 DRM_ERROR("failed to allocate GEM object\n");
406 *obj = &bochsbo->gem;
410 int bochs_dumb_create(struct drm_file *file, struct drm_device *dev,
411 struct drm_mode_create_dumb *args)
413 struct drm_gem_object *gobj;
417 args->pitch = args->width * ((args->bpp + 7) / 8);
418 args->size = args->pitch * args->height;
420 ret = bochs_gem_create(dev, args->size, false,
425 ret = drm_gem_handle_create(file, gobj, &handle);
426 drm_gem_object_unreference_unlocked(gobj);
430 args->handle = handle;
434 static void bochs_bo_unref(struct bochs_bo **bo)
436 struct ttm_buffer_object *tbo;
446 void bochs_gem_free_object(struct drm_gem_object *obj)
448 struct bochs_bo *bochs_bo = gem_to_bochs_bo(obj);
450 bochs_bo_unref(&bochs_bo);
453 int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
454 uint32_t handle, uint64_t *offset)
456 struct drm_gem_object *obj;
460 mutex_lock(&dev->struct_mutex);
461 obj = drm_gem_object_lookup(dev, file, handle);
467 bo = gem_to_bochs_bo(obj);
468 *offset = bochs_bo_mmap_offset(bo);
470 drm_gem_object_unreference(obj);
473 mutex_unlock(&dev->struct_mutex);
478 /* ---------------------------------------------------------------------- */
480 static void bochs_user_framebuffer_destroy(struct drm_framebuffer *fb)
482 struct bochs_framebuffer *bochs_fb = to_bochs_framebuffer(fb);
484 drm_gem_object_unreference_unlocked(bochs_fb->obj);
485 drm_framebuffer_cleanup(fb);
489 static const struct drm_framebuffer_funcs bochs_fb_funcs = {
490 .destroy = bochs_user_framebuffer_destroy,
493 int bochs_framebuffer_init(struct drm_device *dev,
494 struct bochs_framebuffer *gfb,
495 struct drm_mode_fb_cmd2 *mode_cmd,
496 struct drm_gem_object *obj)
500 drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
502 ret = drm_framebuffer_init(dev, &gfb->base, &bochs_fb_funcs);
504 DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
510 static struct drm_framebuffer *
511 bochs_user_framebuffer_create(struct drm_device *dev,
512 struct drm_file *filp,
513 struct drm_mode_fb_cmd2 *mode_cmd)
515 struct drm_gem_object *obj;
516 struct bochs_framebuffer *bochs_fb;
519 DRM_DEBUG_DRIVER("%dx%d, format %c%c%c%c\n",
520 mode_cmd->width, mode_cmd->height,
521 (mode_cmd->pixel_format) & 0xff,
522 (mode_cmd->pixel_format >> 8) & 0xff,
523 (mode_cmd->pixel_format >> 16) & 0xff,
524 (mode_cmd->pixel_format >> 24) & 0xff);
526 if (mode_cmd->pixel_format != DRM_FORMAT_XRGB8888)
527 return ERR_PTR(-ENOENT);
529 obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]);
531 return ERR_PTR(-ENOENT);
533 bochs_fb = kzalloc(sizeof(*bochs_fb), GFP_KERNEL);
535 drm_gem_object_unreference_unlocked(obj);
536 return ERR_PTR(-ENOMEM);
539 ret = bochs_framebuffer_init(dev, bochs_fb, mode_cmd, obj);
541 drm_gem_object_unreference_unlocked(obj);
545 return &bochs_fb->base;
548 const struct drm_mode_config_funcs bochs_mode_funcs = {
549 .fb_create = bochs_user_framebuffer_create,