diff options
Diffstat (limited to 'drivers/gpu/drm/bochs/bochs_mm.c')
| -rw-r--r-- | drivers/gpu/drm/bochs/bochs_mm.c | 544 |
1 files changed, 544 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bochs/bochs_mm.c b/drivers/gpu/drm/bochs/bochs_mm.c new file mode 100644 index 00000000000..b9a695d9279 --- /dev/null +++ b/drivers/gpu/drm/bochs/bochs_mm.c @@ -0,0 +1,544 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include "bochs.h" + +static void bochs_ttm_placement(struct bochs_bo *bo, int domain); + +/* ---------------------------------------------------------------------- */ + +static inline struct bochs_device *bochs_bdev(struct ttm_bo_device *bd) +{ + return container_of(bd, struct bochs_device, ttm.bdev); +} + +static int bochs_ttm_mem_global_init(struct drm_global_reference *ref) +{ + return ttm_mem_global_init(ref->object); +} + +static void bochs_ttm_mem_global_release(struct drm_global_reference *ref) +{ + ttm_mem_global_release(ref->object); +} + +static int bochs_ttm_global_init(struct bochs_device *bochs) +{ + struct drm_global_reference *global_ref; + int r; + + global_ref = &bochs->ttm.mem_global_ref; + global_ref->global_type = DRM_GLOBAL_TTM_MEM; + global_ref->size = sizeof(struct ttm_mem_global); + global_ref->init = &bochs_ttm_mem_global_init; + global_ref->release = &bochs_ttm_mem_global_release; + r = drm_global_item_ref(global_ref); + if (r != 0) { + DRM_ERROR("Failed setting up TTM memory accounting " + "subsystem.\n"); + return r; + } + + bochs->ttm.bo_global_ref.mem_glob = + bochs->ttm.mem_global_ref.object; + global_ref = &bochs->ttm.bo_global_ref.ref; + global_ref->global_type = DRM_GLOBAL_TTM_BO; + global_ref->size = sizeof(struct ttm_bo_global); + global_ref->init = &ttm_bo_global_init; + global_ref->release = &ttm_bo_global_release; + r = drm_global_item_ref(global_ref); + if (r != 0) { + DRM_ERROR("Failed setting up TTM BO subsystem.\n"); + drm_global_item_unref(&bochs->ttm.mem_global_ref); + return r; + } + + return 0; +} + +static void bochs_ttm_global_release(struct bochs_device *bochs) +{ + if (bochs->ttm.mem_global_ref.release == NULL) + return; + + drm_global_item_unref(&bochs->ttm.bo_global_ref.ref); + drm_global_item_unref(&bochs->ttm.mem_global_ref); + bochs->ttm.mem_global_ref.release = NULL; +} + + +static void bochs_bo_ttm_destroy(struct ttm_buffer_object *tbo) +{ + struct bochs_bo *bo; + + bo = container_of(tbo, struct bochs_bo, bo); + drm_gem_object_release(&bo->gem); + kfree(bo); +} + +static bool bochs_ttm_bo_is_bochs_bo(struct ttm_buffer_object *bo) +{ + if (bo->destroy == &bochs_bo_ttm_destroy) + return true; + return false; +} + +static int bochs_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type, + struct ttm_mem_type_manager *man) +{ + switch (type) { + case TTM_PL_SYSTEM: + man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; + man->available_caching = TTM_PL_MASK_CACHING; + man->default_caching = TTM_PL_FLAG_CACHED; + break; + case TTM_PL_VRAM: + man->func = &ttm_bo_manager_func; + man->flags = TTM_MEMTYPE_FLAG_FIXED | + TTM_MEMTYPE_FLAG_MAPPABLE; + man->available_caching = TTM_PL_FLAG_UNCACHED | + TTM_PL_FLAG_WC; + man->default_caching = TTM_PL_FLAG_WC; + break; + default: + DRM_ERROR("Unsupported memory type %u\n", (unsigned)type); + return -EINVAL; + } + return 0; +} + +static void +bochs_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl) +{ + struct bochs_bo *bochsbo = bochs_bo(bo); + + if (!bochs_ttm_bo_is_bochs_bo(bo)) + return; + + bochs_ttm_placement(bochsbo, TTM_PL_FLAG_SYSTEM); + *pl = bochsbo->placement; +} + +static int bochs_bo_verify_access(struct ttm_buffer_object *bo, + struct file *filp) +{ + struct bochs_bo *bochsbo = bochs_bo(bo); + + return drm_vma_node_verify_access(&bochsbo->gem.vma_node, filp); +} + +static int bochs_ttm_io_mem_reserve(struct ttm_bo_device *bdev, + struct ttm_mem_reg *mem) +{ + struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; + struct bochs_device *bochs = bochs_bdev(bdev); + + mem->bus.addr = NULL; + mem->bus.offset = 0; + mem->bus.size = mem->num_pages << PAGE_SHIFT; + mem->bus.base = 0; + mem->bus.is_iomem = false; + if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) + return -EINVAL; + switch (mem->mem_type) { + case TTM_PL_SYSTEM: + /* system memory */ + return 0; + case TTM_PL_VRAM: + mem->bus.offset = mem->start << PAGE_SHIFT; + mem->bus.base = bochs->fb_base; + mem->bus.is_iomem = true; + break; + default: + return -EINVAL; + break; + } + return 0; +} + +static void bochs_ttm_io_mem_free(struct ttm_bo_device *bdev, + struct ttm_mem_reg *mem) +{ +} + +static int bochs_bo_move(struct ttm_buffer_object *bo, + bool evict, bool interruptible, + bool no_wait_gpu, + struct ttm_mem_reg *new_mem) +{ + return ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem); +} + + +static void bochs_ttm_backend_destroy(struct ttm_tt *tt) +{ + ttm_tt_fini(tt); + kfree(tt); +} + +static struct ttm_backend_func bochs_tt_backend_func = { + .destroy = &bochs_ttm_backend_destroy, +}; + +static struct ttm_tt *bochs_ttm_tt_create(struct ttm_bo_device *bdev, + unsigned long size, + uint32_t page_flags, + struct page *dummy_read_page) +{ + struct ttm_tt *tt; + + tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL); + if (tt == NULL) + return NULL; + tt->func = &bochs_tt_backend_func; + if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) { + kfree(tt); + return NULL; + } + return tt; +} + +struct ttm_bo_driver bochs_bo_driver = { + .ttm_tt_create = bochs_ttm_tt_create, + .ttm_tt_populate = ttm_pool_populate, + .ttm_tt_unpopulate = ttm_pool_unpopulate, + .init_mem_type = bochs_bo_init_mem_type, + .evict_flags = bochs_bo_evict_flags, + .move = bochs_bo_move, + .verify_access = bochs_bo_verify_access, + .io_mem_reserve = &bochs_ttm_io_mem_reserve, + .io_mem_free = &bochs_ttm_io_mem_free, +}; + +int bochs_mm_init(struct bochs_device *bochs) +{ + struct ttm_bo_device *bdev = &bochs->ttm.bdev; + int ret; + + ret = bochs_ttm_global_init(bochs); + if (ret) + return ret; + + ret = ttm_bo_device_init(&bochs->ttm.bdev, + bochs->ttm.bo_global_ref.ref.object, + &bochs_bo_driver, + bochs->dev->anon_inode->i_mapping, + DRM_FILE_PAGE_OFFSET, + true); + if (ret) { + DRM_ERROR("Error initialising bo driver; %d\n", ret); + return ret; + } + + ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM, + bochs->fb_size >> PAGE_SHIFT); + if (ret) { + DRM_ERROR("Failed ttm VRAM init: %d\n", ret); + return ret; + } + + bochs->ttm.initialized = true; + return 0; +} + +void bochs_mm_fini(struct bochs_device *bochs) +{ + if (!bochs->ttm.initialized) + return; + + ttm_bo_device_release(&bochs->ttm.bdev); + bochs_ttm_global_release(bochs); + bochs->ttm.initialized = false; +} + +static void bochs_ttm_placement(struct bochs_bo *bo, int domain) +{ + u32 c = 0; + bo->placement.fpfn = 0; + bo->placement.lpfn = 0; + bo->placement.placement = bo->placements; + bo->placement.busy_placement = bo->placements; + if (domain & TTM_PL_FLAG_VRAM) { + bo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED + | TTM_PL_FLAG_VRAM; + } + if (domain & TTM_PL_FLAG_SYSTEM) { + bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM; + } + if (!c) { + bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM; + } + bo->placement.num_placement = c; + bo->placement.num_busy_placement = c; +} + +static inline u64 bochs_bo_gpu_offset(struct bochs_bo *bo) +{ + return bo->bo.offset; +} + +int bochs_bo_pin(struct bochs_bo *bo, u32 pl_flag, u64 *gpu_addr) +{ + int i, ret; + + if (bo->pin_count) { + bo->pin_count++; + if (gpu_addr) + *gpu_addr = bochs_bo_gpu_offset(bo); + return 0; + } + + bochs_ttm_placement(bo, pl_flag); + for (i = 0; i < bo->placement.num_placement; i++) + bo->placements[i] |= TTM_PL_FLAG_NO_EVICT; + ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false); + if (ret) + return ret; + + bo->pin_count = 1; + if (gpu_addr) + *gpu_addr = bochs_bo_gpu_offset(bo); + return 0; +} + +int bochs_bo_unpin(struct bochs_bo *bo) +{ + int i, ret; + + if (!bo->pin_count) { + DRM_ERROR("unpin bad %p\n", bo); + return 0; + } + bo->pin_count--; + + if (bo->pin_count) + return 0; + + for (i = 0; i < bo->placement.num_placement; i++) + bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT; + ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false); + if (ret) + return ret; + + return 0; +} + +int bochs_mmap(struct file *filp, struct vm_area_struct *vma) +{ + struct drm_file *file_priv; + struct bochs_device *bochs; + + if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) + return drm_mmap(filp, vma); + + file_priv = filp->private_data; + bochs = file_priv->minor->dev->dev_private; + return ttm_bo_mmap(filp, vma, &bochs->ttm.bdev); +} + +/* ---------------------------------------------------------------------- */ + +static int bochs_bo_create(struct drm_device *dev, int size, int align, + uint32_t flags, struct bochs_bo **pbochsbo) +{ + struct bochs_device *bochs = dev->dev_private; + struct bochs_bo *bochsbo; + size_t acc_size; + int ret; + + bochsbo = kzalloc(sizeof(struct bochs_bo), GFP_KERNEL); + if (!bochsbo) + return -ENOMEM; + + ret = drm_gem_object_init(dev, &bochsbo->gem, size); + if (ret) { + kfree(bochsbo); + return ret; + } + + bochsbo->bo.bdev = &bochs->ttm.bdev; + bochsbo->bo.bdev->dev_mapping = dev->anon_inode->i_mapping; + + bochs_ttm_placement(bochsbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM); + + acc_size = ttm_bo_dma_acc_size(&bochs->ttm.bdev, size, + sizeof(struct bochs_bo)); + + ret = ttm_bo_init(&bochs->ttm.bdev, &bochsbo->bo, size, + ttm_bo_type_device, &bochsbo->placement, + align >> PAGE_SHIFT, false, NULL, acc_size, + NULL, bochs_bo_ttm_destroy); + if (ret) + return ret; + + *pbochsbo = bochsbo; + return 0; +} + +int bochs_gem_create(struct drm_device *dev, u32 size, bool iskernel, + struct drm_gem_object **obj) +{ + struct bochs_bo *bochsbo; + int ret; + + *obj = NULL; + + size = ALIGN(size, PAGE_SIZE); + if (size == 0) + return -EINVAL; + + ret = bochs_bo_create(dev, size, 0, 0, &bochsbo); + if (ret) { + if (ret != -ERESTARTSYS) + DRM_ERROR("failed to allocate GEM object\n"); + return ret; + } + *obj = &bochsbo->gem; + return 0; +} + +int bochs_dumb_create(struct drm_file *file, struct drm_device *dev, + struct drm_mode_create_dumb *args) +{ + struct drm_gem_object *gobj; + u32 handle; + int ret; + + args->pitch = args->width * ((args->bpp + 7) / 8); + args->size = args->pitch * args->height; + + ret = bochs_gem_create(dev, args->size, false, + &gobj); + if (ret) + return ret; + + ret = drm_gem_handle_create(file, gobj, &handle); + drm_gem_object_unreference_unlocked(gobj); + if (ret) + return ret; + + args->handle = handle; + return 0; +} + +static void bochs_bo_unref(struct bochs_bo **bo) +{ + struct ttm_buffer_object *tbo; + + if ((*bo) == NULL) + return; + + tbo = &((*bo)->bo); + ttm_bo_unref(&tbo); + *bo = NULL; +} + +void bochs_gem_free_object(struct drm_gem_object *obj) +{ + struct bochs_bo *bochs_bo = gem_to_bochs_bo(obj); + + bochs_bo_unref(&bochs_bo); +} + +int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev, + uint32_t handle, uint64_t *offset) +{ + struct drm_gem_object *obj; + int ret; + struct bochs_bo *bo; + + mutex_lock(&dev->struct_mutex); + obj = drm_gem_object_lookup(dev, file, handle); + if (obj == NULL) { + ret = -ENOENT; + goto out_unlock; + } + + bo = gem_to_bochs_bo(obj); + *offset = bochs_bo_mmap_offset(bo); + + drm_gem_object_unreference(obj); + ret = 0; +out_unlock: + mutex_unlock(&dev->struct_mutex); + return ret; + +} + +/* ---------------------------------------------------------------------- */ + +static void bochs_user_framebuffer_destroy(struct drm_framebuffer *fb) +{ + struct bochs_framebuffer *bochs_fb = to_bochs_framebuffer(fb); + if (bochs_fb->obj) + drm_gem_object_unreference_unlocked(bochs_fb->obj); + drm_framebuffer_cleanup(fb); + kfree(fb); +} + +static const struct drm_framebuffer_funcs bochs_fb_funcs = { + .destroy = bochs_user_framebuffer_destroy, +}; + +int bochs_framebuffer_init(struct drm_device *dev, + struct bochs_framebuffer *gfb, + struct drm_mode_fb_cmd2 *mode_cmd, + struct drm_gem_object *obj) +{ + int ret; + + drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd); + gfb->obj = obj; + ret = drm_framebuffer_init(dev, &gfb->base, &bochs_fb_funcs); + if (ret) { + DRM_ERROR("drm_framebuffer_init failed: %d\n", ret); + return ret; + } + return 0; +} + +static struct drm_framebuffer * +bochs_user_framebuffer_create(struct drm_device *dev, + struct drm_file *filp, + struct drm_mode_fb_cmd2 *mode_cmd) +{ + struct drm_gem_object *obj; + struct bochs_framebuffer *bochs_fb; + int ret; + + DRM_DEBUG_DRIVER("%dx%d, format %c%c%c%c\n", + mode_cmd->width, mode_cmd->height, + (mode_cmd->pixel_format) & 0xff, + (mode_cmd->pixel_format >> 8) & 0xff, + (mode_cmd->pixel_format >> 16) & 0xff, + (mode_cmd->pixel_format >> 24) & 0xff); + + if (mode_cmd->pixel_format != DRM_FORMAT_XRGB8888) + return ERR_PTR(-ENOENT); + + obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]); + if (obj == NULL) + return ERR_PTR(-ENOENT); + + bochs_fb = kzalloc(sizeof(*bochs_fb), GFP_KERNEL); + if (!bochs_fb) { + drm_gem_object_unreference_unlocked(obj); + return ERR_PTR(-ENOMEM); + } + + ret = bochs_framebuffer_init(dev, bochs_fb, mode_cmd, obj); + if (ret) { + drm_gem_object_unreference_unlocked(obj); + kfree(bochs_fb); + return ERR_PTR(ret); + } + return &bochs_fb->base; +} + +const struct drm_mode_config_funcs bochs_mode_funcs = { + .fb_create = bochs_user_framebuffer_create, +}; |