diff options
Diffstat (limited to 'kernel/drivers/gpu/drm/bochs/bochs_fbdev.c')
| -rw-r--r-- | kernel/drivers/gpu/drm/bochs/bochs_fbdev.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/bochs/bochs_fbdev.c b/kernel/drivers/gpu/drm/bochs/bochs_fbdev.c new file mode 100644 index 000000000..976d9798d --- /dev/null +++ b/kernel/drivers/gpu/drm/bochs/bochs_fbdev.c @@ -0,0 +1,235 @@ +/* + * 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 int bochsfb_mmap(struct fb_info *info, + struct vm_area_struct *vma) +{ + struct drm_fb_helper *fb_helper = info->par; + struct bochs_device *bochs = + container_of(fb_helper, struct bochs_device, fb.helper); + struct bochs_bo *bo = gem_to_bochs_bo(bochs->fb.gfb.obj); + + return ttm_fbdev_mmap(vma, &bo->bo); +} + +static struct fb_ops bochsfb_ops = { + .owner = THIS_MODULE, + .fb_check_var = drm_fb_helper_check_var, + .fb_set_par = drm_fb_helper_set_par, + .fb_fillrect = sys_fillrect, + .fb_copyarea = sys_copyarea, + .fb_imageblit = sys_imageblit, + .fb_pan_display = drm_fb_helper_pan_display, + .fb_blank = drm_fb_helper_blank, + .fb_setcmap = drm_fb_helper_setcmap, + .fb_mmap = bochsfb_mmap, +}; + +static int bochsfb_create_object(struct bochs_device *bochs, + struct drm_mode_fb_cmd2 *mode_cmd, + struct drm_gem_object **gobj_p) +{ + struct drm_device *dev = bochs->dev; + struct drm_gem_object *gobj; + u32 size; + int ret = 0; + + size = mode_cmd->pitches[0] * mode_cmd->height; + ret = bochs_gem_create(dev, size, true, &gobj); + if (ret) + return ret; + + *gobj_p = gobj; + return ret; +} + +static int bochsfb_create(struct drm_fb_helper *helper, + struct drm_fb_helper_surface_size *sizes) +{ + struct bochs_device *bochs = + container_of(helper, struct bochs_device, fb.helper); + struct drm_device *dev = bochs->dev; + struct fb_info *info; + struct drm_framebuffer *fb; + struct drm_mode_fb_cmd2 mode_cmd; + struct device *device = &dev->pdev->dev; + struct drm_gem_object *gobj = NULL; + struct bochs_bo *bo = NULL; + int size, ret; + + if (sizes->surface_bpp != 32) + return -EINVAL; + + mode_cmd.width = sizes->surface_width; + mode_cmd.height = sizes->surface_height; + mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8); + mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, + sizes->surface_depth); + size = mode_cmd.pitches[0] * mode_cmd.height; + + /* alloc, pin & map bo */ + ret = bochsfb_create_object(bochs, &mode_cmd, &gobj); + if (ret) { + DRM_ERROR("failed to create fbcon backing object %d\n", ret); + return ret; + } + + bo = gem_to_bochs_bo(gobj); + + ret = ttm_bo_reserve(&bo->bo, true, false, false, NULL); + if (ret) + return ret; + + ret = bochs_bo_pin(bo, TTM_PL_FLAG_VRAM, NULL); + if (ret) { + DRM_ERROR("failed to pin fbcon\n"); + ttm_bo_unreserve(&bo->bo); + return ret; + } + + ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, + &bo->kmap); + if (ret) { + DRM_ERROR("failed to kmap fbcon\n"); + ttm_bo_unreserve(&bo->bo); + return ret; + } + + ttm_bo_unreserve(&bo->bo); + + /* init fb device */ + info = framebuffer_alloc(0, device); + if (info == NULL) + return -ENOMEM; + + info->par = &bochs->fb.helper; + + ret = bochs_framebuffer_init(bochs->dev, &bochs->fb.gfb, &mode_cmd, gobj); + if (ret) + return ret; + + bochs->fb.size = size; + + /* setup helper */ + fb = &bochs->fb.gfb.base; + bochs->fb.helper.fb = fb; + bochs->fb.helper.fbdev = info; + + strcpy(info->fix.id, "bochsdrmfb"); + + info->flags = FBINFO_DEFAULT; + info->fbops = &bochsfb_ops; + + drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); + drm_fb_helper_fill_var(info, &bochs->fb.helper, sizes->fb_width, + sizes->fb_height); + + info->screen_base = bo->kmap.virtual; + info->screen_size = size; + + drm_vma_offset_remove(&bo->bo.bdev->vma_manager, &bo->bo.vma_node); + info->fix.smem_start = 0; + info->fix.smem_len = size; + + ret = fb_alloc_cmap(&info->cmap, 256, 0); + if (ret) { + DRM_ERROR("%s: can't allocate color map\n", info->fix.id); + return -ENOMEM; + } + + return 0; +} + +static int bochs_fbdev_destroy(struct bochs_device *bochs) +{ + struct bochs_framebuffer *gfb = &bochs->fb.gfb; + struct fb_info *info; + + DRM_DEBUG_DRIVER("\n"); + + if (bochs->fb.helper.fbdev) { + info = bochs->fb.helper.fbdev; + + unregister_framebuffer(info); + if (info->cmap.len) + fb_dealloc_cmap(&info->cmap); + framebuffer_release(info); + } + + if (gfb->obj) { + drm_gem_object_unreference_unlocked(gfb->obj); + gfb->obj = NULL; + } + + drm_fb_helper_fini(&bochs->fb.helper); + drm_framebuffer_unregister_private(&gfb->base); + drm_framebuffer_cleanup(&gfb->base); + + return 0; +} + +void bochs_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, + u16 blue, int regno) +{ +} + +void bochs_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, + u16 *blue, int regno) +{ + *red = regno; + *green = regno; + *blue = regno; +} + +static const struct drm_fb_helper_funcs bochs_fb_helper_funcs = { + .gamma_set = bochs_fb_gamma_set, + .gamma_get = bochs_fb_gamma_get, + .fb_probe = bochsfb_create, +}; + +int bochs_fbdev_init(struct bochs_device *bochs) +{ + int ret; + + drm_fb_helper_prepare(bochs->dev, &bochs->fb.helper, + &bochs_fb_helper_funcs); + + ret = drm_fb_helper_init(bochs->dev, &bochs->fb.helper, + 1, 1); + if (ret) + return ret; + + ret = drm_fb_helper_single_add_all_connectors(&bochs->fb.helper); + if (ret) + goto fini; + + drm_helper_disable_unused_functions(bochs->dev); + + ret = drm_fb_helper_initial_config(&bochs->fb.helper, 32); + if (ret) + goto fini; + + bochs->fb.initialized = true; + return 0; + +fini: + drm_fb_helper_fini(&bochs->fb.helper); + return ret; +} + +void bochs_fbdev_fini(struct bochs_device *bochs) +{ + if (!bochs->fb.initialized) + return; + + bochs_fbdev_destroy(bochs); + bochs->fb.initialized = false; +} |