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/*
* 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"
#include <drm/drm_atomic_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
/* ---------------------------------------------------------------------- */
static int bochsfb_mmap(struct fb_info *info,
struct vm_area_struct *vma)
{
struct drm_fb_helper *fb_helper = info->par;
struct bochs_bo *bo = gem_to_bochs_bo(fb_helper->fb->obj[0]);
return ttm_fbdev_mmap(vma, &bo->bo);
}
static struct fb_ops bochsfb_ops = {
.owner = THIS_MODULE,
DRM_FB_HELPER_DEFAULT_OPS,
.fb_fillrect = drm_fb_helper_cfb_fillrect,
.fb_copyarea = drm_fb_helper_cfb_copyarea,
.fb_imageblit = drm_fb_helper_cfb_imageblit,
.fb_mmap = bochsfb_mmap,
};
static int bochsfb_create_object(struct bochs_device *bochs,
const 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 fb_info *info;
struct drm_framebuffer *fb;
struct drm_mode_fb_cmd2 mode_cmd;
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] = sizes->surface_width * 4;
mode_cmd.pixel_format = DRM_FORMAT_HOST_XRGB8888;
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, 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 = drm_fb_helper_alloc_fbi(helper);
if (IS_ERR(info)) {
DRM_ERROR("Failed to allocate fbi: %ld\n", PTR_ERR(info));
return PTR_ERR(info);
}
info->par = &bochs->fb.helper;
fb = drm_gem_fbdev_fb_create(bochs->dev, sizes, 0, gobj, NULL);
if (IS_ERR(fb)) {
DRM_ERROR("Failed to create framebuffer: %ld\n", PTR_ERR(fb));
return PTR_ERR(fb);
}
/* setup helper */
bochs->fb.helper.fb = fb;
strcpy(info->fix.id, "bochsdrmfb");
info->fbops = &bochsfb_ops;
drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->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;
return 0;
}
static const struct drm_fb_helper_funcs bochs_fb_helper_funcs = {
.fb_probe = bochsfb_create,
};
static struct drm_framebuffer *
bochs_gem_fb_create(struct drm_device *dev, struct drm_file *file,
const struct drm_mode_fb_cmd2 *mode_cmd)
{
if (mode_cmd->pixel_format != DRM_FORMAT_XRGB8888 &&
mode_cmd->pixel_format != DRM_FORMAT_BGRX8888)
return ERR_PTR(-EINVAL);
return drm_gem_fb_create(dev, file, mode_cmd);
}
const struct drm_mode_config_funcs bochs_mode_funcs = {
.fb_create = bochs_gem_fb_create,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
};
int bochs_fbdev_init(struct bochs_device *bochs)
{
return drm_fb_helper_fbdev_setup(bochs->dev, &bochs->fb.helper,
&bochs_fb_helper_funcs, 32, 1);
}
void bochs_fbdev_fini(struct bochs_device *bochs)
{
drm_fb_helper_fbdev_teardown(bochs->dev);
}
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