C++ (Cpp) qxl_framebuffer_init Examples

Example #1

File: qxl_display.c Project: BozkurTR/kernel

static struct drm_framebuffer *
qxl_user_framebuffer_create(struct drm_device *dev,
			    struct drm_file *file_priv,
			    struct drm_mode_fb_cmd2 *mode_cmd)
{
	struct drm_gem_object *obj;
	struct qxl_framebuffer *qxl_fb;
	int ret;

	obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);

	qxl_fb = kzalloc(sizeof(*qxl_fb), GFP_KERNEL);
	if (qxl_fb == NULL)
		return NULL;

	ret = qxl_framebuffer_init(dev, qxl_fb, mode_cmd, obj);
	if (ret) {
		kfree(qxl_fb);
		drm_gem_object_unreference_unlocked(obj);
		return NULL;
	}

	return &qxl_fb->base;
}

Example #2

File: qxl_fb.c Project: 513855417/linux

static int qxlfb_create(struct qxl_fbdev *qfbdev,
			struct drm_fb_helper_surface_size *sizes)
{
	struct qxl_device *qdev = qfbdev->qdev;
	struct fb_info *info;
	struct drm_framebuffer *fb = NULL;
	struct drm_mode_fb_cmd2 mode_cmd;
	struct drm_gem_object *gobj = NULL;
	struct qxl_bo *qbo = NULL;
	int ret;
	int size;
	int bpp = sizes->surface_bpp;
	int depth = sizes->surface_depth;
	void *shadow;

	mode_cmd.width = sizes->surface_width;
	mode_cmd.height = sizes->surface_height;

	mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((bpp + 1) / 8), 64);
	mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);

	ret = qxlfb_create_pinned_object(qfbdev, &mode_cmd, &gobj);
	if (ret < 0)
		return ret;

	qbo = gem_to_qxl_bo(gobj);
	QXL_INFO(qdev, "%s: %dx%d %d\n", __func__, mode_cmd.width,
		 mode_cmd.height, mode_cmd.pitches[0]);

	shadow = vmalloc(mode_cmd.pitches[0] * mode_cmd.height);
	/* TODO: what's the usual response to memory allocation errors? */
	BUG_ON(!shadow);
	QXL_INFO(qdev,
	"surface0 at gpu offset %lld, mmap_offset %lld (virt %p, shadow %p)\n",
		 qxl_bo_gpu_offset(qbo),
		 qxl_bo_mmap_offset(qbo),
		 qbo->kptr,
		 shadow);
	size = mode_cmd.pitches[0] * mode_cmd.height;

	info = drm_fb_helper_alloc_fbi(&qfbdev->helper);
	if (IS_ERR(info)) {
		ret = PTR_ERR(info);
		goto out_unref;
	}

	info->par = qfbdev;

	qxl_framebuffer_init(qdev->ddev, &qfbdev->qfb, &mode_cmd, gobj,
			     &qxlfb_fb_funcs);

	fb = &qfbdev->qfb.base;

	/* setup helper with fb data */
	qfbdev->helper.fb = fb;

	qfbdev->shadow = shadow;
	strcpy(info->fix.id, "qxldrmfb");

	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);

	info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT;
	info->fbops = &qxlfb_ops;

	/*
	 * TODO: using gobj->size in various places in this function. Not sure
	 * what the difference between the different sizes is.
	 */
	info->fix.smem_start = qdev->vram_base; /* TODO - correct? */
	info->fix.smem_len = gobj->size;
	info->screen_base = qfbdev->shadow;
	info->screen_size = gobj->size;

	drm_fb_helper_fill_var(info, &qfbdev->helper, sizes->fb_width,
			       sizes->fb_height);

	/* setup aperture base/size for vesafb takeover */
	info->apertures->ranges[0].base = qdev->ddev->mode_config.fb_base;
	info->apertures->ranges[0].size = qdev->vram_size;

	info->fix.mmio_start = 0;
	info->fix.mmio_len = 0;

	if (info->screen_base == NULL) {
		ret = -ENOSPC;
		goto out_destroy_fbi;
	}

	info->fbdefio = &qxl_defio;
	fb_deferred_io_init(info);

	qdev->fbdev_info = info;
	qdev->fbdev_qfb = &qfbdev->qfb;
	DRM_INFO("fb mappable at 0x%lX, size %lu\n",  info->fix.smem_start, (unsigned long)info->screen_size);
	DRM_INFO("fb: depth %d, pitch %d, width %d, height %d\n", fb->depth, fb->pitches[0], fb->width, fb->height);
	return 0;

out_destroy_fbi:
	drm_fb_helper_release_fbi(&qfbdev->helper);
out_unref:
	if (qbo) {
		ret = qxl_bo_reserve(qbo, false);
		if (likely(ret == 0)) {
			qxl_bo_kunmap(qbo);
			qxl_bo_unpin(qbo);
			qxl_bo_unreserve(qbo);
		}
	}
	if (fb && ret) {
		drm_gem_object_unreference_unlocked(gobj);
		drm_framebuffer_cleanup(fb);
		kfree(fb);
	}
	drm_gem_object_unreference_unlocked(gobj);
	return ret;
}