linux/drivers/gpu/drm/qxl/qxl_fb.c
Dave Airlie cc87509d87 qxl: avoid an oops in the deferred io code.
If we are using deferred io due to plymouth or X.org fbdev driver
we will oops in memcpy due to this pointless multiply here,

removing it fixes fbdev to start and not oops.

Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-11-04 16:48:43 +10:00

716 lines
18 KiB
C

/*
* Copyright © 2013 Red Hat
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* David Airlie
*/
#include <linux/module.h>
#include <linux/fb.h>
#include "drmP.h"
#include "drm/drm.h"
#include "drm/drm_crtc.h"
#include "drm/drm_crtc_helper.h"
#include "qxl_drv.h"
#include "qxl_object.h"
#include "drm_fb_helper.h"
#define QXL_DIRTY_DELAY (HZ / 30)
#define QXL_FB_OP_FILLRECT 1
#define QXL_FB_OP_COPYAREA 2
#define QXL_FB_OP_IMAGEBLIT 3
struct qxl_fb_op {
struct list_head head;
int op_type;
union {
struct fb_fillrect fr;
struct fb_copyarea ca;
struct fb_image ib;
} op;
void *img_data;
};
struct qxl_fbdev {
struct drm_fb_helper helper;
struct qxl_framebuffer qfb;
struct list_head fbdev_list;
struct qxl_device *qdev;
spinlock_t delayed_ops_lock;
struct list_head delayed_ops;
void *shadow;
int size;
/* dirty memory logging */
struct {
spinlock_t lock;
bool active;
unsigned x1;
unsigned y1;
unsigned x2;
unsigned y2;
} dirty;
};
static void qxl_fb_image_init(struct qxl_fb_image *qxl_fb_image,
struct qxl_device *qdev, struct fb_info *info,
const struct fb_image *image)
{
qxl_fb_image->qdev = qdev;
if (info) {
qxl_fb_image->visual = info->fix.visual;
if (qxl_fb_image->visual == FB_VISUAL_TRUECOLOR ||
qxl_fb_image->visual == FB_VISUAL_DIRECTCOLOR)
memcpy(&qxl_fb_image->pseudo_palette,
info->pseudo_palette,
sizeof(qxl_fb_image->pseudo_palette));
} else {
/* fallback */
if (image->depth == 1)
qxl_fb_image->visual = FB_VISUAL_MONO10;
else
qxl_fb_image->visual = FB_VISUAL_DIRECTCOLOR;
}
if (image) {
memcpy(&qxl_fb_image->fb_image, image,
sizeof(qxl_fb_image->fb_image));
}
}
static void qxl_fb_dirty_flush(struct fb_info *info)
{
struct qxl_fbdev *qfbdev = info->par;
struct qxl_device *qdev = qfbdev->qdev;
struct qxl_fb_image qxl_fb_image;
struct fb_image *image = &qxl_fb_image.fb_image;
u32 x1, x2, y1, y2;
/* TODO: hard coding 32 bpp */
int stride = qfbdev->qfb.base.pitches[0];
x1 = qfbdev->dirty.x1;
x2 = qfbdev->dirty.x2;
y1 = qfbdev->dirty.y1;
y2 = qfbdev->dirty.y2;
/*
* we are using a shadow draw buffer, at qdev->surface0_shadow
*/
qxl_io_log(qdev, "dirty x[%d, %d], y[%d, %d]", x1, x2, y1, y2);
image->dx = x1;
image->dy = y1;
image->width = x2 - x1;
image->height = y2 - y1;
image->fg_color = 0xffffffff; /* unused, just to avoid uninitialized
warnings */
image->bg_color = 0;
image->depth = 32; /* TODO: take from somewhere? */
image->cmap.start = 0;
image->cmap.len = 0;
image->cmap.red = NULL;
image->cmap.green = NULL;
image->cmap.blue = NULL;
image->cmap.transp = NULL;
image->data = qfbdev->shadow + (x1 * 4) + (stride * y1);
qxl_fb_image_init(&qxl_fb_image, qdev, info, NULL);
qxl_draw_opaque_fb(&qxl_fb_image, stride);
qfbdev->dirty.x1 = 0;
qfbdev->dirty.x2 = 0;
qfbdev->dirty.y1 = 0;
qfbdev->dirty.y2 = 0;
}
static void qxl_deferred_io(struct fb_info *info,
struct list_head *pagelist)
{
struct qxl_fbdev *qfbdev = info->par;
unsigned long start, end, min, max;
struct page *page;
int y1, y2;
min = ULONG_MAX;
max = 0;
list_for_each_entry(page, pagelist, lru) {
start = page->index << PAGE_SHIFT;
end = start + PAGE_SIZE - 1;
min = min(min, start);
max = max(max, end);
}
if (min < max) {
y1 = min / info->fix.line_length;
y2 = (max / info->fix.line_length) + 1;
/* TODO: add spin lock? */
/* spin_lock_irqsave(&qfbdev->dirty.lock, flags); */
qfbdev->dirty.x1 = 0;
qfbdev->dirty.y1 = y1;
qfbdev->dirty.x2 = info->var.xres;
qfbdev->dirty.y2 = y2;
/* spin_unlock_irqrestore(&qfbdev->dirty.lock, flags); */
}
qxl_fb_dirty_flush(info);
};
static struct fb_deferred_io qxl_defio = {
.delay = QXL_DIRTY_DELAY,
.deferred_io = qxl_deferred_io,
};
static void qxl_fb_delayed_fillrect(struct qxl_fbdev *qfbdev,
const struct fb_fillrect *fb_rect)
{
struct qxl_fb_op *op;
unsigned long flags;
op = kmalloc(sizeof(struct qxl_fb_op), GFP_ATOMIC | __GFP_NOWARN);
if (!op)
return;
op->op.fr = *fb_rect;
op->img_data = NULL;
op->op_type = QXL_FB_OP_FILLRECT;
spin_lock_irqsave(&qfbdev->delayed_ops_lock, flags);
list_add_tail(&op->head, &qfbdev->delayed_ops);
spin_unlock_irqrestore(&qfbdev->delayed_ops_lock, flags);
}
static void qxl_fb_delayed_copyarea(struct qxl_fbdev *qfbdev,
const struct fb_copyarea *fb_copy)
{
struct qxl_fb_op *op;
unsigned long flags;
op = kmalloc(sizeof(struct qxl_fb_op), GFP_ATOMIC | __GFP_NOWARN);
if (!op)
return;
op->op.ca = *fb_copy;
op->img_data = NULL;
op->op_type = QXL_FB_OP_COPYAREA;
spin_lock_irqsave(&qfbdev->delayed_ops_lock, flags);
list_add_tail(&op->head, &qfbdev->delayed_ops);
spin_unlock_irqrestore(&qfbdev->delayed_ops_lock, flags);
}
static void qxl_fb_delayed_imageblit(struct qxl_fbdev *qfbdev,
const struct fb_image *fb_image)
{
struct qxl_fb_op *op;
unsigned long flags;
uint32_t size = fb_image->width * fb_image->height * (fb_image->depth >= 8 ? fb_image->depth / 8 : 1);
op = kmalloc(sizeof(struct qxl_fb_op) + size, GFP_ATOMIC | __GFP_NOWARN);
if (!op)
return;
op->op.ib = *fb_image;
op->img_data = (void *)(op + 1);
op->op_type = QXL_FB_OP_IMAGEBLIT;
memcpy(op->img_data, fb_image->data, size);
op->op.ib.data = op->img_data;
spin_lock_irqsave(&qfbdev->delayed_ops_lock, flags);
list_add_tail(&op->head, &qfbdev->delayed_ops);
spin_unlock_irqrestore(&qfbdev->delayed_ops_lock, flags);
}
static void qxl_fb_fillrect_internal(struct fb_info *info,
const struct fb_fillrect *fb_rect)
{
struct qxl_fbdev *qfbdev = info->par;
struct qxl_device *qdev = qfbdev->qdev;
struct qxl_rect rect;
uint32_t color;
int x = fb_rect->dx;
int y = fb_rect->dy;
int width = fb_rect->width;
int height = fb_rect->height;
uint16_t rop;
struct qxl_draw_fill qxl_draw_fill_rec;
if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
info->fix.visual == FB_VISUAL_DIRECTCOLOR)
color = ((u32 *) (info->pseudo_palette))[fb_rect->color];
else
color = fb_rect->color;
rect.left = x;
rect.right = x + width;
rect.top = y;
rect.bottom = y + height;
switch (fb_rect->rop) {
case ROP_XOR:
rop = SPICE_ROPD_OP_XOR;
break;
case ROP_COPY:
rop = SPICE_ROPD_OP_PUT;
break;
default:
pr_err("qxl_fb_fillrect(): unknown rop, "
"defaulting to SPICE_ROPD_OP_PUT\n");
rop = SPICE_ROPD_OP_PUT;
}
qxl_draw_fill_rec.qdev = qdev;
qxl_draw_fill_rec.rect = rect;
qxl_draw_fill_rec.color = color;
qxl_draw_fill_rec.rop = rop;
qxl_draw_fill(&qxl_draw_fill_rec);
}
static void qxl_fb_fillrect(struct fb_info *info,
const struct fb_fillrect *fb_rect)
{
struct qxl_fbdev *qfbdev = info->par;
struct qxl_device *qdev = qfbdev->qdev;
if (!drm_can_sleep()) {
qxl_fb_delayed_fillrect(qfbdev, fb_rect);
schedule_work(&qdev->fb_work);
return;
}
/* make sure any previous work is done */
flush_work(&qdev->fb_work);
qxl_fb_fillrect_internal(info, fb_rect);
}
static void qxl_fb_copyarea_internal(struct fb_info *info,
const struct fb_copyarea *region)
{
struct qxl_fbdev *qfbdev = info->par;
qxl_draw_copyarea(qfbdev->qdev,
region->width, region->height,
region->sx, region->sy,
region->dx, region->dy);
}
static void qxl_fb_copyarea(struct fb_info *info,
const struct fb_copyarea *region)
{
struct qxl_fbdev *qfbdev = info->par;
struct qxl_device *qdev = qfbdev->qdev;
if (!drm_can_sleep()) {
qxl_fb_delayed_copyarea(qfbdev, region);
schedule_work(&qdev->fb_work);
return;
}
/* make sure any previous work is done */
flush_work(&qdev->fb_work);
qxl_fb_copyarea_internal(info, region);
}
static void qxl_fb_imageblit_safe(struct qxl_fb_image *qxl_fb_image)
{
qxl_draw_opaque_fb(qxl_fb_image, 0);
}
static void qxl_fb_imageblit_internal(struct fb_info *info,
const struct fb_image *image)
{
struct qxl_fbdev *qfbdev = info->par;
struct qxl_fb_image qxl_fb_image;
/* ensure proper order rendering operations - TODO: must do this
* for everything. */
qxl_fb_image_init(&qxl_fb_image, qfbdev->qdev, info, image);
qxl_fb_imageblit_safe(&qxl_fb_image);
}
static void qxl_fb_imageblit(struct fb_info *info,
const struct fb_image *image)
{
struct qxl_fbdev *qfbdev = info->par;
struct qxl_device *qdev = qfbdev->qdev;
if (!drm_can_sleep()) {
qxl_fb_delayed_imageblit(qfbdev, image);
schedule_work(&qdev->fb_work);
return;
}
/* make sure any previous work is done */
flush_work(&qdev->fb_work);
qxl_fb_imageblit_internal(info, image);
}
static void qxl_fb_work(struct work_struct *work)
{
struct qxl_device *qdev = container_of(work, struct qxl_device, fb_work);
unsigned long flags;
struct qxl_fb_op *entry, *tmp;
struct qxl_fbdev *qfbdev = qdev->mode_info.qfbdev;
/* since the irq context just adds entries to the end of the
list dropping the lock should be fine, as entry isn't modified
in the operation code */
spin_lock_irqsave(&qfbdev->delayed_ops_lock, flags);
list_for_each_entry_safe(entry, tmp, &qfbdev->delayed_ops, head) {
spin_unlock_irqrestore(&qfbdev->delayed_ops_lock, flags);
switch (entry->op_type) {
case QXL_FB_OP_FILLRECT:
qxl_fb_fillrect_internal(qfbdev->helper.fbdev, &entry->op.fr);
break;
case QXL_FB_OP_COPYAREA:
qxl_fb_copyarea_internal(qfbdev->helper.fbdev, &entry->op.ca);
break;
case QXL_FB_OP_IMAGEBLIT:
qxl_fb_imageblit_internal(qfbdev->helper.fbdev, &entry->op.ib);
break;
}
spin_lock_irqsave(&qfbdev->delayed_ops_lock, flags);
list_del(&entry->head);
kfree(entry);
}
spin_unlock_irqrestore(&qfbdev->delayed_ops_lock, flags);
}
int qxl_fb_init(struct qxl_device *qdev)
{
INIT_WORK(&qdev->fb_work, qxl_fb_work);
return 0;
}
static struct fb_ops qxlfb_ops = {
.owner = THIS_MODULE,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = drm_fb_helper_set_par, /* TODO: copy vmwgfx */
.fb_fillrect = qxl_fb_fillrect,
.fb_copyarea = qxl_fb_copyarea,
.fb_imageblit = qxl_fb_imageblit,
.fb_pan_display = drm_fb_helper_pan_display,
.fb_blank = drm_fb_helper_blank,
.fb_setcmap = drm_fb_helper_setcmap,
.fb_debug_enter = drm_fb_helper_debug_enter,
.fb_debug_leave = drm_fb_helper_debug_leave,
};
static void qxlfb_destroy_pinned_object(struct drm_gem_object *gobj)
{
struct qxl_bo *qbo = gem_to_qxl_bo(gobj);
int ret;
ret = qxl_bo_reserve(qbo, false);
if (likely(ret == 0)) {
qxl_bo_kunmap(qbo);
qxl_bo_unpin(qbo);
qxl_bo_unreserve(qbo);
}
drm_gem_object_unreference_unlocked(gobj);
}
int qxl_get_handle_for_primary_fb(struct qxl_device *qdev,
struct drm_file *file_priv,
uint32_t *handle)
{
int r;
struct drm_gem_object *gobj = qdev->fbdev_qfb->obj;
BUG_ON(!gobj);
/* drm_get_handle_create adds a reference - good */
r = drm_gem_handle_create(file_priv, gobj, handle);
if (r)
return r;
return 0;
}
static int qxlfb_create_pinned_object(struct qxl_fbdev *qfbdev,
struct drm_mode_fb_cmd2 *mode_cmd,
struct drm_gem_object **gobj_p)
{
struct qxl_device *qdev = qfbdev->qdev;
struct drm_gem_object *gobj = NULL;
struct qxl_bo *qbo = NULL;
int ret;
int aligned_size, size;
int height = mode_cmd->height;
int bpp;
int depth;
drm_fb_get_bpp_depth(mode_cmd->pixel_format, &bpp, &depth);
size = mode_cmd->pitches[0] * height;
aligned_size = ALIGN(size, PAGE_SIZE);
/* TODO: unallocate and reallocate surface0 for real. Hack to just
* have a large enough surface0 for 1024x768 Xorg 32bpp mode */
ret = qxl_gem_object_create(qdev, aligned_size, 0,
QXL_GEM_DOMAIN_SURFACE,
false, /* is discardable */
false, /* is kernel (false means device) */
NULL,
&gobj);
if (ret) {
pr_err("failed to allocate framebuffer (%d)\n",
aligned_size);
return -ENOMEM;
}
qbo = gem_to_qxl_bo(gobj);
qbo->surf.width = mode_cmd->width;
qbo->surf.height = mode_cmd->height;
qbo->surf.stride = mode_cmd->pitches[0];
qbo->surf.format = SPICE_SURFACE_FMT_32_xRGB;
ret = qxl_bo_reserve(qbo, false);
if (unlikely(ret != 0))
goto out_unref;
ret = qxl_bo_pin(qbo, QXL_GEM_DOMAIN_SURFACE, NULL);
if (ret) {
qxl_bo_unreserve(qbo);
goto out_unref;
}
ret = qxl_bo_kmap(qbo, NULL);
qxl_bo_unreserve(qbo); /* unreserve, will be mmaped */
if (ret)
goto out_unref;
*gobj_p = gobj;
return 0;
out_unref:
qxlfb_destroy_pinned_object(gobj);
*gobj_p = NULL;
return ret;
}
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;
struct device *device = &qdev->pdev->dev;
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);
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 = framebuffer_alloc(0, device);
if (info == NULL) {
ret = -ENOMEM;
goto out_unref;
}
info->par = qfbdev;
qxl_framebuffer_init(qdev->ddev, &qfbdev->qfb, &mode_cmd, gobj);
fb = &qfbdev->qfb.base;
/* setup helper with fb data */
qfbdev->helper.fb = fb;
qfbdev->helper.fbdev = info;
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 = alloc_apertures(1);
if (!info->apertures) {
ret = -ENOMEM;
goto out_unref;
}
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_unref;
}
ret = fb_alloc_cmap(&info->cmap, 256, 0);
if (ret) {
ret = -ENOMEM;
goto out_unref;
}
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_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(gobj);
drm_framebuffer_cleanup(fb);
kfree(fb);
}
drm_gem_object_unreference(gobj);
return ret;
}
static int qxl_fb_find_or_create_single(
struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct qxl_fbdev *qfbdev = (struct qxl_fbdev *)helper;
int new_fb = 0;
int ret;
if (!helper->fb) {
ret = qxlfb_create(qfbdev, sizes);
if (ret)
return ret;
new_fb = 1;
}
return new_fb;
}
static int qxl_fbdev_destroy(struct drm_device *dev, struct qxl_fbdev *qfbdev)
{
struct fb_info *info;
struct qxl_framebuffer *qfb = &qfbdev->qfb;
if (qfbdev->helper.fbdev) {
info = qfbdev->helper.fbdev;
unregister_framebuffer(info);
framebuffer_release(info);
}
if (qfb->obj) {
qxlfb_destroy_pinned_object(qfb->obj);
qfb->obj = NULL;
}
drm_fb_helper_fini(&qfbdev->helper);
vfree(qfbdev->shadow);
drm_framebuffer_cleanup(&qfb->base);
return 0;
}
static struct drm_fb_helper_funcs qxl_fb_helper_funcs = {
.fb_probe = qxl_fb_find_or_create_single,
};
int qxl_fbdev_init(struct qxl_device *qdev)
{
struct qxl_fbdev *qfbdev;
int bpp_sel = 32; /* TODO: parameter from somewhere? */
int ret;
qfbdev = kzalloc(sizeof(struct qxl_fbdev), GFP_KERNEL);
if (!qfbdev)
return -ENOMEM;
qfbdev->qdev = qdev;
qdev->mode_info.qfbdev = qfbdev;
qfbdev->helper.funcs = &qxl_fb_helper_funcs;
spin_lock_init(&qfbdev->delayed_ops_lock);
INIT_LIST_HEAD(&qfbdev->delayed_ops);
ret = drm_fb_helper_init(qdev->ddev, &qfbdev->helper,
qxl_num_crtc /* num_crtc - QXL supports just 1 */,
QXLFB_CONN_LIMIT);
if (ret) {
kfree(qfbdev);
return ret;
}
drm_fb_helper_single_add_all_connectors(&qfbdev->helper);
drm_fb_helper_initial_config(&qfbdev->helper, bpp_sel);
return 0;
}
void qxl_fbdev_fini(struct qxl_device *qdev)
{
if (!qdev->mode_info.qfbdev)
return;
qxl_fbdev_destroy(qdev->ddev, qdev->mode_info.qfbdev);
kfree(qdev->mode_info.qfbdev);
qdev->mode_info.qfbdev = NULL;
}
void qxl_fbdev_set_suspend(struct qxl_device *qdev, int state)
{
fb_set_suspend(qdev->mode_info.qfbdev->helper.fbdev, state);
}
bool qxl_fbdev_qobj_is_fb(struct qxl_device *qdev, struct qxl_bo *qobj)
{
if (qobj == gem_to_qxl_bo(qdev->mode_info.qfbdev->qfb.obj))
return true;
return false;
}