[PATCH v4 6/7] drm/qxl: Use drm_fb_helper deferred_io support

Noralf Trønnes
2016-04-28T15:18:36Z

Use the fbdev deferred io support in drm_fb_helper which mirrors the
one qxl has had.
This patch has only been compile tested.

Signed-off-by: Noralf TrÃ¸nnes <noralf@tronnes.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

Changes since v2:
- The drm_clip_rect_{width/height} functions are dropped, so open code it

Changes since v1:
- Add FIXME about special dirty() callback for fbdev
- Remove note in commit message about deferred worker, drm_fb_helper
is similar to qxl now.

drivers/gpu/drm/qxl/qxl_display.c | 9 +-
drivers/gpu/drm/qxl/qxl_drv.h | 7 +-
drivers/gpu/drm/qxl/qxl_fb.c | 223 ++++++++++----------------------------
drivers/gpu/drm/qxl/qxl_kms.c | 4 -
4 files changed, 65 insertions(+), 178 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index 030409a..9a03524 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -465,7 +465,7 @@ static const struct drm_crtc_funcs qxl_crtc_funcs = {
.page_flip = qxl_crtc_page_flip,
};

-static void qxl_user_framebuffer_destroy(struct drm_framebuffer *fb)
+void qxl_user_framebuffer_destroy(struct drm_framebuffer *fb)
{
struct qxl_framebuffer *qxl_fb = to_qxl_framebuffer(fb);

@@ -527,12 +527,13 @@ int
qxl_framebuffer_init(struct drm_device *dev,
struct qxl_framebuffer *qfb,
const struct drm_mode_fb_cmd2 *mode_cmd,
- struct drm_gem_object *obj)
+ struct drm_gem_object *obj,
+ const struct drm_framebuffer_funcs *funcs)
{
int ret;

qfb->obj = obj;
- ret = drm_framebuffer_init(dev, &qfb->base, &qxl_fb_funcs);
+ ret = drm_framebuffer_init(dev, &qfb->base, funcs);
if (ret) {
qfb->obj = NULL;
return ret;
@@ -999,7 +1000,7 @@ qxl_user_framebuffer_create(struct drm_device *dev,
if (qxl_fb = NULL)
return NULL;

- ret = qxl_framebuffer_init(dev, qxl_fb, mode_cmd, obj);
+ ret = qxl_framebuffer_init(dev, qxl_fb, mode_cmd, obj, &qxl_fb_funcs);
if (ret) {
kfree(qxl_fb);
drm_gem_object_unreference_unlocked(obj);
diff --git a/drivers/gpu/drm/qxl/qxl_drv.h b/drivers/gpu/drm/qxl/qxl_drv.h
index 3f3897e..3ad6604 100644
--- a/drivers/gpu/drm/qxl/qxl_drv.h
+++ b/drivers/gpu/drm/qxl/qxl_drv.h
@@ -324,8 +324,6 @@ struct qxl_device {
struct workqueue_struct *gc_queue;
struct work_struct gc_work;

- struct work_struct fb_work;
-
struct drm_property *hotplug_mode_update_property;
int monitors_config_width;
int monitors_config_height;
@@ -389,11 +387,13 @@ int qxl_get_handle_for_primary_fb(struct qxl_device *qdev,
void qxl_fbdev_set_suspend(struct qxl_device *qdev, int state);

/* qxl_display.c */
+void qxl_user_framebuffer_destroy(struct drm_framebuffer *fb);
int
qxl_framebuffer_init(struct drm_device *dev,
struct qxl_framebuffer *rfb,
const struct drm_mode_fb_cmd2 *mode_cmd,
- struct drm_gem_object *obj);
+ struct drm_gem_object *obj,
+ const struct drm_framebuffer_funcs *funcs);
void qxl_display_read_client_monitors_config(struct qxl_device *qdev);
void qxl_send_monitors_config(struct qxl_device *qdev);
int qxl_create_monitors_object(struct qxl_device *qdev);
@@ -553,7 +553,6 @@ int qxl_irq_init(struct qxl_device *qdev);
irqreturn_t qxl_irq_handler(int irq, void *arg);

/* qxl_fb.c */
-int qxl_fb_init(struct qxl_device *qdev);
bool qxl_fbdev_qobj_is_fb(struct qxl_device *qdev, struct qxl_bo *qobj);

int qxl_debugfs_add_files(struct qxl_device *qdev,
diff --git a/drivers/gpu/drm/qxl/qxl_fb.c b/drivers/gpu/drm/qxl/qxl_fb.c
index 3f7c543..739a08c 100644
--- a/drivers/gpu/drm/qxl/qxl_fb.c
+++ b/drivers/gpu/drm/qxl/qxl_fb.c
@@ -46,15 +46,6 @@ struct qxl_fbdev {
struct list_head delayed_ops;
void *shadow;
int size;
-
- /* dirty memory logging */
- struct {
- spinlock_t lock;
- unsigned x1;
- unsigned y1;
- unsigned x2;
- unsigned y2;
- } dirty;
};

static void qxl_fb_image_init(struct qxl_fb_image *qxl_fb_image,
@@ -82,169 +73,18 @@ static void qxl_fb_image_init(struct qxl_fb_image *qxl_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;
- unsigned long flags;
- u32 x1, x2, y1, y2;
-
- /* TODO: hard coding 32 bpp */
- int stride = qfbdev->qfb.base.pitches[0];
-
- spin_lock_irqsave(&qfbdev->dirty.lock, flags);
-
- x1 = qfbdev->dirty.x1;
- x2 = qfbdev->dirty.x2;
- y1 = qfbdev->dirty.y1;
- y2 = qfbdev->dirty.y2;
- qfbdev->dirty.x1 = 0;
- qfbdev->dirty.x2 = 0;
- qfbdev->dirty.y1 = 0;
- qfbdev->dirty.y2 = 0;
-
- spin_unlock_irqrestore(&qfbdev->dirty.lock, flags);
-
- /*
- * 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 + 1;
- image->height = y2 - y1 + 1;
- 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);
-}
-
-static void qxl_dirty_update(struct qxl_fbdev *qfbdev,
- int x, int y, int width, int height)
-{
- struct qxl_device *qdev = qfbdev->qdev;
- unsigned long flags;
- int x2, y2;
-
- x2 = x + width - 1;
- y2 = y + height - 1;
-
- spin_lock_irqsave(&qfbdev->dirty.lock, flags);
-
- if ((qfbdev->dirty.y2 - qfbdev->dirty.y1) &&
- (qfbdev->dirty.x2 - qfbdev->dirty.x1)) {
- if (qfbdev->dirty.y1 < y)
- y = qfbdev->dirty.y1;
- if (qfbdev->dirty.y2 > y2)
- y2 = qfbdev->dirty.y2;
- if (qfbdev->dirty.x1 < x)
- x = qfbdev->dirty.x1;
- if (qfbdev->dirty.x2 > x2)
- x2 = qfbdev->dirty.x2;
- }
-
- qfbdev->dirty.x1 = x;
- qfbdev->dirty.x2 = x2;
- qfbdev->dirty.y1 = y;
- qfbdev->dirty.y2 = y2;
-
- spin_unlock_irqrestore(&qfbdev->dirty.lock, flags);
-
- schedule_work(&qdev->fb_work);
-}
-
-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;
- qxl_dirty_update(qfbdev, 0, y1, info->var.xres, y2 - y1);
- }
-};
-
static struct fb_deferred_io qxl_defio = {
.delay = QXL_DIRTY_DELAY,
- .deferred_io = qxl_deferred_io,
+ .deferred_io = drm_fb_helper_deferred_io,
};

-static void qxl_fb_fillrect(struct fb_info *info,
- const struct fb_fillrect *rect)
-{
- struct qxl_fbdev *qfbdev = info->par;
-
- sys_fillrect(info, rect);
- qxl_dirty_update(qfbdev, rect->dx, rect->dy, rect->width,
- rect->height);
-}
-
-static void qxl_fb_copyarea(struct fb_info *info,
- const struct fb_copyarea *area)
-{
- struct qxl_fbdev *qfbdev = info->par;
-
- sys_copyarea(info, area);
- qxl_dirty_update(qfbdev, area->dx, area->dy, area->width,
- area->height);
-}
-
-static void qxl_fb_imageblit(struct fb_info *info,
- const struct fb_image *image)
-{
- struct qxl_fbdev *qfbdev = info->par;
-
- sys_imageblit(info, image);
- qxl_dirty_update(qfbdev, image->dx, image->dy, image->width,
- image->height);
-}
-
-static void qxl_fb_work(struct work_struct *work)
-{
- struct qxl_device *qdev = container_of(work, struct qxl_device, fb_work);
- struct qxl_fbdev *qfbdev = qdev->mode_info.qfbdev;
-
- qxl_fb_dirty_flush(qfbdev->helper.fbdev);
-}
-
-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_fillrect = drm_fb_helper_sys_fillrect,
+ .fb_copyarea = drm_fb_helper_sys_copyarea,
+ .fb_imageblit = drm_fb_helper_sys_imageblit,
.fb_pan_display = drm_fb_helper_pan_display,
.fb_blank = drm_fb_helper_blank,
.fb_setcmap = drm_fb_helper_setcmap,
@@ -338,6 +178,57 @@ out_unref:
return ret;
}

+/*
+ * FIXME
+ * It should not be necessary to have a special dirty() callback for fbdev.
+ */
+static int qxlfb_framebuffer_dirty(struct drm_framebuffer *fb,
+ struct drm_file *file_priv,
+ unsigned flags, unsigned color,
+ struct drm_clip_rect *clips,
+ unsigned num_clips)
+{
+ struct qxl_device *qdev = fb->dev->dev_private;
+ struct fb_info *info = qdev->fbdev_info;
+ struct qxl_fbdev *qfbdev = info->par;
+ struct qxl_fb_image qxl_fb_image;
+ struct fb_image *image = &qxl_fb_image.fb_image;
+
+ /* TODO: hard coding 32 bpp */
+ int stride = qfbdev->qfb.base.pitches[0];
+
+ /*
+ * we are using a shadow draw buffer, at qdev->surface0_shadow
+ */
+ qxl_io_log(qdev, "dirty x[%d, %d], y[%d, %d]", clips->x1, clips->x2,
+ clips->y1, clips->y2);
+ image->dx = clips->x1;
+ image->dy = clips->y1;
+ image->width = clips->x2 - clips->x1;
+ image->height = clips->y2 - clips->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 + (clips->x1 * 4) + (stride * clips->y1);
+
+ qxl_fb_image_init(&qxl_fb_image, qdev, info, NULL);
+ qxl_draw_opaque_fb(&qxl_fb_image, stride);
+
+ return 0;
+}
+
+static const struct drm_framebuffer_funcs qxlfb_fb_funcs = {
+ .destroy = qxl_user_framebuffer_destroy,
+ .dirty = qxlfb_framebuffer_dirty,
+};
+
static int qxlfb_create(struct qxl_fbdev *qfbdev,
struct drm_fb_helper_surface_size *sizes)
{
@@ -383,7 +274,8 @@ static int qxlfb_create(struct qxl_fbdev *qfbdev,

info->par = qfbdev;

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

fb = &qfbdev->qfb.base;

@@ -504,7 +396,6 @@ int qxl_fbdev_init(struct qxl_device *qdev)
qfbdev->qdev = qdev;
qdev->mode_info.qfbdev = qfbdev;
spin_lock_init(&qfbdev->delayed_ops_lock);
- spin_lock_init(&qfbdev->dirty.lock);
INIT_LIST_HEAD(&qfbdev->delayed_ops);

drm_fb_helper_prepare(qdev->ddev, &qfbdev->helper,
diff --git a/drivers/gpu/drm/qxl/qxl_kms.c b/drivers/gpu/drm/qxl/qxl_kms.c
index b2977a1..2319800 100644
--- a/drivers/gpu/drm/qxl/qxl_kms.c
+++ b/drivers/gpu/drm/qxl/qxl_kms.c
@@ -261,10 +261,6 @@ static int qxl_device_init(struct qxl_device *qdev,
qdev->gc_queue = create_singlethread_workqueue("qxl_gc");
INIT_WORK(&qdev->gc_work, qxl_gc_work);

- r = qxl_fb_init(qdev);
- if (r)
- return r;
-
return 0;
}

--
2.2.2