static void
via_dmablit_timer(unsigned long data)
{
drm_via_blitq_t *blitq = (drm_via_blitq_t *) data;
drm_device_t *dev = blitq->dev;
int engine = (int)
(blitq - ((drm_via_private_t *)dev->dev_private)->blit_queues);
DRM_DEBUG("Polling timer called for engine %d, jiffies %lu\n", engine,
(unsigned long) jiffies);
via_dmablit_handler(dev, engine, 0);
if (!timer_pending(&blitq->poll_timer)) {
blitq->poll_timer.expires = jiffies+1;
add_timer(&blitq->poll_timer);
/*
* Rerun handler to delete timer if engines are off, and
* to shorten abort latency. This is a little nasty.
*/
via_dmablit_handler(dev, engine, 0);
}
}
/*
* A timer that regularly polls the blit engine in cases where we don't have interrupts:
* a) Broken hardware (typically those that don't have any video capture facility).
* b) Blit abort. The hardware doesn't send an interrupt when a blit is aborted.
* The timer and hardware IRQ's can and do work in parallel. If the hardware has
* irqs, it will shorten the latency somewhat.
*/
static void
via_dmablit_timer(void *arg)
{
drm_via_blitq_t *blitq = (drm_via_blitq_t *)arg;
struct drm_device *dev = blitq->dev;
int engine = (int)
(blitq - ((drm_via_private_t *)dev->dev_private)->blit_queues);
DRM_DEBUG("Polling timer called for engine %d, jiffies %lu\n", engine,
(unsigned long) jiffies);
via_dmablit_handler(dev, engine, 0);
if (!callout_pending(&blitq->poll_timer)) {
callout_schedule(&blitq->poll_timer, 1);
/*
* Rerun handler to delete timer if engines are off, and
* to shorten abort latency. This is a little nasty.
*/
via_dmablit_handler(dev, engine, 0);
}
}
static void
via_dmablit_timer(unsigned long data)
{
drm_via_blitq_t *blitq = (drm_via_blitq_t *) data;
drm_device_t *dev = blitq->dev;
int engine = (int)
(blitq - ((drm_via_private_t *)dev->dev_private)->blit_queues);
DRM_DEBUG("Polling timer called for engine %d, jiffies %lu\n", engine,
(unsigned long) jiffies);
via_dmablit_handler(dev, engine, 0);
if (!timer_pending(&blitq->poll_timer)) {
blitq->poll_timer.expires = jiffies+1;
add_timer(&blitq->poll_timer);
}
via_dmablit_handler(dev, engine, 0);
}
static int
via_dmablit(drm_device_t *dev, drm_via_dmablit_t *xfer)
{
drm_via_private_t *dev_priv = (drm_via_private_t *)dev->dev_private;
drm_via_sg_info_t *vsg;
drm_via_blitq_t *blitq;
int ret;
int engine;
unsigned long irqsave;
if (dev_priv == NULL) {
DRM_ERROR("Called without initialization.\n");
return DRM_ERR(EINVAL);
}
engine = (xfer->to_fb) ? 0 : 1;
blitq = dev_priv->blit_queues + engine;
if (0 != (ret = via_dmablit_grab_slot(blitq, engine))) {
return ret;
}
if (NULL == (vsg = kmalloc(sizeof(*vsg), GFP_KERNEL))) {
via_dmablit_release_slot(blitq);
return DRM_ERR(ENOMEM);
}
if (0 != (ret = via_build_sg_info(dev, vsg, xfer))) {
via_dmablit_release_slot(blitq);
kfree(vsg);
return ret;
}
spin_lock_irqsave(&blitq->blit_lock, irqsave);
blitq->blits[blitq->head++] = vsg;
if (blitq->head >= VIA_NUM_BLIT_SLOTS)
blitq->head = 0;
blitq->num_outstanding++;
xfer->sync.sync_handle = ++blitq->cur_blit_handle;
spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
xfer->sync.engine = engine;
via_dmablit_handler(dev, engine, 0);
return 0;
}
/*
* Grab a free slot. Build blit info and queue a blit.
*/
static int
via_dmablit(struct drm_device *dev, drm_via_dmablit_t *xfer)
{
drm_via_private_t *dev_priv = (drm_via_private_t *)dev->dev_private;
drm_via_sg_info_t *vsg;
drm_via_blitq_t *blitq;
int ret;
int engine;
if (dev_priv == NULL) {
DRM_ERROR("Called without initialization.\n");
return -EINVAL;
}
engine = (xfer->to_fb) ? 0 : 1;
blitq = dev_priv->blit_queues + engine;
if (0 != (ret = via_dmablit_grab_slot(blitq, engine))) {
return ret;
}
if (NULL == (vsg = malloc(sizeof(*vsg), DRM_MEM_DRIVER,
M_NOWAIT | M_ZERO))) {
via_dmablit_release_slot(blitq);
return -ENOMEM;
}
if (0 != (ret = via_build_sg_info(dev, vsg, xfer))) {
via_dmablit_release_slot(blitq);
free(vsg, DRM_MEM_DRIVER);
return ret;
}
mtx_lock(&blitq->blit_lock);
blitq->blits[blitq->head++] = vsg;
if (blitq->head >= VIA_NUM_BLIT_SLOTS)
blitq->head = 0;
blitq->num_outstanding++;
xfer->sync.sync_handle = ++blitq->cur_blit_handle;
mtx_unlock(&blitq->blit_lock);
xfer->sync.engine = engine;
via_dmablit_handler(dev, engine, 0);
return 0;
}
