static int ispstat_bufs_alloc(struct ispstat *stat, u32 size)
{
unsigned long flags;
spin_lock_irqsave(&stat->isp->stat_lock, flags);
BUG_ON(stat->locked_buf != NULL);
/* Are the old buffers big enough? */
if (stat->buf_alloc_size >= size) {
spin_unlock_irqrestore(&stat->isp->stat_lock, flags);
return 0;
}
if (stat->state != ISPSTAT_DISABLED || stat->buf_processing) {
dev_info(stat->isp->dev,
"%s: trying to allocate memory when busy\n",
stat->subdev.name);
spin_unlock_irqrestore(&stat->isp->stat_lock, flags);
return -EBUSY;
}
spin_unlock_irqrestore(&stat->isp->stat_lock, flags);
ispstat_bufs_free(stat);
if (IS_COHERENT_BUF(stat))
return ispstat_bufs_alloc_dma(stat, size);
else
return ispstat_bufs_alloc_iommu(stat, size);
}
int ispstat_bufs_alloc(struct ispstat *stat,
unsigned int size, int dma_buf)
{
struct isp_device *isp = dev_get_drvdata(stat->dev);
unsigned long flags;
int ret = 0;
int i;
spin_lock_irqsave(&stat->lock, flags);
BUG_ON(stat->locked_buf != NULL);
dma_buf = dma_buf ? 1 : 0;
/* Are the old buffers big enough? */
if ((stat->buf_alloc_size >= size) && (stat->dma_buf == dma_buf)) {
for (i = 0; i < stat->nbufs; i++)
stat->buf[i].frame_number = stat->max_frame;
spin_unlock_irqrestore(&stat->lock, flags);
goto out;
}
if (isp->running != ISP_STOPPED) {
dev_info(stat->dev,
"%s stat: trying to configure when busy\n",
stat->tag);
spin_unlock_irqrestore(&stat->lock, flags);
return -EBUSY;
}
spin_unlock_irqrestore(&stat->lock, flags);
ispstat_bufs_free(stat);
if (dma_buf)
ret = ispstat_bufs_alloc_dma(stat, size);
else
ret = ispstat_bufs_alloc_iommu(stat, size);
if (ret)
size = 0;
out:
stat->buf_size = size;
stat->active_buf = NULL;
return ret;
}