C++ (Cpp) sg_page_iter_page Examples

Example #1

File: i915_gem_dmabuf.c Project: vmayoral/ubuntu-vivid

static void *i915_gem_dmabuf_vmap(struct dma_buf *dma_buf)
{
	struct drm_i915_gem_object *obj = dma_buf_to_obj(dma_buf);
	struct drm_device *dev = obj->base.dev;
	struct sg_page_iter sg_iter;
	struct page **pages;
	int ret, i;

	ret = i915_mutex_lock_interruptible(dev);
	if (ret)
		return ERR_PTR(ret);

	if (obj->dma_buf_vmapping) {
		obj->vmapping_count++;
		goto out_unlock;
	}

	ret = i915_gem_object_get_pages(obj);
	if (ret)
		goto err;

	i915_gem_object_pin_pages(obj);

	ret = -ENOMEM;

	pages = drm_malloc_ab(obj->base.size >> PAGE_SHIFT, sizeof(*pages));
	if (pages == NULL)
		goto err_unpin;

	i = 0;
	for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, 0)
		pages[i++] = sg_page_iter_page(&sg_iter);

	obj->dma_buf_vmapping = vmap(pages, i, 0, PAGE_KERNEL);
	drm_free_large(pages);

	if (!obj->dma_buf_vmapping)
		goto err_unpin;

	obj->vmapping_count = 1;
out_unlock:
	mutex_unlock(&dev->struct_mutex);
	return obj->dma_buf_vmapping;

err_unpin:
	i915_gem_object_unpin_pages(obj);
err:
	mutex_unlock(&dev->struct_mutex);
	return ERR_PTR(ret);
}

Example #2

File: drm_cache.c Project: seyko2/openvz_rhel6_kernel_mirror

void
drm_clflush_sg(struct sg_table *st)
{
#if defined(CONFIG_X86)
	if (cpu_has_clflush) {
		struct sg_page_iter sg_iter;

		mb();
		for_each_sg_page(st->sgl, &sg_iter, st->nents, 0)
			drm_clflush_page(sg_page_iter_page(&sg_iter));
		mb();

		return;
	}

	if (on_each_cpu(drm_clflush_ipi_handler, NULL, 1) != 0)
		printk(KERN_ERR "Timed out waiting for cache flush.\n");
#else
	printk(KERN_ERR "Architecture has no drm_cache.c support\n");
	WARN_ON_ONCE(1);
#endif
}

Example #3

File: vmwgfx_ttm_buffer.c Project: AlexShiLucky/linux

static struct page *__vmw_piter_sg_page(struct vmw_piter *viter)
{
	return sg_page_iter_page(&viter->iter);
}