summaryrefslogtreecommitdiff
path: root/linux-core
diff options
context:
space:
mode:
Diffstat (limited to 'linux-core')
-rw-r--r--linux-core/via_dmablit.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/linux-core/via_dmablit.c b/linux-core/via_dmablit.c
index b6e3e4f5..6e04cb57 100644
--- a/linux-core/via_dmablit.c
+++ b/linux-core/via_dmablit.c
@@ -74,7 +74,7 @@ via_unmap_blit_from_device(struct pci_dev *pdev, drm_via_sg_info_t *vsg)
desc_ptr = vsg->desc_pages[cur_descriptor_page] +
descriptor_this_page;
}
- dma_unmap_single(&pdev->dev, next, sizeof(*desc_ptr), DMA_FROM_DEVICE);
+ dma_unmap_single(&pdev->dev, next, sizeof(*desc_ptr), DMA_TO_DEVICE);
dma_unmap_page(&pdev->dev, desc_ptr->mem_addr, desc_ptr->size, vsg->direction);
next = (dma_addr_t) desc_ptr->next;
desc_ptr--;
@@ -595,11 +595,17 @@ via_build_sg_info(drm_device_t *dev, drm_via_sg_info_t *vsg, drm_via_dmablit_t *
* (Not a big limitation anyway.)
*/
- if ((xfer->mem_stride - xfer->line_length) >= PAGE_SIZE) {
+ if (((xfer->mem_stride - xfer->line_length) >= PAGE_SIZE) ||
+ (xfer->mem_stride > 2048)) {
DRM_ERROR("Too large system memory stride.\n");
return DRM_ERR(EINVAL);
}
+ if (xfer->num_lines > 2048) {
+ DRM_ERROR("Too many PCI DMA bitblt lines.\n");
+ return DRM_ERR(EINVAL);
+ }
+
/*
* we allow a negative fb stride to allow flipping of images in
* transfer.
@@ -617,11 +623,18 @@ via_build_sg_info(drm_device_t *dev, drm_via_sg_info_t *vsg, drm_via_dmablit_t *
* about this. Meanwhile, impose the following restrictions:
*/
+#ifdef VIA_BUGFREE
if ((((unsigned long)xfer->mem_addr & 3) != ((unsigned long)xfer->fb_addr & 3)) ||
((xfer->mem_stride & 3) != (xfer->fb_stride & 3))) {
DRM_ERROR("Invalid DRM bitblt alignment.\n");
return DRM_ERR(EINVAL);
}
+#else
+ if ((((unsigned long)xfer->mem_addr & 15) || ((unsigned long)xfer->fb_addr & 15))) {
+ DRM_ERROR("Invalid DRM bitblt alignment.\n");
+ return DRM_ERR(EINVAL);
+ }
+#endif
if (0 != (ret = via_lock_all_dma_pages(vsg, xfer))) {
DRM_ERROR("Could not lock DMA pages.\n");