On Tue, 30 Aug 2011 22:41:46 -0400
Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:
> . instead of checking against the DMA_ERROR_CODE value which is
> per-platform specific. The zero value is a known invalid value
> that the TTM layer sets on the dma_address array if it is not
> used (ttm_tt_alloc_page_directory calls drm_calloc_large which
> creates a page with GFP_ZERO).
>
> We can't use pci_dma_mapping_error as that is IOMMU
> specific (some check for a specific physical address, some
> for ranges, some just do a check against zero).
>
> Also update the comments in the header about the true state
> of that parameter.
>
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> ---
> drivers/gpu/drm/nouveau/nouveau_sgdma.c | 3 +--
> drivers/gpu/drm/radeon/radeon_gart.c | 4 +---
> include/drm/ttm/ttm_page_alloc.h | 4 ++--
> 3 files changed, 4 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/nouveau/nouveau_sgdma.c
> b/drivers/gpu/drm/nouveau/nouveau_sgdma.c index 82fad91..624e2db
> 100644 --- a/drivers/gpu/drm/nouveau/nouveau_sgdma.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
> @@ -42,8 +42,7 @@ nouveau_sgdma_populate(struct ttm_backend *be,
> unsigned long num_pages,
> nvbe->nr_pages = 0;
> while (num_pages--) {
> - /* this code path isn't called and is incorrect
> anyways */
> - if (0) { /*dma_addrs[nvbe->nr_pages] !=
> DMA_ERROR_CODE)*/
> + if (dev->pdev, dma_addrs[nvbe->nr_pages] != 0) {
This is weird, do you mean && instead of a comma, or what?
Or am I completely missing the comma operator semantics?
> nvbe->pages[nvbe->nr_pages] =
> dma_addrs[nvbe->nr_pages];
> nvbe->ttm_alloced[nvbe->nr_pages] =
> true; diff --git a/drivers/gpu/drm/radeon/radeon_gart.c
> b/drivers/gpu/drm/radeon/radeon_gart.c index a533f52..41f7e51
> 100644 --- a/drivers/gpu/drm/radeon/radeon_gart.c
> +++ b/drivers/gpu/drm/radeon/radeon_gart.c
> @@ -181,9 +181,7 @@ int radeon_gart_bind(struct radeon_device
> *rdev, unsigned offset, p = t / (PAGE_SIZE /
> RADEON_GPU_PAGE_SIZE);
> for (i = 0; i < pages; i++, p++) {
> - /* we reverted the patch using dma_addr in TTM
> for now but this
> - * code stops building on alpha so just comment
> it out for now */
> - if (0) { /*dma_addr[i] != DMA_ERROR_CODE) */
> + if (rdev->pdev, dma_addr[i] != 0) {
The same question for this condition.
--
Pekka Paalanen
http://www.iki.fi/pq/
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