diff options
Diffstat (limited to 'drivers/parisc/iommu-helpers.h')
| -rw-r--r-- | drivers/parisc/iommu-helpers.h | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/parisc/iommu-helpers.h b/drivers/parisc/iommu-helpers.h index 38d9e1aba1d..8c33491b21f 100644 --- a/drivers/parisc/iommu-helpers.h +++ b/drivers/parisc/iommu-helpers.h @@ -1,3 +1,5 @@ +#include <linux/prefetch.h> + /** * iommu_fill_pdir - Insert coalesced scatter/gather chunks into the I/O Pdir. * @ioc: The I/O Controller. @@ -95,12 +97,14 @@ iommu_fill_pdir(struct ioc *ioc, struct scatterlist *startsg, int nents, */ static inline unsigned int -iommu_coalesce_chunks(struct ioc *ioc, struct scatterlist *startsg, int nents, - int (*iommu_alloc_range)(struct ioc *, size_t)) +iommu_coalesce_chunks(struct ioc *ioc, struct device *dev, + struct scatterlist *startsg, int nents, + int (*iommu_alloc_range)(struct ioc *, struct device *, size_t)) { struct scatterlist *contig_sg; /* contig chunk head */ unsigned long dma_offset, dma_len; /* start/len of DMA stream */ unsigned int n_mappings = 0; + unsigned int max_seg_size = dma_get_max_seg_size(dev); while (nents > 0) { @@ -138,10 +142,13 @@ iommu_coalesce_chunks(struct ioc *ioc, struct scatterlist *startsg, int nents, ** exceed DMA_CHUNK_SIZE if we coalesce the ** next entry. */ - if(unlikely(ROUNDUP(dma_len + dma_offset + startsg->length, + if(unlikely(ALIGN(dma_len + dma_offset + startsg->length, IOVP_SIZE) > DMA_CHUNK_SIZE)) break; + if (startsg->length + dma_len > max_seg_size) + break; + /* ** Next see if we can append the next chunk (i.e. ** it must end on one page and begin on another @@ -158,10 +165,10 @@ iommu_coalesce_chunks(struct ioc *ioc, struct scatterlist *startsg, int nents, ** Allocate space for DMA stream. */ sg_dma_len(contig_sg) = dma_len; - dma_len = ROUNDUP(dma_len + dma_offset, IOVP_SIZE); + dma_len = ALIGN(dma_len + dma_offset, IOVP_SIZE); sg_dma_address(contig_sg) = PIDE_FLAG - | (iommu_alloc_range(ioc, dma_len) << IOVP_SHIFT) + | (iommu_alloc_range(ioc, dev, dma_len) << IOVP_SHIFT) | dma_offset; n_mappings++; } |