diff options
Diffstat (limited to 'arch/sparc64/kernel/iommu.c')
| -rw-r--r-- | arch/sparc64/kernel/iommu.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/sparc64/kernel/iommu.c b/arch/sparc64/kernel/iommu.c index b781d3d54fb..756fa24eeef 100644 --- a/arch/sparc64/kernel/iommu.c +++ b/arch/sparc64/kernel/iommu.c @@ -516,9 +516,11 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist, unsigned long flags, handle, prot, ctx; dma_addr_t dma_next = 0, dma_addr; unsigned int max_seg_size; + unsigned long seg_boundary_size; int outcount, incount, i; struct strbuf *strbuf; struct iommu *iommu; + unsigned long base_shift; BUG_ON(direction == DMA_NONE); @@ -549,8 +551,11 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist, outs->dma_length = 0; max_seg_size = dma_get_max_seg_size(dev); + seg_boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1, + IO_PAGE_SIZE) >> IO_PAGE_SHIFT; + base_shift = iommu->page_table_map_base >> IO_PAGE_SHIFT; for_each_sg(sglist, s, nelems, i) { - unsigned long paddr, npages, entry, slen; + unsigned long paddr, npages, entry, out_entry = 0, slen; iopte_t *base; slen = s->length; @@ -593,7 +598,9 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist, * - allocated dma_addr isn't contiguous to previous allocation */ if ((dma_addr != dma_next) || - (outs->dma_length + s->length > max_seg_size)) { + (outs->dma_length + s->length > max_seg_size) || + (is_span_boundary(out_entry, base_shift, + seg_boundary_size, outs, s))) { /* Can't merge: create a new segment */ segstart = s; outcount++; @@ -607,6 +614,7 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist, /* This is a new segment, fill entries */ outs->dma_address = dma_addr; outs->dma_length = slen; + out_entry = entry; } /* Calculate next page pointer for contiguous check */ |