diff options
Diffstat (limited to 'arch/sparc64/kernel/iommu_common.c')
| -rw-r--r-- | arch/sparc64/kernel/iommu_common.c | 51 |
1 files changed, 30 insertions, 21 deletions
diff --git a/arch/sparc64/kernel/iommu_common.c b/arch/sparc64/kernel/iommu_common.c index 12c93a3eee26..d7ca900ec51d 100644 --- a/arch/sparc64/kernel/iommu_common.c +++ b/arch/sparc64/kernel/iommu_common.c @@ -12,18 +12,22 @@ */ #ifdef VERIFY_SG -static int verify_lengths(struct scatterlist *sg, int nents, int npages) +static int verify_lengths(struct scatterlist *sglist, int nents, int npages) { int sg_len, dma_len; int i, pgcount; + struct scatterlist *sg; sg_len = 0; - for (i = 0; i < nents; i++) - sg_len += sg[i].length; + for_each_sg(sglist, sg, nents, i) + sg_len += sg->length; dma_len = 0; - for (i = 0; i < nents && sg[i].dma_length; i++) - dma_len += sg[i].dma_length; + for_each_sg(sglist, sg, nents, i) { + if (!sg->dma_length) + break; + dma_len += sg->dma_length; + } if (sg_len != dma_len) { printk("verify_lengths: Error, different, sg[%d] dma[%d]\n", @@ -32,13 +36,16 @@ static int verify_lengths(struct scatterlist *sg, int nents, int npages) } pgcount = 0; - for (i = 0; i < nents && sg[i].dma_length; i++) { + for_each_sg(sglist, sg, nents, i) { unsigned long start, end; - start = sg[i].dma_address; + if (!sg->dma_length) + break; + + start = sg->dma_address; start = start & IO_PAGE_MASK; - end = sg[i].dma_address + sg[i].dma_length; + end = sg->dma_address + sg->dma_length; end = (end + (IO_PAGE_SIZE - 1)) & IO_PAGE_MASK; pgcount += ((end - start) >> IO_PAGE_SHIFT); @@ -113,7 +120,7 @@ static int verify_one_map(struct scatterlist *dma_sg, struct scatterlist **__sg, if (dlen > 0 && ((daddr & ~IO_PAGE_MASK) == 0)) iopte++; - sg++; + sg = sg_next(sg); if (--nents <= 0) break; sgaddr = (unsigned long) (page_address(sg->page) + sg->offset); @@ -147,7 +154,7 @@ static int verify_maps(struct scatterlist *sg, int nents, iopte_t *iopte) nents = verify_one_map(dma_sg, &sg, nents, &iopte); if (nents <= 0) break; - dma_sg++; + dma_sg = sg_next(dma_sg); if (dma_sg->dma_length == 0) break; } @@ -169,22 +176,24 @@ static int verify_maps(struct scatterlist *sg, int nents, iopte_t *iopte) return 0; } -void verify_sglist(struct scatterlist *sg, int nents, iopte_t *iopte, int npages) +void verify_sglist(struct scatterlist *sglist, int nents, iopte_t *iopte, int npages) { - if (verify_lengths(sg, nents, npages) < 0 || - verify_maps(sg, nents, iopte) < 0) { + struct scatterlist *sg; + + if (verify_lengths(sglist, nents, npages) < 0 || + verify_maps(sglist, nents, iopte) < 0) { int i; printk("verify_sglist: Crap, messed up mappings, dumping, iodma at "); - printk("%016lx.\n", sg->dma_address & IO_PAGE_MASK); + printk("%016lx.\n", sglist->dma_address & IO_PAGE_MASK); - for (i = 0; i < nents; i++) { + for_each_sg(sglist, sg, nents, i) { printk("sg(%d): page_addr(%p) off(%x) length(%x) " - "dma_address[%016lx] dma_length[%016lx]\n", + "dma_address[%016x] dma_length[%016x]\n", i, - page_address(sg[i].page), sg[i].offset, - sg[i].length, - sg[i].dma_address, sg[i].dma_length); + page_address(sg->page), sg->offset, + sg->length, + sg->dma_address, sg->dma_length); } } @@ -205,12 +214,12 @@ unsigned long prepare_sg(struct scatterlist *sg, int nents) while (--nents) { unsigned long addr; - sg++; + sg = sg_next(sg); addr = (unsigned long) (page_address(sg->page) + sg->offset); if (! VCONTIG(prev, addr)) { dma_sg->dma_address = dent_addr; dma_sg->dma_length = dent_len; - dma_sg++; + dma_sg = sg_next(dma_sg); dent_addr = ((dent_addr + dent_len + |
