forked from luck/tmp_suning_uos_patched
[SPARC64]: Temporarily remove IOMMU merging code.
Changeset fde6a3c82d ("iommu sg merging:
sparc64: make iommu respect the segment size limits") broke sparc64
because whilst it added the segment limiting code to the first pass of
SG mapping (in prepare_sg()) it did not add matching code to the
second pass handling (in fill_sg())
As a result the two passes disagree where the segment boundaries
should be, resulting in OOPSes, DMA corruption, and corrupted
superblocks.
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
David S. Miller
parent
b3ff81dd8a
commit
38192d52f1
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@ -11,7 +11,7 @@ obj-y := process.o setup.o cpu.o idprom.o \
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traps.o auxio.o una_asm.o sysfs.o iommu.o \
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irq.o ptrace.o time.o sys_sparc.o signal.o \
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unaligned.o central.o pci.o starfire.o semaphore.o \
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power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o \
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power.o sbus.o sparc64_ksyms.o chmc.o \
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visemul.o prom.o of_device.o hvapi.o sstate.o mdesc.o
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obj-$(CONFIG_STACKTRACE) += stacktrace.o
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@ -472,94 +472,15 @@ static void dma_4u_unmap_single(struct device *dev, dma_addr_t bus_addr,
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spin_unlock_irqrestore(&iommu->lock, flags);
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}
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#define SG_ENT_PHYS_ADDRESS(SG) (__pa(sg_virt((SG))))
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static void fill_sg(iopte_t *iopte, struct scatterlist *sg,
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int nused, int nelems,
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unsigned long iopte_protection)
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{
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struct scatterlist *dma_sg = sg;
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int i;
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for (i = 0; i < nused; i++) {
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unsigned long pteval = ~0UL;
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u32 dma_npages;
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dma_npages = ((dma_sg->dma_address & (IO_PAGE_SIZE - 1UL)) +
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dma_sg->dma_length +
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((IO_PAGE_SIZE - 1UL))) >> IO_PAGE_SHIFT;
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do {
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unsigned long offset;
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signed int len;
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/* If we are here, we know we have at least one
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* more page to map. So walk forward until we
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* hit a page crossing, and begin creating new
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* mappings from that spot.
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*/
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for (;;) {
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unsigned long tmp;
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tmp = SG_ENT_PHYS_ADDRESS(sg);
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len = sg->length;
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if (((tmp ^ pteval) >> IO_PAGE_SHIFT) != 0UL) {
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pteval = tmp & IO_PAGE_MASK;
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offset = tmp & (IO_PAGE_SIZE - 1UL);
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break;
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}
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if (((tmp ^ (tmp + len - 1UL)) >> IO_PAGE_SHIFT) != 0UL) {
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pteval = (tmp + IO_PAGE_SIZE) & IO_PAGE_MASK;
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offset = 0UL;
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len -= (IO_PAGE_SIZE - (tmp & (IO_PAGE_SIZE - 1UL)));
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break;
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}
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sg = sg_next(sg);
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nelems--;
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}
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pteval = iopte_protection | (pteval & IOPTE_PAGE);
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while (len > 0) {
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*iopte++ = __iopte(pteval);
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pteval += IO_PAGE_SIZE;
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len -= (IO_PAGE_SIZE - offset);
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offset = 0;
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dma_npages--;
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}
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pteval = (pteval & IOPTE_PAGE) + len;
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sg = sg_next(sg);
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nelems--;
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/* Skip over any tail mappings we've fully mapped,
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* adjusting pteval along the way. Stop when we
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* detect a page crossing event.
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*/
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while (nelems &&
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(pteval << (64 - IO_PAGE_SHIFT)) != 0UL &&
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(pteval == SG_ENT_PHYS_ADDRESS(sg)) &&
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((pteval ^
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(SG_ENT_PHYS_ADDRESS(sg) + sg->length - 1UL)) >> IO_PAGE_SHIFT) == 0UL) {
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pteval += sg->length;
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sg = sg_next(sg);
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nelems--;
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}
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if ((pteval << (64 - IO_PAGE_SHIFT)) == 0UL)
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pteval = ~0UL;
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} while (dma_npages != 0);
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dma_sg = sg_next(dma_sg);
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}
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}
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static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
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int nelems, enum dma_data_direction direction)
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{
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struct iommu *iommu;
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unsigned long flags, ctx, i, npages, iopte_protection;
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struct scatterlist *sg;
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struct strbuf *strbuf;
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unsigned long flags, ctx, npages, iopte_protection;
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struct iommu *iommu;
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iopte_t *base;
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u32 dma_base;
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struct scatterlist *sgtmp;
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int used;
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/* Fast path single entry scatterlists. */
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if (nelems == 1) {
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@ -578,11 +499,7 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
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if (unlikely(direction == DMA_NONE))
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goto bad_no_ctx;
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/* Step 1: Prepare scatter list. */
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npages = prepare_sg(dev, sglist, nelems);
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/* Step 2: Allocate a cluster and context, if necessary. */
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npages = calc_npages(sglist, nelems);
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spin_lock_irqsave(&iommu->lock, flags);
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@ -599,18 +516,6 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
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dma_base = iommu->page_table_map_base +
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((base - iommu->page_table) << IO_PAGE_SHIFT);
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/* Step 3: Normalize DMA addresses. */
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used = nelems;
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sgtmp = sglist;
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while (used && sgtmp->dma_length) {
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sgtmp->dma_address += dma_base;
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sgtmp = sg_next(sgtmp);
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used--;
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}
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used = nelems - used;
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/* Step 4: Create the mappings. */
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if (strbuf->strbuf_enabled)
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iopte_protection = IOPTE_STREAMING(ctx);
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else
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@ -618,13 +523,27 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
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if (direction != DMA_TO_DEVICE)
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iopte_protection |= IOPTE_WRITE;
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fill_sg(base, sglist, used, nelems, iopte_protection);
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for_each_sg(sglist, sg, nelems, i) {
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unsigned long paddr = SG_ENT_PHYS_ADDRESS(sg);
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unsigned long slen = sg->length;
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unsigned long this_npages;
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#ifdef VERIFY_SG
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verify_sglist(sglist, nelems, base, npages);
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#endif
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this_npages = iommu_num_pages(paddr, slen);
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return used;
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sg->dma_address = dma_base | (paddr & ~IO_PAGE_MASK);
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sg->dma_length = slen;
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paddr &= IO_PAGE_MASK;
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while (this_npages--) {
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iopte_val(*base) = iopte_protection | paddr;
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base++;
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paddr += IO_PAGE_SIZE;
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dma_base += IO_PAGE_SIZE;
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}
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}
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return nelems;
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bad:
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iommu_free_ctx(iommu, ctx);
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@ -637,11 +556,10 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
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static void dma_4u_unmap_sg(struct device *dev, struct scatterlist *sglist,
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int nelems, enum dma_data_direction direction)
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{
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struct iommu *iommu;
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struct strbuf *strbuf;
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iopte_t *base;
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unsigned long flags, ctx, i, npages;
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struct scatterlist *sg, *sgprv;
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struct strbuf *strbuf;
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struct iommu *iommu;
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iopte_t *base;
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u32 bus_addr;
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if (unlikely(direction == DMA_NONE)) {
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@ -654,15 +572,7 @@ static void dma_4u_unmap_sg(struct device *dev, struct scatterlist *sglist,
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bus_addr = sglist->dma_address & IO_PAGE_MASK;
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sgprv = NULL;
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for_each_sg(sglist, sg, nelems, i) {
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if (sg->dma_length == 0)
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break;
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sgprv = sg;
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}
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npages = (IO_PAGE_ALIGN(sgprv->dma_address + sgprv->dma_length) -
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bus_addr) >> IO_PAGE_SHIFT;
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npages = calc_npages(sglist, nelems);
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base = iommu->page_table +
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((bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT);
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@ -1,248 +0,0 @@
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/* $Id: iommu_common.c,v 1.9 2001/12/17 07:05:09 davem Exp $
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* iommu_common.c: UltraSparc SBUS/PCI common iommu code.
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*
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* Copyright (C) 1999 David S. Miller (davem@redhat.com)
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*/
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#include <linux/dma-mapping.h>
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#include "iommu_common.h"
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/* You are _strongly_ advised to enable the following debugging code
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* any time you make changes to the sg code below, run it for a while
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* with filesystems mounted read-only before buying the farm... -DaveM
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*/
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#ifdef VERIFY_SG
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static int verify_lengths(struct scatterlist *sglist, int nents, int npages)
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{
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int sg_len, dma_len;
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int i, pgcount;
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struct scatterlist *sg;
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sg_len = 0;
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for_each_sg(sglist, sg, nents, i)
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sg_len += sg->length;
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dma_len = 0;
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for_each_sg(sglist, sg, nents, i) {
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if (!sg->dma_length)
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break;
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dma_len += sg->dma_length;
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}
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if (sg_len != dma_len) {
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printk("verify_lengths: Error, different, sg[%d] dma[%d]\n",
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sg_len, dma_len);
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return -1;
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}
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pgcount = 0;
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for_each_sg(sglist, sg, nents, i) {
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unsigned long start, end;
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if (!sg->dma_length)
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break;
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start = sg->dma_address;
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start = start & IO_PAGE_MASK;
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end = sg->dma_address + sg->dma_length;
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end = (end + (IO_PAGE_SIZE - 1)) & IO_PAGE_MASK;
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pgcount += ((end - start) >> IO_PAGE_SHIFT);
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}
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if (pgcount != npages) {
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printk("verify_lengths: Error, page count wrong, "
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"npages[%d] pgcount[%d]\n",
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npages, pgcount);
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return -1;
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}
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/* This test passes... */
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return 0;
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}
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static int verify_one_map(struct scatterlist *dma_sg, struct scatterlist **__sg, int nents, iopte_t **__iopte)
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{
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struct scatterlist *sg = *__sg;
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iopte_t *iopte = *__iopte;
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u32 dlen = dma_sg->dma_length;
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u32 daddr;
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unsigned int sglen;
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unsigned long sgaddr;
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daddr = dma_sg->dma_address;
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sglen = sg->length;
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sgaddr = (unsigned long) sg_virt(sg);
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while (dlen > 0) {
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unsigned long paddr;
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/* SG and DMA_SG must begin at the same sub-page boundary. */
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if ((sgaddr & ~IO_PAGE_MASK) != (daddr & ~IO_PAGE_MASK)) {
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printk("verify_one_map: Wrong start offset "
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"sg[%08lx] dma[%08x]\n",
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sgaddr, daddr);
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nents = -1;
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goto out;
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}
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/* Verify the IOPTE points to the right page. */
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paddr = iopte_val(*iopte) & IOPTE_PAGE;
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if ((paddr + PAGE_OFFSET) != (sgaddr & IO_PAGE_MASK)) {
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printk("verify_one_map: IOPTE[%08lx] maps the "
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"wrong page, should be [%08lx]\n",
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iopte_val(*iopte), (sgaddr & IO_PAGE_MASK) - PAGE_OFFSET);
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nents = -1;
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goto out;
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}
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/* If this SG crosses a page, adjust to that next page
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* boundary and loop.
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*/
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if ((sgaddr & IO_PAGE_MASK) ^ ((sgaddr + sglen - 1) & IO_PAGE_MASK)) {
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unsigned long next_page, diff;
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next_page = (sgaddr + IO_PAGE_SIZE) & IO_PAGE_MASK;
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diff = next_page - sgaddr;
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sgaddr += diff;
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daddr += diff;
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sglen -= diff;
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dlen -= diff;
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if (dlen > 0)
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iopte++;
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continue;
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}
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/* SG wholly consumed within this page. */
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daddr += sglen;
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dlen -= sglen;
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if (dlen > 0 && ((daddr & ~IO_PAGE_MASK) == 0))
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iopte++;
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sg = sg_next(sg);
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if (--nents <= 0)
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break;
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sgaddr = (unsigned long) sg_virt(sg);
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sglen = sg->length;
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}
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if (dlen < 0) {
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/* Transfer overrun, big problems. */
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printk("verify_one_map: Transfer overrun by %d bytes.\n",
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-dlen);
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nents = -1;
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} else {
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/* Advance to next dma_sg implies that the next iopte will
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* begin it.
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*/
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iopte++;
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}
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out:
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*__sg = sg;
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*__iopte = iopte;
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return nents;
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}
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static int verify_maps(struct scatterlist *sg, int nents, iopte_t *iopte)
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{
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struct scatterlist *dma_sg = sg;
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struct scatterlist *orig_dma_sg = dma_sg;
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int orig_nents = nents;
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for (;;) {
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nents = verify_one_map(dma_sg, &sg, nents, &iopte);
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if (nents <= 0)
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break;
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dma_sg = sg_next(dma_sg);
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if (dma_sg->dma_length == 0)
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break;
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}
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if (nents > 0) {
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printk("verify_maps: dma maps consumed by some sgs remain (%d)\n",
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nents);
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return -1;
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}
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if (nents < 0) {
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printk("verify_maps: Error, messed up mappings, "
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"at sg %d dma_sg %d\n",
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(int) (orig_nents + nents), (int) (dma_sg - orig_dma_sg));
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return -1;
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}
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/* This test passes... */
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return 0;
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}
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void verify_sglist(struct scatterlist *sglist, int nents, iopte_t *iopte, int npages)
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{
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struct scatterlist *sg;
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if (verify_lengths(sglist, nents, npages) < 0 ||
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verify_maps(sglist, nents, iopte) < 0) {
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int i;
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printk("verify_sglist: Crap, messed up mappings, dumping, iodma at ");
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printk("%016lx.\n", sglist->dma_address & IO_PAGE_MASK);
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for_each_sg(sglist, sg, nents, i) {
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printk("sg(%d): page_addr(%p) off(%x) length(%x) "
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"dma_address[%016x] dma_length[%016x]\n",
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i,
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page_address(sg_page(sg)), sg->offset,
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sg->length,
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sg->dma_address, sg->dma_length);
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}
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}
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/* Seems to be ok */
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}
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#endif
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unsigned long prepare_sg(struct device *dev, struct scatterlist *sg, int nents)
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{
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struct scatterlist *dma_sg = sg;
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unsigned long prev;
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u32 dent_addr, dent_len;
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unsigned int max_seg_size;
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prev = (unsigned long) sg_virt(sg);
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prev += (unsigned long) (dent_len = sg->length);
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dent_addr = (u32) ((unsigned long)(sg_virt(sg)) & (IO_PAGE_SIZE - 1UL));
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max_seg_size = dma_get_max_seg_size(dev);
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while (--nents) {
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unsigned long addr;
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sg = sg_next(sg);
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addr = (unsigned long) sg_virt(sg);
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if (! VCONTIG(prev, addr) ||
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dent_len + sg->length > max_seg_size) {
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dma_sg->dma_address = dent_addr;
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dma_sg->dma_length = dent_len;
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dma_sg = sg_next(dma_sg);
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dent_addr = ((dent_addr +
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dent_len +
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(IO_PAGE_SIZE - 1UL)) >> IO_PAGE_SHIFT);
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dent_addr <<= IO_PAGE_SHIFT;
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dent_addr += addr & (IO_PAGE_SIZE - 1UL);
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dent_len = 0;
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}
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dent_len += sg->length;
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prev = addr + sg->length;
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}
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dma_sg->dma_address = dent_addr;
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dma_sg->dma_length = dent_len;
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if (dma_sg != sg) {
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dma_sg = sg_next(dma_sg);
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dma_sg->dma_length = 0;
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}
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return ((unsigned long) dent_addr +
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(unsigned long) dent_len +
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(IO_PAGE_SIZE - 1UL)) >> IO_PAGE_SHIFT;
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}
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@ -30,6 +30,32 @@
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*/
|
||||
#define IOMMU_PAGE_SHIFT 13
|
||||
|
||||
#define SG_ENT_PHYS_ADDRESS(SG) (__pa(sg_virt((SG))))
|
||||
|
||||
static inline unsigned long iommu_num_pages(unsigned long vaddr,
|
||||
unsigned long slen)
|
||||
{
|
||||
unsigned long npages;
|
||||
|
||||
npages = IO_PAGE_ALIGN(vaddr + slen) - (vaddr & IO_PAGE_MASK);
|
||||
npages >>= IO_PAGE_SHIFT;
|
||||
|
||||
return npages;
|
||||
}
|
||||
|
||||
static inline unsigned long calc_npages(struct scatterlist *sglist, int nelems)
|
||||
{
|
||||
unsigned long i, npages = 0;
|
||||
struct scatterlist *sg;
|
||||
|
||||
for_each_sg(sglist, sg, nelems, i) {
|
||||
unsigned long paddr = SG_ENT_PHYS_ADDRESS(sg);
|
||||
npages += iommu_num_pages(paddr, sg->length);
|
||||
}
|
||||
|
||||
return npages;
|
||||
}
|
||||
|
||||
/* You are _strongly_ advised to enable the following debugging code
|
||||
* any time you make changes to the sg code below, run it for a while
|
||||
* with filesystems mounted read-only before buying the farm... -DaveM
|
||||
|
|
|
|||
|
|
@ -365,113 +365,14 @@ static void dma_4v_unmap_single(struct device *dev, dma_addr_t bus_addr,
|
|||
spin_unlock_irqrestore(&iommu->lock, flags);
|
||||
}
|
||||
|
||||
#define SG_ENT_PHYS_ADDRESS(SG) (__pa(sg_virt((SG))))
|
||||
|
||||
static long fill_sg(long entry, struct device *dev,
|
||||
struct scatterlist *sg,
|
||||
int nused, int nelems, unsigned long prot)
|
||||
{
|
||||
struct scatterlist *dma_sg = sg;
|
||||
unsigned long flags;
|
||||
int i;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
iommu_batch_start(dev, prot, entry);
|
||||
|
||||
for (i = 0; i < nused; i++) {
|
||||
unsigned long pteval = ~0UL;
|
||||
u32 dma_npages;
|
||||
|
||||
dma_npages = ((dma_sg->dma_address & (IO_PAGE_SIZE - 1UL)) +
|
||||
dma_sg->dma_length +
|
||||
((IO_PAGE_SIZE - 1UL))) >> IO_PAGE_SHIFT;
|
||||
do {
|
||||
unsigned long offset;
|
||||
signed int len;
|
||||
|
||||
/* If we are here, we know we have at least one
|
||||
* more page to map. So walk forward until we
|
||||
* hit a page crossing, and begin creating new
|
||||
* mappings from that spot.
|
||||
*/
|
||||
for (;;) {
|
||||
unsigned long tmp;
|
||||
|
||||
tmp = SG_ENT_PHYS_ADDRESS(sg);
|
||||
len = sg->length;
|
||||
if (((tmp ^ pteval) >> IO_PAGE_SHIFT) != 0UL) {
|
||||
pteval = tmp & IO_PAGE_MASK;
|
||||
offset = tmp & (IO_PAGE_SIZE - 1UL);
|
||||
break;
|
||||
}
|
||||
if (((tmp ^ (tmp + len - 1UL)) >> IO_PAGE_SHIFT) != 0UL) {
|
||||
pteval = (tmp + IO_PAGE_SIZE) & IO_PAGE_MASK;
|
||||
offset = 0UL;
|
||||
len -= (IO_PAGE_SIZE - (tmp & (IO_PAGE_SIZE - 1UL)));
|
||||
break;
|
||||
}
|
||||
sg = sg_next(sg);
|
||||
nelems--;
|
||||
}
|
||||
|
||||
pteval = (pteval & IOPTE_PAGE);
|
||||
while (len > 0) {
|
||||
long err;
|
||||
|
||||
err = iommu_batch_add(pteval);
|
||||
if (unlikely(err < 0L))
|
||||
goto iommu_map_failed;
|
||||
|
||||
pteval += IO_PAGE_SIZE;
|
||||
len -= (IO_PAGE_SIZE - offset);
|
||||
offset = 0;
|
||||
dma_npages--;
|
||||
}
|
||||
|
||||
pteval = (pteval & IOPTE_PAGE) + len;
|
||||
sg = sg_next(sg);
|
||||
nelems--;
|
||||
|
||||
/* Skip over any tail mappings we've fully mapped,
|
||||
* adjusting pteval along the way. Stop when we
|
||||
* detect a page crossing event.
|
||||
*/
|
||||
while (nelems &&
|
||||
(pteval << (64 - IO_PAGE_SHIFT)) != 0UL &&
|
||||
(pteval == SG_ENT_PHYS_ADDRESS(sg)) &&
|
||||
((pteval ^
|
||||
(SG_ENT_PHYS_ADDRESS(sg) + sg->length - 1UL)) >> IO_PAGE_SHIFT) == 0UL) {
|
||||
pteval += sg->length;
|
||||
sg = sg_next(sg);
|
||||
nelems--;
|
||||
}
|
||||
if ((pteval << (64 - IO_PAGE_SHIFT)) == 0UL)
|
||||
pteval = ~0UL;
|
||||
} while (dma_npages != 0);
|
||||
dma_sg = sg_next(dma_sg);
|
||||
}
|
||||
|
||||
if (unlikely(iommu_batch_end() < 0L))
|
||||
goto iommu_map_failed;
|
||||
|
||||
local_irq_restore(flags);
|
||||
return 0;
|
||||
|
||||
iommu_map_failed:
|
||||
local_irq_restore(flags);
|
||||
return -1L;
|
||||
}
|
||||
|
||||
static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
|
||||
int nelems, enum dma_data_direction direction)
|
||||
{
|
||||
unsigned long flags, npages, i, prot;
|
||||
struct scatterlist *sg;
|
||||
struct iommu *iommu;
|
||||
unsigned long flags, npages, prot;
|
||||
u32 dma_base;
|
||||
struct scatterlist *sgtmp;
|
||||
long entry, err;
|
||||
int used;
|
||||
u32 dma_base;
|
||||
|
||||
/* Fast path single entry scatterlists. */
|
||||
if (nelems == 1) {
|
||||
|
|
@ -489,10 +390,8 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
|
|||
if (unlikely(direction == DMA_NONE))
|
||||
goto bad;
|
||||
|
||||
/* Step 1: Prepare scatter list. */
|
||||
npages = prepare_sg(dev, sglist, nelems);
|
||||
npages = calc_npages(sglist, nelems);
|
||||
|
||||
/* Step 2: Allocate a cluster and context, if necessary. */
|
||||
spin_lock_irqsave(&iommu->lock, flags);
|
||||
entry = arena_alloc(&iommu->arena, npages);
|
||||
spin_unlock_irqrestore(&iommu->lock, flags);
|
||||
|
|
@ -503,27 +402,45 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
|
|||
dma_base = iommu->page_table_map_base +
|
||||
(entry << IO_PAGE_SHIFT);
|
||||
|
||||
/* Step 3: Normalize DMA addresses. */
|
||||
used = nelems;
|
||||
|
||||
sgtmp = sglist;
|
||||
while (used && sgtmp->dma_length) {
|
||||
sgtmp->dma_address += dma_base;
|
||||
sgtmp = sg_next(sgtmp);
|
||||
used--;
|
||||
}
|
||||
used = nelems - used;
|
||||
|
||||
/* Step 4: Create the mappings. */
|
||||
prot = HV_PCI_MAP_ATTR_READ;
|
||||
if (direction != DMA_TO_DEVICE)
|
||||
prot |= HV_PCI_MAP_ATTR_WRITE;
|
||||
|
||||
err = fill_sg(entry, dev, sglist, used, nelems, prot);
|
||||
local_irq_save(flags);
|
||||
|
||||
iommu_batch_start(dev, prot, entry);
|
||||
|
||||
for_each_sg(sglist, sg, nelems, i) {
|
||||
unsigned long paddr = SG_ENT_PHYS_ADDRESS(sg);
|
||||
unsigned long slen = sg->length;
|
||||
unsigned long this_npages;
|
||||
|
||||
this_npages = iommu_num_pages(paddr, slen);
|
||||
|
||||
sg->dma_address = dma_base | (paddr & ~IO_PAGE_MASK);
|
||||
sg->dma_length = slen;
|
||||
|
||||
paddr &= IO_PAGE_MASK;
|
||||
while (this_npages--) {
|
||||
err = iommu_batch_add(paddr);
|
||||
if (unlikely(err < 0L)) {
|
||||
local_irq_restore(flags);
|
||||
goto iommu_map_failed;
|
||||
}
|
||||
|
||||
paddr += IO_PAGE_SIZE;
|
||||
dma_base += IO_PAGE_SIZE;
|
||||
}
|
||||
}
|
||||
|
||||
err = iommu_batch_end();
|
||||
|
||||
local_irq_restore(flags);
|
||||
|
||||
if (unlikely(err < 0L))
|
||||
goto iommu_map_failed;
|
||||
|
||||
return used;
|
||||
return nelems;
|
||||
|
||||
bad:
|
||||
if (printk_ratelimit())
|
||||
|
|
@ -541,12 +458,11 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
|
|||
static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist,
|
||||
int nelems, enum dma_data_direction direction)
|
||||
{
|
||||
unsigned long flags, npages;
|
||||
struct pci_pbm_info *pbm;
|
||||
struct iommu *iommu;
|
||||
unsigned long flags, i, npages;
|
||||
struct scatterlist *sg, *sgprv;
|
||||
long entry;
|
||||
u32 devhandle, bus_addr;
|
||||
struct iommu *iommu;
|
||||
long entry;
|
||||
|
||||
if (unlikely(direction == DMA_NONE)) {
|
||||
if (printk_ratelimit())
|
||||
|
|
@ -558,16 +474,8 @@ static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist,
|
|||
devhandle = pbm->devhandle;
|
||||
|
||||
bus_addr = sglist->dma_address & IO_PAGE_MASK;
|
||||
sgprv = NULL;
|
||||
for_each_sg(sglist, sg, nelems, i) {
|
||||
if (sg->dma_length == 0)
|
||||
break;
|
||||
|
||||
sgprv = sg;
|
||||
}
|
||||
|
||||
npages = (IO_PAGE_ALIGN(sgprv->dma_address + sgprv->dma_length) -
|
||||
bus_addr) >> IO_PAGE_SHIFT;
|
||||
npages = calc_npages(sglist, nelems);
|
||||
|
||||
entry = ((bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT);
|
||||
|
||||
|
|
|
|||
|
|
@ -16,7 +16,7 @@
|
|||
/* BIO layer definitions. */
|
||||
extern unsigned long kern_base, kern_size;
|
||||
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
|
||||
#define BIO_VMERGE_BOUNDARY 8192
|
||||
#define BIO_VMERGE_BOUNDARY 0
|
||||
|
||||
static inline u8 _inb(unsigned long addr)
|
||||
{
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user