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authorFUJITA Tomonori <tomof@acm.org>2008-02-04 22:28:14 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-05 09:44:12 -0800
commit59fc67dedb46c29442989e52af39da67aea52512 (patch)
treed75eb8ce840e1f9d2a2e2dd939e28396750186fb
parentd22a6966b8029913fac37d078ab2403898d94c63 (diff)
downloadlinux-59fc67dedb46c29442989e52af39da67aea52512.tar.bz2
iommu sg merging: PCI: add dma segment boundary support
This adds PCI's accessor for segment_boundary_mask in device_dma_parameters. The default segment_boundary is set to 0xffffffff, same to the block layer's default value (and the scsi mid layer uses the same value). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Greg KH <greg@kroah.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/pci/pci.c8
-rw-r--r--drivers/pci/probe.c1
-rw-r--r--include/linux/pci.h7
3 files changed, 16 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index be97090ddf32..ae3df46eaabf 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1459,6 +1459,14 @@ int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size)
EXPORT_SYMBOL(pci_set_dma_max_seg_size);
#endif
+#ifndef HAVE_ARCH_PCI_SET_DMA_SEGMENT_BOUNDARY
+int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask)
+{
+ return dma_set_seg_boundary(&dev->dev, mask);
+}
+EXPORT_SYMBOL(pci_set_dma_seg_boundary);
+#endif
+
/**
* pcix_get_max_mmrbc - get PCI-X maximum designed memory read byte count
* @dev: PCI device to query
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index f47d596d5ebc..4d23b9fb551b 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -937,6 +937,7 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
dev->dev.coherent_dma_mask = 0xffffffffull;
pci_set_dma_max_seg_size(dev, 65536);
+ pci_set_dma_seg_boundary(dev, 0xffffffff);
/* Fix up broken headers */
pci_fixup_device(pci_fixup_header, dev);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index ba3a7f459da4..7215d3b1f4af 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -583,6 +583,7 @@ void pci_msi_off(struct pci_dev *dev);
int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
+int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
int pcix_get_max_mmrbc(struct pci_dev *dev);
int pcix_get_mmrbc(struct pci_dev *dev);
int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
@@ -831,6 +832,12 @@ static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
return -EIO;
}
+static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
+ unsigned long mask)
+{
+ return -EIO;
+}
+
static inline int pci_assign_resource(struct pci_dev *dev, int i)
{
return -EBUSY;