From 59fc67dedb46c29442989e52af39da67aea52512 Mon Sep 17 00:00:00 2001 From: FUJITA Tomonori Date: Mon, 4 Feb 2008 22:28:14 -0800 Subject: [PATCH] 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 Cc: James Bottomley Cc: Jens Axboe Cc: Greg KH Cc: Jeff Garzik Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/pci/pci.c | 8 ++++++++ drivers/pci/probe.c | 1 + include/linux/pci.h | 7 +++++++ 3 files changed, 16 insertions(+) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index be97090ddf..ae3df46eaa 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 f47d596d5e..4d23b9fb55 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 ba3a7f459d..7215d3b1f4 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; -- 2.39.5