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iommu sg merging: PCI: add device_dma_parameters support 

This adds struct device_dma_parameters in struct pci_dev and properly
sets up a pointer in struct device.

The default max_segment_size is set to 64K, same to the block layer's
default value.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Mostly-acked-by: Jeff Garzik <jeff@garzik.org>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
FUJITA Tomonori 2008-02-04 22:27:55 -08:00 committed by Linus Torvalds
parent 6b7b651055
commit 4d57cdfaca
3 changed files with 20 additions and 0 deletions
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8
drivers/pci/pci.c
View File

@ -1451,6 +1451,14 @@ pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
}
#endif
#ifndef HAVE_ARCH_PCI_SET_DMA_MAX_SEGMENT_SIZE
int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size)
{
return dma_set_max_seg_size(&dev->dev, size);
}
EXPORT_SYMBOL(pci_set_dma_max_seg_size);
#endif
/**
* pcix_get_max_mmrbc - get PCI-X maximum designed memory read byte count
* @dev: PCI device to query

3
drivers/pci/probe.c
View File

@ -933,8 +933,11 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
set_dev_node(&dev->dev, pcibus_to_node(bus));
dev->dev.dma_mask = &dev->dma_mask;
dev->dev.dma_parms = &dev->dma_parms;
dev->dev.coherent_dma_mask = 0xffffffffull;
pci_set_dma_max_seg_size(dev, 65536);
/* Fix up broken headers */
pci_fixup_device(pci_fixup_header, dev);

9
include/linux/pci.h
View File

@ -159,6 +159,8 @@ struct pci_dev {
this if your device has broken DMA
or supports 64-bit transfers. */
struct device_dma_parameters dma_parms;
pci_power_t current_state; /* Current operating state. In ACPI-speak,
this is D0-D3, D0 being fully functional,
and D3 being off. */
@ -580,6 +582,7 @@ void pci_intx(struct pci_dev *dev, int enable);
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 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);
@ -822,6 +825,12 @@ static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
return -EIO;
}
static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
unsigned int size)
{
return -EIO;
}
static inline int pci_assign_resource(struct pci_dev *dev, int i)
{
return -EBUSY;