The patch titled
iommu sg merging: PCI: add device_dma_parameters support
has been added to the -mm tree. Its filename is
iommu-sg-merging-pci-add-device_dma_parameters-support.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: iommu sg merging: PCI: add device_dma_parameters support
From: FUJITA Tomonori <tomof@xxxxxxx>
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@xxxxxxxxxxxxx>
Mostly-acked-by: Jeff Garzik <jeff@xxxxxxxxxx>
Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxx>
Cc: Jens Axboe <jens.axboe@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/pci/pci.c | 8 ++++++++
drivers/pci/probe.c | 3 +++
include/linux/pci.h | 4 ++++
3 files changed, 15 insertions(+)
diff -puN drivers/pci/pci.c~iommu-sg-merging-pci-add-device_dma_parameters-support drivers/pci/pci.c
--- a/drivers/pci/pci.c~iommu-sg-merging-pci-add-device_dma_parameters-support
+++ a/drivers/pci/pci.c
@@ -1418,6 +1418,14 @@ pci_set_consistent_dma_mask(struct pci_d
}
#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
diff -puN drivers/pci/probe.c~iommu-sg-merging-pci-add-device_dma_parameters-support drivers/pci/probe.c
--- a/drivers/pci/probe.c~iommu-sg-merging-pci-add-device_dma_parameters-support
+++ a/drivers/pci/probe.c
@@ -974,8 +974,11 @@ void pci_device_add(struct pci_dev *dev,
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);
diff -puN include/linux/pci.h~iommu-sg-merging-pci-add-device_dma_parameters-support include/linux/pci.h
--- a/include/linux/pci.h~iommu-sg-merging-pci-add-device_dma_parameters-support
+++ a/include/linux/pci.h
@@ -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. */
@@ -564,6 +566,7 @@ void pci_intx(struct pci_dev *dev, int e
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);
@@ -748,6 +751,7 @@ static inline void pci_set_master(struct
static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
static inline void pci_disable_device(struct pci_dev *dev) { }
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;}
static inline int __pci_register_driver(struct pci_driver *drv, struct module *owner) { return 0;}
static inline int pci_register_driver(struct pci_driver *drv) { return 0;}
_
Patches currently in -mm which might be from tomof@xxxxxxx are
git-scsi-misc.patch
iommu-sg-merging-add-device_dma_parameters-structure.patch
iommu-sg-merging-pci-add-device_dma_parameters-support.patch
iommu-sg-merging-x86-make-pci-gart-iommu-respect-the-segment-size-limits.patch
iommu-sg-merging-ppc-make-iommu-respect-the-segment-size-limits.patch
iommu-sg-merging-ia64-make-sba_iommu-respect-the-segment-size-limits.patch
iommu-sg-merging-alpha-make-pci_iommu-respect-the-segment-size-limits.patch
iommu-sg-merging-sparc64-make-iommu-respect-the-segment-size-limits.patch
iommu-sg-merging-parisc-make-iommu-respect-the-segment-size-limits.patch
iommu-sg-merging-call-blk_queue_segment_boundary-in-__scsi_alloc_queue.patch
iommu-sg-merging-sata_inic162x-use-pci_set_dma_max_seg_size.patch
iommu-sg-merging-aacraid-use-pci_set_dma_max_seg_size.patch
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