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| author | Keith Busch <keith.busch@intel.com> | 2016-01-12 20:18:08 (GMT) |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-01-15 19:54:55 (GMT) |
| commit | d9c3d6ff227cbdf05399ba8303bdcd0d35bbfccb (patch) | |
| tree | 30d6c505b91234f96b6f7acb0feab98a22f59d9a /arch/x86/include | |
| parent | 64bce3e8bfb3cf2cbc638296390af3e02e747347 (diff) | |
| download | linux-d9c3d6ff227cbdf05399ba8303bdcd0d35bbfccb.tar.xz | |
x86/PCI: Allow DMA ops specific to a PCI domain
The Intel Volume Management Device (VMD) is a PCIe endpoint that acts as a
host bridge to another PCI domain. When devices below the VMD perform DMA,
the VMD replaces their DMA source IDs with its own source ID. Therefore,
those devices require special DMA ops.
Add interfaces to allow the VMD driver to set up dma_ops for the devices
below it.
[bhelgaas: remove "extern", add "static", changelog]
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/device.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/include/asm/device.h b/arch/x86/include/asm/device.h index 03dd729..684ed6c 100644 --- a/arch/x86/include/asm/device.h +++ b/arch/x86/include/asm/device.h @@ -10,6 +10,16 @@ struct dev_archdata { #endif }; +#if defined(CONFIG_X86_DEV_DMA_OPS) && defined(CONFIG_PCI_DOMAINS) +struct dma_domain { + struct list_head node; + struct dma_map_ops *dma_ops; + int domain_nr; +}; +void add_dma_domain(struct dma_domain *domain); +void del_dma_domain(struct dma_domain *domain); +#endif + struct pdev_archdata { }; |