From d9c3d6ff227cbdf05399ba8303bdcd0d35bbfccb Mon Sep 17 00:00:00 2001 From: Keith Busch Date: Tue, 12 Jan 2016 13:18:08 -0700 Subject: 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 Signed-off-by: Bjorn Helgaas --- arch/x86/include/asm/device.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'arch/x86/include/asm') diff --git a/arch/x86/include/asm/device.h b/arch/x86/include/asm/device.h index 03dd72957d2f..684ed6c3aa67 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 { }; -- cgit v1.2.3