PCI: Add DMA alias quirk for Intel VCA NTB

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2260, quirk_mic_x200_dma_alias);

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2264, quirk_mic_x200_dma_alias);

/*

 * Intel Visual Compute Accelerator (VCA) is a family of PCIe add-in devices

 * exposing computational units via Non Transparent Bridges (NTB, PEX 87xx).

 *

 * Similarly to MIC x200, we need to add DMA aliases to allow buffer access

 * when IOMMU is enabled.  These aliases allow computational unit access to

 * host memory.  These aliases mark the whole VCA device as one IOMMU

 * group.

 *

 * All possible slot numbers (0x20) are used, since we are unable to tell

 * what slot is used on other side.  This quirk is intended for both host

 * and computational unit sides.  The VCA devices have up to five functions

 * (four for DMA channels and one additional).

 */

static void quirk_pex_vca_alias(struct pci_dev *pdev)

{

	const unsigned int num_pci_slots = 0x20;

	unsigned int slot;

	for (slot = 0; slot < num_pci_slots; slot++) {

		pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x0));

		pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x1));

		pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x2));

		pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x3));

		pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x4));

	}

}

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2954, quirk_pex_vca_alias);

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2955, quirk_pex_vca_alias);

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2956, quirk_pex_vca_alias);

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2958, quirk_pex_vca_alias);

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2959, quirk_pex_vca_alias);

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x295A, quirk_pex_vca_alias);

/*

 * The IOMMU and interrupt controller on Broadcom Vulcan/Cavium ThunderX2 are

 * associated not at the root bus, but at a bridge below. This quirk avoids