PCI: Add DMA alias quirk for Intel VCA NTB
[ Upstream commit 56b4cd4b ] 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. Add aliases to 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. Link: https://lore.kernel.org/r/5683A335CC8BE1438C3C30C49DCC38DF637CED8E@IRSMSX102.ger.corp.intel.com Signed-off-by:Slawomir Pawlowski <slawomir.pawlowski@intel.com> Signed-off-by:
Przemek Kitszel <przemyslawx.kitszel@intel.com> Signed-off-by:
Bjorn Helgaas <bhelgaas@google.com> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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5be2654a
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