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* [PATCH 0/3] AMD IOMMU Changes for NTB
@ 2019-10-08 22:18 Logan Gunthorpe
  2019-10-08 22:18 ` [PATCH 1/3] iommu/amd: Implement dma_[un]map_resource() Logan Gunthorpe
                   ` (2 more replies)
  0 siblings, 3 replies; 9+ messages in thread
From: Logan Gunthorpe @ 2019-10-08 22:18 UTC (permalink / raw)
  To: linux-kernel, iommu, Joerg Roedel; +Cc: Logan Gunthorpe, Kit Chow

Hi,

Please find the following patches which help support
Non-Transparent-Bridge (NTB) devices on AMD platforms with the IOMMU
enabled.

The first patch implements dma_map_resource() correctly with the AMD
IOMMU. This is required for correct functioning of ntb_transport which
uses that interface.

The second two patches add support for multiple PCI aliases. NTB
hardware will normally send TLPs from a range of requestor IDs to
facilitate routing the responses back to the correct requestor on the
other side of the bridge. To support this, NTB hardware registers a
number of PCI aliases. Currently the AMD IOMMU only allows for one
PCI alias so TLPs from the other aliases get rejected.

See commit ad281ecf1c7d ("PCI: Add DMA alias quirk for Microsemi
Switchtec NTB") for more information on this.

Similar patches were upstreamed for Intel hardware earlier this year:

commit 21d5d27c042d ("iommu/vt-d: Implement dma_[un]map_resource()")
commit 3f0c625c6ae7 ("iommu/vt-d: Allow interrupts from the entire bus
    for aliased devices")

Thanks,

Logan

--

Kit Chow (1):
  iommu/amd: Implement dma_[un]map_resource()

Logan Gunthorpe (2):
  iommu/amd: Support multiple PCI DMA aliases in device table
  iommu/amd: Support multiple PCI DMA aliases in IRQ Remapping

 drivers/iommu/amd_iommu.c       | 198 +++++++++++++++++++-------------
 drivers/iommu/amd_iommu_types.h |   2 +-
 2 files changed, 120 insertions(+), 80 deletions(-)

--
2.20.1
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^ permalink raw reply	[flat|nested] 9+ messages in thread

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Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-10-08 22:18 [PATCH 0/3] AMD IOMMU Changes for NTB Logan Gunthorpe
2019-10-08 22:18 ` [PATCH 1/3] iommu/amd: Implement dma_[un]map_resource() Logan Gunthorpe
2019-10-09  6:57   ` Christoph Hellwig
2019-10-09 16:17     ` Logan Gunthorpe
2019-10-09 16:17       ` Logan Gunthorpe
2019-10-08 22:18 ` [PATCH 2/3] iommu/amd: Support multiple PCI DMA aliases in device table Logan Gunthorpe
2019-10-08 22:18 ` [PATCH 3/3] iommu/amd: Support multiple PCI DMA aliases in IRQ Remapping Logan Gunthorpe
2019-10-15 13:37   ` Joerg Roedel
2019-10-15 16:16     ` Logan Gunthorpe

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