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[v2,0/3] PCI: Add a quirk to enable SVA for HiSilicon chip

Message ID 1610960316-28935-1-git-send-email-zhangfei.gao@linaro.org (mailing list archive)
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Series PCI: Add a quirk to enable SVA for HiSilicon chip | expand

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Zhangfei Gao Jan. 18, 2021, 8:58 a.m. UTC 
HiSilicon KunPeng920 and KunPeng930 have devices appear as PCI but are
actually on the AMBA bus. These fake PCI devices have PASID capability
though not supporting TLP.

Add a quirk to set pasid_no_tlp and dma-can-stall for these devices.

v2:
Add a new pci_dev bit: pasid_no_tlp, suggested by Bjorn 
"Apparently these devices have a PASID capability.  I think you should
add a new pci_dev bit that is specific to this idea of "PASID works
without TLP prefixes" and then change pci_enable_pasid() to look at
that bit as well as eetlp_prefix_path."
https://lore.kernel.org/linux-pci/20210112170230.GA1838341@bjorn-Precision-5520/

Zhangfei Gao (3):
  PCI: PASID can be enabled without TLP prefix
  PCI: Add a quirk to set pasid_no_tlp for HiSilicon chip
  PCI: set dma-can-stall for HiSilicon chip

 drivers/pci/ats.c    |  2 +-
 drivers/pci/quirks.c | 27 +++++++++++++++++++++++++++
 include/linux/pci.h  |  1 +
 3 files changed, 29 insertions(+), 1 deletion(-)