diff options
| author | Zhangfei Gao <zhangfei.gao@linaro.org> | 2021-07-13 10:54:34 +0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2021-08-26 14:21:42 -0500 |
| commit | 8c09e896cef8d908dd9a20a9f2a5c3fcb9799de3 (patch) | |
| tree | 0bbb22e4619e5c084f814c37f61e8af92f27ed80 /include/linux/pci.h | |
| parent | e73f0f0ee7541171d89f2e2491130c7771ba58d3 (diff) | |
| download | lwn-8c09e896cef8d908dd9a20a9f2a5c3fcb9799de3.tar.gz lwn-8c09e896cef8d908dd9a20a9f2a5c3fcb9799de3.zip | |
PCI: Allow PASID on fake PCIe devices without TLP prefixes
Some systems, e.g., HiSilicon KunPeng920 and KunPeng930, have devices that
appear as PCI but are actually on the AMBA bus. Some of these fake PCI
devices support a PASID-like feature and they do have a working PASID
capability even though they do not use the PCIe Transport Layer Protocol
and do not support TLP prefixes.
Add a pasid_no_tlp bit for this "PASID works without TLP prefixes" case and
update pci_enable_pasid() so it can enable PASID on these devices.
Set this bit for HiSilicon KunPeng920 and KunPeng930.
[bhelgaas: squashed, commit log]
Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/1626144876-11352-2-git-send-email-zhangfei.gao@linaro.org
Link: https://lore.kernel.org/r/1626144876-11352-3-git-send-email-zhangfei.gao@linaro.org
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'include/linux/pci.h')
| -rw-r--r-- | include/linux/pci.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index 540b377ca8f6..28165dc5b221 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -388,6 +388,7 @@ struct pci_dev { supported from root to here */ u16 l1ss; /* L1SS Capability pointer */ #endif + unsigned int pasid_no_tlp:1; /* PASID works without TLP Prefix */ unsigned int eetlp_prefix_path:1; /* End-to-End TLP Prefix */ pci_channel_state_t error_state; /* Current connectivity state */ |