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From:   Zhangfei Gao <zhangfei.gao@linaro.org>
To:     Bjorn Helgaas <bhelgaas@google.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Arnd Bergmann <arnd@arndb.de>,
        jean-philippe <jean-philippe@linaro.org>,
        kenneth-lee-2012@foxmail.com, Wangzhou <wangzhou1@hisilicon.com>
Cc:     linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
        Zhangfei Gao <zhangfei.gao@linaro.org>
Subject: [PATCH v4 0/3] PCI: Add a quirk to enable SVA for HiSilicon chip
Date:   Wed,  9 Jun 2021 11:36:38 +0800
Message-Id: <1623209801-1709-1-git-send-email-zhangfei.gao@linaro.org>
Precedence: bulk

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.

Jean's dma-can-stall patchset has been accepted
https://lore.kernel.org/linux-iommu/162314710744.3707892.6632600736379822229.b4-ty@kernel.org/

v4: 
Applied to Linux 5.13-rc2, and build successfully with only these three patches.

v3:
https://lore.kernel.org/linux-pci/1615258837-12189-1-git-send-email-zhangfei.gao@linaro.org/
Rebase to Linux 5.12-rc1
Change commit msg adding:
Property dma-can-stall depends on patchset
https://lore.kernel.org/linux-iommu/20210302092644.2553014-1-jean-philippe@linaro.org/

By the way the patchset can directly applied on 5.12-rc1 and build successfully though
without the dependent patchset.

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 chips
  PCI: Set dma-can-stall for HiSilicon chips

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

-- 
2.7.4