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>,
kw@linux.com
Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
Zhangfei Gao <zhangfei.gao@linaro.org>
Subject: [PATCH v3 3/3] PCI: Set dma-can-stall for HiSilicon chips
Date: Tue, 9 Mar 2021 11:00:37 +0800 [thread overview]
Message-ID: <1615258837-12189-4-git-send-email-zhangfei.gao@linaro.org> (raw)
In-Reply-To: <1615258837-12189-1-git-send-email-zhangfei.gao@linaro.org>
HiSilicon KunPeng920 and KunPeng930 have devices appear as PCI but are
actually on the AMBA bus. These fake PCI devices can support SVA via
SMMU stall feature, by setting dma-can-stall for ACPI platforms.
Property dma-can-stall depends on patchset
https://lore.kernel.org/linux-iommu/20210302092644.2553014-1-jean-philippe@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>
---
drivers/pci/quirks.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 873d27f..b866cdf 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1827,10 +1827,23 @@ DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_HUAWEI, 0x1610, PCI_CLASS_BRIDGE_PCI
static void quirk_huawei_pcie_sva(struct pci_dev *pdev)
{
+ struct property_entry properties[] = {
+ PROPERTY_ENTRY_BOOL("dma-can-stall"),
+ {},
+ };
+
if (pdev->revision != 0x21 && pdev->revision != 0x30)
return;
pdev->pasid_no_tlp = 1;
+
+ /*
+ * Set the dma-can-stall property on ACPI platforms. Device tree
+ * can set it directly.
+ */
+ if (!pdev->dev.of_node &&
+ device_add_properties(&pdev->dev, properties))
+ pci_warn(pdev, "could not add stall property");
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_HUAWEI, 0xa250, quirk_huawei_pcie_sva);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_HUAWEI, 0xa251, quirk_huawei_pcie_sva);
--
2.9.5
prev parent reply other threads:[~2021-03-09 3:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-09 3:00 [PATCH v3 0/3] PCI: Add a quirk to enable SVA for HiSilicon chip Zhangfei Gao
2021-03-09 3:00 ` [PATCH v3 1/3] PCI: PASID can be enabled without TLP prefix Zhangfei Gao
2021-03-09 3:00 ` [PATCH v3 2/3] PCI: Add a quirk to set pasid_no_tlp for HiSilicon chips Zhangfei Gao
2021-03-09 3:00 ` Zhangfei Gao [this message]
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