PCI: Add ACS quirk for Zhaoxin multi-function devices

mainline inclusion
from mainline-5.6.9
commit 0325837c
category: PCI
bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=19
CVE: NA

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Some Zhaoxin endpoints are implemented as multi-function devices without an
ACS capability, but they actually don't support peer-to-peer transactions.
Add ACS quirks to declare DMA isolation.

Link: https://lore.kernel.org/r/20200327091148.5190-3-RaymondPang-oc@zhaoxin.com


Signed-off-by: Raymond Pang <RaymondPang-oc@zhaoxin.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: LeoLiu-oc <LeoLiu-oc@zhaoxin.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: LeoLiu-oc <LeoLiu-oc@zhaoxin.com>
Conflicts:
	drivers/pci/quirks.c
[Cheng Jian: adjust context]
Signed-off-by: Cheng Jian <cj.chengjian@huawei.com>

drivers/pci/quirks.c

@@ -4616,6 +4616,10 @@ static const struct pci_dev_acs_enabled {
 	{ PCI_VENDOR_ID_AMPERE, 0xE00A, pci_quirk_xgene_acs },
 	{ PCI_VENDOR_ID_AMPERE, 0xE00B, pci_quirk_xgene_acs },
 	{ PCI_VENDOR_ID_AMPERE, 0xE00C, pci_quirk_xgene_acs },
+	/* Zhaoxin multi-function devices */
+	{ PCI_VENDOR_ID_ZHAOXIN, 0x3038, pci_quirk_mf_endpoint_acs  },
+	{ PCI_VENDOR_ID_ZHAOXIN, 0x3104, pci_quirk_mf_endpoint_acs  },
+	{ PCI_VENDOR_ID_ZHAOXIN, 0x9083, pci_quirk_mf_endpoint_acs  },
 	{ 0 }
 };