From: Feng Kan Date: Wed, 21 Feb 2018 03:19:27 +0000 (-0800) Subject: PCI: Add ACS quirk for Ampere root ports X-Git-Tag: v4.19~1271^2~13^2~11 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4ef76ad0462cf25ce948541c8724eaa8a8365e1d;p=platform%2Fkernel%2Flinux-rpi.git PCI: Add ACS quirk for Ampere root ports The Ampere Computing PCIe root port does not support ACS at this point. However, the hardware provides isolation and source validation through the SMMU. The stream ID generated by the PCIe ports contain both the bus/device/function number as well as the port ID in its 3 most significant bits. Turn on ACS but disable all the peer-to-peer features. APM is being rebranded to Ampere. The Vendor and Device IDs change, but the functionality stays the same. Signed-off-by: Feng Kan Signed-off-by: Bjorn Helgaas --- diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index fc73401..57748a3 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4514,6 +4514,15 @@ static const struct pci_dev_acs_enabled { { PCI_VENDOR_ID_CAVIUM, PCI_ANY_ID, pci_quirk_cavium_acs }, /* APM X-Gene */ { PCI_VENDOR_ID_AMCC, 0xE004, pci_quirk_xgene_acs }, + /* Ampere Computing */ + { PCI_VENDOR_ID_AMPERE, 0xE005, pci_quirk_xgene_acs }, + { PCI_VENDOR_ID_AMPERE, 0xE006, pci_quirk_xgene_acs }, + { PCI_VENDOR_ID_AMPERE, 0xE007, pci_quirk_xgene_acs }, + { PCI_VENDOR_ID_AMPERE, 0xE008, pci_quirk_xgene_acs }, + { PCI_VENDOR_ID_AMPERE, 0xE009, pci_quirk_xgene_acs }, + { 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 }, { 0 } }; diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index a6b3066..c875d42 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -1333,6 +1333,7 @@ #define PCI_DEVICE_ID_IMS_TT3D 0x9135 #define PCI_VENDOR_ID_AMCC 0x10e8 +#define PCI_VENDOR_ID_AMPERE 0x1def #define PCI_VENDOR_ID_INTERG 0x10ea #define PCI_DEVICE_ID_INTERG_1682 0x1682