From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-bn1on0080.outbound.protection.outlook.com ([157.56.110.80]:42696 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753102AbcA2ViB (ORCPT ); Fri, 29 Jan 2016 16:38:01 -0500 To: , CC: Tirumalesh Chalamarla , "Richter, Robert" From: Manish Jaggi Subject: [PATCH] PCI: Add cavium acs pci quirk Message-ID: <56ABC5AE.1050209@caviumnetworks.com> Date: Sat, 30 Jan 2016 01:33:58 +0530 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Sender: linux-pci-owner@vger.kernel.org List-ID: Cavium devices matching this quirk do not perform peer-to-peer with other functions, allowing masking out these bits as if they were unimplemented in the ACS capability. Acked-by: Tirumalesh Chalamarla Signed-off-by: Manish Jaggi --- drivers/pci/quirks.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 7e32730..a300fa6 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -3814,6 +3814,19 @@ static int pci_quirk_amd_sb_acs(struct pci_dev *dev, u16 acs_flags) #endif } +static int pci_quirk_cavium_acs(struct pci_dev *dev, u16 acs_flags) +{ + /* + * Cavium devices matching this quirk do not perform + * peer-to-peer with other functions, allowing masking out + * these bits as if they were unimplemented in the ACS capability. + */ + acs_flags &= ~(PCI_ACS_SV | PCI_ACS_TB | PCI_ACS_RR | + PCI_ACS_CR | PCI_ACS_UF | PCI_ACS_DT); + + return acs_flags ? 0 : 1; +} + /* * Many Intel PCH root ports do provide ACS-like features to disable peer * transactions and validate bus numbers in requests, but do not provide an @@ -3966,6 +3979,8 @@ static const struct pci_dev_acs_enabled { { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_quirk_intel_pch_acs }, { 0x19a2, 0x710, pci_quirk_mf_endpoint_acs }, /* Emulex BE3-R */ { 0x10df, 0x720, pci_quirk_mf_endpoint_acs }, /* Emulex Skyhawk-R */ + /* Cavium ThunderX */ + { PCI_VENDOR_ID_CAVIUM, PCI_ANY_ID, pci_quirk_cavium_acs }, { 0 } }; -- 1.9.1