linux-kernel - [PATCH v2] PCI: Extend PCI root port device IDs for Zhaoxin platforms

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Date:   Mon, 11 Dec 2023 17:15:43 +0800
From:   LeoLiu-oc <LeoLiu-oc@...oxin.com>
To:     <bhelgaas@...gle.com>, <linux-pci@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <CobeChen@...oxin.com>, <TonyWWang@...oxin.com>,
        <YeeLi@...oxin.com>, <Leoliu@...oxin.com>,
        LeoLiuoc <LeoLiu-oc@...oxin.com>
Subject: [PATCH v2] PCI: Extend PCI root port device IDs for Zhaoxin platforms

From: LeoLiuoc <LeoLiu-oc@...oxin.com>

Add more PCI root port device IDs to the
pci_quirk_zhaoxin_pcie_ports_acs() for some new Zhaoxin platforms.

v1 -> v2:
1. Add a note to indicate future Zhaoxin devices will implement ACS
Capability based on the PCIe Spec.
2. Includes DID of more Zhaoxin devices that have not yet implemented ACS
Capability.

Signed-off-by: LeoLiuoc <LeoLiu-oc@...oxin.com>
---
 drivers/pci/quirks.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index ea476252280a..f4546590d9e3 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4706,10 +4706,14 @@ static int  pci_quirk_zhaoxin_pcie_ports_acs(struct pci_dev *dev, u16 acs_flags)
 	     (pci_pcie_type(dev) != PCI_EXP_TYPE_DOWNSTREAM)))
 		return -ENOTTY;
 
+	/*
+	 * Future Zhaoxin Root Ports and Switch Downstream Ports will implement ACS
+	 * capability in accordance with the PCIe Spec.
+	 */
 	switch (dev->device) {
 	case 0x0710 ... 0x071e:
 	case 0x0721:
-	case 0x0723 ... 0x0732:
+	case 0x0723 ... 0x0752:
 		return pci_acs_ctrl_enabled(acs_flags,
 			PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
 	}
-- 
2.34.1