linux-kernel - [PATCH 4/4] PCI: loongson move mrrs quirk to core

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Message-Id: <20210619063952.2008746-5-art@khadas.com>
Date:   Sat, 19 Jun 2021 14:39:52 +0800
From:   Artem Lapkin <email2tema@...il.com>
To:     narmstrong@...libre.com
Cc:     yue.wang@...ogic.com, khilman@...libre.com,
        lorenzo.pieralisi@....com, robh@...nel.org, kw@...ux.com,
        jbrunet@...libre.com, christianshewitt@...il.com,
        martin.blumenstingl@...glemail.com, linux-pci@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        art@...das.com, nick@...das.com, gouwa@...das.com
Subject: [PATCH 4/4] PCI: loongson move mrrs quirk to core

Replace dublicated functionality loongson_mrrs_quirk to mrrs_limit_quirk
from core pci quirks

Signed-off-by: Artem Lapkin <art@...das.com>
---
 drivers/pci/controller/pci-loongson.c | 42 ++-------------------------
 1 file changed, 3 insertions(+), 39 deletions(-)

diff --git a/drivers/pci/controller/pci-loongson.c b/drivers/pci/controller/pci-loongson.c
index 48169b1e3..5a54faf10 100644
--- a/drivers/pci/controller/pci-loongson.c
+++ b/drivers/pci/controller/pci-loongson.c
@@ -13,10 +13,6 @@
 #include "../pci.h"
 
 /* Device IDs */
-#define DEV_PCIE_PORT_0	0x7a09
-#define DEV_PCIE_PORT_1	0x7a19
-#define DEV_PCIE_PORT_2	0x7a29
-
 #define DEV_LS2K_APB	0x7a02
 #define DEV_LS7A_CONF	0x7a10
 #define DEV_LS7A_LPC	0x7a0c
@@ -38,11 +34,11 @@ static void bridge_class_quirk(struct pci_dev *dev)
 	dev->class = PCI_CLASS_BRIDGE_PCI << 8;
 }
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
-			DEV_PCIE_PORT_0, bridge_class_quirk);
+			PCI_DEVICE_ID_LOONGSON_PCIE_PORT_0, bridge_class_quirk);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
-			DEV_PCIE_PORT_1, bridge_class_quirk);
+			PCI_DEVICE_ID_LOONGSON_PCIE_PORT_1, bridge_class_quirk);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
-			DEV_PCIE_PORT_2, bridge_class_quirk);
+			PCI_DEVICE_ID_LOONGSON_PCIE_PORT_2, bridge_class_quirk);
 
 static void system_bus_quirk(struct pci_dev *pdev)
 {
@@ -60,38 +56,6 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
 			DEV_LS7A_LPC, system_bus_quirk);
 
-static void loongson_mrrs_quirk(struct pci_dev *dev)
-{
-	struct pci_bus *bus = dev->bus;
-	struct pci_dev *bridge;
-	static const struct pci_device_id bridge_devids[] = {
-		{ PCI_VDEVICE(LOONGSON, DEV_PCIE_PORT_0) },
-		{ PCI_VDEVICE(LOONGSON, DEV_PCIE_PORT_1) },
-		{ PCI_VDEVICE(LOONGSON, DEV_PCIE_PORT_2) },
-		{ 0, },
-	};
-
-	/* look for the matching bridge */
-	while (!pci_is_root_bus(bus)) {
-		bridge = bus->self;
-		bus = bus->parent;
-		/*
-		 * Some Loongson PCIe ports have a h/w limitation of
-		 * 256 bytes maximum read request size. They can't handle
-		 * anything larger than this. So force this limit on
-		 * any devices attached under these ports.
-		 */
-		if (pci_match_id(bridge_devids, bridge)) {
-			if (pcie_get_readrq(dev) > 256) {
-				pci_info(dev, "limiting MRRS to 256\n");
-				pcie_set_readrq(dev, 256);
-			}
-			break;
-		}
-	}
-}
-DECLARE_PCI_FIXUP_ENABLE(PCI_ANY_ID, PCI_ANY_ID, loongson_mrrs_quirk);
-
 static void __iomem *cfg1_map(struct loongson_pci *priv, int bus,
 				unsigned int devfn, int where)
 {
-- 
2.25.1