Commit 64019197 authored by wusheng's avatar wusheng Committed by Hongchen Zhang
Browse files

pci/quirks: LS7A2000 enable msi 

LoongArch inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/IAZ38J



--------------------------------

7A2000 pcie of port H need to enable MSI when host bridge

Signed-off-by: default avatarwusheng <wusheng@loongson.cn>
parent 43acbd37

drivers/pci/quirks.c

+14 −0
Original line number Diff line number Diff line
@@ -383,6 +383,20 @@ static void quirk_tigerpoint_bm_sts(struct pci_dev *dev) 
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_TGP_LPC, quirk_tigerpoint_bm_sts);

#endif



static void loongson_pcie_msi_quirk(struct pci_dev *dev)

{

	u16 val;

	u16 class;



	class = dev->class >> 8;

	if (class == PCI_CLASS_BRIDGE_HOST) {

		pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &val);

		val |= PCI_MSI_FLAGS_ENABLE;

		pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, val);

	}

}

DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, 0x7a59, loongson_pcie_msi_quirk);



/* Chipsets where PCI->PCI transfers vanish or hang */

static void quirk_nopcipci(struct pci_dev *dev)

{