Commit 1d3e1703 authored by Pali Rohár's avatar Pali Rohár Committed by Lorenzo Pieralisi
Browse files

PCI: aardvark: Add support for DEVCAP2, DEVCTL2, LNKCAP2 and LNKCTL2 registers on emulated bridge 

PCI aardvark hardware supports access to DEVCAP2, DEVCTL2, LNKCAP2 and
LNKCTL2 configuration registers of PCIe core via PCIE_CORE_PCIEXP_CAP.
Export them via emulated software root bridge.

Link: https://lore.kernel.org/r/20211130172913.9727-4-kabel@kernel.org


Signed-off-by: default avatarPali Rohár <pali@kernel.org>
Signed-off-by: default avatarMarek Behún <kabel@kernel.org>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
parent 8ea673a8

drivers/pci/controller/pci-aardvark.c

+11 −4
Original line number Diff line number Diff line
@@ -884,8 +884,13 @@ advk_pci_bridge_emul_pcie_conf_read(struct pci_bridge_emul *bridge, 
	case PCI_CAP_LIST_ID:

	case PCI_EXP_DEVCAP:

	case PCI_EXP_DEVCTL:

	case PCI_EXP_DEVCAP2:

	case PCI_EXP_DEVCTL2:

	case PCI_EXP_LNKCAP2:

	case PCI_EXP_LNKCTL2:

		*value = advk_readl(pcie, PCIE_CORE_PCIEXP_CAP + reg);

		return PCI_BRIDGE_EMUL_HANDLED;



	default:

		return PCI_BRIDGE_EMUL_NOT_HANDLED;

	}
@@ -899,10 +904,6 @@ advk_pci_bridge_emul_pcie_conf_write(struct pci_bridge_emul *bridge, 
	struct advk_pcie *pcie = bridge->data;



	switch (reg) {

	case PCI_EXP_DEVCTL:

		advk_writel(pcie, new, PCIE_CORE_PCIEXP_CAP + reg);

		break;



	case PCI_EXP_LNKCTL:

		advk_writel(pcie, new, PCIE_CORE_PCIEXP_CAP + reg);

		if (new & PCI_EXP_LNKCTL_RL)
@@ -924,6 +925,12 @@ advk_pci_bridge_emul_pcie_conf_write(struct pci_bridge_emul *bridge, 
		advk_writel(pcie, new, PCIE_ISR0_REG);

		break;



	case PCI_EXP_DEVCTL:

	case PCI_EXP_DEVCTL2:

	case PCI_EXP_LNKCTL2:

		advk_writel(pcie, new, PCIE_CORE_PCIEXP_CAP + reg);

		break;



	default:

		break;

	}