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

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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: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
This commit is contained in:
Pali Rohár 2021-11-30 18:29:05 +01:00 committed by Lorenzo Pieralisi
parent 8ea673a8b3
commit 1d3e170344
1 changed files with 11 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
drivers/pci/controller/pci-aardvark.c
View file

@ -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;
}