From: Pali Roh�r pali@kernel.org
commit 1d3e170344dff2cef8827db6c09909b78cbc11d7 upstream.
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 Roh�r pali@kernel.org Signed-off-by: Marek Beh�n kabel@kernel.org Signed-off-by: Lorenzo Pieralisi lorenzo.pieralisi@arm.com Signed-off-by: Marek Beh�n kabel@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pci/controller/pci-aardvark.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-)
--- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -876,8 +876,13 @@ advk_pci_bridge_emul_pcie_conf_read(stru
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; } @@ -891,10 +896,6 @@ advk_pci_bridge_emul_pcie_conf_write(str 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) @@ -916,6 +917,12 @@ advk_pci_bridge_emul_pcie_conf_write(str 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; }