diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/850-v5.17-0003-PCI-aardvark-Add-support-for-DEVCAP2-DEVCTL2-LNKCAP2.patch')
| -rw-r--r-- | target/linux/generic/backport-5.15/850-v5.17-0003-PCI-aardvark-Add-support-for-DEVCAP2-DEVCTL2-LNKCAP2.patch | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/850-v5.17-0003-PCI-aardvark-Add-support-for-DEVCAP2-DEVCTL2-LNKCAP2.patch b/target/linux/generic/backport-5.15/850-v5.17-0003-PCI-aardvark-Add-support-for-DEVCAP2-DEVCTL2-LNKCAP2.patch new file mode 100644 index 0000000000..ce38719009 --- /dev/null +++ b/target/linux/generic/backport-5.15/850-v5.17-0003-PCI-aardvark-Add-support-for-DEVCAP2-DEVCTL2-LNKCAP2.patch @@ -0,0 +1,61 @@ +From 1d3e170344dff2cef8827db6c09909b78cbc11d7 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Tue, 30 Nov 2021 18:29:05 +0100 +Subject: [PATCH] PCI: aardvark: Add support for DEVCAP2, DEVCTL2, LNKCAP2 and + LNKCTL2 registers on emulated bridge +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +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> +--- + 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 +@@ -881,8 +881,13 @@ 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; + } +@@ -896,10 +901,6 @@ 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) +@@ -921,6 +922,12 @@ 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; + } |