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Subject[PATCH 34/42] PCI: aardvark: Add support for DEVCAP2, DEVCTL2, LNKCAP2 and LNKCTL2 registers on emulated bridge
Date
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.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <kabel@kernel.org>
Fixes: 8a3ebd8de328 ("PCI: aardvark: Implement emulated root PCI bridge config space")
---
drivers/pci/controller/pci-aardvark.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c
index e724d05a61a8..13bbc0b5134d 100644
--- a/drivers/pci/controller/pci-aardvark.c
+++ b/drivers/pci/controller/pci-aardvark.c
@@ -610,8 +610,13 @@ advk_pci_bridge_emul_pcie_conf_read(struct pci_bridge_emul *bridge,
case PCI_EXP_DEVCAP:
case PCI_EXP_DEVCTL:
case PCI_EXP_LNKCAP:
+ 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;
}
@@ -631,16 +636,18 @@ advk_pci_bridge_emul_pcie_conf_write(struct pci_bridge_emul *bridge,
*/

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)
advk_pcie_wait_for_retrain(pcie);
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;
}
--
2.20.1
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