This patch series fixes various issues in pci-aardvark.c driver (PCIe controller on Marvell Armada 3700 SoC) used on Espressobin and Turris Mox. First patch fixes kernel panic (or TF-A panic depending on used firmware) during execution of PIO transfer and I would suggest to include this fix into v5.13 release to prevent future kernel panics. Other patches then fixes PIO issues, PCIe link training, initialization of PCIe controller, accessing PCIe Root Bridge/Port registers, handling of interrupts (including ERR and PME), setup of Multi-MSI interrupts, adding support for masking MSI interrupts, adding support for more than 32 MSI interrupts with MSI-X support, and adding support for AER. Note that there are still some unresolved issues with PCIe on A3720. I asked Marvell for PCIe documentation or explanations but I have not received anything (yet). Patch "Fix checking for PIO status" is taken from the Marvell github fork and adapted for inclusion into mainline kernel: https://github.com/MarvellEmbeddedProcessors/linux-marvell/commit/84444d22023c Whole patch series is available also in my git branch pci-aardvark: https://git.kernel.org/pub/scm/linux/kernel/git/pali/linux.git/log/?h=pci-aardvark If you have Espressobin, Turris Mox or other A3720 board with PCIe please test this patch series with your favourite PCIe card if everything is working fine. Evan Wang (1): PCI: aardvark: Fix checking for PIO status Pali Rohár (39): PCI: aardvark: Fix kernel panic during PIO transfer PCI: aardvark: Fix checking for PIO Non-posted Request PCI: aardvark: Increase polling delay to 1.5s while waiting for PIO response PCI: pci-bridge-emul: Add PCIe Root Capabilities Register PCI: aardvark: Fix reporting CRS Software Visibility on emulated bridge PCI: aardvark: Fix link training PCI: Add PCI_EXP_DEVCTL_PAYLOAD_* macros PCI: aardvark: Fix PCIe Max Payload Size setting PCI: aardvark: Implement workaround for the readback value of VEND_ID PCI: aardvark: Do not touch status bits of masked interrupts in interrupt handler PCI: aardvark: Check for virq mapping when processing INTx IRQ PCI: aardvark: Remove irq_mask_ack callback for INTx interrupts PCI: aardvark: Don't mask irq when mapping PCI: aardvark: Change name of INTx irq_chip to advk-INT PCI: aardvark: Remove unneeded goto PCI: aardvark: Fix support for MSI interrupts PCI: aardvark: Correctly clear and unmask all MSI interrupts PCI: aardvark: Fix setting MSI address PCI: aardvark: Add support for more than 32 MSI interrupts PCI: aardvark: Add support for masking MSI interrupts PCI: aardvark: Enable MSI-X support PCI: aardvark: Fix support for ERR interrupt on emulated bridge PCI: aardvark: Fix support for PME on emulated bridge PCI: aardvark: Fix support for PME requester on emulated bridge PCI: aardvark: Fix support for bus mastering and PCI_COMMAND on emulated bridge PCI: aardvark: Disable bus mastering and mask all interrupts when unbinding driver PCI: aardvark: Free config space for emulated root bridge when unbinding driver to fix memory leak PCI: aardvark: Reset PCIe card and disable PHY when unbinding driver PCI: aardvark: Rewrite irq code to chained irq handler PCI: aardvark: Use separate INTA interrupt for emulated root bridge PCI: pci-bridge-emul: Add description for class_revision field PCI: pci-bridge-emul: Add definitions for missing capabilities registers PCI: aardvark: Add support for DEVCAP2, DEVCTL2, LNKCAP2 and LNKCTL2 registers on emulated bridge PCI: aardvark: Add support for PCI_BRIDGE_CTL_BUS_RESET on emulated bridge PCI: aardvark: Replace custom PCIE_CORE_ERR_CAPCTL_* macros by linux/pci_regs.h macros PCI: aardvark: Replace custom PCIE_CORE_INT_* macros by linux PCI_INTERRUPT_* values PCI: aardvark: Cleanup some register macros PCI: aardvark: Add comments for OB_WIN_ENABLE and ADDR_WIN_DISABLE PCI: aardvark: Add support for Advanced Error Reporting registers on emulated bridge Russell King (2): PCI: pci-bridge-emul: re-arrange register tests PCI: pci-bridge-emul: add support for PCIe extended capabilities drivers/pci/controller/pci-aardvark.c | 980 +++++++++++++++++++------- drivers/pci/pci-bridge-emul.c | 149 ++-- drivers/pci/pci-bridge-emul.h | 17 +- include/uapi/linux/pci_regs.h | 6 + 4 files changed, 850 insertions(+), 302 deletions(-) -- 2.20.1
