From: David Daney <david.daney@xxxxxxxxxx> The on-chip devices all have fixed bars. So, fix them up. Signed-off-by: David Daney <david.daney@xxxxxxxxxx> --- drivers/pci/host/Kconfig | 6 +++ drivers/pci/host/Makefile | 1 + drivers/pci/host/quirks-thunder.c | 95 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 102 insertions(+) create mode 100644 drivers/pci/host/quirks-thunder.c diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig index d5e58ba..20d700d 100644 --- a/drivers/pci/host/Kconfig +++ b/drivers/pci/host/Kconfig @@ -145,4 +145,10 @@ config PCIE_IPROC_BCMA Say Y here if you want to use the Broadcom iProc PCIe controller through the BCMA bus interface +config PCI_QUIRKS_THUNDER + bool "PCI quirks for Cavium ThunderX SoCs" + depends on ARM64 + help + Say Y here to support ThunderX SoCs + endmenu diff --git a/drivers/pci/host/Makefile b/drivers/pci/host/Makefile index 140d66f..3ce7456 100644 --- a/drivers/pci/host/Makefile +++ b/drivers/pci/host/Makefile @@ -17,3 +17,4 @@ obj-$(CONFIG_PCI_VERSATILE) += pci-versatile.o obj-$(CONFIG_PCIE_IPROC) += pcie-iproc.o obj-$(CONFIG_PCIE_IPROC_PLATFORM) += pcie-iproc-platform.o obj-$(CONFIG_PCIE_IPROC_BCMA) += pcie-iproc-bcma.o +obj-$(CONFIG_PCI_QUIRKS_THUNDER) += quirks-thunder.o diff --git a/drivers/pci/host/quirks-thunder.c b/drivers/pci/host/quirks-thunder.c new file mode 100644 index 0000000..d615fd8 --- /dev/null +++ b/drivers/pci/host/quirks-thunder.c @@ -0,0 +1,95 @@ +/* + * PCIe quirks for Cavium Thunder SOC + * + * Copyright (C) 2014, 2015 Cavium Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + */ + +#include <linux/module.h> +#include <linux/pci.h> + +#define PCI_DEVICE_ID_THUNDER_BRIDGE 0xa002 + +/* + * All PCIe devices in Thunder have fixed resources, shouldn't be + * reassigned. + */ +static void thunder_pci_fixup_header(struct pci_dev *dev) +{ + int resno; + + /* Only fixup Thunder on-chip devices. */ + if ((dev->device & 0xff00) != 0xa000) + return; + + for (resno = 0; resno < PCI_NUM_RESOURCES; resno++) + if (dev->resource[resno].flags) + dev->resource[resno].flags |= IORESOURCE_PCI_FIXED; +#ifdef CONFIG_PCI_IOV + if (dev->device == 0xa01e) { + dev->resource[PCI_IOV_RESOURCES + 0] = dev->resource[0]; + dev->resource[PCI_IOV_RESOURCES + 0].start += 0xa0000000; + dev->resource[PCI_IOV_RESOURCES + 0].end = + dev->resource[PCI_IOV_RESOURCES + 0].start + 0x200000 - 1; + dev->resource[PCI_IOV_RESOURCES + 4] = dev->resource[0]; + dev->resource[PCI_IOV_RESOURCES + 4].start += 0xe0000000; + dev->resource[PCI_IOV_RESOURCES + 4].end = + dev->resource[PCI_IOV_RESOURCES + 4].start + 0x200000 - 1; + } +#endif +} +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CAVIUM, PCI_ANY_ID, thunder_pci_fixup_header); + +static void thunder_pci_fixup_final(struct pci_dev *dev) +{ + struct resource *res; + int resno; + + /* Only fixup Thunder on-chip devices. */ + if ((dev->device & 0xff00) != 0xa000) + return; + + if (dev->device == PCI_DEVICE_ID_THUNDER_BRIDGE) { + /* + * This bridge is just for the sake of supporting ARI + * for downstream devices. No resources are attached + * to it. Copy upstream root bus resources to bridge + * which aide in resource claiming for downstream + * devices + */ + + struct pci_bus *bus; + int resno; + + bus = dev->subordinate; + for (resno = 0; resno < PCI_BRIDGE_RESOURCE_NUM; resno++) { + bus->resource[resno] = pci_bus_resource_n(bus->parent, + PCI_BRIDGE_RESOURCE_NUM + resno); + } + + for (resno = PCI_BRIDGE_RESOURCES; + resno <= PCI_BRIDGE_RESOURCE_END; resno++) { + dev->resource[resno].start = dev->resource[resno].end = 0; + dev->resource[resno].flags = 0; + } + } else { + /* + * Claim the device's valid resources to set + * 'res->parent' hierarchy. + */ + for (resno = 0; resno < PCI_BRIDGE_RESOURCES; resno++) { + res = &dev->resource[resno]; + if (res->parent || !(res->flags & IORESOURCE_MEM)) + continue; + pci_claim_resource(dev, resno); + } + } +} +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CAVIUM, PCI_ANY_ID, thunder_pci_fixup_final); + +MODULE_DESCRIPTION("PCI quirks for Cavium Thunder ECAM based devices"); +MODULE_LICENSE("GPL v2"); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html