142a41da39
When ARCH=x86, make allmodconfig && make W=1 C=1 reports: WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/dwc/pci-exynos.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/pci-host-generic.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/pcie-altera.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/pcie-altera-msi.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/pcie-mediatek.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/pcie-mediatek-gen3.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/vmd.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/pcie-apple.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pci/controller/pcie-mt7621.o Add the missing MODULE_DESCRIPTION() macro. [kwilczynski: update MODULE_DESCRIPTION() text, commit log] Link: https://lore.kernel.org/linux-pci/20240626-md-drivers-pci-controller-v2-1-94c811db7a51@quicinc.com Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com> Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Acked-by: Nirmal Patel <nirmal.patel@linux.intel.com> Acked-by: Sergio Paracuellos <sergio.paracuellos@gmail.com> # MT7621
91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Simple, generic PCI host controller driver targeting firmware-initialised
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* systems and virtual machines (e.g. the PCI emulation provided by kvmtool).
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*
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* Copyright (C) 2014 ARM Limited
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*
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* Author: Will Deacon <will.deacon@arm.com>
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/pci-ecam.h>
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#include <linux/platform_device.h>
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static const struct pci_ecam_ops gen_pci_cfg_cam_bus_ops = {
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.bus_shift = 16,
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.pci_ops = {
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.map_bus = pci_ecam_map_bus,
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.read = pci_generic_config_read,
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.write = pci_generic_config_write,
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}
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};
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static bool pci_dw_valid_device(struct pci_bus *bus, unsigned int devfn)
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{
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struct pci_config_window *cfg = bus->sysdata;
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/*
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* The Synopsys DesignWare PCIe controller in ECAM mode will not filter
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* type 0 config TLPs sent to devices 1 and up on its downstream port,
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* resulting in devices appearing multiple times on bus 0 unless we
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* filter out those accesses here.
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*/
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if (bus->number == cfg->busr.start && PCI_SLOT(devfn) > 0)
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return false;
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return true;
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}
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static void __iomem *pci_dw_ecam_map_bus(struct pci_bus *bus,
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unsigned int devfn, int where)
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{
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if (!pci_dw_valid_device(bus, devfn))
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return NULL;
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return pci_ecam_map_bus(bus, devfn, where);
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}
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static const struct pci_ecam_ops pci_dw_ecam_bus_ops = {
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.pci_ops = {
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.map_bus = pci_dw_ecam_map_bus,
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.read = pci_generic_config_read,
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.write = pci_generic_config_write,
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}
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};
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static const struct of_device_id gen_pci_of_match[] = {
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{ .compatible = "pci-host-cam-generic",
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.data = &gen_pci_cfg_cam_bus_ops },
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{ .compatible = "pci-host-ecam-generic",
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.data = &pci_generic_ecam_ops },
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{ .compatible = "marvell,armada8k-pcie-ecam",
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.data = &pci_dw_ecam_bus_ops },
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{ .compatible = "socionext,synquacer-pcie-ecam",
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.data = &pci_dw_ecam_bus_ops },
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{ .compatible = "snps,dw-pcie-ecam",
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.data = &pci_dw_ecam_bus_ops },
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{ },
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};
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MODULE_DEVICE_TABLE(of, gen_pci_of_match);
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static struct platform_driver gen_pci_driver = {
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.driver = {
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.name = "pci-host-generic",
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.of_match_table = gen_pci_of_match,
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},
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.probe = pci_host_common_probe,
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.remove_new = pci_host_common_remove,
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};
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module_platform_driver(gen_pci_driver);
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MODULE_DESCRIPTION("Generic PCI host controller driver");
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MODULE_LICENSE("GPL v2");
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