c1426d392a
pvpanic-mmio.c and pvpanic-pci.c share a lot of code. Refactor it into pvpanic.c where it doesn't have to be kept in sync manually and where the core logic can be understood more easily. No functional change. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Link: https://lore.kernel.org/r/20231011-pvpanic-cleanup-v2-1-4b21d56f779f@weissschuh.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Pvpanic MMIO Device Support
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*
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* Copyright (C) 2013 Fujitsu.
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* Copyright (C) 2018 ZTE.
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* Copyright (C) 2021 Oracle.
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*/
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/kexec.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <uapi/misc/pvpanic.h>
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#include "pvpanic.h"
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MODULE_AUTHOR("Hu Tao <hutao@cn.fujitsu.com>");
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MODULE_DESCRIPTION("pvpanic-mmio device driver");
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MODULE_LICENSE("GPL");
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static int pvpanic_mmio_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct resource *res;
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void __iomem *base;
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res = platform_get_mem_or_io(pdev, 0);
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if (!res)
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return -EINVAL;
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switch (resource_type(res)) {
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case IORESOURCE_IO:
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base = devm_ioport_map(dev, res->start, resource_size(res));
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if (!base)
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return -ENOMEM;
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break;
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case IORESOURCE_MEM:
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base = devm_ioremap_resource(dev, res);
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if (IS_ERR(base))
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return PTR_ERR(base);
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break;
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default:
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return -EINVAL;
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}
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return devm_pvpanic_probe(dev, base);
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}
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static const struct of_device_id pvpanic_mmio_match[] = {
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{ .compatible = "qemu,pvpanic-mmio", },
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{}
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};
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MODULE_DEVICE_TABLE(of, pvpanic_mmio_match);
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static const struct acpi_device_id pvpanic_device_ids[] = {
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{ "QEMU0001", 0 },
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{ "", 0 }
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};
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MODULE_DEVICE_TABLE(acpi, pvpanic_device_ids);
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static struct platform_driver pvpanic_mmio_driver = {
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.driver = {
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.name = "pvpanic-mmio",
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.of_match_table = pvpanic_mmio_match,
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.acpi_match_table = pvpanic_device_ids,
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.dev_groups = pvpanic_dev_groups,
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},
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.probe = pvpanic_mmio_probe,
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};
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module_platform_driver(pvpanic_mmio_driver);
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