misc/pvpanic: split-up generic and platform dependent code

Split-up generic and platform dependent code in order to be able to re-use
generic event handling code in pvpanic PCI device driver in the next patches.

The code from pvpanic.c was split in two new files:
- pvpanic.c: generic code that handles pvpanic events
- pvpanic-mmio.c: platform/bus dependent code

Signed-off-by: Mihai Carabas <mihai.carabas@oracle.com>
Link: https://lore.kernel.org/r/1616597356-20696-2-git-send-email-mihai.carabas@oracle.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 161 deletions

diff --git a/drivers/misc/pvpanic.c b/drivers/misc/pvpanic.c
deleted file mode 100644
index f1655f5ca016..000000000000
--- a/drivers/misc/pvpanic.c
+++ /dev/null
@@ -1,161 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- *  Pvpanic Device Support
- *
- *  Copyright (C) 2013 Fujitsu.
- *  Copyright (C) 2018 ZTE.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/io.h>
-#include <linux/kernel.h>
-#include <linux/kexec.h>
-#include <linux/mod_devicetable.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/types.h>
-
-#include <uapi/misc/pvpanic.h>
-
-static void __iomem *base;
-static unsigned int capability = PVPANIC_PANICKED | PVPANIC_CRASH_LOADED;
-static unsigned int events;
-
-static ssize_t capability_show(struct device *dev,
-			       struct device_attribute *attr, char *buf)
-{
-	return sysfs_emit(buf, "%x\n", capability);
-}
-static DEVICE_ATTR_RO(capability);
-
-static ssize_t events_show(struct device *dev,  struct device_attribute *attr, char *buf)
-{
-	return sysfs_emit(buf, "%x\n", events);
-}
-
-static ssize_t events_store(struct device *dev,  struct device_attribute *attr,
-			    const char *buf, size_t count)
-{
-	unsigned int tmp;
-	int err;
-
-	err = kstrtouint(buf, 16, &tmp);
-	if (err)
-		return err;
-
-	if ((tmp & capability) != tmp)
-		return -EINVAL;
-
-	events = tmp;
-
-	return count;
-
-}
-static DEVICE_ATTR_RW(events);
-
-static struct attribute *pvpanic_dev_attrs[] = {
-	&dev_attr_capability.attr,
-	&dev_attr_events.attr,
-	NULL
-};
-ATTRIBUTE_GROUPS(pvpanic_dev);
-
-MODULE_AUTHOR("Hu Tao <hutao@cn.fujitsu.com>");
-MODULE_DESCRIPTION("pvpanic device driver");
-MODULE_LICENSE("GPL");
-
-static void
-pvpanic_send_event(unsigned int event)
-{
-	if (event & capability & events)
-		iowrite8(event, base);
-}
-
-static int
-pvpanic_panic_notify(struct notifier_block *nb, unsigned long code,
-		     void *unused)
-{
-	unsigned int event = PVPANIC_PANICKED;
-
-	if (kexec_crash_loaded())
-		event = PVPANIC_CRASH_LOADED;
-
-	pvpanic_send_event(event);
-
-	return NOTIFY_DONE;
-}
-
-static struct notifier_block pvpanic_panic_nb = {
-	.notifier_call = pvpanic_panic_notify,
-	.priority = 1, /* let this called before broken drm_fb_helper */
-};
-
-static int pvpanic_mmio_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct resource *res;
-
-	res = platform_get_mem_or_io(pdev, 0);
-	if (!res)
-		return -EINVAL;
-
-	switch (resource_type(res)) {
-	case IORESOURCE_IO:
-		base = devm_ioport_map(dev, res->start, resource_size(res));
-		if (!base)
-			return -ENOMEM;
-		break;
-	case IORESOURCE_MEM:
-		base = devm_ioremap_resource(dev, res);
-		if (IS_ERR(base))
-			return PTR_ERR(base);
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	/* initlize capability by RDPT */
-	capability &= ioread8(base);
-	events = capability;
-
-	if (capability)
-		atomic_notifier_chain_register(&panic_notifier_list,
-					       &pvpanic_panic_nb);
-
-	return 0;
-}
-
-static int pvpanic_mmio_remove(struct platform_device *pdev)
-{
-
-	if (capability)
-		atomic_notifier_chain_unregister(&panic_notifier_list,
-						 &pvpanic_panic_nb);
-
-	return 0;
-}
-
-static const struct of_device_id pvpanic_mmio_match[] = {
-	{ .compatible = "qemu,pvpanic-mmio", },
-	{}
-};
-MODULE_DEVICE_TABLE(of, pvpanic_mmio_match);
-
-static const struct acpi_device_id pvpanic_device_ids[] = {
-	{ "QEMU0001", 0 },
-	{ "", 0 }
-};
-MODULE_DEVICE_TABLE(acpi, pvpanic_device_ids);
-
-static struct platform_driver pvpanic_mmio_driver = {
-	.driver = {
-		.name = "pvpanic-mmio",
-		.of_match_table = pvpanic_mmio_match,
-		.acpi_match_table = pvpanic_device_ids,
-		.dev_groups = pvpanic_dev_groups,
-	},
-	.probe = pvpanic_mmio_probe,
-	.remove = pvpanic_mmio_remove,
-};
-module_platform_driver(pvpanic_mmio_driver);