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Message-Id: <1603971787-16784-2-git-send-email-mihai.carabas@oracle.com>
Date: Thu, 29 Oct 2020 13:43:04 +0200
From: Mihai Carabas <mihai.carabas@...cle.com>
To: linux-kernel@...r.kernel.org
Cc: Peng Hao <peng.hao2@....com.cn>,
Mihai Carabas <mihai.carabas@...cle.com>
Subject: [PATCH 1/4] misc/pvpanic : preparing for pvpanic driver framework
From: Peng Hao <peng.hao2@....com.cn>
Preparing for pvpanic driver framework. Create a pvpanic driver
directory and move current driver file to new directory.
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
Signed-off-by: Peng Hao <peng.hao2@....com.cn>
Signed-off-by: Mihai Carabas <mihai.carabas@...cle.com>
---
drivers/misc/Kconfig | 1 +
drivers/misc/Makefile | 2 +-
drivers/misc/pvpanic.c | 196 -----------------------------------------
drivers/misc/pvpanic/Kconfig | 7 ++
drivers/misc/pvpanic/Makefile | 5 ++
drivers/misc/pvpanic/pvpanic.c | 196 +++++++++++++++++++++++++++++++++++++++++
6 files changed, 210 insertions(+), 197 deletions(-)
delete mode 100644 drivers/misc/pvpanic.c
create mode 100644 drivers/misc/pvpanic/Kconfig
create mode 100644 drivers/misc/pvpanic/Makefile
create mode 100644 drivers/misc/pvpanic/pvpanic.c
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index d5ce808..6827657 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -466,6 +466,7 @@ config HISI_HIKEY_USB
switching between the dual-role USB-C port and the USB-A host ports
using only one USB controller.
+source "drivers/misc/pvpanic/Kconfig"
source "drivers/misc/c2port/Kconfig"
source "drivers/misc/eeprom/Kconfig"
source "drivers/misc/cb710/Kconfig"
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 2521359..3d6080b 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -53,7 +53,7 @@ obj-$(CONFIG_CXL_BASE) += cxl/
obj-$(CONFIG_PCI_ENDPOINT_TEST) += pci_endpoint_test.o
obj-$(CONFIG_OCXL) += ocxl/
obj-y += cardreader/
-obj-$(CONFIG_PVPANIC) += pvpanic.o
+obj-$(CONFIG_PVPANIC) += pvpanic/
obj-$(CONFIG_HABANA_AI) += habanalabs/
obj-$(CONFIG_UACCE) += uacce/
obj-$(CONFIG_XILINX_SDFEC) += xilinx_sdfec.o
diff --git a/drivers/misc/pvpanic.c b/drivers/misc/pvpanic.c
deleted file mode 100644
index e16a5e5..00000000
--- a/drivers/misc/pvpanic.c
+++ /dev/null
@@ -1,196 +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/acpi.h>
-#include <linux/kernel.h>
-#include <linux/kexec.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/platform_device.h>
-#include <linux/types.h>
-#include <uapi/misc/pvpanic.h>
-
-static void __iomem *base;
-
-MODULE_AUTHOR("Hu Tao <hutao@...fujitsu.com>");
-MODULE_DESCRIPTION("pvpanic device driver");
-MODULE_LICENSE("GPL");
-
-static void
-pvpanic_send_event(unsigned int event)
-{
- 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 */
-};
-
-#ifdef CONFIG_ACPI
-static int pvpanic_add(struct acpi_device *device);
-static int pvpanic_remove(struct acpi_device *device);
-
-static const struct acpi_device_id pvpanic_device_ids[] = {
- { "QEMU0001", 0 },
- { "", 0 }
-};
-MODULE_DEVICE_TABLE(acpi, pvpanic_device_ids);
-
-static struct acpi_driver pvpanic_driver = {
- .name = "pvpanic",
- .class = "QEMU",
- .ids = pvpanic_device_ids,
- .ops = {
- .add = pvpanic_add,
- .remove = pvpanic_remove,
- },
- .owner = THIS_MODULE,
-};
-
-static acpi_status
-pvpanic_walk_resources(struct acpi_resource *res, void *context)
-{
- struct resource r;
-
- if (acpi_dev_resource_io(res, &r)) {
-#ifdef CONFIG_HAS_IOPORT_MAP
- base = ioport_map(r.start, resource_size(&r));
- return AE_OK;
-#else
- return AE_ERROR;
-#endif
- } else if (acpi_dev_resource_memory(res, &r)) {
- base = ioremap(r.start, resource_size(&r));
- return AE_OK;
- }
-
- return AE_ERROR;
-}
-
-static int pvpanic_add(struct acpi_device *device)
-{
- int ret;
-
- ret = acpi_bus_get_status(device);
- if (ret < 0)
- return ret;
-
- if (!device->status.enabled || !device->status.functional)
- return -ENODEV;
-
- acpi_walk_resources(device->handle, METHOD_NAME__CRS,
- pvpanic_walk_resources, NULL);
-
- if (!base)
- return -ENODEV;
-
- atomic_notifier_chain_register(&panic_notifier_list,
- &pvpanic_panic_nb);
-
- return 0;
-}
-
-static int pvpanic_remove(struct acpi_device *device)
-{
-
- atomic_notifier_chain_unregister(&panic_notifier_list,
- &pvpanic_panic_nb);
- iounmap(base);
-
- return 0;
-}
-
-static int pvpanic_register_acpi_driver(void)
-{
- return acpi_bus_register_driver(&pvpanic_driver);
-}
-
-static void pvpanic_unregister_acpi_driver(void)
-{
- acpi_bus_unregister_driver(&pvpanic_driver);
-}
-#else
-static int pvpanic_register_acpi_driver(void)
-{
- return -ENODEV;
-}
-
-static void pvpanic_unregister_acpi_driver(void) {}
-#endif
-
-static int pvpanic_mmio_probe(struct platform_device *pdev)
-{
- base = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(base))
- return PTR_ERR(base);
-
- atomic_notifier_chain_register(&panic_notifier_list,
- &pvpanic_panic_nb);
-
- return 0;
-}
-
-static int pvpanic_mmio_remove(struct platform_device *pdev)
-{
-
- 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", },
- {}
-};
-
-static struct platform_driver pvpanic_mmio_driver = {
- .driver = {
- .name = "pvpanic-mmio",
- .of_match_table = pvpanic_mmio_match,
- },
- .probe = pvpanic_mmio_probe,
- .remove = pvpanic_mmio_remove,
-};
-
-static int __init pvpanic_mmio_init(void)
-{
- if (acpi_disabled)
- return platform_driver_register(&pvpanic_mmio_driver);
- else
- return pvpanic_register_acpi_driver();
-}
-
-static void __exit pvpanic_mmio_exit(void)
-{
- if (acpi_disabled)
- platform_driver_unregister(&pvpanic_mmio_driver);
- else
- pvpanic_unregister_acpi_driver();
-}
-
-module_init(pvpanic_mmio_init);
-module_exit(pvpanic_mmio_exit);
diff --git a/drivers/misc/pvpanic/Kconfig b/drivers/misc/pvpanic/Kconfig
new file mode 100644
index 00000000..3e612c6
--- /dev/null
+++ b/drivers/misc/pvpanic/Kconfig
@@ -0,0 +1,7 @@
+config PVPANIC
+ tristate "pvpanic device support"
+ depends on HAS_IOMEM && (ACPI || OF)
+ help
+ This driver provides support for the pvpanic device. pvpanic is
+ a paravirtualized device provided by QEMU; it lets a virtual machine
+ (guest) communicate panic events to the host.
diff --git a/drivers/misc/pvpanic/Makefile b/drivers/misc/pvpanic/Makefile
new file mode 100644
index 00000000..b8e6dc5
--- /dev/null
+++ b/drivers/misc/pvpanic/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2018 ZTE Ltd.
+
+obj-$(CONFIG_PVPANIC) += pvpanic.o
diff --git a/drivers/misc/pvpanic/pvpanic.c b/drivers/misc/pvpanic/pvpanic.c
new file mode 100644
index 00000000..e16a5e5
--- /dev/null
+++ b/drivers/misc/pvpanic/pvpanic.c
@@ -0,0 +1,196 @@
+// 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/acpi.h>
+#include <linux/kernel.h>
+#include <linux/kexec.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+#include <uapi/misc/pvpanic.h>
+
+static void __iomem *base;
+
+MODULE_AUTHOR("Hu Tao <hutao@...fujitsu.com>");
+MODULE_DESCRIPTION("pvpanic device driver");
+MODULE_LICENSE("GPL");
+
+static void
+pvpanic_send_event(unsigned int event)
+{
+ 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 */
+};
+
+#ifdef CONFIG_ACPI
+static int pvpanic_add(struct acpi_device *device);
+static int pvpanic_remove(struct acpi_device *device);
+
+static const struct acpi_device_id pvpanic_device_ids[] = {
+ { "QEMU0001", 0 },
+ { "", 0 }
+};
+MODULE_DEVICE_TABLE(acpi, pvpanic_device_ids);
+
+static struct acpi_driver pvpanic_driver = {
+ .name = "pvpanic",
+ .class = "QEMU",
+ .ids = pvpanic_device_ids,
+ .ops = {
+ .add = pvpanic_add,
+ .remove = pvpanic_remove,
+ },
+ .owner = THIS_MODULE,
+};
+
+static acpi_status
+pvpanic_walk_resources(struct acpi_resource *res, void *context)
+{
+ struct resource r;
+
+ if (acpi_dev_resource_io(res, &r)) {
+#ifdef CONFIG_HAS_IOPORT_MAP
+ base = ioport_map(r.start, resource_size(&r));
+ return AE_OK;
+#else
+ return AE_ERROR;
+#endif
+ } else if (acpi_dev_resource_memory(res, &r)) {
+ base = ioremap(r.start, resource_size(&r));
+ return AE_OK;
+ }
+
+ return AE_ERROR;
+}
+
+static int pvpanic_add(struct acpi_device *device)
+{
+ int ret;
+
+ ret = acpi_bus_get_status(device);
+ if (ret < 0)
+ return ret;
+
+ if (!device->status.enabled || !device->status.functional)
+ return -ENODEV;
+
+ acpi_walk_resources(device->handle, METHOD_NAME__CRS,
+ pvpanic_walk_resources, NULL);
+
+ if (!base)
+ return -ENODEV;
+
+ atomic_notifier_chain_register(&panic_notifier_list,
+ &pvpanic_panic_nb);
+
+ return 0;
+}
+
+static int pvpanic_remove(struct acpi_device *device)
+{
+
+ atomic_notifier_chain_unregister(&panic_notifier_list,
+ &pvpanic_panic_nb);
+ iounmap(base);
+
+ return 0;
+}
+
+static int pvpanic_register_acpi_driver(void)
+{
+ return acpi_bus_register_driver(&pvpanic_driver);
+}
+
+static void pvpanic_unregister_acpi_driver(void)
+{
+ acpi_bus_unregister_driver(&pvpanic_driver);
+}
+#else
+static int pvpanic_register_acpi_driver(void)
+{
+ return -ENODEV;
+}
+
+static void pvpanic_unregister_acpi_driver(void) {}
+#endif
+
+static int pvpanic_mmio_probe(struct platform_device *pdev)
+{
+ base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ atomic_notifier_chain_register(&panic_notifier_list,
+ &pvpanic_panic_nb);
+
+ return 0;
+}
+
+static int pvpanic_mmio_remove(struct platform_device *pdev)
+{
+
+ 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", },
+ {}
+};
+
+static struct platform_driver pvpanic_mmio_driver = {
+ .driver = {
+ .name = "pvpanic-mmio",
+ .of_match_table = pvpanic_mmio_match,
+ },
+ .probe = pvpanic_mmio_probe,
+ .remove = pvpanic_mmio_remove,
+};
+
+static int __init pvpanic_mmio_init(void)
+{
+ if (acpi_disabled)
+ return platform_driver_register(&pvpanic_mmio_driver);
+ else
+ return pvpanic_register_acpi_driver();
+}
+
+static void __exit pvpanic_mmio_exit(void)
+{
+ if (acpi_disabled)
+ platform_driver_unregister(&pvpanic_mmio_driver);
+ else
+ pvpanic_unregister_acpi_driver();
+}
+
+module_init(pvpanic_mmio_init);
+module_exit(pvpanic_mmio_exit);
--
1.8.3.1
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