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From:   Mihai Carabas <mihai.carabas@oracle.com>
To:     linux-kernel@vger.kernel.org
Cc:     gregkh@linuxfoundation.org, arnd@arndb.de,
        andriy.shevchenko@linux.intel.com, bobo.shaobowang@huawei.com,
        Mihai Carabas <mihai.carabas@oracle.com>
Subject: [PATCH 2/2] misc/pvpanic: add pci driver
Date:   Wed,  3 Feb 2021 16:43:59 +0200
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Add pvpanic pci device driver support.

Signed-off-by: Mihai Carabas <mihai.carabas@oracle.com>
---
 drivers/misc/pvpanic/Kconfig       | 16 ++++++++++-
 drivers/misc/pvpanic/Makefile      |  7 +++++
 drivers/misc/pvpanic/pvpanic-pci.c | 54 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 76 insertions(+), 1 deletion(-)
 create mode 100644 drivers/misc/pvpanic/pvpanic-pci.c

diff --git a/drivers/misc/pvpanic/Kconfig b/drivers/misc/pvpanic/Kconfig
index 12bb017..4a96e8d 100644
--- a/drivers/misc/pvpanic/Kconfig
+++ b/drivers/misc/pvpanic/Kconfig
@@ -1,6 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# pvpanic device
+#
+
 config PVPANIC
 	bool "pvpanic device support"
-	depends on PVPANIC_MMIO
+	depends on (PVPANIC_MMIO || PVPANIC_PCI)
 	help
 	  This option enable generic code for pvpanic device driver logic.
 
@@ -12,3 +17,12 @@ config PVPANIC_MMIO
 	  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.
+
+config PVPANIC_PCI
+	tristate "pvpanic pci device support"
+	depends on PCI
+	select PVPANIC
+	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
index d08379b..fe57d1f 100644
--- a/drivers/misc/pvpanic/Makefile
+++ b/drivers/misc/pvpanic/Makefile
@@ -1,2 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for pvpanic device.
+#
+
+
 obj-$(CONFIG_PVPANIC)		+= pvpanic.o
 obj-$(CONFIG_PVPANIC_MMIO)	+= pvpanic-mmio.o
+obj-$(CONFIG_PVPANIC_PCI)	+= pvpanic-pci.o
diff --git a/drivers/misc/pvpanic/pvpanic-pci.c b/drivers/misc/pvpanic/pvpanic-pci.c
new file mode 100644
index 00000000..1d25d11
--- /dev/null
+++ b/drivers/misc/pvpanic/pvpanic-pci.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  pvpanic pci driver.
+ *
+ *  Copyright (C) 2021 Oracle.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/types.h>
+#include "pvpanic.h"
+
+#define PCI_VENDOR_ID_REDHAT             0x1b36
+#define PCI_DEVICE_ID_REDHAT_PVPANIC     0x0011
+
+static const struct pci_device_id pvpanic_pci_id_tbl[]  = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_REDHAT, PCI_DEVICE_ID_REDHAT_PVPANIC),},
+	{}
+};
+
+static int pvpanic_pci_probe(struct pci_dev *pdev,
+			     const struct pci_device_id *ent)
+{
+	int ret;
+	struct resource res;
+	void __iomem *base;
+
+	ret = pcim_enable_device(pdev);
+	if (ret < 0)
+		return ret;
+
+	base = pci_iomap(pdev, 0, 0);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	pvpanic_probe(base);
+
+	return 0;
+}
+
+static void pvpanic_pci_remove(struct pci_dev *pdev)
+{
+	pvpanic_remove();
+}
+
+static struct pci_driver pvpanic_pci_driver = {
+	.name =         "pvpanic-pci",
+	.id_table =     pvpanic_pci_id_tbl,
+	.probe =        pvpanic_pci_probe,
+	.remove =       pvpanic_pci_remove,
+};
+
+module_pci_driver(pvpanic_pci_driver);
-- 
1.8.3.1