linux-kernel - [PATCH 4/4] misc/pvpanic: add new pvpanic pci driver

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Message-Id: <1603971787-16784-5-git-send-email-mihai.carabas@oracle.com>
Date:   Thu, 29 Oct 2020 13:43:07 +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 4/4] misc/pvpanic: add new pvpanic pci driver

From: Peng Hao <peng.hao2@....com.cn>

Add new pvpanic pci driver to pvpanic driver framework.

Signed-off-by: Peng Hao <peng.hao2@....com.cn>
Signed-off-by: Mihai Carabas <mihai.carabas@...cle.com>
---
 drivers/misc/pvpanic/Kconfig       | 10 ++++++-
 drivers/misc/pvpanic/Makefile      |  1 +
 drivers/misc/pvpanic/pvpanic-pci.c | 56 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 66 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 0c0c0b2..866cb37 100644
--- a/drivers/misc/pvpanic/Kconfig
+++ b/drivers/misc/pvpanic/Kconfig
@@ -1,6 +1,6 @@
 config PVPANIC
 	tristate "pvpanic device support"
-	depends on HAS_IOMEM && (ACPI || OF)
+	depends on HAS_IOMEM && (ACPI || OF || PCI)
 	help
 	  This driver provides support for the pvpanic device.  pvpanic is
 	  a paravirtualized device provided by QEMU; it lets a virtual machine
@@ -23,4 +23,12 @@ config PVPANIC_OF
 	  This driver is one specific driver for pvpanic driver framework.
 	  It provides a mmio device as pvpanic device.
 
+config PVPANIC_PCI
+	tristate "pvpanic pci driver"
+	depends on PCI
+	default PVPANIC
+	help
+	  This driver is one specific driver for pvpanic driver framework.
+	  It provides a pci device as pvpanic device.
+
 endif
diff --git a/drivers/misc/pvpanic/Makefile b/drivers/misc/pvpanic/Makefile
index ffd11b1..45d0a60 100644
--- a/drivers/misc/pvpanic/Makefile
+++ b/drivers/misc/pvpanic/Makefile
@@ -5,3 +5,4 @@
 obj-$(CONFIG_PVPANIC)            += pvpanic.o
 obj-$(CONFIG_PVPANIC_ACPI)       += pvpanic-acpi.o
 obj-$(CONFIG_PVPANIC_OF)         += pvpanic-of.o
+obj-$(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..1261710
--- /dev/null
+++ b/drivers/misc/pvpanic/pvpanic-pci.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  pvpanic acpi driver.
+ *
+ *  Copyright (C) 2019 ZTE Ltd.
+ *  Author: Peng Hao <peng.hao2@....com.cn>
+ */
+
+#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     0x0101
+
+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;
+
+	ret = pcim_enable_device(pdev);
+	if (ret < 0)
+		return ret;
+
+	memset(&res, 0, sizeof(res));
+	res.start = pci_resource_start(pdev, 0);
+	res.end = pci_resource_end(pdev, 0);
+	res.flags = IORESOURCE_MEM;
+	ret = pvpanic_add_device(&pdev->dev, &res);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static void pvpanic_pci_remove(struct pci_dev *pdev)
+{
+	pvpanic_remove_device();
+}
+
+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