ionic: Add basic framework for IONIC Network device driver

This patch adds a basic driver framework for the Pensando IONIC
network device.  There is no functionality right now other than
the ability to load and unload.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c

@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2017 - 2019 Pensando Systems, Inc */
+
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/pci.h>
+
+#include "ionic.h"
+#include "ionic_bus.h"
+
+/* Supported devices */
+static const struct pci_device_id ionic_id_table[] = {
+	{ PCI_VDEVICE(PENSANDO, PCI_DEVICE_ID_PENSANDO_IONIC_ETH_PF) },
+	{ PCI_VDEVICE(PENSANDO, PCI_DEVICE_ID_PENSANDO_IONIC_ETH_VF) },
+	{ 0, }	/* end of table */
+};
+MODULE_DEVICE_TABLE(pci, ionic_id_table);
+
+static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	struct device *dev = &pdev->dev;
+	struct ionic *ionic;
+
+	ionic = ionic_devlink_alloc(dev);
+	if (!ionic)
+		return -ENOMEM;
+
+	ionic->pdev = pdev;
+	ionic->dev = dev;
+	pci_set_drvdata(pdev, ionic);
+
+	return 0;
+}
+
+static void ionic_remove(struct pci_dev *pdev)
+{
+	struct ionic *ionic = pci_get_drvdata(pdev);
+
+	ionic_devlink_free(ionic);
+}
+
+static struct pci_driver ionic_driver = {
+	.name = IONIC_DRV_NAME,
+	.id_table = ionic_id_table,
+	.probe = ionic_probe,
+	.remove = ionic_remove,
+};
+
+int ionic_bus_register_driver(void)
+{
+	return pci_register_driver(&ionic_driver);
+}
+
+void ionic_bus_unregister_driver(void)
+{
+	pci_unregister_driver(&ionic_driver);
+}