ionic: Add the basic NDO callbacks for netdev support

Set up the initial NDO structure and callbacks for netdev
to use, and register the netdev.  This will allow us to do
a few basic operations on the device, but no traffic yet.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/pensando/ionic/ionic.h

@@ -28,6 +28,7 @@ struct ionic_lif;
 struct ionic {
 	struct pci_dev *pdev;
 	struct device *dev;
+	struct devlink_port dl_port;
 	struct ionic_dev idev;
 	struct mutex dev_cmd_lock;	/* lock for dev_cmd operations */
 	struct dentry *dentry;
@@ -35,6 +36,7 @@ struct ionic {
 	unsigned int num_bars;
 	struct ionic_identity ident;
 	struct list_head lifs;
+	struct ionic_lif *master_lif;
 	unsigned int nnqs_per_lif;
 	unsigned int neqs_per_lif;
 	unsigned int ntxqs_per_lif;

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

@@ -206,12 +206,24 @@ static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto err_out_free_lifs;
 	}
 
+	err = ionic_lifs_register(ionic);
+	if (err) {
+		dev_err(dev, "Cannot register LIFs: %d, aborting\n", err);
+		goto err_out_deinit_lifs;
+	}
+
 	err = ionic_devlink_register(ionic);
-	if (err)
+	if (err) {
 		dev_err(dev, "Cannot register devlink: %d\n", err);
+		goto err_out_deregister_lifs;
+	}
 
 	return 0;
 
+err_out_deregister_lifs:
+	ionic_lifs_unregister(ionic);
+err_out_deinit_lifs:
+	ionic_lifs_deinit(ionic);
 err_out_free_lifs:
 	ionic_lifs_free(ionic);
 err_out_free_irqs:
@@ -246,6 +258,7 @@ static void ionic_remove(struct pci_dev *pdev)
 		return;
 
 	ionic_devlink_unregister(ionic);
+	ionic_lifs_unregister(ionic);
 	ionic_lifs_deinit(ionic);
 	ionic_lifs_free(ionic);
 	ionic_bus_free_irq_vectors(ionic);

drivers/net/ethernet/pensando/ionic/ionic_dev.h

@@ -10,6 +10,8 @@
 #include "ionic_if.h"
 #include "ionic_regs.h"
 
+#define IONIC_MIN_MTU			ETH_MIN_MTU
+#define IONIC_MAX_MTU			9194
 #define IONIC_LIFS_MAX			1024
 
 struct ionic_dev_bar {

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

@@ -6,6 +6,7 @@
 
 #include "ionic.h"
 #include "ionic_bus.h"
+#include "ionic_lif.h"
 #include "ionic_devlink.h"
 
 static int ionic_dl_info_get(struct devlink *dl, struct devlink_info_req *req,
@@ -72,8 +73,19 @@ int ionic_devlink_register(struct ionic *ionic)
 	int err;
 
 	err = devlink_register(dl, ionic->dev);
-	if (err)
+	if (err) {
 		dev_warn(ionic->dev, "devlink_register failed: %d\n", err);
+		return err;
+	}
+
+	devlink_port_attrs_set(&ionic->dl_port, DEVLINK_PORT_FLAVOUR_PHYSICAL,
+			       0, false, 0, NULL, 0);
+	err = devlink_port_register(dl, &ionic->dl_port, 0);
+	if (err)
+		dev_err(ionic->dev, "devlink_port_register failed: %d\n", err);
+	else
+		devlink_port_type_eth_set(&ionic->dl_port,
+					  ionic->master_lif->netdev);
 
 	return err;
 }
@@ -82,5 +94,6 @@ void ionic_devlink_unregister(struct ionic *ionic)
 {
 	struct devlink *dl = priv_to_devlink(ionic);
 
+	devlink_port_unregister(&ionic->dl_port);
 	devlink_unregister(dl);
 }

drivers/net/ethernet/pensando/ionic/ionic_lif.h

@@ -59,6 +59,8 @@ struct ionic_qcq {
 
 enum ionic_lif_state_flags {
 	IONIC_LIF_INITED,
+	IONIC_LIF_UP,
+	IONIC_LIF_QUEUE_RESET,
 
 	/* leave this as last */
 	IONIC_LIF_STATE_SIZE
@@ -82,6 +84,7 @@ struct ionic_lif {
 	u64 last_eid;
 	unsigned int neqs;
 	unsigned int nxqs;
+	u64 hw_features;
 
 	struct ionic_lif_info *info;
 	dma_addr_t info_pa;
@@ -93,14 +96,31 @@ struct ionic_lif {
 	u32 flags;
 };
 
+static inline int ionic_wait_for_bit(struct ionic_lif *lif, int bitname)
+{
+	unsigned long tlimit = jiffies + HZ;
+
+	while (test_and_set_bit(bitname, lif->state) &&
+	       time_before(jiffies, tlimit))
+		usleep_range(100, 200);
+
+	return test_bit(bitname, lif->state);
+}
+
 int ionic_lifs_alloc(struct ionic *ionic);
 void ionic_lifs_free(struct ionic *ionic);
 void ionic_lifs_deinit(struct ionic *ionic);
 int ionic_lifs_init(struct ionic *ionic);
+int ionic_lifs_register(struct ionic *ionic);
+void ionic_lifs_unregister(struct ionic *ionic);
 int ionic_lif_identify(struct ionic *ionic, u8 lif_type,
 		       union ionic_lif_identity *lif_ident);
 int ionic_lifs_size(struct ionic *ionic);
 
+int ionic_open(struct net_device *netdev);
+int ionic_stop(struct net_device *netdev);
+int ionic_reset_queues(struct ionic_lif *lif);
+
 static inline void debug_stats_napi_poll(struct ionic_qcq *qcq,
 					 unsigned int work_done)
 {