ionic: add support for device id 0x1004

Add support for the management port device id.  This is to
capture the device and set it up for devlink use, but not set
it up for network operations.  We still use a netdev object
in order to use the napi infrasucture for processing adminq
and notifyq messages, we just don't register the netdev.

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

4 files changed, 19 insertions, 2 deletions

diff --git a/drivers/net/ethernet/pensando/ionic/ionic.h b/drivers/net/ethernet/pensando/ionic/ionic.h
index bb106a32f416..59f8385d591f 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic.h
@@ -18,6 +18,7 @@ struct ionic_lif;
 
 #define PCI_DEVICE_ID_PENSANDO_IONIC_ETH_PF	0x1002
 #define PCI_DEVICE_ID_PENSANDO_IONIC_ETH_VF	0x1003
+#define PCI_DEVICE_ID_PENSANDO_IONIC_ETH_MGMT	0x1004
 
 #define DEVCMD_TIMEOUT  10
 
@@ -42,6 +43,7 @@ struct ionic {
 	struct dentry *dentry;
 	struct ionic_dev_bar bars[IONIC_BARS_MAX];
 	unsigned int num_bars;
+	bool is_mgmt_nic;
 	struct ionic_identity ident;
 	struct list_head lifs;
 	struct ionic_lif *master_lif;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
index 2924cde440aa..60fc191a35e5 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
@@ -15,6 +15,7 @@
 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) },
+	{ PCI_VDEVICE(PENSANDO, PCI_DEVICE_ID_PENSANDO_IONIC_ETH_MGMT) },
 	{ 0, }	/* end of table */
 };
 MODULE_DEVICE_TABLE(pci, ionic_id_table);
@@ -224,6 +225,9 @@ static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	pci_set_drvdata(pdev, ionic);
 	mutex_init(&ionic->dev_cmd_lock);
 
+	ionic->is_mgmt_nic =
+		ent->device == PCI_DEVICE_ID_PENSANDO_IONIC_ETH_MGMT;
+
 	/* Query system for DMA addressing limitation for the device. */
 	err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(IONIC_ADDR_LEN));
 	if (err) {
@@ -248,7 +252,8 @@ static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	}
 
 	pci_set_master(pdev);
-	pcie_print_link_status(pdev);
+	if (!ionic->is_mgmt_nic)
+		pcie_print_link_status(pdev);
 
 	err = ionic_map_bars(ionic);
 	if (err)
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_devlink.c b/drivers/net/ethernet/pensando/ionic/ionic_devlink.c
index 6fb27dcc5787..ed14164468a1 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_devlink.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_devlink.c
@@ -82,7 +82,7 @@ int ionic_devlink_register(struct ionic *ionic)
 	err = devlink_port_register(dl, &ionic->dl_port, 0);
 	if (err)
 		dev_err(ionic->dev, "devlink_port_register failed: %d\n", err);
-	else
+	else if (!ionic->is_mgmt_nic)
 		devlink_port_type_eth_set(&ionic->dl_port,
 					  ionic->master_lif->netdev);
 
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index 4b953f9e9084..aaf4a40fa98b 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -1155,6 +1155,10 @@ static int ionic_init_nic_features(struct ionic_lif *lif)
 	netdev_features_t features;
 	int err;
 
+	/* no netdev features on the management device */
+	if (lif->ionic->is_mgmt_nic)
+		return 0;
+
 	/* set up what we expect to support by default */
 	features = NETIF_F_HW_VLAN_CTAG_TX |
 		   NETIF_F_HW_VLAN_CTAG_RX |
@@ -2383,6 +2387,12 @@ int ionic_lifs_register(struct ionic *ionic)
 {
 	int err;
 
+	/* the netdev is not registered on the management device, it is
+	 * only used as a vehicle for napi operations on the adminq
+	 */
+	if (ionic->is_mgmt_nic)
+		return 0;
+
 	INIT_WORK(&ionic->nb_work, ionic_lif_notify_work);
 
 	ionic->nb.notifier_call = ionic_lif_notify;