Merge branch 'dpaa2-eth-Move-DPAA2-Ethernet-driver'

Ioana Radulescu says:

====================
dpaa2-eth: Move DPAA2 Ethernet driver

The Freescale/NXP DPAA2 Ethernet driver was first included in
drivers/staging, due to its dependencies on two components located
there at the time of its initial submission:
* the fsl-mc bus driver, which was moved to drivers/bus in kernel 4.17
* the dpio driver, which was moved to drivers/soc/fsl in kernel 4.18

More information on the DPAA2 architecture and the interactions
between the fsl-mc bus and the objects present on it can be found in:
Documentation/networking/dpaa2/overview.rst

For easier review, the patch is generated without the -M option,
although the driver files are moved without any code changes.

changes since v1[1]:
* remove RFC label, since dependencies have been merged on net-next
* add patch fixing a possible race at probe (reported by Andrew Lunn)

[1] https://lore.kernel.org/patchwork/patch/971333/
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Documentation/networking/dpaa2/index.rst

@@ -7,3 +7,4 @@ DPAA2 Documentation
 
    overview
    dpio-driver
+   ethernet-driver

MAINTAINERS

@@ -4527,9 +4527,9 @@ F:	drivers/soc/fsl/dpio
 
 DPAA2 ETHERNET DRIVER
 M:	Ioana Radulescu <ruxandra.radulescu@nxp.com>
-L:	linux-kernel@vger.kernel.org
+L:	netdev@vger.kernel.org
 S:	Maintained
-F:	drivers/staging/fsl-dpaa2/ethernet
+F:	drivers/net/ethernet/freescale/dpaa2
 
 DPAA2 ETHERNET SWITCH DRIVER
 M:	Ioana Radulescu <ruxandra.radulescu@nxp.com>

drivers/net/ethernet/freescale/Kconfig

@@ -97,4 +97,12 @@ config GIANFAR
 
 source "drivers/net/ethernet/freescale/dpaa/Kconfig"
 
+config FSL_DPAA2_ETH
+	tristate "Freescale DPAA2 Ethernet"
+	depends on FSL_MC_BUS && FSL_MC_DPIO
+	depends on NETDEVICES && ETHERNET
+	---help---
+	  Ethernet driver for Freescale DPAA2 SoCs, using the
+	  Freescale MC bus driver
+
 endif # NET_VENDOR_FREESCALE

drivers/net/ethernet/freescale/Makefile

@@ -21,3 +21,5 @@ ucc_geth_driver-objs := ucc_geth.o ucc_geth_ethtool.o
 
 obj-$(CONFIG_FSL_FMAN) += fman/
 obj-$(CONFIG_FSL_DPAA_ETH) += dpaa/
+
+obj-$(CONFIG_FSL_DPAA2_ETH) += dpaa2/

drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c → drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c

@@ -1143,34 +1143,6 @@ static int dpaa2_eth_stop(struct net_device *net_dev)
 	return 0;
 }
 
-static int dpaa2_eth_init(struct net_device *net_dev)
-{
-	u64 supported = 0;
-	u64 not_supported = 0;
-	struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
-	u32 options = priv->dpni_attrs.options;
-
-	/* Capabilities listing */
-	supported |= IFF_LIVE_ADDR_CHANGE;
-
-	if (options & DPNI_OPT_NO_MAC_FILTER)
-		not_supported |= IFF_UNICAST_FLT;
-	else
-		supported |= IFF_UNICAST_FLT;
-
-	net_dev->priv_flags |= supported;
-	net_dev->priv_flags &= ~not_supported;
-
-	/* Features */
-	net_dev->features = NETIF_F_RXCSUM |
-			    NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
-			    NETIF_F_SG | NETIF_F_HIGHDMA |
-			    NETIF_F_LLTX;
-	net_dev->hw_features = net_dev->features;
-
-	return 0;
-}
-
 static int dpaa2_eth_set_addr(struct net_device *net_dev, void *addr)
 {
 	struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
@@ -1418,7 +1390,6 @@ static const struct net_device_ops dpaa2_eth_ops = {
 	.ndo_open = dpaa2_eth_open,
 	.ndo_start_xmit = dpaa2_eth_tx,
 	.ndo_stop = dpaa2_eth_stop,
-	.ndo_init = dpaa2_eth_init,
 	.ndo_set_mac_address = dpaa2_eth_set_addr,
 	.ndo_get_stats64 = dpaa2_eth_get_stats,
 	.ndo_set_rx_mode = dpaa2_eth_set_rx_mode,
@@ -2316,11 +2287,14 @@ static int netdev_init(struct net_device *net_dev)
 {
 	struct device *dev = net_dev->dev.parent;
 	struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
+	u32 options = priv->dpni_attrs.options;
+	u64 supported = 0, not_supported = 0;
 	u8 bcast_addr[ETH_ALEN];
 	u8 num_queues;
 	int err;
 
 	net_dev->netdev_ops = &dpaa2_eth_ops;
+	net_dev->ethtool_ops = &dpaa2_ethtool_ops;
 
 	err = set_mac_addr(priv);
 	if (err)
@@ -2356,12 +2330,23 @@ static int netdev_init(struct net_device *net_dev)
 		return err;
 	}
 
-	/* Our .ndo_init will be called herein */
-	err = register_netdev(net_dev);
-	if (err < 0) {
-		dev_err(dev, "register_netdev() failed\n");
-		return err;
-	}
+	/* Capabilities listing */
+	supported |= IFF_LIVE_ADDR_CHANGE;
+
+	if (options & DPNI_OPT_NO_MAC_FILTER)
+		not_supported |= IFF_UNICAST_FLT;
+	else
+		supported |= IFF_UNICAST_FLT;
+
+	net_dev->priv_flags |= supported;
+	net_dev->priv_flags &= ~not_supported;
+
+	/* Features */
+	net_dev->features = NETIF_F_RXCSUM |
+			    NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
+			    NETIF_F_SG | NETIF_F_HIGHDMA |
+			    NETIF_F_LLTX;
+	net_dev->hw_features = net_dev->features;
 
 	return 0;
 }
@@ -2561,28 +2546,36 @@ static int dpaa2_eth_probe(struct fsl_mc_device *dpni_dev)
 	if (err)
 		goto err_alloc_rings;
 
-	net_dev->ethtool_ops = &dpaa2_ethtool_ops;
-
 	err = setup_irqs(dpni_dev);
 	if (err) {
 		netdev_warn(net_dev, "Failed to set link interrupt, fall back to polling\n");
 		priv->poll_thread = kthread_run(poll_link_state, priv,
 						"%s_poll_link", net_dev->name);
 		if (IS_ERR(priv->poll_thread)) {
-			netdev_err(net_dev, "Error starting polling thread\n");
+			dev_err(dev, "Error starting polling thread\n");
 			goto err_poll_thread;
 		}
 		priv->do_link_poll = true;
 	}
 
+	err = register_netdev(net_dev);
+	if (err < 0) {
+		dev_err(dev, "register_netdev() failed\n");
+		goto err_netdev_reg;
+	}
+
 	dev_info(dev, "Probed interface %s\n", net_dev->name);
 	return 0;
 
+err_netdev_reg:
+	if (priv->do_link_poll)
+		kthread_stop(priv->poll_thread);
+	else
+		fsl_mc_free_irqs(dpni_dev);
 err_poll_thread:
 	free_rings(priv);
 err_alloc_rings:
 err_csum:
-	unregister_netdev(net_dev);
 err_netdev_init:
 	free_percpu(priv->percpu_extras);
 err_alloc_percpu_extras:

drivers/staging/fsl-dpaa2/Kconfig

@@ -9,14 +9,6 @@ config FSL_DPAA2
 	  Build drivers for Freescale DataPath Acceleration
 	  Architecture (DPAA2) family of SoCs.
 
-config FSL_DPAA2_ETH
-	tristate "Freescale DPAA2 Ethernet"
-	depends on FSL_DPAA2 && FSL_MC_DPIO
-	depends on NETDEVICES && ETHERNET
-	---help---
-	  Ethernet driver for Freescale DPAA2 SoCs, using the
-	  Freescale MC bus driver
-
 config FSL_DPAA2_ETHSW
 	tristate "Freescale DPAA2 Ethernet Switch"
 	depends on FSL_DPAA2

drivers/staging/fsl-dpaa2/Makefile

@@ -2,6 +2,5 @@
 # Freescale DataPath Acceleration Architecture Gen2 (DPAA2) drivers
 #
 
-obj-$(CONFIG_FSL_DPAA2_ETH)		+= ethernet/
 obj-$(CONFIG_FSL_DPAA2_ETHSW)		+= ethsw/
 obj-$(CONFIG_FSL_DPAA2_PTP_CLOCK)	+= rtc/

drivers/staging/fsl-dpaa2/ethernet/TODO

-* Add a DPAA2 MAC kernel driver in order to allow PHY management; currently
-  the DPMAC objects and their link to DPNIs are handled by MC internally
-  and all PHYs are seen as fixed-link
-* add more debug support: decide how to expose detailed debug statistics,
-  add ingress error queue support
-* MC firmware uprev; the DPAA2 objects used by the Ethernet driver need to
-  be kept in sync with binary interface changes in MC
-* refine README file
-* cleanup
-
-NOTE: None of the above is must-have before getting the DPAA2 Ethernet driver
-out of staging. The main requirement for that is to have the drivers it
-depends on, fsl-mc bus and DPIO driver, moved to drivers/bus and drivers/soc
-respectively.
-
- Please send any patches to Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
- ruxandra.radulescu@nxp.com, devel@driverdev.osuosl.org,
- linux-kernel@vger.kernel.org