Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 565 insertions, 0 deletions

diff --git a/drivers/net/ethernet/sunplus/spl2sw_driver.c b/drivers/net/ethernet/sunplus/spl2sw_driver.c
new file mode 100644
index 000000000..c499a1431
--- /dev/null
+++ b/drivers/net/ethernet/sunplus/spl2sw_driver.c
@@ -0,0 +1,565 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright Sunplus Technology Co., Ltd.
+ *       All rights reserved.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/etherdevice.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <linux/of_net.h>
+#include <linux/reset.h>
+#include <linux/clk.h>
+#include <linux/of.h>
+
+#include "spl2sw_register.h"
+#include "spl2sw_define.h"
+#include "spl2sw_desc.h"
+#include "spl2sw_mdio.h"
+#include "spl2sw_phy.h"
+#include "spl2sw_int.h"
+#include "spl2sw_mac.h"
+
+/* net device operations */
+static int spl2sw_ethernet_open(struct net_device *ndev)
+{
+	struct spl2sw_mac *mac = netdev_priv(ndev);
+	struct spl2sw_common *comm = mac->comm;
+	u32 mask;
+
+	netdev_dbg(ndev, "Open port = %x\n", mac->lan_port);
+
+	comm->enable |= mac->lan_port;
+
+	spl2sw_mac_hw_start(comm);
+
+	/* Enable TX and RX interrupts */
+	mask = readl(comm->l2sw_reg_base + L2SW_SW_INT_MASK_0);
+	mask &= ~(MAC_INT_TX | MAC_INT_RX);
+	writel(mask, comm->l2sw_reg_base + L2SW_SW_INT_MASK_0);
+
+	phy_start(ndev->phydev);
+
+	netif_start_queue(ndev);
+
+	return 0;
+}
+
+static int spl2sw_ethernet_stop(struct net_device *ndev)
+{
+	struct spl2sw_mac *mac = netdev_priv(ndev);
+	struct spl2sw_common *comm = mac->comm;
+
+	netif_stop_queue(ndev);
+
+	comm->enable &= ~mac->lan_port;
+
+	phy_stop(ndev->phydev);
+
+	spl2sw_mac_hw_stop(comm);
+
+	return 0;
+}
+
+static netdev_tx_t spl2sw_ethernet_start_xmit(struct sk_buff *skb,
+					      struct net_device *ndev)
+{
+	struct spl2sw_mac *mac = netdev_priv(ndev);
+	struct spl2sw_common *comm = mac->comm;
+	struct spl2sw_skb_info *skbinfo;
+	struct spl2sw_mac_desc *txdesc;
+	unsigned long flags;
+	u32 mapping;
+	u32 tx_pos;
+	u32 cmd1;
+	u32 cmd2;
+
+	if (unlikely(comm->tx_desc_full == 1)) {
+		/* No TX descriptors left. Wait for tx interrupt. */
+		netdev_dbg(ndev, "TX descriptor queue full when xmit!\n");
+		return NETDEV_TX_BUSY;
+	}
+
+	/* If skb size is shorter than ETH_ZLEN (60), pad it with 0. */
+	if (unlikely(skb->len < ETH_ZLEN)) {
+		if (skb_padto(skb, ETH_ZLEN))
+			return NETDEV_TX_OK;
+
+		skb_put(skb, ETH_ZLEN - skb->len);
+	}
+
+	mapping = dma_map_single(&comm->pdev->dev, skb->data,
+				 skb->len, DMA_TO_DEVICE);
+	if (dma_mapping_error(&comm->pdev->dev, mapping)) {
+		ndev->stats.tx_errors++;
+		dev_kfree_skb(skb);
+		return NETDEV_TX_OK;
+	}
+
+	spin_lock_irqsave(&comm->tx_lock, flags);
+
+	tx_pos = comm->tx_pos;
+	txdesc = &comm->tx_desc[tx_pos];
+	skbinfo = &comm->tx_temp_skb_info[tx_pos];
+	skbinfo->mapping = mapping;
+	skbinfo->len = skb->len;
+	skbinfo->skb = skb;
+
+	/* Set up a TX descriptor */
+	cmd1 = TXD_OWN | TXD_SOP | TXD_EOP | (mac->to_vlan << 12) |
+	       (skb->len & TXD_PKT_LEN);
+	cmd2 = skb->len & TXD_BUF_LEN1;
+
+	if (tx_pos == (TX_DESC_NUM - 1))
+		cmd2 |= TXD_EOR;
+
+	txdesc->addr1 = skbinfo->mapping;
+	txdesc->cmd2 = cmd2;
+	wmb();	/* Set TXD_OWN after other fields are effective. */
+	txdesc->cmd1 = cmd1;
+
+	/* Move tx_pos to next position */
+	tx_pos = ((tx_pos + 1) == TX_DESC_NUM) ? 0 : tx_pos + 1;
+
+	if (unlikely(tx_pos == comm->tx_done_pos)) {
+		netif_stop_queue(ndev);
+		comm->tx_desc_full = 1;
+	}
+	comm->tx_pos = tx_pos;
+	wmb();		/* make sure settings are effective. */
+
+	/* Trigger mac to transmit */
+	writel(MAC_TRIG_L_SOC0, comm->l2sw_reg_base + L2SW_CPU_TX_TRIG);
+
+	spin_unlock_irqrestore(&comm->tx_lock, flags);
+	return NETDEV_TX_OK;
+}
+
+static void spl2sw_ethernet_set_rx_mode(struct net_device *ndev)
+{
+	struct spl2sw_mac *mac = netdev_priv(ndev);
+
+	spl2sw_mac_rx_mode_set(mac);
+}
+
+static int spl2sw_ethernet_set_mac_address(struct net_device *ndev, void *addr)
+{
+	struct spl2sw_mac *mac = netdev_priv(ndev);
+	int err;
+
+	err = eth_mac_addr(ndev, addr);
+	if (err)
+		return err;
+
+	/* Delete the old MAC address */
+	netdev_dbg(ndev, "Old Ethernet (MAC) address = %pM\n", mac->mac_addr);
+	if (is_valid_ether_addr(mac->mac_addr)) {
+		err = spl2sw_mac_addr_del(mac);
+		if (err)
+			return err;
+	}
+
+	/* Set the MAC address */
+	ether_addr_copy(mac->mac_addr, ndev->dev_addr);
+	return spl2sw_mac_addr_add(mac);
+}
+
+static void spl2sw_ethernet_tx_timeout(struct net_device *ndev, unsigned int txqueue)
+{
+	struct spl2sw_mac *mac = netdev_priv(ndev);
+	struct spl2sw_common *comm = mac->comm;
+	unsigned long flags;
+	int i;
+
+	netdev_err(ndev, "TX timed out!\n");
+	ndev->stats.tx_errors++;
+
+	spin_lock_irqsave(&comm->tx_lock, flags);
+
+	for (i = 0; i < MAX_NETDEV_NUM; i++)
+		if (comm->ndev[i])
+			netif_stop_queue(comm->ndev[i]);
+
+	spl2sw_mac_soft_reset(comm);
+
+	/* Accept TX packets again. */
+	for (i = 0; i < MAX_NETDEV_NUM; i++)
+		if (comm->ndev[i]) {
+			netif_trans_update(comm->ndev[i]);
+			netif_wake_queue(comm->ndev[i]);
+		}
+
+	spin_unlock_irqrestore(&comm->tx_lock, flags);
+}
+
+static const struct net_device_ops netdev_ops = {
+	.ndo_open = spl2sw_ethernet_open,
+	.ndo_stop = spl2sw_ethernet_stop,
+	.ndo_start_xmit = spl2sw_ethernet_start_xmit,
+	.ndo_set_rx_mode = spl2sw_ethernet_set_rx_mode,
+	.ndo_set_mac_address = spl2sw_ethernet_set_mac_address,
+	.ndo_do_ioctl = phy_do_ioctl,
+	.ndo_tx_timeout = spl2sw_ethernet_tx_timeout,
+};
+
+static void spl2sw_check_mac_vendor_id_and_convert(u8 *mac_addr)
+{
+	/* Byte order of MAC address of some samples are reversed.
+	 * Check vendor id and convert byte order if it is wrong.
+	 * OUI of Sunplus: fc:4b:bc
+	 */
+	if (mac_addr[5] == 0xfc && mac_addr[4] == 0x4b && mac_addr[3] == 0xbc &&
+	    (mac_addr[0] != 0xfc || mac_addr[1] != 0x4b || mac_addr[2] != 0xbc)) {
+
+		swap(mac_addr[0], mac_addr[5]);
+		swap(mac_addr[1], mac_addr[4]);
+		swap(mac_addr[2], mac_addr[3]);
+	}
+}
+
+static int spl2sw_nvmem_get_mac_address(struct device *dev, struct device_node *np,
+					void *addrbuf)
+{
+	struct nvmem_cell *cell;
+	ssize_t len;
+	u8 *mac;
+
+	/* Get nvmem cell of mac-address from dts. */
+	cell = of_nvmem_cell_get(np, "mac-address");
+	if (IS_ERR(cell))
+		return PTR_ERR(cell);
+
+	/* Read mac address from nvmem cell. */
+	mac = nvmem_cell_read(cell, &len);
+	nvmem_cell_put(cell);
+	if (IS_ERR(mac))
+		return PTR_ERR(mac);
+
+	if (len != ETH_ALEN) {
+		kfree(mac);
+		dev_info(dev, "Invalid length of mac address in nvmem!\n");
+		return -EINVAL;
+	}
+
+	/* Byte order of some samples are reversed.
+	 * Convert byte order here.
+	 */
+	spl2sw_check_mac_vendor_id_and_convert(mac);
+
+	/* Check if mac address is valid */
+	if (!is_valid_ether_addr(mac)) {
+		dev_info(dev, "Invalid mac address in nvmem (%pM)!\n", mac);
+		kfree(mac);
+		return -EINVAL;
+	}
+
+	ether_addr_copy(addrbuf, mac);
+	kfree(mac);
+	return 0;
+}
+
+static u32 spl2sw_init_netdev(struct platform_device *pdev, u8 *mac_addr,
+			      struct net_device **r_ndev)
+{
+	struct net_device *ndev;
+	struct spl2sw_mac *mac;
+	int ret;
+
+	/* Allocate the devices, and also allocate spl2sw_mac,
+	 * we can get it by netdev_priv().
+	 */
+	ndev = devm_alloc_etherdev(&pdev->dev, sizeof(*mac));
+	if (!ndev) {
+		*r_ndev = NULL;
+		return -ENOMEM;
+	}
+	SET_NETDEV_DEV(ndev, &pdev->dev);
+	ndev->netdev_ops = &netdev_ops;
+	mac = netdev_priv(ndev);
+	mac->ndev = ndev;
+	ether_addr_copy(mac->mac_addr, mac_addr);
+
+	eth_hw_addr_set(ndev, mac_addr);
+	dev_info(&pdev->dev, "Ethernet (MAC) address = %pM\n", mac_addr);
+
+	ret = register_netdev(ndev);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to register net device \"%s\"!\n",
+			ndev->name);
+		*r_ndev = NULL;
+		return ret;
+	}
+	netdev_dbg(ndev, "Registered net device \"%s\" successfully.\n", ndev->name);
+
+	*r_ndev = ndev;
+	return 0;
+}
+
+static struct device_node *spl2sw_get_eth_child_node(struct device_node *ether_np, int id)
+{
+	struct device_node *port_np;
+	int port_id;
+
+	for_each_child_of_node(ether_np, port_np) {
+		/* It is not a 'port' node, continue. */
+		if (strcmp(port_np->name, "port"))
+			continue;
+
+		if (of_property_read_u32(port_np, "reg", &port_id) < 0)
+			continue;
+
+		if (port_id == id)
+			return port_np;
+	}
+
+	/* Not found! */
+	return NULL;
+}
+
+static int spl2sw_probe(struct platform_device *pdev)
+{
+	struct device_node *eth_ports_np;
+	struct device_node *port_np;
+	struct spl2sw_common *comm;
+	struct device_node *phy_np;
+	phy_interface_t phy_mode;
+	struct net_device *ndev;
+	struct spl2sw_mac *mac;
+	u8 mac_addr[ETH_ALEN];
+	int irq, i, ret;
+
+	if (platform_get_drvdata(pdev))
+		return -ENODEV;
+
+	/* Allocate memory for 'spl2sw_common' area. */
+	comm = devm_kzalloc(&pdev->dev, sizeof(*comm), GFP_KERNEL);
+	if (!comm)
+		return -ENOMEM;
+
+	comm->pdev = pdev;
+	platform_set_drvdata(pdev, comm);
+
+	spin_lock_init(&comm->tx_lock);
+	spin_lock_init(&comm->mdio_lock);
+	spin_lock_init(&comm->int_mask_lock);
+
+	/* Get memory resource 0 from dts. */
+	comm->l2sw_reg_base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(comm->l2sw_reg_base))
+		return PTR_ERR(comm->l2sw_reg_base);
+
+	/* Get irq resource from dts. */
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
+		return ret;
+	irq = ret;
+
+	/* Get clock controller. */
+	comm->clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(comm->clk)) {
+		dev_err_probe(&pdev->dev, PTR_ERR(comm->clk),
+			      "Failed to retrieve clock controller!\n");
+		return PTR_ERR(comm->clk);
+	}
+
+	/* Get reset controller. */
+	comm->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
+	if (IS_ERR(comm->rstc)) {
+		dev_err_probe(&pdev->dev, PTR_ERR(comm->rstc),
+			      "Failed to retrieve reset controller!\n");
+		return PTR_ERR(comm->rstc);
+	}
+
+	/* Enable clock. */
+	ret = clk_prepare_enable(comm->clk);
+	if (ret)
+		return ret;
+	udelay(1);
+
+	/* Reset MAC */
+	reset_control_assert(comm->rstc);
+	udelay(1);
+	reset_control_deassert(comm->rstc);
+	usleep_range(1000, 2000);
+
+	/* Request irq. */
+	ret = devm_request_irq(&pdev->dev, irq, spl2sw_ethernet_interrupt, 0,
+			       dev_name(&pdev->dev), comm);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to request irq #%d!\n", irq);
+		goto out_clk_disable;
+	}
+
+	/* Initialize TX and RX descriptors. */
+	ret = spl2sw_descs_init(comm);
+	if (ret) {
+		dev_err(&pdev->dev, "Fail to initialize mac descriptors!\n");
+		spl2sw_descs_free(comm);
+		goto out_clk_disable;
+	}
+
+	/* Initialize MAC. */
+	spl2sw_mac_init(comm);
+
+	/* Initialize mdio bus */
+	ret = spl2sw_mdio_init(comm);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to initialize mdio bus!\n");
+		goto out_clk_disable;
+	}
+
+	/* Get child node ethernet-ports. */
+	eth_ports_np = of_get_child_by_name(pdev->dev.of_node, "ethernet-ports");
+	if (!eth_ports_np) {
+		dev_err(&pdev->dev, "No ethernet-ports child node found!\n");
+		ret = -ENODEV;
+		goto out_free_mdio;
+	}
+
+	for (i = 0; i < MAX_NETDEV_NUM; i++) {
+		/* Get port@i of node ethernet-ports. */
+		port_np = spl2sw_get_eth_child_node(eth_ports_np, i);
+		if (!port_np)
+			continue;
+
+		/* Get phy-mode. */
+		if (of_get_phy_mode(port_np, &phy_mode)) {
+			dev_err(&pdev->dev, "Failed to get phy-mode property of port@%d!\n",
+				i);
+			continue;
+		}
+
+		/* Get phy-handle. */
+		phy_np = of_parse_phandle(port_np, "phy-handle", 0);
+		if (!phy_np) {
+			dev_err(&pdev->dev, "Failed to get phy-handle property of port@%d!\n",
+				i);
+			continue;
+		}
+
+		/* Get mac-address from nvmem. */
+		ret = spl2sw_nvmem_get_mac_address(&pdev->dev, port_np, mac_addr);
+		if (ret == -EPROBE_DEFER) {
+			goto out_unregister_dev;
+		} else if (ret) {
+			dev_info(&pdev->dev, "Generate a random mac address!\n");
+			eth_random_addr(mac_addr);
+		}
+
+		/* Initialize the net device. */
+		ret = spl2sw_init_netdev(pdev, mac_addr, &ndev);
+		if (ret)
+			goto out_unregister_dev;
+
+		ndev->irq = irq;
+		comm->ndev[i] = ndev;
+		mac = netdev_priv(ndev);
+		mac->phy_node = phy_np;
+		mac->phy_mode = phy_mode;
+		mac->comm = comm;
+
+		mac->lan_port = 0x1 << i;	/* forward to port i */
+		mac->to_vlan = 0x1 << i;	/* vlan group: i     */
+		mac->vlan_id = i;		/* vlan group: i     */
+
+		/* Set MAC address */
+		ret = spl2sw_mac_addr_add(mac);
+		if (ret)
+			goto out_unregister_dev;
+
+		spl2sw_mac_rx_mode_set(mac);
+	}
+
+	/* Find first valid net device. */
+	for (i = 0; i < MAX_NETDEV_NUM; i++) {
+		if (comm->ndev[i])
+			break;
+	}
+	if (i >= MAX_NETDEV_NUM) {
+		dev_err(&pdev->dev, "No valid ethernet port!\n");
+		ret = -ENODEV;
+		goto out_free_mdio;
+	}
+
+	/* Save first valid net device */
+	ndev = comm->ndev[i];
+
+	ret = spl2sw_phy_connect(comm);
+	if (ret) {
+		netdev_err(ndev, "Failed to connect phy!\n");
+		goto out_unregister_dev;
+	}
+
+	/* Add and enable napi. */
+	netif_napi_add(ndev, &comm->rx_napi, spl2sw_rx_poll);
+	napi_enable(&comm->rx_napi);
+	netif_napi_add_tx(ndev, &comm->tx_napi, spl2sw_tx_poll);
+	napi_enable(&comm->tx_napi);
+	return 0;
+
+out_unregister_dev:
+	for (i = 0; i < MAX_NETDEV_NUM; i++)
+		if (comm->ndev[i])
+			unregister_netdev(comm->ndev[i]);
+
+out_free_mdio:
+	spl2sw_mdio_remove(comm);
+
+out_clk_disable:
+	clk_disable_unprepare(comm->clk);
+	return ret;
+}
+
+static int spl2sw_remove(struct platform_device *pdev)
+{
+	struct spl2sw_common *comm;
+	int i;
+
+	comm = platform_get_drvdata(pdev);
+
+	spl2sw_phy_remove(comm);
+
+	/* Unregister and free net device. */
+	for (i = 0; i < MAX_NETDEV_NUM; i++)
+		if (comm->ndev[i])
+			unregister_netdev(comm->ndev[i]);
+
+	comm->enable = 0;
+	spl2sw_mac_hw_stop(comm);
+	spl2sw_descs_free(comm);
+
+	/* Disable and delete napi. */
+	napi_disable(&comm->rx_napi);
+	netif_napi_del(&comm->rx_napi);
+	napi_disable(&comm->tx_napi);
+	netif_napi_del(&comm->tx_napi);
+
+	spl2sw_mdio_remove(comm);
+
+	clk_disable_unprepare(comm->clk);
+
+	return 0;
+}
+
+static const struct of_device_id spl2sw_of_match[] = {
+	{.compatible = "sunplus,sp7021-emac"},
+	{ /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, spl2sw_of_match);
+
+static struct platform_driver spl2sw_driver = {
+	.probe = spl2sw_probe,
+	.remove = spl2sw_remove,
+	.driver = {
+		.name = "sp7021_emac",
+		.of_match_table = spl2sw_of_match,
+	},
+};
+
+module_platform_driver(spl2sw_driver);
+
+MODULE_AUTHOR("Wells Lu <wellslutw@gmail.com>");
+MODULE_DESCRIPTION("Sunplus Dual 10M/100M Ethernet driver");
+MODULE_LICENSE("GPL");