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, 844 insertions, 0 deletions

diff --git a/drivers/net/wan/wanxl.c b/drivers/net/wan/wanxl.c
new file mode 100644
index 000000000..5a9e26218
--- /dev/null
+++ b/drivers/net/wan/wanxl.c
@@ -0,0 +1,844 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * wanXL serial card driver for Linux
+ * host part
+ *
+ * Copyright (C) 2003 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * Status:
+ *   - Only DTE (external clock) support with NRZ and NRZI encodings
+ *   - wanXL100 will require minor driver modifications, no access to hw
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/netdevice.h>
+#include <linux/hdlc.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+
+#include "wanxl.h"
+
+static const char *version = "wanXL serial card driver version: 0.48";
+
+#define PLX_CTL_RESET   0x40000000 /* adapter reset */
+
+#undef DEBUG_PKT
+#undef DEBUG_PCI
+
+/* MAILBOX #1 - PUTS COMMANDS */
+#define MBX1_CMD_ABORTJ 0x85000000 /* Abort and Jump */
+#ifdef __LITTLE_ENDIAN
+#define MBX1_CMD_BSWAP  0x8C000001 /* little-endian Byte Swap Mode */
+#else
+#define MBX1_CMD_BSWAP  0x8C000000 /* big-endian Byte Swap Mode */
+#endif
+
+/* MAILBOX #2 - DRAM SIZE */
+#define MBX2_MEMSZ_MASK 0xFFFF0000 /* PUTS Memory Size Register mask */
+
+struct port {
+	struct net_device *dev;
+	struct card *card;
+	spinlock_t lock;	/* for wanxl_xmit */
+	int node;		/* physical port #0 - 3 */
+	unsigned int clock_type;
+	int tx_in, tx_out;
+	struct sk_buff *tx_skbs[TX_BUFFERS];
+};
+
+struct card_status {
+	desc_t rx_descs[RX_QUEUE_LENGTH];
+	port_status_t port_status[4];
+};
+
+struct card {
+	int n_ports;		/* 1, 2 or 4 ports */
+	u8 irq;
+
+	u8 __iomem *plx;	/* PLX PCI9060 virtual base address */
+	struct pci_dev *pdev;	/* for pci_name(pdev) */
+	int rx_in;
+	struct sk_buff *rx_skbs[RX_QUEUE_LENGTH];
+	struct card_status *status;	/* shared between host and card */
+	dma_addr_t status_address;
+	struct port ports[];	/* 1 - 4 port structures follow */
+};
+
+static inline struct port *dev_to_port(struct net_device *dev)
+{
+	return (struct port *)dev_to_hdlc(dev)->priv;
+}
+
+static inline port_status_t *get_status(struct port *port)
+{
+	return &port->card->status->port_status[port->node];
+}
+
+#ifdef DEBUG_PCI
+static inline dma_addr_t pci_map_single_debug(struct pci_dev *pdev, void *ptr,
+					      size_t size, int direction)
+{
+	dma_addr_t addr = dma_map_single(&pdev->dev, ptr, size, direction);
+
+	if (addr + size > 0x100000000LL)
+		pr_crit("%s: pci_map_single() returned memory at 0x%llx!\n",
+			pci_name(pdev), (unsigned long long)addr);
+	return addr;
+}
+
+#undef pci_map_single
+#define pci_map_single pci_map_single_debug
+#endif
+
+/* Cable and/or personality module change interrupt service */
+static inline void wanxl_cable_intr(struct port *port)
+{
+	u32 value = get_status(port)->cable;
+	int valid = 1;
+	const char *cable, *pm, *dte = "", *dsr = "", *dcd = "";
+
+	switch (value & 0x7) {
+	case STATUS_CABLE_V35:
+		cable = "V.35";
+		break;
+	case STATUS_CABLE_X21:
+		cable = "X.21";
+		break;
+	case STATUS_CABLE_V24:
+		cable = "V.24";
+		break;
+	case STATUS_CABLE_EIA530:
+		cable = "EIA530";
+		break;
+	case STATUS_CABLE_NONE:
+		cable = "no";
+		break;
+	default:
+		cable = "invalid";
+	}
+
+	switch ((value >> STATUS_CABLE_PM_SHIFT) & 0x7) {
+	case STATUS_CABLE_V35:
+		pm = "V.35";
+		break;
+	case STATUS_CABLE_X21:
+		pm = "X.21";
+		break;
+	case STATUS_CABLE_V24:
+		pm = "V.24";
+		break;
+	case STATUS_CABLE_EIA530:
+		pm = "EIA530";
+		break;
+	case STATUS_CABLE_NONE:
+		pm = "no personality";
+		valid = 0;
+		break;
+	default:
+		pm = "invalid personality";
+		valid = 0;
+	}
+
+	if (valid) {
+		if ((value & 7) == ((value >> STATUS_CABLE_PM_SHIFT) & 7)) {
+			dsr = (value & STATUS_CABLE_DSR) ? ", DSR ON" :
+				", DSR off";
+			dcd = (value & STATUS_CABLE_DCD) ? ", carrier ON" :
+				", carrier off";
+		}
+		dte = (value & STATUS_CABLE_DCE) ? " DCE" : " DTE";
+	}
+	netdev_info(port->dev, "%s%s module, %s cable%s%s\n",
+		    pm, dte, cable, dsr, dcd);
+
+	if (value & STATUS_CABLE_DCD)
+		netif_carrier_on(port->dev);
+	else
+		netif_carrier_off(port->dev);
+}
+
+/* Transmit complete interrupt service */
+static inline void wanxl_tx_intr(struct port *port)
+{
+	struct net_device *dev = port->dev;
+
+	while (1) {
+		desc_t *desc = &get_status(port)->tx_descs[port->tx_in];
+		struct sk_buff *skb = port->tx_skbs[port->tx_in];
+
+		switch (desc->stat) {
+		case PACKET_FULL:
+		case PACKET_EMPTY:
+			netif_wake_queue(dev);
+			return;
+
+		case PACKET_UNDERRUN:
+			dev->stats.tx_errors++;
+			dev->stats.tx_fifo_errors++;
+			break;
+
+		default:
+			dev->stats.tx_packets++;
+			dev->stats.tx_bytes += skb->len;
+		}
+		desc->stat = PACKET_EMPTY; /* Free descriptor */
+		dma_unmap_single(&port->card->pdev->dev, desc->address,
+				 skb->len, DMA_TO_DEVICE);
+		dev_consume_skb_irq(skb);
+		port->tx_in = (port->tx_in + 1) % TX_BUFFERS;
+	}
+}
+
+/* Receive complete interrupt service */
+static inline void wanxl_rx_intr(struct card *card)
+{
+	desc_t *desc;
+
+	while (desc = &card->status->rx_descs[card->rx_in],
+	       desc->stat != PACKET_EMPTY) {
+		if ((desc->stat & PACKET_PORT_MASK) > card->n_ports) {
+			pr_crit("%s: received packet for nonexistent port\n",
+				pci_name(card->pdev));
+		} else {
+			struct sk_buff *skb = card->rx_skbs[card->rx_in];
+			struct port *port = &card->ports[desc->stat &
+						    PACKET_PORT_MASK];
+			struct net_device *dev = port->dev;
+
+			if (!skb) {
+				dev->stats.rx_dropped++;
+			} else {
+				dma_unmap_single(&card->pdev->dev,
+						 desc->address, BUFFER_LENGTH,
+						 DMA_FROM_DEVICE);
+				skb_put(skb, desc->length);
+
+#ifdef DEBUG_PKT
+				printk(KERN_DEBUG "%s RX(%i):", dev->name,
+				       skb->len);
+				debug_frame(skb);
+#endif
+				dev->stats.rx_packets++;
+				dev->stats.rx_bytes += skb->len;
+				skb->protocol = hdlc_type_trans(skb, dev);
+				netif_rx(skb);
+				skb = NULL;
+			}
+
+			if (!skb) {
+				skb = dev_alloc_skb(BUFFER_LENGTH);
+				desc->address = skb ?
+					dma_map_single(&card->pdev->dev,
+						       skb->data,
+						       BUFFER_LENGTH,
+						       DMA_FROM_DEVICE) : 0;
+				card->rx_skbs[card->rx_in] = skb;
+			}
+		}
+		desc->stat = PACKET_EMPTY; /* Free descriptor */
+		card->rx_in = (card->rx_in + 1) % RX_QUEUE_LENGTH;
+	}
+}
+
+static irqreturn_t wanxl_intr(int irq, void *dev_id)
+{
+	struct card *card = dev_id;
+	int i;
+	u32 stat;
+	int handled = 0;
+
+	while ((stat = readl(card->plx + PLX_DOORBELL_FROM_CARD)) != 0) {
+		handled = 1;
+		writel(stat, card->plx + PLX_DOORBELL_FROM_CARD);
+
+		for (i = 0; i < card->n_ports; i++) {
+			if (stat & (1 << (DOORBELL_FROM_CARD_TX_0 + i)))
+				wanxl_tx_intr(&card->ports[i]);
+			if (stat & (1 << (DOORBELL_FROM_CARD_CABLE_0 + i)))
+				wanxl_cable_intr(&card->ports[i]);
+		}
+		if (stat & (1 << DOORBELL_FROM_CARD_RX))
+			wanxl_rx_intr(card);
+	}
+
+	return IRQ_RETVAL(handled);
+}
+
+static netdev_tx_t wanxl_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct port *port = dev_to_port(dev);
+	desc_t *desc;
+
+	spin_lock(&port->lock);
+
+	desc = &get_status(port)->tx_descs[port->tx_out];
+	if (desc->stat != PACKET_EMPTY) {
+		/* should never happen - previous xmit should stop queue */
+#ifdef DEBUG_PKT
+                printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name);
+#endif
+		netif_stop_queue(dev);
+		spin_unlock(&port->lock);
+		return NETDEV_TX_BUSY;       /* request packet to be queued */
+	}
+
+#ifdef DEBUG_PKT
+	printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len);
+	debug_frame(skb);
+#endif
+
+	port->tx_skbs[port->tx_out] = skb;
+	desc->address = dma_map_single(&port->card->pdev->dev, skb->data,
+				       skb->len, DMA_TO_DEVICE);
+	desc->length = skb->len;
+	desc->stat = PACKET_FULL;
+	writel(1 << (DOORBELL_TO_CARD_TX_0 + port->node),
+	       port->card->plx + PLX_DOORBELL_TO_CARD);
+
+	port->tx_out = (port->tx_out + 1) % TX_BUFFERS;
+
+	if (get_status(port)->tx_descs[port->tx_out].stat != PACKET_EMPTY) {
+		netif_stop_queue(dev);
+#ifdef DEBUG_PKT
+		printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name);
+#endif
+	}
+
+	spin_unlock(&port->lock);
+	return NETDEV_TX_OK;
+}
+
+static int wanxl_attach(struct net_device *dev, unsigned short encoding,
+			unsigned short parity)
+{
+	struct port *port = dev_to_port(dev);
+
+	if (encoding != ENCODING_NRZ &&
+	    encoding != ENCODING_NRZI)
+		return -EINVAL;
+
+	if (parity != PARITY_NONE &&
+	    parity != PARITY_CRC32_PR1_CCITT &&
+	    parity != PARITY_CRC16_PR1_CCITT &&
+	    parity != PARITY_CRC32_PR0_CCITT &&
+	    parity != PARITY_CRC16_PR0_CCITT)
+		return -EINVAL;
+
+	get_status(port)->encoding = encoding;
+	get_status(port)->parity = parity;
+	return 0;
+}
+
+static int wanxl_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+	const size_t size = sizeof(sync_serial_settings);
+	sync_serial_settings line;
+	struct port *port = dev_to_port(dev);
+
+	switch (ifs->type) {
+	case IF_GET_IFACE:
+		ifs->type = IF_IFACE_SYNC_SERIAL;
+		if (ifs->size < size) {
+			ifs->size = size; /* data size wanted */
+			return -ENOBUFS;
+		}
+		memset(&line, 0, sizeof(line));
+		line.clock_type = get_status(port)->clocking;
+		line.clock_rate = 0;
+		line.loopback = 0;
+
+		if (copy_to_user(ifs->ifs_ifsu.sync, &line, size))
+			return -EFAULT;
+		return 0;
+
+	case IF_IFACE_SYNC_SERIAL:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		if (dev->flags & IFF_UP)
+			return -EBUSY;
+
+		if (copy_from_user(&line, ifs->ifs_ifsu.sync,
+				   size))
+			return -EFAULT;
+
+		if (line.clock_type != CLOCK_EXT &&
+		    line.clock_type != CLOCK_TXFROMRX)
+			return -EINVAL; /* No such clock setting */
+
+		if (line.loopback != 0)
+			return -EINVAL;
+
+		get_status(port)->clocking = line.clock_type;
+		return 0;
+
+	default:
+		return hdlc_ioctl(dev, ifs);
+	}
+}
+
+static int wanxl_open(struct net_device *dev)
+{
+	struct port *port = dev_to_port(dev);
+	u8 __iomem *dbr = port->card->plx + PLX_DOORBELL_TO_CARD;
+	unsigned long timeout;
+	int i;
+
+	if (get_status(port)->open) {
+		netdev_err(dev, "port already open\n");
+		return -EIO;
+	}
+
+	i = hdlc_open(dev);
+	if (i)
+		return i;
+
+	port->tx_in = port->tx_out = 0;
+	for (i = 0; i < TX_BUFFERS; i++)
+		get_status(port)->tx_descs[i].stat = PACKET_EMPTY;
+	/* signal the card */
+	writel(1 << (DOORBELL_TO_CARD_OPEN_0 + port->node), dbr);
+
+	timeout = jiffies + HZ;
+	do {
+		if (get_status(port)->open) {
+			netif_start_queue(dev);
+			return 0;
+		}
+	} while (time_after(timeout, jiffies));
+
+	netdev_err(dev, "unable to open port\n");
+	/* ask the card to close the port, should it be still alive */
+	writel(1 << (DOORBELL_TO_CARD_CLOSE_0 + port->node), dbr);
+	return -EFAULT;
+}
+
+static int wanxl_close(struct net_device *dev)
+{
+	struct port *port = dev_to_port(dev);
+	unsigned long timeout;
+	int i;
+
+	hdlc_close(dev);
+	/* signal the card */
+	writel(1 << (DOORBELL_TO_CARD_CLOSE_0 + port->node),
+	       port->card->plx + PLX_DOORBELL_TO_CARD);
+
+	timeout = jiffies + HZ;
+	do {
+		if (!get_status(port)->open)
+			break;
+	} while (time_after(timeout, jiffies));
+
+	if (get_status(port)->open)
+		netdev_err(dev, "unable to close port\n");
+
+	netif_stop_queue(dev);
+
+	for (i = 0; i < TX_BUFFERS; i++) {
+		desc_t *desc = &get_status(port)->tx_descs[i];
+
+		if (desc->stat != PACKET_EMPTY) {
+			desc->stat = PACKET_EMPTY;
+			dma_unmap_single(&port->card->pdev->dev,
+					 desc->address, port->tx_skbs[i]->len,
+					 DMA_TO_DEVICE);
+			dev_kfree_skb(port->tx_skbs[i]);
+		}
+	}
+	return 0;
+}
+
+static struct net_device_stats *wanxl_get_stats(struct net_device *dev)
+{
+	struct port *port = dev_to_port(dev);
+
+	dev->stats.rx_over_errors = get_status(port)->rx_overruns;
+	dev->stats.rx_frame_errors = get_status(port)->rx_frame_errors;
+	dev->stats.rx_errors = dev->stats.rx_over_errors +
+		dev->stats.rx_frame_errors;
+	return &dev->stats;
+}
+
+static int wanxl_puts_command(struct card *card, u32 cmd)
+{
+	unsigned long timeout = jiffies + 5 * HZ;
+
+	writel(cmd, card->plx + PLX_MAILBOX_1);
+	do {
+		if (readl(card->plx + PLX_MAILBOX_1) == 0)
+			return 0;
+
+		schedule();
+	} while (time_after(timeout, jiffies));
+
+	return -1;
+}
+
+static void wanxl_reset(struct card *card)
+{
+	u32 old_value = readl(card->plx + PLX_CONTROL) & ~PLX_CTL_RESET;
+
+	writel(0x80, card->plx + PLX_MAILBOX_0);
+	writel(old_value | PLX_CTL_RESET, card->plx + PLX_CONTROL);
+	readl(card->plx + PLX_CONTROL); /* wait for posted write */
+	udelay(1);
+	writel(old_value, card->plx + PLX_CONTROL);
+	readl(card->plx + PLX_CONTROL); /* wait for posted write */
+}
+
+static void wanxl_pci_remove_one(struct pci_dev *pdev)
+{
+	struct card *card = pci_get_drvdata(pdev);
+	int i;
+
+	for (i = 0; i < card->n_ports; i++) {
+		unregister_hdlc_device(card->ports[i].dev);
+		free_netdev(card->ports[i].dev);
+	}
+
+	/* unregister and free all host resources */
+	if (card->irq)
+		free_irq(card->irq, card);
+
+	wanxl_reset(card);
+
+	for (i = 0; i < RX_QUEUE_LENGTH; i++)
+		if (card->rx_skbs[i]) {
+			dma_unmap_single(&card->pdev->dev,
+					 card->status->rx_descs[i].address,
+					 BUFFER_LENGTH, DMA_FROM_DEVICE);
+			dev_kfree_skb(card->rx_skbs[i]);
+		}
+
+	if (card->plx)
+		iounmap(card->plx);
+
+	if (card->status)
+		dma_free_coherent(&pdev->dev, sizeof(struct card_status),
+				  card->status, card->status_address);
+
+	pci_release_regions(pdev);
+	pci_disable_device(pdev);
+	kfree(card);
+}
+
+#include "wanxlfw.inc"
+
+static const struct net_device_ops wanxl_ops = {
+	.ndo_open       = wanxl_open,
+	.ndo_stop       = wanxl_close,
+	.ndo_start_xmit = hdlc_start_xmit,
+	.ndo_siocwandev = wanxl_ioctl,
+	.ndo_get_stats  = wanxl_get_stats,
+};
+
+static int wanxl_pci_init_one(struct pci_dev *pdev,
+			      const struct pci_device_id *ent)
+{
+	struct card *card;
+	u32 ramsize, stat;
+	unsigned long timeout;
+	u32 plx_phy;		/* PLX PCI base address */
+	u32 mem_phy;		/* memory PCI base addr */
+	u8 __iomem *mem;	/* memory virtual base addr */
+	int i, ports;
+
+#ifndef MODULE
+	pr_info_once("%s\n", version);
+#endif
+
+	i = pci_enable_device(pdev);
+	if (i)
+		return i;
+
+	/* QUICC can only access first 256 MB of host RAM directly,
+	 * but PLX9060 DMA does 32-bits for actual packet data transfers
+	 */
+
+	/* FIXME when PCI/DMA subsystems are fixed.
+	 * We set both dma_mask and consistent_dma_mask to 28 bits
+	 * and pray pci_alloc_consistent() will use this info. It should
+	 * work on most platforms
+	 */
+	if (dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(28)) ||
+	    dma_set_mask(&pdev->dev, DMA_BIT_MASK(28))) {
+		pr_err("No usable DMA configuration\n");
+		pci_disable_device(pdev);
+		return -EIO;
+	}
+
+	i = pci_request_regions(pdev, "wanXL");
+	if (i) {
+		pci_disable_device(pdev);
+		return i;
+	}
+
+	switch (pdev->device) {
+	case PCI_DEVICE_ID_SBE_WANXL100:
+		ports = 1;
+		break;
+	case PCI_DEVICE_ID_SBE_WANXL200:
+		ports = 2;
+		break;
+	default:
+		ports = 4;
+	}
+
+	card = kzalloc(struct_size(card, ports, ports), GFP_KERNEL);
+	if (!card) {
+		pci_release_regions(pdev);
+		pci_disable_device(pdev);
+		return -ENOBUFS;
+	}
+
+	pci_set_drvdata(pdev, card);
+	card->pdev = pdev;
+
+	card->status = dma_alloc_coherent(&pdev->dev,
+					  sizeof(struct card_status),
+					  &card->status_address, GFP_KERNEL);
+	if (!card->status) {
+		wanxl_pci_remove_one(pdev);
+		return -ENOBUFS;
+	}
+
+#ifdef DEBUG_PCI
+	printk(KERN_DEBUG "wanXL %s: pci_alloc_consistent() returned memory"
+	       " at 0x%LX\n", pci_name(pdev),
+	       (unsigned long long)card->status_address);
+#endif
+
+	/* FIXME when PCI/DMA subsystems are fixed.
+	 * We set both dma_mask and consistent_dma_mask back to 32 bits
+	 * to indicate the card can do 32-bit DMA addressing
+	 */
+	if (dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)) ||
+	    dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
+		pr_err("No usable DMA configuration\n");
+		wanxl_pci_remove_one(pdev);
+		return -EIO;
+	}
+
+	/* set up PLX mapping */
+	plx_phy = pci_resource_start(pdev, 0);
+
+	card->plx = ioremap(plx_phy, 0x70);
+	if (!card->plx) {
+		pr_err("ioremap() failed\n");
+		wanxl_pci_remove_one(pdev);
+		return -EFAULT;
+	}
+
+#if RESET_WHILE_LOADING
+	wanxl_reset(card);
+#endif
+
+	timeout = jiffies + 20 * HZ;
+	while ((stat = readl(card->plx + PLX_MAILBOX_0)) != 0) {
+		if (time_before(timeout, jiffies)) {
+			pr_warn("%s: timeout waiting for PUTS to complete\n",
+				pci_name(pdev));
+			wanxl_pci_remove_one(pdev);
+			return -ENODEV;
+		}
+
+		switch (stat & 0xC0) {
+		case 0x00:	/* hmm - PUTS completed with non-zero code? */
+		case 0x80:	/* PUTS still testing the hardware */
+			break;
+
+		default:
+			pr_warn("%s: PUTS test 0x%X failed\n",
+				pci_name(pdev), stat & 0x30);
+			wanxl_pci_remove_one(pdev);
+			return -ENODEV;
+		}
+
+		schedule();
+	}
+
+	/* get on-board memory size (PUTS detects no more than 4 MB) */
+	ramsize = readl(card->plx + PLX_MAILBOX_2) & MBX2_MEMSZ_MASK;
+
+	/* set up on-board RAM mapping */
+	mem_phy = pci_resource_start(pdev, 2);
+
+	/* sanity check the board's reported memory size */
+	if (ramsize < BUFFERS_ADDR +
+	    (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * ports) {
+		pr_warn("%s: no enough on-board RAM (%u bytes detected, %u bytes required)\n",
+			pci_name(pdev), ramsize,
+			BUFFERS_ADDR +
+			(TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * ports);
+		wanxl_pci_remove_one(pdev);
+		return -ENODEV;
+	}
+
+	if (wanxl_puts_command(card, MBX1_CMD_BSWAP)) {
+		pr_warn("%s: unable to Set Byte Swap Mode\n", pci_name(pdev));
+		wanxl_pci_remove_one(pdev);
+		return -ENODEV;
+	}
+
+	for (i = 0; i < RX_QUEUE_LENGTH; i++) {
+		struct sk_buff *skb = dev_alloc_skb(BUFFER_LENGTH);
+
+		card->rx_skbs[i] = skb;
+		if (skb)
+			card->status->rx_descs[i].address =
+				dma_map_single(&card->pdev->dev, skb->data,
+					       BUFFER_LENGTH, DMA_FROM_DEVICE);
+	}
+
+	mem = ioremap(mem_phy, PDM_OFFSET + sizeof(firmware));
+	if (!mem) {
+		pr_err("ioremap() failed\n");
+		wanxl_pci_remove_one(pdev);
+		return -EFAULT;
+	}
+
+	for (i = 0; i < sizeof(firmware); i += 4)
+		writel(ntohl(*(__be32 *)(firmware + i)), mem + PDM_OFFSET + i);
+
+	for (i = 0; i < ports; i++)
+		writel(card->status_address +
+		       (void *)&card->status->port_status[i] -
+		       (void *)card->status, mem + PDM_OFFSET + 4 + i * 4);
+	writel(card->status_address, mem + PDM_OFFSET + 20);
+	writel(PDM_OFFSET, mem);
+	iounmap(mem);
+
+	writel(0, card->plx + PLX_MAILBOX_5);
+
+	if (wanxl_puts_command(card, MBX1_CMD_ABORTJ)) {
+		pr_warn("%s: unable to Abort and Jump\n", pci_name(pdev));
+		wanxl_pci_remove_one(pdev);
+		return -ENODEV;
+	}
+
+	timeout = jiffies + 5 * HZ;
+	do {
+		stat = readl(card->plx + PLX_MAILBOX_5);
+		if (stat)
+			break;
+		schedule();
+	} while (time_after(timeout, jiffies));
+
+	if (!stat) {
+		pr_warn("%s: timeout while initializing card firmware\n",
+			pci_name(pdev));
+		wanxl_pci_remove_one(pdev);
+		return -ENODEV;
+	}
+
+#if DETECT_RAM
+	ramsize = stat;
+#endif
+
+	pr_info("%s: at 0x%X, %u KB of RAM at 0x%X, irq %u\n",
+		pci_name(pdev), plx_phy, ramsize / 1024, mem_phy, pdev->irq);
+
+	/* Allocate IRQ */
+	if (request_irq(pdev->irq, wanxl_intr, IRQF_SHARED, "wanXL", card)) {
+		pr_warn("%s: could not allocate IRQ%i\n",
+			pci_name(pdev), pdev->irq);
+		wanxl_pci_remove_one(pdev);
+		return -EBUSY;
+	}
+	card->irq = pdev->irq;
+
+	for (i = 0; i < ports; i++) {
+		hdlc_device *hdlc;
+		struct port *port = &card->ports[i];
+		struct net_device *dev = alloc_hdlcdev(port);
+
+		if (!dev) {
+			pr_err("%s: unable to allocate memory\n",
+			       pci_name(pdev));
+			wanxl_pci_remove_one(pdev);
+			return -ENOMEM;
+		}
+
+		port->dev = dev;
+		hdlc = dev_to_hdlc(dev);
+		spin_lock_init(&port->lock);
+		dev->tx_queue_len = 50;
+		dev->netdev_ops = &wanxl_ops;
+		hdlc->attach = wanxl_attach;
+		hdlc->xmit = wanxl_xmit;
+		port->card = card;
+		port->node = i;
+		get_status(port)->clocking = CLOCK_EXT;
+		if (register_hdlc_device(dev)) {
+			pr_err("%s: unable to register hdlc device\n",
+			       pci_name(pdev));
+			free_netdev(dev);
+			wanxl_pci_remove_one(pdev);
+			return -ENOBUFS;
+		}
+		card->n_ports++;
+	}
+
+	pr_info("%s: port", pci_name(pdev));
+	for (i = 0; i < ports; i++)
+		pr_cont("%s #%i: %s",
+			i ? "," : "", i, card->ports[i].dev->name);
+	pr_cont("\n");
+
+	for (i = 0; i < ports; i++)
+		wanxl_cable_intr(&card->ports[i]); /* get carrier status etc.*/
+
+	return 0;
+}
+
+static const struct pci_device_id wanxl_pci_tbl[] = {
+	{ PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL100, PCI_ANY_ID,
+	  PCI_ANY_ID, 0, 0, 0 },
+	{ PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL200, PCI_ANY_ID,
+	  PCI_ANY_ID, 0, 0, 0 },
+	{ PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL400, PCI_ANY_ID,
+	  PCI_ANY_ID, 0, 0, 0 },
+	{ 0, }
+};
+
+static struct pci_driver wanxl_pci_driver = {
+	.name		= "wanXL",
+	.id_table	= wanxl_pci_tbl,
+	.probe		= wanxl_pci_init_one,
+	.remove		= wanxl_pci_remove_one,
+};
+
+static int __init wanxl_init_module(void)
+{
+#ifdef MODULE
+	pr_info("%s\n", version);
+#endif
+	return pci_register_driver(&wanxl_pci_driver);
+}
+
+static void __exit wanxl_cleanup_module(void)
+{
+	pci_unregister_driver(&wanxl_pci_driver);
+}
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
+MODULE_DESCRIPTION("SBE Inc. wanXL serial port driver");
+MODULE_LICENSE("GPL v2");
+MODULE_DEVICE_TABLE(pci, wanxl_pci_tbl);
+
+module_init(wanxl_init_module);
+module_exit(wanxl_cleanup_module);