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, 577 insertions, 0 deletions

diff --git a/drivers/net/ethernet/cirrus/mac89x0.c b/drivers/net/ethernet/cirrus/mac89x0.c
new file mode 100644
index 000000000..21a70b1f0
--- /dev/null
+++ b/drivers/net/ethernet/cirrus/mac89x0.c
@@ -0,0 +1,577 @@
+/* mac89x0.c: A Crystal Semiconductor CS89[02]0 driver for linux. */
+/*
+	Written 1996 by Russell Nelson, with reference to skeleton.c
+	written 1993-1994 by Donald Becker.
+
+	This software may be used and distributed according to the terms
+	of the GNU General Public License, incorporated herein by reference.
+
+	The author may be reached at nelson@crynwr.com, Crynwr
+	Software, 11 Grant St., Potsdam, NY 13676
+
+  Changelog:
+
+  Mike Cruse        : mcruse@cti-ltd.com
+                    : Changes for Linux 2.0 compatibility.
+                    : Added dev_id parameter in net_interrupt(),
+                    : request_irq() and free_irq(). Just NULL for now.
+
+  Mike Cruse        : Added MOD_INC_USE_COUNT and MOD_DEC_USE_COUNT macros
+                    : in net_open() and net_close() so kerneld would know
+                    : that the module is in use and wouldn't eject the
+                    : driver prematurely.
+
+  Mike Cruse        : Rewrote init_module() and cleanup_module using 8390.c
+                    : as an example. Disabled autoprobing in init_module(),
+                    : not a good thing to do to other devices while Linux
+                    : is running from all accounts.
+
+  Alan Cox          : Removed 1.2 support, added 2.1 extra counters.
+
+  David Huggins-Daines <dhd@debian.org>
+
+  Split this off into mac89x0.c, and gutted it of all parts which are
+  not relevant to the existing CS8900 cards on the Macintosh
+  (i.e. basically the Daynaport CS and LC cards).  To be precise:
+
+    * Removed all the media-detection stuff, because these cards are
+    TP-only.
+
+    * Lobotomized the ISA interrupt bogosity, because these cards use
+    a hardwired NuBus interrupt and a magic ISAIRQ value in the card.
+
+    * Basically eliminated everything not relevant to getting the
+    cards minimally functioning on the Macintosh.
+
+  I might add that these cards are badly designed even from the Mac
+  standpoint, in that Dayna, in their infinite wisdom, used NuBus slot
+  I/O space and NuBus interrupts for these cards, but neglected to
+  provide anything even remotely resembling a NuBus ROM.  Therefore we
+  have to probe for them in a brain-damaged ISA-like fashion.
+
+  Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 11/01/2001
+  check kmalloc and release the allocated memory on failure in
+  mac89x0_probe and in init_module
+  use local_irq_{save,restore}(flags) in net_get_stat, not just
+  local_irq_{dis,en}able()
+*/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+static const char version[] =
+"cs89x0.c:v1.02 11/26/96 Russell Nelson <nelson@crynwr.com>\n";
+
+#include <linux/module.h>
+
+/*
+  Sources:
+
+	Crynwr packet driver epktisa.
+
+	Crystal Semiconductor data sheets.
+
+*/
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <linux/string.h>
+#include <linux/nubus.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/platform_device.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+#include <linux/gfp.h>
+
+#include <asm/io.h>
+#include <asm/hwtest.h>
+#include <asm/macints.h>
+
+#include "cs89x0.h"
+
+static int debug = -1;
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "debug message level");
+
+/* Information that need to be kept for each board. */
+struct net_local {
+	int msg_enable;
+	int chip_type;		/* one of: CS8900, CS8920, CS8920M */
+	char chip_revision;	/* revision letter of the chip ('A'...) */
+	int send_cmd;		/* the propercommand used to send a packet. */
+	int rx_mode;
+	int curr_rx_cfg;
+        int send_underrun;      /* keep track of how many underruns in a row we get */
+};
+
+/* Index to functions, as function prototypes. */
+static int net_open(struct net_device *dev);
+static netdev_tx_t net_send_packet(struct sk_buff *skb, struct net_device *dev);
+static irqreturn_t net_interrupt(int irq, void *dev_id);
+static void set_multicast_list(struct net_device *dev);
+static void net_rx(struct net_device *dev);
+static int net_close(struct net_device *dev);
+static struct net_device_stats *net_get_stats(struct net_device *dev);
+static int set_mac_address(struct net_device *dev, void *addr);
+
+/* For reading/writing registers ISA-style */
+static inline int
+readreg_io(struct net_device *dev, int portno)
+{
+	nubus_writew(swab16(portno), dev->base_addr + ADD_PORT);
+	return swab16(nubus_readw(dev->base_addr + DATA_PORT));
+}
+
+static inline void
+writereg_io(struct net_device *dev, int portno, int value)
+{
+	nubus_writew(swab16(portno), dev->base_addr + ADD_PORT);
+	nubus_writew(swab16(value), dev->base_addr + DATA_PORT);
+}
+
+/* These are for reading/writing registers in shared memory */
+static inline int
+readreg(struct net_device *dev, int portno)
+{
+	return swab16(nubus_readw(dev->mem_start + portno));
+}
+
+static inline void
+writereg(struct net_device *dev, int portno, int value)
+{
+	nubus_writew(swab16(value), dev->mem_start + portno);
+}
+
+static const struct net_device_ops mac89x0_netdev_ops = {
+	.ndo_open		= net_open,
+	.ndo_stop		= net_close,
+	.ndo_start_xmit		= net_send_packet,
+	.ndo_get_stats		= net_get_stats,
+	.ndo_set_rx_mode	= set_multicast_list,
+	.ndo_set_mac_address	= set_mac_address,
+	.ndo_validate_addr	= eth_validate_addr,
+};
+
+/* Probe for the CS8900 card in slot E.  We won't bother looking
+   anywhere else until we have a really good reason to do so. */
+static int mac89x0_device_probe(struct platform_device *pdev)
+{
+	struct net_device *dev;
+	struct net_local *lp;
+	int i, slot;
+	unsigned rev_type = 0;
+	unsigned long ioaddr;
+	unsigned short sig;
+	int err = -ENODEV;
+	struct nubus_rsrc *fres;
+
+	dev = alloc_etherdev(sizeof(struct net_local));
+	if (!dev)
+		return -ENOMEM;
+
+	/* We might have to parameterize this later */
+	slot = 0xE;
+	/* Get out now if there's a real NuBus card in slot E */
+	for_each_func_rsrc(fres)
+		if (fres->board->slot == slot)
+			goto out;
+
+	/* The pseudo-ISA bits always live at offset 0x300 (gee,
+           wonder why...) */
+	ioaddr = (unsigned long)
+		nubus_slot_addr(slot) | (((slot&0xf) << 20) + DEFAULTIOBASE);
+	{
+		int card_present;
+
+		card_present = (hwreg_present((void *)ioaddr + 4) &&
+				hwreg_present((void *)ioaddr + DATA_PORT));
+		if (!card_present)
+			goto out;
+	}
+
+	nubus_writew(0, ioaddr + ADD_PORT);
+	sig = nubus_readw(ioaddr + DATA_PORT);
+	if (sig != swab16(CHIP_EISA_ID_SIG))
+		goto out;
+
+	SET_NETDEV_DEV(dev, &pdev->dev);
+
+	/* Initialize the net_device structure. */
+	lp = netdev_priv(dev);
+
+	lp->msg_enable = netif_msg_init(debug, 0);
+
+	/* Fill in the 'dev' fields. */
+	dev->base_addr = ioaddr;
+	dev->mem_start = (unsigned long)
+		nubus_slot_addr(slot) | (((slot&0xf) << 20) + MMIOBASE);
+	dev->mem_end = dev->mem_start + 0x1000;
+
+	/* Turn on shared memory */
+	writereg_io(dev, PP_BusCTL, MEMORY_ON);
+
+	/* get the chip type */
+	rev_type = readreg(dev, PRODUCT_ID_ADD);
+	lp->chip_type = rev_type &~ REVISON_BITS;
+	lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
+
+	/* Check the chip type and revision in order to set the correct send command
+	CS8920 revision C and CS8900 revision F can use the faster send. */
+	lp->send_cmd = TX_AFTER_381;
+	if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
+		lp->send_cmd = TX_NOW;
+	if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
+		lp->send_cmd = TX_NOW;
+
+	netif_dbg(lp, drv, dev, "%s", version);
+
+	pr_info("cs89%c0%s rev %c found at %#8lx\n",
+		lp->chip_type == CS8900 ? '0' : '2',
+		lp->chip_type == CS8920M ? "M" : "",
+		lp->chip_revision, dev->base_addr);
+
+	/* Try to read the MAC address */
+	if ((readreg(dev, PP_SelfST) & (EEPROM_PRESENT | EEPROM_OK)) == 0) {
+		pr_info("No EEPROM, giving up now.\n");
+		goto out1;
+        } else {
+		u8 addr[ETH_ALEN];
+
+                for (i = 0; i < ETH_ALEN; i += 2) {
+			/* Big-endian (why??!) */
+			unsigned short s = readreg(dev, PP_IA + i);
+			addr[i] = s >> 8;
+			addr[i+1] = s & 0xff;
+                }
+		eth_hw_addr_set(dev, addr);
+        }
+
+	dev->irq = SLOT2IRQ(slot);
+
+	/* print the IRQ and ethernet address. */
+
+	pr_info("MAC %pM, IRQ %d\n", dev->dev_addr, dev->irq);
+
+	dev->netdev_ops		= &mac89x0_netdev_ops;
+
+	err = register_netdev(dev);
+	if (err)
+		goto out1;
+
+	platform_set_drvdata(pdev, dev);
+	return 0;
+out1:
+	nubus_writew(0, dev->base_addr + ADD_PORT);
+out:
+	free_netdev(dev);
+	return err;
+}
+
+/* Open/initialize the board.  This is called (in the current kernel)
+   sometime after booting when the 'ifconfig' program is run.
+
+   This routine should set everything up anew at each open, even
+   registers that "should" only need to be set once at boot, so that
+   there is non-reboot way to recover if something goes wrong.
+   */
+static int
+net_open(struct net_device *dev)
+{
+	struct net_local *lp = netdev_priv(dev);
+	int i;
+
+	/* Disable the interrupt for now */
+	writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) & ~ENABLE_IRQ);
+
+	/* Grab the interrupt */
+	if (request_irq(dev->irq, net_interrupt, 0, "cs89x0", dev))
+		return -EAGAIN;
+
+	/* Set up the IRQ - Apparently magic */
+	if (lp->chip_type == CS8900)
+		writereg(dev, PP_CS8900_ISAINT, 0);
+	else
+		writereg(dev, PP_CS8920_ISAINT, 0);
+
+	/* set the Ethernet address */
+	for (i=0; i < ETH_ALEN/2; i++)
+		writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
+
+	/* Turn on both receive and transmit operations */
+	writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
+
+	/* Receive only error free packets addressed to this card */
+	lp->rx_mode = 0;
+	writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
+
+	lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
+
+	writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
+
+	writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL |
+	       TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
+
+	writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL |
+		 TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL);
+
+	/* now that we've got our act together, enable everything */
+	writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ);
+	netif_start_queue(dev);
+	return 0;
+}
+
+static netdev_tx_t
+net_send_packet(struct sk_buff *skb, struct net_device *dev)
+{
+	struct net_local *lp = netdev_priv(dev);
+	unsigned long flags;
+
+	netif_dbg(lp, tx_queued, dev, "sent %d byte packet of type %x\n",
+		  skb->len, skb->data[ETH_ALEN + ETH_ALEN] << 8 |
+		  skb->data[ETH_ALEN + ETH_ALEN + 1]);
+
+	/* keep the upload from being interrupted, since we
+	   ask the chip to start transmitting before the
+	   whole packet has been completely uploaded. */
+	local_irq_save(flags);
+	netif_stop_queue(dev);
+
+	/* initiate a transmit sequence */
+	writereg(dev, PP_TxCMD, lp->send_cmd);
+	writereg(dev, PP_TxLength, skb->len);
+
+	/* Test to see if the chip has allocated memory for the packet */
+	if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
+		/* Gasp!  It hasn't.  But that shouldn't happen since
+		   we're waiting for TxOk, so return 1 and requeue this packet. */
+		local_irq_restore(flags);
+		return NETDEV_TX_BUSY;
+	}
+
+	/* Write the contents of the packet */
+	skb_copy_from_linear_data(skb, (void *)(dev->mem_start + PP_TxFrame),
+				  skb->len+1);
+
+	local_irq_restore(flags);
+	dev_kfree_skb (skb);
+
+	return NETDEV_TX_OK;
+}
+
+/* The typical workload of the driver:
+   Handle the network interface interrupts. */
+static irqreturn_t net_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = dev_id;
+	struct net_local *lp;
+	int ioaddr, status;
+
+	ioaddr = dev->base_addr;
+	lp = netdev_priv(dev);
+
+	/* we MUST read all the events out of the ISQ, otherwise we'll never
+           get interrupted again.  As a consequence, we can't have any limit
+           on the number of times we loop in the interrupt handler.  The
+           hardware guarantees that eventually we'll run out of events.  Of
+           course, if you're on a slow machine, and packets are arriving
+           faster than you can read them off, you're screwed.  Hasta la
+           vista, baby!  */
+	while ((status = swab16(nubus_readw(dev->base_addr + ISQ_PORT)))) {
+		netif_dbg(lp, intr, dev, "status=%04x\n", status);
+		switch(status & ISQ_EVENT_MASK) {
+		case ISQ_RECEIVER_EVENT:
+			/* Got a packet(s). */
+			net_rx(dev);
+			break;
+		case ISQ_TRANSMITTER_EVENT:
+			dev->stats.tx_packets++;
+			netif_wake_queue(dev);
+			if ((status & TX_OK) == 0)
+				dev->stats.tx_errors++;
+			if (status & TX_LOST_CRS)
+				dev->stats.tx_carrier_errors++;
+			if (status & TX_SQE_ERROR)
+				dev->stats.tx_heartbeat_errors++;
+			if (status & TX_LATE_COL)
+				dev->stats.tx_window_errors++;
+			if (status & TX_16_COL)
+				dev->stats.tx_aborted_errors++;
+			break;
+		case ISQ_BUFFER_EVENT:
+			if (status & READY_FOR_TX) {
+				/* we tried to transmit a packet earlier,
+                                   but inexplicably ran out of buffers.
+                                   That shouldn't happen since we only ever
+                                   load one packet.  Shrug.  Do the right
+                                   thing anyway. */
+				netif_wake_queue(dev);
+			}
+			if (status & TX_UNDERRUN) {
+				netif_dbg(lp, tx_err, dev, "transmit underrun\n");
+                                lp->send_underrun++;
+                                if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381;
+                                else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL;
+                        }
+			break;
+		case ISQ_RX_MISS_EVENT:
+			dev->stats.rx_missed_errors += (status >> 6);
+			break;
+		case ISQ_TX_COL_EVENT:
+			dev->stats.collisions += (status >> 6);
+			break;
+		}
+	}
+	return IRQ_HANDLED;
+}
+
+/* We have a good packet(s), get it/them out of the buffers. */
+static void
+net_rx(struct net_device *dev)
+{
+	struct net_local *lp = netdev_priv(dev);
+	struct sk_buff *skb;
+	int status, length;
+
+	status = readreg(dev, PP_RxStatus);
+	if ((status & RX_OK) == 0) {
+		dev->stats.rx_errors++;
+		if (status & RX_RUNT)
+				dev->stats.rx_length_errors++;
+		if (status & RX_EXTRA_DATA)
+				dev->stats.rx_length_errors++;
+		if ((status & RX_CRC_ERROR) &&
+		    !(status & (RX_EXTRA_DATA|RX_RUNT)))
+			/* per str 172 */
+			dev->stats.rx_crc_errors++;
+		if (status & RX_DRIBBLE)
+				dev->stats.rx_frame_errors++;
+		return;
+	}
+
+	length = readreg(dev, PP_RxLength);
+	/* Malloc up new buffer. */
+	skb = alloc_skb(length, GFP_ATOMIC);
+	if (skb == NULL) {
+		dev->stats.rx_dropped++;
+		return;
+	}
+	skb_put(skb, length);
+
+	skb_copy_to_linear_data(skb, (void *)(dev->mem_start + PP_RxFrame),
+				length);
+
+	netif_dbg(lp, rx_status, dev, "received %d byte packet of type %x\n",
+		  length, skb->data[ETH_ALEN + ETH_ALEN] << 8 |
+		  skb->data[ETH_ALEN + ETH_ALEN + 1]);
+
+        skb->protocol=eth_type_trans(skb,dev);
+	netif_rx(skb);
+	dev->stats.rx_packets++;
+	dev->stats.rx_bytes += length;
+}
+
+/* The inverse routine to net_open(). */
+static int
+net_close(struct net_device *dev)
+{
+
+	writereg(dev, PP_RxCFG, 0);
+	writereg(dev, PP_TxCFG, 0);
+	writereg(dev, PP_BufCFG, 0);
+	writereg(dev, PP_BusCTL, 0);
+
+	netif_stop_queue(dev);
+
+	free_irq(dev->irq, dev);
+
+	/* Update the statistics here. */
+
+	return 0;
+
+}
+
+/* Get the current statistics.	This may be called with the card open or
+   closed. */
+static struct net_device_stats *
+net_get_stats(struct net_device *dev)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	/* Update the statistics from the device registers. */
+	dev->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
+	dev->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
+	local_irq_restore(flags);
+
+	return &dev->stats;
+}
+
+static void set_multicast_list(struct net_device *dev)
+{
+	struct net_local *lp = netdev_priv(dev);
+
+	if(dev->flags&IFF_PROMISC)
+	{
+		lp->rx_mode = RX_ALL_ACCEPT;
+	} else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev)) {
+		/* The multicast-accept list is initialized to accept-all, and we
+		   rely on higher-level filtering for now. */
+		lp->rx_mode = RX_MULTCAST_ACCEPT;
+	}
+	else
+		lp->rx_mode = 0;
+
+	writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
+
+	/* in promiscuous mode, we accept errored packets, so we have to enable interrupts on them also */
+	writereg(dev, PP_RxCFG, lp->curr_rx_cfg |
+	     (lp->rx_mode == RX_ALL_ACCEPT? (RX_CRC_ERROR_ENBL|RX_RUNT_ENBL|RX_EXTRA_DATA_ENBL) : 0));
+}
+
+
+static int set_mac_address(struct net_device *dev, void *addr)
+{
+	struct sockaddr *saddr = addr;
+	int i;
+
+	if (!is_valid_ether_addr(saddr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	eth_hw_addr_set(dev, saddr->sa_data);
+	netdev_info(dev, "Setting MAC address to %pM\n", dev->dev_addr);
+
+	/* set the Ethernet address */
+	for (i=0; i < ETH_ALEN/2; i++)
+		writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
+
+	return 0;
+}
+
+MODULE_LICENSE("GPL");
+
+static int mac89x0_device_remove(struct platform_device *pdev)
+{
+	struct net_device *dev = platform_get_drvdata(pdev);
+
+	unregister_netdev(dev);
+	nubus_writew(0, dev->base_addr + ADD_PORT);
+	free_netdev(dev);
+	return 0;
+}
+
+static struct platform_driver mac89x0_platform_driver = {
+	.probe = mac89x0_device_probe,
+	.remove = mac89x0_device_remove,
+	.driver = {
+		.name = "mac89x0",
+	},
+};
+
+module_platform_driver(mac89x0_platform_driver);