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, 418 insertions, 0 deletions

diff --git a/drivers/net/arcnet/com20020.c b/drivers/net/arcnet/com20020.c
new file mode 100644
index 000000000..06e1651b5
--- /dev/null
+++ b/drivers/net/arcnet/com20020.c
@@ -0,0 +1,418 @@
+/*
+ * Linux ARCnet driver - COM20020 chipset support
+ *
+ * Written 1997 by David Woodhouse.
+ * Written 1994-1999 by Avery Pennarun.
+ * Written 1999 by Martin Mares <mj@ucw.cz>.
+ * Derived from skeleton.c by Donald Becker.
+ *
+ * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
+ *  for sponsoring the further development of this driver.
+ *
+ * **********************
+ *
+ * The original copyright of skeleton.c was as follows:
+ *
+ * skeleton.c Written 1993 by Donald Becker.
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency.  This software may only be used
+ * and distributed according to the terms of the GNU General Public License as
+ * modified by SRC, incorporated herein by reference.
+ *
+ * **********************
+ *
+ * For more details, see drivers/net/arcnet.c
+ *
+ * **********************
+ */
+
+#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/ioport.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+
+#include "arcdevice.h"
+#include "com20020.h"
+
+static const char * const clockrates[] = {
+	"XXXXXXX", "XXXXXXXX", "XXXXXX", "2.5 Mb/s",
+	"1.25Mb/s", "625 Kb/s", "312.5 Kb/s", "156.25 Kb/s",
+	"Reserved", "Reserved", "Reserved"
+};
+
+static void com20020_command(struct net_device *dev, int command);
+static int com20020_status(struct net_device *dev);
+static void com20020_setmask(struct net_device *dev, int mask);
+static int com20020_reset(struct net_device *dev, int really_reset);
+static void com20020_copy_to_card(struct net_device *dev, int bufnum,
+				  int offset, void *buf, int count);
+static void com20020_copy_from_card(struct net_device *dev, int bufnum,
+				    int offset, void *buf, int count);
+static void com20020_set_mc_list(struct net_device *dev);
+static void com20020_close(struct net_device *);
+
+static void com20020_copy_from_card(struct net_device *dev, int bufnum,
+				    int offset, void *buf, int count)
+{
+	int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;
+
+	/* set up the address register */
+	arcnet_outb((ofs >> 8) | RDDATAflag | AUTOINCflag,
+		    ioaddr, COM20020_REG_W_ADDR_HI);
+	arcnet_outb(ofs & 0xff, ioaddr, COM20020_REG_W_ADDR_LO);
+
+	/* copy the data */
+	TIME(dev, "insb", count,
+	     arcnet_insb(ioaddr, COM20020_REG_RW_MEMDATA, buf, count));
+}
+
+static void com20020_copy_to_card(struct net_device *dev, int bufnum,
+				  int offset, void *buf, int count)
+{
+	int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;
+
+	/* set up the address register */
+	arcnet_outb((ofs >> 8) | AUTOINCflag, ioaddr, COM20020_REG_W_ADDR_HI);
+	arcnet_outb(ofs & 0xff, ioaddr, COM20020_REG_W_ADDR_LO);
+
+	/* copy the data */
+	TIME(dev, "outsb", count,
+	     arcnet_outsb(ioaddr, COM20020_REG_RW_MEMDATA, buf, count));
+}
+
+/* Reset the card and check some basic stuff during the detection stage. */
+int com20020_check(struct net_device *dev)
+{
+	int ioaddr = dev->base_addr, status;
+	struct arcnet_local *lp = netdev_priv(dev);
+
+	arcnet_outb(XTOcfg(3) | RESETcfg, ioaddr, COM20020_REG_W_CONFIG);
+	udelay(5);
+	arcnet_outb(XTOcfg(3), ioaddr, COM20020_REG_W_CONFIG);
+	mdelay(RESETtime);
+
+	lp->setup = lp->clockm ? 0 : (lp->clockp << 1);
+	lp->setup2 = (lp->clockm << 4) | 8;
+
+	/* CHECK: should we do this for SOHARD cards ? */
+	/* Enable P1Mode for backplane mode */
+	lp->setup = lp->setup | P1MODE;
+
+	com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
+	arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
+
+	if (lp->clockm != 0) {
+		com20020_set_subaddress(lp, ioaddr, SUB_SETUP2);
+		arcnet_outb(lp->setup2, ioaddr, COM20020_REG_W_XREG);
+
+		/* must now write the magic "restart operation" command */
+		mdelay(1);
+		arcnet_outb(STARTIOcmd, ioaddr, COM20020_REG_W_COMMAND);
+	}
+
+	lp->config = (lp->timeout << 3) | (lp->backplane << 2) | SUB_NODE;
+	/* set node ID to 0x42 (but transmitter is disabled, so it's okay) */
+	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
+	arcnet_outb(0x42, ioaddr, COM20020_REG_W_XREG);
+
+	status = arcnet_inb(ioaddr, COM20020_REG_R_STATUS);
+
+	if ((status & 0x99) != (NORXflag | TXFREEflag | RESETflag)) {
+		arc_printk(D_NORMAL, dev, "status invalid (%Xh).\n", status);
+		return -ENODEV;
+	}
+	arc_printk(D_INIT_REASONS, dev, "status after reset: %X\n", status);
+
+	arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear,
+		    ioaddr, COM20020_REG_W_COMMAND);
+	status = arcnet_inb(ioaddr, COM20020_REG_R_STATUS);
+	arc_printk(D_INIT_REASONS, dev, "status after reset acknowledged: %X\n",
+		   status);
+
+	/* Read first location of memory */
+	arcnet_outb(0 | RDDATAflag | AUTOINCflag,
+		    ioaddr, COM20020_REG_W_ADDR_HI);
+	arcnet_outb(0, ioaddr, COM20020_REG_W_ADDR_LO);
+
+	status = arcnet_inb(ioaddr, COM20020_REG_RW_MEMDATA);
+	if (status != TESTvalue) {
+		arc_printk(D_NORMAL, dev, "Signature byte not found (%02Xh != D1h).\n",
+			   status);
+		return -ENODEV;
+	}
+	return 0;
+}
+
+static int com20020_set_hwaddr(struct net_device *dev, void *addr)
+{
+	int ioaddr = dev->base_addr;
+	struct arcnet_local *lp = netdev_priv(dev);
+	struct sockaddr *hwaddr = addr;
+
+	dev_addr_set(dev, hwaddr->sa_data);
+	com20020_set_subaddress(lp, ioaddr, SUB_NODE);
+	arcnet_outb(dev->dev_addr[0], ioaddr, COM20020_REG_W_XREG);
+
+	return 0;
+}
+
+static int com20020_netdev_open(struct net_device *dev)
+{
+	int ioaddr = dev->base_addr;
+	struct arcnet_local *lp = netdev_priv(dev);
+
+	lp->config |= TXENcfg;
+	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
+
+	return arcnet_open(dev);
+}
+
+static int com20020_netdev_close(struct net_device *dev)
+{
+	int ioaddr = dev->base_addr;
+	struct arcnet_local *lp = netdev_priv(dev);
+
+	arcnet_close(dev);
+
+	/* disable transmitter */
+	lp->config &= ~TXENcfg;
+	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
+	return 0;
+}
+
+const struct net_device_ops com20020_netdev_ops = {
+	.ndo_open	= com20020_netdev_open,
+	.ndo_stop	= com20020_netdev_close,
+	.ndo_start_xmit = arcnet_send_packet,
+	.ndo_tx_timeout = arcnet_timeout,
+	.ndo_set_mac_address = com20020_set_hwaddr,
+	.ndo_set_rx_mode = com20020_set_mc_list,
+};
+
+/* Set up the struct net_device associated with this card.  Called after
+ * probing succeeds.
+ */
+int com20020_found(struct net_device *dev, int shared)
+{
+	struct arcnet_local *lp;
+	int ioaddr = dev->base_addr;
+
+	/* Initialize the rest of the device structure. */
+
+	lp = netdev_priv(dev);
+
+	lp->hw.owner = THIS_MODULE;
+	lp->hw.command = com20020_command;
+	lp->hw.status = com20020_status;
+	lp->hw.intmask = com20020_setmask;
+	lp->hw.reset = com20020_reset;
+	lp->hw.copy_to_card = com20020_copy_to_card;
+	lp->hw.copy_from_card = com20020_copy_from_card;
+	lp->hw.close = com20020_close;
+
+	/* FIXME: do this some other way! */
+	if (!dev->dev_addr[0])
+		arcnet_set_addr(dev, arcnet_inb(ioaddr, 8));
+
+	com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
+	arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
+
+	if (lp->card_flags & ARC_CAN_10MBIT) {
+		com20020_set_subaddress(lp, ioaddr, SUB_SETUP2);
+		arcnet_outb(lp->setup2, ioaddr, COM20020_REG_W_XREG);
+
+		/* must now write the magic "restart operation" command */
+		mdelay(1);
+		arcnet_outb(STARTIOcmd, ioaddr, COM20020_REG_W_COMMAND);
+	}
+
+	lp->config = (lp->timeout << 3) | (lp->backplane << 2) | SUB_NODE;
+	/* Default 0x38 + register: Node ID */
+	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
+	arcnet_outb(dev->dev_addr[0], ioaddr, COM20020_REG_W_XREG);
+
+	/* reserve the irq */
+	if (request_irq(dev->irq, arcnet_interrupt, shared,
+			"arcnet (COM20020)", dev)) {
+		arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
+		return -ENODEV;
+	}
+
+	arc_printk(D_NORMAL, dev, "%s: station %02Xh found at %03lXh, IRQ %d.\n",
+		   lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq);
+
+	if (lp->backplane)
+		arc_printk(D_NORMAL, dev, "Using backplane mode.\n");
+
+	if (lp->timeout != 3)
+		arc_printk(D_NORMAL, dev, "Using extended timeout value of %d\n",
+			   lp->timeout);
+
+	arc_printk(D_NORMAL, dev, "Using CKP %d - data rate %s\n",
+		   lp->setup >> 1,
+		   clockrates[3 -
+			      ((lp->setup2 & 0xF0) >> 4) +
+			      ((lp->setup & 0x0F) >> 1)]);
+			/* The clockrates array index looks very fragile.
+			 * It seems like it could have negative indexing.
+			 */
+
+	if (register_netdev(dev)) {
+		free_irq(dev->irq, dev);
+		return -EIO;
+	}
+	return 0;
+}
+
+/* Do a hardware reset on the card, and set up necessary registers.
+ *
+ * This should be called as little as possible, because it disrupts the
+ * token on the network (causes a RECON) and requires a significant delay.
+ *
+ * However, it does make sure the card is in a defined state.
+ */
+static int com20020_reset(struct net_device *dev, int really_reset)
+{
+	struct arcnet_local *lp = netdev_priv(dev);
+	u_int ioaddr = dev->base_addr;
+	u_char inbyte;
+
+	arc_printk(D_DEBUG, dev, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n",
+		   __FILE__, __LINE__, __func__, dev, lp, dev->name);
+	arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
+		   dev->name, arcnet_inb(ioaddr, COM20020_REG_R_STATUS));
+
+	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+	lp->config |= (lp->timeout << 3) | (lp->backplane << 2);
+	/* power-up defaults */
+	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
+	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+
+	if (really_reset) {
+		/* reset the card */
+		arcnet_outb(lp->config | RESETcfg, ioaddr, COM20020_REG_W_CONFIG);
+		udelay(5);
+		arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
+		mdelay(RESETtime * 2);
+				/* COM20020 seems to be slower sometimes */
+	}
+	/* clear flags & end reset */
+	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+	arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear,
+		    ioaddr, COM20020_REG_W_COMMAND);
+
+	/* verify that the ARCnet signature byte is present */
+	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+
+	com20020_copy_from_card(dev, 0, 0, &inbyte, 1);
+	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+	if (inbyte != TESTvalue) {
+		arc_printk(D_DEBUG, dev, "%s: %d: %s\n",
+			   __FILE__, __LINE__, __func__);
+		arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");
+		return 1;
+	}
+	/* enable extended (512-byte) packets */
+	arcnet_outb(CONFIGcmd | EXTconf, ioaddr, COM20020_REG_W_COMMAND);
+
+	arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+
+	/* done!  return success. */
+	return 0;
+}
+
+static void com20020_setmask(struct net_device *dev, int mask)
+{
+	u_int ioaddr = dev->base_addr;
+
+	arc_printk(D_DURING, dev, "Setting mask to %x at %x\n", mask, ioaddr);
+	arcnet_outb(mask, ioaddr, COM20020_REG_W_INTMASK);
+}
+
+static void com20020_command(struct net_device *dev, int cmd)
+{
+	u_int ioaddr = dev->base_addr;
+
+	arcnet_outb(cmd, ioaddr, COM20020_REG_W_COMMAND);
+}
+
+static int com20020_status(struct net_device *dev)
+{
+	u_int ioaddr = dev->base_addr;
+
+	return arcnet_inb(ioaddr, COM20020_REG_R_STATUS) +
+		(arcnet_inb(ioaddr, COM20020_REG_R_DIAGSTAT) << 8);
+}
+
+static void com20020_close(struct net_device *dev)
+{
+	struct arcnet_local *lp = netdev_priv(dev);
+	int ioaddr = dev->base_addr;
+
+	/* disable transmitter */
+	lp->config &= ~TXENcfg;
+	arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
+}
+
+/* Set or clear the multicast filter for this adaptor.
+ * num_addrs == -1    Promiscuous mode, receive all packets
+ * num_addrs == 0       Normal mode, clear multicast list
+ * num_addrs > 0        Multicast mode, receive normal and MC packets, and do
+ *                      best-effort filtering.
+ *      FIXME - do multicast stuff, not just promiscuous.
+ */
+static void com20020_set_mc_list(struct net_device *dev)
+{
+	struct arcnet_local *lp = netdev_priv(dev);
+	int ioaddr = dev->base_addr;
+
+	if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) {
+		/* Enable promiscuous mode */
+		if (!(lp->setup & PROMISCset))
+			arc_printk(D_NORMAL, dev, "Setting promiscuous flag...\n");
+		com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
+		lp->setup |= PROMISCset;
+		arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
+	} else {
+		/* Disable promiscuous mode, use normal mode */
+		if ((lp->setup & PROMISCset))
+			arc_printk(D_NORMAL, dev, "Resetting promiscuous flag...\n");
+		com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
+		lp->setup &= ~PROMISCset;
+		arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
+	}
+}
+
+#if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) || \
+    defined(CONFIG_ARCNET_COM20020_ISA_MODULE) || \
+    defined(CONFIG_ARCNET_COM20020_CS_MODULE)
+EXPORT_SYMBOL(com20020_check);
+EXPORT_SYMBOL(com20020_found);
+EXPORT_SYMBOL(com20020_netdev_ops);
+#endif
+
+MODULE_LICENSE("GPL");
+
+#ifdef MODULE
+
+static int __init com20020_module_init(void)
+{
+	if (BUGLVL(D_NORMAL))
+		pr_info("%s\n", "COM20020 chipset support (by David Woodhouse et al.)");
+	return 0;
+}
+
+static void __exit com20020_module_exit(void)
+{
+}
+module_init(com20020_module_init);
+module_exit(com20020_module_exit);
+#endif				/* MODULE */