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, 852 insertions, 0 deletions

diff --git a/drivers/char/applicom.c b/drivers/char/applicom.c
new file mode 100644
index 000000000..36203d3fa
--- /dev/null
+++ b/drivers/char/applicom.c
@@ -0,0 +1,852 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Derived from Applicom driver ac.c for SCO Unix                            */
+/* Ported by David Woodhouse, Axiom (Cambridge) Ltd.                         */
+/* dwmw2@infradead.org 30/8/98                                               */
+/* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $			     */
+/* This module is for Linux 2.1 and 2.2 series kernels.                      */
+/*****************************************************************************/
+/* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt  */
+/* ceci pour reseter correctement apres une sortie sauvage                   */
+/* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption,     */
+/* LoopCount n'etait pas initialise a 0.                                     */
+/* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte   */
+/*           pour liberer le bus                                             */
+/* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */
+/* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter  */
+/* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3    */
+/* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes       */
+/* addresses de base des cartes, IOCTL 6 plus complet                         */
+/* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification  */
+/* de code autre que le texte V2.6.1 en V2.8.0                               */
+/*****************************************************************************/
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/sched/signal.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/mutex.h>
+#include <linux/miscdevice.h>
+#include <linux/pci.h>
+#include <linux/wait.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/nospec.h>
+
+#include <asm/io.h>
+#include <linux/uaccess.h>
+
+#include "applicom.h"
+
+
+/* NOTE: We use for loops with {write,read}b() instead of 
+   memcpy_{from,to}io throughout this driver. This is because
+   the board doesn't correctly handle word accesses - only
+   bytes. 
+*/
+
+
+#undef DEBUG
+
+#define MAX_BOARD 8		/* maximum of pc board possible */
+#define MAX_ISA_BOARD 4
+#define LEN_RAM_IO 0x800
+
+#ifndef PCI_VENDOR_ID_APPLICOM
+#define PCI_VENDOR_ID_APPLICOM                0x1389
+#define PCI_DEVICE_ID_APPLICOM_PCIGENERIC     0x0001
+#define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
+#define PCI_DEVICE_ID_APPLICOM_PCI2000PFB     0x0003
+#endif
+
+static DEFINE_MUTEX(ac_mutex);
+static char *applicom_pci_devnames[] = {
+	"PCI board",
+	"PCI2000IBS / PCI2000CAN",
+	"PCI2000PFB"
+};
+
+static const struct pci_device_id applicom_pci_tbl[] = {
+	{ PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) },
+	{ PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) },
+	{ PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) },
+	{ 0 }
+};
+MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
+
+MODULE_AUTHOR("David Woodhouse & Applicom International");
+MODULE_DESCRIPTION("Driver for Applicom Profibus card");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(AC_MINOR);
+
+static struct applicom_board {
+	unsigned long PhysIO;
+	void __iomem *RamIO;
+	wait_queue_head_t FlagSleepSend;
+	long irq;
+	spinlock_t mutex;
+} apbs[MAX_BOARD];
+
+static unsigned int irq;	/* interrupt number IRQ       */
+static unsigned long mem;	/* physical segment of board  */
+
+module_param_hw(irq, uint, irq, 0);
+MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
+module_param_hw(mem, ulong, iomem, 0);
+MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
+
+static unsigned int numboards;	/* number of installed boards */
+static volatile unsigned char Dummy;
+static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
+static unsigned int WriteErrorCount;	/* number of write error      */
+static unsigned int ReadErrorCount;	/* number of read error       */
+static unsigned int DeviceErrorCount;	/* number of device error     */
+
+static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
+static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
+static long ac_ioctl(struct file *, unsigned int, unsigned long);
+static irqreturn_t ac_interrupt(int, void *);
+
+static const struct file_operations ac_fops = {
+	.owner = THIS_MODULE,
+	.llseek = no_llseek,
+	.read = ac_read,
+	.write = ac_write,
+	.unlocked_ioctl = ac_ioctl,
+};
+
+static struct miscdevice ac_miscdev = {
+	AC_MINOR,
+	"ac",
+	&ac_fops
+};
+
+static int dummy;	/* dev_id for request_irq() */
+
+static int ac_register_board(unsigned long physloc, void __iomem *loc, 
+		      unsigned char boardno)
+{
+	volatile unsigned char byte_reset_it;
+
+	if((readb(loc + CONF_END_TEST)     != 0x00) ||
+	   (readb(loc + CONF_END_TEST + 1) != 0x55) ||
+	   (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
+	   (readb(loc + CONF_END_TEST + 3) != 0xFF))
+		return 0;
+
+	if (!boardno)
+		boardno = readb(loc + NUMCARD_OWNER_TO_PC);
+
+	if (!boardno || boardno > MAX_BOARD) {
+		printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
+		       boardno, physloc, MAX_BOARD);
+		return 0;
+	}
+
+	if (apbs[boardno - 1].RamIO) {
+		printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n", 
+		       boardno, physloc, boardno, apbs[boardno-1].PhysIO);
+		return 0;
+	}
+
+	boardno--;
+
+	apbs[boardno].PhysIO = physloc;
+	apbs[boardno].RamIO = loc;
+	init_waitqueue_head(&apbs[boardno].FlagSleepSend);
+	spin_lock_init(&apbs[boardno].mutex);
+	byte_reset_it = readb(loc + RAM_IT_TO_PC);
+
+	numboards++;
+	return boardno + 1;
+}
+
+static void __exit applicom_exit(void)
+{
+	unsigned int i;
+
+	misc_deregister(&ac_miscdev);
+
+	for (i = 0; i < MAX_BOARD; i++) {
+
+		if (!apbs[i].RamIO)
+			continue;
+
+		if (apbs[i].irq)
+			free_irq(apbs[i].irq, &dummy);
+
+		iounmap(apbs[i].RamIO);
+	}
+}
+
+static int __init applicom_init(void)
+{
+	int i, numisa = 0;
+	struct pci_dev *dev = NULL;
+	void __iomem *RamIO;
+	int boardno, ret;
+
+	printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
+
+	/* No mem and irq given - check for a PCI card */
+
+	while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
+
+		if (!pci_match_id(applicom_pci_tbl, dev))
+			continue;
+		
+		if (pci_enable_device(dev))
+			return -EIO;
+
+		RamIO = ioremap(pci_resource_start(dev, 0), LEN_RAM_IO);
+
+		if (!RamIO) {
+			printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
+				"space at 0x%llx\n",
+				(unsigned long long)pci_resource_start(dev, 0));
+			pci_disable_device(dev);
+			return -EIO;
+		}
+
+		printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
+		       applicom_pci_devnames[dev->device-1],
+			   (unsigned long long)pci_resource_start(dev, 0),
+		       dev->irq);
+
+		boardno = ac_register_board(pci_resource_start(dev, 0),
+				RamIO, 0);
+		if (!boardno) {
+			printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
+			iounmap(RamIO);
+			pci_disable_device(dev);
+			continue;
+		}
+
+		if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
+			printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
+			iounmap(RamIO);
+			pci_disable_device(dev);
+			apbs[boardno - 1].RamIO = NULL;
+			continue;
+		}
+
+		/* Enable interrupts. */
+
+		writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
+
+		apbs[boardno - 1].irq = dev->irq;
+	}
+
+	/* Finished with PCI cards. If none registered, 
+	 * and there was no mem/irq specified, exit */
+
+	if (!mem || !irq) {
+		if (numboards)
+			goto fin;
+		else {
+			printk(KERN_INFO "ac.o: No PCI boards found.\n");
+			printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
+			return -ENXIO;
+		}
+	}
+
+	/* Now try the specified ISA cards */
+
+	for (i = 0; i < MAX_ISA_BOARD; i++) {
+		RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
+
+		if (!RamIO) {
+			printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
+			continue;
+		}
+
+		if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
+						  RamIO,i+1))) {
+			iounmap(RamIO);
+			continue;
+		}
+
+		printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
+
+		if (!numisa) {
+			if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
+				printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
+				iounmap(RamIO);
+				apbs[boardno - 1].RamIO = NULL;
+			}
+			else
+				apbs[boardno - 1].irq = irq;
+		}
+		else
+			apbs[boardno - 1].irq = 0;
+
+		numisa++;
+	}
+
+	if (!numisa)
+		printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
+				"at mem 0x%lx\n", mem);
+
+ fin:
+	init_waitqueue_head(&FlagSleepRec);
+
+	WriteErrorCount = 0;
+	ReadErrorCount = 0;
+	DeviceErrorCount = 0;
+
+	if (numboards) {
+		ret = misc_register(&ac_miscdev);
+		if (ret) {
+			printk(KERN_WARNING "ac.o: Unable to register misc device\n");
+			goto out;
+		}
+		for (i = 0; i < MAX_BOARD; i++) {
+			int serial;
+			char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
+
+			if (!apbs[i].RamIO)
+				continue;
+
+			for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
+				boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
+
+			boardname[serial] = 0;
+
+
+			printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
+			       i+1, boardname,
+			       (int)(readb(apbs[i].RamIO + VERS) >> 4),
+			       (int)(readb(apbs[i].RamIO + VERS) & 0xF));
+			
+			serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 
+				(readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 
+				(readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
+
+			if (serial != 0)
+				printk(" S/N %d\n", serial);
+			else
+				printk("\n");
+		}
+		return 0;
+	}
+
+	else
+		return -ENXIO;
+
+out:
+	for (i = 0; i < MAX_BOARD; i++) {
+		if (!apbs[i].RamIO)
+			continue;
+		if (apbs[i].irq)
+			free_irq(apbs[i].irq, &dummy);
+		iounmap(apbs[i].RamIO);
+	}
+	return ret;
+}
+
+module_init(applicom_init);
+module_exit(applicom_exit);
+
+
+static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
+{
+	unsigned int NumCard;	/* Board number 1 -> 8           */
+	unsigned int IndexCard;	/* Index board number 0 -> 7     */
+	unsigned char TicCard;	/* Board TIC to send             */
+	unsigned long flags;	/* Current priority              */
+	struct st_ram_io st_loc;
+	struct mailbox tmpmailbox;
+#ifdef DEBUG
+	int c;
+#endif
+	DECLARE_WAITQUEUE(wait, current);
+
+	if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
+		static int warncount = 5;
+		if (warncount) {
+			printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
+			       count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
+			warncount--;
+		}
+		return -EINVAL;
+	}
+
+	if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) 
+		return -EFAULT;
+	
+	if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
+			  sizeof(struct mailbox))) 
+		return -EFAULT;
+
+	NumCard = st_loc.num_card;	/* board number to send          */
+	TicCard = st_loc.tic_des_from_pc;	/* tic number to send            */
+	IndexCard = NumCard - 1;
+
+	if (IndexCard >= MAX_BOARD)
+		return -EINVAL;
+	IndexCard = array_index_nospec(IndexCard, MAX_BOARD);
+
+	if (!apbs[IndexCard].RamIO)
+		return -EINVAL;
+
+#ifdef DEBUG
+	printk("Write to applicom card #%d. struct st_ram_io follows:",
+	       IndexCard+1);
+
+		for (c = 0; c < sizeof(struct st_ram_io);) {
+		
+			printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
+
+			for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
+				printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
+			}
+		}
+
+		printk("\nstruct mailbox follows:");
+
+		for (c = 0; c < sizeof(struct mailbox);) {
+			printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
+
+			for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
+				printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
+			}
+		}
+
+		printk("\n");
+#endif
+
+	spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
+
+	/* Test octet ready correct */
+	if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { 
+		Dummy = readb(apbs[IndexCard].RamIO + VERS);
+		spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
+		printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
+		       IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
+		DeviceErrorCount++;
+		return -EIO;
+	}
+	
+	/* Place ourselves on the wait queue */
+	set_current_state(TASK_INTERRUPTIBLE);
+	add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
+
+	/* Check whether the card is ready for us */
+	while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
+		Dummy = readb(apbs[IndexCard].RamIO + VERS);
+		/* It's busy. Sleep. */
+
+		spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
+		schedule();
+		if (signal_pending(current)) {
+			remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
+					  &wait);
+			return -EINTR;
+		}
+		spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
+		set_current_state(TASK_INTERRUPTIBLE);
+	}
+
+	/* We may not have actually slept */
+	set_current_state(TASK_RUNNING);
+	remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
+
+	writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
+
+	/* Which is best - lock down the pages with rawio and then
+	   copy directly, or use bounce buffers? For now we do the latter 
+	   because it works with 2.2 still */
+	{
+		unsigned char *from = (unsigned char *) &tmpmailbox;
+		void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
+		int c;
+
+		for (c = 0; c < sizeof(struct mailbox); c++)
+			writeb(*(from++), to++);
+	}
+
+	writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
+	writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
+	writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
+	writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
+	writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
+	writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
+	Dummy = readb(apbs[IndexCard].RamIO + VERS);
+	spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
+	return 0;
+}
+
+static int do_ac_read(int IndexCard, char __user *buf,
+		struct st_ram_io *st_loc, struct mailbox *mailbox)
+{
+	void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
+	unsigned char *to = (unsigned char *)mailbox;
+#ifdef DEBUG
+	int c;
+#endif
+
+	st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
+	st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
+
+
+	{
+		int c;
+
+		for (c = 0; c < sizeof(struct mailbox); c++)
+			*(to++) = readb(from++);
+	}
+	writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
+	writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
+	writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
+	writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), 
+	       apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
+	writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
+	writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
+	writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
+	Dummy = readb(apbs[IndexCard].RamIO + VERS);
+
+#ifdef DEBUG
+		printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
+
+		for (c = 0; c < sizeof(struct st_ram_io);) {
+			printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
+
+			for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
+				printk(" %2.2X", ((unsigned char *)st_loc)[c]);
+			}
+		}
+
+		printk("\nstruct mailbox follows:");
+
+		for (c = 0; c < sizeof(struct mailbox);) {
+			printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
+
+			for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
+				printk(" %2.2X", ((unsigned char *)mailbox)[c]);
+			}
+		}
+		printk("\n");
+#endif
+	return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
+}
+
+static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
+{
+	unsigned long flags;
+	unsigned int i;
+	unsigned char tmp;
+	int ret = 0;
+	DECLARE_WAITQUEUE(wait, current);
+#ifdef DEBUG
+	int loopcount=0;
+#endif
+	/* No need to ratelimit this. Only root can trigger it anyway */
+	if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
+		printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
+			count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
+		return -EINVAL;
+	}
+	
+	while(1) {
+		/* Stick ourself on the wait queue */
+		set_current_state(TASK_INTERRUPTIBLE);
+		add_wait_queue(&FlagSleepRec, &wait);
+		
+		/* Scan each board, looking for one which has a packet for us */
+		for (i=0; i < MAX_BOARD; i++) {
+			if (!apbs[i].RamIO)
+				continue;
+			spin_lock_irqsave(&apbs[i].mutex, flags);
+			
+			tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
+			
+			if (tmp == 2) {
+				struct st_ram_io st_loc;
+				struct mailbox mailbox;
+
+				/* Got a packet for us */
+				memset(&st_loc, 0, sizeof(st_loc));
+				ret = do_ac_read(i, buf, &st_loc, &mailbox);
+				spin_unlock_irqrestore(&apbs[i].mutex, flags);
+				set_current_state(TASK_RUNNING);
+				remove_wait_queue(&FlagSleepRec, &wait);
+
+				if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
+					return -EFAULT;
+				if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
+					return -EFAULT;
+				return tmp;
+			}
+			
+			if (tmp > 2) {
+				/* Got an error */
+				Dummy = readb(apbs[i].RamIO + VERS);
+				
+				spin_unlock_irqrestore(&apbs[i].mutex, flags);
+				set_current_state(TASK_RUNNING);
+				remove_wait_queue(&FlagSleepRec, &wait);
+				
+				printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
+				       i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
+				DeviceErrorCount++;
+				return -EIO;
+			}
+			
+			/* Nothing for us. Try the next board */
+			Dummy = readb(apbs[i].RamIO + VERS);
+			spin_unlock_irqrestore(&apbs[i].mutex, flags);
+			
+		} /* per board */
+
+		/* OK - No boards had data for us. Sleep now */
+
+		schedule();
+		remove_wait_queue(&FlagSleepRec, &wait);
+
+		if (signal_pending(current))
+			return -EINTR;
+
+#ifdef DEBUG
+		if (loopcount++ > 2) {
+			printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
+		}
+#endif
+	} 
+}
+
+static irqreturn_t ac_interrupt(int vec, void *dev_instance)
+{
+	unsigned int i;
+	unsigned int FlagInt;
+	unsigned int LoopCount;
+	int handled = 0;
+
+	//    printk("Applicom interrupt on IRQ %d occurred\n", vec);
+
+	LoopCount = 0;
+
+	do {
+		FlagInt = 0;
+		for (i = 0; i < MAX_BOARD; i++) {
+			
+			/* Skip if this board doesn't exist */
+			if (!apbs[i].RamIO)
+				continue;
+
+			spin_lock(&apbs[i].mutex);
+
+			/* Skip if this board doesn't want attention */
+			if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
+				spin_unlock(&apbs[i].mutex);
+				continue;
+			}
+
+			handled = 1;
+			FlagInt = 1;
+			writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
+
+			if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
+				printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
+				       i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
+				DeviceErrorCount++;
+			}
+
+			if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 
+			   (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
+				
+				printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
+				       i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
+				DeviceErrorCount++;
+			}
+
+			if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) {	/* mailbox sent by the card ?   */
+				if (waitqueue_active(&FlagSleepRec)) {
+				wake_up_interruptible(&FlagSleepRec);
+			}
+			}
+
+			if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) {	/* ram i/o free for write by pc ? */
+				if (waitqueue_active(&apbs[i].FlagSleepSend)) {	/* process sleep during read ?    */
+					wake_up_interruptible(&apbs[i].FlagSleepSend);
+				}
+			}
+			Dummy = readb(apbs[i].RamIO + VERS);
+
+			if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
+				/* There's another int waiting on this card */
+				spin_unlock(&apbs[i].mutex);
+				i--;
+			} else {
+				spin_unlock(&apbs[i].mutex);
+			}
+		}
+		if (FlagInt)
+			LoopCount = 0;
+		else
+			LoopCount++;
+	} while(LoopCount < 2);
+	return IRQ_RETVAL(handled);
+}
+
+
+
+static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+     
+{				/* @ ADG ou ATO selon le cas */
+	int i;
+	unsigned char IndexCard;
+	void __iomem *pmem;
+	int ret = 0;
+	static int warncount = 10;
+	volatile unsigned char byte_reset_it;
+	struct st_ram_io *adgl;
+	void __user *argp = (void __user *)arg;
+
+	/* In general, the device is only openable by root anyway, so we're not
+	   particularly concerned that bogus ioctls can flood the console. */
+
+	adgl = memdup_user(argp, sizeof(struct st_ram_io));
+	if (IS_ERR(adgl))
+		return PTR_ERR(adgl);
+
+	mutex_lock(&ac_mutex);	
+	IndexCard = adgl->num_card-1;
+	 
+	if (cmd != 6 && IndexCard >= MAX_BOARD)
+		goto err;
+	IndexCard = array_index_nospec(IndexCard, MAX_BOARD);
+
+	if (cmd != 6 && !apbs[IndexCard].RamIO)
+		goto err;
+
+	switch (cmd) {
+		
+	case 0:
+		pmem = apbs[IndexCard].RamIO;
+		for (i = 0; i < sizeof(struct st_ram_io); i++)
+			((unsigned char *)adgl)[i]=readb(pmem++);
+		if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
+			ret = -EFAULT;
+		break;
+	case 1:
+		pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
+		for (i = 0; i < 4; i++)
+			adgl->conf_end_test[i] = readb(pmem++);
+		for (i = 0; i < 2; i++)
+			adgl->error_code[i] = readb(pmem++);
+		for (i = 0; i < 4; i++)
+			adgl->parameter_error[i] = readb(pmem++);
+		pmem = apbs[IndexCard].RamIO + VERS;
+		adgl->vers = readb(pmem);
+		pmem = apbs[IndexCard].RamIO + TYPE_CARD;
+		for (i = 0; i < 20; i++)
+			adgl->reserv1[i] = readb(pmem++);
+		*(int *)&adgl->reserv1[20] =  
+			(readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + 
+			(readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + 
+			(readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
+
+		if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
+			ret = -EFAULT;
+		break;
+	case 2:
+		pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
+		for (i = 0; i < 10; i++)
+			writeb(0xff, pmem++);
+		writeb(adgl->data_from_pc_ready, 
+		       apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
+
+		writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
+		
+		for (i = 0; i < MAX_BOARD; i++) {
+			if (apbs[i].RamIO) {
+				byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
+			}
+		}
+		break;
+	case 3:
+		pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
+		writeb(adgl->tic_des_from_pc, pmem);
+		break;
+	case 4:
+		pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
+		adgl->tic_owner_to_pc     = readb(pmem++);
+		adgl->numcard_owner_to_pc = readb(pmem);
+		if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
+			ret = -EFAULT;
+		break;
+	case 5:
+		writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
+		writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
+		writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
+		writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
+		writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
+		break;
+	case 6:
+		printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
+		printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
+		printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
+		printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
+		for (i = 0; i < MAX_BOARD; i++) {
+			int serial;
+			char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
+
+			if (!apbs[i].RamIO)
+				continue;
+
+			for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
+				boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
+			boardname[serial] = 0;
+
+			printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
+			       i+1,
+			       (int)(readb(apbs[i].RamIO + VERS) >> 4),
+			       (int)(readb(apbs[i].RamIO + VERS) & 0xF),
+			       boardname);
+
+
+			serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 
+				(readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 
+				(readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
+
+			if (serial != 0)
+				printk(" S/N %d\n", serial);
+			else
+				printk("\n");
+		}
+		if (DeviceErrorCount != 0)
+			printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
+		if (ReadErrorCount != 0)
+			printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
+		if (WriteErrorCount != 0)
+			printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
+		if (waitqueue_active(&FlagSleepRec))
+			printk(KERN_INFO "Process in read pending\n");
+		for (i = 0; i < MAX_BOARD; i++) {
+			if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
+				printk(KERN_INFO "Process in write pending board %d\n",i+1);
+		}
+		break;
+	default:
+		ret = -ENOTTY;
+		break;
+	}
+	Dummy = readb(apbs[IndexCard].RamIO + VERS);
+	kfree(adgl);
+	mutex_unlock(&ac_mutex);
+	return ret;
+
+err:
+	if (warncount) {
+		pr_warn("APPLICOM driver IOCTL, bad board number %d\n",
+			(int)IndexCard + 1);
+		warncount--;
+	}
+	kfree(adgl);
+	mutex_unlock(&ac_mutex);
+	return -EINVAL;
+
+}
+