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, 819 insertions, 0 deletions

diff --git a/drivers/watchdog/pcwd_pci.c b/drivers/watchdog/pcwd_pci.c
new file mode 100644
index 000000000..54d86fcb1
--- /dev/null
+++ b/drivers/watchdog/pcwd_pci.c
@@ -0,0 +1,819 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *	Berkshire PCI-PC Watchdog Card Driver
+ *
+ *	(c) Copyright 2003-2007 Wim Van Sebroeck <wim@iguana.be>.
+ *
+ *	Based on source code of the following authors:
+ *	  Ken Hollis <kenji@bitgate.com>,
+ *	  Lindsay Harris <lindsay@bluegum.com>,
+ *	  Alan Cox <alan@lxorguk.ukuu.org.uk>,
+ *	  Matt Domsch <Matt_Domsch@dell.com>,
+ *	  Rob Radez <rob@osinvestor.com>
+ *
+ *	Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor
+ *	provide warranty for any of this software. This material is
+ *	provided "AS-IS" and at no charge.
+ */
+
+/*
+ *	A bells and whistles driver is available from:
+ *	http://www.kernel.org/pub/linux/kernel/people/wim/pcwd/pcwd_pci/
+ *
+ *	More info available at
+ *	http://www.berkprod.com/ or http://www.pcwatchdog.com/
+ */
+
+/*
+ *	Includes, defines, variables, module parameters, ...
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>	/* For module specific items */
+#include <linux/moduleparam.h>	/* For new moduleparam's */
+#include <linux/types.h>	/* For standard types (like size_t) */
+#include <linux/errno.h>	/* For the -ENODEV/... values */
+#include <linux/kernel.h>	/* For printk/panic/... */
+#include <linux/delay.h>	/* For mdelay function */
+#include <linux/miscdevice.h>	/* For struct miscdevice */
+#include <linux/watchdog.h>	/* For the watchdog specific items */
+#include <linux/notifier.h>	/* For notifier support */
+#include <linux/reboot.h>	/* For reboot_notifier stuff */
+#include <linux/init.h>		/* For __init/__exit/... */
+#include <linux/fs.h>		/* For file operations */
+#include <linux/pci.h>		/* For pci functions */
+#include <linux/ioport.h>	/* For io-port access */
+#include <linux/spinlock.h>	/* For spin_lock/spin_unlock/... */
+#include <linux/uaccess.h>	/* For copy_to_user/put_user/... */
+#include <linux/io.h>		/* For inb/outb/... */
+
+/* Module and version information */
+#define WATCHDOG_VERSION "1.03"
+#define WATCHDOG_DRIVER_NAME "PCI-PC Watchdog"
+#define WATCHDOG_NAME "pcwd_pci"
+#define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION
+
+/* Stuff for the PCI ID's  */
+#ifndef PCI_VENDOR_ID_QUICKLOGIC
+#define PCI_VENDOR_ID_QUICKLOGIC    0x11e3
+#endif
+
+#ifndef PCI_DEVICE_ID_WATCHDOG_PCIPCWD
+#define PCI_DEVICE_ID_WATCHDOG_PCIPCWD 0x5030
+#endif
+
+/*
+ * These are the defines that describe the control status bits for the
+ * PCI-PC Watchdog card.
+ */
+/* Port 1 : Control Status #1 */
+#define WD_PCI_WTRP		0x01	/* Watchdog Trip status */
+#define WD_PCI_HRBT		0x02	/* Watchdog Heartbeat */
+#define WD_PCI_TTRP		0x04	/* Temperature Trip status */
+#define WD_PCI_RL2A		0x08	/* Relay 2 Active */
+#define WD_PCI_RL1A		0x10	/* Relay 1 Active */
+#define WD_PCI_R2DS		0x40	/* Relay 2 Disable Temperature-trip /
+									reset */
+#define WD_PCI_RLY2		0x80	/* Activate Relay 2 on the board */
+/* Port 2 : Control Status #2 */
+#define WD_PCI_WDIS		0x10	/* Watchdog Disable */
+#define WD_PCI_ENTP		0x20	/* Enable Temperature Trip Reset */
+#define WD_PCI_WRSP		0x40	/* Watchdog wrote response */
+#define WD_PCI_PCMD		0x80	/* PC has sent command */
+
+/* according to documentation max. time to process a command for the pci
+ * watchdog card is 100 ms, so we give it 150 ms to do it's job */
+#define PCI_COMMAND_TIMEOUT	150
+
+/* Watchdog's internal commands */
+#define CMD_GET_STATUS				0x04
+#define CMD_GET_FIRMWARE_VERSION		0x08
+#define CMD_READ_WATCHDOG_TIMEOUT		0x18
+#define CMD_WRITE_WATCHDOG_TIMEOUT		0x19
+#define CMD_GET_CLEAR_RESET_COUNT		0x84
+
+/* Watchdog's Dip Switch heartbeat values */
+static const int heartbeat_tbl[] = {
+	5,	/* OFF-OFF-OFF	=  5 Sec  */
+	10,	/* OFF-OFF-ON	= 10 Sec  */
+	30,	/* OFF-ON-OFF	= 30 Sec  */
+	60,	/* OFF-ON-ON	=  1 Min  */
+	300,	/* ON-OFF-OFF	=  5 Min  */
+	600,	/* ON-OFF-ON	= 10 Min  */
+	1800,	/* ON-ON-OFF	= 30 Min  */
+	3600,	/* ON-ON-ON	=  1 hour */
+};
+
+/* We can only use 1 card due to the /dev/watchdog restriction */
+static int cards_found;
+
+/* internal variables */
+static int temp_panic;
+static unsigned long is_active;
+static char expect_release;
+/* this is private data for each PCI-PC watchdog card */
+static struct {
+	/* Wether or not the card has a temperature device */
+	int supports_temp;
+	/* The card's boot status */
+	int boot_status;
+	/* The cards I/O address */
+	unsigned long io_addr;
+	/* the lock for io operations */
+	spinlock_t io_lock;
+	/* the PCI-device */
+	struct pci_dev *pdev;
+} pcipcwd_private;
+
+/* module parameters */
+#define QUIET	0	/* Default */
+#define VERBOSE	1	/* Verbose */
+#define DEBUG	2	/* print fancy stuff too */
+static int debug = QUIET;
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)");
+
+#define WATCHDOG_HEARTBEAT 0	/* default heartbeat =
+						delay-time from dip-switches */
+static int heartbeat = WATCHDOG_HEARTBEAT;
+module_param(heartbeat, int, 0);
+MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. "
+	"(0<heartbeat<65536 or 0=delay-time from dip-switches, default="
+				__MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
+
+static bool nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, bool, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
+					__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/*
+ *	Internal functions
+ */
+
+static int send_command(int cmd, int *msb, int *lsb)
+{
+	int got_response, count;
+
+	if (debug >= DEBUG)
+		pr_debug("sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x\n",
+			 cmd, *msb, *lsb);
+
+	spin_lock(&pcipcwd_private.io_lock);
+	/* If a command requires data it should be written first.
+	 * Data for commands with 8 bits of data should be written to port 4.
+	 * Commands with 16 bits of data, should be written as LSB to port 4
+	 * and MSB to port 5.
+	 * After the required data has been written then write the command to
+	 * port 6. */
+	outb_p(*lsb, pcipcwd_private.io_addr + 4);
+	outb_p(*msb, pcipcwd_private.io_addr + 5);
+	outb_p(cmd, pcipcwd_private.io_addr + 6);
+
+	/* wait till the pci card processed the command, signaled by
+	 * the WRSP bit in port 2 and give it a max. timeout of
+	 * PCI_COMMAND_TIMEOUT to process */
+	got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
+	for (count = 0; (count < PCI_COMMAND_TIMEOUT) && (!got_response);
+								count++) {
+		mdelay(1);
+		got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
+	}
+
+	if (debug >= DEBUG) {
+		if (got_response) {
+			pr_debug("time to process command was: %d ms\n",
+				 count);
+		} else {
+			pr_debug("card did not respond on command!\n");
+		}
+	}
+
+	if (got_response) {
+		/* read back response */
+		*lsb = inb_p(pcipcwd_private.io_addr + 4);
+		*msb = inb_p(pcipcwd_private.io_addr + 5);
+
+		/* clear WRSP bit */
+		inb_p(pcipcwd_private.io_addr + 6);
+
+		if (debug >= DEBUG)
+			pr_debug("received following data for cmd=0x%02x: msb=0x%02x lsb=0x%02x\n",
+				 cmd, *msb, *lsb);
+	}
+
+	spin_unlock(&pcipcwd_private.io_lock);
+
+	return got_response;
+}
+
+static inline void pcipcwd_check_temperature_support(void)
+{
+	if (inb_p(pcipcwd_private.io_addr) != 0xF0)
+		pcipcwd_private.supports_temp = 1;
+}
+
+static int pcipcwd_get_option_switches(void)
+{
+	int option_switches;
+
+	option_switches = inb_p(pcipcwd_private.io_addr + 3);
+	return option_switches;
+}
+
+static void pcipcwd_show_card_info(void)
+{
+	int got_fw_rev, fw_rev_major, fw_rev_minor;
+	char fw_ver_str[20];		/* The cards firmware version */
+	int option_switches;
+
+	got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major,
+								&fw_rev_minor);
+	if (got_fw_rev)
+		sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor);
+	else
+		sprintf(fw_ver_str, "<card no answer>");
+
+	/* Get switch settings */
+	option_switches = pcipcwd_get_option_switches();
+
+	pr_info("Found card at port 0x%04x (Firmware: %s) %s temp option\n",
+		(int) pcipcwd_private.io_addr, fw_ver_str,
+		(pcipcwd_private.supports_temp ? "with" : "without"));
+
+	pr_info("Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n",
+		option_switches,
+		((option_switches & 0x10) ? "ON" : "OFF"),
+		((option_switches & 0x08) ? "ON" : "OFF"));
+
+	if (pcipcwd_private.boot_status & WDIOF_CARDRESET)
+		pr_info("Previous reset was caused by the Watchdog card\n");
+
+	if (pcipcwd_private.boot_status & WDIOF_OVERHEAT)
+		pr_info("Card sensed a CPU Overheat\n");
+
+	if (pcipcwd_private.boot_status == 0)
+		pr_info("No previous trip detected - Cold boot or reset\n");
+}
+
+static int pcipcwd_start(void)
+{
+	int stat_reg;
+
+	spin_lock(&pcipcwd_private.io_lock);
+	outb_p(0x00, pcipcwd_private.io_addr + 3);
+	udelay(1000);
+
+	stat_reg = inb_p(pcipcwd_private.io_addr + 2);
+	spin_unlock(&pcipcwd_private.io_lock);
+
+	if (stat_reg & WD_PCI_WDIS) {
+		pr_err("Card timer not enabled\n");
+		return -1;
+	}
+
+	if (debug >= VERBOSE)
+		pr_debug("Watchdog started\n");
+
+	return 0;
+}
+
+static int pcipcwd_stop(void)
+{
+	int stat_reg;
+
+	spin_lock(&pcipcwd_private.io_lock);
+	outb_p(0xA5, pcipcwd_private.io_addr + 3);
+	udelay(1000);
+
+	outb_p(0xA5, pcipcwd_private.io_addr + 3);
+	udelay(1000);
+
+	stat_reg = inb_p(pcipcwd_private.io_addr + 2);
+	spin_unlock(&pcipcwd_private.io_lock);
+
+	if (!(stat_reg & WD_PCI_WDIS)) {
+		pr_err("Card did not acknowledge disable attempt\n");
+		return -1;
+	}
+
+	if (debug >= VERBOSE)
+		pr_debug("Watchdog stopped\n");
+
+	return 0;
+}
+
+static int pcipcwd_keepalive(void)
+{
+	/* Re-trigger watchdog by writing to port 0 */
+	spin_lock(&pcipcwd_private.io_lock);
+	outb_p(0x42, pcipcwd_private.io_addr);	/* send out any data */
+	spin_unlock(&pcipcwd_private.io_lock);
+
+	if (debug >= DEBUG)
+		pr_debug("Watchdog keepalive signal send\n");
+
+	return 0;
+}
+
+static int pcipcwd_set_heartbeat(int t)
+{
+	int t_msb = t / 256;
+	int t_lsb = t % 256;
+
+	if ((t < 0x0001) || (t > 0xFFFF))
+		return -EINVAL;
+
+	/* Write new heartbeat to watchdog */
+	send_command(CMD_WRITE_WATCHDOG_TIMEOUT, &t_msb, &t_lsb);
+
+	heartbeat = t;
+	if (debug >= VERBOSE)
+		pr_debug("New heartbeat: %d\n", heartbeat);
+
+	return 0;
+}
+
+static int pcipcwd_get_status(int *status)
+{
+	int control_status;
+
+	*status = 0;
+	control_status = inb_p(pcipcwd_private.io_addr + 1);
+	if (control_status & WD_PCI_WTRP)
+		*status |= WDIOF_CARDRESET;
+	if (control_status & WD_PCI_TTRP) {
+		*status |= WDIOF_OVERHEAT;
+		if (temp_panic)
+			panic(KBUILD_MODNAME ": Temperature overheat trip!\n");
+	}
+
+	if (debug >= DEBUG)
+		pr_debug("Control Status #1: 0x%02x\n", control_status);
+
+	return 0;
+}
+
+static int pcipcwd_clear_status(void)
+{
+	int control_status;
+	int msb;
+	int reset_counter;
+
+	if (debug >= VERBOSE)
+		pr_info("clearing watchdog trip status & LED\n");
+
+	control_status = inb_p(pcipcwd_private.io_addr + 1);
+
+	if (debug >= DEBUG) {
+		pr_debug("status was: 0x%02x\n", control_status);
+		pr_debug("sending: 0x%02x\n",
+			 (control_status & WD_PCI_R2DS) | WD_PCI_WTRP);
+	}
+
+	/* clear trip status & LED and keep mode of relay 2 */
+	outb_p((control_status & WD_PCI_R2DS) | WD_PCI_WTRP,
+						pcipcwd_private.io_addr + 1);
+
+	/* clear reset counter */
+	msb = 0;
+	reset_counter = 0xff;
+	send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter);
+
+	if (debug >= DEBUG) {
+		pr_debug("reset count was: 0x%02x\n", reset_counter);
+	}
+
+	return 0;
+}
+
+static int pcipcwd_get_temperature(int *temperature)
+{
+	*temperature = 0;
+	if (!pcipcwd_private.supports_temp)
+		return -ENODEV;
+
+	spin_lock(&pcipcwd_private.io_lock);
+	*temperature = inb_p(pcipcwd_private.io_addr);
+	spin_unlock(&pcipcwd_private.io_lock);
+
+	/*
+	 * Convert celsius to fahrenheit, since this was
+	 * the decided 'standard' for this return value.
+	 */
+	*temperature = (*temperature * 9 / 5) + 32;
+
+	if (debug >= DEBUG) {
+		pr_debug("temperature is: %d F\n", *temperature);
+	}
+
+	return 0;
+}
+
+static int pcipcwd_get_timeleft(int *time_left)
+{
+	int msb;
+	int lsb;
+
+	/* Read the time that's left before rebooting */
+	/* Note: if the board is not yet armed then we will read 0xFFFF */
+	send_command(CMD_READ_WATCHDOG_TIMEOUT, &msb, &lsb);
+
+	*time_left = (msb << 8) + lsb;
+
+	if (debug >= VERBOSE)
+		pr_debug("Time left before next reboot: %d\n", *time_left);
+
+	return 0;
+}
+
+/*
+ *	/dev/watchdog handling
+ */
+
+static ssize_t pcipcwd_write(struct file *file, const char __user *data,
+			     size_t len, loff_t *ppos)
+{
+	/* See if we got the magic character 'V' and reload the timer */
+	if (len) {
+		if (!nowayout) {
+			size_t i;
+
+			/* note: just in case someone wrote the magic character
+			 * five months ago... */
+			expect_release = 0;
+
+			/* scan to see whether or not we got the
+			 * magic character */
+			for (i = 0; i != len; i++) {
+				char c;
+				if (get_user(c, data + i))
+					return -EFAULT;
+				if (c == 'V')
+					expect_release = 42;
+			}
+		}
+
+		/* someone wrote to us, we should reload the timer */
+		pcipcwd_keepalive();
+	}
+	return len;
+}
+
+static long pcipcwd_ioctl(struct file *file, unsigned int cmd,
+						unsigned long arg)
+{
+	void __user *argp = (void __user *)arg;
+	int __user *p = argp;
+	static const struct watchdog_info ident = {
+		.options =		WDIOF_OVERHEAT |
+					WDIOF_CARDRESET |
+					WDIOF_KEEPALIVEPING |
+					WDIOF_SETTIMEOUT |
+					WDIOF_MAGICCLOSE,
+		.firmware_version =	1,
+		.identity =		WATCHDOG_DRIVER_NAME,
+	};
+
+	switch (cmd) {
+	case WDIOC_GETSUPPORT:
+		return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
+
+	case WDIOC_GETSTATUS:
+	{
+		int status;
+		pcipcwd_get_status(&status);
+		return put_user(status, p);
+	}
+
+	case WDIOC_GETBOOTSTATUS:
+		return put_user(pcipcwd_private.boot_status, p);
+
+	case WDIOC_GETTEMP:
+	{
+		int temperature;
+
+		if (pcipcwd_get_temperature(&temperature))
+			return -EFAULT;
+
+		return put_user(temperature, p);
+	}
+
+	case WDIOC_SETOPTIONS:
+	{
+		int new_options, retval = -EINVAL;
+
+		if (get_user(new_options, p))
+			return -EFAULT;
+
+		if (new_options & WDIOS_DISABLECARD) {
+			if (pcipcwd_stop())
+				return -EIO;
+			retval = 0;
+		}
+
+		if (new_options & WDIOS_ENABLECARD) {
+			if (pcipcwd_start())
+				return -EIO;
+			retval = 0;
+		}
+
+		if (new_options & WDIOS_TEMPPANIC) {
+			temp_panic = 1;
+			retval = 0;
+		}
+
+		return retval;
+	}
+
+	case WDIOC_KEEPALIVE:
+		pcipcwd_keepalive();
+		return 0;
+
+	case WDIOC_SETTIMEOUT:
+	{
+		int new_heartbeat;
+
+		if (get_user(new_heartbeat, p))
+			return -EFAULT;
+
+		if (pcipcwd_set_heartbeat(new_heartbeat))
+			return -EINVAL;
+
+		pcipcwd_keepalive();
+	}
+		fallthrough;
+
+	case WDIOC_GETTIMEOUT:
+		return put_user(heartbeat, p);
+
+	case WDIOC_GETTIMELEFT:
+	{
+		int time_left;
+
+		if (pcipcwd_get_timeleft(&time_left))
+			return -EFAULT;
+
+		return put_user(time_left, p);
+	}
+
+	default:
+		return -ENOTTY;
+	}
+}
+
+static int pcipcwd_open(struct inode *inode, struct file *file)
+{
+	/* /dev/watchdog can only be opened once */
+	if (test_and_set_bit(0, &is_active)) {
+		if (debug >= VERBOSE)
+			pr_err("Attempt to open already opened device\n");
+		return -EBUSY;
+	}
+
+	/* Activate */
+	pcipcwd_start();
+	pcipcwd_keepalive();
+	return stream_open(inode, file);
+}
+
+static int pcipcwd_release(struct inode *inode, struct file *file)
+{
+	/*
+	 *      Shut off the timer.
+	 */
+	if (expect_release == 42) {
+		pcipcwd_stop();
+	} else {
+		pr_crit("Unexpected close, not stopping watchdog!\n");
+		pcipcwd_keepalive();
+	}
+	expect_release = 0;
+	clear_bit(0, &is_active);
+	return 0;
+}
+
+/*
+ *	/dev/temperature handling
+ */
+
+static ssize_t pcipcwd_temp_read(struct file *file, char __user *data,
+				size_t len, loff_t *ppos)
+{
+	int temperature;
+
+	if (pcipcwd_get_temperature(&temperature))
+		return -EFAULT;
+
+	if (copy_to_user(data, &temperature, 1))
+		return -EFAULT;
+
+	return 1;
+}
+
+static int pcipcwd_temp_open(struct inode *inode, struct file *file)
+{
+	if (!pcipcwd_private.supports_temp)
+		return -ENODEV;
+
+	return stream_open(inode, file);
+}
+
+static int pcipcwd_temp_release(struct inode *inode, struct file *file)
+{
+	return 0;
+}
+
+/*
+ *	Notify system
+ */
+
+static int pcipcwd_notify_sys(struct notifier_block *this, unsigned long code,
+								void *unused)
+{
+	if (code == SYS_DOWN || code == SYS_HALT)
+		pcipcwd_stop();	/* Turn the WDT off */
+
+	return NOTIFY_DONE;
+}
+
+/*
+ *	Kernel Interfaces
+ */
+
+static const struct file_operations pcipcwd_fops = {
+	.owner =	THIS_MODULE,
+	.llseek =	no_llseek,
+	.write =	pcipcwd_write,
+	.unlocked_ioctl = pcipcwd_ioctl,
+	.compat_ioctl = compat_ptr_ioctl,
+	.open =		pcipcwd_open,
+	.release =	pcipcwd_release,
+};
+
+static struct miscdevice pcipcwd_miscdev = {
+	.minor =	WATCHDOG_MINOR,
+	.name =		"watchdog",
+	.fops =		&pcipcwd_fops,
+};
+
+static const struct file_operations pcipcwd_temp_fops = {
+	.owner =	THIS_MODULE,
+	.llseek =	no_llseek,
+	.read =		pcipcwd_temp_read,
+	.open =		pcipcwd_temp_open,
+	.release =	pcipcwd_temp_release,
+};
+
+static struct miscdevice pcipcwd_temp_miscdev = {
+	.minor =	TEMP_MINOR,
+	.name =		"temperature",
+	.fops =		&pcipcwd_temp_fops,
+};
+
+static struct notifier_block pcipcwd_notifier = {
+	.notifier_call =	pcipcwd_notify_sys,
+};
+
+/*
+ *	Init & exit routines
+ */
+
+static int pcipcwd_card_init(struct pci_dev *pdev,
+		const struct pci_device_id *ent)
+{
+	int ret = -EIO;
+
+	cards_found++;
+	if (cards_found == 1)
+		pr_info("%s\n", DRIVER_VERSION);
+
+	if (cards_found > 1) {
+		pr_err("This driver only supports 1 device\n");
+		return -ENODEV;
+	}
+
+	if (pci_enable_device(pdev)) {
+		pr_err("Not possible to enable PCI Device\n");
+		return -ENODEV;
+	}
+
+	if (pci_resource_start(pdev, 0) == 0x0000) {
+		pr_err("No I/O-Address for card detected\n");
+		ret = -ENODEV;
+		goto err_out_disable_device;
+	}
+
+	spin_lock_init(&pcipcwd_private.io_lock);
+	pcipcwd_private.pdev = pdev;
+	pcipcwd_private.io_addr = pci_resource_start(pdev, 0);
+
+	if (pci_request_regions(pdev, WATCHDOG_NAME)) {
+		pr_err("I/O address 0x%04x already in use\n",
+		       (int) pcipcwd_private.io_addr);
+		ret = -EIO;
+		goto err_out_disable_device;
+	}
+
+	/* get the boot_status */
+	pcipcwd_get_status(&pcipcwd_private.boot_status);
+
+	/* clear the "card caused reboot" flag */
+	pcipcwd_clear_status();
+
+	/* disable card */
+	pcipcwd_stop();
+
+	/* Check whether or not the card supports the temperature device */
+	pcipcwd_check_temperature_support();
+
+	/* Show info about the card itself */
+	pcipcwd_show_card_info();
+
+	/* If heartbeat = 0 then we use the heartbeat from the dip-switches */
+	if (heartbeat == 0)
+		heartbeat =
+			heartbeat_tbl[(pcipcwd_get_option_switches() & 0x07)];
+
+	/* Check that the heartbeat value is within it's range ;
+	 * if not reset to the default */
+	if (pcipcwd_set_heartbeat(heartbeat)) {
+		pcipcwd_set_heartbeat(WATCHDOG_HEARTBEAT);
+		pr_info("heartbeat value must be 0<heartbeat<65536, using %d\n",
+			WATCHDOG_HEARTBEAT);
+	}
+
+	ret = register_reboot_notifier(&pcipcwd_notifier);
+	if (ret != 0) {
+		pr_err("cannot register reboot notifier (err=%d)\n", ret);
+		goto err_out_release_region;
+	}
+
+	if (pcipcwd_private.supports_temp) {
+		ret = misc_register(&pcipcwd_temp_miscdev);
+		if (ret != 0) {
+			pr_err("cannot register miscdev on minor=%d (err=%d)\n",
+			       TEMP_MINOR, ret);
+			goto err_out_unregister_reboot;
+		}
+	}
+
+	ret = misc_register(&pcipcwd_miscdev);
+	if (ret != 0) {
+		pr_err("cannot register miscdev on minor=%d (err=%d)\n",
+		       WATCHDOG_MINOR, ret);
+		goto err_out_misc_deregister;
+	}
+
+	pr_info("initialized. heartbeat=%d sec (nowayout=%d)\n",
+		heartbeat, nowayout);
+
+	return 0;
+
+err_out_misc_deregister:
+	if (pcipcwd_private.supports_temp)
+		misc_deregister(&pcipcwd_temp_miscdev);
+err_out_unregister_reboot:
+	unregister_reboot_notifier(&pcipcwd_notifier);
+err_out_release_region:
+	pci_release_regions(pdev);
+err_out_disable_device:
+	pci_disable_device(pdev);
+	return ret;
+}
+
+static void pcipcwd_card_exit(struct pci_dev *pdev)
+{
+	/* Stop the timer before we leave */
+	if (!nowayout)
+		pcipcwd_stop();
+
+	/* Deregister */
+	misc_deregister(&pcipcwd_miscdev);
+	if (pcipcwd_private.supports_temp)
+		misc_deregister(&pcipcwd_temp_miscdev);
+	unregister_reboot_notifier(&pcipcwd_notifier);
+	pci_release_regions(pdev);
+	pci_disable_device(pdev);
+	cards_found--;
+}
+
+static const struct pci_device_id pcipcwd_pci_tbl[] = {
+	{ PCI_VENDOR_ID_QUICKLOGIC, PCI_DEVICE_ID_WATCHDOG_PCIPCWD,
+		PCI_ANY_ID, PCI_ANY_ID, },
+	{ 0 },			/* End of list */
+};
+MODULE_DEVICE_TABLE(pci, pcipcwd_pci_tbl);
+
+static struct pci_driver pcipcwd_driver = {
+	.name		= WATCHDOG_NAME,
+	.id_table	= pcipcwd_pci_tbl,
+	.probe		= pcipcwd_card_init,
+	.remove		= pcipcwd_card_exit,
+};
+
+module_pci_driver(pcipcwd_driver);
+
+MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>");
+MODULE_DESCRIPTION("Berkshire PCI-PC Watchdog driver");
+MODULE_LICENSE("GPL");