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, 1022 insertions, 0 deletions

diff --git a/tools/firewire/nosy-dump.c b/tools/firewire/nosy-dump.c
new file mode 100644
index 000000000..156e0356e
--- /dev/null
+++ b/tools/firewire/nosy-dump.c
@@ -0,0 +1,1022 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * nosy-dump - Interface to snoop mode driver for TI PCILynx 1394 controllers
+ * Copyright (C) 2002-2006 Kristian Høgsberg
+ */
+
+#include <byteswap.h>
+#include <endian.h>
+#include <fcntl.h>
+#include <linux/firewire-constants.h>
+#include <poll.h>
+#include <popt.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include "list.h"
+#include "nosy-dump.h"
+#include "nosy-user.h"
+
+enum {
+	PACKET_FIELD_DETAIL		= 0x01,
+	PACKET_FIELD_DATA_LENGTH	= 0x02,
+	/* Marks the fields we print in transaction view. */
+	PACKET_FIELD_TRANSACTION	= 0x04,
+};
+
+static void print_packet(uint32_t *data, size_t length);
+static void decode_link_packet(struct link_packet *packet, size_t length,
+			       int include_flags, int exclude_flags);
+static int run = 1;
+sig_t sys_sigint_handler;
+
+static char *option_nosy_device = "/dev/nosy";
+static char *option_view = "packet";
+static char *option_output;
+static char *option_input;
+static int option_hex;
+static int option_iso;
+static int option_cycle_start;
+static int option_version;
+static int option_verbose;
+
+enum {
+	VIEW_TRANSACTION,
+	VIEW_PACKET,
+	VIEW_STATS,
+};
+
+static const struct poptOption options[] = {
+	{
+		.longName	= "device",
+		.shortName	= 'd',
+		.argInfo	= POPT_ARG_STRING,
+		.arg		= &option_nosy_device,
+		.descrip	= "Path to nosy device.",
+		.argDescrip	= "DEVICE"
+	},
+	{
+		.longName	= "view",
+		.argInfo	= POPT_ARG_STRING,
+		.arg		= &option_view,
+		.descrip	= "Specify view of bus traffic: packet, transaction or stats.",
+		.argDescrip	= "VIEW"
+	},
+	{
+		.longName	= "hex",
+		.shortName	= 'x',
+		.argInfo	= POPT_ARG_NONE,
+		.arg		= &option_hex,
+		.descrip	= "Print each packet in hex.",
+	},
+	{
+		.longName	= "iso",
+		.argInfo	= POPT_ARG_NONE,
+		.arg		= &option_iso,
+		.descrip	= "Print iso packets.",
+	},
+	{
+		.longName	= "cycle-start",
+		.argInfo	= POPT_ARG_NONE,
+		.arg		= &option_cycle_start,
+		.descrip	= "Print cycle start packets.",
+	},
+	{
+		.longName	= "verbose",
+		.shortName	= 'v',
+		.argInfo	= POPT_ARG_NONE,
+		.arg		= &option_verbose,
+		.descrip	= "Verbose packet view.",
+	},
+	{
+		.longName	= "output",
+		.shortName	= 'o',
+		.argInfo	= POPT_ARG_STRING,
+		.arg		= &option_output,
+		.descrip	= "Log to output file.",
+		.argDescrip	= "FILENAME"
+	},
+	{
+		.longName	= "input",
+		.shortName	= 'i',
+		.argInfo	= POPT_ARG_STRING,
+		.arg		= &option_input,
+		.descrip	= "Decode log from file.",
+		.argDescrip	= "FILENAME"
+	},
+	{
+		.longName	= "version",
+		.argInfo	= POPT_ARG_NONE,
+		.arg		= &option_version,
+		.descrip	= "Specify print version info.",
+	},
+	POPT_AUTOHELP
+	POPT_TABLEEND
+};
+
+/* Allow all ^C except the first to interrupt the program in the usual way. */
+static void
+sigint_handler(int signal_num)
+{
+	if (run == 1) {
+		run = 0;
+		signal(SIGINT, SIG_DFL);
+	}
+}
+
+static struct subaction *
+subaction_create(uint32_t *data, size_t length)
+{
+	struct subaction *sa;
+
+	/* we put the ack in the subaction struct for easy access. */
+	sa = malloc(sizeof *sa - sizeof sa->packet + length);
+	if (!sa)
+		exit(EXIT_FAILURE);
+	sa->ack = data[length / 4 - 1];
+	sa->length = length;
+	memcpy(&sa->packet, data, length);
+
+	return sa;
+}
+
+static void
+subaction_destroy(struct subaction *sa)
+{
+	free(sa);
+}
+
+static struct list pending_transaction_list = {
+	&pending_transaction_list, &pending_transaction_list
+};
+
+static struct link_transaction *
+link_transaction_lookup(int request_node, int response_node, int tlabel)
+{
+	struct link_transaction *t;
+
+	list_for_each_entry(t, &pending_transaction_list, link) {
+		if (t->request_node == request_node &&
+		    t->response_node == response_node &&
+		    t->tlabel == tlabel)
+			return t;
+	}
+
+	t = malloc(sizeof *t);
+	if (!t)
+		exit(EXIT_FAILURE);
+	t->request_node = request_node;
+	t->response_node = response_node;
+	t->tlabel = tlabel;
+	list_init(&t->request_list);
+	list_init(&t->response_list);
+
+	list_append(&pending_transaction_list, &t->link);
+
+	return t;
+}
+
+static void
+link_transaction_destroy(struct link_transaction *t)
+{
+	struct subaction *sa;
+
+	while (!list_empty(&t->request_list)) {
+		sa = list_head(&t->request_list, struct subaction, link);
+		list_remove(&sa->link);
+		subaction_destroy(sa);
+	}
+	while (!list_empty(&t->response_list)) {
+		sa = list_head(&t->response_list, struct subaction, link);
+		list_remove(&sa->link);
+		subaction_destroy(sa);
+	}
+	free(t);
+}
+
+struct protocol_decoder {
+	const char *name;
+	int (*decode)(struct link_transaction *t);
+};
+
+static const struct protocol_decoder protocol_decoders[] = {
+	{ "FCP", decode_fcp }
+};
+
+static void
+handle_transaction(struct link_transaction *t)
+{
+	struct subaction *sa;
+	int i;
+
+	if (!t->request) {
+		printf("BUG in handle_transaction\n");
+		return;
+	}
+
+	for (i = 0; i < array_length(protocol_decoders); i++)
+		if (protocol_decoders[i].decode(t))
+			break;
+
+	/* HACK: decode only fcp right now. */
+	return;
+
+	decode_link_packet(&t->request->packet, t->request->length,
+			   PACKET_FIELD_TRANSACTION, 0);
+	if (t->response)
+		decode_link_packet(&t->response->packet, t->request->length,
+				   PACKET_FIELD_TRANSACTION, 0);
+	else
+		printf("[no response]");
+
+	if (option_verbose) {
+		list_for_each_entry(sa, &t->request_list, link)
+			print_packet((uint32_t *) &sa->packet, sa->length);
+		list_for_each_entry(sa, &t->response_list, link)
+			print_packet((uint32_t *) &sa->packet, sa->length);
+	}
+	printf("\r\n");
+
+	link_transaction_destroy(t);
+}
+
+static void
+clear_pending_transaction_list(void)
+{
+	struct link_transaction *t;
+
+	while (!list_empty(&pending_transaction_list)) {
+		t = list_head(&pending_transaction_list,
+			      struct link_transaction, link);
+		list_remove(&t->link);
+		link_transaction_destroy(t);
+		/* print unfinished transactions */
+	}
+}
+
+static const char * const tcode_names[] = {
+	[0x0] = "write_quadlet_request",	[0x6] = "read_quadlet_response",
+	[0x1] = "write_block_request",		[0x7] = "read_block_response",
+	[0x2] = "write_response",		[0x8] = "cycle_start",
+	[0x3] = "reserved",			[0x9] = "lock_request",
+	[0x4] = "read_quadlet_request",		[0xa] = "iso_data",
+	[0x5] = "read_block_request",		[0xb] = "lock_response",
+};
+
+static const char * const ack_names[] = {
+	[0x0] = "no ack",			[0x8] = "reserved (0x08)",
+	[0x1] = "ack_complete",			[0x9] = "reserved (0x09)",
+	[0x2] = "ack_pending",			[0xa] = "reserved (0x0a)",
+	[0x3] = "reserved (0x03)",		[0xb] = "reserved (0x0b)",
+	[0x4] = "ack_busy_x",			[0xc] = "reserved (0x0c)",
+	[0x5] = "ack_busy_a",			[0xd] = "ack_data_error",
+	[0x6] = "ack_busy_b",			[0xe] = "ack_type_error",
+	[0x7] = "reserved (0x07)",		[0xf] = "reserved (0x0f)",
+};
+
+static const char * const rcode_names[] = {
+	[0x0] = "complete",			[0x4] = "conflict_error",
+	[0x1] = "reserved (0x01)",		[0x5] = "data_error",
+	[0x2] = "reserved (0x02)",		[0x6] = "type_error",
+	[0x3] = "reserved (0x03)",		[0x7] = "address_error",
+};
+
+static const char * const retry_names[] = {
+	[0x0] = "retry_1",
+	[0x1] = "retry_x",
+	[0x2] = "retry_a",
+	[0x3] = "retry_b",
+};
+
+enum {
+	PACKET_RESERVED,
+	PACKET_REQUEST,
+	PACKET_RESPONSE,
+	PACKET_OTHER,
+};
+
+struct packet_info {
+	const char *name;
+	int type;
+	int response_tcode;
+	const struct packet_field *fields;
+	int field_count;
+};
+
+struct packet_field {
+	const char *name; /* Short name for field. */
+	int offset;	/* Location of field, specified in bits; */
+			/* negative means from end of packet.    */
+	int width;	/* Width of field, 0 means use data_length. */
+	int flags;	/* Show options. */
+	const char * const *value_names;
+};
+
+#define COMMON_REQUEST_FIELDS						\
+	{ "dest", 0, 16, PACKET_FIELD_TRANSACTION },			\
+	{ "tl", 16, 6 },						\
+	{ "rt", 22, 2, PACKET_FIELD_DETAIL, retry_names },		\
+	{ "tcode", 24, 4, PACKET_FIELD_TRANSACTION, tcode_names },	\
+	{ "pri", 28, 4, PACKET_FIELD_DETAIL },				\
+	{ "src", 32, 16, PACKET_FIELD_TRANSACTION },			\
+	{ "offs", 48, 48, PACKET_FIELD_TRANSACTION }
+
+#define COMMON_RESPONSE_FIELDS						\
+	{ "dest", 0, 16 },						\
+	{ "tl", 16, 6 },						\
+	{ "rt", 22, 2, PACKET_FIELD_DETAIL, retry_names },		\
+	{ "tcode", 24, 4, 0, tcode_names },				\
+	{ "pri", 28, 4, PACKET_FIELD_DETAIL },				\
+	{ "src", 32, 16 },						\
+	{ "rcode", 48, 4, PACKET_FIELD_TRANSACTION, rcode_names }
+
+static const struct packet_field read_quadlet_request_fields[] = {
+	COMMON_REQUEST_FIELDS,
+	{ "crc", 96, 32, PACKET_FIELD_DETAIL },
+	{ "ack", 156, 4, 0, ack_names },
+};
+
+static const struct packet_field read_quadlet_response_fields[] = {
+	COMMON_RESPONSE_FIELDS,
+	{ "data", 96, 32, PACKET_FIELD_TRANSACTION },
+	{ "crc", 128, 32, PACKET_FIELD_DETAIL },
+	{ "ack", 188, 4, 0, ack_names },
+};
+
+static const struct packet_field read_block_request_fields[] = {
+	COMMON_REQUEST_FIELDS,
+	{ "data_length", 96, 16, PACKET_FIELD_TRANSACTION },
+	{ "extended_tcode", 112, 16 },
+	{ "crc", 128, 32, PACKET_FIELD_DETAIL },
+	{ "ack", 188, 4, 0, ack_names },
+};
+
+static const struct packet_field block_response_fields[] = {
+	COMMON_RESPONSE_FIELDS,
+	{ "data_length", 96, 16, PACKET_FIELD_DATA_LENGTH },
+	{ "extended_tcode", 112, 16 },
+	{ "crc", 128, 32, PACKET_FIELD_DETAIL },
+	{ "data", 160, 0, PACKET_FIELD_TRANSACTION },
+	{ "crc", -64, 32, PACKET_FIELD_DETAIL },
+	{ "ack", -4, 4, 0, ack_names },
+};
+
+static const struct packet_field write_quadlet_request_fields[] = {
+	COMMON_REQUEST_FIELDS,
+	{ "data", 96, 32, PACKET_FIELD_TRANSACTION },
+	{ "ack", -4, 4, 0, ack_names },
+};
+
+static const struct packet_field block_request_fields[] = {
+	COMMON_REQUEST_FIELDS,
+	{ "data_length", 96, 16, PACKET_FIELD_DATA_LENGTH | PACKET_FIELD_TRANSACTION },
+	{ "extended_tcode", 112, 16, PACKET_FIELD_TRANSACTION },
+	{ "crc", 128, 32, PACKET_FIELD_DETAIL },
+	{ "data", 160, 0, PACKET_FIELD_TRANSACTION },
+	{ "crc", -64, 32, PACKET_FIELD_DETAIL },
+	{ "ack", -4, 4, 0, ack_names },
+};
+
+static const struct packet_field write_response_fields[] = {
+	COMMON_RESPONSE_FIELDS,
+	{ "reserved", 64, 32, PACKET_FIELD_DETAIL },
+	{ "ack", -4, 4, 0, ack_names },
+};
+
+static const struct packet_field iso_data_fields[] = {
+	{ "data_length", 0, 16, PACKET_FIELD_DATA_LENGTH },
+	{ "tag", 16, 2 },
+	{ "channel", 18, 6 },
+	{ "tcode", 24, 4, 0, tcode_names },
+	{ "sy", 28, 4 },
+	{ "crc", 32, 32, PACKET_FIELD_DETAIL },
+	{ "data", 64, 0 },
+	{ "crc", -64, 32, PACKET_FIELD_DETAIL },
+	{ "ack", -4, 4, 0, ack_names },
+};
+
+static const struct packet_info packet_info[] = {
+	{
+		.name		= "write_quadlet_request",
+		.type		= PACKET_REQUEST,
+		.response_tcode	= TCODE_WRITE_RESPONSE,
+		.fields		= write_quadlet_request_fields,
+		.field_count	= array_length(write_quadlet_request_fields)
+	},
+	{
+		.name		= "write_block_request",
+		.type		= PACKET_REQUEST,
+		.response_tcode	= TCODE_WRITE_RESPONSE,
+		.fields		= block_request_fields,
+		.field_count	= array_length(block_request_fields)
+	},
+	{
+		.name		= "write_response",
+		.type		= PACKET_RESPONSE,
+		.fields		= write_response_fields,
+		.field_count	= array_length(write_response_fields)
+	},
+	{
+		.name		= "reserved",
+		.type		= PACKET_RESERVED,
+	},
+	{
+		.name		= "read_quadlet_request",
+		.type		= PACKET_REQUEST,
+		.response_tcode	= TCODE_READ_QUADLET_RESPONSE,
+		.fields		= read_quadlet_request_fields,
+		.field_count	= array_length(read_quadlet_request_fields)
+	},
+	{
+		.name		= "read_block_request",
+		.type		= PACKET_REQUEST,
+		.response_tcode	= TCODE_READ_BLOCK_RESPONSE,
+		.fields		= read_block_request_fields,
+		.field_count	= array_length(read_block_request_fields)
+	},
+	{
+		.name		= "read_quadlet_response",
+		.type		= PACKET_RESPONSE,
+		.fields		= read_quadlet_response_fields,
+		.field_count	= array_length(read_quadlet_response_fields)
+	},
+	{
+		.name		= "read_block_response",
+		.type		= PACKET_RESPONSE,
+		.fields		= block_response_fields,
+		.field_count	= array_length(block_response_fields)
+	},
+	{
+		.name		= "cycle_start",
+		.type		= PACKET_OTHER,
+		.fields		= write_quadlet_request_fields,
+		.field_count	= array_length(write_quadlet_request_fields)
+	},
+	{
+		.name		= "lock_request",
+		.type		= PACKET_REQUEST,
+		.fields		= block_request_fields,
+		.field_count	= array_length(block_request_fields)
+	},
+	{
+		.name		= "iso_data",
+		.type		= PACKET_OTHER,
+		.fields		= iso_data_fields,
+		.field_count	= array_length(iso_data_fields)
+	},
+	{
+		.name		= "lock_response",
+		.type		= PACKET_RESPONSE,
+		.fields		= block_response_fields,
+		.field_count	= array_length(block_response_fields)
+	},
+};
+
+static int
+handle_request_packet(uint32_t *data, size_t length)
+{
+	struct link_packet *p = (struct link_packet *) data;
+	struct subaction *sa, *prev;
+	struct link_transaction *t;
+
+	t = link_transaction_lookup(p->common.source, p->common.destination,
+			p->common.tlabel);
+	sa = subaction_create(data, length);
+	t->request = sa;
+
+	if (!list_empty(&t->request_list)) {
+		prev = list_tail(&t->request_list,
+				 struct subaction, link);
+
+		if (!ACK_BUSY(prev->ack)) {
+			/*
+			 * error, we should only see ack_busy_* before the
+			 * ack_pending/ack_complete -- this is an ack_pending
+			 * instead (ack_complete would have finished the
+			 * transaction).
+			 */
+		}
+
+		if (prev->packet.common.tcode != sa->packet.common.tcode ||
+		    prev->packet.common.tlabel != sa->packet.common.tlabel) {
+			/* memcmp() ? */
+			/* error, these should match for retries. */
+		}
+	}
+
+	list_append(&t->request_list, &sa->link);
+
+	switch (sa->ack) {
+	case ACK_COMPLETE:
+		if (p->common.tcode != TCODE_WRITE_QUADLET_REQUEST &&
+		    p->common.tcode != TCODE_WRITE_BLOCK_REQUEST)
+			/* error, unified transactions only allowed for write */;
+		list_remove(&t->link);
+		handle_transaction(t);
+		break;
+
+	case ACK_NO_ACK:
+	case ACK_DATA_ERROR:
+	case ACK_TYPE_ERROR:
+		list_remove(&t->link);
+		handle_transaction(t);
+		break;
+
+	case ACK_PENDING:
+		/* request subaction phase over, wait for response. */
+		break;
+
+	case ACK_BUSY_X:
+	case ACK_BUSY_A:
+	case ACK_BUSY_B:
+		/* ok, wait for retry. */
+		/* check that retry protocol is respected. */
+		break;
+	}
+
+	return 1;
+}
+
+static int
+handle_response_packet(uint32_t *data, size_t length)
+{
+	struct link_packet *p = (struct link_packet *) data;
+	struct subaction *sa, *prev;
+	struct link_transaction *t;
+
+	t = link_transaction_lookup(p->common.destination, p->common.source,
+			p->common.tlabel);
+	if (list_empty(&t->request_list)) {
+		/* unsolicited response */
+	}
+
+	sa = subaction_create(data, length);
+	t->response = sa;
+
+	if (!list_empty(&t->response_list)) {
+		prev = list_tail(&t->response_list, struct subaction, link);
+
+		if (!ACK_BUSY(prev->ack)) {
+			/*
+			 * error, we should only see ack_busy_* before the
+			 * ack_pending/ack_complete
+			 */
+		}
+
+		if (prev->packet.common.tcode != sa->packet.common.tcode ||
+		    prev->packet.common.tlabel != sa->packet.common.tlabel) {
+			/* use memcmp() instead? */
+			/* error, these should match for retries. */
+		}
+	} else {
+		prev = list_tail(&t->request_list, struct subaction, link);
+		if (prev->ack != ACK_PENDING) {
+			/*
+			 * error, should not get response unless last request got
+			 * ack_pending.
+			 */
+		}
+
+		if (packet_info[prev->packet.common.tcode].response_tcode !=
+		    sa->packet.common.tcode) {
+			/* error, tcode mismatch */
+		}
+	}
+
+	list_append(&t->response_list, &sa->link);
+
+	switch (sa->ack) {
+	case ACK_COMPLETE:
+	case ACK_NO_ACK:
+	case ACK_DATA_ERROR:
+	case ACK_TYPE_ERROR:
+		list_remove(&t->link);
+		handle_transaction(t);
+		/* transaction complete, remove t from pending list. */
+		break;
+
+	case ACK_PENDING:
+		/* error for responses. */
+		break;
+
+	case ACK_BUSY_X:
+	case ACK_BUSY_A:
+	case ACK_BUSY_B:
+		/* no problem, wait for next retry */
+		break;
+	}
+
+	return 1;
+}
+
+static int
+handle_packet(uint32_t *data, size_t length)
+{
+	if (length == 0) {
+		printf("bus reset\r\n");
+		clear_pending_transaction_list();
+	} else if (length > sizeof(struct phy_packet)) {
+		struct link_packet *p = (struct link_packet *) data;
+
+		switch (packet_info[p->common.tcode].type) {
+		case PACKET_REQUEST:
+			return handle_request_packet(data, length);
+
+		case PACKET_RESPONSE:
+			return handle_response_packet(data, length);
+
+		case PACKET_OTHER:
+		case PACKET_RESERVED:
+			return 0;
+		}
+	}
+
+	return 1;
+}
+
+static unsigned int
+get_bits(struct link_packet *packet, int offset, int width)
+{
+	uint32_t *data = (uint32_t *) packet;
+	uint32_t index, shift, mask;
+
+	index = offset / 32 + 1;
+	shift = 32 - (offset & 31) - width;
+	mask = width == 32 ? ~0 : (1 << width) - 1;
+
+	return (data[index] >> shift) & mask;
+}
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define byte_index(i) ((i) ^ 3)
+#elif __BYTE_ORDER == __BIG_ENDIAN
+#define byte_index(i) (i)
+#else
+#error unsupported byte order.
+#endif
+
+static void
+dump_data(unsigned char *data, int length)
+{
+	int i, print_length;
+
+	if (length > 128)
+		print_length = 128;
+	else
+		print_length = length;
+
+	for (i = 0; i < print_length; i++)
+		printf("%s%02hhx",
+		       (i % 4 == 0 && i != 0) ? " " : "",
+		       data[byte_index(i)]);
+
+	if (print_length < length)
+		printf(" (%d more bytes)", length - print_length);
+}
+
+static void
+decode_link_packet(struct link_packet *packet, size_t length,
+		   int include_flags, int exclude_flags)
+{
+	const struct packet_info *pi;
+	int data_length = 0;
+	int i;
+
+	pi = &packet_info[packet->common.tcode];
+
+	for (i = 0; i < pi->field_count; i++) {
+		const struct packet_field *f = &pi->fields[i];
+		int offset;
+
+		if (f->flags & exclude_flags)
+			continue;
+		if (include_flags && !(f->flags & include_flags))
+			continue;
+
+		if (f->offset < 0)
+			offset = length * 8 + f->offset - 32;
+		else
+			offset = f->offset;
+
+		if (f->value_names != NULL) {
+			uint32_t bits;
+
+			bits = get_bits(packet, offset, f->width);
+			printf("%s", f->value_names[bits]);
+		} else if (f->width == 0) {
+			printf("%s=[", f->name);
+			dump_data((unsigned char *) packet + (offset / 8 + 4), data_length);
+			printf("]");
+		} else {
+			unsigned long long bits;
+			int high_width, low_width;
+
+			if ((offset & ~31) != ((offset + f->width - 1) & ~31)) {
+				/* Bit field spans quadlet boundary. */
+				high_width = ((offset + 31) & ~31) - offset;
+				low_width = f->width - high_width;
+
+				bits = get_bits(packet, offset, high_width);
+				bits = (bits << low_width) |
+					get_bits(packet, offset + high_width, low_width);
+			} else {
+				bits = get_bits(packet, offset, f->width);
+			}
+
+			printf("%s=0x%0*llx", f->name, (f->width + 3) / 4, bits);
+
+			if (f->flags & PACKET_FIELD_DATA_LENGTH)
+				data_length = bits;
+		}
+
+		if (i < pi->field_count - 1)
+			printf(", ");
+	}
+}
+
+static void
+print_packet(uint32_t *data, size_t length)
+{
+	int i;
+
+	printf("%6u  ", data[0]);
+
+	if (length == 4) {
+		printf("bus reset");
+	} else if (length < sizeof(struct phy_packet)) {
+		printf("short packet: ");
+		for (i = 1; i < length / 4; i++)
+			printf("%s%08x", i == 0 ? "[" : " ", data[i]);
+		printf("]");
+
+	} else if (length == sizeof(struct phy_packet) && data[1] == ~data[2]) {
+		struct phy_packet *pp = (struct phy_packet *) data;
+
+		/* phy packet are 3 quadlets: the 1 quadlet payload,
+		 * the bitwise inverse of the payload and the snoop
+		 * mode ack */
+
+		switch (pp->common.identifier) {
+		case PHY_PACKET_CONFIGURATION:
+			if (!pp->phy_config.set_root && !pp->phy_config.set_gap_count) {
+				printf("ext phy config: phy_id=%02x", pp->phy_config.root_id);
+			} else {
+				printf("phy config:");
+				if (pp->phy_config.set_root)
+					printf(" set_root_id=%02x", pp->phy_config.root_id);
+				if (pp->phy_config.set_gap_count)
+					printf(" set_gap_count=%d", pp->phy_config.gap_count);
+			}
+			break;
+
+		case PHY_PACKET_LINK_ON:
+			printf("link-on packet, phy_id=%02x", pp->link_on.phy_id);
+			break;
+
+		case PHY_PACKET_SELF_ID:
+			if (pp->self_id.extended) {
+				printf("extended self id: phy_id=%02x, seq=%d",
+				       pp->ext_self_id.phy_id, pp->ext_self_id.sequence);
+			} else {
+				static const char * const speed_names[] = {
+					"S100", "S200", "S400", "BETA"
+				};
+				printf("self id: phy_id=%02x, link %s, gap_count=%d, speed=%s%s%s",
+				       pp->self_id.phy_id,
+				       (pp->self_id.link_active ? "active" : "not active"),
+				       pp->self_id.gap_count,
+				       speed_names[pp->self_id.phy_speed],
+				       (pp->self_id.contender ? ", irm contender" : ""),
+				       (pp->self_id.initiated_reset ? ", initiator" : ""));
+			}
+			break;
+		default:
+			printf("unknown phy packet: ");
+			for (i = 1; i < length / 4; i++)
+				printf("%s%08x", i == 0 ? "[" : " ", data[i]);
+			printf("]");
+			break;
+		}
+	} else {
+		struct link_packet *packet = (struct link_packet *) data;
+
+		decode_link_packet(packet, length, 0,
+				   option_verbose ? 0 : PACKET_FIELD_DETAIL);
+	}
+
+	if (option_hex) {
+		printf("  [");
+		dump_data((unsigned char *) data + 4, length - 4);
+		printf("]");
+	}
+
+	printf("\r\n");
+}
+
+#define HIDE_CURSOR	"\033[?25l"
+#define SHOW_CURSOR	"\033[?25h"
+#define CLEAR		"\033[H\033[2J"
+
+static void
+print_stats(uint32_t *data, size_t length)
+{
+	static int bus_reset_count, short_packet_count, phy_packet_count;
+	static int tcode_count[16];
+	static struct timeval last_update;
+	struct timeval now;
+	int i;
+
+	if (length == 0)
+		bus_reset_count++;
+	else if (length < sizeof(struct phy_packet))
+		short_packet_count++;
+	else if (length == sizeof(struct phy_packet) && data[1] == ~data[2])
+		phy_packet_count++;
+	else {
+		struct link_packet *packet = (struct link_packet *) data;
+		tcode_count[packet->common.tcode]++;
+	}
+
+	gettimeofday(&now, NULL);
+	if (now.tv_sec <= last_update.tv_sec &&
+	    now.tv_usec < last_update.tv_usec + 500000)
+		return;
+
+	last_update = now;
+	printf(CLEAR HIDE_CURSOR
+	       "  bus resets              : %8d\n"
+	       "  short packets           : %8d\n"
+	       "  phy packets             : %8d\n",
+	       bus_reset_count, short_packet_count, phy_packet_count);
+
+	for (i = 0; i < array_length(packet_info); i++)
+		if (packet_info[i].type != PACKET_RESERVED)
+			printf("  %-24s: %8d\n", packet_info[i].name, tcode_count[i]);
+	printf(SHOW_CURSOR "\n");
+}
+
+static struct termios saved_attributes;
+
+static void
+reset_input_mode(void)
+{
+	tcsetattr(STDIN_FILENO, TCSANOW, &saved_attributes);
+}
+
+static void
+set_input_mode(void)
+{
+	struct termios tattr;
+
+	/* Make sure stdin is a terminal. */
+	if (!isatty(STDIN_FILENO)) {
+		fprintf(stderr, "Not a terminal.\n");
+		exit(EXIT_FAILURE);
+	}
+
+	/* Save the terminal attributes so we can restore them later. */
+	tcgetattr(STDIN_FILENO, &saved_attributes);
+	atexit(reset_input_mode);
+
+	/* Set the funny terminal modes. */
+	tcgetattr(STDIN_FILENO, &tattr);
+	tattr.c_lflag &= ~(ICANON|ECHO); /* Clear ICANON and ECHO. */
+	tattr.c_cc[VMIN] = 1;
+	tattr.c_cc[VTIME] = 0;
+	tcsetattr(STDIN_FILENO, TCSAFLUSH, &tattr);
+}
+
+int main(int argc, const char *argv[])
+{
+	uint32_t buf[128 * 1024];
+	uint32_t filter;
+	int length, retval, view;
+	int fd = -1;
+	FILE *output = NULL, *input = NULL;
+	poptContext con;
+	char c;
+	struct pollfd pollfds[2];
+
+	sys_sigint_handler = signal(SIGINT, sigint_handler);
+
+	con = poptGetContext(NULL, argc, argv, options, 0);
+	retval = poptGetNextOpt(con);
+	if (retval < -1) {
+		poptPrintUsage(con, stdout, 0);
+		return -1;
+	}
+
+	if (option_version) {
+		printf("dump tool for nosy sniffer, version %s\n", VERSION);
+		return 0;
+	}
+
+	if (__BYTE_ORDER != __LITTLE_ENDIAN)
+		fprintf(stderr, "warning: nosy has only been tested on little "
+			"endian machines\n");
+
+	if (option_input != NULL) {
+		input = fopen(option_input, "r");
+		if (input == NULL) {
+			fprintf(stderr, "Could not open %s, %m\n", option_input);
+			return -1;
+		}
+	} else {
+		fd = open(option_nosy_device, O_RDWR);
+		if (fd < 0) {
+			fprintf(stderr, "Could not open %s, %m\n", option_nosy_device);
+			return -1;
+		}
+		set_input_mode();
+	}
+
+	if (strcmp(option_view, "transaction") == 0)
+		view = VIEW_TRANSACTION;
+	else if (strcmp(option_view, "stats") == 0)
+		view = VIEW_STATS;
+	else
+		view = VIEW_PACKET;
+
+	if (option_output) {
+		output = fopen(option_output, "w");
+		if (output == NULL) {
+			fprintf(stderr, "Could not open %s, %m\n", option_output);
+			return -1;
+		}
+	}
+
+	setvbuf(stdout, NULL, _IOLBF, BUFSIZ);
+
+	filter = ~0;
+	if (!option_iso)
+		filter &= ~(1 << TCODE_STREAM_DATA);
+	if (!option_cycle_start)
+		filter &= ~(1 << TCODE_CYCLE_START);
+	if (view == VIEW_STATS)
+		filter = ~(1 << TCODE_CYCLE_START);
+
+	ioctl(fd, NOSY_IOC_FILTER, filter);
+
+	ioctl(fd, NOSY_IOC_START);
+
+	pollfds[0].fd = fd;
+	pollfds[0].events = POLLIN;
+	pollfds[1].fd = STDIN_FILENO;
+	pollfds[1].events = POLLIN;
+
+	while (run) {
+		if (input != NULL) {
+			if (fread(&length, sizeof length, 1, input) != 1)
+				return 0;
+			fread(buf, 1, length, input);
+		} else {
+			poll(pollfds, 2, -1);
+			if (pollfds[1].revents) {
+				read(STDIN_FILENO, &c, sizeof c);
+				switch (c) {
+				case 'q':
+					if (output != NULL)
+						fclose(output);
+					return 0;
+				}
+			}
+
+			if (pollfds[0].revents)
+				length = read(fd, buf, sizeof buf);
+			else
+				continue;
+		}
+
+		if (output != NULL) {
+			fwrite(&length, sizeof length, 1, output);
+			fwrite(buf, 1, length, output);
+		}
+
+		switch (view) {
+		case VIEW_TRANSACTION:
+			handle_packet(buf, length);
+			break;
+		case VIEW_PACKET:
+			print_packet(buf, length);
+			break;
+		case VIEW_STATS:
+			print_stats(buf, length);
+			break;
+		}
+	}
+
+	if (output != NULL)
+		fclose(output);
+
+	close(fd);
+
+	poptFreeContext(con);
+
+	return 0;
+}