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, 439 insertions, 0 deletions

diff --git a/Documentation/admin-guide/blockdev/paride.rst b/Documentation/admin-guide/blockdev/paride.rst
new file mode 100644
index 000000000..e1ce90af6
--- /dev/null
+++ b/Documentation/admin-guide/blockdev/paride.rst
@@ -0,0 +1,439 @@
+===================================
+Linux and parallel port IDE devices
+===================================
+
+PARIDE v1.03   (c) 1997-8  Grant Guenther <grant@torque.net>
+
+1. Introduction
+===============
+
+Owing to the simplicity and near universality of the parallel port interface
+to personal computers, many external devices such as portable hard-disk,
+CD-ROM, LS-120 and tape drives use the parallel port to connect to their
+host computer.  While some devices (notably scanners) use ad-hoc methods
+to pass commands and data through the parallel port interface, most
+external devices are actually identical to an internal model, but with
+a parallel-port adapter chip added in.  Some of the original parallel port
+adapters were little more than mechanisms for multiplexing a SCSI bus.
+(The Iomega PPA-3 adapter used in the ZIP drives is an example of this
+approach).  Most current designs, however, take a different approach.
+The adapter chip reproduces a small ISA or IDE bus in the external device
+and the communication protocol provides operations for reading and writing
+device registers, as well as data block transfer functions.  Sometimes,
+the device being addressed via the parallel cable is a standard SCSI
+controller like an NCR 5380.  The "ditto" family of external tape
+drives use the ISA replicator to interface a floppy disk controller,
+which is then connected to a floppy-tape mechanism.  The vast majority
+of external parallel port devices, however, are now based on standard
+IDE type devices, which require no intermediate controller.  If one
+were to open up a parallel port CD-ROM drive, for instance, one would
+find a standard ATAPI CD-ROM drive, a power supply, and a single adapter
+that interconnected a standard PC parallel port cable and a standard
+IDE cable.  It is usually possible to exchange the CD-ROM device with
+any other device using the IDE interface.
+
+The document describes the support in Linux for parallel port IDE
+devices.  It does not cover parallel port SCSI devices, "ditto" tape
+drives or scanners.  Many different devices are supported by the
+parallel port IDE subsystem, including:
+
+	- MicroSolutions backpack CD-ROM
+	- MicroSolutions backpack PD/CD
+	- MicroSolutions backpack hard-drives
+	- MicroSolutions backpack 8000t tape drive
+	- SyQuest EZ-135, EZ-230 & SparQ drives
+	- Avatar Shark
+	- Imation Superdisk LS-120
+	- Maxell Superdisk LS-120
+	- FreeCom Power CD
+	- Hewlett-Packard 5GB and 8GB tape drives
+	- Hewlett-Packard 7100 and 7200 CD-RW drives
+
+as well as most of the clone and no-name products on the market.
+
+To support such a wide range of devices, PARIDE, the parallel port IDE
+subsystem, is actually structured in three parts.   There is a base
+paride module which provides a registry and some common methods for
+accessing the parallel ports.  The second component is a set of
+high-level drivers for each of the different types of supported devices:
+
+	===	=============
+	pd	IDE disk
+	pcd	ATAPI CD-ROM
+	pf	ATAPI disk
+	pt	ATAPI tape
+	pg	ATAPI generic
+	===	=============
+
+(Currently, the pg driver is only used with CD-R drives).
+
+The high-level drivers function according to the relevant standards.
+The third component of PARIDE is a set of low-level protocol drivers
+for each of the parallel port IDE adapter chips.  Thanks to the interest
+and encouragement of Linux users from many parts of the world,
+support is available for almost all known adapter protocols:
+
+	====    ====================================== ====
+        aten    ATEN EH-100                            (HK)
+        bpck    Microsolutions backpack                (US)
+        comm    DataStor (old-type) "commuter" adapter (TW)
+        dstr    DataStor EP-2000                       (TW)
+        epat    Shuttle EPAT                           (UK)
+        epia    Shuttle EPIA                           (UK)
+	fit2    FIT TD-2000			       (US)
+	fit3    FIT TD-3000			       (US)
+	friq    Freecom IQ cable                       (DE)
+        frpw    Freecom Power                          (DE)
+        kbic    KingByte KBIC-951A and KBIC-971A       (TW)
+	ktti    KT Technology PHd adapter              (SG)
+        on20    OnSpec 90c20                           (US)
+        on26    OnSpec 90c26                           (US)
+	====    ====================================== ====
+
+
+2. Using the PARIDE subsystem
+=============================
+
+While configuring the Linux kernel, you may choose either to build
+the PARIDE drivers into your kernel, or to build them as modules.
+
+In either case, you will need to select "Parallel port IDE device support"
+as well as at least one of the high-level drivers and at least one
+of the parallel port communication protocols.  If you do not know
+what kind of parallel port adapter is used in your drive, you could
+begin by checking the file names and any text files on your DOS
+installation floppy.  Alternatively, you can look at the markings on
+the adapter chip itself.  That's usually sufficient to identify the
+correct device.
+
+You can actually select all the protocol modules, and allow the PARIDE
+subsystem to try them all for you.
+
+For the "brand-name" products listed above, here are the protocol
+and high-level drivers that you would use:
+
+	================	============	======	========
+	Manufacturer		Model		Driver	Protocol
+	================	============	======	========
+	MicroSolutions		CD-ROM		pcd	bpck
+	MicroSolutions		PD drive	pf	bpck
+	MicroSolutions		hard-drive	pd	bpck
+	MicroSolutions          8000t tape      pt      bpck
+	SyQuest			EZ, SparQ	pd	epat
+	Imation			Superdisk	pf	epat
+	Maxell                  Superdisk       pf      friq
+	Avatar			Shark		pd	epat
+	FreeCom			CD-ROM		pcd	frpw
+	Hewlett-Packard		5GB Tape	pt	epat
+	Hewlett-Packard		7200e (CD)	pcd	epat
+	Hewlett-Packard		7200e (CD-R)	pg	epat
+	================	============	======	========
+
+2.1  Configuring built-in drivers
+---------------------------------
+
+We recommend that you get to know how the drivers work and how to
+configure them as loadable modules, before attempting to compile a
+kernel with the drivers built-in.
+
+If you built all of your PARIDE support directly into your kernel,
+and you have just a single parallel port IDE device, your kernel should
+locate it automatically for you.  If you have more than one device,
+you may need to give some command line options to your bootloader
+(eg: LILO), how to do that is beyond the scope of this document.
+
+The high-level drivers accept a number of command line parameters, all
+of which are documented in the source files in linux/drivers/block/paride.
+By default, each driver will automatically try all parallel ports it
+can find, and all protocol types that have been installed, until it finds
+a parallel port IDE adapter.  Once it finds one, the probe stops.  So,
+if you have more than one device, you will need to tell the drivers
+how to identify them.  This requires specifying the port address, the
+protocol identification number and, for some devices, the drive's
+chain ID.  While your system is booting, a number of messages are
+displayed on the console.  Like all such messages, they can be
+reviewed with the 'dmesg' command.  Among those messages will be
+some lines like::
+
+	paride: bpck registered as protocol 0
+	paride: epat registered as protocol 1
+
+The numbers will always be the same until you build a new kernel with
+different protocol selections.  You should note these numbers as you
+will need them to identify the devices.
+
+If you happen to be using a MicroSolutions backpack device, you will
+also need to know the unit ID number for each drive.  This is usually
+the last two digits of the drive's serial number (but read MicroSolutions'
+documentation about this).
+
+As an example, let's assume that you have a MicroSolutions PD/CD drive
+with unit ID number 36 connected to the parallel port at 0x378, a SyQuest
+EZ-135 connected to the chained port on the PD/CD drive and also an
+Imation Superdisk connected to port 0x278.  You could give the following
+options on your boot command::
+
+	pd.drive0=0x378,1 pf.drive0=0x278,1 pf.drive1=0x378,0,36
+
+In the last option, pf.drive1 configures device /dev/pf1, the 0x378
+is the parallel port base address, the 0 is the protocol registration
+number and 36 is the chain ID.
+
+Please note:  while PARIDE will work both with and without the
+PARPORT parallel port sharing system that is included by the
+"Parallel port support" option, PARPORT must be included and enabled
+if you want to use chains of devices on the same parallel port.
+
+2.2  Loading and configuring PARIDE as modules
+----------------------------------------------
+
+It is much faster and simpler to get to understand the PARIDE drivers
+if you use them as loadable kernel modules.
+
+Note 1:
+	using these drivers with the "kerneld" automatic module loading
+	system is not recommended for beginners, and is not documented here.
+
+Note 2:
+	if you build PARPORT support as a loadable module, PARIDE must
+	also be built as loadable modules, and PARPORT must be loaded before
+	the PARIDE modules.
+
+To use PARIDE, you must begin by::
+
+	insmod paride
+
+this loads a base module which provides a registry for the protocols,
+among other tasks.
+
+Then, load as many of the protocol modules as you think you might need.
+As you load each module, it will register the protocols that it supports,
+and print a log message to your kernel log file and your console. For
+example::
+
+	# insmod epat
+	paride: epat registered as protocol 0
+	# insmod kbic
+	paride: k951 registered as protocol 1
+        paride: k971 registered as protocol 2
+
+Finally, you can load high-level drivers for each kind of device that
+you have connected.  By default, each driver will autoprobe for a single
+device, but you can support up to four similar devices by giving their
+individual coordinates when you load the driver.
+
+For example, if you had two no-name CD-ROM drives both using the
+KingByte KBIC-951A adapter, one on port 0x378 and the other on 0x3bc
+you could give the following command::
+
+	# insmod pcd drive0=0x378,1 drive1=0x3bc,1
+
+For most adapters, giving a port address and protocol number is sufficient,
+but check the source files in linux/drivers/block/paride for more
+information.  (Hopefully someone will write some man pages one day !).
+
+As another example, here's what happens when PARPORT is installed, and
+a SyQuest EZ-135 is attached to port 0x378::
+
+	# insmod paride
+	paride: version 1.0 installed
+	# insmod epat
+	paride: epat registered as protocol 0
+	# insmod pd
+	pd: pd version 1.0, major 45, cluster 64, nice 0
+	pda: Sharing parport1 at 0x378
+	pda: epat 1.0, Shuttle EPAT chip c3 at 0x378, mode 5 (EPP-32), delay 1
+	pda: SyQuest EZ135A, 262144 blocks [128M], (512/16/32), removable media
+	 pda: pda1
+
+Note that the last line is the output from the generic partition table
+scanner - in this case it reports that it has found a disk with one partition.
+
+2.3  Using a PARIDE device
+--------------------------
+
+Once the drivers have been loaded, you can access PARIDE devices in the
+same way as their traditional counterparts.  You will probably need to
+create the device "special files".  Here is a simple script that you can
+cut to a file and execute::
+
+  #!/bin/bash
+  #
+  # mkd -- a script to create the device special files for the PARIDE subsystem
+  #
+  function mkdev {
+    mknod $1 $2 $3 $4 ; chmod 0660 $1 ; chown root:disk $1
+  }
+  #
+  function pd {
+    D=$( printf \\$( printf "x%03x" $[ $1 + 97 ] ) )
+    mkdev pd$D b 45 $[ $1 * 16 ]
+    for P in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
+    do mkdev pd$D$P b 45 $[ $1 * 16 + $P ]
+    done
+  }
+  #
+  cd /dev
+  #
+  for u in 0 1 2 3 ; do pd $u ; done
+  for u in 0 1 2 3 ; do mkdev pcd$u b 46 $u ; done
+  for u in 0 1 2 3 ; do mkdev pf$u  b 47 $u ; done
+  for u in 0 1 2 3 ; do mkdev pt$u  c 96 $u ; done
+  for u in 0 1 2 3 ; do mkdev npt$u c 96 $[ $u + 128 ] ; done
+  for u in 0 1 2 3 ; do mkdev pg$u  c 97 $u ; done
+  #
+  # end of mkd
+
+With the device files and drivers in place, you can access PARIDE devices
+like any other Linux device.   For example, to mount a CD-ROM in pcd0, use::
+
+	mount /dev/pcd0 /cdrom
+
+If you have a fresh Avatar Shark cartridge, and the drive is pda, you
+might do something like::
+
+	fdisk /dev/pda		-- make a new partition table with
+				   partition 1 of type 83
+
+	mke2fs /dev/pda1	-- to build the file system
+
+	mkdir /shark		-- make a place to mount the disk
+
+	mount /dev/pda1 /shark
+
+Devices like the Imation superdisk work in the same way, except that
+they do not have a partition table.  For example to make a 120MB
+floppy that you could share with a DOS system::
+
+	mkdosfs /dev/pf0
+	mount /dev/pf0 /mnt
+
+
+2.4  The pf driver
+------------------
+
+The pf driver is intended for use with parallel port ATAPI disk
+devices.  The most common devices in this category are PD drives
+and LS-120 drives.  Traditionally, media for these devices are not
+partitioned.  Consequently, the pf driver does not support partitioned
+media.  This may be changed in a future version of the driver.
+
+2.5  Using the pt driver
+------------------------
+
+The pt driver for parallel port ATAPI tape drives is a minimal driver.
+It does not yet support many of the standard tape ioctl operations.
+For best performance, a block size of 32KB should be used.  You will
+probably want to set the parallel port delay to 0, if you can.
+
+2.6  Using the pg driver
+------------------------
+
+The pg driver can be used in conjunction with the cdrecord program
+to create CD-ROMs.  Please get cdrecord version 1.6.1 or later
+from ftp://ftp.fokus.gmd.de/pub/unix/cdrecord/ .  To record CD-R media
+your parallel port should ideally be set to EPP mode, and the "port delay"
+should be set to 0.  With those settings it is possible to record at 2x
+speed without any buffer underruns.  If you cannot get the driver to work
+in EPP mode, try to use "bidirectional" or "PS/2" mode and 1x speeds only.
+
+
+3. Troubleshooting
+==================
+
+3.1  Use EPP mode if you can
+----------------------------
+
+The most common problems that people report with the PARIDE drivers
+concern the parallel port CMOS settings.  At this time, none of the
+PARIDE protocol modules support ECP mode, or any ECP combination modes.
+If you are able to do so, please set your parallel port into EPP mode
+using your CMOS setup procedure.
+
+3.2  Check the port delay
+-------------------------
+
+Some parallel ports cannot reliably transfer data at full speed.  To
+offset the errors, the PARIDE protocol modules introduce a "port
+delay" between each access to the i/o ports.  Each protocol sets
+a default value for this delay.  In most cases, the user can override
+the default and set it to 0 - resulting in somewhat higher transfer
+rates.  In some rare cases (especially with older 486 systems) the
+default delays are not long enough.  if you experience corrupt data
+transfers, or unexpected failures, you may wish to increase the
+port delay.   The delay can be programmed using the "driveN" parameters
+to each of the high-level drivers.  Please see the notes above, or
+read the comments at the beginning of the driver source files in
+linux/drivers/block/paride.
+
+3.3  Some drives need a printer reset
+-------------------------------------
+
+There appear to be a number of "noname" external drives on the market
+that do not always power up correctly.  We have noticed this with some
+drives based on OnSpec and older Freecom adapters.  In these rare cases,
+the adapter can often be reinitialised by issuing a "printer reset" on
+the parallel port.  As the reset operation is potentially disruptive in
+multiple device environments, the PARIDE drivers will not do it
+automatically.  You can however, force a printer reset by doing::
+
+	insmod lp reset=1
+	rmmod lp
+
+If you have one of these marginal cases, you should probably build
+your paride drivers as modules, and arrange to do the printer reset
+before loading the PARIDE drivers.
+
+3.4  Use the verbose option and dmesg if you need help
+------------------------------------------------------
+
+While a lot of testing has gone into these drivers to make them work
+as smoothly as possible, problems will arise.  If you do have problems,
+please check all the obvious things first:  does the drive work in
+DOS with the manufacturer's drivers ?  If that doesn't yield any useful
+clues, then please make sure that only one drive is hooked to your system,
+and that either (a) PARPORT is enabled or (b) no other device driver
+is using your parallel port (check in /proc/ioports).  Then, load the
+appropriate drivers (you can load several protocol modules if you want)
+as in::
+
+	# insmod paride
+	# insmod epat
+	# insmod bpck
+	# insmod kbic
+	...
+	# insmod pd verbose=1
+
+(using the correct driver for the type of device you have, of course).
+The verbose=1 parameter will cause the drivers to log a trace of their
+activity as they attempt to locate your drive.
+
+Use 'dmesg' to capture a log of all the PARIDE messages (any messages
+beginning with paride:, a protocol module's name or a driver's name) and
+include that with your bug report.  You can submit a bug report in one
+of two ways.  Either send it directly to the author of the PARIDE suite,
+by e-mail to grant@torque.net, or join the linux-parport mailing list
+and post your report there.
+
+3.5  For more information or help
+---------------------------------
+
+You can join the linux-parport mailing list by sending a mail message
+to:
+
+		linux-parport-request@torque.net
+
+with the single word::
+
+		subscribe
+
+in the body of the mail message (not in the subject line).   Please be
+sure that your mail program is correctly set up when you do this,  as
+the list manager is a robot that will subscribe you using the reply
+address in your mail headers.  REMOVE any anti-spam gimmicks you may
+have in your mail headers, when sending mail to the list server.
+
+You might also find some useful information on the linux-parport
+web pages (although they are not always up to date) at
+
+	http://web.archive.org/web/%2E/http://www.torque.net/parport/