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, 451 insertions, 0 deletions

diff --git a/drivers/usb/serial/io_ionsp.h b/drivers/usb/serial/io_ionsp.h
new file mode 100644
index 000000000..db4fce815
--- /dev/null
+++ b/drivers/usb/serial/io_ionsp.h
@@ -0,0 +1,451 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/************************************************************************
+ *
+ *	IONSP.H		Definitions for I/O Networks Serial Protocol
+ *
+ *	Copyright (C) 1997-1998 Inside Out Networks, Inc.
+ *
+ *	These definitions are used by both kernel-mode driver and the
+ *	peripheral firmware and MUST be kept in sync.
+ *
+ ************************************************************************/
+
+/************************************************************************
+
+The data to and from all ports on the peripheral is multiplexed
+through a single endpoint pair (EP1 since it supports 64-byte
+MaxPacketSize). Therefore, the data, commands, and status for
+each port must be preceded by a short header identifying the
+destination port. The header also identifies the bytes that follow
+as data or as command/status info.
+
+Header format, first byte:
+
+    CLLLLPPP
+    --------
+    | |	 |------ Port Number:	0-7
+    | |--------- Length:	MSB bits of length
+    |----------- Data/Command:	0 = Data header
+				1 = Cmd / Status (Cmd if OUT, Status if IN)
+
+This gives 2 possible formats:
+
+
+    Data header:		0LLLLPPP	LLLLLLLL
+    ============
+
+    Where (LLLL,LLLLLLL) is 12-bit length of data that follows for
+    port number (PPP). The length is 0-based (0-FFF means 0-4095
+    bytes). The ~4K limit allows the host driver (which deals in
+    transfer requests instead of individual packets) to write a
+    large chunk of data in a single request. Note, however, that
+    the length must always be <= the current TxCredits for a given
+    port due to buffering limitations on the peripheral.
+
+
+    Cmd/Status header:		1ccccPPP	[ CCCCCCCC,	 Params ]...
+    ==================
+
+    Where (cccc) or (cccc,CCCCCCCC) is the cmd or status identifier.
+    Frequently-used values are encoded as (cccc), longer ones using
+    (cccc,CCCCCCCC). Subsequent bytes are optional parameters and are
+    specific to the cmd or status code. This may include a length
+    for command and status codes that need variable-length parameters.
+
+
+In addition, we use another interrupt pipe (endpoint) which the host polls
+periodically for flow control information. The peripheral, when there has
+been a change, sends the following 10-byte packet:
+
+	RRRRRRRRRRRRRRRR
+	T0T0T0T0T0T0T0T0
+	T1T1T1T1T1T1T1T1
+	T2T2T2T2T2T2T2T2
+	T3T3T3T3T3T3T3T3
+
+The first field is the 16-bit RxBytesAvail field, which indicates the
+number of bytes which may be read by the host from EP1. This is necessary:
+(a) because OSR2.1 has a bug which causes data loss if the peripheral returns
+fewer bytes than the host expects to read, and (b) because, on Microsoft
+platforms at least, an outstanding read posted on EP1 consumes about 35% of
+the CPU just polling the device for data.
+
+The next 4 fields are the 16-bit TxCredits for each port, which indicate how
+many bytes the host is allowed to send on EP1 for transmit to a given port.
+After an OPEN_PORT command, the Edgeport sends the initial TxCredits for that
+port.
+
+All 16-bit fields are sent in little-endian (Intel) format.
+
+************************************************************************/
+
+//
+// Define format of InterruptStatus packet returned from the
+// Interrupt pipe
+//
+
+struct int_status_pkt {
+	__u16 RxBytesAvail;			// Additional bytes available to
+						// be read from Bulk IN pipe
+	__u16 TxCredits[MAX_RS232_PORTS];	// Additional space available in
+						// given port's TxBuffer
+};
+
+
+#define GET_INT_STATUS_SIZE(NumPorts) (sizeof(__u16) + (sizeof(__u16) * (NumPorts)))
+
+
+
+//
+// Define cmd/status header values and macros to extract them.
+//
+//	Data:		0LLLLPPP LLLLLLLL
+//	Cmd/Stat:	1ccccPPP CCCCCCCC
+
+#define	IOSP_DATA_HDR_SIZE		2
+#define	IOSP_CMD_HDR_SIZE		2
+
+#define	IOSP_MAX_DATA_LENGTH		0x0FFF		// 12 bits -> 4K
+
+#define	IOSP_PORT_MASK			0x07		// Mask to isolate port number
+#define	IOSP_CMD_STAT_BIT		0x80		// If set, this is command/status header
+
+#define IS_CMD_STAT_HDR(Byte1)		((Byte1) & IOSP_CMD_STAT_BIT)
+#define IS_DATA_HDR(Byte1)		(!IS_CMD_STAT_HDR(Byte1))
+
+#define	IOSP_GET_HDR_PORT(Byte1)		((__u8) ((Byte1) & IOSP_PORT_MASK))
+#define	IOSP_GET_HDR_DATA_LEN(Byte1, Byte2)	((__u16) (((__u16)((Byte1) & 0x78)) << 5) | (Byte2))
+#define	IOSP_GET_STATUS_CODE(Byte1)		((__u8) (((Byte1) &  0x78) >> 3))
+
+
+//
+// These macros build the 1st and 2nd bytes for a data header
+//
+#define	IOSP_BUILD_DATA_HDR1(Port, Len)		((__u8) (((Port) | ((__u8) (((__u16) (Len)) >> 5) & 0x78))))
+#define	IOSP_BUILD_DATA_HDR2(Port, Len)		((__u8) (Len))
+
+
+//
+// These macros build the 1st and 2nd bytes for a command header
+//
+#define	IOSP_BUILD_CMD_HDR1(Port, Cmd)		((__u8) (IOSP_CMD_STAT_BIT | (Port) | ((__u8) ((Cmd) << 3))))
+
+
+//--------------------------------------------------------------
+//
+//	Define values for commands and command parameters
+//	(sent from Host to Edgeport)
+//
+//	1ccccPPP P1P1P1P1 [ P2P2P2P2P2 ]...
+//
+//	cccc:	00-07	2-byte commands. Write UART register 0-7 with
+//					value in P1. See 16650.H for definitions of
+//					UART register numbers and contents.
+//
+//		08-0B	3-byte commands:					==== P1 ====	==== P2 ====
+//					08	available for expansion
+//					09	1-param commands		Command Code	Param
+//					0A	available for expansion
+//					0B	available for expansion
+//
+//		0C-0D	4-byte commands.	P1 = extended cmd and P2,P3 = params
+//						Currently unimplemented.
+//
+//		0E-0F	N-byte commands:	P1 = num bytes after P1 (ie, TotalLen - 2)
+//						P2 = extended cmd, P3..Pn = parameters.
+//						Currently unimplemented.
+//
+
+#define	IOSP_WRITE_UART_REG(n)	((n) & 0x07)	// UartReg[ n ] := P1
+
+// Register numbers and contents
+// defined in 16554.H.
+
+//					0x08		// Available for expansion.
+#define	IOSP_EXT_CMD			0x09		// P1 = Command code (defined below)
+
+// P2 = Parameter
+
+//
+// Extended Command values, used with IOSP_EXT_CMD, may
+// or may not use parameter P2.
+//
+
+#define	IOSP_CMD_OPEN_PORT		0x00		// Enable ints, init UART. (NO PARAM)
+#define	IOSP_CMD_CLOSE_PORT		0x01		// Disable ints, flush buffers. (NO PARAM)
+#define	IOSP_CMD_CHASE_PORT		0x02		// Wait for Edgeport TX buffers to empty. (NO PARAM)
+#define IOSP_CMD_SET_RX_FLOW		0x03		// Set Rx Flow Control in Edgeport
+#define IOSP_CMD_SET_TX_FLOW		0x04		// Set Tx Flow Control in Edgeport
+#define IOSP_CMD_SET_XON_CHAR		0x05		// Set XON Character in Edgeport
+#define IOSP_CMD_SET_XOFF_CHAR		0x06		// Set XOFF Character in Edgeport
+#define IOSP_CMD_RX_CHECK_REQ		0x07		// Request Edgeport to insert a Checkpoint into
+
+// the receive data stream (Parameter = 1 byte sequence number)
+
+#define IOSP_CMD_SET_BREAK		0x08		// Turn on the BREAK (LCR bit 6)
+#define IOSP_CMD_CLEAR_BREAK		0x09		// Turn off the BREAK (LCR bit 6)
+
+
+//
+// Define macros to simplify building of IOSP cmds
+//
+
+#define MAKE_CMD_WRITE_REG(ppBuf, pLen, Port, Reg, Val)			\
+do {									\
+	(*(ppBuf))[0] = IOSP_BUILD_CMD_HDR1((Port),			\
+					    IOSP_WRITE_UART_REG(Reg));	\
+	(*(ppBuf))[1] = (Val);						\
+									\
+	*ppBuf += 2;							\
+	*pLen  += 2;							\
+} while (0)
+
+#define MAKE_CMD_EXT_CMD(ppBuf, pLen, Port, ExtCmd, Param)		\
+do {									\
+	(*(ppBuf))[0] = IOSP_BUILD_CMD_HDR1((Port), IOSP_EXT_CMD);	\
+	(*(ppBuf))[1] = (ExtCmd);					\
+	(*(ppBuf))[2] = (Param);					\
+									\
+	*ppBuf += 3;							\
+	*pLen  += 3;							\
+} while (0)
+
+
+
+//--------------------------------------------------------------
+//
+//	Define format of flow control commands
+//	(sent from Host to Edgeport)
+//
+//	11001PPP FlowCmd FlowTypes
+//
+//	Note that the 'FlowTypes' parameter is a bit mask; that is,
+//	more than one flow control type can be active at the same time.
+//	FlowTypes = 0 means 'no flow control'.
+//
+
+//
+//	IOSP_CMD_SET_RX_FLOW
+//
+//	Tells Edgeport how it can stop incoming UART data
+//
+//  Example for Port 0
+//	P0 = 11001000
+//  P1 = IOSP_CMD_SET_RX_FLOW
+//  P2 = Bit mask as follows:
+
+#define IOSP_RX_FLOW_RTS		0x01	// Edgeport drops RTS to stop incoming data
+#define IOSP_RX_FLOW_DTR		0x02	// Edgeport drops DTR to stop incoming data
+#define IOSP_RX_FLOW_DSR_SENSITIVITY	0x04	// Ignores Rx data unless DSR high
+
+// Not currently implemented by firmware.
+#define IOSP_RX_FLOW_XON_XOFF		0x08	// Edgeport sends XOFF char to stop incoming data.
+
+// Host must have previously programmed the
+// XON/XOFF values with SET_XON/SET_XOFF
+// before enabling this bit.
+
+//
+//	IOSP_CMD_SET_TX_FLOW
+//
+//	Tells Edgeport what signal(s) will stop it from transmitting UART data
+//
+//  Example for Port 0
+//	P0 = 11001000
+//  P1 = IOSP_CMD_SET_TX_FLOW
+//  P2 = Bit mask as follows:
+
+#define IOSP_TX_FLOW_CTS		0x01	// Edgeport stops Tx if CTS low
+#define IOSP_TX_FLOW_DSR		0x02	// Edgeport stops Tx if DSR low
+#define IOSP_TX_FLOW_DCD		0x04	// Edgeport stops Tx if DCD low
+#define IOSP_TX_FLOW_XON_XOFF		0x08	// Edgeport stops Tx upon receiving XOFF char.
+
+// Host must have previously programmed the
+// XON/XOFF values with SET_XON/SET_XOFF
+// before enabling this bit.
+#define IOSP_TX_FLOW_XOFF_CONTINUE	0x10	// If not set, Edgeport stops Tx when
+
+// sending XOFF in order to fix broken
+// systems that interpret the next
+// received char as XON.
+// If set, Edgeport continues Tx
+// normally after transmitting XOFF.
+// Not currently implemented by firmware.
+#define IOSP_TX_TOGGLE_RTS		0x20	// Edgeport drives RTS as a true half-duplex
+
+// Request-to-Send signal: it is raised before
+// beginning transmission and lowered after
+// the last Tx char leaves the UART.
+// Not currently implemented by firmware.
+
+//
+//	IOSP_CMD_SET_XON_CHAR
+//
+//	Sets the character which Edgeport transmits/interprets as XON.
+//	Note: This command MUST be sent before sending a SET_RX_FLOW or
+//	SET_TX_FLOW with the XON_XOFF bit set.
+//
+//  Example for Port 0
+//	P0 = 11001000
+//  P1 = IOSP_CMD_SET_XON_CHAR
+//  P2 = 0x11
+
+
+//
+//	IOSP_CMD_SET_XOFF_CHAR
+//
+//	Sets the character which Edgeport transmits/interprets as XOFF.
+//	Note: This command must be sent before sending a SET_RX_FLOW or
+//	SET_TX_FLOW with the XON_XOFF bit set.
+//
+//  Example for Port 0
+//	P0 = 11001000
+//  P1 = IOSP_CMD_SET_XOFF_CHAR
+//  P2 = 0x13
+
+
+//
+//	IOSP_CMD_RX_CHECK_REQ
+//
+//  This command is used to assist in the implementation of the
+//  IOCTL_SERIAL_PURGE Windows IOCTL.
+//  This IOSP command tries to place a marker at the end of the RX
+//  queue in the Edgeport. If the Edgeport RX queue is full then
+//  the Check will be discarded.
+//  It is up to the device driver to timeout waiting for the
+//  RX_CHECK_RSP.  If a RX_CHECK_RSP is received, the driver is
+//	sure that all data has been received from the edgeport and
+//	may now purge any internal RX buffers.
+//  Note tat the sequence numbers may be used to detect lost
+//  CHECK_REQs.
+
+//  Example for Port 0
+//	P0 = 11001000
+//  P1 = IOSP_CMD_RX_CHECK_REQ
+//  P2 = Sequence number
+
+
+//  Response will be:
+//  P1 = IOSP_EXT_RX_CHECK_RSP
+//  P2 = Request Sequence number
+
+
+
+//--------------------------------------------------------------
+//
+//	Define values for status and status parameters
+//	(received by Host from Edgeport)
+//
+//	1ssssPPP P1P1P1P1 [ P2P2P2P2P2 ]...
+//
+//	ssss:	00-07	2-byte status.	ssss identifies which UART register
+//					has changed value, and the new value is in P1.
+//					Note that the ssss values do not correspond to the
+//					16554 register numbers given in 16554.H. Instead,
+//					see below for definitions of the ssss numbers
+//					used in this status message.
+//
+//		08-0B	3-byte status:					==== P1 ====	==== P2 ====
+//					08	LSR_DATA:		New LSR		Errored byte
+//					09	1-param responses	Response Code	Param
+//					0A	OPEN_RSP:		InitialMsr	TxBufferSize
+//					0B	available for expansion
+//
+//		0C-0D	4-byte status.	P1 = extended status code and P2,P3 = params
+//					Not currently implemented.
+//
+//		0E-0F	N-byte status:	P1 = num bytes after P1 (ie, TotalLen - 2)
+//					P2 = extended status, P3..Pn = parameters.
+//					Not currently implemented.
+//
+
+/****************************************************
+ *	SSSS values for 2-byte status messages (0-8)
+ ****************************************************/
+
+#define	IOSP_STATUS_LSR			0x00	// P1 is new value of LSR register.
+
+// Bits defined in 16554.H. Edgeport
+// returns this in order to report
+// line status errors (overrun,
+// parity, framing, break). This form
+// is used when a errored receive data
+// character was NOT present in the
+// UART when the LSR error occurred
+// (ie, when LSR bit 0 = 0).
+
+#define	IOSP_STATUS_MSR			0x01	// P1 is new value of MSR register.
+
+// Bits defined in 16554.H. Edgeport
+// returns this in order to report
+// changes in modem status lines
+// (CTS, DSR, RI, CD)
+//
+
+//					0x02	// Available for future expansion
+//					0x03	//
+//					0x04	//
+//					0x05	//
+//					0x06	//
+//					0x07	//
+
+
+/****************************************************
+ *	SSSS values for 3-byte status messages (8-A)
+ ****************************************************/
+
+#define	IOSP_STATUS_LSR_DATA		0x08	// P1 is new value of LSR register (same as STATUS_LSR)
+
+// P2 is errored character read from
+//    RxFIFO after LSR reported an error.
+
+#define	IOSP_EXT_STATUS			0x09	// P1 is status/response code, param in P2.
+
+
+// Response Codes (P1 values) for 3-byte status messages
+
+#define	IOSP_EXT_STATUS_CHASE_RSP	0	// Reply to CHASE_PORT cmd. P2 is outcome:
+#define	IOSP_EXT_STATUS_CHASE_PASS	0	//	P2 = 0: All Tx data drained successfully
+#define	IOSP_EXT_STATUS_CHASE_FAIL	1	//	P2 = 1: Timed out (stuck due to flow
+
+//			control from remote device).
+
+#define	IOSP_EXT_STATUS_RX_CHECK_RSP	1	// Reply to RX_CHECK cmd. P2 is sequence number
+
+
+#define IOSP_STATUS_OPEN_RSP		0x0A	// Reply to OPEN_PORT cmd.
+
+// P1 is Initial MSR value
+// P2 is encoded TxBuffer Size:
+//	TxBufferSize = (P2 + 1) * 64
+
+//					0x0B	// Available for future expansion
+
+#define GET_TX_BUFFER_SIZE(P2) (((P2) + 1) * 64)
+
+
+
+
+/****************************************************
+ *	SSSS values for 4-byte status messages
+ ****************************************************/
+
+#define IOSP_EXT4_STATUS		0x0C	// Extended status code in P1,
+
+// Params in P2, P3
+// Currently unimplemented.
+
+//					0x0D	// Currently unused, available.
+
+
+
+//
+// Macros to parse status messages
+//
+
+#define	IOSP_GET_STATUS_LEN(code)	((code) < 8 ? 2 : ((code) < 0x0A ? 3 : 4))
+
+#define	IOSP_STATUS_IS_2BYTE(code)	((code) < 0x08)
+#define	IOSP_STATUS_IS_3BYTE(code)	(((code) >= 0x08) && ((code) <= 0x0B))
+#define	IOSP_STATUS_IS_4BYTE(code)	(((code) >= 0x0C) && ((code) <= 0x0D))
+