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, 608 insertions, 0 deletions

diff --git a/drivers/net/fddi/skfp/cfm.c b/drivers/net/fddi/skfp/cfm.c
new file mode 100644
index 000000000..4eea34080
--- /dev/null
+++ b/drivers/net/fddi/skfp/cfm.c
@@ -0,0 +1,608 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/******************************************************************************
+ *
+ *	(C)Copyright 1998,1999 SysKonnect,
+ *	a business unit of Schneider & Koch & Co. Datensysteme GmbH.
+ *
+ *	See the file "skfddi.c" for further information.
+ *
+ *	The information in this file is provided "AS IS" without warranty.
+ *
+ ******************************************************************************/
+
+/*
+	SMT CFM
+	Configuration Management
+	DAS with single MAC
+*/
+
+/*
+ *	Hardware independent state machine implemantation
+ *	The following external SMT functions are referenced :
+ *
+ *		queue_event()
+ *
+ *	The following external HW dependent functions are referenced :
+ *		config_mux()
+ *
+ *	The following HW dependent events are required :
+ *		NONE 
+ */
+
+#include "h/types.h"
+#include "h/fddi.h"
+#include "h/smc.h"
+
+#define KERNEL
+#include "h/smtstate.h"
+
+/*
+ * FSM Macros
+ */
+#define AFLAG	0x10
+#define GO_STATE(x)	(smc->mib.fddiSMTCF_State = (x)|AFLAG)
+#define ACTIONS_DONE()	(smc->mib.fddiSMTCF_State &= ~AFLAG)
+#define ACTIONS(x)	(x|AFLAG)
+
+/*
+ * symbolic state names
+ */
+static const char * const cfm_states[] = {
+	"SC0_ISOLATED","CF1","CF2","CF3","CF4",
+	"SC1_WRAP_A","SC2_WRAP_B","SC5_TRHU_B","SC7_WRAP_S",
+	"SC9_C_WRAP_A","SC10_C_WRAP_B","SC11_C_WRAP_S","SC4_THRU_A"
+} ;
+
+/*
+ * symbolic event names
+ */
+static const char * const cfm_events[] = {
+	"NONE","CF_LOOP_A","CF_LOOP_B","CF_JOIN_A","CF_JOIN_B"
+} ;
+
+/*
+ * map from state to downstream port type
+ */
+static const unsigned char cf_to_ptype[] = {
+	TNONE,TNONE,TNONE,TNONE,TNONE,
+	TNONE,TB,TB,TS,
+	TA,TB,TS,TB
+} ;
+
+/*
+ * CEM port states
+ */
+#define	CEM_PST_DOWN	0
+#define	CEM_PST_UP	1
+#define	CEM_PST_HOLD	2
+/* define portstate array only for A and B port */
+/* Do this within the smc structure (use in multiple cards) */
+
+/*
+ * all Globals  are defined in smc.h
+ * struct s_cfm
+ */
+
+/*
+ * function declarations
+ */
+static void cfm_fsm(struct s_smc *smc, int cmd);
+
+/*
+	init CFM state machine
+	clear all CFM vars and flags
+*/
+void cfm_init(struct s_smc *smc)
+{
+	smc->mib.fddiSMTCF_State = ACTIONS(SC0_ISOLATED) ;
+	smc->r.rm_join = 0 ;
+	smc->r.rm_loop = 0 ;
+	smc->y[PA].scrub = 0 ;
+	smc->y[PB].scrub = 0 ;
+	smc->y[PA].cem_pst = CEM_PST_DOWN ;
+	smc->y[PB].cem_pst = CEM_PST_DOWN ;
+}
+
+/* Some terms conditions used by the selection criteria */
+#define THRU_ENABLED(smc)	(smc->y[PA].pc_mode != PM_TREE && \
+				 smc->y[PB].pc_mode != PM_TREE)
+/* Selection criteria for the ports */
+static void selection_criteria (struct s_smc *smc, struct s_phy *phy)
+{
+
+	switch (phy->mib->fddiPORTMy_Type) {
+	case TA:
+		if ( !THRU_ENABLED(smc) && smc->y[PB].cf_join ) {
+			phy->wc_flag = TRUE ;
+		} else {
+			phy->wc_flag = FALSE ;
+		}
+
+		break;
+	case TB:
+		/* take precedence over PA */
+		phy->wc_flag = FALSE ;
+		break;
+	case TS:
+		phy->wc_flag = FALSE ;
+		break;
+	case TM:
+		phy->wc_flag = FALSE ;
+		break;
+	}
+
+}
+
+void all_selection_criteria(struct s_smc *smc)
+{
+	struct s_phy	*phy ;
+	int		p ;
+
+	for ( p = 0,phy = smc->y ; p < NUMPHYS; p++, phy++ ) {
+		/* Do the selection criteria */
+		selection_criteria (smc,phy);
+	}
+}
+
+static void cem_priv_state(struct s_smc *smc, int event)
+/* State machine for private PORT states: used to optimize dual homing */
+{
+	int	np;	/* Number of the port */
+	int	i;
+
+	/* Do this only in a DAS */
+	if (smc->s.sas != SMT_DAS )
+		return ;
+
+	np = event - CF_JOIN;
+
+	if (np != PA && np != PB) {
+		return ;
+	}
+	/* Change the port state according to the event (portnumber) */
+	if (smc->y[np].cf_join) {
+		smc->y[np].cem_pst = CEM_PST_UP ;
+	} else if (!smc->y[np].wc_flag) {
+		/* set the port to done only if it is not withheld */
+		smc->y[np].cem_pst = CEM_PST_DOWN ;
+	}
+
+	/* Don't set an hold port to down */
+
+	/* Check all ports of restart conditions */
+	for (i = 0 ; i < 2 ; i ++ ) {
+		/* Check all port for PORT is on hold and no withhold is done */
+		if ( smc->y[i].cem_pst == CEM_PST_HOLD && !smc->y[i].wc_flag ) {
+			smc->y[i].cem_pst = CEM_PST_DOWN;
+			queue_event(smc,(int)(EVENT_PCM+i),PC_START) ;
+		}
+		if ( smc->y[i].cem_pst == CEM_PST_UP && smc->y[i].wc_flag ) {
+			smc->y[i].cem_pst = CEM_PST_HOLD;
+			queue_event(smc,(int)(EVENT_PCM+i),PC_START) ;
+		}
+		if ( smc->y[i].cem_pst == CEM_PST_DOWN && smc->y[i].wc_flag ) {
+			/*
+			 * The port must be restarted when the wc_flag
+			 * will be reset. So set the port on hold.
+			 */
+			smc->y[i].cem_pst = CEM_PST_HOLD;
+		}
+	}
+	return ;
+}
+
+/*
+	CFM state machine
+	called by dispatcher
+
+	do
+		display state change
+		process event
+	until SM is stable
+*/
+void cfm(struct s_smc *smc, int event)
+{
+	int	state ;		/* remember last state */
+	int	cond ;
+
+	/* We will do the following: */
+	/*  - compute the variable WC_Flag for every port (This is where */
+	/*    we can extend the requested path checking !!) */
+	/*  - do the old (SMT 6.2 like) state machine */
+	/*  - do the resulting station states */
+
+	all_selection_criteria (smc);
+
+	/* We will check now whether a state transition is allowed or not */
+	/*  - change the portstates */
+	cem_priv_state (smc, event);
+
+	do {
+		DB_CFM("CFM : state %s%s event %s",
+		       smc->mib.fddiSMTCF_State & AFLAG ? "ACTIONS " : "",
+		       cfm_states[smc->mib.fddiSMTCF_State & ~AFLAG],
+		       cfm_events[event]);
+		state = smc->mib.fddiSMTCF_State ;
+		cfm_fsm(smc,event) ;
+		event = 0 ;
+	} while (state != smc->mib.fddiSMTCF_State) ;
+
+#ifndef	SLIM_SMT
+	/*
+	 * check peer wrap condition
+	 */
+	cond = FALSE ;
+	if (	(smc->mib.fddiSMTCF_State == SC9_C_WRAP_A &&
+		smc->y[PA].pc_mode == PM_PEER) 	||
+		(smc->mib.fddiSMTCF_State == SC10_C_WRAP_B &&
+		smc->y[PB].pc_mode == PM_PEER) 	||
+		(smc->mib.fddiSMTCF_State == SC11_C_WRAP_S &&
+		smc->y[PS].pc_mode == PM_PEER &&
+		smc->y[PS].mib->fddiPORTNeighborType != TS ) ) {
+			cond = TRUE ;
+	}
+	if (cond != smc->mib.fddiSMTPeerWrapFlag)
+		smt_srf_event(smc,SMT_COND_SMT_PEER_WRAP,0,cond) ;
+
+	/*
+	 * Don't ever send MAC_PATH_CHANGE events. Our MAC is hard-wired
+	 * to the primary path.
+	 */
+
+#endif	/* no SLIM_SMT */
+
+	/*
+	 * set MAC port type
+	 */
+	smc->mib.m[MAC0].fddiMACDownstreamPORTType =
+		cf_to_ptype[smc->mib.fddiSMTCF_State] ;
+	cfm_state_change(smc,(int)smc->mib.fddiSMTCF_State) ;
+}
+
+/*
+	process CFM event
+*/
+/*ARGSUSED1*/
+static void cfm_fsm(struct s_smc *smc, int cmd)
+{
+	switch(smc->mib.fddiSMTCF_State) {
+	case ACTIONS(SC0_ISOLATED) :
+		smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_ISOLATED ;
+		smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_ISOLATED ;
+		smc->mib.p[PA].fddiPORTMACPlacement = 0 ;
+		smc->mib.p[PB].fddiPORTMACPlacement = 0 ;
+		smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_SEPA ;
+		config_mux(smc,MUX_ISOLATE) ;	/* configure PHY Mux */
+		smc->r.rm_loop = FALSE ;
+		smc->r.rm_join = FALSE ;
+		queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
+		/* Don't do the WC-Flag changing here */
+		ACTIONS_DONE() ;
+		DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
+		break;
+	case SC0_ISOLATED :
+		/*SC07*/
+		/*SAS port can be PA or PB ! */
+		if (smc->s.sas && (smc->y[PA].cf_join || smc->y[PA].cf_loop ||
+				smc->y[PB].cf_join || smc->y[PB].cf_loop)) {
+			GO_STATE(SC11_C_WRAP_S) ;
+			break ;
+		}
+		/*SC01*/
+		if ((smc->y[PA].cem_pst == CEM_PST_UP && smc->y[PA].cf_join &&
+		     !smc->y[PA].wc_flag) || smc->y[PA].cf_loop) {
+			GO_STATE(SC9_C_WRAP_A) ;
+			break ;
+		}
+		/*SC02*/
+		if ((smc->y[PB].cem_pst == CEM_PST_UP && smc->y[PB].cf_join &&
+		     !smc->y[PB].wc_flag) || smc->y[PB].cf_loop) {
+			GO_STATE(SC10_C_WRAP_B) ;
+			break ;
+		}
+		break ;
+	case ACTIONS(SC9_C_WRAP_A) :
+		smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_CONCATENATED ;
+		smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_ISOLATED ;
+		smc->mib.p[PA].fddiPORTMACPlacement = INDEX_MAC ;
+		smc->mib.p[PB].fddiPORTMACPlacement = 0 ;
+		smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_CON ;
+		config_mux(smc,MUX_WRAPA) ;		/* configure PHY mux */
+		if (smc->y[PA].cf_loop) {
+			smc->r.rm_join = FALSE ;
+			smc->r.rm_loop = TRUE ;
+			queue_event(smc,EVENT_RMT,RM_LOOP) ;/* signal RMT */
+		}
+		if (smc->y[PA].cf_join) {
+			smc->r.rm_loop = FALSE ;
+			smc->r.rm_join = TRUE ;
+			queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
+		}
+		ACTIONS_DONE() ;
+		DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
+		break ;
+	case SC9_C_WRAP_A :
+		/*SC10*/
+		if ( (smc->y[PA].wc_flag || !smc->y[PA].cf_join) &&
+		      !smc->y[PA].cf_loop ) {
+			GO_STATE(SC0_ISOLATED) ;
+			break ;
+		}
+		/*SC12*/
+		else if ( (smc->y[PB].cf_loop && smc->y[PA].cf_join &&
+			   smc->y[PA].cem_pst == CEM_PST_UP) ||
+			  ((smc->y[PB].cf_loop ||
+			   (smc->y[PB].cf_join &&
+			    smc->y[PB].cem_pst == CEM_PST_UP)) &&
+			    (smc->y[PA].pc_mode == PM_TREE ||
+			     smc->y[PB].pc_mode == PM_TREE))) {
+			smc->y[PA].scrub = TRUE ;
+			GO_STATE(SC10_C_WRAP_B) ;
+			break ;
+		}
+		/*SC14*/
+		else if (!smc->s.attach_s &&
+			  smc->y[PA].cf_join &&
+			  smc->y[PA].cem_pst == CEM_PST_UP &&
+			  smc->y[PA].pc_mode == PM_PEER && smc->y[PB].cf_join &&
+			  smc->y[PB].cem_pst == CEM_PST_UP &&
+			  smc->y[PB].pc_mode == PM_PEER) {
+			smc->y[PA].scrub = TRUE ;
+			smc->y[PB].scrub = TRUE ;
+			GO_STATE(SC4_THRU_A) ;
+			break ;
+		}
+		/*SC15*/
+		else if ( smc->s.attach_s &&
+			  smc->y[PA].cf_join &&
+			  smc->y[PA].cem_pst == CEM_PST_UP &&
+			  smc->y[PA].pc_mode == PM_PEER &&
+			  smc->y[PB].cf_join &&
+			  smc->y[PB].cem_pst == CEM_PST_UP &&
+			  smc->y[PB].pc_mode == PM_PEER) {
+			smc->y[PA].scrub = TRUE ;
+			smc->y[PB].scrub = TRUE ;
+			GO_STATE(SC5_THRU_B) ;
+			break ;
+		}
+		break ;
+	case ACTIONS(SC10_C_WRAP_B) :
+		smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_ISOLATED ;
+		smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_CONCATENATED ;
+		smc->mib.p[PA].fddiPORTMACPlacement = 0 ;
+		smc->mib.p[PB].fddiPORTMACPlacement = INDEX_MAC ;
+		smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_CON ;
+		config_mux(smc,MUX_WRAPB) ;		/* configure PHY mux */
+		if (smc->y[PB].cf_loop) {
+			smc->r.rm_join = FALSE ;
+			smc->r.rm_loop = TRUE ;
+			queue_event(smc,EVENT_RMT,RM_LOOP) ;/* signal RMT */
+		}
+		if (smc->y[PB].cf_join) {
+			smc->r.rm_loop = FALSE ;
+			smc->r.rm_join = TRUE ;
+			queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
+		}
+		ACTIONS_DONE() ;
+		DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
+		break ;
+	case SC10_C_WRAP_B :
+		/*SC20*/
+		if ( !smc->y[PB].cf_join && !smc->y[PB].cf_loop ) {
+			GO_STATE(SC0_ISOLATED) ;
+			break ;
+		}
+		/*SC21*/
+		else if ( smc->y[PA].cf_loop && smc->y[PA].pc_mode == PM_PEER &&
+			  smc->y[PB].cf_join && smc->y[PB].pc_mode == PM_PEER) {
+			smc->y[PB].scrub = TRUE ;
+			GO_STATE(SC9_C_WRAP_A) ;
+			break ;
+		}
+		/*SC24*/
+		else if (!smc->s.attach_s &&
+			 smc->y[PA].cf_join && smc->y[PA].pc_mode == PM_PEER &&
+			 smc->y[PB].cf_join && smc->y[PB].pc_mode == PM_PEER) {
+			smc->y[PA].scrub = TRUE ;
+			smc->y[PB].scrub = TRUE ;
+			GO_STATE(SC4_THRU_A) ;
+			break ;
+		}
+		/*SC25*/
+		else if ( smc->s.attach_s &&
+			 smc->y[PA].cf_join && smc->y[PA].pc_mode == PM_PEER &&
+			 smc->y[PB].cf_join && smc->y[PB].pc_mode == PM_PEER) {
+			smc->y[PA].scrub = TRUE ;
+			smc->y[PB].scrub = TRUE ;
+			GO_STATE(SC5_THRU_B) ;
+			break ;
+		}
+		break ;
+	case ACTIONS(SC4_THRU_A) :
+		smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_THRU ;
+		smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_THRU ;
+		smc->mib.p[PA].fddiPORTMACPlacement = 0 ;
+		smc->mib.p[PB].fddiPORTMACPlacement = INDEX_MAC ;
+		smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_THRU ;
+		config_mux(smc,MUX_THRUA) ;		/* configure PHY mux */
+		smc->r.rm_loop = FALSE ;
+		smc->r.rm_join = TRUE ;
+		queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
+		ACTIONS_DONE() ;
+		DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
+		break ;
+	case SC4_THRU_A :
+		/*SC41*/
+		if (smc->y[PB].wc_flag || !smc->y[PB].cf_join) {
+			smc->y[PA].scrub = TRUE ;
+			GO_STATE(SC9_C_WRAP_A) ;
+			break ;
+		}
+		/*SC42*/
+		else if (!smc->y[PA].cf_join || smc->y[PA].wc_flag) {
+			smc->y[PB].scrub = TRUE ;
+			GO_STATE(SC10_C_WRAP_B) ;
+			break ;
+		}
+		/*SC45*/
+		else if (smc->s.attach_s) {
+			smc->y[PB].scrub = TRUE ;
+			GO_STATE(SC5_THRU_B) ;
+			break ;
+		}
+		break ;
+	case ACTIONS(SC5_THRU_B) :
+		smc->mib.p[PA].fddiPORTCurrentPath = MIB_PATH_THRU ;
+		smc->mib.p[PB].fddiPORTCurrentPath = MIB_PATH_THRU ;
+		smc->mib.p[PA].fddiPORTMACPlacement = INDEX_MAC ;
+		smc->mib.p[PB].fddiPORTMACPlacement = 0 ;
+		smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_THRU ;
+		config_mux(smc,MUX_THRUB) ;		/* configure PHY mux */
+		smc->r.rm_loop = FALSE ;
+		smc->r.rm_join = TRUE ;
+		queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
+		ACTIONS_DONE() ;
+		DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
+		break ;
+	case SC5_THRU_B :
+		/*SC51*/
+		if (!smc->y[PB].cf_join || smc->y[PB].wc_flag) {
+			smc->y[PA].scrub = TRUE ;
+			GO_STATE(SC9_C_WRAP_A) ;
+			break ;
+		}
+		/*SC52*/
+		else if (!smc->y[PA].cf_join || smc->y[PA].wc_flag) {
+			smc->y[PB].scrub = TRUE ;
+			GO_STATE(SC10_C_WRAP_B) ;
+			break ;
+		}
+		/*SC54*/
+		else if (!smc->s.attach_s) {
+			smc->y[PA].scrub = TRUE ;
+			GO_STATE(SC4_THRU_A) ;
+			break ;
+		}
+		break ;
+	case ACTIONS(SC11_C_WRAP_S) :
+		smc->mib.p[PS].fddiPORTCurrentPath = MIB_PATH_CONCATENATED ;
+		smc->mib.p[PS].fddiPORTMACPlacement = INDEX_MAC ;
+		smc->mib.fddiSMTStationStatus = MIB_SMT_STASTA_CON ;
+		config_mux(smc,MUX_WRAPS) ;		/* configure PHY mux */
+		if (smc->y[PA].cf_loop || smc->y[PB].cf_loop) {
+			smc->r.rm_join = FALSE ;
+			smc->r.rm_loop = TRUE ;
+			queue_event(smc,EVENT_RMT,RM_LOOP) ;/* signal RMT */
+		}
+		if (smc->y[PA].cf_join || smc->y[PB].cf_join) {
+			smc->r.rm_loop = FALSE ;
+			smc->r.rm_join = TRUE ;
+			queue_event(smc,EVENT_RMT,RM_JOIN) ;/* signal RMT */
+		}
+		ACTIONS_DONE() ;
+		DB_CFMN(1, "CFM : %s", cfm_states[smc->mib.fddiSMTCF_State]);
+		break ;
+	case SC11_C_WRAP_S :
+		/*SC70*/
+		if ( !smc->y[PA].cf_join && !smc->y[PA].cf_loop &&
+		     !smc->y[PB].cf_join && !smc->y[PB].cf_loop) {
+			GO_STATE(SC0_ISOLATED) ;
+			break ;
+		}
+		break ;
+	default:
+		SMT_PANIC(smc,SMT_E0106, SMT_E0106_MSG) ;
+		break;
+	}
+}
+
+/*
+ * get MAC's input Port
+ *	return :
+ *		PA or PB
+ */
+int cfm_get_mac_input(struct s_smc *smc)
+{
+	return (smc->mib.fddiSMTCF_State == SC10_C_WRAP_B ||
+		smc->mib.fddiSMTCF_State == SC5_THRU_B) ? PB : PA;
+}
+
+/*
+ * get MAC's output Port
+ *	return :
+ *		PA or PB
+ */
+int cfm_get_mac_output(struct s_smc *smc)
+{
+	return (smc->mib.fddiSMTCF_State == SC10_C_WRAP_B ||
+		smc->mib.fddiSMTCF_State == SC4_THRU_A) ? PB : PA;
+}
+
+static char path_iso[] = {
+	0,0,	0,RES_PORT,	0,PA + INDEX_PORT,	0,PATH_ISO,
+	0,0,	0,RES_MAC,	0,INDEX_MAC,		0,PATH_ISO,
+	0,0,	0,RES_PORT,	0,PB + INDEX_PORT,	0,PATH_ISO
+} ;
+
+static char path_wrap_a[] = {
+	0,0,	0,RES_PORT,	0,PA + INDEX_PORT,	0,PATH_PRIM,
+	0,0,	0,RES_MAC,	0,INDEX_MAC,		0,PATH_PRIM,
+	0,0,	0,RES_PORT,	0,PB + INDEX_PORT,	0,PATH_ISO
+} ;
+
+static char path_wrap_b[] = {
+	0,0,	0,RES_PORT,	0,PB + INDEX_PORT,	0,PATH_PRIM,
+	0,0,	0,RES_MAC,	0,INDEX_MAC,		0,PATH_PRIM,
+	0,0,	0,RES_PORT,	0,PA + INDEX_PORT,	0,PATH_ISO
+} ;
+
+static char path_thru[] = {
+	0,0,	0,RES_PORT,	0,PA + INDEX_PORT,	0,PATH_PRIM,
+	0,0,	0,RES_MAC,	0,INDEX_MAC,		0,PATH_PRIM,
+	0,0,	0,RES_PORT,	0,PB + INDEX_PORT,	0,PATH_PRIM
+} ;
+
+static char path_wrap_s[] = {
+	0,0,	0,RES_PORT,	0,PS + INDEX_PORT,	0,PATH_PRIM,
+	0,0,	0,RES_MAC,	0,INDEX_MAC,		0,PATH_PRIM,
+} ;
+
+static char path_iso_s[] = {
+	0,0,	0,RES_PORT,	0,PS + INDEX_PORT,	0,PATH_ISO,
+	0,0,	0,RES_MAC,	0,INDEX_MAC,		0,PATH_ISO,
+} ;
+
+int cem_build_path(struct s_smc *smc, char *to, int path_index)
+{
+	char	*path ;
+	int	len ;
+
+	switch (smc->mib.fddiSMTCF_State) {
+	default :
+	case SC0_ISOLATED :
+		path = smc->s.sas ? path_iso_s : path_iso ;
+		len = smc->s.sas ? sizeof(path_iso_s) :  sizeof(path_iso) ;
+		break ;
+	case SC9_C_WRAP_A :
+		path = path_wrap_a ;
+		len = sizeof(path_wrap_a) ;
+		break ;
+	case SC10_C_WRAP_B :
+		path = path_wrap_b ;
+		len = sizeof(path_wrap_b) ;
+		break ;
+	case SC4_THRU_A :
+		path = path_thru ;
+		len = sizeof(path_thru) ;
+		break ;
+	case SC11_C_WRAP_S :
+		path = path_wrap_s ;
+		len = sizeof(path_wrap_s) ;
+		break ;
+	}
+	memcpy(to,path,len) ;
+
+	LINT_USE(path_index);
+
+	return len;
+}