From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- drivers/net/fddi/skfp/rmt.c | 642 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 642 insertions(+) create mode 100644 drivers/net/fddi/skfp/rmt.c (limited to 'drivers/net/fddi/skfp/rmt.c') diff --git a/drivers/net/fddi/skfp/rmt.c b/drivers/net/fddi/skfp/rmt.c new file mode 100644 index 000000000..37a89675d --- /dev/null +++ b/drivers/net/fddi/skfp/rmt.c @@ -0,0 +1,642 @@ +// 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 RMT + Ring Management +*/ + +/* + * Hardware independent state machine implemantation + * The following external SMT functions are referenced : + * + * queue_event() + * smt_timer_start() + * smt_timer_stop() + * + * The following external HW dependent functions are referenced : + * sm_ma_control() + * sm_mac_check_beacon_claim() + * + * The following HW dependent events are required : + * RM_RING_OP + * RM_RING_NON_OP + * RM_MY_BEACON + * RM_OTHER_BEACON + * RM_MY_CLAIM + * RM_TRT_EXP + * RM_VALID_CLAIM + * + */ + +#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.m[MAC0].fddiMACRMTState = (x)|AFLAG) +#define ACTIONS_DONE() (smc->mib.m[MAC0].fddiMACRMTState &= ~AFLAG) +#define ACTIONS(x) (x|AFLAG) + +#define RM0_ISOLATED 0 +#define RM1_NON_OP 1 /* not operational */ +#define RM2_RING_OP 2 /* ring operational */ +#define RM3_DETECT 3 /* detect dupl addresses */ +#define RM4_NON_OP_DUP 4 /* dupl. addr detected */ +#define RM5_RING_OP_DUP 5 /* ring oper. with dupl. addr */ +#define RM6_DIRECTED 6 /* sending directed beacons */ +#define RM7_TRACE 7 /* trace initiated */ + +/* + * symbolic state names + */ +static const char * const rmt_states[] = { + "RM0_ISOLATED","RM1_NON_OP","RM2_RING_OP","RM3_DETECT", + "RM4_NON_OP_DUP","RM5_RING_OP_DUP","RM6_DIRECTED", + "RM7_TRACE" +} ; + +/* + * symbolic event names + */ +static const char * const rmt_events[] = { + "NONE","RM_RING_OP","RM_RING_NON_OP","RM_MY_BEACON", + "RM_OTHER_BEACON","RM_MY_CLAIM","RM_TRT_EXP","RM_VALID_CLAIM", + "RM_JOIN","RM_LOOP","RM_DUP_ADDR","RM_ENABLE_FLAG", + "RM_TIMEOUT_NON_OP","RM_TIMEOUT_T_STUCK", + "RM_TIMEOUT_ANNOUNCE","RM_TIMEOUT_T_DIRECT", + "RM_TIMEOUT_D_MAX","RM_TIMEOUT_POLL","RM_TX_STATE_CHANGE" +} ; + +/* + * Globals + * in struct s_rmt + */ + + +/* + * function declarations + */ +static void rmt_fsm(struct s_smc *smc, int cmd); +static void start_rmt_timer0(struct s_smc *smc, u_long value, int event); +static void start_rmt_timer1(struct s_smc *smc, u_long value, int event); +static void start_rmt_timer2(struct s_smc *smc, u_long value, int event); +static void stop_rmt_timer0(struct s_smc *smc); +static void stop_rmt_timer1(struct s_smc *smc); +static void stop_rmt_timer2(struct s_smc *smc); +static void rmt_dup_actions(struct s_smc *smc); +static void rmt_reinsert_actions(struct s_smc *smc); +static void rmt_leave_actions(struct s_smc *smc); +static void rmt_new_dup_actions(struct s_smc *smc); + +#ifndef SUPERNET_3 +extern void restart_trt_for_dbcn() ; +#endif /*SUPERNET_3*/ + +/* + init RMT state machine + clear all RMT vars and flags +*/ +void rmt_init(struct s_smc *smc) +{ + smc->mib.m[MAC0].fddiMACRMTState = ACTIONS(RM0_ISOLATED) ; + smc->r.dup_addr_test = DA_NONE ; + smc->r.da_flag = 0 ; + smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ; + smc->r.sm_ma_avail = FALSE ; + smc->r.loop_avail = 0 ; + smc->r.bn_flag = 0 ; + smc->r.jm_flag = 0 ; + smc->r.no_flag = TRUE ; +} + +/* + RMT state machine + called by dispatcher + + do + display state change + process event + until SM is stable +*/ +void rmt(struct s_smc *smc, int event) +{ + int state ; + + do { + DB_RMT("RMT : state %s%s event %s", + smc->mib.m[MAC0].fddiMACRMTState & AFLAG ? "ACTIONS " : "", + rmt_states[smc->mib.m[MAC0].fddiMACRMTState & ~AFLAG], + rmt_events[event]); + state = smc->mib.m[MAC0].fddiMACRMTState ; + rmt_fsm(smc,event) ; + event = 0 ; + } while (state != smc->mib.m[MAC0].fddiMACRMTState) ; + rmt_state_change(smc,(int)smc->mib.m[MAC0].fddiMACRMTState) ; +} + +/* + process RMT event +*/ +static void rmt_fsm(struct s_smc *smc, int cmd) +{ + /* + * RM00-RM70 : from all states + */ + if (!smc->r.rm_join && !smc->r.rm_loop && + smc->mib.m[MAC0].fddiMACRMTState != ACTIONS(RM0_ISOLATED) && + smc->mib.m[MAC0].fddiMACRMTState != RM0_ISOLATED) { + RS_SET(smc,RS_NORINGOP) ; + rmt_indication(smc,0) ; + GO_STATE(RM0_ISOLATED) ; + return ; + } + + switch(smc->mib.m[MAC0].fddiMACRMTState) { + case ACTIONS(RM0_ISOLATED) : + stop_rmt_timer0(smc) ; + stop_rmt_timer1(smc) ; + stop_rmt_timer2(smc) ; + + /* + * Disable MAC. + */ + sm_ma_control(smc,MA_OFFLINE) ; + smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ; + smc->r.loop_avail = FALSE ; + smc->r.sm_ma_avail = FALSE ; + smc->r.no_flag = TRUE ; + DB_RMTN(1, "RMT : ISOLATED"); + ACTIONS_DONE() ; + break ; + case RM0_ISOLATED : + /*RM01*/ + if (smc->r.rm_join || smc->r.rm_loop) { + /* + * According to the standard the MAC must be reset + * here. The FORMAC will be initialized and Claim + * and Beacon Frames will be uploaded to the MAC. + * So any change of Treq will take effect NOW. + */ + sm_ma_control(smc,MA_RESET) ; + GO_STATE(RM1_NON_OP) ; + break ; + } + break ; + case ACTIONS(RM1_NON_OP) : + start_rmt_timer0(smc,smc->s.rmt_t_non_op,RM_TIMEOUT_NON_OP) ; + stop_rmt_timer1(smc) ; + stop_rmt_timer2(smc) ; + sm_ma_control(smc,MA_BEACON) ; + DB_RMTN(1, "RMT : RING DOWN"); + RS_SET(smc,RS_NORINGOP) ; + smc->r.sm_ma_avail = FALSE ; + rmt_indication(smc,0) ; + ACTIONS_DONE() ; + break ; + case RM1_NON_OP : + /*RM12*/ + if (cmd == RM_RING_OP) { + RS_SET(smc,RS_RINGOPCHANGE) ; + GO_STATE(RM2_RING_OP) ; + break ; + } + /*RM13*/ + else if (cmd == RM_TIMEOUT_NON_OP) { + smc->r.bn_flag = FALSE ; + smc->r.no_flag = TRUE ; + GO_STATE(RM3_DETECT) ; + break ; + } + break ; + case ACTIONS(RM2_RING_OP) : + stop_rmt_timer0(smc) ; + stop_rmt_timer1(smc) ; + stop_rmt_timer2(smc) ; + smc->r.no_flag = FALSE ; + if (smc->r.rm_loop) + smc->r.loop_avail = TRUE ; + if (smc->r.rm_join) { + smc->r.sm_ma_avail = TRUE ; + if (smc->mib.m[MAC0].fddiMACMA_UnitdataEnable) + smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = TRUE ; + else + smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ; + } + DB_RMTN(1, "RMT : RING UP"); + RS_CLEAR(smc,RS_NORINGOP) ; + RS_SET(smc,RS_RINGOPCHANGE) ; + rmt_indication(smc,1) ; + smt_stat_counter(smc,0) ; + ACTIONS_DONE() ; + break ; + case RM2_RING_OP : + /*RM21*/ + if (cmd == RM_RING_NON_OP) { + smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ; + smc->r.loop_avail = FALSE ; + RS_SET(smc,RS_RINGOPCHANGE) ; + GO_STATE(RM1_NON_OP) ; + break ; + } + /*RM22a*/ + else if (cmd == RM_ENABLE_FLAG) { + if (smc->mib.m[MAC0].fddiMACMA_UnitdataEnable) + smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = TRUE ; + else + smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ; + } + /*RM25*/ + else if (smc->r.dup_addr_test == DA_FAILED) { + smc->mib.m[MAC0].fddiMACMA_UnitdataAvailable = FALSE ; + smc->r.loop_avail = FALSE ; + smc->r.da_flag = TRUE ; + GO_STATE(RM5_RING_OP_DUP) ; + break ; + } + break ; + case ACTIONS(RM3_DETECT) : + start_rmt_timer0(smc,smc->s.mac_d_max*2,RM_TIMEOUT_D_MAX) ; + start_rmt_timer1(smc,smc->s.rmt_t_stuck,RM_TIMEOUT_T_STUCK) ; + start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL) ; + sm_mac_check_beacon_claim(smc) ; + DB_RMTN(1, "RMT : RM3_DETECT"); + ACTIONS_DONE() ; + break ; + case RM3_DETECT : + if (cmd == RM_TIMEOUT_POLL) { + start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL); + sm_mac_check_beacon_claim(smc) ; + break ; + } + if (cmd == RM_TIMEOUT_D_MAX) { + smc->r.timer0_exp = TRUE ; + } + /* + *jd(22-Feb-1999) + * We need a time ">= 2*mac_d_max" since we had finished + * Claim or Beacon state. So we will restart timer0 at + * every state change. + */ + if (cmd == RM_TX_STATE_CHANGE) { + start_rmt_timer0(smc, + smc->s.mac_d_max*2, + RM_TIMEOUT_D_MAX) ; + } + /*RM32*/ + if (cmd == RM_RING_OP) { + GO_STATE(RM2_RING_OP) ; + break ; + } + /*RM33a*/ + else if ((cmd == RM_MY_BEACON || cmd == RM_OTHER_BEACON) + && smc->r.bn_flag) { + smc->r.bn_flag = FALSE ; + } + /*RM33b*/ + else if (cmd == RM_TRT_EXP && !smc->r.bn_flag) { + int tx ; + /* + * set bn_flag only if in state T4 or T5: + * only if we're the beaconer should we start the + * trace ! + */ + if ((tx = sm_mac_get_tx_state(smc)) == 4 || tx == 5) { + DB_RMTN(2, "RMT : DETECT && TRT_EXPIRED && T4/T5"); + smc->r.bn_flag = TRUE ; + /* + * If one of the upstream stations beaconed + * and the link to the upstream neighbor is + * lost we need to restart the stuck timer to + * check the "stuck beacon" condition. + */ + start_rmt_timer1(smc,smc->s.rmt_t_stuck, + RM_TIMEOUT_T_STUCK) ; + } + /* + * We do NOT need to clear smc->r.bn_flag in case of + * not being in state T4 or T5, because the flag + * must be cleared in order to get in this condition. + */ + + DB_RMTN(2, "RMT : sm_mac_get_tx_state() = %d (bn_flag = %d)", + tx, smc->r.bn_flag); + } + /*RM34a*/ + else if (cmd == RM_MY_CLAIM && smc->r.timer0_exp) { + rmt_new_dup_actions(smc) ; + GO_STATE(RM4_NON_OP_DUP) ; + break ; + } + /*RM34b*/ + else if (cmd == RM_MY_BEACON && smc->r.timer0_exp) { + rmt_new_dup_actions(smc) ; + GO_STATE(RM4_NON_OP_DUP) ; + break ; + } + /*RM34c*/ + else if (cmd == RM_VALID_CLAIM) { + rmt_new_dup_actions(smc) ; + GO_STATE(RM4_NON_OP_DUP) ; + break ; + } + /*RM36*/ + else if (cmd == RM_TIMEOUT_T_STUCK && + smc->r.rm_join && smc->r.bn_flag) { + GO_STATE(RM6_DIRECTED) ; + break ; + } + break ; + case ACTIONS(RM4_NON_OP_DUP) : + start_rmt_timer0(smc,smc->s.rmt_t_announce,RM_TIMEOUT_ANNOUNCE); + start_rmt_timer1(smc,smc->s.rmt_t_stuck,RM_TIMEOUT_T_STUCK) ; + start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL) ; + sm_mac_check_beacon_claim(smc) ; + DB_RMTN(1, "RMT : RM4_NON_OP_DUP"); + ACTIONS_DONE() ; + break ; + case RM4_NON_OP_DUP : + if (cmd == RM_TIMEOUT_POLL) { + start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL); + sm_mac_check_beacon_claim(smc) ; + break ; + } + /*RM41*/ + if (!smc->r.da_flag) { + GO_STATE(RM1_NON_OP) ; + break ; + } + /*RM44a*/ + else if ((cmd == RM_MY_BEACON || cmd == RM_OTHER_BEACON) && + smc->r.bn_flag) { + smc->r.bn_flag = FALSE ; + } + /*RM44b*/ + else if (cmd == RM_TRT_EXP && !smc->r.bn_flag) { + int tx ; + /* + * set bn_flag only if in state T4 or T5: + * only if we're the beaconer should we start the + * trace ! + */ + if ((tx = sm_mac_get_tx_state(smc)) == 4 || tx == 5) { + DB_RMTN(2, "RMT : NOPDUP && TRT_EXPIRED && T4/T5"); + smc->r.bn_flag = TRUE ; + /* + * If one of the upstream stations beaconed + * and the link to the upstream neighbor is + * lost we need to restart the stuck timer to + * check the "stuck beacon" condition. + */ + start_rmt_timer1(smc,smc->s.rmt_t_stuck, + RM_TIMEOUT_T_STUCK) ; + } + /* + * We do NOT need to clear smc->r.bn_flag in case of + * not being in state T4 or T5, because the flag + * must be cleared in order to get in this condition. + */ + + DB_RMTN(2, "RMT : sm_mac_get_tx_state() = %d (bn_flag = %d)", + tx, smc->r.bn_flag); + } + /*RM44c*/ + else if (cmd == RM_TIMEOUT_ANNOUNCE && !smc->r.bn_flag) { + rmt_dup_actions(smc) ; + } + /*RM45*/ + else if (cmd == RM_RING_OP) { + smc->r.no_flag = FALSE ; + GO_STATE(RM5_RING_OP_DUP) ; + break ; + } + /*RM46*/ + else if (cmd == RM_TIMEOUT_T_STUCK && + smc->r.rm_join && smc->r.bn_flag) { + GO_STATE(RM6_DIRECTED) ; + break ; + } + break ; + case ACTIONS(RM5_RING_OP_DUP) : + stop_rmt_timer0(smc) ; + stop_rmt_timer1(smc) ; + stop_rmt_timer2(smc) ; + DB_RMTN(1, "RMT : RM5_RING_OP_DUP"); + ACTIONS_DONE() ; + break; + case RM5_RING_OP_DUP : + /*RM52*/ + if (smc->r.dup_addr_test == DA_PASSED) { + smc->r.da_flag = FALSE ; + GO_STATE(RM2_RING_OP) ; + break ; + } + /*RM54*/ + else if (cmd == RM_RING_NON_OP) { + smc->r.jm_flag = FALSE ; + smc->r.bn_flag = FALSE ; + GO_STATE(RM4_NON_OP_DUP) ; + break ; + } + break ; + case ACTIONS(RM6_DIRECTED) : + start_rmt_timer0(smc,smc->s.rmt_t_direct,RM_TIMEOUT_T_DIRECT) ; + stop_rmt_timer1(smc) ; + start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL) ; + sm_ma_control(smc,MA_DIRECTED) ; + RS_SET(smc,RS_BEACON) ; + DB_RMTN(1, "RMT : RM6_DIRECTED"); + ACTIONS_DONE() ; + break ; + case RM6_DIRECTED : + /*RM63*/ + if (cmd == RM_TIMEOUT_POLL) { + start_rmt_timer2(smc,smc->s.rmt_t_poll,RM_TIMEOUT_POLL); + sm_mac_check_beacon_claim(smc) ; +#ifndef SUPERNET_3 + /* Because of problems with the Supernet II chip set + * sending of Directed Beacon will stop after 165ms + * therefore restart_trt_for_dbcn(smc) will be called + * to prevent this. + */ + restart_trt_for_dbcn(smc) ; +#endif /*SUPERNET_3*/ + break ; + } + if ((cmd == RM_MY_BEACON || cmd == RM_OTHER_BEACON) && + !smc->r.da_flag) { + smc->r.bn_flag = FALSE ; + GO_STATE(RM3_DETECT) ; + break ; + } + /*RM64*/ + else if ((cmd == RM_MY_BEACON || cmd == RM_OTHER_BEACON) && + smc->r.da_flag) { + smc->r.bn_flag = FALSE ; + GO_STATE(RM4_NON_OP_DUP) ; + break ; + } + /*RM67*/ + else if (cmd == RM_TIMEOUT_T_DIRECT) { + GO_STATE(RM7_TRACE) ; + break ; + } + break ; + case ACTIONS(RM7_TRACE) : + stop_rmt_timer0(smc) ; + stop_rmt_timer1(smc) ; + stop_rmt_timer2(smc) ; + smc->e.trace_prop |= ENTITY_BIT(ENTITY_MAC) ; + queue_event(smc,EVENT_ECM,EC_TRACE_PROP) ; + DB_RMTN(1, "RMT : RM7_TRACE"); + ACTIONS_DONE() ; + break ; + case RM7_TRACE : + break ; + default: + SMT_PANIC(smc,SMT_E0122, SMT_E0122_MSG) ; + break; + } +} + +/* + * (jd) RMT duplicate address actions + * leave the ring or reinsert just as configured + */ +static void rmt_dup_actions(struct s_smc *smc) +{ + if (smc->r.jm_flag) { + } + else { + if (smc->s.rmt_dup_mac_behavior) { + SMT_ERR_LOG(smc,SMT_E0138, SMT_E0138_MSG) ; + rmt_reinsert_actions(smc) ; + } + else { + SMT_ERR_LOG(smc,SMT_E0135, SMT_E0135_MSG) ; + rmt_leave_actions(smc) ; + } + } +} + +/* + * Reconnect to the Ring + */ +static void rmt_reinsert_actions(struct s_smc *smc) +{ + queue_event(smc,EVENT_ECM,EC_DISCONNECT) ; + queue_event(smc,EVENT_ECM,EC_CONNECT) ; +} + +/* + * duplicate address detected + */ +static void rmt_new_dup_actions(struct s_smc *smc) +{ + smc->r.da_flag = TRUE ; + smc->r.bn_flag = FALSE ; + smc->r.jm_flag = FALSE ; + /* + * we have three options : change address, jam or leave + * we leave the ring as default + * Optionally it's possible to reinsert after leaving the Ring + * but this will not conform with SMT Spec. + */ + if (smc->s.rmt_dup_mac_behavior) { + SMT_ERR_LOG(smc,SMT_E0138, SMT_E0138_MSG) ; + rmt_reinsert_actions(smc) ; + } + else { + SMT_ERR_LOG(smc,SMT_E0135, SMT_E0135_MSG) ; + rmt_leave_actions(smc) ; + } +} + + +/* + * leave the ring + */ +static void rmt_leave_actions(struct s_smc *smc) +{ + queue_event(smc,EVENT_ECM,EC_DISCONNECT) ; + /* + * Note: Do NOT try again later. (with please reconnect) + * The station must be left from the ring! + */ +} + +/* + * SMT timer interface + * start RMT timer 0 + */ +static void start_rmt_timer0(struct s_smc *smc, u_long value, int event) +{ + smc->r.timer0_exp = FALSE ; /* clear timer event flag */ + smt_timer_start(smc,&smc->r.rmt_timer0,value,EV_TOKEN(EVENT_RMT,event)); +} + +/* + * SMT timer interface + * start RMT timer 1 + */ +static void start_rmt_timer1(struct s_smc *smc, u_long value, int event) +{ + smc->r.timer1_exp = FALSE ; /* clear timer event flag */ + smt_timer_start(smc,&smc->r.rmt_timer1,value,EV_TOKEN(EVENT_RMT,event)); +} + +/* + * SMT timer interface + * start RMT timer 2 + */ +static void start_rmt_timer2(struct s_smc *smc, u_long value, int event) +{ + smc->r.timer2_exp = FALSE ; /* clear timer event flag */ + smt_timer_start(smc,&smc->r.rmt_timer2,value,EV_TOKEN(EVENT_RMT,event)); +} + +/* + * SMT timer interface + * stop RMT timer 0 + */ +static void stop_rmt_timer0(struct s_smc *smc) +{ + if (smc->r.rmt_timer0.tm_active) + smt_timer_stop(smc,&smc->r.rmt_timer0) ; +} + +/* + * SMT timer interface + * stop RMT timer 1 + */ +static void stop_rmt_timer1(struct s_smc *smc) +{ + if (smc->r.rmt_timer1.tm_active) + smt_timer_stop(smc,&smc->r.rmt_timer1) ; +} + +/* + * SMT timer interface + * stop RMT timer 2 + */ +static void stop_rmt_timer2(struct s_smc *smc) +{ + if (smc->r.rmt_timer2.tm_active) + smt_timer_stop(smc,&smc->r.rmt_timer2) ; +} + -- cgit v1.2.3