Lines Matching +full:cts +full:- +full:rts +full:- +full:swap
1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2010-2011 EIA Electronics,
6 // Copyright (c) 2017-2019 Pengutronix,
7 // Marc Kleine-Budde <[email protected]>
8 // Copyright (c) 2017-2019 Pengutronix,
13 #include "j1939-priv.h"
64 /* CTS messages received when data transfer is in progress
105 /* EDPO number of packets is greater than CTS */
140 return "CTS messages received when data transfer is in progress"; in j1939_xtp_abort_to_str()
154 return "EDPO number of packets is greater than CTS"; in j1939_xtp_abort_to_str()
229 netdev_warn(priv->ndev, "Unknown abort code %i", abort); in j1939_xtp_abort_to_errno()
238 spin_lock_bh(&priv->active_session_list_lock); in j1939_session_list_lock()
243 spin_unlock_bh(&priv->active_session_list_lock); in j1939_session_list_unlock()
248 kref_get(&session->kref); in j1939_session_get()
254 if (!session->transmission) in __j1939_session_drop()
257 j1939_sock_pending_del(session->sk); in __j1939_session_drop()
258 sock_put(session->sk); in __j1939_session_drop()
265 if (session->transmission) { in j1939_session_destroy()
266 if (session->err) in j1939_session_destroy()
270 } else if (session->err) { in j1939_session_destroy()
274 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_session_destroy()
276 WARN_ON_ONCE(!list_empty(&session->sk_session_queue_entry)); in j1939_session_destroy()
277 WARN_ON_ONCE(!list_empty(&session->active_session_list_entry)); in j1939_session_destroy()
279 while ((skb = skb_dequeue(&session->skb_queue)) != NULL) { in j1939_session_destroy()
285 j1939_priv_put(session->priv); in j1939_session_destroy()
299 kref_put(&session->kref, __j1939_session_release); in j1939_session_put()
304 if (hrtimer_cancel(&session->txtimer)) in j1939_session_txtimer_cancel()
310 if (hrtimer_cancel(&session->rxtimer)) in j1939_session_rxtimer_cancel()
322 return (!skcb->addr.dst_name && (skcb->addr.da == 0xff)); in j1939_cb_is_broadcast()
332 if (skb_queue_len(&session->skb_queue) < 2) in j1939_session_skb_drop_old()
335 offset_start = session->pkt.tx_acked * 7; in j1939_session_skb_drop_old()
337 spin_lock_irqsave(&session->skb_queue.lock, flags); in j1939_session_skb_drop_old()
338 do_skb = skb_peek(&session->skb_queue); in j1939_session_skb_drop_old()
341 if ((do_skcb->offset + do_skb->len) < offset_start) { in j1939_session_skb_drop_old()
342 __skb_unlink(do_skb, &session->skb_queue); in j1939_session_skb_drop_old()
345 spin_unlock_irqrestore(&session->skb_queue.lock, flags); in j1939_session_skb_drop_old()
349 spin_unlock_irqrestore(&session->skb_queue.lock, flags); in j1939_session_skb_drop_old()
357 struct j1939_priv *priv = session->priv; in j1939_session_skb_queue()
361 if (j1939_address_is_unicast(skcb->addr.da) && in j1939_session_skb_queue()
362 priv->ents[skcb->addr.da].nusers) in j1939_session_skb_queue()
363 skcb->flags |= J1939_ECU_LOCAL_DST; in j1939_session_skb_queue()
365 skcb->flags |= J1939_ECU_LOCAL_SRC; in j1939_session_skb_queue()
368 skb_queue_tail(&session->skb_queue, skb); in j1939_session_skb_queue()
375 struct j1939_priv *priv = session->priv; in j1939_session_skb_get_by_offset()
381 spin_lock_irqsave(&session->skb_queue.lock, flags); in j1939_session_skb_get_by_offset()
382 skb_queue_walk(&session->skb_queue, do_skb) { in j1939_session_skb_get_by_offset()
385 if ((offset_start >= do_skcb->offset && in j1939_session_skb_get_by_offset()
386 offset_start < (do_skcb->offset + do_skb->len)) || in j1939_session_skb_get_by_offset()
387 (offset_start == 0 && do_skcb->offset == 0 && do_skb->len == 0)) { in j1939_session_skb_get_by_offset()
395 spin_unlock_irqrestore(&session->skb_queue.lock, flags); in j1939_session_skb_get_by_offset()
398 netdev_dbg(priv->ndev, "%s: 0x%p: no skb found for start: %i, queue size: %i\n", in j1939_session_skb_get_by_offset()
400 skb_queue_len(&session->skb_queue)); in j1939_session_skb_get_by_offset()
409 offset_start = session->pkt.dpo * 7; in j1939_session_skb_get()
418 return skcb->flags & J1939_ECU_LOCAL_DST; in j1939_tp_im_receiver()
424 return skcb->flags & J1939_ECU_LOCAL_SRC; in j1939_tp_im_transmitter()
428 static int j1939_tp_im_involved(const struct j1939_sk_buff_cb *skcb, bool swap) in j1939_tp_im_involved() argument
430 if (swap) in j1939_tp_im_involved()
438 return skcb->flags & (J1939_ECU_LOCAL_SRC | J1939_ECU_LOCAL_DST); in j1939_tp_im_involved_anydir()
441 /* extract pgn from flow-ctl message */
469 * reverse: swap cb's src & dst
477 if (se_addr->type != sk_addr->type) in j1939_session_match()
481 if (se_addr->src_name) { in j1939_session_match()
482 if (se_addr->src_name != sk_addr->dst_name) in j1939_session_match()
484 } else if (se_addr->sa != sk_addr->da) { in j1939_session_match()
488 if (se_addr->dst_name) { in j1939_session_match()
489 if (se_addr->dst_name != sk_addr->src_name) in j1939_session_match()
491 } else if (se_addr->da != sk_addr->sa) { in j1939_session_match()
495 if (se_addr->src_name) { in j1939_session_match()
496 if (se_addr->src_name != sk_addr->src_name) in j1939_session_match()
498 } else if (se_addr->sa != sk_addr->sa) { in j1939_session_match()
502 if (se_addr->dst_name) { in j1939_session_match()
503 if (se_addr->dst_name != sk_addr->dst_name) in j1939_session_match()
505 } else if (se_addr->da != sk_addr->da) { in j1939_session_match()
521 lockdep_assert_held(&priv->active_session_list_lock); in j1939_session_get_by_addr_locked()
525 if (j1939_session_match(&session->skcb.addr, addr, reverse) && in j1939_session_get_by_addr_locked()
526 session->transmission == transmitter) in j1939_session_get_by_addr_locked()
541 lockdep_assert_held(&priv->active_session_list_lock); in j1939_session_get_simple()
543 list_for_each_entry(session, &priv->active_session_list, in j1939_session_get_simple()
546 if (session->skcb.addr.type == J1939_SIMPLE && in j1939_session_get_simple()
547 session->tskey == skcb->tskey && session->sk == skb->sk) in j1939_session_get_simple()
564 &priv->active_session_list, in j1939_session_get_by_addr()
575 swap(skcb->addr.dst_name, skcb->addr.src_name); in j1939_skbcb_swap()
576 swap(skcb->addr.da, skcb->addr.sa); in j1939_skbcb_swap()
578 /* swap SRC and DST flags, leave other untouched */ in j1939_skbcb_swap()
579 if (skcb->flags & J1939_ECU_LOCAL_SRC) in j1939_skbcb_swap()
581 if (skcb->flags & J1939_ECU_LOCAL_DST) in j1939_skbcb_swap()
583 skcb->flags &= ~(J1939_ECU_LOCAL_SRC | J1939_ECU_LOCAL_DST); in j1939_skbcb_swap()
584 skcb->flags |= tmp; in j1939_skbcb_swap()
599 return ERR_PTR(-ENOMEM); in j1939_tp_tx_dat_new()
601 skb->dev = priv->ndev; in j1939_tp_tx_dat_new()
603 can_skb_prv(skb)->ifindex = priv->ndev->ifindex; in j1939_tp_tx_dat_new()
604 can_skb_prv(skb)->skbcnt = 0; in j1939_tp_tx_dat_new()
608 /* skb->cb must be large enough to hold a j1939_sk_buff_cb structure */ in j1939_tp_tx_dat_new()
609 BUILD_BUG_ON(sizeof(skb->cb) < sizeof(*re_skcb)); in j1939_tp_tx_dat_new()
611 memcpy(skb->cb, re_skcb, sizeof(*re_skcb)); in j1939_tp_tx_dat_new()
617 if (skcb->addr.type == J1939_ETP) in j1939_tp_tx_dat_new()
618 skcb->addr.pgn = J1939_ETP_PGN_CTL; in j1939_tp_tx_dat_new()
620 skcb->addr.pgn = J1939_TP_PGN_CTL; in j1939_tp_tx_dat_new()
622 if (skcb->addr.type == J1939_ETP) in j1939_tp_tx_dat_new()
623 skcb->addr.pgn = J1939_ETP_PGN_DAT; in j1939_tp_tx_dat_new()
625 skcb->addr.pgn = J1939_TP_PGN_DAT; in j1939_tp_tx_dat_new()
635 struct j1939_priv *priv = session->priv; in j1939_tp_tx_dat()
638 skb = j1939_tp_tx_dat_new(priv, &session->skcb, in j1939_tp_tx_dat()
645 memset(skb_put(skb, 8 - len), 0xff, 8 - len); in j1939_tp_tx_dat()
676 struct j1939_priv *priv = session->priv; in j1939_tp_tx_ctl()
678 return j1939_xtp_do_tx_ctl(priv, &session->skcb, in j1939_tp_tx_ctl()
680 session->skcb.addr.pgn, dat); in j1939_tp_tx_ctl()
703 hrtimer_start(&session->txtimer, ms_to_ktime(msec), in j1939_tp_schedule_txtimer()
712 hrtimer_start(&session->rxtimer, ms_to_ktime(msec), in j1939_tp_set_rxtimeout()
723 dat[1] = (session->total_message_size >> 0); in j1939_session_tx_rts()
724 dat[2] = (session->total_message_size >> 8); in j1939_session_tx_rts()
725 dat[3] = session->pkt.total; in j1939_session_tx_rts()
727 if (session->skcb.addr.type == J1939_ETP) { in j1939_session_tx_rts()
729 dat[1] = (session->total_message_size >> 0); in j1939_session_tx_rts()
730 dat[2] = (session->total_message_size >> 8); in j1939_session_tx_rts()
731 dat[3] = (session->total_message_size >> 16); in j1939_session_tx_rts()
732 dat[4] = (session->total_message_size >> 24); in j1939_session_tx_rts()
733 } else if (j1939_cb_is_broadcast(&session->skcb)) { in j1939_session_tx_rts()
735 /* fake cts for broadcast */ in j1939_session_tx_rts()
736 session->pkt.tx = 0; in j1939_session_tx_rts()
742 if (dat[0] == session->last_txcmd) in j1939_session_tx_rts()
750 session->last_txcmd = dat[0]; in j1939_session_tx_rts()
758 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_session_tx_rts()
772 session->pkt.dpo = session->pkt.tx_acked; in j1939_session_tx_dpo()
773 pkt = session->pkt.dpo; in j1939_session_tx_dpo()
774 dat[1] = session->pkt.last - session->pkt.tx_acked; in j1939_session_tx_dpo()
783 session->last_txcmd = dat[0]; in j1939_session_tx_dpo()
785 session->pkt.tx = session->pkt.tx_acked; in j1939_session_tx_dpo()
787 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_session_tx_dpo()
794 struct j1939_priv *priv = session->priv; in j1939_session_tx_dat()
803 se_skb = j1939_session_skb_get_by_offset(session, session->pkt.tx * 7); in j1939_session_tx_dat()
805 return -ENOBUFS; in j1939_session_tx_dat()
808 tpdat = se_skb->data; in j1939_session_tx_dat()
811 if (session->skcb.addr.type != J1939_ETP && in j1939_session_tx_dat()
812 j1939_cb_is_broadcast(&session->skcb)) in j1939_session_tx_dat()
813 pkt_end = session->pkt.total; in j1939_session_tx_dat()
815 pkt_end = session->pkt.last; in j1939_session_tx_dat()
817 while (session->pkt.tx < pkt_end) { in j1939_session_tx_dat()
818 dat[0] = session->pkt.tx - session->pkt.dpo + 1; in j1939_session_tx_dat()
819 offset = (session->pkt.tx * 7) - se_skcb->offset; in j1939_session_tx_dat()
820 len = se_skb->len - offset; in j1939_session_tx_dat()
824 if (offset + len > se_skb->len) { in j1939_session_tx_dat()
825 netdev_err_once(priv->ndev, in j1939_session_tx_dat()
827 __func__, session, se_skcb->offset, in j1939_session_tx_dat()
828 se_skb->len , session->pkt.tx); in j1939_session_tx_dat()
829 ret = -EOVERFLOW; in j1939_session_tx_dat()
834 ret = -ENOBUFS; in j1939_session_tx_dat()
842 if (ret != -ENOBUFS) in j1939_session_tx_dat()
843 netdev_alert(priv->ndev, in j1939_session_tx_dat()
849 session->last_txcmd = 0xff; in j1939_session_tx_dat()
851 session->pkt.tx++; in j1939_session_tx_dat()
852 pdelay = j1939_cb_is_broadcast(&session->skcb) ? 50 : in j1939_session_tx_dat()
855 if (session->pkt.tx < session->pkt.total && pdelay) { in j1939_session_tx_dat()
875 struct j1939_priv *priv = session->priv; in j1939_xtp_txnext_transmiter()
878 if (!j1939_tp_im_transmitter(&session->skcb)) { in j1939_xtp_txnext_transmiter()
879 netdev_alert(priv->ndev, "%s: 0x%p: called by not transmitter!\n", in j1939_xtp_txnext_transmiter()
881 return -EINVAL; in j1939_xtp_txnext_transmiter()
884 switch (session->last_cmd) { in j1939_xtp_txnext_transmiter()
890 if (session->last_txcmd != J1939_ETP_CMD_DPO) { in j1939_xtp_txnext_transmiter()
905 netdev_alert(priv->ndev, "%s: 0x%p: unexpected last_cmd: %x\n", in j1939_xtp_txnext_transmiter()
906 __func__, session, session->last_cmd); in j1939_xtp_txnext_transmiter()
914 struct j1939_priv *priv = session->priv; in j1939_session_tx_cts()
919 if (!j1939_sk_recv_match(priv, &session->skcb)) in j1939_session_tx_cts()
920 return -ENOENT; in j1939_session_tx_cts()
922 len = session->pkt.total - session->pkt.rx; in j1939_session_tx_cts()
923 len = min3(len, session->pkt.block, j1939_tp_block ?: 255); in j1939_session_tx_cts()
926 if (session->skcb.addr.type == J1939_ETP) { in j1939_session_tx_cts()
927 pkt = session->pkt.rx + 1; in j1939_session_tx_cts()
936 dat[2] = session->pkt.rx + 1; in j1939_session_tx_cts()
939 if (dat[0] == session->last_txcmd) in j1939_session_tx_cts()
948 /* only mark cts done when len is set */ in j1939_session_tx_cts()
949 session->last_txcmd = dat[0]; in j1939_session_tx_cts()
952 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_session_tx_cts()
959 struct j1939_priv *priv = session->priv; in j1939_session_tx_eoma()
963 if (!j1939_sk_recv_match(priv, &session->skcb)) in j1939_session_tx_eoma()
964 return -ENOENT; in j1939_session_tx_eoma()
968 if (session->skcb.addr.type == J1939_ETP) { in j1939_session_tx_eoma()
970 dat[1] = session->total_message_size >> 0; in j1939_session_tx_eoma()
971 dat[2] = session->total_message_size >> 8; in j1939_session_tx_eoma()
972 dat[3] = session->total_message_size >> 16; in j1939_session_tx_eoma()
973 dat[4] = session->total_message_size >> 24; in j1939_session_tx_eoma()
976 dat[1] = session->total_message_size; in j1939_session_tx_eoma()
977 dat[2] = session->total_message_size >> 8; in j1939_session_tx_eoma()
978 dat[3] = session->pkt.total; in j1939_session_tx_eoma()
981 if (dat[0] == session->last_txcmd) in j1939_session_tx_eoma()
989 session->last_txcmd = dat[0]; in j1939_session_tx_eoma()
994 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_session_tx_eoma()
1001 struct j1939_priv *priv = session->priv; in j1939_xtp_txnext_receiver()
1004 if (!j1939_tp_im_receiver(&session->skcb)) { in j1939_xtp_txnext_receiver()
1005 netdev_alert(priv->ndev, "%s: 0x%p: called by not receiver!\n", in j1939_xtp_txnext_receiver()
1007 return -EINVAL; in j1939_xtp_txnext_receiver()
1010 switch (session->last_cmd) { in j1939_xtp_txnext_receiver()
1020 if ((session->skcb.addr.type == J1939_TP && in j1939_xtp_txnext_receiver()
1021 j1939_cb_is_broadcast(&session->skcb))) in j1939_xtp_txnext_receiver()
1024 if (session->pkt.rx >= session->pkt.total) { in j1939_xtp_txnext_receiver()
1026 } else if (session->pkt.rx >= session->pkt.last) { in j1939_xtp_txnext_receiver()
1027 session->last_txcmd = 0; in j1939_xtp_txnext_receiver()
1032 netdev_alert(priv->ndev, "%s: 0x%p: unexpected last_cmd: %x\n", in j1939_xtp_txnext_receiver()
1033 __func__, session, session->last_cmd); in j1939_xtp_txnext_receiver()
1041 struct j1939_priv *priv = session->priv; in j1939_simple_txnext()
1051 ret = -ENOMEM; in j1939_simple_txnext()
1055 can_skb_set_owner(skb, se_skb->sk); in j1939_simple_txnext()
1079 lockdep_assert_held(&session->priv->active_session_list_lock); in j1939_session_deactivate_locked()
1081 if (session->state >= J1939_SESSION_ACTIVE && in j1939_session_deactivate_locked()
1082 session->state < J1939_SESSION_ACTIVE_MAX) { in j1939_session_deactivate_locked()
1085 list_del_init(&session->active_session_list_entry); in j1939_session_deactivate_locked()
1086 session->state = J1939_SESSION_DONE; in j1939_session_deactivate_locked()
1095 struct j1939_priv *priv = session->priv; in j1939_session_deactivate()
1115 struct j1939_priv *priv = session->priv; in __j1939_session_cancel()
1118 lockdep_assert_held(&session->priv->active_session_list_lock); in __j1939_session_cancel()
1120 session->err = j1939_xtp_abort_to_errno(priv, err); in __j1939_session_cancel()
1121 session->state = J1939_SESSION_WAITING_ABORT; in __j1939_session_cancel()
1123 if (!j1939_cb_is_broadcast(&session->skcb)) { in __j1939_session_cancel()
1124 j1939_xtp_tx_abort(priv, &session->skcb, in __j1939_session_cancel()
1125 !session->transmission, in __j1939_session_cancel()
1126 err, session->skcb.addr.pgn); in __j1939_session_cancel()
1129 if (session->sk) in __j1939_session_cancel()
1130 j1939_sk_send_loop_abort(session->sk, session->err); in __j1939_session_cancel()
1136 j1939_session_list_lock(session->priv); in j1939_session_cancel()
1138 if (session->state >= J1939_SESSION_ACTIVE && in j1939_session_cancel()
1139 session->state < J1939_SESSION_WAITING_ABORT) { in j1939_session_cancel()
1144 j1939_session_list_unlock(session->priv); in j1939_session_cancel()
1146 if (!session->sk) in j1939_session_cancel()
1154 struct j1939_priv *priv = session->priv; in j1939_tp_txtimer()
1157 if (session->skcb.addr.type == J1939_SIMPLE) { in j1939_tp_txtimer()
1160 if (session->transmission) in j1939_tp_txtimer()
1167 case -ENOBUFS: in j1939_tp_txtimer()
1169 if (session->tx_retry < J1939_XTP_TX_RETRY_LIMIT) { in j1939_tp_txtimer()
1170 session->tx_retry++; in j1939_tp_txtimer()
1174 netdev_alert(priv->ndev, "%s: 0x%p: tx retry count reached\n", in j1939_tp_txtimer()
1176 session->err = -ENETUNREACH; in j1939_tp_txtimer()
1181 case -ENETDOWN: in j1939_tp_txtimer()
1189 case -EOVERFLOW: in j1939_tp_txtimer()
1193 session->tx_retry = 0; in j1939_tp_txtimer()
1196 netdev_alert(priv->ndev, "%s: 0x%p: tx aborted with unknown reason: %i\n", in j1939_tp_txtimer()
1198 if (session->skcb.addr.type != J1939_SIMPLE) { in j1939_tp_txtimer()
1201 session->err = ret; in j1939_tp_txtimer()
1216 if (!session->transmission) { in j1939_session_completed()
1219 j1939_sk_recv(session->priv, se_skb); in j1939_session_completed()
1231 struct j1939_priv *priv = session->priv; in j1939_tp_rxtimer()
1233 if (session->state == J1939_SESSION_WAITING_ABORT) { in j1939_tp_rxtimer()
1234 netdev_alert(priv->ndev, "%s: 0x%p: abort rx timeout. Force session deactivation\n", in j1939_tp_rxtimer()
1239 } else if (session->skcb.addr.type == J1939_SIMPLE) { in j1939_tp_rxtimer()
1240 netdev_alert(priv->ndev, "%s: 0x%p: Timeout. Failed to send simple message.\n", in j1939_tp_rxtimer()
1246 session->err = -ETIME; in j1939_tp_rxtimer()
1249 j1939_session_list_lock(session->priv); in j1939_tp_rxtimer()
1250 if (session->state >= J1939_SESSION_ACTIVE && in j1939_tp_rxtimer()
1251 session->state < J1939_SESSION_ACTIVE_MAX) { in j1939_tp_rxtimer()
1252 netdev_alert(priv->ndev, "%s: 0x%p: rx timeout, send abort\n", in j1939_tp_rxtimer()
1255 hrtimer_start(&session->rxtimer, in j1939_tp_rxtimer()
1260 j1939_session_list_unlock(session->priv); in j1939_tp_rxtimer()
1262 if (!session->sk) in j1939_tp_rxtimer()
1275 pgn_t pgn = j1939_xtp_ctl_to_pgn(skb->data); in j1939_xtp_rx_cmd_bad_pgn()
1276 struct j1939_priv *priv = session->priv; in j1939_xtp_rx_cmd_bad_pgn()
1278 u8 cmd = skb->data[0]; in j1939_xtp_rx_cmd_bad_pgn()
1280 if (session->skcb.addr.pgn == pgn) in j1939_xtp_rx_cmd_bad_pgn()
1319 …netdev_warn(priv->ndev, "%s: 0x%p: CMD 0x%02x with PGN 0x%05x for running session with different P… in j1939_xtp_rx_cmd_bad_pgn()
1320 __func__, session, cmd, pgn, session->skcb.addr.pgn); in j1939_xtp_rx_cmd_bad_pgn()
1332 u8 abort = skb->data[1]; in j1939_xtp_rx_abort_one()
1334 session = j1939_session_get_by_addr(priv, &skcb->addr, reverse, in j1939_xtp_rx_abort_one()
1342 netdev_info(priv->ndev, "%s: 0x%p: 0x%05x: (%u) %s\n", __func__, in j1939_xtp_rx_abort_one()
1343 session, j1939_xtp_ctl_to_pgn(skb->data), abort, in j1939_xtp_rx_abort_one()
1347 session->err = j1939_xtp_abort_to_errno(priv, abort); in j1939_xtp_rx_abort_one()
1348 if (session->sk) in j1939_xtp_rx_abort_one()
1349 j1939_sk_send_loop_abort(session->sk, session->err); in j1939_xtp_rx_abort_one()
1377 dat = skb->data; in j1939_xtp_rx_eoma_one()
1379 if (skcb->addr.type == J1939_ETP) in j1939_xtp_rx_eoma_one()
1384 if (session->total_message_size != len) { in j1939_xtp_rx_eoma_one()
1385 netdev_warn_once(session->priv->ndev, in j1939_xtp_rx_eoma_one()
1387 __func__, session, session->total_message_size, in j1939_xtp_rx_eoma_one()
1391 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_xtp_rx_eoma_one()
1393 session->pkt.tx_acked = session->pkt.total; in j1939_xtp_rx_eoma_one()
1406 session = j1939_session_get_by_addr(priv, &skcb->addr, true, in j1939_xtp_rx_eoma()
1422 dat = skb->data; in j1939_xtp_rx_cts_one()
1427 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_xtp_rx_cts_one()
1429 if (session->last_cmd == dat[0]) { in j1939_xtp_rx_cts_one()
1434 if (session->skcb.addr.type == J1939_ETP) in j1939_xtp_rx_cts_one()
1441 else if (dat[1] > session->pkt.block /* 0xff for etp */) in j1939_xtp_rx_cts_one()
1444 /* set packet counters only when not CTS(0) */ in j1939_xtp_rx_cts_one()
1445 session->pkt.tx_acked = pkt - 1; in j1939_xtp_rx_cts_one()
1447 session->pkt.last = session->pkt.tx_acked + dat[1]; in j1939_xtp_rx_cts_one()
1448 if (session->pkt.last > session->pkt.total) in j1939_xtp_rx_cts_one()
1450 session->pkt.last = session->pkt.total; in j1939_xtp_rx_cts_one()
1452 session->pkt.tx = session->pkt.tx_acked; in j1939_xtp_rx_cts_one()
1454 session->last_cmd = dat[0]; in j1939_xtp_rx_cts_one()
1457 if (session->transmission) { in j1939_xtp_rx_cts_one()
1458 if (session->pkt.tx_acked) in j1939_xtp_rx_cts_one()
1465 /* CTS(0) */ in j1939_xtp_rx_cts_one()
1481 session = j1939_session_get_by_addr(priv, &skcb->addr, true, in j1939_xtp_rx_cts()
1499 INIT_LIST_HEAD(&session->active_session_list_entry); in j1939_session_new()
1500 INIT_LIST_HEAD(&session->sk_session_queue_entry); in j1939_session_new()
1501 kref_init(&session->kref); in j1939_session_new()
1504 session->priv = priv; in j1939_session_new()
1505 session->total_message_size = size; in j1939_session_new()
1506 session->state = J1939_SESSION_NEW; in j1939_session_new()
1508 skb_queue_head_init(&session->skb_queue); in j1939_session_new()
1509 skb_queue_tail(&session->skb_queue, skb_get(skb)); in j1939_session_new()
1512 memcpy(&session->skcb, skcb, sizeof(session->skcb)); in j1939_session_new()
1514 hrtimer_init(&session->txtimer, CLOCK_MONOTONIC, in j1939_session_new()
1516 session->txtimer.function = j1939_tp_txtimer; in j1939_session_new()
1517 hrtimer_init(&session->rxtimer, CLOCK_MONOTONIC, in j1939_session_new()
1519 session->rxtimer.function = j1939_tp_rxtimer; in j1939_session_new()
1521 netdev_dbg(priv->ndev, "%s: 0x%p: sa: %02x, da: %02x\n", in j1939_session_new()
1522 __func__, session, skcb->addr.sa, skcb->addr.da); in j1939_session_new()
1540 skb->dev = priv->ndev; in j1939_session_fresh_new()
1542 can_skb_prv(skb)->ifindex = priv->ndev->ifindex; in j1939_session_fresh_new()
1543 can_skb_prv(skb)->skbcnt = 0; in j1939_session_fresh_new()
1561 struct j1939_priv *priv = session->priv; in j1939_session_activate()
1566 if (session->skcb.addr.type != J1939_SIMPLE) in j1939_session_activate()
1568 &priv->active_session_list, in j1939_session_activate()
1569 &session->skcb.addr, false, in j1939_session_activate()
1570 session->transmission); in j1939_session_activate()
1573 ret = -EAGAIN; in j1939_session_activate()
1575 WARN_ON_ONCE(session->state != J1939_SESSION_NEW); in j1939_session_activate()
1576 list_add_tail(&session->active_session_list_entry, in j1939_session_activate()
1577 &priv->active_session_list); in j1939_session_activate()
1579 session->state = J1939_SESSION_ACTIVE; in j1939_session_activate()
1581 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", in j1939_session_activate()
1600 netdev_dbg(priv->ndev, "%s\n", __func__); in j1939_xtp_rx_rts_session_new()
1602 dat = skb->data; in j1939_xtp_rx_rts_session_new()
1613 else if (len > priv->tp_max_packet_size) in j1939_xtp_rx_rts_session_new()
1621 else if (len > priv->tp_max_packet_size) in j1939_xtp_rx_rts_session_new()
1640 session->pkt.total = (len + 6) / 7; in j1939_xtp_rx_rts_session_new()
1641 session->pkt.block = 0xff; in j1939_xtp_rx_rts_session_new()
1643 if (dat[3] != session->pkt.total) in j1939_xtp_rx_rts_session_new()
1644 netdev_alert(priv->ndev, "%s: 0x%p: strange total, %u != %u\n", in j1939_xtp_rx_rts_session_new()
1645 __func__, session, session->pkt.total, in j1939_xtp_rx_rts_session_new()
1647 session->pkt.total = dat[3]; in j1939_xtp_rx_rts_session_new()
1648 session->pkt.block = min(dat[3], dat[4]); in j1939_xtp_rx_rts_session_new()
1651 session->pkt.rx = 0; in j1939_xtp_rx_rts_session_new()
1652 session->pkt.tx = 0; in j1939_xtp_rx_rts_session_new()
1654 session->tskey = priv->rx_tskey++; in j1939_xtp_rx_rts_session_new()
1661 * - A time lapse occurred, and a new session was initiated in j1939_xtp_rx_rts_session_new()
1664 * out-scheduled by another task. in j1939_xtp_rx_rts_session_new()
1665 * - The bus is receiving numerous erroneous packets, either in j1939_xtp_rx_rts_session_new()
1668 …netdev_alert(priv->ndev, "%s: 0x%p: concurrent session with same addr (%02x %02x) is already activ… in j1939_xtp_rx_rts_session_new()
1681 struct j1939_priv *priv = session->priv; in j1939_xtp_rx_rts_session_active()
1683 if (!session->transmission) { in j1939_xtp_rx_rts_session_active()
1685 return -EBUSY; in j1939_xtp_rx_rts_session_active()
1687 /* RTS on active session */ in j1939_xtp_rx_rts_session_active()
1692 if (session->last_cmd != 0) { in j1939_xtp_rx_rts_session_active()
1693 /* we received a second rts on the same connection */ in j1939_xtp_rx_rts_session_active()
1694 netdev_alert(priv->ndev, "%s: 0x%p: connection exists (%02x %02x). last cmd: %x\n", in j1939_xtp_rx_rts_session_active()
1695 __func__, session, skcb->addr.sa, skcb->addr.da, in j1939_xtp_rx_rts_session_active()
1696 session->last_cmd); in j1939_xtp_rx_rts_session_active()
1700 if (session->transmission) in j1939_xtp_rx_rts_session_active()
1703 return -EBUSY; in j1939_xtp_rx_rts_session_active()
1706 if (session->skcb.addr.sa != skcb->addr.sa || in j1939_xtp_rx_rts_session_active()
1707 session->skcb.addr.da != skcb->addr.da) in j1939_xtp_rx_rts_session_active()
1708 …netdev_warn(priv->ndev, "%s: 0x%p: session->skcb.addr.sa=0x%02x skcb->addr.sa=0x%02x session->skcb… in j1939_xtp_rx_rts_session_active()
1710 session->skcb.addr.sa, skcb->addr.sa, in j1939_xtp_rx_rts_session_active()
1711 session->skcb.addr.da, skcb->addr.da); in j1939_xtp_rx_rts_session_active()
1716 session->skcb.addr.sa = skcb->addr.sa; in j1939_xtp_rx_rts_session_active()
1717 session->skcb.addr.da = skcb->addr.da; in j1939_xtp_rx_rts_session_active()
1719 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_xtp_rx_rts_session_active()
1729 u8 cmd = skb->data[0]; in j1939_xtp_rx_rts()
1731 session = j1939_session_get_by_addr(priv, &skcb->addr, false, in j1939_xtp_rx_rts()
1737 * we received our own RTS. A session has already been in j1939_xtp_rx_rts()
1747 * - user space closed socket was and the session was in j1939_xtp_rx_rts()
1749 * - session was aborted due to external abort message in j1939_xtp_rx_rts()
1756 netdev_info(priv->ndev, "%s: failed to create TP BAM session\n", in j1939_xtp_rx_rts()
1766 session->last_cmd = cmd; in j1939_xtp_rx_rts()
1769 if (!session->transmission) in j1939_xtp_rx_rts()
1772 if (!session->transmission) { in j1939_xtp_rx_rts()
1785 const u8 *dat = skb->data; in j1939_xtp_rx_dpo_one()
1790 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_xtp_rx_dpo_one()
1793 session->pkt.dpo = j1939_etp_ctl_to_packet(skb->data); in j1939_xtp_rx_dpo_one()
1794 session->last_cmd = dat[0]; in j1939_xtp_rx_dpo_one()
1797 if (!session->transmission) in j1939_xtp_rx_dpo_one()
1807 session = j1939_session_get_by_addr(priv, &skcb->addr, false, in j1939_xtp_rx_dpo()
1810 netdev_info(priv->ndev, in j1939_xtp_rx_dpo()
1823 struct j1939_priv *priv = session->priv; in j1939_xtp_rx_dat_one()
1836 dat = skb->data; in j1939_xtp_rx_dat_one()
1837 if (skb->len != 8) { in j1939_xtp_rx_dat_one()
1843 switch (session->last_cmd) { in j1939_xtp_rx_dat_one()
1847 if (skcb->addr.type == J1939_ETP) in j1939_xtp_rx_dat_one()
1853 if (skcb->addr.type != J1939_ETP) in j1939_xtp_rx_dat_one()
1857 netdev_info(priv->ndev, "%s: 0x%p: last %02x\n", __func__, in j1939_xtp_rx_dat_one()
1858 session, session->last_cmd); in j1939_xtp_rx_dat_one()
1862 packet = (dat[0] - 1 + session->pkt.dpo); in j1939_xtp_rx_dat_one()
1863 if (packet > session->pkt.total || in j1939_xtp_rx_dat_one()
1864 (session->pkt.rx + 1) > session->pkt.total) { in j1939_xtp_rx_dat_one()
1865 netdev_info(priv->ndev, "%s: 0x%p: should have been completed\n", in j1939_xtp_rx_dat_one()
1872 netdev_warn(priv->ndev, "%s: 0x%p: no skb found\n", __func__, in j1939_xtp_rx_dat_one()
1878 offset = packet * 7 - se_skcb->offset; in j1939_xtp_rx_dat_one()
1879 nbytes = se_skb->len - offset; in j1939_xtp_rx_dat_one()
1882 if (nbytes <= 0 || (nbytes + 1) > skb->len) { in j1939_xtp_rx_dat_one()
1883 netdev_info(priv->ndev, "%s: 0x%p: nbytes %i, len %i\n", in j1939_xtp_rx_dat_one()
1884 __func__, session, nbytes, skb->len); in j1939_xtp_rx_dat_one()
1888 tpdat = se_skb->data; in j1939_xtp_rx_dat_one()
1889 if (!session->transmission) { in j1939_xtp_rx_dat_one()
1896 netdev_err_once(priv->ndev, in j1939_xtp_rx_dat_one()
1897 "%s: 0x%p: Data of RX-looped back packet (%*ph) doesn't match TX data (%*ph)!\n", in j1939_xtp_rx_dat_one()
1903 if (packet == session->pkt.rx) in j1939_xtp_rx_dat_one()
1904 session->pkt.rx++; in j1939_xtp_rx_dat_one()
1906 if (se_skcb->addr.type != J1939_ETP && in j1939_xtp_rx_dat_one()
1907 j1939_cb_is_broadcast(&session->skcb)) { in j1939_xtp_rx_dat_one()
1908 if (session->pkt.rx >= session->pkt.total) in j1939_xtp_rx_dat_one()
1914 if (session->pkt.rx >= session->pkt.last) in j1939_xtp_rx_dat_one()
1922 if (!session->transmission) in j1939_xtp_rx_dat_one()
1926 if (!session->transmission) in j1939_xtp_rx_dat_one()
1931 session->last_cmd = 0xff; in j1939_xtp_rx_dat_one()
1952 session = j1939_session_get_by_addr(priv, &skcb->addr, false, in j1939_xtp_rx_dat()
1955 netdev_info(priv->ndev, "%s: no tx connection found\n", in j1939_xtp_rx_dat()
1962 session = j1939_session_get_by_addr(priv, &skcb->addr, false, in j1939_xtp_rx_dat()
1965 netdev_info(priv->ndev, "%s: no rx connection found\n", in j1939_xtp_rx_dat()
1972 session = j1939_session_get_by_addr(priv, &skcb->addr, false, in j1939_xtp_rx_dat()
1987 if (skcb->addr.pgn == J1939_TP_PGN_DAT || in j1939_tp_send()
1988 skcb->addr.pgn == J1939_TP_PGN_CTL || in j1939_tp_send()
1989 skcb->addr.pgn == J1939_ETP_PGN_DAT || in j1939_tp_send()
1990 skcb->addr.pgn == J1939_ETP_PGN_CTL) in j1939_tp_send()
1992 return ERR_PTR(-EDOM); in j1939_tp_send()
1994 if (size > priv->tp_max_packet_size) in j1939_tp_send()
1995 return ERR_PTR(-EMSGSIZE); in j1939_tp_send()
1998 skcb->addr.type = J1939_SIMPLE; in j1939_tp_send()
2000 skcb->addr.type = J1939_ETP; in j1939_tp_send()
2002 skcb->addr.type = J1939_TP; in j1939_tp_send()
2004 if (skcb->addr.type == J1939_ETP && in j1939_tp_send()
2006 return ERR_PTR(-EDESTADDRREQ); in j1939_tp_send()
2014 if (j1939_address_is_unicast(skcb->addr.da) && in j1939_tp_send()
2015 priv->ents[skcb->addr.da].nusers) in j1939_tp_send()
2016 skcb->flags |= J1939_ECU_LOCAL_DST; in j1939_tp_send()
2019 skcb->flags |= J1939_ECU_LOCAL_SRC; in j1939_tp_send()
2024 return ERR_PTR(-ENOMEM); in j1939_tp_send()
2027 sock_hold(skb->sk); in j1939_tp_send()
2028 session->sk = skb->sk; in j1939_tp_send()
2029 session->transmission = true; in j1939_tp_send()
2030 session->pkt.total = (size + 6) / 7; in j1939_tp_send()
2031 session->pkt.block = skcb->addr.type == J1939_ETP ? 255 : in j1939_tp_send()
2032 min(j1939_tp_block ?: 255, session->pkt.total); in j1939_tp_send()
2034 if (j1939_cb_is_broadcast(&session->skcb)) in j1939_tp_send()
2035 /* set the end-packet for broadcast */ in j1939_tp_send()
2036 session->pkt.last = session->pkt.total; in j1939_tp_send()
2038 skcb->tskey = atomic_inc_return(&session->sk->sk_tskey) - 1; in j1939_tp_send()
2039 session->tskey = skcb->tskey; in j1939_tp_send()
2048 u8 cmd = skb->data[0]; in j1939_tp_cmd_recv()
2056 netdev_err_once(priv->ndev, "%s: BAM to unicast (%02x), ignoring!\n", in j1939_tp_cmd_recv()
2057 __func__, skcb->addr.sa); in j1939_tp_cmd_recv()
2062 if (skcb->addr.type != extd) in j1939_tp_cmd_recv()
2066 netdev_alert(priv->ndev, "%s: rts without destination (%02x)\n", in j1939_tp_cmd_recv()
2067 __func__, skcb->addr.sa); in j1939_tp_cmd_recv()
2083 if (skcb->addr.type != extd) in j1939_tp_cmd_recv()
2095 if (skcb->addr.type != J1939_ETP) in j1939_tp_cmd_recv()
2110 if (skcb->addr.type != extd) in j1939_tp_cmd_recv()
2123 netdev_err_once(priv->ndev, "%s: abort to broadcast (%02x), ignoring!\n", in j1939_tp_cmd_recv()
2124 __func__, skcb->addr.sa); in j1939_tp_cmd_recv()
2147 switch (skcb->addr.pgn) { in j1939_tp_recv()
2149 skcb->addr.type = J1939_ETP; in j1939_tp_recv()
2156 skcb->addr.type = J1939_ETP; in j1939_tp_recv()
2159 if (skb->len < 8) in j1939_tp_recv()
2174 if (!skb->sk) in j1939_simple_recv()
2177 if (skb->sk->sk_family != AF_CAN || in j1939_simple_recv()
2178 skb->sk->sk_protocol != CAN_J1939) in j1939_simple_recv()
2185 netdev_warn(priv->ndev, in j1939_simple_recv()
2200 netdev_dbg(priv->ndev, "%s, sk: %p\n", __func__, sk); in j1939_cancel_active_session()
2203 &priv->active_session_list, in j1939_cancel_active_session()
2205 if (!sk || sk == session->sk) { in j1939_cancel_active_session()
2206 if (hrtimer_try_to_cancel(&session->txtimer) == 1) in j1939_cancel_active_session()
2208 if (hrtimer_try_to_cancel(&session->rxtimer) == 1) in j1939_cancel_active_session()
2211 session->err = ESHUTDOWN; in j1939_cancel_active_session()
2221 spin_lock_init(&priv->active_session_list_lock); in j1939_tp_init()
2222 INIT_LIST_HEAD(&priv->active_session_list); in j1939_tp_init()
2223 priv->tp_max_packet_size = J1939_MAX_ETP_PACKET_SIZE; in j1939_tp_init()