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 <kernel@pengutronix.de>
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()
394 spin_unlock_irqrestore(&session->skb_queue.lock, flags); in j1939_session_skb_get_by_offset()
397 netdev_dbg(priv->ndev, "%s: 0x%p: no skb found for start: %i, queue size: %i\n", in j1939_session_skb_get_by_offset()
399 skb_queue_len(&session->skb_queue)); in j1939_session_skb_get_by_offset()
408 offset_start = session->pkt.dpo * 7; in j1939_session_skb_get()
417 return skcb->flags & J1939_ECU_LOCAL_DST; in j1939_tp_im_receiver()
423 return skcb->flags & J1939_ECU_LOCAL_SRC; in j1939_tp_im_transmitter()
427 static int j1939_tp_im_involved(const struct j1939_sk_buff_cb *skcb, bool swap) in j1939_tp_im_involved() argument
429 if (swap) in j1939_tp_im_involved()
437 return skcb->flags & (J1939_ECU_LOCAL_SRC | J1939_ECU_LOCAL_DST); in j1939_tp_im_involved_anydir()
440 /* extract pgn from flow-ctl message */
468 * reverse: swap cb's src & dst
476 if (se_addr->type != sk_addr->type) in j1939_session_match()
480 if (se_addr->src_name) { in j1939_session_match()
481 if (se_addr->src_name != sk_addr->dst_name) in j1939_session_match()
483 } else if (se_addr->sa != sk_addr->da) { in j1939_session_match()
487 if (se_addr->dst_name) { in j1939_session_match()
488 if (se_addr->dst_name != sk_addr->src_name) in j1939_session_match()
490 } else if (se_addr->da != sk_addr->sa) { in j1939_session_match()
494 if (se_addr->src_name) { in j1939_session_match()
495 if (se_addr->src_name != sk_addr->src_name) in j1939_session_match()
497 } else if (se_addr->sa != sk_addr->sa) { in j1939_session_match()
501 if (se_addr->dst_name) { in j1939_session_match()
502 if (se_addr->dst_name != sk_addr->dst_name) in j1939_session_match()
504 } else if (se_addr->da != sk_addr->da) { in j1939_session_match()
520 lockdep_assert_held(&priv->active_session_list_lock); in j1939_session_get_by_addr_locked()
524 if (j1939_session_match(&session->skcb.addr, addr, reverse) && in j1939_session_get_by_addr_locked()
525 session->transmission == transmitter) in j1939_session_get_by_addr_locked()
540 lockdep_assert_held(&priv->active_session_list_lock); in j1939_session_get_simple()
542 list_for_each_entry(session, &priv->active_session_list, in j1939_session_get_simple()
545 if (session->skcb.addr.type == J1939_SIMPLE && in j1939_session_get_simple()
546 session->tskey == skcb->tskey && session->sk == skb->sk) in j1939_session_get_simple()
563 &priv->active_session_list, in j1939_session_get_by_addr()
574 swap(skcb->addr.dst_name, skcb->addr.src_name); in j1939_skbcb_swap()
575 swap(skcb->addr.da, skcb->addr.sa); in j1939_skbcb_swap()
577 /* swap SRC and DST flags, leave other untouched */ in j1939_skbcb_swap()
578 if (skcb->flags & J1939_ECU_LOCAL_SRC) in j1939_skbcb_swap()
580 if (skcb->flags & J1939_ECU_LOCAL_DST) in j1939_skbcb_swap()
582 skcb->flags &= ~(J1939_ECU_LOCAL_SRC | J1939_ECU_LOCAL_DST); in j1939_skbcb_swap()
583 skcb->flags |= tmp; in j1939_skbcb_swap()
598 return ERR_PTR(-ENOMEM); in j1939_tp_tx_dat_new()
600 skb->dev = priv->ndev; in j1939_tp_tx_dat_new()
602 can_skb_prv(skb)->ifindex = priv->ndev->ifindex; in j1939_tp_tx_dat_new()
603 can_skb_prv(skb)->skbcnt = 0; in j1939_tp_tx_dat_new()
607 /* skb->cb must be large enough to hold a j1939_sk_buff_cb structure */ in j1939_tp_tx_dat_new()
608 BUILD_BUG_ON(sizeof(skb->cb) < sizeof(*re_skcb)); in j1939_tp_tx_dat_new()
610 memcpy(skb->cb, re_skcb, sizeof(*re_skcb)); in j1939_tp_tx_dat_new()
616 if (skcb->addr.type == J1939_ETP) in j1939_tp_tx_dat_new()
617 skcb->addr.pgn = J1939_ETP_PGN_CTL; in j1939_tp_tx_dat_new()
619 skcb->addr.pgn = J1939_TP_PGN_CTL; in j1939_tp_tx_dat_new()
621 if (skcb->addr.type == J1939_ETP) in j1939_tp_tx_dat_new()
622 skcb->addr.pgn = J1939_ETP_PGN_DAT; in j1939_tp_tx_dat_new()
624 skcb->addr.pgn = J1939_TP_PGN_DAT; in j1939_tp_tx_dat_new()
634 struct j1939_priv *priv = session->priv; in j1939_tp_tx_dat()
637 skb = j1939_tp_tx_dat_new(priv, &session->skcb, in j1939_tp_tx_dat()
644 memset(skb_put(skb, 8 - len), 0xff, 8 - len); in j1939_tp_tx_dat()
675 struct j1939_priv *priv = session->priv; in j1939_tp_tx_ctl()
677 return j1939_xtp_do_tx_ctl(priv, &session->skcb, in j1939_tp_tx_ctl()
679 session->skcb.addr.pgn, dat); in j1939_tp_tx_ctl()
702 hrtimer_start(&session->txtimer, ms_to_ktime(msec), in j1939_tp_schedule_txtimer()
711 hrtimer_start(&session->rxtimer, ms_to_ktime(msec), in j1939_tp_set_rxtimeout()
722 dat[1] = (session->total_message_size >> 0); in j1939_session_tx_rts()
723 dat[2] = (session->total_message_size >> 8); in j1939_session_tx_rts()
724 dat[3] = session->pkt.total; in j1939_session_tx_rts()
726 if (session->skcb.addr.type == J1939_ETP) { in j1939_session_tx_rts()
728 dat[1] = (session->total_message_size >> 0); in j1939_session_tx_rts()
729 dat[2] = (session->total_message_size >> 8); in j1939_session_tx_rts()
730 dat[3] = (session->total_message_size >> 16); in j1939_session_tx_rts()
731 dat[4] = (session->total_message_size >> 24); in j1939_session_tx_rts()
732 } else if (j1939_cb_is_broadcast(&session->skcb)) { in j1939_session_tx_rts()
734 /* fake cts for broadcast */ in j1939_session_tx_rts()
735 session->pkt.tx = 0; in j1939_session_tx_rts()
741 if (dat[0] == session->last_txcmd) in j1939_session_tx_rts()
749 session->last_txcmd = dat[0]; in j1939_session_tx_rts()
757 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_session_tx_rts()
771 session->pkt.dpo = session->pkt.tx_acked; in j1939_session_tx_dpo()
772 pkt = session->pkt.dpo; in j1939_session_tx_dpo()
773 dat[1] = session->pkt.last - session->pkt.tx_acked; in j1939_session_tx_dpo()
782 session->last_txcmd = dat[0]; in j1939_session_tx_dpo()
784 session->pkt.tx = session->pkt.tx_acked; in j1939_session_tx_dpo()
786 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_session_tx_dpo()
793 struct j1939_priv *priv = session->priv; in j1939_session_tx_dat()
802 se_skb = j1939_session_skb_get_by_offset(session, session->pkt.tx * 7); in j1939_session_tx_dat()
804 return -ENOBUFS; in j1939_session_tx_dat()
807 tpdat = se_skb->data; in j1939_session_tx_dat()
810 if (session->skcb.addr.type != J1939_ETP && in j1939_session_tx_dat()
811 j1939_cb_is_broadcast(&session->skcb)) in j1939_session_tx_dat()
812 pkt_end = session->pkt.total; in j1939_session_tx_dat()
814 pkt_end = session->pkt.last; in j1939_session_tx_dat()
816 while (session->pkt.tx < pkt_end) { in j1939_session_tx_dat()
817 dat[0] = session->pkt.tx - session->pkt.dpo + 1; in j1939_session_tx_dat()
818 offset = (session->pkt.tx * 7) - se_skcb->offset; in j1939_session_tx_dat()
819 len = se_skb->len - offset; in j1939_session_tx_dat()
823 if (offset + len > se_skb->len) { in j1939_session_tx_dat()
824 netdev_err_once(priv->ndev, in j1939_session_tx_dat()
826 __func__, session, se_skcb->offset, in j1939_session_tx_dat()
827 se_skb->len , session->pkt.tx); in j1939_session_tx_dat()
828 ret = -EOVERFLOW; in j1939_session_tx_dat()
833 ret = -ENOBUFS; in j1939_session_tx_dat()
841 if (ret != -ENOBUFS) in j1939_session_tx_dat()
842 netdev_alert(priv->ndev, in j1939_session_tx_dat()
848 session->last_txcmd = 0xff; in j1939_session_tx_dat()
850 session->pkt.tx++; in j1939_session_tx_dat()
851 pdelay = j1939_cb_is_broadcast(&session->skcb) ? 50 : in j1939_session_tx_dat()
854 if (session->pkt.tx < session->pkt.total && pdelay) { in j1939_session_tx_dat()
874 struct j1939_priv *priv = session->priv; in j1939_xtp_txnext_transmiter()
877 if (!j1939_tp_im_transmitter(&session->skcb)) { in j1939_xtp_txnext_transmiter()
878 netdev_alert(priv->ndev, "%s: 0x%p: called by not transmitter!\n", in j1939_xtp_txnext_transmiter()
880 return -EINVAL; in j1939_xtp_txnext_transmiter()
883 switch (session->last_cmd) { in j1939_xtp_txnext_transmiter()
889 if (session->last_txcmd != J1939_ETP_CMD_DPO) { in j1939_xtp_txnext_transmiter()
904 netdev_alert(priv->ndev, "%s: 0x%p: unexpected last_cmd: %x\n", in j1939_xtp_txnext_transmiter()
905 __func__, session, session->last_cmd); in j1939_xtp_txnext_transmiter()
913 struct j1939_priv *priv = session->priv; in j1939_session_tx_cts()
918 if (!j1939_sk_recv_match(priv, &session->skcb)) in j1939_session_tx_cts()
919 return -ENOENT; in j1939_session_tx_cts()
921 len = session->pkt.total - session->pkt.rx; in j1939_session_tx_cts()
922 len = min3(len, session->pkt.block, j1939_tp_block ?: 255); in j1939_session_tx_cts()
925 if (session->skcb.addr.type == J1939_ETP) { in j1939_session_tx_cts()
926 pkt = session->pkt.rx + 1; in j1939_session_tx_cts()
935 dat[2] = session->pkt.rx + 1; in j1939_session_tx_cts()
938 if (dat[0] == session->last_txcmd) in j1939_session_tx_cts()
947 /* only mark cts done when len is set */ in j1939_session_tx_cts()
948 session->last_txcmd = dat[0]; in j1939_session_tx_cts()
951 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_session_tx_cts()
958 struct j1939_priv *priv = session->priv; in j1939_session_tx_eoma()
962 if (!j1939_sk_recv_match(priv, &session->skcb)) in j1939_session_tx_eoma()
963 return -ENOENT; in j1939_session_tx_eoma()
967 if (session->skcb.addr.type == J1939_ETP) { in j1939_session_tx_eoma()
969 dat[1] = session->total_message_size >> 0; in j1939_session_tx_eoma()
970 dat[2] = session->total_message_size >> 8; in j1939_session_tx_eoma()
971 dat[3] = session->total_message_size >> 16; in j1939_session_tx_eoma()
972 dat[4] = session->total_message_size >> 24; in j1939_session_tx_eoma()
975 dat[1] = session->total_message_size; in j1939_session_tx_eoma()
976 dat[2] = session->total_message_size >> 8; in j1939_session_tx_eoma()
977 dat[3] = session->pkt.total; in j1939_session_tx_eoma()
980 if (dat[0] == session->last_txcmd) in j1939_session_tx_eoma()
988 session->last_txcmd = dat[0]; in j1939_session_tx_eoma()
993 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_session_tx_eoma()
1000 struct j1939_priv *priv = session->priv; in j1939_xtp_txnext_receiver()
1003 if (!j1939_tp_im_receiver(&session->skcb)) { in j1939_xtp_txnext_receiver()
1004 netdev_alert(priv->ndev, "%s: 0x%p: called by not receiver!\n", in j1939_xtp_txnext_receiver()
1006 return -EINVAL; in j1939_xtp_txnext_receiver()
1009 switch (session->last_cmd) { in j1939_xtp_txnext_receiver()
1019 if ((session->skcb.addr.type == J1939_TP && in j1939_xtp_txnext_receiver()
1020 j1939_cb_is_broadcast(&session->skcb))) in j1939_xtp_txnext_receiver()
1023 if (session->pkt.rx >= session->pkt.total) { in j1939_xtp_txnext_receiver()
1025 } else if (session->pkt.rx >= session->pkt.last) { in j1939_xtp_txnext_receiver()
1026 session->last_txcmd = 0; in j1939_xtp_txnext_receiver()
1031 netdev_alert(priv->ndev, "%s: 0x%p: unexpected last_cmd: %x\n", in j1939_xtp_txnext_receiver()
1032 __func__, session, session->last_cmd); in j1939_xtp_txnext_receiver()
1040 struct j1939_priv *priv = session->priv; in j1939_simple_txnext()
1050 ret = -ENOMEM; in j1939_simple_txnext()
1054 can_skb_set_owner(skb, se_skb->sk); in j1939_simple_txnext()
1078 lockdep_assert_held(&session->priv->active_session_list_lock); in j1939_session_deactivate_locked()
1080 if (session->state >= J1939_SESSION_ACTIVE && in j1939_session_deactivate_locked()
1081 session->state < J1939_SESSION_ACTIVE_MAX) { in j1939_session_deactivate_locked()
1084 list_del_init(&session->active_session_list_entry); in j1939_session_deactivate_locked()
1085 session->state = J1939_SESSION_DONE; in j1939_session_deactivate_locked()
1094 struct j1939_priv *priv = session->priv; in j1939_session_deactivate()
1114 struct j1939_priv *priv = session->priv; in __j1939_session_cancel()
1117 lockdep_assert_held(&session->priv->active_session_list_lock); in __j1939_session_cancel()
1119 session->err = j1939_xtp_abort_to_errno(priv, err); in __j1939_session_cancel()
1120 session->state = J1939_SESSION_WAITING_ABORT; in __j1939_session_cancel()
1122 if (!j1939_cb_is_broadcast(&session->skcb)) { in __j1939_session_cancel()
1123 j1939_xtp_tx_abort(priv, &session->skcb, in __j1939_session_cancel()
1124 !session->transmission, in __j1939_session_cancel()
1125 err, session->skcb.addr.pgn); in __j1939_session_cancel()
1128 if (session->sk) in __j1939_session_cancel()
1129 j1939_sk_send_loop_abort(session->sk, session->err); in __j1939_session_cancel()
1135 j1939_session_list_lock(session->priv); in j1939_session_cancel()
1137 if (session->state >= J1939_SESSION_ACTIVE && in j1939_session_cancel()
1138 session->state < J1939_SESSION_WAITING_ABORT) { in j1939_session_cancel()
1143 j1939_session_list_unlock(session->priv); in j1939_session_cancel()
1145 if (!session->sk) in j1939_session_cancel()
1153 struct j1939_priv *priv = session->priv; in j1939_tp_txtimer()
1156 if (session->skcb.addr.type == J1939_SIMPLE) { in j1939_tp_txtimer()
1159 if (session->transmission) in j1939_tp_txtimer()
1166 case -ENOBUFS: in j1939_tp_txtimer()
1168 if (session->tx_retry < J1939_XTP_TX_RETRY_LIMIT) { in j1939_tp_txtimer()
1169 session->tx_retry++; in j1939_tp_txtimer()
1173 netdev_alert(priv->ndev, "%s: 0x%p: tx retry count reached\n", in j1939_tp_txtimer()
1175 session->err = -ENETUNREACH; in j1939_tp_txtimer()
1180 case -ENETDOWN: in j1939_tp_txtimer()
1188 case -EOVERFLOW: in j1939_tp_txtimer()
1192 session->tx_retry = 0; in j1939_tp_txtimer()
1195 netdev_alert(priv->ndev, "%s: 0x%p: tx aborted with unknown reason: %i\n", in j1939_tp_txtimer()
1197 if (session->skcb.addr.type != J1939_SIMPLE) { in j1939_tp_txtimer()
1200 session->err = ret; in j1939_tp_txtimer()
1215 if (!session->transmission) { in j1939_session_completed()
1218 j1939_sk_recv(session->priv, se_skb); in j1939_session_completed()
1230 struct j1939_priv *priv = session->priv; in j1939_tp_rxtimer()
1232 if (session->state == J1939_SESSION_WAITING_ABORT) { in j1939_tp_rxtimer()
1233 netdev_alert(priv->ndev, "%s: 0x%p: abort rx timeout. Force session deactivation\n", in j1939_tp_rxtimer()
1238 } else if (session->skcb.addr.type == J1939_SIMPLE) { in j1939_tp_rxtimer()
1239 netdev_alert(priv->ndev, "%s: 0x%p: Timeout. Failed to send simple message.\n", in j1939_tp_rxtimer()
1245 session->err = -ETIME; in j1939_tp_rxtimer()
1248 j1939_session_list_lock(session->priv); in j1939_tp_rxtimer()
1249 if (session->state >= J1939_SESSION_ACTIVE && in j1939_tp_rxtimer()
1250 session->state < J1939_SESSION_ACTIVE_MAX) { in j1939_tp_rxtimer()
1251 netdev_alert(priv->ndev, "%s: 0x%p: rx timeout, send abort\n", in j1939_tp_rxtimer()
1254 hrtimer_start(&session->rxtimer, in j1939_tp_rxtimer()
1259 j1939_session_list_unlock(session->priv); in j1939_tp_rxtimer()
1261 if (!session->sk) in j1939_tp_rxtimer()
1274 pgn_t pgn = j1939_xtp_ctl_to_pgn(skb->data); in j1939_xtp_rx_cmd_bad_pgn()
1275 struct j1939_priv *priv = session->priv; in j1939_xtp_rx_cmd_bad_pgn()
1277 u8 cmd = skb->data[0]; in j1939_xtp_rx_cmd_bad_pgn()
1279 if (session->skcb.addr.pgn == pgn) in j1939_xtp_rx_cmd_bad_pgn()
1318 …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()
1319 __func__, session, cmd, pgn, session->skcb.addr.pgn); in j1939_xtp_rx_cmd_bad_pgn()
1331 u8 abort = skb->data[1]; in j1939_xtp_rx_abort_one()
1333 session = j1939_session_get_by_addr(priv, &skcb->addr, reverse, in j1939_xtp_rx_abort_one()
1341 netdev_info(priv->ndev, "%s: 0x%p: 0x%05x: (%u) %s\n", __func__, in j1939_xtp_rx_abort_one()
1342 session, j1939_xtp_ctl_to_pgn(skb->data), abort, in j1939_xtp_rx_abort_one()
1346 session->err = j1939_xtp_abort_to_errno(priv, abort); in j1939_xtp_rx_abort_one()
1347 if (session->sk) in j1939_xtp_rx_abort_one()
1348 j1939_sk_send_loop_abort(session->sk, session->err); in j1939_xtp_rx_abort_one()
1376 dat = skb->data; in j1939_xtp_rx_eoma_one()
1378 if (skcb->addr.type == J1939_ETP) in j1939_xtp_rx_eoma_one()
1383 if (session->total_message_size != len) { in j1939_xtp_rx_eoma_one()
1384 netdev_warn_once(session->priv->ndev, in j1939_xtp_rx_eoma_one()
1386 __func__, session, session->total_message_size, in j1939_xtp_rx_eoma_one()
1390 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_xtp_rx_eoma_one()
1392 session->pkt.tx_acked = session->pkt.total; in j1939_xtp_rx_eoma_one()
1405 session = j1939_session_get_by_addr(priv, &skcb->addr, true, in j1939_xtp_rx_eoma()
1421 dat = skb->data; in j1939_xtp_rx_cts_one()
1426 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_xtp_rx_cts_one()
1428 if (session->last_cmd == dat[0]) { in j1939_xtp_rx_cts_one()
1433 if (session->skcb.addr.type == J1939_ETP) in j1939_xtp_rx_cts_one()
1440 else if (dat[1] > session->pkt.block /* 0xff for etp */) in j1939_xtp_rx_cts_one()
1443 /* set packet counters only when not CTS(0) */ in j1939_xtp_rx_cts_one()
1444 session->pkt.tx_acked = pkt - 1; in j1939_xtp_rx_cts_one()
1446 session->pkt.last = session->pkt.tx_acked + dat[1]; in j1939_xtp_rx_cts_one()
1447 if (session->pkt.last > session->pkt.total) in j1939_xtp_rx_cts_one()
1449 session->pkt.last = session->pkt.total; in j1939_xtp_rx_cts_one()
1451 session->pkt.tx = session->pkt.tx_acked; in j1939_xtp_rx_cts_one()
1453 session->last_cmd = dat[0]; in j1939_xtp_rx_cts_one()
1456 if (session->transmission) { in j1939_xtp_rx_cts_one()
1457 if (session->pkt.tx_acked) in j1939_xtp_rx_cts_one()
1464 /* CTS(0) */ in j1939_xtp_rx_cts_one()
1480 session = j1939_session_get_by_addr(priv, &skcb->addr, true, in j1939_xtp_rx_cts()
1498 INIT_LIST_HEAD(&session->active_session_list_entry); in j1939_session_new()
1499 INIT_LIST_HEAD(&session->sk_session_queue_entry); in j1939_session_new()
1500 kref_init(&session->kref); in j1939_session_new()
1503 session->priv = priv; in j1939_session_new()
1504 session->total_message_size = size; in j1939_session_new()
1505 session->state = J1939_SESSION_NEW; in j1939_session_new()
1507 skb_queue_head_init(&session->skb_queue); in j1939_session_new()
1508 skb_queue_tail(&session->skb_queue, skb_get(skb)); in j1939_session_new()
1511 memcpy(&session->skcb, skcb, sizeof(session->skcb)); in j1939_session_new()
1513 hrtimer_init(&session->txtimer, CLOCK_MONOTONIC, in j1939_session_new()
1515 session->txtimer.function = j1939_tp_txtimer; in j1939_session_new()
1516 hrtimer_init(&session->rxtimer, CLOCK_MONOTONIC, in j1939_session_new()
1518 session->rxtimer.function = j1939_tp_rxtimer; in j1939_session_new()
1520 netdev_dbg(priv->ndev, "%s: 0x%p: sa: %02x, da: %02x\n", in j1939_session_new()
1521 __func__, session, skcb->addr.sa, skcb->addr.da); in j1939_session_new()
1539 skb->dev = priv->ndev; in j1939_session_fresh_new()
1541 can_skb_prv(skb)->ifindex = priv->ndev->ifindex; in j1939_session_fresh_new()
1542 can_skb_prv(skb)->skbcnt = 0; in j1939_session_fresh_new()
1560 struct j1939_priv *priv = session->priv; in j1939_session_activate()
1565 if (session->skcb.addr.type != J1939_SIMPLE) in j1939_session_activate()
1567 &priv->active_session_list, in j1939_session_activate()
1568 &session->skcb.addr, false, in j1939_session_activate()
1569 session->transmission); in j1939_session_activate()
1572 ret = -EAGAIN; in j1939_session_activate()
1574 WARN_ON_ONCE(session->state != J1939_SESSION_NEW); in j1939_session_activate()
1575 list_add_tail(&session->active_session_list_entry, in j1939_session_activate()
1576 &priv->active_session_list); in j1939_session_activate()
1578 session->state = J1939_SESSION_ACTIVE; in j1939_session_activate()
1580 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", in j1939_session_activate()
1599 netdev_dbg(priv->ndev, "%s\n", __func__); in j1939_xtp_rx_rts_session_new()
1601 dat = skb->data; in j1939_xtp_rx_rts_session_new()
1612 else if (len > priv->tp_max_packet_size) in j1939_xtp_rx_rts_session_new()
1620 else if (len > priv->tp_max_packet_size) in j1939_xtp_rx_rts_session_new()
1639 session->pkt.total = (len + 6) / 7; in j1939_xtp_rx_rts_session_new()
1640 session->pkt.block = 0xff; in j1939_xtp_rx_rts_session_new()
1642 if (dat[3] != session->pkt.total) in j1939_xtp_rx_rts_session_new()
1643 netdev_alert(priv->ndev, "%s: 0x%p: strange total, %u != %u\n", in j1939_xtp_rx_rts_session_new()
1644 __func__, session, session->pkt.total, in j1939_xtp_rx_rts_session_new()
1646 session->pkt.total = dat[3]; in j1939_xtp_rx_rts_session_new()
1647 session->pkt.block = min(dat[3], dat[4]); in j1939_xtp_rx_rts_session_new()
1650 session->pkt.rx = 0; in j1939_xtp_rx_rts_session_new()
1651 session->pkt.tx = 0; in j1939_xtp_rx_rts_session_new()
1653 session->tskey = priv->rx_tskey++; in j1939_xtp_rx_rts_session_new()
1660 * - A time lapse occurred, and a new session was initiated in j1939_xtp_rx_rts_session_new()
1663 * out-scheduled by another task. in j1939_xtp_rx_rts_session_new()
1664 * - The bus is receiving numerous erroneous packets, either in j1939_xtp_rx_rts_session_new()
1667 …netdev_alert(priv->ndev, "%s: 0x%p: concurrent session with same addr (%02x %02x) is already activ… in j1939_xtp_rx_rts_session_new()
1680 struct j1939_priv *priv = session->priv; in j1939_xtp_rx_rts_session_active()
1682 if (!session->transmission) { in j1939_xtp_rx_rts_session_active()
1684 return -EBUSY; in j1939_xtp_rx_rts_session_active()
1686 /* RTS on active session */ in j1939_xtp_rx_rts_session_active()
1691 if (session->last_cmd != 0) { in j1939_xtp_rx_rts_session_active()
1692 /* we received a second rts on the same connection */ in j1939_xtp_rx_rts_session_active()
1693 netdev_alert(priv->ndev, "%s: 0x%p: connection exists (%02x %02x). last cmd: %x\n", in j1939_xtp_rx_rts_session_active()
1694 __func__, session, skcb->addr.sa, skcb->addr.da, in j1939_xtp_rx_rts_session_active()
1695 session->last_cmd); in j1939_xtp_rx_rts_session_active()
1699 if (session->transmission) in j1939_xtp_rx_rts_session_active()
1702 return -EBUSY; in j1939_xtp_rx_rts_session_active()
1705 if (session->skcb.addr.sa != skcb->addr.sa || in j1939_xtp_rx_rts_session_active()
1706 session->skcb.addr.da != skcb->addr.da) in j1939_xtp_rx_rts_session_active()
1707 …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()
1709 session->skcb.addr.sa, skcb->addr.sa, in j1939_xtp_rx_rts_session_active()
1710 session->skcb.addr.da, skcb->addr.da); in j1939_xtp_rx_rts_session_active()
1715 session->skcb.addr.sa = skcb->addr.sa; in j1939_xtp_rx_rts_session_active()
1716 session->skcb.addr.da = skcb->addr.da; in j1939_xtp_rx_rts_session_active()
1718 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_xtp_rx_rts_session_active()
1728 u8 cmd = skb->data[0]; in j1939_xtp_rx_rts()
1730 session = j1939_session_get_by_addr(priv, &skcb->addr, false, in j1939_xtp_rx_rts()
1736 * we received our own RTS. A session has already been in j1939_xtp_rx_rts()
1746 * - user space closed socket was and the session was in j1939_xtp_rx_rts()
1748 * - session was aborted due to external abort message in j1939_xtp_rx_rts()
1755 netdev_info(priv->ndev, "%s: failed to create TP BAM session\n", in j1939_xtp_rx_rts()
1765 session->last_cmd = cmd; in j1939_xtp_rx_rts()
1768 if (!session->transmission) in j1939_xtp_rx_rts()
1771 if (!session->transmission) { in j1939_xtp_rx_rts()
1784 const u8 *dat = skb->data; in j1939_xtp_rx_dpo_one()
1789 netdev_dbg(session->priv->ndev, "%s: 0x%p\n", __func__, session); in j1939_xtp_rx_dpo_one()
1792 session->pkt.dpo = j1939_etp_ctl_to_packet(skb->data); in j1939_xtp_rx_dpo_one()
1793 session->last_cmd = dat[0]; in j1939_xtp_rx_dpo_one()
1796 if (!session->transmission) in j1939_xtp_rx_dpo_one()
1806 session = j1939_session_get_by_addr(priv, &skcb->addr, false, in j1939_xtp_rx_dpo()
1809 netdev_info(priv->ndev, in j1939_xtp_rx_dpo()
1822 struct j1939_priv *priv = session->priv; in j1939_xtp_rx_dat_one()
1835 dat = skb->data; in j1939_xtp_rx_dat_one()
1836 if (skb->len != 8) { in j1939_xtp_rx_dat_one()
1842 switch (session->last_cmd) { in j1939_xtp_rx_dat_one()
1846 if (skcb->addr.type == J1939_ETP) in j1939_xtp_rx_dat_one()
1852 if (skcb->addr.type != J1939_ETP) in j1939_xtp_rx_dat_one()
1856 netdev_info(priv->ndev, "%s: 0x%p: last %02x\n", __func__, in j1939_xtp_rx_dat_one()
1857 session, session->last_cmd); in j1939_xtp_rx_dat_one()
1861 packet = (dat[0] - 1 + session->pkt.dpo); in j1939_xtp_rx_dat_one()
1862 if (packet > session->pkt.total || in j1939_xtp_rx_dat_one()
1863 (session->pkt.rx + 1) > session->pkt.total) { in j1939_xtp_rx_dat_one()
1864 netdev_info(priv->ndev, "%s: 0x%p: should have been completed\n", in j1939_xtp_rx_dat_one()
1871 netdev_warn(priv->ndev, "%s: 0x%p: no skb found\n", __func__, in j1939_xtp_rx_dat_one()
1877 offset = packet * 7 - se_skcb->offset; in j1939_xtp_rx_dat_one()
1878 nbytes = se_skb->len - offset; in j1939_xtp_rx_dat_one()
1881 if (nbytes <= 0 || (nbytes + 1) > skb->len) { in j1939_xtp_rx_dat_one()
1882 netdev_info(priv->ndev, "%s: 0x%p: nbytes %i, len %i\n", in j1939_xtp_rx_dat_one()
1883 __func__, session, nbytes, skb->len); in j1939_xtp_rx_dat_one()
1887 tpdat = se_skb->data; in j1939_xtp_rx_dat_one()
1888 if (!session->transmission) { in j1939_xtp_rx_dat_one()
1895 netdev_err_once(priv->ndev, in j1939_xtp_rx_dat_one()
1896 "%s: 0x%p: Data of RX-looped back packet (%*ph) doesn't match TX data (%*ph)!\n", in j1939_xtp_rx_dat_one()
1902 if (packet == session->pkt.rx) in j1939_xtp_rx_dat_one()
1903 session->pkt.rx++; in j1939_xtp_rx_dat_one()
1905 if (se_skcb->addr.type != J1939_ETP && in j1939_xtp_rx_dat_one()
1906 j1939_cb_is_broadcast(&session->skcb)) { in j1939_xtp_rx_dat_one()
1907 if (session->pkt.rx >= session->pkt.total) in j1939_xtp_rx_dat_one()
1913 if (session->pkt.rx >= session->pkt.last) in j1939_xtp_rx_dat_one()
1921 if (!session->transmission) in j1939_xtp_rx_dat_one()
1925 if (!session->transmission) in j1939_xtp_rx_dat_one()
1930 session->last_cmd = 0xff; in j1939_xtp_rx_dat_one()
1951 session = j1939_session_get_by_addr(priv, &skcb->addr, false, in j1939_xtp_rx_dat()
1954 netdev_info(priv->ndev, "%s: no tx connection found\n", in j1939_xtp_rx_dat()
1961 session = j1939_session_get_by_addr(priv, &skcb->addr, false, in j1939_xtp_rx_dat()
1964 netdev_info(priv->ndev, "%s: no rx connection found\n", in j1939_xtp_rx_dat()
1971 session = j1939_session_get_by_addr(priv, &skcb->addr, false, in j1939_xtp_rx_dat()
1986 if (skcb->addr.pgn == J1939_TP_PGN_DAT || in j1939_tp_send()
1987 skcb->addr.pgn == J1939_TP_PGN_CTL || in j1939_tp_send()
1988 skcb->addr.pgn == J1939_ETP_PGN_DAT || in j1939_tp_send()
1989 skcb->addr.pgn == J1939_ETP_PGN_CTL) in j1939_tp_send()
1991 return ERR_PTR(-EDOM); in j1939_tp_send()
1993 if (size > priv->tp_max_packet_size) in j1939_tp_send()
1994 return ERR_PTR(-EMSGSIZE); in j1939_tp_send()
1997 skcb->addr.type = J1939_SIMPLE; in j1939_tp_send()
1999 skcb->addr.type = J1939_ETP; in j1939_tp_send()
2001 skcb->addr.type = J1939_TP; in j1939_tp_send()
2003 if (skcb->addr.type == J1939_ETP && in j1939_tp_send()
2005 return ERR_PTR(-EDESTADDRREQ); in j1939_tp_send()
2013 if (j1939_address_is_unicast(skcb->addr.da) && in j1939_tp_send()
2014 priv->ents[skcb->addr.da].nusers) in j1939_tp_send()
2015 skcb->flags |= J1939_ECU_LOCAL_DST; in j1939_tp_send()
2018 skcb->flags |= J1939_ECU_LOCAL_SRC; in j1939_tp_send()
2023 return ERR_PTR(-ENOMEM); in j1939_tp_send()
2026 sock_hold(skb->sk); in j1939_tp_send()
2027 session->sk = skb->sk; in j1939_tp_send()
2028 session->transmission = true; in j1939_tp_send()
2029 session->pkt.total = (size + 6) / 7; in j1939_tp_send()
2030 session->pkt.block = skcb->addr.type == J1939_ETP ? 255 : in j1939_tp_send()
2031 min(j1939_tp_block ?: 255, session->pkt.total); in j1939_tp_send()
2033 if (j1939_cb_is_broadcast(&session->skcb)) in j1939_tp_send()
2034 /* set the end-packet for broadcast */ in j1939_tp_send()
2035 session->pkt.last = session->pkt.total; in j1939_tp_send()
2037 skcb->tskey = atomic_inc_return(&session->sk->sk_tskey) - 1; in j1939_tp_send()
2038 session->tskey = skcb->tskey; in j1939_tp_send()
2047 u8 cmd = skb->data[0]; in j1939_tp_cmd_recv()
2055 netdev_err_once(priv->ndev, "%s: BAM to unicast (%02x), ignoring!\n", in j1939_tp_cmd_recv()
2056 __func__, skcb->addr.sa); in j1939_tp_cmd_recv()
2061 if (skcb->addr.type != extd) in j1939_tp_cmd_recv()
2065 netdev_alert(priv->ndev, "%s: rts without destination (%02x)\n", in j1939_tp_cmd_recv()
2066 __func__, skcb->addr.sa); in j1939_tp_cmd_recv()
2082 if (skcb->addr.type != extd) in j1939_tp_cmd_recv()
2094 if (skcb->addr.type != J1939_ETP) in j1939_tp_cmd_recv()
2109 if (skcb->addr.type != extd) in j1939_tp_cmd_recv()
2122 netdev_err_once(priv->ndev, "%s: abort to broadcast (%02x), ignoring!\n", in j1939_tp_cmd_recv()
2123 __func__, skcb->addr.sa); in j1939_tp_cmd_recv()
2146 switch (skcb->addr.pgn) { in j1939_tp_recv()
2148 skcb->addr.type = J1939_ETP; in j1939_tp_recv()
2155 skcb->addr.type = J1939_ETP; in j1939_tp_recv()
2158 if (skb->len < 8) in j1939_tp_recv()
2173 if (!skb->sk) in j1939_simple_recv()
2176 if (skb->sk->sk_family != AF_CAN || in j1939_simple_recv()
2177 skb->sk->sk_protocol != CAN_J1939) in j1939_simple_recv()
2184 netdev_warn(priv->ndev, in j1939_simple_recv()
2199 netdev_dbg(priv->ndev, "%s, sk: %p\n", __func__, sk); in j1939_cancel_active_session()
2202 &priv->active_session_list, in j1939_cancel_active_session()
2204 if (!sk || sk == session->sk) { in j1939_cancel_active_session()
2205 if (hrtimer_try_to_cancel(&session->txtimer) == 1) in j1939_cancel_active_session()
2207 if (hrtimer_try_to_cancel(&session->rxtimer) == 1) in j1939_cancel_active_session()
2210 session->err = ESHUTDOWN; in j1939_cancel_active_session()
2220 spin_lock_init(&priv->active_session_list_lock); in j1939_tp_init()
2221 INIT_LIST_HEAD(&priv->active_session_list); in j1939_tp_init()
2222 priv->tp_max_packet_size = J1939_MAX_ETP_PACKET_SIZE; in j1939_tp_init()