2 * Copyright (c) 2016 Chelsio Communications, Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
9 #include <linux/module.h>
10 #include <linux/list.h>
11 #include <linux/workqueue.h>
12 #include <linux/skbuff.h>
13 #include <linux/timer.h>
14 #include <linux/notifier.h>
15 #include <linux/inetdevice.h>
17 #include <linux/tcp.h>
18 #include <linux/if_vlan.h>
20 #include <net/neighbour.h>
21 #include <net/netevent.h>
22 #include <net/route.h>
24 #include <net/ip6_route.h>
25 #include <net/addrconf.h>
27 #include <libcxgb_cm.h>
31 static void cxgbit_init_wr_wait(struct cxgbit_wr_wait *wr_waitp)
34 reinit_completion(&wr_waitp->completion);
38 cxgbit_wake_up(struct cxgbit_wr_wait *wr_waitp, const char *func, u8 ret)
40 if (ret == CPL_ERR_NONE)
46 pr_err("%s: err:%u", func, ret);
48 complete(&wr_waitp->completion);
52 cxgbit_wait_for_reply(struct cxgbit_device *cdev,
53 struct cxgbit_wr_wait *wr_waitp, u32 tid, u32 timeout,
58 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) {
63 ret = wait_for_completion_timeout(&wr_waitp->completion, timeout * HZ);
65 pr_info("%s - Device %s not responding tid %u\n",
66 func, pci_name(cdev->lldi.pdev), tid);
67 wr_waitp->ret = -ETIMEDOUT;
71 pr_info("%s: FW reply %d tid %u\n",
72 pci_name(cdev->lldi.pdev), wr_waitp->ret, tid);
76 static int cxgbit_np_hashfn(const struct cxgbit_np *cnp)
78 return ((unsigned long)cnp >> 10) & (NP_INFO_HASH_SIZE - 1);
81 static struct np_info *
82 cxgbit_np_hash_add(struct cxgbit_device *cdev, struct cxgbit_np *cnp,
85 struct np_info *p = kzalloc(sizeof(*p), GFP_KERNEL);
88 int bucket = cxgbit_np_hashfn(cnp);
92 spin_lock(&cdev->np_lock);
93 p->next = cdev->np_hash_tab[bucket];
94 cdev->np_hash_tab[bucket] = p;
95 spin_unlock(&cdev->np_lock);
102 cxgbit_np_hash_find(struct cxgbit_device *cdev, struct cxgbit_np *cnp)
104 int stid = -1, bucket = cxgbit_np_hashfn(cnp);
107 spin_lock(&cdev->np_lock);
108 for (p = cdev->np_hash_tab[bucket]; p; p = p->next) {
114 spin_unlock(&cdev->np_lock);
119 static int cxgbit_np_hash_del(struct cxgbit_device *cdev, struct cxgbit_np *cnp)
121 int stid = -1, bucket = cxgbit_np_hashfn(cnp);
122 struct np_info *p, **prev = &cdev->np_hash_tab[bucket];
124 spin_lock(&cdev->np_lock);
125 for (p = *prev; p; prev = &p->next, p = p->next) {
133 spin_unlock(&cdev->np_lock);
138 void _cxgbit_free_cnp(struct kref *kref)
140 struct cxgbit_np *cnp;
142 cnp = container_of(kref, struct cxgbit_np, kref);
147 cxgbit_create_server6(struct cxgbit_device *cdev, unsigned int stid,
148 struct cxgbit_np *cnp)
150 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
151 &cnp->com.local_addr;
155 pr_debug("%s: dev = %s; stid = %u; sin6_port = %u\n",
156 __func__, cdev->lldi.ports[0]->name, stid, sin6->sin6_port);
158 addr_type = ipv6_addr_type((const struct in6_addr *)
160 if (addr_type != IPV6_ADDR_ANY) {
161 ret = cxgb4_clip_get(cdev->lldi.ports[0],
162 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
164 pr_err("Unable to find clip table entry. laddr %pI6. Error:%d.\n",
165 sin6->sin6_addr.s6_addr, ret);
171 cxgbit_init_wr_wait(&cnp->com.wr_wait);
173 ret = cxgb4_create_server6(cdev->lldi.ports[0],
174 stid, &sin6->sin6_addr,
176 cdev->lldi.rxq_ids[0]);
178 ret = cxgbit_wait_for_reply(cdev, &cnp->com.wr_wait,
181 ret = net_xmit_errno(ret);
186 if (ret != -ETIMEDOUT)
187 cxgb4_clip_release(cdev->lldi.ports[0],
188 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
190 pr_err("create server6 err %d stid %d laddr %pI6 lport %d\n",
191 ret, stid, sin6->sin6_addr.s6_addr,
192 ntohs(sin6->sin6_port));
199 cxgbit_create_server4(struct cxgbit_device *cdev, unsigned int stid,
200 struct cxgbit_np *cnp)
202 struct sockaddr_in *sin = (struct sockaddr_in *)
203 &cnp->com.local_addr;
206 pr_debug("%s: dev = %s; stid = %u; sin_port = %u\n",
207 __func__, cdev->lldi.ports[0]->name, stid, sin->sin_port);
210 cxgbit_init_wr_wait(&cnp->com.wr_wait);
212 ret = cxgb4_create_server(cdev->lldi.ports[0],
213 stid, sin->sin_addr.s_addr,
215 cdev->lldi.rxq_ids[0]);
217 ret = cxgbit_wait_for_reply(cdev,
221 ret = net_xmit_errno(ret);
226 pr_err("create server failed err %d stid %d laddr %pI4 lport %d\n",
227 ret, stid, &sin->sin_addr, ntohs(sin->sin_port));
231 struct cxgbit_device *cxgbit_find_device(struct net_device *ndev, u8 *port_id)
233 struct cxgbit_device *cdev;
236 list_for_each_entry(cdev, &cdev_list_head, list) {
237 struct cxgb4_lld_info *lldi = &cdev->lldi;
239 for (i = 0; i < lldi->nports; i++) {
240 if (lldi->ports[i] == ndev) {
251 static struct net_device *cxgbit_get_real_dev(struct net_device *ndev)
253 if (ndev->priv_flags & IFF_BONDING) {
254 pr_err("Bond devices are not supported. Interface:%s\n",
259 if (is_vlan_dev(ndev))
260 return vlan_dev_real_dev(ndev);
265 static struct net_device *cxgbit_ipv4_netdev(__be32 saddr)
267 struct net_device *ndev;
269 ndev = __ip_dev_find(&init_net, saddr, false);
273 return cxgbit_get_real_dev(ndev);
276 static struct net_device *cxgbit_ipv6_netdev(struct in6_addr *addr6)
278 struct net_device *ndev = NULL;
281 if (IS_ENABLED(CONFIG_IPV6)) {
282 for_each_netdev_rcu(&init_net, ndev)
283 if (ipv6_chk_addr(&init_net, addr6, ndev, 1)) {
290 return cxgbit_get_real_dev(ndev);
293 static struct cxgbit_device *cxgbit_find_np_cdev(struct cxgbit_np *cnp)
295 struct sockaddr_storage *sockaddr = &cnp->com.local_addr;
296 int ss_family = sockaddr->ss_family;
297 struct net_device *ndev = NULL;
298 struct cxgbit_device *cdev = NULL;
301 if (ss_family == AF_INET) {
302 struct sockaddr_in *sin;
304 sin = (struct sockaddr_in *)sockaddr;
305 ndev = cxgbit_ipv4_netdev(sin->sin_addr.s_addr);
306 } else if (ss_family == AF_INET6) {
307 struct sockaddr_in6 *sin6;
309 sin6 = (struct sockaddr_in6 *)sockaddr;
310 ndev = cxgbit_ipv6_netdev(&sin6->sin6_addr);
315 cdev = cxgbit_find_device(ndev, NULL);
321 static bool cxgbit_inaddr_any(struct cxgbit_np *cnp)
323 struct sockaddr_storage *sockaddr = &cnp->com.local_addr;
324 int ss_family = sockaddr->ss_family;
327 if (ss_family == AF_INET) {
328 struct sockaddr_in *sin;
330 sin = (struct sockaddr_in *)sockaddr;
331 if (sin->sin_addr.s_addr == htonl(INADDR_ANY))
333 } else if (ss_family == AF_INET6) {
334 struct sockaddr_in6 *sin6;
336 sin6 = (struct sockaddr_in6 *)sockaddr;
337 addr_type = ipv6_addr_type((const struct in6_addr *)
339 if (addr_type == IPV6_ADDR_ANY)
346 __cxgbit_setup_cdev_np(struct cxgbit_device *cdev, struct cxgbit_np *cnp)
349 int ss_family = cnp->com.local_addr.ss_family;
351 if (!test_bit(CDEV_STATE_UP, &cdev->flags))
354 stid = cxgb4_alloc_stid(cdev->lldi.tids, ss_family, cnp);
358 if (!cxgbit_np_hash_add(cdev, cnp, stid)) {
359 cxgb4_free_stid(cdev->lldi.tids, stid, ss_family);
363 if (ss_family == AF_INET)
364 ret = cxgbit_create_server4(cdev, stid, cnp);
366 ret = cxgbit_create_server6(cdev, stid, cnp);
369 if (ret != -ETIMEDOUT)
370 cxgb4_free_stid(cdev->lldi.tids, stid,
372 cxgbit_np_hash_del(cdev, cnp);
378 static int cxgbit_setup_cdev_np(struct cxgbit_np *cnp)
380 struct cxgbit_device *cdev;
383 mutex_lock(&cdev_list_lock);
384 cdev = cxgbit_find_np_cdev(cnp);
388 if (cxgbit_np_hash_find(cdev, cnp) >= 0)
391 if (__cxgbit_setup_cdev_np(cdev, cnp))
394 cnp->com.cdev = cdev;
397 mutex_unlock(&cdev_list_lock);
401 static int cxgbit_setup_all_np(struct cxgbit_np *cnp)
403 struct cxgbit_device *cdev;
407 mutex_lock(&cdev_list_lock);
408 list_for_each_entry(cdev, &cdev_list_head, list) {
409 if (cxgbit_np_hash_find(cdev, cnp) >= 0) {
410 mutex_unlock(&cdev_list_lock);
415 list_for_each_entry(cdev, &cdev_list_head, list) {
416 ret = __cxgbit_setup_cdev_np(cdev, cnp);
417 if (ret == -ETIMEDOUT)
423 mutex_unlock(&cdev_list_lock);
425 return count ? 0 : -1;
428 int cxgbit_setup_np(struct iscsi_np *np, struct sockaddr_storage *ksockaddr)
430 struct cxgbit_np *cnp;
433 if ((ksockaddr->ss_family != AF_INET) &&
434 (ksockaddr->ss_family != AF_INET6))
437 cnp = kzalloc(sizeof(*cnp), GFP_KERNEL);
441 init_waitqueue_head(&cnp->accept_wait);
442 init_completion(&cnp->com.wr_wait.completion);
443 init_completion(&cnp->accept_comp);
444 INIT_LIST_HEAD(&cnp->np_accept_list);
445 spin_lock_init(&cnp->np_accept_lock);
446 kref_init(&cnp->kref);
447 memcpy(&np->np_sockaddr, ksockaddr,
448 sizeof(struct sockaddr_storage));
449 memcpy(&cnp->com.local_addr, &np->np_sockaddr,
450 sizeof(cnp->com.local_addr));
453 cnp->com.cdev = NULL;
455 if (cxgbit_inaddr_any(cnp))
456 ret = cxgbit_setup_all_np(cnp);
458 ret = cxgbit_setup_cdev_np(cnp);
465 np->np_context = cnp;
466 cnp->com.state = CSK_STATE_LISTEN;
471 cxgbit_set_conn_info(struct iscsi_np *np, struct iscsi_conn *conn,
472 struct cxgbit_sock *csk)
474 conn->login_family = np->np_sockaddr.ss_family;
475 conn->login_sockaddr = csk->com.remote_addr;
476 conn->local_sockaddr = csk->com.local_addr;
479 int cxgbit_accept_np(struct iscsi_np *np, struct iscsi_conn *conn)
481 struct cxgbit_np *cnp = np->np_context;
482 struct cxgbit_sock *csk;
486 ret = wait_for_completion_interruptible(&cnp->accept_comp);
490 spin_lock_bh(&np->np_thread_lock);
491 if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) {
492 spin_unlock_bh(&np->np_thread_lock);
494 * No point in stalling here when np_thread
495 * is in state RESET/SHUTDOWN/EXIT - bail
499 spin_unlock_bh(&np->np_thread_lock);
501 spin_lock_bh(&cnp->np_accept_lock);
502 if (list_empty(&cnp->np_accept_list)) {
503 spin_unlock_bh(&cnp->np_accept_lock);
507 csk = list_first_entry(&cnp->np_accept_list,
511 list_del_init(&csk->accept_node);
512 spin_unlock_bh(&cnp->np_accept_lock);
516 cxgbit_set_conn_info(np, conn, csk);
521 __cxgbit_free_cdev_np(struct cxgbit_device *cdev, struct cxgbit_np *cnp)
526 stid = cxgbit_np_hash_del(cdev, cnp);
529 if (!test_bit(CDEV_STATE_UP, &cdev->flags))
532 if (cnp->np->np_sockaddr.ss_family == AF_INET6)
536 cxgbit_init_wr_wait(&cnp->com.wr_wait);
537 ret = cxgb4_remove_server(cdev->lldi.ports[0], stid,
538 cdev->lldi.rxq_ids[0], ipv6);
541 ret = net_xmit_errno(ret);
548 ret = cxgbit_wait_for_reply(cdev, &cnp->com.wr_wait,
550 if (ret == -ETIMEDOUT)
553 if (ipv6 && cnp->com.cdev) {
554 struct sockaddr_in6 *sin6;
556 sin6 = (struct sockaddr_in6 *)&cnp->com.local_addr;
557 cxgb4_clip_release(cdev->lldi.ports[0],
558 (const u32 *)&sin6->sin6_addr.s6_addr,
562 cxgb4_free_stid(cdev->lldi.tids, stid,
563 cnp->com.local_addr.ss_family);
567 static void cxgbit_free_all_np(struct cxgbit_np *cnp)
569 struct cxgbit_device *cdev;
572 mutex_lock(&cdev_list_lock);
573 list_for_each_entry(cdev, &cdev_list_head, list) {
574 ret = __cxgbit_free_cdev_np(cdev, cnp);
575 if (ret == -ETIMEDOUT)
578 mutex_unlock(&cdev_list_lock);
581 static void cxgbit_free_cdev_np(struct cxgbit_np *cnp)
583 struct cxgbit_device *cdev;
586 mutex_lock(&cdev_list_lock);
587 list_for_each_entry(cdev, &cdev_list_head, list) {
588 if (cdev == cnp->com.cdev) {
596 __cxgbit_free_cdev_np(cdev, cnp);
598 mutex_unlock(&cdev_list_lock);
601 void cxgbit_free_np(struct iscsi_np *np)
603 struct cxgbit_np *cnp = np->np_context;
605 cnp->com.state = CSK_STATE_DEAD;
607 cxgbit_free_cdev_np(cnp);
609 cxgbit_free_all_np(cnp);
611 np->np_context = NULL;
615 static void cxgbit_send_halfclose(struct cxgbit_sock *csk)
618 u32 len = roundup(sizeof(struct cpl_close_con_req), 16);
620 skb = alloc_skb(len, GFP_ATOMIC);
624 cxgb_mk_close_con_req(skb, len, csk->tid, csk->txq_idx,
627 cxgbit_skcb_flags(skb) |= SKCBF_TX_FLAG_COMPL;
628 __skb_queue_tail(&csk->txq, skb);
629 cxgbit_push_tx_frames(csk);
632 static void cxgbit_arp_failure_discard(void *handle, struct sk_buff *skb)
634 pr_debug("%s cxgbit_device %p\n", __func__, handle);
638 static void cxgbit_abort_arp_failure(void *handle, struct sk_buff *skb)
640 struct cxgbit_device *cdev = handle;
641 struct cpl_abort_req *req = cplhdr(skb);
643 pr_debug("%s cdev %p\n", __func__, cdev);
644 req->cmd = CPL_ABORT_NO_RST;
645 cxgbit_ofld_send(cdev, skb);
648 static int cxgbit_send_abort_req(struct cxgbit_sock *csk)
651 u32 len = roundup(sizeof(struct cpl_abort_req), 16);
653 pr_debug("%s: csk %p tid %u; state %d\n",
654 __func__, csk, csk->tid, csk->com.state);
656 __skb_queue_purge(&csk->txq);
658 if (!test_and_set_bit(CSK_TX_DATA_SENT, &csk->com.flags))
659 cxgbit_send_tx_flowc_wr(csk);
661 skb = __skb_dequeue(&csk->skbq);
662 cxgb_mk_abort_req(skb, len, csk->tid, csk->txq_idx,
663 csk->com.cdev, cxgbit_abort_arp_failure);
665 return cxgbit_l2t_send(csk->com.cdev, skb, csk->l2t);
668 void cxgbit_free_conn(struct iscsi_conn *conn)
670 struct cxgbit_sock *csk = conn->context;
671 bool release = false;
673 pr_debug("%s: state %d\n",
674 __func__, csk->com.state);
676 spin_lock_bh(&csk->lock);
677 switch (csk->com.state) {
678 case CSK_STATE_ESTABLISHED:
679 if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) {
680 csk->com.state = CSK_STATE_CLOSING;
681 cxgbit_send_halfclose(csk);
683 csk->com.state = CSK_STATE_ABORTING;
684 cxgbit_send_abort_req(csk);
687 case CSK_STATE_CLOSING:
688 csk->com.state = CSK_STATE_MORIBUND;
689 cxgbit_send_halfclose(csk);
695 pr_err("%s: csk %p; state %d\n",
696 __func__, csk, csk->com.state);
698 spin_unlock_bh(&csk->lock);
704 static void cxgbit_set_emss(struct cxgbit_sock *csk, u16 opt)
706 csk->emss = csk->com.cdev->lldi.mtus[TCPOPT_MSS_G(opt)] -
707 ((csk->com.remote_addr.ss_family == AF_INET) ?
708 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
709 sizeof(struct tcphdr);
710 csk->mss = csk->emss;
711 if (TCPOPT_TSTAMP_G(opt))
712 csk->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
716 pr_info("Warning: misaligned mtu idx %u mss %u emss=%u\n",
717 TCPOPT_MSS_G(opt), csk->mss, csk->emss);
718 pr_debug("%s mss_idx %u mss %u emss=%u\n", __func__, TCPOPT_MSS_G(opt),
719 csk->mss, csk->emss);
722 static void cxgbit_free_skb(struct cxgbit_sock *csk)
726 __skb_queue_purge(&csk->txq);
727 __skb_queue_purge(&csk->rxq);
728 __skb_queue_purge(&csk->backlogq);
729 __skb_queue_purge(&csk->ppodq);
730 __skb_queue_purge(&csk->skbq);
732 while ((skb = cxgbit_sock_dequeue_wr(csk)))
735 __kfree_skb(csk->lro_hskb);
738 void _cxgbit_free_csk(struct kref *kref)
740 struct cxgbit_sock *csk;
741 struct cxgbit_device *cdev;
743 csk = container_of(kref, struct cxgbit_sock, kref);
745 pr_debug("%s csk %p state %d\n", __func__, csk, csk->com.state);
747 if (csk->com.local_addr.ss_family == AF_INET6) {
748 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
749 &csk->com.local_addr;
750 cxgb4_clip_release(csk->com.cdev->lldi.ports[0],
752 &sin6->sin6_addr.s6_addr, 1);
755 cxgb4_remove_tid(csk->com.cdev->lldi.tids, 0, csk->tid,
756 csk->com.local_addr.ss_family);
757 dst_release(csk->dst);
758 cxgb4_l2t_release(csk->l2t);
760 cdev = csk->com.cdev;
761 spin_lock_bh(&cdev->cskq.lock);
762 list_del(&csk->list);
763 spin_unlock_bh(&cdev->cskq.lock);
765 cxgbit_free_skb(csk);
766 cxgbit_put_cdev(cdev);
771 static void cxgbit_set_tcp_window(struct cxgbit_sock *csk, struct port_info *pi)
773 unsigned int linkspeed;
776 linkspeed = pi->link_cfg.speed;
777 scale = linkspeed / SPEED_10000;
779 #define CXGBIT_10G_RCV_WIN (256 * 1024)
780 csk->rcv_win = CXGBIT_10G_RCV_WIN;
782 csk->rcv_win *= scale;
784 #define CXGBIT_10G_SND_WIN (256 * 1024)
785 csk->snd_win = CXGBIT_10G_SND_WIN;
787 csk->snd_win *= scale;
789 pr_debug("%s snd_win %d rcv_win %d\n",
790 __func__, csk->snd_win, csk->rcv_win);
793 #ifdef CONFIG_CHELSIO_T4_DCB
794 static u8 cxgbit_get_iscsi_dcb_state(struct net_device *ndev)
796 return ndev->dcbnl_ops->getstate(ndev);
799 static int cxgbit_select_priority(int pri_mask)
804 return (ffs(pri_mask) - 1);
807 static u8 cxgbit_get_iscsi_dcb_priority(struct net_device *ndev, u16 local_port)
812 struct dcb_app iscsi_dcb_app = {
813 .protocol = local_port
816 ret = (int)ndev->dcbnl_ops->getcap(ndev, DCB_CAP_ATTR_DCBX, &caps);
821 if (caps & DCB_CAP_DCBX_VER_IEEE) {
822 iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_ANY;
824 ret = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app);
826 } else if (caps & DCB_CAP_DCBX_VER_CEE) {
827 iscsi_dcb_app.selector = DCB_APP_IDTYPE_PORTNUM;
829 ret = dcb_getapp(ndev, &iscsi_dcb_app);
832 pr_info("iSCSI priority is set to %u\n", cxgbit_select_priority(ret));
834 return cxgbit_select_priority(ret);
839 cxgbit_offload_init(struct cxgbit_sock *csk, int iptype, __u8 *peer_ip,
840 u16 local_port, struct dst_entry *dst,
841 struct cxgbit_device *cdev)
845 struct net_device *ndev;
846 u16 rxq_idx, port_id;
847 #ifdef CONFIG_CHELSIO_T4_DCB
851 n = dst_neigh_lookup(dst, peer_ip);
857 if (n->dev->flags & IFF_LOOPBACK) {
859 ndev = cxgbit_ipv4_netdev(*(__be32 *)peer_ip);
860 else if (IS_ENABLED(CONFIG_IPV6))
861 ndev = cxgbit_ipv6_netdev((struct in6_addr *)peer_ip);
870 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t,
874 csk->mtu = ndev->mtu;
875 csk->tx_chan = cxgb4_port_chan(ndev);
876 csk->smac_idx = cxgb4_tp_smt_idx(cdev->lldi.adapter_type,
877 cxgb4_port_viid(ndev));
878 step = cdev->lldi.ntxq /
880 csk->txq_idx = cxgb4_port_idx(ndev) * step;
881 step = cdev->lldi.nrxq /
883 csk->ctrlq_idx = cxgb4_port_idx(ndev);
884 csk->rss_qid = cdev->lldi.rxq_ids[
885 cxgb4_port_idx(ndev) * step];
886 csk->port_id = cxgb4_port_idx(ndev);
887 cxgbit_set_tcp_window(csk,
888 (struct port_info *)netdev_priv(ndev));
890 ndev = cxgbit_get_real_dev(n->dev);
896 #ifdef CONFIG_CHELSIO_T4_DCB
897 if (cxgbit_get_iscsi_dcb_state(ndev))
898 priority = cxgbit_get_iscsi_dcb_priority(ndev,
901 csk->dcb_priority = priority;
903 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t, n, ndev, priority);
905 csk->l2t = cxgb4_l2t_get(cdev->lldi.l2t, n, ndev, 0);
909 port_id = cxgb4_port_idx(ndev);
910 csk->mtu = dst_mtu(dst);
911 csk->tx_chan = cxgb4_port_chan(ndev);
912 csk->smac_idx = cxgb4_tp_smt_idx(cdev->lldi.adapter_type,
913 cxgb4_port_viid(ndev));
914 step = cdev->lldi.ntxq /
916 csk->txq_idx = (port_id * step) +
917 (cdev->selectq[port_id][0]++ % step);
918 csk->ctrlq_idx = cxgb4_port_idx(ndev);
919 step = cdev->lldi.nrxq /
921 rxq_idx = (port_id * step) +
922 (cdev->selectq[port_id][1]++ % step);
923 csk->rss_qid = cdev->lldi.rxq_ids[rxq_idx];
924 csk->port_id = port_id;
925 cxgbit_set_tcp_window(csk,
926 (struct port_info *)netdev_priv(ndev));
935 int cxgbit_ofld_send(struct cxgbit_device *cdev, struct sk_buff *skb)
939 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) {
941 pr_err("%s - device not up - dropping\n", __func__);
945 ret = cxgb4_ofld_send(cdev->lldi.ports[0], skb);
948 return ret < 0 ? ret : 0;
951 static void cxgbit_release_tid(struct cxgbit_device *cdev, u32 tid)
953 u32 len = roundup(sizeof(struct cpl_tid_release), 16);
956 skb = alloc_skb(len, GFP_ATOMIC);
960 cxgb_mk_tid_release(skb, len, tid, 0);
961 cxgbit_ofld_send(cdev, skb);
965 cxgbit_l2t_send(struct cxgbit_device *cdev, struct sk_buff *skb,
966 struct l2t_entry *l2e)
970 if (!test_bit(CDEV_STATE_UP, &cdev->flags)) {
972 pr_err("%s - device not up - dropping\n", __func__);
976 ret = cxgb4_l2t_send(cdev->lldi.ports[0], skb, l2e);
979 return ret < 0 ? ret : 0;
982 static void cxgbit_send_rx_credits(struct cxgbit_sock *csk, struct sk_buff *skb)
984 if (csk->com.state != CSK_STATE_ESTABLISHED) {
989 cxgbit_ofld_send(csk->com.cdev, skb);
993 * CPL connection rx data ack: host ->
994 * Send RX credits through an RX_DATA_ACK CPL message.
995 * Returns the number of credits sent.
997 int cxgbit_rx_data_ack(struct cxgbit_sock *csk)
1000 u32 len = roundup(sizeof(struct cpl_rx_data_ack), 16);
1003 skb = alloc_skb(len, GFP_KERNEL);
1007 credit_dack = RX_DACK_CHANGE_F | RX_DACK_MODE_V(1) |
1008 RX_CREDITS_V(csk->rx_credits);
1010 cxgb_mk_rx_data_ack(skb, len, csk->tid, csk->ctrlq_idx,
1013 csk->rx_credits = 0;
1015 spin_lock_bh(&csk->lock);
1016 if (csk->lock_owner) {
1017 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_send_rx_credits;
1018 __skb_queue_tail(&csk->backlogq, skb);
1019 spin_unlock_bh(&csk->lock);
1023 cxgbit_send_rx_credits(csk, skb);
1024 spin_unlock_bh(&csk->lock);
1029 #define FLOWC_WR_NPARAMS_MIN 9
1030 #define FLOWC_WR_NPARAMS_MAX 11
1031 static int cxgbit_alloc_csk_skb(struct cxgbit_sock *csk)
1033 struct sk_buff *skb;
1037 flowclen = offsetof(struct fw_flowc_wr,
1038 mnemval[FLOWC_WR_NPARAMS_MAX]);
1040 len = max_t(u32, sizeof(struct cpl_abort_req),
1041 sizeof(struct cpl_abort_rpl));
1043 len = max(len, flowclen);
1044 len = roundup(len, 16);
1046 for (i = 0; i < 3; i++) {
1047 skb = alloc_skb(len, GFP_ATOMIC);
1050 __skb_queue_tail(&csk->skbq, skb);
1053 skb = alloc_skb(LRO_SKB_MIN_HEADROOM, GFP_ATOMIC);
1057 memset(skb->data, 0, LRO_SKB_MIN_HEADROOM);
1058 csk->lro_hskb = skb;
1062 __skb_queue_purge(&csk->skbq);
1067 cxgbit_pass_accept_rpl(struct cxgbit_sock *csk, struct cpl_pass_accept_req *req)
1069 struct sk_buff *skb;
1070 const struct tcphdr *tcph;
1071 struct cpl_t5_pass_accept_rpl *rpl5;
1072 struct cxgb4_lld_info *lldi = &csk->com.cdev->lldi;
1073 unsigned int len = roundup(sizeof(*rpl5), 16);
1074 unsigned int mtu_idx;
1080 pr_debug("%s csk %p tid %u\n", __func__, csk, csk->tid);
1082 skb = alloc_skb(len, GFP_ATOMIC);
1084 cxgbit_put_csk(csk);
1088 rpl5 = __skb_put_zero(skb, len);
1090 INIT_TP_WR(rpl5, csk->tid);
1091 OPCODE_TID(rpl5) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1093 cxgb_best_mtu(csk->com.cdev->lldi.mtus, csk->mtu, &mtu_idx,
1095 (csk->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
1096 wscale = cxgb_compute_wscale(csk->rcv_win);
1098 * Specify the largest window that will fit in opt0. The
1099 * remainder will be specified in the rx_data_ack.
1101 win = csk->rcv_win >> 10;
1102 if (win > RCV_BUFSIZ_M)
1104 opt0 = TCAM_BYPASS_F |
1105 WND_SCALE_V(wscale) |
1106 MSS_IDX_V(mtu_idx) |
1107 L2T_IDX_V(csk->l2t->idx) |
1108 TX_CHAN_V(csk->tx_chan) |
1109 SMAC_SEL_V(csk->smac_idx) |
1110 DSCP_V(csk->tos >> 2) |
1111 ULP_MODE_V(ULP_MODE_ISCSI) |
1114 opt2 = RX_CHANNEL_V(0) |
1115 RSS_QUEUE_VALID_F | RSS_QUEUE_V(csk->rss_qid);
1117 if (!is_t5(lldi->adapter_type))
1118 opt2 |= RX_FC_DISABLE_F;
1120 if (req->tcpopt.tstamp)
1121 opt2 |= TSTAMPS_EN_F;
1122 if (req->tcpopt.sack)
1125 opt2 |= WND_SCALE_EN_F;
1127 hlen = ntohl(req->hdr_len);
1129 if (is_t5(lldi->adapter_type))
1130 tcph = (struct tcphdr *)((u8 *)(req + 1) +
1131 ETH_HDR_LEN_G(hlen) + IP_HDR_LEN_G(hlen));
1133 tcph = (struct tcphdr *)((u8 *)(req + 1) +
1134 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen));
1136 if (tcph->ece && tcph->cwr)
1137 opt2 |= CCTRL_ECN_V(1);
1139 opt2 |= RX_COALESCE_V(3);
1140 opt2 |= CONG_CNTRL_V(CONG_ALG_NEWRENO);
1143 rpl5->iss = cpu_to_be32((prandom_u32() & ~7UL) - 1);
1145 opt2 |= T5_OPT_2_VALID_F;
1147 rpl5->opt0 = cpu_to_be64(opt0);
1148 rpl5->opt2 = cpu_to_be32(opt2);
1149 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->ctrlq_idx);
1150 t4_set_arp_err_handler(skb, NULL, cxgbit_arp_failure_discard);
1151 cxgbit_l2t_send(csk->com.cdev, skb, csk->l2t);
1155 cxgbit_pass_accept_req(struct cxgbit_device *cdev, struct sk_buff *skb)
1157 struct cxgbit_sock *csk = NULL;
1158 struct cxgbit_np *cnp;
1159 struct cpl_pass_accept_req *req = cplhdr(skb);
1160 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1161 struct tid_info *t = cdev->lldi.tids;
1162 unsigned int tid = GET_TID(req);
1163 u16 peer_mss = ntohs(req->tcpopt.mss);
1164 unsigned short hdrs;
1166 struct dst_entry *dst;
1167 __u8 local_ip[16], peer_ip[16];
1168 __be16 local_port, peer_port;
1172 pr_debug("%s: cdev = %p; stid = %u; tid = %u\n",
1173 __func__, cdev, stid, tid);
1175 cnp = lookup_stid(t, stid);
1177 pr_err("%s connect request on invalid stid %d\n",
1182 if (cnp->com.state != CSK_STATE_LISTEN) {
1183 pr_err("%s - listening parent not in CSK_STATE_LISTEN\n",
1188 csk = lookup_tid(t, tid);
1190 pr_err("%s csk not null tid %u\n",
1195 cxgb_get_4tuple(req, cdev->lldi.adapter_type, &iptype, local_ip,
1196 peer_ip, &local_port, &peer_port);
1198 /* Find output route */
1200 pr_debug("%s parent sock %p tid %u laddr %pI4 raddr %pI4 "
1201 "lport %d rport %d peer_mss %d\n"
1202 , __func__, cnp, tid,
1203 local_ip, peer_ip, ntohs(local_port),
1204 ntohs(peer_port), peer_mss);
1205 dst = cxgb_find_route(&cdev->lldi, cxgbit_get_real_dev,
1206 *(__be32 *)local_ip,
1208 local_port, peer_port,
1209 PASS_OPEN_TOS_G(ntohl(req->tos_stid)));
1211 pr_debug("%s parent sock %p tid %u laddr %pI6 raddr %pI6 "
1212 "lport %d rport %d peer_mss %d\n"
1213 , __func__, cnp, tid,
1214 local_ip, peer_ip, ntohs(local_port),
1215 ntohs(peer_port), peer_mss);
1216 dst = cxgb_find_route6(&cdev->lldi, cxgbit_get_real_dev,
1218 local_port, peer_port,
1219 PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
1220 ((struct sockaddr_in6 *)
1221 &cnp->com.local_addr)->sin6_scope_id);
1224 pr_err("%s - failed to find dst entry!\n",
1229 csk = kzalloc(sizeof(*csk), GFP_ATOMIC);
1235 ret = cxgbit_offload_init(csk, iptype, peer_ip, ntohs(local_port),
1238 pr_err("%s - failed to allocate l2t entry!\n",
1245 kref_init(&csk->kref);
1246 init_completion(&csk->com.wr_wait.completion);
1248 INIT_LIST_HEAD(&csk->accept_node);
1250 hdrs = (iptype == 4 ? sizeof(struct iphdr) : sizeof(struct ipv6hdr)) +
1251 sizeof(struct tcphdr) + (req->tcpopt.tstamp ? 12 : 0);
1252 if (peer_mss && csk->mtu > (peer_mss + hdrs))
1253 csk->mtu = peer_mss + hdrs;
1255 csk->com.state = CSK_STATE_CONNECTING;
1256 csk->com.cdev = cdev;
1258 csk->tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
1261 csk->wr_cred = cdev->lldi.wr_cred -
1262 DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1263 csk->wr_max_cred = csk->wr_cred;
1264 csk->wr_una_cred = 0;
1267 struct sockaddr_in *sin = (struct sockaddr_in *)
1268 &csk->com.local_addr;
1269 sin->sin_family = AF_INET;
1270 sin->sin_port = local_port;
1271 sin->sin_addr.s_addr = *(__be32 *)local_ip;
1273 sin = (struct sockaddr_in *)&csk->com.remote_addr;
1274 sin->sin_family = AF_INET;
1275 sin->sin_port = peer_port;
1276 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
1278 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
1279 &csk->com.local_addr;
1281 sin6->sin6_family = PF_INET6;
1282 sin6->sin6_port = local_port;
1283 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
1284 cxgb4_clip_get(cdev->lldi.ports[0],
1285 (const u32 *)&sin6->sin6_addr.s6_addr,
1288 sin6 = (struct sockaddr_in6 *)&csk->com.remote_addr;
1289 sin6->sin6_family = PF_INET6;
1290 sin6->sin6_port = peer_port;
1291 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
1294 skb_queue_head_init(&csk->rxq);
1295 skb_queue_head_init(&csk->txq);
1296 skb_queue_head_init(&csk->ppodq);
1297 skb_queue_head_init(&csk->backlogq);
1298 skb_queue_head_init(&csk->skbq);
1299 cxgbit_sock_reset_wr_list(csk);
1300 spin_lock_init(&csk->lock);
1301 init_waitqueue_head(&csk->waitq);
1302 init_waitqueue_head(&csk->ack_waitq);
1303 csk->lock_owner = false;
1305 if (cxgbit_alloc_csk_skb(csk)) {
1311 cxgbit_get_cdev(cdev);
1313 spin_lock(&cdev->cskq.lock);
1314 list_add_tail(&csk->list, &cdev->cskq.list);
1315 spin_unlock(&cdev->cskq.lock);
1316 cxgb4_insert_tid(t, csk, tid, csk->com.local_addr.ss_family);
1317 cxgbit_pass_accept_rpl(csk, req);
1321 cxgbit_release_tid(cdev, tid);
1327 cxgbit_tx_flowc_wr_credits(struct cxgbit_sock *csk, u32 *nparamsp,
1330 u32 nparams, flowclen16, flowclen;
1332 nparams = FLOWC_WR_NPARAMS_MIN;
1334 if (csk->snd_wscale)
1337 #ifdef CONFIG_CHELSIO_T4_DCB
1340 flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
1341 flowclen16 = DIV_ROUND_UP(flowclen, 16);
1342 flowclen = flowclen16 * 16;
1344 * Return the number of 16-byte credits used by the flowc request.
1345 * Pass back the nparams and actual flowc length if requested.
1348 *nparamsp = nparams;
1350 *flowclenp = flowclen;
1354 u32 cxgbit_send_tx_flowc_wr(struct cxgbit_sock *csk)
1356 struct cxgbit_device *cdev = csk->com.cdev;
1357 struct fw_flowc_wr *flowc;
1358 u32 nparams, flowclen16, flowclen;
1359 struct sk_buff *skb;
1362 #ifdef CONFIG_CHELSIO_T4_DCB
1363 u16 vlan = ((struct l2t_entry *)csk->l2t)->vlan;
1366 flowclen16 = cxgbit_tx_flowc_wr_credits(csk, &nparams, &flowclen);
1368 skb = __skb_dequeue(&csk->skbq);
1369 flowc = __skb_put_zero(skb, flowclen);
1371 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
1372 FW_FLOWC_WR_NPARAMS_V(nparams));
1373 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(flowclen16) |
1374 FW_WR_FLOWID_V(csk->tid));
1375 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
1376 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
1377 (csk->com.cdev->lldi.pf));
1378 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
1379 flowc->mnemval[1].val = cpu_to_be32(csk->tx_chan);
1380 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
1381 flowc->mnemval[2].val = cpu_to_be32(csk->tx_chan);
1382 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
1383 flowc->mnemval[3].val = cpu_to_be32(csk->rss_qid);
1384 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
1385 flowc->mnemval[4].val = cpu_to_be32(csk->snd_nxt);
1386 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
1387 flowc->mnemval[5].val = cpu_to_be32(csk->rcv_nxt);
1388 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
1389 flowc->mnemval[6].val = cpu_to_be32(csk->snd_win);
1390 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
1391 flowc->mnemval[7].val = cpu_to_be32(csk->emss);
1393 flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
1394 if (test_bit(CDEV_ISO_ENABLE, &cdev->flags))
1395 flowc->mnemval[8].val = cpu_to_be32(CXGBIT_MAX_ISO_PAYLOAD);
1397 flowc->mnemval[8].val = cpu_to_be32(16384);
1401 if (csk->snd_wscale) {
1402 flowc->mnemval[index].mnemonic = FW_FLOWC_MNEM_RCV_SCALE;
1403 flowc->mnemval[index].val = cpu_to_be32(csk->snd_wscale);
1407 #ifdef CONFIG_CHELSIO_T4_DCB
1408 flowc->mnemval[index].mnemonic = FW_FLOWC_MNEM_DCBPRIO;
1409 if (vlan == VLAN_NONE) {
1410 pr_warn("csk %u without VLAN Tag on DCB Link\n", csk->tid);
1411 flowc->mnemval[index].val = cpu_to_be32(0);
1413 flowc->mnemval[index].val = cpu_to_be32(
1414 (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT);
1417 pr_debug("%s: csk %p; tx_chan = %u; rss_qid = %u; snd_seq = %u;"
1418 " rcv_seq = %u; snd_win = %u; emss = %u\n",
1419 __func__, csk, csk->tx_chan, csk->rss_qid, csk->snd_nxt,
1420 csk->rcv_nxt, csk->snd_win, csk->emss);
1421 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->txq_idx);
1422 cxgbit_ofld_send(csk->com.cdev, skb);
1426 int cxgbit_setup_conn_digest(struct cxgbit_sock *csk)
1428 struct sk_buff *skb;
1429 struct cpl_set_tcb_field *req;
1430 u8 hcrc = csk->submode & CXGBIT_SUBMODE_HCRC;
1431 u8 dcrc = csk->submode & CXGBIT_SUBMODE_DCRC;
1432 unsigned int len = roundup(sizeof(*req), 16);
1435 skb = alloc_skb(len, GFP_KERNEL);
1439 /* set up ulp submode */
1440 req = __skb_put_zero(skb, len);
1442 INIT_TP_WR(req, csk->tid);
1443 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1444 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid));
1445 req->word_cookie = htons(0);
1446 req->mask = cpu_to_be64(0x3 << 4);
1447 req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1448 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1449 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->ctrlq_idx);
1451 cxgbit_get_csk(csk);
1452 cxgbit_init_wr_wait(&csk->com.wr_wait);
1454 cxgbit_ofld_send(csk->com.cdev, skb);
1456 ret = cxgbit_wait_for_reply(csk->com.cdev,
1458 csk->tid, 5, __func__);
1465 int cxgbit_setup_conn_pgidx(struct cxgbit_sock *csk, u32 pg_idx)
1467 struct sk_buff *skb;
1468 struct cpl_set_tcb_field *req;
1469 unsigned int len = roundup(sizeof(*req), 16);
1472 skb = alloc_skb(len, GFP_KERNEL);
1476 req = __skb_put_zero(skb, len);
1478 INIT_TP_WR(req, csk->tid);
1479 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1480 req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid));
1481 req->word_cookie = htons(0);
1482 req->mask = cpu_to_be64(0x3 << 8);
1483 req->val = cpu_to_be64(pg_idx << 8);
1484 set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->ctrlq_idx);
1486 cxgbit_get_csk(csk);
1487 cxgbit_init_wr_wait(&csk->com.wr_wait);
1489 cxgbit_ofld_send(csk->com.cdev, skb);
1491 ret = cxgbit_wait_for_reply(csk->com.cdev,
1493 csk->tid, 5, __func__);
1501 cxgbit_pass_open_rpl(struct cxgbit_device *cdev, struct sk_buff *skb)
1503 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1504 struct tid_info *t = cdev->lldi.tids;
1505 unsigned int stid = GET_TID(rpl);
1506 struct cxgbit_np *cnp = lookup_stid(t, stid);
1508 pr_debug("%s: cnp = %p; stid = %u; status = %d\n",
1509 __func__, cnp, stid, rpl->status);
1512 pr_info("%s stid %d lookup failure\n", __func__, stid);
1516 cxgbit_wake_up(&cnp->com.wr_wait, __func__, rpl->status);
1517 cxgbit_put_cnp(cnp);
1521 cxgbit_close_listsrv_rpl(struct cxgbit_device *cdev, struct sk_buff *skb)
1523 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1524 struct tid_info *t = cdev->lldi.tids;
1525 unsigned int stid = GET_TID(rpl);
1526 struct cxgbit_np *cnp = lookup_stid(t, stid);
1528 pr_debug("%s: cnp = %p; stid = %u; status = %d\n",
1529 __func__, cnp, stid, rpl->status);
1532 pr_info("%s stid %d lookup failure\n", __func__, stid);
1536 cxgbit_wake_up(&cnp->com.wr_wait, __func__, rpl->status);
1537 cxgbit_put_cnp(cnp);
1541 cxgbit_pass_establish(struct cxgbit_device *cdev, struct sk_buff *skb)
1543 struct cpl_pass_establish *req = cplhdr(skb);
1544 struct tid_info *t = cdev->lldi.tids;
1545 unsigned int tid = GET_TID(req);
1546 struct cxgbit_sock *csk;
1547 struct cxgbit_np *cnp;
1548 u16 tcp_opt = be16_to_cpu(req->tcp_opt);
1549 u32 snd_isn = be32_to_cpu(req->snd_isn);
1550 u32 rcv_isn = be32_to_cpu(req->rcv_isn);
1552 csk = lookup_tid(t, tid);
1553 if (unlikely(!csk)) {
1554 pr_err("can't find connection for tid %u.\n", tid);
1559 pr_debug("%s: csk %p; tid %u; cnp %p\n",
1560 __func__, csk, tid, cnp);
1562 csk->write_seq = snd_isn;
1563 csk->snd_una = snd_isn;
1564 csk->snd_nxt = snd_isn;
1566 csk->rcv_nxt = rcv_isn;
1568 if (csk->rcv_win > (RCV_BUFSIZ_M << 10))
1569 csk->rx_credits = (csk->rcv_win - (RCV_BUFSIZ_M << 10));
1571 csk->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt);
1572 cxgbit_set_emss(csk, tcp_opt);
1573 dst_confirm(csk->dst);
1574 csk->com.state = CSK_STATE_ESTABLISHED;
1575 spin_lock_bh(&cnp->np_accept_lock);
1576 list_add_tail(&csk->accept_node, &cnp->np_accept_list);
1577 spin_unlock_bh(&cnp->np_accept_lock);
1578 complete(&cnp->accept_comp);
1583 static void cxgbit_queue_rx_skb(struct cxgbit_sock *csk, struct sk_buff *skb)
1585 cxgbit_skcb_flags(skb) = 0;
1586 spin_lock_bh(&csk->rxq.lock);
1587 __skb_queue_tail(&csk->rxq, skb);
1588 spin_unlock_bh(&csk->rxq.lock);
1589 wake_up(&csk->waitq);
1592 static void cxgbit_peer_close(struct cxgbit_sock *csk, struct sk_buff *skb)
1594 pr_debug("%s: csk %p; tid %u; state %d\n",
1595 __func__, csk, csk->tid, csk->com.state);
1597 switch (csk->com.state) {
1598 case CSK_STATE_ESTABLISHED:
1599 csk->com.state = CSK_STATE_CLOSING;
1600 cxgbit_queue_rx_skb(csk, skb);
1602 case CSK_STATE_CLOSING:
1603 /* simultaneous close */
1604 csk->com.state = CSK_STATE_MORIBUND;
1606 case CSK_STATE_MORIBUND:
1607 csk->com.state = CSK_STATE_DEAD;
1608 cxgbit_put_csk(csk);
1610 case CSK_STATE_ABORTING:
1613 pr_info("%s: cpl_peer_close in bad state %d\n",
1614 __func__, csk->com.state);
1620 static void cxgbit_close_con_rpl(struct cxgbit_sock *csk, struct sk_buff *skb)
1622 pr_debug("%s: csk %p; tid %u; state %d\n",
1623 __func__, csk, csk->tid, csk->com.state);
1625 switch (csk->com.state) {
1626 case CSK_STATE_CLOSING:
1627 csk->com.state = CSK_STATE_MORIBUND;
1629 case CSK_STATE_MORIBUND:
1630 csk->com.state = CSK_STATE_DEAD;
1631 cxgbit_put_csk(csk);
1633 case CSK_STATE_ABORTING:
1634 case CSK_STATE_DEAD:
1637 pr_info("%s: cpl_close_con_rpl in bad state %d\n",
1638 __func__, csk->com.state);
1644 static void cxgbit_abort_req_rss(struct cxgbit_sock *csk, struct sk_buff *skb)
1646 struct cpl_abort_req_rss *hdr = cplhdr(skb);
1647 unsigned int tid = GET_TID(hdr);
1648 struct sk_buff *rpl_skb;
1649 bool release = false;
1650 bool wakeup_thread = false;
1651 u32 len = roundup(sizeof(struct cpl_abort_rpl), 16);
1653 pr_debug("%s: csk %p; tid %u; state %d\n",
1654 __func__, csk, tid, csk->com.state);
1656 if (cxgb_is_neg_adv(hdr->status)) {
1657 pr_err("%s: got neg advise %d on tid %u\n",
1658 __func__, hdr->status, tid);
1662 switch (csk->com.state) {
1663 case CSK_STATE_CONNECTING:
1664 case CSK_STATE_MORIBUND:
1665 csk->com.state = CSK_STATE_DEAD;
1668 case CSK_STATE_ESTABLISHED:
1669 csk->com.state = CSK_STATE_DEAD;
1670 wakeup_thread = true;
1672 case CSK_STATE_CLOSING:
1673 csk->com.state = CSK_STATE_DEAD;
1677 case CSK_STATE_ABORTING:
1680 pr_info("%s: cpl_abort_req_rss in bad state %d\n",
1681 __func__, csk->com.state);
1682 csk->com.state = CSK_STATE_DEAD;
1685 __skb_queue_purge(&csk->txq);
1687 if (!test_and_set_bit(CSK_TX_DATA_SENT, &csk->com.flags))
1688 cxgbit_send_tx_flowc_wr(csk);
1690 rpl_skb = __skb_dequeue(&csk->skbq);
1692 cxgb_mk_abort_rpl(rpl_skb, len, csk->tid, csk->txq_idx);
1693 cxgbit_ofld_send(csk->com.cdev, rpl_skb);
1695 if (wakeup_thread) {
1696 cxgbit_queue_rx_skb(csk, skb);
1701 cxgbit_put_csk(csk);
1706 static void cxgbit_abort_rpl_rss(struct cxgbit_sock *csk, struct sk_buff *skb)
1708 pr_debug("%s: csk %p; tid %u; state %d\n",
1709 __func__, csk, csk->tid, csk->com.state);
1711 switch (csk->com.state) {
1712 case CSK_STATE_ABORTING:
1713 csk->com.state = CSK_STATE_DEAD;
1714 cxgbit_put_csk(csk);
1717 pr_info("%s: cpl_abort_rpl_rss in state %d\n",
1718 __func__, csk->com.state);
1724 static bool cxgbit_credit_err(const struct cxgbit_sock *csk)
1726 const struct sk_buff *skb = csk->wr_pending_head;
1729 if (unlikely(csk->wr_cred > csk->wr_max_cred)) {
1730 pr_err("csk 0x%p, tid %u, credit %u > %u\n",
1731 csk, csk->tid, csk->wr_cred, csk->wr_max_cred);
1736 credit += (__force u32)skb->csum;
1737 skb = cxgbit_skcb_tx_wr_next(skb);
1740 if (unlikely((csk->wr_cred + credit) != csk->wr_max_cred)) {
1741 pr_err("csk 0x%p, tid %u, credit %u + %u != %u.\n",
1742 csk, csk->tid, csk->wr_cred,
1743 credit, csk->wr_max_cred);
1751 static void cxgbit_fw4_ack(struct cxgbit_sock *csk, struct sk_buff *skb)
1753 struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)cplhdr(skb);
1754 u32 credits = rpl->credits;
1755 u32 snd_una = ntohl(rpl->snd_una);
1757 csk->wr_cred += credits;
1758 if (csk->wr_una_cred > (csk->wr_max_cred - csk->wr_cred))
1759 csk->wr_una_cred = csk->wr_max_cred - csk->wr_cred;
1762 struct sk_buff *p = cxgbit_sock_peek_wr(csk);
1763 const u32 csum = (__force u32)p->csum;
1766 pr_err("csk 0x%p,%u, cr %u,%u+%u, empty.\n",
1767 csk, csk->tid, credits,
1768 csk->wr_cred, csk->wr_una_cred);
1772 if (unlikely(credits < csum)) {
1773 pr_warn("csk 0x%p,%u, cr %u,%u+%u, < %u.\n",
1775 credits, csk->wr_cred, csk->wr_una_cred,
1777 p->csum = (__force __wsum)(csum - credits);
1781 cxgbit_sock_dequeue_wr(csk);
1786 if (unlikely(cxgbit_credit_err(csk))) {
1787 cxgbit_queue_rx_skb(csk, skb);
1791 if (rpl->seq_vld & CPL_FW4_ACK_FLAGS_SEQVAL) {
1792 if (unlikely(before(snd_una, csk->snd_una))) {
1793 pr_warn("csk 0x%p,%u, snd_una %u/%u.",
1794 csk, csk->tid, snd_una,
1799 if (csk->snd_una != snd_una) {
1800 csk->snd_una = snd_una;
1801 dst_confirm(csk->dst);
1802 wake_up(&csk->ack_waitq);
1806 if (skb_queue_len(&csk->txq))
1807 cxgbit_push_tx_frames(csk);
1813 static void cxgbit_set_tcb_rpl(struct cxgbit_device *cdev, struct sk_buff *skb)
1815 struct cxgbit_sock *csk;
1816 struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1817 unsigned int tid = GET_TID(rpl);
1818 struct cxgb4_lld_info *lldi = &cdev->lldi;
1819 struct tid_info *t = lldi->tids;
1821 csk = lookup_tid(t, tid);
1823 pr_err("can't find connection for tid %u.\n", tid);
1825 cxgbit_wake_up(&csk->com.wr_wait, __func__, rpl->status);
1827 cxgbit_put_csk(csk);
1830 static void cxgbit_rx_data(struct cxgbit_device *cdev, struct sk_buff *skb)
1832 struct cxgbit_sock *csk;
1833 struct cpl_rx_data *cpl = cplhdr(skb);
1834 unsigned int tid = GET_TID(cpl);
1835 struct cxgb4_lld_info *lldi = &cdev->lldi;
1836 struct tid_info *t = lldi->tids;
1838 csk = lookup_tid(t, tid);
1839 if (unlikely(!csk)) {
1840 pr_err("can't find conn. for tid %u.\n", tid);
1844 cxgbit_queue_rx_skb(csk, skb);
1851 __cxgbit_process_rx_cpl(struct cxgbit_sock *csk, struct sk_buff *skb)
1853 spin_lock(&csk->lock);
1854 if (csk->lock_owner) {
1855 __skb_queue_tail(&csk->backlogq, skb);
1856 spin_unlock(&csk->lock);
1860 cxgbit_skcb_rx_backlog_fn(skb)(csk, skb);
1861 spin_unlock(&csk->lock);
1864 static void cxgbit_process_rx_cpl(struct cxgbit_sock *csk, struct sk_buff *skb)
1866 cxgbit_get_csk(csk);
1867 __cxgbit_process_rx_cpl(csk, skb);
1868 cxgbit_put_csk(csk);
1871 static void cxgbit_rx_cpl(struct cxgbit_device *cdev, struct sk_buff *skb)
1873 struct cxgbit_sock *csk;
1874 struct cpl_tx_data *cpl = cplhdr(skb);
1875 struct cxgb4_lld_info *lldi = &cdev->lldi;
1876 struct tid_info *t = lldi->tids;
1877 unsigned int tid = GET_TID(cpl);
1878 u8 opcode = cxgbit_skcb_rx_opcode(skb);
1883 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_fw4_ack;
1886 case CPL_PEER_CLOSE:
1887 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_peer_close;
1889 case CPL_CLOSE_CON_RPL:
1890 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_close_con_rpl;
1892 case CPL_ABORT_REQ_RSS:
1893 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_abort_req_rss;
1895 case CPL_ABORT_RPL_RSS:
1896 cxgbit_skcb_rx_backlog_fn(skb) = cxgbit_abort_rpl_rss;
1902 csk = lookup_tid(t, tid);
1903 if (unlikely(!csk)) {
1904 pr_err("can't find conn. for tid %u.\n", tid);
1909 cxgbit_process_rx_cpl(csk, skb);
1911 __cxgbit_process_rx_cpl(csk, skb);
1918 cxgbit_cplhandler_func cxgbit_cplhandlers[NUM_CPL_CMDS] = {
1919 [CPL_PASS_OPEN_RPL] = cxgbit_pass_open_rpl,
1920 [CPL_CLOSE_LISTSRV_RPL] = cxgbit_close_listsrv_rpl,
1921 [CPL_PASS_ACCEPT_REQ] = cxgbit_pass_accept_req,
1922 [CPL_PASS_ESTABLISH] = cxgbit_pass_establish,
1923 [CPL_SET_TCB_RPL] = cxgbit_set_tcb_rpl,
1924 [CPL_RX_DATA] = cxgbit_rx_data,
1925 [CPL_FW4_ACK] = cxgbit_rx_cpl,
1926 [CPL_PEER_CLOSE] = cxgbit_rx_cpl,
1927 [CPL_CLOSE_CON_RPL] = cxgbit_rx_cpl,
1928 [CPL_ABORT_REQ_RSS] = cxgbit_rx_cpl,
1929 [CPL_ABORT_RPL_RSS] = cxgbit_rx_cpl,