2 * libcxgbi.c: Chelsio common library for T3/T4 iSCSI driver.
4 * Copyright (c) 2010-2015 Chelsio Communications, Inc.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation.
10 * Written by: Karen Xie (kxie@chelsio.com)
11 * Written by: Rakesh Ranjan (rranjan@chelsio.com)
14 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
16 #include <linux/skbuff.h>
17 #include <linux/crypto.h>
18 #include <linux/scatterlist.h>
19 #include <linux/pci.h>
20 #include <scsi/scsi.h>
21 #include <scsi/scsi_cmnd.h>
22 #include <scsi/scsi_host.h>
23 #include <linux/if_vlan.h>
24 #include <linux/inet.h>
26 #include <net/route.h>
28 #include <net/ip6_route.h>
29 #include <net/addrconf.h>
31 #include <linux/inetdevice.h> /* ip_dev_find */
32 #include <linux/module.h>
35 static unsigned int dbg_level;
39 #define DRV_MODULE_NAME "libcxgbi"
40 #define DRV_MODULE_DESC "Chelsio iSCSI driver library"
41 #define DRV_MODULE_VERSION "0.9.1-ko"
42 #define DRV_MODULE_RELDATE "Apr. 2015"
44 static char version[] =
45 DRV_MODULE_DESC " " DRV_MODULE_NAME
46 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
48 MODULE_AUTHOR("Chelsio Communications, Inc.");
49 MODULE_DESCRIPTION(DRV_MODULE_DESC);
50 MODULE_VERSION(DRV_MODULE_VERSION);
51 MODULE_LICENSE("GPL");
53 module_param(dbg_level, uint, 0644);
54 MODULE_PARM_DESC(dbg_level, "libiscsi debug level (default=0)");
58 * cxgbi device management
59 * maintains a list of the cxgbi devices
61 static LIST_HEAD(cdev_list);
62 static DEFINE_MUTEX(cdev_mutex);
64 static LIST_HEAD(cdev_rcu_list);
65 static DEFINE_SPINLOCK(cdev_rcu_lock);
67 static inline void cxgbi_decode_sw_tag(u32 sw_tag, int *idx, int *age)
70 *age = sw_tag & 0x7FFF;
72 *idx = (sw_tag >> 16) & 0x7FFF;
75 int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base,
76 unsigned int max_conn)
78 struct cxgbi_ports_map *pmap = &cdev->pmap;
80 pmap->port_csk = cxgbi_alloc_big_mem(max_conn *
81 sizeof(struct cxgbi_sock *),
83 if (!pmap->port_csk) {
84 pr_warn("cdev 0x%p, portmap OOM %u.\n", cdev, max_conn);
88 pmap->max_connect = max_conn;
89 pmap->sport_base = base;
90 spin_lock_init(&pmap->lock);
93 EXPORT_SYMBOL_GPL(cxgbi_device_portmap_create);
95 void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev)
97 struct cxgbi_ports_map *pmap = &cdev->pmap;
98 struct cxgbi_sock *csk;
101 for (i = 0; i < pmap->max_connect; i++) {
102 if (pmap->port_csk[i]) {
103 csk = pmap->port_csk[i];
104 pmap->port_csk[i] = NULL;
105 log_debug(1 << CXGBI_DBG_SOCK,
106 "csk 0x%p, cdev 0x%p, offload down.\n",
108 spin_lock_bh(&csk->lock);
109 cxgbi_sock_set_flag(csk, CTPF_OFFLOAD_DOWN);
110 cxgbi_sock_closed(csk);
111 spin_unlock_bh(&csk->lock);
116 EXPORT_SYMBOL_GPL(cxgbi_device_portmap_cleanup);
118 static inline void cxgbi_device_destroy(struct cxgbi_device *cdev)
120 log_debug(1 << CXGBI_DBG_DEV,
121 "cdev 0x%p, p# %u.\n", cdev, cdev->nports);
122 cxgbi_hbas_remove(cdev);
123 cxgbi_device_portmap_cleanup(cdev);
124 cxgbi_ppm_release(cdev->cdev2ppm(cdev));
125 if (cdev->pmap.max_connect)
126 cxgbi_free_big_mem(cdev->pmap.port_csk);
130 struct cxgbi_device *cxgbi_device_register(unsigned int extra,
133 struct cxgbi_device *cdev;
135 cdev = kzalloc(sizeof(*cdev) + extra + nports *
136 (sizeof(struct cxgbi_hba *) +
137 sizeof(struct net_device *)),
140 pr_warn("nport %d, OOM.\n", nports);
143 cdev->ports = (struct net_device **)(cdev + 1);
144 cdev->hbas = (struct cxgbi_hba **)(((char*)cdev->ports) + nports *
145 sizeof(struct net_device *));
147 cdev->dd_data = ((char *)cdev->hbas) +
148 nports * sizeof(struct cxgbi_hba *);
149 spin_lock_init(&cdev->pmap.lock);
151 mutex_lock(&cdev_mutex);
152 list_add_tail(&cdev->list_head, &cdev_list);
153 mutex_unlock(&cdev_mutex);
155 spin_lock(&cdev_rcu_lock);
156 list_add_tail_rcu(&cdev->rcu_node, &cdev_rcu_list);
157 spin_unlock(&cdev_rcu_lock);
159 log_debug(1 << CXGBI_DBG_DEV,
160 "cdev 0x%p, p# %u.\n", cdev, nports);
163 EXPORT_SYMBOL_GPL(cxgbi_device_register);
165 void cxgbi_device_unregister(struct cxgbi_device *cdev)
167 log_debug(1 << CXGBI_DBG_DEV,
168 "cdev 0x%p, p# %u,%s.\n",
169 cdev, cdev->nports, cdev->nports ? cdev->ports[0]->name : "");
171 mutex_lock(&cdev_mutex);
172 list_del(&cdev->list_head);
173 mutex_unlock(&cdev_mutex);
175 spin_lock(&cdev_rcu_lock);
176 list_del_rcu(&cdev->rcu_node);
177 spin_unlock(&cdev_rcu_lock);
180 cxgbi_device_destroy(cdev);
182 EXPORT_SYMBOL_GPL(cxgbi_device_unregister);
184 void cxgbi_device_unregister_all(unsigned int flag)
186 struct cxgbi_device *cdev, *tmp;
188 mutex_lock(&cdev_mutex);
189 list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
190 if ((cdev->flags & flag) == flag) {
191 mutex_unlock(&cdev_mutex);
192 cxgbi_device_unregister(cdev);
193 mutex_lock(&cdev_mutex);
196 mutex_unlock(&cdev_mutex);
198 EXPORT_SYMBOL_GPL(cxgbi_device_unregister_all);
200 struct cxgbi_device *cxgbi_device_find_by_lldev(void *lldev)
202 struct cxgbi_device *cdev, *tmp;
204 mutex_lock(&cdev_mutex);
205 list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
206 if (cdev->lldev == lldev) {
207 mutex_unlock(&cdev_mutex);
211 mutex_unlock(&cdev_mutex);
213 log_debug(1 << CXGBI_DBG_DEV,
214 "lldev 0x%p, NO match found.\n", lldev);
217 EXPORT_SYMBOL_GPL(cxgbi_device_find_by_lldev);
219 struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev,
222 struct net_device *vdev = NULL;
223 struct cxgbi_device *cdev, *tmp;
226 if (is_vlan_dev(ndev)) {
228 ndev = vlan_dev_real_dev(ndev);
229 log_debug(1 << CXGBI_DBG_DEV,
230 "vlan dev %s -> %s.\n", vdev->name, ndev->name);
233 mutex_lock(&cdev_mutex);
234 list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
235 for (i = 0; i < cdev->nports; i++) {
236 if (ndev == cdev->ports[i]) {
237 cdev->hbas[i]->vdev = vdev;
238 mutex_unlock(&cdev_mutex);
245 mutex_unlock(&cdev_mutex);
246 log_debug(1 << CXGBI_DBG_DEV,
247 "ndev 0x%p, %s, NO match found.\n", ndev, ndev->name);
250 EXPORT_SYMBOL_GPL(cxgbi_device_find_by_netdev);
252 struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *ndev,
255 struct net_device *vdev = NULL;
256 struct cxgbi_device *cdev;
259 if (is_vlan_dev(ndev)) {
261 ndev = vlan_dev_real_dev(ndev);
262 pr_info("vlan dev %s -> %s.\n", vdev->name, ndev->name);
266 list_for_each_entry_rcu(cdev, &cdev_rcu_list, rcu_node) {
267 for (i = 0; i < cdev->nports; i++) {
268 if (ndev == cdev->ports[i]) {
269 cdev->hbas[i]->vdev = vdev;
279 log_debug(1 << CXGBI_DBG_DEV,
280 "ndev 0x%p, %s, NO match found.\n", ndev, ndev->name);
283 EXPORT_SYMBOL_GPL(cxgbi_device_find_by_netdev_rcu);
285 #if IS_ENABLED(CONFIG_IPV6)
286 static struct cxgbi_device *cxgbi_device_find_by_mac(struct net_device *ndev,
289 struct net_device *vdev = NULL;
290 struct cxgbi_device *cdev, *tmp;
293 if (is_vlan_dev(ndev)) {
295 ndev = vlan_dev_real_dev(ndev);
296 pr_info("vlan dev %s -> %s.\n", vdev->name, ndev->name);
299 mutex_lock(&cdev_mutex);
300 list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
301 for (i = 0; i < cdev->nports; i++) {
302 if (!memcmp(ndev->dev_addr, cdev->ports[i]->dev_addr,
304 cdev->hbas[i]->vdev = vdev;
305 mutex_unlock(&cdev_mutex);
312 mutex_unlock(&cdev_mutex);
313 log_debug(1 << CXGBI_DBG_DEV,
314 "ndev 0x%p, %s, NO match mac found.\n",
320 void cxgbi_hbas_remove(struct cxgbi_device *cdev)
323 struct cxgbi_hba *chba;
325 log_debug(1 << CXGBI_DBG_DEV,
326 "cdev 0x%p, p#%u.\n", cdev, cdev->nports);
328 for (i = 0; i < cdev->nports; i++) {
329 chba = cdev->hbas[i];
331 cdev->hbas[i] = NULL;
332 iscsi_host_remove(chba->shost);
333 pci_dev_put(cdev->pdev);
334 iscsi_host_free(chba->shost);
338 EXPORT_SYMBOL_GPL(cxgbi_hbas_remove);
340 int cxgbi_hbas_add(struct cxgbi_device *cdev, u64 max_lun,
341 unsigned int max_id, struct scsi_host_template *sht,
342 struct scsi_transport_template *stt)
344 struct cxgbi_hba *chba;
345 struct Scsi_Host *shost;
348 log_debug(1 << CXGBI_DBG_DEV, "cdev 0x%p, p#%u.\n", cdev, cdev->nports);
350 for (i = 0; i < cdev->nports; i++) {
351 shost = iscsi_host_alloc(sht, sizeof(*chba), 1);
353 pr_info("0x%p, p%d, %s, host alloc failed.\n",
354 cdev, i, cdev->ports[i]->name);
359 shost->transportt = stt;
360 shost->max_lun = max_lun;
361 shost->max_id = max_id;
362 shost->max_channel = 0;
363 shost->max_cmd_len = 16;
365 chba = iscsi_host_priv(shost);
367 chba->ndev = cdev->ports[i];
370 log_debug(1 << CXGBI_DBG_DEV,
371 "cdev 0x%p, p#%d %s: chba 0x%p.\n",
372 cdev, i, cdev->ports[i]->name, chba);
374 pci_dev_get(cdev->pdev);
375 err = iscsi_host_add(shost, &cdev->pdev->dev);
377 pr_info("cdev 0x%p, p#%d %s, host add failed.\n",
378 cdev, i, cdev->ports[i]->name);
379 pci_dev_put(cdev->pdev);
380 scsi_host_put(shost);
384 cdev->hbas[i] = chba;
390 cxgbi_hbas_remove(cdev);
393 EXPORT_SYMBOL_GPL(cxgbi_hbas_add);
398 * - source port management
399 * To find a free source port in the port allocation map we use a very simple
400 * rotor scheme to look for the next free port.
402 * If a source port has been specified make sure that it doesn't collide with
403 * our normal source port allocation map. If it's outside the range of our
404 * allocation/deallocation scheme just let them use it.
406 * If the source port is outside our allocation range, the caller is
407 * responsible for keeping track of their port usage.
410 static struct cxgbi_sock *find_sock_on_port(struct cxgbi_device *cdev,
411 unsigned char port_id)
413 struct cxgbi_ports_map *pmap = &cdev->pmap;
417 if (!pmap->max_connect || !pmap->used)
420 spin_lock_bh(&pmap->lock);
422 for (i = 0; used && i < pmap->max_connect; i++) {
423 struct cxgbi_sock *csk = pmap->port_csk[i];
426 if (csk->port_id == port_id) {
427 spin_unlock_bh(&pmap->lock);
433 spin_unlock_bh(&pmap->lock);
438 static int sock_get_port(struct cxgbi_sock *csk)
440 struct cxgbi_device *cdev = csk->cdev;
441 struct cxgbi_ports_map *pmap = &cdev->pmap;
446 if (!pmap->max_connect) {
447 pr_err("cdev 0x%p, p#%u %s, NO port map.\n",
448 cdev, csk->port_id, cdev->ports[csk->port_id]->name);
449 return -EADDRNOTAVAIL;
452 if (csk->csk_family == AF_INET)
453 port = &csk->saddr.sin_port;
455 port = &csk->saddr6.sin6_port;
458 pr_err("source port NON-ZERO %u.\n",
463 spin_lock_bh(&pmap->lock);
464 if (pmap->used >= pmap->max_connect) {
465 spin_unlock_bh(&pmap->lock);
466 pr_info("cdev 0x%p, p#%u %s, ALL ports used.\n",
467 cdev, csk->port_id, cdev->ports[csk->port_id]->name);
468 return -EADDRNOTAVAIL;
471 start = idx = pmap->next;
473 if (++idx >= pmap->max_connect)
475 if (!pmap->port_csk[idx]) {
477 *port = htons(pmap->sport_base + idx);
479 pmap->port_csk[idx] = csk;
480 spin_unlock_bh(&pmap->lock);
482 log_debug(1 << CXGBI_DBG_SOCK,
483 "cdev 0x%p, p#%u %s, p %u, %u.\n",
485 cdev->ports[csk->port_id]->name,
486 pmap->sport_base + idx, pmap->next);
489 } while (idx != start);
490 spin_unlock_bh(&pmap->lock);
492 /* should not happen */
493 pr_warn("cdev 0x%p, p#%u %s, next %u?\n",
494 cdev, csk->port_id, cdev->ports[csk->port_id]->name,
496 return -EADDRNOTAVAIL;
499 static void sock_put_port(struct cxgbi_sock *csk)
501 struct cxgbi_device *cdev = csk->cdev;
502 struct cxgbi_ports_map *pmap = &cdev->pmap;
505 if (csk->csk_family == AF_INET)
506 port = &csk->saddr.sin_port;
508 port = &csk->saddr6.sin6_port;
511 int idx = ntohs(*port) - pmap->sport_base;
514 if (idx < 0 || idx >= pmap->max_connect) {
515 pr_err("cdev 0x%p, p#%u %s, port %u OOR.\n",
517 cdev->ports[csk->port_id]->name,
522 spin_lock_bh(&pmap->lock);
523 pmap->port_csk[idx] = NULL;
525 spin_unlock_bh(&pmap->lock);
527 log_debug(1 << CXGBI_DBG_SOCK,
528 "cdev 0x%p, p#%u %s, release %u.\n",
529 cdev, csk->port_id, cdev->ports[csk->port_id]->name,
530 pmap->sport_base + idx);
537 * iscsi tcp connection
539 void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *csk)
541 if (csk->cpl_close) {
542 kfree_skb(csk->cpl_close);
543 csk->cpl_close = NULL;
545 if (csk->cpl_abort_req) {
546 kfree_skb(csk->cpl_abort_req);
547 csk->cpl_abort_req = NULL;
549 if (csk->cpl_abort_rpl) {
550 kfree_skb(csk->cpl_abort_rpl);
551 csk->cpl_abort_rpl = NULL;
554 EXPORT_SYMBOL_GPL(cxgbi_sock_free_cpl_skbs);
556 static struct cxgbi_sock *cxgbi_sock_create(struct cxgbi_device *cdev)
558 struct cxgbi_sock *csk = kzalloc(sizeof(*csk), GFP_NOIO);
561 pr_info("alloc csk %zu failed.\n", sizeof(*csk));
565 if (cdev->csk_alloc_cpls(csk) < 0) {
566 pr_info("csk 0x%p, alloc cpls failed.\n", csk);
571 spin_lock_init(&csk->lock);
572 kref_init(&csk->refcnt);
573 skb_queue_head_init(&csk->receive_queue);
574 skb_queue_head_init(&csk->write_queue);
575 setup_timer(&csk->retry_timer, NULL, (unsigned long)csk);
576 rwlock_init(&csk->callback_lock);
579 cxgbi_sock_set_state(csk, CTP_CLOSED);
581 log_debug(1 << CXGBI_DBG_SOCK, "cdev 0x%p, new csk 0x%p.\n", cdev, csk);
586 static struct rtable *find_route_ipv4(struct flowi4 *fl4,
587 __be32 saddr, __be32 daddr,
588 __be16 sport, __be16 dport, u8 tos)
592 rt = ip_route_output_ports(&init_net, fl4, NULL, daddr, saddr,
593 dport, sport, IPPROTO_TCP, tos, 0);
600 static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr)
602 struct sockaddr_in *daddr = (struct sockaddr_in *)dst_addr;
603 struct dst_entry *dst;
604 struct net_device *ndev;
605 struct cxgbi_device *cdev;
606 struct rtable *rt = NULL;
609 struct cxgbi_sock *csk = NULL;
610 unsigned int mtu = 0;
614 rt = find_route_ipv4(&fl4, 0, daddr->sin_addr.s_addr, 0, daddr->sin_port, 0);
616 pr_info("no route to ipv4 0x%x, port %u.\n",
617 be32_to_cpu(daddr->sin_addr.s_addr),
618 be16_to_cpu(daddr->sin_port));
623 n = dst_neigh_lookup(dst, &daddr->sin_addr.s_addr);
630 if (rt->rt_flags & (RTCF_MULTICAST | RTCF_BROADCAST)) {
631 pr_info("multi-cast route %pI4, port %u, dev %s.\n",
632 &daddr->sin_addr.s_addr, ntohs(daddr->sin_port),
638 if (ndev->flags & IFF_LOOPBACK) {
639 ndev = ip_dev_find(&init_net, daddr->sin_addr.s_addr);
641 pr_info("rt dev %s, loopback -> %s, mtu %u.\n",
642 n->dev->name, ndev->name, mtu);
645 if (!(ndev->flags & IFF_UP) || !netif_carrier_ok(ndev)) {
646 pr_info("%s interface not up.\n", ndev->name);
651 cdev = cxgbi_device_find_by_netdev(ndev, &port);
653 pr_info("dst %pI4, %s, NOT cxgbi device.\n",
654 &daddr->sin_addr.s_addr, ndev->name);
658 log_debug(1 << CXGBI_DBG_SOCK,
659 "route to %pI4 :%u, ndev p#%d,%s, cdev 0x%p.\n",
660 &daddr->sin_addr.s_addr, ntohs(daddr->sin_port),
661 port, ndev->name, cdev);
663 csk = cxgbi_sock_create(cdev);
673 csk->csk_family = AF_INET;
674 csk->daddr.sin_addr.s_addr = daddr->sin_addr.s_addr;
675 csk->daddr.sin_port = daddr->sin_port;
676 csk->daddr.sin_family = daddr->sin_family;
677 csk->saddr.sin_family = daddr->sin_family;
678 csk->saddr.sin_addr.s_addr = fl4.saddr;
689 cxgbi_sock_closed(csk);
694 #if IS_ENABLED(CONFIG_IPV6)
695 static struct rt6_info *find_route_ipv6(const struct in6_addr *saddr,
696 const struct in6_addr *daddr)
700 memset(&fl, 0, sizeof(fl));
702 memcpy(&fl.saddr, saddr, sizeof(struct in6_addr));
704 memcpy(&fl.daddr, daddr, sizeof(struct in6_addr));
705 return (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl);
708 static struct cxgbi_sock *cxgbi_check_route6(struct sockaddr *dst_addr)
710 struct sockaddr_in6 *daddr6 = (struct sockaddr_in6 *)dst_addr;
711 struct dst_entry *dst;
712 struct net_device *ndev;
713 struct cxgbi_device *cdev;
714 struct rt6_info *rt = NULL;
716 struct in6_addr pref_saddr;
717 struct cxgbi_sock *csk = NULL;
718 unsigned int mtu = 0;
722 rt = find_route_ipv6(NULL, &daddr6->sin6_addr);
725 pr_info("no route to ipv6 %pI6 port %u\n",
726 daddr6->sin6_addr.s6_addr,
727 be16_to_cpu(daddr6->sin6_port));
734 n = dst_neigh_lookup(dst, &daddr6->sin6_addr);
737 pr_info("%pI6, port %u, dst no neighbour.\n",
738 daddr6->sin6_addr.s6_addr,
739 be16_to_cpu(daddr6->sin6_port));
745 if (!(ndev->flags & IFF_UP) || !netif_carrier_ok(ndev)) {
746 pr_info("%s interface not up.\n", ndev->name);
751 if (ipv6_addr_is_multicast(&daddr6->sin6_addr)) {
752 pr_info("multi-cast route %pI6 port %u, dev %s.\n",
753 daddr6->sin6_addr.s6_addr,
754 ntohs(daddr6->sin6_port), ndev->name);
759 cdev = cxgbi_device_find_by_netdev(ndev, &port);
761 cdev = cxgbi_device_find_by_mac(ndev, &port);
763 pr_info("dst %pI6 %s, NOT cxgbi device.\n",
764 daddr6->sin6_addr.s6_addr, ndev->name);
768 log_debug(1 << CXGBI_DBG_SOCK,
769 "route to %pI6 :%u, ndev p#%d,%s, cdev 0x%p.\n",
770 daddr6->sin6_addr.s6_addr, ntohs(daddr6->sin6_port), port,
773 csk = cxgbi_sock_create(cdev);
783 if (ipv6_addr_any(&rt->rt6i_prefsrc.addr)) {
784 struct inet6_dev *idev = ip6_dst_idev((struct dst_entry *)rt);
786 err = ipv6_dev_get_saddr(&init_net, idev ? idev->dev : NULL,
787 &daddr6->sin6_addr, 0, &pref_saddr);
789 pr_info("failed to get source address to reach %pI6\n",
794 pref_saddr = rt->rt6i_prefsrc.addr;
797 csk->csk_family = AF_INET6;
798 csk->daddr6.sin6_addr = daddr6->sin6_addr;
799 csk->daddr6.sin6_port = daddr6->sin6_port;
800 csk->daddr6.sin6_family = daddr6->sin6_family;
801 csk->saddr6.sin6_family = daddr6->sin6_family;
802 csk->saddr6.sin6_addr = pref_saddr;
813 cxgbi_sock_closed(csk);
817 #endif /* IS_ENABLED(CONFIG_IPV6) */
819 void cxgbi_sock_established(struct cxgbi_sock *csk, unsigned int snd_isn,
822 csk->write_seq = csk->snd_nxt = csk->snd_una = snd_isn;
823 dst_confirm(csk->dst);
825 cxgbi_sock_set_state(csk, CTP_ESTABLISHED);
827 EXPORT_SYMBOL_GPL(cxgbi_sock_established);
829 static void cxgbi_inform_iscsi_conn_closing(struct cxgbi_sock *csk)
831 log_debug(1 << CXGBI_DBG_SOCK,
832 "csk 0x%p, state %u, flags 0x%lx, conn 0x%p.\n",
833 csk, csk->state, csk->flags, csk->user_data);
835 if (csk->state != CTP_ESTABLISHED) {
836 read_lock_bh(&csk->callback_lock);
838 iscsi_conn_failure(csk->user_data,
839 ISCSI_ERR_TCP_CONN_CLOSE);
840 read_unlock_bh(&csk->callback_lock);
844 void cxgbi_sock_closed(struct cxgbi_sock *csk)
846 log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
847 csk, (csk)->state, (csk)->flags, (csk)->tid);
848 cxgbi_sock_set_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED);
849 if (csk->state == CTP_ACTIVE_OPEN || csk->state == CTP_CLOSED)
851 if (csk->saddr.sin_port)
854 dst_release(csk->dst);
855 csk->cdev->csk_release_offload_resources(csk);
856 cxgbi_sock_set_state(csk, CTP_CLOSED);
857 cxgbi_inform_iscsi_conn_closing(csk);
860 EXPORT_SYMBOL_GPL(cxgbi_sock_closed);
862 static void need_active_close(struct cxgbi_sock *csk)
867 log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
868 csk, (csk)->state, (csk)->flags, (csk)->tid);
869 spin_lock_bh(&csk->lock);
871 dst_confirm(csk->dst);
872 data_lost = skb_queue_len(&csk->receive_queue);
873 __skb_queue_purge(&csk->receive_queue);
875 if (csk->state == CTP_ACTIVE_OPEN)
876 cxgbi_sock_set_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED);
877 else if (csk->state == CTP_ESTABLISHED) {
879 cxgbi_sock_set_state(csk, CTP_ACTIVE_CLOSE);
880 } else if (csk->state == CTP_PASSIVE_CLOSE) {
882 cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_2);
886 if (!cxgbi_sock_flag(csk, CTPF_LOGOUT_RSP_RCVD) ||
888 csk->cdev->csk_send_abort_req(csk);
890 csk->cdev->csk_send_close_req(csk);
893 spin_unlock_bh(&csk->lock);
896 void cxgbi_sock_fail_act_open(struct cxgbi_sock *csk, int errno)
898 pr_info("csk 0x%p,%u,%lx, %pI4:%u-%pI4:%u, err %d.\n",
899 csk, csk->state, csk->flags,
900 &csk->saddr.sin_addr.s_addr, csk->saddr.sin_port,
901 &csk->daddr.sin_addr.s_addr, csk->daddr.sin_port,
904 cxgbi_sock_set_state(csk, CTP_CONNECTING);
906 cxgbi_sock_closed(csk);
908 EXPORT_SYMBOL_GPL(cxgbi_sock_fail_act_open);
910 void cxgbi_sock_act_open_req_arp_failure(void *handle, struct sk_buff *skb)
912 struct cxgbi_sock *csk = (struct cxgbi_sock *)skb->sk;
913 struct module *owner = csk->cdev->owner;
915 log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
916 csk, (csk)->state, (csk)->flags, (csk)->tid);
918 spin_lock_bh(&csk->lock);
919 if (csk->state == CTP_ACTIVE_OPEN)
920 cxgbi_sock_fail_act_open(csk, -EHOSTUNREACH);
921 spin_unlock_bh(&csk->lock);
927 EXPORT_SYMBOL_GPL(cxgbi_sock_act_open_req_arp_failure);
929 void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *csk)
932 spin_lock_bh(&csk->lock);
934 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_RCVD);
935 if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
936 cxgbi_sock_clear_flag(csk, CTPF_ABORT_RPL_PENDING);
937 if (cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD))
938 pr_err("csk 0x%p,%u,0x%lx,%u,ABT_RPL_RSS.\n",
939 csk, csk->state, csk->flags, csk->tid);
940 cxgbi_sock_closed(csk);
943 spin_unlock_bh(&csk->lock);
946 EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_abort_rpl);
948 void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *csk)
950 log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
951 csk, (csk)->state, (csk)->flags, (csk)->tid);
953 spin_lock_bh(&csk->lock);
955 if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING))
958 switch (csk->state) {
959 case CTP_ESTABLISHED:
960 cxgbi_sock_set_state(csk, CTP_PASSIVE_CLOSE);
962 case CTP_ACTIVE_CLOSE:
963 cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_2);
965 case CTP_CLOSE_WAIT_1:
966 cxgbi_sock_closed(csk);
971 pr_err("csk 0x%p,%u,0x%lx,%u, bad state.\n",
972 csk, csk->state, csk->flags, csk->tid);
974 cxgbi_inform_iscsi_conn_closing(csk);
976 spin_unlock_bh(&csk->lock);
979 EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_peer_close);
981 void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *csk, u32 snd_nxt)
983 log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
984 csk, (csk)->state, (csk)->flags, (csk)->tid);
986 spin_lock_bh(&csk->lock);
988 csk->snd_una = snd_nxt - 1;
989 if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING))
992 switch (csk->state) {
993 case CTP_ACTIVE_CLOSE:
994 cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_1);
996 case CTP_CLOSE_WAIT_1:
997 case CTP_CLOSE_WAIT_2:
998 cxgbi_sock_closed(csk);
1003 pr_err("csk 0x%p,%u,0x%lx,%u, bad state.\n",
1004 csk, csk->state, csk->flags, csk->tid);
1007 spin_unlock_bh(&csk->lock);
1008 cxgbi_sock_put(csk);
1010 EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_close_conn_rpl);
1012 void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *csk, unsigned int credits,
1013 unsigned int snd_una, int seq_chk)
1015 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1016 "csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, snd_una %u,%d.\n",
1017 csk, csk->state, csk->flags, csk->tid, credits,
1018 csk->wr_cred, csk->wr_una_cred, snd_una, seq_chk);
1020 spin_lock_bh(&csk->lock);
1022 csk->wr_cred += credits;
1023 if (csk->wr_una_cred > csk->wr_max_cred - csk->wr_cred)
1024 csk->wr_una_cred = csk->wr_max_cred - csk->wr_cred;
1027 struct sk_buff *p = cxgbi_sock_peek_wr(csk);
1030 pr_err("csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, empty.\n",
1031 csk, csk->state, csk->flags, csk->tid, credits,
1032 csk->wr_cred, csk->wr_una_cred);
1036 if (unlikely(credits < p->csum)) {
1037 pr_warn("csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, < %u.\n",
1038 csk, csk->state, csk->flags, csk->tid,
1039 credits, csk->wr_cred, csk->wr_una_cred,
1044 cxgbi_sock_dequeue_wr(csk);
1050 cxgbi_sock_check_wr_invariants(csk);
1053 if (unlikely(before(snd_una, csk->snd_una))) {
1054 pr_warn("csk 0x%p,%u,0x%lx,%u, snd_una %u/%u.",
1055 csk, csk->state, csk->flags, csk->tid, snd_una,
1060 if (csk->snd_una != snd_una) {
1061 csk->snd_una = snd_una;
1062 dst_confirm(csk->dst);
1066 if (skb_queue_len(&csk->write_queue)) {
1067 if (csk->cdev->csk_push_tx_frames(csk, 0))
1068 cxgbi_conn_tx_open(csk);
1070 cxgbi_conn_tx_open(csk);
1072 spin_unlock_bh(&csk->lock);
1074 EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_wr_ack);
1076 static unsigned int cxgbi_sock_find_best_mtu(struct cxgbi_sock *csk,
1081 while (i < csk->cdev->nmtus - 1 && csk->cdev->mtus[i + 1] <= mtu)
1087 unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *csk, unsigned int pmtu)
1090 struct dst_entry *dst = csk->dst;
1092 csk->advmss = dst_metric_advmss(dst);
1094 if (csk->advmss > pmtu - 40)
1095 csk->advmss = pmtu - 40;
1096 if (csk->advmss < csk->cdev->mtus[0] - 40)
1097 csk->advmss = csk->cdev->mtus[0] - 40;
1098 idx = cxgbi_sock_find_best_mtu(csk, csk->advmss + 40);
1102 EXPORT_SYMBOL_GPL(cxgbi_sock_select_mss);
1104 void cxgbi_sock_skb_entail(struct cxgbi_sock *csk, struct sk_buff *skb)
1106 cxgbi_skcb_tcp_seq(skb) = csk->write_seq;
1107 __skb_queue_tail(&csk->write_queue, skb);
1109 EXPORT_SYMBOL_GPL(cxgbi_sock_skb_entail);
1111 void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *csk)
1113 struct sk_buff *skb;
1115 while ((skb = cxgbi_sock_dequeue_wr(csk)) != NULL)
1118 EXPORT_SYMBOL_GPL(cxgbi_sock_purge_wr_queue);
1120 void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *csk)
1122 int pending = cxgbi_sock_count_pending_wrs(csk);
1124 if (unlikely(csk->wr_cred + pending != csk->wr_max_cred))
1125 pr_err("csk 0x%p, tid %u, credit %u + %u != %u.\n",
1126 csk, csk->tid, csk->wr_cred, pending, csk->wr_max_cred);
1128 EXPORT_SYMBOL_GPL(cxgbi_sock_check_wr_invariants);
1130 static int cxgbi_sock_send_pdus(struct cxgbi_sock *csk, struct sk_buff *skb)
1132 struct cxgbi_device *cdev = csk->cdev;
1133 struct sk_buff *next;
1134 int err, copied = 0;
1136 spin_lock_bh(&csk->lock);
1138 if (csk->state != CTP_ESTABLISHED) {
1139 log_debug(1 << CXGBI_DBG_PDU_TX,
1140 "csk 0x%p,%u,0x%lx,%u, EAGAIN.\n",
1141 csk, csk->state, csk->flags, csk->tid);
1147 log_debug(1 << CXGBI_DBG_PDU_TX,
1148 "csk 0x%p,%u,0x%lx,%u, EPIPE %d.\n",
1149 csk, csk->state, csk->flags, csk->tid, csk->err);
1154 if (csk->write_seq - csk->snd_una >= csk->snd_win) {
1155 log_debug(1 << CXGBI_DBG_PDU_TX,
1156 "csk 0x%p,%u,0x%lx,%u, FULL %u-%u >= %u.\n",
1157 csk, csk->state, csk->flags, csk->tid, csk->write_seq,
1158 csk->snd_una, csk->snd_win);
1164 int frags = skb_shinfo(skb)->nr_frags +
1165 (skb->len != skb->data_len);
1167 if (unlikely(skb_headroom(skb) < cdev->skb_tx_rsvd)) {
1168 pr_err("csk 0x%p, skb head %u < %u.\n",
1169 csk, skb_headroom(skb), cdev->skb_tx_rsvd);
1174 if (frags >= SKB_WR_LIST_SIZE) {
1175 pr_err("csk 0x%p, frags %d, %u,%u >%u.\n",
1176 csk, skb_shinfo(skb)->nr_frags, skb->len,
1177 skb->data_len, (uint)(SKB_WR_LIST_SIZE));
1184 cxgbi_skcb_set_flag(skb, SKCBF_TX_NEED_HDR);
1185 cxgbi_sock_skb_entail(csk, skb);
1187 csk->write_seq += skb->len +
1188 cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
1192 if (likely(skb_queue_len(&csk->write_queue)))
1193 cdev->csk_push_tx_frames(csk, 1);
1195 spin_unlock_bh(&csk->lock);
1199 if (copied == 0 && err == -EPIPE)
1200 copied = csk->err ? csk->err : -EPIPE;
1207 scmd_get_params(struct scsi_cmnd *sc, struct scatterlist **sgl,
1208 unsigned int *sgcnt, unsigned int *dlen,
1211 struct scsi_data_buffer *sdb = prot ? scsi_prot(sc) : scsi_out(sc);
1213 *sgl = sdb->table.sgl;
1214 *sgcnt = sdb->table.nents;
1215 *dlen = sdb->length;
1216 /* Caution: for protection sdb, sdb->length is invalid */
1219 void cxgbi_ddp_set_one_ppod(struct cxgbi_pagepod *ppod,
1220 struct cxgbi_task_tag_info *ttinfo,
1221 struct scatterlist **sg_pp, unsigned int *sg_off)
1223 struct scatterlist *sg = sg_pp ? *sg_pp : NULL;
1224 unsigned int offset = sg_off ? *sg_off : 0;
1225 dma_addr_t addr = 0UL;
1226 unsigned int len = 0;
1229 memcpy(ppod, &ttinfo->hdr, sizeof(struct cxgbi_pagepod_hdr));
1232 addr = sg_dma_address(sg);
1233 len = sg_dma_len(sg);
1236 for (i = 0; i < PPOD_PAGES_MAX; i++) {
1238 ppod->addr[i] = cpu_to_be64(addr + offset);
1239 offset += PAGE_SIZE;
1240 if (offset == (len + sg->offset)) {
1244 addr = sg_dma_address(sg);
1245 len = sg_dma_len(sg);
1249 ppod->addr[i] = 0ULL;
1254 * the fifth address needs to be repeated in the next ppod, so do
1262 if (offset == len) {
1266 addr = sg_dma_address(sg);
1267 len = sg_dma_len(sg);
1270 ppod->addr[i] = sg ? cpu_to_be64(addr + offset) : 0ULL;
1272 EXPORT_SYMBOL_GPL(cxgbi_ddp_set_one_ppod);
1275 * APIs interacting with open-iscsi libraries
1278 static unsigned char padding[4];
1280 void cxgbi_ddp_ppm_setup(void **ppm_pp, struct cxgbi_device *cdev,
1281 struct cxgbi_tag_format *tformat, unsigned int ppmax,
1282 unsigned int llimit, unsigned int start,
1283 unsigned int rsvd_factor)
1285 int err = cxgbi_ppm_init(ppm_pp, cdev->ports[0], cdev->pdev,
1286 cdev->lldev, tformat, ppmax, llimit, start,
1290 struct cxgbi_ppm *ppm = (struct cxgbi_ppm *)(*ppm_pp);
1292 if (ppm->ppmax < 1024 ||
1293 ppm->tformat.pgsz_idx_dflt >= DDP_PGIDX_MAX)
1294 cdev->flags |= CXGBI_FLAG_DDP_OFF;
1297 cdev->flags |= CXGBI_FLAG_DDP_OFF;
1300 EXPORT_SYMBOL_GPL(cxgbi_ddp_ppm_setup);
1302 static int cxgbi_ddp_sgl_check(struct scatterlist *sgl, int nents)
1305 int last_sgidx = nents - 1;
1306 struct scatterlist *sg = sgl;
1308 for (i = 0; i < nents; i++, sg = sg_next(sg)) {
1309 unsigned int len = sg->length + sg->offset;
1311 if ((sg->offset & 0x3) || (i && sg->offset) ||
1312 ((i != last_sgidx) && len != PAGE_SIZE)) {
1313 log_debug(1 << CXGBI_DBG_DDP,
1314 "sg %u/%u, %u,%u, not aligned.\n",
1315 i, nents, sg->offset, sg->length);
1324 static int cxgbi_ddp_reserve(struct cxgbi_conn *cconn,
1325 struct cxgbi_task_data *tdata, u32 sw_tag,
1326 unsigned int xferlen)
1328 struct cxgbi_sock *csk = cconn->cep->csk;
1329 struct cxgbi_device *cdev = csk->cdev;
1330 struct cxgbi_ppm *ppm = cdev->cdev2ppm(cdev);
1331 struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo;
1332 struct scatterlist *sgl = ttinfo->sgl;
1333 unsigned int sgcnt = ttinfo->nents;
1334 unsigned int sg_offset = sgl->offset;
1337 if (cdev->flags & CXGBI_FLAG_DDP_OFF) {
1338 log_debug(1 << CXGBI_DBG_DDP,
1339 "cdev 0x%p DDP off.\n", cdev);
1343 if (!ppm || xferlen < DDP_THRESHOLD || !sgcnt ||
1344 ppm->tformat.pgsz_idx_dflt >= DDP_PGIDX_MAX) {
1345 log_debug(1 << CXGBI_DBG_DDP,
1346 "ppm 0x%p, pgidx %u, xfer %u, sgcnt %u, NO ddp.\n",
1347 ppm, ppm ? ppm->tformat.pgsz_idx_dflt : DDP_PGIDX_MAX,
1348 xferlen, ttinfo->nents);
1352 /* make sure the buffer is suitable for ddp */
1353 if (cxgbi_ddp_sgl_check(sgl, sgcnt) < 0)
1356 ttinfo->nr_pages = (xferlen + sgl->offset + (1 << PAGE_SHIFT) - 1) >>
1360 * the ddp tag will be used for the itt in the outgoing pdu,
1361 * the itt genrated by libiscsi is saved in the ppm and can be
1362 * retrieved via the ddp tag
1364 err = cxgbi_ppm_ppods_reserve(ppm, ttinfo->nr_pages, 0, &ttinfo->idx,
1365 &ttinfo->tag, (unsigned long)sw_tag);
1370 ttinfo->npods = err;
1372 /* setup dma from scsi command sgl */
1374 err = dma_map_sg(&ppm->pdev->dev, sgl, sgcnt, DMA_FROM_DEVICE);
1375 sgl->offset = sg_offset;
1377 pr_info("%s: 0x%x, xfer %u, sgl %u dma mapping err.\n",
1378 __func__, sw_tag, xferlen, sgcnt);
1381 if (err != ttinfo->nr_pages) {
1382 log_debug(1 << CXGBI_DBG_DDP,
1383 "%s: sw tag 0x%x, xfer %u, sgl %u, dma count %d.\n",
1384 __func__, sw_tag, xferlen, sgcnt, err);
1387 ttinfo->flags |= CXGBI_PPOD_INFO_FLAG_MAPPED;
1388 ttinfo->cid = csk->port_id;
1390 cxgbi_ppm_make_ppod_hdr(ppm, ttinfo->tag, csk->tid, sgl->offset,
1391 xferlen, &ttinfo->hdr);
1393 if (cdev->flags & CXGBI_FLAG_USE_PPOD_OFLDQ) {
1394 /* write ppod from xmit_pdu (of iscsi_scsi_command pdu) */
1395 ttinfo->flags |= CXGBI_PPOD_INFO_FLAG_VALID;
1397 /* write ppod from control queue now */
1398 err = cdev->csk_ddp_set_map(ppm, csk, ttinfo);
1406 cxgbi_ppm_ppod_release(ppm, ttinfo->idx);
1408 if (ttinfo->flags & CXGBI_PPOD_INFO_FLAG_MAPPED) {
1409 ttinfo->flags &= ~CXGBI_PPOD_INFO_FLAG_MAPPED;
1410 dma_unmap_sg(&ppm->pdev->dev, sgl, sgcnt, DMA_FROM_DEVICE);
1415 static void task_release_itt(struct iscsi_task *task, itt_t hdr_itt)
1417 struct scsi_cmnd *sc = task->sc;
1418 struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
1419 struct cxgbi_conn *cconn = tcp_conn->dd_data;
1420 struct cxgbi_device *cdev = cconn->chba->cdev;
1421 struct cxgbi_ppm *ppm = cdev->cdev2ppm(cdev);
1422 u32 tag = ntohl((__force u32)hdr_itt);
1424 log_debug(1 << CXGBI_DBG_DDP,
1425 "cdev 0x%p, task 0x%p, release tag 0x%x.\n",
1428 (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE) &&
1429 cxgbi_ppm_is_ddp_tag(ppm, tag)) {
1430 struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
1431 struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo;
1433 if (!(cdev->flags & CXGBI_FLAG_USE_PPOD_OFLDQ))
1434 cdev->csk_ddp_clear_map(cdev, ppm, ttinfo);
1435 cxgbi_ppm_ppod_release(ppm, ttinfo->idx);
1436 dma_unmap_sg(&ppm->pdev->dev, ttinfo->sgl, ttinfo->nents,
1441 static inline u32 cxgbi_build_sw_tag(u32 idx, u32 age)
1443 /* assume idx and age both are < 0x7FFF (32767) */
1444 return (idx << 16) | age;
1447 static int task_reserve_itt(struct iscsi_task *task, itt_t *hdr_itt)
1449 struct scsi_cmnd *sc = task->sc;
1450 struct iscsi_conn *conn = task->conn;
1451 struct iscsi_session *sess = conn->session;
1452 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
1453 struct cxgbi_conn *cconn = tcp_conn->dd_data;
1454 struct cxgbi_device *cdev = cconn->chba->cdev;
1455 struct cxgbi_ppm *ppm = cdev->cdev2ppm(cdev);
1456 u32 sw_tag = cxgbi_build_sw_tag(task->itt, sess->age);
1461 (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE)
1463 struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
1464 struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo;
1466 scmd_get_params(sc, &ttinfo->sgl, &ttinfo->nents,
1468 err = cxgbi_ddp_reserve(cconn, tdata, sw_tag, tdata->dlen);
1472 log_debug(1 << CXGBI_DBG_DDP,
1473 "csk 0x%p, R task 0x%p, %u,%u, no ddp.\n",
1474 cconn->cep->csk, task, tdata->dlen,
1479 err = cxgbi_ppm_make_non_ddp_tag(ppm, sw_tag, &tag);
1483 /* the itt need to sent in big-endian order */
1484 *hdr_itt = (__force itt_t)htonl(tag);
1486 log_debug(1 << CXGBI_DBG_DDP,
1487 "cdev 0x%p, task 0x%p, 0x%x(0x%x,0x%x)->0x%x/0x%x.\n",
1488 cdev, task, sw_tag, task->itt, sess->age, tag, *hdr_itt);
1492 void cxgbi_parse_pdu_itt(struct iscsi_conn *conn, itt_t itt, int *idx, int *age)
1494 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
1495 struct cxgbi_conn *cconn = tcp_conn->dd_data;
1496 struct cxgbi_device *cdev = cconn->chba->cdev;
1497 struct cxgbi_ppm *ppm = cdev->cdev2ppm(cdev);
1498 u32 tag = ntohl((__force u32)itt);
1502 if (cxgbi_ppm_is_ddp_tag(ppm, tag))
1503 sw_bits = cxgbi_ppm_get_tag_caller_data(ppm, tag);
1505 sw_bits = cxgbi_ppm_decode_non_ddp_tag(ppm, tag);
1510 cxgbi_decode_sw_tag(sw_bits, idx, age);
1511 log_debug(1 << CXGBI_DBG_DDP,
1512 "cdev 0x%p, tag 0x%x/0x%x, -> 0x%x(0x%x,0x%x).\n",
1513 cdev, tag, itt, sw_bits, idx ? *idx : 0xFFFFF,
1516 EXPORT_SYMBOL_GPL(cxgbi_parse_pdu_itt);
1518 void cxgbi_conn_tx_open(struct cxgbi_sock *csk)
1520 struct iscsi_conn *conn = csk->user_data;
1523 log_debug(1 << CXGBI_DBG_SOCK,
1524 "csk 0x%p, cid %d.\n", csk, conn->id);
1525 iscsi_conn_queue_work(conn);
1528 EXPORT_SYMBOL_GPL(cxgbi_conn_tx_open);
1531 * pdu receive, interact with libiscsi_tcp
1533 static inline int read_pdu_skb(struct iscsi_conn *conn,
1534 struct sk_buff *skb,
1535 unsigned int offset,
1541 bytes_read = iscsi_tcp_recv_skb(conn, skb, offset, offloaded, &status);
1543 case ISCSI_TCP_CONN_ERR:
1544 pr_info("skb 0x%p, off %u, %d, TCP_ERR.\n",
1545 skb, offset, offloaded);
1547 case ISCSI_TCP_SUSPENDED:
1548 log_debug(1 << CXGBI_DBG_PDU_RX,
1549 "skb 0x%p, off %u, %d, TCP_SUSPEND, rc %d.\n",
1550 skb, offset, offloaded, bytes_read);
1551 /* no transfer - just have caller flush queue */
1553 case ISCSI_TCP_SKB_DONE:
1554 pr_info("skb 0x%p, off %u, %d, TCP_SKB_DONE.\n",
1555 skb, offset, offloaded);
1557 * pdus should always fit in the skb and we should get
1558 * segment done notifcation.
1560 iscsi_conn_printk(KERN_ERR, conn, "Invalid pdu or skb.");
1562 case ISCSI_TCP_SEGMENT_DONE:
1563 log_debug(1 << CXGBI_DBG_PDU_RX,
1564 "skb 0x%p, off %u, %d, TCP_SEG_DONE, rc %d.\n",
1565 skb, offset, offloaded, bytes_read);
1568 pr_info("skb 0x%p, off %u, %d, invalid status %d.\n",
1569 skb, offset, offloaded, status);
1575 skb_read_pdu_bhs(struct cxgbi_sock *csk, struct iscsi_conn *conn,
1576 struct sk_buff *skb)
1578 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
1581 log_debug(1 << CXGBI_DBG_PDU_RX,
1582 "conn 0x%p, skb 0x%p, len %u, flag 0x%lx.\n",
1583 conn, skb, skb->len, cxgbi_skcb_flags(skb));
1585 if (!iscsi_tcp_recv_segment_is_hdr(tcp_conn)) {
1586 pr_info("conn 0x%p, skb 0x%p, not hdr.\n", conn, skb);
1587 iscsi_conn_failure(conn, ISCSI_ERR_PROTO);
1591 if (conn->hdrdgst_en &&
1592 cxgbi_skcb_test_flag(skb, SKCBF_RX_HCRC_ERR)) {
1593 pr_info("conn 0x%p, skb 0x%p, hcrc.\n", conn, skb);
1594 iscsi_conn_failure(conn, ISCSI_ERR_HDR_DGST);
1598 if (cxgbi_skcb_test_flag(skb, SKCBF_RX_ISCSI_COMPL) &&
1599 cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA_DDPD)) {
1600 /* If completion flag is set and data is directly
1601 * placed in to the host memory then update
1602 * task->exp_datasn to the datasn in completion
1603 * iSCSI hdr as T6 adapter generates completion only
1604 * for the last pdu of a sequence.
1606 itt_t itt = ((struct iscsi_data *)skb->data)->itt;
1607 struct iscsi_task *task = iscsi_itt_to_ctask(conn, itt);
1608 u32 data_sn = be32_to_cpu(((struct iscsi_data *)
1609 skb->data)->datasn);
1610 if (task && task->sc) {
1611 struct iscsi_tcp_task *tcp_task = task->dd_data;
1613 tcp_task->exp_datasn = data_sn;
1617 err = read_pdu_skb(conn, skb, 0, 0);
1618 if (likely(err >= 0)) {
1619 struct iscsi_hdr *hdr = (struct iscsi_hdr *)skb->data;
1620 u8 opcode = hdr->opcode & ISCSI_OPCODE_MASK;
1622 if (unlikely(opcode == ISCSI_OP_LOGOUT_RSP))
1623 cxgbi_sock_set_flag(csk, CTPF_LOGOUT_RSP_RCVD);
1629 static int skb_read_pdu_data(struct iscsi_conn *conn, struct sk_buff *lskb,
1630 struct sk_buff *skb, unsigned int offset)
1632 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
1634 int opcode = tcp_conn->in.hdr->opcode & ISCSI_OPCODE_MASK;
1636 log_debug(1 << CXGBI_DBG_PDU_RX,
1637 "conn 0x%p, skb 0x%p, len %u, flag 0x%lx.\n",
1638 conn, skb, skb->len, cxgbi_skcb_flags(skb));
1640 if (conn->datadgst_en &&
1641 cxgbi_skcb_test_flag(lskb, SKCBF_RX_DCRC_ERR)) {
1642 pr_info("conn 0x%p, skb 0x%p, dcrc 0x%lx.\n",
1643 conn, lskb, cxgbi_skcb_flags(lskb));
1644 iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
1648 if (iscsi_tcp_recv_segment_is_hdr(tcp_conn))
1651 /* coalesced, add header digest length */
1652 if (lskb == skb && conn->hdrdgst_en)
1653 offset += ISCSI_DIGEST_SIZE;
1655 if (cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA_DDPD))
1658 if (opcode == ISCSI_OP_SCSI_DATA_IN)
1659 log_debug(1 << CXGBI_DBG_PDU_RX,
1660 "skb 0x%p, op 0x%x, itt 0x%x, %u %s ddp'ed.\n",
1661 skb, opcode, ntohl(tcp_conn->in.hdr->itt),
1662 tcp_conn->in.datalen, offloaded ? "is" : "not");
1664 return read_pdu_skb(conn, skb, offset, offloaded);
1667 static void csk_return_rx_credits(struct cxgbi_sock *csk, int copied)
1669 struct cxgbi_device *cdev = csk->cdev;
1673 log_debug(1 << CXGBI_DBG_PDU_RX,
1674 "csk 0x%p,%u,0x%lx,%u, seq %u, wup %u, thre %u, %u.\n",
1675 csk, csk->state, csk->flags, csk->tid, csk->copied_seq,
1676 csk->rcv_wup, cdev->rx_credit_thres,
1679 if (!cdev->rx_credit_thres)
1682 if (csk->state != CTP_ESTABLISHED)
1685 credits = csk->copied_seq - csk->rcv_wup;
1686 if (unlikely(!credits))
1688 must_send = credits + 16384 >= csk->rcv_win;
1689 if (must_send || credits >= cdev->rx_credit_thres)
1690 csk->rcv_wup += cdev->csk_send_rx_credits(csk, credits);
1693 void cxgbi_conn_pdu_ready(struct cxgbi_sock *csk)
1695 struct cxgbi_device *cdev = csk->cdev;
1696 struct iscsi_conn *conn = csk->user_data;
1697 struct sk_buff *skb;
1698 unsigned int read = 0;
1701 log_debug(1 << CXGBI_DBG_PDU_RX,
1702 "csk 0x%p, conn 0x%p.\n", csk, conn);
1704 if (unlikely(!conn || conn->suspend_rx)) {
1705 log_debug(1 << CXGBI_DBG_PDU_RX,
1706 "csk 0x%p, conn 0x%p, id %d, suspend_rx %lu!\n",
1707 csk, conn, conn ? conn->id : 0xFF,
1708 conn ? conn->suspend_rx : 0xFF);
1713 skb = skb_peek(&csk->receive_queue);
1715 !(cxgbi_skcb_test_flag(skb, SKCBF_RX_STATUS))) {
1717 log_debug(1 << CXGBI_DBG_PDU_RX,
1718 "skb 0x%p, NOT ready 0x%lx.\n",
1719 skb, cxgbi_skcb_flags(skb));
1722 __skb_unlink(skb, &csk->receive_queue);
1724 read += cxgbi_skcb_rx_pdulen(skb);
1725 log_debug(1 << CXGBI_DBG_PDU_RX,
1726 "csk 0x%p, skb 0x%p,%u,f 0x%lx, pdu len %u.\n",
1727 csk, skb, skb->len, cxgbi_skcb_flags(skb),
1728 cxgbi_skcb_rx_pdulen(skb));
1730 if (cxgbi_skcb_test_flag(skb, SKCBF_RX_COALESCED)) {
1731 err = skb_read_pdu_bhs(csk, conn, skb);
1733 pr_err("coalesced bhs, csk 0x%p, skb 0x%p,%u, "
1734 "f 0x%lx, plen %u.\n",
1736 cxgbi_skcb_flags(skb),
1737 cxgbi_skcb_rx_pdulen(skb));
1740 err = skb_read_pdu_data(conn, skb, skb,
1741 err + cdev->skb_rx_extra);
1743 pr_err("coalesced data, csk 0x%p, skb 0x%p,%u, "
1744 "f 0x%lx, plen %u.\n",
1746 cxgbi_skcb_flags(skb),
1747 cxgbi_skcb_rx_pdulen(skb));
1749 err = skb_read_pdu_bhs(csk, conn, skb);
1751 pr_err("bhs, csk 0x%p, skb 0x%p,%u, "
1752 "f 0x%lx, plen %u.\n",
1754 cxgbi_skcb_flags(skb),
1755 cxgbi_skcb_rx_pdulen(skb));
1759 if (cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) {
1760 struct sk_buff *dskb;
1762 dskb = skb_peek(&csk->receive_queue);
1764 pr_err("csk 0x%p, skb 0x%p,%u, f 0x%lx,"
1765 " plen %u, NO data.\n",
1767 cxgbi_skcb_flags(skb),
1768 cxgbi_skcb_rx_pdulen(skb));
1772 __skb_unlink(dskb, &csk->receive_queue);
1774 err = skb_read_pdu_data(conn, skb, dskb, 0);
1776 pr_err("data, csk 0x%p, skb 0x%p,%u, "
1777 "f 0x%lx, plen %u, dskb 0x%p,"
1780 cxgbi_skcb_flags(skb),
1781 cxgbi_skcb_rx_pdulen(skb),
1785 err = skb_read_pdu_data(conn, skb, skb, 0);
1794 log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, read %u.\n", csk, read);
1796 csk->copied_seq += read;
1797 csk_return_rx_credits(csk, read);
1798 conn->rxdata_octets += read;
1802 pr_info("csk 0x%p, 0x%p, rx failed %d, read %u.\n",
1803 csk, conn, err, read);
1804 iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
1807 EXPORT_SYMBOL_GPL(cxgbi_conn_pdu_ready);
1809 static int sgl_seek_offset(struct scatterlist *sgl, unsigned int sgcnt,
1810 unsigned int offset, unsigned int *off,
1811 struct scatterlist **sgp)
1814 struct scatterlist *sg;
1816 for_each_sg(sgl, sg, sgcnt, i) {
1817 if (offset < sg->length) {
1822 offset -= sg->length;
1827 static int sgl_read_to_frags(struct scatterlist *sg, unsigned int sgoffset,
1828 unsigned int dlen, struct page_frag *frags,
1831 unsigned int datalen = dlen;
1832 unsigned int sglen = sg->length - sgoffset;
1833 struct page *page = sg_page(sg);
1843 pr_warn("sg %d NULL, len %u/%u.\n",
1852 copy = min(datalen, sglen);
1853 if (i && page == frags[i - 1].page &&
1854 sgoffset + sg->offset ==
1855 frags[i - 1].offset + frags[i - 1].size) {
1856 frags[i - 1].size += copy;
1858 if (i >= frag_max) {
1859 pr_warn("too many pages %u, dlen %u.\n",
1864 frags[i].page = page;
1865 frags[i].offset = sg->offset + sgoffset;
1866 frags[i].size = copy;
1877 int cxgbi_conn_alloc_pdu(struct iscsi_task *task, u8 opcode)
1879 struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
1880 struct cxgbi_conn *cconn = tcp_conn->dd_data;
1881 struct cxgbi_device *cdev = cconn->chba->cdev;
1882 struct iscsi_conn *conn = task->conn;
1883 struct iscsi_tcp_task *tcp_task = task->dd_data;
1884 struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
1885 struct scsi_cmnd *sc = task->sc;
1886 int headroom = SKB_TX_ISCSI_PDU_HEADER_MAX;
1888 tcp_task->dd_data = tdata;
1892 kfree_skb(tdata->skb);
1896 if (SKB_MAX_HEAD(cdev->skb_tx_rsvd) > (512 * MAX_SKB_FRAGS) &&
1897 (opcode == ISCSI_OP_SCSI_DATA_OUT ||
1898 (opcode == ISCSI_OP_SCSI_CMD &&
1899 (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_TO_DEVICE))))
1900 /* data could goes into skb head */
1901 headroom += min_t(unsigned int,
1902 SKB_MAX_HEAD(cdev->skb_tx_rsvd),
1903 conn->max_xmit_dlength);
1905 tdata->skb = alloc_skb(cdev->skb_tx_rsvd + headroom, GFP_ATOMIC);
1907 struct cxgbi_sock *csk = cconn->cep->csk;
1908 struct net_device *ndev = cdev->ports[csk->port_id];
1909 ndev->stats.tx_dropped++;
1913 skb_get(tdata->skb);
1914 skb_reserve(tdata->skb, cdev->skb_tx_rsvd);
1915 task->hdr = (struct iscsi_hdr *)tdata->skb->data;
1916 task->hdr_max = SKB_TX_ISCSI_PDU_HEADER_MAX; /* BHS + AHS */
1918 /* data_out uses scsi_cmd's itt */
1919 if (opcode != ISCSI_OP_SCSI_DATA_OUT)
1920 task_reserve_itt(task, &task->hdr->itt);
1922 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
1923 "task 0x%p, op 0x%x, skb 0x%p,%u+%u/%u, itt 0x%x.\n",
1924 task, opcode, tdata->skb, cdev->skb_tx_rsvd, headroom,
1925 conn->max_xmit_dlength, ntohl(task->hdr->itt));
1929 EXPORT_SYMBOL_GPL(cxgbi_conn_alloc_pdu);
1931 static inline void tx_skb_setmode(struct sk_buff *skb, int hcrc, int dcrc)
1940 cxgbi_skcb_ulp_mode(skb) = (ULP2_MODE_ISCSI << 4) | submode;
1942 cxgbi_skcb_ulp_mode(skb) = 0;
1945 int cxgbi_conn_init_pdu(struct iscsi_task *task, unsigned int offset,
1948 struct iscsi_conn *conn = task->conn;
1949 struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
1950 struct sk_buff *skb = tdata->skb;
1951 unsigned int datalen = count;
1952 int i, padlen = iscsi_padding(count);
1955 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
1956 "task 0x%p,0x%p, skb 0x%p, 0x%x,0x%x,0x%x, %u+%u.\n",
1957 task, task->sc, skb, (*skb->data) & ISCSI_OPCODE_MASK,
1958 ntohl(task->cmdsn), ntohl(task->hdr->itt), offset, count);
1960 skb_put(skb, task->hdr_len);
1961 tx_skb_setmode(skb, conn->hdrdgst_en, datalen ? conn->datadgst_en : 0);
1966 struct scsi_data_buffer *sdb = scsi_out(task->sc);
1967 struct scatterlist *sg = NULL;
1970 tdata->offset = offset;
1971 tdata->count = count;
1972 err = sgl_seek_offset(
1973 sdb->table.sgl, sdb->table.nents,
1974 tdata->offset, &tdata->sgoffset, &sg);
1976 pr_warn("tpdu, sgl %u, bad offset %u/%u.\n",
1977 sdb->table.nents, tdata->offset, sdb->length);
1980 err = sgl_read_to_frags(sg, tdata->sgoffset, tdata->count,
1981 tdata->frags, MAX_PDU_FRAGS);
1983 pr_warn("tpdu, sgl %u, bad offset %u + %u.\n",
1984 sdb->table.nents, tdata->offset, tdata->count);
1987 tdata->nr_frags = err;
1989 if (tdata->nr_frags > MAX_SKB_FRAGS ||
1990 (padlen && tdata->nr_frags == MAX_SKB_FRAGS)) {
1991 char *dst = skb->data + task->hdr_len;
1992 struct page_frag *frag = tdata->frags;
1994 /* data fits in the skb's headroom */
1995 for (i = 0; i < tdata->nr_frags; i++, frag++) {
1996 char *src = kmap_atomic(frag->page);
1998 memcpy(dst, src+frag->offset, frag->size);
2003 memset(dst, 0, padlen);
2006 skb_put(skb, count + padlen);
2008 /* data fit into frag_list */
2009 for (i = 0; i < tdata->nr_frags; i++) {
2010 __skb_fill_page_desc(skb, i,
2011 tdata->frags[i].page,
2012 tdata->frags[i].offset,
2013 tdata->frags[i].size);
2014 skb_frag_ref(skb, i);
2016 skb_shinfo(skb)->nr_frags = tdata->nr_frags;
2018 skb->data_len += count;
2019 skb->truesize += count;
2023 pg = virt_to_page(task->data);
2026 skb_fill_page_desc(skb, 0, pg, offset_in_page(task->data),
2029 skb->data_len += count;
2030 skb->truesize += count;
2034 i = skb_shinfo(skb)->nr_frags;
2035 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
2036 virt_to_page(padding), offset_in_page(padding),
2039 skb->data_len += padlen;
2040 skb->truesize += padlen;
2046 EXPORT_SYMBOL_GPL(cxgbi_conn_init_pdu);
2048 int cxgbi_conn_xmit_pdu(struct iscsi_task *task)
2050 struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
2051 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2052 struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
2053 struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo;
2054 struct sk_buff *skb = tdata->skb;
2055 struct cxgbi_sock *csk = NULL;
2056 unsigned int datalen;
2059 if (!skb || cxgbi_skcb_test_flag(skb, SKCBF_TX_DONE)) {
2060 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
2061 "task 0x%p, skb 0x%p\n", task, skb);
2065 if (cconn && cconn->cep)
2066 csk = cconn->cep->csk;
2068 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
2069 "task 0x%p, csk gone.\n", task);
2073 datalen = skb->data_len;
2075 /* write ppod first if using ofldq to write ppod */
2076 if (ttinfo->flags & CXGBI_PPOD_INFO_FLAG_VALID) {
2077 struct cxgbi_ppm *ppm = csk->cdev->cdev2ppm(csk->cdev);
2079 ttinfo->flags &= ~CXGBI_PPOD_INFO_FLAG_VALID;
2080 if (csk->cdev->csk_ddp_set_map(ppm, csk, ttinfo) < 0)
2081 pr_err("task 0x%p, ppod writing using ofldq failed.\n",
2083 /* continue. Let fl get the data */
2086 err = cxgbi_sock_send_pdus(cconn->cep->csk, skb);
2090 log_debug(1 << CXGBI_DBG_PDU_TX,
2091 "task 0x%p,0x%p, skb 0x%p, len %u/%u, rv %d.\n",
2092 task, task->sc, skb, skb->len, skb->data_len, err);
2094 if (task->conn->hdrdgst_en)
2095 pdulen += ISCSI_DIGEST_SIZE;
2097 if (datalen && task->conn->datadgst_en)
2098 pdulen += ISCSI_DIGEST_SIZE;
2100 task->conn->txdata_octets += pdulen;
2101 cxgbi_skcb_set_flag(skb, SKCBF_TX_DONE);
2105 if (err == -EAGAIN || err == -ENOBUFS) {
2106 log_debug(1 << CXGBI_DBG_PDU_TX,
2107 "task 0x%p, skb 0x%p, len %u/%u, %d EAGAIN.\n",
2108 task, skb, skb->len, skb->data_len, err);
2109 /* reset skb to send when we are called again */
2113 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
2114 "itt 0x%x, skb 0x%p, len %u/%u, xmit err %d.\n",
2115 task->itt, skb, skb->len, skb->data_len, err);
2117 __kfree_skb(tdata->skb);
2120 iscsi_conn_printk(KERN_ERR, task->conn, "xmit err %d.\n", err);
2121 iscsi_conn_failure(task->conn, ISCSI_ERR_XMIT_FAILED);
2124 EXPORT_SYMBOL_GPL(cxgbi_conn_xmit_pdu);
2126 void cxgbi_cleanup_task(struct iscsi_task *task)
2128 struct iscsi_tcp_task *tcp_task = task->dd_data;
2129 struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
2131 log_debug(1 << CXGBI_DBG_ISCSI,
2132 "task 0x%p, skb 0x%p, itt 0x%x.\n",
2133 task, tdata->skb, task->hdr_itt);
2135 tcp_task->dd_data = NULL;
2136 /* never reached the xmit task callout */
2138 kfree_skb(tdata->skb);
2142 task_release_itt(task, task->hdr_itt);
2143 memset(tdata, 0, sizeof(*tdata));
2145 iscsi_tcp_cleanup_task(task);
2147 EXPORT_SYMBOL_GPL(cxgbi_cleanup_task);
2149 void cxgbi_get_conn_stats(struct iscsi_cls_conn *cls_conn,
2150 struct iscsi_stats *stats)
2152 struct iscsi_conn *conn = cls_conn->dd_data;
2154 stats->txdata_octets = conn->txdata_octets;
2155 stats->rxdata_octets = conn->rxdata_octets;
2156 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
2157 stats->dataout_pdus = conn->dataout_pdus_cnt;
2158 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
2159 stats->datain_pdus = conn->datain_pdus_cnt;
2160 stats->r2t_pdus = conn->r2t_pdus_cnt;
2161 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
2162 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
2163 stats->digest_err = 0;
2164 stats->timeout_err = 0;
2165 stats->custom_length = 1;
2166 strcpy(stats->custom[0].desc, "eh_abort_cnt");
2167 stats->custom[0].value = conn->eh_abort_cnt;
2169 EXPORT_SYMBOL_GPL(cxgbi_get_conn_stats);
2171 static int cxgbi_conn_max_xmit_dlength(struct iscsi_conn *conn)
2173 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
2174 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2175 struct cxgbi_device *cdev = cconn->chba->cdev;
2176 unsigned int headroom = SKB_MAX_HEAD(cdev->skb_tx_rsvd);
2177 unsigned int max_def = 512 * MAX_SKB_FRAGS;
2178 unsigned int max = max(max_def, headroom);
2180 max = min(cconn->chba->cdev->tx_max_size, max);
2181 if (conn->max_xmit_dlength)
2182 conn->max_xmit_dlength = min(conn->max_xmit_dlength, max);
2184 conn->max_xmit_dlength = max;
2185 cxgbi_align_pdu_size(conn->max_xmit_dlength);
2190 static int cxgbi_conn_max_recv_dlength(struct iscsi_conn *conn)
2192 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
2193 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2194 unsigned int max = cconn->chba->cdev->rx_max_size;
2196 cxgbi_align_pdu_size(max);
2198 if (conn->max_recv_dlength) {
2199 if (conn->max_recv_dlength > max) {
2200 pr_err("MaxRecvDataSegmentLength %u > %u.\n",
2201 conn->max_recv_dlength, max);
2204 conn->max_recv_dlength = min(conn->max_recv_dlength, max);
2205 cxgbi_align_pdu_size(conn->max_recv_dlength);
2207 conn->max_recv_dlength = max;
2212 int cxgbi_set_conn_param(struct iscsi_cls_conn *cls_conn,
2213 enum iscsi_param param, char *buf, int buflen)
2215 struct iscsi_conn *conn = cls_conn->dd_data;
2216 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
2217 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2218 struct cxgbi_sock *csk = cconn->cep->csk;
2221 log_debug(1 << CXGBI_DBG_ISCSI,
2222 "cls_conn 0x%p, param %d, buf(%d) %s.\n",
2223 cls_conn, param, buflen, buf);
2226 case ISCSI_PARAM_HDRDGST_EN:
2227 err = iscsi_set_param(cls_conn, param, buf, buflen);
2228 if (!err && conn->hdrdgst_en)
2229 err = csk->cdev->csk_ddp_setup_digest(csk, csk->tid,
2231 conn->datadgst_en, 0);
2233 case ISCSI_PARAM_DATADGST_EN:
2234 err = iscsi_set_param(cls_conn, param, buf, buflen);
2235 if (!err && conn->datadgst_en)
2236 err = csk->cdev->csk_ddp_setup_digest(csk, csk->tid,
2238 conn->datadgst_en, 0);
2240 case ISCSI_PARAM_MAX_R2T:
2241 return iscsi_tcp_set_max_r2t(conn, buf);
2242 case ISCSI_PARAM_MAX_RECV_DLENGTH:
2243 err = iscsi_set_param(cls_conn, param, buf, buflen);
2245 err = cxgbi_conn_max_recv_dlength(conn);
2247 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
2248 err = iscsi_set_param(cls_conn, param, buf, buflen);
2250 err = cxgbi_conn_max_xmit_dlength(conn);
2253 return iscsi_set_param(cls_conn, param, buf, buflen);
2257 EXPORT_SYMBOL_GPL(cxgbi_set_conn_param);
2259 static inline int csk_print_port(struct cxgbi_sock *csk, char *buf)
2263 cxgbi_sock_get(csk);
2264 len = sprintf(buf, "%hu\n", ntohs(csk->daddr.sin_port));
2265 cxgbi_sock_put(csk);
2270 static inline int csk_print_ip(struct cxgbi_sock *csk, char *buf)
2274 cxgbi_sock_get(csk);
2275 if (csk->csk_family == AF_INET)
2276 len = sprintf(buf, "%pI4",
2277 &csk->daddr.sin_addr.s_addr);
2279 len = sprintf(buf, "%pI6",
2280 &csk->daddr6.sin6_addr);
2282 cxgbi_sock_put(csk);
2287 int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param param,
2290 struct cxgbi_endpoint *cep = ep->dd_data;
2291 struct cxgbi_sock *csk;
2294 log_debug(1 << CXGBI_DBG_ISCSI,
2295 "cls_conn 0x%p, param %d.\n", ep, param);
2298 case ISCSI_PARAM_CONN_PORT:
2299 case ISCSI_PARAM_CONN_ADDRESS:
2307 return iscsi_conn_get_addr_param((struct sockaddr_storage *)
2308 &csk->daddr, param, buf);
2314 EXPORT_SYMBOL_GPL(cxgbi_get_ep_param);
2316 struct iscsi_cls_conn *
2317 cxgbi_create_conn(struct iscsi_cls_session *cls_session, u32 cid)
2319 struct iscsi_cls_conn *cls_conn;
2320 struct iscsi_conn *conn;
2321 struct iscsi_tcp_conn *tcp_conn;
2322 struct cxgbi_conn *cconn;
2324 cls_conn = iscsi_tcp_conn_setup(cls_session, sizeof(*cconn), cid);
2328 conn = cls_conn->dd_data;
2329 tcp_conn = conn->dd_data;
2330 cconn = tcp_conn->dd_data;
2331 cconn->iconn = conn;
2333 log_debug(1 << CXGBI_DBG_ISCSI,
2334 "cid %u(0x%x), cls 0x%p,0x%p, conn 0x%p,0x%p,0x%p.\n",
2335 cid, cid, cls_session, cls_conn, conn, tcp_conn, cconn);
2339 EXPORT_SYMBOL_GPL(cxgbi_create_conn);
2341 int cxgbi_bind_conn(struct iscsi_cls_session *cls_session,
2342 struct iscsi_cls_conn *cls_conn,
2343 u64 transport_eph, int is_leading)
2345 struct iscsi_conn *conn = cls_conn->dd_data;
2346 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
2347 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2348 struct cxgbi_ppm *ppm;
2349 struct iscsi_endpoint *ep;
2350 struct cxgbi_endpoint *cep;
2351 struct cxgbi_sock *csk;
2354 ep = iscsi_lookup_endpoint(transport_eph);
2358 /* setup ddp pagesize */
2362 ppm = csk->cdev->cdev2ppm(csk->cdev);
2363 err = csk->cdev->csk_ddp_setup_pgidx(csk, csk->tid,
2364 ppm->tformat.pgsz_idx_dflt, 0);
2368 err = iscsi_conn_bind(cls_session, cls_conn, is_leading);
2372 /* calculate the tag idx bits needed for this conn based on cmds_max */
2373 cconn->task_idx_bits = (__ilog2_u32(conn->session->cmds_max - 1)) + 1;
2375 write_lock_bh(&csk->callback_lock);
2376 csk->user_data = conn;
2377 cconn->chba = cep->chba;
2380 write_unlock_bh(&csk->callback_lock);
2382 cxgbi_conn_max_xmit_dlength(conn);
2383 cxgbi_conn_max_recv_dlength(conn);
2385 log_debug(1 << CXGBI_DBG_ISCSI,
2386 "cls 0x%p,0x%p, ep 0x%p, cconn 0x%p, csk 0x%p.\n",
2387 cls_session, cls_conn, ep, cconn, csk);
2388 /* init recv engine */
2389 iscsi_tcp_hdr_recv_prep(tcp_conn);
2393 EXPORT_SYMBOL_GPL(cxgbi_bind_conn);
2395 struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *ep,
2396 u16 cmds_max, u16 qdepth,
2399 struct cxgbi_endpoint *cep;
2400 struct cxgbi_hba *chba;
2401 struct Scsi_Host *shost;
2402 struct iscsi_cls_session *cls_session;
2403 struct iscsi_session *session;
2406 pr_err("missing endpoint.\n");
2412 shost = chba->shost;
2414 BUG_ON(chba != iscsi_host_priv(shost));
2416 cls_session = iscsi_session_setup(chba->cdev->itp, shost,
2418 sizeof(struct iscsi_tcp_task) +
2419 sizeof(struct cxgbi_task_data),
2420 initial_cmdsn, ISCSI_MAX_TARGET);
2424 session = cls_session->dd_data;
2425 if (iscsi_tcp_r2tpool_alloc(session))
2426 goto remove_session;
2428 log_debug(1 << CXGBI_DBG_ISCSI,
2429 "ep 0x%p, cls sess 0x%p.\n", ep, cls_session);
2433 iscsi_session_teardown(cls_session);
2436 EXPORT_SYMBOL_GPL(cxgbi_create_session);
2438 void cxgbi_destroy_session(struct iscsi_cls_session *cls_session)
2440 log_debug(1 << CXGBI_DBG_ISCSI,
2441 "cls sess 0x%p.\n", cls_session);
2443 iscsi_tcp_r2tpool_free(cls_session->dd_data);
2444 iscsi_session_teardown(cls_session);
2446 EXPORT_SYMBOL_GPL(cxgbi_destroy_session);
2448 int cxgbi_set_host_param(struct Scsi_Host *shost, enum iscsi_host_param param,
2449 char *buf, int buflen)
2451 struct cxgbi_hba *chba = iscsi_host_priv(shost);
2454 shost_printk(KERN_ERR, shost, "Could not get host param. "
2455 "netdev for host not set.\n");
2459 log_debug(1 << CXGBI_DBG_ISCSI,
2460 "shost 0x%p, hba 0x%p,%s, param %d, buf(%d) %s.\n",
2461 shost, chba, chba->ndev->name, param, buflen, buf);
2464 case ISCSI_HOST_PARAM_IPADDRESS:
2466 __be32 addr = in_aton(buf);
2467 log_debug(1 << CXGBI_DBG_ISCSI,
2468 "hba %s, req. ipv4 %pI4.\n", chba->ndev->name, &addr);
2469 cxgbi_set_iscsi_ipv4(chba, addr);
2472 case ISCSI_HOST_PARAM_HWADDRESS:
2473 case ISCSI_HOST_PARAM_NETDEV_NAME:
2476 return iscsi_host_set_param(shost, param, buf, buflen);
2479 EXPORT_SYMBOL_GPL(cxgbi_set_host_param);
2481 int cxgbi_get_host_param(struct Scsi_Host *shost, enum iscsi_host_param param,
2484 struct cxgbi_hba *chba = iscsi_host_priv(shost);
2488 shost_printk(KERN_ERR, shost, "Could not get host param. "
2489 "netdev for host not set.\n");
2493 log_debug(1 << CXGBI_DBG_ISCSI,
2494 "shost 0x%p, hba 0x%p,%s, param %d.\n",
2495 shost, chba, chba->ndev->name, param);
2498 case ISCSI_HOST_PARAM_HWADDRESS:
2499 len = sysfs_format_mac(buf, chba->ndev->dev_addr, 6);
2501 case ISCSI_HOST_PARAM_NETDEV_NAME:
2502 len = sprintf(buf, "%s\n", chba->ndev->name);
2504 case ISCSI_HOST_PARAM_IPADDRESS:
2506 struct cxgbi_sock *csk = find_sock_on_port(chba->cdev,
2509 len = sprintf(buf, "%pIS",
2510 (struct sockaddr *)&csk->saddr);
2512 log_debug(1 << CXGBI_DBG_ISCSI,
2513 "hba %s, addr %s.\n", chba->ndev->name, buf);
2517 return iscsi_host_get_param(shost, param, buf);
2522 EXPORT_SYMBOL_GPL(cxgbi_get_host_param);
2524 struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *shost,
2525 struct sockaddr *dst_addr,
2528 struct iscsi_endpoint *ep;
2529 struct cxgbi_endpoint *cep;
2530 struct cxgbi_hba *hba = NULL;
2531 struct cxgbi_sock *csk;
2534 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK,
2535 "shost 0x%p, non_blocking %d, dst_addr 0x%p.\n",
2536 shost, non_blocking, dst_addr);
2539 hba = iscsi_host_priv(shost);
2541 pr_info("shost 0x%p, priv NULL.\n", shost);
2546 if (dst_addr->sa_family == AF_INET) {
2547 csk = cxgbi_check_route(dst_addr);
2548 #if IS_ENABLED(CONFIG_IPV6)
2549 } else if (dst_addr->sa_family == AF_INET6) {
2550 csk = cxgbi_check_route6(dst_addr);
2553 pr_info("address family 0x%x NOT supported.\n",
2554 dst_addr->sa_family);
2555 err = -EAFNOSUPPORT;
2556 return (struct iscsi_endpoint *)ERR_PTR(err);
2560 return (struct iscsi_endpoint *)csk;
2561 cxgbi_sock_get(csk);
2564 hba = csk->cdev->hbas[csk->port_id];
2565 else if (hba != csk->cdev->hbas[csk->port_id]) {
2566 pr_info("Could not connect through requested host %u"
2567 "hba 0x%p != 0x%p (%u).\n",
2568 shost->host_no, hba,
2569 csk->cdev->hbas[csk->port_id], csk->port_id);
2574 err = sock_get_port(csk);
2578 cxgbi_sock_set_state(csk, CTP_CONNECTING);
2579 err = csk->cdev->csk_init_act_open(csk);
2583 if (cxgbi_sock_is_closing(csk)) {
2585 pr_info("csk 0x%p is closing.\n", csk);
2589 ep = iscsi_create_endpoint(sizeof(*cep));
2592 pr_info("iscsi alloc ep, OOM.\n");
2600 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK,
2601 "ep 0x%p, cep 0x%p, csk 0x%p, hba 0x%p,%s.\n",
2602 ep, cep, csk, hba, hba->ndev->name);
2606 cxgbi_sock_put(csk);
2607 cxgbi_sock_closed(csk);
2609 return ERR_PTR(err);
2611 EXPORT_SYMBOL_GPL(cxgbi_ep_connect);
2613 int cxgbi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
2615 struct cxgbi_endpoint *cep = ep->dd_data;
2616 struct cxgbi_sock *csk = cep->csk;
2618 if (!cxgbi_sock_is_established(csk))
2622 EXPORT_SYMBOL_GPL(cxgbi_ep_poll);
2624 void cxgbi_ep_disconnect(struct iscsi_endpoint *ep)
2626 struct cxgbi_endpoint *cep = ep->dd_data;
2627 struct cxgbi_conn *cconn = cep->cconn;
2628 struct cxgbi_sock *csk = cep->csk;
2630 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK,
2631 "ep 0x%p, cep 0x%p, cconn 0x%p, csk 0x%p,%u,0x%lx.\n",
2632 ep, cep, cconn, csk, csk->state, csk->flags);
2634 if (cconn && cconn->iconn) {
2635 iscsi_suspend_tx(cconn->iconn);
2636 write_lock_bh(&csk->callback_lock);
2637 cep->csk->user_data = NULL;
2639 write_unlock_bh(&csk->callback_lock);
2641 iscsi_destroy_endpoint(ep);
2643 if (likely(csk->state >= CTP_ESTABLISHED))
2644 need_active_close(csk);
2646 cxgbi_sock_closed(csk);
2648 cxgbi_sock_put(csk);
2650 EXPORT_SYMBOL_GPL(cxgbi_ep_disconnect);
2652 int cxgbi_iscsi_init(struct iscsi_transport *itp,
2653 struct scsi_transport_template **stt)
2655 *stt = iscsi_register_transport(itp);
2657 pr_err("unable to register %s transport 0x%p.\n",
2661 log_debug(1 << CXGBI_DBG_ISCSI,
2662 "%s, registered iscsi transport 0x%p.\n",
2666 EXPORT_SYMBOL_GPL(cxgbi_iscsi_init);
2668 void cxgbi_iscsi_cleanup(struct iscsi_transport *itp,
2669 struct scsi_transport_template **stt)
2672 log_debug(1 << CXGBI_DBG_ISCSI,
2673 "de-register transport 0x%p, %s, stt 0x%p.\n",
2674 itp, itp->name, *stt);
2676 iscsi_unregister_transport(itp);
2679 EXPORT_SYMBOL_GPL(cxgbi_iscsi_cleanup);
2681 umode_t cxgbi_attr_is_visible(int param_type, int param)
2683 switch (param_type) {
2684 case ISCSI_HOST_PARAM:
2686 case ISCSI_HOST_PARAM_NETDEV_NAME:
2687 case ISCSI_HOST_PARAM_HWADDRESS:
2688 case ISCSI_HOST_PARAM_IPADDRESS:
2689 case ISCSI_HOST_PARAM_INITIATOR_NAME:
2696 case ISCSI_PARAM_MAX_RECV_DLENGTH:
2697 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
2698 case ISCSI_PARAM_HDRDGST_EN:
2699 case ISCSI_PARAM_DATADGST_EN:
2700 case ISCSI_PARAM_CONN_ADDRESS:
2701 case ISCSI_PARAM_CONN_PORT:
2702 case ISCSI_PARAM_EXP_STATSN:
2703 case ISCSI_PARAM_PERSISTENT_ADDRESS:
2704 case ISCSI_PARAM_PERSISTENT_PORT:
2705 case ISCSI_PARAM_PING_TMO:
2706 case ISCSI_PARAM_RECV_TMO:
2707 case ISCSI_PARAM_INITIAL_R2T_EN:
2708 case ISCSI_PARAM_MAX_R2T:
2709 case ISCSI_PARAM_IMM_DATA_EN:
2710 case ISCSI_PARAM_FIRST_BURST:
2711 case ISCSI_PARAM_MAX_BURST:
2712 case ISCSI_PARAM_PDU_INORDER_EN:
2713 case ISCSI_PARAM_DATASEQ_INORDER_EN:
2714 case ISCSI_PARAM_ERL:
2715 case ISCSI_PARAM_TARGET_NAME:
2716 case ISCSI_PARAM_TPGT:
2717 case ISCSI_PARAM_USERNAME:
2718 case ISCSI_PARAM_PASSWORD:
2719 case ISCSI_PARAM_USERNAME_IN:
2720 case ISCSI_PARAM_PASSWORD_IN:
2721 case ISCSI_PARAM_FAST_ABORT:
2722 case ISCSI_PARAM_ABORT_TMO:
2723 case ISCSI_PARAM_LU_RESET_TMO:
2724 case ISCSI_PARAM_TGT_RESET_TMO:
2725 case ISCSI_PARAM_IFACE_NAME:
2726 case ISCSI_PARAM_INITIATOR_NAME:
2735 EXPORT_SYMBOL_GPL(cxgbi_attr_is_visible);
2737 static int __init libcxgbi_init_module(void)
2739 pr_info("%s", version);
2741 BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, cb) <
2742 sizeof(struct cxgbi_skb_cb));
2746 static void __exit libcxgbi_exit_module(void)
2748 cxgbi_device_unregister_all(0xFF);
2752 module_init(libcxgbi_init_module);
2753 module_exit(libcxgbi_exit_module);