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 int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base,
68 unsigned int max_conn)
70 struct cxgbi_ports_map *pmap = &cdev->pmap;
72 pmap->port_csk = cxgbi_alloc_big_mem(max_conn *
73 sizeof(struct cxgbi_sock *),
75 if (!pmap->port_csk) {
76 pr_warn("cdev 0x%p, portmap OOM %u.\n", cdev, max_conn);
80 pmap->max_connect = max_conn;
81 pmap->sport_base = base;
82 spin_lock_init(&pmap->lock);
85 EXPORT_SYMBOL_GPL(cxgbi_device_portmap_create);
87 void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev)
89 struct cxgbi_ports_map *pmap = &cdev->pmap;
90 struct cxgbi_sock *csk;
93 for (i = 0; i < pmap->max_connect; i++) {
94 if (pmap->port_csk[i]) {
95 csk = pmap->port_csk[i];
96 pmap->port_csk[i] = NULL;
97 log_debug(1 << CXGBI_DBG_SOCK,
98 "csk 0x%p, cdev 0x%p, offload down.\n",
100 spin_lock_bh(&csk->lock);
101 cxgbi_sock_set_flag(csk, CTPF_OFFLOAD_DOWN);
102 cxgbi_sock_closed(csk);
103 spin_unlock_bh(&csk->lock);
108 EXPORT_SYMBOL_GPL(cxgbi_device_portmap_cleanup);
110 static inline void cxgbi_device_destroy(struct cxgbi_device *cdev)
112 log_debug(1 << CXGBI_DBG_DEV,
113 "cdev 0x%p, p# %u.\n", cdev, cdev->nports);
114 cxgbi_hbas_remove(cdev);
115 cxgbi_device_portmap_cleanup(cdev);
116 if (cdev->dev_ddp_cleanup)
117 cdev->dev_ddp_cleanup(cdev);
119 cxgbi_ddp_cleanup(cdev);
121 cxgbi_ddp_cleanup(cdev);
122 if (cdev->pmap.max_connect)
123 cxgbi_free_big_mem(cdev->pmap.port_csk);
127 struct cxgbi_device *cxgbi_device_register(unsigned int extra,
130 struct cxgbi_device *cdev;
132 cdev = kzalloc(sizeof(*cdev) + extra + nports *
133 (sizeof(struct cxgbi_hba *) +
134 sizeof(struct net_device *)),
137 pr_warn("nport %d, OOM.\n", nports);
140 cdev->ports = (struct net_device **)(cdev + 1);
141 cdev->hbas = (struct cxgbi_hba **)(((char*)cdev->ports) + nports *
142 sizeof(struct net_device *));
144 cdev->dd_data = ((char *)cdev->hbas) +
145 nports * sizeof(struct cxgbi_hba *);
146 spin_lock_init(&cdev->pmap.lock);
148 mutex_lock(&cdev_mutex);
149 list_add_tail(&cdev->list_head, &cdev_list);
150 mutex_unlock(&cdev_mutex);
152 spin_lock(&cdev_rcu_lock);
153 list_add_tail_rcu(&cdev->rcu_node, &cdev_rcu_list);
154 spin_unlock(&cdev_rcu_lock);
156 log_debug(1 << CXGBI_DBG_DEV,
157 "cdev 0x%p, p# %u.\n", cdev, nports);
160 EXPORT_SYMBOL_GPL(cxgbi_device_register);
162 void cxgbi_device_unregister(struct cxgbi_device *cdev)
164 log_debug(1 << CXGBI_DBG_DEV,
165 "cdev 0x%p, p# %u,%s.\n",
166 cdev, cdev->nports, cdev->nports ? cdev->ports[0]->name : "");
168 mutex_lock(&cdev_mutex);
169 list_del(&cdev->list_head);
170 mutex_unlock(&cdev_mutex);
172 spin_lock(&cdev_rcu_lock);
173 list_del_rcu(&cdev->rcu_node);
174 spin_unlock(&cdev_rcu_lock);
177 cxgbi_device_destroy(cdev);
179 EXPORT_SYMBOL_GPL(cxgbi_device_unregister);
181 void cxgbi_device_unregister_all(unsigned int flag)
183 struct cxgbi_device *cdev, *tmp;
185 mutex_lock(&cdev_mutex);
186 list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
187 if ((cdev->flags & flag) == flag) {
188 mutex_unlock(&cdev_mutex);
189 cxgbi_device_unregister(cdev);
190 mutex_lock(&cdev_mutex);
193 mutex_unlock(&cdev_mutex);
195 EXPORT_SYMBOL_GPL(cxgbi_device_unregister_all);
197 struct cxgbi_device *cxgbi_device_find_by_lldev(void *lldev)
199 struct cxgbi_device *cdev, *tmp;
201 mutex_lock(&cdev_mutex);
202 list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
203 if (cdev->lldev == lldev) {
204 mutex_unlock(&cdev_mutex);
208 mutex_unlock(&cdev_mutex);
210 log_debug(1 << CXGBI_DBG_DEV,
211 "lldev 0x%p, NO match found.\n", lldev);
214 EXPORT_SYMBOL_GPL(cxgbi_device_find_by_lldev);
216 struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev,
219 struct net_device *vdev = NULL;
220 struct cxgbi_device *cdev, *tmp;
223 if (ndev->priv_flags & IFF_802_1Q_VLAN) {
225 ndev = vlan_dev_real_dev(ndev);
226 log_debug(1 << CXGBI_DBG_DEV,
227 "vlan dev %s -> %s.\n", vdev->name, ndev->name);
230 mutex_lock(&cdev_mutex);
231 list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
232 for (i = 0; i < cdev->nports; i++) {
233 if (ndev == cdev->ports[i]) {
234 cdev->hbas[i]->vdev = vdev;
235 mutex_unlock(&cdev_mutex);
242 mutex_unlock(&cdev_mutex);
243 log_debug(1 << CXGBI_DBG_DEV,
244 "ndev 0x%p, %s, NO match found.\n", ndev, ndev->name);
247 EXPORT_SYMBOL_GPL(cxgbi_device_find_by_netdev);
249 struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *ndev,
252 struct net_device *vdev = NULL;
253 struct cxgbi_device *cdev;
256 if (ndev->priv_flags & IFF_802_1Q_VLAN) {
258 ndev = vlan_dev_real_dev(ndev);
259 pr_info("vlan dev %s -> %s.\n", vdev->name, ndev->name);
263 list_for_each_entry_rcu(cdev, &cdev_rcu_list, rcu_node) {
264 for (i = 0; i < cdev->nports; i++) {
265 if (ndev == cdev->ports[i]) {
266 cdev->hbas[i]->vdev = vdev;
276 log_debug(1 << CXGBI_DBG_DEV,
277 "ndev 0x%p, %s, NO match found.\n", ndev, ndev->name);
280 EXPORT_SYMBOL_GPL(cxgbi_device_find_by_netdev_rcu);
282 #if IS_ENABLED(CONFIG_IPV6)
283 static struct cxgbi_device *cxgbi_device_find_by_mac(struct net_device *ndev,
286 struct net_device *vdev = NULL;
287 struct cxgbi_device *cdev, *tmp;
290 if (ndev->priv_flags & IFF_802_1Q_VLAN) {
292 ndev = vlan_dev_real_dev(ndev);
293 pr_info("vlan dev %s -> %s.\n", vdev->name, ndev->name);
296 mutex_lock(&cdev_mutex);
297 list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
298 for (i = 0; i < cdev->nports; i++) {
299 if (!memcmp(ndev->dev_addr, cdev->ports[i]->dev_addr,
301 cdev->hbas[i]->vdev = vdev;
302 mutex_unlock(&cdev_mutex);
309 mutex_unlock(&cdev_mutex);
310 log_debug(1 << CXGBI_DBG_DEV,
311 "ndev 0x%p, %s, NO match mac found.\n",
317 void cxgbi_hbas_remove(struct cxgbi_device *cdev)
320 struct cxgbi_hba *chba;
322 log_debug(1 << CXGBI_DBG_DEV,
323 "cdev 0x%p, p#%u.\n", cdev, cdev->nports);
325 for (i = 0; i < cdev->nports; i++) {
326 chba = cdev->hbas[i];
328 cdev->hbas[i] = NULL;
329 iscsi_host_remove(chba->shost);
330 pci_dev_put(cdev->pdev);
331 iscsi_host_free(chba->shost);
335 EXPORT_SYMBOL_GPL(cxgbi_hbas_remove);
337 int cxgbi_hbas_add(struct cxgbi_device *cdev, u64 max_lun,
338 unsigned int max_id, struct scsi_host_template *sht,
339 struct scsi_transport_template *stt)
341 struct cxgbi_hba *chba;
342 struct Scsi_Host *shost;
345 log_debug(1 << CXGBI_DBG_DEV, "cdev 0x%p, p#%u.\n", cdev, cdev->nports);
347 for (i = 0; i < cdev->nports; i++) {
348 shost = iscsi_host_alloc(sht, sizeof(*chba), 1);
350 pr_info("0x%p, p%d, %s, host alloc failed.\n",
351 cdev, i, cdev->ports[i]->name);
356 shost->transportt = stt;
357 shost->max_lun = max_lun;
358 shost->max_id = max_id;
359 shost->max_channel = 0;
360 shost->max_cmd_len = 16;
362 chba = iscsi_host_priv(shost);
364 chba->ndev = cdev->ports[i];
367 log_debug(1 << CXGBI_DBG_DEV,
368 "cdev 0x%p, p#%d %s: chba 0x%p.\n",
369 cdev, i, cdev->ports[i]->name, chba);
371 pci_dev_get(cdev->pdev);
372 err = iscsi_host_add(shost, &cdev->pdev->dev);
374 pr_info("cdev 0x%p, p#%d %s, host add failed.\n",
375 cdev, i, cdev->ports[i]->name);
376 pci_dev_put(cdev->pdev);
377 scsi_host_put(shost);
381 cdev->hbas[i] = chba;
387 cxgbi_hbas_remove(cdev);
390 EXPORT_SYMBOL_GPL(cxgbi_hbas_add);
395 * - source port management
396 * To find a free source port in the port allocation map we use a very simple
397 * rotor scheme to look for the next free port.
399 * If a source port has been specified make sure that it doesn't collide with
400 * our normal source port allocation map. If it's outside the range of our
401 * allocation/deallocation scheme just let them use it.
403 * If the source port is outside our allocation range, the caller is
404 * responsible for keeping track of their port usage.
407 static struct cxgbi_sock *find_sock_on_port(struct cxgbi_device *cdev,
408 unsigned char port_id)
410 struct cxgbi_ports_map *pmap = &cdev->pmap;
414 if (!pmap->max_connect || !pmap->used)
417 spin_lock_bh(&pmap->lock);
419 for (i = 0; used && i < pmap->max_connect; i++) {
420 struct cxgbi_sock *csk = pmap->port_csk[i];
423 if (csk->port_id == port_id) {
424 spin_unlock_bh(&pmap->lock);
430 spin_unlock_bh(&pmap->lock);
435 static int sock_get_port(struct cxgbi_sock *csk)
437 struct cxgbi_device *cdev = csk->cdev;
438 struct cxgbi_ports_map *pmap = &cdev->pmap;
443 if (!pmap->max_connect) {
444 pr_err("cdev 0x%p, p#%u %s, NO port map.\n",
445 cdev, csk->port_id, cdev->ports[csk->port_id]->name);
446 return -EADDRNOTAVAIL;
449 if (csk->csk_family == AF_INET)
450 port = &csk->saddr.sin_port;
452 port = &csk->saddr6.sin6_port;
455 pr_err("source port NON-ZERO %u.\n",
460 spin_lock_bh(&pmap->lock);
461 if (pmap->used >= pmap->max_connect) {
462 spin_unlock_bh(&pmap->lock);
463 pr_info("cdev 0x%p, p#%u %s, ALL ports used.\n",
464 cdev, csk->port_id, cdev->ports[csk->port_id]->name);
465 return -EADDRNOTAVAIL;
468 start = idx = pmap->next;
470 if (++idx >= pmap->max_connect)
472 if (!pmap->port_csk[idx]) {
474 *port = htons(pmap->sport_base + idx);
476 pmap->port_csk[idx] = csk;
477 spin_unlock_bh(&pmap->lock);
479 log_debug(1 << CXGBI_DBG_SOCK,
480 "cdev 0x%p, p#%u %s, p %u, %u.\n",
482 cdev->ports[csk->port_id]->name,
483 pmap->sport_base + idx, pmap->next);
486 } while (idx != start);
487 spin_unlock_bh(&pmap->lock);
489 /* should not happen */
490 pr_warn("cdev 0x%p, p#%u %s, next %u?\n",
491 cdev, csk->port_id, cdev->ports[csk->port_id]->name,
493 return -EADDRNOTAVAIL;
496 static void sock_put_port(struct cxgbi_sock *csk)
498 struct cxgbi_device *cdev = csk->cdev;
499 struct cxgbi_ports_map *pmap = &cdev->pmap;
502 if (csk->csk_family == AF_INET)
503 port = &csk->saddr.sin_port;
505 port = &csk->saddr6.sin6_port;
508 int idx = ntohs(*port) - pmap->sport_base;
511 if (idx < 0 || idx >= pmap->max_connect) {
512 pr_err("cdev 0x%p, p#%u %s, port %u OOR.\n",
514 cdev->ports[csk->port_id]->name,
519 spin_lock_bh(&pmap->lock);
520 pmap->port_csk[idx] = NULL;
522 spin_unlock_bh(&pmap->lock);
524 log_debug(1 << CXGBI_DBG_SOCK,
525 "cdev 0x%p, p#%u %s, release %u.\n",
526 cdev, csk->port_id, cdev->ports[csk->port_id]->name,
527 pmap->sport_base + idx);
534 * iscsi tcp connection
536 void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *csk)
538 if (csk->cpl_close) {
539 kfree_skb(csk->cpl_close);
540 csk->cpl_close = NULL;
542 if (csk->cpl_abort_req) {
543 kfree_skb(csk->cpl_abort_req);
544 csk->cpl_abort_req = NULL;
546 if (csk->cpl_abort_rpl) {
547 kfree_skb(csk->cpl_abort_rpl);
548 csk->cpl_abort_rpl = NULL;
551 EXPORT_SYMBOL_GPL(cxgbi_sock_free_cpl_skbs);
553 static struct cxgbi_sock *cxgbi_sock_create(struct cxgbi_device *cdev)
555 struct cxgbi_sock *csk = kzalloc(sizeof(*csk), GFP_NOIO);
558 pr_info("alloc csk %zu failed.\n", sizeof(*csk));
562 if (cdev->csk_alloc_cpls(csk) < 0) {
563 pr_info("csk 0x%p, alloc cpls failed.\n", csk);
568 spin_lock_init(&csk->lock);
569 kref_init(&csk->refcnt);
570 skb_queue_head_init(&csk->receive_queue);
571 skb_queue_head_init(&csk->write_queue);
572 setup_timer(&csk->retry_timer, NULL, (unsigned long)csk);
573 rwlock_init(&csk->callback_lock);
576 cxgbi_sock_set_state(csk, CTP_CLOSED);
578 log_debug(1 << CXGBI_DBG_SOCK, "cdev 0x%p, new csk 0x%p.\n", cdev, csk);
583 static struct rtable *find_route_ipv4(struct flowi4 *fl4,
584 __be32 saddr, __be32 daddr,
585 __be16 sport, __be16 dport, u8 tos)
589 rt = ip_route_output_ports(&init_net, fl4, NULL, daddr, saddr,
590 dport, sport, IPPROTO_TCP, tos, 0);
597 static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr)
599 struct sockaddr_in *daddr = (struct sockaddr_in *)dst_addr;
600 struct dst_entry *dst;
601 struct net_device *ndev;
602 struct cxgbi_device *cdev;
603 struct rtable *rt = NULL;
606 struct cxgbi_sock *csk = NULL;
607 unsigned int mtu = 0;
611 rt = find_route_ipv4(&fl4, 0, daddr->sin_addr.s_addr, 0, daddr->sin_port, 0);
613 pr_info("no route to ipv4 0x%x, port %u.\n",
614 be32_to_cpu(daddr->sin_addr.s_addr),
615 be16_to_cpu(daddr->sin_port));
620 n = dst_neigh_lookup(dst, &daddr->sin_addr.s_addr);
627 if (rt->rt_flags & (RTCF_MULTICAST | RTCF_BROADCAST)) {
628 pr_info("multi-cast route %pI4, port %u, dev %s.\n",
629 &daddr->sin_addr.s_addr, ntohs(daddr->sin_port),
635 if (ndev->flags & IFF_LOOPBACK) {
636 ndev = ip_dev_find(&init_net, daddr->sin_addr.s_addr);
642 pr_info("rt dev %s, loopback -> %s, mtu %u.\n",
643 n->dev->name, ndev->name, mtu);
646 cdev = cxgbi_device_find_by_netdev(ndev, &port);
648 pr_info("dst %pI4, %s, NOT cxgbi device.\n",
649 &daddr->sin_addr.s_addr, ndev->name);
653 log_debug(1 << CXGBI_DBG_SOCK,
654 "route to %pI4 :%u, ndev p#%d,%s, cdev 0x%p.\n",
655 &daddr->sin_addr.s_addr, ntohs(daddr->sin_port),
656 port, ndev->name, cdev);
658 csk = cxgbi_sock_create(cdev);
668 csk->csk_family = AF_INET;
669 csk->daddr.sin_addr.s_addr = daddr->sin_addr.s_addr;
670 csk->daddr.sin_port = daddr->sin_port;
671 csk->daddr.sin_family = daddr->sin_family;
672 csk->saddr.sin_family = daddr->sin_family;
673 csk->saddr.sin_addr.s_addr = fl4.saddr;
684 cxgbi_sock_closed(csk);
689 #if IS_ENABLED(CONFIG_IPV6)
690 static struct rt6_info *find_route_ipv6(const struct in6_addr *saddr,
691 const struct in6_addr *daddr)
695 memset(&fl, 0, sizeof(fl));
697 memcpy(&fl.saddr, saddr, sizeof(struct in6_addr));
699 memcpy(&fl.daddr, daddr, sizeof(struct in6_addr));
700 return (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl);
703 static struct cxgbi_sock *cxgbi_check_route6(struct sockaddr *dst_addr)
705 struct sockaddr_in6 *daddr6 = (struct sockaddr_in6 *)dst_addr;
706 struct dst_entry *dst;
707 struct net_device *ndev;
708 struct cxgbi_device *cdev;
709 struct rt6_info *rt = NULL;
711 struct in6_addr pref_saddr;
712 struct cxgbi_sock *csk = NULL;
713 unsigned int mtu = 0;
717 rt = find_route_ipv6(NULL, &daddr6->sin6_addr);
720 pr_info("no route to ipv6 %pI6 port %u\n",
721 daddr6->sin6_addr.s6_addr,
722 be16_to_cpu(daddr6->sin6_port));
729 n = dst_neigh_lookup(dst, &daddr6->sin6_addr);
732 pr_info("%pI6, port %u, dst no neighbour.\n",
733 daddr6->sin6_addr.s6_addr,
734 be16_to_cpu(daddr6->sin6_port));
740 if (ipv6_addr_is_multicast(&daddr6->sin6_addr)) {
741 pr_info("multi-cast route %pI6 port %u, dev %s.\n",
742 daddr6->sin6_addr.s6_addr,
743 ntohs(daddr6->sin6_port), ndev->name);
748 cdev = cxgbi_device_find_by_netdev(ndev, &port);
750 cdev = cxgbi_device_find_by_mac(ndev, &port);
752 pr_info("dst %pI6 %s, NOT cxgbi device.\n",
753 daddr6->sin6_addr.s6_addr, ndev->name);
757 log_debug(1 << CXGBI_DBG_SOCK,
758 "route to %pI6 :%u, ndev p#%d,%s, cdev 0x%p.\n",
759 daddr6->sin6_addr.s6_addr, ntohs(daddr6->sin6_port), port,
762 csk = cxgbi_sock_create(cdev);
772 if (ipv6_addr_any(&rt->rt6i_prefsrc.addr)) {
773 struct inet6_dev *idev = ip6_dst_idev((struct dst_entry *)rt);
775 err = ipv6_dev_get_saddr(&init_net, idev ? idev->dev : NULL,
776 &daddr6->sin6_addr, 0, &pref_saddr);
778 pr_info("failed to get source address to reach %pI6\n",
783 pref_saddr = rt->rt6i_prefsrc.addr;
786 csk->csk_family = AF_INET6;
787 csk->daddr6.sin6_addr = daddr6->sin6_addr;
788 csk->daddr6.sin6_port = daddr6->sin6_port;
789 csk->daddr6.sin6_family = daddr6->sin6_family;
790 csk->saddr6.sin6_family = daddr6->sin6_family;
791 csk->saddr6.sin6_addr = pref_saddr;
802 cxgbi_sock_closed(csk);
806 #endif /* IS_ENABLED(CONFIG_IPV6) */
808 void cxgbi_sock_established(struct cxgbi_sock *csk, unsigned int snd_isn,
811 csk->write_seq = csk->snd_nxt = csk->snd_una = snd_isn;
812 dst_confirm(csk->dst);
814 cxgbi_sock_set_state(csk, CTP_ESTABLISHED);
816 EXPORT_SYMBOL_GPL(cxgbi_sock_established);
818 static void cxgbi_inform_iscsi_conn_closing(struct cxgbi_sock *csk)
820 log_debug(1 << CXGBI_DBG_SOCK,
821 "csk 0x%p, state %u, flags 0x%lx, conn 0x%p.\n",
822 csk, csk->state, csk->flags, csk->user_data);
824 if (csk->state != CTP_ESTABLISHED) {
825 read_lock_bh(&csk->callback_lock);
827 iscsi_conn_failure(csk->user_data,
828 ISCSI_ERR_TCP_CONN_CLOSE);
829 read_unlock_bh(&csk->callback_lock);
833 void cxgbi_sock_closed(struct cxgbi_sock *csk)
835 log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
836 csk, (csk)->state, (csk)->flags, (csk)->tid);
837 cxgbi_sock_set_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED);
838 if (csk->state == CTP_ACTIVE_OPEN || csk->state == CTP_CLOSED)
840 if (csk->saddr.sin_port)
843 dst_release(csk->dst);
844 csk->cdev->csk_release_offload_resources(csk);
845 cxgbi_sock_set_state(csk, CTP_CLOSED);
846 cxgbi_inform_iscsi_conn_closing(csk);
849 EXPORT_SYMBOL_GPL(cxgbi_sock_closed);
851 static void need_active_close(struct cxgbi_sock *csk)
856 log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
857 csk, (csk)->state, (csk)->flags, (csk)->tid);
858 spin_lock_bh(&csk->lock);
859 dst_confirm(csk->dst);
860 data_lost = skb_queue_len(&csk->receive_queue);
861 __skb_queue_purge(&csk->receive_queue);
863 if (csk->state == CTP_ACTIVE_OPEN)
864 cxgbi_sock_set_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED);
865 else if (csk->state == CTP_ESTABLISHED) {
867 cxgbi_sock_set_state(csk, CTP_ACTIVE_CLOSE);
868 } else if (csk->state == CTP_PASSIVE_CLOSE) {
870 cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_2);
875 csk->cdev->csk_send_abort_req(csk);
877 csk->cdev->csk_send_close_req(csk);
880 spin_unlock_bh(&csk->lock);
883 void cxgbi_sock_fail_act_open(struct cxgbi_sock *csk, int errno)
885 pr_info("csk 0x%p,%u,%lx, %pI4:%u-%pI4:%u, err %d.\n",
886 csk, csk->state, csk->flags,
887 &csk->saddr.sin_addr.s_addr, csk->saddr.sin_port,
888 &csk->daddr.sin_addr.s_addr, csk->daddr.sin_port,
891 cxgbi_sock_set_state(csk, CTP_CONNECTING);
893 cxgbi_sock_closed(csk);
895 EXPORT_SYMBOL_GPL(cxgbi_sock_fail_act_open);
897 void cxgbi_sock_act_open_req_arp_failure(void *handle, struct sk_buff *skb)
899 struct cxgbi_sock *csk = (struct cxgbi_sock *)skb->sk;
901 log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
902 csk, (csk)->state, (csk)->flags, (csk)->tid);
904 spin_lock_bh(&csk->lock);
905 if (csk->state == CTP_ACTIVE_OPEN)
906 cxgbi_sock_fail_act_open(csk, -EHOSTUNREACH);
907 spin_unlock_bh(&csk->lock);
911 EXPORT_SYMBOL_GPL(cxgbi_sock_act_open_req_arp_failure);
913 void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *csk)
916 spin_lock_bh(&csk->lock);
918 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_RCVD);
919 if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
920 cxgbi_sock_clear_flag(csk, CTPF_ABORT_RPL_PENDING);
921 if (cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD))
922 pr_err("csk 0x%p,%u,0x%lx,%u,ABT_RPL_RSS.\n",
923 csk, csk->state, csk->flags, csk->tid);
924 cxgbi_sock_closed(csk);
927 spin_unlock_bh(&csk->lock);
930 EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_abort_rpl);
932 void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *csk)
934 log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
935 csk, (csk)->state, (csk)->flags, (csk)->tid);
937 spin_lock_bh(&csk->lock);
939 if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING))
942 switch (csk->state) {
943 case CTP_ESTABLISHED:
944 cxgbi_sock_set_state(csk, CTP_PASSIVE_CLOSE);
946 case CTP_ACTIVE_CLOSE:
947 cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_2);
949 case CTP_CLOSE_WAIT_1:
950 cxgbi_sock_closed(csk);
955 pr_err("csk 0x%p,%u,0x%lx,%u, bad state.\n",
956 csk, csk->state, csk->flags, csk->tid);
958 cxgbi_inform_iscsi_conn_closing(csk);
960 spin_unlock_bh(&csk->lock);
963 EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_peer_close);
965 void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *csk, u32 snd_nxt)
967 log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
968 csk, (csk)->state, (csk)->flags, (csk)->tid);
970 spin_lock_bh(&csk->lock);
972 csk->snd_una = snd_nxt - 1;
973 if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING))
976 switch (csk->state) {
977 case CTP_ACTIVE_CLOSE:
978 cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_1);
980 case CTP_CLOSE_WAIT_1:
981 case CTP_CLOSE_WAIT_2:
982 cxgbi_sock_closed(csk);
987 pr_err("csk 0x%p,%u,0x%lx,%u, bad state.\n",
988 csk, csk->state, csk->flags, csk->tid);
991 spin_unlock_bh(&csk->lock);
994 EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_close_conn_rpl);
996 void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *csk, unsigned int credits,
997 unsigned int snd_una, int seq_chk)
999 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1000 "csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, snd_una %u,%d.\n",
1001 csk, csk->state, csk->flags, csk->tid, credits,
1002 csk->wr_cred, csk->wr_una_cred, snd_una, seq_chk);
1004 spin_lock_bh(&csk->lock);
1006 csk->wr_cred += credits;
1007 if (csk->wr_una_cred > csk->wr_max_cred - csk->wr_cred)
1008 csk->wr_una_cred = csk->wr_max_cred - csk->wr_cred;
1011 struct sk_buff *p = cxgbi_sock_peek_wr(csk);
1014 pr_err("csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, empty.\n",
1015 csk, csk->state, csk->flags, csk->tid, credits,
1016 csk->wr_cred, csk->wr_una_cred);
1020 if (unlikely(credits < p->csum)) {
1021 pr_warn("csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, < %u.\n",
1022 csk, csk->state, csk->flags, csk->tid,
1023 credits, csk->wr_cred, csk->wr_una_cred,
1028 cxgbi_sock_dequeue_wr(csk);
1034 cxgbi_sock_check_wr_invariants(csk);
1037 if (unlikely(before(snd_una, csk->snd_una))) {
1038 pr_warn("csk 0x%p,%u,0x%lx,%u, snd_una %u/%u.",
1039 csk, csk->state, csk->flags, csk->tid, snd_una,
1044 if (csk->snd_una != snd_una) {
1045 csk->snd_una = snd_una;
1046 dst_confirm(csk->dst);
1050 if (skb_queue_len(&csk->write_queue)) {
1051 if (csk->cdev->csk_push_tx_frames(csk, 0))
1052 cxgbi_conn_tx_open(csk);
1054 cxgbi_conn_tx_open(csk);
1056 spin_unlock_bh(&csk->lock);
1058 EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_wr_ack);
1060 static unsigned int cxgbi_sock_find_best_mtu(struct cxgbi_sock *csk,
1065 while (i < csk->cdev->nmtus - 1 && csk->cdev->mtus[i + 1] <= mtu)
1071 unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *csk, unsigned int pmtu)
1074 struct dst_entry *dst = csk->dst;
1076 csk->advmss = dst_metric_advmss(dst);
1078 if (csk->advmss > pmtu - 40)
1079 csk->advmss = pmtu - 40;
1080 if (csk->advmss < csk->cdev->mtus[0] - 40)
1081 csk->advmss = csk->cdev->mtus[0] - 40;
1082 idx = cxgbi_sock_find_best_mtu(csk, csk->advmss + 40);
1086 EXPORT_SYMBOL_GPL(cxgbi_sock_select_mss);
1088 void cxgbi_sock_skb_entail(struct cxgbi_sock *csk, struct sk_buff *skb)
1090 cxgbi_skcb_tcp_seq(skb) = csk->write_seq;
1091 __skb_queue_tail(&csk->write_queue, skb);
1093 EXPORT_SYMBOL_GPL(cxgbi_sock_skb_entail);
1095 void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *csk)
1097 struct sk_buff *skb;
1099 while ((skb = cxgbi_sock_dequeue_wr(csk)) != NULL)
1102 EXPORT_SYMBOL_GPL(cxgbi_sock_purge_wr_queue);
1104 void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *csk)
1106 int pending = cxgbi_sock_count_pending_wrs(csk);
1108 if (unlikely(csk->wr_cred + pending != csk->wr_max_cred))
1109 pr_err("csk 0x%p, tid %u, credit %u + %u != %u.\n",
1110 csk, csk->tid, csk->wr_cred, pending, csk->wr_max_cred);
1112 EXPORT_SYMBOL_GPL(cxgbi_sock_check_wr_invariants);
1114 static int cxgbi_sock_send_pdus(struct cxgbi_sock *csk, struct sk_buff *skb)
1116 struct cxgbi_device *cdev = csk->cdev;
1117 struct sk_buff *next;
1118 int err, copied = 0;
1120 spin_lock_bh(&csk->lock);
1122 if (csk->state != CTP_ESTABLISHED) {
1123 log_debug(1 << CXGBI_DBG_PDU_TX,
1124 "csk 0x%p,%u,0x%lx,%u, EAGAIN.\n",
1125 csk, csk->state, csk->flags, csk->tid);
1131 log_debug(1 << CXGBI_DBG_PDU_TX,
1132 "csk 0x%p,%u,0x%lx,%u, EPIPE %d.\n",
1133 csk, csk->state, csk->flags, csk->tid, csk->err);
1138 if (csk->write_seq - csk->snd_una >= csk->snd_win) {
1139 log_debug(1 << CXGBI_DBG_PDU_TX,
1140 "csk 0x%p,%u,0x%lx,%u, FULL %u-%u >= %u.\n",
1141 csk, csk->state, csk->flags, csk->tid, csk->write_seq,
1142 csk->snd_una, csk->snd_win);
1148 int frags = skb_shinfo(skb)->nr_frags +
1149 (skb->len != skb->data_len);
1151 if (unlikely(skb_headroom(skb) < cdev->skb_tx_rsvd)) {
1152 pr_err("csk 0x%p, skb head %u < %u.\n",
1153 csk, skb_headroom(skb), cdev->skb_tx_rsvd);
1158 if (frags >= SKB_WR_LIST_SIZE) {
1159 pr_err("csk 0x%p, frags %d, %u,%u >%u.\n",
1160 csk, skb_shinfo(skb)->nr_frags, skb->len,
1161 skb->data_len, (uint)(SKB_WR_LIST_SIZE));
1168 cxgbi_skcb_set_flag(skb, SKCBF_TX_NEED_HDR);
1169 cxgbi_sock_skb_entail(csk, skb);
1171 csk->write_seq += skb->len +
1172 cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
1176 if (likely(skb_queue_len(&csk->write_queue)))
1177 cdev->csk_push_tx_frames(csk, 1);
1178 spin_unlock_bh(&csk->lock);
1182 if (copied == 0 && err == -EPIPE)
1183 copied = csk->err ? csk->err : -EPIPE;
1190 * Direct Data Placement -
1191 * Directly place the iSCSI Data-In or Data-Out PDU's payload into pre-posted
1192 * final destination host-memory buffers based on the Initiator Task Tag (ITT)
1193 * in Data-In or Target Task Tag (TTT) in Data-Out PDUs.
1194 * The host memory address is programmed into h/w in the format of pagepod
1196 * The location of the pagepod entry is encoded into ddp tag which is used as
1197 * the base for ITT/TTT.
1200 static unsigned char ddp_page_order[DDP_PGIDX_MAX] = {0, 1, 2, 4};
1201 static unsigned char ddp_page_shift[DDP_PGIDX_MAX] = {12, 13, 14, 16};
1202 static unsigned char page_idx = DDP_PGIDX_MAX;
1204 static unsigned char sw_tag_idx_bits;
1205 static unsigned char sw_tag_age_bits;
1208 * Direct-Data Placement page size adjustment
1210 static int ddp_adjust_page_table(void)
1213 unsigned int base_order, order;
1215 if (PAGE_SIZE < (1UL << ddp_page_shift[0])) {
1216 pr_info("PAGE_SIZE 0x%lx too small, min 0x%lx\n",
1217 PAGE_SIZE, 1UL << ddp_page_shift[0]);
1221 base_order = get_order(1UL << ddp_page_shift[0]);
1222 order = get_order(1UL << PAGE_SHIFT);
1224 for (i = 0; i < DDP_PGIDX_MAX; i++) {
1225 /* first is the kernel page size, then just doubling */
1226 ddp_page_order[i] = order - base_order + i;
1227 ddp_page_shift[i] = PAGE_SHIFT + i;
1232 static int ddp_find_page_index(unsigned long pgsz)
1236 for (i = 0; i < DDP_PGIDX_MAX; i++) {
1237 if (pgsz == (1UL << ddp_page_shift[i]))
1240 pr_info("ddp page size %lu not supported.\n", pgsz);
1241 return DDP_PGIDX_MAX;
1244 static void ddp_setup_host_page_size(void)
1246 if (page_idx == DDP_PGIDX_MAX) {
1247 page_idx = ddp_find_page_index(PAGE_SIZE);
1249 if (page_idx == DDP_PGIDX_MAX) {
1250 pr_info("system PAGE %lu, update hw.\n", PAGE_SIZE);
1251 if (ddp_adjust_page_table() < 0) {
1252 pr_info("PAGE %lu, disable ddp.\n", PAGE_SIZE);
1255 page_idx = ddp_find_page_index(PAGE_SIZE);
1257 pr_info("system PAGE %lu, ddp idx %u.\n", PAGE_SIZE, page_idx);
1261 void cxgbi_ddp_page_size_factor(int *pgsz_factor)
1265 for (i = 0; i < DDP_PGIDX_MAX; i++)
1266 pgsz_factor[i] = ddp_page_order[i];
1268 EXPORT_SYMBOL_GPL(cxgbi_ddp_page_size_factor);
1271 * DDP setup & teardown
1274 void cxgbi_ddp_ppod_set(struct cxgbi_pagepod *ppod,
1275 struct cxgbi_pagepod_hdr *hdr,
1276 struct cxgbi_gather_list *gl, unsigned int gidx)
1280 memcpy(ppod, hdr, sizeof(*hdr));
1281 for (i = 0; i < (PPOD_PAGES_MAX + 1); i++, gidx++) {
1282 ppod->addr[i] = gidx < gl->nelem ?
1283 cpu_to_be64(gl->phys_addr[gidx]) : 0ULL;
1286 EXPORT_SYMBOL_GPL(cxgbi_ddp_ppod_set);
1288 void cxgbi_ddp_ppod_clear(struct cxgbi_pagepod *ppod)
1290 memset(ppod, 0, sizeof(*ppod));
1292 EXPORT_SYMBOL_GPL(cxgbi_ddp_ppod_clear);
1294 static inline int ddp_find_unused_entries(struct cxgbi_ddp_info *ddp,
1295 unsigned int start, unsigned int max,
1297 struct cxgbi_gather_list *gl)
1299 unsigned int i, j, k;
1301 /* not enough entries */
1302 if ((max - start) < count) {
1303 log_debug(1 << CXGBI_DBG_DDP,
1304 "NOT enough entries %u+%u < %u.\n", start, count, max);
1309 spin_lock(&ddp->map_lock);
1310 for (i = start; i < max;) {
1311 for (j = 0, k = i; j < count; j++, k++) {
1316 for (j = 0, k = i; j < count; j++, k++)
1317 ddp->gl_map[k] = gl;
1318 spin_unlock(&ddp->map_lock);
1323 spin_unlock(&ddp->map_lock);
1324 log_debug(1 << CXGBI_DBG_DDP,
1325 "NO suitable entries %u available.\n", count);
1329 static inline void ddp_unmark_entries(struct cxgbi_ddp_info *ddp,
1330 int start, int count)
1332 spin_lock(&ddp->map_lock);
1333 memset(&ddp->gl_map[start], 0,
1334 count * sizeof(struct cxgbi_gather_list *));
1335 spin_unlock(&ddp->map_lock);
1338 static inline void ddp_gl_unmap(struct pci_dev *pdev,
1339 struct cxgbi_gather_list *gl)
1343 for (i = 0; i < gl->nelem; i++)
1344 dma_unmap_page(&pdev->dev, gl->phys_addr[i], PAGE_SIZE,
1345 PCI_DMA_FROMDEVICE);
1348 static inline int ddp_gl_map(struct pci_dev *pdev,
1349 struct cxgbi_gather_list *gl)
1353 for (i = 0; i < gl->nelem; i++) {
1354 gl->phys_addr[i] = dma_map_page(&pdev->dev, gl->pages[i], 0,
1356 PCI_DMA_FROMDEVICE);
1357 if (unlikely(dma_mapping_error(&pdev->dev, gl->phys_addr[i]))) {
1358 log_debug(1 << CXGBI_DBG_DDP,
1359 "page %d 0x%p, 0x%p dma mapping err.\n",
1360 i, gl->pages[i], pdev);
1367 unsigned int nelem = gl->nelem;
1370 ddp_gl_unmap(pdev, gl);
1376 static void ddp_release_gl(struct cxgbi_gather_list *gl,
1377 struct pci_dev *pdev)
1379 ddp_gl_unmap(pdev, gl);
1383 static struct cxgbi_gather_list *ddp_make_gl(unsigned int xferlen,
1384 struct scatterlist *sgl,
1386 struct pci_dev *pdev,
1389 struct cxgbi_gather_list *gl;
1390 struct scatterlist *sg = sgl;
1391 struct page *sgpage = sg_page(sg);
1392 unsigned int sglen = sg->length;
1393 unsigned int sgoffset = sg->offset;
1394 unsigned int npages = (xferlen + sgoffset + PAGE_SIZE - 1) >>
1398 if (xferlen < DDP_THRESHOLD) {
1399 log_debug(1 << CXGBI_DBG_DDP,
1400 "xfer %u < threshold %u, no ddp.\n",
1401 xferlen, DDP_THRESHOLD);
1405 gl = kzalloc(sizeof(struct cxgbi_gather_list) +
1406 npages * (sizeof(dma_addr_t) +
1407 sizeof(struct page *)), gfp);
1409 log_debug(1 << CXGBI_DBG_DDP,
1410 "xfer %u, %u pages, OOM.\n", xferlen, npages);
1414 log_debug(1 << CXGBI_DBG_DDP,
1415 "xfer %u, sgl %u, gl max %u.\n", xferlen, sgcnt, npages);
1417 gl->pages = (struct page **)&gl->phys_addr[npages];
1419 gl->length = xferlen;
1420 gl->offset = sgoffset;
1421 gl->pages[0] = sgpage;
1423 for (i = 1, sg = sg_next(sgl), j = 0; i < sgcnt;
1424 i++, sg = sg_next(sg)) {
1425 struct page *page = sg_page(sg);
1427 if (sgpage == page && sg->offset == sgoffset + sglen)
1428 sglen += sg->length;
1430 /* make sure the sgl is fit for ddp:
1431 * each has the same page size, and
1432 * all of the middle pages are used completely
1434 if ((j && sgoffset) || ((i != sgcnt - 1) &&
1435 ((sglen + sgoffset) & ~PAGE_MASK))) {
1436 log_debug(1 << CXGBI_DBG_DDP,
1437 "page %d/%u, %u + %u.\n",
1438 i, sgcnt, sgoffset, sglen);
1443 if (j == gl->nelem || sg->offset) {
1444 log_debug(1 << CXGBI_DBG_DDP,
1445 "page %d/%u, offset %u.\n",
1446 j, gl->nelem, sg->offset);
1449 gl->pages[j] = page;
1451 sgoffset = sg->offset;
1457 if (ddp_gl_map(pdev, gl) < 0)
1467 static void ddp_tag_release(struct cxgbi_hba *chba, u32 tag)
1469 struct cxgbi_device *cdev = chba->cdev;
1470 struct cxgbi_ddp_info *ddp = cdev->ddp;
1473 idx = (tag >> PPOD_IDX_SHIFT) & ddp->idx_mask;
1474 if (idx < ddp->nppods) {
1475 struct cxgbi_gather_list *gl = ddp->gl_map[idx];
1478 if (!gl || !gl->nelem) {
1479 pr_warn("tag 0x%x, idx %u, gl 0x%p, %u.\n",
1480 tag, idx, gl, gl ? gl->nelem : 0);
1483 npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT;
1484 log_debug(1 << CXGBI_DBG_DDP,
1485 "tag 0x%x, release idx %u, npods %u.\n",
1487 cdev->csk_ddp_clear(chba, tag, idx, npods);
1488 ddp_unmark_entries(ddp, idx, npods);
1489 ddp_release_gl(gl, ddp->pdev);
1491 pr_warn("tag 0x%x, idx %u > max %u.\n", tag, idx, ddp->nppods);
1494 static int ddp_tag_reserve(struct cxgbi_sock *csk, unsigned int tid,
1495 u32 sw_tag, u32 *tagp, struct cxgbi_gather_list *gl,
1498 struct cxgbi_device *cdev = csk->cdev;
1499 struct cxgbi_ddp_info *ddp = cdev->ddp;
1500 struct cxgbi_tag_format *tformat = &cdev->tag_format;
1501 struct cxgbi_pagepod_hdr hdr;
1507 npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT;
1508 if (ddp->idx_last == ddp->nppods)
1509 idx = ddp_find_unused_entries(ddp, 0, ddp->nppods,
1512 idx = ddp_find_unused_entries(ddp, ddp->idx_last + 1,
1515 if (idx < 0 && ddp->idx_last >= npods) {
1516 idx = ddp_find_unused_entries(ddp, 0,
1517 min(ddp->idx_last + npods, ddp->nppods),
1522 log_debug(1 << CXGBI_DBG_DDP,
1523 "xferlen %u, gl %u, npods %u NO DDP.\n",
1524 gl->length, gl->nelem, npods);
1528 tag = cxgbi_ddp_tag_base(tformat, sw_tag);
1529 tag |= idx << PPOD_IDX_SHIFT;
1532 hdr.vld_tid = htonl(PPOD_VALID_FLAG | PPOD_TID(tid));
1533 hdr.pgsz_tag_clr = htonl(tag & ddp->rsvd_tag_mask);
1534 hdr.max_offset = htonl(gl->length);
1535 hdr.page_offset = htonl(gl->offset);
1537 err = cdev->csk_ddp_set(csk, &hdr, idx, npods, gl);
1539 goto unmark_entries;
1541 ddp->idx_last = idx;
1542 log_debug(1 << CXGBI_DBG_DDP,
1543 "xfer %u, gl %u,%u, tid 0x%x, tag 0x%x->0x%x(%u,%u).\n",
1544 gl->length, gl->nelem, gl->offset, tid, sw_tag, tag, idx,
1550 ddp_unmark_entries(ddp, idx, npods);
1554 int cxgbi_ddp_reserve(struct cxgbi_sock *csk, unsigned int *tagp,
1555 unsigned int sw_tag, unsigned int xferlen,
1556 struct scatterlist *sgl, unsigned int sgcnt, gfp_t gfp)
1558 struct cxgbi_device *cdev = csk->cdev;
1559 struct cxgbi_tag_format *tformat = &cdev->tag_format;
1560 struct cxgbi_gather_list *gl;
1563 if (page_idx >= DDP_PGIDX_MAX || !cdev->ddp ||
1564 xferlen < DDP_THRESHOLD) {
1565 log_debug(1 << CXGBI_DBG_DDP,
1566 "pgidx %u, xfer %u, NO ddp.\n", page_idx, xferlen);
1570 if (!cxgbi_sw_tag_usable(tformat, sw_tag)) {
1571 log_debug(1 << CXGBI_DBG_DDP,
1572 "sw_tag 0x%x NOT usable.\n", sw_tag);
1576 gl = ddp_make_gl(xferlen, sgl, sgcnt, cdev->pdev, gfp);
1580 err = ddp_tag_reserve(csk, csk->tid, sw_tag, tagp, gl, gfp);
1582 ddp_release_gl(gl, cdev->pdev);
1587 static void ddp_destroy(struct kref *kref)
1589 struct cxgbi_ddp_info *ddp = container_of(kref,
1590 struct cxgbi_ddp_info,
1592 struct cxgbi_device *cdev = ddp->cdev;
1595 pr_info("kref 0, destroy ddp 0x%p, cdev 0x%p.\n", ddp, cdev);
1597 while (i < ddp->nppods) {
1598 struct cxgbi_gather_list *gl = ddp->gl_map[i];
1601 int npods = (gl->nelem + PPOD_PAGES_MAX - 1)
1602 >> PPOD_PAGES_SHIFT;
1603 pr_info("cdev 0x%p, ddp %d + %d.\n", cdev, i, npods);
1609 cxgbi_free_big_mem(ddp);
1612 int cxgbi_ddp_cleanup(struct cxgbi_device *cdev)
1614 struct cxgbi_ddp_info *ddp = cdev->ddp;
1616 log_debug(1 << CXGBI_DBG_DDP,
1617 "cdev 0x%p, release ddp 0x%p.\n", cdev, ddp);
1620 return kref_put(&ddp->refcnt, ddp_destroy);
1623 EXPORT_SYMBOL_GPL(cxgbi_ddp_cleanup);
1625 int cxgbi_ddp_init(struct cxgbi_device *cdev,
1626 unsigned int llimit, unsigned int ulimit,
1627 unsigned int max_txsz, unsigned int max_rxsz)
1629 struct cxgbi_ddp_info *ddp;
1630 unsigned int ppmax, bits;
1632 ppmax = (ulimit - llimit + 1) >> PPOD_SIZE_SHIFT;
1633 bits = __ilog2_u32(ppmax) + 1;
1634 if (bits > PPOD_IDX_MAX_SIZE)
1635 bits = PPOD_IDX_MAX_SIZE;
1636 ppmax = (1 << (bits - 1)) - 1;
1638 ddp = cxgbi_alloc_big_mem(sizeof(struct cxgbi_ddp_info) +
1639 ppmax * (sizeof(struct cxgbi_gather_list *) +
1640 sizeof(struct sk_buff *)),
1643 pr_warn("cdev 0x%p, ddp ppmax %u OOM.\n", cdev, ppmax);
1646 ddp->gl_map = (struct cxgbi_gather_list **)(ddp + 1);
1649 spin_lock_init(&ddp->map_lock);
1650 kref_init(&ddp->refcnt);
1653 ddp->pdev = cdev->pdev;
1654 ddp->llimit = llimit;
1655 ddp->ulimit = ulimit;
1656 ddp->max_txsz = min_t(unsigned int, max_txsz, ULP2_MAX_PKT_SIZE);
1657 ddp->max_rxsz = min_t(unsigned int, max_rxsz, ULP2_MAX_PKT_SIZE);
1658 ddp->nppods = ppmax;
1659 ddp->idx_last = ppmax;
1660 ddp->idx_bits = bits;
1661 ddp->idx_mask = (1 << bits) - 1;
1662 ddp->rsvd_tag_mask = (1 << (bits + PPOD_IDX_SHIFT)) - 1;
1664 cdev->tag_format.sw_bits = sw_tag_idx_bits + sw_tag_age_bits;
1665 cdev->tag_format.rsvd_bits = ddp->idx_bits;
1666 cdev->tag_format.rsvd_shift = PPOD_IDX_SHIFT;
1667 cdev->tag_format.rsvd_mask = (1 << cdev->tag_format.rsvd_bits) - 1;
1669 pr_info("%s tag format, sw %u, rsvd %u,%u, mask 0x%x.\n",
1670 cdev->ports[0]->name, cdev->tag_format.sw_bits,
1671 cdev->tag_format.rsvd_bits, cdev->tag_format.rsvd_shift,
1672 cdev->tag_format.rsvd_mask);
1674 cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
1675 ddp->max_txsz - ISCSI_PDU_NONPAYLOAD_LEN);
1676 cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
1677 ddp->max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN);
1679 log_debug(1 << CXGBI_DBG_DDP,
1680 "%s max payload size: %u/%u, %u/%u.\n",
1681 cdev->ports[0]->name, cdev->tx_max_size, ddp->max_txsz,
1682 cdev->rx_max_size, ddp->max_rxsz);
1685 EXPORT_SYMBOL_GPL(cxgbi_ddp_init);
1688 * APIs interacting with open-iscsi libraries
1691 static unsigned char padding[4];
1693 static void task_release_itt(struct iscsi_task *task, itt_t hdr_itt)
1695 struct scsi_cmnd *sc = task->sc;
1696 struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
1697 struct cxgbi_conn *cconn = tcp_conn->dd_data;
1698 struct cxgbi_hba *chba = cconn->chba;
1699 struct cxgbi_tag_format *tformat = &chba->cdev->tag_format;
1700 u32 tag = ntohl((__force u32)hdr_itt);
1702 log_debug(1 << CXGBI_DBG_DDP,
1703 "cdev 0x%p, release tag 0x%x.\n", chba->cdev, tag);
1705 (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE) &&
1706 cxgbi_is_ddp_tag(tformat, tag))
1707 ddp_tag_release(chba, tag);
1710 static int task_reserve_itt(struct iscsi_task *task, itt_t *hdr_itt)
1712 struct scsi_cmnd *sc = task->sc;
1713 struct iscsi_conn *conn = task->conn;
1714 struct iscsi_session *sess = conn->session;
1715 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
1716 struct cxgbi_conn *cconn = tcp_conn->dd_data;
1717 struct cxgbi_hba *chba = cconn->chba;
1718 struct cxgbi_tag_format *tformat = &chba->cdev->tag_format;
1719 u32 sw_tag = (sess->age << cconn->task_idx_bits) | task->itt;
1724 (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE)) {
1725 err = cxgbi_ddp_reserve(cconn->cep->csk, &tag, sw_tag,
1726 scsi_in(sc)->length,
1727 scsi_in(sc)->table.sgl,
1728 scsi_in(sc)->table.nents,
1731 log_debug(1 << CXGBI_DBG_DDP,
1732 "csk 0x%p, R task 0x%p, %u,%u, no ddp.\n",
1733 cconn->cep->csk, task, scsi_in(sc)->length,
1734 scsi_in(sc)->table.nents);
1738 tag = cxgbi_set_non_ddp_tag(tformat, sw_tag);
1739 /* the itt need to sent in big-endian order */
1740 *hdr_itt = (__force itt_t)htonl(tag);
1742 log_debug(1 << CXGBI_DBG_DDP,
1743 "cdev 0x%p, task 0x%p, 0x%x(0x%x,0x%x)->0x%x/0x%x.\n",
1744 chba->cdev, task, sw_tag, task->itt, sess->age, tag, *hdr_itt);
1748 void cxgbi_parse_pdu_itt(struct iscsi_conn *conn, itt_t itt, int *idx, int *age)
1750 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
1751 struct cxgbi_conn *cconn = tcp_conn->dd_data;
1752 struct cxgbi_device *cdev = cconn->chba->cdev;
1753 u32 tag = ntohl((__force u32) itt);
1756 sw_bits = cxgbi_tag_nonrsvd_bits(&cdev->tag_format, tag);
1758 *idx = sw_bits & ((1 << cconn->task_idx_bits) - 1);
1760 *age = (sw_bits >> cconn->task_idx_bits) & ISCSI_AGE_MASK;
1762 log_debug(1 << CXGBI_DBG_DDP,
1763 "cdev 0x%p, tag 0x%x/0x%x, -> 0x%x(0x%x,0x%x).\n",
1764 cdev, tag, itt, sw_bits, idx ? *idx : 0xFFFFF,
1767 EXPORT_SYMBOL_GPL(cxgbi_parse_pdu_itt);
1769 void cxgbi_conn_tx_open(struct cxgbi_sock *csk)
1771 struct iscsi_conn *conn = csk->user_data;
1774 log_debug(1 << CXGBI_DBG_SOCK,
1775 "csk 0x%p, cid %d.\n", csk, conn->id);
1776 iscsi_conn_queue_work(conn);
1779 EXPORT_SYMBOL_GPL(cxgbi_conn_tx_open);
1782 * pdu receive, interact with libiscsi_tcp
1784 static inline int read_pdu_skb(struct iscsi_conn *conn,
1785 struct sk_buff *skb,
1786 unsigned int offset,
1792 bytes_read = iscsi_tcp_recv_skb(conn, skb, offset, offloaded, &status);
1794 case ISCSI_TCP_CONN_ERR:
1795 pr_info("skb 0x%p, off %u, %d, TCP_ERR.\n",
1796 skb, offset, offloaded);
1798 case ISCSI_TCP_SUSPENDED:
1799 log_debug(1 << CXGBI_DBG_PDU_RX,
1800 "skb 0x%p, off %u, %d, TCP_SUSPEND, rc %d.\n",
1801 skb, offset, offloaded, bytes_read);
1802 /* no transfer - just have caller flush queue */
1804 case ISCSI_TCP_SKB_DONE:
1805 pr_info("skb 0x%p, off %u, %d, TCP_SKB_DONE.\n",
1806 skb, offset, offloaded);
1808 * pdus should always fit in the skb and we should get
1809 * segment done notifcation.
1811 iscsi_conn_printk(KERN_ERR, conn, "Invalid pdu or skb.");
1813 case ISCSI_TCP_SEGMENT_DONE:
1814 log_debug(1 << CXGBI_DBG_PDU_RX,
1815 "skb 0x%p, off %u, %d, TCP_SEG_DONE, rc %d.\n",
1816 skb, offset, offloaded, bytes_read);
1819 pr_info("skb 0x%p, off %u, %d, invalid status %d.\n",
1820 skb, offset, offloaded, status);
1825 static int skb_read_pdu_bhs(struct iscsi_conn *conn, struct sk_buff *skb)
1827 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
1829 log_debug(1 << CXGBI_DBG_PDU_RX,
1830 "conn 0x%p, skb 0x%p, len %u, flag 0x%lx.\n",
1831 conn, skb, skb->len, cxgbi_skcb_flags(skb));
1833 if (!iscsi_tcp_recv_segment_is_hdr(tcp_conn)) {
1834 pr_info("conn 0x%p, skb 0x%p, not hdr.\n", conn, skb);
1835 iscsi_conn_failure(conn, ISCSI_ERR_PROTO);
1839 if (conn->hdrdgst_en &&
1840 cxgbi_skcb_test_flag(skb, SKCBF_RX_HCRC_ERR)) {
1841 pr_info("conn 0x%p, skb 0x%p, hcrc.\n", conn, skb);
1842 iscsi_conn_failure(conn, ISCSI_ERR_HDR_DGST);
1846 return read_pdu_skb(conn, skb, 0, 0);
1849 static int skb_read_pdu_data(struct iscsi_conn *conn, struct sk_buff *lskb,
1850 struct sk_buff *skb, unsigned int offset)
1852 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
1854 int opcode = tcp_conn->in.hdr->opcode & ISCSI_OPCODE_MASK;
1856 log_debug(1 << CXGBI_DBG_PDU_RX,
1857 "conn 0x%p, skb 0x%p, len %u, flag 0x%lx.\n",
1858 conn, skb, skb->len, cxgbi_skcb_flags(skb));
1860 if (conn->datadgst_en &&
1861 cxgbi_skcb_test_flag(lskb, SKCBF_RX_DCRC_ERR)) {
1862 pr_info("conn 0x%p, skb 0x%p, dcrc 0x%lx.\n",
1863 conn, lskb, cxgbi_skcb_flags(lskb));
1864 iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
1868 if (iscsi_tcp_recv_segment_is_hdr(tcp_conn))
1871 /* coalesced, add header digest length */
1872 if (lskb == skb && conn->hdrdgst_en)
1873 offset += ISCSI_DIGEST_SIZE;
1875 if (cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA_DDPD))
1878 if (opcode == ISCSI_OP_SCSI_DATA_IN)
1879 log_debug(1 << CXGBI_DBG_PDU_RX,
1880 "skb 0x%p, op 0x%x, itt 0x%x, %u %s ddp'ed.\n",
1881 skb, opcode, ntohl(tcp_conn->in.hdr->itt),
1882 tcp_conn->in.datalen, offloaded ? "is" : "not");
1884 return read_pdu_skb(conn, skb, offset, offloaded);
1887 static void csk_return_rx_credits(struct cxgbi_sock *csk, int copied)
1889 struct cxgbi_device *cdev = csk->cdev;
1893 log_debug(1 << CXGBI_DBG_PDU_RX,
1894 "csk 0x%p,%u,0x%lx,%u, seq %u, wup %u, thre %u, %u.\n",
1895 csk, csk->state, csk->flags, csk->tid, csk->copied_seq,
1896 csk->rcv_wup, cdev->rx_credit_thres,
1899 if (csk->state != CTP_ESTABLISHED)
1902 credits = csk->copied_seq - csk->rcv_wup;
1903 if (unlikely(!credits))
1905 if (unlikely(cdev->rx_credit_thres == 0))
1908 must_send = credits + 16384 >= csk->rcv_win;
1909 if (must_send || credits >= cdev->rx_credit_thres)
1910 csk->rcv_wup += cdev->csk_send_rx_credits(csk, credits);
1913 void cxgbi_conn_pdu_ready(struct cxgbi_sock *csk)
1915 struct cxgbi_device *cdev = csk->cdev;
1916 struct iscsi_conn *conn = csk->user_data;
1917 struct sk_buff *skb;
1918 unsigned int read = 0;
1921 log_debug(1 << CXGBI_DBG_PDU_RX,
1922 "csk 0x%p, conn 0x%p.\n", csk, conn);
1924 if (unlikely(!conn || conn->suspend_rx)) {
1925 log_debug(1 << CXGBI_DBG_PDU_RX,
1926 "csk 0x%p, conn 0x%p, id %d, suspend_rx %lu!\n",
1927 csk, conn, conn ? conn->id : 0xFF,
1928 conn ? conn->suspend_rx : 0xFF);
1933 skb = skb_peek(&csk->receive_queue);
1935 !(cxgbi_skcb_test_flag(skb, SKCBF_RX_STATUS))) {
1937 log_debug(1 << CXGBI_DBG_PDU_RX,
1938 "skb 0x%p, NOT ready 0x%lx.\n",
1939 skb, cxgbi_skcb_flags(skb));
1942 __skb_unlink(skb, &csk->receive_queue);
1944 read += cxgbi_skcb_rx_pdulen(skb);
1945 log_debug(1 << CXGBI_DBG_PDU_RX,
1946 "csk 0x%p, skb 0x%p,%u,f 0x%lx, pdu len %u.\n",
1947 csk, skb, skb->len, cxgbi_skcb_flags(skb),
1948 cxgbi_skcb_rx_pdulen(skb));
1950 if (cxgbi_skcb_test_flag(skb, SKCBF_RX_COALESCED)) {
1951 err = skb_read_pdu_bhs(conn, skb);
1953 pr_err("coalesced bhs, csk 0x%p, skb 0x%p,%u, "
1954 "f 0x%lx, plen %u.\n",
1956 cxgbi_skcb_flags(skb),
1957 cxgbi_skcb_rx_pdulen(skb));
1960 err = skb_read_pdu_data(conn, skb, skb,
1961 err + cdev->skb_rx_extra);
1963 pr_err("coalesced data, csk 0x%p, skb 0x%p,%u, "
1964 "f 0x%lx, plen %u.\n",
1966 cxgbi_skcb_flags(skb),
1967 cxgbi_skcb_rx_pdulen(skb));
1969 err = skb_read_pdu_bhs(conn, skb);
1971 pr_err("bhs, csk 0x%p, skb 0x%p,%u, "
1972 "f 0x%lx, plen %u.\n",
1974 cxgbi_skcb_flags(skb),
1975 cxgbi_skcb_rx_pdulen(skb));
1979 if (cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) {
1980 struct sk_buff *dskb;
1982 dskb = skb_peek(&csk->receive_queue);
1984 pr_err("csk 0x%p, skb 0x%p,%u, f 0x%lx,"
1985 " plen %u, NO data.\n",
1987 cxgbi_skcb_flags(skb),
1988 cxgbi_skcb_rx_pdulen(skb));
1992 __skb_unlink(dskb, &csk->receive_queue);
1994 err = skb_read_pdu_data(conn, skb, dskb, 0);
1996 pr_err("data, csk 0x%p, skb 0x%p,%u, "
1997 "f 0x%lx, plen %u, dskb 0x%p,"
2000 cxgbi_skcb_flags(skb),
2001 cxgbi_skcb_rx_pdulen(skb),
2005 err = skb_read_pdu_data(conn, skb, skb, 0);
2014 log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, read %u.\n", csk, read);
2016 csk->copied_seq += read;
2017 csk_return_rx_credits(csk, read);
2018 conn->rxdata_octets += read;
2022 pr_info("csk 0x%p, 0x%p, rx failed %d, read %u.\n",
2023 csk, conn, err, read);
2024 iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
2027 EXPORT_SYMBOL_GPL(cxgbi_conn_pdu_ready);
2029 static int sgl_seek_offset(struct scatterlist *sgl, unsigned int sgcnt,
2030 unsigned int offset, unsigned int *off,
2031 struct scatterlist **sgp)
2034 struct scatterlist *sg;
2036 for_each_sg(sgl, sg, sgcnt, i) {
2037 if (offset < sg->length) {
2042 offset -= sg->length;
2047 static int sgl_read_to_frags(struct scatterlist *sg, unsigned int sgoffset,
2048 unsigned int dlen, struct page_frag *frags,
2051 unsigned int datalen = dlen;
2052 unsigned int sglen = sg->length - sgoffset;
2053 struct page *page = sg_page(sg);
2063 pr_warn("sg %d NULL, len %u/%u.\n",
2072 copy = min(datalen, sglen);
2073 if (i && page == frags[i - 1].page &&
2074 sgoffset + sg->offset ==
2075 frags[i - 1].offset + frags[i - 1].size) {
2076 frags[i - 1].size += copy;
2078 if (i >= frag_max) {
2079 pr_warn("too many pages %u, dlen %u.\n",
2084 frags[i].page = page;
2085 frags[i].offset = sg->offset + sgoffset;
2086 frags[i].size = copy;
2097 int cxgbi_conn_alloc_pdu(struct iscsi_task *task, u8 opcode)
2099 struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
2100 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2101 struct cxgbi_device *cdev = cconn->chba->cdev;
2102 struct iscsi_conn *conn = task->conn;
2103 struct iscsi_tcp_task *tcp_task = task->dd_data;
2104 struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
2105 struct scsi_cmnd *sc = task->sc;
2106 int headroom = SKB_TX_ISCSI_PDU_HEADER_MAX;
2108 tcp_task->dd_data = tdata;
2111 if (SKB_MAX_HEAD(cdev->skb_tx_rsvd) > (512 * MAX_SKB_FRAGS) &&
2112 (opcode == ISCSI_OP_SCSI_DATA_OUT ||
2113 (opcode == ISCSI_OP_SCSI_CMD &&
2114 (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_TO_DEVICE))))
2115 /* data could goes into skb head */
2116 headroom += min_t(unsigned int,
2117 SKB_MAX_HEAD(cdev->skb_tx_rsvd),
2118 conn->max_xmit_dlength);
2120 tdata->skb = alloc_skb(cdev->skb_tx_rsvd + headroom, GFP_ATOMIC);
2122 struct cxgbi_sock *csk = cconn->cep->csk;
2123 struct net_device *ndev = cdev->ports[csk->port_id];
2124 ndev->stats.tx_dropped++;
2128 skb_reserve(tdata->skb, cdev->skb_tx_rsvd);
2129 task->hdr = (struct iscsi_hdr *)tdata->skb->data;
2130 task->hdr_max = SKB_TX_ISCSI_PDU_HEADER_MAX; /* BHS + AHS */
2132 /* data_out uses scsi_cmd's itt */
2133 if (opcode != ISCSI_OP_SCSI_DATA_OUT)
2134 task_reserve_itt(task, &task->hdr->itt);
2136 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
2137 "task 0x%p, op 0x%x, skb 0x%p,%u+%u/%u, itt 0x%x.\n",
2138 task, opcode, tdata->skb, cdev->skb_tx_rsvd, headroom,
2139 conn->max_xmit_dlength, ntohl(task->hdr->itt));
2143 EXPORT_SYMBOL_GPL(cxgbi_conn_alloc_pdu);
2145 static inline void tx_skb_setmode(struct sk_buff *skb, int hcrc, int dcrc)
2154 cxgbi_skcb_ulp_mode(skb) = (ULP2_MODE_ISCSI << 4) | submode;
2156 cxgbi_skcb_ulp_mode(skb) = 0;
2159 int cxgbi_conn_init_pdu(struct iscsi_task *task, unsigned int offset,
2162 struct iscsi_conn *conn = task->conn;
2163 struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
2164 struct sk_buff *skb = tdata->skb;
2165 unsigned int datalen = count;
2166 int i, padlen = iscsi_padding(count);
2169 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
2170 "task 0x%p,0x%p, skb 0x%p, 0x%x,0x%x,0x%x, %u+%u.\n",
2171 task, task->sc, skb, (*skb->data) & ISCSI_OPCODE_MASK,
2172 ntohl(task->cmdsn), ntohl(task->hdr->itt), offset, count);
2174 skb_put(skb, task->hdr_len);
2175 tx_skb_setmode(skb, conn->hdrdgst_en, datalen ? conn->datadgst_en : 0);
2180 struct scsi_data_buffer *sdb = scsi_out(task->sc);
2181 struct scatterlist *sg = NULL;
2184 tdata->offset = offset;
2185 tdata->count = count;
2186 err = sgl_seek_offset(
2187 sdb->table.sgl, sdb->table.nents,
2188 tdata->offset, &tdata->sgoffset, &sg);
2190 pr_warn("tpdu, sgl %u, bad offset %u/%u.\n",
2191 sdb->table.nents, tdata->offset, sdb->length);
2194 err = sgl_read_to_frags(sg, tdata->sgoffset, tdata->count,
2195 tdata->frags, MAX_PDU_FRAGS);
2197 pr_warn("tpdu, sgl %u, bad offset %u + %u.\n",
2198 sdb->table.nents, tdata->offset, tdata->count);
2201 tdata->nr_frags = err;
2203 if (tdata->nr_frags > MAX_SKB_FRAGS ||
2204 (padlen && tdata->nr_frags == MAX_SKB_FRAGS)) {
2205 char *dst = skb->data + task->hdr_len;
2206 struct page_frag *frag = tdata->frags;
2208 /* data fits in the skb's headroom */
2209 for (i = 0; i < tdata->nr_frags; i++, frag++) {
2210 char *src = kmap_atomic(frag->page);
2212 memcpy(dst, src+frag->offset, frag->size);
2217 memset(dst, 0, padlen);
2220 skb_put(skb, count + padlen);
2222 /* data fit into frag_list */
2223 for (i = 0; i < tdata->nr_frags; i++) {
2224 __skb_fill_page_desc(skb, i,
2225 tdata->frags[i].page,
2226 tdata->frags[i].offset,
2227 tdata->frags[i].size);
2228 skb_frag_ref(skb, i);
2230 skb_shinfo(skb)->nr_frags = tdata->nr_frags;
2232 skb->data_len += count;
2233 skb->truesize += count;
2237 pg = virt_to_page(task->data);
2240 skb_fill_page_desc(skb, 0, pg, offset_in_page(task->data),
2243 skb->data_len += count;
2244 skb->truesize += count;
2248 i = skb_shinfo(skb)->nr_frags;
2249 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
2250 virt_to_page(padding), offset_in_page(padding),
2253 skb->data_len += padlen;
2254 skb->truesize += padlen;
2260 EXPORT_SYMBOL_GPL(cxgbi_conn_init_pdu);
2262 int cxgbi_conn_xmit_pdu(struct iscsi_task *task)
2264 struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
2265 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2266 struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
2267 struct sk_buff *skb = tdata->skb;
2268 unsigned int datalen;
2272 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
2273 "task 0x%p, skb NULL.\n", task);
2277 datalen = skb->data_len;
2279 err = cxgbi_sock_send_pdus(cconn->cep->csk, skb);
2283 log_debug(1 << CXGBI_DBG_PDU_TX,
2284 "task 0x%p,0x%p, skb 0x%p, len %u/%u, rv %d.\n",
2285 task, task->sc, skb, skb->len, skb->data_len, err);
2287 if (task->conn->hdrdgst_en)
2288 pdulen += ISCSI_DIGEST_SIZE;
2290 if (datalen && task->conn->datadgst_en)
2291 pdulen += ISCSI_DIGEST_SIZE;
2293 task->conn->txdata_octets += pdulen;
2297 if (err == -EAGAIN || err == -ENOBUFS) {
2298 log_debug(1 << CXGBI_DBG_PDU_TX,
2299 "task 0x%p, skb 0x%p, len %u/%u, %d EAGAIN.\n",
2300 task, skb, skb->len, skb->data_len, err);
2301 /* reset skb to send when we are called again */
2306 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
2307 "itt 0x%x, skb 0x%p, len %u/%u, xmit err %d.\n",
2308 task->itt, skb, skb->len, skb->data_len, err);
2312 iscsi_conn_printk(KERN_ERR, task->conn, "xmit err %d.\n", err);
2313 iscsi_conn_failure(task->conn, ISCSI_ERR_XMIT_FAILED);
2316 EXPORT_SYMBOL_GPL(cxgbi_conn_xmit_pdu);
2318 void cxgbi_cleanup_task(struct iscsi_task *task)
2320 struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
2322 log_debug(1 << CXGBI_DBG_ISCSI,
2323 "task 0x%p, skb 0x%p, itt 0x%x.\n",
2324 task, tdata->skb, task->hdr_itt);
2326 /* never reached the xmit task callout */
2328 __kfree_skb(tdata->skb);
2329 memset(tdata, 0, sizeof(*tdata));
2331 task_release_itt(task, task->hdr_itt);
2332 iscsi_tcp_cleanup_task(task);
2334 EXPORT_SYMBOL_GPL(cxgbi_cleanup_task);
2336 void cxgbi_get_conn_stats(struct iscsi_cls_conn *cls_conn,
2337 struct iscsi_stats *stats)
2339 struct iscsi_conn *conn = cls_conn->dd_data;
2341 stats->txdata_octets = conn->txdata_octets;
2342 stats->rxdata_octets = conn->rxdata_octets;
2343 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
2344 stats->dataout_pdus = conn->dataout_pdus_cnt;
2345 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
2346 stats->datain_pdus = conn->datain_pdus_cnt;
2347 stats->r2t_pdus = conn->r2t_pdus_cnt;
2348 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
2349 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
2350 stats->digest_err = 0;
2351 stats->timeout_err = 0;
2352 stats->custom_length = 1;
2353 strcpy(stats->custom[0].desc, "eh_abort_cnt");
2354 stats->custom[0].value = conn->eh_abort_cnt;
2356 EXPORT_SYMBOL_GPL(cxgbi_get_conn_stats);
2358 static int cxgbi_conn_max_xmit_dlength(struct iscsi_conn *conn)
2360 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
2361 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2362 struct cxgbi_device *cdev = cconn->chba->cdev;
2363 unsigned int headroom = SKB_MAX_HEAD(cdev->skb_tx_rsvd);
2364 unsigned int max_def = 512 * MAX_SKB_FRAGS;
2365 unsigned int max = max(max_def, headroom);
2367 max = min(cconn->chba->cdev->tx_max_size, max);
2368 if (conn->max_xmit_dlength)
2369 conn->max_xmit_dlength = min(conn->max_xmit_dlength, max);
2371 conn->max_xmit_dlength = max;
2372 cxgbi_align_pdu_size(conn->max_xmit_dlength);
2377 static int cxgbi_conn_max_recv_dlength(struct iscsi_conn *conn)
2379 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
2380 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2381 unsigned int max = cconn->chba->cdev->rx_max_size;
2383 cxgbi_align_pdu_size(max);
2385 if (conn->max_recv_dlength) {
2386 if (conn->max_recv_dlength > max) {
2387 pr_err("MaxRecvDataSegmentLength %u > %u.\n",
2388 conn->max_recv_dlength, max);
2391 conn->max_recv_dlength = min(conn->max_recv_dlength, max);
2392 cxgbi_align_pdu_size(conn->max_recv_dlength);
2394 conn->max_recv_dlength = max;
2399 int cxgbi_set_conn_param(struct iscsi_cls_conn *cls_conn,
2400 enum iscsi_param param, char *buf, int buflen)
2402 struct iscsi_conn *conn = cls_conn->dd_data;
2403 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
2404 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2405 struct cxgbi_sock *csk = cconn->cep->csk;
2408 log_debug(1 << CXGBI_DBG_ISCSI,
2409 "cls_conn 0x%p, param %d, buf(%d) %s.\n",
2410 cls_conn, param, buflen, buf);
2413 case ISCSI_PARAM_HDRDGST_EN:
2414 err = iscsi_set_param(cls_conn, param, buf, buflen);
2415 if (!err && conn->hdrdgst_en)
2416 err = csk->cdev->csk_ddp_setup_digest(csk, csk->tid,
2418 conn->datadgst_en, 0);
2420 case ISCSI_PARAM_DATADGST_EN:
2421 err = iscsi_set_param(cls_conn, param, buf, buflen);
2422 if (!err && conn->datadgst_en)
2423 err = csk->cdev->csk_ddp_setup_digest(csk, csk->tid,
2425 conn->datadgst_en, 0);
2427 case ISCSI_PARAM_MAX_R2T:
2428 return iscsi_tcp_set_max_r2t(conn, buf);
2429 case ISCSI_PARAM_MAX_RECV_DLENGTH:
2430 err = iscsi_set_param(cls_conn, param, buf, buflen);
2432 err = cxgbi_conn_max_recv_dlength(conn);
2434 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
2435 err = iscsi_set_param(cls_conn, param, buf, buflen);
2437 err = cxgbi_conn_max_xmit_dlength(conn);
2440 return iscsi_set_param(cls_conn, param, buf, buflen);
2444 EXPORT_SYMBOL_GPL(cxgbi_set_conn_param);
2446 static inline int csk_print_port(struct cxgbi_sock *csk, char *buf)
2450 cxgbi_sock_get(csk);
2451 len = sprintf(buf, "%hu\n", ntohs(csk->daddr.sin_port));
2452 cxgbi_sock_put(csk);
2457 static inline int csk_print_ip(struct cxgbi_sock *csk, char *buf)
2461 cxgbi_sock_get(csk);
2462 if (csk->csk_family == AF_INET)
2463 len = sprintf(buf, "%pI4",
2464 &csk->daddr.sin_addr.s_addr);
2466 len = sprintf(buf, "%pI6",
2467 &csk->daddr6.sin6_addr);
2469 cxgbi_sock_put(csk);
2474 int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param param,
2477 struct cxgbi_endpoint *cep = ep->dd_data;
2478 struct cxgbi_sock *csk;
2481 log_debug(1 << CXGBI_DBG_ISCSI,
2482 "cls_conn 0x%p, param %d.\n", ep, param);
2485 case ISCSI_PARAM_CONN_PORT:
2486 case ISCSI_PARAM_CONN_ADDRESS:
2494 return iscsi_conn_get_addr_param((struct sockaddr_storage *)
2495 &csk->daddr, param, buf);
2501 EXPORT_SYMBOL_GPL(cxgbi_get_ep_param);
2503 struct iscsi_cls_conn *
2504 cxgbi_create_conn(struct iscsi_cls_session *cls_session, u32 cid)
2506 struct iscsi_cls_conn *cls_conn;
2507 struct iscsi_conn *conn;
2508 struct iscsi_tcp_conn *tcp_conn;
2509 struct cxgbi_conn *cconn;
2511 cls_conn = iscsi_tcp_conn_setup(cls_session, sizeof(*cconn), cid);
2515 conn = cls_conn->dd_data;
2516 tcp_conn = conn->dd_data;
2517 cconn = tcp_conn->dd_data;
2518 cconn->iconn = conn;
2520 log_debug(1 << CXGBI_DBG_ISCSI,
2521 "cid %u(0x%x), cls 0x%p,0x%p, conn 0x%p,0x%p,0x%p.\n",
2522 cid, cid, cls_session, cls_conn, conn, tcp_conn, cconn);
2526 EXPORT_SYMBOL_GPL(cxgbi_create_conn);
2528 int cxgbi_bind_conn(struct iscsi_cls_session *cls_session,
2529 struct iscsi_cls_conn *cls_conn,
2530 u64 transport_eph, int is_leading)
2532 struct iscsi_conn *conn = cls_conn->dd_data;
2533 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
2534 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2535 struct iscsi_endpoint *ep;
2536 struct cxgbi_endpoint *cep;
2537 struct cxgbi_sock *csk;
2540 ep = iscsi_lookup_endpoint(transport_eph);
2544 /* setup ddp pagesize */
2547 err = csk->cdev->csk_ddp_setup_pgidx(csk, csk->tid, page_idx, 0);
2551 err = iscsi_conn_bind(cls_session, cls_conn, is_leading);
2555 /* calculate the tag idx bits needed for this conn based on cmds_max */
2556 cconn->task_idx_bits = (__ilog2_u32(conn->session->cmds_max - 1)) + 1;
2558 write_lock_bh(&csk->callback_lock);
2559 csk->user_data = conn;
2560 cconn->chba = cep->chba;
2563 write_unlock_bh(&csk->callback_lock);
2565 cxgbi_conn_max_xmit_dlength(conn);
2566 cxgbi_conn_max_recv_dlength(conn);
2568 log_debug(1 << CXGBI_DBG_ISCSI,
2569 "cls 0x%p,0x%p, ep 0x%p, cconn 0x%p, csk 0x%p.\n",
2570 cls_session, cls_conn, ep, cconn, csk);
2571 /* init recv engine */
2572 iscsi_tcp_hdr_recv_prep(tcp_conn);
2576 EXPORT_SYMBOL_GPL(cxgbi_bind_conn);
2578 struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *ep,
2579 u16 cmds_max, u16 qdepth,
2582 struct cxgbi_endpoint *cep;
2583 struct cxgbi_hba *chba;
2584 struct Scsi_Host *shost;
2585 struct iscsi_cls_session *cls_session;
2586 struct iscsi_session *session;
2589 pr_err("missing endpoint.\n");
2595 shost = chba->shost;
2597 BUG_ON(chba != iscsi_host_priv(shost));
2599 cls_session = iscsi_session_setup(chba->cdev->itp, shost,
2601 sizeof(struct iscsi_tcp_task) +
2602 sizeof(struct cxgbi_task_data),
2603 initial_cmdsn, ISCSI_MAX_TARGET);
2607 session = cls_session->dd_data;
2608 if (iscsi_tcp_r2tpool_alloc(session))
2609 goto remove_session;
2611 log_debug(1 << CXGBI_DBG_ISCSI,
2612 "ep 0x%p, cls sess 0x%p.\n", ep, cls_session);
2616 iscsi_session_teardown(cls_session);
2619 EXPORT_SYMBOL_GPL(cxgbi_create_session);
2621 void cxgbi_destroy_session(struct iscsi_cls_session *cls_session)
2623 log_debug(1 << CXGBI_DBG_ISCSI,
2624 "cls sess 0x%p.\n", cls_session);
2626 iscsi_tcp_r2tpool_free(cls_session->dd_data);
2627 iscsi_session_teardown(cls_session);
2629 EXPORT_SYMBOL_GPL(cxgbi_destroy_session);
2631 int cxgbi_set_host_param(struct Scsi_Host *shost, enum iscsi_host_param param,
2632 char *buf, int buflen)
2634 struct cxgbi_hba *chba = iscsi_host_priv(shost);
2637 shost_printk(KERN_ERR, shost, "Could not get host param. "
2638 "netdev for host not set.\n");
2642 log_debug(1 << CXGBI_DBG_ISCSI,
2643 "shost 0x%p, hba 0x%p,%s, param %d, buf(%d) %s.\n",
2644 shost, chba, chba->ndev->name, param, buflen, buf);
2647 case ISCSI_HOST_PARAM_IPADDRESS:
2649 __be32 addr = in_aton(buf);
2650 log_debug(1 << CXGBI_DBG_ISCSI,
2651 "hba %s, req. ipv4 %pI4.\n", chba->ndev->name, &addr);
2652 cxgbi_set_iscsi_ipv4(chba, addr);
2655 case ISCSI_HOST_PARAM_HWADDRESS:
2656 case ISCSI_HOST_PARAM_NETDEV_NAME:
2659 return iscsi_host_set_param(shost, param, buf, buflen);
2662 EXPORT_SYMBOL_GPL(cxgbi_set_host_param);
2664 int cxgbi_get_host_param(struct Scsi_Host *shost, enum iscsi_host_param param,
2667 struct cxgbi_hba *chba = iscsi_host_priv(shost);
2671 shost_printk(KERN_ERR, shost, "Could not get host param. "
2672 "netdev for host not set.\n");
2676 log_debug(1 << CXGBI_DBG_ISCSI,
2677 "shost 0x%p, hba 0x%p,%s, param %d.\n",
2678 shost, chba, chba->ndev->name, param);
2681 case ISCSI_HOST_PARAM_HWADDRESS:
2682 len = sysfs_format_mac(buf, chba->ndev->dev_addr, 6);
2684 case ISCSI_HOST_PARAM_NETDEV_NAME:
2685 len = sprintf(buf, "%s\n", chba->ndev->name);
2687 case ISCSI_HOST_PARAM_IPADDRESS:
2689 struct cxgbi_sock *csk = find_sock_on_port(chba->cdev,
2692 len = sprintf(buf, "%pIS",
2693 (struct sockaddr *)&csk->saddr);
2695 log_debug(1 << CXGBI_DBG_ISCSI,
2696 "hba %s, addr %s.\n", chba->ndev->name, buf);
2700 return iscsi_host_get_param(shost, param, buf);
2705 EXPORT_SYMBOL_GPL(cxgbi_get_host_param);
2707 struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *shost,
2708 struct sockaddr *dst_addr,
2711 struct iscsi_endpoint *ep;
2712 struct cxgbi_endpoint *cep;
2713 struct cxgbi_hba *hba = NULL;
2714 struct cxgbi_sock *csk;
2717 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK,
2718 "shost 0x%p, non_blocking %d, dst_addr 0x%p.\n",
2719 shost, non_blocking, dst_addr);
2722 hba = iscsi_host_priv(shost);
2724 pr_info("shost 0x%p, priv NULL.\n", shost);
2729 if (dst_addr->sa_family == AF_INET) {
2730 csk = cxgbi_check_route(dst_addr);
2731 #if IS_ENABLED(CONFIG_IPV6)
2732 } else if (dst_addr->sa_family == AF_INET6) {
2733 csk = cxgbi_check_route6(dst_addr);
2736 pr_info("address family 0x%x NOT supported.\n",
2737 dst_addr->sa_family);
2738 err = -EAFNOSUPPORT;
2739 return (struct iscsi_endpoint *)ERR_PTR(err);
2743 return (struct iscsi_endpoint *)csk;
2744 cxgbi_sock_get(csk);
2747 hba = csk->cdev->hbas[csk->port_id];
2748 else if (hba != csk->cdev->hbas[csk->port_id]) {
2749 pr_info("Could not connect through requested host %u"
2750 "hba 0x%p != 0x%p (%u).\n",
2751 shost->host_no, hba,
2752 csk->cdev->hbas[csk->port_id], csk->port_id);
2757 err = sock_get_port(csk);
2761 cxgbi_sock_set_state(csk, CTP_CONNECTING);
2762 err = csk->cdev->csk_init_act_open(csk);
2766 if (cxgbi_sock_is_closing(csk)) {
2768 pr_info("csk 0x%p is closing.\n", csk);
2772 ep = iscsi_create_endpoint(sizeof(*cep));
2775 pr_info("iscsi alloc ep, OOM.\n");
2783 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK,
2784 "ep 0x%p, cep 0x%p, csk 0x%p, hba 0x%p,%s.\n",
2785 ep, cep, csk, hba, hba->ndev->name);
2789 cxgbi_sock_put(csk);
2790 cxgbi_sock_closed(csk);
2792 return ERR_PTR(err);
2794 EXPORT_SYMBOL_GPL(cxgbi_ep_connect);
2796 int cxgbi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
2798 struct cxgbi_endpoint *cep = ep->dd_data;
2799 struct cxgbi_sock *csk = cep->csk;
2801 if (!cxgbi_sock_is_established(csk))
2805 EXPORT_SYMBOL_GPL(cxgbi_ep_poll);
2807 void cxgbi_ep_disconnect(struct iscsi_endpoint *ep)
2809 struct cxgbi_endpoint *cep = ep->dd_data;
2810 struct cxgbi_conn *cconn = cep->cconn;
2811 struct cxgbi_sock *csk = cep->csk;
2813 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK,
2814 "ep 0x%p, cep 0x%p, cconn 0x%p, csk 0x%p,%u,0x%lx.\n",
2815 ep, cep, cconn, csk, csk->state, csk->flags);
2817 if (cconn && cconn->iconn) {
2818 iscsi_suspend_tx(cconn->iconn);
2819 write_lock_bh(&csk->callback_lock);
2820 cep->csk->user_data = NULL;
2822 write_unlock_bh(&csk->callback_lock);
2824 iscsi_destroy_endpoint(ep);
2826 if (likely(csk->state >= CTP_ESTABLISHED))
2827 need_active_close(csk);
2829 cxgbi_sock_closed(csk);
2831 cxgbi_sock_put(csk);
2833 EXPORT_SYMBOL_GPL(cxgbi_ep_disconnect);
2835 int cxgbi_iscsi_init(struct iscsi_transport *itp,
2836 struct scsi_transport_template **stt)
2838 *stt = iscsi_register_transport(itp);
2840 pr_err("unable to register %s transport 0x%p.\n",
2844 log_debug(1 << CXGBI_DBG_ISCSI,
2845 "%s, registered iscsi transport 0x%p.\n",
2849 EXPORT_SYMBOL_GPL(cxgbi_iscsi_init);
2851 void cxgbi_iscsi_cleanup(struct iscsi_transport *itp,
2852 struct scsi_transport_template **stt)
2855 log_debug(1 << CXGBI_DBG_ISCSI,
2856 "de-register transport 0x%p, %s, stt 0x%p.\n",
2857 itp, itp->name, *stt);
2859 iscsi_unregister_transport(itp);
2862 EXPORT_SYMBOL_GPL(cxgbi_iscsi_cleanup);
2864 umode_t cxgbi_attr_is_visible(int param_type, int param)
2866 switch (param_type) {
2867 case ISCSI_HOST_PARAM:
2869 case ISCSI_HOST_PARAM_NETDEV_NAME:
2870 case ISCSI_HOST_PARAM_HWADDRESS:
2871 case ISCSI_HOST_PARAM_IPADDRESS:
2872 case ISCSI_HOST_PARAM_INITIATOR_NAME:
2879 case ISCSI_PARAM_MAX_RECV_DLENGTH:
2880 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
2881 case ISCSI_PARAM_HDRDGST_EN:
2882 case ISCSI_PARAM_DATADGST_EN:
2883 case ISCSI_PARAM_CONN_ADDRESS:
2884 case ISCSI_PARAM_CONN_PORT:
2885 case ISCSI_PARAM_EXP_STATSN:
2886 case ISCSI_PARAM_PERSISTENT_ADDRESS:
2887 case ISCSI_PARAM_PERSISTENT_PORT:
2888 case ISCSI_PARAM_PING_TMO:
2889 case ISCSI_PARAM_RECV_TMO:
2890 case ISCSI_PARAM_INITIAL_R2T_EN:
2891 case ISCSI_PARAM_MAX_R2T:
2892 case ISCSI_PARAM_IMM_DATA_EN:
2893 case ISCSI_PARAM_FIRST_BURST:
2894 case ISCSI_PARAM_MAX_BURST:
2895 case ISCSI_PARAM_PDU_INORDER_EN:
2896 case ISCSI_PARAM_DATASEQ_INORDER_EN:
2897 case ISCSI_PARAM_ERL:
2898 case ISCSI_PARAM_TARGET_NAME:
2899 case ISCSI_PARAM_TPGT:
2900 case ISCSI_PARAM_USERNAME:
2901 case ISCSI_PARAM_PASSWORD:
2902 case ISCSI_PARAM_USERNAME_IN:
2903 case ISCSI_PARAM_PASSWORD_IN:
2904 case ISCSI_PARAM_FAST_ABORT:
2905 case ISCSI_PARAM_ABORT_TMO:
2906 case ISCSI_PARAM_LU_RESET_TMO:
2907 case ISCSI_PARAM_TGT_RESET_TMO:
2908 case ISCSI_PARAM_IFACE_NAME:
2909 case ISCSI_PARAM_INITIATOR_NAME:
2918 EXPORT_SYMBOL_GPL(cxgbi_attr_is_visible);
2920 static int __init libcxgbi_init_module(void)
2922 sw_tag_idx_bits = (__ilog2_u32(ISCSI_ITT_MASK)) + 1;
2923 sw_tag_age_bits = (__ilog2_u32(ISCSI_AGE_MASK)) + 1;
2925 pr_info("%s", version);
2927 pr_info("tag itt 0x%x, %u bits, age 0x%x, %u bits.\n",
2928 ISCSI_ITT_MASK, sw_tag_idx_bits,
2929 ISCSI_AGE_MASK, sw_tag_age_bits);
2931 ddp_setup_host_page_size();
2935 static void __exit libcxgbi_exit_module(void)
2937 cxgbi_device_unregister_all(0xFF);
2941 module_init(libcxgbi_init_module);
2942 module_exit(libcxgbi_exit_module);