2 * libcxgbi.c: Chelsio common library for T3/T4 iSCSI driver.
4 * Copyright (c) 2010 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 "0.9.0"
42 #define DRV_MODULE_RELDATE "Jun. 2010"
44 MODULE_AUTHOR("Chelsio Communications, Inc.");
45 MODULE_DESCRIPTION(DRV_MODULE_DESC);
46 MODULE_VERSION(DRV_MODULE_VERSION);
47 MODULE_LICENSE("GPL");
49 module_param(dbg_level, uint, 0644);
50 MODULE_PARM_DESC(dbg_level, "libiscsi debug level (default=0)");
54 * cxgbi device management
55 * maintains a list of the cxgbi devices
57 static LIST_HEAD(cdev_list);
58 static DEFINE_MUTEX(cdev_mutex);
60 static LIST_HEAD(cdev_rcu_list);
61 static DEFINE_SPINLOCK(cdev_rcu_lock);
63 int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base,
64 unsigned int max_conn)
66 struct cxgbi_ports_map *pmap = &cdev->pmap;
68 pmap->port_csk = cxgbi_alloc_big_mem(max_conn *
69 sizeof(struct cxgbi_sock *),
71 if (!pmap->port_csk) {
72 pr_warn("cdev 0x%p, portmap OOM %u.\n", cdev, max_conn);
76 pmap->max_connect = max_conn;
77 pmap->sport_base = base;
78 spin_lock_init(&pmap->lock);
81 EXPORT_SYMBOL_GPL(cxgbi_device_portmap_create);
83 void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev)
85 struct cxgbi_ports_map *pmap = &cdev->pmap;
86 struct cxgbi_sock *csk;
89 for (i = 0; i < pmap->max_connect; i++) {
90 if (pmap->port_csk[i]) {
91 csk = pmap->port_csk[i];
92 pmap->port_csk[i] = NULL;
93 log_debug(1 << CXGBI_DBG_SOCK,
94 "csk 0x%p, cdev 0x%p, offload down.\n",
96 spin_lock_bh(&csk->lock);
97 cxgbi_sock_set_flag(csk, CTPF_OFFLOAD_DOWN);
98 cxgbi_sock_closed(csk);
99 spin_unlock_bh(&csk->lock);
104 EXPORT_SYMBOL_GPL(cxgbi_device_portmap_cleanup);
106 static inline void cxgbi_device_destroy(struct cxgbi_device *cdev)
108 log_debug(1 << CXGBI_DBG_DEV,
109 "cdev 0x%p, p# %u.\n", cdev, cdev->nports);
110 cxgbi_hbas_remove(cdev);
111 cxgbi_device_portmap_cleanup(cdev);
112 if (cdev->dev_ddp_cleanup)
113 cdev->dev_ddp_cleanup(cdev);
115 cxgbi_ddp_cleanup(cdev);
117 cxgbi_ddp_cleanup(cdev);
118 if (cdev->pmap.max_connect)
119 cxgbi_free_big_mem(cdev->pmap.port_csk);
123 struct cxgbi_device *cxgbi_device_register(unsigned int extra,
126 struct cxgbi_device *cdev;
128 cdev = kzalloc(sizeof(*cdev) + extra + nports *
129 (sizeof(struct cxgbi_hba *) +
130 sizeof(struct net_device *)),
133 pr_warn("nport %d, OOM.\n", nports);
136 cdev->ports = (struct net_device **)(cdev + 1);
137 cdev->hbas = (struct cxgbi_hba **)(((char*)cdev->ports) + nports *
138 sizeof(struct net_device *));
140 cdev->dd_data = ((char *)cdev->hbas) +
141 nports * sizeof(struct cxgbi_hba *);
142 spin_lock_init(&cdev->pmap.lock);
144 mutex_lock(&cdev_mutex);
145 list_add_tail(&cdev->list_head, &cdev_list);
146 mutex_unlock(&cdev_mutex);
148 spin_lock(&cdev_rcu_lock);
149 list_add_tail_rcu(&cdev->rcu_node, &cdev_rcu_list);
150 spin_unlock(&cdev_rcu_lock);
152 log_debug(1 << CXGBI_DBG_DEV,
153 "cdev 0x%p, p# %u.\n", cdev, nports);
156 EXPORT_SYMBOL_GPL(cxgbi_device_register);
158 void cxgbi_device_unregister(struct cxgbi_device *cdev)
160 log_debug(1 << CXGBI_DBG_DEV,
161 "cdev 0x%p, p# %u,%s.\n",
162 cdev, cdev->nports, cdev->nports ? cdev->ports[0]->name : "");
164 mutex_lock(&cdev_mutex);
165 list_del(&cdev->list_head);
166 mutex_unlock(&cdev_mutex);
168 spin_lock(&cdev_rcu_lock);
169 list_del_rcu(&cdev->rcu_node);
170 spin_unlock(&cdev_rcu_lock);
173 cxgbi_device_destroy(cdev);
175 EXPORT_SYMBOL_GPL(cxgbi_device_unregister);
177 void cxgbi_device_unregister_all(unsigned int flag)
179 struct cxgbi_device *cdev, *tmp;
181 mutex_lock(&cdev_mutex);
182 list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
183 if ((cdev->flags & flag) == flag) {
184 mutex_unlock(&cdev_mutex);
185 cxgbi_device_unregister(cdev);
186 mutex_lock(&cdev_mutex);
189 mutex_unlock(&cdev_mutex);
191 EXPORT_SYMBOL_GPL(cxgbi_device_unregister_all);
193 struct cxgbi_device *cxgbi_device_find_by_lldev(void *lldev)
195 struct cxgbi_device *cdev, *tmp;
197 mutex_lock(&cdev_mutex);
198 list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
199 if (cdev->lldev == lldev) {
200 mutex_unlock(&cdev_mutex);
204 mutex_unlock(&cdev_mutex);
206 log_debug(1 << CXGBI_DBG_DEV,
207 "lldev 0x%p, NO match found.\n", lldev);
210 EXPORT_SYMBOL_GPL(cxgbi_device_find_by_lldev);
212 struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev,
215 struct net_device *vdev = NULL;
216 struct cxgbi_device *cdev, *tmp;
219 if (ndev->priv_flags & IFF_802_1Q_VLAN) {
221 ndev = vlan_dev_real_dev(ndev);
222 log_debug(1 << CXGBI_DBG_DEV,
223 "vlan dev %s -> %s.\n", vdev->name, ndev->name);
226 mutex_lock(&cdev_mutex);
227 list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
228 for (i = 0; i < cdev->nports; i++) {
229 if (ndev == cdev->ports[i]) {
230 cdev->hbas[i]->vdev = vdev;
231 mutex_unlock(&cdev_mutex);
238 mutex_unlock(&cdev_mutex);
239 log_debug(1 << CXGBI_DBG_DEV,
240 "ndev 0x%p, %s, NO match found.\n", ndev, ndev->name);
243 EXPORT_SYMBOL_GPL(cxgbi_device_find_by_netdev);
245 struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *ndev,
248 struct net_device *vdev = NULL;
249 struct cxgbi_device *cdev;
252 if (ndev->priv_flags & IFF_802_1Q_VLAN) {
254 ndev = vlan_dev_real_dev(ndev);
255 pr_info("vlan dev %s -> %s.\n", vdev->name, ndev->name);
259 list_for_each_entry_rcu(cdev, &cdev_rcu_list, rcu_node) {
260 for (i = 0; i < cdev->nports; i++) {
261 if (ndev == cdev->ports[i]) {
262 cdev->hbas[i]->vdev = vdev;
272 log_debug(1 << CXGBI_DBG_DEV,
273 "ndev 0x%p, %s, NO match found.\n", ndev, ndev->name);
276 EXPORT_SYMBOL_GPL(cxgbi_device_find_by_netdev_rcu);
278 #if IS_ENABLED(CONFIG_IPV6)
279 static struct cxgbi_device *cxgbi_device_find_by_mac(struct net_device *ndev,
282 struct net_device *vdev = NULL;
283 struct cxgbi_device *cdev, *tmp;
286 if (ndev->priv_flags & IFF_802_1Q_VLAN) {
288 ndev = vlan_dev_real_dev(ndev);
289 pr_info("vlan dev %s -> %s.\n", vdev->name, ndev->name);
292 mutex_lock(&cdev_mutex);
293 list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
294 for (i = 0; i < cdev->nports; i++) {
295 if (!memcmp(ndev->dev_addr, cdev->ports[i]->dev_addr,
297 cdev->hbas[i]->vdev = vdev;
298 mutex_unlock(&cdev_mutex);
305 mutex_unlock(&cdev_mutex);
306 log_debug(1 << CXGBI_DBG_DEV,
307 "ndev 0x%p, %s, NO match mac found.\n",
313 void cxgbi_hbas_remove(struct cxgbi_device *cdev)
316 struct cxgbi_hba *chba;
318 log_debug(1 << CXGBI_DBG_DEV,
319 "cdev 0x%p, p#%u.\n", cdev, cdev->nports);
321 for (i = 0; i < cdev->nports; i++) {
322 chba = cdev->hbas[i];
324 cdev->hbas[i] = NULL;
325 iscsi_host_remove(chba->shost);
326 pci_dev_put(cdev->pdev);
327 iscsi_host_free(chba->shost);
331 EXPORT_SYMBOL_GPL(cxgbi_hbas_remove);
333 int cxgbi_hbas_add(struct cxgbi_device *cdev, u64 max_lun,
334 unsigned int max_id, struct scsi_host_template *sht,
335 struct scsi_transport_template *stt)
337 struct cxgbi_hba *chba;
338 struct Scsi_Host *shost;
341 log_debug(1 << CXGBI_DBG_DEV, "cdev 0x%p, p#%u.\n", cdev, cdev->nports);
343 for (i = 0; i < cdev->nports; i++) {
344 shost = iscsi_host_alloc(sht, sizeof(*chba), 1);
346 pr_info("0x%p, p%d, %s, host alloc failed.\n",
347 cdev, i, cdev->ports[i]->name);
352 shost->transportt = stt;
353 shost->max_lun = max_lun;
354 shost->max_id = max_id;
355 shost->max_channel = 0;
356 shost->max_cmd_len = 16;
358 chba = iscsi_host_priv(shost);
360 chba->ndev = cdev->ports[i];
363 log_debug(1 << CXGBI_DBG_DEV,
364 "cdev 0x%p, p#%d %s: chba 0x%p.\n",
365 cdev, i, cdev->ports[i]->name, chba);
367 pci_dev_get(cdev->pdev);
368 err = iscsi_host_add(shost, &cdev->pdev->dev);
370 pr_info("cdev 0x%p, p#%d %s, host add failed.\n",
371 cdev, i, cdev->ports[i]->name);
372 pci_dev_put(cdev->pdev);
373 scsi_host_put(shost);
377 cdev->hbas[i] = chba;
383 cxgbi_hbas_remove(cdev);
386 EXPORT_SYMBOL_GPL(cxgbi_hbas_add);
391 * - source port management
392 * To find a free source port in the port allocation map we use a very simple
393 * rotor scheme to look for the next free port.
395 * If a source port has been specified make sure that it doesn't collide with
396 * our normal source port allocation map. If it's outside the range of our
397 * allocation/deallocation scheme just let them use it.
399 * If the source port is outside our allocation range, the caller is
400 * responsible for keeping track of their port usage.
402 static int sock_get_port(struct cxgbi_sock *csk)
404 struct cxgbi_device *cdev = csk->cdev;
405 struct cxgbi_ports_map *pmap = &cdev->pmap;
410 if (!pmap->max_connect) {
411 pr_err("cdev 0x%p, p#%u %s, NO port map.\n",
412 cdev, csk->port_id, cdev->ports[csk->port_id]->name);
413 return -EADDRNOTAVAIL;
416 if (csk->csk_family == AF_INET)
417 port = &csk->saddr.sin_port;
419 port = &csk->saddr6.sin6_port;
422 pr_err("source port NON-ZERO %u.\n",
427 spin_lock_bh(&pmap->lock);
428 if (pmap->used >= pmap->max_connect) {
429 spin_unlock_bh(&pmap->lock);
430 pr_info("cdev 0x%p, p#%u %s, ALL ports used.\n",
431 cdev, csk->port_id, cdev->ports[csk->port_id]->name);
432 return -EADDRNOTAVAIL;
435 start = idx = pmap->next;
437 if (++idx >= pmap->max_connect)
439 if (!pmap->port_csk[idx]) {
441 *port = htons(pmap->sport_base + idx);
443 pmap->port_csk[idx] = csk;
444 spin_unlock_bh(&pmap->lock);
446 log_debug(1 << CXGBI_DBG_SOCK,
447 "cdev 0x%p, p#%u %s, p %u, %u.\n",
449 cdev->ports[csk->port_id]->name,
450 pmap->sport_base + idx, pmap->next);
453 } while (idx != start);
454 spin_unlock_bh(&pmap->lock);
456 /* should not happen */
457 pr_warn("cdev 0x%p, p#%u %s, next %u?\n",
458 cdev, csk->port_id, cdev->ports[csk->port_id]->name,
460 return -EADDRNOTAVAIL;
463 static void sock_put_port(struct cxgbi_sock *csk)
465 struct cxgbi_device *cdev = csk->cdev;
466 struct cxgbi_ports_map *pmap = &cdev->pmap;
469 if (csk->csk_family == AF_INET)
470 port = &csk->saddr.sin_port;
472 port = &csk->saddr6.sin6_port;
475 int idx = ntohs(*port) - pmap->sport_base;
478 if (idx < 0 || idx >= pmap->max_connect) {
479 pr_err("cdev 0x%p, p#%u %s, port %u OOR.\n",
481 cdev->ports[csk->port_id]->name,
486 spin_lock_bh(&pmap->lock);
487 pmap->port_csk[idx] = NULL;
489 spin_unlock_bh(&pmap->lock);
491 log_debug(1 << CXGBI_DBG_SOCK,
492 "cdev 0x%p, p#%u %s, release %u.\n",
493 cdev, csk->port_id, cdev->ports[csk->port_id]->name,
494 pmap->sport_base + idx);
501 * iscsi tcp connection
503 void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *csk)
505 if (csk->cpl_close) {
506 kfree_skb(csk->cpl_close);
507 csk->cpl_close = NULL;
509 if (csk->cpl_abort_req) {
510 kfree_skb(csk->cpl_abort_req);
511 csk->cpl_abort_req = NULL;
513 if (csk->cpl_abort_rpl) {
514 kfree_skb(csk->cpl_abort_rpl);
515 csk->cpl_abort_rpl = NULL;
518 EXPORT_SYMBOL_GPL(cxgbi_sock_free_cpl_skbs);
520 static struct cxgbi_sock *cxgbi_sock_create(struct cxgbi_device *cdev)
522 struct cxgbi_sock *csk = kzalloc(sizeof(*csk), GFP_NOIO);
525 pr_info("alloc csk %zu failed.\n", sizeof(*csk));
529 if (cdev->csk_alloc_cpls(csk) < 0) {
530 pr_info("csk 0x%p, alloc cpls failed.\n", csk);
535 spin_lock_init(&csk->lock);
536 kref_init(&csk->refcnt);
537 skb_queue_head_init(&csk->receive_queue);
538 skb_queue_head_init(&csk->write_queue);
539 setup_timer(&csk->retry_timer, NULL, (unsigned long)csk);
540 rwlock_init(&csk->callback_lock);
543 cxgbi_sock_set_state(csk, CTP_CLOSED);
545 log_debug(1 << CXGBI_DBG_SOCK, "cdev 0x%p, new csk 0x%p.\n", cdev, csk);
550 static struct rtable *find_route_ipv4(struct flowi4 *fl4,
551 __be32 saddr, __be32 daddr,
552 __be16 sport, __be16 dport, u8 tos)
556 rt = ip_route_output_ports(&init_net, fl4, NULL, daddr, saddr,
557 dport, sport, IPPROTO_TCP, tos, 0);
564 static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr)
566 struct sockaddr_in *daddr = (struct sockaddr_in *)dst_addr;
567 struct dst_entry *dst;
568 struct net_device *ndev;
569 struct cxgbi_device *cdev;
570 struct rtable *rt = NULL;
573 struct cxgbi_sock *csk = NULL;
574 unsigned int mtu = 0;
578 rt = find_route_ipv4(&fl4, 0, daddr->sin_addr.s_addr, 0, daddr->sin_port, 0);
580 pr_info("no route to ipv4 0x%x, port %u.\n",
581 be32_to_cpu(daddr->sin_addr.s_addr),
582 be16_to_cpu(daddr->sin_port));
587 n = dst_neigh_lookup(dst, &daddr->sin_addr.s_addr);
594 if (rt->rt_flags & (RTCF_MULTICAST | RTCF_BROADCAST)) {
595 pr_info("multi-cast route %pI4, port %u, dev %s.\n",
596 &daddr->sin_addr.s_addr, ntohs(daddr->sin_port),
602 if (ndev->flags & IFF_LOOPBACK) {
603 ndev = ip_dev_find(&init_net, daddr->sin_addr.s_addr);
605 pr_info("rt dev %s, loopback -> %s, mtu %u.\n",
606 n->dev->name, ndev->name, mtu);
609 cdev = cxgbi_device_find_by_netdev(ndev, &port);
611 pr_info("dst %pI4, %s, NOT cxgbi device.\n",
612 &daddr->sin_addr.s_addr, ndev->name);
616 log_debug(1 << CXGBI_DBG_SOCK,
617 "route to %pI4 :%u, ndev p#%d,%s, cdev 0x%p.\n",
618 &daddr->sin_addr.s_addr, ntohs(daddr->sin_port),
619 port, ndev->name, cdev);
621 csk = cxgbi_sock_create(cdev);
631 csk->csk_family = AF_INET;
632 csk->daddr.sin_addr.s_addr = daddr->sin_addr.s_addr;
633 csk->daddr.sin_port = daddr->sin_port;
634 csk->daddr.sin_family = daddr->sin_family;
635 csk->saddr.sin_family = daddr->sin_family;
636 csk->saddr.sin_addr.s_addr = fl4.saddr;
647 cxgbi_sock_closed(csk);
652 #if IS_ENABLED(CONFIG_IPV6)
653 static struct rt6_info *find_route_ipv6(const struct in6_addr *saddr,
654 const struct in6_addr *daddr)
659 memcpy(&fl.saddr, saddr, sizeof(struct in6_addr));
661 memcpy(&fl.daddr, daddr, sizeof(struct in6_addr));
662 return (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl);
665 static struct cxgbi_sock *cxgbi_check_route6(struct sockaddr *dst_addr)
667 struct sockaddr_in6 *daddr6 = (struct sockaddr_in6 *)dst_addr;
668 struct dst_entry *dst;
669 struct net_device *ndev;
670 struct cxgbi_device *cdev;
671 struct rt6_info *rt = NULL;
673 struct in6_addr pref_saddr;
674 struct cxgbi_sock *csk = NULL;
675 unsigned int mtu = 0;
679 rt = find_route_ipv6(NULL, &daddr6->sin6_addr);
682 pr_info("no route to ipv6 %pI6 port %u\n",
683 daddr6->sin6_addr.s6_addr,
684 be16_to_cpu(daddr6->sin6_port));
691 n = dst_neigh_lookup(dst, &daddr6->sin6_addr);
694 pr_info("%pI6, port %u, dst no neighbour.\n",
695 daddr6->sin6_addr.s6_addr,
696 be16_to_cpu(daddr6->sin6_port));
702 if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) {
703 pr_info("multi-cast route %pI6 port %u, dev %s.\n",
704 daddr6->sin6_addr.s6_addr,
705 ntohs(daddr6->sin6_port), ndev->name);
710 cdev = cxgbi_device_find_by_netdev(ndev, &port);
712 cdev = cxgbi_device_find_by_mac(ndev, &port);
714 pr_info("dst %pI6 %s, NOT cxgbi device.\n",
715 daddr6->sin6_addr.s6_addr, ndev->name);
719 log_debug(1 << CXGBI_DBG_SOCK,
720 "route to %pI6 :%u, ndev p#%d,%s, cdev 0x%p.\n",
721 daddr6->sin6_addr.s6_addr, ntohs(daddr6->sin6_port), port,
724 csk = cxgbi_sock_create(cdev);
734 if (ipv6_addr_any(&rt->rt6i_prefsrc.addr)) {
735 struct inet6_dev *idev = ip6_dst_idev((struct dst_entry *)rt);
737 err = ipv6_dev_get_saddr(&init_net, idev ? idev->dev : NULL,
738 &daddr6->sin6_addr, 0, &pref_saddr);
740 pr_info("failed to get source address to reach %pI6\n",
745 pref_saddr = rt->rt6i_prefsrc.addr;
748 csk->csk_family = AF_INET6;
749 csk->daddr6.sin6_addr = daddr6->sin6_addr;
750 csk->daddr6.sin6_port = daddr6->sin6_port;
751 csk->daddr6.sin6_family = daddr6->sin6_family;
752 csk->saddr6.sin6_addr = pref_saddr;
763 cxgbi_sock_closed(csk);
767 #endif /* IS_ENABLED(CONFIG_IPV6) */
769 void cxgbi_sock_established(struct cxgbi_sock *csk, unsigned int snd_isn,
772 csk->write_seq = csk->snd_nxt = csk->snd_una = snd_isn;
773 dst_confirm(csk->dst);
775 cxgbi_sock_set_state(csk, CTP_ESTABLISHED);
777 EXPORT_SYMBOL_GPL(cxgbi_sock_established);
779 static void cxgbi_inform_iscsi_conn_closing(struct cxgbi_sock *csk)
781 log_debug(1 << CXGBI_DBG_SOCK,
782 "csk 0x%p, state %u, flags 0x%lx, conn 0x%p.\n",
783 csk, csk->state, csk->flags, csk->user_data);
785 if (csk->state != CTP_ESTABLISHED) {
786 read_lock_bh(&csk->callback_lock);
788 iscsi_conn_failure(csk->user_data,
789 ISCSI_ERR_CONN_FAILED);
790 read_unlock_bh(&csk->callback_lock);
794 void cxgbi_sock_closed(struct cxgbi_sock *csk)
796 log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
797 csk, (csk)->state, (csk)->flags, (csk)->tid);
798 cxgbi_sock_set_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED);
799 if (csk->state == CTP_ACTIVE_OPEN || csk->state == CTP_CLOSED)
801 if (csk->saddr.sin_port)
804 dst_release(csk->dst);
805 csk->cdev->csk_release_offload_resources(csk);
806 cxgbi_sock_set_state(csk, CTP_CLOSED);
807 cxgbi_inform_iscsi_conn_closing(csk);
810 EXPORT_SYMBOL_GPL(cxgbi_sock_closed);
812 static void need_active_close(struct cxgbi_sock *csk)
817 log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
818 csk, (csk)->state, (csk)->flags, (csk)->tid);
819 spin_lock_bh(&csk->lock);
820 dst_confirm(csk->dst);
821 data_lost = skb_queue_len(&csk->receive_queue);
822 __skb_queue_purge(&csk->receive_queue);
824 if (csk->state == CTP_ACTIVE_OPEN)
825 cxgbi_sock_set_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED);
826 else if (csk->state == CTP_ESTABLISHED) {
828 cxgbi_sock_set_state(csk, CTP_ACTIVE_CLOSE);
829 } else if (csk->state == CTP_PASSIVE_CLOSE) {
831 cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_2);
836 csk->cdev->csk_send_abort_req(csk);
838 csk->cdev->csk_send_close_req(csk);
841 spin_unlock_bh(&csk->lock);
844 void cxgbi_sock_fail_act_open(struct cxgbi_sock *csk, int errno)
846 pr_info("csk 0x%p,%u,%lx, %pI4:%u-%pI4:%u, err %d.\n",
847 csk, csk->state, csk->flags,
848 &csk->saddr.sin_addr.s_addr, csk->saddr.sin_port,
849 &csk->daddr.sin_addr.s_addr, csk->daddr.sin_port,
852 cxgbi_sock_set_state(csk, CTP_CONNECTING);
854 cxgbi_sock_closed(csk);
856 EXPORT_SYMBOL_GPL(cxgbi_sock_fail_act_open);
858 void cxgbi_sock_act_open_req_arp_failure(void *handle, struct sk_buff *skb)
860 struct cxgbi_sock *csk = (struct cxgbi_sock *)skb->sk;
862 log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
863 csk, (csk)->state, (csk)->flags, (csk)->tid);
865 spin_lock_bh(&csk->lock);
866 if (csk->state == CTP_ACTIVE_OPEN)
867 cxgbi_sock_fail_act_open(csk, -EHOSTUNREACH);
868 spin_unlock_bh(&csk->lock);
872 EXPORT_SYMBOL_GPL(cxgbi_sock_act_open_req_arp_failure);
874 void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *csk)
877 spin_lock_bh(&csk->lock);
878 if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
879 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_RCVD))
880 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_RCVD);
882 cxgbi_sock_clear_flag(csk, CTPF_ABORT_RPL_RCVD);
883 cxgbi_sock_clear_flag(csk, CTPF_ABORT_RPL_PENDING);
884 if (cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD))
885 pr_err("csk 0x%p,%u,0x%lx,%u,ABT_RPL_RSS.\n",
886 csk, csk->state, csk->flags, csk->tid);
887 cxgbi_sock_closed(csk);
890 spin_unlock_bh(&csk->lock);
893 EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_abort_rpl);
895 void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *csk)
897 log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
898 csk, (csk)->state, (csk)->flags, (csk)->tid);
900 spin_lock_bh(&csk->lock);
902 if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING))
905 switch (csk->state) {
906 case CTP_ESTABLISHED:
907 cxgbi_sock_set_state(csk, CTP_PASSIVE_CLOSE);
909 case CTP_ACTIVE_CLOSE:
910 cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_2);
912 case CTP_CLOSE_WAIT_1:
913 cxgbi_sock_closed(csk);
918 pr_err("csk 0x%p,%u,0x%lx,%u, bad state.\n",
919 csk, csk->state, csk->flags, csk->tid);
921 cxgbi_inform_iscsi_conn_closing(csk);
923 spin_unlock_bh(&csk->lock);
926 EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_peer_close);
928 void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *csk, u32 snd_nxt)
930 log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
931 csk, (csk)->state, (csk)->flags, (csk)->tid);
933 spin_lock_bh(&csk->lock);
935 csk->snd_una = snd_nxt - 1;
936 if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING))
939 switch (csk->state) {
940 case CTP_ACTIVE_CLOSE:
941 cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_1);
943 case CTP_CLOSE_WAIT_1:
944 case CTP_CLOSE_WAIT_2:
945 cxgbi_sock_closed(csk);
950 pr_err("csk 0x%p,%u,0x%lx,%u, bad state.\n",
951 csk, csk->state, csk->flags, csk->tid);
954 spin_unlock_bh(&csk->lock);
957 EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_close_conn_rpl);
959 void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *csk, unsigned int credits,
960 unsigned int snd_una, int seq_chk)
962 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
963 "csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, snd_una %u,%d.\n",
964 csk, csk->state, csk->flags, csk->tid, credits,
965 csk->wr_cred, csk->wr_una_cred, snd_una, seq_chk);
967 spin_lock_bh(&csk->lock);
969 csk->wr_cred += credits;
970 if (csk->wr_una_cred > csk->wr_max_cred - csk->wr_cred)
971 csk->wr_una_cred = csk->wr_max_cred - csk->wr_cred;
974 struct sk_buff *p = cxgbi_sock_peek_wr(csk);
977 pr_err("csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, empty.\n",
978 csk, csk->state, csk->flags, csk->tid, credits,
979 csk->wr_cred, csk->wr_una_cred);
983 if (unlikely(credits < p->csum)) {
984 pr_warn("csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, < %u.\n",
985 csk, csk->state, csk->flags, csk->tid,
986 credits, csk->wr_cred, csk->wr_una_cred,
991 cxgbi_sock_dequeue_wr(csk);
997 cxgbi_sock_check_wr_invariants(csk);
1000 if (unlikely(before(snd_una, csk->snd_una))) {
1001 pr_warn("csk 0x%p,%u,0x%lx,%u, snd_una %u/%u.",
1002 csk, csk->state, csk->flags, csk->tid, snd_una,
1007 if (csk->snd_una != snd_una) {
1008 csk->snd_una = snd_una;
1009 dst_confirm(csk->dst);
1013 if (skb_queue_len(&csk->write_queue)) {
1014 if (csk->cdev->csk_push_tx_frames(csk, 0))
1015 cxgbi_conn_tx_open(csk);
1017 cxgbi_conn_tx_open(csk);
1019 spin_unlock_bh(&csk->lock);
1021 EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_wr_ack);
1023 static unsigned int cxgbi_sock_find_best_mtu(struct cxgbi_sock *csk,
1028 while (i < csk->cdev->nmtus - 1 && csk->cdev->mtus[i + 1] <= mtu)
1034 unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *csk, unsigned int pmtu)
1037 struct dst_entry *dst = csk->dst;
1039 csk->advmss = dst_metric_advmss(dst);
1041 if (csk->advmss > pmtu - 40)
1042 csk->advmss = pmtu - 40;
1043 if (csk->advmss < csk->cdev->mtus[0] - 40)
1044 csk->advmss = csk->cdev->mtus[0] - 40;
1045 idx = cxgbi_sock_find_best_mtu(csk, csk->advmss + 40);
1049 EXPORT_SYMBOL_GPL(cxgbi_sock_select_mss);
1051 void cxgbi_sock_skb_entail(struct cxgbi_sock *csk, struct sk_buff *skb)
1053 cxgbi_skcb_tcp_seq(skb) = csk->write_seq;
1054 __skb_queue_tail(&csk->write_queue, skb);
1056 EXPORT_SYMBOL_GPL(cxgbi_sock_skb_entail);
1058 void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *csk)
1060 struct sk_buff *skb;
1062 while ((skb = cxgbi_sock_dequeue_wr(csk)) != NULL)
1065 EXPORT_SYMBOL_GPL(cxgbi_sock_purge_wr_queue);
1067 void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *csk)
1069 int pending = cxgbi_sock_count_pending_wrs(csk);
1071 if (unlikely(csk->wr_cred + pending != csk->wr_max_cred))
1072 pr_err("csk 0x%p, tid %u, credit %u + %u != %u.\n",
1073 csk, csk->tid, csk->wr_cred, pending, csk->wr_max_cred);
1075 EXPORT_SYMBOL_GPL(cxgbi_sock_check_wr_invariants);
1077 static int cxgbi_sock_send_pdus(struct cxgbi_sock *csk, struct sk_buff *skb)
1079 struct cxgbi_device *cdev = csk->cdev;
1080 struct sk_buff *next;
1081 int err, copied = 0;
1083 spin_lock_bh(&csk->lock);
1085 if (csk->state != CTP_ESTABLISHED) {
1086 log_debug(1 << CXGBI_DBG_PDU_TX,
1087 "csk 0x%p,%u,0x%lx,%u, EAGAIN.\n",
1088 csk, csk->state, csk->flags, csk->tid);
1094 log_debug(1 << CXGBI_DBG_PDU_TX,
1095 "csk 0x%p,%u,0x%lx,%u, EPIPE %d.\n",
1096 csk, csk->state, csk->flags, csk->tid, csk->err);
1101 if (csk->write_seq - csk->snd_una >= cdev->snd_win) {
1102 log_debug(1 << CXGBI_DBG_PDU_TX,
1103 "csk 0x%p,%u,0x%lx,%u, FULL %u-%u >= %u.\n",
1104 csk, csk->state, csk->flags, csk->tid, csk->write_seq,
1105 csk->snd_una, cdev->snd_win);
1111 int frags = skb_shinfo(skb)->nr_frags +
1112 (skb->len != skb->data_len);
1114 if (unlikely(skb_headroom(skb) < cdev->skb_tx_rsvd)) {
1115 pr_err("csk 0x%p, skb head %u < %u.\n",
1116 csk, skb_headroom(skb), cdev->skb_tx_rsvd);
1121 if (frags >= SKB_WR_LIST_SIZE) {
1122 pr_err("csk 0x%p, frags %d, %u,%u >%u.\n",
1123 csk, skb_shinfo(skb)->nr_frags, skb->len,
1124 skb->data_len, (uint)(SKB_WR_LIST_SIZE));
1131 cxgbi_skcb_set_flag(skb, SKCBF_TX_NEED_HDR);
1132 cxgbi_sock_skb_entail(csk, skb);
1134 csk->write_seq += skb->len +
1135 cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
1139 if (likely(skb_queue_len(&csk->write_queue)))
1140 cdev->csk_push_tx_frames(csk, 1);
1141 spin_unlock_bh(&csk->lock);
1145 if (copied == 0 && err == -EPIPE)
1146 copied = csk->err ? csk->err : -EPIPE;
1153 * Direct Data Placement -
1154 * Directly place the iSCSI Data-In or Data-Out PDU's payload into pre-posted
1155 * final destination host-memory buffers based on the Initiator Task Tag (ITT)
1156 * in Data-In or Target Task Tag (TTT) in Data-Out PDUs.
1157 * The host memory address is programmed into h/w in the format of pagepod
1159 * The location of the pagepod entry is encoded into ddp tag which is used as
1160 * the base for ITT/TTT.
1163 static unsigned char ddp_page_order[DDP_PGIDX_MAX] = {0, 1, 2, 4};
1164 static unsigned char ddp_page_shift[DDP_PGIDX_MAX] = {12, 13, 14, 16};
1165 static unsigned char page_idx = DDP_PGIDX_MAX;
1167 static unsigned char sw_tag_idx_bits;
1168 static unsigned char sw_tag_age_bits;
1171 * Direct-Data Placement page size adjustment
1173 static int ddp_adjust_page_table(void)
1176 unsigned int base_order, order;
1178 if (PAGE_SIZE < (1UL << ddp_page_shift[0])) {
1179 pr_info("PAGE_SIZE 0x%lx too small, min 0x%lx\n",
1180 PAGE_SIZE, 1UL << ddp_page_shift[0]);
1184 base_order = get_order(1UL << ddp_page_shift[0]);
1185 order = get_order(1UL << PAGE_SHIFT);
1187 for (i = 0; i < DDP_PGIDX_MAX; i++) {
1188 /* first is the kernel page size, then just doubling */
1189 ddp_page_order[i] = order - base_order + i;
1190 ddp_page_shift[i] = PAGE_SHIFT + i;
1195 static int ddp_find_page_index(unsigned long pgsz)
1199 for (i = 0; i < DDP_PGIDX_MAX; i++) {
1200 if (pgsz == (1UL << ddp_page_shift[i]))
1203 pr_info("ddp page size %lu not supported.\n", pgsz);
1204 return DDP_PGIDX_MAX;
1207 static void ddp_setup_host_page_size(void)
1209 if (page_idx == DDP_PGIDX_MAX) {
1210 page_idx = ddp_find_page_index(PAGE_SIZE);
1212 if (page_idx == DDP_PGIDX_MAX) {
1213 pr_info("system PAGE %lu, update hw.\n", PAGE_SIZE);
1214 if (ddp_adjust_page_table() < 0) {
1215 pr_info("PAGE %lu, disable ddp.\n", PAGE_SIZE);
1218 page_idx = ddp_find_page_index(PAGE_SIZE);
1220 pr_info("system PAGE %lu, ddp idx %u.\n", PAGE_SIZE, page_idx);
1224 void cxgbi_ddp_page_size_factor(int *pgsz_factor)
1228 for (i = 0; i < DDP_PGIDX_MAX; i++)
1229 pgsz_factor[i] = ddp_page_order[i];
1231 EXPORT_SYMBOL_GPL(cxgbi_ddp_page_size_factor);
1234 * DDP setup & teardown
1237 void cxgbi_ddp_ppod_set(struct cxgbi_pagepod *ppod,
1238 struct cxgbi_pagepod_hdr *hdr,
1239 struct cxgbi_gather_list *gl, unsigned int gidx)
1243 memcpy(ppod, hdr, sizeof(*hdr));
1244 for (i = 0; i < (PPOD_PAGES_MAX + 1); i++, gidx++) {
1245 ppod->addr[i] = gidx < gl->nelem ?
1246 cpu_to_be64(gl->phys_addr[gidx]) : 0ULL;
1249 EXPORT_SYMBOL_GPL(cxgbi_ddp_ppod_set);
1251 void cxgbi_ddp_ppod_clear(struct cxgbi_pagepod *ppod)
1253 memset(ppod, 0, sizeof(*ppod));
1255 EXPORT_SYMBOL_GPL(cxgbi_ddp_ppod_clear);
1257 static inline int ddp_find_unused_entries(struct cxgbi_ddp_info *ddp,
1258 unsigned int start, unsigned int max,
1260 struct cxgbi_gather_list *gl)
1262 unsigned int i, j, k;
1264 /* not enough entries */
1265 if ((max - start) < count) {
1266 log_debug(1 << CXGBI_DBG_DDP,
1267 "NOT enough entries %u+%u < %u.\n", start, count, max);
1272 spin_lock(&ddp->map_lock);
1273 for (i = start; i < max;) {
1274 for (j = 0, k = i; j < count; j++, k++) {
1279 for (j = 0, k = i; j < count; j++, k++)
1280 ddp->gl_map[k] = gl;
1281 spin_unlock(&ddp->map_lock);
1286 spin_unlock(&ddp->map_lock);
1287 log_debug(1 << CXGBI_DBG_DDP,
1288 "NO suitable entries %u available.\n", count);
1292 static inline void ddp_unmark_entries(struct cxgbi_ddp_info *ddp,
1293 int start, int count)
1295 spin_lock(&ddp->map_lock);
1296 memset(&ddp->gl_map[start], 0,
1297 count * sizeof(struct cxgbi_gather_list *));
1298 spin_unlock(&ddp->map_lock);
1301 static inline void ddp_gl_unmap(struct pci_dev *pdev,
1302 struct cxgbi_gather_list *gl)
1306 for (i = 0; i < gl->nelem; i++)
1307 dma_unmap_page(&pdev->dev, gl->phys_addr[i], PAGE_SIZE,
1308 PCI_DMA_FROMDEVICE);
1311 static inline int ddp_gl_map(struct pci_dev *pdev,
1312 struct cxgbi_gather_list *gl)
1316 for (i = 0; i < gl->nelem; i++) {
1317 gl->phys_addr[i] = dma_map_page(&pdev->dev, gl->pages[i], 0,
1319 PCI_DMA_FROMDEVICE);
1320 if (unlikely(dma_mapping_error(&pdev->dev, gl->phys_addr[i]))) {
1321 log_debug(1 << CXGBI_DBG_DDP,
1322 "page %d 0x%p, 0x%p dma mapping err.\n",
1323 i, gl->pages[i], pdev);
1330 unsigned int nelem = gl->nelem;
1333 ddp_gl_unmap(pdev, gl);
1339 static void ddp_release_gl(struct cxgbi_gather_list *gl,
1340 struct pci_dev *pdev)
1342 ddp_gl_unmap(pdev, gl);
1346 static struct cxgbi_gather_list *ddp_make_gl(unsigned int xferlen,
1347 struct scatterlist *sgl,
1349 struct pci_dev *pdev,
1352 struct cxgbi_gather_list *gl;
1353 struct scatterlist *sg = sgl;
1354 struct page *sgpage = sg_page(sg);
1355 unsigned int sglen = sg->length;
1356 unsigned int sgoffset = sg->offset;
1357 unsigned int npages = (xferlen + sgoffset + PAGE_SIZE - 1) >>
1361 if (xferlen < DDP_THRESHOLD) {
1362 log_debug(1 << CXGBI_DBG_DDP,
1363 "xfer %u < threshold %u, no ddp.\n",
1364 xferlen, DDP_THRESHOLD);
1368 gl = kzalloc(sizeof(struct cxgbi_gather_list) +
1369 npages * (sizeof(dma_addr_t) +
1370 sizeof(struct page *)), gfp);
1372 log_debug(1 << CXGBI_DBG_DDP,
1373 "xfer %u, %u pages, OOM.\n", xferlen, npages);
1377 log_debug(1 << CXGBI_DBG_DDP,
1378 "xfer %u, sgl %u, gl max %u.\n", xferlen, sgcnt, npages);
1380 gl->pages = (struct page **)&gl->phys_addr[npages];
1382 gl->length = xferlen;
1383 gl->offset = sgoffset;
1384 gl->pages[0] = sgpage;
1386 for (i = 1, sg = sg_next(sgl), j = 0; i < sgcnt;
1387 i++, sg = sg_next(sg)) {
1388 struct page *page = sg_page(sg);
1390 if (sgpage == page && sg->offset == sgoffset + sglen)
1391 sglen += sg->length;
1393 /* make sure the sgl is fit for ddp:
1394 * each has the same page size, and
1395 * all of the middle pages are used completely
1397 if ((j && sgoffset) || ((i != sgcnt - 1) &&
1398 ((sglen + sgoffset) & ~PAGE_MASK))) {
1399 log_debug(1 << CXGBI_DBG_DDP,
1400 "page %d/%u, %u + %u.\n",
1401 i, sgcnt, sgoffset, sglen);
1406 if (j == gl->nelem || sg->offset) {
1407 log_debug(1 << CXGBI_DBG_DDP,
1408 "page %d/%u, offset %u.\n",
1409 j, gl->nelem, sg->offset);
1412 gl->pages[j] = page;
1414 sgoffset = sg->offset;
1420 if (ddp_gl_map(pdev, gl) < 0)
1430 static void ddp_tag_release(struct cxgbi_hba *chba, u32 tag)
1432 struct cxgbi_device *cdev = chba->cdev;
1433 struct cxgbi_ddp_info *ddp = cdev->ddp;
1436 idx = (tag >> PPOD_IDX_SHIFT) & ddp->idx_mask;
1437 if (idx < ddp->nppods) {
1438 struct cxgbi_gather_list *gl = ddp->gl_map[idx];
1441 if (!gl || !gl->nelem) {
1442 pr_warn("tag 0x%x, idx %u, gl 0x%p, %u.\n",
1443 tag, idx, gl, gl ? gl->nelem : 0);
1446 npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT;
1447 log_debug(1 << CXGBI_DBG_DDP,
1448 "tag 0x%x, release idx %u, npods %u.\n",
1450 cdev->csk_ddp_clear(chba, tag, idx, npods);
1451 ddp_unmark_entries(ddp, idx, npods);
1452 ddp_release_gl(gl, ddp->pdev);
1454 pr_warn("tag 0x%x, idx %u > max %u.\n", tag, idx, ddp->nppods);
1457 static int ddp_tag_reserve(struct cxgbi_sock *csk, unsigned int tid,
1458 u32 sw_tag, u32 *tagp, struct cxgbi_gather_list *gl,
1461 struct cxgbi_device *cdev = csk->cdev;
1462 struct cxgbi_ddp_info *ddp = cdev->ddp;
1463 struct cxgbi_tag_format *tformat = &cdev->tag_format;
1464 struct cxgbi_pagepod_hdr hdr;
1470 npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT;
1471 if (ddp->idx_last == ddp->nppods)
1472 idx = ddp_find_unused_entries(ddp, 0, ddp->nppods,
1475 idx = ddp_find_unused_entries(ddp, ddp->idx_last + 1,
1478 if (idx < 0 && ddp->idx_last >= npods) {
1479 idx = ddp_find_unused_entries(ddp, 0,
1480 min(ddp->idx_last + npods, ddp->nppods),
1485 log_debug(1 << CXGBI_DBG_DDP,
1486 "xferlen %u, gl %u, npods %u NO DDP.\n",
1487 gl->length, gl->nelem, npods);
1491 tag = cxgbi_ddp_tag_base(tformat, sw_tag);
1492 tag |= idx << PPOD_IDX_SHIFT;
1495 hdr.vld_tid = htonl(PPOD_VALID_FLAG | PPOD_TID(tid));
1496 hdr.pgsz_tag_clr = htonl(tag & ddp->rsvd_tag_mask);
1497 hdr.max_offset = htonl(gl->length);
1498 hdr.page_offset = htonl(gl->offset);
1500 err = cdev->csk_ddp_set(csk, &hdr, idx, npods, gl);
1502 goto unmark_entries;
1504 ddp->idx_last = idx;
1505 log_debug(1 << CXGBI_DBG_DDP,
1506 "xfer %u, gl %u,%u, tid 0x%x, tag 0x%x->0x%x(%u,%u).\n",
1507 gl->length, gl->nelem, gl->offset, tid, sw_tag, tag, idx,
1513 ddp_unmark_entries(ddp, idx, npods);
1517 int cxgbi_ddp_reserve(struct cxgbi_sock *csk, unsigned int *tagp,
1518 unsigned int sw_tag, unsigned int xferlen,
1519 struct scatterlist *sgl, unsigned int sgcnt, gfp_t gfp)
1521 struct cxgbi_device *cdev = csk->cdev;
1522 struct cxgbi_tag_format *tformat = &cdev->tag_format;
1523 struct cxgbi_gather_list *gl;
1526 if (page_idx >= DDP_PGIDX_MAX || !cdev->ddp ||
1527 xferlen < DDP_THRESHOLD) {
1528 log_debug(1 << CXGBI_DBG_DDP,
1529 "pgidx %u, xfer %u, NO ddp.\n", page_idx, xferlen);
1533 if (!cxgbi_sw_tag_usable(tformat, sw_tag)) {
1534 log_debug(1 << CXGBI_DBG_DDP,
1535 "sw_tag 0x%x NOT usable.\n", sw_tag);
1539 gl = ddp_make_gl(xferlen, sgl, sgcnt, cdev->pdev, gfp);
1543 err = ddp_tag_reserve(csk, csk->tid, sw_tag, tagp, gl, gfp);
1545 ddp_release_gl(gl, cdev->pdev);
1550 static void ddp_destroy(struct kref *kref)
1552 struct cxgbi_ddp_info *ddp = container_of(kref,
1553 struct cxgbi_ddp_info,
1555 struct cxgbi_device *cdev = ddp->cdev;
1558 pr_info("kref 0, destroy ddp 0x%p, cdev 0x%p.\n", ddp, cdev);
1560 while (i < ddp->nppods) {
1561 struct cxgbi_gather_list *gl = ddp->gl_map[i];
1564 int npods = (gl->nelem + PPOD_PAGES_MAX - 1)
1565 >> PPOD_PAGES_SHIFT;
1566 pr_info("cdev 0x%p, ddp %d + %d.\n", cdev, i, npods);
1572 cxgbi_free_big_mem(ddp);
1575 int cxgbi_ddp_cleanup(struct cxgbi_device *cdev)
1577 struct cxgbi_ddp_info *ddp = cdev->ddp;
1579 log_debug(1 << CXGBI_DBG_DDP,
1580 "cdev 0x%p, release ddp 0x%p.\n", cdev, ddp);
1583 return kref_put(&ddp->refcnt, ddp_destroy);
1586 EXPORT_SYMBOL_GPL(cxgbi_ddp_cleanup);
1588 int cxgbi_ddp_init(struct cxgbi_device *cdev,
1589 unsigned int llimit, unsigned int ulimit,
1590 unsigned int max_txsz, unsigned int max_rxsz)
1592 struct cxgbi_ddp_info *ddp;
1593 unsigned int ppmax, bits;
1595 ppmax = (ulimit - llimit + 1) >> PPOD_SIZE_SHIFT;
1596 bits = __ilog2_u32(ppmax) + 1;
1597 if (bits > PPOD_IDX_MAX_SIZE)
1598 bits = PPOD_IDX_MAX_SIZE;
1599 ppmax = (1 << (bits - 1)) - 1;
1601 ddp = cxgbi_alloc_big_mem(sizeof(struct cxgbi_ddp_info) +
1602 ppmax * (sizeof(struct cxgbi_gather_list *) +
1603 sizeof(struct sk_buff *)),
1606 pr_warn("cdev 0x%p, ddp ppmax %u OOM.\n", cdev, ppmax);
1609 ddp->gl_map = (struct cxgbi_gather_list **)(ddp + 1);
1612 spin_lock_init(&ddp->map_lock);
1613 kref_init(&ddp->refcnt);
1616 ddp->pdev = cdev->pdev;
1617 ddp->llimit = llimit;
1618 ddp->ulimit = ulimit;
1619 ddp->max_txsz = min_t(unsigned int, max_txsz, ULP2_MAX_PKT_SIZE);
1620 ddp->max_rxsz = min_t(unsigned int, max_rxsz, ULP2_MAX_PKT_SIZE);
1621 ddp->nppods = ppmax;
1622 ddp->idx_last = ppmax;
1623 ddp->idx_bits = bits;
1624 ddp->idx_mask = (1 << bits) - 1;
1625 ddp->rsvd_tag_mask = (1 << (bits + PPOD_IDX_SHIFT)) - 1;
1627 cdev->tag_format.sw_bits = sw_tag_idx_bits + sw_tag_age_bits;
1628 cdev->tag_format.rsvd_bits = ddp->idx_bits;
1629 cdev->tag_format.rsvd_shift = PPOD_IDX_SHIFT;
1630 cdev->tag_format.rsvd_mask = (1 << cdev->tag_format.rsvd_bits) - 1;
1632 pr_info("%s tag format, sw %u, rsvd %u,%u, mask 0x%x.\n",
1633 cdev->ports[0]->name, cdev->tag_format.sw_bits,
1634 cdev->tag_format.rsvd_bits, cdev->tag_format.rsvd_shift,
1635 cdev->tag_format.rsvd_mask);
1637 cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
1638 ddp->max_txsz - ISCSI_PDU_NONPAYLOAD_LEN);
1639 cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
1640 ddp->max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN);
1642 log_debug(1 << CXGBI_DBG_DDP,
1643 "%s max payload size: %u/%u, %u/%u.\n",
1644 cdev->ports[0]->name, cdev->tx_max_size, ddp->max_txsz,
1645 cdev->rx_max_size, ddp->max_rxsz);
1648 EXPORT_SYMBOL_GPL(cxgbi_ddp_init);
1651 * APIs interacting with open-iscsi libraries
1654 static unsigned char padding[4];
1656 static void task_release_itt(struct iscsi_task *task, itt_t hdr_itt)
1658 struct scsi_cmnd *sc = task->sc;
1659 struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
1660 struct cxgbi_conn *cconn = tcp_conn->dd_data;
1661 struct cxgbi_hba *chba = cconn->chba;
1662 struct cxgbi_tag_format *tformat = &chba->cdev->tag_format;
1663 u32 tag = ntohl((__force u32)hdr_itt);
1665 log_debug(1 << CXGBI_DBG_DDP,
1666 "cdev 0x%p, release tag 0x%x.\n", chba->cdev, tag);
1668 (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE) &&
1669 cxgbi_is_ddp_tag(tformat, tag))
1670 ddp_tag_release(chba, tag);
1673 static int task_reserve_itt(struct iscsi_task *task, itt_t *hdr_itt)
1675 struct scsi_cmnd *sc = task->sc;
1676 struct iscsi_conn *conn = task->conn;
1677 struct iscsi_session *sess = conn->session;
1678 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
1679 struct cxgbi_conn *cconn = tcp_conn->dd_data;
1680 struct cxgbi_hba *chba = cconn->chba;
1681 struct cxgbi_tag_format *tformat = &chba->cdev->tag_format;
1682 u32 sw_tag = (sess->age << cconn->task_idx_bits) | task->itt;
1687 (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE)) {
1688 err = cxgbi_ddp_reserve(cconn->cep->csk, &tag, sw_tag,
1689 scsi_in(sc)->length,
1690 scsi_in(sc)->table.sgl,
1691 scsi_in(sc)->table.nents,
1694 log_debug(1 << CXGBI_DBG_DDP,
1695 "csk 0x%p, R task 0x%p, %u,%u, no ddp.\n",
1696 cconn->cep->csk, task, scsi_in(sc)->length,
1697 scsi_in(sc)->table.nents);
1701 tag = cxgbi_set_non_ddp_tag(tformat, sw_tag);
1702 /* the itt need to sent in big-endian order */
1703 *hdr_itt = (__force itt_t)htonl(tag);
1705 log_debug(1 << CXGBI_DBG_DDP,
1706 "cdev 0x%p, task 0x%p, 0x%x(0x%x,0x%x)->0x%x/0x%x.\n",
1707 chba->cdev, task, sw_tag, task->itt, sess->age, tag, *hdr_itt);
1711 void cxgbi_parse_pdu_itt(struct iscsi_conn *conn, itt_t itt, int *idx, int *age)
1713 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
1714 struct cxgbi_conn *cconn = tcp_conn->dd_data;
1715 struct cxgbi_device *cdev = cconn->chba->cdev;
1716 u32 tag = ntohl((__force u32) itt);
1719 sw_bits = cxgbi_tag_nonrsvd_bits(&cdev->tag_format, tag);
1721 *idx = sw_bits & ((1 << cconn->task_idx_bits) - 1);
1723 *age = (sw_bits >> cconn->task_idx_bits) & ISCSI_AGE_MASK;
1725 log_debug(1 << CXGBI_DBG_DDP,
1726 "cdev 0x%p, tag 0x%x/0x%x, -> 0x%x(0x%x,0x%x).\n",
1727 cdev, tag, itt, sw_bits, idx ? *idx : 0xFFFFF,
1730 EXPORT_SYMBOL_GPL(cxgbi_parse_pdu_itt);
1732 void cxgbi_conn_tx_open(struct cxgbi_sock *csk)
1734 struct iscsi_conn *conn = csk->user_data;
1737 log_debug(1 << CXGBI_DBG_SOCK,
1738 "csk 0x%p, cid %d.\n", csk, conn->id);
1739 iscsi_conn_queue_work(conn);
1742 EXPORT_SYMBOL_GPL(cxgbi_conn_tx_open);
1745 * pdu receive, interact with libiscsi_tcp
1747 static inline int read_pdu_skb(struct iscsi_conn *conn,
1748 struct sk_buff *skb,
1749 unsigned int offset,
1755 bytes_read = iscsi_tcp_recv_skb(conn, skb, offset, offloaded, &status);
1757 case ISCSI_TCP_CONN_ERR:
1758 pr_info("skb 0x%p, off %u, %d, TCP_ERR.\n",
1759 skb, offset, offloaded);
1761 case ISCSI_TCP_SUSPENDED:
1762 log_debug(1 << CXGBI_DBG_PDU_RX,
1763 "skb 0x%p, off %u, %d, TCP_SUSPEND, rc %d.\n",
1764 skb, offset, offloaded, bytes_read);
1765 /* no transfer - just have caller flush queue */
1767 case ISCSI_TCP_SKB_DONE:
1768 pr_info("skb 0x%p, off %u, %d, TCP_SKB_DONE.\n",
1769 skb, offset, offloaded);
1771 * pdus should always fit in the skb and we should get
1772 * segment done notifcation.
1774 iscsi_conn_printk(KERN_ERR, conn, "Invalid pdu or skb.");
1776 case ISCSI_TCP_SEGMENT_DONE:
1777 log_debug(1 << CXGBI_DBG_PDU_RX,
1778 "skb 0x%p, off %u, %d, TCP_SEG_DONE, rc %d.\n",
1779 skb, offset, offloaded, bytes_read);
1782 pr_info("skb 0x%p, off %u, %d, invalid status %d.\n",
1783 skb, offset, offloaded, status);
1788 static int skb_read_pdu_bhs(struct iscsi_conn *conn, struct sk_buff *skb)
1790 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
1792 log_debug(1 << CXGBI_DBG_PDU_RX,
1793 "conn 0x%p, skb 0x%p, len %u, flag 0x%lx.\n",
1794 conn, skb, skb->len, cxgbi_skcb_flags(skb));
1796 if (!iscsi_tcp_recv_segment_is_hdr(tcp_conn)) {
1797 pr_info("conn 0x%p, skb 0x%p, not hdr.\n", conn, skb);
1798 iscsi_conn_failure(conn, ISCSI_ERR_PROTO);
1802 if (conn->hdrdgst_en &&
1803 cxgbi_skcb_test_flag(skb, SKCBF_RX_HCRC_ERR)) {
1804 pr_info("conn 0x%p, skb 0x%p, hcrc.\n", conn, skb);
1805 iscsi_conn_failure(conn, ISCSI_ERR_HDR_DGST);
1809 return read_pdu_skb(conn, skb, 0, 0);
1812 static int skb_read_pdu_data(struct iscsi_conn *conn, struct sk_buff *lskb,
1813 struct sk_buff *skb, unsigned int offset)
1815 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
1817 int opcode = tcp_conn->in.hdr->opcode & ISCSI_OPCODE_MASK;
1819 log_debug(1 << CXGBI_DBG_PDU_RX,
1820 "conn 0x%p, skb 0x%p, len %u, flag 0x%lx.\n",
1821 conn, skb, skb->len, cxgbi_skcb_flags(skb));
1823 if (conn->datadgst_en &&
1824 cxgbi_skcb_test_flag(lskb, SKCBF_RX_DCRC_ERR)) {
1825 pr_info("conn 0x%p, skb 0x%p, dcrc 0x%lx.\n",
1826 conn, lskb, cxgbi_skcb_flags(lskb));
1827 iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
1831 if (iscsi_tcp_recv_segment_is_hdr(tcp_conn))
1834 /* coalesced, add header digest length */
1835 if (lskb == skb && conn->hdrdgst_en)
1836 offset += ISCSI_DIGEST_SIZE;
1838 if (cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA_DDPD))
1841 if (opcode == ISCSI_OP_SCSI_DATA_IN)
1842 log_debug(1 << CXGBI_DBG_PDU_RX,
1843 "skb 0x%p, op 0x%x, itt 0x%x, %u %s ddp'ed.\n",
1844 skb, opcode, ntohl(tcp_conn->in.hdr->itt),
1845 tcp_conn->in.datalen, offloaded ? "is" : "not");
1847 return read_pdu_skb(conn, skb, offset, offloaded);
1850 static void csk_return_rx_credits(struct cxgbi_sock *csk, int copied)
1852 struct cxgbi_device *cdev = csk->cdev;
1856 log_debug(1 << CXGBI_DBG_PDU_RX,
1857 "csk 0x%p,%u,0x%lx,%u, seq %u, wup %u, thre %u, %u.\n",
1858 csk, csk->state, csk->flags, csk->tid, csk->copied_seq,
1859 csk->rcv_wup, cdev->rx_credit_thres,
1862 if (csk->state != CTP_ESTABLISHED)
1865 credits = csk->copied_seq - csk->rcv_wup;
1866 if (unlikely(!credits))
1868 if (unlikely(cdev->rx_credit_thres == 0))
1871 must_send = credits + 16384 >= cdev->rcv_win;
1872 if (must_send || credits >= cdev->rx_credit_thres)
1873 csk->rcv_wup += cdev->csk_send_rx_credits(csk, credits);
1876 void cxgbi_conn_pdu_ready(struct cxgbi_sock *csk)
1878 struct cxgbi_device *cdev = csk->cdev;
1879 struct iscsi_conn *conn = csk->user_data;
1880 struct sk_buff *skb;
1881 unsigned int read = 0;
1884 log_debug(1 << CXGBI_DBG_PDU_RX,
1885 "csk 0x%p, conn 0x%p.\n", csk, conn);
1887 if (unlikely(!conn || conn->suspend_rx)) {
1888 log_debug(1 << CXGBI_DBG_PDU_RX,
1889 "csk 0x%p, conn 0x%p, id %d, suspend_rx %lu!\n",
1890 csk, conn, conn ? conn->id : 0xFF,
1891 conn ? conn->suspend_rx : 0xFF);
1896 skb = skb_peek(&csk->receive_queue);
1898 !(cxgbi_skcb_test_flag(skb, SKCBF_RX_STATUS))) {
1900 log_debug(1 << CXGBI_DBG_PDU_RX,
1901 "skb 0x%p, NOT ready 0x%lx.\n",
1902 skb, cxgbi_skcb_flags(skb));
1905 __skb_unlink(skb, &csk->receive_queue);
1907 read += cxgbi_skcb_rx_pdulen(skb);
1908 log_debug(1 << CXGBI_DBG_PDU_RX,
1909 "csk 0x%p, skb 0x%p,%u,f 0x%lx, pdu len %u.\n",
1910 csk, skb, skb->len, cxgbi_skcb_flags(skb),
1911 cxgbi_skcb_rx_pdulen(skb));
1913 if (cxgbi_skcb_test_flag(skb, SKCBF_RX_COALESCED)) {
1914 err = skb_read_pdu_bhs(conn, skb);
1916 pr_err("coalesced bhs, csk 0x%p, skb 0x%p,%u, "
1917 "f 0x%lx, plen %u.\n",
1919 cxgbi_skcb_flags(skb),
1920 cxgbi_skcb_rx_pdulen(skb));
1923 err = skb_read_pdu_data(conn, skb, skb,
1924 err + cdev->skb_rx_extra);
1926 pr_err("coalesced data, csk 0x%p, skb 0x%p,%u, "
1927 "f 0x%lx, plen %u.\n",
1929 cxgbi_skcb_flags(skb),
1930 cxgbi_skcb_rx_pdulen(skb));
1932 err = skb_read_pdu_bhs(conn, skb);
1934 pr_err("bhs, csk 0x%p, skb 0x%p,%u, "
1935 "f 0x%lx, plen %u.\n",
1937 cxgbi_skcb_flags(skb),
1938 cxgbi_skcb_rx_pdulen(skb));
1942 if (cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) {
1943 struct sk_buff *dskb;
1945 dskb = skb_peek(&csk->receive_queue);
1947 pr_err("csk 0x%p, skb 0x%p,%u, f 0x%lx,"
1948 " plen %u, NO data.\n",
1950 cxgbi_skcb_flags(skb),
1951 cxgbi_skcb_rx_pdulen(skb));
1955 __skb_unlink(dskb, &csk->receive_queue);
1957 err = skb_read_pdu_data(conn, skb, dskb, 0);
1959 pr_err("data, csk 0x%p, skb 0x%p,%u, "
1960 "f 0x%lx, plen %u, dskb 0x%p,"
1963 cxgbi_skcb_flags(skb),
1964 cxgbi_skcb_rx_pdulen(skb),
1968 err = skb_read_pdu_data(conn, skb, skb, 0);
1977 log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, read %u.\n", csk, read);
1979 csk->copied_seq += read;
1980 csk_return_rx_credits(csk, read);
1981 conn->rxdata_octets += read;
1985 pr_info("csk 0x%p, 0x%p, rx failed %d, read %u.\n",
1986 csk, conn, err, read);
1987 iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
1990 EXPORT_SYMBOL_GPL(cxgbi_conn_pdu_ready);
1992 static int sgl_seek_offset(struct scatterlist *sgl, unsigned int sgcnt,
1993 unsigned int offset, unsigned int *off,
1994 struct scatterlist **sgp)
1997 struct scatterlist *sg;
1999 for_each_sg(sgl, sg, sgcnt, i) {
2000 if (offset < sg->length) {
2005 offset -= sg->length;
2010 static int sgl_read_to_frags(struct scatterlist *sg, unsigned int sgoffset,
2011 unsigned int dlen, struct page_frag *frags,
2014 unsigned int datalen = dlen;
2015 unsigned int sglen = sg->length - sgoffset;
2016 struct page *page = sg_page(sg);
2026 pr_warn("sg %d NULL, len %u/%u.\n",
2035 copy = min(datalen, sglen);
2036 if (i && page == frags[i - 1].page &&
2037 sgoffset + sg->offset ==
2038 frags[i - 1].offset + frags[i - 1].size) {
2039 frags[i - 1].size += copy;
2041 if (i >= frag_max) {
2042 pr_warn("too many pages %u, dlen %u.\n",
2047 frags[i].page = page;
2048 frags[i].offset = sg->offset + sgoffset;
2049 frags[i].size = copy;
2060 int cxgbi_conn_alloc_pdu(struct iscsi_task *task, u8 opcode)
2062 struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
2063 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2064 struct cxgbi_device *cdev = cconn->chba->cdev;
2065 struct iscsi_conn *conn = task->conn;
2066 struct iscsi_tcp_task *tcp_task = task->dd_data;
2067 struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
2068 struct scsi_cmnd *sc = task->sc;
2069 int headroom = SKB_TX_ISCSI_PDU_HEADER_MAX;
2071 tcp_task->dd_data = tdata;
2074 if (SKB_MAX_HEAD(cdev->skb_tx_rsvd) > (512 * MAX_SKB_FRAGS) &&
2075 (opcode == ISCSI_OP_SCSI_DATA_OUT ||
2076 (opcode == ISCSI_OP_SCSI_CMD &&
2077 (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_TO_DEVICE))))
2078 /* data could goes into skb head */
2079 headroom += min_t(unsigned int,
2080 SKB_MAX_HEAD(cdev->skb_tx_rsvd),
2081 conn->max_xmit_dlength);
2083 tdata->skb = alloc_skb(cdev->skb_tx_rsvd + headroom, GFP_ATOMIC);
2085 struct cxgbi_sock *csk = cconn->cep->csk;
2086 struct net_device *ndev = cdev->ports[csk->port_id];
2087 ndev->stats.tx_dropped++;
2091 skb_reserve(tdata->skb, cdev->skb_tx_rsvd);
2092 task->hdr = (struct iscsi_hdr *)tdata->skb->data;
2093 task->hdr_max = SKB_TX_ISCSI_PDU_HEADER_MAX; /* BHS + AHS */
2095 /* data_out uses scsi_cmd's itt */
2096 if (opcode != ISCSI_OP_SCSI_DATA_OUT)
2097 task_reserve_itt(task, &task->hdr->itt);
2099 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
2100 "task 0x%p, op 0x%x, skb 0x%p,%u+%u/%u, itt 0x%x.\n",
2101 task, opcode, tdata->skb, cdev->skb_tx_rsvd, headroom,
2102 conn->max_xmit_dlength, ntohl(task->hdr->itt));
2106 EXPORT_SYMBOL_GPL(cxgbi_conn_alloc_pdu);
2108 static inline void tx_skb_setmode(struct sk_buff *skb, int hcrc, int dcrc)
2117 cxgbi_skcb_ulp_mode(skb) = (ULP2_MODE_ISCSI << 4) | submode;
2119 cxgbi_skcb_ulp_mode(skb) = 0;
2122 int cxgbi_conn_init_pdu(struct iscsi_task *task, unsigned int offset,
2125 struct iscsi_conn *conn = task->conn;
2126 struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
2127 struct sk_buff *skb = tdata->skb;
2128 unsigned int datalen = count;
2129 int i, padlen = iscsi_padding(count);
2132 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
2133 "task 0x%p,0x%p, skb 0x%p, 0x%x,0x%x,0x%x, %u+%u.\n",
2134 task, task->sc, skb, (*skb->data) & ISCSI_OPCODE_MASK,
2135 ntohl(task->cmdsn), ntohl(task->hdr->itt), offset, count);
2137 skb_put(skb, task->hdr_len);
2138 tx_skb_setmode(skb, conn->hdrdgst_en, datalen ? conn->datadgst_en : 0);
2143 struct scsi_data_buffer *sdb = scsi_out(task->sc);
2144 struct scatterlist *sg = NULL;
2147 tdata->offset = offset;
2148 tdata->count = count;
2149 err = sgl_seek_offset(
2150 sdb->table.sgl, sdb->table.nents,
2151 tdata->offset, &tdata->sgoffset, &sg);
2153 pr_warn("tpdu, sgl %u, bad offset %u/%u.\n",
2154 sdb->table.nents, tdata->offset, sdb->length);
2157 err = sgl_read_to_frags(sg, tdata->sgoffset, tdata->count,
2158 tdata->frags, MAX_PDU_FRAGS);
2160 pr_warn("tpdu, sgl %u, bad offset %u + %u.\n",
2161 sdb->table.nents, tdata->offset, tdata->count);
2164 tdata->nr_frags = err;
2166 if (tdata->nr_frags > MAX_SKB_FRAGS ||
2167 (padlen && tdata->nr_frags == MAX_SKB_FRAGS)) {
2168 char *dst = skb->data + task->hdr_len;
2169 struct page_frag *frag = tdata->frags;
2171 /* data fits in the skb's headroom */
2172 for (i = 0; i < tdata->nr_frags; i++, frag++) {
2173 char *src = kmap_atomic(frag->page);
2175 memcpy(dst, src+frag->offset, frag->size);
2180 memset(dst, 0, padlen);
2183 skb_put(skb, count + padlen);
2185 /* data fit into frag_list */
2186 for (i = 0; i < tdata->nr_frags; i++) {
2187 __skb_fill_page_desc(skb, i,
2188 tdata->frags[i].page,
2189 tdata->frags[i].offset,
2190 tdata->frags[i].size);
2191 skb_frag_ref(skb, i);
2193 skb_shinfo(skb)->nr_frags = tdata->nr_frags;
2195 skb->data_len += count;
2196 skb->truesize += count;
2200 pg = virt_to_page(task->data);
2203 skb_fill_page_desc(skb, 0, pg, offset_in_page(task->data),
2206 skb->data_len += count;
2207 skb->truesize += count;
2211 i = skb_shinfo(skb)->nr_frags;
2212 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
2213 virt_to_page(padding), offset_in_page(padding),
2216 skb->data_len += padlen;
2217 skb->truesize += padlen;
2223 EXPORT_SYMBOL_GPL(cxgbi_conn_init_pdu);
2225 int cxgbi_conn_xmit_pdu(struct iscsi_task *task)
2227 struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
2228 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2229 struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
2230 struct sk_buff *skb = tdata->skb;
2231 unsigned int datalen;
2235 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
2236 "task 0x%p, skb NULL.\n", task);
2240 datalen = skb->data_len;
2242 err = cxgbi_sock_send_pdus(cconn->cep->csk, skb);
2246 log_debug(1 << CXGBI_DBG_PDU_TX,
2247 "task 0x%p,0x%p, skb 0x%p, len %u/%u, rv %d.\n",
2248 task, task->sc, skb, skb->len, skb->data_len, err);
2250 if (task->conn->hdrdgst_en)
2251 pdulen += ISCSI_DIGEST_SIZE;
2253 if (datalen && task->conn->datadgst_en)
2254 pdulen += ISCSI_DIGEST_SIZE;
2256 task->conn->txdata_octets += pdulen;
2260 if (err == -EAGAIN || err == -ENOBUFS) {
2261 log_debug(1 << CXGBI_DBG_PDU_TX,
2262 "task 0x%p, skb 0x%p, len %u/%u, %d EAGAIN.\n",
2263 task, skb, skb->len, skb->data_len, err);
2264 /* reset skb to send when we are called again */
2270 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
2271 "itt 0x%x, skb 0x%p, len %u/%u, xmit err %d.\n",
2272 task->itt, skb, skb->len, skb->data_len, err);
2273 iscsi_conn_printk(KERN_ERR, task->conn, "xmit err %d.\n", err);
2274 iscsi_conn_failure(task->conn, ISCSI_ERR_XMIT_FAILED);
2277 EXPORT_SYMBOL_GPL(cxgbi_conn_xmit_pdu);
2279 void cxgbi_cleanup_task(struct iscsi_task *task)
2281 struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
2283 log_debug(1 << CXGBI_DBG_ISCSI,
2284 "task 0x%p, skb 0x%p, itt 0x%x.\n",
2285 task, tdata->skb, task->hdr_itt);
2287 /* never reached the xmit task callout */
2289 __kfree_skb(tdata->skb);
2290 memset(tdata, 0, sizeof(*tdata));
2292 task_release_itt(task, task->hdr_itt);
2293 iscsi_tcp_cleanup_task(task);
2295 EXPORT_SYMBOL_GPL(cxgbi_cleanup_task);
2297 void cxgbi_get_conn_stats(struct iscsi_cls_conn *cls_conn,
2298 struct iscsi_stats *stats)
2300 struct iscsi_conn *conn = cls_conn->dd_data;
2302 stats->txdata_octets = conn->txdata_octets;
2303 stats->rxdata_octets = conn->rxdata_octets;
2304 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
2305 stats->dataout_pdus = conn->dataout_pdus_cnt;
2306 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
2307 stats->datain_pdus = conn->datain_pdus_cnt;
2308 stats->r2t_pdus = conn->r2t_pdus_cnt;
2309 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
2310 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
2311 stats->digest_err = 0;
2312 stats->timeout_err = 0;
2313 stats->custom_length = 1;
2314 strcpy(stats->custom[0].desc, "eh_abort_cnt");
2315 stats->custom[0].value = conn->eh_abort_cnt;
2317 EXPORT_SYMBOL_GPL(cxgbi_get_conn_stats);
2319 static int cxgbi_conn_max_xmit_dlength(struct iscsi_conn *conn)
2321 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
2322 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2323 struct cxgbi_device *cdev = cconn->chba->cdev;
2324 unsigned int headroom = SKB_MAX_HEAD(cdev->skb_tx_rsvd);
2325 unsigned int max_def = 512 * MAX_SKB_FRAGS;
2326 unsigned int max = max(max_def, headroom);
2328 max = min(cconn->chba->cdev->tx_max_size, max);
2329 if (conn->max_xmit_dlength)
2330 conn->max_xmit_dlength = min(conn->max_xmit_dlength, max);
2332 conn->max_xmit_dlength = max;
2333 cxgbi_align_pdu_size(conn->max_xmit_dlength);
2338 static int cxgbi_conn_max_recv_dlength(struct iscsi_conn *conn)
2340 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
2341 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2342 unsigned int max = cconn->chba->cdev->rx_max_size;
2344 cxgbi_align_pdu_size(max);
2346 if (conn->max_recv_dlength) {
2347 if (conn->max_recv_dlength > max) {
2348 pr_err("MaxRecvDataSegmentLength %u > %u.\n",
2349 conn->max_recv_dlength, max);
2352 conn->max_recv_dlength = min(conn->max_recv_dlength, max);
2353 cxgbi_align_pdu_size(conn->max_recv_dlength);
2355 conn->max_recv_dlength = max;
2360 int cxgbi_set_conn_param(struct iscsi_cls_conn *cls_conn,
2361 enum iscsi_param param, char *buf, int buflen)
2363 struct iscsi_conn *conn = cls_conn->dd_data;
2364 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
2365 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2366 struct cxgbi_sock *csk = cconn->cep->csk;
2369 log_debug(1 << CXGBI_DBG_ISCSI,
2370 "cls_conn 0x%p, param %d, buf(%d) %s.\n",
2371 cls_conn, param, buflen, buf);
2374 case ISCSI_PARAM_HDRDGST_EN:
2375 err = iscsi_set_param(cls_conn, param, buf, buflen);
2376 if (!err && conn->hdrdgst_en)
2377 err = csk->cdev->csk_ddp_setup_digest(csk, csk->tid,
2379 conn->datadgst_en, 0);
2381 case ISCSI_PARAM_DATADGST_EN:
2382 err = iscsi_set_param(cls_conn, param, buf, buflen);
2383 if (!err && conn->datadgst_en)
2384 err = csk->cdev->csk_ddp_setup_digest(csk, csk->tid,
2386 conn->datadgst_en, 0);
2388 case ISCSI_PARAM_MAX_R2T:
2389 return iscsi_tcp_set_max_r2t(conn, buf);
2390 case ISCSI_PARAM_MAX_RECV_DLENGTH:
2391 err = iscsi_set_param(cls_conn, param, buf, buflen);
2393 err = cxgbi_conn_max_recv_dlength(conn);
2395 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
2396 err = iscsi_set_param(cls_conn, param, buf, buflen);
2398 err = cxgbi_conn_max_xmit_dlength(conn);
2401 return iscsi_set_param(cls_conn, param, buf, buflen);
2405 EXPORT_SYMBOL_GPL(cxgbi_set_conn_param);
2407 static inline int csk_print_port(struct cxgbi_sock *csk, char *buf)
2411 cxgbi_sock_get(csk);
2412 len = sprintf(buf, "%hu\n", ntohs(csk->daddr.sin_port));
2413 cxgbi_sock_put(csk);
2418 static inline int csk_print_ip(struct cxgbi_sock *csk, char *buf)
2422 cxgbi_sock_get(csk);
2423 if (csk->csk_family == AF_INET)
2424 len = sprintf(buf, "%pI4",
2425 &csk->daddr.sin_addr.s_addr);
2427 len = sprintf(buf, "%pI6",
2428 &csk->daddr6.sin6_addr);
2430 cxgbi_sock_put(csk);
2435 int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param param,
2438 struct cxgbi_endpoint *cep = ep->dd_data;
2439 struct cxgbi_sock *csk;
2442 log_debug(1 << CXGBI_DBG_ISCSI,
2443 "cls_conn 0x%p, param %d.\n", ep, param);
2446 case ISCSI_PARAM_CONN_PORT:
2447 case ISCSI_PARAM_CONN_ADDRESS:
2455 return iscsi_conn_get_addr_param((struct sockaddr_storage *)
2456 &csk->daddr, param, buf);
2462 EXPORT_SYMBOL_GPL(cxgbi_get_ep_param);
2464 struct iscsi_cls_conn *
2465 cxgbi_create_conn(struct iscsi_cls_session *cls_session, u32 cid)
2467 struct iscsi_cls_conn *cls_conn;
2468 struct iscsi_conn *conn;
2469 struct iscsi_tcp_conn *tcp_conn;
2470 struct cxgbi_conn *cconn;
2472 cls_conn = iscsi_tcp_conn_setup(cls_session, sizeof(*cconn), cid);
2476 conn = cls_conn->dd_data;
2477 tcp_conn = conn->dd_data;
2478 cconn = tcp_conn->dd_data;
2479 cconn->iconn = conn;
2481 log_debug(1 << CXGBI_DBG_ISCSI,
2482 "cid %u(0x%x), cls 0x%p,0x%p, conn 0x%p,0x%p,0x%p.\n",
2483 cid, cid, cls_session, cls_conn, conn, tcp_conn, cconn);
2487 EXPORT_SYMBOL_GPL(cxgbi_create_conn);
2489 int cxgbi_bind_conn(struct iscsi_cls_session *cls_session,
2490 struct iscsi_cls_conn *cls_conn,
2491 u64 transport_eph, int is_leading)
2493 struct iscsi_conn *conn = cls_conn->dd_data;
2494 struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
2495 struct cxgbi_conn *cconn = tcp_conn->dd_data;
2496 struct iscsi_endpoint *ep;
2497 struct cxgbi_endpoint *cep;
2498 struct cxgbi_sock *csk;
2501 ep = iscsi_lookup_endpoint(transport_eph);
2505 /* setup ddp pagesize */
2508 err = csk->cdev->csk_ddp_setup_pgidx(csk, csk->tid, page_idx, 0);
2512 err = iscsi_conn_bind(cls_session, cls_conn, is_leading);
2516 /* calculate the tag idx bits needed for this conn based on cmds_max */
2517 cconn->task_idx_bits = (__ilog2_u32(conn->session->cmds_max - 1)) + 1;
2519 write_lock_bh(&csk->callback_lock);
2520 csk->user_data = conn;
2521 cconn->chba = cep->chba;
2524 write_unlock_bh(&csk->callback_lock);
2526 cxgbi_conn_max_xmit_dlength(conn);
2527 cxgbi_conn_max_recv_dlength(conn);
2529 log_debug(1 << CXGBI_DBG_ISCSI,
2530 "cls 0x%p,0x%p, ep 0x%p, cconn 0x%p, csk 0x%p.\n",
2531 cls_session, cls_conn, ep, cconn, csk);
2532 /* init recv engine */
2533 iscsi_tcp_hdr_recv_prep(tcp_conn);
2537 EXPORT_SYMBOL_GPL(cxgbi_bind_conn);
2539 struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *ep,
2540 u16 cmds_max, u16 qdepth,
2543 struct cxgbi_endpoint *cep;
2544 struct cxgbi_hba *chba;
2545 struct Scsi_Host *shost;
2546 struct iscsi_cls_session *cls_session;
2547 struct iscsi_session *session;
2550 pr_err("missing endpoint.\n");
2556 shost = chba->shost;
2558 BUG_ON(chba != iscsi_host_priv(shost));
2560 cls_session = iscsi_session_setup(chba->cdev->itp, shost,
2562 sizeof(struct iscsi_tcp_task) +
2563 sizeof(struct cxgbi_task_data),
2564 initial_cmdsn, ISCSI_MAX_TARGET);
2568 session = cls_session->dd_data;
2569 if (iscsi_tcp_r2tpool_alloc(session))
2570 goto remove_session;
2572 log_debug(1 << CXGBI_DBG_ISCSI,
2573 "ep 0x%p, cls sess 0x%p.\n", ep, cls_session);
2577 iscsi_session_teardown(cls_session);
2580 EXPORT_SYMBOL_GPL(cxgbi_create_session);
2582 void cxgbi_destroy_session(struct iscsi_cls_session *cls_session)
2584 log_debug(1 << CXGBI_DBG_ISCSI,
2585 "cls sess 0x%p.\n", cls_session);
2587 iscsi_tcp_r2tpool_free(cls_session->dd_data);
2588 iscsi_session_teardown(cls_session);
2590 EXPORT_SYMBOL_GPL(cxgbi_destroy_session);
2592 int cxgbi_set_host_param(struct Scsi_Host *shost, enum iscsi_host_param param,
2593 char *buf, int buflen)
2595 struct cxgbi_hba *chba = iscsi_host_priv(shost);
2598 shost_printk(KERN_ERR, shost, "Could not get host param. "
2599 "netdev for host not set.\n");
2603 log_debug(1 << CXGBI_DBG_ISCSI,
2604 "shost 0x%p, hba 0x%p,%s, param %d, buf(%d) %s.\n",
2605 shost, chba, chba->ndev->name, param, buflen, buf);
2608 case ISCSI_HOST_PARAM_IPADDRESS:
2610 __be32 addr = in_aton(buf);
2611 log_debug(1 << CXGBI_DBG_ISCSI,
2612 "hba %s, req. ipv4 %pI4.\n", chba->ndev->name, &addr);
2613 cxgbi_set_iscsi_ipv4(chba, addr);
2616 case ISCSI_HOST_PARAM_HWADDRESS:
2617 case ISCSI_HOST_PARAM_NETDEV_NAME:
2620 return iscsi_host_set_param(shost, param, buf, buflen);
2623 EXPORT_SYMBOL_GPL(cxgbi_set_host_param);
2625 int cxgbi_get_host_param(struct Scsi_Host *shost, enum iscsi_host_param param,
2628 struct cxgbi_hba *chba = iscsi_host_priv(shost);
2632 shost_printk(KERN_ERR, shost, "Could not get host param. "
2633 "netdev for host not set.\n");
2637 log_debug(1 << CXGBI_DBG_ISCSI,
2638 "shost 0x%p, hba 0x%p,%s, param %d.\n",
2639 shost, chba, chba->ndev->name, param);
2642 case ISCSI_HOST_PARAM_HWADDRESS:
2643 len = sysfs_format_mac(buf, chba->ndev->dev_addr, 6);
2645 case ISCSI_HOST_PARAM_NETDEV_NAME:
2646 len = sprintf(buf, "%s\n", chba->ndev->name);
2648 case ISCSI_HOST_PARAM_IPADDRESS:
2652 addr = cxgbi_get_iscsi_ipv4(chba);
2653 len = sprintf(buf, "%pI4", &addr);
2654 log_debug(1 << CXGBI_DBG_ISCSI,
2655 "hba %s, ipv4 %pI4.\n", chba->ndev->name, &addr);
2659 return iscsi_host_get_param(shost, param, buf);
2664 EXPORT_SYMBOL_GPL(cxgbi_get_host_param);
2666 struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *shost,
2667 struct sockaddr *dst_addr,
2670 struct iscsi_endpoint *ep;
2671 struct cxgbi_endpoint *cep;
2672 struct cxgbi_hba *hba = NULL;
2673 struct cxgbi_sock *csk;
2676 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK,
2677 "shost 0x%p, non_blocking %d, dst_addr 0x%p.\n",
2678 shost, non_blocking, dst_addr);
2681 hba = iscsi_host_priv(shost);
2683 pr_info("shost 0x%p, priv NULL.\n", shost);
2688 if (dst_addr->sa_family == AF_INET) {
2689 csk = cxgbi_check_route(dst_addr);
2690 #if IS_ENABLED(CONFIG_IPV6)
2691 } else if (dst_addr->sa_family == AF_INET6) {
2692 csk = cxgbi_check_route6(dst_addr);
2695 pr_info("address family 0x%x NOT supported.\n",
2696 dst_addr->sa_family);
2697 err = -EAFNOSUPPORT;
2698 return (struct iscsi_endpoint *)ERR_PTR(err);
2702 return (struct iscsi_endpoint *)csk;
2703 cxgbi_sock_get(csk);
2706 hba = csk->cdev->hbas[csk->port_id];
2707 else if (hba != csk->cdev->hbas[csk->port_id]) {
2708 pr_info("Could not connect through requested host %u"
2709 "hba 0x%p != 0x%p (%u).\n",
2710 shost->host_no, hba,
2711 csk->cdev->hbas[csk->port_id], csk->port_id);
2716 err = sock_get_port(csk);
2720 cxgbi_sock_set_state(csk, CTP_CONNECTING);
2721 err = csk->cdev->csk_init_act_open(csk);
2725 if (cxgbi_sock_is_closing(csk)) {
2727 pr_info("csk 0x%p is closing.\n", csk);
2731 ep = iscsi_create_endpoint(sizeof(*cep));
2734 pr_info("iscsi alloc ep, OOM.\n");
2742 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK,
2743 "ep 0x%p, cep 0x%p, csk 0x%p, hba 0x%p,%s.\n",
2744 ep, cep, csk, hba, hba->ndev->name);
2748 cxgbi_sock_put(csk);
2749 cxgbi_sock_closed(csk);
2751 return ERR_PTR(err);
2753 EXPORT_SYMBOL_GPL(cxgbi_ep_connect);
2755 int cxgbi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
2757 struct cxgbi_endpoint *cep = ep->dd_data;
2758 struct cxgbi_sock *csk = cep->csk;
2760 if (!cxgbi_sock_is_established(csk))
2764 EXPORT_SYMBOL_GPL(cxgbi_ep_poll);
2766 void cxgbi_ep_disconnect(struct iscsi_endpoint *ep)
2768 struct cxgbi_endpoint *cep = ep->dd_data;
2769 struct cxgbi_conn *cconn = cep->cconn;
2770 struct cxgbi_sock *csk = cep->csk;
2772 log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK,
2773 "ep 0x%p, cep 0x%p, cconn 0x%p, csk 0x%p,%u,0x%lx.\n",
2774 ep, cep, cconn, csk, csk->state, csk->flags);
2776 if (cconn && cconn->iconn) {
2777 iscsi_suspend_tx(cconn->iconn);
2778 write_lock_bh(&csk->callback_lock);
2779 cep->csk->user_data = NULL;
2781 write_unlock_bh(&csk->callback_lock);
2783 iscsi_destroy_endpoint(ep);
2785 if (likely(csk->state >= CTP_ESTABLISHED))
2786 need_active_close(csk);
2788 cxgbi_sock_closed(csk);
2790 cxgbi_sock_put(csk);
2792 EXPORT_SYMBOL_GPL(cxgbi_ep_disconnect);
2794 int cxgbi_iscsi_init(struct iscsi_transport *itp,
2795 struct scsi_transport_template **stt)
2797 *stt = iscsi_register_transport(itp);
2799 pr_err("unable to register %s transport 0x%p.\n",
2803 log_debug(1 << CXGBI_DBG_ISCSI,
2804 "%s, registered iscsi transport 0x%p.\n",
2808 EXPORT_SYMBOL_GPL(cxgbi_iscsi_init);
2810 void cxgbi_iscsi_cleanup(struct iscsi_transport *itp,
2811 struct scsi_transport_template **stt)
2814 log_debug(1 << CXGBI_DBG_ISCSI,
2815 "de-register transport 0x%p, %s, stt 0x%p.\n",
2816 itp, itp->name, *stt);
2818 iscsi_unregister_transport(itp);
2821 EXPORT_SYMBOL_GPL(cxgbi_iscsi_cleanup);
2823 umode_t cxgbi_attr_is_visible(int param_type, int param)
2825 switch (param_type) {
2826 case ISCSI_HOST_PARAM:
2828 case ISCSI_HOST_PARAM_NETDEV_NAME:
2829 case ISCSI_HOST_PARAM_HWADDRESS:
2830 case ISCSI_HOST_PARAM_IPADDRESS:
2831 case ISCSI_HOST_PARAM_INITIATOR_NAME:
2838 case ISCSI_PARAM_MAX_RECV_DLENGTH:
2839 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
2840 case ISCSI_PARAM_HDRDGST_EN:
2841 case ISCSI_PARAM_DATADGST_EN:
2842 case ISCSI_PARAM_CONN_ADDRESS:
2843 case ISCSI_PARAM_CONN_PORT:
2844 case ISCSI_PARAM_EXP_STATSN:
2845 case ISCSI_PARAM_PERSISTENT_ADDRESS:
2846 case ISCSI_PARAM_PERSISTENT_PORT:
2847 case ISCSI_PARAM_PING_TMO:
2848 case ISCSI_PARAM_RECV_TMO:
2849 case ISCSI_PARAM_INITIAL_R2T_EN:
2850 case ISCSI_PARAM_MAX_R2T:
2851 case ISCSI_PARAM_IMM_DATA_EN:
2852 case ISCSI_PARAM_FIRST_BURST:
2853 case ISCSI_PARAM_MAX_BURST:
2854 case ISCSI_PARAM_PDU_INORDER_EN:
2855 case ISCSI_PARAM_DATASEQ_INORDER_EN:
2856 case ISCSI_PARAM_ERL:
2857 case ISCSI_PARAM_TARGET_NAME:
2858 case ISCSI_PARAM_TPGT:
2859 case ISCSI_PARAM_USERNAME:
2860 case ISCSI_PARAM_PASSWORD:
2861 case ISCSI_PARAM_USERNAME_IN:
2862 case ISCSI_PARAM_PASSWORD_IN:
2863 case ISCSI_PARAM_FAST_ABORT:
2864 case ISCSI_PARAM_ABORT_TMO:
2865 case ISCSI_PARAM_LU_RESET_TMO:
2866 case ISCSI_PARAM_TGT_RESET_TMO:
2867 case ISCSI_PARAM_IFACE_NAME:
2868 case ISCSI_PARAM_INITIATOR_NAME:
2877 EXPORT_SYMBOL_GPL(cxgbi_attr_is_visible);
2879 static int __init libcxgbi_init_module(void)
2881 sw_tag_idx_bits = (__ilog2_u32(ISCSI_ITT_MASK)) + 1;
2882 sw_tag_age_bits = (__ilog2_u32(ISCSI_AGE_MASK)) + 1;
2884 pr_info("tag itt 0x%x, %u bits, age 0x%x, %u bits.\n",
2885 ISCSI_ITT_MASK, sw_tag_idx_bits,
2886 ISCSI_AGE_MASK, sw_tag_age_bits);
2888 ddp_setup_host_page_size();
2892 static void __exit libcxgbi_exit_module(void)
2894 cxgbi_device_unregister_all(0xFF);
2898 module_init(libcxgbi_init_module);
2899 module_exit(libcxgbi_exit_module);