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
);