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 static struct cxgbi_device
*cxgbi_device_find_by_mac(struct net_device
*ndev
,
281 struct net_device
*vdev
= NULL
;
282 struct cxgbi_device
*cdev
, *tmp
;
285 if (ndev
->priv_flags
& IFF_802_1Q_VLAN
) {
287 ndev
= vlan_dev_real_dev(ndev
);
288 pr_info("vlan dev %s -> %s.\n", vdev
->name
, ndev
->name
);
291 mutex_lock(&cdev_mutex
);
292 list_for_each_entry_safe(cdev
, tmp
, &cdev_list
, list_head
) {
293 for (i
= 0; i
< cdev
->nports
; i
++) {
294 if (!memcmp(ndev
->dev_addr
, cdev
->ports
[i
]->dev_addr
,
296 cdev
->hbas
[i
]->vdev
= vdev
;
297 mutex_unlock(&cdev_mutex
);
304 mutex_unlock(&cdev_mutex
);
305 log_debug(1 << CXGBI_DBG_DEV
,
306 "ndev 0x%p, %s, NO match mac found.\n",
311 void cxgbi_hbas_remove(struct cxgbi_device
*cdev
)
314 struct cxgbi_hba
*chba
;
316 log_debug(1 << CXGBI_DBG_DEV
,
317 "cdev 0x%p, p#%u.\n", cdev
, cdev
->nports
);
319 for (i
= 0; i
< cdev
->nports
; i
++) {
320 chba
= cdev
->hbas
[i
];
322 cdev
->hbas
[i
] = NULL
;
323 iscsi_host_remove(chba
->shost
);
324 pci_dev_put(cdev
->pdev
);
325 iscsi_host_free(chba
->shost
);
329 EXPORT_SYMBOL_GPL(cxgbi_hbas_remove
);
331 int cxgbi_hbas_add(struct cxgbi_device
*cdev
, u64 max_lun
,
332 unsigned int max_id
, struct scsi_host_template
*sht
,
333 struct scsi_transport_template
*stt
)
335 struct cxgbi_hba
*chba
;
336 struct Scsi_Host
*shost
;
339 log_debug(1 << CXGBI_DBG_DEV
, "cdev 0x%p, p#%u.\n", cdev
, cdev
->nports
);
341 for (i
= 0; i
< cdev
->nports
; i
++) {
342 shost
= iscsi_host_alloc(sht
, sizeof(*chba
), 1);
344 pr_info("0x%p, p%d, %s, host alloc failed.\n",
345 cdev
, i
, cdev
->ports
[i
]->name
);
350 shost
->transportt
= stt
;
351 shost
->max_lun
= max_lun
;
352 shost
->max_id
= max_id
;
353 shost
->max_channel
= 0;
354 shost
->max_cmd_len
= 16;
356 chba
= iscsi_host_priv(shost
);
358 chba
->ndev
= cdev
->ports
[i
];
361 log_debug(1 << CXGBI_DBG_DEV
,
362 "cdev 0x%p, p#%d %s: chba 0x%p.\n",
363 cdev
, i
, cdev
->ports
[i
]->name
, chba
);
365 pci_dev_get(cdev
->pdev
);
366 err
= iscsi_host_add(shost
, &cdev
->pdev
->dev
);
368 pr_info("cdev 0x%p, p#%d %s, host add failed.\n",
369 cdev
, i
, cdev
->ports
[i
]->name
);
370 pci_dev_put(cdev
->pdev
);
371 scsi_host_put(shost
);
375 cdev
->hbas
[i
] = chba
;
381 cxgbi_hbas_remove(cdev
);
384 EXPORT_SYMBOL_GPL(cxgbi_hbas_add
);
389 * - source port management
390 * To find a free source port in the port allocation map we use a very simple
391 * rotor scheme to look for the next free port.
393 * If a source port has been specified make sure that it doesn't collide with
394 * our normal source port allocation map. If it's outside the range of our
395 * allocation/deallocation scheme just let them use it.
397 * If the source port is outside our allocation range, the caller is
398 * responsible for keeping track of their port usage.
400 static int sock_get_port(struct cxgbi_sock
*csk
)
402 struct cxgbi_device
*cdev
= csk
->cdev
;
403 struct cxgbi_ports_map
*pmap
= &cdev
->pmap
;
408 if (!pmap
->max_connect
) {
409 pr_err("cdev 0x%p, p#%u %s, NO port map.\n",
410 cdev
, csk
->port_id
, cdev
->ports
[csk
->port_id
]->name
);
411 return -EADDRNOTAVAIL
;
414 if (csk
->csk_family
== AF_INET
)
415 port
= &csk
->saddr
.sin_port
;
417 port
= &csk
->saddr6
.sin6_port
;
420 pr_err("source port NON-ZERO %u.\n",
425 spin_lock_bh(&pmap
->lock
);
426 if (pmap
->used
>= pmap
->max_connect
) {
427 spin_unlock_bh(&pmap
->lock
);
428 pr_info("cdev 0x%p, p#%u %s, ALL ports used.\n",
429 cdev
, csk
->port_id
, cdev
->ports
[csk
->port_id
]->name
);
430 return -EADDRNOTAVAIL
;
433 start
= idx
= pmap
->next
;
435 if (++idx
>= pmap
->max_connect
)
437 if (!pmap
->port_csk
[idx
]) {
439 *port
= htons(pmap
->sport_base
+ idx
);
441 pmap
->port_csk
[idx
] = csk
;
442 spin_unlock_bh(&pmap
->lock
);
444 log_debug(1 << CXGBI_DBG_SOCK
,
445 "cdev 0x%p, p#%u %s, p %u, %u.\n",
447 cdev
->ports
[csk
->port_id
]->name
,
448 pmap
->sport_base
+ idx
, pmap
->next
);
451 } while (idx
!= start
);
452 spin_unlock_bh(&pmap
->lock
);
454 /* should not happen */
455 pr_warn("cdev 0x%p, p#%u %s, next %u?\n",
456 cdev
, csk
->port_id
, cdev
->ports
[csk
->port_id
]->name
,
458 return -EADDRNOTAVAIL
;
461 static void sock_put_port(struct cxgbi_sock
*csk
)
463 struct cxgbi_device
*cdev
= csk
->cdev
;
464 struct cxgbi_ports_map
*pmap
= &cdev
->pmap
;
467 if (csk
->csk_family
== AF_INET
)
468 port
= &csk
->saddr
.sin_port
;
470 port
= &csk
->saddr6
.sin6_port
;
473 int idx
= ntohs(*port
) - pmap
->sport_base
;
476 if (idx
< 0 || idx
>= pmap
->max_connect
) {
477 pr_err("cdev 0x%p, p#%u %s, port %u OOR.\n",
479 cdev
->ports
[csk
->port_id
]->name
,
484 spin_lock_bh(&pmap
->lock
);
485 pmap
->port_csk
[idx
] = NULL
;
487 spin_unlock_bh(&pmap
->lock
);
489 log_debug(1 << CXGBI_DBG_SOCK
,
490 "cdev 0x%p, p#%u %s, release %u.\n",
491 cdev
, csk
->port_id
, cdev
->ports
[csk
->port_id
]->name
,
492 pmap
->sport_base
+ idx
);
499 * iscsi tcp connection
501 void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock
*csk
)
503 if (csk
->cpl_close
) {
504 kfree_skb(csk
->cpl_close
);
505 csk
->cpl_close
= NULL
;
507 if (csk
->cpl_abort_req
) {
508 kfree_skb(csk
->cpl_abort_req
);
509 csk
->cpl_abort_req
= NULL
;
511 if (csk
->cpl_abort_rpl
) {
512 kfree_skb(csk
->cpl_abort_rpl
);
513 csk
->cpl_abort_rpl
= NULL
;
516 EXPORT_SYMBOL_GPL(cxgbi_sock_free_cpl_skbs
);
518 static struct cxgbi_sock
*cxgbi_sock_create(struct cxgbi_device
*cdev
)
520 struct cxgbi_sock
*csk
= kzalloc(sizeof(*csk
), GFP_NOIO
);
523 pr_info("alloc csk %zu failed.\n", sizeof(*csk
));
527 if (cdev
->csk_alloc_cpls(csk
) < 0) {
528 pr_info("csk 0x%p, alloc cpls failed.\n", csk
);
533 spin_lock_init(&csk
->lock
);
534 kref_init(&csk
->refcnt
);
535 skb_queue_head_init(&csk
->receive_queue
);
536 skb_queue_head_init(&csk
->write_queue
);
537 setup_timer(&csk
->retry_timer
, NULL
, (unsigned long)csk
);
538 rwlock_init(&csk
->callback_lock
);
541 cxgbi_sock_set_state(csk
, CTP_CLOSED
);
543 log_debug(1 << CXGBI_DBG_SOCK
, "cdev 0x%p, new csk 0x%p.\n", cdev
, csk
);
548 static struct rtable
*find_route_ipv4(struct flowi4
*fl4
,
549 __be32 saddr
, __be32 daddr
,
550 __be16 sport
, __be16 dport
, u8 tos
)
554 rt
= ip_route_output_ports(&init_net
, fl4
, NULL
, daddr
, saddr
,
555 dport
, sport
, IPPROTO_TCP
, tos
, 0);
562 static struct cxgbi_sock
*cxgbi_check_route(struct sockaddr
*dst_addr
)
564 struct sockaddr_in
*daddr
= (struct sockaddr_in
*)dst_addr
;
565 struct dst_entry
*dst
;
566 struct net_device
*ndev
;
567 struct cxgbi_device
*cdev
;
568 struct rtable
*rt
= NULL
;
571 struct cxgbi_sock
*csk
= NULL
;
572 unsigned int mtu
= 0;
576 rt
= find_route_ipv4(&fl4
, 0, daddr
->sin_addr
.s_addr
, 0, daddr
->sin_port
, 0);
578 pr_info("no route to ipv4 0x%x, port %u.\n",
579 be32_to_cpu(daddr
->sin_addr
.s_addr
),
580 be16_to_cpu(daddr
->sin_port
));
585 n
= dst_neigh_lookup(dst
, &daddr
->sin_addr
.s_addr
);
592 if (rt
->rt_flags
& (RTCF_MULTICAST
| RTCF_BROADCAST
)) {
593 pr_info("multi-cast route %pI4, port %u, dev %s.\n",
594 &daddr
->sin_addr
.s_addr
, ntohs(daddr
->sin_port
),
600 if (ndev
->flags
& IFF_LOOPBACK
) {
601 ndev
= ip_dev_find(&init_net
, daddr
->sin_addr
.s_addr
);
603 pr_info("rt dev %s, loopback -> %s, mtu %u.\n",
604 n
->dev
->name
, ndev
->name
, mtu
);
607 cdev
= cxgbi_device_find_by_netdev(ndev
, &port
);
609 pr_info("dst %pI4, %s, NOT cxgbi device.\n",
610 &daddr
->sin_addr
.s_addr
, ndev
->name
);
614 log_debug(1 << CXGBI_DBG_SOCK
,
615 "route to %pI4 :%u, ndev p#%d,%s, cdev 0x%p.\n",
616 &daddr
->sin_addr
.s_addr
, ntohs(daddr
->sin_port
),
617 port
, ndev
->name
, cdev
);
619 csk
= cxgbi_sock_create(cdev
);
629 csk
->csk_family
= AF_INET
;
630 csk
->daddr
.sin_addr
.s_addr
= daddr
->sin_addr
.s_addr
;
631 csk
->daddr
.sin_port
= daddr
->sin_port
;
632 csk
->daddr
.sin_family
= daddr
->sin_family
;
633 csk
->saddr
.sin_family
= daddr
->sin_family
;
634 csk
->saddr
.sin_addr
.s_addr
= fl4
.saddr
;
645 cxgbi_sock_closed(csk
);
650 #if IS_ENABLED(CONFIG_IPV6)
651 static struct rt6_info
*find_route_ipv6(const struct in6_addr
*saddr
,
652 const struct in6_addr
*daddr
)
657 memcpy(&fl
.saddr
, saddr
, sizeof(struct in6_addr
));
659 memcpy(&fl
.daddr
, daddr
, sizeof(struct in6_addr
));
660 return (struct rt6_info
*)ip6_route_output(&init_net
, NULL
, &fl
);
663 static struct cxgbi_sock
*cxgbi_check_route6(struct sockaddr
*dst_addr
)
665 struct sockaddr_in6
*daddr6
= (struct sockaddr_in6
*)dst_addr
;
666 struct dst_entry
*dst
;
667 struct net_device
*ndev
;
668 struct cxgbi_device
*cdev
;
669 struct rt6_info
*rt
= NULL
;
671 struct in6_addr pref_saddr
;
672 struct cxgbi_sock
*csk
= NULL
;
673 unsigned int mtu
= 0;
677 rt
= find_route_ipv6(NULL
, &daddr6
->sin6_addr
);
680 pr_info("no route to ipv6 %pI6 port %u\n",
681 daddr6
->sin6_addr
.s6_addr
,
682 be16_to_cpu(daddr6
->sin6_port
));
689 n
= dst_neigh_lookup(dst
, &daddr6
->sin6_addr
);
692 pr_info("%pI6, port %u, dst no neighbour.\n",
693 daddr6
->sin6_addr
.s6_addr
,
694 be16_to_cpu(daddr6
->sin6_port
));
700 if (ipv6_addr_is_multicast(&rt
->rt6i_dst
.addr
)) {
701 pr_info("multi-cast route %pI6 port %u, dev %s.\n",
702 daddr6
->sin6_addr
.s6_addr
,
703 ntohs(daddr6
->sin6_port
), ndev
->name
);
708 cdev
= cxgbi_device_find_by_netdev(ndev
, &port
);
710 cdev
= cxgbi_device_find_by_mac(ndev
, &port
);
712 pr_info("dst %pI6 %s, NOT cxgbi device.\n",
713 daddr6
->sin6_addr
.s6_addr
, ndev
->name
);
717 log_debug(1 << CXGBI_DBG_SOCK
,
718 "route to %pI6 :%u, ndev p#%d,%s, cdev 0x%p.\n",
719 daddr6
->sin6_addr
.s6_addr
, ntohs(daddr6
->sin6_port
), port
,
722 csk
= cxgbi_sock_create(cdev
);
732 if (ipv6_addr_any(&rt
->rt6i_prefsrc
.addr
)) {
733 struct inet6_dev
*idev
= ip6_dst_idev((struct dst_entry
*)rt
);
735 err
= ipv6_dev_get_saddr(&init_net
, idev
? idev
->dev
: NULL
,
736 &daddr6
->sin6_addr
, 0, &pref_saddr
);
738 pr_info("failed to get source address to reach %pI6\n",
743 pref_saddr
= rt
->rt6i_prefsrc
.addr
;
746 csk
->csk_family
= AF_INET6
;
747 csk
->daddr6
.sin6_addr
= daddr6
->sin6_addr
;
748 csk
->daddr6
.sin6_port
= daddr6
->sin6_port
;
749 csk
->daddr6
.sin6_family
= daddr6
->sin6_family
;
750 csk
->saddr6
.sin6_addr
= pref_saddr
;
761 cxgbi_sock_closed(csk
);
765 #endif /* IS_ENABLED(CONFIG_IPV6) */
767 void cxgbi_sock_established(struct cxgbi_sock
*csk
, unsigned int snd_isn
,
770 csk
->write_seq
= csk
->snd_nxt
= csk
->snd_una
= snd_isn
;
771 dst_confirm(csk
->dst
);
773 cxgbi_sock_set_state(csk
, CTP_ESTABLISHED
);
775 EXPORT_SYMBOL_GPL(cxgbi_sock_established
);
777 static void cxgbi_inform_iscsi_conn_closing(struct cxgbi_sock
*csk
)
779 log_debug(1 << CXGBI_DBG_SOCK
,
780 "csk 0x%p, state %u, flags 0x%lx, conn 0x%p.\n",
781 csk
, csk
->state
, csk
->flags
, csk
->user_data
);
783 if (csk
->state
!= CTP_ESTABLISHED
) {
784 read_lock_bh(&csk
->callback_lock
);
786 iscsi_conn_failure(csk
->user_data
,
787 ISCSI_ERR_CONN_FAILED
);
788 read_unlock_bh(&csk
->callback_lock
);
792 void cxgbi_sock_closed(struct cxgbi_sock
*csk
)
794 log_debug(1 << CXGBI_DBG_SOCK
, "csk 0x%p,%u,0x%lx,%u.\n",
795 csk
, (csk
)->state
, (csk
)->flags
, (csk
)->tid
);
796 cxgbi_sock_set_flag(csk
, CTPF_ACTIVE_CLOSE_NEEDED
);
797 if (csk
->state
== CTP_ACTIVE_OPEN
|| csk
->state
== CTP_CLOSED
)
799 if (csk
->saddr
.sin_port
)
802 dst_release(csk
->dst
);
803 csk
->cdev
->csk_release_offload_resources(csk
);
804 cxgbi_sock_set_state(csk
, CTP_CLOSED
);
805 cxgbi_inform_iscsi_conn_closing(csk
);
808 EXPORT_SYMBOL_GPL(cxgbi_sock_closed
);
810 static void need_active_close(struct cxgbi_sock
*csk
)
815 log_debug(1 << CXGBI_DBG_SOCK
, "csk 0x%p,%u,0x%lx,%u.\n",
816 csk
, (csk
)->state
, (csk
)->flags
, (csk
)->tid
);
817 spin_lock_bh(&csk
->lock
);
818 dst_confirm(csk
->dst
);
819 data_lost
= skb_queue_len(&csk
->receive_queue
);
820 __skb_queue_purge(&csk
->receive_queue
);
822 if (csk
->state
== CTP_ACTIVE_OPEN
)
823 cxgbi_sock_set_flag(csk
, CTPF_ACTIVE_CLOSE_NEEDED
);
824 else if (csk
->state
== CTP_ESTABLISHED
) {
826 cxgbi_sock_set_state(csk
, CTP_ACTIVE_CLOSE
);
827 } else if (csk
->state
== CTP_PASSIVE_CLOSE
) {
829 cxgbi_sock_set_state(csk
, CTP_CLOSE_WAIT_2
);
834 csk
->cdev
->csk_send_abort_req(csk
);
836 csk
->cdev
->csk_send_close_req(csk
);
839 spin_unlock_bh(&csk
->lock
);
842 void cxgbi_sock_fail_act_open(struct cxgbi_sock
*csk
, int errno
)
844 pr_info("csk 0x%p,%u,%lx, %pI4:%u-%pI4:%u, err %d.\n",
845 csk
, csk
->state
, csk
->flags
,
846 &csk
->saddr
.sin_addr
.s_addr
, csk
->saddr
.sin_port
,
847 &csk
->daddr
.sin_addr
.s_addr
, csk
->daddr
.sin_port
,
850 cxgbi_sock_set_state(csk
, CTP_CONNECTING
);
852 cxgbi_sock_closed(csk
);
854 EXPORT_SYMBOL_GPL(cxgbi_sock_fail_act_open
);
856 void cxgbi_sock_act_open_req_arp_failure(void *handle
, struct sk_buff
*skb
)
858 struct cxgbi_sock
*csk
= (struct cxgbi_sock
*)skb
->sk
;
860 log_debug(1 << CXGBI_DBG_SOCK
, "csk 0x%p,%u,0x%lx,%u.\n",
861 csk
, (csk
)->state
, (csk
)->flags
, (csk
)->tid
);
863 spin_lock_bh(&csk
->lock
);
864 if (csk
->state
== CTP_ACTIVE_OPEN
)
865 cxgbi_sock_fail_act_open(csk
, -EHOSTUNREACH
);
866 spin_unlock_bh(&csk
->lock
);
870 EXPORT_SYMBOL_GPL(cxgbi_sock_act_open_req_arp_failure
);
872 void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock
*csk
)
875 spin_lock_bh(&csk
->lock
);
876 if (cxgbi_sock_flag(csk
, CTPF_ABORT_RPL_PENDING
)) {
877 if (!cxgbi_sock_flag(csk
, CTPF_ABORT_RPL_RCVD
))
878 cxgbi_sock_set_flag(csk
, CTPF_ABORT_RPL_RCVD
);
880 cxgbi_sock_clear_flag(csk
, CTPF_ABORT_RPL_RCVD
);
881 cxgbi_sock_clear_flag(csk
, CTPF_ABORT_RPL_PENDING
);
882 if (cxgbi_sock_flag(csk
, CTPF_ABORT_REQ_RCVD
))
883 pr_err("csk 0x%p,%u,0x%lx,%u,ABT_RPL_RSS.\n",
884 csk
, csk
->state
, csk
->flags
, csk
->tid
);
885 cxgbi_sock_closed(csk
);
888 spin_unlock_bh(&csk
->lock
);
891 EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_abort_rpl
);
893 void cxgbi_sock_rcv_peer_close(struct cxgbi_sock
*csk
)
895 log_debug(1 << CXGBI_DBG_SOCK
, "csk 0x%p,%u,0x%lx,%u.\n",
896 csk
, (csk
)->state
, (csk
)->flags
, (csk
)->tid
);
898 spin_lock_bh(&csk
->lock
);
900 if (cxgbi_sock_flag(csk
, CTPF_ABORT_RPL_PENDING
))
903 switch (csk
->state
) {
904 case CTP_ESTABLISHED
:
905 cxgbi_sock_set_state(csk
, CTP_PASSIVE_CLOSE
);
907 case CTP_ACTIVE_CLOSE
:
908 cxgbi_sock_set_state(csk
, CTP_CLOSE_WAIT_2
);
910 case CTP_CLOSE_WAIT_1
:
911 cxgbi_sock_closed(csk
);
916 pr_err("csk 0x%p,%u,0x%lx,%u, bad state.\n",
917 csk
, csk
->state
, csk
->flags
, csk
->tid
);
919 cxgbi_inform_iscsi_conn_closing(csk
);
921 spin_unlock_bh(&csk
->lock
);
924 EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_peer_close
);
926 void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock
*csk
, u32 snd_nxt
)
928 log_debug(1 << CXGBI_DBG_SOCK
, "csk 0x%p,%u,0x%lx,%u.\n",
929 csk
, (csk
)->state
, (csk
)->flags
, (csk
)->tid
);
931 spin_lock_bh(&csk
->lock
);
933 csk
->snd_una
= snd_nxt
- 1;
934 if (cxgbi_sock_flag(csk
, CTPF_ABORT_RPL_PENDING
))
937 switch (csk
->state
) {
938 case CTP_ACTIVE_CLOSE
:
939 cxgbi_sock_set_state(csk
, CTP_CLOSE_WAIT_1
);
941 case CTP_CLOSE_WAIT_1
:
942 case CTP_CLOSE_WAIT_2
:
943 cxgbi_sock_closed(csk
);
948 pr_err("csk 0x%p,%u,0x%lx,%u, bad state.\n",
949 csk
, csk
->state
, csk
->flags
, csk
->tid
);
952 spin_unlock_bh(&csk
->lock
);
955 EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_close_conn_rpl
);
957 void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock
*csk
, unsigned int credits
,
958 unsigned int snd_una
, int seq_chk
)
960 log_debug(1 << CXGBI_DBG_TOE
| 1 << CXGBI_DBG_SOCK
,
961 "csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, snd_una %u,%d.\n",
962 csk
, csk
->state
, csk
->flags
, csk
->tid
, credits
,
963 csk
->wr_cred
, csk
->wr_una_cred
, snd_una
, seq_chk
);
965 spin_lock_bh(&csk
->lock
);
967 csk
->wr_cred
+= credits
;
968 if (csk
->wr_una_cred
> csk
->wr_max_cred
- csk
->wr_cred
)
969 csk
->wr_una_cred
= csk
->wr_max_cred
- csk
->wr_cred
;
972 struct sk_buff
*p
= cxgbi_sock_peek_wr(csk
);
975 pr_err("csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, empty.\n",
976 csk
, csk
->state
, csk
->flags
, csk
->tid
, credits
,
977 csk
->wr_cred
, csk
->wr_una_cred
);
981 if (unlikely(credits
< p
->csum
)) {
982 pr_warn("csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, < %u.\n",
983 csk
, csk
->state
, csk
->flags
, csk
->tid
,
984 credits
, csk
->wr_cred
, csk
->wr_una_cred
,
989 cxgbi_sock_dequeue_wr(csk
);
995 cxgbi_sock_check_wr_invariants(csk
);
998 if (unlikely(before(snd_una
, csk
->snd_una
))) {
999 pr_warn("csk 0x%p,%u,0x%lx,%u, snd_una %u/%u.",
1000 csk
, csk
->state
, csk
->flags
, csk
->tid
, snd_una
,
1005 if (csk
->snd_una
!= snd_una
) {
1006 csk
->snd_una
= snd_una
;
1007 dst_confirm(csk
->dst
);
1011 if (skb_queue_len(&csk
->write_queue
)) {
1012 if (csk
->cdev
->csk_push_tx_frames(csk
, 0))
1013 cxgbi_conn_tx_open(csk
);
1015 cxgbi_conn_tx_open(csk
);
1017 spin_unlock_bh(&csk
->lock
);
1019 EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_wr_ack
);
1021 static unsigned int cxgbi_sock_find_best_mtu(struct cxgbi_sock
*csk
,
1026 while (i
< csk
->cdev
->nmtus
- 1 && csk
->cdev
->mtus
[i
+ 1] <= mtu
)
1032 unsigned int cxgbi_sock_select_mss(struct cxgbi_sock
*csk
, unsigned int pmtu
)
1035 struct dst_entry
*dst
= csk
->dst
;
1037 csk
->advmss
= dst_metric_advmss(dst
);
1039 if (csk
->advmss
> pmtu
- 40)
1040 csk
->advmss
= pmtu
- 40;
1041 if (csk
->advmss
< csk
->cdev
->mtus
[0] - 40)
1042 csk
->advmss
= csk
->cdev
->mtus
[0] - 40;
1043 idx
= cxgbi_sock_find_best_mtu(csk
, csk
->advmss
+ 40);
1047 EXPORT_SYMBOL_GPL(cxgbi_sock_select_mss
);
1049 void cxgbi_sock_skb_entail(struct cxgbi_sock
*csk
, struct sk_buff
*skb
)
1051 cxgbi_skcb_tcp_seq(skb
) = csk
->write_seq
;
1052 __skb_queue_tail(&csk
->write_queue
, skb
);
1054 EXPORT_SYMBOL_GPL(cxgbi_sock_skb_entail
);
1056 void cxgbi_sock_purge_wr_queue(struct cxgbi_sock
*csk
)
1058 struct sk_buff
*skb
;
1060 while ((skb
= cxgbi_sock_dequeue_wr(csk
)) != NULL
)
1063 EXPORT_SYMBOL_GPL(cxgbi_sock_purge_wr_queue
);
1065 void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock
*csk
)
1067 int pending
= cxgbi_sock_count_pending_wrs(csk
);
1069 if (unlikely(csk
->wr_cred
+ pending
!= csk
->wr_max_cred
))
1070 pr_err("csk 0x%p, tid %u, credit %u + %u != %u.\n",
1071 csk
, csk
->tid
, csk
->wr_cred
, pending
, csk
->wr_max_cred
);
1073 EXPORT_SYMBOL_GPL(cxgbi_sock_check_wr_invariants
);
1075 static int cxgbi_sock_send_pdus(struct cxgbi_sock
*csk
, struct sk_buff
*skb
)
1077 struct cxgbi_device
*cdev
= csk
->cdev
;
1078 struct sk_buff
*next
;
1079 int err
, copied
= 0;
1081 spin_lock_bh(&csk
->lock
);
1083 if (csk
->state
!= CTP_ESTABLISHED
) {
1084 log_debug(1 << CXGBI_DBG_PDU_TX
,
1085 "csk 0x%p,%u,0x%lx,%u, EAGAIN.\n",
1086 csk
, csk
->state
, csk
->flags
, csk
->tid
);
1092 log_debug(1 << CXGBI_DBG_PDU_TX
,
1093 "csk 0x%p,%u,0x%lx,%u, EPIPE %d.\n",
1094 csk
, csk
->state
, csk
->flags
, csk
->tid
, csk
->err
);
1099 if (csk
->write_seq
- csk
->snd_una
>= cdev
->snd_win
) {
1100 log_debug(1 << CXGBI_DBG_PDU_TX
,
1101 "csk 0x%p,%u,0x%lx,%u, FULL %u-%u >= %u.\n",
1102 csk
, csk
->state
, csk
->flags
, csk
->tid
, csk
->write_seq
,
1103 csk
->snd_una
, cdev
->snd_win
);
1109 int frags
= skb_shinfo(skb
)->nr_frags
+
1110 (skb
->len
!= skb
->data_len
);
1112 if (unlikely(skb_headroom(skb
) < cdev
->skb_tx_rsvd
)) {
1113 pr_err("csk 0x%p, skb head %u < %u.\n",
1114 csk
, skb_headroom(skb
), cdev
->skb_tx_rsvd
);
1119 if (frags
>= SKB_WR_LIST_SIZE
) {
1120 pr_err("csk 0x%p, frags %d, %u,%u >%u.\n",
1121 csk
, skb_shinfo(skb
)->nr_frags
, skb
->len
,
1122 skb
->data_len
, (uint
)(SKB_WR_LIST_SIZE
));
1129 cxgbi_skcb_set_flag(skb
, SKCBF_TX_NEED_HDR
);
1130 cxgbi_sock_skb_entail(csk
, skb
);
1132 csk
->write_seq
+= skb
->len
+
1133 cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb
));
1137 if (likely(skb_queue_len(&csk
->write_queue
)))
1138 cdev
->csk_push_tx_frames(csk
, 1);
1139 spin_unlock_bh(&csk
->lock
);
1143 if (copied
== 0 && err
== -EPIPE
)
1144 copied
= csk
->err
? csk
->err
: -EPIPE
;
1151 * Direct Data Placement -
1152 * Directly place the iSCSI Data-In or Data-Out PDU's payload into pre-posted
1153 * final destination host-memory buffers based on the Initiator Task Tag (ITT)
1154 * in Data-In or Target Task Tag (TTT) in Data-Out PDUs.
1155 * The host memory address is programmed into h/w in the format of pagepod
1157 * The location of the pagepod entry is encoded into ddp tag which is used as
1158 * the base for ITT/TTT.
1161 static unsigned char ddp_page_order
[DDP_PGIDX_MAX
] = {0, 1, 2, 4};
1162 static unsigned char ddp_page_shift
[DDP_PGIDX_MAX
] = {12, 13, 14, 16};
1163 static unsigned char page_idx
= DDP_PGIDX_MAX
;
1165 static unsigned char sw_tag_idx_bits
;
1166 static unsigned char sw_tag_age_bits
;
1169 * Direct-Data Placement page size adjustment
1171 static int ddp_adjust_page_table(void)
1174 unsigned int base_order
, order
;
1176 if (PAGE_SIZE
< (1UL << ddp_page_shift
[0])) {
1177 pr_info("PAGE_SIZE 0x%lx too small, min 0x%lx\n",
1178 PAGE_SIZE
, 1UL << ddp_page_shift
[0]);
1182 base_order
= get_order(1UL << ddp_page_shift
[0]);
1183 order
= get_order(1UL << PAGE_SHIFT
);
1185 for (i
= 0; i
< DDP_PGIDX_MAX
; i
++) {
1186 /* first is the kernel page size, then just doubling */
1187 ddp_page_order
[i
] = order
- base_order
+ i
;
1188 ddp_page_shift
[i
] = PAGE_SHIFT
+ i
;
1193 static int ddp_find_page_index(unsigned long pgsz
)
1197 for (i
= 0; i
< DDP_PGIDX_MAX
; i
++) {
1198 if (pgsz
== (1UL << ddp_page_shift
[i
]))
1201 pr_info("ddp page size %lu not supported.\n", pgsz
);
1202 return DDP_PGIDX_MAX
;
1205 static void ddp_setup_host_page_size(void)
1207 if (page_idx
== DDP_PGIDX_MAX
) {
1208 page_idx
= ddp_find_page_index(PAGE_SIZE
);
1210 if (page_idx
== DDP_PGIDX_MAX
) {
1211 pr_info("system PAGE %lu, update hw.\n", PAGE_SIZE
);
1212 if (ddp_adjust_page_table() < 0) {
1213 pr_info("PAGE %lu, disable ddp.\n", PAGE_SIZE
);
1216 page_idx
= ddp_find_page_index(PAGE_SIZE
);
1218 pr_info("system PAGE %lu, ddp idx %u.\n", PAGE_SIZE
, page_idx
);
1222 void cxgbi_ddp_page_size_factor(int *pgsz_factor
)
1226 for (i
= 0; i
< DDP_PGIDX_MAX
; i
++)
1227 pgsz_factor
[i
] = ddp_page_order
[i
];
1229 EXPORT_SYMBOL_GPL(cxgbi_ddp_page_size_factor
);
1232 * DDP setup & teardown
1235 void cxgbi_ddp_ppod_set(struct cxgbi_pagepod
*ppod
,
1236 struct cxgbi_pagepod_hdr
*hdr
,
1237 struct cxgbi_gather_list
*gl
, unsigned int gidx
)
1241 memcpy(ppod
, hdr
, sizeof(*hdr
));
1242 for (i
= 0; i
< (PPOD_PAGES_MAX
+ 1); i
++, gidx
++) {
1243 ppod
->addr
[i
] = gidx
< gl
->nelem
?
1244 cpu_to_be64(gl
->phys_addr
[gidx
]) : 0ULL;
1247 EXPORT_SYMBOL_GPL(cxgbi_ddp_ppod_set
);
1249 void cxgbi_ddp_ppod_clear(struct cxgbi_pagepod
*ppod
)
1251 memset(ppod
, 0, sizeof(*ppod
));
1253 EXPORT_SYMBOL_GPL(cxgbi_ddp_ppod_clear
);
1255 static inline int ddp_find_unused_entries(struct cxgbi_ddp_info
*ddp
,
1256 unsigned int start
, unsigned int max
,
1258 struct cxgbi_gather_list
*gl
)
1260 unsigned int i
, j
, k
;
1262 /* not enough entries */
1263 if ((max
- start
) < count
) {
1264 log_debug(1 << CXGBI_DBG_DDP
,
1265 "NOT enough entries %u+%u < %u.\n", start
, count
, max
);
1270 spin_lock(&ddp
->map_lock
);
1271 for (i
= start
; i
< max
;) {
1272 for (j
= 0, k
= i
; j
< count
; j
++, k
++) {
1277 for (j
= 0, k
= i
; j
< count
; j
++, k
++)
1278 ddp
->gl_map
[k
] = gl
;
1279 spin_unlock(&ddp
->map_lock
);
1284 spin_unlock(&ddp
->map_lock
);
1285 log_debug(1 << CXGBI_DBG_DDP
,
1286 "NO suitable entries %u available.\n", count
);
1290 static inline void ddp_unmark_entries(struct cxgbi_ddp_info
*ddp
,
1291 int start
, int count
)
1293 spin_lock(&ddp
->map_lock
);
1294 memset(&ddp
->gl_map
[start
], 0,
1295 count
* sizeof(struct cxgbi_gather_list
*));
1296 spin_unlock(&ddp
->map_lock
);
1299 static inline void ddp_gl_unmap(struct pci_dev
*pdev
,
1300 struct cxgbi_gather_list
*gl
)
1304 for (i
= 0; i
< gl
->nelem
; i
++)
1305 dma_unmap_page(&pdev
->dev
, gl
->phys_addr
[i
], PAGE_SIZE
,
1306 PCI_DMA_FROMDEVICE
);
1309 static inline int ddp_gl_map(struct pci_dev
*pdev
,
1310 struct cxgbi_gather_list
*gl
)
1314 for (i
= 0; i
< gl
->nelem
; i
++) {
1315 gl
->phys_addr
[i
] = dma_map_page(&pdev
->dev
, gl
->pages
[i
], 0,
1317 PCI_DMA_FROMDEVICE
);
1318 if (unlikely(dma_mapping_error(&pdev
->dev
, gl
->phys_addr
[i
]))) {
1319 log_debug(1 << CXGBI_DBG_DDP
,
1320 "page %d 0x%p, 0x%p dma mapping err.\n",
1321 i
, gl
->pages
[i
], pdev
);
1328 unsigned int nelem
= gl
->nelem
;
1331 ddp_gl_unmap(pdev
, gl
);
1337 static void ddp_release_gl(struct cxgbi_gather_list
*gl
,
1338 struct pci_dev
*pdev
)
1340 ddp_gl_unmap(pdev
, gl
);
1344 static struct cxgbi_gather_list
*ddp_make_gl(unsigned int xferlen
,
1345 struct scatterlist
*sgl
,
1347 struct pci_dev
*pdev
,
1350 struct cxgbi_gather_list
*gl
;
1351 struct scatterlist
*sg
= sgl
;
1352 struct page
*sgpage
= sg_page(sg
);
1353 unsigned int sglen
= sg
->length
;
1354 unsigned int sgoffset
= sg
->offset
;
1355 unsigned int npages
= (xferlen
+ sgoffset
+ PAGE_SIZE
- 1) >>
1359 if (xferlen
< DDP_THRESHOLD
) {
1360 log_debug(1 << CXGBI_DBG_DDP
,
1361 "xfer %u < threshold %u, no ddp.\n",
1362 xferlen
, DDP_THRESHOLD
);
1366 gl
= kzalloc(sizeof(struct cxgbi_gather_list
) +
1367 npages
* (sizeof(dma_addr_t
) +
1368 sizeof(struct page
*)), gfp
);
1370 log_debug(1 << CXGBI_DBG_DDP
,
1371 "xfer %u, %u pages, OOM.\n", xferlen
, npages
);
1375 log_debug(1 << CXGBI_DBG_DDP
,
1376 "xfer %u, sgl %u, gl max %u.\n", xferlen
, sgcnt
, npages
);
1378 gl
->pages
= (struct page
**)&gl
->phys_addr
[npages
];
1380 gl
->length
= xferlen
;
1381 gl
->offset
= sgoffset
;
1382 gl
->pages
[0] = sgpage
;
1384 for (i
= 1, sg
= sg_next(sgl
), j
= 0; i
< sgcnt
;
1385 i
++, sg
= sg_next(sg
)) {
1386 struct page
*page
= sg_page(sg
);
1388 if (sgpage
== page
&& sg
->offset
== sgoffset
+ sglen
)
1389 sglen
+= sg
->length
;
1391 /* make sure the sgl is fit for ddp:
1392 * each has the same page size, and
1393 * all of the middle pages are used completely
1395 if ((j
&& sgoffset
) || ((i
!= sgcnt
- 1) &&
1396 ((sglen
+ sgoffset
) & ~PAGE_MASK
))) {
1397 log_debug(1 << CXGBI_DBG_DDP
,
1398 "page %d/%u, %u + %u.\n",
1399 i
, sgcnt
, sgoffset
, sglen
);
1404 if (j
== gl
->nelem
|| sg
->offset
) {
1405 log_debug(1 << CXGBI_DBG_DDP
,
1406 "page %d/%u, offset %u.\n",
1407 j
, gl
->nelem
, sg
->offset
);
1410 gl
->pages
[j
] = page
;
1412 sgoffset
= sg
->offset
;
1418 if (ddp_gl_map(pdev
, gl
) < 0)
1428 static void ddp_tag_release(struct cxgbi_hba
*chba
, u32 tag
)
1430 struct cxgbi_device
*cdev
= chba
->cdev
;
1431 struct cxgbi_ddp_info
*ddp
= cdev
->ddp
;
1434 idx
= (tag
>> PPOD_IDX_SHIFT
) & ddp
->idx_mask
;
1435 if (idx
< ddp
->nppods
) {
1436 struct cxgbi_gather_list
*gl
= ddp
->gl_map
[idx
];
1439 if (!gl
|| !gl
->nelem
) {
1440 pr_warn("tag 0x%x, idx %u, gl 0x%p, %u.\n",
1441 tag
, idx
, gl
, gl
? gl
->nelem
: 0);
1444 npods
= (gl
->nelem
+ PPOD_PAGES_MAX
- 1) >> PPOD_PAGES_SHIFT
;
1445 log_debug(1 << CXGBI_DBG_DDP
,
1446 "tag 0x%x, release idx %u, npods %u.\n",
1448 cdev
->csk_ddp_clear(chba
, tag
, idx
, npods
);
1449 ddp_unmark_entries(ddp
, idx
, npods
);
1450 ddp_release_gl(gl
, ddp
->pdev
);
1452 pr_warn("tag 0x%x, idx %u > max %u.\n", tag
, idx
, ddp
->nppods
);
1455 static int ddp_tag_reserve(struct cxgbi_sock
*csk
, unsigned int tid
,
1456 u32 sw_tag
, u32
*tagp
, struct cxgbi_gather_list
*gl
,
1459 struct cxgbi_device
*cdev
= csk
->cdev
;
1460 struct cxgbi_ddp_info
*ddp
= cdev
->ddp
;
1461 struct cxgbi_tag_format
*tformat
= &cdev
->tag_format
;
1462 struct cxgbi_pagepod_hdr hdr
;
1468 npods
= (gl
->nelem
+ PPOD_PAGES_MAX
- 1) >> PPOD_PAGES_SHIFT
;
1469 if (ddp
->idx_last
== ddp
->nppods
)
1470 idx
= ddp_find_unused_entries(ddp
, 0, ddp
->nppods
,
1473 idx
= ddp_find_unused_entries(ddp
, ddp
->idx_last
+ 1,
1476 if (idx
< 0 && ddp
->idx_last
>= npods
) {
1477 idx
= ddp_find_unused_entries(ddp
, 0,
1478 min(ddp
->idx_last
+ npods
, ddp
->nppods
),
1483 log_debug(1 << CXGBI_DBG_DDP
,
1484 "xferlen %u, gl %u, npods %u NO DDP.\n",
1485 gl
->length
, gl
->nelem
, npods
);
1489 tag
= cxgbi_ddp_tag_base(tformat
, sw_tag
);
1490 tag
|= idx
<< PPOD_IDX_SHIFT
;
1493 hdr
.vld_tid
= htonl(PPOD_VALID_FLAG
| PPOD_TID(tid
));
1494 hdr
.pgsz_tag_clr
= htonl(tag
& ddp
->rsvd_tag_mask
);
1495 hdr
.max_offset
= htonl(gl
->length
);
1496 hdr
.page_offset
= htonl(gl
->offset
);
1498 err
= cdev
->csk_ddp_set(csk
, &hdr
, idx
, npods
, gl
);
1500 goto unmark_entries
;
1502 ddp
->idx_last
= idx
;
1503 log_debug(1 << CXGBI_DBG_DDP
,
1504 "xfer %u, gl %u,%u, tid 0x%x, tag 0x%x->0x%x(%u,%u).\n",
1505 gl
->length
, gl
->nelem
, gl
->offset
, tid
, sw_tag
, tag
, idx
,
1511 ddp_unmark_entries(ddp
, idx
, npods
);
1515 int cxgbi_ddp_reserve(struct cxgbi_sock
*csk
, unsigned int *tagp
,
1516 unsigned int sw_tag
, unsigned int xferlen
,
1517 struct scatterlist
*sgl
, unsigned int sgcnt
, gfp_t gfp
)
1519 struct cxgbi_device
*cdev
= csk
->cdev
;
1520 struct cxgbi_tag_format
*tformat
= &cdev
->tag_format
;
1521 struct cxgbi_gather_list
*gl
;
1524 if (page_idx
>= DDP_PGIDX_MAX
|| !cdev
->ddp
||
1525 xferlen
< DDP_THRESHOLD
) {
1526 log_debug(1 << CXGBI_DBG_DDP
,
1527 "pgidx %u, xfer %u, NO ddp.\n", page_idx
, xferlen
);
1531 if (!cxgbi_sw_tag_usable(tformat
, sw_tag
)) {
1532 log_debug(1 << CXGBI_DBG_DDP
,
1533 "sw_tag 0x%x NOT usable.\n", sw_tag
);
1537 gl
= ddp_make_gl(xferlen
, sgl
, sgcnt
, cdev
->pdev
, gfp
);
1541 err
= ddp_tag_reserve(csk
, csk
->tid
, sw_tag
, tagp
, gl
, gfp
);
1543 ddp_release_gl(gl
, cdev
->pdev
);
1548 static void ddp_destroy(struct kref
*kref
)
1550 struct cxgbi_ddp_info
*ddp
= container_of(kref
,
1551 struct cxgbi_ddp_info
,
1553 struct cxgbi_device
*cdev
= ddp
->cdev
;
1556 pr_info("kref 0, destroy ddp 0x%p, cdev 0x%p.\n", ddp
, cdev
);
1558 while (i
< ddp
->nppods
) {
1559 struct cxgbi_gather_list
*gl
= ddp
->gl_map
[i
];
1562 int npods
= (gl
->nelem
+ PPOD_PAGES_MAX
- 1)
1563 >> PPOD_PAGES_SHIFT
;
1564 pr_info("cdev 0x%p, ddp %d + %d.\n", cdev
, i
, npods
);
1570 cxgbi_free_big_mem(ddp
);
1573 int cxgbi_ddp_cleanup(struct cxgbi_device
*cdev
)
1575 struct cxgbi_ddp_info
*ddp
= cdev
->ddp
;
1577 log_debug(1 << CXGBI_DBG_DDP
,
1578 "cdev 0x%p, release ddp 0x%p.\n", cdev
, ddp
);
1581 return kref_put(&ddp
->refcnt
, ddp_destroy
);
1584 EXPORT_SYMBOL_GPL(cxgbi_ddp_cleanup
);
1586 int cxgbi_ddp_init(struct cxgbi_device
*cdev
,
1587 unsigned int llimit
, unsigned int ulimit
,
1588 unsigned int max_txsz
, unsigned int max_rxsz
)
1590 struct cxgbi_ddp_info
*ddp
;
1591 unsigned int ppmax
, bits
;
1593 ppmax
= (ulimit
- llimit
+ 1) >> PPOD_SIZE_SHIFT
;
1594 bits
= __ilog2_u32(ppmax
) + 1;
1595 if (bits
> PPOD_IDX_MAX_SIZE
)
1596 bits
= PPOD_IDX_MAX_SIZE
;
1597 ppmax
= (1 << (bits
- 1)) - 1;
1599 ddp
= cxgbi_alloc_big_mem(sizeof(struct cxgbi_ddp_info
) +
1600 ppmax
* (sizeof(struct cxgbi_gather_list
*) +
1601 sizeof(struct sk_buff
*)),
1604 pr_warn("cdev 0x%p, ddp ppmax %u OOM.\n", cdev
, ppmax
);
1607 ddp
->gl_map
= (struct cxgbi_gather_list
**)(ddp
+ 1);
1610 spin_lock_init(&ddp
->map_lock
);
1611 kref_init(&ddp
->refcnt
);
1614 ddp
->pdev
= cdev
->pdev
;
1615 ddp
->llimit
= llimit
;
1616 ddp
->ulimit
= ulimit
;
1617 ddp
->max_txsz
= min_t(unsigned int, max_txsz
, ULP2_MAX_PKT_SIZE
);
1618 ddp
->max_rxsz
= min_t(unsigned int, max_rxsz
, ULP2_MAX_PKT_SIZE
);
1619 ddp
->nppods
= ppmax
;
1620 ddp
->idx_last
= ppmax
;
1621 ddp
->idx_bits
= bits
;
1622 ddp
->idx_mask
= (1 << bits
) - 1;
1623 ddp
->rsvd_tag_mask
= (1 << (bits
+ PPOD_IDX_SHIFT
)) - 1;
1625 cdev
->tag_format
.sw_bits
= sw_tag_idx_bits
+ sw_tag_age_bits
;
1626 cdev
->tag_format
.rsvd_bits
= ddp
->idx_bits
;
1627 cdev
->tag_format
.rsvd_shift
= PPOD_IDX_SHIFT
;
1628 cdev
->tag_format
.rsvd_mask
= (1 << cdev
->tag_format
.rsvd_bits
) - 1;
1630 pr_info("%s tag format, sw %u, rsvd %u,%u, mask 0x%x.\n",
1631 cdev
->ports
[0]->name
, cdev
->tag_format
.sw_bits
,
1632 cdev
->tag_format
.rsvd_bits
, cdev
->tag_format
.rsvd_shift
,
1633 cdev
->tag_format
.rsvd_mask
);
1635 cdev
->tx_max_size
= min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD
,
1636 ddp
->max_txsz
- ISCSI_PDU_NONPAYLOAD_LEN
);
1637 cdev
->rx_max_size
= min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD
,
1638 ddp
->max_rxsz
- ISCSI_PDU_NONPAYLOAD_LEN
);
1640 log_debug(1 << CXGBI_DBG_DDP
,
1641 "%s max payload size: %u/%u, %u/%u.\n",
1642 cdev
->ports
[0]->name
, cdev
->tx_max_size
, ddp
->max_txsz
,
1643 cdev
->rx_max_size
, ddp
->max_rxsz
);
1646 EXPORT_SYMBOL_GPL(cxgbi_ddp_init
);
1649 * APIs interacting with open-iscsi libraries
1652 static unsigned char padding
[4];
1654 static void task_release_itt(struct iscsi_task
*task
, itt_t hdr_itt
)
1656 struct scsi_cmnd
*sc
= task
->sc
;
1657 struct iscsi_tcp_conn
*tcp_conn
= task
->conn
->dd_data
;
1658 struct cxgbi_conn
*cconn
= tcp_conn
->dd_data
;
1659 struct cxgbi_hba
*chba
= cconn
->chba
;
1660 struct cxgbi_tag_format
*tformat
= &chba
->cdev
->tag_format
;
1661 u32 tag
= ntohl((__force u32
)hdr_itt
);
1663 log_debug(1 << CXGBI_DBG_DDP
,
1664 "cdev 0x%p, release tag 0x%x.\n", chba
->cdev
, tag
);
1666 (scsi_bidi_cmnd(sc
) || sc
->sc_data_direction
== DMA_FROM_DEVICE
) &&
1667 cxgbi_is_ddp_tag(tformat
, tag
))
1668 ddp_tag_release(chba
, tag
);
1671 static int task_reserve_itt(struct iscsi_task
*task
, itt_t
*hdr_itt
)
1673 struct scsi_cmnd
*sc
= task
->sc
;
1674 struct iscsi_conn
*conn
= task
->conn
;
1675 struct iscsi_session
*sess
= conn
->session
;
1676 struct iscsi_tcp_conn
*tcp_conn
= conn
->dd_data
;
1677 struct cxgbi_conn
*cconn
= tcp_conn
->dd_data
;
1678 struct cxgbi_hba
*chba
= cconn
->chba
;
1679 struct cxgbi_tag_format
*tformat
= &chba
->cdev
->tag_format
;
1680 u32 sw_tag
= (sess
->age
<< cconn
->task_idx_bits
) | task
->itt
;
1685 (scsi_bidi_cmnd(sc
) || sc
->sc_data_direction
== DMA_FROM_DEVICE
)) {
1686 err
= cxgbi_ddp_reserve(cconn
->cep
->csk
, &tag
, sw_tag
,
1687 scsi_in(sc
)->length
,
1688 scsi_in(sc
)->table
.sgl
,
1689 scsi_in(sc
)->table
.nents
,
1692 log_debug(1 << CXGBI_DBG_DDP
,
1693 "csk 0x%p, R task 0x%p, %u,%u, no ddp.\n",
1694 cconn
->cep
->csk
, task
, scsi_in(sc
)->length
,
1695 scsi_in(sc
)->table
.nents
);
1699 tag
= cxgbi_set_non_ddp_tag(tformat
, sw_tag
);
1700 /* the itt need to sent in big-endian order */
1701 *hdr_itt
= (__force itt_t
)htonl(tag
);
1703 log_debug(1 << CXGBI_DBG_DDP
,
1704 "cdev 0x%p, task 0x%p, 0x%x(0x%x,0x%x)->0x%x/0x%x.\n",
1705 chba
->cdev
, task
, sw_tag
, task
->itt
, sess
->age
, tag
, *hdr_itt
);
1709 void cxgbi_parse_pdu_itt(struct iscsi_conn
*conn
, itt_t itt
, int *idx
, int *age
)
1711 struct iscsi_tcp_conn
*tcp_conn
= conn
->dd_data
;
1712 struct cxgbi_conn
*cconn
= tcp_conn
->dd_data
;
1713 struct cxgbi_device
*cdev
= cconn
->chba
->cdev
;
1714 u32 tag
= ntohl((__force u32
) itt
);
1717 sw_bits
= cxgbi_tag_nonrsvd_bits(&cdev
->tag_format
, tag
);
1719 *idx
= sw_bits
& ((1 << cconn
->task_idx_bits
) - 1);
1721 *age
= (sw_bits
>> cconn
->task_idx_bits
) & ISCSI_AGE_MASK
;
1723 log_debug(1 << CXGBI_DBG_DDP
,
1724 "cdev 0x%p, tag 0x%x/0x%x, -> 0x%x(0x%x,0x%x).\n",
1725 cdev
, tag
, itt
, sw_bits
, idx
? *idx
: 0xFFFFF,
1728 EXPORT_SYMBOL_GPL(cxgbi_parse_pdu_itt
);
1730 void cxgbi_conn_tx_open(struct cxgbi_sock
*csk
)
1732 struct iscsi_conn
*conn
= csk
->user_data
;
1735 log_debug(1 << CXGBI_DBG_SOCK
,
1736 "csk 0x%p, cid %d.\n", csk
, conn
->id
);
1737 iscsi_conn_queue_work(conn
);
1740 EXPORT_SYMBOL_GPL(cxgbi_conn_tx_open
);
1743 * pdu receive, interact with libiscsi_tcp
1745 static inline int read_pdu_skb(struct iscsi_conn
*conn
,
1746 struct sk_buff
*skb
,
1747 unsigned int offset
,
1753 bytes_read
= iscsi_tcp_recv_skb(conn
, skb
, offset
, offloaded
, &status
);
1755 case ISCSI_TCP_CONN_ERR
:
1756 pr_info("skb 0x%p, off %u, %d, TCP_ERR.\n",
1757 skb
, offset
, offloaded
);
1759 case ISCSI_TCP_SUSPENDED
:
1760 log_debug(1 << CXGBI_DBG_PDU_RX
,
1761 "skb 0x%p, off %u, %d, TCP_SUSPEND, rc %d.\n",
1762 skb
, offset
, offloaded
, bytes_read
);
1763 /* no transfer - just have caller flush queue */
1765 case ISCSI_TCP_SKB_DONE
:
1766 pr_info("skb 0x%p, off %u, %d, TCP_SKB_DONE.\n",
1767 skb
, offset
, offloaded
);
1769 * pdus should always fit in the skb and we should get
1770 * segment done notifcation.
1772 iscsi_conn_printk(KERN_ERR
, conn
, "Invalid pdu or skb.");
1774 case ISCSI_TCP_SEGMENT_DONE
:
1775 log_debug(1 << CXGBI_DBG_PDU_RX
,
1776 "skb 0x%p, off %u, %d, TCP_SEG_DONE, rc %d.\n",
1777 skb
, offset
, offloaded
, bytes_read
);
1780 pr_info("skb 0x%p, off %u, %d, invalid status %d.\n",
1781 skb
, offset
, offloaded
, status
);
1786 static int skb_read_pdu_bhs(struct iscsi_conn
*conn
, struct sk_buff
*skb
)
1788 struct iscsi_tcp_conn
*tcp_conn
= conn
->dd_data
;
1790 log_debug(1 << CXGBI_DBG_PDU_RX
,
1791 "conn 0x%p, skb 0x%p, len %u, flag 0x%lx.\n",
1792 conn
, skb
, skb
->len
, cxgbi_skcb_flags(skb
));
1794 if (!iscsi_tcp_recv_segment_is_hdr(tcp_conn
)) {
1795 pr_info("conn 0x%p, skb 0x%p, not hdr.\n", conn
, skb
);
1796 iscsi_conn_failure(conn
, ISCSI_ERR_PROTO
);
1800 if (conn
->hdrdgst_en
&&
1801 cxgbi_skcb_test_flag(skb
, SKCBF_RX_HCRC_ERR
)) {
1802 pr_info("conn 0x%p, skb 0x%p, hcrc.\n", conn
, skb
);
1803 iscsi_conn_failure(conn
, ISCSI_ERR_HDR_DGST
);
1807 return read_pdu_skb(conn
, skb
, 0, 0);
1810 static int skb_read_pdu_data(struct iscsi_conn
*conn
, struct sk_buff
*lskb
,
1811 struct sk_buff
*skb
, unsigned int offset
)
1813 struct iscsi_tcp_conn
*tcp_conn
= conn
->dd_data
;
1815 int opcode
= tcp_conn
->in
.hdr
->opcode
& ISCSI_OPCODE_MASK
;
1817 log_debug(1 << CXGBI_DBG_PDU_RX
,
1818 "conn 0x%p, skb 0x%p, len %u, flag 0x%lx.\n",
1819 conn
, skb
, skb
->len
, cxgbi_skcb_flags(skb
));
1821 if (conn
->datadgst_en
&&
1822 cxgbi_skcb_test_flag(lskb
, SKCBF_RX_DCRC_ERR
)) {
1823 pr_info("conn 0x%p, skb 0x%p, dcrc 0x%lx.\n",
1824 conn
, lskb
, cxgbi_skcb_flags(lskb
));
1825 iscsi_conn_failure(conn
, ISCSI_ERR_DATA_DGST
);
1829 if (iscsi_tcp_recv_segment_is_hdr(tcp_conn
))
1832 /* coalesced, add header digest length */
1833 if (lskb
== skb
&& conn
->hdrdgst_en
)
1834 offset
+= ISCSI_DIGEST_SIZE
;
1836 if (cxgbi_skcb_test_flag(lskb
, SKCBF_RX_DATA_DDPD
))
1839 if (opcode
== ISCSI_OP_SCSI_DATA_IN
)
1840 log_debug(1 << CXGBI_DBG_PDU_RX
,
1841 "skb 0x%p, op 0x%x, itt 0x%x, %u %s ddp'ed.\n",
1842 skb
, opcode
, ntohl(tcp_conn
->in
.hdr
->itt
),
1843 tcp_conn
->in
.datalen
, offloaded
? "is" : "not");
1845 return read_pdu_skb(conn
, skb
, offset
, offloaded
);
1848 static void csk_return_rx_credits(struct cxgbi_sock
*csk
, int copied
)
1850 struct cxgbi_device
*cdev
= csk
->cdev
;
1854 log_debug(1 << CXGBI_DBG_PDU_RX
,
1855 "csk 0x%p,%u,0x%lx,%u, seq %u, wup %u, thre %u, %u.\n",
1856 csk
, csk
->state
, csk
->flags
, csk
->tid
, csk
->copied_seq
,
1857 csk
->rcv_wup
, cdev
->rx_credit_thres
,
1860 if (csk
->state
!= CTP_ESTABLISHED
)
1863 credits
= csk
->copied_seq
- csk
->rcv_wup
;
1864 if (unlikely(!credits
))
1866 if (unlikely(cdev
->rx_credit_thres
== 0))
1869 must_send
= credits
+ 16384 >= cdev
->rcv_win
;
1870 if (must_send
|| credits
>= cdev
->rx_credit_thres
)
1871 csk
->rcv_wup
+= cdev
->csk_send_rx_credits(csk
, credits
);
1874 void cxgbi_conn_pdu_ready(struct cxgbi_sock
*csk
)
1876 struct cxgbi_device
*cdev
= csk
->cdev
;
1877 struct iscsi_conn
*conn
= csk
->user_data
;
1878 struct sk_buff
*skb
;
1879 unsigned int read
= 0;
1882 log_debug(1 << CXGBI_DBG_PDU_RX
,
1883 "csk 0x%p, conn 0x%p.\n", csk
, conn
);
1885 if (unlikely(!conn
|| conn
->suspend_rx
)) {
1886 log_debug(1 << CXGBI_DBG_PDU_RX
,
1887 "csk 0x%p, conn 0x%p, id %d, suspend_rx %lu!\n",
1888 csk
, conn
, conn
? conn
->id
: 0xFF,
1889 conn
? conn
->suspend_rx
: 0xFF);
1894 skb
= skb_peek(&csk
->receive_queue
);
1896 !(cxgbi_skcb_test_flag(skb
, SKCBF_RX_STATUS
))) {
1898 log_debug(1 << CXGBI_DBG_PDU_RX
,
1899 "skb 0x%p, NOT ready 0x%lx.\n",
1900 skb
, cxgbi_skcb_flags(skb
));
1903 __skb_unlink(skb
, &csk
->receive_queue
);
1905 read
+= cxgbi_skcb_rx_pdulen(skb
);
1906 log_debug(1 << CXGBI_DBG_PDU_RX
,
1907 "csk 0x%p, skb 0x%p,%u,f 0x%lx, pdu len %u.\n",
1908 csk
, skb
, skb
->len
, cxgbi_skcb_flags(skb
),
1909 cxgbi_skcb_rx_pdulen(skb
));
1911 if (cxgbi_skcb_test_flag(skb
, SKCBF_RX_COALESCED
)) {
1912 err
= skb_read_pdu_bhs(conn
, skb
);
1914 pr_err("coalesced bhs, csk 0x%p, skb 0x%p,%u, "
1915 "f 0x%lx, plen %u.\n",
1917 cxgbi_skcb_flags(skb
),
1918 cxgbi_skcb_rx_pdulen(skb
));
1921 err
= skb_read_pdu_data(conn
, skb
, skb
,
1922 err
+ cdev
->skb_rx_extra
);
1924 pr_err("coalesced data, csk 0x%p, skb 0x%p,%u, "
1925 "f 0x%lx, plen %u.\n",
1927 cxgbi_skcb_flags(skb
),
1928 cxgbi_skcb_rx_pdulen(skb
));
1930 err
= skb_read_pdu_bhs(conn
, skb
);
1932 pr_err("bhs, csk 0x%p, skb 0x%p,%u, "
1933 "f 0x%lx, plen %u.\n",
1935 cxgbi_skcb_flags(skb
),
1936 cxgbi_skcb_rx_pdulen(skb
));
1940 if (cxgbi_skcb_test_flag(skb
, SKCBF_RX_DATA
)) {
1941 struct sk_buff
*dskb
;
1943 dskb
= skb_peek(&csk
->receive_queue
);
1945 pr_err("csk 0x%p, skb 0x%p,%u, f 0x%lx,"
1946 " plen %u, NO data.\n",
1948 cxgbi_skcb_flags(skb
),
1949 cxgbi_skcb_rx_pdulen(skb
));
1953 __skb_unlink(dskb
, &csk
->receive_queue
);
1955 err
= skb_read_pdu_data(conn
, skb
, dskb
, 0);
1957 pr_err("data, csk 0x%p, skb 0x%p,%u, "
1958 "f 0x%lx, plen %u, dskb 0x%p,"
1961 cxgbi_skcb_flags(skb
),
1962 cxgbi_skcb_rx_pdulen(skb
),
1966 err
= skb_read_pdu_data(conn
, skb
, skb
, 0);
1975 log_debug(1 << CXGBI_DBG_PDU_RX
, "csk 0x%p, read %u.\n", csk
, read
);
1977 csk
->copied_seq
+= read
;
1978 csk_return_rx_credits(csk
, read
);
1979 conn
->rxdata_octets
+= read
;
1983 pr_info("csk 0x%p, 0x%p, rx failed %d, read %u.\n",
1984 csk
, conn
, err
, read
);
1985 iscsi_conn_failure(conn
, ISCSI_ERR_CONN_FAILED
);
1988 EXPORT_SYMBOL_GPL(cxgbi_conn_pdu_ready
);
1990 static int sgl_seek_offset(struct scatterlist
*sgl
, unsigned int sgcnt
,
1991 unsigned int offset
, unsigned int *off
,
1992 struct scatterlist
**sgp
)
1995 struct scatterlist
*sg
;
1997 for_each_sg(sgl
, sg
, sgcnt
, i
) {
1998 if (offset
< sg
->length
) {
2003 offset
-= sg
->length
;
2008 static int sgl_read_to_frags(struct scatterlist
*sg
, unsigned int sgoffset
,
2009 unsigned int dlen
, struct page_frag
*frags
,
2012 unsigned int datalen
= dlen
;
2013 unsigned int sglen
= sg
->length
- sgoffset
;
2014 struct page
*page
= sg_page(sg
);
2024 pr_warn("sg %d NULL, len %u/%u.\n",
2033 copy
= min(datalen
, sglen
);
2034 if (i
&& page
== frags
[i
- 1].page
&&
2035 sgoffset
+ sg
->offset
==
2036 frags
[i
- 1].offset
+ frags
[i
- 1].size
) {
2037 frags
[i
- 1].size
+= copy
;
2039 if (i
>= frag_max
) {
2040 pr_warn("too many pages %u, dlen %u.\n",
2045 frags
[i
].page
= page
;
2046 frags
[i
].offset
= sg
->offset
+ sgoffset
;
2047 frags
[i
].size
= copy
;
2058 int cxgbi_conn_alloc_pdu(struct iscsi_task
*task
, u8 opcode
)
2060 struct iscsi_tcp_conn
*tcp_conn
= task
->conn
->dd_data
;
2061 struct cxgbi_conn
*cconn
= tcp_conn
->dd_data
;
2062 struct cxgbi_device
*cdev
= cconn
->chba
->cdev
;
2063 struct iscsi_conn
*conn
= task
->conn
;
2064 struct iscsi_tcp_task
*tcp_task
= task
->dd_data
;
2065 struct cxgbi_task_data
*tdata
= iscsi_task_cxgbi_data(task
);
2066 struct scsi_cmnd
*sc
= task
->sc
;
2067 int headroom
= SKB_TX_ISCSI_PDU_HEADER_MAX
;
2069 tcp_task
->dd_data
= tdata
;
2072 if (SKB_MAX_HEAD(cdev
->skb_tx_rsvd
) > (512 * MAX_SKB_FRAGS
) &&
2073 (opcode
== ISCSI_OP_SCSI_DATA_OUT
||
2074 (opcode
== ISCSI_OP_SCSI_CMD
&&
2075 (scsi_bidi_cmnd(sc
) || sc
->sc_data_direction
== DMA_TO_DEVICE
))))
2076 /* data could goes into skb head */
2077 headroom
+= min_t(unsigned int,
2078 SKB_MAX_HEAD(cdev
->skb_tx_rsvd
),
2079 conn
->max_xmit_dlength
);
2081 tdata
->skb
= alloc_skb(cdev
->skb_tx_rsvd
+ headroom
, GFP_ATOMIC
);
2083 struct cxgbi_sock
*csk
= cconn
->cep
->csk
;
2084 struct net_device
*ndev
= cdev
->ports
[csk
->port_id
];
2085 ndev
->stats
.tx_dropped
++;
2089 skb_reserve(tdata
->skb
, cdev
->skb_tx_rsvd
);
2090 task
->hdr
= (struct iscsi_hdr
*)tdata
->skb
->data
;
2091 task
->hdr_max
= SKB_TX_ISCSI_PDU_HEADER_MAX
; /* BHS + AHS */
2093 /* data_out uses scsi_cmd's itt */
2094 if (opcode
!= ISCSI_OP_SCSI_DATA_OUT
)
2095 task_reserve_itt(task
, &task
->hdr
->itt
);
2097 log_debug(1 << CXGBI_DBG_ISCSI
| 1 << CXGBI_DBG_PDU_TX
,
2098 "task 0x%p, op 0x%x, skb 0x%p,%u+%u/%u, itt 0x%x.\n",
2099 task
, opcode
, tdata
->skb
, cdev
->skb_tx_rsvd
, headroom
,
2100 conn
->max_xmit_dlength
, ntohl(task
->hdr
->itt
));
2104 EXPORT_SYMBOL_GPL(cxgbi_conn_alloc_pdu
);
2106 static inline void tx_skb_setmode(struct sk_buff
*skb
, int hcrc
, int dcrc
)
2115 cxgbi_skcb_ulp_mode(skb
) = (ULP2_MODE_ISCSI
<< 4) | submode
;
2117 cxgbi_skcb_ulp_mode(skb
) = 0;
2120 int cxgbi_conn_init_pdu(struct iscsi_task
*task
, unsigned int offset
,
2123 struct iscsi_conn
*conn
= task
->conn
;
2124 struct cxgbi_task_data
*tdata
= iscsi_task_cxgbi_data(task
);
2125 struct sk_buff
*skb
= tdata
->skb
;
2126 unsigned int datalen
= count
;
2127 int i
, padlen
= iscsi_padding(count
);
2130 log_debug(1 << CXGBI_DBG_ISCSI
| 1 << CXGBI_DBG_PDU_TX
,
2131 "task 0x%p,0x%p, skb 0x%p, 0x%x,0x%x,0x%x, %u+%u.\n",
2132 task
, task
->sc
, skb
, (*skb
->data
) & ISCSI_OPCODE_MASK
,
2133 ntohl(task
->cmdsn
), ntohl(task
->hdr
->itt
), offset
, count
);
2135 skb_put(skb
, task
->hdr_len
);
2136 tx_skb_setmode(skb
, conn
->hdrdgst_en
, datalen
? conn
->datadgst_en
: 0);
2141 struct scsi_data_buffer
*sdb
= scsi_out(task
->sc
);
2142 struct scatterlist
*sg
= NULL
;
2145 tdata
->offset
= offset
;
2146 tdata
->count
= count
;
2147 err
= sgl_seek_offset(
2148 sdb
->table
.sgl
, sdb
->table
.nents
,
2149 tdata
->offset
, &tdata
->sgoffset
, &sg
);
2151 pr_warn("tpdu, sgl %u, bad offset %u/%u.\n",
2152 sdb
->table
.nents
, tdata
->offset
, sdb
->length
);
2155 err
= sgl_read_to_frags(sg
, tdata
->sgoffset
, tdata
->count
,
2156 tdata
->frags
, MAX_PDU_FRAGS
);
2158 pr_warn("tpdu, sgl %u, bad offset %u + %u.\n",
2159 sdb
->table
.nents
, tdata
->offset
, tdata
->count
);
2162 tdata
->nr_frags
= err
;
2164 if (tdata
->nr_frags
> MAX_SKB_FRAGS
||
2165 (padlen
&& tdata
->nr_frags
== MAX_SKB_FRAGS
)) {
2166 char *dst
= skb
->data
+ task
->hdr_len
;
2167 struct page_frag
*frag
= tdata
->frags
;
2169 /* data fits in the skb's headroom */
2170 for (i
= 0; i
< tdata
->nr_frags
; i
++, frag
++) {
2171 char *src
= kmap_atomic(frag
->page
);
2173 memcpy(dst
, src
+frag
->offset
, frag
->size
);
2178 memset(dst
, 0, padlen
);
2181 skb_put(skb
, count
+ padlen
);
2183 /* data fit into frag_list */
2184 for (i
= 0; i
< tdata
->nr_frags
; i
++) {
2185 __skb_fill_page_desc(skb
, i
,
2186 tdata
->frags
[i
].page
,
2187 tdata
->frags
[i
].offset
,
2188 tdata
->frags
[i
].size
);
2189 skb_frag_ref(skb
, i
);
2191 skb_shinfo(skb
)->nr_frags
= tdata
->nr_frags
;
2193 skb
->data_len
+= count
;
2194 skb
->truesize
+= count
;
2198 pg
= virt_to_page(task
->data
);
2201 skb_fill_page_desc(skb
, 0, pg
, offset_in_page(task
->data
),
2204 skb
->data_len
+= count
;
2205 skb
->truesize
+= count
;
2209 i
= skb_shinfo(skb
)->nr_frags
;
2210 skb_fill_page_desc(skb
, skb_shinfo(skb
)->nr_frags
,
2211 virt_to_page(padding
), offset_in_page(padding
),
2214 skb
->data_len
+= padlen
;
2215 skb
->truesize
+= padlen
;
2221 EXPORT_SYMBOL_GPL(cxgbi_conn_init_pdu
);
2223 int cxgbi_conn_xmit_pdu(struct iscsi_task
*task
)
2225 struct iscsi_tcp_conn
*tcp_conn
= task
->conn
->dd_data
;
2226 struct cxgbi_conn
*cconn
= tcp_conn
->dd_data
;
2227 struct cxgbi_task_data
*tdata
= iscsi_task_cxgbi_data(task
);
2228 struct sk_buff
*skb
= tdata
->skb
;
2229 unsigned int datalen
;
2233 log_debug(1 << CXGBI_DBG_ISCSI
| 1 << CXGBI_DBG_PDU_TX
,
2234 "task 0x%p, skb NULL.\n", task
);
2238 datalen
= skb
->data_len
;
2240 err
= cxgbi_sock_send_pdus(cconn
->cep
->csk
, skb
);
2244 log_debug(1 << CXGBI_DBG_PDU_TX
,
2245 "task 0x%p,0x%p, skb 0x%p, len %u/%u, rv %d.\n",
2246 task
, task
->sc
, skb
, skb
->len
, skb
->data_len
, err
);
2248 if (task
->conn
->hdrdgst_en
)
2249 pdulen
+= ISCSI_DIGEST_SIZE
;
2251 if (datalen
&& task
->conn
->datadgst_en
)
2252 pdulen
+= ISCSI_DIGEST_SIZE
;
2254 task
->conn
->txdata_octets
+= pdulen
;
2258 if (err
== -EAGAIN
|| err
== -ENOBUFS
) {
2259 log_debug(1 << CXGBI_DBG_PDU_TX
,
2260 "task 0x%p, skb 0x%p, len %u/%u, %d EAGAIN.\n",
2261 task
, skb
, skb
->len
, skb
->data_len
, err
);
2262 /* reset skb to send when we are called again */
2268 log_debug(1 << CXGBI_DBG_ISCSI
| 1 << CXGBI_DBG_PDU_TX
,
2269 "itt 0x%x, skb 0x%p, len %u/%u, xmit err %d.\n",
2270 task
->itt
, skb
, skb
->len
, skb
->data_len
, err
);
2271 iscsi_conn_printk(KERN_ERR
, task
->conn
, "xmit err %d.\n", err
);
2272 iscsi_conn_failure(task
->conn
, ISCSI_ERR_XMIT_FAILED
);
2275 EXPORT_SYMBOL_GPL(cxgbi_conn_xmit_pdu
);
2277 void cxgbi_cleanup_task(struct iscsi_task
*task
)
2279 struct cxgbi_task_data
*tdata
= iscsi_task_cxgbi_data(task
);
2281 log_debug(1 << CXGBI_DBG_ISCSI
,
2282 "task 0x%p, skb 0x%p, itt 0x%x.\n",
2283 task
, tdata
->skb
, task
->hdr_itt
);
2285 /* never reached the xmit task callout */
2287 __kfree_skb(tdata
->skb
);
2288 memset(tdata
, 0, sizeof(*tdata
));
2290 task_release_itt(task
, task
->hdr_itt
);
2291 iscsi_tcp_cleanup_task(task
);
2293 EXPORT_SYMBOL_GPL(cxgbi_cleanup_task
);
2295 void cxgbi_get_conn_stats(struct iscsi_cls_conn
*cls_conn
,
2296 struct iscsi_stats
*stats
)
2298 struct iscsi_conn
*conn
= cls_conn
->dd_data
;
2300 stats
->txdata_octets
= conn
->txdata_octets
;
2301 stats
->rxdata_octets
= conn
->rxdata_octets
;
2302 stats
->scsicmd_pdus
= conn
->scsicmd_pdus_cnt
;
2303 stats
->dataout_pdus
= conn
->dataout_pdus_cnt
;
2304 stats
->scsirsp_pdus
= conn
->scsirsp_pdus_cnt
;
2305 stats
->datain_pdus
= conn
->datain_pdus_cnt
;
2306 stats
->r2t_pdus
= conn
->r2t_pdus_cnt
;
2307 stats
->tmfcmd_pdus
= conn
->tmfcmd_pdus_cnt
;
2308 stats
->tmfrsp_pdus
= conn
->tmfrsp_pdus_cnt
;
2309 stats
->digest_err
= 0;
2310 stats
->timeout_err
= 0;
2311 stats
->custom_length
= 1;
2312 strcpy(stats
->custom
[0].desc
, "eh_abort_cnt");
2313 stats
->custom
[0].value
= conn
->eh_abort_cnt
;
2315 EXPORT_SYMBOL_GPL(cxgbi_get_conn_stats
);
2317 static int cxgbi_conn_max_xmit_dlength(struct iscsi_conn
*conn
)
2319 struct iscsi_tcp_conn
*tcp_conn
= conn
->dd_data
;
2320 struct cxgbi_conn
*cconn
= tcp_conn
->dd_data
;
2321 struct cxgbi_device
*cdev
= cconn
->chba
->cdev
;
2322 unsigned int headroom
= SKB_MAX_HEAD(cdev
->skb_tx_rsvd
);
2323 unsigned int max_def
= 512 * MAX_SKB_FRAGS
;
2324 unsigned int max
= max(max_def
, headroom
);
2326 max
= min(cconn
->chba
->cdev
->tx_max_size
, max
);
2327 if (conn
->max_xmit_dlength
)
2328 conn
->max_xmit_dlength
= min(conn
->max_xmit_dlength
, max
);
2330 conn
->max_xmit_dlength
= max
;
2331 cxgbi_align_pdu_size(conn
->max_xmit_dlength
);
2336 static int cxgbi_conn_max_recv_dlength(struct iscsi_conn
*conn
)
2338 struct iscsi_tcp_conn
*tcp_conn
= conn
->dd_data
;
2339 struct cxgbi_conn
*cconn
= tcp_conn
->dd_data
;
2340 unsigned int max
= cconn
->chba
->cdev
->rx_max_size
;
2342 cxgbi_align_pdu_size(max
);
2344 if (conn
->max_recv_dlength
) {
2345 if (conn
->max_recv_dlength
> max
) {
2346 pr_err("MaxRecvDataSegmentLength %u > %u.\n",
2347 conn
->max_recv_dlength
, max
);
2350 conn
->max_recv_dlength
= min(conn
->max_recv_dlength
, max
);
2351 cxgbi_align_pdu_size(conn
->max_recv_dlength
);
2353 conn
->max_recv_dlength
= max
;
2358 int cxgbi_set_conn_param(struct iscsi_cls_conn
*cls_conn
,
2359 enum iscsi_param param
, char *buf
, int buflen
)
2361 struct iscsi_conn
*conn
= cls_conn
->dd_data
;
2362 struct iscsi_tcp_conn
*tcp_conn
= conn
->dd_data
;
2363 struct cxgbi_conn
*cconn
= tcp_conn
->dd_data
;
2364 struct cxgbi_sock
*csk
= cconn
->cep
->csk
;
2367 log_debug(1 << CXGBI_DBG_ISCSI
,
2368 "cls_conn 0x%p, param %d, buf(%d) %s.\n",
2369 cls_conn
, param
, buflen
, buf
);
2372 case ISCSI_PARAM_HDRDGST_EN
:
2373 err
= iscsi_set_param(cls_conn
, param
, buf
, buflen
);
2374 if (!err
&& conn
->hdrdgst_en
)
2375 err
= csk
->cdev
->csk_ddp_setup_digest(csk
, csk
->tid
,
2377 conn
->datadgst_en
, 0);
2379 case ISCSI_PARAM_DATADGST_EN
:
2380 err
= iscsi_set_param(cls_conn
, param
, buf
, buflen
);
2381 if (!err
&& conn
->datadgst_en
)
2382 err
= csk
->cdev
->csk_ddp_setup_digest(csk
, csk
->tid
,
2384 conn
->datadgst_en
, 0);
2386 case ISCSI_PARAM_MAX_R2T
:
2387 return iscsi_tcp_set_max_r2t(conn
, buf
);
2388 case ISCSI_PARAM_MAX_RECV_DLENGTH
:
2389 err
= iscsi_set_param(cls_conn
, param
, buf
, buflen
);
2391 err
= cxgbi_conn_max_recv_dlength(conn
);
2393 case ISCSI_PARAM_MAX_XMIT_DLENGTH
:
2394 err
= iscsi_set_param(cls_conn
, param
, buf
, buflen
);
2396 err
= cxgbi_conn_max_xmit_dlength(conn
);
2399 return iscsi_set_param(cls_conn
, param
, buf
, buflen
);
2403 EXPORT_SYMBOL_GPL(cxgbi_set_conn_param
);
2405 static inline int csk_print_port(struct cxgbi_sock
*csk
, char *buf
)
2409 cxgbi_sock_get(csk
);
2410 len
= sprintf(buf
, "%hu\n", ntohs(csk
->daddr
.sin_port
));
2411 cxgbi_sock_put(csk
);
2416 static inline int csk_print_ip(struct cxgbi_sock
*csk
, char *buf
)
2420 cxgbi_sock_get(csk
);
2421 if (csk
->csk_family
== AF_INET
)
2422 len
= sprintf(buf
, "%pI4",
2423 &csk
->daddr
.sin_addr
.s_addr
);
2425 len
= sprintf(buf
, "%pI6",
2426 &csk
->daddr6
.sin6_addr
);
2428 cxgbi_sock_put(csk
);
2433 int cxgbi_get_ep_param(struct iscsi_endpoint
*ep
, enum iscsi_param param
,
2436 struct cxgbi_endpoint
*cep
= ep
->dd_data
;
2437 struct cxgbi_sock
*csk
;
2440 log_debug(1 << CXGBI_DBG_ISCSI
,
2441 "cls_conn 0x%p, param %d.\n", ep
, param
);
2444 case ISCSI_PARAM_CONN_PORT
:
2445 case ISCSI_PARAM_CONN_ADDRESS
:
2453 return iscsi_conn_get_addr_param((struct sockaddr_storage
*)
2454 &csk
->daddr
, param
, buf
);
2460 EXPORT_SYMBOL_GPL(cxgbi_get_ep_param
);
2462 struct iscsi_cls_conn
*
2463 cxgbi_create_conn(struct iscsi_cls_session
*cls_session
, u32 cid
)
2465 struct iscsi_cls_conn
*cls_conn
;
2466 struct iscsi_conn
*conn
;
2467 struct iscsi_tcp_conn
*tcp_conn
;
2468 struct cxgbi_conn
*cconn
;
2470 cls_conn
= iscsi_tcp_conn_setup(cls_session
, sizeof(*cconn
), cid
);
2474 conn
= cls_conn
->dd_data
;
2475 tcp_conn
= conn
->dd_data
;
2476 cconn
= tcp_conn
->dd_data
;
2477 cconn
->iconn
= conn
;
2479 log_debug(1 << CXGBI_DBG_ISCSI
,
2480 "cid %u(0x%x), cls 0x%p,0x%p, conn 0x%p,0x%p,0x%p.\n",
2481 cid
, cid
, cls_session
, cls_conn
, conn
, tcp_conn
, cconn
);
2485 EXPORT_SYMBOL_GPL(cxgbi_create_conn
);
2487 int cxgbi_bind_conn(struct iscsi_cls_session
*cls_session
,
2488 struct iscsi_cls_conn
*cls_conn
,
2489 u64 transport_eph
, int is_leading
)
2491 struct iscsi_conn
*conn
= cls_conn
->dd_data
;
2492 struct iscsi_tcp_conn
*tcp_conn
= conn
->dd_data
;
2493 struct cxgbi_conn
*cconn
= tcp_conn
->dd_data
;
2494 struct iscsi_endpoint
*ep
;
2495 struct cxgbi_endpoint
*cep
;
2496 struct cxgbi_sock
*csk
;
2499 ep
= iscsi_lookup_endpoint(transport_eph
);
2503 /* setup ddp pagesize */
2506 err
= csk
->cdev
->csk_ddp_setup_pgidx(csk
, csk
->tid
, page_idx
, 0);
2510 err
= iscsi_conn_bind(cls_session
, cls_conn
, is_leading
);
2514 /* calculate the tag idx bits needed for this conn based on cmds_max */
2515 cconn
->task_idx_bits
= (__ilog2_u32(conn
->session
->cmds_max
- 1)) + 1;
2517 write_lock_bh(&csk
->callback_lock
);
2518 csk
->user_data
= conn
;
2519 cconn
->chba
= cep
->chba
;
2522 write_unlock_bh(&csk
->callback_lock
);
2524 cxgbi_conn_max_xmit_dlength(conn
);
2525 cxgbi_conn_max_recv_dlength(conn
);
2527 log_debug(1 << CXGBI_DBG_ISCSI
,
2528 "cls 0x%p,0x%p, ep 0x%p, cconn 0x%p, csk 0x%p.\n",
2529 cls_session
, cls_conn
, ep
, cconn
, csk
);
2530 /* init recv engine */
2531 iscsi_tcp_hdr_recv_prep(tcp_conn
);
2535 EXPORT_SYMBOL_GPL(cxgbi_bind_conn
);
2537 struct iscsi_cls_session
*cxgbi_create_session(struct iscsi_endpoint
*ep
,
2538 u16 cmds_max
, u16 qdepth
,
2541 struct cxgbi_endpoint
*cep
;
2542 struct cxgbi_hba
*chba
;
2543 struct Scsi_Host
*shost
;
2544 struct iscsi_cls_session
*cls_session
;
2545 struct iscsi_session
*session
;
2548 pr_err("missing endpoint.\n");
2554 shost
= chba
->shost
;
2556 BUG_ON(chba
!= iscsi_host_priv(shost
));
2558 cls_session
= iscsi_session_setup(chba
->cdev
->itp
, shost
,
2560 sizeof(struct iscsi_tcp_task
) +
2561 sizeof(struct cxgbi_task_data
),
2562 initial_cmdsn
, ISCSI_MAX_TARGET
);
2566 session
= cls_session
->dd_data
;
2567 if (iscsi_tcp_r2tpool_alloc(session
))
2568 goto remove_session
;
2570 log_debug(1 << CXGBI_DBG_ISCSI
,
2571 "ep 0x%p, cls sess 0x%p.\n", ep
, cls_session
);
2575 iscsi_session_teardown(cls_session
);
2578 EXPORT_SYMBOL_GPL(cxgbi_create_session
);
2580 void cxgbi_destroy_session(struct iscsi_cls_session
*cls_session
)
2582 log_debug(1 << CXGBI_DBG_ISCSI
,
2583 "cls sess 0x%p.\n", cls_session
);
2585 iscsi_tcp_r2tpool_free(cls_session
->dd_data
);
2586 iscsi_session_teardown(cls_session
);
2588 EXPORT_SYMBOL_GPL(cxgbi_destroy_session
);
2590 int cxgbi_set_host_param(struct Scsi_Host
*shost
, enum iscsi_host_param param
,
2591 char *buf
, int buflen
)
2593 struct cxgbi_hba
*chba
= iscsi_host_priv(shost
);
2596 shost_printk(KERN_ERR
, shost
, "Could not get host param. "
2597 "netdev for host not set.\n");
2601 log_debug(1 << CXGBI_DBG_ISCSI
,
2602 "shost 0x%p, hba 0x%p,%s, param %d, buf(%d) %s.\n",
2603 shost
, chba
, chba
->ndev
->name
, param
, buflen
, buf
);
2606 case ISCSI_HOST_PARAM_IPADDRESS
:
2608 __be32 addr
= in_aton(buf
);
2609 log_debug(1 << CXGBI_DBG_ISCSI
,
2610 "hba %s, req. ipv4 %pI4.\n", chba
->ndev
->name
, &addr
);
2611 cxgbi_set_iscsi_ipv4(chba
, addr
);
2614 case ISCSI_HOST_PARAM_HWADDRESS
:
2615 case ISCSI_HOST_PARAM_NETDEV_NAME
:
2618 return iscsi_host_set_param(shost
, param
, buf
, buflen
);
2621 EXPORT_SYMBOL_GPL(cxgbi_set_host_param
);
2623 int cxgbi_get_host_param(struct Scsi_Host
*shost
, enum iscsi_host_param param
,
2626 struct cxgbi_hba
*chba
= iscsi_host_priv(shost
);
2630 shost_printk(KERN_ERR
, shost
, "Could not get host param. "
2631 "netdev for host not set.\n");
2635 log_debug(1 << CXGBI_DBG_ISCSI
,
2636 "shost 0x%p, hba 0x%p,%s, param %d.\n",
2637 shost
, chba
, chba
->ndev
->name
, param
);
2640 case ISCSI_HOST_PARAM_HWADDRESS
:
2641 len
= sysfs_format_mac(buf
, chba
->ndev
->dev_addr
, 6);
2643 case ISCSI_HOST_PARAM_NETDEV_NAME
:
2644 len
= sprintf(buf
, "%s\n", chba
->ndev
->name
);
2646 case ISCSI_HOST_PARAM_IPADDRESS
:
2650 addr
= cxgbi_get_iscsi_ipv4(chba
);
2651 len
= sprintf(buf
, "%pI4", &addr
);
2652 log_debug(1 << CXGBI_DBG_ISCSI
,
2653 "hba %s, ipv4 %pI4.\n", chba
->ndev
->name
, &addr
);
2657 return iscsi_host_get_param(shost
, param
, buf
);
2662 EXPORT_SYMBOL_GPL(cxgbi_get_host_param
);
2664 struct iscsi_endpoint
*cxgbi_ep_connect(struct Scsi_Host
*shost
,
2665 struct sockaddr
*dst_addr
,
2668 struct iscsi_endpoint
*ep
;
2669 struct cxgbi_endpoint
*cep
;
2670 struct cxgbi_hba
*hba
= NULL
;
2671 struct cxgbi_sock
*csk
;
2674 log_debug(1 << CXGBI_DBG_ISCSI
| 1 << CXGBI_DBG_SOCK
,
2675 "shost 0x%p, non_blocking %d, dst_addr 0x%p.\n",
2676 shost
, non_blocking
, dst_addr
);
2679 hba
= iscsi_host_priv(shost
);
2681 pr_info("shost 0x%p, priv NULL.\n", shost
);
2686 if (dst_addr
->sa_family
== AF_INET
) {
2687 csk
= cxgbi_check_route(dst_addr
);
2688 #if IS_ENABLED(CONFIG_IPV6)
2689 } else if (dst_addr
->sa_family
== AF_INET6
) {
2690 csk
= cxgbi_check_route6(dst_addr
);
2693 pr_info("address family 0x%x NOT supported.\n",
2694 dst_addr
->sa_family
);
2695 err
= -EAFNOSUPPORT
;
2696 return (struct iscsi_endpoint
*)ERR_PTR(err
);
2700 return (struct iscsi_endpoint
*)csk
;
2701 cxgbi_sock_get(csk
);
2704 hba
= csk
->cdev
->hbas
[csk
->port_id
];
2705 else if (hba
!= csk
->cdev
->hbas
[csk
->port_id
]) {
2706 pr_info("Could not connect through requested host %u"
2707 "hba 0x%p != 0x%p (%u).\n",
2708 shost
->host_no
, hba
,
2709 csk
->cdev
->hbas
[csk
->port_id
], csk
->port_id
);
2714 err
= sock_get_port(csk
);
2718 cxgbi_sock_set_state(csk
, CTP_CONNECTING
);
2719 err
= csk
->cdev
->csk_init_act_open(csk
);
2723 if (cxgbi_sock_is_closing(csk
)) {
2725 pr_info("csk 0x%p is closing.\n", csk
);
2729 ep
= iscsi_create_endpoint(sizeof(*cep
));
2732 pr_info("iscsi alloc ep, OOM.\n");
2740 log_debug(1 << CXGBI_DBG_ISCSI
| 1 << CXGBI_DBG_SOCK
,
2741 "ep 0x%p, cep 0x%p, csk 0x%p, hba 0x%p,%s.\n",
2742 ep
, cep
, csk
, hba
, hba
->ndev
->name
);
2746 cxgbi_sock_put(csk
);
2747 cxgbi_sock_closed(csk
);
2749 return ERR_PTR(err
);
2751 EXPORT_SYMBOL_GPL(cxgbi_ep_connect
);
2753 int cxgbi_ep_poll(struct iscsi_endpoint
*ep
, int timeout_ms
)
2755 struct cxgbi_endpoint
*cep
= ep
->dd_data
;
2756 struct cxgbi_sock
*csk
= cep
->csk
;
2758 if (!cxgbi_sock_is_established(csk
))
2762 EXPORT_SYMBOL_GPL(cxgbi_ep_poll
);
2764 void cxgbi_ep_disconnect(struct iscsi_endpoint
*ep
)
2766 struct cxgbi_endpoint
*cep
= ep
->dd_data
;
2767 struct cxgbi_conn
*cconn
= cep
->cconn
;
2768 struct cxgbi_sock
*csk
= cep
->csk
;
2770 log_debug(1 << CXGBI_DBG_ISCSI
| 1 << CXGBI_DBG_SOCK
,
2771 "ep 0x%p, cep 0x%p, cconn 0x%p, csk 0x%p,%u,0x%lx.\n",
2772 ep
, cep
, cconn
, csk
, csk
->state
, csk
->flags
);
2774 if (cconn
&& cconn
->iconn
) {
2775 iscsi_suspend_tx(cconn
->iconn
);
2776 write_lock_bh(&csk
->callback_lock
);
2777 cep
->csk
->user_data
= NULL
;
2779 write_unlock_bh(&csk
->callback_lock
);
2781 iscsi_destroy_endpoint(ep
);
2783 if (likely(csk
->state
>= CTP_ESTABLISHED
))
2784 need_active_close(csk
);
2786 cxgbi_sock_closed(csk
);
2788 cxgbi_sock_put(csk
);
2790 EXPORT_SYMBOL_GPL(cxgbi_ep_disconnect
);
2792 int cxgbi_iscsi_init(struct iscsi_transport
*itp
,
2793 struct scsi_transport_template
**stt
)
2795 *stt
= iscsi_register_transport(itp
);
2797 pr_err("unable to register %s transport 0x%p.\n",
2801 log_debug(1 << CXGBI_DBG_ISCSI
,
2802 "%s, registered iscsi transport 0x%p.\n",
2806 EXPORT_SYMBOL_GPL(cxgbi_iscsi_init
);
2808 void cxgbi_iscsi_cleanup(struct iscsi_transport
*itp
,
2809 struct scsi_transport_template
**stt
)
2812 log_debug(1 << CXGBI_DBG_ISCSI
,
2813 "de-register transport 0x%p, %s, stt 0x%p.\n",
2814 itp
, itp
->name
, *stt
);
2816 iscsi_unregister_transport(itp
);
2819 EXPORT_SYMBOL_GPL(cxgbi_iscsi_cleanup
);
2821 umode_t
cxgbi_attr_is_visible(int param_type
, int param
)
2823 switch (param_type
) {
2824 case ISCSI_HOST_PARAM
:
2826 case ISCSI_HOST_PARAM_NETDEV_NAME
:
2827 case ISCSI_HOST_PARAM_HWADDRESS
:
2828 case ISCSI_HOST_PARAM_IPADDRESS
:
2829 case ISCSI_HOST_PARAM_INITIATOR_NAME
:
2836 case ISCSI_PARAM_MAX_RECV_DLENGTH
:
2837 case ISCSI_PARAM_MAX_XMIT_DLENGTH
:
2838 case ISCSI_PARAM_HDRDGST_EN
:
2839 case ISCSI_PARAM_DATADGST_EN
:
2840 case ISCSI_PARAM_CONN_ADDRESS
:
2841 case ISCSI_PARAM_CONN_PORT
:
2842 case ISCSI_PARAM_EXP_STATSN
:
2843 case ISCSI_PARAM_PERSISTENT_ADDRESS
:
2844 case ISCSI_PARAM_PERSISTENT_PORT
:
2845 case ISCSI_PARAM_PING_TMO
:
2846 case ISCSI_PARAM_RECV_TMO
:
2847 case ISCSI_PARAM_INITIAL_R2T_EN
:
2848 case ISCSI_PARAM_MAX_R2T
:
2849 case ISCSI_PARAM_IMM_DATA_EN
:
2850 case ISCSI_PARAM_FIRST_BURST
:
2851 case ISCSI_PARAM_MAX_BURST
:
2852 case ISCSI_PARAM_PDU_INORDER_EN
:
2853 case ISCSI_PARAM_DATASEQ_INORDER_EN
:
2854 case ISCSI_PARAM_ERL
:
2855 case ISCSI_PARAM_TARGET_NAME
:
2856 case ISCSI_PARAM_TPGT
:
2857 case ISCSI_PARAM_USERNAME
:
2858 case ISCSI_PARAM_PASSWORD
:
2859 case ISCSI_PARAM_USERNAME_IN
:
2860 case ISCSI_PARAM_PASSWORD_IN
:
2861 case ISCSI_PARAM_FAST_ABORT
:
2862 case ISCSI_PARAM_ABORT_TMO
:
2863 case ISCSI_PARAM_LU_RESET_TMO
:
2864 case ISCSI_PARAM_TGT_RESET_TMO
:
2865 case ISCSI_PARAM_IFACE_NAME
:
2866 case ISCSI_PARAM_INITIATOR_NAME
:
2875 EXPORT_SYMBOL_GPL(cxgbi_attr_is_visible
);
2877 static int __init
libcxgbi_init_module(void)
2879 sw_tag_idx_bits
= (__ilog2_u32(ISCSI_ITT_MASK
)) + 1;
2880 sw_tag_age_bits
= (__ilog2_u32(ISCSI_AGE_MASK
)) + 1;
2882 pr_info("tag itt 0x%x, %u bits, age 0x%x, %u bits.\n",
2883 ISCSI_ITT_MASK
, sw_tag_idx_bits
,
2884 ISCSI_AGE_MASK
, sw_tag_age_bits
);
2886 ddp_setup_host_page_size();
2890 static void __exit
libcxgbi_exit_module(void)
2892 cxgbi_device_unregister_all(0xFF);
2896 module_init(libcxgbi_init_module
);
2897 module_exit(libcxgbi_exit_module
);