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9ba682f0 | 1 | /* |
2 | * libcxgbi.c: Chelsio common library for T3/T4 iSCSI driver. | |
3 | * | |
1149a5ed | 4 | * Copyright (c) 2010-2015 Chelsio Communications, Inc. |
9ba682f0 | 5 | * |
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. | |
9 | * | |
10 | * Written by: Karen Xie (kxie@chelsio.com) | |
11 | * Written by: Rakesh Ranjan (rranjan@chelsio.com) | |
12 | */ | |
13 | ||
14 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ | |
15 | ||
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> | |
25 | #include <net/dst.h> | |
26 | #include <net/route.h> | |
fc8d0590 AB |
27 | #include <net/ipv6.h> |
28 | #include <net/ip6_route.h> | |
29 | #include <net/addrconf.h> | |
30 | ||
9ba682f0 | 31 | #include <linux/inetdevice.h> /* ip_dev_find */ |
acf3368f | 32 | #include <linux/module.h> |
9ba682f0 | 33 | #include <net/tcp.h> |
34 | ||
35 | static unsigned int dbg_level; | |
36 | ||
37 | #include "libcxgbi.h" | |
38 | ||
39 | #define DRV_MODULE_NAME "libcxgbi" | |
40 | #define DRV_MODULE_DESC "Chelsio iSCSI driver library" | |
0ea5bf3d KX |
41 | #define DRV_MODULE_VERSION "0.9.1-ko" |
42 | #define DRV_MODULE_RELDATE "Apr. 2015" | |
43 | ||
44 | static char version[] = | |
45 | DRV_MODULE_DESC " " DRV_MODULE_NAME | |
46 | " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; | |
9ba682f0 | 47 | |
48 | MODULE_AUTHOR("Chelsio Communications, Inc."); | |
49 | MODULE_DESCRIPTION(DRV_MODULE_DESC); | |
50 | MODULE_VERSION(DRV_MODULE_VERSION); | |
51 | MODULE_LICENSE("GPL"); | |
52 | ||
53 | module_param(dbg_level, uint, 0644); | |
54 | MODULE_PARM_DESC(dbg_level, "libiscsi debug level (default=0)"); | |
55 | ||
56 | ||
57 | /* | |
58 | * cxgbi device management | |
59 | * maintains a list of the cxgbi devices | |
60 | */ | |
61 | static LIST_HEAD(cdev_list); | |
62 | static DEFINE_MUTEX(cdev_mutex); | |
63 | ||
576b5863 AB |
64 | static LIST_HEAD(cdev_rcu_list); |
65 | static DEFINE_SPINLOCK(cdev_rcu_lock); | |
66 | ||
71f7a00b VP |
67 | static inline void cxgbi_decode_sw_tag(u32 sw_tag, int *idx, int *age) |
68 | { | |
69 | if (age) | |
70 | *age = sw_tag & 0x7FFF; | |
71 | if (idx) | |
72 | *idx = (sw_tag >> 16) & 0x7FFF; | |
73 | } | |
74 | ||
9ba682f0 | 75 | int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base, |
76 | unsigned int max_conn) | |
77 | { | |
78 | struct cxgbi_ports_map *pmap = &cdev->pmap; | |
79 | ||
80 | pmap->port_csk = cxgbi_alloc_big_mem(max_conn * | |
81 | sizeof(struct cxgbi_sock *), | |
82 | GFP_KERNEL); | |
83 | if (!pmap->port_csk) { | |
84 | pr_warn("cdev 0x%p, portmap OOM %u.\n", cdev, max_conn); | |
85 | return -ENOMEM; | |
86 | } | |
87 | ||
88 | pmap->max_connect = max_conn; | |
89 | pmap->sport_base = base; | |
90 | spin_lock_init(&pmap->lock); | |
91 | return 0; | |
92 | } | |
93 | EXPORT_SYMBOL_GPL(cxgbi_device_portmap_create); | |
94 | ||
95 | void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev) | |
96 | { | |
97 | struct cxgbi_ports_map *pmap = &cdev->pmap; | |
98 | struct cxgbi_sock *csk; | |
99 | int i; | |
100 | ||
101 | for (i = 0; i < pmap->max_connect; i++) { | |
102 | if (pmap->port_csk[i]) { | |
103 | csk = pmap->port_csk[i]; | |
104 | pmap->port_csk[i] = NULL; | |
105 | log_debug(1 << CXGBI_DBG_SOCK, | |
106 | "csk 0x%p, cdev 0x%p, offload down.\n", | |
107 | csk, cdev); | |
108 | spin_lock_bh(&csk->lock); | |
109 | cxgbi_sock_set_flag(csk, CTPF_OFFLOAD_DOWN); | |
110 | cxgbi_sock_closed(csk); | |
111 | spin_unlock_bh(&csk->lock); | |
112 | cxgbi_sock_put(csk); | |
113 | } | |
114 | } | |
115 | } | |
116 | EXPORT_SYMBOL_GPL(cxgbi_device_portmap_cleanup); | |
117 | ||
118 | static inline void cxgbi_device_destroy(struct cxgbi_device *cdev) | |
119 | { | |
120 | log_debug(1 << CXGBI_DBG_DEV, | |
121 | "cdev 0x%p, p# %u.\n", cdev, cdev->nports); | |
122 | cxgbi_hbas_remove(cdev); | |
123 | cxgbi_device_portmap_cleanup(cdev); | |
9d5c44b7 | 124 | cxgbi_ppm_release(cdev->cdev2ppm(cdev)); |
9ba682f0 | 125 | if (cdev->pmap.max_connect) |
126 | cxgbi_free_big_mem(cdev->pmap.port_csk); | |
127 | kfree(cdev); | |
128 | } | |
129 | ||
130 | struct cxgbi_device *cxgbi_device_register(unsigned int extra, | |
131 | unsigned int nports) | |
132 | { | |
133 | struct cxgbi_device *cdev; | |
134 | ||
135 | cdev = kzalloc(sizeof(*cdev) + extra + nports * | |
136 | (sizeof(struct cxgbi_hba *) + | |
137 | sizeof(struct net_device *)), | |
138 | GFP_KERNEL); | |
139 | if (!cdev) { | |
140 | pr_warn("nport %d, OOM.\n", nports); | |
141 | return NULL; | |
142 | } | |
143 | cdev->ports = (struct net_device **)(cdev + 1); | |
144 | cdev->hbas = (struct cxgbi_hba **)(((char*)cdev->ports) + nports * | |
145 | sizeof(struct net_device *)); | |
146 | if (extra) | |
147 | cdev->dd_data = ((char *)cdev->hbas) + | |
148 | nports * sizeof(struct cxgbi_hba *); | |
149 | spin_lock_init(&cdev->pmap.lock); | |
150 | ||
151 | mutex_lock(&cdev_mutex); | |
152 | list_add_tail(&cdev->list_head, &cdev_list); | |
153 | mutex_unlock(&cdev_mutex); | |
154 | ||
576b5863 AB |
155 | spin_lock(&cdev_rcu_lock); |
156 | list_add_tail_rcu(&cdev->rcu_node, &cdev_rcu_list); | |
157 | spin_unlock(&cdev_rcu_lock); | |
158 | ||
9ba682f0 | 159 | log_debug(1 << CXGBI_DBG_DEV, |
160 | "cdev 0x%p, p# %u.\n", cdev, nports); | |
161 | return cdev; | |
162 | } | |
163 | EXPORT_SYMBOL_GPL(cxgbi_device_register); | |
164 | ||
165 | void cxgbi_device_unregister(struct cxgbi_device *cdev) | |
166 | { | |
167 | log_debug(1 << CXGBI_DBG_DEV, | |
168 | "cdev 0x%p, p# %u,%s.\n", | |
169 | cdev, cdev->nports, cdev->nports ? cdev->ports[0]->name : ""); | |
576b5863 | 170 | |
9ba682f0 | 171 | mutex_lock(&cdev_mutex); |
172 | list_del(&cdev->list_head); | |
173 | mutex_unlock(&cdev_mutex); | |
576b5863 AB |
174 | |
175 | spin_lock(&cdev_rcu_lock); | |
176 | list_del_rcu(&cdev->rcu_node); | |
177 | spin_unlock(&cdev_rcu_lock); | |
178 | synchronize_rcu(); | |
179 | ||
9ba682f0 | 180 | cxgbi_device_destroy(cdev); |
181 | } | |
182 | EXPORT_SYMBOL_GPL(cxgbi_device_unregister); | |
183 | ||
184 | void cxgbi_device_unregister_all(unsigned int flag) | |
185 | { | |
186 | struct cxgbi_device *cdev, *tmp; | |
187 | ||
188 | mutex_lock(&cdev_mutex); | |
189 | list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) { | |
190 | if ((cdev->flags & flag) == flag) { | |
576b5863 AB |
191 | mutex_unlock(&cdev_mutex); |
192 | cxgbi_device_unregister(cdev); | |
193 | mutex_lock(&cdev_mutex); | |
9ba682f0 | 194 | } |
195 | } | |
196 | mutex_unlock(&cdev_mutex); | |
197 | } | |
198 | EXPORT_SYMBOL_GPL(cxgbi_device_unregister_all); | |
199 | ||
200 | struct cxgbi_device *cxgbi_device_find_by_lldev(void *lldev) | |
201 | { | |
202 | struct cxgbi_device *cdev, *tmp; | |
203 | ||
204 | mutex_lock(&cdev_mutex); | |
205 | list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) { | |
206 | if (cdev->lldev == lldev) { | |
207 | mutex_unlock(&cdev_mutex); | |
208 | return cdev; | |
209 | } | |
210 | } | |
211 | mutex_unlock(&cdev_mutex); | |
576b5863 | 212 | |
9ba682f0 | 213 | log_debug(1 << CXGBI_DBG_DEV, |
214 | "lldev 0x%p, NO match found.\n", lldev); | |
215 | return NULL; | |
216 | } | |
217 | EXPORT_SYMBOL_GPL(cxgbi_device_find_by_lldev); | |
218 | ||
fc8d0590 AB |
219 | struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev, |
220 | int *port) | |
9ba682f0 | 221 | { |
0b3d8947 | 222 | struct net_device *vdev = NULL; |
9ba682f0 | 223 | struct cxgbi_device *cdev, *tmp; |
224 | int i; | |
225 | ||
0b3d8947 | 226 | if (ndev->priv_flags & IFF_802_1Q_VLAN) { |
227 | vdev = ndev; | |
9ba682f0 | 228 | ndev = vlan_dev_real_dev(ndev); |
0b3d8947 | 229 | log_debug(1 << CXGBI_DBG_DEV, |
230 | "vlan dev %s -> %s.\n", vdev->name, ndev->name); | |
231 | } | |
9ba682f0 | 232 | |
233 | mutex_lock(&cdev_mutex); | |
234 | list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) { | |
235 | for (i = 0; i < cdev->nports; i++) { | |
236 | if (ndev == cdev->ports[i]) { | |
0b3d8947 | 237 | cdev->hbas[i]->vdev = vdev; |
9ba682f0 | 238 | mutex_unlock(&cdev_mutex); |
239 | if (port) | |
240 | *port = i; | |
241 | return cdev; | |
242 | } | |
243 | } | |
244 | } | |
245 | mutex_unlock(&cdev_mutex); | |
246 | log_debug(1 << CXGBI_DBG_DEV, | |
247 | "ndev 0x%p, %s, NO match found.\n", ndev, ndev->name); | |
248 | return NULL; | |
249 | } | |
fc8d0590 AB |
250 | EXPORT_SYMBOL_GPL(cxgbi_device_find_by_netdev); |
251 | ||
576b5863 AB |
252 | struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *ndev, |
253 | int *port) | |
254 | { | |
255 | struct net_device *vdev = NULL; | |
256 | struct cxgbi_device *cdev; | |
257 | int i; | |
258 | ||
259 | if (ndev->priv_flags & IFF_802_1Q_VLAN) { | |
260 | vdev = ndev; | |
261 | ndev = vlan_dev_real_dev(ndev); | |
262 | pr_info("vlan dev %s -> %s.\n", vdev->name, ndev->name); | |
263 | } | |
264 | ||
265 | rcu_read_lock(); | |
266 | list_for_each_entry_rcu(cdev, &cdev_rcu_list, rcu_node) { | |
267 | for (i = 0; i < cdev->nports; i++) { | |
268 | if (ndev == cdev->ports[i]) { | |
269 | cdev->hbas[i]->vdev = vdev; | |
270 | rcu_read_unlock(); | |
271 | if (port) | |
272 | *port = i; | |
273 | return cdev; | |
274 | } | |
275 | } | |
276 | } | |
277 | rcu_read_unlock(); | |
278 | ||
279 | log_debug(1 << CXGBI_DBG_DEV, | |
280 | "ndev 0x%p, %s, NO match found.\n", ndev, ndev->name); | |
281 | return NULL; | |
282 | } | |
283 | EXPORT_SYMBOL_GPL(cxgbi_device_find_by_netdev_rcu); | |
284 | ||
f42bb57c | 285 | #if IS_ENABLED(CONFIG_IPV6) |
fc8d0590 AB |
286 | static struct cxgbi_device *cxgbi_device_find_by_mac(struct net_device *ndev, |
287 | int *port) | |
288 | { | |
289 | struct net_device *vdev = NULL; | |
290 | struct cxgbi_device *cdev, *tmp; | |
291 | int i; | |
292 | ||
293 | if (ndev->priv_flags & IFF_802_1Q_VLAN) { | |
294 | vdev = ndev; | |
295 | ndev = vlan_dev_real_dev(ndev); | |
296 | pr_info("vlan dev %s -> %s.\n", vdev->name, ndev->name); | |
297 | } | |
298 | ||
299 | mutex_lock(&cdev_mutex); | |
300 | list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) { | |
301 | for (i = 0; i < cdev->nports; i++) { | |
302 | if (!memcmp(ndev->dev_addr, cdev->ports[i]->dev_addr, | |
303 | MAX_ADDR_LEN)) { | |
304 | cdev->hbas[i]->vdev = vdev; | |
305 | mutex_unlock(&cdev_mutex); | |
306 | if (port) | |
307 | *port = i; | |
308 | return cdev; | |
309 | } | |
310 | } | |
311 | } | |
312 | mutex_unlock(&cdev_mutex); | |
313 | log_debug(1 << CXGBI_DBG_DEV, | |
314 | "ndev 0x%p, %s, NO match mac found.\n", | |
315 | ndev, ndev->name); | |
316 | return NULL; | |
317 | } | |
f42bb57c | 318 | #endif |
9ba682f0 | 319 | |
9ba682f0 | 320 | void cxgbi_hbas_remove(struct cxgbi_device *cdev) |
321 | { | |
322 | int i; | |
323 | struct cxgbi_hba *chba; | |
324 | ||
325 | log_debug(1 << CXGBI_DBG_DEV, | |
326 | "cdev 0x%p, p#%u.\n", cdev, cdev->nports); | |
327 | ||
328 | for (i = 0; i < cdev->nports; i++) { | |
329 | chba = cdev->hbas[i]; | |
330 | if (chba) { | |
331 | cdev->hbas[i] = NULL; | |
332 | iscsi_host_remove(chba->shost); | |
333 | pci_dev_put(cdev->pdev); | |
334 | iscsi_host_free(chba->shost); | |
335 | } | |
336 | } | |
337 | } | |
338 | EXPORT_SYMBOL_GPL(cxgbi_hbas_remove); | |
339 | ||
1abf635d | 340 | int cxgbi_hbas_add(struct cxgbi_device *cdev, u64 max_lun, |
9ba682f0 | 341 | unsigned int max_id, struct scsi_host_template *sht, |
342 | struct scsi_transport_template *stt) | |
343 | { | |
344 | struct cxgbi_hba *chba; | |
345 | struct Scsi_Host *shost; | |
346 | int i, err; | |
347 | ||
348 | log_debug(1 << CXGBI_DBG_DEV, "cdev 0x%p, p#%u.\n", cdev, cdev->nports); | |
349 | ||
350 | for (i = 0; i < cdev->nports; i++) { | |
351 | shost = iscsi_host_alloc(sht, sizeof(*chba), 1); | |
352 | if (!shost) { | |
353 | pr_info("0x%p, p%d, %s, host alloc failed.\n", | |
354 | cdev, i, cdev->ports[i]->name); | |
355 | err = -ENOMEM; | |
356 | goto err_out; | |
357 | } | |
358 | ||
359 | shost->transportt = stt; | |
360 | shost->max_lun = max_lun; | |
361 | shost->max_id = max_id; | |
362 | shost->max_channel = 0; | |
363 | shost->max_cmd_len = 16; | |
364 | ||
365 | chba = iscsi_host_priv(shost); | |
366 | chba->cdev = cdev; | |
367 | chba->ndev = cdev->ports[i]; | |
368 | chba->shost = shost; | |
369 | ||
370 | log_debug(1 << CXGBI_DBG_DEV, | |
371 | "cdev 0x%p, p#%d %s: chba 0x%p.\n", | |
372 | cdev, i, cdev->ports[i]->name, chba); | |
373 | ||
374 | pci_dev_get(cdev->pdev); | |
375 | err = iscsi_host_add(shost, &cdev->pdev->dev); | |
376 | if (err) { | |
377 | pr_info("cdev 0x%p, p#%d %s, host add failed.\n", | |
378 | cdev, i, cdev->ports[i]->name); | |
379 | pci_dev_put(cdev->pdev); | |
380 | scsi_host_put(shost); | |
381 | goto err_out; | |
382 | } | |
383 | ||
384 | cdev->hbas[i] = chba; | |
385 | } | |
386 | ||
387 | return 0; | |
388 | ||
389 | err_out: | |
390 | cxgbi_hbas_remove(cdev); | |
391 | return err; | |
392 | } | |
393 | EXPORT_SYMBOL_GPL(cxgbi_hbas_add); | |
394 | ||
395 | /* | |
396 | * iSCSI offload | |
397 | * | |
398 | * - source port management | |
399 | * To find a free source port in the port allocation map we use a very simple | |
400 | * rotor scheme to look for the next free port. | |
401 | * | |
402 | * If a source port has been specified make sure that it doesn't collide with | |
403 | * our normal source port allocation map. If it's outside the range of our | |
404 | * allocation/deallocation scheme just let them use it. | |
405 | * | |
406 | * If the source port is outside our allocation range, the caller is | |
407 | * responsible for keeping track of their port usage. | |
408 | */ | |
dd9ad67e AB |
409 | |
410 | static struct cxgbi_sock *find_sock_on_port(struct cxgbi_device *cdev, | |
411 | unsigned char port_id) | |
412 | { | |
413 | struct cxgbi_ports_map *pmap = &cdev->pmap; | |
414 | unsigned int i; | |
415 | unsigned int used; | |
416 | ||
417 | if (!pmap->max_connect || !pmap->used) | |
418 | return NULL; | |
419 | ||
420 | spin_lock_bh(&pmap->lock); | |
421 | used = pmap->used; | |
422 | for (i = 0; used && i < pmap->max_connect; i++) { | |
423 | struct cxgbi_sock *csk = pmap->port_csk[i]; | |
424 | ||
425 | if (csk) { | |
426 | if (csk->port_id == port_id) { | |
427 | spin_unlock_bh(&pmap->lock); | |
428 | return csk; | |
429 | } | |
430 | used--; | |
431 | } | |
432 | } | |
433 | spin_unlock_bh(&pmap->lock); | |
434 | ||
435 | return NULL; | |
436 | } | |
437 | ||
9ba682f0 | 438 | static int sock_get_port(struct cxgbi_sock *csk) |
439 | { | |
440 | struct cxgbi_device *cdev = csk->cdev; | |
441 | struct cxgbi_ports_map *pmap = &cdev->pmap; | |
442 | unsigned int start; | |
443 | int idx; | |
fc8d0590 | 444 | __be16 *port; |
9ba682f0 | 445 | |
446 | if (!pmap->max_connect) { | |
447 | pr_err("cdev 0x%p, p#%u %s, NO port map.\n", | |
448 | cdev, csk->port_id, cdev->ports[csk->port_id]->name); | |
449 | return -EADDRNOTAVAIL; | |
450 | } | |
451 | ||
fc8d0590 AB |
452 | if (csk->csk_family == AF_INET) |
453 | port = &csk->saddr.sin_port; | |
454 | else /* ipv6 */ | |
455 | port = &csk->saddr6.sin6_port; | |
456 | ||
457 | if (*port) { | |
9ba682f0 | 458 | pr_err("source port NON-ZERO %u.\n", |
fc8d0590 | 459 | ntohs(*port)); |
9ba682f0 | 460 | return -EADDRINUSE; |
461 | } | |
462 | ||
463 | spin_lock_bh(&pmap->lock); | |
464 | if (pmap->used >= pmap->max_connect) { | |
465 | spin_unlock_bh(&pmap->lock); | |
466 | pr_info("cdev 0x%p, p#%u %s, ALL ports used.\n", | |
467 | cdev, csk->port_id, cdev->ports[csk->port_id]->name); | |
468 | return -EADDRNOTAVAIL; | |
469 | } | |
470 | ||
471 | start = idx = pmap->next; | |
472 | do { | |
473 | if (++idx >= pmap->max_connect) | |
474 | idx = 0; | |
475 | if (!pmap->port_csk[idx]) { | |
476 | pmap->used++; | |
fc8d0590 | 477 | *port = htons(pmap->sport_base + idx); |
9ba682f0 | 478 | pmap->next = idx; |
479 | pmap->port_csk[idx] = csk; | |
480 | spin_unlock_bh(&pmap->lock); | |
481 | cxgbi_sock_get(csk); | |
482 | log_debug(1 << CXGBI_DBG_SOCK, | |
483 | "cdev 0x%p, p#%u %s, p %u, %u.\n", | |
484 | cdev, csk->port_id, | |
485 | cdev->ports[csk->port_id]->name, | |
486 | pmap->sport_base + idx, pmap->next); | |
487 | return 0; | |
488 | } | |
489 | } while (idx != start); | |
490 | spin_unlock_bh(&pmap->lock); | |
491 | ||
492 | /* should not happen */ | |
493 | pr_warn("cdev 0x%p, p#%u %s, next %u?\n", | |
494 | cdev, csk->port_id, cdev->ports[csk->port_id]->name, | |
495 | pmap->next); | |
496 | return -EADDRNOTAVAIL; | |
497 | } | |
498 | ||
499 | static void sock_put_port(struct cxgbi_sock *csk) | |
500 | { | |
501 | struct cxgbi_device *cdev = csk->cdev; | |
502 | struct cxgbi_ports_map *pmap = &cdev->pmap; | |
fc8d0590 | 503 | __be16 *port; |
9ba682f0 | 504 | |
fc8d0590 AB |
505 | if (csk->csk_family == AF_INET) |
506 | port = &csk->saddr.sin_port; | |
507 | else /* ipv6 */ | |
508 | port = &csk->saddr6.sin6_port; | |
9ba682f0 | 509 | |
fc8d0590 AB |
510 | if (*port) { |
511 | int idx = ntohs(*port) - pmap->sport_base; | |
512 | ||
513 | *port = 0; | |
9ba682f0 | 514 | if (idx < 0 || idx >= pmap->max_connect) { |
515 | pr_err("cdev 0x%p, p#%u %s, port %u OOR.\n", | |
516 | cdev, csk->port_id, | |
517 | cdev->ports[csk->port_id]->name, | |
fc8d0590 | 518 | ntohs(*port)); |
9ba682f0 | 519 | return; |
520 | } | |
521 | ||
522 | spin_lock_bh(&pmap->lock); | |
523 | pmap->port_csk[idx] = NULL; | |
524 | pmap->used--; | |
525 | spin_unlock_bh(&pmap->lock); | |
526 | ||
527 | log_debug(1 << CXGBI_DBG_SOCK, | |
528 | "cdev 0x%p, p#%u %s, release %u.\n", | |
529 | cdev, csk->port_id, cdev->ports[csk->port_id]->name, | |
530 | pmap->sport_base + idx); | |
531 | ||
532 | cxgbi_sock_put(csk); | |
533 | } | |
534 | } | |
535 | ||
536 | /* | |
537 | * iscsi tcp connection | |
538 | */ | |
539 | void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *csk) | |
540 | { | |
541 | if (csk->cpl_close) { | |
542 | kfree_skb(csk->cpl_close); | |
543 | csk->cpl_close = NULL; | |
544 | } | |
545 | if (csk->cpl_abort_req) { | |
546 | kfree_skb(csk->cpl_abort_req); | |
547 | csk->cpl_abort_req = NULL; | |
548 | } | |
549 | if (csk->cpl_abort_rpl) { | |
550 | kfree_skb(csk->cpl_abort_rpl); | |
551 | csk->cpl_abort_rpl = NULL; | |
552 | } | |
553 | } | |
554 | EXPORT_SYMBOL_GPL(cxgbi_sock_free_cpl_skbs); | |
555 | ||
556 | static struct cxgbi_sock *cxgbi_sock_create(struct cxgbi_device *cdev) | |
557 | { | |
558 | struct cxgbi_sock *csk = kzalloc(sizeof(*csk), GFP_NOIO); | |
559 | ||
560 | if (!csk) { | |
561 | pr_info("alloc csk %zu failed.\n", sizeof(*csk)); | |
562 | return NULL; | |
563 | } | |
564 | ||
565 | if (cdev->csk_alloc_cpls(csk) < 0) { | |
566 | pr_info("csk 0x%p, alloc cpls failed.\n", csk); | |
567 | kfree(csk); | |
568 | return NULL; | |
569 | } | |
570 | ||
571 | spin_lock_init(&csk->lock); | |
572 | kref_init(&csk->refcnt); | |
573 | skb_queue_head_init(&csk->receive_queue); | |
574 | skb_queue_head_init(&csk->write_queue); | |
575 | setup_timer(&csk->retry_timer, NULL, (unsigned long)csk); | |
576 | rwlock_init(&csk->callback_lock); | |
577 | csk->cdev = cdev; | |
578 | csk->flags = 0; | |
579 | cxgbi_sock_set_state(csk, CTP_CLOSED); | |
580 | ||
581 | log_debug(1 << CXGBI_DBG_SOCK, "cdev 0x%p, new csk 0x%p.\n", cdev, csk); | |
582 | ||
583 | return csk; | |
584 | } | |
585 | ||
f4bfd99f DM |
586 | static struct rtable *find_route_ipv4(struct flowi4 *fl4, |
587 | __be32 saddr, __be32 daddr, | |
78fbfd8a | 588 | __be16 sport, __be16 dport, u8 tos) |
9ba682f0 | 589 | { |
590 | struct rtable *rt; | |
9ba682f0 | 591 | |
f4bfd99f | 592 | rt = ip_route_output_ports(&init_net, fl4, NULL, daddr, saddr, |
78fbfd8a | 593 | dport, sport, IPPROTO_TCP, tos, 0); |
b23dd4fe | 594 | if (IS_ERR(rt)) |
9ba682f0 | 595 | return NULL; |
596 | ||
597 | return rt; | |
598 | } | |
599 | ||
600 | static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr) | |
601 | { | |
602 | struct sockaddr_in *daddr = (struct sockaddr_in *)dst_addr; | |
603 | struct dst_entry *dst; | |
604 | struct net_device *ndev; | |
605 | struct cxgbi_device *cdev; | |
606 | struct rtable *rt = NULL; | |
a58b61e5 | 607 | struct neighbour *n; |
f4bfd99f | 608 | struct flowi4 fl4; |
9ba682f0 | 609 | struct cxgbi_sock *csk = NULL; |
610 | unsigned int mtu = 0; | |
611 | int port = 0xFFFF; | |
612 | int err = 0; | |
613 | ||
f4bfd99f | 614 | rt = find_route_ipv4(&fl4, 0, daddr->sin_addr.s_addr, 0, daddr->sin_port, 0); |
9ba682f0 | 615 | if (!rt) { |
616 | pr_info("no route to ipv4 0x%x, port %u.\n", | |
fc8d0590 AB |
617 | be32_to_cpu(daddr->sin_addr.s_addr), |
618 | be16_to_cpu(daddr->sin_port)); | |
9ba682f0 | 619 | err = -ENETUNREACH; |
620 | goto err_out; | |
621 | } | |
622 | dst = &rt->dst; | |
0b399d46 | 623 | n = dst_neigh_lookup(dst, &daddr->sin_addr.s_addr); |
a58b61e5 DM |
624 | if (!n) { |
625 | err = -ENODEV; | |
626 | goto rel_rt; | |
627 | } | |
628 | ndev = n->dev; | |
9ba682f0 | 629 | |
630 | if (rt->rt_flags & (RTCF_MULTICAST | RTCF_BROADCAST)) { | |
631 | pr_info("multi-cast route %pI4, port %u, dev %s.\n", | |
632 | &daddr->sin_addr.s_addr, ntohs(daddr->sin_port), | |
633 | ndev->name); | |
634 | err = -ENETUNREACH; | |
0b399d46 | 635 | goto rel_neigh; |
9ba682f0 | 636 | } |
637 | ||
638 | if (ndev->flags & IFF_LOOPBACK) { | |
639 | ndev = ip_dev_find(&init_net, daddr->sin_addr.s_addr); | |
640 | mtu = ndev->mtu; | |
641 | pr_info("rt dev %s, loopback -> %s, mtu %u.\n", | |
a58b61e5 | 642 | n->dev->name, ndev->name, mtu); |
9ba682f0 | 643 | } |
644 | ||
9ba682f0 | 645 | cdev = cxgbi_device_find_by_netdev(ndev, &port); |
646 | if (!cdev) { | |
647 | pr_info("dst %pI4, %s, NOT cxgbi device.\n", | |
648 | &daddr->sin_addr.s_addr, ndev->name); | |
649 | err = -ENETUNREACH; | |
0b399d46 | 650 | goto rel_neigh; |
9ba682f0 | 651 | } |
652 | log_debug(1 << CXGBI_DBG_SOCK, | |
653 | "route to %pI4 :%u, ndev p#%d,%s, cdev 0x%p.\n", | |
654 | &daddr->sin_addr.s_addr, ntohs(daddr->sin_port), | |
655 | port, ndev->name, cdev); | |
656 | ||
657 | csk = cxgbi_sock_create(cdev); | |
658 | if (!csk) { | |
659 | err = -ENOMEM; | |
0b399d46 | 660 | goto rel_neigh; |
9ba682f0 | 661 | } |
662 | csk->cdev = cdev; | |
663 | csk->port_id = port; | |
664 | csk->mtu = mtu; | |
665 | csk->dst = dst; | |
fc8d0590 AB |
666 | |
667 | csk->csk_family = AF_INET; | |
9ba682f0 | 668 | csk->daddr.sin_addr.s_addr = daddr->sin_addr.s_addr; |
669 | csk->daddr.sin_port = daddr->sin_port; | |
c71b9b66 | 670 | csk->daddr.sin_family = daddr->sin_family; |
fc8d0590 | 671 | csk->saddr.sin_family = daddr->sin_family; |
f4bfd99f | 672 | csk->saddr.sin_addr.s_addr = fl4.saddr; |
0b399d46 | 673 | neigh_release(n); |
9ba682f0 | 674 | |
675 | return csk; | |
676 | ||
0b399d46 DM |
677 | rel_neigh: |
678 | neigh_release(n); | |
679 | ||
9ba682f0 | 680 | rel_rt: |
681 | ip_rt_put(rt); | |
682 | if (csk) | |
683 | cxgbi_sock_closed(csk); | |
684 | err_out: | |
685 | return ERR_PTR(err); | |
686 | } | |
687 | ||
e81fbf6c | 688 | #if IS_ENABLED(CONFIG_IPV6) |
fc8d0590 AB |
689 | static struct rt6_info *find_route_ipv6(const struct in6_addr *saddr, |
690 | const struct in6_addr *daddr) | |
691 | { | |
692 | struct flowi6 fl; | |
693 | ||
3d6d30d6 | 694 | memset(&fl, 0, sizeof(fl)); |
fc8d0590 AB |
695 | if (saddr) |
696 | memcpy(&fl.saddr, saddr, sizeof(struct in6_addr)); | |
697 | if (daddr) | |
698 | memcpy(&fl.daddr, daddr, sizeof(struct in6_addr)); | |
699 | return (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl); | |
700 | } | |
701 | ||
702 | static struct cxgbi_sock *cxgbi_check_route6(struct sockaddr *dst_addr) | |
703 | { | |
704 | struct sockaddr_in6 *daddr6 = (struct sockaddr_in6 *)dst_addr; | |
705 | struct dst_entry *dst; | |
706 | struct net_device *ndev; | |
707 | struct cxgbi_device *cdev; | |
708 | struct rt6_info *rt = NULL; | |
709 | struct neighbour *n; | |
710 | struct in6_addr pref_saddr; | |
711 | struct cxgbi_sock *csk = NULL; | |
712 | unsigned int mtu = 0; | |
713 | int port = 0xFFFF; | |
714 | int err = 0; | |
715 | ||
716 | rt = find_route_ipv6(NULL, &daddr6->sin6_addr); | |
717 | ||
718 | if (!rt) { | |
719 | pr_info("no route to ipv6 %pI6 port %u\n", | |
720 | daddr6->sin6_addr.s6_addr, | |
721 | be16_to_cpu(daddr6->sin6_port)); | |
722 | err = -ENETUNREACH; | |
723 | goto err_out; | |
724 | } | |
725 | ||
726 | dst = &rt->dst; | |
727 | ||
728 | n = dst_neigh_lookup(dst, &daddr6->sin6_addr); | |
729 | ||
730 | if (!n) { | |
731 | pr_info("%pI6, port %u, dst no neighbour.\n", | |
732 | daddr6->sin6_addr.s6_addr, | |
733 | be16_to_cpu(daddr6->sin6_port)); | |
734 | err = -ENETUNREACH; | |
735 | goto rel_rt; | |
736 | } | |
737 | ndev = n->dev; | |
738 | ||
fd0273d7 | 739 | if (ipv6_addr_is_multicast(&daddr6->sin6_addr)) { |
fc8d0590 AB |
740 | pr_info("multi-cast route %pI6 port %u, dev %s.\n", |
741 | daddr6->sin6_addr.s6_addr, | |
742 | ntohs(daddr6->sin6_port), ndev->name); | |
743 | err = -ENETUNREACH; | |
744 | goto rel_rt; | |
745 | } | |
746 | ||
747 | cdev = cxgbi_device_find_by_netdev(ndev, &port); | |
748 | if (!cdev) | |
749 | cdev = cxgbi_device_find_by_mac(ndev, &port); | |
750 | if (!cdev) { | |
751 | pr_info("dst %pI6 %s, NOT cxgbi device.\n", | |
752 | daddr6->sin6_addr.s6_addr, ndev->name); | |
753 | err = -ENETUNREACH; | |
754 | goto rel_rt; | |
755 | } | |
756 | log_debug(1 << CXGBI_DBG_SOCK, | |
757 | "route to %pI6 :%u, ndev p#%d,%s, cdev 0x%p.\n", | |
758 | daddr6->sin6_addr.s6_addr, ntohs(daddr6->sin6_port), port, | |
759 | ndev->name, cdev); | |
760 | ||
761 | csk = cxgbi_sock_create(cdev); | |
762 | if (!csk) { | |
763 | err = -ENOMEM; | |
764 | goto rel_rt; | |
765 | } | |
766 | csk->cdev = cdev; | |
767 | csk->port_id = port; | |
768 | csk->mtu = mtu; | |
769 | csk->dst = dst; | |
770 | ||
771 | if (ipv6_addr_any(&rt->rt6i_prefsrc.addr)) { | |
772 | struct inet6_dev *idev = ip6_dst_idev((struct dst_entry *)rt); | |
773 | ||
774 | err = ipv6_dev_get_saddr(&init_net, idev ? idev->dev : NULL, | |
775 | &daddr6->sin6_addr, 0, &pref_saddr); | |
776 | if (err) { | |
777 | pr_info("failed to get source address to reach %pI6\n", | |
778 | &daddr6->sin6_addr); | |
779 | goto rel_rt; | |
780 | } | |
781 | } else { | |
782 | pref_saddr = rt->rt6i_prefsrc.addr; | |
783 | } | |
784 | ||
785 | csk->csk_family = AF_INET6; | |
786 | csk->daddr6.sin6_addr = daddr6->sin6_addr; | |
787 | csk->daddr6.sin6_port = daddr6->sin6_port; | |
788 | csk->daddr6.sin6_family = daddr6->sin6_family; | |
dd9ad67e | 789 | csk->saddr6.sin6_family = daddr6->sin6_family; |
fc8d0590 AB |
790 | csk->saddr6.sin6_addr = pref_saddr; |
791 | ||
792 | neigh_release(n); | |
793 | return csk; | |
794 | ||
795 | rel_rt: | |
796 | if (n) | |
797 | neigh_release(n); | |
798 | ||
799 | ip6_rt_put(rt); | |
800 | if (csk) | |
801 | cxgbi_sock_closed(csk); | |
802 | err_out: | |
803 | return ERR_PTR(err); | |
804 | } | |
e81fbf6c | 805 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
fc8d0590 | 806 | |
9ba682f0 | 807 | void cxgbi_sock_established(struct cxgbi_sock *csk, unsigned int snd_isn, |
808 | unsigned int opt) | |
809 | { | |
810 | csk->write_seq = csk->snd_nxt = csk->snd_una = snd_isn; | |
811 | dst_confirm(csk->dst); | |
812 | smp_mb(); | |
813 | cxgbi_sock_set_state(csk, CTP_ESTABLISHED); | |
814 | } | |
815 | EXPORT_SYMBOL_GPL(cxgbi_sock_established); | |
816 | ||
817 | static void cxgbi_inform_iscsi_conn_closing(struct cxgbi_sock *csk) | |
818 | { | |
819 | log_debug(1 << CXGBI_DBG_SOCK, | |
820 | "csk 0x%p, state %u, flags 0x%lx, conn 0x%p.\n", | |
821 | csk, csk->state, csk->flags, csk->user_data); | |
822 | ||
823 | if (csk->state != CTP_ESTABLISHED) { | |
e3d2ad8c | 824 | read_lock_bh(&csk->callback_lock); |
9ba682f0 | 825 | if (csk->user_data) |
826 | iscsi_conn_failure(csk->user_data, | |
ee7255ad | 827 | ISCSI_ERR_TCP_CONN_CLOSE); |
e3d2ad8c | 828 | read_unlock_bh(&csk->callback_lock); |
9ba682f0 | 829 | } |
830 | } | |
831 | ||
832 | void cxgbi_sock_closed(struct cxgbi_sock *csk) | |
833 | { | |
834 | log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", | |
835 | csk, (csk)->state, (csk)->flags, (csk)->tid); | |
836 | cxgbi_sock_set_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED); | |
837 | if (csk->state == CTP_ACTIVE_OPEN || csk->state == CTP_CLOSED) | |
838 | return; | |
839 | if (csk->saddr.sin_port) | |
840 | sock_put_port(csk); | |
841 | if (csk->dst) | |
842 | dst_release(csk->dst); | |
843 | csk->cdev->csk_release_offload_resources(csk); | |
844 | cxgbi_sock_set_state(csk, CTP_CLOSED); | |
845 | cxgbi_inform_iscsi_conn_closing(csk); | |
846 | cxgbi_sock_put(csk); | |
847 | } | |
848 | EXPORT_SYMBOL_GPL(cxgbi_sock_closed); | |
849 | ||
850 | static void need_active_close(struct cxgbi_sock *csk) | |
851 | { | |
852 | int data_lost; | |
853 | int close_req = 0; | |
854 | ||
855 | log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", | |
856 | csk, (csk)->state, (csk)->flags, (csk)->tid); | |
857 | spin_lock_bh(&csk->lock); | |
858 | dst_confirm(csk->dst); | |
859 | data_lost = skb_queue_len(&csk->receive_queue); | |
860 | __skb_queue_purge(&csk->receive_queue); | |
861 | ||
862 | if (csk->state == CTP_ACTIVE_OPEN) | |
863 | cxgbi_sock_set_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED); | |
864 | else if (csk->state == CTP_ESTABLISHED) { | |
865 | close_req = 1; | |
866 | cxgbi_sock_set_state(csk, CTP_ACTIVE_CLOSE); | |
867 | } else if (csk->state == CTP_PASSIVE_CLOSE) { | |
868 | close_req = 1; | |
869 | cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_2); | |
870 | } | |
871 | ||
872 | if (close_req) { | |
873 | if (data_lost) | |
874 | csk->cdev->csk_send_abort_req(csk); | |
875 | else | |
876 | csk->cdev->csk_send_close_req(csk); | |
877 | } | |
878 | ||
879 | spin_unlock_bh(&csk->lock); | |
880 | } | |
881 | ||
882 | void cxgbi_sock_fail_act_open(struct cxgbi_sock *csk, int errno) | |
883 | { | |
884 | pr_info("csk 0x%p,%u,%lx, %pI4:%u-%pI4:%u, err %d.\n", | |
885 | csk, csk->state, csk->flags, | |
886 | &csk->saddr.sin_addr.s_addr, csk->saddr.sin_port, | |
887 | &csk->daddr.sin_addr.s_addr, csk->daddr.sin_port, | |
888 | errno); | |
889 | ||
890 | cxgbi_sock_set_state(csk, CTP_CONNECTING); | |
891 | csk->err = errno; | |
892 | cxgbi_sock_closed(csk); | |
893 | } | |
894 | EXPORT_SYMBOL_GPL(cxgbi_sock_fail_act_open); | |
895 | ||
896 | void cxgbi_sock_act_open_req_arp_failure(void *handle, struct sk_buff *skb) | |
897 | { | |
898 | struct cxgbi_sock *csk = (struct cxgbi_sock *)skb->sk; | |
899 | ||
900 | log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", | |
901 | csk, (csk)->state, (csk)->flags, (csk)->tid); | |
902 | cxgbi_sock_get(csk); | |
903 | spin_lock_bh(&csk->lock); | |
904 | if (csk->state == CTP_ACTIVE_OPEN) | |
905 | cxgbi_sock_fail_act_open(csk, -EHOSTUNREACH); | |
906 | spin_unlock_bh(&csk->lock); | |
907 | cxgbi_sock_put(csk); | |
908 | __kfree_skb(skb); | |
909 | } | |
910 | EXPORT_SYMBOL_GPL(cxgbi_sock_act_open_req_arp_failure); | |
911 | ||
912 | void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *csk) | |
913 | { | |
914 | cxgbi_sock_get(csk); | |
915 | spin_lock_bh(&csk->lock); | |
7b07bf24 AB |
916 | |
917 | cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_RCVD); | |
9ba682f0 | 918 | if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { |
7b07bf24 AB |
919 | cxgbi_sock_clear_flag(csk, CTPF_ABORT_RPL_PENDING); |
920 | if (cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) | |
921 | pr_err("csk 0x%p,%u,0x%lx,%u,ABT_RPL_RSS.\n", | |
922 | csk, csk->state, csk->flags, csk->tid); | |
923 | cxgbi_sock_closed(csk); | |
9ba682f0 | 924 | } |
7b07bf24 | 925 | |
9ba682f0 | 926 | spin_unlock_bh(&csk->lock); |
927 | cxgbi_sock_put(csk); | |
928 | } | |
929 | EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_abort_rpl); | |
930 | ||
931 | void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *csk) | |
932 | { | |
933 | log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", | |
934 | csk, (csk)->state, (csk)->flags, (csk)->tid); | |
935 | cxgbi_sock_get(csk); | |
936 | spin_lock_bh(&csk->lock); | |
937 | ||
938 | if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) | |
939 | goto done; | |
940 | ||
941 | switch (csk->state) { | |
942 | case CTP_ESTABLISHED: | |
943 | cxgbi_sock_set_state(csk, CTP_PASSIVE_CLOSE); | |
944 | break; | |
945 | case CTP_ACTIVE_CLOSE: | |
946 | cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_2); | |
947 | break; | |
948 | case CTP_CLOSE_WAIT_1: | |
949 | cxgbi_sock_closed(csk); | |
950 | break; | |
951 | case CTP_ABORTING: | |
952 | break; | |
953 | default: | |
954 | pr_err("csk 0x%p,%u,0x%lx,%u, bad state.\n", | |
955 | csk, csk->state, csk->flags, csk->tid); | |
956 | } | |
957 | cxgbi_inform_iscsi_conn_closing(csk); | |
958 | done: | |
959 | spin_unlock_bh(&csk->lock); | |
960 | cxgbi_sock_put(csk); | |
961 | } | |
962 | EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_peer_close); | |
963 | ||
964 | void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *csk, u32 snd_nxt) | |
965 | { | |
966 | log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", | |
967 | csk, (csk)->state, (csk)->flags, (csk)->tid); | |
968 | cxgbi_sock_get(csk); | |
969 | spin_lock_bh(&csk->lock); | |
970 | ||
971 | csk->snd_una = snd_nxt - 1; | |
972 | if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) | |
973 | goto done; | |
974 | ||
975 | switch (csk->state) { | |
976 | case CTP_ACTIVE_CLOSE: | |
977 | cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_1); | |
978 | break; | |
979 | case CTP_CLOSE_WAIT_1: | |
980 | case CTP_CLOSE_WAIT_2: | |
981 | cxgbi_sock_closed(csk); | |
982 | break; | |
983 | case CTP_ABORTING: | |
984 | break; | |
985 | default: | |
986 | pr_err("csk 0x%p,%u,0x%lx,%u, bad state.\n", | |
987 | csk, csk->state, csk->flags, csk->tid); | |
988 | } | |
989 | done: | |
990 | spin_unlock_bh(&csk->lock); | |
991 | cxgbi_sock_put(csk); | |
992 | } | |
993 | EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_close_conn_rpl); | |
994 | ||
995 | void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *csk, unsigned int credits, | |
996 | unsigned int snd_una, int seq_chk) | |
997 | { | |
998 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
999 | "csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, snd_una %u,%d.\n", | |
1000 | csk, csk->state, csk->flags, csk->tid, credits, | |
1001 | csk->wr_cred, csk->wr_una_cred, snd_una, seq_chk); | |
1002 | ||
1003 | spin_lock_bh(&csk->lock); | |
1004 | ||
1005 | csk->wr_cred += credits; | |
1006 | if (csk->wr_una_cred > csk->wr_max_cred - csk->wr_cred) | |
1007 | csk->wr_una_cred = csk->wr_max_cred - csk->wr_cred; | |
1008 | ||
1009 | while (credits) { | |
1010 | struct sk_buff *p = cxgbi_sock_peek_wr(csk); | |
1011 | ||
1012 | if (unlikely(!p)) { | |
1013 | pr_err("csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, empty.\n", | |
1014 | csk, csk->state, csk->flags, csk->tid, credits, | |
1015 | csk->wr_cred, csk->wr_una_cred); | |
1016 | break; | |
1017 | } | |
1018 | ||
1019 | if (unlikely(credits < p->csum)) { | |
1020 | pr_warn("csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, < %u.\n", | |
1021 | csk, csk->state, csk->flags, csk->tid, | |
1022 | credits, csk->wr_cred, csk->wr_una_cred, | |
1023 | p->csum); | |
1024 | p->csum -= credits; | |
1025 | break; | |
1026 | } else { | |
1027 | cxgbi_sock_dequeue_wr(csk); | |
1028 | credits -= p->csum; | |
1029 | kfree_skb(p); | |
1030 | } | |
1031 | } | |
1032 | ||
1033 | cxgbi_sock_check_wr_invariants(csk); | |
1034 | ||
1035 | if (seq_chk) { | |
1036 | if (unlikely(before(snd_una, csk->snd_una))) { | |
1037 | pr_warn("csk 0x%p,%u,0x%lx,%u, snd_una %u/%u.", | |
1038 | csk, csk->state, csk->flags, csk->tid, snd_una, | |
1039 | csk->snd_una); | |
1040 | goto done; | |
1041 | } | |
1042 | ||
1043 | if (csk->snd_una != snd_una) { | |
1044 | csk->snd_una = snd_una; | |
1045 | dst_confirm(csk->dst); | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | if (skb_queue_len(&csk->write_queue)) { | |
1050 | if (csk->cdev->csk_push_tx_frames(csk, 0)) | |
1051 | cxgbi_conn_tx_open(csk); | |
1052 | } else | |
1053 | cxgbi_conn_tx_open(csk); | |
1054 | done: | |
1055 | spin_unlock_bh(&csk->lock); | |
1056 | } | |
1057 | EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_wr_ack); | |
1058 | ||
1059 | static unsigned int cxgbi_sock_find_best_mtu(struct cxgbi_sock *csk, | |
1060 | unsigned short mtu) | |
1061 | { | |
1062 | int i = 0; | |
1063 | ||
1064 | while (i < csk->cdev->nmtus - 1 && csk->cdev->mtus[i + 1] <= mtu) | |
1065 | ++i; | |
1066 | ||
1067 | return i; | |
1068 | } | |
1069 | ||
1070 | unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *csk, unsigned int pmtu) | |
1071 | { | |
1072 | unsigned int idx; | |
1073 | struct dst_entry *dst = csk->dst; | |
1074 | ||
0dbaee3b | 1075 | csk->advmss = dst_metric_advmss(dst); |
9ba682f0 | 1076 | |
1077 | if (csk->advmss > pmtu - 40) | |
1078 | csk->advmss = pmtu - 40; | |
1079 | if (csk->advmss < csk->cdev->mtus[0] - 40) | |
1080 | csk->advmss = csk->cdev->mtus[0] - 40; | |
1081 | idx = cxgbi_sock_find_best_mtu(csk, csk->advmss + 40); | |
1082 | ||
1083 | return idx; | |
1084 | } | |
1085 | EXPORT_SYMBOL_GPL(cxgbi_sock_select_mss); | |
1086 | ||
1087 | void cxgbi_sock_skb_entail(struct cxgbi_sock *csk, struct sk_buff *skb) | |
1088 | { | |
1089 | cxgbi_skcb_tcp_seq(skb) = csk->write_seq; | |
1090 | __skb_queue_tail(&csk->write_queue, skb); | |
1091 | } | |
1092 | EXPORT_SYMBOL_GPL(cxgbi_sock_skb_entail); | |
1093 | ||
1094 | void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *csk) | |
1095 | { | |
1096 | struct sk_buff *skb; | |
1097 | ||
1098 | while ((skb = cxgbi_sock_dequeue_wr(csk)) != NULL) | |
1099 | kfree_skb(skb); | |
1100 | } | |
1101 | EXPORT_SYMBOL_GPL(cxgbi_sock_purge_wr_queue); | |
1102 | ||
1103 | void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *csk) | |
1104 | { | |
1105 | int pending = cxgbi_sock_count_pending_wrs(csk); | |
1106 | ||
1107 | if (unlikely(csk->wr_cred + pending != csk->wr_max_cred)) | |
1108 | pr_err("csk 0x%p, tid %u, credit %u + %u != %u.\n", | |
1109 | csk, csk->tid, csk->wr_cred, pending, csk->wr_max_cred); | |
1110 | } | |
1111 | EXPORT_SYMBOL_GPL(cxgbi_sock_check_wr_invariants); | |
1112 | ||
1113 | static int cxgbi_sock_send_pdus(struct cxgbi_sock *csk, struct sk_buff *skb) | |
1114 | { | |
1115 | struct cxgbi_device *cdev = csk->cdev; | |
1116 | struct sk_buff *next; | |
1117 | int err, copied = 0; | |
1118 | ||
1119 | spin_lock_bh(&csk->lock); | |
1120 | ||
1121 | if (csk->state != CTP_ESTABLISHED) { | |
1122 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
1123 | "csk 0x%p,%u,0x%lx,%u, EAGAIN.\n", | |
1124 | csk, csk->state, csk->flags, csk->tid); | |
1125 | err = -EAGAIN; | |
1126 | goto out_err; | |
1127 | } | |
1128 | ||
1129 | if (csk->err) { | |
1130 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
1131 | "csk 0x%p,%u,0x%lx,%u, EPIPE %d.\n", | |
1132 | csk, csk->state, csk->flags, csk->tid, csk->err); | |
1133 | err = -EPIPE; | |
1134 | goto out_err; | |
1135 | } | |
1136 | ||
81daf10c | 1137 | if (csk->write_seq - csk->snd_una >= csk->snd_win) { |
9ba682f0 | 1138 | log_debug(1 << CXGBI_DBG_PDU_TX, |
1139 | "csk 0x%p,%u,0x%lx,%u, FULL %u-%u >= %u.\n", | |
1140 | csk, csk->state, csk->flags, csk->tid, csk->write_seq, | |
81daf10c | 1141 | csk->snd_una, csk->snd_win); |
9ba682f0 | 1142 | err = -ENOBUFS; |
1143 | goto out_err; | |
1144 | } | |
1145 | ||
1146 | while (skb) { | |
1147 | int frags = skb_shinfo(skb)->nr_frags + | |
1148 | (skb->len != skb->data_len); | |
1149 | ||
1150 | if (unlikely(skb_headroom(skb) < cdev->skb_tx_rsvd)) { | |
1151 | pr_err("csk 0x%p, skb head %u < %u.\n", | |
1152 | csk, skb_headroom(skb), cdev->skb_tx_rsvd); | |
1153 | err = -EINVAL; | |
1154 | goto out_err; | |
1155 | } | |
1156 | ||
1157 | if (frags >= SKB_WR_LIST_SIZE) { | |
1158 | pr_err("csk 0x%p, frags %d, %u,%u >%u.\n", | |
1159 | csk, skb_shinfo(skb)->nr_frags, skb->len, | |
1160 | skb->data_len, (uint)(SKB_WR_LIST_SIZE)); | |
1161 | err = -EINVAL; | |
1162 | goto out_err; | |
1163 | } | |
1164 | ||
1165 | next = skb->next; | |
1166 | skb->next = NULL; | |
1167 | cxgbi_skcb_set_flag(skb, SKCBF_TX_NEED_HDR); | |
1168 | cxgbi_sock_skb_entail(csk, skb); | |
1169 | copied += skb->len; | |
1170 | csk->write_seq += skb->len + | |
1171 | cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); | |
1172 | skb = next; | |
1173 | } | |
1174 | done: | |
1175 | if (likely(skb_queue_len(&csk->write_queue))) | |
1176 | cdev->csk_push_tx_frames(csk, 1); | |
1177 | spin_unlock_bh(&csk->lock); | |
1178 | return copied; | |
1179 | ||
1180 | out_err: | |
1181 | if (copied == 0 && err == -EPIPE) | |
1182 | copied = csk->err ? csk->err : -EPIPE; | |
1183 | else | |
1184 | copied = err; | |
1185 | goto done; | |
1186 | } | |
1187 | ||
71f7a00b VP |
1188 | static inline void |
1189 | scmd_get_params(struct scsi_cmnd *sc, struct scatterlist **sgl, | |
1190 | unsigned int *sgcnt, unsigned int *dlen, | |
1191 | unsigned int prot) | |
1192 | { | |
1193 | struct scsi_data_buffer *sdb = prot ? scsi_prot(sc) : scsi_out(sc); | |
1194 | ||
1195 | *sgl = sdb->table.sgl; | |
1196 | *sgcnt = sdb->table.nents; | |
1197 | *dlen = sdb->length; | |
1198 | /* Caution: for protection sdb, sdb->length is invalid */ | |
1199 | } | |
1200 | ||
1201 | void cxgbi_ddp_set_one_ppod(struct cxgbi_pagepod *ppod, | |
1202 | struct cxgbi_task_tag_info *ttinfo, | |
1203 | struct scatterlist **sg_pp, unsigned int *sg_off) | |
1204 | { | |
1205 | struct scatterlist *sg = sg_pp ? *sg_pp : NULL; | |
1206 | unsigned int offset = sg_off ? *sg_off : 0; | |
1207 | dma_addr_t addr = 0UL; | |
1208 | unsigned int len = 0; | |
1209 | int i; | |
1210 | ||
1211 | memcpy(ppod, &ttinfo->hdr, sizeof(struct cxgbi_pagepod_hdr)); | |
1212 | ||
1213 | if (sg) { | |
1214 | addr = sg_dma_address(sg); | |
1215 | len = sg_dma_len(sg); | |
1216 | } | |
1217 | ||
1218 | for (i = 0; i < PPOD_PAGES_MAX; i++) { | |
1219 | if (sg) { | |
1220 | ppod->addr[i] = cpu_to_be64(addr + offset); | |
1221 | offset += PAGE_SIZE; | |
1222 | if (offset == (len + sg->offset)) { | |
1223 | offset = 0; | |
1224 | sg = sg_next(sg); | |
1225 | if (sg) { | |
1226 | addr = sg_dma_address(sg); | |
1227 | len = sg_dma_len(sg); | |
1228 | } | |
1229 | } | |
1230 | } else { | |
1231 | ppod->addr[i] = 0ULL; | |
1232 | } | |
1233 | } | |
1234 | ||
1235 | /* | |
1236 | * the fifth address needs to be repeated in the next ppod, so do | |
1237 | * not move sg | |
1238 | */ | |
1239 | if (sg_pp) { | |
1240 | *sg_pp = sg; | |
1241 | *sg_off = offset; | |
1242 | } | |
1243 | ||
1244 | if (offset == len) { | |
1245 | offset = 0; | |
1246 | sg = sg_next(sg); | |
1247 | if (sg) { | |
1248 | addr = sg_dma_address(sg); | |
1249 | len = sg_dma_len(sg); | |
1250 | } | |
1251 | } | |
1252 | ppod->addr[i] = sg ? cpu_to_be64(addr + offset) : 0ULL; | |
1253 | } | |
1254 | EXPORT_SYMBOL_GPL(cxgbi_ddp_set_one_ppod); | |
1255 | ||
9ba682f0 | 1256 | /* |
1257 | * APIs interacting with open-iscsi libraries | |
1258 | */ | |
1259 | ||
1260 | static unsigned char padding[4]; | |
1261 | ||
71f7a00b VP |
1262 | void cxgbi_ddp_ppm_setup(void **ppm_pp, struct cxgbi_device *cdev, |
1263 | struct cxgbi_tag_format *tformat, unsigned int ppmax, | |
1264 | unsigned int llimit, unsigned int start, | |
1265 | unsigned int rsvd_factor) | |
1266 | { | |
1267 | int err = cxgbi_ppm_init(ppm_pp, cdev->ports[0], cdev->pdev, | |
1268 | cdev->lldev, tformat, ppmax, llimit, start, | |
1269 | rsvd_factor); | |
1270 | ||
1271 | if (err >= 0) { | |
1272 | struct cxgbi_ppm *ppm = (struct cxgbi_ppm *)(*ppm_pp); | |
1273 | ||
1274 | if (ppm->ppmax < 1024 || | |
1275 | ppm->tformat.pgsz_idx_dflt >= DDP_PGIDX_MAX) | |
1276 | cdev->flags |= CXGBI_FLAG_DDP_OFF; | |
1277 | err = 0; | |
1278 | } else { | |
1279 | cdev->flags |= CXGBI_FLAG_DDP_OFF; | |
1280 | } | |
1281 | } | |
1282 | EXPORT_SYMBOL_GPL(cxgbi_ddp_ppm_setup); | |
1283 | ||
1284 | static int cxgbi_ddp_sgl_check(struct scatterlist *sgl, int nents) | |
1285 | { | |
1286 | int i; | |
1287 | int last_sgidx = nents - 1; | |
1288 | struct scatterlist *sg = sgl; | |
1289 | ||
1290 | for (i = 0; i < nents; i++, sg = sg_next(sg)) { | |
1291 | unsigned int len = sg->length + sg->offset; | |
1292 | ||
1293 | if ((sg->offset & 0x3) || (i && sg->offset) || | |
1294 | ((i != last_sgidx) && len != PAGE_SIZE)) { | |
1295 | log_debug(1 << CXGBI_DBG_DDP, | |
1296 | "sg %u/%u, %u,%u, not aligned.\n", | |
1297 | i, nents, sg->offset, sg->length); | |
1298 | goto err_out; | |
1299 | } | |
1300 | } | |
1301 | return 0; | |
1302 | err_out: | |
1303 | return -EINVAL; | |
1304 | } | |
1305 | ||
1306 | static int cxgbi_ddp_reserve(struct cxgbi_conn *cconn, | |
1307 | struct cxgbi_task_data *tdata, u32 sw_tag, | |
1308 | unsigned int xferlen) | |
1309 | { | |
1310 | struct cxgbi_sock *csk = cconn->cep->csk; | |
1311 | struct cxgbi_device *cdev = csk->cdev; | |
1312 | struct cxgbi_ppm *ppm = cdev->cdev2ppm(cdev); | |
1313 | struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo; | |
1314 | struct scatterlist *sgl = ttinfo->sgl; | |
1315 | unsigned int sgcnt = ttinfo->nents; | |
1316 | unsigned int sg_offset = sgl->offset; | |
1317 | int err; | |
1318 | ||
1319 | if (cdev->flags & CXGBI_FLAG_DDP_OFF) { | |
1320 | log_debug(1 << CXGBI_DBG_DDP, | |
1321 | "cdev 0x%p DDP off.\n", cdev); | |
1322 | return -EINVAL; | |
1323 | } | |
1324 | ||
1325 | if (!ppm || xferlen < DDP_THRESHOLD || !sgcnt || | |
1326 | ppm->tformat.pgsz_idx_dflt >= DDP_PGIDX_MAX) { | |
1327 | log_debug(1 << CXGBI_DBG_DDP, | |
1328 | "ppm 0x%p, pgidx %u, xfer %u, sgcnt %u, NO ddp.\n", | |
1329 | ppm, ppm ? ppm->tformat.pgsz_idx_dflt : DDP_PGIDX_MAX, | |
1330 | xferlen, ttinfo->nents); | |
1331 | return -EINVAL; | |
1332 | } | |
1333 | ||
1334 | /* make sure the buffer is suitable for ddp */ | |
1335 | if (cxgbi_ddp_sgl_check(sgl, sgcnt) < 0) | |
1336 | return -EINVAL; | |
1337 | ||
1338 | ttinfo->nr_pages = (xferlen + sgl->offset + (1 << PAGE_SHIFT) - 1) >> | |
1339 | PAGE_SHIFT; | |
1340 | ||
1341 | /* | |
1342 | * the ddp tag will be used for the itt in the outgoing pdu, | |
1343 | * the itt genrated by libiscsi is saved in the ppm and can be | |
1344 | * retrieved via the ddp tag | |
1345 | */ | |
1346 | err = cxgbi_ppm_ppods_reserve(ppm, ttinfo->nr_pages, 0, &ttinfo->idx, | |
1347 | &ttinfo->tag, (unsigned long)sw_tag); | |
1348 | if (err < 0) { | |
1349 | cconn->ddp_full++; | |
1350 | return err; | |
1351 | } | |
1352 | ttinfo->npods = err; | |
1353 | ||
1354 | /* setup dma from scsi command sgl */ | |
1355 | sgl->offset = 0; | |
1356 | err = dma_map_sg(&ppm->pdev->dev, sgl, sgcnt, DMA_FROM_DEVICE); | |
1357 | sgl->offset = sg_offset; | |
1358 | if (err == 0) { | |
1359 | pr_info("%s: 0x%x, xfer %u, sgl %u dma mapping err.\n", | |
1360 | __func__, sw_tag, xferlen, sgcnt); | |
1361 | goto rel_ppods; | |
1362 | } | |
1363 | if (err != ttinfo->nr_pages) { | |
1364 | log_debug(1 << CXGBI_DBG_DDP, | |
1365 | "%s: sw tag 0x%x, xfer %u, sgl %u, dma count %d.\n", | |
1366 | __func__, sw_tag, xferlen, sgcnt, err); | |
1367 | } | |
1368 | ||
1369 | ttinfo->flags |= CXGBI_PPOD_INFO_FLAG_MAPPED; | |
1370 | ttinfo->cid = csk->port_id; | |
1371 | ||
1372 | cxgbi_ppm_make_ppod_hdr(ppm, ttinfo->tag, csk->tid, sgl->offset, | |
1373 | xferlen, &ttinfo->hdr); | |
1374 | ||
1375 | if (cdev->flags & CXGBI_FLAG_USE_PPOD_OFLDQ) { | |
1376 | /* write ppod from xmit_pdu (of iscsi_scsi_command pdu) */ | |
1377 | ttinfo->flags |= CXGBI_PPOD_INFO_FLAG_VALID; | |
1378 | } else { | |
1379 | /* write ppod from control queue now */ | |
1380 | err = cdev->csk_ddp_set_map(ppm, csk, ttinfo); | |
1381 | if (err < 0) | |
1382 | goto rel_ppods; | |
1383 | } | |
1384 | ||
1385 | return 0; | |
1386 | ||
1387 | rel_ppods: | |
1388 | cxgbi_ppm_ppod_release(ppm, ttinfo->idx); | |
1389 | ||
1390 | if (ttinfo->flags & CXGBI_PPOD_INFO_FLAG_MAPPED) { | |
1391 | ttinfo->flags &= ~CXGBI_PPOD_INFO_FLAG_MAPPED; | |
1392 | dma_unmap_sg(&ppm->pdev->dev, sgl, sgcnt, DMA_FROM_DEVICE); | |
1393 | } | |
1394 | return -EINVAL; | |
1395 | } | |
1396 | ||
9ba682f0 | 1397 | static void task_release_itt(struct iscsi_task *task, itt_t hdr_itt) |
1398 | { | |
71f7a00b VP |
1399 | struct scsi_cmnd *sc = task->sc; |
1400 | struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data; | |
1401 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
1402 | struct cxgbi_device *cdev = cconn->chba->cdev; | |
1403 | struct cxgbi_ppm *ppm = cdev->cdev2ppm(cdev); | |
1404 | u32 tag = ntohl((__force u32)hdr_itt); | |
1405 | ||
1406 | log_debug(1 << CXGBI_DBG_DDP, | |
1407 | "cdev 0x%p, task 0x%p, release tag 0x%x.\n", | |
1408 | cdev, task, tag); | |
1409 | if (sc && | |
1410 | (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE) && | |
1411 | cxgbi_ppm_is_ddp_tag(ppm, tag)) { | |
1412 | struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); | |
1413 | struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo; | |
1414 | ||
1415 | if (!(cdev->flags & CXGBI_FLAG_USE_PPOD_OFLDQ)) | |
1416 | cdev->csk_ddp_clear_map(cdev, ppm, ttinfo); | |
1417 | cxgbi_ppm_ppod_release(ppm, ttinfo->idx); | |
1418 | dma_unmap_sg(&ppm->pdev->dev, ttinfo->sgl, ttinfo->nents, | |
1419 | DMA_FROM_DEVICE); | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | static inline u32 cxgbi_build_sw_tag(u32 idx, u32 age) | |
1424 | { | |
1425 | /* assume idx and age both are < 0x7FFF (32767) */ | |
1426 | return (idx << 16) | age; | |
9ba682f0 | 1427 | } |
1428 | ||
1429 | static int task_reserve_itt(struct iscsi_task *task, itt_t *hdr_itt) | |
1430 | { | |
71f7a00b VP |
1431 | struct scsi_cmnd *sc = task->sc; |
1432 | struct iscsi_conn *conn = task->conn; | |
1433 | struct iscsi_session *sess = conn->session; | |
1434 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
1435 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
1436 | struct cxgbi_device *cdev = cconn->chba->cdev; | |
1437 | struct cxgbi_ppm *ppm = cdev->cdev2ppm(cdev); | |
1438 | u32 sw_tag = cxgbi_build_sw_tag(task->itt, sess->age); | |
1439 | u32 tag = 0; | |
1440 | int err = -EINVAL; | |
1441 | ||
1442 | if (sc && | |
1443 | (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE) | |
1444 | ) { | |
1445 | struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); | |
1446 | struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo; | |
1447 | ||
1448 | scmd_get_params(sc, &ttinfo->sgl, &ttinfo->nents, | |
1449 | &tdata->dlen, 0); | |
1450 | err = cxgbi_ddp_reserve(cconn, tdata, sw_tag, tdata->dlen); | |
1451 | if (!err) | |
1452 | tag = ttinfo->tag; | |
1453 | else | |
1454 | log_debug(1 << CXGBI_DBG_DDP, | |
1455 | "csk 0x%p, R task 0x%p, %u,%u, no ddp.\n", | |
1456 | cconn->cep->csk, task, tdata->dlen, | |
1457 | ttinfo->nents); | |
1458 | } | |
1459 | ||
1460 | if (err < 0) { | |
1461 | err = cxgbi_ppm_make_non_ddp_tag(ppm, sw_tag, &tag); | |
1462 | if (err < 0) | |
1463 | return err; | |
1464 | } | |
1465 | /* the itt need to sent in big-endian order */ | |
1466 | *hdr_itt = (__force itt_t)htonl(tag); | |
1467 | ||
1468 | log_debug(1 << CXGBI_DBG_DDP, | |
1469 | "cdev 0x%p, task 0x%p, 0x%x(0x%x,0x%x)->0x%x/0x%x.\n", | |
1470 | cdev, task, sw_tag, task->itt, sess->age, tag, *hdr_itt); | |
9ba682f0 | 1471 | return 0; |
1472 | } | |
1473 | ||
1474 | void cxgbi_parse_pdu_itt(struct iscsi_conn *conn, itt_t itt, int *idx, int *age) | |
1475 | { | |
71f7a00b VP |
1476 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
1477 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
1478 | struct cxgbi_device *cdev = cconn->chba->cdev; | |
1479 | struct cxgbi_ppm *ppm = cdev->cdev2ppm(cdev); | |
1480 | u32 tag = ntohl((__force u32)itt); | |
1481 | u32 sw_bits; | |
1482 | ||
1483 | if (ppm) { | |
1484 | if (cxgbi_ppm_is_ddp_tag(ppm, tag)) | |
1485 | sw_bits = cxgbi_ppm_get_tag_caller_data(ppm, tag); | |
1486 | else | |
1487 | sw_bits = cxgbi_ppm_decode_non_ddp_tag(ppm, tag); | |
1488 | } else { | |
1489 | sw_bits = tag; | |
1490 | } | |
1491 | ||
1492 | cxgbi_decode_sw_tag(sw_bits, idx, age); | |
1493 | log_debug(1 << CXGBI_DBG_DDP, | |
1494 | "cdev 0x%p, tag 0x%x/0x%x, -> 0x%x(0x%x,0x%x).\n", | |
1495 | cdev, tag, itt, sw_bits, idx ? *idx : 0xFFFFF, | |
1496 | age ? *age : 0xFF); | |
9ba682f0 | 1497 | } |
1498 | EXPORT_SYMBOL_GPL(cxgbi_parse_pdu_itt); | |
1499 | ||
1500 | void cxgbi_conn_tx_open(struct cxgbi_sock *csk) | |
1501 | { | |
1502 | struct iscsi_conn *conn = csk->user_data; | |
1503 | ||
1504 | if (conn) { | |
1505 | log_debug(1 << CXGBI_DBG_SOCK, | |
1506 | "csk 0x%p, cid %d.\n", csk, conn->id); | |
1507 | iscsi_conn_queue_work(conn); | |
1508 | } | |
1509 | } | |
1510 | EXPORT_SYMBOL_GPL(cxgbi_conn_tx_open); | |
1511 | ||
1512 | /* | |
1513 | * pdu receive, interact with libiscsi_tcp | |
1514 | */ | |
1515 | static inline int read_pdu_skb(struct iscsi_conn *conn, | |
1516 | struct sk_buff *skb, | |
1517 | unsigned int offset, | |
1518 | int offloaded) | |
1519 | { | |
1520 | int status = 0; | |
1521 | int bytes_read; | |
1522 | ||
1523 | bytes_read = iscsi_tcp_recv_skb(conn, skb, offset, offloaded, &status); | |
1524 | switch (status) { | |
1525 | case ISCSI_TCP_CONN_ERR: | |
1526 | pr_info("skb 0x%p, off %u, %d, TCP_ERR.\n", | |
1527 | skb, offset, offloaded); | |
1528 | return -EIO; | |
1529 | case ISCSI_TCP_SUSPENDED: | |
1530 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1531 | "skb 0x%p, off %u, %d, TCP_SUSPEND, rc %d.\n", | |
1532 | skb, offset, offloaded, bytes_read); | |
1533 | /* no transfer - just have caller flush queue */ | |
1534 | return bytes_read; | |
1535 | case ISCSI_TCP_SKB_DONE: | |
1536 | pr_info("skb 0x%p, off %u, %d, TCP_SKB_DONE.\n", | |
1537 | skb, offset, offloaded); | |
1538 | /* | |
1539 | * pdus should always fit in the skb and we should get | |
1540 | * segment done notifcation. | |
1541 | */ | |
1542 | iscsi_conn_printk(KERN_ERR, conn, "Invalid pdu or skb."); | |
1543 | return -EFAULT; | |
1544 | case ISCSI_TCP_SEGMENT_DONE: | |
1545 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1546 | "skb 0x%p, off %u, %d, TCP_SEG_DONE, rc %d.\n", | |
1547 | skb, offset, offloaded, bytes_read); | |
1548 | return bytes_read; | |
1549 | default: | |
1550 | pr_info("skb 0x%p, off %u, %d, invalid status %d.\n", | |
1551 | skb, offset, offloaded, status); | |
1552 | return -EINVAL; | |
1553 | } | |
1554 | } | |
1555 | ||
1556 | static int skb_read_pdu_bhs(struct iscsi_conn *conn, struct sk_buff *skb) | |
1557 | { | |
1558 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
1559 | ||
1560 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1561 | "conn 0x%p, skb 0x%p, len %u, flag 0x%lx.\n", | |
1562 | conn, skb, skb->len, cxgbi_skcb_flags(skb)); | |
1563 | ||
1564 | if (!iscsi_tcp_recv_segment_is_hdr(tcp_conn)) { | |
1565 | pr_info("conn 0x%p, skb 0x%p, not hdr.\n", conn, skb); | |
1566 | iscsi_conn_failure(conn, ISCSI_ERR_PROTO); | |
1567 | return -EIO; | |
1568 | } | |
1569 | ||
1570 | if (conn->hdrdgst_en && | |
1571 | cxgbi_skcb_test_flag(skb, SKCBF_RX_HCRC_ERR)) { | |
1572 | pr_info("conn 0x%p, skb 0x%p, hcrc.\n", conn, skb); | |
1573 | iscsi_conn_failure(conn, ISCSI_ERR_HDR_DGST); | |
1574 | return -EIO; | |
1575 | } | |
1576 | ||
44830d8f VP |
1577 | if (cxgbi_skcb_test_flag(skb, SKCBF_RX_ISCSI_COMPL) && |
1578 | cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA_DDPD)) { | |
1579 | /* If completion flag is set and data is directly | |
1580 | * placed in to the host memory then update | |
1581 | * task->exp_datasn to the datasn in completion | |
1582 | * iSCSI hdr as T6 adapter generates completion only | |
1583 | * for the last pdu of a sequence. | |
1584 | */ | |
1585 | itt_t itt = ((struct iscsi_data *)skb->data)->itt; | |
1586 | struct iscsi_task *task = iscsi_itt_to_ctask(conn, itt); | |
1587 | u32 data_sn = be32_to_cpu(((struct iscsi_data *) | |
1588 | skb->data)->datasn); | |
1589 | if (task && task->sc) { | |
1590 | struct iscsi_tcp_task *tcp_task = task->dd_data; | |
1591 | ||
1592 | tcp_task->exp_datasn = data_sn; | |
1593 | } | |
1594 | } | |
1595 | ||
9ba682f0 | 1596 | return read_pdu_skb(conn, skb, 0, 0); |
1597 | } | |
1598 | ||
1599 | static int skb_read_pdu_data(struct iscsi_conn *conn, struct sk_buff *lskb, | |
1600 | struct sk_buff *skb, unsigned int offset) | |
1601 | { | |
1602 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
1603 | bool offloaded = 0; | |
1604 | int opcode = tcp_conn->in.hdr->opcode & ISCSI_OPCODE_MASK; | |
1605 | ||
1606 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1607 | "conn 0x%p, skb 0x%p, len %u, flag 0x%lx.\n", | |
1608 | conn, skb, skb->len, cxgbi_skcb_flags(skb)); | |
1609 | ||
1610 | if (conn->datadgst_en && | |
1611 | cxgbi_skcb_test_flag(lskb, SKCBF_RX_DCRC_ERR)) { | |
1612 | pr_info("conn 0x%p, skb 0x%p, dcrc 0x%lx.\n", | |
1613 | conn, lskb, cxgbi_skcb_flags(lskb)); | |
1614 | iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST); | |
1615 | return -EIO; | |
1616 | } | |
1617 | ||
1618 | if (iscsi_tcp_recv_segment_is_hdr(tcp_conn)) | |
1619 | return 0; | |
1620 | ||
1621 | /* coalesced, add header digest length */ | |
1622 | if (lskb == skb && conn->hdrdgst_en) | |
1623 | offset += ISCSI_DIGEST_SIZE; | |
1624 | ||
1625 | if (cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA_DDPD)) | |
1626 | offloaded = 1; | |
1627 | ||
1628 | if (opcode == ISCSI_OP_SCSI_DATA_IN) | |
1629 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1630 | "skb 0x%p, op 0x%x, itt 0x%x, %u %s ddp'ed.\n", | |
1631 | skb, opcode, ntohl(tcp_conn->in.hdr->itt), | |
1632 | tcp_conn->in.datalen, offloaded ? "is" : "not"); | |
1633 | ||
1634 | return read_pdu_skb(conn, skb, offset, offloaded); | |
1635 | } | |
1636 | ||
1637 | static void csk_return_rx_credits(struct cxgbi_sock *csk, int copied) | |
1638 | { | |
1639 | struct cxgbi_device *cdev = csk->cdev; | |
1640 | int must_send; | |
1641 | u32 credits; | |
1642 | ||
1643 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
fc385045 | 1644 | "csk 0x%p,%u,0x%lx,%u, seq %u, wup %u, thre %u, %u.\n", |
9ba682f0 | 1645 | csk, csk->state, csk->flags, csk->tid, csk->copied_seq, |
1646 | csk->rcv_wup, cdev->rx_credit_thres, | |
81daf10c | 1647 | csk->rcv_win); |
9ba682f0 | 1648 | |
586be7cb VP |
1649 | if (!cdev->rx_credit_thres) |
1650 | return; | |
1651 | ||
9ba682f0 | 1652 | if (csk->state != CTP_ESTABLISHED) |
1653 | return; | |
1654 | ||
1655 | credits = csk->copied_seq - csk->rcv_wup; | |
1656 | if (unlikely(!credits)) | |
1657 | return; | |
81daf10c | 1658 | must_send = credits + 16384 >= csk->rcv_win; |
9ba682f0 | 1659 | if (must_send || credits >= cdev->rx_credit_thres) |
1660 | csk->rcv_wup += cdev->csk_send_rx_credits(csk, credits); | |
1661 | } | |
1662 | ||
1663 | void cxgbi_conn_pdu_ready(struct cxgbi_sock *csk) | |
1664 | { | |
1665 | struct cxgbi_device *cdev = csk->cdev; | |
1666 | struct iscsi_conn *conn = csk->user_data; | |
1667 | struct sk_buff *skb; | |
1668 | unsigned int read = 0; | |
1669 | int err = 0; | |
1670 | ||
1671 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1672 | "csk 0x%p, conn 0x%p.\n", csk, conn); | |
1673 | ||
1674 | if (unlikely(!conn || conn->suspend_rx)) { | |
1675 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1676 | "csk 0x%p, conn 0x%p, id %d, suspend_rx %lu!\n", | |
1677 | csk, conn, conn ? conn->id : 0xFF, | |
1678 | conn ? conn->suspend_rx : 0xFF); | |
9ba682f0 | 1679 | return; |
1680 | } | |
1681 | ||
1682 | while (!err) { | |
9ba682f0 | 1683 | skb = skb_peek(&csk->receive_queue); |
1684 | if (!skb || | |
1685 | !(cxgbi_skcb_test_flag(skb, SKCBF_RX_STATUS))) { | |
1686 | if (skb) | |
1687 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1688 | "skb 0x%p, NOT ready 0x%lx.\n", | |
1689 | skb, cxgbi_skcb_flags(skb)); | |
9ba682f0 | 1690 | break; |
1691 | } | |
1692 | __skb_unlink(skb, &csk->receive_queue); | |
9ba682f0 | 1693 | |
1694 | read += cxgbi_skcb_rx_pdulen(skb); | |
1695 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1696 | "csk 0x%p, skb 0x%p,%u,f 0x%lx, pdu len %u.\n", | |
1697 | csk, skb, skb->len, cxgbi_skcb_flags(skb), | |
1698 | cxgbi_skcb_rx_pdulen(skb)); | |
1699 | ||
1700 | if (cxgbi_skcb_test_flag(skb, SKCBF_RX_COALESCED)) { | |
1701 | err = skb_read_pdu_bhs(conn, skb); | |
e3d2ad8c | 1702 | if (err < 0) { |
1703 | pr_err("coalesced bhs, csk 0x%p, skb 0x%p,%u, " | |
1704 | "f 0x%lx, plen %u.\n", | |
1705 | csk, skb, skb->len, | |
1706 | cxgbi_skcb_flags(skb), | |
1707 | cxgbi_skcb_rx_pdulen(skb)); | |
1708 | goto skb_done; | |
1709 | } | |
9ba682f0 | 1710 | err = skb_read_pdu_data(conn, skb, skb, |
1711 | err + cdev->skb_rx_extra); | |
e3d2ad8c | 1712 | if (err < 0) |
1713 | pr_err("coalesced data, csk 0x%p, skb 0x%p,%u, " | |
1714 | "f 0x%lx, plen %u.\n", | |
1715 | csk, skb, skb->len, | |
1716 | cxgbi_skcb_flags(skb), | |
1717 | cxgbi_skcb_rx_pdulen(skb)); | |
9ba682f0 | 1718 | } else { |
1719 | err = skb_read_pdu_bhs(conn, skb); | |
e3d2ad8c | 1720 | if (err < 0) { |
1721 | pr_err("bhs, csk 0x%p, skb 0x%p,%u, " | |
1722 | "f 0x%lx, plen %u.\n", | |
1723 | csk, skb, skb->len, | |
1724 | cxgbi_skcb_flags(skb), | |
1725 | cxgbi_skcb_rx_pdulen(skb)); | |
1726 | goto skb_done; | |
1727 | } | |
1728 | ||
9ba682f0 | 1729 | if (cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) { |
1730 | struct sk_buff *dskb; | |
1731 | ||
9ba682f0 | 1732 | dskb = skb_peek(&csk->receive_queue); |
1733 | if (!dskb) { | |
e3d2ad8c | 1734 | pr_err("csk 0x%p, skb 0x%p,%u, f 0x%lx," |
1735 | " plen %u, NO data.\n", | |
1736 | csk, skb, skb->len, | |
1737 | cxgbi_skcb_flags(skb), | |
1738 | cxgbi_skcb_rx_pdulen(skb)); | |
1739 | err = -EIO; | |
1740 | goto skb_done; | |
9ba682f0 | 1741 | } |
1742 | __skb_unlink(dskb, &csk->receive_queue); | |
9ba682f0 | 1743 | |
1744 | err = skb_read_pdu_data(conn, skb, dskb, 0); | |
e3d2ad8c | 1745 | if (err < 0) |
1746 | pr_err("data, csk 0x%p, skb 0x%p,%u, " | |
1747 | "f 0x%lx, plen %u, dskb 0x%p," | |
1748 | "%u.\n", | |
1749 | csk, skb, skb->len, | |
1750 | cxgbi_skcb_flags(skb), | |
1751 | cxgbi_skcb_rx_pdulen(skb), | |
1752 | dskb, dskb->len); | |
9ba682f0 | 1753 | __kfree_skb(dskb); |
1754 | } else | |
1755 | err = skb_read_pdu_data(conn, skb, skb, 0); | |
1756 | } | |
e3d2ad8c | 1757 | skb_done: |
1758 | __kfree_skb(skb); | |
1759 | ||
9ba682f0 | 1760 | if (err < 0) |
1761 | break; | |
9ba682f0 | 1762 | } |
1763 | ||
1764 | log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, read %u.\n", csk, read); | |
1765 | if (read) { | |
1766 | csk->copied_seq += read; | |
1767 | csk_return_rx_credits(csk, read); | |
1768 | conn->rxdata_octets += read; | |
1769 | } | |
1770 | ||
1771 | if (err < 0) { | |
e3d2ad8c | 1772 | pr_info("csk 0x%p, 0x%p, rx failed %d, read %u.\n", |
1773 | csk, conn, err, read); | |
9ba682f0 | 1774 | iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); |
1775 | } | |
1776 | } | |
1777 | EXPORT_SYMBOL_GPL(cxgbi_conn_pdu_ready); | |
1778 | ||
1779 | static int sgl_seek_offset(struct scatterlist *sgl, unsigned int sgcnt, | |
1780 | unsigned int offset, unsigned int *off, | |
1781 | struct scatterlist **sgp) | |
1782 | { | |
1783 | int i; | |
1784 | struct scatterlist *sg; | |
1785 | ||
1786 | for_each_sg(sgl, sg, sgcnt, i) { | |
1787 | if (offset < sg->length) { | |
1788 | *off = offset; | |
1789 | *sgp = sg; | |
1790 | return 0; | |
1791 | } | |
1792 | offset -= sg->length; | |
1793 | } | |
1794 | return -EFAULT; | |
1795 | } | |
1796 | ||
1797 | static int sgl_read_to_frags(struct scatterlist *sg, unsigned int sgoffset, | |
6a39a16a | 1798 | unsigned int dlen, struct page_frag *frags, |
9ba682f0 | 1799 | int frag_max) |
1800 | { | |
1801 | unsigned int datalen = dlen; | |
1802 | unsigned int sglen = sg->length - sgoffset; | |
1803 | struct page *page = sg_page(sg); | |
1804 | int i; | |
1805 | ||
1806 | i = 0; | |
1807 | do { | |
1808 | unsigned int copy; | |
1809 | ||
1810 | if (!sglen) { | |
1811 | sg = sg_next(sg); | |
1812 | if (!sg) { | |
1813 | pr_warn("sg %d NULL, len %u/%u.\n", | |
1814 | i, datalen, dlen); | |
1815 | return -EINVAL; | |
1816 | } | |
1817 | sgoffset = 0; | |
1818 | sglen = sg->length; | |
1819 | page = sg_page(sg); | |
1820 | ||
1821 | } | |
1822 | copy = min(datalen, sglen); | |
1823 | if (i && page == frags[i - 1].page && | |
1824 | sgoffset + sg->offset == | |
6a39a16a IC |
1825 | frags[i - 1].offset + frags[i - 1].size) { |
1826 | frags[i - 1].size += copy; | |
9ba682f0 | 1827 | } else { |
1828 | if (i >= frag_max) { | |
1829 | pr_warn("too many pages %u, dlen %u.\n", | |
1830 | frag_max, dlen); | |
1831 | return -EINVAL; | |
1832 | } | |
1833 | ||
1834 | frags[i].page = page; | |
6a39a16a IC |
1835 | frags[i].offset = sg->offset + sgoffset; |
1836 | frags[i].size = copy; | |
9ba682f0 | 1837 | i++; |
1838 | } | |
1839 | datalen -= copy; | |
1840 | sgoffset += copy; | |
1841 | sglen -= copy; | |
1842 | } while (datalen); | |
1843 | ||
1844 | return i; | |
1845 | } | |
1846 | ||
1847 | int cxgbi_conn_alloc_pdu(struct iscsi_task *task, u8 opcode) | |
1848 | { | |
1849 | struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data; | |
1850 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
1851 | struct cxgbi_device *cdev = cconn->chba->cdev; | |
1852 | struct iscsi_conn *conn = task->conn; | |
1853 | struct iscsi_tcp_task *tcp_task = task->dd_data; | |
e3d2ad8c | 1854 | struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); |
9ba682f0 | 1855 | struct scsi_cmnd *sc = task->sc; |
1856 | int headroom = SKB_TX_ISCSI_PDU_HEADER_MAX; | |
1857 | ||
1858 | tcp_task->dd_data = tdata; | |
1859 | task->hdr = NULL; | |
1860 | ||
1861 | if (SKB_MAX_HEAD(cdev->skb_tx_rsvd) > (512 * MAX_SKB_FRAGS) && | |
1862 | (opcode == ISCSI_OP_SCSI_DATA_OUT || | |
1863 | (opcode == ISCSI_OP_SCSI_CMD && | |
1864 | (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_TO_DEVICE)))) | |
1865 | /* data could goes into skb head */ | |
1866 | headroom += min_t(unsigned int, | |
1867 | SKB_MAX_HEAD(cdev->skb_tx_rsvd), | |
1868 | conn->max_xmit_dlength); | |
1869 | ||
1870 | tdata->skb = alloc_skb(cdev->skb_tx_rsvd + headroom, GFP_ATOMIC); | |
1871 | if (!tdata->skb) { | |
00c4a09b TLSC |
1872 | struct cxgbi_sock *csk = cconn->cep->csk; |
1873 | struct net_device *ndev = cdev->ports[csk->port_id]; | |
1874 | ndev->stats.tx_dropped++; | |
9ba682f0 | 1875 | return -ENOMEM; |
1876 | } | |
1877 | ||
1878 | skb_reserve(tdata->skb, cdev->skb_tx_rsvd); | |
1879 | task->hdr = (struct iscsi_hdr *)tdata->skb->data; | |
1880 | task->hdr_max = SKB_TX_ISCSI_PDU_HEADER_MAX; /* BHS + AHS */ | |
1881 | ||
1882 | /* data_out uses scsi_cmd's itt */ | |
1883 | if (opcode != ISCSI_OP_SCSI_DATA_OUT) | |
1884 | task_reserve_itt(task, &task->hdr->itt); | |
1885 | ||
1886 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX, | |
1887 | "task 0x%p, op 0x%x, skb 0x%p,%u+%u/%u, itt 0x%x.\n", | |
1888 | task, opcode, tdata->skb, cdev->skb_tx_rsvd, headroom, | |
1889 | conn->max_xmit_dlength, ntohl(task->hdr->itt)); | |
1890 | ||
1891 | return 0; | |
1892 | } | |
1893 | EXPORT_SYMBOL_GPL(cxgbi_conn_alloc_pdu); | |
1894 | ||
1895 | static inline void tx_skb_setmode(struct sk_buff *skb, int hcrc, int dcrc) | |
1896 | { | |
c343a01c | 1897 | if (hcrc || dcrc) { |
1898 | u8 submode = 0; | |
9ba682f0 | 1899 | |
c343a01c | 1900 | if (hcrc) |
1901 | submode |= 1; | |
1902 | if (dcrc) | |
1903 | submode |= 2; | |
1904 | cxgbi_skcb_ulp_mode(skb) = (ULP2_MODE_ISCSI << 4) | submode; | |
1905 | } else | |
1906 | cxgbi_skcb_ulp_mode(skb) = 0; | |
9ba682f0 | 1907 | } |
1908 | ||
1909 | int cxgbi_conn_init_pdu(struct iscsi_task *task, unsigned int offset, | |
1910 | unsigned int count) | |
1911 | { | |
1912 | struct iscsi_conn *conn = task->conn; | |
e3d2ad8c | 1913 | struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); |
9ba682f0 | 1914 | struct sk_buff *skb = tdata->skb; |
1915 | unsigned int datalen = count; | |
1916 | int i, padlen = iscsi_padding(count); | |
1917 | struct page *pg; | |
1918 | ||
1919 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX, | |
1920 | "task 0x%p,0x%p, skb 0x%p, 0x%x,0x%x,0x%x, %u+%u.\n", | |
1921 | task, task->sc, skb, (*skb->data) & ISCSI_OPCODE_MASK, | |
1922 | ntohl(task->cmdsn), ntohl(task->hdr->itt), offset, count); | |
1923 | ||
1924 | skb_put(skb, task->hdr_len); | |
1925 | tx_skb_setmode(skb, conn->hdrdgst_en, datalen ? conn->datadgst_en : 0); | |
1926 | if (!count) | |
1927 | return 0; | |
1928 | ||
1929 | if (task->sc) { | |
1930 | struct scsi_data_buffer *sdb = scsi_out(task->sc); | |
1931 | struct scatterlist *sg = NULL; | |
1932 | int err; | |
1933 | ||
1934 | tdata->offset = offset; | |
1935 | tdata->count = count; | |
1936 | err = sgl_seek_offset( | |
1937 | sdb->table.sgl, sdb->table.nents, | |
1938 | tdata->offset, &tdata->sgoffset, &sg); | |
1939 | if (err < 0) { | |
1940 | pr_warn("tpdu, sgl %u, bad offset %u/%u.\n", | |
1941 | sdb->table.nents, tdata->offset, sdb->length); | |
1942 | return err; | |
1943 | } | |
1944 | err = sgl_read_to_frags(sg, tdata->sgoffset, tdata->count, | |
1945 | tdata->frags, MAX_PDU_FRAGS); | |
1946 | if (err < 0) { | |
1947 | pr_warn("tpdu, sgl %u, bad offset %u + %u.\n", | |
1948 | sdb->table.nents, tdata->offset, tdata->count); | |
1949 | return err; | |
1950 | } | |
1951 | tdata->nr_frags = err; | |
1952 | ||
1953 | if (tdata->nr_frags > MAX_SKB_FRAGS || | |
1954 | (padlen && tdata->nr_frags == MAX_SKB_FRAGS)) { | |
1955 | char *dst = skb->data + task->hdr_len; | |
6a39a16a | 1956 | struct page_frag *frag = tdata->frags; |
9ba682f0 | 1957 | |
1958 | /* data fits in the skb's headroom */ | |
1959 | for (i = 0; i < tdata->nr_frags; i++, frag++) { | |
77dfce07 | 1960 | char *src = kmap_atomic(frag->page); |
9ba682f0 | 1961 | |
6a39a16a IC |
1962 | memcpy(dst, src+frag->offset, frag->size); |
1963 | dst += frag->size; | |
77dfce07 | 1964 | kunmap_atomic(src); |
9ba682f0 | 1965 | } |
1966 | if (padlen) { | |
1967 | memset(dst, 0, padlen); | |
1968 | padlen = 0; | |
1969 | } | |
1970 | skb_put(skb, count + padlen); | |
1971 | } else { | |
1972 | /* data fit into frag_list */ | |
6a39a16a IC |
1973 | for (i = 0; i < tdata->nr_frags; i++) { |
1974 | __skb_fill_page_desc(skb, i, | |
1975 | tdata->frags[i].page, | |
1976 | tdata->frags[i].offset, | |
1977 | tdata->frags[i].size); | |
1978 | skb_frag_ref(skb, i); | |
1979 | } | |
9ba682f0 | 1980 | skb_shinfo(skb)->nr_frags = tdata->nr_frags; |
1981 | skb->len += count; | |
1982 | skb->data_len += count; | |
1983 | skb->truesize += count; | |
1984 | } | |
1985 | ||
1986 | } else { | |
1987 | pg = virt_to_page(task->data); | |
1988 | ||
1989 | get_page(pg); | |
1990 | skb_fill_page_desc(skb, 0, pg, offset_in_page(task->data), | |
1991 | count); | |
1992 | skb->len += count; | |
1993 | skb->data_len += count; | |
1994 | skb->truesize += count; | |
1995 | } | |
1996 | ||
1997 | if (padlen) { | |
1998 | i = skb_shinfo(skb)->nr_frags; | |
1999 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, | |
2000 | virt_to_page(padding), offset_in_page(padding), | |
2001 | padlen); | |
2002 | ||
2003 | skb->data_len += padlen; | |
2004 | skb->truesize += padlen; | |
2005 | skb->len += padlen; | |
2006 | } | |
2007 | ||
2008 | return 0; | |
2009 | } | |
2010 | EXPORT_SYMBOL_GPL(cxgbi_conn_init_pdu); | |
2011 | ||
2012 | int cxgbi_conn_xmit_pdu(struct iscsi_task *task) | |
2013 | { | |
2014 | struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data; | |
2015 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
e3d2ad8c | 2016 | struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); |
71f7a00b | 2017 | struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo; |
9ba682f0 | 2018 | struct sk_buff *skb = tdata->skb; |
71f7a00b | 2019 | struct cxgbi_sock *csk = NULL; |
9ba682f0 | 2020 | unsigned int datalen; |
2021 | int err; | |
2022 | ||
2023 | if (!skb) { | |
2024 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX, | |
2025 | "task 0x%p, skb NULL.\n", task); | |
2026 | return 0; | |
2027 | } | |
2028 | ||
71f7a00b VP |
2029 | if (cconn && cconn->cep) |
2030 | csk = cconn->cep->csk; | |
2031 | if (!csk) { | |
2032 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX, | |
2033 | "task 0x%p, csk gone.\n", task); | |
2034 | return -EPIPE; | |
2035 | } | |
2036 | ||
9ba682f0 | 2037 | datalen = skb->data_len; |
2038 | tdata->skb = NULL; | |
71f7a00b VP |
2039 | |
2040 | /* write ppod first if using ofldq to write ppod */ | |
2041 | if (ttinfo->flags & CXGBI_PPOD_INFO_FLAG_VALID) { | |
2042 | struct cxgbi_ppm *ppm = csk->cdev->cdev2ppm(csk->cdev); | |
2043 | ||
2044 | ttinfo->flags &= ~CXGBI_PPOD_INFO_FLAG_VALID; | |
2045 | if (csk->cdev->csk_ddp_set_map(ppm, csk, ttinfo) < 0) | |
2046 | pr_err("task 0x%p, ppod writing using ofldq failed.\n", | |
2047 | task); | |
2048 | /* continue. Let fl get the data */ | |
2049 | } | |
2050 | ||
9ba682f0 | 2051 | err = cxgbi_sock_send_pdus(cconn->cep->csk, skb); |
2052 | if (err > 0) { | |
2053 | int pdulen = err; | |
2054 | ||
2055 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
2056 | "task 0x%p,0x%p, skb 0x%p, len %u/%u, rv %d.\n", | |
2057 | task, task->sc, skb, skb->len, skb->data_len, err); | |
2058 | ||
2059 | if (task->conn->hdrdgst_en) | |
2060 | pdulen += ISCSI_DIGEST_SIZE; | |
2061 | ||
2062 | if (datalen && task->conn->datadgst_en) | |
2063 | pdulen += ISCSI_DIGEST_SIZE; | |
2064 | ||
2065 | task->conn->txdata_octets += pdulen; | |
2066 | return 0; | |
2067 | } | |
2068 | ||
2069 | if (err == -EAGAIN || err == -ENOBUFS) { | |
2070 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
2071 | "task 0x%p, skb 0x%p, len %u/%u, %d EAGAIN.\n", | |
2072 | task, skb, skb->len, skb->data_len, err); | |
2073 | /* reset skb to send when we are called again */ | |
2074 | tdata->skb = skb; | |
2075 | return err; | |
2076 | } | |
2077 | ||
9ba682f0 | 2078 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX, |
2079 | "itt 0x%x, skb 0x%p, len %u/%u, xmit err %d.\n", | |
2080 | task->itt, skb, skb->len, skb->data_len, err); | |
ed481a33 KX |
2081 | |
2082 | kfree_skb(skb); | |
2083 | ||
9ba682f0 | 2084 | iscsi_conn_printk(KERN_ERR, task->conn, "xmit err %d.\n", err); |
2085 | iscsi_conn_failure(task->conn, ISCSI_ERR_XMIT_FAILED); | |
2086 | return err; | |
2087 | } | |
2088 | EXPORT_SYMBOL_GPL(cxgbi_conn_xmit_pdu); | |
2089 | ||
2090 | void cxgbi_cleanup_task(struct iscsi_task *task) | |
2091 | { | |
71f7a00b | 2092 | struct iscsi_tcp_task *tcp_task = task->dd_data; |
e3d2ad8c | 2093 | struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); |
9ba682f0 | 2094 | |
2095 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2096 | "task 0x%p, skb 0x%p, itt 0x%x.\n", | |
2097 | task, tdata->skb, task->hdr_itt); | |
2098 | ||
71f7a00b | 2099 | tcp_task->dd_data = NULL; |
9ba682f0 | 2100 | /* never reached the xmit task callout */ |
2101 | if (tdata->skb) | |
2102 | __kfree_skb(tdata->skb); | |
9ba682f0 | 2103 | |
2104 | task_release_itt(task, task->hdr_itt); | |
69e2d1e6 VP |
2105 | memset(tdata, 0, sizeof(*tdata)); |
2106 | ||
9ba682f0 | 2107 | iscsi_tcp_cleanup_task(task); |
2108 | } | |
2109 | EXPORT_SYMBOL_GPL(cxgbi_cleanup_task); | |
2110 | ||
2111 | void cxgbi_get_conn_stats(struct iscsi_cls_conn *cls_conn, | |
2112 | struct iscsi_stats *stats) | |
2113 | { | |
2114 | struct iscsi_conn *conn = cls_conn->dd_data; | |
2115 | ||
2116 | stats->txdata_octets = conn->txdata_octets; | |
2117 | stats->rxdata_octets = conn->rxdata_octets; | |
2118 | stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; | |
2119 | stats->dataout_pdus = conn->dataout_pdus_cnt; | |
2120 | stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; | |
2121 | stats->datain_pdus = conn->datain_pdus_cnt; | |
2122 | stats->r2t_pdus = conn->r2t_pdus_cnt; | |
2123 | stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; | |
2124 | stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; | |
2125 | stats->digest_err = 0; | |
2126 | stats->timeout_err = 0; | |
2127 | stats->custom_length = 1; | |
2128 | strcpy(stats->custom[0].desc, "eh_abort_cnt"); | |
2129 | stats->custom[0].value = conn->eh_abort_cnt; | |
2130 | } | |
2131 | EXPORT_SYMBOL_GPL(cxgbi_get_conn_stats); | |
2132 | ||
2133 | static int cxgbi_conn_max_xmit_dlength(struct iscsi_conn *conn) | |
2134 | { | |
2135 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
2136 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
2137 | struct cxgbi_device *cdev = cconn->chba->cdev; | |
2138 | unsigned int headroom = SKB_MAX_HEAD(cdev->skb_tx_rsvd); | |
2139 | unsigned int max_def = 512 * MAX_SKB_FRAGS; | |
2140 | unsigned int max = max(max_def, headroom); | |
2141 | ||
2142 | max = min(cconn->chba->cdev->tx_max_size, max); | |
2143 | if (conn->max_xmit_dlength) | |
2144 | conn->max_xmit_dlength = min(conn->max_xmit_dlength, max); | |
2145 | else | |
2146 | conn->max_xmit_dlength = max; | |
2147 | cxgbi_align_pdu_size(conn->max_xmit_dlength); | |
2148 | ||
2149 | return 0; | |
2150 | } | |
2151 | ||
2152 | static int cxgbi_conn_max_recv_dlength(struct iscsi_conn *conn) | |
2153 | { | |
2154 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
2155 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
2156 | unsigned int max = cconn->chba->cdev->rx_max_size; | |
2157 | ||
2158 | cxgbi_align_pdu_size(max); | |
2159 | ||
2160 | if (conn->max_recv_dlength) { | |
2161 | if (conn->max_recv_dlength > max) { | |
2162 | pr_err("MaxRecvDataSegmentLength %u > %u.\n", | |
2163 | conn->max_recv_dlength, max); | |
2164 | return -EINVAL; | |
2165 | } | |
2166 | conn->max_recv_dlength = min(conn->max_recv_dlength, max); | |
2167 | cxgbi_align_pdu_size(conn->max_recv_dlength); | |
2168 | } else | |
2169 | conn->max_recv_dlength = max; | |
2170 | ||
2171 | return 0; | |
2172 | } | |
2173 | ||
2174 | int cxgbi_set_conn_param(struct iscsi_cls_conn *cls_conn, | |
2175 | enum iscsi_param param, char *buf, int buflen) | |
2176 | { | |
2177 | struct iscsi_conn *conn = cls_conn->dd_data; | |
9ba682f0 | 2178 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
2179 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
2180 | struct cxgbi_sock *csk = cconn->cep->csk; | |
1304be5f | 2181 | int err; |
9ba682f0 | 2182 | |
2183 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2184 | "cls_conn 0x%p, param %d, buf(%d) %s.\n", | |
2185 | cls_conn, param, buflen, buf); | |
2186 | ||
2187 | switch (param) { | |
2188 | case ISCSI_PARAM_HDRDGST_EN: | |
2189 | err = iscsi_set_param(cls_conn, param, buf, buflen); | |
2190 | if (!err && conn->hdrdgst_en) | |
2191 | err = csk->cdev->csk_ddp_setup_digest(csk, csk->tid, | |
2192 | conn->hdrdgst_en, | |
2193 | conn->datadgst_en, 0); | |
2194 | break; | |
2195 | case ISCSI_PARAM_DATADGST_EN: | |
2196 | err = iscsi_set_param(cls_conn, param, buf, buflen); | |
2197 | if (!err && conn->datadgst_en) | |
2198 | err = csk->cdev->csk_ddp_setup_digest(csk, csk->tid, | |
2199 | conn->hdrdgst_en, | |
2200 | conn->datadgst_en, 0); | |
2201 | break; | |
2202 | case ISCSI_PARAM_MAX_R2T: | |
1304be5f | 2203 | return iscsi_tcp_set_max_r2t(conn, buf); |
9ba682f0 | 2204 | case ISCSI_PARAM_MAX_RECV_DLENGTH: |
2205 | err = iscsi_set_param(cls_conn, param, buf, buflen); | |
2206 | if (!err) | |
2207 | err = cxgbi_conn_max_recv_dlength(conn); | |
2208 | break; | |
2209 | case ISCSI_PARAM_MAX_XMIT_DLENGTH: | |
2210 | err = iscsi_set_param(cls_conn, param, buf, buflen); | |
2211 | if (!err) | |
2212 | err = cxgbi_conn_max_xmit_dlength(conn); | |
2213 | break; | |
2214 | default: | |
2215 | return iscsi_set_param(cls_conn, param, buf, buflen); | |
2216 | } | |
2217 | return err; | |
2218 | } | |
2219 | EXPORT_SYMBOL_GPL(cxgbi_set_conn_param); | |
2220 | ||
fc8d0590 AB |
2221 | static inline int csk_print_port(struct cxgbi_sock *csk, char *buf) |
2222 | { | |
2223 | int len; | |
2224 | ||
2225 | cxgbi_sock_get(csk); | |
2226 | len = sprintf(buf, "%hu\n", ntohs(csk->daddr.sin_port)); | |
2227 | cxgbi_sock_put(csk); | |
2228 | ||
2229 | return len; | |
2230 | } | |
2231 | ||
2232 | static inline int csk_print_ip(struct cxgbi_sock *csk, char *buf) | |
2233 | { | |
2234 | int len; | |
2235 | ||
2236 | cxgbi_sock_get(csk); | |
2237 | if (csk->csk_family == AF_INET) | |
2238 | len = sprintf(buf, "%pI4", | |
2239 | &csk->daddr.sin_addr.s_addr); | |
2240 | else | |
2241 | len = sprintf(buf, "%pI6", | |
2242 | &csk->daddr6.sin6_addr); | |
2243 | ||
2244 | cxgbi_sock_put(csk); | |
2245 | ||
2246 | return len; | |
2247 | } | |
2248 | ||
c71b9b66 MC |
2249 | int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param param, |
2250 | char *buf) | |
9ba682f0 | 2251 | { |
c71b9b66 MC |
2252 | struct cxgbi_endpoint *cep = ep->dd_data; |
2253 | struct cxgbi_sock *csk; | |
9ba682f0 | 2254 | int len; |
2255 | ||
2256 | log_debug(1 << CXGBI_DBG_ISCSI, | |
c71b9b66 | 2257 | "cls_conn 0x%p, param %d.\n", ep, param); |
9ba682f0 | 2258 | |
2259 | switch (param) { | |
2260 | case ISCSI_PARAM_CONN_PORT: | |
9ba682f0 | 2261 | case ISCSI_PARAM_CONN_ADDRESS: |
c71b9b66 MC |
2262 | if (!cep) |
2263 | return -ENOTCONN; | |
2264 | ||
2265 | csk = cep->csk; | |
2266 | if (!csk) | |
2267 | return -ENOTCONN; | |
2268 | ||
2269 | return iscsi_conn_get_addr_param((struct sockaddr_storage *) | |
2270 | &csk->daddr, param, buf); | |
9ba682f0 | 2271 | default: |
c71b9b66 | 2272 | return -ENOSYS; |
9ba682f0 | 2273 | } |
2274 | return len; | |
2275 | } | |
c71b9b66 | 2276 | EXPORT_SYMBOL_GPL(cxgbi_get_ep_param); |
9ba682f0 | 2277 | |
2278 | struct iscsi_cls_conn * | |
2279 | cxgbi_create_conn(struct iscsi_cls_session *cls_session, u32 cid) | |
2280 | { | |
2281 | struct iscsi_cls_conn *cls_conn; | |
2282 | struct iscsi_conn *conn; | |
2283 | struct iscsi_tcp_conn *tcp_conn; | |
2284 | struct cxgbi_conn *cconn; | |
2285 | ||
2286 | cls_conn = iscsi_tcp_conn_setup(cls_session, sizeof(*cconn), cid); | |
2287 | if (!cls_conn) | |
2288 | return NULL; | |
2289 | ||
2290 | conn = cls_conn->dd_data; | |
2291 | tcp_conn = conn->dd_data; | |
2292 | cconn = tcp_conn->dd_data; | |
2293 | cconn->iconn = conn; | |
2294 | ||
2295 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2296 | "cid %u(0x%x), cls 0x%p,0x%p, conn 0x%p,0x%p,0x%p.\n", | |
2297 | cid, cid, cls_session, cls_conn, conn, tcp_conn, cconn); | |
2298 | ||
2299 | return cls_conn; | |
2300 | } | |
2301 | EXPORT_SYMBOL_GPL(cxgbi_create_conn); | |
2302 | ||
2303 | int cxgbi_bind_conn(struct iscsi_cls_session *cls_session, | |
2304 | struct iscsi_cls_conn *cls_conn, | |
2305 | u64 transport_eph, int is_leading) | |
2306 | { | |
2307 | struct iscsi_conn *conn = cls_conn->dd_data; | |
2308 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
2309 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
71f7a00b | 2310 | struct cxgbi_ppm *ppm; |
9ba682f0 | 2311 | struct iscsi_endpoint *ep; |
2312 | struct cxgbi_endpoint *cep; | |
2313 | struct cxgbi_sock *csk; | |
2314 | int err; | |
2315 | ||
2316 | ep = iscsi_lookup_endpoint(transport_eph); | |
2317 | if (!ep) | |
2318 | return -EINVAL; | |
2319 | ||
2320 | /* setup ddp pagesize */ | |
2321 | cep = ep->dd_data; | |
2322 | csk = cep->csk; | |
9ba682f0 | 2323 | |
71f7a00b VP |
2324 | ppm = csk->cdev->cdev2ppm(csk->cdev); |
2325 | err = csk->cdev->csk_ddp_setup_pgidx(csk, csk->tid, | |
2326 | ppm->tformat.pgsz_idx_dflt, 0); | |
2327 | if (err < 0) | |
2328 | return err; | |
2329 | ||
9ba682f0 | 2330 | err = iscsi_conn_bind(cls_session, cls_conn, is_leading); |
2331 | if (err) | |
2332 | return -EINVAL; | |
2333 | ||
2334 | /* calculate the tag idx bits needed for this conn based on cmds_max */ | |
2335 | cconn->task_idx_bits = (__ilog2_u32(conn->session->cmds_max - 1)) + 1; | |
2336 | ||
e3d2ad8c | 2337 | write_lock_bh(&csk->callback_lock); |
9ba682f0 | 2338 | csk->user_data = conn; |
2339 | cconn->chba = cep->chba; | |
2340 | cconn->cep = cep; | |
2341 | cep->cconn = cconn; | |
e3d2ad8c | 2342 | write_unlock_bh(&csk->callback_lock); |
9ba682f0 | 2343 | |
2344 | cxgbi_conn_max_xmit_dlength(conn); | |
2345 | cxgbi_conn_max_recv_dlength(conn); | |
2346 | ||
9ba682f0 | 2347 | log_debug(1 << CXGBI_DBG_ISCSI, |
2348 | "cls 0x%p,0x%p, ep 0x%p, cconn 0x%p, csk 0x%p.\n", | |
2349 | cls_session, cls_conn, ep, cconn, csk); | |
2350 | /* init recv engine */ | |
2351 | iscsi_tcp_hdr_recv_prep(tcp_conn); | |
2352 | ||
2353 | return 0; | |
2354 | } | |
2355 | EXPORT_SYMBOL_GPL(cxgbi_bind_conn); | |
2356 | ||
2357 | struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *ep, | |
2358 | u16 cmds_max, u16 qdepth, | |
2359 | u32 initial_cmdsn) | |
2360 | { | |
2361 | struct cxgbi_endpoint *cep; | |
2362 | struct cxgbi_hba *chba; | |
2363 | struct Scsi_Host *shost; | |
2364 | struct iscsi_cls_session *cls_session; | |
2365 | struct iscsi_session *session; | |
2366 | ||
2367 | if (!ep) { | |
2368 | pr_err("missing endpoint.\n"); | |
2369 | return NULL; | |
2370 | } | |
2371 | ||
2372 | cep = ep->dd_data; | |
2373 | chba = cep->chba; | |
2374 | shost = chba->shost; | |
2375 | ||
2376 | BUG_ON(chba != iscsi_host_priv(shost)); | |
2377 | ||
2378 | cls_session = iscsi_session_setup(chba->cdev->itp, shost, | |
2379 | cmds_max, 0, | |
2380 | sizeof(struct iscsi_tcp_task) + | |
2381 | sizeof(struct cxgbi_task_data), | |
2382 | initial_cmdsn, ISCSI_MAX_TARGET); | |
2383 | if (!cls_session) | |
2384 | return NULL; | |
2385 | ||
2386 | session = cls_session->dd_data; | |
2387 | if (iscsi_tcp_r2tpool_alloc(session)) | |
2388 | goto remove_session; | |
2389 | ||
2390 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2391 | "ep 0x%p, cls sess 0x%p.\n", ep, cls_session); | |
2392 | return cls_session; | |
2393 | ||
2394 | remove_session: | |
2395 | iscsi_session_teardown(cls_session); | |
2396 | return NULL; | |
2397 | } | |
2398 | EXPORT_SYMBOL_GPL(cxgbi_create_session); | |
2399 | ||
2400 | void cxgbi_destroy_session(struct iscsi_cls_session *cls_session) | |
2401 | { | |
2402 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2403 | "cls sess 0x%p.\n", cls_session); | |
2404 | ||
2405 | iscsi_tcp_r2tpool_free(cls_session->dd_data); | |
2406 | iscsi_session_teardown(cls_session); | |
2407 | } | |
2408 | EXPORT_SYMBOL_GPL(cxgbi_destroy_session); | |
2409 | ||
2410 | int cxgbi_set_host_param(struct Scsi_Host *shost, enum iscsi_host_param param, | |
2411 | char *buf, int buflen) | |
2412 | { | |
2413 | struct cxgbi_hba *chba = iscsi_host_priv(shost); | |
2414 | ||
2415 | if (!chba->ndev) { | |
2416 | shost_printk(KERN_ERR, shost, "Could not get host param. " | |
2417 | "netdev for host not set.\n"); | |
2418 | return -ENODEV; | |
2419 | } | |
2420 | ||
2421 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2422 | "shost 0x%p, hba 0x%p,%s, param %d, buf(%d) %s.\n", | |
2423 | shost, chba, chba->ndev->name, param, buflen, buf); | |
2424 | ||
2425 | switch (param) { | |
2426 | case ISCSI_HOST_PARAM_IPADDRESS: | |
2427 | { | |
2428 | __be32 addr = in_aton(buf); | |
2429 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2430 | "hba %s, req. ipv4 %pI4.\n", chba->ndev->name, &addr); | |
2431 | cxgbi_set_iscsi_ipv4(chba, addr); | |
2432 | return 0; | |
2433 | } | |
2434 | case ISCSI_HOST_PARAM_HWADDRESS: | |
2435 | case ISCSI_HOST_PARAM_NETDEV_NAME: | |
2436 | return 0; | |
2437 | default: | |
2438 | return iscsi_host_set_param(shost, param, buf, buflen); | |
2439 | } | |
2440 | } | |
2441 | EXPORT_SYMBOL_GPL(cxgbi_set_host_param); | |
2442 | ||
2443 | int cxgbi_get_host_param(struct Scsi_Host *shost, enum iscsi_host_param param, | |
2444 | char *buf) | |
2445 | { | |
2446 | struct cxgbi_hba *chba = iscsi_host_priv(shost); | |
2447 | int len = 0; | |
2448 | ||
2449 | if (!chba->ndev) { | |
2450 | shost_printk(KERN_ERR, shost, "Could not get host param. " | |
2451 | "netdev for host not set.\n"); | |
2452 | return -ENODEV; | |
2453 | } | |
2454 | ||
2455 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2456 | "shost 0x%p, hba 0x%p,%s, param %d.\n", | |
2457 | shost, chba, chba->ndev->name, param); | |
2458 | ||
2459 | switch (param) { | |
2460 | case ISCSI_HOST_PARAM_HWADDRESS: | |
2461 | len = sysfs_format_mac(buf, chba->ndev->dev_addr, 6); | |
2462 | break; | |
2463 | case ISCSI_HOST_PARAM_NETDEV_NAME: | |
2464 | len = sprintf(buf, "%s\n", chba->ndev->name); | |
2465 | break; | |
2466 | case ISCSI_HOST_PARAM_IPADDRESS: | |
2467 | { | |
dd9ad67e AB |
2468 | struct cxgbi_sock *csk = find_sock_on_port(chba->cdev, |
2469 | chba->port_id); | |
2470 | if (csk) { | |
2471 | len = sprintf(buf, "%pIS", | |
2472 | (struct sockaddr *)&csk->saddr); | |
2473 | } | |
9ba682f0 | 2474 | log_debug(1 << CXGBI_DBG_ISCSI, |
dd9ad67e | 2475 | "hba %s, addr %s.\n", chba->ndev->name, buf); |
9ba682f0 | 2476 | break; |
2477 | } | |
2478 | default: | |
2479 | return iscsi_host_get_param(shost, param, buf); | |
2480 | } | |
2481 | ||
2482 | return len; | |
2483 | } | |
2484 | EXPORT_SYMBOL_GPL(cxgbi_get_host_param); | |
2485 | ||
2486 | struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *shost, | |
2487 | struct sockaddr *dst_addr, | |
2488 | int non_blocking) | |
2489 | { | |
2490 | struct iscsi_endpoint *ep; | |
2491 | struct cxgbi_endpoint *cep; | |
2492 | struct cxgbi_hba *hba = NULL; | |
2493 | struct cxgbi_sock *csk; | |
2494 | int err = -EINVAL; | |
2495 | ||
2496 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK, | |
2497 | "shost 0x%p, non_blocking %d, dst_addr 0x%p.\n", | |
2498 | shost, non_blocking, dst_addr); | |
2499 | ||
2500 | if (shost) { | |
2501 | hba = iscsi_host_priv(shost); | |
2502 | if (!hba) { | |
2503 | pr_info("shost 0x%p, priv NULL.\n", shost); | |
2504 | goto err_out; | |
2505 | } | |
2506 | } | |
2507 | ||
fc8d0590 AB |
2508 | if (dst_addr->sa_family == AF_INET) { |
2509 | csk = cxgbi_check_route(dst_addr); | |
e81fbf6c | 2510 | #if IS_ENABLED(CONFIG_IPV6) |
fc8d0590 AB |
2511 | } else if (dst_addr->sa_family == AF_INET6) { |
2512 | csk = cxgbi_check_route6(dst_addr); | |
e81fbf6c | 2513 | #endif |
fc8d0590 AB |
2514 | } else { |
2515 | pr_info("address family 0x%x NOT supported.\n", | |
2516 | dst_addr->sa_family); | |
2517 | err = -EAFNOSUPPORT; | |
2518 | return (struct iscsi_endpoint *)ERR_PTR(err); | |
2519 | } | |
2520 | ||
9ba682f0 | 2521 | if (IS_ERR(csk)) |
2522 | return (struct iscsi_endpoint *)csk; | |
2523 | cxgbi_sock_get(csk); | |
2524 | ||
2525 | if (!hba) | |
2526 | hba = csk->cdev->hbas[csk->port_id]; | |
2527 | else if (hba != csk->cdev->hbas[csk->port_id]) { | |
2528 | pr_info("Could not connect through requested host %u" | |
2529 | "hba 0x%p != 0x%p (%u).\n", | |
2530 | shost->host_no, hba, | |
2531 | csk->cdev->hbas[csk->port_id], csk->port_id); | |
2532 | err = -ENOSPC; | |
2533 | goto release_conn; | |
2534 | } | |
2535 | ||
2536 | err = sock_get_port(csk); | |
2537 | if (err) | |
2538 | goto release_conn; | |
2539 | ||
2540 | cxgbi_sock_set_state(csk, CTP_CONNECTING); | |
2541 | err = csk->cdev->csk_init_act_open(csk); | |
2542 | if (err) | |
2543 | goto release_conn; | |
2544 | ||
2545 | if (cxgbi_sock_is_closing(csk)) { | |
2546 | err = -ENOSPC; | |
2547 | pr_info("csk 0x%p is closing.\n", csk); | |
2548 | goto release_conn; | |
2549 | } | |
2550 | ||
2551 | ep = iscsi_create_endpoint(sizeof(*cep)); | |
2552 | if (!ep) { | |
2553 | err = -ENOMEM; | |
2554 | pr_info("iscsi alloc ep, OOM.\n"); | |
2555 | goto release_conn; | |
2556 | } | |
2557 | ||
2558 | cep = ep->dd_data; | |
2559 | cep->csk = csk; | |
2560 | cep->chba = hba; | |
2561 | ||
2562 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK, | |
2563 | "ep 0x%p, cep 0x%p, csk 0x%p, hba 0x%p,%s.\n", | |
2564 | ep, cep, csk, hba, hba->ndev->name); | |
2565 | return ep; | |
2566 | ||
2567 | release_conn: | |
2568 | cxgbi_sock_put(csk); | |
2569 | cxgbi_sock_closed(csk); | |
2570 | err_out: | |
2571 | return ERR_PTR(err); | |
2572 | } | |
2573 | EXPORT_SYMBOL_GPL(cxgbi_ep_connect); | |
2574 | ||
2575 | int cxgbi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) | |
2576 | { | |
2577 | struct cxgbi_endpoint *cep = ep->dd_data; | |
2578 | struct cxgbi_sock *csk = cep->csk; | |
2579 | ||
2580 | if (!cxgbi_sock_is_established(csk)) | |
2581 | return 0; | |
2582 | return 1; | |
2583 | } | |
2584 | EXPORT_SYMBOL_GPL(cxgbi_ep_poll); | |
2585 | ||
2586 | void cxgbi_ep_disconnect(struct iscsi_endpoint *ep) | |
2587 | { | |
2588 | struct cxgbi_endpoint *cep = ep->dd_data; | |
2589 | struct cxgbi_conn *cconn = cep->cconn; | |
2590 | struct cxgbi_sock *csk = cep->csk; | |
2591 | ||
2592 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK, | |
2593 | "ep 0x%p, cep 0x%p, cconn 0x%p, csk 0x%p,%u,0x%lx.\n", | |
2594 | ep, cep, cconn, csk, csk->state, csk->flags); | |
2595 | ||
2596 | if (cconn && cconn->iconn) { | |
2597 | iscsi_suspend_tx(cconn->iconn); | |
2598 | write_lock_bh(&csk->callback_lock); | |
2599 | cep->csk->user_data = NULL; | |
2600 | cconn->cep = NULL; | |
2601 | write_unlock_bh(&csk->callback_lock); | |
2602 | } | |
2603 | iscsi_destroy_endpoint(ep); | |
2604 | ||
2605 | if (likely(csk->state >= CTP_ESTABLISHED)) | |
2606 | need_active_close(csk); | |
2607 | else | |
2608 | cxgbi_sock_closed(csk); | |
2609 | ||
2610 | cxgbi_sock_put(csk); | |
2611 | } | |
2612 | EXPORT_SYMBOL_GPL(cxgbi_ep_disconnect); | |
2613 | ||
2614 | int cxgbi_iscsi_init(struct iscsi_transport *itp, | |
2615 | struct scsi_transport_template **stt) | |
2616 | { | |
2617 | *stt = iscsi_register_transport(itp); | |
2618 | if (*stt == NULL) { | |
2619 | pr_err("unable to register %s transport 0x%p.\n", | |
2620 | itp->name, itp); | |
2621 | return -ENODEV; | |
2622 | } | |
2623 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2624 | "%s, registered iscsi transport 0x%p.\n", | |
2625 | itp->name, stt); | |
2626 | return 0; | |
2627 | } | |
2628 | EXPORT_SYMBOL_GPL(cxgbi_iscsi_init); | |
2629 | ||
2630 | void cxgbi_iscsi_cleanup(struct iscsi_transport *itp, | |
2631 | struct scsi_transport_template **stt) | |
2632 | { | |
2633 | if (*stt) { | |
2634 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2635 | "de-register transport 0x%p, %s, stt 0x%p.\n", | |
2636 | itp, itp->name, *stt); | |
2637 | *stt = NULL; | |
2638 | iscsi_unregister_transport(itp); | |
2639 | } | |
2640 | } | |
2641 | EXPORT_SYMBOL_GPL(cxgbi_iscsi_cleanup); | |
2642 | ||
587a1f16 | 2643 | umode_t cxgbi_attr_is_visible(int param_type, int param) |
3128c6c7 MC |
2644 | { |
2645 | switch (param_type) { | |
f27fb2ef MC |
2646 | case ISCSI_HOST_PARAM: |
2647 | switch (param) { | |
2648 | case ISCSI_HOST_PARAM_NETDEV_NAME: | |
2649 | case ISCSI_HOST_PARAM_HWADDRESS: | |
2650 | case ISCSI_HOST_PARAM_IPADDRESS: | |
2651 | case ISCSI_HOST_PARAM_INITIATOR_NAME: | |
2652 | return S_IRUGO; | |
2653 | default: | |
2654 | return 0; | |
2655 | } | |
3128c6c7 MC |
2656 | case ISCSI_PARAM: |
2657 | switch (param) { | |
2658 | case ISCSI_PARAM_MAX_RECV_DLENGTH: | |
2659 | case ISCSI_PARAM_MAX_XMIT_DLENGTH: | |
2660 | case ISCSI_PARAM_HDRDGST_EN: | |
2661 | case ISCSI_PARAM_DATADGST_EN: | |
2662 | case ISCSI_PARAM_CONN_ADDRESS: | |
2663 | case ISCSI_PARAM_CONN_PORT: | |
2664 | case ISCSI_PARAM_EXP_STATSN: | |
2665 | case ISCSI_PARAM_PERSISTENT_ADDRESS: | |
2666 | case ISCSI_PARAM_PERSISTENT_PORT: | |
2667 | case ISCSI_PARAM_PING_TMO: | |
2668 | case ISCSI_PARAM_RECV_TMO: | |
1d063c17 MC |
2669 | case ISCSI_PARAM_INITIAL_R2T_EN: |
2670 | case ISCSI_PARAM_MAX_R2T: | |
2671 | case ISCSI_PARAM_IMM_DATA_EN: | |
2672 | case ISCSI_PARAM_FIRST_BURST: | |
2673 | case ISCSI_PARAM_MAX_BURST: | |
2674 | case ISCSI_PARAM_PDU_INORDER_EN: | |
2675 | case ISCSI_PARAM_DATASEQ_INORDER_EN: | |
2676 | case ISCSI_PARAM_ERL: | |
2677 | case ISCSI_PARAM_TARGET_NAME: | |
2678 | case ISCSI_PARAM_TPGT: | |
2679 | case ISCSI_PARAM_USERNAME: | |
2680 | case ISCSI_PARAM_PASSWORD: | |
2681 | case ISCSI_PARAM_USERNAME_IN: | |
2682 | case ISCSI_PARAM_PASSWORD_IN: | |
2683 | case ISCSI_PARAM_FAST_ABORT: | |
2684 | case ISCSI_PARAM_ABORT_TMO: | |
2685 | case ISCSI_PARAM_LU_RESET_TMO: | |
2686 | case ISCSI_PARAM_TGT_RESET_TMO: | |
2687 | case ISCSI_PARAM_IFACE_NAME: | |
2688 | case ISCSI_PARAM_INITIATOR_NAME: | |
3128c6c7 MC |
2689 | return S_IRUGO; |
2690 | default: | |
2691 | return 0; | |
2692 | } | |
2693 | } | |
2694 | ||
2695 | return 0; | |
2696 | } | |
2697 | EXPORT_SYMBOL_GPL(cxgbi_attr_is_visible); | |
2698 | ||
9ba682f0 | 2699 | static int __init libcxgbi_init_module(void) |
2700 | { | |
0ea5bf3d | 2701 | pr_info("%s", version); |
9ba682f0 | 2702 | return 0; |
2703 | } | |
2704 | ||
2705 | static void __exit libcxgbi_exit_module(void) | |
2706 | { | |
2707 | cxgbi_device_unregister_all(0xFF); | |
2708 | return; | |
2709 | } | |
2710 | ||
2711 | module_init(libcxgbi_init_module); | |
2712 | module_exit(libcxgbi_exit_module); |