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9ba682f0 | 1 | /* |
2 | * libcxgbi.c: Chelsio common library for T3/T4 iSCSI driver. | |
3 | * | |
4 | * Copyright (c) 2010 Chelsio Communications, Inc. | |
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" | |
41 | #define DRV_MODULE_VERSION "0.9.0" | |
42 | #define DRV_MODULE_RELDATE "Jun. 2010" | |
43 | ||
44 | MODULE_AUTHOR("Chelsio Communications, Inc."); | |
45 | MODULE_DESCRIPTION(DRV_MODULE_DESC); | |
46 | MODULE_VERSION(DRV_MODULE_VERSION); | |
47 | MODULE_LICENSE("GPL"); | |
48 | ||
49 | module_param(dbg_level, uint, 0644); | |
50 | MODULE_PARM_DESC(dbg_level, "libiscsi debug level (default=0)"); | |
51 | ||
52 | ||
53 | /* | |
54 | * cxgbi device management | |
55 | * maintains a list of the cxgbi devices | |
56 | */ | |
57 | static LIST_HEAD(cdev_list); | |
58 | static DEFINE_MUTEX(cdev_mutex); | |
59 | ||
576b5863 AB |
60 | static LIST_HEAD(cdev_rcu_list); |
61 | static DEFINE_SPINLOCK(cdev_rcu_lock); | |
62 | ||
9ba682f0 | 63 | int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base, |
64 | unsigned int max_conn) | |
65 | { | |
66 | struct cxgbi_ports_map *pmap = &cdev->pmap; | |
67 | ||
68 | pmap->port_csk = cxgbi_alloc_big_mem(max_conn * | |
69 | sizeof(struct cxgbi_sock *), | |
70 | GFP_KERNEL); | |
71 | if (!pmap->port_csk) { | |
72 | pr_warn("cdev 0x%p, portmap OOM %u.\n", cdev, max_conn); | |
73 | return -ENOMEM; | |
74 | } | |
75 | ||
76 | pmap->max_connect = max_conn; | |
77 | pmap->sport_base = base; | |
78 | spin_lock_init(&pmap->lock); | |
79 | return 0; | |
80 | } | |
81 | EXPORT_SYMBOL_GPL(cxgbi_device_portmap_create); | |
82 | ||
83 | void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev) | |
84 | { | |
85 | struct cxgbi_ports_map *pmap = &cdev->pmap; | |
86 | struct cxgbi_sock *csk; | |
87 | int i; | |
88 | ||
89 | for (i = 0; i < pmap->max_connect; i++) { | |
90 | if (pmap->port_csk[i]) { | |
91 | csk = pmap->port_csk[i]; | |
92 | pmap->port_csk[i] = NULL; | |
93 | log_debug(1 << CXGBI_DBG_SOCK, | |
94 | "csk 0x%p, cdev 0x%p, offload down.\n", | |
95 | csk, cdev); | |
96 | spin_lock_bh(&csk->lock); | |
97 | cxgbi_sock_set_flag(csk, CTPF_OFFLOAD_DOWN); | |
98 | cxgbi_sock_closed(csk); | |
99 | spin_unlock_bh(&csk->lock); | |
100 | cxgbi_sock_put(csk); | |
101 | } | |
102 | } | |
103 | } | |
104 | EXPORT_SYMBOL_GPL(cxgbi_device_portmap_cleanup); | |
105 | ||
106 | static inline void cxgbi_device_destroy(struct cxgbi_device *cdev) | |
107 | { | |
108 | log_debug(1 << CXGBI_DBG_DEV, | |
109 | "cdev 0x%p, p# %u.\n", cdev, cdev->nports); | |
110 | cxgbi_hbas_remove(cdev); | |
111 | cxgbi_device_portmap_cleanup(cdev); | |
112 | if (cdev->dev_ddp_cleanup) | |
113 | cdev->dev_ddp_cleanup(cdev); | |
114 | else | |
115 | cxgbi_ddp_cleanup(cdev); | |
116 | if (cdev->ddp) | |
117 | cxgbi_ddp_cleanup(cdev); | |
118 | if (cdev->pmap.max_connect) | |
119 | cxgbi_free_big_mem(cdev->pmap.port_csk); | |
120 | kfree(cdev); | |
121 | } | |
122 | ||
123 | struct cxgbi_device *cxgbi_device_register(unsigned int extra, | |
124 | unsigned int nports) | |
125 | { | |
126 | struct cxgbi_device *cdev; | |
127 | ||
128 | cdev = kzalloc(sizeof(*cdev) + extra + nports * | |
129 | (sizeof(struct cxgbi_hba *) + | |
130 | sizeof(struct net_device *)), | |
131 | GFP_KERNEL); | |
132 | if (!cdev) { | |
133 | pr_warn("nport %d, OOM.\n", nports); | |
134 | return NULL; | |
135 | } | |
136 | cdev->ports = (struct net_device **)(cdev + 1); | |
137 | cdev->hbas = (struct cxgbi_hba **)(((char*)cdev->ports) + nports * | |
138 | sizeof(struct net_device *)); | |
139 | if (extra) | |
140 | cdev->dd_data = ((char *)cdev->hbas) + | |
141 | nports * sizeof(struct cxgbi_hba *); | |
142 | spin_lock_init(&cdev->pmap.lock); | |
143 | ||
144 | mutex_lock(&cdev_mutex); | |
145 | list_add_tail(&cdev->list_head, &cdev_list); | |
146 | mutex_unlock(&cdev_mutex); | |
147 | ||
576b5863 AB |
148 | spin_lock(&cdev_rcu_lock); |
149 | list_add_tail_rcu(&cdev->rcu_node, &cdev_rcu_list); | |
150 | spin_unlock(&cdev_rcu_lock); | |
151 | ||
9ba682f0 | 152 | log_debug(1 << CXGBI_DBG_DEV, |
153 | "cdev 0x%p, p# %u.\n", cdev, nports); | |
154 | return cdev; | |
155 | } | |
156 | EXPORT_SYMBOL_GPL(cxgbi_device_register); | |
157 | ||
158 | void cxgbi_device_unregister(struct cxgbi_device *cdev) | |
159 | { | |
160 | log_debug(1 << CXGBI_DBG_DEV, | |
161 | "cdev 0x%p, p# %u,%s.\n", | |
162 | cdev, cdev->nports, cdev->nports ? cdev->ports[0]->name : ""); | |
576b5863 | 163 | |
9ba682f0 | 164 | mutex_lock(&cdev_mutex); |
165 | list_del(&cdev->list_head); | |
166 | mutex_unlock(&cdev_mutex); | |
576b5863 AB |
167 | |
168 | spin_lock(&cdev_rcu_lock); | |
169 | list_del_rcu(&cdev->rcu_node); | |
170 | spin_unlock(&cdev_rcu_lock); | |
171 | synchronize_rcu(); | |
172 | ||
9ba682f0 | 173 | cxgbi_device_destroy(cdev); |
174 | } | |
175 | EXPORT_SYMBOL_GPL(cxgbi_device_unregister); | |
176 | ||
177 | void cxgbi_device_unregister_all(unsigned int flag) | |
178 | { | |
179 | struct cxgbi_device *cdev, *tmp; | |
180 | ||
181 | mutex_lock(&cdev_mutex); | |
182 | list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) { | |
183 | if ((cdev->flags & flag) == flag) { | |
576b5863 AB |
184 | mutex_unlock(&cdev_mutex); |
185 | cxgbi_device_unregister(cdev); | |
186 | mutex_lock(&cdev_mutex); | |
9ba682f0 | 187 | } |
188 | } | |
189 | mutex_unlock(&cdev_mutex); | |
190 | } | |
191 | EXPORT_SYMBOL_GPL(cxgbi_device_unregister_all); | |
192 | ||
193 | struct cxgbi_device *cxgbi_device_find_by_lldev(void *lldev) | |
194 | { | |
195 | struct cxgbi_device *cdev, *tmp; | |
196 | ||
197 | mutex_lock(&cdev_mutex); | |
198 | list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) { | |
199 | if (cdev->lldev == lldev) { | |
200 | mutex_unlock(&cdev_mutex); | |
201 | return cdev; | |
202 | } | |
203 | } | |
204 | mutex_unlock(&cdev_mutex); | |
576b5863 | 205 | |
9ba682f0 | 206 | log_debug(1 << CXGBI_DBG_DEV, |
207 | "lldev 0x%p, NO match found.\n", lldev); | |
208 | return NULL; | |
209 | } | |
210 | EXPORT_SYMBOL_GPL(cxgbi_device_find_by_lldev); | |
211 | ||
fc8d0590 AB |
212 | struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev, |
213 | int *port) | |
9ba682f0 | 214 | { |
0b3d8947 | 215 | struct net_device *vdev = NULL; |
9ba682f0 | 216 | struct cxgbi_device *cdev, *tmp; |
217 | int i; | |
218 | ||
0b3d8947 | 219 | if (ndev->priv_flags & IFF_802_1Q_VLAN) { |
220 | vdev = ndev; | |
9ba682f0 | 221 | ndev = vlan_dev_real_dev(ndev); |
0b3d8947 | 222 | log_debug(1 << CXGBI_DBG_DEV, |
223 | "vlan dev %s -> %s.\n", vdev->name, ndev->name); | |
224 | } | |
9ba682f0 | 225 | |
226 | mutex_lock(&cdev_mutex); | |
227 | list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) { | |
228 | for (i = 0; i < cdev->nports; i++) { | |
229 | if (ndev == cdev->ports[i]) { | |
0b3d8947 | 230 | cdev->hbas[i]->vdev = vdev; |
9ba682f0 | 231 | mutex_unlock(&cdev_mutex); |
232 | if (port) | |
233 | *port = i; | |
234 | return cdev; | |
235 | } | |
236 | } | |
237 | } | |
238 | mutex_unlock(&cdev_mutex); | |
239 | log_debug(1 << CXGBI_DBG_DEV, | |
240 | "ndev 0x%p, %s, NO match found.\n", ndev, ndev->name); | |
241 | return NULL; | |
242 | } | |
fc8d0590 AB |
243 | EXPORT_SYMBOL_GPL(cxgbi_device_find_by_netdev); |
244 | ||
576b5863 AB |
245 | struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *ndev, |
246 | int *port) | |
247 | { | |
248 | struct net_device *vdev = NULL; | |
249 | struct cxgbi_device *cdev; | |
250 | int i; | |
251 | ||
252 | if (ndev->priv_flags & IFF_802_1Q_VLAN) { | |
253 | vdev = ndev; | |
254 | ndev = vlan_dev_real_dev(ndev); | |
255 | pr_info("vlan dev %s -> %s.\n", vdev->name, ndev->name); | |
256 | } | |
257 | ||
258 | rcu_read_lock(); | |
259 | list_for_each_entry_rcu(cdev, &cdev_rcu_list, rcu_node) { | |
260 | for (i = 0; i < cdev->nports; i++) { | |
261 | if (ndev == cdev->ports[i]) { | |
262 | cdev->hbas[i]->vdev = vdev; | |
263 | rcu_read_unlock(); | |
264 | if (port) | |
265 | *port = i; | |
266 | return cdev; | |
267 | } | |
268 | } | |
269 | } | |
270 | rcu_read_unlock(); | |
271 | ||
272 | log_debug(1 << CXGBI_DBG_DEV, | |
273 | "ndev 0x%p, %s, NO match found.\n", ndev, ndev->name); | |
274 | return NULL; | |
275 | } | |
276 | EXPORT_SYMBOL_GPL(cxgbi_device_find_by_netdev_rcu); | |
277 | ||
fc8d0590 AB |
278 | static struct cxgbi_device *cxgbi_device_find_by_mac(struct net_device *ndev, |
279 | int *port) | |
280 | { | |
281 | struct net_device *vdev = NULL; | |
282 | struct cxgbi_device *cdev, *tmp; | |
283 | int i; | |
284 | ||
285 | if (ndev->priv_flags & IFF_802_1Q_VLAN) { | |
286 | vdev = ndev; | |
287 | ndev = vlan_dev_real_dev(ndev); | |
288 | pr_info("vlan dev %s -> %s.\n", vdev->name, ndev->name); | |
289 | } | |
290 | ||
291 | mutex_lock(&cdev_mutex); | |
292 | list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) { | |
293 | for (i = 0; i < cdev->nports; i++) { | |
294 | if (!memcmp(ndev->dev_addr, cdev->ports[i]->dev_addr, | |
295 | MAX_ADDR_LEN)) { | |
296 | cdev->hbas[i]->vdev = vdev; | |
297 | mutex_unlock(&cdev_mutex); | |
298 | if (port) | |
299 | *port = i; | |
300 | return cdev; | |
301 | } | |
302 | } | |
303 | } | |
304 | mutex_unlock(&cdev_mutex); | |
305 | log_debug(1 << CXGBI_DBG_DEV, | |
306 | "ndev 0x%p, %s, NO match mac found.\n", | |
307 | ndev, ndev->name); | |
308 | return NULL; | |
309 | } | |
9ba682f0 | 310 | |
9ba682f0 | 311 | void cxgbi_hbas_remove(struct cxgbi_device *cdev) |
312 | { | |
313 | int i; | |
314 | struct cxgbi_hba *chba; | |
315 | ||
316 | log_debug(1 << CXGBI_DBG_DEV, | |
317 | "cdev 0x%p, p#%u.\n", cdev, cdev->nports); | |
318 | ||
319 | for (i = 0; i < cdev->nports; i++) { | |
320 | chba = cdev->hbas[i]; | |
321 | if (chba) { | |
322 | cdev->hbas[i] = NULL; | |
323 | iscsi_host_remove(chba->shost); | |
324 | pci_dev_put(cdev->pdev); | |
325 | iscsi_host_free(chba->shost); | |
326 | } | |
327 | } | |
328 | } | |
329 | EXPORT_SYMBOL_GPL(cxgbi_hbas_remove); | |
330 | ||
1abf635d | 331 | int cxgbi_hbas_add(struct cxgbi_device *cdev, u64 max_lun, |
9ba682f0 | 332 | unsigned int max_id, struct scsi_host_template *sht, |
333 | struct scsi_transport_template *stt) | |
334 | { | |
335 | struct cxgbi_hba *chba; | |
336 | struct Scsi_Host *shost; | |
337 | int i, err; | |
338 | ||
339 | log_debug(1 << CXGBI_DBG_DEV, "cdev 0x%p, p#%u.\n", cdev, cdev->nports); | |
340 | ||
341 | for (i = 0; i < cdev->nports; i++) { | |
342 | shost = iscsi_host_alloc(sht, sizeof(*chba), 1); | |
343 | if (!shost) { | |
344 | pr_info("0x%p, p%d, %s, host alloc failed.\n", | |
345 | cdev, i, cdev->ports[i]->name); | |
346 | err = -ENOMEM; | |
347 | goto err_out; | |
348 | } | |
349 | ||
350 | shost->transportt = stt; | |
351 | shost->max_lun = max_lun; | |
352 | shost->max_id = max_id; | |
353 | shost->max_channel = 0; | |
354 | shost->max_cmd_len = 16; | |
355 | ||
356 | chba = iscsi_host_priv(shost); | |
357 | chba->cdev = cdev; | |
358 | chba->ndev = cdev->ports[i]; | |
359 | chba->shost = shost; | |
360 | ||
361 | log_debug(1 << CXGBI_DBG_DEV, | |
362 | "cdev 0x%p, p#%d %s: chba 0x%p.\n", | |
363 | cdev, i, cdev->ports[i]->name, chba); | |
364 | ||
365 | pci_dev_get(cdev->pdev); | |
366 | err = iscsi_host_add(shost, &cdev->pdev->dev); | |
367 | if (err) { | |
368 | pr_info("cdev 0x%p, p#%d %s, host add failed.\n", | |
369 | cdev, i, cdev->ports[i]->name); | |
370 | pci_dev_put(cdev->pdev); | |
371 | scsi_host_put(shost); | |
372 | goto err_out; | |
373 | } | |
374 | ||
375 | cdev->hbas[i] = chba; | |
376 | } | |
377 | ||
378 | return 0; | |
379 | ||
380 | err_out: | |
381 | cxgbi_hbas_remove(cdev); | |
382 | return err; | |
383 | } | |
384 | EXPORT_SYMBOL_GPL(cxgbi_hbas_add); | |
385 | ||
386 | /* | |
387 | * iSCSI offload | |
388 | * | |
389 | * - source port management | |
390 | * To find a free source port in the port allocation map we use a very simple | |
391 | * rotor scheme to look for the next free port. | |
392 | * | |
393 | * If a source port has been specified make sure that it doesn't collide with | |
394 | * our normal source port allocation map. If it's outside the range of our | |
395 | * allocation/deallocation scheme just let them use it. | |
396 | * | |
397 | * If the source port is outside our allocation range, the caller is | |
398 | * responsible for keeping track of their port usage. | |
399 | */ | |
400 | static int sock_get_port(struct cxgbi_sock *csk) | |
401 | { | |
402 | struct cxgbi_device *cdev = csk->cdev; | |
403 | struct cxgbi_ports_map *pmap = &cdev->pmap; | |
404 | unsigned int start; | |
405 | int idx; | |
fc8d0590 | 406 | __be16 *port; |
9ba682f0 | 407 | |
408 | if (!pmap->max_connect) { | |
409 | pr_err("cdev 0x%p, p#%u %s, NO port map.\n", | |
410 | cdev, csk->port_id, cdev->ports[csk->port_id]->name); | |
411 | return -EADDRNOTAVAIL; | |
412 | } | |
413 | ||
fc8d0590 AB |
414 | if (csk->csk_family == AF_INET) |
415 | port = &csk->saddr.sin_port; | |
416 | else /* ipv6 */ | |
417 | port = &csk->saddr6.sin6_port; | |
418 | ||
419 | if (*port) { | |
9ba682f0 | 420 | pr_err("source port NON-ZERO %u.\n", |
fc8d0590 | 421 | ntohs(*port)); |
9ba682f0 | 422 | return -EADDRINUSE; |
423 | } | |
424 | ||
425 | spin_lock_bh(&pmap->lock); | |
426 | if (pmap->used >= pmap->max_connect) { | |
427 | spin_unlock_bh(&pmap->lock); | |
428 | pr_info("cdev 0x%p, p#%u %s, ALL ports used.\n", | |
429 | cdev, csk->port_id, cdev->ports[csk->port_id]->name); | |
430 | return -EADDRNOTAVAIL; | |
431 | } | |
432 | ||
433 | start = idx = pmap->next; | |
434 | do { | |
435 | if (++idx >= pmap->max_connect) | |
436 | idx = 0; | |
437 | if (!pmap->port_csk[idx]) { | |
438 | pmap->used++; | |
fc8d0590 | 439 | *port = htons(pmap->sport_base + idx); |
9ba682f0 | 440 | pmap->next = idx; |
441 | pmap->port_csk[idx] = csk; | |
442 | spin_unlock_bh(&pmap->lock); | |
443 | cxgbi_sock_get(csk); | |
444 | log_debug(1 << CXGBI_DBG_SOCK, | |
445 | "cdev 0x%p, p#%u %s, p %u, %u.\n", | |
446 | cdev, csk->port_id, | |
447 | cdev->ports[csk->port_id]->name, | |
448 | pmap->sport_base + idx, pmap->next); | |
449 | return 0; | |
450 | } | |
451 | } while (idx != start); | |
452 | spin_unlock_bh(&pmap->lock); | |
453 | ||
454 | /* should not happen */ | |
455 | pr_warn("cdev 0x%p, p#%u %s, next %u?\n", | |
456 | cdev, csk->port_id, cdev->ports[csk->port_id]->name, | |
457 | pmap->next); | |
458 | return -EADDRNOTAVAIL; | |
459 | } | |
460 | ||
461 | static void sock_put_port(struct cxgbi_sock *csk) | |
462 | { | |
463 | struct cxgbi_device *cdev = csk->cdev; | |
464 | struct cxgbi_ports_map *pmap = &cdev->pmap; | |
fc8d0590 | 465 | __be16 *port; |
9ba682f0 | 466 | |
fc8d0590 AB |
467 | if (csk->csk_family == AF_INET) |
468 | port = &csk->saddr.sin_port; | |
469 | else /* ipv6 */ | |
470 | port = &csk->saddr6.sin6_port; | |
9ba682f0 | 471 | |
fc8d0590 AB |
472 | if (*port) { |
473 | int idx = ntohs(*port) - pmap->sport_base; | |
474 | ||
475 | *port = 0; | |
9ba682f0 | 476 | if (idx < 0 || idx >= pmap->max_connect) { |
477 | pr_err("cdev 0x%p, p#%u %s, port %u OOR.\n", | |
478 | cdev, csk->port_id, | |
479 | cdev->ports[csk->port_id]->name, | |
fc8d0590 | 480 | ntohs(*port)); |
9ba682f0 | 481 | return; |
482 | } | |
483 | ||
484 | spin_lock_bh(&pmap->lock); | |
485 | pmap->port_csk[idx] = NULL; | |
486 | pmap->used--; | |
487 | spin_unlock_bh(&pmap->lock); | |
488 | ||
489 | log_debug(1 << CXGBI_DBG_SOCK, | |
490 | "cdev 0x%p, p#%u %s, release %u.\n", | |
491 | cdev, csk->port_id, cdev->ports[csk->port_id]->name, | |
492 | pmap->sport_base + idx); | |
493 | ||
494 | cxgbi_sock_put(csk); | |
495 | } | |
496 | } | |
497 | ||
498 | /* | |
499 | * iscsi tcp connection | |
500 | */ | |
501 | void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *csk) | |
502 | { | |
503 | if (csk->cpl_close) { | |
504 | kfree_skb(csk->cpl_close); | |
505 | csk->cpl_close = NULL; | |
506 | } | |
507 | if (csk->cpl_abort_req) { | |
508 | kfree_skb(csk->cpl_abort_req); | |
509 | csk->cpl_abort_req = NULL; | |
510 | } | |
511 | if (csk->cpl_abort_rpl) { | |
512 | kfree_skb(csk->cpl_abort_rpl); | |
513 | csk->cpl_abort_rpl = NULL; | |
514 | } | |
515 | } | |
516 | EXPORT_SYMBOL_GPL(cxgbi_sock_free_cpl_skbs); | |
517 | ||
518 | static struct cxgbi_sock *cxgbi_sock_create(struct cxgbi_device *cdev) | |
519 | { | |
520 | struct cxgbi_sock *csk = kzalloc(sizeof(*csk), GFP_NOIO); | |
521 | ||
522 | if (!csk) { | |
523 | pr_info("alloc csk %zu failed.\n", sizeof(*csk)); | |
524 | return NULL; | |
525 | } | |
526 | ||
527 | if (cdev->csk_alloc_cpls(csk) < 0) { | |
528 | pr_info("csk 0x%p, alloc cpls failed.\n", csk); | |
529 | kfree(csk); | |
530 | return NULL; | |
531 | } | |
532 | ||
533 | spin_lock_init(&csk->lock); | |
534 | kref_init(&csk->refcnt); | |
535 | skb_queue_head_init(&csk->receive_queue); | |
536 | skb_queue_head_init(&csk->write_queue); | |
537 | setup_timer(&csk->retry_timer, NULL, (unsigned long)csk); | |
538 | rwlock_init(&csk->callback_lock); | |
539 | csk->cdev = cdev; | |
540 | csk->flags = 0; | |
541 | cxgbi_sock_set_state(csk, CTP_CLOSED); | |
542 | ||
543 | log_debug(1 << CXGBI_DBG_SOCK, "cdev 0x%p, new csk 0x%p.\n", cdev, csk); | |
544 | ||
545 | return csk; | |
546 | } | |
547 | ||
f4bfd99f DM |
548 | static struct rtable *find_route_ipv4(struct flowi4 *fl4, |
549 | __be32 saddr, __be32 daddr, | |
78fbfd8a | 550 | __be16 sport, __be16 dport, u8 tos) |
9ba682f0 | 551 | { |
552 | struct rtable *rt; | |
9ba682f0 | 553 | |
f4bfd99f | 554 | rt = ip_route_output_ports(&init_net, fl4, NULL, daddr, saddr, |
78fbfd8a | 555 | dport, sport, IPPROTO_TCP, tos, 0); |
b23dd4fe | 556 | if (IS_ERR(rt)) |
9ba682f0 | 557 | return NULL; |
558 | ||
559 | return rt; | |
560 | } | |
561 | ||
562 | static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr) | |
563 | { | |
564 | struct sockaddr_in *daddr = (struct sockaddr_in *)dst_addr; | |
565 | struct dst_entry *dst; | |
566 | struct net_device *ndev; | |
567 | struct cxgbi_device *cdev; | |
568 | struct rtable *rt = NULL; | |
a58b61e5 | 569 | struct neighbour *n; |
f4bfd99f | 570 | struct flowi4 fl4; |
9ba682f0 | 571 | struct cxgbi_sock *csk = NULL; |
572 | unsigned int mtu = 0; | |
573 | int port = 0xFFFF; | |
574 | int err = 0; | |
575 | ||
f4bfd99f | 576 | rt = find_route_ipv4(&fl4, 0, daddr->sin_addr.s_addr, 0, daddr->sin_port, 0); |
9ba682f0 | 577 | if (!rt) { |
578 | pr_info("no route to ipv4 0x%x, port %u.\n", | |
fc8d0590 AB |
579 | be32_to_cpu(daddr->sin_addr.s_addr), |
580 | be16_to_cpu(daddr->sin_port)); | |
9ba682f0 | 581 | err = -ENETUNREACH; |
582 | goto err_out; | |
583 | } | |
584 | dst = &rt->dst; | |
0b399d46 | 585 | n = dst_neigh_lookup(dst, &daddr->sin_addr.s_addr); |
a58b61e5 DM |
586 | if (!n) { |
587 | err = -ENODEV; | |
588 | goto rel_rt; | |
589 | } | |
590 | ndev = n->dev; | |
9ba682f0 | 591 | |
592 | if (rt->rt_flags & (RTCF_MULTICAST | RTCF_BROADCAST)) { | |
593 | pr_info("multi-cast route %pI4, port %u, dev %s.\n", | |
594 | &daddr->sin_addr.s_addr, ntohs(daddr->sin_port), | |
595 | ndev->name); | |
596 | err = -ENETUNREACH; | |
0b399d46 | 597 | goto rel_neigh; |
9ba682f0 | 598 | } |
599 | ||
600 | if (ndev->flags & IFF_LOOPBACK) { | |
601 | ndev = ip_dev_find(&init_net, daddr->sin_addr.s_addr); | |
602 | mtu = ndev->mtu; | |
603 | pr_info("rt dev %s, loopback -> %s, mtu %u.\n", | |
a58b61e5 | 604 | n->dev->name, ndev->name, mtu); |
9ba682f0 | 605 | } |
606 | ||
9ba682f0 | 607 | cdev = cxgbi_device_find_by_netdev(ndev, &port); |
608 | if (!cdev) { | |
609 | pr_info("dst %pI4, %s, NOT cxgbi device.\n", | |
610 | &daddr->sin_addr.s_addr, ndev->name); | |
611 | err = -ENETUNREACH; | |
0b399d46 | 612 | goto rel_neigh; |
9ba682f0 | 613 | } |
614 | log_debug(1 << CXGBI_DBG_SOCK, | |
615 | "route to %pI4 :%u, ndev p#%d,%s, cdev 0x%p.\n", | |
616 | &daddr->sin_addr.s_addr, ntohs(daddr->sin_port), | |
617 | port, ndev->name, cdev); | |
618 | ||
619 | csk = cxgbi_sock_create(cdev); | |
620 | if (!csk) { | |
621 | err = -ENOMEM; | |
0b399d46 | 622 | goto rel_neigh; |
9ba682f0 | 623 | } |
624 | csk->cdev = cdev; | |
625 | csk->port_id = port; | |
626 | csk->mtu = mtu; | |
627 | csk->dst = dst; | |
fc8d0590 AB |
628 | |
629 | csk->csk_family = AF_INET; | |
9ba682f0 | 630 | csk->daddr.sin_addr.s_addr = daddr->sin_addr.s_addr; |
631 | csk->daddr.sin_port = daddr->sin_port; | |
c71b9b66 | 632 | csk->daddr.sin_family = daddr->sin_family; |
fc8d0590 | 633 | csk->saddr.sin_family = daddr->sin_family; |
f4bfd99f | 634 | csk->saddr.sin_addr.s_addr = fl4.saddr; |
0b399d46 | 635 | neigh_release(n); |
9ba682f0 | 636 | |
637 | return csk; | |
638 | ||
0b399d46 DM |
639 | rel_neigh: |
640 | neigh_release(n); | |
641 | ||
9ba682f0 | 642 | rel_rt: |
643 | ip_rt_put(rt); | |
644 | if (csk) | |
645 | cxgbi_sock_closed(csk); | |
646 | err_out: | |
647 | return ERR_PTR(err); | |
648 | } | |
649 | ||
e81fbf6c | 650 | #if IS_ENABLED(CONFIG_IPV6) |
fc8d0590 AB |
651 | static struct rt6_info *find_route_ipv6(const struct in6_addr *saddr, |
652 | const struct in6_addr *daddr) | |
653 | { | |
654 | struct flowi6 fl; | |
655 | ||
656 | if (saddr) | |
657 | memcpy(&fl.saddr, saddr, sizeof(struct in6_addr)); | |
658 | if (daddr) | |
659 | memcpy(&fl.daddr, daddr, sizeof(struct in6_addr)); | |
660 | return (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl); | |
661 | } | |
662 | ||
663 | static struct cxgbi_sock *cxgbi_check_route6(struct sockaddr *dst_addr) | |
664 | { | |
665 | struct sockaddr_in6 *daddr6 = (struct sockaddr_in6 *)dst_addr; | |
666 | struct dst_entry *dst; | |
667 | struct net_device *ndev; | |
668 | struct cxgbi_device *cdev; | |
669 | struct rt6_info *rt = NULL; | |
670 | struct neighbour *n; | |
671 | struct in6_addr pref_saddr; | |
672 | struct cxgbi_sock *csk = NULL; | |
673 | unsigned int mtu = 0; | |
674 | int port = 0xFFFF; | |
675 | int err = 0; | |
676 | ||
677 | rt = find_route_ipv6(NULL, &daddr6->sin6_addr); | |
678 | ||
679 | if (!rt) { | |
680 | pr_info("no route to ipv6 %pI6 port %u\n", | |
681 | daddr6->sin6_addr.s6_addr, | |
682 | be16_to_cpu(daddr6->sin6_port)); | |
683 | err = -ENETUNREACH; | |
684 | goto err_out; | |
685 | } | |
686 | ||
687 | dst = &rt->dst; | |
688 | ||
689 | n = dst_neigh_lookup(dst, &daddr6->sin6_addr); | |
690 | ||
691 | if (!n) { | |
692 | pr_info("%pI6, port %u, dst no neighbour.\n", | |
693 | daddr6->sin6_addr.s6_addr, | |
694 | be16_to_cpu(daddr6->sin6_port)); | |
695 | err = -ENETUNREACH; | |
696 | goto rel_rt; | |
697 | } | |
698 | ndev = n->dev; | |
699 | ||
700 | if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) { | |
701 | pr_info("multi-cast route %pI6 port %u, dev %s.\n", | |
702 | daddr6->sin6_addr.s6_addr, | |
703 | ntohs(daddr6->sin6_port), ndev->name); | |
704 | err = -ENETUNREACH; | |
705 | goto rel_rt; | |
706 | } | |
707 | ||
708 | cdev = cxgbi_device_find_by_netdev(ndev, &port); | |
709 | if (!cdev) | |
710 | cdev = cxgbi_device_find_by_mac(ndev, &port); | |
711 | if (!cdev) { | |
712 | pr_info("dst %pI6 %s, NOT cxgbi device.\n", | |
713 | daddr6->sin6_addr.s6_addr, ndev->name); | |
714 | err = -ENETUNREACH; | |
715 | goto rel_rt; | |
716 | } | |
717 | log_debug(1 << CXGBI_DBG_SOCK, | |
718 | "route to %pI6 :%u, ndev p#%d,%s, cdev 0x%p.\n", | |
719 | daddr6->sin6_addr.s6_addr, ntohs(daddr6->sin6_port), port, | |
720 | ndev->name, cdev); | |
721 | ||
722 | csk = cxgbi_sock_create(cdev); | |
723 | if (!csk) { | |
724 | err = -ENOMEM; | |
725 | goto rel_rt; | |
726 | } | |
727 | csk->cdev = cdev; | |
728 | csk->port_id = port; | |
729 | csk->mtu = mtu; | |
730 | csk->dst = dst; | |
731 | ||
732 | if (ipv6_addr_any(&rt->rt6i_prefsrc.addr)) { | |
733 | struct inet6_dev *idev = ip6_dst_idev((struct dst_entry *)rt); | |
734 | ||
735 | err = ipv6_dev_get_saddr(&init_net, idev ? idev->dev : NULL, | |
736 | &daddr6->sin6_addr, 0, &pref_saddr); | |
737 | if (err) { | |
738 | pr_info("failed to get source address to reach %pI6\n", | |
739 | &daddr6->sin6_addr); | |
740 | goto rel_rt; | |
741 | } | |
742 | } else { | |
743 | pref_saddr = rt->rt6i_prefsrc.addr; | |
744 | } | |
745 | ||
746 | csk->csk_family = AF_INET6; | |
747 | csk->daddr6.sin6_addr = daddr6->sin6_addr; | |
748 | csk->daddr6.sin6_port = daddr6->sin6_port; | |
749 | csk->daddr6.sin6_family = daddr6->sin6_family; | |
750 | csk->saddr6.sin6_addr = pref_saddr; | |
751 | ||
752 | neigh_release(n); | |
753 | return csk; | |
754 | ||
755 | rel_rt: | |
756 | if (n) | |
757 | neigh_release(n); | |
758 | ||
759 | ip6_rt_put(rt); | |
760 | if (csk) | |
761 | cxgbi_sock_closed(csk); | |
762 | err_out: | |
763 | return ERR_PTR(err); | |
764 | } | |
e81fbf6c | 765 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
fc8d0590 | 766 | |
9ba682f0 | 767 | void cxgbi_sock_established(struct cxgbi_sock *csk, unsigned int snd_isn, |
768 | unsigned int opt) | |
769 | { | |
770 | csk->write_seq = csk->snd_nxt = csk->snd_una = snd_isn; | |
771 | dst_confirm(csk->dst); | |
772 | smp_mb(); | |
773 | cxgbi_sock_set_state(csk, CTP_ESTABLISHED); | |
774 | } | |
775 | EXPORT_SYMBOL_GPL(cxgbi_sock_established); | |
776 | ||
777 | static void cxgbi_inform_iscsi_conn_closing(struct cxgbi_sock *csk) | |
778 | { | |
779 | log_debug(1 << CXGBI_DBG_SOCK, | |
780 | "csk 0x%p, state %u, flags 0x%lx, conn 0x%p.\n", | |
781 | csk, csk->state, csk->flags, csk->user_data); | |
782 | ||
783 | if (csk->state != CTP_ESTABLISHED) { | |
e3d2ad8c | 784 | read_lock_bh(&csk->callback_lock); |
9ba682f0 | 785 | if (csk->user_data) |
786 | iscsi_conn_failure(csk->user_data, | |
787 | ISCSI_ERR_CONN_FAILED); | |
e3d2ad8c | 788 | read_unlock_bh(&csk->callback_lock); |
9ba682f0 | 789 | } |
790 | } | |
791 | ||
792 | void cxgbi_sock_closed(struct cxgbi_sock *csk) | |
793 | { | |
794 | log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", | |
795 | csk, (csk)->state, (csk)->flags, (csk)->tid); | |
796 | cxgbi_sock_set_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED); | |
797 | if (csk->state == CTP_ACTIVE_OPEN || csk->state == CTP_CLOSED) | |
798 | return; | |
799 | if (csk->saddr.sin_port) | |
800 | sock_put_port(csk); | |
801 | if (csk->dst) | |
802 | dst_release(csk->dst); | |
803 | csk->cdev->csk_release_offload_resources(csk); | |
804 | cxgbi_sock_set_state(csk, CTP_CLOSED); | |
805 | cxgbi_inform_iscsi_conn_closing(csk); | |
806 | cxgbi_sock_put(csk); | |
807 | } | |
808 | EXPORT_SYMBOL_GPL(cxgbi_sock_closed); | |
809 | ||
810 | static void need_active_close(struct cxgbi_sock *csk) | |
811 | { | |
812 | int data_lost; | |
813 | int close_req = 0; | |
814 | ||
815 | log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", | |
816 | csk, (csk)->state, (csk)->flags, (csk)->tid); | |
817 | spin_lock_bh(&csk->lock); | |
818 | dst_confirm(csk->dst); | |
819 | data_lost = skb_queue_len(&csk->receive_queue); | |
820 | __skb_queue_purge(&csk->receive_queue); | |
821 | ||
822 | if (csk->state == CTP_ACTIVE_OPEN) | |
823 | cxgbi_sock_set_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED); | |
824 | else if (csk->state == CTP_ESTABLISHED) { | |
825 | close_req = 1; | |
826 | cxgbi_sock_set_state(csk, CTP_ACTIVE_CLOSE); | |
827 | } else if (csk->state == CTP_PASSIVE_CLOSE) { | |
828 | close_req = 1; | |
829 | cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_2); | |
830 | } | |
831 | ||
832 | if (close_req) { | |
833 | if (data_lost) | |
834 | csk->cdev->csk_send_abort_req(csk); | |
835 | else | |
836 | csk->cdev->csk_send_close_req(csk); | |
837 | } | |
838 | ||
839 | spin_unlock_bh(&csk->lock); | |
840 | } | |
841 | ||
842 | void cxgbi_sock_fail_act_open(struct cxgbi_sock *csk, int errno) | |
843 | { | |
844 | pr_info("csk 0x%p,%u,%lx, %pI4:%u-%pI4:%u, err %d.\n", | |
845 | csk, csk->state, csk->flags, | |
846 | &csk->saddr.sin_addr.s_addr, csk->saddr.sin_port, | |
847 | &csk->daddr.sin_addr.s_addr, csk->daddr.sin_port, | |
848 | errno); | |
849 | ||
850 | cxgbi_sock_set_state(csk, CTP_CONNECTING); | |
851 | csk->err = errno; | |
852 | cxgbi_sock_closed(csk); | |
853 | } | |
854 | EXPORT_SYMBOL_GPL(cxgbi_sock_fail_act_open); | |
855 | ||
856 | void cxgbi_sock_act_open_req_arp_failure(void *handle, struct sk_buff *skb) | |
857 | { | |
858 | struct cxgbi_sock *csk = (struct cxgbi_sock *)skb->sk; | |
859 | ||
860 | log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", | |
861 | csk, (csk)->state, (csk)->flags, (csk)->tid); | |
862 | cxgbi_sock_get(csk); | |
863 | spin_lock_bh(&csk->lock); | |
864 | if (csk->state == CTP_ACTIVE_OPEN) | |
865 | cxgbi_sock_fail_act_open(csk, -EHOSTUNREACH); | |
866 | spin_unlock_bh(&csk->lock); | |
867 | cxgbi_sock_put(csk); | |
868 | __kfree_skb(skb); | |
869 | } | |
870 | EXPORT_SYMBOL_GPL(cxgbi_sock_act_open_req_arp_failure); | |
871 | ||
872 | void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *csk) | |
873 | { | |
874 | cxgbi_sock_get(csk); | |
875 | spin_lock_bh(&csk->lock); | |
876 | if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { | |
877 | if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_RCVD)) | |
878 | cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_RCVD); | |
879 | else { | |
880 | cxgbi_sock_clear_flag(csk, CTPF_ABORT_RPL_RCVD); | |
881 | cxgbi_sock_clear_flag(csk, CTPF_ABORT_RPL_PENDING); | |
882 | if (cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) | |
883 | pr_err("csk 0x%p,%u,0x%lx,%u,ABT_RPL_RSS.\n", | |
884 | csk, csk->state, csk->flags, csk->tid); | |
885 | cxgbi_sock_closed(csk); | |
886 | } | |
887 | } | |
888 | spin_unlock_bh(&csk->lock); | |
889 | cxgbi_sock_put(csk); | |
890 | } | |
891 | EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_abort_rpl); | |
892 | ||
893 | void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *csk) | |
894 | { | |
895 | log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", | |
896 | csk, (csk)->state, (csk)->flags, (csk)->tid); | |
897 | cxgbi_sock_get(csk); | |
898 | spin_lock_bh(&csk->lock); | |
899 | ||
900 | if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) | |
901 | goto done; | |
902 | ||
903 | switch (csk->state) { | |
904 | case CTP_ESTABLISHED: | |
905 | cxgbi_sock_set_state(csk, CTP_PASSIVE_CLOSE); | |
906 | break; | |
907 | case CTP_ACTIVE_CLOSE: | |
908 | cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_2); | |
909 | break; | |
910 | case CTP_CLOSE_WAIT_1: | |
911 | cxgbi_sock_closed(csk); | |
912 | break; | |
913 | case CTP_ABORTING: | |
914 | break; | |
915 | default: | |
916 | pr_err("csk 0x%p,%u,0x%lx,%u, bad state.\n", | |
917 | csk, csk->state, csk->flags, csk->tid); | |
918 | } | |
919 | cxgbi_inform_iscsi_conn_closing(csk); | |
920 | done: | |
921 | spin_unlock_bh(&csk->lock); | |
922 | cxgbi_sock_put(csk); | |
923 | } | |
924 | EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_peer_close); | |
925 | ||
926 | void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *csk, u32 snd_nxt) | |
927 | { | |
928 | log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", | |
929 | csk, (csk)->state, (csk)->flags, (csk)->tid); | |
930 | cxgbi_sock_get(csk); | |
931 | spin_lock_bh(&csk->lock); | |
932 | ||
933 | csk->snd_una = snd_nxt - 1; | |
934 | if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) | |
935 | goto done; | |
936 | ||
937 | switch (csk->state) { | |
938 | case CTP_ACTIVE_CLOSE: | |
939 | cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_1); | |
940 | break; | |
941 | case CTP_CLOSE_WAIT_1: | |
942 | case CTP_CLOSE_WAIT_2: | |
943 | cxgbi_sock_closed(csk); | |
944 | break; | |
945 | case CTP_ABORTING: | |
946 | break; | |
947 | default: | |
948 | pr_err("csk 0x%p,%u,0x%lx,%u, bad state.\n", | |
949 | csk, csk->state, csk->flags, csk->tid); | |
950 | } | |
951 | done: | |
952 | spin_unlock_bh(&csk->lock); | |
953 | cxgbi_sock_put(csk); | |
954 | } | |
955 | EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_close_conn_rpl); | |
956 | ||
957 | void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *csk, unsigned int credits, | |
958 | unsigned int snd_una, int seq_chk) | |
959 | { | |
960 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
961 | "csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, snd_una %u,%d.\n", | |
962 | csk, csk->state, csk->flags, csk->tid, credits, | |
963 | csk->wr_cred, csk->wr_una_cred, snd_una, seq_chk); | |
964 | ||
965 | spin_lock_bh(&csk->lock); | |
966 | ||
967 | csk->wr_cred += credits; | |
968 | if (csk->wr_una_cred > csk->wr_max_cred - csk->wr_cred) | |
969 | csk->wr_una_cred = csk->wr_max_cred - csk->wr_cred; | |
970 | ||
971 | while (credits) { | |
972 | struct sk_buff *p = cxgbi_sock_peek_wr(csk); | |
973 | ||
974 | if (unlikely(!p)) { | |
975 | pr_err("csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, empty.\n", | |
976 | csk, csk->state, csk->flags, csk->tid, credits, | |
977 | csk->wr_cred, csk->wr_una_cred); | |
978 | break; | |
979 | } | |
980 | ||
981 | if (unlikely(credits < p->csum)) { | |
982 | pr_warn("csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, < %u.\n", | |
983 | csk, csk->state, csk->flags, csk->tid, | |
984 | credits, csk->wr_cred, csk->wr_una_cred, | |
985 | p->csum); | |
986 | p->csum -= credits; | |
987 | break; | |
988 | } else { | |
989 | cxgbi_sock_dequeue_wr(csk); | |
990 | credits -= p->csum; | |
991 | kfree_skb(p); | |
992 | } | |
993 | } | |
994 | ||
995 | cxgbi_sock_check_wr_invariants(csk); | |
996 | ||
997 | if (seq_chk) { | |
998 | if (unlikely(before(snd_una, csk->snd_una))) { | |
999 | pr_warn("csk 0x%p,%u,0x%lx,%u, snd_una %u/%u.", | |
1000 | csk, csk->state, csk->flags, csk->tid, snd_una, | |
1001 | csk->snd_una); | |
1002 | goto done; | |
1003 | } | |
1004 | ||
1005 | if (csk->snd_una != snd_una) { | |
1006 | csk->snd_una = snd_una; | |
1007 | dst_confirm(csk->dst); | |
1008 | } | |
1009 | } | |
1010 | ||
1011 | if (skb_queue_len(&csk->write_queue)) { | |
1012 | if (csk->cdev->csk_push_tx_frames(csk, 0)) | |
1013 | cxgbi_conn_tx_open(csk); | |
1014 | } else | |
1015 | cxgbi_conn_tx_open(csk); | |
1016 | done: | |
1017 | spin_unlock_bh(&csk->lock); | |
1018 | } | |
1019 | EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_wr_ack); | |
1020 | ||
1021 | static unsigned int cxgbi_sock_find_best_mtu(struct cxgbi_sock *csk, | |
1022 | unsigned short mtu) | |
1023 | { | |
1024 | int i = 0; | |
1025 | ||
1026 | while (i < csk->cdev->nmtus - 1 && csk->cdev->mtus[i + 1] <= mtu) | |
1027 | ++i; | |
1028 | ||
1029 | return i; | |
1030 | } | |
1031 | ||
1032 | unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *csk, unsigned int pmtu) | |
1033 | { | |
1034 | unsigned int idx; | |
1035 | struct dst_entry *dst = csk->dst; | |
1036 | ||
0dbaee3b | 1037 | csk->advmss = dst_metric_advmss(dst); |
9ba682f0 | 1038 | |
1039 | if (csk->advmss > pmtu - 40) | |
1040 | csk->advmss = pmtu - 40; | |
1041 | if (csk->advmss < csk->cdev->mtus[0] - 40) | |
1042 | csk->advmss = csk->cdev->mtus[0] - 40; | |
1043 | idx = cxgbi_sock_find_best_mtu(csk, csk->advmss + 40); | |
1044 | ||
1045 | return idx; | |
1046 | } | |
1047 | EXPORT_SYMBOL_GPL(cxgbi_sock_select_mss); | |
1048 | ||
1049 | void cxgbi_sock_skb_entail(struct cxgbi_sock *csk, struct sk_buff *skb) | |
1050 | { | |
1051 | cxgbi_skcb_tcp_seq(skb) = csk->write_seq; | |
1052 | __skb_queue_tail(&csk->write_queue, skb); | |
1053 | } | |
1054 | EXPORT_SYMBOL_GPL(cxgbi_sock_skb_entail); | |
1055 | ||
1056 | void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *csk) | |
1057 | { | |
1058 | struct sk_buff *skb; | |
1059 | ||
1060 | while ((skb = cxgbi_sock_dequeue_wr(csk)) != NULL) | |
1061 | kfree_skb(skb); | |
1062 | } | |
1063 | EXPORT_SYMBOL_GPL(cxgbi_sock_purge_wr_queue); | |
1064 | ||
1065 | void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *csk) | |
1066 | { | |
1067 | int pending = cxgbi_sock_count_pending_wrs(csk); | |
1068 | ||
1069 | if (unlikely(csk->wr_cred + pending != csk->wr_max_cred)) | |
1070 | pr_err("csk 0x%p, tid %u, credit %u + %u != %u.\n", | |
1071 | csk, csk->tid, csk->wr_cred, pending, csk->wr_max_cred); | |
1072 | } | |
1073 | EXPORT_SYMBOL_GPL(cxgbi_sock_check_wr_invariants); | |
1074 | ||
1075 | static int cxgbi_sock_send_pdus(struct cxgbi_sock *csk, struct sk_buff *skb) | |
1076 | { | |
1077 | struct cxgbi_device *cdev = csk->cdev; | |
1078 | struct sk_buff *next; | |
1079 | int err, copied = 0; | |
1080 | ||
1081 | spin_lock_bh(&csk->lock); | |
1082 | ||
1083 | if (csk->state != CTP_ESTABLISHED) { | |
1084 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
1085 | "csk 0x%p,%u,0x%lx,%u, EAGAIN.\n", | |
1086 | csk, csk->state, csk->flags, csk->tid); | |
1087 | err = -EAGAIN; | |
1088 | goto out_err; | |
1089 | } | |
1090 | ||
1091 | if (csk->err) { | |
1092 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
1093 | "csk 0x%p,%u,0x%lx,%u, EPIPE %d.\n", | |
1094 | csk, csk->state, csk->flags, csk->tid, csk->err); | |
1095 | err = -EPIPE; | |
1096 | goto out_err; | |
1097 | } | |
1098 | ||
1099 | if (csk->write_seq - csk->snd_una >= cdev->snd_win) { | |
1100 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
1101 | "csk 0x%p,%u,0x%lx,%u, FULL %u-%u >= %u.\n", | |
1102 | csk, csk->state, csk->flags, csk->tid, csk->write_seq, | |
1103 | csk->snd_una, cdev->snd_win); | |
1104 | err = -ENOBUFS; | |
1105 | goto out_err; | |
1106 | } | |
1107 | ||
1108 | while (skb) { | |
1109 | int frags = skb_shinfo(skb)->nr_frags + | |
1110 | (skb->len != skb->data_len); | |
1111 | ||
1112 | if (unlikely(skb_headroom(skb) < cdev->skb_tx_rsvd)) { | |
1113 | pr_err("csk 0x%p, skb head %u < %u.\n", | |
1114 | csk, skb_headroom(skb), cdev->skb_tx_rsvd); | |
1115 | err = -EINVAL; | |
1116 | goto out_err; | |
1117 | } | |
1118 | ||
1119 | if (frags >= SKB_WR_LIST_SIZE) { | |
1120 | pr_err("csk 0x%p, frags %d, %u,%u >%u.\n", | |
1121 | csk, skb_shinfo(skb)->nr_frags, skb->len, | |
1122 | skb->data_len, (uint)(SKB_WR_LIST_SIZE)); | |
1123 | err = -EINVAL; | |
1124 | goto out_err; | |
1125 | } | |
1126 | ||
1127 | next = skb->next; | |
1128 | skb->next = NULL; | |
1129 | cxgbi_skcb_set_flag(skb, SKCBF_TX_NEED_HDR); | |
1130 | cxgbi_sock_skb_entail(csk, skb); | |
1131 | copied += skb->len; | |
1132 | csk->write_seq += skb->len + | |
1133 | cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); | |
1134 | skb = next; | |
1135 | } | |
1136 | done: | |
1137 | if (likely(skb_queue_len(&csk->write_queue))) | |
1138 | cdev->csk_push_tx_frames(csk, 1); | |
1139 | spin_unlock_bh(&csk->lock); | |
1140 | return copied; | |
1141 | ||
1142 | out_err: | |
1143 | if (copied == 0 && err == -EPIPE) | |
1144 | copied = csk->err ? csk->err : -EPIPE; | |
1145 | else | |
1146 | copied = err; | |
1147 | goto done; | |
1148 | } | |
1149 | ||
1150 | /* | |
1151 | * Direct Data Placement - | |
1152 | * Directly place the iSCSI Data-In or Data-Out PDU's payload into pre-posted | |
1153 | * final destination host-memory buffers based on the Initiator Task Tag (ITT) | |
1154 | * in Data-In or Target Task Tag (TTT) in Data-Out PDUs. | |
1155 | * The host memory address is programmed into h/w in the format of pagepod | |
1156 | * entries. | |
1157 | * The location of the pagepod entry is encoded into ddp tag which is used as | |
1158 | * the base for ITT/TTT. | |
1159 | */ | |
1160 | ||
1161 | static unsigned char ddp_page_order[DDP_PGIDX_MAX] = {0, 1, 2, 4}; | |
1162 | static unsigned char ddp_page_shift[DDP_PGIDX_MAX] = {12, 13, 14, 16}; | |
1163 | static unsigned char page_idx = DDP_PGIDX_MAX; | |
1164 | ||
1165 | static unsigned char sw_tag_idx_bits; | |
1166 | static unsigned char sw_tag_age_bits; | |
1167 | ||
1168 | /* | |
1169 | * Direct-Data Placement page size adjustment | |
1170 | */ | |
1171 | static int ddp_adjust_page_table(void) | |
1172 | { | |
1173 | int i; | |
1174 | unsigned int base_order, order; | |
1175 | ||
1176 | if (PAGE_SIZE < (1UL << ddp_page_shift[0])) { | |
1177 | pr_info("PAGE_SIZE 0x%lx too small, min 0x%lx\n", | |
1178 | PAGE_SIZE, 1UL << ddp_page_shift[0]); | |
1179 | return -EINVAL; | |
1180 | } | |
1181 | ||
1182 | base_order = get_order(1UL << ddp_page_shift[0]); | |
1183 | order = get_order(1UL << PAGE_SHIFT); | |
1184 | ||
1185 | for (i = 0; i < DDP_PGIDX_MAX; i++) { | |
1186 | /* first is the kernel page size, then just doubling */ | |
1187 | ddp_page_order[i] = order - base_order + i; | |
1188 | ddp_page_shift[i] = PAGE_SHIFT + i; | |
1189 | } | |
1190 | return 0; | |
1191 | } | |
1192 | ||
1193 | static int ddp_find_page_index(unsigned long pgsz) | |
1194 | { | |
1195 | int i; | |
1196 | ||
1197 | for (i = 0; i < DDP_PGIDX_MAX; i++) { | |
1198 | if (pgsz == (1UL << ddp_page_shift[i])) | |
1199 | return i; | |
1200 | } | |
1201 | pr_info("ddp page size %lu not supported.\n", pgsz); | |
1202 | return DDP_PGIDX_MAX; | |
1203 | } | |
1204 | ||
1205 | static void ddp_setup_host_page_size(void) | |
1206 | { | |
1207 | if (page_idx == DDP_PGIDX_MAX) { | |
1208 | page_idx = ddp_find_page_index(PAGE_SIZE); | |
1209 | ||
1210 | if (page_idx == DDP_PGIDX_MAX) { | |
1211 | pr_info("system PAGE %lu, update hw.\n", PAGE_SIZE); | |
1212 | if (ddp_adjust_page_table() < 0) { | |
1213 | pr_info("PAGE %lu, disable ddp.\n", PAGE_SIZE); | |
1214 | return; | |
1215 | } | |
1216 | page_idx = ddp_find_page_index(PAGE_SIZE); | |
1217 | } | |
1218 | pr_info("system PAGE %lu, ddp idx %u.\n", PAGE_SIZE, page_idx); | |
1219 | } | |
1220 | } | |
1221 | ||
1222 | void cxgbi_ddp_page_size_factor(int *pgsz_factor) | |
1223 | { | |
1224 | int i; | |
1225 | ||
1226 | for (i = 0; i < DDP_PGIDX_MAX; i++) | |
1227 | pgsz_factor[i] = ddp_page_order[i]; | |
1228 | } | |
1229 | EXPORT_SYMBOL_GPL(cxgbi_ddp_page_size_factor); | |
1230 | ||
1231 | /* | |
1232 | * DDP setup & teardown | |
1233 | */ | |
1234 | ||
1235 | void cxgbi_ddp_ppod_set(struct cxgbi_pagepod *ppod, | |
1236 | struct cxgbi_pagepod_hdr *hdr, | |
1237 | struct cxgbi_gather_list *gl, unsigned int gidx) | |
1238 | { | |
1239 | int i; | |
1240 | ||
1241 | memcpy(ppod, hdr, sizeof(*hdr)); | |
1242 | for (i = 0; i < (PPOD_PAGES_MAX + 1); i++, gidx++) { | |
1243 | ppod->addr[i] = gidx < gl->nelem ? | |
1244 | cpu_to_be64(gl->phys_addr[gidx]) : 0ULL; | |
1245 | } | |
1246 | } | |
1247 | EXPORT_SYMBOL_GPL(cxgbi_ddp_ppod_set); | |
1248 | ||
1249 | void cxgbi_ddp_ppod_clear(struct cxgbi_pagepod *ppod) | |
1250 | { | |
1251 | memset(ppod, 0, sizeof(*ppod)); | |
1252 | } | |
1253 | EXPORT_SYMBOL_GPL(cxgbi_ddp_ppod_clear); | |
1254 | ||
1255 | static inline int ddp_find_unused_entries(struct cxgbi_ddp_info *ddp, | |
1256 | unsigned int start, unsigned int max, | |
1257 | unsigned int count, | |
1258 | struct cxgbi_gather_list *gl) | |
1259 | { | |
1260 | unsigned int i, j, k; | |
1261 | ||
1262 | /* not enough entries */ | |
1263 | if ((max - start) < count) { | |
1264 | log_debug(1 << CXGBI_DBG_DDP, | |
1265 | "NOT enough entries %u+%u < %u.\n", start, count, max); | |
1266 | return -EBUSY; | |
1267 | } | |
1268 | ||
1269 | max -= count; | |
1270 | spin_lock(&ddp->map_lock); | |
1271 | for (i = start; i < max;) { | |
1272 | for (j = 0, k = i; j < count; j++, k++) { | |
1273 | if (ddp->gl_map[k]) | |
1274 | break; | |
1275 | } | |
1276 | if (j == count) { | |
1277 | for (j = 0, k = i; j < count; j++, k++) | |
1278 | ddp->gl_map[k] = gl; | |
1279 | spin_unlock(&ddp->map_lock); | |
1280 | return i; | |
1281 | } | |
1282 | i += j + 1; | |
1283 | } | |
1284 | spin_unlock(&ddp->map_lock); | |
1285 | log_debug(1 << CXGBI_DBG_DDP, | |
1286 | "NO suitable entries %u available.\n", count); | |
1287 | return -EBUSY; | |
1288 | } | |
1289 | ||
1290 | static inline void ddp_unmark_entries(struct cxgbi_ddp_info *ddp, | |
1291 | int start, int count) | |
1292 | { | |
1293 | spin_lock(&ddp->map_lock); | |
1294 | memset(&ddp->gl_map[start], 0, | |
1295 | count * sizeof(struct cxgbi_gather_list *)); | |
1296 | spin_unlock(&ddp->map_lock); | |
1297 | } | |
1298 | ||
1299 | static inline void ddp_gl_unmap(struct pci_dev *pdev, | |
1300 | struct cxgbi_gather_list *gl) | |
1301 | { | |
1302 | int i; | |
1303 | ||
1304 | for (i = 0; i < gl->nelem; i++) | |
1305 | dma_unmap_page(&pdev->dev, gl->phys_addr[i], PAGE_SIZE, | |
1306 | PCI_DMA_FROMDEVICE); | |
1307 | } | |
1308 | ||
1309 | static inline int ddp_gl_map(struct pci_dev *pdev, | |
1310 | struct cxgbi_gather_list *gl) | |
1311 | { | |
1312 | int i; | |
1313 | ||
1314 | for (i = 0; i < gl->nelem; i++) { | |
1315 | gl->phys_addr[i] = dma_map_page(&pdev->dev, gl->pages[i], 0, | |
1316 | PAGE_SIZE, | |
1317 | PCI_DMA_FROMDEVICE); | |
1318 | if (unlikely(dma_mapping_error(&pdev->dev, gl->phys_addr[i]))) { | |
1319 | log_debug(1 << CXGBI_DBG_DDP, | |
1320 | "page %d 0x%p, 0x%p dma mapping err.\n", | |
1321 | i, gl->pages[i], pdev); | |
1322 | goto unmap; | |
1323 | } | |
1324 | } | |
1325 | return i; | |
1326 | unmap: | |
1327 | if (i) { | |
1328 | unsigned int nelem = gl->nelem; | |
1329 | ||
1330 | gl->nelem = i; | |
1331 | ddp_gl_unmap(pdev, gl); | |
1332 | gl->nelem = nelem; | |
1333 | } | |
1334 | return -EINVAL; | |
1335 | } | |
1336 | ||
1337 | static void ddp_release_gl(struct cxgbi_gather_list *gl, | |
1338 | struct pci_dev *pdev) | |
1339 | { | |
1340 | ddp_gl_unmap(pdev, gl); | |
1341 | kfree(gl); | |
1342 | } | |
1343 | ||
1344 | static struct cxgbi_gather_list *ddp_make_gl(unsigned int xferlen, | |
1345 | struct scatterlist *sgl, | |
1346 | unsigned int sgcnt, | |
1347 | struct pci_dev *pdev, | |
1348 | gfp_t gfp) | |
1349 | { | |
1350 | struct cxgbi_gather_list *gl; | |
1351 | struct scatterlist *sg = sgl; | |
1352 | struct page *sgpage = sg_page(sg); | |
1353 | unsigned int sglen = sg->length; | |
1354 | unsigned int sgoffset = sg->offset; | |
1355 | unsigned int npages = (xferlen + sgoffset + PAGE_SIZE - 1) >> | |
1356 | PAGE_SHIFT; | |
1357 | int i = 1, j = 0; | |
1358 | ||
1359 | if (xferlen < DDP_THRESHOLD) { | |
1360 | log_debug(1 << CXGBI_DBG_DDP, | |
1361 | "xfer %u < threshold %u, no ddp.\n", | |
1362 | xferlen, DDP_THRESHOLD); | |
1363 | return NULL; | |
1364 | } | |
1365 | ||
1366 | gl = kzalloc(sizeof(struct cxgbi_gather_list) + | |
1367 | npages * (sizeof(dma_addr_t) + | |
1368 | sizeof(struct page *)), gfp); | |
1369 | if (!gl) { | |
1370 | log_debug(1 << CXGBI_DBG_DDP, | |
1371 | "xfer %u, %u pages, OOM.\n", xferlen, npages); | |
1372 | return NULL; | |
1373 | } | |
1374 | ||
1375 | log_debug(1 << CXGBI_DBG_DDP, | |
1376 | "xfer %u, sgl %u, gl max %u.\n", xferlen, sgcnt, npages); | |
1377 | ||
1378 | gl->pages = (struct page **)&gl->phys_addr[npages]; | |
1379 | gl->nelem = npages; | |
1380 | gl->length = xferlen; | |
1381 | gl->offset = sgoffset; | |
1382 | gl->pages[0] = sgpage; | |
1383 | ||
1384 | for (i = 1, sg = sg_next(sgl), j = 0; i < sgcnt; | |
1385 | i++, sg = sg_next(sg)) { | |
1386 | struct page *page = sg_page(sg); | |
1387 | ||
1388 | if (sgpage == page && sg->offset == sgoffset + sglen) | |
1389 | sglen += sg->length; | |
1390 | else { | |
1391 | /* make sure the sgl is fit for ddp: | |
1392 | * each has the same page size, and | |
1393 | * all of the middle pages are used completely | |
1394 | */ | |
1395 | if ((j && sgoffset) || ((i != sgcnt - 1) && | |
1396 | ((sglen + sgoffset) & ~PAGE_MASK))) { | |
1397 | log_debug(1 << CXGBI_DBG_DDP, | |
1398 | "page %d/%u, %u + %u.\n", | |
1399 | i, sgcnt, sgoffset, sglen); | |
1400 | goto error_out; | |
1401 | } | |
1402 | ||
1403 | j++; | |
1404 | if (j == gl->nelem || sg->offset) { | |
1405 | log_debug(1 << CXGBI_DBG_DDP, | |
1406 | "page %d/%u, offset %u.\n", | |
1407 | j, gl->nelem, sg->offset); | |
1408 | goto error_out; | |
1409 | } | |
1410 | gl->pages[j] = page; | |
1411 | sglen = sg->length; | |
1412 | sgoffset = sg->offset; | |
1413 | sgpage = page; | |
1414 | } | |
1415 | } | |
1416 | gl->nelem = ++j; | |
1417 | ||
1418 | if (ddp_gl_map(pdev, gl) < 0) | |
1419 | goto error_out; | |
1420 | ||
1421 | return gl; | |
1422 | ||
1423 | error_out: | |
1424 | kfree(gl); | |
1425 | return NULL; | |
1426 | } | |
1427 | ||
1428 | static void ddp_tag_release(struct cxgbi_hba *chba, u32 tag) | |
1429 | { | |
1430 | struct cxgbi_device *cdev = chba->cdev; | |
1431 | struct cxgbi_ddp_info *ddp = cdev->ddp; | |
1432 | u32 idx; | |
1433 | ||
1434 | idx = (tag >> PPOD_IDX_SHIFT) & ddp->idx_mask; | |
1435 | if (idx < ddp->nppods) { | |
1436 | struct cxgbi_gather_list *gl = ddp->gl_map[idx]; | |
1437 | unsigned int npods; | |
1438 | ||
1439 | if (!gl || !gl->nelem) { | |
1440 | pr_warn("tag 0x%x, idx %u, gl 0x%p, %u.\n", | |
1441 | tag, idx, gl, gl ? gl->nelem : 0); | |
1442 | return; | |
1443 | } | |
1444 | npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT; | |
1445 | log_debug(1 << CXGBI_DBG_DDP, | |
1446 | "tag 0x%x, release idx %u, npods %u.\n", | |
1447 | tag, idx, npods); | |
1448 | cdev->csk_ddp_clear(chba, tag, idx, npods); | |
1449 | ddp_unmark_entries(ddp, idx, npods); | |
1450 | ddp_release_gl(gl, ddp->pdev); | |
1451 | } else | |
1452 | pr_warn("tag 0x%x, idx %u > max %u.\n", tag, idx, ddp->nppods); | |
1453 | } | |
1454 | ||
1455 | static int ddp_tag_reserve(struct cxgbi_sock *csk, unsigned int tid, | |
1456 | u32 sw_tag, u32 *tagp, struct cxgbi_gather_list *gl, | |
1457 | gfp_t gfp) | |
1458 | { | |
1459 | struct cxgbi_device *cdev = csk->cdev; | |
1460 | struct cxgbi_ddp_info *ddp = cdev->ddp; | |
1461 | struct cxgbi_tag_format *tformat = &cdev->tag_format; | |
1462 | struct cxgbi_pagepod_hdr hdr; | |
1463 | unsigned int npods; | |
1464 | int idx = -1; | |
1465 | int err = -ENOMEM; | |
1466 | u32 tag; | |
1467 | ||
1468 | npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT; | |
1469 | if (ddp->idx_last == ddp->nppods) | |
1470 | idx = ddp_find_unused_entries(ddp, 0, ddp->nppods, | |
1471 | npods, gl); | |
1472 | else { | |
1473 | idx = ddp_find_unused_entries(ddp, ddp->idx_last + 1, | |
1474 | ddp->nppods, npods, | |
1475 | gl); | |
1476 | if (idx < 0 && ddp->idx_last >= npods) { | |
1477 | idx = ddp_find_unused_entries(ddp, 0, | |
1478 | min(ddp->idx_last + npods, ddp->nppods), | |
1479 | npods, gl); | |
1480 | } | |
1481 | } | |
1482 | if (idx < 0) { | |
1483 | log_debug(1 << CXGBI_DBG_DDP, | |
1484 | "xferlen %u, gl %u, npods %u NO DDP.\n", | |
1485 | gl->length, gl->nelem, npods); | |
1486 | return idx; | |
1487 | } | |
1488 | ||
9ba682f0 | 1489 | tag = cxgbi_ddp_tag_base(tformat, sw_tag); |
1490 | tag |= idx << PPOD_IDX_SHIFT; | |
1491 | ||
1492 | hdr.rsvd = 0; | |
1493 | hdr.vld_tid = htonl(PPOD_VALID_FLAG | PPOD_TID(tid)); | |
1494 | hdr.pgsz_tag_clr = htonl(tag & ddp->rsvd_tag_mask); | |
1495 | hdr.max_offset = htonl(gl->length); | |
1496 | hdr.page_offset = htonl(gl->offset); | |
1497 | ||
1498 | err = cdev->csk_ddp_set(csk, &hdr, idx, npods, gl); | |
b8ce8b59 | 1499 | if (err < 0) |
9ba682f0 | 1500 | goto unmark_entries; |
9ba682f0 | 1501 | |
1502 | ddp->idx_last = idx; | |
1503 | log_debug(1 << CXGBI_DBG_DDP, | |
1504 | "xfer %u, gl %u,%u, tid 0x%x, tag 0x%x->0x%x(%u,%u).\n", | |
1505 | gl->length, gl->nelem, gl->offset, tid, sw_tag, tag, idx, | |
1506 | npods); | |
1507 | *tagp = tag; | |
1508 | return 0; | |
1509 | ||
1510 | unmark_entries: | |
1511 | ddp_unmark_entries(ddp, idx, npods); | |
1512 | return err; | |
1513 | } | |
1514 | ||
1515 | int cxgbi_ddp_reserve(struct cxgbi_sock *csk, unsigned int *tagp, | |
1516 | unsigned int sw_tag, unsigned int xferlen, | |
1517 | struct scatterlist *sgl, unsigned int sgcnt, gfp_t gfp) | |
1518 | { | |
1519 | struct cxgbi_device *cdev = csk->cdev; | |
1520 | struct cxgbi_tag_format *tformat = &cdev->tag_format; | |
1521 | struct cxgbi_gather_list *gl; | |
1522 | int err; | |
1523 | ||
1524 | if (page_idx >= DDP_PGIDX_MAX || !cdev->ddp || | |
1525 | xferlen < DDP_THRESHOLD) { | |
1526 | log_debug(1 << CXGBI_DBG_DDP, | |
1527 | "pgidx %u, xfer %u, NO ddp.\n", page_idx, xferlen); | |
1528 | return -EINVAL; | |
1529 | } | |
1530 | ||
1531 | if (!cxgbi_sw_tag_usable(tformat, sw_tag)) { | |
1532 | log_debug(1 << CXGBI_DBG_DDP, | |
1533 | "sw_tag 0x%x NOT usable.\n", sw_tag); | |
1534 | return -EINVAL; | |
1535 | } | |
1536 | ||
1537 | gl = ddp_make_gl(xferlen, sgl, sgcnt, cdev->pdev, gfp); | |
1538 | if (!gl) | |
1539 | return -ENOMEM; | |
1540 | ||
1541 | err = ddp_tag_reserve(csk, csk->tid, sw_tag, tagp, gl, gfp); | |
1542 | if (err < 0) | |
1543 | ddp_release_gl(gl, cdev->pdev); | |
1544 | ||
1545 | return err; | |
1546 | } | |
1547 | ||
1548 | static void ddp_destroy(struct kref *kref) | |
1549 | { | |
1550 | struct cxgbi_ddp_info *ddp = container_of(kref, | |
1551 | struct cxgbi_ddp_info, | |
1552 | refcnt); | |
1553 | struct cxgbi_device *cdev = ddp->cdev; | |
1554 | int i = 0; | |
1555 | ||
1556 | pr_info("kref 0, destroy ddp 0x%p, cdev 0x%p.\n", ddp, cdev); | |
1557 | ||
1558 | while (i < ddp->nppods) { | |
1559 | struct cxgbi_gather_list *gl = ddp->gl_map[i]; | |
1560 | ||
1561 | if (gl) { | |
1562 | int npods = (gl->nelem + PPOD_PAGES_MAX - 1) | |
1563 | >> PPOD_PAGES_SHIFT; | |
1564 | pr_info("cdev 0x%p, ddp %d + %d.\n", cdev, i, npods); | |
1565 | kfree(gl); | |
9ba682f0 | 1566 | i += npods; |
1567 | } else | |
1568 | i++; | |
1569 | } | |
1570 | cxgbi_free_big_mem(ddp); | |
1571 | } | |
1572 | ||
1573 | int cxgbi_ddp_cleanup(struct cxgbi_device *cdev) | |
1574 | { | |
1575 | struct cxgbi_ddp_info *ddp = cdev->ddp; | |
1576 | ||
1577 | log_debug(1 << CXGBI_DBG_DDP, | |
1578 | "cdev 0x%p, release ddp 0x%p.\n", cdev, ddp); | |
1579 | cdev->ddp = NULL; | |
1580 | if (ddp) | |
1581 | return kref_put(&ddp->refcnt, ddp_destroy); | |
1582 | return 0; | |
1583 | } | |
1584 | EXPORT_SYMBOL_GPL(cxgbi_ddp_cleanup); | |
1585 | ||
1586 | int cxgbi_ddp_init(struct cxgbi_device *cdev, | |
1587 | unsigned int llimit, unsigned int ulimit, | |
1588 | unsigned int max_txsz, unsigned int max_rxsz) | |
1589 | { | |
1590 | struct cxgbi_ddp_info *ddp; | |
1591 | unsigned int ppmax, bits; | |
1592 | ||
1593 | ppmax = (ulimit - llimit + 1) >> PPOD_SIZE_SHIFT; | |
1594 | bits = __ilog2_u32(ppmax) + 1; | |
1595 | if (bits > PPOD_IDX_MAX_SIZE) | |
1596 | bits = PPOD_IDX_MAX_SIZE; | |
1597 | ppmax = (1 << (bits - 1)) - 1; | |
1598 | ||
1599 | ddp = cxgbi_alloc_big_mem(sizeof(struct cxgbi_ddp_info) + | |
1600 | ppmax * (sizeof(struct cxgbi_gather_list *) + | |
1601 | sizeof(struct sk_buff *)), | |
1602 | GFP_KERNEL); | |
1603 | if (!ddp) { | |
1604 | pr_warn("cdev 0x%p, ddp ppmax %u OOM.\n", cdev, ppmax); | |
1605 | return -ENOMEM; | |
1606 | } | |
1607 | ddp->gl_map = (struct cxgbi_gather_list **)(ddp + 1); | |
9ba682f0 | 1608 | cdev->ddp = ddp; |
1609 | ||
1610 | spin_lock_init(&ddp->map_lock); | |
1611 | kref_init(&ddp->refcnt); | |
1612 | ||
1613 | ddp->cdev = cdev; | |
1614 | ddp->pdev = cdev->pdev; | |
1615 | ddp->llimit = llimit; | |
1616 | ddp->ulimit = ulimit; | |
1617 | ddp->max_txsz = min_t(unsigned int, max_txsz, ULP2_MAX_PKT_SIZE); | |
1618 | ddp->max_rxsz = min_t(unsigned int, max_rxsz, ULP2_MAX_PKT_SIZE); | |
1619 | ddp->nppods = ppmax; | |
1620 | ddp->idx_last = ppmax; | |
1621 | ddp->idx_bits = bits; | |
1622 | ddp->idx_mask = (1 << bits) - 1; | |
1623 | ddp->rsvd_tag_mask = (1 << (bits + PPOD_IDX_SHIFT)) - 1; | |
1624 | ||
1625 | cdev->tag_format.sw_bits = sw_tag_idx_bits + sw_tag_age_bits; | |
1626 | cdev->tag_format.rsvd_bits = ddp->idx_bits; | |
1627 | cdev->tag_format.rsvd_shift = PPOD_IDX_SHIFT; | |
1628 | cdev->tag_format.rsvd_mask = (1 << cdev->tag_format.rsvd_bits) - 1; | |
1629 | ||
1630 | pr_info("%s tag format, sw %u, rsvd %u,%u, mask 0x%x.\n", | |
1631 | cdev->ports[0]->name, cdev->tag_format.sw_bits, | |
1632 | cdev->tag_format.rsvd_bits, cdev->tag_format.rsvd_shift, | |
1633 | cdev->tag_format.rsvd_mask); | |
1634 | ||
1635 | cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, | |
1636 | ddp->max_txsz - ISCSI_PDU_NONPAYLOAD_LEN); | |
1637 | cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, | |
1638 | ddp->max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN); | |
1639 | ||
1640 | log_debug(1 << CXGBI_DBG_DDP, | |
1641 | "%s max payload size: %u/%u, %u/%u.\n", | |
1642 | cdev->ports[0]->name, cdev->tx_max_size, ddp->max_txsz, | |
1643 | cdev->rx_max_size, ddp->max_rxsz); | |
1644 | return 0; | |
1645 | } | |
1646 | EXPORT_SYMBOL_GPL(cxgbi_ddp_init); | |
1647 | ||
1648 | /* | |
1649 | * APIs interacting with open-iscsi libraries | |
1650 | */ | |
1651 | ||
1652 | static unsigned char padding[4]; | |
1653 | ||
1654 | static void task_release_itt(struct iscsi_task *task, itt_t hdr_itt) | |
1655 | { | |
1656 | struct scsi_cmnd *sc = task->sc; | |
1657 | struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data; | |
1658 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
1659 | struct cxgbi_hba *chba = cconn->chba; | |
1660 | struct cxgbi_tag_format *tformat = &chba->cdev->tag_format; | |
1661 | u32 tag = ntohl((__force u32)hdr_itt); | |
1662 | ||
1663 | log_debug(1 << CXGBI_DBG_DDP, | |
1664 | "cdev 0x%p, release tag 0x%x.\n", chba->cdev, tag); | |
1665 | if (sc && | |
1666 | (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE) && | |
1667 | cxgbi_is_ddp_tag(tformat, tag)) | |
1668 | ddp_tag_release(chba, tag); | |
1669 | } | |
1670 | ||
1671 | static int task_reserve_itt(struct iscsi_task *task, itt_t *hdr_itt) | |
1672 | { | |
1673 | struct scsi_cmnd *sc = task->sc; | |
1674 | struct iscsi_conn *conn = task->conn; | |
1675 | struct iscsi_session *sess = conn->session; | |
1676 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
1677 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
1678 | struct cxgbi_hba *chba = cconn->chba; | |
1679 | struct cxgbi_tag_format *tformat = &chba->cdev->tag_format; | |
1680 | u32 sw_tag = (sess->age << cconn->task_idx_bits) | task->itt; | |
1681 | u32 tag = 0; | |
1682 | int err = -EINVAL; | |
1683 | ||
1684 | if (sc && | |
1685 | (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE)) { | |
1686 | err = cxgbi_ddp_reserve(cconn->cep->csk, &tag, sw_tag, | |
1687 | scsi_in(sc)->length, | |
1688 | scsi_in(sc)->table.sgl, | |
1689 | scsi_in(sc)->table.nents, | |
1690 | GFP_ATOMIC); | |
1691 | if (err < 0) | |
1692 | log_debug(1 << CXGBI_DBG_DDP, | |
1693 | "csk 0x%p, R task 0x%p, %u,%u, no ddp.\n", | |
1694 | cconn->cep->csk, task, scsi_in(sc)->length, | |
1695 | scsi_in(sc)->table.nents); | |
1696 | } | |
1697 | ||
1698 | if (err < 0) | |
1699 | tag = cxgbi_set_non_ddp_tag(tformat, sw_tag); | |
1700 | /* the itt need to sent in big-endian order */ | |
1701 | *hdr_itt = (__force itt_t)htonl(tag); | |
1702 | ||
1703 | log_debug(1 << CXGBI_DBG_DDP, | |
1704 | "cdev 0x%p, task 0x%p, 0x%x(0x%x,0x%x)->0x%x/0x%x.\n", | |
1705 | chba->cdev, task, sw_tag, task->itt, sess->age, tag, *hdr_itt); | |
1706 | return 0; | |
1707 | } | |
1708 | ||
1709 | void cxgbi_parse_pdu_itt(struct iscsi_conn *conn, itt_t itt, int *idx, int *age) | |
1710 | { | |
1711 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
1712 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
1713 | struct cxgbi_device *cdev = cconn->chba->cdev; | |
1714 | u32 tag = ntohl((__force u32) itt); | |
1715 | u32 sw_bits; | |
1716 | ||
1717 | sw_bits = cxgbi_tag_nonrsvd_bits(&cdev->tag_format, tag); | |
1718 | if (idx) | |
1719 | *idx = sw_bits & ((1 << cconn->task_idx_bits) - 1); | |
1720 | if (age) | |
1721 | *age = (sw_bits >> cconn->task_idx_bits) & ISCSI_AGE_MASK; | |
1722 | ||
1723 | log_debug(1 << CXGBI_DBG_DDP, | |
1724 | "cdev 0x%p, tag 0x%x/0x%x, -> 0x%x(0x%x,0x%x).\n", | |
1725 | cdev, tag, itt, sw_bits, idx ? *idx : 0xFFFFF, | |
1726 | age ? *age : 0xFF); | |
1727 | } | |
1728 | EXPORT_SYMBOL_GPL(cxgbi_parse_pdu_itt); | |
1729 | ||
1730 | void cxgbi_conn_tx_open(struct cxgbi_sock *csk) | |
1731 | { | |
1732 | struct iscsi_conn *conn = csk->user_data; | |
1733 | ||
1734 | if (conn) { | |
1735 | log_debug(1 << CXGBI_DBG_SOCK, | |
1736 | "csk 0x%p, cid %d.\n", csk, conn->id); | |
1737 | iscsi_conn_queue_work(conn); | |
1738 | } | |
1739 | } | |
1740 | EXPORT_SYMBOL_GPL(cxgbi_conn_tx_open); | |
1741 | ||
1742 | /* | |
1743 | * pdu receive, interact with libiscsi_tcp | |
1744 | */ | |
1745 | static inline int read_pdu_skb(struct iscsi_conn *conn, | |
1746 | struct sk_buff *skb, | |
1747 | unsigned int offset, | |
1748 | int offloaded) | |
1749 | { | |
1750 | int status = 0; | |
1751 | int bytes_read; | |
1752 | ||
1753 | bytes_read = iscsi_tcp_recv_skb(conn, skb, offset, offloaded, &status); | |
1754 | switch (status) { | |
1755 | case ISCSI_TCP_CONN_ERR: | |
1756 | pr_info("skb 0x%p, off %u, %d, TCP_ERR.\n", | |
1757 | skb, offset, offloaded); | |
1758 | return -EIO; | |
1759 | case ISCSI_TCP_SUSPENDED: | |
1760 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1761 | "skb 0x%p, off %u, %d, TCP_SUSPEND, rc %d.\n", | |
1762 | skb, offset, offloaded, bytes_read); | |
1763 | /* no transfer - just have caller flush queue */ | |
1764 | return bytes_read; | |
1765 | case ISCSI_TCP_SKB_DONE: | |
1766 | pr_info("skb 0x%p, off %u, %d, TCP_SKB_DONE.\n", | |
1767 | skb, offset, offloaded); | |
1768 | /* | |
1769 | * pdus should always fit in the skb and we should get | |
1770 | * segment done notifcation. | |
1771 | */ | |
1772 | iscsi_conn_printk(KERN_ERR, conn, "Invalid pdu or skb."); | |
1773 | return -EFAULT; | |
1774 | case ISCSI_TCP_SEGMENT_DONE: | |
1775 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1776 | "skb 0x%p, off %u, %d, TCP_SEG_DONE, rc %d.\n", | |
1777 | skb, offset, offloaded, bytes_read); | |
1778 | return bytes_read; | |
1779 | default: | |
1780 | pr_info("skb 0x%p, off %u, %d, invalid status %d.\n", | |
1781 | skb, offset, offloaded, status); | |
1782 | return -EINVAL; | |
1783 | } | |
1784 | } | |
1785 | ||
1786 | static int skb_read_pdu_bhs(struct iscsi_conn *conn, struct sk_buff *skb) | |
1787 | { | |
1788 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
1789 | ||
1790 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1791 | "conn 0x%p, skb 0x%p, len %u, flag 0x%lx.\n", | |
1792 | conn, skb, skb->len, cxgbi_skcb_flags(skb)); | |
1793 | ||
1794 | if (!iscsi_tcp_recv_segment_is_hdr(tcp_conn)) { | |
1795 | pr_info("conn 0x%p, skb 0x%p, not hdr.\n", conn, skb); | |
1796 | iscsi_conn_failure(conn, ISCSI_ERR_PROTO); | |
1797 | return -EIO; | |
1798 | } | |
1799 | ||
1800 | if (conn->hdrdgst_en && | |
1801 | cxgbi_skcb_test_flag(skb, SKCBF_RX_HCRC_ERR)) { | |
1802 | pr_info("conn 0x%p, skb 0x%p, hcrc.\n", conn, skb); | |
1803 | iscsi_conn_failure(conn, ISCSI_ERR_HDR_DGST); | |
1804 | return -EIO; | |
1805 | } | |
1806 | ||
1807 | return read_pdu_skb(conn, skb, 0, 0); | |
1808 | } | |
1809 | ||
1810 | static int skb_read_pdu_data(struct iscsi_conn *conn, struct sk_buff *lskb, | |
1811 | struct sk_buff *skb, unsigned int offset) | |
1812 | { | |
1813 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
1814 | bool offloaded = 0; | |
1815 | int opcode = tcp_conn->in.hdr->opcode & ISCSI_OPCODE_MASK; | |
1816 | ||
1817 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1818 | "conn 0x%p, skb 0x%p, len %u, flag 0x%lx.\n", | |
1819 | conn, skb, skb->len, cxgbi_skcb_flags(skb)); | |
1820 | ||
1821 | if (conn->datadgst_en && | |
1822 | cxgbi_skcb_test_flag(lskb, SKCBF_RX_DCRC_ERR)) { | |
1823 | pr_info("conn 0x%p, skb 0x%p, dcrc 0x%lx.\n", | |
1824 | conn, lskb, cxgbi_skcb_flags(lskb)); | |
1825 | iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST); | |
1826 | return -EIO; | |
1827 | } | |
1828 | ||
1829 | if (iscsi_tcp_recv_segment_is_hdr(tcp_conn)) | |
1830 | return 0; | |
1831 | ||
1832 | /* coalesced, add header digest length */ | |
1833 | if (lskb == skb && conn->hdrdgst_en) | |
1834 | offset += ISCSI_DIGEST_SIZE; | |
1835 | ||
1836 | if (cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA_DDPD)) | |
1837 | offloaded = 1; | |
1838 | ||
1839 | if (opcode == ISCSI_OP_SCSI_DATA_IN) | |
1840 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1841 | "skb 0x%p, op 0x%x, itt 0x%x, %u %s ddp'ed.\n", | |
1842 | skb, opcode, ntohl(tcp_conn->in.hdr->itt), | |
1843 | tcp_conn->in.datalen, offloaded ? "is" : "not"); | |
1844 | ||
1845 | return read_pdu_skb(conn, skb, offset, offloaded); | |
1846 | } | |
1847 | ||
1848 | static void csk_return_rx_credits(struct cxgbi_sock *csk, int copied) | |
1849 | { | |
1850 | struct cxgbi_device *cdev = csk->cdev; | |
1851 | int must_send; | |
1852 | u32 credits; | |
1853 | ||
1854 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
fc385045 | 1855 | "csk 0x%p,%u,0x%lx,%u, seq %u, wup %u, thre %u, %u.\n", |
9ba682f0 | 1856 | csk, csk->state, csk->flags, csk->tid, csk->copied_seq, |
1857 | csk->rcv_wup, cdev->rx_credit_thres, | |
1858 | cdev->rcv_win); | |
1859 | ||
1860 | if (csk->state != CTP_ESTABLISHED) | |
1861 | return; | |
1862 | ||
1863 | credits = csk->copied_seq - csk->rcv_wup; | |
1864 | if (unlikely(!credits)) | |
1865 | return; | |
1866 | if (unlikely(cdev->rx_credit_thres == 0)) | |
1867 | return; | |
1868 | ||
1869 | must_send = credits + 16384 >= cdev->rcv_win; | |
1870 | if (must_send || credits >= cdev->rx_credit_thres) | |
1871 | csk->rcv_wup += cdev->csk_send_rx_credits(csk, credits); | |
1872 | } | |
1873 | ||
1874 | void cxgbi_conn_pdu_ready(struct cxgbi_sock *csk) | |
1875 | { | |
1876 | struct cxgbi_device *cdev = csk->cdev; | |
1877 | struct iscsi_conn *conn = csk->user_data; | |
1878 | struct sk_buff *skb; | |
1879 | unsigned int read = 0; | |
1880 | int err = 0; | |
1881 | ||
1882 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1883 | "csk 0x%p, conn 0x%p.\n", csk, conn); | |
1884 | ||
1885 | if (unlikely(!conn || conn->suspend_rx)) { | |
1886 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1887 | "csk 0x%p, conn 0x%p, id %d, suspend_rx %lu!\n", | |
1888 | csk, conn, conn ? conn->id : 0xFF, | |
1889 | conn ? conn->suspend_rx : 0xFF); | |
9ba682f0 | 1890 | return; |
1891 | } | |
1892 | ||
1893 | while (!err) { | |
9ba682f0 | 1894 | skb = skb_peek(&csk->receive_queue); |
1895 | if (!skb || | |
1896 | !(cxgbi_skcb_test_flag(skb, SKCBF_RX_STATUS))) { | |
1897 | if (skb) | |
1898 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1899 | "skb 0x%p, NOT ready 0x%lx.\n", | |
1900 | skb, cxgbi_skcb_flags(skb)); | |
9ba682f0 | 1901 | break; |
1902 | } | |
1903 | __skb_unlink(skb, &csk->receive_queue); | |
9ba682f0 | 1904 | |
1905 | read += cxgbi_skcb_rx_pdulen(skb); | |
1906 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1907 | "csk 0x%p, skb 0x%p,%u,f 0x%lx, pdu len %u.\n", | |
1908 | csk, skb, skb->len, cxgbi_skcb_flags(skb), | |
1909 | cxgbi_skcb_rx_pdulen(skb)); | |
1910 | ||
1911 | if (cxgbi_skcb_test_flag(skb, SKCBF_RX_COALESCED)) { | |
1912 | err = skb_read_pdu_bhs(conn, skb); | |
e3d2ad8c | 1913 | if (err < 0) { |
1914 | pr_err("coalesced bhs, csk 0x%p, skb 0x%p,%u, " | |
1915 | "f 0x%lx, plen %u.\n", | |
1916 | csk, skb, skb->len, | |
1917 | cxgbi_skcb_flags(skb), | |
1918 | cxgbi_skcb_rx_pdulen(skb)); | |
1919 | goto skb_done; | |
1920 | } | |
9ba682f0 | 1921 | err = skb_read_pdu_data(conn, skb, skb, |
1922 | err + cdev->skb_rx_extra); | |
e3d2ad8c | 1923 | if (err < 0) |
1924 | pr_err("coalesced data, csk 0x%p, skb 0x%p,%u, " | |
1925 | "f 0x%lx, plen %u.\n", | |
1926 | csk, skb, skb->len, | |
1927 | cxgbi_skcb_flags(skb), | |
1928 | cxgbi_skcb_rx_pdulen(skb)); | |
9ba682f0 | 1929 | } else { |
1930 | err = skb_read_pdu_bhs(conn, skb); | |
e3d2ad8c | 1931 | if (err < 0) { |
1932 | pr_err("bhs, csk 0x%p, skb 0x%p,%u, " | |
1933 | "f 0x%lx, plen %u.\n", | |
1934 | csk, skb, skb->len, | |
1935 | cxgbi_skcb_flags(skb), | |
1936 | cxgbi_skcb_rx_pdulen(skb)); | |
1937 | goto skb_done; | |
1938 | } | |
1939 | ||
9ba682f0 | 1940 | if (cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) { |
1941 | struct sk_buff *dskb; | |
1942 | ||
9ba682f0 | 1943 | dskb = skb_peek(&csk->receive_queue); |
1944 | if (!dskb) { | |
e3d2ad8c | 1945 | pr_err("csk 0x%p, skb 0x%p,%u, f 0x%lx," |
1946 | " plen %u, NO data.\n", | |
1947 | csk, skb, skb->len, | |
1948 | cxgbi_skcb_flags(skb), | |
1949 | cxgbi_skcb_rx_pdulen(skb)); | |
1950 | err = -EIO; | |
1951 | goto skb_done; | |
9ba682f0 | 1952 | } |
1953 | __skb_unlink(dskb, &csk->receive_queue); | |
9ba682f0 | 1954 | |
1955 | err = skb_read_pdu_data(conn, skb, dskb, 0); | |
e3d2ad8c | 1956 | if (err < 0) |
1957 | pr_err("data, csk 0x%p, skb 0x%p,%u, " | |
1958 | "f 0x%lx, plen %u, dskb 0x%p," | |
1959 | "%u.\n", | |
1960 | csk, skb, skb->len, | |
1961 | cxgbi_skcb_flags(skb), | |
1962 | cxgbi_skcb_rx_pdulen(skb), | |
1963 | dskb, dskb->len); | |
9ba682f0 | 1964 | __kfree_skb(dskb); |
1965 | } else | |
1966 | err = skb_read_pdu_data(conn, skb, skb, 0); | |
1967 | } | |
e3d2ad8c | 1968 | skb_done: |
1969 | __kfree_skb(skb); | |
1970 | ||
9ba682f0 | 1971 | if (err < 0) |
1972 | break; | |
9ba682f0 | 1973 | } |
1974 | ||
1975 | log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, read %u.\n", csk, read); | |
1976 | if (read) { | |
1977 | csk->copied_seq += read; | |
1978 | csk_return_rx_credits(csk, read); | |
1979 | conn->rxdata_octets += read; | |
1980 | } | |
1981 | ||
1982 | if (err < 0) { | |
e3d2ad8c | 1983 | pr_info("csk 0x%p, 0x%p, rx failed %d, read %u.\n", |
1984 | csk, conn, err, read); | |
9ba682f0 | 1985 | iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); |
1986 | } | |
1987 | } | |
1988 | EXPORT_SYMBOL_GPL(cxgbi_conn_pdu_ready); | |
1989 | ||
1990 | static int sgl_seek_offset(struct scatterlist *sgl, unsigned int sgcnt, | |
1991 | unsigned int offset, unsigned int *off, | |
1992 | struct scatterlist **sgp) | |
1993 | { | |
1994 | int i; | |
1995 | struct scatterlist *sg; | |
1996 | ||
1997 | for_each_sg(sgl, sg, sgcnt, i) { | |
1998 | if (offset < sg->length) { | |
1999 | *off = offset; | |
2000 | *sgp = sg; | |
2001 | return 0; | |
2002 | } | |
2003 | offset -= sg->length; | |
2004 | } | |
2005 | return -EFAULT; | |
2006 | } | |
2007 | ||
2008 | static int sgl_read_to_frags(struct scatterlist *sg, unsigned int sgoffset, | |
6a39a16a | 2009 | unsigned int dlen, struct page_frag *frags, |
9ba682f0 | 2010 | int frag_max) |
2011 | { | |
2012 | unsigned int datalen = dlen; | |
2013 | unsigned int sglen = sg->length - sgoffset; | |
2014 | struct page *page = sg_page(sg); | |
2015 | int i; | |
2016 | ||
2017 | i = 0; | |
2018 | do { | |
2019 | unsigned int copy; | |
2020 | ||
2021 | if (!sglen) { | |
2022 | sg = sg_next(sg); | |
2023 | if (!sg) { | |
2024 | pr_warn("sg %d NULL, len %u/%u.\n", | |
2025 | i, datalen, dlen); | |
2026 | return -EINVAL; | |
2027 | } | |
2028 | sgoffset = 0; | |
2029 | sglen = sg->length; | |
2030 | page = sg_page(sg); | |
2031 | ||
2032 | } | |
2033 | copy = min(datalen, sglen); | |
2034 | if (i && page == frags[i - 1].page && | |
2035 | sgoffset + sg->offset == | |
6a39a16a IC |
2036 | frags[i - 1].offset + frags[i - 1].size) { |
2037 | frags[i - 1].size += copy; | |
9ba682f0 | 2038 | } else { |
2039 | if (i >= frag_max) { | |
2040 | pr_warn("too many pages %u, dlen %u.\n", | |
2041 | frag_max, dlen); | |
2042 | return -EINVAL; | |
2043 | } | |
2044 | ||
2045 | frags[i].page = page; | |
6a39a16a IC |
2046 | frags[i].offset = sg->offset + sgoffset; |
2047 | frags[i].size = copy; | |
9ba682f0 | 2048 | i++; |
2049 | } | |
2050 | datalen -= copy; | |
2051 | sgoffset += copy; | |
2052 | sglen -= copy; | |
2053 | } while (datalen); | |
2054 | ||
2055 | return i; | |
2056 | } | |
2057 | ||
2058 | int cxgbi_conn_alloc_pdu(struct iscsi_task *task, u8 opcode) | |
2059 | { | |
2060 | struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data; | |
2061 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
2062 | struct cxgbi_device *cdev = cconn->chba->cdev; | |
2063 | struct iscsi_conn *conn = task->conn; | |
2064 | struct iscsi_tcp_task *tcp_task = task->dd_data; | |
e3d2ad8c | 2065 | struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); |
9ba682f0 | 2066 | struct scsi_cmnd *sc = task->sc; |
2067 | int headroom = SKB_TX_ISCSI_PDU_HEADER_MAX; | |
2068 | ||
2069 | tcp_task->dd_data = tdata; | |
2070 | task->hdr = NULL; | |
2071 | ||
2072 | if (SKB_MAX_HEAD(cdev->skb_tx_rsvd) > (512 * MAX_SKB_FRAGS) && | |
2073 | (opcode == ISCSI_OP_SCSI_DATA_OUT || | |
2074 | (opcode == ISCSI_OP_SCSI_CMD && | |
2075 | (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_TO_DEVICE)))) | |
2076 | /* data could goes into skb head */ | |
2077 | headroom += min_t(unsigned int, | |
2078 | SKB_MAX_HEAD(cdev->skb_tx_rsvd), | |
2079 | conn->max_xmit_dlength); | |
2080 | ||
2081 | tdata->skb = alloc_skb(cdev->skb_tx_rsvd + headroom, GFP_ATOMIC); | |
2082 | if (!tdata->skb) { | |
00c4a09b TLSC |
2083 | struct cxgbi_sock *csk = cconn->cep->csk; |
2084 | struct net_device *ndev = cdev->ports[csk->port_id]; | |
2085 | ndev->stats.tx_dropped++; | |
9ba682f0 | 2086 | return -ENOMEM; |
2087 | } | |
2088 | ||
2089 | skb_reserve(tdata->skb, cdev->skb_tx_rsvd); | |
2090 | task->hdr = (struct iscsi_hdr *)tdata->skb->data; | |
2091 | task->hdr_max = SKB_TX_ISCSI_PDU_HEADER_MAX; /* BHS + AHS */ | |
2092 | ||
2093 | /* data_out uses scsi_cmd's itt */ | |
2094 | if (opcode != ISCSI_OP_SCSI_DATA_OUT) | |
2095 | task_reserve_itt(task, &task->hdr->itt); | |
2096 | ||
2097 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX, | |
2098 | "task 0x%p, op 0x%x, skb 0x%p,%u+%u/%u, itt 0x%x.\n", | |
2099 | task, opcode, tdata->skb, cdev->skb_tx_rsvd, headroom, | |
2100 | conn->max_xmit_dlength, ntohl(task->hdr->itt)); | |
2101 | ||
2102 | return 0; | |
2103 | } | |
2104 | EXPORT_SYMBOL_GPL(cxgbi_conn_alloc_pdu); | |
2105 | ||
2106 | static inline void tx_skb_setmode(struct sk_buff *skb, int hcrc, int dcrc) | |
2107 | { | |
c343a01c | 2108 | if (hcrc || dcrc) { |
2109 | u8 submode = 0; | |
9ba682f0 | 2110 | |
c343a01c | 2111 | if (hcrc) |
2112 | submode |= 1; | |
2113 | if (dcrc) | |
2114 | submode |= 2; | |
2115 | cxgbi_skcb_ulp_mode(skb) = (ULP2_MODE_ISCSI << 4) | submode; | |
2116 | } else | |
2117 | cxgbi_skcb_ulp_mode(skb) = 0; | |
9ba682f0 | 2118 | } |
2119 | ||
2120 | int cxgbi_conn_init_pdu(struct iscsi_task *task, unsigned int offset, | |
2121 | unsigned int count) | |
2122 | { | |
2123 | struct iscsi_conn *conn = task->conn; | |
e3d2ad8c | 2124 | struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); |
9ba682f0 | 2125 | struct sk_buff *skb = tdata->skb; |
2126 | unsigned int datalen = count; | |
2127 | int i, padlen = iscsi_padding(count); | |
2128 | struct page *pg; | |
2129 | ||
2130 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX, | |
2131 | "task 0x%p,0x%p, skb 0x%p, 0x%x,0x%x,0x%x, %u+%u.\n", | |
2132 | task, task->sc, skb, (*skb->data) & ISCSI_OPCODE_MASK, | |
2133 | ntohl(task->cmdsn), ntohl(task->hdr->itt), offset, count); | |
2134 | ||
2135 | skb_put(skb, task->hdr_len); | |
2136 | tx_skb_setmode(skb, conn->hdrdgst_en, datalen ? conn->datadgst_en : 0); | |
2137 | if (!count) | |
2138 | return 0; | |
2139 | ||
2140 | if (task->sc) { | |
2141 | struct scsi_data_buffer *sdb = scsi_out(task->sc); | |
2142 | struct scatterlist *sg = NULL; | |
2143 | int err; | |
2144 | ||
2145 | tdata->offset = offset; | |
2146 | tdata->count = count; | |
2147 | err = sgl_seek_offset( | |
2148 | sdb->table.sgl, sdb->table.nents, | |
2149 | tdata->offset, &tdata->sgoffset, &sg); | |
2150 | if (err < 0) { | |
2151 | pr_warn("tpdu, sgl %u, bad offset %u/%u.\n", | |
2152 | sdb->table.nents, tdata->offset, sdb->length); | |
2153 | return err; | |
2154 | } | |
2155 | err = sgl_read_to_frags(sg, tdata->sgoffset, tdata->count, | |
2156 | tdata->frags, MAX_PDU_FRAGS); | |
2157 | if (err < 0) { | |
2158 | pr_warn("tpdu, sgl %u, bad offset %u + %u.\n", | |
2159 | sdb->table.nents, tdata->offset, tdata->count); | |
2160 | return err; | |
2161 | } | |
2162 | tdata->nr_frags = err; | |
2163 | ||
2164 | if (tdata->nr_frags > MAX_SKB_FRAGS || | |
2165 | (padlen && tdata->nr_frags == MAX_SKB_FRAGS)) { | |
2166 | char *dst = skb->data + task->hdr_len; | |
6a39a16a | 2167 | struct page_frag *frag = tdata->frags; |
9ba682f0 | 2168 | |
2169 | /* data fits in the skb's headroom */ | |
2170 | for (i = 0; i < tdata->nr_frags; i++, frag++) { | |
77dfce07 | 2171 | char *src = kmap_atomic(frag->page); |
9ba682f0 | 2172 | |
6a39a16a IC |
2173 | memcpy(dst, src+frag->offset, frag->size); |
2174 | dst += frag->size; | |
77dfce07 | 2175 | kunmap_atomic(src); |
9ba682f0 | 2176 | } |
2177 | if (padlen) { | |
2178 | memset(dst, 0, padlen); | |
2179 | padlen = 0; | |
2180 | } | |
2181 | skb_put(skb, count + padlen); | |
2182 | } else { | |
2183 | /* data fit into frag_list */ | |
6a39a16a IC |
2184 | for (i = 0; i < tdata->nr_frags; i++) { |
2185 | __skb_fill_page_desc(skb, i, | |
2186 | tdata->frags[i].page, | |
2187 | tdata->frags[i].offset, | |
2188 | tdata->frags[i].size); | |
2189 | skb_frag_ref(skb, i); | |
2190 | } | |
9ba682f0 | 2191 | skb_shinfo(skb)->nr_frags = tdata->nr_frags; |
2192 | skb->len += count; | |
2193 | skb->data_len += count; | |
2194 | skb->truesize += count; | |
2195 | } | |
2196 | ||
2197 | } else { | |
2198 | pg = virt_to_page(task->data); | |
2199 | ||
2200 | get_page(pg); | |
2201 | skb_fill_page_desc(skb, 0, pg, offset_in_page(task->data), | |
2202 | count); | |
2203 | skb->len += count; | |
2204 | skb->data_len += count; | |
2205 | skb->truesize += count; | |
2206 | } | |
2207 | ||
2208 | if (padlen) { | |
2209 | i = skb_shinfo(skb)->nr_frags; | |
2210 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, | |
2211 | virt_to_page(padding), offset_in_page(padding), | |
2212 | padlen); | |
2213 | ||
2214 | skb->data_len += padlen; | |
2215 | skb->truesize += padlen; | |
2216 | skb->len += padlen; | |
2217 | } | |
2218 | ||
2219 | return 0; | |
2220 | } | |
2221 | EXPORT_SYMBOL_GPL(cxgbi_conn_init_pdu); | |
2222 | ||
2223 | int cxgbi_conn_xmit_pdu(struct iscsi_task *task) | |
2224 | { | |
2225 | struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data; | |
2226 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
e3d2ad8c | 2227 | struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); |
9ba682f0 | 2228 | struct sk_buff *skb = tdata->skb; |
2229 | unsigned int datalen; | |
2230 | int err; | |
2231 | ||
2232 | if (!skb) { | |
2233 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX, | |
2234 | "task 0x%p, skb NULL.\n", task); | |
2235 | return 0; | |
2236 | } | |
2237 | ||
2238 | datalen = skb->data_len; | |
2239 | tdata->skb = NULL; | |
2240 | err = cxgbi_sock_send_pdus(cconn->cep->csk, skb); | |
2241 | if (err > 0) { | |
2242 | int pdulen = err; | |
2243 | ||
2244 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
2245 | "task 0x%p,0x%p, skb 0x%p, len %u/%u, rv %d.\n", | |
2246 | task, task->sc, skb, skb->len, skb->data_len, err); | |
2247 | ||
2248 | if (task->conn->hdrdgst_en) | |
2249 | pdulen += ISCSI_DIGEST_SIZE; | |
2250 | ||
2251 | if (datalen && task->conn->datadgst_en) | |
2252 | pdulen += ISCSI_DIGEST_SIZE; | |
2253 | ||
2254 | task->conn->txdata_octets += pdulen; | |
2255 | return 0; | |
2256 | } | |
2257 | ||
2258 | if (err == -EAGAIN || err == -ENOBUFS) { | |
2259 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
2260 | "task 0x%p, skb 0x%p, len %u/%u, %d EAGAIN.\n", | |
2261 | task, skb, skb->len, skb->data_len, err); | |
2262 | /* reset skb to send when we are called again */ | |
2263 | tdata->skb = skb; | |
2264 | return err; | |
2265 | } | |
2266 | ||
2267 | kfree_skb(skb); | |
2268 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX, | |
2269 | "itt 0x%x, skb 0x%p, len %u/%u, xmit err %d.\n", | |
2270 | task->itt, skb, skb->len, skb->data_len, err); | |
2271 | iscsi_conn_printk(KERN_ERR, task->conn, "xmit err %d.\n", err); | |
2272 | iscsi_conn_failure(task->conn, ISCSI_ERR_XMIT_FAILED); | |
2273 | return err; | |
2274 | } | |
2275 | EXPORT_SYMBOL_GPL(cxgbi_conn_xmit_pdu); | |
2276 | ||
2277 | void cxgbi_cleanup_task(struct iscsi_task *task) | |
2278 | { | |
e3d2ad8c | 2279 | struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); |
9ba682f0 | 2280 | |
2281 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2282 | "task 0x%p, skb 0x%p, itt 0x%x.\n", | |
2283 | task, tdata->skb, task->hdr_itt); | |
2284 | ||
2285 | /* never reached the xmit task callout */ | |
2286 | if (tdata->skb) | |
2287 | __kfree_skb(tdata->skb); | |
2288 | memset(tdata, 0, sizeof(*tdata)); | |
2289 | ||
2290 | task_release_itt(task, task->hdr_itt); | |
2291 | iscsi_tcp_cleanup_task(task); | |
2292 | } | |
2293 | EXPORT_SYMBOL_GPL(cxgbi_cleanup_task); | |
2294 | ||
2295 | void cxgbi_get_conn_stats(struct iscsi_cls_conn *cls_conn, | |
2296 | struct iscsi_stats *stats) | |
2297 | { | |
2298 | struct iscsi_conn *conn = cls_conn->dd_data; | |
2299 | ||
2300 | stats->txdata_octets = conn->txdata_octets; | |
2301 | stats->rxdata_octets = conn->rxdata_octets; | |
2302 | stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; | |
2303 | stats->dataout_pdus = conn->dataout_pdus_cnt; | |
2304 | stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; | |
2305 | stats->datain_pdus = conn->datain_pdus_cnt; | |
2306 | stats->r2t_pdus = conn->r2t_pdus_cnt; | |
2307 | stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; | |
2308 | stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; | |
2309 | stats->digest_err = 0; | |
2310 | stats->timeout_err = 0; | |
2311 | stats->custom_length = 1; | |
2312 | strcpy(stats->custom[0].desc, "eh_abort_cnt"); | |
2313 | stats->custom[0].value = conn->eh_abort_cnt; | |
2314 | } | |
2315 | EXPORT_SYMBOL_GPL(cxgbi_get_conn_stats); | |
2316 | ||
2317 | static int cxgbi_conn_max_xmit_dlength(struct iscsi_conn *conn) | |
2318 | { | |
2319 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
2320 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
2321 | struct cxgbi_device *cdev = cconn->chba->cdev; | |
2322 | unsigned int headroom = SKB_MAX_HEAD(cdev->skb_tx_rsvd); | |
2323 | unsigned int max_def = 512 * MAX_SKB_FRAGS; | |
2324 | unsigned int max = max(max_def, headroom); | |
2325 | ||
2326 | max = min(cconn->chba->cdev->tx_max_size, max); | |
2327 | if (conn->max_xmit_dlength) | |
2328 | conn->max_xmit_dlength = min(conn->max_xmit_dlength, max); | |
2329 | else | |
2330 | conn->max_xmit_dlength = max; | |
2331 | cxgbi_align_pdu_size(conn->max_xmit_dlength); | |
2332 | ||
2333 | return 0; | |
2334 | } | |
2335 | ||
2336 | static int cxgbi_conn_max_recv_dlength(struct iscsi_conn *conn) | |
2337 | { | |
2338 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
2339 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
2340 | unsigned int max = cconn->chba->cdev->rx_max_size; | |
2341 | ||
2342 | cxgbi_align_pdu_size(max); | |
2343 | ||
2344 | if (conn->max_recv_dlength) { | |
2345 | if (conn->max_recv_dlength > max) { | |
2346 | pr_err("MaxRecvDataSegmentLength %u > %u.\n", | |
2347 | conn->max_recv_dlength, max); | |
2348 | return -EINVAL; | |
2349 | } | |
2350 | conn->max_recv_dlength = min(conn->max_recv_dlength, max); | |
2351 | cxgbi_align_pdu_size(conn->max_recv_dlength); | |
2352 | } else | |
2353 | conn->max_recv_dlength = max; | |
2354 | ||
2355 | return 0; | |
2356 | } | |
2357 | ||
2358 | int cxgbi_set_conn_param(struct iscsi_cls_conn *cls_conn, | |
2359 | enum iscsi_param param, char *buf, int buflen) | |
2360 | { | |
2361 | struct iscsi_conn *conn = cls_conn->dd_data; | |
9ba682f0 | 2362 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
2363 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
2364 | struct cxgbi_sock *csk = cconn->cep->csk; | |
1304be5f | 2365 | int err; |
9ba682f0 | 2366 | |
2367 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2368 | "cls_conn 0x%p, param %d, buf(%d) %s.\n", | |
2369 | cls_conn, param, buflen, buf); | |
2370 | ||
2371 | switch (param) { | |
2372 | case ISCSI_PARAM_HDRDGST_EN: | |
2373 | err = iscsi_set_param(cls_conn, param, buf, buflen); | |
2374 | if (!err && conn->hdrdgst_en) | |
2375 | err = csk->cdev->csk_ddp_setup_digest(csk, csk->tid, | |
2376 | conn->hdrdgst_en, | |
2377 | conn->datadgst_en, 0); | |
2378 | break; | |
2379 | case ISCSI_PARAM_DATADGST_EN: | |
2380 | err = iscsi_set_param(cls_conn, param, buf, buflen); | |
2381 | if (!err && conn->datadgst_en) | |
2382 | err = csk->cdev->csk_ddp_setup_digest(csk, csk->tid, | |
2383 | conn->hdrdgst_en, | |
2384 | conn->datadgst_en, 0); | |
2385 | break; | |
2386 | case ISCSI_PARAM_MAX_R2T: | |
1304be5f | 2387 | return iscsi_tcp_set_max_r2t(conn, buf); |
9ba682f0 | 2388 | case ISCSI_PARAM_MAX_RECV_DLENGTH: |
2389 | err = iscsi_set_param(cls_conn, param, buf, buflen); | |
2390 | if (!err) | |
2391 | err = cxgbi_conn_max_recv_dlength(conn); | |
2392 | break; | |
2393 | case ISCSI_PARAM_MAX_XMIT_DLENGTH: | |
2394 | err = iscsi_set_param(cls_conn, param, buf, buflen); | |
2395 | if (!err) | |
2396 | err = cxgbi_conn_max_xmit_dlength(conn); | |
2397 | break; | |
2398 | default: | |
2399 | return iscsi_set_param(cls_conn, param, buf, buflen); | |
2400 | } | |
2401 | return err; | |
2402 | } | |
2403 | EXPORT_SYMBOL_GPL(cxgbi_set_conn_param); | |
2404 | ||
fc8d0590 AB |
2405 | static inline int csk_print_port(struct cxgbi_sock *csk, char *buf) |
2406 | { | |
2407 | int len; | |
2408 | ||
2409 | cxgbi_sock_get(csk); | |
2410 | len = sprintf(buf, "%hu\n", ntohs(csk->daddr.sin_port)); | |
2411 | cxgbi_sock_put(csk); | |
2412 | ||
2413 | return len; | |
2414 | } | |
2415 | ||
2416 | static inline int csk_print_ip(struct cxgbi_sock *csk, char *buf) | |
2417 | { | |
2418 | int len; | |
2419 | ||
2420 | cxgbi_sock_get(csk); | |
2421 | if (csk->csk_family == AF_INET) | |
2422 | len = sprintf(buf, "%pI4", | |
2423 | &csk->daddr.sin_addr.s_addr); | |
2424 | else | |
2425 | len = sprintf(buf, "%pI6", | |
2426 | &csk->daddr6.sin6_addr); | |
2427 | ||
2428 | cxgbi_sock_put(csk); | |
2429 | ||
2430 | return len; | |
2431 | } | |
2432 | ||
c71b9b66 MC |
2433 | int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param param, |
2434 | char *buf) | |
9ba682f0 | 2435 | { |
c71b9b66 MC |
2436 | struct cxgbi_endpoint *cep = ep->dd_data; |
2437 | struct cxgbi_sock *csk; | |
9ba682f0 | 2438 | int len; |
2439 | ||
2440 | log_debug(1 << CXGBI_DBG_ISCSI, | |
c71b9b66 | 2441 | "cls_conn 0x%p, param %d.\n", ep, param); |
9ba682f0 | 2442 | |
2443 | switch (param) { | |
2444 | case ISCSI_PARAM_CONN_PORT: | |
9ba682f0 | 2445 | case ISCSI_PARAM_CONN_ADDRESS: |
c71b9b66 MC |
2446 | if (!cep) |
2447 | return -ENOTCONN; | |
2448 | ||
2449 | csk = cep->csk; | |
2450 | if (!csk) | |
2451 | return -ENOTCONN; | |
2452 | ||
2453 | return iscsi_conn_get_addr_param((struct sockaddr_storage *) | |
2454 | &csk->daddr, param, buf); | |
9ba682f0 | 2455 | default: |
c71b9b66 | 2456 | return -ENOSYS; |
9ba682f0 | 2457 | } |
2458 | return len; | |
2459 | } | |
c71b9b66 | 2460 | EXPORT_SYMBOL_GPL(cxgbi_get_ep_param); |
9ba682f0 | 2461 | |
2462 | struct iscsi_cls_conn * | |
2463 | cxgbi_create_conn(struct iscsi_cls_session *cls_session, u32 cid) | |
2464 | { | |
2465 | struct iscsi_cls_conn *cls_conn; | |
2466 | struct iscsi_conn *conn; | |
2467 | struct iscsi_tcp_conn *tcp_conn; | |
2468 | struct cxgbi_conn *cconn; | |
2469 | ||
2470 | cls_conn = iscsi_tcp_conn_setup(cls_session, sizeof(*cconn), cid); | |
2471 | if (!cls_conn) | |
2472 | return NULL; | |
2473 | ||
2474 | conn = cls_conn->dd_data; | |
2475 | tcp_conn = conn->dd_data; | |
2476 | cconn = tcp_conn->dd_data; | |
2477 | cconn->iconn = conn; | |
2478 | ||
2479 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2480 | "cid %u(0x%x), cls 0x%p,0x%p, conn 0x%p,0x%p,0x%p.\n", | |
2481 | cid, cid, cls_session, cls_conn, conn, tcp_conn, cconn); | |
2482 | ||
2483 | return cls_conn; | |
2484 | } | |
2485 | EXPORT_SYMBOL_GPL(cxgbi_create_conn); | |
2486 | ||
2487 | int cxgbi_bind_conn(struct iscsi_cls_session *cls_session, | |
2488 | struct iscsi_cls_conn *cls_conn, | |
2489 | u64 transport_eph, int is_leading) | |
2490 | { | |
2491 | struct iscsi_conn *conn = cls_conn->dd_data; | |
2492 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
2493 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
2494 | struct iscsi_endpoint *ep; | |
2495 | struct cxgbi_endpoint *cep; | |
2496 | struct cxgbi_sock *csk; | |
2497 | int err; | |
2498 | ||
2499 | ep = iscsi_lookup_endpoint(transport_eph); | |
2500 | if (!ep) | |
2501 | return -EINVAL; | |
2502 | ||
2503 | /* setup ddp pagesize */ | |
2504 | cep = ep->dd_data; | |
2505 | csk = cep->csk; | |
2506 | err = csk->cdev->csk_ddp_setup_pgidx(csk, csk->tid, page_idx, 0); | |
2507 | if (err < 0) | |
2508 | return err; | |
2509 | ||
2510 | err = iscsi_conn_bind(cls_session, cls_conn, is_leading); | |
2511 | if (err) | |
2512 | return -EINVAL; | |
2513 | ||
2514 | /* calculate the tag idx bits needed for this conn based on cmds_max */ | |
2515 | cconn->task_idx_bits = (__ilog2_u32(conn->session->cmds_max - 1)) + 1; | |
2516 | ||
e3d2ad8c | 2517 | write_lock_bh(&csk->callback_lock); |
9ba682f0 | 2518 | csk->user_data = conn; |
2519 | cconn->chba = cep->chba; | |
2520 | cconn->cep = cep; | |
2521 | cep->cconn = cconn; | |
e3d2ad8c | 2522 | write_unlock_bh(&csk->callback_lock); |
9ba682f0 | 2523 | |
2524 | cxgbi_conn_max_xmit_dlength(conn); | |
2525 | cxgbi_conn_max_recv_dlength(conn); | |
2526 | ||
9ba682f0 | 2527 | log_debug(1 << CXGBI_DBG_ISCSI, |
2528 | "cls 0x%p,0x%p, ep 0x%p, cconn 0x%p, csk 0x%p.\n", | |
2529 | cls_session, cls_conn, ep, cconn, csk); | |
2530 | /* init recv engine */ | |
2531 | iscsi_tcp_hdr_recv_prep(tcp_conn); | |
2532 | ||
2533 | return 0; | |
2534 | } | |
2535 | EXPORT_SYMBOL_GPL(cxgbi_bind_conn); | |
2536 | ||
2537 | struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *ep, | |
2538 | u16 cmds_max, u16 qdepth, | |
2539 | u32 initial_cmdsn) | |
2540 | { | |
2541 | struct cxgbi_endpoint *cep; | |
2542 | struct cxgbi_hba *chba; | |
2543 | struct Scsi_Host *shost; | |
2544 | struct iscsi_cls_session *cls_session; | |
2545 | struct iscsi_session *session; | |
2546 | ||
2547 | if (!ep) { | |
2548 | pr_err("missing endpoint.\n"); | |
2549 | return NULL; | |
2550 | } | |
2551 | ||
2552 | cep = ep->dd_data; | |
2553 | chba = cep->chba; | |
2554 | shost = chba->shost; | |
2555 | ||
2556 | BUG_ON(chba != iscsi_host_priv(shost)); | |
2557 | ||
2558 | cls_session = iscsi_session_setup(chba->cdev->itp, shost, | |
2559 | cmds_max, 0, | |
2560 | sizeof(struct iscsi_tcp_task) + | |
2561 | sizeof(struct cxgbi_task_data), | |
2562 | initial_cmdsn, ISCSI_MAX_TARGET); | |
2563 | if (!cls_session) | |
2564 | return NULL; | |
2565 | ||
2566 | session = cls_session->dd_data; | |
2567 | if (iscsi_tcp_r2tpool_alloc(session)) | |
2568 | goto remove_session; | |
2569 | ||
2570 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2571 | "ep 0x%p, cls sess 0x%p.\n", ep, cls_session); | |
2572 | return cls_session; | |
2573 | ||
2574 | remove_session: | |
2575 | iscsi_session_teardown(cls_session); | |
2576 | return NULL; | |
2577 | } | |
2578 | EXPORT_SYMBOL_GPL(cxgbi_create_session); | |
2579 | ||
2580 | void cxgbi_destroy_session(struct iscsi_cls_session *cls_session) | |
2581 | { | |
2582 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2583 | "cls sess 0x%p.\n", cls_session); | |
2584 | ||
2585 | iscsi_tcp_r2tpool_free(cls_session->dd_data); | |
2586 | iscsi_session_teardown(cls_session); | |
2587 | } | |
2588 | EXPORT_SYMBOL_GPL(cxgbi_destroy_session); | |
2589 | ||
2590 | int cxgbi_set_host_param(struct Scsi_Host *shost, enum iscsi_host_param param, | |
2591 | char *buf, int buflen) | |
2592 | { | |
2593 | struct cxgbi_hba *chba = iscsi_host_priv(shost); | |
2594 | ||
2595 | if (!chba->ndev) { | |
2596 | shost_printk(KERN_ERR, shost, "Could not get host param. " | |
2597 | "netdev for host not set.\n"); | |
2598 | return -ENODEV; | |
2599 | } | |
2600 | ||
2601 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2602 | "shost 0x%p, hba 0x%p,%s, param %d, buf(%d) %s.\n", | |
2603 | shost, chba, chba->ndev->name, param, buflen, buf); | |
2604 | ||
2605 | switch (param) { | |
2606 | case ISCSI_HOST_PARAM_IPADDRESS: | |
2607 | { | |
2608 | __be32 addr = in_aton(buf); | |
2609 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2610 | "hba %s, req. ipv4 %pI4.\n", chba->ndev->name, &addr); | |
2611 | cxgbi_set_iscsi_ipv4(chba, addr); | |
2612 | return 0; | |
2613 | } | |
2614 | case ISCSI_HOST_PARAM_HWADDRESS: | |
2615 | case ISCSI_HOST_PARAM_NETDEV_NAME: | |
2616 | return 0; | |
2617 | default: | |
2618 | return iscsi_host_set_param(shost, param, buf, buflen); | |
2619 | } | |
2620 | } | |
2621 | EXPORT_SYMBOL_GPL(cxgbi_set_host_param); | |
2622 | ||
2623 | int cxgbi_get_host_param(struct Scsi_Host *shost, enum iscsi_host_param param, | |
2624 | char *buf) | |
2625 | { | |
2626 | struct cxgbi_hba *chba = iscsi_host_priv(shost); | |
2627 | int len = 0; | |
2628 | ||
2629 | if (!chba->ndev) { | |
2630 | shost_printk(KERN_ERR, shost, "Could not get host param. " | |
2631 | "netdev for host not set.\n"); | |
2632 | return -ENODEV; | |
2633 | } | |
2634 | ||
2635 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2636 | "shost 0x%p, hba 0x%p,%s, param %d.\n", | |
2637 | shost, chba, chba->ndev->name, param); | |
2638 | ||
2639 | switch (param) { | |
2640 | case ISCSI_HOST_PARAM_HWADDRESS: | |
2641 | len = sysfs_format_mac(buf, chba->ndev->dev_addr, 6); | |
2642 | break; | |
2643 | case ISCSI_HOST_PARAM_NETDEV_NAME: | |
2644 | len = sprintf(buf, "%s\n", chba->ndev->name); | |
2645 | break; | |
2646 | case ISCSI_HOST_PARAM_IPADDRESS: | |
2647 | { | |
2648 | __be32 addr; | |
2649 | ||
2650 | addr = cxgbi_get_iscsi_ipv4(chba); | |
2651 | len = sprintf(buf, "%pI4", &addr); | |
2652 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2653 | "hba %s, ipv4 %pI4.\n", chba->ndev->name, &addr); | |
2654 | break; | |
2655 | } | |
2656 | default: | |
2657 | return iscsi_host_get_param(shost, param, buf); | |
2658 | } | |
2659 | ||
2660 | return len; | |
2661 | } | |
2662 | EXPORT_SYMBOL_GPL(cxgbi_get_host_param); | |
2663 | ||
2664 | struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *shost, | |
2665 | struct sockaddr *dst_addr, | |
2666 | int non_blocking) | |
2667 | { | |
2668 | struct iscsi_endpoint *ep; | |
2669 | struct cxgbi_endpoint *cep; | |
2670 | struct cxgbi_hba *hba = NULL; | |
2671 | struct cxgbi_sock *csk; | |
2672 | int err = -EINVAL; | |
2673 | ||
2674 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK, | |
2675 | "shost 0x%p, non_blocking %d, dst_addr 0x%p.\n", | |
2676 | shost, non_blocking, dst_addr); | |
2677 | ||
2678 | if (shost) { | |
2679 | hba = iscsi_host_priv(shost); | |
2680 | if (!hba) { | |
2681 | pr_info("shost 0x%p, priv NULL.\n", shost); | |
2682 | goto err_out; | |
2683 | } | |
2684 | } | |
2685 | ||
fc8d0590 AB |
2686 | if (dst_addr->sa_family == AF_INET) { |
2687 | csk = cxgbi_check_route(dst_addr); | |
e81fbf6c | 2688 | #if IS_ENABLED(CONFIG_IPV6) |
fc8d0590 AB |
2689 | } else if (dst_addr->sa_family == AF_INET6) { |
2690 | csk = cxgbi_check_route6(dst_addr); | |
e81fbf6c | 2691 | #endif |
fc8d0590 AB |
2692 | } else { |
2693 | pr_info("address family 0x%x NOT supported.\n", | |
2694 | dst_addr->sa_family); | |
2695 | err = -EAFNOSUPPORT; | |
2696 | return (struct iscsi_endpoint *)ERR_PTR(err); | |
2697 | } | |
2698 | ||
9ba682f0 | 2699 | if (IS_ERR(csk)) |
2700 | return (struct iscsi_endpoint *)csk; | |
2701 | cxgbi_sock_get(csk); | |
2702 | ||
2703 | if (!hba) | |
2704 | hba = csk->cdev->hbas[csk->port_id]; | |
2705 | else if (hba != csk->cdev->hbas[csk->port_id]) { | |
2706 | pr_info("Could not connect through requested host %u" | |
2707 | "hba 0x%p != 0x%p (%u).\n", | |
2708 | shost->host_no, hba, | |
2709 | csk->cdev->hbas[csk->port_id], csk->port_id); | |
2710 | err = -ENOSPC; | |
2711 | goto release_conn; | |
2712 | } | |
2713 | ||
2714 | err = sock_get_port(csk); | |
2715 | if (err) | |
2716 | goto release_conn; | |
2717 | ||
2718 | cxgbi_sock_set_state(csk, CTP_CONNECTING); | |
2719 | err = csk->cdev->csk_init_act_open(csk); | |
2720 | if (err) | |
2721 | goto release_conn; | |
2722 | ||
2723 | if (cxgbi_sock_is_closing(csk)) { | |
2724 | err = -ENOSPC; | |
2725 | pr_info("csk 0x%p is closing.\n", csk); | |
2726 | goto release_conn; | |
2727 | } | |
2728 | ||
2729 | ep = iscsi_create_endpoint(sizeof(*cep)); | |
2730 | if (!ep) { | |
2731 | err = -ENOMEM; | |
2732 | pr_info("iscsi alloc ep, OOM.\n"); | |
2733 | goto release_conn; | |
2734 | } | |
2735 | ||
2736 | cep = ep->dd_data; | |
2737 | cep->csk = csk; | |
2738 | cep->chba = hba; | |
2739 | ||
2740 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK, | |
2741 | "ep 0x%p, cep 0x%p, csk 0x%p, hba 0x%p,%s.\n", | |
2742 | ep, cep, csk, hba, hba->ndev->name); | |
2743 | return ep; | |
2744 | ||
2745 | release_conn: | |
2746 | cxgbi_sock_put(csk); | |
2747 | cxgbi_sock_closed(csk); | |
2748 | err_out: | |
2749 | return ERR_PTR(err); | |
2750 | } | |
2751 | EXPORT_SYMBOL_GPL(cxgbi_ep_connect); | |
2752 | ||
2753 | int cxgbi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) | |
2754 | { | |
2755 | struct cxgbi_endpoint *cep = ep->dd_data; | |
2756 | struct cxgbi_sock *csk = cep->csk; | |
2757 | ||
2758 | if (!cxgbi_sock_is_established(csk)) | |
2759 | return 0; | |
2760 | return 1; | |
2761 | } | |
2762 | EXPORT_SYMBOL_GPL(cxgbi_ep_poll); | |
2763 | ||
2764 | void cxgbi_ep_disconnect(struct iscsi_endpoint *ep) | |
2765 | { | |
2766 | struct cxgbi_endpoint *cep = ep->dd_data; | |
2767 | struct cxgbi_conn *cconn = cep->cconn; | |
2768 | struct cxgbi_sock *csk = cep->csk; | |
2769 | ||
2770 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK, | |
2771 | "ep 0x%p, cep 0x%p, cconn 0x%p, csk 0x%p,%u,0x%lx.\n", | |
2772 | ep, cep, cconn, csk, csk->state, csk->flags); | |
2773 | ||
2774 | if (cconn && cconn->iconn) { | |
2775 | iscsi_suspend_tx(cconn->iconn); | |
2776 | write_lock_bh(&csk->callback_lock); | |
2777 | cep->csk->user_data = NULL; | |
2778 | cconn->cep = NULL; | |
2779 | write_unlock_bh(&csk->callback_lock); | |
2780 | } | |
2781 | iscsi_destroy_endpoint(ep); | |
2782 | ||
2783 | if (likely(csk->state >= CTP_ESTABLISHED)) | |
2784 | need_active_close(csk); | |
2785 | else | |
2786 | cxgbi_sock_closed(csk); | |
2787 | ||
2788 | cxgbi_sock_put(csk); | |
2789 | } | |
2790 | EXPORT_SYMBOL_GPL(cxgbi_ep_disconnect); | |
2791 | ||
2792 | int cxgbi_iscsi_init(struct iscsi_transport *itp, | |
2793 | struct scsi_transport_template **stt) | |
2794 | { | |
2795 | *stt = iscsi_register_transport(itp); | |
2796 | if (*stt == NULL) { | |
2797 | pr_err("unable to register %s transport 0x%p.\n", | |
2798 | itp->name, itp); | |
2799 | return -ENODEV; | |
2800 | } | |
2801 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2802 | "%s, registered iscsi transport 0x%p.\n", | |
2803 | itp->name, stt); | |
2804 | return 0; | |
2805 | } | |
2806 | EXPORT_SYMBOL_GPL(cxgbi_iscsi_init); | |
2807 | ||
2808 | void cxgbi_iscsi_cleanup(struct iscsi_transport *itp, | |
2809 | struct scsi_transport_template **stt) | |
2810 | { | |
2811 | if (*stt) { | |
2812 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2813 | "de-register transport 0x%p, %s, stt 0x%p.\n", | |
2814 | itp, itp->name, *stt); | |
2815 | *stt = NULL; | |
2816 | iscsi_unregister_transport(itp); | |
2817 | } | |
2818 | } | |
2819 | EXPORT_SYMBOL_GPL(cxgbi_iscsi_cleanup); | |
2820 | ||
587a1f16 | 2821 | umode_t cxgbi_attr_is_visible(int param_type, int param) |
3128c6c7 MC |
2822 | { |
2823 | switch (param_type) { | |
f27fb2ef MC |
2824 | case ISCSI_HOST_PARAM: |
2825 | switch (param) { | |
2826 | case ISCSI_HOST_PARAM_NETDEV_NAME: | |
2827 | case ISCSI_HOST_PARAM_HWADDRESS: | |
2828 | case ISCSI_HOST_PARAM_IPADDRESS: | |
2829 | case ISCSI_HOST_PARAM_INITIATOR_NAME: | |
2830 | return S_IRUGO; | |
2831 | default: | |
2832 | return 0; | |
2833 | } | |
3128c6c7 MC |
2834 | case ISCSI_PARAM: |
2835 | switch (param) { | |
2836 | case ISCSI_PARAM_MAX_RECV_DLENGTH: | |
2837 | case ISCSI_PARAM_MAX_XMIT_DLENGTH: | |
2838 | case ISCSI_PARAM_HDRDGST_EN: | |
2839 | case ISCSI_PARAM_DATADGST_EN: | |
2840 | case ISCSI_PARAM_CONN_ADDRESS: | |
2841 | case ISCSI_PARAM_CONN_PORT: | |
2842 | case ISCSI_PARAM_EXP_STATSN: | |
2843 | case ISCSI_PARAM_PERSISTENT_ADDRESS: | |
2844 | case ISCSI_PARAM_PERSISTENT_PORT: | |
2845 | case ISCSI_PARAM_PING_TMO: | |
2846 | case ISCSI_PARAM_RECV_TMO: | |
1d063c17 MC |
2847 | case ISCSI_PARAM_INITIAL_R2T_EN: |
2848 | case ISCSI_PARAM_MAX_R2T: | |
2849 | case ISCSI_PARAM_IMM_DATA_EN: | |
2850 | case ISCSI_PARAM_FIRST_BURST: | |
2851 | case ISCSI_PARAM_MAX_BURST: | |
2852 | case ISCSI_PARAM_PDU_INORDER_EN: | |
2853 | case ISCSI_PARAM_DATASEQ_INORDER_EN: | |
2854 | case ISCSI_PARAM_ERL: | |
2855 | case ISCSI_PARAM_TARGET_NAME: | |
2856 | case ISCSI_PARAM_TPGT: | |
2857 | case ISCSI_PARAM_USERNAME: | |
2858 | case ISCSI_PARAM_PASSWORD: | |
2859 | case ISCSI_PARAM_USERNAME_IN: | |
2860 | case ISCSI_PARAM_PASSWORD_IN: | |
2861 | case ISCSI_PARAM_FAST_ABORT: | |
2862 | case ISCSI_PARAM_ABORT_TMO: | |
2863 | case ISCSI_PARAM_LU_RESET_TMO: | |
2864 | case ISCSI_PARAM_TGT_RESET_TMO: | |
2865 | case ISCSI_PARAM_IFACE_NAME: | |
2866 | case ISCSI_PARAM_INITIATOR_NAME: | |
3128c6c7 MC |
2867 | return S_IRUGO; |
2868 | default: | |
2869 | return 0; | |
2870 | } | |
2871 | } | |
2872 | ||
2873 | return 0; | |
2874 | } | |
2875 | EXPORT_SYMBOL_GPL(cxgbi_attr_is_visible); | |
2876 | ||
9ba682f0 | 2877 | static int __init libcxgbi_init_module(void) |
2878 | { | |
2879 | sw_tag_idx_bits = (__ilog2_u32(ISCSI_ITT_MASK)) + 1; | |
2880 | sw_tag_age_bits = (__ilog2_u32(ISCSI_AGE_MASK)) + 1; | |
2881 | ||
2882 | pr_info("tag itt 0x%x, %u bits, age 0x%x, %u bits.\n", | |
2883 | ISCSI_ITT_MASK, sw_tag_idx_bits, | |
2884 | ISCSI_AGE_MASK, sw_tag_age_bits); | |
2885 | ||
2886 | ddp_setup_host_page_size(); | |
2887 | return 0; | |
2888 | } | |
2889 | ||
2890 | static void __exit libcxgbi_exit_module(void) | |
2891 | { | |
2892 | cxgbi_device_unregister_all(0xFF); | |
2893 | return; | |
2894 | } | |
2895 | ||
2896 | module_init(libcxgbi_init_module); | |
2897 | module_exit(libcxgbi_exit_module); |