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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> | |
27 | #include <linux/inetdevice.h> /* ip_dev_find */ | |
acf3368f | 28 | #include <linux/module.h> |
9ba682f0 | 29 | #include <net/tcp.h> |
30 | ||
31 | static unsigned int dbg_level; | |
32 | ||
33 | #include "libcxgbi.h" | |
34 | ||
35 | #define DRV_MODULE_NAME "libcxgbi" | |
36 | #define DRV_MODULE_DESC "Chelsio iSCSI driver library" | |
37 | #define DRV_MODULE_VERSION "0.9.0" | |
38 | #define DRV_MODULE_RELDATE "Jun. 2010" | |
39 | ||
40 | MODULE_AUTHOR("Chelsio Communications, Inc."); | |
41 | MODULE_DESCRIPTION(DRV_MODULE_DESC); | |
42 | MODULE_VERSION(DRV_MODULE_VERSION); | |
43 | MODULE_LICENSE("GPL"); | |
44 | ||
45 | module_param(dbg_level, uint, 0644); | |
46 | MODULE_PARM_DESC(dbg_level, "libiscsi debug level (default=0)"); | |
47 | ||
48 | ||
49 | /* | |
50 | * cxgbi device management | |
51 | * maintains a list of the cxgbi devices | |
52 | */ | |
53 | static LIST_HEAD(cdev_list); | |
54 | static DEFINE_MUTEX(cdev_mutex); | |
55 | ||
56 | int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base, | |
57 | unsigned int max_conn) | |
58 | { | |
59 | struct cxgbi_ports_map *pmap = &cdev->pmap; | |
60 | ||
61 | pmap->port_csk = cxgbi_alloc_big_mem(max_conn * | |
62 | sizeof(struct cxgbi_sock *), | |
63 | GFP_KERNEL); | |
64 | if (!pmap->port_csk) { | |
65 | pr_warn("cdev 0x%p, portmap OOM %u.\n", cdev, max_conn); | |
66 | return -ENOMEM; | |
67 | } | |
68 | ||
69 | pmap->max_connect = max_conn; | |
70 | pmap->sport_base = base; | |
71 | spin_lock_init(&pmap->lock); | |
72 | return 0; | |
73 | } | |
74 | EXPORT_SYMBOL_GPL(cxgbi_device_portmap_create); | |
75 | ||
76 | void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev) | |
77 | { | |
78 | struct cxgbi_ports_map *pmap = &cdev->pmap; | |
79 | struct cxgbi_sock *csk; | |
80 | int i; | |
81 | ||
82 | for (i = 0; i < pmap->max_connect; i++) { | |
83 | if (pmap->port_csk[i]) { | |
84 | csk = pmap->port_csk[i]; | |
85 | pmap->port_csk[i] = NULL; | |
86 | log_debug(1 << CXGBI_DBG_SOCK, | |
87 | "csk 0x%p, cdev 0x%p, offload down.\n", | |
88 | csk, cdev); | |
89 | spin_lock_bh(&csk->lock); | |
90 | cxgbi_sock_set_flag(csk, CTPF_OFFLOAD_DOWN); | |
91 | cxgbi_sock_closed(csk); | |
92 | spin_unlock_bh(&csk->lock); | |
93 | cxgbi_sock_put(csk); | |
94 | } | |
95 | } | |
96 | } | |
97 | EXPORT_SYMBOL_GPL(cxgbi_device_portmap_cleanup); | |
98 | ||
99 | static inline void cxgbi_device_destroy(struct cxgbi_device *cdev) | |
100 | { | |
101 | log_debug(1 << CXGBI_DBG_DEV, | |
102 | "cdev 0x%p, p# %u.\n", cdev, cdev->nports); | |
103 | cxgbi_hbas_remove(cdev); | |
104 | cxgbi_device_portmap_cleanup(cdev); | |
105 | if (cdev->dev_ddp_cleanup) | |
106 | cdev->dev_ddp_cleanup(cdev); | |
107 | else | |
108 | cxgbi_ddp_cleanup(cdev); | |
109 | if (cdev->ddp) | |
110 | cxgbi_ddp_cleanup(cdev); | |
111 | if (cdev->pmap.max_connect) | |
112 | cxgbi_free_big_mem(cdev->pmap.port_csk); | |
113 | kfree(cdev); | |
114 | } | |
115 | ||
116 | struct cxgbi_device *cxgbi_device_register(unsigned int extra, | |
117 | unsigned int nports) | |
118 | { | |
119 | struct cxgbi_device *cdev; | |
120 | ||
121 | cdev = kzalloc(sizeof(*cdev) + extra + nports * | |
122 | (sizeof(struct cxgbi_hba *) + | |
123 | sizeof(struct net_device *)), | |
124 | GFP_KERNEL); | |
125 | if (!cdev) { | |
126 | pr_warn("nport %d, OOM.\n", nports); | |
127 | return NULL; | |
128 | } | |
129 | cdev->ports = (struct net_device **)(cdev + 1); | |
130 | cdev->hbas = (struct cxgbi_hba **)(((char*)cdev->ports) + nports * | |
131 | sizeof(struct net_device *)); | |
132 | if (extra) | |
133 | cdev->dd_data = ((char *)cdev->hbas) + | |
134 | nports * sizeof(struct cxgbi_hba *); | |
135 | spin_lock_init(&cdev->pmap.lock); | |
136 | ||
137 | mutex_lock(&cdev_mutex); | |
138 | list_add_tail(&cdev->list_head, &cdev_list); | |
139 | mutex_unlock(&cdev_mutex); | |
140 | ||
141 | log_debug(1 << CXGBI_DBG_DEV, | |
142 | "cdev 0x%p, p# %u.\n", cdev, nports); | |
143 | return cdev; | |
144 | } | |
145 | EXPORT_SYMBOL_GPL(cxgbi_device_register); | |
146 | ||
147 | void cxgbi_device_unregister(struct cxgbi_device *cdev) | |
148 | { | |
149 | log_debug(1 << CXGBI_DBG_DEV, | |
150 | "cdev 0x%p, p# %u,%s.\n", | |
151 | cdev, cdev->nports, cdev->nports ? cdev->ports[0]->name : ""); | |
152 | mutex_lock(&cdev_mutex); | |
153 | list_del(&cdev->list_head); | |
154 | mutex_unlock(&cdev_mutex); | |
155 | cxgbi_device_destroy(cdev); | |
156 | } | |
157 | EXPORT_SYMBOL_GPL(cxgbi_device_unregister); | |
158 | ||
159 | void cxgbi_device_unregister_all(unsigned int flag) | |
160 | { | |
161 | struct cxgbi_device *cdev, *tmp; | |
162 | ||
163 | mutex_lock(&cdev_mutex); | |
164 | list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) { | |
165 | if ((cdev->flags & flag) == flag) { | |
166 | log_debug(1 << CXGBI_DBG_DEV, | |
167 | "cdev 0x%p, p# %u,%s.\n", | |
168 | cdev, cdev->nports, cdev->nports ? | |
169 | cdev->ports[0]->name : ""); | |
170 | list_del(&cdev->list_head); | |
171 | cxgbi_device_destroy(cdev); | |
172 | } | |
173 | } | |
174 | mutex_unlock(&cdev_mutex); | |
175 | } | |
176 | EXPORT_SYMBOL_GPL(cxgbi_device_unregister_all); | |
177 | ||
178 | struct cxgbi_device *cxgbi_device_find_by_lldev(void *lldev) | |
179 | { | |
180 | struct cxgbi_device *cdev, *tmp; | |
181 | ||
182 | mutex_lock(&cdev_mutex); | |
183 | list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) { | |
184 | if (cdev->lldev == lldev) { | |
185 | mutex_unlock(&cdev_mutex); | |
186 | return cdev; | |
187 | } | |
188 | } | |
189 | mutex_unlock(&cdev_mutex); | |
190 | log_debug(1 << CXGBI_DBG_DEV, | |
191 | "lldev 0x%p, NO match found.\n", lldev); | |
192 | return NULL; | |
193 | } | |
194 | EXPORT_SYMBOL_GPL(cxgbi_device_find_by_lldev); | |
195 | ||
196 | static struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev, | |
197 | int *port) | |
198 | { | |
0b3d8947 | 199 | struct net_device *vdev = NULL; |
9ba682f0 | 200 | struct cxgbi_device *cdev, *tmp; |
201 | int i; | |
202 | ||
0b3d8947 | 203 | if (ndev->priv_flags & IFF_802_1Q_VLAN) { |
204 | vdev = ndev; | |
9ba682f0 | 205 | ndev = vlan_dev_real_dev(ndev); |
0b3d8947 | 206 | log_debug(1 << CXGBI_DBG_DEV, |
207 | "vlan dev %s -> %s.\n", vdev->name, ndev->name); | |
208 | } | |
9ba682f0 | 209 | |
210 | mutex_lock(&cdev_mutex); | |
211 | list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) { | |
212 | for (i = 0; i < cdev->nports; i++) { | |
213 | if (ndev == cdev->ports[i]) { | |
0b3d8947 | 214 | cdev->hbas[i]->vdev = vdev; |
9ba682f0 | 215 | mutex_unlock(&cdev_mutex); |
216 | if (port) | |
217 | *port = i; | |
218 | return cdev; | |
219 | } | |
220 | } | |
221 | } | |
222 | mutex_unlock(&cdev_mutex); | |
223 | log_debug(1 << CXGBI_DBG_DEV, | |
224 | "ndev 0x%p, %s, NO match found.\n", ndev, ndev->name); | |
225 | return NULL; | |
226 | } | |
227 | ||
9ba682f0 | 228 | void cxgbi_hbas_remove(struct cxgbi_device *cdev) |
229 | { | |
230 | int i; | |
231 | struct cxgbi_hba *chba; | |
232 | ||
233 | log_debug(1 << CXGBI_DBG_DEV, | |
234 | "cdev 0x%p, p#%u.\n", cdev, cdev->nports); | |
235 | ||
236 | for (i = 0; i < cdev->nports; i++) { | |
237 | chba = cdev->hbas[i]; | |
238 | if (chba) { | |
239 | cdev->hbas[i] = NULL; | |
240 | iscsi_host_remove(chba->shost); | |
241 | pci_dev_put(cdev->pdev); | |
242 | iscsi_host_free(chba->shost); | |
243 | } | |
244 | } | |
245 | } | |
246 | EXPORT_SYMBOL_GPL(cxgbi_hbas_remove); | |
247 | ||
248 | int cxgbi_hbas_add(struct cxgbi_device *cdev, unsigned int max_lun, | |
249 | unsigned int max_id, struct scsi_host_template *sht, | |
250 | struct scsi_transport_template *stt) | |
251 | { | |
252 | struct cxgbi_hba *chba; | |
253 | struct Scsi_Host *shost; | |
254 | int i, err; | |
255 | ||
256 | log_debug(1 << CXGBI_DBG_DEV, "cdev 0x%p, p#%u.\n", cdev, cdev->nports); | |
257 | ||
258 | for (i = 0; i < cdev->nports; i++) { | |
259 | shost = iscsi_host_alloc(sht, sizeof(*chba), 1); | |
260 | if (!shost) { | |
261 | pr_info("0x%p, p%d, %s, host alloc failed.\n", | |
262 | cdev, i, cdev->ports[i]->name); | |
263 | err = -ENOMEM; | |
264 | goto err_out; | |
265 | } | |
266 | ||
267 | shost->transportt = stt; | |
268 | shost->max_lun = max_lun; | |
269 | shost->max_id = max_id; | |
270 | shost->max_channel = 0; | |
271 | shost->max_cmd_len = 16; | |
272 | ||
273 | chba = iscsi_host_priv(shost); | |
274 | chba->cdev = cdev; | |
275 | chba->ndev = cdev->ports[i]; | |
276 | chba->shost = shost; | |
277 | ||
278 | log_debug(1 << CXGBI_DBG_DEV, | |
279 | "cdev 0x%p, p#%d %s: chba 0x%p.\n", | |
280 | cdev, i, cdev->ports[i]->name, chba); | |
281 | ||
282 | pci_dev_get(cdev->pdev); | |
283 | err = iscsi_host_add(shost, &cdev->pdev->dev); | |
284 | if (err) { | |
285 | pr_info("cdev 0x%p, p#%d %s, host add failed.\n", | |
286 | cdev, i, cdev->ports[i]->name); | |
287 | pci_dev_put(cdev->pdev); | |
288 | scsi_host_put(shost); | |
289 | goto err_out; | |
290 | } | |
291 | ||
292 | cdev->hbas[i] = chba; | |
293 | } | |
294 | ||
295 | return 0; | |
296 | ||
297 | err_out: | |
298 | cxgbi_hbas_remove(cdev); | |
299 | return err; | |
300 | } | |
301 | EXPORT_SYMBOL_GPL(cxgbi_hbas_add); | |
302 | ||
303 | /* | |
304 | * iSCSI offload | |
305 | * | |
306 | * - source port management | |
307 | * To find a free source port in the port allocation map we use a very simple | |
308 | * rotor scheme to look for the next free port. | |
309 | * | |
310 | * If a source port has been specified make sure that it doesn't collide with | |
311 | * our normal source port allocation map. If it's outside the range of our | |
312 | * allocation/deallocation scheme just let them use it. | |
313 | * | |
314 | * If the source port is outside our allocation range, the caller is | |
315 | * responsible for keeping track of their port usage. | |
316 | */ | |
317 | static int sock_get_port(struct cxgbi_sock *csk) | |
318 | { | |
319 | struct cxgbi_device *cdev = csk->cdev; | |
320 | struct cxgbi_ports_map *pmap = &cdev->pmap; | |
321 | unsigned int start; | |
322 | int idx; | |
323 | ||
324 | if (!pmap->max_connect) { | |
325 | pr_err("cdev 0x%p, p#%u %s, NO port map.\n", | |
326 | cdev, csk->port_id, cdev->ports[csk->port_id]->name); | |
327 | return -EADDRNOTAVAIL; | |
328 | } | |
329 | ||
330 | if (csk->saddr.sin_port) { | |
331 | pr_err("source port NON-ZERO %u.\n", | |
332 | ntohs(csk->saddr.sin_port)); | |
333 | return -EADDRINUSE; | |
334 | } | |
335 | ||
336 | spin_lock_bh(&pmap->lock); | |
337 | if (pmap->used >= pmap->max_connect) { | |
338 | spin_unlock_bh(&pmap->lock); | |
339 | pr_info("cdev 0x%p, p#%u %s, ALL ports used.\n", | |
340 | cdev, csk->port_id, cdev->ports[csk->port_id]->name); | |
341 | return -EADDRNOTAVAIL; | |
342 | } | |
343 | ||
344 | start = idx = pmap->next; | |
345 | do { | |
346 | if (++idx >= pmap->max_connect) | |
347 | idx = 0; | |
348 | if (!pmap->port_csk[idx]) { | |
349 | pmap->used++; | |
350 | csk->saddr.sin_port = | |
351 | htons(pmap->sport_base + idx); | |
352 | pmap->next = idx; | |
353 | pmap->port_csk[idx] = csk; | |
354 | spin_unlock_bh(&pmap->lock); | |
355 | cxgbi_sock_get(csk); | |
356 | log_debug(1 << CXGBI_DBG_SOCK, | |
357 | "cdev 0x%p, p#%u %s, p %u, %u.\n", | |
358 | cdev, csk->port_id, | |
359 | cdev->ports[csk->port_id]->name, | |
360 | pmap->sport_base + idx, pmap->next); | |
361 | return 0; | |
362 | } | |
363 | } while (idx != start); | |
364 | spin_unlock_bh(&pmap->lock); | |
365 | ||
366 | /* should not happen */ | |
367 | pr_warn("cdev 0x%p, p#%u %s, next %u?\n", | |
368 | cdev, csk->port_id, cdev->ports[csk->port_id]->name, | |
369 | pmap->next); | |
370 | return -EADDRNOTAVAIL; | |
371 | } | |
372 | ||
373 | static void sock_put_port(struct cxgbi_sock *csk) | |
374 | { | |
375 | struct cxgbi_device *cdev = csk->cdev; | |
376 | struct cxgbi_ports_map *pmap = &cdev->pmap; | |
377 | ||
378 | if (csk->saddr.sin_port) { | |
379 | int idx = ntohs(csk->saddr.sin_port) - pmap->sport_base; | |
380 | ||
381 | csk->saddr.sin_port = 0; | |
382 | if (idx < 0 || idx >= pmap->max_connect) { | |
383 | pr_err("cdev 0x%p, p#%u %s, port %u OOR.\n", | |
384 | cdev, csk->port_id, | |
385 | cdev->ports[csk->port_id]->name, | |
386 | ntohs(csk->saddr.sin_port)); | |
387 | return; | |
388 | } | |
389 | ||
390 | spin_lock_bh(&pmap->lock); | |
391 | pmap->port_csk[idx] = NULL; | |
392 | pmap->used--; | |
393 | spin_unlock_bh(&pmap->lock); | |
394 | ||
395 | log_debug(1 << CXGBI_DBG_SOCK, | |
396 | "cdev 0x%p, p#%u %s, release %u.\n", | |
397 | cdev, csk->port_id, cdev->ports[csk->port_id]->name, | |
398 | pmap->sport_base + idx); | |
399 | ||
400 | cxgbi_sock_put(csk); | |
401 | } | |
402 | } | |
403 | ||
404 | /* | |
405 | * iscsi tcp connection | |
406 | */ | |
407 | void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *csk) | |
408 | { | |
409 | if (csk->cpl_close) { | |
410 | kfree_skb(csk->cpl_close); | |
411 | csk->cpl_close = NULL; | |
412 | } | |
413 | if (csk->cpl_abort_req) { | |
414 | kfree_skb(csk->cpl_abort_req); | |
415 | csk->cpl_abort_req = NULL; | |
416 | } | |
417 | if (csk->cpl_abort_rpl) { | |
418 | kfree_skb(csk->cpl_abort_rpl); | |
419 | csk->cpl_abort_rpl = NULL; | |
420 | } | |
421 | } | |
422 | EXPORT_SYMBOL_GPL(cxgbi_sock_free_cpl_skbs); | |
423 | ||
424 | static struct cxgbi_sock *cxgbi_sock_create(struct cxgbi_device *cdev) | |
425 | { | |
426 | struct cxgbi_sock *csk = kzalloc(sizeof(*csk), GFP_NOIO); | |
427 | ||
428 | if (!csk) { | |
429 | pr_info("alloc csk %zu failed.\n", sizeof(*csk)); | |
430 | return NULL; | |
431 | } | |
432 | ||
433 | if (cdev->csk_alloc_cpls(csk) < 0) { | |
434 | pr_info("csk 0x%p, alloc cpls failed.\n", csk); | |
435 | kfree(csk); | |
436 | return NULL; | |
437 | } | |
438 | ||
439 | spin_lock_init(&csk->lock); | |
440 | kref_init(&csk->refcnt); | |
441 | skb_queue_head_init(&csk->receive_queue); | |
442 | skb_queue_head_init(&csk->write_queue); | |
443 | setup_timer(&csk->retry_timer, NULL, (unsigned long)csk); | |
444 | rwlock_init(&csk->callback_lock); | |
445 | csk->cdev = cdev; | |
446 | csk->flags = 0; | |
447 | cxgbi_sock_set_state(csk, CTP_CLOSED); | |
448 | ||
449 | log_debug(1 << CXGBI_DBG_SOCK, "cdev 0x%p, new csk 0x%p.\n", cdev, csk); | |
450 | ||
451 | return csk; | |
452 | } | |
453 | ||
f4bfd99f DM |
454 | static struct rtable *find_route_ipv4(struct flowi4 *fl4, |
455 | __be32 saddr, __be32 daddr, | |
78fbfd8a | 456 | __be16 sport, __be16 dport, u8 tos) |
9ba682f0 | 457 | { |
458 | struct rtable *rt; | |
9ba682f0 | 459 | |
f4bfd99f | 460 | rt = ip_route_output_ports(&init_net, fl4, NULL, daddr, saddr, |
78fbfd8a | 461 | dport, sport, IPPROTO_TCP, tos, 0); |
b23dd4fe | 462 | if (IS_ERR(rt)) |
9ba682f0 | 463 | return NULL; |
464 | ||
465 | return rt; | |
466 | } | |
467 | ||
468 | static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr) | |
469 | { | |
470 | struct sockaddr_in *daddr = (struct sockaddr_in *)dst_addr; | |
471 | struct dst_entry *dst; | |
472 | struct net_device *ndev; | |
473 | struct cxgbi_device *cdev; | |
474 | struct rtable *rt = NULL; | |
a58b61e5 | 475 | struct neighbour *n; |
f4bfd99f | 476 | struct flowi4 fl4; |
9ba682f0 | 477 | struct cxgbi_sock *csk = NULL; |
478 | unsigned int mtu = 0; | |
479 | int port = 0xFFFF; | |
480 | int err = 0; | |
481 | ||
482 | if (daddr->sin_family != AF_INET) { | |
483 | pr_info("address family 0x%x NOT supported.\n", | |
484 | daddr->sin_family); | |
485 | err = -EAFNOSUPPORT; | |
486 | goto err_out; | |
487 | } | |
488 | ||
f4bfd99f | 489 | rt = find_route_ipv4(&fl4, 0, daddr->sin_addr.s_addr, 0, daddr->sin_port, 0); |
9ba682f0 | 490 | if (!rt) { |
491 | pr_info("no route to ipv4 0x%x, port %u.\n", | |
492 | daddr->sin_addr.s_addr, daddr->sin_port); | |
493 | err = -ENETUNREACH; | |
494 | goto err_out; | |
495 | } | |
496 | dst = &rt->dst; | |
a58b61e5 DM |
497 | n = dst_get_neighbour_noref(dst); |
498 | if (!n) { | |
499 | err = -ENODEV; | |
500 | goto rel_rt; | |
501 | } | |
502 | ndev = n->dev; | |
9ba682f0 | 503 | |
504 | if (rt->rt_flags & (RTCF_MULTICAST | RTCF_BROADCAST)) { | |
505 | pr_info("multi-cast route %pI4, port %u, dev %s.\n", | |
506 | &daddr->sin_addr.s_addr, ntohs(daddr->sin_port), | |
507 | ndev->name); | |
508 | err = -ENETUNREACH; | |
509 | goto rel_rt; | |
510 | } | |
511 | ||
512 | if (ndev->flags & IFF_LOOPBACK) { | |
513 | ndev = ip_dev_find(&init_net, daddr->sin_addr.s_addr); | |
514 | mtu = ndev->mtu; | |
515 | pr_info("rt dev %s, loopback -> %s, mtu %u.\n", | |
a58b61e5 | 516 | n->dev->name, ndev->name, mtu); |
9ba682f0 | 517 | } |
518 | ||
9ba682f0 | 519 | cdev = cxgbi_device_find_by_netdev(ndev, &port); |
520 | if (!cdev) { | |
521 | pr_info("dst %pI4, %s, NOT cxgbi device.\n", | |
522 | &daddr->sin_addr.s_addr, ndev->name); | |
523 | err = -ENETUNREACH; | |
524 | goto rel_rt; | |
525 | } | |
526 | log_debug(1 << CXGBI_DBG_SOCK, | |
527 | "route to %pI4 :%u, ndev p#%d,%s, cdev 0x%p.\n", | |
528 | &daddr->sin_addr.s_addr, ntohs(daddr->sin_port), | |
529 | port, ndev->name, cdev); | |
530 | ||
531 | csk = cxgbi_sock_create(cdev); | |
532 | if (!csk) { | |
533 | err = -ENOMEM; | |
534 | goto rel_rt; | |
535 | } | |
536 | csk->cdev = cdev; | |
537 | csk->port_id = port; | |
538 | csk->mtu = mtu; | |
539 | csk->dst = dst; | |
540 | csk->daddr.sin_addr.s_addr = daddr->sin_addr.s_addr; | |
541 | csk->daddr.sin_port = daddr->sin_port; | |
c71b9b66 | 542 | csk->daddr.sin_family = daddr->sin_family; |
f4bfd99f | 543 | csk->saddr.sin_addr.s_addr = fl4.saddr; |
9ba682f0 | 544 | |
545 | return csk; | |
546 | ||
547 | rel_rt: | |
548 | ip_rt_put(rt); | |
549 | if (csk) | |
550 | cxgbi_sock_closed(csk); | |
551 | err_out: | |
552 | return ERR_PTR(err); | |
553 | } | |
554 | ||
555 | void cxgbi_sock_established(struct cxgbi_sock *csk, unsigned int snd_isn, | |
556 | unsigned int opt) | |
557 | { | |
558 | csk->write_seq = csk->snd_nxt = csk->snd_una = snd_isn; | |
559 | dst_confirm(csk->dst); | |
560 | smp_mb(); | |
561 | cxgbi_sock_set_state(csk, CTP_ESTABLISHED); | |
562 | } | |
563 | EXPORT_SYMBOL_GPL(cxgbi_sock_established); | |
564 | ||
565 | static void cxgbi_inform_iscsi_conn_closing(struct cxgbi_sock *csk) | |
566 | { | |
567 | log_debug(1 << CXGBI_DBG_SOCK, | |
568 | "csk 0x%p, state %u, flags 0x%lx, conn 0x%p.\n", | |
569 | csk, csk->state, csk->flags, csk->user_data); | |
570 | ||
571 | if (csk->state != CTP_ESTABLISHED) { | |
e3d2ad8c | 572 | read_lock_bh(&csk->callback_lock); |
9ba682f0 | 573 | if (csk->user_data) |
574 | iscsi_conn_failure(csk->user_data, | |
575 | ISCSI_ERR_CONN_FAILED); | |
e3d2ad8c | 576 | read_unlock_bh(&csk->callback_lock); |
9ba682f0 | 577 | } |
578 | } | |
579 | ||
580 | void cxgbi_sock_closed(struct cxgbi_sock *csk) | |
581 | { | |
582 | log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", | |
583 | csk, (csk)->state, (csk)->flags, (csk)->tid); | |
584 | cxgbi_sock_set_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED); | |
585 | if (csk->state == CTP_ACTIVE_OPEN || csk->state == CTP_CLOSED) | |
586 | return; | |
587 | if (csk->saddr.sin_port) | |
588 | sock_put_port(csk); | |
589 | if (csk->dst) | |
590 | dst_release(csk->dst); | |
591 | csk->cdev->csk_release_offload_resources(csk); | |
592 | cxgbi_sock_set_state(csk, CTP_CLOSED); | |
593 | cxgbi_inform_iscsi_conn_closing(csk); | |
594 | cxgbi_sock_put(csk); | |
595 | } | |
596 | EXPORT_SYMBOL_GPL(cxgbi_sock_closed); | |
597 | ||
598 | static void need_active_close(struct cxgbi_sock *csk) | |
599 | { | |
600 | int data_lost; | |
601 | int close_req = 0; | |
602 | ||
603 | log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", | |
604 | csk, (csk)->state, (csk)->flags, (csk)->tid); | |
605 | spin_lock_bh(&csk->lock); | |
606 | dst_confirm(csk->dst); | |
607 | data_lost = skb_queue_len(&csk->receive_queue); | |
608 | __skb_queue_purge(&csk->receive_queue); | |
609 | ||
610 | if (csk->state == CTP_ACTIVE_OPEN) | |
611 | cxgbi_sock_set_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED); | |
612 | else if (csk->state == CTP_ESTABLISHED) { | |
613 | close_req = 1; | |
614 | cxgbi_sock_set_state(csk, CTP_ACTIVE_CLOSE); | |
615 | } else if (csk->state == CTP_PASSIVE_CLOSE) { | |
616 | close_req = 1; | |
617 | cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_2); | |
618 | } | |
619 | ||
620 | if (close_req) { | |
621 | if (data_lost) | |
622 | csk->cdev->csk_send_abort_req(csk); | |
623 | else | |
624 | csk->cdev->csk_send_close_req(csk); | |
625 | } | |
626 | ||
627 | spin_unlock_bh(&csk->lock); | |
628 | } | |
629 | ||
630 | void cxgbi_sock_fail_act_open(struct cxgbi_sock *csk, int errno) | |
631 | { | |
632 | pr_info("csk 0x%p,%u,%lx, %pI4:%u-%pI4:%u, err %d.\n", | |
633 | csk, csk->state, csk->flags, | |
634 | &csk->saddr.sin_addr.s_addr, csk->saddr.sin_port, | |
635 | &csk->daddr.sin_addr.s_addr, csk->daddr.sin_port, | |
636 | errno); | |
637 | ||
638 | cxgbi_sock_set_state(csk, CTP_CONNECTING); | |
639 | csk->err = errno; | |
640 | cxgbi_sock_closed(csk); | |
641 | } | |
642 | EXPORT_SYMBOL_GPL(cxgbi_sock_fail_act_open); | |
643 | ||
644 | void cxgbi_sock_act_open_req_arp_failure(void *handle, struct sk_buff *skb) | |
645 | { | |
646 | struct cxgbi_sock *csk = (struct cxgbi_sock *)skb->sk; | |
647 | ||
648 | log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", | |
649 | csk, (csk)->state, (csk)->flags, (csk)->tid); | |
650 | cxgbi_sock_get(csk); | |
651 | spin_lock_bh(&csk->lock); | |
652 | if (csk->state == CTP_ACTIVE_OPEN) | |
653 | cxgbi_sock_fail_act_open(csk, -EHOSTUNREACH); | |
654 | spin_unlock_bh(&csk->lock); | |
655 | cxgbi_sock_put(csk); | |
656 | __kfree_skb(skb); | |
657 | } | |
658 | EXPORT_SYMBOL_GPL(cxgbi_sock_act_open_req_arp_failure); | |
659 | ||
660 | void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *csk) | |
661 | { | |
662 | cxgbi_sock_get(csk); | |
663 | spin_lock_bh(&csk->lock); | |
664 | if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { | |
665 | if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_RCVD)) | |
666 | cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_RCVD); | |
667 | else { | |
668 | cxgbi_sock_clear_flag(csk, CTPF_ABORT_RPL_RCVD); | |
669 | cxgbi_sock_clear_flag(csk, CTPF_ABORT_RPL_PENDING); | |
670 | if (cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) | |
671 | pr_err("csk 0x%p,%u,0x%lx,%u,ABT_RPL_RSS.\n", | |
672 | csk, csk->state, csk->flags, csk->tid); | |
673 | cxgbi_sock_closed(csk); | |
674 | } | |
675 | } | |
676 | spin_unlock_bh(&csk->lock); | |
677 | cxgbi_sock_put(csk); | |
678 | } | |
679 | EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_abort_rpl); | |
680 | ||
681 | void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *csk) | |
682 | { | |
683 | log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", | |
684 | csk, (csk)->state, (csk)->flags, (csk)->tid); | |
685 | cxgbi_sock_get(csk); | |
686 | spin_lock_bh(&csk->lock); | |
687 | ||
688 | if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) | |
689 | goto done; | |
690 | ||
691 | switch (csk->state) { | |
692 | case CTP_ESTABLISHED: | |
693 | cxgbi_sock_set_state(csk, CTP_PASSIVE_CLOSE); | |
694 | break; | |
695 | case CTP_ACTIVE_CLOSE: | |
696 | cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_2); | |
697 | break; | |
698 | case CTP_CLOSE_WAIT_1: | |
699 | cxgbi_sock_closed(csk); | |
700 | break; | |
701 | case CTP_ABORTING: | |
702 | break; | |
703 | default: | |
704 | pr_err("csk 0x%p,%u,0x%lx,%u, bad state.\n", | |
705 | csk, csk->state, csk->flags, csk->tid); | |
706 | } | |
707 | cxgbi_inform_iscsi_conn_closing(csk); | |
708 | done: | |
709 | spin_unlock_bh(&csk->lock); | |
710 | cxgbi_sock_put(csk); | |
711 | } | |
712 | EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_peer_close); | |
713 | ||
714 | void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *csk, u32 snd_nxt) | |
715 | { | |
716 | log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n", | |
717 | csk, (csk)->state, (csk)->flags, (csk)->tid); | |
718 | cxgbi_sock_get(csk); | |
719 | spin_lock_bh(&csk->lock); | |
720 | ||
721 | csk->snd_una = snd_nxt - 1; | |
722 | if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) | |
723 | goto done; | |
724 | ||
725 | switch (csk->state) { | |
726 | case CTP_ACTIVE_CLOSE: | |
727 | cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_1); | |
728 | break; | |
729 | case CTP_CLOSE_WAIT_1: | |
730 | case CTP_CLOSE_WAIT_2: | |
731 | cxgbi_sock_closed(csk); | |
732 | break; | |
733 | case CTP_ABORTING: | |
734 | break; | |
735 | default: | |
736 | pr_err("csk 0x%p,%u,0x%lx,%u, bad state.\n", | |
737 | csk, csk->state, csk->flags, csk->tid); | |
738 | } | |
739 | done: | |
740 | spin_unlock_bh(&csk->lock); | |
741 | cxgbi_sock_put(csk); | |
742 | } | |
743 | EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_close_conn_rpl); | |
744 | ||
745 | void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *csk, unsigned int credits, | |
746 | unsigned int snd_una, int seq_chk) | |
747 | { | |
748 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
749 | "csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, snd_una %u,%d.\n", | |
750 | csk, csk->state, csk->flags, csk->tid, credits, | |
751 | csk->wr_cred, csk->wr_una_cred, snd_una, seq_chk); | |
752 | ||
753 | spin_lock_bh(&csk->lock); | |
754 | ||
755 | csk->wr_cred += credits; | |
756 | if (csk->wr_una_cred > csk->wr_max_cred - csk->wr_cred) | |
757 | csk->wr_una_cred = csk->wr_max_cred - csk->wr_cred; | |
758 | ||
759 | while (credits) { | |
760 | struct sk_buff *p = cxgbi_sock_peek_wr(csk); | |
761 | ||
762 | if (unlikely(!p)) { | |
763 | pr_err("csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, empty.\n", | |
764 | csk, csk->state, csk->flags, csk->tid, credits, | |
765 | csk->wr_cred, csk->wr_una_cred); | |
766 | break; | |
767 | } | |
768 | ||
769 | if (unlikely(credits < p->csum)) { | |
770 | pr_warn("csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, < %u.\n", | |
771 | csk, csk->state, csk->flags, csk->tid, | |
772 | credits, csk->wr_cred, csk->wr_una_cred, | |
773 | p->csum); | |
774 | p->csum -= credits; | |
775 | break; | |
776 | } else { | |
777 | cxgbi_sock_dequeue_wr(csk); | |
778 | credits -= p->csum; | |
779 | kfree_skb(p); | |
780 | } | |
781 | } | |
782 | ||
783 | cxgbi_sock_check_wr_invariants(csk); | |
784 | ||
785 | if (seq_chk) { | |
786 | if (unlikely(before(snd_una, csk->snd_una))) { | |
787 | pr_warn("csk 0x%p,%u,0x%lx,%u, snd_una %u/%u.", | |
788 | csk, csk->state, csk->flags, csk->tid, snd_una, | |
789 | csk->snd_una); | |
790 | goto done; | |
791 | } | |
792 | ||
793 | if (csk->snd_una != snd_una) { | |
794 | csk->snd_una = snd_una; | |
795 | dst_confirm(csk->dst); | |
796 | } | |
797 | } | |
798 | ||
799 | if (skb_queue_len(&csk->write_queue)) { | |
800 | if (csk->cdev->csk_push_tx_frames(csk, 0)) | |
801 | cxgbi_conn_tx_open(csk); | |
802 | } else | |
803 | cxgbi_conn_tx_open(csk); | |
804 | done: | |
805 | spin_unlock_bh(&csk->lock); | |
806 | } | |
807 | EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_wr_ack); | |
808 | ||
809 | static unsigned int cxgbi_sock_find_best_mtu(struct cxgbi_sock *csk, | |
810 | unsigned short mtu) | |
811 | { | |
812 | int i = 0; | |
813 | ||
814 | while (i < csk->cdev->nmtus - 1 && csk->cdev->mtus[i + 1] <= mtu) | |
815 | ++i; | |
816 | ||
817 | return i; | |
818 | } | |
819 | ||
820 | unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *csk, unsigned int pmtu) | |
821 | { | |
822 | unsigned int idx; | |
823 | struct dst_entry *dst = csk->dst; | |
824 | ||
0dbaee3b | 825 | csk->advmss = dst_metric_advmss(dst); |
9ba682f0 | 826 | |
827 | if (csk->advmss > pmtu - 40) | |
828 | csk->advmss = pmtu - 40; | |
829 | if (csk->advmss < csk->cdev->mtus[0] - 40) | |
830 | csk->advmss = csk->cdev->mtus[0] - 40; | |
831 | idx = cxgbi_sock_find_best_mtu(csk, csk->advmss + 40); | |
832 | ||
833 | return idx; | |
834 | } | |
835 | EXPORT_SYMBOL_GPL(cxgbi_sock_select_mss); | |
836 | ||
837 | void cxgbi_sock_skb_entail(struct cxgbi_sock *csk, struct sk_buff *skb) | |
838 | { | |
839 | cxgbi_skcb_tcp_seq(skb) = csk->write_seq; | |
840 | __skb_queue_tail(&csk->write_queue, skb); | |
841 | } | |
842 | EXPORT_SYMBOL_GPL(cxgbi_sock_skb_entail); | |
843 | ||
844 | void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *csk) | |
845 | { | |
846 | struct sk_buff *skb; | |
847 | ||
848 | while ((skb = cxgbi_sock_dequeue_wr(csk)) != NULL) | |
849 | kfree_skb(skb); | |
850 | } | |
851 | EXPORT_SYMBOL_GPL(cxgbi_sock_purge_wr_queue); | |
852 | ||
853 | void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *csk) | |
854 | { | |
855 | int pending = cxgbi_sock_count_pending_wrs(csk); | |
856 | ||
857 | if (unlikely(csk->wr_cred + pending != csk->wr_max_cred)) | |
858 | pr_err("csk 0x%p, tid %u, credit %u + %u != %u.\n", | |
859 | csk, csk->tid, csk->wr_cred, pending, csk->wr_max_cred); | |
860 | } | |
861 | EXPORT_SYMBOL_GPL(cxgbi_sock_check_wr_invariants); | |
862 | ||
863 | static int cxgbi_sock_send_pdus(struct cxgbi_sock *csk, struct sk_buff *skb) | |
864 | { | |
865 | struct cxgbi_device *cdev = csk->cdev; | |
866 | struct sk_buff *next; | |
867 | int err, copied = 0; | |
868 | ||
869 | spin_lock_bh(&csk->lock); | |
870 | ||
871 | if (csk->state != CTP_ESTABLISHED) { | |
872 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
873 | "csk 0x%p,%u,0x%lx,%u, EAGAIN.\n", | |
874 | csk, csk->state, csk->flags, csk->tid); | |
875 | err = -EAGAIN; | |
876 | goto out_err; | |
877 | } | |
878 | ||
879 | if (csk->err) { | |
880 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
881 | "csk 0x%p,%u,0x%lx,%u, EPIPE %d.\n", | |
882 | csk, csk->state, csk->flags, csk->tid, csk->err); | |
883 | err = -EPIPE; | |
884 | goto out_err; | |
885 | } | |
886 | ||
887 | if (csk->write_seq - csk->snd_una >= cdev->snd_win) { | |
888 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
889 | "csk 0x%p,%u,0x%lx,%u, FULL %u-%u >= %u.\n", | |
890 | csk, csk->state, csk->flags, csk->tid, csk->write_seq, | |
891 | csk->snd_una, cdev->snd_win); | |
892 | err = -ENOBUFS; | |
893 | goto out_err; | |
894 | } | |
895 | ||
896 | while (skb) { | |
897 | int frags = skb_shinfo(skb)->nr_frags + | |
898 | (skb->len != skb->data_len); | |
899 | ||
900 | if (unlikely(skb_headroom(skb) < cdev->skb_tx_rsvd)) { | |
901 | pr_err("csk 0x%p, skb head %u < %u.\n", | |
902 | csk, skb_headroom(skb), cdev->skb_tx_rsvd); | |
903 | err = -EINVAL; | |
904 | goto out_err; | |
905 | } | |
906 | ||
907 | if (frags >= SKB_WR_LIST_SIZE) { | |
908 | pr_err("csk 0x%p, frags %d, %u,%u >%u.\n", | |
909 | csk, skb_shinfo(skb)->nr_frags, skb->len, | |
910 | skb->data_len, (uint)(SKB_WR_LIST_SIZE)); | |
911 | err = -EINVAL; | |
912 | goto out_err; | |
913 | } | |
914 | ||
915 | next = skb->next; | |
916 | skb->next = NULL; | |
917 | cxgbi_skcb_set_flag(skb, SKCBF_TX_NEED_HDR); | |
918 | cxgbi_sock_skb_entail(csk, skb); | |
919 | copied += skb->len; | |
920 | csk->write_seq += skb->len + | |
921 | cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); | |
922 | skb = next; | |
923 | } | |
924 | done: | |
925 | if (likely(skb_queue_len(&csk->write_queue))) | |
926 | cdev->csk_push_tx_frames(csk, 1); | |
927 | spin_unlock_bh(&csk->lock); | |
928 | return copied; | |
929 | ||
930 | out_err: | |
931 | if (copied == 0 && err == -EPIPE) | |
932 | copied = csk->err ? csk->err : -EPIPE; | |
933 | else | |
934 | copied = err; | |
935 | goto done; | |
936 | } | |
937 | ||
938 | /* | |
939 | * Direct Data Placement - | |
940 | * Directly place the iSCSI Data-In or Data-Out PDU's payload into pre-posted | |
941 | * final destination host-memory buffers based on the Initiator Task Tag (ITT) | |
942 | * in Data-In or Target Task Tag (TTT) in Data-Out PDUs. | |
943 | * The host memory address is programmed into h/w in the format of pagepod | |
944 | * entries. | |
945 | * The location of the pagepod entry is encoded into ddp tag which is used as | |
946 | * the base for ITT/TTT. | |
947 | */ | |
948 | ||
949 | static unsigned char ddp_page_order[DDP_PGIDX_MAX] = {0, 1, 2, 4}; | |
950 | static unsigned char ddp_page_shift[DDP_PGIDX_MAX] = {12, 13, 14, 16}; | |
951 | static unsigned char page_idx = DDP_PGIDX_MAX; | |
952 | ||
953 | static unsigned char sw_tag_idx_bits; | |
954 | static unsigned char sw_tag_age_bits; | |
955 | ||
956 | /* | |
957 | * Direct-Data Placement page size adjustment | |
958 | */ | |
959 | static int ddp_adjust_page_table(void) | |
960 | { | |
961 | int i; | |
962 | unsigned int base_order, order; | |
963 | ||
964 | if (PAGE_SIZE < (1UL << ddp_page_shift[0])) { | |
965 | pr_info("PAGE_SIZE 0x%lx too small, min 0x%lx\n", | |
966 | PAGE_SIZE, 1UL << ddp_page_shift[0]); | |
967 | return -EINVAL; | |
968 | } | |
969 | ||
970 | base_order = get_order(1UL << ddp_page_shift[0]); | |
971 | order = get_order(1UL << PAGE_SHIFT); | |
972 | ||
973 | for (i = 0; i < DDP_PGIDX_MAX; i++) { | |
974 | /* first is the kernel page size, then just doubling */ | |
975 | ddp_page_order[i] = order - base_order + i; | |
976 | ddp_page_shift[i] = PAGE_SHIFT + i; | |
977 | } | |
978 | return 0; | |
979 | } | |
980 | ||
981 | static int ddp_find_page_index(unsigned long pgsz) | |
982 | { | |
983 | int i; | |
984 | ||
985 | for (i = 0; i < DDP_PGIDX_MAX; i++) { | |
986 | if (pgsz == (1UL << ddp_page_shift[i])) | |
987 | return i; | |
988 | } | |
989 | pr_info("ddp page size %lu not supported.\n", pgsz); | |
990 | return DDP_PGIDX_MAX; | |
991 | } | |
992 | ||
993 | static void ddp_setup_host_page_size(void) | |
994 | { | |
995 | if (page_idx == DDP_PGIDX_MAX) { | |
996 | page_idx = ddp_find_page_index(PAGE_SIZE); | |
997 | ||
998 | if (page_idx == DDP_PGIDX_MAX) { | |
999 | pr_info("system PAGE %lu, update hw.\n", PAGE_SIZE); | |
1000 | if (ddp_adjust_page_table() < 0) { | |
1001 | pr_info("PAGE %lu, disable ddp.\n", PAGE_SIZE); | |
1002 | return; | |
1003 | } | |
1004 | page_idx = ddp_find_page_index(PAGE_SIZE); | |
1005 | } | |
1006 | pr_info("system PAGE %lu, ddp idx %u.\n", PAGE_SIZE, page_idx); | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | void cxgbi_ddp_page_size_factor(int *pgsz_factor) | |
1011 | { | |
1012 | int i; | |
1013 | ||
1014 | for (i = 0; i < DDP_PGIDX_MAX; i++) | |
1015 | pgsz_factor[i] = ddp_page_order[i]; | |
1016 | } | |
1017 | EXPORT_SYMBOL_GPL(cxgbi_ddp_page_size_factor); | |
1018 | ||
1019 | /* | |
1020 | * DDP setup & teardown | |
1021 | */ | |
1022 | ||
1023 | void cxgbi_ddp_ppod_set(struct cxgbi_pagepod *ppod, | |
1024 | struct cxgbi_pagepod_hdr *hdr, | |
1025 | struct cxgbi_gather_list *gl, unsigned int gidx) | |
1026 | { | |
1027 | int i; | |
1028 | ||
1029 | memcpy(ppod, hdr, sizeof(*hdr)); | |
1030 | for (i = 0; i < (PPOD_PAGES_MAX + 1); i++, gidx++) { | |
1031 | ppod->addr[i] = gidx < gl->nelem ? | |
1032 | cpu_to_be64(gl->phys_addr[gidx]) : 0ULL; | |
1033 | } | |
1034 | } | |
1035 | EXPORT_SYMBOL_GPL(cxgbi_ddp_ppod_set); | |
1036 | ||
1037 | void cxgbi_ddp_ppod_clear(struct cxgbi_pagepod *ppod) | |
1038 | { | |
1039 | memset(ppod, 0, sizeof(*ppod)); | |
1040 | } | |
1041 | EXPORT_SYMBOL_GPL(cxgbi_ddp_ppod_clear); | |
1042 | ||
1043 | static inline int ddp_find_unused_entries(struct cxgbi_ddp_info *ddp, | |
1044 | unsigned int start, unsigned int max, | |
1045 | unsigned int count, | |
1046 | struct cxgbi_gather_list *gl) | |
1047 | { | |
1048 | unsigned int i, j, k; | |
1049 | ||
1050 | /* not enough entries */ | |
1051 | if ((max - start) < count) { | |
1052 | log_debug(1 << CXGBI_DBG_DDP, | |
1053 | "NOT enough entries %u+%u < %u.\n", start, count, max); | |
1054 | return -EBUSY; | |
1055 | } | |
1056 | ||
1057 | max -= count; | |
1058 | spin_lock(&ddp->map_lock); | |
1059 | for (i = start; i < max;) { | |
1060 | for (j = 0, k = i; j < count; j++, k++) { | |
1061 | if (ddp->gl_map[k]) | |
1062 | break; | |
1063 | } | |
1064 | if (j == count) { | |
1065 | for (j = 0, k = i; j < count; j++, k++) | |
1066 | ddp->gl_map[k] = gl; | |
1067 | spin_unlock(&ddp->map_lock); | |
1068 | return i; | |
1069 | } | |
1070 | i += j + 1; | |
1071 | } | |
1072 | spin_unlock(&ddp->map_lock); | |
1073 | log_debug(1 << CXGBI_DBG_DDP, | |
1074 | "NO suitable entries %u available.\n", count); | |
1075 | return -EBUSY; | |
1076 | } | |
1077 | ||
1078 | static inline void ddp_unmark_entries(struct cxgbi_ddp_info *ddp, | |
1079 | int start, int count) | |
1080 | { | |
1081 | spin_lock(&ddp->map_lock); | |
1082 | memset(&ddp->gl_map[start], 0, | |
1083 | count * sizeof(struct cxgbi_gather_list *)); | |
1084 | spin_unlock(&ddp->map_lock); | |
1085 | } | |
1086 | ||
1087 | static inline void ddp_gl_unmap(struct pci_dev *pdev, | |
1088 | struct cxgbi_gather_list *gl) | |
1089 | { | |
1090 | int i; | |
1091 | ||
1092 | for (i = 0; i < gl->nelem; i++) | |
1093 | dma_unmap_page(&pdev->dev, gl->phys_addr[i], PAGE_SIZE, | |
1094 | PCI_DMA_FROMDEVICE); | |
1095 | } | |
1096 | ||
1097 | static inline int ddp_gl_map(struct pci_dev *pdev, | |
1098 | struct cxgbi_gather_list *gl) | |
1099 | { | |
1100 | int i; | |
1101 | ||
1102 | for (i = 0; i < gl->nelem; i++) { | |
1103 | gl->phys_addr[i] = dma_map_page(&pdev->dev, gl->pages[i], 0, | |
1104 | PAGE_SIZE, | |
1105 | PCI_DMA_FROMDEVICE); | |
1106 | if (unlikely(dma_mapping_error(&pdev->dev, gl->phys_addr[i]))) { | |
1107 | log_debug(1 << CXGBI_DBG_DDP, | |
1108 | "page %d 0x%p, 0x%p dma mapping err.\n", | |
1109 | i, gl->pages[i], pdev); | |
1110 | goto unmap; | |
1111 | } | |
1112 | } | |
1113 | return i; | |
1114 | unmap: | |
1115 | if (i) { | |
1116 | unsigned int nelem = gl->nelem; | |
1117 | ||
1118 | gl->nelem = i; | |
1119 | ddp_gl_unmap(pdev, gl); | |
1120 | gl->nelem = nelem; | |
1121 | } | |
1122 | return -EINVAL; | |
1123 | } | |
1124 | ||
1125 | static void ddp_release_gl(struct cxgbi_gather_list *gl, | |
1126 | struct pci_dev *pdev) | |
1127 | { | |
1128 | ddp_gl_unmap(pdev, gl); | |
1129 | kfree(gl); | |
1130 | } | |
1131 | ||
1132 | static struct cxgbi_gather_list *ddp_make_gl(unsigned int xferlen, | |
1133 | struct scatterlist *sgl, | |
1134 | unsigned int sgcnt, | |
1135 | struct pci_dev *pdev, | |
1136 | gfp_t gfp) | |
1137 | { | |
1138 | struct cxgbi_gather_list *gl; | |
1139 | struct scatterlist *sg = sgl; | |
1140 | struct page *sgpage = sg_page(sg); | |
1141 | unsigned int sglen = sg->length; | |
1142 | unsigned int sgoffset = sg->offset; | |
1143 | unsigned int npages = (xferlen + sgoffset + PAGE_SIZE - 1) >> | |
1144 | PAGE_SHIFT; | |
1145 | int i = 1, j = 0; | |
1146 | ||
1147 | if (xferlen < DDP_THRESHOLD) { | |
1148 | log_debug(1 << CXGBI_DBG_DDP, | |
1149 | "xfer %u < threshold %u, no ddp.\n", | |
1150 | xferlen, DDP_THRESHOLD); | |
1151 | return NULL; | |
1152 | } | |
1153 | ||
1154 | gl = kzalloc(sizeof(struct cxgbi_gather_list) + | |
1155 | npages * (sizeof(dma_addr_t) + | |
1156 | sizeof(struct page *)), gfp); | |
1157 | if (!gl) { | |
1158 | log_debug(1 << CXGBI_DBG_DDP, | |
1159 | "xfer %u, %u pages, OOM.\n", xferlen, npages); | |
1160 | return NULL; | |
1161 | } | |
1162 | ||
1163 | log_debug(1 << CXGBI_DBG_DDP, | |
1164 | "xfer %u, sgl %u, gl max %u.\n", xferlen, sgcnt, npages); | |
1165 | ||
1166 | gl->pages = (struct page **)&gl->phys_addr[npages]; | |
1167 | gl->nelem = npages; | |
1168 | gl->length = xferlen; | |
1169 | gl->offset = sgoffset; | |
1170 | gl->pages[0] = sgpage; | |
1171 | ||
1172 | for (i = 1, sg = sg_next(sgl), j = 0; i < sgcnt; | |
1173 | i++, sg = sg_next(sg)) { | |
1174 | struct page *page = sg_page(sg); | |
1175 | ||
1176 | if (sgpage == page && sg->offset == sgoffset + sglen) | |
1177 | sglen += sg->length; | |
1178 | else { | |
1179 | /* make sure the sgl is fit for ddp: | |
1180 | * each has the same page size, and | |
1181 | * all of the middle pages are used completely | |
1182 | */ | |
1183 | if ((j && sgoffset) || ((i != sgcnt - 1) && | |
1184 | ((sglen + sgoffset) & ~PAGE_MASK))) { | |
1185 | log_debug(1 << CXGBI_DBG_DDP, | |
1186 | "page %d/%u, %u + %u.\n", | |
1187 | i, sgcnt, sgoffset, sglen); | |
1188 | goto error_out; | |
1189 | } | |
1190 | ||
1191 | j++; | |
1192 | if (j == gl->nelem || sg->offset) { | |
1193 | log_debug(1 << CXGBI_DBG_DDP, | |
1194 | "page %d/%u, offset %u.\n", | |
1195 | j, gl->nelem, sg->offset); | |
1196 | goto error_out; | |
1197 | } | |
1198 | gl->pages[j] = page; | |
1199 | sglen = sg->length; | |
1200 | sgoffset = sg->offset; | |
1201 | sgpage = page; | |
1202 | } | |
1203 | } | |
1204 | gl->nelem = ++j; | |
1205 | ||
1206 | if (ddp_gl_map(pdev, gl) < 0) | |
1207 | goto error_out; | |
1208 | ||
1209 | return gl; | |
1210 | ||
1211 | error_out: | |
1212 | kfree(gl); | |
1213 | return NULL; | |
1214 | } | |
1215 | ||
1216 | static void ddp_tag_release(struct cxgbi_hba *chba, u32 tag) | |
1217 | { | |
1218 | struct cxgbi_device *cdev = chba->cdev; | |
1219 | struct cxgbi_ddp_info *ddp = cdev->ddp; | |
1220 | u32 idx; | |
1221 | ||
1222 | idx = (tag >> PPOD_IDX_SHIFT) & ddp->idx_mask; | |
1223 | if (idx < ddp->nppods) { | |
1224 | struct cxgbi_gather_list *gl = ddp->gl_map[idx]; | |
1225 | unsigned int npods; | |
1226 | ||
1227 | if (!gl || !gl->nelem) { | |
1228 | pr_warn("tag 0x%x, idx %u, gl 0x%p, %u.\n", | |
1229 | tag, idx, gl, gl ? gl->nelem : 0); | |
1230 | return; | |
1231 | } | |
1232 | npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT; | |
1233 | log_debug(1 << CXGBI_DBG_DDP, | |
1234 | "tag 0x%x, release idx %u, npods %u.\n", | |
1235 | tag, idx, npods); | |
1236 | cdev->csk_ddp_clear(chba, tag, idx, npods); | |
1237 | ddp_unmark_entries(ddp, idx, npods); | |
1238 | ddp_release_gl(gl, ddp->pdev); | |
1239 | } else | |
1240 | pr_warn("tag 0x%x, idx %u > max %u.\n", tag, idx, ddp->nppods); | |
1241 | } | |
1242 | ||
1243 | static int ddp_tag_reserve(struct cxgbi_sock *csk, unsigned int tid, | |
1244 | u32 sw_tag, u32 *tagp, struct cxgbi_gather_list *gl, | |
1245 | gfp_t gfp) | |
1246 | { | |
1247 | struct cxgbi_device *cdev = csk->cdev; | |
1248 | struct cxgbi_ddp_info *ddp = cdev->ddp; | |
1249 | struct cxgbi_tag_format *tformat = &cdev->tag_format; | |
1250 | struct cxgbi_pagepod_hdr hdr; | |
1251 | unsigned int npods; | |
1252 | int idx = -1; | |
1253 | int err = -ENOMEM; | |
1254 | u32 tag; | |
1255 | ||
1256 | npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT; | |
1257 | if (ddp->idx_last == ddp->nppods) | |
1258 | idx = ddp_find_unused_entries(ddp, 0, ddp->nppods, | |
1259 | npods, gl); | |
1260 | else { | |
1261 | idx = ddp_find_unused_entries(ddp, ddp->idx_last + 1, | |
1262 | ddp->nppods, npods, | |
1263 | gl); | |
1264 | if (idx < 0 && ddp->idx_last >= npods) { | |
1265 | idx = ddp_find_unused_entries(ddp, 0, | |
1266 | min(ddp->idx_last + npods, ddp->nppods), | |
1267 | npods, gl); | |
1268 | } | |
1269 | } | |
1270 | if (idx < 0) { | |
1271 | log_debug(1 << CXGBI_DBG_DDP, | |
1272 | "xferlen %u, gl %u, npods %u NO DDP.\n", | |
1273 | gl->length, gl->nelem, npods); | |
1274 | return idx; | |
1275 | } | |
1276 | ||
9ba682f0 | 1277 | tag = cxgbi_ddp_tag_base(tformat, sw_tag); |
1278 | tag |= idx << PPOD_IDX_SHIFT; | |
1279 | ||
1280 | hdr.rsvd = 0; | |
1281 | hdr.vld_tid = htonl(PPOD_VALID_FLAG | PPOD_TID(tid)); | |
1282 | hdr.pgsz_tag_clr = htonl(tag & ddp->rsvd_tag_mask); | |
1283 | hdr.max_offset = htonl(gl->length); | |
1284 | hdr.page_offset = htonl(gl->offset); | |
1285 | ||
1286 | err = cdev->csk_ddp_set(csk, &hdr, idx, npods, gl); | |
b8ce8b59 | 1287 | if (err < 0) |
9ba682f0 | 1288 | goto unmark_entries; |
9ba682f0 | 1289 | |
1290 | ddp->idx_last = idx; | |
1291 | log_debug(1 << CXGBI_DBG_DDP, | |
1292 | "xfer %u, gl %u,%u, tid 0x%x, tag 0x%x->0x%x(%u,%u).\n", | |
1293 | gl->length, gl->nelem, gl->offset, tid, sw_tag, tag, idx, | |
1294 | npods); | |
1295 | *tagp = tag; | |
1296 | return 0; | |
1297 | ||
1298 | unmark_entries: | |
1299 | ddp_unmark_entries(ddp, idx, npods); | |
1300 | return err; | |
1301 | } | |
1302 | ||
1303 | int cxgbi_ddp_reserve(struct cxgbi_sock *csk, unsigned int *tagp, | |
1304 | unsigned int sw_tag, unsigned int xferlen, | |
1305 | struct scatterlist *sgl, unsigned int sgcnt, gfp_t gfp) | |
1306 | { | |
1307 | struct cxgbi_device *cdev = csk->cdev; | |
1308 | struct cxgbi_tag_format *tformat = &cdev->tag_format; | |
1309 | struct cxgbi_gather_list *gl; | |
1310 | int err; | |
1311 | ||
1312 | if (page_idx >= DDP_PGIDX_MAX || !cdev->ddp || | |
1313 | xferlen < DDP_THRESHOLD) { | |
1314 | log_debug(1 << CXGBI_DBG_DDP, | |
1315 | "pgidx %u, xfer %u, NO ddp.\n", page_idx, xferlen); | |
1316 | return -EINVAL; | |
1317 | } | |
1318 | ||
1319 | if (!cxgbi_sw_tag_usable(tformat, sw_tag)) { | |
1320 | log_debug(1 << CXGBI_DBG_DDP, | |
1321 | "sw_tag 0x%x NOT usable.\n", sw_tag); | |
1322 | return -EINVAL; | |
1323 | } | |
1324 | ||
1325 | gl = ddp_make_gl(xferlen, sgl, sgcnt, cdev->pdev, gfp); | |
1326 | if (!gl) | |
1327 | return -ENOMEM; | |
1328 | ||
1329 | err = ddp_tag_reserve(csk, csk->tid, sw_tag, tagp, gl, gfp); | |
1330 | if (err < 0) | |
1331 | ddp_release_gl(gl, cdev->pdev); | |
1332 | ||
1333 | return err; | |
1334 | } | |
1335 | ||
1336 | static void ddp_destroy(struct kref *kref) | |
1337 | { | |
1338 | struct cxgbi_ddp_info *ddp = container_of(kref, | |
1339 | struct cxgbi_ddp_info, | |
1340 | refcnt); | |
1341 | struct cxgbi_device *cdev = ddp->cdev; | |
1342 | int i = 0; | |
1343 | ||
1344 | pr_info("kref 0, destroy ddp 0x%p, cdev 0x%p.\n", ddp, cdev); | |
1345 | ||
1346 | while (i < ddp->nppods) { | |
1347 | struct cxgbi_gather_list *gl = ddp->gl_map[i]; | |
1348 | ||
1349 | if (gl) { | |
1350 | int npods = (gl->nelem + PPOD_PAGES_MAX - 1) | |
1351 | >> PPOD_PAGES_SHIFT; | |
1352 | pr_info("cdev 0x%p, ddp %d + %d.\n", cdev, i, npods); | |
1353 | kfree(gl); | |
9ba682f0 | 1354 | i += npods; |
1355 | } else | |
1356 | i++; | |
1357 | } | |
1358 | cxgbi_free_big_mem(ddp); | |
1359 | } | |
1360 | ||
1361 | int cxgbi_ddp_cleanup(struct cxgbi_device *cdev) | |
1362 | { | |
1363 | struct cxgbi_ddp_info *ddp = cdev->ddp; | |
1364 | ||
1365 | log_debug(1 << CXGBI_DBG_DDP, | |
1366 | "cdev 0x%p, release ddp 0x%p.\n", cdev, ddp); | |
1367 | cdev->ddp = NULL; | |
1368 | if (ddp) | |
1369 | return kref_put(&ddp->refcnt, ddp_destroy); | |
1370 | return 0; | |
1371 | } | |
1372 | EXPORT_SYMBOL_GPL(cxgbi_ddp_cleanup); | |
1373 | ||
1374 | int cxgbi_ddp_init(struct cxgbi_device *cdev, | |
1375 | unsigned int llimit, unsigned int ulimit, | |
1376 | unsigned int max_txsz, unsigned int max_rxsz) | |
1377 | { | |
1378 | struct cxgbi_ddp_info *ddp; | |
1379 | unsigned int ppmax, bits; | |
1380 | ||
1381 | ppmax = (ulimit - llimit + 1) >> PPOD_SIZE_SHIFT; | |
1382 | bits = __ilog2_u32(ppmax) + 1; | |
1383 | if (bits > PPOD_IDX_MAX_SIZE) | |
1384 | bits = PPOD_IDX_MAX_SIZE; | |
1385 | ppmax = (1 << (bits - 1)) - 1; | |
1386 | ||
1387 | ddp = cxgbi_alloc_big_mem(sizeof(struct cxgbi_ddp_info) + | |
1388 | ppmax * (sizeof(struct cxgbi_gather_list *) + | |
1389 | sizeof(struct sk_buff *)), | |
1390 | GFP_KERNEL); | |
1391 | if (!ddp) { | |
1392 | pr_warn("cdev 0x%p, ddp ppmax %u OOM.\n", cdev, ppmax); | |
1393 | return -ENOMEM; | |
1394 | } | |
1395 | ddp->gl_map = (struct cxgbi_gather_list **)(ddp + 1); | |
9ba682f0 | 1396 | cdev->ddp = ddp; |
1397 | ||
1398 | spin_lock_init(&ddp->map_lock); | |
1399 | kref_init(&ddp->refcnt); | |
1400 | ||
1401 | ddp->cdev = cdev; | |
1402 | ddp->pdev = cdev->pdev; | |
1403 | ddp->llimit = llimit; | |
1404 | ddp->ulimit = ulimit; | |
1405 | ddp->max_txsz = min_t(unsigned int, max_txsz, ULP2_MAX_PKT_SIZE); | |
1406 | ddp->max_rxsz = min_t(unsigned int, max_rxsz, ULP2_MAX_PKT_SIZE); | |
1407 | ddp->nppods = ppmax; | |
1408 | ddp->idx_last = ppmax; | |
1409 | ddp->idx_bits = bits; | |
1410 | ddp->idx_mask = (1 << bits) - 1; | |
1411 | ddp->rsvd_tag_mask = (1 << (bits + PPOD_IDX_SHIFT)) - 1; | |
1412 | ||
1413 | cdev->tag_format.sw_bits = sw_tag_idx_bits + sw_tag_age_bits; | |
1414 | cdev->tag_format.rsvd_bits = ddp->idx_bits; | |
1415 | cdev->tag_format.rsvd_shift = PPOD_IDX_SHIFT; | |
1416 | cdev->tag_format.rsvd_mask = (1 << cdev->tag_format.rsvd_bits) - 1; | |
1417 | ||
1418 | pr_info("%s tag format, sw %u, rsvd %u,%u, mask 0x%x.\n", | |
1419 | cdev->ports[0]->name, cdev->tag_format.sw_bits, | |
1420 | cdev->tag_format.rsvd_bits, cdev->tag_format.rsvd_shift, | |
1421 | cdev->tag_format.rsvd_mask); | |
1422 | ||
1423 | cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, | |
1424 | ddp->max_txsz - ISCSI_PDU_NONPAYLOAD_LEN); | |
1425 | cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, | |
1426 | ddp->max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN); | |
1427 | ||
1428 | log_debug(1 << CXGBI_DBG_DDP, | |
1429 | "%s max payload size: %u/%u, %u/%u.\n", | |
1430 | cdev->ports[0]->name, cdev->tx_max_size, ddp->max_txsz, | |
1431 | cdev->rx_max_size, ddp->max_rxsz); | |
1432 | return 0; | |
1433 | } | |
1434 | EXPORT_SYMBOL_GPL(cxgbi_ddp_init); | |
1435 | ||
1436 | /* | |
1437 | * APIs interacting with open-iscsi libraries | |
1438 | */ | |
1439 | ||
1440 | static unsigned char padding[4]; | |
1441 | ||
1442 | static void task_release_itt(struct iscsi_task *task, itt_t hdr_itt) | |
1443 | { | |
1444 | struct scsi_cmnd *sc = task->sc; | |
1445 | struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data; | |
1446 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
1447 | struct cxgbi_hba *chba = cconn->chba; | |
1448 | struct cxgbi_tag_format *tformat = &chba->cdev->tag_format; | |
1449 | u32 tag = ntohl((__force u32)hdr_itt); | |
1450 | ||
1451 | log_debug(1 << CXGBI_DBG_DDP, | |
1452 | "cdev 0x%p, release tag 0x%x.\n", chba->cdev, tag); | |
1453 | if (sc && | |
1454 | (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE) && | |
1455 | cxgbi_is_ddp_tag(tformat, tag)) | |
1456 | ddp_tag_release(chba, tag); | |
1457 | } | |
1458 | ||
1459 | static int task_reserve_itt(struct iscsi_task *task, itt_t *hdr_itt) | |
1460 | { | |
1461 | struct scsi_cmnd *sc = task->sc; | |
1462 | struct iscsi_conn *conn = task->conn; | |
1463 | struct iscsi_session *sess = conn->session; | |
1464 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
1465 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
1466 | struct cxgbi_hba *chba = cconn->chba; | |
1467 | struct cxgbi_tag_format *tformat = &chba->cdev->tag_format; | |
1468 | u32 sw_tag = (sess->age << cconn->task_idx_bits) | task->itt; | |
1469 | u32 tag = 0; | |
1470 | int err = -EINVAL; | |
1471 | ||
1472 | if (sc && | |
1473 | (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE)) { | |
1474 | err = cxgbi_ddp_reserve(cconn->cep->csk, &tag, sw_tag, | |
1475 | scsi_in(sc)->length, | |
1476 | scsi_in(sc)->table.sgl, | |
1477 | scsi_in(sc)->table.nents, | |
1478 | GFP_ATOMIC); | |
1479 | if (err < 0) | |
1480 | log_debug(1 << CXGBI_DBG_DDP, | |
1481 | "csk 0x%p, R task 0x%p, %u,%u, no ddp.\n", | |
1482 | cconn->cep->csk, task, scsi_in(sc)->length, | |
1483 | scsi_in(sc)->table.nents); | |
1484 | } | |
1485 | ||
1486 | if (err < 0) | |
1487 | tag = cxgbi_set_non_ddp_tag(tformat, sw_tag); | |
1488 | /* the itt need to sent in big-endian order */ | |
1489 | *hdr_itt = (__force itt_t)htonl(tag); | |
1490 | ||
1491 | log_debug(1 << CXGBI_DBG_DDP, | |
1492 | "cdev 0x%p, task 0x%p, 0x%x(0x%x,0x%x)->0x%x/0x%x.\n", | |
1493 | chba->cdev, task, sw_tag, task->itt, sess->age, tag, *hdr_itt); | |
1494 | return 0; | |
1495 | } | |
1496 | ||
1497 | void cxgbi_parse_pdu_itt(struct iscsi_conn *conn, itt_t itt, int *idx, int *age) | |
1498 | { | |
1499 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
1500 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
1501 | struct cxgbi_device *cdev = cconn->chba->cdev; | |
1502 | u32 tag = ntohl((__force u32) itt); | |
1503 | u32 sw_bits; | |
1504 | ||
1505 | sw_bits = cxgbi_tag_nonrsvd_bits(&cdev->tag_format, tag); | |
1506 | if (idx) | |
1507 | *idx = sw_bits & ((1 << cconn->task_idx_bits) - 1); | |
1508 | if (age) | |
1509 | *age = (sw_bits >> cconn->task_idx_bits) & ISCSI_AGE_MASK; | |
1510 | ||
1511 | log_debug(1 << CXGBI_DBG_DDP, | |
1512 | "cdev 0x%p, tag 0x%x/0x%x, -> 0x%x(0x%x,0x%x).\n", | |
1513 | cdev, tag, itt, sw_bits, idx ? *idx : 0xFFFFF, | |
1514 | age ? *age : 0xFF); | |
1515 | } | |
1516 | EXPORT_SYMBOL_GPL(cxgbi_parse_pdu_itt); | |
1517 | ||
1518 | void cxgbi_conn_tx_open(struct cxgbi_sock *csk) | |
1519 | { | |
1520 | struct iscsi_conn *conn = csk->user_data; | |
1521 | ||
1522 | if (conn) { | |
1523 | log_debug(1 << CXGBI_DBG_SOCK, | |
1524 | "csk 0x%p, cid %d.\n", csk, conn->id); | |
1525 | iscsi_conn_queue_work(conn); | |
1526 | } | |
1527 | } | |
1528 | EXPORT_SYMBOL_GPL(cxgbi_conn_tx_open); | |
1529 | ||
1530 | /* | |
1531 | * pdu receive, interact with libiscsi_tcp | |
1532 | */ | |
1533 | static inline int read_pdu_skb(struct iscsi_conn *conn, | |
1534 | struct sk_buff *skb, | |
1535 | unsigned int offset, | |
1536 | int offloaded) | |
1537 | { | |
1538 | int status = 0; | |
1539 | int bytes_read; | |
1540 | ||
1541 | bytes_read = iscsi_tcp_recv_skb(conn, skb, offset, offloaded, &status); | |
1542 | switch (status) { | |
1543 | case ISCSI_TCP_CONN_ERR: | |
1544 | pr_info("skb 0x%p, off %u, %d, TCP_ERR.\n", | |
1545 | skb, offset, offloaded); | |
1546 | return -EIO; | |
1547 | case ISCSI_TCP_SUSPENDED: | |
1548 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1549 | "skb 0x%p, off %u, %d, TCP_SUSPEND, rc %d.\n", | |
1550 | skb, offset, offloaded, bytes_read); | |
1551 | /* no transfer - just have caller flush queue */ | |
1552 | return bytes_read; | |
1553 | case ISCSI_TCP_SKB_DONE: | |
1554 | pr_info("skb 0x%p, off %u, %d, TCP_SKB_DONE.\n", | |
1555 | skb, offset, offloaded); | |
1556 | /* | |
1557 | * pdus should always fit in the skb and we should get | |
1558 | * segment done notifcation. | |
1559 | */ | |
1560 | iscsi_conn_printk(KERN_ERR, conn, "Invalid pdu or skb."); | |
1561 | return -EFAULT; | |
1562 | case ISCSI_TCP_SEGMENT_DONE: | |
1563 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1564 | "skb 0x%p, off %u, %d, TCP_SEG_DONE, rc %d.\n", | |
1565 | skb, offset, offloaded, bytes_read); | |
1566 | return bytes_read; | |
1567 | default: | |
1568 | pr_info("skb 0x%p, off %u, %d, invalid status %d.\n", | |
1569 | skb, offset, offloaded, status); | |
1570 | return -EINVAL; | |
1571 | } | |
1572 | } | |
1573 | ||
1574 | static int skb_read_pdu_bhs(struct iscsi_conn *conn, struct sk_buff *skb) | |
1575 | { | |
1576 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
1577 | ||
1578 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1579 | "conn 0x%p, skb 0x%p, len %u, flag 0x%lx.\n", | |
1580 | conn, skb, skb->len, cxgbi_skcb_flags(skb)); | |
1581 | ||
1582 | if (!iscsi_tcp_recv_segment_is_hdr(tcp_conn)) { | |
1583 | pr_info("conn 0x%p, skb 0x%p, not hdr.\n", conn, skb); | |
1584 | iscsi_conn_failure(conn, ISCSI_ERR_PROTO); | |
1585 | return -EIO; | |
1586 | } | |
1587 | ||
1588 | if (conn->hdrdgst_en && | |
1589 | cxgbi_skcb_test_flag(skb, SKCBF_RX_HCRC_ERR)) { | |
1590 | pr_info("conn 0x%p, skb 0x%p, hcrc.\n", conn, skb); | |
1591 | iscsi_conn_failure(conn, ISCSI_ERR_HDR_DGST); | |
1592 | return -EIO; | |
1593 | } | |
1594 | ||
1595 | return read_pdu_skb(conn, skb, 0, 0); | |
1596 | } | |
1597 | ||
1598 | static int skb_read_pdu_data(struct iscsi_conn *conn, struct sk_buff *lskb, | |
1599 | struct sk_buff *skb, unsigned int offset) | |
1600 | { | |
1601 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
1602 | bool offloaded = 0; | |
1603 | int opcode = tcp_conn->in.hdr->opcode & ISCSI_OPCODE_MASK; | |
1604 | ||
1605 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1606 | "conn 0x%p, skb 0x%p, len %u, flag 0x%lx.\n", | |
1607 | conn, skb, skb->len, cxgbi_skcb_flags(skb)); | |
1608 | ||
1609 | if (conn->datadgst_en && | |
1610 | cxgbi_skcb_test_flag(lskb, SKCBF_RX_DCRC_ERR)) { | |
1611 | pr_info("conn 0x%p, skb 0x%p, dcrc 0x%lx.\n", | |
1612 | conn, lskb, cxgbi_skcb_flags(lskb)); | |
1613 | iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST); | |
1614 | return -EIO; | |
1615 | } | |
1616 | ||
1617 | if (iscsi_tcp_recv_segment_is_hdr(tcp_conn)) | |
1618 | return 0; | |
1619 | ||
1620 | /* coalesced, add header digest length */ | |
1621 | if (lskb == skb && conn->hdrdgst_en) | |
1622 | offset += ISCSI_DIGEST_SIZE; | |
1623 | ||
1624 | if (cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA_DDPD)) | |
1625 | offloaded = 1; | |
1626 | ||
1627 | if (opcode == ISCSI_OP_SCSI_DATA_IN) | |
1628 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1629 | "skb 0x%p, op 0x%x, itt 0x%x, %u %s ddp'ed.\n", | |
1630 | skb, opcode, ntohl(tcp_conn->in.hdr->itt), | |
1631 | tcp_conn->in.datalen, offloaded ? "is" : "not"); | |
1632 | ||
1633 | return read_pdu_skb(conn, skb, offset, offloaded); | |
1634 | } | |
1635 | ||
1636 | static void csk_return_rx_credits(struct cxgbi_sock *csk, int copied) | |
1637 | { | |
1638 | struct cxgbi_device *cdev = csk->cdev; | |
1639 | int must_send; | |
1640 | u32 credits; | |
1641 | ||
1642 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1643 | "csk 0x%p,%u,0x%lu,%u, seq %u, wup %u, thre %u, %u.\n", | |
1644 | csk, csk->state, csk->flags, csk->tid, csk->copied_seq, | |
1645 | csk->rcv_wup, cdev->rx_credit_thres, | |
1646 | cdev->rcv_win); | |
1647 | ||
1648 | if (csk->state != CTP_ESTABLISHED) | |
1649 | return; | |
1650 | ||
1651 | credits = csk->copied_seq - csk->rcv_wup; | |
1652 | if (unlikely(!credits)) | |
1653 | return; | |
1654 | if (unlikely(cdev->rx_credit_thres == 0)) | |
1655 | return; | |
1656 | ||
1657 | must_send = credits + 16384 >= cdev->rcv_win; | |
1658 | if (must_send || credits >= cdev->rx_credit_thres) | |
1659 | csk->rcv_wup += cdev->csk_send_rx_credits(csk, credits); | |
1660 | } | |
1661 | ||
1662 | void cxgbi_conn_pdu_ready(struct cxgbi_sock *csk) | |
1663 | { | |
1664 | struct cxgbi_device *cdev = csk->cdev; | |
1665 | struct iscsi_conn *conn = csk->user_data; | |
1666 | struct sk_buff *skb; | |
1667 | unsigned int read = 0; | |
1668 | int err = 0; | |
1669 | ||
1670 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1671 | "csk 0x%p, conn 0x%p.\n", csk, conn); | |
1672 | ||
1673 | if (unlikely(!conn || conn->suspend_rx)) { | |
1674 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1675 | "csk 0x%p, conn 0x%p, id %d, suspend_rx %lu!\n", | |
1676 | csk, conn, conn ? conn->id : 0xFF, | |
1677 | conn ? conn->suspend_rx : 0xFF); | |
9ba682f0 | 1678 | return; |
1679 | } | |
1680 | ||
1681 | while (!err) { | |
9ba682f0 | 1682 | skb = skb_peek(&csk->receive_queue); |
1683 | if (!skb || | |
1684 | !(cxgbi_skcb_test_flag(skb, SKCBF_RX_STATUS))) { | |
1685 | if (skb) | |
1686 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1687 | "skb 0x%p, NOT ready 0x%lx.\n", | |
1688 | skb, cxgbi_skcb_flags(skb)); | |
9ba682f0 | 1689 | break; |
1690 | } | |
1691 | __skb_unlink(skb, &csk->receive_queue); | |
9ba682f0 | 1692 | |
1693 | read += cxgbi_skcb_rx_pdulen(skb); | |
1694 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1695 | "csk 0x%p, skb 0x%p,%u,f 0x%lx, pdu len %u.\n", | |
1696 | csk, skb, skb->len, cxgbi_skcb_flags(skb), | |
1697 | cxgbi_skcb_rx_pdulen(skb)); | |
1698 | ||
1699 | if (cxgbi_skcb_test_flag(skb, SKCBF_RX_COALESCED)) { | |
1700 | err = skb_read_pdu_bhs(conn, skb); | |
e3d2ad8c | 1701 | if (err < 0) { |
1702 | pr_err("coalesced bhs, csk 0x%p, skb 0x%p,%u, " | |
1703 | "f 0x%lx, plen %u.\n", | |
1704 | csk, skb, skb->len, | |
1705 | cxgbi_skcb_flags(skb), | |
1706 | cxgbi_skcb_rx_pdulen(skb)); | |
1707 | goto skb_done; | |
1708 | } | |
9ba682f0 | 1709 | err = skb_read_pdu_data(conn, skb, skb, |
1710 | err + cdev->skb_rx_extra); | |
e3d2ad8c | 1711 | if (err < 0) |
1712 | pr_err("coalesced data, csk 0x%p, skb 0x%p,%u, " | |
1713 | "f 0x%lx, plen %u.\n", | |
1714 | csk, skb, skb->len, | |
1715 | cxgbi_skcb_flags(skb), | |
1716 | cxgbi_skcb_rx_pdulen(skb)); | |
9ba682f0 | 1717 | } else { |
1718 | err = skb_read_pdu_bhs(conn, skb); | |
e3d2ad8c | 1719 | if (err < 0) { |
1720 | pr_err("bhs, csk 0x%p, skb 0x%p,%u, " | |
1721 | "f 0x%lx, plen %u.\n", | |
1722 | csk, skb, skb->len, | |
1723 | cxgbi_skcb_flags(skb), | |
1724 | cxgbi_skcb_rx_pdulen(skb)); | |
1725 | goto skb_done; | |
1726 | } | |
1727 | ||
9ba682f0 | 1728 | if (cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) { |
1729 | struct sk_buff *dskb; | |
1730 | ||
9ba682f0 | 1731 | dskb = skb_peek(&csk->receive_queue); |
1732 | if (!dskb) { | |
e3d2ad8c | 1733 | pr_err("csk 0x%p, skb 0x%p,%u, f 0x%lx," |
1734 | " plen %u, NO data.\n", | |
1735 | csk, skb, skb->len, | |
1736 | cxgbi_skcb_flags(skb), | |
1737 | cxgbi_skcb_rx_pdulen(skb)); | |
1738 | err = -EIO; | |
1739 | goto skb_done; | |
9ba682f0 | 1740 | } |
1741 | __skb_unlink(dskb, &csk->receive_queue); | |
9ba682f0 | 1742 | |
1743 | err = skb_read_pdu_data(conn, skb, dskb, 0); | |
e3d2ad8c | 1744 | if (err < 0) |
1745 | pr_err("data, csk 0x%p, skb 0x%p,%u, " | |
1746 | "f 0x%lx, plen %u, dskb 0x%p," | |
1747 | "%u.\n", | |
1748 | csk, skb, skb->len, | |
1749 | cxgbi_skcb_flags(skb), | |
1750 | cxgbi_skcb_rx_pdulen(skb), | |
1751 | dskb, dskb->len); | |
9ba682f0 | 1752 | __kfree_skb(dskb); |
1753 | } else | |
1754 | err = skb_read_pdu_data(conn, skb, skb, 0); | |
1755 | } | |
e3d2ad8c | 1756 | skb_done: |
1757 | __kfree_skb(skb); | |
1758 | ||
9ba682f0 | 1759 | if (err < 0) |
1760 | break; | |
9ba682f0 | 1761 | } |
1762 | ||
1763 | log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, read %u.\n", csk, read); | |
1764 | if (read) { | |
1765 | csk->copied_seq += read; | |
1766 | csk_return_rx_credits(csk, read); | |
1767 | conn->rxdata_octets += read; | |
1768 | } | |
1769 | ||
1770 | if (err < 0) { | |
e3d2ad8c | 1771 | pr_info("csk 0x%p, 0x%p, rx failed %d, read %u.\n", |
1772 | csk, conn, err, read); | |
9ba682f0 | 1773 | iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); |
1774 | } | |
1775 | } | |
1776 | EXPORT_SYMBOL_GPL(cxgbi_conn_pdu_ready); | |
1777 | ||
1778 | static int sgl_seek_offset(struct scatterlist *sgl, unsigned int sgcnt, | |
1779 | unsigned int offset, unsigned int *off, | |
1780 | struct scatterlist **sgp) | |
1781 | { | |
1782 | int i; | |
1783 | struct scatterlist *sg; | |
1784 | ||
1785 | for_each_sg(sgl, sg, sgcnt, i) { | |
1786 | if (offset < sg->length) { | |
1787 | *off = offset; | |
1788 | *sgp = sg; | |
1789 | return 0; | |
1790 | } | |
1791 | offset -= sg->length; | |
1792 | } | |
1793 | return -EFAULT; | |
1794 | } | |
1795 | ||
1796 | static int sgl_read_to_frags(struct scatterlist *sg, unsigned int sgoffset, | |
6a39a16a | 1797 | unsigned int dlen, struct page_frag *frags, |
9ba682f0 | 1798 | int frag_max) |
1799 | { | |
1800 | unsigned int datalen = dlen; | |
1801 | unsigned int sglen = sg->length - sgoffset; | |
1802 | struct page *page = sg_page(sg); | |
1803 | int i; | |
1804 | ||
1805 | i = 0; | |
1806 | do { | |
1807 | unsigned int copy; | |
1808 | ||
1809 | if (!sglen) { | |
1810 | sg = sg_next(sg); | |
1811 | if (!sg) { | |
1812 | pr_warn("sg %d NULL, len %u/%u.\n", | |
1813 | i, datalen, dlen); | |
1814 | return -EINVAL; | |
1815 | } | |
1816 | sgoffset = 0; | |
1817 | sglen = sg->length; | |
1818 | page = sg_page(sg); | |
1819 | ||
1820 | } | |
1821 | copy = min(datalen, sglen); | |
1822 | if (i && page == frags[i - 1].page && | |
1823 | sgoffset + sg->offset == | |
6a39a16a IC |
1824 | frags[i - 1].offset + frags[i - 1].size) { |
1825 | frags[i - 1].size += copy; | |
9ba682f0 | 1826 | } else { |
1827 | if (i >= frag_max) { | |
1828 | pr_warn("too many pages %u, dlen %u.\n", | |
1829 | frag_max, dlen); | |
1830 | return -EINVAL; | |
1831 | } | |
1832 | ||
1833 | frags[i].page = page; | |
6a39a16a IC |
1834 | frags[i].offset = sg->offset + sgoffset; |
1835 | frags[i].size = copy; | |
9ba682f0 | 1836 | i++; |
1837 | } | |
1838 | datalen -= copy; | |
1839 | sgoffset += copy; | |
1840 | sglen -= copy; | |
1841 | } while (datalen); | |
1842 | ||
1843 | return i; | |
1844 | } | |
1845 | ||
1846 | int cxgbi_conn_alloc_pdu(struct iscsi_task *task, u8 opcode) | |
1847 | { | |
1848 | struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data; | |
1849 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
1850 | struct cxgbi_device *cdev = cconn->chba->cdev; | |
1851 | struct iscsi_conn *conn = task->conn; | |
1852 | struct iscsi_tcp_task *tcp_task = task->dd_data; | |
e3d2ad8c | 1853 | struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); |
9ba682f0 | 1854 | struct scsi_cmnd *sc = task->sc; |
1855 | int headroom = SKB_TX_ISCSI_PDU_HEADER_MAX; | |
1856 | ||
1857 | tcp_task->dd_data = tdata; | |
1858 | task->hdr = NULL; | |
1859 | ||
1860 | if (SKB_MAX_HEAD(cdev->skb_tx_rsvd) > (512 * MAX_SKB_FRAGS) && | |
1861 | (opcode == ISCSI_OP_SCSI_DATA_OUT || | |
1862 | (opcode == ISCSI_OP_SCSI_CMD && | |
1863 | (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_TO_DEVICE)))) | |
1864 | /* data could goes into skb head */ | |
1865 | headroom += min_t(unsigned int, | |
1866 | SKB_MAX_HEAD(cdev->skb_tx_rsvd), | |
1867 | conn->max_xmit_dlength); | |
1868 | ||
1869 | tdata->skb = alloc_skb(cdev->skb_tx_rsvd + headroom, GFP_ATOMIC); | |
1870 | if (!tdata->skb) { | |
00c4a09b TLSC |
1871 | struct cxgbi_sock *csk = cconn->cep->csk; |
1872 | struct net_device *ndev = cdev->ports[csk->port_id]; | |
1873 | ndev->stats.tx_dropped++; | |
9ba682f0 | 1874 | return -ENOMEM; |
1875 | } | |
1876 | ||
1877 | skb_reserve(tdata->skb, cdev->skb_tx_rsvd); | |
1878 | task->hdr = (struct iscsi_hdr *)tdata->skb->data; | |
1879 | task->hdr_max = SKB_TX_ISCSI_PDU_HEADER_MAX; /* BHS + AHS */ | |
1880 | ||
1881 | /* data_out uses scsi_cmd's itt */ | |
1882 | if (opcode != ISCSI_OP_SCSI_DATA_OUT) | |
1883 | task_reserve_itt(task, &task->hdr->itt); | |
1884 | ||
1885 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX, | |
1886 | "task 0x%p, op 0x%x, skb 0x%p,%u+%u/%u, itt 0x%x.\n", | |
1887 | task, opcode, tdata->skb, cdev->skb_tx_rsvd, headroom, | |
1888 | conn->max_xmit_dlength, ntohl(task->hdr->itt)); | |
1889 | ||
1890 | return 0; | |
1891 | } | |
1892 | EXPORT_SYMBOL_GPL(cxgbi_conn_alloc_pdu); | |
1893 | ||
1894 | static inline void tx_skb_setmode(struct sk_buff *skb, int hcrc, int dcrc) | |
1895 | { | |
c343a01c | 1896 | if (hcrc || dcrc) { |
1897 | u8 submode = 0; | |
9ba682f0 | 1898 | |
c343a01c | 1899 | if (hcrc) |
1900 | submode |= 1; | |
1901 | if (dcrc) | |
1902 | submode |= 2; | |
1903 | cxgbi_skcb_ulp_mode(skb) = (ULP2_MODE_ISCSI << 4) | submode; | |
1904 | } else | |
1905 | cxgbi_skcb_ulp_mode(skb) = 0; | |
9ba682f0 | 1906 | } |
1907 | ||
1908 | int cxgbi_conn_init_pdu(struct iscsi_task *task, unsigned int offset, | |
1909 | unsigned int count) | |
1910 | { | |
1911 | struct iscsi_conn *conn = task->conn; | |
e3d2ad8c | 1912 | struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); |
9ba682f0 | 1913 | struct sk_buff *skb = tdata->skb; |
1914 | unsigned int datalen = count; | |
1915 | int i, padlen = iscsi_padding(count); | |
1916 | struct page *pg; | |
1917 | ||
1918 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX, | |
1919 | "task 0x%p,0x%p, skb 0x%p, 0x%x,0x%x,0x%x, %u+%u.\n", | |
1920 | task, task->sc, skb, (*skb->data) & ISCSI_OPCODE_MASK, | |
1921 | ntohl(task->cmdsn), ntohl(task->hdr->itt), offset, count); | |
1922 | ||
1923 | skb_put(skb, task->hdr_len); | |
1924 | tx_skb_setmode(skb, conn->hdrdgst_en, datalen ? conn->datadgst_en : 0); | |
1925 | if (!count) | |
1926 | return 0; | |
1927 | ||
1928 | if (task->sc) { | |
1929 | struct scsi_data_buffer *sdb = scsi_out(task->sc); | |
1930 | struct scatterlist *sg = NULL; | |
1931 | int err; | |
1932 | ||
1933 | tdata->offset = offset; | |
1934 | tdata->count = count; | |
1935 | err = sgl_seek_offset( | |
1936 | sdb->table.sgl, sdb->table.nents, | |
1937 | tdata->offset, &tdata->sgoffset, &sg); | |
1938 | if (err < 0) { | |
1939 | pr_warn("tpdu, sgl %u, bad offset %u/%u.\n", | |
1940 | sdb->table.nents, tdata->offset, sdb->length); | |
1941 | return err; | |
1942 | } | |
1943 | err = sgl_read_to_frags(sg, tdata->sgoffset, tdata->count, | |
1944 | tdata->frags, MAX_PDU_FRAGS); | |
1945 | if (err < 0) { | |
1946 | pr_warn("tpdu, sgl %u, bad offset %u + %u.\n", | |
1947 | sdb->table.nents, tdata->offset, tdata->count); | |
1948 | return err; | |
1949 | } | |
1950 | tdata->nr_frags = err; | |
1951 | ||
1952 | if (tdata->nr_frags > MAX_SKB_FRAGS || | |
1953 | (padlen && tdata->nr_frags == MAX_SKB_FRAGS)) { | |
1954 | char *dst = skb->data + task->hdr_len; | |
6a39a16a | 1955 | struct page_frag *frag = tdata->frags; |
9ba682f0 | 1956 | |
1957 | /* data fits in the skb's headroom */ | |
1958 | for (i = 0; i < tdata->nr_frags; i++, frag++) { | |
1959 | char *src = kmap_atomic(frag->page, | |
1960 | KM_SOFTIRQ0); | |
1961 | ||
6a39a16a IC |
1962 | memcpy(dst, src+frag->offset, frag->size); |
1963 | dst += frag->size; | |
9ba682f0 | 1964 | kunmap_atomic(src, KM_SOFTIRQ0); |
1965 | } | |
1966 | if (padlen) { | |
1967 | memset(dst, 0, padlen); | |
1968 | padlen = 0; | |
1969 | } | |
1970 | skb_put(skb, count + padlen); | |
1971 | } else { | |
1972 | /* data fit into frag_list */ | |
6a39a16a IC |
1973 | for (i = 0; i < tdata->nr_frags; i++) { |
1974 | __skb_fill_page_desc(skb, i, | |
1975 | tdata->frags[i].page, | |
1976 | tdata->frags[i].offset, | |
1977 | tdata->frags[i].size); | |
1978 | skb_frag_ref(skb, i); | |
1979 | } | |
9ba682f0 | 1980 | skb_shinfo(skb)->nr_frags = tdata->nr_frags; |
1981 | skb->len += count; | |
1982 | skb->data_len += count; | |
1983 | skb->truesize += count; | |
1984 | } | |
1985 | ||
1986 | } else { | |
1987 | pg = virt_to_page(task->data); | |
1988 | ||
1989 | get_page(pg); | |
1990 | skb_fill_page_desc(skb, 0, pg, offset_in_page(task->data), | |
1991 | count); | |
1992 | skb->len += count; | |
1993 | skb->data_len += count; | |
1994 | skb->truesize += count; | |
1995 | } | |
1996 | ||
1997 | if (padlen) { | |
1998 | i = skb_shinfo(skb)->nr_frags; | |
1999 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, | |
2000 | virt_to_page(padding), offset_in_page(padding), | |
2001 | padlen); | |
2002 | ||
2003 | skb->data_len += padlen; | |
2004 | skb->truesize += padlen; | |
2005 | skb->len += padlen; | |
2006 | } | |
2007 | ||
2008 | return 0; | |
2009 | } | |
2010 | EXPORT_SYMBOL_GPL(cxgbi_conn_init_pdu); | |
2011 | ||
2012 | int cxgbi_conn_xmit_pdu(struct iscsi_task *task) | |
2013 | { | |
2014 | struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data; | |
2015 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
e3d2ad8c | 2016 | struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); |
9ba682f0 | 2017 | struct sk_buff *skb = tdata->skb; |
2018 | unsigned int datalen; | |
2019 | int err; | |
2020 | ||
2021 | if (!skb) { | |
2022 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX, | |
2023 | "task 0x%p, skb NULL.\n", task); | |
2024 | return 0; | |
2025 | } | |
2026 | ||
2027 | datalen = skb->data_len; | |
2028 | tdata->skb = NULL; | |
2029 | err = cxgbi_sock_send_pdus(cconn->cep->csk, skb); | |
2030 | if (err > 0) { | |
2031 | int pdulen = err; | |
2032 | ||
2033 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
2034 | "task 0x%p,0x%p, skb 0x%p, len %u/%u, rv %d.\n", | |
2035 | task, task->sc, skb, skb->len, skb->data_len, err); | |
2036 | ||
2037 | if (task->conn->hdrdgst_en) | |
2038 | pdulen += ISCSI_DIGEST_SIZE; | |
2039 | ||
2040 | if (datalen && task->conn->datadgst_en) | |
2041 | pdulen += ISCSI_DIGEST_SIZE; | |
2042 | ||
2043 | task->conn->txdata_octets += pdulen; | |
2044 | return 0; | |
2045 | } | |
2046 | ||
2047 | if (err == -EAGAIN || err == -ENOBUFS) { | |
2048 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
2049 | "task 0x%p, skb 0x%p, len %u/%u, %d EAGAIN.\n", | |
2050 | task, skb, skb->len, skb->data_len, err); | |
2051 | /* reset skb to send when we are called again */ | |
2052 | tdata->skb = skb; | |
2053 | return err; | |
2054 | } | |
2055 | ||
2056 | kfree_skb(skb); | |
2057 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX, | |
2058 | "itt 0x%x, skb 0x%p, len %u/%u, xmit err %d.\n", | |
2059 | task->itt, skb, skb->len, skb->data_len, err); | |
2060 | iscsi_conn_printk(KERN_ERR, task->conn, "xmit err %d.\n", err); | |
2061 | iscsi_conn_failure(task->conn, ISCSI_ERR_XMIT_FAILED); | |
2062 | return err; | |
2063 | } | |
2064 | EXPORT_SYMBOL_GPL(cxgbi_conn_xmit_pdu); | |
2065 | ||
2066 | void cxgbi_cleanup_task(struct iscsi_task *task) | |
2067 | { | |
e3d2ad8c | 2068 | struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); |
9ba682f0 | 2069 | |
2070 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2071 | "task 0x%p, skb 0x%p, itt 0x%x.\n", | |
2072 | task, tdata->skb, task->hdr_itt); | |
2073 | ||
2074 | /* never reached the xmit task callout */ | |
2075 | if (tdata->skb) | |
2076 | __kfree_skb(tdata->skb); | |
2077 | memset(tdata, 0, sizeof(*tdata)); | |
2078 | ||
2079 | task_release_itt(task, task->hdr_itt); | |
2080 | iscsi_tcp_cleanup_task(task); | |
2081 | } | |
2082 | EXPORT_SYMBOL_GPL(cxgbi_cleanup_task); | |
2083 | ||
2084 | void cxgbi_get_conn_stats(struct iscsi_cls_conn *cls_conn, | |
2085 | struct iscsi_stats *stats) | |
2086 | { | |
2087 | struct iscsi_conn *conn = cls_conn->dd_data; | |
2088 | ||
2089 | stats->txdata_octets = conn->txdata_octets; | |
2090 | stats->rxdata_octets = conn->rxdata_octets; | |
2091 | stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; | |
2092 | stats->dataout_pdus = conn->dataout_pdus_cnt; | |
2093 | stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; | |
2094 | stats->datain_pdus = conn->datain_pdus_cnt; | |
2095 | stats->r2t_pdus = conn->r2t_pdus_cnt; | |
2096 | stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; | |
2097 | stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; | |
2098 | stats->digest_err = 0; | |
2099 | stats->timeout_err = 0; | |
2100 | stats->custom_length = 1; | |
2101 | strcpy(stats->custom[0].desc, "eh_abort_cnt"); | |
2102 | stats->custom[0].value = conn->eh_abort_cnt; | |
2103 | } | |
2104 | EXPORT_SYMBOL_GPL(cxgbi_get_conn_stats); | |
2105 | ||
2106 | static int cxgbi_conn_max_xmit_dlength(struct iscsi_conn *conn) | |
2107 | { | |
2108 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
2109 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
2110 | struct cxgbi_device *cdev = cconn->chba->cdev; | |
2111 | unsigned int headroom = SKB_MAX_HEAD(cdev->skb_tx_rsvd); | |
2112 | unsigned int max_def = 512 * MAX_SKB_FRAGS; | |
2113 | unsigned int max = max(max_def, headroom); | |
2114 | ||
2115 | max = min(cconn->chba->cdev->tx_max_size, max); | |
2116 | if (conn->max_xmit_dlength) | |
2117 | conn->max_xmit_dlength = min(conn->max_xmit_dlength, max); | |
2118 | else | |
2119 | conn->max_xmit_dlength = max; | |
2120 | cxgbi_align_pdu_size(conn->max_xmit_dlength); | |
2121 | ||
2122 | return 0; | |
2123 | } | |
2124 | ||
2125 | static int cxgbi_conn_max_recv_dlength(struct iscsi_conn *conn) | |
2126 | { | |
2127 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
2128 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
2129 | unsigned int max = cconn->chba->cdev->rx_max_size; | |
2130 | ||
2131 | cxgbi_align_pdu_size(max); | |
2132 | ||
2133 | if (conn->max_recv_dlength) { | |
2134 | if (conn->max_recv_dlength > max) { | |
2135 | pr_err("MaxRecvDataSegmentLength %u > %u.\n", | |
2136 | conn->max_recv_dlength, max); | |
2137 | return -EINVAL; | |
2138 | } | |
2139 | conn->max_recv_dlength = min(conn->max_recv_dlength, max); | |
2140 | cxgbi_align_pdu_size(conn->max_recv_dlength); | |
2141 | } else | |
2142 | conn->max_recv_dlength = max; | |
2143 | ||
2144 | return 0; | |
2145 | } | |
2146 | ||
2147 | int cxgbi_set_conn_param(struct iscsi_cls_conn *cls_conn, | |
2148 | enum iscsi_param param, char *buf, int buflen) | |
2149 | { | |
2150 | struct iscsi_conn *conn = cls_conn->dd_data; | |
2151 | struct iscsi_session *session = conn->session; | |
2152 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
2153 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
2154 | struct cxgbi_sock *csk = cconn->cep->csk; | |
2155 | int value, err = 0; | |
2156 | ||
2157 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2158 | "cls_conn 0x%p, param %d, buf(%d) %s.\n", | |
2159 | cls_conn, param, buflen, buf); | |
2160 | ||
2161 | switch (param) { | |
2162 | case ISCSI_PARAM_HDRDGST_EN: | |
2163 | err = iscsi_set_param(cls_conn, param, buf, buflen); | |
2164 | if (!err && conn->hdrdgst_en) | |
2165 | err = csk->cdev->csk_ddp_setup_digest(csk, csk->tid, | |
2166 | conn->hdrdgst_en, | |
2167 | conn->datadgst_en, 0); | |
2168 | break; | |
2169 | case ISCSI_PARAM_DATADGST_EN: | |
2170 | err = iscsi_set_param(cls_conn, param, buf, buflen); | |
2171 | if (!err && conn->datadgst_en) | |
2172 | err = csk->cdev->csk_ddp_setup_digest(csk, csk->tid, | |
2173 | conn->hdrdgst_en, | |
2174 | conn->datadgst_en, 0); | |
2175 | break; | |
2176 | case ISCSI_PARAM_MAX_R2T: | |
2177 | sscanf(buf, "%d", &value); | |
2178 | if (value <= 0 || !is_power_of_2(value)) | |
2179 | return -EINVAL; | |
2180 | if (session->max_r2t == value) | |
2181 | break; | |
2182 | iscsi_tcp_r2tpool_free(session); | |
2183 | err = iscsi_set_param(cls_conn, param, buf, buflen); | |
2184 | if (!err && iscsi_tcp_r2tpool_alloc(session)) | |
2185 | return -ENOMEM; | |
2186 | case ISCSI_PARAM_MAX_RECV_DLENGTH: | |
2187 | err = iscsi_set_param(cls_conn, param, buf, buflen); | |
2188 | if (!err) | |
2189 | err = cxgbi_conn_max_recv_dlength(conn); | |
2190 | break; | |
2191 | case ISCSI_PARAM_MAX_XMIT_DLENGTH: | |
2192 | err = iscsi_set_param(cls_conn, param, buf, buflen); | |
2193 | if (!err) | |
2194 | err = cxgbi_conn_max_xmit_dlength(conn); | |
2195 | break; | |
2196 | default: | |
2197 | return iscsi_set_param(cls_conn, param, buf, buflen); | |
2198 | } | |
2199 | return err; | |
2200 | } | |
2201 | EXPORT_SYMBOL_GPL(cxgbi_set_conn_param); | |
2202 | ||
c71b9b66 MC |
2203 | int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param param, |
2204 | char *buf) | |
9ba682f0 | 2205 | { |
c71b9b66 MC |
2206 | struct cxgbi_endpoint *cep = ep->dd_data; |
2207 | struct cxgbi_sock *csk; | |
9ba682f0 | 2208 | int len; |
2209 | ||
2210 | log_debug(1 << CXGBI_DBG_ISCSI, | |
c71b9b66 | 2211 | "cls_conn 0x%p, param %d.\n", ep, param); |
9ba682f0 | 2212 | |
2213 | switch (param) { | |
2214 | case ISCSI_PARAM_CONN_PORT: | |
9ba682f0 | 2215 | case ISCSI_PARAM_CONN_ADDRESS: |
c71b9b66 MC |
2216 | if (!cep) |
2217 | return -ENOTCONN; | |
2218 | ||
2219 | csk = cep->csk; | |
2220 | if (!csk) | |
2221 | return -ENOTCONN; | |
2222 | ||
2223 | return iscsi_conn_get_addr_param((struct sockaddr_storage *) | |
2224 | &csk->daddr, param, buf); | |
9ba682f0 | 2225 | default: |
c71b9b66 | 2226 | return -ENOSYS; |
9ba682f0 | 2227 | } |
2228 | return len; | |
2229 | } | |
c71b9b66 | 2230 | EXPORT_SYMBOL_GPL(cxgbi_get_ep_param); |
9ba682f0 | 2231 | |
2232 | struct iscsi_cls_conn * | |
2233 | cxgbi_create_conn(struct iscsi_cls_session *cls_session, u32 cid) | |
2234 | { | |
2235 | struct iscsi_cls_conn *cls_conn; | |
2236 | struct iscsi_conn *conn; | |
2237 | struct iscsi_tcp_conn *tcp_conn; | |
2238 | struct cxgbi_conn *cconn; | |
2239 | ||
2240 | cls_conn = iscsi_tcp_conn_setup(cls_session, sizeof(*cconn), cid); | |
2241 | if (!cls_conn) | |
2242 | return NULL; | |
2243 | ||
2244 | conn = cls_conn->dd_data; | |
2245 | tcp_conn = conn->dd_data; | |
2246 | cconn = tcp_conn->dd_data; | |
2247 | cconn->iconn = conn; | |
2248 | ||
2249 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2250 | "cid %u(0x%x), cls 0x%p,0x%p, conn 0x%p,0x%p,0x%p.\n", | |
2251 | cid, cid, cls_session, cls_conn, conn, tcp_conn, cconn); | |
2252 | ||
2253 | return cls_conn; | |
2254 | } | |
2255 | EXPORT_SYMBOL_GPL(cxgbi_create_conn); | |
2256 | ||
2257 | int cxgbi_bind_conn(struct iscsi_cls_session *cls_session, | |
2258 | struct iscsi_cls_conn *cls_conn, | |
2259 | u64 transport_eph, int is_leading) | |
2260 | { | |
2261 | struct iscsi_conn *conn = cls_conn->dd_data; | |
2262 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
2263 | struct cxgbi_conn *cconn = tcp_conn->dd_data; | |
2264 | struct iscsi_endpoint *ep; | |
2265 | struct cxgbi_endpoint *cep; | |
2266 | struct cxgbi_sock *csk; | |
2267 | int err; | |
2268 | ||
2269 | ep = iscsi_lookup_endpoint(transport_eph); | |
2270 | if (!ep) | |
2271 | return -EINVAL; | |
2272 | ||
2273 | /* setup ddp pagesize */ | |
2274 | cep = ep->dd_data; | |
2275 | csk = cep->csk; | |
2276 | err = csk->cdev->csk_ddp_setup_pgidx(csk, csk->tid, page_idx, 0); | |
2277 | if (err < 0) | |
2278 | return err; | |
2279 | ||
2280 | err = iscsi_conn_bind(cls_session, cls_conn, is_leading); | |
2281 | if (err) | |
2282 | return -EINVAL; | |
2283 | ||
2284 | /* calculate the tag idx bits needed for this conn based on cmds_max */ | |
2285 | cconn->task_idx_bits = (__ilog2_u32(conn->session->cmds_max - 1)) + 1; | |
2286 | ||
e3d2ad8c | 2287 | write_lock_bh(&csk->callback_lock); |
9ba682f0 | 2288 | csk->user_data = conn; |
2289 | cconn->chba = cep->chba; | |
2290 | cconn->cep = cep; | |
2291 | cep->cconn = cconn; | |
e3d2ad8c | 2292 | write_unlock_bh(&csk->callback_lock); |
9ba682f0 | 2293 | |
2294 | cxgbi_conn_max_xmit_dlength(conn); | |
2295 | cxgbi_conn_max_recv_dlength(conn); | |
2296 | ||
9ba682f0 | 2297 | log_debug(1 << CXGBI_DBG_ISCSI, |
2298 | "cls 0x%p,0x%p, ep 0x%p, cconn 0x%p, csk 0x%p.\n", | |
2299 | cls_session, cls_conn, ep, cconn, csk); | |
2300 | /* init recv engine */ | |
2301 | iscsi_tcp_hdr_recv_prep(tcp_conn); | |
2302 | ||
2303 | return 0; | |
2304 | } | |
2305 | EXPORT_SYMBOL_GPL(cxgbi_bind_conn); | |
2306 | ||
2307 | struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *ep, | |
2308 | u16 cmds_max, u16 qdepth, | |
2309 | u32 initial_cmdsn) | |
2310 | { | |
2311 | struct cxgbi_endpoint *cep; | |
2312 | struct cxgbi_hba *chba; | |
2313 | struct Scsi_Host *shost; | |
2314 | struct iscsi_cls_session *cls_session; | |
2315 | struct iscsi_session *session; | |
2316 | ||
2317 | if (!ep) { | |
2318 | pr_err("missing endpoint.\n"); | |
2319 | return NULL; | |
2320 | } | |
2321 | ||
2322 | cep = ep->dd_data; | |
2323 | chba = cep->chba; | |
2324 | shost = chba->shost; | |
2325 | ||
2326 | BUG_ON(chba != iscsi_host_priv(shost)); | |
2327 | ||
2328 | cls_session = iscsi_session_setup(chba->cdev->itp, shost, | |
2329 | cmds_max, 0, | |
2330 | sizeof(struct iscsi_tcp_task) + | |
2331 | sizeof(struct cxgbi_task_data), | |
2332 | initial_cmdsn, ISCSI_MAX_TARGET); | |
2333 | if (!cls_session) | |
2334 | return NULL; | |
2335 | ||
2336 | session = cls_session->dd_data; | |
2337 | if (iscsi_tcp_r2tpool_alloc(session)) | |
2338 | goto remove_session; | |
2339 | ||
2340 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2341 | "ep 0x%p, cls sess 0x%p.\n", ep, cls_session); | |
2342 | return cls_session; | |
2343 | ||
2344 | remove_session: | |
2345 | iscsi_session_teardown(cls_session); | |
2346 | return NULL; | |
2347 | } | |
2348 | EXPORT_SYMBOL_GPL(cxgbi_create_session); | |
2349 | ||
2350 | void cxgbi_destroy_session(struct iscsi_cls_session *cls_session) | |
2351 | { | |
2352 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2353 | "cls sess 0x%p.\n", cls_session); | |
2354 | ||
2355 | iscsi_tcp_r2tpool_free(cls_session->dd_data); | |
2356 | iscsi_session_teardown(cls_session); | |
2357 | } | |
2358 | EXPORT_SYMBOL_GPL(cxgbi_destroy_session); | |
2359 | ||
2360 | int cxgbi_set_host_param(struct Scsi_Host *shost, enum iscsi_host_param param, | |
2361 | char *buf, int buflen) | |
2362 | { | |
2363 | struct cxgbi_hba *chba = iscsi_host_priv(shost); | |
2364 | ||
2365 | if (!chba->ndev) { | |
2366 | shost_printk(KERN_ERR, shost, "Could not get host param. " | |
2367 | "netdev for host not set.\n"); | |
2368 | return -ENODEV; | |
2369 | } | |
2370 | ||
2371 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2372 | "shost 0x%p, hba 0x%p,%s, param %d, buf(%d) %s.\n", | |
2373 | shost, chba, chba->ndev->name, param, buflen, buf); | |
2374 | ||
2375 | switch (param) { | |
2376 | case ISCSI_HOST_PARAM_IPADDRESS: | |
2377 | { | |
2378 | __be32 addr = in_aton(buf); | |
2379 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2380 | "hba %s, req. ipv4 %pI4.\n", chba->ndev->name, &addr); | |
2381 | cxgbi_set_iscsi_ipv4(chba, addr); | |
2382 | return 0; | |
2383 | } | |
2384 | case ISCSI_HOST_PARAM_HWADDRESS: | |
2385 | case ISCSI_HOST_PARAM_NETDEV_NAME: | |
2386 | return 0; | |
2387 | default: | |
2388 | return iscsi_host_set_param(shost, param, buf, buflen); | |
2389 | } | |
2390 | } | |
2391 | EXPORT_SYMBOL_GPL(cxgbi_set_host_param); | |
2392 | ||
2393 | int cxgbi_get_host_param(struct Scsi_Host *shost, enum iscsi_host_param param, | |
2394 | char *buf) | |
2395 | { | |
2396 | struct cxgbi_hba *chba = iscsi_host_priv(shost); | |
2397 | int len = 0; | |
2398 | ||
2399 | if (!chba->ndev) { | |
2400 | shost_printk(KERN_ERR, shost, "Could not get host param. " | |
2401 | "netdev for host not set.\n"); | |
2402 | return -ENODEV; | |
2403 | } | |
2404 | ||
2405 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2406 | "shost 0x%p, hba 0x%p,%s, param %d.\n", | |
2407 | shost, chba, chba->ndev->name, param); | |
2408 | ||
2409 | switch (param) { | |
2410 | case ISCSI_HOST_PARAM_HWADDRESS: | |
2411 | len = sysfs_format_mac(buf, chba->ndev->dev_addr, 6); | |
2412 | break; | |
2413 | case ISCSI_HOST_PARAM_NETDEV_NAME: | |
2414 | len = sprintf(buf, "%s\n", chba->ndev->name); | |
2415 | break; | |
2416 | case ISCSI_HOST_PARAM_IPADDRESS: | |
2417 | { | |
2418 | __be32 addr; | |
2419 | ||
2420 | addr = cxgbi_get_iscsi_ipv4(chba); | |
2421 | len = sprintf(buf, "%pI4", &addr); | |
2422 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2423 | "hba %s, ipv4 %pI4.\n", chba->ndev->name, &addr); | |
2424 | break; | |
2425 | } | |
2426 | default: | |
2427 | return iscsi_host_get_param(shost, param, buf); | |
2428 | } | |
2429 | ||
2430 | return len; | |
2431 | } | |
2432 | EXPORT_SYMBOL_GPL(cxgbi_get_host_param); | |
2433 | ||
2434 | struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *shost, | |
2435 | struct sockaddr *dst_addr, | |
2436 | int non_blocking) | |
2437 | { | |
2438 | struct iscsi_endpoint *ep; | |
2439 | struct cxgbi_endpoint *cep; | |
2440 | struct cxgbi_hba *hba = NULL; | |
2441 | struct cxgbi_sock *csk; | |
2442 | int err = -EINVAL; | |
2443 | ||
2444 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK, | |
2445 | "shost 0x%p, non_blocking %d, dst_addr 0x%p.\n", | |
2446 | shost, non_blocking, dst_addr); | |
2447 | ||
2448 | if (shost) { | |
2449 | hba = iscsi_host_priv(shost); | |
2450 | if (!hba) { | |
2451 | pr_info("shost 0x%p, priv NULL.\n", shost); | |
2452 | goto err_out; | |
2453 | } | |
2454 | } | |
2455 | ||
2456 | csk = cxgbi_check_route(dst_addr); | |
2457 | if (IS_ERR(csk)) | |
2458 | return (struct iscsi_endpoint *)csk; | |
2459 | cxgbi_sock_get(csk); | |
2460 | ||
2461 | if (!hba) | |
2462 | hba = csk->cdev->hbas[csk->port_id]; | |
2463 | else if (hba != csk->cdev->hbas[csk->port_id]) { | |
2464 | pr_info("Could not connect through requested host %u" | |
2465 | "hba 0x%p != 0x%p (%u).\n", | |
2466 | shost->host_no, hba, | |
2467 | csk->cdev->hbas[csk->port_id], csk->port_id); | |
2468 | err = -ENOSPC; | |
2469 | goto release_conn; | |
2470 | } | |
2471 | ||
2472 | err = sock_get_port(csk); | |
2473 | if (err) | |
2474 | goto release_conn; | |
2475 | ||
2476 | cxgbi_sock_set_state(csk, CTP_CONNECTING); | |
2477 | err = csk->cdev->csk_init_act_open(csk); | |
2478 | if (err) | |
2479 | goto release_conn; | |
2480 | ||
2481 | if (cxgbi_sock_is_closing(csk)) { | |
2482 | err = -ENOSPC; | |
2483 | pr_info("csk 0x%p is closing.\n", csk); | |
2484 | goto release_conn; | |
2485 | } | |
2486 | ||
2487 | ep = iscsi_create_endpoint(sizeof(*cep)); | |
2488 | if (!ep) { | |
2489 | err = -ENOMEM; | |
2490 | pr_info("iscsi alloc ep, OOM.\n"); | |
2491 | goto release_conn; | |
2492 | } | |
2493 | ||
2494 | cep = ep->dd_data; | |
2495 | cep->csk = csk; | |
2496 | cep->chba = hba; | |
2497 | ||
2498 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK, | |
2499 | "ep 0x%p, cep 0x%p, csk 0x%p, hba 0x%p,%s.\n", | |
2500 | ep, cep, csk, hba, hba->ndev->name); | |
2501 | return ep; | |
2502 | ||
2503 | release_conn: | |
2504 | cxgbi_sock_put(csk); | |
2505 | cxgbi_sock_closed(csk); | |
2506 | err_out: | |
2507 | return ERR_PTR(err); | |
2508 | } | |
2509 | EXPORT_SYMBOL_GPL(cxgbi_ep_connect); | |
2510 | ||
2511 | int cxgbi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) | |
2512 | { | |
2513 | struct cxgbi_endpoint *cep = ep->dd_data; | |
2514 | struct cxgbi_sock *csk = cep->csk; | |
2515 | ||
2516 | if (!cxgbi_sock_is_established(csk)) | |
2517 | return 0; | |
2518 | return 1; | |
2519 | } | |
2520 | EXPORT_SYMBOL_GPL(cxgbi_ep_poll); | |
2521 | ||
2522 | void cxgbi_ep_disconnect(struct iscsi_endpoint *ep) | |
2523 | { | |
2524 | struct cxgbi_endpoint *cep = ep->dd_data; | |
2525 | struct cxgbi_conn *cconn = cep->cconn; | |
2526 | struct cxgbi_sock *csk = cep->csk; | |
2527 | ||
2528 | log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK, | |
2529 | "ep 0x%p, cep 0x%p, cconn 0x%p, csk 0x%p,%u,0x%lx.\n", | |
2530 | ep, cep, cconn, csk, csk->state, csk->flags); | |
2531 | ||
2532 | if (cconn && cconn->iconn) { | |
2533 | iscsi_suspend_tx(cconn->iconn); | |
2534 | write_lock_bh(&csk->callback_lock); | |
2535 | cep->csk->user_data = NULL; | |
2536 | cconn->cep = NULL; | |
2537 | write_unlock_bh(&csk->callback_lock); | |
2538 | } | |
2539 | iscsi_destroy_endpoint(ep); | |
2540 | ||
2541 | if (likely(csk->state >= CTP_ESTABLISHED)) | |
2542 | need_active_close(csk); | |
2543 | else | |
2544 | cxgbi_sock_closed(csk); | |
2545 | ||
2546 | cxgbi_sock_put(csk); | |
2547 | } | |
2548 | EXPORT_SYMBOL_GPL(cxgbi_ep_disconnect); | |
2549 | ||
2550 | int cxgbi_iscsi_init(struct iscsi_transport *itp, | |
2551 | struct scsi_transport_template **stt) | |
2552 | { | |
2553 | *stt = iscsi_register_transport(itp); | |
2554 | if (*stt == NULL) { | |
2555 | pr_err("unable to register %s transport 0x%p.\n", | |
2556 | itp->name, itp); | |
2557 | return -ENODEV; | |
2558 | } | |
2559 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2560 | "%s, registered iscsi transport 0x%p.\n", | |
2561 | itp->name, stt); | |
2562 | return 0; | |
2563 | } | |
2564 | EXPORT_SYMBOL_GPL(cxgbi_iscsi_init); | |
2565 | ||
2566 | void cxgbi_iscsi_cleanup(struct iscsi_transport *itp, | |
2567 | struct scsi_transport_template **stt) | |
2568 | { | |
2569 | if (*stt) { | |
2570 | log_debug(1 << CXGBI_DBG_ISCSI, | |
2571 | "de-register transport 0x%p, %s, stt 0x%p.\n", | |
2572 | itp, itp->name, *stt); | |
2573 | *stt = NULL; | |
2574 | iscsi_unregister_transport(itp); | |
2575 | } | |
2576 | } | |
2577 | EXPORT_SYMBOL_GPL(cxgbi_iscsi_cleanup); | |
2578 | ||
587a1f16 | 2579 | umode_t cxgbi_attr_is_visible(int param_type, int param) |
3128c6c7 MC |
2580 | { |
2581 | switch (param_type) { | |
f27fb2ef MC |
2582 | case ISCSI_HOST_PARAM: |
2583 | switch (param) { | |
2584 | case ISCSI_HOST_PARAM_NETDEV_NAME: | |
2585 | case ISCSI_HOST_PARAM_HWADDRESS: | |
2586 | case ISCSI_HOST_PARAM_IPADDRESS: | |
2587 | case ISCSI_HOST_PARAM_INITIATOR_NAME: | |
2588 | return S_IRUGO; | |
2589 | default: | |
2590 | return 0; | |
2591 | } | |
3128c6c7 MC |
2592 | case ISCSI_PARAM: |
2593 | switch (param) { | |
2594 | case ISCSI_PARAM_MAX_RECV_DLENGTH: | |
2595 | case ISCSI_PARAM_MAX_XMIT_DLENGTH: | |
2596 | case ISCSI_PARAM_HDRDGST_EN: | |
2597 | case ISCSI_PARAM_DATADGST_EN: | |
2598 | case ISCSI_PARAM_CONN_ADDRESS: | |
2599 | case ISCSI_PARAM_CONN_PORT: | |
2600 | case ISCSI_PARAM_EXP_STATSN: | |
2601 | case ISCSI_PARAM_PERSISTENT_ADDRESS: | |
2602 | case ISCSI_PARAM_PERSISTENT_PORT: | |
2603 | case ISCSI_PARAM_PING_TMO: | |
2604 | case ISCSI_PARAM_RECV_TMO: | |
1d063c17 MC |
2605 | case ISCSI_PARAM_INITIAL_R2T_EN: |
2606 | case ISCSI_PARAM_MAX_R2T: | |
2607 | case ISCSI_PARAM_IMM_DATA_EN: | |
2608 | case ISCSI_PARAM_FIRST_BURST: | |
2609 | case ISCSI_PARAM_MAX_BURST: | |
2610 | case ISCSI_PARAM_PDU_INORDER_EN: | |
2611 | case ISCSI_PARAM_DATASEQ_INORDER_EN: | |
2612 | case ISCSI_PARAM_ERL: | |
2613 | case ISCSI_PARAM_TARGET_NAME: | |
2614 | case ISCSI_PARAM_TPGT: | |
2615 | case ISCSI_PARAM_USERNAME: | |
2616 | case ISCSI_PARAM_PASSWORD: | |
2617 | case ISCSI_PARAM_USERNAME_IN: | |
2618 | case ISCSI_PARAM_PASSWORD_IN: | |
2619 | case ISCSI_PARAM_FAST_ABORT: | |
2620 | case ISCSI_PARAM_ABORT_TMO: | |
2621 | case ISCSI_PARAM_LU_RESET_TMO: | |
2622 | case ISCSI_PARAM_TGT_RESET_TMO: | |
2623 | case ISCSI_PARAM_IFACE_NAME: | |
2624 | case ISCSI_PARAM_INITIATOR_NAME: | |
3128c6c7 MC |
2625 | return S_IRUGO; |
2626 | default: | |
2627 | return 0; | |
2628 | } | |
2629 | } | |
2630 | ||
2631 | return 0; | |
2632 | } | |
2633 | EXPORT_SYMBOL_GPL(cxgbi_attr_is_visible); | |
2634 | ||
9ba682f0 | 2635 | static int __init libcxgbi_init_module(void) |
2636 | { | |
2637 | sw_tag_idx_bits = (__ilog2_u32(ISCSI_ITT_MASK)) + 1; | |
2638 | sw_tag_age_bits = (__ilog2_u32(ISCSI_AGE_MASK)) + 1; | |
2639 | ||
2640 | pr_info("tag itt 0x%x, %u bits, age 0x%x, %u bits.\n", | |
2641 | ISCSI_ITT_MASK, sw_tag_idx_bits, | |
2642 | ISCSI_AGE_MASK, sw_tag_age_bits); | |
2643 | ||
2644 | ddp_setup_host_page_size(); | |
2645 | return 0; | |
2646 | } | |
2647 | ||
2648 | static void __exit libcxgbi_exit_module(void) | |
2649 | { | |
2650 | cxgbi_device_unregister_all(0xFF); | |
2651 | return; | |
2652 | } | |
2653 | ||
2654 | module_init(libcxgbi_init_module); | |
2655 | module_exit(libcxgbi_exit_module); |