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Commit | Line | Data |
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1da177e4 | 1 | /* |
4a9d2d8b AH |
2 | * This file is part of the zfcp device driver for |
3 | * FCP adapters for IBM System z9 and zSeries. | |
1da177e4 | 4 | * |
4a9d2d8b | 5 | * (C) Copyright IBM Corp. 2002, 2006 |
1da177e4 LT |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2, or (at your option) | |
10 | * any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
21 | ||
4a9d2d8b AH |
22 | /* |
23 | * Driver authors: | |
24 | * Martin Peschke (originator of the driver) | |
25 | * Raimund Schroeder | |
26 | * Aron Zeh | |
27 | * Wolfgang Taphorn | |
28 | * Stefan Bader | |
29 | * Heiko Carstens (kernel 2.6 port of the driver) | |
30 | * Andreas Herrmann | |
31 | * Maxim Shchetynin | |
32 | * Volker Sameske | |
33 | * Ralph Wuerthner | |
34 | */ | |
35 | ||
1da177e4 LT |
36 | #include "zfcp_ext.h" |
37 | ||
38 | /* accumulated log level (module parameter) */ | |
39 | static u32 loglevel = ZFCP_LOG_LEVEL_DEFAULTS; | |
40 | static char *device; | |
41 | /*********************** FUNCTION PROTOTYPES *********************************/ | |
42 | ||
43 | /* written against the module interface */ | |
44 | static int __init zfcp_module_init(void); | |
45 | ||
46 | /* FCP related */ | |
47 | static void zfcp_ns_gid_pn_handler(unsigned long); | |
48 | ||
49 | /* miscellaneous */ | |
4d284cac HC |
50 | static int zfcp_sg_list_alloc(struct zfcp_sg_list *, size_t); |
51 | static void zfcp_sg_list_free(struct zfcp_sg_list *); | |
52 | static int zfcp_sg_list_copy_from_user(struct zfcp_sg_list *, | |
53 | void __user *, size_t); | |
54 | static int zfcp_sg_list_copy_to_user(void __user *, | |
55 | struct zfcp_sg_list *, size_t); | |
bd6ae2f6 | 56 | static long zfcp_cfdc_dev_ioctl(struct file *, unsigned int, unsigned long); |
1da177e4 LT |
57 | |
58 | #define ZFCP_CFDC_IOC_MAGIC 0xDD | |
59 | #define ZFCP_CFDC_IOC \ | |
60 | _IOWR(ZFCP_CFDC_IOC_MAGIC, 0, struct zfcp_cfdc_sense_data) | |
61 | ||
1da177e4 | 62 | |
d54b1fdb | 63 | static const struct file_operations zfcp_cfdc_fops = { |
e183b06b AH |
64 | .unlocked_ioctl = zfcp_cfdc_dev_ioctl, |
65 | #ifdef CONFIG_COMPAT | |
66 | .compat_ioctl = zfcp_cfdc_dev_ioctl | |
67 | #endif | |
1da177e4 LT |
68 | }; |
69 | ||
70 | static struct miscdevice zfcp_cfdc_misc = { | |
71 | .minor = ZFCP_CFDC_DEV_MINOR, | |
72 | .name = ZFCP_CFDC_DEV_NAME, | |
73 | .fops = &zfcp_cfdc_fops | |
74 | }; | |
75 | ||
76 | /*********************** KERNEL/MODULE PARAMETERS ***************************/ | |
77 | ||
78 | /* declare driver module init/cleanup functions */ | |
79 | module_init(zfcp_module_init); | |
80 | ||
4a9d2d8b | 81 | MODULE_AUTHOR("IBM Deutschland Entwicklung GmbH - linux390@de.ibm.com"); |
1da177e4 | 82 | MODULE_DESCRIPTION |
4a9d2d8b | 83 | ("FCP (SCSI over Fibre Channel) HBA driver for IBM System z9 and zSeries"); |
1da177e4 LT |
84 | MODULE_LICENSE("GPL"); |
85 | ||
6f71d9bc | 86 | module_param(device, charp, 0400); |
1da177e4 LT |
87 | MODULE_PARM_DESC(device, "specify initial device"); |
88 | ||
6f71d9bc | 89 | module_param(loglevel, uint, 0400); |
1da177e4 LT |
90 | MODULE_PARM_DESC(loglevel, |
91 | "log levels, 8 nibbles: " | |
92 | "FC ERP QDIO CIO Config FSF SCSI Other, " | |
93 | "levels: 0=none 1=normal 2=devel 3=trace"); | |
94 | ||
1da177e4 LT |
95 | /****************************************************************/ |
96 | /************** Functions without logging ***********************/ | |
97 | /****************************************************************/ | |
98 | ||
99 | void | |
100 | _zfcp_hex_dump(char *addr, int count) | |
101 | { | |
102 | int i; | |
103 | for (i = 0; i < count; i++) { | |
104 | printk("%02x", addr[i]); | |
105 | if ((i % 4) == 3) | |
106 | printk(" "); | |
107 | if ((i % 32) == 31) | |
108 | printk("\n"); | |
109 | } | |
110 | if (((i-1) % 32) != 31) | |
111 | printk("\n"); | |
112 | } | |
113 | ||
fea9d6c7 VS |
114 | |
115 | /****************************************************************/ | |
116 | /****** Functions to handle the request ID hash table ********/ | |
117 | /****************************************************************/ | |
118 | ||
119 | #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF | |
120 | ||
ca2d02c2 | 121 | static int zfcp_reqlist_alloc(struct zfcp_adapter *adapter) |
fea9d6c7 | 122 | { |
ca2d02c2 | 123 | int idx; |
fea9d6c7 VS |
124 | |
125 | adapter->req_list = kcalloc(REQUEST_LIST_SIZE, sizeof(struct list_head), | |
126 | GFP_KERNEL); | |
fea9d6c7 VS |
127 | if (!adapter->req_list) |
128 | return -ENOMEM; | |
129 | ||
ca2d02c2 HC |
130 | for (idx = 0; idx < REQUEST_LIST_SIZE; idx++) |
131 | INIT_LIST_HEAD(&adapter->req_list[idx]); | |
fea9d6c7 VS |
132 | return 0; |
133 | } | |
134 | ||
135 | static void zfcp_reqlist_free(struct zfcp_adapter *adapter) | |
136 | { | |
fea9d6c7 VS |
137 | kfree(adapter->req_list); |
138 | } | |
139 | ||
fea9d6c7 VS |
140 | int zfcp_reqlist_isempty(struct zfcp_adapter *adapter) |
141 | { | |
ca2d02c2 | 142 | unsigned int idx; |
fea9d6c7 | 143 | |
ca2d02c2 HC |
144 | for (idx = 0; idx < REQUEST_LIST_SIZE; idx++) |
145 | if (!list_empty(&adapter->req_list[idx])) | |
fea9d6c7 | 146 | return 0; |
fea9d6c7 VS |
147 | return 1; |
148 | } | |
149 | ||
150 | #undef ZFCP_LOG_AREA | |
151 | ||
1da177e4 LT |
152 | /****************************************************************/ |
153 | /************** Uncategorised Functions *************************/ | |
154 | /****************************************************************/ | |
155 | ||
156 | #define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER | |
157 | ||
1da177e4 LT |
158 | /** |
159 | * zfcp_device_setup - setup function | |
160 | * @str: pointer to parameter string | |
161 | * | |
162 | * Parse "device=..." parameter string. | |
163 | */ | |
164 | static int __init | |
cd8a383e | 165 | zfcp_device_setup(char *devstr) |
1da177e4 | 166 | { |
cd8a383e AH |
167 | char *tmp, *str; |
168 | size_t len; | |
1da177e4 | 169 | |
cd8a383e | 170 | if (!devstr) |
1da177e4 LT |
171 | return 0; |
172 | ||
cd8a383e | 173 | len = strlen(devstr) + 1; |
5cbded58 | 174 | str = kmalloc(len, GFP_KERNEL); |
cd8a383e AH |
175 | if (!str) |
176 | goto err_out; | |
177 | memcpy(str, devstr, len); | |
178 | ||
1da177e4 LT |
179 | tmp = strchr(str, ','); |
180 | if (!tmp) | |
181 | goto err_out; | |
182 | *tmp++ = '\0'; | |
183 | strncpy(zfcp_data.init_busid, str, BUS_ID_SIZE); | |
184 | zfcp_data.init_busid[BUS_ID_SIZE-1] = '\0'; | |
185 | ||
186 | zfcp_data.init_wwpn = simple_strtoull(tmp, &tmp, 0); | |
187 | if (*tmp++ != ',') | |
188 | goto err_out; | |
189 | if (*tmp == '\0') | |
190 | goto err_out; | |
191 | ||
192 | zfcp_data.init_fcp_lun = simple_strtoull(tmp, &tmp, 0); | |
193 | if (*tmp != '\0') | |
194 | goto err_out; | |
cd8a383e | 195 | kfree(str); |
1da177e4 LT |
196 | return 1; |
197 | ||
198 | err_out: | |
199 | ZFCP_LOG_NORMAL("Parse error for device parameter string %s\n", str); | |
cd8a383e | 200 | kfree(str); |
1da177e4 LT |
201 | return 0; |
202 | } | |
203 | ||
204 | static void __init | |
205 | zfcp_init_device_configure(void) | |
206 | { | |
207 | struct zfcp_adapter *adapter; | |
208 | struct zfcp_port *port; | |
209 | struct zfcp_unit *unit; | |
210 | ||
211 | down(&zfcp_data.config_sema); | |
212 | read_lock_irq(&zfcp_data.config_lock); | |
213 | adapter = zfcp_get_adapter_by_busid(zfcp_data.init_busid); | |
214 | if (adapter) | |
215 | zfcp_adapter_get(adapter); | |
216 | read_unlock_irq(&zfcp_data.config_lock); | |
217 | ||
218 | if (adapter == NULL) | |
219 | goto out_adapter; | |
220 | port = zfcp_port_enqueue(adapter, zfcp_data.init_wwpn, 0, 0); | |
221 | if (!port) | |
222 | goto out_port; | |
223 | unit = zfcp_unit_enqueue(port, zfcp_data.init_fcp_lun); | |
224 | if (!unit) | |
225 | goto out_unit; | |
226 | up(&zfcp_data.config_sema); | |
227 | ccw_device_set_online(adapter->ccw_device); | |
228 | zfcp_erp_wait(adapter); | |
229 | down(&zfcp_data.config_sema); | |
230 | zfcp_unit_put(unit); | |
231 | out_unit: | |
232 | zfcp_port_put(port); | |
233 | out_port: | |
234 | zfcp_adapter_put(adapter); | |
235 | out_adapter: | |
236 | up(&zfcp_data.config_sema); | |
237 | return; | |
238 | } | |
239 | ||
dd52e0ea HC |
240 | static int calc_alignment(int size) |
241 | { | |
242 | int align = 1; | |
243 | ||
244 | if (!size) | |
245 | return 0; | |
246 | ||
247 | while ((size - align) > 0) | |
248 | align <<= 1; | |
249 | ||
250 | return align; | |
251 | } | |
252 | ||
1da177e4 LT |
253 | static int __init |
254 | zfcp_module_init(void) | |
255 | { | |
dd52e0ea HC |
256 | int retval = -ENOMEM; |
257 | int size, align; | |
258 | ||
259 | size = sizeof(struct zfcp_fsf_req_qtcb); | |
260 | align = calc_alignment(size); | |
261 | zfcp_data.fsf_req_qtcb_cache = | |
20c2df83 | 262 | kmem_cache_create("zfcp_fsf", size, align, 0, NULL); |
dd52e0ea HC |
263 | if (!zfcp_data.fsf_req_qtcb_cache) |
264 | goto out; | |
1da177e4 | 265 | |
dd52e0ea HC |
266 | size = sizeof(struct fsf_status_read_buffer); |
267 | align = calc_alignment(size); | |
268 | zfcp_data.sr_buffer_cache = | |
20c2df83 | 269 | kmem_cache_create("zfcp_sr", size, align, 0, NULL); |
dd52e0ea HC |
270 | if (!zfcp_data.sr_buffer_cache) |
271 | goto out_sr_cache; | |
272 | ||
273 | size = sizeof(struct zfcp_gid_pn_data); | |
274 | align = calc_alignment(size); | |
275 | zfcp_data.gid_pn_cache = | |
20c2df83 | 276 | kmem_cache_create("zfcp_gid", size, align, 0, NULL); |
dd52e0ea HC |
277 | if (!zfcp_data.gid_pn_cache) |
278 | goto out_gid_cache; | |
1da177e4 LT |
279 | |
280 | atomic_set(&zfcp_data.loglevel, loglevel); | |
281 | ||
282 | /* initialize adapter list */ | |
283 | INIT_LIST_HEAD(&zfcp_data.adapter_list_head); | |
284 | ||
285 | /* initialize adapters to be removed list head */ | |
286 | INIT_LIST_HEAD(&zfcp_data.adapter_remove_lh); | |
287 | ||
dd52e0ea HC |
288 | zfcp_data.scsi_transport_template = |
289 | fc_attach_transport(&zfcp_transport_functions); | |
290 | if (!zfcp_data.scsi_transport_template) | |
291 | goto out_transport; | |
1da177e4 | 292 | |
1da177e4 LT |
293 | retval = misc_register(&zfcp_cfdc_misc); |
294 | if (retval != 0) { | |
295 | ZFCP_LOG_INFO("registration of misc device " | |
296 | "zfcp_cfdc failed\n"); | |
dd52e0ea | 297 | goto out_misc; |
1da177e4 LT |
298 | } |
299 | ||
e183b06b AH |
300 | ZFCP_LOG_TRACE("major/minor for zfcp_cfdc: %d/%d\n", |
301 | ZFCP_CFDC_DEV_MAJOR, zfcp_cfdc_misc.minor); | |
302 | ||
1da177e4 LT |
303 | /* Initialise proc semaphores */ |
304 | sema_init(&zfcp_data.config_sema, 1); | |
305 | ||
306 | /* initialise configuration rw lock */ | |
307 | rwlock_init(&zfcp_data.config_lock); | |
308 | ||
1da177e4 LT |
309 | /* setup dynamic I/O */ |
310 | retval = zfcp_ccw_register(); | |
311 | if (retval) { | |
312 | ZFCP_LOG_NORMAL("registration with common I/O layer failed\n"); | |
313 | goto out_ccw_register; | |
314 | } | |
315 | ||
316 | if (zfcp_device_setup(device)) | |
317 | zfcp_init_device_configure(); | |
318 | ||
319 | goto out; | |
320 | ||
321 | out_ccw_register: | |
322 | misc_deregister(&zfcp_cfdc_misc); | |
dd52e0ea HC |
323 | out_misc: |
324 | fc_release_transport(zfcp_data.scsi_transport_template); | |
325 | out_transport: | |
326 | kmem_cache_destroy(zfcp_data.gid_pn_cache); | |
327 | out_gid_cache: | |
328 | kmem_cache_destroy(zfcp_data.sr_buffer_cache); | |
329 | out_sr_cache: | |
330 | kmem_cache_destroy(zfcp_data.fsf_req_qtcb_cache); | |
1da177e4 LT |
331 | out: |
332 | return retval; | |
333 | } | |
334 | ||
335 | /* | |
336 | * function: zfcp_cfdc_dev_ioctl | |
337 | * | |
338 | * purpose: Handle control file upload/download transaction via IOCTL | |
339 | * interface | |
340 | * | |
341 | * returns: 0 - Operation completed successfuly | |
342 | * -ENOTTY - Unknown IOCTL command | |
343 | * -EINVAL - Invalid sense data record | |
344 | * -ENXIO - The FCP adapter is not available | |
345 | * -EOPNOTSUPP - The FCP adapter does not have CFDC support | |
346 | * -ENOMEM - Insufficient memory | |
347 | * -EFAULT - User space memory I/O operation fault | |
348 | * -EPERM - Cannot create or queue FSF request or create SBALs | |
349 | * -ERESTARTSYS- Received signal (is mapped to EAGAIN by VFS) | |
350 | */ | |
e183b06b AH |
351 | static long |
352 | zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command, | |
353 | unsigned long buffer) | |
1da177e4 LT |
354 | { |
355 | struct zfcp_cfdc_sense_data *sense_data, __user *sense_data_user; | |
356 | struct zfcp_adapter *adapter = NULL; | |
357 | struct zfcp_fsf_req *fsf_req = NULL; | |
358 | struct zfcp_sg_list *sg_list = NULL; | |
359 | u32 fsf_command, option; | |
360 | char *bus_id = NULL; | |
361 | int retval = 0; | |
362 | ||
363 | sense_data = kmalloc(sizeof(struct zfcp_cfdc_sense_data), GFP_KERNEL); | |
364 | if (sense_data == NULL) { | |
365 | retval = -ENOMEM; | |
366 | goto out; | |
367 | } | |
368 | ||
ec4081c6 | 369 | sg_list = kzalloc(sizeof(struct zfcp_sg_list), GFP_KERNEL); |
1da177e4 LT |
370 | if (sg_list == NULL) { |
371 | retval = -ENOMEM; | |
372 | goto out; | |
373 | } | |
1da177e4 LT |
374 | |
375 | if (command != ZFCP_CFDC_IOC) { | |
376 | ZFCP_LOG_INFO("IOC request code 0x%x invalid\n", command); | |
377 | retval = -ENOTTY; | |
378 | goto out; | |
379 | } | |
380 | ||
381 | if ((sense_data_user = (void __user *) buffer) == NULL) { | |
382 | ZFCP_LOG_INFO("sense data record is required\n"); | |
383 | retval = -EINVAL; | |
384 | goto out; | |
385 | } | |
386 | ||
387 | retval = copy_from_user(sense_data, sense_data_user, | |
388 | sizeof(struct zfcp_cfdc_sense_data)); | |
389 | if (retval) { | |
390 | retval = -EFAULT; | |
391 | goto out; | |
392 | } | |
393 | ||
394 | if (sense_data->signature != ZFCP_CFDC_SIGNATURE) { | |
395 | ZFCP_LOG_INFO("invalid sense data request signature 0x%08x\n", | |
396 | ZFCP_CFDC_SIGNATURE); | |
397 | retval = -EINVAL; | |
398 | goto out; | |
399 | } | |
400 | ||
401 | switch (sense_data->command) { | |
402 | ||
403 | case ZFCP_CFDC_CMND_DOWNLOAD_NORMAL: | |
404 | fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; | |
405 | option = FSF_CFDC_OPTION_NORMAL_MODE; | |
406 | break; | |
407 | ||
408 | case ZFCP_CFDC_CMND_DOWNLOAD_FORCE: | |
409 | fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; | |
410 | option = FSF_CFDC_OPTION_FORCE; | |
411 | break; | |
412 | ||
413 | case ZFCP_CFDC_CMND_FULL_ACCESS: | |
414 | fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; | |
415 | option = FSF_CFDC_OPTION_FULL_ACCESS; | |
416 | break; | |
417 | ||
418 | case ZFCP_CFDC_CMND_RESTRICTED_ACCESS: | |
419 | fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; | |
420 | option = FSF_CFDC_OPTION_RESTRICTED_ACCESS; | |
421 | break; | |
422 | ||
423 | case ZFCP_CFDC_CMND_UPLOAD: | |
424 | fsf_command = FSF_QTCB_UPLOAD_CONTROL_FILE; | |
425 | option = 0; | |
426 | break; | |
427 | ||
428 | default: | |
429 | ZFCP_LOG_INFO("invalid command code 0x%08x\n", | |
430 | sense_data->command); | |
431 | retval = -EINVAL; | |
432 | goto out; | |
433 | } | |
434 | ||
435 | bus_id = kmalloc(BUS_ID_SIZE, GFP_KERNEL); | |
436 | if (bus_id == NULL) { | |
437 | retval = -ENOMEM; | |
438 | goto out; | |
439 | } | |
440 | snprintf(bus_id, BUS_ID_SIZE, "%d.%d.%04x", | |
441 | (sense_data->devno >> 24), | |
442 | (sense_data->devno >> 16) & 0xFF, | |
443 | (sense_data->devno & 0xFFFF)); | |
444 | ||
445 | read_lock_irq(&zfcp_data.config_lock); | |
446 | adapter = zfcp_get_adapter_by_busid(bus_id); | |
447 | if (adapter) | |
448 | zfcp_adapter_get(adapter); | |
449 | read_unlock_irq(&zfcp_data.config_lock); | |
450 | ||
451 | kfree(bus_id); | |
452 | ||
453 | if (adapter == NULL) { | |
454 | ZFCP_LOG_INFO("invalid adapter\n"); | |
455 | retval = -ENXIO; | |
456 | goto out; | |
457 | } | |
458 | ||
459 | if (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE) { | |
460 | retval = zfcp_sg_list_alloc(sg_list, | |
461 | ZFCP_CFDC_MAX_CONTROL_FILE_SIZE); | |
462 | if (retval) { | |
463 | retval = -ENOMEM; | |
464 | goto out; | |
465 | } | |
466 | } | |
467 | ||
468 | if ((sense_data->command & ZFCP_CFDC_DOWNLOAD) && | |
469 | (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE)) { | |
470 | retval = zfcp_sg_list_copy_from_user( | |
471 | sg_list, &sense_data_user->control_file, | |
472 | ZFCP_CFDC_MAX_CONTROL_FILE_SIZE); | |
473 | if (retval) { | |
474 | retval = -EFAULT; | |
475 | goto out; | |
476 | } | |
477 | } | |
478 | ||
479 | retval = zfcp_fsf_control_file(adapter, &fsf_req, fsf_command, | |
480 | option, sg_list); | |
481 | if (retval) | |
482 | goto out; | |
483 | ||
484 | if ((fsf_req->qtcb->prefix.prot_status != FSF_PROT_GOOD) && | |
485 | (fsf_req->qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) { | |
486 | retval = -ENXIO; | |
487 | goto out; | |
488 | } | |
489 | ||
490 | sense_data->fsf_status = fsf_req->qtcb->header.fsf_status; | |
491 | memcpy(&sense_data->fsf_status_qual, | |
492 | &fsf_req->qtcb->header.fsf_status_qual, | |
493 | sizeof(union fsf_status_qual)); | |
494 | memcpy(&sense_data->payloads, &fsf_req->qtcb->bottom.support.els, 256); | |
495 | ||
496 | retval = copy_to_user(sense_data_user, sense_data, | |
497 | sizeof(struct zfcp_cfdc_sense_data)); | |
498 | if (retval) { | |
499 | retval = -EFAULT; | |
500 | goto out; | |
501 | } | |
502 | ||
503 | if (sense_data->command & ZFCP_CFDC_UPLOAD) { | |
504 | retval = zfcp_sg_list_copy_to_user( | |
505 | &sense_data_user->control_file, sg_list, | |
506 | ZFCP_CFDC_MAX_CONTROL_FILE_SIZE); | |
507 | if (retval) { | |
508 | retval = -EFAULT; | |
509 | goto out; | |
510 | } | |
511 | } | |
512 | ||
513 | out: | |
514 | if (fsf_req != NULL) | |
1db2c9c0 | 515 | zfcp_fsf_req_free(fsf_req); |
1da177e4 LT |
516 | |
517 | if ((adapter != NULL) && (retval != -ENXIO)) | |
518 | zfcp_adapter_put(adapter); | |
519 | ||
520 | if (sg_list != NULL) { | |
521 | zfcp_sg_list_free(sg_list); | |
522 | kfree(sg_list); | |
523 | } | |
524 | ||
17fd682e | 525 | kfree(sense_data); |
1da177e4 LT |
526 | |
527 | return retval; | |
528 | } | |
529 | ||
530 | ||
531 | /** | |
532 | * zfcp_sg_list_alloc - create a scatter-gather list of the specified size | |
533 | * @sg_list: structure describing a scatter gather list | |
534 | * @size: size of scatter-gather list | |
535 | * Return: 0 on success, else -ENOMEM | |
536 | * | |
537 | * In sg_list->sg a pointer to the created scatter-gather list is returned, | |
538 | * or NULL if we run out of memory. sg_list->count specifies the number of | |
539 | * elements of the scatter-gather list. The maximum size of a single element | |
540 | * in the scatter-gather list is PAGE_SIZE. | |
541 | */ | |
4d284cac | 542 | static int |
1da177e4 LT |
543 | zfcp_sg_list_alloc(struct zfcp_sg_list *sg_list, size_t size) |
544 | { | |
545 | struct scatterlist *sg; | |
546 | unsigned int i; | |
547 | int retval = 0; | |
548 | void *address; | |
549 | ||
550 | BUG_ON(sg_list == NULL); | |
551 | ||
552 | sg_list->count = size >> PAGE_SHIFT; | |
553 | if (size & ~PAGE_MASK) | |
554 | sg_list->count++; | |
ec4081c6 | 555 | sg_list->sg = kcalloc(sg_list->count, sizeof(struct scatterlist), |
1da177e4 LT |
556 | GFP_KERNEL); |
557 | if (sg_list->sg == NULL) { | |
558 | sg_list->count = 0; | |
559 | retval = -ENOMEM; | |
560 | goto out; | |
561 | } | |
1da177e4 LT |
562 | |
563 | for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++) { | |
564 | sg->length = min(size, PAGE_SIZE); | |
565 | sg->offset = 0; | |
566 | address = (void *) get_zeroed_page(GFP_KERNEL); | |
567 | if (address == NULL) { | |
568 | sg_list->count = i; | |
569 | zfcp_sg_list_free(sg_list); | |
570 | retval = -ENOMEM; | |
571 | goto out; | |
572 | } | |
573 | zfcp_address_to_sg(address, sg); | |
574 | size -= sg->length; | |
575 | } | |
576 | ||
577 | out: | |
578 | return retval; | |
579 | } | |
580 | ||
581 | ||
582 | /** | |
583 | * zfcp_sg_list_free - free memory of a scatter-gather list | |
584 | * @sg_list: structure describing a scatter-gather list | |
585 | * | |
586 | * Memory for each element in the scatter-gather list is freed. | |
587 | * Finally sg_list->sg is freed itself and sg_list->count is reset. | |
588 | */ | |
4d284cac | 589 | static void |
1da177e4 LT |
590 | zfcp_sg_list_free(struct zfcp_sg_list *sg_list) |
591 | { | |
592 | struct scatterlist *sg; | |
593 | unsigned int i; | |
594 | ||
595 | BUG_ON(sg_list == NULL); | |
596 | ||
597 | for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++) | |
598 | free_page((unsigned long) zfcp_sg_to_address(sg)); | |
599 | ||
600 | sg_list->count = 0; | |
601 | kfree(sg_list->sg); | |
602 | } | |
603 | ||
604 | /** | |
605 | * zfcp_sg_size - determine size of a scatter-gather list | |
606 | * @sg: array of (struct scatterlist) | |
607 | * @sg_count: elements in array | |
608 | * Return: size of entire scatter-gather list | |
609 | */ | |
763968e2 | 610 | static size_t zfcp_sg_size(struct scatterlist *sg, unsigned int sg_count) |
1da177e4 LT |
611 | { |
612 | unsigned int i; | |
613 | struct scatterlist *p; | |
614 | size_t size; | |
615 | ||
616 | size = 0; | |
617 | for (i = 0, p = sg; i < sg_count; i++, p++) { | |
618 | BUG_ON(p == NULL); | |
619 | size += p->length; | |
620 | } | |
621 | ||
622 | return size; | |
623 | } | |
624 | ||
625 | ||
626 | /** | |
627 | * zfcp_sg_list_copy_from_user -copy data from user space to scatter-gather list | |
628 | * @sg_list: structure describing a scatter-gather list | |
629 | * @user_buffer: pointer to buffer in user space | |
630 | * @size: number of bytes to be copied | |
631 | * Return: 0 on success, -EFAULT if copy_from_user fails. | |
632 | */ | |
4d284cac | 633 | static int |
1da177e4 LT |
634 | zfcp_sg_list_copy_from_user(struct zfcp_sg_list *sg_list, |
635 | void __user *user_buffer, | |
636 | size_t size) | |
637 | { | |
638 | struct scatterlist *sg; | |
639 | unsigned int length; | |
640 | void *zfcp_buffer; | |
641 | int retval = 0; | |
642 | ||
643 | BUG_ON(sg_list == NULL); | |
644 | ||
645 | if (zfcp_sg_size(sg_list->sg, sg_list->count) < size) | |
646 | return -EFAULT; | |
647 | ||
648 | for (sg = sg_list->sg; size > 0; sg++) { | |
649 | length = min((unsigned int)size, sg->length); | |
650 | zfcp_buffer = zfcp_sg_to_address(sg); | |
651 | if (copy_from_user(zfcp_buffer, user_buffer, length)) { | |
652 | retval = -EFAULT; | |
653 | goto out; | |
654 | } | |
655 | user_buffer += length; | |
656 | size -= length; | |
657 | } | |
658 | ||
659 | out: | |
660 | return retval; | |
661 | } | |
662 | ||
663 | ||
664 | /** | |
665 | * zfcp_sg_list_copy_to_user - copy data from scatter-gather list to user space | |
666 | * @user_buffer: pointer to buffer in user space | |
667 | * @sg_list: structure describing a scatter-gather list | |
668 | * @size: number of bytes to be copied | |
669 | * Return: 0 on success, -EFAULT if copy_to_user fails | |
670 | */ | |
4d284cac | 671 | static int |
1da177e4 LT |
672 | zfcp_sg_list_copy_to_user(void __user *user_buffer, |
673 | struct zfcp_sg_list *sg_list, | |
674 | size_t size) | |
675 | { | |
676 | struct scatterlist *sg; | |
677 | unsigned int length; | |
678 | void *zfcp_buffer; | |
679 | int retval = 0; | |
680 | ||
681 | BUG_ON(sg_list == NULL); | |
682 | ||
683 | if (zfcp_sg_size(sg_list->sg, sg_list->count) < size) | |
684 | return -EFAULT; | |
685 | ||
686 | for (sg = sg_list->sg; size > 0; sg++) { | |
687 | length = min((unsigned int) size, sg->length); | |
688 | zfcp_buffer = zfcp_sg_to_address(sg); | |
689 | if (copy_to_user(user_buffer, zfcp_buffer, length)) { | |
690 | retval = -EFAULT; | |
691 | goto out; | |
692 | } | |
693 | user_buffer += length; | |
694 | size -= length; | |
695 | } | |
696 | ||
697 | out: | |
698 | return retval; | |
699 | } | |
700 | ||
701 | ||
702 | #undef ZFCP_LOG_AREA | |
703 | ||
704 | /****************************************************************/ | |
705 | /****** Functions for configuration/set-up of structures ********/ | |
706 | /****************************************************************/ | |
707 | ||
708 | #define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG | |
709 | ||
710 | /** | |
711 | * zfcp_get_unit_by_lun - find unit in unit list of port by FCP LUN | |
712 | * @port: pointer to port to search for unit | |
713 | * @fcp_lun: FCP LUN to search for | |
714 | * Traverse list of all units of a port and return pointer to a unit | |
715 | * with the given FCP LUN. | |
716 | */ | |
717 | struct zfcp_unit * | |
718 | zfcp_get_unit_by_lun(struct zfcp_port *port, fcp_lun_t fcp_lun) | |
719 | { | |
720 | struct zfcp_unit *unit; | |
721 | int found = 0; | |
722 | ||
723 | list_for_each_entry(unit, &port->unit_list_head, list) { | |
724 | if ((unit->fcp_lun == fcp_lun) && | |
725 | !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status)) | |
726 | { | |
727 | found = 1; | |
728 | break; | |
729 | } | |
730 | } | |
731 | return found ? unit : NULL; | |
732 | } | |
733 | ||
734 | /** | |
735 | * zfcp_get_port_by_wwpn - find port in port list of adapter by wwpn | |
736 | * @adapter: pointer to adapter to search for port | |
737 | * @wwpn: wwpn to search for | |
738 | * Traverse list of all ports of an adapter and return pointer to a port | |
739 | * with the given wwpn. | |
740 | */ | |
741 | struct zfcp_port * | |
742 | zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, wwn_t wwpn) | |
743 | { | |
744 | struct zfcp_port *port; | |
745 | int found = 0; | |
746 | ||
747 | list_for_each_entry(port, &adapter->port_list_head, list) { | |
748 | if ((port->wwpn == wwpn) && | |
749 | !(atomic_read(&port->status) & | |
750 | (ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE))) { | |
751 | found = 1; | |
752 | break; | |
753 | } | |
754 | } | |
755 | return found ? port : NULL; | |
756 | } | |
757 | ||
758 | /** | |
759 | * zfcp_get_port_by_did - find port in port list of adapter by d_id | |
760 | * @adapter: pointer to adapter to search for port | |
761 | * @d_id: d_id to search for | |
762 | * Traverse list of all ports of an adapter and return pointer to a port | |
763 | * with the given d_id. | |
764 | */ | |
765 | struct zfcp_port * | |
766 | zfcp_get_port_by_did(struct zfcp_adapter *adapter, u32 d_id) | |
767 | { | |
768 | struct zfcp_port *port; | |
769 | int found = 0; | |
770 | ||
771 | list_for_each_entry(port, &adapter->port_list_head, list) { | |
772 | if ((port->d_id == d_id) && | |
773 | !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) | |
774 | { | |
775 | found = 1; | |
776 | break; | |
777 | } | |
778 | } | |
779 | return found ? port : NULL; | |
780 | } | |
781 | ||
782 | /** | |
783 | * zfcp_get_adapter_by_busid - find adpater in adapter list by bus_id | |
784 | * @bus_id: bus_id to search for | |
785 | * Traverse list of all adapters and return pointer to an adapter | |
786 | * with the given bus_id. | |
787 | */ | |
788 | struct zfcp_adapter * | |
789 | zfcp_get_adapter_by_busid(char *bus_id) | |
790 | { | |
791 | struct zfcp_adapter *adapter; | |
792 | int found = 0; | |
793 | ||
794 | list_for_each_entry(adapter, &zfcp_data.adapter_list_head, list) { | |
795 | if ((strncmp(bus_id, zfcp_get_busid_by_adapter(adapter), | |
796 | BUS_ID_SIZE) == 0) && | |
797 | !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, | |
798 | &adapter->status)){ | |
799 | found = 1; | |
800 | break; | |
801 | } | |
802 | } | |
803 | return found ? adapter : NULL; | |
804 | } | |
805 | ||
806 | /** | |
807 | * zfcp_unit_enqueue - enqueue unit to unit list of a port. | |
808 | * @port: pointer to port where unit is added | |
809 | * @fcp_lun: FCP LUN of unit to be enqueued | |
810 | * Return: pointer to enqueued unit on success, NULL on error | |
811 | * Locks: config_sema must be held to serialize changes to the unit list | |
812 | * | |
813 | * Sets up some unit internal structures and creates sysfs entry. | |
814 | */ | |
815 | struct zfcp_unit * | |
816 | zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun) | |
817 | { | |
462b7859 | 818 | struct zfcp_unit *unit; |
1da177e4 LT |
819 | |
820 | /* | |
821 | * check that there is no unit with this FCP_LUN already in list | |
822 | * and enqueue it. | |
823 | * Note: Unlike for the adapter and the port, this is an error | |
824 | */ | |
825 | read_lock_irq(&zfcp_data.config_lock); | |
826 | unit = zfcp_get_unit_by_lun(port, fcp_lun); | |
827 | read_unlock_irq(&zfcp_data.config_lock); | |
828 | if (unit) | |
829 | return NULL; | |
830 | ||
ec4081c6 | 831 | unit = kzalloc(sizeof (struct zfcp_unit), GFP_KERNEL); |
1da177e4 LT |
832 | if (!unit) |
833 | return NULL; | |
1da177e4 LT |
834 | |
835 | /* initialise reference count stuff */ | |
836 | atomic_set(&unit->refcount, 0); | |
837 | init_waitqueue_head(&unit->remove_wq); | |
838 | ||
839 | unit->port = port; | |
840 | unit->fcp_lun = fcp_lun; | |
841 | ||
842 | /* setup for sysfs registration */ | |
843 | snprintf(unit->sysfs_device.bus_id, BUS_ID_SIZE, "0x%016llx", fcp_lun); | |
844 | unit->sysfs_device.parent = &port->sysfs_device; | |
845 | unit->sysfs_device.release = zfcp_sysfs_unit_release; | |
846 | dev_set_drvdata(&unit->sysfs_device, unit); | |
847 | ||
5f852be9 CS |
848 | init_waitqueue_head(&unit->scsi_scan_wq); |
849 | ||
1da177e4 LT |
850 | /* mark unit unusable as long as sysfs registration is not complete */ |
851 | atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); | |
852 | ||
853 | if (device_register(&unit->sysfs_device)) { | |
854 | kfree(unit); | |
855 | return NULL; | |
856 | } | |
857 | ||
858 | if (zfcp_sysfs_unit_create_files(&unit->sysfs_device)) { | |
859 | device_unregister(&unit->sysfs_device); | |
860 | return NULL; | |
861 | } | |
862 | ||
863 | zfcp_unit_get(unit); | |
462b7859 | 864 | unit->scsi_lun = scsilun_to_int((struct scsi_lun *)&unit->fcp_lun); |
1da177e4 | 865 | |
1da177e4 | 866 | write_lock_irq(&zfcp_data.config_lock); |
462b7859 | 867 | list_add_tail(&unit->list, &port->unit_list_head); |
1da177e4 LT |
868 | atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); |
869 | atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status); | |
870 | write_unlock_irq(&zfcp_data.config_lock); | |
871 | ||
872 | port->units++; | |
873 | zfcp_port_get(port); | |
874 | ||
875 | return unit; | |
876 | } | |
877 | ||
878 | void | |
879 | zfcp_unit_dequeue(struct zfcp_unit *unit) | |
880 | { | |
881 | zfcp_unit_wait(unit); | |
882 | write_lock_irq(&zfcp_data.config_lock); | |
883 | list_del(&unit->list); | |
884 | write_unlock_irq(&zfcp_data.config_lock); | |
885 | unit->port->units--; | |
886 | zfcp_port_put(unit->port); | |
887 | zfcp_sysfs_unit_remove_files(&unit->sysfs_device); | |
888 | device_unregister(&unit->sysfs_device); | |
889 | } | |
890 | ||
1da177e4 LT |
891 | /* |
892 | * Allocates a combined QTCB/fsf_req buffer for erp actions and fcp/SCSI | |
893 | * commands. | |
894 | * It also genrates fcp-nameserver request/response buffer and unsolicited | |
895 | * status read fsf_req buffers. | |
896 | * | |
897 | * locks: must only be called with zfcp_data.config_sema taken | |
898 | */ | |
899 | static int | |
900 | zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter) | |
901 | { | |
902 | adapter->pool.fsf_req_erp = | |
dd52e0ea HC |
903 | mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ERP_NR, |
904 | zfcp_data.fsf_req_qtcb_cache); | |
0eaae62a | 905 | if (!adapter->pool.fsf_req_erp) |
1da177e4 LT |
906 | return -ENOMEM; |
907 | ||
908 | adapter->pool.fsf_req_scsi = | |
dd52e0ea HC |
909 | mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_SCSI_NR, |
910 | zfcp_data.fsf_req_qtcb_cache); | |
0eaae62a | 911 | if (!adapter->pool.fsf_req_scsi) |
1da177e4 LT |
912 | return -ENOMEM; |
913 | ||
914 | adapter->pool.fsf_req_abort = | |
dd52e0ea HC |
915 | mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ABORT_NR, |
916 | zfcp_data.fsf_req_qtcb_cache); | |
0eaae62a | 917 | if (!adapter->pool.fsf_req_abort) |
1da177e4 LT |
918 | return -ENOMEM; |
919 | ||
920 | adapter->pool.fsf_req_status_read = | |
0eaae62a MD |
921 | mempool_create_kmalloc_pool(ZFCP_POOL_STATUS_READ_NR, |
922 | sizeof(struct zfcp_fsf_req)); | |
923 | if (!adapter->pool.fsf_req_status_read) | |
1da177e4 LT |
924 | return -ENOMEM; |
925 | ||
926 | adapter->pool.data_status_read = | |
dd52e0ea HC |
927 | mempool_create_slab_pool(ZFCP_POOL_STATUS_READ_NR, |
928 | zfcp_data.sr_buffer_cache); | |
0eaae62a | 929 | if (!adapter->pool.data_status_read) |
1da177e4 LT |
930 | return -ENOMEM; |
931 | ||
932 | adapter->pool.data_gid_pn = | |
dd52e0ea HC |
933 | mempool_create_slab_pool(ZFCP_POOL_DATA_GID_PN_NR, |
934 | zfcp_data.gid_pn_cache); | |
0eaae62a | 935 | if (!adapter->pool.data_gid_pn) |
1da177e4 LT |
936 | return -ENOMEM; |
937 | ||
938 | return 0; | |
939 | } | |
940 | ||
941 | /** | |
942 | * zfcp_free_low_mem_buffers - free memory pools of an adapter | |
943 | * @adapter: pointer to zfcp_adapter for which memory pools should be freed | |
944 | * locking: zfcp_data.config_sema must be held | |
945 | */ | |
946 | static void | |
947 | zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter) | |
948 | { | |
949 | if (adapter->pool.fsf_req_erp) | |
950 | mempool_destroy(adapter->pool.fsf_req_erp); | |
951 | if (adapter->pool.fsf_req_scsi) | |
952 | mempool_destroy(adapter->pool.fsf_req_scsi); | |
953 | if (adapter->pool.fsf_req_abort) | |
954 | mempool_destroy(adapter->pool.fsf_req_abort); | |
955 | if (adapter->pool.fsf_req_status_read) | |
956 | mempool_destroy(adapter->pool.fsf_req_status_read); | |
957 | if (adapter->pool.data_status_read) | |
958 | mempool_destroy(adapter->pool.data_status_read); | |
959 | if (adapter->pool.data_gid_pn) | |
960 | mempool_destroy(adapter->pool.data_gid_pn); | |
961 | } | |
962 | ||
763968e2 | 963 | static void zfcp_dummy_release(struct device *dev) |
1da177e4 LT |
964 | { |
965 | return; | |
966 | } | |
967 | ||
968 | /* | |
969 | * Enqueues an adapter at the end of the adapter list in the driver data. | |
970 | * All adapter internal structures are set up. | |
971 | * Proc-fs entries are also created. | |
972 | * | |
973 | * returns: 0 if a new adapter was successfully enqueued | |
974 | * ZFCP_KNOWN if an adapter with this devno was already present | |
975 | * -ENOMEM if alloc failed | |
976 | * locks: config_sema must be held to serialise changes to the adapter list | |
977 | */ | |
978 | struct zfcp_adapter * | |
979 | zfcp_adapter_enqueue(struct ccw_device *ccw_device) | |
980 | { | |
981 | int retval = 0; | |
982 | struct zfcp_adapter *adapter; | |
983 | ||
984 | /* | |
985 | * Note: It is safe to release the list_lock, as any list changes | |
986 | * are protected by the config_sema, which must be held to get here | |
987 | */ | |
988 | ||
989 | /* try to allocate new adapter data structure (zeroed) */ | |
ec4081c6 | 990 | adapter = kzalloc(sizeof (struct zfcp_adapter), GFP_KERNEL); |
1da177e4 LT |
991 | if (!adapter) { |
992 | ZFCP_LOG_INFO("error: allocation of base adapter " | |
993 | "structure failed\n"); | |
994 | goto out; | |
995 | } | |
1da177e4 LT |
996 | |
997 | ccw_device->handler = NULL; | |
998 | ||
999 | /* save ccw_device pointer */ | |
1000 | adapter->ccw_device = ccw_device; | |
1001 | ||
1002 | retval = zfcp_qdio_allocate_queues(adapter); | |
1003 | if (retval) | |
1004 | goto queues_alloc_failed; | |
1005 | ||
1006 | retval = zfcp_qdio_allocate(adapter); | |
1007 | if (retval) | |
1008 | goto qdio_allocate_failed; | |
1009 | ||
1010 | retval = zfcp_allocate_low_mem_buffers(adapter); | |
1011 | if (retval) { | |
1012 | ZFCP_LOG_INFO("error: pool allocation failed\n"); | |
1013 | goto failed_low_mem_buffers; | |
1014 | } | |
1015 | ||
1016 | /* initialise reference count stuff */ | |
1017 | atomic_set(&adapter->refcount, 0); | |
1018 | init_waitqueue_head(&adapter->remove_wq); | |
1019 | ||
1020 | /* initialise list of ports */ | |
1021 | INIT_LIST_HEAD(&adapter->port_list_head); | |
1022 | ||
1023 | /* initialise list of ports to be removed */ | |
1024 | INIT_LIST_HEAD(&adapter->port_remove_lh); | |
1025 | ||
1026 | /* initialize list of fsf requests */ | |
fea9d6c7 | 1027 | spin_lock_init(&adapter->req_list_lock); |
ca2d02c2 | 1028 | retval = zfcp_reqlist_alloc(adapter); |
fea9d6c7 VS |
1029 | if (retval) { |
1030 | ZFCP_LOG_INFO("request list initialization failed\n"); | |
1031 | goto failed_low_mem_buffers; | |
1032 | } | |
1da177e4 | 1033 | |
c48a29d0 HC |
1034 | /* initialize debug locks */ |
1035 | ||
1036 | spin_lock_init(&adapter->erp_dbf_lock); | |
1037 | spin_lock_init(&adapter->hba_dbf_lock); | |
1038 | spin_lock_init(&adapter->san_dbf_lock); | |
1039 | spin_lock_init(&adapter->scsi_dbf_lock); | |
1040 | ||
1041 | /* initialize error recovery stuff */ | |
1042 | ||
1043 | rwlock_init(&adapter->erp_lock); | |
1044 | sema_init(&adapter->erp_ready_sem, 0); | |
1045 | INIT_LIST_HEAD(&adapter->erp_ready_head); | |
1046 | INIT_LIST_HEAD(&adapter->erp_running_head); | |
1047 | ||
1da177e4 LT |
1048 | /* initialize abort lock */ |
1049 | rwlock_init(&adapter->abort_lock); | |
1050 | ||
1051 | /* initialise some erp stuff */ | |
1052 | init_waitqueue_head(&adapter->erp_thread_wqh); | |
1053 | init_waitqueue_head(&adapter->erp_done_wqh); | |
1054 | ||
1055 | /* initialize lock of associated request queue */ | |
1056 | rwlock_init(&adapter->request_queue.queue_lock); | |
1057 | ||
1da177e4 LT |
1058 | /* mark adapter unusable as long as sysfs registration is not complete */ |
1059 | atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); | |
1060 | ||
1061 | adapter->ccw_device = ccw_device; | |
1062 | dev_set_drvdata(&ccw_device->dev, adapter); | |
1063 | ||
1064 | if (zfcp_sysfs_adapter_create_files(&ccw_device->dev)) | |
1065 | goto sysfs_failed; | |
1066 | ||
1067 | adapter->generic_services.parent = &adapter->ccw_device->dev; | |
1068 | adapter->generic_services.release = zfcp_dummy_release; | |
1069 | snprintf(adapter->generic_services.bus_id, BUS_ID_SIZE, | |
1070 | "generic_services"); | |
1071 | ||
1072 | if (device_register(&adapter->generic_services)) | |
1073 | goto generic_services_failed; | |
1074 | ||
1075 | /* put allocated adapter at list tail */ | |
1076 | write_lock_irq(&zfcp_data.config_lock); | |
1077 | atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); | |
1078 | list_add_tail(&adapter->list, &zfcp_data.adapter_list_head); | |
1079 | write_unlock_irq(&zfcp_data.config_lock); | |
1080 | ||
1081 | zfcp_data.adapters++; | |
1082 | ||
1083 | goto out; | |
1084 | ||
1085 | generic_services_failed: | |
1086 | zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev); | |
1087 | sysfs_failed: | |
1088 | dev_set_drvdata(&ccw_device->dev, NULL); | |
ca2d02c2 | 1089 | zfcp_reqlist_free(adapter); |
1da177e4 LT |
1090 | failed_low_mem_buffers: |
1091 | zfcp_free_low_mem_buffers(adapter); | |
1092 | if (qdio_free(ccw_device) != 0) | |
1093 | ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n", | |
1094 | zfcp_get_busid_by_adapter(adapter)); | |
1095 | qdio_allocate_failed: | |
1096 | zfcp_qdio_free_queues(adapter); | |
1097 | queues_alloc_failed: | |
1098 | kfree(adapter); | |
1099 | adapter = NULL; | |
1100 | out: | |
1101 | return adapter; | |
1102 | } | |
1103 | ||
1104 | /* | |
1105 | * returns: 0 - struct zfcp_adapter data structure successfully removed | |
1106 | * !0 - struct zfcp_adapter data structure could not be removed | |
1107 | * (e.g. still used) | |
1108 | * locks: adapter list write lock is assumed to be held by caller | |
1da177e4 LT |
1109 | */ |
1110 | void | |
1111 | zfcp_adapter_dequeue(struct zfcp_adapter *adapter) | |
1112 | { | |
1113 | int retval = 0; | |
1114 | unsigned long flags; | |
1115 | ||
9f28745a | 1116 | zfcp_adapter_scsi_unregister(adapter); |
1da177e4 LT |
1117 | device_unregister(&adapter->generic_services); |
1118 | zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev); | |
1119 | dev_set_drvdata(&adapter->ccw_device->dev, NULL); | |
1120 | /* sanity check: no pending FSF requests */ | |
fea9d6c7 VS |
1121 | spin_lock_irqsave(&adapter->req_list_lock, flags); |
1122 | retval = zfcp_reqlist_isempty(adapter); | |
1123 | spin_unlock_irqrestore(&adapter->req_list_lock, flags); | |
1124 | if (!retval) { | |
1da177e4 LT |
1125 | ZFCP_LOG_NORMAL("bug: adapter %s (%p) still in use, " |
1126 | "%i requests outstanding\n", | |
1127 | zfcp_get_busid_by_adapter(adapter), adapter, | |
fea9d6c7 | 1128 | atomic_read(&adapter->reqs_active)); |
1da177e4 LT |
1129 | retval = -EBUSY; |
1130 | goto out; | |
1131 | } | |
1132 | ||
1133 | /* remove specified adapter data structure from list */ | |
1134 | write_lock_irq(&zfcp_data.config_lock); | |
1135 | list_del(&adapter->list); | |
1136 | write_unlock_irq(&zfcp_data.config_lock); | |
1137 | ||
1138 | /* decrease number of adapters in list */ | |
1139 | zfcp_data.adapters--; | |
1140 | ||
1141 | ZFCP_LOG_TRACE("adapter %s (%p) removed from list, " | |
1142 | "%i adapters still in list\n", | |
1143 | zfcp_get_busid_by_adapter(adapter), | |
1144 | adapter, zfcp_data.adapters); | |
1145 | ||
1146 | retval = qdio_free(adapter->ccw_device); | |
1147 | if (retval) | |
1148 | ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n", | |
1149 | zfcp_get_busid_by_adapter(adapter)); | |
1150 | ||
1151 | zfcp_free_low_mem_buffers(adapter); | |
1152 | /* free memory of adapter data structure and queues */ | |
1153 | zfcp_qdio_free_queues(adapter); | |
fea9d6c7 | 1154 | zfcp_reqlist_free(adapter); |
f6cd94b1 AH |
1155 | kfree(adapter->fc_stats); |
1156 | kfree(adapter->stats_reset_data); | |
1da177e4 LT |
1157 | ZFCP_LOG_TRACE("freeing adapter structure\n"); |
1158 | kfree(adapter); | |
1159 | out: | |
1160 | return; | |
1161 | } | |
1162 | ||
1163 | /** | |
1164 | * zfcp_port_enqueue - enqueue port to port list of adapter | |
1165 | * @adapter: adapter where remote port is added | |
1166 | * @wwpn: WWPN of the remote port to be enqueued | |
1167 | * @status: initial status for the port | |
1168 | * @d_id: destination id of the remote port to be enqueued | |
1169 | * Return: pointer to enqueued port on success, NULL on error | |
1170 | * Locks: config_sema must be held to serialize changes to the port list | |
1171 | * | |
1172 | * All port internal structures are set up and the sysfs entry is generated. | |
1173 | * d_id is used to enqueue ports with a well known address like the Directory | |
1174 | * Service for nameserver lookup. | |
1175 | */ | |
1176 | struct zfcp_port * | |
1177 | zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, u32 status, | |
1178 | u32 d_id) | |
1179 | { | |
3859f6a2 | 1180 | struct zfcp_port *port; |
1da177e4 | 1181 | int check_wwpn; |
1da177e4 LT |
1182 | |
1183 | check_wwpn = !(status & ZFCP_STATUS_PORT_NO_WWPN); | |
1da177e4 LT |
1184 | /* |
1185 | * check that there is no port with this WWPN already in list | |
1186 | */ | |
1187 | if (check_wwpn) { | |
1188 | read_lock_irq(&zfcp_data.config_lock); | |
1189 | port = zfcp_get_port_by_wwpn(adapter, wwpn); | |
1190 | read_unlock_irq(&zfcp_data.config_lock); | |
1191 | if (port) | |
1192 | return NULL; | |
1193 | } | |
1194 | ||
ec4081c6 | 1195 | port = kzalloc(sizeof (struct zfcp_port), GFP_KERNEL); |
1da177e4 LT |
1196 | if (!port) |
1197 | return NULL; | |
1da177e4 LT |
1198 | |
1199 | /* initialise reference count stuff */ | |
1200 | atomic_set(&port->refcount, 0); | |
1201 | init_waitqueue_head(&port->remove_wq); | |
1202 | ||
1203 | INIT_LIST_HEAD(&port->unit_list_head); | |
1204 | INIT_LIST_HEAD(&port->unit_remove_lh); | |
1205 | ||
1206 | port->adapter = adapter; | |
1207 | ||
1208 | if (check_wwpn) | |
1209 | port->wwpn = wwpn; | |
1210 | ||
1211 | atomic_set_mask(status, &port->status); | |
1212 | ||
1213 | /* setup for sysfs registration */ | |
1214 | if (status & ZFCP_STATUS_PORT_WKA) { | |
1215 | switch (d_id) { | |
1216 | case ZFCP_DID_DIRECTORY_SERVICE: | |
1217 | snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, | |
1218 | "directory"); | |
1219 | break; | |
1220 | case ZFCP_DID_MANAGEMENT_SERVICE: | |
1221 | snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, | |
1222 | "management"); | |
1223 | break; | |
1224 | case ZFCP_DID_KEY_DISTRIBUTION_SERVICE: | |
1225 | snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, | |
1226 | "key_distribution"); | |
1227 | break; | |
1228 | case ZFCP_DID_ALIAS_SERVICE: | |
1229 | snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, | |
1230 | "alias"); | |
1231 | break; | |
1232 | case ZFCP_DID_TIME_SERVICE: | |
1233 | snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, | |
1234 | "time"); | |
1235 | break; | |
1236 | default: | |
1237 | kfree(port); | |
1238 | return NULL; | |
1239 | } | |
1240 | port->d_id = d_id; | |
1241 | port->sysfs_device.parent = &adapter->generic_services; | |
1242 | } else { | |
1243 | snprintf(port->sysfs_device.bus_id, | |
1244 | BUS_ID_SIZE, "0x%016llx", wwpn); | |
3859f6a2 | 1245 | port->sysfs_device.parent = &adapter->ccw_device->dev; |
1da177e4 LT |
1246 | } |
1247 | port->sysfs_device.release = zfcp_sysfs_port_release; | |
1248 | dev_set_drvdata(&port->sysfs_device, port); | |
1249 | ||
1250 | /* mark port unusable as long as sysfs registration is not complete */ | |
1251 | atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); | |
1252 | ||
1253 | if (device_register(&port->sysfs_device)) { | |
1254 | kfree(port); | |
1255 | return NULL; | |
1256 | } | |
1257 | ||
1258 | if (zfcp_sysfs_port_create_files(&port->sysfs_device, status)) { | |
1259 | device_unregister(&port->sysfs_device); | |
1260 | return NULL; | |
1261 | } | |
1262 | ||
1263 | zfcp_port_get(port); | |
1264 | ||
1da177e4 | 1265 | write_lock_irq(&zfcp_data.config_lock); |
3859f6a2 | 1266 | list_add_tail(&port->list, &adapter->port_list_head); |
1da177e4 LT |
1267 | atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); |
1268 | atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &port->status); | |
1269 | if (d_id == ZFCP_DID_DIRECTORY_SERVICE) | |
1270 | if (!adapter->nameserver_port) | |
1271 | adapter->nameserver_port = port; | |
1272 | adapter->ports++; | |
1273 | write_unlock_irq(&zfcp_data.config_lock); | |
1274 | ||
1275 | zfcp_adapter_get(adapter); | |
1276 | ||
1277 | return port; | |
1278 | } | |
1279 | ||
1280 | void | |
1281 | zfcp_port_dequeue(struct zfcp_port *port) | |
1282 | { | |
1283 | zfcp_port_wait(port); | |
1284 | write_lock_irq(&zfcp_data.config_lock); | |
1285 | list_del(&port->list); | |
1286 | port->adapter->ports--; | |
1287 | write_unlock_irq(&zfcp_data.config_lock); | |
3859f6a2 | 1288 | if (port->rport) |
20b1730a HC |
1289 | fc_remote_port_delete(port->rport); |
1290 | port->rport = NULL; | |
1da177e4 LT |
1291 | zfcp_adapter_put(port->adapter); |
1292 | zfcp_sysfs_port_remove_files(&port->sysfs_device, | |
1293 | atomic_read(&port->status)); | |
1294 | device_unregister(&port->sysfs_device); | |
1295 | } | |
1296 | ||
1297 | /* Enqueues a nameserver port */ | |
1298 | int | |
1299 | zfcp_nameserver_enqueue(struct zfcp_adapter *adapter) | |
1300 | { | |
1301 | struct zfcp_port *port; | |
1302 | ||
1303 | port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA, | |
1304 | ZFCP_DID_DIRECTORY_SERVICE); | |
1305 | if (!port) { | |
1306 | ZFCP_LOG_INFO("error: enqueue of nameserver port for " | |
1307 | "adapter %s failed\n", | |
1308 | zfcp_get_busid_by_adapter(adapter)); | |
1309 | return -ENXIO; | |
1310 | } | |
1311 | zfcp_port_put(port); | |
1312 | ||
1313 | return 0; | |
1314 | } | |
1315 | ||
1316 | #undef ZFCP_LOG_AREA | |
1317 | ||
1318 | /****************************************************************/ | |
1319 | /******* Fibre Channel Standard related Functions **************/ | |
1320 | /****************************************************************/ | |
1321 | ||
1322 | #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FC | |
1323 | ||
763968e2 | 1324 | static void |
1da177e4 LT |
1325 | zfcp_fsf_incoming_els_rscn(struct zfcp_adapter *adapter, |
1326 | struct fsf_status_read_buffer *status_buffer) | |
1327 | { | |
1328 | struct fcp_rscn_head *fcp_rscn_head; | |
1329 | struct fcp_rscn_element *fcp_rscn_element; | |
1330 | struct zfcp_port *port; | |
1331 | u16 i; | |
1332 | u16 no_entries; | |
1333 | u32 range_mask; | |
1334 | unsigned long flags; | |
1335 | ||
1336 | fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload; | |
1337 | fcp_rscn_element = (struct fcp_rscn_element *) status_buffer->payload; | |
1338 | ||
1339 | /* see FC-FS */ | |
1340 | no_entries = (fcp_rscn_head->payload_len / 4); | |
1341 | ||
1da177e4 LT |
1342 | for (i = 1; i < no_entries; i++) { |
1343 | /* skip head and start with 1st element */ | |
1344 | fcp_rscn_element++; | |
1345 | switch (fcp_rscn_element->addr_format) { | |
1346 | case ZFCP_PORT_ADDRESS: | |
1da177e4 LT |
1347 | range_mask = ZFCP_PORTS_RANGE_PORT; |
1348 | break; | |
1349 | case ZFCP_AREA_ADDRESS: | |
1da177e4 LT |
1350 | range_mask = ZFCP_PORTS_RANGE_AREA; |
1351 | break; | |
1352 | case ZFCP_DOMAIN_ADDRESS: | |
1da177e4 LT |
1353 | range_mask = ZFCP_PORTS_RANGE_DOMAIN; |
1354 | break; | |
1355 | case ZFCP_FABRIC_ADDRESS: | |
1da177e4 LT |
1356 | range_mask = ZFCP_PORTS_RANGE_FABRIC; |
1357 | break; | |
1358 | default: | |
1359 | ZFCP_LOG_INFO("incoming RSCN with unknown " | |
1360 | "address format\n"); | |
1361 | continue; | |
1362 | } | |
1363 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
1364 | list_for_each_entry(port, &adapter->port_list_head, list) { | |
1365 | if (atomic_test_mask | |
1366 | (ZFCP_STATUS_PORT_WKA, &port->status)) | |
1367 | continue; | |
1368 | /* Do we know this port? If not skip it. */ | |
1369 | if (!atomic_test_mask | |
1370 | (ZFCP_STATUS_PORT_DID_DID, &port->status)) { | |
1371 | ZFCP_LOG_INFO("incoming RSCN, trying to open " | |
1372 | "port 0x%016Lx\n", port->wwpn); | |
1da177e4 LT |
1373 | zfcp_erp_port_reopen(port, |
1374 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
1375 | continue; | |
1376 | } | |
1377 | ||
1378 | /* | |
1379 | * FIXME: race: d_id might being invalidated | |
1380 | * (...DID_DID reset) | |
1381 | */ | |
1382 | if ((port->d_id & range_mask) | |
1383 | == (fcp_rscn_element->nport_did & range_mask)) { | |
1384 | ZFCP_LOG_TRACE("reopen did 0x%08x\n", | |
1385 | fcp_rscn_element->nport_did); | |
1386 | /* | |
1387 | * Unfortunately, an RSCN does not specify the | |
1388 | * type of change a target underwent. We assume | |
1389 | * that it makes sense to reopen the link. | |
1390 | * FIXME: Shall we try to find out more about | |
1391 | * the target and link state before closing it? | |
1392 | * How to accomplish this? (nameserver?) | |
1393 | * Where would such code be put in? | |
1394 | * (inside or outside erp) | |
1395 | */ | |
1396 | ZFCP_LOG_INFO("incoming RSCN, trying to open " | |
1397 | "port 0x%016Lx\n", port->wwpn); | |
1da177e4 LT |
1398 | zfcp_test_link(port); |
1399 | } | |
1400 | } | |
1401 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
1402 | } | |
1403 | } | |
1404 | ||
1405 | static void | |
1406 | zfcp_fsf_incoming_els_plogi(struct zfcp_adapter *adapter, | |
1407 | struct fsf_status_read_buffer *status_buffer) | |
1408 | { | |
06506d00 | 1409 | struct fsf_plogi *els_plogi; |
1da177e4 LT |
1410 | struct zfcp_port *port; |
1411 | unsigned long flags; | |
1412 | ||
06506d00 | 1413 | els_plogi = (struct fsf_plogi *) status_buffer->payload; |
1da177e4 LT |
1414 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
1415 | list_for_each_entry(port, &adapter->port_list_head, list) { | |
06506d00 | 1416 | if (port->wwpn == (*(wwn_t *) &els_plogi->serv_param.wwpn)) |
1da177e4 LT |
1417 | break; |
1418 | } | |
1419 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
1420 | ||
06506d00 | 1421 | if (!port || (port->wwpn != (*(wwn_t *) &els_plogi->serv_param.wwpn))) { |
1da177e4 | 1422 | ZFCP_LOG_DEBUG("ignored incoming PLOGI for nonexisting port " |
1d589edf | 1423 | "with d_id 0x%06x on adapter %s\n", |
1da177e4 LT |
1424 | status_buffer->d_id, |
1425 | zfcp_get_busid_by_adapter(adapter)); | |
1426 | } else { | |
1da177e4 LT |
1427 | zfcp_erp_port_forced_reopen(port, 0); |
1428 | } | |
1429 | } | |
1430 | ||
1431 | static void | |
1432 | zfcp_fsf_incoming_els_logo(struct zfcp_adapter *adapter, | |
1433 | struct fsf_status_read_buffer *status_buffer) | |
1434 | { | |
1435 | struct fcp_logo *els_logo = (struct fcp_logo *) status_buffer->payload; | |
1436 | struct zfcp_port *port; | |
1437 | unsigned long flags; | |
1438 | ||
1da177e4 LT |
1439 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
1440 | list_for_each_entry(port, &adapter->port_list_head, list) { | |
1441 | if (port->wwpn == els_logo->nport_wwpn) | |
1442 | break; | |
1443 | } | |
1444 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
1445 | ||
1446 | if (!port || (port->wwpn != els_logo->nport_wwpn)) { | |
1447 | ZFCP_LOG_DEBUG("ignored incoming LOGO for nonexisting port " | |
1d589edf | 1448 | "with d_id 0x%06x on adapter %s\n", |
1da177e4 LT |
1449 | status_buffer->d_id, |
1450 | zfcp_get_busid_by_adapter(adapter)); | |
1451 | } else { | |
1da177e4 LT |
1452 | zfcp_erp_port_forced_reopen(port, 0); |
1453 | } | |
1454 | } | |
1455 | ||
1456 | static void | |
1457 | zfcp_fsf_incoming_els_unknown(struct zfcp_adapter *adapter, | |
1458 | struct fsf_status_read_buffer *status_buffer) | |
1459 | { | |
1da177e4 LT |
1460 | ZFCP_LOG_NORMAL("warning: unknown incoming ELS 0x%08x " |
1461 | "for adapter %s\n", *(u32 *) (status_buffer->payload), | |
1462 | zfcp_get_busid_by_adapter(adapter)); | |
1463 | ||
1464 | } | |
1465 | ||
1466 | void | |
1467 | zfcp_fsf_incoming_els(struct zfcp_fsf_req *fsf_req) | |
1468 | { | |
1469 | struct fsf_status_read_buffer *status_buffer; | |
1470 | u32 els_type; | |
1471 | struct zfcp_adapter *adapter; | |
1472 | ||
059c97d0 | 1473 | status_buffer = (struct fsf_status_read_buffer *) fsf_req->data; |
1da177e4 LT |
1474 | els_type = *(u32 *) (status_buffer->payload); |
1475 | adapter = fsf_req->adapter; | |
1476 | ||
8a36e453 | 1477 | zfcp_san_dbf_event_incoming_els(fsf_req); |
1da177e4 LT |
1478 | if (els_type == LS_PLOGI) |
1479 | zfcp_fsf_incoming_els_plogi(adapter, status_buffer); | |
1480 | else if (els_type == LS_LOGO) | |
1481 | zfcp_fsf_incoming_els_logo(adapter, status_buffer); | |
1482 | else if ((els_type & 0xffff0000) == LS_RSCN) | |
1483 | /* we are only concerned with the command, not the length */ | |
1484 | zfcp_fsf_incoming_els_rscn(adapter, status_buffer); | |
1485 | else | |
1486 | zfcp_fsf_incoming_els_unknown(adapter, status_buffer); | |
1487 | } | |
1488 | ||
1489 | ||
1490 | /** | |
1491 | * zfcp_gid_pn_buffers_alloc - allocate buffers for GID_PN nameserver request | |
1492 | * @gid_pn: pointer to return pointer to struct zfcp_gid_pn_data | |
1493 | * @pool: pointer to mempool_t if non-null memory pool is used for allocation | |
1494 | */ | |
1495 | static int | |
1496 | zfcp_gid_pn_buffers_alloc(struct zfcp_gid_pn_data **gid_pn, mempool_t *pool) | |
1497 | { | |
1498 | struct zfcp_gid_pn_data *data; | |
1499 | ||
1500 | if (pool != NULL) { | |
1501 | data = mempool_alloc(pool, GFP_ATOMIC); | |
1502 | if (likely(data != NULL)) { | |
1503 | data->ct.pool = pool; | |
1504 | } | |
1505 | } else { | |
47b87b79 | 1506 | data = kmem_cache_alloc(zfcp_data.gid_pn_cache, GFP_ATOMIC); |
1da177e4 LT |
1507 | } |
1508 | ||
1509 | if (NULL == data) | |
1510 | return -ENOMEM; | |
1511 | ||
1512 | memset(data, 0, sizeof(*data)); | |
1513 | data->ct.req = &data->req; | |
1514 | data->ct.resp = &data->resp; | |
1515 | data->ct.req_count = data->ct.resp_count = 1; | |
1516 | zfcp_address_to_sg(&data->ct_iu_req, &data->req); | |
1517 | zfcp_address_to_sg(&data->ct_iu_resp, &data->resp); | |
1518 | data->req.length = sizeof(struct ct_iu_gid_pn_req); | |
1519 | data->resp.length = sizeof(struct ct_iu_gid_pn_resp); | |
1520 | ||
1521 | *gid_pn = data; | |
1522 | return 0; | |
1523 | } | |
1524 | ||
1525 | /** | |
1526 | * zfcp_gid_pn_buffers_free - free buffers for GID_PN nameserver request | |
1527 | * @gid_pn: pointer to struct zfcp_gid_pn_data which has to be freed | |
1528 | */ | |
aa551daf | 1529 | static void zfcp_gid_pn_buffers_free(struct zfcp_gid_pn_data *gid_pn) |
1da177e4 | 1530 | { |
aa551daf | 1531 | if (gid_pn->ct.pool) |
1da177e4 LT |
1532 | mempool_free(gid_pn, gid_pn->ct.pool); |
1533 | else | |
47b87b79 | 1534 | kmem_cache_free(zfcp_data.gid_pn_cache, gid_pn); |
1da177e4 LT |
1535 | } |
1536 | ||
1537 | /** | |
1538 | * zfcp_ns_gid_pn_request - initiate GID_PN nameserver request | |
1539 | * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed | |
1540 | */ | |
1541 | int | |
1542 | zfcp_ns_gid_pn_request(struct zfcp_erp_action *erp_action) | |
1543 | { | |
1544 | int ret; | |
1545 | struct ct_iu_gid_pn_req *ct_iu_req; | |
1546 | struct zfcp_gid_pn_data *gid_pn; | |
1547 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1548 | ||
1549 | ret = zfcp_gid_pn_buffers_alloc(&gid_pn, adapter->pool.data_gid_pn); | |
1550 | if (ret < 0) { | |
1551 | ZFCP_LOG_INFO("error: buffer allocation for gid_pn nameserver " | |
1552 | "request failed for adapter %s\n", | |
1553 | zfcp_get_busid_by_adapter(adapter)); | |
1554 | goto out; | |
1555 | } | |
1556 | ||
1557 | /* setup nameserver request */ | |
1558 | ct_iu_req = zfcp_sg_to_address(gid_pn->ct.req); | |
1559 | ct_iu_req->header.revision = ZFCP_CT_REVISION; | |
1560 | ct_iu_req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; | |
1561 | ct_iu_req->header.gs_subtype = ZFCP_CT_NAME_SERVER; | |
1562 | ct_iu_req->header.options = ZFCP_CT_SYNCHRONOUS; | |
1563 | ct_iu_req->header.cmd_rsp_code = ZFCP_CT_GID_PN; | |
1564 | ct_iu_req->header.max_res_size = ZFCP_CT_MAX_SIZE; | |
1565 | ct_iu_req->wwpn = erp_action->port->wwpn; | |
1566 | ||
1567 | /* setup parameters for send generic command */ | |
1568 | gid_pn->ct.port = adapter->nameserver_port; | |
1569 | gid_pn->ct.handler = zfcp_ns_gid_pn_handler; | |
1570 | gid_pn->ct.handler_data = (unsigned long) gid_pn; | |
1571 | gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT; | |
1da177e4 LT |
1572 | gid_pn->port = erp_action->port; |
1573 | ||
1574 | ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp, | |
1575 | erp_action); | |
1576 | if (ret) { | |
1577 | ZFCP_LOG_INFO("error: initiation of gid_pn nameserver request " | |
1578 | "failed for adapter %s\n", | |
1579 | zfcp_get_busid_by_adapter(adapter)); | |
1580 | ||
1581 | zfcp_gid_pn_buffers_free(gid_pn); | |
1582 | } | |
1583 | ||
1584 | out: | |
1585 | return ret; | |
1586 | } | |
1587 | ||
1588 | /** | |
1589 | * zfcp_ns_gid_pn_handler - handler for GID_PN nameserver request | |
1590 | * @data: unsigned long, contains pointer to struct zfcp_gid_pn_data | |
1591 | */ | |
1592 | static void zfcp_ns_gid_pn_handler(unsigned long data) | |
1593 | { | |
1594 | struct zfcp_port *port; | |
1595 | struct zfcp_send_ct *ct; | |
1596 | struct ct_iu_gid_pn_req *ct_iu_req; | |
1597 | struct ct_iu_gid_pn_resp *ct_iu_resp; | |
1598 | struct zfcp_gid_pn_data *gid_pn; | |
1599 | ||
1600 | ||
1601 | gid_pn = (struct zfcp_gid_pn_data *) data; | |
1602 | port = gid_pn->port; | |
1603 | ct = &gid_pn->ct; | |
1604 | ct_iu_req = zfcp_sg_to_address(ct->req); | |
1605 | ct_iu_resp = zfcp_sg_to_address(ct->resp); | |
1606 | ||
66c8684a AH |
1607 | if (ct->status != 0) |
1608 | goto failed; | |
1609 | ||
1610 | if (zfcp_check_ct_response(&ct_iu_resp->header)) { | |
1da177e4 LT |
1611 | /* FIXME: do we need some specific erp entry points */ |
1612 | atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status); | |
1613 | goto failed; | |
1614 | } | |
1615 | /* paranoia */ | |
1616 | if (ct_iu_req->wwpn != port->wwpn) { | |
1617 | ZFCP_LOG_NORMAL("bug: wwpn 0x%016Lx returned by nameserver " | |
1618 | "lookup does not match expected wwpn 0x%016Lx " | |
1619 | "for adapter %s\n", ct_iu_req->wwpn, port->wwpn, | |
1620 | zfcp_get_busid_by_port(port)); | |
1621 | goto mismatch; | |
1622 | } | |
1623 | ||
1624 | /* looks like a valid d_id */ | |
1625 | port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK; | |
1626 | atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); | |
1d589edf | 1627 | ZFCP_LOG_DEBUG("adapter %s: wwpn=0x%016Lx ---> d_id=0x%06x\n", |
1da177e4 LT |
1628 | zfcp_get_busid_by_port(port), port->wwpn, port->d_id); |
1629 | goto out; | |
1630 | ||
1631 | mismatch: | |
1632 | ZFCP_LOG_DEBUG("CT IUs do not match:\n"); | |
1633 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_req, | |
1634 | sizeof(struct ct_iu_gid_pn_req)); | |
1635 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_resp, | |
1636 | sizeof(struct ct_iu_gid_pn_resp)); | |
1637 | ||
1638 | failed: | |
1639 | ZFCP_LOG_NORMAL("warning: failed gid_pn nameserver request for wwpn " | |
1640 | "0x%016Lx for adapter %s\n", | |
1641 | port->wwpn, zfcp_get_busid_by_port(port)); | |
1642 | out: | |
1643 | zfcp_gid_pn_buffers_free(gid_pn); | |
1644 | return; | |
1645 | } | |
1646 | ||
1647 | /* reject CT_IU reason codes acc. to FC-GS-4 */ | |
1648 | static const struct zfcp_rc_entry zfcp_ct_rc[] = { | |
1649 | {0x01, "invalid command code"}, | |
1650 | {0x02, "invalid version level"}, | |
1651 | {0x03, "logical error"}, | |
1652 | {0x04, "invalid CT_IU size"}, | |
1653 | {0x05, "logical busy"}, | |
1654 | {0x07, "protocol error"}, | |
1655 | {0x09, "unable to perform command request"}, | |
1656 | {0x0b, "command not supported"}, | |
1657 | {0x0d, "server not available"}, | |
1658 | {0x0e, "session could not be established"}, | |
1659 | {0xff, "vendor specific error"}, | |
1660 | {0, NULL}, | |
1661 | }; | |
1662 | ||
1663 | /* LS_RJT reason codes acc. to FC-FS */ | |
1664 | static const struct zfcp_rc_entry zfcp_ls_rjt_rc[] = { | |
1665 | {0x01, "invalid LS_Command code"}, | |
1666 | {0x03, "logical error"}, | |
1667 | {0x05, "logical busy"}, | |
1668 | {0x07, "protocol error"}, | |
1669 | {0x09, "unable to perform command request"}, | |
1670 | {0x0b, "command not supported"}, | |
1671 | {0x0e, "command already in progress"}, | |
1672 | {0xff, "vendor specific error"}, | |
1673 | {0, NULL}, | |
1674 | }; | |
1675 | ||
1676 | /* reject reason codes according to FC-PH/FC-FS */ | |
1677 | static const struct zfcp_rc_entry zfcp_p_rjt_rc[] = { | |
1678 | {0x01, "invalid D_ID"}, | |
1679 | {0x02, "invalid S_ID"}, | |
1680 | {0x03, "Nx_Port not available, temporary"}, | |
1681 | {0x04, "Nx_Port not available, permament"}, | |
1682 | {0x05, "class not supported"}, | |
1683 | {0x06, "delimiter usage error"}, | |
1684 | {0x07, "TYPE not supported"}, | |
1685 | {0x08, "invalid Link_Control"}, | |
1686 | {0x09, "invalid R_CTL field"}, | |
1687 | {0x0a, "invalid F_CTL field"}, | |
1688 | {0x0b, "invalid OX_ID"}, | |
1689 | {0x0c, "invalid RX_ID"}, | |
1690 | {0x0d, "invalid SEQ_ID"}, | |
1691 | {0x0e, "invalid DF_CTL"}, | |
1692 | {0x0f, "invalid SEQ_CNT"}, | |
1693 | {0x10, "invalid parameter field"}, | |
1694 | {0x11, "exchange error"}, | |
1695 | {0x12, "protocol error"}, | |
1696 | {0x13, "incorrect length"}, | |
1697 | {0x14, "unsupported ACK"}, | |
1698 | {0x15, "class of service not supported by entity at FFFFFE"}, | |
1699 | {0x16, "login required"}, | |
1700 | {0x17, "excessive sequences attempted"}, | |
1701 | {0x18, "unable to establish exchange"}, | |
1702 | {0x1a, "fabric path not available"}, | |
1703 | {0x1b, "invalid VC_ID (class 4)"}, | |
1704 | {0x1c, "invalid CS_CTL field"}, | |
1705 | {0x1d, "insufficient resources for VC (class 4)"}, | |
1706 | {0x1f, "invalid class of service"}, | |
1707 | {0x20, "preemption request rejected"}, | |
1708 | {0x21, "preemption not enabled"}, | |
1709 | {0x22, "multicast error"}, | |
1710 | {0x23, "multicast error terminate"}, | |
1711 | {0x24, "process login required"}, | |
1712 | {0xff, "vendor specific reject"}, | |
1713 | {0, NULL}, | |
1714 | }; | |
1715 | ||
1716 | /** | |
1717 | * zfcp_rc_description - return description for given reaon code | |
1718 | * @code: reason code | |
1719 | * @rc_table: table of reason codes and descriptions | |
1720 | */ | |
4d284cac | 1721 | static const char * |
1da177e4 LT |
1722 | zfcp_rc_description(u8 code, const struct zfcp_rc_entry *rc_table) |
1723 | { | |
1724 | const char *descr = "unknown reason code"; | |
1725 | ||
1726 | do { | |
1727 | if (code == rc_table->code) { | |
1728 | descr = rc_table->description; | |
1729 | break; | |
1730 | } | |
1731 | rc_table++; | |
1732 | } while (rc_table->code && rc_table->description); | |
1733 | ||
1734 | return descr; | |
1735 | } | |
1736 | ||
1737 | /** | |
1738 | * zfcp_check_ct_response - evaluate reason code for CT_IU | |
1739 | * @rjt: response payload to an CT_IU request | |
1740 | * Return: 0 for accept CT_IU, 1 for reject CT_IU or invlid response code | |
1741 | */ | |
1742 | int | |
1743 | zfcp_check_ct_response(struct ct_hdr *rjt) | |
1744 | { | |
1745 | if (rjt->cmd_rsp_code == ZFCP_CT_ACCEPT) | |
1746 | return 0; | |
1747 | ||
1748 | if (rjt->cmd_rsp_code != ZFCP_CT_REJECT) { | |
1749 | ZFCP_LOG_NORMAL("error: invalid Generic Service command/" | |
1750 | "response code (0x%04hx)\n", | |
1751 | rjt->cmd_rsp_code); | |
1752 | return 1; | |
1753 | } | |
1754 | ||
1755 | ZFCP_LOG_INFO("Generic Service command rejected\n"); | |
1756 | ZFCP_LOG_INFO("%s (0x%02x, 0x%02x, 0x%02x)\n", | |
1757 | zfcp_rc_description(rjt->reason_code, zfcp_ct_rc), | |
1758 | (u32) rjt->reason_code, (u32) rjt->reason_code_expl, | |
1759 | (u32) rjt->vendor_unique); | |
1760 | ||
1761 | return 1; | |
1762 | } | |
1763 | ||
1764 | /** | |
1765 | * zfcp_print_els_rjt - print reject parameter and description for ELS reject | |
1766 | * @rjt_par: reject parameter acc. to FC-PH/FC-FS | |
1767 | * @rc_table: table of reason codes and descriptions | |
1768 | */ | |
4d284cac | 1769 | static void |
1da177e4 LT |
1770 | zfcp_print_els_rjt(struct zfcp_ls_rjt_par *rjt_par, |
1771 | const struct zfcp_rc_entry *rc_table) | |
1772 | { | |
1773 | ZFCP_LOG_INFO("%s (%02x %02x %02x %02x)\n", | |
1774 | zfcp_rc_description(rjt_par->reason_code, rc_table), | |
1775 | (u32) rjt_par->action, (u32) rjt_par->reason_code, | |
1776 | (u32) rjt_par->reason_expl, (u32) rjt_par->vendor_unique); | |
1777 | } | |
1778 | ||
1779 | /** | |
1780 | * zfcp_fsf_handle_els_rjt - evaluate status qualifier/reason code on ELS reject | |
1781 | * @sq: status qualifier word | |
1782 | * @rjt_par: reject parameter as described in FC-PH and FC-FS | |
1783 | * Return: -EROMTEIO for LS_RJT, -EREMCHG for invalid D_ID, -EIO else | |
1784 | */ | |
1785 | int | |
1786 | zfcp_handle_els_rjt(u32 sq, struct zfcp_ls_rjt_par *rjt_par) | |
1787 | { | |
1788 | int ret = -EIO; | |
1789 | ||
1790 | if (sq == FSF_IOSTAT_NPORT_RJT) { | |
1791 | ZFCP_LOG_INFO("ELS rejected (P_RJT)\n"); | |
1792 | zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc); | |
1793 | /* invalid d_id */ | |
1794 | if (rjt_par->reason_code == 0x01) | |
1795 | ret = -EREMCHG; | |
1796 | } else if (sq == FSF_IOSTAT_FABRIC_RJT) { | |
1797 | ZFCP_LOG_INFO("ELS rejected (F_RJT)\n"); | |
1798 | zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc); | |
1799 | /* invalid d_id */ | |
1800 | if (rjt_par->reason_code == 0x01) | |
1801 | ret = -EREMCHG; | |
1802 | } else if (sq == FSF_IOSTAT_LS_RJT) { | |
1803 | ZFCP_LOG_INFO("ELS rejected (LS_RJT)\n"); | |
1804 | zfcp_print_els_rjt(rjt_par, zfcp_ls_rjt_rc); | |
1805 | ret = -EREMOTEIO; | |
1806 | } else | |
1807 | ZFCP_LOG_INFO("unexpected SQ: 0x%02x\n", sq); | |
1808 | ||
1809 | return ret; | |
1810 | } | |
1811 | ||
75bfc283 RW |
1812 | /** |
1813 | * zfcp_plogi_evaluate - evaluate PLOGI playload and copy important fields | |
1814 | * into zfcp_port structure | |
1815 | * @port: zfcp_port structure | |
1816 | * @plogi: plogi payload | |
1817 | */ | |
1818 | void | |
1819 | zfcp_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi) | |
1820 | { | |
1821 | port->maxframe_size = plogi->serv_param.common_serv_param[7] | | |
1822 | ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8); | |
1823 | if (plogi->serv_param.class1_serv_param[0] & 0x80) | |
1824 | port->supported_classes |= FC_COS_CLASS1; | |
1825 | if (plogi->serv_param.class2_serv_param[0] & 0x80) | |
1826 | port->supported_classes |= FC_COS_CLASS2; | |
1827 | if (plogi->serv_param.class3_serv_param[0] & 0x80) | |
1828 | port->supported_classes |= FC_COS_CLASS3; | |
1829 | if (plogi->serv_param.class4_serv_param[0] & 0x80) | |
1830 | port->supported_classes |= FC_COS_CLASS4; | |
1831 | } | |
1832 | ||
1da177e4 | 1833 | #undef ZFCP_LOG_AREA |