Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * | |
3 | * linux/drivers/s390/scsi/zfcp_aux.c | |
4 | * | |
5 | * FCP adapter driver for IBM eServer zSeries | |
6 | * | |
7 | * (C) Copyright IBM Corp. 2002, 2004 | |
8 | * | |
9 | * Author(s): Martin Peschke <mpeschke@de.ibm.com> | |
10 | * Raimund Schroeder <raimund.schroeder@de.ibm.com> | |
11 | * Aron Zeh | |
12 | * Wolfgang Taphorn | |
13 | * Stefan Bader <stefan.bader@de.ibm.com> | |
14 | * Heiko Carstens <heiko.carstens@de.ibm.com> | |
15 | * Andreas Herrmann <aherrman@de.ibm.com> | |
16 | * | |
17 | * This program is free software; you can redistribute it and/or modify | |
18 | * it under the terms of the GNU General Public License as published by | |
19 | * the Free Software Foundation; either version 2, or (at your option) | |
20 | * any later version. | |
21 | * | |
22 | * This program is distributed in the hope that it will be useful, | |
23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
25 | * GNU General Public License for more details. | |
26 | * | |
27 | * You should have received a copy of the GNU General Public License | |
28 | * along with this program; if not, write to the Free Software | |
29 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
30 | */ | |
31 | ||
32 | #define ZFCP_AUX_REVISION "$Revision: 1.145 $" | |
33 | ||
34 | #include "zfcp_ext.h" | |
35 | ||
36 | /* accumulated log level (module parameter) */ | |
37 | static u32 loglevel = ZFCP_LOG_LEVEL_DEFAULTS; | |
38 | static char *device; | |
39 | /*********************** FUNCTION PROTOTYPES *********************************/ | |
40 | ||
41 | /* written against the module interface */ | |
42 | static int __init zfcp_module_init(void); | |
43 | ||
44 | /* FCP related */ | |
45 | static void zfcp_ns_gid_pn_handler(unsigned long); | |
46 | ||
47 | /* miscellaneous */ | |
48 | static inline int zfcp_sg_list_alloc(struct zfcp_sg_list *, size_t); | |
49 | static inline void zfcp_sg_list_free(struct zfcp_sg_list *); | |
50 | static inline int zfcp_sg_list_copy_from_user(struct zfcp_sg_list *, | |
51 | void __user *, size_t); | |
52 | static inline int zfcp_sg_list_copy_to_user(void __user *, | |
53 | struct zfcp_sg_list *, size_t); | |
54 | ||
e183b06b | 55 | static int zfcp_cfdc_dev_ioctl(struct file *, unsigned int, unsigned long); |
1da177e4 LT |
56 | |
57 | #define ZFCP_CFDC_IOC_MAGIC 0xDD | |
58 | #define ZFCP_CFDC_IOC \ | |
59 | _IOWR(ZFCP_CFDC_IOC_MAGIC, 0, struct zfcp_cfdc_sense_data) | |
60 | ||
1da177e4 LT |
61 | |
62 | static struct file_operations zfcp_cfdc_fops = { | |
e183b06b | 63 | .unlocked_ioctl = zfcp_cfdc_dev_ioctl, |
64 | #ifdef CONFIG_COMPAT | |
65 | .compat_ioctl = zfcp_cfdc_dev_ioctl | |
66 | #endif | |
1da177e4 LT |
67 | }; |
68 | ||
69 | static struct miscdevice zfcp_cfdc_misc = { | |
70 | .minor = ZFCP_CFDC_DEV_MINOR, | |
71 | .name = ZFCP_CFDC_DEV_NAME, | |
72 | .fops = &zfcp_cfdc_fops | |
73 | }; | |
74 | ||
75 | /*********************** KERNEL/MODULE PARAMETERS ***************************/ | |
76 | ||
77 | /* declare driver module init/cleanup functions */ | |
78 | module_init(zfcp_module_init); | |
79 | ||
80 | MODULE_AUTHOR("Heiko Carstens <heiko.carstens@de.ibm.com>, " | |
81 | "Andreas Herrman <aherrman@de.ibm.com>, " | |
82 | "Martin Peschke <mpeschke@de.ibm.com>, " | |
83 | "Raimund Schroeder <raimund.schroeder@de.ibm.com>, " | |
84 | "Wolfgang Taphorn <taphorn@de.ibm.com>, " | |
85 | "Aron Zeh <arzeh@de.ibm.com>, " | |
86 | "IBM Deutschland Entwicklung GmbH"); | |
87 | MODULE_DESCRIPTION | |
88 | ("FCP (SCSI over Fibre Channel) HBA driver for IBM eServer zSeries"); | |
89 | MODULE_LICENSE("GPL"); | |
90 | ||
6f71d9bc | 91 | module_param(device, charp, 0400); |
1da177e4 LT |
92 | MODULE_PARM_DESC(device, "specify initial device"); |
93 | ||
6f71d9bc | 94 | module_param(loglevel, uint, 0400); |
1da177e4 LT |
95 | MODULE_PARM_DESC(loglevel, |
96 | "log levels, 8 nibbles: " | |
97 | "FC ERP QDIO CIO Config FSF SCSI Other, " | |
98 | "levels: 0=none 1=normal 2=devel 3=trace"); | |
99 | ||
100 | #ifdef ZFCP_PRINT_FLAGS | |
101 | u32 flags_dump = 0; | |
102 | module_param(flags_dump, uint, 0); | |
103 | #endif | |
104 | ||
105 | /****************************************************************/ | |
106 | /************** Functions without logging ***********************/ | |
107 | /****************************************************************/ | |
108 | ||
109 | void | |
110 | _zfcp_hex_dump(char *addr, int count) | |
111 | { | |
112 | int i; | |
113 | for (i = 0; i < count; i++) { | |
114 | printk("%02x", addr[i]); | |
115 | if ((i % 4) == 3) | |
116 | printk(" "); | |
117 | if ((i % 32) == 31) | |
118 | printk("\n"); | |
119 | } | |
120 | if (((i-1) % 32) != 31) | |
121 | printk("\n"); | |
122 | } | |
123 | ||
124 | /****************************************************************/ | |
125 | /************** Uncategorised Functions *************************/ | |
126 | /****************************************************************/ | |
127 | ||
128 | #define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER | |
129 | ||
130 | static inline int | |
131 | zfcp_fsf_req_is_scsi_cmnd(struct zfcp_fsf_req *fsf_req) | |
132 | { | |
133 | return ((fsf_req->fsf_command == FSF_QTCB_FCP_CMND) && | |
134 | !(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)); | |
135 | } | |
136 | ||
137 | void | |
138 | zfcp_cmd_dbf_event_fsf(const char *text, struct zfcp_fsf_req *fsf_req, | |
139 | void *add_data, int add_length) | |
140 | { | |
141 | struct zfcp_adapter *adapter = fsf_req->adapter; | |
142 | struct scsi_cmnd *scsi_cmnd; | |
143 | int level = 3; | |
144 | int i; | |
145 | unsigned long flags; | |
146 | ||
147 | spin_lock_irqsave(&adapter->dbf_lock, flags); | |
148 | if (zfcp_fsf_req_is_scsi_cmnd(fsf_req)) { | |
149 | scsi_cmnd = fsf_req->data.send_fcp_command_task.scsi_cmnd; | |
150 | debug_text_event(adapter->cmd_dbf, level, "fsferror"); | |
151 | debug_text_event(adapter->cmd_dbf, level, text); | |
152 | debug_event(adapter->cmd_dbf, level, &fsf_req, | |
153 | sizeof (unsigned long)); | |
154 | debug_event(adapter->cmd_dbf, level, &fsf_req->seq_no, | |
155 | sizeof (u32)); | |
156 | debug_event(adapter->cmd_dbf, level, &scsi_cmnd, | |
157 | sizeof (unsigned long)); | |
158 | debug_event(adapter->cmd_dbf, level, &scsi_cmnd->cmnd, | |
159 | min(ZFCP_CMD_DBF_LENGTH, (int)scsi_cmnd->cmd_len)); | |
160 | for (i = 0; i < add_length; i += ZFCP_CMD_DBF_LENGTH) | |
161 | debug_event(adapter->cmd_dbf, | |
162 | level, | |
163 | (char *) add_data + i, | |
164 | min(ZFCP_CMD_DBF_LENGTH, add_length - i)); | |
165 | } | |
166 | spin_unlock_irqrestore(&adapter->dbf_lock, flags); | |
167 | } | |
168 | ||
169 | /* XXX additionally log unit if available */ | |
170 | /* ---> introduce new parameter for unit, see 2.4 code */ | |
171 | void | |
172 | zfcp_cmd_dbf_event_scsi(const char *text, struct scsi_cmnd *scsi_cmnd) | |
173 | { | |
174 | struct zfcp_adapter *adapter; | |
175 | union zfcp_req_data *req_data; | |
176 | struct zfcp_fsf_req *fsf_req; | |
177 | int level = ((host_byte(scsi_cmnd->result) != 0) ? 1 : 5); | |
178 | unsigned long flags; | |
179 | ||
180 | adapter = (struct zfcp_adapter *) scsi_cmnd->device->host->hostdata[0]; | |
181 | req_data = (union zfcp_req_data *) scsi_cmnd->host_scribble; | |
182 | fsf_req = (req_data ? req_data->send_fcp_command_task.fsf_req : NULL); | |
183 | spin_lock_irqsave(&adapter->dbf_lock, flags); | |
184 | debug_text_event(adapter->cmd_dbf, level, "hostbyte"); | |
185 | debug_text_event(adapter->cmd_dbf, level, text); | |
186 | debug_event(adapter->cmd_dbf, level, &scsi_cmnd->result, sizeof (u32)); | |
187 | debug_event(adapter->cmd_dbf, level, &scsi_cmnd, | |
188 | sizeof (unsigned long)); | |
189 | debug_event(adapter->cmd_dbf, level, &scsi_cmnd->cmnd, | |
190 | min(ZFCP_CMD_DBF_LENGTH, (int)scsi_cmnd->cmd_len)); | |
191 | if (likely(fsf_req)) { | |
192 | debug_event(adapter->cmd_dbf, level, &fsf_req, | |
193 | sizeof (unsigned long)); | |
194 | debug_event(adapter->cmd_dbf, level, &fsf_req->seq_no, | |
195 | sizeof (u32)); | |
196 | } else { | |
197 | debug_text_event(adapter->cmd_dbf, level, ""); | |
198 | debug_text_event(adapter->cmd_dbf, level, ""); | |
199 | } | |
200 | spin_unlock_irqrestore(&adapter->dbf_lock, flags); | |
201 | } | |
202 | ||
203 | void | |
204 | zfcp_in_els_dbf_event(struct zfcp_adapter *adapter, const char *text, | |
205 | struct fsf_status_read_buffer *status_buffer, int length) | |
206 | { | |
207 | int level = 1; | |
208 | int i; | |
209 | ||
210 | debug_text_event(adapter->in_els_dbf, level, text); | |
211 | debug_event(adapter->in_els_dbf, level, &status_buffer->d_id, 8); | |
212 | for (i = 0; i < length; i += ZFCP_IN_ELS_DBF_LENGTH) | |
213 | debug_event(adapter->in_els_dbf, | |
214 | level, | |
215 | (char *) status_buffer->payload + i, | |
216 | min(ZFCP_IN_ELS_DBF_LENGTH, length - i)); | |
217 | } | |
218 | ||
219 | /** | |
220 | * zfcp_device_setup - setup function | |
221 | * @str: pointer to parameter string | |
222 | * | |
223 | * Parse "device=..." parameter string. | |
224 | */ | |
225 | static int __init | |
226 | zfcp_device_setup(char *str) | |
227 | { | |
228 | char *tmp; | |
229 | ||
230 | if (!str) | |
231 | return 0; | |
232 | ||
233 | tmp = strchr(str, ','); | |
234 | if (!tmp) | |
235 | goto err_out; | |
236 | *tmp++ = '\0'; | |
237 | strncpy(zfcp_data.init_busid, str, BUS_ID_SIZE); | |
238 | zfcp_data.init_busid[BUS_ID_SIZE-1] = '\0'; | |
239 | ||
240 | zfcp_data.init_wwpn = simple_strtoull(tmp, &tmp, 0); | |
241 | if (*tmp++ != ',') | |
242 | goto err_out; | |
243 | if (*tmp == '\0') | |
244 | goto err_out; | |
245 | ||
246 | zfcp_data.init_fcp_lun = simple_strtoull(tmp, &tmp, 0); | |
247 | if (*tmp != '\0') | |
248 | goto err_out; | |
249 | return 1; | |
250 | ||
251 | err_out: | |
252 | ZFCP_LOG_NORMAL("Parse error for device parameter string %s\n", str); | |
253 | return 0; | |
254 | } | |
255 | ||
256 | static void __init | |
257 | zfcp_init_device_configure(void) | |
258 | { | |
259 | struct zfcp_adapter *adapter; | |
260 | struct zfcp_port *port; | |
261 | struct zfcp_unit *unit; | |
262 | ||
263 | down(&zfcp_data.config_sema); | |
264 | read_lock_irq(&zfcp_data.config_lock); | |
265 | adapter = zfcp_get_adapter_by_busid(zfcp_data.init_busid); | |
266 | if (adapter) | |
267 | zfcp_adapter_get(adapter); | |
268 | read_unlock_irq(&zfcp_data.config_lock); | |
269 | ||
270 | if (adapter == NULL) | |
271 | goto out_adapter; | |
272 | port = zfcp_port_enqueue(adapter, zfcp_data.init_wwpn, 0, 0); | |
273 | if (!port) | |
274 | goto out_port; | |
275 | unit = zfcp_unit_enqueue(port, zfcp_data.init_fcp_lun); | |
276 | if (!unit) | |
277 | goto out_unit; | |
278 | up(&zfcp_data.config_sema); | |
279 | ccw_device_set_online(adapter->ccw_device); | |
280 | zfcp_erp_wait(adapter); | |
281 | down(&zfcp_data.config_sema); | |
282 | zfcp_unit_put(unit); | |
283 | out_unit: | |
284 | zfcp_port_put(port); | |
285 | out_port: | |
286 | zfcp_adapter_put(adapter); | |
287 | out_adapter: | |
288 | up(&zfcp_data.config_sema); | |
289 | return; | |
290 | } | |
291 | ||
292 | static int __init | |
293 | zfcp_module_init(void) | |
294 | { | |
295 | ||
296 | int retval = 0; | |
297 | ||
298 | atomic_set(&zfcp_data.loglevel, loglevel); | |
299 | ||
300 | /* initialize adapter list */ | |
301 | INIT_LIST_HEAD(&zfcp_data.adapter_list_head); | |
302 | ||
303 | /* initialize adapters to be removed list head */ | |
304 | INIT_LIST_HEAD(&zfcp_data.adapter_remove_lh); | |
305 | ||
306 | zfcp_transport_template = fc_attach_transport(&zfcp_transport_functions); | |
307 | if (!zfcp_transport_template) | |
308 | return -ENODEV; | |
309 | ||
1da177e4 LT |
310 | retval = misc_register(&zfcp_cfdc_misc); |
311 | if (retval != 0) { | |
312 | ZFCP_LOG_INFO("registration of misc device " | |
313 | "zfcp_cfdc failed\n"); | |
e183b06b | 314 | goto out; |
1da177e4 LT |
315 | } |
316 | ||
e183b06b | 317 | ZFCP_LOG_TRACE("major/minor for zfcp_cfdc: %d/%d\n", |
318 | ZFCP_CFDC_DEV_MAJOR, zfcp_cfdc_misc.minor); | |
319 | ||
1da177e4 LT |
320 | /* Initialise proc semaphores */ |
321 | sema_init(&zfcp_data.config_sema, 1); | |
322 | ||
323 | /* initialise configuration rw lock */ | |
324 | rwlock_init(&zfcp_data.config_lock); | |
325 | ||
326 | /* save address of data structure managing the driver module */ | |
327 | zfcp_data.scsi_host_template.module = THIS_MODULE; | |
328 | ||
329 | /* setup dynamic I/O */ | |
330 | retval = zfcp_ccw_register(); | |
331 | if (retval) { | |
332 | ZFCP_LOG_NORMAL("registration with common I/O layer failed\n"); | |
333 | goto out_ccw_register; | |
334 | } | |
335 | ||
336 | if (zfcp_device_setup(device)) | |
337 | zfcp_init_device_configure(); | |
338 | ||
339 | goto out; | |
340 | ||
341 | out_ccw_register: | |
342 | misc_deregister(&zfcp_cfdc_misc); | |
1da177e4 LT |
343 | out: |
344 | return retval; | |
345 | } | |
346 | ||
347 | /* | |
348 | * function: zfcp_cfdc_dev_ioctl | |
349 | * | |
350 | * purpose: Handle control file upload/download transaction via IOCTL | |
351 | * interface | |
352 | * | |
353 | * returns: 0 - Operation completed successfuly | |
354 | * -ENOTTY - Unknown IOCTL command | |
355 | * -EINVAL - Invalid sense data record | |
356 | * -ENXIO - The FCP adapter is not available | |
357 | * -EOPNOTSUPP - The FCP adapter does not have CFDC support | |
358 | * -ENOMEM - Insufficient memory | |
359 | * -EFAULT - User space memory I/O operation fault | |
360 | * -EPERM - Cannot create or queue FSF request or create SBALs | |
361 | * -ERESTARTSYS- Received signal (is mapped to EAGAIN by VFS) | |
362 | */ | |
e183b06b | 363 | static long |
364 | zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command, | |
365 | unsigned long buffer) | |
1da177e4 LT |
366 | { |
367 | struct zfcp_cfdc_sense_data *sense_data, __user *sense_data_user; | |
368 | struct zfcp_adapter *adapter = NULL; | |
369 | struct zfcp_fsf_req *fsf_req = NULL; | |
370 | struct zfcp_sg_list *sg_list = NULL; | |
371 | u32 fsf_command, option; | |
372 | char *bus_id = NULL; | |
373 | int retval = 0; | |
374 | ||
375 | sense_data = kmalloc(sizeof(struct zfcp_cfdc_sense_data), GFP_KERNEL); | |
376 | if (sense_data == NULL) { | |
377 | retval = -ENOMEM; | |
378 | goto out; | |
379 | } | |
380 | ||
381 | sg_list = kmalloc(sizeof(struct zfcp_sg_list), GFP_KERNEL); | |
382 | if (sg_list == NULL) { | |
383 | retval = -ENOMEM; | |
384 | goto out; | |
385 | } | |
386 | memset(sg_list, 0, sizeof(*sg_list)); | |
387 | ||
388 | if (command != ZFCP_CFDC_IOC) { | |
389 | ZFCP_LOG_INFO("IOC request code 0x%x invalid\n", command); | |
390 | retval = -ENOTTY; | |
391 | goto out; | |
392 | } | |
393 | ||
394 | if ((sense_data_user = (void __user *) buffer) == NULL) { | |
395 | ZFCP_LOG_INFO("sense data record is required\n"); | |
396 | retval = -EINVAL; | |
397 | goto out; | |
398 | } | |
399 | ||
400 | retval = copy_from_user(sense_data, sense_data_user, | |
401 | sizeof(struct zfcp_cfdc_sense_data)); | |
402 | if (retval) { | |
403 | retval = -EFAULT; | |
404 | goto out; | |
405 | } | |
406 | ||
407 | if (sense_data->signature != ZFCP_CFDC_SIGNATURE) { | |
408 | ZFCP_LOG_INFO("invalid sense data request signature 0x%08x\n", | |
409 | ZFCP_CFDC_SIGNATURE); | |
410 | retval = -EINVAL; | |
411 | goto out; | |
412 | } | |
413 | ||
414 | switch (sense_data->command) { | |
415 | ||
416 | case ZFCP_CFDC_CMND_DOWNLOAD_NORMAL: | |
417 | fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; | |
418 | option = FSF_CFDC_OPTION_NORMAL_MODE; | |
419 | break; | |
420 | ||
421 | case ZFCP_CFDC_CMND_DOWNLOAD_FORCE: | |
422 | fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; | |
423 | option = FSF_CFDC_OPTION_FORCE; | |
424 | break; | |
425 | ||
426 | case ZFCP_CFDC_CMND_FULL_ACCESS: | |
427 | fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; | |
428 | option = FSF_CFDC_OPTION_FULL_ACCESS; | |
429 | break; | |
430 | ||
431 | case ZFCP_CFDC_CMND_RESTRICTED_ACCESS: | |
432 | fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE; | |
433 | option = FSF_CFDC_OPTION_RESTRICTED_ACCESS; | |
434 | break; | |
435 | ||
436 | case ZFCP_CFDC_CMND_UPLOAD: | |
437 | fsf_command = FSF_QTCB_UPLOAD_CONTROL_FILE; | |
438 | option = 0; | |
439 | break; | |
440 | ||
441 | default: | |
442 | ZFCP_LOG_INFO("invalid command code 0x%08x\n", | |
443 | sense_data->command); | |
444 | retval = -EINVAL; | |
445 | goto out; | |
446 | } | |
447 | ||
448 | bus_id = kmalloc(BUS_ID_SIZE, GFP_KERNEL); | |
449 | if (bus_id == NULL) { | |
450 | retval = -ENOMEM; | |
451 | goto out; | |
452 | } | |
453 | snprintf(bus_id, BUS_ID_SIZE, "%d.%d.%04x", | |
454 | (sense_data->devno >> 24), | |
455 | (sense_data->devno >> 16) & 0xFF, | |
456 | (sense_data->devno & 0xFFFF)); | |
457 | ||
458 | read_lock_irq(&zfcp_data.config_lock); | |
459 | adapter = zfcp_get_adapter_by_busid(bus_id); | |
460 | if (adapter) | |
461 | zfcp_adapter_get(adapter); | |
462 | read_unlock_irq(&zfcp_data.config_lock); | |
463 | ||
464 | kfree(bus_id); | |
465 | ||
466 | if (adapter == NULL) { | |
467 | ZFCP_LOG_INFO("invalid adapter\n"); | |
468 | retval = -ENXIO; | |
469 | goto out; | |
470 | } | |
471 | ||
472 | if (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE) { | |
473 | retval = zfcp_sg_list_alloc(sg_list, | |
474 | ZFCP_CFDC_MAX_CONTROL_FILE_SIZE); | |
475 | if (retval) { | |
476 | retval = -ENOMEM; | |
477 | goto out; | |
478 | } | |
479 | } | |
480 | ||
481 | if ((sense_data->command & ZFCP_CFDC_DOWNLOAD) && | |
482 | (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE)) { | |
483 | retval = zfcp_sg_list_copy_from_user( | |
484 | sg_list, &sense_data_user->control_file, | |
485 | ZFCP_CFDC_MAX_CONTROL_FILE_SIZE); | |
486 | if (retval) { | |
487 | retval = -EFAULT; | |
488 | goto out; | |
489 | } | |
490 | } | |
491 | ||
492 | retval = zfcp_fsf_control_file(adapter, &fsf_req, fsf_command, | |
493 | option, sg_list); | |
494 | if (retval) | |
495 | goto out; | |
496 | ||
497 | if ((fsf_req->qtcb->prefix.prot_status != FSF_PROT_GOOD) && | |
498 | (fsf_req->qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) { | |
499 | retval = -ENXIO; | |
500 | goto out; | |
501 | } | |
502 | ||
503 | sense_data->fsf_status = fsf_req->qtcb->header.fsf_status; | |
504 | memcpy(&sense_data->fsf_status_qual, | |
505 | &fsf_req->qtcb->header.fsf_status_qual, | |
506 | sizeof(union fsf_status_qual)); | |
507 | memcpy(&sense_data->payloads, &fsf_req->qtcb->bottom.support.els, 256); | |
508 | ||
509 | retval = copy_to_user(sense_data_user, sense_data, | |
510 | sizeof(struct zfcp_cfdc_sense_data)); | |
511 | if (retval) { | |
512 | retval = -EFAULT; | |
513 | goto out; | |
514 | } | |
515 | ||
516 | if (sense_data->command & ZFCP_CFDC_UPLOAD) { | |
517 | retval = zfcp_sg_list_copy_to_user( | |
518 | &sense_data_user->control_file, sg_list, | |
519 | ZFCP_CFDC_MAX_CONTROL_FILE_SIZE); | |
520 | if (retval) { | |
521 | retval = -EFAULT; | |
522 | goto out; | |
523 | } | |
524 | } | |
525 | ||
526 | out: | |
527 | if (fsf_req != NULL) | |
528 | zfcp_fsf_req_cleanup(fsf_req); | |
529 | ||
530 | if ((adapter != NULL) && (retval != -ENXIO)) | |
531 | zfcp_adapter_put(adapter); | |
532 | ||
533 | if (sg_list != NULL) { | |
534 | zfcp_sg_list_free(sg_list); | |
535 | kfree(sg_list); | |
536 | } | |
537 | ||
538 | if (sense_data != NULL) | |
539 | kfree(sense_data); | |
540 | ||
541 | return retval; | |
542 | } | |
543 | ||
544 | ||
545 | /** | |
546 | * zfcp_sg_list_alloc - create a scatter-gather list of the specified size | |
547 | * @sg_list: structure describing a scatter gather list | |
548 | * @size: size of scatter-gather list | |
549 | * Return: 0 on success, else -ENOMEM | |
550 | * | |
551 | * In sg_list->sg a pointer to the created scatter-gather list is returned, | |
552 | * or NULL if we run out of memory. sg_list->count specifies the number of | |
553 | * elements of the scatter-gather list. The maximum size of a single element | |
554 | * in the scatter-gather list is PAGE_SIZE. | |
555 | */ | |
556 | static inline int | |
557 | zfcp_sg_list_alloc(struct zfcp_sg_list *sg_list, size_t size) | |
558 | { | |
559 | struct scatterlist *sg; | |
560 | unsigned int i; | |
561 | int retval = 0; | |
562 | void *address; | |
563 | ||
564 | BUG_ON(sg_list == NULL); | |
565 | ||
566 | sg_list->count = size >> PAGE_SHIFT; | |
567 | if (size & ~PAGE_MASK) | |
568 | sg_list->count++; | |
569 | sg_list->sg = kmalloc(sg_list->count * sizeof(struct scatterlist), | |
570 | GFP_KERNEL); | |
571 | if (sg_list->sg == NULL) { | |
572 | sg_list->count = 0; | |
573 | retval = -ENOMEM; | |
574 | goto out; | |
575 | } | |
576 | memset(sg_list->sg, 0, sg_list->count * sizeof(struct scatterlist)); | |
577 | ||
578 | for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++) { | |
579 | sg->length = min(size, PAGE_SIZE); | |
580 | sg->offset = 0; | |
581 | address = (void *) get_zeroed_page(GFP_KERNEL); | |
582 | if (address == NULL) { | |
583 | sg_list->count = i; | |
584 | zfcp_sg_list_free(sg_list); | |
585 | retval = -ENOMEM; | |
586 | goto out; | |
587 | } | |
588 | zfcp_address_to_sg(address, sg); | |
589 | size -= sg->length; | |
590 | } | |
591 | ||
592 | out: | |
593 | return retval; | |
594 | } | |
595 | ||
596 | ||
597 | /** | |
598 | * zfcp_sg_list_free - free memory of a scatter-gather list | |
599 | * @sg_list: structure describing a scatter-gather list | |
600 | * | |
601 | * Memory for each element in the scatter-gather list is freed. | |
602 | * Finally sg_list->sg is freed itself and sg_list->count is reset. | |
603 | */ | |
604 | static inline void | |
605 | zfcp_sg_list_free(struct zfcp_sg_list *sg_list) | |
606 | { | |
607 | struct scatterlist *sg; | |
608 | unsigned int i; | |
609 | ||
610 | BUG_ON(sg_list == NULL); | |
611 | ||
612 | for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++) | |
613 | free_page((unsigned long) zfcp_sg_to_address(sg)); | |
614 | ||
615 | sg_list->count = 0; | |
616 | kfree(sg_list->sg); | |
617 | } | |
618 | ||
619 | /** | |
620 | * zfcp_sg_size - determine size of a scatter-gather list | |
621 | * @sg: array of (struct scatterlist) | |
622 | * @sg_count: elements in array | |
623 | * Return: size of entire scatter-gather list | |
624 | */ | |
625 | size_t | |
626 | zfcp_sg_size(struct scatterlist *sg, unsigned int sg_count) | |
627 | { | |
628 | unsigned int i; | |
629 | struct scatterlist *p; | |
630 | size_t size; | |
631 | ||
632 | size = 0; | |
633 | for (i = 0, p = sg; i < sg_count; i++, p++) { | |
634 | BUG_ON(p == NULL); | |
635 | size += p->length; | |
636 | } | |
637 | ||
638 | return size; | |
639 | } | |
640 | ||
641 | ||
642 | /** | |
643 | * zfcp_sg_list_copy_from_user -copy data from user space to scatter-gather list | |
644 | * @sg_list: structure describing a scatter-gather list | |
645 | * @user_buffer: pointer to buffer in user space | |
646 | * @size: number of bytes to be copied | |
647 | * Return: 0 on success, -EFAULT if copy_from_user fails. | |
648 | */ | |
649 | static inline int | |
650 | zfcp_sg_list_copy_from_user(struct zfcp_sg_list *sg_list, | |
651 | void __user *user_buffer, | |
652 | size_t size) | |
653 | { | |
654 | struct scatterlist *sg; | |
655 | unsigned int length; | |
656 | void *zfcp_buffer; | |
657 | int retval = 0; | |
658 | ||
659 | BUG_ON(sg_list == NULL); | |
660 | ||
661 | if (zfcp_sg_size(sg_list->sg, sg_list->count) < size) | |
662 | return -EFAULT; | |
663 | ||
664 | for (sg = sg_list->sg; size > 0; sg++) { | |
665 | length = min((unsigned int)size, sg->length); | |
666 | zfcp_buffer = zfcp_sg_to_address(sg); | |
667 | if (copy_from_user(zfcp_buffer, user_buffer, length)) { | |
668 | retval = -EFAULT; | |
669 | goto out; | |
670 | } | |
671 | user_buffer += length; | |
672 | size -= length; | |
673 | } | |
674 | ||
675 | out: | |
676 | return retval; | |
677 | } | |
678 | ||
679 | ||
680 | /** | |
681 | * zfcp_sg_list_copy_to_user - copy data from scatter-gather list to user space | |
682 | * @user_buffer: pointer to buffer in user space | |
683 | * @sg_list: structure describing a scatter-gather list | |
684 | * @size: number of bytes to be copied | |
685 | * Return: 0 on success, -EFAULT if copy_to_user fails | |
686 | */ | |
687 | static inline int | |
688 | zfcp_sg_list_copy_to_user(void __user *user_buffer, | |
689 | struct zfcp_sg_list *sg_list, | |
690 | size_t size) | |
691 | { | |
692 | struct scatterlist *sg; | |
693 | unsigned int length; | |
694 | void *zfcp_buffer; | |
695 | int retval = 0; | |
696 | ||
697 | BUG_ON(sg_list == NULL); | |
698 | ||
699 | if (zfcp_sg_size(sg_list->sg, sg_list->count) < size) | |
700 | return -EFAULT; | |
701 | ||
702 | for (sg = sg_list->sg; size > 0; sg++) { | |
703 | length = min((unsigned int) size, sg->length); | |
704 | zfcp_buffer = zfcp_sg_to_address(sg); | |
705 | if (copy_to_user(user_buffer, zfcp_buffer, length)) { | |
706 | retval = -EFAULT; | |
707 | goto out; | |
708 | } | |
709 | user_buffer += length; | |
710 | size -= length; | |
711 | } | |
712 | ||
713 | out: | |
714 | return retval; | |
715 | } | |
716 | ||
717 | ||
718 | #undef ZFCP_LOG_AREA | |
719 | ||
720 | /****************************************************************/ | |
721 | /****** Functions for configuration/set-up of structures ********/ | |
722 | /****************************************************************/ | |
723 | ||
724 | #define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG | |
725 | ||
726 | /** | |
727 | * zfcp_get_unit_by_lun - find unit in unit list of port by FCP LUN | |
728 | * @port: pointer to port to search for unit | |
729 | * @fcp_lun: FCP LUN to search for | |
730 | * Traverse list of all units of a port and return pointer to a unit | |
731 | * with the given FCP LUN. | |
732 | */ | |
733 | struct zfcp_unit * | |
734 | zfcp_get_unit_by_lun(struct zfcp_port *port, fcp_lun_t fcp_lun) | |
735 | { | |
736 | struct zfcp_unit *unit; | |
737 | int found = 0; | |
738 | ||
739 | list_for_each_entry(unit, &port->unit_list_head, list) { | |
740 | if ((unit->fcp_lun == fcp_lun) && | |
741 | !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status)) | |
742 | { | |
743 | found = 1; | |
744 | break; | |
745 | } | |
746 | } | |
747 | return found ? unit : NULL; | |
748 | } | |
749 | ||
750 | /** | |
751 | * zfcp_get_port_by_wwpn - find port in port list of adapter by wwpn | |
752 | * @adapter: pointer to adapter to search for port | |
753 | * @wwpn: wwpn to search for | |
754 | * Traverse list of all ports of an adapter and return pointer to a port | |
755 | * with the given wwpn. | |
756 | */ | |
757 | struct zfcp_port * | |
758 | zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, wwn_t wwpn) | |
759 | { | |
760 | struct zfcp_port *port; | |
761 | int found = 0; | |
762 | ||
763 | list_for_each_entry(port, &adapter->port_list_head, list) { | |
764 | if ((port->wwpn == wwpn) && | |
765 | !(atomic_read(&port->status) & | |
766 | (ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE))) { | |
767 | found = 1; | |
768 | break; | |
769 | } | |
770 | } | |
771 | return found ? port : NULL; | |
772 | } | |
773 | ||
774 | /** | |
775 | * zfcp_get_port_by_did - find port in port list of adapter by d_id | |
776 | * @adapter: pointer to adapter to search for port | |
777 | * @d_id: d_id to search for | |
778 | * Traverse list of all ports of an adapter and return pointer to a port | |
779 | * with the given d_id. | |
780 | */ | |
781 | struct zfcp_port * | |
782 | zfcp_get_port_by_did(struct zfcp_adapter *adapter, u32 d_id) | |
783 | { | |
784 | struct zfcp_port *port; | |
785 | int found = 0; | |
786 | ||
787 | list_for_each_entry(port, &adapter->port_list_head, list) { | |
788 | if ((port->d_id == d_id) && | |
789 | !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) | |
790 | { | |
791 | found = 1; | |
792 | break; | |
793 | } | |
794 | } | |
795 | return found ? port : NULL; | |
796 | } | |
797 | ||
798 | /** | |
799 | * zfcp_get_adapter_by_busid - find adpater in adapter list by bus_id | |
800 | * @bus_id: bus_id to search for | |
801 | * Traverse list of all adapters and return pointer to an adapter | |
802 | * with the given bus_id. | |
803 | */ | |
804 | struct zfcp_adapter * | |
805 | zfcp_get_adapter_by_busid(char *bus_id) | |
806 | { | |
807 | struct zfcp_adapter *adapter; | |
808 | int found = 0; | |
809 | ||
810 | list_for_each_entry(adapter, &zfcp_data.adapter_list_head, list) { | |
811 | if ((strncmp(bus_id, zfcp_get_busid_by_adapter(adapter), | |
812 | BUS_ID_SIZE) == 0) && | |
813 | !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, | |
814 | &adapter->status)){ | |
815 | found = 1; | |
816 | break; | |
817 | } | |
818 | } | |
819 | return found ? adapter : NULL; | |
820 | } | |
821 | ||
822 | /** | |
823 | * zfcp_unit_enqueue - enqueue unit to unit list of a port. | |
824 | * @port: pointer to port where unit is added | |
825 | * @fcp_lun: FCP LUN of unit to be enqueued | |
826 | * Return: pointer to enqueued unit on success, NULL on error | |
827 | * Locks: config_sema must be held to serialize changes to the unit list | |
828 | * | |
829 | * Sets up some unit internal structures and creates sysfs entry. | |
830 | */ | |
831 | struct zfcp_unit * | |
832 | zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun) | |
833 | { | |
834 | struct zfcp_unit *unit, *tmp_unit; | |
835 | scsi_lun_t scsi_lun; | |
836 | int found; | |
837 | ||
838 | /* | |
839 | * check that there is no unit with this FCP_LUN already in list | |
840 | * and enqueue it. | |
841 | * Note: Unlike for the adapter and the port, this is an error | |
842 | */ | |
843 | read_lock_irq(&zfcp_data.config_lock); | |
844 | unit = zfcp_get_unit_by_lun(port, fcp_lun); | |
845 | read_unlock_irq(&zfcp_data.config_lock); | |
846 | if (unit) | |
847 | return NULL; | |
848 | ||
849 | unit = kmalloc(sizeof (struct zfcp_unit), GFP_KERNEL); | |
850 | if (!unit) | |
851 | return NULL; | |
852 | memset(unit, 0, sizeof (struct zfcp_unit)); | |
853 | ||
854 | /* initialise reference count stuff */ | |
855 | atomic_set(&unit->refcount, 0); | |
856 | init_waitqueue_head(&unit->remove_wq); | |
857 | ||
858 | unit->port = port; | |
859 | unit->fcp_lun = fcp_lun; | |
860 | ||
861 | /* setup for sysfs registration */ | |
862 | snprintf(unit->sysfs_device.bus_id, BUS_ID_SIZE, "0x%016llx", fcp_lun); | |
863 | unit->sysfs_device.parent = &port->sysfs_device; | |
864 | unit->sysfs_device.release = zfcp_sysfs_unit_release; | |
865 | dev_set_drvdata(&unit->sysfs_device, unit); | |
866 | ||
867 | /* mark unit unusable as long as sysfs registration is not complete */ | |
868 | atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); | |
869 | ||
870 | if (device_register(&unit->sysfs_device)) { | |
871 | kfree(unit); | |
872 | return NULL; | |
873 | } | |
874 | ||
875 | if (zfcp_sysfs_unit_create_files(&unit->sysfs_device)) { | |
876 | device_unregister(&unit->sysfs_device); | |
877 | return NULL; | |
878 | } | |
879 | ||
880 | zfcp_unit_get(unit); | |
881 | ||
882 | scsi_lun = 0; | |
883 | found = 0; | |
884 | write_lock_irq(&zfcp_data.config_lock); | |
885 | list_for_each_entry(tmp_unit, &port->unit_list_head, list) { | |
886 | if (tmp_unit->scsi_lun != scsi_lun) { | |
887 | found = 1; | |
888 | break; | |
889 | } | |
890 | scsi_lun++; | |
891 | } | |
892 | unit->scsi_lun = scsi_lun; | |
893 | if (found) | |
894 | list_add_tail(&unit->list, &tmp_unit->list); | |
895 | else | |
896 | list_add_tail(&unit->list, &port->unit_list_head); | |
897 | atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); | |
898 | atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status); | |
899 | write_unlock_irq(&zfcp_data.config_lock); | |
900 | ||
901 | port->units++; | |
902 | zfcp_port_get(port); | |
903 | ||
904 | return unit; | |
905 | } | |
906 | ||
907 | void | |
908 | zfcp_unit_dequeue(struct zfcp_unit *unit) | |
909 | { | |
910 | zfcp_unit_wait(unit); | |
911 | write_lock_irq(&zfcp_data.config_lock); | |
912 | list_del(&unit->list); | |
913 | write_unlock_irq(&zfcp_data.config_lock); | |
914 | unit->port->units--; | |
915 | zfcp_port_put(unit->port); | |
916 | zfcp_sysfs_unit_remove_files(&unit->sysfs_device); | |
917 | device_unregister(&unit->sysfs_device); | |
918 | } | |
919 | ||
920 | static void * | |
921 | zfcp_mempool_alloc(unsigned int __nocast gfp_mask, void *size) | |
922 | { | |
923 | return kmalloc((size_t) size, gfp_mask); | |
924 | } | |
925 | ||
926 | static void | |
927 | zfcp_mempool_free(void *element, void *size) | |
928 | { | |
929 | kfree(element); | |
930 | } | |
931 | ||
932 | /* | |
933 | * Allocates a combined QTCB/fsf_req buffer for erp actions and fcp/SCSI | |
934 | * commands. | |
935 | * It also genrates fcp-nameserver request/response buffer and unsolicited | |
936 | * status read fsf_req buffers. | |
937 | * | |
938 | * locks: must only be called with zfcp_data.config_sema taken | |
939 | */ | |
940 | static int | |
941 | zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter) | |
942 | { | |
943 | adapter->pool.fsf_req_erp = | |
944 | mempool_create(ZFCP_POOL_FSF_REQ_ERP_NR, | |
945 | zfcp_mempool_alloc, zfcp_mempool_free, (void *) | |
946 | sizeof(struct zfcp_fsf_req_pool_element)); | |
947 | ||
948 | if (NULL == adapter->pool.fsf_req_erp) | |
949 | return -ENOMEM; | |
950 | ||
951 | adapter->pool.fsf_req_scsi = | |
952 | mempool_create(ZFCP_POOL_FSF_REQ_SCSI_NR, | |
953 | zfcp_mempool_alloc, zfcp_mempool_free, (void *) | |
954 | sizeof(struct zfcp_fsf_req_pool_element)); | |
955 | ||
956 | if (NULL == adapter->pool.fsf_req_scsi) | |
957 | return -ENOMEM; | |
958 | ||
959 | adapter->pool.fsf_req_abort = | |
960 | mempool_create(ZFCP_POOL_FSF_REQ_ABORT_NR, | |
961 | zfcp_mempool_alloc, zfcp_mempool_free, (void *) | |
962 | sizeof(struct zfcp_fsf_req_pool_element)); | |
963 | ||
964 | if (NULL == adapter->pool.fsf_req_abort) | |
965 | return -ENOMEM; | |
966 | ||
967 | adapter->pool.fsf_req_status_read = | |
968 | mempool_create(ZFCP_POOL_STATUS_READ_NR, | |
969 | zfcp_mempool_alloc, zfcp_mempool_free, | |
970 | (void *) sizeof(struct zfcp_fsf_req)); | |
971 | ||
972 | if (NULL == adapter->pool.fsf_req_status_read) | |
973 | return -ENOMEM; | |
974 | ||
975 | adapter->pool.data_status_read = | |
976 | mempool_create(ZFCP_POOL_STATUS_READ_NR, | |
977 | zfcp_mempool_alloc, zfcp_mempool_free, | |
978 | (void *) sizeof(struct fsf_status_read_buffer)); | |
979 | ||
980 | if (NULL == adapter->pool.data_status_read) | |
981 | return -ENOMEM; | |
982 | ||
983 | adapter->pool.data_gid_pn = | |
984 | mempool_create(ZFCP_POOL_DATA_GID_PN_NR, | |
985 | zfcp_mempool_alloc, zfcp_mempool_free, (void *) | |
986 | sizeof(struct zfcp_gid_pn_data)); | |
987 | ||
988 | if (NULL == adapter->pool.data_gid_pn) | |
989 | return -ENOMEM; | |
990 | ||
991 | return 0; | |
992 | } | |
993 | ||
994 | /** | |
995 | * zfcp_free_low_mem_buffers - free memory pools of an adapter | |
996 | * @adapter: pointer to zfcp_adapter for which memory pools should be freed | |
997 | * locking: zfcp_data.config_sema must be held | |
998 | */ | |
999 | static void | |
1000 | zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter) | |
1001 | { | |
1002 | if (adapter->pool.fsf_req_erp) | |
1003 | mempool_destroy(adapter->pool.fsf_req_erp); | |
1004 | if (adapter->pool.fsf_req_scsi) | |
1005 | mempool_destroy(adapter->pool.fsf_req_scsi); | |
1006 | if (adapter->pool.fsf_req_abort) | |
1007 | mempool_destroy(adapter->pool.fsf_req_abort); | |
1008 | if (adapter->pool.fsf_req_status_read) | |
1009 | mempool_destroy(adapter->pool.fsf_req_status_read); | |
1010 | if (adapter->pool.data_status_read) | |
1011 | mempool_destroy(adapter->pool.data_status_read); | |
1012 | if (adapter->pool.data_gid_pn) | |
1013 | mempool_destroy(adapter->pool.data_gid_pn); | |
1014 | } | |
1015 | ||
1016 | /** | |
1017 | * zfcp_adapter_debug_register - registers debug feature for an adapter | |
1018 | * @adapter: pointer to adapter for which debug features should be registered | |
1019 | * return: -ENOMEM on error, 0 otherwise | |
1020 | */ | |
1021 | int | |
1022 | zfcp_adapter_debug_register(struct zfcp_adapter *adapter) | |
1023 | { | |
1024 | char dbf_name[20]; | |
1025 | ||
1026 | /* debug feature area which records SCSI command failures (hostbyte) */ | |
1027 | spin_lock_init(&adapter->dbf_lock); | |
1028 | ||
1029 | sprintf(dbf_name, ZFCP_CMD_DBF_NAME "%s", | |
1030 | zfcp_get_busid_by_adapter(adapter)); | |
1031 | adapter->cmd_dbf = debug_register(dbf_name, ZFCP_CMD_DBF_INDEX, | |
1032 | ZFCP_CMD_DBF_AREAS, | |
1033 | ZFCP_CMD_DBF_LENGTH); | |
1034 | debug_register_view(adapter->cmd_dbf, &debug_hex_ascii_view); | |
1035 | debug_set_level(adapter->cmd_dbf, ZFCP_CMD_DBF_LEVEL); | |
1036 | ||
1037 | /* debug feature area which records SCSI command aborts */ | |
1038 | sprintf(dbf_name, ZFCP_ABORT_DBF_NAME "%s", | |
1039 | zfcp_get_busid_by_adapter(adapter)); | |
1040 | adapter->abort_dbf = debug_register(dbf_name, ZFCP_ABORT_DBF_INDEX, | |
1041 | ZFCP_ABORT_DBF_AREAS, | |
1042 | ZFCP_ABORT_DBF_LENGTH); | |
1043 | debug_register_view(adapter->abort_dbf, &debug_hex_ascii_view); | |
1044 | debug_set_level(adapter->abort_dbf, ZFCP_ABORT_DBF_LEVEL); | |
1045 | ||
1046 | /* debug feature area which records incoming ELS commands */ | |
1047 | sprintf(dbf_name, ZFCP_IN_ELS_DBF_NAME "%s", | |
1048 | zfcp_get_busid_by_adapter(adapter)); | |
1049 | adapter->in_els_dbf = debug_register(dbf_name, ZFCP_IN_ELS_DBF_INDEX, | |
1050 | ZFCP_IN_ELS_DBF_AREAS, | |
1051 | ZFCP_IN_ELS_DBF_LENGTH); | |
1052 | debug_register_view(adapter->in_els_dbf, &debug_hex_ascii_view); | |
1053 | debug_set_level(adapter->in_els_dbf, ZFCP_IN_ELS_DBF_LEVEL); | |
1054 | ||
1055 | /* debug feature area which records erp events */ | |
1056 | sprintf(dbf_name, ZFCP_ERP_DBF_NAME "%s", | |
1057 | zfcp_get_busid_by_adapter(adapter)); | |
1058 | adapter->erp_dbf = debug_register(dbf_name, ZFCP_ERP_DBF_INDEX, | |
1059 | ZFCP_ERP_DBF_AREAS, | |
1060 | ZFCP_ERP_DBF_LENGTH); | |
1061 | debug_register_view(adapter->erp_dbf, &debug_hex_ascii_view); | |
1062 | debug_set_level(adapter->erp_dbf, ZFCP_ERP_DBF_LEVEL); | |
1063 | ||
1064 | if (!(adapter->cmd_dbf && adapter->abort_dbf && | |
1065 | adapter->in_els_dbf && adapter->erp_dbf)) { | |
1066 | zfcp_adapter_debug_unregister(adapter); | |
1067 | return -ENOMEM; | |
1068 | } | |
1069 | ||
1070 | return 0; | |
1071 | ||
1072 | } | |
1073 | ||
1074 | /** | |
1075 | * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter | |
1076 | * @adapter: pointer to adapter for which debug features should be unregistered | |
1077 | */ | |
1078 | void | |
1079 | zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter) | |
1080 | { | |
1081 | debug_unregister(adapter->abort_dbf); | |
1082 | debug_unregister(adapter->cmd_dbf); | |
1083 | debug_unregister(adapter->erp_dbf); | |
1084 | debug_unregister(adapter->in_els_dbf); | |
1085 | adapter->abort_dbf = NULL; | |
1086 | adapter->cmd_dbf = NULL; | |
1087 | adapter->erp_dbf = NULL; | |
1088 | adapter->in_els_dbf = NULL; | |
1089 | } | |
1090 | ||
1091 | void | |
1092 | zfcp_dummy_release(struct device *dev) | |
1093 | { | |
1094 | return; | |
1095 | } | |
1096 | ||
1097 | /* | |
1098 | * Enqueues an adapter at the end of the adapter list in the driver data. | |
1099 | * All adapter internal structures are set up. | |
1100 | * Proc-fs entries are also created. | |
1101 | * | |
1102 | * returns: 0 if a new adapter was successfully enqueued | |
1103 | * ZFCP_KNOWN if an adapter with this devno was already present | |
1104 | * -ENOMEM if alloc failed | |
1105 | * locks: config_sema must be held to serialise changes to the adapter list | |
1106 | */ | |
1107 | struct zfcp_adapter * | |
1108 | zfcp_adapter_enqueue(struct ccw_device *ccw_device) | |
1109 | { | |
1110 | int retval = 0; | |
1111 | struct zfcp_adapter *adapter; | |
1112 | ||
1113 | /* | |
1114 | * Note: It is safe to release the list_lock, as any list changes | |
1115 | * are protected by the config_sema, which must be held to get here | |
1116 | */ | |
1117 | ||
1118 | /* try to allocate new adapter data structure (zeroed) */ | |
1119 | adapter = kmalloc(sizeof (struct zfcp_adapter), GFP_KERNEL); | |
1120 | if (!adapter) { | |
1121 | ZFCP_LOG_INFO("error: allocation of base adapter " | |
1122 | "structure failed\n"); | |
1123 | goto out; | |
1124 | } | |
1125 | memset(adapter, 0, sizeof (struct zfcp_adapter)); | |
1126 | ||
1127 | ccw_device->handler = NULL; | |
1128 | ||
1129 | /* save ccw_device pointer */ | |
1130 | adapter->ccw_device = ccw_device; | |
1131 | ||
1132 | retval = zfcp_qdio_allocate_queues(adapter); | |
1133 | if (retval) | |
1134 | goto queues_alloc_failed; | |
1135 | ||
1136 | retval = zfcp_qdio_allocate(adapter); | |
1137 | if (retval) | |
1138 | goto qdio_allocate_failed; | |
1139 | ||
1140 | retval = zfcp_allocate_low_mem_buffers(adapter); | |
1141 | if (retval) { | |
1142 | ZFCP_LOG_INFO("error: pool allocation failed\n"); | |
1143 | goto failed_low_mem_buffers; | |
1144 | } | |
1145 | ||
1146 | /* initialise reference count stuff */ | |
1147 | atomic_set(&adapter->refcount, 0); | |
1148 | init_waitqueue_head(&adapter->remove_wq); | |
1149 | ||
1150 | /* initialise list of ports */ | |
1151 | INIT_LIST_HEAD(&adapter->port_list_head); | |
1152 | ||
1153 | /* initialise list of ports to be removed */ | |
1154 | INIT_LIST_HEAD(&adapter->port_remove_lh); | |
1155 | ||
1156 | /* initialize list of fsf requests */ | |
1157 | rwlock_init(&adapter->fsf_req_list_lock); | |
1158 | INIT_LIST_HEAD(&adapter->fsf_req_list_head); | |
1159 | ||
1160 | /* initialize abort lock */ | |
1161 | rwlock_init(&adapter->abort_lock); | |
1162 | ||
1163 | /* initialise some erp stuff */ | |
1164 | init_waitqueue_head(&adapter->erp_thread_wqh); | |
1165 | init_waitqueue_head(&adapter->erp_done_wqh); | |
1166 | ||
1167 | /* initialize lock of associated request queue */ | |
1168 | rwlock_init(&adapter->request_queue.queue_lock); | |
1169 | ||
1170 | /* intitialise SCSI ER timer */ | |
1171 | init_timer(&adapter->scsi_er_timer); | |
1172 | ||
1173 | /* set FC service class used per default */ | |
1174 | adapter->fc_service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; | |
1175 | ||
1176 | sprintf(adapter->name, "%s", zfcp_get_busid_by_adapter(adapter)); | |
1177 | ASCEBC(adapter->name, strlen(adapter->name)); | |
1178 | ||
1179 | /* mark adapter unusable as long as sysfs registration is not complete */ | |
1180 | atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); | |
1181 | ||
1182 | adapter->ccw_device = ccw_device; | |
1183 | dev_set_drvdata(&ccw_device->dev, adapter); | |
1184 | ||
1185 | if (zfcp_sysfs_adapter_create_files(&ccw_device->dev)) | |
1186 | goto sysfs_failed; | |
1187 | ||
1188 | adapter->generic_services.parent = &adapter->ccw_device->dev; | |
1189 | adapter->generic_services.release = zfcp_dummy_release; | |
1190 | snprintf(adapter->generic_services.bus_id, BUS_ID_SIZE, | |
1191 | "generic_services"); | |
1192 | ||
1193 | if (device_register(&adapter->generic_services)) | |
1194 | goto generic_services_failed; | |
1195 | ||
1196 | /* put allocated adapter at list tail */ | |
1197 | write_lock_irq(&zfcp_data.config_lock); | |
1198 | atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); | |
1199 | list_add_tail(&adapter->list, &zfcp_data.adapter_list_head); | |
1200 | write_unlock_irq(&zfcp_data.config_lock); | |
1201 | ||
1202 | zfcp_data.adapters++; | |
1203 | ||
1204 | goto out; | |
1205 | ||
1206 | generic_services_failed: | |
1207 | zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev); | |
1208 | sysfs_failed: | |
1209 | dev_set_drvdata(&ccw_device->dev, NULL); | |
1210 | failed_low_mem_buffers: | |
1211 | zfcp_free_low_mem_buffers(adapter); | |
1212 | if (qdio_free(ccw_device) != 0) | |
1213 | ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n", | |
1214 | zfcp_get_busid_by_adapter(adapter)); | |
1215 | qdio_allocate_failed: | |
1216 | zfcp_qdio_free_queues(adapter); | |
1217 | queues_alloc_failed: | |
1218 | kfree(adapter); | |
1219 | adapter = NULL; | |
1220 | out: | |
1221 | return adapter; | |
1222 | } | |
1223 | ||
1224 | /* | |
1225 | * returns: 0 - struct zfcp_adapter data structure successfully removed | |
1226 | * !0 - struct zfcp_adapter data structure could not be removed | |
1227 | * (e.g. still used) | |
1228 | * locks: adapter list write lock is assumed to be held by caller | |
1229 | * adapter->fsf_req_list_lock is taken and released within this | |
1230 | * function and must not be held on entry | |
1231 | */ | |
1232 | void | |
1233 | zfcp_adapter_dequeue(struct zfcp_adapter *adapter) | |
1234 | { | |
1235 | int retval = 0; | |
1236 | unsigned long flags; | |
1237 | ||
1238 | device_unregister(&adapter->generic_services); | |
1239 | zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev); | |
1240 | dev_set_drvdata(&adapter->ccw_device->dev, NULL); | |
1241 | /* sanity check: no pending FSF requests */ | |
1242 | read_lock_irqsave(&adapter->fsf_req_list_lock, flags); | |
1243 | retval = !list_empty(&adapter->fsf_req_list_head); | |
1244 | read_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); | |
1245 | if (retval) { | |
1246 | ZFCP_LOG_NORMAL("bug: adapter %s (%p) still in use, " | |
1247 | "%i requests outstanding\n", | |
1248 | zfcp_get_busid_by_adapter(adapter), adapter, | |
1249 | atomic_read(&adapter->fsf_reqs_active)); | |
1250 | retval = -EBUSY; | |
1251 | goto out; | |
1252 | } | |
1253 | ||
1254 | /* remove specified adapter data structure from list */ | |
1255 | write_lock_irq(&zfcp_data.config_lock); | |
1256 | list_del(&adapter->list); | |
1257 | write_unlock_irq(&zfcp_data.config_lock); | |
1258 | ||
1259 | /* decrease number of adapters in list */ | |
1260 | zfcp_data.adapters--; | |
1261 | ||
1262 | ZFCP_LOG_TRACE("adapter %s (%p) removed from list, " | |
1263 | "%i adapters still in list\n", | |
1264 | zfcp_get_busid_by_adapter(adapter), | |
1265 | adapter, zfcp_data.adapters); | |
1266 | ||
1267 | retval = qdio_free(adapter->ccw_device); | |
1268 | if (retval) | |
1269 | ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n", | |
1270 | zfcp_get_busid_by_adapter(adapter)); | |
1271 | ||
1272 | zfcp_free_low_mem_buffers(adapter); | |
1273 | /* free memory of adapter data structure and queues */ | |
1274 | zfcp_qdio_free_queues(adapter); | |
1275 | ZFCP_LOG_TRACE("freeing adapter structure\n"); | |
1276 | kfree(adapter); | |
1277 | out: | |
1278 | return; | |
1279 | } | |
1280 | ||
1281 | /** | |
1282 | * zfcp_port_enqueue - enqueue port to port list of adapter | |
1283 | * @adapter: adapter where remote port is added | |
1284 | * @wwpn: WWPN of the remote port to be enqueued | |
1285 | * @status: initial status for the port | |
1286 | * @d_id: destination id of the remote port to be enqueued | |
1287 | * Return: pointer to enqueued port on success, NULL on error | |
1288 | * Locks: config_sema must be held to serialize changes to the port list | |
1289 | * | |
1290 | * All port internal structures are set up and the sysfs entry is generated. | |
1291 | * d_id is used to enqueue ports with a well known address like the Directory | |
1292 | * Service for nameserver lookup. | |
1293 | */ | |
1294 | struct zfcp_port * | |
1295 | zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, u32 status, | |
1296 | u32 d_id) | |
1297 | { | |
1298 | struct zfcp_port *port, *tmp_port; | |
1299 | int check_wwpn; | |
1300 | scsi_id_t scsi_id; | |
1301 | int found; | |
1302 | ||
1303 | check_wwpn = !(status & ZFCP_STATUS_PORT_NO_WWPN); | |
1304 | ||
1305 | /* | |
1306 | * check that there is no port with this WWPN already in list | |
1307 | */ | |
1308 | if (check_wwpn) { | |
1309 | read_lock_irq(&zfcp_data.config_lock); | |
1310 | port = zfcp_get_port_by_wwpn(adapter, wwpn); | |
1311 | read_unlock_irq(&zfcp_data.config_lock); | |
1312 | if (port) | |
1313 | return NULL; | |
1314 | } | |
1315 | ||
1316 | port = kmalloc(sizeof (struct zfcp_port), GFP_KERNEL); | |
1317 | if (!port) | |
1318 | return NULL; | |
1319 | memset(port, 0, sizeof (struct zfcp_port)); | |
1320 | ||
1321 | /* initialise reference count stuff */ | |
1322 | atomic_set(&port->refcount, 0); | |
1323 | init_waitqueue_head(&port->remove_wq); | |
1324 | ||
1325 | INIT_LIST_HEAD(&port->unit_list_head); | |
1326 | INIT_LIST_HEAD(&port->unit_remove_lh); | |
1327 | ||
1328 | port->adapter = adapter; | |
1329 | ||
1330 | if (check_wwpn) | |
1331 | port->wwpn = wwpn; | |
1332 | ||
1333 | atomic_set_mask(status, &port->status); | |
1334 | ||
1335 | /* setup for sysfs registration */ | |
1336 | if (status & ZFCP_STATUS_PORT_WKA) { | |
1337 | switch (d_id) { | |
1338 | case ZFCP_DID_DIRECTORY_SERVICE: | |
1339 | snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, | |
1340 | "directory"); | |
1341 | break; | |
1342 | case ZFCP_DID_MANAGEMENT_SERVICE: | |
1343 | snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, | |
1344 | "management"); | |
1345 | break; | |
1346 | case ZFCP_DID_KEY_DISTRIBUTION_SERVICE: | |
1347 | snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, | |
1348 | "key_distribution"); | |
1349 | break; | |
1350 | case ZFCP_DID_ALIAS_SERVICE: | |
1351 | snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, | |
1352 | "alias"); | |
1353 | break; | |
1354 | case ZFCP_DID_TIME_SERVICE: | |
1355 | snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, | |
1356 | "time"); | |
1357 | break; | |
1358 | default: | |
1359 | kfree(port); | |
1360 | return NULL; | |
1361 | } | |
1362 | port->d_id = d_id; | |
1363 | port->sysfs_device.parent = &adapter->generic_services; | |
1364 | } else { | |
1365 | snprintf(port->sysfs_device.bus_id, | |
1366 | BUS_ID_SIZE, "0x%016llx", wwpn); | |
1367 | port->sysfs_device.parent = &adapter->ccw_device->dev; | |
1368 | } | |
1369 | port->sysfs_device.release = zfcp_sysfs_port_release; | |
1370 | dev_set_drvdata(&port->sysfs_device, port); | |
1371 | ||
1372 | /* mark port unusable as long as sysfs registration is not complete */ | |
1373 | atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); | |
1374 | ||
1375 | if (device_register(&port->sysfs_device)) { | |
1376 | kfree(port); | |
1377 | return NULL; | |
1378 | } | |
1379 | ||
1380 | if (zfcp_sysfs_port_create_files(&port->sysfs_device, status)) { | |
1381 | device_unregister(&port->sysfs_device); | |
1382 | return NULL; | |
1383 | } | |
1384 | ||
1385 | zfcp_port_get(port); | |
1386 | ||
1387 | scsi_id = 1; | |
1388 | found = 0; | |
1389 | write_lock_irq(&zfcp_data.config_lock); | |
1390 | list_for_each_entry(tmp_port, &adapter->port_list_head, list) { | |
1391 | if (atomic_test_mask(ZFCP_STATUS_PORT_NO_SCSI_ID, | |
1392 | &tmp_port->status)) | |
1393 | continue; | |
1394 | if (tmp_port->scsi_id != scsi_id) { | |
1395 | found = 1; | |
1396 | break; | |
1397 | } | |
1398 | scsi_id++; | |
1399 | } | |
1400 | port->scsi_id = scsi_id; | |
1401 | if (found) | |
1402 | list_add_tail(&port->list, &tmp_port->list); | |
1403 | else | |
1404 | list_add_tail(&port->list, &adapter->port_list_head); | |
1405 | atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); | |
1406 | atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &port->status); | |
1407 | if (d_id == ZFCP_DID_DIRECTORY_SERVICE) | |
1408 | if (!adapter->nameserver_port) | |
1409 | adapter->nameserver_port = port; | |
1410 | adapter->ports++; | |
1411 | write_unlock_irq(&zfcp_data.config_lock); | |
1412 | ||
1413 | zfcp_adapter_get(adapter); | |
1414 | ||
1415 | return port; | |
1416 | } | |
1417 | ||
1418 | void | |
1419 | zfcp_port_dequeue(struct zfcp_port *port) | |
1420 | { | |
1421 | zfcp_port_wait(port); | |
1422 | write_lock_irq(&zfcp_data.config_lock); | |
1423 | list_del(&port->list); | |
1424 | port->adapter->ports--; | |
1425 | write_unlock_irq(&zfcp_data.config_lock); | |
1426 | zfcp_adapter_put(port->adapter); | |
1427 | zfcp_sysfs_port_remove_files(&port->sysfs_device, | |
1428 | atomic_read(&port->status)); | |
1429 | device_unregister(&port->sysfs_device); | |
1430 | } | |
1431 | ||
1432 | /* Enqueues a nameserver port */ | |
1433 | int | |
1434 | zfcp_nameserver_enqueue(struct zfcp_adapter *adapter) | |
1435 | { | |
1436 | struct zfcp_port *port; | |
1437 | ||
1438 | port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA, | |
1439 | ZFCP_DID_DIRECTORY_SERVICE); | |
1440 | if (!port) { | |
1441 | ZFCP_LOG_INFO("error: enqueue of nameserver port for " | |
1442 | "adapter %s failed\n", | |
1443 | zfcp_get_busid_by_adapter(adapter)); | |
1444 | return -ENXIO; | |
1445 | } | |
1446 | zfcp_port_put(port); | |
1447 | ||
1448 | return 0; | |
1449 | } | |
1450 | ||
1451 | #undef ZFCP_LOG_AREA | |
1452 | ||
1453 | /****************************************************************/ | |
1454 | /******* Fibre Channel Standard related Functions **************/ | |
1455 | /****************************************************************/ | |
1456 | ||
1457 | #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FC | |
1458 | ||
1459 | void | |
1460 | zfcp_fsf_incoming_els_rscn(struct zfcp_adapter *adapter, | |
1461 | struct fsf_status_read_buffer *status_buffer) | |
1462 | { | |
1463 | struct fcp_rscn_head *fcp_rscn_head; | |
1464 | struct fcp_rscn_element *fcp_rscn_element; | |
1465 | struct zfcp_port *port; | |
1466 | u16 i; | |
1467 | u16 no_entries; | |
1468 | u32 range_mask; | |
1469 | unsigned long flags; | |
1470 | ||
1471 | fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload; | |
1472 | fcp_rscn_element = (struct fcp_rscn_element *) status_buffer->payload; | |
1473 | ||
1474 | /* see FC-FS */ | |
1475 | no_entries = (fcp_rscn_head->payload_len / 4); | |
1476 | ||
1477 | zfcp_in_els_dbf_event(adapter, "##rscn", status_buffer, | |
1478 | fcp_rscn_head->payload_len); | |
1479 | ||
1480 | debug_text_event(adapter->erp_dbf, 1, "unsol_els_rscn:"); | |
1481 | for (i = 1; i < no_entries; i++) { | |
1482 | /* skip head and start with 1st element */ | |
1483 | fcp_rscn_element++; | |
1484 | switch (fcp_rscn_element->addr_format) { | |
1485 | case ZFCP_PORT_ADDRESS: | |
1486 | ZFCP_LOG_FLAGS(1, "ZFCP_PORT_ADDRESS\n"); | |
1487 | range_mask = ZFCP_PORTS_RANGE_PORT; | |
1488 | break; | |
1489 | case ZFCP_AREA_ADDRESS: | |
1490 | ZFCP_LOG_FLAGS(1, "ZFCP_AREA_ADDRESS\n"); | |
1491 | range_mask = ZFCP_PORTS_RANGE_AREA; | |
1492 | break; | |
1493 | case ZFCP_DOMAIN_ADDRESS: | |
1494 | ZFCP_LOG_FLAGS(1, "ZFCP_DOMAIN_ADDRESS\n"); | |
1495 | range_mask = ZFCP_PORTS_RANGE_DOMAIN; | |
1496 | break; | |
1497 | case ZFCP_FABRIC_ADDRESS: | |
1498 | ZFCP_LOG_FLAGS(1, "ZFCP_FABRIC_ADDRESS\n"); | |
1499 | range_mask = ZFCP_PORTS_RANGE_FABRIC; | |
1500 | break; | |
1501 | default: | |
1502 | ZFCP_LOG_INFO("incoming RSCN with unknown " | |
1503 | "address format\n"); | |
1504 | continue; | |
1505 | } | |
1506 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
1507 | list_for_each_entry(port, &adapter->port_list_head, list) { | |
1508 | if (atomic_test_mask | |
1509 | (ZFCP_STATUS_PORT_WKA, &port->status)) | |
1510 | continue; | |
1511 | /* Do we know this port? If not skip it. */ | |
1512 | if (!atomic_test_mask | |
1513 | (ZFCP_STATUS_PORT_DID_DID, &port->status)) { | |
1514 | ZFCP_LOG_INFO("incoming RSCN, trying to open " | |
1515 | "port 0x%016Lx\n", port->wwpn); | |
1516 | debug_text_event(adapter->erp_dbf, 1, | |
1517 | "unsol_els_rscnu:"); | |
1518 | zfcp_erp_port_reopen(port, | |
1519 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
1520 | continue; | |
1521 | } | |
1522 | ||
1523 | /* | |
1524 | * FIXME: race: d_id might being invalidated | |
1525 | * (...DID_DID reset) | |
1526 | */ | |
1527 | if ((port->d_id & range_mask) | |
1528 | == (fcp_rscn_element->nport_did & range_mask)) { | |
1529 | ZFCP_LOG_TRACE("reopen did 0x%08x\n", | |
1530 | fcp_rscn_element->nport_did); | |
1531 | /* | |
1532 | * Unfortunately, an RSCN does not specify the | |
1533 | * type of change a target underwent. We assume | |
1534 | * that it makes sense to reopen the link. | |
1535 | * FIXME: Shall we try to find out more about | |
1536 | * the target and link state before closing it? | |
1537 | * How to accomplish this? (nameserver?) | |
1538 | * Where would such code be put in? | |
1539 | * (inside or outside erp) | |
1540 | */ | |
1541 | ZFCP_LOG_INFO("incoming RSCN, trying to open " | |
1542 | "port 0x%016Lx\n", port->wwpn); | |
1543 | debug_text_event(adapter->erp_dbf, 1, | |
1544 | "unsol_els_rscnk:"); | |
1545 | zfcp_test_link(port); | |
1546 | } | |
1547 | } | |
1548 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
1549 | } | |
1550 | } | |
1551 | ||
1552 | static void | |
1553 | zfcp_fsf_incoming_els_plogi(struct zfcp_adapter *adapter, | |
1554 | struct fsf_status_read_buffer *status_buffer) | |
1555 | { | |
1556 | logi *els_logi = (logi *) status_buffer->payload; | |
1557 | struct zfcp_port *port; | |
1558 | unsigned long flags; | |
1559 | ||
1560 | zfcp_in_els_dbf_event(adapter, "##plogi", status_buffer, 28); | |
1561 | ||
1562 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
1563 | list_for_each_entry(port, &adapter->port_list_head, list) { | |
1564 | if (port->wwpn == (*(wwn_t *) & els_logi->nport_wwn)) | |
1565 | break; | |
1566 | } | |
1567 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
1568 | ||
1569 | if (!port || (port->wwpn != (*(wwn_t *) & els_logi->nport_wwn))) { | |
1570 | ZFCP_LOG_DEBUG("ignored incoming PLOGI for nonexisting port " | |
1571 | "with d_id 0x%08x on adapter %s\n", | |
1572 | status_buffer->d_id, | |
1573 | zfcp_get_busid_by_adapter(adapter)); | |
1574 | } else { | |
1575 | debug_text_event(adapter->erp_dbf, 1, "unsol_els_plogi:"); | |
1576 | debug_event(adapter->erp_dbf, 1, &els_logi->nport_wwn, 8); | |
1577 | zfcp_erp_port_forced_reopen(port, 0); | |
1578 | } | |
1579 | } | |
1580 | ||
1581 | static void | |
1582 | zfcp_fsf_incoming_els_logo(struct zfcp_adapter *adapter, | |
1583 | struct fsf_status_read_buffer *status_buffer) | |
1584 | { | |
1585 | struct fcp_logo *els_logo = (struct fcp_logo *) status_buffer->payload; | |
1586 | struct zfcp_port *port; | |
1587 | unsigned long flags; | |
1588 | ||
1589 | zfcp_in_els_dbf_event(adapter, "##logo", status_buffer, 16); | |
1590 | ||
1591 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
1592 | list_for_each_entry(port, &adapter->port_list_head, list) { | |
1593 | if (port->wwpn == els_logo->nport_wwpn) | |
1594 | break; | |
1595 | } | |
1596 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
1597 | ||
1598 | if (!port || (port->wwpn != els_logo->nport_wwpn)) { | |
1599 | ZFCP_LOG_DEBUG("ignored incoming LOGO for nonexisting port " | |
1600 | "with d_id 0x%08x on adapter %s\n", | |
1601 | status_buffer->d_id, | |
1602 | zfcp_get_busid_by_adapter(adapter)); | |
1603 | } else { | |
1604 | debug_text_event(adapter->erp_dbf, 1, "unsol_els_logo:"); | |
1605 | debug_event(adapter->erp_dbf, 1, &els_logo->nport_wwpn, 8); | |
1606 | zfcp_erp_port_forced_reopen(port, 0); | |
1607 | } | |
1608 | } | |
1609 | ||
1610 | static void | |
1611 | zfcp_fsf_incoming_els_unknown(struct zfcp_adapter *adapter, | |
1612 | struct fsf_status_read_buffer *status_buffer) | |
1613 | { | |
1614 | zfcp_in_els_dbf_event(adapter, "##undef", status_buffer, 24); | |
1615 | ZFCP_LOG_NORMAL("warning: unknown incoming ELS 0x%08x " | |
1616 | "for adapter %s\n", *(u32 *) (status_buffer->payload), | |
1617 | zfcp_get_busid_by_adapter(adapter)); | |
1618 | ||
1619 | } | |
1620 | ||
1621 | void | |
1622 | zfcp_fsf_incoming_els(struct zfcp_fsf_req *fsf_req) | |
1623 | { | |
1624 | struct fsf_status_read_buffer *status_buffer; | |
1625 | u32 els_type; | |
1626 | struct zfcp_adapter *adapter; | |
1627 | ||
1628 | status_buffer = fsf_req->data.status_read.buffer; | |
1629 | els_type = *(u32 *) (status_buffer->payload); | |
1630 | adapter = fsf_req->adapter; | |
1631 | ||
1632 | if (els_type == LS_PLOGI) | |
1633 | zfcp_fsf_incoming_els_plogi(adapter, status_buffer); | |
1634 | else if (els_type == LS_LOGO) | |
1635 | zfcp_fsf_incoming_els_logo(adapter, status_buffer); | |
1636 | else if ((els_type & 0xffff0000) == LS_RSCN) | |
1637 | /* we are only concerned with the command, not the length */ | |
1638 | zfcp_fsf_incoming_els_rscn(adapter, status_buffer); | |
1639 | else | |
1640 | zfcp_fsf_incoming_els_unknown(adapter, status_buffer); | |
1641 | } | |
1642 | ||
1643 | ||
1644 | /** | |
1645 | * zfcp_gid_pn_buffers_alloc - allocate buffers for GID_PN nameserver request | |
1646 | * @gid_pn: pointer to return pointer to struct zfcp_gid_pn_data | |
1647 | * @pool: pointer to mempool_t if non-null memory pool is used for allocation | |
1648 | */ | |
1649 | static int | |
1650 | zfcp_gid_pn_buffers_alloc(struct zfcp_gid_pn_data **gid_pn, mempool_t *pool) | |
1651 | { | |
1652 | struct zfcp_gid_pn_data *data; | |
1653 | ||
1654 | if (pool != NULL) { | |
1655 | data = mempool_alloc(pool, GFP_ATOMIC); | |
1656 | if (likely(data != NULL)) { | |
1657 | data->ct.pool = pool; | |
1658 | } | |
1659 | } else { | |
1660 | data = kmalloc(sizeof(struct zfcp_gid_pn_data), GFP_ATOMIC); | |
1661 | } | |
1662 | ||
1663 | if (NULL == data) | |
1664 | return -ENOMEM; | |
1665 | ||
1666 | memset(data, 0, sizeof(*data)); | |
1667 | data->ct.req = &data->req; | |
1668 | data->ct.resp = &data->resp; | |
1669 | data->ct.req_count = data->ct.resp_count = 1; | |
1670 | zfcp_address_to_sg(&data->ct_iu_req, &data->req); | |
1671 | zfcp_address_to_sg(&data->ct_iu_resp, &data->resp); | |
1672 | data->req.length = sizeof(struct ct_iu_gid_pn_req); | |
1673 | data->resp.length = sizeof(struct ct_iu_gid_pn_resp); | |
1674 | ||
1675 | *gid_pn = data; | |
1676 | return 0; | |
1677 | } | |
1678 | ||
1679 | /** | |
1680 | * zfcp_gid_pn_buffers_free - free buffers for GID_PN nameserver request | |
1681 | * @gid_pn: pointer to struct zfcp_gid_pn_data which has to be freed | |
1682 | */ | |
1683 | static void | |
1684 | zfcp_gid_pn_buffers_free(struct zfcp_gid_pn_data *gid_pn) | |
1685 | { | |
1686 | if ((gid_pn->ct.pool != 0)) | |
1687 | mempool_free(gid_pn, gid_pn->ct.pool); | |
1688 | else | |
1689 | kfree(gid_pn); | |
1690 | ||
1691 | return; | |
1692 | } | |
1693 | ||
1694 | /** | |
1695 | * zfcp_ns_gid_pn_request - initiate GID_PN nameserver request | |
1696 | * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed | |
1697 | */ | |
1698 | int | |
1699 | zfcp_ns_gid_pn_request(struct zfcp_erp_action *erp_action) | |
1700 | { | |
1701 | int ret; | |
1702 | struct ct_iu_gid_pn_req *ct_iu_req; | |
1703 | struct zfcp_gid_pn_data *gid_pn; | |
1704 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1705 | ||
1706 | ret = zfcp_gid_pn_buffers_alloc(&gid_pn, adapter->pool.data_gid_pn); | |
1707 | if (ret < 0) { | |
1708 | ZFCP_LOG_INFO("error: buffer allocation for gid_pn nameserver " | |
1709 | "request failed for adapter %s\n", | |
1710 | zfcp_get_busid_by_adapter(adapter)); | |
1711 | goto out; | |
1712 | } | |
1713 | ||
1714 | /* setup nameserver request */ | |
1715 | ct_iu_req = zfcp_sg_to_address(gid_pn->ct.req); | |
1716 | ct_iu_req->header.revision = ZFCP_CT_REVISION; | |
1717 | ct_iu_req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; | |
1718 | ct_iu_req->header.gs_subtype = ZFCP_CT_NAME_SERVER; | |
1719 | ct_iu_req->header.options = ZFCP_CT_SYNCHRONOUS; | |
1720 | ct_iu_req->header.cmd_rsp_code = ZFCP_CT_GID_PN; | |
1721 | ct_iu_req->header.max_res_size = ZFCP_CT_MAX_SIZE; | |
1722 | ct_iu_req->wwpn = erp_action->port->wwpn; | |
1723 | ||
1724 | /* setup parameters for send generic command */ | |
1725 | gid_pn->ct.port = adapter->nameserver_port; | |
1726 | gid_pn->ct.handler = zfcp_ns_gid_pn_handler; | |
1727 | gid_pn->ct.handler_data = (unsigned long) gid_pn; | |
1728 | gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT; | |
1729 | gid_pn->ct.timer = &erp_action->timer; | |
1730 | gid_pn->port = erp_action->port; | |
1731 | ||
1732 | ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp, | |
1733 | erp_action); | |
1734 | if (ret) { | |
1735 | ZFCP_LOG_INFO("error: initiation of gid_pn nameserver request " | |
1736 | "failed for adapter %s\n", | |
1737 | zfcp_get_busid_by_adapter(adapter)); | |
1738 | ||
1739 | zfcp_gid_pn_buffers_free(gid_pn); | |
1740 | } | |
1741 | ||
1742 | out: | |
1743 | return ret; | |
1744 | } | |
1745 | ||
1746 | /** | |
1747 | * zfcp_ns_gid_pn_handler - handler for GID_PN nameserver request | |
1748 | * @data: unsigned long, contains pointer to struct zfcp_gid_pn_data | |
1749 | */ | |
1750 | static void zfcp_ns_gid_pn_handler(unsigned long data) | |
1751 | { | |
1752 | struct zfcp_port *port; | |
1753 | struct zfcp_send_ct *ct; | |
1754 | struct ct_iu_gid_pn_req *ct_iu_req; | |
1755 | struct ct_iu_gid_pn_resp *ct_iu_resp; | |
1756 | struct zfcp_gid_pn_data *gid_pn; | |
1757 | ||
1758 | ||
1759 | gid_pn = (struct zfcp_gid_pn_data *) data; | |
1760 | port = gid_pn->port; | |
1761 | ct = &gid_pn->ct; | |
1762 | ct_iu_req = zfcp_sg_to_address(ct->req); | |
1763 | ct_iu_resp = zfcp_sg_to_address(ct->resp); | |
1764 | ||
1765 | if ((ct->status != 0) || zfcp_check_ct_response(&ct_iu_resp->header)) { | |
1766 | /* FIXME: do we need some specific erp entry points */ | |
1767 | atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status); | |
1768 | goto failed; | |
1769 | } | |
1770 | /* paranoia */ | |
1771 | if (ct_iu_req->wwpn != port->wwpn) { | |
1772 | ZFCP_LOG_NORMAL("bug: wwpn 0x%016Lx returned by nameserver " | |
1773 | "lookup does not match expected wwpn 0x%016Lx " | |
1774 | "for adapter %s\n", ct_iu_req->wwpn, port->wwpn, | |
1775 | zfcp_get_busid_by_port(port)); | |
1776 | goto mismatch; | |
1777 | } | |
1778 | ||
1779 | /* looks like a valid d_id */ | |
1780 | port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK; | |
1781 | atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); | |
1782 | ZFCP_LOG_DEBUG("adapter %s: wwpn=0x%016Lx ---> d_id=0x%08x\n", | |
1783 | zfcp_get_busid_by_port(port), port->wwpn, port->d_id); | |
1784 | goto out; | |
1785 | ||
1786 | mismatch: | |
1787 | ZFCP_LOG_DEBUG("CT IUs do not match:\n"); | |
1788 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_req, | |
1789 | sizeof(struct ct_iu_gid_pn_req)); | |
1790 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_resp, | |
1791 | sizeof(struct ct_iu_gid_pn_resp)); | |
1792 | ||
1793 | failed: | |
1794 | ZFCP_LOG_NORMAL("warning: failed gid_pn nameserver request for wwpn " | |
1795 | "0x%016Lx for adapter %s\n", | |
1796 | port->wwpn, zfcp_get_busid_by_port(port)); | |
1797 | out: | |
1798 | zfcp_gid_pn_buffers_free(gid_pn); | |
1799 | return; | |
1800 | } | |
1801 | ||
1802 | /* reject CT_IU reason codes acc. to FC-GS-4 */ | |
1803 | static const struct zfcp_rc_entry zfcp_ct_rc[] = { | |
1804 | {0x01, "invalid command code"}, | |
1805 | {0x02, "invalid version level"}, | |
1806 | {0x03, "logical error"}, | |
1807 | {0x04, "invalid CT_IU size"}, | |
1808 | {0x05, "logical busy"}, | |
1809 | {0x07, "protocol error"}, | |
1810 | {0x09, "unable to perform command request"}, | |
1811 | {0x0b, "command not supported"}, | |
1812 | {0x0d, "server not available"}, | |
1813 | {0x0e, "session could not be established"}, | |
1814 | {0xff, "vendor specific error"}, | |
1815 | {0, NULL}, | |
1816 | }; | |
1817 | ||
1818 | /* LS_RJT reason codes acc. to FC-FS */ | |
1819 | static const struct zfcp_rc_entry zfcp_ls_rjt_rc[] = { | |
1820 | {0x01, "invalid LS_Command code"}, | |
1821 | {0x03, "logical error"}, | |
1822 | {0x05, "logical busy"}, | |
1823 | {0x07, "protocol error"}, | |
1824 | {0x09, "unable to perform command request"}, | |
1825 | {0x0b, "command not supported"}, | |
1826 | {0x0e, "command already in progress"}, | |
1827 | {0xff, "vendor specific error"}, | |
1828 | {0, NULL}, | |
1829 | }; | |
1830 | ||
1831 | /* reject reason codes according to FC-PH/FC-FS */ | |
1832 | static const struct zfcp_rc_entry zfcp_p_rjt_rc[] = { | |
1833 | {0x01, "invalid D_ID"}, | |
1834 | {0x02, "invalid S_ID"}, | |
1835 | {0x03, "Nx_Port not available, temporary"}, | |
1836 | {0x04, "Nx_Port not available, permament"}, | |
1837 | {0x05, "class not supported"}, | |
1838 | {0x06, "delimiter usage error"}, | |
1839 | {0x07, "TYPE not supported"}, | |
1840 | {0x08, "invalid Link_Control"}, | |
1841 | {0x09, "invalid R_CTL field"}, | |
1842 | {0x0a, "invalid F_CTL field"}, | |
1843 | {0x0b, "invalid OX_ID"}, | |
1844 | {0x0c, "invalid RX_ID"}, | |
1845 | {0x0d, "invalid SEQ_ID"}, | |
1846 | {0x0e, "invalid DF_CTL"}, | |
1847 | {0x0f, "invalid SEQ_CNT"}, | |
1848 | {0x10, "invalid parameter field"}, | |
1849 | {0x11, "exchange error"}, | |
1850 | {0x12, "protocol error"}, | |
1851 | {0x13, "incorrect length"}, | |
1852 | {0x14, "unsupported ACK"}, | |
1853 | {0x15, "class of service not supported by entity at FFFFFE"}, | |
1854 | {0x16, "login required"}, | |
1855 | {0x17, "excessive sequences attempted"}, | |
1856 | {0x18, "unable to establish exchange"}, | |
1857 | {0x1a, "fabric path not available"}, | |
1858 | {0x1b, "invalid VC_ID (class 4)"}, | |
1859 | {0x1c, "invalid CS_CTL field"}, | |
1860 | {0x1d, "insufficient resources for VC (class 4)"}, | |
1861 | {0x1f, "invalid class of service"}, | |
1862 | {0x20, "preemption request rejected"}, | |
1863 | {0x21, "preemption not enabled"}, | |
1864 | {0x22, "multicast error"}, | |
1865 | {0x23, "multicast error terminate"}, | |
1866 | {0x24, "process login required"}, | |
1867 | {0xff, "vendor specific reject"}, | |
1868 | {0, NULL}, | |
1869 | }; | |
1870 | ||
1871 | /** | |
1872 | * zfcp_rc_description - return description for given reaon code | |
1873 | * @code: reason code | |
1874 | * @rc_table: table of reason codes and descriptions | |
1875 | */ | |
1876 | static inline const char * | |
1877 | zfcp_rc_description(u8 code, const struct zfcp_rc_entry *rc_table) | |
1878 | { | |
1879 | const char *descr = "unknown reason code"; | |
1880 | ||
1881 | do { | |
1882 | if (code == rc_table->code) { | |
1883 | descr = rc_table->description; | |
1884 | break; | |
1885 | } | |
1886 | rc_table++; | |
1887 | } while (rc_table->code && rc_table->description); | |
1888 | ||
1889 | return descr; | |
1890 | } | |
1891 | ||
1892 | /** | |
1893 | * zfcp_check_ct_response - evaluate reason code for CT_IU | |
1894 | * @rjt: response payload to an CT_IU request | |
1895 | * Return: 0 for accept CT_IU, 1 for reject CT_IU or invlid response code | |
1896 | */ | |
1897 | int | |
1898 | zfcp_check_ct_response(struct ct_hdr *rjt) | |
1899 | { | |
1900 | if (rjt->cmd_rsp_code == ZFCP_CT_ACCEPT) | |
1901 | return 0; | |
1902 | ||
1903 | if (rjt->cmd_rsp_code != ZFCP_CT_REJECT) { | |
1904 | ZFCP_LOG_NORMAL("error: invalid Generic Service command/" | |
1905 | "response code (0x%04hx)\n", | |
1906 | rjt->cmd_rsp_code); | |
1907 | return 1; | |
1908 | } | |
1909 | ||
1910 | ZFCP_LOG_INFO("Generic Service command rejected\n"); | |
1911 | ZFCP_LOG_INFO("%s (0x%02x, 0x%02x, 0x%02x)\n", | |
1912 | zfcp_rc_description(rjt->reason_code, zfcp_ct_rc), | |
1913 | (u32) rjt->reason_code, (u32) rjt->reason_code_expl, | |
1914 | (u32) rjt->vendor_unique); | |
1915 | ||
1916 | return 1; | |
1917 | } | |
1918 | ||
1919 | /** | |
1920 | * zfcp_print_els_rjt - print reject parameter and description for ELS reject | |
1921 | * @rjt_par: reject parameter acc. to FC-PH/FC-FS | |
1922 | * @rc_table: table of reason codes and descriptions | |
1923 | */ | |
1924 | static inline void | |
1925 | zfcp_print_els_rjt(struct zfcp_ls_rjt_par *rjt_par, | |
1926 | const struct zfcp_rc_entry *rc_table) | |
1927 | { | |
1928 | ZFCP_LOG_INFO("%s (%02x %02x %02x %02x)\n", | |
1929 | zfcp_rc_description(rjt_par->reason_code, rc_table), | |
1930 | (u32) rjt_par->action, (u32) rjt_par->reason_code, | |
1931 | (u32) rjt_par->reason_expl, (u32) rjt_par->vendor_unique); | |
1932 | } | |
1933 | ||
1934 | /** | |
1935 | * zfcp_fsf_handle_els_rjt - evaluate status qualifier/reason code on ELS reject | |
1936 | * @sq: status qualifier word | |
1937 | * @rjt_par: reject parameter as described in FC-PH and FC-FS | |
1938 | * Return: -EROMTEIO for LS_RJT, -EREMCHG for invalid D_ID, -EIO else | |
1939 | */ | |
1940 | int | |
1941 | zfcp_handle_els_rjt(u32 sq, struct zfcp_ls_rjt_par *rjt_par) | |
1942 | { | |
1943 | int ret = -EIO; | |
1944 | ||
1945 | if (sq == FSF_IOSTAT_NPORT_RJT) { | |
1946 | ZFCP_LOG_INFO("ELS rejected (P_RJT)\n"); | |
1947 | zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc); | |
1948 | /* invalid d_id */ | |
1949 | if (rjt_par->reason_code == 0x01) | |
1950 | ret = -EREMCHG; | |
1951 | } else if (sq == FSF_IOSTAT_FABRIC_RJT) { | |
1952 | ZFCP_LOG_INFO("ELS rejected (F_RJT)\n"); | |
1953 | zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc); | |
1954 | /* invalid d_id */ | |
1955 | if (rjt_par->reason_code == 0x01) | |
1956 | ret = -EREMCHG; | |
1957 | } else if (sq == FSF_IOSTAT_LS_RJT) { | |
1958 | ZFCP_LOG_INFO("ELS rejected (LS_RJT)\n"); | |
1959 | zfcp_print_els_rjt(rjt_par, zfcp_ls_rjt_rc); | |
1960 | ret = -EREMOTEIO; | |
1961 | } else | |
1962 | ZFCP_LOG_INFO("unexpected SQ: 0x%02x\n", sq); | |
1963 | ||
1964 | return ret; | |
1965 | } | |
1966 | ||
1967 | #undef ZFCP_LOG_AREA |