Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
553448f6 | 2 | * zfcp device driver |
1da177e4 | 3 | * |
553448f6 | 4 | * Module interface and handling of zfcp data structures. |
1da177e4 | 5 | * |
9edf7d75 | 6 | * Copyright IBM Corp. 2002, 2013 |
1da177e4 LT |
7 | */ |
8 | ||
4a9d2d8b AH |
9 | /* |
10 | * Driver authors: | |
11 | * Martin Peschke (originator of the driver) | |
12 | * Raimund Schroeder | |
13 | * Aron Zeh | |
14 | * Wolfgang Taphorn | |
15 | * Stefan Bader | |
16 | * Heiko Carstens (kernel 2.6 port of the driver) | |
17 | * Andreas Herrmann | |
18 | * Maxim Shchetynin | |
19 | * Volker Sameske | |
20 | * Ralph Wuerthner | |
553448f6 CS |
21 | * Michael Loehr |
22 | * Swen Schillig | |
23 | * Christof Schmitt | |
24 | * Martin Petermann | |
25 | * Sven Schuetz | |
9edf7d75 | 26 | * Steffen Maier |
4a9d2d8b AH |
27 | */ |
28 | ||
ecf39d42 CS |
29 | #define KMSG_COMPONENT "zfcp" |
30 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
31 | ||
45633fdc | 32 | #include <linux/miscdevice.h> |
bd43a42b | 33 | #include <linux/seq_file.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
3a4c5d59 | 35 | #include <linux/module.h> |
1da177e4 | 36 | #include "zfcp_ext.h" |
dbf5dfe9 | 37 | #include "zfcp_fc.h" |
b6bd2fb9 | 38 | #include "zfcp_reqlist.h" |
1da177e4 | 39 | |
98df67b3 KS |
40 | #define ZFCP_BUS_ID_SIZE 20 |
41 | ||
4a9d2d8b | 42 | MODULE_AUTHOR("IBM Deutschland Entwicklung GmbH - linux390@de.ibm.com"); |
317e6b65 | 43 | MODULE_DESCRIPTION("FCP HBA driver"); |
1da177e4 LT |
44 | MODULE_LICENSE("GPL"); |
45 | ||
3623ecba CS |
46 | static char *init_device; |
47 | module_param_named(device, init_device, charp, 0400); | |
1da177e4 LT |
48 | MODULE_PARM_DESC(device, "specify initial device"); |
49 | ||
51780d2c CS |
50 | static struct kmem_cache * __init zfcp_cache_hw_align(const char *name, |
51 | unsigned long size) | |
a4623c46 SS |
52 | { |
53 | return kmem_cache_create(name, size, roundup_pow_of_two(size), 0, NULL); | |
54 | } | |
55 | ||
3623ecba | 56 | static void __init zfcp_init_device_configure(char *busid, u64 wwpn, u64 lun) |
1da177e4 | 57 | { |
de3dc572 | 58 | struct ccw_device *cdev; |
1da177e4 LT |
59 | struct zfcp_adapter *adapter; |
60 | struct zfcp_port *port; | |
1da177e4 | 61 | |
de3dc572 SS |
62 | cdev = get_ccwdev_by_busid(&zfcp_ccw_driver, busid); |
63 | if (!cdev) | |
c5afd81e CS |
64 | return; |
65 | ||
de3dc572 SS |
66 | if (ccw_device_set_online(cdev)) |
67 | goto out_ccw_device; | |
1da177e4 | 68 | |
de3dc572 | 69 | adapter = zfcp_ccw_adapter_by_cdev(cdev); |
317e6b65 | 70 | if (!adapter) |
de3dc572 | 71 | goto out_ccw_device; |
c5afd81e CS |
72 | |
73 | port = zfcp_get_port_by_wwpn(adapter, wwpn); | |
74 | if (!port) | |
1da177e4 | 75 | goto out_port; |
91978465 | 76 | flush_work(&port->rport_work); |
091694a5 | 77 | |
1daa4eb5 | 78 | zfcp_unit_add(port, lun); |
615f59e0 | 79 | put_device(&port->dev); |
1daa4eb5 | 80 | |
317e6b65 | 81 | out_port: |
de3dc572 SS |
82 | zfcp_ccw_adapter_put(adapter); |
83 | out_ccw_device: | |
84 | put_device(&cdev->dev); | |
1da177e4 LT |
85 | return; |
86 | } | |
87 | ||
3623ecba CS |
88 | static void __init zfcp_init_device_setup(char *devstr) |
89 | { | |
90 | char *token; | |
d10c0858 | 91 | char *str, *str_saved; |
3623ecba CS |
92 | char busid[ZFCP_BUS_ID_SIZE]; |
93 | u64 wwpn, lun; | |
94 | ||
95 | /* duplicate devstr and keep the original for sysfs presentation*/ | |
674c3a99 | 96 | str_saved = kstrdup(devstr, GFP_KERNEL); |
d10c0858 | 97 | str = str_saved; |
3623ecba CS |
98 | if (!str) |
99 | return; | |
100 | ||
3623ecba CS |
101 | token = strsep(&str, ","); |
102 | if (!token || strlen(token) >= ZFCP_BUS_ID_SIZE) | |
103 | goto err_out; | |
104 | strncpy(busid, token, ZFCP_BUS_ID_SIZE); | |
105 | ||
106 | token = strsep(&str, ","); | |
ee732ea8 | 107 | if (!token || kstrtoull(token, 0, (unsigned long long *) &wwpn)) |
3623ecba CS |
108 | goto err_out; |
109 | ||
110 | token = strsep(&str, ","); | |
ee732ea8 | 111 | if (!token || kstrtoull(token, 0, (unsigned long long *) &lun)) |
3623ecba CS |
112 | goto err_out; |
113 | ||
d10c0858 | 114 | kfree(str_saved); |
3623ecba CS |
115 | zfcp_init_device_configure(busid, wwpn, lun); |
116 | return; | |
117 | ||
d10c0858 HC |
118 | err_out: |
119 | kfree(str_saved); | |
3623ecba CS |
120 | pr_err("%s is not a valid SCSI device\n", devstr); |
121 | } | |
122 | ||
317e6b65 | 123 | static int __init zfcp_module_init(void) |
1da177e4 | 124 | { |
dd52e0ea | 125 | int retval = -ENOMEM; |
dd52e0ea | 126 | |
259afe2e CS |
127 | zfcp_fsf_qtcb_cache = zfcp_cache_hw_align("zfcp_fsf_qtcb", |
128 | sizeof(struct fsf_qtcb)); | |
129 | if (!zfcp_fsf_qtcb_cache) | |
a4623c46 SS |
130 | goto out_qtcb_cache; |
131 | ||
087897e3 CS |
132 | zfcp_fc_req_cache = zfcp_cache_hw_align("zfcp_fc_req", |
133 | sizeof(struct zfcp_fc_req)); | |
134 | if (!zfcp_fc_req_cache) | |
135 | goto out_fc_cache; | |
ee744622 | 136 | |
1947c72a | 137 | zfcp_scsi_transport_template = |
dd52e0ea | 138 | fc_attach_transport(&zfcp_transport_functions); |
1947c72a | 139 | if (!zfcp_scsi_transport_template) |
dd52e0ea | 140 | goto out_transport; |
1947c72a | 141 | scsi_transport_reserve_device(zfcp_scsi_transport_template, |
57c23773 CS |
142 | sizeof(struct zfcp_scsi_dev)); |
143 | ||
c1fad417 | 144 | retval = ccw_driver_register(&zfcp_ccw_driver); |
1da177e4 | 145 | if (retval) { |
ecf39d42 | 146 | pr_err("The zfcp device driver could not register with " |
ff3b24fa | 147 | "the common I/O layer\n"); |
1da177e4 LT |
148 | goto out_ccw_register; |
149 | } | |
150 | ||
3623ecba CS |
151 | if (init_device) |
152 | zfcp_init_device_setup(init_device); | |
153 | return 0; | |
1da177e4 | 154 | |
317e6b65 | 155 | out_ccw_register: |
1947c72a | 156 | fc_release_transport(zfcp_scsi_transport_template); |
317e6b65 | 157 | out_transport: |
087897e3 CS |
158 | kmem_cache_destroy(zfcp_fc_req_cache); |
159 | out_fc_cache: | |
259afe2e | 160 | kmem_cache_destroy(zfcp_fsf_qtcb_cache); |
a4623c46 | 161 | out_qtcb_cache: |
1da177e4 LT |
162 | return retval; |
163 | } | |
164 | ||
317e6b65 | 165 | module_init(zfcp_module_init); |
1da177e4 | 166 | |
c1fad417 CS |
167 | static void __exit zfcp_module_exit(void) |
168 | { | |
169 | ccw_driver_unregister(&zfcp_ccw_driver); | |
1947c72a | 170 | fc_release_transport(zfcp_scsi_transport_template); |
087897e3 | 171 | kmem_cache_destroy(zfcp_fc_req_cache); |
259afe2e | 172 | kmem_cache_destroy(zfcp_fsf_qtcb_cache); |
c1fad417 CS |
173 | } |
174 | ||
175 | module_exit(zfcp_module_exit); | |
176 | ||
1da177e4 LT |
177 | /** |
178 | * zfcp_get_port_by_wwpn - find port in port list of adapter by wwpn | |
179 | * @adapter: pointer to adapter to search for port | |
180 | * @wwpn: wwpn to search for | |
317e6b65 SS |
181 | * |
182 | * Returns: pointer to zfcp_port or NULL | |
1da177e4 | 183 | */ |
317e6b65 | 184 | struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, |
7ba58c9c | 185 | u64 wwpn) |
1da177e4 | 186 | { |
ecf0c772 | 187 | unsigned long flags; |
1da177e4 | 188 | struct zfcp_port *port; |
1da177e4 | 189 | |
ecf0c772 SS |
190 | read_lock_irqsave(&adapter->port_list_lock, flags); |
191 | list_for_each_entry(port, &adapter->port_list, list) | |
6b183334 | 192 | if (port->wwpn == wwpn) { |
615f59e0 | 193 | if (!get_device(&port->dev)) |
6b183334 | 194 | port = NULL; |
ecf0c772 | 195 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
317e6b65 | 196 | return port; |
ecf0c772 SS |
197 | } |
198 | read_unlock_irqrestore(&adapter->port_list_lock, flags); | |
317e6b65 | 199 | return NULL; |
1da177e4 LT |
200 | } |
201 | ||
317e6b65 | 202 | static int zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter) |
1da177e4 | 203 | { |
a4623c46 SS |
204 | adapter->pool.erp_req = |
205 | mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req)); | |
206 | if (!adapter->pool.erp_req) | |
1da177e4 LT |
207 | return -ENOMEM; |
208 | ||
799b76d0 CS |
209 | adapter->pool.gid_pn_req = |
210 | mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req)); | |
211 | if (!adapter->pool.gid_pn_req) | |
212 | return -ENOMEM; | |
213 | ||
a4623c46 SS |
214 | adapter->pool.scsi_req = |
215 | mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req)); | |
216 | if (!adapter->pool.scsi_req) | |
1da177e4 LT |
217 | return -ENOMEM; |
218 | ||
a4623c46 SS |
219 | adapter->pool.scsi_abort = |
220 | mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req)); | |
221 | if (!adapter->pool.scsi_abort) | |
1da177e4 LT |
222 | return -ENOMEM; |
223 | ||
a4623c46 | 224 | adapter->pool.status_read_req = |
317e6b65 | 225 | mempool_create_kmalloc_pool(FSF_STATUS_READS_RECOM, |
0eaae62a | 226 | sizeof(struct zfcp_fsf_req)); |
a4623c46 SS |
227 | if (!adapter->pool.status_read_req) |
228 | return -ENOMEM; | |
229 | ||
230 | adapter->pool.qtcb_pool = | |
259afe2e | 231 | mempool_create_slab_pool(4, zfcp_fsf_qtcb_cache); |
a4623c46 | 232 | if (!adapter->pool.qtcb_pool) |
1da177e4 LT |
233 | return -ENOMEM; |
234 | ||
c7b279ae CS |
235 | BUILD_BUG_ON(sizeof(struct fsf_status_read_buffer) > PAGE_SIZE); |
236 | adapter->pool.sr_data = | |
237 | mempool_create_page_pool(FSF_STATUS_READS_RECOM, 0); | |
238 | if (!adapter->pool.sr_data) | |
1da177e4 LT |
239 | return -ENOMEM; |
240 | ||
dbf5dfe9 | 241 | adapter->pool.gid_pn = |
fcf7e614 | 242 | mempool_create_slab_pool(1, zfcp_fc_req_cache); |
dbf5dfe9 | 243 | if (!adapter->pool.gid_pn) |
1da177e4 LT |
244 | return -ENOMEM; |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
317e6b65 | 249 | static void zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter) |
1da177e4 | 250 | { |
a4623c46 SS |
251 | if (adapter->pool.erp_req) |
252 | mempool_destroy(adapter->pool.erp_req); | |
253 | if (adapter->pool.scsi_req) | |
254 | mempool_destroy(adapter->pool.scsi_req); | |
255 | if (adapter->pool.scsi_abort) | |
256 | mempool_destroy(adapter->pool.scsi_abort); | |
257 | if (adapter->pool.qtcb_pool) | |
258 | mempool_destroy(adapter->pool.qtcb_pool); | |
259 | if (adapter->pool.status_read_req) | |
260 | mempool_destroy(adapter->pool.status_read_req); | |
c7b279ae CS |
261 | if (adapter->pool.sr_data) |
262 | mempool_destroy(adapter->pool.sr_data); | |
dbf5dfe9 CS |
263 | if (adapter->pool.gid_pn) |
264 | mempool_destroy(adapter->pool.gid_pn); | |
1da177e4 LT |
265 | } |
266 | ||
317e6b65 SS |
267 | /** |
268 | * zfcp_status_read_refill - refill the long running status_read_requests | |
269 | * @adapter: ptr to struct zfcp_adapter for which the buffers should be refilled | |
270 | * | |
271 | * Returns: 0 on success, 1 otherwise | |
272 | * | |
273 | * if there are 16 or more status_read requests missing an adapter_reopen | |
274 | * is triggered | |
275 | */ | |
d26ab06e SS |
276 | int zfcp_status_read_refill(struct zfcp_adapter *adapter) |
277 | { | |
278 | while (atomic_read(&adapter->stat_miss) > 0) | |
564e1c86 | 279 | if (zfcp_fsf_status_read(adapter->qdio)) { |
64deb6ef CS |
280 | if (atomic_read(&adapter->stat_miss) >= |
281 | adapter->stat_read_buf_num) { | |
ea4a3a6a | 282 | zfcp_erp_adapter_reopen(adapter, 0, "axsref1"); |
7afe29f7 SS |
283 | return 1; |
284 | } | |
d26ab06e | 285 | break; |
7afe29f7 SS |
286 | } else |
287 | atomic_dec(&adapter->stat_miss); | |
d26ab06e SS |
288 | return 0; |
289 | } | |
290 | ||
291 | static void _zfcp_status_read_scheduler(struct work_struct *work) | |
292 | { | |
293 | zfcp_status_read_refill(container_of(work, struct zfcp_adapter, | |
294 | stat_work)); | |
295 | } | |
296 | ||
bd43a42b CS |
297 | static void zfcp_print_sl(struct seq_file *m, struct service_level *sl) |
298 | { | |
299 | struct zfcp_adapter *adapter = | |
300 | container_of(sl, struct zfcp_adapter, service_level); | |
301 | ||
302 | seq_printf(m, "zfcp: %s microcode level %x\n", | |
303 | dev_name(&adapter->ccw_device->dev), | |
304 | adapter->fsf_lic_version); | |
305 | } | |
306 | ||
4544683a SS |
307 | static int zfcp_setup_adapter_work_queue(struct zfcp_adapter *adapter) |
308 | { | |
309 | char name[TASK_COMM_LEN]; | |
310 | ||
311 | snprintf(name, sizeof(name), "zfcp_q_%s", | |
312 | dev_name(&adapter->ccw_device->dev)); | |
313 | adapter->work_queue = create_singlethread_workqueue(name); | |
314 | ||
315 | if (adapter->work_queue) | |
316 | return 0; | |
317 | return -ENOMEM; | |
318 | } | |
319 | ||
320 | static void zfcp_destroy_adapter_work_queue(struct zfcp_adapter *adapter) | |
321 | { | |
322 | if (adapter->work_queue) | |
323 | destroy_workqueue(adapter->work_queue); | |
324 | adapter->work_queue = NULL; | |
325 | ||
326 | } | |
327 | ||
317e6b65 SS |
328 | /** |
329 | * zfcp_adapter_enqueue - enqueue a new adapter to the list | |
330 | * @ccw_device: pointer to the struct cc_device | |
331 | * | |
de3dc572 | 332 | * Returns: struct zfcp_adapter* |
1da177e4 LT |
333 | * Enqueues an adapter at the end of the adapter list in the driver data. |
334 | * All adapter internal structures are set up. | |
335 | * Proc-fs entries are also created. | |
1da177e4 | 336 | */ |
de3dc572 | 337 | struct zfcp_adapter *zfcp_adapter_enqueue(struct ccw_device *ccw_device) |
1da177e4 | 338 | { |
1da177e4 LT |
339 | struct zfcp_adapter *adapter; |
340 | ||
f3450c7b | 341 | if (!get_device(&ccw_device->dev)) |
de3dc572 | 342 | return ERR_PTR(-ENODEV); |
1da177e4 | 343 | |
317e6b65 | 344 | adapter = kzalloc(sizeof(struct zfcp_adapter), GFP_KERNEL); |
f3450c7b SS |
345 | if (!adapter) { |
346 | put_device(&ccw_device->dev); | |
de3dc572 | 347 | return ERR_PTR(-ENOMEM); |
f3450c7b SS |
348 | } |
349 | ||
350 | kref_init(&adapter->ref); | |
1da177e4 LT |
351 | |
352 | ccw_device->handler = NULL; | |
1da177e4 | 353 | adapter->ccw_device = ccw_device; |
f3450c7b SS |
354 | |
355 | INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler); | |
18f87a67 | 356 | INIT_DELAYED_WORK(&adapter->scan_work, zfcp_fc_scan_ports); |
038d9446 | 357 | INIT_WORK(&adapter->ns_up_work, zfcp_fc_sym_name_update); |
1da177e4 | 358 | |
18f87a67 MP |
359 | adapter->next_port_scan = jiffies; |
360 | ||
d5a282a1 | 361 | if (zfcp_qdio_setup(adapter)) |
f3450c7b | 362 | goto failed; |
1da177e4 | 363 | |
00bab910 | 364 | if (zfcp_allocate_low_mem_buffers(adapter)) |
f3450c7b | 365 | goto failed; |
1da177e4 | 366 | |
b6bd2fb9 CS |
367 | adapter->req_list = zfcp_reqlist_alloc(); |
368 | if (!adapter->req_list) | |
f3450c7b | 369 | goto failed; |
317e6b65 | 370 | |
5771710b | 371 | if (zfcp_dbf_adapter_register(adapter)) |
f3450c7b | 372 | goto failed; |
317e6b65 | 373 | |
4544683a | 374 | if (zfcp_setup_adapter_work_queue(adapter)) |
f3450c7b | 375 | goto failed; |
4544683a | 376 | |
d5a282a1 | 377 | if (zfcp_fc_gs_setup(adapter)) |
f3450c7b | 378 | goto failed; |
d5a282a1 | 379 | |
ecf0c772 SS |
380 | rwlock_init(&adapter->port_list_lock); |
381 | INIT_LIST_HEAD(&adapter->port_list); | |
382 | ||
2d1e547f SS |
383 | INIT_LIST_HEAD(&adapter->events.list); |
384 | INIT_WORK(&adapter->events.work, zfcp_fc_post_event); | |
385 | spin_lock_init(&adapter->events.list_lock); | |
386 | ||
347c6a96 | 387 | init_waitqueue_head(&adapter->erp_ready_wq); |
317e6b65 | 388 | init_waitqueue_head(&adapter->erp_done_wqh); |
1da177e4 | 389 | |
317e6b65 SS |
390 | INIT_LIST_HEAD(&adapter->erp_ready_head); |
391 | INIT_LIST_HEAD(&adapter->erp_running_head); | |
1da177e4 | 392 | |
c48a29d0 | 393 | rwlock_init(&adapter->erp_lock); |
1da177e4 LT |
394 | rwlock_init(&adapter->abort_lock); |
395 | ||
143bb6bf | 396 | if (zfcp_erp_thread_setup(adapter)) |
f3450c7b | 397 | goto failed; |
1da177e4 | 398 | |
bd43a42b CS |
399 | adapter->service_level.seq_print = zfcp_print_sl; |
400 | ||
1da177e4 LT |
401 | dev_set_drvdata(&ccw_device->dev, adapter); |
402 | ||
60221920 SS |
403 | if (sysfs_create_group(&ccw_device->dev.kobj, |
404 | &zfcp_sysfs_adapter_attrs)) | |
f3450c7b | 405 | goto failed; |
1da177e4 | 406 | |
68322984 CS |
407 | /* report size limit per scatter-gather segment */ |
408 | adapter->dma_parms.max_segment_size = ZFCP_QDIO_SBALE_LEN; | |
409 | adapter->ccw_device->dev.dma_parms = &adapter->dma_parms; | |
410 | ||
9edf7d75 SM |
411 | adapter->stat_read_buf_num = FSF_STATUS_READS_RECOM; |
412 | ||
1947c72a | 413 | if (!zfcp_scsi_adapter_register(adapter)) |
de3dc572 | 414 | return adapter; |
1da177e4 | 415 | |
f3450c7b | 416 | failed: |
de3dc572 SS |
417 | zfcp_adapter_unregister(adapter); |
418 | return ERR_PTR(-ENOMEM); | |
419 | } | |
420 | ||
421 | void zfcp_adapter_unregister(struct zfcp_adapter *adapter) | |
422 | { | |
423 | struct ccw_device *cdev = adapter->ccw_device; | |
424 | ||
18f87a67 | 425 | cancel_delayed_work_sync(&adapter->scan_work); |
de3dc572 | 426 | cancel_work_sync(&adapter->stat_work); |
038d9446 | 427 | cancel_work_sync(&adapter->ns_up_work); |
de3dc572 SS |
428 | zfcp_destroy_adapter_work_queue(adapter); |
429 | ||
430 | zfcp_fc_wka_ports_force_offline(adapter->gs); | |
1947c72a | 431 | zfcp_scsi_adapter_unregister(adapter); |
de3dc572 SS |
432 | sysfs_remove_group(&cdev->dev.kobj, &zfcp_sysfs_adapter_attrs); |
433 | ||
434 | zfcp_erp_thread_kill(adapter); | |
ea4a3a6a | 435 | zfcp_dbf_adapter_unregister(adapter); |
de3dc572 SS |
436 | zfcp_qdio_destroy(adapter->qdio); |
437 | ||
438 | zfcp_ccw_adapter_put(adapter); /* final put to release */ | |
1da177e4 LT |
439 | } |
440 | ||
317e6b65 | 441 | /** |
f3450c7b SS |
442 | * zfcp_adapter_release - remove the adapter from the resource list |
443 | * @ref: pointer to struct kref | |
1da177e4 | 444 | * locks: adapter list write lock is assumed to be held by caller |
1da177e4 | 445 | */ |
f3450c7b | 446 | void zfcp_adapter_release(struct kref *ref) |
1da177e4 | 447 | { |
f3450c7b SS |
448 | struct zfcp_adapter *adapter = container_of(ref, struct zfcp_adapter, |
449 | ref); | |
de3dc572 | 450 | struct ccw_device *cdev = adapter->ccw_device; |
1da177e4 | 451 | |
f3450c7b | 452 | dev_set_drvdata(&adapter->ccw_device->dev, NULL); |
d5a282a1 | 453 | zfcp_fc_gs_destroy(adapter); |
1da177e4 | 454 | zfcp_free_low_mem_buffers(adapter); |
317e6b65 | 455 | kfree(adapter->req_list); |
f6cd94b1 AH |
456 | kfree(adapter->fc_stats); |
457 | kfree(adapter->stats_reset_data); | |
1da177e4 | 458 | kfree(adapter); |
de3dc572 | 459 | put_device(&cdev->dev); |
f3450c7b SS |
460 | } |
461 | ||
f3450c7b | 462 | static void zfcp_port_release(struct device *dev) |
60221920 | 463 | { |
615f59e0 | 464 | struct zfcp_port *port = container_of(dev, struct zfcp_port, dev); |
f3450c7b | 465 | |
de3dc572 | 466 | zfcp_ccw_adapter_put(port->adapter); |
f3450c7b | 467 | kfree(port); |
60221920 SS |
468 | } |
469 | ||
1da177e4 LT |
470 | /** |
471 | * zfcp_port_enqueue - enqueue port to port list of adapter | |
472 | * @adapter: adapter where remote port is added | |
473 | * @wwpn: WWPN of the remote port to be enqueued | |
474 | * @status: initial status for the port | |
475 | * @d_id: destination id of the remote port to be enqueued | |
317e6b65 | 476 | * Returns: pointer to enqueued port on success, ERR_PTR on error |
1da177e4 LT |
477 | * |
478 | * All port internal structures are set up and the sysfs entry is generated. | |
479 | * d_id is used to enqueue ports with a well known address like the Directory | |
480 | * Service for nameserver lookup. | |
481 | */ | |
7ba58c9c | 482 | struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *adapter, u64 wwpn, |
317e6b65 | 483 | u32 status, u32 d_id) |
1da177e4 | 484 | { |
3859f6a2 | 485 | struct zfcp_port *port; |
f3450c7b SS |
486 | int retval = -ENOMEM; |
487 | ||
488 | kref_get(&adapter->ref); | |
0fac3f47 | 489 | |
ecf0c772 SS |
490 | port = zfcp_get_port_by_wwpn(adapter, wwpn); |
491 | if (port) { | |
615f59e0 | 492 | put_device(&port->dev); |
f3450c7b SS |
493 | retval = -EEXIST; |
494 | goto err_out; | |
0fac3f47 | 495 | } |
1da177e4 | 496 | |
317e6b65 | 497 | port = kzalloc(sizeof(struct zfcp_port), GFP_KERNEL); |
1da177e4 | 498 | if (!port) |
f3450c7b | 499 | goto err_out; |
1da177e4 | 500 | |
ecf0c772 SS |
501 | rwlock_init(&port->unit_list_lock); |
502 | INIT_LIST_HEAD(&port->unit_list); | |
d99b601b | 503 | atomic_set(&port->units, 0); |
ecf0c772 | 504 | |
799b76d0 | 505 | INIT_WORK(&port->gid_pn_work, zfcp_fc_port_did_lookup); |
8fdf30d5 | 506 | INIT_WORK(&port->test_link_work, zfcp_fc_link_test_work); |
a2fa0aed | 507 | INIT_WORK(&port->rport_work, zfcp_scsi_rport_work); |
1da177e4 LT |
508 | |
509 | port->adapter = adapter; | |
317e6b65 SS |
510 | port->d_id = d_id; |
511 | port->wwpn = wwpn; | |
a2fa0aed | 512 | port->rport_task = RPORT_NONE; |
615f59e0 | 513 | port->dev.parent = &adapter->ccw_device->dev; |
83d4e1c3 | 514 | port->dev.groups = zfcp_port_attr_groups; |
615f59e0 | 515 | port->dev.release = zfcp_port_release; |
1da177e4 | 516 | |
615f59e0 | 517 | if (dev_set_name(&port->dev, "0x%016llx", (unsigned long long)wwpn)) { |
0fac3f47 | 518 | kfree(port); |
f3450c7b | 519 | goto err_out; |
0fac3f47 | 520 | } |
f3450c7b | 521 | retval = -EINVAL; |
1da177e4 | 522 | |
615f59e0 CS |
523 | if (device_register(&port->dev)) { |
524 | put_device(&port->dev); | |
f3450c7b | 525 | goto err_out; |
f4395b65 | 526 | } |
1da177e4 | 527 | |
ecf0c772 SS |
528 | write_lock_irq(&adapter->port_list_lock); |
529 | list_add_tail(&port->list, &adapter->port_list); | |
530 | write_unlock_irq(&adapter->port_list_lock); | |
531 | ||
805de8f4 | 532 | atomic_or(status | ZFCP_STATUS_COMMON_RUNNING, &port->status); |
317e6b65 | 533 | |
1da177e4 | 534 | return port; |
1da177e4 | 535 | |
f3450c7b | 536 | err_out: |
de3dc572 | 537 | zfcp_ccw_adapter_put(adapter); |
f3450c7b | 538 | return ERR_PTR(retval); |
1da177e4 LT |
539 | } |
540 | ||
317e6b65 SS |
541 | /** |
542 | * zfcp_sg_free_table - free memory used by scatterlists | |
543 | * @sg: pointer to scatterlist | |
544 | * @count: number of scatterlist which are to be free'ed | |
545 | * the scatterlist are expected to reference pages always | |
546 | */ | |
45633fdc CS |
547 | void zfcp_sg_free_table(struct scatterlist *sg, int count) |
548 | { | |
549 | int i; | |
550 | ||
551 | for (i = 0; i < count; i++, sg++) | |
552 | if (sg) | |
553 | free_page((unsigned long) sg_virt(sg)); | |
554 | else | |
555 | break; | |
556 | } | |
557 | ||
317e6b65 SS |
558 | /** |
559 | * zfcp_sg_setup_table - init scatterlist and allocate, assign buffers | |
560 | * @sg: pointer to struct scatterlist | |
561 | * @count: number of scatterlists which should be assigned with buffers | |
562 | * of size page | |
563 | * | |
564 | * Returns: 0 on success, -ENOMEM otherwise | |
565 | */ | |
45633fdc CS |
566 | int zfcp_sg_setup_table(struct scatterlist *sg, int count) |
567 | { | |
568 | void *addr; | |
569 | int i; | |
570 | ||
571 | sg_init_table(sg, count); | |
572 | for (i = 0; i < count; i++, sg++) { | |
573 | addr = (void *) get_zeroed_page(GFP_KERNEL); | |
574 | if (!addr) { | |
575 | zfcp_sg_free_table(sg, i); | |
576 | return -ENOMEM; | |
577 | } | |
578 | sg_set_buf(sg, addr, PAGE_SIZE); | |
579 | } | |
580 | return 0; | |
581 | } |