Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
553448f6 | 2 | * zfcp device driver |
1da177e4 | 3 | * |
553448f6 | 4 | * Module interface and handling of zfcp data structures. |
1da177e4 | 5 | * |
615f59e0 | 6 | * Copyright IBM Corporation 2002, 2010 |
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 | |
4a9d2d8b AH |
26 | */ |
27 | ||
ecf39d42 CS |
28 | #define KMSG_COMPONENT "zfcp" |
29 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
30 | ||
45633fdc | 31 | #include <linux/miscdevice.h> |
bd43a42b | 32 | #include <linux/seq_file.h> |
1da177e4 | 33 | #include "zfcp_ext.h" |
dbf5dfe9 | 34 | #include "zfcp_fc.h" |
b6bd2fb9 | 35 | #include "zfcp_reqlist.h" |
1da177e4 | 36 | |
98df67b3 KS |
37 | #define ZFCP_BUS_ID_SIZE 20 |
38 | ||
4a9d2d8b | 39 | MODULE_AUTHOR("IBM Deutschland Entwicklung GmbH - linux390@de.ibm.com"); |
317e6b65 | 40 | MODULE_DESCRIPTION("FCP HBA driver"); |
1da177e4 LT |
41 | MODULE_LICENSE("GPL"); |
42 | ||
3623ecba CS |
43 | static char *init_device; |
44 | module_param_named(device, init_device, charp, 0400); | |
1da177e4 LT |
45 | MODULE_PARM_DESC(device, "specify initial device"); |
46 | ||
a4623c46 SS |
47 | static struct kmem_cache *zfcp_cache_hw_align(const char *name, |
48 | unsigned long size) | |
49 | { | |
50 | return kmem_cache_create(name, size, roundup_pow_of_two(size), 0, NULL); | |
51 | } | |
52 | ||
3623ecba | 53 | static void __init zfcp_init_device_configure(char *busid, u64 wwpn, u64 lun) |
1da177e4 | 54 | { |
de3dc572 | 55 | struct ccw_device *cdev; |
1da177e4 LT |
56 | struct zfcp_adapter *adapter; |
57 | struct zfcp_port *port; | |
58 | struct zfcp_unit *unit; | |
59 | ||
de3dc572 SS |
60 | cdev = get_ccwdev_by_busid(&zfcp_ccw_driver, busid); |
61 | if (!cdev) | |
c5afd81e CS |
62 | return; |
63 | ||
de3dc572 SS |
64 | if (ccw_device_set_online(cdev)) |
65 | goto out_ccw_device; | |
1da177e4 | 66 | |
de3dc572 | 67 | adapter = zfcp_ccw_adapter_by_cdev(cdev); |
317e6b65 | 68 | if (!adapter) |
de3dc572 | 69 | goto out_ccw_device; |
c5afd81e CS |
70 | |
71 | port = zfcp_get_port_by_wwpn(adapter, wwpn); | |
72 | if (!port) | |
1da177e4 | 73 | goto out_port; |
c5afd81e | 74 | |
3623ecba | 75 | unit = zfcp_unit_enqueue(port, lun); |
317e6b65 | 76 | if (IS_ERR(unit)) |
1da177e4 | 77 | goto out_unit; |
091694a5 | 78 | |
c5afd81e | 79 | zfcp_erp_unit_reopen(unit, 0, "auidc_1", NULL); |
1da177e4 | 80 | zfcp_erp_wait(adapter); |
92d5193b | 81 | flush_work(&unit->scsi_work); |
091694a5 | 82 | |
317e6b65 | 83 | out_unit: |
615f59e0 | 84 | put_device(&port->dev); |
317e6b65 | 85 | out_port: |
de3dc572 SS |
86 | zfcp_ccw_adapter_put(adapter); |
87 | out_ccw_device: | |
88 | put_device(&cdev->dev); | |
1da177e4 LT |
89 | return; |
90 | } | |
91 | ||
3623ecba CS |
92 | static void __init zfcp_init_device_setup(char *devstr) |
93 | { | |
94 | char *token; | |
d10c0858 | 95 | char *str, *str_saved; |
3623ecba CS |
96 | char busid[ZFCP_BUS_ID_SIZE]; |
97 | u64 wwpn, lun; | |
98 | ||
99 | /* duplicate devstr and keep the original for sysfs presentation*/ | |
d10c0858 HC |
100 | str_saved = kmalloc(strlen(devstr) + 1, GFP_KERNEL); |
101 | str = str_saved; | |
3623ecba CS |
102 | if (!str) |
103 | return; | |
104 | ||
105 | strcpy(str, devstr); | |
106 | ||
107 | token = strsep(&str, ","); | |
108 | if (!token || strlen(token) >= ZFCP_BUS_ID_SIZE) | |
109 | goto err_out; | |
110 | strncpy(busid, token, ZFCP_BUS_ID_SIZE); | |
111 | ||
112 | token = strsep(&str, ","); | |
113 | if (!token || strict_strtoull(token, 0, (unsigned long long *) &wwpn)) | |
114 | goto err_out; | |
115 | ||
116 | token = strsep(&str, ","); | |
117 | if (!token || strict_strtoull(token, 0, (unsigned long long *) &lun)) | |
118 | goto err_out; | |
119 | ||
d10c0858 | 120 | kfree(str_saved); |
3623ecba CS |
121 | zfcp_init_device_configure(busid, wwpn, lun); |
122 | return; | |
123 | ||
d10c0858 HC |
124 | err_out: |
125 | kfree(str_saved); | |
3623ecba CS |
126 | pr_err("%s is not a valid SCSI device\n", devstr); |
127 | } | |
128 | ||
317e6b65 | 129 | static int __init zfcp_module_init(void) |
1da177e4 | 130 | { |
dd52e0ea | 131 | int retval = -ENOMEM; |
dd52e0ea | 132 | |
a4623c46 | 133 | zfcp_data.gpn_ft_cache = zfcp_cache_hw_align("zfcp_gpn", |
dbf5dfe9 | 134 | sizeof(struct zfcp_fc_gpn_ft_req)); |
a4623c46 | 135 | if (!zfcp_data.gpn_ft_cache) |
dd52e0ea | 136 | goto out; |
1da177e4 | 137 | |
a4623c46 SS |
138 | zfcp_data.qtcb_cache = zfcp_cache_hw_align("zfcp_qtcb", |
139 | sizeof(struct fsf_qtcb)); | |
140 | if (!zfcp_data.qtcb_cache) | |
141 | goto out_qtcb_cache; | |
142 | ||
143 | zfcp_data.sr_buffer_cache = zfcp_cache_hw_align("zfcp_sr", | |
144 | sizeof(struct fsf_status_read_buffer)); | |
dd52e0ea HC |
145 | if (!zfcp_data.sr_buffer_cache) |
146 | goto out_sr_cache; | |
147 | ||
a4623c46 | 148 | zfcp_data.gid_pn_cache = zfcp_cache_hw_align("zfcp_gid", |
dbf5dfe9 | 149 | sizeof(struct zfcp_fc_gid_pn)); |
dd52e0ea HC |
150 | if (!zfcp_data.gid_pn_cache) |
151 | goto out_gid_cache; | |
1da177e4 | 152 | |
ee744622 CS |
153 | zfcp_data.adisc_cache = zfcp_cache_hw_align("zfcp_adisc", |
154 | sizeof(struct zfcp_fc_els_adisc)); | |
155 | if (!zfcp_data.adisc_cache) | |
156 | goto out_adisc_cache; | |
157 | ||
dd52e0ea HC |
158 | zfcp_data.scsi_transport_template = |
159 | fc_attach_transport(&zfcp_transport_functions); | |
160 | if (!zfcp_data.scsi_transport_template) | |
161 | goto out_transport; | |
1da177e4 | 162 | |
1da177e4 | 163 | retval = misc_register(&zfcp_cfdc_misc); |
317e6b65 | 164 | if (retval) { |
ecf39d42 | 165 | pr_err("Registering the misc device zfcp_cfdc failed\n"); |
dd52e0ea | 166 | goto out_misc; |
1da177e4 LT |
167 | } |
168 | ||
c1fad417 | 169 | retval = ccw_driver_register(&zfcp_ccw_driver); |
1da177e4 | 170 | if (retval) { |
ecf39d42 | 171 | pr_err("The zfcp device driver could not register with " |
ff3b24fa | 172 | "the common I/O layer\n"); |
1da177e4 LT |
173 | goto out_ccw_register; |
174 | } | |
175 | ||
3623ecba CS |
176 | if (init_device) |
177 | zfcp_init_device_setup(init_device); | |
178 | return 0; | |
1da177e4 | 179 | |
317e6b65 | 180 | out_ccw_register: |
1da177e4 | 181 | misc_deregister(&zfcp_cfdc_misc); |
317e6b65 | 182 | out_misc: |
dd52e0ea | 183 | fc_release_transport(zfcp_data.scsi_transport_template); |
317e6b65 | 184 | out_transport: |
ee744622 CS |
185 | kmem_cache_destroy(zfcp_data.adisc_cache); |
186 | out_adisc_cache: | |
dd52e0ea | 187 | kmem_cache_destroy(zfcp_data.gid_pn_cache); |
317e6b65 | 188 | out_gid_cache: |
dd52e0ea | 189 | kmem_cache_destroy(zfcp_data.sr_buffer_cache); |
317e6b65 | 190 | out_sr_cache: |
a4623c46 SS |
191 | kmem_cache_destroy(zfcp_data.qtcb_cache); |
192 | out_qtcb_cache: | |
193 | kmem_cache_destroy(zfcp_data.gpn_ft_cache); | |
317e6b65 | 194 | out: |
1da177e4 LT |
195 | return retval; |
196 | } | |
197 | ||
317e6b65 | 198 | module_init(zfcp_module_init); |
1da177e4 | 199 | |
c1fad417 CS |
200 | static void __exit zfcp_module_exit(void) |
201 | { | |
202 | ccw_driver_unregister(&zfcp_ccw_driver); | |
203 | misc_deregister(&zfcp_cfdc_misc); | |
204 | fc_release_transport(zfcp_data.scsi_transport_template); | |
ee744622 | 205 | kmem_cache_destroy(zfcp_data.adisc_cache); |
c1fad417 CS |
206 | kmem_cache_destroy(zfcp_data.gid_pn_cache); |
207 | kmem_cache_destroy(zfcp_data.sr_buffer_cache); | |
208 | kmem_cache_destroy(zfcp_data.qtcb_cache); | |
209 | kmem_cache_destroy(zfcp_data.gpn_ft_cache); | |
210 | } | |
211 | ||
212 | module_exit(zfcp_module_exit); | |
213 | ||
1da177e4 LT |
214 | /** |
215 | * zfcp_get_unit_by_lun - find unit in unit list of port by FCP LUN | |
216 | * @port: pointer to port to search for unit | |
217 | * @fcp_lun: FCP LUN to search for | |
317e6b65 SS |
218 | * |
219 | * Returns: pointer to zfcp_unit or NULL | |
1da177e4 | 220 | */ |
7ba58c9c | 221 | struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *port, u64 fcp_lun) |
1da177e4 | 222 | { |
ecf0c772 | 223 | unsigned long flags; |
1da177e4 | 224 | struct zfcp_unit *unit; |
1da177e4 | 225 | |
ecf0c772 SS |
226 | read_lock_irqsave(&port->unit_list_lock, flags); |
227 | list_for_each_entry(unit, &port->unit_list, list) | |
6b183334 | 228 | if (unit->fcp_lun == fcp_lun) { |
615f59e0 | 229 | if (!get_device(&unit->dev)) |
6b183334 | 230 | unit = NULL; |
ecf0c772 SS |
231 | read_unlock_irqrestore(&port->unit_list_lock, flags); |
232 | return unit; | |
233 | } | |
234 | read_unlock_irqrestore(&port->unit_list_lock, flags); | |
317e6b65 | 235 | return NULL; |
1da177e4 LT |
236 | } |
237 | ||
238 | /** | |
239 | * zfcp_get_port_by_wwpn - find port in port list of adapter by wwpn | |
240 | * @adapter: pointer to adapter to search for port | |
241 | * @wwpn: wwpn to search for | |
317e6b65 SS |
242 | * |
243 | * Returns: pointer to zfcp_port or NULL | |
1da177e4 | 244 | */ |
317e6b65 | 245 | struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, |
7ba58c9c | 246 | u64 wwpn) |
1da177e4 | 247 | { |
ecf0c772 | 248 | unsigned long flags; |
1da177e4 | 249 | struct zfcp_port *port; |
1da177e4 | 250 | |
ecf0c772 SS |
251 | read_lock_irqsave(&adapter->port_list_lock, flags); |
252 | list_for_each_entry(port, &adapter->port_list, list) | |
6b183334 | 253 | if (port->wwpn == wwpn) { |
615f59e0 | 254 | if (!get_device(&port->dev)) |
6b183334 | 255 | port = NULL; |
ecf0c772 | 256 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
317e6b65 | 257 | return port; |
ecf0c772 SS |
258 | } |
259 | read_unlock_irqrestore(&adapter->port_list_lock, flags); | |
317e6b65 | 260 | return NULL; |
1da177e4 LT |
261 | } |
262 | ||
f3450c7b SS |
263 | /** |
264 | * zfcp_unit_release - dequeue unit | |
265 | * @dev: pointer to device | |
266 | * | |
267 | * waits until all work is done on unit and removes it then from the unit->list | |
268 | * of the associated port. | |
269 | */ | |
270 | static void zfcp_unit_release(struct device *dev) | |
60221920 | 271 | { |
615f59e0 | 272 | struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev); |
f3450c7b | 273 | |
615f59e0 | 274 | put_device(&unit->port->dev); |
f3450c7b | 275 | kfree(unit); |
60221920 SS |
276 | } |
277 | ||
1da177e4 LT |
278 | /** |
279 | * zfcp_unit_enqueue - enqueue unit to unit list of a port. | |
280 | * @port: pointer to port where unit is added | |
281 | * @fcp_lun: FCP LUN of unit to be enqueued | |
317e6b65 | 282 | * Returns: pointer to enqueued unit on success, ERR_PTR on error |
1da177e4 LT |
283 | * |
284 | * Sets up some unit internal structures and creates sysfs entry. | |
285 | */ | |
7ba58c9c | 286 | struct zfcp_unit *zfcp_unit_enqueue(struct zfcp_port *port, u64 fcp_lun) |
1da177e4 | 287 | { |
462b7859 | 288 | struct zfcp_unit *unit; |
f3450c7b SS |
289 | int retval = -ENOMEM; |
290 | ||
615f59e0 | 291 | get_device(&port->dev); |
1da177e4 | 292 | |
ecf0c772 SS |
293 | unit = zfcp_get_unit_by_lun(port, fcp_lun); |
294 | if (unit) { | |
615f59e0 | 295 | put_device(&unit->dev); |
f3450c7b SS |
296 | retval = -EEXIST; |
297 | goto err_out; | |
0fac3f47 | 298 | } |
0fac3f47 | 299 | |
317e6b65 | 300 | unit = kzalloc(sizeof(struct zfcp_unit), GFP_KERNEL); |
1da177e4 | 301 | if (!unit) |
f3450c7b | 302 | goto err_out; |
1da177e4 LT |
303 | |
304 | unit->port = port; | |
305 | unit->fcp_lun = fcp_lun; | |
615f59e0 CS |
306 | unit->dev.parent = &port->dev; |
307 | unit->dev.release = zfcp_unit_release; | |
1da177e4 | 308 | |
615f59e0 | 309 | if (dev_set_name(&unit->dev, "0x%016llx", |
0fac3f47 CS |
310 | (unsigned long long) fcp_lun)) { |
311 | kfree(unit); | |
f3450c7b | 312 | goto err_out; |
0fac3f47 | 313 | } |
f3450c7b | 314 | retval = -EINVAL; |
1da177e4 | 315 | |
f3450c7b SS |
316 | INIT_WORK(&unit->scsi_work, zfcp_scsi_scan); |
317 | ||
c9615858 CS |
318 | spin_lock_init(&unit->latencies.lock); |
319 | unit->latencies.write.channel.min = 0xFFFFFFFF; | |
320 | unit->latencies.write.fabric.min = 0xFFFFFFFF; | |
321 | unit->latencies.read.channel.min = 0xFFFFFFFF; | |
322 | unit->latencies.read.fabric.min = 0xFFFFFFFF; | |
323 | unit->latencies.cmd.channel.min = 0xFFFFFFFF; | |
324 | unit->latencies.cmd.fabric.min = 0xFFFFFFFF; | |
325 | ||
615f59e0 CS |
326 | if (device_register(&unit->dev)) { |
327 | put_device(&unit->dev); | |
f3450c7b | 328 | goto err_out; |
f4395b65 | 329 | } |
1da177e4 | 330 | |
615f59e0 | 331 | if (sysfs_create_group(&unit->dev.kobj, &zfcp_sysfs_unit_attrs)) |
f3450c7b | 332 | goto err_out_put; |
1da177e4 | 333 | |
ecf0c772 SS |
334 | write_lock_irq(&port->unit_list_lock); |
335 | list_add_tail(&unit->list, &port->unit_list); | |
336 | write_unlock_irq(&port->unit_list_lock); | |
337 | ||
1da177e4 | 338 | atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status); |
317e6b65 | 339 | |
1da177e4 | 340 | return unit; |
ecf0c772 | 341 | |
f3450c7b | 342 | err_out_put: |
615f59e0 | 343 | device_unregister(&unit->dev); |
f3450c7b | 344 | err_out: |
615f59e0 | 345 | put_device(&port->dev); |
f3450c7b | 346 | return ERR_PTR(retval); |
1da177e4 LT |
347 | } |
348 | ||
317e6b65 | 349 | static int zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter) |
1da177e4 | 350 | { |
a4623c46 SS |
351 | adapter->pool.erp_req = |
352 | mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req)); | |
353 | if (!adapter->pool.erp_req) | |
1da177e4 LT |
354 | return -ENOMEM; |
355 | ||
799b76d0 CS |
356 | adapter->pool.gid_pn_req = |
357 | mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req)); | |
358 | if (!adapter->pool.gid_pn_req) | |
359 | return -ENOMEM; | |
360 | ||
a4623c46 SS |
361 | adapter->pool.scsi_req = |
362 | mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req)); | |
363 | if (!adapter->pool.scsi_req) | |
1da177e4 LT |
364 | return -ENOMEM; |
365 | ||
a4623c46 SS |
366 | adapter->pool.scsi_abort = |
367 | mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req)); | |
368 | if (!adapter->pool.scsi_abort) | |
1da177e4 LT |
369 | return -ENOMEM; |
370 | ||
a4623c46 | 371 | adapter->pool.status_read_req = |
317e6b65 | 372 | mempool_create_kmalloc_pool(FSF_STATUS_READS_RECOM, |
0eaae62a | 373 | sizeof(struct zfcp_fsf_req)); |
a4623c46 SS |
374 | if (!adapter->pool.status_read_req) |
375 | return -ENOMEM; | |
376 | ||
377 | adapter->pool.qtcb_pool = | |
799b76d0 | 378 | mempool_create_slab_pool(4, zfcp_data.qtcb_cache); |
a4623c46 | 379 | if (!adapter->pool.qtcb_pool) |
1da177e4 LT |
380 | return -ENOMEM; |
381 | ||
a4623c46 | 382 | adapter->pool.status_read_data = |
317e6b65 | 383 | mempool_create_slab_pool(FSF_STATUS_READS_RECOM, |
dd52e0ea | 384 | zfcp_data.sr_buffer_cache); |
a4623c46 | 385 | if (!adapter->pool.status_read_data) |
1da177e4 LT |
386 | return -ENOMEM; |
387 | ||
dbf5dfe9 | 388 | adapter->pool.gid_pn = |
317e6b65 | 389 | mempool_create_slab_pool(1, zfcp_data.gid_pn_cache); |
dbf5dfe9 | 390 | if (!adapter->pool.gid_pn) |
1da177e4 LT |
391 | return -ENOMEM; |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
317e6b65 | 396 | static void zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter) |
1da177e4 | 397 | { |
a4623c46 SS |
398 | if (adapter->pool.erp_req) |
399 | mempool_destroy(adapter->pool.erp_req); | |
400 | if (adapter->pool.scsi_req) | |
401 | mempool_destroy(adapter->pool.scsi_req); | |
402 | if (adapter->pool.scsi_abort) | |
403 | mempool_destroy(adapter->pool.scsi_abort); | |
404 | if (adapter->pool.qtcb_pool) | |
405 | mempool_destroy(adapter->pool.qtcb_pool); | |
406 | if (adapter->pool.status_read_req) | |
407 | mempool_destroy(adapter->pool.status_read_req); | |
408 | if (adapter->pool.status_read_data) | |
409 | mempool_destroy(adapter->pool.status_read_data); | |
dbf5dfe9 CS |
410 | if (adapter->pool.gid_pn) |
411 | mempool_destroy(adapter->pool.gid_pn); | |
1da177e4 LT |
412 | } |
413 | ||
317e6b65 SS |
414 | /** |
415 | * zfcp_status_read_refill - refill the long running status_read_requests | |
416 | * @adapter: ptr to struct zfcp_adapter for which the buffers should be refilled | |
417 | * | |
418 | * Returns: 0 on success, 1 otherwise | |
419 | * | |
420 | * if there are 16 or more status_read requests missing an adapter_reopen | |
421 | * is triggered | |
422 | */ | |
d26ab06e SS |
423 | int zfcp_status_read_refill(struct zfcp_adapter *adapter) |
424 | { | |
425 | while (atomic_read(&adapter->stat_miss) > 0) | |
564e1c86 | 426 | if (zfcp_fsf_status_read(adapter->qdio)) { |
7afe29f7 | 427 | if (atomic_read(&adapter->stat_miss) >= 16) { |
5ffd51a5 SS |
428 | zfcp_erp_adapter_reopen(adapter, 0, "axsref1", |
429 | NULL); | |
7afe29f7 SS |
430 | return 1; |
431 | } | |
d26ab06e | 432 | break; |
7afe29f7 SS |
433 | } else |
434 | atomic_dec(&adapter->stat_miss); | |
d26ab06e SS |
435 | return 0; |
436 | } | |
437 | ||
438 | static void _zfcp_status_read_scheduler(struct work_struct *work) | |
439 | { | |
440 | zfcp_status_read_refill(container_of(work, struct zfcp_adapter, | |
441 | stat_work)); | |
442 | } | |
443 | ||
bd43a42b CS |
444 | static void zfcp_print_sl(struct seq_file *m, struct service_level *sl) |
445 | { | |
446 | struct zfcp_adapter *adapter = | |
447 | container_of(sl, struct zfcp_adapter, service_level); | |
448 | ||
449 | seq_printf(m, "zfcp: %s microcode level %x\n", | |
450 | dev_name(&adapter->ccw_device->dev), | |
451 | adapter->fsf_lic_version); | |
452 | } | |
453 | ||
4544683a SS |
454 | static int zfcp_setup_adapter_work_queue(struct zfcp_adapter *adapter) |
455 | { | |
456 | char name[TASK_COMM_LEN]; | |
457 | ||
458 | snprintf(name, sizeof(name), "zfcp_q_%s", | |
459 | dev_name(&adapter->ccw_device->dev)); | |
460 | adapter->work_queue = create_singlethread_workqueue(name); | |
461 | ||
462 | if (adapter->work_queue) | |
463 | return 0; | |
464 | return -ENOMEM; | |
465 | } | |
466 | ||
467 | static void zfcp_destroy_adapter_work_queue(struct zfcp_adapter *adapter) | |
468 | { | |
469 | if (adapter->work_queue) | |
470 | destroy_workqueue(adapter->work_queue); | |
471 | adapter->work_queue = NULL; | |
472 | ||
473 | } | |
474 | ||
317e6b65 SS |
475 | /** |
476 | * zfcp_adapter_enqueue - enqueue a new adapter to the list | |
477 | * @ccw_device: pointer to the struct cc_device | |
478 | * | |
de3dc572 | 479 | * Returns: struct zfcp_adapter* |
1da177e4 LT |
480 | * Enqueues an adapter at the end of the adapter list in the driver data. |
481 | * All adapter internal structures are set up. | |
482 | * Proc-fs entries are also created. | |
1da177e4 | 483 | */ |
de3dc572 | 484 | struct zfcp_adapter *zfcp_adapter_enqueue(struct ccw_device *ccw_device) |
1da177e4 | 485 | { |
1da177e4 LT |
486 | struct zfcp_adapter *adapter; |
487 | ||
f3450c7b | 488 | if (!get_device(&ccw_device->dev)) |
de3dc572 | 489 | return ERR_PTR(-ENODEV); |
1da177e4 | 490 | |
317e6b65 | 491 | adapter = kzalloc(sizeof(struct zfcp_adapter), GFP_KERNEL); |
f3450c7b SS |
492 | if (!adapter) { |
493 | put_device(&ccw_device->dev); | |
de3dc572 | 494 | return ERR_PTR(-ENOMEM); |
f3450c7b SS |
495 | } |
496 | ||
497 | kref_init(&adapter->ref); | |
1da177e4 LT |
498 | |
499 | ccw_device->handler = NULL; | |
1da177e4 | 500 | adapter->ccw_device = ccw_device; |
f3450c7b SS |
501 | |
502 | INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler); | |
9eae07ef | 503 | INIT_WORK(&adapter->scan_work, zfcp_fc_scan_ports); |
1da177e4 | 504 | |
d5a282a1 | 505 | if (zfcp_qdio_setup(adapter)) |
f3450c7b | 506 | goto failed; |
1da177e4 | 507 | |
00bab910 | 508 | if (zfcp_allocate_low_mem_buffers(adapter)) |
f3450c7b | 509 | goto failed; |
1da177e4 | 510 | |
b6bd2fb9 CS |
511 | adapter->req_list = zfcp_reqlist_alloc(); |
512 | if (!adapter->req_list) | |
f3450c7b | 513 | goto failed; |
317e6b65 | 514 | |
5771710b | 515 | if (zfcp_dbf_adapter_register(adapter)) |
f3450c7b | 516 | goto failed; |
317e6b65 | 517 | |
4544683a | 518 | if (zfcp_setup_adapter_work_queue(adapter)) |
f3450c7b | 519 | goto failed; |
4544683a | 520 | |
d5a282a1 | 521 | if (zfcp_fc_gs_setup(adapter)) |
f3450c7b | 522 | goto failed; |
d5a282a1 | 523 | |
ecf0c772 SS |
524 | rwlock_init(&adapter->port_list_lock); |
525 | INIT_LIST_HEAD(&adapter->port_list); | |
526 | ||
347c6a96 | 527 | init_waitqueue_head(&adapter->erp_ready_wq); |
317e6b65 | 528 | init_waitqueue_head(&adapter->erp_done_wqh); |
1da177e4 | 529 | |
317e6b65 SS |
530 | INIT_LIST_HEAD(&adapter->erp_ready_head); |
531 | INIT_LIST_HEAD(&adapter->erp_running_head); | |
1da177e4 | 532 | |
c48a29d0 | 533 | rwlock_init(&adapter->erp_lock); |
1da177e4 LT |
534 | rwlock_init(&adapter->abort_lock); |
535 | ||
143bb6bf | 536 | if (zfcp_erp_thread_setup(adapter)) |
f3450c7b | 537 | goto failed; |
1da177e4 | 538 | |
bd43a42b CS |
539 | adapter->service_level.seq_print = zfcp_print_sl; |
540 | ||
1da177e4 LT |
541 | dev_set_drvdata(&ccw_device->dev, adapter); |
542 | ||
60221920 SS |
543 | if (sysfs_create_group(&ccw_device->dev.kobj, |
544 | &zfcp_sysfs_adapter_attrs)) | |
f3450c7b | 545 | goto failed; |
1da177e4 | 546 | |
1d3aab08 | 547 | if (!zfcp_adapter_scsi_register(adapter)) |
de3dc572 | 548 | return adapter; |
1da177e4 | 549 | |
f3450c7b | 550 | failed: |
de3dc572 SS |
551 | zfcp_adapter_unregister(adapter); |
552 | return ERR_PTR(-ENOMEM); | |
553 | } | |
554 | ||
555 | void zfcp_adapter_unregister(struct zfcp_adapter *adapter) | |
556 | { | |
557 | struct ccw_device *cdev = adapter->ccw_device; | |
558 | ||
559 | cancel_work_sync(&adapter->scan_work); | |
560 | cancel_work_sync(&adapter->stat_work); | |
561 | zfcp_destroy_adapter_work_queue(adapter); | |
562 | ||
563 | zfcp_fc_wka_ports_force_offline(adapter->gs); | |
564 | zfcp_adapter_scsi_unregister(adapter); | |
565 | sysfs_remove_group(&cdev->dev.kobj, &zfcp_sysfs_adapter_attrs); | |
566 | ||
567 | zfcp_erp_thread_kill(adapter); | |
568 | zfcp_dbf_adapter_unregister(adapter->dbf); | |
569 | zfcp_qdio_destroy(adapter->qdio); | |
570 | ||
571 | zfcp_ccw_adapter_put(adapter); /* final put to release */ | |
1da177e4 LT |
572 | } |
573 | ||
317e6b65 | 574 | /** |
f3450c7b SS |
575 | * zfcp_adapter_release - remove the adapter from the resource list |
576 | * @ref: pointer to struct kref | |
1da177e4 | 577 | * locks: adapter list write lock is assumed to be held by caller |
1da177e4 | 578 | */ |
f3450c7b | 579 | void zfcp_adapter_release(struct kref *ref) |
1da177e4 | 580 | { |
f3450c7b SS |
581 | struct zfcp_adapter *adapter = container_of(ref, struct zfcp_adapter, |
582 | ref); | |
de3dc572 | 583 | struct ccw_device *cdev = adapter->ccw_device; |
1da177e4 | 584 | |
f3450c7b | 585 | dev_set_drvdata(&adapter->ccw_device->dev, NULL); |
d5a282a1 | 586 | zfcp_fc_gs_destroy(adapter); |
1da177e4 | 587 | zfcp_free_low_mem_buffers(adapter); |
317e6b65 | 588 | kfree(adapter->req_list); |
f6cd94b1 AH |
589 | kfree(adapter->fc_stats); |
590 | kfree(adapter->stats_reset_data); | |
1da177e4 | 591 | kfree(adapter); |
de3dc572 | 592 | put_device(&cdev->dev); |
f3450c7b SS |
593 | } |
594 | ||
595 | /** | |
596 | * zfcp_device_unregister - remove port, unit from system | |
597 | * @dev: reference to device which is to be removed | |
598 | * @grp: related reference to attribute group | |
599 | * | |
600 | * Helper function to unregister port, unit from system | |
601 | */ | |
602 | void zfcp_device_unregister(struct device *dev, | |
603 | const struct attribute_group *grp) | |
604 | { | |
605 | sysfs_remove_group(&dev->kobj, grp); | |
606 | device_unregister(dev); | |
1da177e4 LT |
607 | } |
608 | ||
f3450c7b | 609 | static void zfcp_port_release(struct device *dev) |
60221920 | 610 | { |
615f59e0 | 611 | struct zfcp_port *port = container_of(dev, struct zfcp_port, dev); |
f3450c7b | 612 | |
de3dc572 | 613 | zfcp_ccw_adapter_put(port->adapter); |
f3450c7b | 614 | kfree(port); |
60221920 SS |
615 | } |
616 | ||
1da177e4 LT |
617 | /** |
618 | * zfcp_port_enqueue - enqueue port to port list of adapter | |
619 | * @adapter: adapter where remote port is added | |
620 | * @wwpn: WWPN of the remote port to be enqueued | |
621 | * @status: initial status for the port | |
622 | * @d_id: destination id of the remote port to be enqueued | |
317e6b65 | 623 | * Returns: pointer to enqueued port on success, ERR_PTR on error |
1da177e4 LT |
624 | * |
625 | * All port internal structures are set up and the sysfs entry is generated. | |
626 | * d_id is used to enqueue ports with a well known address like the Directory | |
627 | * Service for nameserver lookup. | |
628 | */ | |
7ba58c9c | 629 | struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *adapter, u64 wwpn, |
317e6b65 | 630 | u32 status, u32 d_id) |
1da177e4 | 631 | { |
3859f6a2 | 632 | struct zfcp_port *port; |
f3450c7b SS |
633 | int retval = -ENOMEM; |
634 | ||
635 | kref_get(&adapter->ref); | |
0fac3f47 | 636 | |
ecf0c772 SS |
637 | port = zfcp_get_port_by_wwpn(adapter, wwpn); |
638 | if (port) { | |
615f59e0 | 639 | put_device(&port->dev); |
f3450c7b SS |
640 | retval = -EEXIST; |
641 | goto err_out; | |
0fac3f47 | 642 | } |
1da177e4 | 643 | |
317e6b65 | 644 | port = kzalloc(sizeof(struct zfcp_port), GFP_KERNEL); |
1da177e4 | 645 | if (!port) |
f3450c7b | 646 | goto err_out; |
1da177e4 | 647 | |
ecf0c772 SS |
648 | rwlock_init(&port->unit_list_lock); |
649 | INIT_LIST_HEAD(&port->unit_list); | |
650 | ||
799b76d0 | 651 | INIT_WORK(&port->gid_pn_work, zfcp_fc_port_did_lookup); |
8fdf30d5 | 652 | INIT_WORK(&port->test_link_work, zfcp_fc_link_test_work); |
a2fa0aed | 653 | INIT_WORK(&port->rport_work, zfcp_scsi_rport_work); |
1da177e4 LT |
654 | |
655 | port->adapter = adapter; | |
317e6b65 SS |
656 | port->d_id = d_id; |
657 | port->wwpn = wwpn; | |
a2fa0aed | 658 | port->rport_task = RPORT_NONE; |
615f59e0 CS |
659 | port->dev.parent = &adapter->ccw_device->dev; |
660 | port->dev.release = zfcp_port_release; | |
1da177e4 | 661 | |
615f59e0 | 662 | if (dev_set_name(&port->dev, "0x%016llx", (unsigned long long)wwpn)) { |
0fac3f47 | 663 | kfree(port); |
f3450c7b | 664 | goto err_out; |
0fac3f47 | 665 | } |
f3450c7b | 666 | retval = -EINVAL; |
1da177e4 | 667 | |
615f59e0 CS |
668 | if (device_register(&port->dev)) { |
669 | put_device(&port->dev); | |
f3450c7b | 670 | goto err_out; |
f4395b65 | 671 | } |
1da177e4 | 672 | |
615f59e0 | 673 | if (sysfs_create_group(&port->dev.kobj, |
f3450c7b SS |
674 | &zfcp_sysfs_port_attrs)) |
675 | goto err_out_put; | |
1da177e4 | 676 | |
ecf0c772 SS |
677 | write_lock_irq(&adapter->port_list_lock); |
678 | list_add_tail(&port->list, &adapter->port_list); | |
679 | write_unlock_irq(&adapter->port_list_lock); | |
680 | ||
6b183334 | 681 | atomic_set_mask(status | ZFCP_STATUS_COMMON_RUNNING, &port->status); |
317e6b65 | 682 | |
1da177e4 | 683 | return port; |
1da177e4 | 684 | |
f3450c7b | 685 | err_out_put: |
615f59e0 | 686 | device_unregister(&port->dev); |
f3450c7b | 687 | err_out: |
de3dc572 | 688 | zfcp_ccw_adapter_put(adapter); |
f3450c7b | 689 | return ERR_PTR(retval); |
1da177e4 LT |
690 | } |
691 | ||
317e6b65 SS |
692 | /** |
693 | * zfcp_sg_free_table - free memory used by scatterlists | |
694 | * @sg: pointer to scatterlist | |
695 | * @count: number of scatterlist which are to be free'ed | |
696 | * the scatterlist are expected to reference pages always | |
697 | */ | |
45633fdc CS |
698 | void zfcp_sg_free_table(struct scatterlist *sg, int count) |
699 | { | |
700 | int i; | |
701 | ||
702 | for (i = 0; i < count; i++, sg++) | |
703 | if (sg) | |
704 | free_page((unsigned long) sg_virt(sg)); | |
705 | else | |
706 | break; | |
707 | } | |
708 | ||
317e6b65 SS |
709 | /** |
710 | * zfcp_sg_setup_table - init scatterlist and allocate, assign buffers | |
711 | * @sg: pointer to struct scatterlist | |
712 | * @count: number of scatterlists which should be assigned with buffers | |
713 | * of size page | |
714 | * | |
715 | * Returns: 0 on success, -ENOMEM otherwise | |
716 | */ | |
45633fdc CS |
717 | int zfcp_sg_setup_table(struct scatterlist *sg, int count) |
718 | { | |
719 | void *addr; | |
720 | int i; | |
721 | ||
722 | sg_init_table(sg, count); | |
723 | for (i = 0; i < count; i++, sg++) { | |
724 | addr = (void *) get_zeroed_page(GFP_KERNEL); | |
725 | if (!addr) { | |
726 | zfcp_sg_free_table(sg, i); | |
727 | return -ENOMEM; | |
728 | } | |
729 | sg_set_buf(sg, addr, PAGE_SIZE); | |
730 | } | |
731 | return 0; | |
732 | } |