Commit | Line | Data |
---|---|---|
41fa2ada | 1 | /* |
553448f6 | 2 | * zfcp device driver |
1da177e4 | 3 | * |
553448f6 | 4 | * Interface to Linux SCSI midlayer. |
41fa2ada | 5 | * |
a2fa0aed | 6 | * Copyright IBM Corporation 2002, 2009 |
1da177e4 LT |
7 | */ |
8 | ||
ecf39d42 CS |
9 | #define KMSG_COMPONENT "zfcp" |
10 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
11 | ||
1da177e4 | 12 | #include "zfcp_ext.h" |
5f852be9 | 13 | #include <asm/atomic.h> |
1da177e4 | 14 | |
1da177e4 | 15 | /* Find start of Sense Information in FCP response unit*/ |
f76af7d7 | 16 | char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu) |
1da177e4 LT |
17 | { |
18 | char *fcp_sns_info_ptr; | |
19 | ||
f76af7d7 | 20 | fcp_sns_info_ptr = (unsigned char *) &fcp_rsp_iu[1]; |
1da177e4 | 21 | if (fcp_rsp_iu->validity.bits.fcp_rsp_len_valid) |
f76af7d7 | 22 | fcp_sns_info_ptr += fcp_rsp_iu->fcp_rsp_len; |
1da177e4 LT |
23 | |
24 | return fcp_sns_info_ptr; | |
25 | } | |
26 | ||
f6c0e7a7 | 27 | static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) |
1da177e4 LT |
28 | { |
29 | struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata; | |
26816f1c | 30 | unit->device = NULL; |
26816f1c | 31 | zfcp_unit_put(unit); |
1da177e4 LT |
32 | } |
33 | ||
f76af7d7 | 34 | static int zfcp_scsi_slave_configure(struct scsi_device *sdp) |
1da177e4 LT |
35 | { |
36 | if (sdp->tagged_supported) | |
f76af7d7 | 37 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, 32); |
1da177e4 LT |
38 | else |
39 | scsi_adjust_queue_depth(sdp, 0, 1); | |
40 | return 0; | |
41 | } | |
42 | ||
f76af7d7 | 43 | static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) |
1da177e4 | 44 | { |
feac6a07 | 45 | set_host_byte(scpnt, result); |
8a36e453 MS |
46 | if ((scpnt->device != NULL) && (scpnt->device->host != NULL)) |
47 | zfcp_scsi_dbf_event_result("fail", 4, | |
48 | (struct zfcp_adapter*) scpnt->device->host->hostdata[0], | |
ed829ad6 | 49 | scpnt, NULL); |
1da177e4 LT |
50 | /* return directly */ |
51 | scpnt->scsi_done(scpnt); | |
52 | } | |
53 | ||
f76af7d7 MP |
54 | static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, |
55 | void (*done) (struct scsi_cmnd *)) | |
1da177e4 LT |
56 | { |
57 | struct zfcp_unit *unit; | |
58 | struct zfcp_adapter *adapter; | |
a2fa0aed CS |
59 | int status, scsi_result, ret; |
60 | struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); | |
1da177e4 LT |
61 | |
62 | /* reset the status for this request */ | |
63 | scpnt->result = 0; | |
64 | scpnt->host_scribble = NULL; | |
65 | scpnt->scsi_done = done; | |
66 | ||
67 | /* | |
68 | * figure out adapter and target device | |
69 | * (stored there by zfcp_scsi_slave_alloc) | |
70 | */ | |
71 | adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; | |
f76af7d7 MP |
72 | unit = scpnt->device->hostdata; |
73 | ||
74 | BUG_ON(!adapter || (adapter != unit->port->adapter)); | |
75 | BUG_ON(!scpnt->scsi_done); | |
76 | ||
77 | if (unlikely(!unit)) { | |
78 | zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); | |
79 | return 0; | |
80 | } | |
81 | ||
a2fa0aed CS |
82 | scsi_result = fc_remote_port_chkready(rport); |
83 | if (unlikely(scsi_result)) { | |
84 | scpnt->result = scsi_result; | |
85 | zfcp_scsi_dbf_event_result("fail", 4, adapter, scpnt, NULL); | |
86 | scpnt->scsi_done(scpnt); | |
87 | return 0; | |
88 | } | |
89 | ||
f76af7d7 MP |
90 | status = atomic_read(&unit->status); |
91 | if (unlikely((status & ZFCP_STATUS_COMMON_ERP_FAILED) || | |
92 | !(status & ZFCP_STATUS_COMMON_RUNNING))) { | |
93 | zfcp_scsi_command_fail(scpnt, DID_ERROR); | |
94 | return 0;; | |
95 | } | |
96 | ||
63caf367 | 97 | ret = zfcp_fsf_send_fcp_command_task(unit, scpnt); |
f76af7d7 | 98 | if (unlikely(ret == -EBUSY)) |
f7a65e92 | 99 | return SCSI_MLQUEUE_DEVICE_BUSY; |
f76af7d7 MP |
100 | else if (unlikely(ret < 0)) |
101 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 102 | |
f76af7d7 | 103 | return ret; |
1da177e4 LT |
104 | } |
105 | ||
f76af7d7 MP |
106 | static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter, |
107 | int channel, unsigned int id, | |
108 | unsigned int lun) | |
1da177e4 LT |
109 | { |
110 | struct zfcp_port *port; | |
f76af7d7 | 111 | struct zfcp_unit *unit; |
0406289e | 112 | int scsi_lun; |
1da177e4 LT |
113 | |
114 | list_for_each_entry(port, &adapter->port_list_head, list) { | |
3859f6a2 | 115 | if (!port->rport || (id != port->rport->scsi_target_id)) |
1da177e4 | 116 | continue; |
0406289e CS |
117 | list_for_each_entry(unit, &port->unit_list_head, list) { |
118 | scsi_lun = scsilun_to_int( | |
119 | (struct scsi_lun *)&unit->fcp_lun); | |
120 | if (lun == scsi_lun) | |
f76af7d7 | 121 | return unit; |
0406289e | 122 | } |
1da177e4 | 123 | } |
f76af7d7 MP |
124 | |
125 | return NULL; | |
126 | } | |
127 | ||
128 | static int zfcp_scsi_slave_alloc(struct scsi_device *sdp) | |
129 | { | |
130 | struct zfcp_adapter *adapter; | |
131 | struct zfcp_unit *unit; | |
132 | unsigned long flags; | |
133 | int retval = -ENXIO; | |
134 | ||
135 | adapter = (struct zfcp_adapter *) sdp->host->hostdata[0]; | |
136 | if (!adapter) | |
137 | goto out; | |
138 | ||
139 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
140 | unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun); | |
86f8a1b4 | 141 | if (unit) { |
f76af7d7 MP |
142 | sdp->hostdata = unit; |
143 | unit->device = sdp; | |
144 | zfcp_unit_get(unit); | |
145 | retval = 0; | |
146 | } | |
147 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
148 | out: | |
1da177e4 LT |
149 | return retval; |
150 | } | |
151 | ||
2b67fc46 | 152 | static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 153 | { |
63caf367 CS |
154 | struct Scsi_Host *scsi_host = scpnt->device->host; |
155 | struct zfcp_adapter *adapter = | |
156 | (struct zfcp_adapter *) scsi_host->hostdata[0]; | |
157 | struct zfcp_unit *unit = scpnt->device->hostdata; | |
158 | struct zfcp_fsf_req *old_req, *abrt_req; | |
1da177e4 | 159 | unsigned long flags; |
f76af7d7 | 160 | unsigned long old_req_id = (unsigned long) scpnt->host_scribble; |
4eff4a36 | 161 | int retval = SUCCESS; |
63caf367 | 162 | int retry = 3; |
1da177e4 | 163 | |
059c97d0 | 164 | /* avoid race condition between late normal completion and abort */ |
1da177e4 LT |
165 | write_lock_irqsave(&adapter->abort_lock, flags); |
166 | ||
4eff4a36 | 167 | spin_lock(&adapter->req_list_lock); |
63caf367 | 168 | old_req = zfcp_reqlist_find(adapter, old_req_id); |
4eff4a36 | 169 | spin_unlock(&adapter->req_list_lock); |
63caf367 | 170 | if (!old_req) { |
1da177e4 | 171 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
63caf367 CS |
172 | zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, |
173 | old_req_id); | |
174 | return SUCCESS; | |
1da177e4 | 175 | } |
63caf367 | 176 | old_req->data = NULL; |
1da177e4 | 177 | |
4eff4a36 | 178 | /* don't access old fsf_req after releasing the abort_lock */ |
1da177e4 | 179 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
4eff4a36 | 180 | |
63caf367 CS |
181 | while (retry--) { |
182 | abrt_req = zfcp_fsf_abort_fcp_command(old_req_id, unit); | |
183 | if (abrt_req) | |
184 | break; | |
185 | ||
186 | zfcp_erp_wait(adapter); | |
187 | if (!(atomic_read(&adapter->status) & | |
188 | ZFCP_STATUS_COMMON_RUNNING)) { | |
189 | zfcp_scsi_dbf_event_abort("nres", adapter, scpnt, NULL, | |
190 | old_req_id); | |
191 | return SUCCESS; | |
192 | } | |
1da177e4 | 193 | } |
63caf367 CS |
194 | if (!abrt_req) |
195 | return FAILED; | |
1da177e4 | 196 | |
63caf367 CS |
197 | wait_event(abrt_req->completion_wq, |
198 | abrt_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); | |
059c97d0 | 199 | |
63caf367 CS |
200 | if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) |
201 | zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, abrt_req, 0); | |
202 | else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) | |
203 | zfcp_scsi_dbf_event_abort("lte2", adapter, scpnt, abrt_req, 0); | |
204 | else { | |
205 | zfcp_scsi_dbf_event_abort("fail", adapter, scpnt, abrt_req, 0); | |
1da177e4 | 206 | retval = FAILED; |
1da177e4 | 207 | } |
63caf367 | 208 | zfcp_fsf_req_free(abrt_req); |
f76af7d7 | 209 | return retval; |
1da177e4 LT |
210 | } |
211 | ||
63caf367 | 212 | static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) |
1da177e4 | 213 | { |
63caf367 | 214 | struct zfcp_unit *unit = scpnt->device->hostdata; |
1da177e4 | 215 | struct zfcp_adapter *adapter = unit->port->adapter; |
1da177e4 | 216 | struct zfcp_fsf_req *fsf_req; |
f76af7d7 | 217 | int retval = SUCCESS; |
63caf367 CS |
218 | int retry = 3; |
219 | ||
220 | while (retry--) { | |
221 | fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags); | |
222 | if (fsf_req) | |
223 | break; | |
224 | ||
225 | zfcp_erp_wait(adapter); | |
226 | if (!(atomic_read(&adapter->status) & | |
227 | ZFCP_STATUS_COMMON_RUNNING)) { | |
228 | zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit, | |
229 | scpnt); | |
230 | return SUCCESS; | |
231 | } | |
1da177e4 | 232 | } |
63caf367 CS |
233 | if (!fsf_req) |
234 | return FAILED; | |
1da177e4 | 235 | |
63caf367 CS |
236 | wait_event(fsf_req->completion_wq, |
237 | fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); | |
77eb1699 | 238 | |
8a36e453 MS |
239 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { |
240 | zfcp_scsi_dbf_event_devreset("fail", tm_flags, unit, scpnt); | |
f76af7d7 | 241 | retval = FAILED; |
8a36e453 MS |
242 | } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) { |
243 | zfcp_scsi_dbf_event_devreset("nsup", tm_flags, unit, scpnt); | |
f76af7d7 | 244 | retval = FAILED; |
8a36e453 MS |
245 | } else |
246 | zfcp_scsi_dbf_event_devreset("okay", tm_flags, unit, scpnt); | |
77eb1699 AH |
247 | |
248 | zfcp_fsf_req_free(fsf_req); | |
1da177e4 LT |
249 | return retval; |
250 | } | |
251 | ||
f76af7d7 MP |
252 | static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) |
253 | { | |
63caf367 | 254 | return zfcp_task_mgmt_function(scpnt, FCP_LOGICAL_UNIT_RESET); |
f76af7d7 MP |
255 | } |
256 | ||
257 | static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) | |
258 | { | |
63caf367 | 259 | return zfcp_task_mgmt_function(scpnt, FCP_TARGET_RESET); |
f76af7d7 MP |
260 | } |
261 | ||
2b67fc46 | 262 | static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 263 | { |
63caf367 CS |
264 | struct zfcp_unit *unit = scpnt->device->hostdata; |
265 | struct zfcp_adapter *adapter = unit->port->adapter; | |
1da177e4 | 266 | |
5ffd51a5 | 267 | zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt); |
81654286 | 268 | zfcp_erp_wait(adapter); |
1da177e4 | 269 | |
810f1e3e | 270 | return SUCCESS; |
1da177e4 LT |
271 | } |
272 | ||
f76af7d7 | 273 | int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) |
1da177e4 | 274 | { |
f76af7d7 | 275 | struct ccw_dev_id dev_id; |
1da177e4 | 276 | |
9f28745a | 277 | if (adapter->scsi_host) |
f76af7d7 | 278 | return 0; |
9f28745a | 279 | |
f76af7d7 | 280 | ccw_device_get_id(adapter->ccw_device, &dev_id); |
1da177e4 LT |
281 | /* register adapter as SCSI host with mid layer of SCSI stack */ |
282 | adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template, | |
283 | sizeof (struct zfcp_adapter *)); | |
284 | if (!adapter->scsi_host) { | |
553448f6 | 285 | dev_err(&adapter->ccw_device->dev, |
ff3b24fa CS |
286 | "Registering the FCP device with the " |
287 | "SCSI stack failed\n"); | |
f76af7d7 | 288 | return -EIO; |
1da177e4 | 289 | } |
1da177e4 LT |
290 | |
291 | /* tell the SCSI stack some characteristics of this adapter */ | |
292 | adapter->scsi_host->max_id = 1; | |
293 | adapter->scsi_host->max_lun = 1; | |
294 | adapter->scsi_host->max_channel = 0; | |
f76af7d7 MP |
295 | adapter->scsi_host->unique_id = dev_id.devno; |
296 | adapter->scsi_host->max_cmd_len = 255; | |
dd52e0ea | 297 | adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; |
1da177e4 | 298 | |
1da177e4 LT |
299 | adapter->scsi_host->hostdata[0] = (unsigned long) adapter; |
300 | ||
301 | if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { | |
302 | scsi_host_put(adapter->scsi_host); | |
f76af7d7 | 303 | return -EIO; |
1da177e4 | 304 | } |
f76af7d7 MP |
305 | |
306 | return 0; | |
1da177e4 LT |
307 | } |
308 | ||
f76af7d7 | 309 | void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) |
1da177e4 LT |
310 | { |
311 | struct Scsi_Host *shost; | |
13e1e1f0 | 312 | struct zfcp_port *port; |
1da177e4 LT |
313 | |
314 | shost = adapter->scsi_host; | |
315 | if (!shost) | |
316 | return; | |
f76af7d7 | 317 | |
13e1e1f0 AH |
318 | read_lock_irq(&zfcp_data.config_lock); |
319 | list_for_each_entry(port, &adapter->port_list_head, list) | |
320 | if (port->rport) | |
321 | port->rport = NULL; | |
f76af7d7 | 322 | |
13e1e1f0 | 323 | read_unlock_irq(&zfcp_data.config_lock); |
3859f6a2 | 324 | fc_remove_host(shost); |
1da177e4 LT |
325 | scsi_remove_host(shost); |
326 | scsi_host_put(shost); | |
327 | adapter->scsi_host = NULL; | |
1da177e4 LT |
328 | |
329 | return; | |
330 | } | |
331 | ||
f6cd94b1 AH |
332 | static struct fc_host_statistics* |
333 | zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) | |
1da177e4 | 334 | { |
f6cd94b1 | 335 | struct fc_host_statistics *fc_stats; |
1da177e4 | 336 | |
f6cd94b1 AH |
337 | if (!adapter->fc_stats) { |
338 | fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); | |
339 | if (!fc_stats) | |
340 | return NULL; | |
341 | adapter->fc_stats = fc_stats; /* freed in adater_dequeue */ | |
342 | } | |
343 | memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); | |
344 | return adapter->fc_stats; | |
1da177e4 LT |
345 | } |
346 | ||
f76af7d7 MP |
347 | static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, |
348 | struct fsf_qtcb_bottom_port *data, | |
349 | struct fsf_qtcb_bottom_port *old) | |
1da177e4 | 350 | { |
f76af7d7 MP |
351 | fc_stats->seconds_since_last_reset = |
352 | data->seconds_since_last_reset - old->seconds_since_last_reset; | |
f6cd94b1 AH |
353 | fc_stats->tx_frames = data->tx_frames - old->tx_frames; |
354 | fc_stats->tx_words = data->tx_words - old->tx_words; | |
355 | fc_stats->rx_frames = data->rx_frames - old->rx_frames; | |
356 | fc_stats->rx_words = data->rx_words - old->rx_words; | |
357 | fc_stats->lip_count = data->lip - old->lip; | |
358 | fc_stats->nos_count = data->nos - old->nos; | |
359 | fc_stats->error_frames = data->error_frames - old->error_frames; | |
360 | fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; | |
361 | fc_stats->link_failure_count = data->link_failure - old->link_failure; | |
362 | fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; | |
f76af7d7 MP |
363 | fc_stats->loss_of_signal_count = |
364 | data->loss_of_signal - old->loss_of_signal; | |
365 | fc_stats->prim_seq_protocol_err_count = | |
366 | data->psp_error_counts - old->psp_error_counts; | |
367 | fc_stats->invalid_tx_word_count = | |
368 | data->invalid_tx_words - old->invalid_tx_words; | |
f6cd94b1 | 369 | fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; |
f76af7d7 MP |
370 | fc_stats->fcp_input_requests = |
371 | data->input_requests - old->input_requests; | |
372 | fc_stats->fcp_output_requests = | |
373 | data->output_requests - old->output_requests; | |
374 | fc_stats->fcp_control_requests = | |
375 | data->control_requests - old->control_requests; | |
f6cd94b1 AH |
376 | fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; |
377 | fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; | |
378 | } | |
1da177e4 | 379 | |
f76af7d7 MP |
380 | static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, |
381 | struct fsf_qtcb_bottom_port *data) | |
f6cd94b1 AH |
382 | { |
383 | fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; | |
384 | fc_stats->tx_frames = data->tx_frames; | |
385 | fc_stats->tx_words = data->tx_words; | |
386 | fc_stats->rx_frames = data->rx_frames; | |
387 | fc_stats->rx_words = data->rx_words; | |
388 | fc_stats->lip_count = data->lip; | |
389 | fc_stats->nos_count = data->nos; | |
390 | fc_stats->error_frames = data->error_frames; | |
391 | fc_stats->dumped_frames = data->dumped_frames; | |
392 | fc_stats->link_failure_count = data->link_failure; | |
393 | fc_stats->loss_of_sync_count = data->loss_of_sync; | |
394 | fc_stats->loss_of_signal_count = data->loss_of_signal; | |
395 | fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; | |
396 | fc_stats->invalid_tx_word_count = data->invalid_tx_words; | |
397 | fc_stats->invalid_crc_count = data->invalid_crcs; | |
398 | fc_stats->fcp_input_requests = data->input_requests; | |
399 | fc_stats->fcp_output_requests = data->output_requests; | |
400 | fc_stats->fcp_control_requests = data->control_requests; | |
401 | fc_stats->fcp_input_megabytes = data->input_mb; | |
402 | fc_stats->fcp_output_megabytes = data->output_mb; | |
403 | } | |
404 | ||
f76af7d7 | 405 | static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) |
f6cd94b1 AH |
406 | { |
407 | struct zfcp_adapter *adapter; | |
408 | struct fc_host_statistics *fc_stats; | |
409 | struct fsf_qtcb_bottom_port *data; | |
410 | int ret; | |
411 | ||
f76af7d7 | 412 | adapter = (struct zfcp_adapter *)host->hostdata[0]; |
f6cd94b1 AH |
413 | fc_stats = zfcp_init_fc_host_stats(adapter); |
414 | if (!fc_stats) | |
415 | return NULL; | |
416 | ||
ec4081c6 | 417 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
418 | if (!data) |
419 | return NULL; | |
f6cd94b1 | 420 | |
52ef11a7 | 421 | ret = zfcp_fsf_exchange_port_data_sync(adapter, data); |
f6cd94b1 AH |
422 | if (ret) { |
423 | kfree(data); | |
f76af7d7 | 424 | return NULL; |
f6cd94b1 AH |
425 | } |
426 | ||
427 | if (adapter->stats_reset && | |
428 | ((jiffies/HZ - adapter->stats_reset) < | |
f76af7d7 | 429 | data->seconds_since_last_reset)) |
f6cd94b1 AH |
430 | zfcp_adjust_fc_host_stats(fc_stats, data, |
431 | adapter->stats_reset_data); | |
f76af7d7 | 432 | else |
f6cd94b1 AH |
433 | zfcp_set_fc_host_stats(fc_stats, data); |
434 | ||
435 | kfree(data); | |
436 | return fc_stats; | |
1da177e4 LT |
437 | } |
438 | ||
f76af7d7 | 439 | static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) |
1da177e4 | 440 | { |
f6cd94b1 | 441 | struct zfcp_adapter *adapter; |
f76af7d7 | 442 | struct fsf_qtcb_bottom_port *data; |
f6cd94b1 | 443 | int ret; |
1da177e4 | 444 | |
f6cd94b1 | 445 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; |
ec4081c6 | 446 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
447 | if (!data) |
448 | return; | |
f6cd94b1 | 449 | |
52ef11a7 | 450 | ret = zfcp_fsf_exchange_port_data_sync(adapter, data); |
f76af7d7 | 451 | if (ret) |
83f6d6d7 | 452 | kfree(data); |
f76af7d7 | 453 | else { |
f6cd94b1 | 454 | adapter->stats_reset = jiffies/HZ; |
f76af7d7 | 455 | kfree(adapter->stats_reset_data); |
f6cd94b1 | 456 | adapter->stats_reset_data = data; /* finally freed in |
f76af7d7 | 457 | adapter_dequeue */ |
f6cd94b1 | 458 | } |
1da177e4 LT |
459 | } |
460 | ||
85a82392 SS |
461 | static void zfcp_get_host_port_state(struct Scsi_Host *shost) |
462 | { | |
463 | struct zfcp_adapter *adapter = | |
464 | (struct zfcp_adapter *)shost->hostdata[0]; | |
465 | int status = atomic_read(&adapter->status); | |
466 | ||
467 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && | |
468 | !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) | |
469 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
470 | else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) | |
471 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
472 | else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
473 | fc_host_port_state(shost) = FC_PORTSTATE_ERROR; | |
474 | else | |
475 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
476 | } | |
477 | ||
338151e0 AH |
478 | static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
479 | { | |
480 | rport->dev_loss_tmo = timeout; | |
481 | } | |
482 | ||
a2fa0aed CS |
483 | /** |
484 | * zfcp_scsi_dev_loss_tmo_callbk - Free any reference to rport | |
485 | * @rport: The rport that is about to be deleted. | |
486 | */ | |
487 | static void zfcp_scsi_dev_loss_tmo_callbk(struct fc_rport *rport) | |
488 | { | |
489 | struct zfcp_port *port = rport->dd_data; | |
490 | ||
491 | write_lock_irq(&zfcp_data.config_lock); | |
492 | port->rport = NULL; | |
493 | write_unlock_irq(&zfcp_data.config_lock); | |
494 | } | |
495 | ||
496 | /** | |
497 | * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport | |
498 | * @rport: The FC rport where to teminate I/O | |
499 | * | |
500 | * Abort all pending SCSI commands for a port by closing the | |
501 | * port. Using a reopen for avoids a conflict with a shutdown | |
502 | * overwriting a reopen. | |
503 | */ | |
504 | static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) | |
505 | { | |
506 | struct zfcp_port *port = rport->dd_data; | |
507 | ||
508 | zfcp_erp_port_reopen(port, 0, "sctrpi1", NULL); | |
509 | } | |
510 | ||
511 | static void zfcp_scsi_rport_register(struct zfcp_port *port) | |
512 | { | |
513 | struct fc_rport_identifiers ids; | |
514 | struct fc_rport *rport; | |
515 | ||
516 | ids.node_name = port->wwnn; | |
517 | ids.port_name = port->wwpn; | |
518 | ids.port_id = port->d_id; | |
519 | ids.roles = FC_RPORT_ROLE_FCP_TARGET; | |
520 | ||
521 | rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); | |
522 | if (!rport) { | |
523 | dev_err(&port->adapter->ccw_device->dev, | |
524 | "Registering port 0x%016Lx failed\n", | |
525 | (unsigned long long)port->wwpn); | |
526 | return; | |
527 | } | |
528 | ||
529 | rport->dd_data = port; | |
530 | rport->maxframe_size = port->maxframe_size; | |
531 | rport->supported_classes = port->supported_classes; | |
532 | port->rport = rport; | |
533 | } | |
534 | ||
535 | static void zfcp_scsi_rport_block(struct zfcp_port *port) | |
536 | { | |
537 | if (port->rport) | |
538 | fc_remote_port_delete(port->rport); | |
539 | } | |
540 | ||
541 | void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) | |
542 | { | |
543 | zfcp_port_get(port); | |
544 | port->rport_task = RPORT_ADD; | |
545 | ||
546 | if (!queue_work(zfcp_data.work_queue, &port->rport_work)) | |
547 | zfcp_port_put(port); | |
548 | } | |
549 | ||
550 | void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) | |
551 | { | |
552 | zfcp_port_get(port); | |
553 | port->rport_task = RPORT_DEL; | |
554 | ||
555 | if (!queue_work(zfcp_data.work_queue, &port->rport_work)) | |
556 | zfcp_port_put(port); | |
557 | } | |
558 | ||
559 | void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) | |
560 | { | |
561 | struct zfcp_port *port; | |
562 | ||
563 | list_for_each_entry(port, &adapter->port_list_head, list) | |
564 | zfcp_scsi_schedule_rport_block(port); | |
565 | } | |
566 | ||
567 | void zfcp_scsi_rport_work(struct work_struct *work) | |
568 | { | |
569 | struct zfcp_port *port = container_of(work, struct zfcp_port, | |
570 | rport_work); | |
571 | ||
572 | while (port->rport_task) { | |
573 | if (port->rport_task == RPORT_ADD) { | |
574 | port->rport_task = RPORT_NONE; | |
575 | zfcp_scsi_rport_register(port); | |
576 | } else { | |
577 | port->rport_task = RPORT_NONE; | |
578 | zfcp_scsi_rport_block(port); | |
579 | } | |
580 | } | |
581 | ||
582 | zfcp_port_put(port); | |
583 | } | |
584 | ||
585 | ||
1da177e4 | 586 | struct fc_function_template zfcp_transport_functions = { |
1da177e4 LT |
587 | .show_starget_port_id = 1, |
588 | .show_starget_port_name = 1, | |
589 | .show_starget_node_name = 1, | |
3859f6a2 | 590 | .show_rport_supported_classes = 1, |
75bfc283 | 591 | .show_rport_maxframe_size = 1, |
338151e0 | 592 | .show_rport_dev_loss_tmo = 1, |
3859f6a2 AH |
593 | .show_host_node_name = 1, |
594 | .show_host_port_name = 1, | |
ad757cdf | 595 | .show_host_permanent_port_name = 1, |
3859f6a2 | 596 | .show_host_supported_classes = 1, |
ad757cdf | 597 | .show_host_supported_speeds = 1, |
13e1e1f0 | 598 | .show_host_maxframe_size = 1, |
3859f6a2 | 599 | .show_host_serial_number = 1, |
f6cd94b1 AH |
600 | .get_fc_host_stats = zfcp_get_fc_host_stats, |
601 | .reset_fc_host_stats = zfcp_reset_fc_host_stats, | |
338151e0 | 602 | .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, |
85a82392 | 603 | .get_host_port_state = zfcp_get_host_port_state, |
a2fa0aed CS |
604 | .dev_loss_tmo_callbk = zfcp_scsi_dev_loss_tmo_callbk, |
605 | .terminate_rport_io = zfcp_scsi_terminate_rport_io, | |
85a82392 | 606 | .show_host_port_state = 1, |
f6cd94b1 AH |
607 | /* no functions registered for following dynamic attributes but |
608 | directly set by LLDD */ | |
ad757cdf | 609 | .show_host_port_type = 1, |
13e1e1f0 AH |
610 | .show_host_speed = 1, |
611 | .show_host_port_id = 1, | |
52ef11a7 | 612 | .disable_target_scan = 1, |
1da177e4 LT |
613 | }; |
614 | ||
f76af7d7 MP |
615 | struct zfcp_data zfcp_data = { |
616 | .scsi_host_template = { | |
617 | .name = "zfcp", | |
618 | .module = THIS_MODULE, | |
619 | .proc_name = "zfcp", | |
620 | .slave_alloc = zfcp_scsi_slave_alloc, | |
621 | .slave_configure = zfcp_scsi_slave_configure, | |
622 | .slave_destroy = zfcp_scsi_slave_destroy, | |
623 | .queuecommand = zfcp_scsi_queuecommand, | |
624 | .eh_abort_handler = zfcp_scsi_eh_abort_handler, | |
625 | .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, | |
626 | .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, | |
627 | .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, | |
628 | .can_queue = 4096, | |
629 | .this_id = -1, | |
630 | .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ, | |
631 | .cmd_per_lun = 1, | |
632 | .use_clustering = 1, | |
633 | .sdev_attrs = zfcp_sysfs_sdev_attrs, | |
634 | .max_sectors = (ZFCP_MAX_SBALES_PER_REQ * 8), | |
60221920 | 635 | .shost_attrs = zfcp_sysfs_shost_attrs, |
f76af7d7 MP |
636 | }, |
637 | }; |