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 | ||
5f852be9 | 12 | #include <asm/atomic.h> |
dcd20e23 CS |
13 | #include "zfcp_ext.h" |
14 | #include "zfcp_dbf.h" | |
1da177e4 | 15 | |
a40a1baf CS |
16 | static unsigned int default_depth = 32; |
17 | module_param_named(queue_depth, default_depth, uint, 0600); | |
18 | MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices"); | |
19 | ||
1da177e4 | 20 | /* Find start of Sense Information in FCP response unit*/ |
f76af7d7 | 21 | char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu) |
1da177e4 LT |
22 | { |
23 | char *fcp_sns_info_ptr; | |
24 | ||
f76af7d7 | 25 | fcp_sns_info_ptr = (unsigned char *) &fcp_rsp_iu[1]; |
1da177e4 | 26 | if (fcp_rsp_iu->validity.bits.fcp_rsp_len_valid) |
f76af7d7 | 27 | fcp_sns_info_ptr += fcp_rsp_iu->fcp_rsp_len; |
1da177e4 LT |
28 | |
29 | return fcp_sns_info_ptr; | |
30 | } | |
31 | ||
a40a1baf CS |
32 | static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth) |
33 | { | |
34 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
35 | return sdev->queue_depth; | |
36 | } | |
37 | ||
f6c0e7a7 | 38 | static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) |
1da177e4 LT |
39 | { |
40 | struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata; | |
26816f1c | 41 | unit->device = NULL; |
26816f1c | 42 | zfcp_unit_put(unit); |
1da177e4 LT |
43 | } |
44 | ||
f76af7d7 | 45 | static int zfcp_scsi_slave_configure(struct scsi_device *sdp) |
1da177e4 LT |
46 | { |
47 | if (sdp->tagged_supported) | |
a40a1baf | 48 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth); |
1da177e4 LT |
49 | else |
50 | scsi_adjust_queue_depth(sdp, 0, 1); | |
51 | return 0; | |
52 | } | |
53 | ||
f76af7d7 | 54 | static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) |
1da177e4 | 55 | { |
feac6a07 | 56 | set_host_byte(scpnt, result); |
8a36e453 MS |
57 | if ((scpnt->device != NULL) && (scpnt->device->host != NULL)) |
58 | zfcp_scsi_dbf_event_result("fail", 4, | |
59 | (struct zfcp_adapter*) scpnt->device->host->hostdata[0], | |
ed829ad6 | 60 | scpnt, NULL); |
1da177e4 LT |
61 | /* return directly */ |
62 | scpnt->scsi_done(scpnt); | |
63 | } | |
64 | ||
f76af7d7 MP |
65 | static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, |
66 | void (*done) (struct scsi_cmnd *)) | |
1da177e4 LT |
67 | { |
68 | struct zfcp_unit *unit; | |
69 | struct zfcp_adapter *adapter; | |
a2fa0aed CS |
70 | int status, scsi_result, ret; |
71 | struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); | |
1da177e4 LT |
72 | |
73 | /* reset the status for this request */ | |
74 | scpnt->result = 0; | |
75 | scpnt->host_scribble = NULL; | |
76 | scpnt->scsi_done = done; | |
77 | ||
78 | /* | |
79 | * figure out adapter and target device | |
80 | * (stored there by zfcp_scsi_slave_alloc) | |
81 | */ | |
82 | adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; | |
f76af7d7 MP |
83 | unit = scpnt->device->hostdata; |
84 | ||
85 | BUG_ON(!adapter || (adapter != unit->port->adapter)); | |
86 | BUG_ON(!scpnt->scsi_done); | |
87 | ||
88 | if (unlikely(!unit)) { | |
89 | zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); | |
90 | return 0; | |
91 | } | |
92 | ||
a2fa0aed CS |
93 | scsi_result = fc_remote_port_chkready(rport); |
94 | if (unlikely(scsi_result)) { | |
95 | scpnt->result = scsi_result; | |
96 | zfcp_scsi_dbf_event_result("fail", 4, adapter, scpnt, NULL); | |
97 | scpnt->scsi_done(scpnt); | |
98 | return 0; | |
99 | } | |
100 | ||
f76af7d7 MP |
101 | status = atomic_read(&unit->status); |
102 | if (unlikely((status & ZFCP_STATUS_COMMON_ERP_FAILED) || | |
103 | !(status & ZFCP_STATUS_COMMON_RUNNING))) { | |
104 | zfcp_scsi_command_fail(scpnt, DID_ERROR); | |
105 | return 0;; | |
106 | } | |
107 | ||
63caf367 | 108 | ret = zfcp_fsf_send_fcp_command_task(unit, scpnt); |
f76af7d7 | 109 | if (unlikely(ret == -EBUSY)) |
f7a65e92 | 110 | return SCSI_MLQUEUE_DEVICE_BUSY; |
f76af7d7 MP |
111 | else if (unlikely(ret < 0)) |
112 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 113 | |
f76af7d7 | 114 | return ret; |
1da177e4 LT |
115 | } |
116 | ||
f76af7d7 MP |
117 | static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter, |
118 | int channel, unsigned int id, | |
119 | unsigned int lun) | |
1da177e4 LT |
120 | { |
121 | struct zfcp_port *port; | |
f76af7d7 | 122 | struct zfcp_unit *unit; |
0406289e | 123 | int scsi_lun; |
1da177e4 LT |
124 | |
125 | list_for_each_entry(port, &adapter->port_list_head, list) { | |
3859f6a2 | 126 | if (!port->rport || (id != port->rport->scsi_target_id)) |
1da177e4 | 127 | continue; |
0406289e CS |
128 | list_for_each_entry(unit, &port->unit_list_head, list) { |
129 | scsi_lun = scsilun_to_int( | |
130 | (struct scsi_lun *)&unit->fcp_lun); | |
131 | if (lun == scsi_lun) | |
f76af7d7 | 132 | return unit; |
0406289e | 133 | } |
1da177e4 | 134 | } |
f76af7d7 MP |
135 | |
136 | return NULL; | |
137 | } | |
138 | ||
139 | static int zfcp_scsi_slave_alloc(struct scsi_device *sdp) | |
140 | { | |
141 | struct zfcp_adapter *adapter; | |
142 | struct zfcp_unit *unit; | |
143 | unsigned long flags; | |
144 | int retval = -ENXIO; | |
145 | ||
146 | adapter = (struct zfcp_adapter *) sdp->host->hostdata[0]; | |
147 | if (!adapter) | |
148 | goto out; | |
149 | ||
150 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
151 | unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun); | |
86f8a1b4 | 152 | if (unit) { |
f76af7d7 MP |
153 | sdp->hostdata = unit; |
154 | unit->device = sdp; | |
155 | zfcp_unit_get(unit); | |
156 | retval = 0; | |
157 | } | |
158 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
159 | out: | |
1da177e4 LT |
160 | return retval; |
161 | } | |
162 | ||
2b67fc46 | 163 | static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 164 | { |
63caf367 CS |
165 | struct Scsi_Host *scsi_host = scpnt->device->host; |
166 | struct zfcp_adapter *adapter = | |
167 | (struct zfcp_adapter *) scsi_host->hostdata[0]; | |
168 | struct zfcp_unit *unit = scpnt->device->hostdata; | |
169 | struct zfcp_fsf_req *old_req, *abrt_req; | |
1da177e4 | 170 | unsigned long flags; |
a11a52be | 171 | unsigned long old_reqid = (unsigned long) scpnt->host_scribble; |
4eff4a36 | 172 | int retval = SUCCESS; |
63caf367 | 173 | int retry = 3; |
a11a52be | 174 | char *dbf_tag; |
1da177e4 | 175 | |
059c97d0 | 176 | /* avoid race condition between late normal completion and abort */ |
1da177e4 LT |
177 | write_lock_irqsave(&adapter->abort_lock, flags); |
178 | ||
4eff4a36 | 179 | spin_lock(&adapter->req_list_lock); |
a11a52be | 180 | old_req = zfcp_reqlist_find(adapter, old_reqid); |
4eff4a36 | 181 | spin_unlock(&adapter->req_list_lock); |
63caf367 | 182 | if (!old_req) { |
1da177e4 | 183 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
63caf367 | 184 | zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, |
a11a52be | 185 | old_reqid); |
c6936e7f | 186 | return FAILED; /* completion could be in progress */ |
1da177e4 | 187 | } |
63caf367 | 188 | old_req->data = NULL; |
1da177e4 | 189 | |
4eff4a36 | 190 | /* don't access old fsf_req after releasing the abort_lock */ |
1da177e4 | 191 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
4eff4a36 | 192 | |
63caf367 | 193 | while (retry--) { |
a11a52be | 194 | abrt_req = zfcp_fsf_abort_fcp_command(old_reqid, unit); |
63caf367 CS |
195 | if (abrt_req) |
196 | break; | |
197 | ||
198 | zfcp_erp_wait(adapter); | |
199 | if (!(atomic_read(&adapter->status) & | |
200 | ZFCP_STATUS_COMMON_RUNNING)) { | |
201 | zfcp_scsi_dbf_event_abort("nres", adapter, scpnt, NULL, | |
a11a52be | 202 | old_reqid); |
63caf367 CS |
203 | return SUCCESS; |
204 | } | |
1da177e4 | 205 | } |
63caf367 CS |
206 | if (!abrt_req) |
207 | return FAILED; | |
1da177e4 | 208 | |
63caf367 CS |
209 | wait_event(abrt_req->completion_wq, |
210 | abrt_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); | |
059c97d0 | 211 | |
63caf367 | 212 | if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) |
a11a52be | 213 | dbf_tag = "okay"; |
63caf367 | 214 | else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) |
a11a52be | 215 | dbf_tag = "lte2"; |
63caf367 | 216 | else { |
a11a52be | 217 | dbf_tag = "fail"; |
1da177e4 | 218 | retval = FAILED; |
1da177e4 | 219 | } |
a11a52be | 220 | zfcp_scsi_dbf_event_abort(dbf_tag, adapter, scpnt, abrt_req, old_reqid); |
63caf367 | 221 | zfcp_fsf_req_free(abrt_req); |
f76af7d7 | 222 | return retval; |
1da177e4 LT |
223 | } |
224 | ||
63caf367 | 225 | static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) |
1da177e4 | 226 | { |
63caf367 | 227 | struct zfcp_unit *unit = scpnt->device->hostdata; |
1da177e4 | 228 | struct zfcp_adapter *adapter = unit->port->adapter; |
1da177e4 | 229 | struct zfcp_fsf_req *fsf_req; |
f76af7d7 | 230 | int retval = SUCCESS; |
63caf367 CS |
231 | int retry = 3; |
232 | ||
233 | while (retry--) { | |
234 | fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags); | |
235 | if (fsf_req) | |
236 | break; | |
237 | ||
238 | zfcp_erp_wait(adapter); | |
239 | if (!(atomic_read(&adapter->status) & | |
240 | ZFCP_STATUS_COMMON_RUNNING)) { | |
241 | zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit, | |
242 | scpnt); | |
243 | return SUCCESS; | |
244 | } | |
1da177e4 | 245 | } |
63caf367 CS |
246 | if (!fsf_req) |
247 | return FAILED; | |
1da177e4 | 248 | |
63caf367 CS |
249 | wait_event(fsf_req->completion_wq, |
250 | fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); | |
77eb1699 | 251 | |
8a36e453 MS |
252 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { |
253 | zfcp_scsi_dbf_event_devreset("fail", tm_flags, unit, scpnt); | |
f76af7d7 | 254 | retval = FAILED; |
8a36e453 MS |
255 | } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) { |
256 | zfcp_scsi_dbf_event_devreset("nsup", tm_flags, unit, scpnt); | |
f76af7d7 | 257 | retval = FAILED; |
8a36e453 MS |
258 | } else |
259 | zfcp_scsi_dbf_event_devreset("okay", tm_flags, unit, scpnt); | |
77eb1699 AH |
260 | |
261 | zfcp_fsf_req_free(fsf_req); | |
1da177e4 LT |
262 | return retval; |
263 | } | |
264 | ||
f76af7d7 MP |
265 | static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) |
266 | { | |
63caf367 | 267 | return zfcp_task_mgmt_function(scpnt, FCP_LOGICAL_UNIT_RESET); |
f76af7d7 MP |
268 | } |
269 | ||
270 | static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) | |
271 | { | |
63caf367 | 272 | return zfcp_task_mgmt_function(scpnt, FCP_TARGET_RESET); |
f76af7d7 MP |
273 | } |
274 | ||
2b67fc46 | 275 | static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 276 | { |
63caf367 CS |
277 | struct zfcp_unit *unit = scpnt->device->hostdata; |
278 | struct zfcp_adapter *adapter = unit->port->adapter; | |
1da177e4 | 279 | |
5ffd51a5 | 280 | zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt); |
81654286 | 281 | zfcp_erp_wait(adapter); |
1da177e4 | 282 | |
810f1e3e | 283 | return SUCCESS; |
1da177e4 LT |
284 | } |
285 | ||
f76af7d7 | 286 | int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) |
1da177e4 | 287 | { |
f76af7d7 | 288 | struct ccw_dev_id dev_id; |
1da177e4 | 289 | |
9f28745a | 290 | if (adapter->scsi_host) |
f76af7d7 | 291 | return 0; |
9f28745a | 292 | |
f76af7d7 | 293 | ccw_device_get_id(adapter->ccw_device, &dev_id); |
1da177e4 LT |
294 | /* register adapter as SCSI host with mid layer of SCSI stack */ |
295 | adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template, | |
296 | sizeof (struct zfcp_adapter *)); | |
297 | if (!adapter->scsi_host) { | |
553448f6 | 298 | dev_err(&adapter->ccw_device->dev, |
ff3b24fa CS |
299 | "Registering the FCP device with the " |
300 | "SCSI stack failed\n"); | |
f76af7d7 | 301 | return -EIO; |
1da177e4 | 302 | } |
1da177e4 LT |
303 | |
304 | /* tell the SCSI stack some characteristics of this adapter */ | |
305 | adapter->scsi_host->max_id = 1; | |
306 | adapter->scsi_host->max_lun = 1; | |
307 | adapter->scsi_host->max_channel = 0; | |
f76af7d7 MP |
308 | adapter->scsi_host->unique_id = dev_id.devno; |
309 | adapter->scsi_host->max_cmd_len = 255; | |
dd52e0ea | 310 | adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; |
1da177e4 | 311 | |
1da177e4 LT |
312 | adapter->scsi_host->hostdata[0] = (unsigned long) adapter; |
313 | ||
314 | if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { | |
315 | scsi_host_put(adapter->scsi_host); | |
f76af7d7 | 316 | return -EIO; |
1da177e4 | 317 | } |
f76af7d7 MP |
318 | |
319 | return 0; | |
1da177e4 LT |
320 | } |
321 | ||
f76af7d7 | 322 | void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) |
1da177e4 LT |
323 | { |
324 | struct Scsi_Host *shost; | |
13e1e1f0 | 325 | struct zfcp_port *port; |
1da177e4 LT |
326 | |
327 | shost = adapter->scsi_host; | |
328 | if (!shost) | |
329 | return; | |
f76af7d7 | 330 | |
13e1e1f0 AH |
331 | read_lock_irq(&zfcp_data.config_lock); |
332 | list_for_each_entry(port, &adapter->port_list_head, list) | |
333 | if (port->rport) | |
334 | port->rport = NULL; | |
f76af7d7 | 335 | |
13e1e1f0 | 336 | read_unlock_irq(&zfcp_data.config_lock); |
3859f6a2 | 337 | fc_remove_host(shost); |
1da177e4 LT |
338 | scsi_remove_host(shost); |
339 | scsi_host_put(shost); | |
340 | adapter->scsi_host = NULL; | |
1da177e4 LT |
341 | |
342 | return; | |
343 | } | |
344 | ||
f6cd94b1 AH |
345 | static struct fc_host_statistics* |
346 | zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) | |
1da177e4 | 347 | { |
f6cd94b1 | 348 | struct fc_host_statistics *fc_stats; |
1da177e4 | 349 | |
f6cd94b1 AH |
350 | if (!adapter->fc_stats) { |
351 | fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); | |
352 | if (!fc_stats) | |
353 | return NULL; | |
354 | adapter->fc_stats = fc_stats; /* freed in adater_dequeue */ | |
355 | } | |
356 | memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); | |
357 | return adapter->fc_stats; | |
1da177e4 LT |
358 | } |
359 | ||
f76af7d7 MP |
360 | static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, |
361 | struct fsf_qtcb_bottom_port *data, | |
362 | struct fsf_qtcb_bottom_port *old) | |
1da177e4 | 363 | { |
f76af7d7 MP |
364 | fc_stats->seconds_since_last_reset = |
365 | data->seconds_since_last_reset - old->seconds_since_last_reset; | |
f6cd94b1 AH |
366 | fc_stats->tx_frames = data->tx_frames - old->tx_frames; |
367 | fc_stats->tx_words = data->tx_words - old->tx_words; | |
368 | fc_stats->rx_frames = data->rx_frames - old->rx_frames; | |
369 | fc_stats->rx_words = data->rx_words - old->rx_words; | |
370 | fc_stats->lip_count = data->lip - old->lip; | |
371 | fc_stats->nos_count = data->nos - old->nos; | |
372 | fc_stats->error_frames = data->error_frames - old->error_frames; | |
373 | fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; | |
374 | fc_stats->link_failure_count = data->link_failure - old->link_failure; | |
375 | fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; | |
f76af7d7 MP |
376 | fc_stats->loss_of_signal_count = |
377 | data->loss_of_signal - old->loss_of_signal; | |
378 | fc_stats->prim_seq_protocol_err_count = | |
379 | data->psp_error_counts - old->psp_error_counts; | |
380 | fc_stats->invalid_tx_word_count = | |
381 | data->invalid_tx_words - old->invalid_tx_words; | |
f6cd94b1 | 382 | fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; |
f76af7d7 MP |
383 | fc_stats->fcp_input_requests = |
384 | data->input_requests - old->input_requests; | |
385 | fc_stats->fcp_output_requests = | |
386 | data->output_requests - old->output_requests; | |
387 | fc_stats->fcp_control_requests = | |
388 | data->control_requests - old->control_requests; | |
f6cd94b1 AH |
389 | fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; |
390 | fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; | |
391 | } | |
1da177e4 | 392 | |
f76af7d7 MP |
393 | static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, |
394 | struct fsf_qtcb_bottom_port *data) | |
f6cd94b1 AH |
395 | { |
396 | fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; | |
397 | fc_stats->tx_frames = data->tx_frames; | |
398 | fc_stats->tx_words = data->tx_words; | |
399 | fc_stats->rx_frames = data->rx_frames; | |
400 | fc_stats->rx_words = data->rx_words; | |
401 | fc_stats->lip_count = data->lip; | |
402 | fc_stats->nos_count = data->nos; | |
403 | fc_stats->error_frames = data->error_frames; | |
404 | fc_stats->dumped_frames = data->dumped_frames; | |
405 | fc_stats->link_failure_count = data->link_failure; | |
406 | fc_stats->loss_of_sync_count = data->loss_of_sync; | |
407 | fc_stats->loss_of_signal_count = data->loss_of_signal; | |
408 | fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; | |
409 | fc_stats->invalid_tx_word_count = data->invalid_tx_words; | |
410 | fc_stats->invalid_crc_count = data->invalid_crcs; | |
411 | fc_stats->fcp_input_requests = data->input_requests; | |
412 | fc_stats->fcp_output_requests = data->output_requests; | |
413 | fc_stats->fcp_control_requests = data->control_requests; | |
414 | fc_stats->fcp_input_megabytes = data->input_mb; | |
415 | fc_stats->fcp_output_megabytes = data->output_mb; | |
416 | } | |
417 | ||
f76af7d7 | 418 | static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) |
f6cd94b1 AH |
419 | { |
420 | struct zfcp_adapter *adapter; | |
421 | struct fc_host_statistics *fc_stats; | |
422 | struct fsf_qtcb_bottom_port *data; | |
423 | int ret; | |
424 | ||
f76af7d7 | 425 | adapter = (struct zfcp_adapter *)host->hostdata[0]; |
f6cd94b1 AH |
426 | fc_stats = zfcp_init_fc_host_stats(adapter); |
427 | if (!fc_stats) | |
428 | return NULL; | |
429 | ||
ec4081c6 | 430 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
431 | if (!data) |
432 | return NULL; | |
f6cd94b1 | 433 | |
52ef11a7 | 434 | ret = zfcp_fsf_exchange_port_data_sync(adapter, data); |
f6cd94b1 AH |
435 | if (ret) { |
436 | kfree(data); | |
f76af7d7 | 437 | return NULL; |
f6cd94b1 AH |
438 | } |
439 | ||
440 | if (adapter->stats_reset && | |
441 | ((jiffies/HZ - adapter->stats_reset) < | |
f76af7d7 | 442 | data->seconds_since_last_reset)) |
f6cd94b1 AH |
443 | zfcp_adjust_fc_host_stats(fc_stats, data, |
444 | adapter->stats_reset_data); | |
f76af7d7 | 445 | else |
f6cd94b1 AH |
446 | zfcp_set_fc_host_stats(fc_stats, data); |
447 | ||
448 | kfree(data); | |
449 | return fc_stats; | |
1da177e4 LT |
450 | } |
451 | ||
f76af7d7 | 452 | static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) |
1da177e4 | 453 | { |
f6cd94b1 | 454 | struct zfcp_adapter *adapter; |
f76af7d7 | 455 | struct fsf_qtcb_bottom_port *data; |
f6cd94b1 | 456 | int ret; |
1da177e4 | 457 | |
f6cd94b1 | 458 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; |
ec4081c6 | 459 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
460 | if (!data) |
461 | return; | |
f6cd94b1 | 462 | |
52ef11a7 | 463 | ret = zfcp_fsf_exchange_port_data_sync(adapter, data); |
f76af7d7 | 464 | if (ret) |
83f6d6d7 | 465 | kfree(data); |
f76af7d7 | 466 | else { |
f6cd94b1 | 467 | adapter->stats_reset = jiffies/HZ; |
f76af7d7 | 468 | kfree(adapter->stats_reset_data); |
f6cd94b1 | 469 | adapter->stats_reset_data = data; /* finally freed in |
f76af7d7 | 470 | adapter_dequeue */ |
f6cd94b1 | 471 | } |
1da177e4 LT |
472 | } |
473 | ||
85a82392 SS |
474 | static void zfcp_get_host_port_state(struct Scsi_Host *shost) |
475 | { | |
476 | struct zfcp_adapter *adapter = | |
477 | (struct zfcp_adapter *)shost->hostdata[0]; | |
478 | int status = atomic_read(&adapter->status); | |
479 | ||
480 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && | |
481 | !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) | |
482 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
483 | else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) | |
484 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
485 | else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
486 | fc_host_port_state(shost) = FC_PORTSTATE_ERROR; | |
487 | else | |
488 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
489 | } | |
490 | ||
338151e0 AH |
491 | static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
492 | { | |
493 | rport->dev_loss_tmo = timeout; | |
494 | } | |
495 | ||
a2fa0aed CS |
496 | /** |
497 | * zfcp_scsi_dev_loss_tmo_callbk - Free any reference to rport | |
498 | * @rport: The rport that is about to be deleted. | |
499 | */ | |
500 | static void zfcp_scsi_dev_loss_tmo_callbk(struct fc_rport *rport) | |
501 | { | |
70932935 | 502 | struct zfcp_port *port; |
a2fa0aed CS |
503 | |
504 | write_lock_irq(&zfcp_data.config_lock); | |
70932935 CS |
505 | port = rport->dd_data; |
506 | if (port) | |
507 | port->rport = NULL; | |
a2fa0aed CS |
508 | write_unlock_irq(&zfcp_data.config_lock); |
509 | } | |
510 | ||
511 | /** | |
512 | * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport | |
513 | * @rport: The FC rport where to teminate I/O | |
514 | * | |
515 | * Abort all pending SCSI commands for a port by closing the | |
516 | * port. Using a reopen for avoids a conflict with a shutdown | |
517 | * overwriting a reopen. | |
518 | */ | |
519 | static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) | |
520 | { | |
70932935 CS |
521 | struct zfcp_port *port; |
522 | ||
523 | write_lock_irq(&zfcp_data.config_lock); | |
524 | port = rport->dd_data; | |
525 | if (port) | |
526 | zfcp_port_get(port); | |
527 | write_unlock_irq(&zfcp_data.config_lock); | |
a2fa0aed | 528 | |
70932935 CS |
529 | if (port) { |
530 | zfcp_erp_port_reopen(port, 0, "sctrpi1", NULL); | |
531 | zfcp_port_put(port); | |
532 | } | |
a2fa0aed CS |
533 | } |
534 | ||
535 | static void zfcp_scsi_rport_register(struct zfcp_port *port) | |
536 | { | |
537 | struct fc_rport_identifiers ids; | |
538 | struct fc_rport *rport; | |
539 | ||
379d6bf6 CS |
540 | if (port->rport) |
541 | return; | |
542 | ||
a2fa0aed CS |
543 | ids.node_name = port->wwnn; |
544 | ids.port_name = port->wwpn; | |
545 | ids.port_id = port->d_id; | |
546 | ids.roles = FC_RPORT_ROLE_FCP_TARGET; | |
547 | ||
548 | rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); | |
549 | if (!rport) { | |
550 | dev_err(&port->adapter->ccw_device->dev, | |
551 | "Registering port 0x%016Lx failed\n", | |
552 | (unsigned long long)port->wwpn); | |
553 | return; | |
554 | } | |
555 | ||
556 | rport->dd_data = port; | |
557 | rport->maxframe_size = port->maxframe_size; | |
558 | rport->supported_classes = port->supported_classes; | |
559 | port->rport = rport; | |
560 | } | |
561 | ||
562 | static void zfcp_scsi_rport_block(struct zfcp_port *port) | |
563 | { | |
70932935 CS |
564 | struct fc_rport *rport = port->rport; |
565 | ||
379d6bf6 | 566 | if (rport) { |
70932935 | 567 | fc_remote_port_delete(rport); |
379d6bf6 CS |
568 | port->rport = NULL; |
569 | } | |
a2fa0aed CS |
570 | } |
571 | ||
572 | void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) | |
573 | { | |
574 | zfcp_port_get(port); | |
575 | port->rport_task = RPORT_ADD; | |
576 | ||
577 | if (!queue_work(zfcp_data.work_queue, &port->rport_work)) | |
578 | zfcp_port_put(port); | |
579 | } | |
580 | ||
581 | void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) | |
582 | { | |
583 | zfcp_port_get(port); | |
584 | port->rport_task = RPORT_DEL; | |
585 | ||
a67417ab SS |
586 | if (port->rport && queue_work(zfcp_data.work_queue, &port->rport_work)) |
587 | return; | |
588 | ||
589 | zfcp_port_put(port); | |
a2fa0aed CS |
590 | } |
591 | ||
592 | void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) | |
593 | { | |
594 | struct zfcp_port *port; | |
595 | ||
596 | list_for_each_entry(port, &adapter->port_list_head, list) | |
597 | zfcp_scsi_schedule_rport_block(port); | |
598 | } | |
599 | ||
600 | void zfcp_scsi_rport_work(struct work_struct *work) | |
601 | { | |
602 | struct zfcp_port *port = container_of(work, struct zfcp_port, | |
603 | rport_work); | |
604 | ||
605 | while (port->rport_task) { | |
606 | if (port->rport_task == RPORT_ADD) { | |
607 | port->rport_task = RPORT_NONE; | |
608 | zfcp_scsi_rport_register(port); | |
609 | } else { | |
610 | port->rport_task = RPORT_NONE; | |
611 | zfcp_scsi_rport_block(port); | |
612 | } | |
613 | } | |
614 | ||
615 | zfcp_port_put(port); | |
616 | } | |
617 | ||
618 | ||
92d5193b SS |
619 | void zfcp_scsi_scan(struct work_struct *work) |
620 | { | |
621 | struct zfcp_unit *unit = container_of(work, struct zfcp_unit, | |
622 | scsi_work); | |
623 | struct fc_rport *rport; | |
624 | ||
625 | flush_work(&unit->port->rport_work); | |
626 | rport = unit->port->rport; | |
627 | ||
628 | if (rport && rport->port_state == FC_PORTSTATE_ONLINE) | |
629 | scsi_scan_target(&rport->dev, 0, rport->scsi_target_id, | |
630 | scsilun_to_int((struct scsi_lun *) | |
631 | &unit->fcp_lun), 0); | |
632 | ||
633 | zfcp_unit_put(unit); | |
634 | } | |
635 | ||
9d544f2b SS |
636 | static int zfcp_execute_fc_job(struct fc_bsg_job *job) |
637 | { | |
638 | switch (job->request->msgcode) { | |
639 | case FC_BSG_RPT_ELS: | |
640 | case FC_BSG_HST_ELS_NOLOGIN: | |
641 | return zfcp_fc_execute_els_fc_job(job); | |
642 | case FC_BSG_RPT_CT: | |
643 | case FC_BSG_HST_CT: | |
644 | return zfcp_fc_execute_ct_fc_job(job); | |
645 | default: | |
646 | return -EINVAL; | |
647 | } | |
648 | } | |
649 | ||
1da177e4 | 650 | struct fc_function_template zfcp_transport_functions = { |
1da177e4 LT |
651 | .show_starget_port_id = 1, |
652 | .show_starget_port_name = 1, | |
653 | .show_starget_node_name = 1, | |
3859f6a2 | 654 | .show_rport_supported_classes = 1, |
75bfc283 | 655 | .show_rport_maxframe_size = 1, |
338151e0 | 656 | .show_rport_dev_loss_tmo = 1, |
3859f6a2 AH |
657 | .show_host_node_name = 1, |
658 | .show_host_port_name = 1, | |
ad757cdf | 659 | .show_host_permanent_port_name = 1, |
3859f6a2 | 660 | .show_host_supported_classes = 1, |
ad757cdf | 661 | .show_host_supported_speeds = 1, |
13e1e1f0 | 662 | .show_host_maxframe_size = 1, |
3859f6a2 | 663 | .show_host_serial_number = 1, |
f6cd94b1 AH |
664 | .get_fc_host_stats = zfcp_get_fc_host_stats, |
665 | .reset_fc_host_stats = zfcp_reset_fc_host_stats, | |
338151e0 | 666 | .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, |
85a82392 | 667 | .get_host_port_state = zfcp_get_host_port_state, |
a2fa0aed CS |
668 | .dev_loss_tmo_callbk = zfcp_scsi_dev_loss_tmo_callbk, |
669 | .terminate_rport_io = zfcp_scsi_terminate_rport_io, | |
85a82392 | 670 | .show_host_port_state = 1, |
9d544f2b | 671 | .bsg_request = zfcp_execute_fc_job, |
f6cd94b1 AH |
672 | /* no functions registered for following dynamic attributes but |
673 | directly set by LLDD */ | |
ad757cdf | 674 | .show_host_port_type = 1, |
13e1e1f0 AH |
675 | .show_host_speed = 1, |
676 | .show_host_port_id = 1, | |
52ef11a7 | 677 | .disable_target_scan = 1, |
1da177e4 LT |
678 | }; |
679 | ||
f76af7d7 MP |
680 | struct zfcp_data zfcp_data = { |
681 | .scsi_host_template = { | |
682 | .name = "zfcp", | |
683 | .module = THIS_MODULE, | |
684 | .proc_name = "zfcp", | |
a40a1baf | 685 | .change_queue_depth = zfcp_scsi_change_queue_depth, |
f76af7d7 MP |
686 | .slave_alloc = zfcp_scsi_slave_alloc, |
687 | .slave_configure = zfcp_scsi_slave_configure, | |
688 | .slave_destroy = zfcp_scsi_slave_destroy, | |
689 | .queuecommand = zfcp_scsi_queuecommand, | |
690 | .eh_abort_handler = zfcp_scsi_eh_abort_handler, | |
691 | .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, | |
692 | .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, | |
693 | .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, | |
694 | .can_queue = 4096, | |
695 | .this_id = -1, | |
696 | .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ, | |
697 | .cmd_per_lun = 1, | |
698 | .use_clustering = 1, | |
699 | .sdev_attrs = zfcp_sysfs_sdev_attrs, | |
700 | .max_sectors = (ZFCP_MAX_SBALES_PER_REQ * 8), | |
60221920 | 701 | .shost_attrs = zfcp_sysfs_shost_attrs, |
f76af7d7 MP |
702 | }, |
703 | }; |