Commit | Line | Data |
---|---|---|
41fa2ada | 1 | /* |
553448f6 | 2 | * zfcp device driver |
1da177e4 | 3 | * |
553448f6 | 4 | * Interface to Linux SCSI midlayer. |
41fa2ada | 5 | * |
553448f6 | 6 | * Copyright IBM Corporation 2002, 2008 |
1da177e4 LT |
7 | */ |
8 | ||
1da177e4 | 9 | #include "zfcp_ext.h" |
5f852be9 | 10 | #include <asm/atomic.h> |
1da177e4 | 11 | |
1da177e4 | 12 | /* Find start of Sense Information in FCP response unit*/ |
f76af7d7 | 13 | char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu) |
1da177e4 LT |
14 | { |
15 | char *fcp_sns_info_ptr; | |
16 | ||
f76af7d7 | 17 | fcp_sns_info_ptr = (unsigned char *) &fcp_rsp_iu[1]; |
1da177e4 | 18 | if (fcp_rsp_iu->validity.bits.fcp_rsp_len_valid) |
f76af7d7 | 19 | fcp_sns_info_ptr += fcp_rsp_iu->fcp_rsp_len; |
1da177e4 LT |
20 | |
21 | return fcp_sns_info_ptr; | |
22 | } | |
23 | ||
f76af7d7 | 24 | void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, fcp_dl_t fcp_dl) |
1da177e4 | 25 | { |
f76af7d7 | 26 | fcp_dl_t *fcp_dl_ptr; |
1da177e4 | 27 | |
1da177e4 | 28 | /* |
41fa2ada | 29 | * fcp_dl_addr = start address of fcp_cmnd structure + |
1da177e4 LT |
30 | * size of fixed part + size of dynamically sized add_dcp_cdb field |
31 | * SEE FCP-2 documentation | |
32 | */ | |
f76af7d7 MP |
33 | fcp_dl_ptr = (fcp_dl_t *) ((unsigned char *) &fcp_cmd[1] + |
34 | (fcp_cmd->add_fcp_cdb_length << 2)); | |
35 | *fcp_dl_ptr = fcp_dl; | |
1da177e4 LT |
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; | |
553448f6 | 41 | WARN_ON(!unit); |
1da177e4 | 42 | if (unit) { |
ad58f7db | 43 | atomic_clear_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status); |
1da177e4 LT |
44 | sdpnt->hostdata = NULL; |
45 | unit->device = NULL; | |
1f6f7129 | 46 | zfcp_erp_unit_failed(unit, 12, NULL); |
1da177e4 | 47 | zfcp_unit_put(unit); |
553448f6 | 48 | } |
1da177e4 LT |
49 | } |
50 | ||
f76af7d7 | 51 | static int zfcp_scsi_slave_configure(struct scsi_device *sdp) |
1da177e4 LT |
52 | { |
53 | if (sdp->tagged_supported) | |
f76af7d7 | 54 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, 32); |
1da177e4 LT |
55 | else |
56 | scsi_adjust_queue_depth(sdp, 0, 1); | |
57 | return 0; | |
58 | } | |
59 | ||
f76af7d7 | 60 | static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) |
1da177e4 | 61 | { |
feac6a07 | 62 | set_host_byte(scpnt, result); |
8a36e453 MS |
63 | if ((scpnt->device != NULL) && (scpnt->device->host != NULL)) |
64 | zfcp_scsi_dbf_event_result("fail", 4, | |
65 | (struct zfcp_adapter*) scpnt->device->host->hostdata[0], | |
ed829ad6 | 66 | scpnt, NULL); |
1da177e4 LT |
67 | /* return directly */ |
68 | scpnt->scsi_done(scpnt); | |
69 | } | |
70 | ||
f76af7d7 MP |
71 | static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, |
72 | void (*done) (struct scsi_cmnd *)) | |
1da177e4 LT |
73 | { |
74 | struct zfcp_unit *unit; | |
75 | struct zfcp_adapter *adapter; | |
f76af7d7 MP |
76 | int status; |
77 | int ret; | |
1da177e4 LT |
78 | |
79 | /* reset the status for this request */ | |
80 | scpnt->result = 0; | |
81 | scpnt->host_scribble = NULL; | |
82 | scpnt->scsi_done = done; | |
83 | ||
84 | /* | |
85 | * figure out adapter and target device | |
86 | * (stored there by zfcp_scsi_slave_alloc) | |
87 | */ | |
88 | adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; | |
f76af7d7 MP |
89 | unit = scpnt->device->hostdata; |
90 | ||
91 | BUG_ON(!adapter || (adapter != unit->port->adapter)); | |
92 | BUG_ON(!scpnt->scsi_done); | |
93 | ||
94 | if (unlikely(!unit)) { | |
95 | zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); | |
96 | return 0; | |
97 | } | |
98 | ||
99 | status = atomic_read(&unit->status); | |
100 | if (unlikely((status & ZFCP_STATUS_COMMON_ERP_FAILED) || | |
101 | !(status & ZFCP_STATUS_COMMON_RUNNING))) { | |
102 | zfcp_scsi_command_fail(scpnt, DID_ERROR); | |
103 | return 0;; | |
104 | } | |
105 | ||
106 | ret = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, 0, | |
107 | ZFCP_REQ_AUTO_CLEANUP); | |
108 | if (unlikely(ret == -EBUSY)) | |
109 | zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); | |
110 | else if (unlikely(ret < 0)) | |
111 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 112 | |
f76af7d7 | 113 | return ret; |
1da177e4 LT |
114 | } |
115 | ||
f76af7d7 MP |
116 | static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter, |
117 | int channel, unsigned int id, | |
118 | unsigned int lun) | |
1da177e4 LT |
119 | { |
120 | struct zfcp_port *port; | |
f76af7d7 | 121 | struct zfcp_unit *unit; |
1da177e4 LT |
122 | |
123 | list_for_each_entry(port, &adapter->port_list_head, list) { | |
3859f6a2 | 124 | if (!port->rport || (id != port->rport->scsi_target_id)) |
1da177e4 | 125 | continue; |
6b76a721 | 126 | list_for_each_entry(unit, &port->unit_list_head, list) |
f76af7d7 MP |
127 | if (lun == unit->scsi_lun) |
128 | return unit; | |
1da177e4 | 129 | } |
f76af7d7 MP |
130 | |
131 | return NULL; | |
132 | } | |
133 | ||
134 | static int zfcp_scsi_slave_alloc(struct scsi_device *sdp) | |
135 | { | |
136 | struct zfcp_adapter *adapter; | |
137 | struct zfcp_unit *unit; | |
138 | unsigned long flags; | |
139 | int retval = -ENXIO; | |
140 | ||
141 | adapter = (struct zfcp_adapter *) sdp->host->hostdata[0]; | |
142 | if (!adapter) | |
143 | goto out; | |
144 | ||
145 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
146 | unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun); | |
147 | if (unit && | |
148 | (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_REGISTERED)) { | |
149 | sdp->hostdata = unit; | |
150 | unit->device = sdp; | |
151 | zfcp_unit_get(unit); | |
152 | retval = 0; | |
153 | } | |
154 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
155 | out: | |
1da177e4 LT |
156 | return retval; |
157 | } | |
158 | ||
2b67fc46 | 159 | static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 160 | { |
059c97d0 AH |
161 | struct Scsi_Host *scsi_host; |
162 | struct zfcp_adapter *adapter; | |
163 | struct zfcp_unit *unit; | |
4eff4a36 | 164 | struct zfcp_fsf_req *fsf_req; |
1da177e4 | 165 | unsigned long flags; |
f76af7d7 | 166 | unsigned long old_req_id = (unsigned long) scpnt->host_scribble; |
4eff4a36 | 167 | int retval = SUCCESS; |
059c97d0 AH |
168 | |
169 | scsi_host = scpnt->device->host; | |
170 | adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; | |
f76af7d7 | 171 | unit = scpnt->device->hostdata; |
1da177e4 | 172 | |
059c97d0 | 173 | /* avoid race condition between late normal completion and abort */ |
1da177e4 LT |
174 | write_lock_irqsave(&adapter->abort_lock, flags); |
175 | ||
4eff4a36 AH |
176 | /* Check whether corresponding fsf_req is still pending */ |
177 | spin_lock(&adapter->req_list_lock); | |
f76af7d7 | 178 | fsf_req = zfcp_reqlist_find(adapter, old_req_id); |
4eff4a36 AH |
179 | spin_unlock(&adapter->req_list_lock); |
180 | if (!fsf_req) { | |
1da177e4 | 181 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
4eff4a36 | 182 | zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, 0); |
f76af7d7 | 183 | return retval; |
1da177e4 | 184 | } |
4eff4a36 AH |
185 | fsf_req->data = 0; |
186 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTING; | |
1da177e4 | 187 | |
4eff4a36 | 188 | /* don't access old fsf_req after releasing the abort_lock */ |
1da177e4 | 189 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
4eff4a36 AH |
190 | |
191 | fsf_req = zfcp_fsf_abort_fcp_command(old_req_id, adapter, unit, 0); | |
192 | if (!fsf_req) { | |
ed829ad6 | 193 | zfcp_scsi_dbf_event_abort("nres", adapter, scpnt, NULL, |
4eff4a36 | 194 | old_req_id); |
1da177e4 | 195 | retval = FAILED; |
f76af7d7 | 196 | return retval; |
1da177e4 LT |
197 | } |
198 | ||
4eff4a36 AH |
199 | __wait_event(fsf_req->completion_wq, |
200 | fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); | |
059c97d0 | 201 | |
4eff4a36 AH |
202 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) { |
203 | zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, fsf_req, 0); | |
4eff4a36 AH |
204 | } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) { |
205 | zfcp_scsi_dbf_event_abort("lte2", adapter, scpnt, fsf_req, 0); | |
1da177e4 | 206 | } else { |
4eff4a36 | 207 | zfcp_scsi_dbf_event_abort("fail", adapter, scpnt, fsf_req, 0); |
1da177e4 | 208 | retval = FAILED; |
1da177e4 | 209 | } |
4eff4a36 | 210 | zfcp_fsf_req_free(fsf_req); |
1da177e4 | 211 | |
f76af7d7 | 212 | return retval; |
1da177e4 LT |
213 | } |
214 | ||
f76af7d7 MP |
215 | static int zfcp_task_mgmt_function(struct zfcp_unit *unit, u8 tm_flags, |
216 | struct scsi_cmnd *scpnt) | |
1da177e4 LT |
217 | { |
218 | struct zfcp_adapter *adapter = unit->port->adapter; | |
1da177e4 | 219 | struct zfcp_fsf_req *fsf_req; |
f76af7d7 | 220 | int retval = SUCCESS; |
1da177e4 LT |
221 | |
222 | /* issue task management function */ | |
223 | fsf_req = zfcp_fsf_send_fcp_command_task_management | |
224 | (adapter, unit, tm_flags, 0); | |
225 | if (!fsf_req) { | |
8a36e453 | 226 | zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit, scpnt); |
f76af7d7 | 227 | return FAILED; |
1da177e4 LT |
228 | } |
229 | ||
77eb1699 AH |
230 | __wait_event(fsf_req->completion_wq, |
231 | fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); | |
232 | ||
8a36e453 MS |
233 | /* |
234 | * check completion status of task management function | |
235 | */ | |
236 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { | |
237 | zfcp_scsi_dbf_event_devreset("fail", tm_flags, unit, scpnt); | |
f76af7d7 | 238 | retval = FAILED; |
8a36e453 MS |
239 | } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) { |
240 | zfcp_scsi_dbf_event_devreset("nsup", tm_flags, unit, scpnt); | |
f76af7d7 | 241 | retval = FAILED; |
8a36e453 MS |
242 | } else |
243 | zfcp_scsi_dbf_event_devreset("okay", tm_flags, unit, scpnt); | |
77eb1699 AH |
244 | |
245 | zfcp_fsf_req_free(fsf_req); | |
f76af7d7 | 246 | |
1da177e4 LT |
247 | return retval; |
248 | } | |
249 | ||
f76af7d7 MP |
250 | static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) |
251 | { | |
252 | struct zfcp_unit *unit = scpnt->device->hostdata; | |
253 | ||
254 | if (!unit) { | |
255 | WARN_ON(1); | |
256 | return SUCCESS; | |
257 | } | |
258 | return zfcp_task_mgmt_function(unit, FCP_LOGICAL_UNIT_RESET, scpnt); | |
259 | } | |
260 | ||
261 | static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) | |
262 | { | |
263 | struct zfcp_unit *unit = scpnt->device->hostdata; | |
264 | ||
265 | if (!unit) { | |
266 | WARN_ON(1); | |
267 | return SUCCESS; | |
268 | } | |
269 | return zfcp_task_mgmt_function(unit, FCP_TARGET_RESET, scpnt); | |
270 | } | |
271 | ||
2b67fc46 | 272 | static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 273 | { |
f6c0e7a7 AH |
274 | struct zfcp_unit *unit; |
275 | struct zfcp_adapter *adapter; | |
1da177e4 | 276 | |
f76af7d7 | 277 | unit = scpnt->device->hostdata; |
f6c0e7a7 | 278 | adapter = unit->port->adapter; |
1f6f7129 | 279 | zfcp_erp_adapter_reopen(adapter, 0, 141, scpnt); |
81654286 | 280 | zfcp_erp_wait(adapter); |
1da177e4 | 281 | |
810f1e3e | 282 | return SUCCESS; |
1da177e4 LT |
283 | } |
284 | ||
f76af7d7 | 285 | int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) |
1da177e4 | 286 | { |
f76af7d7 | 287 | struct ccw_dev_id dev_id; |
1da177e4 | 288 | |
9f28745a | 289 | if (adapter->scsi_host) |
f76af7d7 | 290 | return 0; |
9f28745a | 291 | |
f76af7d7 | 292 | ccw_device_get_id(adapter->ccw_device, &dev_id); |
1da177e4 LT |
293 | /* register adapter as SCSI host with mid layer of SCSI stack */ |
294 | adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template, | |
295 | sizeof (struct zfcp_adapter *)); | |
296 | if (!adapter->scsi_host) { | |
553448f6 CS |
297 | dev_err(&adapter->ccw_device->dev, |
298 | "registration with SCSI stack failed."); | |
f76af7d7 | 299 | return -EIO; |
1da177e4 | 300 | } |
1da177e4 LT |
301 | |
302 | /* tell the SCSI stack some characteristics of this adapter */ | |
303 | adapter->scsi_host->max_id = 1; | |
304 | adapter->scsi_host->max_lun = 1; | |
305 | adapter->scsi_host->max_channel = 0; | |
f76af7d7 MP |
306 | adapter->scsi_host->unique_id = dev_id.devno; |
307 | adapter->scsi_host->max_cmd_len = 255; | |
dd52e0ea | 308 | adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; |
1da177e4 | 309 | |
1da177e4 LT |
310 | adapter->scsi_host->hostdata[0] = (unsigned long) adapter; |
311 | ||
312 | if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { | |
313 | scsi_host_put(adapter->scsi_host); | |
f76af7d7 | 314 | return -EIO; |
1da177e4 LT |
315 | } |
316 | atomic_set_mask(ZFCP_STATUS_ADAPTER_REGISTERED, &adapter->status); | |
f76af7d7 MP |
317 | |
318 | return 0; | |
1da177e4 LT |
319 | } |
320 | ||
f76af7d7 | 321 | void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) |
1da177e4 LT |
322 | { |
323 | struct Scsi_Host *shost; | |
13e1e1f0 | 324 | struct zfcp_port *port; |
1da177e4 LT |
325 | |
326 | shost = adapter->scsi_host; | |
327 | if (!shost) | |
328 | return; | |
f76af7d7 | 329 | |
13e1e1f0 AH |
330 | read_lock_irq(&zfcp_data.config_lock); |
331 | list_for_each_entry(port, &adapter->port_list_head, list) | |
332 | if (port->rport) | |
333 | port->rport = NULL; | |
f76af7d7 | 334 | |
13e1e1f0 | 335 | read_unlock_irq(&zfcp_data.config_lock); |
3859f6a2 | 336 | fc_remove_host(shost); |
1da177e4 LT |
337 | scsi_remove_host(shost); |
338 | scsi_host_put(shost); | |
339 | adapter->scsi_host = NULL; | |
1da177e4 LT |
340 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_REGISTERED, &adapter->status); |
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 | ||
1da177e4 | 496 | struct fc_function_template zfcp_transport_functions = { |
1da177e4 LT |
497 | .show_starget_port_id = 1, |
498 | .show_starget_port_name = 1, | |
499 | .show_starget_node_name = 1, | |
3859f6a2 | 500 | .show_rport_supported_classes = 1, |
75bfc283 | 501 | .show_rport_maxframe_size = 1, |
338151e0 | 502 | .show_rport_dev_loss_tmo = 1, |
3859f6a2 AH |
503 | .show_host_node_name = 1, |
504 | .show_host_port_name = 1, | |
ad757cdf | 505 | .show_host_permanent_port_name = 1, |
3859f6a2 | 506 | .show_host_supported_classes = 1, |
ad757cdf | 507 | .show_host_supported_speeds = 1, |
13e1e1f0 | 508 | .show_host_maxframe_size = 1, |
3859f6a2 | 509 | .show_host_serial_number = 1, |
f6cd94b1 AH |
510 | .get_fc_host_stats = zfcp_get_fc_host_stats, |
511 | .reset_fc_host_stats = zfcp_reset_fc_host_stats, | |
338151e0 | 512 | .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, |
85a82392 SS |
513 | .get_host_port_state = zfcp_get_host_port_state, |
514 | .show_host_port_state = 1, | |
f6cd94b1 AH |
515 | /* no functions registered for following dynamic attributes but |
516 | directly set by LLDD */ | |
ad757cdf | 517 | .show_host_port_type = 1, |
13e1e1f0 AH |
518 | .show_host_speed = 1, |
519 | .show_host_port_id = 1, | |
52ef11a7 | 520 | .disable_target_scan = 1, |
1da177e4 LT |
521 | }; |
522 | ||
3a0d9e92 CS |
523 | #define ZFCP_DEFINE_LATENCY_ATTR(_name) \ |
524 | static ssize_t \ | |
525 | zfcp_sysfs_unit_##_name##_latency_show(struct device *dev, \ | |
526 | struct device_attribute *attr, \ | |
527 | char *buf) { \ | |
528 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
529 | struct zfcp_unit *unit = sdev->hostdata; \ | |
530 | struct zfcp_latencies *lat = &unit->latencies; \ | |
531 | struct zfcp_adapter *adapter = unit->port->adapter; \ | |
532 | unsigned long flags; \ | |
533 | unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc; \ | |
534 | \ | |
535 | spin_lock_irqsave(&lat->lock, flags); \ | |
536 | fsum = lat->_name.fabric.sum * adapter->timer_ticks; \ | |
537 | fmin = lat->_name.fabric.min * adapter->timer_ticks; \ | |
538 | fmax = lat->_name.fabric.max * adapter->timer_ticks; \ | |
539 | csum = lat->_name.channel.sum * adapter->timer_ticks; \ | |
540 | cmin = lat->_name.channel.min * adapter->timer_ticks; \ | |
541 | cmax = lat->_name.channel.max * adapter->timer_ticks; \ | |
542 | cc = lat->_name.counter; \ | |
543 | spin_unlock_irqrestore(&lat->lock, flags); \ | |
544 | \ | |
545 | do_div(fsum, 1000); \ | |
546 | do_div(fmin, 1000); \ | |
547 | do_div(fmax, 1000); \ | |
548 | do_div(csum, 1000); \ | |
549 | do_div(cmin, 1000); \ | |
550 | do_div(cmax, 1000); \ | |
551 | \ | |
552 | return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n", \ | |
553 | fmin, fmax, fsum, cmin, cmax, csum, cc); \ | |
554 | } \ | |
555 | static ssize_t \ | |
556 | zfcp_sysfs_unit_##_name##_latency_store(struct device *dev, \ | |
557 | struct device_attribute *attr, \ | |
558 | const char *buf, size_t count) \ | |
559 | { \ | |
560 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
561 | struct zfcp_unit *unit = sdev->hostdata; \ | |
562 | struct zfcp_latencies *lat = &unit->latencies; \ | |
563 | unsigned long flags; \ | |
564 | \ | |
565 | spin_lock_irqsave(&lat->lock, flags); \ | |
566 | lat->_name.fabric.sum = 0; \ | |
567 | lat->_name.fabric.min = 0xFFFFFFFF; \ | |
568 | lat->_name.fabric.max = 0; \ | |
569 | lat->_name.channel.sum = 0; \ | |
570 | lat->_name.channel.min = 0xFFFFFFFF; \ | |
571 | lat->_name.channel.max = 0; \ | |
572 | lat->_name.counter = 0; \ | |
573 | spin_unlock_irqrestore(&lat->lock, flags); \ | |
574 | \ | |
575 | return (ssize_t) count; \ | |
576 | } \ | |
577 | static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO, \ | |
578 | zfcp_sysfs_unit_##_name##_latency_show, \ | |
579 | zfcp_sysfs_unit_##_name##_latency_store); | |
580 | ||
581 | ZFCP_DEFINE_LATENCY_ATTR(read); | |
582 | ZFCP_DEFINE_LATENCY_ATTR(write); | |
583 | ZFCP_DEFINE_LATENCY_ATTR(cmd); | |
584 | ||
1da177e4 | 585 | #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \ |
10523b3b | 586 | static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
587 | char *buf) \ |
588 | { \ | |
589 | struct scsi_device *sdev; \ | |
590 | struct zfcp_unit *unit; \ | |
591 | \ | |
592 | sdev = to_scsi_device(dev); \ | |
593 | unit = sdev->hostdata; \ | |
594 | return sprintf(buf, _format, _value); \ | |
595 | } \ | |
596 | \ | |
597 | static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL); | |
598 | ||
f76af7d7 MP |
599 | ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n", |
600 | unit->port->adapter->ccw_device->dev.bus_id); | |
1da177e4 LT |
601 | ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n", unit->port->wwpn); |
602 | ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n", unit->fcp_lun); | |
603 | ||
604 | static struct device_attribute *zfcp_sysfs_sdev_attrs[] = { | |
605 | &dev_attr_fcp_lun, | |
606 | &dev_attr_wwpn, | |
607 | &dev_attr_hba_id, | |
3a0d9e92 CS |
608 | &dev_attr_read_latency, |
609 | &dev_attr_write_latency, | |
610 | &dev_attr_cmd_latency, | |
1da177e4 LT |
611 | NULL |
612 | }; | |
613 | ||
6d9d63b9 SS |
614 | static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev, |
615 | struct device_attribute *attr, | |
616 | char *buf) | |
617 | { | |
618 | struct Scsi_Host *scsi_host = dev_to_shost(dev); | |
619 | struct fsf_qtcb_bottom_port *qtcb_port; | |
6d9d63b9 | 620 | struct zfcp_adapter *adapter; |
f76af7d7 | 621 | int retval; |
6d9d63b9 SS |
622 | |
623 | adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; | |
624 | if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)) | |
625 | return -EOPNOTSUPP; | |
626 | ||
627 | qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL); | |
628 | if (!qtcb_port) | |
629 | return -ENOMEM; | |
630 | ||
631 | retval = zfcp_fsf_exchange_port_data_sync(adapter, qtcb_port); | |
632 | if (!retval) | |
633 | retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util, | |
634 | qtcb_port->cb_util, qtcb_port->a_util); | |
635 | kfree(qtcb_port); | |
636 | return retval; | |
637 | } | |
638 | ||
639 | static int zfcp_sysfs_adapter_ex_config(struct device *dev, | |
640 | struct fsf_statistics_info *stat_inf) | |
641 | { | |
6d9d63b9 | 642 | struct Scsi_Host *scsi_host = dev_to_shost(dev); |
f76af7d7 | 643 | struct fsf_qtcb_bottom_config *qtcb_config; |
6d9d63b9 | 644 | struct zfcp_adapter *adapter; |
f76af7d7 | 645 | int retval; |
6d9d63b9 SS |
646 | |
647 | adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; | |
648 | if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)) | |
649 | return -EOPNOTSUPP; | |
650 | ||
651 | qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config), | |
f76af7d7 | 652 | GFP_KERNEL); |
6d9d63b9 SS |
653 | if (!qtcb_config) |
654 | return -ENOMEM; | |
655 | ||
656 | retval = zfcp_fsf_exchange_config_data_sync(adapter, qtcb_config); | |
657 | if (!retval) | |
658 | *stat_inf = qtcb_config->stat_info; | |
659 | ||
660 | kfree(qtcb_config); | |
661 | return retval; | |
662 | } | |
663 | ||
664 | static ssize_t zfcp_sysfs_adapter_request_show(struct device *dev, | |
665 | struct device_attribute *attr, | |
666 | char *buf) | |
667 | { | |
668 | struct fsf_statistics_info stat_info; | |
669 | int retval; | |
670 | ||
671 | retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); | |
672 | if (retval) | |
673 | return retval; | |
674 | ||
675 | return sprintf(buf, "%llu %llu %llu\n", | |
676 | (unsigned long long) stat_info.input_req, | |
677 | (unsigned long long) stat_info.output_req, | |
678 | (unsigned long long) stat_info.control_req); | |
679 | } | |
680 | ||
681 | static ssize_t zfcp_sysfs_adapter_mb_show(struct device *dev, | |
682 | struct device_attribute *attr, | |
683 | char *buf) | |
684 | { | |
685 | struct fsf_statistics_info stat_info; | |
686 | int retval; | |
687 | ||
688 | retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); | |
689 | if (retval) | |
690 | return retval; | |
691 | ||
692 | return sprintf(buf, "%llu %llu\n", | |
693 | (unsigned long long) stat_info.input_mb, | |
694 | (unsigned long long) stat_info.output_mb); | |
695 | } | |
696 | ||
697 | static ssize_t zfcp_sysfs_adapter_sec_active_show(struct device *dev, | |
698 | struct device_attribute *attr, | |
699 | char *buf) | |
700 | { | |
701 | struct fsf_statistics_info stat_info; | |
702 | int retval; | |
703 | ||
704 | retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); | |
705 | if (retval) | |
706 | return retval; | |
707 | ||
708 | return sprintf(buf, "%llu\n", | |
709 | (unsigned long long) stat_info.seconds_act); | |
710 | } | |
711 | ||
712 | static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL); | |
713 | static DEVICE_ATTR(requests, S_IRUGO, zfcp_sysfs_adapter_request_show, NULL); | |
714 | static DEVICE_ATTR(megabytes, S_IRUGO, zfcp_sysfs_adapter_mb_show, NULL); | |
715 | static DEVICE_ATTR(seconds_active, S_IRUGO, | |
716 | zfcp_sysfs_adapter_sec_active_show, NULL); | |
717 | ||
718 | static struct device_attribute *zfcp_a_stats_attrs[] = { | |
719 | &dev_attr_utilization, | |
720 | &dev_attr_requests, | |
721 | &dev_attr_megabytes, | |
722 | &dev_attr_seconds_active, | |
723 | NULL | |
724 | }; | |
f76af7d7 MP |
725 | |
726 | struct zfcp_data zfcp_data = { | |
727 | .scsi_host_template = { | |
728 | .name = "zfcp", | |
729 | .module = THIS_MODULE, | |
730 | .proc_name = "zfcp", | |
731 | .slave_alloc = zfcp_scsi_slave_alloc, | |
732 | .slave_configure = zfcp_scsi_slave_configure, | |
733 | .slave_destroy = zfcp_scsi_slave_destroy, | |
734 | .queuecommand = zfcp_scsi_queuecommand, | |
735 | .eh_abort_handler = zfcp_scsi_eh_abort_handler, | |
736 | .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, | |
737 | .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, | |
738 | .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, | |
739 | .can_queue = 4096, | |
740 | .this_id = -1, | |
741 | .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ, | |
742 | .cmd_per_lun = 1, | |
743 | .use_clustering = 1, | |
744 | .sdev_attrs = zfcp_sysfs_sdev_attrs, | |
745 | .max_sectors = (ZFCP_MAX_SBALES_PER_REQ * 8), | |
746 | .shost_attrs = zfcp_a_stats_attrs, | |
747 | }, | |
748 | }; | |
749 |