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 | ||
e881a172 MC |
32 | static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth, |
33 | int reason) | |
a40a1baf | 34 | { |
42e62a74 CS |
35 | switch (reason) { |
36 | case SCSI_QDEPTH_DEFAULT: | |
37 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
38 | break; | |
39 | case SCSI_QDEPTH_QFULL: | |
40 | scsi_track_queue_full(sdev, depth); | |
41 | break; | |
42 | case SCSI_QDEPTH_RAMP_UP: | |
43 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
44 | break; | |
45 | default: | |
e881a172 | 46 | return -EOPNOTSUPP; |
42e62a74 | 47 | } |
a40a1baf CS |
48 | return sdev->queue_depth; |
49 | } | |
50 | ||
f6c0e7a7 | 51 | static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) |
1da177e4 LT |
52 | { |
53 | struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata; | |
26816f1c | 54 | unit->device = NULL; |
26816f1c | 55 | zfcp_unit_put(unit); |
1da177e4 LT |
56 | } |
57 | ||
f76af7d7 | 58 | static int zfcp_scsi_slave_configure(struct scsi_device *sdp) |
1da177e4 LT |
59 | { |
60 | if (sdp->tagged_supported) | |
a40a1baf | 61 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth); |
1da177e4 LT |
62 | else |
63 | scsi_adjust_queue_depth(sdp, 0, 1); | |
64 | return 0; | |
65 | } | |
66 | ||
f76af7d7 | 67 | static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) |
1da177e4 | 68 | { |
5771710b SS |
69 | struct zfcp_adapter *adapter = |
70 | (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; | |
feac6a07 | 71 | set_host_byte(scpnt, result); |
8a36e453 | 72 | if ((scpnt->device != NULL) && (scpnt->device->host != NULL)) |
5771710b | 73 | zfcp_dbf_scsi_result("fail", 4, adapter->dbf, scpnt, NULL); |
1da177e4 LT |
74 | /* return directly */ |
75 | scpnt->scsi_done(scpnt); | |
76 | } | |
77 | ||
f76af7d7 MP |
78 | static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, |
79 | void (*done) (struct scsi_cmnd *)) | |
1da177e4 LT |
80 | { |
81 | struct zfcp_unit *unit; | |
82 | struct zfcp_adapter *adapter; | |
a2fa0aed CS |
83 | int status, scsi_result, ret; |
84 | struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); | |
1da177e4 LT |
85 | |
86 | /* reset the status for this request */ | |
87 | scpnt->result = 0; | |
88 | scpnt->host_scribble = NULL; | |
89 | scpnt->scsi_done = done; | |
90 | ||
91 | /* | |
92 | * figure out adapter and target device | |
93 | * (stored there by zfcp_scsi_slave_alloc) | |
94 | */ | |
95 | adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; | |
f76af7d7 MP |
96 | unit = scpnt->device->hostdata; |
97 | ||
98 | BUG_ON(!adapter || (adapter != unit->port->adapter)); | |
99 | BUG_ON(!scpnt->scsi_done); | |
100 | ||
101 | if (unlikely(!unit)) { | |
102 | zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); | |
103 | return 0; | |
104 | } | |
105 | ||
a2fa0aed CS |
106 | scsi_result = fc_remote_port_chkready(rport); |
107 | if (unlikely(scsi_result)) { | |
108 | scpnt->result = scsi_result; | |
5771710b | 109 | zfcp_dbf_scsi_result("fail", 4, adapter->dbf, scpnt, NULL); |
a2fa0aed CS |
110 | scpnt->scsi_done(scpnt); |
111 | return 0; | |
112 | } | |
113 | ||
f76af7d7 MP |
114 | status = atomic_read(&unit->status); |
115 | if (unlikely((status & ZFCP_STATUS_COMMON_ERP_FAILED) || | |
116 | !(status & ZFCP_STATUS_COMMON_RUNNING))) { | |
117 | zfcp_scsi_command_fail(scpnt, DID_ERROR); | |
a419aef8 | 118 | return 0; |
f76af7d7 MP |
119 | } |
120 | ||
63caf367 | 121 | ret = zfcp_fsf_send_fcp_command_task(unit, scpnt); |
f76af7d7 | 122 | if (unlikely(ret == -EBUSY)) |
f7a65e92 | 123 | return SCSI_MLQUEUE_DEVICE_BUSY; |
f76af7d7 MP |
124 | else if (unlikely(ret < 0)) |
125 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 126 | |
f76af7d7 | 127 | return ret; |
1da177e4 LT |
128 | } |
129 | ||
f76af7d7 MP |
130 | static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter, |
131 | int channel, unsigned int id, | |
132 | unsigned int lun) | |
1da177e4 LT |
133 | { |
134 | struct zfcp_port *port; | |
f76af7d7 | 135 | struct zfcp_unit *unit; |
0406289e | 136 | int scsi_lun; |
1da177e4 LT |
137 | |
138 | list_for_each_entry(port, &adapter->port_list_head, list) { | |
3859f6a2 | 139 | if (!port->rport || (id != port->rport->scsi_target_id)) |
1da177e4 | 140 | continue; |
0406289e CS |
141 | list_for_each_entry(unit, &port->unit_list_head, list) { |
142 | scsi_lun = scsilun_to_int( | |
143 | (struct scsi_lun *)&unit->fcp_lun); | |
144 | if (lun == scsi_lun) | |
f76af7d7 | 145 | return unit; |
0406289e | 146 | } |
1da177e4 | 147 | } |
f76af7d7 MP |
148 | |
149 | return NULL; | |
150 | } | |
151 | ||
152 | static int zfcp_scsi_slave_alloc(struct scsi_device *sdp) | |
153 | { | |
154 | struct zfcp_adapter *adapter; | |
155 | struct zfcp_unit *unit; | |
156 | unsigned long flags; | |
157 | int retval = -ENXIO; | |
158 | ||
159 | adapter = (struct zfcp_adapter *) sdp->host->hostdata[0]; | |
160 | if (!adapter) | |
161 | goto out; | |
162 | ||
163 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
164 | unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun); | |
86f8a1b4 | 165 | if (unit) { |
f76af7d7 MP |
166 | sdp->hostdata = unit; |
167 | unit->device = sdp; | |
168 | zfcp_unit_get(unit); | |
169 | retval = 0; | |
170 | } | |
171 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
172 | out: | |
1da177e4 LT |
173 | return retval; |
174 | } | |
175 | ||
2b67fc46 | 176 | static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 177 | { |
63caf367 CS |
178 | struct Scsi_Host *scsi_host = scpnt->device->host; |
179 | struct zfcp_adapter *adapter = | |
180 | (struct zfcp_adapter *) scsi_host->hostdata[0]; | |
181 | struct zfcp_unit *unit = scpnt->device->hostdata; | |
182 | struct zfcp_fsf_req *old_req, *abrt_req; | |
1da177e4 | 183 | unsigned long flags; |
a11a52be | 184 | unsigned long old_reqid = (unsigned long) scpnt->host_scribble; |
4eff4a36 | 185 | int retval = SUCCESS; |
63caf367 | 186 | int retry = 3; |
a11a52be | 187 | char *dbf_tag; |
1da177e4 | 188 | |
059c97d0 | 189 | /* avoid race condition between late normal completion and abort */ |
1da177e4 LT |
190 | write_lock_irqsave(&adapter->abort_lock, flags); |
191 | ||
4eff4a36 | 192 | spin_lock(&adapter->req_list_lock); |
a11a52be | 193 | old_req = zfcp_reqlist_find(adapter, old_reqid); |
4eff4a36 | 194 | spin_unlock(&adapter->req_list_lock); |
63caf367 | 195 | if (!old_req) { |
1da177e4 | 196 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
5771710b SS |
197 | zfcp_dbf_scsi_abort("lte1", adapter->dbf, scpnt, NULL, |
198 | old_reqid); | |
c6936e7f | 199 | return FAILED; /* completion could be in progress */ |
1da177e4 | 200 | } |
63caf367 | 201 | old_req->data = NULL; |
1da177e4 | 202 | |
4eff4a36 | 203 | /* don't access old fsf_req after releasing the abort_lock */ |
1da177e4 | 204 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
4eff4a36 | 205 | |
63caf367 | 206 | while (retry--) { |
a11a52be | 207 | abrt_req = zfcp_fsf_abort_fcp_command(old_reqid, unit); |
63caf367 CS |
208 | if (abrt_req) |
209 | break; | |
210 | ||
211 | zfcp_erp_wait(adapter); | |
212 | if (!(atomic_read(&adapter->status) & | |
213 | ZFCP_STATUS_COMMON_RUNNING)) { | |
5771710b SS |
214 | zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL, |
215 | old_reqid); | |
63caf367 CS |
216 | return SUCCESS; |
217 | } | |
1da177e4 | 218 | } |
63caf367 CS |
219 | if (!abrt_req) |
220 | return FAILED; | |
1da177e4 | 221 | |
058b8647 | 222 | wait_for_completion(&abrt_req->completion); |
059c97d0 | 223 | |
63caf367 | 224 | if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) |
a11a52be | 225 | dbf_tag = "okay"; |
63caf367 | 226 | else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) |
a11a52be | 227 | dbf_tag = "lte2"; |
63caf367 | 228 | else { |
a11a52be | 229 | dbf_tag = "fail"; |
1da177e4 | 230 | retval = FAILED; |
1da177e4 | 231 | } |
5771710b | 232 | zfcp_dbf_scsi_abort(dbf_tag, adapter->dbf, scpnt, abrt_req, old_reqid); |
63caf367 | 233 | zfcp_fsf_req_free(abrt_req); |
f76af7d7 | 234 | return retval; |
1da177e4 LT |
235 | } |
236 | ||
63caf367 | 237 | static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) |
1da177e4 | 238 | { |
63caf367 | 239 | struct zfcp_unit *unit = scpnt->device->hostdata; |
1da177e4 | 240 | struct zfcp_adapter *adapter = unit->port->adapter; |
564e1c86 | 241 | struct zfcp_fsf_req *fsf_req = NULL; |
f76af7d7 | 242 | int retval = SUCCESS; |
63caf367 CS |
243 | int retry = 3; |
244 | ||
245 | while (retry--) { | |
246 | fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags); | |
247 | if (fsf_req) | |
248 | break; | |
249 | ||
250 | zfcp_erp_wait(adapter); | |
251 | if (!(atomic_read(&adapter->status) & | |
252 | ZFCP_STATUS_COMMON_RUNNING)) { | |
5771710b | 253 | zfcp_dbf_scsi_devreset("nres", tm_flags, unit, scpnt); |
63caf367 CS |
254 | return SUCCESS; |
255 | } | |
1da177e4 | 256 | } |
63caf367 CS |
257 | if (!fsf_req) |
258 | return FAILED; | |
1da177e4 | 259 | |
058b8647 | 260 | wait_for_completion(&fsf_req->completion); |
77eb1699 | 261 | |
8a36e453 | 262 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { |
5771710b | 263 | zfcp_dbf_scsi_devreset("fail", tm_flags, unit, scpnt); |
f76af7d7 | 264 | retval = FAILED; |
8a36e453 | 265 | } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) { |
5771710b | 266 | zfcp_dbf_scsi_devreset("nsup", tm_flags, unit, scpnt); |
f76af7d7 | 267 | retval = FAILED; |
8a36e453 | 268 | } else |
5771710b | 269 | zfcp_dbf_scsi_devreset("okay", tm_flags, unit, scpnt); |
77eb1699 AH |
270 | |
271 | zfcp_fsf_req_free(fsf_req); | |
1da177e4 LT |
272 | return retval; |
273 | } | |
274 | ||
f76af7d7 MP |
275 | static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) |
276 | { | |
63caf367 | 277 | return zfcp_task_mgmt_function(scpnt, FCP_LOGICAL_UNIT_RESET); |
f76af7d7 MP |
278 | } |
279 | ||
280 | static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) | |
281 | { | |
63caf367 | 282 | return zfcp_task_mgmt_function(scpnt, FCP_TARGET_RESET); |
f76af7d7 MP |
283 | } |
284 | ||
2b67fc46 | 285 | static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 286 | { |
63caf367 CS |
287 | struct zfcp_unit *unit = scpnt->device->hostdata; |
288 | struct zfcp_adapter *adapter = unit->port->adapter; | |
1da177e4 | 289 | |
5ffd51a5 | 290 | zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt); |
81654286 | 291 | zfcp_erp_wait(adapter); |
1da177e4 | 292 | |
810f1e3e | 293 | return SUCCESS; |
1da177e4 LT |
294 | } |
295 | ||
f76af7d7 | 296 | int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) |
1da177e4 | 297 | { |
f76af7d7 | 298 | struct ccw_dev_id dev_id; |
1da177e4 | 299 | |
9f28745a | 300 | if (adapter->scsi_host) |
f76af7d7 | 301 | return 0; |
9f28745a | 302 | |
f76af7d7 | 303 | ccw_device_get_id(adapter->ccw_device, &dev_id); |
1da177e4 LT |
304 | /* register adapter as SCSI host with mid layer of SCSI stack */ |
305 | adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template, | |
306 | sizeof (struct zfcp_adapter *)); | |
307 | if (!adapter->scsi_host) { | |
553448f6 | 308 | dev_err(&adapter->ccw_device->dev, |
ff3b24fa CS |
309 | "Registering the FCP device with the " |
310 | "SCSI stack failed\n"); | |
f76af7d7 | 311 | return -EIO; |
1da177e4 | 312 | } |
1da177e4 LT |
313 | |
314 | /* tell the SCSI stack some characteristics of this adapter */ | |
315 | adapter->scsi_host->max_id = 1; | |
316 | adapter->scsi_host->max_lun = 1; | |
317 | adapter->scsi_host->max_channel = 0; | |
f76af7d7 MP |
318 | adapter->scsi_host->unique_id = dev_id.devno; |
319 | adapter->scsi_host->max_cmd_len = 255; | |
dd52e0ea | 320 | adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; |
1da177e4 | 321 | |
1da177e4 LT |
322 | adapter->scsi_host->hostdata[0] = (unsigned long) adapter; |
323 | ||
324 | if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { | |
325 | scsi_host_put(adapter->scsi_host); | |
f76af7d7 | 326 | return -EIO; |
1da177e4 | 327 | } |
f76af7d7 MP |
328 | |
329 | return 0; | |
1da177e4 LT |
330 | } |
331 | ||
f76af7d7 | 332 | void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) |
1da177e4 LT |
333 | { |
334 | struct Scsi_Host *shost; | |
13e1e1f0 | 335 | struct zfcp_port *port; |
1da177e4 LT |
336 | |
337 | shost = adapter->scsi_host; | |
338 | if (!shost) | |
339 | return; | |
f76af7d7 | 340 | |
13e1e1f0 AH |
341 | read_lock_irq(&zfcp_data.config_lock); |
342 | list_for_each_entry(port, &adapter->port_list_head, list) | |
343 | if (port->rport) | |
344 | port->rport = NULL; | |
f76af7d7 | 345 | |
13e1e1f0 | 346 | read_unlock_irq(&zfcp_data.config_lock); |
3859f6a2 | 347 | fc_remove_host(shost); |
1da177e4 LT |
348 | scsi_remove_host(shost); |
349 | scsi_host_put(shost); | |
350 | adapter->scsi_host = NULL; | |
1da177e4 LT |
351 | |
352 | return; | |
353 | } | |
354 | ||
f6cd94b1 AH |
355 | static struct fc_host_statistics* |
356 | zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) | |
1da177e4 | 357 | { |
f6cd94b1 | 358 | struct fc_host_statistics *fc_stats; |
1da177e4 | 359 | |
f6cd94b1 AH |
360 | if (!adapter->fc_stats) { |
361 | fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); | |
362 | if (!fc_stats) | |
363 | return NULL; | |
364 | adapter->fc_stats = fc_stats; /* freed in adater_dequeue */ | |
365 | } | |
366 | memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); | |
367 | return adapter->fc_stats; | |
1da177e4 LT |
368 | } |
369 | ||
f76af7d7 MP |
370 | static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, |
371 | struct fsf_qtcb_bottom_port *data, | |
372 | struct fsf_qtcb_bottom_port *old) | |
1da177e4 | 373 | { |
f76af7d7 MP |
374 | fc_stats->seconds_since_last_reset = |
375 | data->seconds_since_last_reset - old->seconds_since_last_reset; | |
f6cd94b1 AH |
376 | fc_stats->tx_frames = data->tx_frames - old->tx_frames; |
377 | fc_stats->tx_words = data->tx_words - old->tx_words; | |
378 | fc_stats->rx_frames = data->rx_frames - old->rx_frames; | |
379 | fc_stats->rx_words = data->rx_words - old->rx_words; | |
380 | fc_stats->lip_count = data->lip - old->lip; | |
381 | fc_stats->nos_count = data->nos - old->nos; | |
382 | fc_stats->error_frames = data->error_frames - old->error_frames; | |
383 | fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; | |
384 | fc_stats->link_failure_count = data->link_failure - old->link_failure; | |
385 | fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; | |
f76af7d7 MP |
386 | fc_stats->loss_of_signal_count = |
387 | data->loss_of_signal - old->loss_of_signal; | |
388 | fc_stats->prim_seq_protocol_err_count = | |
389 | data->psp_error_counts - old->psp_error_counts; | |
390 | fc_stats->invalid_tx_word_count = | |
391 | data->invalid_tx_words - old->invalid_tx_words; | |
f6cd94b1 | 392 | fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; |
f76af7d7 MP |
393 | fc_stats->fcp_input_requests = |
394 | data->input_requests - old->input_requests; | |
395 | fc_stats->fcp_output_requests = | |
396 | data->output_requests - old->output_requests; | |
397 | fc_stats->fcp_control_requests = | |
398 | data->control_requests - old->control_requests; | |
f6cd94b1 AH |
399 | fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; |
400 | fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; | |
401 | } | |
1da177e4 | 402 | |
f76af7d7 MP |
403 | static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, |
404 | struct fsf_qtcb_bottom_port *data) | |
f6cd94b1 AH |
405 | { |
406 | fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; | |
407 | fc_stats->tx_frames = data->tx_frames; | |
408 | fc_stats->tx_words = data->tx_words; | |
409 | fc_stats->rx_frames = data->rx_frames; | |
410 | fc_stats->rx_words = data->rx_words; | |
411 | fc_stats->lip_count = data->lip; | |
412 | fc_stats->nos_count = data->nos; | |
413 | fc_stats->error_frames = data->error_frames; | |
414 | fc_stats->dumped_frames = data->dumped_frames; | |
415 | fc_stats->link_failure_count = data->link_failure; | |
416 | fc_stats->loss_of_sync_count = data->loss_of_sync; | |
417 | fc_stats->loss_of_signal_count = data->loss_of_signal; | |
418 | fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; | |
419 | fc_stats->invalid_tx_word_count = data->invalid_tx_words; | |
420 | fc_stats->invalid_crc_count = data->invalid_crcs; | |
421 | fc_stats->fcp_input_requests = data->input_requests; | |
422 | fc_stats->fcp_output_requests = data->output_requests; | |
423 | fc_stats->fcp_control_requests = data->control_requests; | |
424 | fc_stats->fcp_input_megabytes = data->input_mb; | |
425 | fc_stats->fcp_output_megabytes = data->output_mb; | |
426 | } | |
427 | ||
f76af7d7 | 428 | static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) |
f6cd94b1 AH |
429 | { |
430 | struct zfcp_adapter *adapter; | |
431 | struct fc_host_statistics *fc_stats; | |
432 | struct fsf_qtcb_bottom_port *data; | |
433 | int ret; | |
434 | ||
f76af7d7 | 435 | adapter = (struct zfcp_adapter *)host->hostdata[0]; |
f6cd94b1 AH |
436 | fc_stats = zfcp_init_fc_host_stats(adapter); |
437 | if (!fc_stats) | |
438 | return NULL; | |
439 | ||
ec4081c6 | 440 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
441 | if (!data) |
442 | return NULL; | |
f6cd94b1 | 443 | |
564e1c86 | 444 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f6cd94b1 AH |
445 | if (ret) { |
446 | kfree(data); | |
f76af7d7 | 447 | return NULL; |
f6cd94b1 AH |
448 | } |
449 | ||
450 | if (adapter->stats_reset && | |
451 | ((jiffies/HZ - adapter->stats_reset) < | |
f76af7d7 | 452 | data->seconds_since_last_reset)) |
f6cd94b1 AH |
453 | zfcp_adjust_fc_host_stats(fc_stats, data, |
454 | adapter->stats_reset_data); | |
f76af7d7 | 455 | else |
f6cd94b1 AH |
456 | zfcp_set_fc_host_stats(fc_stats, data); |
457 | ||
458 | kfree(data); | |
459 | return fc_stats; | |
1da177e4 LT |
460 | } |
461 | ||
f76af7d7 | 462 | static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) |
1da177e4 | 463 | { |
f6cd94b1 | 464 | struct zfcp_adapter *adapter; |
f76af7d7 | 465 | struct fsf_qtcb_bottom_port *data; |
f6cd94b1 | 466 | int ret; |
1da177e4 | 467 | |
f6cd94b1 | 468 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; |
ec4081c6 | 469 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
470 | if (!data) |
471 | return; | |
f6cd94b1 | 472 | |
564e1c86 | 473 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f76af7d7 | 474 | if (ret) |
83f6d6d7 | 475 | kfree(data); |
f76af7d7 | 476 | else { |
f6cd94b1 | 477 | adapter->stats_reset = jiffies/HZ; |
f76af7d7 | 478 | kfree(adapter->stats_reset_data); |
f6cd94b1 | 479 | adapter->stats_reset_data = data; /* finally freed in |
f76af7d7 | 480 | adapter_dequeue */ |
f6cd94b1 | 481 | } |
1da177e4 LT |
482 | } |
483 | ||
85a82392 SS |
484 | static void zfcp_get_host_port_state(struct Scsi_Host *shost) |
485 | { | |
486 | struct zfcp_adapter *adapter = | |
487 | (struct zfcp_adapter *)shost->hostdata[0]; | |
488 | int status = atomic_read(&adapter->status); | |
489 | ||
490 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && | |
491 | !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) | |
492 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
493 | else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) | |
494 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
495 | else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
496 | fc_host_port_state(shost) = FC_PORTSTATE_ERROR; | |
497 | else | |
498 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
499 | } | |
500 | ||
338151e0 AH |
501 | static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
502 | { | |
503 | rport->dev_loss_tmo = timeout; | |
504 | } | |
505 | ||
a2fa0aed CS |
506 | /** |
507 | * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport | |
508 | * @rport: The FC rport where to teminate I/O | |
509 | * | |
510 | * Abort all pending SCSI commands for a port by closing the | |
511 | * port. Using a reopen for avoids a conflict with a shutdown | |
512 | * overwriting a reopen. | |
513 | */ | |
514 | static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) | |
515 | { | |
70932935 | 516 | struct zfcp_port *port; |
ea945ff8 SS |
517 | struct Scsi_Host *shost = rport_to_shost(rport); |
518 | struct zfcp_adapter *adapter = | |
519 | (struct zfcp_adapter *)shost->hostdata[0]; | |
70932935 CS |
520 | |
521 | write_lock_irq(&zfcp_data.config_lock); | |
ea945ff8 | 522 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
70932935 CS |
523 | if (port) |
524 | zfcp_port_get(port); | |
525 | write_unlock_irq(&zfcp_data.config_lock); | |
a2fa0aed | 526 | |
70932935 CS |
527 | if (port) { |
528 | zfcp_erp_port_reopen(port, 0, "sctrpi1", NULL); | |
529 | zfcp_port_put(port); | |
530 | } | |
a2fa0aed CS |
531 | } |
532 | ||
533 | static void zfcp_scsi_rport_register(struct zfcp_port *port) | |
534 | { | |
535 | struct fc_rport_identifiers ids; | |
536 | struct fc_rport *rport; | |
537 | ||
379d6bf6 CS |
538 | if (port->rport) |
539 | return; | |
540 | ||
a2fa0aed CS |
541 | ids.node_name = port->wwnn; |
542 | ids.port_name = port->wwpn; | |
543 | ids.port_id = port->d_id; | |
544 | ids.roles = FC_RPORT_ROLE_FCP_TARGET; | |
545 | ||
546 | rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); | |
547 | if (!rport) { | |
548 | dev_err(&port->adapter->ccw_device->dev, | |
549 | "Registering port 0x%016Lx failed\n", | |
550 | (unsigned long long)port->wwpn); | |
551 | return; | |
552 | } | |
553 | ||
a2fa0aed CS |
554 | rport->maxframe_size = port->maxframe_size; |
555 | rport->supported_classes = port->supported_classes; | |
556 | port->rport = rport; | |
557 | } | |
558 | ||
559 | static void zfcp_scsi_rport_block(struct zfcp_port *port) | |
560 | { | |
70932935 CS |
561 | struct fc_rport *rport = port->rport; |
562 | ||
379d6bf6 | 563 | if (rport) { |
70932935 | 564 | fc_remote_port_delete(rport); |
379d6bf6 CS |
565 | port->rport = NULL; |
566 | } | |
a2fa0aed CS |
567 | } |
568 | ||
569 | void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) | |
570 | { | |
571 | zfcp_port_get(port); | |
572 | port->rport_task = RPORT_ADD; | |
573 | ||
4544683a | 574 | if (!queue_work(port->adapter->work_queue, &port->rport_work)) |
a2fa0aed CS |
575 | zfcp_port_put(port); |
576 | } | |
577 | ||
578 | void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) | |
579 | { | |
580 | zfcp_port_get(port); | |
581 | port->rport_task = RPORT_DEL; | |
582 | ||
4544683a SS |
583 | if (port->rport && queue_work(port->adapter->work_queue, |
584 | &port->rport_work)) | |
a67417ab SS |
585 | return; |
586 | ||
587 | zfcp_port_put(port); | |
a2fa0aed CS |
588 | } |
589 | ||
590 | void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) | |
591 | { | |
592 | struct zfcp_port *port; | |
593 | ||
594 | list_for_each_entry(port, &adapter->port_list_head, list) | |
595 | zfcp_scsi_schedule_rport_block(port); | |
596 | } | |
597 | ||
598 | void zfcp_scsi_rport_work(struct work_struct *work) | |
599 | { | |
600 | struct zfcp_port *port = container_of(work, struct zfcp_port, | |
601 | rport_work); | |
602 | ||
603 | while (port->rport_task) { | |
604 | if (port->rport_task == RPORT_ADD) { | |
605 | port->rport_task = RPORT_NONE; | |
606 | zfcp_scsi_rport_register(port); | |
607 | } else { | |
608 | port->rport_task = RPORT_NONE; | |
609 | zfcp_scsi_rport_block(port); | |
610 | } | |
611 | } | |
612 | ||
613 | zfcp_port_put(port); | |
614 | } | |
615 | ||
616 | ||
92d5193b SS |
617 | void zfcp_scsi_scan(struct work_struct *work) |
618 | { | |
619 | struct zfcp_unit *unit = container_of(work, struct zfcp_unit, | |
620 | scsi_work); | |
621 | struct fc_rport *rport; | |
622 | ||
623 | flush_work(&unit->port->rport_work); | |
624 | rport = unit->port->rport; | |
625 | ||
626 | if (rport && rport->port_state == FC_PORTSTATE_ONLINE) | |
627 | scsi_scan_target(&rport->dev, 0, rport->scsi_target_id, | |
628 | scsilun_to_int((struct scsi_lun *) | |
629 | &unit->fcp_lun), 0); | |
630 | ||
631 | zfcp_unit_put(unit); | |
632 | } | |
633 | ||
9d544f2b SS |
634 | static int zfcp_execute_fc_job(struct fc_bsg_job *job) |
635 | { | |
636 | switch (job->request->msgcode) { | |
637 | case FC_BSG_RPT_ELS: | |
638 | case FC_BSG_HST_ELS_NOLOGIN: | |
639 | return zfcp_fc_execute_els_fc_job(job); | |
640 | case FC_BSG_RPT_CT: | |
641 | case FC_BSG_HST_CT: | |
642 | return zfcp_fc_execute_ct_fc_job(job); | |
643 | default: | |
644 | return -EINVAL; | |
645 | } | |
646 | } | |
647 | ||
1da177e4 | 648 | struct fc_function_template zfcp_transport_functions = { |
1da177e4 LT |
649 | .show_starget_port_id = 1, |
650 | .show_starget_port_name = 1, | |
651 | .show_starget_node_name = 1, | |
3859f6a2 | 652 | .show_rport_supported_classes = 1, |
75bfc283 | 653 | .show_rport_maxframe_size = 1, |
338151e0 | 654 | .show_rport_dev_loss_tmo = 1, |
3859f6a2 AH |
655 | .show_host_node_name = 1, |
656 | .show_host_port_name = 1, | |
ad757cdf | 657 | .show_host_permanent_port_name = 1, |
3859f6a2 | 658 | .show_host_supported_classes = 1, |
ad757cdf | 659 | .show_host_supported_speeds = 1, |
13e1e1f0 | 660 | .show_host_maxframe_size = 1, |
3859f6a2 | 661 | .show_host_serial_number = 1, |
f6cd94b1 AH |
662 | .get_fc_host_stats = zfcp_get_fc_host_stats, |
663 | .reset_fc_host_stats = zfcp_reset_fc_host_stats, | |
338151e0 | 664 | .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, |
85a82392 | 665 | .get_host_port_state = zfcp_get_host_port_state, |
a2fa0aed | 666 | .terminate_rport_io = zfcp_scsi_terminate_rport_io, |
85a82392 | 667 | .show_host_port_state = 1, |
9d544f2b | 668 | .bsg_request = zfcp_execute_fc_job, |
f6cd94b1 AH |
669 | /* no functions registered for following dynamic attributes but |
670 | directly set by LLDD */ | |
ad757cdf | 671 | .show_host_port_type = 1, |
13e1e1f0 AH |
672 | .show_host_speed = 1, |
673 | .show_host_port_id = 1, | |
52ef11a7 | 674 | .disable_target_scan = 1, |
1da177e4 LT |
675 | }; |
676 | ||
f76af7d7 MP |
677 | struct zfcp_data zfcp_data = { |
678 | .scsi_host_template = { | |
679 | .name = "zfcp", | |
680 | .module = THIS_MODULE, | |
681 | .proc_name = "zfcp", | |
a40a1baf | 682 | .change_queue_depth = zfcp_scsi_change_queue_depth, |
f76af7d7 MP |
683 | .slave_alloc = zfcp_scsi_slave_alloc, |
684 | .slave_configure = zfcp_scsi_slave_configure, | |
685 | .slave_destroy = zfcp_scsi_slave_destroy, | |
686 | .queuecommand = zfcp_scsi_queuecommand, | |
687 | .eh_abort_handler = zfcp_scsi_eh_abort_handler, | |
688 | .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, | |
689 | .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, | |
690 | .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, | |
691 | .can_queue = 4096, | |
692 | .this_id = -1, | |
693 | .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ, | |
694 | .cmd_per_lun = 1, | |
695 | .use_clustering = 1, | |
696 | .sdev_attrs = zfcp_sysfs_sdev_attrs, | |
697 | .max_sectors = (ZFCP_MAX_SBALES_PER_REQ * 8), | |
60221920 | 698 | .shost_attrs = zfcp_sysfs_shost_attrs, |
f76af7d7 MP |
699 | }, |
700 | }; |