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Commit | Line | Data |
---|---|---|
41fa2ada | 1 | /* |
553448f6 | 2 | * zfcp device driver |
1da177e4 | 3 | * |
553448f6 | 4 | * Interface to Linux SCSI midlayer. |
41fa2ada | 5 | * |
615f59e0 | 6 | * Copyright IBM Corporation 2002, 2010 |
1da177e4 LT |
7 | */ |
8 | ||
ecf39d42 CS |
9 | #define KMSG_COMPONENT "zfcp" |
10 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
11 | ||
4318e08c | 12 | #include <linux/types.h> |
5a0e3ad6 | 13 | #include <linux/slab.h> |
4318e08c | 14 | #include <scsi/fc/fc_fcp.h> |
5f852be9 | 15 | #include <asm/atomic.h> |
dcd20e23 CS |
16 | #include "zfcp_ext.h" |
17 | #include "zfcp_dbf.h" | |
7c7dc196 | 18 | #include "zfcp_fc.h" |
b6bd2fb9 | 19 | #include "zfcp_reqlist.h" |
1da177e4 | 20 | |
a40a1baf CS |
21 | static unsigned int default_depth = 32; |
22 | module_param_named(queue_depth, default_depth, uint, 0600); | |
23 | MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices"); | |
24 | ||
e881a172 MC |
25 | static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth, |
26 | int reason) | |
a40a1baf | 27 | { |
42e62a74 CS |
28 | switch (reason) { |
29 | case SCSI_QDEPTH_DEFAULT: | |
30 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
31 | break; | |
32 | case SCSI_QDEPTH_QFULL: | |
33 | scsi_track_queue_full(sdev, depth); | |
34 | break; | |
35 | case SCSI_QDEPTH_RAMP_UP: | |
36 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
37 | break; | |
38 | default: | |
e881a172 | 39 | return -EOPNOTSUPP; |
42e62a74 | 40 | } |
a40a1baf CS |
41 | return sdev->queue_depth; |
42 | } | |
43 | ||
f6c0e7a7 | 44 | static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) |
1da177e4 LT |
45 | { |
46 | struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata; | |
26816f1c | 47 | unit->device = NULL; |
615f59e0 | 48 | put_device(&unit->dev); |
1da177e4 LT |
49 | } |
50 | ||
f76af7d7 | 51 | static int zfcp_scsi_slave_configure(struct scsi_device *sdp) |
1da177e4 LT |
52 | { |
53 | if (sdp->tagged_supported) | |
a40a1baf | 54 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth); |
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 | { |
5771710b SS |
62 | struct zfcp_adapter *adapter = |
63 | (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; | |
22ed1307 | 64 | |
feac6a07 | 65 | set_host_byte(scpnt, result); |
ab72528a | 66 | zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt); |
1da177e4 LT |
67 | scpnt->scsi_done(scpnt); |
68 | } | |
69 | ||
f76af7d7 MP |
70 | static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, |
71 | void (*done) (struct scsi_cmnd *)) | |
1da177e4 LT |
72 | { |
73 | struct zfcp_unit *unit; | |
74 | struct zfcp_adapter *adapter; | |
a2fa0aed CS |
75 | int status, scsi_result, ret; |
76 | struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); | |
1da177e4 LT |
77 | |
78 | /* reset the status for this request */ | |
79 | scpnt->result = 0; | |
80 | scpnt->host_scribble = NULL; | |
81 | scpnt->scsi_done = done; | |
82 | ||
83 | /* | |
84 | * figure out adapter and target device | |
85 | * (stored there by zfcp_scsi_slave_alloc) | |
86 | */ | |
87 | adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; | |
f76af7d7 MP |
88 | unit = scpnt->device->hostdata; |
89 | ||
a2fa0aed CS |
90 | scsi_result = fc_remote_port_chkready(rport); |
91 | if (unlikely(scsi_result)) { | |
92 | scpnt->result = scsi_result; | |
ab72528a | 93 | zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt); |
a2fa0aed CS |
94 | scpnt->scsi_done(scpnt); |
95 | return 0; | |
96 | } | |
97 | ||
f76af7d7 | 98 | status = atomic_read(&unit->status); |
8830271c CS |
99 | if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) && |
100 | !(atomic_read(&unit->port->status) & | |
101 | ZFCP_STATUS_COMMON_ERP_FAILED)) { | |
102 | /* only unit access denied, but port is good | |
103 | * not covered by FC transport, have to fail here */ | |
f76af7d7 | 104 | zfcp_scsi_command_fail(scpnt, DID_ERROR); |
a419aef8 | 105 | return 0; |
f76af7d7 MP |
106 | } |
107 | ||
8830271c CS |
108 | if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { |
109 | /* This could be either | |
110 | * open unit pending: this is temporary, will result in | |
111 | * open unit or ERP_FAILED, so retry command | |
112 | * call to rport_delete pending: mimic retry from | |
113 | * fc_remote_port_chkready until rport is BLOCKED | |
114 | */ | |
115 | zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY); | |
116 | return 0; | |
117 | } | |
118 | ||
63caf367 | 119 | ret = zfcp_fsf_send_fcp_command_task(unit, scpnt); |
f76af7d7 | 120 | if (unlikely(ret == -EBUSY)) |
f7a65e92 | 121 | return SCSI_MLQUEUE_DEVICE_BUSY; |
f76af7d7 MP |
122 | else if (unlikely(ret < 0)) |
123 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 124 | |
f76af7d7 | 125 | return ret; |
1da177e4 LT |
126 | } |
127 | ||
f76af7d7 | 128 | static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter, |
ecf0c772 | 129 | unsigned int id, u64 lun) |
1da177e4 | 130 | { |
ecf0c772 | 131 | unsigned long flags; |
1da177e4 | 132 | struct zfcp_port *port; |
ecf0c772 | 133 | struct zfcp_unit *unit = NULL; |
1da177e4 | 134 | |
ecf0c772 SS |
135 | read_lock_irqsave(&adapter->port_list_lock, flags); |
136 | list_for_each_entry(port, &adapter->port_list, list) { | |
3859f6a2 | 137 | if (!port->rport || (id != port->rport->scsi_target_id)) |
1da177e4 | 138 | continue; |
ecf0c772 SS |
139 | unit = zfcp_get_unit_by_lun(port, lun); |
140 | if (unit) | |
141 | break; | |
1da177e4 | 142 | } |
ecf0c772 | 143 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
f76af7d7 | 144 | |
ecf0c772 | 145 | return unit; |
f76af7d7 MP |
146 | } |
147 | ||
148 | static int zfcp_scsi_slave_alloc(struct scsi_device *sdp) | |
149 | { | |
150 | struct zfcp_adapter *adapter; | |
151 | struct zfcp_unit *unit; | |
ecf0c772 | 152 | u64 lun; |
f76af7d7 MP |
153 | |
154 | adapter = (struct zfcp_adapter *) sdp->host->hostdata[0]; | |
155 | if (!adapter) | |
156 | goto out; | |
157 | ||
ecf0c772 SS |
158 | int_to_scsilun(sdp->lun, (struct scsi_lun *)&lun); |
159 | unit = zfcp_unit_lookup(adapter, sdp->id, lun); | |
86f8a1b4 | 160 | if (unit) { |
f76af7d7 MP |
161 | sdp->hostdata = unit; |
162 | unit->device = sdp; | |
ecf0c772 | 163 | return 0; |
f76af7d7 | 164 | } |
f76af7d7 | 165 | out: |
ecf0c772 | 166 | return -ENXIO; |
1da177e4 LT |
167 | } |
168 | ||
2b67fc46 | 169 | static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 170 | { |
63caf367 CS |
171 | struct Scsi_Host *scsi_host = scpnt->device->host; |
172 | struct zfcp_adapter *adapter = | |
173 | (struct zfcp_adapter *) scsi_host->hostdata[0]; | |
174 | struct zfcp_unit *unit = scpnt->device->hostdata; | |
175 | struct zfcp_fsf_req *old_req, *abrt_req; | |
1da177e4 | 176 | unsigned long flags; |
a11a52be | 177 | unsigned long old_reqid = (unsigned long) scpnt->host_scribble; |
a1dbfddd | 178 | int retval = SUCCESS, ret; |
63caf367 | 179 | int retry = 3; |
a11a52be | 180 | char *dbf_tag; |
1da177e4 | 181 | |
059c97d0 | 182 | /* avoid race condition between late normal completion and abort */ |
1da177e4 LT |
183 | write_lock_irqsave(&adapter->abort_lock, flags); |
184 | ||
b6bd2fb9 | 185 | old_req = zfcp_reqlist_find(adapter->req_list, old_reqid); |
63caf367 | 186 | if (!old_req) { |
1da177e4 | 187 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
5771710b SS |
188 | zfcp_dbf_scsi_abort("lte1", adapter->dbf, scpnt, NULL, |
189 | old_reqid); | |
c6936e7f | 190 | return FAILED; /* completion could be in progress */ |
1da177e4 | 191 | } |
63caf367 | 192 | old_req->data = NULL; |
1da177e4 | 193 | |
4eff4a36 | 194 | /* don't access old fsf_req after releasing the abort_lock */ |
1da177e4 | 195 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
4eff4a36 | 196 | |
63caf367 | 197 | while (retry--) { |
a11a52be | 198 | abrt_req = zfcp_fsf_abort_fcp_command(old_reqid, unit); |
63caf367 CS |
199 | if (abrt_req) |
200 | break; | |
201 | ||
202 | zfcp_erp_wait(adapter); | |
a1dbfddd CS |
203 | ret = fc_block_scsi_eh(scpnt); |
204 | if (ret) | |
205 | return ret; | |
63caf367 CS |
206 | if (!(atomic_read(&adapter->status) & |
207 | ZFCP_STATUS_COMMON_RUNNING)) { | |
5771710b SS |
208 | zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL, |
209 | old_reqid); | |
63caf367 CS |
210 | return SUCCESS; |
211 | } | |
1da177e4 | 212 | } |
63caf367 CS |
213 | if (!abrt_req) |
214 | return FAILED; | |
1da177e4 | 215 | |
058b8647 | 216 | wait_for_completion(&abrt_req->completion); |
059c97d0 | 217 | |
63caf367 | 218 | if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) |
a11a52be | 219 | dbf_tag = "okay"; |
63caf367 | 220 | else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) |
a11a52be | 221 | dbf_tag = "lte2"; |
63caf367 | 222 | else { |
a11a52be | 223 | dbf_tag = "fail"; |
1da177e4 | 224 | retval = FAILED; |
1da177e4 | 225 | } |
5771710b | 226 | zfcp_dbf_scsi_abort(dbf_tag, adapter->dbf, scpnt, abrt_req, old_reqid); |
63caf367 | 227 | zfcp_fsf_req_free(abrt_req); |
f76af7d7 | 228 | return retval; |
1da177e4 LT |
229 | } |
230 | ||
63caf367 | 231 | static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) |
1da177e4 | 232 | { |
63caf367 | 233 | struct zfcp_unit *unit = scpnt->device->hostdata; |
1da177e4 | 234 | struct zfcp_adapter *adapter = unit->port->adapter; |
564e1c86 | 235 | struct zfcp_fsf_req *fsf_req = NULL; |
a1dbfddd | 236 | int retval = SUCCESS, ret; |
63caf367 CS |
237 | int retry = 3; |
238 | ||
239 | while (retry--) { | |
240 | fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags); | |
241 | if (fsf_req) | |
242 | break; | |
243 | ||
244 | zfcp_erp_wait(adapter); | |
a1dbfddd CS |
245 | ret = fc_block_scsi_eh(scpnt); |
246 | if (ret) | |
247 | return ret; | |
248 | ||
63caf367 CS |
249 | if (!(atomic_read(&adapter->status) & |
250 | ZFCP_STATUS_COMMON_RUNNING)) { | |
5771710b | 251 | zfcp_dbf_scsi_devreset("nres", tm_flags, unit, scpnt); |
63caf367 CS |
252 | return SUCCESS; |
253 | } | |
1da177e4 | 254 | } |
63caf367 CS |
255 | if (!fsf_req) |
256 | return FAILED; | |
1da177e4 | 257 | |
058b8647 | 258 | wait_for_completion(&fsf_req->completion); |
77eb1699 | 259 | |
8a36e453 | 260 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { |
5771710b | 261 | zfcp_dbf_scsi_devreset("fail", tm_flags, unit, scpnt); |
f76af7d7 | 262 | retval = FAILED; |
8a36e453 | 263 | } else |
5771710b | 264 | zfcp_dbf_scsi_devreset("okay", tm_flags, unit, scpnt); |
77eb1699 AH |
265 | |
266 | zfcp_fsf_req_free(fsf_req); | |
1da177e4 LT |
267 | return retval; |
268 | } | |
269 | ||
f76af7d7 MP |
270 | static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) |
271 | { | |
4318e08c | 272 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); |
f76af7d7 MP |
273 | } |
274 | ||
275 | static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) | |
276 | { | |
4318e08c | 277 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); |
f76af7d7 MP |
278 | } |
279 | ||
2b67fc46 | 280 | static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 281 | { |
63caf367 CS |
282 | struct zfcp_unit *unit = scpnt->device->hostdata; |
283 | struct zfcp_adapter *adapter = unit->port->adapter; | |
a1dbfddd | 284 | int ret; |
1da177e4 | 285 | |
5ffd51a5 | 286 | zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt); |
81654286 | 287 | zfcp_erp_wait(adapter); |
a1dbfddd CS |
288 | ret = fc_block_scsi_eh(scpnt); |
289 | if (ret) | |
290 | return ret; | |
1da177e4 | 291 | |
810f1e3e | 292 | return SUCCESS; |
1da177e4 LT |
293 | } |
294 | ||
f76af7d7 | 295 | int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) |
1da177e4 | 296 | { |
f76af7d7 | 297 | struct ccw_dev_id dev_id; |
1da177e4 | 298 | |
9f28745a | 299 | if (adapter->scsi_host) |
f76af7d7 | 300 | return 0; |
9f28745a | 301 | |
f76af7d7 | 302 | ccw_device_get_id(adapter->ccw_device, &dev_id); |
1da177e4 LT |
303 | /* register adapter as SCSI host with mid layer of SCSI stack */ |
304 | adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template, | |
305 | sizeof (struct zfcp_adapter *)); | |
306 | if (!adapter->scsi_host) { | |
553448f6 | 307 | dev_err(&adapter->ccw_device->dev, |
ff3b24fa CS |
308 | "Registering the FCP device with the " |
309 | "SCSI stack failed\n"); | |
f76af7d7 | 310 | return -EIO; |
1da177e4 | 311 | } |
1da177e4 LT |
312 | |
313 | /* tell the SCSI stack some characteristics of this adapter */ | |
314 | adapter->scsi_host->max_id = 1; | |
315 | adapter->scsi_host->max_lun = 1; | |
316 | adapter->scsi_host->max_channel = 0; | |
f76af7d7 | 317 | adapter->scsi_host->unique_id = dev_id.devno; |
4318e08c | 318 | adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ |
dd52e0ea | 319 | adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; |
1da177e4 | 320 | |
1da177e4 LT |
321 | adapter->scsi_host->hostdata[0] = (unsigned long) adapter; |
322 | ||
323 | if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { | |
324 | scsi_host_put(adapter->scsi_host); | |
f76af7d7 | 325 | return -EIO; |
1da177e4 | 326 | } |
f76af7d7 MP |
327 | |
328 | return 0; | |
1da177e4 LT |
329 | } |
330 | ||
f76af7d7 | 331 | void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) |
1da177e4 LT |
332 | { |
333 | struct Scsi_Host *shost; | |
13e1e1f0 | 334 | struct zfcp_port *port; |
1da177e4 LT |
335 | |
336 | shost = adapter->scsi_host; | |
337 | if (!shost) | |
338 | return; | |
f76af7d7 | 339 | |
ecf0c772 SS |
340 | read_lock_irq(&adapter->port_list_lock); |
341 | list_for_each_entry(port, &adapter->port_list, list) | |
f3450c7b | 342 | port->rport = NULL; |
ecf0c772 | 343 | read_unlock_irq(&adapter->port_list_lock); |
f76af7d7 | 344 | |
3859f6a2 | 345 | fc_remove_host(shost); |
1da177e4 LT |
346 | scsi_remove_host(shost); |
347 | scsi_host_put(shost); | |
348 | adapter->scsi_host = NULL; | |
1da177e4 LT |
349 | |
350 | return; | |
351 | } | |
352 | ||
f6cd94b1 AH |
353 | static struct fc_host_statistics* |
354 | zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) | |
1da177e4 | 355 | { |
f6cd94b1 | 356 | struct fc_host_statistics *fc_stats; |
1da177e4 | 357 | |
f6cd94b1 AH |
358 | if (!adapter->fc_stats) { |
359 | fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); | |
360 | if (!fc_stats) | |
361 | return NULL; | |
f3450c7b | 362 | adapter->fc_stats = fc_stats; /* freed in adapter_release */ |
f6cd94b1 AH |
363 | } |
364 | memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); | |
365 | return adapter->fc_stats; | |
1da177e4 LT |
366 | } |
367 | ||
f76af7d7 MP |
368 | static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, |
369 | struct fsf_qtcb_bottom_port *data, | |
370 | struct fsf_qtcb_bottom_port *old) | |
1da177e4 | 371 | { |
f76af7d7 MP |
372 | fc_stats->seconds_since_last_reset = |
373 | data->seconds_since_last_reset - old->seconds_since_last_reset; | |
f6cd94b1 AH |
374 | fc_stats->tx_frames = data->tx_frames - old->tx_frames; |
375 | fc_stats->tx_words = data->tx_words - old->tx_words; | |
376 | fc_stats->rx_frames = data->rx_frames - old->rx_frames; | |
377 | fc_stats->rx_words = data->rx_words - old->rx_words; | |
378 | fc_stats->lip_count = data->lip - old->lip; | |
379 | fc_stats->nos_count = data->nos - old->nos; | |
380 | fc_stats->error_frames = data->error_frames - old->error_frames; | |
381 | fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; | |
382 | fc_stats->link_failure_count = data->link_failure - old->link_failure; | |
383 | fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; | |
f76af7d7 MP |
384 | fc_stats->loss_of_signal_count = |
385 | data->loss_of_signal - old->loss_of_signal; | |
386 | fc_stats->prim_seq_protocol_err_count = | |
387 | data->psp_error_counts - old->psp_error_counts; | |
388 | fc_stats->invalid_tx_word_count = | |
389 | data->invalid_tx_words - old->invalid_tx_words; | |
f6cd94b1 | 390 | fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; |
f76af7d7 MP |
391 | fc_stats->fcp_input_requests = |
392 | data->input_requests - old->input_requests; | |
393 | fc_stats->fcp_output_requests = | |
394 | data->output_requests - old->output_requests; | |
395 | fc_stats->fcp_control_requests = | |
396 | data->control_requests - old->control_requests; | |
f6cd94b1 AH |
397 | fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; |
398 | fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; | |
399 | } | |
1da177e4 | 400 | |
f76af7d7 MP |
401 | static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, |
402 | struct fsf_qtcb_bottom_port *data) | |
f6cd94b1 AH |
403 | { |
404 | fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; | |
405 | fc_stats->tx_frames = data->tx_frames; | |
406 | fc_stats->tx_words = data->tx_words; | |
407 | fc_stats->rx_frames = data->rx_frames; | |
408 | fc_stats->rx_words = data->rx_words; | |
409 | fc_stats->lip_count = data->lip; | |
410 | fc_stats->nos_count = data->nos; | |
411 | fc_stats->error_frames = data->error_frames; | |
412 | fc_stats->dumped_frames = data->dumped_frames; | |
413 | fc_stats->link_failure_count = data->link_failure; | |
414 | fc_stats->loss_of_sync_count = data->loss_of_sync; | |
415 | fc_stats->loss_of_signal_count = data->loss_of_signal; | |
416 | fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; | |
417 | fc_stats->invalid_tx_word_count = data->invalid_tx_words; | |
418 | fc_stats->invalid_crc_count = data->invalid_crcs; | |
419 | fc_stats->fcp_input_requests = data->input_requests; | |
420 | fc_stats->fcp_output_requests = data->output_requests; | |
421 | fc_stats->fcp_control_requests = data->control_requests; | |
422 | fc_stats->fcp_input_megabytes = data->input_mb; | |
423 | fc_stats->fcp_output_megabytes = data->output_mb; | |
424 | } | |
425 | ||
f76af7d7 | 426 | static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) |
f6cd94b1 AH |
427 | { |
428 | struct zfcp_adapter *adapter; | |
429 | struct fc_host_statistics *fc_stats; | |
430 | struct fsf_qtcb_bottom_port *data; | |
431 | int ret; | |
432 | ||
f76af7d7 | 433 | adapter = (struct zfcp_adapter *)host->hostdata[0]; |
f6cd94b1 AH |
434 | fc_stats = zfcp_init_fc_host_stats(adapter); |
435 | if (!fc_stats) | |
436 | return NULL; | |
437 | ||
ec4081c6 | 438 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
439 | if (!data) |
440 | return NULL; | |
f6cd94b1 | 441 | |
564e1c86 | 442 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f6cd94b1 AH |
443 | if (ret) { |
444 | kfree(data); | |
f76af7d7 | 445 | return NULL; |
f6cd94b1 AH |
446 | } |
447 | ||
448 | if (adapter->stats_reset && | |
449 | ((jiffies/HZ - adapter->stats_reset) < | |
f76af7d7 | 450 | data->seconds_since_last_reset)) |
f6cd94b1 AH |
451 | zfcp_adjust_fc_host_stats(fc_stats, data, |
452 | adapter->stats_reset_data); | |
f76af7d7 | 453 | else |
f6cd94b1 AH |
454 | zfcp_set_fc_host_stats(fc_stats, data); |
455 | ||
456 | kfree(data); | |
457 | return fc_stats; | |
1da177e4 LT |
458 | } |
459 | ||
f76af7d7 | 460 | static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) |
1da177e4 | 461 | { |
f6cd94b1 | 462 | struct zfcp_adapter *adapter; |
f76af7d7 | 463 | struct fsf_qtcb_bottom_port *data; |
f6cd94b1 | 464 | int ret; |
1da177e4 | 465 | |
f6cd94b1 | 466 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; |
ec4081c6 | 467 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
468 | if (!data) |
469 | return; | |
f6cd94b1 | 470 | |
564e1c86 | 471 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f76af7d7 | 472 | if (ret) |
83f6d6d7 | 473 | kfree(data); |
f76af7d7 | 474 | else { |
f6cd94b1 | 475 | adapter->stats_reset = jiffies/HZ; |
f76af7d7 | 476 | kfree(adapter->stats_reset_data); |
f6cd94b1 | 477 | adapter->stats_reset_data = data; /* finally freed in |
f3450c7b | 478 | adapter_release */ |
f6cd94b1 | 479 | } |
1da177e4 LT |
480 | } |
481 | ||
85a82392 SS |
482 | static void zfcp_get_host_port_state(struct Scsi_Host *shost) |
483 | { | |
484 | struct zfcp_adapter *adapter = | |
485 | (struct zfcp_adapter *)shost->hostdata[0]; | |
486 | int status = atomic_read(&adapter->status); | |
487 | ||
488 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && | |
489 | !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) | |
490 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
491 | else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) | |
492 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
493 | else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
494 | fc_host_port_state(shost) = FC_PORTSTATE_ERROR; | |
495 | else | |
496 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
497 | } | |
498 | ||
338151e0 AH |
499 | static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
500 | { | |
501 | rport->dev_loss_tmo = timeout; | |
502 | } | |
503 | ||
a2fa0aed CS |
504 | /** |
505 | * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport | |
506 | * @rport: The FC rport where to teminate I/O | |
507 | * | |
508 | * Abort all pending SCSI commands for a port by closing the | |
835dc298 CS |
509 | * port. Using a reopen avoids a conflict with a shutdown |
510 | * overwriting a reopen. The "forced" ensures that a disappeared port | |
511 | * is not opened again as valid due to the cached plogi data in | |
512 | * non-NPIV mode. | |
a2fa0aed CS |
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 | 520 | |
ea945ff8 | 521 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
a2fa0aed | 522 | |
70932935 | 523 | if (port) { |
835dc298 | 524 | zfcp_erp_port_forced_reopen(port, 0, "sctrpi1", NULL); |
615f59e0 | 525 | put_device(&port->dev); |
70932935 | 526 | } |
a2fa0aed CS |
527 | } |
528 | ||
5a7de559 CS |
529 | static void zfcp_scsi_queue_unit_register(struct zfcp_port *port) |
530 | { | |
531 | struct zfcp_unit *unit; | |
532 | ||
533 | read_lock_irq(&port->unit_list_lock); | |
534 | list_for_each_entry(unit, &port->unit_list, list) { | |
535 | get_device(&unit->dev); | |
536 | if (scsi_queue_work(port->adapter->scsi_host, | |
537 | &unit->scsi_work) <= 0) | |
538 | put_device(&unit->dev); | |
539 | } | |
540 | read_unlock_irq(&port->unit_list_lock); | |
541 | } | |
542 | ||
a2fa0aed CS |
543 | static void zfcp_scsi_rport_register(struct zfcp_port *port) |
544 | { | |
545 | struct fc_rport_identifiers ids; | |
546 | struct fc_rport *rport; | |
547 | ||
379d6bf6 CS |
548 | if (port->rport) |
549 | return; | |
550 | ||
a2fa0aed CS |
551 | ids.node_name = port->wwnn; |
552 | ids.port_name = port->wwpn; | |
553 | ids.port_id = port->d_id; | |
554 | ids.roles = FC_RPORT_ROLE_FCP_TARGET; | |
555 | ||
556 | rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); | |
557 | if (!rport) { | |
558 | dev_err(&port->adapter->ccw_device->dev, | |
559 | "Registering port 0x%016Lx failed\n", | |
560 | (unsigned long long)port->wwpn); | |
561 | return; | |
562 | } | |
563 | ||
a2fa0aed CS |
564 | rport->maxframe_size = port->maxframe_size; |
565 | rport->supported_classes = port->supported_classes; | |
566 | port->rport = rport; | |
5a7de559 CS |
567 | |
568 | zfcp_scsi_queue_unit_register(port); | |
a2fa0aed CS |
569 | } |
570 | ||
571 | static void zfcp_scsi_rport_block(struct zfcp_port *port) | |
572 | { | |
70932935 CS |
573 | struct fc_rport *rport = port->rport; |
574 | ||
379d6bf6 | 575 | if (rport) { |
70932935 | 576 | fc_remote_port_delete(rport); |
379d6bf6 CS |
577 | port->rport = NULL; |
578 | } | |
a2fa0aed CS |
579 | } |
580 | ||
581 | void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) | |
582 | { | |
615f59e0 | 583 | get_device(&port->dev); |
a2fa0aed CS |
584 | port->rport_task = RPORT_ADD; |
585 | ||
4544683a | 586 | if (!queue_work(port->adapter->work_queue, &port->rport_work)) |
615f59e0 | 587 | put_device(&port->dev); |
a2fa0aed CS |
588 | } |
589 | ||
590 | void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) | |
591 | { | |
615f59e0 | 592 | get_device(&port->dev); |
a2fa0aed CS |
593 | port->rport_task = RPORT_DEL; |
594 | ||
4544683a SS |
595 | if (port->rport && queue_work(port->adapter->work_queue, |
596 | &port->rport_work)) | |
a67417ab SS |
597 | return; |
598 | ||
615f59e0 | 599 | put_device(&port->dev); |
a2fa0aed CS |
600 | } |
601 | ||
602 | void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) | |
603 | { | |
ecf0c772 | 604 | unsigned long flags; |
a2fa0aed CS |
605 | struct zfcp_port *port; |
606 | ||
ecf0c772 SS |
607 | read_lock_irqsave(&adapter->port_list_lock, flags); |
608 | list_for_each_entry(port, &adapter->port_list, list) | |
a2fa0aed | 609 | zfcp_scsi_schedule_rport_block(port); |
ecf0c772 | 610 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
a2fa0aed CS |
611 | } |
612 | ||
613 | void zfcp_scsi_rport_work(struct work_struct *work) | |
614 | { | |
615 | struct zfcp_port *port = container_of(work, struct zfcp_port, | |
616 | rport_work); | |
617 | ||
618 | while (port->rport_task) { | |
619 | if (port->rport_task == RPORT_ADD) { | |
620 | port->rport_task = RPORT_NONE; | |
621 | zfcp_scsi_rport_register(port); | |
622 | } else { | |
623 | port->rport_task = RPORT_NONE; | |
624 | zfcp_scsi_rport_block(port); | |
625 | } | |
626 | } | |
627 | ||
615f59e0 | 628 | put_device(&port->dev); |
a2fa0aed CS |
629 | } |
630 | ||
5a7de559 CS |
631 | /** |
632 | * zfcp_scsi_scan - Register LUN with SCSI midlayer | |
633 | * @unit: The LUN/unit to register | |
634 | */ | |
635 | void zfcp_scsi_scan(struct zfcp_unit *unit) | |
92d5193b | 636 | { |
5a7de559 | 637 | struct fc_rport *rport = unit->port->rport; |
92d5193b SS |
638 | |
639 | if (rport && rport->port_state == FC_PORTSTATE_ONLINE) | |
640 | scsi_scan_target(&rport->dev, 0, rport->scsi_target_id, | |
641 | scsilun_to_int((struct scsi_lun *) | |
642 | &unit->fcp_lun), 0); | |
5a7de559 CS |
643 | } |
644 | ||
645 | void zfcp_scsi_scan_work(struct work_struct *work) | |
646 | { | |
647 | struct zfcp_unit *unit = container_of(work, struct zfcp_unit, | |
648 | scsi_work); | |
92d5193b | 649 | |
5a7de559 | 650 | zfcp_scsi_scan(unit); |
615f59e0 | 651 | put_device(&unit->dev); |
92d5193b SS |
652 | } |
653 | ||
1da177e4 | 654 | struct fc_function_template zfcp_transport_functions = { |
1da177e4 LT |
655 | .show_starget_port_id = 1, |
656 | .show_starget_port_name = 1, | |
657 | .show_starget_node_name = 1, | |
3859f6a2 | 658 | .show_rport_supported_classes = 1, |
75bfc283 | 659 | .show_rport_maxframe_size = 1, |
338151e0 | 660 | .show_rport_dev_loss_tmo = 1, |
3859f6a2 AH |
661 | .show_host_node_name = 1, |
662 | .show_host_port_name = 1, | |
ad757cdf | 663 | .show_host_permanent_port_name = 1, |
3859f6a2 | 664 | .show_host_supported_classes = 1, |
0fdd2133 | 665 | .show_host_supported_fc4s = 1, |
ad757cdf | 666 | .show_host_supported_speeds = 1, |
13e1e1f0 | 667 | .show_host_maxframe_size = 1, |
3859f6a2 | 668 | .show_host_serial_number = 1, |
f6cd94b1 AH |
669 | .get_fc_host_stats = zfcp_get_fc_host_stats, |
670 | .reset_fc_host_stats = zfcp_reset_fc_host_stats, | |
338151e0 | 671 | .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, |
85a82392 | 672 | .get_host_port_state = zfcp_get_host_port_state, |
a2fa0aed | 673 | .terminate_rport_io = zfcp_scsi_terminate_rport_io, |
85a82392 | 674 | .show_host_port_state = 1, |
0fdd2133 | 675 | .show_host_active_fc4s = 1, |
7c7dc196 | 676 | .bsg_request = zfcp_fc_exec_bsg_job, |
491ca442 | 677 | .bsg_timeout = zfcp_fc_timeout_bsg_job, |
f6cd94b1 AH |
678 | /* no functions registered for following dynamic attributes but |
679 | directly set by LLDD */ | |
ad757cdf | 680 | .show_host_port_type = 1, |
13e1e1f0 AH |
681 | .show_host_speed = 1, |
682 | .show_host_port_id = 1, | |
52ef11a7 | 683 | .disable_target_scan = 1, |
7c7dc196 | 684 | .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), |
1da177e4 LT |
685 | }; |
686 | ||
f76af7d7 MP |
687 | struct zfcp_data zfcp_data = { |
688 | .scsi_host_template = { | |
689 | .name = "zfcp", | |
690 | .module = THIS_MODULE, | |
691 | .proc_name = "zfcp", | |
a40a1baf | 692 | .change_queue_depth = zfcp_scsi_change_queue_depth, |
f76af7d7 MP |
693 | .slave_alloc = zfcp_scsi_slave_alloc, |
694 | .slave_configure = zfcp_scsi_slave_configure, | |
695 | .slave_destroy = zfcp_scsi_slave_destroy, | |
696 | .queuecommand = zfcp_scsi_queuecommand, | |
697 | .eh_abort_handler = zfcp_scsi_eh_abort_handler, | |
698 | .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, | |
699 | .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, | |
700 | .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, | |
701 | .can_queue = 4096, | |
702 | .this_id = -1, | |
1674b405 | 703 | .sg_tablesize = ZFCP_FSF_MAX_SBALES_PER_REQ, |
f76af7d7 MP |
704 | .cmd_per_lun = 1, |
705 | .use_clustering = 1, | |
706 | .sdev_attrs = zfcp_sysfs_sdev_attrs, | |
1674b405 | 707 | .max_sectors = (ZFCP_FSF_MAX_SBALES_PER_REQ * 8), |
68322984 | 708 | .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, |
60221920 | 709 | .shost_attrs = zfcp_sysfs_shost_attrs, |
f76af7d7 MP |
710 | }, |
711 | }; |