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 | ||
4318e08c CS |
12 | #include <linux/types.h> |
13 | #include <scsi/fc/fc_fcp.h> | |
5f852be9 | 14 | #include <asm/atomic.h> |
dcd20e23 CS |
15 | #include "zfcp_ext.h" |
16 | #include "zfcp_dbf.h" | |
7c7dc196 | 17 | #include "zfcp_fc.h" |
1da177e4 | 18 | |
a40a1baf CS |
19 | static unsigned int default_depth = 32; |
20 | module_param_named(queue_depth, default_depth, uint, 0600); | |
21 | MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices"); | |
22 | ||
e881a172 MC |
23 | static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth, |
24 | int reason) | |
a40a1baf | 25 | { |
42e62a74 CS |
26 | switch (reason) { |
27 | case SCSI_QDEPTH_DEFAULT: | |
28 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
29 | break; | |
30 | case SCSI_QDEPTH_QFULL: | |
31 | scsi_track_queue_full(sdev, depth); | |
32 | break; | |
33 | case SCSI_QDEPTH_RAMP_UP: | |
34 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
35 | break; | |
36 | default: | |
e881a172 | 37 | return -EOPNOTSUPP; |
42e62a74 | 38 | } |
a40a1baf CS |
39 | return sdev->queue_depth; |
40 | } | |
41 | ||
f6c0e7a7 | 42 | static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) |
1da177e4 LT |
43 | { |
44 | struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata; | |
26816f1c | 45 | unit->device = NULL; |
f3450c7b | 46 | put_device(&unit->sysfs_device); |
1da177e4 LT |
47 | } |
48 | ||
f76af7d7 | 49 | static int zfcp_scsi_slave_configure(struct scsi_device *sdp) |
1da177e4 LT |
50 | { |
51 | if (sdp->tagged_supported) | |
a40a1baf | 52 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth); |
1da177e4 LT |
53 | else |
54 | scsi_adjust_queue_depth(sdp, 0, 1); | |
55 | return 0; | |
56 | } | |
57 | ||
f76af7d7 | 58 | static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) |
1da177e4 | 59 | { |
5771710b SS |
60 | struct zfcp_adapter *adapter = |
61 | (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; | |
feac6a07 | 62 | set_host_byte(scpnt, result); |
8a36e453 | 63 | if ((scpnt->device != NULL) && (scpnt->device->host != NULL)) |
5771710b | 64 | zfcp_dbf_scsi_result("fail", 4, adapter->dbf, scpnt, NULL); |
1da177e4 LT |
65 | /* return directly */ |
66 | scpnt->scsi_done(scpnt); | |
67 | } | |
68 | ||
f76af7d7 MP |
69 | static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, |
70 | void (*done) (struct scsi_cmnd *)) | |
1da177e4 LT |
71 | { |
72 | struct zfcp_unit *unit; | |
73 | struct zfcp_adapter *adapter; | |
a2fa0aed CS |
74 | int status, scsi_result, ret; |
75 | struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); | |
1da177e4 LT |
76 | |
77 | /* reset the status for this request */ | |
78 | scpnt->result = 0; | |
79 | scpnt->host_scribble = NULL; | |
80 | scpnt->scsi_done = done; | |
81 | ||
82 | /* | |
83 | * figure out adapter and target device | |
84 | * (stored there by zfcp_scsi_slave_alloc) | |
85 | */ | |
86 | adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; | |
f76af7d7 MP |
87 | unit = scpnt->device->hostdata; |
88 | ||
89 | BUG_ON(!adapter || (adapter != unit->port->adapter)); | |
90 | BUG_ON(!scpnt->scsi_done); | |
91 | ||
92 | if (unlikely(!unit)) { | |
93 | zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT); | |
94 | return 0; | |
95 | } | |
96 | ||
a2fa0aed CS |
97 | scsi_result = fc_remote_port_chkready(rport); |
98 | if (unlikely(scsi_result)) { | |
99 | scpnt->result = scsi_result; | |
5771710b | 100 | zfcp_dbf_scsi_result("fail", 4, adapter->dbf, scpnt, NULL); |
a2fa0aed CS |
101 | scpnt->scsi_done(scpnt); |
102 | return 0; | |
103 | } | |
104 | ||
f76af7d7 | 105 | status = atomic_read(&unit->status); |
8830271c CS |
106 | if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) && |
107 | !(atomic_read(&unit->port->status) & | |
108 | ZFCP_STATUS_COMMON_ERP_FAILED)) { | |
109 | /* only unit access denied, but port is good | |
110 | * not covered by FC transport, have to fail here */ | |
f76af7d7 | 111 | zfcp_scsi_command_fail(scpnt, DID_ERROR); |
a419aef8 | 112 | return 0; |
f76af7d7 MP |
113 | } |
114 | ||
8830271c CS |
115 | if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { |
116 | /* This could be either | |
117 | * open unit pending: this is temporary, will result in | |
118 | * open unit or ERP_FAILED, so retry command | |
119 | * call to rport_delete pending: mimic retry from | |
120 | * fc_remote_port_chkready until rport is BLOCKED | |
121 | */ | |
122 | zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY); | |
123 | return 0; | |
124 | } | |
125 | ||
63caf367 | 126 | ret = zfcp_fsf_send_fcp_command_task(unit, scpnt); |
f76af7d7 | 127 | if (unlikely(ret == -EBUSY)) |
f7a65e92 | 128 | return SCSI_MLQUEUE_DEVICE_BUSY; |
f76af7d7 MP |
129 | else if (unlikely(ret < 0)) |
130 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 131 | |
f76af7d7 | 132 | return ret; |
1da177e4 LT |
133 | } |
134 | ||
f76af7d7 | 135 | static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter, |
ecf0c772 | 136 | unsigned int id, u64 lun) |
1da177e4 | 137 | { |
ecf0c772 | 138 | unsigned long flags; |
1da177e4 | 139 | struct zfcp_port *port; |
ecf0c772 | 140 | struct zfcp_unit *unit = NULL; |
1da177e4 | 141 | |
ecf0c772 SS |
142 | read_lock_irqsave(&adapter->port_list_lock, flags); |
143 | list_for_each_entry(port, &adapter->port_list, list) { | |
3859f6a2 | 144 | if (!port->rport || (id != port->rport->scsi_target_id)) |
1da177e4 | 145 | continue; |
ecf0c772 SS |
146 | unit = zfcp_get_unit_by_lun(port, lun); |
147 | if (unit) | |
148 | break; | |
1da177e4 | 149 | } |
ecf0c772 | 150 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
f76af7d7 | 151 | |
ecf0c772 | 152 | return unit; |
f76af7d7 MP |
153 | } |
154 | ||
155 | static int zfcp_scsi_slave_alloc(struct scsi_device *sdp) | |
156 | { | |
157 | struct zfcp_adapter *adapter; | |
158 | struct zfcp_unit *unit; | |
ecf0c772 | 159 | u64 lun; |
f76af7d7 MP |
160 | |
161 | adapter = (struct zfcp_adapter *) sdp->host->hostdata[0]; | |
162 | if (!adapter) | |
163 | goto out; | |
164 | ||
ecf0c772 SS |
165 | int_to_scsilun(sdp->lun, (struct scsi_lun *)&lun); |
166 | unit = zfcp_unit_lookup(adapter, sdp->id, lun); | |
86f8a1b4 | 167 | if (unit) { |
f76af7d7 MP |
168 | sdp->hostdata = unit; |
169 | unit->device = sdp; | |
ecf0c772 | 170 | return 0; |
f76af7d7 | 171 | } |
f76af7d7 | 172 | out: |
ecf0c772 | 173 | return -ENXIO; |
1da177e4 LT |
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); | |
af4de36d | 212 | fc_block_scsi_eh(scpnt); |
63caf367 CS |
213 | if (!(atomic_read(&adapter->status) & |
214 | ZFCP_STATUS_COMMON_RUNNING)) { | |
5771710b SS |
215 | zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL, |
216 | old_reqid); | |
63caf367 CS |
217 | return SUCCESS; |
218 | } | |
1da177e4 | 219 | } |
63caf367 CS |
220 | if (!abrt_req) |
221 | return FAILED; | |
1da177e4 | 222 | |
058b8647 | 223 | wait_for_completion(&abrt_req->completion); |
059c97d0 | 224 | |
63caf367 | 225 | if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) |
a11a52be | 226 | dbf_tag = "okay"; |
63caf367 | 227 | else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) |
a11a52be | 228 | dbf_tag = "lte2"; |
63caf367 | 229 | else { |
a11a52be | 230 | dbf_tag = "fail"; |
1da177e4 | 231 | retval = FAILED; |
1da177e4 | 232 | } |
5771710b | 233 | zfcp_dbf_scsi_abort(dbf_tag, adapter->dbf, scpnt, abrt_req, old_reqid); |
63caf367 | 234 | zfcp_fsf_req_free(abrt_req); |
f76af7d7 | 235 | return retval; |
1da177e4 LT |
236 | } |
237 | ||
63caf367 | 238 | static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) |
1da177e4 | 239 | { |
63caf367 | 240 | struct zfcp_unit *unit = scpnt->device->hostdata; |
1da177e4 | 241 | struct zfcp_adapter *adapter = unit->port->adapter; |
564e1c86 | 242 | struct zfcp_fsf_req *fsf_req = NULL; |
f76af7d7 | 243 | int retval = SUCCESS; |
63caf367 CS |
244 | int retry = 3; |
245 | ||
246 | while (retry--) { | |
247 | fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags); | |
248 | if (fsf_req) | |
249 | break; | |
250 | ||
251 | zfcp_erp_wait(adapter); | |
af4de36d | 252 | fc_block_scsi_eh(scpnt); |
63caf367 CS |
253 | if (!(atomic_read(&adapter->status) & |
254 | ZFCP_STATUS_COMMON_RUNNING)) { | |
5771710b | 255 | zfcp_dbf_scsi_devreset("nres", tm_flags, unit, scpnt); |
63caf367 CS |
256 | return SUCCESS; |
257 | } | |
1da177e4 | 258 | } |
63caf367 CS |
259 | if (!fsf_req) |
260 | return FAILED; | |
1da177e4 | 261 | |
058b8647 | 262 | wait_for_completion(&fsf_req->completion); |
77eb1699 | 263 | |
8a36e453 | 264 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { |
5771710b | 265 | zfcp_dbf_scsi_devreset("fail", tm_flags, unit, scpnt); |
f76af7d7 | 266 | retval = FAILED; |
8a36e453 | 267 | } else |
5771710b | 268 | zfcp_dbf_scsi_devreset("okay", tm_flags, unit, scpnt); |
77eb1699 AH |
269 | |
270 | zfcp_fsf_req_free(fsf_req); | |
1da177e4 LT |
271 | return retval; |
272 | } | |
273 | ||
f76af7d7 MP |
274 | static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) |
275 | { | |
4318e08c | 276 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); |
f76af7d7 MP |
277 | } |
278 | ||
279 | static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) | |
280 | { | |
4318e08c | 281 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); |
f76af7d7 MP |
282 | } |
283 | ||
2b67fc46 | 284 | static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 285 | { |
63caf367 CS |
286 | struct zfcp_unit *unit = scpnt->device->hostdata; |
287 | struct zfcp_adapter *adapter = unit->port->adapter; | |
1da177e4 | 288 | |
5ffd51a5 | 289 | zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt); |
81654286 | 290 | zfcp_erp_wait(adapter); |
af4de36d | 291 | fc_block_scsi_eh(scpnt); |
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 | 318 | adapter->scsi_host->unique_id = dev_id.devno; |
4318e08c | 319 | adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ |
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 | |
ecf0c772 SS |
341 | read_lock_irq(&adapter->port_list_lock); |
342 | list_for_each_entry(port, &adapter->port_list, list) | |
f3450c7b | 343 | port->rport = NULL; |
ecf0c772 | 344 | read_unlock_irq(&adapter->port_list_lock); |
f76af7d7 | 345 | |
3859f6a2 | 346 | fc_remove_host(shost); |
1da177e4 LT |
347 | scsi_remove_host(shost); |
348 | scsi_host_put(shost); | |
349 | adapter->scsi_host = NULL; | |
1da177e4 LT |
350 | |
351 | return; | |
352 | } | |
353 | ||
f6cd94b1 AH |
354 | static struct fc_host_statistics* |
355 | zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) | |
1da177e4 | 356 | { |
f6cd94b1 | 357 | struct fc_host_statistics *fc_stats; |
1da177e4 | 358 | |
f6cd94b1 AH |
359 | if (!adapter->fc_stats) { |
360 | fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); | |
361 | if (!fc_stats) | |
362 | return NULL; | |
f3450c7b | 363 | adapter->fc_stats = fc_stats; /* freed in adapter_release */ |
f6cd94b1 AH |
364 | } |
365 | memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); | |
366 | return adapter->fc_stats; | |
1da177e4 LT |
367 | } |
368 | ||
f76af7d7 MP |
369 | static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, |
370 | struct fsf_qtcb_bottom_port *data, | |
371 | struct fsf_qtcb_bottom_port *old) | |
1da177e4 | 372 | { |
f76af7d7 MP |
373 | fc_stats->seconds_since_last_reset = |
374 | data->seconds_since_last_reset - old->seconds_since_last_reset; | |
f6cd94b1 AH |
375 | fc_stats->tx_frames = data->tx_frames - old->tx_frames; |
376 | fc_stats->tx_words = data->tx_words - old->tx_words; | |
377 | fc_stats->rx_frames = data->rx_frames - old->rx_frames; | |
378 | fc_stats->rx_words = data->rx_words - old->rx_words; | |
379 | fc_stats->lip_count = data->lip - old->lip; | |
380 | fc_stats->nos_count = data->nos - old->nos; | |
381 | fc_stats->error_frames = data->error_frames - old->error_frames; | |
382 | fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; | |
383 | fc_stats->link_failure_count = data->link_failure - old->link_failure; | |
384 | fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; | |
f76af7d7 MP |
385 | fc_stats->loss_of_signal_count = |
386 | data->loss_of_signal - old->loss_of_signal; | |
387 | fc_stats->prim_seq_protocol_err_count = | |
388 | data->psp_error_counts - old->psp_error_counts; | |
389 | fc_stats->invalid_tx_word_count = | |
390 | data->invalid_tx_words - old->invalid_tx_words; | |
f6cd94b1 | 391 | fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; |
f76af7d7 MP |
392 | fc_stats->fcp_input_requests = |
393 | data->input_requests - old->input_requests; | |
394 | fc_stats->fcp_output_requests = | |
395 | data->output_requests - old->output_requests; | |
396 | fc_stats->fcp_control_requests = | |
397 | data->control_requests - old->control_requests; | |
f6cd94b1 AH |
398 | fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; |
399 | fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; | |
400 | } | |
1da177e4 | 401 | |
f76af7d7 MP |
402 | static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, |
403 | struct fsf_qtcb_bottom_port *data) | |
f6cd94b1 AH |
404 | { |
405 | fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; | |
406 | fc_stats->tx_frames = data->tx_frames; | |
407 | fc_stats->tx_words = data->tx_words; | |
408 | fc_stats->rx_frames = data->rx_frames; | |
409 | fc_stats->rx_words = data->rx_words; | |
410 | fc_stats->lip_count = data->lip; | |
411 | fc_stats->nos_count = data->nos; | |
412 | fc_stats->error_frames = data->error_frames; | |
413 | fc_stats->dumped_frames = data->dumped_frames; | |
414 | fc_stats->link_failure_count = data->link_failure; | |
415 | fc_stats->loss_of_sync_count = data->loss_of_sync; | |
416 | fc_stats->loss_of_signal_count = data->loss_of_signal; | |
417 | fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; | |
418 | fc_stats->invalid_tx_word_count = data->invalid_tx_words; | |
419 | fc_stats->invalid_crc_count = data->invalid_crcs; | |
420 | fc_stats->fcp_input_requests = data->input_requests; | |
421 | fc_stats->fcp_output_requests = data->output_requests; | |
422 | fc_stats->fcp_control_requests = data->control_requests; | |
423 | fc_stats->fcp_input_megabytes = data->input_mb; | |
424 | fc_stats->fcp_output_megabytes = data->output_mb; | |
425 | } | |
426 | ||
f76af7d7 | 427 | static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) |
f6cd94b1 AH |
428 | { |
429 | struct zfcp_adapter *adapter; | |
430 | struct fc_host_statistics *fc_stats; | |
431 | struct fsf_qtcb_bottom_port *data; | |
432 | int ret; | |
433 | ||
f76af7d7 | 434 | adapter = (struct zfcp_adapter *)host->hostdata[0]; |
f6cd94b1 AH |
435 | fc_stats = zfcp_init_fc_host_stats(adapter); |
436 | if (!fc_stats) | |
437 | return NULL; | |
438 | ||
ec4081c6 | 439 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
440 | if (!data) |
441 | return NULL; | |
f6cd94b1 | 442 | |
564e1c86 | 443 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f6cd94b1 AH |
444 | if (ret) { |
445 | kfree(data); | |
f76af7d7 | 446 | return NULL; |
f6cd94b1 AH |
447 | } |
448 | ||
449 | if (adapter->stats_reset && | |
450 | ((jiffies/HZ - adapter->stats_reset) < | |
f76af7d7 | 451 | data->seconds_since_last_reset)) |
f6cd94b1 AH |
452 | zfcp_adjust_fc_host_stats(fc_stats, data, |
453 | adapter->stats_reset_data); | |
f76af7d7 | 454 | else |
f6cd94b1 AH |
455 | zfcp_set_fc_host_stats(fc_stats, data); |
456 | ||
457 | kfree(data); | |
458 | return fc_stats; | |
1da177e4 LT |
459 | } |
460 | ||
f76af7d7 | 461 | static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) |
1da177e4 | 462 | { |
f6cd94b1 | 463 | struct zfcp_adapter *adapter; |
f76af7d7 | 464 | struct fsf_qtcb_bottom_port *data; |
f6cd94b1 | 465 | int ret; |
1da177e4 | 466 | |
f6cd94b1 | 467 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; |
ec4081c6 | 468 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
469 | if (!data) |
470 | return; | |
f6cd94b1 | 471 | |
564e1c86 | 472 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f76af7d7 | 473 | if (ret) |
83f6d6d7 | 474 | kfree(data); |
f76af7d7 | 475 | else { |
f6cd94b1 | 476 | adapter->stats_reset = jiffies/HZ; |
f76af7d7 | 477 | kfree(adapter->stats_reset_data); |
f6cd94b1 | 478 | adapter->stats_reset_data = data; /* finally freed in |
f3450c7b | 479 | adapter_release */ |
f6cd94b1 | 480 | } |
1da177e4 LT |
481 | } |
482 | ||
85a82392 SS |
483 | static void zfcp_get_host_port_state(struct Scsi_Host *shost) |
484 | { | |
485 | struct zfcp_adapter *adapter = | |
486 | (struct zfcp_adapter *)shost->hostdata[0]; | |
487 | int status = atomic_read(&adapter->status); | |
488 | ||
489 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && | |
490 | !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) | |
491 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
492 | else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) | |
493 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
494 | else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
495 | fc_host_port_state(shost) = FC_PORTSTATE_ERROR; | |
496 | else | |
497 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
498 | } | |
499 | ||
338151e0 AH |
500 | static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
501 | { | |
502 | rport->dev_loss_tmo = timeout; | |
503 | } | |
504 | ||
a2fa0aed CS |
505 | /** |
506 | * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport | |
507 | * @rport: The FC rport where to teminate I/O | |
508 | * | |
509 | * Abort all pending SCSI commands for a port by closing the | |
ecf0c772 | 510 | * port. Using a reopen avoiding a conflict with a shutdown |
a2fa0aed CS |
511 | * overwriting a reopen. |
512 | */ | |
513 | static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) | |
514 | { | |
70932935 | 515 | struct zfcp_port *port; |
ea945ff8 SS |
516 | struct Scsi_Host *shost = rport_to_shost(rport); |
517 | struct zfcp_adapter *adapter = | |
518 | (struct zfcp_adapter *)shost->hostdata[0]; | |
70932935 | 519 | |
ea945ff8 | 520 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
a2fa0aed | 521 | |
70932935 CS |
522 | if (port) { |
523 | zfcp_erp_port_reopen(port, 0, "sctrpi1", NULL); | |
f3450c7b | 524 | put_device(&port->sysfs_device); |
70932935 | 525 | } |
a2fa0aed CS |
526 | } |
527 | ||
528 | static void zfcp_scsi_rport_register(struct zfcp_port *port) | |
529 | { | |
530 | struct fc_rport_identifiers ids; | |
531 | struct fc_rport *rport; | |
532 | ||
379d6bf6 CS |
533 | if (port->rport) |
534 | return; | |
535 | ||
a2fa0aed CS |
536 | ids.node_name = port->wwnn; |
537 | ids.port_name = port->wwpn; | |
538 | ids.port_id = port->d_id; | |
539 | ids.roles = FC_RPORT_ROLE_FCP_TARGET; | |
540 | ||
541 | rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); | |
542 | if (!rport) { | |
543 | dev_err(&port->adapter->ccw_device->dev, | |
544 | "Registering port 0x%016Lx failed\n", | |
545 | (unsigned long long)port->wwpn); | |
546 | return; | |
547 | } | |
548 | ||
a2fa0aed CS |
549 | rport->maxframe_size = port->maxframe_size; |
550 | rport->supported_classes = port->supported_classes; | |
551 | port->rport = rport; | |
552 | } | |
553 | ||
554 | static void zfcp_scsi_rport_block(struct zfcp_port *port) | |
555 | { | |
70932935 CS |
556 | struct fc_rport *rport = port->rport; |
557 | ||
379d6bf6 | 558 | if (rport) { |
70932935 | 559 | fc_remote_port_delete(rport); |
379d6bf6 CS |
560 | port->rport = NULL; |
561 | } | |
a2fa0aed CS |
562 | } |
563 | ||
564 | void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) | |
565 | { | |
f3450c7b | 566 | get_device(&port->sysfs_device); |
a2fa0aed CS |
567 | port->rport_task = RPORT_ADD; |
568 | ||
4544683a | 569 | if (!queue_work(port->adapter->work_queue, &port->rport_work)) |
f3450c7b | 570 | put_device(&port->sysfs_device); |
a2fa0aed CS |
571 | } |
572 | ||
573 | void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) | |
574 | { | |
f3450c7b | 575 | get_device(&port->sysfs_device); |
a2fa0aed CS |
576 | port->rport_task = RPORT_DEL; |
577 | ||
4544683a SS |
578 | if (port->rport && queue_work(port->adapter->work_queue, |
579 | &port->rport_work)) | |
a67417ab SS |
580 | return; |
581 | ||
f3450c7b | 582 | put_device(&port->sysfs_device); |
a2fa0aed CS |
583 | } |
584 | ||
585 | void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) | |
586 | { | |
ecf0c772 | 587 | unsigned long flags; |
a2fa0aed CS |
588 | struct zfcp_port *port; |
589 | ||
ecf0c772 SS |
590 | read_lock_irqsave(&adapter->port_list_lock, flags); |
591 | list_for_each_entry(port, &adapter->port_list, list) | |
a2fa0aed | 592 | zfcp_scsi_schedule_rport_block(port); |
ecf0c772 | 593 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
a2fa0aed CS |
594 | } |
595 | ||
596 | void zfcp_scsi_rport_work(struct work_struct *work) | |
597 | { | |
598 | struct zfcp_port *port = container_of(work, struct zfcp_port, | |
599 | rport_work); | |
600 | ||
601 | while (port->rport_task) { | |
602 | if (port->rport_task == RPORT_ADD) { | |
603 | port->rport_task = RPORT_NONE; | |
604 | zfcp_scsi_rport_register(port); | |
605 | } else { | |
606 | port->rport_task = RPORT_NONE; | |
607 | zfcp_scsi_rport_block(port); | |
608 | } | |
609 | } | |
610 | ||
f3450c7b | 611 | put_device(&port->sysfs_device); |
a2fa0aed CS |
612 | } |
613 | ||
614 | ||
92d5193b SS |
615 | void zfcp_scsi_scan(struct work_struct *work) |
616 | { | |
617 | struct zfcp_unit *unit = container_of(work, struct zfcp_unit, | |
618 | scsi_work); | |
619 | struct fc_rport *rport; | |
620 | ||
621 | flush_work(&unit->port->rport_work); | |
622 | rport = unit->port->rport; | |
623 | ||
624 | if (rport && rport->port_state == FC_PORTSTATE_ONLINE) | |
625 | scsi_scan_target(&rport->dev, 0, rport->scsi_target_id, | |
626 | scsilun_to_int((struct scsi_lun *) | |
627 | &unit->fcp_lun), 0); | |
628 | ||
f3450c7b | 629 | put_device(&unit->sysfs_device); |
92d5193b SS |
630 | } |
631 | ||
1da177e4 | 632 | struct fc_function_template zfcp_transport_functions = { |
1da177e4 LT |
633 | .show_starget_port_id = 1, |
634 | .show_starget_port_name = 1, | |
635 | .show_starget_node_name = 1, | |
3859f6a2 | 636 | .show_rport_supported_classes = 1, |
75bfc283 | 637 | .show_rport_maxframe_size = 1, |
338151e0 | 638 | .show_rport_dev_loss_tmo = 1, |
3859f6a2 AH |
639 | .show_host_node_name = 1, |
640 | .show_host_port_name = 1, | |
ad757cdf | 641 | .show_host_permanent_port_name = 1, |
3859f6a2 | 642 | .show_host_supported_classes = 1, |
0fdd2133 | 643 | .show_host_supported_fc4s = 1, |
ad757cdf | 644 | .show_host_supported_speeds = 1, |
13e1e1f0 | 645 | .show_host_maxframe_size = 1, |
3859f6a2 | 646 | .show_host_serial_number = 1, |
f6cd94b1 AH |
647 | .get_fc_host_stats = zfcp_get_fc_host_stats, |
648 | .reset_fc_host_stats = zfcp_reset_fc_host_stats, | |
338151e0 | 649 | .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, |
85a82392 | 650 | .get_host_port_state = zfcp_get_host_port_state, |
a2fa0aed | 651 | .terminate_rport_io = zfcp_scsi_terminate_rport_io, |
85a82392 | 652 | .show_host_port_state = 1, |
0fdd2133 | 653 | .show_host_active_fc4s = 1, |
7c7dc196 | 654 | .bsg_request = zfcp_fc_exec_bsg_job, |
491ca442 | 655 | .bsg_timeout = zfcp_fc_timeout_bsg_job, |
f6cd94b1 AH |
656 | /* no functions registered for following dynamic attributes but |
657 | directly set by LLDD */ | |
ad757cdf | 658 | .show_host_port_type = 1, |
13e1e1f0 AH |
659 | .show_host_speed = 1, |
660 | .show_host_port_id = 1, | |
52ef11a7 | 661 | .disable_target_scan = 1, |
7c7dc196 | 662 | .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), |
1da177e4 LT |
663 | }; |
664 | ||
f76af7d7 MP |
665 | struct zfcp_data zfcp_data = { |
666 | .scsi_host_template = { | |
667 | .name = "zfcp", | |
668 | .module = THIS_MODULE, | |
669 | .proc_name = "zfcp", | |
a40a1baf | 670 | .change_queue_depth = zfcp_scsi_change_queue_depth, |
f76af7d7 MP |
671 | .slave_alloc = zfcp_scsi_slave_alloc, |
672 | .slave_configure = zfcp_scsi_slave_configure, | |
673 | .slave_destroy = zfcp_scsi_slave_destroy, | |
674 | .queuecommand = zfcp_scsi_queuecommand, | |
675 | .eh_abort_handler = zfcp_scsi_eh_abort_handler, | |
676 | .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, | |
677 | .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, | |
678 | .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, | |
679 | .can_queue = 4096, | |
680 | .this_id = -1, | |
681 | .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ, | |
682 | .cmd_per_lun = 1, | |
683 | .use_clustering = 1, | |
684 | .sdev_attrs = zfcp_sysfs_sdev_attrs, | |
685 | .max_sectors = (ZFCP_MAX_SBALES_PER_REQ * 8), | |
60221920 | 686 | .shost_attrs = zfcp_sysfs_shost_attrs, |
f76af7d7 MP |
687 | }, |
688 | }; |