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> |
ef3eb71d | 15 | #include <scsi/scsi_eh.h> |
5f852be9 | 16 | #include <asm/atomic.h> |
dcd20e23 CS |
17 | #include "zfcp_ext.h" |
18 | #include "zfcp_dbf.h" | |
7c7dc196 | 19 | #include "zfcp_fc.h" |
b6bd2fb9 | 20 | #include "zfcp_reqlist.h" |
1da177e4 | 21 | |
a40a1baf CS |
22 | static unsigned int default_depth = 32; |
23 | module_param_named(queue_depth, default_depth, uint, 0600); | |
24 | MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices"); | |
25 | ||
ef3eb71d FB |
26 | static bool enable_dif; |
27 | ||
28 | #ifdef CONFIG_ZFCP_DIF | |
29 | module_param_named(dif, enable_dif, bool, 0600); | |
30 | MODULE_PARM_DESC(dif, "Enable DIF/DIX data integrity support"); | |
31 | #endif | |
32 | ||
e881a172 MC |
33 | static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth, |
34 | int reason) | |
a40a1baf | 35 | { |
42e62a74 CS |
36 | switch (reason) { |
37 | case SCSI_QDEPTH_DEFAULT: | |
38 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
39 | break; | |
40 | case SCSI_QDEPTH_QFULL: | |
41 | scsi_track_queue_full(sdev, depth); | |
42 | break; | |
43 | case SCSI_QDEPTH_RAMP_UP: | |
44 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
45 | break; | |
46 | default: | |
e881a172 | 47 | return -EOPNOTSUPP; |
42e62a74 | 48 | } |
a40a1baf CS |
49 | return sdev->queue_depth; |
50 | } | |
51 | ||
b62a8d9b | 52 | static void zfcp_scsi_slave_destroy(struct scsi_device *sdev) |
1da177e4 | 53 | { |
b62a8d9b CS |
54 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
55 | ||
56 | zfcp_erp_lun_shutdown_wait(sdev, "scssd_1"); | |
57 | put_device(&zfcp_sdev->port->dev); | |
1da177e4 LT |
58 | } |
59 | ||
f76af7d7 | 60 | static int zfcp_scsi_slave_configure(struct scsi_device *sdp) |
1da177e4 LT |
61 | { |
62 | if (sdp->tagged_supported) | |
a40a1baf | 63 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth); |
1da177e4 LT |
64 | else |
65 | scsi_adjust_queue_depth(sdp, 0, 1); | |
66 | return 0; | |
67 | } | |
68 | ||
f76af7d7 | 69 | static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) |
1da177e4 | 70 | { |
5771710b SS |
71 | struct zfcp_adapter *adapter = |
72 | (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; | |
22ed1307 | 73 | |
feac6a07 | 74 | set_host_byte(scpnt, result); |
ab72528a | 75 | zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt); |
1da177e4 LT |
76 | scpnt->scsi_done(scpnt); |
77 | } | |
78 | ||
f76af7d7 MP |
79 | static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, |
80 | void (*done) (struct scsi_cmnd *)) | |
1da177e4 | 81 | { |
b62a8d9b CS |
82 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
83 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
a2fa0aed | 84 | struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); |
b62a8d9b | 85 | int status, scsi_result, ret; |
1da177e4 LT |
86 | |
87 | /* reset the status for this request */ | |
88 | scpnt->result = 0; | |
89 | scpnt->host_scribble = NULL; | |
90 | scpnt->scsi_done = done; | |
91 | ||
a2fa0aed CS |
92 | scsi_result = fc_remote_port_chkready(rport); |
93 | if (unlikely(scsi_result)) { | |
94 | scpnt->result = scsi_result; | |
ab72528a | 95 | zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt); |
a2fa0aed CS |
96 | scpnt->scsi_done(scpnt); |
97 | return 0; | |
98 | } | |
99 | ||
b62a8d9b | 100 | status = atomic_read(&zfcp_sdev->status); |
8830271c | 101 | if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) && |
b62a8d9b | 102 | !(atomic_read(&zfcp_sdev->port->status) & |
8830271c | 103 | ZFCP_STATUS_COMMON_ERP_FAILED)) { |
b62a8d9b | 104 | /* only LUN access denied, but port is good |
8830271c | 105 | * not covered by FC transport, have to fail here */ |
f76af7d7 | 106 | zfcp_scsi_command_fail(scpnt, DID_ERROR); |
a419aef8 | 107 | return 0; |
f76af7d7 MP |
108 | } |
109 | ||
8830271c CS |
110 | if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { |
111 | /* This could be either | |
b62a8d9b CS |
112 | * open LUN pending: this is temporary, will result in |
113 | * open LUN or ERP_FAILED, so retry command | |
8830271c CS |
114 | * call to rport_delete pending: mimic retry from |
115 | * fc_remote_port_chkready until rport is BLOCKED | |
116 | */ | |
117 | zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY); | |
118 | return 0; | |
119 | } | |
120 | ||
b62a8d9b | 121 | ret = zfcp_fsf_fcp_cmnd(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 | ||
b62a8d9b | 130 | static int zfcp_scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 131 | { |
b62a8d9b CS |
132 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
133 | struct zfcp_adapter *adapter = | |
134 | (struct zfcp_adapter *) sdev->host->hostdata[0]; | |
135 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); | |
1da177e4 | 136 | struct zfcp_port *port; |
f76af7d7 | 137 | struct zfcp_unit *unit; |
f76af7d7 | 138 | |
b62a8d9b CS |
139 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
140 | if (!port) | |
141 | return -ENXIO; | |
f76af7d7 | 142 | |
b62a8d9b CS |
143 | unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev)); |
144 | if (unit) | |
145 | put_device(&unit->dev); | |
146 | else { | |
147 | put_device(&port->dev); | |
148 | return -ENXIO; | |
f76af7d7 | 149 | } |
b62a8d9b CS |
150 | |
151 | zfcp_sdev->port = port; | |
152 | zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF; | |
153 | zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF; | |
154 | zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF; | |
155 | zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF; | |
156 | zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF; | |
157 | zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF; | |
158 | spin_lock_init(&zfcp_sdev->latencies.lock); | |
159 | ||
160 | zfcp_erp_modify_lun_status(sdev, "scsla_0", NULL, | |
161 | ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); | |
162 | zfcp_erp_lun_reopen(sdev, 0, "scsla_1", NULL); | |
163 | zfcp_erp_wait(port->adapter); | |
164 | ||
165 | return 0; | |
1da177e4 LT |
166 | } |
167 | ||
2b67fc46 | 168 | static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 169 | { |
63caf367 CS |
170 | struct Scsi_Host *scsi_host = scpnt->device->host; |
171 | struct zfcp_adapter *adapter = | |
172 | (struct zfcp_adapter *) scsi_host->hostdata[0]; | |
63caf367 | 173 | struct zfcp_fsf_req *old_req, *abrt_req; |
1da177e4 | 174 | unsigned long flags; |
a11a52be | 175 | unsigned long old_reqid = (unsigned long) scpnt->host_scribble; |
a1dbfddd | 176 | int retval = SUCCESS, ret; |
63caf367 | 177 | int retry = 3; |
a11a52be | 178 | char *dbf_tag; |
1da177e4 | 179 | |
059c97d0 | 180 | /* avoid race condition between late normal completion and abort */ |
1da177e4 LT |
181 | write_lock_irqsave(&adapter->abort_lock, flags); |
182 | ||
b6bd2fb9 | 183 | old_req = zfcp_reqlist_find(adapter->req_list, old_reqid); |
63caf367 | 184 | if (!old_req) { |
1da177e4 | 185 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
5771710b SS |
186 | zfcp_dbf_scsi_abort("lte1", adapter->dbf, scpnt, NULL, |
187 | old_reqid); | |
c6936e7f | 188 | return FAILED; /* completion could be in progress */ |
1da177e4 | 189 | } |
63caf367 | 190 | old_req->data = NULL; |
1da177e4 | 191 | |
4eff4a36 | 192 | /* don't access old fsf_req after releasing the abort_lock */ |
1da177e4 | 193 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
4eff4a36 | 194 | |
63caf367 | 195 | while (retry--) { |
b62a8d9b | 196 | abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt); |
63caf367 CS |
197 | if (abrt_req) |
198 | break; | |
199 | ||
200 | zfcp_erp_wait(adapter); | |
a1dbfddd CS |
201 | ret = fc_block_scsi_eh(scpnt); |
202 | if (ret) | |
203 | return ret; | |
63caf367 CS |
204 | if (!(atomic_read(&adapter->status) & |
205 | ZFCP_STATUS_COMMON_RUNNING)) { | |
5771710b SS |
206 | zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL, |
207 | old_reqid); | |
63caf367 CS |
208 | return SUCCESS; |
209 | } | |
1da177e4 | 210 | } |
63caf367 CS |
211 | if (!abrt_req) |
212 | return FAILED; | |
1da177e4 | 213 | |
058b8647 | 214 | wait_for_completion(&abrt_req->completion); |
059c97d0 | 215 | |
63caf367 | 216 | if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) |
a11a52be | 217 | dbf_tag = "okay"; |
63caf367 | 218 | else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) |
a11a52be | 219 | dbf_tag = "lte2"; |
63caf367 | 220 | else { |
a11a52be | 221 | dbf_tag = "fail"; |
1da177e4 | 222 | retval = FAILED; |
1da177e4 | 223 | } |
5771710b | 224 | zfcp_dbf_scsi_abort(dbf_tag, adapter->dbf, scpnt, abrt_req, old_reqid); |
63caf367 | 225 | zfcp_fsf_req_free(abrt_req); |
f76af7d7 | 226 | return retval; |
1da177e4 LT |
227 | } |
228 | ||
63caf367 | 229 | static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) |
1da177e4 | 230 | { |
b62a8d9b CS |
231 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
232 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
564e1c86 | 233 | struct zfcp_fsf_req *fsf_req = NULL; |
a1dbfddd | 234 | int retval = SUCCESS, ret; |
63caf367 CS |
235 | int retry = 3; |
236 | ||
237 | while (retry--) { | |
b62a8d9b | 238 | fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags); |
63caf367 CS |
239 | if (fsf_req) |
240 | break; | |
241 | ||
242 | zfcp_erp_wait(adapter); | |
a1dbfddd CS |
243 | ret = fc_block_scsi_eh(scpnt); |
244 | if (ret) | |
245 | return ret; | |
246 | ||
63caf367 CS |
247 | if (!(atomic_read(&adapter->status) & |
248 | ZFCP_STATUS_COMMON_RUNNING)) { | |
b62a8d9b | 249 | zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags); |
63caf367 CS |
250 | return SUCCESS; |
251 | } | |
1da177e4 | 252 | } |
63caf367 CS |
253 | if (!fsf_req) |
254 | return FAILED; | |
1da177e4 | 255 | |
058b8647 | 256 | wait_for_completion(&fsf_req->completion); |
77eb1699 | 257 | |
8a36e453 | 258 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { |
b62a8d9b | 259 | zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags); |
f76af7d7 | 260 | retval = FAILED; |
8a36e453 | 261 | } else |
b62a8d9b | 262 | zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags); |
77eb1699 AH |
263 | |
264 | zfcp_fsf_req_free(fsf_req); | |
1da177e4 LT |
265 | return retval; |
266 | } | |
267 | ||
f76af7d7 MP |
268 | static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) |
269 | { | |
4318e08c | 270 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); |
f76af7d7 MP |
271 | } |
272 | ||
273 | static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) | |
274 | { | |
4318e08c | 275 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); |
f76af7d7 MP |
276 | } |
277 | ||
2b67fc46 | 278 | static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 279 | { |
b62a8d9b CS |
280 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
281 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
a1dbfddd | 282 | int ret; |
1da177e4 | 283 | |
5ffd51a5 | 284 | zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt); |
81654286 | 285 | zfcp_erp_wait(adapter); |
a1dbfddd CS |
286 | ret = fc_block_scsi_eh(scpnt); |
287 | if (ret) | |
288 | return ret; | |
1da177e4 | 289 | |
810f1e3e | 290 | return SUCCESS; |
1da177e4 LT |
291 | } |
292 | ||
f76af7d7 | 293 | int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) |
1da177e4 | 294 | { |
f76af7d7 | 295 | struct ccw_dev_id dev_id; |
1da177e4 | 296 | |
9f28745a | 297 | if (adapter->scsi_host) |
f76af7d7 | 298 | return 0; |
9f28745a | 299 | |
f76af7d7 | 300 | ccw_device_get_id(adapter->ccw_device, &dev_id); |
1da177e4 LT |
301 | /* register adapter as SCSI host with mid layer of SCSI stack */ |
302 | adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template, | |
303 | sizeof (struct zfcp_adapter *)); | |
304 | if (!adapter->scsi_host) { | |
553448f6 | 305 | dev_err(&adapter->ccw_device->dev, |
ff3b24fa CS |
306 | "Registering the FCP device with the " |
307 | "SCSI stack failed\n"); | |
f76af7d7 | 308 | return -EIO; |
1da177e4 | 309 | } |
1da177e4 LT |
310 | |
311 | /* tell the SCSI stack some characteristics of this adapter */ | |
312 | adapter->scsi_host->max_id = 1; | |
313 | adapter->scsi_host->max_lun = 1; | |
314 | adapter->scsi_host->max_channel = 0; | |
f76af7d7 | 315 | adapter->scsi_host->unique_id = dev_id.devno; |
4318e08c | 316 | adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ |
dd52e0ea | 317 | adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; |
1da177e4 | 318 | |
1da177e4 LT |
319 | adapter->scsi_host->hostdata[0] = (unsigned long) adapter; |
320 | ||
321 | if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { | |
322 | scsi_host_put(adapter->scsi_host); | |
f76af7d7 | 323 | return -EIO; |
1da177e4 | 324 | } |
f76af7d7 MP |
325 | |
326 | return 0; | |
1da177e4 LT |
327 | } |
328 | ||
f76af7d7 | 329 | void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) |
1da177e4 LT |
330 | { |
331 | struct Scsi_Host *shost; | |
13e1e1f0 | 332 | struct zfcp_port *port; |
1da177e4 LT |
333 | |
334 | shost = adapter->scsi_host; | |
335 | if (!shost) | |
336 | return; | |
f76af7d7 | 337 | |
ecf0c772 SS |
338 | read_lock_irq(&adapter->port_list_lock); |
339 | list_for_each_entry(port, &adapter->port_list, list) | |
f3450c7b | 340 | port->rport = NULL; |
ecf0c772 | 341 | read_unlock_irq(&adapter->port_list_lock); |
f76af7d7 | 342 | |
3859f6a2 | 343 | fc_remove_host(shost); |
1da177e4 LT |
344 | scsi_remove_host(shost); |
345 | scsi_host_put(shost); | |
346 | adapter->scsi_host = NULL; | |
1da177e4 LT |
347 | |
348 | return; | |
349 | } | |
350 | ||
f6cd94b1 AH |
351 | static struct fc_host_statistics* |
352 | zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) | |
1da177e4 | 353 | { |
f6cd94b1 | 354 | struct fc_host_statistics *fc_stats; |
1da177e4 | 355 | |
f6cd94b1 AH |
356 | if (!adapter->fc_stats) { |
357 | fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); | |
358 | if (!fc_stats) | |
359 | return NULL; | |
f3450c7b | 360 | adapter->fc_stats = fc_stats; /* freed in adapter_release */ |
f6cd94b1 AH |
361 | } |
362 | memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); | |
363 | return adapter->fc_stats; | |
1da177e4 LT |
364 | } |
365 | ||
f76af7d7 MP |
366 | static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, |
367 | struct fsf_qtcb_bottom_port *data, | |
368 | struct fsf_qtcb_bottom_port *old) | |
1da177e4 | 369 | { |
f76af7d7 MP |
370 | fc_stats->seconds_since_last_reset = |
371 | data->seconds_since_last_reset - old->seconds_since_last_reset; | |
f6cd94b1 AH |
372 | fc_stats->tx_frames = data->tx_frames - old->tx_frames; |
373 | fc_stats->tx_words = data->tx_words - old->tx_words; | |
374 | fc_stats->rx_frames = data->rx_frames - old->rx_frames; | |
375 | fc_stats->rx_words = data->rx_words - old->rx_words; | |
376 | fc_stats->lip_count = data->lip - old->lip; | |
377 | fc_stats->nos_count = data->nos - old->nos; | |
378 | fc_stats->error_frames = data->error_frames - old->error_frames; | |
379 | fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; | |
380 | fc_stats->link_failure_count = data->link_failure - old->link_failure; | |
381 | fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; | |
f76af7d7 MP |
382 | fc_stats->loss_of_signal_count = |
383 | data->loss_of_signal - old->loss_of_signal; | |
384 | fc_stats->prim_seq_protocol_err_count = | |
385 | data->psp_error_counts - old->psp_error_counts; | |
386 | fc_stats->invalid_tx_word_count = | |
387 | data->invalid_tx_words - old->invalid_tx_words; | |
f6cd94b1 | 388 | fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; |
f76af7d7 MP |
389 | fc_stats->fcp_input_requests = |
390 | data->input_requests - old->input_requests; | |
391 | fc_stats->fcp_output_requests = | |
392 | data->output_requests - old->output_requests; | |
393 | fc_stats->fcp_control_requests = | |
394 | data->control_requests - old->control_requests; | |
f6cd94b1 AH |
395 | fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; |
396 | fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; | |
397 | } | |
1da177e4 | 398 | |
f76af7d7 MP |
399 | static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, |
400 | struct fsf_qtcb_bottom_port *data) | |
f6cd94b1 AH |
401 | { |
402 | fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; | |
403 | fc_stats->tx_frames = data->tx_frames; | |
404 | fc_stats->tx_words = data->tx_words; | |
405 | fc_stats->rx_frames = data->rx_frames; | |
406 | fc_stats->rx_words = data->rx_words; | |
407 | fc_stats->lip_count = data->lip; | |
408 | fc_stats->nos_count = data->nos; | |
409 | fc_stats->error_frames = data->error_frames; | |
410 | fc_stats->dumped_frames = data->dumped_frames; | |
411 | fc_stats->link_failure_count = data->link_failure; | |
412 | fc_stats->loss_of_sync_count = data->loss_of_sync; | |
413 | fc_stats->loss_of_signal_count = data->loss_of_signal; | |
414 | fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; | |
415 | fc_stats->invalid_tx_word_count = data->invalid_tx_words; | |
416 | fc_stats->invalid_crc_count = data->invalid_crcs; | |
417 | fc_stats->fcp_input_requests = data->input_requests; | |
418 | fc_stats->fcp_output_requests = data->output_requests; | |
419 | fc_stats->fcp_control_requests = data->control_requests; | |
420 | fc_stats->fcp_input_megabytes = data->input_mb; | |
421 | fc_stats->fcp_output_megabytes = data->output_mb; | |
422 | } | |
423 | ||
f76af7d7 | 424 | static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) |
f6cd94b1 AH |
425 | { |
426 | struct zfcp_adapter *adapter; | |
427 | struct fc_host_statistics *fc_stats; | |
428 | struct fsf_qtcb_bottom_port *data; | |
429 | int ret; | |
430 | ||
f76af7d7 | 431 | adapter = (struct zfcp_adapter *)host->hostdata[0]; |
f6cd94b1 AH |
432 | fc_stats = zfcp_init_fc_host_stats(adapter); |
433 | if (!fc_stats) | |
434 | return NULL; | |
435 | ||
ec4081c6 | 436 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
437 | if (!data) |
438 | return NULL; | |
f6cd94b1 | 439 | |
564e1c86 | 440 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f6cd94b1 AH |
441 | if (ret) { |
442 | kfree(data); | |
f76af7d7 | 443 | return NULL; |
f6cd94b1 AH |
444 | } |
445 | ||
446 | if (adapter->stats_reset && | |
447 | ((jiffies/HZ - adapter->stats_reset) < | |
f76af7d7 | 448 | data->seconds_since_last_reset)) |
f6cd94b1 AH |
449 | zfcp_adjust_fc_host_stats(fc_stats, data, |
450 | adapter->stats_reset_data); | |
f76af7d7 | 451 | else |
f6cd94b1 AH |
452 | zfcp_set_fc_host_stats(fc_stats, data); |
453 | ||
454 | kfree(data); | |
455 | return fc_stats; | |
1da177e4 LT |
456 | } |
457 | ||
f76af7d7 | 458 | static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) |
1da177e4 | 459 | { |
f6cd94b1 | 460 | struct zfcp_adapter *adapter; |
f76af7d7 | 461 | struct fsf_qtcb_bottom_port *data; |
f6cd94b1 | 462 | int ret; |
1da177e4 | 463 | |
f6cd94b1 | 464 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; |
ec4081c6 | 465 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
466 | if (!data) |
467 | return; | |
f6cd94b1 | 468 | |
564e1c86 | 469 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f76af7d7 | 470 | if (ret) |
83f6d6d7 | 471 | kfree(data); |
f76af7d7 | 472 | else { |
f6cd94b1 | 473 | adapter->stats_reset = jiffies/HZ; |
f76af7d7 | 474 | kfree(adapter->stats_reset_data); |
f6cd94b1 | 475 | adapter->stats_reset_data = data; /* finally freed in |
f3450c7b | 476 | adapter_release */ |
f6cd94b1 | 477 | } |
1da177e4 LT |
478 | } |
479 | ||
85a82392 SS |
480 | static void zfcp_get_host_port_state(struct Scsi_Host *shost) |
481 | { | |
482 | struct zfcp_adapter *adapter = | |
483 | (struct zfcp_adapter *)shost->hostdata[0]; | |
484 | int status = atomic_read(&adapter->status); | |
485 | ||
486 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && | |
487 | !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) | |
488 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
489 | else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) | |
490 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
491 | else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
492 | fc_host_port_state(shost) = FC_PORTSTATE_ERROR; | |
493 | else | |
494 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
495 | } | |
496 | ||
338151e0 AH |
497 | static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
498 | { | |
499 | rport->dev_loss_tmo = timeout; | |
500 | } | |
501 | ||
a2fa0aed CS |
502 | /** |
503 | * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport | |
504 | * @rport: The FC rport where to teminate I/O | |
505 | * | |
506 | * Abort all pending SCSI commands for a port by closing the | |
835dc298 CS |
507 | * port. Using a reopen avoids a conflict with a shutdown |
508 | * overwriting a reopen. The "forced" ensures that a disappeared port | |
509 | * is not opened again as valid due to the cached plogi data in | |
510 | * non-NPIV mode. | |
a2fa0aed CS |
511 | */ |
512 | static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) | |
513 | { | |
70932935 | 514 | struct zfcp_port *port; |
ea945ff8 SS |
515 | struct Scsi_Host *shost = rport_to_shost(rport); |
516 | struct zfcp_adapter *adapter = | |
517 | (struct zfcp_adapter *)shost->hostdata[0]; | |
70932935 | 518 | |
ea945ff8 | 519 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
a2fa0aed | 520 | |
70932935 | 521 | if (port) { |
835dc298 | 522 | zfcp_erp_port_forced_reopen(port, 0, "sctrpi1", NULL); |
615f59e0 | 523 | put_device(&port->dev); |
70932935 | 524 | } |
a2fa0aed CS |
525 | } |
526 | ||
527 | static void zfcp_scsi_rport_register(struct zfcp_port *port) | |
528 | { | |
529 | struct fc_rport_identifiers ids; | |
530 | struct fc_rport *rport; | |
531 | ||
379d6bf6 CS |
532 | if (port->rport) |
533 | return; | |
534 | ||
a2fa0aed CS |
535 | ids.node_name = port->wwnn; |
536 | ids.port_name = port->wwpn; | |
537 | ids.port_id = port->d_id; | |
538 | ids.roles = FC_RPORT_ROLE_FCP_TARGET; | |
539 | ||
540 | rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); | |
541 | if (!rport) { | |
542 | dev_err(&port->adapter->ccw_device->dev, | |
543 | "Registering port 0x%016Lx failed\n", | |
544 | (unsigned long long)port->wwpn); | |
545 | return; | |
546 | } | |
547 | ||
a2fa0aed CS |
548 | rport->maxframe_size = port->maxframe_size; |
549 | rport->supported_classes = port->supported_classes; | |
550 | port->rport = rport; | |
1bf3ff02 | 551 | port->starget_id = rport->scsi_target_id; |
5a7de559 | 552 | |
1daa4eb5 | 553 | zfcp_unit_queue_scsi_scan(port); |
a2fa0aed CS |
554 | } |
555 | ||
556 | static void zfcp_scsi_rport_block(struct zfcp_port *port) | |
557 | { | |
70932935 CS |
558 | struct fc_rport *rport = port->rport; |
559 | ||
379d6bf6 | 560 | if (rport) { |
70932935 | 561 | fc_remote_port_delete(rport); |
379d6bf6 CS |
562 | port->rport = NULL; |
563 | } | |
a2fa0aed CS |
564 | } |
565 | ||
566 | void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) | |
567 | { | |
615f59e0 | 568 | get_device(&port->dev); |
a2fa0aed CS |
569 | port->rport_task = RPORT_ADD; |
570 | ||
4544683a | 571 | if (!queue_work(port->adapter->work_queue, &port->rport_work)) |
615f59e0 | 572 | put_device(&port->dev); |
a2fa0aed CS |
573 | } |
574 | ||
575 | void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) | |
576 | { | |
615f59e0 | 577 | get_device(&port->dev); |
a2fa0aed CS |
578 | port->rport_task = RPORT_DEL; |
579 | ||
4544683a SS |
580 | if (port->rport && queue_work(port->adapter->work_queue, |
581 | &port->rport_work)) | |
a67417ab SS |
582 | return; |
583 | ||
615f59e0 | 584 | put_device(&port->dev); |
a2fa0aed CS |
585 | } |
586 | ||
587 | void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) | |
588 | { | |
ecf0c772 | 589 | unsigned long flags; |
a2fa0aed CS |
590 | struct zfcp_port *port; |
591 | ||
ecf0c772 SS |
592 | read_lock_irqsave(&adapter->port_list_lock, flags); |
593 | list_for_each_entry(port, &adapter->port_list, list) | |
a2fa0aed | 594 | zfcp_scsi_schedule_rport_block(port); |
ecf0c772 | 595 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
a2fa0aed CS |
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 | ||
615f59e0 | 613 | put_device(&port->dev); |
a2fa0aed CS |
614 | } |
615 | ||
ef3eb71d FB |
616 | /** |
617 | * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host | |
618 | * @adapter: The adapter where to configure DIF/DIX for the SCSI host | |
619 | */ | |
620 | void zfcp_scsi_set_prot(struct zfcp_adapter *adapter) | |
621 | { | |
622 | unsigned int mask = 0; | |
623 | unsigned int data_div; | |
624 | struct Scsi_Host *shost = adapter->scsi_host; | |
625 | ||
626 | data_div = atomic_read(&adapter->status) & | |
627 | ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED; | |
628 | ||
629 | if (enable_dif && | |
630 | adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1) | |
631 | mask |= SHOST_DIF_TYPE1_PROTECTION; | |
632 | ||
633 | if (enable_dif && data_div && | |
634 | adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) { | |
635 | mask |= SHOST_DIX_TYPE1_PROTECTION; | |
636 | scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP); | |
637 | shost->sg_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ / 2; | |
638 | shost->max_sectors = ZFCP_QDIO_MAX_SBALES_PER_REQ * 8 / 2; | |
639 | } | |
640 | ||
641 | scsi_host_set_prot(shost, mask); | |
642 | } | |
643 | ||
644 | /** | |
645 | * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error | |
646 | * @scmd: The SCSI command to report the error for | |
647 | * @ascq: The ASCQ to put in the sense buffer | |
648 | * | |
649 | * See the error handling in sd_done for the sense codes used here. | |
650 | * Set DID_SOFT_ERROR to retry the request, if possible. | |
651 | */ | |
652 | void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq) | |
653 | { | |
654 | scsi_build_sense_buffer(1, scmd->sense_buffer, | |
655 | ILLEGAL_REQUEST, 0x10, ascq); | |
656 | set_driver_byte(scmd, DRIVER_SENSE); | |
657 | scmd->result |= SAM_STAT_CHECK_CONDITION; | |
658 | set_host_byte(scmd, DID_SOFT_ERROR); | |
659 | } | |
660 | ||
1da177e4 | 661 | struct fc_function_template zfcp_transport_functions = { |
1da177e4 LT |
662 | .show_starget_port_id = 1, |
663 | .show_starget_port_name = 1, | |
664 | .show_starget_node_name = 1, | |
3859f6a2 | 665 | .show_rport_supported_classes = 1, |
75bfc283 | 666 | .show_rport_maxframe_size = 1, |
338151e0 | 667 | .show_rport_dev_loss_tmo = 1, |
3859f6a2 AH |
668 | .show_host_node_name = 1, |
669 | .show_host_port_name = 1, | |
ad757cdf | 670 | .show_host_permanent_port_name = 1, |
3859f6a2 | 671 | .show_host_supported_classes = 1, |
0fdd2133 | 672 | .show_host_supported_fc4s = 1, |
ad757cdf | 673 | .show_host_supported_speeds = 1, |
13e1e1f0 | 674 | .show_host_maxframe_size = 1, |
3859f6a2 | 675 | .show_host_serial_number = 1, |
f6cd94b1 AH |
676 | .get_fc_host_stats = zfcp_get_fc_host_stats, |
677 | .reset_fc_host_stats = zfcp_reset_fc_host_stats, | |
338151e0 | 678 | .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, |
85a82392 | 679 | .get_host_port_state = zfcp_get_host_port_state, |
a2fa0aed | 680 | .terminate_rport_io = zfcp_scsi_terminate_rport_io, |
85a82392 | 681 | .show_host_port_state = 1, |
0fdd2133 | 682 | .show_host_active_fc4s = 1, |
7c7dc196 | 683 | .bsg_request = zfcp_fc_exec_bsg_job, |
491ca442 | 684 | .bsg_timeout = zfcp_fc_timeout_bsg_job, |
f6cd94b1 AH |
685 | /* no functions registered for following dynamic attributes but |
686 | directly set by LLDD */ | |
ad757cdf | 687 | .show_host_port_type = 1, |
13e1e1f0 AH |
688 | .show_host_speed = 1, |
689 | .show_host_port_id = 1, | |
52ef11a7 | 690 | .disable_target_scan = 1, |
7c7dc196 | 691 | .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), |
1da177e4 LT |
692 | }; |
693 | ||
f76af7d7 MP |
694 | struct zfcp_data zfcp_data = { |
695 | .scsi_host_template = { | |
696 | .name = "zfcp", | |
697 | .module = THIS_MODULE, | |
698 | .proc_name = "zfcp", | |
a40a1baf | 699 | .change_queue_depth = zfcp_scsi_change_queue_depth, |
f76af7d7 MP |
700 | .slave_alloc = zfcp_scsi_slave_alloc, |
701 | .slave_configure = zfcp_scsi_slave_configure, | |
702 | .slave_destroy = zfcp_scsi_slave_destroy, | |
703 | .queuecommand = zfcp_scsi_queuecommand, | |
704 | .eh_abort_handler = zfcp_scsi_eh_abort_handler, | |
705 | .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, | |
706 | .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, | |
707 | .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, | |
708 | .can_queue = 4096, | |
709 | .this_id = -1, | |
01b04759 | 710 | .sg_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ, |
f76af7d7 MP |
711 | .cmd_per_lun = 1, |
712 | .use_clustering = 1, | |
713 | .sdev_attrs = zfcp_sysfs_sdev_attrs, | |
01b04759 | 714 | .max_sectors = (ZFCP_QDIO_MAX_SBALES_PER_REQ * 8), |
68322984 | 715 | .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, |
60221920 | 716 | .shost_attrs = zfcp_sysfs_shost_attrs, |
f76af7d7 MP |
717 | }, |
718 | }; |