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 | { |
feac6a07 | 71 | set_host_byte(scpnt, result); |
250a1352 | 72 | zfcp_dbf_scsi_fail_send(scpnt); |
1da177e4 LT |
73 | scpnt->scsi_done(scpnt); |
74 | } | |
75 | ||
e55f8753 CS |
76 | static |
77 | int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt) | |
1da177e4 | 78 | { |
b62a8d9b | 79 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
a2fa0aed | 80 | struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); |
b62a8d9b | 81 | int status, scsi_result, ret; |
1da177e4 LT |
82 | |
83 | /* reset the status for this request */ | |
84 | scpnt->result = 0; | |
85 | scpnt->host_scribble = NULL; | |
1da177e4 | 86 | |
a2fa0aed CS |
87 | scsi_result = fc_remote_port_chkready(rport); |
88 | if (unlikely(scsi_result)) { | |
89 | scpnt->result = scsi_result; | |
250a1352 | 90 | zfcp_dbf_scsi_fail_send(scpnt); |
a2fa0aed CS |
91 | scpnt->scsi_done(scpnt); |
92 | return 0; | |
93 | } | |
94 | ||
b62a8d9b | 95 | status = atomic_read(&zfcp_sdev->status); |
8830271c | 96 | if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) && |
b62a8d9b | 97 | !(atomic_read(&zfcp_sdev->port->status) & |
8830271c | 98 | ZFCP_STATUS_COMMON_ERP_FAILED)) { |
b62a8d9b | 99 | /* only LUN access denied, but port is good |
8830271c | 100 | * not covered by FC transport, have to fail here */ |
f76af7d7 | 101 | zfcp_scsi_command_fail(scpnt, DID_ERROR); |
a419aef8 | 102 | return 0; |
f76af7d7 MP |
103 | } |
104 | ||
8830271c CS |
105 | if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { |
106 | /* This could be either | |
b62a8d9b CS |
107 | * open LUN pending: this is temporary, will result in |
108 | * open LUN or ERP_FAILED, so retry command | |
8830271c CS |
109 | * call to rport_delete pending: mimic retry from |
110 | * fc_remote_port_chkready until rport is BLOCKED | |
111 | */ | |
112 | zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY); | |
113 | return 0; | |
114 | } | |
115 | ||
b62a8d9b | 116 | ret = zfcp_fsf_fcp_cmnd(scpnt); |
f76af7d7 | 117 | if (unlikely(ret == -EBUSY)) |
f7a65e92 | 118 | return SCSI_MLQUEUE_DEVICE_BUSY; |
f76af7d7 MP |
119 | else if (unlikely(ret < 0)) |
120 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 121 | |
f76af7d7 | 122 | return ret; |
1da177e4 LT |
123 | } |
124 | ||
b62a8d9b | 125 | static int zfcp_scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 126 | { |
b62a8d9b CS |
127 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
128 | struct zfcp_adapter *adapter = | |
129 | (struct zfcp_adapter *) sdev->host->hostdata[0]; | |
130 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); | |
1da177e4 | 131 | struct zfcp_port *port; |
f76af7d7 | 132 | struct zfcp_unit *unit; |
1da177e4 | 133 | |
b62a8d9b CS |
134 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
135 | if (!port) | |
136 | return -ENXIO; | |
f76af7d7 | 137 | |
b62a8d9b CS |
138 | unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev)); |
139 | if (unit) | |
140 | put_device(&unit->dev); | |
f76af7d7 | 141 | |
f8210e34 | 142 | if (!unit && !(adapter->connection_features & FSF_FEATURE_NPIV_MODE)) { |
b62a8d9b CS |
143 | put_device(&port->dev); |
144 | return -ENXIO; | |
f76af7d7 | 145 | } |
f76af7d7 | 146 | |
b62a8d9b CS |
147 | zfcp_sdev->port = port; |
148 | zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF; | |
149 | zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF; | |
150 | zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF; | |
151 | zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF; | |
152 | zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF; | |
153 | zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF; | |
154 | spin_lock_init(&zfcp_sdev->latencies.lock); | |
f76af7d7 | 155 | |
edaed859 | 156 | zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING); |
ea4a3a6a | 157 | zfcp_erp_lun_reopen(sdev, 0, "scsla_1"); |
b62a8d9b CS |
158 | zfcp_erp_wait(port->adapter); |
159 | ||
160 | return 0; | |
1da177e4 LT |
161 | } |
162 | ||
2b67fc46 | 163 | static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 164 | { |
63caf367 CS |
165 | struct Scsi_Host *scsi_host = scpnt->device->host; |
166 | struct zfcp_adapter *adapter = | |
167 | (struct zfcp_adapter *) scsi_host->hostdata[0]; | |
63caf367 | 168 | struct zfcp_fsf_req *old_req, *abrt_req; |
1da177e4 | 169 | unsigned long flags; |
a11a52be | 170 | unsigned long old_reqid = (unsigned long) scpnt->host_scribble; |
a1dbfddd | 171 | int retval = SUCCESS, ret; |
63caf367 | 172 | int retry = 3; |
a11a52be | 173 | char *dbf_tag; |
1da177e4 | 174 | |
059c97d0 | 175 | /* avoid race condition between late normal completion and abort */ |
1da177e4 LT |
176 | write_lock_irqsave(&adapter->abort_lock, flags); |
177 | ||
b6bd2fb9 | 178 | old_req = zfcp_reqlist_find(adapter->req_list, old_reqid); |
63caf367 | 179 | if (!old_req) { |
1da177e4 | 180 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
250a1352 | 181 | zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL); |
c6936e7f | 182 | return FAILED; /* completion could be in progress */ |
1da177e4 | 183 | } |
63caf367 | 184 | old_req->data = NULL; |
1da177e4 | 185 | |
4eff4a36 | 186 | /* don't access old fsf_req after releasing the abort_lock */ |
1da177e4 | 187 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
4eff4a36 | 188 | |
63caf367 | 189 | while (retry--) { |
b62a8d9b | 190 | abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt); |
63caf367 CS |
191 | if (abrt_req) |
192 | break; | |
193 | ||
194 | zfcp_erp_wait(adapter); | |
a1dbfddd | 195 | ret = fc_block_scsi_eh(scpnt); |
250a1352 SS |
196 | if (ret) { |
197 | zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL); | |
a1dbfddd | 198 | return ret; |
250a1352 | 199 | } |
63caf367 CS |
200 | if (!(atomic_read(&adapter->status) & |
201 | ZFCP_STATUS_COMMON_RUNNING)) { | |
250a1352 | 202 | zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL); |
63caf367 CS |
203 | return SUCCESS; |
204 | } | |
1da177e4 | 205 | } |
250a1352 SS |
206 | if (!abrt_req) { |
207 | zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL); | |
63caf367 | 208 | return FAILED; |
250a1352 | 209 | } |
1da177e4 | 210 | |
058b8647 | 211 | wait_for_completion(&abrt_req->completion); |
059c97d0 | 212 | |
63caf367 | 213 | if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) |
250a1352 | 214 | dbf_tag = "abrt_ok"; |
63caf367 | 215 | else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) |
250a1352 | 216 | dbf_tag = "abrt_nn"; |
63caf367 | 217 | else { |
250a1352 | 218 | dbf_tag = "abrt_fa"; |
1da177e4 | 219 | retval = FAILED; |
1da177e4 | 220 | } |
250a1352 | 221 | zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req); |
63caf367 | 222 | zfcp_fsf_req_free(abrt_req); |
f76af7d7 | 223 | return retval; |
1da177e4 LT |
224 | } |
225 | ||
63caf367 | 226 | static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) |
1da177e4 | 227 | { |
b62a8d9b CS |
228 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
229 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
564e1c86 | 230 | struct zfcp_fsf_req *fsf_req = NULL; |
a1dbfddd | 231 | int retval = SUCCESS, ret; |
63caf367 CS |
232 | int retry = 3; |
233 | ||
234 | while (retry--) { | |
b62a8d9b | 235 | fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags); |
63caf367 CS |
236 | if (fsf_req) |
237 | break; | |
238 | ||
239 | zfcp_erp_wait(adapter); | |
a1dbfddd CS |
240 | ret = fc_block_scsi_eh(scpnt); |
241 | if (ret) | |
242 | return ret; | |
243 | ||
63caf367 CS |
244 | if (!(atomic_read(&adapter->status) & |
245 | ZFCP_STATUS_COMMON_RUNNING)) { | |
b62a8d9b | 246 | zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags); |
63caf367 CS |
247 | return SUCCESS; |
248 | } | |
1da177e4 | 249 | } |
63caf367 CS |
250 | if (!fsf_req) |
251 | return FAILED; | |
1da177e4 | 252 | |
058b8647 | 253 | wait_for_completion(&fsf_req->completion); |
77eb1699 | 254 | |
8a36e453 | 255 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { |
b62a8d9b | 256 | zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags); |
f76af7d7 | 257 | retval = FAILED; |
8a36e453 | 258 | } else |
b62a8d9b | 259 | zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags); |
77eb1699 AH |
260 | |
261 | zfcp_fsf_req_free(fsf_req); | |
1da177e4 LT |
262 | return retval; |
263 | } | |
264 | ||
f76af7d7 MP |
265 | static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) |
266 | { | |
4318e08c | 267 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); |
f76af7d7 MP |
268 | } |
269 | ||
270 | static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) | |
271 | { | |
4318e08c | 272 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); |
f76af7d7 MP |
273 | } |
274 | ||
2b67fc46 | 275 | static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 276 | { |
b62a8d9b CS |
277 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
278 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
a1dbfddd | 279 | int ret; |
1da177e4 | 280 | |
ea4a3a6a | 281 | zfcp_erp_adapter_reopen(adapter, 0, "schrh_1"); |
81654286 | 282 | zfcp_erp_wait(adapter); |
a1dbfddd CS |
283 | ret = fc_block_scsi_eh(scpnt); |
284 | if (ret) | |
285 | return ret; | |
1da177e4 | 286 | |
810f1e3e | 287 | return SUCCESS; |
1da177e4 LT |
288 | } |
289 | ||
f76af7d7 | 290 | int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) |
1da177e4 | 291 | { |
f76af7d7 | 292 | struct ccw_dev_id dev_id; |
1da177e4 | 293 | |
9f28745a | 294 | if (adapter->scsi_host) |
f76af7d7 | 295 | return 0; |
9f28745a | 296 | |
f76af7d7 | 297 | ccw_device_get_id(adapter->ccw_device, &dev_id); |
1da177e4 LT |
298 | /* register adapter as SCSI host with mid layer of SCSI stack */ |
299 | adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template, | |
300 | sizeof (struct zfcp_adapter *)); | |
301 | if (!adapter->scsi_host) { | |
553448f6 | 302 | dev_err(&adapter->ccw_device->dev, |
ff3b24fa CS |
303 | "Registering the FCP device with the " |
304 | "SCSI stack failed\n"); | |
f76af7d7 | 305 | return -EIO; |
1da177e4 | 306 | } |
1da177e4 LT |
307 | |
308 | /* tell the SCSI stack some characteristics of this adapter */ | |
f8210e34 CS |
309 | adapter->scsi_host->max_id = 511; |
310 | adapter->scsi_host->max_lun = 0xFFFFFFFF; | |
1da177e4 | 311 | adapter->scsi_host->max_channel = 0; |
f76af7d7 | 312 | adapter->scsi_host->unique_id = dev_id.devno; |
4318e08c | 313 | adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ |
dd52e0ea | 314 | adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; |
1da177e4 | 315 | |
1da177e4 LT |
316 | adapter->scsi_host->hostdata[0] = (unsigned long) adapter; |
317 | ||
318 | if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { | |
319 | scsi_host_put(adapter->scsi_host); | |
f76af7d7 | 320 | return -EIO; |
1da177e4 | 321 | } |
f76af7d7 MP |
322 | |
323 | return 0; | |
1da177e4 LT |
324 | } |
325 | ||
f76af7d7 | 326 | void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) |
1da177e4 LT |
327 | { |
328 | struct Scsi_Host *shost; | |
13e1e1f0 | 329 | struct zfcp_port *port; |
1da177e4 LT |
330 | |
331 | shost = adapter->scsi_host; | |
332 | if (!shost) | |
333 | return; | |
f76af7d7 | 334 | |
ecf0c772 SS |
335 | read_lock_irq(&adapter->port_list_lock); |
336 | list_for_each_entry(port, &adapter->port_list, list) | |
f3450c7b | 337 | port->rport = NULL; |
ecf0c772 | 338 | read_unlock_irq(&adapter->port_list_lock); |
f76af7d7 | 339 | |
3859f6a2 | 340 | fc_remove_host(shost); |
1da177e4 LT |
341 | scsi_remove_host(shost); |
342 | scsi_host_put(shost); | |
343 | adapter->scsi_host = NULL; | |
1da177e4 LT |
344 | |
345 | return; | |
346 | } | |
347 | ||
f6cd94b1 AH |
348 | static struct fc_host_statistics* |
349 | zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) | |
1da177e4 | 350 | { |
f6cd94b1 | 351 | struct fc_host_statistics *fc_stats; |
1da177e4 | 352 | |
f6cd94b1 AH |
353 | if (!adapter->fc_stats) { |
354 | fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); | |
355 | if (!fc_stats) | |
356 | return NULL; | |
f3450c7b | 357 | adapter->fc_stats = fc_stats; /* freed in adapter_release */ |
f6cd94b1 AH |
358 | } |
359 | memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); | |
360 | return adapter->fc_stats; | |
1da177e4 LT |
361 | } |
362 | ||
f76af7d7 MP |
363 | static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, |
364 | struct fsf_qtcb_bottom_port *data, | |
365 | struct fsf_qtcb_bottom_port *old) | |
1da177e4 | 366 | { |
f76af7d7 MP |
367 | fc_stats->seconds_since_last_reset = |
368 | data->seconds_since_last_reset - old->seconds_since_last_reset; | |
f6cd94b1 AH |
369 | fc_stats->tx_frames = data->tx_frames - old->tx_frames; |
370 | fc_stats->tx_words = data->tx_words - old->tx_words; | |
371 | fc_stats->rx_frames = data->rx_frames - old->rx_frames; | |
372 | fc_stats->rx_words = data->rx_words - old->rx_words; | |
373 | fc_stats->lip_count = data->lip - old->lip; | |
374 | fc_stats->nos_count = data->nos - old->nos; | |
375 | fc_stats->error_frames = data->error_frames - old->error_frames; | |
376 | fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; | |
377 | fc_stats->link_failure_count = data->link_failure - old->link_failure; | |
378 | fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; | |
f76af7d7 MP |
379 | fc_stats->loss_of_signal_count = |
380 | data->loss_of_signal - old->loss_of_signal; | |
381 | fc_stats->prim_seq_protocol_err_count = | |
382 | data->psp_error_counts - old->psp_error_counts; | |
383 | fc_stats->invalid_tx_word_count = | |
384 | data->invalid_tx_words - old->invalid_tx_words; | |
f6cd94b1 | 385 | fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; |
f76af7d7 MP |
386 | fc_stats->fcp_input_requests = |
387 | data->input_requests - old->input_requests; | |
388 | fc_stats->fcp_output_requests = | |
389 | data->output_requests - old->output_requests; | |
390 | fc_stats->fcp_control_requests = | |
391 | data->control_requests - old->control_requests; | |
f6cd94b1 AH |
392 | fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; |
393 | fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; | |
394 | } | |
1da177e4 | 395 | |
f76af7d7 MP |
396 | static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, |
397 | struct fsf_qtcb_bottom_port *data) | |
f6cd94b1 AH |
398 | { |
399 | fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; | |
400 | fc_stats->tx_frames = data->tx_frames; | |
401 | fc_stats->tx_words = data->tx_words; | |
402 | fc_stats->rx_frames = data->rx_frames; | |
403 | fc_stats->rx_words = data->rx_words; | |
404 | fc_stats->lip_count = data->lip; | |
405 | fc_stats->nos_count = data->nos; | |
406 | fc_stats->error_frames = data->error_frames; | |
407 | fc_stats->dumped_frames = data->dumped_frames; | |
408 | fc_stats->link_failure_count = data->link_failure; | |
409 | fc_stats->loss_of_sync_count = data->loss_of_sync; | |
410 | fc_stats->loss_of_signal_count = data->loss_of_signal; | |
411 | fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; | |
412 | fc_stats->invalid_tx_word_count = data->invalid_tx_words; | |
413 | fc_stats->invalid_crc_count = data->invalid_crcs; | |
414 | fc_stats->fcp_input_requests = data->input_requests; | |
415 | fc_stats->fcp_output_requests = data->output_requests; | |
416 | fc_stats->fcp_control_requests = data->control_requests; | |
417 | fc_stats->fcp_input_megabytes = data->input_mb; | |
418 | fc_stats->fcp_output_megabytes = data->output_mb; | |
419 | } | |
420 | ||
f76af7d7 | 421 | static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) |
f6cd94b1 AH |
422 | { |
423 | struct zfcp_adapter *adapter; | |
424 | struct fc_host_statistics *fc_stats; | |
425 | struct fsf_qtcb_bottom_port *data; | |
426 | int ret; | |
427 | ||
f76af7d7 | 428 | adapter = (struct zfcp_adapter *)host->hostdata[0]; |
f6cd94b1 AH |
429 | fc_stats = zfcp_init_fc_host_stats(adapter); |
430 | if (!fc_stats) | |
431 | return NULL; | |
432 | ||
ec4081c6 | 433 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
434 | if (!data) |
435 | return NULL; | |
f6cd94b1 | 436 | |
564e1c86 | 437 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f6cd94b1 AH |
438 | if (ret) { |
439 | kfree(data); | |
f76af7d7 | 440 | return NULL; |
f6cd94b1 AH |
441 | } |
442 | ||
443 | if (adapter->stats_reset && | |
444 | ((jiffies/HZ - adapter->stats_reset) < | |
f76af7d7 | 445 | data->seconds_since_last_reset)) |
f6cd94b1 AH |
446 | zfcp_adjust_fc_host_stats(fc_stats, data, |
447 | adapter->stats_reset_data); | |
f76af7d7 | 448 | else |
f6cd94b1 AH |
449 | zfcp_set_fc_host_stats(fc_stats, data); |
450 | ||
451 | kfree(data); | |
452 | return fc_stats; | |
1da177e4 LT |
453 | } |
454 | ||
f76af7d7 | 455 | static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) |
1da177e4 | 456 | { |
f6cd94b1 | 457 | struct zfcp_adapter *adapter; |
f76af7d7 | 458 | struct fsf_qtcb_bottom_port *data; |
f6cd94b1 | 459 | int ret; |
1da177e4 | 460 | |
f6cd94b1 | 461 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; |
ec4081c6 | 462 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
463 | if (!data) |
464 | return; | |
f6cd94b1 | 465 | |
564e1c86 | 466 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f76af7d7 | 467 | if (ret) |
83f6d6d7 | 468 | kfree(data); |
f76af7d7 | 469 | else { |
f6cd94b1 | 470 | adapter->stats_reset = jiffies/HZ; |
f76af7d7 | 471 | kfree(adapter->stats_reset_data); |
f6cd94b1 | 472 | adapter->stats_reset_data = data; /* finally freed in |
f3450c7b | 473 | adapter_release */ |
f6cd94b1 | 474 | } |
1da177e4 LT |
475 | } |
476 | ||
85a82392 SS |
477 | static void zfcp_get_host_port_state(struct Scsi_Host *shost) |
478 | { | |
479 | struct zfcp_adapter *adapter = | |
480 | (struct zfcp_adapter *)shost->hostdata[0]; | |
481 | int status = atomic_read(&adapter->status); | |
482 | ||
483 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && | |
484 | !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) | |
485 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
486 | else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) | |
487 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
488 | else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
489 | fc_host_port_state(shost) = FC_PORTSTATE_ERROR; | |
490 | else | |
491 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
492 | } | |
493 | ||
338151e0 AH |
494 | static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
495 | { | |
496 | rport->dev_loss_tmo = timeout; | |
497 | } | |
498 | ||
a2fa0aed CS |
499 | /** |
500 | * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport | |
501 | * @rport: The FC rport where to teminate I/O | |
502 | * | |
503 | * Abort all pending SCSI commands for a port by closing the | |
835dc298 CS |
504 | * port. Using a reopen avoids a conflict with a shutdown |
505 | * overwriting a reopen. The "forced" ensures that a disappeared port | |
506 | * is not opened again as valid due to the cached plogi data in | |
507 | * non-NPIV mode. | |
a2fa0aed CS |
508 | */ |
509 | static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) | |
510 | { | |
70932935 | 511 | struct zfcp_port *port; |
ea945ff8 SS |
512 | struct Scsi_Host *shost = rport_to_shost(rport); |
513 | struct zfcp_adapter *adapter = | |
514 | (struct zfcp_adapter *)shost->hostdata[0]; | |
70932935 | 515 | |
ea945ff8 | 516 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
a2fa0aed | 517 | |
70932935 | 518 | if (port) { |
ea4a3a6a | 519 | zfcp_erp_port_forced_reopen(port, 0, "sctrpi1"); |
615f59e0 | 520 | put_device(&port->dev); |
70932935 | 521 | } |
a2fa0aed CS |
522 | } |
523 | ||
524 | static void zfcp_scsi_rport_register(struct zfcp_port *port) | |
525 | { | |
526 | struct fc_rport_identifiers ids; | |
527 | struct fc_rport *rport; | |
528 | ||
379d6bf6 CS |
529 | if (port->rport) |
530 | return; | |
531 | ||
a2fa0aed CS |
532 | ids.node_name = port->wwnn; |
533 | ids.port_name = port->wwpn; | |
534 | ids.port_id = port->d_id; | |
535 | ids.roles = FC_RPORT_ROLE_FCP_TARGET; | |
536 | ||
537 | rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); | |
538 | if (!rport) { | |
539 | dev_err(&port->adapter->ccw_device->dev, | |
540 | "Registering port 0x%016Lx failed\n", | |
541 | (unsigned long long)port->wwpn); | |
542 | return; | |
543 | } | |
544 | ||
a2fa0aed CS |
545 | rport->maxframe_size = port->maxframe_size; |
546 | rport->supported_classes = port->supported_classes; | |
547 | port->rport = rport; | |
1bf3ff02 | 548 | port->starget_id = rport->scsi_target_id; |
5a7de559 | 549 | |
1daa4eb5 | 550 | zfcp_unit_queue_scsi_scan(port); |
a2fa0aed CS |
551 | } |
552 | ||
553 | static void zfcp_scsi_rport_block(struct zfcp_port *port) | |
554 | { | |
70932935 CS |
555 | struct fc_rport *rport = port->rport; |
556 | ||
379d6bf6 | 557 | if (rport) { |
70932935 | 558 | fc_remote_port_delete(rport); |
379d6bf6 CS |
559 | port->rport = NULL; |
560 | } | |
a2fa0aed CS |
561 | } |
562 | ||
563 | void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) | |
564 | { | |
615f59e0 | 565 | get_device(&port->dev); |
a2fa0aed CS |
566 | port->rport_task = RPORT_ADD; |
567 | ||
4544683a | 568 | if (!queue_work(port->adapter->work_queue, &port->rport_work)) |
615f59e0 | 569 | put_device(&port->dev); |
a2fa0aed CS |
570 | } |
571 | ||
572 | void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) | |
573 | { | |
615f59e0 | 574 | get_device(&port->dev); |
a2fa0aed CS |
575 | port->rport_task = RPORT_DEL; |
576 | ||
4544683a SS |
577 | if (port->rport && queue_work(port->adapter->work_queue, |
578 | &port->rport_work)) | |
a67417ab SS |
579 | return; |
580 | ||
615f59e0 | 581 | put_device(&port->dev); |
a2fa0aed CS |
582 | } |
583 | ||
584 | void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) | |
585 | { | |
ecf0c772 | 586 | unsigned long flags; |
a2fa0aed CS |
587 | struct zfcp_port *port; |
588 | ||
ecf0c772 SS |
589 | read_lock_irqsave(&adapter->port_list_lock, flags); |
590 | list_for_each_entry(port, &adapter->port_list, list) | |
a2fa0aed | 591 | zfcp_scsi_schedule_rport_block(port); |
ecf0c772 | 592 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
a2fa0aed CS |
593 | } |
594 | ||
595 | void zfcp_scsi_rport_work(struct work_struct *work) | |
596 | { | |
597 | struct zfcp_port *port = container_of(work, struct zfcp_port, | |
598 | rport_work); | |
599 | ||
600 | while (port->rport_task) { | |
601 | if (port->rport_task == RPORT_ADD) { | |
602 | port->rport_task = RPORT_NONE; | |
603 | zfcp_scsi_rport_register(port); | |
604 | } else { | |
605 | port->rport_task = RPORT_NONE; | |
606 | zfcp_scsi_rport_block(port); | |
607 | } | |
608 | } | |
609 | ||
615f59e0 | 610 | put_device(&port->dev); |
a2fa0aed CS |
611 | } |
612 | ||
ef3eb71d FB |
613 | /** |
614 | * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host | |
615 | * @adapter: The adapter where to configure DIF/DIX for the SCSI host | |
616 | */ | |
617 | void zfcp_scsi_set_prot(struct zfcp_adapter *adapter) | |
618 | { | |
619 | unsigned int mask = 0; | |
620 | unsigned int data_div; | |
621 | struct Scsi_Host *shost = adapter->scsi_host; | |
622 | ||
623 | data_div = atomic_read(&adapter->status) & | |
624 | ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED; | |
625 | ||
626 | if (enable_dif && | |
627 | adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1) | |
628 | mask |= SHOST_DIF_TYPE1_PROTECTION; | |
629 | ||
630 | if (enable_dif && data_div && | |
631 | adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) { | |
632 | mask |= SHOST_DIX_TYPE1_PROTECTION; | |
633 | scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP); | |
175b79f0 | 634 | shost->sg_prot_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ / 2; |
ef3eb71d FB |
635 | shost->sg_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ / 2; |
636 | shost->max_sectors = ZFCP_QDIO_MAX_SBALES_PER_REQ * 8 / 2; | |
637 | } | |
638 | ||
639 | scsi_host_set_prot(shost, mask); | |
640 | } | |
641 | ||
642 | /** | |
643 | * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error | |
644 | * @scmd: The SCSI command to report the error for | |
645 | * @ascq: The ASCQ to put in the sense buffer | |
646 | * | |
647 | * See the error handling in sd_done for the sense codes used here. | |
648 | * Set DID_SOFT_ERROR to retry the request, if possible. | |
649 | */ | |
650 | void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq) | |
651 | { | |
652 | scsi_build_sense_buffer(1, scmd->sense_buffer, | |
653 | ILLEGAL_REQUEST, 0x10, ascq); | |
654 | set_driver_byte(scmd, DRIVER_SENSE); | |
655 | scmd->result |= SAM_STAT_CHECK_CONDITION; | |
656 | set_host_byte(scmd, DID_SOFT_ERROR); | |
657 | } | |
658 | ||
1da177e4 | 659 | struct fc_function_template zfcp_transport_functions = { |
1da177e4 LT |
660 | .show_starget_port_id = 1, |
661 | .show_starget_port_name = 1, | |
662 | .show_starget_node_name = 1, | |
3859f6a2 | 663 | .show_rport_supported_classes = 1, |
75bfc283 | 664 | .show_rport_maxframe_size = 1, |
338151e0 | 665 | .show_rport_dev_loss_tmo = 1, |
3859f6a2 AH |
666 | .show_host_node_name = 1, |
667 | .show_host_port_name = 1, | |
ad757cdf | 668 | .show_host_permanent_port_name = 1, |
3859f6a2 | 669 | .show_host_supported_classes = 1, |
0fdd2133 | 670 | .show_host_supported_fc4s = 1, |
ad757cdf | 671 | .show_host_supported_speeds = 1, |
13e1e1f0 | 672 | .show_host_maxframe_size = 1, |
3859f6a2 | 673 | .show_host_serial_number = 1, |
f6cd94b1 AH |
674 | .get_fc_host_stats = zfcp_get_fc_host_stats, |
675 | .reset_fc_host_stats = zfcp_reset_fc_host_stats, | |
338151e0 | 676 | .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, |
85a82392 | 677 | .get_host_port_state = zfcp_get_host_port_state, |
a2fa0aed | 678 | .terminate_rport_io = zfcp_scsi_terminate_rport_io, |
85a82392 | 679 | .show_host_port_state = 1, |
0fdd2133 | 680 | .show_host_active_fc4s = 1, |
7c7dc196 | 681 | .bsg_request = zfcp_fc_exec_bsg_job, |
491ca442 | 682 | .bsg_timeout = zfcp_fc_timeout_bsg_job, |
f6cd94b1 AH |
683 | /* no functions registered for following dynamic attributes but |
684 | directly set by LLDD */ | |
ad757cdf | 685 | .show_host_port_type = 1, |
13e1e1f0 AH |
686 | .show_host_speed = 1, |
687 | .show_host_port_id = 1, | |
7c7dc196 | 688 | .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), |
1da177e4 LT |
689 | }; |
690 | ||
f76af7d7 MP |
691 | struct zfcp_data zfcp_data = { |
692 | .scsi_host_template = { | |
693 | .name = "zfcp", | |
694 | .module = THIS_MODULE, | |
695 | .proc_name = "zfcp", | |
a40a1baf | 696 | .change_queue_depth = zfcp_scsi_change_queue_depth, |
f76af7d7 MP |
697 | .slave_alloc = zfcp_scsi_slave_alloc, |
698 | .slave_configure = zfcp_scsi_slave_configure, | |
699 | .slave_destroy = zfcp_scsi_slave_destroy, | |
700 | .queuecommand = zfcp_scsi_queuecommand, | |
701 | .eh_abort_handler = zfcp_scsi_eh_abort_handler, | |
702 | .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, | |
703 | .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, | |
704 | .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, | |
705 | .can_queue = 4096, | |
706 | .this_id = -1, | |
01b04759 | 707 | .sg_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ, |
f76af7d7 MP |
708 | .cmd_per_lun = 1, |
709 | .use_clustering = 1, | |
710 | .sdev_attrs = zfcp_sysfs_sdev_attrs, | |
01b04759 | 711 | .max_sectors = (ZFCP_QDIO_MAX_SBALES_PER_REQ * 8), |
68322984 | 712 | .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, |
60221920 | 713 | .shost_attrs = zfcp_sysfs_shost_attrs, |
f76af7d7 MP |
714 | }, |
715 | }; |