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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 | * |
a53c8fab | 6 | * Copyright IBM Corp. 2002, 2010 |
1da177e4 LT |
7 | */ |
8 | ||
ecf39d42 CS |
9 | #define KMSG_COMPONENT "zfcp" |
10 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
11 | ||
3a4c5d59 | 12 | #include <linux/module.h> |
4318e08c | 13 | #include <linux/types.h> |
5a0e3ad6 | 14 | #include <linux/slab.h> |
4318e08c | 15 | #include <scsi/fc/fc_fcp.h> |
ef3eb71d | 16 | #include <scsi/scsi_eh.h> |
60063497 | 17 | #include <linux/atomic.h> |
dcd20e23 CS |
18 | #include "zfcp_ext.h" |
19 | #include "zfcp_dbf.h" | |
7c7dc196 | 20 | #include "zfcp_fc.h" |
b6bd2fb9 | 21 | #include "zfcp_reqlist.h" |
1da177e4 | 22 | |
a40a1baf CS |
23 | static unsigned int default_depth = 32; |
24 | module_param_named(queue_depth, default_depth, uint, 0600); | |
25 | MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices"); | |
26 | ||
ef3eb71d | 27 | static bool enable_dif; |
cc405ace | 28 | module_param_named(dif, enable_dif, bool, 0400); |
ef3eb71d | 29 | MODULE_PARM_DESC(dif, "Enable DIF/DIX data integrity support"); |
ef3eb71d | 30 | |
0d81b4e8 CS |
31 | static bool allow_lun_scan = 1; |
32 | module_param(allow_lun_scan, bool, 0600); | |
33 | MODULE_PARM_DESC(allow_lun_scan, "For NPIV, scan and attach all storage LUNs"); | |
34 | ||
e881a172 MC |
35 | static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth, |
36 | int reason) | |
a40a1baf | 37 | { |
42e62a74 CS |
38 | switch (reason) { |
39 | case SCSI_QDEPTH_DEFAULT: | |
40 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
41 | break; | |
42 | case SCSI_QDEPTH_QFULL: | |
43 | scsi_track_queue_full(sdev, depth); | |
44 | break; | |
45 | case SCSI_QDEPTH_RAMP_UP: | |
46 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
47 | break; | |
48 | default: | |
e881a172 | 49 | return -EOPNOTSUPP; |
42e62a74 | 50 | } |
a40a1baf CS |
51 | return sdev->queue_depth; |
52 | } | |
53 | ||
b62a8d9b | 54 | static void zfcp_scsi_slave_destroy(struct scsi_device *sdev) |
1da177e4 | 55 | { |
b62a8d9b CS |
56 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
57 | ||
44f747ff SM |
58 | /* if previous slave_alloc returned early, there is nothing to do */ |
59 | if (!zfcp_sdev->port) | |
60 | return; | |
61 | ||
b62a8d9b CS |
62 | zfcp_erp_lun_shutdown_wait(sdev, "scssd_1"); |
63 | put_device(&zfcp_sdev->port->dev); | |
1da177e4 LT |
64 | } |
65 | ||
f76af7d7 | 66 | static int zfcp_scsi_slave_configure(struct scsi_device *sdp) |
1da177e4 LT |
67 | { |
68 | if (sdp->tagged_supported) | |
a40a1baf | 69 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth); |
1da177e4 LT |
70 | else |
71 | scsi_adjust_queue_depth(sdp, 0, 1); | |
72 | return 0; | |
73 | } | |
74 | ||
f76af7d7 | 75 | static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) |
1da177e4 | 76 | { |
feac6a07 | 77 | set_host_byte(scpnt, result); |
250a1352 | 78 | zfcp_dbf_scsi_fail_send(scpnt); |
1da177e4 LT |
79 | scpnt->scsi_done(scpnt); |
80 | } | |
81 | ||
e55f8753 CS |
82 | static |
83 | int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt) | |
1da177e4 | 84 | { |
b62a8d9b | 85 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
a2fa0aed | 86 | struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); |
b62a8d9b | 87 | int status, scsi_result, ret; |
1da177e4 LT |
88 | |
89 | /* reset the status for this request */ | |
90 | scpnt->result = 0; | |
91 | scpnt->host_scribble = NULL; | |
1da177e4 | 92 | |
a2fa0aed CS |
93 | scsi_result = fc_remote_port_chkready(rport); |
94 | if (unlikely(scsi_result)) { | |
95 | scpnt->result = scsi_result; | |
250a1352 | 96 | zfcp_dbf_scsi_fail_send(scpnt); |
a2fa0aed CS |
97 | scpnt->scsi_done(scpnt); |
98 | return 0; | |
99 | } | |
100 | ||
b62a8d9b | 101 | status = atomic_read(&zfcp_sdev->status); |
8830271c | 102 | if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) && |
b62a8d9b | 103 | !(atomic_read(&zfcp_sdev->port->status) & |
8830271c | 104 | ZFCP_STATUS_COMMON_ERP_FAILED)) { |
b62a8d9b | 105 | /* only LUN access denied, but port is good |
8830271c | 106 | * not covered by FC transport, have to fail here */ |
f76af7d7 | 107 | zfcp_scsi_command_fail(scpnt, DID_ERROR); |
a419aef8 | 108 | return 0; |
f76af7d7 MP |
109 | } |
110 | ||
8830271c CS |
111 | if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { |
112 | /* This could be either | |
b62a8d9b CS |
113 | * open LUN pending: this is temporary, will result in |
114 | * open LUN or ERP_FAILED, so retry command | |
8830271c CS |
115 | * call to rport_delete pending: mimic retry from |
116 | * fc_remote_port_chkready until rport is BLOCKED | |
117 | */ | |
118 | zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY); | |
119 | return 0; | |
120 | } | |
121 | ||
b62a8d9b | 122 | ret = zfcp_fsf_fcp_cmnd(scpnt); |
f76af7d7 | 123 | if (unlikely(ret == -EBUSY)) |
f7a65e92 | 124 | return SCSI_MLQUEUE_DEVICE_BUSY; |
f76af7d7 MP |
125 | else if (unlikely(ret < 0)) |
126 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 127 | |
f76af7d7 | 128 | return ret; |
1da177e4 LT |
129 | } |
130 | ||
b62a8d9b | 131 | static int zfcp_scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 132 | { |
b62a8d9b CS |
133 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
134 | struct zfcp_adapter *adapter = | |
135 | (struct zfcp_adapter *) sdev->host->hostdata[0]; | |
136 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); | |
1da177e4 | 137 | struct zfcp_port *port; |
f76af7d7 | 138 | struct zfcp_unit *unit; |
0d81b4e8 | 139 | int npiv = adapter->connection_features & FSF_FEATURE_NPIV_MODE; |
1da177e4 | 140 | |
b62a8d9b CS |
141 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
142 | if (!port) | |
143 | return -ENXIO; | |
f76af7d7 | 144 | |
b62a8d9b CS |
145 | unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev)); |
146 | if (unit) | |
147 | put_device(&unit->dev); | |
f76af7d7 | 148 | |
0d81b4e8 | 149 | if (!unit && !(allow_lun_scan && npiv)) { |
b62a8d9b CS |
150 | put_device(&port->dev); |
151 | return -ENXIO; | |
f76af7d7 | 152 | } |
f76af7d7 | 153 | |
b62a8d9b CS |
154 | zfcp_sdev->port = port; |
155 | zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF; | |
156 | zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF; | |
157 | zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF; | |
158 | zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF; | |
159 | zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF; | |
160 | zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF; | |
161 | spin_lock_init(&zfcp_sdev->latencies.lock); | |
f76af7d7 | 162 | |
edaed859 | 163 | zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING); |
ea4a3a6a | 164 | zfcp_erp_lun_reopen(sdev, 0, "scsla_1"); |
b62a8d9b CS |
165 | zfcp_erp_wait(port->adapter); |
166 | ||
167 | return 0; | |
1da177e4 LT |
168 | } |
169 | ||
2b67fc46 | 170 | static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 171 | { |
63caf367 CS |
172 | struct Scsi_Host *scsi_host = scpnt->device->host; |
173 | struct zfcp_adapter *adapter = | |
174 | (struct zfcp_adapter *) scsi_host->hostdata[0]; | |
63caf367 | 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); |
250a1352 | 188 | zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL); |
c6936e7f | 189 | return FAILED; /* completion could be in progress */ |
1da177e4 | 190 | } |
63caf367 | 191 | old_req->data = NULL; |
1da177e4 | 192 | |
4eff4a36 | 193 | /* don't access old fsf_req after releasing the abort_lock */ |
1da177e4 | 194 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
4eff4a36 | 195 | |
63caf367 | 196 | while (retry--) { |
b62a8d9b | 197 | abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt); |
63caf367 CS |
198 | if (abrt_req) |
199 | break; | |
200 | ||
201 | zfcp_erp_wait(adapter); | |
a1dbfddd | 202 | ret = fc_block_scsi_eh(scpnt); |
250a1352 SS |
203 | if (ret) { |
204 | zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL); | |
a1dbfddd | 205 | return ret; |
250a1352 | 206 | } |
63caf367 CS |
207 | if (!(atomic_read(&adapter->status) & |
208 | ZFCP_STATUS_COMMON_RUNNING)) { | |
250a1352 | 209 | zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL); |
63caf367 CS |
210 | return SUCCESS; |
211 | } | |
1da177e4 | 212 | } |
250a1352 SS |
213 | if (!abrt_req) { |
214 | zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL); | |
63caf367 | 215 | return FAILED; |
250a1352 | 216 | } |
1da177e4 | 217 | |
058b8647 | 218 | wait_for_completion(&abrt_req->completion); |
059c97d0 | 219 | |
63caf367 | 220 | if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) |
250a1352 | 221 | dbf_tag = "abrt_ok"; |
63caf367 | 222 | else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) |
250a1352 | 223 | dbf_tag = "abrt_nn"; |
63caf367 | 224 | else { |
250a1352 | 225 | dbf_tag = "abrt_fa"; |
1da177e4 | 226 | retval = FAILED; |
1da177e4 | 227 | } |
250a1352 | 228 | zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req); |
63caf367 | 229 | zfcp_fsf_req_free(abrt_req); |
f76af7d7 | 230 | return retval; |
1da177e4 LT |
231 | } |
232 | ||
63caf367 | 233 | static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) |
1da177e4 | 234 | { |
b62a8d9b CS |
235 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
236 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
564e1c86 | 237 | struct zfcp_fsf_req *fsf_req = NULL; |
a1dbfddd | 238 | int retval = SUCCESS, ret; |
63caf367 CS |
239 | int retry = 3; |
240 | ||
241 | while (retry--) { | |
b62a8d9b | 242 | fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags); |
63caf367 CS |
243 | if (fsf_req) |
244 | break; | |
245 | ||
246 | zfcp_erp_wait(adapter); | |
a1dbfddd CS |
247 | ret = fc_block_scsi_eh(scpnt); |
248 | if (ret) | |
249 | return ret; | |
250 | ||
63caf367 CS |
251 | if (!(atomic_read(&adapter->status) & |
252 | ZFCP_STATUS_COMMON_RUNNING)) { | |
b62a8d9b | 253 | zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags); |
63caf367 CS |
254 | return SUCCESS; |
255 | } | |
1da177e4 | 256 | } |
63caf367 CS |
257 | if (!fsf_req) |
258 | return FAILED; | |
1da177e4 | 259 | |
058b8647 | 260 | wait_for_completion(&fsf_req->completion); |
77eb1699 | 261 | |
8a36e453 | 262 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { |
b62a8d9b | 263 | zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags); |
f76af7d7 | 264 | retval = FAILED; |
8a36e453 | 265 | } else |
b62a8d9b | 266 | zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags); |
77eb1699 AH |
267 | |
268 | zfcp_fsf_req_free(fsf_req); | |
1da177e4 LT |
269 | return retval; |
270 | } | |
271 | ||
f76af7d7 MP |
272 | static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) |
273 | { | |
4318e08c | 274 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); |
f76af7d7 MP |
275 | } |
276 | ||
277 | static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) | |
278 | { | |
4318e08c | 279 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); |
f76af7d7 MP |
280 | } |
281 | ||
2b67fc46 | 282 | static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 283 | { |
b62a8d9b CS |
284 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
285 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
a1dbfddd | 286 | int ret; |
1da177e4 | 287 | |
ea4a3a6a | 288 | zfcp_erp_adapter_reopen(adapter, 0, "schrh_1"); |
81654286 | 289 | zfcp_erp_wait(adapter); |
a1dbfddd CS |
290 | ret = fc_block_scsi_eh(scpnt); |
291 | if (ret) | |
292 | return ret; | |
1da177e4 | 293 | |
810f1e3e | 294 | return SUCCESS; |
1da177e4 LT |
295 | } |
296 | ||
1947c72a CS |
297 | struct scsi_transport_template *zfcp_scsi_transport_template; |
298 | ||
299 | static struct scsi_host_template zfcp_scsi_host_template = { | |
300 | .module = THIS_MODULE, | |
301 | .name = "zfcp", | |
302 | .queuecommand = zfcp_scsi_queuecommand, | |
303 | .eh_abort_handler = zfcp_scsi_eh_abort_handler, | |
304 | .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, | |
305 | .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, | |
306 | .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, | |
307 | .slave_alloc = zfcp_scsi_slave_alloc, | |
308 | .slave_configure = zfcp_scsi_slave_configure, | |
309 | .slave_destroy = zfcp_scsi_slave_destroy, | |
310 | .change_queue_depth = zfcp_scsi_change_queue_depth, | |
311 | .proc_name = "zfcp", | |
312 | .can_queue = 4096, | |
313 | .this_id = -1, | |
86a9668a SS |
314 | .sg_tablesize = 1, /* adjusted later */ |
315 | .max_sectors = 8, /* adjusted later */ | |
1947c72a CS |
316 | .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, |
317 | .cmd_per_lun = 1, | |
318 | .use_clustering = 1, | |
319 | .shost_attrs = zfcp_sysfs_shost_attrs, | |
320 | .sdev_attrs = zfcp_sysfs_sdev_attrs, | |
321 | }; | |
322 | ||
323 | /** | |
324 | * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer | |
325 | * @adapter: The zfcp adapter to register with the SCSI midlayer | |
326 | */ | |
327 | int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter) | |
1da177e4 | 328 | { |
f76af7d7 | 329 | struct ccw_dev_id dev_id; |
1da177e4 | 330 | |
9f28745a | 331 | if (adapter->scsi_host) |
f76af7d7 | 332 | return 0; |
9f28745a | 333 | |
f76af7d7 | 334 | ccw_device_get_id(adapter->ccw_device, &dev_id); |
1da177e4 | 335 | /* register adapter as SCSI host with mid layer of SCSI stack */ |
1947c72a | 336 | adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template, |
1da177e4 LT |
337 | sizeof (struct zfcp_adapter *)); |
338 | if (!adapter->scsi_host) { | |
553448f6 | 339 | dev_err(&adapter->ccw_device->dev, |
ff3b24fa CS |
340 | "Registering the FCP device with the " |
341 | "SCSI stack failed\n"); | |
f76af7d7 | 342 | return -EIO; |
1da177e4 | 343 | } |
1da177e4 LT |
344 | |
345 | /* tell the SCSI stack some characteristics of this adapter */ | |
f8210e34 CS |
346 | adapter->scsi_host->max_id = 511; |
347 | adapter->scsi_host->max_lun = 0xFFFFFFFF; | |
1da177e4 | 348 | adapter->scsi_host->max_channel = 0; |
f76af7d7 | 349 | adapter->scsi_host->unique_id = dev_id.devno; |
4318e08c | 350 | adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ |
1947c72a | 351 | adapter->scsi_host->transportt = zfcp_scsi_transport_template; |
1da177e4 | 352 | |
1da177e4 LT |
353 | adapter->scsi_host->hostdata[0] = (unsigned long) adapter; |
354 | ||
355 | if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { | |
356 | scsi_host_put(adapter->scsi_host); | |
f76af7d7 | 357 | return -EIO; |
1da177e4 | 358 | } |
f76af7d7 MP |
359 | |
360 | return 0; | |
1da177e4 LT |
361 | } |
362 | ||
1947c72a CS |
363 | /** |
364 | * zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer | |
365 | * @adapter: The zfcp adapter to unregister. | |
366 | */ | |
367 | void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter) | |
1da177e4 LT |
368 | { |
369 | struct Scsi_Host *shost; | |
13e1e1f0 | 370 | struct zfcp_port *port; |
1da177e4 LT |
371 | |
372 | shost = adapter->scsi_host; | |
373 | if (!shost) | |
374 | return; | |
f76af7d7 | 375 | |
ecf0c772 SS |
376 | read_lock_irq(&adapter->port_list_lock); |
377 | list_for_each_entry(port, &adapter->port_list, list) | |
f3450c7b | 378 | port->rport = NULL; |
ecf0c772 | 379 | read_unlock_irq(&adapter->port_list_lock); |
f76af7d7 | 380 | |
3859f6a2 | 381 | fc_remove_host(shost); |
1da177e4 LT |
382 | scsi_remove_host(shost); |
383 | scsi_host_put(shost); | |
384 | adapter->scsi_host = NULL; | |
1da177e4 LT |
385 | } |
386 | ||
f6cd94b1 AH |
387 | static struct fc_host_statistics* |
388 | zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) | |
1da177e4 | 389 | { |
f6cd94b1 | 390 | struct fc_host_statistics *fc_stats; |
1da177e4 | 391 | |
f6cd94b1 AH |
392 | if (!adapter->fc_stats) { |
393 | fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); | |
394 | if (!fc_stats) | |
395 | return NULL; | |
f3450c7b | 396 | adapter->fc_stats = fc_stats; /* freed in adapter_release */ |
f6cd94b1 AH |
397 | } |
398 | memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); | |
399 | return adapter->fc_stats; | |
1da177e4 LT |
400 | } |
401 | ||
f76af7d7 MP |
402 | static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, |
403 | struct fsf_qtcb_bottom_port *data, | |
404 | struct fsf_qtcb_bottom_port *old) | |
1da177e4 | 405 | { |
f76af7d7 MP |
406 | fc_stats->seconds_since_last_reset = |
407 | data->seconds_since_last_reset - old->seconds_since_last_reset; | |
f6cd94b1 AH |
408 | fc_stats->tx_frames = data->tx_frames - old->tx_frames; |
409 | fc_stats->tx_words = data->tx_words - old->tx_words; | |
410 | fc_stats->rx_frames = data->rx_frames - old->rx_frames; | |
411 | fc_stats->rx_words = data->rx_words - old->rx_words; | |
412 | fc_stats->lip_count = data->lip - old->lip; | |
413 | fc_stats->nos_count = data->nos - old->nos; | |
414 | fc_stats->error_frames = data->error_frames - old->error_frames; | |
415 | fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; | |
416 | fc_stats->link_failure_count = data->link_failure - old->link_failure; | |
417 | fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; | |
f76af7d7 MP |
418 | fc_stats->loss_of_signal_count = |
419 | data->loss_of_signal - old->loss_of_signal; | |
420 | fc_stats->prim_seq_protocol_err_count = | |
421 | data->psp_error_counts - old->psp_error_counts; | |
422 | fc_stats->invalid_tx_word_count = | |
423 | data->invalid_tx_words - old->invalid_tx_words; | |
f6cd94b1 | 424 | fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; |
f76af7d7 MP |
425 | fc_stats->fcp_input_requests = |
426 | data->input_requests - old->input_requests; | |
427 | fc_stats->fcp_output_requests = | |
428 | data->output_requests - old->output_requests; | |
429 | fc_stats->fcp_control_requests = | |
430 | data->control_requests - old->control_requests; | |
f6cd94b1 AH |
431 | fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; |
432 | fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; | |
433 | } | |
1da177e4 | 434 | |
f76af7d7 MP |
435 | static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, |
436 | struct fsf_qtcb_bottom_port *data) | |
f6cd94b1 AH |
437 | { |
438 | fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; | |
439 | fc_stats->tx_frames = data->tx_frames; | |
440 | fc_stats->tx_words = data->tx_words; | |
441 | fc_stats->rx_frames = data->rx_frames; | |
442 | fc_stats->rx_words = data->rx_words; | |
443 | fc_stats->lip_count = data->lip; | |
444 | fc_stats->nos_count = data->nos; | |
445 | fc_stats->error_frames = data->error_frames; | |
446 | fc_stats->dumped_frames = data->dumped_frames; | |
447 | fc_stats->link_failure_count = data->link_failure; | |
448 | fc_stats->loss_of_sync_count = data->loss_of_sync; | |
449 | fc_stats->loss_of_signal_count = data->loss_of_signal; | |
450 | fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; | |
451 | fc_stats->invalid_tx_word_count = data->invalid_tx_words; | |
452 | fc_stats->invalid_crc_count = data->invalid_crcs; | |
453 | fc_stats->fcp_input_requests = data->input_requests; | |
454 | fc_stats->fcp_output_requests = data->output_requests; | |
455 | fc_stats->fcp_control_requests = data->control_requests; | |
456 | fc_stats->fcp_input_megabytes = data->input_mb; | |
457 | fc_stats->fcp_output_megabytes = data->output_mb; | |
458 | } | |
459 | ||
f76af7d7 | 460 | static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) |
f6cd94b1 AH |
461 | { |
462 | struct zfcp_adapter *adapter; | |
463 | struct fc_host_statistics *fc_stats; | |
464 | struct fsf_qtcb_bottom_port *data; | |
465 | int ret; | |
466 | ||
f76af7d7 | 467 | adapter = (struct zfcp_adapter *)host->hostdata[0]; |
f6cd94b1 AH |
468 | fc_stats = zfcp_init_fc_host_stats(adapter); |
469 | if (!fc_stats) | |
470 | return NULL; | |
471 | ||
ec4081c6 | 472 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
473 | if (!data) |
474 | return NULL; | |
f6cd94b1 | 475 | |
564e1c86 | 476 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f6cd94b1 AH |
477 | if (ret) { |
478 | kfree(data); | |
f76af7d7 | 479 | return NULL; |
f6cd94b1 AH |
480 | } |
481 | ||
482 | if (adapter->stats_reset && | |
483 | ((jiffies/HZ - adapter->stats_reset) < | |
f76af7d7 | 484 | data->seconds_since_last_reset)) |
f6cd94b1 AH |
485 | zfcp_adjust_fc_host_stats(fc_stats, data, |
486 | adapter->stats_reset_data); | |
f76af7d7 | 487 | else |
f6cd94b1 AH |
488 | zfcp_set_fc_host_stats(fc_stats, data); |
489 | ||
490 | kfree(data); | |
491 | return fc_stats; | |
1da177e4 LT |
492 | } |
493 | ||
f76af7d7 | 494 | static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) |
1da177e4 | 495 | { |
f6cd94b1 | 496 | struct zfcp_adapter *adapter; |
f76af7d7 | 497 | struct fsf_qtcb_bottom_port *data; |
f6cd94b1 | 498 | int ret; |
1da177e4 | 499 | |
f6cd94b1 | 500 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; |
ec4081c6 | 501 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
502 | if (!data) |
503 | return; | |
f6cd94b1 | 504 | |
564e1c86 | 505 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f76af7d7 | 506 | if (ret) |
83f6d6d7 | 507 | kfree(data); |
f76af7d7 | 508 | else { |
f6cd94b1 | 509 | adapter->stats_reset = jiffies/HZ; |
f76af7d7 | 510 | kfree(adapter->stats_reset_data); |
f6cd94b1 | 511 | adapter->stats_reset_data = data; /* finally freed in |
f3450c7b | 512 | adapter_release */ |
f6cd94b1 | 513 | } |
1da177e4 LT |
514 | } |
515 | ||
85a82392 SS |
516 | static void zfcp_get_host_port_state(struct Scsi_Host *shost) |
517 | { | |
518 | struct zfcp_adapter *adapter = | |
519 | (struct zfcp_adapter *)shost->hostdata[0]; | |
520 | int status = atomic_read(&adapter->status); | |
521 | ||
522 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && | |
523 | !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) | |
524 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
525 | else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) | |
526 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
527 | else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
528 | fc_host_port_state(shost) = FC_PORTSTATE_ERROR; | |
529 | else | |
530 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
531 | } | |
532 | ||
338151e0 AH |
533 | static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
534 | { | |
535 | rport->dev_loss_tmo = timeout; | |
536 | } | |
537 | ||
a2fa0aed CS |
538 | /** |
539 | * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport | |
540 | * @rport: The FC rport where to teminate I/O | |
541 | * | |
542 | * Abort all pending SCSI commands for a port by closing the | |
835dc298 CS |
543 | * port. Using a reopen avoids a conflict with a shutdown |
544 | * overwriting a reopen. The "forced" ensures that a disappeared port | |
545 | * is not opened again as valid due to the cached plogi data in | |
546 | * non-NPIV mode. | |
a2fa0aed CS |
547 | */ |
548 | static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) | |
549 | { | |
70932935 | 550 | struct zfcp_port *port; |
ea945ff8 SS |
551 | struct Scsi_Host *shost = rport_to_shost(rport); |
552 | struct zfcp_adapter *adapter = | |
553 | (struct zfcp_adapter *)shost->hostdata[0]; | |
70932935 | 554 | |
ea945ff8 | 555 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
a2fa0aed | 556 | |
70932935 | 557 | if (port) { |
ea4a3a6a | 558 | zfcp_erp_port_forced_reopen(port, 0, "sctrpi1"); |
615f59e0 | 559 | put_device(&port->dev); |
70932935 | 560 | } |
a2fa0aed CS |
561 | } |
562 | ||
563 | static void zfcp_scsi_rport_register(struct zfcp_port *port) | |
564 | { | |
565 | struct fc_rport_identifiers ids; | |
566 | struct fc_rport *rport; | |
567 | ||
379d6bf6 CS |
568 | if (port->rport) |
569 | return; | |
570 | ||
a2fa0aed CS |
571 | ids.node_name = port->wwnn; |
572 | ids.port_name = port->wwpn; | |
573 | ids.port_id = port->d_id; | |
574 | ids.roles = FC_RPORT_ROLE_FCP_TARGET; | |
575 | ||
576 | rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); | |
577 | if (!rport) { | |
578 | dev_err(&port->adapter->ccw_device->dev, | |
579 | "Registering port 0x%016Lx failed\n", | |
580 | (unsigned long long)port->wwpn); | |
581 | return; | |
582 | } | |
583 | ||
a2fa0aed CS |
584 | rport->maxframe_size = port->maxframe_size; |
585 | rport->supported_classes = port->supported_classes; | |
586 | port->rport = rport; | |
1bf3ff02 | 587 | port->starget_id = rport->scsi_target_id; |
5a7de559 | 588 | |
1daa4eb5 | 589 | zfcp_unit_queue_scsi_scan(port); |
a2fa0aed CS |
590 | } |
591 | ||
592 | static void zfcp_scsi_rport_block(struct zfcp_port *port) | |
593 | { | |
70932935 CS |
594 | struct fc_rport *rport = port->rport; |
595 | ||
379d6bf6 | 596 | if (rport) { |
70932935 | 597 | fc_remote_port_delete(rport); |
379d6bf6 CS |
598 | port->rport = NULL; |
599 | } | |
a2fa0aed CS |
600 | } |
601 | ||
602 | void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) | |
603 | { | |
615f59e0 | 604 | get_device(&port->dev); |
a2fa0aed CS |
605 | port->rport_task = RPORT_ADD; |
606 | ||
4544683a | 607 | if (!queue_work(port->adapter->work_queue, &port->rport_work)) |
615f59e0 | 608 | put_device(&port->dev); |
a2fa0aed CS |
609 | } |
610 | ||
611 | void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) | |
612 | { | |
615f59e0 | 613 | get_device(&port->dev); |
a2fa0aed CS |
614 | port->rport_task = RPORT_DEL; |
615 | ||
4544683a SS |
616 | if (port->rport && queue_work(port->adapter->work_queue, |
617 | &port->rport_work)) | |
a67417ab SS |
618 | return; |
619 | ||
615f59e0 | 620 | put_device(&port->dev); |
a2fa0aed CS |
621 | } |
622 | ||
623 | void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) | |
624 | { | |
ecf0c772 | 625 | unsigned long flags; |
a2fa0aed CS |
626 | struct zfcp_port *port; |
627 | ||
ecf0c772 SS |
628 | read_lock_irqsave(&adapter->port_list_lock, flags); |
629 | list_for_each_entry(port, &adapter->port_list, list) | |
a2fa0aed | 630 | zfcp_scsi_schedule_rport_block(port); |
ecf0c772 | 631 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
a2fa0aed CS |
632 | } |
633 | ||
634 | void zfcp_scsi_rport_work(struct work_struct *work) | |
635 | { | |
636 | struct zfcp_port *port = container_of(work, struct zfcp_port, | |
637 | rport_work); | |
638 | ||
639 | while (port->rport_task) { | |
640 | if (port->rport_task == RPORT_ADD) { | |
641 | port->rport_task = RPORT_NONE; | |
642 | zfcp_scsi_rport_register(port); | |
643 | } else { | |
644 | port->rport_task = RPORT_NONE; | |
645 | zfcp_scsi_rport_block(port); | |
646 | } | |
647 | } | |
648 | ||
615f59e0 | 649 | put_device(&port->dev); |
a2fa0aed CS |
650 | } |
651 | ||
ef3eb71d FB |
652 | /** |
653 | * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host | |
654 | * @adapter: The adapter where to configure DIF/DIX for the SCSI host | |
655 | */ | |
656 | void zfcp_scsi_set_prot(struct zfcp_adapter *adapter) | |
657 | { | |
658 | unsigned int mask = 0; | |
659 | unsigned int data_div; | |
660 | struct Scsi_Host *shost = adapter->scsi_host; | |
661 | ||
662 | data_div = atomic_read(&adapter->status) & | |
663 | ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED; | |
664 | ||
665 | if (enable_dif && | |
666 | adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1) | |
667 | mask |= SHOST_DIF_TYPE1_PROTECTION; | |
668 | ||
669 | if (enable_dif && data_div && | |
670 | adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) { | |
671 | mask |= SHOST_DIX_TYPE1_PROTECTION; | |
672 | scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP); | |
86a9668a SS |
673 | shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2; |
674 | shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2; | |
675 | shost->max_sectors = shost->sg_tablesize * 8; | |
ef3eb71d FB |
676 | } |
677 | ||
678 | scsi_host_set_prot(shost, mask); | |
679 | } | |
680 | ||
681 | /** | |
682 | * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error | |
683 | * @scmd: The SCSI command to report the error for | |
684 | * @ascq: The ASCQ to put in the sense buffer | |
685 | * | |
686 | * See the error handling in sd_done for the sense codes used here. | |
687 | * Set DID_SOFT_ERROR to retry the request, if possible. | |
688 | */ | |
689 | void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq) | |
690 | { | |
691 | scsi_build_sense_buffer(1, scmd->sense_buffer, | |
692 | ILLEGAL_REQUEST, 0x10, ascq); | |
693 | set_driver_byte(scmd, DRIVER_SENSE); | |
694 | scmd->result |= SAM_STAT_CHECK_CONDITION; | |
695 | set_host_byte(scmd, DID_SOFT_ERROR); | |
696 | } | |
697 | ||
1da177e4 | 698 | struct fc_function_template zfcp_transport_functions = { |
1da177e4 LT |
699 | .show_starget_port_id = 1, |
700 | .show_starget_port_name = 1, | |
701 | .show_starget_node_name = 1, | |
3859f6a2 | 702 | .show_rport_supported_classes = 1, |
75bfc283 | 703 | .show_rport_maxframe_size = 1, |
338151e0 | 704 | .show_rport_dev_loss_tmo = 1, |
3859f6a2 AH |
705 | .show_host_node_name = 1, |
706 | .show_host_port_name = 1, | |
ad757cdf | 707 | .show_host_permanent_port_name = 1, |
3859f6a2 | 708 | .show_host_supported_classes = 1, |
0fdd2133 | 709 | .show_host_supported_fc4s = 1, |
ad757cdf | 710 | .show_host_supported_speeds = 1, |
13e1e1f0 | 711 | .show_host_maxframe_size = 1, |
3859f6a2 | 712 | .show_host_serial_number = 1, |
f6cd94b1 AH |
713 | .get_fc_host_stats = zfcp_get_fc_host_stats, |
714 | .reset_fc_host_stats = zfcp_reset_fc_host_stats, | |
338151e0 | 715 | .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, |
85a82392 | 716 | .get_host_port_state = zfcp_get_host_port_state, |
a2fa0aed | 717 | .terminate_rport_io = zfcp_scsi_terminate_rport_io, |
85a82392 | 718 | .show_host_port_state = 1, |
0fdd2133 | 719 | .show_host_active_fc4s = 1, |
7c7dc196 | 720 | .bsg_request = zfcp_fc_exec_bsg_job, |
491ca442 | 721 | .bsg_timeout = zfcp_fc_timeout_bsg_job, |
f6cd94b1 AH |
722 | /* no functions registered for following dynamic attributes but |
723 | directly set by LLDD */ | |
ad757cdf | 724 | .show_host_port_type = 1, |
038d9446 | 725 | .show_host_symbolic_name = 1, |
13e1e1f0 AH |
726 | .show_host_speed = 1, |
727 | .show_host_port_id = 1, | |
7c7dc196 | 728 | .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), |
1da177e4 | 729 | }; |