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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 | * |
5fea4291 | 6 | * Copyright IBM Corp. 2002, 2013 |
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 | ||
b62a8d9b | 35 | static void zfcp_scsi_slave_destroy(struct scsi_device *sdev) |
1da177e4 | 36 | { |
b62a8d9b CS |
37 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
38 | ||
44f747ff SM |
39 | /* if previous slave_alloc returned early, there is nothing to do */ |
40 | if (!zfcp_sdev->port) | |
41 | return; | |
42 | ||
b62a8d9b CS |
43 | zfcp_erp_lun_shutdown_wait(sdev, "scssd_1"); |
44 | put_device(&zfcp_sdev->port->dev); | |
1da177e4 LT |
45 | } |
46 | ||
f76af7d7 | 47 | static int zfcp_scsi_slave_configure(struct scsi_device *sdp) |
1da177e4 LT |
48 | { |
49 | if (sdp->tagged_supported) | |
db5ed4df | 50 | scsi_change_queue_depth(sdp, default_depth); |
1da177e4 LT |
51 | return 0; |
52 | } | |
53 | ||
f76af7d7 | 54 | static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) |
1da177e4 | 55 | { |
feac6a07 | 56 | set_host_byte(scpnt, result); |
250a1352 | 57 | zfcp_dbf_scsi_fail_send(scpnt); |
1da177e4 LT |
58 | scpnt->scsi_done(scpnt); |
59 | } | |
60 | ||
e55f8753 CS |
61 | static |
62 | int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt) | |
1da177e4 | 63 | { |
b62a8d9b | 64 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
a2fa0aed | 65 | struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); |
b62a8d9b | 66 | int status, scsi_result, ret; |
1da177e4 LT |
67 | |
68 | /* reset the status for this request */ | |
69 | scpnt->result = 0; | |
70 | scpnt->host_scribble = NULL; | |
1da177e4 | 71 | |
a2fa0aed CS |
72 | scsi_result = fc_remote_port_chkready(rport); |
73 | if (unlikely(scsi_result)) { | |
74 | scpnt->result = scsi_result; | |
250a1352 | 75 | zfcp_dbf_scsi_fail_send(scpnt); |
a2fa0aed CS |
76 | scpnt->scsi_done(scpnt); |
77 | return 0; | |
78 | } | |
79 | ||
b62a8d9b | 80 | status = atomic_read(&zfcp_sdev->status); |
8830271c | 81 | if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) && |
b62a8d9b | 82 | !(atomic_read(&zfcp_sdev->port->status) & |
8830271c | 83 | ZFCP_STATUS_COMMON_ERP_FAILED)) { |
b62a8d9b | 84 | /* only LUN access denied, but port is good |
8830271c | 85 | * not covered by FC transport, have to fail here */ |
f76af7d7 | 86 | zfcp_scsi_command_fail(scpnt, DID_ERROR); |
a419aef8 | 87 | return 0; |
f76af7d7 MP |
88 | } |
89 | ||
8830271c CS |
90 | if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { |
91 | /* This could be either | |
b62a8d9b CS |
92 | * open LUN pending: this is temporary, will result in |
93 | * open LUN or ERP_FAILED, so retry command | |
8830271c CS |
94 | * call to rport_delete pending: mimic retry from |
95 | * fc_remote_port_chkready until rport is BLOCKED | |
96 | */ | |
97 | zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY); | |
98 | return 0; | |
99 | } | |
100 | ||
b62a8d9b | 101 | ret = zfcp_fsf_fcp_cmnd(scpnt); |
f76af7d7 | 102 | if (unlikely(ret == -EBUSY)) |
f7a65e92 | 103 | return SCSI_MLQUEUE_DEVICE_BUSY; |
f76af7d7 MP |
104 | else if (unlikely(ret < 0)) |
105 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 106 | |
f76af7d7 | 107 | return ret; |
1da177e4 LT |
108 | } |
109 | ||
b62a8d9b | 110 | static int zfcp_scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 111 | { |
b62a8d9b CS |
112 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
113 | struct zfcp_adapter *adapter = | |
114 | (struct zfcp_adapter *) sdev->host->hostdata[0]; | |
115 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); | |
1da177e4 | 116 | struct zfcp_port *port; |
f76af7d7 | 117 | struct zfcp_unit *unit; |
0d81b4e8 | 118 | int npiv = adapter->connection_features & FSF_FEATURE_NPIV_MODE; |
1da177e4 | 119 | |
b62a8d9b CS |
120 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
121 | if (!port) | |
122 | return -ENXIO; | |
f76af7d7 | 123 | |
b62a8d9b CS |
124 | unit = zfcp_unit_find(port, zfcp_scsi_dev_lun(sdev)); |
125 | if (unit) | |
126 | put_device(&unit->dev); | |
f76af7d7 | 127 | |
0d81b4e8 | 128 | if (!unit && !(allow_lun_scan && npiv)) { |
b62a8d9b CS |
129 | put_device(&port->dev); |
130 | return -ENXIO; | |
f76af7d7 | 131 | } |
f76af7d7 | 132 | |
b62a8d9b CS |
133 | zfcp_sdev->port = port; |
134 | zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF; | |
135 | zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF; | |
136 | zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF; | |
137 | zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF; | |
138 | zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF; | |
139 | zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF; | |
140 | spin_lock_init(&zfcp_sdev->latencies.lock); | |
f76af7d7 | 141 | |
edaed859 | 142 | zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING); |
ea4a3a6a | 143 | zfcp_erp_lun_reopen(sdev, 0, "scsla_1"); |
b62a8d9b CS |
144 | zfcp_erp_wait(port->adapter); |
145 | ||
146 | return 0; | |
1da177e4 LT |
147 | } |
148 | ||
2b67fc46 | 149 | static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 150 | { |
63caf367 CS |
151 | struct Scsi_Host *scsi_host = scpnt->device->host; |
152 | struct zfcp_adapter *adapter = | |
153 | (struct zfcp_adapter *) scsi_host->hostdata[0]; | |
63caf367 | 154 | struct zfcp_fsf_req *old_req, *abrt_req; |
1da177e4 | 155 | unsigned long flags; |
a11a52be | 156 | unsigned long old_reqid = (unsigned long) scpnt->host_scribble; |
a1dbfddd | 157 | int retval = SUCCESS, ret; |
63caf367 | 158 | int retry = 3; |
a11a52be | 159 | char *dbf_tag; |
1da177e4 | 160 | |
059c97d0 | 161 | /* avoid race condition between late normal completion and abort */ |
1da177e4 LT |
162 | write_lock_irqsave(&adapter->abort_lock, flags); |
163 | ||
b6bd2fb9 | 164 | old_req = zfcp_reqlist_find(adapter->req_list, old_reqid); |
63caf367 | 165 | if (!old_req) { |
1da177e4 | 166 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
250a1352 | 167 | zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL); |
c6936e7f | 168 | return FAILED; /* completion could be in progress */ |
1da177e4 | 169 | } |
63caf367 | 170 | old_req->data = NULL; |
1da177e4 | 171 | |
4eff4a36 | 172 | /* don't access old fsf_req after releasing the abort_lock */ |
1da177e4 | 173 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
4eff4a36 | 174 | |
63caf367 | 175 | while (retry--) { |
b62a8d9b | 176 | abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt); |
63caf367 CS |
177 | if (abrt_req) |
178 | break; | |
179 | ||
180 | zfcp_erp_wait(adapter); | |
a1dbfddd | 181 | ret = fc_block_scsi_eh(scpnt); |
250a1352 SS |
182 | if (ret) { |
183 | zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL); | |
a1dbfddd | 184 | return ret; |
250a1352 | 185 | } |
63caf367 CS |
186 | if (!(atomic_read(&adapter->status) & |
187 | ZFCP_STATUS_COMMON_RUNNING)) { | |
250a1352 | 188 | zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL); |
63caf367 CS |
189 | return SUCCESS; |
190 | } | |
1da177e4 | 191 | } |
250a1352 SS |
192 | if (!abrt_req) { |
193 | zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL); | |
63caf367 | 194 | return FAILED; |
250a1352 | 195 | } |
1da177e4 | 196 | |
058b8647 | 197 | wait_for_completion(&abrt_req->completion); |
059c97d0 | 198 | |
63caf367 | 199 | if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) |
250a1352 | 200 | dbf_tag = "abrt_ok"; |
63caf367 | 201 | else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) |
250a1352 | 202 | dbf_tag = "abrt_nn"; |
63caf367 | 203 | else { |
250a1352 | 204 | dbf_tag = "abrt_fa"; |
1da177e4 | 205 | retval = FAILED; |
1da177e4 | 206 | } |
250a1352 | 207 | zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req); |
63caf367 | 208 | zfcp_fsf_req_free(abrt_req); |
f76af7d7 | 209 | return retval; |
1da177e4 LT |
210 | } |
211 | ||
63caf367 | 212 | static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) |
1da177e4 | 213 | { |
b62a8d9b CS |
214 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
215 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
564e1c86 | 216 | struct zfcp_fsf_req *fsf_req = NULL; |
a1dbfddd | 217 | int retval = SUCCESS, ret; |
63caf367 CS |
218 | int retry = 3; |
219 | ||
220 | while (retry--) { | |
b62a8d9b | 221 | fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags); |
63caf367 CS |
222 | if (fsf_req) |
223 | break; | |
224 | ||
225 | zfcp_erp_wait(adapter); | |
a1dbfddd CS |
226 | ret = fc_block_scsi_eh(scpnt); |
227 | if (ret) | |
228 | return ret; | |
229 | ||
63caf367 CS |
230 | if (!(atomic_read(&adapter->status) & |
231 | ZFCP_STATUS_COMMON_RUNNING)) { | |
b62a8d9b | 232 | zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags); |
63caf367 CS |
233 | return SUCCESS; |
234 | } | |
1da177e4 | 235 | } |
63caf367 CS |
236 | if (!fsf_req) |
237 | return FAILED; | |
1da177e4 | 238 | |
058b8647 | 239 | wait_for_completion(&fsf_req->completion); |
77eb1699 | 240 | |
8a36e453 | 241 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { |
b62a8d9b | 242 | zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags); |
f76af7d7 | 243 | retval = FAILED; |
8a36e453 | 244 | } else |
b62a8d9b | 245 | zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags); |
77eb1699 AH |
246 | |
247 | zfcp_fsf_req_free(fsf_req); | |
1da177e4 LT |
248 | return retval; |
249 | } | |
250 | ||
f76af7d7 MP |
251 | static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) |
252 | { | |
4318e08c | 253 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); |
f76af7d7 MP |
254 | } |
255 | ||
256 | static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) | |
257 | { | |
4318e08c | 258 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); |
f76af7d7 MP |
259 | } |
260 | ||
2b67fc46 | 261 | static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 262 | { |
b62a8d9b CS |
263 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
264 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
a1dbfddd | 265 | int ret; |
1da177e4 | 266 | |
ea4a3a6a | 267 | zfcp_erp_adapter_reopen(adapter, 0, "schrh_1"); |
81654286 | 268 | zfcp_erp_wait(adapter); |
a1dbfddd CS |
269 | ret = fc_block_scsi_eh(scpnt); |
270 | if (ret) | |
271 | return ret; | |
1da177e4 | 272 | |
810f1e3e | 273 | return SUCCESS; |
1da177e4 LT |
274 | } |
275 | ||
1947c72a CS |
276 | struct scsi_transport_template *zfcp_scsi_transport_template; |
277 | ||
278 | static struct scsi_host_template zfcp_scsi_host_template = { | |
279 | .module = THIS_MODULE, | |
280 | .name = "zfcp", | |
281 | .queuecommand = zfcp_scsi_queuecommand, | |
282 | .eh_abort_handler = zfcp_scsi_eh_abort_handler, | |
283 | .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, | |
284 | .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, | |
285 | .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, | |
286 | .slave_alloc = zfcp_scsi_slave_alloc, | |
287 | .slave_configure = zfcp_scsi_slave_configure, | |
288 | .slave_destroy = zfcp_scsi_slave_destroy, | |
db5ed4df | 289 | .change_queue_depth = scsi_change_queue_depth, |
1947c72a CS |
290 | .proc_name = "zfcp", |
291 | .can_queue = 4096, | |
292 | .this_id = -1, | |
5fea4291 SM |
293 | .sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1) |
294 | * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2), | |
295 | /* GCD, adjusted later */ | |
296 | .max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1) | |
297 | * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8, | |
298 | /* GCD, adjusted later */ | |
1947c72a | 299 | .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, |
1947c72a CS |
300 | .use_clustering = 1, |
301 | .shost_attrs = zfcp_sysfs_shost_attrs, | |
302 | .sdev_attrs = zfcp_sysfs_sdev_attrs, | |
c40ecc12 | 303 | .track_queue_depth = 1, |
1947c72a CS |
304 | }; |
305 | ||
306 | /** | |
307 | * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer | |
308 | * @adapter: The zfcp adapter to register with the SCSI midlayer | |
309 | */ | |
310 | int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter) | |
1da177e4 | 311 | { |
f76af7d7 | 312 | struct ccw_dev_id dev_id; |
1da177e4 | 313 | |
9f28745a | 314 | if (adapter->scsi_host) |
f76af7d7 | 315 | return 0; |
9f28745a | 316 | |
f76af7d7 | 317 | ccw_device_get_id(adapter->ccw_device, &dev_id); |
1da177e4 | 318 | /* register adapter as SCSI host with mid layer of SCSI stack */ |
1947c72a | 319 | adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template, |
1da177e4 LT |
320 | sizeof (struct zfcp_adapter *)); |
321 | if (!adapter->scsi_host) { | |
553448f6 | 322 | dev_err(&adapter->ccw_device->dev, |
ff3b24fa CS |
323 | "Registering the FCP device with the " |
324 | "SCSI stack failed\n"); | |
f76af7d7 | 325 | return -EIO; |
1da177e4 | 326 | } |
1da177e4 LT |
327 | |
328 | /* tell the SCSI stack some characteristics of this adapter */ | |
f8210e34 CS |
329 | adapter->scsi_host->max_id = 511; |
330 | adapter->scsi_host->max_lun = 0xFFFFFFFF; | |
1da177e4 | 331 | adapter->scsi_host->max_channel = 0; |
f76af7d7 | 332 | adapter->scsi_host->unique_id = dev_id.devno; |
4318e08c | 333 | adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ |
1947c72a | 334 | adapter->scsi_host->transportt = zfcp_scsi_transport_template; |
1da177e4 | 335 | |
1da177e4 LT |
336 | adapter->scsi_host->hostdata[0] = (unsigned long) adapter; |
337 | ||
338 | if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { | |
339 | scsi_host_put(adapter->scsi_host); | |
f76af7d7 | 340 | return -EIO; |
1da177e4 | 341 | } |
f76af7d7 MP |
342 | |
343 | return 0; | |
1da177e4 LT |
344 | } |
345 | ||
1947c72a CS |
346 | /** |
347 | * zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer | |
348 | * @adapter: The zfcp adapter to unregister. | |
349 | */ | |
350 | void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter) | |
1da177e4 LT |
351 | { |
352 | struct Scsi_Host *shost; | |
13e1e1f0 | 353 | struct zfcp_port *port; |
1da177e4 LT |
354 | |
355 | shost = adapter->scsi_host; | |
356 | if (!shost) | |
357 | return; | |
f76af7d7 | 358 | |
ecf0c772 SS |
359 | read_lock_irq(&adapter->port_list_lock); |
360 | list_for_each_entry(port, &adapter->port_list, list) | |
f3450c7b | 361 | port->rport = NULL; |
ecf0c772 | 362 | read_unlock_irq(&adapter->port_list_lock); |
f76af7d7 | 363 | |
3859f6a2 | 364 | fc_remove_host(shost); |
1da177e4 LT |
365 | scsi_remove_host(shost); |
366 | scsi_host_put(shost); | |
367 | adapter->scsi_host = NULL; | |
1da177e4 LT |
368 | } |
369 | ||
f6cd94b1 AH |
370 | static struct fc_host_statistics* |
371 | zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) | |
1da177e4 | 372 | { |
f6cd94b1 | 373 | struct fc_host_statistics *fc_stats; |
1da177e4 | 374 | |
f6cd94b1 AH |
375 | if (!adapter->fc_stats) { |
376 | fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); | |
377 | if (!fc_stats) | |
378 | return NULL; | |
f3450c7b | 379 | adapter->fc_stats = fc_stats; /* freed in adapter_release */ |
f6cd94b1 AH |
380 | } |
381 | memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); | |
382 | return adapter->fc_stats; | |
1da177e4 LT |
383 | } |
384 | ||
f76af7d7 MP |
385 | static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, |
386 | struct fsf_qtcb_bottom_port *data, | |
387 | struct fsf_qtcb_bottom_port *old) | |
1da177e4 | 388 | { |
f76af7d7 MP |
389 | fc_stats->seconds_since_last_reset = |
390 | data->seconds_since_last_reset - old->seconds_since_last_reset; | |
f6cd94b1 AH |
391 | fc_stats->tx_frames = data->tx_frames - old->tx_frames; |
392 | fc_stats->tx_words = data->tx_words - old->tx_words; | |
393 | fc_stats->rx_frames = data->rx_frames - old->rx_frames; | |
394 | fc_stats->rx_words = data->rx_words - old->rx_words; | |
395 | fc_stats->lip_count = data->lip - old->lip; | |
396 | fc_stats->nos_count = data->nos - old->nos; | |
397 | fc_stats->error_frames = data->error_frames - old->error_frames; | |
398 | fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; | |
399 | fc_stats->link_failure_count = data->link_failure - old->link_failure; | |
400 | fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; | |
f76af7d7 MP |
401 | fc_stats->loss_of_signal_count = |
402 | data->loss_of_signal - old->loss_of_signal; | |
403 | fc_stats->prim_seq_protocol_err_count = | |
404 | data->psp_error_counts - old->psp_error_counts; | |
405 | fc_stats->invalid_tx_word_count = | |
406 | data->invalid_tx_words - old->invalid_tx_words; | |
f6cd94b1 | 407 | fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; |
f76af7d7 MP |
408 | fc_stats->fcp_input_requests = |
409 | data->input_requests - old->input_requests; | |
410 | fc_stats->fcp_output_requests = | |
411 | data->output_requests - old->output_requests; | |
412 | fc_stats->fcp_control_requests = | |
413 | data->control_requests - old->control_requests; | |
f6cd94b1 AH |
414 | fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; |
415 | fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; | |
416 | } | |
1da177e4 | 417 | |
f76af7d7 MP |
418 | static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, |
419 | struct fsf_qtcb_bottom_port *data) | |
f6cd94b1 AH |
420 | { |
421 | fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; | |
422 | fc_stats->tx_frames = data->tx_frames; | |
423 | fc_stats->tx_words = data->tx_words; | |
424 | fc_stats->rx_frames = data->rx_frames; | |
425 | fc_stats->rx_words = data->rx_words; | |
426 | fc_stats->lip_count = data->lip; | |
427 | fc_stats->nos_count = data->nos; | |
428 | fc_stats->error_frames = data->error_frames; | |
429 | fc_stats->dumped_frames = data->dumped_frames; | |
430 | fc_stats->link_failure_count = data->link_failure; | |
431 | fc_stats->loss_of_sync_count = data->loss_of_sync; | |
432 | fc_stats->loss_of_signal_count = data->loss_of_signal; | |
433 | fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; | |
434 | fc_stats->invalid_tx_word_count = data->invalid_tx_words; | |
435 | fc_stats->invalid_crc_count = data->invalid_crcs; | |
436 | fc_stats->fcp_input_requests = data->input_requests; | |
437 | fc_stats->fcp_output_requests = data->output_requests; | |
438 | fc_stats->fcp_control_requests = data->control_requests; | |
439 | fc_stats->fcp_input_megabytes = data->input_mb; | |
440 | fc_stats->fcp_output_megabytes = data->output_mb; | |
441 | } | |
442 | ||
f76af7d7 | 443 | static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) |
f6cd94b1 AH |
444 | { |
445 | struct zfcp_adapter *adapter; | |
446 | struct fc_host_statistics *fc_stats; | |
447 | struct fsf_qtcb_bottom_port *data; | |
448 | int ret; | |
449 | ||
f76af7d7 | 450 | adapter = (struct zfcp_adapter *)host->hostdata[0]; |
f6cd94b1 AH |
451 | fc_stats = zfcp_init_fc_host_stats(adapter); |
452 | if (!fc_stats) | |
453 | return NULL; | |
454 | ||
ec4081c6 | 455 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
456 | if (!data) |
457 | return NULL; | |
f6cd94b1 | 458 | |
564e1c86 | 459 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f6cd94b1 AH |
460 | if (ret) { |
461 | kfree(data); | |
f76af7d7 | 462 | return NULL; |
f6cd94b1 AH |
463 | } |
464 | ||
465 | if (adapter->stats_reset && | |
466 | ((jiffies/HZ - adapter->stats_reset) < | |
f76af7d7 | 467 | data->seconds_since_last_reset)) |
f6cd94b1 AH |
468 | zfcp_adjust_fc_host_stats(fc_stats, data, |
469 | adapter->stats_reset_data); | |
f76af7d7 | 470 | else |
f6cd94b1 AH |
471 | zfcp_set_fc_host_stats(fc_stats, data); |
472 | ||
473 | kfree(data); | |
474 | return fc_stats; | |
1da177e4 LT |
475 | } |
476 | ||
f76af7d7 | 477 | static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) |
1da177e4 | 478 | { |
f6cd94b1 | 479 | struct zfcp_adapter *adapter; |
f76af7d7 | 480 | struct fsf_qtcb_bottom_port *data; |
f6cd94b1 | 481 | int ret; |
1da177e4 | 482 | |
f6cd94b1 | 483 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; |
ec4081c6 | 484 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
485 | if (!data) |
486 | return; | |
f6cd94b1 | 487 | |
564e1c86 | 488 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f76af7d7 | 489 | if (ret) |
83f6d6d7 | 490 | kfree(data); |
f76af7d7 | 491 | else { |
f6cd94b1 | 492 | adapter->stats_reset = jiffies/HZ; |
f76af7d7 | 493 | kfree(adapter->stats_reset_data); |
f6cd94b1 | 494 | adapter->stats_reset_data = data; /* finally freed in |
f3450c7b | 495 | adapter_release */ |
f6cd94b1 | 496 | } |
1da177e4 LT |
497 | } |
498 | ||
85a82392 SS |
499 | static void zfcp_get_host_port_state(struct Scsi_Host *shost) |
500 | { | |
501 | struct zfcp_adapter *adapter = | |
502 | (struct zfcp_adapter *)shost->hostdata[0]; | |
503 | int status = atomic_read(&adapter->status); | |
504 | ||
505 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && | |
506 | !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) | |
507 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
508 | else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) | |
509 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
510 | else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
511 | fc_host_port_state(shost) = FC_PORTSTATE_ERROR; | |
512 | else | |
513 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
514 | } | |
515 | ||
338151e0 AH |
516 | static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
517 | { | |
518 | rport->dev_loss_tmo = timeout; | |
519 | } | |
520 | ||
a2fa0aed CS |
521 | /** |
522 | * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport | |
523 | * @rport: The FC rport where to teminate I/O | |
524 | * | |
525 | * Abort all pending SCSI commands for a port by closing the | |
835dc298 CS |
526 | * port. Using a reopen avoids a conflict with a shutdown |
527 | * overwriting a reopen. The "forced" ensures that a disappeared port | |
528 | * is not opened again as valid due to the cached plogi data in | |
529 | * non-NPIV mode. | |
a2fa0aed CS |
530 | */ |
531 | static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) | |
532 | { | |
70932935 | 533 | struct zfcp_port *port; |
ea945ff8 SS |
534 | struct Scsi_Host *shost = rport_to_shost(rport); |
535 | struct zfcp_adapter *adapter = | |
536 | (struct zfcp_adapter *)shost->hostdata[0]; | |
70932935 | 537 | |
ea945ff8 | 538 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
a2fa0aed | 539 | |
70932935 | 540 | if (port) { |
ea4a3a6a | 541 | zfcp_erp_port_forced_reopen(port, 0, "sctrpi1"); |
615f59e0 | 542 | put_device(&port->dev); |
70932935 | 543 | } |
a2fa0aed CS |
544 | } |
545 | ||
546 | static void zfcp_scsi_rport_register(struct zfcp_port *port) | |
547 | { | |
548 | struct fc_rport_identifiers ids; | |
549 | struct fc_rport *rport; | |
550 | ||
379d6bf6 CS |
551 | if (port->rport) |
552 | return; | |
553 | ||
a2fa0aed CS |
554 | ids.node_name = port->wwnn; |
555 | ids.port_name = port->wwpn; | |
556 | ids.port_id = port->d_id; | |
557 | ids.roles = FC_RPORT_ROLE_FCP_TARGET; | |
558 | ||
559 | rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); | |
560 | if (!rport) { | |
561 | dev_err(&port->adapter->ccw_device->dev, | |
562 | "Registering port 0x%016Lx failed\n", | |
563 | (unsigned long long)port->wwpn); | |
564 | return; | |
565 | } | |
566 | ||
a2fa0aed CS |
567 | rport->maxframe_size = port->maxframe_size; |
568 | rport->supported_classes = port->supported_classes; | |
569 | port->rport = rport; | |
1bf3ff02 | 570 | port->starget_id = rport->scsi_target_id; |
5a7de559 | 571 | |
1daa4eb5 | 572 | zfcp_unit_queue_scsi_scan(port); |
a2fa0aed CS |
573 | } |
574 | ||
575 | static void zfcp_scsi_rport_block(struct zfcp_port *port) | |
576 | { | |
70932935 CS |
577 | struct fc_rport *rport = port->rport; |
578 | ||
379d6bf6 | 579 | if (rport) { |
70932935 | 580 | fc_remote_port_delete(rport); |
379d6bf6 CS |
581 | port->rport = NULL; |
582 | } | |
a2fa0aed CS |
583 | } |
584 | ||
585 | void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) | |
586 | { | |
615f59e0 | 587 | get_device(&port->dev); |
a2fa0aed CS |
588 | port->rport_task = RPORT_ADD; |
589 | ||
4544683a | 590 | if (!queue_work(port->adapter->work_queue, &port->rport_work)) |
615f59e0 | 591 | put_device(&port->dev); |
a2fa0aed CS |
592 | } |
593 | ||
594 | void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) | |
595 | { | |
615f59e0 | 596 | get_device(&port->dev); |
a2fa0aed CS |
597 | port->rport_task = RPORT_DEL; |
598 | ||
4544683a SS |
599 | if (port->rport && queue_work(port->adapter->work_queue, |
600 | &port->rport_work)) | |
a67417ab SS |
601 | return; |
602 | ||
615f59e0 | 603 | put_device(&port->dev); |
a2fa0aed CS |
604 | } |
605 | ||
606 | void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) | |
607 | { | |
ecf0c772 | 608 | unsigned long flags; |
a2fa0aed CS |
609 | struct zfcp_port *port; |
610 | ||
ecf0c772 SS |
611 | read_lock_irqsave(&adapter->port_list_lock, flags); |
612 | list_for_each_entry(port, &adapter->port_list, list) | |
a2fa0aed | 613 | zfcp_scsi_schedule_rport_block(port); |
ecf0c772 | 614 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
a2fa0aed CS |
615 | } |
616 | ||
617 | void zfcp_scsi_rport_work(struct work_struct *work) | |
618 | { | |
619 | struct zfcp_port *port = container_of(work, struct zfcp_port, | |
620 | rport_work); | |
621 | ||
622 | while (port->rport_task) { | |
623 | if (port->rport_task == RPORT_ADD) { | |
624 | port->rport_task = RPORT_NONE; | |
625 | zfcp_scsi_rport_register(port); | |
626 | } else { | |
627 | port->rport_task = RPORT_NONE; | |
628 | zfcp_scsi_rport_block(port); | |
629 | } | |
630 | } | |
631 | ||
615f59e0 | 632 | put_device(&port->dev); |
a2fa0aed CS |
633 | } |
634 | ||
ef3eb71d FB |
635 | /** |
636 | * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host | |
637 | * @adapter: The adapter where to configure DIF/DIX for the SCSI host | |
638 | */ | |
639 | void zfcp_scsi_set_prot(struct zfcp_adapter *adapter) | |
640 | { | |
641 | unsigned int mask = 0; | |
642 | unsigned int data_div; | |
643 | struct Scsi_Host *shost = adapter->scsi_host; | |
644 | ||
645 | data_div = atomic_read(&adapter->status) & | |
646 | ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED; | |
647 | ||
648 | if (enable_dif && | |
649 | adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1) | |
650 | mask |= SHOST_DIF_TYPE1_PROTECTION; | |
651 | ||
652 | if (enable_dif && data_div && | |
653 | adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) { | |
654 | mask |= SHOST_DIX_TYPE1_PROTECTION; | |
655 | scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP); | |
86a9668a SS |
656 | shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2; |
657 | shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2; | |
658 | shost->max_sectors = shost->sg_tablesize * 8; | |
ef3eb71d FB |
659 | } |
660 | ||
661 | scsi_host_set_prot(shost, mask); | |
662 | } | |
663 | ||
664 | /** | |
665 | * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error | |
666 | * @scmd: The SCSI command to report the error for | |
667 | * @ascq: The ASCQ to put in the sense buffer | |
668 | * | |
669 | * See the error handling in sd_done for the sense codes used here. | |
670 | * Set DID_SOFT_ERROR to retry the request, if possible. | |
671 | */ | |
672 | void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq) | |
673 | { | |
674 | scsi_build_sense_buffer(1, scmd->sense_buffer, | |
675 | ILLEGAL_REQUEST, 0x10, ascq); | |
676 | set_driver_byte(scmd, DRIVER_SENSE); | |
677 | scmd->result |= SAM_STAT_CHECK_CONDITION; | |
678 | set_host_byte(scmd, DID_SOFT_ERROR); | |
679 | } | |
680 | ||
1da177e4 | 681 | struct fc_function_template zfcp_transport_functions = { |
1da177e4 LT |
682 | .show_starget_port_id = 1, |
683 | .show_starget_port_name = 1, | |
684 | .show_starget_node_name = 1, | |
3859f6a2 | 685 | .show_rport_supported_classes = 1, |
75bfc283 | 686 | .show_rport_maxframe_size = 1, |
338151e0 | 687 | .show_rport_dev_loss_tmo = 1, |
3859f6a2 AH |
688 | .show_host_node_name = 1, |
689 | .show_host_port_name = 1, | |
ad757cdf | 690 | .show_host_permanent_port_name = 1, |
3859f6a2 | 691 | .show_host_supported_classes = 1, |
0fdd2133 | 692 | .show_host_supported_fc4s = 1, |
ad757cdf | 693 | .show_host_supported_speeds = 1, |
13e1e1f0 | 694 | .show_host_maxframe_size = 1, |
3859f6a2 | 695 | .show_host_serial_number = 1, |
f6cd94b1 AH |
696 | .get_fc_host_stats = zfcp_get_fc_host_stats, |
697 | .reset_fc_host_stats = zfcp_reset_fc_host_stats, | |
338151e0 | 698 | .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, |
85a82392 | 699 | .get_host_port_state = zfcp_get_host_port_state, |
a2fa0aed | 700 | .terminate_rport_io = zfcp_scsi_terminate_rport_io, |
85a82392 | 701 | .show_host_port_state = 1, |
0fdd2133 | 702 | .show_host_active_fc4s = 1, |
7c7dc196 | 703 | .bsg_request = zfcp_fc_exec_bsg_job, |
491ca442 | 704 | .bsg_timeout = zfcp_fc_timeout_bsg_job, |
f6cd94b1 AH |
705 | /* no functions registered for following dynamic attributes but |
706 | directly set by LLDD */ | |
ad757cdf | 707 | .show_host_port_type = 1, |
038d9446 | 708 | .show_host_symbolic_name = 1, |
13e1e1f0 AH |
709 | .show_host_speed = 1, |
710 | .show_host_port_id = 1, | |
7c7dc196 | 711 | .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), |
1da177e4 | 712 | }; |