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> |
60063497 | 16 | #include <linux/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 | ||
0d81b4e8 CS |
33 | static bool allow_lun_scan = 1; |
34 | module_param(allow_lun_scan, bool, 0600); | |
35 | MODULE_PARM_DESC(allow_lun_scan, "For NPIV, scan and attach all storage LUNs"); | |
36 | ||
e881a172 MC |
37 | static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth, |
38 | int reason) | |
a40a1baf | 39 | { |
42e62a74 CS |
40 | switch (reason) { |
41 | case SCSI_QDEPTH_DEFAULT: | |
42 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
43 | break; | |
44 | case SCSI_QDEPTH_QFULL: | |
45 | scsi_track_queue_full(sdev, depth); | |
46 | break; | |
47 | case SCSI_QDEPTH_RAMP_UP: | |
48 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
49 | break; | |
50 | default: | |
e881a172 | 51 | return -EOPNOTSUPP; |
42e62a74 | 52 | } |
a40a1baf CS |
53 | return sdev->queue_depth; |
54 | } | |
55 | ||
b62a8d9b | 56 | static void zfcp_scsi_slave_destroy(struct scsi_device *sdev) |
1da177e4 | 57 | { |
b62a8d9b CS |
58 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
59 | ||
60 | zfcp_erp_lun_shutdown_wait(sdev, "scssd_1"); | |
61 | put_device(&zfcp_sdev->port->dev); | |
1da177e4 LT |
62 | } |
63 | ||
f76af7d7 | 64 | static int zfcp_scsi_slave_configure(struct scsi_device *sdp) |
1da177e4 LT |
65 | { |
66 | if (sdp->tagged_supported) | |
a40a1baf | 67 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth); |
1da177e4 LT |
68 | else |
69 | scsi_adjust_queue_depth(sdp, 0, 1); | |
70 | return 0; | |
71 | } | |
72 | ||
f76af7d7 | 73 | static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) |
1da177e4 | 74 | { |
feac6a07 | 75 | set_host_byte(scpnt, result); |
250a1352 | 76 | zfcp_dbf_scsi_fail_send(scpnt); |
1da177e4 LT |
77 | scpnt->scsi_done(scpnt); |
78 | } | |
79 | ||
e55f8753 CS |
80 | static |
81 | int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt) | |
1da177e4 | 82 | { |
b62a8d9b | 83 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
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; | |
1da177e4 | 90 | |
a2fa0aed CS |
91 | scsi_result = fc_remote_port_chkready(rport); |
92 | if (unlikely(scsi_result)) { | |
93 | scpnt->result = scsi_result; | |
250a1352 | 94 | zfcp_dbf_scsi_fail_send(scpnt); |
a2fa0aed CS |
95 | scpnt->scsi_done(scpnt); |
96 | return 0; | |
97 | } | |
98 | ||
b62a8d9b | 99 | status = atomic_read(&zfcp_sdev->status); |
8830271c | 100 | if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) && |
b62a8d9b | 101 | !(atomic_read(&zfcp_sdev->port->status) & |
8830271c | 102 | ZFCP_STATUS_COMMON_ERP_FAILED)) { |
b62a8d9b | 103 | /* only LUN access denied, but port is good |
8830271c | 104 | * not covered by FC transport, have to fail here */ |
f76af7d7 | 105 | zfcp_scsi_command_fail(scpnt, DID_ERROR); |
a419aef8 | 106 | return 0; |
f76af7d7 MP |
107 | } |
108 | ||
8830271c CS |
109 | if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { |
110 | /* This could be either | |
b62a8d9b CS |
111 | * open LUN pending: this is temporary, will result in |
112 | * open LUN or ERP_FAILED, so retry command | |
8830271c CS |
113 | * call to rport_delete pending: mimic retry from |
114 | * fc_remote_port_chkready until rport is BLOCKED | |
115 | */ | |
116 | zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY); | |
117 | return 0; | |
118 | } | |
119 | ||
b62a8d9b | 120 | ret = zfcp_fsf_fcp_cmnd(scpnt); |
f76af7d7 | 121 | if (unlikely(ret == -EBUSY)) |
f7a65e92 | 122 | return SCSI_MLQUEUE_DEVICE_BUSY; |
f76af7d7 MP |
123 | else if (unlikely(ret < 0)) |
124 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 125 | |
f76af7d7 | 126 | return ret; |
1da177e4 LT |
127 | } |
128 | ||
b62a8d9b | 129 | static int zfcp_scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 130 | { |
b62a8d9b CS |
131 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
132 | struct zfcp_adapter *adapter = | |
133 | (struct zfcp_adapter *) sdev->host->hostdata[0]; | |
134 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); | |
1da177e4 | 135 | struct zfcp_port *port; |
f76af7d7 | 136 | struct zfcp_unit *unit; |
0d81b4e8 | 137 | int npiv = adapter->connection_features & FSF_FEATURE_NPIV_MODE; |
1da177e4 | 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); | |
f76af7d7 | 146 | |
0d81b4e8 | 147 | if (!unit && !(allow_lun_scan && npiv)) { |
b62a8d9b CS |
148 | put_device(&port->dev); |
149 | return -ENXIO; | |
f76af7d7 | 150 | } |
f76af7d7 | 151 | |
b62a8d9b CS |
152 | zfcp_sdev->port = port; |
153 | zfcp_sdev->latencies.write.channel.min = 0xFFFFFFFF; | |
154 | zfcp_sdev->latencies.write.fabric.min = 0xFFFFFFFF; | |
155 | zfcp_sdev->latencies.read.channel.min = 0xFFFFFFFF; | |
156 | zfcp_sdev->latencies.read.fabric.min = 0xFFFFFFFF; | |
157 | zfcp_sdev->latencies.cmd.channel.min = 0xFFFFFFFF; | |
158 | zfcp_sdev->latencies.cmd.fabric.min = 0xFFFFFFFF; | |
159 | spin_lock_init(&zfcp_sdev->latencies.lock); | |
f76af7d7 | 160 | |
edaed859 | 161 | zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING); |
ea4a3a6a | 162 | zfcp_erp_lun_reopen(sdev, 0, "scsla_1"); |
b62a8d9b CS |
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); |
250a1352 | 186 | zfcp_dbf_scsi_abort("abrt_or", scpnt, NULL); |
c6936e7f | 187 | return FAILED; /* completion could be in progress */ |
1da177e4 | 188 | } |
63caf367 | 189 | old_req->data = NULL; |
1da177e4 | 190 | |
4eff4a36 | 191 | /* don't access old fsf_req after releasing the abort_lock */ |
1da177e4 | 192 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
4eff4a36 | 193 | |
63caf367 | 194 | while (retry--) { |
b62a8d9b | 195 | abrt_req = zfcp_fsf_abort_fcp_cmnd(scpnt); |
63caf367 CS |
196 | if (abrt_req) |
197 | break; | |
198 | ||
199 | zfcp_erp_wait(adapter); | |
a1dbfddd | 200 | ret = fc_block_scsi_eh(scpnt); |
250a1352 SS |
201 | if (ret) { |
202 | zfcp_dbf_scsi_abort("abrt_bl", scpnt, NULL); | |
a1dbfddd | 203 | return ret; |
250a1352 | 204 | } |
63caf367 CS |
205 | if (!(atomic_read(&adapter->status) & |
206 | ZFCP_STATUS_COMMON_RUNNING)) { | |
250a1352 | 207 | zfcp_dbf_scsi_abort("abrt_ru", scpnt, NULL); |
63caf367 CS |
208 | return SUCCESS; |
209 | } | |
1da177e4 | 210 | } |
250a1352 SS |
211 | if (!abrt_req) { |
212 | zfcp_dbf_scsi_abort("abrt_ar", scpnt, NULL); | |
63caf367 | 213 | return FAILED; |
250a1352 | 214 | } |
1da177e4 | 215 | |
058b8647 | 216 | wait_for_completion(&abrt_req->completion); |
059c97d0 | 217 | |
63caf367 | 218 | if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) |
250a1352 | 219 | dbf_tag = "abrt_ok"; |
63caf367 | 220 | else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) |
250a1352 | 221 | dbf_tag = "abrt_nn"; |
63caf367 | 222 | else { |
250a1352 | 223 | dbf_tag = "abrt_fa"; |
1da177e4 | 224 | retval = FAILED; |
1da177e4 | 225 | } |
250a1352 | 226 | zfcp_dbf_scsi_abort(dbf_tag, scpnt, abrt_req); |
63caf367 | 227 | zfcp_fsf_req_free(abrt_req); |
f76af7d7 | 228 | return retval; |
1da177e4 LT |
229 | } |
230 | ||
63caf367 | 231 | static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) |
1da177e4 | 232 | { |
b62a8d9b CS |
233 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
234 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
564e1c86 | 235 | struct zfcp_fsf_req *fsf_req = NULL; |
a1dbfddd | 236 | int retval = SUCCESS, ret; |
63caf367 CS |
237 | int retry = 3; |
238 | ||
239 | while (retry--) { | |
b62a8d9b | 240 | fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags); |
63caf367 CS |
241 | if (fsf_req) |
242 | break; | |
243 | ||
244 | zfcp_erp_wait(adapter); | |
a1dbfddd CS |
245 | ret = fc_block_scsi_eh(scpnt); |
246 | if (ret) | |
247 | return ret; | |
248 | ||
63caf367 CS |
249 | if (!(atomic_read(&adapter->status) & |
250 | ZFCP_STATUS_COMMON_RUNNING)) { | |
b62a8d9b | 251 | zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags); |
63caf367 CS |
252 | return SUCCESS; |
253 | } | |
1da177e4 | 254 | } |
63caf367 CS |
255 | if (!fsf_req) |
256 | return FAILED; | |
1da177e4 | 257 | |
058b8647 | 258 | wait_for_completion(&fsf_req->completion); |
77eb1699 | 259 | |
8a36e453 | 260 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { |
b62a8d9b | 261 | zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags); |
f76af7d7 | 262 | retval = FAILED; |
8a36e453 | 263 | } else |
b62a8d9b | 264 | zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags); |
77eb1699 AH |
265 | |
266 | zfcp_fsf_req_free(fsf_req); | |
1da177e4 LT |
267 | return retval; |
268 | } | |
269 | ||
f76af7d7 MP |
270 | static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) |
271 | { | |
4318e08c | 272 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); |
f76af7d7 MP |
273 | } |
274 | ||
275 | static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) | |
276 | { | |
4318e08c | 277 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); |
f76af7d7 MP |
278 | } |
279 | ||
2b67fc46 | 280 | static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 281 | { |
b62a8d9b CS |
282 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
283 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
a1dbfddd | 284 | int ret; |
1da177e4 | 285 | |
ea4a3a6a | 286 | zfcp_erp_adapter_reopen(adapter, 0, "schrh_1"); |
81654286 | 287 | zfcp_erp_wait(adapter); |
a1dbfddd CS |
288 | ret = fc_block_scsi_eh(scpnt); |
289 | if (ret) | |
290 | return ret; | |
1da177e4 | 291 | |
810f1e3e | 292 | return SUCCESS; |
1da177e4 LT |
293 | } |
294 | ||
1947c72a CS |
295 | struct scsi_transport_template *zfcp_scsi_transport_template; |
296 | ||
297 | static struct scsi_host_template zfcp_scsi_host_template = { | |
298 | .module = THIS_MODULE, | |
299 | .name = "zfcp", | |
300 | .queuecommand = zfcp_scsi_queuecommand, | |
301 | .eh_abort_handler = zfcp_scsi_eh_abort_handler, | |
302 | .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, | |
303 | .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, | |
304 | .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, | |
305 | .slave_alloc = zfcp_scsi_slave_alloc, | |
306 | .slave_configure = zfcp_scsi_slave_configure, | |
307 | .slave_destroy = zfcp_scsi_slave_destroy, | |
308 | .change_queue_depth = zfcp_scsi_change_queue_depth, | |
309 | .proc_name = "zfcp", | |
310 | .can_queue = 4096, | |
311 | .this_id = -1, | |
312 | .sg_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ, | |
313 | .max_sectors = (ZFCP_QDIO_MAX_SBALES_PER_REQ * 8), | |
314 | .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, | |
315 | .cmd_per_lun = 1, | |
316 | .use_clustering = 1, | |
317 | .shost_attrs = zfcp_sysfs_shost_attrs, | |
318 | .sdev_attrs = zfcp_sysfs_sdev_attrs, | |
319 | }; | |
320 | ||
321 | /** | |
322 | * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer | |
323 | * @adapter: The zfcp adapter to register with the SCSI midlayer | |
324 | */ | |
325 | int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter) | |
1da177e4 | 326 | { |
f76af7d7 | 327 | struct ccw_dev_id dev_id; |
1da177e4 | 328 | |
9f28745a | 329 | if (adapter->scsi_host) |
f76af7d7 | 330 | return 0; |
9f28745a | 331 | |
f76af7d7 | 332 | ccw_device_get_id(adapter->ccw_device, &dev_id); |
1da177e4 | 333 | /* register adapter as SCSI host with mid layer of SCSI stack */ |
1947c72a | 334 | adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template, |
1da177e4 LT |
335 | sizeof (struct zfcp_adapter *)); |
336 | if (!adapter->scsi_host) { | |
553448f6 | 337 | dev_err(&adapter->ccw_device->dev, |
ff3b24fa CS |
338 | "Registering the FCP device with the " |
339 | "SCSI stack failed\n"); | |
f76af7d7 | 340 | return -EIO; |
1da177e4 | 341 | } |
1da177e4 LT |
342 | |
343 | /* tell the SCSI stack some characteristics of this adapter */ | |
f8210e34 CS |
344 | adapter->scsi_host->max_id = 511; |
345 | adapter->scsi_host->max_lun = 0xFFFFFFFF; | |
1da177e4 | 346 | adapter->scsi_host->max_channel = 0; |
f76af7d7 | 347 | adapter->scsi_host->unique_id = dev_id.devno; |
4318e08c | 348 | adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ |
1947c72a | 349 | adapter->scsi_host->transportt = zfcp_scsi_transport_template; |
1da177e4 | 350 | |
1da177e4 LT |
351 | adapter->scsi_host->hostdata[0] = (unsigned long) adapter; |
352 | ||
353 | if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { | |
354 | scsi_host_put(adapter->scsi_host); | |
f76af7d7 | 355 | return -EIO; |
1da177e4 | 356 | } |
f76af7d7 MP |
357 | |
358 | return 0; | |
1da177e4 LT |
359 | } |
360 | ||
1947c72a CS |
361 | /** |
362 | * zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer | |
363 | * @adapter: The zfcp adapter to unregister. | |
364 | */ | |
365 | void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter) | |
1da177e4 LT |
366 | { |
367 | struct Scsi_Host *shost; | |
13e1e1f0 | 368 | struct zfcp_port *port; |
1da177e4 LT |
369 | |
370 | shost = adapter->scsi_host; | |
371 | if (!shost) | |
372 | return; | |
f76af7d7 | 373 | |
ecf0c772 SS |
374 | read_lock_irq(&adapter->port_list_lock); |
375 | list_for_each_entry(port, &adapter->port_list, list) | |
f3450c7b | 376 | port->rport = NULL; |
ecf0c772 | 377 | read_unlock_irq(&adapter->port_list_lock); |
f76af7d7 | 378 | |
3859f6a2 | 379 | fc_remove_host(shost); |
1da177e4 LT |
380 | scsi_remove_host(shost); |
381 | scsi_host_put(shost); | |
382 | adapter->scsi_host = NULL; | |
1da177e4 LT |
383 | } |
384 | ||
f6cd94b1 AH |
385 | static struct fc_host_statistics* |
386 | zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) | |
1da177e4 | 387 | { |
f6cd94b1 | 388 | struct fc_host_statistics *fc_stats; |
1da177e4 | 389 | |
f6cd94b1 AH |
390 | if (!adapter->fc_stats) { |
391 | fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); | |
392 | if (!fc_stats) | |
393 | return NULL; | |
f3450c7b | 394 | adapter->fc_stats = fc_stats; /* freed in adapter_release */ |
f6cd94b1 AH |
395 | } |
396 | memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); | |
397 | return adapter->fc_stats; | |
1da177e4 LT |
398 | } |
399 | ||
f76af7d7 MP |
400 | static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, |
401 | struct fsf_qtcb_bottom_port *data, | |
402 | struct fsf_qtcb_bottom_port *old) | |
1da177e4 | 403 | { |
f76af7d7 MP |
404 | fc_stats->seconds_since_last_reset = |
405 | data->seconds_since_last_reset - old->seconds_since_last_reset; | |
f6cd94b1 AH |
406 | fc_stats->tx_frames = data->tx_frames - old->tx_frames; |
407 | fc_stats->tx_words = data->tx_words - old->tx_words; | |
408 | fc_stats->rx_frames = data->rx_frames - old->rx_frames; | |
409 | fc_stats->rx_words = data->rx_words - old->rx_words; | |
410 | fc_stats->lip_count = data->lip - old->lip; | |
411 | fc_stats->nos_count = data->nos - old->nos; | |
412 | fc_stats->error_frames = data->error_frames - old->error_frames; | |
413 | fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; | |
414 | fc_stats->link_failure_count = data->link_failure - old->link_failure; | |
415 | fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; | |
f76af7d7 MP |
416 | fc_stats->loss_of_signal_count = |
417 | data->loss_of_signal - old->loss_of_signal; | |
418 | fc_stats->prim_seq_protocol_err_count = | |
419 | data->psp_error_counts - old->psp_error_counts; | |
420 | fc_stats->invalid_tx_word_count = | |
421 | data->invalid_tx_words - old->invalid_tx_words; | |
f6cd94b1 | 422 | fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; |
f76af7d7 MP |
423 | fc_stats->fcp_input_requests = |
424 | data->input_requests - old->input_requests; | |
425 | fc_stats->fcp_output_requests = | |
426 | data->output_requests - old->output_requests; | |
427 | fc_stats->fcp_control_requests = | |
428 | data->control_requests - old->control_requests; | |
f6cd94b1 AH |
429 | fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; |
430 | fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; | |
431 | } | |
1da177e4 | 432 | |
f76af7d7 MP |
433 | static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, |
434 | struct fsf_qtcb_bottom_port *data) | |
f6cd94b1 AH |
435 | { |
436 | fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; | |
437 | fc_stats->tx_frames = data->tx_frames; | |
438 | fc_stats->tx_words = data->tx_words; | |
439 | fc_stats->rx_frames = data->rx_frames; | |
440 | fc_stats->rx_words = data->rx_words; | |
441 | fc_stats->lip_count = data->lip; | |
442 | fc_stats->nos_count = data->nos; | |
443 | fc_stats->error_frames = data->error_frames; | |
444 | fc_stats->dumped_frames = data->dumped_frames; | |
445 | fc_stats->link_failure_count = data->link_failure; | |
446 | fc_stats->loss_of_sync_count = data->loss_of_sync; | |
447 | fc_stats->loss_of_signal_count = data->loss_of_signal; | |
448 | fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; | |
449 | fc_stats->invalid_tx_word_count = data->invalid_tx_words; | |
450 | fc_stats->invalid_crc_count = data->invalid_crcs; | |
451 | fc_stats->fcp_input_requests = data->input_requests; | |
452 | fc_stats->fcp_output_requests = data->output_requests; | |
453 | fc_stats->fcp_control_requests = data->control_requests; | |
454 | fc_stats->fcp_input_megabytes = data->input_mb; | |
455 | fc_stats->fcp_output_megabytes = data->output_mb; | |
456 | } | |
457 | ||
f76af7d7 | 458 | static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) |
f6cd94b1 AH |
459 | { |
460 | struct zfcp_adapter *adapter; | |
461 | struct fc_host_statistics *fc_stats; | |
462 | struct fsf_qtcb_bottom_port *data; | |
463 | int ret; | |
464 | ||
f76af7d7 | 465 | adapter = (struct zfcp_adapter *)host->hostdata[0]; |
f6cd94b1 AH |
466 | fc_stats = zfcp_init_fc_host_stats(adapter); |
467 | if (!fc_stats) | |
468 | return NULL; | |
469 | ||
ec4081c6 | 470 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
471 | if (!data) |
472 | return NULL; | |
f6cd94b1 | 473 | |
564e1c86 | 474 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f6cd94b1 AH |
475 | if (ret) { |
476 | kfree(data); | |
f76af7d7 | 477 | return NULL; |
f6cd94b1 AH |
478 | } |
479 | ||
480 | if (adapter->stats_reset && | |
481 | ((jiffies/HZ - adapter->stats_reset) < | |
f76af7d7 | 482 | data->seconds_since_last_reset)) |
f6cd94b1 AH |
483 | zfcp_adjust_fc_host_stats(fc_stats, data, |
484 | adapter->stats_reset_data); | |
f76af7d7 | 485 | else |
f6cd94b1 AH |
486 | zfcp_set_fc_host_stats(fc_stats, data); |
487 | ||
488 | kfree(data); | |
489 | return fc_stats; | |
1da177e4 LT |
490 | } |
491 | ||
f76af7d7 | 492 | static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) |
1da177e4 | 493 | { |
f6cd94b1 | 494 | struct zfcp_adapter *adapter; |
f76af7d7 | 495 | struct fsf_qtcb_bottom_port *data; |
f6cd94b1 | 496 | int ret; |
1da177e4 | 497 | |
f6cd94b1 | 498 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; |
ec4081c6 | 499 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
500 | if (!data) |
501 | return; | |
f6cd94b1 | 502 | |
564e1c86 | 503 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f76af7d7 | 504 | if (ret) |
83f6d6d7 | 505 | kfree(data); |
f76af7d7 | 506 | else { |
f6cd94b1 | 507 | adapter->stats_reset = jiffies/HZ; |
f76af7d7 | 508 | kfree(adapter->stats_reset_data); |
f6cd94b1 | 509 | adapter->stats_reset_data = data; /* finally freed in |
f3450c7b | 510 | adapter_release */ |
f6cd94b1 | 511 | } |
1da177e4 LT |
512 | } |
513 | ||
85a82392 SS |
514 | static void zfcp_get_host_port_state(struct Scsi_Host *shost) |
515 | { | |
516 | struct zfcp_adapter *adapter = | |
517 | (struct zfcp_adapter *)shost->hostdata[0]; | |
518 | int status = atomic_read(&adapter->status); | |
519 | ||
520 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && | |
521 | !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) | |
522 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
523 | else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) | |
524 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
525 | else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
526 | fc_host_port_state(shost) = FC_PORTSTATE_ERROR; | |
527 | else | |
528 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
529 | } | |
530 | ||
338151e0 AH |
531 | static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
532 | { | |
533 | rport->dev_loss_tmo = timeout; | |
534 | } | |
535 | ||
a2fa0aed CS |
536 | /** |
537 | * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport | |
538 | * @rport: The FC rport where to teminate I/O | |
539 | * | |
540 | * Abort all pending SCSI commands for a port by closing the | |
835dc298 CS |
541 | * port. Using a reopen avoids a conflict with a shutdown |
542 | * overwriting a reopen. The "forced" ensures that a disappeared port | |
543 | * is not opened again as valid due to the cached plogi data in | |
544 | * non-NPIV mode. | |
a2fa0aed CS |
545 | */ |
546 | static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) | |
547 | { | |
70932935 | 548 | struct zfcp_port *port; |
ea945ff8 SS |
549 | struct Scsi_Host *shost = rport_to_shost(rport); |
550 | struct zfcp_adapter *adapter = | |
551 | (struct zfcp_adapter *)shost->hostdata[0]; | |
70932935 | 552 | |
ea945ff8 | 553 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
a2fa0aed | 554 | |
70932935 | 555 | if (port) { |
ea4a3a6a | 556 | zfcp_erp_port_forced_reopen(port, 0, "sctrpi1"); |
615f59e0 | 557 | put_device(&port->dev); |
70932935 | 558 | } |
a2fa0aed CS |
559 | } |
560 | ||
561 | static void zfcp_scsi_rport_register(struct zfcp_port *port) | |
562 | { | |
563 | struct fc_rport_identifiers ids; | |
564 | struct fc_rport *rport; | |
565 | ||
379d6bf6 CS |
566 | if (port->rport) |
567 | return; | |
568 | ||
a2fa0aed CS |
569 | ids.node_name = port->wwnn; |
570 | ids.port_name = port->wwpn; | |
571 | ids.port_id = port->d_id; | |
572 | ids.roles = FC_RPORT_ROLE_FCP_TARGET; | |
573 | ||
574 | rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); | |
575 | if (!rport) { | |
576 | dev_err(&port->adapter->ccw_device->dev, | |
577 | "Registering port 0x%016Lx failed\n", | |
578 | (unsigned long long)port->wwpn); | |
579 | return; | |
580 | } | |
581 | ||
a2fa0aed CS |
582 | rport->maxframe_size = port->maxframe_size; |
583 | rport->supported_classes = port->supported_classes; | |
584 | port->rport = rport; | |
1bf3ff02 | 585 | port->starget_id = rport->scsi_target_id; |
5a7de559 | 586 | |
1daa4eb5 | 587 | zfcp_unit_queue_scsi_scan(port); |
a2fa0aed CS |
588 | } |
589 | ||
590 | static void zfcp_scsi_rport_block(struct zfcp_port *port) | |
591 | { | |
70932935 CS |
592 | struct fc_rport *rport = port->rport; |
593 | ||
379d6bf6 | 594 | if (rport) { |
70932935 | 595 | fc_remote_port_delete(rport); |
379d6bf6 CS |
596 | port->rport = NULL; |
597 | } | |
a2fa0aed CS |
598 | } |
599 | ||
600 | void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) | |
601 | { | |
615f59e0 | 602 | get_device(&port->dev); |
a2fa0aed CS |
603 | port->rport_task = RPORT_ADD; |
604 | ||
4544683a | 605 | if (!queue_work(port->adapter->work_queue, &port->rport_work)) |
615f59e0 | 606 | put_device(&port->dev); |
a2fa0aed CS |
607 | } |
608 | ||
609 | void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) | |
610 | { | |
615f59e0 | 611 | get_device(&port->dev); |
a2fa0aed CS |
612 | port->rport_task = RPORT_DEL; |
613 | ||
4544683a SS |
614 | if (port->rport && queue_work(port->adapter->work_queue, |
615 | &port->rport_work)) | |
a67417ab SS |
616 | return; |
617 | ||
615f59e0 | 618 | put_device(&port->dev); |
a2fa0aed CS |
619 | } |
620 | ||
621 | void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) | |
622 | { | |
ecf0c772 | 623 | unsigned long flags; |
a2fa0aed CS |
624 | struct zfcp_port *port; |
625 | ||
ecf0c772 SS |
626 | read_lock_irqsave(&adapter->port_list_lock, flags); |
627 | list_for_each_entry(port, &adapter->port_list, list) | |
a2fa0aed | 628 | zfcp_scsi_schedule_rport_block(port); |
ecf0c772 | 629 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
a2fa0aed CS |
630 | } |
631 | ||
632 | void zfcp_scsi_rport_work(struct work_struct *work) | |
633 | { | |
634 | struct zfcp_port *port = container_of(work, struct zfcp_port, | |
635 | rport_work); | |
636 | ||
637 | while (port->rport_task) { | |
638 | if (port->rport_task == RPORT_ADD) { | |
639 | port->rport_task = RPORT_NONE; | |
640 | zfcp_scsi_rport_register(port); | |
641 | } else { | |
642 | port->rport_task = RPORT_NONE; | |
643 | zfcp_scsi_rport_block(port); | |
644 | } | |
645 | } | |
646 | ||
615f59e0 | 647 | put_device(&port->dev); |
a2fa0aed CS |
648 | } |
649 | ||
ef3eb71d FB |
650 | /** |
651 | * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host | |
652 | * @adapter: The adapter where to configure DIF/DIX for the SCSI host | |
653 | */ | |
654 | void zfcp_scsi_set_prot(struct zfcp_adapter *adapter) | |
655 | { | |
656 | unsigned int mask = 0; | |
657 | unsigned int data_div; | |
658 | struct Scsi_Host *shost = adapter->scsi_host; | |
659 | ||
660 | data_div = atomic_read(&adapter->status) & | |
661 | ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED; | |
662 | ||
663 | if (enable_dif && | |
664 | adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1) | |
665 | mask |= SHOST_DIF_TYPE1_PROTECTION; | |
666 | ||
667 | if (enable_dif && data_div && | |
668 | adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) { | |
669 | mask |= SHOST_DIX_TYPE1_PROTECTION; | |
670 | scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP); | |
175b79f0 | 671 | shost->sg_prot_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ / 2; |
ef3eb71d FB |
672 | shost->sg_tablesize = ZFCP_QDIO_MAX_SBALES_PER_REQ / 2; |
673 | shost->max_sectors = ZFCP_QDIO_MAX_SBALES_PER_REQ * 8 / 2; | |
674 | } | |
675 | ||
676 | scsi_host_set_prot(shost, mask); | |
677 | } | |
678 | ||
679 | /** | |
680 | * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error | |
681 | * @scmd: The SCSI command to report the error for | |
682 | * @ascq: The ASCQ to put in the sense buffer | |
683 | * | |
684 | * See the error handling in sd_done for the sense codes used here. | |
685 | * Set DID_SOFT_ERROR to retry the request, if possible. | |
686 | */ | |
687 | void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq) | |
688 | { | |
689 | scsi_build_sense_buffer(1, scmd->sense_buffer, | |
690 | ILLEGAL_REQUEST, 0x10, ascq); | |
691 | set_driver_byte(scmd, DRIVER_SENSE); | |
692 | scmd->result |= SAM_STAT_CHECK_CONDITION; | |
693 | set_host_byte(scmd, DID_SOFT_ERROR); | |
694 | } | |
695 | ||
1da177e4 | 696 | struct fc_function_template zfcp_transport_functions = { |
1da177e4 LT |
697 | .show_starget_port_id = 1, |
698 | .show_starget_port_name = 1, | |
699 | .show_starget_node_name = 1, | |
3859f6a2 | 700 | .show_rport_supported_classes = 1, |
75bfc283 | 701 | .show_rport_maxframe_size = 1, |
338151e0 | 702 | .show_rport_dev_loss_tmo = 1, |
3859f6a2 AH |
703 | .show_host_node_name = 1, |
704 | .show_host_port_name = 1, | |
ad757cdf | 705 | .show_host_permanent_port_name = 1, |
3859f6a2 | 706 | .show_host_supported_classes = 1, |
0fdd2133 | 707 | .show_host_supported_fc4s = 1, |
ad757cdf | 708 | .show_host_supported_speeds = 1, |
13e1e1f0 | 709 | .show_host_maxframe_size = 1, |
3859f6a2 | 710 | .show_host_serial_number = 1, |
f6cd94b1 AH |
711 | .get_fc_host_stats = zfcp_get_fc_host_stats, |
712 | .reset_fc_host_stats = zfcp_reset_fc_host_stats, | |
338151e0 | 713 | .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, |
85a82392 | 714 | .get_host_port_state = zfcp_get_host_port_state, |
a2fa0aed | 715 | .terminate_rport_io = zfcp_scsi_terminate_rport_io, |
85a82392 | 716 | .show_host_port_state = 1, |
0fdd2133 | 717 | .show_host_active_fc4s = 1, |
7c7dc196 | 718 | .bsg_request = zfcp_fc_exec_bsg_job, |
491ca442 | 719 | .bsg_timeout = zfcp_fc_timeout_bsg_job, |
f6cd94b1 AH |
720 | /* no functions registered for following dynamic attributes but |
721 | directly set by LLDD */ | |
ad757cdf | 722 | .show_host_port_type = 1, |
038d9446 | 723 | .show_host_symbolic_name = 1, |
13e1e1f0 AH |
724 | .show_host_speed = 1, |
725 | .show_host_port_id = 1, | |
7c7dc196 | 726 | .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), |
1da177e4 | 727 | }; |