Commit | Line | Data |
---|---|---|
41fa2ada | 1 | /* |
553448f6 | 2 | * zfcp device driver |
1da177e4 | 3 | * |
553448f6 | 4 | * Interface to Linux SCSI midlayer. |
41fa2ada | 5 | * |
54539504 | 6 | * Copyright IBM Corp. 2002, 2016 |
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 | 111 | if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { |
1c2287b9 | 112 | /* This could be |
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 | ||
54539504 BB |
231 | struct zfcp_scsi_req_filter { |
232 | u8 tmf_scope; | |
233 | u32 lun_handle; | |
234 | u32 port_handle; | |
235 | }; | |
236 | ||
237 | static void zfcp_scsi_forget_cmnd(struct zfcp_fsf_req *old_req, void *data) | |
238 | { | |
239 | struct zfcp_scsi_req_filter *filter = | |
240 | (struct zfcp_scsi_req_filter *)data; | |
241 | ||
242 | /* already aborted - prevent side-effects - or not a SCSI command */ | |
243 | if (old_req->data == NULL || old_req->fsf_command != FSF_QTCB_FCP_CMND) | |
244 | return; | |
245 | ||
246 | /* (tmf_scope == FCP_TMF_TGT_RESET || tmf_scope == FCP_TMF_LUN_RESET) */ | |
247 | if (old_req->qtcb->header.port_handle != filter->port_handle) | |
248 | return; | |
249 | ||
250 | if (filter->tmf_scope == FCP_TMF_LUN_RESET && | |
251 | old_req->qtcb->header.lun_handle != filter->lun_handle) | |
252 | return; | |
253 | ||
254 | zfcp_dbf_scsi_nullcmnd((struct scsi_cmnd *)old_req->data, old_req); | |
255 | old_req->data = NULL; | |
256 | } | |
257 | ||
258 | static void zfcp_scsi_forget_cmnds(struct zfcp_scsi_dev *zsdev, u8 tm_flags) | |
259 | { | |
260 | struct zfcp_adapter *adapter = zsdev->port->adapter; | |
261 | struct zfcp_scsi_req_filter filter = { | |
262 | .tmf_scope = FCP_TMF_TGT_RESET, | |
263 | .port_handle = zsdev->port->handle, | |
264 | }; | |
265 | unsigned long flags; | |
266 | ||
267 | if (tm_flags == FCP_TMF_LUN_RESET) { | |
268 | filter.tmf_scope = FCP_TMF_LUN_RESET; | |
269 | filter.lun_handle = zsdev->lun_handle; | |
270 | } | |
271 | ||
272 | /* | |
273 | * abort_lock secures against other processings - in the abort-function | |
274 | * and normal cmnd-handler - of (struct zfcp_fsf_req *)->data | |
275 | */ | |
276 | write_lock_irqsave(&adapter->abort_lock, flags); | |
277 | zfcp_reqlist_apply_for_all(adapter->req_list, zfcp_scsi_forget_cmnd, | |
278 | &filter); | |
279 | write_unlock_irqrestore(&adapter->abort_lock, flags); | |
280 | } | |
281 | ||
63caf367 | 282 | static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) |
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; | |
564e1c86 | 286 | struct zfcp_fsf_req *fsf_req = NULL; |
a1dbfddd | 287 | int retval = SUCCESS, ret; |
63caf367 CS |
288 | int retry = 3; |
289 | ||
290 | while (retry--) { | |
b62a8d9b | 291 | fsf_req = zfcp_fsf_fcp_task_mgmt(scpnt, tm_flags); |
63caf367 CS |
292 | if (fsf_req) |
293 | break; | |
294 | ||
295 | zfcp_erp_wait(adapter); | |
a1dbfddd | 296 | ret = fc_block_scsi_eh(scpnt); |
2c7bfb34 SM |
297 | if (ret) { |
298 | zfcp_dbf_scsi_devreset("fiof", scpnt, tm_flags); | |
a1dbfddd | 299 | return ret; |
2c7bfb34 | 300 | } |
a1dbfddd | 301 | |
63caf367 CS |
302 | if (!(atomic_read(&adapter->status) & |
303 | ZFCP_STATUS_COMMON_RUNNING)) { | |
b62a8d9b | 304 | zfcp_dbf_scsi_devreset("nres", scpnt, tm_flags); |
63caf367 CS |
305 | return SUCCESS; |
306 | } | |
1da177e4 | 307 | } |
2c7bfb34 SM |
308 | if (!fsf_req) { |
309 | zfcp_dbf_scsi_devreset("reqf", scpnt, tm_flags); | |
63caf367 | 310 | return FAILED; |
2c7bfb34 | 311 | } |
1da177e4 | 312 | |
058b8647 | 313 | wait_for_completion(&fsf_req->completion); |
77eb1699 | 314 | |
8a36e453 | 315 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { |
b62a8d9b | 316 | zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags); |
f76af7d7 | 317 | retval = FAILED; |
54539504 | 318 | } else { |
b62a8d9b | 319 | zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags); |
54539504 BB |
320 | zfcp_scsi_forget_cmnds(zfcp_sdev, tm_flags); |
321 | } | |
77eb1699 AH |
322 | |
323 | zfcp_fsf_req_free(fsf_req); | |
1da177e4 LT |
324 | return retval; |
325 | } | |
326 | ||
f76af7d7 MP |
327 | static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) |
328 | { | |
4318e08c | 329 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); |
f76af7d7 MP |
330 | } |
331 | ||
332 | static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) | |
333 | { | |
4318e08c | 334 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); |
f76af7d7 MP |
335 | } |
336 | ||
2b67fc46 | 337 | static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) |
1da177e4 | 338 | { |
b62a8d9b CS |
339 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); |
340 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
a1dbfddd | 341 | int ret; |
1da177e4 | 342 | |
ea4a3a6a | 343 | zfcp_erp_adapter_reopen(adapter, 0, "schrh_1"); |
81654286 | 344 | zfcp_erp_wait(adapter); |
a1dbfddd CS |
345 | ret = fc_block_scsi_eh(scpnt); |
346 | if (ret) | |
347 | return ret; | |
1da177e4 | 348 | |
810f1e3e | 349 | return SUCCESS; |
1da177e4 LT |
350 | } |
351 | ||
1947c72a CS |
352 | struct scsi_transport_template *zfcp_scsi_transport_template; |
353 | ||
354 | static struct scsi_host_template zfcp_scsi_host_template = { | |
355 | .module = THIS_MODULE, | |
356 | .name = "zfcp", | |
357 | .queuecommand = zfcp_scsi_queuecommand, | |
358 | .eh_abort_handler = zfcp_scsi_eh_abort_handler, | |
359 | .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, | |
360 | .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, | |
361 | .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, | |
362 | .slave_alloc = zfcp_scsi_slave_alloc, | |
363 | .slave_configure = zfcp_scsi_slave_configure, | |
364 | .slave_destroy = zfcp_scsi_slave_destroy, | |
365 | .change_queue_depth = zfcp_scsi_change_queue_depth, | |
366 | .proc_name = "zfcp", | |
367 | .can_queue = 4096, | |
368 | .this_id = -1, | |
b22b8386 SM |
369 | .sg_tablesize = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1) |
370 | * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2), | |
371 | /* GCD, adjusted later */ | |
372 | .max_sectors = (((QDIO_MAX_ELEMENTS_PER_BUFFER - 1) | |
373 | * ZFCP_QDIO_MAX_SBALS_PER_REQ) - 2) * 8, | |
374 | /* GCD, adjusted later */ | |
1947c72a CS |
375 | .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, |
376 | .cmd_per_lun = 1, | |
377 | .use_clustering = 1, | |
378 | .shost_attrs = zfcp_sysfs_shost_attrs, | |
379 | .sdev_attrs = zfcp_sysfs_sdev_attrs, | |
380 | }; | |
381 | ||
382 | /** | |
383 | * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer | |
384 | * @adapter: The zfcp adapter to register with the SCSI midlayer | |
385 | */ | |
386 | int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter) | |
1da177e4 | 387 | { |
f76af7d7 | 388 | struct ccw_dev_id dev_id; |
1da177e4 | 389 | |
9f28745a | 390 | if (adapter->scsi_host) |
f76af7d7 | 391 | return 0; |
9f28745a | 392 | |
f76af7d7 | 393 | ccw_device_get_id(adapter->ccw_device, &dev_id); |
1da177e4 | 394 | /* register adapter as SCSI host with mid layer of SCSI stack */ |
1947c72a | 395 | adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template, |
1da177e4 LT |
396 | sizeof (struct zfcp_adapter *)); |
397 | if (!adapter->scsi_host) { | |
553448f6 | 398 | dev_err(&adapter->ccw_device->dev, |
ff3b24fa CS |
399 | "Registering the FCP device with the " |
400 | "SCSI stack failed\n"); | |
f76af7d7 | 401 | return -EIO; |
1da177e4 | 402 | } |
1da177e4 LT |
403 | |
404 | /* tell the SCSI stack some characteristics of this adapter */ | |
f8210e34 CS |
405 | adapter->scsi_host->max_id = 511; |
406 | adapter->scsi_host->max_lun = 0xFFFFFFFF; | |
1da177e4 | 407 | adapter->scsi_host->max_channel = 0; |
f76af7d7 | 408 | adapter->scsi_host->unique_id = dev_id.devno; |
4318e08c | 409 | adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ |
1947c72a | 410 | adapter->scsi_host->transportt = zfcp_scsi_transport_template; |
1da177e4 | 411 | |
1da177e4 LT |
412 | adapter->scsi_host->hostdata[0] = (unsigned long) adapter; |
413 | ||
414 | if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { | |
415 | scsi_host_put(adapter->scsi_host); | |
f76af7d7 | 416 | return -EIO; |
1da177e4 | 417 | } |
f76af7d7 MP |
418 | |
419 | return 0; | |
1da177e4 LT |
420 | } |
421 | ||
1947c72a CS |
422 | /** |
423 | * zfcp_scsi_adapter_unregister - Unregister SCSI and FC host from SCSI midlayer | |
424 | * @adapter: The zfcp adapter to unregister. | |
425 | */ | |
426 | void zfcp_scsi_adapter_unregister(struct zfcp_adapter *adapter) | |
1da177e4 LT |
427 | { |
428 | struct Scsi_Host *shost; | |
13e1e1f0 | 429 | struct zfcp_port *port; |
1da177e4 LT |
430 | |
431 | shost = adapter->scsi_host; | |
432 | if (!shost) | |
433 | return; | |
f76af7d7 | 434 | |
ecf0c772 SS |
435 | read_lock_irq(&adapter->port_list_lock); |
436 | list_for_each_entry(port, &adapter->port_list, list) | |
f3450c7b | 437 | port->rport = NULL; |
ecf0c772 | 438 | read_unlock_irq(&adapter->port_list_lock); |
f76af7d7 | 439 | |
3859f6a2 | 440 | fc_remove_host(shost); |
1da177e4 LT |
441 | scsi_remove_host(shost); |
442 | scsi_host_put(shost); | |
443 | adapter->scsi_host = NULL; | |
1da177e4 LT |
444 | } |
445 | ||
f6cd94b1 AH |
446 | static struct fc_host_statistics* |
447 | zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) | |
1da177e4 | 448 | { |
f6cd94b1 | 449 | struct fc_host_statistics *fc_stats; |
1da177e4 | 450 | |
f6cd94b1 AH |
451 | if (!adapter->fc_stats) { |
452 | fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); | |
453 | if (!fc_stats) | |
454 | return NULL; | |
f3450c7b | 455 | adapter->fc_stats = fc_stats; /* freed in adapter_release */ |
f6cd94b1 AH |
456 | } |
457 | memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); | |
458 | return adapter->fc_stats; | |
1da177e4 LT |
459 | } |
460 | ||
f76af7d7 MP |
461 | static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, |
462 | struct fsf_qtcb_bottom_port *data, | |
463 | struct fsf_qtcb_bottom_port *old) | |
1da177e4 | 464 | { |
f76af7d7 MP |
465 | fc_stats->seconds_since_last_reset = |
466 | data->seconds_since_last_reset - old->seconds_since_last_reset; | |
f6cd94b1 AH |
467 | fc_stats->tx_frames = data->tx_frames - old->tx_frames; |
468 | fc_stats->tx_words = data->tx_words - old->tx_words; | |
469 | fc_stats->rx_frames = data->rx_frames - old->rx_frames; | |
470 | fc_stats->rx_words = data->rx_words - old->rx_words; | |
471 | fc_stats->lip_count = data->lip - old->lip; | |
472 | fc_stats->nos_count = data->nos - old->nos; | |
473 | fc_stats->error_frames = data->error_frames - old->error_frames; | |
474 | fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; | |
475 | fc_stats->link_failure_count = data->link_failure - old->link_failure; | |
476 | fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; | |
f76af7d7 MP |
477 | fc_stats->loss_of_signal_count = |
478 | data->loss_of_signal - old->loss_of_signal; | |
479 | fc_stats->prim_seq_protocol_err_count = | |
480 | data->psp_error_counts - old->psp_error_counts; | |
481 | fc_stats->invalid_tx_word_count = | |
482 | data->invalid_tx_words - old->invalid_tx_words; | |
f6cd94b1 | 483 | fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; |
f76af7d7 MP |
484 | fc_stats->fcp_input_requests = |
485 | data->input_requests - old->input_requests; | |
486 | fc_stats->fcp_output_requests = | |
487 | data->output_requests - old->output_requests; | |
488 | fc_stats->fcp_control_requests = | |
489 | data->control_requests - old->control_requests; | |
f6cd94b1 AH |
490 | fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; |
491 | fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; | |
492 | } | |
1da177e4 | 493 | |
f76af7d7 MP |
494 | static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, |
495 | struct fsf_qtcb_bottom_port *data) | |
f6cd94b1 AH |
496 | { |
497 | fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; | |
498 | fc_stats->tx_frames = data->tx_frames; | |
499 | fc_stats->tx_words = data->tx_words; | |
500 | fc_stats->rx_frames = data->rx_frames; | |
501 | fc_stats->rx_words = data->rx_words; | |
502 | fc_stats->lip_count = data->lip; | |
503 | fc_stats->nos_count = data->nos; | |
504 | fc_stats->error_frames = data->error_frames; | |
505 | fc_stats->dumped_frames = data->dumped_frames; | |
506 | fc_stats->link_failure_count = data->link_failure; | |
507 | fc_stats->loss_of_sync_count = data->loss_of_sync; | |
508 | fc_stats->loss_of_signal_count = data->loss_of_signal; | |
509 | fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; | |
510 | fc_stats->invalid_tx_word_count = data->invalid_tx_words; | |
511 | fc_stats->invalid_crc_count = data->invalid_crcs; | |
512 | fc_stats->fcp_input_requests = data->input_requests; | |
513 | fc_stats->fcp_output_requests = data->output_requests; | |
514 | fc_stats->fcp_control_requests = data->control_requests; | |
515 | fc_stats->fcp_input_megabytes = data->input_mb; | |
516 | fc_stats->fcp_output_megabytes = data->output_mb; | |
517 | } | |
518 | ||
f76af7d7 | 519 | static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) |
f6cd94b1 AH |
520 | { |
521 | struct zfcp_adapter *adapter; | |
522 | struct fc_host_statistics *fc_stats; | |
523 | struct fsf_qtcb_bottom_port *data; | |
524 | int ret; | |
525 | ||
f76af7d7 | 526 | adapter = (struct zfcp_adapter *)host->hostdata[0]; |
f6cd94b1 AH |
527 | fc_stats = zfcp_init_fc_host_stats(adapter); |
528 | if (!fc_stats) | |
529 | return NULL; | |
530 | ||
ec4081c6 | 531 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
532 | if (!data) |
533 | return NULL; | |
f6cd94b1 | 534 | |
564e1c86 | 535 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f6cd94b1 AH |
536 | if (ret) { |
537 | kfree(data); | |
f76af7d7 | 538 | return NULL; |
f6cd94b1 AH |
539 | } |
540 | ||
541 | if (adapter->stats_reset && | |
542 | ((jiffies/HZ - adapter->stats_reset) < | |
f76af7d7 | 543 | data->seconds_since_last_reset)) |
f6cd94b1 AH |
544 | zfcp_adjust_fc_host_stats(fc_stats, data, |
545 | adapter->stats_reset_data); | |
f76af7d7 | 546 | else |
f6cd94b1 AH |
547 | zfcp_set_fc_host_stats(fc_stats, data); |
548 | ||
549 | kfree(data); | |
550 | return fc_stats; | |
1da177e4 LT |
551 | } |
552 | ||
f76af7d7 | 553 | static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) |
1da177e4 | 554 | { |
f6cd94b1 | 555 | struct zfcp_adapter *adapter; |
f76af7d7 | 556 | struct fsf_qtcb_bottom_port *data; |
f6cd94b1 | 557 | int ret; |
1da177e4 | 558 | |
f6cd94b1 | 559 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; |
ec4081c6 | 560 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
f6cd94b1 AH |
561 | if (!data) |
562 | return; | |
f6cd94b1 | 563 | |
564e1c86 | 564 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
f76af7d7 | 565 | if (ret) |
83f6d6d7 | 566 | kfree(data); |
f76af7d7 | 567 | else { |
f6cd94b1 | 568 | adapter->stats_reset = jiffies/HZ; |
f76af7d7 | 569 | kfree(adapter->stats_reset_data); |
f6cd94b1 | 570 | adapter->stats_reset_data = data; /* finally freed in |
f3450c7b | 571 | adapter_release */ |
f6cd94b1 | 572 | } |
1da177e4 LT |
573 | } |
574 | ||
85a82392 SS |
575 | static void zfcp_get_host_port_state(struct Scsi_Host *shost) |
576 | { | |
577 | struct zfcp_adapter *adapter = | |
578 | (struct zfcp_adapter *)shost->hostdata[0]; | |
579 | int status = atomic_read(&adapter->status); | |
580 | ||
581 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && | |
582 | !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) | |
583 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
584 | else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) | |
585 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
586 | else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
587 | fc_host_port_state(shost) = FC_PORTSTATE_ERROR; | |
588 | else | |
589 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
590 | } | |
591 | ||
338151e0 AH |
592 | static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
593 | { | |
594 | rport->dev_loss_tmo = timeout; | |
595 | } | |
596 | ||
a2fa0aed CS |
597 | /** |
598 | * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport | |
599 | * @rport: The FC rport where to teminate I/O | |
600 | * | |
601 | * Abort all pending SCSI commands for a port by closing the | |
835dc298 CS |
602 | * port. Using a reopen avoids a conflict with a shutdown |
603 | * overwriting a reopen. The "forced" ensures that a disappeared port | |
604 | * is not opened again as valid due to the cached plogi data in | |
605 | * non-NPIV mode. | |
a2fa0aed CS |
606 | */ |
607 | static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) | |
608 | { | |
70932935 | 609 | struct zfcp_port *port; |
ea945ff8 SS |
610 | struct Scsi_Host *shost = rport_to_shost(rport); |
611 | struct zfcp_adapter *adapter = | |
612 | (struct zfcp_adapter *)shost->hostdata[0]; | |
70932935 | 613 | |
ea945ff8 | 614 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
a2fa0aed | 615 | |
70932935 | 616 | if (port) { |
ea4a3a6a | 617 | zfcp_erp_port_forced_reopen(port, 0, "sctrpi1"); |
615f59e0 | 618 | put_device(&port->dev); |
70932935 | 619 | } |
a2fa0aed CS |
620 | } |
621 | ||
622 | static void zfcp_scsi_rport_register(struct zfcp_port *port) | |
623 | { | |
624 | struct fc_rport_identifiers ids; | |
625 | struct fc_rport *rport; | |
626 | ||
379d6bf6 CS |
627 | if (port->rport) |
628 | return; | |
629 | ||
a2fa0aed CS |
630 | ids.node_name = port->wwnn; |
631 | ids.port_name = port->wwpn; | |
632 | ids.port_id = port->d_id; | |
633 | ids.roles = FC_RPORT_ROLE_FCP_TARGET; | |
634 | ||
efaebcb4 SM |
635 | zfcp_dbf_rec_trig("scpaddy", port->adapter, port, NULL, |
636 | ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD, | |
637 | ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD); | |
a2fa0aed CS |
638 | rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); |
639 | if (!rport) { | |
640 | dev_err(&port->adapter->ccw_device->dev, | |
641 | "Registering port 0x%016Lx failed\n", | |
642 | (unsigned long long)port->wwpn); | |
643 | return; | |
644 | } | |
645 | ||
a2fa0aed CS |
646 | rport->maxframe_size = port->maxframe_size; |
647 | rport->supported_classes = port->supported_classes; | |
648 | port->rport = rport; | |
1bf3ff02 | 649 | port->starget_id = rport->scsi_target_id; |
5a7de559 | 650 | |
1daa4eb5 | 651 | zfcp_unit_queue_scsi_scan(port); |
a2fa0aed CS |
652 | } |
653 | ||
654 | static void zfcp_scsi_rport_block(struct zfcp_port *port) | |
655 | { | |
70932935 CS |
656 | struct fc_rport *rport = port->rport; |
657 | ||
379d6bf6 | 658 | if (rport) { |
efaebcb4 SM |
659 | zfcp_dbf_rec_trig("scpdely", port->adapter, port, NULL, |
660 | ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL, | |
661 | ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL); | |
70932935 | 662 | fc_remote_port_delete(rport); |
379d6bf6 CS |
663 | port->rport = NULL; |
664 | } | |
a2fa0aed CS |
665 | } |
666 | ||
667 | void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) | |
668 | { | |
615f59e0 | 669 | get_device(&port->dev); |
a2fa0aed CS |
670 | port->rport_task = RPORT_ADD; |
671 | ||
4544683a | 672 | if (!queue_work(port->adapter->work_queue, &port->rport_work)) |
615f59e0 | 673 | put_device(&port->dev); |
a2fa0aed CS |
674 | } |
675 | ||
676 | void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) | |
677 | { | |
615f59e0 | 678 | get_device(&port->dev); |
a2fa0aed CS |
679 | port->rport_task = RPORT_DEL; |
680 | ||
4544683a SS |
681 | if (port->rport && queue_work(port->adapter->work_queue, |
682 | &port->rport_work)) | |
a67417ab SS |
683 | return; |
684 | ||
615f59e0 | 685 | put_device(&port->dev); |
a2fa0aed CS |
686 | } |
687 | ||
688 | void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) | |
689 | { | |
ecf0c772 | 690 | unsigned long flags; |
a2fa0aed CS |
691 | struct zfcp_port *port; |
692 | ||
ecf0c772 SS |
693 | read_lock_irqsave(&adapter->port_list_lock, flags); |
694 | list_for_each_entry(port, &adapter->port_list, list) | |
a2fa0aed | 695 | zfcp_scsi_schedule_rport_block(port); |
ecf0c772 | 696 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
a2fa0aed CS |
697 | } |
698 | ||
699 | void zfcp_scsi_rport_work(struct work_struct *work) | |
700 | { | |
701 | struct zfcp_port *port = container_of(work, struct zfcp_port, | |
702 | rport_work); | |
703 | ||
704 | while (port->rport_task) { | |
705 | if (port->rport_task == RPORT_ADD) { | |
706 | port->rport_task = RPORT_NONE; | |
707 | zfcp_scsi_rport_register(port); | |
708 | } else { | |
709 | port->rport_task = RPORT_NONE; | |
710 | zfcp_scsi_rport_block(port); | |
711 | } | |
712 | } | |
713 | ||
615f59e0 | 714 | put_device(&port->dev); |
a2fa0aed CS |
715 | } |
716 | ||
ef3eb71d FB |
717 | /** |
718 | * zfcp_scsi_set_prot - Configure DIF/DIX support in scsi_host | |
719 | * @adapter: The adapter where to configure DIF/DIX for the SCSI host | |
720 | */ | |
721 | void zfcp_scsi_set_prot(struct zfcp_adapter *adapter) | |
722 | { | |
723 | unsigned int mask = 0; | |
724 | unsigned int data_div; | |
725 | struct Scsi_Host *shost = adapter->scsi_host; | |
726 | ||
727 | data_div = atomic_read(&adapter->status) & | |
728 | ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED; | |
729 | ||
730 | if (enable_dif && | |
731 | adapter->adapter_features & FSF_FEATURE_DIF_PROT_TYPE1) | |
732 | mask |= SHOST_DIF_TYPE1_PROTECTION; | |
733 | ||
734 | if (enable_dif && data_div && | |
735 | adapter->adapter_features & FSF_FEATURE_DIX_PROT_TCPIP) { | |
736 | mask |= SHOST_DIX_TYPE1_PROTECTION; | |
737 | scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP); | |
86a9668a SS |
738 | shost->sg_prot_tablesize = adapter->qdio->max_sbale_per_req / 2; |
739 | shost->sg_tablesize = adapter->qdio->max_sbale_per_req / 2; | |
740 | shost->max_sectors = shost->sg_tablesize * 8; | |
ef3eb71d FB |
741 | } |
742 | ||
743 | scsi_host_set_prot(shost, mask); | |
744 | } | |
745 | ||
746 | /** | |
747 | * zfcp_scsi_dif_sense_error - Report DIF/DIX error as driver sense error | |
748 | * @scmd: The SCSI command to report the error for | |
749 | * @ascq: The ASCQ to put in the sense buffer | |
750 | * | |
751 | * See the error handling in sd_done for the sense codes used here. | |
752 | * Set DID_SOFT_ERROR to retry the request, if possible. | |
753 | */ | |
754 | void zfcp_scsi_dif_sense_error(struct scsi_cmnd *scmd, int ascq) | |
755 | { | |
756 | scsi_build_sense_buffer(1, scmd->sense_buffer, | |
757 | ILLEGAL_REQUEST, 0x10, ascq); | |
758 | set_driver_byte(scmd, DRIVER_SENSE); | |
759 | scmd->result |= SAM_STAT_CHECK_CONDITION; | |
760 | set_host_byte(scmd, DID_SOFT_ERROR); | |
761 | } | |
762 | ||
1da177e4 | 763 | struct fc_function_template zfcp_transport_functions = { |
1da177e4 LT |
764 | .show_starget_port_id = 1, |
765 | .show_starget_port_name = 1, | |
766 | .show_starget_node_name = 1, | |
3859f6a2 | 767 | .show_rport_supported_classes = 1, |
75bfc283 | 768 | .show_rport_maxframe_size = 1, |
338151e0 | 769 | .show_rport_dev_loss_tmo = 1, |
3859f6a2 AH |
770 | .show_host_node_name = 1, |
771 | .show_host_port_name = 1, | |
ad757cdf | 772 | .show_host_permanent_port_name = 1, |
3859f6a2 | 773 | .show_host_supported_classes = 1, |
0fdd2133 | 774 | .show_host_supported_fc4s = 1, |
ad757cdf | 775 | .show_host_supported_speeds = 1, |
13e1e1f0 | 776 | .show_host_maxframe_size = 1, |
3859f6a2 | 777 | .show_host_serial_number = 1, |
f6cd94b1 AH |
778 | .get_fc_host_stats = zfcp_get_fc_host_stats, |
779 | .reset_fc_host_stats = zfcp_reset_fc_host_stats, | |
338151e0 | 780 | .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, |
85a82392 | 781 | .get_host_port_state = zfcp_get_host_port_state, |
a2fa0aed | 782 | .terminate_rport_io = zfcp_scsi_terminate_rport_io, |
85a82392 | 783 | .show_host_port_state = 1, |
0fdd2133 | 784 | .show_host_active_fc4s = 1, |
7c7dc196 | 785 | .bsg_request = zfcp_fc_exec_bsg_job, |
491ca442 | 786 | .bsg_timeout = zfcp_fc_timeout_bsg_job, |
f6cd94b1 AH |
787 | /* no functions registered for following dynamic attributes but |
788 | directly set by LLDD */ | |
ad757cdf | 789 | .show_host_port_type = 1, |
038d9446 | 790 | .show_host_symbolic_name = 1, |
13e1e1f0 AH |
791 | .show_host_speed = 1, |
792 | .show_host_port_id = 1, | |
7c7dc196 | 793 | .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), |
1da177e4 | 794 | }; |