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072b91f9 BK |
1 | /* |
2 | * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter | |
3 | * | |
4 | * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation | |
5 | * | |
6 | * Copyright (C) IBM Corporation, 2008 | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | */ | |
23 | ||
24 | #include <linux/module.h> | |
25 | #include <linux/moduleparam.h> | |
26 | #include <linux/dma-mapping.h> | |
27 | #include <linux/dmapool.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/interrupt.h> | |
30 | #include <linux/kthread.h> | |
31 | #include <linux/of.h> | |
32 | #include <linux/stringify.h> | |
33 | #include <asm/firmware.h> | |
34 | #include <asm/irq.h> | |
35 | #include <asm/vio.h> | |
36 | #include <scsi/scsi.h> | |
37 | #include <scsi/scsi_cmnd.h> | |
38 | #include <scsi/scsi_host.h> | |
39 | #include <scsi/scsi_device.h> | |
40 | #include <scsi/scsi_tcq.h> | |
41 | #include <scsi/scsi_transport_fc.h> | |
42 | #include "ibmvfc.h" | |
43 | ||
44 | static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; | |
45 | static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; | |
46 | static unsigned int max_lun = IBMVFC_MAX_LUN; | |
47 | static unsigned int max_targets = IBMVFC_MAX_TARGETS; | |
48 | static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; | |
49 | static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; | |
50 | static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO; | |
51 | static unsigned int ibmvfc_debug = IBMVFC_DEBUG; | |
52 | static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; | |
53 | static LIST_HEAD(ibmvfc_head); | |
54 | static DEFINE_SPINLOCK(ibmvfc_driver_lock); | |
55 | static struct scsi_transport_template *ibmvfc_transport_template; | |
56 | ||
57 | MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); | |
58 | MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); | |
59 | MODULE_LICENSE("GPL"); | |
60 | MODULE_VERSION(IBMVFC_DRIVER_VERSION); | |
61 | ||
62 | module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); | |
63 | MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " | |
64 | "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); | |
65 | module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); | |
66 | MODULE_PARM_DESC(default_timeout, | |
67 | "Default timeout in seconds for initialization and EH commands. " | |
68 | "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); | |
69 | module_param_named(max_requests, max_requests, uint, S_IRUGO); | |
70 | MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " | |
71 | "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); | |
72 | module_param_named(max_lun, max_lun, uint, S_IRUGO); | |
73 | MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " | |
74 | "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); | |
75 | module_param_named(max_targets, max_targets, uint, S_IRUGO); | |
76 | MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " | |
77 | "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); | |
78 | module_param_named(disc_threads, disc_threads, uint, S_IRUGO | S_IWUSR); | |
79 | MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " | |
80 | "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); | |
81 | module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); | |
82 | MODULE_PARM_DESC(debug, "Enable driver debug information. " | |
83 | "[Default=" __stringify(IBMVFC_DEBUG) "]"); | |
84 | module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR); | |
85 | MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC " | |
86 | "transport should insulate the loss of a remote port. Once this " | |
87 | "value is exceeded, the scsi target is removed. " | |
88 | "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]"); | |
89 | module_param_named(log_level, log_level, uint, 0); | |
90 | MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " | |
91 | "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); | |
92 | ||
93 | static const struct { | |
94 | u16 status; | |
95 | u16 error; | |
96 | u8 result; | |
97 | u8 retry; | |
98 | int log; | |
99 | char *name; | |
100 | } cmd_status [] = { | |
101 | { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, | |
102 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, | |
103 | { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, | |
104 | { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_NO_CONNECT, 1, 1, "network down" }, | |
105 | { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, | |
106 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, | |
107 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, | |
108 | { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, | |
109 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, | |
110 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, | |
111 | { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, | |
112 | { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, | |
113 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 0, 0, "link halted" }, | |
114 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, | |
115 | ||
116 | { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, | |
117 | { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, | |
118 | { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ABORT, 0, 1, "invalid parameter" }, | |
119 | { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ABORT, 0, 1, "missing parameter" }, | |
120 | { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, | |
121 | { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ABORT, 0, 1, "transaction cancelled" }, | |
122 | { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ABORT, 0, 1, "transaction cancelled implicit" }, | |
123 | { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, | |
124 | { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, | |
125 | ||
126 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, | |
127 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, | |
128 | { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, | |
129 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, | |
130 | { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, | |
131 | { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, | |
132 | { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, | |
133 | { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, | |
134 | { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, | |
135 | { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, | |
136 | { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, | |
137 | ||
138 | { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, | |
139 | }; | |
140 | ||
141 | static void ibmvfc_npiv_login(struct ibmvfc_host *); | |
142 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); | |
143 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); | |
144 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *); | |
145 | ||
146 | static const char *unknown_error = "unknown error"; | |
147 | ||
148 | #ifdef CONFIG_SCSI_IBMVFC_TRACE | |
149 | /** | |
150 | * ibmvfc_trc_start - Log a start trace entry | |
151 | * @evt: ibmvfc event struct | |
152 | * | |
153 | **/ | |
154 | static void ibmvfc_trc_start(struct ibmvfc_event *evt) | |
155 | { | |
156 | struct ibmvfc_host *vhost = evt->vhost; | |
157 | struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; | |
158 | struct ibmvfc_mad_common *mad = &evt->iu.mad_common; | |
159 | struct ibmvfc_trace_entry *entry; | |
160 | ||
161 | entry = &vhost->trace[vhost->trace_index++]; | |
162 | entry->evt = evt; | |
163 | entry->time = jiffies; | |
164 | entry->fmt = evt->crq.format; | |
165 | entry->type = IBMVFC_TRC_START; | |
166 | ||
167 | switch (entry->fmt) { | |
168 | case IBMVFC_CMD_FORMAT: | |
169 | entry->op_code = vfc_cmd->iu.cdb[0]; | |
170 | entry->scsi_id = vfc_cmd->tgt_scsi_id; | |
171 | entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); | |
172 | entry->tmf_flags = vfc_cmd->iu.tmf_flags; | |
173 | entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; | |
174 | break; | |
175 | case IBMVFC_MAD_FORMAT: | |
176 | entry->op_code = mad->opcode; | |
177 | break; | |
178 | default: | |
179 | break; | |
180 | }; | |
181 | } | |
182 | ||
183 | /** | |
184 | * ibmvfc_trc_end - Log an end trace entry | |
185 | * @evt: ibmvfc event struct | |
186 | * | |
187 | **/ | |
188 | static void ibmvfc_trc_end(struct ibmvfc_event *evt) | |
189 | { | |
190 | struct ibmvfc_host *vhost = evt->vhost; | |
191 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
192 | struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; | |
193 | struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; | |
194 | ||
195 | entry->evt = evt; | |
196 | entry->time = jiffies; | |
197 | entry->fmt = evt->crq.format; | |
198 | entry->type = IBMVFC_TRC_END; | |
199 | ||
200 | switch (entry->fmt) { | |
201 | case IBMVFC_CMD_FORMAT: | |
202 | entry->op_code = vfc_cmd->iu.cdb[0]; | |
203 | entry->scsi_id = vfc_cmd->tgt_scsi_id; | |
204 | entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); | |
205 | entry->tmf_flags = vfc_cmd->iu.tmf_flags; | |
206 | entry->u.end.status = vfc_cmd->status; | |
207 | entry->u.end.error = vfc_cmd->error; | |
208 | entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; | |
209 | entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; | |
210 | entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; | |
211 | break; | |
212 | case IBMVFC_MAD_FORMAT: | |
213 | entry->op_code = mad->opcode; | |
214 | entry->u.end.status = mad->status; | |
215 | break; | |
216 | default: | |
217 | break; | |
218 | ||
219 | }; | |
220 | } | |
221 | ||
222 | #else | |
223 | #define ibmvfc_trc_start(evt) do { } while (0) | |
224 | #define ibmvfc_trc_end(evt) do { } while (0) | |
225 | #endif | |
226 | ||
227 | /** | |
228 | * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response | |
229 | * @status: status / error class | |
230 | * @error: error | |
231 | * | |
232 | * Return value: | |
233 | * index into cmd_status / -EINVAL on failure | |
234 | **/ | |
235 | static int ibmvfc_get_err_index(u16 status, u16 error) | |
236 | { | |
237 | int i; | |
238 | ||
239 | for (i = 0; i < ARRAY_SIZE(cmd_status); i++) | |
240 | if ((cmd_status[i].status & status) == cmd_status[i].status && | |
241 | cmd_status[i].error == error) | |
242 | return i; | |
243 | ||
244 | return -EINVAL; | |
245 | } | |
246 | ||
247 | /** | |
248 | * ibmvfc_get_cmd_error - Find the error description for the fcp response | |
249 | * @status: status / error class | |
250 | * @error: error | |
251 | * | |
252 | * Return value: | |
253 | * error description string | |
254 | **/ | |
255 | static const char *ibmvfc_get_cmd_error(u16 status, u16 error) | |
256 | { | |
257 | int rc = ibmvfc_get_err_index(status, error); | |
258 | if (rc >= 0) | |
259 | return cmd_status[rc].name; | |
260 | return unknown_error; | |
261 | } | |
262 | ||
263 | /** | |
264 | * ibmvfc_get_err_result - Find the scsi status to return for the fcp response | |
265 | * @vfc_cmd: ibmvfc command struct | |
266 | * | |
267 | * Return value: | |
268 | * SCSI result value to return for completed command | |
269 | **/ | |
270 | static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) | |
271 | { | |
272 | int err; | |
273 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; | |
274 | int fc_rsp_len = rsp->fcp_rsp_len; | |
275 | ||
276 | if ((rsp->flags & FCP_RSP_LEN_VALID) && | |
277 | ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || | |
278 | rsp->data.info.rsp_code)) | |
279 | return DID_ERROR << 16; | |
280 | ||
072b91f9 BK |
281 | err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); |
282 | if (err >= 0) | |
283 | return rsp->scsi_status | (cmd_status[err].result << 16); | |
284 | return rsp->scsi_status | (DID_ERROR << 16); | |
285 | } | |
286 | ||
287 | /** | |
288 | * ibmvfc_retry_cmd - Determine if error status is retryable | |
289 | * @status: status / error class | |
290 | * @error: error | |
291 | * | |
292 | * Return value: | |
293 | * 1 if error should be retried / 0 if it should not | |
294 | **/ | |
295 | static int ibmvfc_retry_cmd(u16 status, u16 error) | |
296 | { | |
297 | int rc = ibmvfc_get_err_index(status, error); | |
298 | ||
299 | if (rc >= 0) | |
300 | return cmd_status[rc].retry; | |
301 | return 1; | |
302 | } | |
303 | ||
304 | static const char *unknown_fc_explain = "unknown fc explain"; | |
305 | ||
306 | static const struct { | |
307 | u16 fc_explain; | |
308 | char *name; | |
309 | } ls_explain [] = { | |
310 | { 0x00, "no additional explanation" }, | |
311 | { 0x01, "service parameter error - options" }, | |
312 | { 0x03, "service parameter error - initiator control" }, | |
313 | { 0x05, "service parameter error - recipient control" }, | |
314 | { 0x07, "service parameter error - received data field size" }, | |
315 | { 0x09, "service parameter error - concurrent seq" }, | |
316 | { 0x0B, "service parameter error - credit" }, | |
317 | { 0x0D, "invalid N_Port/F_Port_Name" }, | |
318 | { 0x0E, "invalid node/Fabric Name" }, | |
319 | { 0x0F, "invalid common service parameters" }, | |
320 | { 0x11, "invalid association header" }, | |
321 | { 0x13, "association header required" }, | |
322 | { 0x15, "invalid originator S_ID" }, | |
323 | { 0x17, "invalid OX_ID-RX-ID combination" }, | |
324 | { 0x19, "command (request) already in progress" }, | |
325 | { 0x1E, "N_Port Login requested" }, | |
326 | { 0x1F, "Invalid N_Port_ID" }, | |
327 | }; | |
328 | ||
329 | static const struct { | |
330 | u16 fc_explain; | |
331 | char *name; | |
332 | } gs_explain [] = { | |
333 | { 0x00, "no additional explanation" }, | |
334 | { 0x01, "port identifier not registered" }, | |
335 | { 0x02, "port name not registered" }, | |
336 | { 0x03, "node name not registered" }, | |
337 | { 0x04, "class of service not registered" }, | |
338 | { 0x06, "initial process associator not registered" }, | |
339 | { 0x07, "FC-4 TYPEs not registered" }, | |
340 | { 0x08, "symbolic port name not registered" }, | |
341 | { 0x09, "symbolic node name not registered" }, | |
342 | { 0x0A, "port type not registered" }, | |
343 | { 0xF0, "authorization exception" }, | |
344 | { 0xF1, "authentication exception" }, | |
345 | { 0xF2, "data base full" }, | |
346 | { 0xF3, "data base empty" }, | |
347 | { 0xF4, "processing request" }, | |
348 | { 0xF5, "unable to verify connection" }, | |
349 | { 0xF6, "devices not in a common zone" }, | |
350 | }; | |
351 | ||
352 | /** | |
353 | * ibmvfc_get_ls_explain - Return the FC Explain description text | |
354 | * @status: FC Explain status | |
355 | * | |
356 | * Returns: | |
357 | * error string | |
358 | **/ | |
359 | static const char *ibmvfc_get_ls_explain(u16 status) | |
360 | { | |
361 | int i; | |
362 | ||
363 | for (i = 0; i < ARRAY_SIZE(ls_explain); i++) | |
364 | if (ls_explain[i].fc_explain == status) | |
365 | return ls_explain[i].name; | |
366 | ||
367 | return unknown_fc_explain; | |
368 | } | |
369 | ||
370 | /** | |
371 | * ibmvfc_get_gs_explain - Return the FC Explain description text | |
372 | * @status: FC Explain status | |
373 | * | |
374 | * Returns: | |
375 | * error string | |
376 | **/ | |
377 | static const char *ibmvfc_get_gs_explain(u16 status) | |
378 | { | |
379 | int i; | |
380 | ||
381 | for (i = 0; i < ARRAY_SIZE(gs_explain); i++) | |
382 | if (gs_explain[i].fc_explain == status) | |
383 | return gs_explain[i].name; | |
384 | ||
385 | return unknown_fc_explain; | |
386 | } | |
387 | ||
388 | static const struct { | |
389 | enum ibmvfc_fc_type fc_type; | |
390 | char *name; | |
391 | } fc_type [] = { | |
392 | { IBMVFC_FABRIC_REJECT, "fabric reject" }, | |
393 | { IBMVFC_PORT_REJECT, "port reject" }, | |
394 | { IBMVFC_LS_REJECT, "ELS reject" }, | |
395 | { IBMVFC_FABRIC_BUSY, "fabric busy" }, | |
396 | { IBMVFC_PORT_BUSY, "port busy" }, | |
397 | { IBMVFC_BASIC_REJECT, "basic reject" }, | |
398 | }; | |
399 | ||
400 | static const char *unknown_fc_type = "unknown fc type"; | |
401 | ||
402 | /** | |
403 | * ibmvfc_get_fc_type - Return the FC Type description text | |
404 | * @status: FC Type error status | |
405 | * | |
406 | * Returns: | |
407 | * error string | |
408 | **/ | |
409 | static const char *ibmvfc_get_fc_type(u16 status) | |
410 | { | |
411 | int i; | |
412 | ||
413 | for (i = 0; i < ARRAY_SIZE(fc_type); i++) | |
414 | if (fc_type[i].fc_type == status) | |
415 | return fc_type[i].name; | |
416 | ||
417 | return unknown_fc_type; | |
418 | } | |
419 | ||
420 | /** | |
421 | * ibmvfc_set_tgt_action - Set the next init action for the target | |
422 | * @tgt: ibmvfc target struct | |
423 | * @action: action to perform | |
424 | * | |
425 | **/ | |
426 | static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, | |
427 | enum ibmvfc_target_action action) | |
428 | { | |
429 | switch (tgt->action) { | |
430 | case IBMVFC_TGT_ACTION_DEL_RPORT: | |
431 | break; | |
432 | default: | |
433 | tgt->action = action; | |
434 | break; | |
435 | } | |
436 | } | |
437 | ||
438 | /** | |
439 | * ibmvfc_set_host_state - Set the state for the host | |
440 | * @vhost: ibmvfc host struct | |
441 | * @state: state to set host to | |
442 | * | |
443 | * Returns: | |
444 | * 0 if state changed / non-zero if not changed | |
445 | **/ | |
446 | static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, | |
447 | enum ibmvfc_host_state state) | |
448 | { | |
449 | int rc = 0; | |
450 | ||
451 | switch (vhost->state) { | |
452 | case IBMVFC_HOST_OFFLINE: | |
453 | rc = -EINVAL; | |
454 | break; | |
455 | default: | |
456 | vhost->state = state; | |
457 | break; | |
458 | }; | |
459 | ||
460 | return rc; | |
461 | } | |
462 | ||
463 | /** | |
464 | * ibmvfc_set_host_action - Set the next init action for the host | |
465 | * @vhost: ibmvfc host struct | |
466 | * @action: action to perform | |
467 | * | |
468 | **/ | |
469 | static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, | |
470 | enum ibmvfc_host_action action) | |
471 | { | |
472 | switch (action) { | |
473 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: | |
474 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) | |
475 | vhost->action = action; | |
476 | break; | |
477 | case IBMVFC_HOST_ACTION_INIT_WAIT: | |
478 | if (vhost->action == IBMVFC_HOST_ACTION_INIT) | |
479 | vhost->action = action; | |
480 | break; | |
481 | case IBMVFC_HOST_ACTION_QUERY: | |
482 | switch (vhost->action) { | |
483 | case IBMVFC_HOST_ACTION_INIT_WAIT: | |
484 | case IBMVFC_HOST_ACTION_NONE: | |
485 | case IBMVFC_HOST_ACTION_TGT_ADD: | |
486 | vhost->action = action; | |
487 | break; | |
488 | default: | |
489 | break; | |
490 | }; | |
491 | break; | |
492 | case IBMVFC_HOST_ACTION_TGT_INIT: | |
493 | if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) | |
494 | vhost->action = action; | |
495 | break; | |
496 | case IBMVFC_HOST_ACTION_INIT: | |
497 | case IBMVFC_HOST_ACTION_TGT_DEL: | |
498 | case IBMVFC_HOST_ACTION_QUERY_TGTS: | |
10e79499 | 499 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 BK |
500 | case IBMVFC_HOST_ACTION_TGT_ADD: |
501 | case IBMVFC_HOST_ACTION_NONE: | |
502 | default: | |
503 | vhost->action = action; | |
504 | break; | |
505 | }; | |
506 | } | |
507 | ||
508 | /** | |
509 | * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) | |
510 | * @vhost: ibmvfc host struct | |
511 | * | |
512 | * Return value: | |
513 | * nothing | |
514 | **/ | |
515 | static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) | |
516 | { | |
517 | if (vhost->action == IBMVFC_HOST_ACTION_NONE) { | |
2d0da2a4 BK |
518 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
519 | scsi_block_requests(vhost->host); | |
520 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); | |
521 | } | |
072b91f9 BK |
522 | } else |
523 | vhost->reinit = 1; | |
524 | ||
525 | wake_up(&vhost->work_wait_q); | |
526 | } | |
527 | ||
528 | /** | |
529 | * ibmvfc_link_down - Handle a link down event from the adapter | |
530 | * @vhost: ibmvfc host struct | |
531 | * @state: ibmvfc host state to enter | |
532 | * | |
533 | **/ | |
534 | static void ibmvfc_link_down(struct ibmvfc_host *vhost, | |
535 | enum ibmvfc_host_state state) | |
536 | { | |
537 | struct ibmvfc_target *tgt; | |
538 | ||
539 | ENTER; | |
540 | scsi_block_requests(vhost->host); | |
541 | list_for_each_entry(tgt, &vhost->targets, queue) | |
542 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
543 | ibmvfc_set_host_state(vhost, state); | |
544 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); | |
545 | vhost->events_to_log |= IBMVFC_AE_LINKDOWN; | |
546 | wake_up(&vhost->work_wait_q); | |
547 | LEAVE; | |
548 | } | |
549 | ||
550 | /** | |
551 | * ibmvfc_init_host - Start host initialization | |
552 | * @vhost: ibmvfc host struct | |
cf6f10d7 | 553 | * @relogin: is this a re-login? |
072b91f9 BK |
554 | * |
555 | * Return value: | |
556 | * nothing | |
557 | **/ | |
cf6f10d7 | 558 | static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin) |
072b91f9 BK |
559 | { |
560 | struct ibmvfc_target *tgt; | |
561 | ||
562 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { | |
563 | if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) { | |
564 | dev_err(vhost->dev, | |
565 | "Host initialization retries exceeded. Taking adapter offline\n"); | |
566 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); | |
567 | return; | |
568 | } | |
569 | } | |
570 | ||
571 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { | |
cf6f10d7 BK |
572 | if (!relogin) { |
573 | memset(vhost->async_crq.msgs, 0, PAGE_SIZE); | |
574 | vhost->async_crq.cur = 0; | |
575 | } | |
576 | ||
072b91f9 BK |
577 | list_for_each_entry(tgt, &vhost->targets, queue) |
578 | tgt->need_login = 1; | |
579 | scsi_block_requests(vhost->host); | |
580 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); | |
581 | vhost->job_step = ibmvfc_npiv_login; | |
582 | wake_up(&vhost->work_wait_q); | |
583 | } | |
584 | } | |
585 | ||
586 | /** | |
587 | * ibmvfc_send_crq - Send a CRQ | |
588 | * @vhost: ibmvfc host struct | |
589 | * @word1: the first 64 bits of the data | |
590 | * @word2: the second 64 bits of the data | |
591 | * | |
592 | * Return value: | |
593 | * 0 on success / other on failure | |
594 | **/ | |
595 | static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) | |
596 | { | |
597 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
598 | return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); | |
599 | } | |
600 | ||
601 | /** | |
602 | * ibmvfc_send_crq_init - Send a CRQ init message | |
603 | * @vhost: ibmvfc host struct | |
604 | * | |
605 | * Return value: | |
606 | * 0 on success / other on failure | |
607 | **/ | |
608 | static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) | |
609 | { | |
610 | ibmvfc_dbg(vhost, "Sending CRQ init\n"); | |
611 | return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); | |
612 | } | |
613 | ||
614 | /** | |
615 | * ibmvfc_send_crq_init_complete - Send a CRQ init complete message | |
616 | * @vhost: ibmvfc host struct | |
617 | * | |
618 | * Return value: | |
619 | * 0 on success / other on failure | |
620 | **/ | |
621 | static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) | |
622 | { | |
623 | ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); | |
624 | return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); | |
625 | } | |
626 | ||
627 | /** | |
628 | * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ | |
629 | * @vhost: ibmvfc host struct | |
630 | * | |
631 | * Frees irq, deallocates a page for messages, unmaps dma, and unregisters | |
632 | * the crq with the hypervisor. | |
633 | **/ | |
634 | static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) | |
635 | { | |
636 | long rc; | |
637 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
638 | struct ibmvfc_crq_queue *crq = &vhost->crq; | |
639 | ||
640 | ibmvfc_dbg(vhost, "Releasing CRQ\n"); | |
641 | free_irq(vdev->irq, vhost); | |
642 | do { | |
643 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); | |
644 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
645 | ||
646 | vhost->state = IBMVFC_NO_CRQ; | |
647 | dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); | |
648 | free_page((unsigned long)crq->msgs); | |
649 | } | |
650 | ||
651 | /** | |
652 | * ibmvfc_reenable_crq_queue - reenables the CRQ | |
653 | * @vhost: ibmvfc host struct | |
654 | * | |
655 | * Return value: | |
656 | * 0 on success / other on failure | |
657 | **/ | |
658 | static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) | |
659 | { | |
660 | int rc; | |
661 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
662 | ||
663 | /* Re-enable the CRQ */ | |
664 | do { | |
665 | rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); | |
666 | } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
667 | ||
668 | if (rc) | |
669 | dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); | |
670 | ||
671 | return rc; | |
672 | } | |
673 | ||
674 | /** | |
675 | * ibmvfc_reset_crq - resets a crq after a failure | |
676 | * @vhost: ibmvfc host struct | |
677 | * | |
678 | * Return value: | |
679 | * 0 on success / other on failure | |
680 | **/ | |
681 | static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) | |
682 | { | |
683 | int rc; | |
684 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
685 | struct ibmvfc_crq_queue *crq = &vhost->crq; | |
686 | ||
687 | /* Close the CRQ */ | |
688 | do { | |
689 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); | |
690 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
691 | ||
692 | vhost->state = IBMVFC_NO_CRQ; | |
693 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); | |
694 | ||
695 | /* Clean out the queue */ | |
696 | memset(crq->msgs, 0, PAGE_SIZE); | |
697 | crq->cur = 0; | |
698 | ||
699 | /* And re-open it again */ | |
700 | rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, | |
701 | crq->msg_token, PAGE_SIZE); | |
702 | ||
703 | if (rc == H_CLOSED) | |
704 | /* Adapter is good, but other end is not ready */ | |
705 | dev_warn(vhost->dev, "Partner adapter not ready\n"); | |
706 | else if (rc != 0) | |
707 | dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); | |
708 | ||
709 | return rc; | |
710 | } | |
711 | ||
712 | /** | |
713 | * ibmvfc_valid_event - Determines if event is valid. | |
714 | * @pool: event_pool that contains the event | |
715 | * @evt: ibmvfc event to be checked for validity | |
716 | * | |
717 | * Return value: | |
718 | * 1 if event is valid / 0 if event is not valid | |
719 | **/ | |
720 | static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, | |
721 | struct ibmvfc_event *evt) | |
722 | { | |
723 | int index = evt - pool->events; | |
724 | if (index < 0 || index >= pool->size) /* outside of bounds */ | |
725 | return 0; | |
726 | if (evt != pool->events + index) /* unaligned */ | |
727 | return 0; | |
728 | return 1; | |
729 | } | |
730 | ||
731 | /** | |
732 | * ibmvfc_free_event - Free the specified event | |
733 | * @evt: ibmvfc_event to be freed | |
734 | * | |
735 | **/ | |
736 | static void ibmvfc_free_event(struct ibmvfc_event *evt) | |
737 | { | |
738 | struct ibmvfc_host *vhost = evt->vhost; | |
739 | struct ibmvfc_event_pool *pool = &vhost->pool; | |
740 | ||
741 | BUG_ON(!ibmvfc_valid_event(pool, evt)); | |
742 | BUG_ON(atomic_inc_return(&evt->free) != 1); | |
743 | list_add_tail(&evt->queue, &vhost->free); | |
744 | } | |
745 | ||
746 | /** | |
747 | * ibmvfc_scsi_eh_done - EH done function for queuecommand commands | |
748 | * @evt: ibmvfc event struct | |
749 | * | |
750 | * This function does not setup any error status, that must be done | |
751 | * before this function gets called. | |
752 | **/ | |
753 | static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) | |
754 | { | |
755 | struct scsi_cmnd *cmnd = evt->cmnd; | |
756 | ||
757 | if (cmnd) { | |
758 | scsi_dma_unmap(cmnd); | |
759 | cmnd->scsi_done(cmnd); | |
760 | } | |
761 | ||
ad8dcffa BK |
762 | if (evt->eh_comp) |
763 | complete(evt->eh_comp); | |
764 | ||
072b91f9 BK |
765 | ibmvfc_free_event(evt); |
766 | } | |
767 | ||
768 | /** | |
769 | * ibmvfc_fail_request - Fail request with specified error code | |
770 | * @evt: ibmvfc event struct | |
771 | * @error_code: error code to fail request with | |
772 | * | |
773 | * Return value: | |
774 | * none | |
775 | **/ | |
776 | static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) | |
777 | { | |
778 | if (evt->cmnd) { | |
779 | evt->cmnd->result = (error_code << 16); | |
780 | evt->done = ibmvfc_scsi_eh_done; | |
781 | } else | |
782 | evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; | |
783 | ||
784 | list_del(&evt->queue); | |
785 | del_timer(&evt->timer); | |
786 | ibmvfc_trc_end(evt); | |
787 | evt->done(evt); | |
788 | } | |
789 | ||
790 | /** | |
791 | * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests | |
792 | * @vhost: ibmvfc host struct | |
793 | * @error_code: error code to fail requests with | |
794 | * | |
795 | * Return value: | |
796 | * none | |
797 | **/ | |
798 | static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) | |
799 | { | |
800 | struct ibmvfc_event *evt, *pos; | |
801 | ||
802 | ibmvfc_dbg(vhost, "Purging all requests\n"); | |
803 | list_for_each_entry_safe(evt, pos, &vhost->sent, queue) | |
804 | ibmvfc_fail_request(evt, error_code); | |
805 | } | |
806 | ||
807 | /** | |
808 | * __ibmvfc_reset_host - Reset the connection to the server (no locking) | |
809 | * @vhost: struct ibmvfc host to reset | |
810 | **/ | |
811 | static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) | |
812 | { | |
813 | int rc; | |
814 | ||
815 | scsi_block_requests(vhost->host); | |
816 | ibmvfc_purge_requests(vhost, DID_ERROR); | |
817 | if ((rc = ibmvfc_reset_crq(vhost)) || | |
818 | (rc = ibmvfc_send_crq_init(vhost)) || | |
819 | (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { | |
820 | dev_err(vhost->dev, "Error after reset rc=%d\n", rc); | |
821 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
822 | } else | |
823 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
824 | } | |
825 | ||
826 | /** | |
827 | * ibmvfc_reset_host - Reset the connection to the server | |
828 | * @vhost: struct ibmvfc host to reset | |
829 | **/ | |
830 | static void ibmvfc_reset_host(struct ibmvfc_host *vhost) | |
831 | { | |
832 | unsigned long flags; | |
833 | ||
834 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
835 | __ibmvfc_reset_host(vhost); | |
836 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
837 | } | |
838 | ||
839 | /** | |
840 | * ibmvfc_retry_host_init - Retry host initialization if allowed | |
841 | * @vhost: ibmvfc host struct | |
842 | * | |
843 | **/ | |
844 | static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost) | |
845 | { | |
846 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { | |
847 | if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) { | |
848 | dev_err(vhost->dev, | |
849 | "Host initialization retries exceeded. Taking adapter offline\n"); | |
850 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); | |
851 | } else if (vhost->init_retries == IBMVFC_MAX_INIT_RETRIES) | |
852 | __ibmvfc_reset_host(vhost); | |
853 | else | |
854 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); | |
855 | } | |
856 | ||
857 | wake_up(&vhost->work_wait_q); | |
858 | } | |
859 | ||
860 | /** | |
b3c10489 | 861 | * __ibmvfc_get_target - Find the specified scsi_target (no locking) |
072b91f9 BK |
862 | * @starget: scsi target struct |
863 | * | |
864 | * Return value: | |
865 | * ibmvfc_target struct / NULL if not found | |
866 | **/ | |
b3c10489 | 867 | static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) |
072b91f9 BK |
868 | { |
869 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
870 | struct ibmvfc_host *vhost = shost_priv(shost); | |
871 | struct ibmvfc_target *tgt; | |
872 | ||
873 | list_for_each_entry(tgt, &vhost->targets, queue) | |
b3c10489 BK |
874 | if (tgt->target_id == starget->id) { |
875 | kref_get(&tgt->kref); | |
072b91f9 | 876 | return tgt; |
b3c10489 | 877 | } |
072b91f9 BK |
878 | return NULL; |
879 | } | |
880 | ||
881 | /** | |
b3c10489 | 882 | * ibmvfc_get_target - Find the specified scsi_target |
072b91f9 BK |
883 | * @starget: scsi target struct |
884 | * | |
885 | * Return value: | |
886 | * ibmvfc_target struct / NULL if not found | |
887 | **/ | |
b3c10489 | 888 | static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) |
072b91f9 BK |
889 | { |
890 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
891 | struct ibmvfc_target *tgt; | |
892 | unsigned long flags; | |
893 | ||
894 | spin_lock_irqsave(shost->host_lock, flags); | |
b3c10489 | 895 | tgt = __ibmvfc_get_target(starget); |
072b91f9 BK |
896 | spin_unlock_irqrestore(shost->host_lock, flags); |
897 | return tgt; | |
898 | } | |
899 | ||
900 | /** | |
901 | * ibmvfc_get_host_speed - Get host port speed | |
902 | * @shost: scsi host struct | |
903 | * | |
904 | * Return value: | |
905 | * none | |
906 | **/ | |
907 | static void ibmvfc_get_host_speed(struct Scsi_Host *shost) | |
908 | { | |
909 | struct ibmvfc_host *vhost = shost_priv(shost); | |
910 | unsigned long flags; | |
911 | ||
912 | spin_lock_irqsave(shost->host_lock, flags); | |
913 | if (vhost->state == IBMVFC_ACTIVE) { | |
914 | switch (vhost->login_buf->resp.link_speed / 100) { | |
915 | case 1: | |
916 | fc_host_speed(shost) = FC_PORTSPEED_1GBIT; | |
917 | break; | |
918 | case 2: | |
919 | fc_host_speed(shost) = FC_PORTSPEED_2GBIT; | |
920 | break; | |
921 | case 4: | |
922 | fc_host_speed(shost) = FC_PORTSPEED_4GBIT; | |
923 | break; | |
924 | case 8: | |
925 | fc_host_speed(shost) = FC_PORTSPEED_8GBIT; | |
926 | break; | |
927 | case 10: | |
928 | fc_host_speed(shost) = FC_PORTSPEED_10GBIT; | |
929 | break; | |
930 | case 16: | |
931 | fc_host_speed(shost) = FC_PORTSPEED_16GBIT; | |
932 | break; | |
933 | default: | |
934 | ibmvfc_log(vhost, 3, "Unknown port speed: %ld Gbit\n", | |
935 | vhost->login_buf->resp.link_speed / 100); | |
936 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; | |
937 | break; | |
938 | } | |
939 | } else | |
940 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; | |
941 | spin_unlock_irqrestore(shost->host_lock, flags); | |
942 | } | |
943 | ||
944 | /** | |
945 | * ibmvfc_get_host_port_state - Get host port state | |
946 | * @shost: scsi host struct | |
947 | * | |
948 | * Return value: | |
949 | * none | |
950 | **/ | |
951 | static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) | |
952 | { | |
953 | struct ibmvfc_host *vhost = shost_priv(shost); | |
954 | unsigned long flags; | |
955 | ||
956 | spin_lock_irqsave(shost->host_lock, flags); | |
957 | switch (vhost->state) { | |
958 | case IBMVFC_INITIALIZING: | |
959 | case IBMVFC_ACTIVE: | |
960 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
961 | break; | |
962 | case IBMVFC_LINK_DOWN: | |
963 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
964 | break; | |
965 | case IBMVFC_LINK_DEAD: | |
966 | case IBMVFC_HOST_OFFLINE: | |
967 | fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; | |
968 | break; | |
969 | case IBMVFC_HALTED: | |
970 | fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; | |
971 | break; | |
0ae808e0 BK |
972 | case IBMVFC_NO_CRQ: |
973 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
974 | break; | |
072b91f9 BK |
975 | default: |
976 | ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); | |
977 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
978 | break; | |
979 | } | |
980 | spin_unlock_irqrestore(shost->host_lock, flags); | |
981 | } | |
982 | ||
983 | /** | |
984 | * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout | |
985 | * @rport: rport struct | |
986 | * @timeout: timeout value | |
987 | * | |
988 | * Return value: | |
989 | * none | |
990 | **/ | |
991 | static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) | |
992 | { | |
993 | if (timeout) | |
994 | rport->dev_loss_tmo = timeout; | |
995 | else | |
996 | rport->dev_loss_tmo = 1; | |
997 | } | |
998 | ||
b3c10489 BK |
999 | /** |
1000 | * ibmvfc_release_tgt - Free memory allocated for a target | |
1001 | * @kref: kref struct | |
1002 | * | |
1003 | **/ | |
1004 | static void ibmvfc_release_tgt(struct kref *kref) | |
1005 | { | |
1006 | struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); | |
1007 | kfree(tgt); | |
1008 | } | |
1009 | ||
072b91f9 BK |
1010 | /** |
1011 | * ibmvfc_get_starget_node_name - Get SCSI target's node name | |
1012 | * @starget: scsi target struct | |
1013 | * | |
1014 | * Return value: | |
1015 | * none | |
1016 | **/ | |
1017 | static void ibmvfc_get_starget_node_name(struct scsi_target *starget) | |
1018 | { | |
b3c10489 | 1019 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1020 | fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; |
b3c10489 BK |
1021 | if (tgt) |
1022 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1023 | } |
1024 | ||
1025 | /** | |
1026 | * ibmvfc_get_starget_port_name - Get SCSI target's port name | |
1027 | * @starget: scsi target struct | |
1028 | * | |
1029 | * Return value: | |
1030 | * none | |
1031 | **/ | |
1032 | static void ibmvfc_get_starget_port_name(struct scsi_target *starget) | |
1033 | { | |
b3c10489 | 1034 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1035 | fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; |
b3c10489 BK |
1036 | if (tgt) |
1037 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1038 | } |
1039 | ||
1040 | /** | |
1041 | * ibmvfc_get_starget_port_id - Get SCSI target's port ID | |
1042 | * @starget: scsi target struct | |
1043 | * | |
1044 | * Return value: | |
1045 | * none | |
1046 | **/ | |
1047 | static void ibmvfc_get_starget_port_id(struct scsi_target *starget) | |
1048 | { | |
b3c10489 | 1049 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1050 | fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; |
b3c10489 BK |
1051 | if (tgt) |
1052 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1053 | } |
1054 | ||
1055 | /** | |
1056 | * ibmvfc_wait_while_resetting - Wait while the host resets | |
1057 | * @vhost: ibmvfc host struct | |
1058 | * | |
1059 | * Return value: | |
1060 | * 0 on success / other on failure | |
1061 | **/ | |
1062 | static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) | |
1063 | { | |
1064 | long timeout = wait_event_timeout(vhost->init_wait_q, | |
3eddc569 BK |
1065 | ((vhost->state == IBMVFC_ACTIVE || |
1066 | vhost->state == IBMVFC_HOST_OFFLINE || | |
1067 | vhost->state == IBMVFC_LINK_DEAD) && | |
1068 | vhost->action == IBMVFC_HOST_ACTION_NONE), | |
072b91f9 BK |
1069 | (init_timeout * HZ)); |
1070 | ||
1071 | return timeout ? 0 : -EIO; | |
1072 | } | |
1073 | ||
1074 | /** | |
1075 | * ibmvfc_issue_fc_host_lip - Re-initiate link initialization | |
1076 | * @shost: scsi host struct | |
1077 | * | |
1078 | * Return value: | |
1079 | * 0 on success / other on failure | |
1080 | **/ | |
1081 | static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) | |
1082 | { | |
1083 | struct ibmvfc_host *vhost = shost_priv(shost); | |
1084 | ||
1085 | dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); | |
1086 | ibmvfc_reset_host(vhost); | |
1087 | return ibmvfc_wait_while_resetting(vhost); | |
1088 | } | |
1089 | ||
1090 | /** | |
1091 | * ibmvfc_gather_partition_info - Gather info about the LPAR | |
1092 | * | |
1093 | * Return value: | |
1094 | * none | |
1095 | **/ | |
1096 | static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) | |
1097 | { | |
1098 | struct device_node *rootdn; | |
1099 | const char *name; | |
1100 | const unsigned int *num; | |
1101 | ||
1102 | rootdn = of_find_node_by_path("/"); | |
1103 | if (!rootdn) | |
1104 | return; | |
1105 | ||
1106 | name = of_get_property(rootdn, "ibm,partition-name", NULL); | |
1107 | if (name) | |
1108 | strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); | |
1109 | num = of_get_property(rootdn, "ibm,partition-no", NULL); | |
1110 | if (num) | |
1111 | vhost->partition_number = *num; | |
1112 | of_node_put(rootdn); | |
1113 | } | |
1114 | ||
1115 | /** | |
1116 | * ibmvfc_set_login_info - Setup info for NPIV login | |
1117 | * @vhost: ibmvfc host struct | |
1118 | * | |
1119 | * Return value: | |
1120 | * none | |
1121 | **/ | |
1122 | static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) | |
1123 | { | |
1124 | struct ibmvfc_npiv_login *login_info = &vhost->login_info; | |
1125 | struct device_node *of_node = vhost->dev->archdata.of_node; | |
1126 | const char *location; | |
1127 | ||
1128 | memset(login_info, 0, sizeof(*login_info)); | |
1129 | ||
1130 | login_info->ostype = IBMVFC_OS_LINUX; | |
1131 | login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; | |
1132 | login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); | |
1133 | login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); | |
1134 | login_info->partition_num = vhost->partition_number; | |
1135 | login_info->vfc_frame_version = 1; | |
1136 | login_info->fcp_version = 3; | |
1137 | if (vhost->client_migrated) | |
1138 | login_info->flags = IBMVFC_CLIENT_MIGRATED; | |
1139 | ||
1140 | login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; | |
1141 | login_info->capabilities = IBMVFC_CAN_MIGRATE; | |
1142 | login_info->async.va = vhost->async_crq.msg_token; | |
52d7e861 | 1143 | login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); |
072b91f9 BK |
1144 | strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); |
1145 | strncpy(login_info->device_name, | |
1146 | vhost->host->shost_gendev.bus_id, IBMVFC_MAX_NAME); | |
1147 | ||
1148 | location = of_get_property(of_node, "ibm,loc-code", NULL); | |
1149 | location = location ? location : vhost->dev->bus_id; | |
1150 | strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); | |
1151 | } | |
1152 | ||
1153 | /** | |
1154 | * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host | |
1155 | * @vhost: ibmvfc host who owns the event pool | |
1156 | * | |
1157 | * Returns zero on success. | |
1158 | **/ | |
1159 | static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) | |
1160 | { | |
1161 | int i; | |
1162 | struct ibmvfc_event_pool *pool = &vhost->pool; | |
1163 | ||
1164 | ENTER; | |
1165 | pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; | |
1166 | pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); | |
1167 | if (!pool->events) | |
1168 | return -ENOMEM; | |
1169 | ||
1170 | pool->iu_storage = dma_alloc_coherent(vhost->dev, | |
1171 | pool->size * sizeof(*pool->iu_storage), | |
1172 | &pool->iu_token, 0); | |
1173 | ||
1174 | if (!pool->iu_storage) { | |
1175 | kfree(pool->events); | |
1176 | return -ENOMEM; | |
1177 | } | |
1178 | ||
1179 | for (i = 0; i < pool->size; ++i) { | |
1180 | struct ibmvfc_event *evt = &pool->events[i]; | |
1181 | atomic_set(&evt->free, 1); | |
1182 | evt->crq.valid = 0x80; | |
1183 | evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); | |
1184 | evt->xfer_iu = pool->iu_storage + i; | |
1185 | evt->vhost = vhost; | |
1186 | evt->ext_list = NULL; | |
1187 | list_add_tail(&evt->queue, &vhost->free); | |
1188 | } | |
1189 | ||
1190 | LEAVE; | |
1191 | return 0; | |
1192 | } | |
1193 | ||
1194 | /** | |
1195 | * ibmvfc_free_event_pool - Frees memory of the event pool of a host | |
1196 | * @vhost: ibmvfc host who owns the event pool | |
1197 | * | |
1198 | **/ | |
1199 | static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) | |
1200 | { | |
1201 | int i; | |
1202 | struct ibmvfc_event_pool *pool = &vhost->pool; | |
1203 | ||
1204 | ENTER; | |
1205 | for (i = 0; i < pool->size; ++i) { | |
1206 | list_del(&pool->events[i].queue); | |
1207 | BUG_ON(atomic_read(&pool->events[i].free) != 1); | |
1208 | if (pool->events[i].ext_list) | |
1209 | dma_pool_free(vhost->sg_pool, | |
1210 | pool->events[i].ext_list, | |
1211 | pool->events[i].ext_list_token); | |
1212 | } | |
1213 | ||
1214 | kfree(pool->events); | |
1215 | dma_free_coherent(vhost->dev, | |
1216 | pool->size * sizeof(*pool->iu_storage), | |
1217 | pool->iu_storage, pool->iu_token); | |
1218 | LEAVE; | |
1219 | } | |
1220 | ||
1221 | /** | |
1222 | * ibmvfc_get_event - Gets the next free event in pool | |
1223 | * @vhost: ibmvfc host struct | |
1224 | * | |
1225 | * Returns a free event from the pool. | |
1226 | **/ | |
1227 | static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) | |
1228 | { | |
1229 | struct ibmvfc_event *evt; | |
1230 | ||
1231 | BUG_ON(list_empty(&vhost->free)); | |
1232 | evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); | |
1233 | atomic_set(&evt->free, 0); | |
1234 | list_del(&evt->queue); | |
1235 | return evt; | |
1236 | } | |
1237 | ||
1238 | /** | |
1239 | * ibmvfc_init_event - Initialize fields in an event struct that are always | |
1240 | * required. | |
1241 | * @evt: The event | |
1242 | * @done: Routine to call when the event is responded to | |
1243 | * @format: SRP or MAD format | |
1244 | **/ | |
1245 | static void ibmvfc_init_event(struct ibmvfc_event *evt, | |
1246 | void (*done) (struct ibmvfc_event *), u8 format) | |
1247 | { | |
1248 | evt->cmnd = NULL; | |
1249 | evt->sync_iu = NULL; | |
1250 | evt->crq.format = format; | |
1251 | evt->done = done; | |
ad8dcffa | 1252 | evt->eh_comp = NULL; |
072b91f9 BK |
1253 | } |
1254 | ||
1255 | /** | |
1256 | * ibmvfc_map_sg_list - Initialize scatterlist | |
1257 | * @scmd: scsi command struct | |
1258 | * @nseg: number of scatterlist segments | |
1259 | * @md: memory descriptor list to initialize | |
1260 | **/ | |
1261 | static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, | |
1262 | struct srp_direct_buf *md) | |
1263 | { | |
1264 | int i; | |
1265 | struct scatterlist *sg; | |
1266 | ||
1267 | scsi_for_each_sg(scmd, sg, nseg, i) { | |
1268 | md[i].va = sg_dma_address(sg); | |
1269 | md[i].len = sg_dma_len(sg); | |
1270 | md[i].key = 0; | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | /** | |
1275 | * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields | |
1276 | * @scmd: Scsi_Cmnd with the scatterlist | |
1277 | * @evt: ibmvfc event struct | |
1278 | * @vfc_cmd: vfc_cmd that contains the memory descriptor | |
1279 | * @dev: device for which to map dma memory | |
1280 | * | |
1281 | * Returns: | |
1282 | * 0 on success / non-zero on failure | |
1283 | **/ | |
1284 | static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, | |
1285 | struct ibmvfc_event *evt, | |
1286 | struct ibmvfc_cmd *vfc_cmd, struct device *dev) | |
1287 | { | |
1288 | ||
1289 | int sg_mapped; | |
1290 | struct srp_direct_buf *data = &vfc_cmd->ioba; | |
1291 | struct ibmvfc_host *vhost = dev_get_drvdata(dev); | |
1292 | ||
1293 | sg_mapped = scsi_dma_map(scmd); | |
1294 | if (!sg_mapped) { | |
1295 | vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; | |
1296 | return 0; | |
1297 | } else if (unlikely(sg_mapped < 0)) { | |
1298 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1299 | scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); | |
1300 | return sg_mapped; | |
1301 | } | |
1302 | ||
1303 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { | |
1304 | vfc_cmd->flags |= IBMVFC_WRITE; | |
1305 | vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; | |
1306 | } else { | |
1307 | vfc_cmd->flags |= IBMVFC_READ; | |
1308 | vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; | |
1309 | } | |
1310 | ||
1311 | if (sg_mapped == 1) { | |
1312 | ibmvfc_map_sg_list(scmd, sg_mapped, data); | |
1313 | return 0; | |
1314 | } | |
1315 | ||
1316 | vfc_cmd->flags |= IBMVFC_SCATTERLIST; | |
1317 | ||
1318 | if (!evt->ext_list) { | |
1319 | evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, | |
1320 | &evt->ext_list_token); | |
1321 | ||
1322 | if (!evt->ext_list) { | |
1323 | scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); | |
1324 | return -ENOMEM; | |
1325 | } | |
1326 | } | |
1327 | ||
1328 | ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); | |
1329 | ||
1330 | data->va = evt->ext_list_token; | |
1331 | data->len = sg_mapped * sizeof(struct srp_direct_buf); | |
1332 | data->key = 0; | |
1333 | return 0; | |
1334 | } | |
1335 | ||
1336 | /** | |
1337 | * ibmvfc_timeout - Internal command timeout handler | |
1338 | * @evt: struct ibmvfc_event that timed out | |
1339 | * | |
1340 | * Called when an internally generated command times out | |
1341 | **/ | |
1342 | static void ibmvfc_timeout(struct ibmvfc_event *evt) | |
1343 | { | |
1344 | struct ibmvfc_host *vhost = evt->vhost; | |
1345 | dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); | |
1346 | ibmvfc_reset_host(vhost); | |
1347 | } | |
1348 | ||
1349 | /** | |
1350 | * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() | |
1351 | * @evt: event to be sent | |
1352 | * @vhost: ibmvfc host struct | |
1353 | * @timeout: timeout in seconds - 0 means do not time command | |
1354 | * | |
1355 | * Returns the value returned from ibmvfc_send_crq(). (Zero for success) | |
1356 | **/ | |
1357 | static int ibmvfc_send_event(struct ibmvfc_event *evt, | |
1358 | struct ibmvfc_host *vhost, unsigned long timeout) | |
1359 | { | |
1360 | u64 *crq_as_u64 = (u64 *) &evt->crq; | |
1361 | int rc; | |
1362 | ||
1363 | /* Copy the IU into the transfer area */ | |
1364 | *evt->xfer_iu = evt->iu; | |
1365 | if (evt->crq.format == IBMVFC_CMD_FORMAT) | |
1366 | evt->xfer_iu->cmd.tag = (u64)evt; | |
1367 | else if (evt->crq.format == IBMVFC_MAD_FORMAT) | |
1368 | evt->xfer_iu->mad_common.tag = (u64)evt; | |
1369 | else | |
1370 | BUG(); | |
1371 | ||
1372 | list_add_tail(&evt->queue, &vhost->sent); | |
1373 | init_timer(&evt->timer); | |
1374 | ||
1375 | if (timeout) { | |
1376 | evt->timer.data = (unsigned long) evt; | |
1377 | evt->timer.expires = jiffies + (timeout * HZ); | |
1378 | evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; | |
1379 | add_timer(&evt->timer); | |
1380 | } | |
1381 | ||
1382 | if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { | |
1383 | list_del(&evt->queue); | |
1384 | del_timer(&evt->timer); | |
1385 | ||
1386 | /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. | |
1387 | * Firmware will send a CRQ with a transport event (0xFF) to | |
1388 | * tell this client what has happened to the transport. This | |
1389 | * will be handled in ibmvfc_handle_crq() | |
1390 | */ | |
1391 | if (rc == H_CLOSED) { | |
1392 | if (printk_ratelimit()) | |
1393 | dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); | |
1394 | if (evt->cmnd) | |
1395 | scsi_dma_unmap(evt->cmnd); | |
1396 | ibmvfc_free_event(evt); | |
1397 | return SCSI_MLQUEUE_HOST_BUSY; | |
1398 | } | |
1399 | ||
1400 | dev_err(vhost->dev, "Send error (rc=%d)\n", rc); | |
1401 | if (evt->cmnd) { | |
1402 | evt->cmnd->result = DID_ERROR << 16; | |
1403 | evt->done = ibmvfc_scsi_eh_done; | |
1404 | } else | |
1405 | evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; | |
1406 | ||
1407 | evt->done(evt); | |
1408 | } else | |
1409 | ibmvfc_trc_start(evt); | |
1410 | ||
1411 | return 0; | |
1412 | } | |
1413 | ||
1414 | /** | |
1415 | * ibmvfc_log_error - Log an error for the failed command if appropriate | |
1416 | * @evt: ibmvfc event to log | |
1417 | * | |
1418 | **/ | |
1419 | static void ibmvfc_log_error(struct ibmvfc_event *evt) | |
1420 | { | |
1421 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
1422 | struct ibmvfc_host *vhost = evt->vhost; | |
1423 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; | |
1424 | struct scsi_cmnd *cmnd = evt->cmnd; | |
1425 | const char *err = unknown_error; | |
1426 | int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); | |
1427 | int logerr = 0; | |
1428 | int rsp_code = 0; | |
1429 | ||
1430 | if (index >= 0) { | |
1431 | logerr = cmd_status[index].log; | |
1432 | err = cmd_status[index].name; | |
1433 | } | |
1434 | ||
0ae808e0 | 1435 | if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) |
072b91f9 BK |
1436 | return; |
1437 | ||
1438 | if (rsp->flags & FCP_RSP_LEN_VALID) | |
1439 | rsp_code = rsp->data.info.rsp_code; | |
1440 | ||
1441 | scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " | |
1442 | "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", | |
1443 | cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, | |
1444 | rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); | |
1445 | } | |
1446 | ||
1447 | /** | |
1448 | * ibmvfc_scsi_done - Handle responses from commands | |
1449 | * @evt: ibmvfc event to be handled | |
1450 | * | |
1451 | * Used as a callback when sending scsi cmds. | |
1452 | **/ | |
1453 | static void ibmvfc_scsi_done(struct ibmvfc_event *evt) | |
1454 | { | |
1455 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
1456 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; | |
1457 | struct scsi_cmnd *cmnd = evt->cmnd; | |
2bac406d BK |
1458 | u32 rsp_len = 0; |
1459 | u32 sense_len = rsp->fcp_sense_len; | |
072b91f9 BK |
1460 | |
1461 | if (cmnd) { | |
1462 | if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) | |
1463 | scsi_set_resid(cmnd, vfc_cmd->adapter_resid); | |
1464 | else if (rsp->flags & FCP_RESID_UNDER) | |
1465 | scsi_set_resid(cmnd, rsp->fcp_resid); | |
1466 | else | |
1467 | scsi_set_resid(cmnd, 0); | |
1468 | ||
1469 | if (vfc_cmd->status) { | |
1470 | cmnd->result = ibmvfc_get_err_result(vfc_cmd); | |
1471 | ||
1472 | if (rsp->flags & FCP_RSP_LEN_VALID) | |
1473 | rsp_len = rsp->fcp_rsp_len; | |
1474 | if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) | |
1475 | sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; | |
2bac406d | 1476 | if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) |
072b91f9 BK |
1477 | memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); |
1478 | ||
50119dad BK |
1479 | if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) |
1480 | cmnd->result = (DID_ERROR << 16); | |
1481 | ||
072b91f9 BK |
1482 | ibmvfc_log_error(evt); |
1483 | } | |
1484 | ||
1485 | if (!cmnd->result && | |
1486 | (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) | |
1487 | cmnd->result = (DID_ERROR << 16); | |
1488 | ||
1489 | scsi_dma_unmap(cmnd); | |
1490 | cmnd->scsi_done(cmnd); | |
1491 | } | |
1492 | ||
ad8dcffa BK |
1493 | if (evt->eh_comp) |
1494 | complete(evt->eh_comp); | |
1495 | ||
072b91f9 BK |
1496 | ibmvfc_free_event(evt); |
1497 | } | |
1498 | ||
1499 | /** | |
1500 | * ibmvfc_host_chkready - Check if the host can accept commands | |
1501 | * @vhost: struct ibmvfc host | |
1502 | * | |
1503 | * Returns: | |
1504 | * 1 if host can accept command / 0 if not | |
1505 | **/ | |
1506 | static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) | |
1507 | { | |
1508 | int result = 0; | |
1509 | ||
1510 | switch (vhost->state) { | |
1511 | case IBMVFC_LINK_DEAD: | |
1512 | case IBMVFC_HOST_OFFLINE: | |
1513 | result = DID_NO_CONNECT << 16; | |
1514 | break; | |
1515 | case IBMVFC_NO_CRQ: | |
1516 | case IBMVFC_INITIALIZING: | |
1517 | case IBMVFC_HALTED: | |
1518 | case IBMVFC_LINK_DOWN: | |
1519 | result = DID_REQUEUE << 16; | |
1520 | break; | |
1521 | case IBMVFC_ACTIVE: | |
1522 | result = 0; | |
1523 | break; | |
1524 | }; | |
1525 | ||
1526 | return result; | |
1527 | } | |
1528 | ||
1529 | /** | |
1530 | * ibmvfc_queuecommand - The queuecommand function of the scsi template | |
1531 | * @cmnd: struct scsi_cmnd to be executed | |
1532 | * @done: Callback function to be called when cmnd is completed | |
1533 | * | |
1534 | * Returns: | |
1535 | * 0 on success / other on failure | |
1536 | **/ | |
1537 | static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, | |
1538 | void (*done) (struct scsi_cmnd *)) | |
1539 | { | |
1540 | struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); | |
1541 | struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); | |
1542 | struct ibmvfc_cmd *vfc_cmd; | |
1543 | struct ibmvfc_event *evt; | |
1544 | u8 tag[2]; | |
1545 | int rc; | |
1546 | ||
1547 | if (unlikely((rc = fc_remote_port_chkready(rport))) || | |
1548 | unlikely((rc = ibmvfc_host_chkready(vhost)))) { | |
1549 | cmnd->result = rc; | |
1550 | done(cmnd); | |
1551 | return 0; | |
1552 | } | |
1553 | ||
1554 | cmnd->result = (DID_OK << 16); | |
1555 | evt = ibmvfc_get_event(vhost); | |
1556 | ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); | |
1557 | evt->cmnd = cmnd; | |
1558 | cmnd->scsi_done = done; | |
1559 | vfc_cmd = &evt->iu.cmd; | |
1560 | memset(vfc_cmd, 0, sizeof(*vfc_cmd)); | |
1561 | vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); | |
1562 | vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); | |
1563 | vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; | |
1564 | vfc_cmd->payload_len = sizeof(vfc_cmd->iu); | |
1565 | vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); | |
1566 | vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; | |
1567 | vfc_cmd->tgt_scsi_id = rport->port_id; | |
1568 | if ((rport->supported_classes & FC_COS_CLASS3) && | |
1569 | (fc_host_supported_classes(vhost->host) & FC_COS_CLASS3)) | |
1570 | vfc_cmd->flags = IBMVFC_CLASS_3_ERR; | |
1571 | vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); | |
1572 | int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); | |
1573 | memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); | |
1574 | ||
1575 | if (scsi_populate_tag_msg(cmnd, tag)) { | |
1576 | vfc_cmd->task_tag = tag[1]; | |
1577 | switch (tag[0]) { | |
1578 | case MSG_SIMPLE_TAG: | |
1579 | vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; | |
1580 | break; | |
1581 | case MSG_HEAD_TAG: | |
1582 | vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; | |
1583 | break; | |
1584 | case MSG_ORDERED_TAG: | |
1585 | vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; | |
1586 | break; | |
1587 | }; | |
1588 | } | |
1589 | ||
1590 | if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) | |
1591 | return ibmvfc_send_event(evt, vhost, 0); | |
1592 | ||
1593 | ibmvfc_free_event(evt); | |
1594 | if (rc == -ENOMEM) | |
1595 | return SCSI_MLQUEUE_HOST_BUSY; | |
1596 | ||
1597 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1598 | scmd_printk(KERN_ERR, cmnd, | |
1599 | "Failed to map DMA buffer for command. rc=%d\n", rc); | |
1600 | ||
1601 | cmnd->result = DID_ERROR << 16; | |
1602 | done(cmnd); | |
1603 | return 0; | |
1604 | } | |
1605 | ||
1606 | /** | |
1607 | * ibmvfc_sync_completion - Signal that a synchronous command has completed | |
1608 | * @evt: ibmvfc event struct | |
1609 | * | |
1610 | **/ | |
1611 | static void ibmvfc_sync_completion(struct ibmvfc_event *evt) | |
1612 | { | |
1613 | /* copy the response back */ | |
1614 | if (evt->sync_iu) | |
1615 | *evt->sync_iu = *evt->xfer_iu; | |
1616 | ||
1617 | complete(&evt->comp); | |
1618 | } | |
1619 | ||
1620 | /** | |
1621 | * ibmvfc_reset_device - Reset the device with the specified reset type | |
1622 | * @sdev: scsi device to reset | |
1623 | * @type: reset type | |
1624 | * @desc: reset type description for log messages | |
1625 | * | |
1626 | * Returns: | |
1627 | * 0 on success / other on failure | |
1628 | **/ | |
1629 | static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) | |
1630 | { | |
1631 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
1632 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
1633 | struct ibmvfc_cmd *tmf; | |
50ed9a00 | 1634 | struct ibmvfc_event *evt = NULL; |
072b91f9 BK |
1635 | union ibmvfc_iu rsp_iu; |
1636 | struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; | |
1637 | int rsp_rc = -EBUSY; | |
1638 | unsigned long flags; | |
1639 | int rsp_code = 0; | |
1640 | ||
1641 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1642 | if (vhost->state == IBMVFC_ACTIVE) { | |
1643 | evt = ibmvfc_get_event(vhost); | |
1644 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); | |
1645 | ||
1646 | tmf = &evt->iu.cmd; | |
1647 | memset(tmf, 0, sizeof(*tmf)); | |
1648 | tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); | |
1649 | tmf->resp.len = sizeof(tmf->rsp); | |
1650 | tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; | |
1651 | tmf->payload_len = sizeof(tmf->iu); | |
1652 | tmf->resp_len = sizeof(tmf->rsp); | |
1653 | tmf->cancel_key = (unsigned long)sdev->hostdata; | |
1654 | tmf->tgt_scsi_id = rport->port_id; | |
1655 | int_to_scsilun(sdev->lun, &tmf->iu.lun); | |
1656 | tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); | |
1657 | tmf->iu.tmf_flags = type; | |
1658 | evt->sync_iu = &rsp_iu; | |
1659 | ||
1660 | init_completion(&evt->comp); | |
1661 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
1662 | } | |
1663 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1664 | ||
1665 | if (rsp_rc != 0) { | |
1666 | sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", | |
1667 | desc, rsp_rc); | |
1668 | return -EIO; | |
1669 | } | |
1670 | ||
1671 | sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); | |
1672 | wait_for_completion(&evt->comp); | |
1673 | ||
1674 | if (rsp_iu.cmd.status) { | |
1675 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) | |
1676 | rsp_code = fc_rsp->data.info.rsp_code; | |
1677 | ||
1678 | sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " | |
1679 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", | |
1680 | desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), | |
1681 | rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, | |
1682 | fc_rsp->scsi_status); | |
1683 | rsp_rc = -EIO; | |
1684 | } else | |
1685 | sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); | |
1686 | ||
1687 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1688 | ibmvfc_free_event(evt); | |
1689 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1690 | return rsp_rc; | |
1691 | } | |
1692 | ||
1693 | /** | |
1694 | * ibmvfc_abort_task_set - Abort outstanding commands to the device | |
1695 | * @sdev: scsi device to abort commands | |
1696 | * | |
1697 | * This sends an Abort Task Set to the VIOS for the specified device. This does | |
1698 | * NOT send any cancel to the VIOS. That must be done separately. | |
1699 | * | |
1700 | * Returns: | |
1701 | * 0 on success / other on failure | |
1702 | **/ | |
1703 | static int ibmvfc_abort_task_set(struct scsi_device *sdev) | |
1704 | { | |
1705 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
1706 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
1707 | struct ibmvfc_cmd *tmf; | |
1708 | struct ibmvfc_event *evt, *found_evt; | |
1709 | union ibmvfc_iu rsp_iu; | |
1710 | struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; | |
1711 | int rsp_rc = -EBUSY; | |
1712 | unsigned long flags; | |
1713 | int rsp_code = 0; | |
1714 | ||
1715 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1716 | found_evt = NULL; | |
1717 | list_for_each_entry(evt, &vhost->sent, queue) { | |
1718 | if (evt->cmnd && evt->cmnd->device == sdev) { | |
1719 | found_evt = evt; | |
1720 | break; | |
1721 | } | |
1722 | } | |
1723 | ||
1724 | if (!found_evt) { | |
1725 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1726 | sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); | |
1727 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1728 | return 0; | |
1729 | } | |
1730 | ||
1731 | if (vhost->state == IBMVFC_ACTIVE) { | |
1732 | evt = ibmvfc_get_event(vhost); | |
1733 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); | |
1734 | ||
1735 | tmf = &evt->iu.cmd; | |
1736 | memset(tmf, 0, sizeof(*tmf)); | |
1737 | tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); | |
1738 | tmf->resp.len = sizeof(tmf->rsp); | |
1739 | tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; | |
1740 | tmf->payload_len = sizeof(tmf->iu); | |
1741 | tmf->resp_len = sizeof(tmf->rsp); | |
1742 | tmf->cancel_key = (unsigned long)sdev->hostdata; | |
1743 | tmf->tgt_scsi_id = rport->port_id; | |
1744 | int_to_scsilun(sdev->lun, &tmf->iu.lun); | |
1745 | tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); | |
1746 | tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; | |
1747 | evt->sync_iu = &rsp_iu; | |
1748 | ||
1749 | init_completion(&evt->comp); | |
1750 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
1751 | } | |
1752 | ||
1753 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1754 | ||
1755 | if (rsp_rc != 0) { | |
1756 | sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); | |
1757 | return -EIO; | |
1758 | } | |
1759 | ||
1760 | sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); | |
1761 | wait_for_completion(&evt->comp); | |
1762 | ||
1763 | if (rsp_iu.cmd.status) { | |
1764 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) | |
1765 | rsp_code = fc_rsp->data.info.rsp_code; | |
1766 | ||
1767 | sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " | |
1768 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", | |
1769 | ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), | |
1770 | rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, | |
1771 | fc_rsp->scsi_status); | |
1772 | rsp_rc = -EIO; | |
1773 | } else | |
1774 | sdev_printk(KERN_INFO, sdev, "Abort successful\n"); | |
1775 | ||
1776 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1777 | ibmvfc_free_event(evt); | |
1778 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1779 | return rsp_rc; | |
1780 | } | |
1781 | ||
1782 | /** | |
1783 | * ibmvfc_cancel_all - Cancel all outstanding commands to the device | |
1784 | * @sdev: scsi device to cancel commands | |
1785 | * @type: type of error recovery being performed | |
1786 | * | |
1787 | * This sends a cancel to the VIOS for the specified device. This does | |
1788 | * NOT send any abort to the actual device. That must be done separately. | |
1789 | * | |
1790 | * Returns: | |
1791 | * 0 on success / other on failure | |
1792 | **/ | |
1793 | static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) | |
1794 | { | |
1795 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
ad8dcffa BK |
1796 | struct scsi_target *starget = scsi_target(sdev); |
1797 | struct fc_rport *rport = starget_to_rport(starget); | |
072b91f9 BK |
1798 | struct ibmvfc_tmf *tmf; |
1799 | struct ibmvfc_event *evt, *found_evt; | |
1800 | union ibmvfc_iu rsp; | |
1801 | int rsp_rc = -EBUSY; | |
1802 | unsigned long flags; | |
1803 | u16 status; | |
1804 | ||
1805 | ENTER; | |
1806 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1807 | found_evt = NULL; | |
1808 | list_for_each_entry(evt, &vhost->sent, queue) { | |
1809 | if (evt->cmnd && evt->cmnd->device == sdev) { | |
1810 | found_evt = evt; | |
1811 | break; | |
1812 | } | |
1813 | } | |
1814 | ||
1815 | if (!found_evt) { | |
1816 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1817 | sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); | |
1818 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1819 | return 0; | |
1820 | } | |
1821 | ||
1822 | if (vhost->state == IBMVFC_ACTIVE) { | |
1823 | evt = ibmvfc_get_event(vhost); | |
1824 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); | |
1825 | ||
1826 | tmf = &evt->iu.tmf; | |
1827 | memset(tmf, 0, sizeof(*tmf)); | |
1828 | tmf->common.version = 1; | |
1829 | tmf->common.opcode = IBMVFC_TMF_MAD; | |
1830 | tmf->common.length = sizeof(*tmf); | |
1831 | tmf->scsi_id = rport->port_id; | |
1832 | int_to_scsilun(sdev->lun, &tmf->lun); | |
1833 | tmf->flags = (type | IBMVFC_TMF_LUA_VALID); | |
1834 | tmf->cancel_key = (unsigned long)sdev->hostdata; | |
ad8dcffa | 1835 | tmf->my_cancel_key = (unsigned long)starget->hostdata; |
072b91f9 BK |
1836 | |
1837 | evt->sync_iu = &rsp; | |
1838 | init_completion(&evt->comp); | |
1839 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
1840 | } | |
1841 | ||
1842 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1843 | ||
1844 | if (rsp_rc != 0) { | |
1845 | sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); | |
1846 | return -EIO; | |
1847 | } | |
1848 | ||
1849 | sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); | |
1850 | ||
1851 | wait_for_completion(&evt->comp); | |
1852 | status = rsp.mad_common.status; | |
1853 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1854 | ibmvfc_free_event(evt); | |
1855 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1856 | ||
1857 | if (status != IBMVFC_MAD_SUCCESS) { | |
1858 | sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); | |
1859 | return -EIO; | |
1860 | } | |
1861 | ||
1862 | sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); | |
1863 | return 0; | |
1864 | } | |
1865 | ||
ad8dcffa BK |
1866 | /** |
1867 | * ibmvfc_match_target - Match function for specified target | |
1868 | * @evt: ibmvfc event struct | |
1869 | * @device: device to match (starget) | |
1870 | * | |
1871 | * Returns: | |
1872 | * 1 if event matches starget / 0 if event does not match starget | |
1873 | **/ | |
1874 | static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) | |
1875 | { | |
1876 | if (evt->cmnd && scsi_target(evt->cmnd->device) == device) | |
1877 | return 1; | |
1878 | return 0; | |
1879 | } | |
1880 | ||
1881 | /** | |
1882 | * ibmvfc_match_lun - Match function for specified LUN | |
1883 | * @evt: ibmvfc event struct | |
1884 | * @device: device to match (sdev) | |
1885 | * | |
1886 | * Returns: | |
1887 | * 1 if event matches sdev / 0 if event does not match sdev | |
1888 | **/ | |
1889 | static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) | |
1890 | { | |
1891 | if (evt->cmnd && evt->cmnd->device == device) | |
1892 | return 1; | |
1893 | return 0; | |
1894 | } | |
1895 | ||
1896 | /** | |
1897 | * ibmvfc_wait_for_ops - Wait for ops to complete | |
1898 | * @vhost: ibmvfc host struct | |
1899 | * @device: device to match (starget or sdev) | |
1900 | * @match: match function | |
1901 | * | |
1902 | * Returns: | |
1903 | * SUCCESS / FAILED | |
1904 | **/ | |
1905 | static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, | |
1906 | int (*match) (struct ibmvfc_event *, void *)) | |
1907 | { | |
1908 | struct ibmvfc_event *evt; | |
1909 | DECLARE_COMPLETION_ONSTACK(comp); | |
1910 | int wait; | |
1911 | unsigned long flags; | |
1912 | signed long timeout = init_timeout * HZ; | |
1913 | ||
1914 | ENTER; | |
1915 | do { | |
1916 | wait = 0; | |
1917 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1918 | list_for_each_entry(evt, &vhost->sent, queue) { | |
1919 | if (match(evt, device)) { | |
1920 | evt->eh_comp = ∁ | |
1921 | wait++; | |
1922 | } | |
1923 | } | |
1924 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1925 | ||
1926 | if (wait) { | |
1927 | timeout = wait_for_completion_timeout(&comp, timeout); | |
1928 | ||
1929 | if (!timeout) { | |
1930 | wait = 0; | |
1931 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1932 | list_for_each_entry(evt, &vhost->sent, queue) { | |
1933 | if (match(evt, device)) { | |
1934 | evt->eh_comp = NULL; | |
1935 | wait++; | |
1936 | } | |
1937 | } | |
1938 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1939 | if (wait) | |
1940 | dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); | |
1941 | LEAVE; | |
1942 | return wait ? FAILED : SUCCESS; | |
1943 | } | |
1944 | } | |
1945 | } while (wait); | |
1946 | ||
1947 | LEAVE; | |
1948 | return SUCCESS; | |
1949 | } | |
1950 | ||
072b91f9 BK |
1951 | /** |
1952 | * ibmvfc_eh_abort_handler - Abort a command | |
1953 | * @cmd: scsi command to abort | |
1954 | * | |
1955 | * Returns: | |
1956 | * SUCCESS / FAILED | |
1957 | **/ | |
1958 | static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) | |
1959 | { | |
ad8dcffa BK |
1960 | struct scsi_device *sdev = cmd->device; |
1961 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
072b91f9 | 1962 | int cancel_rc, abort_rc; |
ad8dcffa | 1963 | int rc = FAILED; |
072b91f9 BK |
1964 | |
1965 | ENTER; | |
1966 | ibmvfc_wait_while_resetting(vhost); | |
ad8dcffa BK |
1967 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); |
1968 | abort_rc = ibmvfc_abort_task_set(sdev); | |
072b91f9 | 1969 | |
ad8dcffa BK |
1970 | if (!cancel_rc && !abort_rc) |
1971 | rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); | |
072b91f9 BK |
1972 | |
1973 | LEAVE; | |
ad8dcffa | 1974 | return rc; |
072b91f9 BK |
1975 | } |
1976 | ||
1977 | /** | |
1978 | * ibmvfc_eh_device_reset_handler - Reset a single LUN | |
1979 | * @cmd: scsi command struct | |
1980 | * | |
1981 | * Returns: | |
1982 | * SUCCESS / FAILED | |
1983 | **/ | |
1984 | static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) | |
1985 | { | |
ad8dcffa BK |
1986 | struct scsi_device *sdev = cmd->device; |
1987 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
072b91f9 | 1988 | int cancel_rc, reset_rc; |
ad8dcffa | 1989 | int rc = FAILED; |
072b91f9 BK |
1990 | |
1991 | ENTER; | |
1992 | ibmvfc_wait_while_resetting(vhost); | |
ad8dcffa BK |
1993 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); |
1994 | reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); | |
072b91f9 | 1995 | |
ad8dcffa BK |
1996 | if (!cancel_rc && !reset_rc) |
1997 | rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); | |
072b91f9 BK |
1998 | |
1999 | LEAVE; | |
ad8dcffa | 2000 | return rc; |
072b91f9 BK |
2001 | } |
2002 | ||
2003 | /** | |
2004 | * ibmvfc_dev_cancel_all - Device iterated cancel all function | |
2005 | * @sdev: scsi device struct | |
2006 | * @data: return code | |
2007 | * | |
2008 | **/ | |
2009 | static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data) | |
2010 | { | |
2011 | unsigned long *rc = data; | |
2012 | *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); | |
2013 | } | |
2014 | ||
2015 | /** | |
2016 | * ibmvfc_dev_abort_all - Device iterated abort task set function | |
2017 | * @sdev: scsi device struct | |
2018 | * @data: return code | |
2019 | * | |
2020 | **/ | |
2021 | static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) | |
2022 | { | |
2023 | unsigned long *rc = data; | |
2024 | *rc |= ibmvfc_abort_task_set(sdev); | |
2025 | } | |
2026 | ||
2027 | /** | |
2028 | * ibmvfc_eh_target_reset_handler - Reset the target | |
2029 | * @cmd: scsi command struct | |
2030 | * | |
2031 | * Returns: | |
2032 | * SUCCESS / FAILED | |
2033 | **/ | |
2034 | static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) | |
2035 | { | |
ad8dcffa BK |
2036 | struct scsi_device *sdev = cmd->device; |
2037 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
2038 | struct scsi_target *starget = scsi_target(sdev); | |
072b91f9 | 2039 | int reset_rc; |
ad8dcffa | 2040 | int rc = FAILED; |
072b91f9 | 2041 | unsigned long cancel_rc = 0; |
072b91f9 BK |
2042 | |
2043 | ENTER; | |
2044 | ibmvfc_wait_while_resetting(vhost); | |
2045 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); | |
ad8dcffa | 2046 | reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); |
072b91f9 | 2047 | |
ad8dcffa BK |
2048 | if (!cancel_rc && !reset_rc) |
2049 | rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); | |
072b91f9 BK |
2050 | |
2051 | LEAVE; | |
ad8dcffa | 2052 | return rc; |
072b91f9 BK |
2053 | } |
2054 | ||
2055 | /** | |
2056 | * ibmvfc_eh_host_reset_handler - Reset the connection to the server | |
2057 | * @cmd: struct scsi_cmnd having problems | |
2058 | * | |
2059 | **/ | |
2060 | static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) | |
2061 | { | |
2062 | int rc; | |
2063 | struct ibmvfc_host *vhost = shost_priv(cmd->device->host); | |
2064 | ||
2065 | dev_err(vhost->dev, "Resetting connection due to error recovery\n"); | |
2066 | rc = ibmvfc_issue_fc_host_lip(vhost->host); | |
2067 | return rc ? FAILED : SUCCESS; | |
2068 | } | |
2069 | ||
2070 | /** | |
2071 | * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. | |
2072 | * @rport: rport struct | |
2073 | * | |
2074 | * Return value: | |
2075 | * none | |
2076 | **/ | |
2077 | static void ibmvfc_terminate_rport_io(struct fc_rport *rport) | |
2078 | { | |
2079 | struct scsi_target *starget = to_scsi_target(&rport->dev); | |
2080 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2081 | struct ibmvfc_host *vhost = shost_priv(shost); | |
072b91f9 BK |
2082 | unsigned long cancel_rc = 0; |
2083 | unsigned long abort_rc = 0; | |
ad8dcffa | 2084 | int rc = FAILED; |
072b91f9 BK |
2085 | |
2086 | ENTER; | |
2087 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); | |
2088 | starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); | |
2089 | ||
ad8dcffa BK |
2090 | if (!cancel_rc && !abort_rc) |
2091 | rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); | |
2092 | ||
2093 | if (rc == FAILED) | |
072b91f9 | 2094 | ibmvfc_issue_fc_host_lip(shost); |
072b91f9 BK |
2095 | LEAVE; |
2096 | } | |
2097 | ||
2098 | static const struct { | |
2099 | enum ibmvfc_async_event ae; | |
2100 | const char *desc; | |
2101 | } ae_desc [] = { | |
2102 | { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, | |
2103 | { IBMVFC_AE_ELS_LOGO, "LOGO" }, | |
2104 | { IBMVFC_AE_ELS_PRLO, "PRLO" }, | |
2105 | { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, | |
2106 | { IBMVFC_AE_SCN_GROUP, "Group SCN" }, | |
2107 | { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, | |
2108 | { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, | |
2109 | { IBMVFC_AE_LINK_UP, "Link Up" }, | |
2110 | { IBMVFC_AE_LINK_DOWN, "Link Down" }, | |
2111 | { IBMVFC_AE_LINK_DEAD, "Link Dead" }, | |
2112 | { IBMVFC_AE_HALT, "Halt" }, | |
2113 | { IBMVFC_AE_RESUME, "Resume" }, | |
2114 | { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, | |
2115 | }; | |
2116 | ||
2117 | static const char *unknown_ae = "Unknown async"; | |
2118 | ||
2119 | /** | |
2120 | * ibmvfc_get_ae_desc - Get text description for async event | |
2121 | * @ae: async event | |
2122 | * | |
2123 | **/ | |
2124 | static const char *ibmvfc_get_ae_desc(u64 ae) | |
2125 | { | |
2126 | int i; | |
2127 | ||
2128 | for (i = 0; i < ARRAY_SIZE(ae_desc); i++) | |
2129 | if (ae_desc[i].ae == ae) | |
2130 | return ae_desc[i].desc; | |
2131 | ||
2132 | return unknown_ae; | |
2133 | } | |
2134 | ||
2135 | /** | |
2136 | * ibmvfc_handle_async - Handle an async event from the adapter | |
2137 | * @crq: crq to process | |
2138 | * @vhost: ibmvfc host struct | |
2139 | * | |
2140 | **/ | |
2141 | static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, | |
2142 | struct ibmvfc_host *vhost) | |
2143 | { | |
2144 | const char *desc = ibmvfc_get_ae_desc(crq->event); | |
2145 | ||
3e339946 BK |
2146 | ibmvfc_log(vhost, 3, "%s event received. scsi_id: %lx, wwpn: %lx," |
2147 | " node_name: %lx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name); | |
072b91f9 BK |
2148 | |
2149 | switch (crq->event) { | |
2150 | case IBMVFC_AE_LINK_UP: | |
2151 | case IBMVFC_AE_RESUME: | |
2152 | vhost->events_to_log |= IBMVFC_AE_LINKUP; | |
cf6f10d7 | 2153 | ibmvfc_init_host(vhost, 1); |
072b91f9 BK |
2154 | break; |
2155 | case IBMVFC_AE_SCN_FABRIC: | |
2156 | vhost->events_to_log |= IBMVFC_AE_RSCN; | |
cf6f10d7 | 2157 | ibmvfc_init_host(vhost, 1); |
072b91f9 BK |
2158 | break; |
2159 | case IBMVFC_AE_SCN_NPORT: | |
2160 | case IBMVFC_AE_SCN_GROUP: | |
2161 | case IBMVFC_AE_SCN_DOMAIN: | |
2162 | vhost->events_to_log |= IBMVFC_AE_RSCN; | |
2163 | case IBMVFC_AE_ELS_LOGO: | |
2164 | case IBMVFC_AE_ELS_PRLO: | |
2165 | case IBMVFC_AE_ELS_PLOGI: | |
2166 | ibmvfc_reinit_host(vhost); | |
2167 | break; | |
2168 | case IBMVFC_AE_LINK_DOWN: | |
2169 | case IBMVFC_AE_ADAPTER_FAILED: | |
2170 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
2171 | break; | |
2172 | case IBMVFC_AE_LINK_DEAD: | |
2173 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
2174 | break; | |
2175 | case IBMVFC_AE_HALT: | |
2176 | ibmvfc_link_down(vhost, IBMVFC_HALTED); | |
2177 | break; | |
2178 | default: | |
2179 | dev_err(vhost->dev, "Unknown async event received: %ld\n", crq->event); | |
2180 | break; | |
2181 | }; | |
2182 | } | |
2183 | ||
2184 | /** | |
2185 | * ibmvfc_handle_crq - Handles and frees received events in the CRQ | |
2186 | * @crq: Command/Response queue | |
2187 | * @vhost: ibmvfc host struct | |
2188 | * | |
2189 | **/ | |
2190 | static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) | |
2191 | { | |
2192 | long rc; | |
2193 | struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; | |
2194 | ||
2195 | switch (crq->valid) { | |
2196 | case IBMVFC_CRQ_INIT_RSP: | |
2197 | switch (crq->format) { | |
2198 | case IBMVFC_CRQ_INIT: | |
2199 | dev_info(vhost->dev, "Partner initialized\n"); | |
2200 | /* Send back a response */ | |
2201 | rc = ibmvfc_send_crq_init_complete(vhost); | |
2202 | if (rc == 0) | |
cf6f10d7 | 2203 | ibmvfc_init_host(vhost, 0); |
072b91f9 BK |
2204 | else |
2205 | dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); | |
2206 | break; | |
2207 | case IBMVFC_CRQ_INIT_COMPLETE: | |
2208 | dev_info(vhost->dev, "Partner initialization complete\n"); | |
cf6f10d7 | 2209 | ibmvfc_init_host(vhost, 0); |
072b91f9 BK |
2210 | break; |
2211 | default: | |
2212 | dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); | |
2213 | } | |
2214 | return; | |
2215 | case IBMVFC_CRQ_XPORT_EVENT: | |
2216 | vhost->state = IBMVFC_NO_CRQ; | |
2217 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); | |
2218 | if (crq->format == IBMVFC_PARTITION_MIGRATED) { | |
2219 | /* We need to re-setup the interpartition connection */ | |
2220 | dev_info(vhost->dev, "Re-enabling adapter\n"); | |
2221 | vhost->client_migrated = 1; | |
2222 | ibmvfc_purge_requests(vhost, DID_REQUEUE); | |
2223 | if ((rc = ibmvfc_reenable_crq_queue(vhost)) || | |
2224 | (rc = ibmvfc_send_crq_init(vhost))) { | |
2225 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
2226 | dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); | |
2227 | } else | |
2228 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
2229 | } else { | |
2230 | dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); | |
2231 | ||
2232 | ibmvfc_purge_requests(vhost, DID_ERROR); | |
2233 | if ((rc = ibmvfc_reset_crq(vhost)) || | |
2234 | (rc = ibmvfc_send_crq_init(vhost))) { | |
2235 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
2236 | dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); | |
2237 | } else | |
2238 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
2239 | } | |
2240 | return; | |
2241 | case IBMVFC_CRQ_CMD_RSP: | |
2242 | break; | |
2243 | default: | |
2244 | dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); | |
2245 | return; | |
2246 | } | |
2247 | ||
2248 | if (crq->format == IBMVFC_ASYNC_EVENT) | |
2249 | return; | |
2250 | ||
2251 | /* The only kind of payload CRQs we should get are responses to | |
2252 | * things we send. Make sure this response is to something we | |
2253 | * actually sent | |
2254 | */ | |
2255 | if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { | |
2256 | dev_err(vhost->dev, "Returned correlation_token 0x%08lx is invalid!\n", | |
2257 | crq->ioba); | |
2258 | return; | |
2259 | } | |
2260 | ||
2261 | if (unlikely(atomic_read(&evt->free))) { | |
2262 | dev_err(vhost->dev, "Received duplicate correlation_token 0x%08lx!\n", | |
2263 | crq->ioba); | |
2264 | return; | |
2265 | } | |
2266 | ||
2267 | del_timer(&evt->timer); | |
2268 | list_del(&evt->queue); | |
2269 | ibmvfc_trc_end(evt); | |
2270 | evt->done(evt); | |
2271 | } | |
2272 | ||
2273 | /** | |
2274 | * ibmvfc_scan_finished - Check if the device scan is done. | |
2275 | * @shost: scsi host struct | |
2276 | * @time: current elapsed time | |
2277 | * | |
2278 | * Returns: | |
2279 | * 0 if scan is not done / 1 if scan is done | |
2280 | **/ | |
2281 | static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) | |
2282 | { | |
2283 | unsigned long flags; | |
2284 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2285 | int done = 0; | |
2286 | ||
2287 | spin_lock_irqsave(shost->host_lock, flags); | |
2288 | if (time >= (init_timeout * HZ)) { | |
2289 | dev_info(vhost->dev, "Scan taking longer than %d seconds, " | |
2290 | "continuing initialization\n", init_timeout); | |
2291 | done = 1; | |
2292 | } | |
2293 | ||
2294 | if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE) | |
2295 | done = 1; | |
2296 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2297 | return done; | |
2298 | } | |
2299 | ||
2300 | /** | |
2301 | * ibmvfc_slave_alloc - Setup the device's task set value | |
2302 | * @sdev: struct scsi_device device to configure | |
2303 | * | |
2304 | * Set the device's task set value so that error handling works as | |
2305 | * expected. | |
2306 | * | |
2307 | * Returns: | |
2308 | * 0 on success / -ENXIO if device does not exist | |
2309 | **/ | |
2310 | static int ibmvfc_slave_alloc(struct scsi_device *sdev) | |
2311 | { | |
2312 | struct Scsi_Host *shost = sdev->host; | |
2313 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
2314 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2315 | unsigned long flags = 0; | |
2316 | ||
2317 | if (!rport || fc_remote_port_chkready(rport)) | |
2318 | return -ENXIO; | |
2319 | ||
2320 | spin_lock_irqsave(shost->host_lock, flags); | |
2321 | sdev->hostdata = (void *)(unsigned long)vhost->task_set++; | |
2322 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2323 | return 0; | |
2324 | } | |
2325 | ||
ad8dcffa BK |
2326 | /** |
2327 | * ibmvfc_target_alloc - Setup the target's task set value | |
2328 | * @starget: struct scsi_target | |
2329 | * | |
2330 | * Set the target's task set value so that error handling works as | |
2331 | * expected. | |
2332 | * | |
2333 | * Returns: | |
2334 | * 0 on success / -ENXIO if device does not exist | |
2335 | **/ | |
2336 | static int ibmvfc_target_alloc(struct scsi_target *starget) | |
2337 | { | |
2338 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2339 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2340 | unsigned long flags = 0; | |
2341 | ||
2342 | spin_lock_irqsave(shost->host_lock, flags); | |
2343 | starget->hostdata = (void *)(unsigned long)vhost->task_set++; | |
2344 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2345 | return 0; | |
2346 | } | |
2347 | ||
072b91f9 BK |
2348 | /** |
2349 | * ibmvfc_slave_configure - Configure the device | |
2350 | * @sdev: struct scsi_device device to configure | |
2351 | * | |
2352 | * Enable allow_restart for a device if it is a disk. Adjust the | |
2353 | * queue_depth here also. | |
2354 | * | |
2355 | * Returns: | |
2356 | * 0 | |
2357 | **/ | |
2358 | static int ibmvfc_slave_configure(struct scsi_device *sdev) | |
2359 | { | |
2360 | struct Scsi_Host *shost = sdev->host; | |
2361 | struct fc_rport *rport = starget_to_rport(sdev->sdev_target); | |
2362 | unsigned long flags = 0; | |
2363 | ||
2364 | spin_lock_irqsave(shost->host_lock, flags); | |
2365 | if (sdev->type == TYPE_DISK) | |
2366 | sdev->allow_restart = 1; | |
2367 | ||
2368 | if (sdev->tagged_supported) { | |
2369 | scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); | |
2370 | scsi_activate_tcq(sdev, sdev->queue_depth); | |
2371 | } else | |
2372 | scsi_deactivate_tcq(sdev, sdev->queue_depth); | |
2373 | ||
2374 | rport->dev_loss_tmo = dev_loss_tmo; | |
2375 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2376 | return 0; | |
2377 | } | |
2378 | ||
2379 | /** | |
2380 | * ibmvfc_change_queue_depth - Change the device's queue depth | |
2381 | * @sdev: scsi device struct | |
2382 | * @qdepth: depth to set | |
2383 | * | |
2384 | * Return value: | |
2385 | * actual depth set | |
2386 | **/ | |
2387 | static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) | |
2388 | { | |
2389 | if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) | |
2390 | qdepth = IBMVFC_MAX_CMDS_PER_LUN; | |
2391 | ||
2392 | scsi_adjust_queue_depth(sdev, 0, qdepth); | |
2393 | return sdev->queue_depth; | |
2394 | } | |
2395 | ||
2396 | /** | |
2397 | * ibmvfc_change_queue_type - Change the device's queue type | |
2398 | * @sdev: scsi device struct | |
2399 | * @tag_type: type of tags to use | |
2400 | * | |
2401 | * Return value: | |
2402 | * actual queue type set | |
2403 | **/ | |
2404 | static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) | |
2405 | { | |
2406 | if (sdev->tagged_supported) { | |
2407 | scsi_set_tag_type(sdev, tag_type); | |
2408 | ||
2409 | if (tag_type) | |
2410 | scsi_activate_tcq(sdev, sdev->queue_depth); | |
2411 | else | |
2412 | scsi_deactivate_tcq(sdev, sdev->queue_depth); | |
2413 | } else | |
2414 | tag_type = 0; | |
2415 | ||
2416 | return tag_type; | |
2417 | } | |
2418 | ||
2419 | static ssize_t ibmvfc_show_host_partition_name(struct device *dev, | |
2420 | struct device_attribute *attr, char *buf) | |
2421 | { | |
2422 | struct Scsi_Host *shost = class_to_shost(dev); | |
2423 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2424 | ||
2425 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2426 | vhost->login_buf->resp.partition_name); | |
2427 | } | |
2428 | ||
2429 | static struct device_attribute ibmvfc_host_partition_name = { | |
2430 | .attr = { | |
2431 | .name = "partition_name", | |
2432 | .mode = S_IRUGO, | |
2433 | }, | |
2434 | .show = ibmvfc_show_host_partition_name, | |
2435 | }; | |
2436 | ||
2437 | static ssize_t ibmvfc_show_host_device_name(struct device *dev, | |
2438 | struct device_attribute *attr, char *buf) | |
2439 | { | |
2440 | struct Scsi_Host *shost = class_to_shost(dev); | |
2441 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2442 | ||
2443 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2444 | vhost->login_buf->resp.device_name); | |
2445 | } | |
2446 | ||
2447 | static struct device_attribute ibmvfc_host_device_name = { | |
2448 | .attr = { | |
2449 | .name = "device_name", | |
2450 | .mode = S_IRUGO, | |
2451 | }, | |
2452 | .show = ibmvfc_show_host_device_name, | |
2453 | }; | |
2454 | ||
2455 | static ssize_t ibmvfc_show_host_loc_code(struct device *dev, | |
2456 | struct device_attribute *attr, char *buf) | |
2457 | { | |
2458 | struct Scsi_Host *shost = class_to_shost(dev); | |
2459 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2460 | ||
2461 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2462 | vhost->login_buf->resp.port_loc_code); | |
2463 | } | |
2464 | ||
2465 | static struct device_attribute ibmvfc_host_loc_code = { | |
2466 | .attr = { | |
2467 | .name = "port_loc_code", | |
2468 | .mode = S_IRUGO, | |
2469 | }, | |
2470 | .show = ibmvfc_show_host_loc_code, | |
2471 | }; | |
2472 | ||
2473 | static ssize_t ibmvfc_show_host_drc_name(struct device *dev, | |
2474 | struct device_attribute *attr, char *buf) | |
2475 | { | |
2476 | struct Scsi_Host *shost = class_to_shost(dev); | |
2477 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2478 | ||
2479 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2480 | vhost->login_buf->resp.drc_name); | |
2481 | } | |
2482 | ||
2483 | static struct device_attribute ibmvfc_host_drc_name = { | |
2484 | .attr = { | |
2485 | .name = "drc_name", | |
2486 | .mode = S_IRUGO, | |
2487 | }, | |
2488 | .show = ibmvfc_show_host_drc_name, | |
2489 | }; | |
2490 | ||
2491 | static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, | |
2492 | struct device_attribute *attr, char *buf) | |
2493 | { | |
2494 | struct Scsi_Host *shost = class_to_shost(dev); | |
2495 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2496 | return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); | |
2497 | } | |
2498 | ||
2499 | static struct device_attribute ibmvfc_host_npiv_version = { | |
2500 | .attr = { | |
2501 | .name = "npiv_version", | |
2502 | .mode = S_IRUGO, | |
2503 | }, | |
2504 | .show = ibmvfc_show_host_npiv_version, | |
2505 | }; | |
2506 | ||
2507 | /** | |
2508 | * ibmvfc_show_log_level - Show the adapter's error logging level | |
2509 | * @dev: class device struct | |
2510 | * @buf: buffer | |
2511 | * | |
2512 | * Return value: | |
2513 | * number of bytes printed to buffer | |
2514 | **/ | |
2515 | static ssize_t ibmvfc_show_log_level(struct device *dev, | |
2516 | struct device_attribute *attr, char *buf) | |
2517 | { | |
2518 | struct Scsi_Host *shost = class_to_shost(dev); | |
2519 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2520 | unsigned long flags = 0; | |
2521 | int len; | |
2522 | ||
2523 | spin_lock_irqsave(shost->host_lock, flags); | |
2524 | len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); | |
2525 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2526 | return len; | |
2527 | } | |
2528 | ||
2529 | /** | |
2530 | * ibmvfc_store_log_level - Change the adapter's error logging level | |
2531 | * @dev: class device struct | |
2532 | * @buf: buffer | |
2533 | * | |
2534 | * Return value: | |
2535 | * number of bytes printed to buffer | |
2536 | **/ | |
2537 | static ssize_t ibmvfc_store_log_level(struct device *dev, | |
2538 | struct device_attribute *attr, | |
2539 | const char *buf, size_t count) | |
2540 | { | |
2541 | struct Scsi_Host *shost = class_to_shost(dev); | |
2542 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2543 | unsigned long flags = 0; | |
2544 | ||
2545 | spin_lock_irqsave(shost->host_lock, flags); | |
2546 | vhost->log_level = simple_strtoul(buf, NULL, 10); | |
2547 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2548 | return strlen(buf); | |
2549 | } | |
2550 | ||
2551 | static struct device_attribute ibmvfc_log_level_attr = { | |
2552 | .attr = { | |
2553 | .name = "log_level", | |
2554 | .mode = S_IRUGO | S_IWUSR, | |
2555 | }, | |
2556 | .show = ibmvfc_show_log_level, | |
2557 | .store = ibmvfc_store_log_level | |
2558 | }; | |
2559 | ||
2560 | #ifdef CONFIG_SCSI_IBMVFC_TRACE | |
2561 | /** | |
2562 | * ibmvfc_read_trace - Dump the adapter trace | |
2563 | * @kobj: kobject struct | |
2564 | * @bin_attr: bin_attribute struct | |
2565 | * @buf: buffer | |
2566 | * @off: offset | |
2567 | * @count: buffer size | |
2568 | * | |
2569 | * Return value: | |
2570 | * number of bytes printed to buffer | |
2571 | **/ | |
2572 | static ssize_t ibmvfc_read_trace(struct kobject *kobj, | |
2573 | struct bin_attribute *bin_attr, | |
2574 | char *buf, loff_t off, size_t count) | |
2575 | { | |
2576 | struct device *dev = container_of(kobj, struct device, kobj); | |
2577 | struct Scsi_Host *shost = class_to_shost(dev); | |
2578 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2579 | unsigned long flags = 0; | |
2580 | int size = IBMVFC_TRACE_SIZE; | |
2581 | char *src = (char *)vhost->trace; | |
2582 | ||
2583 | if (off > size) | |
2584 | return 0; | |
2585 | if (off + count > size) { | |
2586 | size -= off; | |
2587 | count = size; | |
2588 | } | |
2589 | ||
2590 | spin_lock_irqsave(shost->host_lock, flags); | |
2591 | memcpy(buf, &src[off], count); | |
2592 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2593 | return count; | |
2594 | } | |
2595 | ||
2596 | static struct bin_attribute ibmvfc_trace_attr = { | |
2597 | .attr = { | |
2598 | .name = "trace", | |
2599 | .mode = S_IRUGO, | |
2600 | }, | |
2601 | .size = 0, | |
2602 | .read = ibmvfc_read_trace, | |
2603 | }; | |
2604 | #endif | |
2605 | ||
2606 | static struct device_attribute *ibmvfc_attrs[] = { | |
2607 | &ibmvfc_host_partition_name, | |
2608 | &ibmvfc_host_device_name, | |
2609 | &ibmvfc_host_loc_code, | |
2610 | &ibmvfc_host_drc_name, | |
2611 | &ibmvfc_host_npiv_version, | |
2612 | &ibmvfc_log_level_attr, | |
2613 | NULL | |
2614 | }; | |
2615 | ||
2616 | static struct scsi_host_template driver_template = { | |
2617 | .module = THIS_MODULE, | |
2618 | .name = "IBM POWER Virtual FC Adapter", | |
2619 | .proc_name = IBMVFC_NAME, | |
2620 | .queuecommand = ibmvfc_queuecommand, | |
2621 | .eh_abort_handler = ibmvfc_eh_abort_handler, | |
2622 | .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, | |
2623 | .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, | |
2624 | .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, | |
2625 | .slave_alloc = ibmvfc_slave_alloc, | |
2626 | .slave_configure = ibmvfc_slave_configure, | |
ad8dcffa | 2627 | .target_alloc = ibmvfc_target_alloc, |
072b91f9 BK |
2628 | .scan_finished = ibmvfc_scan_finished, |
2629 | .change_queue_depth = ibmvfc_change_queue_depth, | |
2630 | .change_queue_type = ibmvfc_change_queue_type, | |
2631 | .cmd_per_lun = 16, | |
2632 | .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, | |
2633 | .this_id = -1, | |
2634 | .sg_tablesize = SG_ALL, | |
2635 | .max_sectors = IBMVFC_MAX_SECTORS, | |
2636 | .use_clustering = ENABLE_CLUSTERING, | |
2637 | .shost_attrs = ibmvfc_attrs, | |
2638 | }; | |
2639 | ||
2640 | /** | |
2641 | * ibmvfc_next_async_crq - Returns the next entry in async queue | |
2642 | * @vhost: ibmvfc host struct | |
2643 | * | |
2644 | * Returns: | |
2645 | * Pointer to next entry in queue / NULL if empty | |
2646 | **/ | |
2647 | static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) | |
2648 | { | |
2649 | struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; | |
2650 | struct ibmvfc_async_crq *crq; | |
2651 | ||
2652 | crq = &async_crq->msgs[async_crq->cur]; | |
2653 | if (crq->valid & 0x80) { | |
2654 | if (++async_crq->cur == async_crq->size) | |
2655 | async_crq->cur = 0; | |
2656 | } else | |
2657 | crq = NULL; | |
2658 | ||
2659 | return crq; | |
2660 | } | |
2661 | ||
2662 | /** | |
2663 | * ibmvfc_next_crq - Returns the next entry in message queue | |
2664 | * @vhost: ibmvfc host struct | |
2665 | * | |
2666 | * Returns: | |
2667 | * Pointer to next entry in queue / NULL if empty | |
2668 | **/ | |
2669 | static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) | |
2670 | { | |
2671 | struct ibmvfc_crq_queue *queue = &vhost->crq; | |
2672 | struct ibmvfc_crq *crq; | |
2673 | ||
2674 | crq = &queue->msgs[queue->cur]; | |
2675 | if (crq->valid & 0x80) { | |
2676 | if (++queue->cur == queue->size) | |
2677 | queue->cur = 0; | |
2678 | } else | |
2679 | crq = NULL; | |
2680 | ||
2681 | return crq; | |
2682 | } | |
2683 | ||
2684 | /** | |
2685 | * ibmvfc_interrupt - Interrupt handler | |
2686 | * @irq: number of irq to handle, not used | |
2687 | * @dev_instance: ibmvfc_host that received interrupt | |
2688 | * | |
2689 | * Returns: | |
2690 | * IRQ_HANDLED | |
2691 | **/ | |
2692 | static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) | |
2693 | { | |
2694 | struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; | |
2695 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
2696 | struct ibmvfc_crq *crq; | |
2697 | struct ibmvfc_async_crq *async; | |
2698 | unsigned long flags; | |
2699 | int done = 0; | |
2700 | ||
2701 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2702 | vio_disable_interrupts(to_vio_dev(vhost->dev)); | |
2703 | while (!done) { | |
2704 | /* Pull all the valid messages off the CRQ */ | |
2705 | while ((crq = ibmvfc_next_crq(vhost)) != NULL) { | |
2706 | ibmvfc_handle_crq(crq, vhost); | |
2707 | crq->valid = 0; | |
2708 | } | |
2709 | ||
2710 | /* Pull all the valid messages off the async CRQ */ | |
2711 | while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { | |
2712 | ibmvfc_handle_async(async, vhost); | |
2713 | async->valid = 0; | |
2714 | } | |
2715 | ||
2716 | vio_enable_interrupts(vdev); | |
2717 | if ((crq = ibmvfc_next_crq(vhost)) != NULL) { | |
2718 | vio_disable_interrupts(vdev); | |
2719 | ibmvfc_handle_crq(crq, vhost); | |
2720 | crq->valid = 0; | |
2721 | } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { | |
2722 | vio_disable_interrupts(vdev); | |
2723 | ibmvfc_handle_async(async, vhost); | |
2724 | crq->valid = 0; | |
2725 | } else | |
2726 | done = 1; | |
2727 | } | |
2728 | ||
2729 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2730 | return IRQ_HANDLED; | |
2731 | } | |
2732 | ||
2733 | /** | |
2734 | * ibmvfc_init_tgt - Set the next init job step for the target | |
2735 | * @tgt: ibmvfc target struct | |
2736 | * @job_step: job step to perform | |
2737 | * | |
2738 | **/ | |
2739 | static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, | |
2740 | void (*job_step) (struct ibmvfc_target *)) | |
2741 | { | |
2742 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); | |
2743 | tgt->job_step = job_step; | |
2744 | wake_up(&tgt->vhost->work_wait_q); | |
2745 | } | |
2746 | ||
2747 | /** | |
2748 | * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization | |
2749 | * @tgt: ibmvfc target struct | |
2750 | * @job_step: initialization job step | |
2751 | * | |
2752 | **/ | |
2753 | static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, | |
2754 | void (*job_step) (struct ibmvfc_target *)) | |
2755 | { | |
2756 | if (++tgt->init_retries > IBMVFC_MAX_INIT_RETRIES) { | |
2757 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
2758 | wake_up(&tgt->vhost->work_wait_q); | |
2759 | } else | |
2760 | ibmvfc_init_tgt(tgt, job_step); | |
2761 | } | |
2762 | ||
072b91f9 BK |
2763 | /** |
2764 | * ibmvfc_tgt_prli_done - Completion handler for Process Login | |
2765 | * @evt: ibmvfc event struct | |
2766 | * | |
2767 | **/ | |
2768 | static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) | |
2769 | { | |
2770 | struct ibmvfc_target *tgt = evt->tgt; | |
2771 | struct ibmvfc_host *vhost = evt->vhost; | |
2772 | struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; | |
2773 | u32 status = rsp->common.status; | |
2774 | ||
2775 | vhost->discovery_threads--; | |
2776 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
2777 | switch (status) { | |
2778 | case IBMVFC_MAD_SUCCESS: | |
2779 | tgt_dbg(tgt, "Process Login succeeded\n"); | |
2780 | tgt->need_login = 0; | |
2781 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT); | |
2782 | break; | |
2783 | case IBMVFC_MAD_DRIVER_FAILED: | |
2784 | break; | |
2785 | case IBMVFC_MAD_CRQ_ERROR: | |
2786 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); | |
2787 | break; | |
2788 | case IBMVFC_MAD_FAILED: | |
2789 | default: | |
2790 | tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n", | |
2791 | ibmvfc_get_cmd_error(rsp->status, rsp->error), | |
2792 | rsp->status, rsp->error, status); | |
2793 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) | |
2794 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); | |
10e79499 BK |
2795 | else |
2796 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
072b91f9 BK |
2797 | break; |
2798 | }; | |
2799 | ||
2800 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
2801 | ibmvfc_free_event(evt); | |
2802 | wake_up(&vhost->work_wait_q); | |
2803 | } | |
2804 | ||
2805 | /** | |
2806 | * ibmvfc_tgt_send_prli - Send a process login | |
2807 | * @tgt: ibmvfc target struct | |
2808 | * | |
2809 | **/ | |
2810 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) | |
2811 | { | |
2812 | struct ibmvfc_process_login *prli; | |
2813 | struct ibmvfc_host *vhost = tgt->vhost; | |
2814 | struct ibmvfc_event *evt; | |
2815 | ||
2816 | if (vhost->discovery_threads >= disc_threads) | |
2817 | return; | |
2818 | ||
2819 | kref_get(&tgt->kref); | |
2820 | evt = ibmvfc_get_event(vhost); | |
2821 | vhost->discovery_threads++; | |
2822 | ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); | |
2823 | evt->tgt = tgt; | |
2824 | prli = &evt->iu.prli; | |
2825 | memset(prli, 0, sizeof(*prli)); | |
2826 | prli->common.version = 1; | |
2827 | prli->common.opcode = IBMVFC_PROCESS_LOGIN; | |
2828 | prli->common.length = sizeof(*prli); | |
2829 | prli->scsi_id = tgt->scsi_id; | |
2830 | ||
2831 | prli->parms.type = IBMVFC_SCSI_FCP_TYPE; | |
2832 | prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; | |
2833 | prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; | |
2834 | ||
2835 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
2836 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
2837 | vhost->discovery_threads--; | |
2838 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
2839 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
2840 | } else | |
2841 | tgt_dbg(tgt, "Sent process login\n"); | |
2842 | } | |
2843 | ||
2844 | /** | |
2845 | * ibmvfc_tgt_plogi_done - Completion handler for Port Login | |
2846 | * @evt: ibmvfc event struct | |
2847 | * | |
2848 | **/ | |
2849 | static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) | |
2850 | { | |
2851 | struct ibmvfc_target *tgt = evt->tgt; | |
2852 | struct ibmvfc_host *vhost = evt->vhost; | |
2853 | struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; | |
2854 | u32 status = rsp->common.status; | |
2855 | ||
2856 | vhost->discovery_threads--; | |
2857 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
2858 | switch (status) { | |
2859 | case IBMVFC_MAD_SUCCESS: | |
2860 | tgt_dbg(tgt, "Port Login succeeded\n"); | |
2861 | if (tgt->ids.port_name && | |
2862 | tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { | |
2863 | vhost->reinit = 1; | |
2864 | tgt_dbg(tgt, "Port re-init required\n"); | |
2865 | break; | |
2866 | } | |
2867 | tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); | |
2868 | tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); | |
2869 | tgt->ids.port_id = tgt->scsi_id; | |
2870 | tgt->ids.roles = FC_PORT_ROLE_FCP_TARGET; | |
2871 | memcpy(&tgt->service_parms, &rsp->service_parms, | |
2872 | sizeof(tgt->service_parms)); | |
2873 | memcpy(&tgt->service_parms_change, &rsp->service_parms_change, | |
2874 | sizeof(tgt->service_parms_change)); | |
2875 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); | |
2876 | break; | |
2877 | case IBMVFC_MAD_DRIVER_FAILED: | |
2878 | break; | |
2879 | case IBMVFC_MAD_CRQ_ERROR: | |
2880 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); | |
2881 | break; | |
2882 | case IBMVFC_MAD_FAILED: | |
2883 | default: | |
2884 | tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", | |
2885 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, | |
2886 | ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, | |
2887 | ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); | |
2888 | ||
2889 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) | |
2890 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); | |
10e79499 BK |
2891 | else |
2892 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
072b91f9 BK |
2893 | break; |
2894 | }; | |
2895 | ||
2896 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
2897 | ibmvfc_free_event(evt); | |
2898 | wake_up(&vhost->work_wait_q); | |
2899 | } | |
2900 | ||
2901 | /** | |
2902 | * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target | |
2903 | * @tgt: ibmvfc target struct | |
2904 | * | |
2905 | **/ | |
2906 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) | |
2907 | { | |
2908 | struct ibmvfc_port_login *plogi; | |
2909 | struct ibmvfc_host *vhost = tgt->vhost; | |
2910 | struct ibmvfc_event *evt; | |
2911 | ||
2912 | if (vhost->discovery_threads >= disc_threads) | |
2913 | return; | |
2914 | ||
2915 | kref_get(&tgt->kref); | |
2916 | evt = ibmvfc_get_event(vhost); | |
2917 | vhost->discovery_threads++; | |
2918 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
2919 | ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); | |
2920 | evt->tgt = tgt; | |
2921 | plogi = &evt->iu.plogi; | |
2922 | memset(plogi, 0, sizeof(*plogi)); | |
2923 | plogi->common.version = 1; | |
2924 | plogi->common.opcode = IBMVFC_PORT_LOGIN; | |
2925 | plogi->common.length = sizeof(*plogi); | |
2926 | plogi->scsi_id = tgt->scsi_id; | |
2927 | ||
2928 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
2929 | vhost->discovery_threads--; | |
2930 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
2931 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
2932 | } else | |
2933 | tgt_dbg(tgt, "Sent port login\n"); | |
2934 | } | |
2935 | ||
2936 | /** | |
2937 | * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD | |
2938 | * @evt: ibmvfc event struct | |
2939 | * | |
2940 | **/ | |
2941 | static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) | |
2942 | { | |
2943 | struct ibmvfc_target *tgt = evt->tgt; | |
2944 | struct ibmvfc_host *vhost = evt->vhost; | |
2945 | struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; | |
2946 | u32 status = rsp->common.status; | |
2947 | ||
2948 | vhost->discovery_threads--; | |
2949 | ibmvfc_free_event(evt); | |
2950 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
2951 | ||
2952 | switch (status) { | |
2953 | case IBMVFC_MAD_SUCCESS: | |
2954 | tgt_dbg(tgt, "Implicit Logout succeeded\n"); | |
2955 | break; | |
2956 | case IBMVFC_MAD_DRIVER_FAILED: | |
2957 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
2958 | wake_up(&vhost->work_wait_q); | |
2959 | return; | |
2960 | case IBMVFC_MAD_FAILED: | |
2961 | default: | |
2962 | tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); | |
2963 | break; | |
2964 | }; | |
2965 | ||
2966 | if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) | |
2967 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); | |
2968 | else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && | |
2969 | tgt->scsi_id != tgt->new_scsi_id) | |
2970 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
2971 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
2972 | wake_up(&vhost->work_wait_q); | |
2973 | } | |
2974 | ||
2975 | /** | |
2976 | * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target | |
2977 | * @tgt: ibmvfc target struct | |
2978 | * | |
2979 | **/ | |
2980 | static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) | |
2981 | { | |
2982 | struct ibmvfc_implicit_logout *mad; | |
2983 | struct ibmvfc_host *vhost = tgt->vhost; | |
2984 | struct ibmvfc_event *evt; | |
2985 | ||
2986 | if (vhost->discovery_threads >= disc_threads) | |
2987 | return; | |
2988 | ||
2989 | kref_get(&tgt->kref); | |
2990 | evt = ibmvfc_get_event(vhost); | |
2991 | vhost->discovery_threads++; | |
2992 | ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); | |
2993 | evt->tgt = tgt; | |
2994 | mad = &evt->iu.implicit_logout; | |
2995 | memset(mad, 0, sizeof(*mad)); | |
2996 | mad->common.version = 1; | |
2997 | mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; | |
2998 | mad->common.length = sizeof(*mad); | |
2999 | mad->old_scsi_id = tgt->scsi_id; | |
3000 | ||
3001 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
3002 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3003 | vhost->discovery_threads--; | |
3004 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3005 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3006 | } else | |
3007 | tgt_dbg(tgt, "Sent Implicit Logout\n"); | |
3008 | } | |
3009 | ||
989b8545 BK |
3010 | /** |
3011 | * ibmvfc_adisc_needs_plogi - Does device need PLOGI? | |
3012 | * @mad: ibmvfc passthru mad struct | |
3013 | * @tgt: ibmvfc target struct | |
3014 | * | |
3015 | * Returns: | |
3016 | * 1 if PLOGI needed / 0 if PLOGI not needed | |
3017 | **/ | |
3018 | static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, | |
3019 | struct ibmvfc_target *tgt) | |
3020 | { | |
3021 | if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, | |
3022 | sizeof(tgt->ids.port_name))) | |
3023 | return 1; | |
3024 | if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, | |
3025 | sizeof(tgt->ids.node_name))) | |
3026 | return 1; | |
3027 | if (mad->fc_iu.response[6] != tgt->scsi_id) | |
3028 | return 1; | |
3029 | return 0; | |
3030 | } | |
3031 | ||
3032 | /** | |
3033 | * ibmvfc_tgt_adisc_done - Completion handler for ADISC | |
3034 | * @evt: ibmvfc event struct | |
3035 | * | |
3036 | **/ | |
3037 | static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) | |
3038 | { | |
3039 | struct ibmvfc_target *tgt = evt->tgt; | |
3040 | struct ibmvfc_host *vhost = evt->vhost; | |
3041 | struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; | |
3042 | u32 status = mad->common.status; | |
3043 | u8 fc_reason, fc_explain; | |
3044 | ||
3045 | vhost->discovery_threads--; | |
3046 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3047 | ||
3048 | switch (status) { | |
3049 | case IBMVFC_MAD_SUCCESS: | |
3050 | tgt_dbg(tgt, "ADISC succeeded\n"); | |
3051 | if (ibmvfc_adisc_needs_plogi(mad, tgt)) | |
3052 | tgt->need_login = 1; | |
3053 | break; | |
3054 | case IBMVFC_MAD_DRIVER_FAILED: | |
3055 | break; | |
3056 | case IBMVFC_MAD_FAILED: | |
3057 | default: | |
3058 | tgt->need_login = 1; | |
3059 | fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; | |
3060 | fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; | |
3061 | tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", | |
3062 | ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), | |
3063 | mad->iu.status, mad->iu.error, | |
3064 | ibmvfc_get_fc_type(fc_reason), fc_reason, | |
3065 | ibmvfc_get_ls_explain(fc_explain), fc_explain, status); | |
3066 | break; | |
3067 | }; | |
3068 | ||
3069 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3070 | ibmvfc_free_event(evt); | |
3071 | wake_up(&vhost->work_wait_q); | |
3072 | } | |
3073 | ||
3074 | /** | |
3075 | * ibmvfc_init_passthru - Initialize an event struct for FC passthru | |
3076 | * @evt: ibmvfc event struct | |
3077 | * | |
3078 | **/ | |
3079 | static void ibmvfc_init_passthru(struct ibmvfc_event *evt) | |
3080 | { | |
3081 | struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; | |
3082 | ||
3083 | memset(mad, 0, sizeof(*mad)); | |
3084 | mad->common.version = 1; | |
3085 | mad->common.opcode = IBMVFC_PASSTHRU; | |
3086 | mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); | |
3087 | mad->cmd_ioba.va = (u64)evt->crq.ioba + | |
3088 | offsetof(struct ibmvfc_passthru_mad, iu); | |
3089 | mad->cmd_ioba.len = sizeof(mad->iu); | |
3090 | mad->iu.cmd_len = sizeof(mad->fc_iu.payload); | |
3091 | mad->iu.rsp_len = sizeof(mad->fc_iu.response); | |
3092 | mad->iu.cmd.va = (u64)evt->crq.ioba + | |
3093 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + | |
3094 | offsetof(struct ibmvfc_passthru_fc_iu, payload); | |
3095 | mad->iu.cmd.len = sizeof(mad->fc_iu.payload); | |
3096 | mad->iu.rsp.va = (u64)evt->crq.ioba + | |
3097 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + | |
3098 | offsetof(struct ibmvfc_passthru_fc_iu, response); | |
3099 | mad->iu.rsp.len = sizeof(mad->fc_iu.response); | |
3100 | } | |
3101 | ||
3102 | /** | |
3103 | * ibmvfc_tgt_adisc - Initiate an ADISC for specified target | |
3104 | * @tgt: ibmvfc target struct | |
3105 | * | |
3106 | **/ | |
3107 | static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) | |
3108 | { | |
3109 | struct ibmvfc_passthru_mad *mad; | |
3110 | struct ibmvfc_host *vhost = tgt->vhost; | |
3111 | struct ibmvfc_event *evt; | |
3112 | ||
3113 | if (vhost->discovery_threads >= disc_threads) | |
3114 | return; | |
3115 | ||
3116 | kref_get(&tgt->kref); | |
3117 | evt = ibmvfc_get_event(vhost); | |
3118 | vhost->discovery_threads++; | |
3119 | ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); | |
3120 | evt->tgt = tgt; | |
3121 | ||
3122 | ibmvfc_init_passthru(evt); | |
3123 | mad = &evt->iu.passthru; | |
3124 | mad->iu.flags = IBMVFC_FC_ELS; | |
3125 | mad->iu.scsi_id = tgt->scsi_id; | |
3126 | ||
3127 | mad->fc_iu.payload[0] = IBMVFC_ADISC; | |
3128 | memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, | |
3129 | sizeof(vhost->login_buf->resp.port_name)); | |
3130 | memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, | |
3131 | sizeof(vhost->login_buf->resp.node_name)); | |
3132 | mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; | |
3133 | ||
3134 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
3135 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3136 | vhost->discovery_threads--; | |
3137 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3138 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3139 | } else | |
3140 | tgt_dbg(tgt, "Sent ADISC\n"); | |
3141 | } | |
3142 | ||
072b91f9 BK |
3143 | /** |
3144 | * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD | |
3145 | * @evt: ibmvfc event struct | |
3146 | * | |
3147 | **/ | |
3148 | static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) | |
3149 | { | |
3150 | struct ibmvfc_target *tgt = evt->tgt; | |
3151 | struct ibmvfc_host *vhost = evt->vhost; | |
3152 | struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; | |
3153 | u32 status = rsp->common.status; | |
3154 | ||
3155 | vhost->discovery_threads--; | |
3156 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3157 | switch (status) { | |
3158 | case IBMVFC_MAD_SUCCESS: | |
3159 | tgt_dbg(tgt, "Query Target succeeded\n"); | |
3160 | tgt->new_scsi_id = rsp->scsi_id; | |
3161 | if (rsp->scsi_id != tgt->scsi_id) | |
3162 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); | |
989b8545 BK |
3163 | else |
3164 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); | |
072b91f9 BK |
3165 | break; |
3166 | case IBMVFC_MAD_DRIVER_FAILED: | |
3167 | break; | |
3168 | case IBMVFC_MAD_CRQ_ERROR: | |
3169 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); | |
3170 | break; | |
3171 | case IBMVFC_MAD_FAILED: | |
3172 | default: | |
3173 | tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", | |
3174 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, | |
3175 | ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, | |
3176 | ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); | |
3177 | ||
3178 | if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && | |
3179 | rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && | |
3180 | rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) | |
3181 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
3182 | else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) | |
3183 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); | |
10e79499 BK |
3184 | else |
3185 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
072b91f9 BK |
3186 | break; |
3187 | }; | |
3188 | ||
3189 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3190 | ibmvfc_free_event(evt); | |
3191 | wake_up(&vhost->work_wait_q); | |
3192 | } | |
3193 | ||
3194 | /** | |
3195 | * ibmvfc_tgt_query_target - Initiate a Query Target for specified target | |
3196 | * @tgt: ibmvfc target struct | |
3197 | * | |
3198 | **/ | |
3199 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) | |
3200 | { | |
3201 | struct ibmvfc_query_tgt *query_tgt; | |
3202 | struct ibmvfc_host *vhost = tgt->vhost; | |
3203 | struct ibmvfc_event *evt; | |
3204 | ||
3205 | if (vhost->discovery_threads >= disc_threads) | |
3206 | return; | |
3207 | ||
3208 | kref_get(&tgt->kref); | |
3209 | evt = ibmvfc_get_event(vhost); | |
3210 | vhost->discovery_threads++; | |
3211 | evt->tgt = tgt; | |
3212 | ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); | |
3213 | query_tgt = &evt->iu.query_tgt; | |
3214 | memset(query_tgt, 0, sizeof(*query_tgt)); | |
3215 | query_tgt->common.version = 1; | |
3216 | query_tgt->common.opcode = IBMVFC_QUERY_TARGET; | |
3217 | query_tgt->common.length = sizeof(*query_tgt); | |
3218 | query_tgt->wwpn = tgt->ids.port_name; | |
3219 | ||
3220 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
3221 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3222 | vhost->discovery_threads--; | |
3223 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3224 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3225 | } else | |
3226 | tgt_dbg(tgt, "Sent Query Target\n"); | |
3227 | } | |
3228 | ||
3229 | /** | |
3230 | * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target | |
3231 | * @vhost: ibmvfc host struct | |
3232 | * @scsi_id: SCSI ID to allocate target for | |
3233 | * | |
3234 | * Returns: | |
3235 | * 0 on success / other on failure | |
3236 | **/ | |
3237 | static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) | |
3238 | { | |
3239 | struct ibmvfc_target *tgt; | |
3240 | unsigned long flags; | |
3241 | ||
3242 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3243 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
3244 | if (tgt->scsi_id == scsi_id) { | |
3245 | if (tgt->need_login) | |
3246 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); | |
3247 | goto unlock_out; | |
3248 | } | |
3249 | } | |
3250 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3251 | ||
3252 | tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL); | |
3253 | if (!tgt) { | |
3254 | dev_err(vhost->dev, "Target allocation failure for scsi id %08lx\n", | |
3255 | scsi_id); | |
3256 | return -ENOMEM; | |
3257 | } | |
3258 | ||
3259 | tgt->scsi_id = scsi_id; | |
3260 | tgt->new_scsi_id = scsi_id; | |
3261 | tgt->vhost = vhost; | |
3262 | tgt->need_login = 1; | |
3263 | kref_init(&tgt->kref); | |
3264 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); | |
3265 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3266 | list_add_tail(&tgt->queue, &vhost->targets); | |
3267 | ||
3268 | unlock_out: | |
3269 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3270 | return 0; | |
3271 | } | |
3272 | ||
3273 | /** | |
3274 | * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets | |
3275 | * @vhost: ibmvfc host struct | |
3276 | * | |
3277 | * Returns: | |
3278 | * 0 on success / other on failure | |
3279 | **/ | |
3280 | static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) | |
3281 | { | |
3282 | int i, rc; | |
3283 | ||
3284 | for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) | |
3285 | rc = ibmvfc_alloc_target(vhost, | |
3286 | vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); | |
3287 | ||
3288 | return rc; | |
3289 | } | |
3290 | ||
3291 | /** | |
3292 | * ibmvfc_discover_targets_done - Completion handler for discover targets MAD | |
3293 | * @evt: ibmvfc event struct | |
3294 | * | |
3295 | **/ | |
3296 | static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) | |
3297 | { | |
3298 | struct ibmvfc_host *vhost = evt->vhost; | |
3299 | struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; | |
3300 | u32 mad_status = rsp->common.status; | |
3301 | ||
3302 | switch (mad_status) { | |
3303 | case IBMVFC_MAD_SUCCESS: | |
3304 | ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); | |
3305 | vhost->num_targets = rsp->num_written; | |
3306 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); | |
3307 | break; | |
3308 | case IBMVFC_MAD_FAILED: | |
3309 | dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n", | |
3310 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); | |
3311 | ibmvfc_retry_host_init(vhost); | |
3312 | break; | |
3313 | case IBMVFC_MAD_DRIVER_FAILED: | |
3314 | break; | |
3315 | default: | |
3316 | dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); | |
3317 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3318 | break; | |
3319 | } | |
3320 | ||
3321 | ibmvfc_free_event(evt); | |
3322 | wake_up(&vhost->work_wait_q); | |
3323 | } | |
3324 | ||
3325 | /** | |
3326 | * ibmvfc_discover_targets - Send Discover Targets MAD | |
3327 | * @vhost: ibmvfc host struct | |
3328 | * | |
3329 | **/ | |
3330 | static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) | |
3331 | { | |
3332 | struct ibmvfc_discover_targets *mad; | |
3333 | struct ibmvfc_event *evt = ibmvfc_get_event(vhost); | |
3334 | ||
3335 | ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); | |
3336 | mad = &evt->iu.discover_targets; | |
3337 | memset(mad, 0, sizeof(*mad)); | |
3338 | mad->common.version = 1; | |
3339 | mad->common.opcode = IBMVFC_DISC_TARGETS; | |
3340 | mad->common.length = sizeof(*mad); | |
3341 | mad->bufflen = vhost->disc_buf_sz; | |
3342 | mad->buffer.va = vhost->disc_buf_dma; | |
3343 | mad->buffer.len = vhost->disc_buf_sz; | |
3344 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); | |
3345 | ||
3346 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) | |
3347 | ibmvfc_dbg(vhost, "Sent discover targets\n"); | |
3348 | else | |
3349 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3350 | } | |
3351 | ||
3352 | /** | |
3353 | * ibmvfc_npiv_login_done - Completion handler for NPIV Login | |
3354 | * @evt: ibmvfc event struct | |
3355 | * | |
3356 | **/ | |
3357 | static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) | |
3358 | { | |
3359 | struct ibmvfc_host *vhost = evt->vhost; | |
3360 | u32 mad_status = evt->xfer_iu->npiv_login.common.status; | |
3361 | struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; | |
3362 | unsigned int npiv_max_sectors; | |
3363 | ||
3364 | switch (mad_status) { | |
3365 | case IBMVFC_MAD_SUCCESS: | |
3366 | ibmvfc_free_event(evt); | |
3367 | break; | |
3368 | case IBMVFC_MAD_FAILED: | |
3369 | dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n", | |
3370 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); | |
3371 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) | |
3372 | ibmvfc_retry_host_init(vhost); | |
3373 | else | |
3374 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3375 | ibmvfc_free_event(evt); | |
3376 | return; | |
3377 | case IBMVFC_MAD_CRQ_ERROR: | |
3378 | ibmvfc_retry_host_init(vhost); | |
3379 | case IBMVFC_MAD_DRIVER_FAILED: | |
3380 | ibmvfc_free_event(evt); | |
3381 | return; | |
3382 | default: | |
3383 | dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); | |
3384 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3385 | ibmvfc_free_event(evt); | |
3386 | return; | |
3387 | } | |
3388 | ||
3389 | vhost->client_migrated = 0; | |
3390 | ||
3391 | if (!(rsp->flags & IBMVFC_NATIVE_FC)) { | |
3392 | dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", | |
3393 | rsp->flags); | |
3394 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3395 | wake_up(&vhost->work_wait_q); | |
3396 | return; | |
3397 | } | |
3398 | ||
3399 | if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { | |
3400 | dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", | |
3401 | rsp->max_cmds); | |
3402 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3403 | wake_up(&vhost->work_wait_q); | |
3404 | return; | |
3405 | } | |
3406 | ||
3407 | npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); | |
3408 | dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", | |
3409 | rsp->partition_name, rsp->device_name, rsp->port_loc_code, | |
3410 | rsp->drc_name, npiv_max_sectors); | |
3411 | ||
3412 | fc_host_fabric_name(vhost->host) = rsp->node_name; | |
3413 | fc_host_node_name(vhost->host) = rsp->node_name; | |
3414 | fc_host_port_name(vhost->host) = rsp->port_name; | |
3415 | fc_host_port_id(vhost->host) = rsp->scsi_id; | |
3416 | fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; | |
3417 | fc_host_supported_classes(vhost->host) = 0; | |
3418 | if (rsp->service_parms.class1_parms[0] & 0x80000000) | |
3419 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; | |
3420 | if (rsp->service_parms.class2_parms[0] & 0x80000000) | |
3421 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; | |
3422 | if (rsp->service_parms.class3_parms[0] & 0x80000000) | |
3423 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; | |
3424 | fc_host_maxframe_size(vhost->host) = | |
3425 | rsp->service_parms.common.bb_rcv_sz & 0x0fff; | |
3426 | ||
3427 | vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; | |
3428 | vhost->host->max_sectors = npiv_max_sectors; | |
3429 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); | |
3430 | wake_up(&vhost->work_wait_q); | |
3431 | } | |
3432 | ||
3433 | /** | |
3434 | * ibmvfc_npiv_login - Sends NPIV login | |
3435 | * @vhost: ibmvfc host struct | |
3436 | * | |
3437 | **/ | |
3438 | static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) | |
3439 | { | |
3440 | struct ibmvfc_npiv_login_mad *mad; | |
3441 | struct ibmvfc_event *evt = ibmvfc_get_event(vhost); | |
3442 | ||
3443 | ibmvfc_gather_partition_info(vhost); | |
3444 | ibmvfc_set_login_info(vhost); | |
3445 | ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); | |
3446 | ||
3447 | memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); | |
3448 | mad = &evt->iu.npiv_login; | |
3449 | memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); | |
3450 | mad->common.version = 1; | |
3451 | mad->common.opcode = IBMVFC_NPIV_LOGIN; | |
3452 | mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); | |
3453 | mad->buffer.va = vhost->login_buf_dma; | |
3454 | mad->buffer.len = sizeof(*vhost->login_buf); | |
3455 | ||
072b91f9 BK |
3456 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
3457 | ||
3458 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) | |
3459 | ibmvfc_dbg(vhost, "Sent NPIV login\n"); | |
3460 | else | |
3461 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3462 | }; | |
3463 | ||
3464 | /** | |
3465 | * ibmvfc_dev_init_to_do - Is there target initialization work to do? | |
3466 | * @vhost: ibmvfc host struct | |
3467 | * | |
3468 | * Returns: | |
3469 | * 1 if work to do / 0 if not | |
3470 | **/ | |
3471 | static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) | |
3472 | { | |
3473 | struct ibmvfc_target *tgt; | |
3474 | ||
3475 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
3476 | if (tgt->action == IBMVFC_TGT_ACTION_INIT || | |
3477 | tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) | |
3478 | return 1; | |
3479 | } | |
3480 | ||
3481 | return 0; | |
3482 | } | |
3483 | ||
3484 | /** | |
3485 | * __ibmvfc_work_to_do - Is there task level work to do? (no locking) | |
3486 | * @vhost: ibmvfc host struct | |
3487 | * | |
3488 | * Returns: | |
3489 | * 1 if work to do / 0 if not | |
3490 | **/ | |
3491 | static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) | |
3492 | { | |
3493 | struct ibmvfc_target *tgt; | |
3494 | ||
3495 | if (kthread_should_stop()) | |
3496 | return 1; | |
3497 | switch (vhost->action) { | |
3498 | case IBMVFC_HOST_ACTION_NONE: | |
3499 | case IBMVFC_HOST_ACTION_INIT_WAIT: | |
3500 | return 0; | |
3501 | case IBMVFC_HOST_ACTION_TGT_INIT: | |
3502 | case IBMVFC_HOST_ACTION_QUERY_TGTS: | |
3503 | if (vhost->discovery_threads == disc_threads) | |
3504 | return 0; | |
3505 | list_for_each_entry(tgt, &vhost->targets, queue) | |
3506 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) | |
3507 | return 1; | |
3508 | list_for_each_entry(tgt, &vhost->targets, queue) | |
3509 | if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) | |
3510 | return 0; | |
3511 | return 1; | |
3512 | case IBMVFC_HOST_ACTION_INIT: | |
3513 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: | |
3514 | case IBMVFC_HOST_ACTION_TGT_ADD: | |
3515 | case IBMVFC_HOST_ACTION_TGT_DEL: | |
10e79499 | 3516 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 BK |
3517 | case IBMVFC_HOST_ACTION_QUERY: |
3518 | default: | |
3519 | break; | |
3520 | }; | |
3521 | ||
3522 | return 1; | |
3523 | } | |
3524 | ||
3525 | /** | |
3526 | * ibmvfc_work_to_do - Is there task level work to do? | |
3527 | * @vhost: ibmvfc host struct | |
3528 | * | |
3529 | * Returns: | |
3530 | * 1 if work to do / 0 if not | |
3531 | **/ | |
3532 | static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) | |
3533 | { | |
3534 | unsigned long flags; | |
3535 | int rc; | |
3536 | ||
3537 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3538 | rc = __ibmvfc_work_to_do(vhost); | |
3539 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3540 | return rc; | |
3541 | } | |
3542 | ||
3543 | /** | |
3544 | * ibmvfc_log_ae - Log async events if necessary | |
3545 | * @vhost: ibmvfc host struct | |
3546 | * @events: events to log | |
3547 | * | |
3548 | **/ | |
3549 | static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) | |
3550 | { | |
3551 | if (events & IBMVFC_AE_RSCN) | |
3552 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); | |
3553 | if ((events & IBMVFC_AE_LINKDOWN) && | |
3554 | vhost->state >= IBMVFC_HALTED) | |
3555 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); | |
3556 | if ((events & IBMVFC_AE_LINKUP) && | |
3557 | vhost->state == IBMVFC_INITIALIZING) | |
3558 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); | |
3559 | } | |
3560 | ||
3561 | /** | |
3562 | * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port | |
3563 | * @tgt: ibmvfc target struct | |
3564 | * | |
3565 | **/ | |
3566 | static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) | |
3567 | { | |
3568 | struct ibmvfc_host *vhost = tgt->vhost; | |
3569 | struct fc_rport *rport; | |
3570 | unsigned long flags; | |
3571 | ||
3572 | tgt_dbg(tgt, "Adding rport\n"); | |
3573 | rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); | |
3574 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3575 | tgt->rport = rport; | |
3576 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3577 | if (rport) { | |
3578 | tgt_dbg(tgt, "rport add succeeded\n"); | |
3579 | rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; | |
3580 | rport->supported_classes = 0; | |
52d7e861 | 3581 | tgt->target_id = rport->scsi_target_id; |
072b91f9 BK |
3582 | if (tgt->service_parms.class1_parms[0] & 0x80000000) |
3583 | rport->supported_classes |= FC_COS_CLASS1; | |
3584 | if (tgt->service_parms.class2_parms[0] & 0x80000000) | |
3585 | rport->supported_classes |= FC_COS_CLASS2; | |
3586 | if (tgt->service_parms.class3_parms[0] & 0x80000000) | |
3587 | rport->supported_classes |= FC_COS_CLASS3; | |
3588 | } else | |
3589 | tgt_dbg(tgt, "rport add failed\n"); | |
3590 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3591 | } | |
3592 | ||
3593 | /** | |
3594 | * ibmvfc_do_work - Do task level work | |
3595 | * @vhost: ibmvfc host struct | |
3596 | * | |
3597 | **/ | |
3598 | static void ibmvfc_do_work(struct ibmvfc_host *vhost) | |
3599 | { | |
3600 | struct ibmvfc_target *tgt; | |
3601 | unsigned long flags; | |
3602 | struct fc_rport *rport; | |
3603 | ||
3604 | ibmvfc_log_ae(vhost, vhost->events_to_log); | |
3605 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3606 | vhost->events_to_log = 0; | |
3607 | switch (vhost->action) { | |
3608 | case IBMVFC_HOST_ACTION_NONE: | |
3609 | case IBMVFC_HOST_ACTION_INIT_WAIT: | |
3610 | break; | |
3611 | case IBMVFC_HOST_ACTION_INIT: | |
3612 | BUG_ON(vhost->state != IBMVFC_INITIALIZING); | |
3613 | vhost->job_step(vhost); | |
3614 | break; | |
3615 | case IBMVFC_HOST_ACTION_QUERY: | |
3616 | list_for_each_entry(tgt, &vhost->targets, queue) | |
3617 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); | |
3618 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); | |
3619 | break; | |
3620 | case IBMVFC_HOST_ACTION_QUERY_TGTS: | |
3621 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
3622 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) { | |
3623 | tgt->job_step(tgt); | |
3624 | break; | |
3625 | } | |
3626 | } | |
3627 | ||
3628 | if (!ibmvfc_dev_init_to_do(vhost)) | |
3629 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); | |
3630 | break; | |
3631 | case IBMVFC_HOST_ACTION_TGT_DEL: | |
10e79499 | 3632 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 BK |
3633 | list_for_each_entry(tgt, &vhost->targets, queue) { |
3634 | if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { | |
3635 | tgt_dbg(tgt, "Deleting rport\n"); | |
3636 | rport = tgt->rport; | |
3637 | tgt->rport = NULL; | |
3638 | list_del(&tgt->queue); | |
3639 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3640 | if (rport) | |
3641 | fc_remote_port_delete(rport); | |
3642 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3643 | return; | |
3644 | } | |
3645 | } | |
3646 | ||
3647 | if (vhost->state == IBMVFC_INITIALIZING) { | |
10e79499 BK |
3648 | if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { |
3649 | ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); | |
3650 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD); | |
3651 | vhost->init_retries = 0; | |
3652 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3653 | scsi_unblock_requests(vhost->host); | |
3654 | return; | |
3655 | } else { | |
3656 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); | |
3657 | vhost->job_step = ibmvfc_discover_targets; | |
3658 | } | |
072b91f9 BK |
3659 | } else { |
3660 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); | |
3661 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3662 | scsi_unblock_requests(vhost->host); | |
3663 | wake_up(&vhost->init_wait_q); | |
3664 | return; | |
3665 | } | |
3666 | break; | |
3667 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: | |
3668 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); | |
3669 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3670 | ibmvfc_alloc_targets(vhost); | |
3671 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3672 | break; | |
3673 | case IBMVFC_HOST_ACTION_TGT_INIT: | |
3674 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
3675 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) { | |
3676 | tgt->job_step(tgt); | |
3677 | break; | |
3678 | } | |
3679 | } | |
3680 | ||
10e79499 BK |
3681 | if (!ibmvfc_dev_init_to_do(vhost)) |
3682 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); | |
072b91f9 BK |
3683 | break; |
3684 | case IBMVFC_HOST_ACTION_TGT_ADD: | |
3685 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
3686 | if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) { | |
3687 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3688 | ibmvfc_tgt_add_rport(tgt); | |
3689 | return; | |
072b91f9 BK |
3690 | } |
3691 | } | |
3692 | ||
915be024 | 3693 | if (vhost->reinit && !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
072b91f9 | 3694 | vhost->reinit = 0; |
915be024 | 3695 | scsi_block_requests(vhost->host); |
072b91f9 BK |
3696 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
3697 | } else { | |
3698 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); | |
3699 | wake_up(&vhost->init_wait_q); | |
3700 | } | |
3701 | break; | |
3702 | default: | |
3703 | break; | |
3704 | }; | |
3705 | ||
3706 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3707 | } | |
3708 | ||
3709 | /** | |
3710 | * ibmvfc_work - Do task level work | |
3711 | * @data: ibmvfc host struct | |
3712 | * | |
3713 | * Returns: | |
3714 | * zero | |
3715 | **/ | |
3716 | static int ibmvfc_work(void *data) | |
3717 | { | |
3718 | struct ibmvfc_host *vhost = data; | |
3719 | int rc; | |
3720 | ||
3721 | set_user_nice(current, -20); | |
3722 | ||
3723 | while (1) { | |
3724 | rc = wait_event_interruptible(vhost->work_wait_q, | |
3725 | ibmvfc_work_to_do(vhost)); | |
3726 | ||
3727 | BUG_ON(rc); | |
3728 | ||
3729 | if (kthread_should_stop()) | |
3730 | break; | |
3731 | ||
3732 | ibmvfc_do_work(vhost); | |
3733 | } | |
3734 | ||
3735 | ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); | |
3736 | return 0; | |
3737 | } | |
3738 | ||
3739 | /** | |
3740 | * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor | |
3741 | * @vhost: ibmvfc host struct | |
3742 | * | |
3743 | * Allocates a page for messages, maps it for dma, and registers | |
3744 | * the crq with the hypervisor. | |
3745 | * | |
3746 | * Return value: | |
3747 | * zero on success / other on failure | |
3748 | **/ | |
3749 | static int ibmvfc_init_crq(struct ibmvfc_host *vhost) | |
3750 | { | |
3751 | int rc, retrc = -ENOMEM; | |
3752 | struct device *dev = vhost->dev; | |
3753 | struct vio_dev *vdev = to_vio_dev(dev); | |
3754 | struct ibmvfc_crq_queue *crq = &vhost->crq; | |
3755 | ||
3756 | ENTER; | |
3757 | crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); | |
3758 | ||
3759 | if (!crq->msgs) | |
3760 | return -ENOMEM; | |
3761 | ||
3762 | crq->size = PAGE_SIZE / sizeof(*crq->msgs); | |
3763 | crq->msg_token = dma_map_single(dev, crq->msgs, | |
3764 | PAGE_SIZE, DMA_BIDIRECTIONAL); | |
3765 | ||
8d8bb39b | 3766 | if (dma_mapping_error(dev, crq->msg_token)) |
072b91f9 BK |
3767 | goto map_failed; |
3768 | ||
3769 | retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, | |
3770 | crq->msg_token, PAGE_SIZE); | |
3771 | ||
3772 | if (rc == H_RESOURCE) | |
3773 | /* maybe kexecing and resource is busy. try a reset */ | |
3774 | retrc = rc = ibmvfc_reset_crq(vhost); | |
3775 | ||
3776 | if (rc == H_CLOSED) | |
3777 | dev_warn(dev, "Partner adapter not ready\n"); | |
3778 | else if (rc) { | |
3779 | dev_warn(dev, "Error %d opening adapter\n", rc); | |
3780 | goto reg_crq_failed; | |
3781 | } | |
3782 | ||
3783 | retrc = 0; | |
3784 | ||
3785 | if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { | |
3786 | dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); | |
3787 | goto req_irq_failed; | |
3788 | } | |
3789 | ||
3790 | if ((rc = vio_enable_interrupts(vdev))) { | |
3791 | dev_err(dev, "Error %d enabling interrupts\n", rc); | |
3792 | goto req_irq_failed; | |
3793 | } | |
3794 | ||
3795 | crq->cur = 0; | |
3796 | LEAVE; | |
3797 | return retrc; | |
3798 | ||
3799 | req_irq_failed: | |
3800 | do { | |
3801 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); | |
3802 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
3803 | reg_crq_failed: | |
3804 | dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); | |
3805 | map_failed: | |
3806 | free_page((unsigned long)crq->msgs); | |
3807 | return retrc; | |
3808 | } | |
3809 | ||
3810 | /** | |
3811 | * ibmvfc_free_mem - Free memory for vhost | |
3812 | * @vhost: ibmvfc host struct | |
3813 | * | |
3814 | * Return value: | |
3815 | * none | |
3816 | **/ | |
3817 | static void ibmvfc_free_mem(struct ibmvfc_host *vhost) | |
3818 | { | |
3819 | struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; | |
3820 | ||
3821 | ENTER; | |
3822 | mempool_destroy(vhost->tgt_pool); | |
3823 | kfree(vhost->trace); | |
3824 | dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, | |
3825 | vhost->disc_buf_dma); | |
3826 | dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), | |
3827 | vhost->login_buf, vhost->login_buf_dma); | |
3828 | dma_pool_destroy(vhost->sg_pool); | |
3829 | dma_unmap_single(vhost->dev, async_q->msg_token, | |
3830 | async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); | |
3831 | free_page((unsigned long)async_q->msgs); | |
3832 | LEAVE; | |
3833 | } | |
3834 | ||
3835 | /** | |
3836 | * ibmvfc_alloc_mem - Allocate memory for vhost | |
3837 | * @vhost: ibmvfc host struct | |
3838 | * | |
3839 | * Return value: | |
3840 | * 0 on success / non-zero on failure | |
3841 | **/ | |
3842 | static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) | |
3843 | { | |
3844 | struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; | |
3845 | struct device *dev = vhost->dev; | |
3846 | ||
3847 | ENTER; | |
3848 | async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); | |
3849 | if (!async_q->msgs) { | |
3850 | dev_err(dev, "Couldn't allocate async queue.\n"); | |
3851 | goto nomem; | |
3852 | } | |
3853 | ||
3854 | async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); | |
3855 | async_q->msg_token = dma_map_single(dev, async_q->msgs, | |
3856 | async_q->size * sizeof(*async_q->msgs), | |
3857 | DMA_BIDIRECTIONAL); | |
3858 | ||
8d8bb39b | 3859 | if (dma_mapping_error(dev, async_q->msg_token)) { |
072b91f9 BK |
3860 | dev_err(dev, "Failed to map async queue\n"); |
3861 | goto free_async_crq; | |
3862 | } | |
3863 | ||
3864 | vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, | |
3865 | SG_ALL * sizeof(struct srp_direct_buf), | |
3866 | sizeof(struct srp_direct_buf), 0); | |
3867 | ||
3868 | if (!vhost->sg_pool) { | |
3869 | dev_err(dev, "Failed to allocate sg pool\n"); | |
3870 | goto unmap_async_crq; | |
3871 | } | |
3872 | ||
3873 | vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), | |
3874 | &vhost->login_buf_dma, GFP_KERNEL); | |
3875 | ||
3876 | if (!vhost->login_buf) { | |
3877 | dev_err(dev, "Couldn't allocate NPIV login buffer\n"); | |
3878 | goto free_sg_pool; | |
3879 | } | |
3880 | ||
3881 | vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; | |
3882 | vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, | |
3883 | &vhost->disc_buf_dma, GFP_KERNEL); | |
3884 | ||
3885 | if (!vhost->disc_buf) { | |
3886 | dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); | |
3887 | goto free_login_buffer; | |
3888 | } | |
3889 | ||
3890 | vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, | |
3891 | sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); | |
3892 | ||
3893 | if (!vhost->trace) | |
3894 | goto free_disc_buffer; | |
3895 | ||
3896 | vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, | |
3897 | sizeof(struct ibmvfc_target)); | |
3898 | ||
3899 | if (!vhost->tgt_pool) { | |
3900 | dev_err(dev, "Couldn't allocate target memory pool\n"); | |
3901 | goto free_trace; | |
3902 | } | |
3903 | ||
3904 | LEAVE; | |
3905 | return 0; | |
3906 | ||
3907 | free_trace: | |
3908 | kfree(vhost->trace); | |
3909 | free_disc_buffer: | |
3910 | dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, | |
3911 | vhost->disc_buf_dma); | |
3912 | free_login_buffer: | |
3913 | dma_free_coherent(dev, sizeof(*vhost->login_buf), | |
3914 | vhost->login_buf, vhost->login_buf_dma); | |
3915 | free_sg_pool: | |
3916 | dma_pool_destroy(vhost->sg_pool); | |
3917 | unmap_async_crq: | |
3918 | dma_unmap_single(dev, async_q->msg_token, | |
3919 | async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); | |
3920 | free_async_crq: | |
3921 | free_page((unsigned long)async_q->msgs); | |
3922 | nomem: | |
3923 | LEAVE; | |
3924 | return -ENOMEM; | |
3925 | } | |
3926 | ||
3927 | /** | |
3928 | * ibmvfc_probe - Adapter hot plug add entry point | |
3929 | * @vdev: vio device struct | |
3930 | * @id: vio device id struct | |
3931 | * | |
3932 | * Return value: | |
3933 | * 0 on success / non-zero on failure | |
3934 | **/ | |
3935 | static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) | |
3936 | { | |
3937 | struct ibmvfc_host *vhost; | |
3938 | struct Scsi_Host *shost; | |
3939 | struct device *dev = &vdev->dev; | |
3940 | int rc = -ENOMEM; | |
3941 | ||
3942 | ENTER; | |
3943 | shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); | |
3944 | if (!shost) { | |
3945 | dev_err(dev, "Couldn't allocate host data\n"); | |
3946 | goto out; | |
3947 | } | |
3948 | ||
3949 | shost->transportt = ibmvfc_transport_template; | |
3950 | shost->can_queue = max_requests; | |
3951 | shost->max_lun = max_lun; | |
3952 | shost->max_id = max_targets; | |
3953 | shost->max_sectors = IBMVFC_MAX_SECTORS; | |
3954 | shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; | |
3955 | shost->unique_id = shost->host_no; | |
3956 | ||
3957 | vhost = shost_priv(shost); | |
3958 | INIT_LIST_HEAD(&vhost->sent); | |
3959 | INIT_LIST_HEAD(&vhost->free); | |
3960 | INIT_LIST_HEAD(&vhost->targets); | |
3961 | sprintf(vhost->name, IBMVFC_NAME); | |
3962 | vhost->host = shost; | |
3963 | vhost->dev = dev; | |
3964 | vhost->partition_number = -1; | |
3965 | vhost->log_level = log_level; | |
3966 | strcpy(vhost->partition_name, "UNKNOWN"); | |
3967 | init_waitqueue_head(&vhost->work_wait_q); | |
3968 | init_waitqueue_head(&vhost->init_wait_q); | |
3969 | ||
3970 | if ((rc = ibmvfc_alloc_mem(vhost))) | |
3971 | goto free_scsi_host; | |
3972 | ||
3973 | vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, | |
3974 | shost->host_no); | |
3975 | ||
3976 | if (IS_ERR(vhost->work_thread)) { | |
3977 | dev_err(dev, "Couldn't create kernel thread: %ld\n", | |
3978 | PTR_ERR(vhost->work_thread)); | |
3979 | goto free_host_mem; | |
3980 | } | |
3981 | ||
3982 | if ((rc = ibmvfc_init_crq(vhost))) { | |
3983 | dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); | |
3984 | goto kill_kthread; | |
3985 | } | |
3986 | ||
3987 | if ((rc = ibmvfc_init_event_pool(vhost))) { | |
3988 | dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); | |
3989 | goto release_crq; | |
3990 | } | |
3991 | ||
3992 | if ((rc = scsi_add_host(shost, dev))) | |
3993 | goto release_event_pool; | |
3994 | ||
3995 | if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, | |
3996 | &ibmvfc_trace_attr))) { | |
3997 | dev_err(dev, "Failed to create trace file. rc=%d\n", rc); | |
3998 | goto remove_shost; | |
3999 | } | |
4000 | ||
4001 | dev_set_drvdata(dev, vhost); | |
4002 | spin_lock(&ibmvfc_driver_lock); | |
4003 | list_add_tail(&vhost->queue, &ibmvfc_head); | |
4004 | spin_unlock(&ibmvfc_driver_lock); | |
4005 | ||
4006 | ibmvfc_send_crq_init(vhost); | |
4007 | scsi_scan_host(shost); | |
4008 | return 0; | |
4009 | ||
4010 | remove_shost: | |
4011 | scsi_remove_host(shost); | |
4012 | release_event_pool: | |
4013 | ibmvfc_free_event_pool(vhost); | |
4014 | release_crq: | |
4015 | ibmvfc_release_crq_queue(vhost); | |
4016 | kill_kthread: | |
4017 | kthread_stop(vhost->work_thread); | |
4018 | free_host_mem: | |
4019 | ibmvfc_free_mem(vhost); | |
4020 | free_scsi_host: | |
4021 | scsi_host_put(shost); | |
4022 | out: | |
4023 | LEAVE; | |
4024 | return rc; | |
4025 | } | |
4026 | ||
4027 | /** | |
4028 | * ibmvfc_remove - Adapter hot plug remove entry point | |
4029 | * @vdev: vio device struct | |
4030 | * | |
4031 | * Return value: | |
4032 | * 0 | |
4033 | **/ | |
4034 | static int ibmvfc_remove(struct vio_dev *vdev) | |
4035 | { | |
4036 | struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); | |
4037 | unsigned long flags; | |
4038 | ||
4039 | ENTER; | |
4040 | ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); | |
2d0da2a4 BK |
4041 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
4042 | ibmvfc_wait_while_resetting(vhost); | |
4043 | ibmvfc_release_crq_queue(vhost); | |
072b91f9 BK |
4044 | kthread_stop(vhost->work_thread); |
4045 | fc_remove_host(vhost->host); | |
4046 | scsi_remove_host(vhost->host); | |
072b91f9 BK |
4047 | |
4048 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4049 | ibmvfc_purge_requests(vhost, DID_ERROR); | |
4050 | ibmvfc_free_event_pool(vhost); | |
4051 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4052 | ||
4053 | ibmvfc_free_mem(vhost); | |
4054 | spin_lock(&ibmvfc_driver_lock); | |
4055 | list_del(&vhost->queue); | |
4056 | spin_unlock(&ibmvfc_driver_lock); | |
4057 | scsi_host_put(vhost->host); | |
4058 | LEAVE; | |
4059 | return 0; | |
4060 | } | |
4061 | ||
39c1ffec BK |
4062 | /** |
4063 | * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver | |
4064 | * @vdev: vio device struct | |
4065 | * | |
4066 | * Return value: | |
4067 | * Number of bytes the driver will need to DMA map at the same time in | |
4068 | * order to perform well. | |
4069 | */ | |
4070 | static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) | |
4071 | { | |
4072 | unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); | |
4073 | return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); | |
4074 | } | |
4075 | ||
072b91f9 BK |
4076 | static struct vio_device_id ibmvfc_device_table[] __devinitdata = { |
4077 | {"fcp", "IBM,vfc-client"}, | |
4078 | { "", "" } | |
4079 | }; | |
4080 | MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); | |
4081 | ||
4082 | static struct vio_driver ibmvfc_driver = { | |
4083 | .id_table = ibmvfc_device_table, | |
4084 | .probe = ibmvfc_probe, | |
4085 | .remove = ibmvfc_remove, | |
39c1ffec | 4086 | .get_desired_dma = ibmvfc_get_desired_dma, |
072b91f9 BK |
4087 | .driver = { |
4088 | .name = IBMVFC_NAME, | |
4089 | .owner = THIS_MODULE, | |
4090 | } | |
4091 | }; | |
4092 | ||
4093 | static struct fc_function_template ibmvfc_transport_functions = { | |
4094 | .show_host_fabric_name = 1, | |
4095 | .show_host_node_name = 1, | |
4096 | .show_host_port_name = 1, | |
4097 | .show_host_supported_classes = 1, | |
4098 | .show_host_port_type = 1, | |
4099 | .show_host_port_id = 1, | |
4100 | ||
4101 | .get_host_port_state = ibmvfc_get_host_port_state, | |
4102 | .show_host_port_state = 1, | |
4103 | ||
4104 | .get_host_speed = ibmvfc_get_host_speed, | |
4105 | .show_host_speed = 1, | |
4106 | ||
4107 | .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, | |
4108 | .terminate_rport_io = ibmvfc_terminate_rport_io, | |
4109 | ||
4110 | .show_rport_maxframe_size = 1, | |
4111 | .show_rport_supported_classes = 1, | |
4112 | ||
4113 | .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, | |
4114 | .show_rport_dev_loss_tmo = 1, | |
4115 | ||
4116 | .get_starget_node_name = ibmvfc_get_starget_node_name, | |
4117 | .show_starget_node_name = 1, | |
4118 | ||
4119 | .get_starget_port_name = ibmvfc_get_starget_port_name, | |
4120 | .show_starget_port_name = 1, | |
4121 | ||
4122 | .get_starget_port_id = ibmvfc_get_starget_port_id, | |
4123 | .show_starget_port_id = 1, | |
4124 | }; | |
4125 | ||
4126 | /** | |
4127 | * ibmvfc_module_init - Initialize the ibmvfc module | |
4128 | * | |
4129 | * Return value: | |
4130 | * 0 on success / other on failure | |
4131 | **/ | |
4132 | static int __init ibmvfc_module_init(void) | |
4133 | { | |
4134 | int rc; | |
4135 | ||
4136 | if (!firmware_has_feature(FW_FEATURE_VIO)) | |
4137 | return -ENODEV; | |
4138 | ||
4139 | printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", | |
4140 | IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); | |
4141 | ||
4142 | ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); | |
4143 | if (!ibmvfc_transport_template) | |
4144 | return -ENOMEM; | |
4145 | ||
4146 | rc = vio_register_driver(&ibmvfc_driver); | |
4147 | if (rc) | |
4148 | fc_release_transport(ibmvfc_transport_template); | |
4149 | return rc; | |
4150 | } | |
4151 | ||
4152 | /** | |
4153 | * ibmvfc_module_exit - Teardown the ibmvfc module | |
4154 | * | |
4155 | * Return value: | |
4156 | * nothing | |
4157 | **/ | |
4158 | static void __exit ibmvfc_module_exit(void) | |
4159 | { | |
4160 | vio_unregister_driver(&ibmvfc_driver); | |
4161 | fc_release_transport(ibmvfc_transport_template); | |
4162 | } | |
4163 | ||
4164 | module_init(ibmvfc_module_init); | |
4165 | module_exit(ibmvfc_module_exit); |