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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> | |
d31429e1 | 42 | #include <scsi/scsi_bsg_fc.h> |
072b91f9 BK |
43 | #include "ibmvfc.h" |
44 | ||
45 | static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; | |
46 | static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; | |
47 | static unsigned int max_lun = IBMVFC_MAX_LUN; | |
48 | static unsigned int max_targets = IBMVFC_MAX_TARGETS; | |
49 | static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; | |
50 | static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; | |
51 | static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO; | |
52 | static unsigned int ibmvfc_debug = IBMVFC_DEBUG; | |
53 | static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; | |
54 | static LIST_HEAD(ibmvfc_head); | |
55 | static DEFINE_SPINLOCK(ibmvfc_driver_lock); | |
56 | static struct scsi_transport_template *ibmvfc_transport_template; | |
57 | ||
58 | MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); | |
59 | MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); | |
60 | MODULE_LICENSE("GPL"); | |
61 | MODULE_VERSION(IBMVFC_DRIVER_VERSION); | |
62 | ||
63 | module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); | |
64 | MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " | |
65 | "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); | |
66 | module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); | |
67 | MODULE_PARM_DESC(default_timeout, | |
68 | "Default timeout in seconds for initialization and EH commands. " | |
69 | "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); | |
70 | module_param_named(max_requests, max_requests, uint, S_IRUGO); | |
71 | MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " | |
72 | "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); | |
73 | module_param_named(max_lun, max_lun, uint, S_IRUGO); | |
74 | MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " | |
75 | "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); | |
76 | module_param_named(max_targets, max_targets, uint, S_IRUGO); | |
77 | MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " | |
78 | "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); | |
545ef9a2 | 79 | module_param_named(disc_threads, disc_threads, uint, S_IRUGO); |
072b91f9 BK |
80 | MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " |
81 | "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); | |
82 | module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); | |
83 | MODULE_PARM_DESC(debug, "Enable driver debug information. " | |
84 | "[Default=" __stringify(IBMVFC_DEBUG) "]"); | |
85 | module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR); | |
86 | MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC " | |
87 | "transport should insulate the loss of a remote port. Once this " | |
88 | "value is exceeded, the scsi target is removed. " | |
89 | "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]"); | |
90 | module_param_named(log_level, log_level, uint, 0); | |
91 | MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " | |
92 | "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); | |
93 | ||
94 | static const struct { | |
95 | u16 status; | |
96 | u16 error; | |
97 | u8 result; | |
98 | u8 retry; | |
99 | int log; | |
100 | char *name; | |
101 | } cmd_status [] = { | |
102 | { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, | |
103 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, | |
104 | { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, | |
752b3232 | 105 | { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, |
072b91f9 BK |
106 | { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, |
107 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, | |
108 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, | |
109 | { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, | |
110 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, | |
111 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, | |
112 | { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, | |
113 | { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, | |
497f9c50 | 114 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, |
072b91f9 BK |
115 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, |
116 | ||
117 | { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, | |
118 | { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, | |
752b3232 BK |
119 | { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, |
120 | { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, | |
072b91f9 | 121 | { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, |
752b3232 BK |
122 | { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, |
123 | { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, | |
072b91f9 | 124 | { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, |
646d3857 | 125 | { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, |
072b91f9 BK |
126 | { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, |
127 | ||
128 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, | |
129 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, | |
130 | { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, | |
131 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, | |
132 | { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, | |
133 | { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, | |
134 | { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, | |
135 | { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, | |
136 | { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, | |
137 | { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, | |
138 | { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, | |
139 | ||
140 | { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, | |
141 | }; | |
142 | ||
143 | static void ibmvfc_npiv_login(struct ibmvfc_host *); | |
144 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); | |
145 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); | |
146 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *); | |
79111d08 | 147 | static void ibmvfc_npiv_logout(struct ibmvfc_host *); |
072b91f9 BK |
148 | |
149 | static const char *unknown_error = "unknown error"; | |
150 | ||
151 | #ifdef CONFIG_SCSI_IBMVFC_TRACE | |
152 | /** | |
153 | * ibmvfc_trc_start - Log a start trace entry | |
154 | * @evt: ibmvfc event struct | |
155 | * | |
156 | **/ | |
157 | static void ibmvfc_trc_start(struct ibmvfc_event *evt) | |
158 | { | |
159 | struct ibmvfc_host *vhost = evt->vhost; | |
160 | struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; | |
161 | struct ibmvfc_mad_common *mad = &evt->iu.mad_common; | |
162 | struct ibmvfc_trace_entry *entry; | |
163 | ||
164 | entry = &vhost->trace[vhost->trace_index++]; | |
165 | entry->evt = evt; | |
166 | entry->time = jiffies; | |
167 | entry->fmt = evt->crq.format; | |
168 | entry->type = IBMVFC_TRC_START; | |
169 | ||
170 | switch (entry->fmt) { | |
171 | case IBMVFC_CMD_FORMAT: | |
172 | entry->op_code = vfc_cmd->iu.cdb[0]; | |
173 | entry->scsi_id = vfc_cmd->tgt_scsi_id; | |
174 | entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); | |
175 | entry->tmf_flags = vfc_cmd->iu.tmf_flags; | |
176 | entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; | |
177 | break; | |
178 | case IBMVFC_MAD_FORMAT: | |
179 | entry->op_code = mad->opcode; | |
180 | break; | |
181 | default: | |
182 | break; | |
183 | }; | |
184 | } | |
185 | ||
186 | /** | |
187 | * ibmvfc_trc_end - Log an end trace entry | |
188 | * @evt: ibmvfc event struct | |
189 | * | |
190 | **/ | |
191 | static void ibmvfc_trc_end(struct ibmvfc_event *evt) | |
192 | { | |
193 | struct ibmvfc_host *vhost = evt->vhost; | |
194 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
195 | struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; | |
196 | struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; | |
197 | ||
198 | entry->evt = evt; | |
199 | entry->time = jiffies; | |
200 | entry->fmt = evt->crq.format; | |
201 | entry->type = IBMVFC_TRC_END; | |
202 | ||
203 | switch (entry->fmt) { | |
204 | case IBMVFC_CMD_FORMAT: | |
205 | entry->op_code = vfc_cmd->iu.cdb[0]; | |
206 | entry->scsi_id = vfc_cmd->tgt_scsi_id; | |
207 | entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); | |
208 | entry->tmf_flags = vfc_cmd->iu.tmf_flags; | |
209 | entry->u.end.status = vfc_cmd->status; | |
210 | entry->u.end.error = vfc_cmd->error; | |
211 | entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; | |
212 | entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; | |
213 | entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; | |
214 | break; | |
215 | case IBMVFC_MAD_FORMAT: | |
216 | entry->op_code = mad->opcode; | |
217 | entry->u.end.status = mad->status; | |
218 | break; | |
219 | default: | |
220 | break; | |
221 | ||
222 | }; | |
223 | } | |
224 | ||
225 | #else | |
226 | #define ibmvfc_trc_start(evt) do { } while (0) | |
227 | #define ibmvfc_trc_end(evt) do { } while (0) | |
228 | #endif | |
229 | ||
230 | /** | |
231 | * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response | |
232 | * @status: status / error class | |
233 | * @error: error | |
234 | * | |
235 | * Return value: | |
236 | * index into cmd_status / -EINVAL on failure | |
237 | **/ | |
238 | static int ibmvfc_get_err_index(u16 status, u16 error) | |
239 | { | |
240 | int i; | |
241 | ||
242 | for (i = 0; i < ARRAY_SIZE(cmd_status); i++) | |
243 | if ((cmd_status[i].status & status) == cmd_status[i].status && | |
244 | cmd_status[i].error == error) | |
245 | return i; | |
246 | ||
247 | return -EINVAL; | |
248 | } | |
249 | ||
250 | /** | |
251 | * ibmvfc_get_cmd_error - Find the error description for the fcp response | |
252 | * @status: status / error class | |
253 | * @error: error | |
254 | * | |
255 | * Return value: | |
256 | * error description string | |
257 | **/ | |
258 | static const char *ibmvfc_get_cmd_error(u16 status, u16 error) | |
259 | { | |
260 | int rc = ibmvfc_get_err_index(status, error); | |
261 | if (rc >= 0) | |
262 | return cmd_status[rc].name; | |
263 | return unknown_error; | |
264 | } | |
265 | ||
266 | /** | |
267 | * ibmvfc_get_err_result - Find the scsi status to return for the fcp response | |
268 | * @vfc_cmd: ibmvfc command struct | |
269 | * | |
270 | * Return value: | |
271 | * SCSI result value to return for completed command | |
272 | **/ | |
273 | static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) | |
274 | { | |
275 | int err; | |
276 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; | |
277 | int fc_rsp_len = rsp->fcp_rsp_len; | |
278 | ||
279 | if ((rsp->flags & FCP_RSP_LEN_VALID) && | |
4a2837d4 | 280 | ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || |
072b91f9 BK |
281 | rsp->data.info.rsp_code)) |
282 | return DID_ERROR << 16; | |
283 | ||
072b91f9 BK |
284 | err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); |
285 | if (err >= 0) | |
286 | return rsp->scsi_status | (cmd_status[err].result << 16); | |
287 | return rsp->scsi_status | (DID_ERROR << 16); | |
288 | } | |
289 | ||
290 | /** | |
291 | * ibmvfc_retry_cmd - Determine if error status is retryable | |
292 | * @status: status / error class | |
293 | * @error: error | |
294 | * | |
295 | * Return value: | |
296 | * 1 if error should be retried / 0 if it should not | |
297 | **/ | |
298 | static int ibmvfc_retry_cmd(u16 status, u16 error) | |
299 | { | |
300 | int rc = ibmvfc_get_err_index(status, error); | |
301 | ||
302 | if (rc >= 0) | |
303 | return cmd_status[rc].retry; | |
304 | return 1; | |
305 | } | |
306 | ||
307 | static const char *unknown_fc_explain = "unknown fc explain"; | |
308 | ||
309 | static const struct { | |
310 | u16 fc_explain; | |
311 | char *name; | |
312 | } ls_explain [] = { | |
313 | { 0x00, "no additional explanation" }, | |
314 | { 0x01, "service parameter error - options" }, | |
315 | { 0x03, "service parameter error - initiator control" }, | |
316 | { 0x05, "service parameter error - recipient control" }, | |
317 | { 0x07, "service parameter error - received data field size" }, | |
318 | { 0x09, "service parameter error - concurrent seq" }, | |
319 | { 0x0B, "service parameter error - credit" }, | |
320 | { 0x0D, "invalid N_Port/F_Port_Name" }, | |
321 | { 0x0E, "invalid node/Fabric Name" }, | |
322 | { 0x0F, "invalid common service parameters" }, | |
323 | { 0x11, "invalid association header" }, | |
324 | { 0x13, "association header required" }, | |
325 | { 0x15, "invalid originator S_ID" }, | |
326 | { 0x17, "invalid OX_ID-RX-ID combination" }, | |
327 | { 0x19, "command (request) already in progress" }, | |
328 | { 0x1E, "N_Port Login requested" }, | |
329 | { 0x1F, "Invalid N_Port_ID" }, | |
330 | }; | |
331 | ||
332 | static const struct { | |
333 | u16 fc_explain; | |
334 | char *name; | |
335 | } gs_explain [] = { | |
336 | { 0x00, "no additional explanation" }, | |
337 | { 0x01, "port identifier not registered" }, | |
338 | { 0x02, "port name not registered" }, | |
339 | { 0x03, "node name not registered" }, | |
340 | { 0x04, "class of service not registered" }, | |
341 | { 0x06, "initial process associator not registered" }, | |
342 | { 0x07, "FC-4 TYPEs not registered" }, | |
343 | { 0x08, "symbolic port name not registered" }, | |
344 | { 0x09, "symbolic node name not registered" }, | |
345 | { 0x0A, "port type not registered" }, | |
346 | { 0xF0, "authorization exception" }, | |
347 | { 0xF1, "authentication exception" }, | |
348 | { 0xF2, "data base full" }, | |
349 | { 0xF3, "data base empty" }, | |
350 | { 0xF4, "processing request" }, | |
351 | { 0xF5, "unable to verify connection" }, | |
352 | { 0xF6, "devices not in a common zone" }, | |
353 | }; | |
354 | ||
355 | /** | |
356 | * ibmvfc_get_ls_explain - Return the FC Explain description text | |
357 | * @status: FC Explain status | |
358 | * | |
359 | * Returns: | |
360 | * error string | |
361 | **/ | |
362 | static const char *ibmvfc_get_ls_explain(u16 status) | |
363 | { | |
364 | int i; | |
365 | ||
366 | for (i = 0; i < ARRAY_SIZE(ls_explain); i++) | |
367 | if (ls_explain[i].fc_explain == status) | |
368 | return ls_explain[i].name; | |
369 | ||
370 | return unknown_fc_explain; | |
371 | } | |
372 | ||
373 | /** | |
374 | * ibmvfc_get_gs_explain - Return the FC Explain description text | |
375 | * @status: FC Explain status | |
376 | * | |
377 | * Returns: | |
378 | * error string | |
379 | **/ | |
380 | static const char *ibmvfc_get_gs_explain(u16 status) | |
381 | { | |
382 | int i; | |
383 | ||
384 | for (i = 0; i < ARRAY_SIZE(gs_explain); i++) | |
385 | if (gs_explain[i].fc_explain == status) | |
386 | return gs_explain[i].name; | |
387 | ||
388 | return unknown_fc_explain; | |
389 | } | |
390 | ||
391 | static const struct { | |
392 | enum ibmvfc_fc_type fc_type; | |
393 | char *name; | |
394 | } fc_type [] = { | |
395 | { IBMVFC_FABRIC_REJECT, "fabric reject" }, | |
396 | { IBMVFC_PORT_REJECT, "port reject" }, | |
397 | { IBMVFC_LS_REJECT, "ELS reject" }, | |
398 | { IBMVFC_FABRIC_BUSY, "fabric busy" }, | |
399 | { IBMVFC_PORT_BUSY, "port busy" }, | |
400 | { IBMVFC_BASIC_REJECT, "basic reject" }, | |
401 | }; | |
402 | ||
403 | static const char *unknown_fc_type = "unknown fc type"; | |
404 | ||
405 | /** | |
406 | * ibmvfc_get_fc_type - Return the FC Type description text | |
407 | * @status: FC Type error status | |
408 | * | |
409 | * Returns: | |
410 | * error string | |
411 | **/ | |
412 | static const char *ibmvfc_get_fc_type(u16 status) | |
413 | { | |
414 | int i; | |
415 | ||
416 | for (i = 0; i < ARRAY_SIZE(fc_type); i++) | |
417 | if (fc_type[i].fc_type == status) | |
418 | return fc_type[i].name; | |
419 | ||
420 | return unknown_fc_type; | |
421 | } | |
422 | ||
423 | /** | |
424 | * ibmvfc_set_tgt_action - Set the next init action for the target | |
425 | * @tgt: ibmvfc target struct | |
426 | * @action: action to perform | |
427 | * | |
428 | **/ | |
429 | static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, | |
430 | enum ibmvfc_target_action action) | |
431 | { | |
432 | switch (tgt->action) { | |
433 | case IBMVFC_TGT_ACTION_DEL_RPORT: | |
434 | break; | |
435 | default: | |
43c8da90 BK |
436 | if (action == IBMVFC_TGT_ACTION_DEL_RPORT) |
437 | tgt->add_rport = 0; | |
072b91f9 BK |
438 | tgt->action = action; |
439 | break; | |
440 | } | |
441 | } | |
442 | ||
443 | /** | |
444 | * ibmvfc_set_host_state - Set the state for the host | |
445 | * @vhost: ibmvfc host struct | |
446 | * @state: state to set host to | |
447 | * | |
448 | * Returns: | |
449 | * 0 if state changed / non-zero if not changed | |
450 | **/ | |
451 | static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, | |
452 | enum ibmvfc_host_state state) | |
453 | { | |
454 | int rc = 0; | |
455 | ||
456 | switch (vhost->state) { | |
457 | case IBMVFC_HOST_OFFLINE: | |
458 | rc = -EINVAL; | |
459 | break; | |
460 | default: | |
461 | vhost->state = state; | |
462 | break; | |
463 | }; | |
464 | ||
465 | return rc; | |
466 | } | |
467 | ||
468 | /** | |
469 | * ibmvfc_set_host_action - Set the next init action for the host | |
470 | * @vhost: ibmvfc host struct | |
471 | * @action: action to perform | |
472 | * | |
473 | **/ | |
474 | static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, | |
475 | enum ibmvfc_host_action action) | |
476 | { | |
477 | switch (action) { | |
478 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: | |
479 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) | |
480 | vhost->action = action; | |
481 | break; | |
79111d08 BK |
482 | case IBMVFC_HOST_ACTION_LOGO_WAIT: |
483 | if (vhost->action == IBMVFC_HOST_ACTION_LOGO) | |
484 | vhost->action = action; | |
485 | break; | |
072b91f9 BK |
486 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
487 | if (vhost->action == IBMVFC_HOST_ACTION_INIT) | |
488 | vhost->action = action; | |
489 | break; | |
490 | case IBMVFC_HOST_ACTION_QUERY: | |
491 | switch (vhost->action) { | |
492 | case IBMVFC_HOST_ACTION_INIT_WAIT: | |
493 | case IBMVFC_HOST_ACTION_NONE: | |
43c8da90 | 494 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 BK |
495 | vhost->action = action; |
496 | break; | |
497 | default: | |
498 | break; | |
499 | }; | |
500 | break; | |
501 | case IBMVFC_HOST_ACTION_TGT_INIT: | |
502 | if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) | |
503 | vhost->action = action; | |
504 | break; | |
79111d08 | 505 | case IBMVFC_HOST_ACTION_LOGO: |
072b91f9 BK |
506 | case IBMVFC_HOST_ACTION_INIT: |
507 | case IBMVFC_HOST_ACTION_TGT_DEL: | |
508 | case IBMVFC_HOST_ACTION_QUERY_TGTS: | |
10e79499 | 509 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 BK |
510 | case IBMVFC_HOST_ACTION_NONE: |
511 | default: | |
512 | vhost->action = action; | |
513 | break; | |
514 | }; | |
515 | } | |
516 | ||
517 | /** | |
518 | * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) | |
519 | * @vhost: ibmvfc host struct | |
520 | * | |
521 | * Return value: | |
522 | * nothing | |
523 | **/ | |
524 | static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) | |
525 | { | |
526 | if (vhost->action == IBMVFC_HOST_ACTION_NONE) { | |
2d0da2a4 BK |
527 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
528 | scsi_block_requests(vhost->host); | |
529 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); | |
530 | } | |
072b91f9 BK |
531 | } else |
532 | vhost->reinit = 1; | |
533 | ||
534 | wake_up(&vhost->work_wait_q); | |
535 | } | |
536 | ||
537 | /** | |
538 | * ibmvfc_link_down - Handle a link down event from the adapter | |
539 | * @vhost: ibmvfc host struct | |
540 | * @state: ibmvfc host state to enter | |
541 | * | |
542 | **/ | |
543 | static void ibmvfc_link_down(struct ibmvfc_host *vhost, | |
544 | enum ibmvfc_host_state state) | |
545 | { | |
546 | struct ibmvfc_target *tgt; | |
547 | ||
548 | ENTER; | |
549 | scsi_block_requests(vhost->host); | |
550 | list_for_each_entry(tgt, &vhost->targets, queue) | |
551 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
552 | ibmvfc_set_host_state(vhost, state); | |
553 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); | |
554 | vhost->events_to_log |= IBMVFC_AE_LINKDOWN; | |
555 | wake_up(&vhost->work_wait_q); | |
556 | LEAVE; | |
557 | } | |
558 | ||
559 | /** | |
560 | * ibmvfc_init_host - Start host initialization | |
561 | * @vhost: ibmvfc host struct | |
562 | * | |
563 | * Return value: | |
564 | * nothing | |
565 | **/ | |
861890c6 | 566 | static void ibmvfc_init_host(struct ibmvfc_host *vhost) |
072b91f9 BK |
567 | { |
568 | struct ibmvfc_target *tgt; | |
569 | ||
570 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { | |
1c41fa82 | 571 | if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { |
072b91f9 BK |
572 | dev_err(vhost->dev, |
573 | "Host initialization retries exceeded. Taking adapter offline\n"); | |
574 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); | |
575 | return; | |
576 | } | |
577 | } | |
578 | ||
579 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { | |
861890c6 BK |
580 | memset(vhost->async_crq.msgs, 0, PAGE_SIZE); |
581 | vhost->async_crq.cur = 0; | |
cf6f10d7 | 582 | |
072b91f9 | 583 | list_for_each_entry(tgt, &vhost->targets, queue) |
5e47167b | 584 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
072b91f9 BK |
585 | scsi_block_requests(vhost->host); |
586 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); | |
587 | vhost->job_step = ibmvfc_npiv_login; | |
588 | wake_up(&vhost->work_wait_q); | |
589 | } | |
590 | } | |
591 | ||
592 | /** | |
593 | * ibmvfc_send_crq - Send a CRQ | |
594 | * @vhost: ibmvfc host struct | |
595 | * @word1: the first 64 bits of the data | |
596 | * @word2: the second 64 bits of the data | |
597 | * | |
598 | * Return value: | |
599 | * 0 on success / other on failure | |
600 | **/ | |
601 | static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) | |
602 | { | |
603 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
604 | return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); | |
605 | } | |
606 | ||
607 | /** | |
608 | * ibmvfc_send_crq_init - Send a CRQ init message | |
609 | * @vhost: ibmvfc host struct | |
610 | * | |
611 | * Return value: | |
612 | * 0 on success / other on failure | |
613 | **/ | |
614 | static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) | |
615 | { | |
616 | ibmvfc_dbg(vhost, "Sending CRQ init\n"); | |
617 | return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); | |
618 | } | |
619 | ||
620 | /** | |
621 | * ibmvfc_send_crq_init_complete - Send a CRQ init complete message | |
622 | * @vhost: ibmvfc host struct | |
623 | * | |
624 | * Return value: | |
625 | * 0 on success / other on failure | |
626 | **/ | |
627 | static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) | |
628 | { | |
629 | ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); | |
630 | return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); | |
631 | } | |
632 | ||
633 | /** | |
634 | * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ | |
635 | * @vhost: ibmvfc host struct | |
636 | * | |
637 | * Frees irq, deallocates a page for messages, unmaps dma, and unregisters | |
638 | * the crq with the hypervisor. | |
639 | **/ | |
640 | static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) | |
641 | { | |
642 | long rc; | |
643 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
644 | struct ibmvfc_crq_queue *crq = &vhost->crq; | |
645 | ||
646 | ibmvfc_dbg(vhost, "Releasing CRQ\n"); | |
647 | free_irq(vdev->irq, vhost); | |
039a0898 | 648 | tasklet_kill(&vhost->tasklet); |
072b91f9 BK |
649 | do { |
650 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); | |
651 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
652 | ||
653 | vhost->state = IBMVFC_NO_CRQ; | |
79111d08 | 654 | vhost->logged_in = 0; |
072b91f9 BK |
655 | dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); |
656 | free_page((unsigned long)crq->msgs); | |
657 | } | |
658 | ||
659 | /** | |
660 | * ibmvfc_reenable_crq_queue - reenables the CRQ | |
661 | * @vhost: ibmvfc host struct | |
662 | * | |
663 | * Return value: | |
664 | * 0 on success / other on failure | |
665 | **/ | |
666 | static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) | |
667 | { | |
668 | int rc; | |
669 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
670 | ||
671 | /* Re-enable the CRQ */ | |
672 | do { | |
673 | rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); | |
674 | } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
675 | ||
676 | if (rc) | |
677 | dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); | |
678 | ||
679 | return rc; | |
680 | } | |
681 | ||
682 | /** | |
683 | * ibmvfc_reset_crq - resets a crq after a failure | |
684 | * @vhost: ibmvfc host struct | |
685 | * | |
686 | * Return value: | |
687 | * 0 on success / other on failure | |
688 | **/ | |
689 | static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) | |
690 | { | |
691 | int rc; | |
692 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
693 | struct ibmvfc_crq_queue *crq = &vhost->crq; | |
694 | ||
695 | /* Close the CRQ */ | |
696 | do { | |
697 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); | |
698 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
699 | ||
700 | vhost->state = IBMVFC_NO_CRQ; | |
79111d08 | 701 | vhost->logged_in = 0; |
072b91f9 BK |
702 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
703 | ||
704 | /* Clean out the queue */ | |
705 | memset(crq->msgs, 0, PAGE_SIZE); | |
706 | crq->cur = 0; | |
707 | ||
708 | /* And re-open it again */ | |
709 | rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, | |
710 | crq->msg_token, PAGE_SIZE); | |
711 | ||
712 | if (rc == H_CLOSED) | |
713 | /* Adapter is good, but other end is not ready */ | |
714 | dev_warn(vhost->dev, "Partner adapter not ready\n"); | |
715 | else if (rc != 0) | |
716 | dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); | |
717 | ||
718 | return rc; | |
719 | } | |
720 | ||
721 | /** | |
722 | * ibmvfc_valid_event - Determines if event is valid. | |
723 | * @pool: event_pool that contains the event | |
724 | * @evt: ibmvfc event to be checked for validity | |
725 | * | |
726 | * Return value: | |
727 | * 1 if event is valid / 0 if event is not valid | |
728 | **/ | |
729 | static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, | |
730 | struct ibmvfc_event *evt) | |
731 | { | |
732 | int index = evt - pool->events; | |
733 | if (index < 0 || index >= pool->size) /* outside of bounds */ | |
734 | return 0; | |
735 | if (evt != pool->events + index) /* unaligned */ | |
736 | return 0; | |
737 | return 1; | |
738 | } | |
739 | ||
740 | /** | |
741 | * ibmvfc_free_event - Free the specified event | |
742 | * @evt: ibmvfc_event to be freed | |
743 | * | |
744 | **/ | |
745 | static void ibmvfc_free_event(struct ibmvfc_event *evt) | |
746 | { | |
747 | struct ibmvfc_host *vhost = evt->vhost; | |
748 | struct ibmvfc_event_pool *pool = &vhost->pool; | |
749 | ||
750 | BUG_ON(!ibmvfc_valid_event(pool, evt)); | |
751 | BUG_ON(atomic_inc_return(&evt->free) != 1); | |
752 | list_add_tail(&evt->queue, &vhost->free); | |
753 | } | |
754 | ||
755 | /** | |
756 | * ibmvfc_scsi_eh_done - EH done function for queuecommand commands | |
757 | * @evt: ibmvfc event struct | |
758 | * | |
759 | * This function does not setup any error status, that must be done | |
760 | * before this function gets called. | |
761 | **/ | |
762 | static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) | |
763 | { | |
764 | struct scsi_cmnd *cmnd = evt->cmnd; | |
765 | ||
766 | if (cmnd) { | |
767 | scsi_dma_unmap(cmnd); | |
768 | cmnd->scsi_done(cmnd); | |
769 | } | |
770 | ||
ad8dcffa BK |
771 | if (evt->eh_comp) |
772 | complete(evt->eh_comp); | |
773 | ||
072b91f9 BK |
774 | ibmvfc_free_event(evt); |
775 | } | |
776 | ||
777 | /** | |
778 | * ibmvfc_fail_request - Fail request with specified error code | |
779 | * @evt: ibmvfc event struct | |
780 | * @error_code: error code to fail request with | |
781 | * | |
782 | * Return value: | |
783 | * none | |
784 | **/ | |
785 | static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) | |
786 | { | |
787 | if (evt->cmnd) { | |
788 | evt->cmnd->result = (error_code << 16); | |
789 | evt->done = ibmvfc_scsi_eh_done; | |
790 | } else | |
791 | evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; | |
792 | ||
793 | list_del(&evt->queue); | |
794 | del_timer(&evt->timer); | |
795 | ibmvfc_trc_end(evt); | |
796 | evt->done(evt); | |
797 | } | |
798 | ||
799 | /** | |
800 | * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests | |
801 | * @vhost: ibmvfc host struct | |
802 | * @error_code: error code to fail requests with | |
803 | * | |
804 | * Return value: | |
805 | * none | |
806 | **/ | |
807 | static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) | |
808 | { | |
809 | struct ibmvfc_event *evt, *pos; | |
810 | ||
811 | ibmvfc_dbg(vhost, "Purging all requests\n"); | |
812 | list_for_each_entry_safe(evt, pos, &vhost->sent, queue) | |
813 | ibmvfc_fail_request(evt, error_code); | |
814 | } | |
815 | ||
816 | /** | |
79111d08 | 817 | * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ |
072b91f9 BK |
818 | * @vhost: struct ibmvfc host to reset |
819 | **/ | |
79111d08 | 820 | static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) |
072b91f9 BK |
821 | { |
822 | int rc; | |
823 | ||
824 | scsi_block_requests(vhost->host); | |
825 | ibmvfc_purge_requests(vhost, DID_ERROR); | |
826 | if ((rc = ibmvfc_reset_crq(vhost)) || | |
827 | (rc = ibmvfc_send_crq_init(vhost)) || | |
828 | (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { | |
829 | dev_err(vhost->dev, "Error after reset rc=%d\n", rc); | |
830 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
831 | } else | |
832 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
833 | } | |
834 | ||
835 | /** | |
79111d08 | 836 | * __ibmvfc_reset_host - Reset the connection to the server (no locking) |
072b91f9 BK |
837 | * @vhost: struct ibmvfc host to reset |
838 | **/ | |
79111d08 BK |
839 | static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) |
840 | { | |
841 | if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && | |
842 | !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { | |
843 | scsi_block_requests(vhost->host); | |
844 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); | |
845 | vhost->job_step = ibmvfc_npiv_logout; | |
846 | wake_up(&vhost->work_wait_q); | |
847 | } else | |
848 | ibmvfc_hard_reset_host(vhost); | |
849 | } | |
850 | ||
851 | /** | |
852 | * ibmvfc_reset_host - Reset the connection to the server | |
853 | * @vhost: ibmvfc host struct | |
854 | **/ | |
072b91f9 BK |
855 | static void ibmvfc_reset_host(struct ibmvfc_host *vhost) |
856 | { | |
857 | unsigned long flags; | |
858 | ||
859 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
860 | __ibmvfc_reset_host(vhost); | |
861 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
862 | } | |
863 | ||
864 | /** | |
865 | * ibmvfc_retry_host_init - Retry host initialization if allowed | |
866 | * @vhost: ibmvfc host struct | |
867 | * | |
7d0e4622 BK |
868 | * Returns: 1 if init will be retried / 0 if not |
869 | * | |
072b91f9 | 870 | **/ |
7d0e4622 | 871 | static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) |
072b91f9 | 872 | { |
7d0e4622 BK |
873 | int retry = 0; |
874 | ||
072b91f9 | 875 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { |
1c41fa82 BK |
876 | vhost->delay_init = 1; |
877 | if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { | |
072b91f9 BK |
878 | dev_err(vhost->dev, |
879 | "Host initialization retries exceeded. Taking adapter offline\n"); | |
880 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); | |
1c41fa82 | 881 | } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) |
072b91f9 | 882 | __ibmvfc_reset_host(vhost); |
7d0e4622 | 883 | else { |
072b91f9 | 884 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
7d0e4622 BK |
885 | retry = 1; |
886 | } | |
072b91f9 BK |
887 | } |
888 | ||
889 | wake_up(&vhost->work_wait_q); | |
7d0e4622 | 890 | return retry; |
072b91f9 BK |
891 | } |
892 | ||
893 | /** | |
b3c10489 | 894 | * __ibmvfc_get_target - Find the specified scsi_target (no locking) |
072b91f9 BK |
895 | * @starget: scsi target struct |
896 | * | |
897 | * Return value: | |
898 | * ibmvfc_target struct / NULL if not found | |
899 | **/ | |
b3c10489 | 900 | static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) |
072b91f9 BK |
901 | { |
902 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
903 | struct ibmvfc_host *vhost = shost_priv(shost); | |
904 | struct ibmvfc_target *tgt; | |
905 | ||
906 | list_for_each_entry(tgt, &vhost->targets, queue) | |
b3c10489 BK |
907 | if (tgt->target_id == starget->id) { |
908 | kref_get(&tgt->kref); | |
072b91f9 | 909 | return tgt; |
b3c10489 | 910 | } |
072b91f9 BK |
911 | return NULL; |
912 | } | |
913 | ||
914 | /** | |
b3c10489 | 915 | * ibmvfc_get_target - Find the specified scsi_target |
072b91f9 BK |
916 | * @starget: scsi target struct |
917 | * | |
918 | * Return value: | |
919 | * ibmvfc_target struct / NULL if not found | |
920 | **/ | |
b3c10489 | 921 | static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) |
072b91f9 BK |
922 | { |
923 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
924 | struct ibmvfc_target *tgt; | |
925 | unsigned long flags; | |
926 | ||
927 | spin_lock_irqsave(shost->host_lock, flags); | |
b3c10489 | 928 | tgt = __ibmvfc_get_target(starget); |
072b91f9 BK |
929 | spin_unlock_irqrestore(shost->host_lock, flags); |
930 | return tgt; | |
931 | } | |
932 | ||
933 | /** | |
934 | * ibmvfc_get_host_speed - Get host port speed | |
935 | * @shost: scsi host struct | |
936 | * | |
937 | * Return value: | |
938 | * none | |
939 | **/ | |
940 | static void ibmvfc_get_host_speed(struct Scsi_Host *shost) | |
941 | { | |
942 | struct ibmvfc_host *vhost = shost_priv(shost); | |
943 | unsigned long flags; | |
944 | ||
945 | spin_lock_irqsave(shost->host_lock, flags); | |
946 | if (vhost->state == IBMVFC_ACTIVE) { | |
947 | switch (vhost->login_buf->resp.link_speed / 100) { | |
948 | case 1: | |
949 | fc_host_speed(shost) = FC_PORTSPEED_1GBIT; | |
950 | break; | |
951 | case 2: | |
952 | fc_host_speed(shost) = FC_PORTSPEED_2GBIT; | |
953 | break; | |
954 | case 4: | |
955 | fc_host_speed(shost) = FC_PORTSPEED_4GBIT; | |
956 | break; | |
957 | case 8: | |
958 | fc_host_speed(shost) = FC_PORTSPEED_8GBIT; | |
959 | break; | |
960 | case 10: | |
961 | fc_host_speed(shost) = FC_PORTSPEED_10GBIT; | |
962 | break; | |
963 | case 16: | |
964 | fc_host_speed(shost) = FC_PORTSPEED_16GBIT; | |
965 | break; | |
966 | default: | |
775a42ec | 967 | ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", |
072b91f9 BK |
968 | vhost->login_buf->resp.link_speed / 100); |
969 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; | |
970 | break; | |
971 | } | |
972 | } else | |
973 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; | |
974 | spin_unlock_irqrestore(shost->host_lock, flags); | |
975 | } | |
976 | ||
977 | /** | |
978 | * ibmvfc_get_host_port_state - Get host port state | |
979 | * @shost: scsi host struct | |
980 | * | |
981 | * Return value: | |
982 | * none | |
983 | **/ | |
984 | static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) | |
985 | { | |
986 | struct ibmvfc_host *vhost = shost_priv(shost); | |
987 | unsigned long flags; | |
988 | ||
989 | spin_lock_irqsave(shost->host_lock, flags); | |
990 | switch (vhost->state) { | |
991 | case IBMVFC_INITIALIZING: | |
992 | case IBMVFC_ACTIVE: | |
993 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
994 | break; | |
995 | case IBMVFC_LINK_DOWN: | |
996 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
997 | break; | |
998 | case IBMVFC_LINK_DEAD: | |
999 | case IBMVFC_HOST_OFFLINE: | |
1000 | fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; | |
1001 | break; | |
1002 | case IBMVFC_HALTED: | |
1003 | fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; | |
1004 | break; | |
0ae808e0 BK |
1005 | case IBMVFC_NO_CRQ: |
1006 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
1007 | break; | |
072b91f9 BK |
1008 | default: |
1009 | ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); | |
1010 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
1011 | break; | |
1012 | } | |
1013 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1014 | } | |
1015 | ||
1016 | /** | |
1017 | * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout | |
1018 | * @rport: rport struct | |
1019 | * @timeout: timeout value | |
1020 | * | |
1021 | * Return value: | |
1022 | * none | |
1023 | **/ | |
1024 | static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) | |
1025 | { | |
1026 | if (timeout) | |
1027 | rport->dev_loss_tmo = timeout; | |
1028 | else | |
1029 | rport->dev_loss_tmo = 1; | |
1030 | } | |
1031 | ||
b3c10489 BK |
1032 | /** |
1033 | * ibmvfc_release_tgt - Free memory allocated for a target | |
1034 | * @kref: kref struct | |
1035 | * | |
1036 | **/ | |
1037 | static void ibmvfc_release_tgt(struct kref *kref) | |
1038 | { | |
1039 | struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); | |
1040 | kfree(tgt); | |
1041 | } | |
1042 | ||
072b91f9 BK |
1043 | /** |
1044 | * ibmvfc_get_starget_node_name - Get SCSI target's node name | |
1045 | * @starget: scsi target struct | |
1046 | * | |
1047 | * Return value: | |
1048 | * none | |
1049 | **/ | |
1050 | static void ibmvfc_get_starget_node_name(struct scsi_target *starget) | |
1051 | { | |
b3c10489 | 1052 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1053 | fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; |
b3c10489 BK |
1054 | if (tgt) |
1055 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1056 | } |
1057 | ||
1058 | /** | |
1059 | * ibmvfc_get_starget_port_name - Get SCSI target's port name | |
1060 | * @starget: scsi target struct | |
1061 | * | |
1062 | * Return value: | |
1063 | * none | |
1064 | **/ | |
1065 | static void ibmvfc_get_starget_port_name(struct scsi_target *starget) | |
1066 | { | |
b3c10489 | 1067 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1068 | fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; |
b3c10489 BK |
1069 | if (tgt) |
1070 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1071 | } |
1072 | ||
1073 | /** | |
1074 | * ibmvfc_get_starget_port_id - Get SCSI target's port ID | |
1075 | * @starget: scsi target struct | |
1076 | * | |
1077 | * Return value: | |
1078 | * none | |
1079 | **/ | |
1080 | static void ibmvfc_get_starget_port_id(struct scsi_target *starget) | |
1081 | { | |
b3c10489 | 1082 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1083 | fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; |
b3c10489 BK |
1084 | if (tgt) |
1085 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1086 | } |
1087 | ||
1088 | /** | |
1089 | * ibmvfc_wait_while_resetting - Wait while the host resets | |
1090 | * @vhost: ibmvfc host struct | |
1091 | * | |
1092 | * Return value: | |
1093 | * 0 on success / other on failure | |
1094 | **/ | |
1095 | static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) | |
1096 | { | |
1097 | long timeout = wait_event_timeout(vhost->init_wait_q, | |
3eddc569 BK |
1098 | ((vhost->state == IBMVFC_ACTIVE || |
1099 | vhost->state == IBMVFC_HOST_OFFLINE || | |
1100 | vhost->state == IBMVFC_LINK_DEAD) && | |
1101 | vhost->action == IBMVFC_HOST_ACTION_NONE), | |
072b91f9 BK |
1102 | (init_timeout * HZ)); |
1103 | ||
1104 | return timeout ? 0 : -EIO; | |
1105 | } | |
1106 | ||
1107 | /** | |
1108 | * ibmvfc_issue_fc_host_lip - Re-initiate link initialization | |
1109 | * @shost: scsi host struct | |
1110 | * | |
1111 | * Return value: | |
1112 | * 0 on success / other on failure | |
1113 | **/ | |
1114 | static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) | |
1115 | { | |
1116 | struct ibmvfc_host *vhost = shost_priv(shost); | |
1117 | ||
1118 | dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); | |
1119 | ibmvfc_reset_host(vhost); | |
1120 | return ibmvfc_wait_while_resetting(vhost); | |
1121 | } | |
1122 | ||
1123 | /** | |
1124 | * ibmvfc_gather_partition_info - Gather info about the LPAR | |
1125 | * | |
1126 | * Return value: | |
1127 | * none | |
1128 | **/ | |
1129 | static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) | |
1130 | { | |
1131 | struct device_node *rootdn; | |
1132 | const char *name; | |
1133 | const unsigned int *num; | |
1134 | ||
1135 | rootdn = of_find_node_by_path("/"); | |
1136 | if (!rootdn) | |
1137 | return; | |
1138 | ||
1139 | name = of_get_property(rootdn, "ibm,partition-name", NULL); | |
1140 | if (name) | |
1141 | strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); | |
1142 | num = of_get_property(rootdn, "ibm,partition-no", NULL); | |
1143 | if (num) | |
1144 | vhost->partition_number = *num; | |
1145 | of_node_put(rootdn); | |
1146 | } | |
1147 | ||
1148 | /** | |
1149 | * ibmvfc_set_login_info - Setup info for NPIV login | |
1150 | * @vhost: ibmvfc host struct | |
1151 | * | |
1152 | * Return value: | |
1153 | * none | |
1154 | **/ | |
1155 | static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) | |
1156 | { | |
1157 | struct ibmvfc_npiv_login *login_info = &vhost->login_info; | |
1158 | struct device_node *of_node = vhost->dev->archdata.of_node; | |
1159 | const char *location; | |
1160 | ||
1161 | memset(login_info, 0, sizeof(*login_info)); | |
1162 | ||
1163 | login_info->ostype = IBMVFC_OS_LINUX; | |
1164 | login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; | |
1165 | login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); | |
1166 | login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); | |
1167 | login_info->partition_num = vhost->partition_number; | |
1168 | login_info->vfc_frame_version = 1; | |
1169 | login_info->fcp_version = 3; | |
497f9c50 | 1170 | login_info->flags = IBMVFC_FLUSH_ON_HALT; |
072b91f9 | 1171 | if (vhost->client_migrated) |
497f9c50 | 1172 | login_info->flags |= IBMVFC_CLIENT_MIGRATED; |
072b91f9 BK |
1173 | |
1174 | login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; | |
1175 | login_info->capabilities = IBMVFC_CAN_MIGRATE; | |
1176 | login_info->async.va = vhost->async_crq.msg_token; | |
52d7e861 | 1177 | login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); |
072b91f9 BK |
1178 | strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); |
1179 | strncpy(login_info->device_name, | |
71610f55 | 1180 | dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); |
072b91f9 BK |
1181 | |
1182 | location = of_get_property(of_node, "ibm,loc-code", NULL); | |
71610f55 | 1183 | location = location ? location : dev_name(vhost->dev); |
072b91f9 BK |
1184 | strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); |
1185 | } | |
1186 | ||
1187 | /** | |
1188 | * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host | |
1189 | * @vhost: ibmvfc host who owns the event pool | |
1190 | * | |
1191 | * Returns zero on success. | |
1192 | **/ | |
1193 | static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) | |
1194 | { | |
1195 | int i; | |
1196 | struct ibmvfc_event_pool *pool = &vhost->pool; | |
1197 | ||
1198 | ENTER; | |
1199 | pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; | |
1200 | pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); | |
1201 | if (!pool->events) | |
1202 | return -ENOMEM; | |
1203 | ||
1204 | pool->iu_storage = dma_alloc_coherent(vhost->dev, | |
1205 | pool->size * sizeof(*pool->iu_storage), | |
1206 | &pool->iu_token, 0); | |
1207 | ||
1208 | if (!pool->iu_storage) { | |
1209 | kfree(pool->events); | |
1210 | return -ENOMEM; | |
1211 | } | |
1212 | ||
1213 | for (i = 0; i < pool->size; ++i) { | |
1214 | struct ibmvfc_event *evt = &pool->events[i]; | |
1215 | atomic_set(&evt->free, 1); | |
1216 | evt->crq.valid = 0x80; | |
1217 | evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); | |
1218 | evt->xfer_iu = pool->iu_storage + i; | |
1219 | evt->vhost = vhost; | |
1220 | evt->ext_list = NULL; | |
1221 | list_add_tail(&evt->queue, &vhost->free); | |
1222 | } | |
1223 | ||
1224 | LEAVE; | |
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | /** | |
1229 | * ibmvfc_free_event_pool - Frees memory of the event pool of a host | |
1230 | * @vhost: ibmvfc host who owns the event pool | |
1231 | * | |
1232 | **/ | |
1233 | static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) | |
1234 | { | |
1235 | int i; | |
1236 | struct ibmvfc_event_pool *pool = &vhost->pool; | |
1237 | ||
1238 | ENTER; | |
1239 | for (i = 0; i < pool->size; ++i) { | |
1240 | list_del(&pool->events[i].queue); | |
1241 | BUG_ON(atomic_read(&pool->events[i].free) != 1); | |
1242 | if (pool->events[i].ext_list) | |
1243 | dma_pool_free(vhost->sg_pool, | |
1244 | pool->events[i].ext_list, | |
1245 | pool->events[i].ext_list_token); | |
1246 | } | |
1247 | ||
1248 | kfree(pool->events); | |
1249 | dma_free_coherent(vhost->dev, | |
1250 | pool->size * sizeof(*pool->iu_storage), | |
1251 | pool->iu_storage, pool->iu_token); | |
1252 | LEAVE; | |
1253 | } | |
1254 | ||
1255 | /** | |
1256 | * ibmvfc_get_event - Gets the next free event in pool | |
1257 | * @vhost: ibmvfc host struct | |
1258 | * | |
1259 | * Returns a free event from the pool. | |
1260 | **/ | |
1261 | static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) | |
1262 | { | |
1263 | struct ibmvfc_event *evt; | |
1264 | ||
1265 | BUG_ON(list_empty(&vhost->free)); | |
1266 | evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); | |
1267 | atomic_set(&evt->free, 0); | |
1268 | list_del(&evt->queue); | |
1269 | return evt; | |
1270 | } | |
1271 | ||
1272 | /** | |
1273 | * ibmvfc_init_event - Initialize fields in an event struct that are always | |
1274 | * required. | |
1275 | * @evt: The event | |
1276 | * @done: Routine to call when the event is responded to | |
1277 | * @format: SRP or MAD format | |
1278 | **/ | |
1279 | static void ibmvfc_init_event(struct ibmvfc_event *evt, | |
1280 | void (*done) (struct ibmvfc_event *), u8 format) | |
1281 | { | |
1282 | evt->cmnd = NULL; | |
1283 | evt->sync_iu = NULL; | |
1284 | evt->crq.format = format; | |
1285 | evt->done = done; | |
ad8dcffa | 1286 | evt->eh_comp = NULL; |
072b91f9 BK |
1287 | } |
1288 | ||
1289 | /** | |
1290 | * ibmvfc_map_sg_list - Initialize scatterlist | |
1291 | * @scmd: scsi command struct | |
1292 | * @nseg: number of scatterlist segments | |
1293 | * @md: memory descriptor list to initialize | |
1294 | **/ | |
1295 | static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, | |
1296 | struct srp_direct_buf *md) | |
1297 | { | |
1298 | int i; | |
1299 | struct scatterlist *sg; | |
1300 | ||
1301 | scsi_for_each_sg(scmd, sg, nseg, i) { | |
1302 | md[i].va = sg_dma_address(sg); | |
1303 | md[i].len = sg_dma_len(sg); | |
1304 | md[i].key = 0; | |
1305 | } | |
1306 | } | |
1307 | ||
1308 | /** | |
1309 | * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields | |
1310 | * @scmd: Scsi_Cmnd with the scatterlist | |
1311 | * @evt: ibmvfc event struct | |
1312 | * @vfc_cmd: vfc_cmd that contains the memory descriptor | |
1313 | * @dev: device for which to map dma memory | |
1314 | * | |
1315 | * Returns: | |
1316 | * 0 on success / non-zero on failure | |
1317 | **/ | |
1318 | static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, | |
1319 | struct ibmvfc_event *evt, | |
1320 | struct ibmvfc_cmd *vfc_cmd, struct device *dev) | |
1321 | { | |
1322 | ||
1323 | int sg_mapped; | |
1324 | struct srp_direct_buf *data = &vfc_cmd->ioba; | |
1325 | struct ibmvfc_host *vhost = dev_get_drvdata(dev); | |
1326 | ||
1327 | sg_mapped = scsi_dma_map(scmd); | |
1328 | if (!sg_mapped) { | |
1329 | vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; | |
1330 | return 0; | |
1331 | } else if (unlikely(sg_mapped < 0)) { | |
1332 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1333 | scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); | |
1334 | return sg_mapped; | |
1335 | } | |
1336 | ||
1337 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { | |
1338 | vfc_cmd->flags |= IBMVFC_WRITE; | |
1339 | vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; | |
1340 | } else { | |
1341 | vfc_cmd->flags |= IBMVFC_READ; | |
1342 | vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; | |
1343 | } | |
1344 | ||
1345 | if (sg_mapped == 1) { | |
1346 | ibmvfc_map_sg_list(scmd, sg_mapped, data); | |
1347 | return 0; | |
1348 | } | |
1349 | ||
1350 | vfc_cmd->flags |= IBMVFC_SCATTERLIST; | |
1351 | ||
1352 | if (!evt->ext_list) { | |
1353 | evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, | |
1354 | &evt->ext_list_token); | |
1355 | ||
1356 | if (!evt->ext_list) { | |
64b840dd BK |
1357 | scsi_dma_unmap(scmd); |
1358 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1359 | scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); | |
072b91f9 BK |
1360 | return -ENOMEM; |
1361 | } | |
1362 | } | |
1363 | ||
1364 | ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); | |
1365 | ||
1366 | data->va = evt->ext_list_token; | |
1367 | data->len = sg_mapped * sizeof(struct srp_direct_buf); | |
1368 | data->key = 0; | |
1369 | return 0; | |
1370 | } | |
1371 | ||
1372 | /** | |
1373 | * ibmvfc_timeout - Internal command timeout handler | |
1374 | * @evt: struct ibmvfc_event that timed out | |
1375 | * | |
1376 | * Called when an internally generated command times out | |
1377 | **/ | |
1378 | static void ibmvfc_timeout(struct ibmvfc_event *evt) | |
1379 | { | |
1380 | struct ibmvfc_host *vhost = evt->vhost; | |
1381 | dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); | |
1382 | ibmvfc_reset_host(vhost); | |
1383 | } | |
1384 | ||
1385 | /** | |
1386 | * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() | |
1387 | * @evt: event to be sent | |
1388 | * @vhost: ibmvfc host struct | |
1389 | * @timeout: timeout in seconds - 0 means do not time command | |
1390 | * | |
1391 | * Returns the value returned from ibmvfc_send_crq(). (Zero for success) | |
1392 | **/ | |
1393 | static int ibmvfc_send_event(struct ibmvfc_event *evt, | |
1394 | struct ibmvfc_host *vhost, unsigned long timeout) | |
1395 | { | |
1396 | u64 *crq_as_u64 = (u64 *) &evt->crq; | |
1397 | int rc; | |
1398 | ||
1399 | /* Copy the IU into the transfer area */ | |
1400 | *evt->xfer_iu = evt->iu; | |
1401 | if (evt->crq.format == IBMVFC_CMD_FORMAT) | |
1402 | evt->xfer_iu->cmd.tag = (u64)evt; | |
1403 | else if (evt->crq.format == IBMVFC_MAD_FORMAT) | |
1404 | evt->xfer_iu->mad_common.tag = (u64)evt; | |
1405 | else | |
1406 | BUG(); | |
1407 | ||
1408 | list_add_tail(&evt->queue, &vhost->sent); | |
1409 | init_timer(&evt->timer); | |
1410 | ||
1411 | if (timeout) { | |
1412 | evt->timer.data = (unsigned long) evt; | |
1413 | evt->timer.expires = jiffies + (timeout * HZ); | |
1414 | evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; | |
1415 | add_timer(&evt->timer); | |
1416 | } | |
1417 | ||
a528ab7a BK |
1418 | mb(); |
1419 | ||
072b91f9 BK |
1420 | if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { |
1421 | list_del(&evt->queue); | |
1422 | del_timer(&evt->timer); | |
1423 | ||
1424 | /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. | |
1425 | * Firmware will send a CRQ with a transport event (0xFF) to | |
1426 | * tell this client what has happened to the transport. This | |
1427 | * will be handled in ibmvfc_handle_crq() | |
1428 | */ | |
1429 | if (rc == H_CLOSED) { | |
1430 | if (printk_ratelimit()) | |
1431 | dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); | |
1432 | if (evt->cmnd) | |
1433 | scsi_dma_unmap(evt->cmnd); | |
1434 | ibmvfc_free_event(evt); | |
1435 | return SCSI_MLQUEUE_HOST_BUSY; | |
1436 | } | |
1437 | ||
1438 | dev_err(vhost->dev, "Send error (rc=%d)\n", rc); | |
1439 | if (evt->cmnd) { | |
1440 | evt->cmnd->result = DID_ERROR << 16; | |
1441 | evt->done = ibmvfc_scsi_eh_done; | |
1442 | } else | |
1443 | evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; | |
1444 | ||
1445 | evt->done(evt); | |
1446 | } else | |
1447 | ibmvfc_trc_start(evt); | |
1448 | ||
1449 | return 0; | |
1450 | } | |
1451 | ||
1452 | /** | |
1453 | * ibmvfc_log_error - Log an error for the failed command if appropriate | |
1454 | * @evt: ibmvfc event to log | |
1455 | * | |
1456 | **/ | |
1457 | static void ibmvfc_log_error(struct ibmvfc_event *evt) | |
1458 | { | |
1459 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
1460 | struct ibmvfc_host *vhost = evt->vhost; | |
1461 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; | |
1462 | struct scsi_cmnd *cmnd = evt->cmnd; | |
1463 | const char *err = unknown_error; | |
1464 | int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); | |
1465 | int logerr = 0; | |
1466 | int rsp_code = 0; | |
1467 | ||
1468 | if (index >= 0) { | |
1469 | logerr = cmd_status[index].log; | |
1470 | err = cmd_status[index].name; | |
1471 | } | |
1472 | ||
0ae808e0 | 1473 | if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) |
072b91f9 BK |
1474 | return; |
1475 | ||
1476 | if (rsp->flags & FCP_RSP_LEN_VALID) | |
1477 | rsp_code = rsp->data.info.rsp_code; | |
1478 | ||
1479 | scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " | |
1480 | "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", | |
1481 | cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, | |
1482 | rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); | |
1483 | } | |
1484 | ||
6d29cc56 BK |
1485 | /** |
1486 | * ibmvfc_relogin - Log back into the specified device | |
1487 | * @sdev: scsi device struct | |
1488 | * | |
1489 | **/ | |
1490 | static void ibmvfc_relogin(struct scsi_device *sdev) | |
1491 | { | |
1492 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
1493 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
1494 | struct ibmvfc_target *tgt; | |
1495 | ||
1496 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
1497 | if (rport == tgt->rport) { | |
1498 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
1499 | break; | |
1500 | } | |
1501 | } | |
1502 | ||
1503 | ibmvfc_reinit_host(vhost); | |
1504 | } | |
1505 | ||
072b91f9 BK |
1506 | /** |
1507 | * ibmvfc_scsi_done - Handle responses from commands | |
1508 | * @evt: ibmvfc event to be handled | |
1509 | * | |
1510 | * Used as a callback when sending scsi cmds. | |
1511 | **/ | |
1512 | static void ibmvfc_scsi_done(struct ibmvfc_event *evt) | |
1513 | { | |
1514 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
1515 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; | |
1516 | struct scsi_cmnd *cmnd = evt->cmnd; | |
2bac406d BK |
1517 | u32 rsp_len = 0; |
1518 | u32 sense_len = rsp->fcp_sense_len; | |
072b91f9 BK |
1519 | |
1520 | if (cmnd) { | |
1521 | if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) | |
1522 | scsi_set_resid(cmnd, vfc_cmd->adapter_resid); | |
1523 | else if (rsp->flags & FCP_RESID_UNDER) | |
1524 | scsi_set_resid(cmnd, rsp->fcp_resid); | |
1525 | else | |
1526 | scsi_set_resid(cmnd, 0); | |
1527 | ||
1528 | if (vfc_cmd->status) { | |
1529 | cmnd->result = ibmvfc_get_err_result(vfc_cmd); | |
1530 | ||
1531 | if (rsp->flags & FCP_RSP_LEN_VALID) | |
1532 | rsp_len = rsp->fcp_rsp_len; | |
1533 | if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) | |
1534 | sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; | |
2bac406d | 1535 | if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) |
072b91f9 | 1536 | memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); |
646d3857 | 1537 | if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED)) |
6d29cc56 | 1538 | ibmvfc_relogin(cmnd->device); |
072b91f9 | 1539 | |
50119dad BK |
1540 | if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) |
1541 | cmnd->result = (DID_ERROR << 16); | |
1542 | ||
072b91f9 BK |
1543 | ibmvfc_log_error(evt); |
1544 | } | |
1545 | ||
1546 | if (!cmnd->result && | |
1547 | (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) | |
1548 | cmnd->result = (DID_ERROR << 16); | |
1549 | ||
1550 | scsi_dma_unmap(cmnd); | |
1551 | cmnd->scsi_done(cmnd); | |
1552 | } | |
1553 | ||
ad8dcffa BK |
1554 | if (evt->eh_comp) |
1555 | complete(evt->eh_comp); | |
1556 | ||
072b91f9 BK |
1557 | ibmvfc_free_event(evt); |
1558 | } | |
1559 | ||
1560 | /** | |
1561 | * ibmvfc_host_chkready - Check if the host can accept commands | |
1562 | * @vhost: struct ibmvfc host | |
1563 | * | |
1564 | * Returns: | |
1565 | * 1 if host can accept command / 0 if not | |
1566 | **/ | |
1567 | static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) | |
1568 | { | |
1569 | int result = 0; | |
1570 | ||
1571 | switch (vhost->state) { | |
1572 | case IBMVFC_LINK_DEAD: | |
1573 | case IBMVFC_HOST_OFFLINE: | |
1574 | result = DID_NO_CONNECT << 16; | |
1575 | break; | |
1576 | case IBMVFC_NO_CRQ: | |
1577 | case IBMVFC_INITIALIZING: | |
1578 | case IBMVFC_HALTED: | |
1579 | case IBMVFC_LINK_DOWN: | |
1580 | result = DID_REQUEUE << 16; | |
1581 | break; | |
1582 | case IBMVFC_ACTIVE: | |
1583 | result = 0; | |
1584 | break; | |
1585 | }; | |
1586 | ||
1587 | return result; | |
1588 | } | |
1589 | ||
1590 | /** | |
1591 | * ibmvfc_queuecommand - The queuecommand function of the scsi template | |
1592 | * @cmnd: struct scsi_cmnd to be executed | |
1593 | * @done: Callback function to be called when cmnd is completed | |
1594 | * | |
1595 | * Returns: | |
1596 | * 0 on success / other on failure | |
1597 | **/ | |
1598 | static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, | |
1599 | void (*done) (struct scsi_cmnd *)) | |
1600 | { | |
1601 | struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); | |
1602 | struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); | |
1603 | struct ibmvfc_cmd *vfc_cmd; | |
1604 | struct ibmvfc_event *evt; | |
1605 | u8 tag[2]; | |
1606 | int rc; | |
1607 | ||
1608 | if (unlikely((rc = fc_remote_port_chkready(rport))) || | |
1609 | unlikely((rc = ibmvfc_host_chkready(vhost)))) { | |
1610 | cmnd->result = rc; | |
1611 | done(cmnd); | |
1612 | return 0; | |
1613 | } | |
1614 | ||
1615 | cmnd->result = (DID_OK << 16); | |
1616 | evt = ibmvfc_get_event(vhost); | |
1617 | ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); | |
1618 | evt->cmnd = cmnd; | |
1619 | cmnd->scsi_done = done; | |
1620 | vfc_cmd = &evt->iu.cmd; | |
1621 | memset(vfc_cmd, 0, sizeof(*vfc_cmd)); | |
1622 | vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); | |
1623 | vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); | |
1624 | vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; | |
1625 | vfc_cmd->payload_len = sizeof(vfc_cmd->iu); | |
1626 | vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); | |
1627 | vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; | |
1628 | vfc_cmd->tgt_scsi_id = rport->port_id; | |
072b91f9 BK |
1629 | vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); |
1630 | int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); | |
1631 | memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); | |
1632 | ||
1633 | if (scsi_populate_tag_msg(cmnd, tag)) { | |
1634 | vfc_cmd->task_tag = tag[1]; | |
1635 | switch (tag[0]) { | |
1636 | case MSG_SIMPLE_TAG: | |
1637 | vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; | |
1638 | break; | |
1639 | case MSG_HEAD_TAG: | |
1640 | vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; | |
1641 | break; | |
1642 | case MSG_ORDERED_TAG: | |
1643 | vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; | |
1644 | break; | |
1645 | }; | |
1646 | } | |
1647 | ||
1648 | if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) | |
1649 | return ibmvfc_send_event(evt, vhost, 0); | |
1650 | ||
1651 | ibmvfc_free_event(evt); | |
1652 | if (rc == -ENOMEM) | |
1653 | return SCSI_MLQUEUE_HOST_BUSY; | |
1654 | ||
1655 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1656 | scmd_printk(KERN_ERR, cmnd, | |
1657 | "Failed to map DMA buffer for command. rc=%d\n", rc); | |
1658 | ||
1659 | cmnd->result = DID_ERROR << 16; | |
1660 | done(cmnd); | |
1661 | return 0; | |
1662 | } | |
1663 | ||
1664 | /** | |
1665 | * ibmvfc_sync_completion - Signal that a synchronous command has completed | |
1666 | * @evt: ibmvfc event struct | |
1667 | * | |
1668 | **/ | |
1669 | static void ibmvfc_sync_completion(struct ibmvfc_event *evt) | |
1670 | { | |
1671 | /* copy the response back */ | |
1672 | if (evt->sync_iu) | |
1673 | *evt->sync_iu = *evt->xfer_iu; | |
1674 | ||
1675 | complete(&evt->comp); | |
1676 | } | |
1677 | ||
d31429e1 BK |
1678 | /** |
1679 | * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands | |
1680 | * @evt: struct ibmvfc_event | |
1681 | * | |
1682 | **/ | |
1683 | static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) | |
1684 | { | |
1685 | struct ibmvfc_host *vhost = evt->vhost; | |
1686 | ||
1687 | ibmvfc_free_event(evt); | |
1688 | vhost->aborting_passthru = 0; | |
1689 | dev_info(vhost->dev, "Passthru command cancelled\n"); | |
1690 | } | |
1691 | ||
1692 | /** | |
1693 | * ibmvfc_bsg_timeout - Handle a BSG timeout | |
1694 | * @job: struct fc_bsg_job that timed out | |
1695 | * | |
1696 | * Returns: | |
1697 | * 0 on success / other on failure | |
1698 | **/ | |
1699 | static int ibmvfc_bsg_timeout(struct fc_bsg_job *job) | |
1700 | { | |
1701 | struct ibmvfc_host *vhost = shost_priv(job->shost); | |
1702 | unsigned long port_id = (unsigned long)job->dd_data; | |
1703 | struct ibmvfc_event *evt; | |
1704 | struct ibmvfc_tmf *tmf; | |
1705 | unsigned long flags; | |
1706 | int rc; | |
1707 | ||
1708 | ENTER; | |
1709 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1710 | if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { | |
1711 | __ibmvfc_reset_host(vhost); | |
1712 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1713 | return 0; | |
1714 | } | |
1715 | ||
1716 | vhost->aborting_passthru = 1; | |
1717 | evt = ibmvfc_get_event(vhost); | |
1718 | ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); | |
1719 | ||
1720 | tmf = &evt->iu.tmf; | |
1721 | memset(tmf, 0, sizeof(*tmf)); | |
1722 | tmf->common.version = 1; | |
1723 | tmf->common.opcode = IBMVFC_TMF_MAD; | |
1724 | tmf->common.length = sizeof(*tmf); | |
1725 | tmf->scsi_id = port_id; | |
1726 | tmf->cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY; | |
1727 | tmf->my_cancel_key = IBMVFC_INTERNAL_CANCEL_KEY; | |
1728 | rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
1729 | ||
1730 | if (rc != 0) { | |
1731 | vhost->aborting_passthru = 0; | |
1732 | dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); | |
1733 | rc = -EIO; | |
1734 | } else | |
1735 | dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", | |
1736 | port_id); | |
1737 | ||
1738 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1739 | ||
1740 | LEAVE; | |
1741 | return rc; | |
1742 | } | |
1743 | ||
1744 | /** | |
1745 | * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command | |
1746 | * @vhost: struct ibmvfc_host to send command | |
1747 | * @port_id: port ID to send command | |
1748 | * | |
1749 | * Returns: | |
1750 | * 0 on success / other on failure | |
1751 | **/ | |
1752 | static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) | |
1753 | { | |
1754 | struct ibmvfc_port_login *plogi; | |
1755 | struct ibmvfc_target *tgt; | |
1756 | struct ibmvfc_event *evt; | |
1757 | union ibmvfc_iu rsp_iu; | |
1758 | unsigned long flags; | |
1759 | int rc = 0, issue_login = 1; | |
1760 | ||
1761 | ENTER; | |
1762 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1763 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
1764 | if (tgt->scsi_id == port_id) { | |
1765 | issue_login = 0; | |
1766 | break; | |
1767 | } | |
1768 | } | |
1769 | ||
1770 | if (!issue_login) | |
1771 | goto unlock_out; | |
1772 | if (unlikely((rc = ibmvfc_host_chkready(vhost)))) | |
1773 | goto unlock_out; | |
1774 | ||
1775 | evt = ibmvfc_get_event(vhost); | |
1776 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); | |
1777 | plogi = &evt->iu.plogi; | |
1778 | memset(plogi, 0, sizeof(*plogi)); | |
1779 | plogi->common.version = 1; | |
1780 | plogi->common.opcode = IBMVFC_PORT_LOGIN; | |
1781 | plogi->common.length = sizeof(*plogi); | |
1782 | plogi->scsi_id = port_id; | |
1783 | evt->sync_iu = &rsp_iu; | |
1784 | init_completion(&evt->comp); | |
1785 | ||
1786 | rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
1787 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1788 | ||
1789 | if (rc) | |
1790 | return -EIO; | |
1791 | ||
1792 | wait_for_completion(&evt->comp); | |
1793 | ||
1794 | if (rsp_iu.plogi.common.status) | |
1795 | rc = -EIO; | |
1796 | ||
1797 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1798 | ibmvfc_free_event(evt); | |
1799 | unlock_out: | |
1800 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1801 | LEAVE; | |
1802 | return rc; | |
1803 | } | |
1804 | ||
1805 | /** | |
1806 | * ibmvfc_bsg_request - Handle a BSG request | |
1807 | * @job: struct fc_bsg_job to be executed | |
1808 | * | |
1809 | * Returns: | |
1810 | * 0 on success / other on failure | |
1811 | **/ | |
1812 | static int ibmvfc_bsg_request(struct fc_bsg_job *job) | |
1813 | { | |
1814 | struct ibmvfc_host *vhost = shost_priv(job->shost); | |
1815 | struct fc_rport *rport = job->rport; | |
1816 | struct ibmvfc_passthru_mad *mad; | |
1817 | struct ibmvfc_event *evt; | |
1818 | union ibmvfc_iu rsp_iu; | |
1819 | unsigned long flags, port_id = -1; | |
1820 | unsigned int code = job->request->msgcode; | |
1821 | int rc = 0, req_seg, rsp_seg, issue_login = 0; | |
1822 | u32 fc_flags, rsp_len; | |
1823 | ||
1824 | ENTER; | |
1825 | job->reply->reply_payload_rcv_len = 0; | |
1826 | if (rport) | |
1827 | port_id = rport->port_id; | |
1828 | ||
1829 | switch (code) { | |
1830 | case FC_BSG_HST_ELS_NOLOGIN: | |
1831 | port_id = (job->request->rqst_data.h_els.port_id[0] << 16) | | |
1832 | (job->request->rqst_data.h_els.port_id[1] << 8) | | |
1833 | job->request->rqst_data.h_els.port_id[2]; | |
1834 | case FC_BSG_RPT_ELS: | |
1835 | fc_flags = IBMVFC_FC_ELS; | |
1836 | break; | |
1837 | case FC_BSG_HST_CT: | |
1838 | issue_login = 1; | |
1839 | port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) | | |
1840 | (job->request->rqst_data.h_ct.port_id[1] << 8) | | |
1841 | job->request->rqst_data.h_ct.port_id[2]; | |
1842 | case FC_BSG_RPT_CT: | |
1843 | fc_flags = IBMVFC_FC_CT_IU; | |
1844 | break; | |
1845 | default: | |
1846 | return -ENOTSUPP; | |
1847 | }; | |
1848 | ||
1849 | if (port_id == -1) | |
1850 | return -EINVAL; | |
1851 | if (!mutex_trylock(&vhost->passthru_mutex)) | |
1852 | return -EBUSY; | |
1853 | ||
1854 | job->dd_data = (void *)port_id; | |
1855 | req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, | |
1856 | job->request_payload.sg_cnt, DMA_TO_DEVICE); | |
1857 | ||
1858 | if (!req_seg) { | |
1859 | mutex_unlock(&vhost->passthru_mutex); | |
1860 | return -ENOMEM; | |
1861 | } | |
1862 | ||
1863 | rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, | |
1864 | job->reply_payload.sg_cnt, DMA_FROM_DEVICE); | |
1865 | ||
1866 | if (!rsp_seg) { | |
1867 | dma_unmap_sg(vhost->dev, job->request_payload.sg_list, | |
1868 | job->request_payload.sg_cnt, DMA_TO_DEVICE); | |
1869 | mutex_unlock(&vhost->passthru_mutex); | |
1870 | return -ENOMEM; | |
1871 | } | |
1872 | ||
1873 | if (req_seg > 1 || rsp_seg > 1) { | |
1874 | rc = -EINVAL; | |
1875 | goto out; | |
1876 | } | |
1877 | ||
1878 | if (issue_login) | |
1879 | rc = ibmvfc_bsg_plogi(vhost, port_id); | |
1880 | ||
1881 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1882 | ||
1883 | if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || | |
1884 | unlikely((rc = ibmvfc_host_chkready(vhost)))) { | |
1885 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1886 | goto out; | |
1887 | } | |
1888 | ||
1889 | evt = ibmvfc_get_event(vhost); | |
1890 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); | |
1891 | mad = &evt->iu.passthru; | |
1892 | ||
1893 | memset(mad, 0, sizeof(*mad)); | |
1894 | mad->common.version = 1; | |
1895 | mad->common.opcode = IBMVFC_PASSTHRU; | |
1896 | mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); | |
1897 | ||
1898 | mad->cmd_ioba.va = (u64)evt->crq.ioba + | |
1899 | offsetof(struct ibmvfc_passthru_mad, iu); | |
1900 | mad->cmd_ioba.len = sizeof(mad->iu); | |
1901 | ||
1902 | mad->iu.cmd_len = job->request_payload.payload_len; | |
1903 | mad->iu.rsp_len = job->reply_payload.payload_len; | |
1904 | mad->iu.flags = fc_flags; | |
1905 | mad->iu.cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY; | |
1906 | ||
1907 | mad->iu.cmd.va = sg_dma_address(job->request_payload.sg_list); | |
1908 | mad->iu.cmd.len = sg_dma_len(job->request_payload.sg_list); | |
1909 | mad->iu.rsp.va = sg_dma_address(job->reply_payload.sg_list); | |
1910 | mad->iu.rsp.len = sg_dma_len(job->reply_payload.sg_list); | |
1911 | mad->iu.scsi_id = port_id; | |
1912 | mad->iu.tag = (u64)evt; | |
1913 | rsp_len = mad->iu.rsp.len; | |
1914 | ||
1915 | evt->sync_iu = &rsp_iu; | |
1916 | init_completion(&evt->comp); | |
1917 | rc = ibmvfc_send_event(evt, vhost, 0); | |
1918 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1919 | ||
1920 | if (rc) { | |
1921 | rc = -EIO; | |
1922 | goto out; | |
1923 | } | |
1924 | ||
1925 | wait_for_completion(&evt->comp); | |
1926 | ||
1927 | if (rsp_iu.passthru.common.status) | |
1928 | rc = -EIO; | |
1929 | else | |
1930 | job->reply->reply_payload_rcv_len = rsp_len; | |
1931 | ||
1932 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1933 | ibmvfc_free_event(evt); | |
1934 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1935 | job->reply->result = rc; | |
1936 | job->job_done(job); | |
1937 | rc = 0; | |
1938 | out: | |
1939 | dma_unmap_sg(vhost->dev, job->request_payload.sg_list, | |
1940 | job->request_payload.sg_cnt, DMA_TO_DEVICE); | |
1941 | dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, | |
1942 | job->reply_payload.sg_cnt, DMA_FROM_DEVICE); | |
1943 | mutex_unlock(&vhost->passthru_mutex); | |
1944 | LEAVE; | |
1945 | return rc; | |
1946 | } | |
1947 | ||
072b91f9 BK |
1948 | /** |
1949 | * ibmvfc_reset_device - Reset the device with the specified reset type | |
1950 | * @sdev: scsi device to reset | |
1951 | * @type: reset type | |
1952 | * @desc: reset type description for log messages | |
1953 | * | |
1954 | * Returns: | |
1955 | * 0 on success / other on failure | |
1956 | **/ | |
1957 | static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) | |
1958 | { | |
1959 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
1960 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
1961 | struct ibmvfc_cmd *tmf; | |
50ed9a00 | 1962 | struct ibmvfc_event *evt = NULL; |
072b91f9 BK |
1963 | union ibmvfc_iu rsp_iu; |
1964 | struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; | |
1965 | int rsp_rc = -EBUSY; | |
1966 | unsigned long flags; | |
1967 | int rsp_code = 0; | |
1968 | ||
1969 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1970 | if (vhost->state == IBMVFC_ACTIVE) { | |
1971 | evt = ibmvfc_get_event(vhost); | |
1972 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); | |
1973 | ||
1974 | tmf = &evt->iu.cmd; | |
1975 | memset(tmf, 0, sizeof(*tmf)); | |
1976 | tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); | |
1977 | tmf->resp.len = sizeof(tmf->rsp); | |
1978 | tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; | |
1979 | tmf->payload_len = sizeof(tmf->iu); | |
1980 | tmf->resp_len = sizeof(tmf->rsp); | |
1981 | tmf->cancel_key = (unsigned long)sdev->hostdata; | |
1982 | tmf->tgt_scsi_id = rport->port_id; | |
1983 | int_to_scsilun(sdev->lun, &tmf->iu.lun); | |
1984 | tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); | |
1985 | tmf->iu.tmf_flags = type; | |
1986 | evt->sync_iu = &rsp_iu; | |
1987 | ||
1988 | init_completion(&evt->comp); | |
1989 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
1990 | } | |
1991 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1992 | ||
1993 | if (rsp_rc != 0) { | |
1994 | sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", | |
1995 | desc, rsp_rc); | |
1996 | return -EIO; | |
1997 | } | |
1998 | ||
1999 | sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); | |
2000 | wait_for_completion(&evt->comp); | |
2001 | ||
230934a6 BK |
2002 | if (rsp_iu.cmd.status) |
2003 | rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); | |
2004 | ||
2005 | if (rsp_code) { | |
072b91f9 BK |
2006 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) |
2007 | rsp_code = fc_rsp->data.info.rsp_code; | |
2008 | ||
2009 | sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " | |
2010 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", | |
2011 | desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), | |
2012 | rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, | |
2013 | fc_rsp->scsi_status); | |
2014 | rsp_rc = -EIO; | |
2015 | } else | |
2016 | sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); | |
2017 | ||
2018 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2019 | ibmvfc_free_event(evt); | |
2020 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2021 | return rsp_rc; | |
2022 | } | |
2023 | ||
2024 | /** | |
2025 | * ibmvfc_abort_task_set - Abort outstanding commands to the device | |
2026 | * @sdev: scsi device to abort commands | |
2027 | * | |
2028 | * This sends an Abort Task Set to the VIOS for the specified device. This does | |
2029 | * NOT send any cancel to the VIOS. That must be done separately. | |
2030 | * | |
2031 | * Returns: | |
2032 | * 0 on success / other on failure | |
2033 | **/ | |
2034 | static int ibmvfc_abort_task_set(struct scsi_device *sdev) | |
2035 | { | |
2036 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
2037 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
2038 | struct ibmvfc_cmd *tmf; | |
2039 | struct ibmvfc_event *evt, *found_evt; | |
2040 | union ibmvfc_iu rsp_iu; | |
2041 | struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; | |
2042 | int rsp_rc = -EBUSY; | |
2043 | unsigned long flags; | |
2044 | int rsp_code = 0; | |
2045 | ||
2046 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2047 | found_evt = NULL; | |
2048 | list_for_each_entry(evt, &vhost->sent, queue) { | |
2049 | if (evt->cmnd && evt->cmnd->device == sdev) { | |
2050 | found_evt = evt; | |
2051 | break; | |
2052 | } | |
2053 | } | |
2054 | ||
2055 | if (!found_evt) { | |
2056 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
2057 | sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); | |
2058 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2059 | return 0; | |
2060 | } | |
2061 | ||
2062 | if (vhost->state == IBMVFC_ACTIVE) { | |
2063 | evt = ibmvfc_get_event(vhost); | |
2064 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); | |
2065 | ||
2066 | tmf = &evt->iu.cmd; | |
2067 | memset(tmf, 0, sizeof(*tmf)); | |
2068 | tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); | |
2069 | tmf->resp.len = sizeof(tmf->rsp); | |
2070 | tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; | |
2071 | tmf->payload_len = sizeof(tmf->iu); | |
2072 | tmf->resp_len = sizeof(tmf->rsp); | |
2073 | tmf->cancel_key = (unsigned long)sdev->hostdata; | |
2074 | tmf->tgt_scsi_id = rport->port_id; | |
2075 | int_to_scsilun(sdev->lun, &tmf->iu.lun); | |
2076 | tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); | |
2077 | tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; | |
2078 | evt->sync_iu = &rsp_iu; | |
2079 | ||
2080 | init_completion(&evt->comp); | |
2081 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
2082 | } | |
2083 | ||
2084 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2085 | ||
2086 | if (rsp_rc != 0) { | |
2087 | sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); | |
2088 | return -EIO; | |
2089 | } | |
2090 | ||
2091 | sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); | |
2092 | wait_for_completion(&evt->comp); | |
2093 | ||
230934a6 BK |
2094 | if (rsp_iu.cmd.status) |
2095 | rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); | |
2096 | ||
2097 | if (rsp_code) { | |
072b91f9 BK |
2098 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) |
2099 | rsp_code = fc_rsp->data.info.rsp_code; | |
2100 | ||
2101 | sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " | |
2102 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", | |
2103 | ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), | |
2104 | rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, | |
2105 | fc_rsp->scsi_status); | |
2106 | rsp_rc = -EIO; | |
2107 | } else | |
2108 | sdev_printk(KERN_INFO, sdev, "Abort successful\n"); | |
2109 | ||
2110 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2111 | ibmvfc_free_event(evt); | |
2112 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2113 | return rsp_rc; | |
2114 | } | |
2115 | ||
2116 | /** | |
2117 | * ibmvfc_cancel_all - Cancel all outstanding commands to the device | |
2118 | * @sdev: scsi device to cancel commands | |
2119 | * @type: type of error recovery being performed | |
2120 | * | |
2121 | * This sends a cancel to the VIOS for the specified device. This does | |
2122 | * NOT send any abort to the actual device. That must be done separately. | |
2123 | * | |
2124 | * Returns: | |
2125 | * 0 on success / other on failure | |
2126 | **/ | |
2127 | static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) | |
2128 | { | |
2129 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
ad8dcffa BK |
2130 | struct scsi_target *starget = scsi_target(sdev); |
2131 | struct fc_rport *rport = starget_to_rport(starget); | |
072b91f9 BK |
2132 | struct ibmvfc_tmf *tmf; |
2133 | struct ibmvfc_event *evt, *found_evt; | |
2134 | union ibmvfc_iu rsp; | |
2135 | int rsp_rc = -EBUSY; | |
2136 | unsigned long flags; | |
2137 | u16 status; | |
2138 | ||
2139 | ENTER; | |
2140 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2141 | found_evt = NULL; | |
2142 | list_for_each_entry(evt, &vhost->sent, queue) { | |
2143 | if (evt->cmnd && evt->cmnd->device == sdev) { | |
2144 | found_evt = evt; | |
2145 | break; | |
2146 | } | |
2147 | } | |
2148 | ||
2149 | if (!found_evt) { | |
2150 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
2151 | sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); | |
2152 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2153 | return 0; | |
2154 | } | |
2155 | ||
2156 | if (vhost->state == IBMVFC_ACTIVE) { | |
2157 | evt = ibmvfc_get_event(vhost); | |
2158 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); | |
2159 | ||
2160 | tmf = &evt->iu.tmf; | |
2161 | memset(tmf, 0, sizeof(*tmf)); | |
2162 | tmf->common.version = 1; | |
2163 | tmf->common.opcode = IBMVFC_TMF_MAD; | |
2164 | tmf->common.length = sizeof(*tmf); | |
2165 | tmf->scsi_id = rport->port_id; | |
2166 | int_to_scsilun(sdev->lun, &tmf->lun); | |
2167 | tmf->flags = (type | IBMVFC_TMF_LUA_VALID); | |
2168 | tmf->cancel_key = (unsigned long)sdev->hostdata; | |
ad8dcffa | 2169 | tmf->my_cancel_key = (unsigned long)starget->hostdata; |
072b91f9 BK |
2170 | |
2171 | evt->sync_iu = &rsp; | |
2172 | init_completion(&evt->comp); | |
2173 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
2174 | } | |
2175 | ||
2176 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2177 | ||
2178 | if (rsp_rc != 0) { | |
2179 | sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); | |
2180 | return -EIO; | |
2181 | } | |
2182 | ||
2183 | sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); | |
2184 | ||
2185 | wait_for_completion(&evt->comp); | |
2186 | status = rsp.mad_common.status; | |
2187 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2188 | ibmvfc_free_event(evt); | |
2189 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2190 | ||
2191 | if (status != IBMVFC_MAD_SUCCESS) { | |
2192 | sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); | |
2193 | return -EIO; | |
2194 | } | |
2195 | ||
2196 | sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); | |
2197 | return 0; | |
2198 | } | |
2199 | ||
ad8dcffa BK |
2200 | /** |
2201 | * ibmvfc_match_target - Match function for specified target | |
2202 | * @evt: ibmvfc event struct | |
2203 | * @device: device to match (starget) | |
2204 | * | |
2205 | * Returns: | |
2206 | * 1 if event matches starget / 0 if event does not match starget | |
2207 | **/ | |
2208 | static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) | |
2209 | { | |
2210 | if (evt->cmnd && scsi_target(evt->cmnd->device) == device) | |
2211 | return 1; | |
2212 | return 0; | |
2213 | } | |
2214 | ||
2215 | /** | |
2216 | * ibmvfc_match_lun - Match function for specified LUN | |
2217 | * @evt: ibmvfc event struct | |
2218 | * @device: device to match (sdev) | |
2219 | * | |
2220 | * Returns: | |
2221 | * 1 if event matches sdev / 0 if event does not match sdev | |
2222 | **/ | |
2223 | static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) | |
2224 | { | |
2225 | if (evt->cmnd && evt->cmnd->device == device) | |
2226 | return 1; | |
2227 | return 0; | |
2228 | } | |
2229 | ||
2230 | /** | |
2231 | * ibmvfc_wait_for_ops - Wait for ops to complete | |
2232 | * @vhost: ibmvfc host struct | |
2233 | * @device: device to match (starget or sdev) | |
2234 | * @match: match function | |
2235 | * | |
2236 | * Returns: | |
2237 | * SUCCESS / FAILED | |
2238 | **/ | |
2239 | static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, | |
2240 | int (*match) (struct ibmvfc_event *, void *)) | |
2241 | { | |
2242 | struct ibmvfc_event *evt; | |
2243 | DECLARE_COMPLETION_ONSTACK(comp); | |
2244 | int wait; | |
2245 | unsigned long flags; | |
2246 | signed long timeout = init_timeout * HZ; | |
2247 | ||
2248 | ENTER; | |
2249 | do { | |
2250 | wait = 0; | |
2251 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2252 | list_for_each_entry(evt, &vhost->sent, queue) { | |
2253 | if (match(evt, device)) { | |
2254 | evt->eh_comp = ∁ | |
2255 | wait++; | |
2256 | } | |
2257 | } | |
2258 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2259 | ||
2260 | if (wait) { | |
2261 | timeout = wait_for_completion_timeout(&comp, timeout); | |
2262 | ||
2263 | if (!timeout) { | |
2264 | wait = 0; | |
2265 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2266 | list_for_each_entry(evt, &vhost->sent, queue) { | |
2267 | if (match(evt, device)) { | |
2268 | evt->eh_comp = NULL; | |
2269 | wait++; | |
2270 | } | |
2271 | } | |
2272 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2273 | if (wait) | |
2274 | dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); | |
2275 | LEAVE; | |
2276 | return wait ? FAILED : SUCCESS; | |
2277 | } | |
2278 | } | |
2279 | } while (wait); | |
2280 | ||
2281 | LEAVE; | |
2282 | return SUCCESS; | |
2283 | } | |
2284 | ||
072b91f9 BK |
2285 | /** |
2286 | * ibmvfc_eh_abort_handler - Abort a command | |
2287 | * @cmd: scsi command to abort | |
2288 | * | |
2289 | * Returns: | |
2290 | * SUCCESS / FAILED | |
2291 | **/ | |
2292 | static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) | |
2293 | { | |
ad8dcffa BK |
2294 | struct scsi_device *sdev = cmd->device; |
2295 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
072b91f9 | 2296 | int cancel_rc, abort_rc; |
ad8dcffa | 2297 | int rc = FAILED; |
072b91f9 BK |
2298 | |
2299 | ENTER; | |
2300 | ibmvfc_wait_while_resetting(vhost); | |
ad8dcffa BK |
2301 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); |
2302 | abort_rc = ibmvfc_abort_task_set(sdev); | |
072b91f9 | 2303 | |
ad8dcffa BK |
2304 | if (!cancel_rc && !abort_rc) |
2305 | rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); | |
072b91f9 BK |
2306 | |
2307 | LEAVE; | |
ad8dcffa | 2308 | return rc; |
072b91f9 BK |
2309 | } |
2310 | ||
2311 | /** | |
2312 | * ibmvfc_eh_device_reset_handler - Reset a single LUN | |
2313 | * @cmd: scsi command struct | |
2314 | * | |
2315 | * Returns: | |
2316 | * SUCCESS / FAILED | |
2317 | **/ | |
2318 | static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) | |
2319 | { | |
ad8dcffa BK |
2320 | struct scsi_device *sdev = cmd->device; |
2321 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
072b91f9 | 2322 | int cancel_rc, reset_rc; |
ad8dcffa | 2323 | int rc = FAILED; |
072b91f9 BK |
2324 | |
2325 | ENTER; | |
2326 | ibmvfc_wait_while_resetting(vhost); | |
ad8dcffa BK |
2327 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); |
2328 | reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); | |
072b91f9 | 2329 | |
ad8dcffa BK |
2330 | if (!cancel_rc && !reset_rc) |
2331 | rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); | |
072b91f9 BK |
2332 | |
2333 | LEAVE; | |
ad8dcffa | 2334 | return rc; |
072b91f9 BK |
2335 | } |
2336 | ||
2337 | /** | |
4a5c4a5e | 2338 | * ibmvfc_dev_cancel_all_abts - Device iterated cancel all function |
072b91f9 BK |
2339 | * @sdev: scsi device struct |
2340 | * @data: return code | |
2341 | * | |
2342 | **/ | |
4a5c4a5e BK |
2343 | static void ibmvfc_dev_cancel_all_abts(struct scsi_device *sdev, void *data) |
2344 | { | |
2345 | unsigned long *rc = data; | |
2346 | *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); | |
2347 | } | |
2348 | ||
2349 | /** | |
2350 | * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function | |
2351 | * @sdev: scsi device struct | |
2352 | * @data: return code | |
2353 | * | |
2354 | **/ | |
2355 | static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) | |
072b91f9 BK |
2356 | { |
2357 | unsigned long *rc = data; | |
2358 | *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); | |
2359 | } | |
2360 | ||
2361 | /** | |
2362 | * ibmvfc_dev_abort_all - Device iterated abort task set function | |
2363 | * @sdev: scsi device struct | |
2364 | * @data: return code | |
2365 | * | |
2366 | **/ | |
2367 | static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) | |
2368 | { | |
2369 | unsigned long *rc = data; | |
2370 | *rc |= ibmvfc_abort_task_set(sdev); | |
2371 | } | |
2372 | ||
2373 | /** | |
2374 | * ibmvfc_eh_target_reset_handler - Reset the target | |
2375 | * @cmd: scsi command struct | |
2376 | * | |
2377 | * Returns: | |
2378 | * SUCCESS / FAILED | |
2379 | **/ | |
2380 | static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) | |
2381 | { | |
ad8dcffa BK |
2382 | struct scsi_device *sdev = cmd->device; |
2383 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
2384 | struct scsi_target *starget = scsi_target(sdev); | |
072b91f9 | 2385 | int reset_rc; |
ad8dcffa | 2386 | int rc = FAILED; |
072b91f9 | 2387 | unsigned long cancel_rc = 0; |
072b91f9 BK |
2388 | |
2389 | ENTER; | |
2390 | ibmvfc_wait_while_resetting(vhost); | |
4a5c4a5e | 2391 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); |
ad8dcffa | 2392 | reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); |
072b91f9 | 2393 | |
ad8dcffa BK |
2394 | if (!cancel_rc && !reset_rc) |
2395 | rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); | |
072b91f9 BK |
2396 | |
2397 | LEAVE; | |
ad8dcffa | 2398 | return rc; |
072b91f9 BK |
2399 | } |
2400 | ||
2401 | /** | |
2402 | * ibmvfc_eh_host_reset_handler - Reset the connection to the server | |
2403 | * @cmd: struct scsi_cmnd having problems | |
2404 | * | |
2405 | **/ | |
2406 | static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) | |
2407 | { | |
2408 | int rc; | |
2409 | struct ibmvfc_host *vhost = shost_priv(cmd->device->host); | |
2410 | ||
2411 | dev_err(vhost->dev, "Resetting connection due to error recovery\n"); | |
2412 | rc = ibmvfc_issue_fc_host_lip(vhost->host); | |
2413 | return rc ? FAILED : SUCCESS; | |
2414 | } | |
2415 | ||
2416 | /** | |
2417 | * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. | |
2418 | * @rport: rport struct | |
2419 | * | |
2420 | * Return value: | |
2421 | * none | |
2422 | **/ | |
2423 | static void ibmvfc_terminate_rport_io(struct fc_rport *rport) | |
2424 | { | |
2425 | struct scsi_target *starget = to_scsi_target(&rport->dev); | |
2426 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2427 | struct ibmvfc_host *vhost = shost_priv(shost); | |
072b91f9 BK |
2428 | unsigned long cancel_rc = 0; |
2429 | unsigned long abort_rc = 0; | |
ad8dcffa | 2430 | int rc = FAILED; |
072b91f9 BK |
2431 | |
2432 | ENTER; | |
4a5c4a5e | 2433 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_abts); |
072b91f9 BK |
2434 | starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); |
2435 | ||
ad8dcffa BK |
2436 | if (!cancel_rc && !abort_rc) |
2437 | rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); | |
2438 | ||
2439 | if (rc == FAILED) | |
072b91f9 | 2440 | ibmvfc_issue_fc_host_lip(shost); |
072b91f9 BK |
2441 | LEAVE; |
2442 | } | |
2443 | ||
2444 | static const struct { | |
2445 | enum ibmvfc_async_event ae; | |
2446 | const char *desc; | |
2447 | } ae_desc [] = { | |
2448 | { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, | |
2449 | { IBMVFC_AE_ELS_LOGO, "LOGO" }, | |
2450 | { IBMVFC_AE_ELS_PRLO, "PRLO" }, | |
2451 | { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, | |
2452 | { IBMVFC_AE_SCN_GROUP, "Group SCN" }, | |
2453 | { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, | |
2454 | { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, | |
2455 | { IBMVFC_AE_LINK_UP, "Link Up" }, | |
2456 | { IBMVFC_AE_LINK_DOWN, "Link Down" }, | |
2457 | { IBMVFC_AE_LINK_DEAD, "Link Dead" }, | |
2458 | { IBMVFC_AE_HALT, "Halt" }, | |
2459 | { IBMVFC_AE_RESUME, "Resume" }, | |
2460 | { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, | |
2461 | }; | |
2462 | ||
2463 | static const char *unknown_ae = "Unknown async"; | |
2464 | ||
2465 | /** | |
2466 | * ibmvfc_get_ae_desc - Get text description for async event | |
2467 | * @ae: async event | |
2468 | * | |
2469 | **/ | |
2470 | static const char *ibmvfc_get_ae_desc(u64 ae) | |
2471 | { | |
2472 | int i; | |
2473 | ||
2474 | for (i = 0; i < ARRAY_SIZE(ae_desc); i++) | |
2475 | if (ae_desc[i].ae == ae) | |
2476 | return ae_desc[i].desc; | |
2477 | ||
2478 | return unknown_ae; | |
2479 | } | |
2480 | ||
2481 | /** | |
2482 | * ibmvfc_handle_async - Handle an async event from the adapter | |
2483 | * @crq: crq to process | |
2484 | * @vhost: ibmvfc host struct | |
2485 | * | |
2486 | **/ | |
2487 | static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, | |
2488 | struct ibmvfc_host *vhost) | |
2489 | { | |
2490 | const char *desc = ibmvfc_get_ae_desc(crq->event); | |
6d29cc56 | 2491 | struct ibmvfc_target *tgt; |
072b91f9 | 2492 | |
775a42ec SR |
2493 | ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx," |
2494 | " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name); | |
072b91f9 BK |
2495 | |
2496 | switch (crq->event) { | |
072b91f9 | 2497 | case IBMVFC_AE_RESUME: |
497f9c50 BK |
2498 | switch (crq->link_state) { |
2499 | case IBMVFC_AE_LS_LINK_DOWN: | |
2500 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
2501 | break; | |
2502 | case IBMVFC_AE_LS_LINK_DEAD: | |
2503 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
2504 | break; | |
2505 | case IBMVFC_AE_LS_LINK_UP: | |
2506 | case IBMVFC_AE_LS_LINK_BOUNCED: | |
2507 | default: | |
2508 | vhost->events_to_log |= IBMVFC_AE_LINKUP; | |
2509 | vhost->delay_init = 1; | |
2510 | __ibmvfc_reset_host(vhost); | |
2511 | break; | |
2512 | }; | |
2513 | ||
2514 | break; | |
2515 | case IBMVFC_AE_LINK_UP: | |
072b91f9 | 2516 | vhost->events_to_log |= IBMVFC_AE_LINKUP; |
d2131b33 BK |
2517 | vhost->delay_init = 1; |
2518 | __ibmvfc_reset_host(vhost); | |
072b91f9 BK |
2519 | break; |
2520 | case IBMVFC_AE_SCN_FABRIC: | |
d2131b33 | 2521 | case IBMVFC_AE_SCN_DOMAIN: |
072b91f9 | 2522 | vhost->events_to_log |= IBMVFC_AE_RSCN; |
d2131b33 BK |
2523 | vhost->delay_init = 1; |
2524 | __ibmvfc_reset_host(vhost); | |
072b91f9 BK |
2525 | break; |
2526 | case IBMVFC_AE_SCN_NPORT: | |
2527 | case IBMVFC_AE_SCN_GROUP: | |
072b91f9 | 2528 | vhost->events_to_log |= IBMVFC_AE_RSCN; |
6d29cc56 BK |
2529 | ibmvfc_reinit_host(vhost); |
2530 | break; | |
072b91f9 BK |
2531 | case IBMVFC_AE_ELS_LOGO: |
2532 | case IBMVFC_AE_ELS_PRLO: | |
2533 | case IBMVFC_AE_ELS_PLOGI: | |
6d29cc56 BK |
2534 | list_for_each_entry(tgt, &vhost->targets, queue) { |
2535 | if (!crq->scsi_id && !crq->wwpn && !crq->node_name) | |
2536 | break; | |
2537 | if (crq->scsi_id && tgt->scsi_id != crq->scsi_id) | |
2538 | continue; | |
2539 | if (crq->wwpn && tgt->ids.port_name != crq->wwpn) | |
2540 | continue; | |
2541 | if (crq->node_name && tgt->ids.node_name != crq->node_name) | |
2542 | continue; | |
017b2ae3 BK |
2543 | if (tgt->need_login && crq->event == IBMVFC_AE_ELS_LOGO) |
2544 | tgt->logo_rcvd = 1; | |
2545 | if (!tgt->need_login || crq->event == IBMVFC_AE_ELS_PLOGI) { | |
2546 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
2547 | ibmvfc_reinit_host(vhost); | |
2548 | } | |
6d29cc56 | 2549 | } |
072b91f9 BK |
2550 | break; |
2551 | case IBMVFC_AE_LINK_DOWN: | |
2552 | case IBMVFC_AE_ADAPTER_FAILED: | |
2553 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
2554 | break; | |
2555 | case IBMVFC_AE_LINK_DEAD: | |
2556 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
2557 | break; | |
2558 | case IBMVFC_AE_HALT: | |
2559 | ibmvfc_link_down(vhost, IBMVFC_HALTED); | |
2560 | break; | |
2561 | default: | |
775a42ec | 2562 | dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); |
072b91f9 BK |
2563 | break; |
2564 | }; | |
2565 | } | |
2566 | ||
2567 | /** | |
2568 | * ibmvfc_handle_crq - Handles and frees received events in the CRQ | |
2569 | * @crq: Command/Response queue | |
2570 | * @vhost: ibmvfc host struct | |
2571 | * | |
2572 | **/ | |
2573 | static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) | |
2574 | { | |
2575 | long rc; | |
2576 | struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; | |
2577 | ||
2578 | switch (crq->valid) { | |
2579 | case IBMVFC_CRQ_INIT_RSP: | |
2580 | switch (crq->format) { | |
2581 | case IBMVFC_CRQ_INIT: | |
2582 | dev_info(vhost->dev, "Partner initialized\n"); | |
2583 | /* Send back a response */ | |
2584 | rc = ibmvfc_send_crq_init_complete(vhost); | |
2585 | if (rc == 0) | |
861890c6 | 2586 | ibmvfc_init_host(vhost); |
072b91f9 BK |
2587 | else |
2588 | dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); | |
2589 | break; | |
2590 | case IBMVFC_CRQ_INIT_COMPLETE: | |
2591 | dev_info(vhost->dev, "Partner initialization complete\n"); | |
861890c6 | 2592 | ibmvfc_init_host(vhost); |
072b91f9 BK |
2593 | break; |
2594 | default: | |
2595 | dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); | |
2596 | } | |
2597 | return; | |
2598 | case IBMVFC_CRQ_XPORT_EVENT: | |
2599 | vhost->state = IBMVFC_NO_CRQ; | |
79111d08 | 2600 | vhost->logged_in = 0; |
072b91f9 BK |
2601 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
2602 | if (crq->format == IBMVFC_PARTITION_MIGRATED) { | |
2603 | /* We need to re-setup the interpartition connection */ | |
2604 | dev_info(vhost->dev, "Re-enabling adapter\n"); | |
2605 | vhost->client_migrated = 1; | |
2606 | ibmvfc_purge_requests(vhost, DID_REQUEUE); | |
2607 | if ((rc = ibmvfc_reenable_crq_queue(vhost)) || | |
2608 | (rc = ibmvfc_send_crq_init(vhost))) { | |
2609 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
2610 | dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); | |
2611 | } else | |
2612 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
2613 | } else { | |
2614 | dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); | |
2615 | ||
2616 | ibmvfc_purge_requests(vhost, DID_ERROR); | |
2617 | if ((rc = ibmvfc_reset_crq(vhost)) || | |
2618 | (rc = ibmvfc_send_crq_init(vhost))) { | |
2619 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
2620 | dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); | |
2621 | } else | |
2622 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
2623 | } | |
2624 | return; | |
2625 | case IBMVFC_CRQ_CMD_RSP: | |
2626 | break; | |
2627 | default: | |
2628 | dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); | |
2629 | return; | |
2630 | } | |
2631 | ||
2632 | if (crq->format == IBMVFC_ASYNC_EVENT) | |
2633 | return; | |
2634 | ||
2635 | /* The only kind of payload CRQs we should get are responses to | |
2636 | * things we send. Make sure this response is to something we | |
2637 | * actually sent | |
2638 | */ | |
2639 | if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { | |
775a42ec | 2640 | dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", |
072b91f9 BK |
2641 | crq->ioba); |
2642 | return; | |
2643 | } | |
2644 | ||
2645 | if (unlikely(atomic_read(&evt->free))) { | |
775a42ec | 2646 | dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", |
072b91f9 BK |
2647 | crq->ioba); |
2648 | return; | |
2649 | } | |
2650 | ||
2651 | del_timer(&evt->timer); | |
2652 | list_del(&evt->queue); | |
2653 | ibmvfc_trc_end(evt); | |
2654 | evt->done(evt); | |
2655 | } | |
2656 | ||
2657 | /** | |
2658 | * ibmvfc_scan_finished - Check if the device scan is done. | |
2659 | * @shost: scsi host struct | |
2660 | * @time: current elapsed time | |
2661 | * | |
2662 | * Returns: | |
2663 | * 0 if scan is not done / 1 if scan is done | |
2664 | **/ | |
2665 | static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) | |
2666 | { | |
2667 | unsigned long flags; | |
2668 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2669 | int done = 0; | |
2670 | ||
2671 | spin_lock_irqsave(shost->host_lock, flags); | |
2672 | if (time >= (init_timeout * HZ)) { | |
2673 | dev_info(vhost->dev, "Scan taking longer than %d seconds, " | |
2674 | "continuing initialization\n", init_timeout); | |
2675 | done = 1; | |
2676 | } | |
2677 | ||
43c8da90 | 2678 | if (vhost->scan_complete) |
072b91f9 BK |
2679 | done = 1; |
2680 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2681 | return done; | |
2682 | } | |
2683 | ||
2684 | /** | |
2685 | * ibmvfc_slave_alloc - Setup the device's task set value | |
2686 | * @sdev: struct scsi_device device to configure | |
2687 | * | |
2688 | * Set the device's task set value so that error handling works as | |
2689 | * expected. | |
2690 | * | |
2691 | * Returns: | |
2692 | * 0 on success / -ENXIO if device does not exist | |
2693 | **/ | |
2694 | static int ibmvfc_slave_alloc(struct scsi_device *sdev) | |
2695 | { | |
2696 | struct Scsi_Host *shost = sdev->host; | |
2697 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
2698 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2699 | unsigned long flags = 0; | |
2700 | ||
2701 | if (!rport || fc_remote_port_chkready(rport)) | |
2702 | return -ENXIO; | |
2703 | ||
2704 | spin_lock_irqsave(shost->host_lock, flags); | |
2705 | sdev->hostdata = (void *)(unsigned long)vhost->task_set++; | |
2706 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2707 | return 0; | |
2708 | } | |
2709 | ||
ad8dcffa BK |
2710 | /** |
2711 | * ibmvfc_target_alloc - Setup the target's task set value | |
2712 | * @starget: struct scsi_target | |
2713 | * | |
2714 | * Set the target's task set value so that error handling works as | |
2715 | * expected. | |
2716 | * | |
2717 | * Returns: | |
2718 | * 0 on success / -ENXIO if device does not exist | |
2719 | **/ | |
2720 | static int ibmvfc_target_alloc(struct scsi_target *starget) | |
2721 | { | |
2722 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2723 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2724 | unsigned long flags = 0; | |
2725 | ||
2726 | spin_lock_irqsave(shost->host_lock, flags); | |
2727 | starget->hostdata = (void *)(unsigned long)vhost->task_set++; | |
2728 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2729 | return 0; | |
2730 | } | |
2731 | ||
072b91f9 BK |
2732 | /** |
2733 | * ibmvfc_slave_configure - Configure the device | |
2734 | * @sdev: struct scsi_device device to configure | |
2735 | * | |
2736 | * Enable allow_restart for a device if it is a disk. Adjust the | |
2737 | * queue_depth here also. | |
2738 | * | |
2739 | * Returns: | |
2740 | * 0 | |
2741 | **/ | |
2742 | static int ibmvfc_slave_configure(struct scsi_device *sdev) | |
2743 | { | |
2744 | struct Scsi_Host *shost = sdev->host; | |
2745 | struct fc_rport *rport = starget_to_rport(sdev->sdev_target); | |
2746 | unsigned long flags = 0; | |
2747 | ||
2748 | spin_lock_irqsave(shost->host_lock, flags); | |
2749 | if (sdev->type == TYPE_DISK) | |
2750 | sdev->allow_restart = 1; | |
2751 | ||
2752 | if (sdev->tagged_supported) { | |
2753 | scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); | |
2754 | scsi_activate_tcq(sdev, sdev->queue_depth); | |
2755 | } else | |
2756 | scsi_deactivate_tcq(sdev, sdev->queue_depth); | |
2757 | ||
2758 | rport->dev_loss_tmo = dev_loss_tmo; | |
2759 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2760 | return 0; | |
2761 | } | |
2762 | ||
2763 | /** | |
2764 | * ibmvfc_change_queue_depth - Change the device's queue depth | |
2765 | * @sdev: scsi device struct | |
2766 | * @qdepth: depth to set | |
e881a172 | 2767 | * @reason: calling context |
072b91f9 BK |
2768 | * |
2769 | * Return value: | |
2770 | * actual depth set | |
2771 | **/ | |
e881a172 MC |
2772 | static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth, |
2773 | int reason) | |
072b91f9 | 2774 | { |
e881a172 MC |
2775 | if (reason != SCSI_QDEPTH_DEFAULT) |
2776 | return -EOPNOTSUPP; | |
2777 | ||
072b91f9 BK |
2778 | if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) |
2779 | qdepth = IBMVFC_MAX_CMDS_PER_LUN; | |
2780 | ||
2781 | scsi_adjust_queue_depth(sdev, 0, qdepth); | |
2782 | return sdev->queue_depth; | |
2783 | } | |
2784 | ||
2785 | /** | |
2786 | * ibmvfc_change_queue_type - Change the device's queue type | |
2787 | * @sdev: scsi device struct | |
2788 | * @tag_type: type of tags to use | |
2789 | * | |
2790 | * Return value: | |
2791 | * actual queue type set | |
2792 | **/ | |
2793 | static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) | |
2794 | { | |
2795 | if (sdev->tagged_supported) { | |
2796 | scsi_set_tag_type(sdev, tag_type); | |
2797 | ||
2798 | if (tag_type) | |
2799 | scsi_activate_tcq(sdev, sdev->queue_depth); | |
2800 | else | |
2801 | scsi_deactivate_tcq(sdev, sdev->queue_depth); | |
2802 | } else | |
2803 | tag_type = 0; | |
2804 | ||
2805 | return tag_type; | |
2806 | } | |
2807 | ||
2808 | static ssize_t ibmvfc_show_host_partition_name(struct device *dev, | |
2809 | struct device_attribute *attr, char *buf) | |
2810 | { | |
2811 | struct Scsi_Host *shost = class_to_shost(dev); | |
2812 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2813 | ||
2814 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2815 | vhost->login_buf->resp.partition_name); | |
2816 | } | |
2817 | ||
072b91f9 BK |
2818 | static ssize_t ibmvfc_show_host_device_name(struct device *dev, |
2819 | struct device_attribute *attr, char *buf) | |
2820 | { | |
2821 | struct Scsi_Host *shost = class_to_shost(dev); | |
2822 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2823 | ||
2824 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2825 | vhost->login_buf->resp.device_name); | |
2826 | } | |
2827 | ||
072b91f9 BK |
2828 | static ssize_t ibmvfc_show_host_loc_code(struct device *dev, |
2829 | struct device_attribute *attr, char *buf) | |
2830 | { | |
2831 | struct Scsi_Host *shost = class_to_shost(dev); | |
2832 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2833 | ||
2834 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2835 | vhost->login_buf->resp.port_loc_code); | |
2836 | } | |
2837 | ||
072b91f9 BK |
2838 | static ssize_t ibmvfc_show_host_drc_name(struct device *dev, |
2839 | struct device_attribute *attr, char *buf) | |
2840 | { | |
2841 | struct Scsi_Host *shost = class_to_shost(dev); | |
2842 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2843 | ||
2844 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2845 | vhost->login_buf->resp.drc_name); | |
2846 | } | |
2847 | ||
072b91f9 BK |
2848 | static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, |
2849 | struct device_attribute *attr, char *buf) | |
2850 | { | |
2851 | struct Scsi_Host *shost = class_to_shost(dev); | |
2852 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2853 | return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); | |
2854 | } | |
2855 | ||
497f9c50 BK |
2856 | static ssize_t ibmvfc_show_host_capabilities(struct device *dev, |
2857 | struct device_attribute *attr, char *buf) | |
2858 | { | |
2859 | struct Scsi_Host *shost = class_to_shost(dev); | |
2860 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2861 | return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); | |
2862 | } | |
2863 | ||
072b91f9 BK |
2864 | /** |
2865 | * ibmvfc_show_log_level - Show the adapter's error logging level | |
2866 | * @dev: class device struct | |
2867 | * @buf: buffer | |
2868 | * | |
2869 | * Return value: | |
2870 | * number of bytes printed to buffer | |
2871 | **/ | |
2872 | static ssize_t ibmvfc_show_log_level(struct device *dev, | |
2873 | struct device_attribute *attr, char *buf) | |
2874 | { | |
2875 | struct Scsi_Host *shost = class_to_shost(dev); | |
2876 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2877 | unsigned long flags = 0; | |
2878 | int len; | |
2879 | ||
2880 | spin_lock_irqsave(shost->host_lock, flags); | |
2881 | len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); | |
2882 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2883 | return len; | |
2884 | } | |
2885 | ||
2886 | /** | |
2887 | * ibmvfc_store_log_level - Change the adapter's error logging level | |
2888 | * @dev: class device struct | |
2889 | * @buf: buffer | |
2890 | * | |
2891 | * Return value: | |
2892 | * number of bytes printed to buffer | |
2893 | **/ | |
2894 | static ssize_t ibmvfc_store_log_level(struct device *dev, | |
2895 | struct device_attribute *attr, | |
2896 | const char *buf, size_t count) | |
2897 | { | |
2898 | struct Scsi_Host *shost = class_to_shost(dev); | |
2899 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2900 | unsigned long flags = 0; | |
2901 | ||
2902 | spin_lock_irqsave(shost->host_lock, flags); | |
2903 | vhost->log_level = simple_strtoul(buf, NULL, 10); | |
2904 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2905 | return strlen(buf); | |
2906 | } | |
2907 | ||
85e2399e BK |
2908 | static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); |
2909 | static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); | |
2910 | static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); | |
2911 | static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); | |
2912 | static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); | |
497f9c50 | 2913 | static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); |
85e2399e BK |
2914 | static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, |
2915 | ibmvfc_show_log_level, ibmvfc_store_log_level); | |
072b91f9 BK |
2916 | |
2917 | #ifdef CONFIG_SCSI_IBMVFC_TRACE | |
2918 | /** | |
2919 | * ibmvfc_read_trace - Dump the adapter trace | |
2920 | * @kobj: kobject struct | |
2921 | * @bin_attr: bin_attribute struct | |
2922 | * @buf: buffer | |
2923 | * @off: offset | |
2924 | * @count: buffer size | |
2925 | * | |
2926 | * Return value: | |
2927 | * number of bytes printed to buffer | |
2928 | **/ | |
2929 | static ssize_t ibmvfc_read_trace(struct kobject *kobj, | |
2930 | struct bin_attribute *bin_attr, | |
2931 | char *buf, loff_t off, size_t count) | |
2932 | { | |
2933 | struct device *dev = container_of(kobj, struct device, kobj); | |
2934 | struct Scsi_Host *shost = class_to_shost(dev); | |
2935 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2936 | unsigned long flags = 0; | |
2937 | int size = IBMVFC_TRACE_SIZE; | |
2938 | char *src = (char *)vhost->trace; | |
2939 | ||
2940 | if (off > size) | |
2941 | return 0; | |
2942 | if (off + count > size) { | |
2943 | size -= off; | |
2944 | count = size; | |
2945 | } | |
2946 | ||
2947 | spin_lock_irqsave(shost->host_lock, flags); | |
2948 | memcpy(buf, &src[off], count); | |
2949 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2950 | return count; | |
2951 | } | |
2952 | ||
2953 | static struct bin_attribute ibmvfc_trace_attr = { | |
2954 | .attr = { | |
2955 | .name = "trace", | |
2956 | .mode = S_IRUGO, | |
2957 | }, | |
2958 | .size = 0, | |
2959 | .read = ibmvfc_read_trace, | |
2960 | }; | |
2961 | #endif | |
2962 | ||
2963 | static struct device_attribute *ibmvfc_attrs[] = { | |
85e2399e BK |
2964 | &dev_attr_partition_name, |
2965 | &dev_attr_device_name, | |
2966 | &dev_attr_port_loc_code, | |
2967 | &dev_attr_drc_name, | |
2968 | &dev_attr_npiv_version, | |
497f9c50 | 2969 | &dev_attr_capabilities, |
85e2399e | 2970 | &dev_attr_log_level, |
072b91f9 BK |
2971 | NULL |
2972 | }; | |
2973 | ||
2974 | static struct scsi_host_template driver_template = { | |
2975 | .module = THIS_MODULE, | |
2976 | .name = "IBM POWER Virtual FC Adapter", | |
2977 | .proc_name = IBMVFC_NAME, | |
2978 | .queuecommand = ibmvfc_queuecommand, | |
2979 | .eh_abort_handler = ibmvfc_eh_abort_handler, | |
2980 | .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, | |
2981 | .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, | |
2982 | .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, | |
2983 | .slave_alloc = ibmvfc_slave_alloc, | |
2984 | .slave_configure = ibmvfc_slave_configure, | |
ad8dcffa | 2985 | .target_alloc = ibmvfc_target_alloc, |
072b91f9 BK |
2986 | .scan_finished = ibmvfc_scan_finished, |
2987 | .change_queue_depth = ibmvfc_change_queue_depth, | |
2988 | .change_queue_type = ibmvfc_change_queue_type, | |
2989 | .cmd_per_lun = 16, | |
2990 | .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, | |
2991 | .this_id = -1, | |
2992 | .sg_tablesize = SG_ALL, | |
2993 | .max_sectors = IBMVFC_MAX_SECTORS, | |
2994 | .use_clustering = ENABLE_CLUSTERING, | |
2995 | .shost_attrs = ibmvfc_attrs, | |
2996 | }; | |
2997 | ||
2998 | /** | |
2999 | * ibmvfc_next_async_crq - Returns the next entry in async queue | |
3000 | * @vhost: ibmvfc host struct | |
3001 | * | |
3002 | * Returns: | |
3003 | * Pointer to next entry in queue / NULL if empty | |
3004 | **/ | |
3005 | static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) | |
3006 | { | |
3007 | struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; | |
3008 | struct ibmvfc_async_crq *crq; | |
3009 | ||
3010 | crq = &async_crq->msgs[async_crq->cur]; | |
3011 | if (crq->valid & 0x80) { | |
3012 | if (++async_crq->cur == async_crq->size) | |
3013 | async_crq->cur = 0; | |
3014 | } else | |
3015 | crq = NULL; | |
3016 | ||
3017 | return crq; | |
3018 | } | |
3019 | ||
3020 | /** | |
3021 | * ibmvfc_next_crq - Returns the next entry in message queue | |
3022 | * @vhost: ibmvfc host struct | |
3023 | * | |
3024 | * Returns: | |
3025 | * Pointer to next entry in queue / NULL if empty | |
3026 | **/ | |
3027 | static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) | |
3028 | { | |
3029 | struct ibmvfc_crq_queue *queue = &vhost->crq; | |
3030 | struct ibmvfc_crq *crq; | |
3031 | ||
3032 | crq = &queue->msgs[queue->cur]; | |
3033 | if (crq->valid & 0x80) { | |
3034 | if (++queue->cur == queue->size) | |
3035 | queue->cur = 0; | |
3036 | } else | |
3037 | crq = NULL; | |
3038 | ||
3039 | return crq; | |
3040 | } | |
3041 | ||
3042 | /** | |
3043 | * ibmvfc_interrupt - Interrupt handler | |
3044 | * @irq: number of irq to handle, not used | |
3045 | * @dev_instance: ibmvfc_host that received interrupt | |
3046 | * | |
3047 | * Returns: | |
3048 | * IRQ_HANDLED | |
3049 | **/ | |
3050 | static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) | |
3051 | { | |
3052 | struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; | |
039a0898 BK |
3053 | unsigned long flags; |
3054 | ||
3055 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3056 | vio_disable_interrupts(to_vio_dev(vhost->dev)); | |
3057 | tasklet_schedule(&vhost->tasklet); | |
3058 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3059 | return IRQ_HANDLED; | |
3060 | } | |
3061 | ||
3062 | /** | |
3063 | * ibmvfc_tasklet - Interrupt handler tasklet | |
3064 | * @data: ibmvfc host struct | |
3065 | * | |
3066 | * Returns: | |
3067 | * Nothing | |
3068 | **/ | |
3069 | static void ibmvfc_tasklet(void *data) | |
3070 | { | |
3071 | struct ibmvfc_host *vhost = data; | |
072b91f9 BK |
3072 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
3073 | struct ibmvfc_crq *crq; | |
3074 | struct ibmvfc_async_crq *async; | |
3075 | unsigned long flags; | |
3076 | int done = 0; | |
3077 | ||
3078 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
072b91f9 | 3079 | while (!done) { |
072b91f9 BK |
3080 | /* Pull all the valid messages off the async CRQ */ |
3081 | while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { | |
3082 | ibmvfc_handle_async(async, vhost); | |
3083 | async->valid = 0; | |
3084 | } | |
3085 | ||
f1d7fb7a BK |
3086 | /* Pull all the valid messages off the CRQ */ |
3087 | while ((crq = ibmvfc_next_crq(vhost)) != NULL) { | |
072b91f9 BK |
3088 | ibmvfc_handle_crq(crq, vhost); |
3089 | crq->valid = 0; | |
f1d7fb7a BK |
3090 | } |
3091 | ||
3092 | vio_enable_interrupts(vdev); | |
3093 | if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { | |
072b91f9 BK |
3094 | vio_disable_interrupts(vdev); |
3095 | ibmvfc_handle_async(async, vhost); | |
4081b77c | 3096 | async->valid = 0; |
f1d7fb7a BK |
3097 | } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { |
3098 | vio_disable_interrupts(vdev); | |
3099 | ibmvfc_handle_crq(crq, vhost); | |
3100 | crq->valid = 0; | |
072b91f9 BK |
3101 | } else |
3102 | done = 1; | |
3103 | } | |
3104 | ||
3105 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
072b91f9 BK |
3106 | } |
3107 | ||
3108 | /** | |
3109 | * ibmvfc_init_tgt - Set the next init job step for the target | |
3110 | * @tgt: ibmvfc target struct | |
3111 | * @job_step: job step to perform | |
3112 | * | |
3113 | **/ | |
3114 | static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, | |
3115 | void (*job_step) (struct ibmvfc_target *)) | |
3116 | { | |
3117 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); | |
3118 | tgt->job_step = job_step; | |
3119 | wake_up(&tgt->vhost->work_wait_q); | |
3120 | } | |
3121 | ||
3122 | /** | |
3123 | * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization | |
3124 | * @tgt: ibmvfc target struct | |
3125 | * @job_step: initialization job step | |
3126 | * | |
7d0e4622 BK |
3127 | * Returns: 1 if step will be retried / 0 if not |
3128 | * | |
072b91f9 | 3129 | **/ |
7d0e4622 | 3130 | static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, |
072b91f9 BK |
3131 | void (*job_step) (struct ibmvfc_target *)) |
3132 | { | |
1c41fa82 | 3133 | if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { |
072b91f9 BK |
3134 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
3135 | wake_up(&tgt->vhost->work_wait_q); | |
7d0e4622 | 3136 | return 0; |
072b91f9 BK |
3137 | } else |
3138 | ibmvfc_init_tgt(tgt, job_step); | |
7d0e4622 | 3139 | return 1; |
072b91f9 BK |
3140 | } |
3141 | ||
a3b7aeab BK |
3142 | /* Defined in FC-LS */ |
3143 | static const struct { | |
3144 | int code; | |
3145 | int retry; | |
3146 | int logged_in; | |
3147 | } prli_rsp [] = { | |
3148 | { 0, 1, 0 }, | |
3149 | { 1, 0, 1 }, | |
3150 | { 2, 1, 0 }, | |
3151 | { 3, 1, 0 }, | |
3152 | { 4, 0, 0 }, | |
3153 | { 5, 0, 0 }, | |
3154 | { 6, 0, 1 }, | |
3155 | { 7, 0, 0 }, | |
3156 | { 8, 1, 0 }, | |
3157 | }; | |
3158 | ||
3159 | /** | |
3160 | * ibmvfc_get_prli_rsp - Find PRLI response index | |
3161 | * @flags: PRLI response flags | |
3162 | * | |
3163 | **/ | |
3164 | static int ibmvfc_get_prli_rsp(u16 flags) | |
3165 | { | |
3166 | int i; | |
3167 | int code = (flags & 0x0f00) >> 8; | |
3168 | ||
3169 | for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) | |
3170 | if (prli_rsp[i].code == code) | |
3171 | return i; | |
3172 | ||
3173 | return 0; | |
3174 | } | |
3175 | ||
072b91f9 BK |
3176 | /** |
3177 | * ibmvfc_tgt_prli_done - Completion handler for Process Login | |
3178 | * @evt: ibmvfc event struct | |
3179 | * | |
3180 | **/ | |
3181 | static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) | |
3182 | { | |
3183 | struct ibmvfc_target *tgt = evt->tgt; | |
3184 | struct ibmvfc_host *vhost = evt->vhost; | |
3185 | struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; | |
a3b7aeab | 3186 | struct ibmvfc_prli_svc_parms *parms = &rsp->parms; |
072b91f9 | 3187 | u32 status = rsp->common.status; |
7d0e4622 | 3188 | int index, level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
3189 | |
3190 | vhost->discovery_threads--; | |
3191 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3192 | switch (status) { | |
3193 | case IBMVFC_MAD_SUCCESS: | |
a3b7aeab BK |
3194 | tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", |
3195 | parms->type, parms->flags, parms->service_parms); | |
3196 | ||
3197 | if (parms->type == IBMVFC_SCSI_FCP_TYPE) { | |
3198 | index = ibmvfc_get_prli_rsp(parms->flags); | |
3199 | if (prli_rsp[index].logged_in) { | |
3200 | if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) { | |
3201 | tgt->need_login = 0; | |
3202 | tgt->ids.roles = 0; | |
3203 | if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC) | |
3204 | tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; | |
3205 | if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC) | |
3206 | tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; | |
43c8da90 | 3207 | tgt->add_rport = 1; |
a3b7aeab BK |
3208 | } else |
3209 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
3210 | } else if (prli_rsp[index].retry) | |
3211 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); | |
3212 | else | |
3213 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
3214 | } else | |
3215 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
072b91f9 BK |
3216 | break; |
3217 | case IBMVFC_MAD_DRIVER_FAILED: | |
3218 | break; | |
3219 | case IBMVFC_MAD_CRQ_ERROR: | |
3220 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); | |
3221 | break; | |
3222 | case IBMVFC_MAD_FAILED: | |
3223 | default: | |
017b2ae3 BK |
3224 | if ((rsp->status & IBMVFC_VIOS_FAILURE) && rsp->error == IBMVFC_PLOGI_REQUIRED) |
3225 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); | |
3226 | else if (tgt->logo_rcvd) | |
3227 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); | |
3228 | else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) | |
7d0e4622 | 3229 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); |
10e79499 BK |
3230 | else |
3231 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
7d0e4622 BK |
3232 | |
3233 | tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", | |
3234 | ibmvfc_get_cmd_error(rsp->status, rsp->error), | |
3235 | rsp->status, rsp->error, status); | |
072b91f9 BK |
3236 | break; |
3237 | }; | |
3238 | ||
3239 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3240 | ibmvfc_free_event(evt); | |
3241 | wake_up(&vhost->work_wait_q); | |
3242 | } | |
3243 | ||
3244 | /** | |
3245 | * ibmvfc_tgt_send_prli - Send a process login | |
3246 | * @tgt: ibmvfc target struct | |
3247 | * | |
3248 | **/ | |
3249 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) | |
3250 | { | |
3251 | struct ibmvfc_process_login *prli; | |
3252 | struct ibmvfc_host *vhost = tgt->vhost; | |
3253 | struct ibmvfc_event *evt; | |
3254 | ||
3255 | if (vhost->discovery_threads >= disc_threads) | |
3256 | return; | |
3257 | ||
3258 | kref_get(&tgt->kref); | |
3259 | evt = ibmvfc_get_event(vhost); | |
3260 | vhost->discovery_threads++; | |
3261 | ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); | |
3262 | evt->tgt = tgt; | |
3263 | prli = &evt->iu.prli; | |
3264 | memset(prli, 0, sizeof(*prli)); | |
3265 | prli->common.version = 1; | |
3266 | prli->common.opcode = IBMVFC_PROCESS_LOGIN; | |
3267 | prli->common.length = sizeof(*prli); | |
3268 | prli->scsi_id = tgt->scsi_id; | |
3269 | ||
3270 | prli->parms.type = IBMVFC_SCSI_FCP_TYPE; | |
3271 | prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; | |
3272 | prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; | |
3273 | ||
3274 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
3275 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3276 | vhost->discovery_threads--; | |
3277 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3278 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3279 | } else | |
3280 | tgt_dbg(tgt, "Sent process login\n"); | |
3281 | } | |
3282 | ||
3283 | /** | |
3284 | * ibmvfc_tgt_plogi_done - Completion handler for Port Login | |
3285 | * @evt: ibmvfc event struct | |
3286 | * | |
3287 | **/ | |
3288 | static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) | |
3289 | { | |
3290 | struct ibmvfc_target *tgt = evt->tgt; | |
3291 | struct ibmvfc_host *vhost = evt->vhost; | |
3292 | struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; | |
3293 | u32 status = rsp->common.status; | |
7d0e4622 | 3294 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
3295 | |
3296 | vhost->discovery_threads--; | |
3297 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3298 | switch (status) { | |
3299 | case IBMVFC_MAD_SUCCESS: | |
3300 | tgt_dbg(tgt, "Port Login succeeded\n"); | |
3301 | if (tgt->ids.port_name && | |
3302 | tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { | |
3303 | vhost->reinit = 1; | |
3304 | tgt_dbg(tgt, "Port re-init required\n"); | |
3305 | break; | |
3306 | } | |
3307 | tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); | |
3308 | tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); | |
3309 | tgt->ids.port_id = tgt->scsi_id; | |
072b91f9 BK |
3310 | memcpy(&tgt->service_parms, &rsp->service_parms, |
3311 | sizeof(tgt->service_parms)); | |
3312 | memcpy(&tgt->service_parms_change, &rsp->service_parms_change, | |
3313 | sizeof(tgt->service_parms_change)); | |
3314 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); | |
3315 | break; | |
3316 | case IBMVFC_MAD_DRIVER_FAILED: | |
3317 | break; | |
3318 | case IBMVFC_MAD_CRQ_ERROR: | |
3319 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); | |
3320 | break; | |
3321 | case IBMVFC_MAD_FAILED: | |
3322 | default: | |
072b91f9 | 3323 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
7d0e4622 | 3324 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
10e79499 BK |
3325 | else |
3326 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
7d0e4622 BK |
3327 | |
3328 | tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", | |
3329 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, | |
3330 | ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, | |
3331 | ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); | |
072b91f9 BK |
3332 | break; |
3333 | }; | |
3334 | ||
3335 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3336 | ibmvfc_free_event(evt); | |
3337 | wake_up(&vhost->work_wait_q); | |
3338 | } | |
3339 | ||
3340 | /** | |
3341 | * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target | |
3342 | * @tgt: ibmvfc target struct | |
3343 | * | |
3344 | **/ | |
3345 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) | |
3346 | { | |
3347 | struct ibmvfc_port_login *plogi; | |
3348 | struct ibmvfc_host *vhost = tgt->vhost; | |
3349 | struct ibmvfc_event *evt; | |
3350 | ||
3351 | if (vhost->discovery_threads >= disc_threads) | |
3352 | return; | |
3353 | ||
3354 | kref_get(&tgt->kref); | |
017b2ae3 | 3355 | tgt->logo_rcvd = 0; |
072b91f9 BK |
3356 | evt = ibmvfc_get_event(vhost); |
3357 | vhost->discovery_threads++; | |
3358 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
3359 | ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); | |
3360 | evt->tgt = tgt; | |
3361 | plogi = &evt->iu.plogi; | |
3362 | memset(plogi, 0, sizeof(*plogi)); | |
3363 | plogi->common.version = 1; | |
3364 | plogi->common.opcode = IBMVFC_PORT_LOGIN; | |
3365 | plogi->common.length = sizeof(*plogi); | |
3366 | plogi->scsi_id = tgt->scsi_id; | |
3367 | ||
3368 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3369 | vhost->discovery_threads--; | |
3370 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3371 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3372 | } else | |
3373 | tgt_dbg(tgt, "Sent port login\n"); | |
3374 | } | |
3375 | ||
3376 | /** | |
3377 | * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD | |
3378 | * @evt: ibmvfc event struct | |
3379 | * | |
3380 | **/ | |
3381 | static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) | |
3382 | { | |
3383 | struct ibmvfc_target *tgt = evt->tgt; | |
3384 | struct ibmvfc_host *vhost = evt->vhost; | |
3385 | struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; | |
3386 | u32 status = rsp->common.status; | |
3387 | ||
3388 | vhost->discovery_threads--; | |
3389 | ibmvfc_free_event(evt); | |
3390 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3391 | ||
3392 | switch (status) { | |
3393 | case IBMVFC_MAD_SUCCESS: | |
3394 | tgt_dbg(tgt, "Implicit Logout succeeded\n"); | |
3395 | break; | |
3396 | case IBMVFC_MAD_DRIVER_FAILED: | |
3397 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3398 | wake_up(&vhost->work_wait_q); | |
3399 | return; | |
3400 | case IBMVFC_MAD_FAILED: | |
3401 | default: | |
3402 | tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); | |
3403 | break; | |
3404 | }; | |
3405 | ||
3406 | if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) | |
3407 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); | |
3408 | else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && | |
3409 | tgt->scsi_id != tgt->new_scsi_id) | |
3410 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
3411 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3412 | wake_up(&vhost->work_wait_q); | |
3413 | } | |
3414 | ||
3415 | /** | |
3416 | * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target | |
3417 | * @tgt: ibmvfc target struct | |
3418 | * | |
3419 | **/ | |
3420 | static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) | |
3421 | { | |
3422 | struct ibmvfc_implicit_logout *mad; | |
3423 | struct ibmvfc_host *vhost = tgt->vhost; | |
3424 | struct ibmvfc_event *evt; | |
3425 | ||
3426 | if (vhost->discovery_threads >= disc_threads) | |
3427 | return; | |
3428 | ||
3429 | kref_get(&tgt->kref); | |
3430 | evt = ibmvfc_get_event(vhost); | |
3431 | vhost->discovery_threads++; | |
3432 | ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); | |
3433 | evt->tgt = tgt; | |
3434 | mad = &evt->iu.implicit_logout; | |
3435 | memset(mad, 0, sizeof(*mad)); | |
3436 | mad->common.version = 1; | |
3437 | mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; | |
3438 | mad->common.length = sizeof(*mad); | |
3439 | mad->old_scsi_id = tgt->scsi_id; | |
3440 | ||
3441 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
3442 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3443 | vhost->discovery_threads--; | |
3444 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3445 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3446 | } else | |
3447 | tgt_dbg(tgt, "Sent Implicit Logout\n"); | |
3448 | } | |
3449 | ||
989b8545 BK |
3450 | /** |
3451 | * ibmvfc_adisc_needs_plogi - Does device need PLOGI? | |
3452 | * @mad: ibmvfc passthru mad struct | |
3453 | * @tgt: ibmvfc target struct | |
3454 | * | |
3455 | * Returns: | |
3456 | * 1 if PLOGI needed / 0 if PLOGI not needed | |
3457 | **/ | |
3458 | static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, | |
3459 | struct ibmvfc_target *tgt) | |
3460 | { | |
3461 | if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, | |
3462 | sizeof(tgt->ids.port_name))) | |
3463 | return 1; | |
3464 | if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, | |
3465 | sizeof(tgt->ids.node_name))) | |
3466 | return 1; | |
3467 | if (mad->fc_iu.response[6] != tgt->scsi_id) | |
3468 | return 1; | |
3469 | return 0; | |
3470 | } | |
3471 | ||
3472 | /** | |
3473 | * ibmvfc_tgt_adisc_done - Completion handler for ADISC | |
3474 | * @evt: ibmvfc event struct | |
3475 | * | |
3476 | **/ | |
3477 | static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) | |
3478 | { | |
3479 | struct ibmvfc_target *tgt = evt->tgt; | |
3480 | struct ibmvfc_host *vhost = evt->vhost; | |
3481 | struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; | |
3482 | u32 status = mad->common.status; | |
3483 | u8 fc_reason, fc_explain; | |
3484 | ||
3485 | vhost->discovery_threads--; | |
3486 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
10501e1c | 3487 | del_timer(&tgt->timer); |
989b8545 BK |
3488 | |
3489 | switch (status) { | |
3490 | case IBMVFC_MAD_SUCCESS: | |
3491 | tgt_dbg(tgt, "ADISC succeeded\n"); | |
3492 | if (ibmvfc_adisc_needs_plogi(mad, tgt)) | |
5e47167b | 3493 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
989b8545 BK |
3494 | break; |
3495 | case IBMVFC_MAD_DRIVER_FAILED: | |
3496 | break; | |
3497 | case IBMVFC_MAD_FAILED: | |
3498 | default: | |
5e47167b | 3499 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
989b8545 BK |
3500 | fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; |
3501 | fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; | |
3502 | tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", | |
3503 | ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), | |
3504 | mad->iu.status, mad->iu.error, | |
3505 | ibmvfc_get_fc_type(fc_reason), fc_reason, | |
3506 | ibmvfc_get_ls_explain(fc_explain), fc_explain, status); | |
3507 | break; | |
3508 | }; | |
3509 | ||
3510 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3511 | ibmvfc_free_event(evt); | |
3512 | wake_up(&vhost->work_wait_q); | |
3513 | } | |
3514 | ||
3515 | /** | |
3516 | * ibmvfc_init_passthru - Initialize an event struct for FC passthru | |
3517 | * @evt: ibmvfc event struct | |
3518 | * | |
3519 | **/ | |
3520 | static void ibmvfc_init_passthru(struct ibmvfc_event *evt) | |
3521 | { | |
3522 | struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; | |
3523 | ||
3524 | memset(mad, 0, sizeof(*mad)); | |
3525 | mad->common.version = 1; | |
3526 | mad->common.opcode = IBMVFC_PASSTHRU; | |
3527 | mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); | |
3528 | mad->cmd_ioba.va = (u64)evt->crq.ioba + | |
3529 | offsetof(struct ibmvfc_passthru_mad, iu); | |
3530 | mad->cmd_ioba.len = sizeof(mad->iu); | |
3531 | mad->iu.cmd_len = sizeof(mad->fc_iu.payload); | |
3532 | mad->iu.rsp_len = sizeof(mad->fc_iu.response); | |
3533 | mad->iu.cmd.va = (u64)evt->crq.ioba + | |
3534 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + | |
3535 | offsetof(struct ibmvfc_passthru_fc_iu, payload); | |
3536 | mad->iu.cmd.len = sizeof(mad->fc_iu.payload); | |
3537 | mad->iu.rsp.va = (u64)evt->crq.ioba + | |
3538 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + | |
3539 | offsetof(struct ibmvfc_passthru_fc_iu, response); | |
3540 | mad->iu.rsp.len = sizeof(mad->fc_iu.response); | |
3541 | } | |
3542 | ||
10501e1c BK |
3543 | /** |
3544 | * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC | |
3545 | * @evt: ibmvfc event struct | |
3546 | * | |
3547 | * Just cleanup this event struct. Everything else is handled by | |
3548 | * the ADISC completion handler. If the ADISC never actually comes | |
3549 | * back, we still have the timer running on the ADISC event struct | |
3550 | * which will fire and cause the CRQ to get reset. | |
3551 | * | |
3552 | **/ | |
3553 | static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) | |
3554 | { | |
3555 | struct ibmvfc_host *vhost = evt->vhost; | |
3556 | struct ibmvfc_target *tgt = evt->tgt; | |
3557 | ||
3558 | tgt_dbg(tgt, "ADISC cancel complete\n"); | |
3559 | vhost->abort_threads--; | |
3560 | ibmvfc_free_event(evt); | |
3561 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3562 | wake_up(&vhost->work_wait_q); | |
3563 | } | |
3564 | ||
3565 | /** | |
3566 | * ibmvfc_adisc_timeout - Handle an ADISC timeout | |
3567 | * @tgt: ibmvfc target struct | |
3568 | * | |
3569 | * If an ADISC times out, send a cancel. If the cancel times | |
3570 | * out, reset the CRQ. When the ADISC comes back as cancelled, | |
3571 | * log back into the target. | |
3572 | **/ | |
3573 | static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) | |
3574 | { | |
3575 | struct ibmvfc_host *vhost = tgt->vhost; | |
3576 | struct ibmvfc_event *evt; | |
3577 | struct ibmvfc_tmf *tmf; | |
3578 | unsigned long flags; | |
3579 | int rc; | |
3580 | ||
3581 | tgt_dbg(tgt, "ADISC timeout\n"); | |
3582 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3583 | if (vhost->abort_threads >= disc_threads || | |
3584 | tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || | |
3585 | vhost->state != IBMVFC_INITIALIZING || | |
3586 | vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { | |
3587 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3588 | return; | |
3589 | } | |
3590 | ||
3591 | vhost->abort_threads++; | |
3592 | kref_get(&tgt->kref); | |
3593 | evt = ibmvfc_get_event(vhost); | |
3594 | ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); | |
3595 | ||
3596 | evt->tgt = tgt; | |
3597 | tmf = &evt->iu.tmf; | |
3598 | memset(tmf, 0, sizeof(*tmf)); | |
3599 | tmf->common.version = 1; | |
3600 | tmf->common.opcode = IBMVFC_TMF_MAD; | |
3601 | tmf->common.length = sizeof(*tmf); | |
3602 | tmf->scsi_id = tgt->scsi_id; | |
3603 | tmf->cancel_key = tgt->cancel_key; | |
3604 | ||
3605 | rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
3606 | ||
3607 | if (rc) { | |
3608 | tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); | |
3609 | vhost->abort_threads--; | |
3610 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3611 | __ibmvfc_reset_host(vhost); | |
3612 | } else | |
3613 | tgt_dbg(tgt, "Attempting to cancel ADISC\n"); | |
3614 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3615 | } | |
3616 | ||
989b8545 BK |
3617 | /** |
3618 | * ibmvfc_tgt_adisc - Initiate an ADISC for specified target | |
3619 | * @tgt: ibmvfc target struct | |
3620 | * | |
10501e1c BK |
3621 | * When sending an ADISC we end up with two timers running. The |
3622 | * first timer is the timer in the ibmvfc target struct. If this | |
3623 | * fires, we send a cancel to the target. The second timer is the | |
3624 | * timer on the ibmvfc event for the ADISC, which is longer. If that | |
3625 | * fires, it means the ADISC timed out and our attempt to cancel it | |
3626 | * also failed, so we need to reset the CRQ. | |
989b8545 BK |
3627 | **/ |
3628 | static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) | |
3629 | { | |
3630 | struct ibmvfc_passthru_mad *mad; | |
3631 | struct ibmvfc_host *vhost = tgt->vhost; | |
3632 | struct ibmvfc_event *evt; | |
3633 | ||
3634 | if (vhost->discovery_threads >= disc_threads) | |
3635 | return; | |
3636 | ||
3637 | kref_get(&tgt->kref); | |
3638 | evt = ibmvfc_get_event(vhost); | |
3639 | vhost->discovery_threads++; | |
3640 | ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); | |
3641 | evt->tgt = tgt; | |
3642 | ||
3643 | ibmvfc_init_passthru(evt); | |
3644 | mad = &evt->iu.passthru; | |
3645 | mad->iu.flags = IBMVFC_FC_ELS; | |
3646 | mad->iu.scsi_id = tgt->scsi_id; | |
10501e1c | 3647 | mad->iu.cancel_key = tgt->cancel_key; |
989b8545 BK |
3648 | |
3649 | mad->fc_iu.payload[0] = IBMVFC_ADISC; | |
3650 | memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, | |
3651 | sizeof(vhost->login_buf->resp.port_name)); | |
3652 | memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, | |
3653 | sizeof(vhost->login_buf->resp.node_name)); | |
3654 | mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; | |
3655 | ||
10501e1c BK |
3656 | if (timer_pending(&tgt->timer)) |
3657 | mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); | |
3658 | else { | |
3659 | tgt->timer.data = (unsigned long) tgt; | |
3660 | tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); | |
3661 | tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; | |
3662 | add_timer(&tgt->timer); | |
3663 | } | |
3664 | ||
989b8545 | 3665 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
10501e1c | 3666 | if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { |
989b8545 | 3667 | vhost->discovery_threads--; |
10501e1c | 3668 | del_timer(&tgt->timer); |
989b8545 BK |
3669 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
3670 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3671 | } else | |
3672 | tgt_dbg(tgt, "Sent ADISC\n"); | |
3673 | } | |
3674 | ||
072b91f9 BK |
3675 | /** |
3676 | * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD | |
3677 | * @evt: ibmvfc event struct | |
3678 | * | |
3679 | **/ | |
3680 | static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) | |
3681 | { | |
3682 | struct ibmvfc_target *tgt = evt->tgt; | |
3683 | struct ibmvfc_host *vhost = evt->vhost; | |
3684 | struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; | |
3685 | u32 status = rsp->common.status; | |
7d0e4622 | 3686 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
3687 | |
3688 | vhost->discovery_threads--; | |
3689 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3690 | switch (status) { | |
3691 | case IBMVFC_MAD_SUCCESS: | |
3692 | tgt_dbg(tgt, "Query Target succeeded\n"); | |
3693 | tgt->new_scsi_id = rsp->scsi_id; | |
3694 | if (rsp->scsi_id != tgt->scsi_id) | |
3695 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); | |
989b8545 BK |
3696 | else |
3697 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); | |
072b91f9 BK |
3698 | break; |
3699 | case IBMVFC_MAD_DRIVER_FAILED: | |
3700 | break; | |
3701 | case IBMVFC_MAD_CRQ_ERROR: | |
3702 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); | |
3703 | break; | |
3704 | case IBMVFC_MAD_FAILED: | |
3705 | default: | |
072b91f9 BK |
3706 | if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && |
3707 | rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && | |
3708 | rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) | |
3709 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
3710 | else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) | |
7d0e4622 | 3711 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); |
10e79499 BK |
3712 | else |
3713 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
7d0e4622 BK |
3714 | |
3715 | tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", | |
3716 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, | |
3717 | ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, | |
3718 | ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); | |
072b91f9 BK |
3719 | break; |
3720 | }; | |
3721 | ||
3722 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3723 | ibmvfc_free_event(evt); | |
3724 | wake_up(&vhost->work_wait_q); | |
3725 | } | |
3726 | ||
3727 | /** | |
3728 | * ibmvfc_tgt_query_target - Initiate a Query Target for specified target | |
3729 | * @tgt: ibmvfc target struct | |
3730 | * | |
3731 | **/ | |
3732 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) | |
3733 | { | |
3734 | struct ibmvfc_query_tgt *query_tgt; | |
3735 | struct ibmvfc_host *vhost = tgt->vhost; | |
3736 | struct ibmvfc_event *evt; | |
3737 | ||
3738 | if (vhost->discovery_threads >= disc_threads) | |
3739 | return; | |
3740 | ||
3741 | kref_get(&tgt->kref); | |
3742 | evt = ibmvfc_get_event(vhost); | |
3743 | vhost->discovery_threads++; | |
3744 | evt->tgt = tgt; | |
3745 | ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); | |
3746 | query_tgt = &evt->iu.query_tgt; | |
3747 | memset(query_tgt, 0, sizeof(*query_tgt)); | |
3748 | query_tgt->common.version = 1; | |
3749 | query_tgt->common.opcode = IBMVFC_QUERY_TARGET; | |
3750 | query_tgt->common.length = sizeof(*query_tgt); | |
3751 | query_tgt->wwpn = tgt->ids.port_name; | |
3752 | ||
3753 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
3754 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3755 | vhost->discovery_threads--; | |
3756 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3757 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3758 | } else | |
3759 | tgt_dbg(tgt, "Sent Query Target\n"); | |
3760 | } | |
3761 | ||
3762 | /** | |
3763 | * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target | |
3764 | * @vhost: ibmvfc host struct | |
3765 | * @scsi_id: SCSI ID to allocate target for | |
3766 | * | |
3767 | * Returns: | |
3768 | * 0 on success / other on failure | |
3769 | **/ | |
3770 | static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) | |
3771 | { | |
3772 | struct ibmvfc_target *tgt; | |
3773 | unsigned long flags; | |
3774 | ||
3775 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3776 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
3777 | if (tgt->scsi_id == scsi_id) { | |
3778 | if (tgt->need_login) | |
3779 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); | |
3780 | goto unlock_out; | |
3781 | } | |
3782 | } | |
3783 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3784 | ||
7270b9bd | 3785 | tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); |
072b91f9 | 3786 | if (!tgt) { |
775a42ec | 3787 | dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", |
072b91f9 BK |
3788 | scsi_id); |
3789 | return -ENOMEM; | |
3790 | } | |
3791 | ||
0883e3b3 | 3792 | memset(tgt, 0, sizeof(*tgt)); |
072b91f9 BK |
3793 | tgt->scsi_id = scsi_id; |
3794 | tgt->new_scsi_id = scsi_id; | |
3795 | tgt->vhost = vhost; | |
3796 | tgt->need_login = 1; | |
10501e1c BK |
3797 | tgt->cancel_key = vhost->task_set++; |
3798 | init_timer(&tgt->timer); | |
072b91f9 BK |
3799 | kref_init(&tgt->kref); |
3800 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); | |
3801 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3802 | list_add_tail(&tgt->queue, &vhost->targets); | |
3803 | ||
3804 | unlock_out: | |
3805 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3806 | return 0; | |
3807 | } | |
3808 | ||
3809 | /** | |
3810 | * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets | |
3811 | * @vhost: ibmvfc host struct | |
3812 | * | |
3813 | * Returns: | |
3814 | * 0 on success / other on failure | |
3815 | **/ | |
3816 | static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) | |
3817 | { | |
3818 | int i, rc; | |
3819 | ||
3820 | for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) | |
3821 | rc = ibmvfc_alloc_target(vhost, | |
3822 | vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); | |
3823 | ||
3824 | return rc; | |
3825 | } | |
3826 | ||
3827 | /** | |
3828 | * ibmvfc_discover_targets_done - Completion handler for discover targets MAD | |
3829 | * @evt: ibmvfc event struct | |
3830 | * | |
3831 | **/ | |
3832 | static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) | |
3833 | { | |
3834 | struct ibmvfc_host *vhost = evt->vhost; | |
3835 | struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; | |
3836 | u32 mad_status = rsp->common.status; | |
7d0e4622 | 3837 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
3838 | |
3839 | switch (mad_status) { | |
3840 | case IBMVFC_MAD_SUCCESS: | |
3841 | ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); | |
3842 | vhost->num_targets = rsp->num_written; | |
3843 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); | |
3844 | break; | |
3845 | case IBMVFC_MAD_FAILED: | |
7d0e4622 BK |
3846 | level += ibmvfc_retry_host_init(vhost); |
3847 | ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", | |
3848 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); | |
072b91f9 BK |
3849 | break; |
3850 | case IBMVFC_MAD_DRIVER_FAILED: | |
3851 | break; | |
3852 | default: | |
3853 | dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); | |
3854 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3855 | break; | |
3856 | } | |
3857 | ||
3858 | ibmvfc_free_event(evt); | |
3859 | wake_up(&vhost->work_wait_q); | |
3860 | } | |
3861 | ||
3862 | /** | |
3863 | * ibmvfc_discover_targets - Send Discover Targets MAD | |
3864 | * @vhost: ibmvfc host struct | |
3865 | * | |
3866 | **/ | |
3867 | static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) | |
3868 | { | |
3869 | struct ibmvfc_discover_targets *mad; | |
3870 | struct ibmvfc_event *evt = ibmvfc_get_event(vhost); | |
3871 | ||
3872 | ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); | |
3873 | mad = &evt->iu.discover_targets; | |
3874 | memset(mad, 0, sizeof(*mad)); | |
3875 | mad->common.version = 1; | |
3876 | mad->common.opcode = IBMVFC_DISC_TARGETS; | |
3877 | mad->common.length = sizeof(*mad); | |
3878 | mad->bufflen = vhost->disc_buf_sz; | |
3879 | mad->buffer.va = vhost->disc_buf_dma; | |
3880 | mad->buffer.len = vhost->disc_buf_sz; | |
3881 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); | |
3882 | ||
3883 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) | |
3884 | ibmvfc_dbg(vhost, "Sent discover targets\n"); | |
3885 | else | |
3886 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3887 | } | |
3888 | ||
3889 | /** | |
3890 | * ibmvfc_npiv_login_done - Completion handler for NPIV Login | |
3891 | * @evt: ibmvfc event struct | |
3892 | * | |
3893 | **/ | |
3894 | static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) | |
3895 | { | |
3896 | struct ibmvfc_host *vhost = evt->vhost; | |
3897 | u32 mad_status = evt->xfer_iu->npiv_login.common.status; | |
3898 | struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; | |
3899 | unsigned int npiv_max_sectors; | |
7d0e4622 | 3900 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
3901 | |
3902 | switch (mad_status) { | |
3903 | case IBMVFC_MAD_SUCCESS: | |
3904 | ibmvfc_free_event(evt); | |
3905 | break; | |
3906 | case IBMVFC_MAD_FAILED: | |
072b91f9 | 3907 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
7d0e4622 | 3908 | level += ibmvfc_retry_host_init(vhost); |
072b91f9 BK |
3909 | else |
3910 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
7d0e4622 BK |
3911 | ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", |
3912 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); | |
072b91f9 BK |
3913 | ibmvfc_free_event(evt); |
3914 | return; | |
3915 | case IBMVFC_MAD_CRQ_ERROR: | |
3916 | ibmvfc_retry_host_init(vhost); | |
3917 | case IBMVFC_MAD_DRIVER_FAILED: | |
3918 | ibmvfc_free_event(evt); | |
3919 | return; | |
3920 | default: | |
3921 | dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); | |
3922 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3923 | ibmvfc_free_event(evt); | |
3924 | return; | |
3925 | } | |
3926 | ||
3927 | vhost->client_migrated = 0; | |
3928 | ||
3929 | if (!(rsp->flags & IBMVFC_NATIVE_FC)) { | |
3930 | dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", | |
3931 | rsp->flags); | |
3932 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3933 | wake_up(&vhost->work_wait_q); | |
3934 | return; | |
3935 | } | |
3936 | ||
3937 | if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { | |
3938 | dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", | |
3939 | rsp->max_cmds); | |
3940 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3941 | wake_up(&vhost->work_wait_q); | |
3942 | return; | |
3943 | } | |
3944 | ||
79111d08 | 3945 | vhost->logged_in = 1; |
072b91f9 BK |
3946 | npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); |
3947 | dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", | |
3948 | rsp->partition_name, rsp->device_name, rsp->port_loc_code, | |
3949 | rsp->drc_name, npiv_max_sectors); | |
3950 | ||
3951 | fc_host_fabric_name(vhost->host) = rsp->node_name; | |
3952 | fc_host_node_name(vhost->host) = rsp->node_name; | |
3953 | fc_host_port_name(vhost->host) = rsp->port_name; | |
3954 | fc_host_port_id(vhost->host) = rsp->scsi_id; | |
3955 | fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; | |
3956 | fc_host_supported_classes(vhost->host) = 0; | |
3957 | if (rsp->service_parms.class1_parms[0] & 0x80000000) | |
3958 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; | |
3959 | if (rsp->service_parms.class2_parms[0] & 0x80000000) | |
3960 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; | |
3961 | if (rsp->service_parms.class3_parms[0] & 0x80000000) | |
3962 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; | |
3963 | fc_host_maxframe_size(vhost->host) = | |
3964 | rsp->service_parms.common.bb_rcv_sz & 0x0fff; | |
3965 | ||
3966 | vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; | |
3967 | vhost->host->max_sectors = npiv_max_sectors; | |
3968 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); | |
3969 | wake_up(&vhost->work_wait_q); | |
3970 | } | |
3971 | ||
3972 | /** | |
3973 | * ibmvfc_npiv_login - Sends NPIV login | |
3974 | * @vhost: ibmvfc host struct | |
3975 | * | |
3976 | **/ | |
3977 | static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) | |
3978 | { | |
3979 | struct ibmvfc_npiv_login_mad *mad; | |
3980 | struct ibmvfc_event *evt = ibmvfc_get_event(vhost); | |
3981 | ||
3982 | ibmvfc_gather_partition_info(vhost); | |
3983 | ibmvfc_set_login_info(vhost); | |
3984 | ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); | |
3985 | ||
3986 | memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); | |
3987 | mad = &evt->iu.npiv_login; | |
3988 | memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); | |
3989 | mad->common.version = 1; | |
3990 | mad->common.opcode = IBMVFC_NPIV_LOGIN; | |
3991 | mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); | |
3992 | mad->buffer.va = vhost->login_buf_dma; | |
3993 | mad->buffer.len = sizeof(*vhost->login_buf); | |
3994 | ||
072b91f9 BK |
3995 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
3996 | ||
3997 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) | |
3998 | ibmvfc_dbg(vhost, "Sent NPIV login\n"); | |
3999 | else | |
4000 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
4001 | }; | |
4002 | ||
79111d08 BK |
4003 | /** |
4004 | * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout | |
4005 | * @vhost: ibmvfc host struct | |
4006 | * | |
4007 | **/ | |
4008 | static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) | |
4009 | { | |
4010 | struct ibmvfc_host *vhost = evt->vhost; | |
4011 | u32 mad_status = evt->xfer_iu->npiv_logout.common.status; | |
4012 | ||
4013 | ibmvfc_free_event(evt); | |
4014 | ||
4015 | switch (mad_status) { | |
4016 | case IBMVFC_MAD_SUCCESS: | |
4017 | if (list_empty(&vhost->sent) && | |
4018 | vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { | |
861890c6 | 4019 | ibmvfc_init_host(vhost); |
79111d08 BK |
4020 | return; |
4021 | } | |
4022 | break; | |
4023 | case IBMVFC_MAD_FAILED: | |
4024 | case IBMVFC_MAD_NOT_SUPPORTED: | |
4025 | case IBMVFC_MAD_CRQ_ERROR: | |
4026 | case IBMVFC_MAD_DRIVER_FAILED: | |
4027 | default: | |
4028 | ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); | |
4029 | break; | |
4030 | } | |
4031 | ||
4032 | ibmvfc_hard_reset_host(vhost); | |
4033 | } | |
4034 | ||
4035 | /** | |
4036 | * ibmvfc_npiv_logout - Issue an NPIV Logout | |
4037 | * @vhost: ibmvfc host struct | |
4038 | * | |
4039 | **/ | |
4040 | static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) | |
4041 | { | |
4042 | struct ibmvfc_npiv_logout_mad *mad; | |
4043 | struct ibmvfc_event *evt; | |
4044 | ||
4045 | evt = ibmvfc_get_event(vhost); | |
4046 | ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); | |
4047 | ||
4048 | mad = &evt->iu.npiv_logout; | |
4049 | memset(mad, 0, sizeof(*mad)); | |
4050 | mad->common.version = 1; | |
4051 | mad->common.opcode = IBMVFC_NPIV_LOGOUT; | |
4052 | mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad); | |
4053 | ||
4054 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); | |
4055 | ||
4056 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) | |
4057 | ibmvfc_dbg(vhost, "Sent NPIV logout\n"); | |
4058 | else | |
4059 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
4060 | } | |
4061 | ||
072b91f9 BK |
4062 | /** |
4063 | * ibmvfc_dev_init_to_do - Is there target initialization work to do? | |
4064 | * @vhost: ibmvfc host struct | |
4065 | * | |
4066 | * Returns: | |
4067 | * 1 if work to do / 0 if not | |
4068 | **/ | |
4069 | static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) | |
4070 | { | |
4071 | struct ibmvfc_target *tgt; | |
4072 | ||
4073 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
4074 | if (tgt->action == IBMVFC_TGT_ACTION_INIT || | |
4075 | tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) | |
4076 | return 1; | |
4077 | } | |
4078 | ||
4079 | return 0; | |
4080 | } | |
4081 | ||
4082 | /** | |
4083 | * __ibmvfc_work_to_do - Is there task level work to do? (no locking) | |
4084 | * @vhost: ibmvfc host struct | |
4085 | * | |
4086 | * Returns: | |
4087 | * 1 if work to do / 0 if not | |
4088 | **/ | |
4089 | static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) | |
4090 | { | |
4091 | struct ibmvfc_target *tgt; | |
4092 | ||
4093 | if (kthread_should_stop()) | |
4094 | return 1; | |
4095 | switch (vhost->action) { | |
4096 | case IBMVFC_HOST_ACTION_NONE: | |
4097 | case IBMVFC_HOST_ACTION_INIT_WAIT: | |
79111d08 | 4098 | case IBMVFC_HOST_ACTION_LOGO_WAIT: |
072b91f9 BK |
4099 | return 0; |
4100 | case IBMVFC_HOST_ACTION_TGT_INIT: | |
4101 | case IBMVFC_HOST_ACTION_QUERY_TGTS: | |
4102 | if (vhost->discovery_threads == disc_threads) | |
4103 | return 0; | |
4104 | list_for_each_entry(tgt, &vhost->targets, queue) | |
4105 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) | |
4106 | return 1; | |
4107 | list_for_each_entry(tgt, &vhost->targets, queue) | |
4108 | if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) | |
4109 | return 0; | |
4110 | return 1; | |
79111d08 | 4111 | case IBMVFC_HOST_ACTION_LOGO: |
072b91f9 BK |
4112 | case IBMVFC_HOST_ACTION_INIT: |
4113 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: | |
072b91f9 | 4114 | case IBMVFC_HOST_ACTION_TGT_DEL: |
10e79499 | 4115 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 BK |
4116 | case IBMVFC_HOST_ACTION_QUERY: |
4117 | default: | |
4118 | break; | |
4119 | }; | |
4120 | ||
4121 | return 1; | |
4122 | } | |
4123 | ||
4124 | /** | |
4125 | * ibmvfc_work_to_do - Is there task level work to do? | |
4126 | * @vhost: ibmvfc host struct | |
4127 | * | |
4128 | * Returns: | |
4129 | * 1 if work to do / 0 if not | |
4130 | **/ | |
4131 | static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) | |
4132 | { | |
4133 | unsigned long flags; | |
4134 | int rc; | |
4135 | ||
4136 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4137 | rc = __ibmvfc_work_to_do(vhost); | |
4138 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4139 | return rc; | |
4140 | } | |
4141 | ||
4142 | /** | |
4143 | * ibmvfc_log_ae - Log async events if necessary | |
4144 | * @vhost: ibmvfc host struct | |
4145 | * @events: events to log | |
4146 | * | |
4147 | **/ | |
4148 | static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) | |
4149 | { | |
4150 | if (events & IBMVFC_AE_RSCN) | |
4151 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); | |
4152 | if ((events & IBMVFC_AE_LINKDOWN) && | |
4153 | vhost->state >= IBMVFC_HALTED) | |
4154 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); | |
4155 | if ((events & IBMVFC_AE_LINKUP) && | |
4156 | vhost->state == IBMVFC_INITIALIZING) | |
4157 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); | |
4158 | } | |
4159 | ||
4160 | /** | |
4161 | * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port | |
4162 | * @tgt: ibmvfc target struct | |
4163 | * | |
4164 | **/ | |
4165 | static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) | |
4166 | { | |
4167 | struct ibmvfc_host *vhost = tgt->vhost; | |
43c8da90 | 4168 | struct fc_rport *rport; |
072b91f9 BK |
4169 | unsigned long flags; |
4170 | ||
43c8da90 BK |
4171 | tgt_dbg(tgt, "Adding rport\n"); |
4172 | rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); | |
4173 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4174 | ||
4175 | if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { | |
4176 | tgt_dbg(tgt, "Deleting rport\n"); | |
4177 | list_del(&tgt->queue); | |
0883e3b3 | 4178 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
43c8da90 BK |
4179 | fc_remote_port_delete(rport); |
4180 | del_timer_sync(&tgt->timer); | |
4181 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
0883e3b3 BK |
4182 | return; |
4183 | } | |
4184 | ||
072b91f9 BK |
4185 | if (rport) { |
4186 | tgt_dbg(tgt, "rport add succeeded\n"); | |
43c8da90 | 4187 | tgt->rport = rport; |
072b91f9 BK |
4188 | rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; |
4189 | rport->supported_classes = 0; | |
52d7e861 | 4190 | tgt->target_id = rport->scsi_target_id; |
072b91f9 BK |
4191 | if (tgt->service_parms.class1_parms[0] & 0x80000000) |
4192 | rport->supported_classes |= FC_COS_CLASS1; | |
4193 | if (tgt->service_parms.class2_parms[0] & 0x80000000) | |
4194 | rport->supported_classes |= FC_COS_CLASS2; | |
4195 | if (tgt->service_parms.class3_parms[0] & 0x80000000) | |
4196 | rport->supported_classes |= FC_COS_CLASS3; | |
d31429e1 BK |
4197 | if (rport->rqst_q) |
4198 | blk_queue_max_hw_segments(rport->rqst_q, 1); | |
072b91f9 BK |
4199 | } else |
4200 | tgt_dbg(tgt, "rport add failed\n"); | |
4201 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4202 | } | |
4203 | ||
4204 | /** | |
4205 | * ibmvfc_do_work - Do task level work | |
4206 | * @vhost: ibmvfc host struct | |
4207 | * | |
4208 | **/ | |
4209 | static void ibmvfc_do_work(struct ibmvfc_host *vhost) | |
4210 | { | |
4211 | struct ibmvfc_target *tgt; | |
4212 | unsigned long flags; | |
4213 | struct fc_rport *rport; | |
4214 | ||
4215 | ibmvfc_log_ae(vhost, vhost->events_to_log); | |
4216 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4217 | vhost->events_to_log = 0; | |
4218 | switch (vhost->action) { | |
4219 | case IBMVFC_HOST_ACTION_NONE: | |
79111d08 | 4220 | case IBMVFC_HOST_ACTION_LOGO_WAIT: |
072b91f9 BK |
4221 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
4222 | break; | |
79111d08 BK |
4223 | case IBMVFC_HOST_ACTION_LOGO: |
4224 | vhost->job_step(vhost); | |
4225 | break; | |
072b91f9 BK |
4226 | case IBMVFC_HOST_ACTION_INIT: |
4227 | BUG_ON(vhost->state != IBMVFC_INITIALIZING); | |
1c41fa82 BK |
4228 | if (vhost->delay_init) { |
4229 | vhost->delay_init = 0; | |
4230 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
d2131b33 | 4231 | ssleep(15); |
1c41fa82 BK |
4232 | return; |
4233 | } else | |
4234 | vhost->job_step(vhost); | |
072b91f9 BK |
4235 | break; |
4236 | case IBMVFC_HOST_ACTION_QUERY: | |
4237 | list_for_each_entry(tgt, &vhost->targets, queue) | |
4238 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); | |
4239 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); | |
4240 | break; | |
4241 | case IBMVFC_HOST_ACTION_QUERY_TGTS: | |
4242 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
4243 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) { | |
4244 | tgt->job_step(tgt); | |
4245 | break; | |
4246 | } | |
4247 | } | |
4248 | ||
4249 | if (!ibmvfc_dev_init_to_do(vhost)) | |
4250 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); | |
4251 | break; | |
4252 | case IBMVFC_HOST_ACTION_TGT_DEL: | |
10e79499 | 4253 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 BK |
4254 | list_for_each_entry(tgt, &vhost->targets, queue) { |
4255 | if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { | |
4256 | tgt_dbg(tgt, "Deleting rport\n"); | |
4257 | rport = tgt->rport; | |
4258 | tgt->rport = NULL; | |
4259 | list_del(&tgt->queue); | |
4260 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4261 | if (rport) | |
4262 | fc_remote_port_delete(rport); | |
10501e1c | 4263 | del_timer_sync(&tgt->timer); |
072b91f9 BK |
4264 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
4265 | return; | |
4266 | } | |
4267 | } | |
4268 | ||
4269 | if (vhost->state == IBMVFC_INITIALIZING) { | |
10e79499 | 4270 | if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { |
43c8da90 BK |
4271 | if (vhost->reinit) { |
4272 | vhost->reinit = 0; | |
4273 | scsi_block_requests(vhost->host); | |
4274 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); | |
4275 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4276 | } else { | |
4277 | ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); | |
4278 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); | |
4279 | wake_up(&vhost->init_wait_q); | |
4280 | schedule_work(&vhost->rport_add_work_q); | |
4281 | vhost->init_retries = 0; | |
4282 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4283 | scsi_unblock_requests(vhost->host); | |
4284 | } | |
4285 | ||
10e79499 BK |
4286 | return; |
4287 | } else { | |
4288 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); | |
4289 | vhost->job_step = ibmvfc_discover_targets; | |
4290 | } | |
072b91f9 BK |
4291 | } else { |
4292 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); | |
4293 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4294 | scsi_unblock_requests(vhost->host); | |
4295 | wake_up(&vhost->init_wait_q); | |
4296 | return; | |
4297 | } | |
4298 | break; | |
4299 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: | |
4300 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); | |
4301 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4302 | ibmvfc_alloc_targets(vhost); | |
4303 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4304 | break; | |
4305 | case IBMVFC_HOST_ACTION_TGT_INIT: | |
4306 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
4307 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) { | |
4308 | tgt->job_step(tgt); | |
4309 | break; | |
4310 | } | |
4311 | } | |
4312 | ||
10e79499 BK |
4313 | if (!ibmvfc_dev_init_to_do(vhost)) |
4314 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); | |
072b91f9 | 4315 | break; |
072b91f9 BK |
4316 | default: |
4317 | break; | |
4318 | }; | |
4319 | ||
4320 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4321 | } | |
4322 | ||
4323 | /** | |
4324 | * ibmvfc_work - Do task level work | |
4325 | * @data: ibmvfc host struct | |
4326 | * | |
4327 | * Returns: | |
4328 | * zero | |
4329 | **/ | |
4330 | static int ibmvfc_work(void *data) | |
4331 | { | |
4332 | struct ibmvfc_host *vhost = data; | |
4333 | int rc; | |
4334 | ||
4335 | set_user_nice(current, -20); | |
4336 | ||
4337 | while (1) { | |
4338 | rc = wait_event_interruptible(vhost->work_wait_q, | |
4339 | ibmvfc_work_to_do(vhost)); | |
4340 | ||
4341 | BUG_ON(rc); | |
4342 | ||
4343 | if (kthread_should_stop()) | |
4344 | break; | |
4345 | ||
4346 | ibmvfc_do_work(vhost); | |
4347 | } | |
4348 | ||
4349 | ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); | |
4350 | return 0; | |
4351 | } | |
4352 | ||
4353 | /** | |
4354 | * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor | |
4355 | * @vhost: ibmvfc host struct | |
4356 | * | |
4357 | * Allocates a page for messages, maps it for dma, and registers | |
4358 | * the crq with the hypervisor. | |
4359 | * | |
4360 | * Return value: | |
4361 | * zero on success / other on failure | |
4362 | **/ | |
4363 | static int ibmvfc_init_crq(struct ibmvfc_host *vhost) | |
4364 | { | |
4365 | int rc, retrc = -ENOMEM; | |
4366 | struct device *dev = vhost->dev; | |
4367 | struct vio_dev *vdev = to_vio_dev(dev); | |
4368 | struct ibmvfc_crq_queue *crq = &vhost->crq; | |
4369 | ||
4370 | ENTER; | |
4371 | crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); | |
4372 | ||
4373 | if (!crq->msgs) | |
4374 | return -ENOMEM; | |
4375 | ||
4376 | crq->size = PAGE_SIZE / sizeof(*crq->msgs); | |
4377 | crq->msg_token = dma_map_single(dev, crq->msgs, | |
4378 | PAGE_SIZE, DMA_BIDIRECTIONAL); | |
4379 | ||
8d8bb39b | 4380 | if (dma_mapping_error(dev, crq->msg_token)) |
072b91f9 BK |
4381 | goto map_failed; |
4382 | ||
4383 | retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, | |
4384 | crq->msg_token, PAGE_SIZE); | |
4385 | ||
4386 | if (rc == H_RESOURCE) | |
4387 | /* maybe kexecing and resource is busy. try a reset */ | |
4388 | retrc = rc = ibmvfc_reset_crq(vhost); | |
4389 | ||
4390 | if (rc == H_CLOSED) | |
4391 | dev_warn(dev, "Partner adapter not ready\n"); | |
4392 | else if (rc) { | |
4393 | dev_warn(dev, "Error %d opening adapter\n", rc); | |
4394 | goto reg_crq_failed; | |
4395 | } | |
4396 | ||
4397 | retrc = 0; | |
4398 | ||
039a0898 BK |
4399 | tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); |
4400 | ||
072b91f9 BK |
4401 | if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { |
4402 | dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); | |
4403 | goto req_irq_failed; | |
4404 | } | |
4405 | ||
4406 | if ((rc = vio_enable_interrupts(vdev))) { | |
4407 | dev_err(dev, "Error %d enabling interrupts\n", rc); | |
4408 | goto req_irq_failed; | |
4409 | } | |
4410 | ||
4411 | crq->cur = 0; | |
4412 | LEAVE; | |
4413 | return retrc; | |
4414 | ||
4415 | req_irq_failed: | |
039a0898 | 4416 | tasklet_kill(&vhost->tasklet); |
072b91f9 BK |
4417 | do { |
4418 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); | |
4419 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
4420 | reg_crq_failed: | |
4421 | dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); | |
4422 | map_failed: | |
4423 | free_page((unsigned long)crq->msgs); | |
4424 | return retrc; | |
4425 | } | |
4426 | ||
4427 | /** | |
4428 | * ibmvfc_free_mem - Free memory for vhost | |
4429 | * @vhost: ibmvfc host struct | |
4430 | * | |
4431 | * Return value: | |
4432 | * none | |
4433 | **/ | |
4434 | static void ibmvfc_free_mem(struct ibmvfc_host *vhost) | |
4435 | { | |
4436 | struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; | |
4437 | ||
4438 | ENTER; | |
4439 | mempool_destroy(vhost->tgt_pool); | |
4440 | kfree(vhost->trace); | |
4441 | dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, | |
4442 | vhost->disc_buf_dma); | |
4443 | dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), | |
4444 | vhost->login_buf, vhost->login_buf_dma); | |
4445 | dma_pool_destroy(vhost->sg_pool); | |
4446 | dma_unmap_single(vhost->dev, async_q->msg_token, | |
4447 | async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); | |
4448 | free_page((unsigned long)async_q->msgs); | |
4449 | LEAVE; | |
4450 | } | |
4451 | ||
4452 | /** | |
4453 | * ibmvfc_alloc_mem - Allocate memory for vhost | |
4454 | * @vhost: ibmvfc host struct | |
4455 | * | |
4456 | * Return value: | |
4457 | * 0 on success / non-zero on failure | |
4458 | **/ | |
4459 | static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) | |
4460 | { | |
4461 | struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; | |
4462 | struct device *dev = vhost->dev; | |
4463 | ||
4464 | ENTER; | |
4465 | async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); | |
4466 | if (!async_q->msgs) { | |
4467 | dev_err(dev, "Couldn't allocate async queue.\n"); | |
4468 | goto nomem; | |
4469 | } | |
4470 | ||
4471 | async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); | |
4472 | async_q->msg_token = dma_map_single(dev, async_q->msgs, | |
4473 | async_q->size * sizeof(*async_q->msgs), | |
4474 | DMA_BIDIRECTIONAL); | |
4475 | ||
8d8bb39b | 4476 | if (dma_mapping_error(dev, async_q->msg_token)) { |
072b91f9 BK |
4477 | dev_err(dev, "Failed to map async queue\n"); |
4478 | goto free_async_crq; | |
4479 | } | |
4480 | ||
4481 | vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, | |
4482 | SG_ALL * sizeof(struct srp_direct_buf), | |
4483 | sizeof(struct srp_direct_buf), 0); | |
4484 | ||
4485 | if (!vhost->sg_pool) { | |
4486 | dev_err(dev, "Failed to allocate sg pool\n"); | |
4487 | goto unmap_async_crq; | |
4488 | } | |
4489 | ||
4490 | vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), | |
4491 | &vhost->login_buf_dma, GFP_KERNEL); | |
4492 | ||
4493 | if (!vhost->login_buf) { | |
4494 | dev_err(dev, "Couldn't allocate NPIV login buffer\n"); | |
4495 | goto free_sg_pool; | |
4496 | } | |
4497 | ||
4498 | vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; | |
4499 | vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, | |
4500 | &vhost->disc_buf_dma, GFP_KERNEL); | |
4501 | ||
4502 | if (!vhost->disc_buf) { | |
4503 | dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); | |
4504 | goto free_login_buffer; | |
4505 | } | |
4506 | ||
4507 | vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, | |
4508 | sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); | |
4509 | ||
4510 | if (!vhost->trace) | |
4511 | goto free_disc_buffer; | |
4512 | ||
d6886692 | 4513 | vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, |
072b91f9 BK |
4514 | sizeof(struct ibmvfc_target)); |
4515 | ||
4516 | if (!vhost->tgt_pool) { | |
4517 | dev_err(dev, "Couldn't allocate target memory pool\n"); | |
4518 | goto free_trace; | |
4519 | } | |
4520 | ||
4521 | LEAVE; | |
4522 | return 0; | |
4523 | ||
4524 | free_trace: | |
4525 | kfree(vhost->trace); | |
4526 | free_disc_buffer: | |
4527 | dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, | |
4528 | vhost->disc_buf_dma); | |
4529 | free_login_buffer: | |
4530 | dma_free_coherent(dev, sizeof(*vhost->login_buf), | |
4531 | vhost->login_buf, vhost->login_buf_dma); | |
4532 | free_sg_pool: | |
4533 | dma_pool_destroy(vhost->sg_pool); | |
4534 | unmap_async_crq: | |
4535 | dma_unmap_single(dev, async_q->msg_token, | |
4536 | async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); | |
4537 | free_async_crq: | |
4538 | free_page((unsigned long)async_q->msgs); | |
4539 | nomem: | |
4540 | LEAVE; | |
4541 | return -ENOMEM; | |
4542 | } | |
4543 | ||
43c8da90 BK |
4544 | /** |
4545 | * ibmvfc_rport_add_thread - Worker thread for rport adds | |
4546 | * @work: work struct | |
4547 | * | |
4548 | **/ | |
4549 | static void ibmvfc_rport_add_thread(struct work_struct *work) | |
4550 | { | |
4551 | struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, | |
4552 | rport_add_work_q); | |
4553 | struct ibmvfc_target *tgt; | |
4554 | struct fc_rport *rport; | |
4555 | unsigned long flags; | |
4556 | int did_work; | |
4557 | ||
4558 | ENTER; | |
4559 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4560 | do { | |
4561 | did_work = 0; | |
4562 | if (vhost->state != IBMVFC_ACTIVE) | |
4563 | break; | |
4564 | ||
4565 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
4566 | if (tgt->add_rport) { | |
4567 | did_work = 1; | |
4568 | tgt->add_rport = 0; | |
4569 | kref_get(&tgt->kref); | |
4570 | rport = tgt->rport; | |
4571 | if (!rport) { | |
4572 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4573 | ibmvfc_tgt_add_rport(tgt); | |
4574 | } else if (get_device(&rport->dev)) { | |
4575 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4576 | tgt_dbg(tgt, "Setting rport roles\n"); | |
4577 | fc_remote_port_rolechg(rport, tgt->ids.roles); | |
4578 | put_device(&rport->dev); | |
4579 | } | |
4580 | ||
4581 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4582 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4583 | break; | |
4584 | } | |
4585 | } | |
4586 | } while(did_work); | |
4587 | ||
4588 | if (vhost->state == IBMVFC_ACTIVE) | |
4589 | vhost->scan_complete = 1; | |
4590 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4591 | LEAVE; | |
4592 | } | |
4593 | ||
072b91f9 BK |
4594 | /** |
4595 | * ibmvfc_probe - Adapter hot plug add entry point | |
4596 | * @vdev: vio device struct | |
4597 | * @id: vio device id struct | |
4598 | * | |
4599 | * Return value: | |
4600 | * 0 on success / non-zero on failure | |
4601 | **/ | |
4602 | static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) | |
4603 | { | |
4604 | struct ibmvfc_host *vhost; | |
4605 | struct Scsi_Host *shost; | |
4606 | struct device *dev = &vdev->dev; | |
4607 | int rc = -ENOMEM; | |
4608 | ||
4609 | ENTER; | |
4610 | shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); | |
4611 | if (!shost) { | |
4612 | dev_err(dev, "Couldn't allocate host data\n"); | |
4613 | goto out; | |
4614 | } | |
4615 | ||
4616 | shost->transportt = ibmvfc_transport_template; | |
4617 | shost->can_queue = max_requests; | |
4618 | shost->max_lun = max_lun; | |
4619 | shost->max_id = max_targets; | |
4620 | shost->max_sectors = IBMVFC_MAX_SECTORS; | |
4621 | shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; | |
4622 | shost->unique_id = shost->host_no; | |
4623 | ||
4624 | vhost = shost_priv(shost); | |
4625 | INIT_LIST_HEAD(&vhost->sent); | |
4626 | INIT_LIST_HEAD(&vhost->free); | |
4627 | INIT_LIST_HEAD(&vhost->targets); | |
4628 | sprintf(vhost->name, IBMVFC_NAME); | |
4629 | vhost->host = shost; | |
4630 | vhost->dev = dev; | |
4631 | vhost->partition_number = -1; | |
4632 | vhost->log_level = log_level; | |
10501e1c | 4633 | vhost->task_set = 1; |
072b91f9 BK |
4634 | strcpy(vhost->partition_name, "UNKNOWN"); |
4635 | init_waitqueue_head(&vhost->work_wait_q); | |
4636 | init_waitqueue_head(&vhost->init_wait_q); | |
43c8da90 | 4637 | INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); |
d31429e1 | 4638 | mutex_init(&vhost->passthru_mutex); |
072b91f9 BK |
4639 | |
4640 | if ((rc = ibmvfc_alloc_mem(vhost))) | |
4641 | goto free_scsi_host; | |
4642 | ||
4643 | vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, | |
4644 | shost->host_no); | |
4645 | ||
4646 | if (IS_ERR(vhost->work_thread)) { | |
4647 | dev_err(dev, "Couldn't create kernel thread: %ld\n", | |
4648 | PTR_ERR(vhost->work_thread)); | |
4649 | goto free_host_mem; | |
4650 | } | |
4651 | ||
4652 | if ((rc = ibmvfc_init_crq(vhost))) { | |
4653 | dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); | |
4654 | goto kill_kthread; | |
4655 | } | |
4656 | ||
4657 | if ((rc = ibmvfc_init_event_pool(vhost))) { | |
4658 | dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); | |
4659 | goto release_crq; | |
4660 | } | |
4661 | ||
4662 | if ((rc = scsi_add_host(shost, dev))) | |
4663 | goto release_event_pool; | |
4664 | ||
4665 | if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, | |
4666 | &ibmvfc_trace_attr))) { | |
4667 | dev_err(dev, "Failed to create trace file. rc=%d\n", rc); | |
4668 | goto remove_shost; | |
4669 | } | |
4670 | ||
d31429e1 BK |
4671 | if (shost_to_fc_host(shost)->rqst_q) |
4672 | blk_queue_max_hw_segments(shost_to_fc_host(shost)->rqst_q, 1); | |
072b91f9 BK |
4673 | dev_set_drvdata(dev, vhost); |
4674 | spin_lock(&ibmvfc_driver_lock); | |
4675 | list_add_tail(&vhost->queue, &ibmvfc_head); | |
4676 | spin_unlock(&ibmvfc_driver_lock); | |
4677 | ||
4678 | ibmvfc_send_crq_init(vhost); | |
4679 | scsi_scan_host(shost); | |
4680 | return 0; | |
4681 | ||
4682 | remove_shost: | |
4683 | scsi_remove_host(shost); | |
4684 | release_event_pool: | |
4685 | ibmvfc_free_event_pool(vhost); | |
4686 | release_crq: | |
4687 | ibmvfc_release_crq_queue(vhost); | |
4688 | kill_kthread: | |
4689 | kthread_stop(vhost->work_thread); | |
4690 | free_host_mem: | |
4691 | ibmvfc_free_mem(vhost); | |
4692 | free_scsi_host: | |
4693 | scsi_host_put(shost); | |
4694 | out: | |
4695 | LEAVE; | |
4696 | return rc; | |
4697 | } | |
4698 | ||
4699 | /** | |
4700 | * ibmvfc_remove - Adapter hot plug remove entry point | |
4701 | * @vdev: vio device struct | |
4702 | * | |
4703 | * Return value: | |
4704 | * 0 | |
4705 | **/ | |
4706 | static int ibmvfc_remove(struct vio_dev *vdev) | |
4707 | { | |
4708 | struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); | |
4709 | unsigned long flags; | |
4710 | ||
4711 | ENTER; | |
4712 | ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); | |
70431105 BK |
4713 | |
4714 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2d0da2a4 | 4715 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
70431105 BK |
4716 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
4717 | ||
2d0da2a4 BK |
4718 | ibmvfc_wait_while_resetting(vhost); |
4719 | ibmvfc_release_crq_queue(vhost); | |
072b91f9 BK |
4720 | kthread_stop(vhost->work_thread); |
4721 | fc_remove_host(vhost->host); | |
4722 | scsi_remove_host(vhost->host); | |
072b91f9 BK |
4723 | |
4724 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4725 | ibmvfc_purge_requests(vhost, DID_ERROR); | |
4726 | ibmvfc_free_event_pool(vhost); | |
4727 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4728 | ||
4729 | ibmvfc_free_mem(vhost); | |
4730 | spin_lock(&ibmvfc_driver_lock); | |
4731 | list_del(&vhost->queue); | |
4732 | spin_unlock(&ibmvfc_driver_lock); | |
4733 | scsi_host_put(vhost->host); | |
4734 | LEAVE; | |
4735 | return 0; | |
4736 | } | |
4737 | ||
39c1ffec BK |
4738 | /** |
4739 | * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver | |
4740 | * @vdev: vio device struct | |
4741 | * | |
4742 | * Return value: | |
4743 | * Number of bytes the driver will need to DMA map at the same time in | |
4744 | * order to perform well. | |
4745 | */ | |
4746 | static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) | |
4747 | { | |
4748 | unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); | |
4749 | return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); | |
4750 | } | |
4751 | ||
072b91f9 BK |
4752 | static struct vio_device_id ibmvfc_device_table[] __devinitdata = { |
4753 | {"fcp", "IBM,vfc-client"}, | |
4754 | { "", "" } | |
4755 | }; | |
4756 | MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); | |
4757 | ||
4758 | static struct vio_driver ibmvfc_driver = { | |
4759 | .id_table = ibmvfc_device_table, | |
4760 | .probe = ibmvfc_probe, | |
4761 | .remove = ibmvfc_remove, | |
39c1ffec | 4762 | .get_desired_dma = ibmvfc_get_desired_dma, |
072b91f9 BK |
4763 | .driver = { |
4764 | .name = IBMVFC_NAME, | |
4765 | .owner = THIS_MODULE, | |
4766 | } | |
4767 | }; | |
4768 | ||
4769 | static struct fc_function_template ibmvfc_transport_functions = { | |
4770 | .show_host_fabric_name = 1, | |
4771 | .show_host_node_name = 1, | |
4772 | .show_host_port_name = 1, | |
4773 | .show_host_supported_classes = 1, | |
4774 | .show_host_port_type = 1, | |
4775 | .show_host_port_id = 1, | |
9ab3610f | 4776 | .show_host_maxframe_size = 1, |
072b91f9 BK |
4777 | |
4778 | .get_host_port_state = ibmvfc_get_host_port_state, | |
4779 | .show_host_port_state = 1, | |
4780 | ||
4781 | .get_host_speed = ibmvfc_get_host_speed, | |
4782 | .show_host_speed = 1, | |
4783 | ||
4784 | .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, | |
4785 | .terminate_rport_io = ibmvfc_terminate_rport_io, | |
4786 | ||
4787 | .show_rport_maxframe_size = 1, | |
4788 | .show_rport_supported_classes = 1, | |
4789 | ||
4790 | .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, | |
4791 | .show_rport_dev_loss_tmo = 1, | |
4792 | ||
4793 | .get_starget_node_name = ibmvfc_get_starget_node_name, | |
4794 | .show_starget_node_name = 1, | |
4795 | ||
4796 | .get_starget_port_name = ibmvfc_get_starget_port_name, | |
4797 | .show_starget_port_name = 1, | |
4798 | ||
4799 | .get_starget_port_id = ibmvfc_get_starget_port_id, | |
4800 | .show_starget_port_id = 1, | |
d31429e1 BK |
4801 | |
4802 | .bsg_request = ibmvfc_bsg_request, | |
4803 | .bsg_timeout = ibmvfc_bsg_timeout, | |
072b91f9 BK |
4804 | }; |
4805 | ||
4806 | /** | |
4807 | * ibmvfc_module_init - Initialize the ibmvfc module | |
4808 | * | |
4809 | * Return value: | |
4810 | * 0 on success / other on failure | |
4811 | **/ | |
4812 | static int __init ibmvfc_module_init(void) | |
4813 | { | |
4814 | int rc; | |
4815 | ||
4816 | if (!firmware_has_feature(FW_FEATURE_VIO)) | |
4817 | return -ENODEV; | |
4818 | ||
4819 | printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", | |
4820 | IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); | |
4821 | ||
4822 | ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); | |
4823 | if (!ibmvfc_transport_template) | |
4824 | return -ENOMEM; | |
4825 | ||
4826 | rc = vio_register_driver(&ibmvfc_driver); | |
4827 | if (rc) | |
4828 | fc_release_transport(ibmvfc_transport_template); | |
4829 | return rc; | |
4830 | } | |
4831 | ||
4832 | /** | |
4833 | * ibmvfc_module_exit - Teardown the ibmvfc module | |
4834 | * | |
4835 | * Return value: | |
4836 | * nothing | |
4837 | **/ | |
4838 | static void __exit ibmvfc_module_exit(void) | |
4839 | { | |
4840 | vio_unregister_driver(&ibmvfc_driver); | |
4841 | fc_release_transport(ibmvfc_transport_template); | |
4842 | } | |
4843 | ||
4844 | module_init(ibmvfc_module_init); | |
4845 | module_exit(ibmvfc_module_exit); |