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072b91f9 BK |
1 | /* |
2 | * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter | |
3 | * | |
4 | * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation | |
5 | * | |
6 | * Copyright (C) IBM Corporation, 2008 | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | */ | |
23 | ||
24 | #include <linux/module.h> | |
25 | #include <linux/moduleparam.h> | |
26 | #include <linux/dma-mapping.h> | |
27 | #include <linux/dmapool.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/interrupt.h> | |
30 | #include <linux/kthread.h> | |
31 | #include <linux/of.h> | |
32 | #include <linux/stringify.h> | |
33 | #include <asm/firmware.h> | |
34 | #include <asm/irq.h> | |
35 | #include <asm/vio.h> | |
36 | #include <scsi/scsi.h> | |
37 | #include <scsi/scsi_cmnd.h> | |
38 | #include <scsi/scsi_host.h> | |
39 | #include <scsi/scsi_device.h> | |
40 | #include <scsi/scsi_tcq.h> | |
41 | #include <scsi/scsi_transport_fc.h> | |
42 | #include "ibmvfc.h" | |
43 | ||
44 | static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; | |
45 | static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; | |
46 | static unsigned int max_lun = IBMVFC_MAX_LUN; | |
47 | static unsigned int max_targets = IBMVFC_MAX_TARGETS; | |
48 | static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; | |
49 | static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; | |
50 | static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO; | |
51 | static unsigned int ibmvfc_debug = IBMVFC_DEBUG; | |
52 | static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; | |
53 | static LIST_HEAD(ibmvfc_head); | |
54 | static DEFINE_SPINLOCK(ibmvfc_driver_lock); | |
55 | static struct scsi_transport_template *ibmvfc_transport_template; | |
56 | ||
57 | MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); | |
58 | MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); | |
59 | MODULE_LICENSE("GPL"); | |
60 | MODULE_VERSION(IBMVFC_DRIVER_VERSION); | |
61 | ||
62 | module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); | |
63 | MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " | |
64 | "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); | |
65 | module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); | |
66 | MODULE_PARM_DESC(default_timeout, | |
67 | "Default timeout in seconds for initialization and EH commands. " | |
68 | "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); | |
69 | module_param_named(max_requests, max_requests, uint, S_IRUGO); | |
70 | MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " | |
71 | "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); | |
72 | module_param_named(max_lun, max_lun, uint, S_IRUGO); | |
73 | MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " | |
74 | "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); | |
75 | module_param_named(max_targets, max_targets, uint, S_IRUGO); | |
76 | MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " | |
77 | "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); | |
545ef9a2 | 78 | module_param_named(disc_threads, disc_threads, uint, S_IRUGO); |
072b91f9 BK |
79 | MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " |
80 | "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); | |
81 | module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); | |
82 | MODULE_PARM_DESC(debug, "Enable driver debug information. " | |
83 | "[Default=" __stringify(IBMVFC_DEBUG) "]"); | |
84 | module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR); | |
85 | MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC " | |
86 | "transport should insulate the loss of a remote port. Once this " | |
87 | "value is exceeded, the scsi target is removed. " | |
88 | "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]"); | |
89 | module_param_named(log_level, log_level, uint, 0); | |
90 | MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " | |
91 | "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); | |
92 | ||
93 | static const struct { | |
94 | u16 status; | |
95 | u16 error; | |
96 | u8 result; | |
97 | u8 retry; | |
98 | int log; | |
99 | char *name; | |
100 | } cmd_status [] = { | |
101 | { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, | |
102 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, | |
103 | { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, | |
752b3232 | 104 | { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, |
072b91f9 BK |
105 | { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, |
106 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, | |
107 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, | |
108 | { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, | |
109 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, | |
110 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, | |
111 | { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, | |
112 | { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, | |
113 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 0, 0, "link halted" }, | |
114 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, | |
115 | ||
116 | { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, | |
117 | { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, | |
752b3232 BK |
118 | { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, |
119 | { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, | |
072b91f9 | 120 | { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, |
752b3232 BK |
121 | { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, |
122 | { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, | |
072b91f9 | 123 | { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, |
646d3857 | 124 | { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, |
072b91f9 BK |
125 | { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, |
126 | ||
127 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, | |
128 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, | |
129 | { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, | |
130 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, | |
131 | { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, | |
132 | { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, | |
133 | { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, | |
134 | { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, | |
135 | { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, | |
136 | { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, | |
137 | { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, | |
138 | ||
139 | { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, | |
140 | }; | |
141 | ||
142 | static void ibmvfc_npiv_login(struct ibmvfc_host *); | |
143 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); | |
144 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); | |
145 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *); | |
146 | ||
147 | static const char *unknown_error = "unknown error"; | |
148 | ||
149 | #ifdef CONFIG_SCSI_IBMVFC_TRACE | |
150 | /** | |
151 | * ibmvfc_trc_start - Log a start trace entry | |
152 | * @evt: ibmvfc event struct | |
153 | * | |
154 | **/ | |
155 | static void ibmvfc_trc_start(struct ibmvfc_event *evt) | |
156 | { | |
157 | struct ibmvfc_host *vhost = evt->vhost; | |
158 | struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; | |
159 | struct ibmvfc_mad_common *mad = &evt->iu.mad_common; | |
160 | struct ibmvfc_trace_entry *entry; | |
161 | ||
162 | entry = &vhost->trace[vhost->trace_index++]; | |
163 | entry->evt = evt; | |
164 | entry->time = jiffies; | |
165 | entry->fmt = evt->crq.format; | |
166 | entry->type = IBMVFC_TRC_START; | |
167 | ||
168 | switch (entry->fmt) { | |
169 | case IBMVFC_CMD_FORMAT: | |
170 | entry->op_code = vfc_cmd->iu.cdb[0]; | |
171 | entry->scsi_id = vfc_cmd->tgt_scsi_id; | |
172 | entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); | |
173 | entry->tmf_flags = vfc_cmd->iu.tmf_flags; | |
174 | entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; | |
175 | break; | |
176 | case IBMVFC_MAD_FORMAT: | |
177 | entry->op_code = mad->opcode; | |
178 | break; | |
179 | default: | |
180 | break; | |
181 | }; | |
182 | } | |
183 | ||
184 | /** | |
185 | * ibmvfc_trc_end - Log an end trace entry | |
186 | * @evt: ibmvfc event struct | |
187 | * | |
188 | **/ | |
189 | static void ibmvfc_trc_end(struct ibmvfc_event *evt) | |
190 | { | |
191 | struct ibmvfc_host *vhost = evt->vhost; | |
192 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
193 | struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; | |
194 | struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; | |
195 | ||
196 | entry->evt = evt; | |
197 | entry->time = jiffies; | |
198 | entry->fmt = evt->crq.format; | |
199 | entry->type = IBMVFC_TRC_END; | |
200 | ||
201 | switch (entry->fmt) { | |
202 | case IBMVFC_CMD_FORMAT: | |
203 | entry->op_code = vfc_cmd->iu.cdb[0]; | |
204 | entry->scsi_id = vfc_cmd->tgt_scsi_id; | |
205 | entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); | |
206 | entry->tmf_flags = vfc_cmd->iu.tmf_flags; | |
207 | entry->u.end.status = vfc_cmd->status; | |
208 | entry->u.end.error = vfc_cmd->error; | |
209 | entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; | |
210 | entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; | |
211 | entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; | |
212 | break; | |
213 | case IBMVFC_MAD_FORMAT: | |
214 | entry->op_code = mad->opcode; | |
215 | entry->u.end.status = mad->status; | |
216 | break; | |
217 | default: | |
218 | break; | |
219 | ||
220 | }; | |
221 | } | |
222 | ||
223 | #else | |
224 | #define ibmvfc_trc_start(evt) do { } while (0) | |
225 | #define ibmvfc_trc_end(evt) do { } while (0) | |
226 | #endif | |
227 | ||
228 | /** | |
229 | * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response | |
230 | * @status: status / error class | |
231 | * @error: error | |
232 | * | |
233 | * Return value: | |
234 | * index into cmd_status / -EINVAL on failure | |
235 | **/ | |
236 | static int ibmvfc_get_err_index(u16 status, u16 error) | |
237 | { | |
238 | int i; | |
239 | ||
240 | for (i = 0; i < ARRAY_SIZE(cmd_status); i++) | |
241 | if ((cmd_status[i].status & status) == cmd_status[i].status && | |
242 | cmd_status[i].error == error) | |
243 | return i; | |
244 | ||
245 | return -EINVAL; | |
246 | } | |
247 | ||
248 | /** | |
249 | * ibmvfc_get_cmd_error - Find the error description for the fcp response | |
250 | * @status: status / error class | |
251 | * @error: error | |
252 | * | |
253 | * Return value: | |
254 | * error description string | |
255 | **/ | |
256 | static const char *ibmvfc_get_cmd_error(u16 status, u16 error) | |
257 | { | |
258 | int rc = ibmvfc_get_err_index(status, error); | |
259 | if (rc >= 0) | |
260 | return cmd_status[rc].name; | |
261 | return unknown_error; | |
262 | } | |
263 | ||
264 | /** | |
265 | * ibmvfc_get_err_result - Find the scsi status to return for the fcp response | |
266 | * @vfc_cmd: ibmvfc command struct | |
267 | * | |
268 | * Return value: | |
269 | * SCSI result value to return for completed command | |
270 | **/ | |
271 | static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) | |
272 | { | |
273 | int err; | |
274 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; | |
275 | int fc_rsp_len = rsp->fcp_rsp_len; | |
276 | ||
277 | if ((rsp->flags & FCP_RSP_LEN_VALID) && | |
4a2837d4 | 278 | ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || |
072b91f9 BK |
279 | rsp->data.info.rsp_code)) |
280 | return DID_ERROR << 16; | |
281 | ||
072b91f9 BK |
282 | err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); |
283 | if (err >= 0) | |
284 | return rsp->scsi_status | (cmd_status[err].result << 16); | |
285 | return rsp->scsi_status | (DID_ERROR << 16); | |
286 | } | |
287 | ||
288 | /** | |
289 | * ibmvfc_retry_cmd - Determine if error status is retryable | |
290 | * @status: status / error class | |
291 | * @error: error | |
292 | * | |
293 | * Return value: | |
294 | * 1 if error should be retried / 0 if it should not | |
295 | **/ | |
296 | static int ibmvfc_retry_cmd(u16 status, u16 error) | |
297 | { | |
298 | int rc = ibmvfc_get_err_index(status, error); | |
299 | ||
300 | if (rc >= 0) | |
301 | return cmd_status[rc].retry; | |
302 | return 1; | |
303 | } | |
304 | ||
305 | static const char *unknown_fc_explain = "unknown fc explain"; | |
306 | ||
307 | static const struct { | |
308 | u16 fc_explain; | |
309 | char *name; | |
310 | } ls_explain [] = { | |
311 | { 0x00, "no additional explanation" }, | |
312 | { 0x01, "service parameter error - options" }, | |
313 | { 0x03, "service parameter error - initiator control" }, | |
314 | { 0x05, "service parameter error - recipient control" }, | |
315 | { 0x07, "service parameter error - received data field size" }, | |
316 | { 0x09, "service parameter error - concurrent seq" }, | |
317 | { 0x0B, "service parameter error - credit" }, | |
318 | { 0x0D, "invalid N_Port/F_Port_Name" }, | |
319 | { 0x0E, "invalid node/Fabric Name" }, | |
320 | { 0x0F, "invalid common service parameters" }, | |
321 | { 0x11, "invalid association header" }, | |
322 | { 0x13, "association header required" }, | |
323 | { 0x15, "invalid originator S_ID" }, | |
324 | { 0x17, "invalid OX_ID-RX-ID combination" }, | |
325 | { 0x19, "command (request) already in progress" }, | |
326 | { 0x1E, "N_Port Login requested" }, | |
327 | { 0x1F, "Invalid N_Port_ID" }, | |
328 | }; | |
329 | ||
330 | static const struct { | |
331 | u16 fc_explain; | |
332 | char *name; | |
333 | } gs_explain [] = { | |
334 | { 0x00, "no additional explanation" }, | |
335 | { 0x01, "port identifier not registered" }, | |
336 | { 0x02, "port name not registered" }, | |
337 | { 0x03, "node name not registered" }, | |
338 | { 0x04, "class of service not registered" }, | |
339 | { 0x06, "initial process associator not registered" }, | |
340 | { 0x07, "FC-4 TYPEs not registered" }, | |
341 | { 0x08, "symbolic port name not registered" }, | |
342 | { 0x09, "symbolic node name not registered" }, | |
343 | { 0x0A, "port type not registered" }, | |
344 | { 0xF0, "authorization exception" }, | |
345 | { 0xF1, "authentication exception" }, | |
346 | { 0xF2, "data base full" }, | |
347 | { 0xF3, "data base empty" }, | |
348 | { 0xF4, "processing request" }, | |
349 | { 0xF5, "unable to verify connection" }, | |
350 | { 0xF6, "devices not in a common zone" }, | |
351 | }; | |
352 | ||
353 | /** | |
354 | * ibmvfc_get_ls_explain - Return the FC Explain description text | |
355 | * @status: FC Explain status | |
356 | * | |
357 | * Returns: | |
358 | * error string | |
359 | **/ | |
360 | static const char *ibmvfc_get_ls_explain(u16 status) | |
361 | { | |
362 | int i; | |
363 | ||
364 | for (i = 0; i < ARRAY_SIZE(ls_explain); i++) | |
365 | if (ls_explain[i].fc_explain == status) | |
366 | return ls_explain[i].name; | |
367 | ||
368 | return unknown_fc_explain; | |
369 | } | |
370 | ||
371 | /** | |
372 | * ibmvfc_get_gs_explain - Return the FC Explain description text | |
373 | * @status: FC Explain status | |
374 | * | |
375 | * Returns: | |
376 | * error string | |
377 | **/ | |
378 | static const char *ibmvfc_get_gs_explain(u16 status) | |
379 | { | |
380 | int i; | |
381 | ||
382 | for (i = 0; i < ARRAY_SIZE(gs_explain); i++) | |
383 | if (gs_explain[i].fc_explain == status) | |
384 | return gs_explain[i].name; | |
385 | ||
386 | return unknown_fc_explain; | |
387 | } | |
388 | ||
389 | static const struct { | |
390 | enum ibmvfc_fc_type fc_type; | |
391 | char *name; | |
392 | } fc_type [] = { | |
393 | { IBMVFC_FABRIC_REJECT, "fabric reject" }, | |
394 | { IBMVFC_PORT_REJECT, "port reject" }, | |
395 | { IBMVFC_LS_REJECT, "ELS reject" }, | |
396 | { IBMVFC_FABRIC_BUSY, "fabric busy" }, | |
397 | { IBMVFC_PORT_BUSY, "port busy" }, | |
398 | { IBMVFC_BASIC_REJECT, "basic reject" }, | |
399 | }; | |
400 | ||
401 | static const char *unknown_fc_type = "unknown fc type"; | |
402 | ||
403 | /** | |
404 | * ibmvfc_get_fc_type - Return the FC Type description text | |
405 | * @status: FC Type error status | |
406 | * | |
407 | * Returns: | |
408 | * error string | |
409 | **/ | |
410 | static const char *ibmvfc_get_fc_type(u16 status) | |
411 | { | |
412 | int i; | |
413 | ||
414 | for (i = 0; i < ARRAY_SIZE(fc_type); i++) | |
415 | if (fc_type[i].fc_type == status) | |
416 | return fc_type[i].name; | |
417 | ||
418 | return unknown_fc_type; | |
419 | } | |
420 | ||
421 | /** | |
422 | * ibmvfc_set_tgt_action - Set the next init action for the target | |
423 | * @tgt: ibmvfc target struct | |
424 | * @action: action to perform | |
425 | * | |
426 | **/ | |
427 | static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, | |
428 | enum ibmvfc_target_action action) | |
429 | { | |
430 | switch (tgt->action) { | |
431 | case IBMVFC_TGT_ACTION_DEL_RPORT: | |
432 | break; | |
433 | default: | |
43c8da90 BK |
434 | if (action == IBMVFC_TGT_ACTION_DEL_RPORT) |
435 | tgt->add_rport = 0; | |
072b91f9 BK |
436 | tgt->action = action; |
437 | break; | |
438 | } | |
439 | } | |
440 | ||
441 | /** | |
442 | * ibmvfc_set_host_state - Set the state for the host | |
443 | * @vhost: ibmvfc host struct | |
444 | * @state: state to set host to | |
445 | * | |
446 | * Returns: | |
447 | * 0 if state changed / non-zero if not changed | |
448 | **/ | |
449 | static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, | |
450 | enum ibmvfc_host_state state) | |
451 | { | |
452 | int rc = 0; | |
453 | ||
454 | switch (vhost->state) { | |
455 | case IBMVFC_HOST_OFFLINE: | |
456 | rc = -EINVAL; | |
457 | break; | |
458 | default: | |
459 | vhost->state = state; | |
460 | break; | |
461 | }; | |
462 | ||
463 | return rc; | |
464 | } | |
465 | ||
466 | /** | |
467 | * ibmvfc_set_host_action - Set the next init action for the host | |
468 | * @vhost: ibmvfc host struct | |
469 | * @action: action to perform | |
470 | * | |
471 | **/ | |
472 | static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, | |
473 | enum ibmvfc_host_action action) | |
474 | { | |
475 | switch (action) { | |
476 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: | |
477 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) | |
478 | vhost->action = action; | |
479 | break; | |
480 | case IBMVFC_HOST_ACTION_INIT_WAIT: | |
481 | if (vhost->action == IBMVFC_HOST_ACTION_INIT) | |
482 | vhost->action = action; | |
483 | break; | |
484 | case IBMVFC_HOST_ACTION_QUERY: | |
485 | switch (vhost->action) { | |
486 | case IBMVFC_HOST_ACTION_INIT_WAIT: | |
487 | case IBMVFC_HOST_ACTION_NONE: | |
43c8da90 | 488 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 BK |
489 | vhost->action = action; |
490 | break; | |
491 | default: | |
492 | break; | |
493 | }; | |
494 | break; | |
495 | case IBMVFC_HOST_ACTION_TGT_INIT: | |
496 | if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) | |
497 | vhost->action = action; | |
498 | break; | |
499 | case IBMVFC_HOST_ACTION_INIT: | |
500 | case IBMVFC_HOST_ACTION_TGT_DEL: | |
501 | case IBMVFC_HOST_ACTION_QUERY_TGTS: | |
10e79499 | 502 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 BK |
503 | case IBMVFC_HOST_ACTION_NONE: |
504 | default: | |
505 | vhost->action = action; | |
506 | break; | |
507 | }; | |
508 | } | |
509 | ||
510 | /** | |
511 | * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) | |
512 | * @vhost: ibmvfc host struct | |
513 | * | |
514 | * Return value: | |
515 | * nothing | |
516 | **/ | |
517 | static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) | |
518 | { | |
519 | if (vhost->action == IBMVFC_HOST_ACTION_NONE) { | |
2d0da2a4 BK |
520 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
521 | scsi_block_requests(vhost->host); | |
522 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); | |
523 | } | |
072b91f9 BK |
524 | } else |
525 | vhost->reinit = 1; | |
526 | ||
527 | wake_up(&vhost->work_wait_q); | |
528 | } | |
529 | ||
530 | /** | |
531 | * ibmvfc_link_down - Handle a link down event from the adapter | |
532 | * @vhost: ibmvfc host struct | |
533 | * @state: ibmvfc host state to enter | |
534 | * | |
535 | **/ | |
536 | static void ibmvfc_link_down(struct ibmvfc_host *vhost, | |
537 | enum ibmvfc_host_state state) | |
538 | { | |
539 | struct ibmvfc_target *tgt; | |
540 | ||
541 | ENTER; | |
542 | scsi_block_requests(vhost->host); | |
543 | list_for_each_entry(tgt, &vhost->targets, queue) | |
544 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
545 | ibmvfc_set_host_state(vhost, state); | |
546 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); | |
547 | vhost->events_to_log |= IBMVFC_AE_LINKDOWN; | |
548 | wake_up(&vhost->work_wait_q); | |
549 | LEAVE; | |
550 | } | |
551 | ||
552 | /** | |
553 | * ibmvfc_init_host - Start host initialization | |
554 | * @vhost: ibmvfc host struct | |
cf6f10d7 | 555 | * @relogin: is this a re-login? |
072b91f9 BK |
556 | * |
557 | * Return value: | |
558 | * nothing | |
559 | **/ | |
cf6f10d7 | 560 | static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin) |
072b91f9 BK |
561 | { |
562 | struct ibmvfc_target *tgt; | |
563 | ||
564 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { | |
1c41fa82 | 565 | if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { |
072b91f9 BK |
566 | dev_err(vhost->dev, |
567 | "Host initialization retries exceeded. Taking adapter offline\n"); | |
568 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); | |
569 | return; | |
570 | } | |
571 | } | |
572 | ||
573 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { | |
cf6f10d7 BK |
574 | if (!relogin) { |
575 | memset(vhost->async_crq.msgs, 0, PAGE_SIZE); | |
576 | vhost->async_crq.cur = 0; | |
577 | } | |
578 | ||
072b91f9 BK |
579 | list_for_each_entry(tgt, &vhost->targets, queue) |
580 | tgt->need_login = 1; | |
581 | scsi_block_requests(vhost->host); | |
582 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); | |
583 | vhost->job_step = ibmvfc_npiv_login; | |
584 | wake_up(&vhost->work_wait_q); | |
585 | } | |
586 | } | |
587 | ||
588 | /** | |
589 | * ibmvfc_send_crq - Send a CRQ | |
590 | * @vhost: ibmvfc host struct | |
591 | * @word1: the first 64 bits of the data | |
592 | * @word2: the second 64 bits of the data | |
593 | * | |
594 | * Return value: | |
595 | * 0 on success / other on failure | |
596 | **/ | |
597 | static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) | |
598 | { | |
599 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
600 | return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); | |
601 | } | |
602 | ||
603 | /** | |
604 | * ibmvfc_send_crq_init - Send a CRQ init message | |
605 | * @vhost: ibmvfc host struct | |
606 | * | |
607 | * Return value: | |
608 | * 0 on success / other on failure | |
609 | **/ | |
610 | static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) | |
611 | { | |
612 | ibmvfc_dbg(vhost, "Sending CRQ init\n"); | |
613 | return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); | |
614 | } | |
615 | ||
616 | /** | |
617 | * ibmvfc_send_crq_init_complete - Send a CRQ init complete message | |
618 | * @vhost: ibmvfc host struct | |
619 | * | |
620 | * Return value: | |
621 | * 0 on success / other on failure | |
622 | **/ | |
623 | static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) | |
624 | { | |
625 | ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); | |
626 | return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); | |
627 | } | |
628 | ||
629 | /** | |
630 | * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ | |
631 | * @vhost: ibmvfc host struct | |
632 | * | |
633 | * Frees irq, deallocates a page for messages, unmaps dma, and unregisters | |
634 | * the crq with the hypervisor. | |
635 | **/ | |
636 | static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) | |
637 | { | |
638 | long rc; | |
639 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
640 | struct ibmvfc_crq_queue *crq = &vhost->crq; | |
641 | ||
642 | ibmvfc_dbg(vhost, "Releasing CRQ\n"); | |
643 | free_irq(vdev->irq, vhost); | |
039a0898 | 644 | tasklet_kill(&vhost->tasklet); |
072b91f9 BK |
645 | do { |
646 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); | |
647 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
648 | ||
649 | vhost->state = IBMVFC_NO_CRQ; | |
650 | dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); | |
651 | free_page((unsigned long)crq->msgs); | |
652 | } | |
653 | ||
654 | /** | |
655 | * ibmvfc_reenable_crq_queue - reenables the CRQ | |
656 | * @vhost: ibmvfc host struct | |
657 | * | |
658 | * Return value: | |
659 | * 0 on success / other on failure | |
660 | **/ | |
661 | static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) | |
662 | { | |
663 | int rc; | |
664 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
665 | ||
666 | /* Re-enable the CRQ */ | |
667 | do { | |
668 | rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); | |
669 | } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
670 | ||
671 | if (rc) | |
672 | dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); | |
673 | ||
674 | return rc; | |
675 | } | |
676 | ||
677 | /** | |
678 | * ibmvfc_reset_crq - resets a crq after a failure | |
679 | * @vhost: ibmvfc host struct | |
680 | * | |
681 | * Return value: | |
682 | * 0 on success / other on failure | |
683 | **/ | |
684 | static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) | |
685 | { | |
686 | int rc; | |
687 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
688 | struct ibmvfc_crq_queue *crq = &vhost->crq; | |
689 | ||
690 | /* Close the CRQ */ | |
691 | do { | |
692 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); | |
693 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
694 | ||
695 | vhost->state = IBMVFC_NO_CRQ; | |
696 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); | |
697 | ||
698 | /* Clean out the queue */ | |
699 | memset(crq->msgs, 0, PAGE_SIZE); | |
700 | crq->cur = 0; | |
701 | ||
702 | /* And re-open it again */ | |
703 | rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, | |
704 | crq->msg_token, PAGE_SIZE); | |
705 | ||
706 | if (rc == H_CLOSED) | |
707 | /* Adapter is good, but other end is not ready */ | |
708 | dev_warn(vhost->dev, "Partner adapter not ready\n"); | |
709 | else if (rc != 0) | |
710 | dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); | |
711 | ||
712 | return rc; | |
713 | } | |
714 | ||
715 | /** | |
716 | * ibmvfc_valid_event - Determines if event is valid. | |
717 | * @pool: event_pool that contains the event | |
718 | * @evt: ibmvfc event to be checked for validity | |
719 | * | |
720 | * Return value: | |
721 | * 1 if event is valid / 0 if event is not valid | |
722 | **/ | |
723 | static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, | |
724 | struct ibmvfc_event *evt) | |
725 | { | |
726 | int index = evt - pool->events; | |
727 | if (index < 0 || index >= pool->size) /* outside of bounds */ | |
728 | return 0; | |
729 | if (evt != pool->events + index) /* unaligned */ | |
730 | return 0; | |
731 | return 1; | |
732 | } | |
733 | ||
734 | /** | |
735 | * ibmvfc_free_event - Free the specified event | |
736 | * @evt: ibmvfc_event to be freed | |
737 | * | |
738 | **/ | |
739 | static void ibmvfc_free_event(struct ibmvfc_event *evt) | |
740 | { | |
741 | struct ibmvfc_host *vhost = evt->vhost; | |
742 | struct ibmvfc_event_pool *pool = &vhost->pool; | |
743 | ||
744 | BUG_ON(!ibmvfc_valid_event(pool, evt)); | |
745 | BUG_ON(atomic_inc_return(&evt->free) != 1); | |
746 | list_add_tail(&evt->queue, &vhost->free); | |
747 | } | |
748 | ||
749 | /** | |
750 | * ibmvfc_scsi_eh_done - EH done function for queuecommand commands | |
751 | * @evt: ibmvfc event struct | |
752 | * | |
753 | * This function does not setup any error status, that must be done | |
754 | * before this function gets called. | |
755 | **/ | |
756 | static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) | |
757 | { | |
758 | struct scsi_cmnd *cmnd = evt->cmnd; | |
759 | ||
760 | if (cmnd) { | |
761 | scsi_dma_unmap(cmnd); | |
762 | cmnd->scsi_done(cmnd); | |
763 | } | |
764 | ||
ad8dcffa BK |
765 | if (evt->eh_comp) |
766 | complete(evt->eh_comp); | |
767 | ||
072b91f9 BK |
768 | ibmvfc_free_event(evt); |
769 | } | |
770 | ||
771 | /** | |
772 | * ibmvfc_fail_request - Fail request with specified error code | |
773 | * @evt: ibmvfc event struct | |
774 | * @error_code: error code to fail request with | |
775 | * | |
776 | * Return value: | |
777 | * none | |
778 | **/ | |
779 | static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) | |
780 | { | |
781 | if (evt->cmnd) { | |
782 | evt->cmnd->result = (error_code << 16); | |
783 | evt->done = ibmvfc_scsi_eh_done; | |
784 | } else | |
785 | evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; | |
786 | ||
787 | list_del(&evt->queue); | |
788 | del_timer(&evt->timer); | |
789 | ibmvfc_trc_end(evt); | |
790 | evt->done(evt); | |
791 | } | |
792 | ||
793 | /** | |
794 | * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests | |
795 | * @vhost: ibmvfc host struct | |
796 | * @error_code: error code to fail requests with | |
797 | * | |
798 | * Return value: | |
799 | * none | |
800 | **/ | |
801 | static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) | |
802 | { | |
803 | struct ibmvfc_event *evt, *pos; | |
804 | ||
805 | ibmvfc_dbg(vhost, "Purging all requests\n"); | |
806 | list_for_each_entry_safe(evt, pos, &vhost->sent, queue) | |
807 | ibmvfc_fail_request(evt, error_code); | |
808 | } | |
809 | ||
810 | /** | |
811 | * __ibmvfc_reset_host - Reset the connection to the server (no locking) | |
812 | * @vhost: struct ibmvfc host to reset | |
813 | **/ | |
814 | static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) | |
815 | { | |
816 | int rc; | |
817 | ||
818 | scsi_block_requests(vhost->host); | |
819 | ibmvfc_purge_requests(vhost, DID_ERROR); | |
820 | if ((rc = ibmvfc_reset_crq(vhost)) || | |
821 | (rc = ibmvfc_send_crq_init(vhost)) || | |
822 | (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { | |
823 | dev_err(vhost->dev, "Error after reset rc=%d\n", rc); | |
824 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
825 | } else | |
826 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
827 | } | |
828 | ||
829 | /** | |
830 | * ibmvfc_reset_host - Reset the connection to the server | |
831 | * @vhost: struct ibmvfc host to reset | |
832 | **/ | |
833 | static void ibmvfc_reset_host(struct ibmvfc_host *vhost) | |
834 | { | |
835 | unsigned long flags; | |
836 | ||
837 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
838 | __ibmvfc_reset_host(vhost); | |
839 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
840 | } | |
841 | ||
842 | /** | |
843 | * ibmvfc_retry_host_init - Retry host initialization if allowed | |
844 | * @vhost: ibmvfc host struct | |
845 | * | |
7d0e4622 BK |
846 | * Returns: 1 if init will be retried / 0 if not |
847 | * | |
072b91f9 | 848 | **/ |
7d0e4622 | 849 | static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) |
072b91f9 | 850 | { |
7d0e4622 BK |
851 | int retry = 0; |
852 | ||
072b91f9 | 853 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { |
1c41fa82 BK |
854 | vhost->delay_init = 1; |
855 | if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { | |
072b91f9 BK |
856 | dev_err(vhost->dev, |
857 | "Host initialization retries exceeded. Taking adapter offline\n"); | |
858 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); | |
1c41fa82 | 859 | } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) |
072b91f9 | 860 | __ibmvfc_reset_host(vhost); |
7d0e4622 | 861 | else { |
072b91f9 | 862 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
7d0e4622 BK |
863 | retry = 1; |
864 | } | |
072b91f9 BK |
865 | } |
866 | ||
867 | wake_up(&vhost->work_wait_q); | |
7d0e4622 | 868 | return retry; |
072b91f9 BK |
869 | } |
870 | ||
871 | /** | |
b3c10489 | 872 | * __ibmvfc_get_target - Find the specified scsi_target (no locking) |
072b91f9 BK |
873 | * @starget: scsi target struct |
874 | * | |
875 | * Return value: | |
876 | * ibmvfc_target struct / NULL if not found | |
877 | **/ | |
b3c10489 | 878 | static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) |
072b91f9 BK |
879 | { |
880 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
881 | struct ibmvfc_host *vhost = shost_priv(shost); | |
882 | struct ibmvfc_target *tgt; | |
883 | ||
884 | list_for_each_entry(tgt, &vhost->targets, queue) | |
b3c10489 BK |
885 | if (tgt->target_id == starget->id) { |
886 | kref_get(&tgt->kref); | |
072b91f9 | 887 | return tgt; |
b3c10489 | 888 | } |
072b91f9 BK |
889 | return NULL; |
890 | } | |
891 | ||
892 | /** | |
b3c10489 | 893 | * ibmvfc_get_target - Find the specified scsi_target |
072b91f9 BK |
894 | * @starget: scsi target struct |
895 | * | |
896 | * Return value: | |
897 | * ibmvfc_target struct / NULL if not found | |
898 | **/ | |
b3c10489 | 899 | static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) |
072b91f9 BK |
900 | { |
901 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
902 | struct ibmvfc_target *tgt; | |
903 | unsigned long flags; | |
904 | ||
905 | spin_lock_irqsave(shost->host_lock, flags); | |
b3c10489 | 906 | tgt = __ibmvfc_get_target(starget); |
072b91f9 BK |
907 | spin_unlock_irqrestore(shost->host_lock, flags); |
908 | return tgt; | |
909 | } | |
910 | ||
911 | /** | |
912 | * ibmvfc_get_host_speed - Get host port speed | |
913 | * @shost: scsi host struct | |
914 | * | |
915 | * Return value: | |
916 | * none | |
917 | **/ | |
918 | static void ibmvfc_get_host_speed(struct Scsi_Host *shost) | |
919 | { | |
920 | struct ibmvfc_host *vhost = shost_priv(shost); | |
921 | unsigned long flags; | |
922 | ||
923 | spin_lock_irqsave(shost->host_lock, flags); | |
924 | if (vhost->state == IBMVFC_ACTIVE) { | |
925 | switch (vhost->login_buf->resp.link_speed / 100) { | |
926 | case 1: | |
927 | fc_host_speed(shost) = FC_PORTSPEED_1GBIT; | |
928 | break; | |
929 | case 2: | |
930 | fc_host_speed(shost) = FC_PORTSPEED_2GBIT; | |
931 | break; | |
932 | case 4: | |
933 | fc_host_speed(shost) = FC_PORTSPEED_4GBIT; | |
934 | break; | |
935 | case 8: | |
936 | fc_host_speed(shost) = FC_PORTSPEED_8GBIT; | |
937 | break; | |
938 | case 10: | |
939 | fc_host_speed(shost) = FC_PORTSPEED_10GBIT; | |
940 | break; | |
941 | case 16: | |
942 | fc_host_speed(shost) = FC_PORTSPEED_16GBIT; | |
943 | break; | |
944 | default: | |
775a42ec | 945 | ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", |
072b91f9 BK |
946 | vhost->login_buf->resp.link_speed / 100); |
947 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; | |
948 | break; | |
949 | } | |
950 | } else | |
951 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; | |
952 | spin_unlock_irqrestore(shost->host_lock, flags); | |
953 | } | |
954 | ||
955 | /** | |
956 | * ibmvfc_get_host_port_state - Get host port state | |
957 | * @shost: scsi host struct | |
958 | * | |
959 | * Return value: | |
960 | * none | |
961 | **/ | |
962 | static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) | |
963 | { | |
964 | struct ibmvfc_host *vhost = shost_priv(shost); | |
965 | unsigned long flags; | |
966 | ||
967 | spin_lock_irqsave(shost->host_lock, flags); | |
968 | switch (vhost->state) { | |
969 | case IBMVFC_INITIALIZING: | |
970 | case IBMVFC_ACTIVE: | |
971 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
972 | break; | |
973 | case IBMVFC_LINK_DOWN: | |
974 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
975 | break; | |
976 | case IBMVFC_LINK_DEAD: | |
977 | case IBMVFC_HOST_OFFLINE: | |
978 | fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; | |
979 | break; | |
980 | case IBMVFC_HALTED: | |
981 | fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; | |
982 | break; | |
0ae808e0 BK |
983 | case IBMVFC_NO_CRQ: |
984 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
985 | break; | |
072b91f9 BK |
986 | default: |
987 | ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); | |
988 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
989 | break; | |
990 | } | |
991 | spin_unlock_irqrestore(shost->host_lock, flags); | |
992 | } | |
993 | ||
994 | /** | |
995 | * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout | |
996 | * @rport: rport struct | |
997 | * @timeout: timeout value | |
998 | * | |
999 | * Return value: | |
1000 | * none | |
1001 | **/ | |
1002 | static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) | |
1003 | { | |
1004 | if (timeout) | |
1005 | rport->dev_loss_tmo = timeout; | |
1006 | else | |
1007 | rport->dev_loss_tmo = 1; | |
1008 | } | |
1009 | ||
b3c10489 BK |
1010 | /** |
1011 | * ibmvfc_release_tgt - Free memory allocated for a target | |
1012 | * @kref: kref struct | |
1013 | * | |
1014 | **/ | |
1015 | static void ibmvfc_release_tgt(struct kref *kref) | |
1016 | { | |
1017 | struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); | |
1018 | kfree(tgt); | |
1019 | } | |
1020 | ||
072b91f9 BK |
1021 | /** |
1022 | * ibmvfc_get_starget_node_name - Get SCSI target's node name | |
1023 | * @starget: scsi target struct | |
1024 | * | |
1025 | * Return value: | |
1026 | * none | |
1027 | **/ | |
1028 | static void ibmvfc_get_starget_node_name(struct scsi_target *starget) | |
1029 | { | |
b3c10489 | 1030 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1031 | fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; |
b3c10489 BK |
1032 | if (tgt) |
1033 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1034 | } |
1035 | ||
1036 | /** | |
1037 | * ibmvfc_get_starget_port_name - Get SCSI target's port name | |
1038 | * @starget: scsi target struct | |
1039 | * | |
1040 | * Return value: | |
1041 | * none | |
1042 | **/ | |
1043 | static void ibmvfc_get_starget_port_name(struct scsi_target *starget) | |
1044 | { | |
b3c10489 | 1045 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1046 | fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; |
b3c10489 BK |
1047 | if (tgt) |
1048 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1049 | } |
1050 | ||
1051 | /** | |
1052 | * ibmvfc_get_starget_port_id - Get SCSI target's port ID | |
1053 | * @starget: scsi target struct | |
1054 | * | |
1055 | * Return value: | |
1056 | * none | |
1057 | **/ | |
1058 | static void ibmvfc_get_starget_port_id(struct scsi_target *starget) | |
1059 | { | |
b3c10489 | 1060 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1061 | fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; |
b3c10489 BK |
1062 | if (tgt) |
1063 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1064 | } |
1065 | ||
1066 | /** | |
1067 | * ibmvfc_wait_while_resetting - Wait while the host resets | |
1068 | * @vhost: ibmvfc host struct | |
1069 | * | |
1070 | * Return value: | |
1071 | * 0 on success / other on failure | |
1072 | **/ | |
1073 | static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) | |
1074 | { | |
1075 | long timeout = wait_event_timeout(vhost->init_wait_q, | |
3eddc569 BK |
1076 | ((vhost->state == IBMVFC_ACTIVE || |
1077 | vhost->state == IBMVFC_HOST_OFFLINE || | |
1078 | vhost->state == IBMVFC_LINK_DEAD) && | |
1079 | vhost->action == IBMVFC_HOST_ACTION_NONE), | |
072b91f9 BK |
1080 | (init_timeout * HZ)); |
1081 | ||
1082 | return timeout ? 0 : -EIO; | |
1083 | } | |
1084 | ||
1085 | /** | |
1086 | * ibmvfc_issue_fc_host_lip - Re-initiate link initialization | |
1087 | * @shost: scsi host struct | |
1088 | * | |
1089 | * Return value: | |
1090 | * 0 on success / other on failure | |
1091 | **/ | |
1092 | static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) | |
1093 | { | |
1094 | struct ibmvfc_host *vhost = shost_priv(shost); | |
1095 | ||
1096 | dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); | |
1097 | ibmvfc_reset_host(vhost); | |
1098 | return ibmvfc_wait_while_resetting(vhost); | |
1099 | } | |
1100 | ||
1101 | /** | |
1102 | * ibmvfc_gather_partition_info - Gather info about the LPAR | |
1103 | * | |
1104 | * Return value: | |
1105 | * none | |
1106 | **/ | |
1107 | static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) | |
1108 | { | |
1109 | struct device_node *rootdn; | |
1110 | const char *name; | |
1111 | const unsigned int *num; | |
1112 | ||
1113 | rootdn = of_find_node_by_path("/"); | |
1114 | if (!rootdn) | |
1115 | return; | |
1116 | ||
1117 | name = of_get_property(rootdn, "ibm,partition-name", NULL); | |
1118 | if (name) | |
1119 | strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); | |
1120 | num = of_get_property(rootdn, "ibm,partition-no", NULL); | |
1121 | if (num) | |
1122 | vhost->partition_number = *num; | |
1123 | of_node_put(rootdn); | |
1124 | } | |
1125 | ||
1126 | /** | |
1127 | * ibmvfc_set_login_info - Setup info for NPIV login | |
1128 | * @vhost: ibmvfc host struct | |
1129 | * | |
1130 | * Return value: | |
1131 | * none | |
1132 | **/ | |
1133 | static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) | |
1134 | { | |
1135 | struct ibmvfc_npiv_login *login_info = &vhost->login_info; | |
1136 | struct device_node *of_node = vhost->dev->archdata.of_node; | |
1137 | const char *location; | |
1138 | ||
1139 | memset(login_info, 0, sizeof(*login_info)); | |
1140 | ||
1141 | login_info->ostype = IBMVFC_OS_LINUX; | |
1142 | login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; | |
1143 | login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); | |
1144 | login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); | |
1145 | login_info->partition_num = vhost->partition_number; | |
1146 | login_info->vfc_frame_version = 1; | |
1147 | login_info->fcp_version = 3; | |
1148 | if (vhost->client_migrated) | |
1149 | login_info->flags = IBMVFC_CLIENT_MIGRATED; | |
1150 | ||
1151 | login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; | |
1152 | login_info->capabilities = IBMVFC_CAN_MIGRATE; | |
1153 | login_info->async.va = vhost->async_crq.msg_token; | |
52d7e861 | 1154 | login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); |
072b91f9 BK |
1155 | strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); |
1156 | strncpy(login_info->device_name, | |
71610f55 | 1157 | dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); |
072b91f9 BK |
1158 | |
1159 | location = of_get_property(of_node, "ibm,loc-code", NULL); | |
71610f55 | 1160 | location = location ? location : dev_name(vhost->dev); |
072b91f9 BK |
1161 | strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); |
1162 | } | |
1163 | ||
1164 | /** | |
1165 | * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host | |
1166 | * @vhost: ibmvfc host who owns the event pool | |
1167 | * | |
1168 | * Returns zero on success. | |
1169 | **/ | |
1170 | static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) | |
1171 | { | |
1172 | int i; | |
1173 | struct ibmvfc_event_pool *pool = &vhost->pool; | |
1174 | ||
1175 | ENTER; | |
1176 | pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; | |
1177 | pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); | |
1178 | if (!pool->events) | |
1179 | return -ENOMEM; | |
1180 | ||
1181 | pool->iu_storage = dma_alloc_coherent(vhost->dev, | |
1182 | pool->size * sizeof(*pool->iu_storage), | |
1183 | &pool->iu_token, 0); | |
1184 | ||
1185 | if (!pool->iu_storage) { | |
1186 | kfree(pool->events); | |
1187 | return -ENOMEM; | |
1188 | } | |
1189 | ||
1190 | for (i = 0; i < pool->size; ++i) { | |
1191 | struct ibmvfc_event *evt = &pool->events[i]; | |
1192 | atomic_set(&evt->free, 1); | |
1193 | evt->crq.valid = 0x80; | |
1194 | evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); | |
1195 | evt->xfer_iu = pool->iu_storage + i; | |
1196 | evt->vhost = vhost; | |
1197 | evt->ext_list = NULL; | |
1198 | list_add_tail(&evt->queue, &vhost->free); | |
1199 | } | |
1200 | ||
1201 | LEAVE; | |
1202 | return 0; | |
1203 | } | |
1204 | ||
1205 | /** | |
1206 | * ibmvfc_free_event_pool - Frees memory of the event pool of a host | |
1207 | * @vhost: ibmvfc host who owns the event pool | |
1208 | * | |
1209 | **/ | |
1210 | static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) | |
1211 | { | |
1212 | int i; | |
1213 | struct ibmvfc_event_pool *pool = &vhost->pool; | |
1214 | ||
1215 | ENTER; | |
1216 | for (i = 0; i < pool->size; ++i) { | |
1217 | list_del(&pool->events[i].queue); | |
1218 | BUG_ON(atomic_read(&pool->events[i].free) != 1); | |
1219 | if (pool->events[i].ext_list) | |
1220 | dma_pool_free(vhost->sg_pool, | |
1221 | pool->events[i].ext_list, | |
1222 | pool->events[i].ext_list_token); | |
1223 | } | |
1224 | ||
1225 | kfree(pool->events); | |
1226 | dma_free_coherent(vhost->dev, | |
1227 | pool->size * sizeof(*pool->iu_storage), | |
1228 | pool->iu_storage, pool->iu_token); | |
1229 | LEAVE; | |
1230 | } | |
1231 | ||
1232 | /** | |
1233 | * ibmvfc_get_event - Gets the next free event in pool | |
1234 | * @vhost: ibmvfc host struct | |
1235 | * | |
1236 | * Returns a free event from the pool. | |
1237 | **/ | |
1238 | static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) | |
1239 | { | |
1240 | struct ibmvfc_event *evt; | |
1241 | ||
1242 | BUG_ON(list_empty(&vhost->free)); | |
1243 | evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); | |
1244 | atomic_set(&evt->free, 0); | |
1245 | list_del(&evt->queue); | |
1246 | return evt; | |
1247 | } | |
1248 | ||
1249 | /** | |
1250 | * ibmvfc_init_event - Initialize fields in an event struct that are always | |
1251 | * required. | |
1252 | * @evt: The event | |
1253 | * @done: Routine to call when the event is responded to | |
1254 | * @format: SRP or MAD format | |
1255 | **/ | |
1256 | static void ibmvfc_init_event(struct ibmvfc_event *evt, | |
1257 | void (*done) (struct ibmvfc_event *), u8 format) | |
1258 | { | |
1259 | evt->cmnd = NULL; | |
1260 | evt->sync_iu = NULL; | |
1261 | evt->crq.format = format; | |
1262 | evt->done = done; | |
ad8dcffa | 1263 | evt->eh_comp = NULL; |
072b91f9 BK |
1264 | } |
1265 | ||
1266 | /** | |
1267 | * ibmvfc_map_sg_list - Initialize scatterlist | |
1268 | * @scmd: scsi command struct | |
1269 | * @nseg: number of scatterlist segments | |
1270 | * @md: memory descriptor list to initialize | |
1271 | **/ | |
1272 | static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, | |
1273 | struct srp_direct_buf *md) | |
1274 | { | |
1275 | int i; | |
1276 | struct scatterlist *sg; | |
1277 | ||
1278 | scsi_for_each_sg(scmd, sg, nseg, i) { | |
1279 | md[i].va = sg_dma_address(sg); | |
1280 | md[i].len = sg_dma_len(sg); | |
1281 | md[i].key = 0; | |
1282 | } | |
1283 | } | |
1284 | ||
1285 | /** | |
1286 | * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields | |
1287 | * @scmd: Scsi_Cmnd with the scatterlist | |
1288 | * @evt: ibmvfc event struct | |
1289 | * @vfc_cmd: vfc_cmd that contains the memory descriptor | |
1290 | * @dev: device for which to map dma memory | |
1291 | * | |
1292 | * Returns: | |
1293 | * 0 on success / non-zero on failure | |
1294 | **/ | |
1295 | static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, | |
1296 | struct ibmvfc_event *evt, | |
1297 | struct ibmvfc_cmd *vfc_cmd, struct device *dev) | |
1298 | { | |
1299 | ||
1300 | int sg_mapped; | |
1301 | struct srp_direct_buf *data = &vfc_cmd->ioba; | |
1302 | struct ibmvfc_host *vhost = dev_get_drvdata(dev); | |
1303 | ||
1304 | sg_mapped = scsi_dma_map(scmd); | |
1305 | if (!sg_mapped) { | |
1306 | vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; | |
1307 | return 0; | |
1308 | } else if (unlikely(sg_mapped < 0)) { | |
1309 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1310 | scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); | |
1311 | return sg_mapped; | |
1312 | } | |
1313 | ||
1314 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { | |
1315 | vfc_cmd->flags |= IBMVFC_WRITE; | |
1316 | vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; | |
1317 | } else { | |
1318 | vfc_cmd->flags |= IBMVFC_READ; | |
1319 | vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; | |
1320 | } | |
1321 | ||
1322 | if (sg_mapped == 1) { | |
1323 | ibmvfc_map_sg_list(scmd, sg_mapped, data); | |
1324 | return 0; | |
1325 | } | |
1326 | ||
1327 | vfc_cmd->flags |= IBMVFC_SCATTERLIST; | |
1328 | ||
1329 | if (!evt->ext_list) { | |
1330 | evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, | |
1331 | &evt->ext_list_token); | |
1332 | ||
1333 | if (!evt->ext_list) { | |
64b840dd BK |
1334 | scsi_dma_unmap(scmd); |
1335 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1336 | scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); | |
072b91f9 BK |
1337 | return -ENOMEM; |
1338 | } | |
1339 | } | |
1340 | ||
1341 | ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); | |
1342 | ||
1343 | data->va = evt->ext_list_token; | |
1344 | data->len = sg_mapped * sizeof(struct srp_direct_buf); | |
1345 | data->key = 0; | |
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | /** | |
1350 | * ibmvfc_timeout - Internal command timeout handler | |
1351 | * @evt: struct ibmvfc_event that timed out | |
1352 | * | |
1353 | * Called when an internally generated command times out | |
1354 | **/ | |
1355 | static void ibmvfc_timeout(struct ibmvfc_event *evt) | |
1356 | { | |
1357 | struct ibmvfc_host *vhost = evt->vhost; | |
1358 | dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); | |
1359 | ibmvfc_reset_host(vhost); | |
1360 | } | |
1361 | ||
1362 | /** | |
1363 | * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() | |
1364 | * @evt: event to be sent | |
1365 | * @vhost: ibmvfc host struct | |
1366 | * @timeout: timeout in seconds - 0 means do not time command | |
1367 | * | |
1368 | * Returns the value returned from ibmvfc_send_crq(). (Zero for success) | |
1369 | **/ | |
1370 | static int ibmvfc_send_event(struct ibmvfc_event *evt, | |
1371 | struct ibmvfc_host *vhost, unsigned long timeout) | |
1372 | { | |
1373 | u64 *crq_as_u64 = (u64 *) &evt->crq; | |
1374 | int rc; | |
1375 | ||
1376 | /* Copy the IU into the transfer area */ | |
1377 | *evt->xfer_iu = evt->iu; | |
1378 | if (evt->crq.format == IBMVFC_CMD_FORMAT) | |
1379 | evt->xfer_iu->cmd.tag = (u64)evt; | |
1380 | else if (evt->crq.format == IBMVFC_MAD_FORMAT) | |
1381 | evt->xfer_iu->mad_common.tag = (u64)evt; | |
1382 | else | |
1383 | BUG(); | |
1384 | ||
1385 | list_add_tail(&evt->queue, &vhost->sent); | |
1386 | init_timer(&evt->timer); | |
1387 | ||
1388 | if (timeout) { | |
1389 | evt->timer.data = (unsigned long) evt; | |
1390 | evt->timer.expires = jiffies + (timeout * HZ); | |
1391 | evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; | |
1392 | add_timer(&evt->timer); | |
1393 | } | |
1394 | ||
a528ab7a BK |
1395 | mb(); |
1396 | ||
072b91f9 BK |
1397 | if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { |
1398 | list_del(&evt->queue); | |
1399 | del_timer(&evt->timer); | |
1400 | ||
1401 | /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. | |
1402 | * Firmware will send a CRQ with a transport event (0xFF) to | |
1403 | * tell this client what has happened to the transport. This | |
1404 | * will be handled in ibmvfc_handle_crq() | |
1405 | */ | |
1406 | if (rc == H_CLOSED) { | |
1407 | if (printk_ratelimit()) | |
1408 | dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); | |
1409 | if (evt->cmnd) | |
1410 | scsi_dma_unmap(evt->cmnd); | |
1411 | ibmvfc_free_event(evt); | |
1412 | return SCSI_MLQUEUE_HOST_BUSY; | |
1413 | } | |
1414 | ||
1415 | dev_err(vhost->dev, "Send error (rc=%d)\n", rc); | |
1416 | if (evt->cmnd) { | |
1417 | evt->cmnd->result = DID_ERROR << 16; | |
1418 | evt->done = ibmvfc_scsi_eh_done; | |
1419 | } else | |
1420 | evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; | |
1421 | ||
1422 | evt->done(evt); | |
1423 | } else | |
1424 | ibmvfc_trc_start(evt); | |
1425 | ||
1426 | return 0; | |
1427 | } | |
1428 | ||
1429 | /** | |
1430 | * ibmvfc_log_error - Log an error for the failed command if appropriate | |
1431 | * @evt: ibmvfc event to log | |
1432 | * | |
1433 | **/ | |
1434 | static void ibmvfc_log_error(struct ibmvfc_event *evt) | |
1435 | { | |
1436 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
1437 | struct ibmvfc_host *vhost = evt->vhost; | |
1438 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; | |
1439 | struct scsi_cmnd *cmnd = evt->cmnd; | |
1440 | const char *err = unknown_error; | |
1441 | int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); | |
1442 | int logerr = 0; | |
1443 | int rsp_code = 0; | |
1444 | ||
1445 | if (index >= 0) { | |
1446 | logerr = cmd_status[index].log; | |
1447 | err = cmd_status[index].name; | |
1448 | } | |
1449 | ||
0ae808e0 | 1450 | if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) |
072b91f9 BK |
1451 | return; |
1452 | ||
1453 | if (rsp->flags & FCP_RSP_LEN_VALID) | |
1454 | rsp_code = rsp->data.info.rsp_code; | |
1455 | ||
1456 | scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " | |
1457 | "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", | |
1458 | cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, | |
1459 | rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); | |
1460 | } | |
1461 | ||
1462 | /** | |
1463 | * ibmvfc_scsi_done - Handle responses from commands | |
1464 | * @evt: ibmvfc event to be handled | |
1465 | * | |
1466 | * Used as a callback when sending scsi cmds. | |
1467 | **/ | |
1468 | static void ibmvfc_scsi_done(struct ibmvfc_event *evt) | |
1469 | { | |
1470 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
1471 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; | |
1472 | struct scsi_cmnd *cmnd = evt->cmnd; | |
2bac406d BK |
1473 | u32 rsp_len = 0; |
1474 | u32 sense_len = rsp->fcp_sense_len; | |
072b91f9 BK |
1475 | |
1476 | if (cmnd) { | |
1477 | if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) | |
1478 | scsi_set_resid(cmnd, vfc_cmd->adapter_resid); | |
1479 | else if (rsp->flags & FCP_RESID_UNDER) | |
1480 | scsi_set_resid(cmnd, rsp->fcp_resid); | |
1481 | else | |
1482 | scsi_set_resid(cmnd, 0); | |
1483 | ||
1484 | if (vfc_cmd->status) { | |
1485 | cmnd->result = ibmvfc_get_err_result(vfc_cmd); | |
1486 | ||
1487 | if (rsp->flags & FCP_RSP_LEN_VALID) | |
1488 | rsp_len = rsp->fcp_rsp_len; | |
1489 | if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) | |
1490 | sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; | |
2bac406d | 1491 | if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) |
072b91f9 | 1492 | memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); |
646d3857 BK |
1493 | if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED)) |
1494 | ibmvfc_reinit_host(evt->vhost); | |
072b91f9 | 1495 | |
50119dad BK |
1496 | if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) |
1497 | cmnd->result = (DID_ERROR << 16); | |
1498 | ||
072b91f9 BK |
1499 | ibmvfc_log_error(evt); |
1500 | } | |
1501 | ||
1502 | if (!cmnd->result && | |
1503 | (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) | |
1504 | cmnd->result = (DID_ERROR << 16); | |
1505 | ||
1506 | scsi_dma_unmap(cmnd); | |
1507 | cmnd->scsi_done(cmnd); | |
1508 | } | |
1509 | ||
ad8dcffa BK |
1510 | if (evt->eh_comp) |
1511 | complete(evt->eh_comp); | |
1512 | ||
072b91f9 BK |
1513 | ibmvfc_free_event(evt); |
1514 | } | |
1515 | ||
1516 | /** | |
1517 | * ibmvfc_host_chkready - Check if the host can accept commands | |
1518 | * @vhost: struct ibmvfc host | |
1519 | * | |
1520 | * Returns: | |
1521 | * 1 if host can accept command / 0 if not | |
1522 | **/ | |
1523 | static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) | |
1524 | { | |
1525 | int result = 0; | |
1526 | ||
1527 | switch (vhost->state) { | |
1528 | case IBMVFC_LINK_DEAD: | |
1529 | case IBMVFC_HOST_OFFLINE: | |
1530 | result = DID_NO_CONNECT << 16; | |
1531 | break; | |
1532 | case IBMVFC_NO_CRQ: | |
1533 | case IBMVFC_INITIALIZING: | |
1534 | case IBMVFC_HALTED: | |
1535 | case IBMVFC_LINK_DOWN: | |
1536 | result = DID_REQUEUE << 16; | |
1537 | break; | |
1538 | case IBMVFC_ACTIVE: | |
1539 | result = 0; | |
1540 | break; | |
1541 | }; | |
1542 | ||
1543 | return result; | |
1544 | } | |
1545 | ||
1546 | /** | |
1547 | * ibmvfc_queuecommand - The queuecommand function of the scsi template | |
1548 | * @cmnd: struct scsi_cmnd to be executed | |
1549 | * @done: Callback function to be called when cmnd is completed | |
1550 | * | |
1551 | * Returns: | |
1552 | * 0 on success / other on failure | |
1553 | **/ | |
1554 | static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, | |
1555 | void (*done) (struct scsi_cmnd *)) | |
1556 | { | |
1557 | struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); | |
1558 | struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); | |
1559 | struct ibmvfc_cmd *vfc_cmd; | |
1560 | struct ibmvfc_event *evt; | |
1561 | u8 tag[2]; | |
1562 | int rc; | |
1563 | ||
1564 | if (unlikely((rc = fc_remote_port_chkready(rport))) || | |
1565 | unlikely((rc = ibmvfc_host_chkready(vhost)))) { | |
1566 | cmnd->result = rc; | |
1567 | done(cmnd); | |
1568 | return 0; | |
1569 | } | |
1570 | ||
1571 | cmnd->result = (DID_OK << 16); | |
1572 | evt = ibmvfc_get_event(vhost); | |
1573 | ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); | |
1574 | evt->cmnd = cmnd; | |
1575 | cmnd->scsi_done = done; | |
1576 | vfc_cmd = &evt->iu.cmd; | |
1577 | memset(vfc_cmd, 0, sizeof(*vfc_cmd)); | |
1578 | vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); | |
1579 | vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); | |
1580 | vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; | |
1581 | vfc_cmd->payload_len = sizeof(vfc_cmd->iu); | |
1582 | vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); | |
1583 | vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; | |
1584 | vfc_cmd->tgt_scsi_id = rport->port_id; | |
072b91f9 BK |
1585 | vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); |
1586 | int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); | |
1587 | memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); | |
1588 | ||
1589 | if (scsi_populate_tag_msg(cmnd, tag)) { | |
1590 | vfc_cmd->task_tag = tag[1]; | |
1591 | switch (tag[0]) { | |
1592 | case MSG_SIMPLE_TAG: | |
1593 | vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; | |
1594 | break; | |
1595 | case MSG_HEAD_TAG: | |
1596 | vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; | |
1597 | break; | |
1598 | case MSG_ORDERED_TAG: | |
1599 | vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; | |
1600 | break; | |
1601 | }; | |
1602 | } | |
1603 | ||
1604 | if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) | |
1605 | return ibmvfc_send_event(evt, vhost, 0); | |
1606 | ||
1607 | ibmvfc_free_event(evt); | |
1608 | if (rc == -ENOMEM) | |
1609 | return SCSI_MLQUEUE_HOST_BUSY; | |
1610 | ||
1611 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1612 | scmd_printk(KERN_ERR, cmnd, | |
1613 | "Failed to map DMA buffer for command. rc=%d\n", rc); | |
1614 | ||
1615 | cmnd->result = DID_ERROR << 16; | |
1616 | done(cmnd); | |
1617 | return 0; | |
1618 | } | |
1619 | ||
1620 | /** | |
1621 | * ibmvfc_sync_completion - Signal that a synchronous command has completed | |
1622 | * @evt: ibmvfc event struct | |
1623 | * | |
1624 | **/ | |
1625 | static void ibmvfc_sync_completion(struct ibmvfc_event *evt) | |
1626 | { | |
1627 | /* copy the response back */ | |
1628 | if (evt->sync_iu) | |
1629 | *evt->sync_iu = *evt->xfer_iu; | |
1630 | ||
1631 | complete(&evt->comp); | |
1632 | } | |
1633 | ||
1634 | /** | |
1635 | * ibmvfc_reset_device - Reset the device with the specified reset type | |
1636 | * @sdev: scsi device to reset | |
1637 | * @type: reset type | |
1638 | * @desc: reset type description for log messages | |
1639 | * | |
1640 | * Returns: | |
1641 | * 0 on success / other on failure | |
1642 | **/ | |
1643 | static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) | |
1644 | { | |
1645 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
1646 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
1647 | struct ibmvfc_cmd *tmf; | |
50ed9a00 | 1648 | struct ibmvfc_event *evt = NULL; |
072b91f9 BK |
1649 | union ibmvfc_iu rsp_iu; |
1650 | struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; | |
1651 | int rsp_rc = -EBUSY; | |
1652 | unsigned long flags; | |
1653 | int rsp_code = 0; | |
1654 | ||
1655 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1656 | if (vhost->state == IBMVFC_ACTIVE) { | |
1657 | evt = ibmvfc_get_event(vhost); | |
1658 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); | |
1659 | ||
1660 | tmf = &evt->iu.cmd; | |
1661 | memset(tmf, 0, sizeof(*tmf)); | |
1662 | tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); | |
1663 | tmf->resp.len = sizeof(tmf->rsp); | |
1664 | tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; | |
1665 | tmf->payload_len = sizeof(tmf->iu); | |
1666 | tmf->resp_len = sizeof(tmf->rsp); | |
1667 | tmf->cancel_key = (unsigned long)sdev->hostdata; | |
1668 | tmf->tgt_scsi_id = rport->port_id; | |
1669 | int_to_scsilun(sdev->lun, &tmf->iu.lun); | |
1670 | tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); | |
1671 | tmf->iu.tmf_flags = type; | |
1672 | evt->sync_iu = &rsp_iu; | |
1673 | ||
1674 | init_completion(&evt->comp); | |
1675 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
1676 | } | |
1677 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1678 | ||
1679 | if (rsp_rc != 0) { | |
1680 | sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", | |
1681 | desc, rsp_rc); | |
1682 | return -EIO; | |
1683 | } | |
1684 | ||
1685 | sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); | |
1686 | wait_for_completion(&evt->comp); | |
1687 | ||
1688 | if (rsp_iu.cmd.status) { | |
1689 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) | |
1690 | rsp_code = fc_rsp->data.info.rsp_code; | |
1691 | ||
1692 | sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " | |
1693 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", | |
1694 | desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), | |
1695 | rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, | |
1696 | fc_rsp->scsi_status); | |
1697 | rsp_rc = -EIO; | |
1698 | } else | |
1699 | sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); | |
1700 | ||
1701 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1702 | ibmvfc_free_event(evt); | |
1703 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1704 | return rsp_rc; | |
1705 | } | |
1706 | ||
1707 | /** | |
1708 | * ibmvfc_abort_task_set - Abort outstanding commands to the device | |
1709 | * @sdev: scsi device to abort commands | |
1710 | * | |
1711 | * This sends an Abort Task Set to the VIOS for the specified device. This does | |
1712 | * NOT send any cancel to the VIOS. That must be done separately. | |
1713 | * | |
1714 | * Returns: | |
1715 | * 0 on success / other on failure | |
1716 | **/ | |
1717 | static int ibmvfc_abort_task_set(struct scsi_device *sdev) | |
1718 | { | |
1719 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
1720 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
1721 | struct ibmvfc_cmd *tmf; | |
1722 | struct ibmvfc_event *evt, *found_evt; | |
1723 | union ibmvfc_iu rsp_iu; | |
1724 | struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; | |
1725 | int rsp_rc = -EBUSY; | |
1726 | unsigned long flags; | |
1727 | int rsp_code = 0; | |
1728 | ||
1729 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1730 | found_evt = NULL; | |
1731 | list_for_each_entry(evt, &vhost->sent, queue) { | |
1732 | if (evt->cmnd && evt->cmnd->device == sdev) { | |
1733 | found_evt = evt; | |
1734 | break; | |
1735 | } | |
1736 | } | |
1737 | ||
1738 | if (!found_evt) { | |
1739 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1740 | sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); | |
1741 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1742 | return 0; | |
1743 | } | |
1744 | ||
1745 | if (vhost->state == IBMVFC_ACTIVE) { | |
1746 | evt = ibmvfc_get_event(vhost); | |
1747 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); | |
1748 | ||
1749 | tmf = &evt->iu.cmd; | |
1750 | memset(tmf, 0, sizeof(*tmf)); | |
1751 | tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); | |
1752 | tmf->resp.len = sizeof(tmf->rsp); | |
1753 | tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; | |
1754 | tmf->payload_len = sizeof(tmf->iu); | |
1755 | tmf->resp_len = sizeof(tmf->rsp); | |
1756 | tmf->cancel_key = (unsigned long)sdev->hostdata; | |
1757 | tmf->tgt_scsi_id = rport->port_id; | |
1758 | int_to_scsilun(sdev->lun, &tmf->iu.lun); | |
1759 | tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); | |
1760 | tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; | |
1761 | evt->sync_iu = &rsp_iu; | |
1762 | ||
1763 | init_completion(&evt->comp); | |
1764 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
1765 | } | |
1766 | ||
1767 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1768 | ||
1769 | if (rsp_rc != 0) { | |
1770 | sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); | |
1771 | return -EIO; | |
1772 | } | |
1773 | ||
1774 | sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); | |
1775 | wait_for_completion(&evt->comp); | |
1776 | ||
1777 | if (rsp_iu.cmd.status) { | |
1778 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) | |
1779 | rsp_code = fc_rsp->data.info.rsp_code; | |
1780 | ||
1781 | sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " | |
1782 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", | |
1783 | ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), | |
1784 | rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, | |
1785 | fc_rsp->scsi_status); | |
1786 | rsp_rc = -EIO; | |
1787 | } else | |
1788 | sdev_printk(KERN_INFO, sdev, "Abort successful\n"); | |
1789 | ||
1790 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1791 | ibmvfc_free_event(evt); | |
1792 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1793 | return rsp_rc; | |
1794 | } | |
1795 | ||
1796 | /** | |
1797 | * ibmvfc_cancel_all - Cancel all outstanding commands to the device | |
1798 | * @sdev: scsi device to cancel commands | |
1799 | * @type: type of error recovery being performed | |
1800 | * | |
1801 | * This sends a cancel to the VIOS for the specified device. This does | |
1802 | * NOT send any abort to the actual device. That must be done separately. | |
1803 | * | |
1804 | * Returns: | |
1805 | * 0 on success / other on failure | |
1806 | **/ | |
1807 | static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) | |
1808 | { | |
1809 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
ad8dcffa BK |
1810 | struct scsi_target *starget = scsi_target(sdev); |
1811 | struct fc_rport *rport = starget_to_rport(starget); | |
072b91f9 BK |
1812 | struct ibmvfc_tmf *tmf; |
1813 | struct ibmvfc_event *evt, *found_evt; | |
1814 | union ibmvfc_iu rsp; | |
1815 | int rsp_rc = -EBUSY; | |
1816 | unsigned long flags; | |
1817 | u16 status; | |
1818 | ||
1819 | ENTER; | |
1820 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1821 | found_evt = NULL; | |
1822 | list_for_each_entry(evt, &vhost->sent, queue) { | |
1823 | if (evt->cmnd && evt->cmnd->device == sdev) { | |
1824 | found_evt = evt; | |
1825 | break; | |
1826 | } | |
1827 | } | |
1828 | ||
1829 | if (!found_evt) { | |
1830 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1831 | sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); | |
1832 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1833 | return 0; | |
1834 | } | |
1835 | ||
1836 | if (vhost->state == IBMVFC_ACTIVE) { | |
1837 | evt = ibmvfc_get_event(vhost); | |
1838 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); | |
1839 | ||
1840 | tmf = &evt->iu.tmf; | |
1841 | memset(tmf, 0, sizeof(*tmf)); | |
1842 | tmf->common.version = 1; | |
1843 | tmf->common.opcode = IBMVFC_TMF_MAD; | |
1844 | tmf->common.length = sizeof(*tmf); | |
1845 | tmf->scsi_id = rport->port_id; | |
1846 | int_to_scsilun(sdev->lun, &tmf->lun); | |
1847 | tmf->flags = (type | IBMVFC_TMF_LUA_VALID); | |
1848 | tmf->cancel_key = (unsigned long)sdev->hostdata; | |
ad8dcffa | 1849 | tmf->my_cancel_key = (unsigned long)starget->hostdata; |
072b91f9 BK |
1850 | |
1851 | evt->sync_iu = &rsp; | |
1852 | init_completion(&evt->comp); | |
1853 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
1854 | } | |
1855 | ||
1856 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1857 | ||
1858 | if (rsp_rc != 0) { | |
1859 | sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); | |
1860 | return -EIO; | |
1861 | } | |
1862 | ||
1863 | sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); | |
1864 | ||
1865 | wait_for_completion(&evt->comp); | |
1866 | status = rsp.mad_common.status; | |
1867 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1868 | ibmvfc_free_event(evt); | |
1869 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1870 | ||
1871 | if (status != IBMVFC_MAD_SUCCESS) { | |
1872 | sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); | |
1873 | return -EIO; | |
1874 | } | |
1875 | ||
1876 | sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); | |
1877 | return 0; | |
1878 | } | |
1879 | ||
ad8dcffa BK |
1880 | /** |
1881 | * ibmvfc_match_target - Match function for specified target | |
1882 | * @evt: ibmvfc event struct | |
1883 | * @device: device to match (starget) | |
1884 | * | |
1885 | * Returns: | |
1886 | * 1 if event matches starget / 0 if event does not match starget | |
1887 | **/ | |
1888 | static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) | |
1889 | { | |
1890 | if (evt->cmnd && scsi_target(evt->cmnd->device) == device) | |
1891 | return 1; | |
1892 | return 0; | |
1893 | } | |
1894 | ||
1895 | /** | |
1896 | * ibmvfc_match_lun - Match function for specified LUN | |
1897 | * @evt: ibmvfc event struct | |
1898 | * @device: device to match (sdev) | |
1899 | * | |
1900 | * Returns: | |
1901 | * 1 if event matches sdev / 0 if event does not match sdev | |
1902 | **/ | |
1903 | static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) | |
1904 | { | |
1905 | if (evt->cmnd && evt->cmnd->device == device) | |
1906 | return 1; | |
1907 | return 0; | |
1908 | } | |
1909 | ||
1910 | /** | |
1911 | * ibmvfc_wait_for_ops - Wait for ops to complete | |
1912 | * @vhost: ibmvfc host struct | |
1913 | * @device: device to match (starget or sdev) | |
1914 | * @match: match function | |
1915 | * | |
1916 | * Returns: | |
1917 | * SUCCESS / FAILED | |
1918 | **/ | |
1919 | static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, | |
1920 | int (*match) (struct ibmvfc_event *, void *)) | |
1921 | { | |
1922 | struct ibmvfc_event *evt; | |
1923 | DECLARE_COMPLETION_ONSTACK(comp); | |
1924 | int wait; | |
1925 | unsigned long flags; | |
1926 | signed long timeout = init_timeout * HZ; | |
1927 | ||
1928 | ENTER; | |
1929 | do { | |
1930 | wait = 0; | |
1931 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1932 | list_for_each_entry(evt, &vhost->sent, queue) { | |
1933 | if (match(evt, device)) { | |
1934 | evt->eh_comp = ∁ | |
1935 | wait++; | |
1936 | } | |
1937 | } | |
1938 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1939 | ||
1940 | if (wait) { | |
1941 | timeout = wait_for_completion_timeout(&comp, timeout); | |
1942 | ||
1943 | if (!timeout) { | |
1944 | wait = 0; | |
1945 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1946 | list_for_each_entry(evt, &vhost->sent, queue) { | |
1947 | if (match(evt, device)) { | |
1948 | evt->eh_comp = NULL; | |
1949 | wait++; | |
1950 | } | |
1951 | } | |
1952 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1953 | if (wait) | |
1954 | dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); | |
1955 | LEAVE; | |
1956 | return wait ? FAILED : SUCCESS; | |
1957 | } | |
1958 | } | |
1959 | } while (wait); | |
1960 | ||
1961 | LEAVE; | |
1962 | return SUCCESS; | |
1963 | } | |
1964 | ||
072b91f9 BK |
1965 | /** |
1966 | * ibmvfc_eh_abort_handler - Abort a command | |
1967 | * @cmd: scsi command to abort | |
1968 | * | |
1969 | * Returns: | |
1970 | * SUCCESS / FAILED | |
1971 | **/ | |
1972 | static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) | |
1973 | { | |
ad8dcffa BK |
1974 | struct scsi_device *sdev = cmd->device; |
1975 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
072b91f9 | 1976 | int cancel_rc, abort_rc; |
ad8dcffa | 1977 | int rc = FAILED; |
072b91f9 BK |
1978 | |
1979 | ENTER; | |
1980 | ibmvfc_wait_while_resetting(vhost); | |
ad8dcffa BK |
1981 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); |
1982 | abort_rc = ibmvfc_abort_task_set(sdev); | |
072b91f9 | 1983 | |
ad8dcffa BK |
1984 | if (!cancel_rc && !abort_rc) |
1985 | rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); | |
072b91f9 BK |
1986 | |
1987 | LEAVE; | |
ad8dcffa | 1988 | return rc; |
072b91f9 BK |
1989 | } |
1990 | ||
1991 | /** | |
1992 | * ibmvfc_eh_device_reset_handler - Reset a single LUN | |
1993 | * @cmd: scsi command struct | |
1994 | * | |
1995 | * Returns: | |
1996 | * SUCCESS / FAILED | |
1997 | **/ | |
1998 | static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) | |
1999 | { | |
ad8dcffa BK |
2000 | struct scsi_device *sdev = cmd->device; |
2001 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
072b91f9 | 2002 | int cancel_rc, reset_rc; |
ad8dcffa | 2003 | int rc = FAILED; |
072b91f9 BK |
2004 | |
2005 | ENTER; | |
2006 | ibmvfc_wait_while_resetting(vhost); | |
ad8dcffa BK |
2007 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); |
2008 | reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); | |
072b91f9 | 2009 | |
ad8dcffa BK |
2010 | if (!cancel_rc && !reset_rc) |
2011 | rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); | |
072b91f9 BK |
2012 | |
2013 | LEAVE; | |
ad8dcffa | 2014 | return rc; |
072b91f9 BK |
2015 | } |
2016 | ||
2017 | /** | |
2018 | * ibmvfc_dev_cancel_all - Device iterated cancel all function | |
2019 | * @sdev: scsi device struct | |
2020 | * @data: return code | |
2021 | * | |
2022 | **/ | |
2023 | static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data) | |
2024 | { | |
2025 | unsigned long *rc = data; | |
2026 | *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); | |
2027 | } | |
2028 | ||
2029 | /** | |
2030 | * ibmvfc_dev_abort_all - Device iterated abort task set function | |
2031 | * @sdev: scsi device struct | |
2032 | * @data: return code | |
2033 | * | |
2034 | **/ | |
2035 | static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) | |
2036 | { | |
2037 | unsigned long *rc = data; | |
2038 | *rc |= ibmvfc_abort_task_set(sdev); | |
2039 | } | |
2040 | ||
2041 | /** | |
2042 | * ibmvfc_eh_target_reset_handler - Reset the target | |
2043 | * @cmd: scsi command struct | |
2044 | * | |
2045 | * Returns: | |
2046 | * SUCCESS / FAILED | |
2047 | **/ | |
2048 | static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) | |
2049 | { | |
ad8dcffa BK |
2050 | struct scsi_device *sdev = cmd->device; |
2051 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
2052 | struct scsi_target *starget = scsi_target(sdev); | |
072b91f9 | 2053 | int reset_rc; |
ad8dcffa | 2054 | int rc = FAILED; |
072b91f9 | 2055 | unsigned long cancel_rc = 0; |
072b91f9 BK |
2056 | |
2057 | ENTER; | |
2058 | ibmvfc_wait_while_resetting(vhost); | |
2059 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); | |
ad8dcffa | 2060 | reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); |
072b91f9 | 2061 | |
ad8dcffa BK |
2062 | if (!cancel_rc && !reset_rc) |
2063 | rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); | |
072b91f9 BK |
2064 | |
2065 | LEAVE; | |
ad8dcffa | 2066 | return rc; |
072b91f9 BK |
2067 | } |
2068 | ||
2069 | /** | |
2070 | * ibmvfc_eh_host_reset_handler - Reset the connection to the server | |
2071 | * @cmd: struct scsi_cmnd having problems | |
2072 | * | |
2073 | **/ | |
2074 | static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) | |
2075 | { | |
2076 | int rc; | |
2077 | struct ibmvfc_host *vhost = shost_priv(cmd->device->host); | |
2078 | ||
2079 | dev_err(vhost->dev, "Resetting connection due to error recovery\n"); | |
2080 | rc = ibmvfc_issue_fc_host_lip(vhost->host); | |
2081 | return rc ? FAILED : SUCCESS; | |
2082 | } | |
2083 | ||
2084 | /** | |
2085 | * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. | |
2086 | * @rport: rport struct | |
2087 | * | |
2088 | * Return value: | |
2089 | * none | |
2090 | **/ | |
2091 | static void ibmvfc_terminate_rport_io(struct fc_rport *rport) | |
2092 | { | |
2093 | struct scsi_target *starget = to_scsi_target(&rport->dev); | |
2094 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2095 | struct ibmvfc_host *vhost = shost_priv(shost); | |
072b91f9 BK |
2096 | unsigned long cancel_rc = 0; |
2097 | unsigned long abort_rc = 0; | |
ad8dcffa | 2098 | int rc = FAILED; |
072b91f9 BK |
2099 | |
2100 | ENTER; | |
2101 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); | |
2102 | starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); | |
2103 | ||
ad8dcffa BK |
2104 | if (!cancel_rc && !abort_rc) |
2105 | rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); | |
2106 | ||
2107 | if (rc == FAILED) | |
072b91f9 | 2108 | ibmvfc_issue_fc_host_lip(shost); |
072b91f9 BK |
2109 | LEAVE; |
2110 | } | |
2111 | ||
2112 | static const struct { | |
2113 | enum ibmvfc_async_event ae; | |
2114 | const char *desc; | |
2115 | } ae_desc [] = { | |
2116 | { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, | |
2117 | { IBMVFC_AE_ELS_LOGO, "LOGO" }, | |
2118 | { IBMVFC_AE_ELS_PRLO, "PRLO" }, | |
2119 | { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, | |
2120 | { IBMVFC_AE_SCN_GROUP, "Group SCN" }, | |
2121 | { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, | |
2122 | { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, | |
2123 | { IBMVFC_AE_LINK_UP, "Link Up" }, | |
2124 | { IBMVFC_AE_LINK_DOWN, "Link Down" }, | |
2125 | { IBMVFC_AE_LINK_DEAD, "Link Dead" }, | |
2126 | { IBMVFC_AE_HALT, "Halt" }, | |
2127 | { IBMVFC_AE_RESUME, "Resume" }, | |
2128 | { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, | |
2129 | }; | |
2130 | ||
2131 | static const char *unknown_ae = "Unknown async"; | |
2132 | ||
2133 | /** | |
2134 | * ibmvfc_get_ae_desc - Get text description for async event | |
2135 | * @ae: async event | |
2136 | * | |
2137 | **/ | |
2138 | static const char *ibmvfc_get_ae_desc(u64 ae) | |
2139 | { | |
2140 | int i; | |
2141 | ||
2142 | for (i = 0; i < ARRAY_SIZE(ae_desc); i++) | |
2143 | if (ae_desc[i].ae == ae) | |
2144 | return ae_desc[i].desc; | |
2145 | ||
2146 | return unknown_ae; | |
2147 | } | |
2148 | ||
2149 | /** | |
2150 | * ibmvfc_handle_async - Handle an async event from the adapter | |
2151 | * @crq: crq to process | |
2152 | * @vhost: ibmvfc host struct | |
2153 | * | |
2154 | **/ | |
2155 | static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, | |
2156 | struct ibmvfc_host *vhost) | |
2157 | { | |
2158 | const char *desc = ibmvfc_get_ae_desc(crq->event); | |
2159 | ||
775a42ec SR |
2160 | ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx," |
2161 | " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name); | |
072b91f9 BK |
2162 | |
2163 | switch (crq->event) { | |
2164 | case IBMVFC_AE_LINK_UP: | |
2165 | case IBMVFC_AE_RESUME: | |
2166 | vhost->events_to_log |= IBMVFC_AE_LINKUP; | |
d2131b33 BK |
2167 | vhost->delay_init = 1; |
2168 | __ibmvfc_reset_host(vhost); | |
072b91f9 BK |
2169 | break; |
2170 | case IBMVFC_AE_SCN_FABRIC: | |
d2131b33 | 2171 | case IBMVFC_AE_SCN_DOMAIN: |
072b91f9 | 2172 | vhost->events_to_log |= IBMVFC_AE_RSCN; |
d2131b33 BK |
2173 | vhost->delay_init = 1; |
2174 | __ibmvfc_reset_host(vhost); | |
072b91f9 BK |
2175 | break; |
2176 | case IBMVFC_AE_SCN_NPORT: | |
2177 | case IBMVFC_AE_SCN_GROUP: | |
072b91f9 BK |
2178 | vhost->events_to_log |= IBMVFC_AE_RSCN; |
2179 | case IBMVFC_AE_ELS_LOGO: | |
2180 | case IBMVFC_AE_ELS_PRLO: | |
2181 | case IBMVFC_AE_ELS_PLOGI: | |
2182 | ibmvfc_reinit_host(vhost); | |
2183 | break; | |
2184 | case IBMVFC_AE_LINK_DOWN: | |
2185 | case IBMVFC_AE_ADAPTER_FAILED: | |
2186 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
2187 | break; | |
2188 | case IBMVFC_AE_LINK_DEAD: | |
2189 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
2190 | break; | |
2191 | case IBMVFC_AE_HALT: | |
2192 | ibmvfc_link_down(vhost, IBMVFC_HALTED); | |
2193 | break; | |
2194 | default: | |
775a42ec | 2195 | dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); |
072b91f9 BK |
2196 | break; |
2197 | }; | |
2198 | } | |
2199 | ||
2200 | /** | |
2201 | * ibmvfc_handle_crq - Handles and frees received events in the CRQ | |
2202 | * @crq: Command/Response queue | |
2203 | * @vhost: ibmvfc host struct | |
2204 | * | |
2205 | **/ | |
2206 | static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) | |
2207 | { | |
2208 | long rc; | |
2209 | struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; | |
2210 | ||
2211 | switch (crq->valid) { | |
2212 | case IBMVFC_CRQ_INIT_RSP: | |
2213 | switch (crq->format) { | |
2214 | case IBMVFC_CRQ_INIT: | |
2215 | dev_info(vhost->dev, "Partner initialized\n"); | |
2216 | /* Send back a response */ | |
2217 | rc = ibmvfc_send_crq_init_complete(vhost); | |
2218 | if (rc == 0) | |
cf6f10d7 | 2219 | ibmvfc_init_host(vhost, 0); |
072b91f9 BK |
2220 | else |
2221 | dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); | |
2222 | break; | |
2223 | case IBMVFC_CRQ_INIT_COMPLETE: | |
2224 | dev_info(vhost->dev, "Partner initialization complete\n"); | |
cf6f10d7 | 2225 | ibmvfc_init_host(vhost, 0); |
072b91f9 BK |
2226 | break; |
2227 | default: | |
2228 | dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); | |
2229 | } | |
2230 | return; | |
2231 | case IBMVFC_CRQ_XPORT_EVENT: | |
2232 | vhost->state = IBMVFC_NO_CRQ; | |
2233 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); | |
2234 | if (crq->format == IBMVFC_PARTITION_MIGRATED) { | |
2235 | /* We need to re-setup the interpartition connection */ | |
2236 | dev_info(vhost->dev, "Re-enabling adapter\n"); | |
2237 | vhost->client_migrated = 1; | |
2238 | ibmvfc_purge_requests(vhost, DID_REQUEUE); | |
2239 | if ((rc = ibmvfc_reenable_crq_queue(vhost)) || | |
2240 | (rc = ibmvfc_send_crq_init(vhost))) { | |
2241 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
2242 | dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); | |
2243 | } else | |
2244 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
2245 | } else { | |
2246 | dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); | |
2247 | ||
2248 | ibmvfc_purge_requests(vhost, DID_ERROR); | |
2249 | if ((rc = ibmvfc_reset_crq(vhost)) || | |
2250 | (rc = ibmvfc_send_crq_init(vhost))) { | |
2251 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
2252 | dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); | |
2253 | } else | |
2254 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
2255 | } | |
2256 | return; | |
2257 | case IBMVFC_CRQ_CMD_RSP: | |
2258 | break; | |
2259 | default: | |
2260 | dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); | |
2261 | return; | |
2262 | } | |
2263 | ||
2264 | if (crq->format == IBMVFC_ASYNC_EVENT) | |
2265 | return; | |
2266 | ||
2267 | /* The only kind of payload CRQs we should get are responses to | |
2268 | * things we send. Make sure this response is to something we | |
2269 | * actually sent | |
2270 | */ | |
2271 | if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { | |
775a42ec | 2272 | dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", |
072b91f9 BK |
2273 | crq->ioba); |
2274 | return; | |
2275 | } | |
2276 | ||
2277 | if (unlikely(atomic_read(&evt->free))) { | |
775a42ec | 2278 | dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", |
072b91f9 BK |
2279 | crq->ioba); |
2280 | return; | |
2281 | } | |
2282 | ||
2283 | del_timer(&evt->timer); | |
2284 | list_del(&evt->queue); | |
2285 | ibmvfc_trc_end(evt); | |
2286 | evt->done(evt); | |
2287 | } | |
2288 | ||
2289 | /** | |
2290 | * ibmvfc_scan_finished - Check if the device scan is done. | |
2291 | * @shost: scsi host struct | |
2292 | * @time: current elapsed time | |
2293 | * | |
2294 | * Returns: | |
2295 | * 0 if scan is not done / 1 if scan is done | |
2296 | **/ | |
2297 | static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) | |
2298 | { | |
2299 | unsigned long flags; | |
2300 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2301 | int done = 0; | |
2302 | ||
2303 | spin_lock_irqsave(shost->host_lock, flags); | |
2304 | if (time >= (init_timeout * HZ)) { | |
2305 | dev_info(vhost->dev, "Scan taking longer than %d seconds, " | |
2306 | "continuing initialization\n", init_timeout); | |
2307 | done = 1; | |
2308 | } | |
2309 | ||
43c8da90 | 2310 | if (vhost->scan_complete) |
072b91f9 BK |
2311 | done = 1; |
2312 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2313 | return done; | |
2314 | } | |
2315 | ||
2316 | /** | |
2317 | * ibmvfc_slave_alloc - Setup the device's task set value | |
2318 | * @sdev: struct scsi_device device to configure | |
2319 | * | |
2320 | * Set the device's task set value so that error handling works as | |
2321 | * expected. | |
2322 | * | |
2323 | * Returns: | |
2324 | * 0 on success / -ENXIO if device does not exist | |
2325 | **/ | |
2326 | static int ibmvfc_slave_alloc(struct scsi_device *sdev) | |
2327 | { | |
2328 | struct Scsi_Host *shost = sdev->host; | |
2329 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
2330 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2331 | unsigned long flags = 0; | |
2332 | ||
2333 | if (!rport || fc_remote_port_chkready(rport)) | |
2334 | return -ENXIO; | |
2335 | ||
2336 | spin_lock_irqsave(shost->host_lock, flags); | |
2337 | sdev->hostdata = (void *)(unsigned long)vhost->task_set++; | |
2338 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2339 | return 0; | |
2340 | } | |
2341 | ||
ad8dcffa BK |
2342 | /** |
2343 | * ibmvfc_target_alloc - Setup the target's task set value | |
2344 | * @starget: struct scsi_target | |
2345 | * | |
2346 | * Set the target's task set value so that error handling works as | |
2347 | * expected. | |
2348 | * | |
2349 | * Returns: | |
2350 | * 0 on success / -ENXIO if device does not exist | |
2351 | **/ | |
2352 | static int ibmvfc_target_alloc(struct scsi_target *starget) | |
2353 | { | |
2354 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2355 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2356 | unsigned long flags = 0; | |
2357 | ||
2358 | spin_lock_irqsave(shost->host_lock, flags); | |
2359 | starget->hostdata = (void *)(unsigned long)vhost->task_set++; | |
2360 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2361 | return 0; | |
2362 | } | |
2363 | ||
072b91f9 BK |
2364 | /** |
2365 | * ibmvfc_slave_configure - Configure the device | |
2366 | * @sdev: struct scsi_device device to configure | |
2367 | * | |
2368 | * Enable allow_restart for a device if it is a disk. Adjust the | |
2369 | * queue_depth here also. | |
2370 | * | |
2371 | * Returns: | |
2372 | * 0 | |
2373 | **/ | |
2374 | static int ibmvfc_slave_configure(struct scsi_device *sdev) | |
2375 | { | |
2376 | struct Scsi_Host *shost = sdev->host; | |
2377 | struct fc_rport *rport = starget_to_rport(sdev->sdev_target); | |
2378 | unsigned long flags = 0; | |
2379 | ||
2380 | spin_lock_irqsave(shost->host_lock, flags); | |
2381 | if (sdev->type == TYPE_DISK) | |
2382 | sdev->allow_restart = 1; | |
2383 | ||
2384 | if (sdev->tagged_supported) { | |
2385 | scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); | |
2386 | scsi_activate_tcq(sdev, sdev->queue_depth); | |
2387 | } else | |
2388 | scsi_deactivate_tcq(sdev, sdev->queue_depth); | |
2389 | ||
2390 | rport->dev_loss_tmo = dev_loss_tmo; | |
2391 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2392 | return 0; | |
2393 | } | |
2394 | ||
2395 | /** | |
2396 | * ibmvfc_change_queue_depth - Change the device's queue depth | |
2397 | * @sdev: scsi device struct | |
2398 | * @qdepth: depth to set | |
2399 | * | |
2400 | * Return value: | |
2401 | * actual depth set | |
2402 | **/ | |
2403 | static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) | |
2404 | { | |
2405 | if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) | |
2406 | qdepth = IBMVFC_MAX_CMDS_PER_LUN; | |
2407 | ||
2408 | scsi_adjust_queue_depth(sdev, 0, qdepth); | |
2409 | return sdev->queue_depth; | |
2410 | } | |
2411 | ||
2412 | /** | |
2413 | * ibmvfc_change_queue_type - Change the device's queue type | |
2414 | * @sdev: scsi device struct | |
2415 | * @tag_type: type of tags to use | |
2416 | * | |
2417 | * Return value: | |
2418 | * actual queue type set | |
2419 | **/ | |
2420 | static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) | |
2421 | { | |
2422 | if (sdev->tagged_supported) { | |
2423 | scsi_set_tag_type(sdev, tag_type); | |
2424 | ||
2425 | if (tag_type) | |
2426 | scsi_activate_tcq(sdev, sdev->queue_depth); | |
2427 | else | |
2428 | scsi_deactivate_tcq(sdev, sdev->queue_depth); | |
2429 | } else | |
2430 | tag_type = 0; | |
2431 | ||
2432 | return tag_type; | |
2433 | } | |
2434 | ||
2435 | static ssize_t ibmvfc_show_host_partition_name(struct device *dev, | |
2436 | struct device_attribute *attr, char *buf) | |
2437 | { | |
2438 | struct Scsi_Host *shost = class_to_shost(dev); | |
2439 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2440 | ||
2441 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2442 | vhost->login_buf->resp.partition_name); | |
2443 | } | |
2444 | ||
072b91f9 BK |
2445 | static ssize_t ibmvfc_show_host_device_name(struct device *dev, |
2446 | struct device_attribute *attr, char *buf) | |
2447 | { | |
2448 | struct Scsi_Host *shost = class_to_shost(dev); | |
2449 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2450 | ||
2451 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2452 | vhost->login_buf->resp.device_name); | |
2453 | } | |
2454 | ||
072b91f9 BK |
2455 | static ssize_t ibmvfc_show_host_loc_code(struct device *dev, |
2456 | struct device_attribute *attr, char *buf) | |
2457 | { | |
2458 | struct Scsi_Host *shost = class_to_shost(dev); | |
2459 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2460 | ||
2461 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2462 | vhost->login_buf->resp.port_loc_code); | |
2463 | } | |
2464 | ||
072b91f9 BK |
2465 | static ssize_t ibmvfc_show_host_drc_name(struct device *dev, |
2466 | struct device_attribute *attr, char *buf) | |
2467 | { | |
2468 | struct Scsi_Host *shost = class_to_shost(dev); | |
2469 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2470 | ||
2471 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2472 | vhost->login_buf->resp.drc_name); | |
2473 | } | |
2474 | ||
072b91f9 BK |
2475 | static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, |
2476 | struct device_attribute *attr, char *buf) | |
2477 | { | |
2478 | struct Scsi_Host *shost = class_to_shost(dev); | |
2479 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2480 | return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); | |
2481 | } | |
2482 | ||
072b91f9 BK |
2483 | /** |
2484 | * ibmvfc_show_log_level - Show the adapter's error logging level | |
2485 | * @dev: class device struct | |
2486 | * @buf: buffer | |
2487 | * | |
2488 | * Return value: | |
2489 | * number of bytes printed to buffer | |
2490 | **/ | |
2491 | static ssize_t ibmvfc_show_log_level(struct device *dev, | |
2492 | struct device_attribute *attr, char *buf) | |
2493 | { | |
2494 | struct Scsi_Host *shost = class_to_shost(dev); | |
2495 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2496 | unsigned long flags = 0; | |
2497 | int len; | |
2498 | ||
2499 | spin_lock_irqsave(shost->host_lock, flags); | |
2500 | len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); | |
2501 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2502 | return len; | |
2503 | } | |
2504 | ||
2505 | /** | |
2506 | * ibmvfc_store_log_level - Change the adapter's error logging level | |
2507 | * @dev: class device struct | |
2508 | * @buf: buffer | |
2509 | * | |
2510 | * Return value: | |
2511 | * number of bytes printed to buffer | |
2512 | **/ | |
2513 | static ssize_t ibmvfc_store_log_level(struct device *dev, | |
2514 | struct device_attribute *attr, | |
2515 | const char *buf, size_t count) | |
2516 | { | |
2517 | struct Scsi_Host *shost = class_to_shost(dev); | |
2518 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2519 | unsigned long flags = 0; | |
2520 | ||
2521 | spin_lock_irqsave(shost->host_lock, flags); | |
2522 | vhost->log_level = simple_strtoul(buf, NULL, 10); | |
2523 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2524 | return strlen(buf); | |
2525 | } | |
2526 | ||
85e2399e BK |
2527 | static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); |
2528 | static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); | |
2529 | static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); | |
2530 | static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); | |
2531 | static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); | |
2532 | static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, | |
2533 | ibmvfc_show_log_level, ibmvfc_store_log_level); | |
072b91f9 BK |
2534 | |
2535 | #ifdef CONFIG_SCSI_IBMVFC_TRACE | |
2536 | /** | |
2537 | * ibmvfc_read_trace - Dump the adapter trace | |
2538 | * @kobj: kobject struct | |
2539 | * @bin_attr: bin_attribute struct | |
2540 | * @buf: buffer | |
2541 | * @off: offset | |
2542 | * @count: buffer size | |
2543 | * | |
2544 | * Return value: | |
2545 | * number of bytes printed to buffer | |
2546 | **/ | |
2547 | static ssize_t ibmvfc_read_trace(struct kobject *kobj, | |
2548 | struct bin_attribute *bin_attr, | |
2549 | char *buf, loff_t off, size_t count) | |
2550 | { | |
2551 | struct device *dev = container_of(kobj, struct device, kobj); | |
2552 | struct Scsi_Host *shost = class_to_shost(dev); | |
2553 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2554 | unsigned long flags = 0; | |
2555 | int size = IBMVFC_TRACE_SIZE; | |
2556 | char *src = (char *)vhost->trace; | |
2557 | ||
2558 | if (off > size) | |
2559 | return 0; | |
2560 | if (off + count > size) { | |
2561 | size -= off; | |
2562 | count = size; | |
2563 | } | |
2564 | ||
2565 | spin_lock_irqsave(shost->host_lock, flags); | |
2566 | memcpy(buf, &src[off], count); | |
2567 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2568 | return count; | |
2569 | } | |
2570 | ||
2571 | static struct bin_attribute ibmvfc_trace_attr = { | |
2572 | .attr = { | |
2573 | .name = "trace", | |
2574 | .mode = S_IRUGO, | |
2575 | }, | |
2576 | .size = 0, | |
2577 | .read = ibmvfc_read_trace, | |
2578 | }; | |
2579 | #endif | |
2580 | ||
2581 | static struct device_attribute *ibmvfc_attrs[] = { | |
85e2399e BK |
2582 | &dev_attr_partition_name, |
2583 | &dev_attr_device_name, | |
2584 | &dev_attr_port_loc_code, | |
2585 | &dev_attr_drc_name, | |
2586 | &dev_attr_npiv_version, | |
2587 | &dev_attr_log_level, | |
072b91f9 BK |
2588 | NULL |
2589 | }; | |
2590 | ||
2591 | static struct scsi_host_template driver_template = { | |
2592 | .module = THIS_MODULE, | |
2593 | .name = "IBM POWER Virtual FC Adapter", | |
2594 | .proc_name = IBMVFC_NAME, | |
2595 | .queuecommand = ibmvfc_queuecommand, | |
2596 | .eh_abort_handler = ibmvfc_eh_abort_handler, | |
2597 | .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, | |
2598 | .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, | |
2599 | .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, | |
2600 | .slave_alloc = ibmvfc_slave_alloc, | |
2601 | .slave_configure = ibmvfc_slave_configure, | |
ad8dcffa | 2602 | .target_alloc = ibmvfc_target_alloc, |
072b91f9 BK |
2603 | .scan_finished = ibmvfc_scan_finished, |
2604 | .change_queue_depth = ibmvfc_change_queue_depth, | |
2605 | .change_queue_type = ibmvfc_change_queue_type, | |
2606 | .cmd_per_lun = 16, | |
2607 | .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, | |
2608 | .this_id = -1, | |
2609 | .sg_tablesize = SG_ALL, | |
2610 | .max_sectors = IBMVFC_MAX_SECTORS, | |
2611 | .use_clustering = ENABLE_CLUSTERING, | |
2612 | .shost_attrs = ibmvfc_attrs, | |
2613 | }; | |
2614 | ||
2615 | /** | |
2616 | * ibmvfc_next_async_crq - Returns the next entry in async queue | |
2617 | * @vhost: ibmvfc host struct | |
2618 | * | |
2619 | * Returns: | |
2620 | * Pointer to next entry in queue / NULL if empty | |
2621 | **/ | |
2622 | static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) | |
2623 | { | |
2624 | struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; | |
2625 | struct ibmvfc_async_crq *crq; | |
2626 | ||
2627 | crq = &async_crq->msgs[async_crq->cur]; | |
2628 | if (crq->valid & 0x80) { | |
2629 | if (++async_crq->cur == async_crq->size) | |
2630 | async_crq->cur = 0; | |
2631 | } else | |
2632 | crq = NULL; | |
2633 | ||
2634 | return crq; | |
2635 | } | |
2636 | ||
2637 | /** | |
2638 | * ibmvfc_next_crq - Returns the next entry in message queue | |
2639 | * @vhost: ibmvfc host struct | |
2640 | * | |
2641 | * Returns: | |
2642 | * Pointer to next entry in queue / NULL if empty | |
2643 | **/ | |
2644 | static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) | |
2645 | { | |
2646 | struct ibmvfc_crq_queue *queue = &vhost->crq; | |
2647 | struct ibmvfc_crq *crq; | |
2648 | ||
2649 | crq = &queue->msgs[queue->cur]; | |
2650 | if (crq->valid & 0x80) { | |
2651 | if (++queue->cur == queue->size) | |
2652 | queue->cur = 0; | |
2653 | } else | |
2654 | crq = NULL; | |
2655 | ||
2656 | return crq; | |
2657 | } | |
2658 | ||
2659 | /** | |
2660 | * ibmvfc_interrupt - Interrupt handler | |
2661 | * @irq: number of irq to handle, not used | |
2662 | * @dev_instance: ibmvfc_host that received interrupt | |
2663 | * | |
2664 | * Returns: | |
2665 | * IRQ_HANDLED | |
2666 | **/ | |
2667 | static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) | |
2668 | { | |
2669 | struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; | |
039a0898 BK |
2670 | unsigned long flags; |
2671 | ||
2672 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2673 | vio_disable_interrupts(to_vio_dev(vhost->dev)); | |
2674 | tasklet_schedule(&vhost->tasklet); | |
2675 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2676 | return IRQ_HANDLED; | |
2677 | } | |
2678 | ||
2679 | /** | |
2680 | * ibmvfc_tasklet - Interrupt handler tasklet | |
2681 | * @data: ibmvfc host struct | |
2682 | * | |
2683 | * Returns: | |
2684 | * Nothing | |
2685 | **/ | |
2686 | static void ibmvfc_tasklet(void *data) | |
2687 | { | |
2688 | struct ibmvfc_host *vhost = data; | |
072b91f9 BK |
2689 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
2690 | struct ibmvfc_crq *crq; | |
2691 | struct ibmvfc_async_crq *async; | |
2692 | unsigned long flags; | |
2693 | int done = 0; | |
2694 | ||
2695 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
072b91f9 BK |
2696 | while (!done) { |
2697 | /* Pull all the valid messages off the CRQ */ | |
2698 | while ((crq = ibmvfc_next_crq(vhost)) != NULL) { | |
2699 | ibmvfc_handle_crq(crq, vhost); | |
2700 | crq->valid = 0; | |
2701 | } | |
2702 | ||
2703 | /* Pull all the valid messages off the async CRQ */ | |
2704 | while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { | |
2705 | ibmvfc_handle_async(async, vhost); | |
2706 | async->valid = 0; | |
2707 | } | |
2708 | ||
2709 | vio_enable_interrupts(vdev); | |
2710 | if ((crq = ibmvfc_next_crq(vhost)) != NULL) { | |
2711 | vio_disable_interrupts(vdev); | |
2712 | ibmvfc_handle_crq(crq, vhost); | |
2713 | crq->valid = 0; | |
2714 | } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { | |
2715 | vio_disable_interrupts(vdev); | |
2716 | ibmvfc_handle_async(async, vhost); | |
4081b77c | 2717 | async->valid = 0; |
072b91f9 BK |
2718 | } else |
2719 | done = 1; | |
2720 | } | |
2721 | ||
2722 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
072b91f9 BK |
2723 | } |
2724 | ||
2725 | /** | |
2726 | * ibmvfc_init_tgt - Set the next init job step for the target | |
2727 | * @tgt: ibmvfc target struct | |
2728 | * @job_step: job step to perform | |
2729 | * | |
2730 | **/ | |
2731 | static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, | |
2732 | void (*job_step) (struct ibmvfc_target *)) | |
2733 | { | |
2734 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); | |
2735 | tgt->job_step = job_step; | |
2736 | wake_up(&tgt->vhost->work_wait_q); | |
2737 | } | |
2738 | ||
2739 | /** | |
2740 | * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization | |
2741 | * @tgt: ibmvfc target struct | |
2742 | * @job_step: initialization job step | |
2743 | * | |
7d0e4622 BK |
2744 | * Returns: 1 if step will be retried / 0 if not |
2745 | * | |
072b91f9 | 2746 | **/ |
7d0e4622 | 2747 | static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, |
072b91f9 BK |
2748 | void (*job_step) (struct ibmvfc_target *)) |
2749 | { | |
1c41fa82 | 2750 | if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { |
072b91f9 BK |
2751 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
2752 | wake_up(&tgt->vhost->work_wait_q); | |
7d0e4622 | 2753 | return 0; |
072b91f9 BK |
2754 | } else |
2755 | ibmvfc_init_tgt(tgt, job_step); | |
7d0e4622 | 2756 | return 1; |
072b91f9 BK |
2757 | } |
2758 | ||
a3b7aeab BK |
2759 | /* Defined in FC-LS */ |
2760 | static const struct { | |
2761 | int code; | |
2762 | int retry; | |
2763 | int logged_in; | |
2764 | } prli_rsp [] = { | |
2765 | { 0, 1, 0 }, | |
2766 | { 1, 0, 1 }, | |
2767 | { 2, 1, 0 }, | |
2768 | { 3, 1, 0 }, | |
2769 | { 4, 0, 0 }, | |
2770 | { 5, 0, 0 }, | |
2771 | { 6, 0, 1 }, | |
2772 | { 7, 0, 0 }, | |
2773 | { 8, 1, 0 }, | |
2774 | }; | |
2775 | ||
2776 | /** | |
2777 | * ibmvfc_get_prli_rsp - Find PRLI response index | |
2778 | * @flags: PRLI response flags | |
2779 | * | |
2780 | **/ | |
2781 | static int ibmvfc_get_prli_rsp(u16 flags) | |
2782 | { | |
2783 | int i; | |
2784 | int code = (flags & 0x0f00) >> 8; | |
2785 | ||
2786 | for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) | |
2787 | if (prli_rsp[i].code == code) | |
2788 | return i; | |
2789 | ||
2790 | return 0; | |
2791 | } | |
2792 | ||
072b91f9 BK |
2793 | /** |
2794 | * ibmvfc_tgt_prli_done - Completion handler for Process Login | |
2795 | * @evt: ibmvfc event struct | |
2796 | * | |
2797 | **/ | |
2798 | static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) | |
2799 | { | |
2800 | struct ibmvfc_target *tgt = evt->tgt; | |
2801 | struct ibmvfc_host *vhost = evt->vhost; | |
2802 | struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; | |
a3b7aeab | 2803 | struct ibmvfc_prli_svc_parms *parms = &rsp->parms; |
072b91f9 | 2804 | u32 status = rsp->common.status; |
7d0e4622 | 2805 | int index, level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
2806 | |
2807 | vhost->discovery_threads--; | |
2808 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
2809 | switch (status) { | |
2810 | case IBMVFC_MAD_SUCCESS: | |
a3b7aeab BK |
2811 | tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", |
2812 | parms->type, parms->flags, parms->service_parms); | |
2813 | ||
2814 | if (parms->type == IBMVFC_SCSI_FCP_TYPE) { | |
2815 | index = ibmvfc_get_prli_rsp(parms->flags); | |
2816 | if (prli_rsp[index].logged_in) { | |
2817 | if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) { | |
2818 | tgt->need_login = 0; | |
2819 | tgt->ids.roles = 0; | |
2820 | if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC) | |
2821 | tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; | |
2822 | if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC) | |
2823 | tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; | |
43c8da90 | 2824 | tgt->add_rport = 1; |
a3b7aeab BK |
2825 | } else |
2826 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
2827 | } else if (prli_rsp[index].retry) | |
2828 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); | |
2829 | else | |
2830 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
2831 | } else | |
2832 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
072b91f9 BK |
2833 | break; |
2834 | case IBMVFC_MAD_DRIVER_FAILED: | |
2835 | break; | |
2836 | case IBMVFC_MAD_CRQ_ERROR: | |
2837 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); | |
2838 | break; | |
2839 | case IBMVFC_MAD_FAILED: | |
2840 | default: | |
072b91f9 | 2841 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
7d0e4622 | 2842 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); |
10e79499 BK |
2843 | else |
2844 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
7d0e4622 BK |
2845 | |
2846 | tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", | |
2847 | ibmvfc_get_cmd_error(rsp->status, rsp->error), | |
2848 | rsp->status, rsp->error, status); | |
072b91f9 BK |
2849 | break; |
2850 | }; | |
2851 | ||
2852 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
2853 | ibmvfc_free_event(evt); | |
2854 | wake_up(&vhost->work_wait_q); | |
2855 | } | |
2856 | ||
2857 | /** | |
2858 | * ibmvfc_tgt_send_prli - Send a process login | |
2859 | * @tgt: ibmvfc target struct | |
2860 | * | |
2861 | **/ | |
2862 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) | |
2863 | { | |
2864 | struct ibmvfc_process_login *prli; | |
2865 | struct ibmvfc_host *vhost = tgt->vhost; | |
2866 | struct ibmvfc_event *evt; | |
2867 | ||
2868 | if (vhost->discovery_threads >= disc_threads) | |
2869 | return; | |
2870 | ||
2871 | kref_get(&tgt->kref); | |
2872 | evt = ibmvfc_get_event(vhost); | |
2873 | vhost->discovery_threads++; | |
2874 | ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); | |
2875 | evt->tgt = tgt; | |
2876 | prli = &evt->iu.prli; | |
2877 | memset(prli, 0, sizeof(*prli)); | |
2878 | prli->common.version = 1; | |
2879 | prli->common.opcode = IBMVFC_PROCESS_LOGIN; | |
2880 | prli->common.length = sizeof(*prli); | |
2881 | prli->scsi_id = tgt->scsi_id; | |
2882 | ||
2883 | prli->parms.type = IBMVFC_SCSI_FCP_TYPE; | |
2884 | prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; | |
2885 | prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; | |
2886 | ||
2887 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
2888 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
2889 | vhost->discovery_threads--; | |
2890 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
2891 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
2892 | } else | |
2893 | tgt_dbg(tgt, "Sent process login\n"); | |
2894 | } | |
2895 | ||
2896 | /** | |
2897 | * ibmvfc_tgt_plogi_done - Completion handler for Port Login | |
2898 | * @evt: ibmvfc event struct | |
2899 | * | |
2900 | **/ | |
2901 | static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) | |
2902 | { | |
2903 | struct ibmvfc_target *tgt = evt->tgt; | |
2904 | struct ibmvfc_host *vhost = evt->vhost; | |
2905 | struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; | |
2906 | u32 status = rsp->common.status; | |
7d0e4622 | 2907 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
2908 | |
2909 | vhost->discovery_threads--; | |
2910 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
2911 | switch (status) { | |
2912 | case IBMVFC_MAD_SUCCESS: | |
2913 | tgt_dbg(tgt, "Port Login succeeded\n"); | |
2914 | if (tgt->ids.port_name && | |
2915 | tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { | |
2916 | vhost->reinit = 1; | |
2917 | tgt_dbg(tgt, "Port re-init required\n"); | |
2918 | break; | |
2919 | } | |
2920 | tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); | |
2921 | tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); | |
2922 | tgt->ids.port_id = tgt->scsi_id; | |
072b91f9 BK |
2923 | memcpy(&tgt->service_parms, &rsp->service_parms, |
2924 | sizeof(tgt->service_parms)); | |
2925 | memcpy(&tgt->service_parms_change, &rsp->service_parms_change, | |
2926 | sizeof(tgt->service_parms_change)); | |
2927 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); | |
2928 | break; | |
2929 | case IBMVFC_MAD_DRIVER_FAILED: | |
2930 | break; | |
2931 | case IBMVFC_MAD_CRQ_ERROR: | |
2932 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); | |
2933 | break; | |
2934 | case IBMVFC_MAD_FAILED: | |
2935 | default: | |
072b91f9 | 2936 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
7d0e4622 | 2937 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
10e79499 BK |
2938 | else |
2939 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
7d0e4622 BK |
2940 | |
2941 | tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", | |
2942 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, | |
2943 | ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, | |
2944 | ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); | |
072b91f9 BK |
2945 | break; |
2946 | }; | |
2947 | ||
2948 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
2949 | ibmvfc_free_event(evt); | |
2950 | wake_up(&vhost->work_wait_q); | |
2951 | } | |
2952 | ||
2953 | /** | |
2954 | * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target | |
2955 | * @tgt: ibmvfc target struct | |
2956 | * | |
2957 | **/ | |
2958 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) | |
2959 | { | |
2960 | struct ibmvfc_port_login *plogi; | |
2961 | struct ibmvfc_host *vhost = tgt->vhost; | |
2962 | struct ibmvfc_event *evt; | |
2963 | ||
2964 | if (vhost->discovery_threads >= disc_threads) | |
2965 | return; | |
2966 | ||
2967 | kref_get(&tgt->kref); | |
2968 | evt = ibmvfc_get_event(vhost); | |
2969 | vhost->discovery_threads++; | |
2970 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
2971 | ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); | |
2972 | evt->tgt = tgt; | |
2973 | plogi = &evt->iu.plogi; | |
2974 | memset(plogi, 0, sizeof(*plogi)); | |
2975 | plogi->common.version = 1; | |
2976 | plogi->common.opcode = IBMVFC_PORT_LOGIN; | |
2977 | plogi->common.length = sizeof(*plogi); | |
2978 | plogi->scsi_id = tgt->scsi_id; | |
2979 | ||
2980 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
2981 | vhost->discovery_threads--; | |
2982 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
2983 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
2984 | } else | |
2985 | tgt_dbg(tgt, "Sent port login\n"); | |
2986 | } | |
2987 | ||
2988 | /** | |
2989 | * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD | |
2990 | * @evt: ibmvfc event struct | |
2991 | * | |
2992 | **/ | |
2993 | static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) | |
2994 | { | |
2995 | struct ibmvfc_target *tgt = evt->tgt; | |
2996 | struct ibmvfc_host *vhost = evt->vhost; | |
2997 | struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; | |
2998 | u32 status = rsp->common.status; | |
2999 | ||
3000 | vhost->discovery_threads--; | |
3001 | ibmvfc_free_event(evt); | |
3002 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3003 | ||
3004 | switch (status) { | |
3005 | case IBMVFC_MAD_SUCCESS: | |
3006 | tgt_dbg(tgt, "Implicit Logout succeeded\n"); | |
3007 | break; | |
3008 | case IBMVFC_MAD_DRIVER_FAILED: | |
3009 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3010 | wake_up(&vhost->work_wait_q); | |
3011 | return; | |
3012 | case IBMVFC_MAD_FAILED: | |
3013 | default: | |
3014 | tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); | |
3015 | break; | |
3016 | }; | |
3017 | ||
3018 | if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) | |
3019 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); | |
3020 | else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && | |
3021 | tgt->scsi_id != tgt->new_scsi_id) | |
3022 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
3023 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3024 | wake_up(&vhost->work_wait_q); | |
3025 | } | |
3026 | ||
3027 | /** | |
3028 | * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target | |
3029 | * @tgt: ibmvfc target struct | |
3030 | * | |
3031 | **/ | |
3032 | static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) | |
3033 | { | |
3034 | struct ibmvfc_implicit_logout *mad; | |
3035 | struct ibmvfc_host *vhost = tgt->vhost; | |
3036 | struct ibmvfc_event *evt; | |
3037 | ||
3038 | if (vhost->discovery_threads >= disc_threads) | |
3039 | return; | |
3040 | ||
3041 | kref_get(&tgt->kref); | |
3042 | evt = ibmvfc_get_event(vhost); | |
3043 | vhost->discovery_threads++; | |
3044 | ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); | |
3045 | evt->tgt = tgt; | |
3046 | mad = &evt->iu.implicit_logout; | |
3047 | memset(mad, 0, sizeof(*mad)); | |
3048 | mad->common.version = 1; | |
3049 | mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; | |
3050 | mad->common.length = sizeof(*mad); | |
3051 | mad->old_scsi_id = tgt->scsi_id; | |
3052 | ||
3053 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
3054 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3055 | vhost->discovery_threads--; | |
3056 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3057 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3058 | } else | |
3059 | tgt_dbg(tgt, "Sent Implicit Logout\n"); | |
3060 | } | |
3061 | ||
989b8545 BK |
3062 | /** |
3063 | * ibmvfc_adisc_needs_plogi - Does device need PLOGI? | |
3064 | * @mad: ibmvfc passthru mad struct | |
3065 | * @tgt: ibmvfc target struct | |
3066 | * | |
3067 | * Returns: | |
3068 | * 1 if PLOGI needed / 0 if PLOGI not needed | |
3069 | **/ | |
3070 | static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, | |
3071 | struct ibmvfc_target *tgt) | |
3072 | { | |
3073 | if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, | |
3074 | sizeof(tgt->ids.port_name))) | |
3075 | return 1; | |
3076 | if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, | |
3077 | sizeof(tgt->ids.node_name))) | |
3078 | return 1; | |
3079 | if (mad->fc_iu.response[6] != tgt->scsi_id) | |
3080 | return 1; | |
3081 | return 0; | |
3082 | } | |
3083 | ||
3084 | /** | |
3085 | * ibmvfc_tgt_adisc_done - Completion handler for ADISC | |
3086 | * @evt: ibmvfc event struct | |
3087 | * | |
3088 | **/ | |
3089 | static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) | |
3090 | { | |
3091 | struct ibmvfc_target *tgt = evt->tgt; | |
3092 | struct ibmvfc_host *vhost = evt->vhost; | |
3093 | struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; | |
3094 | u32 status = mad->common.status; | |
3095 | u8 fc_reason, fc_explain; | |
3096 | ||
3097 | vhost->discovery_threads--; | |
3098 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
10501e1c | 3099 | del_timer(&tgt->timer); |
989b8545 BK |
3100 | |
3101 | switch (status) { | |
3102 | case IBMVFC_MAD_SUCCESS: | |
3103 | tgt_dbg(tgt, "ADISC succeeded\n"); | |
3104 | if (ibmvfc_adisc_needs_plogi(mad, tgt)) | |
3105 | tgt->need_login = 1; | |
3106 | break; | |
3107 | case IBMVFC_MAD_DRIVER_FAILED: | |
3108 | break; | |
3109 | case IBMVFC_MAD_FAILED: | |
3110 | default: | |
3111 | tgt->need_login = 1; | |
3112 | fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; | |
3113 | fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; | |
3114 | tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", | |
3115 | ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), | |
3116 | mad->iu.status, mad->iu.error, | |
3117 | ibmvfc_get_fc_type(fc_reason), fc_reason, | |
3118 | ibmvfc_get_ls_explain(fc_explain), fc_explain, status); | |
3119 | break; | |
3120 | }; | |
3121 | ||
3122 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3123 | ibmvfc_free_event(evt); | |
3124 | wake_up(&vhost->work_wait_q); | |
3125 | } | |
3126 | ||
3127 | /** | |
3128 | * ibmvfc_init_passthru - Initialize an event struct for FC passthru | |
3129 | * @evt: ibmvfc event struct | |
3130 | * | |
3131 | **/ | |
3132 | static void ibmvfc_init_passthru(struct ibmvfc_event *evt) | |
3133 | { | |
3134 | struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; | |
3135 | ||
3136 | memset(mad, 0, sizeof(*mad)); | |
3137 | mad->common.version = 1; | |
3138 | mad->common.opcode = IBMVFC_PASSTHRU; | |
3139 | mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); | |
3140 | mad->cmd_ioba.va = (u64)evt->crq.ioba + | |
3141 | offsetof(struct ibmvfc_passthru_mad, iu); | |
3142 | mad->cmd_ioba.len = sizeof(mad->iu); | |
3143 | mad->iu.cmd_len = sizeof(mad->fc_iu.payload); | |
3144 | mad->iu.rsp_len = sizeof(mad->fc_iu.response); | |
3145 | mad->iu.cmd.va = (u64)evt->crq.ioba + | |
3146 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + | |
3147 | offsetof(struct ibmvfc_passthru_fc_iu, payload); | |
3148 | mad->iu.cmd.len = sizeof(mad->fc_iu.payload); | |
3149 | mad->iu.rsp.va = (u64)evt->crq.ioba + | |
3150 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + | |
3151 | offsetof(struct ibmvfc_passthru_fc_iu, response); | |
3152 | mad->iu.rsp.len = sizeof(mad->fc_iu.response); | |
3153 | } | |
3154 | ||
10501e1c BK |
3155 | /** |
3156 | * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC | |
3157 | * @evt: ibmvfc event struct | |
3158 | * | |
3159 | * Just cleanup this event struct. Everything else is handled by | |
3160 | * the ADISC completion handler. If the ADISC never actually comes | |
3161 | * back, we still have the timer running on the ADISC event struct | |
3162 | * which will fire and cause the CRQ to get reset. | |
3163 | * | |
3164 | **/ | |
3165 | static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) | |
3166 | { | |
3167 | struct ibmvfc_host *vhost = evt->vhost; | |
3168 | struct ibmvfc_target *tgt = evt->tgt; | |
3169 | ||
3170 | tgt_dbg(tgt, "ADISC cancel complete\n"); | |
3171 | vhost->abort_threads--; | |
3172 | ibmvfc_free_event(evt); | |
3173 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3174 | wake_up(&vhost->work_wait_q); | |
3175 | } | |
3176 | ||
3177 | /** | |
3178 | * ibmvfc_adisc_timeout - Handle an ADISC timeout | |
3179 | * @tgt: ibmvfc target struct | |
3180 | * | |
3181 | * If an ADISC times out, send a cancel. If the cancel times | |
3182 | * out, reset the CRQ. When the ADISC comes back as cancelled, | |
3183 | * log back into the target. | |
3184 | **/ | |
3185 | static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) | |
3186 | { | |
3187 | struct ibmvfc_host *vhost = tgt->vhost; | |
3188 | struct ibmvfc_event *evt; | |
3189 | struct ibmvfc_tmf *tmf; | |
3190 | unsigned long flags; | |
3191 | int rc; | |
3192 | ||
3193 | tgt_dbg(tgt, "ADISC timeout\n"); | |
3194 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3195 | if (vhost->abort_threads >= disc_threads || | |
3196 | tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || | |
3197 | vhost->state != IBMVFC_INITIALIZING || | |
3198 | vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { | |
3199 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3200 | return; | |
3201 | } | |
3202 | ||
3203 | vhost->abort_threads++; | |
3204 | kref_get(&tgt->kref); | |
3205 | evt = ibmvfc_get_event(vhost); | |
3206 | ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); | |
3207 | ||
3208 | evt->tgt = tgt; | |
3209 | tmf = &evt->iu.tmf; | |
3210 | memset(tmf, 0, sizeof(*tmf)); | |
3211 | tmf->common.version = 1; | |
3212 | tmf->common.opcode = IBMVFC_TMF_MAD; | |
3213 | tmf->common.length = sizeof(*tmf); | |
3214 | tmf->scsi_id = tgt->scsi_id; | |
3215 | tmf->cancel_key = tgt->cancel_key; | |
3216 | ||
3217 | rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
3218 | ||
3219 | if (rc) { | |
3220 | tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); | |
3221 | vhost->abort_threads--; | |
3222 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3223 | __ibmvfc_reset_host(vhost); | |
3224 | } else | |
3225 | tgt_dbg(tgt, "Attempting to cancel ADISC\n"); | |
3226 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3227 | } | |
3228 | ||
989b8545 BK |
3229 | /** |
3230 | * ibmvfc_tgt_adisc - Initiate an ADISC for specified target | |
3231 | * @tgt: ibmvfc target struct | |
3232 | * | |
10501e1c BK |
3233 | * When sending an ADISC we end up with two timers running. The |
3234 | * first timer is the timer in the ibmvfc target struct. If this | |
3235 | * fires, we send a cancel to the target. The second timer is the | |
3236 | * timer on the ibmvfc event for the ADISC, which is longer. If that | |
3237 | * fires, it means the ADISC timed out and our attempt to cancel it | |
3238 | * also failed, so we need to reset the CRQ. | |
989b8545 BK |
3239 | **/ |
3240 | static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) | |
3241 | { | |
3242 | struct ibmvfc_passthru_mad *mad; | |
3243 | struct ibmvfc_host *vhost = tgt->vhost; | |
3244 | struct ibmvfc_event *evt; | |
3245 | ||
3246 | if (vhost->discovery_threads >= disc_threads) | |
3247 | return; | |
3248 | ||
3249 | kref_get(&tgt->kref); | |
3250 | evt = ibmvfc_get_event(vhost); | |
3251 | vhost->discovery_threads++; | |
3252 | ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); | |
3253 | evt->tgt = tgt; | |
3254 | ||
3255 | ibmvfc_init_passthru(evt); | |
3256 | mad = &evt->iu.passthru; | |
3257 | mad->iu.flags = IBMVFC_FC_ELS; | |
3258 | mad->iu.scsi_id = tgt->scsi_id; | |
10501e1c | 3259 | mad->iu.cancel_key = tgt->cancel_key; |
989b8545 BK |
3260 | |
3261 | mad->fc_iu.payload[0] = IBMVFC_ADISC; | |
3262 | memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, | |
3263 | sizeof(vhost->login_buf->resp.port_name)); | |
3264 | memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, | |
3265 | sizeof(vhost->login_buf->resp.node_name)); | |
3266 | mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; | |
3267 | ||
10501e1c BK |
3268 | if (timer_pending(&tgt->timer)) |
3269 | mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); | |
3270 | else { | |
3271 | tgt->timer.data = (unsigned long) tgt; | |
3272 | tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); | |
3273 | tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; | |
3274 | add_timer(&tgt->timer); | |
3275 | } | |
3276 | ||
989b8545 | 3277 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
10501e1c | 3278 | if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { |
989b8545 | 3279 | vhost->discovery_threads--; |
10501e1c | 3280 | del_timer(&tgt->timer); |
989b8545 BK |
3281 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
3282 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3283 | } else | |
3284 | tgt_dbg(tgt, "Sent ADISC\n"); | |
3285 | } | |
3286 | ||
072b91f9 BK |
3287 | /** |
3288 | * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD | |
3289 | * @evt: ibmvfc event struct | |
3290 | * | |
3291 | **/ | |
3292 | static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) | |
3293 | { | |
3294 | struct ibmvfc_target *tgt = evt->tgt; | |
3295 | struct ibmvfc_host *vhost = evt->vhost; | |
3296 | struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; | |
3297 | u32 status = rsp->common.status; | |
7d0e4622 | 3298 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
3299 | |
3300 | vhost->discovery_threads--; | |
3301 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3302 | switch (status) { | |
3303 | case IBMVFC_MAD_SUCCESS: | |
3304 | tgt_dbg(tgt, "Query Target succeeded\n"); | |
3305 | tgt->new_scsi_id = rsp->scsi_id; | |
3306 | if (rsp->scsi_id != tgt->scsi_id) | |
3307 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); | |
989b8545 BK |
3308 | else |
3309 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); | |
072b91f9 BK |
3310 | break; |
3311 | case IBMVFC_MAD_DRIVER_FAILED: | |
3312 | break; | |
3313 | case IBMVFC_MAD_CRQ_ERROR: | |
3314 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); | |
3315 | break; | |
3316 | case IBMVFC_MAD_FAILED: | |
3317 | default: | |
072b91f9 BK |
3318 | if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && |
3319 | rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && | |
3320 | rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) | |
3321 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
3322 | else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) | |
7d0e4622 | 3323 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); |
10e79499 BK |
3324 | else |
3325 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
7d0e4622 BK |
3326 | |
3327 | tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", | |
3328 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, | |
3329 | ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, | |
3330 | ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); | |
072b91f9 BK |
3331 | break; |
3332 | }; | |
3333 | ||
3334 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3335 | ibmvfc_free_event(evt); | |
3336 | wake_up(&vhost->work_wait_q); | |
3337 | } | |
3338 | ||
3339 | /** | |
3340 | * ibmvfc_tgt_query_target - Initiate a Query Target for specified target | |
3341 | * @tgt: ibmvfc target struct | |
3342 | * | |
3343 | **/ | |
3344 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) | |
3345 | { | |
3346 | struct ibmvfc_query_tgt *query_tgt; | |
3347 | struct ibmvfc_host *vhost = tgt->vhost; | |
3348 | struct ibmvfc_event *evt; | |
3349 | ||
3350 | if (vhost->discovery_threads >= disc_threads) | |
3351 | return; | |
3352 | ||
3353 | kref_get(&tgt->kref); | |
3354 | evt = ibmvfc_get_event(vhost); | |
3355 | vhost->discovery_threads++; | |
3356 | evt->tgt = tgt; | |
3357 | ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); | |
3358 | query_tgt = &evt->iu.query_tgt; | |
3359 | memset(query_tgt, 0, sizeof(*query_tgt)); | |
3360 | query_tgt->common.version = 1; | |
3361 | query_tgt->common.opcode = IBMVFC_QUERY_TARGET; | |
3362 | query_tgt->common.length = sizeof(*query_tgt); | |
3363 | query_tgt->wwpn = tgt->ids.port_name; | |
3364 | ||
3365 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
3366 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3367 | vhost->discovery_threads--; | |
3368 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3369 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3370 | } else | |
3371 | tgt_dbg(tgt, "Sent Query Target\n"); | |
3372 | } | |
3373 | ||
3374 | /** | |
3375 | * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target | |
3376 | * @vhost: ibmvfc host struct | |
3377 | * @scsi_id: SCSI ID to allocate target for | |
3378 | * | |
3379 | * Returns: | |
3380 | * 0 on success / other on failure | |
3381 | **/ | |
3382 | static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) | |
3383 | { | |
3384 | struct ibmvfc_target *tgt; | |
3385 | unsigned long flags; | |
3386 | ||
3387 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3388 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
3389 | if (tgt->scsi_id == scsi_id) { | |
3390 | if (tgt->need_login) | |
3391 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); | |
3392 | goto unlock_out; | |
3393 | } | |
3394 | } | |
3395 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3396 | ||
7270b9bd | 3397 | tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); |
072b91f9 | 3398 | if (!tgt) { |
775a42ec | 3399 | dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", |
072b91f9 BK |
3400 | scsi_id); |
3401 | return -ENOMEM; | |
3402 | } | |
3403 | ||
0883e3b3 | 3404 | memset(tgt, 0, sizeof(*tgt)); |
072b91f9 BK |
3405 | tgt->scsi_id = scsi_id; |
3406 | tgt->new_scsi_id = scsi_id; | |
3407 | tgt->vhost = vhost; | |
3408 | tgt->need_login = 1; | |
10501e1c BK |
3409 | tgt->cancel_key = vhost->task_set++; |
3410 | init_timer(&tgt->timer); | |
072b91f9 BK |
3411 | kref_init(&tgt->kref); |
3412 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); | |
3413 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3414 | list_add_tail(&tgt->queue, &vhost->targets); | |
3415 | ||
3416 | unlock_out: | |
3417 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3418 | return 0; | |
3419 | } | |
3420 | ||
3421 | /** | |
3422 | * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets | |
3423 | * @vhost: ibmvfc host struct | |
3424 | * | |
3425 | * Returns: | |
3426 | * 0 on success / other on failure | |
3427 | **/ | |
3428 | static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) | |
3429 | { | |
3430 | int i, rc; | |
3431 | ||
3432 | for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) | |
3433 | rc = ibmvfc_alloc_target(vhost, | |
3434 | vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); | |
3435 | ||
3436 | return rc; | |
3437 | } | |
3438 | ||
3439 | /** | |
3440 | * ibmvfc_discover_targets_done - Completion handler for discover targets MAD | |
3441 | * @evt: ibmvfc event struct | |
3442 | * | |
3443 | **/ | |
3444 | static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) | |
3445 | { | |
3446 | struct ibmvfc_host *vhost = evt->vhost; | |
3447 | struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; | |
3448 | u32 mad_status = rsp->common.status; | |
7d0e4622 | 3449 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
3450 | |
3451 | switch (mad_status) { | |
3452 | case IBMVFC_MAD_SUCCESS: | |
3453 | ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); | |
3454 | vhost->num_targets = rsp->num_written; | |
3455 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); | |
3456 | break; | |
3457 | case IBMVFC_MAD_FAILED: | |
7d0e4622 BK |
3458 | level += ibmvfc_retry_host_init(vhost); |
3459 | ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", | |
3460 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); | |
072b91f9 BK |
3461 | break; |
3462 | case IBMVFC_MAD_DRIVER_FAILED: | |
3463 | break; | |
3464 | default: | |
3465 | dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); | |
3466 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3467 | break; | |
3468 | } | |
3469 | ||
3470 | ibmvfc_free_event(evt); | |
3471 | wake_up(&vhost->work_wait_q); | |
3472 | } | |
3473 | ||
3474 | /** | |
3475 | * ibmvfc_discover_targets - Send Discover Targets MAD | |
3476 | * @vhost: ibmvfc host struct | |
3477 | * | |
3478 | **/ | |
3479 | static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) | |
3480 | { | |
3481 | struct ibmvfc_discover_targets *mad; | |
3482 | struct ibmvfc_event *evt = ibmvfc_get_event(vhost); | |
3483 | ||
3484 | ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); | |
3485 | mad = &evt->iu.discover_targets; | |
3486 | memset(mad, 0, sizeof(*mad)); | |
3487 | mad->common.version = 1; | |
3488 | mad->common.opcode = IBMVFC_DISC_TARGETS; | |
3489 | mad->common.length = sizeof(*mad); | |
3490 | mad->bufflen = vhost->disc_buf_sz; | |
3491 | mad->buffer.va = vhost->disc_buf_dma; | |
3492 | mad->buffer.len = vhost->disc_buf_sz; | |
3493 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); | |
3494 | ||
3495 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) | |
3496 | ibmvfc_dbg(vhost, "Sent discover targets\n"); | |
3497 | else | |
3498 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3499 | } | |
3500 | ||
3501 | /** | |
3502 | * ibmvfc_npiv_login_done - Completion handler for NPIV Login | |
3503 | * @evt: ibmvfc event struct | |
3504 | * | |
3505 | **/ | |
3506 | static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) | |
3507 | { | |
3508 | struct ibmvfc_host *vhost = evt->vhost; | |
3509 | u32 mad_status = evt->xfer_iu->npiv_login.common.status; | |
3510 | struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; | |
3511 | unsigned int npiv_max_sectors; | |
7d0e4622 | 3512 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
3513 | |
3514 | switch (mad_status) { | |
3515 | case IBMVFC_MAD_SUCCESS: | |
3516 | ibmvfc_free_event(evt); | |
3517 | break; | |
3518 | case IBMVFC_MAD_FAILED: | |
072b91f9 | 3519 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
7d0e4622 | 3520 | level += ibmvfc_retry_host_init(vhost); |
072b91f9 BK |
3521 | else |
3522 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
7d0e4622 BK |
3523 | ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", |
3524 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); | |
072b91f9 BK |
3525 | ibmvfc_free_event(evt); |
3526 | return; | |
3527 | case IBMVFC_MAD_CRQ_ERROR: | |
3528 | ibmvfc_retry_host_init(vhost); | |
3529 | case IBMVFC_MAD_DRIVER_FAILED: | |
3530 | ibmvfc_free_event(evt); | |
3531 | return; | |
3532 | default: | |
3533 | dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); | |
3534 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3535 | ibmvfc_free_event(evt); | |
3536 | return; | |
3537 | } | |
3538 | ||
3539 | vhost->client_migrated = 0; | |
3540 | ||
3541 | if (!(rsp->flags & IBMVFC_NATIVE_FC)) { | |
3542 | dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", | |
3543 | rsp->flags); | |
3544 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3545 | wake_up(&vhost->work_wait_q); | |
3546 | return; | |
3547 | } | |
3548 | ||
3549 | if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { | |
3550 | dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", | |
3551 | rsp->max_cmds); | |
3552 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3553 | wake_up(&vhost->work_wait_q); | |
3554 | return; | |
3555 | } | |
3556 | ||
3557 | npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); | |
3558 | dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", | |
3559 | rsp->partition_name, rsp->device_name, rsp->port_loc_code, | |
3560 | rsp->drc_name, npiv_max_sectors); | |
3561 | ||
3562 | fc_host_fabric_name(vhost->host) = rsp->node_name; | |
3563 | fc_host_node_name(vhost->host) = rsp->node_name; | |
3564 | fc_host_port_name(vhost->host) = rsp->port_name; | |
3565 | fc_host_port_id(vhost->host) = rsp->scsi_id; | |
3566 | fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; | |
3567 | fc_host_supported_classes(vhost->host) = 0; | |
3568 | if (rsp->service_parms.class1_parms[0] & 0x80000000) | |
3569 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; | |
3570 | if (rsp->service_parms.class2_parms[0] & 0x80000000) | |
3571 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; | |
3572 | if (rsp->service_parms.class3_parms[0] & 0x80000000) | |
3573 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; | |
3574 | fc_host_maxframe_size(vhost->host) = | |
3575 | rsp->service_parms.common.bb_rcv_sz & 0x0fff; | |
3576 | ||
3577 | vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; | |
3578 | vhost->host->max_sectors = npiv_max_sectors; | |
3579 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); | |
3580 | wake_up(&vhost->work_wait_q); | |
3581 | } | |
3582 | ||
3583 | /** | |
3584 | * ibmvfc_npiv_login - Sends NPIV login | |
3585 | * @vhost: ibmvfc host struct | |
3586 | * | |
3587 | **/ | |
3588 | static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) | |
3589 | { | |
3590 | struct ibmvfc_npiv_login_mad *mad; | |
3591 | struct ibmvfc_event *evt = ibmvfc_get_event(vhost); | |
3592 | ||
3593 | ibmvfc_gather_partition_info(vhost); | |
3594 | ibmvfc_set_login_info(vhost); | |
3595 | ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); | |
3596 | ||
3597 | memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); | |
3598 | mad = &evt->iu.npiv_login; | |
3599 | memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); | |
3600 | mad->common.version = 1; | |
3601 | mad->common.opcode = IBMVFC_NPIV_LOGIN; | |
3602 | mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); | |
3603 | mad->buffer.va = vhost->login_buf_dma; | |
3604 | mad->buffer.len = sizeof(*vhost->login_buf); | |
3605 | ||
072b91f9 BK |
3606 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
3607 | ||
3608 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) | |
3609 | ibmvfc_dbg(vhost, "Sent NPIV login\n"); | |
3610 | else | |
3611 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3612 | }; | |
3613 | ||
3614 | /** | |
3615 | * ibmvfc_dev_init_to_do - Is there target initialization work to do? | |
3616 | * @vhost: ibmvfc host struct | |
3617 | * | |
3618 | * Returns: | |
3619 | * 1 if work to do / 0 if not | |
3620 | **/ | |
3621 | static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) | |
3622 | { | |
3623 | struct ibmvfc_target *tgt; | |
3624 | ||
3625 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
3626 | if (tgt->action == IBMVFC_TGT_ACTION_INIT || | |
3627 | tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) | |
3628 | return 1; | |
3629 | } | |
3630 | ||
3631 | return 0; | |
3632 | } | |
3633 | ||
3634 | /** | |
3635 | * __ibmvfc_work_to_do - Is there task level work to do? (no locking) | |
3636 | * @vhost: ibmvfc host struct | |
3637 | * | |
3638 | * Returns: | |
3639 | * 1 if work to do / 0 if not | |
3640 | **/ | |
3641 | static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) | |
3642 | { | |
3643 | struct ibmvfc_target *tgt; | |
3644 | ||
3645 | if (kthread_should_stop()) | |
3646 | return 1; | |
3647 | switch (vhost->action) { | |
3648 | case IBMVFC_HOST_ACTION_NONE: | |
3649 | case IBMVFC_HOST_ACTION_INIT_WAIT: | |
3650 | return 0; | |
3651 | case IBMVFC_HOST_ACTION_TGT_INIT: | |
3652 | case IBMVFC_HOST_ACTION_QUERY_TGTS: | |
3653 | if (vhost->discovery_threads == disc_threads) | |
3654 | return 0; | |
3655 | list_for_each_entry(tgt, &vhost->targets, queue) | |
3656 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) | |
3657 | return 1; | |
3658 | list_for_each_entry(tgt, &vhost->targets, queue) | |
3659 | if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) | |
3660 | return 0; | |
3661 | return 1; | |
3662 | case IBMVFC_HOST_ACTION_INIT: | |
3663 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: | |
072b91f9 | 3664 | case IBMVFC_HOST_ACTION_TGT_DEL: |
10e79499 | 3665 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 BK |
3666 | case IBMVFC_HOST_ACTION_QUERY: |
3667 | default: | |
3668 | break; | |
3669 | }; | |
3670 | ||
3671 | return 1; | |
3672 | } | |
3673 | ||
3674 | /** | |
3675 | * ibmvfc_work_to_do - Is there task level work to do? | |
3676 | * @vhost: ibmvfc host struct | |
3677 | * | |
3678 | * Returns: | |
3679 | * 1 if work to do / 0 if not | |
3680 | **/ | |
3681 | static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) | |
3682 | { | |
3683 | unsigned long flags; | |
3684 | int rc; | |
3685 | ||
3686 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3687 | rc = __ibmvfc_work_to_do(vhost); | |
3688 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3689 | return rc; | |
3690 | } | |
3691 | ||
3692 | /** | |
3693 | * ibmvfc_log_ae - Log async events if necessary | |
3694 | * @vhost: ibmvfc host struct | |
3695 | * @events: events to log | |
3696 | * | |
3697 | **/ | |
3698 | static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) | |
3699 | { | |
3700 | if (events & IBMVFC_AE_RSCN) | |
3701 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); | |
3702 | if ((events & IBMVFC_AE_LINKDOWN) && | |
3703 | vhost->state >= IBMVFC_HALTED) | |
3704 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); | |
3705 | if ((events & IBMVFC_AE_LINKUP) && | |
3706 | vhost->state == IBMVFC_INITIALIZING) | |
3707 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); | |
3708 | } | |
3709 | ||
3710 | /** | |
3711 | * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port | |
3712 | * @tgt: ibmvfc target struct | |
3713 | * | |
3714 | **/ | |
3715 | static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) | |
3716 | { | |
3717 | struct ibmvfc_host *vhost = tgt->vhost; | |
43c8da90 | 3718 | struct fc_rport *rport; |
072b91f9 BK |
3719 | unsigned long flags; |
3720 | ||
43c8da90 BK |
3721 | tgt_dbg(tgt, "Adding rport\n"); |
3722 | rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); | |
3723 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3724 | ||
3725 | if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { | |
3726 | tgt_dbg(tgt, "Deleting rport\n"); | |
3727 | list_del(&tgt->queue); | |
0883e3b3 | 3728 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
43c8da90 BK |
3729 | fc_remote_port_delete(rport); |
3730 | del_timer_sync(&tgt->timer); | |
3731 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
0883e3b3 BK |
3732 | return; |
3733 | } | |
3734 | ||
072b91f9 BK |
3735 | if (rport) { |
3736 | tgt_dbg(tgt, "rport add succeeded\n"); | |
43c8da90 | 3737 | tgt->rport = rport; |
072b91f9 BK |
3738 | rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; |
3739 | rport->supported_classes = 0; | |
52d7e861 | 3740 | tgt->target_id = rport->scsi_target_id; |
072b91f9 BK |
3741 | if (tgt->service_parms.class1_parms[0] & 0x80000000) |
3742 | rport->supported_classes |= FC_COS_CLASS1; | |
3743 | if (tgt->service_parms.class2_parms[0] & 0x80000000) | |
3744 | rport->supported_classes |= FC_COS_CLASS2; | |
3745 | if (tgt->service_parms.class3_parms[0] & 0x80000000) | |
3746 | rport->supported_classes |= FC_COS_CLASS3; | |
3747 | } else | |
3748 | tgt_dbg(tgt, "rport add failed\n"); | |
3749 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3750 | } | |
3751 | ||
3752 | /** | |
3753 | * ibmvfc_do_work - Do task level work | |
3754 | * @vhost: ibmvfc host struct | |
3755 | * | |
3756 | **/ | |
3757 | static void ibmvfc_do_work(struct ibmvfc_host *vhost) | |
3758 | { | |
3759 | struct ibmvfc_target *tgt; | |
3760 | unsigned long flags; | |
3761 | struct fc_rport *rport; | |
3762 | ||
3763 | ibmvfc_log_ae(vhost, vhost->events_to_log); | |
3764 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3765 | vhost->events_to_log = 0; | |
3766 | switch (vhost->action) { | |
3767 | case IBMVFC_HOST_ACTION_NONE: | |
3768 | case IBMVFC_HOST_ACTION_INIT_WAIT: | |
3769 | break; | |
3770 | case IBMVFC_HOST_ACTION_INIT: | |
3771 | BUG_ON(vhost->state != IBMVFC_INITIALIZING); | |
1c41fa82 BK |
3772 | if (vhost->delay_init) { |
3773 | vhost->delay_init = 0; | |
3774 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
d2131b33 | 3775 | ssleep(15); |
1c41fa82 BK |
3776 | return; |
3777 | } else | |
3778 | vhost->job_step(vhost); | |
072b91f9 BK |
3779 | break; |
3780 | case IBMVFC_HOST_ACTION_QUERY: | |
3781 | list_for_each_entry(tgt, &vhost->targets, queue) | |
3782 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); | |
3783 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); | |
3784 | break; | |
3785 | case IBMVFC_HOST_ACTION_QUERY_TGTS: | |
3786 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
3787 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) { | |
3788 | tgt->job_step(tgt); | |
3789 | break; | |
3790 | } | |
3791 | } | |
3792 | ||
3793 | if (!ibmvfc_dev_init_to_do(vhost)) | |
3794 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); | |
3795 | break; | |
3796 | case IBMVFC_HOST_ACTION_TGT_DEL: | |
10e79499 | 3797 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 BK |
3798 | list_for_each_entry(tgt, &vhost->targets, queue) { |
3799 | if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { | |
3800 | tgt_dbg(tgt, "Deleting rport\n"); | |
3801 | rport = tgt->rport; | |
3802 | tgt->rport = NULL; | |
3803 | list_del(&tgt->queue); | |
3804 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3805 | if (rport) | |
3806 | fc_remote_port_delete(rport); | |
10501e1c | 3807 | del_timer_sync(&tgt->timer); |
072b91f9 BK |
3808 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
3809 | return; | |
3810 | } | |
3811 | } | |
3812 | ||
3813 | if (vhost->state == IBMVFC_INITIALIZING) { | |
10e79499 | 3814 | if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { |
43c8da90 BK |
3815 | if (vhost->reinit) { |
3816 | vhost->reinit = 0; | |
3817 | scsi_block_requests(vhost->host); | |
3818 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); | |
3819 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3820 | } else { | |
3821 | ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); | |
3822 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); | |
3823 | wake_up(&vhost->init_wait_q); | |
3824 | schedule_work(&vhost->rport_add_work_q); | |
3825 | vhost->init_retries = 0; | |
3826 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3827 | scsi_unblock_requests(vhost->host); | |
3828 | } | |
3829 | ||
10e79499 BK |
3830 | return; |
3831 | } else { | |
3832 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); | |
3833 | vhost->job_step = ibmvfc_discover_targets; | |
3834 | } | |
072b91f9 BK |
3835 | } else { |
3836 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); | |
3837 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3838 | scsi_unblock_requests(vhost->host); | |
3839 | wake_up(&vhost->init_wait_q); | |
3840 | return; | |
3841 | } | |
3842 | break; | |
3843 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: | |
3844 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); | |
3845 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3846 | ibmvfc_alloc_targets(vhost); | |
3847 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3848 | break; | |
3849 | case IBMVFC_HOST_ACTION_TGT_INIT: | |
3850 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
3851 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) { | |
3852 | tgt->job_step(tgt); | |
3853 | break; | |
3854 | } | |
3855 | } | |
3856 | ||
10e79499 BK |
3857 | if (!ibmvfc_dev_init_to_do(vhost)) |
3858 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); | |
072b91f9 | 3859 | break; |
072b91f9 BK |
3860 | default: |
3861 | break; | |
3862 | }; | |
3863 | ||
3864 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3865 | } | |
3866 | ||
3867 | /** | |
3868 | * ibmvfc_work - Do task level work | |
3869 | * @data: ibmvfc host struct | |
3870 | * | |
3871 | * Returns: | |
3872 | * zero | |
3873 | **/ | |
3874 | static int ibmvfc_work(void *data) | |
3875 | { | |
3876 | struct ibmvfc_host *vhost = data; | |
3877 | int rc; | |
3878 | ||
3879 | set_user_nice(current, -20); | |
3880 | ||
3881 | while (1) { | |
3882 | rc = wait_event_interruptible(vhost->work_wait_q, | |
3883 | ibmvfc_work_to_do(vhost)); | |
3884 | ||
3885 | BUG_ON(rc); | |
3886 | ||
3887 | if (kthread_should_stop()) | |
3888 | break; | |
3889 | ||
3890 | ibmvfc_do_work(vhost); | |
3891 | } | |
3892 | ||
3893 | ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); | |
3894 | return 0; | |
3895 | } | |
3896 | ||
3897 | /** | |
3898 | * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor | |
3899 | * @vhost: ibmvfc host struct | |
3900 | * | |
3901 | * Allocates a page for messages, maps it for dma, and registers | |
3902 | * the crq with the hypervisor. | |
3903 | * | |
3904 | * Return value: | |
3905 | * zero on success / other on failure | |
3906 | **/ | |
3907 | static int ibmvfc_init_crq(struct ibmvfc_host *vhost) | |
3908 | { | |
3909 | int rc, retrc = -ENOMEM; | |
3910 | struct device *dev = vhost->dev; | |
3911 | struct vio_dev *vdev = to_vio_dev(dev); | |
3912 | struct ibmvfc_crq_queue *crq = &vhost->crq; | |
3913 | ||
3914 | ENTER; | |
3915 | crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); | |
3916 | ||
3917 | if (!crq->msgs) | |
3918 | return -ENOMEM; | |
3919 | ||
3920 | crq->size = PAGE_SIZE / sizeof(*crq->msgs); | |
3921 | crq->msg_token = dma_map_single(dev, crq->msgs, | |
3922 | PAGE_SIZE, DMA_BIDIRECTIONAL); | |
3923 | ||
8d8bb39b | 3924 | if (dma_mapping_error(dev, crq->msg_token)) |
072b91f9 BK |
3925 | goto map_failed; |
3926 | ||
3927 | retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, | |
3928 | crq->msg_token, PAGE_SIZE); | |
3929 | ||
3930 | if (rc == H_RESOURCE) | |
3931 | /* maybe kexecing and resource is busy. try a reset */ | |
3932 | retrc = rc = ibmvfc_reset_crq(vhost); | |
3933 | ||
3934 | if (rc == H_CLOSED) | |
3935 | dev_warn(dev, "Partner adapter not ready\n"); | |
3936 | else if (rc) { | |
3937 | dev_warn(dev, "Error %d opening adapter\n", rc); | |
3938 | goto reg_crq_failed; | |
3939 | } | |
3940 | ||
3941 | retrc = 0; | |
3942 | ||
039a0898 BK |
3943 | tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); |
3944 | ||
072b91f9 BK |
3945 | if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { |
3946 | dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); | |
3947 | goto req_irq_failed; | |
3948 | } | |
3949 | ||
3950 | if ((rc = vio_enable_interrupts(vdev))) { | |
3951 | dev_err(dev, "Error %d enabling interrupts\n", rc); | |
3952 | goto req_irq_failed; | |
3953 | } | |
3954 | ||
3955 | crq->cur = 0; | |
3956 | LEAVE; | |
3957 | return retrc; | |
3958 | ||
3959 | req_irq_failed: | |
039a0898 | 3960 | tasklet_kill(&vhost->tasklet); |
072b91f9 BK |
3961 | do { |
3962 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); | |
3963 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
3964 | reg_crq_failed: | |
3965 | dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); | |
3966 | map_failed: | |
3967 | free_page((unsigned long)crq->msgs); | |
3968 | return retrc; | |
3969 | } | |
3970 | ||
3971 | /** | |
3972 | * ibmvfc_free_mem - Free memory for vhost | |
3973 | * @vhost: ibmvfc host struct | |
3974 | * | |
3975 | * Return value: | |
3976 | * none | |
3977 | **/ | |
3978 | static void ibmvfc_free_mem(struct ibmvfc_host *vhost) | |
3979 | { | |
3980 | struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; | |
3981 | ||
3982 | ENTER; | |
3983 | mempool_destroy(vhost->tgt_pool); | |
3984 | kfree(vhost->trace); | |
3985 | dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, | |
3986 | vhost->disc_buf_dma); | |
3987 | dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), | |
3988 | vhost->login_buf, vhost->login_buf_dma); | |
3989 | dma_pool_destroy(vhost->sg_pool); | |
3990 | dma_unmap_single(vhost->dev, async_q->msg_token, | |
3991 | async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); | |
3992 | free_page((unsigned long)async_q->msgs); | |
3993 | LEAVE; | |
3994 | } | |
3995 | ||
3996 | /** | |
3997 | * ibmvfc_alloc_mem - Allocate memory for vhost | |
3998 | * @vhost: ibmvfc host struct | |
3999 | * | |
4000 | * Return value: | |
4001 | * 0 on success / non-zero on failure | |
4002 | **/ | |
4003 | static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) | |
4004 | { | |
4005 | struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; | |
4006 | struct device *dev = vhost->dev; | |
4007 | ||
4008 | ENTER; | |
4009 | async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); | |
4010 | if (!async_q->msgs) { | |
4011 | dev_err(dev, "Couldn't allocate async queue.\n"); | |
4012 | goto nomem; | |
4013 | } | |
4014 | ||
4015 | async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); | |
4016 | async_q->msg_token = dma_map_single(dev, async_q->msgs, | |
4017 | async_q->size * sizeof(*async_q->msgs), | |
4018 | DMA_BIDIRECTIONAL); | |
4019 | ||
8d8bb39b | 4020 | if (dma_mapping_error(dev, async_q->msg_token)) { |
072b91f9 BK |
4021 | dev_err(dev, "Failed to map async queue\n"); |
4022 | goto free_async_crq; | |
4023 | } | |
4024 | ||
4025 | vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, | |
4026 | SG_ALL * sizeof(struct srp_direct_buf), | |
4027 | sizeof(struct srp_direct_buf), 0); | |
4028 | ||
4029 | if (!vhost->sg_pool) { | |
4030 | dev_err(dev, "Failed to allocate sg pool\n"); | |
4031 | goto unmap_async_crq; | |
4032 | } | |
4033 | ||
4034 | vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), | |
4035 | &vhost->login_buf_dma, GFP_KERNEL); | |
4036 | ||
4037 | if (!vhost->login_buf) { | |
4038 | dev_err(dev, "Couldn't allocate NPIV login buffer\n"); | |
4039 | goto free_sg_pool; | |
4040 | } | |
4041 | ||
4042 | vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; | |
4043 | vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, | |
4044 | &vhost->disc_buf_dma, GFP_KERNEL); | |
4045 | ||
4046 | if (!vhost->disc_buf) { | |
4047 | dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); | |
4048 | goto free_login_buffer; | |
4049 | } | |
4050 | ||
4051 | vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, | |
4052 | sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); | |
4053 | ||
4054 | if (!vhost->trace) | |
4055 | goto free_disc_buffer; | |
4056 | ||
4057 | vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, | |
4058 | sizeof(struct ibmvfc_target)); | |
4059 | ||
4060 | if (!vhost->tgt_pool) { | |
4061 | dev_err(dev, "Couldn't allocate target memory pool\n"); | |
4062 | goto free_trace; | |
4063 | } | |
4064 | ||
4065 | LEAVE; | |
4066 | return 0; | |
4067 | ||
4068 | free_trace: | |
4069 | kfree(vhost->trace); | |
4070 | free_disc_buffer: | |
4071 | dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, | |
4072 | vhost->disc_buf_dma); | |
4073 | free_login_buffer: | |
4074 | dma_free_coherent(dev, sizeof(*vhost->login_buf), | |
4075 | vhost->login_buf, vhost->login_buf_dma); | |
4076 | free_sg_pool: | |
4077 | dma_pool_destroy(vhost->sg_pool); | |
4078 | unmap_async_crq: | |
4079 | dma_unmap_single(dev, async_q->msg_token, | |
4080 | async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); | |
4081 | free_async_crq: | |
4082 | free_page((unsigned long)async_q->msgs); | |
4083 | nomem: | |
4084 | LEAVE; | |
4085 | return -ENOMEM; | |
4086 | } | |
4087 | ||
43c8da90 BK |
4088 | /** |
4089 | * ibmvfc_rport_add_thread - Worker thread for rport adds | |
4090 | * @work: work struct | |
4091 | * | |
4092 | **/ | |
4093 | static void ibmvfc_rport_add_thread(struct work_struct *work) | |
4094 | { | |
4095 | struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, | |
4096 | rport_add_work_q); | |
4097 | struct ibmvfc_target *tgt; | |
4098 | struct fc_rport *rport; | |
4099 | unsigned long flags; | |
4100 | int did_work; | |
4101 | ||
4102 | ENTER; | |
4103 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4104 | do { | |
4105 | did_work = 0; | |
4106 | if (vhost->state != IBMVFC_ACTIVE) | |
4107 | break; | |
4108 | ||
4109 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
4110 | if (tgt->add_rport) { | |
4111 | did_work = 1; | |
4112 | tgt->add_rport = 0; | |
4113 | kref_get(&tgt->kref); | |
4114 | rport = tgt->rport; | |
4115 | if (!rport) { | |
4116 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4117 | ibmvfc_tgt_add_rport(tgt); | |
4118 | } else if (get_device(&rport->dev)) { | |
4119 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4120 | tgt_dbg(tgt, "Setting rport roles\n"); | |
4121 | fc_remote_port_rolechg(rport, tgt->ids.roles); | |
4122 | put_device(&rport->dev); | |
4123 | } | |
4124 | ||
4125 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4126 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4127 | break; | |
4128 | } | |
4129 | } | |
4130 | } while(did_work); | |
4131 | ||
4132 | if (vhost->state == IBMVFC_ACTIVE) | |
4133 | vhost->scan_complete = 1; | |
4134 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4135 | LEAVE; | |
4136 | } | |
4137 | ||
072b91f9 BK |
4138 | /** |
4139 | * ibmvfc_probe - Adapter hot plug add entry point | |
4140 | * @vdev: vio device struct | |
4141 | * @id: vio device id struct | |
4142 | * | |
4143 | * Return value: | |
4144 | * 0 on success / non-zero on failure | |
4145 | **/ | |
4146 | static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) | |
4147 | { | |
4148 | struct ibmvfc_host *vhost; | |
4149 | struct Scsi_Host *shost; | |
4150 | struct device *dev = &vdev->dev; | |
4151 | int rc = -ENOMEM; | |
4152 | ||
4153 | ENTER; | |
4154 | shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); | |
4155 | if (!shost) { | |
4156 | dev_err(dev, "Couldn't allocate host data\n"); | |
4157 | goto out; | |
4158 | } | |
4159 | ||
4160 | shost->transportt = ibmvfc_transport_template; | |
4161 | shost->can_queue = max_requests; | |
4162 | shost->max_lun = max_lun; | |
4163 | shost->max_id = max_targets; | |
4164 | shost->max_sectors = IBMVFC_MAX_SECTORS; | |
4165 | shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; | |
4166 | shost->unique_id = shost->host_no; | |
4167 | ||
4168 | vhost = shost_priv(shost); | |
4169 | INIT_LIST_HEAD(&vhost->sent); | |
4170 | INIT_LIST_HEAD(&vhost->free); | |
4171 | INIT_LIST_HEAD(&vhost->targets); | |
4172 | sprintf(vhost->name, IBMVFC_NAME); | |
4173 | vhost->host = shost; | |
4174 | vhost->dev = dev; | |
4175 | vhost->partition_number = -1; | |
4176 | vhost->log_level = log_level; | |
10501e1c | 4177 | vhost->task_set = 1; |
072b91f9 BK |
4178 | strcpy(vhost->partition_name, "UNKNOWN"); |
4179 | init_waitqueue_head(&vhost->work_wait_q); | |
4180 | init_waitqueue_head(&vhost->init_wait_q); | |
43c8da90 | 4181 | INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); |
072b91f9 BK |
4182 | |
4183 | if ((rc = ibmvfc_alloc_mem(vhost))) | |
4184 | goto free_scsi_host; | |
4185 | ||
4186 | vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, | |
4187 | shost->host_no); | |
4188 | ||
4189 | if (IS_ERR(vhost->work_thread)) { | |
4190 | dev_err(dev, "Couldn't create kernel thread: %ld\n", | |
4191 | PTR_ERR(vhost->work_thread)); | |
4192 | goto free_host_mem; | |
4193 | } | |
4194 | ||
4195 | if ((rc = ibmvfc_init_crq(vhost))) { | |
4196 | dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); | |
4197 | goto kill_kthread; | |
4198 | } | |
4199 | ||
4200 | if ((rc = ibmvfc_init_event_pool(vhost))) { | |
4201 | dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); | |
4202 | goto release_crq; | |
4203 | } | |
4204 | ||
4205 | if ((rc = scsi_add_host(shost, dev))) | |
4206 | goto release_event_pool; | |
4207 | ||
4208 | if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, | |
4209 | &ibmvfc_trace_attr))) { | |
4210 | dev_err(dev, "Failed to create trace file. rc=%d\n", rc); | |
4211 | goto remove_shost; | |
4212 | } | |
4213 | ||
4214 | dev_set_drvdata(dev, vhost); | |
4215 | spin_lock(&ibmvfc_driver_lock); | |
4216 | list_add_tail(&vhost->queue, &ibmvfc_head); | |
4217 | spin_unlock(&ibmvfc_driver_lock); | |
4218 | ||
4219 | ibmvfc_send_crq_init(vhost); | |
4220 | scsi_scan_host(shost); | |
4221 | return 0; | |
4222 | ||
4223 | remove_shost: | |
4224 | scsi_remove_host(shost); | |
4225 | release_event_pool: | |
4226 | ibmvfc_free_event_pool(vhost); | |
4227 | release_crq: | |
4228 | ibmvfc_release_crq_queue(vhost); | |
4229 | kill_kthread: | |
4230 | kthread_stop(vhost->work_thread); | |
4231 | free_host_mem: | |
4232 | ibmvfc_free_mem(vhost); | |
4233 | free_scsi_host: | |
4234 | scsi_host_put(shost); | |
4235 | out: | |
4236 | LEAVE; | |
4237 | return rc; | |
4238 | } | |
4239 | ||
4240 | /** | |
4241 | * ibmvfc_remove - Adapter hot plug remove entry point | |
4242 | * @vdev: vio device struct | |
4243 | * | |
4244 | * Return value: | |
4245 | * 0 | |
4246 | **/ | |
4247 | static int ibmvfc_remove(struct vio_dev *vdev) | |
4248 | { | |
4249 | struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); | |
4250 | unsigned long flags; | |
4251 | ||
4252 | ENTER; | |
4253 | ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); | |
2d0da2a4 BK |
4254 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
4255 | ibmvfc_wait_while_resetting(vhost); | |
4256 | ibmvfc_release_crq_queue(vhost); | |
072b91f9 BK |
4257 | kthread_stop(vhost->work_thread); |
4258 | fc_remove_host(vhost->host); | |
4259 | scsi_remove_host(vhost->host); | |
072b91f9 BK |
4260 | |
4261 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4262 | ibmvfc_purge_requests(vhost, DID_ERROR); | |
4263 | ibmvfc_free_event_pool(vhost); | |
4264 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4265 | ||
4266 | ibmvfc_free_mem(vhost); | |
4267 | spin_lock(&ibmvfc_driver_lock); | |
4268 | list_del(&vhost->queue); | |
4269 | spin_unlock(&ibmvfc_driver_lock); | |
4270 | scsi_host_put(vhost->host); | |
4271 | LEAVE; | |
4272 | return 0; | |
4273 | } | |
4274 | ||
39c1ffec BK |
4275 | /** |
4276 | * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver | |
4277 | * @vdev: vio device struct | |
4278 | * | |
4279 | * Return value: | |
4280 | * Number of bytes the driver will need to DMA map at the same time in | |
4281 | * order to perform well. | |
4282 | */ | |
4283 | static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) | |
4284 | { | |
4285 | unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); | |
4286 | return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); | |
4287 | } | |
4288 | ||
072b91f9 BK |
4289 | static struct vio_device_id ibmvfc_device_table[] __devinitdata = { |
4290 | {"fcp", "IBM,vfc-client"}, | |
4291 | { "", "" } | |
4292 | }; | |
4293 | MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); | |
4294 | ||
4295 | static struct vio_driver ibmvfc_driver = { | |
4296 | .id_table = ibmvfc_device_table, | |
4297 | .probe = ibmvfc_probe, | |
4298 | .remove = ibmvfc_remove, | |
39c1ffec | 4299 | .get_desired_dma = ibmvfc_get_desired_dma, |
072b91f9 BK |
4300 | .driver = { |
4301 | .name = IBMVFC_NAME, | |
4302 | .owner = THIS_MODULE, | |
4303 | } | |
4304 | }; | |
4305 | ||
4306 | static struct fc_function_template ibmvfc_transport_functions = { | |
4307 | .show_host_fabric_name = 1, | |
4308 | .show_host_node_name = 1, | |
4309 | .show_host_port_name = 1, | |
4310 | .show_host_supported_classes = 1, | |
4311 | .show_host_port_type = 1, | |
4312 | .show_host_port_id = 1, | |
9ab3610f | 4313 | .show_host_maxframe_size = 1, |
072b91f9 BK |
4314 | |
4315 | .get_host_port_state = ibmvfc_get_host_port_state, | |
4316 | .show_host_port_state = 1, | |
4317 | ||
4318 | .get_host_speed = ibmvfc_get_host_speed, | |
4319 | .show_host_speed = 1, | |
4320 | ||
4321 | .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, | |
4322 | .terminate_rport_io = ibmvfc_terminate_rport_io, | |
4323 | ||
4324 | .show_rport_maxframe_size = 1, | |
4325 | .show_rport_supported_classes = 1, | |
4326 | ||
4327 | .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, | |
4328 | .show_rport_dev_loss_tmo = 1, | |
4329 | ||
4330 | .get_starget_node_name = ibmvfc_get_starget_node_name, | |
4331 | .show_starget_node_name = 1, | |
4332 | ||
4333 | .get_starget_port_name = ibmvfc_get_starget_port_name, | |
4334 | .show_starget_port_name = 1, | |
4335 | ||
4336 | .get_starget_port_id = ibmvfc_get_starget_port_id, | |
4337 | .show_starget_port_id = 1, | |
4338 | }; | |
4339 | ||
4340 | /** | |
4341 | * ibmvfc_module_init - Initialize the ibmvfc module | |
4342 | * | |
4343 | * Return value: | |
4344 | * 0 on success / other on failure | |
4345 | **/ | |
4346 | static int __init ibmvfc_module_init(void) | |
4347 | { | |
4348 | int rc; | |
4349 | ||
4350 | if (!firmware_has_feature(FW_FEATURE_VIO)) | |
4351 | return -ENODEV; | |
4352 | ||
4353 | printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", | |
4354 | IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); | |
4355 | ||
4356 | ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); | |
4357 | if (!ibmvfc_transport_template) | |
4358 | return -ENOMEM; | |
4359 | ||
4360 | rc = vio_register_driver(&ibmvfc_driver); | |
4361 | if (rc) | |
4362 | fc_release_transport(ibmvfc_transport_template); | |
4363 | return rc; | |
4364 | } | |
4365 | ||
4366 | /** | |
4367 | * ibmvfc_module_exit - Teardown the ibmvfc module | |
4368 | * | |
4369 | * Return value: | |
4370 | * nothing | |
4371 | **/ | |
4372 | static void __exit ibmvfc_module_exit(void) | |
4373 | { | |
4374 | vio_unregister_driver(&ibmvfc_driver); | |
4375 | fc_release_transport(ibmvfc_transport_template); | |
4376 | } | |
4377 | ||
4378 | module_init(ibmvfc_module_init); | |
4379 | module_exit(ibmvfc_module_exit); |