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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> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
072b91f9 | 32 | #include <linux/of.h> |
b0f4d4cf | 33 | #include <linux/pm.h> |
072b91f9 | 34 | #include <linux/stringify.h> |
75cc8cfc | 35 | #include <linux/bsg-lib.h> |
072b91f9 BK |
36 | #include <asm/firmware.h> |
37 | #include <asm/irq.h> | |
38 | #include <asm/vio.h> | |
39 | #include <scsi/scsi.h> | |
40 | #include <scsi/scsi_cmnd.h> | |
41 | #include <scsi/scsi_host.h> | |
42 | #include <scsi/scsi_device.h> | |
43 | #include <scsi/scsi_tcq.h> | |
44 | #include <scsi/scsi_transport_fc.h> | |
d31429e1 | 45 | #include <scsi/scsi_bsg_fc.h> |
072b91f9 BK |
46 | #include "ibmvfc.h" |
47 | ||
48 | static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; | |
49 | static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; | |
1abf635d | 50 | static u64 max_lun = IBMVFC_MAX_LUN; |
072b91f9 BK |
51 | static unsigned int max_targets = IBMVFC_MAX_TARGETS; |
52 | static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; | |
53 | static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; | |
072b91f9 BK |
54 | static unsigned int ibmvfc_debug = IBMVFC_DEBUG; |
55 | static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; | |
a6104b1e | 56 | static unsigned int cls3_error = IBMVFC_CLS3_ERROR; |
072b91f9 BK |
57 | static LIST_HEAD(ibmvfc_head); |
58 | static DEFINE_SPINLOCK(ibmvfc_driver_lock); | |
59 | static struct scsi_transport_template *ibmvfc_transport_template; | |
60 | ||
61 | MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); | |
62 | MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); | |
63 | MODULE_LICENSE("GPL"); | |
64 | MODULE_VERSION(IBMVFC_DRIVER_VERSION); | |
65 | ||
66 | module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); | |
67 | MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " | |
68 | "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); | |
69 | module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); | |
70 | MODULE_PARM_DESC(default_timeout, | |
71 | "Default timeout in seconds for initialization and EH commands. " | |
72 | "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); | |
73 | module_param_named(max_requests, max_requests, uint, S_IRUGO); | |
74 | MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " | |
75 | "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); | |
1abf635d | 76 | module_param_named(max_lun, max_lun, ullong, S_IRUGO); |
072b91f9 BK |
77 | MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " |
78 | "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); | |
79 | module_param_named(max_targets, max_targets, uint, S_IRUGO); | |
80 | MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " | |
81 | "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); | |
545ef9a2 | 82 | module_param_named(disc_threads, disc_threads, uint, S_IRUGO); |
072b91f9 BK |
83 | MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " |
84 | "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); | |
85 | module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); | |
86 | MODULE_PARM_DESC(debug, "Enable driver debug information. " | |
87 | "[Default=" __stringify(IBMVFC_DEBUG) "]"); | |
072b91f9 BK |
88 | module_param_named(log_level, log_level, uint, 0); |
89 | MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " | |
90 | "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); | |
a6104b1e | 91 | module_param_named(cls3_error, cls3_error, uint, 0); |
6c46301f | 92 | MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. " |
a6104b1e | 93 | "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]"); |
072b91f9 BK |
94 | |
95 | static const struct { | |
96 | u16 status; | |
97 | u16 error; | |
98 | u8 result; | |
99 | u8 retry; | |
100 | int log; | |
101 | char *name; | |
102 | } cmd_status [] = { | |
103 | { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, | |
104 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, | |
105 | { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, | |
752b3232 | 106 | { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, |
072b91f9 BK |
107 | { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, |
108 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, | |
109 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, | |
110 | { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, | |
111 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, | |
112 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, | |
113 | { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, | |
114 | { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, | |
497f9c50 | 115 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, |
072b91f9 BK |
116 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, |
117 | ||
118 | { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, | |
119 | { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, | |
752b3232 BK |
120 | { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, |
121 | { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, | |
072b91f9 | 122 | { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, |
752b3232 BK |
123 | { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, |
124 | { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, | |
072b91f9 | 125 | { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, |
646d3857 | 126 | { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, |
072b91f9 BK |
127 | { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, |
128 | ||
129 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, | |
130 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, | |
131 | { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, | |
132 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, | |
133 | { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, | |
134 | { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, | |
135 | { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, | |
136 | { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, | |
137 | { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, | |
138 | { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, | |
139 | { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, | |
140 | ||
141 | { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, | |
142 | }; | |
143 | ||
144 | static void ibmvfc_npiv_login(struct ibmvfc_host *); | |
145 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); | |
146 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); | |
147 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *); | |
79111d08 | 148 | static void ibmvfc_npiv_logout(struct ibmvfc_host *); |
072b91f9 BK |
149 | |
150 | static const char *unknown_error = "unknown error"; | |
151 | ||
152 | #ifdef CONFIG_SCSI_IBMVFC_TRACE | |
153 | /** | |
154 | * ibmvfc_trc_start - Log a start trace entry | |
155 | * @evt: ibmvfc event struct | |
156 | * | |
157 | **/ | |
158 | static void ibmvfc_trc_start(struct ibmvfc_event *evt) | |
159 | { | |
160 | struct ibmvfc_host *vhost = evt->vhost; | |
161 | struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; | |
162 | struct ibmvfc_mad_common *mad = &evt->iu.mad_common; | |
163 | struct ibmvfc_trace_entry *entry; | |
164 | ||
165 | entry = &vhost->trace[vhost->trace_index++]; | |
166 | entry->evt = evt; | |
167 | entry->time = jiffies; | |
168 | entry->fmt = evt->crq.format; | |
169 | entry->type = IBMVFC_TRC_START; | |
170 | ||
171 | switch (entry->fmt) { | |
172 | case IBMVFC_CMD_FORMAT: | |
173 | entry->op_code = vfc_cmd->iu.cdb[0]; | |
0aab6c3f | 174 | entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); |
072b91f9 BK |
175 | entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); |
176 | entry->tmf_flags = vfc_cmd->iu.tmf_flags; | |
0aab6c3f | 177 | entry->u.start.xfer_len = be32_to_cpu(vfc_cmd->iu.xfer_len); |
072b91f9 BK |
178 | break; |
179 | case IBMVFC_MAD_FORMAT: | |
0aab6c3f | 180 | entry->op_code = be32_to_cpu(mad->opcode); |
072b91f9 BK |
181 | break; |
182 | default: | |
183 | break; | |
f36cfe6a | 184 | } |
072b91f9 BK |
185 | } |
186 | ||
187 | /** | |
188 | * ibmvfc_trc_end - Log an end trace entry | |
189 | * @evt: ibmvfc event struct | |
190 | * | |
191 | **/ | |
192 | static void ibmvfc_trc_end(struct ibmvfc_event *evt) | |
193 | { | |
194 | struct ibmvfc_host *vhost = evt->vhost; | |
195 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
196 | struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; | |
197 | struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; | |
198 | ||
199 | entry->evt = evt; | |
200 | entry->time = jiffies; | |
201 | entry->fmt = evt->crq.format; | |
202 | entry->type = IBMVFC_TRC_END; | |
203 | ||
204 | switch (entry->fmt) { | |
205 | case IBMVFC_CMD_FORMAT: | |
206 | entry->op_code = vfc_cmd->iu.cdb[0]; | |
0aab6c3f | 207 | entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); |
072b91f9 BK |
208 | entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); |
209 | entry->tmf_flags = vfc_cmd->iu.tmf_flags; | |
0aab6c3f TD |
210 | entry->u.end.status = be16_to_cpu(vfc_cmd->status); |
211 | entry->u.end.error = be16_to_cpu(vfc_cmd->error); | |
072b91f9 BK |
212 | entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; |
213 | entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; | |
214 | entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; | |
215 | break; | |
216 | case IBMVFC_MAD_FORMAT: | |
0aab6c3f TD |
217 | entry->op_code = be32_to_cpu(mad->opcode); |
218 | entry->u.end.status = be16_to_cpu(mad->status); | |
072b91f9 BK |
219 | break; |
220 | default: | |
221 | break; | |
222 | ||
f36cfe6a | 223 | } |
072b91f9 BK |
224 | } |
225 | ||
226 | #else | |
227 | #define ibmvfc_trc_start(evt) do { } while (0) | |
228 | #define ibmvfc_trc_end(evt) do { } while (0) | |
229 | #endif | |
230 | ||
231 | /** | |
232 | * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response | |
233 | * @status: status / error class | |
234 | * @error: error | |
235 | * | |
236 | * Return value: | |
237 | * index into cmd_status / -EINVAL on failure | |
238 | **/ | |
239 | static int ibmvfc_get_err_index(u16 status, u16 error) | |
240 | { | |
241 | int i; | |
242 | ||
243 | for (i = 0; i < ARRAY_SIZE(cmd_status); i++) | |
244 | if ((cmd_status[i].status & status) == cmd_status[i].status && | |
245 | cmd_status[i].error == error) | |
246 | return i; | |
247 | ||
248 | return -EINVAL; | |
249 | } | |
250 | ||
251 | /** | |
252 | * ibmvfc_get_cmd_error - Find the error description for the fcp response | |
253 | * @status: status / error class | |
254 | * @error: error | |
255 | * | |
256 | * Return value: | |
257 | * error description string | |
258 | **/ | |
259 | static const char *ibmvfc_get_cmd_error(u16 status, u16 error) | |
260 | { | |
261 | int rc = ibmvfc_get_err_index(status, error); | |
262 | if (rc >= 0) | |
263 | return cmd_status[rc].name; | |
264 | return unknown_error; | |
265 | } | |
266 | ||
267 | /** | |
268 | * ibmvfc_get_err_result - Find the scsi status to return for the fcp response | |
269 | * @vfc_cmd: ibmvfc command struct | |
270 | * | |
271 | * Return value: | |
272 | * SCSI result value to return for completed command | |
273 | **/ | |
274 | static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) | |
275 | { | |
276 | int err; | |
277 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; | |
0aab6c3f | 278 | int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len); |
072b91f9 BK |
279 | |
280 | if ((rsp->flags & FCP_RSP_LEN_VALID) && | |
4a2837d4 | 281 | ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || |
072b91f9 BK |
282 | rsp->data.info.rsp_code)) |
283 | return DID_ERROR << 16; | |
284 | ||
0aab6c3f | 285 | err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); |
072b91f9 BK |
286 | if (err >= 0) |
287 | return rsp->scsi_status | (cmd_status[err].result << 16); | |
288 | return rsp->scsi_status | (DID_ERROR << 16); | |
289 | } | |
290 | ||
291 | /** | |
292 | * ibmvfc_retry_cmd - Determine if error status is retryable | |
293 | * @status: status / error class | |
294 | * @error: error | |
295 | * | |
296 | * Return value: | |
297 | * 1 if error should be retried / 0 if it should not | |
298 | **/ | |
299 | static int ibmvfc_retry_cmd(u16 status, u16 error) | |
300 | { | |
301 | int rc = ibmvfc_get_err_index(status, error); | |
302 | ||
303 | if (rc >= 0) | |
304 | return cmd_status[rc].retry; | |
305 | return 1; | |
306 | } | |
307 | ||
308 | static const char *unknown_fc_explain = "unknown fc explain"; | |
309 | ||
310 | static const struct { | |
311 | u16 fc_explain; | |
312 | char *name; | |
313 | } ls_explain [] = { | |
314 | { 0x00, "no additional explanation" }, | |
315 | { 0x01, "service parameter error - options" }, | |
316 | { 0x03, "service parameter error - initiator control" }, | |
317 | { 0x05, "service parameter error - recipient control" }, | |
318 | { 0x07, "service parameter error - received data field size" }, | |
319 | { 0x09, "service parameter error - concurrent seq" }, | |
320 | { 0x0B, "service parameter error - credit" }, | |
321 | { 0x0D, "invalid N_Port/F_Port_Name" }, | |
322 | { 0x0E, "invalid node/Fabric Name" }, | |
323 | { 0x0F, "invalid common service parameters" }, | |
324 | { 0x11, "invalid association header" }, | |
325 | { 0x13, "association header required" }, | |
326 | { 0x15, "invalid originator S_ID" }, | |
327 | { 0x17, "invalid OX_ID-RX-ID combination" }, | |
328 | { 0x19, "command (request) already in progress" }, | |
329 | { 0x1E, "N_Port Login requested" }, | |
330 | { 0x1F, "Invalid N_Port_ID" }, | |
331 | }; | |
332 | ||
333 | static const struct { | |
334 | u16 fc_explain; | |
335 | char *name; | |
336 | } gs_explain [] = { | |
337 | { 0x00, "no additional explanation" }, | |
338 | { 0x01, "port identifier not registered" }, | |
339 | { 0x02, "port name not registered" }, | |
340 | { 0x03, "node name not registered" }, | |
341 | { 0x04, "class of service not registered" }, | |
342 | { 0x06, "initial process associator not registered" }, | |
343 | { 0x07, "FC-4 TYPEs not registered" }, | |
344 | { 0x08, "symbolic port name not registered" }, | |
345 | { 0x09, "symbolic node name not registered" }, | |
346 | { 0x0A, "port type not registered" }, | |
347 | { 0xF0, "authorization exception" }, | |
348 | { 0xF1, "authentication exception" }, | |
349 | { 0xF2, "data base full" }, | |
350 | { 0xF3, "data base empty" }, | |
351 | { 0xF4, "processing request" }, | |
352 | { 0xF5, "unable to verify connection" }, | |
353 | { 0xF6, "devices not in a common zone" }, | |
354 | }; | |
355 | ||
356 | /** | |
357 | * ibmvfc_get_ls_explain - Return the FC Explain description text | |
358 | * @status: FC Explain status | |
359 | * | |
360 | * Returns: | |
361 | * error string | |
362 | **/ | |
363 | static const char *ibmvfc_get_ls_explain(u16 status) | |
364 | { | |
365 | int i; | |
366 | ||
367 | for (i = 0; i < ARRAY_SIZE(ls_explain); i++) | |
368 | if (ls_explain[i].fc_explain == status) | |
369 | return ls_explain[i].name; | |
370 | ||
371 | return unknown_fc_explain; | |
372 | } | |
373 | ||
374 | /** | |
375 | * ibmvfc_get_gs_explain - Return the FC Explain description text | |
376 | * @status: FC Explain status | |
377 | * | |
378 | * Returns: | |
379 | * error string | |
380 | **/ | |
381 | static const char *ibmvfc_get_gs_explain(u16 status) | |
382 | { | |
383 | int i; | |
384 | ||
385 | for (i = 0; i < ARRAY_SIZE(gs_explain); i++) | |
386 | if (gs_explain[i].fc_explain == status) | |
387 | return gs_explain[i].name; | |
388 | ||
389 | return unknown_fc_explain; | |
390 | } | |
391 | ||
392 | static const struct { | |
393 | enum ibmvfc_fc_type fc_type; | |
394 | char *name; | |
395 | } fc_type [] = { | |
396 | { IBMVFC_FABRIC_REJECT, "fabric reject" }, | |
397 | { IBMVFC_PORT_REJECT, "port reject" }, | |
398 | { IBMVFC_LS_REJECT, "ELS reject" }, | |
399 | { IBMVFC_FABRIC_BUSY, "fabric busy" }, | |
400 | { IBMVFC_PORT_BUSY, "port busy" }, | |
401 | { IBMVFC_BASIC_REJECT, "basic reject" }, | |
402 | }; | |
403 | ||
404 | static const char *unknown_fc_type = "unknown fc type"; | |
405 | ||
406 | /** | |
407 | * ibmvfc_get_fc_type - Return the FC Type description text | |
408 | * @status: FC Type error status | |
409 | * | |
410 | * Returns: | |
411 | * error string | |
412 | **/ | |
413 | static const char *ibmvfc_get_fc_type(u16 status) | |
414 | { | |
415 | int i; | |
416 | ||
417 | for (i = 0; i < ARRAY_SIZE(fc_type); i++) | |
418 | if (fc_type[i].fc_type == status) | |
419 | return fc_type[i].name; | |
420 | ||
421 | return unknown_fc_type; | |
422 | } | |
423 | ||
424 | /** | |
425 | * ibmvfc_set_tgt_action - Set the next init action for the target | |
426 | * @tgt: ibmvfc target struct | |
427 | * @action: action to perform | |
428 | * | |
429 | **/ | |
430 | static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, | |
431 | enum ibmvfc_target_action action) | |
432 | { | |
433 | switch (tgt->action) { | |
434 | case IBMVFC_TGT_ACTION_DEL_RPORT: | |
d5da3040 BK |
435 | if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) |
436 | tgt->action = action; | |
437 | case IBMVFC_TGT_ACTION_DELETED_RPORT: | |
072b91f9 BK |
438 | break; |
439 | default: | |
43c8da90 BK |
440 | if (action == IBMVFC_TGT_ACTION_DEL_RPORT) |
441 | tgt->add_rport = 0; | |
072b91f9 BK |
442 | tgt->action = action; |
443 | break; | |
444 | } | |
445 | } | |
446 | ||
447 | /** | |
448 | * ibmvfc_set_host_state - Set the state for the host | |
449 | * @vhost: ibmvfc host struct | |
450 | * @state: state to set host to | |
451 | * | |
452 | * Returns: | |
453 | * 0 if state changed / non-zero if not changed | |
454 | **/ | |
455 | static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, | |
456 | enum ibmvfc_host_state state) | |
457 | { | |
458 | int rc = 0; | |
459 | ||
460 | switch (vhost->state) { | |
461 | case IBMVFC_HOST_OFFLINE: | |
462 | rc = -EINVAL; | |
463 | break; | |
464 | default: | |
465 | vhost->state = state; | |
466 | break; | |
f36cfe6a | 467 | } |
072b91f9 BK |
468 | |
469 | return rc; | |
470 | } | |
471 | ||
472 | /** | |
473 | * ibmvfc_set_host_action - Set the next init action for the host | |
474 | * @vhost: ibmvfc host struct | |
475 | * @action: action to perform | |
476 | * | |
477 | **/ | |
478 | static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, | |
479 | enum ibmvfc_host_action action) | |
480 | { | |
481 | switch (action) { | |
482 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: | |
483 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) | |
484 | vhost->action = action; | |
485 | break; | |
79111d08 BK |
486 | case IBMVFC_HOST_ACTION_LOGO_WAIT: |
487 | if (vhost->action == IBMVFC_HOST_ACTION_LOGO) | |
488 | vhost->action = action; | |
489 | break; | |
072b91f9 BK |
490 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
491 | if (vhost->action == IBMVFC_HOST_ACTION_INIT) | |
492 | vhost->action = action; | |
493 | break; | |
494 | case IBMVFC_HOST_ACTION_QUERY: | |
495 | switch (vhost->action) { | |
496 | case IBMVFC_HOST_ACTION_INIT_WAIT: | |
497 | case IBMVFC_HOST_ACTION_NONE: | |
43c8da90 | 498 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 BK |
499 | vhost->action = action; |
500 | break; | |
501 | default: | |
502 | break; | |
f36cfe6a | 503 | } |
072b91f9 BK |
504 | break; |
505 | case IBMVFC_HOST_ACTION_TGT_INIT: | |
506 | if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) | |
507 | vhost->action = action; | |
508 | break; | |
509 | case IBMVFC_HOST_ACTION_INIT: | |
510 | case IBMVFC_HOST_ACTION_TGT_DEL: | |
73ee5d86 BK |
511 | switch (vhost->action) { |
512 | case IBMVFC_HOST_ACTION_RESET: | |
513 | case IBMVFC_HOST_ACTION_REENABLE: | |
514 | break; | |
515 | default: | |
516 | vhost->action = action; | |
517 | break; | |
f36cfe6a | 518 | } |
73ee5d86 BK |
519 | break; |
520 | case IBMVFC_HOST_ACTION_LOGO: | |
072b91f9 | 521 | case IBMVFC_HOST_ACTION_QUERY_TGTS: |
10e79499 | 522 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 | 523 | case IBMVFC_HOST_ACTION_NONE: |
73ee5d86 BK |
524 | case IBMVFC_HOST_ACTION_RESET: |
525 | case IBMVFC_HOST_ACTION_REENABLE: | |
072b91f9 BK |
526 | default: |
527 | vhost->action = action; | |
528 | break; | |
f36cfe6a | 529 | } |
072b91f9 BK |
530 | } |
531 | ||
532 | /** | |
533 | * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) | |
534 | * @vhost: ibmvfc host struct | |
535 | * | |
536 | * Return value: | |
537 | * nothing | |
538 | **/ | |
539 | static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) | |
540 | { | |
541 | if (vhost->action == IBMVFC_HOST_ACTION_NONE) { | |
2d0da2a4 BK |
542 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
543 | scsi_block_requests(vhost->host); | |
544 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); | |
545 | } | |
072b91f9 BK |
546 | } else |
547 | vhost->reinit = 1; | |
548 | ||
549 | wake_up(&vhost->work_wait_q); | |
550 | } | |
551 | ||
552 | /** | |
553 | * ibmvfc_link_down - Handle a link down event from the adapter | |
554 | * @vhost: ibmvfc host struct | |
555 | * @state: ibmvfc host state to enter | |
556 | * | |
557 | **/ | |
558 | static void ibmvfc_link_down(struct ibmvfc_host *vhost, | |
559 | enum ibmvfc_host_state state) | |
560 | { | |
561 | struct ibmvfc_target *tgt; | |
562 | ||
563 | ENTER; | |
564 | scsi_block_requests(vhost->host); | |
565 | list_for_each_entry(tgt, &vhost->targets, queue) | |
566 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
567 | ibmvfc_set_host_state(vhost, state); | |
568 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); | |
569 | vhost->events_to_log |= IBMVFC_AE_LINKDOWN; | |
570 | wake_up(&vhost->work_wait_q); | |
571 | LEAVE; | |
572 | } | |
573 | ||
574 | /** | |
575 | * ibmvfc_init_host - Start host initialization | |
576 | * @vhost: ibmvfc host struct | |
577 | * | |
578 | * Return value: | |
579 | * nothing | |
580 | **/ | |
861890c6 | 581 | static void ibmvfc_init_host(struct ibmvfc_host *vhost) |
072b91f9 BK |
582 | { |
583 | struct ibmvfc_target *tgt; | |
584 | ||
585 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { | |
1c41fa82 | 586 | if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { |
072b91f9 BK |
587 | dev_err(vhost->dev, |
588 | "Host initialization retries exceeded. Taking adapter offline\n"); | |
589 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); | |
590 | return; | |
591 | } | |
592 | } | |
593 | ||
594 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { | |
861890c6 BK |
595 | memset(vhost->async_crq.msgs, 0, PAGE_SIZE); |
596 | vhost->async_crq.cur = 0; | |
cf6f10d7 | 597 | |
072b91f9 | 598 | list_for_each_entry(tgt, &vhost->targets, queue) |
5e47167b | 599 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
072b91f9 BK |
600 | scsi_block_requests(vhost->host); |
601 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); | |
602 | vhost->job_step = ibmvfc_npiv_login; | |
603 | wake_up(&vhost->work_wait_q); | |
604 | } | |
605 | } | |
606 | ||
607 | /** | |
608 | * ibmvfc_send_crq - Send a CRQ | |
609 | * @vhost: ibmvfc host struct | |
610 | * @word1: the first 64 bits of the data | |
611 | * @word2: the second 64 bits of the data | |
612 | * | |
613 | * Return value: | |
614 | * 0 on success / other on failure | |
615 | **/ | |
616 | static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) | |
617 | { | |
618 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
619 | return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); | |
620 | } | |
621 | ||
622 | /** | |
623 | * ibmvfc_send_crq_init - Send a CRQ init message | |
624 | * @vhost: ibmvfc host struct | |
625 | * | |
626 | * Return value: | |
627 | * 0 on success / other on failure | |
628 | **/ | |
629 | static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) | |
630 | { | |
631 | ibmvfc_dbg(vhost, "Sending CRQ init\n"); | |
632 | return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); | |
633 | } | |
634 | ||
635 | /** | |
636 | * ibmvfc_send_crq_init_complete - Send a CRQ init complete message | |
637 | * @vhost: ibmvfc host struct | |
638 | * | |
639 | * Return value: | |
640 | * 0 on success / other on failure | |
641 | **/ | |
642 | static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) | |
643 | { | |
644 | ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); | |
645 | return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); | |
646 | } | |
647 | ||
648 | /** | |
649 | * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ | |
650 | * @vhost: ibmvfc host struct | |
651 | * | |
652 | * Frees irq, deallocates a page for messages, unmaps dma, and unregisters | |
653 | * the crq with the hypervisor. | |
654 | **/ | |
655 | static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) | |
656 | { | |
73ee5d86 | 657 | long rc = 0; |
072b91f9 BK |
658 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
659 | struct ibmvfc_crq_queue *crq = &vhost->crq; | |
660 | ||
661 | ibmvfc_dbg(vhost, "Releasing CRQ\n"); | |
662 | free_irq(vdev->irq, vhost); | |
039a0898 | 663 | tasklet_kill(&vhost->tasklet); |
072b91f9 | 664 | do { |
73ee5d86 BK |
665 | if (rc) |
666 | msleep(100); | |
072b91f9 BK |
667 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
668 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
669 | ||
670 | vhost->state = IBMVFC_NO_CRQ; | |
79111d08 | 671 | vhost->logged_in = 0; |
072b91f9 BK |
672 | dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); |
673 | free_page((unsigned long)crq->msgs); | |
674 | } | |
675 | ||
676 | /** | |
677 | * ibmvfc_reenable_crq_queue - reenables the CRQ | |
678 | * @vhost: ibmvfc host struct | |
679 | * | |
680 | * Return value: | |
681 | * 0 on success / other on failure | |
682 | **/ | |
683 | static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) | |
684 | { | |
73ee5d86 | 685 | int rc = 0; |
072b91f9 BK |
686 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
687 | ||
688 | /* Re-enable the CRQ */ | |
689 | do { | |
73ee5d86 BK |
690 | if (rc) |
691 | msleep(100); | |
072b91f9 BK |
692 | rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); |
693 | } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
694 | ||
695 | if (rc) | |
696 | dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); | |
697 | ||
698 | return rc; | |
699 | } | |
700 | ||
701 | /** | |
702 | * ibmvfc_reset_crq - resets a crq after a failure | |
703 | * @vhost: ibmvfc host struct | |
704 | * | |
705 | * Return value: | |
706 | * 0 on success / other on failure | |
707 | **/ | |
708 | static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) | |
709 | { | |
73ee5d86 BK |
710 | int rc = 0; |
711 | unsigned long flags; | |
072b91f9 BK |
712 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
713 | struct ibmvfc_crq_queue *crq = &vhost->crq; | |
714 | ||
715 | /* Close the CRQ */ | |
716 | do { | |
73ee5d86 BK |
717 | if (rc) |
718 | msleep(100); | |
072b91f9 BK |
719 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
720 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
721 | ||
73ee5d86 | 722 | spin_lock_irqsave(vhost->host->host_lock, flags); |
072b91f9 | 723 | vhost->state = IBMVFC_NO_CRQ; |
79111d08 | 724 | vhost->logged_in = 0; |
072b91f9 BK |
725 | |
726 | /* Clean out the queue */ | |
727 | memset(crq->msgs, 0, PAGE_SIZE); | |
728 | crq->cur = 0; | |
729 | ||
730 | /* And re-open it again */ | |
731 | rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, | |
732 | crq->msg_token, PAGE_SIZE); | |
733 | ||
734 | if (rc == H_CLOSED) | |
735 | /* Adapter is good, but other end is not ready */ | |
736 | dev_warn(vhost->dev, "Partner adapter not ready\n"); | |
737 | else if (rc != 0) | |
738 | dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); | |
73ee5d86 | 739 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
072b91f9 BK |
740 | |
741 | return rc; | |
742 | } | |
743 | ||
744 | /** | |
745 | * ibmvfc_valid_event - Determines if event is valid. | |
746 | * @pool: event_pool that contains the event | |
747 | * @evt: ibmvfc event to be checked for validity | |
748 | * | |
749 | * Return value: | |
750 | * 1 if event is valid / 0 if event is not valid | |
751 | **/ | |
752 | static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, | |
753 | struct ibmvfc_event *evt) | |
754 | { | |
755 | int index = evt - pool->events; | |
756 | if (index < 0 || index >= pool->size) /* outside of bounds */ | |
757 | return 0; | |
758 | if (evt != pool->events + index) /* unaligned */ | |
759 | return 0; | |
760 | return 1; | |
761 | } | |
762 | ||
763 | /** | |
764 | * ibmvfc_free_event - Free the specified event | |
765 | * @evt: ibmvfc_event to be freed | |
766 | * | |
767 | **/ | |
768 | static void ibmvfc_free_event(struct ibmvfc_event *evt) | |
769 | { | |
770 | struct ibmvfc_host *vhost = evt->vhost; | |
771 | struct ibmvfc_event_pool *pool = &vhost->pool; | |
772 | ||
773 | BUG_ON(!ibmvfc_valid_event(pool, evt)); | |
774 | BUG_ON(atomic_inc_return(&evt->free) != 1); | |
775 | list_add_tail(&evt->queue, &vhost->free); | |
776 | } | |
777 | ||
778 | /** | |
779 | * ibmvfc_scsi_eh_done - EH done function for queuecommand commands | |
780 | * @evt: ibmvfc event struct | |
781 | * | |
782 | * This function does not setup any error status, that must be done | |
783 | * before this function gets called. | |
784 | **/ | |
785 | static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) | |
786 | { | |
787 | struct scsi_cmnd *cmnd = evt->cmnd; | |
788 | ||
789 | if (cmnd) { | |
790 | scsi_dma_unmap(cmnd); | |
791 | cmnd->scsi_done(cmnd); | |
792 | } | |
793 | ||
ad8dcffa BK |
794 | if (evt->eh_comp) |
795 | complete(evt->eh_comp); | |
796 | ||
072b91f9 BK |
797 | ibmvfc_free_event(evt); |
798 | } | |
799 | ||
800 | /** | |
801 | * ibmvfc_fail_request - Fail request with specified error code | |
802 | * @evt: ibmvfc event struct | |
803 | * @error_code: error code to fail request with | |
804 | * | |
805 | * Return value: | |
806 | * none | |
807 | **/ | |
808 | static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) | |
809 | { | |
810 | if (evt->cmnd) { | |
811 | evt->cmnd->result = (error_code << 16); | |
812 | evt->done = ibmvfc_scsi_eh_done; | |
813 | } else | |
0aab6c3f | 814 | evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED); |
072b91f9 BK |
815 | |
816 | list_del(&evt->queue); | |
817 | del_timer(&evt->timer); | |
818 | ibmvfc_trc_end(evt); | |
819 | evt->done(evt); | |
820 | } | |
821 | ||
822 | /** | |
823 | * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests | |
824 | * @vhost: ibmvfc host struct | |
825 | * @error_code: error code to fail requests with | |
826 | * | |
827 | * Return value: | |
828 | * none | |
829 | **/ | |
830 | static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) | |
831 | { | |
832 | struct ibmvfc_event *evt, *pos; | |
833 | ||
834 | ibmvfc_dbg(vhost, "Purging all requests\n"); | |
835 | list_for_each_entry_safe(evt, pos, &vhost->sent, queue) | |
836 | ibmvfc_fail_request(evt, error_code); | |
837 | } | |
838 | ||
839 | /** | |
79111d08 | 840 | * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ |
072b91f9 BK |
841 | * @vhost: struct ibmvfc host to reset |
842 | **/ | |
79111d08 | 843 | static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) |
072b91f9 | 844 | { |
072b91f9 | 845 | ibmvfc_purge_requests(vhost, DID_ERROR); |
73ee5d86 BK |
846 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
847 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); | |
072b91f9 BK |
848 | } |
849 | ||
850 | /** | |
79111d08 | 851 | * __ibmvfc_reset_host - Reset the connection to the server (no locking) |
072b91f9 BK |
852 | * @vhost: struct ibmvfc host to reset |
853 | **/ | |
79111d08 BK |
854 | static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) |
855 | { | |
856 | if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && | |
857 | !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { | |
858 | scsi_block_requests(vhost->host); | |
859 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); | |
860 | vhost->job_step = ibmvfc_npiv_logout; | |
861 | wake_up(&vhost->work_wait_q); | |
862 | } else | |
863 | ibmvfc_hard_reset_host(vhost); | |
864 | } | |
865 | ||
866 | /** | |
867 | * ibmvfc_reset_host - Reset the connection to the server | |
868 | * @vhost: ibmvfc host struct | |
869 | **/ | |
072b91f9 BK |
870 | static void ibmvfc_reset_host(struct ibmvfc_host *vhost) |
871 | { | |
872 | unsigned long flags; | |
873 | ||
874 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
875 | __ibmvfc_reset_host(vhost); | |
876 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
877 | } | |
878 | ||
879 | /** | |
880 | * ibmvfc_retry_host_init - Retry host initialization if allowed | |
881 | * @vhost: ibmvfc host struct | |
882 | * | |
7d0e4622 BK |
883 | * Returns: 1 if init will be retried / 0 if not |
884 | * | |
072b91f9 | 885 | **/ |
7d0e4622 | 886 | static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) |
072b91f9 | 887 | { |
7d0e4622 BK |
888 | int retry = 0; |
889 | ||
072b91f9 | 890 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { |
1c41fa82 BK |
891 | vhost->delay_init = 1; |
892 | if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { | |
072b91f9 BK |
893 | dev_err(vhost->dev, |
894 | "Host initialization retries exceeded. Taking adapter offline\n"); | |
895 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); | |
1c41fa82 | 896 | } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) |
072b91f9 | 897 | __ibmvfc_reset_host(vhost); |
7d0e4622 | 898 | else { |
072b91f9 | 899 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
7d0e4622 BK |
900 | retry = 1; |
901 | } | |
072b91f9 BK |
902 | } |
903 | ||
904 | wake_up(&vhost->work_wait_q); | |
7d0e4622 | 905 | return retry; |
072b91f9 BK |
906 | } |
907 | ||
908 | /** | |
b3c10489 | 909 | * __ibmvfc_get_target - Find the specified scsi_target (no locking) |
072b91f9 BK |
910 | * @starget: scsi target struct |
911 | * | |
912 | * Return value: | |
913 | * ibmvfc_target struct / NULL if not found | |
914 | **/ | |
b3c10489 | 915 | static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) |
072b91f9 BK |
916 | { |
917 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
918 | struct ibmvfc_host *vhost = shost_priv(shost); | |
919 | struct ibmvfc_target *tgt; | |
920 | ||
921 | list_for_each_entry(tgt, &vhost->targets, queue) | |
b3c10489 BK |
922 | if (tgt->target_id == starget->id) { |
923 | kref_get(&tgt->kref); | |
072b91f9 | 924 | return tgt; |
b3c10489 | 925 | } |
072b91f9 BK |
926 | return NULL; |
927 | } | |
928 | ||
929 | /** | |
b3c10489 | 930 | * ibmvfc_get_target - Find the specified scsi_target |
072b91f9 BK |
931 | * @starget: scsi target struct |
932 | * | |
933 | * Return value: | |
934 | * ibmvfc_target struct / NULL if not found | |
935 | **/ | |
b3c10489 | 936 | static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) |
072b91f9 BK |
937 | { |
938 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
939 | struct ibmvfc_target *tgt; | |
940 | unsigned long flags; | |
941 | ||
942 | spin_lock_irqsave(shost->host_lock, flags); | |
b3c10489 | 943 | tgt = __ibmvfc_get_target(starget); |
072b91f9 BK |
944 | spin_unlock_irqrestore(shost->host_lock, flags); |
945 | return tgt; | |
946 | } | |
947 | ||
948 | /** | |
949 | * ibmvfc_get_host_speed - Get host port speed | |
950 | * @shost: scsi host struct | |
951 | * | |
952 | * Return value: | |
953 | * none | |
954 | **/ | |
955 | static void ibmvfc_get_host_speed(struct Scsi_Host *shost) | |
956 | { | |
957 | struct ibmvfc_host *vhost = shost_priv(shost); | |
958 | unsigned long flags; | |
959 | ||
960 | spin_lock_irqsave(shost->host_lock, flags); | |
961 | if (vhost->state == IBMVFC_ACTIVE) { | |
0aab6c3f | 962 | switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) { |
072b91f9 BK |
963 | case 1: |
964 | fc_host_speed(shost) = FC_PORTSPEED_1GBIT; | |
965 | break; | |
966 | case 2: | |
967 | fc_host_speed(shost) = FC_PORTSPEED_2GBIT; | |
968 | break; | |
969 | case 4: | |
970 | fc_host_speed(shost) = FC_PORTSPEED_4GBIT; | |
971 | break; | |
972 | case 8: | |
973 | fc_host_speed(shost) = FC_PORTSPEED_8GBIT; | |
974 | break; | |
975 | case 10: | |
976 | fc_host_speed(shost) = FC_PORTSPEED_10GBIT; | |
977 | break; | |
978 | case 16: | |
979 | fc_host_speed(shost) = FC_PORTSPEED_16GBIT; | |
980 | break; | |
981 | default: | |
775a42ec | 982 | ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", |
0aab6c3f | 983 | be64_to_cpu(vhost->login_buf->resp.link_speed) / 100); |
072b91f9 BK |
984 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; |
985 | break; | |
986 | } | |
987 | } else | |
988 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; | |
989 | spin_unlock_irqrestore(shost->host_lock, flags); | |
990 | } | |
991 | ||
992 | /** | |
993 | * ibmvfc_get_host_port_state - Get host port state | |
994 | * @shost: scsi host struct | |
995 | * | |
996 | * Return value: | |
997 | * none | |
998 | **/ | |
999 | static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) | |
1000 | { | |
1001 | struct ibmvfc_host *vhost = shost_priv(shost); | |
1002 | unsigned long flags; | |
1003 | ||
1004 | spin_lock_irqsave(shost->host_lock, flags); | |
1005 | switch (vhost->state) { | |
1006 | case IBMVFC_INITIALIZING: | |
1007 | case IBMVFC_ACTIVE: | |
1008 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
1009 | break; | |
1010 | case IBMVFC_LINK_DOWN: | |
1011 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
1012 | break; | |
1013 | case IBMVFC_LINK_DEAD: | |
1014 | case IBMVFC_HOST_OFFLINE: | |
1015 | fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; | |
1016 | break; | |
1017 | case IBMVFC_HALTED: | |
1018 | fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; | |
1019 | break; | |
0ae808e0 BK |
1020 | case IBMVFC_NO_CRQ: |
1021 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
1022 | break; | |
072b91f9 BK |
1023 | default: |
1024 | ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); | |
1025 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
1026 | break; | |
1027 | } | |
1028 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1029 | } | |
1030 | ||
1031 | /** | |
1032 | * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout | |
1033 | * @rport: rport struct | |
1034 | * @timeout: timeout value | |
1035 | * | |
1036 | * Return value: | |
1037 | * none | |
1038 | **/ | |
1039 | static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) | |
1040 | { | |
1041 | if (timeout) | |
1042 | rport->dev_loss_tmo = timeout; | |
1043 | else | |
1044 | rport->dev_loss_tmo = 1; | |
1045 | } | |
1046 | ||
b3c10489 BK |
1047 | /** |
1048 | * ibmvfc_release_tgt - Free memory allocated for a target | |
1049 | * @kref: kref struct | |
1050 | * | |
1051 | **/ | |
1052 | static void ibmvfc_release_tgt(struct kref *kref) | |
1053 | { | |
1054 | struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); | |
1055 | kfree(tgt); | |
1056 | } | |
1057 | ||
072b91f9 BK |
1058 | /** |
1059 | * ibmvfc_get_starget_node_name - Get SCSI target's node name | |
1060 | * @starget: scsi target struct | |
1061 | * | |
1062 | * Return value: | |
1063 | * none | |
1064 | **/ | |
1065 | static void ibmvfc_get_starget_node_name(struct scsi_target *starget) | |
1066 | { | |
b3c10489 | 1067 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1068 | fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; |
b3c10489 BK |
1069 | if (tgt) |
1070 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1071 | } |
1072 | ||
1073 | /** | |
1074 | * ibmvfc_get_starget_port_name - Get SCSI target's port name | |
1075 | * @starget: scsi target struct | |
1076 | * | |
1077 | * Return value: | |
1078 | * none | |
1079 | **/ | |
1080 | static void ibmvfc_get_starget_port_name(struct scsi_target *starget) | |
1081 | { | |
b3c10489 | 1082 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1083 | fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; |
b3c10489 BK |
1084 | if (tgt) |
1085 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1086 | } |
1087 | ||
1088 | /** | |
1089 | * ibmvfc_get_starget_port_id - Get SCSI target's port ID | |
1090 | * @starget: scsi target struct | |
1091 | * | |
1092 | * Return value: | |
1093 | * none | |
1094 | **/ | |
1095 | static void ibmvfc_get_starget_port_id(struct scsi_target *starget) | |
1096 | { | |
b3c10489 | 1097 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1098 | fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; |
b3c10489 BK |
1099 | if (tgt) |
1100 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1101 | } |
1102 | ||
1103 | /** | |
1104 | * ibmvfc_wait_while_resetting - Wait while the host resets | |
1105 | * @vhost: ibmvfc host struct | |
1106 | * | |
1107 | * Return value: | |
1108 | * 0 on success / other on failure | |
1109 | **/ | |
1110 | static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) | |
1111 | { | |
1112 | long timeout = wait_event_timeout(vhost->init_wait_q, | |
3eddc569 BK |
1113 | ((vhost->state == IBMVFC_ACTIVE || |
1114 | vhost->state == IBMVFC_HOST_OFFLINE || | |
1115 | vhost->state == IBMVFC_LINK_DEAD) && | |
1116 | vhost->action == IBMVFC_HOST_ACTION_NONE), | |
072b91f9 BK |
1117 | (init_timeout * HZ)); |
1118 | ||
1119 | return timeout ? 0 : -EIO; | |
1120 | } | |
1121 | ||
1122 | /** | |
1123 | * ibmvfc_issue_fc_host_lip - Re-initiate link initialization | |
1124 | * @shost: scsi host struct | |
1125 | * | |
1126 | * Return value: | |
1127 | * 0 on success / other on failure | |
1128 | **/ | |
1129 | static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) | |
1130 | { | |
1131 | struct ibmvfc_host *vhost = shost_priv(shost); | |
1132 | ||
1133 | dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); | |
1134 | ibmvfc_reset_host(vhost); | |
1135 | return ibmvfc_wait_while_resetting(vhost); | |
1136 | } | |
1137 | ||
1138 | /** | |
1139 | * ibmvfc_gather_partition_info - Gather info about the LPAR | |
1140 | * | |
1141 | * Return value: | |
1142 | * none | |
1143 | **/ | |
1144 | static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) | |
1145 | { | |
1146 | struct device_node *rootdn; | |
1147 | const char *name; | |
1148 | const unsigned int *num; | |
1149 | ||
1150 | rootdn = of_find_node_by_path("/"); | |
1151 | if (!rootdn) | |
1152 | return; | |
1153 | ||
1154 | name = of_get_property(rootdn, "ibm,partition-name", NULL); | |
1155 | if (name) | |
1156 | strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); | |
1157 | num = of_get_property(rootdn, "ibm,partition-no", NULL); | |
1158 | if (num) | |
1159 | vhost->partition_number = *num; | |
1160 | of_node_put(rootdn); | |
1161 | } | |
1162 | ||
1163 | /** | |
1164 | * ibmvfc_set_login_info - Setup info for NPIV login | |
1165 | * @vhost: ibmvfc host struct | |
1166 | * | |
1167 | * Return value: | |
1168 | * none | |
1169 | **/ | |
1170 | static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) | |
1171 | { | |
1172 | struct ibmvfc_npiv_login *login_info = &vhost->login_info; | |
61c7a080 | 1173 | struct device_node *of_node = vhost->dev->of_node; |
072b91f9 BK |
1174 | const char *location; |
1175 | ||
1176 | memset(login_info, 0, sizeof(*login_info)); | |
1177 | ||
0aab6c3f TD |
1178 | login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX); |
1179 | login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); | |
1180 | login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); | |
1181 | login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); | |
1182 | login_info->partition_num = cpu_to_be32(vhost->partition_number); | |
1183 | login_info->vfc_frame_version = cpu_to_be32(1); | |
1184 | login_info->fcp_version = cpu_to_be16(3); | |
1185 | login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); | |
072b91f9 | 1186 | if (vhost->client_migrated) |
0aab6c3f | 1187 | login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); |
072b91f9 | 1188 | |
0aab6c3f TD |
1189 | login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ); |
1190 | login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE); | |
1191 | login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); | |
1192 | login_info->async.len = cpu_to_be32(vhost->async_crq.size * sizeof(*vhost->async_crq.msgs)); | |
072b91f9 BK |
1193 | strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); |
1194 | strncpy(login_info->device_name, | |
71610f55 | 1195 | dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); |
072b91f9 BK |
1196 | |
1197 | location = of_get_property(of_node, "ibm,loc-code", NULL); | |
71610f55 | 1198 | location = location ? location : dev_name(vhost->dev); |
072b91f9 BK |
1199 | strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); |
1200 | } | |
1201 | ||
1202 | /** | |
1203 | * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host | |
1204 | * @vhost: ibmvfc host who owns the event pool | |
1205 | * | |
1206 | * Returns zero on success. | |
1207 | **/ | |
1208 | static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) | |
1209 | { | |
1210 | int i; | |
1211 | struct ibmvfc_event_pool *pool = &vhost->pool; | |
1212 | ||
1213 | ENTER; | |
1214 | pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; | |
1215 | pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); | |
1216 | if (!pool->events) | |
1217 | return -ENOMEM; | |
1218 | ||
1219 | pool->iu_storage = dma_alloc_coherent(vhost->dev, | |
1220 | pool->size * sizeof(*pool->iu_storage), | |
1221 | &pool->iu_token, 0); | |
1222 | ||
1223 | if (!pool->iu_storage) { | |
1224 | kfree(pool->events); | |
1225 | return -ENOMEM; | |
1226 | } | |
1227 | ||
1228 | for (i = 0; i < pool->size; ++i) { | |
1229 | struct ibmvfc_event *evt = &pool->events[i]; | |
1230 | atomic_set(&evt->free, 1); | |
1231 | evt->crq.valid = 0x80; | |
0aab6c3f | 1232 | evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i)); |
072b91f9 BK |
1233 | evt->xfer_iu = pool->iu_storage + i; |
1234 | evt->vhost = vhost; | |
1235 | evt->ext_list = NULL; | |
1236 | list_add_tail(&evt->queue, &vhost->free); | |
1237 | } | |
1238 | ||
1239 | LEAVE; | |
1240 | return 0; | |
1241 | } | |
1242 | ||
1243 | /** | |
1244 | * ibmvfc_free_event_pool - Frees memory of the event pool of a host | |
1245 | * @vhost: ibmvfc host who owns the event pool | |
1246 | * | |
1247 | **/ | |
1248 | static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) | |
1249 | { | |
1250 | int i; | |
1251 | struct ibmvfc_event_pool *pool = &vhost->pool; | |
1252 | ||
1253 | ENTER; | |
1254 | for (i = 0; i < pool->size; ++i) { | |
1255 | list_del(&pool->events[i].queue); | |
1256 | BUG_ON(atomic_read(&pool->events[i].free) != 1); | |
1257 | if (pool->events[i].ext_list) | |
1258 | dma_pool_free(vhost->sg_pool, | |
1259 | pool->events[i].ext_list, | |
1260 | pool->events[i].ext_list_token); | |
1261 | } | |
1262 | ||
1263 | kfree(pool->events); | |
1264 | dma_free_coherent(vhost->dev, | |
1265 | pool->size * sizeof(*pool->iu_storage), | |
1266 | pool->iu_storage, pool->iu_token); | |
1267 | LEAVE; | |
1268 | } | |
1269 | ||
1270 | /** | |
1271 | * ibmvfc_get_event - Gets the next free event in pool | |
1272 | * @vhost: ibmvfc host struct | |
1273 | * | |
1274 | * Returns a free event from the pool. | |
1275 | **/ | |
1276 | static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) | |
1277 | { | |
1278 | struct ibmvfc_event *evt; | |
1279 | ||
1280 | BUG_ON(list_empty(&vhost->free)); | |
1281 | evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); | |
1282 | atomic_set(&evt->free, 0); | |
1283 | list_del(&evt->queue); | |
1284 | return evt; | |
1285 | } | |
1286 | ||
1287 | /** | |
1288 | * ibmvfc_init_event - Initialize fields in an event struct that are always | |
1289 | * required. | |
1290 | * @evt: The event | |
1291 | * @done: Routine to call when the event is responded to | |
1292 | * @format: SRP or MAD format | |
1293 | **/ | |
1294 | static void ibmvfc_init_event(struct ibmvfc_event *evt, | |
1295 | void (*done) (struct ibmvfc_event *), u8 format) | |
1296 | { | |
1297 | evt->cmnd = NULL; | |
1298 | evt->sync_iu = NULL; | |
1299 | evt->crq.format = format; | |
1300 | evt->done = done; | |
ad8dcffa | 1301 | evt->eh_comp = NULL; |
072b91f9 BK |
1302 | } |
1303 | ||
1304 | /** | |
1305 | * ibmvfc_map_sg_list - Initialize scatterlist | |
1306 | * @scmd: scsi command struct | |
1307 | * @nseg: number of scatterlist segments | |
1308 | * @md: memory descriptor list to initialize | |
1309 | **/ | |
1310 | static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, | |
1311 | struct srp_direct_buf *md) | |
1312 | { | |
1313 | int i; | |
1314 | struct scatterlist *sg; | |
1315 | ||
1316 | scsi_for_each_sg(scmd, sg, nseg, i) { | |
0aab6c3f TD |
1317 | md[i].va = cpu_to_be64(sg_dma_address(sg)); |
1318 | md[i].len = cpu_to_be32(sg_dma_len(sg)); | |
072b91f9 BK |
1319 | md[i].key = 0; |
1320 | } | |
1321 | } | |
1322 | ||
1323 | /** | |
1324 | * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields | |
91ebc1fa | 1325 | * @scmd: struct scsi_cmnd with the scatterlist |
072b91f9 BK |
1326 | * @evt: ibmvfc event struct |
1327 | * @vfc_cmd: vfc_cmd that contains the memory descriptor | |
1328 | * @dev: device for which to map dma memory | |
1329 | * | |
1330 | * Returns: | |
1331 | * 0 on success / non-zero on failure | |
1332 | **/ | |
1333 | static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, | |
1334 | struct ibmvfc_event *evt, | |
1335 | struct ibmvfc_cmd *vfc_cmd, struct device *dev) | |
1336 | { | |
1337 | ||
1338 | int sg_mapped; | |
1339 | struct srp_direct_buf *data = &vfc_cmd->ioba; | |
1340 | struct ibmvfc_host *vhost = dev_get_drvdata(dev); | |
1341 | ||
a6104b1e TD |
1342 | if (cls3_error) |
1343 | vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR); | |
1344 | ||
072b91f9 BK |
1345 | sg_mapped = scsi_dma_map(scmd); |
1346 | if (!sg_mapped) { | |
0aab6c3f | 1347 | vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC); |
072b91f9 BK |
1348 | return 0; |
1349 | } else if (unlikely(sg_mapped < 0)) { | |
1350 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1351 | scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); | |
1352 | return sg_mapped; | |
1353 | } | |
1354 | ||
1355 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { | |
0aab6c3f | 1356 | vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE); |
072b91f9 BK |
1357 | vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; |
1358 | } else { | |
0aab6c3f | 1359 | vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ); |
072b91f9 BK |
1360 | vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; |
1361 | } | |
1362 | ||
1363 | if (sg_mapped == 1) { | |
1364 | ibmvfc_map_sg_list(scmd, sg_mapped, data); | |
1365 | return 0; | |
1366 | } | |
1367 | ||
0aab6c3f | 1368 | vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST); |
072b91f9 BK |
1369 | |
1370 | if (!evt->ext_list) { | |
1371 | evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, | |
1372 | &evt->ext_list_token); | |
1373 | ||
1374 | if (!evt->ext_list) { | |
64b840dd BK |
1375 | scsi_dma_unmap(scmd); |
1376 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1377 | scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); | |
072b91f9 BK |
1378 | return -ENOMEM; |
1379 | } | |
1380 | } | |
1381 | ||
1382 | ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); | |
1383 | ||
0aab6c3f TD |
1384 | data->va = cpu_to_be64(evt->ext_list_token); |
1385 | data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf)); | |
072b91f9 BK |
1386 | data->key = 0; |
1387 | return 0; | |
1388 | } | |
1389 | ||
1390 | /** | |
1391 | * ibmvfc_timeout - Internal command timeout handler | |
1392 | * @evt: struct ibmvfc_event that timed out | |
1393 | * | |
1394 | * Called when an internally generated command times out | |
1395 | **/ | |
9a5d04fc | 1396 | static void ibmvfc_timeout(struct timer_list *t) |
072b91f9 | 1397 | { |
9a5d04fc | 1398 | struct ibmvfc_event *evt = from_timer(evt, t, timer); |
072b91f9 BK |
1399 | struct ibmvfc_host *vhost = evt->vhost; |
1400 | dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); | |
1401 | ibmvfc_reset_host(vhost); | |
1402 | } | |
1403 | ||
1404 | /** | |
1405 | * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() | |
1406 | * @evt: event to be sent | |
1407 | * @vhost: ibmvfc host struct | |
1408 | * @timeout: timeout in seconds - 0 means do not time command | |
1409 | * | |
1410 | * Returns the value returned from ibmvfc_send_crq(). (Zero for success) | |
1411 | **/ | |
1412 | static int ibmvfc_send_event(struct ibmvfc_event *evt, | |
1413 | struct ibmvfc_host *vhost, unsigned long timeout) | |
1414 | { | |
0aab6c3f | 1415 | __be64 *crq_as_u64 = (__be64 *) &evt->crq; |
072b91f9 BK |
1416 | int rc; |
1417 | ||
1418 | /* Copy the IU into the transfer area */ | |
1419 | *evt->xfer_iu = evt->iu; | |
1420 | if (evt->crq.format == IBMVFC_CMD_FORMAT) | |
0aab6c3f | 1421 | evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); |
072b91f9 | 1422 | else if (evt->crq.format == IBMVFC_MAD_FORMAT) |
0aab6c3f | 1423 | evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); |
072b91f9 BK |
1424 | else |
1425 | BUG(); | |
1426 | ||
1427 | list_add_tail(&evt->queue, &vhost->sent); | |
9a5d04fc | 1428 | timer_setup(&evt->timer, ibmvfc_timeout, 0); |
072b91f9 BK |
1429 | |
1430 | if (timeout) { | |
072b91f9 | 1431 | evt->timer.expires = jiffies + (timeout * HZ); |
072b91f9 BK |
1432 | add_timer(&evt->timer); |
1433 | } | |
1434 | ||
a528ab7a BK |
1435 | mb(); |
1436 | ||
0aab6c3f TD |
1437 | if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), |
1438 | be64_to_cpu(crq_as_u64[1])))) { | |
072b91f9 BK |
1439 | list_del(&evt->queue); |
1440 | del_timer(&evt->timer); | |
1441 | ||
1442 | /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. | |
1443 | * Firmware will send a CRQ with a transport event (0xFF) to | |
1444 | * tell this client what has happened to the transport. This | |
1445 | * will be handled in ibmvfc_handle_crq() | |
1446 | */ | |
1447 | if (rc == H_CLOSED) { | |
1448 | if (printk_ratelimit()) | |
1449 | dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); | |
1450 | if (evt->cmnd) | |
1451 | scsi_dma_unmap(evt->cmnd); | |
1452 | ibmvfc_free_event(evt); | |
1453 | return SCSI_MLQUEUE_HOST_BUSY; | |
1454 | } | |
1455 | ||
1456 | dev_err(vhost->dev, "Send error (rc=%d)\n", rc); | |
1457 | if (evt->cmnd) { | |
1458 | evt->cmnd->result = DID_ERROR << 16; | |
1459 | evt->done = ibmvfc_scsi_eh_done; | |
1460 | } else | |
0aab6c3f | 1461 | evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); |
072b91f9 BK |
1462 | |
1463 | evt->done(evt); | |
1464 | } else | |
1465 | ibmvfc_trc_start(evt); | |
1466 | ||
1467 | return 0; | |
1468 | } | |
1469 | ||
1470 | /** | |
1471 | * ibmvfc_log_error - Log an error for the failed command if appropriate | |
1472 | * @evt: ibmvfc event to log | |
1473 | * | |
1474 | **/ | |
1475 | static void ibmvfc_log_error(struct ibmvfc_event *evt) | |
1476 | { | |
1477 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
1478 | struct ibmvfc_host *vhost = evt->vhost; | |
1479 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; | |
1480 | struct scsi_cmnd *cmnd = evt->cmnd; | |
1481 | const char *err = unknown_error; | |
0aab6c3f | 1482 | int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); |
072b91f9 BK |
1483 | int logerr = 0; |
1484 | int rsp_code = 0; | |
1485 | ||
1486 | if (index >= 0) { | |
1487 | logerr = cmd_status[index].log; | |
1488 | err = cmd_status[index].name; | |
1489 | } | |
1490 | ||
0ae808e0 | 1491 | if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) |
072b91f9 BK |
1492 | return; |
1493 | ||
1494 | if (rsp->flags & FCP_RSP_LEN_VALID) | |
1495 | rsp_code = rsp->data.info.rsp_code; | |
1496 | ||
1497 | scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " | |
1498 | "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", | |
1499 | cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, | |
1500 | rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); | |
1501 | } | |
1502 | ||
6d29cc56 BK |
1503 | /** |
1504 | * ibmvfc_relogin - Log back into the specified device | |
1505 | * @sdev: scsi device struct | |
1506 | * | |
1507 | **/ | |
1508 | static void ibmvfc_relogin(struct scsi_device *sdev) | |
1509 | { | |
1510 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
1511 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
1512 | struct ibmvfc_target *tgt; | |
1513 | ||
1514 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
1515 | if (rport == tgt->rport) { | |
1516 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
1517 | break; | |
1518 | } | |
1519 | } | |
1520 | ||
1521 | ibmvfc_reinit_host(vhost); | |
1522 | } | |
1523 | ||
072b91f9 BK |
1524 | /** |
1525 | * ibmvfc_scsi_done - Handle responses from commands | |
1526 | * @evt: ibmvfc event to be handled | |
1527 | * | |
1528 | * Used as a callback when sending scsi cmds. | |
1529 | **/ | |
1530 | static void ibmvfc_scsi_done(struct ibmvfc_event *evt) | |
1531 | { | |
1532 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
1533 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; | |
1534 | struct scsi_cmnd *cmnd = evt->cmnd; | |
2bac406d | 1535 | u32 rsp_len = 0; |
0aab6c3f | 1536 | u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); |
072b91f9 BK |
1537 | |
1538 | if (cmnd) { | |
0aab6c3f TD |
1539 | if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) |
1540 | scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); | |
072b91f9 | 1541 | else if (rsp->flags & FCP_RESID_UNDER) |
0aab6c3f | 1542 | scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); |
072b91f9 BK |
1543 | else |
1544 | scsi_set_resid(cmnd, 0); | |
1545 | ||
1546 | if (vfc_cmd->status) { | |
1547 | cmnd->result = ibmvfc_get_err_result(vfc_cmd); | |
1548 | ||
1549 | if (rsp->flags & FCP_RSP_LEN_VALID) | |
0aab6c3f | 1550 | rsp_len = be32_to_cpu(rsp->fcp_rsp_len); |
072b91f9 BK |
1551 | if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) |
1552 | sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; | |
2bac406d | 1553 | if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) |
072b91f9 | 1554 | memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); |
0aab6c3f TD |
1555 | if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && |
1556 | (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) | |
6d29cc56 | 1557 | ibmvfc_relogin(cmnd->device); |
072b91f9 | 1558 | |
50119dad BK |
1559 | if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) |
1560 | cmnd->result = (DID_ERROR << 16); | |
1561 | ||
072b91f9 BK |
1562 | ibmvfc_log_error(evt); |
1563 | } | |
1564 | ||
1565 | if (!cmnd->result && | |
1566 | (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) | |
1567 | cmnd->result = (DID_ERROR << 16); | |
1568 | ||
1569 | scsi_dma_unmap(cmnd); | |
1570 | cmnd->scsi_done(cmnd); | |
1571 | } | |
1572 | ||
ad8dcffa BK |
1573 | if (evt->eh_comp) |
1574 | complete(evt->eh_comp); | |
1575 | ||
072b91f9 BK |
1576 | ibmvfc_free_event(evt); |
1577 | } | |
1578 | ||
1579 | /** | |
1580 | * ibmvfc_host_chkready - Check if the host can accept commands | |
1581 | * @vhost: struct ibmvfc host | |
1582 | * | |
1583 | * Returns: | |
1584 | * 1 if host can accept command / 0 if not | |
1585 | **/ | |
1586 | static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) | |
1587 | { | |
1588 | int result = 0; | |
1589 | ||
1590 | switch (vhost->state) { | |
1591 | case IBMVFC_LINK_DEAD: | |
1592 | case IBMVFC_HOST_OFFLINE: | |
1593 | result = DID_NO_CONNECT << 16; | |
1594 | break; | |
1595 | case IBMVFC_NO_CRQ: | |
1596 | case IBMVFC_INITIALIZING: | |
1597 | case IBMVFC_HALTED: | |
1598 | case IBMVFC_LINK_DOWN: | |
1599 | result = DID_REQUEUE << 16; | |
1600 | break; | |
1601 | case IBMVFC_ACTIVE: | |
1602 | result = 0; | |
1603 | break; | |
f36cfe6a | 1604 | } |
072b91f9 BK |
1605 | |
1606 | return result; | |
1607 | } | |
1608 | ||
1609 | /** | |
1610 | * ibmvfc_queuecommand - The queuecommand function of the scsi template | |
1611 | * @cmnd: struct scsi_cmnd to be executed | |
1612 | * @done: Callback function to be called when cmnd is completed | |
1613 | * | |
1614 | * Returns: | |
1615 | * 0 on success / other on failure | |
1616 | **/ | |
f281233d | 1617 | static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd, |
072b91f9 BK |
1618 | void (*done) (struct scsi_cmnd *)) |
1619 | { | |
1620 | struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); | |
1621 | struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); | |
1622 | struct ibmvfc_cmd *vfc_cmd; | |
1623 | struct ibmvfc_event *evt; | |
072b91f9 BK |
1624 | int rc; |
1625 | ||
1626 | if (unlikely((rc = fc_remote_port_chkready(rport))) || | |
1627 | unlikely((rc = ibmvfc_host_chkready(vhost)))) { | |
1628 | cmnd->result = rc; | |
1629 | done(cmnd); | |
1630 | return 0; | |
1631 | } | |
1632 | ||
1633 | cmnd->result = (DID_OK << 16); | |
1634 | evt = ibmvfc_get_event(vhost); | |
1635 | ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); | |
1636 | evt->cmnd = cmnd; | |
1637 | cmnd->scsi_done = done; | |
1638 | vfc_cmd = &evt->iu.cmd; | |
1639 | memset(vfc_cmd, 0, sizeof(*vfc_cmd)); | |
0aab6c3f TD |
1640 | vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); |
1641 | vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp)); | |
1642 | vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); | |
1643 | vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu)); | |
1644 | vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp)); | |
1645 | vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata); | |
1646 | vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); | |
1647 | vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); | |
072b91f9 BK |
1648 | int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); |
1649 | memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); | |
1650 | ||
50668633 CH |
1651 | if (cmnd->flags & SCMD_TAGGED) { |
1652 | vfc_cmd->task_tag = cpu_to_be64(cmnd->tag); | |
1653 | vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; | |
072b91f9 BK |
1654 | } |
1655 | ||
1656 | if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) | |
1657 | return ibmvfc_send_event(evt, vhost, 0); | |
1658 | ||
1659 | ibmvfc_free_event(evt); | |
1660 | if (rc == -ENOMEM) | |
1661 | return SCSI_MLQUEUE_HOST_BUSY; | |
1662 | ||
1663 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1664 | scmd_printk(KERN_ERR, cmnd, | |
1665 | "Failed to map DMA buffer for command. rc=%d\n", rc); | |
1666 | ||
1667 | cmnd->result = DID_ERROR << 16; | |
1668 | done(cmnd); | |
1669 | return 0; | |
1670 | } | |
1671 | ||
f281233d JG |
1672 | static DEF_SCSI_QCMD(ibmvfc_queuecommand) |
1673 | ||
072b91f9 BK |
1674 | /** |
1675 | * ibmvfc_sync_completion - Signal that a synchronous command has completed | |
1676 | * @evt: ibmvfc event struct | |
1677 | * | |
1678 | **/ | |
1679 | static void ibmvfc_sync_completion(struct ibmvfc_event *evt) | |
1680 | { | |
1681 | /* copy the response back */ | |
1682 | if (evt->sync_iu) | |
1683 | *evt->sync_iu = *evt->xfer_iu; | |
1684 | ||
1685 | complete(&evt->comp); | |
1686 | } | |
1687 | ||
d31429e1 BK |
1688 | /** |
1689 | * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands | |
1690 | * @evt: struct ibmvfc_event | |
1691 | * | |
1692 | **/ | |
1693 | static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) | |
1694 | { | |
1695 | struct ibmvfc_host *vhost = evt->vhost; | |
1696 | ||
1697 | ibmvfc_free_event(evt); | |
1698 | vhost->aborting_passthru = 0; | |
1699 | dev_info(vhost->dev, "Passthru command cancelled\n"); | |
1700 | } | |
1701 | ||
1702 | /** | |
1703 | * ibmvfc_bsg_timeout - Handle a BSG timeout | |
75cc8cfc | 1704 | * @job: struct bsg_job that timed out |
d31429e1 BK |
1705 | * |
1706 | * Returns: | |
1707 | * 0 on success / other on failure | |
1708 | **/ | |
75cc8cfc | 1709 | static int ibmvfc_bsg_timeout(struct bsg_job *job) |
d31429e1 | 1710 | { |
cd21c605 | 1711 | struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); |
d31429e1 BK |
1712 | unsigned long port_id = (unsigned long)job->dd_data; |
1713 | struct ibmvfc_event *evt; | |
1714 | struct ibmvfc_tmf *tmf; | |
1715 | unsigned long flags; | |
1716 | int rc; | |
1717 | ||
1718 | ENTER; | |
1719 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1720 | if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { | |
1721 | __ibmvfc_reset_host(vhost); | |
1722 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1723 | return 0; | |
1724 | } | |
1725 | ||
1726 | vhost->aborting_passthru = 1; | |
1727 | evt = ibmvfc_get_event(vhost); | |
1728 | ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); | |
1729 | ||
1730 | tmf = &evt->iu.tmf; | |
1731 | memset(tmf, 0, sizeof(*tmf)); | |
0aab6c3f TD |
1732 | tmf->common.version = cpu_to_be32(1); |
1733 | tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); | |
1734 | tmf->common.length = cpu_to_be16(sizeof(*tmf)); | |
1735 | tmf->scsi_id = cpu_to_be64(port_id); | |
1736 | tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); | |
1737 | tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); | |
d31429e1 BK |
1738 | rc = ibmvfc_send_event(evt, vhost, default_timeout); |
1739 | ||
1740 | if (rc != 0) { | |
1741 | vhost->aborting_passthru = 0; | |
1742 | dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); | |
1743 | rc = -EIO; | |
1744 | } else | |
1745 | dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", | |
1746 | port_id); | |
1747 | ||
1748 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1749 | ||
1750 | LEAVE; | |
1751 | return rc; | |
1752 | } | |
1753 | ||
1754 | /** | |
1755 | * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command | |
1756 | * @vhost: struct ibmvfc_host to send command | |
1757 | * @port_id: port ID to send command | |
1758 | * | |
1759 | * Returns: | |
1760 | * 0 on success / other on failure | |
1761 | **/ | |
1762 | static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) | |
1763 | { | |
1764 | struct ibmvfc_port_login *plogi; | |
1765 | struct ibmvfc_target *tgt; | |
1766 | struct ibmvfc_event *evt; | |
1767 | union ibmvfc_iu rsp_iu; | |
1768 | unsigned long flags; | |
1769 | int rc = 0, issue_login = 1; | |
1770 | ||
1771 | ENTER; | |
1772 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1773 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
1774 | if (tgt->scsi_id == port_id) { | |
1775 | issue_login = 0; | |
1776 | break; | |
1777 | } | |
1778 | } | |
1779 | ||
1780 | if (!issue_login) | |
1781 | goto unlock_out; | |
1782 | if (unlikely((rc = ibmvfc_host_chkready(vhost)))) | |
1783 | goto unlock_out; | |
1784 | ||
1785 | evt = ibmvfc_get_event(vhost); | |
1786 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); | |
1787 | plogi = &evt->iu.plogi; | |
1788 | memset(plogi, 0, sizeof(*plogi)); | |
0aab6c3f TD |
1789 | plogi->common.version = cpu_to_be32(1); |
1790 | plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); | |
1791 | plogi->common.length = cpu_to_be16(sizeof(*plogi)); | |
1792 | plogi->scsi_id = cpu_to_be64(port_id); | |
d31429e1 BK |
1793 | evt->sync_iu = &rsp_iu; |
1794 | init_completion(&evt->comp); | |
1795 | ||
1796 | rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
1797 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1798 | ||
1799 | if (rc) | |
1800 | return -EIO; | |
1801 | ||
1802 | wait_for_completion(&evt->comp); | |
1803 | ||
1804 | if (rsp_iu.plogi.common.status) | |
1805 | rc = -EIO; | |
1806 | ||
1807 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1808 | ibmvfc_free_event(evt); | |
1809 | unlock_out: | |
1810 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1811 | LEAVE; | |
1812 | return rc; | |
1813 | } | |
1814 | ||
1815 | /** | |
1816 | * ibmvfc_bsg_request - Handle a BSG request | |
75cc8cfc | 1817 | * @job: struct bsg_job to be executed |
d31429e1 BK |
1818 | * |
1819 | * Returns: | |
1820 | * 0 on success / other on failure | |
1821 | **/ | |
75cc8cfc | 1822 | static int ibmvfc_bsg_request(struct bsg_job *job) |
d31429e1 | 1823 | { |
cd21c605 | 1824 | struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); |
1d69b122 | 1825 | struct fc_rport *rport = fc_bsg_to_rport(job); |
d31429e1 BK |
1826 | struct ibmvfc_passthru_mad *mad; |
1827 | struct ibmvfc_event *evt; | |
1828 | union ibmvfc_iu rsp_iu; | |
1829 | unsigned long flags, port_id = -1; | |
01e0e15c JT |
1830 | struct fc_bsg_request *bsg_request = job->request; |
1831 | struct fc_bsg_reply *bsg_reply = job->reply; | |
1832 | unsigned int code = bsg_request->msgcode; | |
d31429e1 BK |
1833 | int rc = 0, req_seg, rsp_seg, issue_login = 0; |
1834 | u32 fc_flags, rsp_len; | |
1835 | ||
1836 | ENTER; | |
01e0e15c | 1837 | bsg_reply->reply_payload_rcv_len = 0; |
d31429e1 BK |
1838 | if (rport) |
1839 | port_id = rport->port_id; | |
1840 | ||
1841 | switch (code) { | |
1842 | case FC_BSG_HST_ELS_NOLOGIN: | |
01e0e15c JT |
1843 | port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) | |
1844 | (bsg_request->rqst_data.h_els.port_id[1] << 8) | | |
1845 | bsg_request->rqst_data.h_els.port_id[2]; | |
d31429e1 BK |
1846 | case FC_BSG_RPT_ELS: |
1847 | fc_flags = IBMVFC_FC_ELS; | |
1848 | break; | |
1849 | case FC_BSG_HST_CT: | |
1850 | issue_login = 1; | |
01e0e15c JT |
1851 | port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) | |
1852 | (bsg_request->rqst_data.h_ct.port_id[1] << 8) | | |
1853 | bsg_request->rqst_data.h_ct.port_id[2]; | |
d31429e1 BK |
1854 | case FC_BSG_RPT_CT: |
1855 | fc_flags = IBMVFC_FC_CT_IU; | |
1856 | break; | |
1857 | default: | |
1858 | return -ENOTSUPP; | |
f36cfe6a | 1859 | } |
d31429e1 BK |
1860 | |
1861 | if (port_id == -1) | |
1862 | return -EINVAL; | |
1863 | if (!mutex_trylock(&vhost->passthru_mutex)) | |
1864 | return -EBUSY; | |
1865 | ||
1866 | job->dd_data = (void *)port_id; | |
1867 | req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, | |
1868 | job->request_payload.sg_cnt, DMA_TO_DEVICE); | |
1869 | ||
1870 | if (!req_seg) { | |
1871 | mutex_unlock(&vhost->passthru_mutex); | |
1872 | return -ENOMEM; | |
1873 | } | |
1874 | ||
1875 | rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, | |
1876 | job->reply_payload.sg_cnt, DMA_FROM_DEVICE); | |
1877 | ||
1878 | if (!rsp_seg) { | |
1879 | dma_unmap_sg(vhost->dev, job->request_payload.sg_list, | |
1880 | job->request_payload.sg_cnt, DMA_TO_DEVICE); | |
1881 | mutex_unlock(&vhost->passthru_mutex); | |
1882 | return -ENOMEM; | |
1883 | } | |
1884 | ||
1885 | if (req_seg > 1 || rsp_seg > 1) { | |
1886 | rc = -EINVAL; | |
1887 | goto out; | |
1888 | } | |
1889 | ||
1890 | if (issue_login) | |
1891 | rc = ibmvfc_bsg_plogi(vhost, port_id); | |
1892 | ||
1893 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1894 | ||
1895 | if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || | |
1896 | unlikely((rc = ibmvfc_host_chkready(vhost)))) { | |
1897 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1898 | goto out; | |
1899 | } | |
1900 | ||
1901 | evt = ibmvfc_get_event(vhost); | |
1902 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); | |
1903 | mad = &evt->iu.passthru; | |
1904 | ||
1905 | memset(mad, 0, sizeof(*mad)); | |
0aab6c3f TD |
1906 | mad->common.version = cpu_to_be32(1); |
1907 | mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); | |
1908 | mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); | |
1909 | ||
1910 | mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + | |
1911 | offsetof(struct ibmvfc_passthru_mad, iu)); | |
1912 | mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); | |
1913 | ||
1914 | mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); | |
1915 | mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); | |
1916 | mad->iu.flags = cpu_to_be32(fc_flags); | |
1917 | mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); | |
1918 | ||
1919 | mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); | |
1920 | mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); | |
1921 | mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); | |
1922 | mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); | |
1923 | mad->iu.scsi_id = cpu_to_be64(port_id); | |
1924 | mad->iu.tag = cpu_to_be64((u64)evt); | |
1925 | rsp_len = be32_to_cpu(mad->iu.rsp.len); | |
d31429e1 BK |
1926 | |
1927 | evt->sync_iu = &rsp_iu; | |
1928 | init_completion(&evt->comp); | |
1929 | rc = ibmvfc_send_event(evt, vhost, 0); | |
1930 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1931 | ||
1932 | if (rc) { | |
1933 | rc = -EIO; | |
1934 | goto out; | |
1935 | } | |
1936 | ||
1937 | wait_for_completion(&evt->comp); | |
1938 | ||
1939 | if (rsp_iu.passthru.common.status) | |
1940 | rc = -EIO; | |
1941 | else | |
01e0e15c | 1942 | bsg_reply->reply_payload_rcv_len = rsp_len; |
d31429e1 BK |
1943 | |
1944 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1945 | ibmvfc_free_event(evt); | |
1946 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
01e0e15c | 1947 | bsg_reply->result = rc; |
06548160 | 1948 | bsg_job_done(job, bsg_reply->result, |
1abaede7 | 1949 | bsg_reply->reply_payload_rcv_len); |
d31429e1 BK |
1950 | rc = 0; |
1951 | out: | |
1952 | dma_unmap_sg(vhost->dev, job->request_payload.sg_list, | |
1953 | job->request_payload.sg_cnt, DMA_TO_DEVICE); | |
1954 | dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, | |
1955 | job->reply_payload.sg_cnt, DMA_FROM_DEVICE); | |
1956 | mutex_unlock(&vhost->passthru_mutex); | |
1957 | LEAVE; | |
1958 | return rc; | |
1959 | } | |
1960 | ||
072b91f9 BK |
1961 | /** |
1962 | * ibmvfc_reset_device - Reset the device with the specified reset type | |
1963 | * @sdev: scsi device to reset | |
1964 | * @type: reset type | |
1965 | * @desc: reset type description for log messages | |
1966 | * | |
1967 | * Returns: | |
1968 | * 0 on success / other on failure | |
1969 | **/ | |
1970 | static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) | |
1971 | { | |
1972 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
1973 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
1974 | struct ibmvfc_cmd *tmf; | |
50ed9a00 | 1975 | struct ibmvfc_event *evt = NULL; |
072b91f9 BK |
1976 | union ibmvfc_iu rsp_iu; |
1977 | struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; | |
1978 | int rsp_rc = -EBUSY; | |
1979 | unsigned long flags; | |
1980 | int rsp_code = 0; | |
1981 | ||
1982 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1983 | if (vhost->state == IBMVFC_ACTIVE) { | |
1984 | evt = ibmvfc_get_event(vhost); | |
1985 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); | |
1986 | ||
1987 | tmf = &evt->iu.cmd; | |
1988 | memset(tmf, 0, sizeof(*tmf)); | |
0aab6c3f TD |
1989 | tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); |
1990 | tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); | |
1991 | tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); | |
1992 | tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); | |
1993 | tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); | |
1994 | tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); | |
1995 | tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); | |
072b91f9 | 1996 | int_to_scsilun(sdev->lun, &tmf->iu.lun); |
0aab6c3f | 1997 | tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); |
072b91f9 BK |
1998 | tmf->iu.tmf_flags = type; |
1999 | evt->sync_iu = &rsp_iu; | |
2000 | ||
2001 | init_completion(&evt->comp); | |
2002 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
2003 | } | |
2004 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2005 | ||
2006 | if (rsp_rc != 0) { | |
2007 | sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", | |
2008 | desc, rsp_rc); | |
2009 | return -EIO; | |
2010 | } | |
2011 | ||
2012 | sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); | |
2013 | wait_for_completion(&evt->comp); | |
2014 | ||
230934a6 BK |
2015 | if (rsp_iu.cmd.status) |
2016 | rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); | |
2017 | ||
2018 | if (rsp_code) { | |
072b91f9 BK |
2019 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) |
2020 | rsp_code = fc_rsp->data.info.rsp_code; | |
2021 | ||
2022 | sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " | |
0aab6c3f TD |
2023 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, |
2024 | ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), | |
072b91f9 BK |
2025 | rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, |
2026 | fc_rsp->scsi_status); | |
2027 | rsp_rc = -EIO; | |
2028 | } else | |
2029 | sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); | |
2030 | ||
2031 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2032 | ibmvfc_free_event(evt); | |
2033 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2034 | return rsp_rc; | |
2035 | } | |
2036 | ||
2037 | /** | |
d2fab5cf BK |
2038 | * ibmvfc_match_rport - Match function for specified remote port |
2039 | * @evt: ibmvfc event struct | |
2040 | * @device: device to match (rport) | |
072b91f9 BK |
2041 | * |
2042 | * Returns: | |
d2fab5cf | 2043 | * 1 if event matches rport / 0 if event does not match rport |
072b91f9 | 2044 | **/ |
d2fab5cf | 2045 | static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) |
072b91f9 | 2046 | { |
d2fab5cf | 2047 | struct fc_rport *cmd_rport; |
072b91f9 | 2048 | |
d2fab5cf BK |
2049 | if (evt->cmnd) { |
2050 | cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); | |
2051 | if (cmd_rport == rport) | |
2052 | return 1; | |
072b91f9 | 2053 | } |
d2fab5cf BK |
2054 | return 0; |
2055 | } | |
072b91f9 | 2056 | |
d2fab5cf BK |
2057 | /** |
2058 | * ibmvfc_match_target - Match function for specified target | |
2059 | * @evt: ibmvfc event struct | |
2060 | * @device: device to match (starget) | |
2061 | * | |
2062 | * Returns: | |
2063 | * 1 if event matches starget / 0 if event does not match starget | |
2064 | **/ | |
2065 | static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) | |
2066 | { | |
2067 | if (evt->cmnd && scsi_target(evt->cmnd->device) == device) | |
2068 | return 1; | |
2069 | return 0; | |
2070 | } | |
072b91f9 | 2071 | |
d2fab5cf BK |
2072 | /** |
2073 | * ibmvfc_match_lun - Match function for specified LUN | |
2074 | * @evt: ibmvfc event struct | |
2075 | * @device: device to match (sdev) | |
2076 | * | |
2077 | * Returns: | |
2078 | * 1 if event matches sdev / 0 if event does not match sdev | |
2079 | **/ | |
2080 | static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) | |
2081 | { | |
2082 | if (evt->cmnd && evt->cmnd->device == device) | |
2083 | return 1; | |
2084 | return 0; | |
2085 | } | |
072b91f9 | 2086 | |
d2fab5cf BK |
2087 | /** |
2088 | * ibmvfc_wait_for_ops - Wait for ops to complete | |
2089 | * @vhost: ibmvfc host struct | |
2090 | * @device: device to match (starget or sdev) | |
2091 | * @match: match function | |
2092 | * | |
2093 | * Returns: | |
2094 | * SUCCESS / FAILED | |
2095 | **/ | |
2096 | static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, | |
2097 | int (*match) (struct ibmvfc_event *, void *)) | |
2098 | { | |
2099 | struct ibmvfc_event *evt; | |
2100 | DECLARE_COMPLETION_ONSTACK(comp); | |
2101 | int wait; | |
2102 | unsigned long flags; | |
2103 | signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; | |
072b91f9 | 2104 | |
d2fab5cf BK |
2105 | ENTER; |
2106 | do { | |
2107 | wait = 0; | |
2108 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2109 | list_for_each_entry(evt, &vhost->sent, queue) { | |
2110 | if (match(evt, device)) { | |
2111 | evt->eh_comp = ∁ | |
2112 | wait++; | |
2113 | } | |
2114 | } | |
2115 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
230934a6 | 2116 | |
d2fab5cf BK |
2117 | if (wait) { |
2118 | timeout = wait_for_completion_timeout(&comp, timeout); | |
072b91f9 | 2119 | |
d2fab5cf BK |
2120 | if (!timeout) { |
2121 | wait = 0; | |
2122 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2123 | list_for_each_entry(evt, &vhost->sent, queue) { | |
2124 | if (match(evt, device)) { | |
2125 | evt->eh_comp = NULL; | |
2126 | wait++; | |
2127 | } | |
2128 | } | |
2129 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2130 | if (wait) | |
2131 | dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); | |
2132 | LEAVE; | |
2133 | return wait ? FAILED : SUCCESS; | |
2134 | } | |
2135 | } | |
2136 | } while (wait); | |
072b91f9 | 2137 | |
d2fab5cf BK |
2138 | LEAVE; |
2139 | return SUCCESS; | |
072b91f9 BK |
2140 | } |
2141 | ||
2142 | /** | |
2143 | * ibmvfc_cancel_all - Cancel all outstanding commands to the device | |
2144 | * @sdev: scsi device to cancel commands | |
2145 | * @type: type of error recovery being performed | |
2146 | * | |
2147 | * This sends a cancel to the VIOS for the specified device. This does | |
2148 | * NOT send any abort to the actual device. That must be done separately. | |
2149 | * | |
2150 | * Returns: | |
2151 | * 0 on success / other on failure | |
2152 | **/ | |
2153 | static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) | |
2154 | { | |
2155 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
ad8dcffa BK |
2156 | struct scsi_target *starget = scsi_target(sdev); |
2157 | struct fc_rport *rport = starget_to_rport(starget); | |
072b91f9 BK |
2158 | struct ibmvfc_tmf *tmf; |
2159 | struct ibmvfc_event *evt, *found_evt; | |
2160 | union ibmvfc_iu rsp; | |
2161 | int rsp_rc = -EBUSY; | |
2162 | unsigned long flags; | |
2163 | u16 status; | |
2164 | ||
2165 | ENTER; | |
2166 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2167 | found_evt = NULL; | |
2168 | list_for_each_entry(evt, &vhost->sent, queue) { | |
2169 | if (evt->cmnd && evt->cmnd->device == sdev) { | |
2170 | found_evt = evt; | |
2171 | break; | |
2172 | } | |
2173 | } | |
2174 | ||
2175 | if (!found_evt) { | |
2176 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
2177 | sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); | |
2178 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2179 | return 0; | |
2180 | } | |
2181 | ||
55d29bf0 | 2182 | if (vhost->logged_in) { |
072b91f9 BK |
2183 | evt = ibmvfc_get_event(vhost); |
2184 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); | |
2185 | ||
2186 | tmf = &evt->iu.tmf; | |
2187 | memset(tmf, 0, sizeof(*tmf)); | |
0aab6c3f TD |
2188 | tmf->common.version = cpu_to_be32(1); |
2189 | tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); | |
2190 | tmf->common.length = cpu_to_be16(sizeof(*tmf)); | |
2191 | tmf->scsi_id = cpu_to_be64(rport->port_id); | |
072b91f9 | 2192 | int_to_scsilun(sdev->lun, &tmf->lun); |
0aab6c3f | 2193 | if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS)) |
90f725db | 2194 | type &= ~IBMVFC_TMF_SUPPRESS_ABTS; |
55d29bf0 | 2195 | if (vhost->state == IBMVFC_ACTIVE) |
0aab6c3f | 2196 | tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); |
55d29bf0 | 2197 | else |
0aab6c3f TD |
2198 | tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); |
2199 | tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); | |
2200 | tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); | |
072b91f9 BK |
2201 | |
2202 | evt->sync_iu = &rsp; | |
2203 | init_completion(&evt->comp); | |
2204 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
2205 | } | |
2206 | ||
2207 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2208 | ||
2209 | if (rsp_rc != 0) { | |
2210 | sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); | |
c281e32a BK |
2211 | /* If failure is received, the host adapter is most likely going |
2212 | through reset, return success so the caller will wait for the command | |
2213 | being cancelled to get returned */ | |
2214 | return 0; | |
072b91f9 BK |
2215 | } |
2216 | ||
2217 | sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); | |
2218 | ||
2219 | wait_for_completion(&evt->comp); | |
0aab6c3f | 2220 | status = be16_to_cpu(rsp.mad_common.status); |
072b91f9 BK |
2221 | spin_lock_irqsave(vhost->host->host_lock, flags); |
2222 | ibmvfc_free_event(evt); | |
2223 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2224 | ||
2225 | if (status != IBMVFC_MAD_SUCCESS) { | |
2226 | sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); | |
c281e32a BK |
2227 | switch (status) { |
2228 | case IBMVFC_MAD_DRIVER_FAILED: | |
2229 | case IBMVFC_MAD_CRQ_ERROR: | |
2230 | /* Host adapter most likely going through reset, return success to | |
2231 | the caller will wait for the command being cancelled to get returned */ | |
2232 | return 0; | |
2233 | default: | |
2234 | return -EIO; | |
2235 | }; | |
072b91f9 BK |
2236 | } |
2237 | ||
2238 | sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); | |
2239 | return 0; | |
2240 | } | |
2241 | ||
ad8dcffa | 2242 | /** |
d2fab5cf | 2243 | * ibmvfc_match_key - Match function for specified cancel key |
ad8dcffa | 2244 | * @evt: ibmvfc event struct |
d2fab5cf | 2245 | * @key: cancel key to match |
ad8dcffa BK |
2246 | * |
2247 | * Returns: | |
d2fab5cf | 2248 | * 1 if event matches key / 0 if event does not match key |
ad8dcffa | 2249 | **/ |
d2fab5cf | 2250 | static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) |
ad8dcffa | 2251 | { |
d2fab5cf | 2252 | unsigned long cancel_key = (unsigned long)key; |
ad8dcffa | 2253 | |
d2fab5cf | 2254 | if (evt->crq.format == IBMVFC_CMD_FORMAT && |
0aab6c3f | 2255 | be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) |
ad8dcffa BK |
2256 | return 1; |
2257 | return 0; | |
2258 | } | |
2259 | ||
a077c7fa BK |
2260 | /** |
2261 | * ibmvfc_match_evt - Match function for specified event | |
2262 | * @evt: ibmvfc event struct | |
2263 | * @match: event to match | |
2264 | * | |
2265 | * Returns: | |
2266 | * 1 if event matches key / 0 if event does not match key | |
2267 | **/ | |
2268 | static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) | |
2269 | { | |
2270 | if (evt == match) | |
2271 | return 1; | |
2272 | return 0; | |
2273 | } | |
2274 | ||
ad8dcffa | 2275 | /** |
d2fab5cf BK |
2276 | * ibmvfc_abort_task_set - Abort outstanding commands to the device |
2277 | * @sdev: scsi device to abort commands | |
2278 | * | |
2279 | * This sends an Abort Task Set to the VIOS for the specified device. This does | |
2280 | * NOT send any cancel to the VIOS. That must be done separately. | |
ad8dcffa BK |
2281 | * |
2282 | * Returns: | |
d2fab5cf | 2283 | * 0 on success / other on failure |
ad8dcffa | 2284 | **/ |
d2fab5cf | 2285 | static int ibmvfc_abort_task_set(struct scsi_device *sdev) |
ad8dcffa | 2286 | { |
d2fab5cf BK |
2287 | struct ibmvfc_host *vhost = shost_priv(sdev->host); |
2288 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
2289 | struct ibmvfc_cmd *tmf; | |
2290 | struct ibmvfc_event *evt, *found_evt; | |
2291 | union ibmvfc_iu rsp_iu; | |
2292 | struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; | |
2293 | int rc, rsp_rc = -EBUSY; | |
2294 | unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; | |
2295 | int rsp_code = 0; | |
ad8dcffa | 2296 | |
d2fab5cf BK |
2297 | spin_lock_irqsave(vhost->host->host_lock, flags); |
2298 | found_evt = NULL; | |
2299 | list_for_each_entry(evt, &vhost->sent, queue) { | |
2300 | if (evt->cmnd && evt->cmnd->device == sdev) { | |
2301 | found_evt = evt; | |
2302 | break; | |
ad8dcffa | 2303 | } |
d2fab5cf BK |
2304 | } |
2305 | ||
2306 | if (!found_evt) { | |
2307 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
2308 | sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); | |
ad8dcffa | 2309 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
d2fab5cf BK |
2310 | return 0; |
2311 | } | |
ad8dcffa | 2312 | |
d2fab5cf BK |
2313 | if (vhost->state == IBMVFC_ACTIVE) { |
2314 | evt = ibmvfc_get_event(vhost); | |
2315 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); | |
ad8dcffa | 2316 | |
d2fab5cf BK |
2317 | tmf = &evt->iu.cmd; |
2318 | memset(tmf, 0, sizeof(*tmf)); | |
0aab6c3f TD |
2319 | tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); |
2320 | tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); | |
2321 | tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); | |
2322 | tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); | |
2323 | tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); | |
2324 | tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); | |
2325 | tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); | |
d2fab5cf | 2326 | int_to_scsilun(sdev->lun, &tmf->iu.lun); |
0aab6c3f | 2327 | tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); |
d2fab5cf BK |
2328 | tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; |
2329 | evt->sync_iu = &rsp_iu; | |
2330 | ||
2331 | init_completion(&evt->comp); | |
2332 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
2333 | } | |
2334 | ||
2335 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2336 | ||
2337 | if (rsp_rc != 0) { | |
2338 | sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); | |
2339 | return -EIO; | |
2340 | } | |
2341 | ||
2342 | sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); | |
2343 | timeout = wait_for_completion_timeout(&evt->comp, timeout); | |
2344 | ||
2345 | if (!timeout) { | |
f8804b72 | 2346 | rc = ibmvfc_cancel_all(sdev, 0); |
d2fab5cf BK |
2347 | if (!rc) { |
2348 | rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); | |
2349 | if (rc == SUCCESS) | |
2350 | rc = 0; | |
ad8dcffa | 2351 | } |
ad8dcffa | 2352 | |
d2fab5cf BK |
2353 | if (rc) { |
2354 | sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); | |
2355 | ibmvfc_reset_host(vhost); | |
a077c7fa BK |
2356 | rsp_rc = -EIO; |
2357 | rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); | |
2358 | ||
2359 | if (rc == SUCCESS) | |
2360 | rsp_rc = 0; | |
2361 | ||
2362 | rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); | |
2363 | if (rc != SUCCESS) { | |
2364 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2365 | ibmvfc_hard_reset_host(vhost); | |
2366 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2367 | rsp_rc = 0; | |
2368 | } | |
2369 | ||
d2fab5cf BK |
2370 | goto out; |
2371 | } | |
2372 | } | |
2373 | ||
2374 | if (rsp_iu.cmd.status) | |
2375 | rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); | |
2376 | ||
2377 | if (rsp_code) { | |
2378 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) | |
2379 | rsp_code = fc_rsp->data.info.rsp_code; | |
2380 | ||
2381 | sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " | |
2382 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", | |
0aab6c3f | 2383 | ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), |
d2fab5cf BK |
2384 | rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, |
2385 | fc_rsp->scsi_status); | |
2386 | rsp_rc = -EIO; | |
2387 | } else | |
2388 | sdev_printk(KERN_INFO, sdev, "Abort successful\n"); | |
2389 | ||
2390 | out: | |
2391 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2392 | ibmvfc_free_event(evt); | |
2393 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2394 | return rsp_rc; | |
ad8dcffa BK |
2395 | } |
2396 | ||
072b91f9 BK |
2397 | /** |
2398 | * ibmvfc_eh_abort_handler - Abort a command | |
2399 | * @cmd: scsi command to abort | |
2400 | * | |
2401 | * Returns: | |
93631b4a | 2402 | * SUCCESS / FAST_IO_FAIL / FAILED |
072b91f9 BK |
2403 | **/ |
2404 | static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) | |
2405 | { | |
ad8dcffa BK |
2406 | struct scsi_device *sdev = cmd->device; |
2407 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
55d29bf0 | 2408 | int cancel_rc, block_rc; |
ad8dcffa | 2409 | int rc = FAILED; |
072b91f9 BK |
2410 | |
2411 | ENTER; | |
93631b4a | 2412 | block_rc = fc_block_scsi_eh(cmd); |
072b91f9 | 2413 | ibmvfc_wait_while_resetting(vhost); |
93631b4a BK |
2414 | if (block_rc != FAST_IO_FAIL) { |
2415 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); | |
55d29bf0 | 2416 | ibmvfc_abort_task_set(sdev); |
93631b4a | 2417 | } else |
90f725db | 2418 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); |
072b91f9 | 2419 | |
55d29bf0 | 2420 | if (!cancel_rc) |
ad8dcffa | 2421 | rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); |
072b91f9 | 2422 | |
93631b4a BK |
2423 | if (block_rc == FAST_IO_FAIL && rc != FAILED) |
2424 | rc = FAST_IO_FAIL; | |
2425 | ||
072b91f9 | 2426 | LEAVE; |
ad8dcffa | 2427 | return rc; |
072b91f9 BK |
2428 | } |
2429 | ||
2430 | /** | |
2431 | * ibmvfc_eh_device_reset_handler - Reset a single LUN | |
2432 | * @cmd: scsi command struct | |
2433 | * | |
2434 | * Returns: | |
93631b4a | 2435 | * SUCCESS / FAST_IO_FAIL / FAILED |
072b91f9 BK |
2436 | **/ |
2437 | static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) | |
2438 | { | |
ad8dcffa BK |
2439 | struct scsi_device *sdev = cmd->device; |
2440 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
93631b4a | 2441 | int cancel_rc, block_rc, reset_rc = 0; |
ad8dcffa | 2442 | int rc = FAILED; |
072b91f9 BK |
2443 | |
2444 | ENTER; | |
93631b4a | 2445 | block_rc = fc_block_scsi_eh(cmd); |
072b91f9 | 2446 | ibmvfc_wait_while_resetting(vhost); |
93631b4a BK |
2447 | if (block_rc != FAST_IO_FAIL) { |
2448 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); | |
2449 | reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); | |
2450 | } else | |
90f725db | 2451 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); |
072b91f9 | 2452 | |
ad8dcffa BK |
2453 | if (!cancel_rc && !reset_rc) |
2454 | rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); | |
072b91f9 | 2455 | |
93631b4a BK |
2456 | if (block_rc == FAST_IO_FAIL && rc != FAILED) |
2457 | rc = FAST_IO_FAIL; | |
2458 | ||
072b91f9 | 2459 | LEAVE; |
ad8dcffa | 2460 | return rc; |
072b91f9 BK |
2461 | } |
2462 | ||
93631b4a BK |
2463 | /** |
2464 | * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function | |
2465 | * @sdev: scsi device struct | |
2466 | * @data: return code | |
2467 | * | |
2468 | **/ | |
2469 | static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) | |
2470 | { | |
2471 | unsigned long *rc = data; | |
90f725db | 2472 | *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); |
93631b4a BK |
2473 | } |
2474 | ||
4a5c4a5e BK |
2475 | /** |
2476 | * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function | |
2477 | * @sdev: scsi device struct | |
2478 | * @data: return code | |
2479 | * | |
2480 | **/ | |
2481 | static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) | |
072b91f9 BK |
2482 | { |
2483 | unsigned long *rc = data; | |
2484 | *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); | |
2485 | } | |
2486 | ||
072b91f9 BK |
2487 | /** |
2488 | * ibmvfc_eh_target_reset_handler - Reset the target | |
2489 | * @cmd: scsi command struct | |
2490 | * | |
2491 | * Returns: | |
93631b4a | 2492 | * SUCCESS / FAST_IO_FAIL / FAILED |
072b91f9 BK |
2493 | **/ |
2494 | static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) | |
2495 | { | |
ad8dcffa BK |
2496 | struct scsi_device *sdev = cmd->device; |
2497 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
2498 | struct scsi_target *starget = scsi_target(sdev); | |
93631b4a BK |
2499 | int block_rc; |
2500 | int reset_rc = 0; | |
ad8dcffa | 2501 | int rc = FAILED; |
072b91f9 | 2502 | unsigned long cancel_rc = 0; |
072b91f9 BK |
2503 | |
2504 | ENTER; | |
93631b4a | 2505 | block_rc = fc_block_scsi_eh(cmd); |
072b91f9 | 2506 | ibmvfc_wait_while_resetting(vhost); |
93631b4a BK |
2507 | if (block_rc != FAST_IO_FAIL) { |
2508 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); | |
2509 | reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); | |
2510 | } else | |
2511 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); | |
072b91f9 | 2512 | |
ad8dcffa BK |
2513 | if (!cancel_rc && !reset_rc) |
2514 | rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); | |
072b91f9 | 2515 | |
93631b4a BK |
2516 | if (block_rc == FAST_IO_FAIL && rc != FAILED) |
2517 | rc = FAST_IO_FAIL; | |
2518 | ||
072b91f9 | 2519 | LEAVE; |
ad8dcffa | 2520 | return rc; |
072b91f9 BK |
2521 | } |
2522 | ||
2523 | /** | |
2524 | * ibmvfc_eh_host_reset_handler - Reset the connection to the server | |
2525 | * @cmd: struct scsi_cmnd having problems | |
2526 | * | |
2527 | **/ | |
2528 | static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) | |
2529 | { | |
8d8a3f59 | 2530 | int rc; |
072b91f9 BK |
2531 | struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
2532 | ||
2533 | dev_err(vhost->dev, "Resetting connection due to error recovery\n"); | |
2534 | rc = ibmvfc_issue_fc_host_lip(vhost->host); | |
93631b4a | 2535 | |
072b91f9 BK |
2536 | return rc ? FAILED : SUCCESS; |
2537 | } | |
2538 | ||
2539 | /** | |
2540 | * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. | |
2541 | * @rport: rport struct | |
2542 | * | |
2543 | * Return value: | |
2544 | * none | |
2545 | **/ | |
2546 | static void ibmvfc_terminate_rport_io(struct fc_rport *rport) | |
2547 | { | |
d2fab5cf | 2548 | struct Scsi_Host *shost = rport_to_shost(rport); |
072b91f9 | 2549 | struct ibmvfc_host *vhost = shost_priv(shost); |
d2fab5cf BK |
2550 | struct fc_rport *dev_rport; |
2551 | struct scsi_device *sdev; | |
2552 | unsigned long rc; | |
072b91f9 BK |
2553 | |
2554 | ENTER; | |
d2fab5cf BK |
2555 | shost_for_each_device(sdev, shost) { |
2556 | dev_rport = starget_to_rport(scsi_target(sdev)); | |
2557 | if (dev_rport != rport) | |
2558 | continue; | |
90f725db | 2559 | ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); |
d2fab5cf | 2560 | } |
072b91f9 | 2561 | |
d2fab5cf | 2562 | rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); |
ad8dcffa BK |
2563 | |
2564 | if (rc == FAILED) | |
072b91f9 | 2565 | ibmvfc_issue_fc_host_lip(shost); |
072b91f9 BK |
2566 | LEAVE; |
2567 | } | |
2568 | ||
d99e5f48 | 2569 | static const struct ibmvfc_async_desc ae_desc [] = { |
402c6eec RJ |
2570 | { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, |
2571 | { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, | |
2572 | { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, | |
2573 | { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, | |
2574 | { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, | |
2575 | { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, | |
2576 | { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, | |
2577 | { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, | |
2578 | { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, | |
2579 | { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, | |
2580 | { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, | |
2581 | { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, | |
2582 | { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, | |
072b91f9 BK |
2583 | }; |
2584 | ||
d99e5f48 | 2585 | static const struct ibmvfc_async_desc unknown_ae = { |
402c6eec | 2586 | "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL |
d99e5f48 | 2587 | }; |
072b91f9 BK |
2588 | |
2589 | /** | |
2590 | * ibmvfc_get_ae_desc - Get text description for async event | |
2591 | * @ae: async event | |
2592 | * | |
2593 | **/ | |
d99e5f48 | 2594 | static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) |
072b91f9 BK |
2595 | { |
2596 | int i; | |
2597 | ||
2598 | for (i = 0; i < ARRAY_SIZE(ae_desc); i++) | |
2599 | if (ae_desc[i].ae == ae) | |
d99e5f48 BK |
2600 | return &ae_desc[i]; |
2601 | ||
2602 | return &unknown_ae; | |
2603 | } | |
2604 | ||
2605 | static const struct { | |
2606 | enum ibmvfc_ae_link_state state; | |
2607 | const char *desc; | |
2608 | } link_desc [] = { | |
2609 | { IBMVFC_AE_LS_LINK_UP, " link up" }, | |
2610 | { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, | |
2611 | { IBMVFC_AE_LS_LINK_DOWN, " link down" }, | |
2612 | { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, | |
2613 | }; | |
2614 | ||
2615 | /** | |
2616 | * ibmvfc_get_link_state - Get text description for link state | |
2617 | * @state: link state | |
2618 | * | |
2619 | **/ | |
2620 | static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) | |
2621 | { | |
2622 | int i; | |
2623 | ||
2624 | for (i = 0; i < ARRAY_SIZE(link_desc); i++) | |
2625 | if (link_desc[i].state == state) | |
2626 | return link_desc[i].desc; | |
072b91f9 | 2627 | |
d99e5f48 | 2628 | return ""; |
072b91f9 BK |
2629 | } |
2630 | ||
2631 | /** | |
2632 | * ibmvfc_handle_async - Handle an async event from the adapter | |
2633 | * @crq: crq to process | |
2634 | * @vhost: ibmvfc host struct | |
2635 | * | |
2636 | **/ | |
2637 | static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, | |
2638 | struct ibmvfc_host *vhost) | |
2639 | { | |
0aab6c3f | 2640 | const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); |
6d29cc56 | 2641 | struct ibmvfc_target *tgt; |
072b91f9 | 2642 | |
d99e5f48 | 2643 | ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," |
21367e20 TD |
2644 | " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id), |
2645 | be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name), | |
d99e5f48 | 2646 | ibmvfc_get_link_state(crq->link_state)); |
072b91f9 | 2647 | |
0aab6c3f | 2648 | switch (be64_to_cpu(crq->event)) { |
072b91f9 | 2649 | case IBMVFC_AE_RESUME: |
497f9c50 BK |
2650 | switch (crq->link_state) { |
2651 | case IBMVFC_AE_LS_LINK_DOWN: | |
2652 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
2653 | break; | |
2654 | case IBMVFC_AE_LS_LINK_DEAD: | |
2655 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
2656 | break; | |
2657 | case IBMVFC_AE_LS_LINK_UP: | |
2658 | case IBMVFC_AE_LS_LINK_BOUNCED: | |
2659 | default: | |
2660 | vhost->events_to_log |= IBMVFC_AE_LINKUP; | |
2661 | vhost->delay_init = 1; | |
2662 | __ibmvfc_reset_host(vhost); | |
2663 | break; | |
f36cfe6a | 2664 | } |
497f9c50 BK |
2665 | |
2666 | break; | |
2667 | case IBMVFC_AE_LINK_UP: | |
072b91f9 | 2668 | vhost->events_to_log |= IBMVFC_AE_LINKUP; |
d2131b33 BK |
2669 | vhost->delay_init = 1; |
2670 | __ibmvfc_reset_host(vhost); | |
072b91f9 BK |
2671 | break; |
2672 | case IBMVFC_AE_SCN_FABRIC: | |
d2131b33 | 2673 | case IBMVFC_AE_SCN_DOMAIN: |
072b91f9 | 2674 | vhost->events_to_log |= IBMVFC_AE_RSCN; |
5cdf1626 BK |
2675 | if (vhost->state < IBMVFC_HALTED) { |
2676 | vhost->delay_init = 1; | |
2677 | __ibmvfc_reset_host(vhost); | |
2678 | } | |
072b91f9 BK |
2679 | break; |
2680 | case IBMVFC_AE_SCN_NPORT: | |
2681 | case IBMVFC_AE_SCN_GROUP: | |
072b91f9 | 2682 | vhost->events_to_log |= IBMVFC_AE_RSCN; |
6d29cc56 BK |
2683 | ibmvfc_reinit_host(vhost); |
2684 | break; | |
072b91f9 BK |
2685 | case IBMVFC_AE_ELS_LOGO: |
2686 | case IBMVFC_AE_ELS_PRLO: | |
2687 | case IBMVFC_AE_ELS_PLOGI: | |
6d29cc56 BK |
2688 | list_for_each_entry(tgt, &vhost->targets, queue) { |
2689 | if (!crq->scsi_id && !crq->wwpn && !crq->node_name) | |
2690 | break; | |
0aab6c3f | 2691 | if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) |
6d29cc56 | 2692 | continue; |
0aab6c3f | 2693 | if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) |
6d29cc56 | 2694 | continue; |
0aab6c3f | 2695 | if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) |
6d29cc56 | 2696 | continue; |
0aab6c3f | 2697 | if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) |
017b2ae3 | 2698 | tgt->logo_rcvd = 1; |
0aab6c3f | 2699 | if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { |
017b2ae3 BK |
2700 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
2701 | ibmvfc_reinit_host(vhost); | |
2702 | } | |
6d29cc56 | 2703 | } |
072b91f9 BK |
2704 | break; |
2705 | case IBMVFC_AE_LINK_DOWN: | |
2706 | case IBMVFC_AE_ADAPTER_FAILED: | |
2707 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
2708 | break; | |
2709 | case IBMVFC_AE_LINK_DEAD: | |
2710 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
2711 | break; | |
2712 | case IBMVFC_AE_HALT: | |
2713 | ibmvfc_link_down(vhost, IBMVFC_HALTED); | |
2714 | break; | |
2715 | default: | |
775a42ec | 2716 | dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); |
072b91f9 | 2717 | break; |
f36cfe6a | 2718 | } |
072b91f9 BK |
2719 | } |
2720 | ||
2721 | /** | |
2722 | * ibmvfc_handle_crq - Handles and frees received events in the CRQ | |
2723 | * @crq: Command/Response queue | |
2724 | * @vhost: ibmvfc host struct | |
2725 | * | |
2726 | **/ | |
2727 | static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) | |
2728 | { | |
2729 | long rc; | |
0aab6c3f | 2730 | struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); |
072b91f9 BK |
2731 | |
2732 | switch (crq->valid) { | |
2733 | case IBMVFC_CRQ_INIT_RSP: | |
2734 | switch (crq->format) { | |
2735 | case IBMVFC_CRQ_INIT: | |
2736 | dev_info(vhost->dev, "Partner initialized\n"); | |
2737 | /* Send back a response */ | |
2738 | rc = ibmvfc_send_crq_init_complete(vhost); | |
2739 | if (rc == 0) | |
861890c6 | 2740 | ibmvfc_init_host(vhost); |
072b91f9 BK |
2741 | else |
2742 | dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); | |
2743 | break; | |
2744 | case IBMVFC_CRQ_INIT_COMPLETE: | |
2745 | dev_info(vhost->dev, "Partner initialization complete\n"); | |
861890c6 | 2746 | ibmvfc_init_host(vhost); |
072b91f9 BK |
2747 | break; |
2748 | default: | |
2749 | dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); | |
2750 | } | |
2751 | return; | |
2752 | case IBMVFC_CRQ_XPORT_EVENT: | |
2753 | vhost->state = IBMVFC_NO_CRQ; | |
79111d08 | 2754 | vhost->logged_in = 0; |
072b91f9 BK |
2755 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
2756 | if (crq->format == IBMVFC_PARTITION_MIGRATED) { | |
2757 | /* We need to re-setup the interpartition connection */ | |
2758 | dev_info(vhost->dev, "Re-enabling adapter\n"); | |
2759 | vhost->client_migrated = 1; | |
2760 | ibmvfc_purge_requests(vhost, DID_REQUEUE); | |
73ee5d86 BK |
2761 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
2762 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); | |
072b91f9 BK |
2763 | } else { |
2764 | dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); | |
072b91f9 | 2765 | ibmvfc_purge_requests(vhost, DID_ERROR); |
73ee5d86 BK |
2766 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
2767 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); | |
072b91f9 BK |
2768 | } |
2769 | return; | |
2770 | case IBMVFC_CRQ_CMD_RSP: | |
2771 | break; | |
2772 | default: | |
2773 | dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); | |
2774 | return; | |
2775 | } | |
2776 | ||
2777 | if (crq->format == IBMVFC_ASYNC_EVENT) | |
2778 | return; | |
2779 | ||
2780 | /* The only kind of payload CRQs we should get are responses to | |
2781 | * things we send. Make sure this response is to something we | |
2782 | * actually sent | |
2783 | */ | |
2784 | if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { | |
775a42ec | 2785 | dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", |
072b91f9 BK |
2786 | crq->ioba); |
2787 | return; | |
2788 | } | |
2789 | ||
2790 | if (unlikely(atomic_read(&evt->free))) { | |
775a42ec | 2791 | dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", |
072b91f9 BK |
2792 | crq->ioba); |
2793 | return; | |
2794 | } | |
2795 | ||
2796 | del_timer(&evt->timer); | |
2797 | list_del(&evt->queue); | |
2798 | ibmvfc_trc_end(evt); | |
2799 | evt->done(evt); | |
2800 | } | |
2801 | ||
2802 | /** | |
2803 | * ibmvfc_scan_finished - Check if the device scan is done. | |
2804 | * @shost: scsi host struct | |
2805 | * @time: current elapsed time | |
2806 | * | |
2807 | * Returns: | |
2808 | * 0 if scan is not done / 1 if scan is done | |
2809 | **/ | |
2810 | static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) | |
2811 | { | |
2812 | unsigned long flags; | |
2813 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2814 | int done = 0; | |
2815 | ||
2816 | spin_lock_irqsave(shost->host_lock, flags); | |
2817 | if (time >= (init_timeout * HZ)) { | |
2818 | dev_info(vhost->dev, "Scan taking longer than %d seconds, " | |
2819 | "continuing initialization\n", init_timeout); | |
2820 | done = 1; | |
2821 | } | |
2822 | ||
43c8da90 | 2823 | if (vhost->scan_complete) |
072b91f9 BK |
2824 | done = 1; |
2825 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2826 | return done; | |
2827 | } | |
2828 | ||
2829 | /** | |
2830 | * ibmvfc_slave_alloc - Setup the device's task set value | |
2831 | * @sdev: struct scsi_device device to configure | |
2832 | * | |
2833 | * Set the device's task set value so that error handling works as | |
2834 | * expected. | |
2835 | * | |
2836 | * Returns: | |
2837 | * 0 on success / -ENXIO if device does not exist | |
2838 | **/ | |
2839 | static int ibmvfc_slave_alloc(struct scsi_device *sdev) | |
2840 | { | |
2841 | struct Scsi_Host *shost = sdev->host; | |
2842 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
2843 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2844 | unsigned long flags = 0; | |
2845 | ||
2846 | if (!rport || fc_remote_port_chkready(rport)) | |
2847 | return -ENXIO; | |
2848 | ||
2849 | spin_lock_irqsave(shost->host_lock, flags); | |
2850 | sdev->hostdata = (void *)(unsigned long)vhost->task_set++; | |
2851 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2852 | return 0; | |
2853 | } | |
2854 | ||
ad8dcffa BK |
2855 | /** |
2856 | * ibmvfc_target_alloc - Setup the target's task set value | |
2857 | * @starget: struct scsi_target | |
2858 | * | |
2859 | * Set the target's task set value so that error handling works as | |
2860 | * expected. | |
2861 | * | |
2862 | * Returns: | |
2863 | * 0 on success / -ENXIO if device does not exist | |
2864 | **/ | |
2865 | static int ibmvfc_target_alloc(struct scsi_target *starget) | |
2866 | { | |
2867 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2868 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2869 | unsigned long flags = 0; | |
2870 | ||
2871 | spin_lock_irqsave(shost->host_lock, flags); | |
2872 | starget->hostdata = (void *)(unsigned long)vhost->task_set++; | |
2873 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2874 | return 0; | |
2875 | } | |
2876 | ||
072b91f9 BK |
2877 | /** |
2878 | * ibmvfc_slave_configure - Configure the device | |
2879 | * @sdev: struct scsi_device device to configure | |
2880 | * | |
2881 | * Enable allow_restart for a device if it is a disk. Adjust the | |
2882 | * queue_depth here also. | |
2883 | * | |
2884 | * Returns: | |
2885 | * 0 | |
2886 | **/ | |
2887 | static int ibmvfc_slave_configure(struct scsi_device *sdev) | |
2888 | { | |
2889 | struct Scsi_Host *shost = sdev->host; | |
072b91f9 BK |
2890 | unsigned long flags = 0; |
2891 | ||
2892 | spin_lock_irqsave(shost->host_lock, flags); | |
2893 | if (sdev->type == TYPE_DISK) | |
2894 | sdev->allow_restart = 1; | |
072b91f9 BK |
2895 | spin_unlock_irqrestore(shost->host_lock, flags); |
2896 | return 0; | |
2897 | } | |
2898 | ||
2899 | /** | |
2900 | * ibmvfc_change_queue_depth - Change the device's queue depth | |
2901 | * @sdev: scsi device struct | |
2902 | * @qdepth: depth to set | |
e881a172 | 2903 | * @reason: calling context |
072b91f9 BK |
2904 | * |
2905 | * Return value: | |
2906 | * actual depth set | |
2907 | **/ | |
db5ed4df | 2908 | static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) |
072b91f9 BK |
2909 | { |
2910 | if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) | |
2911 | qdepth = IBMVFC_MAX_CMDS_PER_LUN; | |
2912 | ||
db5ed4df | 2913 | return scsi_change_queue_depth(sdev, qdepth); |
072b91f9 BK |
2914 | } |
2915 | ||
072b91f9 BK |
2916 | static ssize_t ibmvfc_show_host_partition_name(struct device *dev, |
2917 | struct device_attribute *attr, char *buf) | |
2918 | { | |
2919 | struct Scsi_Host *shost = class_to_shost(dev); | |
2920 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2921 | ||
2922 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2923 | vhost->login_buf->resp.partition_name); | |
2924 | } | |
2925 | ||
072b91f9 BK |
2926 | static ssize_t ibmvfc_show_host_device_name(struct device *dev, |
2927 | struct device_attribute *attr, char *buf) | |
2928 | { | |
2929 | struct Scsi_Host *shost = class_to_shost(dev); | |
2930 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2931 | ||
2932 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2933 | vhost->login_buf->resp.device_name); | |
2934 | } | |
2935 | ||
072b91f9 BK |
2936 | static ssize_t ibmvfc_show_host_loc_code(struct device *dev, |
2937 | struct device_attribute *attr, char *buf) | |
2938 | { | |
2939 | struct Scsi_Host *shost = class_to_shost(dev); | |
2940 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2941 | ||
2942 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2943 | vhost->login_buf->resp.port_loc_code); | |
2944 | } | |
2945 | ||
072b91f9 BK |
2946 | static ssize_t ibmvfc_show_host_drc_name(struct device *dev, |
2947 | struct device_attribute *attr, char *buf) | |
2948 | { | |
2949 | struct Scsi_Host *shost = class_to_shost(dev); | |
2950 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2951 | ||
2952 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2953 | vhost->login_buf->resp.drc_name); | |
2954 | } | |
2955 | ||
072b91f9 BK |
2956 | static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, |
2957 | struct device_attribute *attr, char *buf) | |
2958 | { | |
2959 | struct Scsi_Host *shost = class_to_shost(dev); | |
2960 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2961 | return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); | |
2962 | } | |
2963 | ||
497f9c50 BK |
2964 | static ssize_t ibmvfc_show_host_capabilities(struct device *dev, |
2965 | struct device_attribute *attr, char *buf) | |
2966 | { | |
2967 | struct Scsi_Host *shost = class_to_shost(dev); | |
2968 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2969 | return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); | |
2970 | } | |
2971 | ||
072b91f9 BK |
2972 | /** |
2973 | * ibmvfc_show_log_level - Show the adapter's error logging level | |
2974 | * @dev: class device struct | |
2975 | * @buf: buffer | |
2976 | * | |
2977 | * Return value: | |
2978 | * number of bytes printed to buffer | |
2979 | **/ | |
2980 | static ssize_t ibmvfc_show_log_level(struct device *dev, | |
2981 | struct device_attribute *attr, char *buf) | |
2982 | { | |
2983 | struct Scsi_Host *shost = class_to_shost(dev); | |
2984 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2985 | unsigned long flags = 0; | |
2986 | int len; | |
2987 | ||
2988 | spin_lock_irqsave(shost->host_lock, flags); | |
2989 | len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); | |
2990 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2991 | return len; | |
2992 | } | |
2993 | ||
2994 | /** | |
2995 | * ibmvfc_store_log_level - Change the adapter's error logging level | |
2996 | * @dev: class device struct | |
2997 | * @buf: buffer | |
2998 | * | |
2999 | * Return value: | |
3000 | * number of bytes printed to buffer | |
3001 | **/ | |
3002 | static ssize_t ibmvfc_store_log_level(struct device *dev, | |
3003 | struct device_attribute *attr, | |
3004 | const char *buf, size_t count) | |
3005 | { | |
3006 | struct Scsi_Host *shost = class_to_shost(dev); | |
3007 | struct ibmvfc_host *vhost = shost_priv(shost); | |
3008 | unsigned long flags = 0; | |
3009 | ||
3010 | spin_lock_irqsave(shost->host_lock, flags); | |
3011 | vhost->log_level = simple_strtoul(buf, NULL, 10); | |
3012 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3013 | return strlen(buf); | |
3014 | } | |
3015 | ||
85e2399e BK |
3016 | static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); |
3017 | static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); | |
3018 | static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); | |
3019 | static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); | |
3020 | static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); | |
497f9c50 | 3021 | static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); |
85e2399e BK |
3022 | static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, |
3023 | ibmvfc_show_log_level, ibmvfc_store_log_level); | |
072b91f9 BK |
3024 | |
3025 | #ifdef CONFIG_SCSI_IBMVFC_TRACE | |
3026 | /** | |
3027 | * ibmvfc_read_trace - Dump the adapter trace | |
2c3c8bea | 3028 | * @filp: open sysfs file |
072b91f9 BK |
3029 | * @kobj: kobject struct |
3030 | * @bin_attr: bin_attribute struct | |
3031 | * @buf: buffer | |
3032 | * @off: offset | |
3033 | * @count: buffer size | |
3034 | * | |
3035 | * Return value: | |
3036 | * number of bytes printed to buffer | |
3037 | **/ | |
2c3c8bea | 3038 | static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, |
072b91f9 BK |
3039 | struct bin_attribute *bin_attr, |
3040 | char *buf, loff_t off, size_t count) | |
3041 | { | |
3042 | struct device *dev = container_of(kobj, struct device, kobj); | |
3043 | struct Scsi_Host *shost = class_to_shost(dev); | |
3044 | struct ibmvfc_host *vhost = shost_priv(shost); | |
3045 | unsigned long flags = 0; | |
3046 | int size = IBMVFC_TRACE_SIZE; | |
3047 | char *src = (char *)vhost->trace; | |
3048 | ||
3049 | if (off > size) | |
3050 | return 0; | |
3051 | if (off + count > size) { | |
3052 | size -= off; | |
3053 | count = size; | |
3054 | } | |
3055 | ||
3056 | spin_lock_irqsave(shost->host_lock, flags); | |
3057 | memcpy(buf, &src[off], count); | |
3058 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3059 | return count; | |
3060 | } | |
3061 | ||
3062 | static struct bin_attribute ibmvfc_trace_attr = { | |
3063 | .attr = { | |
3064 | .name = "trace", | |
3065 | .mode = S_IRUGO, | |
3066 | }, | |
3067 | .size = 0, | |
3068 | .read = ibmvfc_read_trace, | |
3069 | }; | |
3070 | #endif | |
3071 | ||
3072 | static struct device_attribute *ibmvfc_attrs[] = { | |
85e2399e BK |
3073 | &dev_attr_partition_name, |
3074 | &dev_attr_device_name, | |
3075 | &dev_attr_port_loc_code, | |
3076 | &dev_attr_drc_name, | |
3077 | &dev_attr_npiv_version, | |
497f9c50 | 3078 | &dev_attr_capabilities, |
85e2399e | 3079 | &dev_attr_log_level, |
072b91f9 BK |
3080 | NULL |
3081 | }; | |
3082 | ||
3083 | static struct scsi_host_template driver_template = { | |
3084 | .module = THIS_MODULE, | |
3085 | .name = "IBM POWER Virtual FC Adapter", | |
3086 | .proc_name = IBMVFC_NAME, | |
3087 | .queuecommand = ibmvfc_queuecommand, | |
b6a05c82 | 3088 | .eh_timed_out = fc_eh_timed_out, |
072b91f9 BK |
3089 | .eh_abort_handler = ibmvfc_eh_abort_handler, |
3090 | .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, | |
3091 | .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, | |
3092 | .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, | |
3093 | .slave_alloc = ibmvfc_slave_alloc, | |
3094 | .slave_configure = ibmvfc_slave_configure, | |
ad8dcffa | 3095 | .target_alloc = ibmvfc_target_alloc, |
072b91f9 BK |
3096 | .scan_finished = ibmvfc_scan_finished, |
3097 | .change_queue_depth = ibmvfc_change_queue_depth, | |
072b91f9 BK |
3098 | .cmd_per_lun = 16, |
3099 | .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, | |
3100 | .this_id = -1, | |
3101 | .sg_tablesize = SG_ALL, | |
3102 | .max_sectors = IBMVFC_MAX_SECTORS, | |
072b91f9 | 3103 | .shost_attrs = ibmvfc_attrs, |
c40ecc12 | 3104 | .track_queue_depth = 1, |
072b91f9 BK |
3105 | }; |
3106 | ||
3107 | /** | |
3108 | * ibmvfc_next_async_crq - Returns the next entry in async queue | |
3109 | * @vhost: ibmvfc host struct | |
3110 | * | |
3111 | * Returns: | |
3112 | * Pointer to next entry in queue / NULL if empty | |
3113 | **/ | |
3114 | static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) | |
3115 | { | |
3116 | struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; | |
3117 | struct ibmvfc_async_crq *crq; | |
3118 | ||
3119 | crq = &async_crq->msgs[async_crq->cur]; | |
3120 | if (crq->valid & 0x80) { | |
3121 | if (++async_crq->cur == async_crq->size) | |
3122 | async_crq->cur = 0; | |
f5832fa2 | 3123 | rmb(); |
072b91f9 BK |
3124 | } else |
3125 | crq = NULL; | |
3126 | ||
3127 | return crq; | |
3128 | } | |
3129 | ||
3130 | /** | |
3131 | * ibmvfc_next_crq - Returns the next entry in message queue | |
3132 | * @vhost: ibmvfc host struct | |
3133 | * | |
3134 | * Returns: | |
3135 | * Pointer to next entry in queue / NULL if empty | |
3136 | **/ | |
3137 | static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) | |
3138 | { | |
3139 | struct ibmvfc_crq_queue *queue = &vhost->crq; | |
3140 | struct ibmvfc_crq *crq; | |
3141 | ||
3142 | crq = &queue->msgs[queue->cur]; | |
3143 | if (crq->valid & 0x80) { | |
3144 | if (++queue->cur == queue->size) | |
3145 | queue->cur = 0; | |
f5832fa2 | 3146 | rmb(); |
072b91f9 BK |
3147 | } else |
3148 | crq = NULL; | |
3149 | ||
3150 | return crq; | |
3151 | } | |
3152 | ||
3153 | /** | |
3154 | * ibmvfc_interrupt - Interrupt handler | |
3155 | * @irq: number of irq to handle, not used | |
3156 | * @dev_instance: ibmvfc_host that received interrupt | |
3157 | * | |
3158 | * Returns: | |
3159 | * IRQ_HANDLED | |
3160 | **/ | |
3161 | static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) | |
3162 | { | |
3163 | struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; | |
039a0898 BK |
3164 | unsigned long flags; |
3165 | ||
3166 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3167 | vio_disable_interrupts(to_vio_dev(vhost->dev)); | |
3168 | tasklet_schedule(&vhost->tasklet); | |
3169 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3170 | return IRQ_HANDLED; | |
3171 | } | |
3172 | ||
3173 | /** | |
3174 | * ibmvfc_tasklet - Interrupt handler tasklet | |
3175 | * @data: ibmvfc host struct | |
3176 | * | |
3177 | * Returns: | |
3178 | * Nothing | |
3179 | **/ | |
3180 | static void ibmvfc_tasklet(void *data) | |
3181 | { | |
3182 | struct ibmvfc_host *vhost = data; | |
072b91f9 BK |
3183 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
3184 | struct ibmvfc_crq *crq; | |
3185 | struct ibmvfc_async_crq *async; | |
3186 | unsigned long flags; | |
3187 | int done = 0; | |
3188 | ||
3189 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
072b91f9 | 3190 | while (!done) { |
072b91f9 BK |
3191 | /* Pull all the valid messages off the async CRQ */ |
3192 | while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { | |
3193 | ibmvfc_handle_async(async, vhost); | |
3194 | async->valid = 0; | |
f5832fa2 | 3195 | wmb(); |
072b91f9 BK |
3196 | } |
3197 | ||
f1d7fb7a BK |
3198 | /* Pull all the valid messages off the CRQ */ |
3199 | while ((crq = ibmvfc_next_crq(vhost)) != NULL) { | |
072b91f9 BK |
3200 | ibmvfc_handle_crq(crq, vhost); |
3201 | crq->valid = 0; | |
f5832fa2 | 3202 | wmb(); |
f1d7fb7a BK |
3203 | } |
3204 | ||
3205 | vio_enable_interrupts(vdev); | |
3206 | if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { | |
072b91f9 BK |
3207 | vio_disable_interrupts(vdev); |
3208 | ibmvfc_handle_async(async, vhost); | |
4081b77c | 3209 | async->valid = 0; |
f5832fa2 | 3210 | wmb(); |
f1d7fb7a BK |
3211 | } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { |
3212 | vio_disable_interrupts(vdev); | |
3213 | ibmvfc_handle_crq(crq, vhost); | |
3214 | crq->valid = 0; | |
f5832fa2 | 3215 | wmb(); |
072b91f9 BK |
3216 | } else |
3217 | done = 1; | |
3218 | } | |
3219 | ||
3220 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
072b91f9 BK |
3221 | } |
3222 | ||
3223 | /** | |
3224 | * ibmvfc_init_tgt - Set the next init job step for the target | |
3225 | * @tgt: ibmvfc target struct | |
3226 | * @job_step: job step to perform | |
3227 | * | |
3228 | **/ | |
3229 | static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, | |
3230 | void (*job_step) (struct ibmvfc_target *)) | |
3231 | { | |
3232 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); | |
3233 | tgt->job_step = job_step; | |
3234 | wake_up(&tgt->vhost->work_wait_q); | |
3235 | } | |
3236 | ||
3237 | /** | |
3238 | * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization | |
3239 | * @tgt: ibmvfc target struct | |
3240 | * @job_step: initialization job step | |
3241 | * | |
7d0e4622 BK |
3242 | * Returns: 1 if step will be retried / 0 if not |
3243 | * | |
072b91f9 | 3244 | **/ |
7d0e4622 | 3245 | static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, |
072b91f9 BK |
3246 | void (*job_step) (struct ibmvfc_target *)) |
3247 | { | |
1c41fa82 | 3248 | if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { |
072b91f9 BK |
3249 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
3250 | wake_up(&tgt->vhost->work_wait_q); | |
7d0e4622 | 3251 | return 0; |
072b91f9 BK |
3252 | } else |
3253 | ibmvfc_init_tgt(tgt, job_step); | |
7d0e4622 | 3254 | return 1; |
072b91f9 BK |
3255 | } |
3256 | ||
a3b7aeab BK |
3257 | /* Defined in FC-LS */ |
3258 | static const struct { | |
3259 | int code; | |
3260 | int retry; | |
3261 | int logged_in; | |
3262 | } prli_rsp [] = { | |
3263 | { 0, 1, 0 }, | |
3264 | { 1, 0, 1 }, | |
3265 | { 2, 1, 0 }, | |
3266 | { 3, 1, 0 }, | |
3267 | { 4, 0, 0 }, | |
3268 | { 5, 0, 0 }, | |
3269 | { 6, 0, 1 }, | |
3270 | { 7, 0, 0 }, | |
3271 | { 8, 1, 0 }, | |
3272 | }; | |
3273 | ||
3274 | /** | |
3275 | * ibmvfc_get_prli_rsp - Find PRLI response index | |
3276 | * @flags: PRLI response flags | |
3277 | * | |
3278 | **/ | |
3279 | static int ibmvfc_get_prli_rsp(u16 flags) | |
3280 | { | |
3281 | int i; | |
3282 | int code = (flags & 0x0f00) >> 8; | |
3283 | ||
3284 | for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) | |
3285 | if (prli_rsp[i].code == code) | |
3286 | return i; | |
3287 | ||
3288 | return 0; | |
3289 | } | |
3290 | ||
072b91f9 BK |
3291 | /** |
3292 | * ibmvfc_tgt_prli_done - Completion handler for Process Login | |
3293 | * @evt: ibmvfc event struct | |
3294 | * | |
3295 | **/ | |
3296 | static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) | |
3297 | { | |
3298 | struct ibmvfc_target *tgt = evt->tgt; | |
3299 | struct ibmvfc_host *vhost = evt->vhost; | |
3300 | struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; | |
a3b7aeab | 3301 | struct ibmvfc_prli_svc_parms *parms = &rsp->parms; |
0aab6c3f | 3302 | u32 status = be16_to_cpu(rsp->common.status); |
7d0e4622 | 3303 | int index, level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
3304 | |
3305 | vhost->discovery_threads--; | |
3306 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3307 | switch (status) { | |
3308 | case IBMVFC_MAD_SUCCESS: | |
a3b7aeab BK |
3309 | tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", |
3310 | parms->type, parms->flags, parms->service_parms); | |
3311 | ||
3312 | if (parms->type == IBMVFC_SCSI_FCP_TYPE) { | |
0aab6c3f | 3313 | index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); |
a3b7aeab | 3314 | if (prli_rsp[index].logged_in) { |
0aab6c3f | 3315 | if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { |
a3b7aeab BK |
3316 | tgt->need_login = 0; |
3317 | tgt->ids.roles = 0; | |
0aab6c3f | 3318 | if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) |
a3b7aeab | 3319 | tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; |
0aab6c3f | 3320 | if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) |
a3b7aeab | 3321 | tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; |
43c8da90 | 3322 | tgt->add_rport = 1; |
a3b7aeab BK |
3323 | } else |
3324 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
3325 | } else if (prli_rsp[index].retry) | |
3326 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); | |
3327 | else | |
3328 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
3329 | } else | |
3330 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
072b91f9 BK |
3331 | break; |
3332 | case IBMVFC_MAD_DRIVER_FAILED: | |
3333 | break; | |
3334 | case IBMVFC_MAD_CRQ_ERROR: | |
3335 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); | |
3336 | break; | |
3337 | case IBMVFC_MAD_FAILED: | |
3338 | default: | |
0aab6c3f TD |
3339 | if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && |
3340 | be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) | |
017b2ae3 BK |
3341 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
3342 | else if (tgt->logo_rcvd) | |
3343 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); | |
0aab6c3f | 3344 | else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) |
7d0e4622 | 3345 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); |
10e79499 BK |
3346 | else |
3347 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
7d0e4622 BK |
3348 | |
3349 | tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", | |
0aab6c3f | 3350 | ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), |
7d0e4622 | 3351 | rsp->status, rsp->error, status); |
072b91f9 | 3352 | break; |
f36cfe6a | 3353 | } |
072b91f9 BK |
3354 | |
3355 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3356 | ibmvfc_free_event(evt); | |
3357 | wake_up(&vhost->work_wait_q); | |
3358 | } | |
3359 | ||
3360 | /** | |
3361 | * ibmvfc_tgt_send_prli - Send a process login | |
3362 | * @tgt: ibmvfc target struct | |
3363 | * | |
3364 | **/ | |
3365 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) | |
3366 | { | |
3367 | struct ibmvfc_process_login *prli; | |
3368 | struct ibmvfc_host *vhost = tgt->vhost; | |
3369 | struct ibmvfc_event *evt; | |
3370 | ||
3371 | if (vhost->discovery_threads >= disc_threads) | |
3372 | return; | |
3373 | ||
3374 | kref_get(&tgt->kref); | |
3375 | evt = ibmvfc_get_event(vhost); | |
3376 | vhost->discovery_threads++; | |
3377 | ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); | |
3378 | evt->tgt = tgt; | |
3379 | prli = &evt->iu.prli; | |
3380 | memset(prli, 0, sizeof(*prli)); | |
0aab6c3f TD |
3381 | prli->common.version = cpu_to_be32(1); |
3382 | prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); | |
3383 | prli->common.length = cpu_to_be16(sizeof(*prli)); | |
3384 | prli->scsi_id = cpu_to_be64(tgt->scsi_id); | |
072b91f9 BK |
3385 | |
3386 | prli->parms.type = IBMVFC_SCSI_FCP_TYPE; | |
0aab6c3f TD |
3387 | prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); |
3388 | prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); | |
bb5a5054 | 3389 | prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED); |
072b91f9 | 3390 | |
a6104b1e TD |
3391 | if (cls3_error) |
3392 | prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY); | |
3393 | ||
072b91f9 BK |
3394 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
3395 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3396 | vhost->discovery_threads--; | |
3397 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3398 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3399 | } else | |
3400 | tgt_dbg(tgt, "Sent process login\n"); | |
3401 | } | |
3402 | ||
3403 | /** | |
3404 | * ibmvfc_tgt_plogi_done - Completion handler for Port Login | |
3405 | * @evt: ibmvfc event struct | |
3406 | * | |
3407 | **/ | |
3408 | static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) | |
3409 | { | |
3410 | struct ibmvfc_target *tgt = evt->tgt; | |
3411 | struct ibmvfc_host *vhost = evt->vhost; | |
3412 | struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; | |
0aab6c3f | 3413 | u32 status = be16_to_cpu(rsp->common.status); |
7d0e4622 | 3414 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
3415 | |
3416 | vhost->discovery_threads--; | |
3417 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3418 | switch (status) { | |
3419 | case IBMVFC_MAD_SUCCESS: | |
3420 | tgt_dbg(tgt, "Port Login succeeded\n"); | |
3421 | if (tgt->ids.port_name && | |
3422 | tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { | |
3423 | vhost->reinit = 1; | |
3424 | tgt_dbg(tgt, "Port re-init required\n"); | |
3425 | break; | |
3426 | } | |
3427 | tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); | |
3428 | tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); | |
3429 | tgt->ids.port_id = tgt->scsi_id; | |
072b91f9 BK |
3430 | memcpy(&tgt->service_parms, &rsp->service_parms, |
3431 | sizeof(tgt->service_parms)); | |
3432 | memcpy(&tgt->service_parms_change, &rsp->service_parms_change, | |
3433 | sizeof(tgt->service_parms_change)); | |
3434 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); | |
3435 | break; | |
3436 | case IBMVFC_MAD_DRIVER_FAILED: | |
3437 | break; | |
3438 | case IBMVFC_MAD_CRQ_ERROR: | |
3439 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); | |
3440 | break; | |
3441 | case IBMVFC_MAD_FAILED: | |
3442 | default: | |
0aab6c3f | 3443 | if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) |
7d0e4622 | 3444 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
10e79499 BK |
3445 | else |
3446 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
7d0e4622 BK |
3447 | |
3448 | tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", | |
0aab6c3f TD |
3449 | ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), rsp->status, rsp->error, |
3450 | ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), rsp->fc_type, | |
3451 | ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), rsp->fc_explain, status); | |
072b91f9 | 3452 | break; |
f36cfe6a | 3453 | } |
072b91f9 BK |
3454 | |
3455 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3456 | ibmvfc_free_event(evt); | |
3457 | wake_up(&vhost->work_wait_q); | |
3458 | } | |
3459 | ||
3460 | /** | |
3461 | * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target | |
3462 | * @tgt: ibmvfc target struct | |
3463 | * | |
3464 | **/ | |
3465 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) | |
3466 | { | |
3467 | struct ibmvfc_port_login *plogi; | |
3468 | struct ibmvfc_host *vhost = tgt->vhost; | |
3469 | struct ibmvfc_event *evt; | |
3470 | ||
3471 | if (vhost->discovery_threads >= disc_threads) | |
3472 | return; | |
3473 | ||
3474 | kref_get(&tgt->kref); | |
017b2ae3 | 3475 | tgt->logo_rcvd = 0; |
072b91f9 BK |
3476 | evt = ibmvfc_get_event(vhost); |
3477 | vhost->discovery_threads++; | |
3478 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
3479 | ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); | |
3480 | evt->tgt = tgt; | |
3481 | plogi = &evt->iu.plogi; | |
3482 | memset(plogi, 0, sizeof(*plogi)); | |
0aab6c3f TD |
3483 | plogi->common.version = cpu_to_be32(1); |
3484 | plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); | |
3485 | plogi->common.length = cpu_to_be16(sizeof(*plogi)); | |
3486 | plogi->scsi_id = cpu_to_be64(tgt->scsi_id); | |
072b91f9 BK |
3487 | |
3488 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3489 | vhost->discovery_threads--; | |
3490 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3491 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3492 | } else | |
3493 | tgt_dbg(tgt, "Sent port login\n"); | |
3494 | } | |
3495 | ||
3496 | /** | |
3497 | * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD | |
3498 | * @evt: ibmvfc event struct | |
3499 | * | |
3500 | **/ | |
3501 | static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) | |
3502 | { | |
3503 | struct ibmvfc_target *tgt = evt->tgt; | |
3504 | struct ibmvfc_host *vhost = evt->vhost; | |
3505 | struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; | |
0aab6c3f | 3506 | u32 status = be16_to_cpu(rsp->common.status); |
072b91f9 BK |
3507 | |
3508 | vhost->discovery_threads--; | |
3509 | ibmvfc_free_event(evt); | |
3510 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3511 | ||
3512 | switch (status) { | |
3513 | case IBMVFC_MAD_SUCCESS: | |
3514 | tgt_dbg(tgt, "Implicit Logout succeeded\n"); | |
3515 | break; | |
3516 | case IBMVFC_MAD_DRIVER_FAILED: | |
3517 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3518 | wake_up(&vhost->work_wait_q); | |
3519 | return; | |
3520 | case IBMVFC_MAD_FAILED: | |
3521 | default: | |
3522 | tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); | |
3523 | break; | |
f36cfe6a | 3524 | } |
072b91f9 BK |
3525 | |
3526 | if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) | |
3527 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); | |
3528 | else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && | |
3529 | tgt->scsi_id != tgt->new_scsi_id) | |
3530 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
3531 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3532 | wake_up(&vhost->work_wait_q); | |
3533 | } | |
3534 | ||
3535 | /** | |
3536 | * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target | |
3537 | * @tgt: ibmvfc target struct | |
3538 | * | |
3539 | **/ | |
3540 | static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) | |
3541 | { | |
3542 | struct ibmvfc_implicit_logout *mad; | |
3543 | struct ibmvfc_host *vhost = tgt->vhost; | |
3544 | struct ibmvfc_event *evt; | |
3545 | ||
3546 | if (vhost->discovery_threads >= disc_threads) | |
3547 | return; | |
3548 | ||
3549 | kref_get(&tgt->kref); | |
3550 | evt = ibmvfc_get_event(vhost); | |
3551 | vhost->discovery_threads++; | |
3552 | ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); | |
3553 | evt->tgt = tgt; | |
3554 | mad = &evt->iu.implicit_logout; | |
3555 | memset(mad, 0, sizeof(*mad)); | |
0aab6c3f TD |
3556 | mad->common.version = cpu_to_be32(1); |
3557 | mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); | |
3558 | mad->common.length = cpu_to_be16(sizeof(*mad)); | |
3559 | mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); | |
072b91f9 BK |
3560 | |
3561 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
3562 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3563 | vhost->discovery_threads--; | |
3564 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3565 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3566 | } else | |
3567 | tgt_dbg(tgt, "Sent Implicit Logout\n"); | |
3568 | } | |
3569 | ||
989b8545 BK |
3570 | /** |
3571 | * ibmvfc_adisc_needs_plogi - Does device need PLOGI? | |
3572 | * @mad: ibmvfc passthru mad struct | |
3573 | * @tgt: ibmvfc target struct | |
3574 | * | |
3575 | * Returns: | |
3576 | * 1 if PLOGI needed / 0 if PLOGI not needed | |
3577 | **/ | |
3578 | static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, | |
3579 | struct ibmvfc_target *tgt) | |
3580 | { | |
09dd15e0 | 3581 | if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name) |
989b8545 | 3582 | return 1; |
09dd15e0 | 3583 | if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name) |
989b8545 | 3584 | return 1; |
0aab6c3f | 3585 | if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) |
989b8545 BK |
3586 | return 1; |
3587 | return 0; | |
3588 | } | |
3589 | ||
3590 | /** | |
3591 | * ibmvfc_tgt_adisc_done - Completion handler for ADISC | |
3592 | * @evt: ibmvfc event struct | |
3593 | * | |
3594 | **/ | |
3595 | static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) | |
3596 | { | |
3597 | struct ibmvfc_target *tgt = evt->tgt; | |
3598 | struct ibmvfc_host *vhost = evt->vhost; | |
3599 | struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; | |
0aab6c3f | 3600 | u32 status = be16_to_cpu(mad->common.status); |
989b8545 BK |
3601 | u8 fc_reason, fc_explain; |
3602 | ||
3603 | vhost->discovery_threads--; | |
3604 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
10501e1c | 3605 | del_timer(&tgt->timer); |
989b8545 BK |
3606 | |
3607 | switch (status) { | |
3608 | case IBMVFC_MAD_SUCCESS: | |
3609 | tgt_dbg(tgt, "ADISC succeeded\n"); | |
3610 | if (ibmvfc_adisc_needs_plogi(mad, tgt)) | |
5e47167b | 3611 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
989b8545 BK |
3612 | break; |
3613 | case IBMVFC_MAD_DRIVER_FAILED: | |
3614 | break; | |
3615 | case IBMVFC_MAD_FAILED: | |
3616 | default: | |
5e47167b | 3617 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
0aab6c3f TD |
3618 | fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; |
3619 | fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; | |
989b8545 | 3620 | tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
0aab6c3f | 3621 | ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), |
989b8545 BK |
3622 | mad->iu.status, mad->iu.error, |
3623 | ibmvfc_get_fc_type(fc_reason), fc_reason, | |
3624 | ibmvfc_get_ls_explain(fc_explain), fc_explain, status); | |
3625 | break; | |
f36cfe6a | 3626 | } |
989b8545 BK |
3627 | |
3628 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3629 | ibmvfc_free_event(evt); | |
3630 | wake_up(&vhost->work_wait_q); | |
3631 | } | |
3632 | ||
3633 | /** | |
3634 | * ibmvfc_init_passthru - Initialize an event struct for FC passthru | |
3635 | * @evt: ibmvfc event struct | |
3636 | * | |
3637 | **/ | |
3638 | static void ibmvfc_init_passthru(struct ibmvfc_event *evt) | |
3639 | { | |
3640 | struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; | |
3641 | ||
3642 | memset(mad, 0, sizeof(*mad)); | |
0aab6c3f TD |
3643 | mad->common.version = cpu_to_be32(1); |
3644 | mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); | |
3645 | mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); | |
3646 | mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + | |
3647 | offsetof(struct ibmvfc_passthru_mad, iu)); | |
3648 | mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); | |
3649 | mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); | |
3650 | mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); | |
3651 | mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + | |
989b8545 | 3652 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + |
0aab6c3f TD |
3653 | offsetof(struct ibmvfc_passthru_fc_iu, payload)); |
3654 | mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); | |
3655 | mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + | |
989b8545 | 3656 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + |
0aab6c3f TD |
3657 | offsetof(struct ibmvfc_passthru_fc_iu, response)); |
3658 | mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); | |
989b8545 BK |
3659 | } |
3660 | ||
10501e1c BK |
3661 | /** |
3662 | * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC | |
3663 | * @evt: ibmvfc event struct | |
3664 | * | |
3665 | * Just cleanup this event struct. Everything else is handled by | |
3666 | * the ADISC completion handler. If the ADISC never actually comes | |
3667 | * back, we still have the timer running on the ADISC event struct | |
3668 | * which will fire and cause the CRQ to get reset. | |
3669 | * | |
3670 | **/ | |
3671 | static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) | |
3672 | { | |
3673 | struct ibmvfc_host *vhost = evt->vhost; | |
3674 | struct ibmvfc_target *tgt = evt->tgt; | |
3675 | ||
3676 | tgt_dbg(tgt, "ADISC cancel complete\n"); | |
3677 | vhost->abort_threads--; | |
3678 | ibmvfc_free_event(evt); | |
3679 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3680 | wake_up(&vhost->work_wait_q); | |
3681 | } | |
3682 | ||
3683 | /** | |
3684 | * ibmvfc_adisc_timeout - Handle an ADISC timeout | |
3685 | * @tgt: ibmvfc target struct | |
3686 | * | |
3687 | * If an ADISC times out, send a cancel. If the cancel times | |
3688 | * out, reset the CRQ. When the ADISC comes back as cancelled, | |
3689 | * log back into the target. | |
3690 | **/ | |
9a5d04fc | 3691 | static void ibmvfc_adisc_timeout(struct timer_list *t) |
10501e1c | 3692 | { |
9a5d04fc | 3693 | struct ibmvfc_target *tgt = from_timer(tgt, t, timer); |
10501e1c BK |
3694 | struct ibmvfc_host *vhost = tgt->vhost; |
3695 | struct ibmvfc_event *evt; | |
3696 | struct ibmvfc_tmf *tmf; | |
3697 | unsigned long flags; | |
3698 | int rc; | |
3699 | ||
3700 | tgt_dbg(tgt, "ADISC timeout\n"); | |
3701 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3702 | if (vhost->abort_threads >= disc_threads || | |
3703 | tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || | |
3704 | vhost->state != IBMVFC_INITIALIZING || | |
3705 | vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { | |
3706 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3707 | return; | |
3708 | } | |
3709 | ||
3710 | vhost->abort_threads++; | |
3711 | kref_get(&tgt->kref); | |
3712 | evt = ibmvfc_get_event(vhost); | |
3713 | ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); | |
3714 | ||
3715 | evt->tgt = tgt; | |
3716 | tmf = &evt->iu.tmf; | |
3717 | memset(tmf, 0, sizeof(*tmf)); | |
0aab6c3f TD |
3718 | tmf->common.version = cpu_to_be32(1); |
3719 | tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); | |
3720 | tmf->common.length = cpu_to_be16(sizeof(*tmf)); | |
3721 | tmf->scsi_id = cpu_to_be64(tgt->scsi_id); | |
3722 | tmf->cancel_key = cpu_to_be32(tgt->cancel_key); | |
10501e1c BK |
3723 | |
3724 | rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
3725 | ||
3726 | if (rc) { | |
3727 | tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); | |
3728 | vhost->abort_threads--; | |
3729 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3730 | __ibmvfc_reset_host(vhost); | |
3731 | } else | |
3732 | tgt_dbg(tgt, "Attempting to cancel ADISC\n"); | |
3733 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3734 | } | |
3735 | ||
989b8545 BK |
3736 | /** |
3737 | * ibmvfc_tgt_adisc - Initiate an ADISC for specified target | |
3738 | * @tgt: ibmvfc target struct | |
3739 | * | |
10501e1c BK |
3740 | * When sending an ADISC we end up with two timers running. The |
3741 | * first timer is the timer in the ibmvfc target struct. If this | |
3742 | * fires, we send a cancel to the target. The second timer is the | |
3743 | * timer on the ibmvfc event for the ADISC, which is longer. If that | |
3744 | * fires, it means the ADISC timed out and our attempt to cancel it | |
3745 | * also failed, so we need to reset the CRQ. | |
989b8545 BK |
3746 | **/ |
3747 | static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) | |
3748 | { | |
3749 | struct ibmvfc_passthru_mad *mad; | |
3750 | struct ibmvfc_host *vhost = tgt->vhost; | |
3751 | struct ibmvfc_event *evt; | |
3752 | ||
3753 | if (vhost->discovery_threads >= disc_threads) | |
3754 | return; | |
3755 | ||
3756 | kref_get(&tgt->kref); | |
3757 | evt = ibmvfc_get_event(vhost); | |
3758 | vhost->discovery_threads++; | |
3759 | ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); | |
3760 | evt->tgt = tgt; | |
3761 | ||
3762 | ibmvfc_init_passthru(evt); | |
3763 | mad = &evt->iu.passthru; | |
0aab6c3f TD |
3764 | mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); |
3765 | mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); | |
3766 | mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); | |
989b8545 | 3767 | |
0aab6c3f | 3768 | mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); |
989b8545 BK |
3769 | memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, |
3770 | sizeof(vhost->login_buf->resp.port_name)); | |
3771 | memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, | |
3772 | sizeof(vhost->login_buf->resp.node_name)); | |
0aab6c3f | 3773 | mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); |
989b8545 | 3774 | |
10501e1c BK |
3775 | if (timer_pending(&tgt->timer)) |
3776 | mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); | |
3777 | else { | |
10501e1c | 3778 | tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); |
10501e1c BK |
3779 | add_timer(&tgt->timer); |
3780 | } | |
3781 | ||
989b8545 | 3782 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
10501e1c | 3783 | if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { |
989b8545 | 3784 | vhost->discovery_threads--; |
10501e1c | 3785 | del_timer(&tgt->timer); |
989b8545 BK |
3786 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
3787 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3788 | } else | |
3789 | tgt_dbg(tgt, "Sent ADISC\n"); | |
3790 | } | |
3791 | ||
072b91f9 BK |
3792 | /** |
3793 | * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD | |
3794 | * @evt: ibmvfc event struct | |
3795 | * | |
3796 | **/ | |
3797 | static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) | |
3798 | { | |
3799 | struct ibmvfc_target *tgt = evt->tgt; | |
3800 | struct ibmvfc_host *vhost = evt->vhost; | |
3801 | struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; | |
0aab6c3f | 3802 | u32 status = be16_to_cpu(rsp->common.status); |
7d0e4622 | 3803 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
3804 | |
3805 | vhost->discovery_threads--; | |
3806 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3807 | switch (status) { | |
3808 | case IBMVFC_MAD_SUCCESS: | |
3809 | tgt_dbg(tgt, "Query Target succeeded\n"); | |
0aab6c3f TD |
3810 | tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id); |
3811 | if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) | |
072b91f9 | 3812 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); |
989b8545 BK |
3813 | else |
3814 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); | |
072b91f9 BK |
3815 | break; |
3816 | case IBMVFC_MAD_DRIVER_FAILED: | |
3817 | break; | |
3818 | case IBMVFC_MAD_CRQ_ERROR: | |
3819 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); | |
3820 | break; | |
3821 | case IBMVFC_MAD_FAILED: | |
3822 | default: | |
0aab6c3f TD |
3823 | if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && |
3824 | be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && | |
3825 | be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) | |
072b91f9 | 3826 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
0aab6c3f | 3827 | else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) |
7d0e4622 | 3828 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); |
10e79499 BK |
3829 | else |
3830 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
7d0e4622 BK |
3831 | |
3832 | tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", | |
0aab6c3f TD |
3833 | ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), |
3834 | rsp->status, rsp->error, ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), | |
3835 | rsp->fc_type, ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), | |
3836 | rsp->fc_explain, status); | |
072b91f9 | 3837 | break; |
f36cfe6a | 3838 | } |
072b91f9 BK |
3839 | |
3840 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3841 | ibmvfc_free_event(evt); | |
3842 | wake_up(&vhost->work_wait_q); | |
3843 | } | |
3844 | ||
3845 | /** | |
3846 | * ibmvfc_tgt_query_target - Initiate a Query Target for specified target | |
3847 | * @tgt: ibmvfc target struct | |
3848 | * | |
3849 | **/ | |
3850 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) | |
3851 | { | |
3852 | struct ibmvfc_query_tgt *query_tgt; | |
3853 | struct ibmvfc_host *vhost = tgt->vhost; | |
3854 | struct ibmvfc_event *evt; | |
3855 | ||
3856 | if (vhost->discovery_threads >= disc_threads) | |
3857 | return; | |
3858 | ||
3859 | kref_get(&tgt->kref); | |
3860 | evt = ibmvfc_get_event(vhost); | |
3861 | vhost->discovery_threads++; | |
3862 | evt->tgt = tgt; | |
3863 | ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); | |
3864 | query_tgt = &evt->iu.query_tgt; | |
3865 | memset(query_tgt, 0, sizeof(*query_tgt)); | |
0aab6c3f TD |
3866 | query_tgt->common.version = cpu_to_be32(1); |
3867 | query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); | |
3868 | query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); | |
3869 | query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); | |
072b91f9 BK |
3870 | |
3871 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
3872 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3873 | vhost->discovery_threads--; | |
3874 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3875 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3876 | } else | |
3877 | tgt_dbg(tgt, "Sent Query Target\n"); | |
3878 | } | |
3879 | ||
3880 | /** | |
3881 | * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target | |
3882 | * @vhost: ibmvfc host struct | |
3883 | * @scsi_id: SCSI ID to allocate target for | |
3884 | * | |
3885 | * Returns: | |
3886 | * 0 on success / other on failure | |
3887 | **/ | |
3888 | static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) | |
3889 | { | |
3890 | struct ibmvfc_target *tgt; | |
3891 | unsigned long flags; | |
3892 | ||
3893 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3894 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
3895 | if (tgt->scsi_id == scsi_id) { | |
3896 | if (tgt->need_login) | |
3897 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); | |
3898 | goto unlock_out; | |
3899 | } | |
3900 | } | |
3901 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3902 | ||
7270b9bd | 3903 | tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); |
0883e3b3 | 3904 | memset(tgt, 0, sizeof(*tgt)); |
072b91f9 BK |
3905 | tgt->scsi_id = scsi_id; |
3906 | tgt->new_scsi_id = scsi_id; | |
3907 | tgt->vhost = vhost; | |
3908 | tgt->need_login = 1; | |
10501e1c | 3909 | tgt->cancel_key = vhost->task_set++; |
9a5d04fc | 3910 | timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0); |
072b91f9 BK |
3911 | kref_init(&tgt->kref); |
3912 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); | |
3913 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3914 | list_add_tail(&tgt->queue, &vhost->targets); | |
3915 | ||
3916 | unlock_out: | |
3917 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3918 | return 0; | |
3919 | } | |
3920 | ||
3921 | /** | |
3922 | * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets | |
3923 | * @vhost: ibmvfc host struct | |
3924 | * | |
3925 | * Returns: | |
3926 | * 0 on success / other on failure | |
3927 | **/ | |
3928 | static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) | |
3929 | { | |
3930 | int i, rc; | |
3931 | ||
3932 | for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) | |
3933 | rc = ibmvfc_alloc_target(vhost, | |
0aab6c3f TD |
3934 | be32_to_cpu(vhost->disc_buf->scsi_id[i]) & |
3935 | IBMVFC_DISC_TGT_SCSI_ID_MASK); | |
072b91f9 BK |
3936 | |
3937 | return rc; | |
3938 | } | |
3939 | ||
3940 | /** | |
3941 | * ibmvfc_discover_targets_done - Completion handler for discover targets MAD | |
3942 | * @evt: ibmvfc event struct | |
3943 | * | |
3944 | **/ | |
3945 | static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) | |
3946 | { | |
3947 | struct ibmvfc_host *vhost = evt->vhost; | |
3948 | struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; | |
0aab6c3f | 3949 | u32 mad_status = be16_to_cpu(rsp->common.status); |
7d0e4622 | 3950 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
3951 | |
3952 | switch (mad_status) { | |
3953 | case IBMVFC_MAD_SUCCESS: | |
3954 | ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); | |
0aab6c3f | 3955 | vhost->num_targets = be32_to_cpu(rsp->num_written); |
072b91f9 BK |
3956 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); |
3957 | break; | |
3958 | case IBMVFC_MAD_FAILED: | |
7d0e4622 BK |
3959 | level += ibmvfc_retry_host_init(vhost); |
3960 | ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", | |
0aab6c3f TD |
3961 | ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), |
3962 | rsp->status, rsp->error); | |
072b91f9 BK |
3963 | break; |
3964 | case IBMVFC_MAD_DRIVER_FAILED: | |
3965 | break; | |
3966 | default: | |
3967 | dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); | |
3968 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
3969 | break; | |
3970 | } | |
3971 | ||
3972 | ibmvfc_free_event(evt); | |
3973 | wake_up(&vhost->work_wait_q); | |
3974 | } | |
3975 | ||
3976 | /** | |
3977 | * ibmvfc_discover_targets - Send Discover Targets MAD | |
3978 | * @vhost: ibmvfc host struct | |
3979 | * | |
3980 | **/ | |
3981 | static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) | |
3982 | { | |
3983 | struct ibmvfc_discover_targets *mad; | |
3984 | struct ibmvfc_event *evt = ibmvfc_get_event(vhost); | |
3985 | ||
3986 | ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); | |
3987 | mad = &evt->iu.discover_targets; | |
3988 | memset(mad, 0, sizeof(*mad)); | |
0aab6c3f TD |
3989 | mad->common.version = cpu_to_be32(1); |
3990 | mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); | |
3991 | mad->common.length = cpu_to_be16(sizeof(*mad)); | |
3992 | mad->bufflen = cpu_to_be32(vhost->disc_buf_sz); | |
3993 | mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma); | |
3994 | mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz); | |
072b91f9 BK |
3995 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
3996 | ||
3997 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) | |
3998 | ibmvfc_dbg(vhost, "Sent discover targets\n"); | |
3999 | else | |
4000 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
4001 | } | |
4002 | ||
4003 | /** | |
4004 | * ibmvfc_npiv_login_done - Completion handler for NPIV Login | |
4005 | * @evt: ibmvfc event struct | |
4006 | * | |
4007 | **/ | |
4008 | static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) | |
4009 | { | |
4010 | struct ibmvfc_host *vhost = evt->vhost; | |
0aab6c3f | 4011 | u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); |
072b91f9 BK |
4012 | struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; |
4013 | unsigned int npiv_max_sectors; | |
7d0e4622 | 4014 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
4015 | |
4016 | switch (mad_status) { | |
4017 | case IBMVFC_MAD_SUCCESS: | |
4018 | ibmvfc_free_event(evt); | |
4019 | break; | |
4020 | case IBMVFC_MAD_FAILED: | |
0aab6c3f | 4021 | if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) |
7d0e4622 | 4022 | level += ibmvfc_retry_host_init(vhost); |
072b91f9 BK |
4023 | else |
4024 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
7d0e4622 | 4025 | ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", |
0aab6c3f TD |
4026 | ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), |
4027 | rsp->status, rsp->error); | |
072b91f9 BK |
4028 | ibmvfc_free_event(evt); |
4029 | return; | |
4030 | case IBMVFC_MAD_CRQ_ERROR: | |
4031 | ibmvfc_retry_host_init(vhost); | |
4032 | case IBMVFC_MAD_DRIVER_FAILED: | |
4033 | ibmvfc_free_event(evt); | |
4034 | return; | |
4035 | default: | |
4036 | dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); | |
4037 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
4038 | ibmvfc_free_event(evt); | |
4039 | return; | |
4040 | } | |
4041 | ||
4042 | vhost->client_migrated = 0; | |
4043 | ||
0aab6c3f | 4044 | if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { |
072b91f9 BK |
4045 | dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", |
4046 | rsp->flags); | |
4047 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
4048 | wake_up(&vhost->work_wait_q); | |
4049 | return; | |
4050 | } | |
4051 | ||
0aab6c3f | 4052 | if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { |
072b91f9 BK |
4053 | dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", |
4054 | rsp->max_cmds); | |
4055 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
4056 | wake_up(&vhost->work_wait_q); | |
4057 | return; | |
4058 | } | |
4059 | ||
79111d08 | 4060 | vhost->logged_in = 1; |
0aab6c3f | 4061 | npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); |
072b91f9 BK |
4062 | dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", |
4063 | rsp->partition_name, rsp->device_name, rsp->port_loc_code, | |
4064 | rsp->drc_name, npiv_max_sectors); | |
4065 | ||
0aab6c3f TD |
4066 | fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); |
4067 | fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); | |
4068 | fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); | |
4069 | fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); | |
072b91f9 BK |
4070 | fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; |
4071 | fc_host_supported_classes(vhost->host) = 0; | |
0aab6c3f | 4072 | if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) |
072b91f9 | 4073 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; |
0aab6c3f | 4074 | if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) |
072b91f9 | 4075 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; |
0aab6c3f | 4076 | if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) |
072b91f9 BK |
4077 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; |
4078 | fc_host_maxframe_size(vhost->host) = | |
0aab6c3f | 4079 | be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; |
072b91f9 | 4080 | |
0aab6c3f | 4081 | vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; |
072b91f9 BK |
4082 | vhost->host->max_sectors = npiv_max_sectors; |
4083 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); | |
4084 | wake_up(&vhost->work_wait_q); | |
4085 | } | |
4086 | ||
4087 | /** | |
4088 | * ibmvfc_npiv_login - Sends NPIV login | |
4089 | * @vhost: ibmvfc host struct | |
4090 | * | |
4091 | **/ | |
4092 | static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) | |
4093 | { | |
4094 | struct ibmvfc_npiv_login_mad *mad; | |
4095 | struct ibmvfc_event *evt = ibmvfc_get_event(vhost); | |
4096 | ||
4097 | ibmvfc_gather_partition_info(vhost); | |
4098 | ibmvfc_set_login_info(vhost); | |
4099 | ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); | |
4100 | ||
4101 | memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); | |
4102 | mad = &evt->iu.npiv_login; | |
4103 | memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); | |
0aab6c3f TD |
4104 | mad->common.version = cpu_to_be32(1); |
4105 | mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); | |
4106 | mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); | |
4107 | mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); | |
4108 | mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); | |
072b91f9 | 4109 | |
072b91f9 BK |
4110 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
4111 | ||
4112 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) | |
4113 | ibmvfc_dbg(vhost, "Sent NPIV login\n"); | |
4114 | else | |
4115 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
4116 | }; | |
4117 | ||
79111d08 BK |
4118 | /** |
4119 | * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout | |
4120 | * @vhost: ibmvfc host struct | |
4121 | * | |
4122 | **/ | |
4123 | static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) | |
4124 | { | |
4125 | struct ibmvfc_host *vhost = evt->vhost; | |
0aab6c3f | 4126 | u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); |
79111d08 BK |
4127 | |
4128 | ibmvfc_free_event(evt); | |
4129 | ||
4130 | switch (mad_status) { | |
4131 | case IBMVFC_MAD_SUCCESS: | |
4132 | if (list_empty(&vhost->sent) && | |
4133 | vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { | |
861890c6 | 4134 | ibmvfc_init_host(vhost); |
79111d08 BK |
4135 | return; |
4136 | } | |
4137 | break; | |
4138 | case IBMVFC_MAD_FAILED: | |
4139 | case IBMVFC_MAD_NOT_SUPPORTED: | |
4140 | case IBMVFC_MAD_CRQ_ERROR: | |
4141 | case IBMVFC_MAD_DRIVER_FAILED: | |
4142 | default: | |
4143 | ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); | |
4144 | break; | |
4145 | } | |
4146 | ||
4147 | ibmvfc_hard_reset_host(vhost); | |
4148 | } | |
4149 | ||
4150 | /** | |
4151 | * ibmvfc_npiv_logout - Issue an NPIV Logout | |
4152 | * @vhost: ibmvfc host struct | |
4153 | * | |
4154 | **/ | |
4155 | static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) | |
4156 | { | |
4157 | struct ibmvfc_npiv_logout_mad *mad; | |
4158 | struct ibmvfc_event *evt; | |
4159 | ||
4160 | evt = ibmvfc_get_event(vhost); | |
4161 | ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); | |
4162 | ||
4163 | mad = &evt->iu.npiv_logout; | |
4164 | memset(mad, 0, sizeof(*mad)); | |
0aab6c3f TD |
4165 | mad->common.version = cpu_to_be32(1); |
4166 | mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); | |
4167 | mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); | |
79111d08 BK |
4168 | |
4169 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); | |
4170 | ||
4171 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) | |
4172 | ibmvfc_dbg(vhost, "Sent NPIV logout\n"); | |
4173 | else | |
4174 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
4175 | } | |
4176 | ||
072b91f9 BK |
4177 | /** |
4178 | * ibmvfc_dev_init_to_do - Is there target initialization work to do? | |
4179 | * @vhost: ibmvfc host struct | |
4180 | * | |
4181 | * Returns: | |
4182 | * 1 if work to do / 0 if not | |
4183 | **/ | |
4184 | static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) | |
4185 | { | |
4186 | struct ibmvfc_target *tgt; | |
4187 | ||
4188 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
4189 | if (tgt->action == IBMVFC_TGT_ACTION_INIT || | |
4190 | tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) | |
4191 | return 1; | |
4192 | } | |
4193 | ||
4194 | return 0; | |
4195 | } | |
4196 | ||
4197 | /** | |
4198 | * __ibmvfc_work_to_do - Is there task level work to do? (no locking) | |
4199 | * @vhost: ibmvfc host struct | |
4200 | * | |
4201 | * Returns: | |
4202 | * 1 if work to do / 0 if not | |
4203 | **/ | |
4204 | static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) | |
4205 | { | |
4206 | struct ibmvfc_target *tgt; | |
4207 | ||
4208 | if (kthread_should_stop()) | |
4209 | return 1; | |
4210 | switch (vhost->action) { | |
4211 | case IBMVFC_HOST_ACTION_NONE: | |
4212 | case IBMVFC_HOST_ACTION_INIT_WAIT: | |
79111d08 | 4213 | case IBMVFC_HOST_ACTION_LOGO_WAIT: |
072b91f9 BK |
4214 | return 0; |
4215 | case IBMVFC_HOST_ACTION_TGT_INIT: | |
4216 | case IBMVFC_HOST_ACTION_QUERY_TGTS: | |
4217 | if (vhost->discovery_threads == disc_threads) | |
4218 | return 0; | |
4219 | list_for_each_entry(tgt, &vhost->targets, queue) | |
4220 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) | |
4221 | return 1; | |
4222 | list_for_each_entry(tgt, &vhost->targets, queue) | |
4223 | if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) | |
4224 | return 0; | |
4225 | return 1; | |
79111d08 | 4226 | case IBMVFC_HOST_ACTION_LOGO: |
072b91f9 BK |
4227 | case IBMVFC_HOST_ACTION_INIT: |
4228 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: | |
072b91f9 | 4229 | case IBMVFC_HOST_ACTION_TGT_DEL: |
10e79499 | 4230 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 | 4231 | case IBMVFC_HOST_ACTION_QUERY: |
73ee5d86 BK |
4232 | case IBMVFC_HOST_ACTION_RESET: |
4233 | case IBMVFC_HOST_ACTION_REENABLE: | |
072b91f9 BK |
4234 | default: |
4235 | break; | |
f36cfe6a | 4236 | } |
072b91f9 BK |
4237 | |
4238 | return 1; | |
4239 | } | |
4240 | ||
4241 | /** | |
4242 | * ibmvfc_work_to_do - Is there task level work to do? | |
4243 | * @vhost: ibmvfc host struct | |
4244 | * | |
4245 | * Returns: | |
4246 | * 1 if work to do / 0 if not | |
4247 | **/ | |
4248 | static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) | |
4249 | { | |
4250 | unsigned long flags; | |
4251 | int rc; | |
4252 | ||
4253 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4254 | rc = __ibmvfc_work_to_do(vhost); | |
4255 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4256 | return rc; | |
4257 | } | |
4258 | ||
4259 | /** | |
4260 | * ibmvfc_log_ae - Log async events if necessary | |
4261 | * @vhost: ibmvfc host struct | |
4262 | * @events: events to log | |
4263 | * | |
4264 | **/ | |
4265 | static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) | |
4266 | { | |
4267 | if (events & IBMVFC_AE_RSCN) | |
4268 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); | |
4269 | if ((events & IBMVFC_AE_LINKDOWN) && | |
4270 | vhost->state >= IBMVFC_HALTED) | |
4271 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); | |
4272 | if ((events & IBMVFC_AE_LINKUP) && | |
4273 | vhost->state == IBMVFC_INITIALIZING) | |
4274 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); | |
4275 | } | |
4276 | ||
4277 | /** | |
4278 | * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port | |
4279 | * @tgt: ibmvfc target struct | |
4280 | * | |
4281 | **/ | |
4282 | static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) | |
4283 | { | |
4284 | struct ibmvfc_host *vhost = tgt->vhost; | |
43c8da90 | 4285 | struct fc_rport *rport; |
072b91f9 BK |
4286 | unsigned long flags; |
4287 | ||
43c8da90 BK |
4288 | tgt_dbg(tgt, "Adding rport\n"); |
4289 | rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); | |
4290 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4291 | ||
4292 | if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { | |
4293 | tgt_dbg(tgt, "Deleting rport\n"); | |
4294 | list_del(&tgt->queue); | |
d5da3040 | 4295 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); |
0883e3b3 | 4296 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
43c8da90 BK |
4297 | fc_remote_port_delete(rport); |
4298 | del_timer_sync(&tgt->timer); | |
4299 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
0883e3b3 | 4300 | return; |
d5da3040 BK |
4301 | } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { |
4302 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4303 | return; | |
0883e3b3 BK |
4304 | } |
4305 | ||
072b91f9 BK |
4306 | if (rport) { |
4307 | tgt_dbg(tgt, "rport add succeeded\n"); | |
43c8da90 | 4308 | tgt->rport = rport; |
0aab6c3f | 4309 | rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; |
072b91f9 | 4310 | rport->supported_classes = 0; |
52d7e861 | 4311 | tgt->target_id = rport->scsi_target_id; |
0aab6c3f | 4312 | if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) |
072b91f9 | 4313 | rport->supported_classes |= FC_COS_CLASS1; |
0aab6c3f | 4314 | if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) |
072b91f9 | 4315 | rport->supported_classes |= FC_COS_CLASS2; |
0aab6c3f | 4316 | if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) |
072b91f9 | 4317 | rport->supported_classes |= FC_COS_CLASS3; |
d31429e1 | 4318 | if (rport->rqst_q) |
8a78362c | 4319 | blk_queue_max_segments(rport->rqst_q, 1); |
072b91f9 BK |
4320 | } else |
4321 | tgt_dbg(tgt, "rport add failed\n"); | |
4322 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4323 | } | |
4324 | ||
4325 | /** | |
4326 | * ibmvfc_do_work - Do task level work | |
4327 | * @vhost: ibmvfc host struct | |
4328 | * | |
4329 | **/ | |
4330 | static void ibmvfc_do_work(struct ibmvfc_host *vhost) | |
4331 | { | |
4332 | struct ibmvfc_target *tgt; | |
4333 | unsigned long flags; | |
4334 | struct fc_rport *rport; | |
73ee5d86 | 4335 | int rc; |
072b91f9 BK |
4336 | |
4337 | ibmvfc_log_ae(vhost, vhost->events_to_log); | |
4338 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4339 | vhost->events_to_log = 0; | |
4340 | switch (vhost->action) { | |
4341 | case IBMVFC_HOST_ACTION_NONE: | |
79111d08 | 4342 | case IBMVFC_HOST_ACTION_LOGO_WAIT: |
072b91f9 BK |
4343 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
4344 | break; | |
73ee5d86 BK |
4345 | case IBMVFC_HOST_ACTION_RESET: |
4346 | vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; | |
4347 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4348 | rc = ibmvfc_reset_crq(vhost); | |
4349 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
d24099df BK |
4350 | if (rc == H_CLOSED) |
4351 | vio_enable_interrupts(to_vio_dev(vhost->dev)); | |
38553564 BK |
4352 | if (rc || (rc = ibmvfc_send_crq_init(vhost)) || |
4353 | (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { | |
73ee5d86 BK |
4354 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
4355 | dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); | |
4356 | } | |
4357 | break; | |
4358 | case IBMVFC_HOST_ACTION_REENABLE: | |
4359 | vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; | |
4360 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4361 | rc = ibmvfc_reenable_crq_queue(vhost); | |
4362 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4363 | if (rc || (rc = ibmvfc_send_crq_init(vhost))) { | |
4364 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
4365 | dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); | |
4366 | } | |
4367 | break; | |
79111d08 BK |
4368 | case IBMVFC_HOST_ACTION_LOGO: |
4369 | vhost->job_step(vhost); | |
4370 | break; | |
072b91f9 BK |
4371 | case IBMVFC_HOST_ACTION_INIT: |
4372 | BUG_ON(vhost->state != IBMVFC_INITIALIZING); | |
1c41fa82 BK |
4373 | if (vhost->delay_init) { |
4374 | vhost->delay_init = 0; | |
4375 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
d2131b33 | 4376 | ssleep(15); |
1c41fa82 BK |
4377 | return; |
4378 | } else | |
4379 | vhost->job_step(vhost); | |
072b91f9 BK |
4380 | break; |
4381 | case IBMVFC_HOST_ACTION_QUERY: | |
4382 | list_for_each_entry(tgt, &vhost->targets, queue) | |
4383 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); | |
4384 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); | |
4385 | break; | |
4386 | case IBMVFC_HOST_ACTION_QUERY_TGTS: | |
4387 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
4388 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) { | |
4389 | tgt->job_step(tgt); | |
4390 | break; | |
4391 | } | |
4392 | } | |
4393 | ||
4394 | if (!ibmvfc_dev_init_to_do(vhost)) | |
4395 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); | |
4396 | break; | |
4397 | case IBMVFC_HOST_ACTION_TGT_DEL: | |
10e79499 | 4398 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 BK |
4399 | list_for_each_entry(tgt, &vhost->targets, queue) { |
4400 | if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { | |
4401 | tgt_dbg(tgt, "Deleting rport\n"); | |
4402 | rport = tgt->rport; | |
4403 | tgt->rport = NULL; | |
4404 | list_del(&tgt->queue); | |
d5da3040 | 4405 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); |
072b91f9 BK |
4406 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
4407 | if (rport) | |
4408 | fc_remote_port_delete(rport); | |
10501e1c | 4409 | del_timer_sync(&tgt->timer); |
072b91f9 BK |
4410 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
4411 | return; | |
4412 | } | |
4413 | } | |
4414 | ||
4415 | if (vhost->state == IBMVFC_INITIALIZING) { | |
10e79499 | 4416 | if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { |
43c8da90 BK |
4417 | if (vhost->reinit) { |
4418 | vhost->reinit = 0; | |
4419 | scsi_block_requests(vhost->host); | |
4420 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); | |
4421 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4422 | } else { | |
4423 | ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); | |
4424 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); | |
4425 | wake_up(&vhost->init_wait_q); | |
4426 | schedule_work(&vhost->rport_add_work_q); | |
4427 | vhost->init_retries = 0; | |
4428 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4429 | scsi_unblock_requests(vhost->host); | |
4430 | } | |
4431 | ||
10e79499 BK |
4432 | return; |
4433 | } else { | |
4434 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); | |
4435 | vhost->job_step = ibmvfc_discover_targets; | |
4436 | } | |
072b91f9 BK |
4437 | } else { |
4438 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); | |
4439 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4440 | scsi_unblock_requests(vhost->host); | |
4441 | wake_up(&vhost->init_wait_q); | |
4442 | return; | |
4443 | } | |
4444 | break; | |
4445 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: | |
4446 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); | |
4447 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4448 | ibmvfc_alloc_targets(vhost); | |
4449 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4450 | break; | |
4451 | case IBMVFC_HOST_ACTION_TGT_INIT: | |
4452 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
4453 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) { | |
4454 | tgt->job_step(tgt); | |
4455 | break; | |
4456 | } | |
4457 | } | |
4458 | ||
10e79499 BK |
4459 | if (!ibmvfc_dev_init_to_do(vhost)) |
4460 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); | |
072b91f9 | 4461 | break; |
072b91f9 BK |
4462 | default: |
4463 | break; | |
f36cfe6a | 4464 | } |
072b91f9 BK |
4465 | |
4466 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4467 | } | |
4468 | ||
4469 | /** | |
4470 | * ibmvfc_work - Do task level work | |
4471 | * @data: ibmvfc host struct | |
4472 | * | |
4473 | * Returns: | |
4474 | * zero | |
4475 | **/ | |
4476 | static int ibmvfc_work(void *data) | |
4477 | { | |
4478 | struct ibmvfc_host *vhost = data; | |
4479 | int rc; | |
4480 | ||
8698a745 | 4481 | set_user_nice(current, MIN_NICE); |
072b91f9 BK |
4482 | |
4483 | while (1) { | |
4484 | rc = wait_event_interruptible(vhost->work_wait_q, | |
4485 | ibmvfc_work_to_do(vhost)); | |
4486 | ||
4487 | BUG_ON(rc); | |
4488 | ||
4489 | if (kthread_should_stop()) | |
4490 | break; | |
4491 | ||
4492 | ibmvfc_do_work(vhost); | |
4493 | } | |
4494 | ||
4495 | ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); | |
4496 | return 0; | |
4497 | } | |
4498 | ||
4499 | /** | |
4500 | * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor | |
4501 | * @vhost: ibmvfc host struct | |
4502 | * | |
4503 | * Allocates a page for messages, maps it for dma, and registers | |
4504 | * the crq with the hypervisor. | |
4505 | * | |
4506 | * Return value: | |
4507 | * zero on success / other on failure | |
4508 | **/ | |
4509 | static int ibmvfc_init_crq(struct ibmvfc_host *vhost) | |
4510 | { | |
4511 | int rc, retrc = -ENOMEM; | |
4512 | struct device *dev = vhost->dev; | |
4513 | struct vio_dev *vdev = to_vio_dev(dev); | |
4514 | struct ibmvfc_crq_queue *crq = &vhost->crq; | |
4515 | ||
4516 | ENTER; | |
4517 | crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); | |
4518 | ||
4519 | if (!crq->msgs) | |
4520 | return -ENOMEM; | |
4521 | ||
4522 | crq->size = PAGE_SIZE / sizeof(*crq->msgs); | |
4523 | crq->msg_token = dma_map_single(dev, crq->msgs, | |
4524 | PAGE_SIZE, DMA_BIDIRECTIONAL); | |
4525 | ||
8d8bb39b | 4526 | if (dma_mapping_error(dev, crq->msg_token)) |
072b91f9 BK |
4527 | goto map_failed; |
4528 | ||
4529 | retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, | |
4530 | crq->msg_token, PAGE_SIZE); | |
4531 | ||
4532 | if (rc == H_RESOURCE) | |
4533 | /* maybe kexecing and resource is busy. try a reset */ | |
4534 | retrc = rc = ibmvfc_reset_crq(vhost); | |
4535 | ||
4536 | if (rc == H_CLOSED) | |
4537 | dev_warn(dev, "Partner adapter not ready\n"); | |
4538 | else if (rc) { | |
4539 | dev_warn(dev, "Error %d opening adapter\n", rc); | |
4540 | goto reg_crq_failed; | |
4541 | } | |
4542 | ||
4543 | retrc = 0; | |
4544 | ||
039a0898 BK |
4545 | tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); |
4546 | ||
072b91f9 BK |
4547 | if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { |
4548 | dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); | |
4549 | goto req_irq_failed; | |
4550 | } | |
4551 | ||
4552 | if ((rc = vio_enable_interrupts(vdev))) { | |
4553 | dev_err(dev, "Error %d enabling interrupts\n", rc); | |
4554 | goto req_irq_failed; | |
4555 | } | |
4556 | ||
4557 | crq->cur = 0; | |
4558 | LEAVE; | |
4559 | return retrc; | |
4560 | ||
4561 | req_irq_failed: | |
039a0898 | 4562 | tasklet_kill(&vhost->tasklet); |
072b91f9 BK |
4563 | do { |
4564 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); | |
4565 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
4566 | reg_crq_failed: | |
4567 | dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); | |
4568 | map_failed: | |
4569 | free_page((unsigned long)crq->msgs); | |
4570 | return retrc; | |
4571 | } | |
4572 | ||
4573 | /** | |
4574 | * ibmvfc_free_mem - Free memory for vhost | |
4575 | * @vhost: ibmvfc host struct | |
4576 | * | |
4577 | * Return value: | |
4578 | * none | |
4579 | **/ | |
4580 | static void ibmvfc_free_mem(struct ibmvfc_host *vhost) | |
4581 | { | |
4582 | struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; | |
4583 | ||
4584 | ENTER; | |
4585 | mempool_destroy(vhost->tgt_pool); | |
4586 | kfree(vhost->trace); | |
4587 | dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, | |
4588 | vhost->disc_buf_dma); | |
4589 | dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), | |
4590 | vhost->login_buf, vhost->login_buf_dma); | |
4591 | dma_pool_destroy(vhost->sg_pool); | |
4592 | dma_unmap_single(vhost->dev, async_q->msg_token, | |
4593 | async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); | |
4594 | free_page((unsigned long)async_q->msgs); | |
4595 | LEAVE; | |
4596 | } | |
4597 | ||
4598 | /** | |
4599 | * ibmvfc_alloc_mem - Allocate memory for vhost | |
4600 | * @vhost: ibmvfc host struct | |
4601 | * | |
4602 | * Return value: | |
4603 | * 0 on success / non-zero on failure | |
4604 | **/ | |
4605 | static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) | |
4606 | { | |
4607 | struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; | |
4608 | struct device *dev = vhost->dev; | |
4609 | ||
4610 | ENTER; | |
4611 | async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); | |
4612 | if (!async_q->msgs) { | |
4613 | dev_err(dev, "Couldn't allocate async queue.\n"); | |
4614 | goto nomem; | |
4615 | } | |
4616 | ||
4617 | async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); | |
4618 | async_q->msg_token = dma_map_single(dev, async_q->msgs, | |
4619 | async_q->size * sizeof(*async_q->msgs), | |
4620 | DMA_BIDIRECTIONAL); | |
4621 | ||
8d8bb39b | 4622 | if (dma_mapping_error(dev, async_q->msg_token)) { |
072b91f9 BK |
4623 | dev_err(dev, "Failed to map async queue\n"); |
4624 | goto free_async_crq; | |
4625 | } | |
4626 | ||
4627 | vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, | |
4628 | SG_ALL * sizeof(struct srp_direct_buf), | |
4629 | sizeof(struct srp_direct_buf), 0); | |
4630 | ||
4631 | if (!vhost->sg_pool) { | |
4632 | dev_err(dev, "Failed to allocate sg pool\n"); | |
4633 | goto unmap_async_crq; | |
4634 | } | |
4635 | ||
4636 | vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), | |
4637 | &vhost->login_buf_dma, GFP_KERNEL); | |
4638 | ||
4639 | if (!vhost->login_buf) { | |
4640 | dev_err(dev, "Couldn't allocate NPIV login buffer\n"); | |
4641 | goto free_sg_pool; | |
4642 | } | |
4643 | ||
4644 | vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; | |
4645 | vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, | |
4646 | &vhost->disc_buf_dma, GFP_KERNEL); | |
4647 | ||
4648 | if (!vhost->disc_buf) { | |
4649 | dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); | |
4650 | goto free_login_buffer; | |
4651 | } | |
4652 | ||
4653 | vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, | |
4654 | sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); | |
4655 | ||
4656 | if (!vhost->trace) | |
4657 | goto free_disc_buffer; | |
4658 | ||
d6886692 | 4659 | vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, |
072b91f9 BK |
4660 | sizeof(struct ibmvfc_target)); |
4661 | ||
4662 | if (!vhost->tgt_pool) { | |
4663 | dev_err(dev, "Couldn't allocate target memory pool\n"); | |
4664 | goto free_trace; | |
4665 | } | |
4666 | ||
4667 | LEAVE; | |
4668 | return 0; | |
4669 | ||
4670 | free_trace: | |
4671 | kfree(vhost->trace); | |
4672 | free_disc_buffer: | |
4673 | dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, | |
4674 | vhost->disc_buf_dma); | |
4675 | free_login_buffer: | |
4676 | dma_free_coherent(dev, sizeof(*vhost->login_buf), | |
4677 | vhost->login_buf, vhost->login_buf_dma); | |
4678 | free_sg_pool: | |
4679 | dma_pool_destroy(vhost->sg_pool); | |
4680 | unmap_async_crq: | |
4681 | dma_unmap_single(dev, async_q->msg_token, | |
4682 | async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); | |
4683 | free_async_crq: | |
4684 | free_page((unsigned long)async_q->msgs); | |
4685 | nomem: | |
4686 | LEAVE; | |
4687 | return -ENOMEM; | |
4688 | } | |
4689 | ||
43c8da90 BK |
4690 | /** |
4691 | * ibmvfc_rport_add_thread - Worker thread for rport adds | |
4692 | * @work: work struct | |
4693 | * | |
4694 | **/ | |
4695 | static void ibmvfc_rport_add_thread(struct work_struct *work) | |
4696 | { | |
4697 | struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, | |
4698 | rport_add_work_q); | |
4699 | struct ibmvfc_target *tgt; | |
4700 | struct fc_rport *rport; | |
4701 | unsigned long flags; | |
4702 | int did_work; | |
4703 | ||
4704 | ENTER; | |
4705 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4706 | do { | |
4707 | did_work = 0; | |
4708 | if (vhost->state != IBMVFC_ACTIVE) | |
4709 | break; | |
4710 | ||
4711 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
4712 | if (tgt->add_rport) { | |
4713 | did_work = 1; | |
4714 | tgt->add_rport = 0; | |
4715 | kref_get(&tgt->kref); | |
4716 | rport = tgt->rport; | |
4717 | if (!rport) { | |
4718 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4719 | ibmvfc_tgt_add_rport(tgt); | |
4720 | } else if (get_device(&rport->dev)) { | |
4721 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4722 | tgt_dbg(tgt, "Setting rport roles\n"); | |
4723 | fc_remote_port_rolechg(rport, tgt->ids.roles); | |
4724 | put_device(&rport->dev); | |
0073887a DC |
4725 | } else { |
4726 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
43c8da90 BK |
4727 | } |
4728 | ||
4729 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4730 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4731 | break; | |
4732 | } | |
4733 | } | |
4734 | } while(did_work); | |
4735 | ||
4736 | if (vhost->state == IBMVFC_ACTIVE) | |
4737 | vhost->scan_complete = 1; | |
4738 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4739 | LEAVE; | |
4740 | } | |
4741 | ||
072b91f9 BK |
4742 | /** |
4743 | * ibmvfc_probe - Adapter hot plug add entry point | |
4744 | * @vdev: vio device struct | |
4745 | * @id: vio device id struct | |
4746 | * | |
4747 | * Return value: | |
4748 | * 0 on success / non-zero on failure | |
4749 | **/ | |
4750 | static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) | |
4751 | { | |
4752 | struct ibmvfc_host *vhost; | |
4753 | struct Scsi_Host *shost; | |
4754 | struct device *dev = &vdev->dev; | |
4755 | int rc = -ENOMEM; | |
4756 | ||
4757 | ENTER; | |
4758 | shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); | |
4759 | if (!shost) { | |
4760 | dev_err(dev, "Couldn't allocate host data\n"); | |
4761 | goto out; | |
4762 | } | |
4763 | ||
4764 | shost->transportt = ibmvfc_transport_template; | |
4765 | shost->can_queue = max_requests; | |
4766 | shost->max_lun = max_lun; | |
4767 | shost->max_id = max_targets; | |
4768 | shost->max_sectors = IBMVFC_MAX_SECTORS; | |
4769 | shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; | |
4770 | shost->unique_id = shost->host_no; | |
4771 | ||
4772 | vhost = shost_priv(shost); | |
4773 | INIT_LIST_HEAD(&vhost->sent); | |
4774 | INIT_LIST_HEAD(&vhost->free); | |
4775 | INIT_LIST_HEAD(&vhost->targets); | |
4776 | sprintf(vhost->name, IBMVFC_NAME); | |
4777 | vhost->host = shost; | |
4778 | vhost->dev = dev; | |
4779 | vhost->partition_number = -1; | |
4780 | vhost->log_level = log_level; | |
10501e1c | 4781 | vhost->task_set = 1; |
072b91f9 BK |
4782 | strcpy(vhost->partition_name, "UNKNOWN"); |
4783 | init_waitqueue_head(&vhost->work_wait_q); | |
4784 | init_waitqueue_head(&vhost->init_wait_q); | |
43c8da90 | 4785 | INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); |
d31429e1 | 4786 | mutex_init(&vhost->passthru_mutex); |
072b91f9 BK |
4787 | |
4788 | if ((rc = ibmvfc_alloc_mem(vhost))) | |
4789 | goto free_scsi_host; | |
4790 | ||
4791 | vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, | |
4792 | shost->host_no); | |
4793 | ||
4794 | if (IS_ERR(vhost->work_thread)) { | |
4795 | dev_err(dev, "Couldn't create kernel thread: %ld\n", | |
4796 | PTR_ERR(vhost->work_thread)); | |
4797 | goto free_host_mem; | |
4798 | } | |
4799 | ||
4800 | if ((rc = ibmvfc_init_crq(vhost))) { | |
4801 | dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); | |
4802 | goto kill_kthread; | |
4803 | } | |
4804 | ||
4805 | if ((rc = ibmvfc_init_event_pool(vhost))) { | |
4806 | dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); | |
4807 | goto release_crq; | |
4808 | } | |
4809 | ||
4810 | if ((rc = scsi_add_host(shost, dev))) | |
4811 | goto release_event_pool; | |
4812 | ||
a5110f29 MC |
4813 | fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; |
4814 | ||
072b91f9 BK |
4815 | if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, |
4816 | &ibmvfc_trace_attr))) { | |
4817 | dev_err(dev, "Failed to create trace file. rc=%d\n", rc); | |
4818 | goto remove_shost; | |
4819 | } | |
4820 | ||
d31429e1 | 4821 | if (shost_to_fc_host(shost)->rqst_q) |
8a78362c | 4822 | blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); |
072b91f9 BK |
4823 | dev_set_drvdata(dev, vhost); |
4824 | spin_lock(&ibmvfc_driver_lock); | |
4825 | list_add_tail(&vhost->queue, &ibmvfc_head); | |
4826 | spin_unlock(&ibmvfc_driver_lock); | |
4827 | ||
4828 | ibmvfc_send_crq_init(vhost); | |
4829 | scsi_scan_host(shost); | |
4830 | return 0; | |
4831 | ||
4832 | remove_shost: | |
4833 | scsi_remove_host(shost); | |
4834 | release_event_pool: | |
4835 | ibmvfc_free_event_pool(vhost); | |
4836 | release_crq: | |
4837 | ibmvfc_release_crq_queue(vhost); | |
4838 | kill_kthread: | |
4839 | kthread_stop(vhost->work_thread); | |
4840 | free_host_mem: | |
4841 | ibmvfc_free_mem(vhost); | |
4842 | free_scsi_host: | |
4843 | scsi_host_put(shost); | |
4844 | out: | |
4845 | LEAVE; | |
4846 | return rc; | |
4847 | } | |
4848 | ||
4849 | /** | |
4850 | * ibmvfc_remove - Adapter hot plug remove entry point | |
4851 | * @vdev: vio device struct | |
4852 | * | |
4853 | * Return value: | |
4854 | * 0 | |
4855 | **/ | |
4856 | static int ibmvfc_remove(struct vio_dev *vdev) | |
4857 | { | |
4858 | struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); | |
4859 | unsigned long flags; | |
4860 | ||
4861 | ENTER; | |
4862 | ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); | |
70431105 BK |
4863 | |
4864 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2d0da2a4 | 4865 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
70431105 BK |
4866 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
4867 | ||
2d0da2a4 BK |
4868 | ibmvfc_wait_while_resetting(vhost); |
4869 | ibmvfc_release_crq_queue(vhost); | |
072b91f9 BK |
4870 | kthread_stop(vhost->work_thread); |
4871 | fc_remove_host(vhost->host); | |
4872 | scsi_remove_host(vhost->host); | |
072b91f9 BK |
4873 | |
4874 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4875 | ibmvfc_purge_requests(vhost, DID_ERROR); | |
4876 | ibmvfc_free_event_pool(vhost); | |
4877 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4878 | ||
4879 | ibmvfc_free_mem(vhost); | |
4880 | spin_lock(&ibmvfc_driver_lock); | |
4881 | list_del(&vhost->queue); | |
4882 | spin_unlock(&ibmvfc_driver_lock); | |
4883 | scsi_host_put(vhost->host); | |
4884 | LEAVE; | |
4885 | return 0; | |
4886 | } | |
4887 | ||
b0f4d4cf BK |
4888 | /** |
4889 | * ibmvfc_resume - Resume from suspend | |
4890 | * @dev: device struct | |
4891 | * | |
4892 | * We may have lost an interrupt across suspend/resume, so kick the | |
4893 | * interrupt handler | |
4894 | * | |
4895 | */ | |
4896 | static int ibmvfc_resume(struct device *dev) | |
4897 | { | |
4898 | unsigned long flags; | |
4899 | struct ibmvfc_host *vhost = dev_get_drvdata(dev); | |
4900 | struct vio_dev *vdev = to_vio_dev(dev); | |
4901 | ||
4902 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4903 | vio_disable_interrupts(vdev); | |
4904 | tasklet_schedule(&vhost->tasklet); | |
4905 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4906 | return 0; | |
4907 | } | |
4908 | ||
39c1ffec BK |
4909 | /** |
4910 | * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver | |
4911 | * @vdev: vio device struct | |
4912 | * | |
4913 | * Return value: | |
4914 | * Number of bytes the driver will need to DMA map at the same time in | |
4915 | * order to perform well. | |
4916 | */ | |
4917 | static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) | |
4918 | { | |
4919 | unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); | |
4920 | return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); | |
4921 | } | |
4922 | ||
e4df3eaa | 4923 | static const struct vio_device_id ibmvfc_device_table[] = { |
072b91f9 BK |
4924 | {"fcp", "IBM,vfc-client"}, |
4925 | { "", "" } | |
4926 | }; | |
4927 | MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); | |
4928 | ||
e4a80c31 | 4929 | static const struct dev_pm_ops ibmvfc_pm_ops = { |
b0f4d4cf BK |
4930 | .resume = ibmvfc_resume |
4931 | }; | |
4932 | ||
072b91f9 BK |
4933 | static struct vio_driver ibmvfc_driver = { |
4934 | .id_table = ibmvfc_device_table, | |
4935 | .probe = ibmvfc_probe, | |
4936 | .remove = ibmvfc_remove, | |
39c1ffec | 4937 | .get_desired_dma = ibmvfc_get_desired_dma, |
cb52d897 BH |
4938 | .name = IBMVFC_NAME, |
4939 | .pm = &ibmvfc_pm_ops, | |
072b91f9 BK |
4940 | }; |
4941 | ||
4942 | static struct fc_function_template ibmvfc_transport_functions = { | |
4943 | .show_host_fabric_name = 1, | |
4944 | .show_host_node_name = 1, | |
4945 | .show_host_port_name = 1, | |
4946 | .show_host_supported_classes = 1, | |
4947 | .show_host_port_type = 1, | |
4948 | .show_host_port_id = 1, | |
9ab3610f | 4949 | .show_host_maxframe_size = 1, |
072b91f9 BK |
4950 | |
4951 | .get_host_port_state = ibmvfc_get_host_port_state, | |
4952 | .show_host_port_state = 1, | |
4953 | ||
4954 | .get_host_speed = ibmvfc_get_host_speed, | |
4955 | .show_host_speed = 1, | |
4956 | ||
4957 | .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, | |
4958 | .terminate_rport_io = ibmvfc_terminate_rport_io, | |
4959 | ||
4960 | .show_rport_maxframe_size = 1, | |
4961 | .show_rport_supported_classes = 1, | |
4962 | ||
4963 | .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, | |
4964 | .show_rport_dev_loss_tmo = 1, | |
4965 | ||
4966 | .get_starget_node_name = ibmvfc_get_starget_node_name, | |
4967 | .show_starget_node_name = 1, | |
4968 | ||
4969 | .get_starget_port_name = ibmvfc_get_starget_port_name, | |
4970 | .show_starget_port_name = 1, | |
4971 | ||
4972 | .get_starget_port_id = ibmvfc_get_starget_port_id, | |
4973 | .show_starget_port_id = 1, | |
d31429e1 BK |
4974 | |
4975 | .bsg_request = ibmvfc_bsg_request, | |
4976 | .bsg_timeout = ibmvfc_bsg_timeout, | |
072b91f9 BK |
4977 | }; |
4978 | ||
4979 | /** | |
4980 | * ibmvfc_module_init - Initialize the ibmvfc module | |
4981 | * | |
4982 | * Return value: | |
4983 | * 0 on success / other on failure | |
4984 | **/ | |
4985 | static int __init ibmvfc_module_init(void) | |
4986 | { | |
4987 | int rc; | |
4988 | ||
4989 | if (!firmware_has_feature(FW_FEATURE_VIO)) | |
4990 | return -ENODEV; | |
4991 | ||
4992 | printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", | |
4993 | IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); | |
4994 | ||
4995 | ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); | |
4996 | if (!ibmvfc_transport_template) | |
4997 | return -ENOMEM; | |
4998 | ||
4999 | rc = vio_register_driver(&ibmvfc_driver); | |
5000 | if (rc) | |
5001 | fc_release_transport(ibmvfc_transport_template); | |
5002 | return rc; | |
5003 | } | |
5004 | ||
5005 | /** | |
5006 | * ibmvfc_module_exit - Teardown the ibmvfc module | |
5007 | * | |
5008 | * Return value: | |
5009 | * nothing | |
5010 | **/ | |
5011 | static void __exit ibmvfc_module_exit(void) | |
5012 | { | |
5013 | vio_unregister_driver(&ibmvfc_driver); | |
5014 | fc_release_transport(ibmvfc_transport_template); | |
5015 | } | |
5016 | ||
5017 | module_init(ibmvfc_module_init); | |
5018 | module_exit(ibmvfc_module_exit); |