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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 BK |
34 | #include <linux/stringify.h> |
35 | #include <asm/firmware.h> | |
36 | #include <asm/irq.h> | |
37 | #include <asm/vio.h> | |
38 | #include <scsi/scsi.h> | |
39 | #include <scsi/scsi_cmnd.h> | |
40 | #include <scsi/scsi_host.h> | |
41 | #include <scsi/scsi_device.h> | |
42 | #include <scsi/scsi_tcq.h> | |
43 | #include <scsi/scsi_transport_fc.h> | |
d31429e1 | 44 | #include <scsi/scsi_bsg_fc.h> |
072b91f9 BK |
45 | #include "ibmvfc.h" |
46 | ||
47 | static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; | |
48 | static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; | |
1abf635d | 49 | static u64 max_lun = IBMVFC_MAX_LUN; |
072b91f9 BK |
50 | static unsigned int max_targets = IBMVFC_MAX_TARGETS; |
51 | static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; | |
52 | static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; | |
072b91f9 BK |
53 | static unsigned int ibmvfc_debug = IBMVFC_DEBUG; |
54 | static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; | |
55 | static LIST_HEAD(ibmvfc_head); | |
56 | static DEFINE_SPINLOCK(ibmvfc_driver_lock); | |
57 | static struct scsi_transport_template *ibmvfc_transport_template; | |
58 | ||
59 | MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); | |
60 | MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); | |
61 | MODULE_LICENSE("GPL"); | |
62 | MODULE_VERSION(IBMVFC_DRIVER_VERSION); | |
63 | ||
64 | module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); | |
65 | MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " | |
66 | "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); | |
67 | module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); | |
68 | MODULE_PARM_DESC(default_timeout, | |
69 | "Default timeout in seconds for initialization and EH commands. " | |
70 | "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); | |
71 | module_param_named(max_requests, max_requests, uint, S_IRUGO); | |
72 | MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " | |
73 | "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); | |
1abf635d | 74 | module_param_named(max_lun, max_lun, ullong, S_IRUGO); |
072b91f9 BK |
75 | MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " |
76 | "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); | |
77 | module_param_named(max_targets, max_targets, uint, S_IRUGO); | |
78 | MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " | |
79 | "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); | |
545ef9a2 | 80 | module_param_named(disc_threads, disc_threads, uint, S_IRUGO); |
072b91f9 BK |
81 | MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " |
82 | "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); | |
83 | module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); | |
84 | MODULE_PARM_DESC(debug, "Enable driver debug information. " | |
85 | "[Default=" __stringify(IBMVFC_DEBUG) "]"); | |
072b91f9 BK |
86 | module_param_named(log_level, log_level, uint, 0); |
87 | MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " | |
88 | "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); | |
89 | ||
90 | static const struct { | |
91 | u16 status; | |
92 | u16 error; | |
93 | u8 result; | |
94 | u8 retry; | |
95 | int log; | |
96 | char *name; | |
97 | } cmd_status [] = { | |
98 | { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, | |
99 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, | |
100 | { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, | |
752b3232 | 101 | { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, |
072b91f9 BK |
102 | { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, |
103 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, | |
104 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, | |
105 | { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, | |
106 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, | |
107 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, | |
108 | { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, | |
109 | { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, | |
497f9c50 | 110 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, |
072b91f9 BK |
111 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, |
112 | ||
113 | { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, | |
114 | { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, | |
752b3232 BK |
115 | { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, |
116 | { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, | |
072b91f9 | 117 | { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, |
752b3232 BK |
118 | { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, |
119 | { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, | |
072b91f9 | 120 | { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, |
646d3857 | 121 | { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, |
072b91f9 BK |
122 | { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, |
123 | ||
124 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, | |
125 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, | |
126 | { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, | |
127 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, | |
128 | { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, | |
129 | { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, | |
130 | { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, | |
131 | { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, | |
132 | { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, | |
133 | { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, | |
134 | { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, | |
135 | ||
136 | { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, | |
137 | }; | |
138 | ||
139 | static void ibmvfc_npiv_login(struct ibmvfc_host *); | |
140 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); | |
141 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); | |
142 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *); | |
79111d08 | 143 | static void ibmvfc_npiv_logout(struct ibmvfc_host *); |
072b91f9 BK |
144 | |
145 | static const char *unknown_error = "unknown error"; | |
146 | ||
147 | #ifdef CONFIG_SCSI_IBMVFC_TRACE | |
148 | /** | |
149 | * ibmvfc_trc_start - Log a start trace entry | |
150 | * @evt: ibmvfc event struct | |
151 | * | |
152 | **/ | |
153 | static void ibmvfc_trc_start(struct ibmvfc_event *evt) | |
154 | { | |
155 | struct ibmvfc_host *vhost = evt->vhost; | |
156 | struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; | |
157 | struct ibmvfc_mad_common *mad = &evt->iu.mad_common; | |
158 | struct ibmvfc_trace_entry *entry; | |
159 | ||
160 | entry = &vhost->trace[vhost->trace_index++]; | |
161 | entry->evt = evt; | |
162 | entry->time = jiffies; | |
163 | entry->fmt = evt->crq.format; | |
164 | entry->type = IBMVFC_TRC_START; | |
165 | ||
166 | switch (entry->fmt) { | |
167 | case IBMVFC_CMD_FORMAT: | |
168 | entry->op_code = vfc_cmd->iu.cdb[0]; | |
0aab6c3f | 169 | entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); |
072b91f9 BK |
170 | entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); |
171 | entry->tmf_flags = vfc_cmd->iu.tmf_flags; | |
0aab6c3f | 172 | entry->u.start.xfer_len = be32_to_cpu(vfc_cmd->iu.xfer_len); |
072b91f9 BK |
173 | break; |
174 | case IBMVFC_MAD_FORMAT: | |
0aab6c3f | 175 | entry->op_code = be32_to_cpu(mad->opcode); |
072b91f9 BK |
176 | break; |
177 | default: | |
178 | break; | |
179 | }; | |
180 | } | |
181 | ||
182 | /** | |
183 | * ibmvfc_trc_end - Log an end trace entry | |
184 | * @evt: ibmvfc event struct | |
185 | * | |
186 | **/ | |
187 | static void ibmvfc_trc_end(struct ibmvfc_event *evt) | |
188 | { | |
189 | struct ibmvfc_host *vhost = evt->vhost; | |
190 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
191 | struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; | |
192 | struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; | |
193 | ||
194 | entry->evt = evt; | |
195 | entry->time = jiffies; | |
196 | entry->fmt = evt->crq.format; | |
197 | entry->type = IBMVFC_TRC_END; | |
198 | ||
199 | switch (entry->fmt) { | |
200 | case IBMVFC_CMD_FORMAT: | |
201 | entry->op_code = vfc_cmd->iu.cdb[0]; | |
0aab6c3f | 202 | entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); |
072b91f9 BK |
203 | entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); |
204 | entry->tmf_flags = vfc_cmd->iu.tmf_flags; | |
0aab6c3f TD |
205 | entry->u.end.status = be16_to_cpu(vfc_cmd->status); |
206 | entry->u.end.error = be16_to_cpu(vfc_cmd->error); | |
072b91f9 BK |
207 | entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; |
208 | entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; | |
209 | entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; | |
210 | break; | |
211 | case IBMVFC_MAD_FORMAT: | |
0aab6c3f TD |
212 | entry->op_code = be32_to_cpu(mad->opcode); |
213 | entry->u.end.status = be16_to_cpu(mad->status); | |
072b91f9 BK |
214 | break; |
215 | default: | |
216 | break; | |
217 | ||
218 | }; | |
219 | } | |
220 | ||
221 | #else | |
222 | #define ibmvfc_trc_start(evt) do { } while (0) | |
223 | #define ibmvfc_trc_end(evt) do { } while (0) | |
224 | #endif | |
225 | ||
226 | /** | |
227 | * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response | |
228 | * @status: status / error class | |
229 | * @error: error | |
230 | * | |
231 | * Return value: | |
232 | * index into cmd_status / -EINVAL on failure | |
233 | **/ | |
234 | static int ibmvfc_get_err_index(u16 status, u16 error) | |
235 | { | |
236 | int i; | |
237 | ||
238 | for (i = 0; i < ARRAY_SIZE(cmd_status); i++) | |
239 | if ((cmd_status[i].status & status) == cmd_status[i].status && | |
240 | cmd_status[i].error == error) | |
241 | return i; | |
242 | ||
243 | return -EINVAL; | |
244 | } | |
245 | ||
246 | /** | |
247 | * ibmvfc_get_cmd_error - Find the error description for the fcp response | |
248 | * @status: status / error class | |
249 | * @error: error | |
250 | * | |
251 | * Return value: | |
252 | * error description string | |
253 | **/ | |
254 | static const char *ibmvfc_get_cmd_error(u16 status, u16 error) | |
255 | { | |
256 | int rc = ibmvfc_get_err_index(status, error); | |
257 | if (rc >= 0) | |
258 | return cmd_status[rc].name; | |
259 | return unknown_error; | |
260 | } | |
261 | ||
262 | /** | |
263 | * ibmvfc_get_err_result - Find the scsi status to return for the fcp response | |
264 | * @vfc_cmd: ibmvfc command struct | |
265 | * | |
266 | * Return value: | |
267 | * SCSI result value to return for completed command | |
268 | **/ | |
269 | static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) | |
270 | { | |
271 | int err; | |
272 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; | |
0aab6c3f | 273 | int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len); |
072b91f9 BK |
274 | |
275 | if ((rsp->flags & FCP_RSP_LEN_VALID) && | |
4a2837d4 | 276 | ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || |
072b91f9 BK |
277 | rsp->data.info.rsp_code)) |
278 | return DID_ERROR << 16; | |
279 | ||
0aab6c3f | 280 | err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); |
072b91f9 BK |
281 | if (err >= 0) |
282 | return rsp->scsi_status | (cmd_status[err].result << 16); | |
283 | return rsp->scsi_status | (DID_ERROR << 16); | |
284 | } | |
285 | ||
286 | /** | |
287 | * ibmvfc_retry_cmd - Determine if error status is retryable | |
288 | * @status: status / error class | |
289 | * @error: error | |
290 | * | |
291 | * Return value: | |
292 | * 1 if error should be retried / 0 if it should not | |
293 | **/ | |
294 | static int ibmvfc_retry_cmd(u16 status, u16 error) | |
295 | { | |
296 | int rc = ibmvfc_get_err_index(status, error); | |
297 | ||
298 | if (rc >= 0) | |
299 | return cmd_status[rc].retry; | |
300 | return 1; | |
301 | } | |
302 | ||
303 | static const char *unknown_fc_explain = "unknown fc explain"; | |
304 | ||
305 | static const struct { | |
306 | u16 fc_explain; | |
307 | char *name; | |
308 | } ls_explain [] = { | |
309 | { 0x00, "no additional explanation" }, | |
310 | { 0x01, "service parameter error - options" }, | |
311 | { 0x03, "service parameter error - initiator control" }, | |
312 | { 0x05, "service parameter error - recipient control" }, | |
313 | { 0x07, "service parameter error - received data field size" }, | |
314 | { 0x09, "service parameter error - concurrent seq" }, | |
315 | { 0x0B, "service parameter error - credit" }, | |
316 | { 0x0D, "invalid N_Port/F_Port_Name" }, | |
317 | { 0x0E, "invalid node/Fabric Name" }, | |
318 | { 0x0F, "invalid common service parameters" }, | |
319 | { 0x11, "invalid association header" }, | |
320 | { 0x13, "association header required" }, | |
321 | { 0x15, "invalid originator S_ID" }, | |
322 | { 0x17, "invalid OX_ID-RX-ID combination" }, | |
323 | { 0x19, "command (request) already in progress" }, | |
324 | { 0x1E, "N_Port Login requested" }, | |
325 | { 0x1F, "Invalid N_Port_ID" }, | |
326 | }; | |
327 | ||
328 | static const struct { | |
329 | u16 fc_explain; | |
330 | char *name; | |
331 | } gs_explain [] = { | |
332 | { 0x00, "no additional explanation" }, | |
333 | { 0x01, "port identifier not registered" }, | |
334 | { 0x02, "port name not registered" }, | |
335 | { 0x03, "node name not registered" }, | |
336 | { 0x04, "class of service not registered" }, | |
337 | { 0x06, "initial process associator not registered" }, | |
338 | { 0x07, "FC-4 TYPEs not registered" }, | |
339 | { 0x08, "symbolic port name not registered" }, | |
340 | { 0x09, "symbolic node name not registered" }, | |
341 | { 0x0A, "port type not registered" }, | |
342 | { 0xF0, "authorization exception" }, | |
343 | { 0xF1, "authentication exception" }, | |
344 | { 0xF2, "data base full" }, | |
345 | { 0xF3, "data base empty" }, | |
346 | { 0xF4, "processing request" }, | |
347 | { 0xF5, "unable to verify connection" }, | |
348 | { 0xF6, "devices not in a common zone" }, | |
349 | }; | |
350 | ||
351 | /** | |
352 | * ibmvfc_get_ls_explain - Return the FC Explain description text | |
353 | * @status: FC Explain status | |
354 | * | |
355 | * Returns: | |
356 | * error string | |
357 | **/ | |
358 | static const char *ibmvfc_get_ls_explain(u16 status) | |
359 | { | |
360 | int i; | |
361 | ||
362 | for (i = 0; i < ARRAY_SIZE(ls_explain); i++) | |
363 | if (ls_explain[i].fc_explain == status) | |
364 | return ls_explain[i].name; | |
365 | ||
366 | return unknown_fc_explain; | |
367 | } | |
368 | ||
369 | /** | |
370 | * ibmvfc_get_gs_explain - Return the FC Explain description text | |
371 | * @status: FC Explain status | |
372 | * | |
373 | * Returns: | |
374 | * error string | |
375 | **/ | |
376 | static const char *ibmvfc_get_gs_explain(u16 status) | |
377 | { | |
378 | int i; | |
379 | ||
380 | for (i = 0; i < ARRAY_SIZE(gs_explain); i++) | |
381 | if (gs_explain[i].fc_explain == status) | |
382 | return gs_explain[i].name; | |
383 | ||
384 | return unknown_fc_explain; | |
385 | } | |
386 | ||
387 | static const struct { | |
388 | enum ibmvfc_fc_type fc_type; | |
389 | char *name; | |
390 | } fc_type [] = { | |
391 | { IBMVFC_FABRIC_REJECT, "fabric reject" }, | |
392 | { IBMVFC_PORT_REJECT, "port reject" }, | |
393 | { IBMVFC_LS_REJECT, "ELS reject" }, | |
394 | { IBMVFC_FABRIC_BUSY, "fabric busy" }, | |
395 | { IBMVFC_PORT_BUSY, "port busy" }, | |
396 | { IBMVFC_BASIC_REJECT, "basic reject" }, | |
397 | }; | |
398 | ||
399 | static const char *unknown_fc_type = "unknown fc type"; | |
400 | ||
401 | /** | |
402 | * ibmvfc_get_fc_type - Return the FC Type description text | |
403 | * @status: FC Type error status | |
404 | * | |
405 | * Returns: | |
406 | * error string | |
407 | **/ | |
408 | static const char *ibmvfc_get_fc_type(u16 status) | |
409 | { | |
410 | int i; | |
411 | ||
412 | for (i = 0; i < ARRAY_SIZE(fc_type); i++) | |
413 | if (fc_type[i].fc_type == status) | |
414 | return fc_type[i].name; | |
415 | ||
416 | return unknown_fc_type; | |
417 | } | |
418 | ||
419 | /** | |
420 | * ibmvfc_set_tgt_action - Set the next init action for the target | |
421 | * @tgt: ibmvfc target struct | |
422 | * @action: action to perform | |
423 | * | |
424 | **/ | |
425 | static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, | |
426 | enum ibmvfc_target_action action) | |
427 | { | |
428 | switch (tgt->action) { | |
429 | case IBMVFC_TGT_ACTION_DEL_RPORT: | |
d5da3040 BK |
430 | if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) |
431 | tgt->action = action; | |
432 | case IBMVFC_TGT_ACTION_DELETED_RPORT: | |
072b91f9 BK |
433 | break; |
434 | default: | |
43c8da90 BK |
435 | if (action == IBMVFC_TGT_ACTION_DEL_RPORT) |
436 | tgt->add_rport = 0; | |
072b91f9 BK |
437 | tgt->action = action; |
438 | break; | |
439 | } | |
440 | } | |
441 | ||
442 | /** | |
443 | * ibmvfc_set_host_state - Set the state for the host | |
444 | * @vhost: ibmvfc host struct | |
445 | * @state: state to set host to | |
446 | * | |
447 | * Returns: | |
448 | * 0 if state changed / non-zero if not changed | |
449 | **/ | |
450 | static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, | |
451 | enum ibmvfc_host_state state) | |
452 | { | |
453 | int rc = 0; | |
454 | ||
455 | switch (vhost->state) { | |
456 | case IBMVFC_HOST_OFFLINE: | |
457 | rc = -EINVAL; | |
458 | break; | |
459 | default: | |
460 | vhost->state = state; | |
461 | break; | |
462 | }; | |
463 | ||
464 | return rc; | |
465 | } | |
466 | ||
467 | /** | |
468 | * ibmvfc_set_host_action - Set the next init action for the host | |
469 | * @vhost: ibmvfc host struct | |
470 | * @action: action to perform | |
471 | * | |
472 | **/ | |
473 | static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, | |
474 | enum ibmvfc_host_action action) | |
475 | { | |
476 | switch (action) { | |
477 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: | |
478 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) | |
479 | vhost->action = action; | |
480 | break; | |
79111d08 BK |
481 | case IBMVFC_HOST_ACTION_LOGO_WAIT: |
482 | if (vhost->action == IBMVFC_HOST_ACTION_LOGO) | |
483 | vhost->action = action; | |
484 | break; | |
072b91f9 BK |
485 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
486 | if (vhost->action == IBMVFC_HOST_ACTION_INIT) | |
487 | vhost->action = action; | |
488 | break; | |
489 | case IBMVFC_HOST_ACTION_QUERY: | |
490 | switch (vhost->action) { | |
491 | case IBMVFC_HOST_ACTION_INIT_WAIT: | |
492 | case IBMVFC_HOST_ACTION_NONE: | |
43c8da90 | 493 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 BK |
494 | vhost->action = action; |
495 | break; | |
496 | default: | |
497 | break; | |
498 | }; | |
499 | break; | |
500 | case IBMVFC_HOST_ACTION_TGT_INIT: | |
501 | if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) | |
502 | vhost->action = action; | |
503 | break; | |
504 | case IBMVFC_HOST_ACTION_INIT: | |
505 | case IBMVFC_HOST_ACTION_TGT_DEL: | |
73ee5d86 BK |
506 | switch (vhost->action) { |
507 | case IBMVFC_HOST_ACTION_RESET: | |
508 | case IBMVFC_HOST_ACTION_REENABLE: | |
509 | break; | |
510 | default: | |
511 | vhost->action = action; | |
512 | break; | |
513 | }; | |
514 | break; | |
515 | case IBMVFC_HOST_ACTION_LOGO: | |
072b91f9 | 516 | case IBMVFC_HOST_ACTION_QUERY_TGTS: |
10e79499 | 517 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
072b91f9 | 518 | case IBMVFC_HOST_ACTION_NONE: |
73ee5d86 BK |
519 | case IBMVFC_HOST_ACTION_RESET: |
520 | case IBMVFC_HOST_ACTION_REENABLE: | |
072b91f9 BK |
521 | default: |
522 | vhost->action = action; | |
523 | break; | |
524 | }; | |
525 | } | |
526 | ||
527 | /** | |
528 | * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) | |
529 | * @vhost: ibmvfc host struct | |
530 | * | |
531 | * Return value: | |
532 | * nothing | |
533 | **/ | |
534 | static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) | |
535 | { | |
536 | if (vhost->action == IBMVFC_HOST_ACTION_NONE) { | |
2d0da2a4 BK |
537 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
538 | scsi_block_requests(vhost->host); | |
539 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); | |
540 | } | |
072b91f9 BK |
541 | } else |
542 | vhost->reinit = 1; | |
543 | ||
544 | wake_up(&vhost->work_wait_q); | |
545 | } | |
546 | ||
547 | /** | |
548 | * ibmvfc_link_down - Handle a link down event from the adapter | |
549 | * @vhost: ibmvfc host struct | |
550 | * @state: ibmvfc host state to enter | |
551 | * | |
552 | **/ | |
553 | static void ibmvfc_link_down(struct ibmvfc_host *vhost, | |
554 | enum ibmvfc_host_state state) | |
555 | { | |
556 | struct ibmvfc_target *tgt; | |
557 | ||
558 | ENTER; | |
559 | scsi_block_requests(vhost->host); | |
560 | list_for_each_entry(tgt, &vhost->targets, queue) | |
561 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
562 | ibmvfc_set_host_state(vhost, state); | |
563 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); | |
564 | vhost->events_to_log |= IBMVFC_AE_LINKDOWN; | |
565 | wake_up(&vhost->work_wait_q); | |
566 | LEAVE; | |
567 | } | |
568 | ||
569 | /** | |
570 | * ibmvfc_init_host - Start host initialization | |
571 | * @vhost: ibmvfc host struct | |
572 | * | |
573 | * Return value: | |
574 | * nothing | |
575 | **/ | |
861890c6 | 576 | static void ibmvfc_init_host(struct ibmvfc_host *vhost) |
072b91f9 BK |
577 | { |
578 | struct ibmvfc_target *tgt; | |
579 | ||
580 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { | |
1c41fa82 | 581 | if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { |
072b91f9 BK |
582 | dev_err(vhost->dev, |
583 | "Host initialization retries exceeded. Taking adapter offline\n"); | |
584 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); | |
585 | return; | |
586 | } | |
587 | } | |
588 | ||
589 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { | |
861890c6 BK |
590 | memset(vhost->async_crq.msgs, 0, PAGE_SIZE); |
591 | vhost->async_crq.cur = 0; | |
cf6f10d7 | 592 | |
072b91f9 | 593 | list_for_each_entry(tgt, &vhost->targets, queue) |
5e47167b | 594 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
072b91f9 BK |
595 | scsi_block_requests(vhost->host); |
596 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); | |
597 | vhost->job_step = ibmvfc_npiv_login; | |
598 | wake_up(&vhost->work_wait_q); | |
599 | } | |
600 | } | |
601 | ||
602 | /** | |
603 | * ibmvfc_send_crq - Send a CRQ | |
604 | * @vhost: ibmvfc host struct | |
605 | * @word1: the first 64 bits of the data | |
606 | * @word2: the second 64 bits of the data | |
607 | * | |
608 | * Return value: | |
609 | * 0 on success / other on failure | |
610 | **/ | |
611 | static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) | |
612 | { | |
613 | struct vio_dev *vdev = to_vio_dev(vhost->dev); | |
614 | return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); | |
615 | } | |
616 | ||
617 | /** | |
618 | * ibmvfc_send_crq_init - Send a CRQ init message | |
619 | * @vhost: ibmvfc host struct | |
620 | * | |
621 | * Return value: | |
622 | * 0 on success / other on failure | |
623 | **/ | |
624 | static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) | |
625 | { | |
626 | ibmvfc_dbg(vhost, "Sending CRQ init\n"); | |
627 | return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); | |
628 | } | |
629 | ||
630 | /** | |
631 | * ibmvfc_send_crq_init_complete - Send a CRQ init complete message | |
632 | * @vhost: ibmvfc host struct | |
633 | * | |
634 | * Return value: | |
635 | * 0 on success / other on failure | |
636 | **/ | |
637 | static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) | |
638 | { | |
639 | ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); | |
640 | return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); | |
641 | } | |
642 | ||
643 | /** | |
644 | * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ | |
645 | * @vhost: ibmvfc host struct | |
646 | * | |
647 | * Frees irq, deallocates a page for messages, unmaps dma, and unregisters | |
648 | * the crq with the hypervisor. | |
649 | **/ | |
650 | static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) | |
651 | { | |
73ee5d86 | 652 | long rc = 0; |
072b91f9 BK |
653 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
654 | struct ibmvfc_crq_queue *crq = &vhost->crq; | |
655 | ||
656 | ibmvfc_dbg(vhost, "Releasing CRQ\n"); | |
657 | free_irq(vdev->irq, vhost); | |
039a0898 | 658 | tasklet_kill(&vhost->tasklet); |
072b91f9 | 659 | do { |
73ee5d86 BK |
660 | if (rc) |
661 | msleep(100); | |
072b91f9 BK |
662 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
663 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
664 | ||
665 | vhost->state = IBMVFC_NO_CRQ; | |
79111d08 | 666 | vhost->logged_in = 0; |
072b91f9 BK |
667 | dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); |
668 | free_page((unsigned long)crq->msgs); | |
669 | } | |
670 | ||
671 | /** | |
672 | * ibmvfc_reenable_crq_queue - reenables the CRQ | |
673 | * @vhost: ibmvfc host struct | |
674 | * | |
675 | * Return value: | |
676 | * 0 on success / other on failure | |
677 | **/ | |
678 | static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) | |
679 | { | |
73ee5d86 | 680 | int rc = 0; |
072b91f9 BK |
681 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
682 | ||
683 | /* Re-enable the CRQ */ | |
684 | do { | |
73ee5d86 BK |
685 | if (rc) |
686 | msleep(100); | |
072b91f9 BK |
687 | rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); |
688 | } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
689 | ||
690 | if (rc) | |
691 | dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); | |
692 | ||
693 | return rc; | |
694 | } | |
695 | ||
696 | /** | |
697 | * ibmvfc_reset_crq - resets a crq after a failure | |
698 | * @vhost: ibmvfc host struct | |
699 | * | |
700 | * Return value: | |
701 | * 0 on success / other on failure | |
702 | **/ | |
703 | static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) | |
704 | { | |
73ee5d86 BK |
705 | int rc = 0; |
706 | unsigned long flags; | |
072b91f9 BK |
707 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
708 | struct ibmvfc_crq_queue *crq = &vhost->crq; | |
709 | ||
710 | /* Close the CRQ */ | |
711 | do { | |
73ee5d86 BK |
712 | if (rc) |
713 | msleep(100); | |
072b91f9 BK |
714 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
715 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); | |
716 | ||
73ee5d86 | 717 | spin_lock_irqsave(vhost->host->host_lock, flags); |
072b91f9 | 718 | vhost->state = IBMVFC_NO_CRQ; |
79111d08 | 719 | vhost->logged_in = 0; |
072b91f9 BK |
720 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
721 | ||
722 | /* Clean out the queue */ | |
723 | memset(crq->msgs, 0, PAGE_SIZE); | |
724 | crq->cur = 0; | |
725 | ||
726 | /* And re-open it again */ | |
727 | rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, | |
728 | crq->msg_token, PAGE_SIZE); | |
729 | ||
730 | if (rc == H_CLOSED) | |
731 | /* Adapter is good, but other end is not ready */ | |
732 | dev_warn(vhost->dev, "Partner adapter not ready\n"); | |
733 | else if (rc != 0) | |
734 | dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); | |
73ee5d86 | 735 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
072b91f9 BK |
736 | |
737 | return rc; | |
738 | } | |
739 | ||
740 | /** | |
741 | * ibmvfc_valid_event - Determines if event is valid. | |
742 | * @pool: event_pool that contains the event | |
743 | * @evt: ibmvfc event to be checked for validity | |
744 | * | |
745 | * Return value: | |
746 | * 1 if event is valid / 0 if event is not valid | |
747 | **/ | |
748 | static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, | |
749 | struct ibmvfc_event *evt) | |
750 | { | |
751 | int index = evt - pool->events; | |
752 | if (index < 0 || index >= pool->size) /* outside of bounds */ | |
753 | return 0; | |
754 | if (evt != pool->events + index) /* unaligned */ | |
755 | return 0; | |
756 | return 1; | |
757 | } | |
758 | ||
759 | /** | |
760 | * ibmvfc_free_event - Free the specified event | |
761 | * @evt: ibmvfc_event to be freed | |
762 | * | |
763 | **/ | |
764 | static void ibmvfc_free_event(struct ibmvfc_event *evt) | |
765 | { | |
766 | struct ibmvfc_host *vhost = evt->vhost; | |
767 | struct ibmvfc_event_pool *pool = &vhost->pool; | |
768 | ||
769 | BUG_ON(!ibmvfc_valid_event(pool, evt)); | |
770 | BUG_ON(atomic_inc_return(&evt->free) != 1); | |
771 | list_add_tail(&evt->queue, &vhost->free); | |
772 | } | |
773 | ||
774 | /** | |
775 | * ibmvfc_scsi_eh_done - EH done function for queuecommand commands | |
776 | * @evt: ibmvfc event struct | |
777 | * | |
778 | * This function does not setup any error status, that must be done | |
779 | * before this function gets called. | |
780 | **/ | |
781 | static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) | |
782 | { | |
783 | struct scsi_cmnd *cmnd = evt->cmnd; | |
784 | ||
785 | if (cmnd) { | |
786 | scsi_dma_unmap(cmnd); | |
787 | cmnd->scsi_done(cmnd); | |
788 | } | |
789 | ||
ad8dcffa BK |
790 | if (evt->eh_comp) |
791 | complete(evt->eh_comp); | |
792 | ||
072b91f9 BK |
793 | ibmvfc_free_event(evt); |
794 | } | |
795 | ||
796 | /** | |
797 | * ibmvfc_fail_request - Fail request with specified error code | |
798 | * @evt: ibmvfc event struct | |
799 | * @error_code: error code to fail request with | |
800 | * | |
801 | * Return value: | |
802 | * none | |
803 | **/ | |
804 | static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) | |
805 | { | |
806 | if (evt->cmnd) { | |
807 | evt->cmnd->result = (error_code << 16); | |
808 | evt->done = ibmvfc_scsi_eh_done; | |
809 | } else | |
0aab6c3f | 810 | evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED); |
072b91f9 BK |
811 | |
812 | list_del(&evt->queue); | |
813 | del_timer(&evt->timer); | |
814 | ibmvfc_trc_end(evt); | |
815 | evt->done(evt); | |
816 | } | |
817 | ||
818 | /** | |
819 | * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests | |
820 | * @vhost: ibmvfc host struct | |
821 | * @error_code: error code to fail requests with | |
822 | * | |
823 | * Return value: | |
824 | * none | |
825 | **/ | |
826 | static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) | |
827 | { | |
828 | struct ibmvfc_event *evt, *pos; | |
829 | ||
830 | ibmvfc_dbg(vhost, "Purging all requests\n"); | |
831 | list_for_each_entry_safe(evt, pos, &vhost->sent, queue) | |
832 | ibmvfc_fail_request(evt, error_code); | |
833 | } | |
834 | ||
835 | /** | |
79111d08 | 836 | * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ |
072b91f9 BK |
837 | * @vhost: struct ibmvfc host to reset |
838 | **/ | |
79111d08 | 839 | static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) |
072b91f9 | 840 | { |
072b91f9 | 841 | ibmvfc_purge_requests(vhost, DID_ERROR); |
73ee5d86 BK |
842 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
843 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); | |
072b91f9 BK |
844 | } |
845 | ||
846 | /** | |
79111d08 | 847 | * __ibmvfc_reset_host - Reset the connection to the server (no locking) |
072b91f9 BK |
848 | * @vhost: struct ibmvfc host to reset |
849 | **/ | |
79111d08 BK |
850 | static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) |
851 | { | |
852 | if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && | |
853 | !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { | |
854 | scsi_block_requests(vhost->host); | |
855 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); | |
856 | vhost->job_step = ibmvfc_npiv_logout; | |
857 | wake_up(&vhost->work_wait_q); | |
858 | } else | |
859 | ibmvfc_hard_reset_host(vhost); | |
860 | } | |
861 | ||
862 | /** | |
863 | * ibmvfc_reset_host - Reset the connection to the server | |
864 | * @vhost: ibmvfc host struct | |
865 | **/ | |
072b91f9 BK |
866 | static void ibmvfc_reset_host(struct ibmvfc_host *vhost) |
867 | { | |
868 | unsigned long flags; | |
869 | ||
870 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
871 | __ibmvfc_reset_host(vhost); | |
872 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
873 | } | |
874 | ||
875 | /** | |
876 | * ibmvfc_retry_host_init - Retry host initialization if allowed | |
877 | * @vhost: ibmvfc host struct | |
878 | * | |
7d0e4622 BK |
879 | * Returns: 1 if init will be retried / 0 if not |
880 | * | |
072b91f9 | 881 | **/ |
7d0e4622 | 882 | static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) |
072b91f9 | 883 | { |
7d0e4622 BK |
884 | int retry = 0; |
885 | ||
072b91f9 | 886 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { |
1c41fa82 BK |
887 | vhost->delay_init = 1; |
888 | if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { | |
072b91f9 BK |
889 | dev_err(vhost->dev, |
890 | "Host initialization retries exceeded. Taking adapter offline\n"); | |
891 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); | |
1c41fa82 | 892 | } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) |
072b91f9 | 893 | __ibmvfc_reset_host(vhost); |
7d0e4622 | 894 | else { |
072b91f9 | 895 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
7d0e4622 BK |
896 | retry = 1; |
897 | } | |
072b91f9 BK |
898 | } |
899 | ||
900 | wake_up(&vhost->work_wait_q); | |
7d0e4622 | 901 | return retry; |
072b91f9 BK |
902 | } |
903 | ||
904 | /** | |
b3c10489 | 905 | * __ibmvfc_get_target - Find the specified scsi_target (no locking) |
072b91f9 BK |
906 | * @starget: scsi target struct |
907 | * | |
908 | * Return value: | |
909 | * ibmvfc_target struct / NULL if not found | |
910 | **/ | |
b3c10489 | 911 | static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) |
072b91f9 BK |
912 | { |
913 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
914 | struct ibmvfc_host *vhost = shost_priv(shost); | |
915 | struct ibmvfc_target *tgt; | |
916 | ||
917 | list_for_each_entry(tgt, &vhost->targets, queue) | |
b3c10489 BK |
918 | if (tgt->target_id == starget->id) { |
919 | kref_get(&tgt->kref); | |
072b91f9 | 920 | return tgt; |
b3c10489 | 921 | } |
072b91f9 BK |
922 | return NULL; |
923 | } | |
924 | ||
925 | /** | |
b3c10489 | 926 | * ibmvfc_get_target - Find the specified scsi_target |
072b91f9 BK |
927 | * @starget: scsi target struct |
928 | * | |
929 | * Return value: | |
930 | * ibmvfc_target struct / NULL if not found | |
931 | **/ | |
b3c10489 | 932 | static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) |
072b91f9 BK |
933 | { |
934 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
935 | struct ibmvfc_target *tgt; | |
936 | unsigned long flags; | |
937 | ||
938 | spin_lock_irqsave(shost->host_lock, flags); | |
b3c10489 | 939 | tgt = __ibmvfc_get_target(starget); |
072b91f9 BK |
940 | spin_unlock_irqrestore(shost->host_lock, flags); |
941 | return tgt; | |
942 | } | |
943 | ||
944 | /** | |
945 | * ibmvfc_get_host_speed - Get host port speed | |
946 | * @shost: scsi host struct | |
947 | * | |
948 | * Return value: | |
949 | * none | |
950 | **/ | |
951 | static void ibmvfc_get_host_speed(struct Scsi_Host *shost) | |
952 | { | |
953 | struct ibmvfc_host *vhost = shost_priv(shost); | |
954 | unsigned long flags; | |
955 | ||
956 | spin_lock_irqsave(shost->host_lock, flags); | |
957 | if (vhost->state == IBMVFC_ACTIVE) { | |
0aab6c3f | 958 | switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) { |
072b91f9 BK |
959 | case 1: |
960 | fc_host_speed(shost) = FC_PORTSPEED_1GBIT; | |
961 | break; | |
962 | case 2: | |
963 | fc_host_speed(shost) = FC_PORTSPEED_2GBIT; | |
964 | break; | |
965 | case 4: | |
966 | fc_host_speed(shost) = FC_PORTSPEED_4GBIT; | |
967 | break; | |
968 | case 8: | |
969 | fc_host_speed(shost) = FC_PORTSPEED_8GBIT; | |
970 | break; | |
971 | case 10: | |
972 | fc_host_speed(shost) = FC_PORTSPEED_10GBIT; | |
973 | break; | |
974 | case 16: | |
975 | fc_host_speed(shost) = FC_PORTSPEED_16GBIT; | |
976 | break; | |
977 | default: | |
775a42ec | 978 | ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", |
0aab6c3f | 979 | be64_to_cpu(vhost->login_buf->resp.link_speed) / 100); |
072b91f9 BK |
980 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; |
981 | break; | |
982 | } | |
983 | } else | |
984 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; | |
985 | spin_unlock_irqrestore(shost->host_lock, flags); | |
986 | } | |
987 | ||
988 | /** | |
989 | * ibmvfc_get_host_port_state - Get host port state | |
990 | * @shost: scsi host struct | |
991 | * | |
992 | * Return value: | |
993 | * none | |
994 | **/ | |
995 | static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) | |
996 | { | |
997 | struct ibmvfc_host *vhost = shost_priv(shost); | |
998 | unsigned long flags; | |
999 | ||
1000 | spin_lock_irqsave(shost->host_lock, flags); | |
1001 | switch (vhost->state) { | |
1002 | case IBMVFC_INITIALIZING: | |
1003 | case IBMVFC_ACTIVE: | |
1004 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; | |
1005 | break; | |
1006 | case IBMVFC_LINK_DOWN: | |
1007 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; | |
1008 | break; | |
1009 | case IBMVFC_LINK_DEAD: | |
1010 | case IBMVFC_HOST_OFFLINE: | |
1011 | fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; | |
1012 | break; | |
1013 | case IBMVFC_HALTED: | |
1014 | fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; | |
1015 | break; | |
0ae808e0 BK |
1016 | case IBMVFC_NO_CRQ: |
1017 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
1018 | break; | |
072b91f9 BK |
1019 | default: |
1020 | ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); | |
1021 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
1022 | break; | |
1023 | } | |
1024 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1025 | } | |
1026 | ||
1027 | /** | |
1028 | * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout | |
1029 | * @rport: rport struct | |
1030 | * @timeout: timeout value | |
1031 | * | |
1032 | * Return value: | |
1033 | * none | |
1034 | **/ | |
1035 | static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) | |
1036 | { | |
1037 | if (timeout) | |
1038 | rport->dev_loss_tmo = timeout; | |
1039 | else | |
1040 | rport->dev_loss_tmo = 1; | |
1041 | } | |
1042 | ||
b3c10489 BK |
1043 | /** |
1044 | * ibmvfc_release_tgt - Free memory allocated for a target | |
1045 | * @kref: kref struct | |
1046 | * | |
1047 | **/ | |
1048 | static void ibmvfc_release_tgt(struct kref *kref) | |
1049 | { | |
1050 | struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); | |
1051 | kfree(tgt); | |
1052 | } | |
1053 | ||
072b91f9 BK |
1054 | /** |
1055 | * ibmvfc_get_starget_node_name - Get SCSI target's node name | |
1056 | * @starget: scsi target struct | |
1057 | * | |
1058 | * Return value: | |
1059 | * none | |
1060 | **/ | |
1061 | static void ibmvfc_get_starget_node_name(struct scsi_target *starget) | |
1062 | { | |
b3c10489 | 1063 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1064 | fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; |
b3c10489 BK |
1065 | if (tgt) |
1066 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1067 | } |
1068 | ||
1069 | /** | |
1070 | * ibmvfc_get_starget_port_name - Get SCSI target's port name | |
1071 | * @starget: scsi target struct | |
1072 | * | |
1073 | * Return value: | |
1074 | * none | |
1075 | **/ | |
1076 | static void ibmvfc_get_starget_port_name(struct scsi_target *starget) | |
1077 | { | |
b3c10489 | 1078 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1079 | fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; |
b3c10489 BK |
1080 | if (tgt) |
1081 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1082 | } |
1083 | ||
1084 | /** | |
1085 | * ibmvfc_get_starget_port_id - Get SCSI target's port ID | |
1086 | * @starget: scsi target struct | |
1087 | * | |
1088 | * Return value: | |
1089 | * none | |
1090 | **/ | |
1091 | static void ibmvfc_get_starget_port_id(struct scsi_target *starget) | |
1092 | { | |
b3c10489 | 1093 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
072b91f9 | 1094 | fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; |
b3c10489 BK |
1095 | if (tgt) |
1096 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
072b91f9 BK |
1097 | } |
1098 | ||
1099 | /** | |
1100 | * ibmvfc_wait_while_resetting - Wait while the host resets | |
1101 | * @vhost: ibmvfc host struct | |
1102 | * | |
1103 | * Return value: | |
1104 | * 0 on success / other on failure | |
1105 | **/ | |
1106 | static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) | |
1107 | { | |
1108 | long timeout = wait_event_timeout(vhost->init_wait_q, | |
3eddc569 BK |
1109 | ((vhost->state == IBMVFC_ACTIVE || |
1110 | vhost->state == IBMVFC_HOST_OFFLINE || | |
1111 | vhost->state == IBMVFC_LINK_DEAD) && | |
1112 | vhost->action == IBMVFC_HOST_ACTION_NONE), | |
072b91f9 BK |
1113 | (init_timeout * HZ)); |
1114 | ||
1115 | return timeout ? 0 : -EIO; | |
1116 | } | |
1117 | ||
1118 | /** | |
1119 | * ibmvfc_issue_fc_host_lip - Re-initiate link initialization | |
1120 | * @shost: scsi host struct | |
1121 | * | |
1122 | * Return value: | |
1123 | * 0 on success / other on failure | |
1124 | **/ | |
1125 | static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) | |
1126 | { | |
1127 | struct ibmvfc_host *vhost = shost_priv(shost); | |
1128 | ||
1129 | dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); | |
1130 | ibmvfc_reset_host(vhost); | |
1131 | return ibmvfc_wait_while_resetting(vhost); | |
1132 | } | |
1133 | ||
1134 | /** | |
1135 | * ibmvfc_gather_partition_info - Gather info about the LPAR | |
1136 | * | |
1137 | * Return value: | |
1138 | * none | |
1139 | **/ | |
1140 | static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) | |
1141 | { | |
1142 | struct device_node *rootdn; | |
1143 | const char *name; | |
1144 | const unsigned int *num; | |
1145 | ||
1146 | rootdn = of_find_node_by_path("/"); | |
1147 | if (!rootdn) | |
1148 | return; | |
1149 | ||
1150 | name = of_get_property(rootdn, "ibm,partition-name", NULL); | |
1151 | if (name) | |
1152 | strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); | |
1153 | num = of_get_property(rootdn, "ibm,partition-no", NULL); | |
1154 | if (num) | |
1155 | vhost->partition_number = *num; | |
1156 | of_node_put(rootdn); | |
1157 | } | |
1158 | ||
1159 | /** | |
1160 | * ibmvfc_set_login_info - Setup info for NPIV login | |
1161 | * @vhost: ibmvfc host struct | |
1162 | * | |
1163 | * Return value: | |
1164 | * none | |
1165 | **/ | |
1166 | static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) | |
1167 | { | |
1168 | struct ibmvfc_npiv_login *login_info = &vhost->login_info; | |
61c7a080 | 1169 | struct device_node *of_node = vhost->dev->of_node; |
072b91f9 BK |
1170 | const char *location; |
1171 | ||
1172 | memset(login_info, 0, sizeof(*login_info)); | |
1173 | ||
0aab6c3f TD |
1174 | login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX); |
1175 | login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); | |
1176 | login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); | |
1177 | login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); | |
1178 | login_info->partition_num = cpu_to_be32(vhost->partition_number); | |
1179 | login_info->vfc_frame_version = cpu_to_be32(1); | |
1180 | login_info->fcp_version = cpu_to_be16(3); | |
1181 | login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); | |
072b91f9 | 1182 | if (vhost->client_migrated) |
0aab6c3f | 1183 | login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); |
072b91f9 | 1184 | |
0aab6c3f TD |
1185 | login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ); |
1186 | login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE); | |
1187 | login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); | |
1188 | login_info->async.len = cpu_to_be32(vhost->async_crq.size * sizeof(*vhost->async_crq.msgs)); | |
072b91f9 BK |
1189 | strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); |
1190 | strncpy(login_info->device_name, | |
71610f55 | 1191 | dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); |
072b91f9 BK |
1192 | |
1193 | location = of_get_property(of_node, "ibm,loc-code", NULL); | |
71610f55 | 1194 | location = location ? location : dev_name(vhost->dev); |
072b91f9 BK |
1195 | strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); |
1196 | } | |
1197 | ||
1198 | /** | |
1199 | * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host | |
1200 | * @vhost: ibmvfc host who owns the event pool | |
1201 | * | |
1202 | * Returns zero on success. | |
1203 | **/ | |
1204 | static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) | |
1205 | { | |
1206 | int i; | |
1207 | struct ibmvfc_event_pool *pool = &vhost->pool; | |
1208 | ||
1209 | ENTER; | |
1210 | pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; | |
1211 | pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); | |
1212 | if (!pool->events) | |
1213 | return -ENOMEM; | |
1214 | ||
1215 | pool->iu_storage = dma_alloc_coherent(vhost->dev, | |
1216 | pool->size * sizeof(*pool->iu_storage), | |
1217 | &pool->iu_token, 0); | |
1218 | ||
1219 | if (!pool->iu_storage) { | |
1220 | kfree(pool->events); | |
1221 | return -ENOMEM; | |
1222 | } | |
1223 | ||
1224 | for (i = 0; i < pool->size; ++i) { | |
1225 | struct ibmvfc_event *evt = &pool->events[i]; | |
1226 | atomic_set(&evt->free, 1); | |
1227 | evt->crq.valid = 0x80; | |
0aab6c3f | 1228 | evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i)); |
072b91f9 BK |
1229 | evt->xfer_iu = pool->iu_storage + i; |
1230 | evt->vhost = vhost; | |
1231 | evt->ext_list = NULL; | |
1232 | list_add_tail(&evt->queue, &vhost->free); | |
1233 | } | |
1234 | ||
1235 | LEAVE; | |
1236 | return 0; | |
1237 | } | |
1238 | ||
1239 | /** | |
1240 | * ibmvfc_free_event_pool - Frees memory of the event pool of a host | |
1241 | * @vhost: ibmvfc host who owns the event pool | |
1242 | * | |
1243 | **/ | |
1244 | static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) | |
1245 | { | |
1246 | int i; | |
1247 | struct ibmvfc_event_pool *pool = &vhost->pool; | |
1248 | ||
1249 | ENTER; | |
1250 | for (i = 0; i < pool->size; ++i) { | |
1251 | list_del(&pool->events[i].queue); | |
1252 | BUG_ON(atomic_read(&pool->events[i].free) != 1); | |
1253 | if (pool->events[i].ext_list) | |
1254 | dma_pool_free(vhost->sg_pool, | |
1255 | pool->events[i].ext_list, | |
1256 | pool->events[i].ext_list_token); | |
1257 | } | |
1258 | ||
1259 | kfree(pool->events); | |
1260 | dma_free_coherent(vhost->dev, | |
1261 | pool->size * sizeof(*pool->iu_storage), | |
1262 | pool->iu_storage, pool->iu_token); | |
1263 | LEAVE; | |
1264 | } | |
1265 | ||
1266 | /** | |
1267 | * ibmvfc_get_event - Gets the next free event in pool | |
1268 | * @vhost: ibmvfc host struct | |
1269 | * | |
1270 | * Returns a free event from the pool. | |
1271 | **/ | |
1272 | static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) | |
1273 | { | |
1274 | struct ibmvfc_event *evt; | |
1275 | ||
1276 | BUG_ON(list_empty(&vhost->free)); | |
1277 | evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); | |
1278 | atomic_set(&evt->free, 0); | |
1279 | list_del(&evt->queue); | |
1280 | return evt; | |
1281 | } | |
1282 | ||
1283 | /** | |
1284 | * ibmvfc_init_event - Initialize fields in an event struct that are always | |
1285 | * required. | |
1286 | * @evt: The event | |
1287 | * @done: Routine to call when the event is responded to | |
1288 | * @format: SRP or MAD format | |
1289 | **/ | |
1290 | static void ibmvfc_init_event(struct ibmvfc_event *evt, | |
1291 | void (*done) (struct ibmvfc_event *), u8 format) | |
1292 | { | |
1293 | evt->cmnd = NULL; | |
1294 | evt->sync_iu = NULL; | |
1295 | evt->crq.format = format; | |
1296 | evt->done = done; | |
ad8dcffa | 1297 | evt->eh_comp = NULL; |
072b91f9 BK |
1298 | } |
1299 | ||
1300 | /** | |
1301 | * ibmvfc_map_sg_list - Initialize scatterlist | |
1302 | * @scmd: scsi command struct | |
1303 | * @nseg: number of scatterlist segments | |
1304 | * @md: memory descriptor list to initialize | |
1305 | **/ | |
1306 | static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, | |
1307 | struct srp_direct_buf *md) | |
1308 | { | |
1309 | int i; | |
1310 | struct scatterlist *sg; | |
1311 | ||
1312 | scsi_for_each_sg(scmd, sg, nseg, i) { | |
0aab6c3f TD |
1313 | md[i].va = cpu_to_be64(sg_dma_address(sg)); |
1314 | md[i].len = cpu_to_be32(sg_dma_len(sg)); | |
072b91f9 BK |
1315 | md[i].key = 0; |
1316 | } | |
1317 | } | |
1318 | ||
1319 | /** | |
1320 | * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields | |
1321 | * @scmd: Scsi_Cmnd with the scatterlist | |
1322 | * @evt: ibmvfc event struct | |
1323 | * @vfc_cmd: vfc_cmd that contains the memory descriptor | |
1324 | * @dev: device for which to map dma memory | |
1325 | * | |
1326 | * Returns: | |
1327 | * 0 on success / non-zero on failure | |
1328 | **/ | |
1329 | static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, | |
1330 | struct ibmvfc_event *evt, | |
1331 | struct ibmvfc_cmd *vfc_cmd, struct device *dev) | |
1332 | { | |
1333 | ||
1334 | int sg_mapped; | |
1335 | struct srp_direct_buf *data = &vfc_cmd->ioba; | |
1336 | struct ibmvfc_host *vhost = dev_get_drvdata(dev); | |
1337 | ||
1338 | sg_mapped = scsi_dma_map(scmd); | |
1339 | if (!sg_mapped) { | |
0aab6c3f | 1340 | vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC); |
072b91f9 BK |
1341 | return 0; |
1342 | } else if (unlikely(sg_mapped < 0)) { | |
1343 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1344 | scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); | |
1345 | return sg_mapped; | |
1346 | } | |
1347 | ||
1348 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { | |
0aab6c3f | 1349 | vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE); |
072b91f9 BK |
1350 | vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; |
1351 | } else { | |
0aab6c3f | 1352 | vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ); |
072b91f9 BK |
1353 | vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; |
1354 | } | |
1355 | ||
1356 | if (sg_mapped == 1) { | |
1357 | ibmvfc_map_sg_list(scmd, sg_mapped, data); | |
1358 | return 0; | |
1359 | } | |
1360 | ||
0aab6c3f | 1361 | vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST); |
072b91f9 BK |
1362 | |
1363 | if (!evt->ext_list) { | |
1364 | evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, | |
1365 | &evt->ext_list_token); | |
1366 | ||
1367 | if (!evt->ext_list) { | |
64b840dd BK |
1368 | scsi_dma_unmap(scmd); |
1369 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1370 | scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); | |
072b91f9 BK |
1371 | return -ENOMEM; |
1372 | } | |
1373 | } | |
1374 | ||
1375 | ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); | |
1376 | ||
0aab6c3f TD |
1377 | data->va = cpu_to_be64(evt->ext_list_token); |
1378 | data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf)); | |
072b91f9 BK |
1379 | data->key = 0; |
1380 | return 0; | |
1381 | } | |
1382 | ||
1383 | /** | |
1384 | * ibmvfc_timeout - Internal command timeout handler | |
1385 | * @evt: struct ibmvfc_event that timed out | |
1386 | * | |
1387 | * Called when an internally generated command times out | |
1388 | **/ | |
1389 | static void ibmvfc_timeout(struct ibmvfc_event *evt) | |
1390 | { | |
1391 | struct ibmvfc_host *vhost = evt->vhost; | |
1392 | dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); | |
1393 | ibmvfc_reset_host(vhost); | |
1394 | } | |
1395 | ||
1396 | /** | |
1397 | * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() | |
1398 | * @evt: event to be sent | |
1399 | * @vhost: ibmvfc host struct | |
1400 | * @timeout: timeout in seconds - 0 means do not time command | |
1401 | * | |
1402 | * Returns the value returned from ibmvfc_send_crq(). (Zero for success) | |
1403 | **/ | |
1404 | static int ibmvfc_send_event(struct ibmvfc_event *evt, | |
1405 | struct ibmvfc_host *vhost, unsigned long timeout) | |
1406 | { | |
0aab6c3f | 1407 | __be64 *crq_as_u64 = (__be64 *) &evt->crq; |
072b91f9 BK |
1408 | int rc; |
1409 | ||
1410 | /* Copy the IU into the transfer area */ | |
1411 | *evt->xfer_iu = evt->iu; | |
1412 | if (evt->crq.format == IBMVFC_CMD_FORMAT) | |
0aab6c3f | 1413 | evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); |
072b91f9 | 1414 | else if (evt->crq.format == IBMVFC_MAD_FORMAT) |
0aab6c3f | 1415 | evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); |
072b91f9 BK |
1416 | else |
1417 | BUG(); | |
1418 | ||
1419 | list_add_tail(&evt->queue, &vhost->sent); | |
1420 | init_timer(&evt->timer); | |
1421 | ||
1422 | if (timeout) { | |
1423 | evt->timer.data = (unsigned long) evt; | |
1424 | evt->timer.expires = jiffies + (timeout * HZ); | |
1425 | evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; | |
1426 | add_timer(&evt->timer); | |
1427 | } | |
1428 | ||
a528ab7a BK |
1429 | mb(); |
1430 | ||
0aab6c3f TD |
1431 | if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), |
1432 | be64_to_cpu(crq_as_u64[1])))) { | |
072b91f9 BK |
1433 | list_del(&evt->queue); |
1434 | del_timer(&evt->timer); | |
1435 | ||
1436 | /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. | |
1437 | * Firmware will send a CRQ with a transport event (0xFF) to | |
1438 | * tell this client what has happened to the transport. This | |
1439 | * will be handled in ibmvfc_handle_crq() | |
1440 | */ | |
1441 | if (rc == H_CLOSED) { | |
1442 | if (printk_ratelimit()) | |
1443 | dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); | |
1444 | if (evt->cmnd) | |
1445 | scsi_dma_unmap(evt->cmnd); | |
1446 | ibmvfc_free_event(evt); | |
1447 | return SCSI_MLQUEUE_HOST_BUSY; | |
1448 | } | |
1449 | ||
1450 | dev_err(vhost->dev, "Send error (rc=%d)\n", rc); | |
1451 | if (evt->cmnd) { | |
1452 | evt->cmnd->result = DID_ERROR << 16; | |
1453 | evt->done = ibmvfc_scsi_eh_done; | |
1454 | } else | |
0aab6c3f | 1455 | evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); |
072b91f9 BK |
1456 | |
1457 | evt->done(evt); | |
1458 | } else | |
1459 | ibmvfc_trc_start(evt); | |
1460 | ||
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | /** | |
1465 | * ibmvfc_log_error - Log an error for the failed command if appropriate | |
1466 | * @evt: ibmvfc event to log | |
1467 | * | |
1468 | **/ | |
1469 | static void ibmvfc_log_error(struct ibmvfc_event *evt) | |
1470 | { | |
1471 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
1472 | struct ibmvfc_host *vhost = evt->vhost; | |
1473 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; | |
1474 | struct scsi_cmnd *cmnd = evt->cmnd; | |
1475 | const char *err = unknown_error; | |
0aab6c3f | 1476 | int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); |
072b91f9 BK |
1477 | int logerr = 0; |
1478 | int rsp_code = 0; | |
1479 | ||
1480 | if (index >= 0) { | |
1481 | logerr = cmd_status[index].log; | |
1482 | err = cmd_status[index].name; | |
1483 | } | |
1484 | ||
0ae808e0 | 1485 | if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) |
072b91f9 BK |
1486 | return; |
1487 | ||
1488 | if (rsp->flags & FCP_RSP_LEN_VALID) | |
1489 | rsp_code = rsp->data.info.rsp_code; | |
1490 | ||
1491 | scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " | |
1492 | "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", | |
1493 | cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, | |
1494 | rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); | |
1495 | } | |
1496 | ||
6d29cc56 BK |
1497 | /** |
1498 | * ibmvfc_relogin - Log back into the specified device | |
1499 | * @sdev: scsi device struct | |
1500 | * | |
1501 | **/ | |
1502 | static void ibmvfc_relogin(struct scsi_device *sdev) | |
1503 | { | |
1504 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
1505 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
1506 | struct ibmvfc_target *tgt; | |
1507 | ||
1508 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
1509 | if (rport == tgt->rport) { | |
1510 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
1511 | break; | |
1512 | } | |
1513 | } | |
1514 | ||
1515 | ibmvfc_reinit_host(vhost); | |
1516 | } | |
1517 | ||
072b91f9 BK |
1518 | /** |
1519 | * ibmvfc_scsi_done - Handle responses from commands | |
1520 | * @evt: ibmvfc event to be handled | |
1521 | * | |
1522 | * Used as a callback when sending scsi cmds. | |
1523 | **/ | |
1524 | static void ibmvfc_scsi_done(struct ibmvfc_event *evt) | |
1525 | { | |
1526 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; | |
1527 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; | |
1528 | struct scsi_cmnd *cmnd = evt->cmnd; | |
2bac406d | 1529 | u32 rsp_len = 0; |
0aab6c3f | 1530 | u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); |
072b91f9 BK |
1531 | |
1532 | if (cmnd) { | |
0aab6c3f TD |
1533 | if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) |
1534 | scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); | |
072b91f9 | 1535 | else if (rsp->flags & FCP_RESID_UNDER) |
0aab6c3f | 1536 | scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); |
072b91f9 BK |
1537 | else |
1538 | scsi_set_resid(cmnd, 0); | |
1539 | ||
1540 | if (vfc_cmd->status) { | |
1541 | cmnd->result = ibmvfc_get_err_result(vfc_cmd); | |
1542 | ||
1543 | if (rsp->flags & FCP_RSP_LEN_VALID) | |
0aab6c3f | 1544 | rsp_len = be32_to_cpu(rsp->fcp_rsp_len); |
072b91f9 BK |
1545 | if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) |
1546 | sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; | |
2bac406d | 1547 | if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) |
072b91f9 | 1548 | memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); |
0aab6c3f TD |
1549 | if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && |
1550 | (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) | |
6d29cc56 | 1551 | ibmvfc_relogin(cmnd->device); |
072b91f9 | 1552 | |
50119dad BK |
1553 | if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) |
1554 | cmnd->result = (DID_ERROR << 16); | |
1555 | ||
072b91f9 BK |
1556 | ibmvfc_log_error(evt); |
1557 | } | |
1558 | ||
1559 | if (!cmnd->result && | |
1560 | (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) | |
1561 | cmnd->result = (DID_ERROR << 16); | |
1562 | ||
1563 | scsi_dma_unmap(cmnd); | |
1564 | cmnd->scsi_done(cmnd); | |
1565 | } | |
1566 | ||
ad8dcffa BK |
1567 | if (evt->eh_comp) |
1568 | complete(evt->eh_comp); | |
1569 | ||
072b91f9 BK |
1570 | ibmvfc_free_event(evt); |
1571 | } | |
1572 | ||
1573 | /** | |
1574 | * ibmvfc_host_chkready - Check if the host can accept commands | |
1575 | * @vhost: struct ibmvfc host | |
1576 | * | |
1577 | * Returns: | |
1578 | * 1 if host can accept command / 0 if not | |
1579 | **/ | |
1580 | static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) | |
1581 | { | |
1582 | int result = 0; | |
1583 | ||
1584 | switch (vhost->state) { | |
1585 | case IBMVFC_LINK_DEAD: | |
1586 | case IBMVFC_HOST_OFFLINE: | |
1587 | result = DID_NO_CONNECT << 16; | |
1588 | break; | |
1589 | case IBMVFC_NO_CRQ: | |
1590 | case IBMVFC_INITIALIZING: | |
1591 | case IBMVFC_HALTED: | |
1592 | case IBMVFC_LINK_DOWN: | |
1593 | result = DID_REQUEUE << 16; | |
1594 | break; | |
1595 | case IBMVFC_ACTIVE: | |
1596 | result = 0; | |
1597 | break; | |
1598 | }; | |
1599 | ||
1600 | return result; | |
1601 | } | |
1602 | ||
1603 | /** | |
1604 | * ibmvfc_queuecommand - The queuecommand function of the scsi template | |
1605 | * @cmnd: struct scsi_cmnd to be executed | |
1606 | * @done: Callback function to be called when cmnd is completed | |
1607 | * | |
1608 | * Returns: | |
1609 | * 0 on success / other on failure | |
1610 | **/ | |
f281233d | 1611 | static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd, |
072b91f9 BK |
1612 | void (*done) (struct scsi_cmnd *)) |
1613 | { | |
1614 | struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); | |
1615 | struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); | |
1616 | struct ibmvfc_cmd *vfc_cmd; | |
1617 | struct ibmvfc_event *evt; | |
072b91f9 BK |
1618 | int rc; |
1619 | ||
1620 | if (unlikely((rc = fc_remote_port_chkready(rport))) || | |
1621 | unlikely((rc = ibmvfc_host_chkready(vhost)))) { | |
1622 | cmnd->result = rc; | |
1623 | done(cmnd); | |
1624 | return 0; | |
1625 | } | |
1626 | ||
1627 | cmnd->result = (DID_OK << 16); | |
1628 | evt = ibmvfc_get_event(vhost); | |
1629 | ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); | |
1630 | evt->cmnd = cmnd; | |
1631 | cmnd->scsi_done = done; | |
1632 | vfc_cmd = &evt->iu.cmd; | |
1633 | memset(vfc_cmd, 0, sizeof(*vfc_cmd)); | |
0aab6c3f TD |
1634 | vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); |
1635 | vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp)); | |
1636 | vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); | |
1637 | vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu)); | |
1638 | vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp)); | |
1639 | vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata); | |
1640 | vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); | |
1641 | vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); | |
072b91f9 BK |
1642 | int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); |
1643 | memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); | |
1644 | ||
50668633 CH |
1645 | if (cmnd->flags & SCMD_TAGGED) { |
1646 | vfc_cmd->task_tag = cpu_to_be64(cmnd->tag); | |
1647 | vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; | |
072b91f9 BK |
1648 | } |
1649 | ||
1650 | if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) | |
1651 | return ibmvfc_send_event(evt, vhost, 0); | |
1652 | ||
1653 | ibmvfc_free_event(evt); | |
1654 | if (rc == -ENOMEM) | |
1655 | return SCSI_MLQUEUE_HOST_BUSY; | |
1656 | ||
1657 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
1658 | scmd_printk(KERN_ERR, cmnd, | |
1659 | "Failed to map DMA buffer for command. rc=%d\n", rc); | |
1660 | ||
1661 | cmnd->result = DID_ERROR << 16; | |
1662 | done(cmnd); | |
1663 | return 0; | |
1664 | } | |
1665 | ||
f281233d JG |
1666 | static DEF_SCSI_QCMD(ibmvfc_queuecommand) |
1667 | ||
072b91f9 BK |
1668 | /** |
1669 | * ibmvfc_sync_completion - Signal that a synchronous command has completed | |
1670 | * @evt: ibmvfc event struct | |
1671 | * | |
1672 | **/ | |
1673 | static void ibmvfc_sync_completion(struct ibmvfc_event *evt) | |
1674 | { | |
1675 | /* copy the response back */ | |
1676 | if (evt->sync_iu) | |
1677 | *evt->sync_iu = *evt->xfer_iu; | |
1678 | ||
1679 | complete(&evt->comp); | |
1680 | } | |
1681 | ||
d31429e1 BK |
1682 | /** |
1683 | * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands | |
1684 | * @evt: struct ibmvfc_event | |
1685 | * | |
1686 | **/ | |
1687 | static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) | |
1688 | { | |
1689 | struct ibmvfc_host *vhost = evt->vhost; | |
1690 | ||
1691 | ibmvfc_free_event(evt); | |
1692 | vhost->aborting_passthru = 0; | |
1693 | dev_info(vhost->dev, "Passthru command cancelled\n"); | |
1694 | } | |
1695 | ||
1696 | /** | |
1697 | * ibmvfc_bsg_timeout - Handle a BSG timeout | |
1698 | * @job: struct fc_bsg_job that timed out | |
1699 | * | |
1700 | * Returns: | |
1701 | * 0 on success / other on failure | |
1702 | **/ | |
1703 | static int ibmvfc_bsg_timeout(struct fc_bsg_job *job) | |
1704 | { | |
1705 | struct ibmvfc_host *vhost = shost_priv(job->shost); | |
1706 | unsigned long port_id = (unsigned long)job->dd_data; | |
1707 | struct ibmvfc_event *evt; | |
1708 | struct ibmvfc_tmf *tmf; | |
1709 | unsigned long flags; | |
1710 | int rc; | |
1711 | ||
1712 | ENTER; | |
1713 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1714 | if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { | |
1715 | __ibmvfc_reset_host(vhost); | |
1716 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1717 | return 0; | |
1718 | } | |
1719 | ||
1720 | vhost->aborting_passthru = 1; | |
1721 | evt = ibmvfc_get_event(vhost); | |
1722 | ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); | |
1723 | ||
1724 | tmf = &evt->iu.tmf; | |
1725 | memset(tmf, 0, sizeof(*tmf)); | |
0aab6c3f TD |
1726 | tmf->common.version = cpu_to_be32(1); |
1727 | tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); | |
1728 | tmf->common.length = cpu_to_be16(sizeof(*tmf)); | |
1729 | tmf->scsi_id = cpu_to_be64(port_id); | |
1730 | tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); | |
1731 | tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); | |
d31429e1 BK |
1732 | rc = ibmvfc_send_event(evt, vhost, default_timeout); |
1733 | ||
1734 | if (rc != 0) { | |
1735 | vhost->aborting_passthru = 0; | |
1736 | dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); | |
1737 | rc = -EIO; | |
1738 | } else | |
1739 | dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", | |
1740 | port_id); | |
1741 | ||
1742 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1743 | ||
1744 | LEAVE; | |
1745 | return rc; | |
1746 | } | |
1747 | ||
1748 | /** | |
1749 | * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command | |
1750 | * @vhost: struct ibmvfc_host to send command | |
1751 | * @port_id: port ID to send command | |
1752 | * | |
1753 | * Returns: | |
1754 | * 0 on success / other on failure | |
1755 | **/ | |
1756 | static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) | |
1757 | { | |
1758 | struct ibmvfc_port_login *plogi; | |
1759 | struct ibmvfc_target *tgt; | |
1760 | struct ibmvfc_event *evt; | |
1761 | union ibmvfc_iu rsp_iu; | |
1762 | unsigned long flags; | |
1763 | int rc = 0, issue_login = 1; | |
1764 | ||
1765 | ENTER; | |
1766 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1767 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
1768 | if (tgt->scsi_id == port_id) { | |
1769 | issue_login = 0; | |
1770 | break; | |
1771 | } | |
1772 | } | |
1773 | ||
1774 | if (!issue_login) | |
1775 | goto unlock_out; | |
1776 | if (unlikely((rc = ibmvfc_host_chkready(vhost)))) | |
1777 | goto unlock_out; | |
1778 | ||
1779 | evt = ibmvfc_get_event(vhost); | |
1780 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); | |
1781 | plogi = &evt->iu.plogi; | |
1782 | memset(plogi, 0, sizeof(*plogi)); | |
0aab6c3f TD |
1783 | plogi->common.version = cpu_to_be32(1); |
1784 | plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); | |
1785 | plogi->common.length = cpu_to_be16(sizeof(*plogi)); | |
1786 | plogi->scsi_id = cpu_to_be64(port_id); | |
d31429e1 BK |
1787 | evt->sync_iu = &rsp_iu; |
1788 | init_completion(&evt->comp); | |
1789 | ||
1790 | rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
1791 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1792 | ||
1793 | if (rc) | |
1794 | return -EIO; | |
1795 | ||
1796 | wait_for_completion(&evt->comp); | |
1797 | ||
1798 | if (rsp_iu.plogi.common.status) | |
1799 | rc = -EIO; | |
1800 | ||
1801 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1802 | ibmvfc_free_event(evt); | |
1803 | unlock_out: | |
1804 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1805 | LEAVE; | |
1806 | return rc; | |
1807 | } | |
1808 | ||
1809 | /** | |
1810 | * ibmvfc_bsg_request - Handle a BSG request | |
1811 | * @job: struct fc_bsg_job to be executed | |
1812 | * | |
1813 | * Returns: | |
1814 | * 0 on success / other on failure | |
1815 | **/ | |
1816 | static int ibmvfc_bsg_request(struct fc_bsg_job *job) | |
1817 | { | |
1818 | struct ibmvfc_host *vhost = shost_priv(job->shost); | |
1819 | struct fc_rport *rport = job->rport; | |
1820 | struct ibmvfc_passthru_mad *mad; | |
1821 | struct ibmvfc_event *evt; | |
1822 | union ibmvfc_iu rsp_iu; | |
1823 | unsigned long flags, port_id = -1; | |
1824 | unsigned int code = job->request->msgcode; | |
1825 | int rc = 0, req_seg, rsp_seg, issue_login = 0; | |
1826 | u32 fc_flags, rsp_len; | |
1827 | ||
1828 | ENTER; | |
1829 | job->reply->reply_payload_rcv_len = 0; | |
1830 | if (rport) | |
1831 | port_id = rport->port_id; | |
1832 | ||
1833 | switch (code) { | |
1834 | case FC_BSG_HST_ELS_NOLOGIN: | |
1835 | port_id = (job->request->rqst_data.h_els.port_id[0] << 16) | | |
1836 | (job->request->rqst_data.h_els.port_id[1] << 8) | | |
1837 | job->request->rqst_data.h_els.port_id[2]; | |
1838 | case FC_BSG_RPT_ELS: | |
1839 | fc_flags = IBMVFC_FC_ELS; | |
1840 | break; | |
1841 | case FC_BSG_HST_CT: | |
1842 | issue_login = 1; | |
1843 | port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) | | |
1844 | (job->request->rqst_data.h_ct.port_id[1] << 8) | | |
1845 | job->request->rqst_data.h_ct.port_id[2]; | |
1846 | case FC_BSG_RPT_CT: | |
1847 | fc_flags = IBMVFC_FC_CT_IU; | |
1848 | break; | |
1849 | default: | |
1850 | return -ENOTSUPP; | |
1851 | }; | |
1852 | ||
1853 | if (port_id == -1) | |
1854 | return -EINVAL; | |
1855 | if (!mutex_trylock(&vhost->passthru_mutex)) | |
1856 | return -EBUSY; | |
1857 | ||
1858 | job->dd_data = (void *)port_id; | |
1859 | req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, | |
1860 | job->request_payload.sg_cnt, DMA_TO_DEVICE); | |
1861 | ||
1862 | if (!req_seg) { | |
1863 | mutex_unlock(&vhost->passthru_mutex); | |
1864 | return -ENOMEM; | |
1865 | } | |
1866 | ||
1867 | rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, | |
1868 | job->reply_payload.sg_cnt, DMA_FROM_DEVICE); | |
1869 | ||
1870 | if (!rsp_seg) { | |
1871 | dma_unmap_sg(vhost->dev, job->request_payload.sg_list, | |
1872 | job->request_payload.sg_cnt, DMA_TO_DEVICE); | |
1873 | mutex_unlock(&vhost->passthru_mutex); | |
1874 | return -ENOMEM; | |
1875 | } | |
1876 | ||
1877 | if (req_seg > 1 || rsp_seg > 1) { | |
1878 | rc = -EINVAL; | |
1879 | goto out; | |
1880 | } | |
1881 | ||
1882 | if (issue_login) | |
1883 | rc = ibmvfc_bsg_plogi(vhost, port_id); | |
1884 | ||
1885 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1886 | ||
1887 | if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || | |
1888 | unlikely((rc = ibmvfc_host_chkready(vhost)))) { | |
1889 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1890 | goto out; | |
1891 | } | |
1892 | ||
1893 | evt = ibmvfc_get_event(vhost); | |
1894 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); | |
1895 | mad = &evt->iu.passthru; | |
1896 | ||
1897 | memset(mad, 0, sizeof(*mad)); | |
0aab6c3f TD |
1898 | mad->common.version = cpu_to_be32(1); |
1899 | mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); | |
1900 | mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); | |
1901 | ||
1902 | mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + | |
1903 | offsetof(struct ibmvfc_passthru_mad, iu)); | |
1904 | mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); | |
1905 | ||
1906 | mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); | |
1907 | mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); | |
1908 | mad->iu.flags = cpu_to_be32(fc_flags); | |
1909 | mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); | |
1910 | ||
1911 | mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); | |
1912 | mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); | |
1913 | mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); | |
1914 | mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); | |
1915 | mad->iu.scsi_id = cpu_to_be64(port_id); | |
1916 | mad->iu.tag = cpu_to_be64((u64)evt); | |
1917 | rsp_len = be32_to_cpu(mad->iu.rsp.len); | |
d31429e1 BK |
1918 | |
1919 | evt->sync_iu = &rsp_iu; | |
1920 | init_completion(&evt->comp); | |
1921 | rc = ibmvfc_send_event(evt, vhost, 0); | |
1922 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1923 | ||
1924 | if (rc) { | |
1925 | rc = -EIO; | |
1926 | goto out; | |
1927 | } | |
1928 | ||
1929 | wait_for_completion(&evt->comp); | |
1930 | ||
1931 | if (rsp_iu.passthru.common.status) | |
1932 | rc = -EIO; | |
1933 | else | |
1934 | job->reply->reply_payload_rcv_len = rsp_len; | |
1935 | ||
1936 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1937 | ibmvfc_free_event(evt); | |
1938 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1939 | job->reply->result = rc; | |
1940 | job->job_done(job); | |
1941 | rc = 0; | |
1942 | out: | |
1943 | dma_unmap_sg(vhost->dev, job->request_payload.sg_list, | |
1944 | job->request_payload.sg_cnt, DMA_TO_DEVICE); | |
1945 | dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, | |
1946 | job->reply_payload.sg_cnt, DMA_FROM_DEVICE); | |
1947 | mutex_unlock(&vhost->passthru_mutex); | |
1948 | LEAVE; | |
1949 | return rc; | |
1950 | } | |
1951 | ||
072b91f9 BK |
1952 | /** |
1953 | * ibmvfc_reset_device - Reset the device with the specified reset type | |
1954 | * @sdev: scsi device to reset | |
1955 | * @type: reset type | |
1956 | * @desc: reset type description for log messages | |
1957 | * | |
1958 | * Returns: | |
1959 | * 0 on success / other on failure | |
1960 | **/ | |
1961 | static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) | |
1962 | { | |
1963 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
1964 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
1965 | struct ibmvfc_cmd *tmf; | |
50ed9a00 | 1966 | struct ibmvfc_event *evt = NULL; |
072b91f9 BK |
1967 | union ibmvfc_iu rsp_iu; |
1968 | struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; | |
1969 | int rsp_rc = -EBUSY; | |
1970 | unsigned long flags; | |
1971 | int rsp_code = 0; | |
1972 | ||
1973 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
1974 | if (vhost->state == IBMVFC_ACTIVE) { | |
1975 | evt = ibmvfc_get_event(vhost); | |
1976 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); | |
1977 | ||
1978 | tmf = &evt->iu.cmd; | |
1979 | memset(tmf, 0, sizeof(*tmf)); | |
0aab6c3f TD |
1980 | tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); |
1981 | tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); | |
1982 | tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); | |
1983 | tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); | |
1984 | tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); | |
1985 | tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); | |
1986 | tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); | |
072b91f9 | 1987 | int_to_scsilun(sdev->lun, &tmf->iu.lun); |
0aab6c3f | 1988 | tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); |
072b91f9 BK |
1989 | tmf->iu.tmf_flags = type; |
1990 | evt->sync_iu = &rsp_iu; | |
1991 | ||
1992 | init_completion(&evt->comp); | |
1993 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
1994 | } | |
1995 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
1996 | ||
1997 | if (rsp_rc != 0) { | |
1998 | sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", | |
1999 | desc, rsp_rc); | |
2000 | return -EIO; | |
2001 | } | |
2002 | ||
2003 | sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); | |
2004 | wait_for_completion(&evt->comp); | |
2005 | ||
230934a6 BK |
2006 | if (rsp_iu.cmd.status) |
2007 | rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); | |
2008 | ||
2009 | if (rsp_code) { | |
072b91f9 BK |
2010 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) |
2011 | rsp_code = fc_rsp->data.info.rsp_code; | |
2012 | ||
2013 | sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " | |
0aab6c3f TD |
2014 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, |
2015 | ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), | |
072b91f9 BK |
2016 | rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, |
2017 | fc_rsp->scsi_status); | |
2018 | rsp_rc = -EIO; | |
2019 | } else | |
2020 | sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); | |
2021 | ||
2022 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2023 | ibmvfc_free_event(evt); | |
2024 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2025 | return rsp_rc; | |
2026 | } | |
2027 | ||
2028 | /** | |
d2fab5cf BK |
2029 | * ibmvfc_match_rport - Match function for specified remote port |
2030 | * @evt: ibmvfc event struct | |
2031 | * @device: device to match (rport) | |
072b91f9 BK |
2032 | * |
2033 | * Returns: | |
d2fab5cf | 2034 | * 1 if event matches rport / 0 if event does not match rport |
072b91f9 | 2035 | **/ |
d2fab5cf | 2036 | static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) |
072b91f9 | 2037 | { |
d2fab5cf | 2038 | struct fc_rport *cmd_rport; |
072b91f9 | 2039 | |
d2fab5cf BK |
2040 | if (evt->cmnd) { |
2041 | cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); | |
2042 | if (cmd_rport == rport) | |
2043 | return 1; | |
072b91f9 | 2044 | } |
d2fab5cf BK |
2045 | return 0; |
2046 | } | |
072b91f9 | 2047 | |
d2fab5cf BK |
2048 | /** |
2049 | * ibmvfc_match_target - Match function for specified target | |
2050 | * @evt: ibmvfc event struct | |
2051 | * @device: device to match (starget) | |
2052 | * | |
2053 | * Returns: | |
2054 | * 1 if event matches starget / 0 if event does not match starget | |
2055 | **/ | |
2056 | static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) | |
2057 | { | |
2058 | if (evt->cmnd && scsi_target(evt->cmnd->device) == device) | |
2059 | return 1; | |
2060 | return 0; | |
2061 | } | |
072b91f9 | 2062 | |
d2fab5cf BK |
2063 | /** |
2064 | * ibmvfc_match_lun - Match function for specified LUN | |
2065 | * @evt: ibmvfc event struct | |
2066 | * @device: device to match (sdev) | |
2067 | * | |
2068 | * Returns: | |
2069 | * 1 if event matches sdev / 0 if event does not match sdev | |
2070 | **/ | |
2071 | static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) | |
2072 | { | |
2073 | if (evt->cmnd && evt->cmnd->device == device) | |
2074 | return 1; | |
2075 | return 0; | |
2076 | } | |
072b91f9 | 2077 | |
d2fab5cf BK |
2078 | /** |
2079 | * ibmvfc_wait_for_ops - Wait for ops to complete | |
2080 | * @vhost: ibmvfc host struct | |
2081 | * @device: device to match (starget or sdev) | |
2082 | * @match: match function | |
2083 | * | |
2084 | * Returns: | |
2085 | * SUCCESS / FAILED | |
2086 | **/ | |
2087 | static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, | |
2088 | int (*match) (struct ibmvfc_event *, void *)) | |
2089 | { | |
2090 | struct ibmvfc_event *evt; | |
2091 | DECLARE_COMPLETION_ONSTACK(comp); | |
2092 | int wait; | |
2093 | unsigned long flags; | |
2094 | signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; | |
072b91f9 | 2095 | |
d2fab5cf BK |
2096 | ENTER; |
2097 | do { | |
2098 | wait = 0; | |
2099 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2100 | list_for_each_entry(evt, &vhost->sent, queue) { | |
2101 | if (match(evt, device)) { | |
2102 | evt->eh_comp = ∁ | |
2103 | wait++; | |
2104 | } | |
2105 | } | |
2106 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
230934a6 | 2107 | |
d2fab5cf BK |
2108 | if (wait) { |
2109 | timeout = wait_for_completion_timeout(&comp, timeout); | |
072b91f9 | 2110 | |
d2fab5cf BK |
2111 | if (!timeout) { |
2112 | wait = 0; | |
2113 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2114 | list_for_each_entry(evt, &vhost->sent, queue) { | |
2115 | if (match(evt, device)) { | |
2116 | evt->eh_comp = NULL; | |
2117 | wait++; | |
2118 | } | |
2119 | } | |
2120 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2121 | if (wait) | |
2122 | dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); | |
2123 | LEAVE; | |
2124 | return wait ? FAILED : SUCCESS; | |
2125 | } | |
2126 | } | |
2127 | } while (wait); | |
072b91f9 | 2128 | |
d2fab5cf BK |
2129 | LEAVE; |
2130 | return SUCCESS; | |
072b91f9 BK |
2131 | } |
2132 | ||
2133 | /** | |
2134 | * ibmvfc_cancel_all - Cancel all outstanding commands to the device | |
2135 | * @sdev: scsi device to cancel commands | |
2136 | * @type: type of error recovery being performed | |
2137 | * | |
2138 | * This sends a cancel to the VIOS for the specified device. This does | |
2139 | * NOT send any abort to the actual device. That must be done separately. | |
2140 | * | |
2141 | * Returns: | |
2142 | * 0 on success / other on failure | |
2143 | **/ | |
2144 | static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) | |
2145 | { | |
2146 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
ad8dcffa BK |
2147 | struct scsi_target *starget = scsi_target(sdev); |
2148 | struct fc_rport *rport = starget_to_rport(starget); | |
072b91f9 BK |
2149 | struct ibmvfc_tmf *tmf; |
2150 | struct ibmvfc_event *evt, *found_evt; | |
2151 | union ibmvfc_iu rsp; | |
2152 | int rsp_rc = -EBUSY; | |
2153 | unsigned long flags; | |
2154 | u16 status; | |
2155 | ||
2156 | ENTER; | |
2157 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2158 | found_evt = NULL; | |
2159 | list_for_each_entry(evt, &vhost->sent, queue) { | |
2160 | if (evt->cmnd && evt->cmnd->device == sdev) { | |
2161 | found_evt = evt; | |
2162 | break; | |
2163 | } | |
2164 | } | |
2165 | ||
2166 | if (!found_evt) { | |
2167 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
2168 | sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); | |
2169 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2170 | return 0; | |
2171 | } | |
2172 | ||
55d29bf0 | 2173 | if (vhost->logged_in) { |
072b91f9 BK |
2174 | evt = ibmvfc_get_event(vhost); |
2175 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); | |
2176 | ||
2177 | tmf = &evt->iu.tmf; | |
2178 | memset(tmf, 0, sizeof(*tmf)); | |
0aab6c3f TD |
2179 | tmf->common.version = cpu_to_be32(1); |
2180 | tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); | |
2181 | tmf->common.length = cpu_to_be16(sizeof(*tmf)); | |
2182 | tmf->scsi_id = cpu_to_be64(rport->port_id); | |
072b91f9 | 2183 | int_to_scsilun(sdev->lun, &tmf->lun); |
0aab6c3f | 2184 | if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS)) |
90f725db | 2185 | type &= ~IBMVFC_TMF_SUPPRESS_ABTS; |
55d29bf0 | 2186 | if (vhost->state == IBMVFC_ACTIVE) |
0aab6c3f | 2187 | tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); |
55d29bf0 | 2188 | else |
0aab6c3f TD |
2189 | tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); |
2190 | tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); | |
2191 | tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); | |
072b91f9 BK |
2192 | |
2193 | evt->sync_iu = &rsp; | |
2194 | init_completion(&evt->comp); | |
2195 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
2196 | } | |
2197 | ||
2198 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2199 | ||
2200 | if (rsp_rc != 0) { | |
2201 | sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); | |
c281e32a BK |
2202 | /* If failure is received, the host adapter is most likely going |
2203 | through reset, return success so the caller will wait for the command | |
2204 | being cancelled to get returned */ | |
2205 | return 0; | |
072b91f9 BK |
2206 | } |
2207 | ||
2208 | sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); | |
2209 | ||
2210 | wait_for_completion(&evt->comp); | |
0aab6c3f | 2211 | status = be16_to_cpu(rsp.mad_common.status); |
072b91f9 BK |
2212 | spin_lock_irqsave(vhost->host->host_lock, flags); |
2213 | ibmvfc_free_event(evt); | |
2214 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2215 | ||
2216 | if (status != IBMVFC_MAD_SUCCESS) { | |
2217 | sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); | |
c281e32a BK |
2218 | switch (status) { |
2219 | case IBMVFC_MAD_DRIVER_FAILED: | |
2220 | case IBMVFC_MAD_CRQ_ERROR: | |
2221 | /* Host adapter most likely going through reset, return success to | |
2222 | the caller will wait for the command being cancelled to get returned */ | |
2223 | return 0; | |
2224 | default: | |
2225 | return -EIO; | |
2226 | }; | |
072b91f9 BK |
2227 | } |
2228 | ||
2229 | sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); | |
2230 | return 0; | |
2231 | } | |
2232 | ||
ad8dcffa | 2233 | /** |
d2fab5cf | 2234 | * ibmvfc_match_key - Match function for specified cancel key |
ad8dcffa | 2235 | * @evt: ibmvfc event struct |
d2fab5cf | 2236 | * @key: cancel key to match |
ad8dcffa BK |
2237 | * |
2238 | * Returns: | |
d2fab5cf | 2239 | * 1 if event matches key / 0 if event does not match key |
ad8dcffa | 2240 | **/ |
d2fab5cf | 2241 | static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) |
ad8dcffa | 2242 | { |
d2fab5cf | 2243 | unsigned long cancel_key = (unsigned long)key; |
ad8dcffa | 2244 | |
d2fab5cf | 2245 | if (evt->crq.format == IBMVFC_CMD_FORMAT && |
0aab6c3f | 2246 | be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) |
ad8dcffa BK |
2247 | return 1; |
2248 | return 0; | |
2249 | } | |
2250 | ||
a077c7fa BK |
2251 | /** |
2252 | * ibmvfc_match_evt - Match function for specified event | |
2253 | * @evt: ibmvfc event struct | |
2254 | * @match: event to match | |
2255 | * | |
2256 | * Returns: | |
2257 | * 1 if event matches key / 0 if event does not match key | |
2258 | **/ | |
2259 | static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) | |
2260 | { | |
2261 | if (evt == match) | |
2262 | return 1; | |
2263 | return 0; | |
2264 | } | |
2265 | ||
ad8dcffa | 2266 | /** |
d2fab5cf BK |
2267 | * ibmvfc_abort_task_set - Abort outstanding commands to the device |
2268 | * @sdev: scsi device to abort commands | |
2269 | * | |
2270 | * This sends an Abort Task Set to the VIOS for the specified device. This does | |
2271 | * NOT send any cancel to the VIOS. That must be done separately. | |
ad8dcffa BK |
2272 | * |
2273 | * Returns: | |
d2fab5cf | 2274 | * 0 on success / other on failure |
ad8dcffa | 2275 | **/ |
d2fab5cf | 2276 | static int ibmvfc_abort_task_set(struct scsi_device *sdev) |
ad8dcffa | 2277 | { |
d2fab5cf BK |
2278 | struct ibmvfc_host *vhost = shost_priv(sdev->host); |
2279 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
2280 | struct ibmvfc_cmd *tmf; | |
2281 | struct ibmvfc_event *evt, *found_evt; | |
2282 | union ibmvfc_iu rsp_iu; | |
2283 | struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; | |
2284 | int rc, rsp_rc = -EBUSY; | |
2285 | unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; | |
2286 | int rsp_code = 0; | |
ad8dcffa | 2287 | |
d2fab5cf BK |
2288 | spin_lock_irqsave(vhost->host->host_lock, flags); |
2289 | found_evt = NULL; | |
2290 | list_for_each_entry(evt, &vhost->sent, queue) { | |
2291 | if (evt->cmnd && evt->cmnd->device == sdev) { | |
2292 | found_evt = evt; | |
2293 | break; | |
ad8dcffa | 2294 | } |
d2fab5cf BK |
2295 | } |
2296 | ||
2297 | if (!found_evt) { | |
2298 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) | |
2299 | sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); | |
ad8dcffa | 2300 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
d2fab5cf BK |
2301 | return 0; |
2302 | } | |
ad8dcffa | 2303 | |
d2fab5cf BK |
2304 | if (vhost->state == IBMVFC_ACTIVE) { |
2305 | evt = ibmvfc_get_event(vhost); | |
2306 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); | |
ad8dcffa | 2307 | |
d2fab5cf BK |
2308 | tmf = &evt->iu.cmd; |
2309 | memset(tmf, 0, sizeof(*tmf)); | |
0aab6c3f TD |
2310 | tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); |
2311 | tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); | |
2312 | tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); | |
2313 | tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); | |
2314 | tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); | |
2315 | tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); | |
2316 | tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); | |
d2fab5cf | 2317 | int_to_scsilun(sdev->lun, &tmf->iu.lun); |
0aab6c3f | 2318 | tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); |
d2fab5cf BK |
2319 | tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; |
2320 | evt->sync_iu = &rsp_iu; | |
2321 | ||
2322 | init_completion(&evt->comp); | |
2323 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
2324 | } | |
2325 | ||
2326 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2327 | ||
2328 | if (rsp_rc != 0) { | |
2329 | sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); | |
2330 | return -EIO; | |
2331 | } | |
2332 | ||
2333 | sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); | |
2334 | timeout = wait_for_completion_timeout(&evt->comp, timeout); | |
2335 | ||
2336 | if (!timeout) { | |
f8804b72 | 2337 | rc = ibmvfc_cancel_all(sdev, 0); |
d2fab5cf BK |
2338 | if (!rc) { |
2339 | rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); | |
2340 | if (rc == SUCCESS) | |
2341 | rc = 0; | |
ad8dcffa | 2342 | } |
ad8dcffa | 2343 | |
d2fab5cf BK |
2344 | if (rc) { |
2345 | sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); | |
2346 | ibmvfc_reset_host(vhost); | |
a077c7fa BK |
2347 | rsp_rc = -EIO; |
2348 | rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); | |
2349 | ||
2350 | if (rc == SUCCESS) | |
2351 | rsp_rc = 0; | |
2352 | ||
2353 | rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); | |
2354 | if (rc != SUCCESS) { | |
2355 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2356 | ibmvfc_hard_reset_host(vhost); | |
2357 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2358 | rsp_rc = 0; | |
2359 | } | |
2360 | ||
d2fab5cf BK |
2361 | goto out; |
2362 | } | |
2363 | } | |
2364 | ||
2365 | if (rsp_iu.cmd.status) | |
2366 | rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); | |
2367 | ||
2368 | if (rsp_code) { | |
2369 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) | |
2370 | rsp_code = fc_rsp->data.info.rsp_code; | |
2371 | ||
2372 | sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " | |
2373 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", | |
0aab6c3f | 2374 | ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), |
d2fab5cf BK |
2375 | rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, |
2376 | fc_rsp->scsi_status); | |
2377 | rsp_rc = -EIO; | |
2378 | } else | |
2379 | sdev_printk(KERN_INFO, sdev, "Abort successful\n"); | |
2380 | ||
2381 | out: | |
2382 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2383 | ibmvfc_free_event(evt); | |
2384 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
2385 | return rsp_rc; | |
ad8dcffa BK |
2386 | } |
2387 | ||
072b91f9 BK |
2388 | /** |
2389 | * ibmvfc_eh_abort_handler - Abort a command | |
2390 | * @cmd: scsi command to abort | |
2391 | * | |
2392 | * Returns: | |
93631b4a | 2393 | * SUCCESS / FAST_IO_FAIL / FAILED |
072b91f9 BK |
2394 | **/ |
2395 | static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) | |
2396 | { | |
ad8dcffa BK |
2397 | struct scsi_device *sdev = cmd->device; |
2398 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
55d29bf0 | 2399 | int cancel_rc, block_rc; |
ad8dcffa | 2400 | int rc = FAILED; |
072b91f9 BK |
2401 | |
2402 | ENTER; | |
93631b4a | 2403 | block_rc = fc_block_scsi_eh(cmd); |
072b91f9 | 2404 | ibmvfc_wait_while_resetting(vhost); |
93631b4a BK |
2405 | if (block_rc != FAST_IO_FAIL) { |
2406 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); | |
55d29bf0 | 2407 | ibmvfc_abort_task_set(sdev); |
93631b4a | 2408 | } else |
90f725db | 2409 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); |
072b91f9 | 2410 | |
55d29bf0 | 2411 | if (!cancel_rc) |
ad8dcffa | 2412 | rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); |
072b91f9 | 2413 | |
93631b4a BK |
2414 | if (block_rc == FAST_IO_FAIL && rc != FAILED) |
2415 | rc = FAST_IO_FAIL; | |
2416 | ||
072b91f9 | 2417 | LEAVE; |
ad8dcffa | 2418 | return rc; |
072b91f9 BK |
2419 | } |
2420 | ||
2421 | /** | |
2422 | * ibmvfc_eh_device_reset_handler - Reset a single LUN | |
2423 | * @cmd: scsi command struct | |
2424 | * | |
2425 | * Returns: | |
93631b4a | 2426 | * SUCCESS / FAST_IO_FAIL / FAILED |
072b91f9 BK |
2427 | **/ |
2428 | static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) | |
2429 | { | |
ad8dcffa BK |
2430 | struct scsi_device *sdev = cmd->device; |
2431 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
93631b4a | 2432 | int cancel_rc, block_rc, reset_rc = 0; |
ad8dcffa | 2433 | int rc = FAILED; |
072b91f9 BK |
2434 | |
2435 | ENTER; | |
93631b4a | 2436 | block_rc = fc_block_scsi_eh(cmd); |
072b91f9 | 2437 | ibmvfc_wait_while_resetting(vhost); |
93631b4a BK |
2438 | if (block_rc != FAST_IO_FAIL) { |
2439 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); | |
2440 | reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); | |
2441 | } else | |
90f725db | 2442 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); |
072b91f9 | 2443 | |
ad8dcffa BK |
2444 | if (!cancel_rc && !reset_rc) |
2445 | rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); | |
072b91f9 | 2446 | |
93631b4a BK |
2447 | if (block_rc == FAST_IO_FAIL && rc != FAILED) |
2448 | rc = FAST_IO_FAIL; | |
2449 | ||
072b91f9 | 2450 | LEAVE; |
ad8dcffa | 2451 | return rc; |
072b91f9 BK |
2452 | } |
2453 | ||
93631b4a BK |
2454 | /** |
2455 | * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function | |
2456 | * @sdev: scsi device struct | |
2457 | * @data: return code | |
2458 | * | |
2459 | **/ | |
2460 | static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) | |
2461 | { | |
2462 | unsigned long *rc = data; | |
90f725db | 2463 | *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); |
93631b4a BK |
2464 | } |
2465 | ||
4a5c4a5e BK |
2466 | /** |
2467 | * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function | |
2468 | * @sdev: scsi device struct | |
2469 | * @data: return code | |
2470 | * | |
2471 | **/ | |
2472 | static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) | |
072b91f9 BK |
2473 | { |
2474 | unsigned long *rc = data; | |
2475 | *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); | |
2476 | } | |
2477 | ||
072b91f9 BK |
2478 | /** |
2479 | * ibmvfc_eh_target_reset_handler - Reset the target | |
2480 | * @cmd: scsi command struct | |
2481 | * | |
2482 | * Returns: | |
93631b4a | 2483 | * SUCCESS / FAST_IO_FAIL / FAILED |
072b91f9 BK |
2484 | **/ |
2485 | static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) | |
2486 | { | |
ad8dcffa BK |
2487 | struct scsi_device *sdev = cmd->device; |
2488 | struct ibmvfc_host *vhost = shost_priv(sdev->host); | |
2489 | struct scsi_target *starget = scsi_target(sdev); | |
93631b4a BK |
2490 | int block_rc; |
2491 | int reset_rc = 0; | |
ad8dcffa | 2492 | int rc = FAILED; |
072b91f9 | 2493 | unsigned long cancel_rc = 0; |
072b91f9 BK |
2494 | |
2495 | ENTER; | |
93631b4a | 2496 | block_rc = fc_block_scsi_eh(cmd); |
072b91f9 | 2497 | ibmvfc_wait_while_resetting(vhost); |
93631b4a BK |
2498 | if (block_rc != FAST_IO_FAIL) { |
2499 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); | |
2500 | reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); | |
2501 | } else | |
2502 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); | |
072b91f9 | 2503 | |
ad8dcffa BK |
2504 | if (!cancel_rc && !reset_rc) |
2505 | rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); | |
072b91f9 | 2506 | |
93631b4a BK |
2507 | if (block_rc == FAST_IO_FAIL && rc != FAILED) |
2508 | rc = FAST_IO_FAIL; | |
2509 | ||
072b91f9 | 2510 | LEAVE; |
ad8dcffa | 2511 | return rc; |
072b91f9 BK |
2512 | } |
2513 | ||
2514 | /** | |
2515 | * ibmvfc_eh_host_reset_handler - Reset the connection to the server | |
2516 | * @cmd: struct scsi_cmnd having problems | |
2517 | * | |
2518 | **/ | |
2519 | static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) | |
2520 | { | |
93631b4a | 2521 | int rc, block_rc; |
072b91f9 BK |
2522 | struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
2523 | ||
93631b4a | 2524 | block_rc = fc_block_scsi_eh(cmd); |
072b91f9 BK |
2525 | dev_err(vhost->dev, "Resetting connection due to error recovery\n"); |
2526 | rc = ibmvfc_issue_fc_host_lip(vhost->host); | |
93631b4a BK |
2527 | |
2528 | if (block_rc == FAST_IO_FAIL) | |
2529 | return FAST_IO_FAIL; | |
2530 | ||
072b91f9 BK |
2531 | return rc ? FAILED : SUCCESS; |
2532 | } | |
2533 | ||
2534 | /** | |
2535 | * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. | |
2536 | * @rport: rport struct | |
2537 | * | |
2538 | * Return value: | |
2539 | * none | |
2540 | **/ | |
2541 | static void ibmvfc_terminate_rport_io(struct fc_rport *rport) | |
2542 | { | |
d2fab5cf | 2543 | struct Scsi_Host *shost = rport_to_shost(rport); |
072b91f9 | 2544 | struct ibmvfc_host *vhost = shost_priv(shost); |
d2fab5cf BK |
2545 | struct fc_rport *dev_rport; |
2546 | struct scsi_device *sdev; | |
2547 | unsigned long rc; | |
072b91f9 BK |
2548 | |
2549 | ENTER; | |
d2fab5cf BK |
2550 | shost_for_each_device(sdev, shost) { |
2551 | dev_rport = starget_to_rport(scsi_target(sdev)); | |
2552 | if (dev_rport != rport) | |
2553 | continue; | |
90f725db | 2554 | ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); |
d2fab5cf | 2555 | } |
072b91f9 | 2556 | |
d2fab5cf | 2557 | rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); |
ad8dcffa BK |
2558 | |
2559 | if (rc == FAILED) | |
072b91f9 | 2560 | ibmvfc_issue_fc_host_lip(shost); |
072b91f9 BK |
2561 | LEAVE; |
2562 | } | |
2563 | ||
d99e5f48 | 2564 | static const struct ibmvfc_async_desc ae_desc [] = { |
402c6eec RJ |
2565 | { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, |
2566 | { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, | |
2567 | { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, | |
2568 | { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, | |
2569 | { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, | |
2570 | { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, | |
2571 | { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, | |
2572 | { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, | |
2573 | { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, | |
2574 | { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, | |
2575 | { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, | |
2576 | { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, | |
2577 | { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, | |
072b91f9 BK |
2578 | }; |
2579 | ||
d99e5f48 | 2580 | static const struct ibmvfc_async_desc unknown_ae = { |
402c6eec | 2581 | "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL |
d99e5f48 | 2582 | }; |
072b91f9 BK |
2583 | |
2584 | /** | |
2585 | * ibmvfc_get_ae_desc - Get text description for async event | |
2586 | * @ae: async event | |
2587 | * | |
2588 | **/ | |
d99e5f48 | 2589 | static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) |
072b91f9 BK |
2590 | { |
2591 | int i; | |
2592 | ||
2593 | for (i = 0; i < ARRAY_SIZE(ae_desc); i++) | |
2594 | if (ae_desc[i].ae == ae) | |
d99e5f48 BK |
2595 | return &ae_desc[i]; |
2596 | ||
2597 | return &unknown_ae; | |
2598 | } | |
2599 | ||
2600 | static const struct { | |
2601 | enum ibmvfc_ae_link_state state; | |
2602 | const char *desc; | |
2603 | } link_desc [] = { | |
2604 | { IBMVFC_AE_LS_LINK_UP, " link up" }, | |
2605 | { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, | |
2606 | { IBMVFC_AE_LS_LINK_DOWN, " link down" }, | |
2607 | { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, | |
2608 | }; | |
2609 | ||
2610 | /** | |
2611 | * ibmvfc_get_link_state - Get text description for link state | |
2612 | * @state: link state | |
2613 | * | |
2614 | **/ | |
2615 | static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) | |
2616 | { | |
2617 | int i; | |
2618 | ||
2619 | for (i = 0; i < ARRAY_SIZE(link_desc); i++) | |
2620 | if (link_desc[i].state == state) | |
2621 | return link_desc[i].desc; | |
072b91f9 | 2622 | |
d99e5f48 | 2623 | return ""; |
072b91f9 BK |
2624 | } |
2625 | ||
2626 | /** | |
2627 | * ibmvfc_handle_async - Handle an async event from the adapter | |
2628 | * @crq: crq to process | |
2629 | * @vhost: ibmvfc host struct | |
2630 | * | |
2631 | **/ | |
2632 | static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, | |
2633 | struct ibmvfc_host *vhost) | |
2634 | { | |
0aab6c3f | 2635 | const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); |
6d29cc56 | 2636 | struct ibmvfc_target *tgt; |
072b91f9 | 2637 | |
d99e5f48 | 2638 | ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," |
21367e20 TD |
2639 | " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id), |
2640 | be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name), | |
d99e5f48 | 2641 | ibmvfc_get_link_state(crq->link_state)); |
072b91f9 | 2642 | |
0aab6c3f | 2643 | switch (be64_to_cpu(crq->event)) { |
072b91f9 | 2644 | case IBMVFC_AE_RESUME: |
497f9c50 BK |
2645 | switch (crq->link_state) { |
2646 | case IBMVFC_AE_LS_LINK_DOWN: | |
2647 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
2648 | break; | |
2649 | case IBMVFC_AE_LS_LINK_DEAD: | |
2650 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
2651 | break; | |
2652 | case IBMVFC_AE_LS_LINK_UP: | |
2653 | case IBMVFC_AE_LS_LINK_BOUNCED: | |
2654 | default: | |
2655 | vhost->events_to_log |= IBMVFC_AE_LINKUP; | |
2656 | vhost->delay_init = 1; | |
2657 | __ibmvfc_reset_host(vhost); | |
2658 | break; | |
2659 | }; | |
2660 | ||
2661 | break; | |
2662 | case IBMVFC_AE_LINK_UP: | |
072b91f9 | 2663 | vhost->events_to_log |= IBMVFC_AE_LINKUP; |
d2131b33 BK |
2664 | vhost->delay_init = 1; |
2665 | __ibmvfc_reset_host(vhost); | |
072b91f9 BK |
2666 | break; |
2667 | case IBMVFC_AE_SCN_FABRIC: | |
d2131b33 | 2668 | case IBMVFC_AE_SCN_DOMAIN: |
072b91f9 | 2669 | vhost->events_to_log |= IBMVFC_AE_RSCN; |
5cdf1626 BK |
2670 | if (vhost->state < IBMVFC_HALTED) { |
2671 | vhost->delay_init = 1; | |
2672 | __ibmvfc_reset_host(vhost); | |
2673 | } | |
072b91f9 BK |
2674 | break; |
2675 | case IBMVFC_AE_SCN_NPORT: | |
2676 | case IBMVFC_AE_SCN_GROUP: | |
072b91f9 | 2677 | vhost->events_to_log |= IBMVFC_AE_RSCN; |
6d29cc56 BK |
2678 | ibmvfc_reinit_host(vhost); |
2679 | break; | |
072b91f9 BK |
2680 | case IBMVFC_AE_ELS_LOGO: |
2681 | case IBMVFC_AE_ELS_PRLO: | |
2682 | case IBMVFC_AE_ELS_PLOGI: | |
6d29cc56 BK |
2683 | list_for_each_entry(tgt, &vhost->targets, queue) { |
2684 | if (!crq->scsi_id && !crq->wwpn && !crq->node_name) | |
2685 | break; | |
0aab6c3f | 2686 | if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) |
6d29cc56 | 2687 | continue; |
0aab6c3f | 2688 | if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) |
6d29cc56 | 2689 | continue; |
0aab6c3f | 2690 | if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) |
6d29cc56 | 2691 | continue; |
0aab6c3f | 2692 | if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) |
017b2ae3 | 2693 | tgt->logo_rcvd = 1; |
0aab6c3f | 2694 | if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { |
017b2ae3 BK |
2695 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
2696 | ibmvfc_reinit_host(vhost); | |
2697 | } | |
6d29cc56 | 2698 | } |
072b91f9 BK |
2699 | break; |
2700 | case IBMVFC_AE_LINK_DOWN: | |
2701 | case IBMVFC_AE_ADAPTER_FAILED: | |
2702 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); | |
2703 | break; | |
2704 | case IBMVFC_AE_LINK_DEAD: | |
2705 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); | |
2706 | break; | |
2707 | case IBMVFC_AE_HALT: | |
2708 | ibmvfc_link_down(vhost, IBMVFC_HALTED); | |
2709 | break; | |
2710 | default: | |
775a42ec | 2711 | dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); |
072b91f9 BK |
2712 | break; |
2713 | }; | |
2714 | } | |
2715 | ||
2716 | /** | |
2717 | * ibmvfc_handle_crq - Handles and frees received events in the CRQ | |
2718 | * @crq: Command/Response queue | |
2719 | * @vhost: ibmvfc host struct | |
2720 | * | |
2721 | **/ | |
2722 | static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) | |
2723 | { | |
2724 | long rc; | |
0aab6c3f | 2725 | struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); |
072b91f9 BK |
2726 | |
2727 | switch (crq->valid) { | |
2728 | case IBMVFC_CRQ_INIT_RSP: | |
2729 | switch (crq->format) { | |
2730 | case IBMVFC_CRQ_INIT: | |
2731 | dev_info(vhost->dev, "Partner initialized\n"); | |
2732 | /* Send back a response */ | |
2733 | rc = ibmvfc_send_crq_init_complete(vhost); | |
2734 | if (rc == 0) | |
861890c6 | 2735 | ibmvfc_init_host(vhost); |
072b91f9 BK |
2736 | else |
2737 | dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); | |
2738 | break; | |
2739 | case IBMVFC_CRQ_INIT_COMPLETE: | |
2740 | dev_info(vhost->dev, "Partner initialization complete\n"); | |
861890c6 | 2741 | ibmvfc_init_host(vhost); |
072b91f9 BK |
2742 | break; |
2743 | default: | |
2744 | dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); | |
2745 | } | |
2746 | return; | |
2747 | case IBMVFC_CRQ_XPORT_EVENT: | |
2748 | vhost->state = IBMVFC_NO_CRQ; | |
79111d08 | 2749 | vhost->logged_in = 0; |
072b91f9 BK |
2750 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
2751 | if (crq->format == IBMVFC_PARTITION_MIGRATED) { | |
2752 | /* We need to re-setup the interpartition connection */ | |
2753 | dev_info(vhost->dev, "Re-enabling adapter\n"); | |
2754 | vhost->client_migrated = 1; | |
2755 | ibmvfc_purge_requests(vhost, DID_REQUEUE); | |
73ee5d86 BK |
2756 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
2757 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); | |
072b91f9 BK |
2758 | } else { |
2759 | dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); | |
072b91f9 | 2760 | ibmvfc_purge_requests(vhost, DID_ERROR); |
73ee5d86 BK |
2761 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
2762 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); | |
072b91f9 BK |
2763 | } |
2764 | return; | |
2765 | case IBMVFC_CRQ_CMD_RSP: | |
2766 | break; | |
2767 | default: | |
2768 | dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); | |
2769 | return; | |
2770 | } | |
2771 | ||
2772 | if (crq->format == IBMVFC_ASYNC_EVENT) | |
2773 | return; | |
2774 | ||
2775 | /* The only kind of payload CRQs we should get are responses to | |
2776 | * things we send. Make sure this response is to something we | |
2777 | * actually sent | |
2778 | */ | |
2779 | if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { | |
775a42ec | 2780 | dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", |
072b91f9 BK |
2781 | crq->ioba); |
2782 | return; | |
2783 | } | |
2784 | ||
2785 | if (unlikely(atomic_read(&evt->free))) { | |
775a42ec | 2786 | dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", |
072b91f9 BK |
2787 | crq->ioba); |
2788 | return; | |
2789 | } | |
2790 | ||
2791 | del_timer(&evt->timer); | |
2792 | list_del(&evt->queue); | |
2793 | ibmvfc_trc_end(evt); | |
2794 | evt->done(evt); | |
2795 | } | |
2796 | ||
2797 | /** | |
2798 | * ibmvfc_scan_finished - Check if the device scan is done. | |
2799 | * @shost: scsi host struct | |
2800 | * @time: current elapsed time | |
2801 | * | |
2802 | * Returns: | |
2803 | * 0 if scan is not done / 1 if scan is done | |
2804 | **/ | |
2805 | static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) | |
2806 | { | |
2807 | unsigned long flags; | |
2808 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2809 | int done = 0; | |
2810 | ||
2811 | spin_lock_irqsave(shost->host_lock, flags); | |
2812 | if (time >= (init_timeout * HZ)) { | |
2813 | dev_info(vhost->dev, "Scan taking longer than %d seconds, " | |
2814 | "continuing initialization\n", init_timeout); | |
2815 | done = 1; | |
2816 | } | |
2817 | ||
43c8da90 | 2818 | if (vhost->scan_complete) |
072b91f9 BK |
2819 | done = 1; |
2820 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2821 | return done; | |
2822 | } | |
2823 | ||
2824 | /** | |
2825 | * ibmvfc_slave_alloc - Setup the device's task set value | |
2826 | * @sdev: struct scsi_device device to configure | |
2827 | * | |
2828 | * Set the device's task set value so that error handling works as | |
2829 | * expected. | |
2830 | * | |
2831 | * Returns: | |
2832 | * 0 on success / -ENXIO if device does not exist | |
2833 | **/ | |
2834 | static int ibmvfc_slave_alloc(struct scsi_device *sdev) | |
2835 | { | |
2836 | struct Scsi_Host *shost = sdev->host; | |
2837 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); | |
2838 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2839 | unsigned long flags = 0; | |
2840 | ||
2841 | if (!rport || fc_remote_port_chkready(rport)) | |
2842 | return -ENXIO; | |
2843 | ||
2844 | spin_lock_irqsave(shost->host_lock, flags); | |
2845 | sdev->hostdata = (void *)(unsigned long)vhost->task_set++; | |
2846 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2847 | return 0; | |
2848 | } | |
2849 | ||
ad8dcffa BK |
2850 | /** |
2851 | * ibmvfc_target_alloc - Setup the target's task set value | |
2852 | * @starget: struct scsi_target | |
2853 | * | |
2854 | * Set the target's task set value so that error handling works as | |
2855 | * expected. | |
2856 | * | |
2857 | * Returns: | |
2858 | * 0 on success / -ENXIO if device does not exist | |
2859 | **/ | |
2860 | static int ibmvfc_target_alloc(struct scsi_target *starget) | |
2861 | { | |
2862 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2863 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2864 | unsigned long flags = 0; | |
2865 | ||
2866 | spin_lock_irqsave(shost->host_lock, flags); | |
2867 | starget->hostdata = (void *)(unsigned long)vhost->task_set++; | |
2868 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2869 | return 0; | |
2870 | } | |
2871 | ||
072b91f9 BK |
2872 | /** |
2873 | * ibmvfc_slave_configure - Configure the device | |
2874 | * @sdev: struct scsi_device device to configure | |
2875 | * | |
2876 | * Enable allow_restart for a device if it is a disk. Adjust the | |
2877 | * queue_depth here also. | |
2878 | * | |
2879 | * Returns: | |
2880 | * 0 | |
2881 | **/ | |
2882 | static int ibmvfc_slave_configure(struct scsi_device *sdev) | |
2883 | { | |
2884 | struct Scsi_Host *shost = sdev->host; | |
072b91f9 BK |
2885 | unsigned long flags = 0; |
2886 | ||
2887 | spin_lock_irqsave(shost->host_lock, flags); | |
2888 | if (sdev->type == TYPE_DISK) | |
2889 | sdev->allow_restart = 1; | |
072b91f9 BK |
2890 | spin_unlock_irqrestore(shost->host_lock, flags); |
2891 | return 0; | |
2892 | } | |
2893 | ||
2894 | /** | |
2895 | * ibmvfc_change_queue_depth - Change the device's queue depth | |
2896 | * @sdev: scsi device struct | |
2897 | * @qdepth: depth to set | |
e881a172 | 2898 | * @reason: calling context |
072b91f9 BK |
2899 | * |
2900 | * Return value: | |
2901 | * actual depth set | |
2902 | **/ | |
db5ed4df | 2903 | static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) |
072b91f9 BK |
2904 | { |
2905 | if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) | |
2906 | qdepth = IBMVFC_MAX_CMDS_PER_LUN; | |
2907 | ||
db5ed4df | 2908 | return scsi_change_queue_depth(sdev, qdepth); |
072b91f9 BK |
2909 | } |
2910 | ||
072b91f9 BK |
2911 | static ssize_t ibmvfc_show_host_partition_name(struct device *dev, |
2912 | struct device_attribute *attr, char *buf) | |
2913 | { | |
2914 | struct Scsi_Host *shost = class_to_shost(dev); | |
2915 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2916 | ||
2917 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2918 | vhost->login_buf->resp.partition_name); | |
2919 | } | |
2920 | ||
072b91f9 BK |
2921 | static ssize_t ibmvfc_show_host_device_name(struct device *dev, |
2922 | struct device_attribute *attr, char *buf) | |
2923 | { | |
2924 | struct Scsi_Host *shost = class_to_shost(dev); | |
2925 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2926 | ||
2927 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2928 | vhost->login_buf->resp.device_name); | |
2929 | } | |
2930 | ||
072b91f9 BK |
2931 | static ssize_t ibmvfc_show_host_loc_code(struct device *dev, |
2932 | struct device_attribute *attr, char *buf) | |
2933 | { | |
2934 | struct Scsi_Host *shost = class_to_shost(dev); | |
2935 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2936 | ||
2937 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2938 | vhost->login_buf->resp.port_loc_code); | |
2939 | } | |
2940 | ||
072b91f9 BK |
2941 | static ssize_t ibmvfc_show_host_drc_name(struct device *dev, |
2942 | struct device_attribute *attr, char *buf) | |
2943 | { | |
2944 | struct Scsi_Host *shost = class_to_shost(dev); | |
2945 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2946 | ||
2947 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
2948 | vhost->login_buf->resp.drc_name); | |
2949 | } | |
2950 | ||
072b91f9 BK |
2951 | static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, |
2952 | struct device_attribute *attr, char *buf) | |
2953 | { | |
2954 | struct Scsi_Host *shost = class_to_shost(dev); | |
2955 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2956 | return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); | |
2957 | } | |
2958 | ||
497f9c50 BK |
2959 | static ssize_t ibmvfc_show_host_capabilities(struct device *dev, |
2960 | struct device_attribute *attr, char *buf) | |
2961 | { | |
2962 | struct Scsi_Host *shost = class_to_shost(dev); | |
2963 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2964 | return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); | |
2965 | } | |
2966 | ||
072b91f9 BK |
2967 | /** |
2968 | * ibmvfc_show_log_level - Show the adapter's error logging level | |
2969 | * @dev: class device struct | |
2970 | * @buf: buffer | |
2971 | * | |
2972 | * Return value: | |
2973 | * number of bytes printed to buffer | |
2974 | **/ | |
2975 | static ssize_t ibmvfc_show_log_level(struct device *dev, | |
2976 | struct device_attribute *attr, char *buf) | |
2977 | { | |
2978 | struct Scsi_Host *shost = class_to_shost(dev); | |
2979 | struct ibmvfc_host *vhost = shost_priv(shost); | |
2980 | unsigned long flags = 0; | |
2981 | int len; | |
2982 | ||
2983 | spin_lock_irqsave(shost->host_lock, flags); | |
2984 | len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); | |
2985 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2986 | return len; | |
2987 | } | |
2988 | ||
2989 | /** | |
2990 | * ibmvfc_store_log_level - Change the adapter's error logging level | |
2991 | * @dev: class device struct | |
2992 | * @buf: buffer | |
2993 | * | |
2994 | * Return value: | |
2995 | * number of bytes printed to buffer | |
2996 | **/ | |
2997 | static ssize_t ibmvfc_store_log_level(struct device *dev, | |
2998 | struct device_attribute *attr, | |
2999 | const char *buf, size_t count) | |
3000 | { | |
3001 | struct Scsi_Host *shost = class_to_shost(dev); | |
3002 | struct ibmvfc_host *vhost = shost_priv(shost); | |
3003 | unsigned long flags = 0; | |
3004 | ||
3005 | spin_lock_irqsave(shost->host_lock, flags); | |
3006 | vhost->log_level = simple_strtoul(buf, NULL, 10); | |
3007 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3008 | return strlen(buf); | |
3009 | } | |
3010 | ||
85e2399e BK |
3011 | static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); |
3012 | static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); | |
3013 | static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); | |
3014 | static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); | |
3015 | static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); | |
497f9c50 | 3016 | static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); |
85e2399e BK |
3017 | static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, |
3018 | ibmvfc_show_log_level, ibmvfc_store_log_level); | |
072b91f9 BK |
3019 | |
3020 | #ifdef CONFIG_SCSI_IBMVFC_TRACE | |
3021 | /** | |
3022 | * ibmvfc_read_trace - Dump the adapter trace | |
2c3c8bea | 3023 | * @filp: open sysfs file |
072b91f9 BK |
3024 | * @kobj: kobject struct |
3025 | * @bin_attr: bin_attribute struct | |
3026 | * @buf: buffer | |
3027 | * @off: offset | |
3028 | * @count: buffer size | |
3029 | * | |
3030 | * Return value: | |
3031 | * number of bytes printed to buffer | |
3032 | **/ | |
2c3c8bea | 3033 | static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, |
072b91f9 BK |
3034 | struct bin_attribute *bin_attr, |
3035 | char *buf, loff_t off, size_t count) | |
3036 | { | |
3037 | struct device *dev = container_of(kobj, struct device, kobj); | |
3038 | struct Scsi_Host *shost = class_to_shost(dev); | |
3039 | struct ibmvfc_host *vhost = shost_priv(shost); | |
3040 | unsigned long flags = 0; | |
3041 | int size = IBMVFC_TRACE_SIZE; | |
3042 | char *src = (char *)vhost->trace; | |
3043 | ||
3044 | if (off > size) | |
3045 | return 0; | |
3046 | if (off + count > size) { | |
3047 | size -= off; | |
3048 | count = size; | |
3049 | } | |
3050 | ||
3051 | spin_lock_irqsave(shost->host_lock, flags); | |
3052 | memcpy(buf, &src[off], count); | |
3053 | spin_unlock_irqrestore(shost->host_lock, flags); | |
3054 | return count; | |
3055 | } | |
3056 | ||
3057 | static struct bin_attribute ibmvfc_trace_attr = { | |
3058 | .attr = { | |
3059 | .name = "trace", | |
3060 | .mode = S_IRUGO, | |
3061 | }, | |
3062 | .size = 0, | |
3063 | .read = ibmvfc_read_trace, | |
3064 | }; | |
3065 | #endif | |
3066 | ||
3067 | static struct device_attribute *ibmvfc_attrs[] = { | |
85e2399e BK |
3068 | &dev_attr_partition_name, |
3069 | &dev_attr_device_name, | |
3070 | &dev_attr_port_loc_code, | |
3071 | &dev_attr_drc_name, | |
3072 | &dev_attr_npiv_version, | |
497f9c50 | 3073 | &dev_attr_capabilities, |
85e2399e | 3074 | &dev_attr_log_level, |
072b91f9 BK |
3075 | NULL |
3076 | }; | |
3077 | ||
3078 | static struct scsi_host_template driver_template = { | |
3079 | .module = THIS_MODULE, | |
3080 | .name = "IBM POWER Virtual FC Adapter", | |
3081 | .proc_name = IBMVFC_NAME, | |
3082 | .queuecommand = ibmvfc_queuecommand, | |
3083 | .eh_abort_handler = ibmvfc_eh_abort_handler, | |
3084 | .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, | |
3085 | .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, | |
3086 | .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, | |
3087 | .slave_alloc = ibmvfc_slave_alloc, | |
3088 | .slave_configure = ibmvfc_slave_configure, | |
ad8dcffa | 3089 | .target_alloc = ibmvfc_target_alloc, |
072b91f9 BK |
3090 | .scan_finished = ibmvfc_scan_finished, |
3091 | .change_queue_depth = ibmvfc_change_queue_depth, | |
072b91f9 BK |
3092 | .cmd_per_lun = 16, |
3093 | .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, | |
3094 | .this_id = -1, | |
3095 | .sg_tablesize = SG_ALL, | |
3096 | .max_sectors = IBMVFC_MAX_SECTORS, | |
3097 | .use_clustering = ENABLE_CLUSTERING, | |
3098 | .shost_attrs = ibmvfc_attrs, | |
c40ecc12 | 3099 | .track_queue_depth = 1, |
072b91f9 BK |
3100 | }; |
3101 | ||
3102 | /** | |
3103 | * ibmvfc_next_async_crq - Returns the next entry in async queue | |
3104 | * @vhost: ibmvfc host struct | |
3105 | * | |
3106 | * Returns: | |
3107 | * Pointer to next entry in queue / NULL if empty | |
3108 | **/ | |
3109 | static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) | |
3110 | { | |
3111 | struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; | |
3112 | struct ibmvfc_async_crq *crq; | |
3113 | ||
3114 | crq = &async_crq->msgs[async_crq->cur]; | |
3115 | if (crq->valid & 0x80) { | |
3116 | if (++async_crq->cur == async_crq->size) | |
3117 | async_crq->cur = 0; | |
f5832fa2 | 3118 | rmb(); |
072b91f9 BK |
3119 | } else |
3120 | crq = NULL; | |
3121 | ||
3122 | return crq; | |
3123 | } | |
3124 | ||
3125 | /** | |
3126 | * ibmvfc_next_crq - Returns the next entry in message queue | |
3127 | * @vhost: ibmvfc host struct | |
3128 | * | |
3129 | * Returns: | |
3130 | * Pointer to next entry in queue / NULL if empty | |
3131 | **/ | |
3132 | static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) | |
3133 | { | |
3134 | struct ibmvfc_crq_queue *queue = &vhost->crq; | |
3135 | struct ibmvfc_crq *crq; | |
3136 | ||
3137 | crq = &queue->msgs[queue->cur]; | |
3138 | if (crq->valid & 0x80) { | |
3139 | if (++queue->cur == queue->size) | |
3140 | queue->cur = 0; | |
f5832fa2 | 3141 | rmb(); |
072b91f9 BK |
3142 | } else |
3143 | crq = NULL; | |
3144 | ||
3145 | return crq; | |
3146 | } | |
3147 | ||
3148 | /** | |
3149 | * ibmvfc_interrupt - Interrupt handler | |
3150 | * @irq: number of irq to handle, not used | |
3151 | * @dev_instance: ibmvfc_host that received interrupt | |
3152 | * | |
3153 | * Returns: | |
3154 | * IRQ_HANDLED | |
3155 | **/ | |
3156 | static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) | |
3157 | { | |
3158 | struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; | |
039a0898 BK |
3159 | unsigned long flags; |
3160 | ||
3161 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3162 | vio_disable_interrupts(to_vio_dev(vhost->dev)); | |
3163 | tasklet_schedule(&vhost->tasklet); | |
3164 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3165 | return IRQ_HANDLED; | |
3166 | } | |
3167 | ||
3168 | /** | |
3169 | * ibmvfc_tasklet - Interrupt handler tasklet | |
3170 | * @data: ibmvfc host struct | |
3171 | * | |
3172 | * Returns: | |
3173 | * Nothing | |
3174 | **/ | |
3175 | static void ibmvfc_tasklet(void *data) | |
3176 | { | |
3177 | struct ibmvfc_host *vhost = data; | |
072b91f9 BK |
3178 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
3179 | struct ibmvfc_crq *crq; | |
3180 | struct ibmvfc_async_crq *async; | |
3181 | unsigned long flags; | |
3182 | int done = 0; | |
3183 | ||
3184 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
072b91f9 | 3185 | while (!done) { |
072b91f9 BK |
3186 | /* Pull all the valid messages off the async CRQ */ |
3187 | while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { | |
3188 | ibmvfc_handle_async(async, vhost); | |
3189 | async->valid = 0; | |
f5832fa2 | 3190 | wmb(); |
072b91f9 BK |
3191 | } |
3192 | ||
f1d7fb7a BK |
3193 | /* Pull all the valid messages off the CRQ */ |
3194 | while ((crq = ibmvfc_next_crq(vhost)) != NULL) { | |
072b91f9 BK |
3195 | ibmvfc_handle_crq(crq, vhost); |
3196 | crq->valid = 0; | |
f5832fa2 | 3197 | wmb(); |
f1d7fb7a BK |
3198 | } |
3199 | ||
3200 | vio_enable_interrupts(vdev); | |
3201 | if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { | |
072b91f9 BK |
3202 | vio_disable_interrupts(vdev); |
3203 | ibmvfc_handle_async(async, vhost); | |
4081b77c | 3204 | async->valid = 0; |
f5832fa2 | 3205 | wmb(); |
f1d7fb7a BK |
3206 | } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { |
3207 | vio_disable_interrupts(vdev); | |
3208 | ibmvfc_handle_crq(crq, vhost); | |
3209 | crq->valid = 0; | |
f5832fa2 | 3210 | wmb(); |
072b91f9 BK |
3211 | } else |
3212 | done = 1; | |
3213 | } | |
3214 | ||
3215 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
072b91f9 BK |
3216 | } |
3217 | ||
3218 | /** | |
3219 | * ibmvfc_init_tgt - Set the next init job step for the target | |
3220 | * @tgt: ibmvfc target struct | |
3221 | * @job_step: job step to perform | |
3222 | * | |
3223 | **/ | |
3224 | static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, | |
3225 | void (*job_step) (struct ibmvfc_target *)) | |
3226 | { | |
3227 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); | |
3228 | tgt->job_step = job_step; | |
3229 | wake_up(&tgt->vhost->work_wait_q); | |
3230 | } | |
3231 | ||
3232 | /** | |
3233 | * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization | |
3234 | * @tgt: ibmvfc target struct | |
3235 | * @job_step: initialization job step | |
3236 | * | |
7d0e4622 BK |
3237 | * Returns: 1 if step will be retried / 0 if not |
3238 | * | |
072b91f9 | 3239 | **/ |
7d0e4622 | 3240 | static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, |
072b91f9 BK |
3241 | void (*job_step) (struct ibmvfc_target *)) |
3242 | { | |
1c41fa82 | 3243 | if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { |
072b91f9 BK |
3244 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
3245 | wake_up(&tgt->vhost->work_wait_q); | |
7d0e4622 | 3246 | return 0; |
072b91f9 BK |
3247 | } else |
3248 | ibmvfc_init_tgt(tgt, job_step); | |
7d0e4622 | 3249 | return 1; |
072b91f9 BK |
3250 | } |
3251 | ||
a3b7aeab BK |
3252 | /* Defined in FC-LS */ |
3253 | static const struct { | |
3254 | int code; | |
3255 | int retry; | |
3256 | int logged_in; | |
3257 | } prli_rsp [] = { | |
3258 | { 0, 1, 0 }, | |
3259 | { 1, 0, 1 }, | |
3260 | { 2, 1, 0 }, | |
3261 | { 3, 1, 0 }, | |
3262 | { 4, 0, 0 }, | |
3263 | { 5, 0, 0 }, | |
3264 | { 6, 0, 1 }, | |
3265 | { 7, 0, 0 }, | |
3266 | { 8, 1, 0 }, | |
3267 | }; | |
3268 | ||
3269 | /** | |
3270 | * ibmvfc_get_prli_rsp - Find PRLI response index | |
3271 | * @flags: PRLI response flags | |
3272 | * | |
3273 | **/ | |
3274 | static int ibmvfc_get_prli_rsp(u16 flags) | |
3275 | { | |
3276 | int i; | |
3277 | int code = (flags & 0x0f00) >> 8; | |
3278 | ||
3279 | for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) | |
3280 | if (prli_rsp[i].code == code) | |
3281 | return i; | |
3282 | ||
3283 | return 0; | |
3284 | } | |
3285 | ||
072b91f9 BK |
3286 | /** |
3287 | * ibmvfc_tgt_prli_done - Completion handler for Process Login | |
3288 | * @evt: ibmvfc event struct | |
3289 | * | |
3290 | **/ | |
3291 | static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) | |
3292 | { | |
3293 | struct ibmvfc_target *tgt = evt->tgt; | |
3294 | struct ibmvfc_host *vhost = evt->vhost; | |
3295 | struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; | |
a3b7aeab | 3296 | struct ibmvfc_prli_svc_parms *parms = &rsp->parms; |
0aab6c3f | 3297 | u32 status = be16_to_cpu(rsp->common.status); |
7d0e4622 | 3298 | int index, level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
3299 | |
3300 | vhost->discovery_threads--; | |
3301 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3302 | switch (status) { | |
3303 | case IBMVFC_MAD_SUCCESS: | |
a3b7aeab BK |
3304 | tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", |
3305 | parms->type, parms->flags, parms->service_parms); | |
3306 | ||
3307 | if (parms->type == IBMVFC_SCSI_FCP_TYPE) { | |
0aab6c3f | 3308 | index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); |
a3b7aeab | 3309 | if (prli_rsp[index].logged_in) { |
0aab6c3f | 3310 | if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { |
a3b7aeab BK |
3311 | tgt->need_login = 0; |
3312 | tgt->ids.roles = 0; | |
0aab6c3f | 3313 | if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) |
a3b7aeab | 3314 | tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; |
0aab6c3f | 3315 | if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) |
a3b7aeab | 3316 | tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; |
43c8da90 | 3317 | tgt->add_rport = 1; |
a3b7aeab BK |
3318 | } else |
3319 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
3320 | } else if (prli_rsp[index].retry) | |
3321 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); | |
3322 | else | |
3323 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
3324 | } else | |
3325 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
072b91f9 BK |
3326 | break; |
3327 | case IBMVFC_MAD_DRIVER_FAILED: | |
3328 | break; | |
3329 | case IBMVFC_MAD_CRQ_ERROR: | |
3330 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); | |
3331 | break; | |
3332 | case IBMVFC_MAD_FAILED: | |
3333 | default: | |
0aab6c3f TD |
3334 | if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && |
3335 | be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) | |
017b2ae3 BK |
3336 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
3337 | else if (tgt->logo_rcvd) | |
3338 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); | |
0aab6c3f | 3339 | else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) |
7d0e4622 | 3340 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); |
10e79499 BK |
3341 | else |
3342 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
7d0e4622 BK |
3343 | |
3344 | tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", | |
0aab6c3f | 3345 | ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), |
7d0e4622 | 3346 | rsp->status, rsp->error, status); |
072b91f9 BK |
3347 | break; |
3348 | }; | |
3349 | ||
3350 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3351 | ibmvfc_free_event(evt); | |
3352 | wake_up(&vhost->work_wait_q); | |
3353 | } | |
3354 | ||
3355 | /** | |
3356 | * ibmvfc_tgt_send_prli - Send a process login | |
3357 | * @tgt: ibmvfc target struct | |
3358 | * | |
3359 | **/ | |
3360 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) | |
3361 | { | |
3362 | struct ibmvfc_process_login *prli; | |
3363 | struct ibmvfc_host *vhost = tgt->vhost; | |
3364 | struct ibmvfc_event *evt; | |
3365 | ||
3366 | if (vhost->discovery_threads >= disc_threads) | |
3367 | return; | |
3368 | ||
3369 | kref_get(&tgt->kref); | |
3370 | evt = ibmvfc_get_event(vhost); | |
3371 | vhost->discovery_threads++; | |
3372 | ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); | |
3373 | evt->tgt = tgt; | |
3374 | prli = &evt->iu.prli; | |
3375 | memset(prli, 0, sizeof(*prli)); | |
0aab6c3f TD |
3376 | prli->common.version = cpu_to_be32(1); |
3377 | prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); | |
3378 | prli->common.length = cpu_to_be16(sizeof(*prli)); | |
3379 | prli->scsi_id = cpu_to_be64(tgt->scsi_id); | |
072b91f9 BK |
3380 | |
3381 | prli->parms.type = IBMVFC_SCSI_FCP_TYPE; | |
0aab6c3f TD |
3382 | prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); |
3383 | prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); | |
072b91f9 BK |
3384 | |
3385 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
3386 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3387 | vhost->discovery_threads--; | |
3388 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3389 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3390 | } else | |
3391 | tgt_dbg(tgt, "Sent process login\n"); | |
3392 | } | |
3393 | ||
3394 | /** | |
3395 | * ibmvfc_tgt_plogi_done - Completion handler for Port Login | |
3396 | * @evt: ibmvfc event struct | |
3397 | * | |
3398 | **/ | |
3399 | static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) | |
3400 | { | |
3401 | struct ibmvfc_target *tgt = evt->tgt; | |
3402 | struct ibmvfc_host *vhost = evt->vhost; | |
3403 | struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; | |
0aab6c3f | 3404 | u32 status = be16_to_cpu(rsp->common.status); |
7d0e4622 | 3405 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
3406 | |
3407 | vhost->discovery_threads--; | |
3408 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3409 | switch (status) { | |
3410 | case IBMVFC_MAD_SUCCESS: | |
3411 | tgt_dbg(tgt, "Port Login succeeded\n"); | |
3412 | if (tgt->ids.port_name && | |
3413 | tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { | |
3414 | vhost->reinit = 1; | |
3415 | tgt_dbg(tgt, "Port re-init required\n"); | |
3416 | break; | |
3417 | } | |
3418 | tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); | |
3419 | tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); | |
3420 | tgt->ids.port_id = tgt->scsi_id; | |
072b91f9 BK |
3421 | memcpy(&tgt->service_parms, &rsp->service_parms, |
3422 | sizeof(tgt->service_parms)); | |
3423 | memcpy(&tgt->service_parms_change, &rsp->service_parms_change, | |
3424 | sizeof(tgt->service_parms_change)); | |
3425 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); | |
3426 | break; | |
3427 | case IBMVFC_MAD_DRIVER_FAILED: | |
3428 | break; | |
3429 | case IBMVFC_MAD_CRQ_ERROR: | |
3430 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); | |
3431 | break; | |
3432 | case IBMVFC_MAD_FAILED: | |
3433 | default: | |
0aab6c3f | 3434 | if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) |
7d0e4622 | 3435 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
10e79499 BK |
3436 | else |
3437 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
7d0e4622 BK |
3438 | |
3439 | tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", | |
0aab6c3f TD |
3440 | ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), rsp->status, rsp->error, |
3441 | ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), rsp->fc_type, | |
3442 | ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), rsp->fc_explain, status); | |
072b91f9 BK |
3443 | break; |
3444 | }; | |
3445 | ||
3446 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3447 | ibmvfc_free_event(evt); | |
3448 | wake_up(&vhost->work_wait_q); | |
3449 | } | |
3450 | ||
3451 | /** | |
3452 | * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target | |
3453 | * @tgt: ibmvfc target struct | |
3454 | * | |
3455 | **/ | |
3456 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) | |
3457 | { | |
3458 | struct ibmvfc_port_login *plogi; | |
3459 | struct ibmvfc_host *vhost = tgt->vhost; | |
3460 | struct ibmvfc_event *evt; | |
3461 | ||
3462 | if (vhost->discovery_threads >= disc_threads) | |
3463 | return; | |
3464 | ||
3465 | kref_get(&tgt->kref); | |
017b2ae3 | 3466 | tgt->logo_rcvd = 0; |
072b91f9 BK |
3467 | evt = ibmvfc_get_event(vhost); |
3468 | vhost->discovery_threads++; | |
3469 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
3470 | ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); | |
3471 | evt->tgt = tgt; | |
3472 | plogi = &evt->iu.plogi; | |
3473 | memset(plogi, 0, sizeof(*plogi)); | |
0aab6c3f TD |
3474 | plogi->common.version = cpu_to_be32(1); |
3475 | plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); | |
3476 | plogi->common.length = cpu_to_be16(sizeof(*plogi)); | |
3477 | plogi->scsi_id = cpu_to_be64(tgt->scsi_id); | |
072b91f9 BK |
3478 | |
3479 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3480 | vhost->discovery_threads--; | |
3481 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3482 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3483 | } else | |
3484 | tgt_dbg(tgt, "Sent port login\n"); | |
3485 | } | |
3486 | ||
3487 | /** | |
3488 | * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD | |
3489 | * @evt: ibmvfc event struct | |
3490 | * | |
3491 | **/ | |
3492 | static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) | |
3493 | { | |
3494 | struct ibmvfc_target *tgt = evt->tgt; | |
3495 | struct ibmvfc_host *vhost = evt->vhost; | |
3496 | struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; | |
0aab6c3f | 3497 | u32 status = be16_to_cpu(rsp->common.status); |
072b91f9 BK |
3498 | |
3499 | vhost->discovery_threads--; | |
3500 | ibmvfc_free_event(evt); | |
3501 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3502 | ||
3503 | switch (status) { | |
3504 | case IBMVFC_MAD_SUCCESS: | |
3505 | tgt_dbg(tgt, "Implicit Logout succeeded\n"); | |
3506 | break; | |
3507 | case IBMVFC_MAD_DRIVER_FAILED: | |
3508 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3509 | wake_up(&vhost->work_wait_q); | |
3510 | return; | |
3511 | case IBMVFC_MAD_FAILED: | |
3512 | default: | |
3513 | tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); | |
3514 | break; | |
3515 | }; | |
3516 | ||
3517 | if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) | |
3518 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); | |
3519 | else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && | |
3520 | tgt->scsi_id != tgt->new_scsi_id) | |
3521 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
3522 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3523 | wake_up(&vhost->work_wait_q); | |
3524 | } | |
3525 | ||
3526 | /** | |
3527 | * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target | |
3528 | * @tgt: ibmvfc target struct | |
3529 | * | |
3530 | **/ | |
3531 | static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) | |
3532 | { | |
3533 | struct ibmvfc_implicit_logout *mad; | |
3534 | struct ibmvfc_host *vhost = tgt->vhost; | |
3535 | struct ibmvfc_event *evt; | |
3536 | ||
3537 | if (vhost->discovery_threads >= disc_threads) | |
3538 | return; | |
3539 | ||
3540 | kref_get(&tgt->kref); | |
3541 | evt = ibmvfc_get_event(vhost); | |
3542 | vhost->discovery_threads++; | |
3543 | ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); | |
3544 | evt->tgt = tgt; | |
3545 | mad = &evt->iu.implicit_logout; | |
3546 | memset(mad, 0, sizeof(*mad)); | |
0aab6c3f TD |
3547 | mad->common.version = cpu_to_be32(1); |
3548 | mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); | |
3549 | mad->common.length = cpu_to_be16(sizeof(*mad)); | |
3550 | mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); | |
072b91f9 BK |
3551 | |
3552 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
3553 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3554 | vhost->discovery_threads--; | |
3555 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3556 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3557 | } else | |
3558 | tgt_dbg(tgt, "Sent Implicit Logout\n"); | |
3559 | } | |
3560 | ||
989b8545 BK |
3561 | /** |
3562 | * ibmvfc_adisc_needs_plogi - Does device need PLOGI? | |
3563 | * @mad: ibmvfc passthru mad struct | |
3564 | * @tgt: ibmvfc target struct | |
3565 | * | |
3566 | * Returns: | |
3567 | * 1 if PLOGI needed / 0 if PLOGI not needed | |
3568 | **/ | |
3569 | static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, | |
3570 | struct ibmvfc_target *tgt) | |
3571 | { | |
3572 | if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, | |
3573 | sizeof(tgt->ids.port_name))) | |
3574 | return 1; | |
3575 | if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, | |
3576 | sizeof(tgt->ids.node_name))) | |
3577 | return 1; | |
0aab6c3f | 3578 | if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) |
989b8545 BK |
3579 | return 1; |
3580 | return 0; | |
3581 | } | |
3582 | ||
3583 | /** | |
3584 | * ibmvfc_tgt_adisc_done - Completion handler for ADISC | |
3585 | * @evt: ibmvfc event struct | |
3586 | * | |
3587 | **/ | |
3588 | static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) | |
3589 | { | |
3590 | struct ibmvfc_target *tgt = evt->tgt; | |
3591 | struct ibmvfc_host *vhost = evt->vhost; | |
3592 | struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; | |
0aab6c3f | 3593 | u32 status = be16_to_cpu(mad->common.status); |
989b8545 BK |
3594 | u8 fc_reason, fc_explain; |
3595 | ||
3596 | vhost->discovery_threads--; | |
3597 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
10501e1c | 3598 | del_timer(&tgt->timer); |
989b8545 BK |
3599 | |
3600 | switch (status) { | |
3601 | case IBMVFC_MAD_SUCCESS: | |
3602 | tgt_dbg(tgt, "ADISC succeeded\n"); | |
3603 | if (ibmvfc_adisc_needs_plogi(mad, tgt)) | |
5e47167b | 3604 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
989b8545 BK |
3605 | break; |
3606 | case IBMVFC_MAD_DRIVER_FAILED: | |
3607 | break; | |
3608 | case IBMVFC_MAD_FAILED: | |
3609 | default: | |
5e47167b | 3610 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
0aab6c3f TD |
3611 | fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; |
3612 | fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; | |
989b8545 | 3613 | tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
0aab6c3f | 3614 | ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), |
989b8545 BK |
3615 | mad->iu.status, mad->iu.error, |
3616 | ibmvfc_get_fc_type(fc_reason), fc_reason, | |
3617 | ibmvfc_get_ls_explain(fc_explain), fc_explain, status); | |
3618 | break; | |
3619 | }; | |
3620 | ||
3621 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3622 | ibmvfc_free_event(evt); | |
3623 | wake_up(&vhost->work_wait_q); | |
3624 | } | |
3625 | ||
3626 | /** | |
3627 | * ibmvfc_init_passthru - Initialize an event struct for FC passthru | |
3628 | * @evt: ibmvfc event struct | |
3629 | * | |
3630 | **/ | |
3631 | static void ibmvfc_init_passthru(struct ibmvfc_event *evt) | |
3632 | { | |
3633 | struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; | |
3634 | ||
3635 | memset(mad, 0, sizeof(*mad)); | |
0aab6c3f TD |
3636 | mad->common.version = cpu_to_be32(1); |
3637 | mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); | |
3638 | mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); | |
3639 | mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + | |
3640 | offsetof(struct ibmvfc_passthru_mad, iu)); | |
3641 | mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); | |
3642 | mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); | |
3643 | mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); | |
3644 | mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + | |
989b8545 | 3645 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + |
0aab6c3f TD |
3646 | offsetof(struct ibmvfc_passthru_fc_iu, payload)); |
3647 | mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); | |
3648 | mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + | |
989b8545 | 3649 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + |
0aab6c3f TD |
3650 | offsetof(struct ibmvfc_passthru_fc_iu, response)); |
3651 | mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); | |
989b8545 BK |
3652 | } |
3653 | ||
10501e1c BK |
3654 | /** |
3655 | * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC | |
3656 | * @evt: ibmvfc event struct | |
3657 | * | |
3658 | * Just cleanup this event struct. Everything else is handled by | |
3659 | * the ADISC completion handler. If the ADISC never actually comes | |
3660 | * back, we still have the timer running on the ADISC event struct | |
3661 | * which will fire and cause the CRQ to get reset. | |
3662 | * | |
3663 | **/ | |
3664 | static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) | |
3665 | { | |
3666 | struct ibmvfc_host *vhost = evt->vhost; | |
3667 | struct ibmvfc_target *tgt = evt->tgt; | |
3668 | ||
3669 | tgt_dbg(tgt, "ADISC cancel complete\n"); | |
3670 | vhost->abort_threads--; | |
3671 | ibmvfc_free_event(evt); | |
3672 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3673 | wake_up(&vhost->work_wait_q); | |
3674 | } | |
3675 | ||
3676 | /** | |
3677 | * ibmvfc_adisc_timeout - Handle an ADISC timeout | |
3678 | * @tgt: ibmvfc target struct | |
3679 | * | |
3680 | * If an ADISC times out, send a cancel. If the cancel times | |
3681 | * out, reset the CRQ. When the ADISC comes back as cancelled, | |
3682 | * log back into the target. | |
3683 | **/ | |
3684 | static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) | |
3685 | { | |
3686 | struct ibmvfc_host *vhost = tgt->vhost; | |
3687 | struct ibmvfc_event *evt; | |
3688 | struct ibmvfc_tmf *tmf; | |
3689 | unsigned long flags; | |
3690 | int rc; | |
3691 | ||
3692 | tgt_dbg(tgt, "ADISC timeout\n"); | |
3693 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3694 | if (vhost->abort_threads >= disc_threads || | |
3695 | tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || | |
3696 | vhost->state != IBMVFC_INITIALIZING || | |
3697 | vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { | |
3698 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3699 | return; | |
3700 | } | |
3701 | ||
3702 | vhost->abort_threads++; | |
3703 | kref_get(&tgt->kref); | |
3704 | evt = ibmvfc_get_event(vhost); | |
3705 | ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); | |
3706 | ||
3707 | evt->tgt = tgt; | |
3708 | tmf = &evt->iu.tmf; | |
3709 | memset(tmf, 0, sizeof(*tmf)); | |
0aab6c3f TD |
3710 | tmf->common.version = cpu_to_be32(1); |
3711 | tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); | |
3712 | tmf->common.length = cpu_to_be16(sizeof(*tmf)); | |
3713 | tmf->scsi_id = cpu_to_be64(tgt->scsi_id); | |
3714 | tmf->cancel_key = cpu_to_be32(tgt->cancel_key); | |
10501e1c BK |
3715 | |
3716 | rc = ibmvfc_send_event(evt, vhost, default_timeout); | |
3717 | ||
3718 | if (rc) { | |
3719 | tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); | |
3720 | vhost->abort_threads--; | |
3721 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3722 | __ibmvfc_reset_host(vhost); | |
3723 | } else | |
3724 | tgt_dbg(tgt, "Attempting to cancel ADISC\n"); | |
3725 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3726 | } | |
3727 | ||
989b8545 BK |
3728 | /** |
3729 | * ibmvfc_tgt_adisc - Initiate an ADISC for specified target | |
3730 | * @tgt: ibmvfc target struct | |
3731 | * | |
10501e1c BK |
3732 | * When sending an ADISC we end up with two timers running. The |
3733 | * first timer is the timer in the ibmvfc target struct. If this | |
3734 | * fires, we send a cancel to the target. The second timer is the | |
3735 | * timer on the ibmvfc event for the ADISC, which is longer. If that | |
3736 | * fires, it means the ADISC timed out and our attempt to cancel it | |
3737 | * also failed, so we need to reset the CRQ. | |
989b8545 BK |
3738 | **/ |
3739 | static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) | |
3740 | { | |
3741 | struct ibmvfc_passthru_mad *mad; | |
3742 | struct ibmvfc_host *vhost = tgt->vhost; | |
3743 | struct ibmvfc_event *evt; | |
3744 | ||
3745 | if (vhost->discovery_threads >= disc_threads) | |
3746 | return; | |
3747 | ||
3748 | kref_get(&tgt->kref); | |
3749 | evt = ibmvfc_get_event(vhost); | |
3750 | vhost->discovery_threads++; | |
3751 | ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); | |
3752 | evt->tgt = tgt; | |
3753 | ||
3754 | ibmvfc_init_passthru(evt); | |
3755 | mad = &evt->iu.passthru; | |
0aab6c3f TD |
3756 | mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); |
3757 | mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); | |
3758 | mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); | |
989b8545 | 3759 | |
0aab6c3f | 3760 | mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); |
989b8545 BK |
3761 | memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, |
3762 | sizeof(vhost->login_buf->resp.port_name)); | |
3763 | memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, | |
3764 | sizeof(vhost->login_buf->resp.node_name)); | |
0aab6c3f | 3765 | mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); |
989b8545 | 3766 | |
10501e1c BK |
3767 | if (timer_pending(&tgt->timer)) |
3768 | mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); | |
3769 | else { | |
3770 | tgt->timer.data = (unsigned long) tgt; | |
3771 | tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); | |
3772 | tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; | |
3773 | add_timer(&tgt->timer); | |
3774 | } | |
3775 | ||
989b8545 | 3776 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
10501e1c | 3777 | if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { |
989b8545 | 3778 | vhost->discovery_threads--; |
10501e1c | 3779 | del_timer(&tgt->timer); |
989b8545 BK |
3780 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
3781 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3782 | } else | |
3783 | tgt_dbg(tgt, "Sent ADISC\n"); | |
3784 | } | |
3785 | ||
072b91f9 BK |
3786 | /** |
3787 | * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD | |
3788 | * @evt: ibmvfc event struct | |
3789 | * | |
3790 | **/ | |
3791 | static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) | |
3792 | { | |
3793 | struct ibmvfc_target *tgt = evt->tgt; | |
3794 | struct ibmvfc_host *vhost = evt->vhost; | |
3795 | struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; | |
0aab6c3f | 3796 | u32 status = be16_to_cpu(rsp->common.status); |
7d0e4622 | 3797 | int level = IBMVFC_DEFAULT_LOG_LEVEL; |
072b91f9 BK |
3798 | |
3799 | vhost->discovery_threads--; | |
3800 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3801 | switch (status) { | |
3802 | case IBMVFC_MAD_SUCCESS: | |
3803 | tgt_dbg(tgt, "Query Target succeeded\n"); | |
0aab6c3f TD |
3804 | tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id); |
3805 | if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) | |
072b91f9 | 3806 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); |
989b8545 BK |
3807 | else |
3808 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); | |
072b91f9 BK |
3809 | break; |
3810 | case IBMVFC_MAD_DRIVER_FAILED: | |
3811 | break; | |
3812 | case IBMVFC_MAD_CRQ_ERROR: | |
3813 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); | |
3814 | break; | |
3815 | case IBMVFC_MAD_FAILED: | |
3816 | default: | |
0aab6c3f TD |
3817 | if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && |
3818 | be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && | |
3819 | be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) | |
072b91f9 | 3820 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
0aab6c3f | 3821 | else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) |
7d0e4622 | 3822 | level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); |
10e79499 BK |
3823 | else |
3824 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); | |
7d0e4622 BK |
3825 | |
3826 | tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", | |
0aab6c3f TD |
3827 | ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), |
3828 | rsp->status, rsp->error, ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), | |
3829 | rsp->fc_type, ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), | |
3830 | rsp->fc_explain, status); | |
072b91f9 BK |
3831 | break; |
3832 | }; | |
3833 | ||
3834 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3835 | ibmvfc_free_event(evt); | |
3836 | wake_up(&vhost->work_wait_q); | |
3837 | } | |
3838 | ||
3839 | /** | |
3840 | * ibmvfc_tgt_query_target - Initiate a Query Target for specified target | |
3841 | * @tgt: ibmvfc target struct | |
3842 | * | |
3843 | **/ | |
3844 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) | |
3845 | { | |
3846 | struct ibmvfc_query_tgt *query_tgt; | |
3847 | struct ibmvfc_host *vhost = tgt->vhost; | |
3848 | struct ibmvfc_event *evt; | |
3849 | ||
3850 | if (vhost->discovery_threads >= disc_threads) | |
3851 | return; | |
3852 | ||
3853 | kref_get(&tgt->kref); | |
3854 | evt = ibmvfc_get_event(vhost); | |
3855 | vhost->discovery_threads++; | |
3856 | evt->tgt = tgt; | |
3857 | ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); | |
3858 | query_tgt = &evt->iu.query_tgt; | |
3859 | memset(query_tgt, 0, sizeof(*query_tgt)); | |
0aab6c3f TD |
3860 | query_tgt->common.version = cpu_to_be32(1); |
3861 | query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); | |
3862 | query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); | |
3863 | query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); | |
072b91f9 BK |
3864 | |
3865 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); | |
3866 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { | |
3867 | vhost->discovery_threads--; | |
3868 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); | |
3869 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
3870 | } else | |
3871 | tgt_dbg(tgt, "Sent Query Target\n"); | |
3872 | } | |
3873 | ||
3874 | /** | |
3875 | * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target | |
3876 | * @vhost: ibmvfc host struct | |
3877 | * @scsi_id: SCSI ID to allocate target for | |
3878 | * | |
3879 | * Returns: | |
3880 | * 0 on success / other on failure | |
3881 | **/ | |
3882 | static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) | |
3883 | { | |
3884 | struct ibmvfc_target *tgt; | |
3885 | unsigned long flags; | |
3886 | ||
3887 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
3888 | list_for_each_entry(tgt, &vhost->targets, queue) { | |
3889 | if (tgt->scsi_id == scsi_id) { | |
3890 | if (tgt->need_login) | |
3891 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); | |
3892 | goto unlock_out; | |
3893 | } | |
3894 | } | |
3895 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
3896 | ||
7270b9bd | 3897 | tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); |
072b91f9 | 3898 | if (!tgt) { |
775a42ec | 3899 | dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", |
072b91f9 BK |
3900 | scsi_id); |
3901 | return -ENOMEM; | |
3902 | } | |
3903 | ||
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 BK |
3909 | tgt->cancel_key = vhost->task_set++; |
3910 | init_timer(&tgt->timer); | |
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; | |
4236 | }; | |
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; | |
4464 | }; | |
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); | |
4725 | } | |
4726 | ||
4727 | kref_put(&tgt->kref, ibmvfc_release_tgt); | |
4728 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4729 | break; | |
4730 | } | |
4731 | } | |
4732 | } while(did_work); | |
4733 | ||
4734 | if (vhost->state == IBMVFC_ACTIVE) | |
4735 | vhost->scan_complete = 1; | |
4736 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4737 | LEAVE; | |
4738 | } | |
4739 | ||
072b91f9 BK |
4740 | /** |
4741 | * ibmvfc_probe - Adapter hot plug add entry point | |
4742 | * @vdev: vio device struct | |
4743 | * @id: vio device id struct | |
4744 | * | |
4745 | * Return value: | |
4746 | * 0 on success / non-zero on failure | |
4747 | **/ | |
4748 | static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) | |
4749 | { | |
4750 | struct ibmvfc_host *vhost; | |
4751 | struct Scsi_Host *shost; | |
4752 | struct device *dev = &vdev->dev; | |
4753 | int rc = -ENOMEM; | |
4754 | ||
4755 | ENTER; | |
4756 | shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); | |
4757 | if (!shost) { | |
4758 | dev_err(dev, "Couldn't allocate host data\n"); | |
4759 | goto out; | |
4760 | } | |
4761 | ||
4762 | shost->transportt = ibmvfc_transport_template; | |
4763 | shost->can_queue = max_requests; | |
4764 | shost->max_lun = max_lun; | |
4765 | shost->max_id = max_targets; | |
4766 | shost->max_sectors = IBMVFC_MAX_SECTORS; | |
4767 | shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; | |
4768 | shost->unique_id = shost->host_no; | |
4769 | ||
4770 | vhost = shost_priv(shost); | |
4771 | INIT_LIST_HEAD(&vhost->sent); | |
4772 | INIT_LIST_HEAD(&vhost->free); | |
4773 | INIT_LIST_HEAD(&vhost->targets); | |
4774 | sprintf(vhost->name, IBMVFC_NAME); | |
4775 | vhost->host = shost; | |
4776 | vhost->dev = dev; | |
4777 | vhost->partition_number = -1; | |
4778 | vhost->log_level = log_level; | |
10501e1c | 4779 | vhost->task_set = 1; |
072b91f9 BK |
4780 | strcpy(vhost->partition_name, "UNKNOWN"); |
4781 | init_waitqueue_head(&vhost->work_wait_q); | |
4782 | init_waitqueue_head(&vhost->init_wait_q); | |
43c8da90 | 4783 | INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); |
d31429e1 | 4784 | mutex_init(&vhost->passthru_mutex); |
072b91f9 BK |
4785 | |
4786 | if ((rc = ibmvfc_alloc_mem(vhost))) | |
4787 | goto free_scsi_host; | |
4788 | ||
4789 | vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, | |
4790 | shost->host_no); | |
4791 | ||
4792 | if (IS_ERR(vhost->work_thread)) { | |
4793 | dev_err(dev, "Couldn't create kernel thread: %ld\n", | |
4794 | PTR_ERR(vhost->work_thread)); | |
4795 | goto free_host_mem; | |
4796 | } | |
4797 | ||
4798 | if ((rc = ibmvfc_init_crq(vhost))) { | |
4799 | dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); | |
4800 | goto kill_kthread; | |
4801 | } | |
4802 | ||
4803 | if ((rc = ibmvfc_init_event_pool(vhost))) { | |
4804 | dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); | |
4805 | goto release_crq; | |
4806 | } | |
4807 | ||
4808 | if ((rc = scsi_add_host(shost, dev))) | |
4809 | goto release_event_pool; | |
4810 | ||
a5110f29 MC |
4811 | fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; |
4812 | ||
072b91f9 BK |
4813 | if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, |
4814 | &ibmvfc_trace_attr))) { | |
4815 | dev_err(dev, "Failed to create trace file. rc=%d\n", rc); | |
4816 | goto remove_shost; | |
4817 | } | |
4818 | ||
d31429e1 | 4819 | if (shost_to_fc_host(shost)->rqst_q) |
8a78362c | 4820 | blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); |
072b91f9 BK |
4821 | dev_set_drvdata(dev, vhost); |
4822 | spin_lock(&ibmvfc_driver_lock); | |
4823 | list_add_tail(&vhost->queue, &ibmvfc_head); | |
4824 | spin_unlock(&ibmvfc_driver_lock); | |
4825 | ||
4826 | ibmvfc_send_crq_init(vhost); | |
4827 | scsi_scan_host(shost); | |
4828 | return 0; | |
4829 | ||
4830 | remove_shost: | |
4831 | scsi_remove_host(shost); | |
4832 | release_event_pool: | |
4833 | ibmvfc_free_event_pool(vhost); | |
4834 | release_crq: | |
4835 | ibmvfc_release_crq_queue(vhost); | |
4836 | kill_kthread: | |
4837 | kthread_stop(vhost->work_thread); | |
4838 | free_host_mem: | |
4839 | ibmvfc_free_mem(vhost); | |
4840 | free_scsi_host: | |
4841 | scsi_host_put(shost); | |
4842 | out: | |
4843 | LEAVE; | |
4844 | return rc; | |
4845 | } | |
4846 | ||
4847 | /** | |
4848 | * ibmvfc_remove - Adapter hot plug remove entry point | |
4849 | * @vdev: vio device struct | |
4850 | * | |
4851 | * Return value: | |
4852 | * 0 | |
4853 | **/ | |
4854 | static int ibmvfc_remove(struct vio_dev *vdev) | |
4855 | { | |
4856 | struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); | |
4857 | unsigned long flags; | |
4858 | ||
4859 | ENTER; | |
4860 | ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); | |
70431105 BK |
4861 | |
4862 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
2d0da2a4 | 4863 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
70431105 BK |
4864 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
4865 | ||
2d0da2a4 BK |
4866 | ibmvfc_wait_while_resetting(vhost); |
4867 | ibmvfc_release_crq_queue(vhost); | |
072b91f9 BK |
4868 | kthread_stop(vhost->work_thread); |
4869 | fc_remove_host(vhost->host); | |
4870 | scsi_remove_host(vhost->host); | |
072b91f9 BK |
4871 | |
4872 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4873 | ibmvfc_purge_requests(vhost, DID_ERROR); | |
4874 | ibmvfc_free_event_pool(vhost); | |
4875 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4876 | ||
4877 | ibmvfc_free_mem(vhost); | |
4878 | spin_lock(&ibmvfc_driver_lock); | |
4879 | list_del(&vhost->queue); | |
4880 | spin_unlock(&ibmvfc_driver_lock); | |
4881 | scsi_host_put(vhost->host); | |
4882 | LEAVE; | |
4883 | return 0; | |
4884 | } | |
4885 | ||
b0f4d4cf BK |
4886 | /** |
4887 | * ibmvfc_resume - Resume from suspend | |
4888 | * @dev: device struct | |
4889 | * | |
4890 | * We may have lost an interrupt across suspend/resume, so kick the | |
4891 | * interrupt handler | |
4892 | * | |
4893 | */ | |
4894 | static int ibmvfc_resume(struct device *dev) | |
4895 | { | |
4896 | unsigned long flags; | |
4897 | struct ibmvfc_host *vhost = dev_get_drvdata(dev); | |
4898 | struct vio_dev *vdev = to_vio_dev(dev); | |
4899 | ||
4900 | spin_lock_irqsave(vhost->host->host_lock, flags); | |
4901 | vio_disable_interrupts(vdev); | |
4902 | tasklet_schedule(&vhost->tasklet); | |
4903 | spin_unlock_irqrestore(vhost->host->host_lock, flags); | |
4904 | return 0; | |
4905 | } | |
4906 | ||
39c1ffec BK |
4907 | /** |
4908 | * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver | |
4909 | * @vdev: vio device struct | |
4910 | * | |
4911 | * Return value: | |
4912 | * Number of bytes the driver will need to DMA map at the same time in | |
4913 | * order to perform well. | |
4914 | */ | |
4915 | static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) | |
4916 | { | |
4917 | unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); | |
4918 | return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); | |
4919 | } | |
4920 | ||
6f039790 | 4921 | static struct vio_device_id ibmvfc_device_table[] = { |
072b91f9 BK |
4922 | {"fcp", "IBM,vfc-client"}, |
4923 | { "", "" } | |
4924 | }; | |
4925 | MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); | |
4926 | ||
b0f4d4cf BK |
4927 | static struct dev_pm_ops ibmvfc_pm_ops = { |
4928 | .resume = ibmvfc_resume | |
4929 | }; | |
4930 | ||
072b91f9 BK |
4931 | static struct vio_driver ibmvfc_driver = { |
4932 | .id_table = ibmvfc_device_table, | |
4933 | .probe = ibmvfc_probe, | |
4934 | .remove = ibmvfc_remove, | |
39c1ffec | 4935 | .get_desired_dma = ibmvfc_get_desired_dma, |
cb52d897 BH |
4936 | .name = IBMVFC_NAME, |
4937 | .pm = &ibmvfc_pm_ops, | |
072b91f9 BK |
4938 | }; |
4939 | ||
4940 | static struct fc_function_template ibmvfc_transport_functions = { | |
4941 | .show_host_fabric_name = 1, | |
4942 | .show_host_node_name = 1, | |
4943 | .show_host_port_name = 1, | |
4944 | .show_host_supported_classes = 1, | |
4945 | .show_host_port_type = 1, | |
4946 | .show_host_port_id = 1, | |
9ab3610f | 4947 | .show_host_maxframe_size = 1, |
072b91f9 BK |
4948 | |
4949 | .get_host_port_state = ibmvfc_get_host_port_state, | |
4950 | .show_host_port_state = 1, | |
4951 | ||
4952 | .get_host_speed = ibmvfc_get_host_speed, | |
4953 | .show_host_speed = 1, | |
4954 | ||
4955 | .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, | |
4956 | .terminate_rport_io = ibmvfc_terminate_rport_io, | |
4957 | ||
4958 | .show_rport_maxframe_size = 1, | |
4959 | .show_rport_supported_classes = 1, | |
4960 | ||
4961 | .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, | |
4962 | .show_rport_dev_loss_tmo = 1, | |
4963 | ||
4964 | .get_starget_node_name = ibmvfc_get_starget_node_name, | |
4965 | .show_starget_node_name = 1, | |
4966 | ||
4967 | .get_starget_port_name = ibmvfc_get_starget_port_name, | |
4968 | .show_starget_port_name = 1, | |
4969 | ||
4970 | .get_starget_port_id = ibmvfc_get_starget_port_id, | |
4971 | .show_starget_port_id = 1, | |
d31429e1 BK |
4972 | |
4973 | .bsg_request = ibmvfc_bsg_request, | |
4974 | .bsg_timeout = ibmvfc_bsg_timeout, | |
072b91f9 BK |
4975 | }; |
4976 | ||
4977 | /** | |
4978 | * ibmvfc_module_init - Initialize the ibmvfc module | |
4979 | * | |
4980 | * Return value: | |
4981 | * 0 on success / other on failure | |
4982 | **/ | |
4983 | static int __init ibmvfc_module_init(void) | |
4984 | { | |
4985 | int rc; | |
4986 | ||
4987 | if (!firmware_has_feature(FW_FEATURE_VIO)) | |
4988 | return -ENODEV; | |
4989 | ||
4990 | printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", | |
4991 | IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); | |
4992 | ||
4993 | ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); | |
4994 | if (!ibmvfc_transport_template) | |
4995 | return -ENOMEM; | |
4996 | ||
4997 | rc = vio_register_driver(&ibmvfc_driver); | |
4998 | if (rc) | |
4999 | fc_release_transport(ibmvfc_transport_template); | |
5000 | return rc; | |
5001 | } | |
5002 | ||
5003 | /** | |
5004 | * ibmvfc_module_exit - Teardown the ibmvfc module | |
5005 | * | |
5006 | * Return value: | |
5007 | * nothing | |
5008 | **/ | |
5009 | static void __exit ibmvfc_module_exit(void) | |
5010 | { | |
5011 | vio_unregister_driver(&ibmvfc_driver); | |
5012 | fc_release_transport(ibmvfc_transport_template); | |
5013 | } | |
5014 | ||
5015 | module_init(ibmvfc_module_init); | |
5016 | module_exit(ibmvfc_module_exit); |