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Commit | Line | Data |
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afaf5a2d DS |
1 | /* |
2 | * QLogic iSCSI HBA Driver | |
3 | * Copyright (c) 2003-2006 QLogic Corporation | |
4 | * | |
5 | * See LICENSE.qla4xxx for copyright and licensing details. | |
6 | */ | |
7 | #include <linux/moduleparam.h> | |
5a0e3ad6 | 8 | #include <linux/slab.h> |
afaf5a2d DS |
9 | |
10 | #include <scsi/scsi_tcq.h> | |
11 | #include <scsi/scsicam.h> | |
12 | ||
13 | #include "ql4_def.h" | |
bee4fe8e DS |
14 | #include "ql4_version.h" |
15 | #include "ql4_glbl.h" | |
16 | #include "ql4_dbg.h" | |
17 | #include "ql4_inline.h" | |
afaf5a2d DS |
18 | |
19 | /* | |
20 | * Driver version | |
21 | */ | |
47975477 | 22 | static char qla4xxx_version_str[40]; |
afaf5a2d DS |
23 | |
24 | /* | |
25 | * SRB allocation cache | |
26 | */ | |
e18b890b | 27 | static struct kmem_cache *srb_cachep; |
afaf5a2d DS |
28 | |
29 | /* | |
30 | * Module parameter information and variables | |
31 | */ | |
32 | int ql4xdiscoverywait = 60; | |
33 | module_param(ql4xdiscoverywait, int, S_IRUGO | S_IRUSR); | |
34 | MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time"); | |
35 | int ql4xdontresethba = 0; | |
36 | module_param(ql4xdontresethba, int, S_IRUGO | S_IRUSR); | |
37 | MODULE_PARM_DESC(ql4xdontresethba, | |
38 | "Dont reset the HBA when the driver gets 0x8002 AEN " | |
39 | " default it will reset hba :0" | |
40 | " set to 1 to avoid resetting HBA"); | |
41 | ||
11010fec AV |
42 | int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */ |
43 | module_param(ql4xextended_error_logging, int, S_IRUGO | S_IRUSR); | |
44 | MODULE_PARM_DESC(ql4xextended_error_logging, | |
afaf5a2d DS |
45 | "Option to enable extended error logging, " |
46 | "Default is 0 - no logging, 1 - debug logging"); | |
47 | ||
477ffb9d DS |
48 | int ql4_mod_unload = 0; |
49 | ||
d510d965 MC |
50 | #define QL4_DEF_QDEPTH 32 |
51 | ||
afaf5a2d DS |
52 | /* |
53 | * SCSI host template entry points | |
54 | */ | |
47975477 | 55 | static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha); |
afaf5a2d DS |
56 | |
57 | /* | |
58 | * iSCSI template entry points | |
59 | */ | |
2174a04e MC |
60 | static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost, |
61 | enum iscsi_tgt_dscvr type, uint32_t enable, | |
62 | struct sockaddr *dst_addr); | |
afaf5a2d DS |
63 | static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn, |
64 | enum iscsi_param param, char *buf); | |
65 | static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess, | |
66 | enum iscsi_param param, char *buf); | |
aa1e93a2 MC |
67 | static int qla4xxx_host_get_param(struct Scsi_Host *shost, |
68 | enum iscsi_host_param param, char *buf); | |
afaf5a2d | 69 | static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session); |
5c656af7 | 70 | static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc); |
afaf5a2d DS |
71 | |
72 | /* | |
73 | * SCSI host template entry points | |
74 | */ | |
75 | static int qla4xxx_queuecommand(struct scsi_cmnd *cmd, | |
76 | void (*done) (struct scsi_cmnd *)); | |
77 | static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd); | |
ce545039 | 78 | static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd); |
afaf5a2d DS |
79 | static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd); |
80 | static int qla4xxx_slave_alloc(struct scsi_device *device); | |
81 | static int qla4xxx_slave_configure(struct scsi_device *device); | |
82 | static void qla4xxx_slave_destroy(struct scsi_device *sdev); | |
024f801f | 83 | static void qla4xxx_scan_start(struct Scsi_Host *shost); |
afaf5a2d DS |
84 | |
85 | static struct scsi_host_template qla4xxx_driver_template = { | |
86 | .module = THIS_MODULE, | |
87 | .name = DRIVER_NAME, | |
88 | .proc_name = DRIVER_NAME, | |
89 | .queuecommand = qla4xxx_queuecommand, | |
90 | ||
91 | .eh_device_reset_handler = qla4xxx_eh_device_reset, | |
ce545039 | 92 | .eh_target_reset_handler = qla4xxx_eh_target_reset, |
afaf5a2d | 93 | .eh_host_reset_handler = qla4xxx_eh_host_reset, |
5c656af7 | 94 | .eh_timed_out = qla4xxx_eh_cmd_timed_out, |
afaf5a2d DS |
95 | |
96 | .slave_configure = qla4xxx_slave_configure, | |
97 | .slave_alloc = qla4xxx_slave_alloc, | |
98 | .slave_destroy = qla4xxx_slave_destroy, | |
99 | ||
921601b7 | 100 | .scan_finished = iscsi_scan_finished, |
024f801f | 101 | .scan_start = qla4xxx_scan_start, |
921601b7 | 102 | |
afaf5a2d DS |
103 | .this_id = -1, |
104 | .cmd_per_lun = 3, | |
105 | .use_clustering = ENABLE_CLUSTERING, | |
106 | .sg_tablesize = SG_ALL, | |
107 | ||
108 | .max_sectors = 0xFFFF, | |
109 | }; | |
110 | ||
111 | static struct iscsi_transport qla4xxx_iscsi_transport = { | |
112 | .owner = THIS_MODULE, | |
113 | .name = DRIVER_NAME, | |
d8196ed2 MC |
114 | .caps = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD | |
115 | CAP_DATA_PATH_OFFLOAD, | |
aa1e93a2 MC |
116 | .param_mask = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS | |
117 | ISCSI_TARGET_NAME | ISCSI_TPGT, | |
8ad5781a | 118 | .host_param_mask = ISCSI_HOST_HWADDRESS | |
22236961 | 119 | ISCSI_HOST_IPADDRESS | |
8ad5781a | 120 | ISCSI_HOST_INITIATOR_NAME, |
afaf5a2d DS |
121 | .tgt_dscvr = qla4xxx_tgt_dscvr, |
122 | .get_conn_param = qla4xxx_conn_get_param, | |
123 | .get_session_param = qla4xxx_sess_get_param, | |
aa1e93a2 | 124 | .get_host_param = qla4xxx_host_get_param, |
afaf5a2d DS |
125 | .session_recovery_timedout = qla4xxx_recovery_timedout, |
126 | }; | |
127 | ||
128 | static struct scsi_transport_template *qla4xxx_scsi_transport; | |
129 | ||
5c656af7 MC |
130 | static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc) |
131 | { | |
132 | struct iscsi_cls_session *session; | |
133 | struct ddb_entry *ddb_entry; | |
134 | ||
135 | session = starget_to_session(scsi_target(sc->device)); | |
136 | ddb_entry = session->dd_data; | |
137 | ||
138 | /* if we are not logged in then the LLD is going to clean up the cmd */ | |
139 | if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) | |
140 | return BLK_EH_RESET_TIMER; | |
141 | else | |
142 | return BLK_EH_NOT_HANDLED; | |
143 | } | |
144 | ||
afaf5a2d DS |
145 | static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session) |
146 | { | |
147 | struct ddb_entry *ddb_entry = session->dd_data; | |
148 | struct scsi_qla_host *ha = ddb_entry->ha; | |
149 | ||
568d303b MC |
150 | if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) { |
151 | atomic_set(&ddb_entry->state, DDB_STATE_DEAD); | |
152 | ||
153 | DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count " | |
154 | "of (%d) secs exhausted, marking device DEAD.\n", | |
155 | ha->host_no, __func__, ddb_entry->fw_ddb_index, | |
156 | ha->port_down_retry_count)); | |
157 | ||
158 | DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc " | |
159 | "flags = 0x%lx\n", | |
160 | ha->host_no, __func__, ha->dpc_flags)); | |
161 | queue_work(ha->dpc_thread, &ha->dpc_work); | |
162 | } | |
afaf5a2d DS |
163 | } |
164 | ||
aa1e93a2 MC |
165 | static int qla4xxx_host_get_param(struct Scsi_Host *shost, |
166 | enum iscsi_host_param param, char *buf) | |
167 | { | |
168 | struct scsi_qla_host *ha = to_qla_host(shost); | |
169 | int len; | |
170 | ||
171 | switch (param) { | |
172 | case ISCSI_HOST_PARAM_HWADDRESS: | |
7ffc49a6 | 173 | len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN); |
8ad5781a | 174 | break; |
22236961 MC |
175 | case ISCSI_HOST_PARAM_IPADDRESS: |
176 | len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0], | |
177 | ha->ip_address[1], ha->ip_address[2], | |
178 | ha->ip_address[3]); | |
179 | break; | |
8ad5781a | 180 | case ISCSI_HOST_PARAM_INITIATOR_NAME: |
22236961 | 181 | len = sprintf(buf, "%s\n", ha->name_string); |
aa1e93a2 MC |
182 | break; |
183 | default: | |
184 | return -ENOSYS; | |
185 | } | |
186 | ||
187 | return len; | |
188 | } | |
189 | ||
afaf5a2d DS |
190 | static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess, |
191 | enum iscsi_param param, char *buf) | |
192 | { | |
193 | struct ddb_entry *ddb_entry = sess->dd_data; | |
194 | int len; | |
195 | ||
196 | switch (param) { | |
197 | case ISCSI_PARAM_TARGET_NAME: | |
198 | len = snprintf(buf, PAGE_SIZE - 1, "%s\n", | |
199 | ddb_entry->iscsi_name); | |
200 | break; | |
201 | case ISCSI_PARAM_TPGT: | |
202 | len = sprintf(buf, "%u\n", ddb_entry->tpgt); | |
203 | break; | |
204 | default: | |
205 | return -ENOSYS; | |
206 | } | |
207 | ||
208 | return len; | |
209 | } | |
210 | ||
211 | static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn, | |
212 | enum iscsi_param param, char *buf) | |
213 | { | |
214 | struct iscsi_cls_session *session; | |
215 | struct ddb_entry *ddb_entry; | |
216 | int len; | |
217 | ||
218 | session = iscsi_dev_to_session(conn->dev.parent); | |
219 | ddb_entry = session->dd_data; | |
220 | ||
221 | switch (param) { | |
222 | case ISCSI_PARAM_CONN_PORT: | |
223 | len = sprintf(buf, "%hu\n", ddb_entry->port); | |
224 | break; | |
225 | case ISCSI_PARAM_CONN_ADDRESS: | |
226 | /* TODO: what are the ipv6 bits */ | |
63779436 | 227 | len = sprintf(buf, "%pI4\n", &ddb_entry->ip_addr); |
afaf5a2d DS |
228 | break; |
229 | default: | |
230 | return -ENOSYS; | |
231 | } | |
232 | ||
233 | return len; | |
234 | } | |
235 | ||
2174a04e MC |
236 | static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost, |
237 | enum iscsi_tgt_dscvr type, uint32_t enable, | |
238 | struct sockaddr *dst_addr) | |
afaf5a2d DS |
239 | { |
240 | struct scsi_qla_host *ha; | |
afaf5a2d DS |
241 | struct sockaddr_in *addr; |
242 | struct sockaddr_in6 *addr6; | |
243 | int ret = 0; | |
244 | ||
afaf5a2d DS |
245 | ha = (struct scsi_qla_host *) shost->hostdata; |
246 | ||
247 | switch (type) { | |
248 | case ISCSI_TGT_DSCVR_SEND_TARGETS: | |
249 | if (dst_addr->sa_family == AF_INET) { | |
250 | addr = (struct sockaddr_in *)dst_addr; | |
251 | if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr, | |
252 | addr->sin_port) != QLA_SUCCESS) | |
253 | ret = -EIO; | |
254 | } else if (dst_addr->sa_family == AF_INET6) { | |
255 | /* | |
256 | * TODO: fix qla4xxx_send_tgts | |
257 | */ | |
258 | addr6 = (struct sockaddr_in6 *)dst_addr; | |
259 | if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr, | |
260 | addr6->sin6_port) != QLA_SUCCESS) | |
261 | ret = -EIO; | |
262 | } else | |
263 | ret = -ENOSYS; | |
264 | break; | |
265 | default: | |
266 | ret = -ENOSYS; | |
267 | } | |
afaf5a2d DS |
268 | return ret; |
269 | } | |
270 | ||
271 | void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry) | |
272 | { | |
273 | if (!ddb_entry->sess) | |
274 | return; | |
275 | ||
276 | if (ddb_entry->conn) { | |
26974789 | 277 | atomic_set(&ddb_entry->state, DDB_STATE_DEAD); |
afaf5a2d DS |
278 | iscsi_remove_session(ddb_entry->sess); |
279 | } | |
280 | iscsi_free_session(ddb_entry->sess); | |
281 | } | |
282 | ||
283 | int qla4xxx_add_sess(struct ddb_entry *ddb_entry) | |
284 | { | |
285 | int err; | |
286 | ||
26974789 | 287 | ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count; |
afaf5a2d DS |
288 | err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index); |
289 | if (err) { | |
290 | DEBUG2(printk(KERN_ERR "Could not add session.\n")); | |
291 | return err; | |
292 | } | |
293 | ||
5d91e209 | 294 | ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0, 0); |
afaf5a2d DS |
295 | if (!ddb_entry->conn) { |
296 | iscsi_remove_session(ddb_entry->sess); | |
297 | DEBUG2(printk(KERN_ERR "Could not add connection.\n")); | |
298 | return -ENOMEM; | |
299 | } | |
b635930d MC |
300 | |
301 | /* finally ready to go */ | |
302 | iscsi_unblock_session(ddb_entry->sess); | |
afaf5a2d DS |
303 | return 0; |
304 | } | |
305 | ||
306 | struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha) | |
307 | { | |
308 | struct ddb_entry *ddb_entry; | |
309 | struct iscsi_cls_session *sess; | |
310 | ||
5d91e209 MC |
311 | sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport, |
312 | sizeof(struct ddb_entry)); | |
afaf5a2d DS |
313 | if (!sess) |
314 | return NULL; | |
315 | ||
316 | ddb_entry = sess->dd_data; | |
317 | memset(ddb_entry, 0, sizeof(*ddb_entry)); | |
318 | ddb_entry->ha = ha; | |
319 | ddb_entry->sess = sess; | |
320 | return ddb_entry; | |
321 | } | |
322 | ||
024f801f MC |
323 | static void qla4xxx_scan_start(struct Scsi_Host *shost) |
324 | { | |
325 | struct scsi_qla_host *ha = shost_priv(shost); | |
326 | struct ddb_entry *ddb_entry, *ddbtemp; | |
327 | ||
328 | /* finish setup of sessions that were already setup in firmware */ | |
329 | list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) { | |
330 | if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) | |
331 | qla4xxx_add_sess(ddb_entry); | |
332 | } | |
333 | } | |
334 | ||
afaf5a2d DS |
335 | /* |
336 | * Timer routines | |
337 | */ | |
338 | ||
339 | static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func, | |
340 | unsigned long interval) | |
341 | { | |
342 | DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n", | |
343 | __func__, ha->host->host_no)); | |
344 | init_timer(&ha->timer); | |
345 | ha->timer.expires = jiffies + interval * HZ; | |
346 | ha->timer.data = (unsigned long)ha; | |
347 | ha->timer.function = (void (*)(unsigned long))func; | |
348 | add_timer(&ha->timer); | |
349 | ha->timer_active = 1; | |
350 | } | |
351 | ||
352 | static void qla4xxx_stop_timer(struct scsi_qla_host *ha) | |
353 | { | |
354 | del_timer_sync(&ha->timer); | |
355 | ha->timer_active = 0; | |
356 | } | |
357 | ||
358 | /*** | |
359 | * qla4xxx_mark_device_missing - mark a device as missing. | |
360 | * @ha: Pointer to host adapter structure. | |
361 | * @ddb_entry: Pointer to device database entry | |
362 | * | |
363 | * This routine marks a device missing and resets the relogin retry count. | |
364 | **/ | |
365 | void qla4xxx_mark_device_missing(struct scsi_qla_host *ha, | |
366 | struct ddb_entry *ddb_entry) | |
367 | { | |
368 | atomic_set(&ddb_entry->state, DDB_STATE_MISSING); | |
369 | DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n", | |
370 | ha->host_no, ddb_entry->bus, ddb_entry->target, | |
371 | ddb_entry->fw_ddb_index)); | |
b635930d | 372 | iscsi_block_session(ddb_entry->sess); |
e5bd7b54 | 373 | iscsi_conn_error_event(ddb_entry->conn, ISCSI_ERR_CONN_FAILED); |
afaf5a2d DS |
374 | } |
375 | ||
376 | static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha, | |
377 | struct ddb_entry *ddb_entry, | |
378 | struct scsi_cmnd *cmd, | |
379 | void (*done)(struct scsi_cmnd *)) | |
380 | { | |
381 | struct srb *srb; | |
382 | ||
383 | srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC); | |
384 | if (!srb) | |
385 | return srb; | |
386 | ||
387 | atomic_set(&srb->ref_count, 1); | |
388 | srb->ha = ha; | |
389 | srb->ddb = ddb_entry; | |
390 | srb->cmd = cmd; | |
391 | srb->flags = 0; | |
392 | cmd->SCp.ptr = (void *)srb; | |
393 | cmd->scsi_done = done; | |
394 | ||
395 | return srb; | |
396 | } | |
397 | ||
398 | static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb) | |
399 | { | |
400 | struct scsi_cmnd *cmd = srb->cmd; | |
401 | ||
402 | if (srb->flags & SRB_DMA_VALID) { | |
5f7186c8 | 403 | scsi_dma_unmap(cmd); |
afaf5a2d DS |
404 | srb->flags &= ~SRB_DMA_VALID; |
405 | } | |
406 | cmd->SCp.ptr = NULL; | |
407 | } | |
408 | ||
409 | void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb) | |
410 | { | |
411 | struct scsi_cmnd *cmd = srb->cmd; | |
412 | ||
413 | qla4xxx_srb_free_dma(ha, srb); | |
414 | ||
415 | mempool_free(srb, ha->srb_mempool); | |
416 | ||
417 | cmd->scsi_done(cmd); | |
418 | } | |
419 | ||
420 | /** | |
421 | * qla4xxx_queuecommand - scsi layer issues scsi command to driver. | |
422 | * @cmd: Pointer to Linux's SCSI command structure | |
423 | * @done_fn: Function that the driver calls to notify the SCSI mid-layer | |
424 | * that the command has been processed. | |
425 | * | |
426 | * Remarks: | |
427 | * This routine is invoked by Linux to send a SCSI command to the driver. | |
428 | * The mid-level driver tries to ensure that queuecommand never gets | |
429 | * invoked concurrently with itself or the interrupt handler (although | |
430 | * the interrupt handler may call this routine as part of request- | |
431 | * completion handling). Unfortunely, it sometimes calls the scheduler | |
432 | * in interrupt context which is a big NO! NO!. | |
433 | **/ | |
434 | static int qla4xxx_queuecommand(struct scsi_cmnd *cmd, | |
435 | void (*done)(struct scsi_cmnd *)) | |
436 | { | |
437 | struct scsi_qla_host *ha = to_qla_host(cmd->device->host); | |
438 | struct ddb_entry *ddb_entry = cmd->device->hostdata; | |
7fb1921b | 439 | struct iscsi_cls_session *sess = ddb_entry->sess; |
afaf5a2d DS |
440 | struct srb *srb; |
441 | int rval; | |
442 | ||
7fb1921b MC |
443 | if (!sess) { |
444 | cmd->result = DID_IMM_RETRY << 16; | |
445 | goto qc_fail_command; | |
446 | } | |
447 | ||
448 | rval = iscsi_session_chkready(sess); | |
449 | if (rval) { | |
450 | cmd->result = rval; | |
451 | goto qc_fail_command; | |
452 | } | |
453 | ||
afaf5a2d DS |
454 | if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) { |
455 | if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) { | |
456 | cmd->result = DID_NO_CONNECT << 16; | |
457 | goto qc_fail_command; | |
458 | } | |
c5e98e91 | 459 | return SCSI_MLQUEUE_TARGET_BUSY; |
afaf5a2d DS |
460 | } |
461 | ||
477ffb9d DS |
462 | if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) |
463 | goto qc_host_busy; | |
464 | ||
afaf5a2d DS |
465 | spin_unlock_irq(ha->host->host_lock); |
466 | ||
467 | srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done); | |
468 | if (!srb) | |
469 | goto qc_host_busy_lock; | |
470 | ||
471 | rval = qla4xxx_send_command_to_isp(ha, srb); | |
472 | if (rval != QLA_SUCCESS) | |
473 | goto qc_host_busy_free_sp; | |
474 | ||
475 | spin_lock_irq(ha->host->host_lock); | |
476 | return 0; | |
477 | ||
478 | qc_host_busy_free_sp: | |
479 | qla4xxx_srb_free_dma(ha, srb); | |
480 | mempool_free(srb, ha->srb_mempool); | |
481 | ||
482 | qc_host_busy_lock: | |
483 | spin_lock_irq(ha->host->host_lock); | |
484 | ||
485 | qc_host_busy: | |
486 | return SCSI_MLQUEUE_HOST_BUSY; | |
487 | ||
488 | qc_fail_command: | |
489 | done(cmd); | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | /** | |
495 | * qla4xxx_mem_free - frees memory allocated to adapter | |
496 | * @ha: Pointer to host adapter structure. | |
497 | * | |
498 | * Frees memory previously allocated by qla4xxx_mem_alloc | |
499 | **/ | |
500 | static void qla4xxx_mem_free(struct scsi_qla_host *ha) | |
501 | { | |
502 | if (ha->queues) | |
503 | dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues, | |
504 | ha->queues_dma); | |
505 | ||
506 | ha->queues_len = 0; | |
507 | ha->queues = NULL; | |
508 | ha->queues_dma = 0; | |
509 | ha->request_ring = NULL; | |
510 | ha->request_dma = 0; | |
511 | ha->response_ring = NULL; | |
512 | ha->response_dma = 0; | |
513 | ha->shadow_regs = NULL; | |
514 | ha->shadow_regs_dma = 0; | |
515 | ||
516 | /* Free srb pool. */ | |
517 | if (ha->srb_mempool) | |
518 | mempool_destroy(ha->srb_mempool); | |
519 | ||
520 | ha->srb_mempool = NULL; | |
521 | ||
522 | /* release io space registers */ | |
523 | if (ha->reg) | |
524 | iounmap(ha->reg); | |
525 | pci_release_regions(ha->pdev); | |
526 | } | |
527 | ||
528 | /** | |
529 | * qla4xxx_mem_alloc - allocates memory for use by adapter. | |
530 | * @ha: Pointer to host adapter structure | |
531 | * | |
532 | * Allocates DMA memory for request and response queues. Also allocates memory | |
533 | * for srbs. | |
534 | **/ | |
535 | static int qla4xxx_mem_alloc(struct scsi_qla_host *ha) | |
536 | { | |
537 | unsigned long align; | |
538 | ||
539 | /* Allocate contiguous block of DMA memory for queues. */ | |
540 | ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) + | |
541 | (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) + | |
542 | sizeof(struct shadow_regs) + | |
543 | MEM_ALIGN_VALUE + | |
544 | (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1); | |
545 | ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len, | |
546 | &ha->queues_dma, GFP_KERNEL); | |
547 | if (ha->queues == NULL) { | |
548 | dev_warn(&ha->pdev->dev, | |
549 | "Memory Allocation failed - queues.\n"); | |
550 | ||
551 | goto mem_alloc_error_exit; | |
552 | } | |
553 | memset(ha->queues, 0, ha->queues_len); | |
554 | ||
555 | /* | |
556 | * As per RISC alignment requirements -- the bus-address must be a | |
557 | * multiple of the request-ring size (in bytes). | |
558 | */ | |
559 | align = 0; | |
560 | if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1)) | |
561 | align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma & | |
562 | (MEM_ALIGN_VALUE - 1)); | |
563 | ||
564 | /* Update request and response queue pointers. */ | |
565 | ha->request_dma = ha->queues_dma + align; | |
566 | ha->request_ring = (struct queue_entry *) (ha->queues + align); | |
567 | ha->response_dma = ha->queues_dma + align + | |
568 | (REQUEST_QUEUE_DEPTH * QUEUE_SIZE); | |
569 | ha->response_ring = (struct queue_entry *) (ha->queues + align + | |
570 | (REQUEST_QUEUE_DEPTH * | |
571 | QUEUE_SIZE)); | |
572 | ha->shadow_regs_dma = ha->queues_dma + align + | |
573 | (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) + | |
574 | (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE); | |
575 | ha->shadow_regs = (struct shadow_regs *) (ha->queues + align + | |
576 | (REQUEST_QUEUE_DEPTH * | |
577 | QUEUE_SIZE) + | |
578 | (RESPONSE_QUEUE_DEPTH * | |
579 | QUEUE_SIZE)); | |
580 | ||
581 | /* Allocate memory for srb pool. */ | |
582 | ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab, | |
583 | mempool_free_slab, srb_cachep); | |
584 | if (ha->srb_mempool == NULL) { | |
585 | dev_warn(&ha->pdev->dev, | |
586 | "Memory Allocation failed - SRB Pool.\n"); | |
587 | ||
588 | goto mem_alloc_error_exit; | |
589 | } | |
590 | ||
591 | return QLA_SUCCESS; | |
592 | ||
593 | mem_alloc_error_exit: | |
594 | qla4xxx_mem_free(ha); | |
595 | return QLA_ERROR; | |
596 | } | |
597 | ||
598 | /** | |
599 | * qla4xxx_timer - checks every second for work to do. | |
600 | * @ha: Pointer to host adapter structure. | |
601 | **/ | |
602 | static void qla4xxx_timer(struct scsi_qla_host *ha) | |
603 | { | |
604 | struct ddb_entry *ddb_entry, *dtemp; | |
605 | int start_dpc = 0; | |
606 | ||
607 | /* Search for relogin's to time-out and port down retry. */ | |
608 | list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) { | |
609 | /* Count down time between sending relogins */ | |
610 | if (adapter_up(ha) && | |
611 | !test_bit(DF_RELOGIN, &ddb_entry->flags) && | |
612 | atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) { | |
613 | if (atomic_read(&ddb_entry->retry_relogin_timer) != | |
614 | INVALID_ENTRY) { | |
615 | if (atomic_read(&ddb_entry->retry_relogin_timer) | |
616 | == 0) { | |
617 | atomic_set(&ddb_entry-> | |
618 | retry_relogin_timer, | |
619 | INVALID_ENTRY); | |
620 | set_bit(DPC_RELOGIN_DEVICE, | |
621 | &ha->dpc_flags); | |
622 | set_bit(DF_RELOGIN, &ddb_entry->flags); | |
623 | DEBUG2(printk("scsi%ld: %s: index [%d]" | |
624 | " login device\n", | |
625 | ha->host_no, __func__, | |
626 | ddb_entry->fw_ddb_index)); | |
627 | } else | |
628 | atomic_dec(&ddb_entry-> | |
629 | retry_relogin_timer); | |
630 | } | |
631 | } | |
632 | ||
633 | /* Wait for relogin to timeout */ | |
634 | if (atomic_read(&ddb_entry->relogin_timer) && | |
635 | (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) { | |
636 | /* | |
637 | * If the relogin times out and the device is | |
638 | * still NOT ONLINE then try and relogin again. | |
639 | */ | |
640 | if (atomic_read(&ddb_entry->state) != | |
641 | DDB_STATE_ONLINE && | |
642 | ddb_entry->fw_ddb_device_state == | |
643 | DDB_DS_SESSION_FAILED) { | |
644 | /* Reset retry relogin timer */ | |
645 | atomic_inc(&ddb_entry->relogin_retry_count); | |
646 | DEBUG2(printk("scsi%ld: index[%d] relogin" | |
647 | " timed out-retrying" | |
648 | " relogin (%d)\n", | |
649 | ha->host_no, | |
650 | ddb_entry->fw_ddb_index, | |
651 | atomic_read(&ddb_entry-> | |
652 | relogin_retry_count)) | |
653 | ); | |
654 | start_dpc++; | |
655 | DEBUG(printk("scsi%ld:%d:%d: index [%d] " | |
656 | "initate relogin after" | |
657 | " %d seconds\n", | |
658 | ha->host_no, ddb_entry->bus, | |
659 | ddb_entry->target, | |
660 | ddb_entry->fw_ddb_index, | |
661 | ddb_entry->default_time2wait + 4) | |
662 | ); | |
663 | ||
664 | atomic_set(&ddb_entry->retry_relogin_timer, | |
665 | ddb_entry->default_time2wait + 4); | |
666 | } | |
667 | } | |
668 | } | |
669 | ||
670 | /* Check for heartbeat interval. */ | |
671 | if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE && | |
672 | ha->heartbeat_interval != 0) { | |
673 | ha->seconds_since_last_heartbeat++; | |
674 | if (ha->seconds_since_last_heartbeat > | |
675 | ha->heartbeat_interval + 2) | |
676 | set_bit(DPC_RESET_HA, &ha->dpc_flags); | |
677 | } | |
678 | ||
679 | ||
680 | /* Wakeup the dpc routine for this adapter, if needed. */ | |
681 | if ((start_dpc || | |
682 | test_bit(DPC_RESET_HA, &ha->dpc_flags) || | |
683 | test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) || | |
684 | test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) || | |
685 | test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) || | |
686 | test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) || | |
687 | test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) || | |
688 | test_bit(DPC_AEN, &ha->dpc_flags)) && | |
689 | ha->dpc_thread) { | |
690 | DEBUG2(printk("scsi%ld: %s: scheduling dpc routine" | |
691 | " - dpc flags = 0x%lx\n", | |
692 | ha->host_no, __func__, ha->dpc_flags)); | |
693 | queue_work(ha->dpc_thread, &ha->dpc_work); | |
694 | } | |
695 | ||
696 | /* Reschedule timer thread to call us back in one second */ | |
697 | mod_timer(&ha->timer, jiffies + HZ); | |
698 | ||
699 | DEBUG2(ha->seconds_since_last_intr++); | |
700 | } | |
701 | ||
702 | /** | |
703 | * qla4xxx_cmd_wait - waits for all outstanding commands to complete | |
704 | * @ha: Pointer to host adapter structure. | |
705 | * | |
706 | * This routine stalls the driver until all outstanding commands are returned. | |
707 | * Caller must release the Hardware Lock prior to calling this routine. | |
708 | **/ | |
709 | static int qla4xxx_cmd_wait(struct scsi_qla_host *ha) | |
710 | { | |
711 | uint32_t index = 0; | |
712 | int stat = QLA_SUCCESS; | |
713 | unsigned long flags; | |
714 | struct scsi_cmnd *cmd; | |
715 | int wait_cnt = WAIT_CMD_TOV; /* | |
716 | * Initialized for 30 seconds as we | |
717 | * expect all commands to retuned | |
718 | * ASAP. | |
719 | */ | |
720 | ||
721 | while (wait_cnt) { | |
722 | spin_lock_irqsave(&ha->hardware_lock, flags); | |
723 | /* Find a command that hasn't completed. */ | |
724 | for (index = 0; index < ha->host->can_queue; index++) { | |
725 | cmd = scsi_host_find_tag(ha->host, index); | |
726 | if (cmd != NULL) | |
727 | break; | |
728 | } | |
729 | spin_unlock_irqrestore(&ha->hardware_lock, flags); | |
730 | ||
731 | /* If No Commands are pending, wait is complete */ | |
732 | if (index == ha->host->can_queue) { | |
733 | break; | |
734 | } | |
735 | ||
736 | /* If we timed out on waiting for commands to come back | |
737 | * return ERROR. | |
738 | */ | |
739 | wait_cnt--; | |
740 | if (wait_cnt == 0) | |
741 | stat = QLA_ERROR; | |
742 | else { | |
743 | msleep(1000); | |
744 | } | |
745 | } /* End of While (wait_cnt) */ | |
746 | ||
747 | return stat; | |
748 | } | |
749 | ||
bee4fe8e | 750 | void qla4xxx_hw_reset(struct scsi_qla_host *ha) |
afaf5a2d | 751 | { |
afaf5a2d | 752 | uint32_t ctrl_status; |
477ffb9d DS |
753 | unsigned long flags = 0; |
754 | ||
755 | DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__)); | |
afaf5a2d DS |
756 | |
757 | spin_lock_irqsave(&ha->hardware_lock, flags); | |
758 | ||
759 | /* | |
760 | * If the SCSI Reset Interrupt bit is set, clear it. | |
761 | * Otherwise, the Soft Reset won't work. | |
762 | */ | |
763 | ctrl_status = readw(&ha->reg->ctrl_status); | |
764 | if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) | |
765 | writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status); | |
766 | ||
767 | /* Issue Soft Reset */ | |
768 | writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status); | |
769 | readl(&ha->reg->ctrl_status); | |
770 | ||
771 | spin_unlock_irqrestore(&ha->hardware_lock, flags); | |
477ffb9d DS |
772 | } |
773 | ||
774 | /** | |
775 | * qla4xxx_soft_reset - performs soft reset. | |
776 | * @ha: Pointer to host adapter structure. | |
777 | **/ | |
778 | int qla4xxx_soft_reset(struct scsi_qla_host *ha) | |
779 | { | |
780 | uint32_t max_wait_time; | |
781 | unsigned long flags = 0; | |
782 | int status = QLA_ERROR; | |
783 | uint32_t ctrl_status; | |
784 | ||
785 | qla4xxx_hw_reset(ha); | |
afaf5a2d DS |
786 | |
787 | /* Wait until the Network Reset Intr bit is cleared */ | |
788 | max_wait_time = RESET_INTR_TOV; | |
789 | do { | |
790 | spin_lock_irqsave(&ha->hardware_lock, flags); | |
791 | ctrl_status = readw(&ha->reg->ctrl_status); | |
792 | spin_unlock_irqrestore(&ha->hardware_lock, flags); | |
793 | ||
794 | if ((ctrl_status & CSR_NET_RESET_INTR) == 0) | |
795 | break; | |
796 | ||
797 | msleep(1000); | |
798 | } while ((--max_wait_time)); | |
799 | ||
800 | if ((ctrl_status & CSR_NET_RESET_INTR) != 0) { | |
801 | DEBUG2(printk(KERN_WARNING | |
802 | "scsi%ld: Network Reset Intr not cleared by " | |
803 | "Network function, clearing it now!\n", | |
804 | ha->host_no)); | |
805 | spin_lock_irqsave(&ha->hardware_lock, flags); | |
806 | writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status); | |
807 | readl(&ha->reg->ctrl_status); | |
808 | spin_unlock_irqrestore(&ha->hardware_lock, flags); | |
809 | } | |
810 | ||
811 | /* Wait until the firmware tells us the Soft Reset is done */ | |
812 | max_wait_time = SOFT_RESET_TOV; | |
813 | do { | |
814 | spin_lock_irqsave(&ha->hardware_lock, flags); | |
815 | ctrl_status = readw(&ha->reg->ctrl_status); | |
816 | spin_unlock_irqrestore(&ha->hardware_lock, flags); | |
817 | ||
818 | if ((ctrl_status & CSR_SOFT_RESET) == 0) { | |
819 | status = QLA_SUCCESS; | |
820 | break; | |
821 | } | |
822 | ||
823 | msleep(1000); | |
824 | } while ((--max_wait_time)); | |
825 | ||
826 | /* | |
827 | * Also, make sure that the SCSI Reset Interrupt bit has been cleared | |
828 | * after the soft reset has taken place. | |
829 | */ | |
830 | spin_lock_irqsave(&ha->hardware_lock, flags); | |
831 | ctrl_status = readw(&ha->reg->ctrl_status); | |
832 | if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) { | |
833 | writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status); | |
834 | readl(&ha->reg->ctrl_status); | |
835 | } | |
836 | spin_unlock_irqrestore(&ha->hardware_lock, flags); | |
837 | ||
838 | /* If soft reset fails then most probably the bios on other | |
839 | * function is also enabled. | |
840 | * Since the initialization is sequential the other fn | |
841 | * wont be able to acknowledge the soft reset. | |
842 | * Issue a force soft reset to workaround this scenario. | |
843 | */ | |
844 | if (max_wait_time == 0) { | |
845 | /* Issue Force Soft Reset */ | |
846 | spin_lock_irqsave(&ha->hardware_lock, flags); | |
847 | writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status); | |
848 | readl(&ha->reg->ctrl_status); | |
849 | spin_unlock_irqrestore(&ha->hardware_lock, flags); | |
850 | /* Wait until the firmware tells us the Soft Reset is done */ | |
851 | max_wait_time = SOFT_RESET_TOV; | |
852 | do { | |
853 | spin_lock_irqsave(&ha->hardware_lock, flags); | |
854 | ctrl_status = readw(&ha->reg->ctrl_status); | |
855 | spin_unlock_irqrestore(&ha->hardware_lock, flags); | |
856 | ||
857 | if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) { | |
858 | status = QLA_SUCCESS; | |
859 | break; | |
860 | } | |
861 | ||
862 | msleep(1000); | |
863 | } while ((--max_wait_time)); | |
864 | } | |
865 | ||
866 | return status; | |
867 | } | |
868 | ||
afaf5a2d DS |
869 | /** |
870 | * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S. | |
871 | * @ha: Pointer to host adapter structure. | |
872 | * | |
873 | * This routine is called just prior to a HARD RESET to return all | |
874 | * outstanding commands back to the Operating System. | |
875 | * Caller should make sure that the following locks are released | |
876 | * before this calling routine: Hardware lock, and io_request_lock. | |
877 | **/ | |
878 | static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha) | |
879 | { | |
880 | struct srb *srb; | |
881 | int i; | |
882 | unsigned long flags; | |
883 | ||
884 | spin_lock_irqsave(&ha->hardware_lock, flags); | |
885 | for (i = 0; i < ha->host->can_queue; i++) { | |
886 | srb = qla4xxx_del_from_active_array(ha, i); | |
887 | if (srb != NULL) { | |
888 | srb->cmd->result = DID_RESET << 16; | |
889 | qla4xxx_srb_compl(ha, srb); | |
890 | } | |
891 | } | |
892 | spin_unlock_irqrestore(&ha->hardware_lock, flags); | |
893 | ||
894 | } | |
895 | ||
afaf5a2d DS |
896 | /** |
897 | * qla4xxx_recover_adapter - recovers adapter after a fatal error | |
898 | * @ha: Pointer to host adapter structure. | |
899 | * @renew_ddb_list: Indicates what to do with the adapter's ddb list | |
50a29aec MC |
900 | * |
901 | * renew_ddb_list value can be 0=preserve ddb list, 1=destroy and rebuild | |
902 | * ddb list. | |
afaf5a2d DS |
903 | **/ |
904 | static int qla4xxx_recover_adapter(struct scsi_qla_host *ha, | |
905 | uint8_t renew_ddb_list) | |
906 | { | |
907 | int status; | |
908 | ||
909 | /* Stall incoming I/O until we are done */ | |
910 | clear_bit(AF_ONLINE, &ha->flags); | |
50a29aec | 911 | |
afaf5a2d DS |
912 | DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no, |
913 | __func__)); | |
914 | ||
915 | /* Wait for outstanding commands to complete. | |
916 | * Stalls the driver for max 30 secs | |
917 | */ | |
918 | status = qla4xxx_cmd_wait(ha); | |
919 | ||
920 | qla4xxx_disable_intrs(ha); | |
921 | ||
922 | /* Flush any pending ddb changed AENs */ | |
923 | qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); | |
924 | ||
dca05c4c KH |
925 | qla4xxx_flush_active_srbs(ha); |
926 | ||
afaf5a2d DS |
927 | /* Reset the firmware. If successful, function |
928 | * returns with ISP interrupts enabled. | |
929 | */ | |
dca05c4c KH |
930 | DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n", |
931 | ha->host_no, __func__)); | |
932 | if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) | |
933 | status = qla4xxx_soft_reset(ha); | |
934 | else | |
935 | status = QLA_ERROR; | |
afaf5a2d DS |
936 | |
937 | /* Flush any pending ddb changed AENs */ | |
938 | qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); | |
939 | ||
940 | /* Re-initialize firmware. If successful, function returns | |
941 | * with ISP interrupts enabled */ | |
942 | if (status == QLA_SUCCESS) { | |
943 | DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n", | |
944 | ha->host_no, __func__)); | |
945 | ||
946 | /* If successful, AF_ONLINE flag set in | |
947 | * qla4xxx_initialize_adapter */ | |
948 | status = qla4xxx_initialize_adapter(ha, renew_ddb_list); | |
949 | } | |
950 | ||
951 | /* Failed adapter initialization? | |
952 | * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */ | |
953 | if ((test_bit(AF_ONLINE, &ha->flags) == 0) && | |
954 | (test_bit(DPC_RESET_HA, &ha->dpc_flags))) { | |
955 | /* Adapter initialization failed, see if we can retry | |
956 | * resetting the ha */ | |
957 | if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) { | |
958 | ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES; | |
959 | DEBUG2(printk("scsi%ld: recover adapter - retrying " | |
960 | "(%d) more times\n", ha->host_no, | |
961 | ha->retry_reset_ha_cnt)); | |
962 | set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); | |
963 | status = QLA_ERROR; | |
964 | } else { | |
965 | if (ha->retry_reset_ha_cnt > 0) { | |
966 | /* Schedule another Reset HA--DPC will retry */ | |
967 | ha->retry_reset_ha_cnt--; | |
968 | DEBUG2(printk("scsi%ld: recover adapter - " | |
969 | "retry remaining %d\n", | |
970 | ha->host_no, | |
971 | ha->retry_reset_ha_cnt)); | |
972 | status = QLA_ERROR; | |
973 | } | |
974 | ||
975 | if (ha->retry_reset_ha_cnt == 0) { | |
976 | /* Recover adapter retries have been exhausted. | |
977 | * Adapter DEAD */ | |
978 | DEBUG2(printk("scsi%ld: recover adapter " | |
979 | "failed - board disabled\n", | |
980 | ha->host_no)); | |
981 | qla4xxx_flush_active_srbs(ha); | |
982 | clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); | |
983 | clear_bit(DPC_RESET_HA, &ha->dpc_flags); | |
984 | clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, | |
985 | &ha->dpc_flags); | |
986 | status = QLA_ERROR; | |
987 | } | |
988 | } | |
989 | } else { | |
990 | clear_bit(DPC_RESET_HA, &ha->dpc_flags); | |
991 | clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags); | |
992 | clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); | |
993 | } | |
994 | ||
995 | ha->adapter_error_count++; | |
996 | ||
997 | if (status == QLA_SUCCESS) | |
998 | qla4xxx_enable_intrs(ha); | |
999 | ||
1000 | DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no)); | |
1001 | return status; | |
1002 | } | |
1003 | ||
1004 | /** | |
1005 | * qla4xxx_do_dpc - dpc routine | |
1006 | * @data: in our case pointer to adapter structure | |
1007 | * | |
1008 | * This routine is a task that is schedule by the interrupt handler | |
1009 | * to perform the background processing for interrupts. We put it | |
1010 | * on a task queue that is consumed whenever the scheduler runs; that's | |
1011 | * so you can do anything (i.e. put the process to sleep etc). In fact, | |
1012 | * the mid-level tries to sleep when it reaches the driver threshold | |
1013 | * "host->can_queue". This can cause a panic if we were in our interrupt code. | |
1014 | **/ | |
c4028958 | 1015 | static void qla4xxx_do_dpc(struct work_struct *work) |
afaf5a2d | 1016 | { |
c4028958 DH |
1017 | struct scsi_qla_host *ha = |
1018 | container_of(work, struct scsi_qla_host, dpc_work); | |
afaf5a2d | 1019 | struct ddb_entry *ddb_entry, *dtemp; |
477ffb9d | 1020 | int status = QLA_ERROR; |
afaf5a2d | 1021 | |
f26b9044 | 1022 | DEBUG2(printk("scsi%ld: %s: DPC handler waking up." |
477ffb9d DS |
1023 | "flags = 0x%08lx, dpc_flags = 0x%08lx ctrl_stat = 0x%08x\n", |
1024 | ha->host_no, __func__, ha->flags, ha->dpc_flags, | |
1025 | readw(&ha->reg->ctrl_status))); | |
afaf5a2d DS |
1026 | |
1027 | /* Initialization not yet finished. Don't do anything yet. */ | |
1028 | if (!test_bit(AF_INIT_DONE, &ha->flags)) | |
1029 | return; | |
1030 | ||
1031 | if (adapter_up(ha) || | |
1032 | test_bit(DPC_RESET_HA, &ha->dpc_flags) || | |
1033 | test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) || | |
1034 | test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) { | |
f26b9044 DS |
1035 | if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) || |
1036 | test_bit(DPC_RESET_HA, &ha->dpc_flags)) | |
afaf5a2d DS |
1037 | qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST); |
1038 | ||
477ffb9d | 1039 | if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) { |
afaf5a2d | 1040 | uint8_t wait_time = RESET_INTR_TOV; |
afaf5a2d | 1041 | |
afaf5a2d DS |
1042 | while ((readw(&ha->reg->ctrl_status) & |
1043 | (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) { | |
1044 | if (--wait_time == 0) | |
1045 | break; | |
afaf5a2d | 1046 | msleep(1000); |
afaf5a2d | 1047 | } |
afaf5a2d DS |
1048 | if (wait_time == 0) |
1049 | DEBUG2(printk("scsi%ld: %s: SR|FSR " | |
1050 | "bit not cleared-- resetting\n", | |
1051 | ha->host_no, __func__)); | |
477ffb9d DS |
1052 | qla4xxx_flush_active_srbs(ha); |
1053 | if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) { | |
1054 | qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); | |
1055 | status = qla4xxx_initialize_adapter(ha, | |
1056 | PRESERVE_DDB_LIST); | |
1057 | } | |
1058 | clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags); | |
1059 | if (status == QLA_SUCCESS) | |
1060 | qla4xxx_enable_intrs(ha); | |
afaf5a2d DS |
1061 | } |
1062 | } | |
1063 | ||
1064 | /* ---- process AEN? --- */ | |
1065 | if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags)) | |
1066 | qla4xxx_process_aen(ha, PROCESS_ALL_AENS); | |
1067 | ||
1068 | /* ---- Get DHCP IP Address? --- */ | |
1069 | if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags)) | |
1070 | qla4xxx_get_dhcp_ip_address(ha); | |
1071 | ||
1072 | /* ---- relogin device? --- */ | |
1073 | if (adapter_up(ha) && | |
1074 | test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) { | |
1075 | list_for_each_entry_safe(ddb_entry, dtemp, | |
1076 | &ha->ddb_list, list) { | |
1077 | if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) && | |
1078 | atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) | |
1079 | qla4xxx_relogin_device(ha, ddb_entry); | |
1080 | ||
1081 | /* | |
1082 | * If mbx cmd times out there is no point | |
1083 | * in continuing further. | |
1084 | * With large no of targets this can hang | |
1085 | * the system. | |
1086 | */ | |
1087 | if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) { | |
1088 | printk(KERN_WARNING "scsi%ld: %s: " | |
1089 | "need to reset hba\n", | |
1090 | ha->host_no, __func__); | |
1091 | break; | |
1092 | } | |
1093 | } | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | /** | |
1098 | * qla4xxx_free_adapter - release the adapter | |
1099 | * @ha: pointer to adapter structure | |
1100 | **/ | |
1101 | static void qla4xxx_free_adapter(struct scsi_qla_host *ha) | |
1102 | { | |
1103 | ||
1104 | if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) { | |
1105 | /* Turn-off interrupts on the card. */ | |
1106 | qla4xxx_disable_intrs(ha); | |
1107 | } | |
1108 | ||
1109 | /* Kill the kernel thread for this host */ | |
1110 | if (ha->dpc_thread) | |
1111 | destroy_workqueue(ha->dpc_thread); | |
1112 | ||
1113 | /* Issue Soft Reset to put firmware in unknown state */ | |
f26b9044 | 1114 | if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) |
477ffb9d | 1115 | qla4xxx_hw_reset(ha); |
afaf5a2d DS |
1116 | |
1117 | /* Remove timer thread, if present */ | |
1118 | if (ha->timer_active) | |
1119 | qla4xxx_stop_timer(ha); | |
1120 | ||
afaf5a2d DS |
1121 | /* Detach interrupts */ |
1122 | if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags)) | |
1123 | free_irq(ha->pdev->irq, ha); | |
1124 | ||
bee4fe8e DS |
1125 | /* free extra memory */ |
1126 | qla4xxx_mem_free(ha); | |
1127 | ||
afaf5a2d DS |
1128 | pci_disable_device(ha->pdev); |
1129 | ||
1130 | } | |
1131 | ||
1132 | /*** | |
1133 | * qla4xxx_iospace_config - maps registers | |
1134 | * @ha: pointer to adapter structure | |
1135 | * | |
1136 | * This routines maps HBA's registers from the pci address space | |
1137 | * into the kernel virtual address space for memory mapped i/o. | |
1138 | **/ | |
1139 | static int qla4xxx_iospace_config(struct scsi_qla_host *ha) | |
1140 | { | |
1141 | unsigned long pio, pio_len, pio_flags; | |
1142 | unsigned long mmio, mmio_len, mmio_flags; | |
1143 | ||
1144 | pio = pci_resource_start(ha->pdev, 0); | |
1145 | pio_len = pci_resource_len(ha->pdev, 0); | |
1146 | pio_flags = pci_resource_flags(ha->pdev, 0); | |
1147 | if (pio_flags & IORESOURCE_IO) { | |
1148 | if (pio_len < MIN_IOBASE_LEN) { | |
1149 | dev_warn(&ha->pdev->dev, | |
1150 | "Invalid PCI I/O region size\n"); | |
1151 | pio = 0; | |
1152 | } | |
1153 | } else { | |
1154 | dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n"); | |
1155 | pio = 0; | |
1156 | } | |
1157 | ||
1158 | /* Use MMIO operations for all accesses. */ | |
1159 | mmio = pci_resource_start(ha->pdev, 1); | |
1160 | mmio_len = pci_resource_len(ha->pdev, 1); | |
1161 | mmio_flags = pci_resource_flags(ha->pdev, 1); | |
1162 | ||
1163 | if (!(mmio_flags & IORESOURCE_MEM)) { | |
1164 | dev_err(&ha->pdev->dev, | |
1165 | "region #0 not an MMIO resource, aborting\n"); | |
1166 | ||
1167 | goto iospace_error_exit; | |
1168 | } | |
1169 | if (mmio_len < MIN_IOBASE_LEN) { | |
1170 | dev_err(&ha->pdev->dev, | |
1171 | "Invalid PCI mem region size, aborting\n"); | |
1172 | goto iospace_error_exit; | |
1173 | } | |
1174 | ||
1175 | if (pci_request_regions(ha->pdev, DRIVER_NAME)) { | |
1176 | dev_warn(&ha->pdev->dev, | |
1177 | "Failed to reserve PIO/MMIO regions\n"); | |
1178 | ||
1179 | goto iospace_error_exit; | |
1180 | } | |
1181 | ||
1182 | ha->pio_address = pio; | |
1183 | ha->pio_length = pio_len; | |
1184 | ha->reg = ioremap(mmio, MIN_IOBASE_LEN); | |
1185 | if (!ha->reg) { | |
1186 | dev_err(&ha->pdev->dev, | |
1187 | "cannot remap MMIO, aborting\n"); | |
1188 | ||
1189 | goto iospace_error_exit; | |
1190 | } | |
1191 | ||
1192 | return 0; | |
1193 | ||
1194 | iospace_error_exit: | |
1195 | return -ENOMEM; | |
1196 | } | |
1197 | ||
1198 | /** | |
1199 | * qla4xxx_probe_adapter - callback function to probe HBA | |
1200 | * @pdev: pointer to pci_dev structure | |
1201 | * @pci_device_id: pointer to pci_device entry | |
1202 | * | |
1203 | * This routine will probe for Qlogic 4xxx iSCSI host adapters. | |
1204 | * It returns zero if successful. It also initializes all data necessary for | |
1205 | * the driver. | |
1206 | **/ | |
1207 | static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev, | |
1208 | const struct pci_device_id *ent) | |
1209 | { | |
1210 | int ret = -ENODEV, status; | |
1211 | struct Scsi_Host *host; | |
1212 | struct scsi_qla_host *ha; | |
afaf5a2d DS |
1213 | uint8_t init_retry_count = 0; |
1214 | char buf[34]; | |
1215 | ||
1216 | if (pci_enable_device(pdev)) | |
1217 | return -1; | |
1218 | ||
1219 | host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha)); | |
1220 | if (host == NULL) { | |
1221 | printk(KERN_WARNING | |
1222 | "qla4xxx: Couldn't allocate host from scsi layer!\n"); | |
1223 | goto probe_disable_device; | |
1224 | } | |
1225 | ||
1226 | /* Clear our data area */ | |
1227 | ha = (struct scsi_qla_host *) host->hostdata; | |
1228 | memset(ha, 0, sizeof(*ha)); | |
1229 | ||
1230 | /* Save the information from PCI BIOS. */ | |
1231 | ha->pdev = pdev; | |
1232 | ha->host = host; | |
1233 | ha->host_no = host->host_no; | |
1234 | ||
1235 | /* Configure PCI I/O space. */ | |
1236 | ret = qla4xxx_iospace_config(ha); | |
1237 | if (ret) | |
1238 | goto probe_failed; | |
1239 | ||
1240 | dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n", | |
1241 | pdev->device, pdev->irq, ha->reg); | |
1242 | ||
1243 | qla4xxx_config_dma_addressing(ha); | |
1244 | ||
1245 | /* Initialize lists and spinlocks. */ | |
1246 | INIT_LIST_HEAD(&ha->ddb_list); | |
1247 | INIT_LIST_HEAD(&ha->free_srb_q); | |
1248 | ||
1249 | mutex_init(&ha->mbox_sem); | |
afaf5a2d DS |
1250 | |
1251 | spin_lock_init(&ha->hardware_lock); | |
afaf5a2d DS |
1252 | |
1253 | /* Allocate dma buffers */ | |
1254 | if (qla4xxx_mem_alloc(ha)) { | |
1255 | dev_warn(&ha->pdev->dev, | |
1256 | "[ERROR] Failed to allocate memory for adapter\n"); | |
1257 | ||
1258 | ret = -ENOMEM; | |
1259 | goto probe_failed; | |
1260 | } | |
1261 | ||
1262 | /* | |
1263 | * Initialize the Host adapter request/response queues and | |
1264 | * firmware | |
1265 | * NOTE: interrupts enabled upon successful completion | |
1266 | */ | |
1267 | status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST); | |
1268 | while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) { | |
1269 | DEBUG2(printk("scsi: %s: retrying adapter initialization " | |
1270 | "(%d)\n", __func__, init_retry_count)); | |
1271 | qla4xxx_soft_reset(ha); | |
1272 | status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST); | |
1273 | } | |
1274 | if (status == QLA_ERROR) { | |
1275 | dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n"); | |
1276 | ||
1277 | ret = -ENODEV; | |
1278 | goto probe_failed; | |
1279 | } | |
1280 | ||
1281 | host->cmd_per_lun = 3; | |
1282 | host->max_channel = 0; | |
1283 | host->max_lun = MAX_LUNS - 1; | |
1284 | host->max_id = MAX_TARGETS; | |
1285 | host->max_cmd_len = IOCB_MAX_CDB_LEN; | |
1286 | host->can_queue = MAX_SRBS ; | |
1287 | host->transportt = qla4xxx_scsi_transport; | |
1288 | ||
1289 | ret = scsi_init_shared_tag_map(host, MAX_SRBS); | |
1290 | if (ret) { | |
898eb71c | 1291 | dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed\n"); |
afaf5a2d DS |
1292 | goto probe_failed; |
1293 | } | |
1294 | ||
1295 | /* Startup the kernel thread for this host adapter. */ | |
1296 | DEBUG2(printk("scsi: %s: Starting kernel thread for " | |
1297 | "qla4xxx_dpc\n", __func__)); | |
1298 | sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no); | |
1299 | ha->dpc_thread = create_singlethread_workqueue(buf); | |
1300 | if (!ha->dpc_thread) { | |
1301 | dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n"); | |
1302 | ret = -ENODEV; | |
1303 | goto probe_failed; | |
1304 | } | |
c4028958 | 1305 | INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc); |
afaf5a2d DS |
1306 | |
1307 | ret = request_irq(pdev->irq, qla4xxx_intr_handler, | |
38515e90 | 1308 | IRQF_DISABLED | IRQF_SHARED, "qla4xxx", ha); |
afaf5a2d DS |
1309 | if (ret) { |
1310 | dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d" | |
1311 | " already in use.\n", pdev->irq); | |
1312 | goto probe_failed; | |
1313 | } | |
1314 | set_bit(AF_IRQ_ATTACHED, &ha->flags); | |
1315 | host->irq = pdev->irq; | |
1316 | DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq)); | |
1317 | ||
1318 | qla4xxx_enable_intrs(ha); | |
1319 | ||
1320 | /* Start timer thread. */ | |
1321 | qla4xxx_start_timer(ha, qla4xxx_timer, 1); | |
1322 | ||
1323 | set_bit(AF_INIT_DONE, &ha->flags); | |
1324 | ||
1325 | pci_set_drvdata(pdev, ha); | |
1326 | ||
1327 | ret = scsi_add_host(host, &pdev->dev); | |
1328 | if (ret) | |
1329 | goto probe_failed; | |
1330 | ||
afaf5a2d DS |
1331 | printk(KERN_INFO |
1332 | " QLogic iSCSI HBA Driver version: %s\n" | |
1333 | " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n", | |
1334 | qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev), | |
1335 | ha->host_no, ha->firmware_version[0], ha->firmware_version[1], | |
1336 | ha->patch_number, ha->build_number); | |
921601b7 | 1337 | scsi_scan_host(host); |
afaf5a2d DS |
1338 | return 0; |
1339 | ||
afaf5a2d DS |
1340 | probe_failed: |
1341 | qla4xxx_free_adapter(ha); | |
1342 | scsi_host_put(ha->host); | |
1343 | ||
1344 | probe_disable_device: | |
1345 | pci_disable_device(pdev); | |
1346 | ||
1347 | return ret; | |
1348 | } | |
1349 | ||
1350 | /** | |
1351 | * qla4xxx_remove_adapter - calback function to remove adapter. | |
1352 | * @pci_dev: PCI device pointer | |
1353 | **/ | |
1354 | static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev) | |
1355 | { | |
1356 | struct scsi_qla_host *ha; | |
1357 | ||
1358 | ha = pci_get_drvdata(pdev); | |
1359 | ||
bee4fe8e DS |
1360 | qla4xxx_disable_intrs(ha); |
1361 | ||
1362 | while (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) | |
1363 | ssleep(1); | |
1364 | ||
afaf5a2d DS |
1365 | /* remove devs from iscsi_sessions to scsi_devices */ |
1366 | qla4xxx_free_ddb_list(ha); | |
1367 | ||
1368 | scsi_remove_host(ha->host); | |
1369 | ||
1370 | qla4xxx_free_adapter(ha); | |
1371 | ||
1372 | scsi_host_put(ha->host); | |
1373 | ||
1374 | pci_set_drvdata(pdev, NULL); | |
1375 | } | |
1376 | ||
1377 | /** | |
1378 | * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method. | |
1379 | * @ha: HA context | |
1380 | * | |
1381 | * At exit, the @ha's flags.enable_64bit_addressing set to indicated | |
1382 | * supported addressing method. | |
1383 | */ | |
47975477 | 1384 | static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha) |
afaf5a2d DS |
1385 | { |
1386 | int retval; | |
1387 | ||
1388 | /* Update our PCI device dma_mask for full 64 bit mask */ | |
6a35528a YH |
1389 | if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(64)) == 0) { |
1390 | if (pci_set_consistent_dma_mask(ha->pdev, DMA_BIT_MASK(64))) { | |
afaf5a2d DS |
1391 | dev_dbg(&ha->pdev->dev, |
1392 | "Failed to set 64 bit PCI consistent mask; " | |
1393 | "using 32 bit.\n"); | |
1394 | retval = pci_set_consistent_dma_mask(ha->pdev, | |
284901a9 | 1395 | DMA_BIT_MASK(32)); |
afaf5a2d DS |
1396 | } |
1397 | } else | |
284901a9 | 1398 | retval = pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32)); |
afaf5a2d DS |
1399 | } |
1400 | ||
1401 | static int qla4xxx_slave_alloc(struct scsi_device *sdev) | |
1402 | { | |
1403 | struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target); | |
1404 | struct ddb_entry *ddb = sess->dd_data; | |
1405 | ||
1406 | sdev->hostdata = ddb; | |
1407 | sdev->tagged_supported = 1; | |
d510d965 | 1408 | scsi_activate_tcq(sdev, QL4_DEF_QDEPTH); |
afaf5a2d DS |
1409 | return 0; |
1410 | } | |
1411 | ||
1412 | static int qla4xxx_slave_configure(struct scsi_device *sdev) | |
1413 | { | |
1414 | sdev->tagged_supported = 1; | |
1415 | return 0; | |
1416 | } | |
1417 | ||
1418 | static void qla4xxx_slave_destroy(struct scsi_device *sdev) | |
1419 | { | |
1420 | scsi_deactivate_tcq(sdev, 1); | |
1421 | } | |
1422 | ||
1423 | /** | |
1424 | * qla4xxx_del_from_active_array - returns an active srb | |
1425 | * @ha: Pointer to host adapter structure. | |
fd589a8f | 1426 | * @index: index into the active_array |
afaf5a2d DS |
1427 | * |
1428 | * This routine removes and returns the srb at the specified index | |
1429 | **/ | |
1430 | struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index) | |
1431 | { | |
1432 | struct srb *srb = NULL; | |
1433 | struct scsi_cmnd *cmd; | |
1434 | ||
1435 | if (!(cmd = scsi_host_find_tag(ha->host, index))) | |
1436 | return srb; | |
1437 | ||
1438 | if (!(srb = (struct srb *)cmd->host_scribble)) | |
1439 | return srb; | |
1440 | ||
1441 | /* update counters */ | |
1442 | if (srb->flags & SRB_DMA_VALID) { | |
1443 | ha->req_q_count += srb->iocb_cnt; | |
1444 | ha->iocb_cnt -= srb->iocb_cnt; | |
1445 | if (srb->cmd) | |
1446 | srb->cmd->host_scribble = NULL; | |
1447 | } | |
1448 | return srb; | |
1449 | } | |
1450 | ||
afaf5a2d DS |
1451 | /** |
1452 | * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware | |
1453 | * @ha: actual ha whose done queue will contain the comd returned by firmware. | |
1454 | * @cmd: Scsi Command to wait on. | |
1455 | * | |
1456 | * This routine waits for the command to be returned by the Firmware | |
1457 | * for some max time. | |
1458 | **/ | |
1459 | static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha, | |
1460 | struct scsi_cmnd *cmd) | |
1461 | { | |
1462 | int done = 0; | |
1463 | struct srb *rp; | |
1464 | uint32_t max_wait_time = EH_WAIT_CMD_TOV; | |
1465 | ||
1466 | do { | |
1467 | /* Checking to see if its returned to OS */ | |
1468 | rp = (struct srb *) cmd->SCp.ptr; | |
1469 | if (rp == NULL) { | |
1470 | done++; | |
1471 | break; | |
1472 | } | |
1473 | ||
1474 | msleep(2000); | |
1475 | } while (max_wait_time--); | |
1476 | ||
1477 | return done; | |
1478 | } | |
1479 | ||
1480 | /** | |
1481 | * qla4xxx_wait_for_hba_online - waits for HBA to come online | |
1482 | * @ha: Pointer to host adapter structure | |
1483 | **/ | |
1484 | static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha) | |
1485 | { | |
1486 | unsigned long wait_online; | |
1487 | ||
1488 | wait_online = jiffies + (30 * HZ); | |
1489 | while (time_before(jiffies, wait_online)) { | |
1490 | ||
1491 | if (adapter_up(ha)) | |
1492 | return QLA_SUCCESS; | |
1493 | else if (ha->retry_reset_ha_cnt == 0) | |
1494 | return QLA_ERROR; | |
1495 | ||
1496 | msleep(2000); | |
1497 | } | |
1498 | ||
1499 | return QLA_ERROR; | |
1500 | } | |
1501 | ||
1502 | /** | |
ce545039 | 1503 | * qla4xxx_eh_wait_for_commands - wait for active cmds to finish. |
fd589a8f | 1504 | * @ha: pointer to HBA |
afaf5a2d DS |
1505 | * @t: target id |
1506 | * @l: lun id | |
1507 | * | |
1508 | * This function waits for all outstanding commands to a lun to complete. It | |
1509 | * returns 0 if all pending commands are returned and 1 otherwise. | |
1510 | **/ | |
ce545039 MC |
1511 | static int qla4xxx_eh_wait_for_commands(struct scsi_qla_host *ha, |
1512 | struct scsi_target *stgt, | |
1513 | struct scsi_device *sdev) | |
afaf5a2d DS |
1514 | { |
1515 | int cnt; | |
1516 | int status = 0; | |
1517 | struct scsi_cmnd *cmd; | |
1518 | ||
1519 | /* | |
ce545039 MC |
1520 | * Waiting for all commands for the designated target or dev |
1521 | * in the active array | |
afaf5a2d DS |
1522 | */ |
1523 | for (cnt = 0; cnt < ha->host->can_queue; cnt++) { | |
1524 | cmd = scsi_host_find_tag(ha->host, cnt); | |
ce545039 MC |
1525 | if (cmd && stgt == scsi_target(cmd->device) && |
1526 | (!sdev || sdev == cmd->device)) { | |
afaf5a2d DS |
1527 | if (!qla4xxx_eh_wait_on_command(ha, cmd)) { |
1528 | status++; | |
1529 | break; | |
1530 | } | |
1531 | } | |
1532 | } | |
1533 | return status; | |
1534 | } | |
1535 | ||
1536 | /** | |
1537 | * qla4xxx_eh_device_reset - callback for target reset. | |
1538 | * @cmd: Pointer to Linux's SCSI command structure | |
1539 | * | |
1540 | * This routine is called by the Linux OS to reset all luns on the | |
1541 | * specified target. | |
1542 | **/ | |
1543 | static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd) | |
1544 | { | |
1545 | struct scsi_qla_host *ha = to_qla_host(cmd->device->host); | |
1546 | struct ddb_entry *ddb_entry = cmd->device->hostdata; | |
afaf5a2d DS |
1547 | int ret = FAILED, stat; |
1548 | ||
612f7348 | 1549 | if (!ddb_entry) |
afaf5a2d DS |
1550 | return ret; |
1551 | ||
1552 | dev_info(&ha->pdev->dev, | |
1553 | "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no, | |
1554 | cmd->device->channel, cmd->device->id, cmd->device->lun); | |
1555 | ||
1556 | DEBUG2(printk(KERN_INFO | |
1557 | "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x," | |
1558 | "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no, | |
242f9dcb | 1559 | cmd, jiffies, cmd->request->timeout / HZ, |
afaf5a2d DS |
1560 | ha->dpc_flags, cmd->result, cmd->allowed)); |
1561 | ||
1562 | /* FIXME: wait for hba to go online */ | |
1563 | stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun); | |
1564 | if (stat != QLA_SUCCESS) { | |
1565 | dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat); | |
1566 | goto eh_dev_reset_done; | |
1567 | } | |
1568 | ||
ce545039 MC |
1569 | if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device), |
1570 | cmd->device)) { | |
1571 | dev_info(&ha->pdev->dev, | |
1572 | "DEVICE RESET FAILED - waiting for " | |
1573 | "commands.\n"); | |
1574 | goto eh_dev_reset_done; | |
afaf5a2d DS |
1575 | } |
1576 | ||
9d562913 DS |
1577 | /* Send marker. */ |
1578 | if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun, | |
1579 | MM_LUN_RESET) != QLA_SUCCESS) | |
1580 | goto eh_dev_reset_done; | |
1581 | ||
afaf5a2d DS |
1582 | dev_info(&ha->pdev->dev, |
1583 | "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n", | |
1584 | ha->host_no, cmd->device->channel, cmd->device->id, | |
1585 | cmd->device->lun); | |
1586 | ||
1587 | ret = SUCCESS; | |
1588 | ||
1589 | eh_dev_reset_done: | |
1590 | ||
1591 | return ret; | |
1592 | } | |
1593 | ||
ce545039 MC |
1594 | /** |
1595 | * qla4xxx_eh_target_reset - callback for target reset. | |
1596 | * @cmd: Pointer to Linux's SCSI command structure | |
1597 | * | |
1598 | * This routine is called by the Linux OS to reset the target. | |
1599 | **/ | |
1600 | static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd) | |
1601 | { | |
1602 | struct scsi_qla_host *ha = to_qla_host(cmd->device->host); | |
1603 | struct ddb_entry *ddb_entry = cmd->device->hostdata; | |
1604 | int stat; | |
1605 | ||
1606 | if (!ddb_entry) | |
1607 | return FAILED; | |
1608 | ||
1609 | starget_printk(KERN_INFO, scsi_target(cmd->device), | |
1610 | "WARM TARGET RESET ISSUED.\n"); | |
1611 | ||
1612 | DEBUG2(printk(KERN_INFO | |
1613 | "scsi%ld: TARGET_DEVICE_RESET cmd=%p jiffies = 0x%lx, " | |
1614 | "to=%x,dpc_flags=%lx, status=%x allowed=%d\n", | |
242f9dcb | 1615 | ha->host_no, cmd, jiffies, cmd->request->timeout / HZ, |
ce545039 MC |
1616 | ha->dpc_flags, cmd->result, cmd->allowed)); |
1617 | ||
1618 | stat = qla4xxx_reset_target(ha, ddb_entry); | |
1619 | if (stat != QLA_SUCCESS) { | |
1620 | starget_printk(KERN_INFO, scsi_target(cmd->device), | |
1621 | "WARM TARGET RESET FAILED.\n"); | |
1622 | return FAILED; | |
1623 | } | |
1624 | ||
ce545039 MC |
1625 | if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device), |
1626 | NULL)) { | |
1627 | starget_printk(KERN_INFO, scsi_target(cmd->device), | |
1628 | "WARM TARGET DEVICE RESET FAILED - " | |
1629 | "waiting for commands.\n"); | |
1630 | return FAILED; | |
1631 | } | |
1632 | ||
9d562913 DS |
1633 | /* Send marker. */ |
1634 | if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun, | |
1635 | MM_TGT_WARM_RESET) != QLA_SUCCESS) { | |
1636 | starget_printk(KERN_INFO, scsi_target(cmd->device), | |
1637 | "WARM TARGET DEVICE RESET FAILED - " | |
1638 | "marker iocb failed.\n"); | |
1639 | return FAILED; | |
1640 | } | |
1641 | ||
ce545039 MC |
1642 | starget_printk(KERN_INFO, scsi_target(cmd->device), |
1643 | "WARM TARGET RESET SUCCEEDED.\n"); | |
1644 | return SUCCESS; | |
1645 | } | |
1646 | ||
afaf5a2d DS |
1647 | /** |
1648 | * qla4xxx_eh_host_reset - kernel callback | |
1649 | * @cmd: Pointer to Linux's SCSI command structure | |
1650 | * | |
1651 | * This routine is invoked by the Linux kernel to perform fatal error | |
1652 | * recovery on the specified adapter. | |
1653 | **/ | |
1654 | static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd) | |
1655 | { | |
1656 | int return_status = FAILED; | |
1657 | struct scsi_qla_host *ha; | |
1658 | ||
1659 | ha = (struct scsi_qla_host *) cmd->device->host->hostdata; | |
1660 | ||
1661 | dev_info(&ha->pdev->dev, | |
dca05c4c | 1662 | "scsi(%ld:%d:%d:%d): HOST RESET ISSUED.\n", ha->host_no, |
afaf5a2d DS |
1663 | cmd->device->channel, cmd->device->id, cmd->device->lun); |
1664 | ||
1665 | if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) { | |
1666 | DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter " | |
1667 | "DEAD.\n", ha->host_no, cmd->device->channel, | |
1668 | __func__)); | |
1669 | ||
1670 | return FAILED; | |
1671 | } | |
1672 | ||
50a29aec MC |
1673 | /* make sure the dpc thread is stopped while we reset the hba */ |
1674 | clear_bit(AF_ONLINE, &ha->flags); | |
1675 | flush_workqueue(ha->dpc_thread); | |
1676 | ||
1677 | if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS) | |
afaf5a2d | 1678 | return_status = SUCCESS; |
afaf5a2d DS |
1679 | |
1680 | dev_info(&ha->pdev->dev, "HOST RESET %s.\n", | |
1681 | return_status == FAILED ? "FAILED" : "SUCCEDED"); | |
1682 | ||
1683 | return return_status; | |
1684 | } | |
1685 | ||
1686 | ||
1687 | static struct pci_device_id qla4xxx_pci_tbl[] = { | |
1688 | { | |
1689 | .vendor = PCI_VENDOR_ID_QLOGIC, | |
1690 | .device = PCI_DEVICE_ID_QLOGIC_ISP4010, | |
1691 | .subvendor = PCI_ANY_ID, | |
1692 | .subdevice = PCI_ANY_ID, | |
1693 | }, | |
1694 | { | |
1695 | .vendor = PCI_VENDOR_ID_QLOGIC, | |
1696 | .device = PCI_DEVICE_ID_QLOGIC_ISP4022, | |
1697 | .subvendor = PCI_ANY_ID, | |
1698 | .subdevice = PCI_ANY_ID, | |
1699 | }, | |
d915058f DS |
1700 | { |
1701 | .vendor = PCI_VENDOR_ID_QLOGIC, | |
1702 | .device = PCI_DEVICE_ID_QLOGIC_ISP4032, | |
1703 | .subvendor = PCI_ANY_ID, | |
1704 | .subdevice = PCI_ANY_ID, | |
1705 | }, | |
afaf5a2d DS |
1706 | {0, 0}, |
1707 | }; | |
1708 | MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl); | |
1709 | ||
47975477 | 1710 | static struct pci_driver qla4xxx_pci_driver = { |
afaf5a2d DS |
1711 | .name = DRIVER_NAME, |
1712 | .id_table = qla4xxx_pci_tbl, | |
1713 | .probe = qla4xxx_probe_adapter, | |
1714 | .remove = qla4xxx_remove_adapter, | |
1715 | }; | |
1716 | ||
1717 | static int __init qla4xxx_module_init(void) | |
1718 | { | |
1719 | int ret; | |
1720 | ||
1721 | /* Allocate cache for SRBs. */ | |
1722 | srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0, | |
20c2df83 | 1723 | SLAB_HWCACHE_ALIGN, NULL); |
afaf5a2d DS |
1724 | if (srb_cachep == NULL) { |
1725 | printk(KERN_ERR | |
1726 | "%s: Unable to allocate SRB cache..." | |
1727 | "Failing load!\n", DRIVER_NAME); | |
1728 | ret = -ENOMEM; | |
1729 | goto no_srp_cache; | |
1730 | } | |
1731 | ||
1732 | /* Derive version string. */ | |
1733 | strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION); | |
11010fec | 1734 | if (ql4xextended_error_logging) |
afaf5a2d DS |
1735 | strcat(qla4xxx_version_str, "-debug"); |
1736 | ||
1737 | qla4xxx_scsi_transport = | |
1738 | iscsi_register_transport(&qla4xxx_iscsi_transport); | |
1739 | if (!qla4xxx_scsi_transport){ | |
1740 | ret = -ENODEV; | |
1741 | goto release_srb_cache; | |
1742 | } | |
1743 | ||
afaf5a2d DS |
1744 | ret = pci_register_driver(&qla4xxx_pci_driver); |
1745 | if (ret) | |
1746 | goto unregister_transport; | |
1747 | ||
1748 | printk(KERN_INFO "QLogic iSCSI HBA Driver\n"); | |
1749 | return 0; | |
5ae16db3 | 1750 | |
afaf5a2d DS |
1751 | unregister_transport: |
1752 | iscsi_unregister_transport(&qla4xxx_iscsi_transport); | |
1753 | release_srb_cache: | |
1754 | kmem_cache_destroy(srb_cachep); | |
1755 | no_srp_cache: | |
1756 | return ret; | |
1757 | } | |
1758 | ||
1759 | static void __exit qla4xxx_module_exit(void) | |
1760 | { | |
477ffb9d | 1761 | ql4_mod_unload = 1; |
afaf5a2d DS |
1762 | pci_unregister_driver(&qla4xxx_pci_driver); |
1763 | iscsi_unregister_transport(&qla4xxx_iscsi_transport); | |
1764 | kmem_cache_destroy(srb_cachep); | |
1765 | } | |
1766 | ||
1767 | module_init(qla4xxx_module_init); | |
1768 | module_exit(qla4xxx_module_exit); | |
1769 | ||
1770 | MODULE_AUTHOR("QLogic Corporation"); | |
1771 | MODULE_DESCRIPTION("QLogic iSCSI HBA Driver"); | |
1772 | MODULE_LICENSE("GPL"); | |
1773 | MODULE_VERSION(QLA4XXX_DRIVER_VERSION); |