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drm: fix for non-coherent DMA PowerPC
[pohmelfs.git] / drivers / scsi / qla4xxx / ql4_init.c
blob109c5f5985ecfb1772956296a27ea219ee7a01ff
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
8 #include <scsi/iscsi_if.h>
9 #include "ql4_def.h"
10 #include "ql4_glbl.h"
11 #include "ql4_dbg.h"
12 #include "ql4_inline.h"
13
14 static struct ddb_entry * qla4xxx_alloc_ddb(struct scsi_qla_host *ha,
15 uint32_t fw_ddb_index);
16
17 static void ql4xxx_set_mac_number(struct scsi_qla_host *ha)
18 {
19 uint32_t value;
20 uint8_t func_number;
21 unsigned long flags;
22
23 /* Get the function number */
24 spin_lock_irqsave(&ha->hardware_lock, flags);
25 value = readw(&ha->reg->ctrl_status);
26 spin_unlock_irqrestore(&ha->hardware_lock, flags);
27
28 func_number = (uint8_t) ((value >> 4) & 0x30);
29 switch (value & ISP_CONTROL_FN_MASK) {
30 case ISP_CONTROL_FN0_SCSI:
31 ha->mac_index = 1;
32 break;
33 case ISP_CONTROL_FN1_SCSI:
34 ha->mac_index = 3;
35 break;
36 default:
37 DEBUG2(printk("scsi%ld: %s: Invalid function number, "
38 "ispControlStatus = 0x%x\n", ha->host_no,
39 __func__, value));
40 break;
41 }
42 DEBUG2(printk("scsi%ld: %s: mac_index %d.\n", ha->host_no, __func__,
43 ha->mac_index));
44 }
45
46 /**
47 * qla4xxx_free_ddb - deallocate ddb
48 * @ha: pointer to host adapter structure.
49 * @ddb_entry: pointer to device database entry
50 *
51 * This routine deallocates and unlinks the specified ddb_entry from the
52 * adapter's
53 **/
54 static void qla4xxx_free_ddb(struct scsi_qla_host *ha,
55 struct ddb_entry *ddb_entry)
56 {
57 /* Remove device entry from list */
58 list_del_init(&ddb_entry->list);
59
60 /* Remove device pointer from index mapping arrays */
61 ha->fw_ddb_index_map[ddb_entry->fw_ddb_index] =
62 (struct ddb_entry *) INVALID_ENTRY;
63 ha->tot_ddbs--;
64
65 /* Free memory and scsi-ml struct for device entry */
66 qla4xxx_destroy_sess(ddb_entry);
67 }
68
69 /**
70 * qla4xxx_free_ddb_list - deallocate all ddbs
71 * @ha: pointer to host adapter structure.
72 *
73 * This routine deallocates and removes all devices on the sppecified adapter.
74 **/
75 void qla4xxx_free_ddb_list(struct scsi_qla_host *ha)
76 {
77 struct list_head *ptr;
78 struct ddb_entry *ddb_entry;
79
80 while (!list_empty(&ha->ddb_list)) {
81 ptr = ha->ddb_list.next;
82 /* Free memory for device entry and remove */
83 ddb_entry = list_entry(ptr, struct ddb_entry, list);
84 qla4xxx_free_ddb(ha, ddb_entry);
85 }
86 }
87
88 /**
89 * qla4xxx_init_rings - initialize hw queues
90 * @ha: pointer to host adapter structure.
91 *
92 * This routine initializes the internal queues for the specified adapter.
93 * The QLA4010 requires us to restart the queues at index 0.
94 * The QLA4000 doesn't care, so just default to QLA4010's requirement.
95 **/
96 int qla4xxx_init_rings(struct scsi_qla_host *ha)
97 {
98 unsigned long flags = 0;
99
100 /* Initialize request queue. */
101 spin_lock_irqsave(&ha->hardware_lock, flags);
102 ha->request_out = 0;
103 ha->request_in = 0;
104 ha->request_ptr = &ha->request_ring[ha->request_in];
105 ha->req_q_count = REQUEST_QUEUE_DEPTH;
106
107 /* Initialize response queue. */
108 ha->response_in = 0;
109 ha->response_out = 0;
110 ha->response_ptr = &ha->response_ring[ha->response_out];
111
112 /*
113 * Initialize DMA Shadow registers. The firmware is really supposed to
114 * take care of this, but on some uniprocessor systems, the shadow
115 * registers aren't cleared-- causing the interrupt_handler to think
116 * there are responses to be processed when there aren't.
117 */
118 ha->shadow_regs->req_q_out = __constant_cpu_to_le32(0);
119 ha->shadow_regs->rsp_q_in = __constant_cpu_to_le32(0);
120 wmb();
121
122 writel(0, &ha->reg->req_q_in);
123 writel(0, &ha->reg->rsp_q_out);
124 readl(&ha->reg->rsp_q_out);
125
126 spin_unlock_irqrestore(&ha->hardware_lock, flags);
127
128 return QLA_SUCCESS;
129 }
130
131 /**
132 * qla4xxx_validate_mac_address - validate adapter MAC address(es)
133 * @ha: pointer to host adapter structure.
134 *
135 **/
136 static int qla4xxx_validate_mac_address(struct scsi_qla_host *ha)
137 {
138 struct flash_sys_info *sys_info;
139 dma_addr_t sys_info_dma;
140 int status = QLA_ERROR;
141
142 sys_info = dma_alloc_coherent(&ha->pdev->dev, sizeof(*sys_info),
143 &sys_info_dma, GFP_KERNEL);
144 if (sys_info == NULL) {
145 DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
146 ha->host_no, __func__));
147
148 goto exit_validate_mac_no_free;
149 }
150 memset(sys_info, 0, sizeof(*sys_info));
151
152 /* Get flash sys info */
153 if (qla4xxx_get_flash(ha, sys_info_dma, FLASH_OFFSET_SYS_INFO,
154 sizeof(*sys_info)) != QLA_SUCCESS) {
155 DEBUG2(printk("scsi%ld: %s: get_flash FLASH_OFFSET_SYS_INFO "
156 "failed\n", ha->host_no, __func__));
157
158 goto exit_validate_mac;
159 }
160
161 /* Save M.A.C. address & serial_number */
162 memcpy(ha->my_mac, &sys_info->physAddr[0].address[0],
163 min(sizeof(ha->my_mac),
164 sizeof(sys_info->physAddr[0].address)));
165 memcpy(ha->serial_number, &sys_info->acSerialNumber,
166 min(sizeof(ha->serial_number),
167 sizeof(sys_info->acSerialNumber)));
168
169 status = QLA_SUCCESS;
170
171 exit_validate_mac:
172 dma_free_coherent(&ha->pdev->dev, sizeof(*sys_info), sys_info,
173 sys_info_dma);
174
175 exit_validate_mac_no_free:
176 return status;
177 }
178
179 /**
180 * qla4xxx_init_local_data - initialize adapter specific local data
181 * @ha: pointer to host adapter structure.
182 *
183 **/
184 static int qla4xxx_init_local_data(struct scsi_qla_host *ha)
185 {
186 /* Initilize aen queue */
187 ha->aen_q_count = MAX_AEN_ENTRIES;
188
189 return qla4xxx_get_firmware_status(ha);
190 }
191
192 static int qla4xxx_fw_ready(struct scsi_qla_host *ha)
193 {
194 uint32_t timeout_count;
195 int ready = 0;
196
197 DEBUG2(dev_info(&ha->pdev->dev, "Waiting for Firmware Ready..\n"));
198 for (timeout_count = ADAPTER_INIT_TOV; timeout_count > 0;
199 timeout_count--) {
200 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
201 qla4xxx_get_dhcp_ip_address(ha);
202
203 /* Get firmware state. */
204 if (qla4xxx_get_firmware_state(ha) != QLA_SUCCESS) {
205 DEBUG2(printk("scsi%ld: %s: unable to get firmware "
206 "state\n", ha->host_no, __func__));
207 break;
208
209 }
210
211 if (ha->firmware_state & FW_STATE_ERROR) {
212 DEBUG2(printk("scsi%ld: %s: an unrecoverable error has"
213 " occurred\n", ha->host_no, __func__));
214 break;
215
216 }
217 if (ha->firmware_state & FW_STATE_CONFIG_WAIT) {
218 /*
219 * The firmware has not yet been issued an Initialize
220 * Firmware command, so issue it now.
221 */
222 if (qla4xxx_initialize_fw_cb(ha) == QLA_ERROR)
223 break;
224
225 /* Go back and test for ready state - no wait. */
226 continue;
227 }
228
229 if (ha->firmware_state == FW_STATE_READY) {
230 DEBUG2(dev_info(&ha->pdev->dev, "Firmware Ready..\n"));
231 /* The firmware is ready to process SCSI commands. */
232 DEBUG2(dev_info(&ha->pdev->dev,
233 "scsi%ld: %s: MEDIA TYPE - %s\n",
234 ha->host_no,
235 __func__, (ha->addl_fw_state &
236 FW_ADDSTATE_OPTICAL_MEDIA)
237 != 0 ? "OPTICAL" : "COPPER"));
238 DEBUG2(dev_info(&ha->pdev->dev,
239 "scsi%ld: %s: DHCP STATE Enabled "
240 "%s\n",
241 ha->host_no, __func__,
242 (ha->addl_fw_state &
243 FW_ADDSTATE_DHCP_ENABLED) != 0 ?
244 "YES" : "NO"));
245 DEBUG2(dev_info(&ha->pdev->dev,
246 "scsi%ld: %s: LINK %s\n",
247 ha->host_no, __func__,
248 (ha->addl_fw_state &
249 FW_ADDSTATE_LINK_UP) != 0 ?
250 "UP" : "DOWN"));
251 DEBUG2(dev_info(&ha->pdev->dev,
252 "scsi%ld: %s: iSNS Service "
253 "Started %s\n",
254 ha->host_no, __func__,
255 (ha->addl_fw_state &
256 FW_ADDSTATE_ISNS_SVC_ENABLED) != 0 ?
257 "YES" : "NO"));
258
259 ready = 1;
260 break;
261 }
262 DEBUG2(printk("scsi%ld: %s: waiting on fw, state=%x:%x - "
263 "seconds expired= %d\n", ha->host_no, __func__,
264 ha->firmware_state, ha->addl_fw_state,
265 timeout_count));
266 if (is_qla4032(ha) &&
267 !(ha->addl_fw_state & FW_ADDSTATE_LINK_UP) &&
268 (timeout_count < ADAPTER_INIT_TOV - 5)) {
269 break;
270 }
271
272 msleep(1000);
273 } /* end of for */
274
275 if (timeout_count == 0)
276 DEBUG2(printk("scsi%ld: %s: FW Initialization timed out!\n",
277 ha->host_no, __func__));
278
279 if (ha->firmware_state & FW_STATE_DHCP_IN_PROGRESS) {
280 DEBUG2(printk("scsi%ld: %s: FW is reporting its waiting to"
281 " grab an IP address from DHCP server\n",
282 ha->host_no, __func__));
283 ready = 1;
284 }
285
286 return ready;
287 }
288
289 /**
290 * qla4xxx_init_firmware - initializes the firmware.
291 * @ha: pointer to host adapter structure.
292 *
293 **/
294 static int qla4xxx_init_firmware(struct scsi_qla_host *ha)
295 {
296 int status = QLA_ERROR;
297
298 dev_info(&ha->pdev->dev, "Initializing firmware..\n");
299 if (qla4xxx_initialize_fw_cb(ha) == QLA_ERROR) {
300 DEBUG2(printk("scsi%ld: %s: Failed to initialize firmware "
301 "control block\n", ha->host_no, __func__));
302 return status;
303 }
304 if (!qla4xxx_fw_ready(ha))
305 return status;
306
307 return qla4xxx_get_firmware_status(ha);
308 }
309
310 static struct ddb_entry* qla4xxx_get_ddb_entry(struct scsi_qla_host *ha,
311 uint32_t fw_ddb_index,
312 uint32_t *new_tgt)
313 {
314 struct dev_db_entry *fw_ddb_entry = NULL;
315 dma_addr_t fw_ddb_entry_dma;
316 struct ddb_entry *ddb_entry = NULL;
317 int found = 0;
318 uint32_t device_state;
319
320 *new_tgt = 0;
321 /* Make sure the dma buffer is valid */
322 fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev,
323 sizeof(*fw_ddb_entry),
324 &fw_ddb_entry_dma, GFP_KERNEL);
325 if (fw_ddb_entry == NULL) {
326 DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
327 ha->host_no, __func__));
328 return NULL;
329 }
330
331 if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index, fw_ddb_entry,
332 fw_ddb_entry_dma, NULL, NULL,
333 &device_state, NULL, NULL, NULL) ==
334 QLA_ERROR) {
335 DEBUG2(printk("scsi%ld: %s: failed get_ddb_entry for "
336 "fw_ddb_index %d\n", ha->host_no, __func__,
337 fw_ddb_index));
338 return NULL;
339 }
340
341 /* Allocate DDB if not already allocated. */
342 DEBUG2(printk("scsi%ld: %s: Looking for ddb[%d]\n", ha->host_no,
343 __func__, fw_ddb_index));
344 list_for_each_entry(ddb_entry, &ha->ddb_list, list) {
345 if (memcmp(ddb_entry->iscsi_name, fw_ddb_entry->iscsi_name,
346 ISCSI_NAME_SIZE) == 0) {
347 found++;
348 break;
349 }
350 }
351
352 if (!found) {
353 DEBUG2(printk("scsi%ld: %s: ddb[%d] not found - allocating "
354 "new ddb\n", ha->host_no, __func__,
355 fw_ddb_index));
356 *new_tgt = 1;
357 ddb_entry = qla4xxx_alloc_ddb(ha, fw_ddb_index);
358 }
359
360 /* if not found allocate new ddb */
361 dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry), fw_ddb_entry,
362 fw_ddb_entry_dma);
363
364 return ddb_entry;
365 }
366
367 /**
368 * qla4xxx_update_ddb_entry - update driver's internal ddb
369 * @ha: pointer to host adapter structure.
370 * @ddb_entry: pointer to device database structure to be filled
371 * @fw_ddb_index: index of the ddb entry in fw ddb table
372 *
373 * This routine updates the driver's internal device database entry
374 * with information retrieved from the firmware's device database
375 * entry for the specified device. The ddb_entry->fw_ddb_index field
376 * must be initialized prior to calling this routine
377 *
378 **/
379 static int qla4xxx_update_ddb_entry(struct scsi_qla_host *ha,
380 struct ddb_entry *ddb_entry,
381 uint32_t fw_ddb_index)
382 {
383 struct dev_db_entry *fw_ddb_entry = NULL;
384 dma_addr_t fw_ddb_entry_dma;
385 int status = QLA_ERROR;
386
387 if (ddb_entry == NULL) {
388 DEBUG2(printk("scsi%ld: %s: ddb_entry is NULL\n", ha->host_no,
389 __func__));
390 goto exit_update_ddb;
391 }
392
393 /* Make sure the dma buffer is valid */
394 fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev,
395 sizeof(*fw_ddb_entry),
396 &fw_ddb_entry_dma, GFP_KERNEL);
397 if (fw_ddb_entry == NULL) {
398 DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
399 ha->host_no, __func__));
400
401 goto exit_update_ddb;
402 }
403
404 if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index, fw_ddb_entry,
405 fw_ddb_entry_dma, NULL, NULL,
406 &ddb_entry->fw_ddb_device_state, NULL,
407 &ddb_entry->tcp_source_port_num,
408 &ddb_entry->connection_id) ==
409 QLA_ERROR) {
410 DEBUG2(printk("scsi%ld: %s: failed get_ddb_entry for "
411 "fw_ddb_index %d\n", ha->host_no, __func__,
412 fw_ddb_index));
413
414 goto exit_update_ddb;
415 }
416
417 status = QLA_SUCCESS;
418 ddb_entry->target_session_id = le16_to_cpu(fw_ddb_entry->tsid);
419 ddb_entry->task_mgmt_timeout =
420 le16_to_cpu(fw_ddb_entry->def_timeout);
421 ddb_entry->CmdSn = 0;
422 ddb_entry->exe_throttle = le16_to_cpu(fw_ddb_entry->exec_throttle);
423 ddb_entry->default_relogin_timeout =
424 le16_to_cpu(fw_ddb_entry->def_timeout);
425 ddb_entry->default_time2wait = le16_to_cpu(fw_ddb_entry->iscsi_def_time2wait);
426
427 /* Update index in case it changed */
428 ddb_entry->fw_ddb_index = fw_ddb_index;
429 ha->fw_ddb_index_map[fw_ddb_index] = ddb_entry;
430
431 ddb_entry->port = le16_to_cpu(fw_ddb_entry->port);
432 ddb_entry->tpgt = le32_to_cpu(fw_ddb_entry->tgt_portal_grp);
433 memcpy(&ddb_entry->iscsi_name[0], &fw_ddb_entry->iscsi_name[0],
434 min(sizeof(ddb_entry->iscsi_name),
435 sizeof(fw_ddb_entry->iscsi_name)));
436 memcpy(&ddb_entry->ip_addr[0], &fw_ddb_entry->ip_addr[0],
437 min(sizeof(ddb_entry->ip_addr), sizeof(fw_ddb_entry->ip_addr)));
438
439 DEBUG2(printk("scsi%ld: %s: ddb[%d] - State= %x status= %d.\n",
440 ha->host_no, __func__, fw_ddb_index,
441 ddb_entry->fw_ddb_device_state, status));
442
443 exit_update_ddb:
444 if (fw_ddb_entry)
445 dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
446 fw_ddb_entry, fw_ddb_entry_dma);
447
448 return status;
449 }
450
451 /**
452 * qla4xxx_alloc_ddb - allocate device database entry
453 * @ha: Pointer to host adapter structure.
454 * @fw_ddb_index: Firmware's device database index
455 *
456 * This routine allocates a ddb_entry, ititializes some values, and
457 * inserts it into the ddb list.
458 **/
459 static struct ddb_entry * qla4xxx_alloc_ddb(struct scsi_qla_host *ha,
460 uint32_t fw_ddb_index)
461 {
462 struct ddb_entry *ddb_entry;
463
464 DEBUG2(printk("scsi%ld: %s: fw_ddb_index [%d]\n", ha->host_no,
465 __func__, fw_ddb_index));
466
467 ddb_entry = qla4xxx_alloc_sess(ha);
468 if (ddb_entry == NULL) {
469 DEBUG2(printk("scsi%ld: %s: Unable to allocate memory "
470 "to add fw_ddb_index [%d]\n",
471 ha->host_no, __func__, fw_ddb_index));
472 return ddb_entry;
473 }
474
475 ddb_entry->fw_ddb_index = fw_ddb_index;
476 atomic_set(&ddb_entry->port_down_timer, ha->port_down_retry_count);
477 atomic_set(&ddb_entry->retry_relogin_timer, INVALID_ENTRY);
478 atomic_set(&ddb_entry->relogin_timer, 0);
479 atomic_set(&ddb_entry->relogin_retry_count, 0);
480 atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
481 list_add_tail(&ddb_entry->list, &ha->ddb_list);
482 ha->fw_ddb_index_map[fw_ddb_index] = ddb_entry;
483 ha->tot_ddbs++;
484
485 return ddb_entry;
486 }
487
488 /**
489 * qla4xxx_configure_ddbs - builds driver ddb list
490 * @ha: Pointer to host adapter structure.
491 *
492 * This routine searches for all valid firmware ddb entries and builds
493 * an internal ddb list. Ddbs that are considered valid are those with
494 * a device state of SESSION_ACTIVE.
495 **/
496 static int qla4xxx_build_ddb_list(struct scsi_qla_host *ha)
497 {
498 int status = QLA_SUCCESS;
499 uint32_t fw_ddb_index = 0;
500 uint32_t next_fw_ddb_index = 0;
501 uint32_t ddb_state;
502 uint32_t conn_err, err_code;
503 struct ddb_entry *ddb_entry;
504 uint32_t new_tgt;
505
506 dev_info(&ha->pdev->dev, "Initializing DDBs ...\n");
507 for (fw_ddb_index = 0; fw_ddb_index < MAX_DDB_ENTRIES;
508 fw_ddb_index = next_fw_ddb_index) {
509 /* First, let's see if a device exists here */
510 if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index, NULL, 0, NULL,
511 &next_fw_ddb_index, &ddb_state,
512 &conn_err, NULL, NULL) ==
513 QLA_ERROR) {
514 DEBUG2(printk("scsi%ld: %s: get_ddb_entry, "
515 "fw_ddb_index %d failed", ha->host_no,
516 __func__, fw_ddb_index));
517 return QLA_ERROR;
518 }
519
520 DEBUG2(printk("scsi%ld: %s: Getting DDB[%d] ddbstate=0x%x, "
521 "next_fw_ddb_index=%d.\n", ha->host_no, __func__,
522 fw_ddb_index, ddb_state, next_fw_ddb_index));
523
524 /* Issue relogin, if necessary. */
525 if (ddb_state == DDB_DS_SESSION_FAILED ||
526 ddb_state == DDB_DS_NO_CONNECTION_ACTIVE) {
527 /* Try and login to device */
528 DEBUG2(printk("scsi%ld: %s: Login to DDB[%d]\n",
529 ha->host_no, __func__, fw_ddb_index));
530 err_code = ((conn_err & 0x00ff0000) >> 16);
531 if (err_code == 0x1c || err_code == 0x06) {
532 DEBUG2(printk("scsi%ld: %s send target "
533 "completed "
534 "or access denied failure\n",
535 ha->host_no, __func__));
536 } else {
537 qla4xxx_set_ddb_entry(ha, fw_ddb_index, 0);
538 if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index,
539 NULL, 0, NULL, &next_fw_ddb_index,
540 &ddb_state, &conn_err, NULL, NULL)
541 == QLA_ERROR) {
542 DEBUG2(printk("scsi%ld: %s:"
543 "get_ddb_entry %d failed\n",
544 ha->host_no,
545 __func__, fw_ddb_index));
546 return QLA_ERROR;
547 }
548 }
549 }
550
551 if (ddb_state != DDB_DS_SESSION_ACTIVE)
552 goto next_one;
553 /*
554 * if fw_ddb with session active state found,
555 * add to ddb_list
556 */
557 DEBUG2(printk("scsi%ld: %s: DDB[%d] added to list\n",
558 ha->host_no, __func__, fw_ddb_index));
559
560 /* Add DDB to internal our ddb list. */
561 ddb_entry = qla4xxx_get_ddb_entry(ha, fw_ddb_index, &new_tgt);
562 if (ddb_entry == NULL) {
563 DEBUG2(printk("scsi%ld: %s: Unable to allocate memory "
564 "for device at fw_ddb_index %d\n",
565 ha->host_no, __func__, fw_ddb_index));
566 return QLA_ERROR;
567 }
568 /* Fill in the device structure */
569 if (qla4xxx_update_ddb_entry(ha, ddb_entry, fw_ddb_index) ==
570 QLA_ERROR) {
571 ha->fw_ddb_index_map[fw_ddb_index] =
572 (struct ddb_entry *)INVALID_ENTRY;
573
574
575 DEBUG2(printk("scsi%ld: %s: update_ddb_entry failed "
576 "for fw_ddb_index %d.\n",
577 ha->host_no, __func__, fw_ddb_index));
578 return QLA_ERROR;
579 }
580
581 next_one:
582 /* We know we've reached the last device when
583 * next_fw_ddb_index is 0 */
584 if (next_fw_ddb_index == 0)
585 break;
586 }
587
588 dev_info(&ha->pdev->dev, "DDB list done..\n");
589
590 return status;
591 }
592
593 struct qla4_relog_scan {
594 int halt_wait;
595 uint32_t conn_err;
596 uint32_t err_code;
597 uint32_t fw_ddb_index;
598 uint32_t next_fw_ddb_index;
599 uint32_t fw_ddb_device_state;
600 };
601
602 static int qla4_test_rdy(struct scsi_qla_host *ha, struct qla4_relog_scan *rs)
603 {
604 struct ddb_entry *ddb_entry;
605
606 /*
607 * Don't want to do a relogin if connection
608 * error is 0x1c.
609 */
610 rs->err_code = ((rs->conn_err & 0x00ff0000) >> 16);
611 if (rs->err_code == 0x1c || rs->err_code == 0x06) {
612 DEBUG2(printk(
613 "scsi%ld: %s send target"
614 " completed or "
615 "access denied failure\n",
616 ha->host_no, __func__));
617 } else {
618 /* We either have a device that is in
619 * the process of relogging in or a
620 * device that is waiting to be
621 * relogged in */
622 rs->halt_wait = 0;
623
624 ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha,
625 rs->fw_ddb_index);
626 if (ddb_entry == NULL)
627 return QLA_ERROR;
628
629 if (ddb_entry->dev_scan_wait_to_start_relogin != 0
630 && time_after_eq(jiffies,
631 ddb_entry->
632 dev_scan_wait_to_start_relogin))
633 {
634 ddb_entry->dev_scan_wait_to_start_relogin = 0;
635 qla4xxx_set_ddb_entry(ha, rs->fw_ddb_index, 0);
636 }
637 }
638 return QLA_SUCCESS;
639 }
640
641 static int qla4_scan_for_relogin(struct scsi_qla_host *ha,
642 struct qla4_relog_scan *rs)
643 {
644 int error;
645
646 /* scan for relogins
647 * ----------------- */
648 for (rs->fw_ddb_index = 0; rs->fw_ddb_index < MAX_DDB_ENTRIES;
649 rs->fw_ddb_index = rs->next_fw_ddb_index) {
650 if (qla4xxx_get_fwddb_entry(ha, rs->fw_ddb_index, NULL, 0,
651 NULL, &rs->next_fw_ddb_index,
652 &rs->fw_ddb_device_state,
653 &rs->conn_err, NULL, NULL)
654 == QLA_ERROR)
655 return QLA_ERROR;
656
657 if (rs->fw_ddb_device_state == DDB_DS_LOGIN_IN_PROCESS)
658 rs->halt_wait = 0;
659
660 if (rs->fw_ddb_device_state == DDB_DS_SESSION_FAILED ||
661 rs->fw_ddb_device_state == DDB_DS_NO_CONNECTION_ACTIVE) {
662 error = qla4_test_rdy(ha, rs);
663 if (error)
664 return error;
665 }
666
667 /* We know we've reached the last device when
668 * next_fw_ddb_index is 0 */
669 if (rs->next_fw_ddb_index == 0)
670 break;
671 }
672 return QLA_SUCCESS;
673 }
674
675 /**
676 * qla4xxx_devices_ready - wait for target devices to be logged in
677 * @ha: pointer to adapter structure
678 *
679 * This routine waits up to ql4xdiscoverywait seconds
680 * F/W database during driver load time.
681 **/
682 static int qla4xxx_devices_ready(struct scsi_qla_host *ha)
683 {
684 int error;
685 unsigned long discovery_wtime;
686 struct qla4_relog_scan rs;
687
688 discovery_wtime = jiffies + (ql4xdiscoverywait * HZ);
689
690 DEBUG(printk("Waiting (%d) for devices ...\n", ql4xdiscoverywait));
691 do {
692 /* poll for AEN. */
693 qla4xxx_get_firmware_state(ha);
694 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags)) {
695 /* Set time-between-relogin timer */
696 qla4xxx_process_aen(ha, RELOGIN_DDB_CHANGED_AENS);
697 }
698
699 /* if no relogins active or needed, halt discvery wait */
700 rs.halt_wait = 1;
701
702 error = qla4_scan_for_relogin(ha, &rs);
703
704 if (rs.halt_wait) {
705 DEBUG2(printk("scsi%ld: %s: Delay halted. Devices "
706 "Ready.\n", ha->host_no, __func__));
707 return QLA_SUCCESS;
708 }
709
710 msleep(2000);
711 } while (!time_after_eq(jiffies, discovery_wtime));
712
713 DEBUG3(qla4xxx_get_conn_event_log(ha));
714
715 return QLA_SUCCESS;
716 }
717
718 static void qla4xxx_flush_AENS(struct scsi_qla_host *ha)
719 {
720 unsigned long wtime;
721
722 /* Flush the 0x8014 AEN from the firmware as a result of
723 * Auto connect. We are basically doing get_firmware_ddb()
724 * to determine whether we need to log back in or not.
725 * Trying to do a set ddb before we have processed 0x8014
726 * will result in another set_ddb() for the same ddb. In other
727 * words there will be stale entries in the aen_q.
728 */
729 wtime = jiffies + (2 * HZ);
730 do {
731 if (qla4xxx_get_firmware_state(ha) == QLA_SUCCESS)
732 if (ha->firmware_state & (BIT_2 | BIT_0))
733 return;
734
735 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
736 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
737
738 msleep(1000);
739 } while (!time_after_eq(jiffies, wtime));
740
741 }
742
743 static int qla4xxx_initialize_ddb_list(struct scsi_qla_host *ha)
744 {
745 uint16_t fw_ddb_index;
746 int status = QLA_SUCCESS;
747
748 /* free the ddb list if is not empty */
749 if (!list_empty(&ha->ddb_list))
750 qla4xxx_free_ddb_list(ha);
751
752 for (fw_ddb_index = 0; fw_ddb_index < MAX_DDB_ENTRIES; fw_ddb_index++)
753 ha->fw_ddb_index_map[fw_ddb_index] =
754 (struct ddb_entry *)INVALID_ENTRY;
755
756 ha->tot_ddbs = 0;
757
758 qla4xxx_flush_AENS(ha);
759
760 /*
761 * First perform device discovery for active
762 * fw ddb indexes and build
763 * ddb list.
764 */
765 if ((status = qla4xxx_build_ddb_list(ha)) == QLA_ERROR)
766 return status;
767
768 /* Wait for an AEN */
769 qla4xxx_devices_ready(ha);
770
771 /*
772 * Targets can come online after the inital discovery, so processing
773 * the aens here will catch them.
774 */
775 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
776 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
777
778 return status;
779 }
780
781 /**
782 * qla4xxx_update_ddb_list - update the driver ddb list
783 * @ha: pointer to host adapter structure.
784 *
785 * This routine obtains device information from the F/W database after
786 * firmware or adapter resets. The device table is preserved.
787 **/
788 int qla4xxx_reinitialize_ddb_list(struct scsi_qla_host *ha)
789 {
790 int status = QLA_SUCCESS;
791 struct ddb_entry *ddb_entry, *detemp;
792
793 /* Update the device information for all devices. */
794 list_for_each_entry_safe(ddb_entry, detemp, &ha->ddb_list, list) {
795 qla4xxx_update_ddb_entry(ha, ddb_entry,
796 ddb_entry->fw_ddb_index);
797 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) {
798 atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
799 DEBUG2(printk ("scsi%ld: %s: ddb index [%d] marked "
800 "ONLINE\n", ha->host_no, __func__,
801 ddb_entry->fw_ddb_index));
802 } else if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
803 qla4xxx_mark_device_missing(ha, ddb_entry);
804 }
805 return status;
806 }
807
808 /**
809 * qla4xxx_relogin_device - re-establish session
810 * @ha: Pointer to host adapter structure.
811 * @ddb_entry: Pointer to device database entry
812 *
813 * This routine does a session relogin with the specified device.
814 * The ddb entry must be assigned prior to making this call.
815 **/
816 int qla4xxx_relogin_device(struct scsi_qla_host *ha,
817 struct ddb_entry * ddb_entry)
818 {
819 uint16_t relogin_timer;
820
821 relogin_timer = max(ddb_entry->default_relogin_timeout,
822 (uint16_t)RELOGIN_TOV);
823 atomic_set(&ddb_entry->relogin_timer, relogin_timer);
824
825 DEBUG2(printk("scsi%ld: Relogin index [%d]. TOV=%d\n", ha->host_no,
826 ddb_entry->fw_ddb_index, relogin_timer));
827
828 qla4xxx_set_ddb_entry(ha, ddb_entry->fw_ddb_index, 0);
829
830 return QLA_SUCCESS;
831 }
832
833 static int qla4xxx_config_nvram(struct scsi_qla_host *ha)
834 {
835 unsigned long flags;
836 union external_hw_config_reg extHwConfig;
837
838 DEBUG2(printk("scsi%ld: %s: Get EEProm parameters \n", ha->host_no,
839 __func__));
840 if (ql4xxx_lock_flash(ha) != QLA_SUCCESS)
841 return (QLA_ERROR);
842 if (ql4xxx_lock_nvram(ha) != QLA_SUCCESS) {
843 ql4xxx_unlock_flash(ha);
844 return (QLA_ERROR);
845 }
846
847 /* Get EEPRom Parameters from NVRAM and validate */
848 dev_info(&ha->pdev->dev, "Configuring NVRAM ...\n");
849 if (qla4xxx_is_nvram_configuration_valid(ha) == QLA_SUCCESS) {
850 spin_lock_irqsave(&ha->hardware_lock, flags);
851 extHwConfig.Asuint32_t =
852 rd_nvram_word(ha, eeprom_ext_hw_conf_offset(ha));
853 spin_unlock_irqrestore(&ha->hardware_lock, flags);
854 } else {
855 /*
856 * QLogic adapters should always have a valid NVRAM.
857 * If not valid, do not load.
858 */
859 dev_warn(&ha->pdev->dev,
860 "scsi%ld: %s: EEProm checksum invalid. "
861 "Please update your EEPROM\n", ha->host_no,
862 __func__);
863
864 /* set defaults */
865 if (is_qla4010(ha))
866 extHwConfig.Asuint32_t = 0x1912;
867 else if (is_qla4022(ha) | is_qla4032(ha))
868 extHwConfig.Asuint32_t = 0x0023;
869 }
870 DEBUG(printk("scsi%ld: %s: Setting extHwConfig to 0xFFFF%04x\n",
871 ha->host_no, __func__, extHwConfig.Asuint32_t));
872
873 spin_lock_irqsave(&ha->hardware_lock, flags);
874 writel((0xFFFF << 16) | extHwConfig.Asuint32_t, isp_ext_hw_conf(ha));
875 readl(isp_ext_hw_conf(ha));
876 spin_unlock_irqrestore(&ha->hardware_lock, flags);
877
878 ql4xxx_unlock_nvram(ha);
879 ql4xxx_unlock_flash(ha);
880
881 return (QLA_SUCCESS);
882 }
883
884 static void qla4x00_pci_config(struct scsi_qla_host *ha)
885 {
886 uint16_t w;
887 int status;
888
889 dev_info(&ha->pdev->dev, "Configuring PCI space...\n");
890
891 pci_set_master(ha->pdev);
892 status = pci_set_mwi(ha->pdev);
893 /*
894 * We want to respect framework's setting of PCI configuration space
895 * command register and also want to make sure that all bits of
896 * interest to us are properly set in command register.
897 */
898 pci_read_config_word(ha->pdev, PCI_COMMAND, &w);
899 w |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
900 w &= ~PCI_COMMAND_INTX_DISABLE;
901 pci_write_config_word(ha->pdev, PCI_COMMAND, w);
902 }
903
904 static int qla4xxx_start_firmware_from_flash(struct scsi_qla_host *ha)
905 {
906 int status = QLA_ERROR;
907 uint32_t max_wait_time;
908 unsigned long flags;
909 uint32_t mbox_status;
910
911 dev_info(&ha->pdev->dev, "Starting firmware ...\n");
912
913 /*
914 * Start firmware from flash ROM
915 *
916 * WORKAROUND: Stuff a non-constant value that the firmware can
917 * use as a seed for a random number generator in MB7 prior to
918 * setting BOOT_ENABLE. Fixes problem where the TCP
919 * connections use the same TCP ports after each reboot,
920 * causing some connections to not get re-established.
921 */
922 DEBUG(printk("scsi%d: %s: Start firmware from flash ROM\n",
923 ha->host_no, __func__));
924
925 spin_lock_irqsave(&ha->hardware_lock, flags);
926 writel(jiffies, &ha->reg->mailbox[7]);
927 if (is_qla4022(ha) | is_qla4032(ha))
928 writel(set_rmask(NVR_WRITE_ENABLE),
929 &ha->reg->u1.isp4022.nvram);
930
931 writel(2, &ha->reg->mailbox[6]);
932 readl(&ha->reg->mailbox[6]);
933
934 writel(set_rmask(CSR_BOOT_ENABLE), &ha->reg->ctrl_status);
935 readl(&ha->reg->ctrl_status);
936 spin_unlock_irqrestore(&ha->hardware_lock, flags);
937
938 /* Wait for firmware to come UP. */
939 max_wait_time = FIRMWARE_UP_TOV * 4;
940 do {
941 uint32_t ctrl_status;
942
943 spin_lock_irqsave(&ha->hardware_lock, flags);
944 ctrl_status = readw(&ha->reg->ctrl_status);
945 mbox_status = readw(&ha->reg->mailbox[0]);
946 spin_unlock_irqrestore(&ha->hardware_lock, flags);
947
948 if (ctrl_status & set_rmask(CSR_SCSI_PROCESSOR_INTR))
949 break;
950 if (mbox_status == MBOX_STS_COMMAND_COMPLETE)
951 break;
952
953 DEBUG2(printk("scsi%ld: %s: Waiting for boot firmware to "
954 "complete... ctrl_sts=0x%x, remaining=%d\n",
955 ha->host_no, __func__, ctrl_status,
956 max_wait_time));
957
958 msleep(250);
959 } while ((max_wait_time--));
960
961 if (mbox_status == MBOX_STS_COMMAND_COMPLETE) {
962 DEBUG(printk("scsi%ld: %s: Firmware has started\n",
963 ha->host_no, __func__));
964
965 spin_lock_irqsave(&ha->hardware_lock, flags);
966 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
967 &ha->reg->ctrl_status);
968 readl(&ha->reg->ctrl_status);
969 spin_unlock_irqrestore(&ha->hardware_lock, flags);
970
971 status = QLA_SUCCESS;
972 } else {
973 printk(KERN_INFO "scsi%ld: %s: Boot firmware failed "
974 "- mbox status 0x%x\n", ha->host_no, __func__,
975 mbox_status);
976 status = QLA_ERROR;
977 }
978 return status;
979 }
980
981 int ql4xxx_lock_drvr_wait(struct scsi_qla_host *a)
982 {
983 #define QL4_LOCK_DRVR_WAIT 60
984 #define QL4_LOCK_DRVR_SLEEP 1
985
986 int drvr_wait = QL4_LOCK_DRVR_WAIT;
987 while (drvr_wait) {
988 if (ql4xxx_lock_drvr(a) == 0) {
989 ssleep(QL4_LOCK_DRVR_SLEEP);
990 if (drvr_wait) {
991 DEBUG2(printk("scsi%ld: %s: Waiting for "
992 "Global Init Semaphore(%d)...\n",
993 a->host_no,
994 __func__, drvr_wait));
995 }
996 drvr_wait -= QL4_LOCK_DRVR_SLEEP;
997 } else {
998 DEBUG2(printk("scsi%ld: %s: Global Init Semaphore "
999 "acquired\n", a->host_no, __func__));
1000 return QLA_SUCCESS;
1001 }
1002 }
1003 return QLA_ERROR;
1004 }
1005
1006 /**
1007 * qla4xxx_start_firmware - starts qla4xxx firmware
1008 * @ha: Pointer to host adapter structure.
1009 *
1010 * This routine performs the necessary steps to start the firmware for
1011 * the QLA4010 adapter.
1012 **/
1013 static int qla4xxx_start_firmware(struct scsi_qla_host *ha)
1014 {
1015 unsigned long flags = 0;
1016 uint32_t mbox_status;
1017 int status = QLA_ERROR;
1018 int soft_reset = 1;
1019 int config_chip = 0;
1020
1021 if (is_qla4022(ha) | is_qla4032(ha))
1022 ql4xxx_set_mac_number(ha);
1023
1024 if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
1025 return QLA_ERROR;
1026
1027 spin_lock_irqsave(&ha->hardware_lock, flags);
1028
1029 DEBUG2(printk("scsi%ld: %s: port_ctrl = 0x%08X\n", ha->host_no,
1030 __func__, readw(isp_port_ctrl(ha))));
1031 DEBUG(printk("scsi%ld: %s: port_status = 0x%08X\n", ha->host_no,
1032 __func__, readw(isp_port_status(ha))));
1033
1034 /* Is Hardware already initialized? */
1035 if ((readw(isp_port_ctrl(ha)) & 0x8000) != 0) {
1036 DEBUG(printk("scsi%ld: %s: Hardware has already been "
1037 "initialized\n", ha->host_no, __func__));
1038
1039 /* Receive firmware boot acknowledgement */
1040 mbox_status = readw(&ha->reg->mailbox[0]);
1041
1042 DEBUG2(printk("scsi%ld: %s: H/W Config complete - mbox[0]= "
1043 "0x%x\n", ha->host_no, __func__, mbox_status));
1044
1045 /* Is firmware already booted? */
1046 if (mbox_status == 0) {
1047 /* F/W not running, must be config by net driver */
1048 config_chip = 1;
1049 soft_reset = 0;
1050 } else {
1051 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
1052 &ha->reg->ctrl_status);
1053 readl(&ha->reg->ctrl_status);
1054 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1055 if (qla4xxx_get_firmware_state(ha) == QLA_SUCCESS) {
1056 DEBUG2(printk("scsi%ld: %s: Get firmware "
1057 "state -- state = 0x%x\n",
1058 ha->host_no,
1059 __func__, ha->firmware_state));
1060 /* F/W is running */
1061 if (ha->firmware_state &
1062 FW_STATE_CONFIG_WAIT) {
1063 DEBUG2(printk("scsi%ld: %s: Firmware "
1064 "in known state -- "
1065 "config and "
1066 "boot, state = 0x%x\n",
1067 ha->host_no, __func__,
1068 ha->firmware_state));
1069 config_chip = 1;
1070 soft_reset = 0;
1071 }
1072 } else {
1073 DEBUG2(printk("scsi%ld: %s: Firmware in "
1074 "unknown state -- resetting,"
1075 " state = "
1076 "0x%x\n", ha->host_no, __func__,
1077 ha->firmware_state));
1078 }
1079 spin_lock_irqsave(&ha->hardware_lock, flags);
1080 }
1081 } else {
1082 DEBUG(printk("scsi%ld: %s: H/W initialization hasn't been "
1083 "started - resetting\n", ha->host_no, __func__));
1084 }
1085 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1086
1087 DEBUG(printk("scsi%ld: %s: Flags soft_rest=%d, config= %d\n ",
1088 ha->host_no, __func__, soft_reset, config_chip));
1089 if (soft_reset) {
1090 DEBUG(printk("scsi%ld: %s: Issue Soft Reset\n", ha->host_no,
1091 __func__));
1092 status = qla4xxx_soft_reset(ha);
1093 if (status == QLA_ERROR) {
1094 DEBUG(printk("scsi%d: %s: Soft Reset failed!\n",
1095 ha->host_no, __func__));
1096 ql4xxx_unlock_drvr(ha);
1097 return QLA_ERROR;
1098 }
1099 config_chip = 1;
1100
1101 /* Reset clears the semaphore, so acquire again */
1102 if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
1103 return QLA_ERROR;
1104 }
1105
1106 if (config_chip) {
1107 if ((status = qla4xxx_config_nvram(ha)) == QLA_SUCCESS)
1108 status = qla4xxx_start_firmware_from_flash(ha);
1109 }
1110
1111 ql4xxx_unlock_drvr(ha);
1112 if (status == QLA_SUCCESS) {
1113 qla4xxx_get_fw_version(ha);
1114 if (test_and_clear_bit(AF_GET_CRASH_RECORD, &ha->flags))
1115 qla4xxx_get_crash_record(ha);
1116 } else {
1117 DEBUG(printk("scsi%ld: %s: Firmware has NOT started\n",
1118 ha->host_no, __func__));
1119 }
1120 return status;
1121 }
1122
1123
1124 /**
1125 * qla4xxx_initialize_adapter - initiailizes hba
1126 * @ha: Pointer to host adapter structure.
1127 * @renew_ddb_list: Indicates what to do with the adapter's ddb list
1128 * after adapter recovery has completed.
1129 * 0=preserve ddb list, 1=destroy and rebuild ddb list
1130 *
1131 * This routine parforms all of the steps necessary to initialize the adapter.
1132 *
1133 **/
1134 int qla4xxx_initialize_adapter(struct scsi_qla_host *ha,
1135 uint8_t renew_ddb_list)
1136 {
1137 int status = QLA_ERROR;
1138 int8_t ip_address[IP_ADDR_LEN] = {0} ;
1139
1140 ha->eeprom_cmd_data = 0;
1141
1142 qla4x00_pci_config(ha);
1143
1144 qla4xxx_disable_intrs(ha);
1145
1146 /* Initialize the Host adapter request/response queues and firmware */
1147 if (qla4xxx_start_firmware(ha) == QLA_ERROR)
1148 goto exit_init_hba;
1149
1150 if (qla4xxx_validate_mac_address(ha) == QLA_ERROR)
1151 goto exit_init_hba;
1152
1153 if (qla4xxx_init_local_data(ha) == QLA_ERROR)
1154 goto exit_init_hba;
1155
1156 status = qla4xxx_init_firmware(ha);
1157 if (status == QLA_ERROR)
1158 goto exit_init_hba;
1159
1160 /*
1161 * FW is waiting to get an IP address from DHCP server: Skip building
1162 * the ddb_list and wait for DHCP lease acquired aen to come in
1163 * followed by 0x8014 aen" to trigger the tgt discovery process.
1164 */
1165 if (ha->firmware_state & FW_STATE_DHCP_IN_PROGRESS)
1166 goto exit_init_online;
1167
1168 /* Skip device discovery if ip and subnet is zero */
1169 if (memcmp(ha->ip_address, ip_address, IP_ADDR_LEN) == 0 ||
1170 memcmp(ha->subnet_mask, ip_address, IP_ADDR_LEN) == 0)
1171 goto exit_init_online;
1172
1173 if (renew_ddb_list == PRESERVE_DDB_LIST) {
1174 /*
1175 * We want to preserve lun states (i.e. suspended, etc.)
1176 * for recovery initiated by the driver. So just update
1177 * the device states for the existing ddb_list.
1178 */
1179 qla4xxx_reinitialize_ddb_list(ha);
1180 } else if (renew_ddb_list == REBUILD_DDB_LIST) {
1181 /*
1182 * We want to build the ddb_list from scratch during
1183 * driver initialization and recovery initiated by the
1184 * INT_HBA_RESET IOCTL.
1185 */
1186 status = qla4xxx_initialize_ddb_list(ha);
1187 if (status == QLA_ERROR) {
1188 DEBUG2(printk("%s(%ld) Error occurred during build"
1189 "ddb list\n", __func__, ha->host_no));
1190 goto exit_init_hba;
1191 }
1192
1193 }
1194 if (!ha->tot_ddbs) {
1195 DEBUG2(printk("scsi%ld: Failed to initialize devices or none "
1196 "present in Firmware device database\n",
1197 ha->host_no));
1198 }
1199
1200 exit_init_online:
1201 set_bit(AF_ONLINE, &ha->flags);
1202 exit_init_hba:
1203 return status;
1204 }
1205
1206 /**
1207 * qla4xxx_add_device_dynamically - ddb addition due to an AEN
1208 * @ha: Pointer to host adapter structure.
1209 * @fw_ddb_index: Firmware's device database index
1210 *
1211 * This routine processes adds a device as a result of an 8014h AEN.
1212 **/
1213 static void qla4xxx_add_device_dynamically(struct scsi_qla_host *ha,
1214 uint32_t fw_ddb_index)
1215 {
1216 struct ddb_entry * ddb_entry;
1217 uint32_t new_tgt;
1218
1219 /* First allocate a device structure */
1220 ddb_entry = qla4xxx_get_ddb_entry(ha, fw_ddb_index, &new_tgt);
1221 if (ddb_entry == NULL) {
1222 DEBUG2(printk(KERN_WARNING
1223 "scsi%ld: Unable to allocate memory to add "
1224 "fw_ddb_index %d\n", ha->host_no, fw_ddb_index));
1225 return;
1226 }
1227
1228 if (!new_tgt && (ddb_entry->fw_ddb_index != fw_ddb_index)) {
1229 /* Target has been bound to a new fw_ddb_index */
1230 qla4xxx_free_ddb(ha, ddb_entry);
1231 ddb_entry = qla4xxx_alloc_ddb(ha, fw_ddb_index);
1232 if (ddb_entry == NULL) {
1233 DEBUG2(printk(KERN_WARNING
1234 "scsi%ld: Unable to allocate memory"
1235 " to add fw_ddb_index %d\n",
1236 ha->host_no, fw_ddb_index));
1237 return;
1238 }
1239 }
1240 if (qla4xxx_update_ddb_entry(ha, ddb_entry, fw_ddb_index) ==
1241 QLA_ERROR) {
1242 ha->fw_ddb_index_map[fw_ddb_index] =
1243 (struct ddb_entry *)INVALID_ENTRY;
1244 DEBUG2(printk(KERN_WARNING
1245 "scsi%ld: failed to add new device at index "
1246 "[%d]\n Unable to retrieve fw ddb entry\n",
1247 ha->host_no, fw_ddb_index));
1248 qla4xxx_free_ddb(ha, ddb_entry);
1249 return;
1250 }
1251
1252 if (qla4xxx_add_sess(ddb_entry)) {
1253 DEBUG2(printk(KERN_WARNING
1254 "scsi%ld: failed to add new device at index "
1255 "[%d]\n Unable to add connection and session\n",
1256 ha->host_no, fw_ddb_index));
1257 qla4xxx_free_ddb(ha, ddb_entry);
1258 }
1259 }
1260
1261 /**
1262 * qla4xxx_process_ddb_changed - process ddb state change
1263 * @ha - Pointer to host adapter structure.
1264 * @fw_ddb_index - Firmware's device database index
1265 * @state - Device state
1266 *
1267 * This routine processes a Decive Database Changed AEN Event.
1268 **/
1269 int qla4xxx_process_ddb_changed(struct scsi_qla_host *ha,
1270 uint32_t fw_ddb_index, uint32_t state)
1271 {
1272 struct ddb_entry * ddb_entry;
1273 uint32_t old_fw_ddb_device_state;
1274
1275 /* check for out of range index */
1276 if (fw_ddb_index >= MAX_DDB_ENTRIES)
1277 return QLA_ERROR;
1278
1279 /* Get the corresponging ddb entry */
1280 ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, fw_ddb_index);
1281 /* Device does not currently exist in our database. */
1282 if (ddb_entry == NULL) {
1283 if (state == DDB_DS_SESSION_ACTIVE)
1284 qla4xxx_add_device_dynamically(ha, fw_ddb_index);
1285 return QLA_SUCCESS;
1286 }
1287
1288 /* Device already exists in our database. */
1289 old_fw_ddb_device_state = ddb_entry->fw_ddb_device_state;
1290 DEBUG2(printk("scsi%ld: %s DDB - old state= 0x%x, new state=0x%x for "
1291 "index [%d]\n", ha->host_no, __func__,
1292 ddb_entry->fw_ddb_device_state, state, fw_ddb_index));
1293 if (old_fw_ddb_device_state == state &&
1294 state == DDB_DS_SESSION_ACTIVE) {
1295 /* Do nothing, state not changed. */
1296 return QLA_SUCCESS;
1297 }
1298
1299 ddb_entry->fw_ddb_device_state = state;
1300 /* Device is back online. */
1301 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) {
1302 atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
1303 atomic_set(&ddb_entry->port_down_timer,
1304 ha->port_down_retry_count);
1305 atomic_set(&ddb_entry->relogin_retry_count, 0);
1306 atomic_set(&ddb_entry->relogin_timer, 0);
1307 clear_bit(DF_RELOGIN, &ddb_entry->flags);
1308 clear_bit(DF_NO_RELOGIN, &ddb_entry->flags);
1309 iscsi_unblock_session(ddb_entry->sess);
1310 iscsi_session_event(ddb_entry->sess,
1311 ISCSI_KEVENT_CREATE_SESSION);
1312 /*
1313 * Change the lun state to READY in case the lun TIMEOUT before
1314 * the device came back.
1315 */
1316 } else {
1317 /* Device went away, try to relogin. */
1318 /* Mark device missing */
1319 if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
1320 qla4xxx_mark_device_missing(ha, ddb_entry);
1321 /*
1322 * Relogin if device state changed to a not active state.
1323 * However, do not relogin if this aen is a result of an IOCTL
1324 * logout (DF_NO_RELOGIN) or if this is a discovered device.
1325 */
1326 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_FAILED &&
1327 !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
1328 !test_bit(DF_NO_RELOGIN, &ddb_entry->flags) &&
1329 !test_bit(DF_ISNS_DISCOVERED, &ddb_entry->flags)) {
1330 /*
1331 * This triggers a relogin. After the relogin_timer
1332 * expires, the relogin gets scheduled. We must wait a
1333 * minimum amount of time since receiving an 0x8014 AEN
1334 * with failed device_state or a logout response before
1335 * we can issue another relogin.
1336 */
1337 /* Firmware padds this timeout: (time2wait +1).
1338 * Driver retry to login should be longer than F/W.
1339 * Otherwise F/W will fail
1340 * set_ddb() mbx cmd with 0x4005 since it still
1341 * counting down its time2wait.
1342 */
1343 atomic_set(&ddb_entry->relogin_timer, 0);
1344 atomic_set(&ddb_entry->retry_relogin_timer,
1345 ddb_entry->default_time2wait + 4);
1346 }
1347 }
1348
1349 return QLA_SUCCESS;
1350 }
1351