1e29f51d596b71d27d14226a153c0853e2eae9b8
[linux-2.6.git] / drivers / scsi / qla4xxx / ql4_init.c
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 "ql4_def.h"
9 #include "ql4_glbl.h"
10 #include "ql4_dbg.h"
11 #include "ql4_inline.h"
12
13 static struct ddb_entry * qla4xxx_alloc_ddb(struct scsi_qla_host *ha,
14                                             uint32_t fw_ddb_index);
15
16 static void ql4xxx_set_mac_number(struct scsi_qla_host *ha)
17 {
18         uint32_t value;
19         uint8_t func_number;
20         unsigned long flags;
21
22         /* Get the function number */
23         spin_lock_irqsave(&ha->hardware_lock, flags);
24         value = readw(&ha->reg->ctrl_status);
25         spin_unlock_irqrestore(&ha->hardware_lock, flags);
26
27         func_number = (uint8_t) ((value >> 4) & 0x30);
28         switch (value & ISP_CONTROL_FN_MASK) {
29         case ISP_CONTROL_FN0_SCSI:
30                 ha->mac_index = 1;
31                 break;
32         case ISP_CONTROL_FN1_SCSI:
33                 ha->mac_index = 3;
34                 break;
35         default:
36                 DEBUG2(printk("scsi%ld: %s: Invalid function number, "
37                               "ispControlStatus = 0x%x\n", ha->host_no,
38                               __func__, value));
39                 break;
40         }
41         DEBUG2(printk("scsi%ld: %s: mac_index %d.\n", ha->host_no, __func__,
42                       ha->mac_index));
43 }
44
45 /**
46  * qla4xxx_free_ddb - deallocate ddb
47  * @ha: pointer to host adapter structure.
48  * @ddb_entry: pointer to device database entry
49  *
50  * This routine deallocates and unlinks the specified ddb_entry from the
51  * adapter's
52  **/
53 static void qla4xxx_free_ddb(struct scsi_qla_host *ha,
54                              struct ddb_entry *ddb_entry)
55 {
56         /* Remove device entry from list */
57         list_del_init(&ddb_entry->list);
58
59         /* Remove device pointer from index mapping arrays */
60         ha->fw_ddb_index_map[ddb_entry->fw_ddb_index] =
61                 (struct ddb_entry *) INVALID_ENTRY;
62         ha->tot_ddbs--;
63
64         /* Free memory and scsi-ml struct for device entry */
65         qla4xxx_destroy_sess(ddb_entry);
66 }
67
68 /**
69  * qla4xxx_free_ddb_list - deallocate all ddbs
70  * @ha: pointer to host adapter structure.
71  *
72  * This routine deallocates and removes all devices on the sppecified adapter.
73  **/
74 void qla4xxx_free_ddb_list(struct scsi_qla_host *ha)
75 {
76         struct list_head *ptr;
77         struct ddb_entry *ddb_entry;
78
79         while (!list_empty(&ha->ddb_list)) {
80                 ptr = ha->ddb_list.next;
81                 /* Free memory for device entry and remove */
82                 ddb_entry = list_entry(ptr, struct ddb_entry, list);
83                 qla4xxx_free_ddb(ha, ddb_entry);
84         }
85 }
86
87 /**
88  * qla4xxx_init_rings - initialize hw queues
89  * @ha: pointer to host adapter structure.
90  *
91  * This routine initializes the internal queues for the specified adapter.
92  * The QLA4010 requires us to restart the queues at index 0.
93  * The QLA4000 doesn't care, so just default to QLA4010's requirement.
94  **/
95 int qla4xxx_init_rings(struct scsi_qla_host *ha)
96 {
97         unsigned long flags = 0;
98
99         /* Initialize request queue. */
100         spin_lock_irqsave(&ha->hardware_lock, flags);
101         ha->request_out = 0;
102         ha->request_in = 0;
103         ha->request_ptr = &ha->request_ring[ha->request_in];
104         ha->req_q_count = REQUEST_QUEUE_DEPTH;
105
106         /* Initialize response queue. */
107         ha->response_in = 0;
108         ha->response_out = 0;
109         ha->response_ptr = &ha->response_ring[ha->response_out];
110
111         /*
112          * Initialize DMA Shadow registers.  The firmware is really supposed to
113          * take care of this, but on some uniprocessor systems, the shadow
114          * registers aren't cleared-- causing the interrupt_handler to think
115          * there are responses to be processed when there aren't.
116          */
117         ha->shadow_regs->req_q_out = __constant_cpu_to_le32(0);
118         ha->shadow_regs->rsp_q_in = __constant_cpu_to_le32(0);
119         wmb();
120
121         writel(0, &ha->reg->req_q_in);
122         writel(0, &ha->reg->rsp_q_out);
123         readl(&ha->reg->rsp_q_out);
124
125         spin_unlock_irqrestore(&ha->hardware_lock, flags);
126
127         return QLA_SUCCESS;
128 }
129
130 /**
131  * qla4xxx_validate_mac_address - validate adapter MAC address(es)
132  * @ha: pointer to host adapter structure.
133  *
134  **/
135 static int qla4xxx_validate_mac_address(struct scsi_qla_host *ha)
136 {
137         struct flash_sys_info *sys_info;
138         dma_addr_t sys_info_dma;
139         int status = QLA_ERROR;
140
141         sys_info = dma_alloc_coherent(&ha->pdev->dev, sizeof(*sys_info),
142                                       &sys_info_dma, GFP_KERNEL);
143         if (sys_info == NULL) {
144                 DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
145                               ha->host_no, __func__));
146
147                 goto exit_validate_mac_no_free;
148         }
149         memset(sys_info, 0, sizeof(*sys_info));
150
151         /* Get flash sys info */
152         if (qla4xxx_get_flash(ha, sys_info_dma, FLASH_OFFSET_SYS_INFO,
153                               sizeof(*sys_info)) != QLA_SUCCESS) {
154                 DEBUG2(printk("scsi%ld: %s: get_flash FLASH_OFFSET_SYS_INFO "
155                               "failed\n", ha->host_no, __func__));
156
157                 goto exit_validate_mac;
158         }
159
160         /* Save M.A.C. address & serial_number */
161         memcpy(ha->my_mac, &sys_info->physAddr[0].address[0],
162                min(sizeof(ha->my_mac),
163                    sizeof(sys_info->physAddr[0].address)));
164         memcpy(ha->serial_number, &sys_info->acSerialNumber,
165                min(sizeof(ha->serial_number),
166                    sizeof(sys_info->acSerialNumber)));
167
168         status = QLA_SUCCESS;
169
170  exit_validate_mac:
171         dma_free_coherent(&ha->pdev->dev, sizeof(*sys_info), sys_info,
172                           sys_info_dma);
173
174  exit_validate_mac_no_free:
175         return status;
176 }
177
178 /**
179  * qla4xxx_init_local_data - initialize adapter specific local data
180  * @ha: pointer to host adapter structure.
181  *
182  **/
183 static int qla4xxx_init_local_data(struct scsi_qla_host *ha)
184 {
185         /* Initilize aen queue */
186         ha->aen_q_count = MAX_AEN_ENTRIES;
187
188         return qla4xxx_get_firmware_status(ha);
189 }
190
191 static int qla4xxx_fw_ready(struct scsi_qla_host *ha)
192 {
193         uint32_t timeout_count;
194         int ready = 0;
195
196         DEBUG2(dev_info(&ha->pdev->dev, "Waiting for Firmware Ready..\n"));
197         for (timeout_count = ADAPTER_INIT_TOV; timeout_count > 0;
198              timeout_count--) {
199                 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
200                         qla4xxx_get_dhcp_ip_address(ha);
201
202                 /* Get firmware state. */
203                 if (qla4xxx_get_firmware_state(ha) != QLA_SUCCESS) {
204                         DEBUG2(printk("scsi%ld: %s: unable to get firmware "
205                                       "state\n", ha->host_no, __func__));
206                         break;
207
208                 }
209
210                 if (ha->firmware_state & FW_STATE_ERROR) {
211                         DEBUG2(printk("scsi%ld: %s: an unrecoverable error has"
212                                       " occurred\n", ha->host_no, __func__));
213                         break;
214
215                 }
216                 if (ha->firmware_state & FW_STATE_CONFIG_WAIT) {
217                         /*
218                          * The firmware has not yet been issued an Initialize
219                          * Firmware command, so issue it now.
220                          */
221                         if (qla4xxx_initialize_fw_cb(ha) == QLA_ERROR)
222                                 break;
223
224                         /* Go back and test for ready state - no wait. */
225                         continue;
226                 }
227
228                 if (ha->firmware_state == FW_STATE_READY) {
229                         DEBUG2(dev_info(&ha->pdev->dev, "Firmware Ready..\n"));
230                         /* The firmware is ready to process SCSI commands. */
231                         DEBUG2(dev_info(&ha->pdev->dev,
232                                           "scsi%ld: %s: MEDIA TYPE - %s\n",
233                                           ha->host_no,
234                                           __func__, (ha->addl_fw_state &
235                                                      FW_ADDSTATE_OPTICAL_MEDIA)
236                                           != 0 ? "OPTICAL" : "COPPER"));
237                         DEBUG2(dev_info(&ha->pdev->dev,
238                                           "scsi%ld: %s: DHCP STATE Enabled "
239                                           "%s\n",
240                                           ha->host_no, __func__,
241                                           (ha->addl_fw_state &
242                                            FW_ADDSTATE_DHCP_ENABLED) != 0 ?
243                                           "YES" : "NO"));
244                         DEBUG2(dev_info(&ha->pdev->dev,
245                                           "scsi%ld: %s: LINK %s\n",
246                                           ha->host_no, __func__,
247                                           (ha->addl_fw_state &
248                                            FW_ADDSTATE_LINK_UP) != 0 ?
249                                           "UP" : "DOWN"));
250                         DEBUG2(dev_info(&ha->pdev->dev,
251                                           "scsi%ld: %s: iSNS Service "
252                                           "Started %s\n",
253                                           ha->host_no, __func__,
254                                           (ha->addl_fw_state &
255                                            FW_ADDSTATE_ISNS_SVC_ENABLED) != 0 ?
256                                           "YES" : "NO"));
257
258                         ready = 1;
259                         break;
260                 }
261                 DEBUG2(printk("scsi%ld: %s: waiting on fw, state=%x:%x - "
262                               "seconds expired= %d\n", ha->host_no, __func__,
263                               ha->firmware_state, ha->addl_fw_state,
264                               timeout_count));
265                 if (is_qla4032(ha) &&
266                         !(ha->addl_fw_state & FW_ADDSTATE_LINK_UP) &&
267                         (timeout_count < ADAPTER_INIT_TOV - 5)) {
268                         break;
269                 }
270
271                 msleep(1000);
272         }                       /* end of for */
273
274         if (timeout_count == 0)
275                 DEBUG2(printk("scsi%ld: %s: FW Initialization timed out!\n",
276                               ha->host_no, __func__));
277
278         if (ha->firmware_state & FW_STATE_DHCP_IN_PROGRESS)  {
279                 DEBUG2(printk("scsi%ld: %s: FW is reporting its waiting to"
280                               " grab an IP address from DHCP server\n",
281                               ha->host_no, __func__));
282                 ready = 1;
283         }
284
285         return ready;
286 }
287
288 /**
289  * qla4xxx_init_firmware - initializes the firmware.
290  * @ha: pointer to host adapter structure.
291  *
292  **/
293 static int qla4xxx_init_firmware(struct scsi_qla_host *ha)
294 {
295         int status = QLA_ERROR;
296
297         dev_info(&ha->pdev->dev, "Initializing firmware..\n");
298         if (qla4xxx_initialize_fw_cb(ha) == QLA_ERROR) {
299                 DEBUG2(printk("scsi%ld: %s: Failed to initialize firmware "
300                               "control block\n", ha->host_no, __func__));
301                 return status;
302         }
303         if (!qla4xxx_fw_ready(ha))
304                 return status;
305
306         return qla4xxx_get_firmware_status(ha);
307 }
308
309 static struct ddb_entry* qla4xxx_get_ddb_entry(struct scsi_qla_host *ha,
310                                                 uint32_t fw_ddb_index,
311                                                 uint32_t *new_tgt)
312 {
313         struct dev_db_entry *fw_ddb_entry = NULL;
314         dma_addr_t fw_ddb_entry_dma;
315         struct ddb_entry *ddb_entry = NULL;
316         int found = 0;
317         uint32_t device_state;
318
319         *new_tgt = 0;
320         /* Make sure the dma buffer is valid */
321         fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev,
322                                           sizeof(*fw_ddb_entry),
323                                           &fw_ddb_entry_dma, GFP_KERNEL);
324         if (fw_ddb_entry == NULL) {
325                 DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
326                               ha->host_no, __func__));
327                 return NULL;
328         }
329
330         if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index, fw_ddb_entry,
331                                     fw_ddb_entry_dma, NULL, NULL,
332                                     &device_state, NULL, NULL, NULL) ==
333             QLA_ERROR) {
334                 DEBUG2(printk("scsi%ld: %s: failed get_ddb_entry for "
335                               "fw_ddb_index %d\n", ha->host_no, __func__,
336                               fw_ddb_index));
337                 return NULL;
338         }
339
340         /* Allocate DDB if not already allocated. */
341         DEBUG2(printk("scsi%ld: %s: Looking for ddb[%d]\n", ha->host_no,
342                       __func__, fw_ddb_index));
343         list_for_each_entry(ddb_entry, &ha->ddb_list, list) {
344                 if (memcmp(ddb_entry->iscsi_name, fw_ddb_entry->iscsi_name,
345                            ISCSI_NAME_SIZE) == 0) {
346                         found++;
347                         break;
348                 }
349         }
350
351         if (!found) {
352                 DEBUG2(printk("scsi%ld: %s: ddb[%d] not found - allocating "
353                               "new ddb\n", ha->host_no, __func__,
354                               fw_ddb_index));
355                 *new_tgt = 1;
356                 ddb_entry = qla4xxx_alloc_ddb(ha, fw_ddb_index);
357         }
358
359         /* if not found allocate new ddb */
360         dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry), fw_ddb_entry,
361                           fw_ddb_entry_dma);
362
363         return ddb_entry;
364 }
365
366 /**
367  * qla4xxx_update_ddb_entry - update driver's internal ddb
368  * @ha: pointer to host adapter structure.
369  * @ddb_entry: pointer to device database structure to be filled
370  * @fw_ddb_index: index of the ddb entry in fw ddb table
371  *
372  * This routine updates the driver's internal device database entry
373  * with information retrieved from the firmware's device database
374  * entry for the specified device. The ddb_entry->fw_ddb_index field
375  * must be initialized prior to calling this routine
376  *
377  **/
378 static int qla4xxx_update_ddb_entry(struct scsi_qla_host *ha,
379                                     struct ddb_entry *ddb_entry,
380                                     uint32_t fw_ddb_index)
381 {
382         struct dev_db_entry *fw_ddb_entry = NULL;
383         dma_addr_t fw_ddb_entry_dma;
384         int status = QLA_ERROR;
385
386         if (ddb_entry == NULL) {
387                 DEBUG2(printk("scsi%ld: %s: ddb_entry is NULL\n", ha->host_no,
388                               __func__));
389                 goto exit_update_ddb;
390         }
391
392         /* Make sure the dma buffer is valid */
393         fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev,
394                                           sizeof(*fw_ddb_entry),
395                                           &fw_ddb_entry_dma, GFP_KERNEL);
396         if (fw_ddb_entry == NULL) {
397                 DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
398                               ha->host_no, __func__));
399
400                 goto exit_update_ddb;
401         }
402
403         if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index, fw_ddb_entry,
404                                     fw_ddb_entry_dma, NULL, NULL,
405                                     &ddb_entry->fw_ddb_device_state, NULL,
406                                     &ddb_entry->tcp_source_port_num,
407                                     &ddb_entry->connection_id) ==
408             QLA_ERROR) {
409                 DEBUG2(printk("scsi%ld: %s: failed get_ddb_entry for "
410                               "fw_ddb_index %d\n", ha->host_no, __func__,
411                               fw_ddb_index));
412
413                 goto exit_update_ddb;
414         }
415
416         status = QLA_SUCCESS;
417         ddb_entry->target_session_id = le16_to_cpu(fw_ddb_entry->tsid);
418         ddb_entry->task_mgmt_timeout =
419                 le16_to_cpu(fw_ddb_entry->def_timeout);
420         ddb_entry->CmdSn = 0;
421         ddb_entry->exe_throttle = le16_to_cpu(fw_ddb_entry->exec_throttle);
422         ddb_entry->default_relogin_timeout =
423                 le16_to_cpu(fw_ddb_entry->def_timeout);
424         ddb_entry->default_time2wait = le16_to_cpu(fw_ddb_entry->iscsi_def_time2wait);
425
426         /* Update index in case it changed */
427         ddb_entry->fw_ddb_index = fw_ddb_index;
428         ha->fw_ddb_index_map[fw_ddb_index] = ddb_entry;
429
430         ddb_entry->port = le16_to_cpu(fw_ddb_entry->port);
431         ddb_entry->tpgt = le32_to_cpu(fw_ddb_entry->tgt_portal_grp);
432         memcpy(&ddb_entry->iscsi_name[0], &fw_ddb_entry->iscsi_name[0],
433                min(sizeof(ddb_entry->iscsi_name),
434                    sizeof(fw_ddb_entry->iscsi_name)));
435         memcpy(&ddb_entry->ip_addr[0], &fw_ddb_entry->ip_addr[0],
436                min(sizeof(ddb_entry->ip_addr), sizeof(fw_ddb_entry->ip_addr)));
437
438         DEBUG2(printk("scsi%ld: %s: ddb[%d] - State= %x status= %d.\n",
439                       ha->host_no, __func__, fw_ddb_index,
440                       ddb_entry->fw_ddb_device_state, status));
441
442  exit_update_ddb:
443         if (fw_ddb_entry)
444                 dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
445                                   fw_ddb_entry, fw_ddb_entry_dma);
446
447         return status;
448 }
449
450 /**
451  * qla4xxx_alloc_ddb - allocate device database entry
452  * @ha: Pointer to host adapter structure.
453  * @fw_ddb_index: Firmware's device database index
454  *
455  * This routine allocates a ddb_entry, ititializes some values, and
456  * inserts it into the ddb list.
457  **/
458 static struct ddb_entry * qla4xxx_alloc_ddb(struct scsi_qla_host *ha,
459                                             uint32_t fw_ddb_index)
460 {
461         struct ddb_entry *ddb_entry;
462
463         DEBUG2(printk("scsi%ld: %s: fw_ddb_index [%d]\n", ha->host_no,
464                       __func__, fw_ddb_index));
465
466         ddb_entry = qla4xxx_alloc_sess(ha);
467         if (ddb_entry == NULL) {
468                 DEBUG2(printk("scsi%ld: %s: Unable to allocate memory "
469                               "to add fw_ddb_index [%d]\n",
470                               ha->host_no, __func__, fw_ddb_index));
471                 return ddb_entry;
472         }
473
474         ddb_entry->fw_ddb_index = fw_ddb_index;
475         atomic_set(&ddb_entry->port_down_timer, ha->port_down_retry_count);
476         atomic_set(&ddb_entry->retry_relogin_timer, INVALID_ENTRY);
477         atomic_set(&ddb_entry->relogin_timer, 0);
478         atomic_set(&ddb_entry->relogin_retry_count, 0);
479         atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
480         list_add_tail(&ddb_entry->list, &ha->ddb_list);
481         ha->fw_ddb_index_map[fw_ddb_index] = ddb_entry;
482         ha->tot_ddbs++;
483
484         return ddb_entry;
485 }
486
487 /**
488  * qla4xxx_configure_ddbs - builds driver ddb list
489  * @ha: Pointer to host adapter structure.
490  *
491  * This routine searches for all valid firmware ddb entries and builds
492  * an internal ddb list. Ddbs that are considered valid are those with
493  * a device state of SESSION_ACTIVE.
494  **/
495 static int qla4xxx_build_ddb_list(struct scsi_qla_host *ha)
496 {
497         int status = QLA_SUCCESS;
498         uint32_t fw_ddb_index = 0;
499         uint32_t next_fw_ddb_index = 0;
500         uint32_t ddb_state;
501         uint32_t conn_err, err_code;
502         struct ddb_entry *ddb_entry;
503         uint32_t new_tgt;
504
505         dev_info(&ha->pdev->dev, "Initializing DDBs ...\n");
506         for (fw_ddb_index = 0; fw_ddb_index < MAX_DDB_ENTRIES;
507              fw_ddb_index = next_fw_ddb_index) {
508                 /* First, let's see if a device exists here */
509                 if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index, NULL, 0, NULL,
510                                             &next_fw_ddb_index, &ddb_state,
511                                             &conn_err, NULL, NULL) ==
512                     QLA_ERROR) {
513                         DEBUG2(printk("scsi%ld: %s: get_ddb_entry, "
514                                       "fw_ddb_index %d failed", ha->host_no,
515                                       __func__, fw_ddb_index));
516                         return QLA_ERROR;
517                 }
518
519                 DEBUG2(printk("scsi%ld: %s: Getting DDB[%d] ddbstate=0x%x, "
520                               "next_fw_ddb_index=%d.\n", ha->host_no, __func__,
521                               fw_ddb_index, ddb_state, next_fw_ddb_index));
522
523                 /* Issue relogin, if necessary. */
524                 if (ddb_state == DDB_DS_SESSION_FAILED ||
525                     ddb_state == DDB_DS_NO_CONNECTION_ACTIVE) {
526                         /* Try and login to device */
527                         DEBUG2(printk("scsi%ld: %s: Login to DDB[%d]\n",
528                                       ha->host_no, __func__, fw_ddb_index));
529                         err_code = ((conn_err & 0x00ff0000) >> 16);
530                         if (err_code == 0x1c || err_code == 0x06) {
531                                 DEBUG2(printk("scsi%ld: %s send target "
532                                               "completed "
533                                               "or access denied failure\n",
534                                               ha->host_no, __func__));
535                         } else {
536                                 qla4xxx_set_ddb_entry(ha, fw_ddb_index, 0);
537                                 if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index,
538                                         NULL, 0, NULL, &next_fw_ddb_index,
539                                         &ddb_state, &conn_err, NULL, NULL)
540                                         == QLA_ERROR) {
541                                         DEBUG2(printk("scsi%ld: %s:"
542                                                 "get_ddb_entry %d failed\n",
543                                                 ha->host_no,
544                                                 __func__, fw_ddb_index));
545                                         return QLA_ERROR;
546                                 }
547                         }
548                 }
549
550                 if (ddb_state != DDB_DS_SESSION_ACTIVE)
551                         goto next_one;
552                 /*
553                  * if fw_ddb with session active state found,
554                  * add to ddb_list
555                  */
556                 DEBUG2(printk("scsi%ld: %s: DDB[%d] added to list\n",
557                               ha->host_no, __func__, fw_ddb_index));
558
559                 /* Add DDB to internal our ddb list. */
560                 ddb_entry = qla4xxx_get_ddb_entry(ha, fw_ddb_index, &new_tgt);
561                 if (ddb_entry == NULL) {
562                         DEBUG2(printk("scsi%ld: %s: Unable to allocate memory "
563                                       "for device at fw_ddb_index %d\n",
564                                       ha->host_no, __func__, fw_ddb_index));
565                         return QLA_ERROR;
566                 }
567                 /* Fill in the device structure */
568                 if (qla4xxx_update_ddb_entry(ha, ddb_entry, fw_ddb_index) ==
569                     QLA_ERROR) {
570                         ha->fw_ddb_index_map[fw_ddb_index] =
571                                 (struct ddb_entry *)INVALID_ENTRY;
572
573
574                         DEBUG2(printk("scsi%ld: %s: update_ddb_entry failed "
575                                       "for fw_ddb_index %d.\n",
576                                       ha->host_no, __func__, fw_ddb_index));
577                         return QLA_ERROR;
578                 }
579
580 next_one:
581                 /* We know we've reached the last device when
582                  * next_fw_ddb_index is 0 */
583                 if (next_fw_ddb_index == 0)
584                         break;
585         }
586
587         dev_info(&ha->pdev->dev, "DDB list done..\n");
588
589         return status;
590 }
591
592 struct qla4_relog_scan {
593         int halt_wait;
594         uint32_t conn_err;
595         uint32_t err_code;
596         uint32_t fw_ddb_index;
597         uint32_t next_fw_ddb_index;
598         uint32_t fw_ddb_device_state;
599 };
600
601 static int qla4_test_rdy(struct scsi_qla_host *ha, struct qla4_relog_scan *rs)
602 {
603         struct ddb_entry *ddb_entry;
604
605         /*
606          * Don't want to do a relogin if connection
607          * error is 0x1c.
608          */
609         rs->err_code = ((rs->conn_err & 0x00ff0000) >> 16);
610         if (rs->err_code == 0x1c || rs->err_code == 0x06) {
611                 DEBUG2(printk(
612                                "scsi%ld: %s send target"
613                                " completed or "
614                                "access denied failure\n",
615                                ha->host_no, __func__));
616         } else {
617                 /* We either have a device that is in
618                  * the process of relogging in or a
619                  * device that is waiting to be
620                  * relogged in */
621                 rs->halt_wait = 0;
622
623                 ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha,
624                                                            rs->fw_ddb_index);
625                 if (ddb_entry == NULL)
626                         return QLA_ERROR;
627
628                 if (ddb_entry->dev_scan_wait_to_start_relogin != 0
629                     && time_after_eq(jiffies,
630                                      ddb_entry->
631                                      dev_scan_wait_to_start_relogin))
632                 {
633                         ddb_entry->dev_scan_wait_to_start_relogin = 0;
634                         qla4xxx_set_ddb_entry(ha, rs->fw_ddb_index, 0);
635                 }
636         }
637         return QLA_SUCCESS;
638 }
639
640 static int qla4_scan_for_relogin(struct scsi_qla_host *ha,
641                                  struct qla4_relog_scan *rs)
642 {
643         int error;
644
645         /* scan for relogins
646          * ----------------- */
647         for (rs->fw_ddb_index = 0; rs->fw_ddb_index < MAX_DDB_ENTRIES;
648              rs->fw_ddb_index = rs->next_fw_ddb_index) {
649                 if (qla4xxx_get_fwddb_entry(ha, rs->fw_ddb_index, NULL, 0,
650                                             NULL, &rs->next_fw_ddb_index,
651                                             &rs->fw_ddb_device_state,
652                                             &rs->conn_err, NULL, NULL)
653                     == QLA_ERROR)
654                         return QLA_ERROR;
655
656                 if (rs->fw_ddb_device_state == DDB_DS_LOGIN_IN_PROCESS)
657                         rs->halt_wait = 0;
658
659                 if (rs->fw_ddb_device_state == DDB_DS_SESSION_FAILED ||
660                     rs->fw_ddb_device_state == DDB_DS_NO_CONNECTION_ACTIVE) {
661                         error = qla4_test_rdy(ha, rs);
662                         if (error)
663                                 return error;
664                 }
665
666                 /* We know we've reached the last device when
667                  * next_fw_ddb_index is 0 */
668                 if (rs->next_fw_ddb_index == 0)
669                         break;
670         }
671         return QLA_SUCCESS;
672 }
673
674 /**
675  * qla4xxx_devices_ready - wait for target devices to be logged in
676  * @ha: pointer to adapter structure
677  *
678  * This routine waits up to ql4xdiscoverywait seconds
679  * F/W database during driver load time.
680  **/
681 static int qla4xxx_devices_ready(struct scsi_qla_host *ha)
682 {
683         int error;
684         unsigned long discovery_wtime;
685         struct qla4_relog_scan rs;
686
687         discovery_wtime = jiffies + (ql4xdiscoverywait * HZ);
688
689         DEBUG(printk("Waiting (%d) for devices ...\n", ql4xdiscoverywait));
690         do {
691                 /* poll for AEN. */
692                 qla4xxx_get_firmware_state(ha);
693                 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags)) {
694                         /* Set time-between-relogin timer */
695                         qla4xxx_process_aen(ha, RELOGIN_DDB_CHANGED_AENS);
696                 }
697
698                 /* if no relogins active or needed, halt discvery wait */
699                 rs.halt_wait = 1;
700
701                 error = qla4_scan_for_relogin(ha, &rs);
702
703                 if (rs.halt_wait) {
704                         DEBUG2(printk("scsi%ld: %s: Delay halted.  Devices "
705                                       "Ready.\n", ha->host_no, __func__));
706                         return QLA_SUCCESS;
707                 }
708
709                 msleep(2000);
710         } while (!time_after_eq(jiffies, discovery_wtime));
711
712         DEBUG3(qla4xxx_get_conn_event_log(ha));
713
714         return QLA_SUCCESS;
715 }
716
717 static void qla4xxx_flush_AENS(struct scsi_qla_host *ha)
718 {
719         unsigned long wtime;
720
721         /* Flush the 0x8014 AEN from the firmware as a result of
722          * Auto connect. We are basically doing get_firmware_ddb()
723          * to determine whether we need to log back in or not.
724          *  Trying to do a set ddb before we have processed 0x8014
725          *  will result in another set_ddb() for the same ddb. In other
726          *  words there will be stale entries in the aen_q.
727          */
728         wtime = jiffies + (2 * HZ);
729         do {
730                 if (qla4xxx_get_firmware_state(ha) == QLA_SUCCESS)
731                         if (ha->firmware_state & (BIT_2 | BIT_0))
732                                 return;
733
734                 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
735                         qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
736
737                 msleep(1000);
738         } while (!time_after_eq(jiffies, wtime));
739
740 }
741
742 static int qla4xxx_initialize_ddb_list(struct scsi_qla_host *ha)
743 {
744         uint16_t fw_ddb_index;
745         int status = QLA_SUCCESS;
746
747         /* free the ddb list if is not empty */
748         if (!list_empty(&ha->ddb_list))
749                 qla4xxx_free_ddb_list(ha);
750
751         for (fw_ddb_index = 0; fw_ddb_index < MAX_DDB_ENTRIES; fw_ddb_index++)
752                 ha->fw_ddb_index_map[fw_ddb_index] =
753                         (struct ddb_entry *)INVALID_ENTRY;
754
755         ha->tot_ddbs = 0;
756
757         qla4xxx_flush_AENS(ha);
758
759         /*
760          * First perform device discovery for active
761          * fw ddb indexes and build
762          * ddb list.
763          */
764         if ((status = qla4xxx_build_ddb_list(ha)) == QLA_ERROR)
765                 return status;
766
767         /* Wait for an AEN */
768         qla4xxx_devices_ready(ha);
769
770         /*
771          * Targets can come online after the inital discovery, so processing
772          * the aens here will catch them.
773          */
774         if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
775                 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
776
777         return status;
778 }
779
780 /**
781  * qla4xxx_update_ddb_list - update the driver ddb list
782  * @ha: pointer to host adapter structure.
783  *
784  * This routine obtains device information from the F/W database after
785  * firmware or adapter resets.  The device table is preserved.
786  **/
787 int qla4xxx_reinitialize_ddb_list(struct scsi_qla_host *ha)
788 {
789         int status = QLA_SUCCESS;
790         struct ddb_entry *ddb_entry, *detemp;
791
792         /* Update the device information for all devices. */
793         list_for_each_entry_safe(ddb_entry, detemp, &ha->ddb_list, list) {
794                 qla4xxx_update_ddb_entry(ha, ddb_entry,
795                                          ddb_entry->fw_ddb_index);
796                 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) {
797                         atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
798                         DEBUG2(printk ("scsi%ld: %s: ddb index [%d] marked "
799                                        "ONLINE\n", ha->host_no, __func__,
800                                        ddb_entry->fw_ddb_index));
801                 } else if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
802                         qla4xxx_mark_device_missing(ha, ddb_entry);
803         }
804         return status;
805 }
806
807 /**
808  * qla4xxx_relogin_device - re-establish session
809  * @ha: Pointer to host adapter structure.
810  * @ddb_entry: Pointer to device database entry
811  *
812  * This routine does a session relogin with the specified device.
813  * The ddb entry must be assigned prior to making this call.
814  **/
815 int qla4xxx_relogin_device(struct scsi_qla_host *ha,
816                            struct ddb_entry * ddb_entry)
817 {
818         uint16_t relogin_timer;
819
820         relogin_timer = max(ddb_entry->default_relogin_timeout,
821                             (uint16_t)RELOGIN_TOV);
822         atomic_set(&ddb_entry->relogin_timer, relogin_timer);
823
824         DEBUG2(printk("scsi%ld: Relogin index [%d]. TOV=%d\n", ha->host_no,
825                       ddb_entry->fw_ddb_index, relogin_timer));
826
827         qla4xxx_set_ddb_entry(ha, ddb_entry->fw_ddb_index, 0);
828
829         return QLA_SUCCESS;
830 }
831
832 static int qla4xxx_config_nvram(struct scsi_qla_host *ha)
833 {
834         unsigned long flags;
835         union external_hw_config_reg extHwConfig;
836
837         DEBUG2(printk("scsi%ld: %s: Get EEProm parameters \n", ha->host_no,
838                       __func__));
839         if (ql4xxx_lock_flash(ha) != QLA_SUCCESS)
840                 return (QLA_ERROR);
841         if (ql4xxx_lock_nvram(ha) != QLA_SUCCESS) {
842                 ql4xxx_unlock_flash(ha);
843                 return (QLA_ERROR);
844         }
845
846         /* Get EEPRom Parameters from NVRAM and validate */
847         dev_info(&ha->pdev->dev, "Configuring NVRAM ...\n");
848         if (qla4xxx_is_nvram_configuration_valid(ha) == QLA_SUCCESS) {
849                 spin_lock_irqsave(&ha->hardware_lock, flags);
850                 extHwConfig.Asuint32_t =
851                         rd_nvram_word(ha, eeprom_ext_hw_conf_offset(ha));
852                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
853         } else {
854                 /*
855                  * QLogic adapters should always have a valid NVRAM.
856                  * If not valid, do not load.
857                  */
858                 dev_warn(&ha->pdev->dev,
859                            "scsi%ld: %s: EEProm checksum invalid.  "
860                            "Please update your EEPROM\n", ha->host_no,
861                            __func__);
862
863                 /* set defaults */
864                 if (is_qla4010(ha))
865                         extHwConfig.Asuint32_t = 0x1912;
866                 else if (is_qla4022(ha) | is_qla4032(ha))
867                         extHwConfig.Asuint32_t = 0x0023;
868         }
869         DEBUG(printk("scsi%ld: %s: Setting extHwConfig to 0xFFFF%04x\n",
870                      ha->host_no, __func__, extHwConfig.Asuint32_t));
871
872         spin_lock_irqsave(&ha->hardware_lock, flags);
873         writel((0xFFFF << 16) | extHwConfig.Asuint32_t, isp_ext_hw_conf(ha));
874         readl(isp_ext_hw_conf(ha));
875         spin_unlock_irqrestore(&ha->hardware_lock, flags);
876
877         ql4xxx_unlock_nvram(ha);
878         ql4xxx_unlock_flash(ha);
879
880         return (QLA_SUCCESS);
881 }
882
883 static void qla4x00_pci_config(struct scsi_qla_host *ha)
884 {
885         uint16_t w;
886         int status;
887
888         dev_info(&ha->pdev->dev, "Configuring PCI space...\n");
889
890         pci_set_master(ha->pdev);
891         status = pci_set_mwi(ha->pdev);
892         /*
893          * We want to respect framework's setting of PCI configuration space
894          * command register and also want to make sure that all bits of
895          * interest to us are properly set in command register.
896          */
897         pci_read_config_word(ha->pdev, PCI_COMMAND, &w);
898         w |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
899         w &= ~PCI_COMMAND_INTX_DISABLE;
900         pci_write_config_word(ha->pdev, PCI_COMMAND, w);
901 }
902
903 static int qla4xxx_start_firmware_from_flash(struct scsi_qla_host *ha)
904 {
905         int status = QLA_ERROR;
906         uint32_t max_wait_time;
907         unsigned long flags;
908         uint32_t mbox_status;
909
910         dev_info(&ha->pdev->dev, "Starting firmware ...\n");
911
912         /*
913          * Start firmware from flash ROM
914          *
915          * WORKAROUND: Stuff a non-constant value that the firmware can
916          * use as a seed for a random number generator in MB7 prior to
917          * setting BOOT_ENABLE.  Fixes problem where the TCP
918          * connections use the same TCP ports after each reboot,
919          * causing some connections to not get re-established.
920          */
921         DEBUG(printk("scsi%d: %s: Start firmware from flash ROM\n",
922                      ha->host_no, __func__));
923
924         spin_lock_irqsave(&ha->hardware_lock, flags);
925         writel(jiffies, &ha->reg->mailbox[7]);
926         if (is_qla4022(ha) | is_qla4032(ha))
927                 writel(set_rmask(NVR_WRITE_ENABLE),
928                        &ha->reg->u1.isp4022.nvram);
929
930         writel(2, &ha->reg->mailbox[6]);
931         readl(&ha->reg->mailbox[6]);
932
933         writel(set_rmask(CSR_BOOT_ENABLE), &ha->reg->ctrl_status);
934         readl(&ha->reg->ctrl_status);
935         spin_unlock_irqrestore(&ha->hardware_lock, flags);
936
937         /* Wait for firmware to come UP. */
938         max_wait_time = FIRMWARE_UP_TOV * 4;
939         do {
940                 uint32_t ctrl_status;
941
942                 spin_lock_irqsave(&ha->hardware_lock, flags);
943                 ctrl_status = readw(&ha->reg->ctrl_status);
944                 mbox_status = readw(&ha->reg->mailbox[0]);
945                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
946
947                 if (ctrl_status & set_rmask(CSR_SCSI_PROCESSOR_INTR))
948                         break;
949                 if (mbox_status == MBOX_STS_COMMAND_COMPLETE)
950                         break;
951
952                 DEBUG2(printk("scsi%ld: %s: Waiting for boot firmware to "
953                               "complete... ctrl_sts=0x%x, remaining=%d\n",
954                               ha->host_no, __func__, ctrl_status,
955                               max_wait_time));
956
957                 msleep(250);
958         } while ((max_wait_time--));
959
960         if (mbox_status == MBOX_STS_COMMAND_COMPLETE) {
961                 DEBUG(printk("scsi%ld: %s: Firmware has started\n",
962                              ha->host_no, __func__));
963
964                 spin_lock_irqsave(&ha->hardware_lock, flags);
965                 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
966                        &ha->reg->ctrl_status);
967                 readl(&ha->reg->ctrl_status);
968                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
969
970                 status = QLA_SUCCESS;
971         } else {
972                 printk(KERN_INFO "scsi%ld: %s: Boot firmware failed "
973                        "-  mbox status 0x%x\n", ha->host_no, __func__,
974                        mbox_status);
975                 status = QLA_ERROR;
976         }
977         return status;
978 }
979
980 int ql4xxx_lock_drvr_wait(struct scsi_qla_host *a)
981 {
982 #define QL4_LOCK_DRVR_WAIT      60
983 #define QL4_LOCK_DRVR_SLEEP     1
984
985         int drvr_wait = QL4_LOCK_DRVR_WAIT;
986         while (drvr_wait) {
987                 if (ql4xxx_lock_drvr(a) == 0) {
988                         ssleep(QL4_LOCK_DRVR_SLEEP);
989                         if (drvr_wait) {
990                                 DEBUG2(printk("scsi%ld: %s: Waiting for "
991                                               "Global Init Semaphore(%d)...\n",
992                                               a->host_no,
993                                               __func__, drvr_wait));
994                         }
995                         drvr_wait -= QL4_LOCK_DRVR_SLEEP;
996                 } else {
997                         DEBUG2(printk("scsi%ld: %s: Global Init Semaphore "
998                                       "acquired\n", a->host_no, __func__));
999                         return QLA_SUCCESS;
1000                 }
1001         }
1002         return QLA_ERROR;
1003 }
1004
1005 /**
1006  * qla4xxx_start_firmware - starts qla4xxx firmware
1007  * @ha: Pointer to host adapter structure.
1008  *
1009  * This routine performs the neccessary steps to start the firmware for
1010  * the QLA4010 adapter.
1011  **/
1012 static int qla4xxx_start_firmware(struct scsi_qla_host *ha)
1013 {
1014         unsigned long flags = 0;
1015         uint32_t mbox_status;
1016         int status = QLA_ERROR;
1017         int soft_reset = 1;
1018         int config_chip = 0;
1019
1020         if (is_qla4022(ha) | is_qla4032(ha))
1021                 ql4xxx_set_mac_number(ha);
1022
1023         if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
1024                 return QLA_ERROR;
1025
1026         spin_lock_irqsave(&ha->hardware_lock, flags);
1027
1028         DEBUG2(printk("scsi%ld: %s: port_ctrl   = 0x%08X\n", ha->host_no,
1029                       __func__, readw(isp_port_ctrl(ha))));
1030         DEBUG(printk("scsi%ld: %s: port_status = 0x%08X\n", ha->host_no,
1031                      __func__, readw(isp_port_status(ha))));
1032
1033         /* Is Hardware already initialized? */
1034         if ((readw(isp_port_ctrl(ha)) & 0x8000) != 0) {
1035                 DEBUG(printk("scsi%ld: %s: Hardware has already been "
1036                              "initialized\n", ha->host_no, __func__));
1037
1038                 /* Receive firmware boot acknowledgement */
1039                 mbox_status = readw(&ha->reg->mailbox[0]);
1040
1041                 DEBUG2(printk("scsi%ld: %s: H/W Config complete - mbox[0]= "
1042                               "0x%x\n", ha->host_no, __func__, mbox_status));
1043
1044                 /* Is firmware already booted? */
1045                 if (mbox_status == 0) {
1046                         /* F/W not running, must be config by net driver */
1047                         config_chip = 1;
1048                         soft_reset = 0;
1049                 } else {
1050                         writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
1051                                &ha->reg->ctrl_status);
1052                         readl(&ha->reg->ctrl_status);
1053                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1054                         if (qla4xxx_get_firmware_state(ha) == QLA_SUCCESS) {
1055                                 DEBUG2(printk("scsi%ld: %s: Get firmware "
1056                                               "state -- state = 0x%x\n",
1057                                               ha->host_no,
1058                                               __func__, ha->firmware_state));
1059                                 /* F/W is running */
1060                                 if (ha->firmware_state &
1061                                     FW_STATE_CONFIG_WAIT) {
1062                                         DEBUG2(printk("scsi%ld: %s: Firmware "
1063                                                       "in known state -- "
1064                                                       "config and "
1065                                                       "boot, state = 0x%x\n",
1066                                                       ha->host_no, __func__,
1067                                                       ha->firmware_state));
1068                                         config_chip = 1;
1069                                         soft_reset = 0;
1070                                 }
1071                         } else {
1072                                 DEBUG2(printk("scsi%ld: %s: Firmware in "
1073                                               "unknown state -- resetting,"
1074                                               " state = "
1075                                               "0x%x\n", ha->host_no, __func__,
1076                                               ha->firmware_state));
1077                         }
1078                         spin_lock_irqsave(&ha->hardware_lock, flags);
1079                 }
1080         } else {
1081                 DEBUG(printk("scsi%ld: %s: H/W initialization hasn't been "
1082                              "started - resetting\n", ha->host_no, __func__));
1083         }
1084         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1085
1086         DEBUG(printk("scsi%ld: %s: Flags soft_rest=%d, config= %d\n ",
1087                      ha->host_no, __func__, soft_reset, config_chip));
1088         if (soft_reset) {
1089                 DEBUG(printk("scsi%ld: %s: Issue Soft Reset\n", ha->host_no,
1090                              __func__));
1091                 status = qla4xxx_soft_reset(ha);
1092                 if (status == QLA_ERROR) {
1093                         DEBUG(printk("scsi%d: %s: Soft Reset failed!\n",
1094                                      ha->host_no, __func__));
1095                         ql4xxx_unlock_drvr(ha);
1096                         return QLA_ERROR;
1097                 }
1098                 config_chip = 1;
1099
1100                 /* Reset clears the semaphore, so aquire again */
1101                 if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
1102                         return QLA_ERROR;
1103         }
1104
1105         if (config_chip) {
1106                 if ((status = qla4xxx_config_nvram(ha)) == QLA_SUCCESS)
1107                         status = qla4xxx_start_firmware_from_flash(ha);
1108         }
1109
1110         ql4xxx_unlock_drvr(ha);
1111         if (status == QLA_SUCCESS) {
1112                 qla4xxx_get_fw_version(ha);
1113                 if (test_and_clear_bit(AF_GET_CRASH_RECORD, &ha->flags))
1114                         qla4xxx_get_crash_record(ha);
1115         } else {
1116                 DEBUG(printk("scsi%ld: %s: Firmware has NOT started\n",
1117                              ha->host_no, __func__));
1118         }
1119         return status;
1120 }
1121
1122
1123 /**
1124  * qla4xxx_initialize_adapter - initiailizes hba
1125  * @ha: Pointer to host adapter structure.
1126  * @renew_ddb_list: Indicates what to do with the adapter's ddb list
1127  *      after adapter recovery has completed.
1128  *      0=preserve ddb list, 1=destroy and rebuild ddb list
1129  *
1130  * This routine parforms all of the steps necessary to initialize the adapter.
1131  *
1132  **/
1133 int qla4xxx_initialize_adapter(struct scsi_qla_host *ha,
1134                                uint8_t renew_ddb_list)
1135 {
1136         int status = QLA_ERROR;
1137         int8_t ip_address[IP_ADDR_LEN] = {0} ;
1138
1139         ha->eeprom_cmd_data = 0;
1140
1141         qla4x00_pci_config(ha);
1142
1143         qla4xxx_disable_intrs(ha);
1144
1145         /* Initialize the Host adapter request/response queues and firmware */
1146         if (qla4xxx_start_firmware(ha) == QLA_ERROR)
1147                 goto exit_init_hba;
1148
1149         if (qla4xxx_validate_mac_address(ha) == QLA_ERROR)
1150                 goto exit_init_hba;
1151
1152         if (qla4xxx_init_local_data(ha) == QLA_ERROR)
1153                 goto exit_init_hba;
1154
1155         status = qla4xxx_init_firmware(ha);
1156         if (status == QLA_ERROR)
1157                 goto exit_init_hba;
1158
1159         /*
1160          * FW is waiting to get an IP address from DHCP server: Skip building
1161          * the ddb_list and wait for DHCP lease acquired aen to come in
1162          * followed by 0x8014 aen" to trigger the tgt discovery process.
1163          */
1164         if (ha->firmware_state & FW_STATE_DHCP_IN_PROGRESS)
1165                 goto exit_init_online;
1166
1167         /* Skip device discovery if ip and subnet is zero */
1168         if (memcmp(ha->ip_address, ip_address, IP_ADDR_LEN) == 0 ||
1169             memcmp(ha->subnet_mask, ip_address, IP_ADDR_LEN) == 0)
1170                 goto exit_init_online;
1171
1172         if (renew_ddb_list == PRESERVE_DDB_LIST) {
1173                 /*
1174                  * We want to preserve lun states (i.e. suspended, etc.)
1175                  * for recovery initiated by the driver.  So just update
1176                  * the device states for the existing ddb_list.
1177                  */
1178                 qla4xxx_reinitialize_ddb_list(ha);
1179         } else if (renew_ddb_list == REBUILD_DDB_LIST) {
1180                 /*
1181                  * We want to build the ddb_list from scratch during
1182                  * driver initialization and recovery initiated by the
1183                  * INT_HBA_RESET IOCTL.
1184                  */
1185                 status = qla4xxx_initialize_ddb_list(ha);
1186                 if (status == QLA_ERROR) {
1187                         DEBUG2(printk("%s(%ld) Error occurred during build"
1188                                       "ddb list\n", __func__, ha->host_no));
1189                         goto exit_init_hba;
1190                 }
1191
1192         }
1193         if (!ha->tot_ddbs) {
1194                 DEBUG2(printk("scsi%ld: Failed to initialize devices or none "
1195                               "present in Firmware device database\n",
1196                               ha->host_no));
1197         }
1198
1199 exit_init_online:
1200         set_bit(AF_ONLINE, &ha->flags);
1201 exit_init_hba:
1202         return status;
1203 }
1204
1205 /**
1206  * qla4xxx_add_device_dynamically - ddb addition due to an AEN
1207  * @ha:  Pointer to host adapter structure.
1208  * @fw_ddb_index:  Firmware's device database index
1209  *
1210  * This routine processes adds a device as a result of an 8014h AEN.
1211  **/
1212 static void qla4xxx_add_device_dynamically(struct scsi_qla_host *ha,
1213                                            uint32_t fw_ddb_index)
1214 {
1215         struct ddb_entry * ddb_entry;
1216         uint32_t new_tgt;
1217
1218         /* First allocate a device structure */
1219         ddb_entry = qla4xxx_get_ddb_entry(ha, fw_ddb_index, &new_tgt);
1220         if (ddb_entry == NULL) {
1221                 DEBUG2(printk(KERN_WARNING
1222                               "scsi%ld: Unable to allocate memory to add "
1223                               "fw_ddb_index %d\n", ha->host_no, fw_ddb_index));
1224                 return;
1225         }
1226
1227         if (!new_tgt && (ddb_entry->fw_ddb_index != fw_ddb_index)) {
1228                 /* Target has been bound to a new fw_ddb_index */
1229                 qla4xxx_free_ddb(ha, ddb_entry);
1230                 ddb_entry = qla4xxx_alloc_ddb(ha, fw_ddb_index);
1231                 if (ddb_entry == NULL) {
1232                         DEBUG2(printk(KERN_WARNING
1233                                 "scsi%ld: Unable to allocate memory"
1234                                 " to add fw_ddb_index %d\n",
1235                                 ha->host_no, fw_ddb_index));
1236                         return;
1237                 }
1238         }
1239         if (qla4xxx_update_ddb_entry(ha, ddb_entry, fw_ddb_index) ==
1240                                     QLA_ERROR) {
1241                 ha->fw_ddb_index_map[fw_ddb_index] =
1242                                         (struct ddb_entry *)INVALID_ENTRY;
1243                 DEBUG2(printk(KERN_WARNING
1244                               "scsi%ld: failed to add new device at index "
1245                               "[%d]\n Unable to retrieve fw ddb entry\n",
1246                               ha->host_no, fw_ddb_index));
1247                 qla4xxx_free_ddb(ha, ddb_entry);
1248                 return;
1249         }
1250
1251         if (qla4xxx_add_sess(ddb_entry)) {
1252                 DEBUG2(printk(KERN_WARNING
1253                               "scsi%ld: failed to add new device at index "
1254                               "[%d]\n Unable to add connection and session\n",
1255                               ha->host_no, fw_ddb_index));
1256                 qla4xxx_free_ddb(ha, ddb_entry);
1257         }
1258 }
1259
1260 /**
1261  * qla4xxx_process_ddb_changed - process ddb state change
1262  * @ha - Pointer to host adapter structure.
1263  * @fw_ddb_index - Firmware's device database index
1264  * @state - Device state
1265  *
1266  * This routine processes a Decive Database Changed AEN Event.
1267  **/
1268 int qla4xxx_process_ddb_changed(struct scsi_qla_host *ha,
1269                                 uint32_t fw_ddb_index, uint32_t state)
1270 {
1271         struct ddb_entry * ddb_entry;
1272         uint32_t old_fw_ddb_device_state;
1273
1274         /* check for out of range index */
1275         if (fw_ddb_index >= MAX_DDB_ENTRIES)
1276                 return QLA_ERROR;
1277
1278         /* Get the corresponging ddb entry */
1279         ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, fw_ddb_index);
1280         /* Device does not currently exist in our database. */
1281         if (ddb_entry == NULL) {
1282                 if (state == DDB_DS_SESSION_ACTIVE)
1283                         qla4xxx_add_device_dynamically(ha, fw_ddb_index);
1284                 return QLA_SUCCESS;
1285         }
1286
1287         /* Device already exists in our database. */
1288         old_fw_ddb_device_state = ddb_entry->fw_ddb_device_state;
1289         DEBUG2(printk("scsi%ld: %s DDB - old state= 0x%x, new state=0x%x for "
1290                       "index [%d]\n", ha->host_no, __func__,
1291                       ddb_entry->fw_ddb_device_state, state, fw_ddb_index));
1292         if (old_fw_ddb_device_state == state &&
1293             state == DDB_DS_SESSION_ACTIVE) {
1294                 /* Do nothing, state not changed. */
1295                 return QLA_SUCCESS;
1296         }
1297
1298         ddb_entry->fw_ddb_device_state = state;
1299         /* Device is back online. */
1300         if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) {
1301                 atomic_set(&ddb_entry->port_down_timer,
1302                            ha->port_down_retry_count);
1303                 atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
1304                 atomic_set(&ddb_entry->relogin_retry_count, 0);
1305                 atomic_set(&ddb_entry->relogin_timer, 0);
1306                 clear_bit(DF_RELOGIN, &ddb_entry->flags);
1307                 clear_bit(DF_NO_RELOGIN, &ddb_entry->flags);
1308                 iscsi_if_create_session_done(ddb_entry->conn);
1309                 /*
1310                  * Change the lun state to READY in case the lun TIMEOUT before
1311                  * the device came back.
1312                  */
1313         } else {
1314                 /* Device went away, try to relogin. */
1315                 /* Mark device missing */
1316                 if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
1317                         qla4xxx_mark_device_missing(ha, ddb_entry);
1318                 /*
1319                  * Relogin if device state changed to a not active state.
1320                  * However, do not relogin if this aen is a result of an IOCTL
1321                  * logout (DF_NO_RELOGIN) or if this is a discovered device.
1322                  */
1323                 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_FAILED &&
1324                     !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
1325                     !test_bit(DF_NO_RELOGIN, &ddb_entry->flags) &&
1326                     !test_bit(DF_ISNS_DISCOVERED, &ddb_entry->flags)) {
1327                         /*
1328                          * This triggers a relogin.  After the relogin_timer
1329                          * expires, the relogin gets scheduled.  We must wait a
1330                          * minimum amount of time since receiving an 0x8014 AEN
1331                          * with failed device_state or a logout response before
1332                          * we can issue another relogin.
1333                          */
1334                         /* Firmware padds this timeout: (time2wait +1).
1335                          * Driver retry to login should be longer than F/W.
1336                          * Otherwise F/W will fail
1337                          * set_ddb() mbx cmd with 0x4005 since it still
1338                          * counting down its time2wait.
1339                          */
1340                         atomic_set(&ddb_entry->relogin_timer, 0);
1341                         atomic_set(&ddb_entry->retry_relogin_timer,
1342                                    ddb_entry->default_time2wait + 4);
1343                 }
1344         }
1345
1346         return QLA_SUCCESS;
1347 }
1348