tree-wide: fix assorted typos all over the place
[linux-2.6.git] / drivers / scsi / megaraid / megaraid_mbox.c
1 /*
2  *
3  *                      Linux MegaRAID device driver
4  *
5  * Copyright (c) 2003-2004  LSI Logic Corporation.
6  *
7  *         This program is free software; you can redistribute it and/or
8  *         modify it under the terms of the GNU General Public License
9  *         as published by the Free Software Foundation; either version
10  *         2 of the License, or (at your option) any later version.
11  *
12  * FILE         : megaraid_mbox.c
13  * Version      : v2.20.5.1 (Nov 16 2006)
14  *
15  * Authors:
16  *      Atul Mukker             <Atul.Mukker@lsi.com>
17  *      Sreenivas Bagalkote     <Sreenivas.Bagalkote@lsi.com>
18  *      Manoj Jose              <Manoj.Jose@lsi.com>
19  *      Seokmann Ju
20  *
21  * List of supported controllers
22  *
23  * OEM  Product Name                    VID     DID     SSVID   SSID
24  * ---  ------------                    ---     ---     ----    ----
25  * Dell PERC3/QC                        101E    1960    1028    0471
26  * Dell PERC3/DC                        101E    1960    1028    0493
27  * Dell PERC3/SC                        101E    1960    1028    0475
28  * Dell PERC3/Di                        1028    1960    1028    0123
29  * Dell PERC4/SC                        1000    1960    1028    0520
30  * Dell PERC4/DC                        1000    1960    1028    0518
31  * Dell PERC4/QC                        1000    0407    1028    0531
32  * Dell PERC4/Di                        1028    000F    1028    014A
33  * Dell PERC 4e/Si                      1028    0013    1028    016c
34  * Dell PERC 4e/Di                      1028    0013    1028    016d
35  * Dell PERC 4e/Di                      1028    0013    1028    016e
36  * Dell PERC 4e/Di                      1028    0013    1028    016f
37  * Dell PERC 4e/Di                      1028    0013    1028    0170
38  * Dell PERC 4e/DC                      1000    0408    1028    0002
39  * Dell PERC 4e/SC                      1000    0408    1028    0001
40  *
41  *
42  * LSI MegaRAID SCSI 320-0              1000    1960    1000    A520
43  * LSI MegaRAID SCSI 320-1              1000    1960    1000    0520
44  * LSI MegaRAID SCSI 320-2              1000    1960    1000    0518
45  * LSI MegaRAID SCSI 320-0X             1000    0407    1000    0530
46  * LSI MegaRAID SCSI 320-2X             1000    0407    1000    0532
47  * LSI MegaRAID SCSI 320-4X             1000    0407    1000    0531
48  * LSI MegaRAID SCSI 320-1E             1000    0408    1000    0001
49  * LSI MegaRAID SCSI 320-2E             1000    0408    1000    0002
50  * LSI MegaRAID SATA 150-4              1000    1960    1000    4523
51  * LSI MegaRAID SATA 150-6              1000    1960    1000    0523
52  * LSI MegaRAID SATA 300-4X             1000    0409    1000    3004
53  * LSI MegaRAID SATA 300-8X             1000    0409    1000    3008
54  *
55  * INTEL RAID Controller SRCU42X        1000    0407    8086    0532
56  * INTEL RAID Controller SRCS16         1000    1960    8086    0523
57  * INTEL RAID Controller SRCU42E        1000    0408    8086    0002
58  * INTEL RAID Controller SRCZCRX        1000    0407    8086    0530
59  * INTEL RAID Controller SRCS28X        1000    0409    8086    3008
60  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3431
61  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3499
62  * INTEL RAID Controller SRCU51L        1000    1960    8086    0520
63  *
64  * FSC  MegaRAID PCI Express ROMB       1000    0408    1734    1065
65  *
66  * ACER MegaRAID ROMB-2E                1000    0408    1025    004D
67  *
68  * NEC  MegaRAID PCI Express ROMB       1000    0408    1033    8287
69  *
70  * For history of changes, see Documentation/ChangeLog.megaraid
71  */
72
73 #include "megaraid_mbox.h"
74
75 static int megaraid_init(void);
76 static void megaraid_exit(void);
77
78 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
79 static void megaraid_detach_one(struct pci_dev *);
80 static void megaraid_mbox_shutdown(struct pci_dev *);
81
82 static int megaraid_io_attach(adapter_t *);
83 static void megaraid_io_detach(adapter_t *);
84
85 static int megaraid_init_mbox(adapter_t *);
86 static void megaraid_fini_mbox(adapter_t *);
87
88 static int megaraid_alloc_cmd_packets(adapter_t *);
89 static void megaraid_free_cmd_packets(adapter_t *);
90
91 static int megaraid_mbox_setup_dma_pools(adapter_t *);
92 static void megaraid_mbox_teardown_dma_pools(adapter_t *);
93
94 static int megaraid_sysfs_alloc_resources(adapter_t *);
95 static void megaraid_sysfs_free_resources(adapter_t *);
96
97 static int megaraid_abort_handler(struct scsi_cmnd *);
98 static int megaraid_reset_handler(struct scsi_cmnd *);
99
100 static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
101 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
102 static int megaraid_busywait_mbox(mraid_device_t *);
103 static int megaraid_mbox_product_info(adapter_t *);
104 static int megaraid_mbox_extended_cdb(adapter_t *);
105 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
106 static int megaraid_mbox_support_random_del(adapter_t *);
107 static int megaraid_mbox_get_max_sg(adapter_t *);
108 static void megaraid_mbox_enum_raid_scsi(adapter_t *);
109 static void megaraid_mbox_flush_cache(adapter_t *);
110 static int megaraid_mbox_fire_sync_cmd(adapter_t *);
111
112 static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
113 static void megaraid_mbox_setup_device_map(adapter_t *);
114
115 static int megaraid_queue_command(struct scsi_cmnd *,
116                 void (*)(struct scsi_cmnd *));
117 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
118 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
119 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
120                 struct scsi_cmnd *);
121 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
122                 struct scsi_cmnd *);
123
124 static irqreturn_t megaraid_isr(int, void *);
125
126 static void megaraid_mbox_dpc(unsigned long);
127
128 static ssize_t megaraid_sysfs_show_app_hndl(struct device *, struct device_attribute *attr, char *);
129 static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *);
130
131 static int megaraid_cmm_register(adapter_t *);
132 static int megaraid_cmm_unregister(adapter_t *);
133 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
134 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
135 static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
136 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
137 static int wait_till_fw_empty(adapter_t *);
138
139
140
141 MODULE_AUTHOR("megaraidlinux@lsi.com");
142 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
143 MODULE_LICENSE("GPL");
144 MODULE_VERSION(MEGARAID_VERSION);
145
146 /*
147  * ### modules parameters for driver ###
148  */
149
150 /*
151  * Set to enable driver to expose unconfigured disk to kernel
152  */
153 static int megaraid_expose_unconf_disks = 0;
154 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
155 MODULE_PARM_DESC(unconf_disks,
156         "Set to expose unconfigured disks to kernel (default=0)");
157
158 /*
159  * driver wait time if the adapter's mailbox is busy
160  */
161 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
162 module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
163 MODULE_PARM_DESC(busy_wait,
164         "Max wait for mailbox in microseconds if busy (default=10)");
165
166 /*
167  * number of sectors per IO command
168  */
169 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
170 module_param_named(max_sectors, megaraid_max_sectors, int, 0);
171 MODULE_PARM_DESC(max_sectors,
172         "Maximum number of sectors per IO command (default=128)");
173
174 /*
175  * number of commands per logical unit
176  */
177 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
178 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
179 MODULE_PARM_DESC(cmd_per_lun,
180         "Maximum number of commands per logical unit (default=64)");
181
182
183 /*
184  * Fast driver load option, skip scanning for physical devices during load.
185  * This would result in non-disk devices being skipped during driver load
186  * time. These can be later added though, using /proc/scsi/scsi
187  */
188 static unsigned int megaraid_fast_load = 0;
189 module_param_named(fast_load, megaraid_fast_load, int, 0);
190 MODULE_PARM_DESC(fast_load,
191         "Faster loading of the driver, skips physical devices! (default=0)");
192
193
194 /*
195  * mraid_debug level - threshold for amount of information to be displayed by
196  * the driver. This level can be changed through modules parameters, ioctl or
197  * sysfs/proc interface. By default, print the announcement messages only.
198  */
199 int mraid_debug_level = CL_ANN;
200 module_param_named(debug_level, mraid_debug_level, int, 0);
201 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
202
203 /*
204  * ### global data ###
205  */
206 static uint8_t megaraid_mbox_version[8] =
207         { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 };
208
209
210 /*
211  * PCI table for all supported controllers.
212  */
213 static struct pci_device_id pci_id_table_g[] =  {
214         {
215                 PCI_VENDOR_ID_DELL,
216                 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
217                 PCI_VENDOR_ID_DELL,
218                 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
219         },
220         {
221                 PCI_VENDOR_ID_LSI_LOGIC,
222                 PCI_DEVICE_ID_PERC4_SC,
223                 PCI_VENDOR_ID_DELL,
224                 PCI_SUBSYS_ID_PERC4_SC,
225         },
226         {
227                 PCI_VENDOR_ID_LSI_LOGIC,
228                 PCI_DEVICE_ID_PERC4_DC,
229                 PCI_VENDOR_ID_DELL,
230                 PCI_SUBSYS_ID_PERC4_DC,
231         },
232         {
233                 PCI_VENDOR_ID_LSI_LOGIC,
234                 PCI_DEVICE_ID_VERDE,
235                 PCI_ANY_ID,
236                 PCI_ANY_ID,
237         },
238         {
239                 PCI_VENDOR_ID_DELL,
240                 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
241                 PCI_VENDOR_ID_DELL,
242                 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
243         },
244         {
245                 PCI_VENDOR_ID_DELL,
246                 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
247                 PCI_VENDOR_ID_DELL,
248                 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
249         },
250         {
251                 PCI_VENDOR_ID_DELL,
252                 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
253                 PCI_VENDOR_ID_DELL,
254                 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
255         },
256         {
257                 PCI_VENDOR_ID_DELL,
258                 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
259                 PCI_VENDOR_ID_DELL,
260                 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
261         },
262         {
263                 PCI_VENDOR_ID_DELL,
264                 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
265                 PCI_VENDOR_ID_DELL,
266                 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
267         },
268         {
269                 PCI_VENDOR_ID_DELL,
270                 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
271                 PCI_VENDOR_ID_DELL,
272                 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
273         },
274         {
275                 PCI_VENDOR_ID_LSI_LOGIC,
276                 PCI_DEVICE_ID_DOBSON,
277                 PCI_ANY_ID,
278                 PCI_ANY_ID,
279         },
280         {
281                 PCI_VENDOR_ID_AMI,
282                 PCI_DEVICE_ID_AMI_MEGARAID3,
283                 PCI_ANY_ID,
284                 PCI_ANY_ID,
285         },
286         {
287                 PCI_VENDOR_ID_LSI_LOGIC,
288                 PCI_DEVICE_ID_AMI_MEGARAID3,
289                 PCI_ANY_ID,
290                 PCI_ANY_ID,
291         },
292         {
293                 PCI_VENDOR_ID_LSI_LOGIC,
294                 PCI_DEVICE_ID_LINDSAY,
295                 PCI_ANY_ID,
296                 PCI_ANY_ID,
297         },
298         {0}     /* Terminating entry */
299 };
300 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
301
302
303 static struct pci_driver megaraid_pci_driver = {
304         .name           = "megaraid",
305         .id_table       = pci_id_table_g,
306         .probe          = megaraid_probe_one,
307         .remove         = __devexit_p(megaraid_detach_one),
308         .shutdown       = megaraid_mbox_shutdown,
309 };
310
311
312
313 // definitions for the device attributes for exporting logical drive number
314 // for a scsi address (Host, Channel, Id, Lun)
315
316 DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
317                 NULL);
318
319 // Host template initializer for megaraid mbox sysfs device attributes
320 static struct device_attribute *megaraid_shost_attrs[] = {
321         &dev_attr_megaraid_mbox_app_hndl,
322         NULL,
323 };
324
325
326 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
327
328 // Host template initializer for megaraid mbox sysfs device attributes
329 static struct device_attribute *megaraid_sdev_attrs[] = {
330         &dev_attr_megaraid_mbox_ld,
331         NULL,
332 };
333
334 /**
335  * megaraid_change_queue_depth - Change the device's queue depth
336  * @sdev:       scsi device struct
337  * @qdepth:     depth to set
338  *
339  * Return value:
340  *      actual depth set
341  */
342 static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth)
343 {
344         if (qdepth > MBOX_MAX_SCSI_CMDS)
345                 qdepth = MBOX_MAX_SCSI_CMDS;
346         scsi_adjust_queue_depth(sdev, 0, qdepth);
347         return sdev->queue_depth;
348 }
349
350 /*
351  * Scsi host template for megaraid unified driver
352  */
353 static struct scsi_host_template megaraid_template_g = {
354         .module                         = THIS_MODULE,
355         .name                           = "LSI Logic MegaRAID driver",
356         .proc_name                      = "megaraid",
357         .queuecommand                   = megaraid_queue_command,
358         .eh_abort_handler               = megaraid_abort_handler,
359         .eh_device_reset_handler        = megaraid_reset_handler,
360         .eh_bus_reset_handler           = megaraid_reset_handler,
361         .eh_host_reset_handler          = megaraid_reset_handler,
362         .change_queue_depth             = megaraid_change_queue_depth,
363         .use_clustering                 = ENABLE_CLUSTERING,
364         .sdev_attrs                     = megaraid_sdev_attrs,
365         .shost_attrs                    = megaraid_shost_attrs,
366 };
367
368
369 /**
370  * megaraid_init - module load hook
371  *
372  * We register ourselves as hotplug enabled module and let PCI subsystem
373  * discover our adapters.
374  */
375 static int __init
376 megaraid_init(void)
377 {
378         int     rval;
379
380         // Announce the driver version
381         con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
382                 MEGARAID_EXT_VERSION));
383
384         // check validity of module parameters
385         if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
386
387                 con_log(CL_ANN, (KERN_WARNING
388                         "megaraid mailbox: max commands per lun reset to %d\n",
389                         MBOX_MAX_SCSI_CMDS));
390
391                 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
392         }
393
394
395         // register as a PCI hot-plug driver module
396         rval = pci_register_driver(&megaraid_pci_driver);
397         if (rval < 0) {
398                 con_log(CL_ANN, (KERN_WARNING
399                         "megaraid: could not register hotplug support.\n"));
400         }
401
402         return rval;
403 }
404
405
406 /**
407  * megaraid_exit - driver unload entry point
408  *
409  * We simply unwrap the megaraid_init routine here.
410  */
411 static void __exit
412 megaraid_exit(void)
413 {
414         con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
415
416         // unregister as PCI hotplug driver
417         pci_unregister_driver(&megaraid_pci_driver);
418
419         return;
420 }
421
422
423 /**
424  * megaraid_probe_one - PCI hotplug entry point
425  * @pdev        : handle to this controller's PCI configuration space
426  * @id          : pci device id of the class of controllers
427  *
428  * This routine should be called whenever a new adapter is detected by the
429  * PCI hotplug susbsystem.
430  */
431 static int __devinit
432 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
433 {
434         adapter_t       *adapter;
435
436
437         // detected a new controller
438         con_log(CL_ANN, (KERN_INFO
439                 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
440                 pdev->vendor, pdev->device, pdev->subsystem_vendor,
441                 pdev->subsystem_device));
442
443         con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
444                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
445
446         if (pci_enable_device(pdev)) {
447                 con_log(CL_ANN, (KERN_WARNING
448                                 "megaraid: pci_enable_device failed\n"));
449
450                 return -ENODEV;
451         }
452
453         // Enable bus-mastering on this controller
454         pci_set_master(pdev);
455
456         // Allocate the per driver initialization structure
457         adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL);
458
459         if (adapter == NULL) {
460                 con_log(CL_ANN, (KERN_WARNING
461                 "megaraid: out of memory, %s %d.\n", __func__, __LINE__));
462
463                 goto out_probe_one;
464         }
465
466
467         // set up PCI related soft state and other pre-known parameters
468         adapter->unique_id      = pdev->bus->number << 8 | pdev->devfn;
469         adapter->irq            = pdev->irq;
470         adapter->pdev           = pdev;
471
472         atomic_set(&adapter->being_detached, 0);
473
474         // Setup the default DMA mask. This would be changed later on
475         // depending on hardware capabilities
476         if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(32)) != 0) {
477
478                 con_log(CL_ANN, (KERN_WARNING
479                         "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
480
481                 goto out_free_adapter;
482         }
483
484
485         // Initialize the synchronization lock for kernel and LLD
486         spin_lock_init(&adapter->lock);
487
488         // Initialize the command queues: the list of free SCBs and the list
489         // of pending SCBs.
490         INIT_LIST_HEAD(&adapter->kscb_pool);
491         spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
492
493         INIT_LIST_HEAD(&adapter->pend_list);
494         spin_lock_init(PENDING_LIST_LOCK(adapter));
495
496         INIT_LIST_HEAD(&adapter->completed_list);
497         spin_lock_init(COMPLETED_LIST_LOCK(adapter));
498
499
500         // Start the mailbox based controller
501         if (megaraid_init_mbox(adapter) != 0) {
502                 con_log(CL_ANN, (KERN_WARNING
503                         "megaraid: maibox adapter did not initialize\n"));
504
505                 goto out_free_adapter;
506         }
507
508         // Register with LSI Common Management Module
509         if (megaraid_cmm_register(adapter) != 0) {
510
511                 con_log(CL_ANN, (KERN_WARNING
512                 "megaraid: could not register with management module\n"));
513
514                 goto out_fini_mbox;
515         }
516
517         // setup adapter handle in PCI soft state
518         pci_set_drvdata(pdev, adapter);
519
520         // attach with scsi mid-layer
521         if (megaraid_io_attach(adapter) != 0) {
522
523                 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
524
525                 goto out_cmm_unreg;
526         }
527
528         return 0;
529
530 out_cmm_unreg:
531         pci_set_drvdata(pdev, NULL);
532         megaraid_cmm_unregister(adapter);
533 out_fini_mbox:
534         megaraid_fini_mbox(adapter);
535 out_free_adapter:
536         kfree(adapter);
537 out_probe_one:
538         pci_disable_device(pdev);
539
540         return -ENODEV;
541 }
542
543
544 /**
545  * megaraid_detach_one - release framework resources and call LLD release routine
546  * @pdev        : handle for our PCI cofiguration space
547  *
548  * This routine is called during driver unload. We free all the allocated
549  * resources and call the corresponding LLD so that it can also release all
550  * its resources.
551  *
552  * This routine is also called from the PCI hotplug system.
553  */
554 static void
555 megaraid_detach_one(struct pci_dev *pdev)
556 {
557         adapter_t               *adapter;
558         struct Scsi_Host        *host;
559
560
561         // Start a rollback on this adapter
562         adapter = pci_get_drvdata(pdev);
563
564         if (!adapter) {
565                 con_log(CL_ANN, (KERN_CRIT
566                 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
567                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
568                         pdev->subsystem_device));
569
570                 return;
571         }
572         else {
573                 con_log(CL_ANN, (KERN_NOTICE
574                 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
575                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
576                         pdev->subsystem_device));
577         }
578
579
580         host = adapter->host;
581
582         // do not allow any more requests from the management module for this
583         // adapter.
584         // FIXME: How do we account for the request which might still be
585         // pending with us?
586         atomic_set(&adapter->being_detached, 1);
587
588         // detach from the IO sub-system
589         megaraid_io_detach(adapter);
590
591         // reset the device state in the PCI structure. We check this
592         // condition when we enter here. If the device state is NULL,
593         // that would mean the device has already been removed
594         pci_set_drvdata(pdev, NULL);
595
596         // Unregister from common management module
597         //
598         // FIXME: this must return success or failure for conditions if there
599         // is a command pending with LLD or not.
600         megaraid_cmm_unregister(adapter);
601
602         // finalize the mailbox based controller and release all resources
603         megaraid_fini_mbox(adapter);
604
605         kfree(adapter);
606
607         scsi_host_put(host);
608
609         pci_disable_device(pdev);
610
611         return;
612 }
613
614
615 /**
616  * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
617  * @pdev                : generic driver model device
618  *
619  * Shutdown notification, perform flush cache.
620  */
621 static void
622 megaraid_mbox_shutdown(struct pci_dev *pdev)
623 {
624         adapter_t               *adapter = pci_get_drvdata(pdev);
625         static int              counter;
626
627         if (!adapter) {
628                 con_log(CL_ANN, (KERN_WARNING
629                         "megaraid: null device in shutdown\n"));
630                 return;
631         }
632
633         // flush caches now
634         con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
635                 counter++));
636
637         megaraid_mbox_flush_cache(adapter);
638
639         con_log(CL_ANN, ("done\n"));
640 }
641
642
643 /**
644  * megaraid_io_attach - attach a device with the IO subsystem
645  * @adapter             : controller's soft state
646  *
647  * Attach this device with the IO subsystem.
648  */
649 static int
650 megaraid_io_attach(adapter_t *adapter)
651 {
652         struct Scsi_Host        *host;
653
654         // Initialize SCSI Host structure
655         host = scsi_host_alloc(&megaraid_template_g, 8);
656         if (!host) {
657                 con_log(CL_ANN, (KERN_WARNING
658                         "megaraid mbox: scsi_register failed\n"));
659
660                 return -1;
661         }
662
663         SCSIHOST2ADAP(host)     = (caddr_t)adapter;
664         adapter->host           = host;
665
666         host->irq               = adapter->irq;
667         host->unique_id         = adapter->unique_id;
668         host->can_queue         = adapter->max_cmds;
669         host->this_id           = adapter->init_id;
670         host->sg_tablesize      = adapter->sglen;
671         host->max_sectors       = adapter->max_sectors;
672         host->cmd_per_lun       = adapter->cmd_per_lun;
673         host->max_channel       = adapter->max_channel;
674         host->max_id            = adapter->max_target;
675         host->max_lun           = adapter->max_lun;
676
677
678         // notify mid-layer about the new controller
679         if (scsi_add_host(host, &adapter->pdev->dev)) {
680
681                 con_log(CL_ANN, (KERN_WARNING
682                         "megaraid mbox: scsi_add_host failed\n"));
683
684                 scsi_host_put(host);
685
686                 return -1;
687         }
688
689         scsi_scan_host(host);
690
691         return 0;
692 }
693
694
695 /**
696  * megaraid_io_detach - detach a device from the IO subsystem
697  * @adapter             : controller's soft state
698  *
699  * Detach this device from the IO subsystem.
700  */
701 static void
702 megaraid_io_detach(adapter_t *adapter)
703 {
704         struct Scsi_Host        *host;
705
706         con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
707
708         host = adapter->host;
709
710         scsi_remove_host(host);
711
712         return;
713 }
714
715
716 /*
717  * START: Mailbox Low Level Driver
718  *
719  * This is section specific to the single mailbox based controllers
720  */
721
722 /**
723  * megaraid_init_mbox - initialize controller
724  * @adapter             : our soft state
725  *
726  * - Allocate 16-byte aligned mailbox memory for firmware handshake
727  * - Allocate controller's memory resources
728  * - Find out all initialization data
729  * - Allocate memory required for all the commands
730  * - Use internal library of FW routines, build up complete soft state
731  */
732 static int __devinit
733 megaraid_init_mbox(adapter_t *adapter)
734 {
735         struct pci_dev          *pdev;
736         mraid_device_t          *raid_dev;
737         int                     i;
738         uint32_t                magic64;
739
740
741         adapter->ito    = MBOX_TIMEOUT;
742         pdev            = adapter->pdev;
743
744         /*
745          * Allocate and initialize the init data structure for mailbox
746          * controllers
747          */
748         raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL);
749         if (raid_dev == NULL) return -1;
750
751
752         /*
753          * Attach the adapter soft state to raid device soft state
754          */
755         adapter->raid_device    = (caddr_t)raid_dev;
756         raid_dev->fast_load     = megaraid_fast_load;
757
758
759         // our baseport
760         raid_dev->baseport = pci_resource_start(pdev, 0);
761
762         if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
763
764                 con_log(CL_ANN, (KERN_WARNING
765                                 "megaraid: mem region busy\n"));
766
767                 goto out_free_raid_dev;
768         }
769
770         raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
771
772         if (!raid_dev->baseaddr) {
773
774                 con_log(CL_ANN, (KERN_WARNING
775                         "megaraid: could not map hba memory\n") );
776
777                 goto out_release_regions;
778         }
779
780         /* initialize the mutual exclusion lock for the mailbox */
781         spin_lock_init(&raid_dev->mailbox_lock);
782
783         /* allocate memory required for commands */
784         if (megaraid_alloc_cmd_packets(adapter) != 0)
785                 goto out_iounmap;
786
787         /*
788          * Issue SYNC cmd to flush the pending cmds in the adapter
789          * and initialize its internal state
790          */
791
792         if (megaraid_mbox_fire_sync_cmd(adapter))
793                 con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
794
795         /*
796          * Setup the rest of the soft state using the library of
797          * FW routines
798          */
799
800         /* request IRQ and register the interrupt service routine */
801         if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
802                 adapter)) {
803
804                 con_log(CL_ANN, (KERN_WARNING
805                         "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
806                 goto out_alloc_cmds;
807
808         }
809
810         // Product info
811         if (megaraid_mbox_product_info(adapter) != 0)
812                 goto out_free_irq;
813
814         // Do we support extended CDBs
815         adapter->max_cdb_sz = 10;
816         if (megaraid_mbox_extended_cdb(adapter) == 0) {
817                 adapter->max_cdb_sz = 16;
818         }
819
820         /*
821          * Do we support cluster environment, if we do, what is the initiator
822          * id.
823          * NOTE: In a non-cluster aware firmware environment, the LLD should
824          * return 7 as initiator id.
825          */
826         adapter->ha             = 0;
827         adapter->init_id        = -1;
828         if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
829                 adapter->ha = 1;
830         }
831
832         /*
833          * Prepare the device ids array to have the mapping between the kernel
834          * device address and megaraid device address.
835          * We export the physical devices on their actual addresses. The
836          * logical drives are exported on a virtual SCSI channel
837          */
838         megaraid_mbox_setup_device_map(adapter);
839
840         // If the firmware supports random deletion, update the device id map
841         if (megaraid_mbox_support_random_del(adapter)) {
842
843                 // Change the logical drives numbers in device_ids array one
844                 // slot in device_ids is reserved for target id, that's why
845                 // "<=" below
846                 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
847                         adapter->device_ids[adapter->max_channel][i] += 0x80;
848                 }
849                 adapter->device_ids[adapter->max_channel][adapter->init_id] =
850                         0xFF;
851
852                 raid_dev->random_del_supported = 1;
853         }
854
855         /*
856          * find out the maximum number of scatter-gather elements supported by
857          * this firmware
858          */
859         adapter->sglen = megaraid_mbox_get_max_sg(adapter);
860
861         // enumerate RAID and SCSI channels so that all devices on SCSI
862         // channels can later be exported, including disk devices
863         megaraid_mbox_enum_raid_scsi(adapter);
864
865         /*
866          * Other parameters required by upper layer
867          *
868          * maximum number of sectors per IO command
869          */
870         adapter->max_sectors = megaraid_max_sectors;
871
872         /*
873          * number of queued commands per LUN.
874          */
875         adapter->cmd_per_lun = megaraid_cmd_per_lun;
876
877         /*
878          * Allocate resources required to issue FW calls, when sysfs is
879          * accessed
880          */
881         if (megaraid_sysfs_alloc_resources(adapter) != 0)
882                 goto out_free_irq;
883
884         // Set the DMA mask to 64-bit. All supported controllers as capable of
885         // DMA in this range
886         pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
887
888         if (((magic64 == HBA_SIGNATURE_64_BIT) &&
889                 ((adapter->pdev->subsystem_device !=
890                 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
891                 (adapter->pdev->subsystem_device !=
892                 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
893                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
894                 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
895                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
896                 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
897                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
898                 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
899                 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
900                 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
901                 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
902                 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
903                 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(64))) {
904                         con_log(CL_ANN, (KERN_WARNING
905                                 "megaraid: DMA mask for 64-bit failed\n"));
906
907                         if (pci_set_dma_mask (adapter->pdev, DMA_BIT_MASK(32))) {
908                                 con_log(CL_ANN, (KERN_WARNING
909                                         "megaraid: 32-bit DMA mask failed\n"));
910                                 goto out_free_sysfs_res;
911                         }
912                 }
913         }
914
915         // setup tasklet for DPC
916         tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
917                         (unsigned long)adapter);
918
919         con_log(CL_DLEVEL1, (KERN_INFO
920                 "megaraid mbox hba successfully initialized\n"));
921
922         return 0;
923
924 out_free_sysfs_res:
925         megaraid_sysfs_free_resources(adapter);
926 out_free_irq:
927         free_irq(adapter->irq, adapter);
928 out_alloc_cmds:
929         megaraid_free_cmd_packets(adapter);
930 out_iounmap:
931         iounmap(raid_dev->baseaddr);
932 out_release_regions:
933         pci_release_regions(pdev);
934 out_free_raid_dev:
935         kfree(raid_dev);
936
937         return -1;
938 }
939
940
941 /**
942  * megaraid_fini_mbox - undo controller initialization
943  * @adapter             : our soft state
944  */
945 static void
946 megaraid_fini_mbox(adapter_t *adapter)
947 {
948         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
949
950         // flush all caches
951         megaraid_mbox_flush_cache(adapter);
952
953         tasklet_kill(&adapter->dpc_h);
954
955         megaraid_sysfs_free_resources(adapter);
956
957         megaraid_free_cmd_packets(adapter);
958
959         free_irq(adapter->irq, adapter);
960
961         iounmap(raid_dev->baseaddr);
962
963         pci_release_regions(adapter->pdev);
964
965         kfree(raid_dev);
966
967         return;
968 }
969
970
971 /**
972  * megaraid_alloc_cmd_packets - allocate shared mailbox
973  * @adapter             : soft state of the raid controller
974  *
975  * Allocate and align the shared mailbox. This maibox is used to issue
976  * all the commands. For IO based controllers, the mailbox is also regsitered
977  * with the FW. Allocate memory for all commands as well.
978  * This is our big allocator.
979  */
980 static int
981 megaraid_alloc_cmd_packets(adapter_t *adapter)
982 {
983         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
984         struct pci_dev          *pdev;
985         unsigned long           align;
986         scb_t                   *scb;
987         mbox_ccb_t              *ccb;
988         struct mraid_pci_blk    *epthru_pci_blk;
989         struct mraid_pci_blk    *sg_pci_blk;
990         struct mraid_pci_blk    *mbox_pci_blk;
991         int                     i;
992
993         pdev = adapter->pdev;
994
995         /*
996          * Setup the mailbox
997          * Allocate the common 16-byte aligned memory for the handshake
998          * mailbox.
999          */
1000         raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
1001                         sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
1002
1003         if (!raid_dev->una_mbox64) {
1004                 con_log(CL_ANN, (KERN_WARNING
1005                         "megaraid: out of memory, %s %d\n", __func__,
1006                         __LINE__));
1007                 return -1;
1008         }
1009         memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
1010
1011         /*
1012          * Align the mailbox at 16-byte boundary
1013          */
1014         raid_dev->mbox  = &raid_dev->una_mbox64->mbox32;
1015
1016         raid_dev->mbox  = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
1017                                 (~0UL ^ 0xFUL));
1018
1019         raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
1020
1021         align = ((void *)raid_dev->mbox -
1022                         ((void *)&raid_dev->una_mbox64->mbox32));
1023
1024         raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1025                         align;
1026
1027         // Allocate memory for commands issued internally
1028         adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
1029                                 &adapter->ibuf_dma_h);
1030         if (!adapter->ibuf) {
1031
1032                 con_log(CL_ANN, (KERN_WARNING
1033                         "megaraid: out of memory, %s %d\n", __func__,
1034                         __LINE__));
1035
1036                 goto out_free_common_mbox;
1037         }
1038         memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
1039
1040         // Allocate memory for our SCSI Command Blocks and their associated
1041         // memory
1042
1043         /*
1044          * Allocate memory for the base list of scb. Later allocate memory for
1045          * CCBs and embedded components of each CCB and point the pointers in
1046          * scb to the allocated components
1047          * NOTE: The code to allocate SCB will be duplicated in all the LLD
1048          * since the calling routine does not yet know the number of available
1049          * commands.
1050          */
1051         adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL);
1052
1053         if (adapter->kscb_list == NULL) {
1054                 con_log(CL_ANN, (KERN_WARNING
1055                         "megaraid: out of memory, %s %d\n", __func__,
1056                         __LINE__));
1057                 goto out_free_ibuf;
1058         }
1059
1060         // memory allocation for our command packets
1061         if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1062                 con_log(CL_ANN, (KERN_WARNING
1063                         "megaraid: out of memory, %s %d\n", __func__,
1064                         __LINE__));
1065                 goto out_free_scb_list;
1066         }
1067
1068         // Adjust the scb pointers and link in the free pool
1069         epthru_pci_blk  = raid_dev->epthru_pool;
1070         sg_pci_blk      = raid_dev->sg_pool;
1071         mbox_pci_blk    = raid_dev->mbox_pool;
1072
1073         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1074                 scb                     = adapter->kscb_list + i;
1075                 ccb                     = raid_dev->ccb_list + i;
1076
1077                 ccb->mbox       = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1078                 ccb->raw_mbox   = (uint8_t *)ccb->mbox;
1079                 ccb->mbox64     = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1080                 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1081
1082                 // make sure the mailbox is aligned properly
1083                 if (ccb->mbox_dma_h & 0x0F) {
1084                         con_log(CL_ANN, (KERN_CRIT
1085                                 "megaraid mbox: not aligned on 16-bytes\n"));
1086
1087                         goto out_teardown_dma_pools;
1088                 }
1089
1090                 ccb->epthru             = (mraid_epassthru_t *)
1091                                                 epthru_pci_blk[i].vaddr;
1092                 ccb->epthru_dma_h       = epthru_pci_blk[i].dma_addr;
1093                 ccb->pthru              = (mraid_passthru_t *)ccb->epthru;
1094                 ccb->pthru_dma_h        = ccb->epthru_dma_h;
1095
1096
1097                 ccb->sgl64              = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1098                 ccb->sgl_dma_h          = sg_pci_blk[i].dma_addr;
1099                 ccb->sgl32              = (mbox_sgl32 *)ccb->sgl64;
1100
1101                 scb->ccb                = (caddr_t)ccb;
1102                 scb->gp                 = 0;
1103
1104                 scb->sno                = i;    // command index
1105
1106                 scb->scp                = NULL;
1107                 scb->state              = SCB_FREE;
1108                 scb->dma_direction      = PCI_DMA_NONE;
1109                 scb->dma_type           = MRAID_DMA_NONE;
1110                 scb->dev_channel        = -1;
1111                 scb->dev_target         = -1;
1112
1113                 // put scb in the free pool
1114                 list_add_tail(&scb->list, &adapter->kscb_pool);
1115         }
1116
1117         return 0;
1118
1119 out_teardown_dma_pools:
1120         megaraid_mbox_teardown_dma_pools(adapter);
1121 out_free_scb_list:
1122         kfree(adapter->kscb_list);
1123 out_free_ibuf:
1124         pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1125                 adapter->ibuf_dma_h);
1126 out_free_common_mbox:
1127         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1128                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1129
1130         return -1;
1131 }
1132
1133
1134 /**
1135  * megaraid_free_cmd_packets - free memory
1136  * @adapter             : soft state of the raid controller
1137  *
1138  * Release memory resources allocated for commands.
1139  */
1140 static void
1141 megaraid_free_cmd_packets(adapter_t *adapter)
1142 {
1143         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1144
1145         megaraid_mbox_teardown_dma_pools(adapter);
1146
1147         kfree(adapter->kscb_list);
1148
1149         pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1150                 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1151
1152         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1153                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1154         return;
1155 }
1156
1157
1158 /**
1159  * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1160  * @adapter             : HBA soft state
1161  *
1162  * Setup the dma pools for mailbox, passthru and extended passthru structures,
1163  * and scatter-gather lists.
1164  */
1165 static int
1166 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1167 {
1168         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1169         struct mraid_pci_blk    *epthru_pci_blk;
1170         struct mraid_pci_blk    *sg_pci_blk;
1171         struct mraid_pci_blk    *mbox_pci_blk;
1172         int                     i;
1173
1174
1175
1176         // Allocate memory for 16-bytes aligned mailboxes
1177         raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1178                                                 adapter->pdev,
1179                                                 sizeof(mbox64_t) + 16,
1180                                                 16, 0);
1181
1182         if (raid_dev->mbox_pool_handle == NULL) {
1183                 goto fail_setup_dma_pool;
1184         }
1185
1186         mbox_pci_blk = raid_dev->mbox_pool;
1187         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1188                 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1189                                                 raid_dev->mbox_pool_handle,
1190                                                 GFP_KERNEL,
1191                                                 &mbox_pci_blk[i].dma_addr);
1192                 if (!mbox_pci_blk[i].vaddr) {
1193                         goto fail_setup_dma_pool;
1194                 }
1195         }
1196
1197         /*
1198          * Allocate memory for each embedded passthru strucuture pointer
1199          * Request for a 128 bytes aligned structure for each passthru command
1200          * structure
1201          * Since passthru and extended passthru commands are exclusive, they
1202          * share common memory pool. Passthru structures piggyback on memory
1203          * allocted to extended passthru since passthru is smaller of the two
1204          */
1205         raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1206                         adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1207
1208         if (raid_dev->epthru_pool_handle == NULL) {
1209                 goto fail_setup_dma_pool;
1210         }
1211
1212         epthru_pci_blk = raid_dev->epthru_pool;
1213         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1214                 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1215                                                 raid_dev->epthru_pool_handle,
1216                                                 GFP_KERNEL,
1217                                                 &epthru_pci_blk[i].dma_addr);
1218                 if (!epthru_pci_blk[i].vaddr) {
1219                         goto fail_setup_dma_pool;
1220                 }
1221         }
1222
1223
1224         // Allocate memory for each scatter-gather list. Request for 512 bytes
1225         // alignment for each sg list
1226         raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1227                                         adapter->pdev,
1228                                         sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1229                                         512, 0);
1230
1231         if (raid_dev->sg_pool_handle == NULL) {
1232                 goto fail_setup_dma_pool;
1233         }
1234
1235         sg_pci_blk = raid_dev->sg_pool;
1236         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1237                 sg_pci_blk[i].vaddr = pci_pool_alloc(
1238                                                 raid_dev->sg_pool_handle,
1239                                                 GFP_KERNEL,
1240                                                 &sg_pci_blk[i].dma_addr);
1241                 if (!sg_pci_blk[i].vaddr) {
1242                         goto fail_setup_dma_pool;
1243                 }
1244         }
1245
1246         return 0;
1247
1248 fail_setup_dma_pool:
1249         megaraid_mbox_teardown_dma_pools(adapter);
1250         return -1;
1251 }
1252
1253
1254 /**
1255  * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1256  * @adapter             : HBA soft state
1257  *
1258  * Teardown the dma pool for mailbox, passthru and extended passthru
1259  * structures, and scatter-gather lists.
1260  */
1261 static void
1262 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1263 {
1264         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1265         struct mraid_pci_blk    *epthru_pci_blk;
1266         struct mraid_pci_blk    *sg_pci_blk;
1267         struct mraid_pci_blk    *mbox_pci_blk;
1268         int                     i;
1269
1270
1271         sg_pci_blk = raid_dev->sg_pool;
1272         for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1273                 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1274                         sg_pci_blk[i].dma_addr);
1275         }
1276         if (raid_dev->sg_pool_handle)
1277                 pci_pool_destroy(raid_dev->sg_pool_handle);
1278
1279
1280         epthru_pci_blk = raid_dev->epthru_pool;
1281         for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1282                 pci_pool_free(raid_dev->epthru_pool_handle,
1283                         epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1284         }
1285         if (raid_dev->epthru_pool_handle)
1286                 pci_pool_destroy(raid_dev->epthru_pool_handle);
1287
1288
1289         mbox_pci_blk = raid_dev->mbox_pool;
1290         for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1291                 pci_pool_free(raid_dev->mbox_pool_handle,
1292                         mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1293         }
1294         if (raid_dev->mbox_pool_handle)
1295                 pci_pool_destroy(raid_dev->mbox_pool_handle);
1296
1297         return;
1298 }
1299
1300
1301 /**
1302  * megaraid_alloc_scb - detach and return a scb from the free list
1303  * @adapter     : controller's soft state
1304  * @scp         : pointer to the scsi command to be executed
1305  *
1306  * Return the scb from the head of the free list. %NULL if there are none
1307  * available.
1308  */
1309 static scb_t *
1310 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1311 {
1312         struct list_head        *head = &adapter->kscb_pool;
1313         scb_t                   *scb = NULL;
1314         unsigned long           flags;
1315
1316         // detach scb from free pool
1317         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1318
1319         if (list_empty(head)) {
1320                 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1321                 return NULL;
1322         }
1323
1324         scb = list_entry(head->next, scb_t, list);
1325         list_del_init(&scb->list);
1326
1327         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1328
1329         scb->state      = SCB_ACTIVE;
1330         scb->scp        = scp;
1331         scb->dma_type   = MRAID_DMA_NONE;
1332
1333         return scb;
1334 }
1335
1336
1337 /**
1338  * megaraid_dealloc_scb - return the scb to the free pool
1339  * @adapter     : controller's soft state
1340  * @scb         : scb to be freed
1341  *
1342  * Return the scb back to the free list of scbs. The caller must 'flush' the
1343  * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1344  * NOTE NOTE: Make sure the scb is not on any list before calling this
1345  * routine.
1346  */
1347 static inline void
1348 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1349 {
1350         unsigned long           flags;
1351
1352         // put scb in the free pool
1353         scb->state      = SCB_FREE;
1354         scb->scp        = NULL;
1355         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1356
1357         list_add(&scb->list, &adapter->kscb_pool);
1358
1359         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1360
1361         return;
1362 }
1363
1364
1365 /**
1366  * megaraid_mbox_mksgl - make the scatter-gather list
1367  * @adapter     : controller's soft state
1368  * @scb         : scsi control block
1369  *
1370  * Prepare the scatter-gather list.
1371  */
1372 static int
1373 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1374 {
1375         struct scatterlist      *sgl;
1376         mbox_ccb_t              *ccb;
1377         struct scsi_cmnd        *scp;
1378         int                     sgcnt;
1379         int                     i;
1380
1381
1382         scp     = scb->scp;
1383         ccb     = (mbox_ccb_t *)scb->ccb;
1384
1385         sgcnt = scsi_dma_map(scp);
1386         BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen);
1387
1388         // no mapping required if no data to be transferred
1389         if (!sgcnt)
1390                 return 0;
1391
1392         scb->dma_type = MRAID_DMA_WSG;
1393
1394         scsi_for_each_sg(scp, sgl, sgcnt, i) {
1395                 ccb->sgl64[i].address   = sg_dma_address(sgl);
1396                 ccb->sgl64[i].length    = sg_dma_len(sgl);
1397         }
1398
1399         // Return count of SG nodes
1400         return sgcnt;
1401 }
1402
1403
1404 /**
1405  * mbox_post_cmd - issue a mailbox command
1406  * @adapter     : controller's soft state
1407  * @scb         : command to be issued
1408  *
1409  * Post the command to the controller if mailbox is available.
1410  */
1411 static int
1412 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1413 {
1414         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
1415         mbox64_t        *mbox64;
1416         mbox_t          *mbox;
1417         mbox_ccb_t      *ccb;
1418         unsigned long   flags;
1419         unsigned int    i = 0;
1420
1421
1422         ccb     = (mbox_ccb_t *)scb->ccb;
1423         mbox    = raid_dev->mbox;
1424         mbox64  = raid_dev->mbox64;
1425
1426         /*
1427          * Check for busy mailbox. If it is, return failure - the caller
1428          * should retry later.
1429          */
1430         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1431
1432         if (unlikely(mbox->busy)) {
1433                 do {
1434                         udelay(1);
1435                         i++;
1436                         rmb();
1437                 } while(mbox->busy && (i < max_mbox_busy_wait));
1438
1439                 if (mbox->busy) {
1440
1441                         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1442
1443                         return -1;
1444                 }
1445         }
1446
1447
1448         // Copy this command's mailbox data into "adapter's" mailbox
1449         memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1450         mbox->cmdid = scb->sno;
1451
1452         adapter->outstanding_cmds++;
1453
1454         if (scb->dma_direction == PCI_DMA_TODEVICE)
1455                 pci_dma_sync_sg_for_device(adapter->pdev,
1456                                            scsi_sglist(scb->scp),
1457                                            scsi_sg_count(scb->scp),
1458                                            PCI_DMA_TODEVICE);
1459
1460         mbox->busy      = 1;    // Set busy
1461         mbox->poll      = 0;
1462         mbox->ack       = 0;
1463         wmb();
1464
1465         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1466
1467         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1468
1469         return 0;
1470 }
1471
1472
1473 /**
1474  * megaraid_queue_command - generic queue entry point for all LLDs
1475  * @scp         : pointer to the scsi command to be executed
1476  * @done        : callback routine to be called after the cmd has be completed
1477  *
1478  * Queue entry point for mailbox based controllers.
1479  */
1480 static int
1481 megaraid_queue_command(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *))
1482 {
1483         adapter_t       *adapter;
1484         scb_t           *scb;
1485         int             if_busy;
1486
1487         adapter         = SCP2ADAPTER(scp);
1488         scp->scsi_done  = done;
1489         scp->result     = 0;
1490
1491         /*
1492          * Allocate and build a SCB request
1493          * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1494          * not allocate scb. We will return non-zero status in that case.
1495          * NOTE: scb can be null even though certain commands completed
1496          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1497          * return 0 in that case, and we would do the callback right away.
1498          */
1499         if_busy = 0;
1500         scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1501         if (!scb) {     // command already completed
1502                 done(scp);
1503                 return 0;
1504         }
1505
1506         megaraid_mbox_runpendq(adapter, scb);
1507         return if_busy;
1508 }
1509
1510 /**
1511  * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
1512  * @adapter     : controller's soft state
1513  * @scp         : mid-layer scsi command pointer
1514  * @busy        : set if request could not be completed because of lack of
1515  *              resources
1516  *
1517  * Transform the mid-layer scsi command to megaraid firmware lingua.
1518  * Convert the command issued by mid-layer to format understood by megaraid
1519  * firmware. We also complete certain commands without sending them to firmware.
1520  */
1521 static scb_t *
1522 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1523 {
1524         mraid_device_t          *rdev = ADAP2RAIDDEV(adapter);
1525         int                     channel;
1526         int                     target;
1527         int                     islogical;
1528         mbox_ccb_t              *ccb;
1529         mraid_passthru_t        *pthru;
1530         mbox64_t                *mbox64;
1531         mbox_t                  *mbox;
1532         scb_t                   *scb;
1533         char                    skip[] = "skipping";
1534         char                    scan[] = "scanning";
1535         char                    *ss;
1536
1537
1538         /*
1539          * Get the appropriate device map for the device this command is
1540          * intended for
1541          */
1542         MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1543
1544         /*
1545          * Logical drive commands
1546          */
1547         if (islogical) {
1548                 switch (scp->cmnd[0]) {
1549                 case TEST_UNIT_READY:
1550                         /*
1551                          * Do we support clustering and is the support enabled
1552                          * If no, return success always
1553                          */
1554                         if (!adapter->ha) {
1555                                 scp->result = (DID_OK << 16);
1556                                 return NULL;
1557                         }
1558
1559                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1560                                 scp->result = (DID_ERROR << 16);
1561                                 *busy = 1;
1562                                 return NULL;
1563                         }
1564
1565                         scb->dma_direction      = scp->sc_data_direction;
1566                         scb->dev_channel        = 0xFF;
1567                         scb->dev_target         = target;
1568                         ccb                     = (mbox_ccb_t *)scb->ccb;
1569
1570                         /*
1571                          * The command id will be provided by the command
1572                          * issuance routine
1573                          */
1574                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1575                         ccb->raw_mbox[2]        = RESERVATION_STATUS;
1576                         ccb->raw_mbox[3]        = target;
1577
1578                         return scb;
1579
1580                 case MODE_SENSE:
1581                 {
1582                         struct scatterlist      *sgl;
1583                         caddr_t                 vaddr;
1584
1585                         sgl = scsi_sglist(scp);
1586                         if (sg_page(sgl)) {
1587                                 vaddr = (caddr_t) sg_virt(&sgl[0]);
1588
1589                                 memset(vaddr, 0, scp->cmnd[4]);
1590                         }
1591                         else {
1592                                 con_log(CL_ANN, (KERN_WARNING
1593                                                  "megaraid mailbox: invalid sg:%d\n",
1594                                                  __LINE__));
1595                         }
1596                 }
1597                 scp->result = (DID_OK << 16);
1598                 return NULL;
1599
1600                 case INQUIRY:
1601                         /*
1602                          * Display the channel scan for logical drives
1603                          * Do not display scan for a channel if already done.
1604                          */
1605                         if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1606
1607                                 con_log(CL_ANN, (KERN_INFO
1608                                         "scsi[%d]: scanning scsi channel %d",
1609                                         adapter->host->host_no,
1610                                         SCP2CHANNEL(scp)));
1611
1612                                 con_log(CL_ANN, (
1613                                         " [virtual] for logical drives\n"));
1614
1615                                 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1616                         }
1617
1618                         if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1619                                 scp->sense_buffer[0] = 0x70;
1620                                 scp->sense_buffer[2] = ILLEGAL_REQUEST;
1621                                 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB;
1622                                 scp->result = CHECK_CONDITION << 1;
1623                                 return NULL;
1624                         }
1625
1626                         /* Fall through */
1627
1628                 case READ_CAPACITY:
1629                         /*
1630                          * Do not allow LUN > 0 for logical drives and
1631                          * requests for more than 40 logical drives
1632                          */
1633                         if (SCP2LUN(scp)) {
1634                                 scp->result = (DID_BAD_TARGET << 16);
1635                                 return NULL;
1636                         }
1637                         if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1638                                 scp->result = (DID_BAD_TARGET << 16);
1639                                 return NULL;
1640                         }
1641
1642
1643                         /* Allocate a SCB and initialize passthru */
1644                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1645                                 scp->result = (DID_ERROR << 16);
1646                                 *busy = 1;
1647                                 return NULL;
1648                         }
1649
1650                         ccb                     = (mbox_ccb_t *)scb->ccb;
1651                         scb->dev_channel        = 0xFF;
1652                         scb->dev_target         = target;
1653                         pthru                   = ccb->pthru;
1654                         mbox                    = ccb->mbox;
1655                         mbox64                  = ccb->mbox64;
1656
1657                         pthru->timeout          = 0;
1658                         pthru->ars              = 1;
1659                         pthru->reqsenselen      = 14;
1660                         pthru->islogical        = 1;
1661                         pthru->logdrv           = target;
1662                         pthru->cdblen           = scp->cmd_len;
1663                         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1664
1665                         mbox->cmd               = MBOXCMD_PASSTHRU64;
1666                         scb->dma_direction      = scp->sc_data_direction;
1667
1668                         pthru->dataxferlen      = scsi_bufflen(scp);
1669                         pthru->dataxferaddr     = ccb->sgl_dma_h;
1670                         pthru->numsge           = megaraid_mbox_mksgl(adapter,
1671                                                         scb);
1672
1673                         mbox->xferaddr          = 0xFFFFFFFF;
1674                         mbox64->xferaddr_lo     = (uint32_t )ccb->pthru_dma_h;
1675                         mbox64->xferaddr_hi     = 0;
1676
1677                         return scb;
1678
1679                 case READ_6:
1680                 case WRITE_6:
1681                 case READ_10:
1682                 case WRITE_10:
1683                 case READ_12:
1684                 case WRITE_12:
1685
1686                         /*
1687                          * Allocate a SCB and initialize mailbox
1688                          */
1689                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1690                                 scp->result = (DID_ERROR << 16);
1691                                 *busy = 1;
1692                                 return NULL;
1693                         }
1694                         ccb                     = (mbox_ccb_t *)scb->ccb;
1695                         scb->dev_channel        = 0xFF;
1696                         scb->dev_target         = target;
1697                         mbox                    = ccb->mbox;
1698                         mbox64                  = ccb->mbox64;
1699                         mbox->logdrv            = target;
1700
1701                         /*
1702                          * A little HACK: 2nd bit is zero for all scsi read
1703                          * commands and is set for all scsi write commands
1704                          */
1705                         mbox->cmd = (scp->cmnd[0] & 0x02) ?  MBOXCMD_LWRITE64:
1706                                         MBOXCMD_LREAD64 ;
1707
1708                         /*
1709                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1710                          */
1711                         if (scp->cmd_len == 6) {
1712                                 mbox->numsectors = (uint32_t)scp->cmnd[4];
1713                                 mbox->lba =
1714                                         ((uint32_t)scp->cmnd[1] << 16)  |
1715                                         ((uint32_t)scp->cmnd[2] << 8)   |
1716                                         (uint32_t)scp->cmnd[3];
1717
1718                                 mbox->lba &= 0x1FFFFF;
1719                         }
1720
1721                         /*
1722                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1723                          */
1724                         else if (scp->cmd_len == 10) {
1725                                 mbox->numsectors =
1726                                         (uint32_t)scp->cmnd[8] |
1727                                         ((uint32_t)scp->cmnd[7] << 8);
1728                                 mbox->lba =
1729                                         ((uint32_t)scp->cmnd[2] << 24) |
1730                                         ((uint32_t)scp->cmnd[3] << 16) |
1731                                         ((uint32_t)scp->cmnd[4] << 8) |
1732                                         (uint32_t)scp->cmnd[5];
1733                         }
1734
1735                         /*
1736                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1737                          */
1738                         else if (scp->cmd_len == 12) {
1739                                 mbox->lba =
1740                                         ((uint32_t)scp->cmnd[2] << 24) |
1741                                         ((uint32_t)scp->cmnd[3] << 16) |
1742                                         ((uint32_t)scp->cmnd[4] << 8) |
1743                                         (uint32_t)scp->cmnd[5];
1744
1745                                 mbox->numsectors =
1746                                         ((uint32_t)scp->cmnd[6] << 24) |
1747                                         ((uint32_t)scp->cmnd[7] << 16) |
1748                                         ((uint32_t)scp->cmnd[8] << 8) |
1749                                         (uint32_t)scp->cmnd[9];
1750                         }
1751                         else {
1752                                 con_log(CL_ANN, (KERN_WARNING
1753                                         "megaraid: unsupported CDB length\n"));
1754
1755                                 megaraid_dealloc_scb(adapter, scb);
1756
1757                                 scp->result = (DID_ERROR << 16);
1758                                 return NULL;
1759                         }
1760
1761                         scb->dma_direction = scp->sc_data_direction;
1762
1763                         // Calculate Scatter-Gather info
1764                         mbox64->xferaddr_lo     = (uint32_t )ccb->sgl_dma_h;
1765                         mbox->numsge            = megaraid_mbox_mksgl(adapter,
1766                                                         scb);
1767                         mbox->xferaddr          = 0xFFFFFFFF;
1768                         mbox64->xferaddr_hi     = 0;
1769
1770                         return scb;
1771
1772                 case RESERVE:
1773                 case RELEASE:
1774                         /*
1775                          * Do we support clustering and is the support enabled
1776                          */
1777                         if (!adapter->ha) {
1778                                 scp->result = (DID_BAD_TARGET << 16);
1779                                 return NULL;
1780                         }
1781
1782                         /*
1783                          * Allocate a SCB and initialize mailbox
1784                          */
1785                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1786                                 scp->result = (DID_ERROR << 16);
1787                                 *busy = 1;
1788                                 return NULL;
1789                         }
1790
1791                         ccb                     = (mbox_ccb_t *)scb->ccb;
1792                         scb->dev_channel        = 0xFF;
1793                         scb->dev_target         = target;
1794                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1795                         ccb->raw_mbox[2]        =  (scp->cmnd[0] == RESERVE) ?
1796                                                 RESERVE_LD : RELEASE_LD;
1797
1798                         ccb->raw_mbox[3]        = target;
1799                         scb->dma_direction      = scp->sc_data_direction;
1800
1801                         return scb;
1802
1803                 default:
1804                         scp->result = (DID_BAD_TARGET << 16);
1805                         return NULL;
1806                 }
1807         }
1808         else { // Passthru device commands
1809
1810                 // Do not allow access to target id > 15 or LUN > 7
1811                 if (target > 15 || SCP2LUN(scp) > 7) {
1812                         scp->result = (DID_BAD_TARGET << 16);
1813                         return NULL;
1814                 }
1815
1816                 // if fast load option was set and scan for last device is
1817                 // over, reset the fast_load flag so that during a possible
1818                 // next scan, devices can be made available
1819                 if (rdev->fast_load && (target == 15) &&
1820                         (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1821
1822                         con_log(CL_ANN, (KERN_INFO
1823                         "megaraid[%d]: physical device scan re-enabled\n",
1824                                 adapter->host->host_no));
1825                         rdev->fast_load = 0;
1826                 }
1827
1828                 /*
1829                  * Display the channel scan for physical devices
1830                  */
1831                 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1832
1833                         ss = rdev->fast_load ? skip : scan;
1834
1835                         con_log(CL_ANN, (KERN_INFO
1836                                 "scsi[%d]: %s scsi channel %d [Phy %d]",
1837                                 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1838                                 channel));
1839
1840                         con_log(CL_ANN, (
1841                                 " for non-raid devices\n"));
1842
1843                         rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1844                 }
1845
1846                 // disable channel sweep if fast load option given
1847                 if (rdev->fast_load) {
1848                         scp->result = (DID_BAD_TARGET << 16);
1849                         return NULL;
1850                 }
1851
1852                 // Allocate a SCB and initialize passthru
1853                 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1854                         scp->result = (DID_ERROR << 16);
1855                         *busy = 1;
1856                         return NULL;
1857                 }
1858
1859                 ccb                     = (mbox_ccb_t *)scb->ccb;
1860                 scb->dev_channel        = channel;
1861                 scb->dev_target         = target;
1862                 scb->dma_direction      = scp->sc_data_direction;
1863                 mbox                    = ccb->mbox;
1864                 mbox64                  = ccb->mbox64;
1865
1866                 // Does this firmware support extended CDBs
1867                 if (adapter->max_cdb_sz == 16) {
1868                         mbox->cmd               = MBOXCMD_EXTPTHRU;
1869
1870                         megaraid_mbox_prepare_epthru(adapter, scb, scp);
1871
1872                         mbox64->xferaddr_lo     = (uint32_t)ccb->epthru_dma_h;
1873                         mbox64->xferaddr_hi     = 0;
1874                         mbox->xferaddr          = 0xFFFFFFFF;
1875                 }
1876                 else {
1877                         mbox->cmd = MBOXCMD_PASSTHRU64;
1878
1879                         megaraid_mbox_prepare_pthru(adapter, scb, scp);
1880
1881                         mbox64->xferaddr_lo     = (uint32_t)ccb->pthru_dma_h;
1882                         mbox64->xferaddr_hi     = 0;
1883                         mbox->xferaddr          = 0xFFFFFFFF;
1884                 }
1885                 return scb;
1886         }
1887
1888         // NOT REACHED
1889 }
1890
1891
1892 /**
1893  * megaraid_mbox_runpendq - execute commands queued in the pending queue
1894  * @adapter     : controller's soft state
1895  * @scb_q       : SCB to be queued in the pending list
1896  *
1897  * Scan the pending list for commands which are not yet issued and try to
1898  * post to the controller. The SCB can be a null pointer, which would indicate
1899  * no SCB to be queue, just try to execute the ones in the pending list.
1900  *
1901  * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1902  * out from the head of the pending list. If it is successfully issued, the
1903  * next SCB is at the head now.
1904  */
1905 static void
1906 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1907 {
1908         scb_t                   *scb;
1909         unsigned long           flags;
1910
1911         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1912
1913         if (scb_q) {
1914                 scb_q->state = SCB_PENDQ;
1915                 list_add_tail(&scb_q->list, &adapter->pend_list);
1916         }
1917
1918         // if the adapter in not in quiescent mode, post the commands to FW
1919         if (adapter->quiescent) {
1920                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1921                 return;
1922         }
1923
1924         while (!list_empty(&adapter->pend_list)) {
1925
1926                 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1927
1928                 scb = list_entry(adapter->pend_list.next, scb_t, list);
1929
1930                 // remove the scb from the pending list and try to
1931                 // issue. If we are unable to issue it, put back in
1932                 // the pending list and return
1933
1934                 list_del_init(&scb->list);
1935
1936                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1937
1938                 // if mailbox was busy, return SCB back to pending
1939                 // list. Make sure to add at the head, since that's
1940                 // where it would have been removed from
1941
1942                 scb->state = SCB_ISSUED;
1943
1944                 if (mbox_post_cmd(adapter, scb) != 0) {
1945
1946                         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1947
1948                         scb->state = SCB_PENDQ;
1949
1950                         list_add(&scb->list, &adapter->pend_list);
1951
1952                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1953                                 flags);
1954
1955                         return;
1956                 }
1957
1958                 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1959         }
1960
1961         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1962
1963
1964         return;
1965 }
1966
1967
1968 /**
1969  * megaraid_mbox_prepare_pthru - prepare a command for physical devices
1970  * @adapter     : pointer to controller's soft state
1971  * @scb         : scsi control block
1972  * @scp         : scsi command from the mid-layer
1973  *
1974  * Prepare a command for the scsi physical devices.
1975  */
1976 static void
1977 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1978                 struct scsi_cmnd *scp)
1979 {
1980         mbox_ccb_t              *ccb;
1981         mraid_passthru_t        *pthru;
1982         uint8_t                 channel;
1983         uint8_t                 target;
1984
1985         ccb     = (mbox_ccb_t *)scb->ccb;
1986         pthru   = ccb->pthru;
1987         channel = scb->dev_channel;
1988         target  = scb->dev_target;
1989
1990         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1991         pthru->timeout          = 4;    
1992         pthru->ars              = 1;
1993         pthru->islogical        = 0;
1994         pthru->channel          = 0;
1995         pthru->target           = (channel << 4) | target;
1996         pthru->logdrv           = SCP2LUN(scp);
1997         pthru->reqsenselen      = 14;
1998         pthru->cdblen           = scp->cmd_len;
1999
2000         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2001
2002         if (scsi_bufflen(scp)) {
2003                 pthru->dataxferlen      = scsi_bufflen(scp);
2004                 pthru->dataxferaddr     = ccb->sgl_dma_h;
2005                 pthru->numsge           = megaraid_mbox_mksgl(adapter, scb);
2006         }
2007         else {
2008                 pthru->dataxferaddr     = 0;
2009                 pthru->dataxferlen      = 0;
2010                 pthru->numsge           = 0;
2011         }
2012         return;
2013 }
2014
2015
2016 /**
2017  * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2018  * @adapter     : pointer to controller's soft state
2019  * @scb         : scsi control block
2020  * @scp         : scsi command from the mid-layer
2021  *
2022  * Prepare a command for the scsi physical devices. This rountine prepares
2023  * commands for devices which can take extended CDBs (>10 bytes).
2024  */
2025 static void
2026 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2027                 struct scsi_cmnd *scp)
2028 {
2029         mbox_ccb_t              *ccb;
2030         mraid_epassthru_t       *epthru;
2031         uint8_t                 channel;
2032         uint8_t                 target;
2033
2034         ccb     = (mbox_ccb_t *)scb->ccb;
2035         epthru  = ccb->epthru;
2036         channel = scb->dev_channel;
2037         target  = scb->dev_target;
2038
2039         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2040         epthru->timeout         = 4;    
2041         epthru->ars             = 1;
2042         epthru->islogical       = 0;
2043         epthru->channel         = 0;
2044         epthru->target          = (channel << 4) | target;
2045         epthru->logdrv          = SCP2LUN(scp);
2046         epthru->reqsenselen     = 14;
2047         epthru->cdblen          = scp->cmd_len;
2048
2049         memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2050
2051         if (scsi_bufflen(scp)) {
2052                 epthru->dataxferlen     = scsi_bufflen(scp);
2053                 epthru->dataxferaddr    = ccb->sgl_dma_h;
2054                 epthru->numsge          = megaraid_mbox_mksgl(adapter, scb);
2055         }
2056         else {
2057                 epthru->dataxferaddr    = 0;
2058                 epthru->dataxferlen     = 0;
2059                 epthru->numsge          = 0;
2060         }
2061         return;
2062 }
2063
2064
2065 /**
2066  * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2067  * @adapter     : controller's soft state
2068  *
2069  * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
2070  * completed command and put them on the completed list for later processing.
2071  *
2072  * Returns:     1 if the interrupt is valid, 0 otherwise
2073  */
2074 static int
2075 megaraid_ack_sequence(adapter_t *adapter)
2076 {
2077         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2078         mbox_t                  *mbox;
2079         scb_t                   *scb;
2080         uint8_t                 nstatus;
2081         uint8_t                 completed[MBOX_MAX_FIRMWARE_STATUS];
2082         struct list_head        clist;
2083         int                     handled;
2084         uint32_t                dword;
2085         unsigned long           flags;
2086         int                     i, j;
2087
2088
2089         mbox    = raid_dev->mbox;
2090
2091         // move the SCBs from the firmware completed array to our local list
2092         INIT_LIST_HEAD(&clist);
2093
2094         // loop till F/W has more commands for us to complete
2095         handled = 0;
2096         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2097         do {
2098                 /*
2099                  * Check if a valid interrupt is pending. If found, force the
2100                  * interrupt line low.
2101                  */
2102                 dword = RDOUTDOOR(raid_dev);
2103                 if (dword != 0x10001234) break;
2104
2105                 handled = 1;
2106
2107                 WROUTDOOR(raid_dev, 0x10001234);
2108
2109                 nstatus = 0;
2110                 // wait for valid numstatus to post
2111                 for (i = 0; i < 0xFFFFF; i++) {
2112                         if (mbox->numstatus != 0xFF) {
2113                                 nstatus = mbox->numstatus;
2114                                 break;
2115                         }
2116                         rmb();
2117                 }
2118                 mbox->numstatus = 0xFF;
2119
2120                 adapter->outstanding_cmds -= nstatus;
2121
2122                 for (i = 0; i < nstatus; i++) {
2123
2124                         // wait for valid command index to post
2125                         for (j = 0; j < 0xFFFFF; j++) {
2126                                 if (mbox->completed[i] != 0xFF) break;
2127                                 rmb();
2128                         }
2129                         completed[i]            = mbox->completed[i];
2130                         mbox->completed[i]      = 0xFF;
2131
2132                         if (completed[i] == 0xFF) {
2133                                 con_log(CL_ANN, (KERN_CRIT
2134                                 "megaraid: command posting timed out\n"));
2135
2136                                 BUG();
2137                                 continue;
2138                         }
2139
2140                         // Get SCB associated with this command id
2141                         if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2142                                 // a cmm command
2143                                 scb = adapter->uscb_list + (completed[i] -
2144                                                 MBOX_MAX_SCSI_CMDS);
2145                         }
2146                         else {
2147                                 // an os command
2148                                 scb = adapter->kscb_list + completed[i];
2149                         }
2150
2151                         scb->status = mbox->status;
2152                         list_add_tail(&scb->list, &clist);
2153                 }
2154
2155                 // Acknowledge interrupt
2156                 WRINDOOR(raid_dev, 0x02);
2157
2158         } while(1);
2159
2160         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2161
2162
2163         // put the completed commands in the completed list. DPC would
2164         // complete these commands later
2165         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2166
2167         list_splice(&clist, &adapter->completed_list);
2168
2169         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2170
2171
2172         // schedule the DPC if there is some work for it
2173         if (handled)
2174                 tasklet_schedule(&adapter->dpc_h);
2175
2176         return handled;
2177 }
2178
2179
2180 /**
2181  * megaraid_isr - isr for memory based mailbox based controllers
2182  * @irq         : irq
2183  * @devp        : pointer to our soft state
2184  *
2185  * Interrupt service routine for memory-mapped mailbox controllers.
2186  */
2187 static irqreturn_t
2188 megaraid_isr(int irq, void *devp)
2189 {
2190         adapter_t       *adapter = devp;
2191         int             handled;
2192
2193         handled = megaraid_ack_sequence(adapter);
2194
2195         /* Loop through any pending requests */
2196         if (!adapter->quiescent) {
2197                 megaraid_mbox_runpendq(adapter, NULL);
2198         }
2199
2200         return IRQ_RETVAL(handled);
2201 }
2202
2203
2204 /**
2205  * megaraid_mbox_sync_scb - sync kernel buffers
2206  * @adapter     : controller's soft state
2207  * @scb         : pointer to the resource packet
2208  *
2209  * DMA sync if required.
2210  */
2211 static void
2212 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2213 {
2214         mbox_ccb_t      *ccb;
2215
2216         ccb     = (mbox_ccb_t *)scb->ccb;
2217
2218         if (scb->dma_direction == PCI_DMA_FROMDEVICE)
2219                 pci_dma_sync_sg_for_cpu(adapter->pdev,
2220                                         scsi_sglist(scb->scp),
2221                                         scsi_sg_count(scb->scp),
2222                                         PCI_DMA_FROMDEVICE);
2223
2224         scsi_dma_unmap(scb->scp);
2225         return;
2226 }
2227
2228
2229 /**
2230  * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2231  * @devp        : pointer to HBA soft state
2232  *
2233  * Pick up the commands from the completed list and send back to the owners.
2234  * This is a reentrant function and does not assume any locks are held while
2235  * it is being called.
2236  */
2237 static void
2238 megaraid_mbox_dpc(unsigned long devp)
2239 {
2240         adapter_t               *adapter = (adapter_t *)devp;
2241         mraid_device_t          *raid_dev;
2242         struct list_head        clist;
2243         struct scatterlist      *sgl;
2244         scb_t                   *scb;
2245         scb_t                   *tmp;
2246         struct scsi_cmnd        *scp;
2247         mraid_passthru_t        *pthru;
2248         mraid_epassthru_t       *epthru;
2249         mbox_ccb_t              *ccb;
2250         int                     islogical;
2251         int                     pdev_index;
2252         int                     pdev_state;
2253         mbox_t                  *mbox;
2254         unsigned long           flags;
2255         uint8_t                 c;
2256         int                     status;
2257         uioc_t                  *kioc;
2258
2259
2260         if (!adapter) return;
2261
2262         raid_dev = ADAP2RAIDDEV(adapter);
2263
2264         // move the SCBs from the completed list to our local list
2265         INIT_LIST_HEAD(&clist);
2266
2267         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2268
2269         list_splice_init(&adapter->completed_list, &clist);
2270
2271         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2272
2273
2274         list_for_each_entry_safe(scb, tmp, &clist, list) {
2275
2276                 status          = scb->status;
2277                 scp             = scb->scp;
2278                 ccb             = (mbox_ccb_t *)scb->ccb;
2279                 pthru           = ccb->pthru;
2280                 epthru          = ccb->epthru;
2281                 mbox            = ccb->mbox;
2282
2283                 // Make sure f/w has completed a valid command
2284                 if (scb->state != SCB_ISSUED) {
2285                         con_log(CL_ANN, (KERN_CRIT
2286                         "megaraid critical err: invalid command %d:%d:%p\n",
2287                                 scb->sno, scb->state, scp));
2288                         BUG();
2289                         continue;       // Must never happen!
2290                 }
2291
2292                 // check for the management command and complete it right away
2293                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2294                         scb->state      = SCB_FREE;
2295                         scb->status     = status;
2296
2297                         // remove from local clist
2298                         list_del_init(&scb->list);
2299
2300                         kioc                    = (uioc_t *)scb->gp;
2301                         kioc->status            = 0;
2302
2303                         megaraid_mbox_mm_done(adapter, scb);
2304
2305                         continue;
2306                 }
2307
2308                 // Was an abort issued for this command earlier
2309                 if (scb->state & SCB_ABORT) {
2310                         con_log(CL_ANN, (KERN_NOTICE
2311                         "megaraid: aborted cmd %lx[%x] completed\n",
2312                                 scp->serial_number, scb->sno));
2313                 }
2314
2315                 /*
2316                  * If the inquiry came of a disk drive which is not part of
2317                  * any RAID array, expose it to the kernel. For this to be
2318                  * enabled, user must set the "megaraid_expose_unconf_disks"
2319                  * flag to 1 by specifying it on module parameter list.
2320                  * This would enable data migration off drives from other
2321                  * configurations.
2322                  */
2323                 islogical = MRAID_IS_LOGICAL(adapter, scp);
2324                 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2325                                 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2326
2327                         sgl = scsi_sglist(scp);
2328                         if (sg_page(sgl)) {
2329                                 c = *(unsigned char *) sg_virt(&sgl[0]);
2330                         } else {
2331                                 con_log(CL_ANN, (KERN_WARNING
2332                                                  "megaraid mailbox: invalid sg:%d\n",
2333                                                  __LINE__));
2334                                 c = 0;
2335                         }
2336
2337                         if ((c & 0x1F ) == TYPE_DISK) {
2338                                 pdev_index = (scb->dev_channel * 16) +
2339                                         scb->dev_target;
2340                                 pdev_state =
2341                                         raid_dev->pdrv_state[pdev_index] & 0x0F;
2342
2343                                 if (pdev_state == PDRV_ONLINE           ||
2344                                         pdev_state == PDRV_FAILED       ||
2345                                         pdev_state == PDRV_RBLD         ||
2346                                         pdev_state == PDRV_HOTSPARE     ||
2347                                         megaraid_expose_unconf_disks == 0) {
2348
2349                                         status = 0xF0;
2350                                 }
2351                         }
2352                 }
2353
2354                 // Convert MegaRAID status to Linux error code
2355                 switch (status) {
2356
2357                 case 0x00:
2358
2359                         scp->result = (DID_OK << 16);
2360                         break;
2361
2362                 case 0x02:
2363
2364                         /* set sense_buffer and result fields */
2365                         if (mbox->cmd == MBOXCMD_PASSTHRU ||
2366                                 mbox->cmd == MBOXCMD_PASSTHRU64) {
2367
2368                                 memcpy(scp->sense_buffer, pthru->reqsensearea,
2369                                                 14);
2370
2371                                 scp->result = DRIVER_SENSE << 24 |
2372                                         DID_OK << 16 | CHECK_CONDITION << 1;
2373                         }
2374                         else {
2375                                 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2376
2377                                         memcpy(scp->sense_buffer,
2378                                                 epthru->reqsensearea, 14);
2379
2380                                         scp->result = DRIVER_SENSE << 24 |
2381                                                 DID_OK << 16 |
2382                                                 CHECK_CONDITION << 1;
2383                                 } else {
2384                                         scp->sense_buffer[0] = 0x70;
2385                                         scp->sense_buffer[2] = ABORTED_COMMAND;
2386                                         scp->result = CHECK_CONDITION << 1;
2387                                 }
2388                         }
2389                         break;
2390
2391                 case 0x08:
2392
2393                         scp->result = DID_BUS_BUSY << 16 | status;
2394                         break;
2395
2396                 default:
2397
2398                         /*
2399                          * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2400                          * failed
2401                          */
2402                         if (scp->cmnd[0] == TEST_UNIT_READY) {
2403                                 scp->result = DID_ERROR << 16 |
2404                                         RESERVATION_CONFLICT << 1;
2405                         }
2406                         else
2407                         /*
2408                          * Error code returned is 1 if Reserve or Release
2409                          * failed or the input parameter is invalid
2410                          */
2411                         if (status == 1 && (scp->cmnd[0] == RESERVE ||
2412                                          scp->cmnd[0] == RELEASE)) {
2413
2414                                 scp->result = DID_ERROR << 16 |
2415                                         RESERVATION_CONFLICT << 1;
2416                         }
2417                         else {
2418                                 scp->result = DID_BAD_TARGET << 16 | status;
2419                         }
2420                 }
2421
2422                 // print a debug message for all failed commands
2423                 if (status) {
2424                         megaraid_mbox_display_scb(adapter, scb);
2425                 }
2426
2427                 // Free our internal resources and call the mid-layer callback
2428                 // routine
2429                 megaraid_mbox_sync_scb(adapter, scb);
2430
2431                 // remove from local clist
2432                 list_del_init(&scb->list);
2433
2434                 // put back in free list
2435                 megaraid_dealloc_scb(adapter, scb);
2436
2437                 // send the scsi packet back to kernel
2438                 scp->scsi_done(scp);
2439         }
2440
2441         return;
2442 }
2443
2444
2445 /**
2446  * megaraid_abort_handler - abort the scsi command
2447  * @scp         : command to be aborted
2448  *
2449  * Abort a previous SCSI request. Only commands on the pending list can be
2450  * aborted. All the commands issued to the F/W must complete.
2451  **/
2452 static int
2453 megaraid_abort_handler(struct scsi_cmnd *scp)
2454 {
2455         adapter_t               *adapter;
2456         mraid_device_t          *raid_dev;
2457         scb_t                   *scb;
2458         scb_t                   *tmp;
2459         int                     found;
2460         unsigned long           flags;
2461         int                     i;
2462
2463
2464         adapter         = SCP2ADAPTER(scp);
2465         raid_dev        = ADAP2RAIDDEV(adapter);
2466
2467         con_log(CL_ANN, (KERN_WARNING
2468                 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2469                 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2470                 SCP2TARGET(scp), SCP2LUN(scp)));
2471
2472         // If FW has stopped responding, simply return failure
2473         if (raid_dev->hw_error) {
2474                 con_log(CL_ANN, (KERN_NOTICE
2475                         "megaraid: hw error, not aborting\n"));
2476                 return FAILED;
2477         }
2478
2479         // There might a race here, where the command was completed by the
2480         // firmware and now it is on the completed list. Before we could
2481         // complete the command to the kernel in dpc, the abort came.
2482         // Find out if this is the case to avoid the race.
2483         scb = NULL;
2484         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2485         list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2486
2487                 if (scb->scp == scp) {  // Found command
2488
2489                         list_del_init(&scb->list);      // from completed list
2490
2491                         con_log(CL_ANN, (KERN_WARNING
2492                         "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2493                                 scp->serial_number, scb->sno,
2494                                 scb->dev_channel, scb->dev_target));
2495
2496                         scp->result = (DID_ABORT << 16);
2497                         scp->scsi_done(scp);
2498
2499                         megaraid_dealloc_scb(adapter, scb);
2500
2501                         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2502                                 flags);
2503
2504                         return SUCCESS;
2505                 }
2506         }
2507         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2508
2509
2510         // Find out if this command is still on the pending list. If it is and
2511         // was never issued, abort and return success. If the command is owned
2512         // by the firmware, we must wait for it to complete by the FW.
2513         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2514         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2515
2516                 if (scb->scp == scp) {  // Found command
2517
2518                         list_del_init(&scb->list);      // from pending list
2519
2520                         ASSERT(!(scb->state & SCB_ISSUED));
2521
2522                         con_log(CL_ANN, (KERN_WARNING
2523                                 "megaraid abort: %ld[%d:%d], driver owner\n",
2524                                 scp->serial_number, scb->dev_channel,
2525                                 scb->dev_target));
2526
2527                         scp->result = (DID_ABORT << 16);
2528                         scp->scsi_done(scp);
2529
2530                         megaraid_dealloc_scb(adapter, scb);
2531
2532                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2533                                 flags);
2534
2535                         return SUCCESS;
2536                 }
2537         }
2538         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2539
2540
2541         // Check do we even own this command, in which case this would be
2542         // owned by the firmware. The only way to locate the FW scb is to
2543         // traverse through the list of all SCB, since driver does not
2544         // maintain these SCBs on any list
2545         found = 0;
2546         spin_lock_irq(&adapter->lock);
2547         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2548                 scb = adapter->kscb_list + i;
2549
2550                 if (scb->scp == scp) {
2551
2552                         found = 1;
2553
2554                         if (!(scb->state & SCB_ISSUED)) {
2555                                 con_log(CL_ANN, (KERN_WARNING
2556                                 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2557                                 scp->serial_number, scb->sno, scb->dev_channel,
2558                                 scb->dev_target));
2559                                 BUG();
2560                         }
2561                         else {
2562                                 con_log(CL_ANN, (KERN_WARNING
2563                                 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2564                                 scp->serial_number, scb->sno, scb->dev_channel,
2565                                 scb->dev_target));
2566                         }
2567                 }
2568         }
2569         spin_unlock_irq(&adapter->lock);
2570
2571         if (!found) {
2572                 con_log(CL_ANN, (KERN_WARNING
2573                         "megaraid abort: scsi cmd:%ld, do now own\n",
2574                         scp->serial_number));
2575
2576                 // FIXME: Should there be a callback for this command?
2577                 return SUCCESS;
2578         }
2579
2580         // We cannot actually abort a command owned by firmware, return
2581         // failure and wait for reset. In host reset handler, we will find out
2582         // if the HBA is still live
2583         return FAILED;
2584 }
2585
2586 /**
2587  * megaraid_reset_handler - device reset hadler for mailbox based driver
2588  * @scp         : reference command
2589  *
2590  * Reset handler for the mailbox based controller. First try to find out if
2591  * the FW is still live, in which case the outstanding commands counter mut go
2592  * down to 0. If that happens, also issue the reservation reset command to
2593  * relinquish (possible) reservations on the logical drives connected to this
2594  * host.
2595  **/
2596 static int
2597 megaraid_reset_handler(struct scsi_cmnd *scp)
2598 {
2599         adapter_t       *adapter;
2600         scb_t           *scb;
2601         scb_t           *tmp;
2602         mraid_device_t  *raid_dev;
2603         unsigned long   flags;
2604         uint8_t         raw_mbox[sizeof(mbox_t)];
2605         int             rval;
2606         int             recovery_window;
2607         int             recovering;
2608         int             i;
2609         uioc_t          *kioc;
2610
2611         adapter         = SCP2ADAPTER(scp);
2612         raid_dev        = ADAP2RAIDDEV(adapter);
2613
2614         // return failure if adapter is not responding
2615         if (raid_dev->hw_error) {
2616                 con_log(CL_ANN, (KERN_NOTICE
2617                         "megaraid: hw error, cannot reset\n"));
2618                 return FAILED;
2619         }
2620
2621
2622         // Under exceptional conditions, FW can take up to 3 minutes to
2623         // complete command processing. Wait for additional 2 minutes for the
2624         // pending commands counter to go down to 0. If it doesn't, let the
2625         // controller be marked offline
2626         // Also, reset all the commands currently owned by the driver
2627         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2628         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2629                 list_del_init(&scb->list);      // from pending list
2630
2631                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2632                         con_log(CL_ANN, (KERN_WARNING
2633                         "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2634                         scb->sno, scb->dev_channel, scb->dev_target));
2635
2636                         scb->status = -1;
2637
2638                         kioc                    = (uioc_t *)scb->gp;
2639                         kioc->status            = -EFAULT;
2640
2641                         megaraid_mbox_mm_done(adapter, scb);
2642                 } else {
2643                         if (scb->scp == scp) {  // Found command
2644                                 con_log(CL_ANN, (KERN_WARNING
2645                                         "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2646                                         scp->serial_number, scb->sno,
2647                                         scb->dev_channel, scb->dev_target));
2648                         } else {
2649                                 con_log(CL_ANN, (KERN_WARNING
2650                                 "megaraid: IO packet with %d[%d:%d] being reset\n",
2651                                 scb->sno, scb->dev_channel, scb->dev_target));
2652                         }
2653
2654                         scb->scp->result = (DID_RESET << 16);
2655                         scb->scp->scsi_done(scb->scp);
2656
2657                         megaraid_dealloc_scb(adapter, scb);
2658                 }
2659         }
2660         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2661
2662         if (adapter->outstanding_cmds) {
2663                 con_log(CL_ANN, (KERN_NOTICE
2664                         "megaraid: %d outstanding commands. Max wait %d sec\n",
2665                         adapter->outstanding_cmds,
2666                         (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
2667         }
2668
2669         recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2670
2671         recovering = adapter->outstanding_cmds;
2672
2673         for (i = 0; i < recovery_window; i++) {
2674
2675                 megaraid_ack_sequence(adapter);
2676
2677                 // print a message once every 5 seconds only
2678                 if (!(i % 5)) {
2679                         con_log(CL_ANN, (
2680                         "megaraid mbox: Wait for %d commands to complete:%d\n",
2681                                 adapter->outstanding_cmds,
2682                                 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
2683                 }
2684
2685                 // bailout if no recovery happended in reset time
2686                 if (adapter->outstanding_cmds == 0) {
2687                         break;
2688                 }
2689
2690                 msleep(1000);
2691         }
2692
2693         spin_lock(&adapter->lock);
2694
2695         // If still outstanding commands, bail out
2696         if (adapter->outstanding_cmds) {
2697                 con_log(CL_ANN, (KERN_WARNING
2698                         "megaraid mbox: critical hardware error!\n"));
2699
2700                 raid_dev->hw_error = 1;
2701
2702                 rval = FAILED;
2703                 goto out;
2704         }
2705         else {
2706                 con_log(CL_ANN, (KERN_NOTICE
2707                 "megaraid mbox: reset sequence completed successfully\n"));
2708         }
2709
2710
2711         // If the controller supports clustering, reset reservations
2712         if (!adapter->ha) {
2713                 rval = SUCCESS;
2714                 goto out;
2715         }
2716
2717         // clear reservations if any
2718         raw_mbox[0] = CLUSTER_CMD;
2719         raw_mbox[2] = RESET_RESERVATIONS;
2720
2721         rval = SUCCESS;
2722         if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2723                 con_log(CL_ANN,
2724                         (KERN_INFO "megaraid: reservation reset\n"));
2725         }
2726         else {
2727                 rval = FAILED;
2728                 con_log(CL_ANN, (KERN_WARNING
2729                                 "megaraid: reservation reset failed\n"));
2730         }
2731
2732  out:
2733         spin_unlock_irq(&adapter->lock);
2734         return rval;
2735 }
2736
2737 /*
2738  * START: internal commands library
2739  *
2740  * This section of the driver has the common routine used by the driver and
2741  * also has all the FW routines
2742  */
2743
2744 /**
2745  * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2746  * @adapter     : controller's soft state
2747  * @raw_mbox    : the mailbox
2748  *
2749  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2750  * controllers.
2751  */
2752 static int
2753 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2754 {
2755         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2756         mbox64_t        *mbox64;
2757         mbox_t          *mbox;
2758         uint8_t         status;
2759         int             i;
2760
2761
2762         mbox64  = raid_dev->mbox64;
2763         mbox    = raid_dev->mbox;
2764
2765         /*
2766          * Wait until mailbox is free
2767          */
2768         if (megaraid_busywait_mbox(raid_dev) != 0)
2769                 goto blocked_mailbox;
2770
2771         /*
2772          * Copy mailbox data into host structure
2773          */
2774         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2775         mbox->cmdid             = 0xFE;
2776         mbox->busy              = 1;
2777         mbox->poll              = 0;
2778         mbox->ack               = 0;
2779         mbox->numstatus         = 0xFF;
2780         mbox->status            = 0xFF;
2781
2782         wmb();
2783         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2784
2785         // wait for maximum 1 second for status to post. If the status is not
2786         // available within 1 second, assume FW is initializing and wait
2787         // for an extended amount of time
2788         if (mbox->numstatus == 0xFF) {  // status not yet available
2789                 udelay(25);
2790
2791                 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2792                         rmb();
2793                         msleep(1);
2794                 }
2795
2796
2797                 if (i == 1000) {
2798                         con_log(CL_ANN, (KERN_NOTICE
2799                                 "megaraid mailbox: wait for FW to boot      "));
2800
2801                         for (i = 0; (mbox->numstatus == 0xFF) &&
2802                                         (i < MBOX_RESET_WAIT); i++) {
2803                                 rmb();
2804                                 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2805                                                         MBOX_RESET_WAIT - i));
2806                                 msleep(1000);
2807                         }
2808
2809                         if (i == MBOX_RESET_WAIT) {
2810
2811                                 con_log(CL_ANN, (
2812                                 "\nmegaraid mailbox: status not available\n"));
2813
2814                                 return -1;
2815                         }
2816                         con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2817                 }
2818         }
2819
2820         // wait for maximum 1 second for poll semaphore
2821         if (mbox->poll != 0x77) {
2822                 udelay(25);
2823
2824                 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2825                         rmb();
2826                         msleep(1);
2827                 }
2828
2829                 if (i == 1000) {
2830                         con_log(CL_ANN, (KERN_WARNING
2831                         "megaraid mailbox: could not get poll semaphore\n"));
2832                         return -1;
2833                 }
2834         }
2835
2836         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2837         wmb();
2838
2839         // wait for maximum 1 second for acknowledgement
2840         if (RDINDOOR(raid_dev) & 0x2) {
2841                 udelay(25);
2842
2843                 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2844                         rmb();
2845                         msleep(1);
2846                 }
2847
2848                 if (i == 1000) {
2849                         con_log(CL_ANN, (KERN_WARNING
2850                                 "megaraid mailbox: could not acknowledge\n"));
2851                         return -1;
2852                 }
2853         }
2854         mbox->poll      = 0;
2855         mbox->ack       = 0x77;
2856
2857         status = mbox->status;
2858
2859         // invalidate the completed command id array. After command
2860         // completion, firmware would write the valid id.
2861         mbox->numstatus = 0xFF;
2862         mbox->status    = 0xFF;
2863         for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2864                 mbox->completed[i] = 0xFF;
2865         }
2866
2867         return status;
2868
2869 blocked_mailbox:
2870
2871         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2872         return -1;
2873 }
2874
2875
2876 /**
2877  * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2878  * @adapter     : controller's soft state
2879  * @raw_mbox    : the mailbox
2880  *
2881  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2882  * controllers. This is a faster version of the synchronous command and
2883  * therefore can be called in interrupt-context as well.
2884  */
2885 static int
2886 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2887 {
2888         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2889         mbox_t          *mbox;
2890         long            i;
2891
2892
2893         mbox    = raid_dev->mbox;
2894
2895         // return immediately if the mailbox is busy
2896         if (mbox->busy) return -1;
2897
2898         // Copy mailbox data into host structure
2899         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2900         mbox->cmdid             = 0xFE;
2901         mbox->busy              = 1;
2902         mbox->poll              = 0;
2903         mbox->ack               = 0;
2904         mbox->numstatus         = 0xFF;
2905         mbox->status            = 0xFF;
2906
2907         wmb();
2908         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2909
2910         for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
2911                 if (mbox->numstatus != 0xFF) break;
2912                 rmb();
2913                 udelay(MBOX_SYNC_DELAY_200);
2914         }
2915
2916         if (i == MBOX_SYNC_WAIT_CNT) {
2917                 // We may need to re-calibrate the counter
2918                 con_log(CL_ANN, (KERN_CRIT
2919                         "megaraid: fast sync command timed out\n"));
2920         }
2921
2922         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2923         wmb();
2924
2925         return mbox->status;
2926 }
2927
2928
2929 /**
2930  * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
2931  * @raid_dev    : RAID device (HBA) soft state
2932  *
2933  * Wait until the controller's mailbox is available to accept more commands.
2934  * Wait for at most 1 second.
2935  */
2936 static int
2937 megaraid_busywait_mbox(mraid_device_t *raid_dev)
2938 {
2939         mbox_t  *mbox = raid_dev->mbox;
2940         int     i = 0;
2941
2942         if (mbox->busy) {
2943                 udelay(25);
2944                 for (i = 0; mbox->busy && i < 1000; i++)
2945                         msleep(1);
2946         }
2947
2948         if (i < 1000) return 0;
2949         else return -1;
2950 }
2951
2952
2953 /**
2954  * megaraid_mbox_product_info - some static information about the controller
2955  * @adapter     : our soft state
2956  *
2957  * Issue commands to the controller to grab some parameters required by our
2958  * caller.
2959  */
2960 static int
2961 megaraid_mbox_product_info(adapter_t *adapter)
2962 {
2963         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2964         mbox_t                  *mbox;
2965         uint8_t                 raw_mbox[sizeof(mbox_t)];
2966         mraid_pinfo_t           *pinfo;
2967         dma_addr_t              pinfo_dma_h;
2968         mraid_inquiry3_t        *mraid_inq3;
2969         int                     i;
2970
2971
2972         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2973         mbox = (mbox_t *)raw_mbox;
2974
2975         /*
2976          * Issue an ENQUIRY3 command to find out certain adapter parameters,
2977          * e.g., max channels, max commands etc.
2978          */
2979         pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
2980                         &pinfo_dma_h);
2981
2982         if (pinfo == NULL) {
2983                 con_log(CL_ANN, (KERN_WARNING
2984                         "megaraid: out of memory, %s %d\n", __func__,
2985                         __LINE__));
2986
2987                 return -1;
2988         }
2989         memset(pinfo, 0, sizeof(mraid_pinfo_t));
2990
2991         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
2992         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
2993
2994         raw_mbox[0] = FC_NEW_CONFIG;
2995         raw_mbox[2] = NC_SUBOP_ENQUIRY3;
2996         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
2997
2998         // Issue the command
2999         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3000
3001                 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3002
3003                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3004                         pinfo, pinfo_dma_h);
3005
3006                 return -1;
3007         }
3008
3009         /*
3010          * Collect information about state of each physical drive
3011          * attached to the controller. We will expose all the disks
3012          * which are not part of RAID
3013          */
3014         mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3015         for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3016                 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3017         }
3018
3019         /*
3020          * Get product info for information like number of channels,
3021          * maximum commands supported.
3022          */
3023         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3024         mbox->xferaddr = (uint32_t)pinfo_dma_h;
3025
3026         raw_mbox[0] = FC_NEW_CONFIG;
3027         raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3028
3029         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3030
3031                 con_log(CL_ANN, (KERN_WARNING
3032                         "megaraid: product info failed\n"));
3033
3034                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3035                         pinfo, pinfo_dma_h);
3036
3037                 return -1;
3038         }
3039
3040         /*
3041          * Setup some parameters for host, as required by our caller
3042          */
3043         adapter->max_channel = pinfo->nchannels;
3044
3045         /*
3046          * we will export all the logical drives on a single channel.
3047          * Add 1 since inquires do not come for inititor ID
3048          */
3049         adapter->max_target     = MAX_LOGICAL_DRIVES_40LD + 1;
3050         adapter->max_lun        = 8;    // up to 8 LUNs for non-disk devices
3051
3052         /*
3053          * These are the maximum outstanding commands for the scsi-layer
3054          */
3055         adapter->max_cmds       = MBOX_MAX_SCSI_CMDS;
3056
3057         memset(adapter->fw_version, 0, VERSION_SIZE);
3058         memset(adapter->bios_version, 0, VERSION_SIZE);
3059
3060         memcpy(adapter->fw_version, pinfo->fw_version, 4);
3061         adapter->fw_version[4] = 0;
3062
3063         memcpy(adapter->bios_version, pinfo->bios_version, 4);
3064         adapter->bios_version[4] = 0;
3065
3066         con_log(CL_ANN, (KERN_NOTICE
3067                 "megaraid: fw version:[%s] bios version:[%s]\n",
3068                 adapter->fw_version, adapter->bios_version));
3069
3070         pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3071                         pinfo_dma_h);
3072
3073         return 0;
3074 }
3075
3076
3077
3078 /**
3079  * megaraid_mbox_extended_cdb - check for support for extended CDBs
3080  * @adapter     : soft state for the controller
3081  *
3082  * This routine check whether the controller in question supports extended
3083  * ( > 10 bytes ) CDBs.
3084  */
3085 static int
3086 megaraid_mbox_extended_cdb(adapter_t *adapter)
3087 {
3088         mbox_t          *mbox;
3089         uint8_t         raw_mbox[sizeof(mbox_t)];
3090         int             rval;
3091
3092         mbox = (mbox_t *)raw_mbox;
3093
3094         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3095         mbox->xferaddr  = (uint32_t)adapter->ibuf_dma_h;
3096
3097         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3098
3099         raw_mbox[0] = MAIN_MISC_OPCODE;
3100         raw_mbox[2] = SUPPORT_EXT_CDB;
3101
3102         /*
3103          * Issue the command
3104          */
3105         rval = 0;
3106         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3107                 rval = -1;
3108         }
3109
3110         return rval;
3111 }
3112
3113
3114 /**
3115  * megaraid_mbox_support_ha - Do we support clustering
3116  * @adapter     : soft state for the controller
3117  * @init_id     : ID of the initiator
3118  *
3119  * Determine if the firmware supports clustering and the ID of the initiator.
3120  */
3121 static int
3122 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3123 {
3124         mbox_t          *mbox;
3125         uint8_t         raw_mbox[sizeof(mbox_t)];
3126         int             rval;
3127
3128
3129         mbox = (mbox_t *)raw_mbox;
3130
3131         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3132
3133         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3134
3135         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3136
3137         raw_mbox[0] = GET_TARGET_ID;
3138
3139         // Issue the command
3140         *init_id = 7;
3141         rval =  -1;
3142         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3143
3144                 *init_id = *(uint8_t *)adapter->ibuf;
3145
3146                 con_log(CL_ANN, (KERN_INFO
3147                         "megaraid: cluster firmware, initiator ID: %d\n",
3148                         *init_id));
3149
3150                 rval =  0;
3151         }
3152
3153         return rval;
3154 }
3155
3156
3157 /**
3158  * megaraid_mbox_support_random_del - Do we support random deletion
3159  * @adapter     : soft state for the controller
3160  *
3161  * Determine if the firmware supports random deletion.
3162  * Return:      1 is operation supported, 0 otherwise
3163  */
3164 static int
3165 megaraid_mbox_support_random_del(adapter_t *adapter)
3166 {
3167         mbox_t          *mbox;
3168         uint8_t         raw_mbox[sizeof(mbox_t)];
3169         int             rval;
3170
3171         /*
3172          * Newer firmware on Dell CERC expect a different
3173          * random deletion handling, so disable it.
3174          */
3175         if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI &&
3176             adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 &&
3177             adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
3178             adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH &&
3179             (adapter->fw_version[0] > '6' ||
3180              (adapter->fw_version[0] == '6' &&
3181               adapter->fw_version[2] > '6') ||
3182              (adapter->fw_version[0] == '6'
3183               && adapter->fw_version[2] == '6'
3184               && adapter->fw_version[3] > '1'))) {
3185                 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n"));
3186                 return 0;
3187         }
3188
3189         mbox = (mbox_t *)raw_mbox;
3190
3191         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3192
3193         raw_mbox[0] = FC_DEL_LOGDRV;
3194         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3195
3196         // Issue the command
3197         rval = 0;
3198         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3199
3200                 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3201
3202                 rval =  1;
3203         }
3204
3205         return rval;
3206 }
3207
3208
3209 /**
3210  * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3211  * @adapter     : soft state for the controller
3212  *
3213  * Find out the maximum number of scatter-gather elements supported by the
3214  * firmware.
3215  */
3216 static int
3217 megaraid_mbox_get_max_sg(adapter_t *adapter)
3218 {
3219         mbox_t          *mbox;
3220         uint8_t         raw_mbox[sizeof(mbox_t)];
3221         int             nsg;
3222
3223
3224         mbox = (mbox_t *)raw_mbox;
3225
3226         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3227
3228         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3229
3230         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3231
3232         raw_mbox[0] = MAIN_MISC_OPCODE;
3233         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3234
3235         // Issue the command
3236         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3237                 nsg =  *(uint8_t *)adapter->ibuf;
3238         }
3239         else {
3240                 nsg =  MBOX_DEFAULT_SG_SIZE;
3241         }
3242
3243         if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3244
3245         return nsg;
3246 }
3247
3248
3249 /**
3250  * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3251  * @adapter     : soft state for the controller
3252  *
3253  * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3254  * can be exported as regular SCSI channels.
3255  */
3256 static void
3257 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3258 {
3259         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3260         mbox_t          *mbox;
3261         uint8_t         raw_mbox[sizeof(mbox_t)];
3262
3263
3264         mbox = (mbox_t *)raw_mbox;
3265
3266         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3267
3268         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3269
3270         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3271
3272         raw_mbox[0] = CHNL_CLASS;
3273         raw_mbox[2] = GET_CHNL_CLASS;
3274
3275         // Issue the command. If the command fails, all channels are RAID
3276         // channels
3277         raid_dev->channel_class = 0xFF;
3278         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3279                 raid_dev->channel_class =  *(uint8_t *)adapter->ibuf;
3280         }
3281
3282         return;
3283 }
3284
3285
3286 /**
3287  * megaraid_mbox_flush_cache - flush adapter and disks cache
3288  * @adapter             : soft state for the controller
3289  *
3290  * Flush adapter cache followed by disks cache.
3291  */
3292 static void
3293 megaraid_mbox_flush_cache(adapter_t *adapter)
3294 {
3295         mbox_t  *mbox;
3296         uint8_t raw_mbox[sizeof(mbox_t)];
3297
3298
3299         mbox = (mbox_t *)raw_mbox;
3300
3301         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3302
3303         raw_mbox[0] = FLUSH_ADAPTER;
3304
3305         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3306                 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3307         }
3308
3309         raw_mbox[0] = FLUSH_SYSTEM;
3310
3311         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3312                 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3313         }
3314
3315         return;
3316 }
3317
3318
3319 /**
3320  * megaraid_mbox_fire_sync_cmd - fire the sync cmd
3321  * @adapter             : soft state for the controller
3322  *
3323  * Clears the pending cmds in FW and reinits its RAID structs.
3324  */
3325 static int
3326 megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3327 {
3328         mbox_t  *mbox;
3329         uint8_t raw_mbox[sizeof(mbox_t)];
3330         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3331         mbox64_t *mbox64;
3332         int     status = 0;
3333         int i;
3334         uint32_t dword;
3335
3336         mbox = (mbox_t *)raw_mbox;
3337
3338         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3339
3340         raw_mbox[0] = 0xFF;
3341
3342         mbox64  = raid_dev->mbox64;
3343         mbox    = raid_dev->mbox;
3344
3345         /* Wait until mailbox is free */
3346         if (megaraid_busywait_mbox(raid_dev) != 0) {
3347                 status = 1;
3348                 goto blocked_mailbox;
3349         }
3350
3351         /* Copy mailbox data into host structure */
3352         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3353         mbox->cmdid             = 0xFE;
3354         mbox->busy              = 1;
3355         mbox->poll              = 0;
3356         mbox->ack               = 0;
3357         mbox->numstatus         = 0;
3358         mbox->status            = 0;
3359
3360         wmb();
3361         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3362
3363         /* Wait for maximum 1 min for status to post.
3364          * If the Firmware SUPPORTS the ABOVE COMMAND,
3365          * mbox->cmd will be set to 0
3366          * else
3367          * the firmware will reject the command with
3368          * mbox->numstatus set to 1
3369          */
3370
3371         i = 0;
3372         status = 0;
3373         while (!mbox->numstatus && mbox->cmd == 0xFF) {
3374                 rmb();
3375                 msleep(1);
3376                 i++;
3377                 if (i > 1000 * 60) {
3378                         status = 1;
3379                         break;
3380                 }
3381         }
3382         if (mbox->numstatus == 1)
3383                 status = 1; /*cmd not supported*/
3384
3385         /* Check for interrupt line */
3386         dword = RDOUTDOOR(raid_dev);
3387         WROUTDOOR(raid_dev, dword);
3388         WRINDOOR(raid_dev,2);
3389
3390         return status;
3391
3392 blocked_mailbox:
3393         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3394         return status;
3395 }
3396
3397 /**
3398  * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3399  * @adapter             : controller's soft state
3400  * @scb                 : SCB to be displayed
3401  * @level               : debug level for console print
3402  *
3403  * Diplay information about the given SCB iff the current debug level is
3404  * verbose.
3405  */
3406 static void
3407 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3408 {
3409         mbox_ccb_t              *ccb;
3410         struct scsi_cmnd        *scp;
3411         mbox_t                  *mbox;
3412         int                     level;
3413         int                     i;
3414
3415
3416         ccb     = (mbox_ccb_t *)scb->ccb;
3417         scp     = scb->scp;
3418         mbox    = ccb->mbox;
3419
3420         level = CL_DLEVEL3;
3421
3422         con_log(level, (KERN_NOTICE
3423                 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3424                 mbox->cmd, scb->sno));
3425
3426         con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3427                 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3428                 mbox->numsge));
3429
3430         if (!scp) return;
3431
3432         con_log(level, (KERN_NOTICE "scsi cmnd: "));
3433
3434         for (i = 0; i < scp->cmd_len; i++) {
3435                 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3436         }
3437
3438         con_log(level, ("\n"));
3439
3440         return;
3441 }
3442
3443
3444 /**
3445  * megaraid_mbox_setup_device_map - manage device ids
3446  * @adapter     : Driver's soft state
3447  *
3448  * Manange the device ids to have an appropraite mapping between the kernel
3449  * scsi addresses and megaraid scsi and logical drive addresses. We export
3450  * scsi devices on their actual addresses, whereas the logical drives are
3451  * exported on a virtual scsi channel.
3452  */
3453 static void
3454 megaraid_mbox_setup_device_map(adapter_t *adapter)
3455 {
3456         uint8_t         c;
3457         uint8_t         t;
3458
3459         /*
3460          * First fill the values on the logical drive channel
3461          */
3462         for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3463                 adapter->device_ids[adapter->max_channel][t] =
3464                         (t < adapter->init_id) ?  t : t - 1;
3465
3466         adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3467
3468         /*
3469          * Fill the values on the physical devices channels
3470          */
3471         for (c = 0; c < adapter->max_channel; c++)
3472                 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3473                         adapter->device_ids[c][t] = (c << 8) | t;
3474 }
3475
3476
3477 /*
3478  * END: internal commands library
3479  */
3480
3481 /*
3482  * START: Interface for the common management module
3483  *
3484  * This is the module, which interfaces with the common management module to
3485  * provide support for ioctl and sysfs
3486  */
3487
3488 /**
3489  * megaraid_cmm_register - register with the management module
3490  * @adapter             : HBA soft state
3491  *
3492  * Register with the management module, which allows applications to issue
3493  * ioctl calls to the drivers. This interface is used by the management module
3494  * to setup sysfs support as well.
3495  */
3496 static int
3497 megaraid_cmm_register(adapter_t *adapter)
3498 {
3499         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3500         mraid_mmadp_t   adp;
3501         scb_t           *scb;
3502         mbox_ccb_t      *ccb;
3503         int             rval;
3504         int             i;
3505
3506         // Allocate memory for the base list of scb for management module.
3507         adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL);
3508
3509         if (adapter->uscb_list == NULL) {
3510                 con_log(CL_ANN, (KERN_WARNING
3511                         "megaraid: out of memory, %s %d\n", __func__,
3512                         __LINE__));
3513                 return -1;
3514         }
3515
3516
3517         // Initialize the synchronization parameters for resources for
3518         // commands for management module
3519         INIT_LIST_HEAD(&adapter->uscb_pool);
3520
3521         spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3522
3523
3524
3525         // link all the packets. Note, CCB for commands, coming from the
3526         // commom management module, mailbox physical address are already
3527         // setup by it. We just need placeholder for that in our local command
3528         // control blocks
3529         for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3530
3531                 scb                     = adapter->uscb_list + i;
3532                 ccb                     = raid_dev->uccb_list + i;
3533
3534                 scb->ccb                = (caddr_t)ccb;
3535                 ccb->mbox64             = raid_dev->umbox64 + i;
3536                 ccb->mbox               = &ccb->mbox64->mbox32;
3537                 ccb->raw_mbox           = (uint8_t *)ccb->mbox;
3538
3539                 scb->gp                 = 0;
3540
3541                 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3542                 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3543                 scb->sno                = i + MBOX_MAX_SCSI_CMDS;
3544
3545                 scb->scp                = NULL;
3546                 scb->state              = SCB_FREE;
3547                 scb->dma_direction      = PCI_DMA_NONE;
3548                 scb->dma_type           = MRAID_DMA_NONE;
3549                 scb->dev_channel        = -1;
3550                 scb->dev_target         = -1;
3551
3552                 // put scb in the free pool
3553                 list_add_tail(&scb->list, &adapter->uscb_pool);
3554         }
3555
3556         adp.unique_id           = adapter->unique_id;
3557         adp.drvr_type           = DRVRTYPE_MBOX;
3558         adp.drvr_data           = (unsigned long)adapter;
3559         adp.pdev                = adapter->pdev;
3560         adp.issue_uioc          = megaraid_mbox_mm_handler;
3561         adp.timeout             = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
3562         adp.max_kioc            = MBOX_MAX_USER_CMDS;
3563
3564         if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3565
3566                 con_log(CL_ANN, (KERN_WARNING
3567                         "megaraid mbox: did not register with CMM\n"));
3568
3569                 kfree(adapter->uscb_list);
3570         }
3571
3572         return rval;
3573 }
3574
3575
3576 /**
3577  * megaraid_cmm_unregister - un-register with the management module
3578  * @adapter             : HBA soft state
3579  *
3580  * Un-register with the management module.
3581  * FIXME: mgmt module must return failure for unregister if it has pending
3582  * commands in LLD.
3583  */
3584 static int
3585 megaraid_cmm_unregister(adapter_t *adapter)
3586 {
3587         kfree(adapter->uscb_list);
3588         mraid_mm_unregister_adp(adapter->unique_id);
3589         return 0;
3590 }
3591
3592
3593 /**
3594  * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3595  * @drvr_data           : LLD specific data
3596  * @kioc                : CMM interface packet
3597  * @action              : command action
3598  *
3599  * This routine is invoked whenever the Common Management Module (CMM) has a
3600  * command for us. The 'action' parameter specifies if this is a new command
3601  * or otherwise.
3602  */
3603 static int
3604 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3605 {
3606         adapter_t *adapter;
3607
3608         if (action != IOCTL_ISSUE) {
3609                 con_log(CL_ANN, (KERN_WARNING
3610                         "megaraid: unsupported management action:%#2x\n",
3611                         action));
3612                 return (-ENOTSUPP);
3613         }
3614
3615         adapter = (adapter_t *)drvr_data;
3616
3617         // make sure this adapter is not being detached right now.
3618         if (atomic_read(&adapter->being_detached)) {
3619                 con_log(CL_ANN, (KERN_WARNING
3620                         "megaraid: reject management request, detaching\n"));
3621                 return (-ENODEV);
3622         }
3623
3624         switch (kioc->opcode) {
3625
3626         case GET_ADAP_INFO:
3627
3628                 kioc->status =  gather_hbainfo(adapter, (mraid_hba_info_t *)
3629                                         (unsigned long)kioc->buf_vaddr);
3630
3631                 kioc->done(kioc);
3632
3633                 return kioc->status;
3634
3635         case MBOX_CMD:
3636
3637                 return megaraid_mbox_mm_command(adapter, kioc);
3638
3639         default:
3640                 kioc->status = (-EINVAL);
3641                 kioc->done(kioc);
3642                 return (-EINVAL);
3643         }
3644
3645         return 0;       // not reached
3646 }
3647
3648 /**
3649  * megaraid_mbox_mm_command - issues commands routed through CMM
3650  * @adapter             : HBA soft state
3651  * @kioc                : management command packet
3652  *
3653  * Issues commands, which are routed through the management module.
3654  */
3655 static int
3656 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3657 {
3658         struct list_head        *head = &adapter->uscb_pool;
3659         mbox64_t                *mbox64;
3660         uint8_t                 *raw_mbox;
3661         scb_t                   *scb;
3662         mbox_ccb_t              *ccb;
3663         unsigned long           flags;
3664
3665         // detach one scb from free pool
3666         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3667
3668         if (list_empty(head)) { // should never happen because of CMM
3669
3670                 con_log(CL_ANN, (KERN_WARNING
3671                         "megaraid mbox: bug in cmm handler, lost resources\n"));
3672
3673                 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3674
3675                 return (-EINVAL);
3676         }
3677
3678         scb = list_entry(head->next, scb_t, list);
3679         list_del_init(&scb->list);
3680
3681         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3682
3683         scb->state              = SCB_ACTIVE;
3684         scb->dma_type           = MRAID_DMA_NONE;
3685         scb->dma_direction      = PCI_DMA_NONE;
3686
3687         ccb             = (mbox_ccb_t *)scb->ccb;
3688         mbox64          = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3689         raw_mbox        = (uint8_t *)&mbox64->mbox32;
3690
3691         memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3692
3693         scb->gp         = (unsigned long)kioc;
3694
3695         /*
3696          * If it is a logdrv random delete operation, we have to wait till
3697          * there are no outstanding cmds at the fw and then issue it directly
3698          */
3699         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3700
3701                 if (wait_till_fw_empty(adapter)) {
3702                         con_log(CL_ANN, (KERN_NOTICE
3703                                 "megaraid mbox: LD delete, timed out\n"));
3704
3705                         kioc->status = -ETIME;
3706
3707                         scb->status = -1;
3708
3709                         megaraid_mbox_mm_done(adapter, scb);
3710
3711                         return (-ETIME);
3712                 }
3713
3714                 INIT_LIST_HEAD(&scb->list);
3715
3716                 scb->state = SCB_ISSUED;
3717                 if (mbox_post_cmd(adapter, scb) != 0) {
3718
3719                         con_log(CL_ANN, (KERN_NOTICE
3720                                 "megaraid mbox: LD delete, mailbox busy\n"));
3721
3722                         kioc->status = -EBUSY;
3723
3724                         scb->status = -1;
3725
3726                         megaraid_mbox_mm_done(adapter, scb);
3727
3728                         return (-EBUSY);
3729                 }
3730
3731                 return 0;
3732         }
3733
3734         // put the command on the pending list and execute
3735         megaraid_mbox_runpendq(adapter, scb);
3736
3737         return 0;
3738 }
3739
3740
3741 static int
3742 wait_till_fw_empty(adapter_t *adapter)
3743 {
3744         unsigned long   flags = 0;
3745         int             i;
3746
3747
3748         /*
3749          * Set the quiescent flag to stop issuing cmds to FW.
3750          */
3751         spin_lock_irqsave(&adapter->lock, flags);
3752         adapter->quiescent++;
3753         spin_unlock_irqrestore(&adapter->lock, flags);
3754
3755         /*
3756          * Wait till there are no more cmds outstanding at FW. Try for at most
3757          * 60 seconds
3758          */
3759         for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3760                 con_log(CL_DLEVEL1, (KERN_INFO
3761                         "megaraid: FW has %d pending commands\n",
3762                         adapter->outstanding_cmds));
3763
3764                 msleep(1000);
3765         }
3766
3767         return adapter->outstanding_cmds;
3768 }
3769
3770
3771 /**
3772  * megaraid_mbox_mm_done - callback for CMM commands
3773  * @adapter     : HBA soft state
3774  * @scb         : completed command
3775  *
3776  * Callback routine for internal commands originated from the management
3777  * module.
3778  */
3779 static void
3780 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3781 {
3782         uioc_t                  *kioc;
3783         mbox64_t                *mbox64;
3784         uint8_t                 *raw_mbox;
3785         unsigned long           flags;
3786
3787         kioc                    = (uioc_t *)scb->gp;
3788         mbox64                  = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3789         mbox64->mbox32.status   = scb->status;
3790         raw_mbox                = (uint8_t *)&mbox64->mbox32;
3791
3792
3793         // put scb in the free pool
3794         scb->state      = SCB_FREE;
3795         scb->scp        = NULL;
3796
3797         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3798
3799         list_add(&scb->list, &adapter->uscb_pool);
3800
3801         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3802
3803         // if a delete logical drive operation succeeded, restart the
3804         // controller
3805         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3806
3807                 adapter->quiescent--;
3808
3809                 megaraid_mbox_runpendq(adapter, NULL);
3810         }
3811
3812         kioc->done(kioc);
3813
3814         return;
3815 }
3816
3817
3818 /**
3819  * gather_hbainfo - HBA characteristics for the applications
3820  * @adapter             : HBA soft state
3821  * @hinfo               : pointer to the caller's host info strucuture
3822  */
3823 static int
3824 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3825 {
3826         uint8_t dmajor;
3827
3828         dmajor                  = megaraid_mbox_version[0];
3829
3830         hinfo->pci_vendor_id    = adapter->pdev->vendor;
3831         hinfo->pci_device_id    = adapter->pdev->device;
3832         hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3833         hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3834
3835         hinfo->pci_bus          = adapter->pdev->bus->number;
3836         hinfo->pci_dev_fn       = adapter->pdev->devfn;
3837         hinfo->pci_slot         = PCI_SLOT(adapter->pdev->devfn);
3838         hinfo->irq              = adapter->host->irq;
3839         hinfo->baseport         = ADAP2RAIDDEV(adapter)->baseport;
3840
3841         hinfo->unique_id        = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3842         hinfo->host_no          = adapter->host->host_no;
3843
3844         return 0;
3845 }
3846
3847 /*
3848  * END: Interface for the common management module
3849  */
3850
3851
3852
3853 /**
3854  * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3855  * @adapter     : controller's soft state
3856  *
3857  * Allocate packets required to issue FW calls whenever the sysfs attributes
3858  * are read. These attributes would require up-to-date information from the
3859  * FW. Also set up resources for mutual exclusion to share these resources and
3860  * the wait queue.
3861  *
3862  * Return 0 on success.
3863  * Return -ERROR_CODE on failure.
3864  */
3865 static int
3866 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3867 {
3868         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3869         int             rval = 0;
3870
3871         raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3872
3873         raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3874
3875         raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3876                         PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3877
3878         if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3879                 !raid_dev->sysfs_buffer) {
3880
3881                 con_log(CL_ANN, (KERN_WARNING
3882                         "megaraid: out of memory, %s %d\n", __func__,
3883                         __LINE__));
3884
3885                 rval = -ENOMEM;
3886
3887                 megaraid_sysfs_free_resources(adapter);
3888         }
3889
3890         mutex_init(&raid_dev->sysfs_mtx);
3891
3892         init_waitqueue_head(&raid_dev->sysfs_wait_q);
3893
3894         return rval;
3895 }
3896
3897
3898 /**
3899  * megaraid_sysfs_free_resources - free sysfs related resources
3900  * @adapter     : controller's soft state
3901  *
3902  * Free packets allocated for sysfs FW commands
3903  */
3904 static void
3905 megaraid_sysfs_free_resources(adapter_t *adapter)
3906 {
3907         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3908
3909         kfree(raid_dev->sysfs_uioc);
3910         kfree(raid_dev->sysfs_mbox64);
3911
3912         if (raid_dev->sysfs_buffer) {
3913                 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3914                         raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3915         }
3916 }
3917
3918
3919 /**
3920  * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3921  * @uioc        : completed packet
3922  *
3923  * Callback routine called in the ISR/tasklet context for get ldmap call
3924  */
3925 static void
3926 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3927 {
3928         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3929         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3930
3931         uioc->status = 0;
3932
3933         wake_up(&raid_dev->sysfs_wait_q);
3934 }
3935
3936
3937 /**
3938  * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3939  * @data        : timed out packet
3940  *
3941  * Timeout routine to recover and return to application, in case the adapter
3942  * has stopped responding. A timeout of 60 seconds for this command seems like
3943  * a good value.
3944  */
3945 static void
3946 megaraid_sysfs_get_ldmap_timeout(unsigned long data)
3947 {
3948         uioc_t          *uioc = (uioc_t *)data;
3949         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3950         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3951
3952         uioc->status = -ETIME;
3953
3954         wake_up(&raid_dev->sysfs_wait_q);
3955 }
3956
3957
3958 /**
3959  * megaraid_sysfs_get_ldmap - get update logical drive map
3960  * @adapter     : controller's soft state
3961  *
3962  * This routine will be called whenever user reads the logical drive
3963  * attributes, go get the current logical drive mapping table from the
3964  * firmware. We use the management API's to issue commands to the controller.
3965  *
3966  * NOTE: The commands issuance functionality is not generalized and
3967  * implemented in context of "get ld map" command only. If required, the
3968  * command issuance logical can be trivially pulled out and implemented as a
3969  * standalone libary. For now, this should suffice since there is no other
3970  * user of this interface.
3971  *
3972  * Return 0 on success.
3973  * Return -1 on failure.
3974  */
3975 static int
3976 megaraid_sysfs_get_ldmap(adapter_t *adapter)
3977 {
3978         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
3979         uioc_t                  *uioc;
3980         mbox64_t                *mbox64;
3981         mbox_t                  *mbox;
3982         char                    *raw_mbox;
3983         struct timer_list       sysfs_timer;
3984         struct timer_list       *timerp;
3985         caddr_t                 ldmap;
3986         int                     rval = 0;
3987
3988         /*
3989          * Allow only one read at a time to go through the sysfs attributes
3990          */
3991         mutex_lock(&raid_dev->sysfs_mtx);
3992
3993         uioc    = raid_dev->sysfs_uioc;
3994         mbox64  = raid_dev->sysfs_mbox64;
3995         ldmap   = raid_dev->sysfs_buffer;
3996
3997         memset(uioc, 0, sizeof(uioc_t));
3998         memset(mbox64, 0, sizeof(mbox64_t));
3999         memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
4000
4001         mbox            = &mbox64->mbox32;
4002         raw_mbox        = (char *)mbox;
4003         uioc->cmdbuf    = (uint64_t)(unsigned long)mbox64;
4004         uioc->buf_vaddr = (caddr_t)adapter;
4005         uioc->status    = -ENODATA;
4006         uioc->done      = megaraid_sysfs_get_ldmap_done;
4007
4008         /*
4009          * Prepare the mailbox packet to get the current logical drive mapping
4010          * table
4011          */
4012         mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
4013
4014         raw_mbox[0] = FC_DEL_LOGDRV;
4015         raw_mbox[2] = OP_GET_LDID_MAP;
4016
4017         /*
4018          * Setup a timer to recover from a non-responding controller
4019          */
4020         timerp  = &sysfs_timer;
4021         init_timer(timerp);
4022
4023         timerp->function        = megaraid_sysfs_get_ldmap_timeout;
4024         timerp->data            = (unsigned long)uioc;
4025         timerp->expires         = jiffies + 60 * HZ;
4026
4027         add_timer(timerp);
4028
4029         /*
4030          * Send the command to the firmware
4031          */
4032         rval = megaraid_mbox_mm_command(adapter, uioc);
4033
4034         if (rval == 0) {        // command successfully issued
4035                 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4036
4037                 /*
4038                  * Check if the command timed out
4039                  */
4040                 if (uioc->status == -ETIME) {
4041                         con_log(CL_ANN, (KERN_NOTICE
4042                                 "megaraid: sysfs get ld map timed out\n"));
4043
4044                         rval = -ETIME;
4045                 }
4046                 else {
4047                         rval = mbox->status;
4048                 }
4049
4050                 if (rval == 0) {
4051                         memcpy(raid_dev->curr_ldmap, ldmap,
4052                                 sizeof(raid_dev->curr_ldmap));
4053                 }
4054                 else {
4055                         con_log(CL_ANN, (KERN_NOTICE
4056                                 "megaraid: get ld map failed with %x\n", rval));
4057                 }
4058         }
4059         else {
4060                 con_log(CL_ANN, (KERN_NOTICE
4061                         "megaraid: could not issue ldmap command:%x\n", rval));
4062         }
4063
4064
4065         del_timer_sync(timerp);
4066
4067         mutex_unlock(&raid_dev->sysfs_mtx);
4068
4069         return rval;
4070 }
4071
4072
4073 /**
4074  * megaraid_sysfs_show_app_hndl - display application handle for this adapter
4075  * @cdev        : class device object representation for the host
4076  * @buf         : buffer to send data to
4077  *
4078  * Display the handle used by the applications while executing management
4079  * tasks on the adapter. We invoke a management module API to get the adapter
4080  * handle, since we do not interface with applications directly.
4081  */
4082 static ssize_t
4083 megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr,
4084                              char *buf)
4085 {
4086         struct Scsi_Host *shost = class_to_shost(dev);
4087         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4088         uint32_t        app_hndl;
4089
4090         app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4091
4092         return snprintf(buf, 8, "%u\n", app_hndl);
4093 }
4094
4095
4096 /**
4097  * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4098  * @dev         : device object representation for the scsi device
4099  * @attr        : device attribute to show
4100  * @buf         : buffer to send data to
4101  *
4102  * Display the logical drive number for the device in question, if it a valid
4103  * logical drive. For physical devices, "-1" is returned.
4104  *
4105  * The logical drive number is displayed in following format:
4106  *
4107  * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4108  *
4109  *   <int>     <int>       <int>            <int>
4110  */
4111 static ssize_t
4112 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
4113 {
4114         struct scsi_device *sdev = to_scsi_device(dev);
4115         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4116         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
4117         int             scsi_id = -1;
4118         int             logical_drv = -1;
4119         int             ldid_map = -1;
4120         uint32_t        app_hndl = 0;
4121         int             mapped_sdev_id;
4122         int             rval;
4123         int             i;
4124
4125         if (raid_dev->random_del_supported &&
4126                         MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4127
4128                 rval = megaraid_sysfs_get_ldmap(adapter);
4129                 if (rval == 0) {
4130
4131                         for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4132
4133                                 mapped_sdev_id = sdev->id;
4134
4135                                 if (sdev->id > adapter->init_id) {
4136                                         mapped_sdev_id -= 1;
4137                                 }
4138
4139                                 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4140
4141                                         scsi_id = sdev->id;
4142
4143                                         logical_drv = i;
4144
4145                                         ldid_map = raid_dev->curr_ldmap[i];
4146
4147                                         app_hndl = mraid_mm_adapter_app_handle(
4148                                                         adapter->unique_id);
4149
4150                                         break;
4151                                 }
4152                         }
4153                 }
4154                 else {
4155                         con_log(CL_ANN, (KERN_NOTICE
4156                                 "megaraid: sysfs get ld map failed: %x\n",
4157                                 rval));
4158                 }
4159         }
4160
4161         return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4162                         ldid_map, app_hndl);
4163 }
4164
4165
4166 /*
4167  * END: Mailbox Low Level Driver
4168  */
4169 module_init(megaraid_init);
4170 module_exit(megaraid_exit);
4171
4172 /* vim: set ts=8 sw=8 tw=78 ai si: */