Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

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

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us