[PATCH] PCI: Convert megaraid to use pci_driver shutdown method
[sfrench/cifs-2.6.git] / drivers / scsi / megaraid / megaraid_mbox.c
1 /*
2  *
3  *                      Linux MegaRAID device driver
4  *
5  * Copyright (c) 2003-2004  LSI Logic Corporation.
6  *
7  *         This program is free software; you can redistribute it and/or
8  *         modify it under the terms of the GNU General Public License
9  *         as published by the Free Software Foundation; either version
10  *         2 of the License, or (at your option) any later version.
11  *
12  * FILE         : megaraid_mbox.c
13  * Version      : v2.20.4.6 (Mar 07 2005)
14  *
15  * Authors:
16  *      Atul Mukker             <Atul.Mukker@lsil.com>
17  *      Sreenivas Bagalkote     <Sreenivas.Bagalkote@lsil.com>
18  *      Manoj Jose              <Manoj.Jose@lsil.com>
19  *
20  * List of supported controllers
21  *
22  * OEM  Product Name                    VID     DID     SSVID   SSID
23  * ---  ------------                    ---     ---     ----    ----
24  * Dell PERC3/QC                        101E    1960    1028    0471
25  * Dell PERC3/DC                        101E    1960    1028    0493
26  * Dell PERC3/SC                        101E    1960    1028    0475
27  * Dell PERC3/Di                        1028    1960    1028    0123
28  * Dell PERC4/SC                        1000    1960    1028    0520
29  * Dell PERC4/DC                        1000    1960    1028    0518
30  * Dell PERC4/QC                        1000    0407    1028    0531
31  * Dell PERC4/Di                        1028    000F    1028    014A
32  * Dell PERC 4e/Si                      1028    0013    1028    016c
33  * Dell PERC 4e/Di                      1028    0013    1028    016d
34  * Dell PERC 4e/Di                      1028    0013    1028    016e
35  * Dell PERC 4e/Di                      1028    0013    1028    016f
36  * Dell PERC 4e/Di                      1028    0013    1028    0170
37  * Dell PERC 4e/DC                      1000    0408    1028    0002
38  * Dell PERC 4e/SC                      1000    0408    1028    0001
39  *
40  *
41  * LSI MegaRAID SCSI 320-0              1000    1960    1000    A520
42  * LSI MegaRAID SCSI 320-1              1000    1960    1000    0520
43  * LSI MegaRAID SCSI 320-2              1000    1960    1000    0518
44  * LSI MegaRAID SCSI 320-0X             1000    0407    1000    0530
45  * LSI MegaRAID SCSI 320-2X             1000    0407    1000    0532
46  * LSI MegaRAID SCSI 320-4X             1000    0407    1000    0531
47  * LSI MegaRAID SCSI 320-1E             1000    0408    1000    0001
48  * LSI MegaRAID SCSI 320-2E             1000    0408    1000    0002
49  * LSI MegaRAID SATA 150-4              1000    1960    1000    4523
50  * LSI MegaRAID SATA 150-6              1000    1960    1000    0523
51  * LSI MegaRAID SATA 300-4X             1000    0409    1000    3004
52  * LSI MegaRAID SATA 300-8X             1000    0409    1000    3008
53  *
54  * INTEL RAID Controller SRCU42X        1000    0407    8086    0532
55  * INTEL RAID Controller SRCS16         1000    1960    8086    0523
56  * INTEL RAID Controller SRCU42E        1000    0408    8086    0002
57  * INTEL RAID Controller SRCZCRX        1000    0407    8086    0530
58  * INTEL RAID Controller SRCS28X        1000    0409    8086    3008
59  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3431
60  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3499
61  * INTEL RAID Controller SRCU51L        1000    1960    8086    0520
62  *
63  * FSC  MegaRAID PCI Express ROMB       1000    0408    1734    1065
64  *
65  * ACER MegaRAID ROMB-2E                1000    0408    1025    004D
66  *
67  * NEC  MegaRAID PCI Express ROMB       1000    0408    1033    8287
68  *
69  * For history of changes, see Documentation/ChangeLog.megaraid
70  */
71
72 #include "megaraid_mbox.h"
73
74 static int megaraid_init(void);
75 static void megaraid_exit(void);
76
77 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
78 static void megaraid_detach_one(struct pci_dev *);
79 static void megaraid_mbox_shutdown(struct pci_dev *);
80
81 static int megaraid_io_attach(adapter_t *);
82 static void megaraid_io_detach(adapter_t *);
83
84 static int megaraid_init_mbox(adapter_t *);
85 static void megaraid_fini_mbox(adapter_t *);
86
87 static int megaraid_alloc_cmd_packets(adapter_t *);
88 static void megaraid_free_cmd_packets(adapter_t *);
89
90 static int megaraid_mbox_setup_dma_pools(adapter_t *);
91 static void megaraid_mbox_teardown_dma_pools(adapter_t *);
92
93 static int megaraid_sysfs_alloc_resources(adapter_t *);
94 static void megaraid_sysfs_free_resources(adapter_t *);
95
96 static int megaraid_abort_handler(struct scsi_cmnd *);
97 static int megaraid_reset_handler(struct scsi_cmnd *);
98
99 static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
100 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
101 static int megaraid_busywait_mbox(mraid_device_t *);
102 static int megaraid_mbox_product_info(adapter_t *);
103 static int megaraid_mbox_extended_cdb(adapter_t *);
104 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
105 static int megaraid_mbox_support_random_del(adapter_t *);
106 static int megaraid_mbox_get_max_sg(adapter_t *);
107 static void megaraid_mbox_enum_raid_scsi(adapter_t *);
108 static void megaraid_mbox_flush_cache(adapter_t *);
109
110 static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
111 static void megaraid_mbox_setup_device_map(adapter_t *);
112
113 static int megaraid_queue_command(struct scsi_cmnd *,
114                 void (*)(struct scsi_cmnd *));
115 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
116 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
117 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
118                 struct scsi_cmnd *);
119 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
120                 struct scsi_cmnd *);
121
122 static irqreturn_t megaraid_isr(int, void *, struct pt_regs *);
123
124 static void megaraid_mbox_dpc(unsigned long);
125
126 static ssize_t megaraid_sysfs_show_app_hndl(struct class_device *, char *);
127 static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *);
128
129 static int megaraid_cmm_register(adapter_t *);
130 static int megaraid_cmm_unregister(adapter_t *);
131 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
132 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
133 static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
134 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
135 static int wait_till_fw_empty(adapter_t *);
136
137
138
139 MODULE_AUTHOR("LSI Logic Corporation");
140 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
141 MODULE_LICENSE("GPL");
142 MODULE_VERSION(MEGARAID_VERSION);
143
144 /*
145  * ### modules parameters for driver ###
146  */
147
148 /**
149  * Set to enable driver to expose unconfigured disk to kernel
150  */
151 static int megaraid_expose_unconf_disks = 0;
152 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
153 MODULE_PARM_DESC(unconf_disks,
154         "Set to expose unconfigured disks to kernel (default=0)");
155
156 /**
157  * driver wait time if the adapter's mailbox is busy
158  */
159 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
160 module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
161 MODULE_PARM_DESC(busy_wait,
162         "Max wait for mailbox in microseconds if busy (default=10)");
163
164 /**
165  * number of sectors per IO command
166  */
167 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
168 module_param_named(max_sectors, megaraid_max_sectors, int, 0);
169 MODULE_PARM_DESC(max_sectors,
170         "Maximum number of sectors per IO command (default=128)");
171
172 /**
173  * number of commands per logical unit
174  */
175 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
176 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
177 MODULE_PARM_DESC(cmd_per_lun,
178         "Maximum number of commands per logical unit (default=64)");
179
180
181 /**
182  * Fast driver load option, skip scanning for physical devices during load.
183  * This would result in non-disk devices being skipped during driver load
184  * time. These can be later added though, using /proc/scsi/scsi
185  */
186 static unsigned int megaraid_fast_load = 0;
187 module_param_named(fast_load, megaraid_fast_load, int, 0);
188 MODULE_PARM_DESC(fast_load,
189         "Faster loading of the driver, skips physical devices! (default=0)");
190
191
192 /**
193  * mraid_debug level - threshold for amount of information to be displayed by
194  * the driver. This level can be changed through modules parameters, ioctl or
195  * sysfs/proc interface. By default, print the announcement messages only.
196  */
197 int mraid_debug_level = CL_ANN;
198 module_param_named(debug_level, mraid_debug_level, int, 0);
199 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
200
201 /*
202  * ### global data ###
203  */
204 static uint8_t megaraid_mbox_version[8] =
205         { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 };
206
207
208 /*
209  * PCI table for all supported controllers.
210  */
211 static struct pci_device_id pci_id_table_g[] =  {
212         {
213                 PCI_VENDOR_ID_DELL,
214                 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
215                 PCI_VENDOR_ID_DELL,
216                 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
217         },
218         {
219                 PCI_VENDOR_ID_LSI_LOGIC,
220                 PCI_DEVICE_ID_PERC4_SC,
221                 PCI_VENDOR_ID_DELL,
222                 PCI_SUBSYS_ID_PERC4_SC,
223         },
224         {
225                 PCI_VENDOR_ID_LSI_LOGIC,
226                 PCI_DEVICE_ID_PERC4_DC,
227                 PCI_VENDOR_ID_DELL,
228                 PCI_SUBSYS_ID_PERC4_DC,
229         },
230         {
231                 PCI_VENDOR_ID_LSI_LOGIC,
232                 PCI_DEVICE_ID_VERDE,
233                 PCI_ANY_ID,
234                 PCI_ANY_ID,
235         },
236         {
237                 PCI_VENDOR_ID_DELL,
238                 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
239                 PCI_VENDOR_ID_DELL,
240                 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
241         },
242         {
243                 PCI_VENDOR_ID_DELL,
244                 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
245                 PCI_VENDOR_ID_DELL,
246                 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
247         },
248         {
249                 PCI_VENDOR_ID_DELL,
250                 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
251                 PCI_VENDOR_ID_DELL,
252                 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
253         },
254         {
255                 PCI_VENDOR_ID_DELL,
256                 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
257                 PCI_VENDOR_ID_DELL,
258                 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
259         },
260         {
261                 PCI_VENDOR_ID_DELL,
262                 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
263                 PCI_VENDOR_ID_DELL,
264                 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
265         },
266         {
267                 PCI_VENDOR_ID_DELL,
268                 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
269                 PCI_VENDOR_ID_DELL,
270                 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
271         },
272         {
273                 PCI_VENDOR_ID_LSI_LOGIC,
274                 PCI_DEVICE_ID_DOBSON,
275                 PCI_ANY_ID,
276                 PCI_ANY_ID,
277         },
278         {
279                 PCI_VENDOR_ID_AMI,
280                 PCI_DEVICE_ID_AMI_MEGARAID3,
281                 PCI_VENDOR_ID_DELL,
282                 PCI_SUBSYS_ID_PERC3_QC,
283         },
284         {
285                 PCI_VENDOR_ID_AMI,
286                 PCI_DEVICE_ID_AMI_MEGARAID3,
287                 PCI_VENDOR_ID_DELL,
288                 PCI_SUBSYS_ID_PERC3_DC,
289         },
290         {
291                 PCI_VENDOR_ID_AMI,
292                 PCI_DEVICE_ID_AMI_MEGARAID3,
293                 PCI_VENDOR_ID_DELL,
294                 PCI_SUBSYS_ID_PERC3_SC,
295         },
296         {
297                 PCI_VENDOR_ID_AMI,
298                 PCI_DEVICE_ID_AMI_MEGARAID3,
299                 PCI_VENDOR_ID_AMI,
300                 PCI_SUBSYS_ID_PERC3_SC,
301         },
302         {
303                 PCI_VENDOR_ID_AMI,
304                 PCI_DEVICE_ID_AMI_MEGARAID3,
305                 PCI_VENDOR_ID_AMI,
306                 PCI_SUBSYS_ID_PERC3_DC,
307         },
308         {
309                 PCI_VENDOR_ID_LSI_LOGIC,
310                 PCI_DEVICE_ID_MEGARAID_SCSI_320_0,
311                 PCI_VENDOR_ID_LSI_LOGIC,
312                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_0,
313         },
314         {
315                 PCI_VENDOR_ID_LSI_LOGIC,
316                 PCI_DEVICE_ID_MEGARAID_SCSI_320_1,
317                 PCI_VENDOR_ID_LSI_LOGIC,
318                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_1,
319         },
320         {
321                 PCI_VENDOR_ID_LSI_LOGIC,
322                 PCI_DEVICE_ID_MEGARAID_SCSI_320_2,
323                 PCI_VENDOR_ID_LSI_LOGIC,
324                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_2,
325         },
326         {
327                 PCI_VENDOR_ID_LSI_LOGIC,
328                 PCI_DEVICE_ID_MEGARAID_I4_133_RAID,
329                 PCI_VENDOR_ID_LSI_LOGIC,
330                 PCI_SUBSYS_ID_MEGARAID_I4_133_RAID,
331         },
332         {
333                 PCI_VENDOR_ID_LSI_LOGIC,
334                 PCI_DEVICE_ID_MEGARAID_SATA_150_4,
335                 PCI_VENDOR_ID_LSI_LOGIC,
336                 PCI_SUBSYS_ID_MEGARAID_SATA_150_4,
337         },
338         {
339                 PCI_VENDOR_ID_LSI_LOGIC,
340                 PCI_DEVICE_ID_MEGARAID_SATA_150_6,
341                 PCI_VENDOR_ID_LSI_LOGIC,
342                 PCI_SUBSYS_ID_MEGARAID_SATA_150_6,
343         },
344         {
345                 PCI_VENDOR_ID_LSI_LOGIC,
346                 PCI_DEVICE_ID_LINDSAY,
347                 PCI_ANY_ID,
348                 PCI_ANY_ID,
349         },
350         {
351                 PCI_VENDOR_ID_LSI_LOGIC,
352                 PCI_DEVICE_ID_INTEL_RAID_SRCS16,
353                 PCI_VENDOR_ID_INTEL,
354                 PCI_SUBSYS_ID_INTEL_RAID_SRCS16,
355         },
356         {
357                 PCI_VENDOR_ID_LSI_LOGIC,
358                 PCI_DEVICE_ID_INTEL_RAID_SRCU41L_LAKE_SHETEK,
359                 PCI_VENDOR_ID_INTEL,
360                 PCI_SUBSYS_ID_INTEL_RAID_SRCU41L_LAKE_SHETEK,
361         },
362         {0}     /* Terminating entry */
363 };
364 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
365
366
367 static struct pci_driver megaraid_pci_driver_g = {
368         .name           = "megaraid",
369         .id_table       = pci_id_table_g,
370         .probe          = megaraid_probe_one,
371         .remove         = __devexit_p(megaraid_detach_one),
372         .shutdown       = megaraid_mbox_shutdown,
373 };
374
375
376
377 // definitions for the device attributes for exporting logical drive number
378 // for a scsi address (Host, Channel, Id, Lun)
379
380 CLASS_DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
381                 NULL);
382
383 // Host template initializer for megaraid mbox sysfs device attributes
384 static struct class_device_attribute *megaraid_shost_attrs[] = {
385         &class_device_attr_megaraid_mbox_app_hndl,
386         NULL,
387 };
388
389
390 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
391
392 // Host template initializer for megaraid mbox sysfs device attributes
393 static struct device_attribute *megaraid_sdev_attrs[] = {
394         &dev_attr_megaraid_mbox_ld,
395         NULL,
396 };
397
398
399 /*
400  * Scsi host template for megaraid unified driver
401  */
402 static struct scsi_host_template megaraid_template_g = {
403         .module                         = THIS_MODULE,
404         .name                           = "LSI Logic MegaRAID driver",
405         .proc_name                      = "megaraid",
406         .queuecommand                   = megaraid_queue_command,
407         .eh_abort_handler               = megaraid_abort_handler,
408         .eh_device_reset_handler        = megaraid_reset_handler,
409         .eh_bus_reset_handler           = megaraid_reset_handler,
410         .eh_host_reset_handler          = megaraid_reset_handler,
411         .use_clustering                 = ENABLE_CLUSTERING,
412         .sdev_attrs                     = megaraid_sdev_attrs,
413         .shost_attrs                    = megaraid_shost_attrs,
414 };
415
416
417 /**
418  * megaraid_init - module load hook
419  *
420  * We register ourselves as hotplug enabled module and let PCI subsystem
421  * discover our adaters
422  **/
423 static int __init
424 megaraid_init(void)
425 {
426         int     rval;
427
428         // Announce the driver version
429         con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
430                 MEGARAID_EXT_VERSION));
431
432         // check validity of module parameters
433         if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
434
435                 con_log(CL_ANN, (KERN_WARNING
436                         "megaraid mailbox: max commands per lun reset to %d\n",
437                         MBOX_MAX_SCSI_CMDS));
438
439                 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
440         }
441
442
443         // register as a PCI hot-plug driver module
444         rval = pci_register_driver(&megaraid_pci_driver_g);
445         if (rval < 0) {
446                 con_log(CL_ANN, (KERN_WARNING
447                         "megaraid: could not register hotplug support.\n"));
448         }
449
450         return rval;
451 }
452
453
454 /**
455  * megaraid_exit - driver unload entry point
456  *
457  * We simply unwrap the megaraid_init routine here
458  */
459 static void __exit
460 megaraid_exit(void)
461 {
462         con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
463
464         // unregister as PCI hotplug driver
465         pci_unregister_driver(&megaraid_pci_driver_g);
466
467         return;
468 }
469
470
471 /**
472  * megaraid_probe_one - PCI hotplug entry point
473  * @param pdev  : handle to this controller's PCI configuration space
474  * @param id    : pci device id of the class of controllers
475  *
476  * This routine should be called whenever a new adapter is detected by the
477  * PCI hotplug susbsytem.
478  **/
479 static int __devinit
480 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
481 {
482         adapter_t       *adapter;
483
484
485         // detected a new controller
486         con_log(CL_ANN, (KERN_INFO
487                 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
488                 pdev->vendor, pdev->device, pdev->subsystem_vendor,
489                 pdev->subsystem_device));
490
491         con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
492                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
493
494         if (pci_enable_device(pdev)) {
495                 con_log(CL_ANN, (KERN_WARNING
496                                 "megaraid: pci_enable_device failed\n"));
497
498                 return -ENODEV;
499         }
500
501         // Enable bus-mastering on this controller
502         pci_set_master(pdev);
503
504         // Allocate the per driver initialization structure
505         adapter = kmalloc(sizeof(adapter_t), GFP_KERNEL);
506
507         if (adapter == NULL) {
508                 con_log(CL_ANN, (KERN_WARNING
509                 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__));
510
511                 goto out_probe_one;
512         }
513         memset(adapter, 0, sizeof(adapter_t));
514
515
516         // set up PCI related soft state and other pre-known parameters
517         adapter->unique_id      = pdev->bus->number << 8 | pdev->devfn;
518         adapter->irq            = pdev->irq;
519         adapter->pdev           = pdev;
520
521         atomic_set(&adapter->being_detached, 0);
522
523         // Setup the default DMA mask. This would be changed later on
524         // depending on hardware capabilities
525         if (pci_set_dma_mask(adapter->pdev, DMA_32BIT_MASK) != 0) {
526
527                 con_log(CL_ANN, (KERN_WARNING
528                         "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
529
530                 goto out_free_adapter;
531         }
532
533
534         // Initialize the synchronization lock for kernel and LLD
535         spin_lock_init(&adapter->lock);
536         adapter->host_lock = &adapter->lock;
537
538
539         // Initialize the command queues: the list of free SCBs and the list
540         // of pending SCBs.
541         INIT_LIST_HEAD(&adapter->kscb_pool);
542         spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
543
544         INIT_LIST_HEAD(&adapter->pend_list);
545         spin_lock_init(PENDING_LIST_LOCK(adapter));
546
547         INIT_LIST_HEAD(&adapter->completed_list);
548         spin_lock_init(COMPLETED_LIST_LOCK(adapter));
549
550
551         // Start the mailbox based controller
552         if (megaraid_init_mbox(adapter) != 0) {
553                 con_log(CL_ANN, (KERN_WARNING
554                         "megaraid: maibox adapter did not initialize\n"));
555
556                 goto out_free_adapter;
557         }
558
559         // Register with LSI Common Management Module
560         if (megaraid_cmm_register(adapter) != 0) {
561
562                 con_log(CL_ANN, (KERN_WARNING
563                 "megaraid: could not register with management module\n"));
564
565                 goto out_fini_mbox;
566         }
567
568         // setup adapter handle in PCI soft state
569         pci_set_drvdata(pdev, adapter);
570
571         // attach with scsi mid-layer
572         if (megaraid_io_attach(adapter) != 0) {
573
574                 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
575
576                 goto out_cmm_unreg;
577         }
578
579         return 0;
580
581 out_cmm_unreg:
582         pci_set_drvdata(pdev, NULL);
583         megaraid_cmm_unregister(adapter);
584 out_fini_mbox:
585         megaraid_fini_mbox(adapter);
586 out_free_adapter:
587         kfree(adapter);
588 out_probe_one:
589         pci_disable_device(pdev);
590
591         return -ENODEV;
592 }
593
594
595 /**
596  * megaraid_detach_one - release the framework resources and call LLD release
597  * routine
598  * @param pdev  : handle for our PCI cofiguration space
599  *
600  * This routine is called during driver unload. We free all the allocated
601  * resources and call the corresponding LLD so that it can also release all
602  * its resources.
603  *
604  * This routine is also called from the PCI hotplug system
605  **/
606 static void
607 megaraid_detach_one(struct pci_dev *pdev)
608 {
609         adapter_t               *adapter;
610         struct Scsi_Host        *host;
611
612
613         // Start a rollback on this adapter
614         adapter = pci_get_drvdata(pdev);
615
616         if (!adapter) {
617                 con_log(CL_ANN, (KERN_CRIT
618                 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
619                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
620                         pdev->subsystem_device));
621
622                 return;
623         }
624         else {
625                 con_log(CL_ANN, (KERN_NOTICE
626                 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
627                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
628                         pdev->subsystem_device));
629         }
630
631
632         host = adapter->host;
633
634         // do not allow any more requests from the management module for this
635         // adapter.
636         // FIXME: How do we account for the request which might still be
637         // pending with us?
638         atomic_set(&adapter->being_detached, 1);
639
640         // detach from the IO sub-system
641         megaraid_io_detach(adapter);
642
643         // reset the device state in the PCI structure. We check this
644         // condition when we enter here. If the device state is NULL,
645         // that would mean the device has already been removed
646         pci_set_drvdata(pdev, NULL);
647
648         // Unregister from common management module
649         //
650         // FIXME: this must return success or failure for conditions if there
651         // is a command pending with LLD or not.
652         megaraid_cmm_unregister(adapter);
653
654         // finalize the mailbox based controller and release all resources
655         megaraid_fini_mbox(adapter);
656
657         kfree(adapter);
658
659         scsi_host_put(host);
660
661         pci_disable_device(pdev);
662
663         return;
664 }
665
666
667 /**
668  * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
669  * @param device        : generice driver model device
670  *
671  * Shutdown notification, perform flush cache
672  */
673 static void
674 megaraid_mbox_shutdown(struct pci_dev *pdev)
675 {
676         adapter_t               *adapter = pci_get_drvdata(pdev);
677         static int              counter;
678
679         if (!adapter) {
680                 con_log(CL_ANN, (KERN_WARNING
681                         "megaraid: null device in shutdown\n"));
682                 return;
683         }
684
685         // flush caches now
686         con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
687                 counter++));
688
689         megaraid_mbox_flush_cache(adapter);
690
691         con_log(CL_ANN, ("done\n"));
692 }
693
694
695 /**
696  * megaraid_io_attach - attach a device with the IO subsystem
697  * @param adapter       : controller's soft state
698  *
699  * Attach this device with the IO subsystem
700  **/
701 static int
702 megaraid_io_attach(adapter_t *adapter)
703 {
704         struct Scsi_Host        *host;
705
706         // Initialize SCSI Host structure
707         host = scsi_host_alloc(&megaraid_template_g, 8);
708         if (!host) {
709                 con_log(CL_ANN, (KERN_WARNING
710                         "megaraid mbox: scsi_register failed\n"));
711
712                 return -1;
713         }
714
715         SCSIHOST2ADAP(host)     = (caddr_t)adapter;
716         adapter->host           = host;
717
718         // export the parameters required by the mid-layer
719         scsi_assign_lock(host, adapter->host_lock);
720
721         host->irq               = adapter->irq;
722         host->unique_id         = adapter->unique_id;
723         host->can_queue         = adapter->max_cmds;
724         host->this_id           = adapter->init_id;
725         host->sg_tablesize      = adapter->sglen;
726         host->max_sectors       = adapter->max_sectors;
727         host->cmd_per_lun       = adapter->cmd_per_lun;
728         host->max_channel       = adapter->max_channel;
729         host->max_id            = adapter->max_target;
730         host->max_lun           = adapter->max_lun;
731
732
733         // notify mid-layer about the new controller
734         if (scsi_add_host(host, &adapter->pdev->dev)) {
735
736                 con_log(CL_ANN, (KERN_WARNING
737                         "megaraid mbox: scsi_add_host failed\n"));
738
739                 scsi_host_put(host);
740
741                 return -1;
742         }
743
744         scsi_scan_host(host);
745
746         return 0;
747 }
748
749
750 /**
751  * megaraid_io_detach - detach a device from the IO subsystem
752  * @param adapter       : controller's soft state
753  *
754  * Detach this device from the IO subsystem
755  **/
756 static void
757 megaraid_io_detach(adapter_t *adapter)
758 {
759         struct Scsi_Host        *host;
760
761         con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
762
763         host = adapter->host;
764
765         scsi_remove_host(host);
766
767         return;
768 }
769
770
771 /*
772  * START: Mailbox Low Level Driver
773  *
774  * This is section specific to the single mailbox based controllers
775  */
776
777 /**
778  * megaraid_init_mbox - initialize controller
779  * @param adapter       - our soft state
780  *
781  * . Allocate 16-byte aligned mailbox memory for firmware handshake
782  * . Allocate controller's memory resources
783  * . Find out all initialization data
784  * . Allocate memory required for all the commands
785  * . Use internal library of FW routines, build up complete soft state
786  */
787 static int __init
788 megaraid_init_mbox(adapter_t *adapter)
789 {
790         struct pci_dev          *pdev;
791         mraid_device_t          *raid_dev;
792         int                     i;
793
794
795         adapter->ito    = MBOX_TIMEOUT;
796         pdev            = adapter->pdev;
797
798         /*
799          * Allocate and initialize the init data structure for mailbox
800          * controllers
801          */
802         raid_dev = kmalloc(sizeof(mraid_device_t), GFP_KERNEL);
803         if (raid_dev == NULL) return -1;
804
805         memset(raid_dev, 0, sizeof(mraid_device_t));
806
807         /*
808          * Attach the adapter soft state to raid device soft state
809          */
810         adapter->raid_device    = (caddr_t)raid_dev;
811         raid_dev->fast_load     = megaraid_fast_load;
812
813
814         // our baseport
815         raid_dev->baseport = pci_resource_start(pdev, 0);
816
817         if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
818
819                 con_log(CL_ANN, (KERN_WARNING
820                                 "megaraid: mem region busy\n"));
821
822                 goto out_free_raid_dev;
823         }
824
825         raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
826
827         if (!raid_dev->baseaddr) {
828
829                 con_log(CL_ANN, (KERN_WARNING
830                         "megaraid: could not map hba memory\n") );
831
832                 goto out_release_regions;
833         }
834
835         //
836         // Setup the rest of the soft state using the library of FW routines
837         //
838
839         // request IRQ and register the interrupt service routine
840         if (request_irq(adapter->irq, megaraid_isr, SA_SHIRQ, "megaraid",
841                 adapter)) {
842
843                 con_log(CL_ANN, (KERN_WARNING
844                         "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
845
846                 goto out_iounmap;
847         }
848
849
850         // initialize the mutual exclusion lock for the mailbox
851         spin_lock_init(&raid_dev->mailbox_lock);
852
853         // allocate memory required for commands
854         if (megaraid_alloc_cmd_packets(adapter) != 0) {
855                 goto out_free_irq;
856         }
857
858         // Product info
859         if (megaraid_mbox_product_info(adapter) != 0) {
860                 goto out_alloc_cmds;
861         }
862
863         // Do we support extended CDBs
864         adapter->max_cdb_sz = 10;
865         if (megaraid_mbox_extended_cdb(adapter) == 0) {
866                 adapter->max_cdb_sz = 16;
867         }
868
869         /*
870          * Do we support cluster environment, if we do, what is the initiator
871          * id.
872          * NOTE: In a non-cluster aware firmware environment, the LLD should
873          * return 7 as initiator id.
874          */
875         adapter->ha             = 0;
876         adapter->init_id        = -1;
877         if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
878                 adapter->ha = 1;
879         }
880
881         /*
882          * Prepare the device ids array to have the mapping between the kernel
883          * device address and megaraid device address.
884          * We export the physical devices on their actual addresses. The
885          * logical drives are exported on a virtual SCSI channel
886          */
887         megaraid_mbox_setup_device_map(adapter);
888
889         // If the firmware supports random deletion, update the device id map
890         if (megaraid_mbox_support_random_del(adapter)) {
891
892                 // Change the logical drives numbers in device_ids array one
893                 // slot in device_ids is reserved for target id, that's why
894                 // "<=" below
895                 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
896                         adapter->device_ids[adapter->max_channel][i] += 0x80;
897                 }
898                 adapter->device_ids[adapter->max_channel][adapter->init_id] =
899                         0xFF;
900
901                 raid_dev->random_del_supported = 1;
902         }
903
904         /*
905          * find out the maximum number of scatter-gather elements supported by
906          * this firmware
907          */
908         adapter->sglen = megaraid_mbox_get_max_sg(adapter);
909
910         // enumerate RAID and SCSI channels so that all devices on SCSI
911         // channels can later be exported, including disk devices
912         megaraid_mbox_enum_raid_scsi(adapter);
913
914         /*
915          * Other parameters required by upper layer
916          *
917          * maximum number of sectors per IO command
918          */
919         adapter->max_sectors = megaraid_max_sectors;
920
921         /*
922          * number of queued commands per LUN.
923          */
924         adapter->cmd_per_lun = megaraid_cmd_per_lun;
925
926         /*
927          * Allocate resources required to issue FW calls, when sysfs is
928          * accessed
929          */
930         if (megaraid_sysfs_alloc_resources(adapter) != 0) {
931                 goto out_alloc_cmds;
932         }
933
934         // Set the DMA mask to 64-bit. All supported controllers as capable of
935         // DMA in this range
936         if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK) != 0) {
937
938                 con_log(CL_ANN, (KERN_WARNING
939                         "megaraid: could not set DMA mask for 64-bit.\n"));
940
941                 goto out_free_sysfs_res;
942         }
943
944         // setup tasklet for DPC
945         tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
946                         (unsigned long)adapter);
947
948         con_log(CL_DLEVEL1, (KERN_INFO
949                 "megaraid mbox hba successfully initialized\n"));
950
951         return 0;
952
953 out_free_sysfs_res:
954         megaraid_sysfs_free_resources(adapter);
955 out_alloc_cmds:
956         megaraid_free_cmd_packets(adapter);
957 out_free_irq:
958         free_irq(adapter->irq, adapter);
959 out_iounmap:
960         iounmap(raid_dev->baseaddr);
961 out_release_regions:
962         pci_release_regions(pdev);
963 out_free_raid_dev:
964         kfree(raid_dev);
965
966         return -1;
967 }
968
969
970 /**
971  * megaraid_fini_mbox - undo controller initialization
972  * @param adapter       : our soft state
973  */
974 static void
975 megaraid_fini_mbox(adapter_t *adapter)
976 {
977         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
978
979         // flush all caches
980         megaraid_mbox_flush_cache(adapter);
981
982         tasklet_kill(&adapter->dpc_h);
983
984         megaraid_sysfs_free_resources(adapter);
985
986         megaraid_free_cmd_packets(adapter);
987
988         free_irq(adapter->irq, adapter);
989
990         iounmap(raid_dev->baseaddr);
991
992         pci_release_regions(adapter->pdev);
993
994         kfree(raid_dev);
995
996         return;
997 }
998
999
1000 /**
1001  * megaraid_alloc_cmd_packets - allocate shared mailbox
1002  * @param adapter       : soft state of the raid controller
1003  *
1004  * Allocate and align the shared mailbox. This maibox is used to issue
1005  * all the commands. For IO based controllers, the mailbox is also regsitered
1006  * with the FW. Allocate memory for all commands as well.
1007  * This is our big allocator
1008  */
1009 static int
1010 megaraid_alloc_cmd_packets(adapter_t *adapter)
1011 {
1012         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1013         struct pci_dev          *pdev;
1014         unsigned long           align;
1015         scb_t                   *scb;
1016         mbox_ccb_t              *ccb;
1017         struct mraid_pci_blk    *epthru_pci_blk;
1018         struct mraid_pci_blk    *sg_pci_blk;
1019         struct mraid_pci_blk    *mbox_pci_blk;
1020         int                     i;
1021
1022         pdev = adapter->pdev;
1023
1024         /*
1025          * Setup the mailbox
1026          * Allocate the common 16-byte aligned memory for the handshake
1027          * mailbox.
1028          */
1029         raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
1030                         sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
1031
1032         if (!raid_dev->una_mbox64) {
1033                 con_log(CL_ANN, (KERN_WARNING
1034                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1035                         __LINE__));
1036                 return -1;
1037         }
1038         memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
1039
1040         /*
1041          * Align the mailbox at 16-byte boundary
1042          */
1043         raid_dev->mbox  = &raid_dev->una_mbox64->mbox32;
1044
1045         raid_dev->mbox  = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
1046                                 (~0UL ^ 0xFUL));
1047
1048         raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
1049
1050         align = ((void *)raid_dev->mbox -
1051                         ((void *)&raid_dev->una_mbox64->mbox32));
1052
1053         raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1054                         align;
1055
1056         // Allocate memory for commands issued internally
1057         adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
1058                                 &adapter->ibuf_dma_h);
1059         if (!adapter->ibuf) {
1060
1061                 con_log(CL_ANN, (KERN_WARNING
1062                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1063                         __LINE__));
1064
1065                 goto out_free_common_mbox;
1066         }
1067         memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
1068
1069         // Allocate memory for our SCSI Command Blocks and their associated
1070         // memory
1071
1072         /*
1073          * Allocate memory for the base list of scb. Later allocate memory for
1074          * CCBs and embedded components of each CCB and point the pointers in
1075          * scb to the allocated components
1076          * NOTE: The code to allocate SCB will be duplicated in all the LLD
1077          * since the calling routine does not yet know the number of available
1078          * commands.
1079          */
1080         adapter->kscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_SCSI_CMDS,
1081                         GFP_KERNEL);
1082
1083         if (adapter->kscb_list == NULL) {
1084                 con_log(CL_ANN, (KERN_WARNING
1085                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1086                         __LINE__));
1087                 goto out_free_ibuf;
1088         }
1089         memset(adapter->kscb_list, 0, sizeof(scb_t) * MBOX_MAX_SCSI_CMDS);
1090
1091         // memory allocation for our command packets
1092         if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1093                 con_log(CL_ANN, (KERN_WARNING
1094                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1095                         __LINE__));
1096                 goto out_free_scb_list;
1097         }
1098
1099         // Adjust the scb pointers and link in the free pool
1100         epthru_pci_blk  = raid_dev->epthru_pool;
1101         sg_pci_blk      = raid_dev->sg_pool;
1102         mbox_pci_blk    = raid_dev->mbox_pool;
1103
1104         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1105                 scb                     = adapter->kscb_list + i;
1106                 ccb                     = raid_dev->ccb_list + i;
1107
1108                 ccb->mbox       = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1109                 ccb->raw_mbox   = (uint8_t *)ccb->mbox;
1110                 ccb->mbox64     = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1111                 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1112
1113                 // make sure the mailbox is aligned properly
1114                 if (ccb->mbox_dma_h & 0x0F) {
1115                         con_log(CL_ANN, (KERN_CRIT
1116                                 "megaraid mbox: not aligned on 16-bytes\n"));
1117
1118                         goto out_teardown_dma_pools;
1119                 }
1120
1121                 ccb->epthru             = (mraid_epassthru_t *)
1122                                                 epthru_pci_blk[i].vaddr;
1123                 ccb->epthru_dma_h       = epthru_pci_blk[i].dma_addr;
1124                 ccb->pthru              = (mraid_passthru_t *)ccb->epthru;
1125                 ccb->pthru_dma_h        = ccb->epthru_dma_h;
1126
1127
1128                 ccb->sgl64              = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1129                 ccb->sgl_dma_h          = sg_pci_blk[i].dma_addr;
1130                 ccb->sgl32              = (mbox_sgl32 *)ccb->sgl64;
1131
1132                 scb->ccb                = (caddr_t)ccb;
1133                 scb->gp                 = 0;
1134
1135                 scb->sno                = i;    // command index
1136
1137                 scb->scp                = NULL;
1138                 scb->state              = SCB_FREE;
1139                 scb->dma_direction      = PCI_DMA_NONE;
1140                 scb->dma_type           = MRAID_DMA_NONE;
1141                 scb->dev_channel        = -1;
1142                 scb->dev_target         = -1;
1143
1144                 // put scb in the free pool
1145                 list_add_tail(&scb->list, &adapter->kscb_pool);
1146         }
1147
1148         return 0;
1149
1150 out_teardown_dma_pools:
1151         megaraid_mbox_teardown_dma_pools(adapter);
1152 out_free_scb_list:
1153         kfree(adapter->kscb_list);
1154 out_free_ibuf:
1155         pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1156                 adapter->ibuf_dma_h);
1157 out_free_common_mbox:
1158         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1159                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1160
1161         return -1;
1162 }
1163
1164
1165 /**
1166  * megaraid_free_cmd_packets - free memory
1167  * @param adapter       : soft state of the raid controller
1168  *
1169  * Release memory resources allocated for commands
1170  */
1171 static void
1172 megaraid_free_cmd_packets(adapter_t *adapter)
1173 {
1174         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1175
1176         megaraid_mbox_teardown_dma_pools(adapter);
1177
1178         kfree(adapter->kscb_list);
1179
1180         pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1181                 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1182
1183         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1184                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1185         return;
1186 }
1187
1188
1189 /**
1190  * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1191  * @param adapter       : HBA soft state
1192  *
1193  * setup the dma pools for mailbox, passthru and extended passthru structures,
1194  * and scatter-gather lists
1195  */
1196 static int
1197 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1198 {
1199         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1200         struct mraid_pci_blk    *epthru_pci_blk;
1201         struct mraid_pci_blk    *sg_pci_blk;
1202         struct mraid_pci_blk    *mbox_pci_blk;
1203         int                     i;
1204
1205
1206
1207         // Allocate memory for 16-bytes aligned mailboxes
1208         raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1209                                                 adapter->pdev,
1210                                                 sizeof(mbox64_t) + 16,
1211                                                 16, 0);
1212
1213         if (raid_dev->mbox_pool_handle == NULL) {
1214                 goto fail_setup_dma_pool;
1215         }
1216
1217         mbox_pci_blk = raid_dev->mbox_pool;
1218         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1219                 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1220                                                 raid_dev->mbox_pool_handle,
1221                                                 GFP_KERNEL,
1222                                                 &mbox_pci_blk[i].dma_addr);
1223                 if (!mbox_pci_blk[i].vaddr) {
1224                         goto fail_setup_dma_pool;
1225                 }
1226         }
1227
1228         /*
1229          * Allocate memory for each embedded passthru strucuture pointer
1230          * Request for a 128 bytes aligned structure for each passthru command
1231          * structure
1232          * Since passthru and extended passthru commands are exclusive, they
1233          * share common memory pool. Passthru structures piggyback on memory
1234          * allocted to extended passthru since passthru is smaller of the two
1235          */
1236         raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1237                         adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1238
1239         if (raid_dev->epthru_pool_handle == NULL) {
1240                 goto fail_setup_dma_pool;
1241         }
1242
1243         epthru_pci_blk = raid_dev->epthru_pool;
1244         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1245                 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1246                                                 raid_dev->epthru_pool_handle,
1247                                                 GFP_KERNEL,
1248                                                 &epthru_pci_blk[i].dma_addr);
1249                 if (!epthru_pci_blk[i].vaddr) {
1250                         goto fail_setup_dma_pool;
1251                 }
1252         }
1253
1254
1255         // Allocate memory for each scatter-gather list. Request for 512 bytes
1256         // alignment for each sg list
1257         raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1258                                         adapter->pdev,
1259                                         sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1260                                         512, 0);
1261
1262         if (raid_dev->sg_pool_handle == NULL) {
1263                 goto fail_setup_dma_pool;
1264         }
1265
1266         sg_pci_blk = raid_dev->sg_pool;
1267         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1268                 sg_pci_blk[i].vaddr = pci_pool_alloc(
1269                                                 raid_dev->sg_pool_handle,
1270                                                 GFP_KERNEL,
1271                                                 &sg_pci_blk[i].dma_addr);
1272                 if (!sg_pci_blk[i].vaddr) {
1273                         goto fail_setup_dma_pool;
1274                 }
1275         }
1276
1277         return 0;
1278
1279 fail_setup_dma_pool:
1280         megaraid_mbox_teardown_dma_pools(adapter);
1281         return -1;
1282 }
1283
1284
1285 /**
1286  * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1287  * @param adapter       : HBA soft state
1288  *
1289  * teardown the dma pool for mailbox, passthru and extended passthru
1290  * structures, and scatter-gather lists
1291  */
1292 static void
1293 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1294 {
1295         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1296         struct mraid_pci_blk    *epthru_pci_blk;
1297         struct mraid_pci_blk    *sg_pci_blk;
1298         struct mraid_pci_blk    *mbox_pci_blk;
1299         int                     i;
1300
1301
1302         sg_pci_blk = raid_dev->sg_pool;
1303         for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1304                 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1305                         sg_pci_blk[i].dma_addr);
1306         }
1307         if (raid_dev->sg_pool_handle)
1308                 pci_pool_destroy(raid_dev->sg_pool_handle);
1309
1310
1311         epthru_pci_blk = raid_dev->epthru_pool;
1312         for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1313                 pci_pool_free(raid_dev->epthru_pool_handle,
1314                         epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1315         }
1316         if (raid_dev->epthru_pool_handle)
1317                 pci_pool_destroy(raid_dev->epthru_pool_handle);
1318
1319
1320         mbox_pci_blk = raid_dev->mbox_pool;
1321         for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1322                 pci_pool_free(raid_dev->mbox_pool_handle,
1323                         mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1324         }
1325         if (raid_dev->mbox_pool_handle)
1326                 pci_pool_destroy(raid_dev->mbox_pool_handle);
1327
1328         return;
1329 }
1330
1331
1332 /**
1333  * megaraid_alloc_scb - detach and return a scb from the free list
1334  * @adapter     : controller's soft state
1335  *
1336  * return the scb from the head of the free list. NULL if there are none
1337  * available
1338  **/
1339 static inline scb_t *
1340 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1341 {
1342         struct list_head        *head = &adapter->kscb_pool;
1343         scb_t                   *scb = NULL;
1344         unsigned long           flags;
1345
1346         // detach scb from free pool
1347         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1348
1349         if (list_empty(head)) {
1350                 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1351                 return NULL;
1352         }
1353
1354         scb = list_entry(head->next, scb_t, list);
1355         list_del_init(&scb->list);
1356
1357         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1358
1359         scb->state      = SCB_ACTIVE;
1360         scb->scp        = scp;
1361         scb->dma_type   = MRAID_DMA_NONE;
1362
1363         return scb;
1364 }
1365
1366
1367 /**
1368  * megaraid_dealloc_scb - return the scb to the free pool
1369  * @adapter     : controller's soft state
1370  * @scb         : scb to be freed
1371  *
1372  * return the scb back to the free list of scbs. The caller must 'flush' the
1373  * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1374  * NOTE NOTE: Make sure the scb is not on any list before calling this
1375  * routine.
1376  **/
1377 static inline void
1378 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1379 {
1380         unsigned long           flags;
1381
1382         // put scb in the free pool
1383         scb->state      = SCB_FREE;
1384         scb->scp        = NULL;
1385         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1386
1387         list_add(&scb->list, &adapter->kscb_pool);
1388
1389         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1390
1391         return;
1392 }
1393
1394
1395 /**
1396  * megaraid_mbox_mksgl - make the scatter-gather list
1397  * @adapter     - controller's soft state
1398  * @scb         - scsi control block
1399  *
1400  * prepare the scatter-gather list
1401  */
1402 static inline int
1403 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1404 {
1405         struct scatterlist      *sgl;
1406         mbox_ccb_t              *ccb;
1407         struct page             *page;
1408         unsigned long           offset;
1409         struct scsi_cmnd        *scp;
1410         int                     sgcnt;
1411         int                     i;
1412
1413
1414         scp     = scb->scp;
1415         ccb     = (mbox_ccb_t *)scb->ccb;
1416
1417         // no mapping required if no data to be transferred
1418         if (!scp->request_buffer || !scp->request_bufflen)
1419                 return 0;
1420
1421         if (!scp->use_sg) {     /* scatter-gather list not used */
1422
1423                 page = virt_to_page(scp->request_buffer);
1424
1425                 offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK);
1426
1427                 ccb->buf_dma_h = pci_map_page(adapter->pdev, page, offset,
1428                                                   scp->request_bufflen,
1429                                                   scb->dma_direction);
1430                 scb->dma_type = MRAID_DMA_WBUF;
1431
1432                 /*
1433                  * We need to handle special 64-bit commands that need a
1434                  * minimum of 1 SG
1435                  */
1436                 sgcnt = 1;
1437                 ccb->sgl64[0].address   = ccb->buf_dma_h;
1438                 ccb->sgl64[0].length    = scp->request_bufflen;
1439
1440                 return sgcnt;
1441         }
1442
1443         sgl = (struct scatterlist *)scp->request_buffer;
1444
1445         // The number of sg elements returned must not exceed our limit
1446         sgcnt = pci_map_sg(adapter->pdev, sgl, scp->use_sg,
1447                         scb->dma_direction);
1448
1449         if (sgcnt > adapter->sglen) {
1450                 con_log(CL_ANN, (KERN_CRIT
1451                         "megaraid critical: too many sg elements:%d\n",
1452                         sgcnt));
1453                 BUG();
1454         }
1455
1456         scb->dma_type = MRAID_DMA_WSG;
1457
1458         for (i = 0; i < sgcnt; i++, sgl++) {
1459                 ccb->sgl64[i].address   = sg_dma_address(sgl);
1460                 ccb->sgl64[i].length    = sg_dma_len(sgl);
1461         }
1462
1463         // Return count of SG nodes
1464         return sgcnt;
1465 }
1466
1467
1468 /**
1469  * mbox_post_cmd - issue a mailbox command
1470  * @adapter     - controller's soft state
1471  * @scb         - command to be issued
1472  *
1473  * post the command to the controller if mailbox is availble.
1474  */
1475 static inline int
1476 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1477 {
1478         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
1479         mbox64_t        *mbox64;
1480         mbox_t          *mbox;
1481         mbox_ccb_t      *ccb;
1482         unsigned long   flags;
1483         unsigned int    i = 0;
1484
1485
1486         ccb     = (mbox_ccb_t *)scb->ccb;
1487         mbox    = raid_dev->mbox;
1488         mbox64  = raid_dev->mbox64;
1489
1490         /*
1491          * Check for busy mailbox. If it is, return failure - the caller
1492          * should retry later.
1493          */
1494         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1495
1496         if (unlikely(mbox->busy)) {
1497                 do {
1498                         udelay(1);
1499                         i++;
1500                         rmb();
1501                 } while(mbox->busy && (i < max_mbox_busy_wait));
1502
1503                 if (mbox->busy) {
1504
1505                         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1506
1507                         return -1;
1508                 }
1509         }
1510
1511
1512         // Copy this command's mailbox data into "adapter's" mailbox
1513         memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1514         mbox->cmdid = scb->sno;
1515
1516         adapter->outstanding_cmds++;
1517
1518         if (scb->dma_direction == PCI_DMA_TODEVICE) {
1519                 if (!scb->scp->use_sg) {        // sg list not used
1520                         pci_dma_sync_single_for_device(adapter->pdev,
1521                                         ccb->buf_dma_h,
1522                                         scb->scp->request_bufflen,
1523                                         PCI_DMA_TODEVICE);
1524                 }
1525                 else {
1526                         pci_dma_sync_sg_for_device(adapter->pdev,
1527                                 scb->scp->request_buffer,
1528                                 scb->scp->use_sg, PCI_DMA_TODEVICE);
1529                 }
1530         }
1531
1532         mbox->busy      = 1;    // Set busy
1533         mbox->poll      = 0;
1534         mbox->ack       = 0;
1535         wmb();
1536
1537         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1538
1539         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1540
1541         return 0;
1542 }
1543
1544
1545 /**
1546  * megaraid_queue_command - generic queue entry point for all LLDs
1547  * @scp         : pointer to the scsi command to be executed
1548  * @done        : callback routine to be called after the cmd has be completed
1549  *
1550  * Queue entry point for mailbox based controllers.
1551  */
1552 static int
1553 megaraid_queue_command(struct scsi_cmnd *scp, void (* done)(struct scsi_cmnd *))
1554 {
1555         adapter_t       *adapter;
1556         scb_t           *scb;
1557         int             if_busy;
1558
1559         adapter         = SCP2ADAPTER(scp);
1560         scp->scsi_done  = done;
1561         scp->result     = 0;
1562
1563         assert_spin_locked(adapter->host_lock);
1564
1565         spin_unlock(adapter->host_lock);
1566
1567         /*
1568          * Allocate and build a SCB request
1569          * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1570          * not allocate scb. We will return non-zero status in that case.
1571          * NOTE: scb can be null even though certain commands completed
1572          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1573          * return 0 in that case, and we would do the callback right away.
1574          */
1575         if_busy = 0;
1576         scb     = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1577
1578         if (scb) {
1579                 megaraid_mbox_runpendq(adapter, scb);
1580         }
1581
1582         spin_lock(adapter->host_lock);
1583
1584         if (!scb) {     // command already completed
1585                 done(scp);
1586                 return 0;
1587         }
1588
1589         return if_busy;
1590 }
1591
1592
1593 /**
1594  * megaraid_mbox_build_cmd - transform the mid-layer scsi command to megaraid
1595  * firmware lingua
1596  * @adapter     - controller's soft state
1597  * @scp         - mid-layer scsi command pointer
1598  * @busy        - set if request could not be completed because of lack of
1599  *              resources
1600  *
1601  * convert the command issued by mid-layer to format understood by megaraid
1602  * firmware. We also complete certain command without sending them to firmware
1603  */
1604 static scb_t *
1605 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1606 {
1607         mraid_device_t          *rdev = ADAP2RAIDDEV(adapter);
1608         int                     channel;
1609         int                     target;
1610         int                     islogical;
1611         mbox_ccb_t              *ccb;
1612         mraid_passthru_t        *pthru;
1613         mbox64_t                *mbox64;
1614         mbox_t                  *mbox;
1615         scb_t                   *scb;
1616         char                    skip[] = "skipping";
1617         char                    scan[] = "scanning";
1618         char                    *ss;
1619
1620
1621         /*
1622          * Get the appropriate device map for the device this command is
1623          * intended for
1624          */
1625         MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1626
1627         /*
1628          * Logical drive commands
1629          */
1630         if (islogical) {
1631                 switch (scp->cmnd[0]) {
1632                 case TEST_UNIT_READY:
1633                         /*
1634                          * Do we support clustering and is the support enabled
1635                          * If no, return success always
1636                          */
1637                         if (!adapter->ha) {
1638                                 scp->result = (DID_OK << 16);
1639                                 return NULL;
1640                         }
1641
1642                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1643                                 scp->result = (DID_ERROR << 16);
1644                                 *busy = 1;
1645                                 return NULL;
1646                         }
1647
1648                         scb->dma_direction      = scp->sc_data_direction;
1649                         scb->dev_channel        = 0xFF;
1650                         scb->dev_target         = target;
1651                         ccb                     = (mbox_ccb_t *)scb->ccb;
1652
1653                         /*
1654                          * The command id will be provided by the command
1655                          * issuance routine
1656                          */
1657                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1658                         ccb->raw_mbox[2]        = RESERVATION_STATUS;
1659                         ccb->raw_mbox[3]        = target;
1660
1661                         return scb;
1662
1663                 case MODE_SENSE:
1664                         if (scp->use_sg) {
1665                                 struct scatterlist      *sgl;
1666                                 caddr_t                 vaddr;
1667
1668                                 sgl = (struct scatterlist *)scp->request_buffer;
1669                                 if (sgl->page) {
1670                                         vaddr = (caddr_t)
1671                                                 (page_address((&sgl[0])->page)
1672                                                 + (&sgl[0])->offset);
1673
1674                                         memset(vaddr, 0, scp->cmnd[4]);
1675                                 }
1676                                 else {
1677                                         con_log(CL_ANN, (KERN_WARNING
1678                                         "megaraid mailbox: invalid sg:%d\n",
1679                                         __LINE__));
1680                                 }
1681                         }
1682                         else {
1683                                 memset(scp->request_buffer, 0, scp->cmnd[4]);
1684                         }
1685                         scp->result = (DID_OK << 16);
1686                         return NULL;
1687
1688                 case INQUIRY:
1689                         /*
1690                          * Display the channel scan for logical drives
1691                          * Do not display scan for a channel if already done.
1692                          */
1693                         if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1694
1695                                 con_log(CL_ANN, (KERN_INFO
1696                                         "scsi[%d]: scanning scsi channel %d",
1697                                         adapter->host->host_no,
1698                                         SCP2CHANNEL(scp)));
1699
1700                                 con_log(CL_ANN, (
1701                                         " [virtual] for logical drives\n"));
1702
1703                                 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1704                         }
1705
1706                         /* Fall through */
1707
1708                 case READ_CAPACITY:
1709                         /*
1710                          * Do not allow LUN > 0 for logical drives and
1711                          * requests for more than 40 logical drives
1712                          */
1713                         if (SCP2LUN(scp)) {
1714                                 scp->result = (DID_BAD_TARGET << 16);
1715                                 return NULL;
1716                         }
1717                         if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1718                                 scp->result = (DID_BAD_TARGET << 16);
1719                                 return NULL;
1720                         }
1721
1722
1723                         /* Allocate a SCB and initialize passthru */
1724                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1725                                 scp->result = (DID_ERROR << 16);
1726                                 *busy = 1;
1727                                 return NULL;
1728                         }
1729
1730                         ccb                     = (mbox_ccb_t *)scb->ccb;
1731                         scb->dev_channel        = 0xFF;
1732                         scb->dev_target         = target;
1733                         pthru                   = ccb->pthru;
1734                         mbox                    = ccb->mbox;
1735                         mbox64                  = ccb->mbox64;
1736
1737                         pthru->timeout          = 0;
1738                         pthru->ars              = 1;
1739                         pthru->reqsenselen      = 14;
1740                         pthru->islogical        = 1;
1741                         pthru->logdrv           = target;
1742                         pthru->cdblen           = scp->cmd_len;
1743                         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1744
1745                         mbox->cmd               = MBOXCMD_PASSTHRU64;
1746                         scb->dma_direction      = scp->sc_data_direction;
1747
1748                         pthru->dataxferlen      = scp->request_bufflen;
1749                         pthru->dataxferaddr     = ccb->sgl_dma_h;
1750                         pthru->numsge           = megaraid_mbox_mksgl(adapter,
1751                                                         scb);
1752
1753                         mbox->xferaddr          = 0xFFFFFFFF;
1754                         mbox64->xferaddr_lo     = (uint32_t )ccb->pthru_dma_h;
1755                         mbox64->xferaddr_hi     = 0;
1756
1757                         return scb;
1758
1759                 case READ_6:
1760                 case WRITE_6:
1761                 case READ_10:
1762                 case WRITE_10:
1763                 case READ_12:
1764                 case WRITE_12:
1765
1766                         /*
1767                          * Allocate a SCB and initialize mailbox
1768                          */
1769                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1770                                 scp->result = (DID_ERROR << 16);
1771                                 *busy = 1;
1772                                 return NULL;
1773                         }
1774                         ccb                     = (mbox_ccb_t *)scb->ccb;
1775                         scb->dev_channel        = 0xFF;
1776                         scb->dev_target         = target;
1777                         mbox                    = ccb->mbox;
1778                         mbox64                  = ccb->mbox64;
1779                         mbox->logdrv            = target;
1780
1781                         /*
1782                          * A little HACK: 2nd bit is zero for all scsi read
1783                          * commands and is set for all scsi write commands
1784                          */
1785                         mbox->cmd = (scp->cmnd[0] & 0x02) ?  MBOXCMD_LWRITE64:
1786                                         MBOXCMD_LREAD64 ;
1787
1788                         /*
1789                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1790                          */
1791                         if (scp->cmd_len == 6) {
1792                                 mbox->numsectors = (uint32_t)scp->cmnd[4];
1793                                 mbox->lba =
1794                                         ((uint32_t)scp->cmnd[1] << 16)  |
1795                                         ((uint32_t)scp->cmnd[2] << 8)   |
1796                                         (uint32_t)scp->cmnd[3];
1797
1798                                 mbox->lba &= 0x1FFFFF;
1799                         }
1800
1801                         /*
1802                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1803                          */
1804                         else if (scp->cmd_len == 10) {
1805                                 mbox->numsectors =
1806                                         (uint32_t)scp->cmnd[8] |
1807                                         ((uint32_t)scp->cmnd[7] << 8);
1808                                 mbox->lba =
1809                                         ((uint32_t)scp->cmnd[2] << 24) |
1810                                         ((uint32_t)scp->cmnd[3] << 16) |
1811                                         ((uint32_t)scp->cmnd[4] << 8) |
1812                                         (uint32_t)scp->cmnd[5];
1813                         }
1814
1815                         /*
1816                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1817                          */
1818                         else if (scp->cmd_len == 12) {
1819                                 mbox->lba =
1820                                         ((uint32_t)scp->cmnd[2] << 24) |
1821                                         ((uint32_t)scp->cmnd[3] << 16) |
1822                                         ((uint32_t)scp->cmnd[4] << 8) |
1823                                         (uint32_t)scp->cmnd[5];
1824
1825                                 mbox->numsectors =
1826                                         ((uint32_t)scp->cmnd[6] << 24) |
1827                                         ((uint32_t)scp->cmnd[7] << 16) |
1828                                         ((uint32_t)scp->cmnd[8] << 8) |
1829                                         (uint32_t)scp->cmnd[9];
1830                         }
1831                         else {
1832                                 con_log(CL_ANN, (KERN_WARNING
1833                                         "megaraid: unsupported CDB length\n"));
1834
1835                                 megaraid_dealloc_scb(adapter, scb);
1836
1837                                 scp->result = (DID_ERROR << 16);
1838                                 return NULL;
1839                         }
1840
1841                         scb->dma_direction = scp->sc_data_direction;
1842
1843                         // Calculate Scatter-Gather info
1844                         mbox64->xferaddr_lo     = (uint32_t )ccb->sgl_dma_h;
1845                         mbox->numsge            = megaraid_mbox_mksgl(adapter,
1846                                                         scb);
1847                         mbox->xferaddr          = 0xFFFFFFFF;
1848                         mbox64->xferaddr_hi     = 0;
1849
1850                         return scb;
1851
1852                 case RESERVE:
1853                 case RELEASE:
1854                         /*
1855                          * Do we support clustering and is the support enabled
1856                          */
1857                         if (!adapter->ha) {
1858                                 scp->result = (DID_BAD_TARGET << 16);
1859                                 return NULL;
1860                         }
1861
1862                         /*
1863                          * Allocate a SCB and initialize mailbox
1864                          */
1865                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1866                                 scp->result = (DID_ERROR << 16);
1867                                 *busy = 1;
1868                                 return NULL;
1869                         }
1870
1871                         ccb                     = (mbox_ccb_t *)scb->ccb;
1872                         scb->dev_channel        = 0xFF;
1873                         scb->dev_target         = target;
1874                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1875                         ccb->raw_mbox[2]        =  (scp->cmnd[0] == RESERVE) ?
1876                                                 RESERVE_LD : RELEASE_LD;
1877
1878                         ccb->raw_mbox[3]        = target;
1879                         scb->dma_direction      = scp->sc_data_direction;
1880
1881                         return scb;
1882
1883                 default:
1884                         scp->result = (DID_BAD_TARGET << 16);
1885                         return NULL;
1886                 }
1887         }
1888         else { // Passthru device commands
1889
1890                 // Do not allow access to target id > 15 or LUN > 7
1891                 if (target > 15 || SCP2LUN(scp) > 7) {
1892                         scp->result = (DID_BAD_TARGET << 16);
1893                         return NULL;
1894                 }
1895
1896                 // if fast load option was set and scan for last device is
1897                 // over, reset the fast_load flag so that during a possible
1898                 // next scan, devices can be made available
1899                 if (rdev->fast_load && (target == 15) &&
1900                         (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1901
1902                         con_log(CL_ANN, (KERN_INFO
1903                         "megaraid[%d]: physical device scan re-enabled\n",
1904                                 adapter->host->host_no));
1905                         rdev->fast_load = 0;
1906                 }
1907
1908                 /*
1909                  * Display the channel scan for physical devices
1910                  */
1911                 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1912
1913                         ss = rdev->fast_load ? skip : scan;
1914
1915                         con_log(CL_ANN, (KERN_INFO
1916                                 "scsi[%d]: %s scsi channel %d [Phy %d]",
1917                                 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1918                                 channel));
1919
1920                         con_log(CL_ANN, (
1921                                 " for non-raid devices\n"));
1922
1923                         rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1924                 }
1925
1926                 // disable channel sweep if fast load option given
1927                 if (rdev->fast_load) {
1928                         scp->result = (DID_BAD_TARGET << 16);
1929                         return NULL;
1930                 }
1931
1932                 // Allocate a SCB and initialize passthru
1933                 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1934                         scp->result = (DID_ERROR << 16);
1935                         *busy = 1;
1936                         return NULL;
1937                 }
1938
1939                 ccb                     = (mbox_ccb_t *)scb->ccb;
1940                 scb->dev_channel        = channel;
1941                 scb->dev_target         = target;
1942                 scb->dma_direction      = scp->sc_data_direction;
1943                 mbox                    = ccb->mbox;
1944                 mbox64                  = ccb->mbox64;
1945
1946                 // Does this firmware support extended CDBs
1947                 if (adapter->max_cdb_sz == 16) {
1948                         mbox->cmd               = MBOXCMD_EXTPTHRU;
1949
1950                         megaraid_mbox_prepare_epthru(adapter, scb, scp);
1951
1952                         mbox64->xferaddr_lo     = (uint32_t)ccb->epthru_dma_h;
1953                         mbox64->xferaddr_hi     = 0;
1954                         mbox->xferaddr          = 0xFFFFFFFF;
1955                 }
1956                 else {
1957                         mbox->cmd = MBOXCMD_PASSTHRU64;
1958
1959                         megaraid_mbox_prepare_pthru(adapter, scb, scp);
1960
1961                         mbox64->xferaddr_lo     = (uint32_t)ccb->pthru_dma_h;
1962                         mbox64->xferaddr_hi     = 0;
1963                         mbox->xferaddr          = 0xFFFFFFFF;
1964                 }
1965                 return scb;
1966         }
1967
1968         // NOT REACHED
1969 }
1970
1971
1972 /**
1973  * megaraid_mbox_runpendq - execute commands queued in the pending queue
1974  * @adapter     : controller's soft state
1975  * @scb         : SCB to be queued in the pending list
1976  *
1977  * scan the pending list for commands which are not yet issued and try to
1978  * post to the controller. The SCB can be a null pointer, which would indicate
1979  * no SCB to be queue, just try to execute the ones in the pending list.
1980  *
1981  * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1982  * out from the head of the pending list. If it is successfully issued, the
1983  * next SCB is at the head now.
1984  */
1985 static void
1986 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1987 {
1988         scb_t                   *scb;
1989         unsigned long           flags;
1990
1991         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1992
1993         if (scb_q) {
1994                 scb_q->state = SCB_PENDQ;
1995                 list_add_tail(&scb_q->list, &adapter->pend_list);
1996         }
1997
1998         // if the adapter in not in quiescent mode, post the commands to FW
1999         if (adapter->quiescent) {
2000                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2001                 return;
2002         }
2003
2004         while (!list_empty(&adapter->pend_list)) {
2005
2006                 assert_spin_locked(PENDING_LIST_LOCK(adapter));
2007
2008                 scb = list_entry(adapter->pend_list.next, scb_t, list);
2009
2010                 // remove the scb from the pending list and try to
2011                 // issue. If we are unable to issue it, put back in
2012                 // the pending list and return
2013
2014                 list_del_init(&scb->list);
2015
2016                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2017
2018                 // if mailbox was busy, return SCB back to pending
2019                 // list. Make sure to add at the head, since that's
2020                 // where it would have been removed from
2021
2022                 scb->state = SCB_ISSUED;
2023
2024                 if (mbox_post_cmd(adapter, scb) != 0) {
2025
2026                         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2027
2028                         scb->state = SCB_PENDQ;
2029
2030                         list_add(&scb->list, &adapter->pend_list);
2031
2032                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2033                                 flags);
2034
2035                         return;
2036                 }
2037
2038                 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2039         }
2040
2041         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2042
2043
2044         return;
2045 }
2046
2047
2048 /**
2049  * megaraid_mbox_prepare_pthru - prepare a command for physical devices
2050  * @adapter     - pointer to controller's soft state
2051  * @scb         - scsi control block
2052  * @scp         - scsi command from the mid-layer
2053  *
2054  * prepare a command for the scsi physical devices
2055  */
2056 static void
2057 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
2058                 struct scsi_cmnd *scp)
2059 {
2060         mbox_ccb_t              *ccb;
2061         mraid_passthru_t        *pthru;
2062         uint8_t                 channel;
2063         uint8_t                 target;
2064
2065         ccb     = (mbox_ccb_t *)scb->ccb;
2066         pthru   = ccb->pthru;
2067         channel = scb->dev_channel;
2068         target  = scb->dev_target;
2069
2070         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2071         pthru->timeout          = 4;    
2072         pthru->ars              = 1;
2073         pthru->islogical        = 0;
2074         pthru->channel          = 0;
2075         pthru->target           = (channel << 4) | target;
2076         pthru->logdrv           = SCP2LUN(scp);
2077         pthru->reqsenselen      = 14;
2078         pthru->cdblen           = scp->cmd_len;
2079
2080         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2081
2082         if (scp->request_bufflen) {
2083                 pthru->dataxferlen      = scp->request_bufflen;
2084                 pthru->dataxferaddr     = ccb->sgl_dma_h;
2085                 pthru->numsge           = megaraid_mbox_mksgl(adapter, scb);
2086         }
2087         else {
2088                 pthru->dataxferaddr     = 0;
2089                 pthru->dataxferlen      = 0;
2090                 pthru->numsge           = 0;
2091         }
2092         return;
2093 }
2094
2095
2096 /**
2097  * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2098  * @adapter     - pointer to controller's soft state
2099  * @scb         - scsi control block
2100  * @scp         - scsi command from the mid-layer
2101  *
2102  * prepare a command for the scsi physical devices. This rountine prepares
2103  * commands for devices which can take extended CDBs (>10 bytes)
2104  */
2105 static void
2106 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2107                 struct scsi_cmnd *scp)
2108 {
2109         mbox_ccb_t              *ccb;
2110         mraid_epassthru_t       *epthru;
2111         uint8_t                 channel;
2112         uint8_t                 target;
2113
2114         ccb     = (mbox_ccb_t *)scb->ccb;
2115         epthru  = ccb->epthru;
2116         channel = scb->dev_channel;
2117         target  = scb->dev_target;
2118
2119         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2120         epthru->timeout         = 4;    
2121         epthru->ars             = 1;
2122         epthru->islogical       = 0;
2123         epthru->channel         = 0;
2124         epthru->target          = (channel << 4) | target;
2125         epthru->logdrv          = SCP2LUN(scp);
2126         epthru->reqsenselen     = 14;
2127         epthru->cdblen          = scp->cmd_len;
2128
2129         memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2130
2131         if (scp->request_bufflen) {
2132                 epthru->dataxferlen     = scp->request_bufflen;
2133                 epthru->dataxferaddr    = ccb->sgl_dma_h;
2134                 epthru->numsge          = megaraid_mbox_mksgl(adapter, scb);
2135         }
2136         else {
2137                 epthru->dataxferaddr    = 0;
2138                 epthru->dataxferlen     = 0;
2139                 epthru->numsge          = 0;
2140         }
2141         return;
2142 }
2143
2144
2145 /**
2146  * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2147  * @adapter     - controller's soft state
2148  *
2149  * Interrupt ackrowledgement sequence for memory mapped HBAs. Find out the
2150  * completed command and put them on the completed list for later processing.
2151  *
2152  * Returns:     1 if the interrupt is valid, 0 otherwise
2153  */
2154 static inline int
2155 megaraid_ack_sequence(adapter_t *adapter)
2156 {
2157         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2158         mbox_t                  *mbox;
2159         scb_t                   *scb;
2160         uint8_t                 nstatus;
2161         uint8_t                 completed[MBOX_MAX_FIRMWARE_STATUS];
2162         struct list_head        clist;
2163         int                     handled;
2164         uint32_t                dword;
2165         unsigned long           flags;
2166         int                     i, j;
2167
2168
2169         mbox    = raid_dev->mbox;
2170
2171         // move the SCBs from the firmware completed array to our local list
2172         INIT_LIST_HEAD(&clist);
2173
2174         // loop till F/W has more commands for us to complete
2175         handled = 0;
2176         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2177         do {
2178                 /*
2179                  * Check if a valid interrupt is pending. If found, force the
2180                  * interrupt line low.
2181                  */
2182                 dword = RDOUTDOOR(raid_dev);
2183                 if (dword != 0x10001234) break;
2184
2185                 handled = 1;
2186
2187                 WROUTDOOR(raid_dev, 0x10001234);
2188
2189                 nstatus = 0;
2190                 // wait for valid numstatus to post
2191                 for (i = 0; i < 0xFFFFF; i++) {
2192                         if (mbox->numstatus != 0xFF) {
2193                                 nstatus = mbox->numstatus;
2194                                 break;
2195                         }
2196                         rmb();
2197                 }
2198                 mbox->numstatus = 0xFF;
2199
2200                 adapter->outstanding_cmds -= nstatus;
2201
2202                 for (i = 0; i < nstatus; i++) {
2203
2204                         // wait for valid command index to post
2205                         for (j = 0; j < 0xFFFFF; j++) {
2206                                 if (mbox->completed[i] != 0xFF) break;
2207                                 rmb();
2208                         }
2209                         completed[i]            = mbox->completed[i];
2210                         mbox->completed[i]      = 0xFF;
2211
2212                         if (completed[i] == 0xFF) {
2213                                 con_log(CL_ANN, (KERN_CRIT
2214                                 "megaraid: command posting timed out\n"));
2215
2216                                 BUG();
2217                                 continue;
2218                         }
2219
2220                         // Get SCB associated with this command id
2221                         if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2222                                 // a cmm command
2223                                 scb = adapter->uscb_list + (completed[i] -
2224                                                 MBOX_MAX_SCSI_CMDS);
2225                         }
2226                         else {
2227                                 // an os command
2228                                 scb = adapter->kscb_list + completed[i];
2229                         }
2230
2231                         scb->status = mbox->status;
2232                         list_add_tail(&scb->list, &clist);
2233                 }
2234
2235                 // Acknowledge interrupt
2236                 WRINDOOR(raid_dev, 0x02);
2237
2238         } while(1);
2239
2240         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2241
2242
2243         // put the completed commands in the completed list. DPC would
2244         // complete these commands later
2245         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2246
2247         list_splice(&clist, &adapter->completed_list);
2248
2249         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2250
2251
2252         // schedule the DPC if there is some work for it
2253         if (handled)
2254                 tasklet_schedule(&adapter->dpc_h);
2255
2256         return handled;
2257 }
2258
2259
2260 /**
2261  * megaraid_isr - isr for memory based mailbox based controllers
2262  * @irq         - irq
2263  * @devp        - pointer to our soft state
2264  * @regs        - unused
2265  *
2266  * Interrupt service routine for memory-mapped mailbox controllers.
2267  */
2268 static irqreturn_t
2269 megaraid_isr(int irq, void *devp, struct pt_regs *regs)
2270 {
2271         adapter_t       *adapter = devp;
2272         int             handled;
2273
2274         handled = megaraid_ack_sequence(adapter);
2275
2276         /* Loop through any pending requests */
2277         if (!adapter->quiescent) {
2278                 megaraid_mbox_runpendq(adapter, NULL);
2279         }
2280
2281         return IRQ_RETVAL(handled);
2282 }
2283
2284
2285 /**
2286  * megaraid_mbox_sync_scb - sync kernel buffers
2287  * @adapter     : controller's soft state
2288  * @scb         : pointer to the resource packet
2289  *
2290  * DMA sync if required.
2291  */
2292 static inline void
2293 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2294 {
2295         mbox_ccb_t      *ccb;
2296
2297         ccb     = (mbox_ccb_t *)scb->ccb;
2298
2299         switch (scb->dma_type) {
2300
2301         case MRAID_DMA_WBUF:
2302                 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2303                         pci_dma_sync_single_for_cpu(adapter->pdev,
2304                                         ccb->buf_dma_h,
2305                                         scb->scp->request_bufflen,
2306                                         PCI_DMA_FROMDEVICE);
2307                 }
2308
2309                 pci_unmap_page(adapter->pdev, ccb->buf_dma_h,
2310                         scb->scp->request_bufflen, scb->dma_direction);
2311
2312                 break;
2313
2314         case MRAID_DMA_WSG:
2315                 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2316                         pci_dma_sync_sg_for_cpu(adapter->pdev,
2317                                         scb->scp->request_buffer,
2318                                         scb->scp->use_sg, PCI_DMA_FROMDEVICE);
2319                 }
2320
2321                 pci_unmap_sg(adapter->pdev, scb->scp->request_buffer,
2322                         scb->scp->use_sg, scb->dma_direction);
2323
2324                 break;
2325
2326         default:
2327                 break;
2328         }
2329
2330         return;
2331 }
2332
2333
2334 /**
2335  * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2336  * @devp        : pointer to HBA soft state
2337  *
2338  * Pick up the commands from the completed list and send back to the owners.
2339  * This is a reentrant function and does not assume any locks are held while
2340  * it is being called.
2341  */
2342 static void
2343 megaraid_mbox_dpc(unsigned long devp)
2344 {
2345         adapter_t               *adapter = (adapter_t *)devp;
2346         mraid_device_t          *raid_dev;
2347         struct list_head        clist;
2348         struct scatterlist      *sgl;
2349         scb_t                   *scb;
2350         scb_t                   *tmp;
2351         struct scsi_cmnd        *scp;
2352         mraid_passthru_t        *pthru;
2353         mraid_epassthru_t       *epthru;
2354         mbox_ccb_t              *ccb;
2355         int                     islogical;
2356         int                     pdev_index;
2357         int                     pdev_state;
2358         mbox_t                  *mbox;
2359         unsigned long           flags;
2360         uint8_t                 c;
2361         int                     status;
2362
2363
2364         if (!adapter) return;
2365
2366         raid_dev = ADAP2RAIDDEV(adapter);
2367
2368         // move the SCBs from the completed list to our local list
2369         INIT_LIST_HEAD(&clist);
2370
2371         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2372
2373         list_splice_init(&adapter->completed_list, &clist);
2374
2375         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2376
2377
2378         list_for_each_entry_safe(scb, tmp, &clist, list) {
2379
2380                 status          = scb->status;
2381                 scp             = scb->scp;
2382                 ccb             = (mbox_ccb_t *)scb->ccb;
2383                 pthru           = ccb->pthru;
2384                 epthru          = ccb->epthru;
2385                 mbox            = ccb->mbox;
2386
2387                 // Make sure f/w has completed a valid command
2388                 if (scb->state != SCB_ISSUED) {
2389                         con_log(CL_ANN, (KERN_CRIT
2390                         "megaraid critical err: invalid command %d:%d:%p\n",
2391                                 scb->sno, scb->state, scp));
2392                         BUG();
2393                         continue;       // Must never happen!
2394                 }
2395
2396                 // check for the management command and complete it right away
2397                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2398                         scb->state      = SCB_FREE;
2399                         scb->status     = status;
2400
2401                         // remove from local clist
2402                         list_del_init(&scb->list);
2403
2404                         megaraid_mbox_mm_done(adapter, scb);
2405
2406                         continue;
2407                 }
2408
2409                 // Was an abort issued for this command earlier
2410                 if (scb->state & SCB_ABORT) {
2411                         con_log(CL_ANN, (KERN_NOTICE
2412                         "megaraid: aborted cmd %lx[%x] completed\n",
2413                                 scp->serial_number, scb->sno));
2414                 }
2415
2416                 /*
2417                  * If the inquiry came of a disk drive which is not part of
2418                  * any RAID array, expose it to the kernel. For this to be
2419                  * enabled, user must set the "megaraid_expose_unconf_disks"
2420                  * flag to 1 by specifying it on module parameter list.
2421                  * This would enable data migration off drives from other
2422                  * configurations.
2423                  */
2424                 islogical = MRAID_IS_LOGICAL(adapter, scp);
2425                 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2426                                 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2427
2428                         if (scp->use_sg) {
2429                                 sgl = (struct scatterlist *)
2430                                         scp->request_buffer;
2431
2432                                 if (sgl->page) {
2433                                         c = *(unsigned char *)
2434                                         (page_address((&sgl[0])->page) +
2435                                                 (&sgl[0])->offset);
2436                                 }
2437                                 else {
2438                                         con_log(CL_ANN, (KERN_WARNING
2439                                         "megaraid mailbox: invalid sg:%d\n",
2440                                         __LINE__));
2441                                         c = 0;
2442                                 }
2443                         }
2444                         else {
2445                                 c = *(uint8_t *)scp->request_buffer;
2446                         }
2447
2448                         if ((c & 0x1F ) == TYPE_DISK) {
2449                                 pdev_index = (scb->dev_channel * 16) +
2450                                         scb->dev_target;
2451                                 pdev_state =
2452                                         raid_dev->pdrv_state[pdev_index] & 0x0F;
2453
2454                                 if (pdev_state == PDRV_ONLINE           ||
2455                                         pdev_state == PDRV_FAILED       ||
2456                                         pdev_state == PDRV_RBLD         ||
2457                                         pdev_state == PDRV_HOTSPARE     ||
2458                                         megaraid_expose_unconf_disks == 0) {
2459
2460                                         status = 0xF0;
2461                                 }
2462                         }
2463                 }
2464
2465                 // Convert MegaRAID status to Linux error code
2466                 switch (status) {
2467
2468                 case 0x00:
2469
2470                         scp->result = (DID_OK << 16);
2471                         break;
2472
2473                 case 0x02:
2474
2475                         /* set sense_buffer and result fields */
2476                         if (mbox->cmd == MBOXCMD_PASSTHRU ||
2477                                 mbox->cmd == MBOXCMD_PASSTHRU64) {
2478
2479                                 memcpy(scp->sense_buffer, pthru->reqsensearea,
2480                                                 14);
2481
2482                                 scp->result = DRIVER_SENSE << 24 |
2483                                         DID_OK << 16 | CHECK_CONDITION << 1;
2484                         }
2485                         else {
2486                                 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2487
2488                                         memcpy(scp->sense_buffer,
2489                                                 epthru->reqsensearea, 14);
2490
2491                                         scp->result = DRIVER_SENSE << 24 |
2492                                                 DID_OK << 16 |
2493                                                 CHECK_CONDITION << 1;
2494                                 } else {
2495                                         scp->sense_buffer[0] = 0x70;
2496                                         scp->sense_buffer[2] = ABORTED_COMMAND;
2497                                         scp->result = CHECK_CONDITION << 1;
2498                                 }
2499                         }
2500                         break;
2501
2502                 case 0x08:
2503
2504                         scp->result = DID_BUS_BUSY << 16 | status;
2505                         break;
2506
2507                 default:
2508
2509                         /*
2510                          * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2511                          * failed
2512                          */
2513                         if (scp->cmnd[0] == TEST_UNIT_READY) {
2514                                 scp->result = DID_ERROR << 16 |
2515                                         RESERVATION_CONFLICT << 1;
2516                         }
2517                         else
2518                         /*
2519                          * Error code returned is 1 if Reserve or Release
2520                          * failed or the input parameter is invalid
2521                          */
2522                         if (status == 1 && (scp->cmnd[0] == RESERVE ||
2523                                          scp->cmnd[0] == RELEASE)) {
2524
2525                                 scp->result = DID_ERROR << 16 |
2526                                         RESERVATION_CONFLICT << 1;
2527                         }
2528                         else {
2529                                 scp->result = DID_BAD_TARGET << 16 | status;
2530                         }
2531                 }
2532
2533                 // print a debug message for all failed commands
2534                 if (status) {
2535                         megaraid_mbox_display_scb(adapter, scb);
2536                 }
2537
2538                 // Free our internal resources and call the mid-layer callback
2539                 // routine
2540                 megaraid_mbox_sync_scb(adapter, scb);
2541
2542                 // remove from local clist
2543                 list_del_init(&scb->list);
2544
2545                 // put back in free list
2546                 megaraid_dealloc_scb(adapter, scb);
2547
2548                 // send the scsi packet back to kernel
2549                 spin_lock(adapter->host_lock);
2550                 scp->scsi_done(scp);
2551                 spin_unlock(adapter->host_lock);
2552         }
2553
2554         return;
2555 }
2556
2557
2558 /**
2559  * megaraid_abort_handler - abort the scsi command
2560  * @scp         : command to be aborted
2561  *
2562  * Abort a previous SCSI request. Only commands on the pending list can be
2563  * aborted. All the commands issued to the F/W must complete.
2564  **/
2565 static int
2566 __megaraid_abort_handler(struct scsi_cmnd *scp)
2567 {
2568         adapter_t               *adapter;
2569         mraid_device_t          *raid_dev;
2570         scb_t                   *scb;
2571         scb_t                   *tmp;
2572         int                     found;
2573         unsigned long           flags;
2574         int                     i;
2575
2576
2577         adapter         = SCP2ADAPTER(scp);
2578         raid_dev        = ADAP2RAIDDEV(adapter);
2579
2580         assert_spin_locked(adapter->host_lock);
2581
2582         con_log(CL_ANN, (KERN_WARNING
2583                 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2584                 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2585                 SCP2TARGET(scp), SCP2LUN(scp)));
2586
2587         // If FW has stopped responding, simply return failure
2588         if (raid_dev->hw_error) {
2589                 con_log(CL_ANN, (KERN_NOTICE
2590                         "megaraid: hw error, not aborting\n"));
2591                 return FAILED;
2592         }
2593
2594         // There might a race here, where the command was completed by the
2595         // firmware and now it is on the completed list. Before we could
2596         // complete the command to the kernel in dpc, the abort came.
2597         // Find out if this is the case to avoid the race.
2598         scb = NULL;
2599         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2600         list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2601
2602                 if (scb->scp == scp) {  // Found command
2603
2604                         list_del_init(&scb->list);      // from completed list
2605
2606                         con_log(CL_ANN, (KERN_WARNING
2607                         "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2608                                 scp->serial_number, scb->sno,
2609                                 scb->dev_channel, scb->dev_target));
2610
2611                         scp->result = (DID_ABORT << 16);
2612                         scp->scsi_done(scp);
2613
2614                         megaraid_dealloc_scb(adapter, scb);
2615
2616                         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2617                                 flags);
2618
2619                         return SUCCESS;
2620                 }
2621         }
2622         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2623
2624
2625         // Find out if this command is still on the pending list. If it is and
2626         // was never issued, abort and return success. If the command is owned
2627         // by the firmware, we must wait for it to complete by the FW.
2628         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2629         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2630
2631                 if (scb->scp == scp) {  // Found command
2632
2633                         list_del_init(&scb->list);      // from pending list
2634
2635                         ASSERT(!(scb->state & SCB_ISSUED));
2636
2637                         con_log(CL_ANN, (KERN_WARNING
2638                                 "megaraid abort: %ld[%d:%d], driver owner\n",
2639                                 scp->serial_number, scb->dev_channel,
2640                                 scb->dev_target));
2641
2642                         scp->result = (DID_ABORT << 16);
2643                         scp->scsi_done(scp);
2644
2645                         megaraid_dealloc_scb(adapter, scb);
2646
2647                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2648                                 flags);
2649
2650                         return SUCCESS;
2651                 }
2652         }
2653         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2654
2655
2656         // Check do we even own this command, in which case this would be
2657         // owned by the firmware. The only way to locate the FW scb is to
2658         // traverse through the list of all SCB, since driver does not
2659         // maintain these SCBs on any list
2660         found = 0;
2661         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2662                 scb = adapter->kscb_list + i;
2663
2664                 if (scb->scp == scp) {
2665
2666                         found = 1;
2667
2668                         if (!(scb->state & SCB_ISSUED)) {
2669                                 con_log(CL_ANN, (KERN_WARNING
2670                                 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2671                                 scp->serial_number, scb->sno, scb->dev_channel,
2672                                 scb->dev_target));
2673                                 BUG();
2674                         }
2675                         else {
2676                                 con_log(CL_ANN, (KERN_WARNING
2677                                 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2678                                 scp->serial_number, scb->sno, scb->dev_channel,
2679                                 scb->dev_target));
2680                         }
2681                 }
2682         }
2683
2684         if (!found) {
2685                 con_log(CL_ANN, (KERN_WARNING
2686                         "megaraid abort: scsi cmd:%ld, do now own\n",
2687                         scp->serial_number));
2688
2689                 // FIXME: Should there be a callback for this command?
2690                 return SUCCESS;
2691         }
2692
2693         // We cannot actually abort a command owned by firmware, return
2694         // failure and wait for reset. In host reset handler, we will find out
2695         // if the HBA is still live
2696         return FAILED;
2697 }
2698
2699 static int
2700 megaraid_abort_handler(struct scsi_cmnd *scp)
2701 {
2702         adapter_t       *adapter;
2703         int rc;
2704
2705         adapter         = SCP2ADAPTER(scp);
2706
2707         spin_lock_irq(adapter->host_lock);
2708         rc = __megaraid_abort_handler(scp);
2709         spin_unlock_irq(adapter->host_lock);
2710
2711         return rc;
2712 }
2713
2714
2715 /**
2716  * megaraid_reset_handler - device reset hadler for mailbox based driver
2717  * @scp         : reference command
2718  *
2719  * Reset handler for the mailbox based controller. First try to find out if
2720  * the FW is still live, in which case the outstanding commands counter mut go
2721  * down to 0. If that happens, also issue the reservation reset command to
2722  * relinquish (possible) reservations on the logical drives connected to this
2723  * host
2724  **/
2725 static int
2726 __megaraid_reset_handler(struct scsi_cmnd *scp)
2727 {
2728         adapter_t       *adapter;
2729         scb_t           *scb;
2730         scb_t           *tmp;
2731         mraid_device_t  *raid_dev;
2732         unsigned long   flags;
2733         uint8_t         raw_mbox[sizeof(mbox_t)];
2734         int             rval;
2735         int             recovery_window;
2736         int             recovering;
2737         int             i;
2738
2739         adapter         = SCP2ADAPTER(scp);
2740         raid_dev        = ADAP2RAIDDEV(adapter);
2741
2742         assert_spin_locked(adapter->host_lock);
2743
2744         con_log(CL_ANN, (KERN_WARNING "megaraid: reseting the host...\n"));
2745
2746         // return failure if adapter is not responding
2747         if (raid_dev->hw_error) {
2748                 con_log(CL_ANN, (KERN_NOTICE
2749                         "megaraid: hw error, cannot reset\n"));
2750                 return FAILED;
2751         }
2752
2753
2754         // Under exceptional conditions, FW can take up to 3 minutes to
2755         // complete command processing. Wait for additional 2 minutes for the
2756         // pending commands counter to go down to 0. If it doesn't, let the
2757         // controller be marked offline
2758         // Also, reset all the commands currently owned by the driver
2759         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2760         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2761
2762                 list_del_init(&scb->list);      // from pending list
2763
2764                 con_log(CL_ANN, (KERN_WARNING
2765                         "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2766                                 scp->serial_number, scb->sno,
2767                                 scb->dev_channel, scb->dev_target));
2768
2769                 scp->result = (DID_RESET << 16);
2770                 scp->scsi_done(scp);
2771
2772                 megaraid_dealloc_scb(adapter, scb);
2773         }
2774         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2775
2776         if (adapter->outstanding_cmds) {
2777                 con_log(CL_ANN, (KERN_NOTICE
2778                         "megaraid: %d outstanding commands. Max wait %d sec\n",
2779                         adapter->outstanding_cmds, MBOX_RESET_WAIT));
2780         }
2781
2782         spin_unlock(adapter->host_lock);
2783
2784         recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2785
2786         recovering = adapter->outstanding_cmds;
2787
2788         for (i = 0; i < recovery_window && adapter->outstanding_cmds; i++) {
2789
2790                 megaraid_ack_sequence(adapter);
2791
2792                 // print a message once every 5 seconds only
2793                 if (!(i % 5)) {
2794                         con_log(CL_ANN, (
2795                         "megaraid mbox: Wait for %d commands to complete:%d\n",
2796                                 adapter->outstanding_cmds,
2797                                 MBOX_RESET_WAIT - i));
2798                 }
2799
2800                 // bailout if no recovery happended in reset time
2801                 if ((i == MBOX_RESET_WAIT) &&
2802                         (recovering == adapter->outstanding_cmds)) {
2803                         break;
2804                 }
2805
2806                 msleep(1000);
2807         }
2808
2809         spin_lock(adapter->host_lock);
2810
2811         // If still outstanding commands, bail out
2812         if (adapter->outstanding_cmds) {
2813                 con_log(CL_ANN, (KERN_WARNING
2814                         "megaraid mbox: critical hardware error!\n"));
2815
2816                 raid_dev->hw_error = 1;
2817
2818                 return FAILED;
2819         }
2820         else {
2821                 con_log(CL_ANN, (KERN_NOTICE
2822                 "megaraid mbox: reset sequence completed sucessfully\n"));
2823         }
2824
2825
2826         // If the controller supports clustering, reset reservations
2827         if (!adapter->ha) return SUCCESS;
2828
2829         // clear reservations if any
2830         raw_mbox[0] = CLUSTER_CMD;
2831         raw_mbox[2] = RESET_RESERVATIONS;
2832
2833         rval = SUCCESS;
2834         if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2835                 con_log(CL_ANN,
2836                         (KERN_INFO "megaraid: reservation reset\n"));
2837         }
2838         else {
2839                 rval = FAILED;
2840                 con_log(CL_ANN, (KERN_WARNING
2841                                 "megaraid: reservation reset failed\n"));
2842         }
2843
2844         return rval;
2845 }
2846
2847 static int
2848 megaraid_reset_handler(struct scsi_cmnd *cmd)
2849 {
2850         int rc;
2851
2852         spin_lock_irq(cmd->device->host->host_lock);
2853         rc = __megaraid_reset_handler(cmd);
2854         spin_unlock_irq(cmd->device->host->host_lock);
2855
2856         return rc;
2857 }
2858
2859
2860 /*
2861  * START: internal commands library
2862  *
2863  * This section of the driver has the common routine used by the driver and
2864  * also has all the FW routines
2865  */
2866
2867 /**
2868  * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2869  * @adapter     - controller's soft state
2870  * @raw_mbox    - the mailbox
2871  *
2872  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2873  * controllers
2874  */
2875 static int
2876 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2877 {
2878         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2879         mbox64_t        *mbox64;
2880         mbox_t          *mbox;
2881         uint8_t         status;
2882         int             i;
2883
2884
2885         mbox64  = raid_dev->mbox64;
2886         mbox    = raid_dev->mbox;
2887
2888         /*
2889          * Wait until mailbox is free
2890          */
2891         if (megaraid_busywait_mbox(raid_dev) != 0)
2892                 goto blocked_mailbox;
2893
2894         /*
2895          * Copy mailbox data into host structure
2896          */
2897         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2898         mbox->cmdid             = 0xFE;
2899         mbox->busy              = 1;
2900         mbox->poll              = 0;
2901         mbox->ack               = 0;
2902         mbox->numstatus         = 0xFF;
2903         mbox->status            = 0xFF;
2904
2905         wmb();
2906         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2907
2908         // wait for maximum 1 second for status to post. If the status is not
2909         // available within 1 second, assume FW is initializing and wait
2910         // for an extended amount of time
2911         if (mbox->numstatus == 0xFF) {  // status not yet available
2912                 udelay(25);;
2913
2914                 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2915                         rmb();
2916                         msleep(1);
2917                 }
2918
2919
2920                 if (i == 1000) {
2921                         con_log(CL_ANN, (KERN_NOTICE
2922                                 "megaraid mailbox: wait for FW to boot      "));
2923
2924                         for (i = 0; (mbox->numstatus == 0xFF) &&
2925                                         (i < MBOX_RESET_WAIT); i++) {
2926                                 rmb();
2927                                 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2928                                                         MBOX_RESET_WAIT - i));
2929                                 msleep(1000);
2930                         }
2931
2932                         if (i == MBOX_RESET_WAIT) {
2933
2934                                 con_log(CL_ANN, (
2935                                 "\nmegaraid mailbox: status not available\n"));
2936
2937                                 return -1;
2938                         }
2939                         con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2940                 }
2941         }
2942
2943         // wait for maximum 1 second for poll semaphore
2944         if (mbox->poll != 0x77) {
2945                 udelay(25);
2946
2947                 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2948                         rmb();
2949                         msleep(1);
2950                 }
2951
2952                 if (i == 1000) {
2953                         con_log(CL_ANN, (KERN_WARNING
2954                         "megaraid mailbox: could not get poll semaphore\n"));
2955                         return -1;
2956                 }
2957         }
2958
2959         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2960         wmb();
2961
2962         // wait for maximum 1 second for acknowledgement
2963         if (RDINDOOR(raid_dev) & 0x2) {
2964                 udelay(25);
2965
2966                 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2967                         rmb();
2968                         msleep(1);
2969                 }
2970
2971                 if (i == 1000) {
2972                         con_log(CL_ANN, (KERN_WARNING
2973                                 "megaraid mailbox: could not acknowledge\n"));
2974                         return -1;
2975                 }
2976         }
2977         mbox->poll      = 0;
2978         mbox->ack       = 0x77;
2979
2980         status = mbox->status;
2981
2982         // invalidate the completed command id array. After command
2983         // completion, firmware would write the valid id.
2984         mbox->numstatus = 0xFF;
2985         mbox->status    = 0xFF;
2986         for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2987                 mbox->completed[i] = 0xFF;
2988         }
2989
2990         return status;
2991
2992 blocked_mailbox:
2993
2994         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2995         return -1;
2996 }
2997
2998
2999 /**
3000  * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
3001  * @adapter     - controller's soft state
3002  * @raw_mbox    - the mailbox
3003  *
3004  * Issue a scb in synchronous and non-interrupt mode for mailbox based
3005  * controllers. This is a faster version of the synchronous command and
3006  * therefore can be called in interrupt-context as well
3007  */
3008 static int
3009 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
3010 {
3011         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3012         mbox_t          *mbox;
3013         long            i;
3014
3015
3016         mbox    = raid_dev->mbox;
3017