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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
[linux-2.6/linux-2.6-openrd.git] / drivers / scsi / megaraid / megaraid_mbox.c
blob7f977967b884892c5626a0e09c75756a7127d625
1 /*
2 *
3 * Linux MegaRAID device driver
4 *
5 * Copyright (c) 2003-2004 LSI Logic Corporation.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 *
12 * FILE : megaraid_mbox.c
13 * Version : v2.20.5.1 (Nov 16 2006)
14 *
15 * Authors:
16 * Atul Mukker <Atul.Mukker@lsi.com>
17 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com>
18 * Manoj Jose <Manoj.Jose@lsi.com>
19 * Seokmann Ju
20 *
21 * List of supported controllers
22 *
23 * OEM Product Name VID DID SSVID SSID
24 * --- ------------ --- --- ---- ----
25 * Dell PERC3/QC 101E 1960 1028 0471
26 * Dell PERC3/DC 101E 1960 1028 0493
27 * Dell PERC3/SC 101E 1960 1028 0475
28 * Dell PERC3/Di 1028 1960 1028 0123
29 * Dell PERC4/SC 1000 1960 1028 0520
30 * Dell PERC4/DC 1000 1960 1028 0518
31 * Dell PERC4/QC 1000 0407 1028 0531
32 * Dell PERC4/Di 1028 000F 1028 014A
33 * Dell PERC 4e/Si 1028 0013 1028 016c
34 * Dell PERC 4e/Di 1028 0013 1028 016d
35 * Dell PERC 4e/Di 1028 0013 1028 016e
36 * Dell PERC 4e/Di 1028 0013 1028 016f
37 * Dell PERC 4e/Di 1028 0013 1028 0170
38 * Dell PERC 4e/DC 1000 0408 1028 0002
39 * Dell PERC 4e/SC 1000 0408 1028 0001
40 *
41 *
42 * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520
43 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520
44 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518
45 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530
46 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532
47 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531
48 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001
49 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002
50 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523
51 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523
52 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004
53 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008
54 *
55 * INTEL RAID Controller SRCU42X 1000 0407 8086 0532
56 * INTEL RAID Controller SRCS16 1000 1960 8086 0523
57 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002
58 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530
59 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008
60 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431
61 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499
62 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520
63 *
64 * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065
65 *
66 * ACER MegaRAID ROMB-2E 1000 0408 1025 004D
67 *
68 * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287
69 *
70 * For history of changes, see Documentation/ChangeLog.megaraid
71 */
72
73 #include "megaraid_mbox.h"
74
75 static int megaraid_init(void);
76 static void megaraid_exit(void);
77
78 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
79 static void megaraid_detach_one(struct pci_dev *);
80 static void megaraid_mbox_shutdown(struct pci_dev *);
81
82 static int megaraid_io_attach(adapter_t *);
83 static void megaraid_io_detach(adapter_t *);
84
85 static int megaraid_init_mbox(adapter_t *);
86 static void megaraid_fini_mbox(adapter_t *);
87
88 static int megaraid_alloc_cmd_packets(adapter_t *);
89 static void megaraid_free_cmd_packets(adapter_t *);
90
91 static int megaraid_mbox_setup_dma_pools(adapter_t *);
92 static void megaraid_mbox_teardown_dma_pools(adapter_t *);
93
94 static int megaraid_sysfs_alloc_resources(adapter_t *);
95 static void megaraid_sysfs_free_resources(adapter_t *);
96
97 static int megaraid_abort_handler(struct scsi_cmnd *);
98 static int megaraid_reset_handler(struct scsi_cmnd *);
99
100 static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
101 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
102 static int megaraid_busywait_mbox(mraid_device_t *);
103 static int megaraid_mbox_product_info(adapter_t *);
104 static int megaraid_mbox_extended_cdb(adapter_t *);
105 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
106 static int megaraid_mbox_support_random_del(adapter_t *);
107 static int megaraid_mbox_get_max_sg(adapter_t *);
108 static void megaraid_mbox_enum_raid_scsi(adapter_t *);
109 static void megaraid_mbox_flush_cache(adapter_t *);
110 static int megaraid_mbox_fire_sync_cmd(adapter_t *);
111
112 static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
113 static void megaraid_mbox_setup_device_map(adapter_t *);
114
115 static int megaraid_queue_command(struct scsi_cmnd *,
116 void (*)(struct scsi_cmnd *));
117 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
118 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
119 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
120 struct scsi_cmnd *);
121 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
122 struct scsi_cmnd *);
123
124 static irqreturn_t megaraid_isr(int, void *);
125
126 static void megaraid_mbox_dpc(unsigned long);
127
128 static ssize_t megaraid_sysfs_show_app_hndl(struct device *, struct device_attribute *attr, char *);
129 static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *);
130
131 static int megaraid_cmm_register(adapter_t *);
132 static int megaraid_cmm_unregister(adapter_t *);
133 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
134 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
135 static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
136 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
137 static int wait_till_fw_empty(adapter_t *);
138
139
140
141 MODULE_AUTHOR("megaraidlinux@lsi.com");
142 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
143 MODULE_LICENSE("GPL");
144 MODULE_VERSION(MEGARAID_VERSION);
145
146 /*
147 * ### modules parameters for driver ###
148 */
149
150 /*
151 * Set to enable driver to expose unconfigured disk to kernel
152 */
153 static int megaraid_expose_unconf_disks = 0;
154 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
155 MODULE_PARM_DESC(unconf_disks,
156 "Set to expose unconfigured disks to kernel (default=0)");
157
158 /*
159 * driver wait time if the adapter's mailbox is busy
160 */
161 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
162 module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
163 MODULE_PARM_DESC(busy_wait,
164 "Max wait for mailbox in microseconds if busy (default=10)");
165
166 /*
167 * number of sectors per IO command
168 */
169 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
170 module_param_named(max_sectors, megaraid_max_sectors, int, 0);
171 MODULE_PARM_DESC(max_sectors,
172 "Maximum number of sectors per IO command (default=128)");
173
174 /*
175 * number of commands per logical unit
176 */
177 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
178 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
179 MODULE_PARM_DESC(cmd_per_lun,
180 "Maximum number of commands per logical unit (default=64)");
181
182
183 /*
184 * Fast driver load option, skip scanning for physical devices during load.
185 * This would result in non-disk devices being skipped during driver load
186 * time. These can be later added though, using /proc/scsi/scsi
187 */
188 static unsigned int megaraid_fast_load = 0;
189 module_param_named(fast_load, megaraid_fast_load, int, 0);
190 MODULE_PARM_DESC(fast_load,
191 "Faster loading of the driver, skips physical devices! (default=0)");
192
193
194 /*
195 * mraid_debug level - threshold for amount of information to be displayed by
196 * the driver. This level can be changed through modules parameters, ioctl or
197 * sysfs/proc interface. By default, print the announcement messages only.
198 */
199 int mraid_debug_level = CL_ANN;
200 module_param_named(debug_level, mraid_debug_level, int, 0);
201 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
202
203 /*
204 * ### global data ###
205 */
206 static uint8_t megaraid_mbox_version[8] =
207 { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 };
208
209
210 /*
211 * PCI table for all supported controllers.
212 */
213 static struct pci_device_id pci_id_table_g[] = {
214 {
215 PCI_VENDOR_ID_DELL,
216 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
217 PCI_VENDOR_ID_DELL,
218 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
219 },
220 {
221 PCI_VENDOR_ID_LSI_LOGIC,
222 PCI_DEVICE_ID_PERC4_SC,
223 PCI_VENDOR_ID_DELL,
224 PCI_SUBSYS_ID_PERC4_SC,
225 },
226 {
227 PCI_VENDOR_ID_LSI_LOGIC,
228 PCI_DEVICE_ID_PERC4_DC,
229 PCI_VENDOR_ID_DELL,
230 PCI_SUBSYS_ID_PERC4_DC,
231 },
232 {
233 PCI_VENDOR_ID_LSI_LOGIC,
234 PCI_DEVICE_ID_VERDE,
235 PCI_ANY_ID,
236 PCI_ANY_ID,
237 },
238 {
239 PCI_VENDOR_ID_DELL,
240 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
241 PCI_VENDOR_ID_DELL,
242 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
243 },
244 {
245 PCI_VENDOR_ID_DELL,
246 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
247 PCI_VENDOR_ID_DELL,
248 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
249 },
250 {
251 PCI_VENDOR_ID_DELL,
252 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
253 PCI_VENDOR_ID_DELL,
254 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
255 },
256 {
257 PCI_VENDOR_ID_DELL,
258 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
259 PCI_VENDOR_ID_DELL,
260 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
261 },
262 {
263 PCI_VENDOR_ID_DELL,
264 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
265 PCI_VENDOR_ID_DELL,
266 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
267 },
268 {
269 PCI_VENDOR_ID_DELL,
270 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
271 PCI_VENDOR_ID_DELL,
272 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
273 },
274 {
275 PCI_VENDOR_ID_LSI_LOGIC,
276 PCI_DEVICE_ID_DOBSON,
277 PCI_ANY_ID,
278 PCI_ANY_ID,
279 },
280 {
281 PCI_VENDOR_ID_AMI,
282 PCI_DEVICE_ID_AMI_MEGARAID3,
283 PCI_ANY_ID,
284 PCI_ANY_ID,
285 },
286 {
287 PCI_VENDOR_ID_LSI_LOGIC,
288 PCI_DEVICE_ID_AMI_MEGARAID3,
289 PCI_ANY_ID,
290 PCI_ANY_ID,
291 },
292 {
293 PCI_VENDOR_ID_LSI_LOGIC,
294 PCI_DEVICE_ID_LINDSAY,
295 PCI_ANY_ID,
296 PCI_ANY_ID,
297 },
298 {0} /* Terminating entry */
299 };
300 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
301
302
303 static struct pci_driver megaraid_pci_driver = {
304 .name = "megaraid",
305 .id_table = pci_id_table_g,
306 .probe = megaraid_probe_one,
307 .remove = __devexit_p(megaraid_detach_one),
308 .shutdown = megaraid_mbox_shutdown,
309 };
310
311
312
313 // definitions for the device attributes for exporting logical drive number
314 // for a scsi address (Host, Channel, Id, Lun)
315
316 DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
317 NULL);
318
319 // Host template initializer for megaraid mbox sysfs device attributes
320 static struct device_attribute *megaraid_shost_attrs[] = {
321 &dev_attr_megaraid_mbox_app_hndl,
322 NULL,
323 };
324
325
326 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
327
328 // Host template initializer for megaraid mbox sysfs device attributes
329 static struct device_attribute *megaraid_sdev_attrs[] = {
330 &dev_attr_megaraid_mbox_ld,
331 NULL,
332 };
333
334 /**
335 * megaraid_change_queue_depth - Change the device's queue depth
336 * @sdev: scsi device struct
337 * @qdepth: depth to set
338 * @reason: calling context
339 *
340 * Return value:
341 * actual depth set
342 */
343 static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth,
344 int reason)
345 {
346 if (reason != SCSI_QDEPTH_DEFAULT)
347 return -EOPNOTSUPP;
348
349 if (qdepth > MBOX_MAX_SCSI_CMDS)
350 qdepth = MBOX_MAX_SCSI_CMDS;
351 scsi_adjust_queue_depth(sdev, 0, qdepth);
352 return sdev->queue_depth;
353 }
354
355 /*
356 * Scsi host template for megaraid unified driver
357 */
358 static struct scsi_host_template megaraid_template_g = {
359 .module = THIS_MODULE,
360 .name = "LSI Logic MegaRAID driver",
361 .proc_name = "megaraid",
362 .queuecommand = megaraid_queue_command,
363 .eh_abort_handler = megaraid_abort_handler,
364 .eh_device_reset_handler = megaraid_reset_handler,
365 .eh_bus_reset_handler = megaraid_reset_handler,
366 .eh_host_reset_handler = megaraid_reset_handler,
367 .change_queue_depth = megaraid_change_queue_depth,
368 .use_clustering = ENABLE_CLUSTERING,
369 .sdev_attrs = megaraid_sdev_attrs,
370 .shost_attrs = megaraid_shost_attrs,
371 };
372
373
374 /**
375 * megaraid_init - module load hook
376 *
377 * We register ourselves as hotplug enabled module and let PCI subsystem
378 * discover our adapters.
379 */
380 static int __init
381 megaraid_init(void)
382 {
383 int rval;
384
385 // Announce the driver version
386 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
387 MEGARAID_EXT_VERSION));
388
389 // check validity of module parameters
390 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
391
392 con_log(CL_ANN, (KERN_WARNING
393 "megaraid mailbox: max commands per lun reset to %d\n",
394 MBOX_MAX_SCSI_CMDS));
395
396 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
397 }
398
399
400 // register as a PCI hot-plug driver module
401 rval = pci_register_driver(&megaraid_pci_driver);
402 if (rval < 0) {
403 con_log(CL_ANN, (KERN_WARNING
404 "megaraid: could not register hotplug support.\n"));
405 }
406
407 return rval;
408 }
409
410
411 /**
412 * megaraid_exit - driver unload entry point
413 *
414 * We simply unwrap the megaraid_init routine here.
415 */
416 static void __exit
417 megaraid_exit(void)
418 {
419 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
420
421 // unregister as PCI hotplug driver
422 pci_unregister_driver(&megaraid_pci_driver);
423
424 return;
425 }
426
427
428 /**
429 * megaraid_probe_one - PCI hotplug entry point
430 * @pdev : handle to this controller's PCI configuration space
431 * @id : pci device id of the class of controllers
432 *
433 * This routine should be called whenever a new adapter is detected by the
434 * PCI hotplug susbsystem.
435 */
436 static int __devinit
437 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
438 {
439 adapter_t *adapter;
440
441
442 // detected a new controller
443 con_log(CL_ANN, (KERN_INFO
444 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
445 pdev->vendor, pdev->device, pdev->subsystem_vendor,
446 pdev->subsystem_device));
447
448 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
449 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
450
451 if (pci_enable_device(pdev)) {
452 con_log(CL_ANN, (KERN_WARNING
453 "megaraid: pci_enable_device failed\n"));
454
455 return -ENODEV;
456 }
457
458 // Enable bus-mastering on this controller
459 pci_set_master(pdev);
460
461 // Allocate the per driver initialization structure
462 adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL);
463
464 if (adapter == NULL) {
465 con_log(CL_ANN, (KERN_WARNING
466 "megaraid: out of memory, %s %d.\n", __func__, __LINE__));
467
468 goto out_probe_one;
469 }
470
471
472 // set up PCI related soft state and other pre-known parameters
473 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn;
474 adapter->irq = pdev->irq;
475 adapter->pdev = pdev;
476
477 atomic_set(&adapter->being_detached, 0);
478
479 // Setup the default DMA mask. This would be changed later on
480 // depending on hardware capabilities
481 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(32)) != 0) {
482
483 con_log(CL_ANN, (KERN_WARNING
484 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
485
486 goto out_free_adapter;
487 }
488
489
490 // Initialize the synchronization lock for kernel and LLD
491 spin_lock_init(&adapter->lock);
492
493 // Initialize the command queues: the list of free SCBs and the list
494 // of pending SCBs.
495 INIT_LIST_HEAD(&adapter->kscb_pool);
496 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
497
498 INIT_LIST_HEAD(&adapter->pend_list);
499 spin_lock_init(PENDING_LIST_LOCK(adapter));
500
501 INIT_LIST_HEAD(&adapter->completed_list);
502 spin_lock_init(COMPLETED_LIST_LOCK(adapter));
503
504
505 // Start the mailbox based controller
506 if (megaraid_init_mbox(adapter) != 0) {
507 con_log(CL_ANN, (KERN_WARNING
508 "megaraid: maibox adapter did not initialize\n"));
509
510 goto out_free_adapter;
511 }
512
513 // Register with LSI Common Management Module
514 if (megaraid_cmm_register(adapter) != 0) {
515
516 con_log(CL_ANN, (KERN_WARNING
517 "megaraid: could not register with management module\n"));
518
519 goto out_fini_mbox;
520 }
521
522 // setup adapter handle in PCI soft state
523 pci_set_drvdata(pdev, adapter);
524
525 // attach with scsi mid-layer
526 if (megaraid_io_attach(adapter) != 0) {
527
528 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
529
530 goto out_cmm_unreg;
531 }
532
533 return 0;
534
535 out_cmm_unreg:
536 pci_set_drvdata(pdev, NULL);
537 megaraid_cmm_unregister(adapter);
538 out_fini_mbox:
539 megaraid_fini_mbox(adapter);
540 out_free_adapter:
541 kfree(adapter);
542 out_probe_one:
543 pci_disable_device(pdev);
544
545 return -ENODEV;
546 }
547
548
549 /**
550 * megaraid_detach_one - release framework resources and call LLD release routine
551 * @pdev : handle for our PCI cofiguration space
552 *
553 * This routine is called during driver unload. We free all the allocated
554 * resources and call the corresponding LLD so that it can also release all
555 * its resources.
556 *
557 * This routine is also called from the PCI hotplug system.
558 */
559 static void
560 megaraid_detach_one(struct pci_dev *pdev)
561 {
562 adapter_t *adapter;
563 struct Scsi_Host *host;
564
565
566 // Start a rollback on this adapter
567 adapter = pci_get_drvdata(pdev);
568
569 if (!adapter) {
570 con_log(CL_ANN, (KERN_CRIT
571 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
572 pdev->vendor, pdev->device, pdev->subsystem_vendor,
573 pdev->subsystem_device));
574
575 return;
576 }
577 else {
578 con_log(CL_ANN, (KERN_NOTICE
579 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
580 pdev->vendor, pdev->device, pdev->subsystem_vendor,
581 pdev->subsystem_device));
582 }
583
584
585 host = adapter->host;
586
587 // do not allow any more requests from the management module for this
588 // adapter.
589 // FIXME: How do we account for the request which might still be
590 // pending with us?
591 atomic_set(&adapter->being_detached, 1);
592
593 // detach from the IO sub-system
594 megaraid_io_detach(adapter);
595
596 // reset the device state in the PCI structure. We check this
597 // condition when we enter here. If the device state is NULL,
598 // that would mean the device has already been removed
599 pci_set_drvdata(pdev, NULL);
600
601 // Unregister from common management module
602 //
603 // FIXME: this must return success or failure for conditions if there
604 // is a command pending with LLD or not.
605 megaraid_cmm_unregister(adapter);
606
607 // finalize the mailbox based controller and release all resources
608 megaraid_fini_mbox(adapter);
609
610 kfree(adapter);
611
612 scsi_host_put(host);
613
614 pci_disable_device(pdev);
615
616 return;
617 }
618
619
620 /**
621 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
622 * @pdev : generic driver model device
623 *
624 * Shutdown notification, perform flush cache.
625 */
626 static void
627 megaraid_mbox_shutdown(struct pci_dev *pdev)
628 {
629 adapter_t *adapter = pci_get_drvdata(pdev);
630 static int counter;
631
632 if (!adapter) {
633 con_log(CL_ANN, (KERN_WARNING
634 "megaraid: null device in shutdown\n"));
635 return;
636 }
637
638 // flush caches now
639 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
640 counter++));
641
642 megaraid_mbox_flush_cache(adapter);
643
644 con_log(CL_ANN, ("done\n"));
645 }
646
647
648 /**
649 * megaraid_io_attach - attach a device with the IO subsystem
650 * @adapter : controller's soft state
651 *
652 * Attach this device with the IO subsystem.
653 */
654 static int
655 megaraid_io_attach(adapter_t *adapter)
656 {
657 struct Scsi_Host *host;
658
659 // Initialize SCSI Host structure
660 host = scsi_host_alloc(&megaraid_template_g, 8);
661 if (!host) {
662 con_log(CL_ANN, (KERN_WARNING
663 "megaraid mbox: scsi_register failed\n"));
664
665 return -1;
666 }
667
668 SCSIHOST2ADAP(host) = (caddr_t)adapter;
669 adapter->host = host;
670
671 host->irq = adapter->irq;
672 host->unique_id = adapter->unique_id;
673 host->can_queue = adapter->max_cmds;
674 host->this_id = adapter->init_id;
675 host->sg_tablesize = adapter->sglen;
676 host->max_sectors = adapter->max_sectors;
677 host->cmd_per_lun = adapter->cmd_per_lun;
678 host->max_channel = adapter->max_channel;
679 host->max_id = adapter->max_target;
680 host->max_lun = adapter->max_lun;
681
682
683 // notify mid-layer about the new controller
684 if (scsi_add_host(host, &adapter->pdev->dev)) {
685
686 con_log(CL_ANN, (KERN_WARNING
687 "megaraid mbox: scsi_add_host failed\n"));
688
689 scsi_host_put(host);
690
691 return -1;
692 }
693
694 scsi_scan_host(host);
695
696 return 0;
697 }
698
699
700 /**
701 * megaraid_io_detach - detach a device from the IO subsystem
702 * @adapter : controller's soft state
703 *
704 * Detach this device from the IO subsystem.
705 */
706 static void
707 megaraid_io_detach(adapter_t *adapter)
708 {
709 struct Scsi_Host *host;
710
711 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
712
713 host = adapter->host;
714
715 scsi_remove_host(host);
716
717 return;
718 }
719
720
721 /*
722 * START: Mailbox Low Level Driver
723 *
724 * This is section specific to the single mailbox based controllers
725 */
726
727 /**
728 * megaraid_init_mbox - initialize controller
729 * @adapter : our soft state
730 *
731 * - Allocate 16-byte aligned mailbox memory for firmware handshake
732 * - Allocate controller's memory resources
733 * - Find out all initialization data
734 * - Allocate memory required for all the commands
735 * - Use internal library of FW routines, build up complete soft state
736 */
737 static int __devinit
738 megaraid_init_mbox(adapter_t *adapter)
739 {
740 struct pci_dev *pdev;
741 mraid_device_t *raid_dev;
742 int i;
743 uint32_t magic64;
744
745
746 adapter->ito = MBOX_TIMEOUT;
747 pdev = adapter->pdev;
748
749 /*
750 * Allocate and initialize the init data structure for mailbox
751 * controllers
752 */
753 raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL);
754 if (raid_dev == NULL) return -1;
755
756
757 /*
758 * Attach the adapter soft state to raid device soft state
759 */
760 adapter->raid_device = (caddr_t)raid_dev;
761 raid_dev->fast_load = megaraid_fast_load;
762
763
764 // our baseport
765 raid_dev->baseport = pci_resource_start(pdev, 0);
766
767 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
768
769 con_log(CL_ANN, (KERN_WARNING
770 "megaraid: mem region busy\n"));
771
772 goto out_free_raid_dev;
773 }
774
775 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
776
777 if (!raid_dev->baseaddr) {
778
779 con_log(CL_ANN, (KERN_WARNING
780 "megaraid: could not map hba memory\n") );
781
782 goto out_release_regions;
783 }
784
785 /* initialize the mutual exclusion lock for the mailbox */
786 spin_lock_init(&raid_dev->mailbox_lock);
787
788 /* allocate memory required for commands */
789 if (megaraid_alloc_cmd_packets(adapter) != 0)
790 goto out_iounmap;
791
792 /*
793 * Issue SYNC cmd to flush the pending cmds in the adapter
794 * and initialize its internal state
795 */
796
797 if (megaraid_mbox_fire_sync_cmd(adapter))
798 con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
799
800 /*
801 * Setup the rest of the soft state using the library of
802 * FW routines
803 */
804
805 /* request IRQ and register the interrupt service routine */
806 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
807 adapter)) {
808
809 con_log(CL_ANN, (KERN_WARNING
810 "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
811 goto out_alloc_cmds;
812
813 }
814
815 // Product info
816 if (megaraid_mbox_product_info(adapter) != 0)
817 goto out_free_irq;
818
819 // Do we support extended CDBs
820 adapter->max_cdb_sz = 10;
821 if (megaraid_mbox_extended_cdb(adapter) == 0) {
822 adapter->max_cdb_sz = 16;
823 }
824
825 /*
826 * Do we support cluster environment, if we do, what is the initiator
827 * id.
828 * NOTE: In a non-cluster aware firmware environment, the LLD should
829 * return 7 as initiator id.
830 */
831 adapter->ha = 0;
832 adapter->init_id = -1;
833 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
834 adapter->ha = 1;
835 }
836
837 /*
838 * Prepare the device ids array to have the mapping between the kernel
839 * device address and megaraid device address.
840 * We export the physical devices on their actual addresses. The
841 * logical drives are exported on a virtual SCSI channel
842 */
843 megaraid_mbox_setup_device_map(adapter);
844
845 // If the firmware supports random deletion, update the device id map
846 if (megaraid_mbox_support_random_del(adapter)) {
847
848 // Change the logical drives numbers in device_ids array one
849 // slot in device_ids is reserved for target id, that's why
850 // "<=" below
851 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
852 adapter->device_ids[adapter->max_channel][i] += 0x80;
853 }
854 adapter->device_ids[adapter->max_channel][adapter->init_id] =
855 0xFF;
856
857 raid_dev->random_del_supported = 1;
858 }
859
860 /*
861 * find out the maximum number of scatter-gather elements supported by
862 * this firmware
863 */
864 adapter->sglen = megaraid_mbox_get_max_sg(adapter);
865
866 // enumerate RAID and SCSI channels so that all devices on SCSI
867 // channels can later be exported, including disk devices
868 megaraid_mbox_enum_raid_scsi(adapter);
869
870 /*
871 * Other parameters required by upper layer
872 *
873 * maximum number of sectors per IO command
874 */
875 adapter->max_sectors = megaraid_max_sectors;
876
877 /*
878 * number of queued commands per LUN.
879 */
880 adapter->cmd_per_lun = megaraid_cmd_per_lun;
881
882 /*
883 * Allocate resources required to issue FW calls, when sysfs is
884 * accessed
885 */
886 if (megaraid_sysfs_alloc_resources(adapter) != 0)
887 goto out_free_irq;
888
889 // Set the DMA mask to 64-bit. All supported controllers as capable of
890 // DMA in this range
891 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
892
893 if (((magic64 == HBA_SIGNATURE_64_BIT) &&
894 ((adapter->pdev->subsystem_device !=
895 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
896 (adapter->pdev->subsystem_device !=
897 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
898 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
899 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
900 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
901 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
902 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
903 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
904 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
905 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
906 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
907 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
908 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(64))) {
909 con_log(CL_ANN, (KERN_WARNING
910 "megaraid: DMA mask for 64-bit failed\n"));
911
912 if (pci_set_dma_mask (adapter->pdev, DMA_BIT_MASK(32))) {
913 con_log(CL_ANN, (KERN_WARNING
914 "megaraid: 32-bit DMA mask failed\n"));
915 goto out_free_sysfs_res;
916 }
917 }
918 }
919
920 // setup tasklet for DPC
921 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
922 (unsigned long)adapter);
923
924 con_log(CL_DLEVEL1, (KERN_INFO
925 "megaraid mbox hba successfully initialized\n"));
926
927 return 0;
928
929 out_free_sysfs_res:
930 megaraid_sysfs_free_resources(adapter);
931 out_free_irq:
932 free_irq(adapter->irq, adapter);
933 out_alloc_cmds:
934 megaraid_free_cmd_packets(adapter);
935 out_iounmap:
936 iounmap(raid_dev->baseaddr);
937 out_release_regions:
938 pci_release_regions(pdev);
939 out_free_raid_dev:
940 kfree(raid_dev);
941
942 return -1;
943 }
944
945
946 /**
947 * megaraid_fini_mbox - undo controller initialization
948 * @adapter : our soft state
949 */
950 static void
951 megaraid_fini_mbox(adapter_t *adapter)
952 {
953 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
954
955 // flush all caches
956 megaraid_mbox_flush_cache(adapter);
957
958 tasklet_kill(&adapter->dpc_h);
959
960 megaraid_sysfs_free_resources(adapter);
961
962 megaraid_free_cmd_packets(adapter);
963
964 free_irq(adapter->irq, adapter);
965
966 iounmap(raid_dev->baseaddr);
967
968 pci_release_regions(adapter->pdev);
969
970 kfree(raid_dev);
971
972 return;
973 }
974
975
976 /**
977 * megaraid_alloc_cmd_packets - allocate shared mailbox
978 * @adapter : soft state of the raid controller
979 *
980 * Allocate and align the shared mailbox. This maibox is used to issue
981 * all the commands. For IO based controllers, the mailbox is also regsitered
982 * with the FW. Allocate memory for all commands as well.
983 * This is our big allocator.
984 */
985 static int
986 megaraid_alloc_cmd_packets(adapter_t *adapter)
987 {
988 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
989 struct pci_dev *pdev;
990 unsigned long align;
991 scb_t *scb;
992 mbox_ccb_t *ccb;
993 struct mraid_pci_blk *epthru_pci_blk;
994 struct mraid_pci_blk *sg_pci_blk;
995 struct mraid_pci_blk *mbox_pci_blk;
996 int i;
997
998 pdev = adapter->pdev;
999
1000 /*
1001 * Setup the mailbox
1002 * Allocate the common 16-byte aligned memory for the handshake
1003 * mailbox.
1004 */
1005 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
1006 sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
1007
1008 if (!raid_dev->una_mbox64) {
1009 con_log(CL_ANN, (KERN_WARNING
1010 "megaraid: out of memory, %s %d\n", __func__,
1011 __LINE__));
1012 return -1;
1013 }
1014 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
1015
1016 /*
1017 * Align the mailbox at 16-byte boundary
1018 */
1019 raid_dev->mbox = &raid_dev->una_mbox64->mbox32;
1020
1021 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
1022 (~0UL ^ 0xFUL));
1023
1024 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
1025
1026 align = ((void *)raid_dev->mbox -
1027 ((void *)&raid_dev->una_mbox64->mbox32));
1028
1029 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1030 align;
1031
1032 // Allocate memory for commands issued internally
1033 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
1034 &adapter->ibuf_dma_h);
1035 if (!adapter->ibuf) {
1036
1037 con_log(CL_ANN, (KERN_WARNING
1038 "megaraid: out of memory, %s %d\n", __func__,
1039 __LINE__));
1040
1041 goto out_free_common_mbox;
1042 }
1043 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
1044
1045 // Allocate memory for our SCSI Command Blocks and their associated
1046 // memory
1047
1048 /*
1049 * Allocate memory for the base list of scb. Later allocate memory for
1050 * CCBs and embedded components of each CCB and point the pointers in
1051 * scb to the allocated components
1052 * NOTE: The code to allocate SCB will be duplicated in all the LLD
1053 * since the calling routine does not yet know the number of available
1054 * commands.
1055 */
1056 adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL);
1057
1058 if (adapter->kscb_list == NULL) {
1059 con_log(CL_ANN, (KERN_WARNING
1060 "megaraid: out of memory, %s %d\n", __func__,
1061 __LINE__));
1062 goto out_free_ibuf;
1063 }
1064
1065 // memory allocation for our command packets
1066 if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1067 con_log(CL_ANN, (KERN_WARNING
1068 "megaraid: out of memory, %s %d\n", __func__,
1069 __LINE__));
1070 goto out_free_scb_list;
1071 }
1072
1073 // Adjust the scb pointers and link in the free pool
1074 epthru_pci_blk = raid_dev->epthru_pool;
1075 sg_pci_blk = raid_dev->sg_pool;
1076 mbox_pci_blk = raid_dev->mbox_pool;
1077
1078 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1079 scb = adapter->kscb_list + i;
1080 ccb = raid_dev->ccb_list + i;
1081
1082 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1083 ccb->raw_mbox = (uint8_t *)ccb->mbox;
1084 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1085 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1086
1087 // make sure the mailbox is aligned properly
1088 if (ccb->mbox_dma_h & 0x0F) {
1089 con_log(CL_ANN, (KERN_CRIT
1090 "megaraid mbox: not aligned on 16-bytes\n"));
1091
1092 goto out_teardown_dma_pools;
1093 }
1094
1095 ccb->epthru = (mraid_epassthru_t *)
1096 epthru_pci_blk[i].vaddr;
1097 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr;
1098 ccb->pthru = (mraid_passthru_t *)ccb->epthru;
1099 ccb->pthru_dma_h = ccb->epthru_dma_h;
1100
1101
1102 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1103 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr;
1104 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64;
1105
1106 scb->ccb = (caddr_t)ccb;
1107 scb->gp = 0;
1108
1109 scb->sno = i; // command index
1110
1111 scb->scp = NULL;
1112 scb->state = SCB_FREE;
1113 scb->dma_direction = PCI_DMA_NONE;
1114 scb->dma_type = MRAID_DMA_NONE;
1115 scb->dev_channel = -1;
1116 scb->dev_target = -1;
1117
1118 // put scb in the free pool
1119 list_add_tail(&scb->list, &adapter->kscb_pool);
1120 }
1121
1122 return 0;
1123
1124 out_teardown_dma_pools:
1125 megaraid_mbox_teardown_dma_pools(adapter);
1126 out_free_scb_list:
1127 kfree(adapter->kscb_list);
1128 out_free_ibuf:
1129 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1130 adapter->ibuf_dma_h);
1131 out_free_common_mbox:
1132 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1133 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1134
1135 return -1;
1136 }
1137
1138
1139 /**
1140 * megaraid_free_cmd_packets - free memory
1141 * @adapter : soft state of the raid controller
1142 *
1143 * Release memory resources allocated for commands.
1144 */
1145 static void
1146 megaraid_free_cmd_packets(adapter_t *adapter)
1147 {
1148 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1149
1150 megaraid_mbox_teardown_dma_pools(adapter);
1151
1152 kfree(adapter->kscb_list);
1153
1154 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1155 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1156
1157 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1158 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1159 return;
1160 }
1161
1162
1163 /**
1164 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1165 * @adapter : HBA soft state
1166 *
1167 * Setup the dma pools for mailbox, passthru and extended passthru structures,
1168 * and scatter-gather lists.
1169 */
1170 static int
1171 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1172 {
1173 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1174 struct mraid_pci_blk *epthru_pci_blk;
1175 struct mraid_pci_blk *sg_pci_blk;
1176 struct mraid_pci_blk *mbox_pci_blk;
1177 int i;
1178
1179
1180
1181 // Allocate memory for 16-bytes aligned mailboxes
1182 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1183 adapter->pdev,
1184 sizeof(mbox64_t) + 16,
1185 16, 0);
1186
1187 if (raid_dev->mbox_pool_handle == NULL) {
1188 goto fail_setup_dma_pool;
1189 }
1190
1191 mbox_pci_blk = raid_dev->mbox_pool;
1192 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1193 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1194 raid_dev->mbox_pool_handle,
1195 GFP_KERNEL,
1196 &mbox_pci_blk[i].dma_addr);
1197 if (!mbox_pci_blk[i].vaddr) {
1198 goto fail_setup_dma_pool;
1199 }
1200 }
1201
1202 /*
1203 * Allocate memory for each embedded passthru strucuture pointer
1204 * Request for a 128 bytes aligned structure for each passthru command
1205 * structure
1206 * Since passthru and extended passthru commands are exclusive, they
1207 * share common memory pool. Passthru structures piggyback on memory
1208 * allocted to extended passthru since passthru is smaller of the two
1209 */
1210 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1211 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1212
1213 if (raid_dev->epthru_pool_handle == NULL) {
1214 goto fail_setup_dma_pool;
1215 }
1216
1217 epthru_pci_blk = raid_dev->epthru_pool;
1218 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1219 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1220 raid_dev->epthru_pool_handle,
1221 GFP_KERNEL,
1222 &epthru_pci_blk[i].dma_addr);
1223 if (!epthru_pci_blk[i].vaddr) {
1224 goto fail_setup_dma_pool;
1225 }
1226 }
1227
1228
1229 // Allocate memory for each scatter-gather list. Request for 512 bytes
1230 // alignment for each sg list
1231 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1232 adapter->pdev,
1233 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1234 512, 0);
1235
1236 if (raid_dev->sg_pool_handle == NULL) {
1237 goto fail_setup_dma_pool;
1238 }
1239
1240 sg_pci_blk = raid_dev->sg_pool;
1241 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1242 sg_pci_blk[i].vaddr = pci_pool_alloc(
1243 raid_dev->sg_pool_handle,
1244 GFP_KERNEL,
1245 &sg_pci_blk[i].dma_addr);
1246 if (!sg_pci_blk[i].vaddr) {
1247 goto fail_setup_dma_pool;
1248 }
1249 }
1250
1251 return 0;
1252
1253 fail_setup_dma_pool:
1254 megaraid_mbox_teardown_dma_pools(adapter);
1255 return -1;
1256 }
1257
1258
1259 /**
1260 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1261 * @adapter : HBA soft state
1262 *
1263 * Teardown the dma pool for mailbox, passthru and extended passthru
1264 * structures, and scatter-gather lists.
1265 */
1266 static void
1267 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1268 {
1269 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1270 struct mraid_pci_blk *epthru_pci_blk;
1271 struct mraid_pci_blk *sg_pci_blk;
1272 struct mraid_pci_blk *mbox_pci_blk;
1273 int i;
1274
1275
1276 sg_pci_blk = raid_dev->sg_pool;
1277 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1278 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1279 sg_pci_blk[i].dma_addr);
1280 }
1281 if (raid_dev->sg_pool_handle)
1282 pci_pool_destroy(raid_dev->sg_pool_handle);
1283
1284
1285 epthru_pci_blk = raid_dev->epthru_pool;
1286 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1287 pci_pool_free(raid_dev->epthru_pool_handle,
1288 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1289 }
1290 if (raid_dev->epthru_pool_handle)
1291 pci_pool_destroy(raid_dev->epthru_pool_handle);
1292
1293
1294 mbox_pci_blk = raid_dev->mbox_pool;
1295 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1296 pci_pool_free(raid_dev->mbox_pool_handle,
1297 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1298 }
1299 if (raid_dev->mbox_pool_handle)
1300 pci_pool_destroy(raid_dev->mbox_pool_handle);
1301
1302 return;
1303 }
1304
1305
1306 /**
1307 * megaraid_alloc_scb - detach and return a scb from the free list
1308 * @adapter : controller's soft state
1309 * @scp : pointer to the scsi command to be executed
1310 *
1311 * Return the scb from the head of the free list. %NULL if there are none
1312 * available.
1313 */
1314 static scb_t *
1315 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1316 {
1317 struct list_head *head = &adapter->kscb_pool;
1318 scb_t *scb = NULL;
1319 unsigned long flags;
1320
1321 // detach scb from free pool
1322 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1323
1324 if (list_empty(head)) {
1325 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1326 return NULL;
1327 }
1328
1329 scb = list_entry(head->next, scb_t, list);
1330 list_del_init(&scb->list);
1331
1332 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1333
1334 scb->state = SCB_ACTIVE;
1335 scb->scp = scp;
1336 scb->dma_type = MRAID_DMA_NONE;
1337
1338 return scb;
1339 }
1340
1341
1342 /**
1343 * megaraid_dealloc_scb - return the scb to the free pool
1344 * @adapter : controller's soft state
1345 * @scb : scb to be freed
1346 *
1347 * Return the scb back to the free list of scbs. The caller must 'flush' the
1348 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1349 * NOTE NOTE: Make sure the scb is not on any list before calling this
1350 * routine.
1351 */
1352 static inline void
1353 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1354 {
1355 unsigned long flags;
1356
1357 // put scb in the free pool
1358 scb->state = SCB_FREE;
1359 scb->scp = NULL;
1360 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1361
1362 list_add(&scb->list, &adapter->kscb_pool);
1363
1364 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1365
1366 return;
1367 }
1368
1369
1370 /**
1371 * megaraid_mbox_mksgl - make the scatter-gather list
1372 * @adapter : controller's soft state
1373 * @scb : scsi control block
1374 *
1375 * Prepare the scatter-gather list.
1376 */
1377 static int
1378 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1379 {
1380 struct scatterlist *sgl;
1381 mbox_ccb_t *ccb;
1382 struct scsi_cmnd *scp;
1383 int sgcnt;
1384 int i;
1385
1386
1387 scp = scb->scp;
1388 ccb = (mbox_ccb_t *)scb->ccb;
1389
1390 sgcnt = scsi_dma_map(scp);
1391 BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen);
1392
1393 // no mapping required if no data to be transferred
1394 if (!sgcnt)
1395 return 0;
1396
1397 scb->dma_type = MRAID_DMA_WSG;
1398
1399 scsi_for_each_sg(scp, sgl, sgcnt, i) {
1400 ccb->sgl64[i].address = sg_dma_address(sgl);
1401 ccb->sgl64[i].length = sg_dma_len(sgl);
1402 }
1403
1404 // Return count of SG nodes
1405 return sgcnt;
1406 }
1407
1408
1409 /**
1410 * mbox_post_cmd - issue a mailbox command
1411 * @adapter : controller's soft state
1412 * @scb : command to be issued
1413 *
1414 * Post the command to the controller if mailbox is available.
1415 */
1416 static int
1417 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1418 {
1419 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1420 mbox64_t *mbox64;
1421 mbox_t *mbox;
1422 mbox_ccb_t *ccb;
1423 unsigned long flags;
1424 unsigned int i = 0;
1425
1426
1427 ccb = (mbox_ccb_t *)scb->ccb;
1428 mbox = raid_dev->mbox;
1429 mbox64 = raid_dev->mbox64;
1430
1431 /*
1432 * Check for busy mailbox. If it is, return failure - the caller
1433 * should retry later.
1434 */
1435 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1436
1437 if (unlikely(mbox->busy)) {
1438 do {
1439 udelay(1);
1440 i++;
1441 rmb();
1442 } while(mbox->busy && (i < max_mbox_busy_wait));
1443
1444 if (mbox->busy) {
1445
1446 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1447
1448 return -1;
1449 }
1450 }
1451
1452
1453 // Copy this command's mailbox data into "adapter's" mailbox
1454 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1455 mbox->cmdid = scb->sno;
1456
1457 adapter->outstanding_cmds++;
1458
1459 if (scb->dma_direction == PCI_DMA_TODEVICE)
1460 pci_dma_sync_sg_for_device(adapter->pdev,
1461 scsi_sglist(scb->scp),
1462 scsi_sg_count(scb->scp),
1463 PCI_DMA_TODEVICE);
1464
1465 mbox->busy = 1; // Set busy
1466 mbox->poll = 0;
1467 mbox->ack = 0;
1468 wmb();
1469
1470 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1471
1472 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1473
1474 return 0;
1475 }
1476
1477
1478 /**
1479 * megaraid_queue_command - generic queue entry point for all LLDs
1480 * @scp : pointer to the scsi command to be executed
1481 * @done : callback routine to be called after the cmd has be completed
1482 *
1483 * Queue entry point for mailbox based controllers.
1484 */
1485 static int
1486 megaraid_queue_command(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *))
1487 {
1488 adapter_t *adapter;
1489 scb_t *scb;
1490 int if_busy;
1491
1492 adapter = SCP2ADAPTER(scp);
1493 scp->scsi_done = done;
1494 scp->result = 0;
1495
1496 /*
1497 * Allocate and build a SCB request
1498 * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1499 * not allocate scb. We will return non-zero status in that case.
1500 * NOTE: scb can be null even though certain commands completed
1501 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1502 * return 0 in that case, and we would do the callback right away.
1503 */
1504 if_busy = 0;
1505 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1506 if (!scb) { // command already completed
1507 done(scp);
1508 return 0;
1509 }
1510
1511 megaraid_mbox_runpendq(adapter, scb);
1512 return if_busy;
1513 }
1514
1515 /**
1516 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
1517 * @adapter : controller's soft state
1518 * @scp : mid-layer scsi command pointer
1519 * @busy : set if request could not be completed because of lack of
1520 * resources
1521 *
1522 * Transform the mid-layer scsi command to megaraid firmware lingua.
1523 * Convert the command issued by mid-layer to format understood by megaraid
1524 * firmware. We also complete certain commands without sending them to firmware.
1525 */
1526 static scb_t *
1527 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1528 {
1529 mraid_device_t *rdev = ADAP2RAIDDEV(adapter);
1530 int channel;
1531 int target;
1532 int islogical;
1533 mbox_ccb_t *ccb;
1534 mraid_passthru_t *pthru;
1535 mbox64_t *mbox64;
1536 mbox_t *mbox;
1537 scb_t *scb;
1538 char skip[] = "skipping";
1539 char scan[] = "scanning";
1540 char *ss;
1541
1542
1543 /*
1544 * Get the appropriate device map for the device this command is
1545 * intended for
1546 */
1547 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1548
1549 /*
1550 * Logical drive commands
1551 */
1552 if (islogical) {
1553 switch (scp->cmnd[0]) {
1554 case TEST_UNIT_READY:
1555 /*
1556 * Do we support clustering and is the support enabled
1557 * If no, return success always
1558 */
1559 if (!adapter->ha) {
1560 scp->result = (DID_OK << 16);
1561 return NULL;
1562 }
1563
1564 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1565 scp->result = (DID_ERROR << 16);
1566 *busy = 1;
1567 return NULL;
1568 }
1569
1570 scb->dma_direction = scp->sc_data_direction;
1571 scb->dev_channel = 0xFF;
1572 scb->dev_target = target;
1573 ccb = (mbox_ccb_t *)scb->ccb;
1574
1575 /*
1576 * The command id will be provided by the command
1577 * issuance routine
1578 */
1579 ccb->raw_mbox[0] = CLUSTER_CMD;
1580 ccb->raw_mbox[2] = RESERVATION_STATUS;
1581 ccb->raw_mbox[3] = target;
1582
1583 return scb;
1584
1585 case MODE_SENSE:
1586 {
1587 struct scatterlist *sgl;
1588 caddr_t vaddr;
1589
1590 sgl = scsi_sglist(scp);
1591 if (sg_page(sgl)) {
1592 vaddr = (caddr_t) sg_virt(&sgl[0]);
1593
1594 memset(vaddr, 0, scp->cmnd[4]);
1595 }
1596 else {
1597 con_log(CL_ANN, (KERN_WARNING
1598 "megaraid mailbox: invalid sg:%d\n",
1599 __LINE__));
1600 }
1601 }
1602 scp->result = (DID_OK << 16);
1603 return NULL;
1604
1605 case INQUIRY:
1606 /*
1607 * Display the channel scan for logical drives
1608 * Do not display scan for a channel if already done.
1609 */
1610 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1611
1612 con_log(CL_ANN, (KERN_INFO
1613 "scsi[%d]: scanning scsi channel %d",
1614 adapter->host->host_no,
1615 SCP2CHANNEL(scp)));
1616
1617 con_log(CL_ANN, (
1618 " [virtual] for logical drives\n"));
1619
1620 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1621 }
1622
1623 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1624 scp->sense_buffer[0] = 0x70;
1625 scp->sense_buffer[2] = ILLEGAL_REQUEST;
1626 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB;
1627 scp->result = CHECK_CONDITION << 1;
1628 return NULL;
1629 }
1630
1631 /* Fall through */
1632
1633 case READ_CAPACITY:
1634 /*
1635 * Do not allow LUN > 0 for logical drives and
1636 * requests for more than 40 logical drives
1637 */
1638 if (SCP2LUN(scp)) {
1639 scp->result = (DID_BAD_TARGET << 16);
1640 return NULL;
1641 }
1642 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1643 scp->result = (DID_BAD_TARGET << 16);
1644 return NULL;
1645 }
1646
1647
1648 /* Allocate a SCB and initialize passthru */
1649 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1650 scp->result = (DID_ERROR << 16);
1651 *busy = 1;
1652 return NULL;
1653 }
1654
1655 ccb = (mbox_ccb_t *)scb->ccb;
1656 scb->dev_channel = 0xFF;
1657 scb->dev_target = target;
1658 pthru = ccb->pthru;
1659 mbox = ccb->mbox;
1660 mbox64 = ccb->mbox64;
1661
1662 pthru->timeout = 0;
1663 pthru->ars = 1;
1664 pthru->reqsenselen = 14;
1665 pthru->islogical = 1;
1666 pthru->logdrv = target;
1667 pthru->cdblen = scp->cmd_len;
1668 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1669
1670 mbox->cmd = MBOXCMD_PASSTHRU64;
1671 scb->dma_direction = scp->sc_data_direction;
1672
1673 pthru->dataxferlen = scsi_bufflen(scp);
1674 pthru->dataxferaddr = ccb->sgl_dma_h;
1675 pthru->numsge = megaraid_mbox_mksgl(adapter,
1676 scb);
1677
1678 mbox->xferaddr = 0xFFFFFFFF;
1679 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h;
1680 mbox64->xferaddr_hi = 0;
1681
1682 return scb;
1683
1684 case READ_6:
1685 case WRITE_6:
1686 case READ_10:
1687 case WRITE_10:
1688 case READ_12:
1689 case WRITE_12:
1690
1691 /*
1692 * Allocate a SCB and initialize mailbox
1693 */
1694 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1695 scp->result = (DID_ERROR << 16);
1696 *busy = 1;
1697 return NULL;
1698 }
1699 ccb = (mbox_ccb_t *)scb->ccb;
1700 scb->dev_channel = 0xFF;
1701 scb->dev_target = target;
1702 mbox = ccb->mbox;
1703 mbox64 = ccb->mbox64;
1704 mbox->logdrv = target;
1705
1706 /*
1707 * A little HACK: 2nd bit is zero for all scsi read
1708 * commands and is set for all scsi write commands
1709 */
1710 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64:
1711 MBOXCMD_LREAD64 ;
1712
1713 /*
1714 * 6-byte READ(0x08) or WRITE(0x0A) cdb
1715 */
1716 if (scp->cmd_len == 6) {
1717 mbox->numsectors = (uint32_t)scp->cmnd[4];
1718 mbox->lba =
1719 ((uint32_t)scp->cmnd[1] << 16) |
1720 ((uint32_t)scp->cmnd[2] << 8) |
1721 (uint32_t)scp->cmnd[3];
1722
1723 mbox->lba &= 0x1FFFFF;
1724 }
1725
1726 /*
1727 * 10-byte READ(0x28) or WRITE(0x2A) cdb
1728 */
1729 else if (scp->cmd_len == 10) {
1730 mbox->numsectors =
1731 (uint32_t)scp->cmnd[8] |
1732 ((uint32_t)scp->cmnd[7] << 8);
1733 mbox->lba =
1734 ((uint32_t)scp->cmnd[2] << 24) |
1735 ((uint32_t)scp->cmnd[3] << 16) |
1736 ((uint32_t)scp->cmnd[4] << 8) |
1737 (uint32_t)scp->cmnd[5];
1738 }
1739
1740 /*
1741 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1742 */
1743 else if (scp->cmd_len == 12) {
1744 mbox->lba =
1745 ((uint32_t)scp->cmnd[2] << 24) |
1746 ((uint32_t)scp->cmnd[3] << 16) |
1747 ((uint32_t)scp->cmnd[4] << 8) |
1748 (uint32_t)scp->cmnd[5];
1749
1750 mbox->numsectors =
1751 ((uint32_t)scp->cmnd[6] << 24) |
1752 ((uint32_t)scp->cmnd[7] << 16) |
1753 ((uint32_t)scp->cmnd[8] << 8) |
1754 (uint32_t)scp->cmnd[9];
1755 }
1756 else {
1757 con_log(CL_ANN, (KERN_WARNING
1758 "megaraid: unsupported CDB length\n"));
1759
1760 megaraid_dealloc_scb(adapter, scb);
1761
1762 scp->result = (DID_ERROR << 16);
1763 return NULL;
1764 }
1765
1766 scb->dma_direction = scp->sc_data_direction;
1767
1768 // Calculate Scatter-Gather info
1769 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h;
1770 mbox->numsge = megaraid_mbox_mksgl(adapter,
1771 scb);
1772 mbox->xferaddr = 0xFFFFFFFF;
1773 mbox64->xferaddr_hi = 0;
1774
1775 return scb;
1776
1777 case RESERVE:
1778 case RELEASE:
1779 /*
1780 * Do we support clustering and is the support enabled
1781 */
1782 if (!adapter->ha) {
1783 scp->result = (DID_BAD_TARGET << 16);
1784 return NULL;
1785 }
1786
1787 /*
1788 * Allocate a SCB and initialize mailbox
1789 */
1790 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1791 scp->result = (DID_ERROR << 16);
1792 *busy = 1;
1793 return NULL;
1794 }
1795
1796 ccb = (mbox_ccb_t *)scb->ccb;
1797 scb->dev_channel = 0xFF;
1798 scb->dev_target = target;
1799 ccb->raw_mbox[0] = CLUSTER_CMD;
1800 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ?
1801 RESERVE_LD : RELEASE_LD;
1802
1803 ccb->raw_mbox[3] = target;
1804 scb->dma_direction = scp->sc_data_direction;
1805
1806 return scb;
1807
1808 default:
1809 scp->result = (DID_BAD_TARGET << 16);
1810 return NULL;
1811 }
1812 }
1813 else { // Passthru device commands
1814
1815 // Do not allow access to target id > 15 or LUN > 7
1816 if (target > 15 || SCP2LUN(scp) > 7) {
1817 scp->result = (DID_BAD_TARGET << 16);
1818 return NULL;
1819 }
1820
1821 // if fast load option was set and scan for last device is
1822 // over, reset the fast_load flag so that during a possible
1823 // next scan, devices can be made available
1824 if (rdev->fast_load && (target == 15) &&
1825 (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1826
1827 con_log(CL_ANN, (KERN_INFO
1828 "megaraid[%d]: physical device scan re-enabled\n",
1829 adapter->host->host_no));
1830 rdev->fast_load = 0;
1831 }
1832
1833 /*
1834 * Display the channel scan for physical devices
1835 */
1836 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1837
1838 ss = rdev->fast_load ? skip : scan;
1839
1840 con_log(CL_ANN, (KERN_INFO
1841 "scsi[%d]: %s scsi channel %d [Phy %d]",
1842 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1843 channel));
1844
1845 con_log(CL_ANN, (
1846 " for non-raid devices\n"));
1847
1848 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1849 }
1850
1851 // disable channel sweep if fast load option given
1852 if (rdev->fast_load) {
1853 scp->result = (DID_BAD_TARGET << 16);
1854 return NULL;
1855 }
1856
1857 // Allocate a SCB and initialize passthru
1858 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1859 scp->result = (DID_ERROR << 16);
1860 *busy = 1;
1861 return NULL;
1862 }
1863
1864 ccb = (mbox_ccb_t *)scb->ccb;
1865 scb->dev_channel = channel;
1866 scb->dev_target = target;
1867 scb->dma_direction = scp->sc_data_direction;
1868 mbox = ccb->mbox;
1869 mbox64 = ccb->mbox64;
1870
1871 // Does this firmware support extended CDBs
1872 if (adapter->max_cdb_sz == 16) {
1873 mbox->cmd = MBOXCMD_EXTPTHRU;
1874
1875 megaraid_mbox_prepare_epthru(adapter, scb, scp);
1876
1877 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h;
1878 mbox64->xferaddr_hi = 0;
1879 mbox->xferaddr = 0xFFFFFFFF;
1880 }
1881 else {
1882 mbox->cmd = MBOXCMD_PASSTHRU64;
1883
1884 megaraid_mbox_prepare_pthru(adapter, scb, scp);
1885
1886 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h;
1887 mbox64->xferaddr_hi = 0;
1888 mbox->xferaddr = 0xFFFFFFFF;
1889 }
1890 return scb;
1891 }
1892
1893 // NOT REACHED
1894 }
1895
1896
1897 /**
1898 * megaraid_mbox_runpendq - execute commands queued in the pending queue
1899 * @adapter : controller's soft state
1900 * @scb_q : SCB to be queued in the pending list
1901 *
1902 * Scan the pending list for commands which are not yet issued and try to
1903 * post to the controller. The SCB can be a null pointer, which would indicate
1904 * no SCB to be queue, just try to execute the ones in the pending list.
1905 *
1906 * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1907 * out from the head of the pending list. If it is successfully issued, the
1908 * next SCB is at the head now.
1909 */
1910 static void
1911 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1912 {
1913 scb_t *scb;
1914 unsigned long flags;
1915
1916 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1917
1918 if (scb_q) {
1919 scb_q->state = SCB_PENDQ;
1920 list_add_tail(&scb_q->list, &adapter->pend_list);
1921 }
1922
1923 // if the adapter in not in quiescent mode, post the commands to FW
1924 if (adapter->quiescent) {
1925 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1926 return;
1927 }
1928
1929 while (!list_empty(&adapter->pend_list)) {
1930
1931 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1932
1933 scb = list_entry(adapter->pend_list.next, scb_t, list);
1934
1935 // remove the scb from the pending list and try to
1936 // issue. If we are unable to issue it, put back in
1937 // the pending list and return
1938
1939 list_del_init(&scb->list);
1940
1941 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1942
1943 // if mailbox was busy, return SCB back to pending
1944 // list. Make sure to add at the head, since that's
1945 // where it would have been removed from
1946
1947 scb->state = SCB_ISSUED;
1948
1949 if (mbox_post_cmd(adapter, scb) != 0) {
1950
1951 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1952
1953 scb->state = SCB_PENDQ;
1954
1955 list_add(&scb->list, &adapter->pend_list);
1956
1957 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1958 flags);
1959
1960 return;
1961 }
1962
1963 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1964 }
1965
1966 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1967
1968
1969 return;
1970 }
1971
1972
1973 /**
1974 * megaraid_mbox_prepare_pthru - prepare a command for physical devices
1975 * @adapter : pointer to controller's soft state
1976 * @scb : scsi control block
1977 * @scp : scsi command from the mid-layer
1978 *
1979 * Prepare a command for the scsi physical devices.
1980 */
1981 static void
1982 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1983 struct scsi_cmnd *scp)
1984 {
1985 mbox_ccb_t *ccb;
1986 mraid_passthru_t *pthru;
1987 uint8_t channel;
1988 uint8_t target;
1989
1990 ccb = (mbox_ccb_t *)scb->ccb;
1991 pthru = ccb->pthru;
1992 channel = scb->dev_channel;
1993 target = scb->dev_target;
1994
1995 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1996 pthru->timeout = 4;
1997 pthru->ars = 1;
1998 pthru->islogical = 0;
1999 pthru->channel = 0;
2000 pthru->target = (channel << 4) | target;
2001 pthru->logdrv = SCP2LUN(scp);
2002 pthru->reqsenselen = 14;
2003 pthru->cdblen = scp->cmd_len;
2004
2005 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2006
2007 if (scsi_bufflen(scp)) {
2008 pthru->dataxferlen = scsi_bufflen(scp);
2009 pthru->dataxferaddr = ccb->sgl_dma_h;
2010 pthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2011 }
2012 else {
2013 pthru->dataxferaddr = 0;
2014 pthru->dataxferlen = 0;
2015 pthru->numsge = 0;
2016 }
2017 return;
2018 }
2019
2020
2021 /**
2022 * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2023 * @adapter : pointer to controller's soft state
2024 * @scb : scsi control block
2025 * @scp : scsi command from the mid-layer
2026 *
2027 * Prepare a command for the scsi physical devices. This rountine prepares
2028 * commands for devices which can take extended CDBs (>10 bytes).
2029 */
2030 static void
2031 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2032 struct scsi_cmnd *scp)
2033 {
2034 mbox_ccb_t *ccb;
2035 mraid_epassthru_t *epthru;
2036 uint8_t channel;
2037 uint8_t target;
2038
2039 ccb = (mbox_ccb_t *)scb->ccb;
2040 epthru = ccb->epthru;
2041 channel = scb->dev_channel;
2042 target = scb->dev_target;
2043
2044 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2045 epthru->timeout = 4;
2046 epthru->ars = 1;
2047 epthru->islogical = 0;
2048 epthru->channel = 0;
2049 epthru->target = (channel << 4) | target;
2050 epthru->logdrv = SCP2LUN(scp);
2051 epthru->reqsenselen = 14;
2052 epthru->cdblen = scp->cmd_len;
2053
2054 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2055
2056 if (scsi_bufflen(scp)) {
2057 epthru->dataxferlen = scsi_bufflen(scp);
2058 epthru->dataxferaddr = ccb->sgl_dma_h;
2059 epthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2060 }
2061 else {
2062 epthru->dataxferaddr = 0;
2063 epthru->dataxferlen = 0;
2064 epthru->numsge = 0;
2065 }
2066 return;
2067 }
2068
2069
2070 /**
2071 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2072 * @adapter : controller's soft state
2073 *
2074 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
2075 * completed command and put them on the completed list for later processing.
2076 *
2077 * Returns: 1 if the interrupt is valid, 0 otherwise
2078 */
2079 static int
2080 megaraid_ack_sequence(adapter_t *adapter)
2081 {
2082 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2083 mbox_t *mbox;
2084 scb_t *scb;
2085 uint8_t nstatus;
2086 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS];
2087 struct list_head clist;
2088 int handled;
2089 uint32_t dword;
2090 unsigned long flags;
2091 int i, j;
2092
2093
2094 mbox = raid_dev->mbox;
2095
2096 // move the SCBs from the firmware completed array to our local list
2097 INIT_LIST_HEAD(&clist);
2098
2099 // loop till F/W has more commands for us to complete
2100 handled = 0;
2101 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2102 do {
2103 /*
2104 * Check if a valid interrupt is pending. If found, force the
2105 * interrupt line low.
2106 */
2107 dword = RDOUTDOOR(raid_dev);
2108 if (dword != 0x10001234) break;
2109
2110 handled = 1;
2111
2112 WROUTDOOR(raid_dev, 0x10001234);
2113
2114 nstatus = 0;
2115 // wait for valid numstatus to post
2116 for (i = 0; i < 0xFFFFF; i++) {
2117 if (mbox->numstatus != 0xFF) {
2118 nstatus = mbox->numstatus;
2119 break;
2120 }
2121 rmb();
2122 }
2123 mbox->numstatus = 0xFF;
2124
2125 adapter->outstanding_cmds -= nstatus;
2126
2127 for (i = 0; i < nstatus; i++) {
2128
2129 // wait for valid command index to post
2130 for (j = 0; j < 0xFFFFF; j++) {
2131 if (mbox->completed[i] != 0xFF) break;
2132 rmb();
2133 }
2134 completed[i] = mbox->completed[i];
2135 mbox->completed[i] = 0xFF;
2136
2137 if (completed[i] == 0xFF) {
2138 con_log(CL_ANN, (KERN_CRIT
2139 "megaraid: command posting timed out\n"));
2140
2141 BUG();
2142 continue;
2143 }
2144
2145 // Get SCB associated with this command id
2146 if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2147 // a cmm command
2148 scb = adapter->uscb_list + (completed[i] -
2149 MBOX_MAX_SCSI_CMDS);
2150 }
2151 else {
2152 // an os command
2153 scb = adapter->kscb_list + completed[i];
2154 }
2155
2156 scb->status = mbox->status;
2157 list_add_tail(&scb->list, &clist);
2158 }
2159
2160 // Acknowledge interrupt
2161 WRINDOOR(raid_dev, 0x02);
2162
2163 } while(1);
2164
2165 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2166
2167
2168 // put the completed commands in the completed list. DPC would
2169 // complete these commands later
2170 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2171
2172 list_splice(&clist, &adapter->completed_list);
2173
2174 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2175
2176
2177 // schedule the DPC if there is some work for it
2178 if (handled)
2179 tasklet_schedule(&adapter->dpc_h);
2180
2181 return handled;
2182 }
2183
2184
2185 /**
2186 * megaraid_isr - isr for memory based mailbox based controllers
2187 * @irq : irq
2188 * @devp : pointer to our soft state
2189 *
2190 * Interrupt service routine for memory-mapped mailbox controllers.
2191 */
2192 static irqreturn_t
2193 megaraid_isr(int irq, void *devp)
2194 {
2195 adapter_t *adapter = devp;
2196 int handled;
2197
2198 handled = megaraid_ack_sequence(adapter);
2199
2200 /* Loop through any pending requests */
2201 if (!adapter->quiescent) {
2202 megaraid_mbox_runpendq(adapter, NULL);
2203 }
2204
2205 return IRQ_RETVAL(handled);
2206 }
2207
2208
2209 /**
2210 * megaraid_mbox_sync_scb - sync kernel buffers
2211 * @adapter : controller's soft state
2212 * @scb : pointer to the resource packet
2213 *
2214 * DMA sync if required.
2215 */
2216 static void
2217 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2218 {
2219 mbox_ccb_t *ccb;
2220
2221 ccb = (mbox_ccb_t *)scb->ccb;
2222
2223 if (scb->dma_direction == PCI_DMA_FROMDEVICE)
2224 pci_dma_sync_sg_for_cpu(adapter->pdev,
2225 scsi_sglist(scb->scp),
2226 scsi_sg_count(scb->scp),
2227 PCI_DMA_FROMDEVICE);
2228
2229 scsi_dma_unmap(scb->scp);
2230 return;
2231 }
2232
2233
2234 /**
2235 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2236 * @devp : pointer to HBA soft state
2237 *
2238 * Pick up the commands from the completed list and send back to the owners.
2239 * This is a reentrant function and does not assume any locks are held while
2240 * it is being called.
2241 */
2242 static void
2243 megaraid_mbox_dpc(unsigned long devp)
2244 {
2245 adapter_t *adapter = (adapter_t *)devp;
2246 mraid_device_t *raid_dev;
2247 struct list_head clist;
2248 struct scatterlist *sgl;
2249 scb_t *scb;
2250 scb_t *tmp;
2251 struct scsi_cmnd *scp;
2252 mraid_passthru_t *pthru;
2253 mraid_epassthru_t *epthru;
2254 mbox_ccb_t *ccb;
2255 int islogical;
2256 int pdev_index;
2257 int pdev_state;
2258 mbox_t *mbox;
2259 unsigned long flags;
2260 uint8_t c;
2261 int status;
2262 uioc_t *kioc;
2263
2264
2265 if (!adapter) return;
2266
2267 raid_dev = ADAP2RAIDDEV(adapter);
2268
2269 // move the SCBs from the completed list to our local list
2270 INIT_LIST_HEAD(&clist);
2271
2272 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2273
2274 list_splice_init(&adapter->completed_list, &clist);
2275
2276 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2277
2278
2279 list_for_each_entry_safe(scb, tmp, &clist, list) {
2280
2281 status = scb->status;
2282 scp = scb->scp;
2283 ccb = (mbox_ccb_t *)scb->ccb;
2284 pthru = ccb->pthru;
2285 epthru = ccb->epthru;
2286 mbox = ccb->mbox;
2287
2288 // Make sure f/w has completed a valid command
2289 if (scb->state != SCB_ISSUED) {
2290 con_log(CL_ANN, (KERN_CRIT
2291 "megaraid critical err: invalid command %d:%d:%p\n",
2292 scb->sno, scb->state, scp));
2293 BUG();
2294 continue; // Must never happen!
2295 }
2296
2297 // check for the management command and complete it right away
2298 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2299 scb->state = SCB_FREE;
2300 scb->status = status;
2301
2302 // remove from local clist
2303 list_del_init(&scb->list);
2304
2305 kioc = (uioc_t *)scb->gp;
2306 kioc->status = 0;
2307
2308 megaraid_mbox_mm_done(adapter, scb);
2309
2310 continue;
2311 }
2312
2313 // Was an abort issued for this command earlier
2314 if (scb->state & SCB_ABORT) {
2315 con_log(CL_ANN, (KERN_NOTICE
2316 "megaraid: aborted cmd %lx[%x] completed\n",
2317 scp->serial_number, scb->sno));
2318 }
2319
2320 /*
2321 * If the inquiry came of a disk drive which is not part of
2322 * any RAID array, expose it to the kernel. For this to be
2323 * enabled, user must set the "megaraid_expose_unconf_disks"
2324 * flag to 1 by specifying it on module parameter list.
2325 * This would enable data migration off drives from other
2326 * configurations.
2327 */
2328 islogical = MRAID_IS_LOGICAL(adapter, scp);
2329 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2330 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2331
2332 sgl = scsi_sglist(scp);
2333 if (sg_page(sgl)) {
2334 c = *(unsigned char *) sg_virt(&sgl[0]);
2335 } else {
2336 con_log(CL_ANN, (KERN_WARNING
2337 "megaraid mailbox: invalid sg:%d\n",
2338 __LINE__));
2339 c = 0;
2340 }
2341
2342 if ((c & 0x1F ) == TYPE_DISK) {
2343 pdev_index = (scb->dev_channel * 16) +
2344 scb->dev_target;
2345 pdev_state =
2346 raid_dev->pdrv_state[pdev_index] & 0x0F;
2347
2348 if (pdev_state == PDRV_ONLINE ||
2349 pdev_state == PDRV_FAILED ||
2350 pdev_state == PDRV_RBLD ||
2351 pdev_state == PDRV_HOTSPARE ||
2352 megaraid_expose_unconf_disks == 0) {
2353
2354 status = 0xF0;
2355 }
2356 }
2357 }
2358
2359 // Convert MegaRAID status to Linux error code
2360 switch (status) {
2361
2362 case 0x00:
2363
2364 scp->result = (DID_OK << 16);
2365 break;
2366
2367 case 0x02:
2368
2369 /* set sense_buffer and result fields */
2370 if (mbox->cmd == MBOXCMD_PASSTHRU ||
2371 mbox->cmd == MBOXCMD_PASSTHRU64) {
2372
2373 memcpy(scp->sense_buffer, pthru->reqsensearea,
2374 14);
2375
2376 scp->result = DRIVER_SENSE << 24 |
2377 DID_OK << 16 | CHECK_CONDITION << 1;
2378 }
2379 else {
2380 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2381
2382 memcpy(scp->sense_buffer,
2383 epthru->reqsensearea, 14);
2384
2385 scp->result = DRIVER_SENSE << 24 |
2386 DID_OK << 16 |
2387 CHECK_CONDITION << 1;
2388 } else {
2389 scp->sense_buffer[0] = 0x70;
2390 scp->sense_buffer[2] = ABORTED_COMMAND;
2391 scp->result = CHECK_CONDITION << 1;
2392 }
2393 }
2394 break;
2395
2396 case 0x08:
2397
2398 scp->result = DID_BUS_BUSY << 16 | status;
2399 break;
2400
2401 default:
2402
2403 /*
2404 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2405 * failed
2406 */
2407 if (scp->cmnd[0] == TEST_UNIT_READY) {
2408 scp->result = DID_ERROR << 16 |
2409 RESERVATION_CONFLICT << 1;
2410 }
2411 else
2412 /*
2413 * Error code returned is 1 if Reserve or Release
2414 * failed or the input parameter is invalid
2415 */
2416 if (status == 1 && (scp->cmnd[0] == RESERVE ||
2417 scp->cmnd[0] == RELEASE)) {
2418
2419 scp->result = DID_ERROR << 16 |
2420 RESERVATION_CONFLICT << 1;
2421 }
2422 else {
2423 scp->result = DID_BAD_TARGET << 16 | status;
2424 }
2425 }
2426
2427 // print a debug message for all failed commands
2428 if (status) {
2429 megaraid_mbox_display_scb(adapter, scb);
2430 }
2431
2432 // Free our internal resources and call the mid-layer callback
2433 // routine
2434 megaraid_mbox_sync_scb(adapter, scb);
2435
2436 // remove from local clist
2437 list_del_init(&scb->list);
2438
2439 // put back in free list
2440 megaraid_dealloc_scb(adapter, scb);
2441
2442 // send the scsi packet back to kernel
2443 scp->scsi_done(scp);
2444 }
2445
2446 return;
2447 }
2448
2449
2450 /**
2451 * megaraid_abort_handler - abort the scsi command
2452 * @scp : command to be aborted
2453 *
2454 * Abort a previous SCSI request. Only commands on the pending list can be
2455 * aborted. All the commands issued to the F/W must complete.
2456 **/
2457 static int
2458 megaraid_abort_handler(struct scsi_cmnd *scp)
2459 {
2460 adapter_t *adapter;
2461 mraid_device_t *raid_dev;
2462 scb_t *scb;
2463 scb_t *tmp;
2464 int found;
2465 unsigned long flags;
2466 int i;
2467
2468
2469 adapter = SCP2ADAPTER(scp);
2470 raid_dev = ADAP2RAIDDEV(adapter);
2471
2472 con_log(CL_ANN, (KERN_WARNING
2473 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2474 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2475 SCP2TARGET(scp), SCP2LUN(scp)));
2476
2477 // If FW has stopped responding, simply return failure
2478 if (raid_dev->hw_error) {
2479 con_log(CL_ANN, (KERN_NOTICE
2480 "megaraid: hw error, not aborting\n"));
2481 return FAILED;
2482 }
2483
2484 // There might a race here, where the command was completed by the
2485 // firmware and now it is on the completed list. Before we could
2486 // complete the command to the kernel in dpc, the abort came.
2487 // Find out if this is the case to avoid the race.
2488 scb = NULL;
2489 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2490 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2491
2492 if (scb->scp == scp) { // Found command
2493
2494 list_del_init(&scb->list); // from completed list
2495
2496 con_log(CL_ANN, (KERN_WARNING
2497 "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2498 scp->serial_number, scb->sno,
2499 scb->dev_channel, scb->dev_target));
2500
2501 scp->result = (DID_ABORT << 16);
2502 scp->scsi_done(scp);
2503
2504 megaraid_dealloc_scb(adapter, scb);
2505
2506 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2507 flags);
2508
2509 return SUCCESS;
2510 }
2511 }
2512 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2513
2514
2515 // Find out if this command is still on the pending list. If it is and
2516 // was never issued, abort and return success. If the command is owned
2517 // by the firmware, we must wait for it to complete by the FW.
2518 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2519 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2520
2521 if (scb->scp == scp) { // Found command
2522
2523 list_del_init(&scb->list); // from pending list
2524
2525 ASSERT(!(scb->state & SCB_ISSUED));
2526
2527 con_log(CL_ANN, (KERN_WARNING
2528 "megaraid abort: %ld[%d:%d], driver owner\n",
2529 scp->serial_number, scb->dev_channel,
2530 scb->dev_target));
2531
2532 scp->result = (DID_ABORT << 16);
2533 scp->scsi_done(scp);
2534
2535 megaraid_dealloc_scb(adapter, scb);
2536
2537 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2538 flags);
2539
2540 return SUCCESS;
2541 }
2542 }
2543 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2544
2545
2546 // Check do we even own this command, in which case this would be
2547 // owned by the firmware. The only way to locate the FW scb is to
2548 // traverse through the list of all SCB, since driver does not
2549 // maintain these SCBs on any list
2550 found = 0;
2551 spin_lock_irq(&adapter->lock);
2552 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2553 scb = adapter->kscb_list + i;
2554
2555 if (scb->scp == scp) {
2556
2557 found = 1;
2558
2559 if (!(scb->state & SCB_ISSUED)) {
2560 con_log(CL_ANN, (KERN_WARNING
2561 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2562 scp->serial_number, scb->sno, scb->dev_channel,
2563 scb->dev_target));
2564 BUG();
2565 }
2566 else {
2567 con_log(CL_ANN, (KERN_WARNING
2568 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2569 scp->serial_number, scb->sno, scb->dev_channel,
2570 scb->dev_target));
2571 }
2572 }
2573 }
2574 spin_unlock_irq(&adapter->lock);
2575
2576 if (!found) {
2577 con_log(CL_ANN, (KERN_WARNING
2578 "megaraid abort: scsi cmd:%ld, do now own\n",
2579 scp->serial_number));
2580
2581 // FIXME: Should there be a callback for this command?
2582 return SUCCESS;
2583 }
2584
2585 // We cannot actually abort a command owned by firmware, return
2586 // failure and wait for reset. In host reset handler, we will find out
2587 // if the HBA is still live
2588 return FAILED;
2589 }
2590
2591 /**
2592 * megaraid_reset_handler - device reset hadler for mailbox based driver
2593 * @scp : reference command
2594 *
2595 * Reset handler for the mailbox based controller. First try to find out if
2596 * the FW is still live, in which case the outstanding commands counter mut go
2597 * down to 0. If that happens, also issue the reservation reset command to
2598 * relinquish (possible) reservations on the logical drives connected to this
2599 * host.
2600 **/
2601 static int
2602 megaraid_reset_handler(struct scsi_cmnd *scp)
2603 {
2604 adapter_t *adapter;
2605 scb_t *scb;
2606 scb_t *tmp;
2607 mraid_device_t *raid_dev;
2608 unsigned long flags;
2609 uint8_t raw_mbox[sizeof(mbox_t)];
2610 int rval;
2611 int recovery_window;
2612 int recovering;
2613 int i;
2614 uioc_t *kioc;
2615
2616 adapter = SCP2ADAPTER(scp);
2617 raid_dev = ADAP2RAIDDEV(adapter);
2618
2619 // return failure if adapter is not responding
2620 if (raid_dev->hw_error) {
2621 con_log(CL_ANN, (KERN_NOTICE
2622 "megaraid: hw error, cannot reset\n"));
2623 return FAILED;
2624 }
2625
2626
2627 // Under exceptional conditions, FW can take up to 3 minutes to
2628 // complete command processing. Wait for additional 2 minutes for the
2629 // pending commands counter to go down to 0. If it doesn't, let the
2630 // controller be marked offline
2631 // Also, reset all the commands currently owned by the driver
2632 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2633 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2634 list_del_init(&scb->list); // from pending list
2635
2636 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2637 con_log(CL_ANN, (KERN_WARNING
2638 "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2639 scb->sno, scb->dev_channel, scb->dev_target));
2640
2641 scb->status = -1;
2642
2643 kioc = (uioc_t *)scb->gp;
2644 kioc->status = -EFAULT;
2645
2646 megaraid_mbox_mm_done(adapter, scb);
2647 } else {
2648 if (scb->scp == scp) { // Found command
2649 con_log(CL_ANN, (KERN_WARNING
2650 "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2651 scp->serial_number, scb->sno,
2652 scb->dev_channel, scb->dev_target));
2653 } else {
2654 con_log(CL_ANN, (KERN_WARNING
2655 "megaraid: IO packet with %d[%d:%d] being reset\n",
2656 scb->sno, scb->dev_channel, scb->dev_target));
2657 }
2658
2659 scb->scp->result = (DID_RESET << 16);
2660 scb->scp->scsi_done(scb->scp);
2661
2662 megaraid_dealloc_scb(adapter, scb);
2663 }
2664 }
2665 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2666
2667 if (adapter->outstanding_cmds) {
2668 con_log(CL_ANN, (KERN_NOTICE
2669 "megaraid: %d outstanding commands. Max wait %d sec\n",
2670 adapter->outstanding_cmds,
2671 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
2672 }
2673
2674 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2675
2676 recovering = adapter->outstanding_cmds;
2677
2678 for (i = 0; i < recovery_window; i++) {
2679
2680 megaraid_ack_sequence(adapter);
2681
2682 // print a message once every 5 seconds only
2683 if (!(i % 5)) {
2684 con_log(CL_ANN, (
2685 "megaraid mbox: Wait for %d commands to complete:%d\n",
2686 adapter->outstanding_cmds,
2687 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
2688 }
2689
2690 // bailout if no recovery happended in reset time
2691 if (adapter->outstanding_cmds == 0) {
2692 break;
2693 }
2694
2695 msleep(1000);
2696 }
2697
2698 spin_lock(&adapter->lock);
2699
2700 // If still outstanding commands, bail out
2701 if (adapter->outstanding_cmds) {
2702 con_log(CL_ANN, (KERN_WARNING
2703 "megaraid mbox: critical hardware error!\n"));
2704
2705 raid_dev->hw_error = 1;
2706
2707 rval = FAILED;
2708 goto out;
2709 }
2710 else {
2711 con_log(CL_ANN, (KERN_NOTICE
2712 "megaraid mbox: reset sequence completed successfully\n"));
2713 }
2714
2715
2716 // If the controller supports clustering, reset reservations
2717 if (!adapter->ha) {
2718 rval = SUCCESS;
2719 goto out;
2720 }
2721
2722 // clear reservations if any
2723 raw_mbox[0] = CLUSTER_CMD;
2724 raw_mbox[2] = RESET_RESERVATIONS;
2725
2726 rval = SUCCESS;
2727 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2728 con_log(CL_ANN,
2729 (KERN_INFO "megaraid: reservation reset\n"));
2730 }
2731 else {
2732 rval = FAILED;
2733 con_log(CL_ANN, (KERN_WARNING
2734 "megaraid: reservation reset failed\n"));
2735 }
2736
2737 out:
2738 spin_unlock_irq(&adapter->lock);
2739 return rval;
2740 }
2741
2742 /*
2743 * START: internal commands library
2744 *
2745 * This section of the driver has the common routine used by the driver and
2746 * also has all the FW routines
2747 */
2748
2749 /**
2750 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2751 * @adapter : controller's soft state
2752 * @raw_mbox : the mailbox
2753 *
2754 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2755 * controllers.
2756 */
2757 static int
2758 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2759 {
2760 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2761 mbox64_t *mbox64;
2762 mbox_t *mbox;
2763 uint8_t status;
2764 int i;
2765
2766
2767 mbox64 = raid_dev->mbox64;
2768 mbox = raid_dev->mbox;
2769
2770 /*
2771 * Wait until mailbox is free
2772 */
2773 if (megaraid_busywait_mbox(raid_dev) != 0)
2774 goto blocked_mailbox;
2775
2776 /*
2777 * Copy mailbox data into host structure
2778 */
2779 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2780 mbox->cmdid = 0xFE;
2781 mbox->busy = 1;
2782 mbox->poll = 0;
2783 mbox->ack = 0;
2784 mbox->numstatus = 0xFF;
2785 mbox->status = 0xFF;
2786
2787 wmb();
2788 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2789
2790 // wait for maximum 1 second for status to post. If the status is not
2791 // available within 1 second, assume FW is initializing and wait
2792 // for an extended amount of time
2793 if (mbox->numstatus == 0xFF) { // status not yet available
2794 udelay(25);
2795
2796 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2797 rmb();
2798 msleep(1);
2799 }
2800
2801
2802 if (i == 1000) {
2803 con_log(CL_ANN, (KERN_NOTICE
2804 "megaraid mailbox: wait for FW to boot "));
2805
2806 for (i = 0; (mbox->numstatus == 0xFF) &&
2807 (i < MBOX_RESET_WAIT); i++) {
2808 rmb();
2809 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2810 MBOX_RESET_WAIT - i));
2811 msleep(1000);
2812 }
2813
2814 if (i == MBOX_RESET_WAIT) {
2815
2816 con_log(CL_ANN, (
2817 "\nmegaraid mailbox: status not available\n"));
2818
2819 return -1;
2820 }
2821 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2822 }
2823 }
2824
2825 // wait for maximum 1 second for poll semaphore
2826 if (mbox->poll != 0x77) {
2827 udelay(25);
2828
2829 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2830 rmb();
2831 msleep(1);
2832 }
2833
2834 if (i == 1000) {
2835 con_log(CL_ANN, (KERN_WARNING
2836 "megaraid mailbox: could not get poll semaphore\n"));
2837 return -1;
2838 }
2839 }
2840
2841 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2842 wmb();
2843
2844 // wait for maximum 1 second for acknowledgement
2845 if (RDINDOOR(raid_dev) & 0x2) {
2846 udelay(25);
2847
2848 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2849 rmb();
2850 msleep(1);
2851 }
2852
2853 if (i == 1000) {
2854 con_log(CL_ANN, (KERN_WARNING
2855 "megaraid mailbox: could not acknowledge\n"));
2856 return -1;
2857 }
2858 }
2859 mbox->poll = 0;
2860 mbox->ack = 0x77;
2861
2862 status = mbox->status;
2863
2864 // invalidate the completed command id array. After command
2865 // completion, firmware would write the valid id.
2866 mbox->numstatus = 0xFF;
2867 mbox->status = 0xFF;
2868 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2869 mbox->completed[i] = 0xFF;
2870 }
2871
2872 return status;
2873
2874 blocked_mailbox:
2875
2876 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2877 return -1;
2878 }
2879
2880
2881 /**
2882 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2883 * @adapter : controller's soft state
2884 * @raw_mbox : the mailbox
2885 *
2886 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2887 * controllers. This is a faster version of the synchronous command and
2888 * therefore can be called in interrupt-context as well.
2889 */
2890 static int
2891 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2892 {
2893 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2894 mbox_t *mbox;
2895 long i;
2896
2897
2898 mbox = raid_dev->mbox;
2899
2900 // return immediately if the mailbox is busy
2901 if (mbox->busy) return -1;
2902
2903 // Copy mailbox data into host structure
2904 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2905 mbox->cmdid = 0xFE;
2906 mbox->busy = 1;
2907 mbox->poll = 0;
2908 mbox->ack = 0;
2909 mbox->numstatus = 0xFF;
2910 mbox->status = 0xFF;
2911
2912 wmb();
2913 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2914
2915 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
2916 if (mbox->numstatus != 0xFF) break;
2917 rmb();
2918 udelay(MBOX_SYNC_DELAY_200);
2919 }
2920
2921 if (i == MBOX_SYNC_WAIT_CNT) {
2922 // We may need to re-calibrate the counter
2923 con_log(CL_ANN, (KERN_CRIT
2924 "megaraid: fast sync command timed out\n"));
2925 }
2926
2927 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2928 wmb();
2929
2930 return mbox->status;
2931 }
2932
2933
2934 /**
2935 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
2936 * @raid_dev : RAID device (HBA) soft state
2937 *
2938 * Wait until the controller's mailbox is available to accept more commands.
2939 * Wait for at most 1 second.
2940 */
2941 static int
2942 megaraid_busywait_mbox(mraid_device_t *raid_dev)
2943 {
2944 mbox_t *mbox = raid_dev->mbox;
2945 int i = 0;
2946
2947 if (mbox->busy) {
2948 udelay(25);
2949 for (i = 0; mbox->busy && i < 1000; i++)
2950 msleep(1);
2951 }
2952
2953 if (i < 1000) return 0;
2954 else return -1;
2955 }
2956
2957
2958 /**
2959 * megaraid_mbox_product_info - some static information about the controller
2960 * @adapter : our soft state
2961 *
2962 * Issue commands to the controller to grab some parameters required by our
2963 * caller.
2964 */
2965 static int
2966 megaraid_mbox_product_info(adapter_t *adapter)
2967 {
2968 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2969 mbox_t *mbox;
2970 uint8_t raw_mbox[sizeof(mbox_t)];
2971 mraid_pinfo_t *pinfo;
2972 dma_addr_t pinfo_dma_h;
2973 mraid_inquiry3_t *mraid_inq3;
2974 int i;
2975
2976
2977 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2978 mbox = (mbox_t *)raw_mbox;
2979
2980 /*
2981 * Issue an ENQUIRY3 command to find out certain adapter parameters,
2982 * e.g., max channels, max commands etc.
2983 */
2984 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
2985 &pinfo_dma_h);
2986
2987 if (pinfo == NULL) {
2988 con_log(CL_ANN, (KERN_WARNING
2989 "megaraid: out of memory, %s %d\n", __func__,
2990 __LINE__));
2991
2992 return -1;
2993 }
2994 memset(pinfo, 0, sizeof(mraid_pinfo_t));
2995
2996 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
2997 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
2998
2999 raw_mbox[0] = FC_NEW_CONFIG;
3000 raw_mbox[2] = NC_SUBOP_ENQUIRY3;
3001 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
3002
3003 // Issue the command
3004 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3005
3006 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3007
3008 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3009 pinfo, pinfo_dma_h);
3010
3011 return -1;
3012 }
3013
3014 /*
3015 * Collect information about state of each physical drive
3016 * attached to the controller. We will expose all the disks
3017 * which are not part of RAID
3018 */
3019 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3020 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3021 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3022 }
3023
3024 /*
3025 * Get product info for information like number of channels,
3026 * maximum commands supported.
3027 */
3028 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3029 mbox->xferaddr = (uint32_t)pinfo_dma_h;
3030
3031 raw_mbox[0] = FC_NEW_CONFIG;
3032 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3033
3034 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3035
3036 con_log(CL_ANN, (KERN_WARNING
3037 "megaraid: product info failed\n"));
3038
3039 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3040 pinfo, pinfo_dma_h);
3041
3042 return -1;
3043 }
3044
3045 /*
3046 * Setup some parameters for host, as required by our caller
3047 */
3048 adapter->max_channel = pinfo->nchannels;
3049
3050 /*
3051 * we will export all the logical drives on a single channel.
3052 * Add 1 since inquires do not come for inititor ID
3053 */
3054 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1;
3055 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices
3056
3057 /*
3058 * These are the maximum outstanding commands for the scsi-layer
3059 */
3060 adapter->max_cmds = MBOX_MAX_SCSI_CMDS;
3061
3062 memset(adapter->fw_version, 0, VERSION_SIZE);
3063 memset(adapter->bios_version, 0, VERSION_SIZE);
3064
3065 memcpy(adapter->fw_version, pinfo->fw_version, 4);
3066 adapter->fw_version[4] = 0;
3067
3068 memcpy(adapter->bios_version, pinfo->bios_version, 4);
3069 adapter->bios_version[4] = 0;
3070
3071 con_log(CL_ANN, (KERN_NOTICE
3072 "megaraid: fw version:[%s] bios version:[%s]\n",
3073 adapter->fw_version, adapter->bios_version));
3074
3075 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3076 pinfo_dma_h);
3077
3078 return 0;
3079 }
3080
3081
3082
3083 /**
3084 * megaraid_mbox_extended_cdb - check for support for extended CDBs
3085 * @adapter : soft state for the controller
3086 *
3087 * This routine check whether the controller in question supports extended
3088 * ( > 10 bytes ) CDBs.
3089 */
3090 static int
3091 megaraid_mbox_extended_cdb(adapter_t *adapter)
3092 {
3093 mbox_t *mbox;
3094 uint8_t raw_mbox[sizeof(mbox_t)];
3095 int rval;
3096
3097 mbox = (mbox_t *)raw_mbox;
3098
3099 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3100 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3101
3102 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3103
3104 raw_mbox[0] = MAIN_MISC_OPCODE;
3105 raw_mbox[2] = SUPPORT_EXT_CDB;
3106
3107 /*
3108 * Issue the command
3109 */
3110 rval = 0;
3111 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3112 rval = -1;
3113 }
3114
3115 return rval;
3116 }
3117
3118
3119 /**
3120 * megaraid_mbox_support_ha - Do we support clustering
3121 * @adapter : soft state for the controller
3122 * @init_id : ID of the initiator
3123 *
3124 * Determine if the firmware supports clustering and the ID of the initiator.
3125 */
3126 static int
3127 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3128 {
3129 mbox_t *mbox;
3130 uint8_t raw_mbox[sizeof(mbox_t)];
3131 int rval;
3132
3133
3134 mbox = (mbox_t *)raw_mbox;
3135
3136 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3137
3138 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3139
3140 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3141
3142 raw_mbox[0] = GET_TARGET_ID;
3143
3144 // Issue the command
3145 *init_id = 7;
3146 rval = -1;
3147 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3148
3149 *init_id = *(uint8_t *)adapter->ibuf;
3150
3151 con_log(CL_ANN, (KERN_INFO
3152 "megaraid: cluster firmware, initiator ID: %d\n",
3153 *init_id));
3154
3155 rval = 0;
3156 }
3157
3158 return rval;
3159 }
3160
3161
3162 /**
3163 * megaraid_mbox_support_random_del - Do we support random deletion
3164 * @adapter : soft state for the controller
3165 *
3166 * Determine if the firmware supports random deletion.
3167 * Return: 1 is operation supported, 0 otherwise
3168 */
3169 static int
3170 megaraid_mbox_support_random_del(adapter_t *adapter)
3171 {
3172 mbox_t *mbox;
3173 uint8_t raw_mbox[sizeof(mbox_t)];
3174 int rval;
3175
3176 /*
3177 * Newer firmware on Dell CERC expect a different
3178 * random deletion handling, so disable it.
3179 */
3180 if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI &&
3181 adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 &&
3182 adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
3183 adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH &&
3184 (adapter->fw_version[0] > '6' ||
3185 (adapter->fw_version[0] == '6' &&
3186 adapter->fw_version[2] > '6') ||
3187 (adapter->fw_version[0] == '6'
3188 && adapter->fw_version[2] == '6'
3189 && adapter->fw_version[3] > '1'))) {
3190 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n"));
3191 return 0;
3192 }
3193
3194 mbox = (mbox_t *)raw_mbox;
3195
3196 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3197
3198 raw_mbox[0] = FC_DEL_LOGDRV;
3199 raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3200
3201 // Issue the command
3202 rval = 0;
3203 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3204
3205 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3206
3207 rval = 1;
3208 }
3209
3210 return rval;
3211 }
3212
3213
3214 /**
3215 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3216 * @adapter : soft state for the controller
3217 *
3218 * Find out the maximum number of scatter-gather elements supported by the
3219 * firmware.
3220 */
3221 static int
3222 megaraid_mbox_get_max_sg(adapter_t *adapter)
3223 {
3224 mbox_t *mbox;
3225 uint8_t raw_mbox[sizeof(mbox_t)];
3226 int nsg;
3227
3228
3229 mbox = (mbox_t *)raw_mbox;
3230
3231 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3232
3233 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3234
3235 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3236
3237 raw_mbox[0] = MAIN_MISC_OPCODE;
3238 raw_mbox[2] = GET_MAX_SG_SUPPORT;
3239
3240 // Issue the command
3241 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3242 nsg = *(uint8_t *)adapter->ibuf;
3243 }
3244 else {
3245 nsg = MBOX_DEFAULT_SG_SIZE;
3246 }
3247
3248 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3249
3250 return nsg;
3251 }
3252
3253
3254 /**
3255 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3256 * @adapter : soft state for the controller
3257 *
3258 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3259 * can be exported as regular SCSI channels.
3260 */
3261 static void
3262 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3263 {
3264 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3265 mbox_t *mbox;
3266 uint8_t raw_mbox[sizeof(mbox_t)];
3267
3268
3269 mbox = (mbox_t *)raw_mbox;
3270
3271 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3272
3273 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3274
3275 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3276
3277 raw_mbox[0] = CHNL_CLASS;
3278 raw_mbox[2] = GET_CHNL_CLASS;
3279
3280 // Issue the command. If the command fails, all channels are RAID
3281 // channels
3282 raid_dev->channel_class = 0xFF;
3283 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3284 raid_dev->channel_class = *(uint8_t *)adapter->ibuf;
3285 }
3286
3287 return;
3288 }
3289
3290
3291 /**
3292 * megaraid_mbox_flush_cache - flush adapter and disks cache
3293 * @adapter : soft state for the controller
3294 *
3295 * Flush adapter cache followed by disks cache.
3296 */
3297 static void
3298 megaraid_mbox_flush_cache(adapter_t *adapter)
3299 {
3300 mbox_t *mbox;
3301 uint8_t raw_mbox[sizeof(mbox_t)];
3302
3303
3304 mbox = (mbox_t *)raw_mbox;
3305
3306 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3307
3308 raw_mbox[0] = FLUSH_ADAPTER;
3309
3310 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3311 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3312 }
3313
3314 raw_mbox[0] = FLUSH_SYSTEM;
3315
3316 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3317 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3318 }
3319
3320 return;
3321 }
3322
3323
3324 /**
3325 * megaraid_mbox_fire_sync_cmd - fire the sync cmd
3326 * @adapter : soft state for the controller
3327 *
3328 * Clears the pending cmds in FW and reinits its RAID structs.
3329 */
3330 static int
3331 megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3332 {
3333 mbox_t *mbox;
3334 uint8_t raw_mbox[sizeof(mbox_t)];
3335 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3336 mbox64_t *mbox64;
3337 int status = 0;
3338 int i;
3339 uint32_t dword;
3340
3341 mbox = (mbox_t *)raw_mbox;
3342
3343 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3344
3345 raw_mbox[0] = 0xFF;
3346
3347 mbox64 = raid_dev->mbox64;
3348 mbox = raid_dev->mbox;
3349
3350 /* Wait until mailbox is free */
3351 if (megaraid_busywait_mbox(raid_dev) != 0) {
3352 status = 1;
3353 goto blocked_mailbox;
3354 }
3355
3356 /* Copy mailbox data into host structure */
3357 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3358 mbox->cmdid = 0xFE;
3359 mbox->busy = 1;
3360 mbox->poll = 0;
3361 mbox->ack = 0;
3362 mbox->numstatus = 0;
3363 mbox->status = 0;
3364
3365 wmb();
3366 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3367
3368 /* Wait for maximum 1 min for status to post.
3369 * If the Firmware SUPPORTS the ABOVE COMMAND,
3370 * mbox->cmd will be set to 0
3371 * else
3372 * the firmware will reject the command with
3373 * mbox->numstatus set to 1
3374 */
3375
3376 i = 0;
3377 status = 0;
3378 while (!mbox->numstatus && mbox->cmd == 0xFF) {
3379 rmb();
3380 msleep(1);
3381 i++;
3382 if (i > 1000 * 60) {
3383 status = 1;
3384 break;
3385 }
3386 }
3387 if (mbox->numstatus == 1)
3388 status = 1; /*cmd not supported*/
3389
3390 /* Check for interrupt line */
3391 dword = RDOUTDOOR(raid_dev);
3392 WROUTDOOR(raid_dev, dword);
3393 WRINDOOR(raid_dev,2);
3394
3395 return status;
3396
3397 blocked_mailbox:
3398 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3399 return status;
3400 }
3401
3402 /**
3403 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3404 * @adapter : controller's soft state
3405 * @scb : SCB to be displayed
3406 * @level : debug level for console print
3407 *
3408 * Diplay information about the given SCB iff the current debug level is
3409 * verbose.
3410 */
3411 static void
3412 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3413 {
3414 mbox_ccb_t *ccb;
3415 struct scsi_cmnd *scp;
3416 mbox_t *mbox;
3417 int level;
3418 int i;
3419
3420
3421 ccb = (mbox_ccb_t *)scb->ccb;
3422 scp = scb->scp;
3423 mbox = ccb->mbox;
3424
3425 level = CL_DLEVEL3;
3426
3427 con_log(level, (KERN_NOTICE
3428 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3429 mbox->cmd, scb->sno));
3430
3431 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3432 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3433 mbox->numsge));
3434
3435 if (!scp) return;
3436
3437 con_log(level, (KERN_NOTICE "scsi cmnd: "));
3438
3439 for (i = 0; i < scp->cmd_len; i++) {
3440 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3441 }
3442
3443 con_log(level, ("\n"));
3444
3445 return;
3446 }
3447
3448
3449 /**
3450 * megaraid_mbox_setup_device_map - manage device ids
3451 * @adapter : Driver's soft state
3452 *
3453 * Manange the device ids to have an appropraite mapping between the kernel
3454 * scsi addresses and megaraid scsi and logical drive addresses. We export
3455 * scsi devices on their actual addresses, whereas the logical drives are
3456 * exported on a virtual scsi channel.
3457 */
3458 static void
3459 megaraid_mbox_setup_device_map(adapter_t *adapter)
3460 {
3461 uint8_t c;
3462 uint8_t t;
3463
3464 /*
3465 * First fill the values on the logical drive channel
3466 */
3467 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3468 adapter->device_ids[adapter->max_channel][t] =
3469 (t < adapter->init_id) ? t : t - 1;
3470
3471 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3472
3473 /*
3474 * Fill the values on the physical devices channels
3475 */
3476 for (c = 0; c < adapter->max_channel; c++)
3477 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3478 adapter->device_ids[c][t] = (c << 8) | t;
3479 }
3480
3481
3482 /*
3483 * END: internal commands library
3484 */
3485
3486 /*
3487 * START: Interface for the common management module
3488 *
3489 * This is the module, which interfaces with the common management module to
3490 * provide support for ioctl and sysfs
3491 */
3492
3493 /**
3494 * megaraid_cmm_register - register with the management module
3495 * @adapter : HBA soft state
3496 *
3497 * Register with the management module, which allows applications to issue
3498 * ioctl calls to the drivers. This interface is used by the management module
3499 * to setup sysfs support as well.
3500 */
3501 static int
3502 megaraid_cmm_register(adapter_t *adapter)
3503 {
3504 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3505 mraid_mmadp_t adp;
3506 scb_t *scb;
3507 mbox_ccb_t *ccb;
3508 int rval;
3509 int i;
3510
3511 // Allocate memory for the base list of scb for management module.
3512 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL);
3513
3514 if (adapter->uscb_list == NULL) {
3515 con_log(CL_ANN, (KERN_WARNING
3516 "megaraid: out of memory, %s %d\n", __func__,
3517 __LINE__));
3518 return -1;
3519 }
3520
3521
3522 // Initialize the synchronization parameters for resources for
3523 // commands for management module
3524 INIT_LIST_HEAD(&adapter->uscb_pool);
3525
3526 spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3527
3528
3529
3530 // link all the packets. Note, CCB for commands, coming from the
3531 // commom management module, mailbox physical address are already
3532 // setup by it. We just need placeholder for that in our local command
3533 // control blocks
3534 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3535
3536 scb = adapter->uscb_list + i;
3537 ccb = raid_dev->uccb_list + i;
3538
3539 scb->ccb = (caddr_t)ccb;
3540 ccb->mbox64 = raid_dev->umbox64 + i;
3541 ccb->mbox = &ccb->mbox64->mbox32;
3542 ccb->raw_mbox = (uint8_t *)ccb->mbox;
3543
3544 scb->gp = 0;
3545
3546 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3547 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3548 scb->sno = i + MBOX_MAX_SCSI_CMDS;
3549
3550 scb->scp = NULL;
3551 scb->state = SCB_FREE;
3552 scb->dma_direction = PCI_DMA_NONE;
3553 scb->dma_type = MRAID_DMA_NONE;
3554 scb->dev_channel = -1;
3555 scb->dev_target = -1;
3556
3557 // put scb in the free pool
3558 list_add_tail(&scb->list, &adapter->uscb_pool);
3559 }
3560
3561 adp.unique_id = adapter->unique_id;
3562 adp.drvr_type = DRVRTYPE_MBOX;
3563 adp.drvr_data = (unsigned long)adapter;
3564 adp.pdev = adapter->pdev;
3565 adp.issue_uioc = megaraid_mbox_mm_handler;
3566 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
3567 adp.max_kioc = MBOX_MAX_USER_CMDS;
3568
3569 if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3570
3571 con_log(CL_ANN, (KERN_WARNING
3572 "megaraid mbox: did not register with CMM\n"));
3573
3574 kfree(adapter->uscb_list);
3575 }
3576
3577 return rval;
3578 }
3579
3580
3581 /**
3582 * megaraid_cmm_unregister - un-register with the management module
3583 * @adapter : HBA soft state
3584 *
3585 * Un-register with the management module.
3586 * FIXME: mgmt module must return failure for unregister if it has pending
3587 * commands in LLD.
3588 */
3589 static int
3590 megaraid_cmm_unregister(adapter_t *adapter)
3591 {
3592 kfree(adapter->uscb_list);
3593 mraid_mm_unregister_adp(adapter->unique_id);
3594 return 0;
3595 }
3596
3597
3598 /**
3599 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3600 * @drvr_data : LLD specific data
3601 * @kioc : CMM interface packet
3602 * @action : command action
3603 *
3604 * This routine is invoked whenever the Common Management Module (CMM) has a
3605 * command for us. The 'action' parameter specifies if this is a new command
3606 * or otherwise.
3607 */
3608 static int
3609 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3610 {
3611 adapter_t *adapter;
3612
3613 if (action != IOCTL_ISSUE) {
3614 con_log(CL_ANN, (KERN_WARNING
3615 "megaraid: unsupported management action:%#2x\n",
3616 action));
3617 return (-ENOTSUPP);
3618 }
3619
3620 adapter = (adapter_t *)drvr_data;
3621
3622 // make sure this adapter is not being detached right now.
3623 if (atomic_read(&adapter->being_detached)) {
3624 con_log(CL_ANN, (KERN_WARNING
3625 "megaraid: reject management request, detaching\n"));
3626 return (-ENODEV);
3627 }
3628
3629 switch (kioc->opcode) {
3630
3631 case GET_ADAP_INFO:
3632
3633 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *)
3634 (unsigned long)kioc->buf_vaddr);
3635
3636 kioc->done(kioc);
3637
3638 return kioc->status;
3639
3640 case MBOX_CMD:
3641
3642 return megaraid_mbox_mm_command(adapter, kioc);
3643
3644 default:
3645 kioc->status = (-EINVAL);
3646 kioc->done(kioc);
3647 return (-EINVAL);
3648 }
3649
3650 return 0; // not reached
3651 }
3652
3653 /**
3654 * megaraid_mbox_mm_command - issues commands routed through CMM
3655 * @adapter : HBA soft state
3656 * @kioc : management command packet
3657 *
3658 * Issues commands, which are routed through the management module.
3659 */
3660 static int
3661 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3662 {
3663 struct list_head *head = &adapter->uscb_pool;
3664 mbox64_t *mbox64;
3665 uint8_t *raw_mbox;
3666 scb_t *scb;
3667 mbox_ccb_t *ccb;
3668 unsigned long flags;
3669
3670 // detach one scb from free pool
3671 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3672
3673 if (list_empty(head)) { // should never happen because of CMM
3674
3675 con_log(CL_ANN, (KERN_WARNING
3676 "megaraid mbox: bug in cmm handler, lost resources\n"));
3677
3678 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3679
3680 return (-EINVAL);
3681 }
3682
3683 scb = list_entry(head->next, scb_t, list);
3684 list_del_init(&scb->list);
3685
3686 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3687
3688 scb->state = SCB_ACTIVE;
3689 scb->dma_type = MRAID_DMA_NONE;
3690 scb->dma_direction = PCI_DMA_NONE;
3691
3692 ccb = (mbox_ccb_t *)scb->ccb;
3693 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3694 raw_mbox = (uint8_t *)&mbox64->mbox32;
3695
3696 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3697
3698 scb->gp = (unsigned long)kioc;
3699
3700 /*
3701 * If it is a logdrv random delete operation, we have to wait till
3702 * there are no outstanding cmds at the fw and then issue it directly
3703 */
3704 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3705
3706 if (wait_till_fw_empty(adapter)) {
3707 con_log(CL_ANN, (KERN_NOTICE
3708 "megaraid mbox: LD delete, timed out\n"));
3709
3710 kioc->status = -ETIME;
3711
3712 scb->status = -1;
3713
3714 megaraid_mbox_mm_done(adapter, scb);
3715
3716 return (-ETIME);
3717 }
3718
3719 INIT_LIST_HEAD(&scb->list);
3720
3721 scb->state = SCB_ISSUED;
3722 if (mbox_post_cmd(adapter, scb) != 0) {
3723
3724 con_log(CL_ANN, (KERN_NOTICE
3725 "megaraid mbox: LD delete, mailbox busy\n"));
3726
3727 kioc->status = -EBUSY;
3728
3729 scb->status = -1;
3730
3731 megaraid_mbox_mm_done(adapter, scb);
3732
3733 return (-EBUSY);
3734 }
3735
3736 return 0;
3737 }
3738
3739 // put the command on the pending list and execute
3740 megaraid_mbox_runpendq(adapter, scb);
3741
3742 return 0;
3743 }
3744
3745
3746 static int
3747 wait_till_fw_empty(adapter_t *adapter)
3748 {
3749 unsigned long flags = 0;
3750 int i;
3751
3752
3753 /*
3754 * Set the quiescent flag to stop issuing cmds to FW.
3755 */
3756 spin_lock_irqsave(&adapter->lock, flags);
3757 adapter->quiescent++;
3758 spin_unlock_irqrestore(&adapter->lock, flags);
3759
3760 /*
3761 * Wait till there are no more cmds outstanding at FW. Try for at most
3762 * 60 seconds
3763 */
3764 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3765 con_log(CL_DLEVEL1, (KERN_INFO
3766 "megaraid: FW has %d pending commands\n",
3767 adapter->outstanding_cmds));
3768
3769 msleep(1000);
3770 }
3771
3772 return adapter->outstanding_cmds;
3773 }
3774
3775
3776 /**
3777 * megaraid_mbox_mm_done - callback for CMM commands
3778 * @adapter : HBA soft state
3779 * @scb : completed command
3780 *
3781 * Callback routine for internal commands originated from the management
3782 * module.
3783 */
3784 static void
3785 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3786 {
3787 uioc_t *kioc;
3788 mbox64_t *mbox64;
3789 uint8_t *raw_mbox;
3790 unsigned long flags;
3791
3792 kioc = (uioc_t *)scb->gp;
3793 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3794 mbox64->mbox32.status = scb->status;
3795 raw_mbox = (uint8_t *)&mbox64->mbox32;
3796
3797
3798 // put scb in the free pool
3799 scb->state = SCB_FREE;
3800 scb->scp = NULL;
3801
3802 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3803
3804 list_add(&scb->list, &adapter->uscb_pool);
3805
3806 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3807
3808 // if a delete logical drive operation succeeded, restart the
3809 // controller
3810 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3811
3812 adapter->quiescent--;
3813
3814 megaraid_mbox_runpendq(adapter, NULL);
3815 }
3816
3817 kioc->done(kioc);
3818
3819 return;
3820 }
3821
3822
3823 /**
3824 * gather_hbainfo - HBA characteristics for the applications
3825 * @adapter : HBA soft state
3826 * @hinfo : pointer to the caller's host info strucuture
3827 */
3828 static int
3829 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3830 {
3831 uint8_t dmajor;
3832
3833 dmajor = megaraid_mbox_version[0];
3834
3835 hinfo->pci_vendor_id = adapter->pdev->vendor;
3836 hinfo->pci_device_id = adapter->pdev->device;
3837 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3838 hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3839
3840 hinfo->pci_bus = adapter->pdev->bus->number;
3841 hinfo->pci_dev_fn = adapter->pdev->devfn;
3842 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn);
3843 hinfo->irq = adapter->host->irq;
3844 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport;
3845
3846 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3847 hinfo->host_no = adapter->host->host_no;
3848
3849 return 0;
3850 }
3851
3852 /*
3853 * END: Interface for the common management module
3854 */
3855
3856
3857
3858 /**
3859 * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3860 * @adapter : controller's soft state
3861 *
3862 * Allocate packets required to issue FW calls whenever the sysfs attributes
3863 * are read. These attributes would require up-to-date information from the
3864 * FW. Also set up resources for mutual exclusion to share these resources and
3865 * the wait queue.
3866 *
3867 * Return 0 on success.
3868 * Return -ERROR_CODE on failure.
3869 */
3870 static int
3871 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3872 {
3873 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3874 int rval = 0;
3875
3876 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3877
3878 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3879
3880 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3881 PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3882
3883 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3884 !raid_dev->sysfs_buffer) {
3885
3886 con_log(CL_ANN, (KERN_WARNING
3887 "megaraid: out of memory, %s %d\n", __func__,
3888 __LINE__));
3889
3890 rval = -ENOMEM;
3891
3892 megaraid_sysfs_free_resources(adapter);
3893 }
3894
3895 mutex_init(&raid_dev->sysfs_mtx);
3896
3897 init_waitqueue_head(&raid_dev->sysfs_wait_q);
3898
3899 return rval;
3900 }
3901
3902
3903 /**
3904 * megaraid_sysfs_free_resources - free sysfs related resources
3905 * @adapter : controller's soft state
3906 *
3907 * Free packets allocated for sysfs FW commands
3908 */
3909 static void
3910 megaraid_sysfs_free_resources(adapter_t *adapter)
3911 {
3912 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3913
3914 kfree(raid_dev->sysfs_uioc);
3915 kfree(raid_dev->sysfs_mbox64);
3916
3917 if (raid_dev->sysfs_buffer) {
3918 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3919 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3920 }
3921 }
3922
3923
3924 /**
3925 * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3926 * @uioc : completed packet
3927 *
3928 * Callback routine called in the ISR/tasklet context for get ldmap call
3929 */
3930 static void
3931 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3932 {
3933 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3934 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3935
3936 uioc->status = 0;
3937
3938 wake_up(&raid_dev->sysfs_wait_q);
3939 }
3940
3941
3942 /**
3943 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3944 * @data : timed out packet
3945 *
3946 * Timeout routine to recover and return to application, in case the adapter
3947 * has stopped responding. A timeout of 60 seconds for this command seems like
3948 * a good value.
3949 */
3950 static void
3951 megaraid_sysfs_get_ldmap_timeout(unsigned long data)
3952 {
3953 uioc_t *uioc = (uioc_t *)data;
3954 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3955 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3956
3957 uioc->status = -ETIME;
3958
3959 wake_up(&raid_dev->sysfs_wait_q);
3960 }
3961
3962
3963 /**
3964 * megaraid_sysfs_get_ldmap - get update logical drive map
3965 * @adapter : controller's soft state
3966 *
3967 * This routine will be called whenever user reads the logical drive
3968 * attributes, go get the current logical drive mapping table from the
3969 * firmware. We use the management API's to issue commands to the controller.
3970 *
3971 * NOTE: The commands issuance functionality is not generalized and
3972 * implemented in context of "get ld map" command only. If required, the
3973 * command issuance logical can be trivially pulled out and implemented as a
3974 * standalone libary. For now, this should suffice since there is no other
3975 * user of this interface.
3976 *
3977 * Return 0 on success.
3978 * Return -1 on failure.
3979 */
3980 static int
3981 megaraid_sysfs_get_ldmap(adapter_t *adapter)
3982 {
3983 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3984 uioc_t *uioc;
3985 mbox64_t *mbox64;
3986 mbox_t *mbox;
3987 char *raw_mbox;
3988 struct timer_list sysfs_timer;
3989 struct timer_list *timerp;
3990 caddr_t ldmap;
3991 int rval = 0;
3992
3993 /*
3994 * Allow only one read at a time to go through the sysfs attributes
3995 */
3996 mutex_lock(&raid_dev->sysfs_mtx);
3997
3998 uioc = raid_dev->sysfs_uioc;
3999 mbox64 = raid_dev->sysfs_mbox64;
4000 ldmap = raid_dev->sysfs_buffer;
4001
4002 memset(uioc, 0, sizeof(uioc_t));
4003 memset(mbox64, 0, sizeof(mbox64_t));
4004 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
4005
4006 mbox = &mbox64->mbox32;
4007 raw_mbox = (char *)mbox;
4008 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64;
4009 uioc->buf_vaddr = (caddr_t)adapter;
4010 uioc->status = -ENODATA;
4011 uioc->done = megaraid_sysfs_get_ldmap_done;
4012
4013 /*
4014 * Prepare the mailbox packet to get the current logical drive mapping
4015 * table
4016 */
4017 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
4018
4019 raw_mbox[0] = FC_DEL_LOGDRV;
4020 raw_mbox[2] = OP_GET_LDID_MAP;
4021
4022 /*
4023 * Setup a timer to recover from a non-responding controller
4024 */
4025 timerp = &sysfs_timer;
4026 init_timer(timerp);
4027
4028 timerp->function = megaraid_sysfs_get_ldmap_timeout;
4029 timerp->data = (unsigned long)uioc;
4030 timerp->expires = jiffies + 60 * HZ;
4031
4032 add_timer(timerp);
4033
4034 /*
4035 * Send the command to the firmware
4036 */
4037 rval = megaraid_mbox_mm_command(adapter, uioc);
4038
4039 if (rval == 0) { // command successfully issued
4040 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4041
4042 /*
4043 * Check if the command timed out
4044 */
4045 if (uioc->status == -ETIME) {
4046 con_log(CL_ANN, (KERN_NOTICE
4047 "megaraid: sysfs get ld map timed out\n"));
4048
4049 rval = -ETIME;
4050 }
4051 else {
4052 rval = mbox->status;
4053 }
4054
4055 if (rval == 0) {
4056 memcpy(raid_dev->curr_ldmap, ldmap,
4057 sizeof(raid_dev->curr_ldmap));
4058 }
4059 else {
4060 con_log(CL_ANN, (KERN_NOTICE
4061 "megaraid: get ld map failed with %x\n", rval));
4062 }
4063 }
4064 else {
4065 con_log(CL_ANN, (KERN_NOTICE
4066 "megaraid: could not issue ldmap command:%x\n", rval));
4067 }
4068
4069
4070 del_timer_sync(timerp);
4071
4072 mutex_unlock(&raid_dev->sysfs_mtx);
4073
4074 return rval;
4075 }
4076
4077
4078 /**
4079 * megaraid_sysfs_show_app_hndl - display application handle for this adapter
4080 * @cdev : class device object representation for the host
4081 * @buf : buffer to send data to
4082 *
4083 * Display the handle used by the applications while executing management
4084 * tasks on the adapter. We invoke a management module API to get the adapter
4085 * handle, since we do not interface with applications directly.
4086 */
4087 static ssize_t
4088 megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr,
4089 char *buf)
4090 {
4091 struct Scsi_Host *shost = class_to_shost(dev);
4092 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4093 uint32_t app_hndl;
4094
4095 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4096
4097 return snprintf(buf, 8, "%u\n", app_hndl);
4098 }
4099
4100
4101 /**
4102 * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4103 * @dev : device object representation for the scsi device
4104 * @attr : device attribute to show
4105 * @buf : buffer to send data to
4106 *
4107 * Display the logical drive number for the device in question, if it a valid
4108 * logical drive. For physical devices, "-1" is returned.
4109 *
4110 * The logical drive number is displayed in following format:
4111 *
4112 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4113 *
4114 * <int> <int> <int> <int>
4115 */
4116 static ssize_t
4117 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
4118 {
4119 struct scsi_device *sdev = to_scsi_device(dev);
4120 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4121 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4122 int scsi_id = -1;
4123 int logical_drv = -1;
4124 int ldid_map = -1;
4125 uint32_t app_hndl = 0;
4126 int mapped_sdev_id;
4127 int rval;
4128 int i;
4129
4130 if (raid_dev->random_del_supported &&
4131 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4132
4133 rval = megaraid_sysfs_get_ldmap(adapter);
4134 if (rval == 0) {
4135
4136 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4137
4138 mapped_sdev_id = sdev->id;
4139
4140 if (sdev->id > adapter->init_id) {
4141 mapped_sdev_id -= 1;
4142 }
4143
4144 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4145
4146 scsi_id = sdev->id;
4147
4148 logical_drv = i;
4149
4150 ldid_map = raid_dev->curr_ldmap[i];
4151
4152 app_hndl = mraid_mm_adapter_app_handle(
4153 adapter->unique_id);
4154
4155 break;
4156 }
4157 }
4158 }
4159 else {
4160 con_log(CL_ANN, (KERN_NOTICE
4161 "megaraid: sysfs get ld map failed: %x\n",
4162 rval));
4163 }
4164 }
4165
4166 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4167 ldid_map, app_hndl);
4168 }
4169
4170
4171 /*
4172 * END: Mailbox Low Level Driver
4173 */
4174 module_init(megaraid_init);
4175 module_exit(megaraid_exit);
4176
4177 /* vim: set ts=8 sw=8 tw=78 ai si: */
linux 2.6 git repository for openrd