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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / scsi / megaraid / megaraid_mbox.c
blobe2237a97cb9d314b485869cc37da7e3de8062531
1 /*
2 *
3 * Linux MegaRAID device driver
4 *
5 * Copyright (c) 2003-2004 LSI Logic Corporation.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 *
12 * FILE : megaraid_mbox.c
13 * Version : v2.20.5.1 (Nov 16 2006)
14 *
15 * Authors:
16 * Atul Mukker <Atul.Mukker@lsi.com>
17 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com>
18 * Manoj Jose <Manoj.Jose@lsi.com>
19 * Seokmann Ju
20 *
21 * List of supported controllers
22 *
23 * OEM Product Name VID DID SSVID SSID
24 * --- ------------ --- --- ---- ----
25 * Dell PERC3/QC 101E 1960 1028 0471
26 * Dell PERC3/DC 101E 1960 1028 0493
27 * Dell PERC3/SC 101E 1960 1028 0475
28 * Dell PERC3/Di 1028 1960 1028 0123
29 * Dell PERC4/SC 1000 1960 1028 0520
30 * Dell PERC4/DC 1000 1960 1028 0518
31 * Dell PERC4/QC 1000 0407 1028 0531
32 * Dell PERC4/Di 1028 000F 1028 014A
33 * Dell PERC 4e/Si 1028 0013 1028 016c
34 * Dell PERC 4e/Di 1028 0013 1028 016d
35 * Dell PERC 4e/Di 1028 0013 1028 016e
36 * Dell PERC 4e/Di 1028 0013 1028 016f
37 * Dell PERC 4e/Di 1028 0013 1028 0170
38 * Dell PERC 4e/DC 1000 0408 1028 0002
39 * Dell PERC 4e/SC 1000 0408 1028 0001
40 *
41 *
42 * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520
43 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520
44 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518
45 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530
46 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532
47 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531
48 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001
49 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002
50 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523
51 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523
52 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004
53 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008
54 *
55 * INTEL RAID Controller SRCU42X 1000 0407 8086 0532
56 * INTEL RAID Controller SRCS16 1000 1960 8086 0523
57 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002
58 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530
59 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008
60 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431
61 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499
62 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520
63 *
64 * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065
65 *
66 * ACER MegaRAID ROMB-2E 1000 0408 1025 004D
67 *
68 * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287
69 *
70 * For history of changes, see Documentation/scsi/ChangeLog.megaraid
71 */
72
73 #include <linux/slab.h>
74 #include <linux/module.h>
75 #include "megaraid_mbox.h"
76
77 static int megaraid_init(void);
78 static void megaraid_exit(void);
79
80 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
81 static void megaraid_detach_one(struct pci_dev *);
82 static void megaraid_mbox_shutdown(struct pci_dev *);
83
84 static int megaraid_io_attach(adapter_t *);
85 static void megaraid_io_detach(adapter_t *);
86
87 static int megaraid_init_mbox(adapter_t *);
88 static void megaraid_fini_mbox(adapter_t *);
89
90 static int megaraid_alloc_cmd_packets(adapter_t *);
91 static void megaraid_free_cmd_packets(adapter_t *);
92
93 static int megaraid_mbox_setup_dma_pools(adapter_t *);
94 static void megaraid_mbox_teardown_dma_pools(adapter_t *);
95
96 static int megaraid_sysfs_alloc_resources(adapter_t *);
97 static void megaraid_sysfs_free_resources(adapter_t *);
98
99 static int megaraid_abort_handler(struct scsi_cmnd *);
100 static int megaraid_reset_handler(struct scsi_cmnd *);
101
102 static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
103 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
104 static int megaraid_busywait_mbox(mraid_device_t *);
105 static int megaraid_mbox_product_info(adapter_t *);
106 static int megaraid_mbox_extended_cdb(adapter_t *);
107 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
108 static int megaraid_mbox_support_random_del(adapter_t *);
109 static int megaraid_mbox_get_max_sg(adapter_t *);
110 static void megaraid_mbox_enum_raid_scsi(adapter_t *);
111 static void megaraid_mbox_flush_cache(adapter_t *);
112 static int megaraid_mbox_fire_sync_cmd(adapter_t *);
113
114 static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
115 static void megaraid_mbox_setup_device_map(adapter_t *);
116
117 static int megaraid_queue_command(struct Scsi_Host *, struct scsi_cmnd *);
118 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
119 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
120 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
121 struct scsi_cmnd *);
122 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
123 struct scsi_cmnd *);
124
125 static irqreturn_t megaraid_isr(int, void *);
126
127 static void megaraid_mbox_dpc(unsigned long);
128
129 static ssize_t megaraid_sysfs_show_app_hndl(struct device *, struct device_attribute *attr, char *);
130 static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *);
131
132 static int megaraid_cmm_register(adapter_t *);
133 static int megaraid_cmm_unregister(adapter_t *);
134 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
135 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
136 static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
137 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
138 static int wait_till_fw_empty(adapter_t *);
139
140
141
142 MODULE_AUTHOR("megaraidlinux@lsi.com");
143 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
144 MODULE_LICENSE("GPL");
145 MODULE_VERSION(MEGARAID_VERSION);
146
147 /*
148 * ### modules parameters for driver ###
149 */
150
151 /*
152 * Set to enable driver to expose unconfigured disk to kernel
153 */
154 static int megaraid_expose_unconf_disks = 0;
155 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
156 MODULE_PARM_DESC(unconf_disks,
157 "Set to expose unconfigured disks to kernel (default=0)");
158
159 /*
160 * driver wait time if the adapter's mailbox is busy
161 */
162 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
163 module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
164 MODULE_PARM_DESC(busy_wait,
165 "Max wait for mailbox in microseconds if busy (default=10)");
166
167 /*
168 * number of sectors per IO command
169 */
170 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
171 module_param_named(max_sectors, megaraid_max_sectors, int, 0);
172 MODULE_PARM_DESC(max_sectors,
173 "Maximum number of sectors per IO command (default=128)");
174
175 /*
176 * number of commands per logical unit
177 */
178 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
179 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
180 MODULE_PARM_DESC(cmd_per_lun,
181 "Maximum number of commands per logical unit (default=64)");
182
183
184 /*
185 * Fast driver load option, skip scanning for physical devices during load.
186 * This would result in non-disk devices being skipped during driver load
187 * time. These can be later added though, using /proc/scsi/scsi
188 */
189 static unsigned int megaraid_fast_load = 0;
190 module_param_named(fast_load, megaraid_fast_load, int, 0);
191 MODULE_PARM_DESC(fast_load,
192 "Faster loading of the driver, skips physical devices! (default=0)");
193
194
195 /*
196 * mraid_debug level - threshold for amount of information to be displayed by
197 * the driver. This level can be changed through modules parameters, ioctl or
198 * sysfs/proc interface. By default, print the announcement messages only.
199 */
200 int mraid_debug_level = CL_ANN;
201 module_param_named(debug_level, mraid_debug_level, int, 0);
202 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
203
204 /*
205 * ### global data ###
206 */
207 static uint8_t megaraid_mbox_version[8] =
208 { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 };
209
210
211 /*
212 * PCI table for all supported controllers.
213 */
214 static struct pci_device_id pci_id_table_g[] = {
215 {
216 PCI_VENDOR_ID_DELL,
217 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
218 PCI_VENDOR_ID_DELL,
219 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
220 },
221 {
222 PCI_VENDOR_ID_LSI_LOGIC,
223 PCI_DEVICE_ID_PERC4_SC,
224 PCI_VENDOR_ID_DELL,
225 PCI_SUBSYS_ID_PERC4_SC,
226 },
227 {
228 PCI_VENDOR_ID_LSI_LOGIC,
229 PCI_DEVICE_ID_PERC4_DC,
230 PCI_VENDOR_ID_DELL,
231 PCI_SUBSYS_ID_PERC4_DC,
232 },
233 {
234 PCI_VENDOR_ID_LSI_LOGIC,
235 PCI_DEVICE_ID_VERDE,
236 PCI_ANY_ID,
237 PCI_ANY_ID,
238 },
239 {
240 PCI_VENDOR_ID_DELL,
241 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
242 PCI_VENDOR_ID_DELL,
243 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
244 },
245 {
246 PCI_VENDOR_ID_DELL,
247 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
248 PCI_VENDOR_ID_DELL,
249 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
250 },
251 {
252 PCI_VENDOR_ID_DELL,
253 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
254 PCI_VENDOR_ID_DELL,
255 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
256 },
257 {
258 PCI_VENDOR_ID_DELL,
259 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
260 PCI_VENDOR_ID_DELL,
261 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
262 },
263 {
264 PCI_VENDOR_ID_DELL,
265 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
266 PCI_VENDOR_ID_DELL,
267 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
268 },
269 {
270 PCI_VENDOR_ID_DELL,
271 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
272 PCI_VENDOR_ID_DELL,
273 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
274 },
275 {
276 PCI_VENDOR_ID_LSI_LOGIC,
277 PCI_DEVICE_ID_DOBSON,
278 PCI_ANY_ID,
279 PCI_ANY_ID,
280 },
281 {
282 PCI_VENDOR_ID_AMI,
283 PCI_DEVICE_ID_AMI_MEGARAID3,
284 PCI_ANY_ID,
285 PCI_ANY_ID,
286 },
287 {
288 PCI_VENDOR_ID_LSI_LOGIC,
289 PCI_DEVICE_ID_AMI_MEGARAID3,
290 PCI_ANY_ID,
291 PCI_ANY_ID,
292 },
293 {
294 PCI_VENDOR_ID_LSI_LOGIC,
295 PCI_DEVICE_ID_LINDSAY,
296 PCI_ANY_ID,
297 PCI_ANY_ID,
298 },
299 {0} /* Terminating entry */
300 };
301 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
302
303
304 static struct pci_driver megaraid_pci_driver = {
305 .name = "megaraid",
306 .id_table = pci_id_table_g,
307 .probe = megaraid_probe_one,
308 .remove = megaraid_detach_one,
309 .shutdown = megaraid_mbox_shutdown,
310 };
311
312
313
314 // definitions for the device attributes for exporting logical drive number
315 // for a scsi address (Host, Channel, Id, Lun)
316
317 DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
318 NULL);
319
320 // Host template initializer for megaraid mbox sysfs device attributes
321 static struct device_attribute *megaraid_shost_attrs[] = {
322 &dev_attr_megaraid_mbox_app_hndl,
323 NULL,
324 };
325
326
327 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
328
329 // Host template initializer for megaraid mbox sysfs device attributes
330 static struct device_attribute *megaraid_sdev_attrs[] = {
331 &dev_attr_megaraid_mbox_ld,
332 NULL,
333 };
334
335 /**
336 * megaraid_change_queue_depth - Change the device's queue depth
337 * @sdev: scsi device struct
338 * @qdepth: depth to set
339 * @reason: calling context
340 *
341 * Return value:
342 * actual depth set
343 */
344 static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth,
345 int reason)
346 {
347 if (reason != SCSI_QDEPTH_DEFAULT)
348 return -EOPNOTSUPP;
349
350 if (qdepth > MBOX_MAX_SCSI_CMDS)
351 qdepth = MBOX_MAX_SCSI_CMDS;
352 scsi_adjust_queue_depth(sdev, 0, qdepth);
353 return sdev->queue_depth;
354 }
355
356 /*
357 * Scsi host template for megaraid unified driver
358 */
359 static struct scsi_host_template megaraid_template_g = {
360 .module = THIS_MODULE,
361 .name = "LSI Logic MegaRAID driver",
362 .proc_name = "megaraid",
363 .queuecommand = megaraid_queue_command,
364 .eh_abort_handler = megaraid_abort_handler,
365 .eh_device_reset_handler = megaraid_reset_handler,
366 .eh_bus_reset_handler = megaraid_reset_handler,
367 .eh_host_reset_handler = megaraid_reset_handler,
368 .change_queue_depth = megaraid_change_queue_depth,
369 .use_clustering = ENABLE_CLUSTERING,
370 .no_write_same = 1,
371 .sdev_attrs = megaraid_sdev_attrs,
372 .shost_attrs = megaraid_shost_attrs,
373 };
374
375
376 /**
377 * megaraid_init - module load hook
378 *
379 * We register ourselves as hotplug enabled module and let PCI subsystem
380 * discover our adapters.
381 */
382 static int __init
383 megaraid_init(void)
384 {
385 int rval;
386
387 // Announce the driver version
388 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
389 MEGARAID_EXT_VERSION));
390
391 // check validity of module parameters
392 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
393
394 con_log(CL_ANN, (KERN_WARNING
395 "megaraid mailbox: max commands per lun reset to %d\n",
396 MBOX_MAX_SCSI_CMDS));
397
398 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
399 }
400
401
402 // register as a PCI hot-plug driver module
403 rval = pci_register_driver(&megaraid_pci_driver);
404 if (rval < 0) {
405 con_log(CL_ANN, (KERN_WARNING
406 "megaraid: could not register hotplug support.\n"));
407 }
408
409 return rval;
410 }
411
412
413 /**
414 * megaraid_exit - driver unload entry point
415 *
416 * We simply unwrap the megaraid_init routine here.
417 */
418 static void __exit
419 megaraid_exit(void)
420 {
421 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
422
423 // unregister as PCI hotplug driver
424 pci_unregister_driver(&megaraid_pci_driver);
425
426 return;
427 }
428
429
430 /**
431 * megaraid_probe_one - PCI hotplug entry point
432 * @pdev : handle to this controller's PCI configuration space
433 * @id : pci device id of the class of controllers
434 *
435 * This routine should be called whenever a new adapter is detected by the
436 * PCI hotplug susbsystem.
437 */
438 static int
439 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
440 {
441 adapter_t *adapter;
442
443
444 // detected a new controller
445 con_log(CL_ANN, (KERN_INFO
446 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
447 pdev->vendor, pdev->device, pdev->subsystem_vendor,
448 pdev->subsystem_device));
449
450 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
451 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
452
453 if (pci_enable_device(pdev)) {
454 con_log(CL_ANN, (KERN_WARNING
455 "megaraid: pci_enable_device failed\n"));
456
457 return -ENODEV;
458 }
459
460 // Enable bus-mastering on this controller
461 pci_set_master(pdev);
462
463 // Allocate the per driver initialization structure
464 adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL);
465
466 if (adapter == NULL) {
467 con_log(CL_ANN, (KERN_WARNING
468 "megaraid: out of memory, %s %d.\n", __func__, __LINE__));
469
470 goto out_probe_one;
471 }
472
473
474 // set up PCI related soft state and other pre-known parameters
475 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn;
476 adapter->irq = pdev->irq;
477 adapter->pdev = pdev;
478
479 atomic_set(&adapter->being_detached, 0);
480
481 // Setup the default DMA mask. This would be changed later on
482 // depending on hardware capabilities
483 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(32)) != 0) {
484
485 con_log(CL_ANN, (KERN_WARNING
486 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
487
488 goto out_free_adapter;
489 }
490
491
492 // Initialize the synchronization lock for kernel and LLD
493 spin_lock_init(&adapter->lock);
494
495 // Initialize the command queues: the list of free SCBs and the list
496 // of pending SCBs.
497 INIT_LIST_HEAD(&adapter->kscb_pool);
498 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
499
500 INIT_LIST_HEAD(&adapter->pend_list);
501 spin_lock_init(PENDING_LIST_LOCK(adapter));
502
503 INIT_LIST_HEAD(&adapter->completed_list);
504 spin_lock_init(COMPLETED_LIST_LOCK(adapter));
505
506
507 // Start the mailbox based controller
508 if (megaraid_init_mbox(adapter) != 0) {
509 con_log(CL_ANN, (KERN_WARNING
510 "megaraid: maibox adapter did not initialize\n"));
511
512 goto out_free_adapter;
513 }
514
515 // Register with LSI Common Management Module
516 if (megaraid_cmm_register(adapter) != 0) {
517
518 con_log(CL_ANN, (KERN_WARNING
519 "megaraid: could not register with management module\n"));
520
521 goto out_fini_mbox;
522 }
523
524 // setup adapter handle in PCI soft state
525 pci_set_drvdata(pdev, adapter);
526
527 // attach with scsi mid-layer
528 if (megaraid_io_attach(adapter) != 0) {
529
530 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
531
532 goto out_cmm_unreg;
533 }
534
535 return 0;
536
537 out_cmm_unreg:
538 megaraid_cmm_unregister(adapter);
539 out_fini_mbox:
540 megaraid_fini_mbox(adapter);
541 out_free_adapter:
542 kfree(adapter);
543 out_probe_one:
544 pci_disable_device(pdev);
545
546 return -ENODEV;
547 }
548
549
550 /**
551 * megaraid_detach_one - release framework resources and call LLD release routine
552 * @pdev : handle for our PCI configuration space
553 *
554 * This routine is called during driver unload. We free all the allocated
555 * resources and call the corresponding LLD so that it can also release all
556 * its resources.
557 *
558 * This routine is also called from the PCI hotplug system.
559 */
560 static void
561 megaraid_detach_one(struct pci_dev *pdev)
562 {
563 adapter_t *adapter;
564 struct Scsi_Host *host;
565
566
567 // Start a rollback on this adapter
568 adapter = pci_get_drvdata(pdev);
569
570 if (!adapter) {
571 con_log(CL_ANN, (KERN_CRIT
572 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
573 pdev->vendor, pdev->device, pdev->subsystem_vendor,
574 pdev->subsystem_device));
575
576 return;
577 }
578 else {
579 con_log(CL_ANN, (KERN_NOTICE
580 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
581 pdev->vendor, pdev->device, pdev->subsystem_vendor,
582 pdev->subsystem_device));
583 }
584
585
586 host = adapter->host;
587
588 // do not allow any more requests from the management module for this
589 // adapter.
590 // FIXME: How do we account for the request which might still be
591 // pending with us?
592 atomic_set(&adapter->being_detached, 1);
593
594 // detach from the IO sub-system
595 megaraid_io_detach(adapter);
596
597 // Unregister from common management module
598 //
599 // FIXME: this must return success or failure for conditions if there
600 // is a command pending with LLD or not.
601 megaraid_cmm_unregister(adapter);
602
603 // finalize the mailbox based controller and release all resources
604 megaraid_fini_mbox(adapter);
605
606 kfree(adapter);
607
608 scsi_host_put(host);
609
610 pci_disable_device(pdev);
611
612 return;
613 }
614
615
616 /**
617 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
618 * @pdev : generic driver model device
619 *
620 * Shutdown notification, perform flush cache.
621 */
622 static void
623 megaraid_mbox_shutdown(struct pci_dev *pdev)
624 {
625 adapter_t *adapter = pci_get_drvdata(pdev);
626 static int counter;
627
628 if (!adapter) {
629 con_log(CL_ANN, (KERN_WARNING
630 "megaraid: null device in shutdown\n"));
631 return;
632 }
633
634 // flush caches now
635 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
636 counter++));
637
638 megaraid_mbox_flush_cache(adapter);
639
640 con_log(CL_ANN, ("done\n"));
641 }
642
643
644 /**
645 * megaraid_io_attach - attach a device with the IO subsystem
646 * @adapter : controller's soft state
647 *
648 * Attach this device with the IO subsystem.
649 */
650 static int
651 megaraid_io_attach(adapter_t *adapter)
652 {
653 struct Scsi_Host *host;
654
655 // Initialize SCSI Host structure
656 host = scsi_host_alloc(&megaraid_template_g, 8);
657 if (!host) {
658 con_log(CL_ANN, (KERN_WARNING
659 "megaraid mbox: scsi_register failed\n"));
660
661 return -1;
662 }
663
664 SCSIHOST2ADAP(host) = (caddr_t)adapter;
665 adapter->host = host;
666
667 host->irq = adapter->irq;
668 host->unique_id = adapter->unique_id;
669 host->can_queue = adapter->max_cmds;
670 host->this_id = adapter->init_id;
671 host->sg_tablesize = adapter->sglen;
672 host->max_sectors = adapter->max_sectors;
673 host->cmd_per_lun = adapter->cmd_per_lun;
674 host->max_channel = adapter->max_channel;
675 host->max_id = adapter->max_target;
676 host->max_lun = adapter->max_lun;
677
678
679 // notify mid-layer about the new controller
680 if (scsi_add_host(host, &adapter->pdev->dev)) {
681
682 con_log(CL_ANN, (KERN_WARNING
683 "megaraid mbox: scsi_add_host failed\n"));
684
685 scsi_host_put(host);
686
687 return -1;
688 }
689
690 scsi_scan_host(host);
691
692 return 0;
693 }
694
695
696 /**
697 * megaraid_io_detach - detach a device from the IO subsystem
698 * @adapter : controller's soft state
699 *
700 * Detach this device from the IO subsystem.
701 */
702 static void
703 megaraid_io_detach(adapter_t *adapter)
704 {
705 struct Scsi_Host *host;
706
707 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
708
709 host = adapter->host;
710
711 scsi_remove_host(host);
712
713 return;
714 }
715
716
717 /*
718 * START: Mailbox Low Level Driver
719 *
720 * This is section specific to the single mailbox based controllers
721 */
722
723 /**
724 * megaraid_init_mbox - initialize controller
725 * @adapter : our soft state
726 *
727 * - Allocate 16-byte aligned mailbox memory for firmware handshake
728 * - Allocate controller's memory resources
729 * - Find out all initialization data
730 * - Allocate memory required for all the commands
731 * - Use internal library of FW routines, build up complete soft state
732 */
733 static int
734 megaraid_init_mbox(adapter_t *adapter)
735 {
736 struct pci_dev *pdev;
737 mraid_device_t *raid_dev;
738 int i;
739 uint32_t magic64;
740
741
742 adapter->ito = MBOX_TIMEOUT;
743 pdev = adapter->pdev;
744
745 /*
746 * Allocate and initialize the init data structure for mailbox
747 * controllers
748 */
749 raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL);
750 if (raid_dev == NULL) return -1;
751
752
753 /*
754 * Attach the adapter soft state to raid device soft state
755 */
756 adapter->raid_device = (caddr_t)raid_dev;
757 raid_dev->fast_load = megaraid_fast_load;
758
759
760 // our baseport
761 raid_dev->baseport = pci_resource_start(pdev, 0);
762
763 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
764
765 con_log(CL_ANN, (KERN_WARNING
766 "megaraid: mem region busy\n"));
767
768 goto out_free_raid_dev;
769 }
770
771 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
772
773 if (!raid_dev->baseaddr) {
774
775 con_log(CL_ANN, (KERN_WARNING
776 "megaraid: could not map hba memory\n") );
777
778 goto out_release_regions;
779 }
780
781 /* initialize the mutual exclusion lock for the mailbox */
782 spin_lock_init(&raid_dev->mailbox_lock);
783
784 /* allocate memory required for commands */
785 if (megaraid_alloc_cmd_packets(adapter) != 0)
786 goto out_iounmap;
787
788 /*
789 * Issue SYNC cmd to flush the pending cmds in the adapter
790 * and initialize its internal state
791 */
792
793 if (megaraid_mbox_fire_sync_cmd(adapter))
794 con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
795
796 /*
797 * Setup the rest of the soft state using the library of
798 * FW routines
799 */
800
801 /* request IRQ and register the interrupt service routine */
802 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
803 adapter)) {
804
805 con_log(CL_ANN, (KERN_WARNING
806 "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
807 goto out_alloc_cmds;
808
809 }
810
811 // Product info
812 if (megaraid_mbox_product_info(adapter) != 0)
813 goto out_free_irq;
814
815 // Do we support extended CDBs
816 adapter->max_cdb_sz = 10;
817 if (megaraid_mbox_extended_cdb(adapter) == 0) {
818 adapter->max_cdb_sz = 16;
819 }
820
821 /*
822 * Do we support cluster environment, if we do, what is the initiator
823 * id.
824 * NOTE: In a non-cluster aware firmware environment, the LLD should
825 * return 7 as initiator id.
826 */
827 adapter->ha = 0;
828 adapter->init_id = -1;
829 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
830 adapter->ha = 1;
831 }
832
833 /*
834 * Prepare the device ids array to have the mapping between the kernel
835 * device address and megaraid device address.
836 * We export the physical devices on their actual addresses. The
837 * logical drives are exported on a virtual SCSI channel
838 */
839 megaraid_mbox_setup_device_map(adapter);
840
841 // If the firmware supports random deletion, update the device id map
842 if (megaraid_mbox_support_random_del(adapter)) {
843
844 // Change the logical drives numbers in device_ids array one
845 // slot in device_ids is reserved for target id, that's why
846 // "<=" below
847 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
848 adapter->device_ids[adapter->max_channel][i] += 0x80;
849 }
850 adapter->device_ids[adapter->max_channel][adapter->init_id] =
851 0xFF;
852
853 raid_dev->random_del_supported = 1;
854 }
855
856 /*
857 * find out the maximum number of scatter-gather elements supported by
858 * this firmware
859 */
860 adapter->sglen = megaraid_mbox_get_max_sg(adapter);
861
862 // enumerate RAID and SCSI channels so that all devices on SCSI
863 // channels can later be exported, including disk devices
864 megaraid_mbox_enum_raid_scsi(adapter);
865
866 /*
867 * Other parameters required by upper layer
868 *
869 * maximum number of sectors per IO command
870 */
871 adapter->max_sectors = megaraid_max_sectors;
872
873 /*
874 * number of queued commands per LUN.
875 */
876 adapter->cmd_per_lun = megaraid_cmd_per_lun;
877
878 /*
879 * Allocate resources required to issue FW calls, when sysfs is
880 * accessed
881 */
882 if (megaraid_sysfs_alloc_resources(adapter) != 0)
883 goto out_free_irq;
884
885 // Set the DMA mask to 64-bit. All supported controllers as capable of
886 // DMA in this range
887 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
888
889 if (((magic64 == HBA_SIGNATURE_64_BIT) &&
890 ((adapter->pdev->subsystem_device !=
891 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
892 (adapter->pdev->subsystem_device !=
893 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
894 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
895 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
896 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
897 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
898 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
899 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
900 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
901 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
902 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
903 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
904 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(64))) {
905 con_log(CL_ANN, (KERN_WARNING
906 "megaraid: DMA mask for 64-bit failed\n"));
907
908 if (pci_set_dma_mask (adapter->pdev, DMA_BIT_MASK(32))) {
909 con_log(CL_ANN, (KERN_WARNING
910 "megaraid: 32-bit DMA mask failed\n"));
911 goto out_free_sysfs_res;
912 }
913 }
914 }
915
916 // setup tasklet for DPC
917 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
918 (unsigned long)adapter);
919
920 con_log(CL_DLEVEL1, (KERN_INFO
921 "megaraid mbox hba successfully initialized\n"));
922
923 return 0;
924
925 out_free_sysfs_res:
926 megaraid_sysfs_free_resources(adapter);
927 out_free_irq:
928 free_irq(adapter->irq, adapter);
929 out_alloc_cmds:
930 megaraid_free_cmd_packets(adapter);
931 out_iounmap:
932 iounmap(raid_dev->baseaddr);
933 out_release_regions:
934 pci_release_regions(pdev);
935 out_free_raid_dev:
936 kfree(raid_dev);
937
938 return -1;
939 }
940
941
942 /**
943 * megaraid_fini_mbox - undo controller initialization
944 * @adapter : our soft state
945 */
946 static void
947 megaraid_fini_mbox(adapter_t *adapter)
948 {
949 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
950
951 // flush all caches
952 megaraid_mbox_flush_cache(adapter);
953
954 tasklet_kill(&adapter->dpc_h);
955
956 megaraid_sysfs_free_resources(adapter);
957
958 megaraid_free_cmd_packets(adapter);
959
960 free_irq(adapter->irq, adapter);
961
962 iounmap(raid_dev->baseaddr);
963
964 pci_release_regions(adapter->pdev);
965
966 kfree(raid_dev);
967
968 return;
969 }
970
971
972 /**
973 * megaraid_alloc_cmd_packets - allocate shared mailbox
974 * @adapter : soft state of the raid controller
975 *
976 * Allocate and align the shared mailbox. This maibox is used to issue
977 * all the commands. For IO based controllers, the mailbox is also registered
978 * with the FW. Allocate memory for all commands as well.
979 * This is our big allocator.
980 */
981 static int
982 megaraid_alloc_cmd_packets(adapter_t *adapter)
983 {
984 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
985 struct pci_dev *pdev;
986 unsigned long align;
987 scb_t *scb;
988 mbox_ccb_t *ccb;
989 struct mraid_pci_blk *epthru_pci_blk;
990 struct mraid_pci_blk *sg_pci_blk;
991 struct mraid_pci_blk *mbox_pci_blk;
992 int i;
993
994 pdev = adapter->pdev;
995
996 /*
997 * Setup the mailbox
998 * Allocate the common 16-byte aligned memory for the handshake
999 * mailbox.
1000 */
1001 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
1002 sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
1003
1004 if (!raid_dev->una_mbox64) {
1005 con_log(CL_ANN, (KERN_WARNING
1006 "megaraid: out of memory, %s %d\n", __func__,
1007 __LINE__));
1008 return -1;
1009 }
1010 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
1011
1012 /*
1013 * Align the mailbox at 16-byte boundary
1014 */
1015 raid_dev->mbox = &raid_dev->una_mbox64->mbox32;
1016
1017 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
1018 (~0UL ^ 0xFUL));
1019
1020 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
1021
1022 align = ((void *)raid_dev->mbox -
1023 ((void *)&raid_dev->una_mbox64->mbox32));
1024
1025 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1026 align;
1027
1028 // Allocate memory for commands issued internally
1029 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
1030 &adapter->ibuf_dma_h);
1031 if (!adapter->ibuf) {
1032
1033 con_log(CL_ANN, (KERN_WARNING
1034 "megaraid: out of memory, %s %d\n", __func__,
1035 __LINE__));
1036
1037 goto out_free_common_mbox;
1038 }
1039 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
1040
1041 // Allocate memory for our SCSI Command Blocks and their associated
1042 // memory
1043
1044 /*
1045 * Allocate memory for the base list of scb. Later allocate memory for
1046 * CCBs and embedded components of each CCB and point the pointers in
1047 * scb to the allocated components
1048 * NOTE: The code to allocate SCB will be duplicated in all the LLD
1049 * since the calling routine does not yet know the number of available
1050 * commands.
1051 */
1052 adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL);
1053
1054 if (adapter->kscb_list == NULL) {
1055 con_log(CL_ANN, (KERN_WARNING
1056 "megaraid: out of memory, %s %d\n", __func__,
1057 __LINE__));
1058 goto out_free_ibuf;
1059 }
1060
1061 // memory allocation for our command packets
1062 if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1063 con_log(CL_ANN, (KERN_WARNING
1064 "megaraid: out of memory, %s %d\n", __func__,
1065 __LINE__));
1066 goto out_free_scb_list;
1067 }
1068
1069 // Adjust the scb pointers and link in the free pool
1070 epthru_pci_blk = raid_dev->epthru_pool;
1071 sg_pci_blk = raid_dev->sg_pool;
1072 mbox_pci_blk = raid_dev->mbox_pool;
1073
1074 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1075 scb = adapter->kscb_list + i;
1076 ccb = raid_dev->ccb_list + i;
1077
1078 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1079 ccb->raw_mbox = (uint8_t *)ccb->mbox;
1080 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1081 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1082
1083 // make sure the mailbox is aligned properly
1084 if (ccb->mbox_dma_h & 0x0F) {
1085 con_log(CL_ANN, (KERN_CRIT
1086 "megaraid mbox: not aligned on 16-bytes\n"));
1087
1088 goto out_teardown_dma_pools;
1089 }
1090
1091 ccb->epthru = (mraid_epassthru_t *)
1092 epthru_pci_blk[i].vaddr;
1093 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr;
1094 ccb->pthru = (mraid_passthru_t *)ccb->epthru;
1095 ccb->pthru_dma_h = ccb->epthru_dma_h;
1096
1097
1098 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1099 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr;
1100 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64;
1101
1102 scb->ccb = (caddr_t)ccb;
1103 scb->gp = 0;
1104
1105 scb->sno = i; // command index
1106
1107 scb->scp = NULL;
1108 scb->state = SCB_FREE;
1109 scb->dma_direction = PCI_DMA_NONE;
1110 scb->dma_type = MRAID_DMA_NONE;
1111 scb->dev_channel = -1;
1112 scb->dev_target = -1;
1113
1114 // put scb in the free pool
1115 list_add_tail(&scb->list, &adapter->kscb_pool);
1116 }
1117
1118 return 0;
1119
1120 out_teardown_dma_pools:
1121 megaraid_mbox_teardown_dma_pools(adapter);
1122 out_free_scb_list:
1123 kfree(adapter->kscb_list);
1124 out_free_ibuf:
1125 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1126 adapter->ibuf_dma_h);
1127 out_free_common_mbox:
1128 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1129 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1130
1131 return -1;
1132 }
1133
1134
1135 /**
1136 * megaraid_free_cmd_packets - free memory
1137 * @adapter : soft state of the raid controller
1138 *
1139 * Release memory resources allocated for commands.
1140 */
1141 static void
1142 megaraid_free_cmd_packets(adapter_t *adapter)
1143 {
1144 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1145
1146 megaraid_mbox_teardown_dma_pools(adapter);
1147
1148 kfree(adapter->kscb_list);
1149
1150 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1151 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1152
1153 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1154 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1155 return;
1156 }
1157
1158
1159 /**
1160 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1161 * @adapter : HBA soft state
1162 *
1163 * Setup the dma pools for mailbox, passthru and extended passthru structures,
1164 * and scatter-gather lists.
1165 */
1166 static int
1167 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1168 {
1169 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1170 struct mraid_pci_blk *epthru_pci_blk;
1171 struct mraid_pci_blk *sg_pci_blk;
1172 struct mraid_pci_blk *mbox_pci_blk;
1173 int i;
1174
1175
1176
1177 // Allocate memory for 16-bytes aligned mailboxes
1178 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1179 adapter->pdev,
1180 sizeof(mbox64_t) + 16,
1181 16, 0);
1182
1183 if (raid_dev->mbox_pool_handle == NULL) {
1184 goto fail_setup_dma_pool;
1185 }
1186
1187 mbox_pci_blk = raid_dev->mbox_pool;
1188 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1189 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1190 raid_dev->mbox_pool_handle,
1191 GFP_KERNEL,
1192 &mbox_pci_blk[i].dma_addr);
1193 if (!mbox_pci_blk[i].vaddr) {
1194 goto fail_setup_dma_pool;
1195 }
1196 }
1197
1198 /*
1199 * Allocate memory for each embedded passthru strucuture pointer
1200 * Request for a 128 bytes aligned structure for each passthru command
1201 * structure
1202 * Since passthru and extended passthru commands are exclusive, they
1203 * share common memory pool. Passthru structures piggyback on memory
1204 * allocted to extended passthru since passthru is smaller of the two
1205 */
1206 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1207 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1208
1209 if (raid_dev->epthru_pool_handle == NULL) {
1210 goto fail_setup_dma_pool;
1211 }
1212
1213 epthru_pci_blk = raid_dev->epthru_pool;
1214 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1215 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1216 raid_dev->epthru_pool_handle,
1217 GFP_KERNEL,
1218 &epthru_pci_blk[i].dma_addr);
1219 if (!epthru_pci_blk[i].vaddr) {
1220 goto fail_setup_dma_pool;
1221 }
1222 }
1223
1224
1225 // Allocate memory for each scatter-gather list. Request for 512 bytes
1226 // alignment for each sg list
1227 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1228 adapter->pdev,
1229 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1230 512, 0);
1231
1232 if (raid_dev->sg_pool_handle == NULL) {
1233 goto fail_setup_dma_pool;
1234 }
1235
1236 sg_pci_blk = raid_dev->sg_pool;
1237 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1238 sg_pci_blk[i].vaddr = pci_pool_alloc(
1239 raid_dev->sg_pool_handle,
1240 GFP_KERNEL,
1241 &sg_pci_blk[i].dma_addr);
1242 if (!sg_pci_blk[i].vaddr) {
1243 goto fail_setup_dma_pool;
1244 }
1245 }
1246
1247 return 0;
1248
1249 fail_setup_dma_pool:
1250 megaraid_mbox_teardown_dma_pools(adapter);
1251 return -1;
1252 }
1253
1254
1255 /**
1256 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1257 * @adapter : HBA soft state
1258 *
1259 * Teardown the dma pool for mailbox, passthru and extended passthru
1260 * structures, and scatter-gather lists.
1261 */
1262 static void
1263 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1264 {
1265 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1266 struct mraid_pci_blk *epthru_pci_blk;
1267 struct mraid_pci_blk *sg_pci_blk;
1268 struct mraid_pci_blk *mbox_pci_blk;
1269 int i;
1270
1271
1272 sg_pci_blk = raid_dev->sg_pool;
1273 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1274 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1275 sg_pci_blk[i].dma_addr);
1276 }
1277 if (raid_dev->sg_pool_handle)
1278 pci_pool_destroy(raid_dev->sg_pool_handle);
1279
1280
1281 epthru_pci_blk = raid_dev->epthru_pool;
1282 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1283 pci_pool_free(raid_dev->epthru_pool_handle,
1284 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1285 }
1286 if (raid_dev->epthru_pool_handle)
1287 pci_pool_destroy(raid_dev->epthru_pool_handle);
1288
1289
1290 mbox_pci_blk = raid_dev->mbox_pool;
1291 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1292 pci_pool_free(raid_dev->mbox_pool_handle,
1293 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1294 }
1295 if (raid_dev->mbox_pool_handle)
1296 pci_pool_destroy(raid_dev->mbox_pool_handle);
1297
1298 return;
1299 }
1300
1301
1302 /**
1303 * megaraid_alloc_scb - detach and return a scb from the free list
1304 * @adapter : controller's soft state
1305 * @scp : pointer to the scsi command to be executed
1306 *
1307 * Return the scb from the head of the free list. %NULL if there are none
1308 * available.
1309 */
1310 static scb_t *
1311 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1312 {
1313 struct list_head *head = &adapter->kscb_pool;
1314 scb_t *scb = NULL;
1315 unsigned long flags;
1316
1317 // detach scb from free pool
1318 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1319
1320 if (list_empty(head)) {
1321 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1322 return NULL;
1323 }
1324
1325 scb = list_entry(head->next, scb_t, list);
1326 list_del_init(&scb->list);
1327
1328 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1329
1330 scb->state = SCB_ACTIVE;
1331 scb->scp = scp;
1332 scb->dma_type = MRAID_DMA_NONE;
1333
1334 return scb;
1335 }
1336
1337
1338 /**
1339 * megaraid_dealloc_scb - return the scb to the free pool
1340 * @adapter : controller's soft state
1341 * @scb : scb to be freed
1342 *
1343 * Return the scb back to the free list of scbs. The caller must 'flush' the
1344 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1345 * NOTE NOTE: Make sure the scb is not on any list before calling this
1346 * routine.
1347 */
1348 static inline void
1349 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1350 {
1351 unsigned long flags;
1352
1353 // put scb in the free pool
1354 scb->state = SCB_FREE;
1355 scb->scp = NULL;
1356 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1357
1358 list_add(&scb->list, &adapter->kscb_pool);
1359
1360 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1361
1362 return;
1363 }
1364
1365
1366 /**
1367 * megaraid_mbox_mksgl - make the scatter-gather list
1368 * @adapter : controller's soft state
1369 * @scb : scsi control block
1370 *
1371 * Prepare the scatter-gather list.
1372 */
1373 static int
1374 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1375 {
1376 struct scatterlist *sgl;
1377 mbox_ccb_t *ccb;
1378 struct scsi_cmnd *scp;
1379 int sgcnt;
1380 int i;
1381
1382
1383 scp = scb->scp;
1384 ccb = (mbox_ccb_t *)scb->ccb;
1385
1386 sgcnt = scsi_dma_map(scp);
1387 BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen);
1388
1389 // no mapping required if no data to be transferred
1390 if (!sgcnt)
1391 return 0;
1392
1393 scb->dma_type = MRAID_DMA_WSG;
1394
1395 scsi_for_each_sg(scp, sgl, sgcnt, i) {
1396 ccb->sgl64[i].address = sg_dma_address(sgl);
1397 ccb->sgl64[i].length = sg_dma_len(sgl);
1398 }
1399
1400 // Return count of SG nodes
1401 return sgcnt;
1402 }
1403
1404
1405 /**
1406 * mbox_post_cmd - issue a mailbox command
1407 * @adapter : controller's soft state
1408 * @scb : command to be issued
1409 *
1410 * Post the command to the controller if mailbox is available.
1411 */
1412 static int
1413 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1414 {
1415 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1416 mbox64_t *mbox64;
1417 mbox_t *mbox;
1418 mbox_ccb_t *ccb;
1419 unsigned long flags;
1420 unsigned int i = 0;
1421
1422
1423 ccb = (mbox_ccb_t *)scb->ccb;
1424 mbox = raid_dev->mbox;
1425 mbox64 = raid_dev->mbox64;
1426
1427 /*
1428 * Check for busy mailbox. If it is, return failure - the caller
1429 * should retry later.
1430 */
1431 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1432
1433 if (unlikely(mbox->busy)) {
1434 do {
1435 udelay(1);
1436 i++;
1437 rmb();
1438 } while(mbox->busy && (i < max_mbox_busy_wait));
1439
1440 if (mbox->busy) {
1441
1442 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1443
1444 return -1;
1445 }
1446 }
1447
1448
1449 // Copy this command's mailbox data into "adapter's" mailbox
1450 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1451 mbox->cmdid = scb->sno;
1452
1453 adapter->outstanding_cmds++;
1454
1455 if (scb->dma_direction == PCI_DMA_TODEVICE)
1456 pci_dma_sync_sg_for_device(adapter->pdev,
1457 scsi_sglist(scb->scp),
1458 scsi_sg_count(scb->scp),
1459 PCI_DMA_TODEVICE);
1460
1461 mbox->busy = 1; // Set busy
1462 mbox->poll = 0;
1463 mbox->ack = 0;
1464 wmb();
1465
1466 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1467
1468 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1469
1470 return 0;
1471 }
1472
1473
1474 /**
1475 * megaraid_queue_command - generic queue entry point for all LLDs
1476 * @scp : pointer to the scsi command to be executed
1477 * @done : callback routine to be called after the cmd has be completed
1478 *
1479 * Queue entry point for mailbox based controllers.
1480 */
1481 static int
1482 megaraid_queue_command_lck(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *))
1483 {
1484 adapter_t *adapter;
1485 scb_t *scb;
1486 int if_busy;
1487
1488 adapter = SCP2ADAPTER(scp);
1489 scp->scsi_done = done;
1490 scp->result = 0;
1491
1492 /*
1493 * Allocate and build a SCB request
1494 * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1495 * not allocate scb. We will return non-zero status in that case.
1496 * NOTE: scb can be null even though certain commands completed
1497 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1498 * return 0 in that case, and we would do the callback right away.
1499 */
1500 if_busy = 0;
1501 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1502 if (!scb) { // command already completed
1503 done(scp);
1504 return 0;
1505 }
1506
1507 megaraid_mbox_runpendq(adapter, scb);
1508 return if_busy;
1509 }
1510
1511 static DEF_SCSI_QCMD(megaraid_queue_command)
1512
1513 /**
1514 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
1515 * @adapter : controller's soft state
1516 * @scp : mid-layer scsi command pointer
1517 * @busy : set if request could not be completed because of lack of
1518 * resources
1519 *
1520 * Transform the mid-layer scsi command to megaraid firmware lingua.
1521 * Convert the command issued by mid-layer to format understood by megaraid
1522 * firmware. We also complete certain commands without sending them to firmware.
1523 */
1524 static scb_t *
1525 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1526 {
1527 mraid_device_t *rdev = ADAP2RAIDDEV(adapter);
1528 int channel;
1529 int target;
1530 int islogical;
1531 mbox_ccb_t *ccb;
1532 mraid_passthru_t *pthru;
1533 mbox64_t *mbox64;
1534 mbox_t *mbox;
1535 scb_t *scb;
1536 char skip[] = "skipping";
1537 char scan[] = "scanning";
1538 char *ss;
1539
1540
1541 /*
1542 * Get the appropriate device map for the device this command is
1543 * intended for
1544 */
1545 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1546
1547 /*
1548 * Logical drive commands
1549 */
1550 if (islogical) {
1551 switch (scp->cmnd[0]) {
1552 case TEST_UNIT_READY:
1553 /*
1554 * Do we support clustering and is the support enabled
1555 * If no, return success always
1556 */
1557 if (!adapter->ha) {
1558 scp->result = (DID_OK << 16);
1559 return NULL;
1560 }
1561
1562 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1563 scp->result = (DID_ERROR << 16);
1564 *busy = 1;
1565 return NULL;
1566 }
1567
1568 scb->dma_direction = scp->sc_data_direction;
1569 scb->dev_channel = 0xFF;
1570 scb->dev_target = target;
1571 ccb = (mbox_ccb_t *)scb->ccb;
1572
1573 /*
1574 * The command id will be provided by the command
1575 * issuance routine
1576 */
1577 ccb->raw_mbox[0] = CLUSTER_CMD;
1578 ccb->raw_mbox[2] = RESERVATION_STATUS;
1579 ccb->raw_mbox[3] = target;
1580
1581 return scb;
1582
1583 case MODE_SENSE:
1584 {
1585 struct scatterlist *sgl;
1586 caddr_t vaddr;
1587
1588 sgl = scsi_sglist(scp);
1589 if (sg_page(sgl)) {
1590 vaddr = (caddr_t) sg_virt(&sgl[0]);
1591
1592 memset(vaddr, 0, scp->cmnd[4]);
1593 }
1594 else {
1595 con_log(CL_ANN, (KERN_WARNING
1596 "megaraid mailbox: invalid sg:%d\n",
1597 __LINE__));
1598 }
1599 }
1600 scp->result = (DID_OK << 16);
1601 return NULL;
1602
1603 case INQUIRY:
1604 /*
1605 * Display the channel scan for logical drives
1606 * Do not display scan for a channel if already done.
1607 */
1608 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1609
1610 con_log(CL_ANN, (KERN_INFO
1611 "scsi[%d]: scanning scsi channel %d",
1612 adapter->host->host_no,
1613 SCP2CHANNEL(scp)));
1614
1615 con_log(CL_ANN, (
1616 " [virtual] for logical drives\n"));
1617
1618 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1619 }
1620
1621 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1622 scp->sense_buffer[0] = 0x70;
1623 scp->sense_buffer[2] = ILLEGAL_REQUEST;
1624 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB;
1625 scp->result = CHECK_CONDITION << 1;
1626 return NULL;
1627 }
1628
1629 /* Fall through */
1630
1631 case READ_CAPACITY:
1632 /*
1633 * Do not allow LUN > 0 for logical drives and
1634 * requests for more than 40 logical drives
1635 */
1636 if (SCP2LUN(scp)) {
1637 scp->result = (DID_BAD_TARGET << 16);
1638 return NULL;
1639 }
1640 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1641 scp->result = (DID_BAD_TARGET << 16);
1642 return NULL;
1643 }
1644
1645
1646 /* Allocate a SCB and initialize passthru */
1647 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1648 scp->result = (DID_ERROR << 16);
1649 *busy = 1;
1650 return NULL;
1651 }
1652
1653 ccb = (mbox_ccb_t *)scb->ccb;
1654 scb->dev_channel = 0xFF;
1655 scb->dev_target = target;
1656 pthru = ccb->pthru;
1657 mbox = ccb->mbox;
1658 mbox64 = ccb->mbox64;
1659
1660 pthru->timeout = 0;
1661 pthru->ars = 1;
1662 pthru->reqsenselen = 14;
1663 pthru->islogical = 1;
1664 pthru->logdrv = target;
1665 pthru->cdblen = scp->cmd_len;
1666 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1667
1668 mbox->cmd = MBOXCMD_PASSTHRU64;
1669 scb->dma_direction = scp->sc_data_direction;
1670
1671 pthru->dataxferlen = scsi_bufflen(scp);
1672 pthru->dataxferaddr = ccb->sgl_dma_h;
1673 pthru->numsge = megaraid_mbox_mksgl(adapter,
1674 scb);
1675
1676 mbox->xferaddr = 0xFFFFFFFF;
1677 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h;
1678 mbox64->xferaddr_hi = 0;
1679
1680 return scb;
1681
1682 case READ_6:
1683 case WRITE_6:
1684 case READ_10:
1685 case WRITE_10:
1686 case READ_12:
1687 case WRITE_12:
1688
1689 /*
1690 * Allocate a SCB and initialize mailbox
1691 */
1692 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1693 scp->result = (DID_ERROR << 16);
1694 *busy = 1;
1695 return NULL;
1696 }
1697 ccb = (mbox_ccb_t *)scb->ccb;
1698 scb->dev_channel = 0xFF;
1699 scb->dev_target = target;
1700 mbox = ccb->mbox;
1701 mbox64 = ccb->mbox64;
1702 mbox->logdrv = target;
1703
1704 /*
1705 * A little HACK: 2nd bit is zero for all scsi read
1706 * commands and is set for all scsi write commands
1707 */
1708 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64:
1709 MBOXCMD_LREAD64 ;
1710
1711 /*
1712 * 6-byte READ(0x08) or WRITE(0x0A) cdb
1713 */
1714 if (scp->cmd_len == 6) {
1715 mbox->numsectors = (uint32_t)scp->cmnd[4];
1716 mbox->lba =
1717 ((uint32_t)scp->cmnd[1] << 16) |
1718 ((uint32_t)scp->cmnd[2] << 8) |
1719 (uint32_t)scp->cmnd[3];
1720
1721 mbox->lba &= 0x1FFFFF;
1722 }
1723
1724 /*
1725 * 10-byte READ(0x28) or WRITE(0x2A) cdb
1726 */
1727 else if (scp->cmd_len == 10) {
1728 mbox->numsectors =
1729 (uint32_t)scp->cmnd[8] |
1730 ((uint32_t)scp->cmnd[7] << 8);
1731 mbox->lba =
1732 ((uint32_t)scp->cmnd[2] << 24) |
1733 ((uint32_t)scp->cmnd[3] << 16) |
1734 ((uint32_t)scp->cmnd[4] << 8) |
1735 (uint32_t)scp->cmnd[5];
1736 }
1737
1738 /*
1739 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1740 */
1741 else if (scp->cmd_len == 12) {
1742 mbox->lba =
1743 ((uint32_t)scp->cmnd[2] << 24) |
1744 ((uint32_t)scp->cmnd[3] << 16) |
1745 ((uint32_t)scp->cmnd[4] << 8) |
1746 (uint32_t)scp->cmnd[5];
1747
1748 mbox->numsectors =
1749 ((uint32_t)scp->cmnd[6] << 24) |
1750 ((uint32_t)scp->cmnd[7] << 16) |
1751 ((uint32_t)scp->cmnd[8] << 8) |
1752 (uint32_t)scp->cmnd[9];
1753 }
1754 else {
1755 con_log(CL_ANN, (KERN_WARNING
1756 "megaraid: unsupported CDB length\n"));
1757
1758 megaraid_dealloc_scb(adapter, scb);
1759
1760 scp->result = (DID_ERROR << 16);
1761 return NULL;
1762 }
1763
1764 scb->dma_direction = scp->sc_data_direction;
1765
1766 // Calculate Scatter-Gather info
1767 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h;
1768 mbox->numsge = megaraid_mbox_mksgl(adapter,
1769 scb);
1770 mbox->xferaddr = 0xFFFFFFFF;
1771 mbox64->xferaddr_hi = 0;
1772
1773 return scb;
1774
1775 case RESERVE:
1776 case RELEASE:
1777 /*
1778 * Do we support clustering and is the support enabled
1779 */
1780 if (!adapter->ha) {
1781 scp->result = (DID_BAD_TARGET << 16);
1782 return NULL;
1783 }
1784
1785 /*
1786 * Allocate a SCB and initialize mailbox
1787 */
1788 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1789 scp->result = (DID_ERROR << 16);
1790 *busy = 1;
1791 return NULL;
1792 }
1793
1794 ccb = (mbox_ccb_t *)scb->ccb;
1795 scb->dev_channel = 0xFF;
1796 scb->dev_target = target;
1797 ccb->raw_mbox[0] = CLUSTER_CMD;
1798 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ?
1799 RESERVE_LD : RELEASE_LD;
1800
1801 ccb->raw_mbox[3] = target;
1802 scb->dma_direction = scp->sc_data_direction;
1803
1804 return scb;
1805
1806 default:
1807 scp->result = (DID_BAD_TARGET << 16);
1808 return NULL;
1809 }
1810 }
1811 else { // Passthru device commands
1812
1813 // Do not allow access to target id > 15 or LUN > 7
1814 if (target > 15 || SCP2LUN(scp) > 7) {
1815 scp->result = (DID_BAD_TARGET << 16);
1816 return NULL;
1817 }
1818
1819 // if fast load option was set and scan for last device is
1820 // over, reset the fast_load flag so that during a possible
1821 // next scan, devices can be made available
1822 if (rdev->fast_load && (target == 15) &&
1823 (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1824
1825 con_log(CL_ANN, (KERN_INFO
1826 "megaraid[%d]: physical device scan re-enabled\n",
1827 adapter->host->host_no));
1828 rdev->fast_load = 0;
1829 }
1830
1831 /*
1832 * Display the channel scan for physical devices
1833 */
1834 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1835
1836 ss = rdev->fast_load ? skip : scan;
1837
1838 con_log(CL_ANN, (KERN_INFO
1839 "scsi[%d]: %s scsi channel %d [Phy %d]",
1840 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1841 channel));
1842
1843 con_log(CL_ANN, (
1844 " for non-raid devices\n"));
1845
1846 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1847 }
1848
1849 // disable channel sweep if fast load option given
1850 if (rdev->fast_load) {
1851 scp->result = (DID_BAD_TARGET << 16);
1852 return NULL;
1853 }
1854
1855 // Allocate a SCB and initialize passthru
1856 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1857 scp->result = (DID_ERROR << 16);
1858 *busy = 1;
1859 return NULL;
1860 }
1861
1862 ccb = (mbox_ccb_t *)scb->ccb;
1863 scb->dev_channel = channel;
1864 scb->dev_target = target;
1865 scb->dma_direction = scp->sc_data_direction;
1866 mbox = ccb->mbox;
1867 mbox64 = ccb->mbox64;
1868
1869 // Does this firmware support extended CDBs
1870 if (adapter->max_cdb_sz == 16) {
1871 mbox->cmd = MBOXCMD_EXTPTHRU;
1872
1873 megaraid_mbox_prepare_epthru(adapter, scb, scp);
1874
1875 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h;
1876 mbox64->xferaddr_hi = 0;
1877 mbox->xferaddr = 0xFFFFFFFF;
1878 }
1879 else {
1880 mbox->cmd = MBOXCMD_PASSTHRU64;
1881
1882 megaraid_mbox_prepare_pthru(adapter, scb, scp);
1883
1884 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h;
1885 mbox64->xferaddr_hi = 0;
1886 mbox->xferaddr = 0xFFFFFFFF;
1887 }
1888 return scb;
1889 }
1890
1891 // NOT REACHED
1892 }
1893
1894
1895 /**
1896 * megaraid_mbox_runpendq - execute commands queued in the pending queue
1897 * @adapter : controller's soft state
1898 * @scb_q : SCB to be queued in the pending list
1899 *
1900 * Scan the pending list for commands which are not yet issued and try to
1901 * post to the controller. The SCB can be a null pointer, which would indicate
1902 * no SCB to be queue, just try to execute the ones in the pending list.
1903 *
1904 * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1905 * out from the head of the pending list. If it is successfully issued, the
1906 * next SCB is at the head now.
1907 */
1908 static void
1909 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1910 {
1911 scb_t *scb;
1912 unsigned long flags;
1913
1914 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1915
1916 if (scb_q) {
1917 scb_q->state = SCB_PENDQ;
1918 list_add_tail(&scb_q->list, &adapter->pend_list);
1919 }
1920
1921 // if the adapter in not in quiescent mode, post the commands to FW
1922 if (adapter->quiescent) {
1923 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1924 return;
1925 }
1926
1927 while (!list_empty(&adapter->pend_list)) {
1928
1929 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1930
1931 scb = list_entry(adapter->pend_list.next, scb_t, list);
1932
1933 // remove the scb from the pending list and try to
1934 // issue. If we are unable to issue it, put back in
1935 // the pending list and return
1936
1937 list_del_init(&scb->list);
1938
1939 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1940
1941 // if mailbox was busy, return SCB back to pending
1942 // list. Make sure to add at the head, since that's
1943 // where it would have been removed from
1944
1945 scb->state = SCB_ISSUED;
1946
1947 if (mbox_post_cmd(adapter, scb) != 0) {
1948
1949 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1950
1951 scb->state = SCB_PENDQ;
1952
1953 list_add(&scb->list, &adapter->pend_list);
1954
1955 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1956 flags);
1957
1958 return;
1959 }
1960
1961 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1962 }
1963
1964 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1965
1966
1967 return;
1968 }
1969
1970
1971 /**
1972 * megaraid_mbox_prepare_pthru - prepare a command for physical devices
1973 * @adapter : pointer to controller's soft state
1974 * @scb : scsi control block
1975 * @scp : scsi command from the mid-layer
1976 *
1977 * Prepare a command for the scsi physical devices.
1978 */
1979 static void
1980 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1981 struct scsi_cmnd *scp)
1982 {
1983 mbox_ccb_t *ccb;
1984 mraid_passthru_t *pthru;
1985 uint8_t channel;
1986 uint8_t target;
1987
1988 ccb = (mbox_ccb_t *)scb->ccb;
1989 pthru = ccb->pthru;
1990 channel = scb->dev_channel;
1991 target = scb->dev_target;
1992
1993 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1994 pthru->timeout = 4;
1995 pthru->ars = 1;
1996 pthru->islogical = 0;
1997 pthru->channel = 0;
1998 pthru->target = (channel << 4) | target;
1999 pthru->logdrv = SCP2LUN(scp);
2000 pthru->reqsenselen = 14;
2001 pthru->cdblen = scp->cmd_len;
2002
2003 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2004
2005 if (scsi_bufflen(scp)) {
2006 pthru->dataxferlen = scsi_bufflen(scp);
2007 pthru->dataxferaddr = ccb->sgl_dma_h;
2008 pthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2009 }
2010 else {
2011 pthru->dataxferaddr = 0;
2012 pthru->dataxferlen = 0;
2013 pthru->numsge = 0;
2014 }
2015 return;
2016 }
2017
2018
2019 /**
2020 * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2021 * @adapter : pointer to controller's soft state
2022 * @scb : scsi control block
2023 * @scp : scsi command from the mid-layer
2024 *
2025 * Prepare a command for the scsi physical devices. This routine prepares
2026 * commands for devices which can take extended CDBs (>10 bytes).
2027 */
2028 static void
2029 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2030 struct scsi_cmnd *scp)
2031 {
2032 mbox_ccb_t *ccb;
2033 mraid_epassthru_t *epthru;
2034 uint8_t channel;
2035 uint8_t target;
2036
2037 ccb = (mbox_ccb_t *)scb->ccb;
2038 epthru = ccb->epthru;
2039 channel = scb->dev_channel;
2040 target = scb->dev_target;
2041
2042 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2043 epthru->timeout = 4;
2044 epthru->ars = 1;
2045 epthru->islogical = 0;
2046 epthru->channel = 0;
2047 epthru->target = (channel << 4) | target;
2048 epthru->logdrv = SCP2LUN(scp);
2049 epthru->reqsenselen = 14;
2050 epthru->cdblen = scp->cmd_len;
2051
2052 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2053
2054 if (scsi_bufflen(scp)) {
2055 epthru->dataxferlen = scsi_bufflen(scp);
2056 epthru->dataxferaddr = ccb->sgl_dma_h;
2057 epthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2058 }
2059 else {
2060 epthru->dataxferaddr = 0;
2061 epthru->dataxferlen = 0;
2062 epthru->numsge = 0;
2063 }
2064 return;
2065 }
2066
2067
2068 /**
2069 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2070 * @adapter : controller's soft state
2071 *
2072 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
2073 * completed command and put them on the completed list for later processing.
2074 *
2075 * Returns: 1 if the interrupt is valid, 0 otherwise
2076 */
2077 static int
2078 megaraid_ack_sequence(adapter_t *adapter)
2079 {
2080 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2081 mbox_t *mbox;
2082 scb_t *scb;
2083 uint8_t nstatus;
2084 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS];
2085 struct list_head clist;
2086 int handled;
2087 uint32_t dword;
2088 unsigned long flags;
2089 int i, j;
2090
2091
2092 mbox = raid_dev->mbox;
2093
2094 // move the SCBs from the firmware completed array to our local list
2095 INIT_LIST_HEAD(&clist);
2096
2097 // loop till F/W has more commands for us to complete
2098 handled = 0;
2099 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2100 do {
2101 /*
2102 * Check if a valid interrupt is pending. If found, force the
2103 * interrupt line low.
2104 */
2105 dword = RDOUTDOOR(raid_dev);
2106 if (dword != 0x10001234) break;
2107
2108 handled = 1;
2109
2110 WROUTDOOR(raid_dev, 0x10001234);
2111
2112 nstatus = 0;
2113 // wait for valid numstatus to post
2114 for (i = 0; i < 0xFFFFF; i++) {
2115 if (mbox->numstatus != 0xFF) {
2116 nstatus = mbox->numstatus;
2117 break;
2118 }
2119 rmb();
2120 }
2121 mbox->numstatus = 0xFF;
2122
2123 adapter->outstanding_cmds -= nstatus;
2124
2125 for (i = 0; i < nstatus; i++) {
2126
2127 // wait for valid command index to post
2128 for (j = 0; j < 0xFFFFF; j++) {
2129 if (mbox->completed[i] != 0xFF) break;
2130 rmb();
2131 }
2132 completed[i] = mbox->completed[i];
2133 mbox->completed[i] = 0xFF;
2134
2135 if (completed[i] == 0xFF) {
2136 con_log(CL_ANN, (KERN_CRIT
2137 "megaraid: command posting timed out\n"));
2138
2139 BUG();
2140 continue;
2141 }
2142
2143 // Get SCB associated with this command id
2144 if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2145 // a cmm command
2146 scb = adapter->uscb_list + (completed[i] -
2147 MBOX_MAX_SCSI_CMDS);
2148 }
2149 else {
2150 // an os command
2151 scb = adapter->kscb_list + completed[i];
2152 }
2153
2154 scb->status = mbox->status;
2155 list_add_tail(&scb->list, &clist);
2156 }
2157
2158 // Acknowledge interrupt
2159 WRINDOOR(raid_dev, 0x02);
2160
2161 } while(1);
2162
2163 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2164
2165
2166 // put the completed commands in the completed list. DPC would
2167 // complete these commands later
2168 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2169
2170 list_splice(&clist, &adapter->completed_list);
2171
2172 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2173
2174
2175 // schedule the DPC if there is some work for it
2176 if (handled)
2177 tasklet_schedule(&adapter->dpc_h);
2178
2179 return handled;
2180 }
2181
2182
2183 /**
2184 * megaraid_isr - isr for memory based mailbox based controllers
2185 * @irq : irq
2186 * @devp : pointer to our soft state
2187 *
2188 * Interrupt service routine for memory-mapped mailbox controllers.
2189 */
2190 static irqreturn_t
2191 megaraid_isr(int irq, void *devp)
2192 {
2193 adapter_t *adapter = devp;
2194 int handled;
2195
2196 handled = megaraid_ack_sequence(adapter);
2197
2198 /* Loop through any pending requests */
2199 if (!adapter->quiescent) {
2200 megaraid_mbox_runpendq(adapter, NULL);
2201 }
2202
2203 return IRQ_RETVAL(handled);
2204 }
2205
2206
2207 /**
2208 * megaraid_mbox_sync_scb - sync kernel buffers
2209 * @adapter : controller's soft state
2210 * @scb : pointer to the resource packet
2211 *
2212 * DMA sync if required.
2213 */
2214 static void
2215 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2216 {
2217 mbox_ccb_t *ccb;
2218
2219 ccb = (mbox_ccb_t *)scb->ccb;
2220
2221 if (scb->dma_direction == PCI_DMA_FROMDEVICE)
2222 pci_dma_sync_sg_for_cpu(adapter->pdev,
2223 scsi_sglist(scb->scp),
2224 scsi_sg_count(scb->scp),
2225 PCI_DMA_FROMDEVICE);
2226
2227 scsi_dma_unmap(scb->scp);
2228 return;
2229 }
2230
2231
2232 /**
2233 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2234 * @devp : pointer to HBA soft state
2235 *
2236 * Pick up the commands from the completed list and send back to the owners.
2237 * This is a reentrant function and does not assume any locks are held while
2238 * it is being called.
2239 */
2240 static void
2241 megaraid_mbox_dpc(unsigned long devp)
2242 {
2243 adapter_t *adapter = (adapter_t *)devp;
2244 mraid_device_t *raid_dev;
2245 struct list_head clist;
2246 struct scatterlist *sgl;
2247 scb_t *scb;
2248 scb_t *tmp;
2249 struct scsi_cmnd *scp;
2250 mraid_passthru_t *pthru;
2251 mraid_epassthru_t *epthru;
2252 mbox_ccb_t *ccb;
2253 int islogical;
2254 int pdev_index;
2255 int pdev_state;
2256 mbox_t *mbox;
2257 unsigned long flags;
2258 uint8_t c;
2259 int status;
2260 uioc_t *kioc;
2261
2262
2263 if (!adapter) return;
2264
2265 raid_dev = ADAP2RAIDDEV(adapter);
2266
2267 // move the SCBs from the completed list to our local list
2268 INIT_LIST_HEAD(&clist);
2269
2270 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2271
2272 list_splice_init(&adapter->completed_list, &clist);
2273
2274 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2275
2276
2277 list_for_each_entry_safe(scb, tmp, &clist, list) {
2278
2279 status = scb->status;
2280 scp = scb->scp;
2281 ccb = (mbox_ccb_t *)scb->ccb;
2282 pthru = ccb->pthru;
2283 epthru = ccb->epthru;
2284 mbox = ccb->mbox;
2285
2286 // Make sure f/w has completed a valid command
2287 if (scb->state != SCB_ISSUED) {
2288 con_log(CL_ANN, (KERN_CRIT
2289 "megaraid critical err: invalid command %d:%d:%p\n",
2290 scb->sno, scb->state, scp));
2291 BUG();
2292 continue; // Must never happen!
2293 }
2294
2295 // check for the management command and complete it right away
2296 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2297 scb->state = SCB_FREE;
2298 scb->status = status;
2299
2300 // remove from local clist
2301 list_del_init(&scb->list);
2302
2303 kioc = (uioc_t *)scb->gp;
2304 kioc->status = 0;
2305
2306 megaraid_mbox_mm_done(adapter, scb);
2307
2308 continue;
2309 }
2310
2311 // Was an abort issued for this command earlier
2312 if (scb->state & SCB_ABORT) {
2313 con_log(CL_ANN, (KERN_NOTICE
2314 "megaraid: aborted cmd [%x] completed\n",
2315 scb->sno));
2316 }
2317
2318 /*
2319 * If the inquiry came of a disk drive which is not part of
2320 * any RAID array, expose it to the kernel. For this to be
2321 * enabled, user must set the "megaraid_expose_unconf_disks"
2322 * flag to 1 by specifying it on module parameter list.
2323 * This would enable data migration off drives from other
2324 * configurations.
2325 */
2326 islogical = MRAID_IS_LOGICAL(adapter, scp);
2327 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2328 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2329
2330 sgl = scsi_sglist(scp);
2331 if (sg_page(sgl)) {
2332 c = *(unsigned char *) sg_virt(&sgl[0]);
2333 } else {
2334 con_log(CL_ANN, (KERN_WARNING
2335 "megaraid mailbox: invalid sg:%d\n",
2336 __LINE__));
2337 c = 0;
2338 }
2339
2340 if ((c & 0x1F ) == TYPE_DISK) {
2341 pdev_index = (scb->dev_channel * 16) +
2342 scb->dev_target;
2343 pdev_state =
2344 raid_dev->pdrv_state[pdev_index] & 0x0F;
2345
2346 if (pdev_state == PDRV_ONLINE ||
2347 pdev_state == PDRV_FAILED ||
2348 pdev_state == PDRV_RBLD ||
2349 pdev_state == PDRV_HOTSPARE ||
2350 megaraid_expose_unconf_disks == 0) {
2351
2352 status = 0xF0;
2353 }
2354 }
2355 }
2356
2357 // Convert MegaRAID status to Linux error code
2358 switch (status) {
2359
2360 case 0x00:
2361
2362 scp->result = (DID_OK << 16);
2363 break;
2364
2365 case 0x02:
2366
2367 /* set sense_buffer and result fields */
2368 if (mbox->cmd == MBOXCMD_PASSTHRU ||
2369 mbox->cmd == MBOXCMD_PASSTHRU64) {
2370
2371 memcpy(scp->sense_buffer, pthru->reqsensearea,
2372 14);
2373
2374 scp->result = DRIVER_SENSE << 24 |
2375 DID_OK << 16 | CHECK_CONDITION << 1;
2376 }
2377 else {
2378 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2379
2380 memcpy(scp->sense_buffer,
2381 epthru->reqsensearea, 14);
2382
2383 scp->result = DRIVER_SENSE << 24 |
2384 DID_OK << 16 |
2385 CHECK_CONDITION << 1;
2386 } else {
2387 scp->sense_buffer[0] = 0x70;
2388 scp->sense_buffer[2] = ABORTED_COMMAND;
2389 scp->result = CHECK_CONDITION << 1;
2390 }
2391 }
2392 break;
2393
2394 case 0x08:
2395
2396 scp->result = DID_BUS_BUSY << 16 | status;
2397 break;
2398
2399 default:
2400
2401 /*
2402 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2403 * failed
2404 */
2405 if (scp->cmnd[0] == TEST_UNIT_READY) {
2406 scp->result = DID_ERROR << 16 |
2407 RESERVATION_CONFLICT << 1;
2408 }
2409 else
2410 /*
2411 * Error code returned is 1 if Reserve or Release
2412 * failed or the input parameter is invalid
2413 */
2414 if (status == 1 && (scp->cmnd[0] == RESERVE ||
2415 scp->cmnd[0] == RELEASE)) {
2416
2417 scp->result = DID_ERROR << 16 |
2418 RESERVATION_CONFLICT << 1;
2419 }
2420 else {
2421 scp->result = DID_BAD_TARGET << 16 | status;
2422 }
2423 }
2424
2425 // print a debug message for all failed commands
2426 if (status) {
2427 megaraid_mbox_display_scb(adapter, scb);
2428 }
2429
2430 // Free our internal resources and call the mid-layer callback
2431 // routine
2432 megaraid_mbox_sync_scb(adapter, scb);
2433
2434 // remove from local clist
2435 list_del_init(&scb->list);
2436
2437 // put back in free list
2438 megaraid_dealloc_scb(adapter, scb);
2439
2440 // send the scsi packet back to kernel
2441 scp->scsi_done(scp);
2442 }
2443
2444 return;
2445 }
2446
2447
2448 /**
2449 * megaraid_abort_handler - abort the scsi command
2450 * @scp : command to be aborted
2451 *
2452 * Abort a previous SCSI request. Only commands on the pending list can be
2453 * aborted. All the commands issued to the F/W must complete.
2454 **/
2455 static int
2456 megaraid_abort_handler(struct scsi_cmnd *scp)
2457 {
2458 adapter_t *adapter;
2459 mraid_device_t *raid_dev;
2460 scb_t *scb;
2461 scb_t *tmp;
2462 int found;
2463 unsigned long flags;
2464 int i;
2465
2466
2467 adapter = SCP2ADAPTER(scp);
2468 raid_dev = ADAP2RAIDDEV(adapter);
2469
2470 con_log(CL_ANN, (KERN_WARNING
2471 "megaraid: aborting cmd=%x <c=%d t=%d l=%d>\n",
2472 scp->cmnd[0], SCP2CHANNEL(scp),
2473 SCP2TARGET(scp), SCP2LUN(scp)));
2474
2475 // If FW has stopped responding, simply return failure
2476 if (raid_dev->hw_error) {
2477 con_log(CL_ANN, (KERN_NOTICE
2478 "megaraid: hw error, not aborting\n"));
2479 return FAILED;
2480 }
2481
2482 // There might a race here, where the command was completed by the
2483 // firmware and now it is on the completed list. Before we could
2484 // complete the command to the kernel in dpc, the abort came.
2485 // Find out if this is the case to avoid the race.
2486 scb = NULL;
2487 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2488 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2489
2490 if (scb->scp == scp) { // Found command
2491
2492 list_del_init(&scb->list); // from completed list
2493
2494 con_log(CL_ANN, (KERN_WARNING
2495 "megaraid: %d[%d:%d], abort from completed list\n",
2496 scb->sno, scb->dev_channel, scb->dev_target));
2497
2498 scp->result = (DID_ABORT << 16);
2499 scp->scsi_done(scp);
2500
2501 megaraid_dealloc_scb(adapter, scb);
2502
2503 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2504 flags);
2505
2506 return SUCCESS;
2507 }
2508 }
2509 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2510
2511
2512 // Find out if this command is still on the pending list. If it is and
2513 // was never issued, abort and return success. If the command is owned
2514 // by the firmware, we must wait for it to complete by the FW.
2515 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2516 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2517
2518 if (scb->scp == scp) { // Found command
2519
2520 list_del_init(&scb->list); // from pending list
2521
2522 ASSERT(!(scb->state & SCB_ISSUED));
2523
2524 con_log(CL_ANN, (KERN_WARNING
2525 "megaraid abort: [%d:%d], driver owner\n",
2526 scb->dev_channel, scb->dev_target));
2527
2528 scp->result = (DID_ABORT << 16);
2529 scp->scsi_done(scp);
2530
2531 megaraid_dealloc_scb(adapter, scb);
2532
2533 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2534 flags);
2535
2536 return SUCCESS;
2537 }
2538 }
2539 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2540
2541
2542 // Check do we even own this command, in which case this would be
2543 // owned by the firmware. The only way to locate the FW scb is to
2544 // traverse through the list of all SCB, since driver does not
2545 // maintain these SCBs on any list
2546 found = 0;
2547 spin_lock_irq(&adapter->lock);
2548 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2549 scb = adapter->kscb_list + i;
2550
2551 if (scb->scp == scp) {
2552
2553 found = 1;
2554
2555 if (!(scb->state & SCB_ISSUED)) {
2556 con_log(CL_ANN, (KERN_WARNING
2557 "megaraid abort: %d[%d:%d], invalid state\n",
2558 scb->sno, scb->dev_channel, scb->dev_target));
2559 BUG();
2560 }
2561 else {
2562 con_log(CL_ANN, (KERN_WARNING
2563 "megaraid abort: %d[%d:%d], fw owner\n",
2564 scb->sno, scb->dev_channel, scb->dev_target));
2565 }
2566 }
2567 }
2568 spin_unlock_irq(&adapter->lock);
2569
2570 if (!found) {
2571 con_log(CL_ANN, (KERN_WARNING "megaraid abort: do now own\n"));
2572
2573 // FIXME: Should there be a callback for this command?
2574 return SUCCESS;
2575 }
2576
2577 // We cannot actually abort a command owned by firmware, return
2578 // failure and wait for reset. In host reset handler, we will find out
2579 // if the HBA is still live
2580 return FAILED;
2581 }
2582
2583 /**
2584 * megaraid_reset_handler - device reset handler for mailbox based driver
2585 * @scp : reference command
2586 *
2587 * Reset handler for the mailbox based controller. First try to find out if
2588 * the FW is still live, in which case the outstanding commands counter mut go
2589 * down to 0. If that happens, also issue the reservation reset command to
2590 * relinquish (possible) reservations on the logical drives connected to this
2591 * host.
2592 **/
2593 static int
2594 megaraid_reset_handler(struct scsi_cmnd *scp)
2595 {
2596 adapter_t *adapter;
2597 scb_t *scb;
2598 scb_t *tmp;
2599 mraid_device_t *raid_dev;
2600 unsigned long flags;
2601 uint8_t raw_mbox[sizeof(mbox_t)];
2602 int rval;
2603 int recovery_window;
2604 int recovering;
2605 int i;
2606 uioc_t *kioc;
2607
2608 adapter = SCP2ADAPTER(scp);
2609 raid_dev = ADAP2RAIDDEV(adapter);
2610
2611 // return failure if adapter is not responding
2612 if (raid_dev->hw_error) {
2613 con_log(CL_ANN, (KERN_NOTICE
2614 "megaraid: hw error, cannot reset\n"));
2615 return FAILED;
2616 }
2617
2618
2619 // Under exceptional conditions, FW can take up to 3 minutes to
2620 // complete command processing. Wait for additional 2 minutes for the
2621 // pending commands counter to go down to 0. If it doesn't, let the
2622 // controller be marked offline
2623 // Also, reset all the commands currently owned by the driver
2624 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2625 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2626 list_del_init(&scb->list); // from pending list
2627
2628 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2629 con_log(CL_ANN, (KERN_WARNING
2630 "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2631 scb->sno, scb->dev_channel, scb->dev_target));
2632
2633 scb->status = -1;
2634
2635 kioc = (uioc_t *)scb->gp;
2636 kioc->status = -EFAULT;
2637
2638 megaraid_mbox_mm_done(adapter, scb);
2639 } else {
2640 if (scb->scp == scp) { // Found command
2641 con_log(CL_ANN, (KERN_WARNING
2642 "megaraid: %d[%d:%d], reset from pending list\n",
2643 scb->sno, scb->dev_channel, scb->dev_target));
2644 } else {
2645 con_log(CL_ANN, (KERN_WARNING
2646 "megaraid: IO packet with %d[%d:%d] being reset\n",
2647 scb->sno, scb->dev_channel, scb->dev_target));
2648 }
2649
2650 scb->scp->result = (DID_RESET << 16);
2651 scb->scp->scsi_done(scb->scp);
2652
2653 megaraid_dealloc_scb(adapter, scb);
2654 }
2655 }
2656 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2657
2658 if (adapter->outstanding_cmds) {
2659 con_log(CL_ANN, (KERN_NOTICE
2660 "megaraid: %d outstanding commands. Max wait %d sec\n",
2661 adapter->outstanding_cmds,
2662 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
2663 }
2664
2665 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2666
2667 recovering = adapter->outstanding_cmds;
2668
2669 for (i = 0; i < recovery_window; i++) {
2670
2671 megaraid_ack_sequence(adapter);
2672
2673 // print a message once every 5 seconds only
2674 if (!(i % 5)) {
2675 con_log(CL_ANN, (
2676 "megaraid mbox: Wait for %d commands to complete:%d\n",
2677 adapter->outstanding_cmds,
2678 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
2679 }
2680
2681 // bailout if no recovery happened in reset time
2682 if (adapter->outstanding_cmds == 0) {
2683 break;
2684 }
2685
2686 msleep(1000);
2687 }
2688
2689 spin_lock(&adapter->lock);
2690
2691 // If still outstanding commands, bail out
2692 if (adapter->outstanding_cmds) {
2693 con_log(CL_ANN, (KERN_WARNING
2694 "megaraid mbox: critical hardware error!\n"));
2695
2696 raid_dev->hw_error = 1;
2697
2698 rval = FAILED;
2699 goto out;
2700 }
2701 else {
2702 con_log(CL_ANN, (KERN_NOTICE
2703 "megaraid mbox: reset sequence completed successfully\n"));
2704 }
2705
2706
2707 // If the controller supports clustering, reset reservations
2708 if (!adapter->ha) {
2709 rval = SUCCESS;
2710 goto out;
2711 }
2712
2713 // clear reservations if any
2714 raw_mbox[0] = CLUSTER_CMD;
2715 raw_mbox[2] = RESET_RESERVATIONS;
2716
2717 rval = SUCCESS;
2718 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2719 con_log(CL_ANN,
2720 (KERN_INFO "megaraid: reservation reset\n"));
2721 }
2722 else {
2723 rval = FAILED;
2724 con_log(CL_ANN, (KERN_WARNING
2725 "megaraid: reservation reset failed\n"));
2726 }
2727
2728 out:
2729 spin_unlock(&adapter->lock);
2730 return rval;
2731 }
2732
2733 /*
2734 * START: internal commands library
2735 *
2736 * This section of the driver has the common routine used by the driver and
2737 * also has all the FW routines
2738 */
2739
2740 /**
2741 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2742 * @adapter : controller's soft state
2743 * @raw_mbox : the mailbox
2744 *
2745 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2746 * controllers.
2747 */
2748 static int
2749 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2750 {
2751 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2752 mbox64_t *mbox64;
2753 mbox_t *mbox;
2754 uint8_t status;
2755 int i;
2756
2757
2758 mbox64 = raid_dev->mbox64;
2759 mbox = raid_dev->mbox;
2760
2761 /*
2762 * Wait until mailbox is free
2763 */
2764 if (megaraid_busywait_mbox(raid_dev) != 0)
2765 goto blocked_mailbox;
2766
2767 /*
2768 * Copy mailbox data into host structure
2769 */
2770 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2771 mbox->cmdid = 0xFE;
2772 mbox->busy = 1;
2773 mbox->poll = 0;
2774 mbox->ack = 0;
2775 mbox->numstatus = 0xFF;
2776 mbox->status = 0xFF;
2777
2778 wmb();
2779 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2780
2781 // wait for maximum 1 second for status to post. If the status is not
2782 // available within 1 second, assume FW is initializing and wait
2783 // for an extended amount of time
2784 if (mbox->numstatus == 0xFF) { // status not yet available
2785 udelay(25);
2786
2787 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2788 rmb();
2789 msleep(1);
2790 }
2791
2792
2793 if (i == 1000) {
2794 con_log(CL_ANN, (KERN_NOTICE
2795 "megaraid mailbox: wait for FW to boot "));
2796
2797 for (i = 0; (mbox->numstatus == 0xFF) &&
2798 (i < MBOX_RESET_WAIT); i++) {
2799 rmb();
2800 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2801 MBOX_RESET_WAIT - i));
2802 msleep(1000);
2803 }
2804
2805 if (i == MBOX_RESET_WAIT) {
2806
2807 con_log(CL_ANN, (
2808 "\nmegaraid mailbox: status not available\n"));
2809
2810 return -1;
2811 }
2812 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2813 }
2814 }
2815
2816 // wait for maximum 1 second for poll semaphore
2817 if (mbox->poll != 0x77) {
2818 udelay(25);
2819
2820 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2821 rmb();
2822 msleep(1);
2823 }
2824
2825 if (i == 1000) {
2826 con_log(CL_ANN, (KERN_WARNING
2827 "megaraid mailbox: could not get poll semaphore\n"));
2828 return -1;
2829 }
2830 }
2831
2832 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2833 wmb();
2834
2835 // wait for maximum 1 second for acknowledgement
2836 if (RDINDOOR(raid_dev) & 0x2) {
2837 udelay(25);
2838
2839 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2840 rmb();
2841 msleep(1);
2842 }
2843
2844 if (i == 1000) {
2845 con_log(CL_ANN, (KERN_WARNING
2846 "megaraid mailbox: could not acknowledge\n"));
2847 return -1;
2848 }
2849 }
2850 mbox->poll = 0;
2851 mbox->ack = 0x77;
2852
2853 status = mbox->status;
2854
2855 // invalidate the completed command id array. After command
2856 // completion, firmware would write the valid id.
2857 mbox->numstatus = 0xFF;
2858 mbox->status = 0xFF;
2859 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2860 mbox->completed[i] = 0xFF;
2861 }
2862
2863 return status;
2864
2865 blocked_mailbox:
2866
2867 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2868 return -1;
2869 }
2870
2871
2872 /**
2873 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2874 * @adapter : controller's soft state
2875 * @raw_mbox : the mailbox
2876 *
2877 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2878 * controllers. This is a faster version of the synchronous command and
2879 * therefore can be called in interrupt-context as well.
2880 */
2881 static int
2882 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2883 {
2884 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2885 mbox_t *mbox;
2886 long i;
2887
2888
2889 mbox = raid_dev->mbox;
2890
2891 // return immediately if the mailbox is busy
2892 if (mbox->busy) return -1;
2893
2894 // Copy mailbox data into host structure
2895 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2896 mbox->cmdid = 0xFE;
2897 mbox->busy = 1;
2898 mbox->poll = 0;
2899 mbox->ack = 0;
2900 mbox->numstatus = 0xFF;
2901 mbox->status = 0xFF;
2902
2903 wmb();
2904 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2905
2906 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
2907 if (mbox->numstatus != 0xFF) break;
2908 rmb();
2909 udelay(MBOX_SYNC_DELAY_200);
2910 }
2911
2912 if (i == MBOX_SYNC_WAIT_CNT) {
2913 // We may need to re-calibrate the counter
2914 con_log(CL_ANN, (KERN_CRIT
2915 "megaraid: fast sync command timed out\n"));
2916 }
2917
2918 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2919 wmb();
2920
2921 return mbox->status;
2922 }
2923
2924
2925 /**
2926 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
2927 * @raid_dev : RAID device (HBA) soft state
2928 *
2929 * Wait until the controller's mailbox is available to accept more commands.
2930 * Wait for at most 1 second.
2931 */
2932 static int
2933 megaraid_busywait_mbox(mraid_device_t *raid_dev)
2934 {
2935 mbox_t *mbox = raid_dev->mbox;
2936 int i = 0;
2937
2938 if (mbox->busy) {
2939 udelay(25);
2940 for (i = 0; mbox->busy && i < 1000; i++)
2941 msleep(1);
2942 }
2943
2944 if (i < 1000) return 0;
2945 else return -1;
2946 }
2947
2948
2949 /**
2950 * megaraid_mbox_product_info - some static information about the controller
2951 * @adapter : our soft state
2952 *
2953 * Issue commands to the controller to grab some parameters required by our
2954 * caller.
2955 */
2956 static int
2957 megaraid_mbox_product_info(adapter_t *adapter)
2958 {
2959 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2960 mbox_t *mbox;
2961 uint8_t raw_mbox[sizeof(mbox_t)];
2962 mraid_pinfo_t *pinfo;
2963 dma_addr_t pinfo_dma_h;
2964 mraid_inquiry3_t *mraid_inq3;
2965 int i;
2966
2967
2968 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2969 mbox = (mbox_t *)raw_mbox;
2970
2971 /*
2972 * Issue an ENQUIRY3 command to find out certain adapter parameters,
2973 * e.g., max channels, max commands etc.
2974 */
2975 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
2976 &pinfo_dma_h);
2977
2978 if (pinfo == NULL) {
2979 con_log(CL_ANN, (KERN_WARNING
2980 "megaraid: out of memory, %s %d\n", __func__,
2981 __LINE__));
2982
2983 return -1;
2984 }
2985 memset(pinfo, 0, sizeof(mraid_pinfo_t));
2986
2987 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
2988 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
2989
2990 raw_mbox[0] = FC_NEW_CONFIG;
2991 raw_mbox[2] = NC_SUBOP_ENQUIRY3;
2992 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
2993
2994 // Issue the command
2995 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
2996
2997 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
2998
2999 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3000 pinfo, pinfo_dma_h);
3001
3002 return -1;
3003 }
3004
3005 /*
3006 * Collect information about state of each physical drive
3007 * attached to the controller. We will expose all the disks
3008 * which are not part of RAID
3009 */
3010 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3011 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3012 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3013 }
3014
3015 /*
3016 * Get product info for information like number of channels,
3017 * maximum commands supported.
3018 */
3019 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3020 mbox->xferaddr = (uint32_t)pinfo_dma_h;
3021
3022 raw_mbox[0] = FC_NEW_CONFIG;
3023 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3024
3025 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3026
3027 con_log(CL_ANN, (KERN_WARNING
3028 "megaraid: product info failed\n"));
3029
3030 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3031 pinfo, pinfo_dma_h);
3032
3033 return -1;
3034 }
3035
3036 /*
3037 * Setup some parameters for host, as required by our caller
3038 */
3039 adapter->max_channel = pinfo->nchannels;
3040
3041 /*
3042 * we will export all the logical drives on a single channel.
3043 * Add 1 since inquires do not come for inititor ID
3044 */
3045 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1;
3046 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices
3047
3048 /*
3049 * These are the maximum outstanding commands for the scsi-layer
3050 */
3051 adapter->max_cmds = MBOX_MAX_SCSI_CMDS;
3052
3053 memset(adapter->fw_version, 0, VERSION_SIZE);
3054 memset(adapter->bios_version, 0, VERSION_SIZE);
3055
3056 memcpy(adapter->fw_version, pinfo->fw_version, 4);
3057 adapter->fw_version[4] = 0;
3058
3059 memcpy(adapter->bios_version, pinfo->bios_version, 4);
3060 adapter->bios_version[4] = 0;
3061
3062 con_log(CL_ANN, (KERN_NOTICE
3063 "megaraid: fw version:[%s] bios version:[%s]\n",
3064 adapter->fw_version, adapter->bios_version));
3065
3066 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3067 pinfo_dma_h);
3068
3069 return 0;
3070 }
3071
3072
3073
3074 /**
3075 * megaraid_mbox_extended_cdb - check for support for extended CDBs
3076 * @adapter : soft state for the controller
3077 *
3078 * This routine check whether the controller in question supports extended
3079 * ( > 10 bytes ) CDBs.
3080 */
3081 static int
3082 megaraid_mbox_extended_cdb(adapter_t *adapter)
3083 {
3084 mbox_t *mbox;
3085 uint8_t raw_mbox[sizeof(mbox_t)];
3086 int rval;
3087
3088 mbox = (mbox_t *)raw_mbox;
3089
3090 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3091 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3092
3093 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3094
3095 raw_mbox[0] = MAIN_MISC_OPCODE;
3096 raw_mbox[2] = SUPPORT_EXT_CDB;
3097
3098 /*
3099 * Issue the command
3100 */
3101 rval = 0;
3102 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3103 rval = -1;
3104 }
3105
3106 return rval;
3107 }
3108
3109
3110 /**
3111 * megaraid_mbox_support_ha - Do we support clustering
3112 * @adapter : soft state for the controller
3113 * @init_id : ID of the initiator
3114 *
3115 * Determine if the firmware supports clustering and the ID of the initiator.
3116 */
3117 static int
3118 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3119 {
3120 mbox_t *mbox;
3121 uint8_t raw_mbox[sizeof(mbox_t)];
3122 int rval;
3123
3124
3125 mbox = (mbox_t *)raw_mbox;
3126
3127 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3128
3129 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3130
3131 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3132
3133 raw_mbox[0] = GET_TARGET_ID;
3134
3135 // Issue the command
3136 *init_id = 7;
3137 rval = -1;
3138 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3139
3140 *init_id = *(uint8_t *)adapter->ibuf;
3141
3142 con_log(CL_ANN, (KERN_INFO
3143 "megaraid: cluster firmware, initiator ID: %d\n",
3144 *init_id));
3145
3146 rval = 0;
3147 }
3148
3149 return rval;
3150 }
3151
3152
3153 /**
3154 * megaraid_mbox_support_random_del - Do we support random deletion
3155 * @adapter : soft state for the controller
3156 *
3157 * Determine if the firmware supports random deletion.
3158 * Return: 1 is operation supported, 0 otherwise
3159 */
3160 static int
3161 megaraid_mbox_support_random_del(adapter_t *adapter)
3162 {
3163 mbox_t *mbox;
3164 uint8_t raw_mbox[sizeof(mbox_t)];
3165 int rval;
3166
3167 /*
3168 * Newer firmware on Dell CERC expect a different
3169 * random deletion handling, so disable it.
3170 */
3171 if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI &&
3172 adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 &&
3173 adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
3174 adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH &&
3175 (adapter->fw_version[0] > '6' ||
3176 (adapter->fw_version[0] == '6' &&
3177 adapter->fw_version[2] > '6') ||
3178 (adapter->fw_version[0] == '6'
3179 && adapter->fw_version[2] == '6'
3180 && adapter->fw_version[3] > '1'))) {
3181 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n"));
3182 return 0;
3183 }
3184
3185 mbox = (mbox_t *)raw_mbox;
3186
3187 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3188
3189 raw_mbox[0] = FC_DEL_LOGDRV;
3190 raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3191
3192 // Issue the command
3193 rval = 0;
3194 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3195
3196 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3197
3198 rval = 1;
3199 }
3200
3201 return rval;
3202 }
3203
3204
3205 /**
3206 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3207 * @adapter : soft state for the controller
3208 *
3209 * Find out the maximum number of scatter-gather elements supported by the
3210 * firmware.
3211 */
3212 static int
3213 megaraid_mbox_get_max_sg(adapter_t *adapter)
3214 {
3215 mbox_t *mbox;
3216 uint8_t raw_mbox[sizeof(mbox_t)];
3217 int nsg;
3218
3219
3220 mbox = (mbox_t *)raw_mbox;
3221
3222 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3223
3224 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3225
3226 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3227
3228 raw_mbox[0] = MAIN_MISC_OPCODE;
3229 raw_mbox[2] = GET_MAX_SG_SUPPORT;
3230
3231 // Issue the command
3232 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3233 nsg = *(uint8_t *)adapter->ibuf;
3234 }
3235 else {
3236 nsg = MBOX_DEFAULT_SG_SIZE;
3237 }
3238
3239 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3240
3241 return nsg;
3242 }
3243
3244
3245 /**
3246 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3247 * @adapter : soft state for the controller
3248 *
3249 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3250 * can be exported as regular SCSI channels.
3251 */
3252 static void
3253 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3254 {
3255 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3256 mbox_t *mbox;
3257 uint8_t raw_mbox[sizeof(mbox_t)];
3258
3259
3260 mbox = (mbox_t *)raw_mbox;
3261
3262 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3263
3264 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3265
3266 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3267
3268 raw_mbox[0] = CHNL_CLASS;
3269 raw_mbox[2] = GET_CHNL_CLASS;
3270
3271 // Issue the command. If the command fails, all channels are RAID
3272 // channels
3273 raid_dev->channel_class = 0xFF;
3274 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3275 raid_dev->channel_class = *(uint8_t *)adapter->ibuf;
3276 }
3277
3278 return;
3279 }
3280
3281
3282 /**
3283 * megaraid_mbox_flush_cache - flush adapter and disks cache
3284 * @adapter : soft state for the controller
3285 *
3286 * Flush adapter cache followed by disks cache.
3287 */
3288 static void
3289 megaraid_mbox_flush_cache(adapter_t *adapter)
3290 {
3291 mbox_t *mbox;
3292 uint8_t raw_mbox[sizeof(mbox_t)];
3293
3294
3295 mbox = (mbox_t *)raw_mbox;
3296
3297 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3298
3299 raw_mbox[0] = FLUSH_ADAPTER;
3300
3301 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3302 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3303 }
3304
3305 raw_mbox[0] = FLUSH_SYSTEM;
3306
3307 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3308 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3309 }
3310
3311 return;
3312 }
3313
3314
3315 /**
3316 * megaraid_mbox_fire_sync_cmd - fire the sync cmd
3317 * @adapter : soft state for the controller
3318 *
3319 * Clears the pending cmds in FW and reinits its RAID structs.
3320 */
3321 static int
3322 megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3323 {
3324 mbox_t *mbox;
3325 uint8_t raw_mbox[sizeof(mbox_t)];
3326 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3327 mbox64_t *mbox64;
3328 int status = 0;
3329 int i;
3330 uint32_t dword;
3331
3332 mbox = (mbox_t *)raw_mbox;
3333
3334 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3335
3336 raw_mbox[0] = 0xFF;
3337
3338 mbox64 = raid_dev->mbox64;
3339 mbox = raid_dev->mbox;
3340
3341 /* Wait until mailbox is free */
3342 if (megaraid_busywait_mbox(raid_dev) != 0) {
3343 status = 1;
3344 goto blocked_mailbox;
3345 }
3346
3347 /* Copy mailbox data into host structure */
3348 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3349 mbox->cmdid = 0xFE;
3350 mbox->busy = 1;
3351 mbox->poll = 0;
3352 mbox->ack = 0;
3353 mbox->numstatus = 0;
3354 mbox->status = 0;
3355
3356 wmb();
3357 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3358
3359 /* Wait for maximum 1 min for status to post.
3360 * If the Firmware SUPPORTS the ABOVE COMMAND,
3361 * mbox->cmd will be set to 0
3362 * else
3363 * the firmware will reject the command with
3364 * mbox->numstatus set to 1
3365 */
3366
3367 i = 0;
3368 status = 0;
3369 while (!mbox->numstatus && mbox->cmd == 0xFF) {
3370 rmb();
3371 msleep(1);
3372 i++;
3373 if (i > 1000 * 60) {
3374 status = 1;
3375 break;
3376 }
3377 }
3378 if (mbox->numstatus == 1)
3379 status = 1; /*cmd not supported*/
3380
3381 /* Check for interrupt line */
3382 dword = RDOUTDOOR(raid_dev);
3383 WROUTDOOR(raid_dev, dword);
3384 WRINDOOR(raid_dev,2);
3385
3386 return status;
3387
3388 blocked_mailbox:
3389 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3390 return status;
3391 }
3392
3393 /**
3394 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3395 * @adapter : controller's soft state
3396 * @scb : SCB to be displayed
3397 * @level : debug level for console print
3398 *
3399 * Diplay information about the given SCB iff the current debug level is
3400 * verbose.
3401 */
3402 static void
3403 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3404 {
3405 mbox_ccb_t *ccb;
3406 struct scsi_cmnd *scp;
3407 mbox_t *mbox;
3408 int level;
3409 int i;
3410
3411
3412 ccb = (mbox_ccb_t *)scb->ccb;
3413 scp = scb->scp;
3414 mbox = ccb->mbox;
3415
3416 level = CL_DLEVEL3;
3417
3418 con_log(level, (KERN_NOTICE
3419 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3420 mbox->cmd, scb->sno));
3421
3422 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3423 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3424 mbox->numsge));
3425
3426 if (!scp) return;
3427
3428 con_log(level, (KERN_NOTICE "scsi cmnd: "));
3429
3430 for (i = 0; i < scp->cmd_len; i++) {
3431 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3432 }
3433
3434 con_log(level, ("\n"));
3435
3436 return;
3437 }
3438
3439
3440 /**
3441 * megaraid_mbox_setup_device_map - manage device ids
3442 * @adapter : Driver's soft state
3443 *
3444 * Manage the device ids to have an appropriate mapping between the kernel
3445 * scsi addresses and megaraid scsi and logical drive addresses. We export
3446 * scsi devices on their actual addresses, whereas the logical drives are
3447 * exported on a virtual scsi channel.
3448 */
3449 static void
3450 megaraid_mbox_setup_device_map(adapter_t *adapter)
3451 {
3452 uint8_t c;
3453 uint8_t t;
3454
3455 /*
3456 * First fill the values on the logical drive channel
3457 */
3458 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3459 adapter->device_ids[adapter->max_channel][t] =
3460 (t < adapter->init_id) ? t : t - 1;
3461
3462 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3463
3464 /*
3465 * Fill the values on the physical devices channels
3466 */
3467 for (c = 0; c < adapter->max_channel; c++)
3468 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3469 adapter->device_ids[c][t] = (c << 8) | t;
3470 }
3471
3472
3473 /*
3474 * END: internal commands library
3475 */
3476
3477 /*
3478 * START: Interface for the common management module
3479 *
3480 * This is the module, which interfaces with the common management module to
3481 * provide support for ioctl and sysfs
3482 */
3483
3484 /**
3485 * megaraid_cmm_register - register with the management module
3486 * @adapter : HBA soft state
3487 *
3488 * Register with the management module, which allows applications to issue
3489 * ioctl calls to the drivers. This interface is used by the management module
3490 * to setup sysfs support as well.
3491 */
3492 static int
3493 megaraid_cmm_register(adapter_t *adapter)
3494 {
3495 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3496 mraid_mmadp_t adp;
3497 scb_t *scb;
3498 mbox_ccb_t *ccb;
3499 int rval;
3500 int i;
3501
3502 // Allocate memory for the base list of scb for management module.
3503 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL);
3504
3505 if (adapter->uscb_list == NULL) {
3506 con_log(CL_ANN, (KERN_WARNING
3507 "megaraid: out of memory, %s %d\n", __func__,
3508 __LINE__));
3509 return -1;
3510 }
3511
3512
3513 // Initialize the synchronization parameters for resources for
3514 // commands for management module
3515 INIT_LIST_HEAD(&adapter->uscb_pool);
3516
3517 spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3518
3519
3520
3521 // link all the packets. Note, CCB for commands, coming from the
3522 // commom management module, mailbox physical address are already
3523 // setup by it. We just need placeholder for that in our local command
3524 // control blocks
3525 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3526
3527 scb = adapter->uscb_list + i;
3528 ccb = raid_dev->uccb_list + i;
3529
3530 scb->ccb = (caddr_t)ccb;
3531 ccb->mbox64 = raid_dev->umbox64 + i;
3532 ccb->mbox = &ccb->mbox64->mbox32;
3533 ccb->raw_mbox = (uint8_t *)ccb->mbox;
3534
3535 scb->gp = 0;
3536
3537 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3538 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3539 scb->sno = i + MBOX_MAX_SCSI_CMDS;
3540
3541 scb->scp = NULL;
3542 scb->state = SCB_FREE;
3543 scb->dma_direction = PCI_DMA_NONE;
3544 scb->dma_type = MRAID_DMA_NONE;
3545 scb->dev_channel = -1;
3546 scb->dev_target = -1;
3547
3548 // put scb in the free pool
3549 list_add_tail(&scb->list, &adapter->uscb_pool);
3550 }
3551
3552 adp.unique_id = adapter->unique_id;
3553 adp.drvr_type = DRVRTYPE_MBOX;
3554 adp.drvr_data = (unsigned long)adapter;
3555 adp.pdev = adapter->pdev;
3556 adp.issue_uioc = megaraid_mbox_mm_handler;
3557 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
3558 adp.max_kioc = MBOX_MAX_USER_CMDS;
3559
3560 if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3561
3562 con_log(CL_ANN, (KERN_WARNING
3563 "megaraid mbox: did not register with CMM\n"));
3564
3565 kfree(adapter->uscb_list);
3566 }
3567
3568 return rval;
3569 }
3570
3571
3572 /**
3573 * megaraid_cmm_unregister - un-register with the management module
3574 * @adapter : HBA soft state
3575 *
3576 * Un-register with the management module.
3577 * FIXME: mgmt module must return failure for unregister if it has pending
3578 * commands in LLD.
3579 */
3580 static int
3581 megaraid_cmm_unregister(adapter_t *adapter)
3582 {
3583 kfree(adapter->uscb_list);
3584 mraid_mm_unregister_adp(adapter->unique_id);
3585 return 0;
3586 }
3587
3588
3589 /**
3590 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3591 * @drvr_data : LLD specific data
3592 * @kioc : CMM interface packet
3593 * @action : command action
3594 *
3595 * This routine is invoked whenever the Common Management Module (CMM) has a
3596 * command for us. The 'action' parameter specifies if this is a new command
3597 * or otherwise.
3598 */
3599 static int
3600 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3601 {
3602 adapter_t *adapter;
3603
3604 if (action != IOCTL_ISSUE) {
3605 con_log(CL_ANN, (KERN_WARNING
3606 "megaraid: unsupported management action:%#2x\n",
3607 action));
3608 return (-ENOTSUPP);
3609 }
3610
3611 adapter = (adapter_t *)drvr_data;
3612
3613 // make sure this adapter is not being detached right now.
3614 if (atomic_read(&adapter->being_detached)) {
3615 con_log(CL_ANN, (KERN_WARNING
3616 "megaraid: reject management request, detaching\n"));
3617 return (-ENODEV);
3618 }
3619
3620 switch (kioc->opcode) {
3621
3622 case GET_ADAP_INFO:
3623
3624 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *)
3625 (unsigned long)kioc->buf_vaddr);
3626
3627 kioc->done(kioc);
3628
3629 return kioc->status;
3630
3631 case MBOX_CMD:
3632
3633 return megaraid_mbox_mm_command(adapter, kioc);
3634
3635 default:
3636 kioc->status = (-EINVAL);
3637 kioc->done(kioc);
3638 return (-EINVAL);
3639 }
3640
3641 return 0; // not reached
3642 }
3643
3644 /**
3645 * megaraid_mbox_mm_command - issues commands routed through CMM
3646 * @adapter : HBA soft state
3647 * @kioc : management command packet
3648 *
3649 * Issues commands, which are routed through the management module.
3650 */
3651 static int
3652 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3653 {
3654 struct list_head *head = &adapter->uscb_pool;
3655 mbox64_t *mbox64;
3656 uint8_t *raw_mbox;
3657 scb_t *scb;
3658 mbox_ccb_t *ccb;
3659 unsigned long flags;
3660
3661 // detach one scb from free pool
3662 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3663
3664 if (list_empty(head)) { // should never happen because of CMM
3665
3666 con_log(CL_ANN, (KERN_WARNING
3667 "megaraid mbox: bug in cmm handler, lost resources\n"));
3668
3669 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3670
3671 return (-EINVAL);
3672 }
3673
3674 scb = list_entry(head->next, scb_t, list);
3675 list_del_init(&scb->list);
3676
3677 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3678
3679 scb->state = SCB_ACTIVE;
3680 scb->dma_type = MRAID_DMA_NONE;
3681 scb->dma_direction = PCI_DMA_NONE;
3682
3683 ccb = (mbox_ccb_t *)scb->ccb;
3684 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3685 raw_mbox = (uint8_t *)&mbox64->mbox32;
3686
3687 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3688
3689 scb->gp = (unsigned long)kioc;
3690
3691 /*
3692 * If it is a logdrv random delete operation, we have to wait till
3693 * there are no outstanding cmds at the fw and then issue it directly
3694 */
3695 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3696
3697 if (wait_till_fw_empty(adapter)) {
3698 con_log(CL_ANN, (KERN_NOTICE
3699 "megaraid mbox: LD delete, timed out\n"));
3700
3701 kioc->status = -ETIME;
3702
3703 scb->status = -1;
3704
3705 megaraid_mbox_mm_done(adapter, scb);
3706
3707 return (-ETIME);
3708 }
3709
3710 INIT_LIST_HEAD(&scb->list);
3711
3712 scb->state = SCB_ISSUED;
3713 if (mbox_post_cmd(adapter, scb) != 0) {
3714
3715 con_log(CL_ANN, (KERN_NOTICE
3716 "megaraid mbox: LD delete, mailbox busy\n"));
3717
3718 kioc->status = -EBUSY;
3719
3720 scb->status = -1;
3721
3722 megaraid_mbox_mm_done(adapter, scb);
3723
3724 return (-EBUSY);
3725 }
3726
3727 return 0;
3728 }
3729
3730 // put the command on the pending list and execute
3731 megaraid_mbox_runpendq(adapter, scb);
3732
3733 return 0;
3734 }
3735
3736
3737 static int
3738 wait_till_fw_empty(adapter_t *adapter)
3739 {
3740 unsigned long flags = 0;
3741 int i;
3742
3743
3744 /*
3745 * Set the quiescent flag to stop issuing cmds to FW.
3746 */
3747 spin_lock_irqsave(&adapter->lock, flags);
3748 adapter->quiescent++;
3749 spin_unlock_irqrestore(&adapter->lock, flags);
3750
3751 /*
3752 * Wait till there are no more cmds outstanding at FW. Try for at most
3753 * 60 seconds
3754 */
3755 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3756 con_log(CL_DLEVEL1, (KERN_INFO
3757 "megaraid: FW has %d pending commands\n",
3758 adapter->outstanding_cmds));
3759
3760 msleep(1000);
3761 }
3762
3763 return adapter->outstanding_cmds;
3764 }
3765
3766
3767 /**
3768 * megaraid_mbox_mm_done - callback for CMM commands
3769 * @adapter : HBA soft state
3770 * @scb : completed command
3771 *
3772 * Callback routine for internal commands originated from the management
3773 * module.
3774 */
3775 static void
3776 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3777 {
3778 uioc_t *kioc;
3779 mbox64_t *mbox64;
3780 uint8_t *raw_mbox;
3781 unsigned long flags;
3782
3783 kioc = (uioc_t *)scb->gp;
3784 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3785 mbox64->mbox32.status = scb->status;
3786 raw_mbox = (uint8_t *)&mbox64->mbox32;
3787
3788
3789 // put scb in the free pool
3790 scb->state = SCB_FREE;
3791 scb->scp = NULL;
3792
3793 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3794
3795 list_add(&scb->list, &adapter->uscb_pool);
3796
3797 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3798
3799 // if a delete logical drive operation succeeded, restart the
3800 // controller
3801 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3802
3803 adapter->quiescent--;
3804
3805 megaraid_mbox_runpendq(adapter, NULL);
3806 }
3807
3808 kioc->done(kioc);
3809
3810 return;
3811 }
3812
3813
3814 /**
3815 * gather_hbainfo - HBA characteristics for the applications
3816 * @adapter : HBA soft state
3817 * @hinfo : pointer to the caller's host info strucuture
3818 */
3819 static int
3820 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3821 {
3822 uint8_t dmajor;
3823
3824 dmajor = megaraid_mbox_version[0];
3825
3826 hinfo->pci_vendor_id = adapter->pdev->vendor;
3827 hinfo->pci_device_id = adapter->pdev->device;
3828 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3829 hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3830
3831 hinfo->pci_bus = adapter->pdev->bus->number;
3832 hinfo->pci_dev_fn = adapter->pdev->devfn;
3833 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn);
3834 hinfo->irq = adapter->host->irq;
3835 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport;
3836
3837 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3838 hinfo->host_no = adapter->host->host_no;
3839
3840 return 0;
3841 }
3842
3843 /*
3844 * END: Interface for the common management module
3845 */
3846
3847
3848
3849 /**
3850 * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3851 * @adapter : controller's soft state
3852 *
3853 * Allocate packets required to issue FW calls whenever the sysfs attributes
3854 * are read. These attributes would require up-to-date information from the
3855 * FW. Also set up resources for mutual exclusion to share these resources and
3856 * the wait queue.
3857 *
3858 * Return 0 on success.
3859 * Return -ERROR_CODE on failure.
3860 */
3861 static int
3862 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3863 {
3864 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3865 int rval = 0;
3866
3867 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3868
3869 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3870
3871 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3872 PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3873
3874 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3875 !raid_dev->sysfs_buffer) {
3876
3877 con_log(CL_ANN, (KERN_WARNING
3878 "megaraid: out of memory, %s %d\n", __func__,
3879 __LINE__));
3880
3881 rval = -ENOMEM;
3882
3883 megaraid_sysfs_free_resources(adapter);
3884 }
3885
3886 mutex_init(&raid_dev->sysfs_mtx);
3887
3888 init_waitqueue_head(&raid_dev->sysfs_wait_q);
3889
3890 return rval;
3891 }
3892
3893
3894 /**
3895 * megaraid_sysfs_free_resources - free sysfs related resources
3896 * @adapter : controller's soft state
3897 *
3898 * Free packets allocated for sysfs FW commands
3899 */
3900 static void
3901 megaraid_sysfs_free_resources(adapter_t *adapter)
3902 {
3903 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3904
3905 kfree(raid_dev->sysfs_uioc);
3906 kfree(raid_dev->sysfs_mbox64);
3907
3908 if (raid_dev->sysfs_buffer) {
3909 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3910 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3911 }
3912 }
3913
3914
3915 /**
3916 * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3917 * @uioc : completed packet
3918 *
3919 * Callback routine called in the ISR/tasklet context for get ldmap call
3920 */
3921 static void
3922 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3923 {
3924 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3925 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3926
3927 uioc->status = 0;
3928
3929 wake_up(&raid_dev->sysfs_wait_q);
3930 }
3931
3932
3933 /**
3934 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3935 * @data : timed out packet
3936 *
3937 * Timeout routine to recover and return to application, in case the adapter
3938 * has stopped responding. A timeout of 60 seconds for this command seems like
3939 * a good value.
3940 */
3941 static void
3942 megaraid_sysfs_get_ldmap_timeout(unsigned long data)
3943 {
3944 uioc_t *uioc = (uioc_t *)data;
3945 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3946 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3947
3948 uioc->status = -ETIME;
3949
3950 wake_up(&raid_dev->sysfs_wait_q);
3951 }
3952
3953
3954 /**
3955 * megaraid_sysfs_get_ldmap - get update logical drive map
3956 * @adapter : controller's soft state
3957 *
3958 * This routine will be called whenever user reads the logical drive
3959 * attributes, go get the current logical drive mapping table from the
3960 * firmware. We use the management API's to issue commands to the controller.
3961 *
3962 * NOTE: The commands issuance functionality is not generalized and
3963 * implemented in context of "get ld map" command only. If required, the
3964 * command issuance logical can be trivially pulled out and implemented as a
3965 * standalone library. For now, this should suffice since there is no other
3966 * user of this interface.
3967 *
3968 * Return 0 on success.
3969 * Return -1 on failure.
3970 */
3971 static int
3972 megaraid_sysfs_get_ldmap(adapter_t *adapter)
3973 {
3974 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3975 uioc_t *uioc;
3976 mbox64_t *mbox64;
3977 mbox_t *mbox;
3978 char *raw_mbox;
3979 struct timer_list sysfs_timer;
3980 struct timer_list *timerp;
3981 caddr_t ldmap;
3982 int rval = 0;
3983
3984 /*
3985 * Allow only one read at a time to go through the sysfs attributes
3986 */
3987 mutex_lock(&raid_dev->sysfs_mtx);
3988
3989 uioc = raid_dev->sysfs_uioc;
3990 mbox64 = raid_dev->sysfs_mbox64;
3991 ldmap = raid_dev->sysfs_buffer;
3992
3993 memset(uioc, 0, sizeof(uioc_t));
3994 memset(mbox64, 0, sizeof(mbox64_t));
3995 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
3996
3997 mbox = &mbox64->mbox32;
3998 raw_mbox = (char *)mbox;
3999 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64;
4000 uioc->buf_vaddr = (caddr_t)adapter;
4001 uioc->status = -ENODATA;
4002 uioc->done = megaraid_sysfs_get_ldmap_done;
4003
4004 /*
4005 * Prepare the mailbox packet to get the current logical drive mapping
4006 * table
4007 */
4008 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
4009
4010 raw_mbox[0] = FC_DEL_LOGDRV;
4011 raw_mbox[2] = OP_GET_LDID_MAP;
4012
4013 /*
4014 * Setup a timer to recover from a non-responding controller
4015 */
4016 timerp = &sysfs_timer;
4017 init_timer(timerp);
4018
4019 timerp->function = megaraid_sysfs_get_ldmap_timeout;
4020 timerp->data = (unsigned long)uioc;
4021 timerp->expires = jiffies + 60 * HZ;
4022
4023 add_timer(timerp);
4024
4025 /*
4026 * Send the command to the firmware
4027 */
4028 rval = megaraid_mbox_mm_command(adapter, uioc);
4029
4030 if (rval == 0) { // command successfully issued
4031 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4032
4033 /*
4034 * Check if the command timed out
4035 */
4036 if (uioc->status == -ETIME) {
4037 con_log(CL_ANN, (KERN_NOTICE
4038 "megaraid: sysfs get ld map timed out\n"));
4039
4040 rval = -ETIME;
4041 }
4042 else {
4043 rval = mbox->status;
4044 }
4045
4046 if (rval == 0) {
4047 memcpy(raid_dev->curr_ldmap, ldmap,
4048 sizeof(raid_dev->curr_ldmap));
4049 }
4050 else {
4051 con_log(CL_ANN, (KERN_NOTICE
4052 "megaraid: get ld map failed with %x\n", rval));
4053 }
4054 }
4055 else {
4056 con_log(CL_ANN, (KERN_NOTICE
4057 "megaraid: could not issue ldmap command:%x\n", rval));
4058 }
4059
4060
4061 del_timer_sync(timerp);
4062
4063 mutex_unlock(&raid_dev->sysfs_mtx);
4064
4065 return rval;
4066 }
4067
4068
4069 /**
4070 * megaraid_sysfs_show_app_hndl - display application handle for this adapter
4071 * @cdev : class device object representation for the host
4072 * @buf : buffer to send data to
4073 *
4074 * Display the handle used by the applications while executing management
4075 * tasks on the adapter. We invoke a management module API to get the adapter
4076 * handle, since we do not interface with applications directly.
4077 */
4078 static ssize_t
4079 megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr,
4080 char *buf)
4081 {
4082 struct Scsi_Host *shost = class_to_shost(dev);
4083 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4084 uint32_t app_hndl;
4085
4086 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4087
4088 return snprintf(buf, 8, "%u\n", app_hndl);
4089 }
4090
4091
4092 /**
4093 * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4094 * @dev : device object representation for the scsi device
4095 * @attr : device attribute to show
4096 * @buf : buffer to send data to
4097 *
4098 * Display the logical drive number for the device in question, if it a valid
4099 * logical drive. For physical devices, "-1" is returned.
4100 *
4101 * The logical drive number is displayed in following format:
4102 *
4103 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4104 *
4105 * <int> <int> <int> <int>
4106 */
4107 static ssize_t
4108 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
4109 {
4110 struct scsi_device *sdev = to_scsi_device(dev);
4111 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4112 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4113 int scsi_id = -1;
4114 int logical_drv = -1;
4115 int ldid_map = -1;
4116 uint32_t app_hndl = 0;
4117 int mapped_sdev_id;
4118 int rval;
4119 int i;
4120
4121 if (raid_dev->random_del_supported &&
4122 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4123
4124 rval = megaraid_sysfs_get_ldmap(adapter);
4125 if (rval == 0) {
4126
4127 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4128
4129 mapped_sdev_id = sdev->id;
4130
4131 if (sdev->id > adapter->init_id) {
4132 mapped_sdev_id -= 1;
4133 }
4134
4135 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4136
4137 scsi_id = sdev->id;
4138
4139 logical_drv = i;
4140
4141 ldid_map = raid_dev->curr_ldmap[i];
4142
4143 app_hndl = mraid_mm_adapter_app_handle(
4144 adapter->unique_id);
4145
4146 break;
4147 }
4148 }
4149 }
4150 else {
4151 con_log(CL_ANN, (KERN_NOTICE
4152 "megaraid: sysfs get ld map failed: %x\n",
4153 rval));
4154 }
4155 }
4156
4157 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4158 ldid_map, app_hndl);
4159 }
4160
4161
4162 /*
4163 * END: Mailbox Low Level Driver
4164 */
4165 module_init(megaraid_init);
4166 module_exit(megaraid_exit);
4167
4168 /* vim: set ts=8 sw=8 tw=78 ai si: */
Linux with added FPC-III support