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Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck...
[mirror_ubuntu-artful-kernel.git] / drivers / scsi / megaraid / megaraid_mbox.c
1 /*
2 *
3 * Linux MegaRAID device driver
4 *
5 * Copyright (c) 2003-2004 LSI Logic Corporation.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 *
12 * FILE : megaraid_mbox.c
13 * Version : v2.20.5.1 (Nov 16 2006)
14 *
15 * Authors:
16 * Atul Mukker <Atul.Mukker@lsi.com>
17 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com>
18 * Manoj Jose <Manoj.Jose@lsi.com>
19 * Seokmann Ju
20 *
21 * List of supported controllers
22 *
23 * OEM Product Name VID DID SSVID SSID
24 * --- ------------ --- --- ---- ----
25 * Dell PERC3/QC 101E 1960 1028 0471
26 * Dell PERC3/DC 101E 1960 1028 0493
27 * Dell PERC3/SC 101E 1960 1028 0475
28 * Dell PERC3/Di 1028 1960 1028 0123
29 * Dell PERC4/SC 1000 1960 1028 0520
30 * Dell PERC4/DC 1000 1960 1028 0518
31 * Dell PERC4/QC 1000 0407 1028 0531
32 * Dell PERC4/Di 1028 000F 1028 014A
33 * Dell PERC 4e/Si 1028 0013 1028 016c
34 * Dell PERC 4e/Di 1028 0013 1028 016d
35 * Dell PERC 4e/Di 1028 0013 1028 016e
36 * Dell PERC 4e/Di 1028 0013 1028 016f
37 * Dell PERC 4e/Di 1028 0013 1028 0170
38 * Dell PERC 4e/DC 1000 0408 1028 0002
39 * Dell PERC 4e/SC 1000 0408 1028 0001
40 *
41 *
42 * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520
43 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520
44 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518
45 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530
46 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532
47 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531
48 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001
49 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002
50 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523
51 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523
52 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004
53 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008
54 *
55 * INTEL RAID Controller SRCU42X 1000 0407 8086 0532
56 * INTEL RAID Controller SRCS16 1000 1960 8086 0523
57 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002
58 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530
59 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008
60 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431
61 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499
62 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520
63 *
64 * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065
65 *
66 * ACER MegaRAID ROMB-2E 1000 0408 1025 004D
67 *
68 * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287
69 *
70 * For history of changes, see Documentation/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_zalloc_consistent(adapter->pdev,
1002 sizeof(mbox64_t),
1003 &raid_dev->una_mbox64_dma);
1004
1005 if (!raid_dev->una_mbox64) {
1006 con_log(CL_ANN, (KERN_WARNING
1007 "megaraid: out of memory, %s %d\n", __func__,
1008 __LINE__));
1009 return -1;
1010 }
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_zalloc_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
1040 // Allocate memory for our SCSI Command Blocks and their associated
1041 // memory
1042
1043 /*
1044 * Allocate memory for the base list of scb. Later allocate memory for
1045 * CCBs and embedded components of each CCB and point the pointers in
1046 * scb to the allocated components
1047 * NOTE: The code to allocate SCB will be duplicated in all the LLD
1048 * since the calling routine does not yet know the number of available
1049 * commands.
1050 */
1051 adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL);
1052
1053 if (adapter->kscb_list == NULL) {
1054 con_log(CL_ANN, (KERN_WARNING
1055 "megaraid: out of memory, %s %d\n", __func__,
1056 __LINE__));
1057 goto out_free_ibuf;
1058 }
1059
1060 // memory allocation for our command packets
1061 if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1062 con_log(CL_ANN, (KERN_WARNING
1063 "megaraid: out of memory, %s %d\n", __func__,
1064 __LINE__));
1065 goto out_free_scb_list;
1066 }
1067
1068 // Adjust the scb pointers and link in the free pool
1069 epthru_pci_blk = raid_dev->epthru_pool;
1070 sg_pci_blk = raid_dev->sg_pool;
1071 mbox_pci_blk = raid_dev->mbox_pool;
1072
1073 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1074 scb = adapter->kscb_list + i;
1075 ccb = raid_dev->ccb_list + i;
1076
1077 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1078 ccb->raw_mbox = (uint8_t *)ccb->mbox;
1079 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1080 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1081
1082 // make sure the mailbox is aligned properly
1083 if (ccb->mbox_dma_h & 0x0F) {
1084 con_log(CL_ANN, (KERN_CRIT
1085 "megaraid mbox: not aligned on 16-bytes\n"));
1086
1087 goto out_teardown_dma_pools;
1088 }
1089
1090 ccb->epthru = (mraid_epassthru_t *)
1091 epthru_pci_blk[i].vaddr;
1092 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr;
1093 ccb->pthru = (mraid_passthru_t *)ccb->epthru;
1094 ccb->pthru_dma_h = ccb->epthru_dma_h;
1095
1096
1097 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1098 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr;
1099 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64;
1100
1101 scb->ccb = (caddr_t)ccb;
1102 scb->gp = 0;
1103
1104 scb->sno = i; // command index
1105
1106 scb->scp = NULL;
1107 scb->state = SCB_FREE;
1108 scb->dma_direction = PCI_DMA_NONE;
1109 scb->dma_type = MRAID_DMA_NONE;
1110 scb->dev_channel = -1;
1111 scb->dev_target = -1;
1112
1113 // put scb in the free pool
1114 list_add_tail(&scb->list, &adapter->kscb_pool);
1115 }
1116
1117 return 0;
1118
1119 out_teardown_dma_pools:
1120 megaraid_mbox_teardown_dma_pools(adapter);
1121 out_free_scb_list:
1122 kfree(adapter->kscb_list);
1123 out_free_ibuf:
1124 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1125 adapter->ibuf_dma_h);
1126 out_free_common_mbox:
1127 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1128 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1129
1130 return -1;
1131 }
1132
1133
1134 /**
1135 * megaraid_free_cmd_packets - free memory
1136 * @adapter : soft state of the raid controller
1137 *
1138 * Release memory resources allocated for commands.
1139 */
1140 static void
1141 megaraid_free_cmd_packets(adapter_t *adapter)
1142 {
1143 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1144
1145 megaraid_mbox_teardown_dma_pools(adapter);
1146
1147 kfree(adapter->kscb_list);
1148
1149 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1150 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1151
1152 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1153 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1154 return;
1155 }
1156
1157
1158 /**
1159 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1160 * @adapter : HBA soft state
1161 *
1162 * Setup the dma pools for mailbox, passthru and extended passthru structures,
1163 * and scatter-gather lists.
1164 */
1165 static int
1166 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1167 {
1168 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1169 struct mraid_pci_blk *epthru_pci_blk;
1170 struct mraid_pci_blk *sg_pci_blk;
1171 struct mraid_pci_blk *mbox_pci_blk;
1172 int i;
1173
1174
1175
1176 // Allocate memory for 16-bytes aligned mailboxes
1177 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1178 adapter->pdev,
1179 sizeof(mbox64_t) + 16,
1180 16, 0);
1181
1182 if (raid_dev->mbox_pool_handle == NULL) {
1183 goto fail_setup_dma_pool;
1184 }
1185
1186 mbox_pci_blk = raid_dev->mbox_pool;
1187 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1188 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1189 raid_dev->mbox_pool_handle,
1190 GFP_KERNEL,
1191 &mbox_pci_blk[i].dma_addr);
1192 if (!mbox_pci_blk[i].vaddr) {
1193 goto fail_setup_dma_pool;
1194 }
1195 }
1196
1197 /*
1198 * Allocate memory for each embedded passthru strucuture pointer
1199 * Request for a 128 bytes aligned structure for each passthru command
1200 * structure
1201 * Since passthru and extended passthru commands are exclusive, they
1202 * share common memory pool. Passthru structures piggyback on memory
1203 * allocted to extended passthru since passthru is smaller of the two
1204 */
1205 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1206 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1207
1208 if (raid_dev->epthru_pool_handle == NULL) {
1209 goto fail_setup_dma_pool;
1210 }
1211
1212 epthru_pci_blk = raid_dev->epthru_pool;
1213 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1214 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1215 raid_dev->epthru_pool_handle,
1216 GFP_KERNEL,
1217 &epthru_pci_blk[i].dma_addr);
1218 if (!epthru_pci_blk[i].vaddr) {
1219 goto fail_setup_dma_pool;
1220 }
1221 }
1222
1223
1224 // Allocate memory for each scatter-gather list. Request for 512 bytes
1225 // alignment for each sg list
1226 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1227 adapter->pdev,
1228 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1229 512, 0);
1230
1231 if (raid_dev->sg_pool_handle == NULL) {
1232 goto fail_setup_dma_pool;
1233 }
1234
1235 sg_pci_blk = raid_dev->sg_pool;
1236 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1237 sg_pci_blk[i].vaddr = pci_pool_alloc(
1238 raid_dev->sg_pool_handle,
1239 GFP_KERNEL,
1240 &sg_pci_blk[i].dma_addr);
1241 if (!sg_pci_blk[i].vaddr) {
1242 goto fail_setup_dma_pool;
1243 }
1244 }
1245
1246 return 0;
1247
1248 fail_setup_dma_pool:
1249 megaraid_mbox_teardown_dma_pools(adapter);
1250 return -1;
1251 }
1252
1253
1254 /**
1255 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1256 * @adapter : HBA soft state
1257 *
1258 * Teardown the dma pool for mailbox, passthru and extended passthru
1259 * structures, and scatter-gather lists.
1260 */
1261 static void
1262 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1263 {
1264 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1265 struct mraid_pci_blk *epthru_pci_blk;
1266 struct mraid_pci_blk *sg_pci_blk;
1267 struct mraid_pci_blk *mbox_pci_blk;
1268 int i;
1269
1270
1271 sg_pci_blk = raid_dev->sg_pool;
1272 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1273 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1274 sg_pci_blk[i].dma_addr);
1275 }
1276 if (raid_dev->sg_pool_handle)
1277 pci_pool_destroy(raid_dev->sg_pool_handle);
1278
1279
1280 epthru_pci_blk = raid_dev->epthru_pool;
1281 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1282 pci_pool_free(raid_dev->epthru_pool_handle,
1283 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1284 }
1285 if (raid_dev->epthru_pool_handle)
1286 pci_pool_destroy(raid_dev->epthru_pool_handle);
1287
1288
1289 mbox_pci_blk = raid_dev->mbox_pool;
1290 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1291 pci_pool_free(raid_dev->mbox_pool_handle,
1292 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1293 }
1294 if (raid_dev->mbox_pool_handle)
1295 pci_pool_destroy(raid_dev->mbox_pool_handle);
1296
1297 return;
1298 }
1299
1300
1301 /**
1302 * megaraid_alloc_scb - detach and return a scb from the free list
1303 * @adapter : controller's soft state
1304 * @scp : pointer to the scsi command to be executed
1305 *
1306 * Return the scb from the head of the free list. %NULL if there are none
1307 * available.
1308 */
1309 static scb_t *
1310 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1311 {
1312 struct list_head *head = &adapter->kscb_pool;
1313 scb_t *scb = NULL;
1314 unsigned long flags;
1315
1316 // detach scb from free pool
1317 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1318
1319 if (list_empty(head)) {
1320 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1321 return NULL;
1322 }
1323
1324 scb = list_entry(head->next, scb_t, list);
1325 list_del_init(&scb->list);
1326
1327 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1328
1329 scb->state = SCB_ACTIVE;
1330 scb->scp = scp;
1331 scb->dma_type = MRAID_DMA_NONE;
1332
1333 return scb;
1334 }
1335
1336
1337 /**
1338 * megaraid_dealloc_scb - return the scb to the free pool
1339 * @adapter : controller's soft state
1340 * @scb : scb to be freed
1341 *
1342 * Return the scb back to the free list of scbs. The caller must 'flush' the
1343 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1344 * NOTE NOTE: Make sure the scb is not on any list before calling this
1345 * routine.
1346 */
1347 static inline void
1348 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1349 {
1350 unsigned long flags;
1351
1352 // put scb in the free pool
1353 scb->state = SCB_FREE;
1354 scb->scp = NULL;
1355 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1356
1357 list_add(&scb->list, &adapter->kscb_pool);
1358
1359 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1360
1361 return;
1362 }
1363
1364
1365 /**
1366 * megaraid_mbox_mksgl - make the scatter-gather list
1367 * @adapter : controller's soft state
1368 * @scb : scsi control block
1369 *
1370 * Prepare the scatter-gather list.
1371 */
1372 static int
1373 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1374 {
1375 struct scatterlist *sgl;
1376 mbox_ccb_t *ccb;
1377 struct scsi_cmnd *scp;
1378 int sgcnt;
1379 int i;
1380
1381
1382 scp = scb->scp;
1383 ccb = (mbox_ccb_t *)scb->ccb;
1384
1385 sgcnt = scsi_dma_map(scp);
1386 BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen);
1387
1388 // no mapping required if no data to be transferred
1389 if (!sgcnt)
1390 return 0;
1391
1392 scb->dma_type = MRAID_DMA_WSG;
1393
1394 scsi_for_each_sg(scp, sgl, sgcnt, i) {
1395 ccb->sgl64[i].address = sg_dma_address(sgl);
1396 ccb->sgl64[i].length = sg_dma_len(sgl);
1397 }
1398
1399 // Return count of SG nodes
1400 return sgcnt;
1401 }
1402
1403
1404 /**
1405 * mbox_post_cmd - issue a mailbox command
1406 * @adapter : controller's soft state
1407 * @scb : command to be issued
1408 *
1409 * Post the command to the controller if mailbox is available.
1410 */
1411 static int
1412 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1413 {
1414 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1415 mbox64_t *mbox64;
1416 mbox_t *mbox;
1417 mbox_ccb_t *ccb;
1418 unsigned long flags;
1419 unsigned int i = 0;
1420
1421
1422 ccb = (mbox_ccb_t *)scb->ccb;
1423 mbox = raid_dev->mbox;
1424 mbox64 = raid_dev->mbox64;
1425
1426 /*
1427 * Check for busy mailbox. If it is, return failure - the caller
1428 * should retry later.
1429 */
1430 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1431
1432 if (unlikely(mbox->busy)) {
1433 do {
1434 udelay(1);
1435 i++;
1436 rmb();
1437 } while(mbox->busy && (i < max_mbox_busy_wait));
1438
1439 if (mbox->busy) {
1440
1441 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1442
1443 return -1;
1444 }
1445 }
1446
1447
1448 // Copy this command's mailbox data into "adapter's" mailbox
1449 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1450 mbox->cmdid = scb->sno;
1451
1452 adapter->outstanding_cmds++;
1453
1454 if (scb->dma_direction == PCI_DMA_TODEVICE)
1455 pci_dma_sync_sg_for_device(adapter->pdev,
1456 scsi_sglist(scb->scp),
1457 scsi_sg_count(scb->scp),
1458 PCI_DMA_TODEVICE);
1459
1460 mbox->busy = 1; // Set busy
1461 mbox->poll = 0;
1462 mbox->ack = 0;
1463 wmb();
1464
1465 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1466
1467 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1468
1469 return 0;
1470 }
1471
1472
1473 /**
1474 * megaraid_queue_command - generic queue entry point for all LLDs
1475 * @scp : pointer to the scsi command to be executed
1476 * @done : callback routine to be called after the cmd has be completed
1477 *
1478 * Queue entry point for mailbox based controllers.
1479 */
1480 static int
1481 megaraid_queue_command_lck(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *))
1482 {
1483 adapter_t *adapter;
1484 scb_t *scb;
1485 int if_busy;
1486
1487 adapter = SCP2ADAPTER(scp);
1488 scp->scsi_done = done;
1489 scp->result = 0;
1490
1491 /*
1492 * Allocate and build a SCB request
1493 * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1494 * not allocate scb. We will return non-zero status in that case.
1495 * NOTE: scb can be null even though certain commands completed
1496 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1497 * return 0 in that case, and we would do the callback right away.
1498 */
1499 if_busy = 0;
1500 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1501 if (!scb) { // command already completed
1502 done(scp);
1503 return 0;
1504 }
1505
1506 megaraid_mbox_runpendq(adapter, scb);
1507 return if_busy;
1508 }
1509
1510 static DEF_SCSI_QCMD(megaraid_queue_command)
1511
1512 /**
1513 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
1514 * @adapter : controller's soft state
1515 * @scp : mid-layer scsi command pointer
1516 * @busy : set if request could not be completed because of lack of
1517 * resources
1518 *
1519 * Transform the mid-layer scsi command to megaraid firmware lingua.
1520 * Convert the command issued by mid-layer to format understood by megaraid
1521 * firmware. We also complete certain commands without sending them to firmware.
1522 */
1523 static scb_t *
1524 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1525 {
1526 mraid_device_t *rdev = ADAP2RAIDDEV(adapter);
1527 int channel;
1528 int target;
1529 int islogical;
1530 mbox_ccb_t *ccb;
1531 mraid_passthru_t *pthru;
1532 mbox64_t *mbox64;
1533 mbox_t *mbox;
1534 scb_t *scb;
1535 char skip[] = "skipping";
1536 char scan[] = "scanning";
1537 char *ss;
1538
1539
1540 /*
1541 * Get the appropriate device map for the device this command is
1542 * intended for
1543 */
1544 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1545
1546 /*
1547 * Logical drive commands
1548 */
1549 if (islogical) {
1550 switch (scp->cmnd[0]) {
1551 case TEST_UNIT_READY:
1552 /*
1553 * Do we support clustering and is the support enabled
1554 * If no, return success always
1555 */
1556 if (!adapter->ha) {
1557 scp->result = (DID_OK << 16);
1558 return NULL;
1559 }
1560
1561 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1562 scp->result = (DID_ERROR << 16);
1563 *busy = 1;
1564 return NULL;
1565 }
1566
1567 scb->dma_direction = scp->sc_data_direction;
1568 scb->dev_channel = 0xFF;
1569 scb->dev_target = target;
1570 ccb = (mbox_ccb_t *)scb->ccb;
1571
1572 /*
1573 * The command id will be provided by the command
1574 * issuance routine
1575 */
1576 ccb->raw_mbox[0] = CLUSTER_CMD;
1577 ccb->raw_mbox[2] = RESERVATION_STATUS;
1578 ccb->raw_mbox[3] = target;
1579
1580 return scb;
1581
1582 case MODE_SENSE:
1583 {
1584 struct scatterlist *sgl;
1585 caddr_t vaddr;
1586
1587 sgl = scsi_sglist(scp);
1588 if (sg_page(sgl)) {
1589 vaddr = (caddr_t) sg_virt(&sgl[0]);
1590
1591 memset(vaddr, 0, scp->cmnd[4]);
1592 }
1593 else {
1594 con_log(CL_ANN, (KERN_WARNING
1595 "megaraid mailbox: invalid sg:%d\n",
1596 __LINE__));
1597 }
1598 }
1599 scp->result = (DID_OK << 16);
1600 return NULL;
1601
1602 case INQUIRY:
1603 /*
1604 * Display the channel scan for logical drives
1605 * Do not display scan for a channel if already done.
1606 */
1607 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1608
1609 con_log(CL_ANN, (KERN_INFO
1610 "scsi[%d]: scanning scsi channel %d",
1611 adapter->host->host_no,
1612 SCP2CHANNEL(scp)));
1613
1614 con_log(CL_ANN, (
1615 " [virtual] for logical drives\n"));
1616
1617 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1618 }
1619
1620 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1621 scp->sense_buffer[0] = 0x70;
1622 scp->sense_buffer[2] = ILLEGAL_REQUEST;
1623 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB;
1624 scp->result = CHECK_CONDITION << 1;
1625 return NULL;
1626 }
1627
1628 /* Fall through */
1629
1630 case READ_CAPACITY:
1631 /*
1632 * Do not allow LUN > 0 for logical drives and
1633 * requests for more than 40 logical drives
1634 */
1635 if (SCP2LUN(scp)) {
1636 scp->result = (DID_BAD_TARGET << 16);
1637 return NULL;
1638 }
1639 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1640 scp->result = (DID_BAD_TARGET << 16);
1641 return NULL;
1642 }
1643
1644
1645 /* Allocate a SCB and initialize passthru */
1646 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1647 scp->result = (DID_ERROR << 16);
1648 *busy = 1;
1649 return NULL;
1650 }
1651
1652 ccb = (mbox_ccb_t *)scb->ccb;
1653 scb->dev_channel = 0xFF;
1654 scb->dev_target = target;
1655 pthru = ccb->pthru;
1656 mbox = ccb->mbox;
1657 mbox64 = ccb->mbox64;
1658
1659 pthru->timeout = 0;
1660 pthru->ars = 1;
1661 pthru->reqsenselen = 14;
1662 pthru->islogical = 1;
1663 pthru->logdrv = target;
1664 pthru->cdblen = scp->cmd_len;
1665 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1666
1667 mbox->cmd = MBOXCMD_PASSTHRU64;
1668 scb->dma_direction = scp->sc_data_direction;
1669
1670 pthru->dataxferlen = scsi_bufflen(scp);
1671 pthru->dataxferaddr = ccb->sgl_dma_h;
1672 pthru->numsge = megaraid_mbox_mksgl(adapter,
1673 scb);
1674
1675 mbox->xferaddr = 0xFFFFFFFF;
1676 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h;
1677 mbox64->xferaddr_hi = 0;
1678
1679 return scb;
1680
1681 case READ_6:
1682 case WRITE_6:
1683 case READ_10:
1684 case WRITE_10:
1685 case READ_12:
1686 case WRITE_12:
1687
1688 /*
1689 * Allocate a SCB and initialize mailbox
1690 */
1691 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1692 scp->result = (DID_ERROR << 16);
1693 *busy = 1;
1694 return NULL;
1695 }
1696 ccb = (mbox_ccb_t *)scb->ccb;
1697 scb->dev_channel = 0xFF;
1698 scb->dev_target = target;
1699 mbox = ccb->mbox;
1700 mbox64 = ccb->mbox64;
1701 mbox->logdrv = target;
1702
1703 /*
1704 * A little HACK: 2nd bit is zero for all scsi read
1705 * commands and is set for all scsi write commands
1706 */
1707 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64:
1708 MBOXCMD_LREAD64 ;
1709
1710 /*
1711 * 6-byte READ(0x08) or WRITE(0x0A) cdb
1712 */
1713 if (scp->cmd_len == 6) {
1714 mbox->numsectors = (uint32_t)scp->cmnd[4];
1715 mbox->lba =
1716 ((uint32_t)scp->cmnd[1] << 16) |
1717 ((uint32_t)scp->cmnd[2] << 8) |
1718 (uint32_t)scp->cmnd[3];
1719
1720 mbox->lba &= 0x1FFFFF;
1721 }
1722
1723 /*
1724 * 10-byte READ(0x28) or WRITE(0x2A) cdb
1725 */
1726 else if (scp->cmd_len == 10) {
1727 mbox->numsectors =
1728 (uint32_t)scp->cmnd[8] |
1729 ((uint32_t)scp->cmnd[7] << 8);
1730 mbox->lba =
1731 ((uint32_t)scp->cmnd[2] << 24) |
1732 ((uint32_t)scp->cmnd[3] << 16) |
1733 ((uint32_t)scp->cmnd[4] << 8) |
1734 (uint32_t)scp->cmnd[5];
1735 }
1736
1737 /*
1738 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1739 */
1740 else if (scp->cmd_len == 12) {
1741 mbox->lba =
1742 ((uint32_t)scp->cmnd[2] << 24) |
1743 ((uint32_t)scp->cmnd[3] << 16) |
1744 ((uint32_t)scp->cmnd[4] << 8) |
1745 (uint32_t)scp->cmnd[5];
1746
1747 mbox->numsectors =
1748 ((uint32_t)scp->cmnd[6] << 24) |
1749 ((uint32_t)scp->cmnd[7] << 16) |
1750 ((uint32_t)scp->cmnd[8] << 8) |
1751 (uint32_t)scp->cmnd[9];
1752 }
1753 else {
1754 con_log(CL_ANN, (KERN_WARNING
1755 "megaraid: unsupported CDB length\n"));
1756
1757 megaraid_dealloc_scb(adapter, scb);
1758
1759 scp->result = (DID_ERROR << 16);
1760 return NULL;
1761 }
1762
1763 scb->dma_direction = scp->sc_data_direction;
1764
1765 // Calculate Scatter-Gather info
1766 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h;
1767 mbox->numsge = megaraid_mbox_mksgl(adapter,
1768 scb);
1769 mbox->xferaddr = 0xFFFFFFFF;
1770 mbox64->xferaddr_hi = 0;
1771
1772 return scb;
1773
1774 case RESERVE:
1775 case RELEASE:
1776 /*
1777 * Do we support clustering and is the support enabled
1778 */
1779 if (!adapter->ha) {
1780 scp->result = (DID_BAD_TARGET << 16);
1781 return NULL;
1782 }
1783
1784 /*
1785 * Allocate a SCB and initialize mailbox
1786 */
1787 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1788 scp->result = (DID_ERROR << 16);
1789 *busy = 1;
1790 return NULL;
1791 }
1792
1793 ccb = (mbox_ccb_t *)scb->ccb;
1794 scb->dev_channel = 0xFF;
1795 scb->dev_target = target;
1796 ccb->raw_mbox[0] = CLUSTER_CMD;
1797 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ?
1798 RESERVE_LD : RELEASE_LD;
1799
1800 ccb->raw_mbox[3] = target;
1801 scb->dma_direction = scp->sc_data_direction;
1802
1803 return scb;
1804
1805 default:
1806 scp->result = (DID_BAD_TARGET << 16);
1807 return NULL;
1808 }
1809 }
1810 else { // Passthru device commands
1811
1812 // Do not allow access to target id > 15 or LUN > 7
1813 if (target > 15 || SCP2LUN(scp) > 7) {
1814 scp->result = (DID_BAD_TARGET << 16);
1815 return NULL;
1816 }
1817
1818 // if fast load option was set and scan for last device is
1819 // over, reset the fast_load flag so that during a possible
1820 // next scan, devices can be made available
1821 if (rdev->fast_load && (target == 15) &&
1822 (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1823
1824 con_log(CL_ANN, (KERN_INFO
1825 "megaraid[%d]: physical device scan re-enabled\n",
1826 adapter->host->host_no));
1827 rdev->fast_load = 0;
1828 }
1829
1830 /*
1831 * Display the channel scan for physical devices
1832 */
1833 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1834
1835 ss = rdev->fast_load ? skip : scan;
1836
1837 con_log(CL_ANN, (KERN_INFO
1838 "scsi[%d]: %s scsi channel %d [Phy %d]",
1839 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1840 channel));
1841
1842 con_log(CL_ANN, (
1843 " for non-raid devices\n"));
1844
1845 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1846 }
1847
1848 // disable channel sweep if fast load option given
1849 if (rdev->fast_load) {
1850 scp->result = (DID_BAD_TARGET << 16);
1851 return NULL;
1852 }
1853
1854 // Allocate a SCB and initialize passthru
1855 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1856 scp->result = (DID_ERROR << 16);
1857 *busy = 1;
1858 return NULL;
1859 }
1860
1861 ccb = (mbox_ccb_t *)scb->ccb;
1862 scb->dev_channel = channel;
1863 scb->dev_target = target;
1864 scb->dma_direction = scp->sc_data_direction;
1865 mbox = ccb->mbox;
1866 mbox64 = ccb->mbox64;
1867
1868 // Does this firmware support extended CDBs
1869 if (adapter->max_cdb_sz == 16) {
1870 mbox->cmd = MBOXCMD_EXTPTHRU;
1871
1872 megaraid_mbox_prepare_epthru(adapter, scb, scp);
1873
1874 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h;
1875 mbox64->xferaddr_hi = 0;
1876 mbox->xferaddr = 0xFFFFFFFF;
1877 }
1878 else {
1879 mbox->cmd = MBOXCMD_PASSTHRU64;
1880
1881 megaraid_mbox_prepare_pthru(adapter, scb, scp);
1882
1883 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h;
1884 mbox64->xferaddr_hi = 0;
1885 mbox->xferaddr = 0xFFFFFFFF;
1886 }
1887 return scb;
1888 }
1889
1890 // NOT REACHED
1891 }
1892
1893
1894 /**
1895 * megaraid_mbox_runpendq - execute commands queued in the pending queue
1896 * @adapter : controller's soft state
1897 * @scb_q : SCB to be queued in the pending list
1898 *
1899 * Scan the pending list for commands which are not yet issued and try to
1900 * post to the controller. The SCB can be a null pointer, which would indicate
1901 * no SCB to be queue, just try to execute the ones in the pending list.
1902 *
1903 * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1904 * out from the head of the pending list. If it is successfully issued, the
1905 * next SCB is at the head now.
1906 */
1907 static void
1908 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1909 {
1910 scb_t *scb;
1911 unsigned long flags;
1912
1913 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1914
1915 if (scb_q) {
1916 scb_q->state = SCB_PENDQ;
1917 list_add_tail(&scb_q->list, &adapter->pend_list);
1918 }
1919
1920 // if the adapter in not in quiescent mode, post the commands to FW
1921 if (adapter->quiescent) {
1922 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1923 return;
1924 }
1925
1926 while (!list_empty(&adapter->pend_list)) {
1927
1928 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1929
1930 scb = list_entry(adapter->pend_list.next, scb_t, list);
1931
1932 // remove the scb from the pending list and try to
1933 // issue. If we are unable to issue it, put back in
1934 // the pending list and return
1935
1936 list_del_init(&scb->list);
1937
1938 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1939
1940 // if mailbox was busy, return SCB back to pending
1941 // list. Make sure to add at the head, since that's
1942 // where it would have been removed from
1943
1944 scb->state = SCB_ISSUED;
1945
1946 if (mbox_post_cmd(adapter, scb) != 0) {
1947
1948 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1949
1950 scb->state = SCB_PENDQ;
1951
1952 list_add(&scb->list, &adapter->pend_list);
1953
1954 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1955 flags);
1956
1957 return;
1958 }
1959
1960 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1961 }
1962
1963 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1964
1965
1966 return;
1967 }
1968
1969
1970 /**
1971 * megaraid_mbox_prepare_pthru - prepare a command for physical devices
1972 * @adapter : pointer to controller's soft state
1973 * @scb : scsi control block
1974 * @scp : scsi command from the mid-layer
1975 *
1976 * Prepare a command for the scsi physical devices.
1977 */
1978 static void
1979 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1980 struct scsi_cmnd *scp)
1981 {
1982 mbox_ccb_t *ccb;
1983 mraid_passthru_t *pthru;
1984 uint8_t channel;
1985 uint8_t target;
1986
1987 ccb = (mbox_ccb_t *)scb->ccb;
1988 pthru = ccb->pthru;
1989 channel = scb->dev_channel;
1990 target = scb->dev_target;
1991
1992 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1993 pthru->timeout = 4;
1994 pthru->ars = 1;
1995 pthru->islogical = 0;
1996 pthru->channel = 0;
1997 pthru->target = (channel << 4) | target;
1998 pthru->logdrv = SCP2LUN(scp);
1999 pthru->reqsenselen = 14;
2000 pthru->cdblen = scp->cmd_len;
2001
2002 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2003
2004 if (scsi_bufflen(scp)) {
2005 pthru->dataxferlen = scsi_bufflen(scp);
2006 pthru->dataxferaddr = ccb->sgl_dma_h;
2007 pthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2008 }
2009 else {
2010 pthru->dataxferaddr = 0;
2011 pthru->dataxferlen = 0;
2012 pthru->numsge = 0;
2013 }
2014 return;
2015 }
2016
2017
2018 /**
2019 * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2020 * @adapter : pointer to controller's soft state
2021 * @scb : scsi control block
2022 * @scp : scsi command from the mid-layer
2023 *
2024 * Prepare a command for the scsi physical devices. This routine prepares
2025 * commands for devices which can take extended CDBs (>10 bytes).
2026 */
2027 static void
2028 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2029 struct scsi_cmnd *scp)
2030 {
2031 mbox_ccb_t *ccb;
2032 mraid_epassthru_t *epthru;
2033 uint8_t channel;
2034 uint8_t target;
2035
2036 ccb = (mbox_ccb_t *)scb->ccb;
2037 epthru = ccb->epthru;
2038 channel = scb->dev_channel;
2039 target = scb->dev_target;
2040
2041 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2042 epthru->timeout = 4;
2043 epthru->ars = 1;
2044 epthru->islogical = 0;
2045 epthru->channel = 0;
2046 epthru->target = (channel << 4) | target;
2047 epthru->logdrv = SCP2LUN(scp);
2048 epthru->reqsenselen = 14;
2049 epthru->cdblen = scp->cmd_len;
2050
2051 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2052
2053 if (scsi_bufflen(scp)) {
2054 epthru->dataxferlen = scsi_bufflen(scp);
2055 epthru->dataxferaddr = ccb->sgl_dma_h;
2056 epthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2057 }
2058 else {
2059 epthru->dataxferaddr = 0;
2060 epthru->dataxferlen = 0;
2061 epthru->numsge = 0;
2062 }
2063 return;
2064 }
2065
2066
2067 /**
2068 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2069 * @adapter : controller's soft state
2070 *
2071 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
2072 * completed command and put them on the completed list for later processing.
2073 *
2074 * Returns: 1 if the interrupt is valid, 0 otherwise
2075 */
2076 static int
2077 megaraid_ack_sequence(adapter_t *adapter)
2078 {
2079 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2080 mbox_t *mbox;
2081 scb_t *scb;
2082 uint8_t nstatus;
2083 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS];
2084 struct list_head clist;
2085 int handled;
2086 uint32_t dword;
2087 unsigned long flags;
2088 int i, j;
2089
2090
2091 mbox = raid_dev->mbox;
2092
2093 // move the SCBs from the firmware completed array to our local list
2094 INIT_LIST_HEAD(&clist);
2095
2096 // loop till F/W has more commands for us to complete
2097 handled = 0;
2098 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2099 do {
2100 /*
2101 * Check if a valid interrupt is pending. If found, force the
2102 * interrupt line low.
2103 */
2104 dword = RDOUTDOOR(raid_dev);
2105 if (dword != 0x10001234) break;
2106
2107 handled = 1;
2108
2109 WROUTDOOR(raid_dev, 0x10001234);
2110
2111 nstatus = 0;
2112 // wait for valid numstatus to post
2113 for (i = 0; i < 0xFFFFF; i++) {
2114 if (mbox->numstatus != 0xFF) {
2115 nstatus = mbox->numstatus;
2116 break;
2117 }
2118 rmb();
2119 }
2120 mbox->numstatus = 0xFF;
2121
2122 adapter->outstanding_cmds -= nstatus;
2123
2124 for (i = 0; i < nstatus; i++) {
2125
2126 // wait for valid command index to post
2127 for (j = 0; j < 0xFFFFF; j++) {
2128 if (mbox->completed[i] != 0xFF) break;
2129 rmb();
2130 }
2131 completed[i] = mbox->completed[i];
2132 mbox->completed[i] = 0xFF;
2133
2134 if (completed[i] == 0xFF) {
2135 con_log(CL_ANN, (KERN_CRIT
2136 "megaraid: command posting timed out\n"));
2137
2138 BUG();
2139 continue;
2140 }
2141
2142 // Get SCB associated with this command id
2143 if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2144 // a cmm command
2145 scb = adapter->uscb_list + (completed[i] -
2146 MBOX_MAX_SCSI_CMDS);
2147 }
2148 else {
2149 // an os command
2150 scb = adapter->kscb_list + completed[i];
2151 }
2152
2153 scb->status = mbox->status;
2154 list_add_tail(&scb->list, &clist);
2155 }
2156
2157 // Acknowledge interrupt
2158 WRINDOOR(raid_dev, 0x02);
2159
2160 } while(1);
2161
2162 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2163
2164
2165 // put the completed commands in the completed list. DPC would
2166 // complete these commands later
2167 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2168
2169 list_splice(&clist, &adapter->completed_list);
2170
2171 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2172
2173
2174 // schedule the DPC if there is some work for it
2175 if (handled)
2176 tasklet_schedule(&adapter->dpc_h);
2177
2178 return handled;
2179 }
2180
2181
2182 /**
2183 * megaraid_isr - isr for memory based mailbox based controllers
2184 * @irq : irq
2185 * @devp : pointer to our soft state
2186 *
2187 * Interrupt service routine for memory-mapped mailbox controllers.
2188 */
2189 static irqreturn_t
2190 megaraid_isr(int irq, void *devp)
2191 {
2192 adapter_t *adapter = devp;
2193 int handled;
2194
2195 handled = megaraid_ack_sequence(adapter);
2196
2197 /* Loop through any pending requests */
2198 if (!adapter->quiescent) {
2199 megaraid_mbox_runpendq(adapter, NULL);
2200 }
2201
2202 return IRQ_RETVAL(handled);
2203 }
2204
2205
2206 /**
2207 * megaraid_mbox_sync_scb - sync kernel buffers
2208 * @adapter : controller's soft state
2209 * @scb : pointer to the resource packet
2210 *
2211 * DMA sync if required.
2212 */
2213 static void
2214 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2215 {
2216 mbox_ccb_t *ccb;
2217
2218 ccb = (mbox_ccb_t *)scb->ccb;
2219
2220 if (scb->dma_direction == PCI_DMA_FROMDEVICE)
2221 pci_dma_sync_sg_for_cpu(adapter->pdev,
2222 scsi_sglist(scb->scp),
2223 scsi_sg_count(scb->scp),
2224 PCI_DMA_FROMDEVICE);
2225
2226 scsi_dma_unmap(scb->scp);
2227 return;
2228 }
2229
2230
2231 /**
2232 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2233 * @devp : pointer to HBA soft state
2234 *
2235 * Pick up the commands from the completed list and send back to the owners.
2236 * This is a reentrant function and does not assume any locks are held while
2237 * it is being called.
2238 */
2239 static void
2240 megaraid_mbox_dpc(unsigned long devp)
2241 {
2242 adapter_t *adapter = (adapter_t *)devp;
2243 mraid_device_t *raid_dev;
2244 struct list_head clist;
2245 struct scatterlist *sgl;
2246 scb_t *scb;
2247 scb_t *tmp;
2248 struct scsi_cmnd *scp;
2249 mraid_passthru_t *pthru;
2250 mraid_epassthru_t *epthru;
2251 mbox_ccb_t *ccb;
2252 int islogical;
2253 int pdev_index;
2254 int pdev_state;
2255 mbox_t *mbox;
2256 unsigned long flags;
2257 uint8_t c;
2258 int status;
2259 uioc_t *kioc;
2260
2261
2262 if (!adapter) return;
2263
2264 raid_dev = ADAP2RAIDDEV(adapter);
2265
2266 // move the SCBs from the completed list to our local list
2267 INIT_LIST_HEAD(&clist);
2268
2269 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2270
2271 list_splice_init(&adapter->completed_list, &clist);
2272
2273 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2274
2275
2276 list_for_each_entry_safe(scb, tmp, &clist, list) {
2277
2278 status = scb->status;
2279 scp = scb->scp;
2280 ccb = (mbox_ccb_t *)scb->ccb;
2281 pthru = ccb->pthru;
2282 epthru = ccb->epthru;
2283 mbox = ccb->mbox;
2284
2285 // Make sure f/w has completed a valid command
2286 if (scb->state != SCB_ISSUED) {
2287 con_log(CL_ANN, (KERN_CRIT
2288 "megaraid critical err: invalid command %d:%d:%p\n",
2289 scb->sno, scb->state, scp));
2290 BUG();
2291 continue; // Must never happen!
2292 }
2293
2294 // check for the management command and complete it right away
2295 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2296 scb->state = SCB_FREE;
2297 scb->status = status;
2298
2299 // remove from local clist
2300 list_del_init(&scb->list);
2301
2302 kioc = (uioc_t *)scb->gp;
2303 kioc->status = 0;
2304
2305 megaraid_mbox_mm_done(adapter, scb);
2306
2307 continue;
2308 }
2309
2310 // Was an abort issued for this command earlier
2311 if (scb->state & SCB_ABORT) {
2312 con_log(CL_ANN, (KERN_NOTICE
2313 "megaraid: aborted cmd [%x] completed\n",
2314 scb->sno));
2315 }
2316
2317 /*
2318 * If the inquiry came of a disk drive which is not part of
2319 * any RAID array, expose it to the kernel. For this to be
2320 * enabled, user must set the "megaraid_expose_unconf_disks"
2321 * flag to 1 by specifying it on module parameter list.
2322 * This would enable data migration off drives from other
2323 * configurations.
2324 */
2325 islogical = MRAID_IS_LOGICAL(adapter, scp);
2326 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2327 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2328
2329 sgl = scsi_sglist(scp);
2330 if (sg_page(sgl)) {
2331 c = *(unsigned char *) sg_virt(&sgl[0]);
2332 } else {
2333 con_log(CL_ANN, (KERN_WARNING
2334 "megaraid mailbox: invalid sg:%d\n",
2335 __LINE__));
2336 c = 0;
2337 }
2338
2339 if ((c & 0x1F ) == TYPE_DISK) {
2340 pdev_index = (scb->dev_channel * 16) +
2341 scb->dev_target;
2342 pdev_state =
2343 raid_dev->pdrv_state[pdev_index] & 0x0F;
2344
2345 if (pdev_state == PDRV_ONLINE ||
2346 pdev_state == PDRV_FAILED ||
2347 pdev_state == PDRV_RBLD ||
2348 pdev_state == PDRV_HOTSPARE ||
2349 megaraid_expose_unconf_disks == 0) {
2350
2351 status = 0xF0;
2352 }
2353 }
2354 }
2355
2356 // Convert MegaRAID status to Linux error code
2357 switch (status) {
2358
2359 case 0x00:
2360
2361 scp->result = (DID_OK << 16);
2362 break;
2363
2364 case 0x02:
2365
2366 /* set sense_buffer and result fields */
2367 if (mbox->cmd == MBOXCMD_PASSTHRU ||
2368 mbox->cmd == MBOXCMD_PASSTHRU64) {
2369
2370 memcpy(scp->sense_buffer, pthru->reqsensearea,
2371 14);
2372
2373 scp->result = DRIVER_SENSE << 24 |
2374 DID_OK << 16 | CHECK_CONDITION << 1;
2375 }
2376 else {
2377 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2378
2379 memcpy(scp->sense_buffer,
2380 epthru->reqsensearea, 14);
2381
2382 scp->result = DRIVER_SENSE << 24 |
2383 DID_OK << 16 |
2384 CHECK_CONDITION << 1;
2385 } else {
2386 scp->sense_buffer[0] = 0x70;
2387 scp->sense_buffer[2] = ABORTED_COMMAND;
2388 scp->result = CHECK_CONDITION << 1;
2389 }
2390 }
2391 break;
2392
2393 case 0x08:
2394
2395 scp->result = DID_BUS_BUSY << 16 | status;
2396 break;
2397
2398 default:
2399
2400 /*
2401 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2402 * failed
2403 */
2404 if (scp->cmnd[0] == TEST_UNIT_READY) {
2405 scp->result = DID_ERROR << 16 |
2406 RESERVATION_CONFLICT << 1;
2407 }
2408 else
2409 /*
2410 * Error code returned is 1 if Reserve or Release
2411 * failed or the input parameter is invalid
2412 */
2413 if (status == 1 && (scp->cmnd[0] == RESERVE ||
2414 scp->cmnd[0] == RELEASE)) {
2415
2416 scp->result = DID_ERROR << 16 |
2417 RESERVATION_CONFLICT << 1;
2418 }
2419 else {
2420 scp->result = DID_BAD_TARGET << 16 | status;
2421 }
2422 }
2423
2424 // print a debug message for all failed commands
2425 if (status) {
2426 megaraid_mbox_display_scb(adapter, scb);
2427 }
2428
2429 // Free our internal resources and call the mid-layer callback
2430 // routine
2431 megaraid_mbox_sync_scb(adapter, scb);
2432
2433 // remove from local clist
2434 list_del_init(&scb->list);
2435
2436 // put back in free list
2437 megaraid_dealloc_scb(adapter, scb);
2438
2439 // send the scsi packet back to kernel
2440 scp->scsi_done(scp);
2441 }
2442
2443 return;
2444 }
2445
2446
2447 /**
2448 * megaraid_abort_handler - abort the scsi command
2449 * @scp : command to be aborted
2450 *
2451 * Abort a previous SCSI request. Only commands on the pending list can be
2452 * aborted. All the commands issued to the F/W must complete.
2453 **/
2454 static int
2455 megaraid_abort_handler(struct scsi_cmnd *scp)
2456 {
2457 adapter_t *adapter;
2458 mraid_device_t *raid_dev;
2459 scb_t *scb;
2460 scb_t *tmp;
2461 int found;
2462 unsigned long flags;
2463 int i;
2464
2465
2466 adapter = SCP2ADAPTER(scp);
2467 raid_dev = ADAP2RAIDDEV(adapter);
2468
2469 con_log(CL_ANN, (KERN_WARNING
2470 "megaraid: aborting cmd=%x <c=%d t=%d l=%d>\n",
2471 scp->cmnd[0], SCP2CHANNEL(scp),
2472 SCP2TARGET(scp), SCP2LUN(scp)));
2473
2474 // If FW has stopped responding, simply return failure
2475 if (raid_dev->hw_error) {
2476 con_log(CL_ANN, (KERN_NOTICE
2477 "megaraid: hw error, not aborting\n"));
2478 return FAILED;
2479 }
2480
2481 // There might a race here, where the command was completed by the
2482 // firmware and now it is on the completed list. Before we could
2483 // complete the command to the kernel in dpc, the abort came.
2484 // Find out if this is the case to avoid the race.
2485 scb = NULL;
2486 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2487 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2488
2489 if (scb->scp == scp) { // Found command
2490
2491 list_del_init(&scb->list); // from completed list
2492
2493 con_log(CL_ANN, (KERN_WARNING
2494 "megaraid: %d[%d:%d], abort from completed list\n",
2495 scb->sno, scb->dev_channel, scb->dev_target));
2496
2497 scp->result = (DID_ABORT << 16);
2498 scp->scsi_done(scp);
2499
2500 megaraid_dealloc_scb(adapter, scb);
2501
2502 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2503 flags);
2504
2505 return SUCCESS;
2506 }
2507 }
2508 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2509
2510
2511 // Find out if this command is still on the pending list. If it is and
2512 // was never issued, abort and return success. If the command is owned
2513 // by the firmware, we must wait for it to complete by the FW.
2514 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2515 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2516
2517 if (scb->scp == scp) { // Found command
2518
2519 list_del_init(&scb->list); // from pending list
2520
2521 ASSERT(!(scb->state & SCB_ISSUED));
2522
2523 con_log(CL_ANN, (KERN_WARNING
2524 "megaraid abort: [%d:%d], driver owner\n",
2525 scb->dev_channel, scb->dev_target));
2526
2527 scp->result = (DID_ABORT << 16);
2528 scp->scsi_done(scp);
2529
2530 megaraid_dealloc_scb(adapter, scb);
2531
2532 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2533 flags);
2534
2535 return SUCCESS;
2536 }
2537 }
2538 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2539
2540
2541 // Check do we even own this command, in which case this would be
2542 // owned by the firmware. The only way to locate the FW scb is to
2543 // traverse through the list of all SCB, since driver does not
2544 // maintain these SCBs on any list
2545 found = 0;
2546 spin_lock_irq(&adapter->lock);
2547 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2548 scb = adapter->kscb_list + i;
2549
2550 if (scb->scp == scp) {
2551
2552 found = 1;
2553
2554 if (!(scb->state & SCB_ISSUED)) {
2555 con_log(CL_ANN, (KERN_WARNING
2556 "megaraid abort: %d[%d:%d], invalid state\n",
2557 scb->sno, scb->dev_channel, scb->dev_target));
2558 BUG();
2559 }
2560 else {
2561 con_log(CL_ANN, (KERN_WARNING
2562 "megaraid abort: %d[%d:%d], fw owner\n",
2563 scb->sno, scb->dev_channel, scb->dev_target));
2564 }
2565 }
2566 }
2567 spin_unlock_irq(&adapter->lock);
2568
2569 if (!found) {
2570 con_log(CL_ANN, (KERN_WARNING "megaraid abort: do now own\n"));
2571
2572 // FIXME: Should there be a callback for this command?
2573 return SUCCESS;
2574 }
2575
2576 // We cannot actually abort a command owned by firmware, return
2577 // failure and wait for reset. In host reset handler, we will find out
2578 // if the HBA is still live
2579 return FAILED;
2580 }
2581
2582 /**
2583 * megaraid_reset_handler - device reset handler for mailbox based driver
2584 * @scp : reference command
2585 *
2586 * Reset handler for the mailbox based controller. First try to find out if
2587 * the FW is still live, in which case the outstanding commands counter mut go
2588 * down to 0. If that happens, also issue the reservation reset command to
2589 * relinquish (possible) reservations on the logical drives connected to this
2590 * host.
2591 **/
2592 static int
2593 megaraid_reset_handler(struct scsi_cmnd *scp)
2594 {
2595 adapter_t *adapter;
2596 scb_t *scb;
2597 scb_t *tmp;
2598 mraid_device_t *raid_dev;
2599 unsigned long flags;
2600 uint8_t raw_mbox[sizeof(mbox_t)];
2601 int rval;
2602 int recovery_window;
2603 int recovering;
2604 int i;
2605 uioc_t *kioc;
2606
2607 adapter = SCP2ADAPTER(scp);
2608 raid_dev = ADAP2RAIDDEV(adapter);
2609
2610 // return failure if adapter is not responding
2611 if (raid_dev->hw_error) {
2612 con_log(CL_ANN, (KERN_NOTICE
2613 "megaraid: hw error, cannot reset\n"));
2614 return FAILED;
2615 }
2616
2617
2618 // Under exceptional conditions, FW can take up to 3 minutes to
2619 // complete command processing. Wait for additional 2 minutes for the
2620 // pending commands counter to go down to 0. If it doesn't, let the
2621 // controller be marked offline
2622 // Also, reset all the commands currently owned by the driver
2623 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2624 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2625 list_del_init(&scb->list); // from pending list
2626
2627 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2628 con_log(CL_ANN, (KERN_WARNING
2629 "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2630 scb->sno, scb->dev_channel, scb->dev_target));
2631
2632 scb->status = -1;
2633
2634 kioc = (uioc_t *)scb->gp;
2635 kioc->status = -EFAULT;
2636
2637 megaraid_mbox_mm_done(adapter, scb);
2638 } else {
2639 if (scb->scp == scp) { // Found command
2640 con_log(CL_ANN, (KERN_WARNING
2641 "megaraid: %d[%d:%d], reset from pending list\n",
2642 scb->sno, scb->dev_channel, scb->dev_target));
2643 } else {
2644 con_log(CL_ANN, (KERN_WARNING
2645 "megaraid: IO packet with %d[%d:%d] being reset\n",
2646 scb->sno, scb->dev_channel, scb->dev_target));
2647 }
2648
2649 scb->scp->result = (DID_RESET << 16);
2650 scb->scp->scsi_done(scb->scp);
2651
2652 megaraid_dealloc_scb(adapter, scb);
2653 }
2654 }
2655 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2656
2657 if (adapter->outstanding_cmds) {
2658 con_log(CL_ANN, (KERN_NOTICE
2659 "megaraid: %d outstanding commands. Max wait %d sec\n",
2660 adapter->outstanding_cmds,
2661 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
2662 }
2663
2664 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2665
2666 recovering = adapter->outstanding_cmds;
2667
2668 for (i = 0; i < recovery_window; i++) {
2669
2670 megaraid_ack_sequence(adapter);
2671
2672 // print a message once every 5 seconds only
2673 if (!(i % 5)) {
2674 con_log(CL_ANN, (
2675 "megaraid mbox: Wait for %d commands to complete:%d\n",
2676 adapter->outstanding_cmds,
2677 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
2678 }
2679
2680 // bailout if no recovery happened in reset time
2681 if (adapter->outstanding_cmds == 0) {
2682 break;
2683 }
2684
2685 msleep(1000);
2686 }
2687
2688 spin_lock(&adapter->lock);
2689
2690 // If still outstanding commands, bail out
2691 if (adapter->outstanding_cmds) {
2692 con_log(CL_ANN, (KERN_WARNING
2693 "megaraid mbox: critical hardware error!\n"));
2694
2695 raid_dev->hw_error = 1;
2696
2697 rval = FAILED;
2698 goto out;
2699 }
2700 else {
2701 con_log(CL_ANN, (KERN_NOTICE
2702 "megaraid mbox: reset sequence completed successfully\n"));
2703 }
2704
2705
2706 // If the controller supports clustering, reset reservations
2707 if (!adapter->ha) {
2708 rval = SUCCESS;
2709 goto out;
2710 }
2711
2712 // clear reservations if any
2713 raw_mbox[0] = CLUSTER_CMD;
2714 raw_mbox[2] = RESET_RESERVATIONS;
2715
2716 rval = SUCCESS;
2717 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2718 con_log(CL_ANN,
2719 (KERN_INFO "megaraid: reservation reset\n"));
2720 }
2721 else {
2722 rval = FAILED;
2723 con_log(CL_ANN, (KERN_WARNING
2724 "megaraid: reservation reset failed\n"));
2725 }
2726
2727 out:
2728 spin_unlock(&adapter->lock);
2729 return rval;
2730 }
2731
2732 /*
2733 * START: internal commands library
2734 *
2735 * This section of the driver has the common routine used by the driver and
2736 * also has all the FW routines
2737 */
2738
2739 /**
2740 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2741 * @adapter : controller's soft state
2742 * @raw_mbox : the mailbox
2743 *
2744 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2745 * controllers.
2746 */
2747 static int
2748 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2749 {
2750 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2751 mbox64_t *mbox64;
2752 mbox_t *mbox;
2753 uint8_t status;
2754 int i;
2755
2756
2757 mbox64 = raid_dev->mbox64;
2758 mbox = raid_dev->mbox;
2759
2760 /*
2761 * Wait until mailbox is free
2762 */
2763 if (megaraid_busywait_mbox(raid_dev) != 0)
2764 goto blocked_mailbox;
2765
2766 /*
2767 * Copy mailbox data into host structure
2768 */
2769 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2770 mbox->cmdid = 0xFE;
2771 mbox->busy = 1;
2772 mbox->poll = 0;
2773 mbox->ack = 0;
2774 mbox->numstatus = 0xFF;
2775 mbox->status = 0xFF;
2776
2777 wmb();
2778 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2779
2780 // wait for maximum 1 second for status to post. If the status is not
2781 // available within 1 second, assume FW is initializing and wait
2782 // for an extended amount of time
2783 if (mbox->numstatus == 0xFF) { // status not yet available
2784 udelay(25);
2785
2786 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2787 rmb();
2788 msleep(1);
2789 }
2790
2791
2792 if (i == 1000) {
2793 con_log(CL_ANN, (KERN_NOTICE
2794 "megaraid mailbox: wait for FW to boot "));
2795
2796 for (i = 0; (mbox->numstatus == 0xFF) &&
2797 (i < MBOX_RESET_WAIT); i++) {
2798 rmb();
2799 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2800 MBOX_RESET_WAIT - i));
2801 msleep(1000);
2802 }
2803
2804 if (i == MBOX_RESET_WAIT) {
2805
2806 con_log(CL_ANN, (
2807 "\nmegaraid mailbox: status not available\n"));
2808
2809 return -1;
2810 }
2811 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2812 }
2813 }
2814
2815 // wait for maximum 1 second for poll semaphore
2816 if (mbox->poll != 0x77) {
2817 udelay(25);
2818
2819 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2820 rmb();
2821 msleep(1);
2822 }
2823
2824 if (i == 1000) {
2825 con_log(CL_ANN, (KERN_WARNING
2826 "megaraid mailbox: could not get poll semaphore\n"));
2827 return -1;
2828 }
2829 }
2830
2831 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2832 wmb();
2833
2834 // wait for maximum 1 second for acknowledgement
2835 if (RDINDOOR(raid_dev) & 0x2) {
2836 udelay(25);
2837
2838 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2839 rmb();
2840 msleep(1);
2841 }
2842
2843 if (i == 1000) {
2844 con_log(CL_ANN, (KERN_WARNING
2845 "megaraid mailbox: could not acknowledge\n"));
2846 return -1;
2847 }
2848 }
2849 mbox->poll = 0;
2850 mbox->ack = 0x77;
2851
2852 status = mbox->status;
2853
2854 // invalidate the completed command id array. After command
2855 // completion, firmware would write the valid id.
2856 mbox->numstatus = 0xFF;
2857 mbox->status = 0xFF;
2858 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2859 mbox->completed[i] = 0xFF;
2860 }
2861
2862 return status;
2863
2864 blocked_mailbox:
2865
2866 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2867 return -1;
2868 }
2869
2870
2871 /**
2872 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2873 * @adapter : controller's soft state
2874 * @raw_mbox : the mailbox
2875 *
2876 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2877 * controllers. This is a faster version of the synchronous command and
2878 * therefore can be called in interrupt-context as well.
2879 */
2880 static int
2881 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2882 {
2883 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2884 mbox_t *mbox;
2885 long i;
2886
2887
2888 mbox = raid_dev->mbox;
2889
2890 // return immediately if the mailbox is busy
2891 if (mbox->busy) return -1;
2892
2893 // Copy mailbox data into host structure
2894 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2895 mbox->cmdid = 0xFE;
2896 mbox->busy = 1;
2897 mbox->poll = 0;
2898 mbox->ack = 0;
2899 mbox->numstatus = 0xFF;
2900 mbox->status = 0xFF;
2901
2902 wmb();
2903 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2904
2905 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
2906 if (mbox->numstatus != 0xFF) break;
2907 rmb();
2908 udelay(MBOX_SYNC_DELAY_200);
2909 }
2910
2911 if (i == MBOX_SYNC_WAIT_CNT) {
2912 // We may need to re-calibrate the counter
2913 con_log(CL_ANN, (KERN_CRIT
2914 "megaraid: fast sync command timed out\n"));
2915 }
2916
2917 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2918 wmb();
2919
2920 return mbox->status;
2921 }
2922
2923
2924 /**
2925 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
2926 * @raid_dev : RAID device (HBA) soft state
2927 *
2928 * Wait until the controller's mailbox is available to accept more commands.
2929 * Wait for at most 1 second.
2930 */
2931 static int
2932 megaraid_busywait_mbox(mraid_device_t *raid_dev)
2933 {
2934 mbox_t *mbox = raid_dev->mbox;
2935 int i = 0;
2936
2937 if (mbox->busy) {
2938 udelay(25);
2939 for (i = 0; mbox->busy && i < 1000; i++)
2940 msleep(1);
2941 }
2942
2943 if (i < 1000) return 0;
2944 else return -1;
2945 }
2946
2947
2948 /**
2949 * megaraid_mbox_product_info - some static information about the controller
2950 * @adapter : our soft state
2951 *
2952 * Issue commands to the controller to grab some parameters required by our
2953 * caller.
2954 */
2955 static int
2956 megaraid_mbox_product_info(adapter_t *adapter)
2957 {
2958 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2959 mbox_t *mbox;
2960 uint8_t raw_mbox[sizeof(mbox_t)];
2961 mraid_pinfo_t *pinfo;
2962 dma_addr_t pinfo_dma_h;
2963 mraid_inquiry3_t *mraid_inq3;
2964 int i;
2965
2966
2967 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2968 mbox = (mbox_t *)raw_mbox;
2969
2970 /*
2971 * Issue an ENQUIRY3 command to find out certain adapter parameters,
2972 * e.g., max channels, max commands etc.
2973 */
2974 pinfo = pci_zalloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
2975 &pinfo_dma_h);
2976
2977 if (pinfo == NULL) {
2978 con_log(CL_ANN, (KERN_WARNING
2979 "megaraid: out of memory, %s %d\n", __func__,
2980 __LINE__));
2981
2982 return -1;
2983 }
2984
2985 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
2986 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
2987
2988 raw_mbox[0] = FC_NEW_CONFIG;
2989 raw_mbox[2] = NC_SUBOP_ENQUIRY3;
2990 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
2991
2992 // Issue the command
2993 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
2994
2995 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
2996
2997 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
2998 pinfo, pinfo_dma_h);
2999
3000 return -1;
3001 }
3002
3003 /*
3004 * Collect information about state of each physical drive
3005 * attached to the controller. We will expose all the disks
3006 * which are not part of RAID
3007 */
3008 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3009 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3010 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3011 }
3012
3013 /*
3014 * Get product info for information like number of channels,
3015 * maximum commands supported.
3016 */
3017 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3018 mbox->xferaddr = (uint32_t)pinfo_dma_h;
3019
3020 raw_mbox[0] = FC_NEW_CONFIG;
3021 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3022
3023 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3024
3025 con_log(CL_ANN, (KERN_WARNING
3026 "megaraid: product info failed\n"));
3027
3028 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3029 pinfo, pinfo_dma_h);
3030
3031 return -1;
3032 }
3033
3034 /*
3035 * Setup some parameters for host, as required by our caller
3036 */
3037 adapter->max_channel = pinfo->nchannels;
3038
3039 /*
3040 * we will export all the logical drives on a single channel.
3041 * Add 1 since inquires do not come for inititor ID
3042 */
3043 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1;
3044 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices
3045
3046 /*
3047 * These are the maximum outstanding commands for the scsi-layer
3048 */
3049 adapter->max_cmds = MBOX_MAX_SCSI_CMDS;
3050
3051 memset(adapter->fw_version, 0, VERSION_SIZE);
3052 memset(adapter->bios_version, 0, VERSION_SIZE);
3053
3054 memcpy(adapter->fw_version, pinfo->fw_version, 4);
3055 adapter->fw_version[4] = 0;
3056
3057 memcpy(adapter->bios_version, pinfo->bios_version, 4);
3058 adapter->bios_version[4] = 0;
3059
3060 con_log(CL_ANN, (KERN_NOTICE
3061 "megaraid: fw version:[%s] bios version:[%s]\n",
3062 adapter->fw_version, adapter->bios_version));
3063
3064 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3065 pinfo_dma_h);
3066
3067 return 0;
3068 }
3069
3070
3071
3072 /**
3073 * megaraid_mbox_extended_cdb - check for support for extended CDBs
3074 * @adapter : soft state for the controller
3075 *
3076 * This routine check whether the controller in question supports extended
3077 * ( > 10 bytes ) CDBs.
3078 */
3079 static int
3080 megaraid_mbox_extended_cdb(adapter_t *adapter)
3081 {
3082 mbox_t *mbox;
3083 uint8_t raw_mbox[sizeof(mbox_t)];
3084 int rval;
3085
3086 mbox = (mbox_t *)raw_mbox;
3087
3088 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3089 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3090
3091 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3092
3093 raw_mbox[0] = MAIN_MISC_OPCODE;
3094 raw_mbox[2] = SUPPORT_EXT_CDB;
3095
3096 /*
3097 * Issue the command
3098 */
3099 rval = 0;
3100 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3101 rval = -1;
3102 }
3103
3104 return rval;
3105 }
3106
3107
3108 /**
3109 * megaraid_mbox_support_ha - Do we support clustering
3110 * @adapter : soft state for the controller
3111 * @init_id : ID of the initiator
3112 *
3113 * Determine if the firmware supports clustering and the ID of the initiator.
3114 */
3115 static int
3116 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3117 {
3118 mbox_t *mbox;
3119 uint8_t raw_mbox[sizeof(mbox_t)];
3120 int rval;
3121
3122
3123 mbox = (mbox_t *)raw_mbox;
3124
3125 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3126
3127 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3128
3129 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3130
3131 raw_mbox[0] = GET_TARGET_ID;
3132
3133 // Issue the command
3134 *init_id = 7;
3135 rval = -1;
3136 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3137
3138 *init_id = *(uint8_t *)adapter->ibuf;
3139
3140 con_log(CL_ANN, (KERN_INFO
3141 "megaraid: cluster firmware, initiator ID: %d\n",
3142 *init_id));
3143
3144 rval = 0;
3145 }
3146
3147 return rval;
3148 }
3149
3150
3151 /**
3152 * megaraid_mbox_support_random_del - Do we support random deletion
3153 * @adapter : soft state for the controller
3154 *
3155 * Determine if the firmware supports random deletion.
3156 * Return: 1 is operation supported, 0 otherwise
3157 */
3158 static int
3159 megaraid_mbox_support_random_del(adapter_t *adapter)
3160 {
3161 mbox_t *mbox;
3162 uint8_t raw_mbox[sizeof(mbox_t)];
3163 int rval;
3164
3165 /*
3166 * Newer firmware on Dell CERC expect a different
3167 * random deletion handling, so disable it.
3168 */
3169 if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI &&
3170 adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 &&
3171 adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
3172 adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH &&
3173 (adapter->fw_version[0] > '6' ||
3174 (adapter->fw_version[0] == '6' &&
3175 adapter->fw_version[2] > '6') ||
3176 (adapter->fw_version[0] == '6'
3177 && adapter->fw_version[2] == '6'
3178 && adapter->fw_version[3] > '1'))) {
3179 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n"));
3180 return 0;
3181 }
3182
3183 mbox = (mbox_t *)raw_mbox;
3184
3185 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3186
3187 raw_mbox[0] = FC_DEL_LOGDRV;
3188 raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3189
3190 // Issue the command
3191 rval = 0;
3192 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3193
3194 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3195
3196 rval = 1;
3197 }
3198
3199 return rval;
3200 }
3201
3202
3203 /**
3204 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3205 * @adapter : soft state for the controller
3206 *
3207 * Find out the maximum number of scatter-gather elements supported by the
3208 * firmware.
3209 */
3210 static int
3211 megaraid_mbox_get_max_sg(adapter_t *adapter)
3212 {
3213 mbox_t *mbox;
3214 uint8_t raw_mbox[sizeof(mbox_t)];
3215 int nsg;
3216
3217
3218 mbox = (mbox_t *)raw_mbox;
3219
3220 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3221
3222 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3223
3224 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3225
3226 raw_mbox[0] = MAIN_MISC_OPCODE;
3227 raw_mbox[2] = GET_MAX_SG_SUPPORT;
3228
3229 // Issue the command
3230 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3231 nsg = *(uint8_t *)adapter->ibuf;
3232 }
3233 else {
3234 nsg = MBOX_DEFAULT_SG_SIZE;
3235 }
3236
3237 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3238
3239 return nsg;
3240 }
3241
3242
3243 /**
3244 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3245 * @adapter : soft state for the controller
3246 *
3247 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3248 * can be exported as regular SCSI channels.
3249 */
3250 static void
3251 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3252 {
3253 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3254 mbox_t *mbox;
3255 uint8_t raw_mbox[sizeof(mbox_t)];
3256
3257
3258 mbox = (mbox_t *)raw_mbox;
3259
3260 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3261
3262 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3263
3264 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3265
3266 raw_mbox[0] = CHNL_CLASS;
3267 raw_mbox[2] = GET_CHNL_CLASS;
3268
3269 // Issue the command. If the command fails, all channels are RAID
3270 // channels
3271 raid_dev->channel_class = 0xFF;
3272 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3273 raid_dev->channel_class = *(uint8_t *)adapter->ibuf;
3274 }
3275
3276 return;
3277 }
3278
3279
3280 /**
3281 * megaraid_mbox_flush_cache - flush adapter and disks cache
3282 * @adapter : soft state for the controller
3283 *
3284 * Flush adapter cache followed by disks cache.
3285 */
3286 static void
3287 megaraid_mbox_flush_cache(adapter_t *adapter)
3288 {
3289 mbox_t *mbox;
3290 uint8_t raw_mbox[sizeof(mbox_t)];
3291
3292
3293 mbox = (mbox_t *)raw_mbox;
3294
3295 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3296
3297 raw_mbox[0] = FLUSH_ADAPTER;
3298
3299 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3300 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3301 }
3302
3303 raw_mbox[0] = FLUSH_SYSTEM;
3304
3305 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3306 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3307 }
3308
3309 return;
3310 }
3311
3312
3313 /**
3314 * megaraid_mbox_fire_sync_cmd - fire the sync cmd
3315 * @adapter : soft state for the controller
3316 *
3317 * Clears the pending cmds in FW and reinits its RAID structs.
3318 */
3319 static int
3320 megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3321 {
3322 mbox_t *mbox;
3323 uint8_t raw_mbox[sizeof(mbox_t)];
3324 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3325 mbox64_t *mbox64;
3326 int status = 0;
3327 int i;
3328 uint32_t dword;
3329
3330 mbox = (mbox_t *)raw_mbox;
3331
3332 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3333
3334 raw_mbox[0] = 0xFF;
3335
3336 mbox64 = raid_dev->mbox64;
3337 mbox = raid_dev->mbox;
3338
3339 /* Wait until mailbox is free */
3340 if (megaraid_busywait_mbox(raid_dev) != 0) {
3341 status = 1;
3342 goto blocked_mailbox;
3343 }
3344
3345 /* Copy mailbox data into host structure */
3346 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3347 mbox->cmdid = 0xFE;
3348 mbox->busy = 1;
3349 mbox->poll = 0;
3350 mbox->ack = 0;
3351 mbox->numstatus = 0;
3352 mbox->status = 0;
3353
3354 wmb();
3355 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3356
3357 /* Wait for maximum 1 min for status to post.
3358 * If the Firmware SUPPORTS the ABOVE COMMAND,
3359 * mbox->cmd will be set to 0
3360 * else
3361 * the firmware will reject the command with
3362 * mbox->numstatus set to 1
3363 */
3364
3365 i = 0;
3366 status = 0;
3367 while (!mbox->numstatus && mbox->cmd == 0xFF) {
3368 rmb();
3369 msleep(1);
3370 i++;
3371 if (i > 1000 * 60) {
3372 status = 1;
3373 break;
3374 }
3375 }
3376 if (mbox->numstatus == 1)
3377 status = 1; /*cmd not supported*/
3378
3379 /* Check for interrupt line */
3380 dword = RDOUTDOOR(raid_dev);
3381 WROUTDOOR(raid_dev, dword);
3382 WRINDOOR(raid_dev,2);
3383
3384 return status;
3385
3386 blocked_mailbox:
3387 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3388 return status;
3389 }
3390
3391 /**
3392 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3393 * @adapter : controller's soft state
3394 * @scb : SCB to be displayed
3395 * @level : debug level for console print
3396 *
3397 * Diplay information about the given SCB iff the current debug level is
3398 * verbose.
3399 */
3400 static void
3401 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3402 {
3403 mbox_ccb_t *ccb;
3404 struct scsi_cmnd *scp;
3405 mbox_t *mbox;
3406 int level;
3407 int i;
3408
3409
3410 ccb = (mbox_ccb_t *)scb->ccb;
3411 scp = scb->scp;
3412 mbox = ccb->mbox;
3413
3414 level = CL_DLEVEL3;
3415
3416 con_log(level, (KERN_NOTICE
3417 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3418 mbox->cmd, scb->sno));
3419
3420 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3421 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3422 mbox->numsge));
3423
3424 if (!scp) return;
3425
3426 con_log(level, (KERN_NOTICE "scsi cmnd: "));
3427
3428 for (i = 0; i < scp->cmd_len; i++) {
3429 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3430 }
3431
3432 con_log(level, ("\n"));
3433
3434 return;
3435 }
3436
3437
3438 /**
3439 * megaraid_mbox_setup_device_map - manage device ids
3440 * @adapter : Driver's soft state
3441 *
3442 * Manage the device ids to have an appropriate mapping between the kernel
3443 * scsi addresses and megaraid scsi and logical drive addresses. We export
3444 * scsi devices on their actual addresses, whereas the logical drives are
3445 * exported on a virtual scsi channel.
3446 */
3447 static void
3448 megaraid_mbox_setup_device_map(adapter_t *adapter)
3449 {
3450 uint8_t c;
3451 uint8_t t;
3452
3453 /*
3454 * First fill the values on the logical drive channel
3455 */
3456 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3457 adapter->device_ids[adapter->max_channel][t] =
3458 (t < adapter->init_id) ? t : t - 1;
3459
3460 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3461
3462 /*
3463 * Fill the values on the physical devices channels
3464 */
3465 for (c = 0; c < adapter->max_channel; c++)
3466 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3467 adapter->device_ids[c][t] = (c << 8) | t;
3468 }
3469
3470
3471 /*
3472 * END: internal commands library
3473 */
3474
3475 /*
3476 * START: Interface for the common management module
3477 *
3478 * This is the module, which interfaces with the common management module to
3479 * provide support for ioctl and sysfs
3480 */
3481
3482 /**
3483 * megaraid_cmm_register - register with the management module
3484 * @adapter : HBA soft state
3485 *
3486 * Register with the management module, which allows applications to issue
3487 * ioctl calls to the drivers. This interface is used by the management module
3488 * to setup sysfs support as well.
3489 */
3490 static int
3491 megaraid_cmm_register(adapter_t *adapter)
3492 {
3493 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3494 mraid_mmadp_t adp;
3495 scb_t *scb;
3496 mbox_ccb_t *ccb;
3497 int rval;
3498 int i;
3499
3500 // Allocate memory for the base list of scb for management module.
3501 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL);
3502
3503 if (adapter->uscb_list == NULL) {
3504 con_log(CL_ANN, (KERN_WARNING
3505 "megaraid: out of memory, %s %d\n", __func__,
3506 __LINE__));
3507 return -1;
3508 }
3509
3510
3511 // Initialize the synchronization parameters for resources for
3512 // commands for management module
3513 INIT_LIST_HEAD(&adapter->uscb_pool);
3514
3515 spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3516
3517
3518
3519 // link all the packets. Note, CCB for commands, coming from the
3520 // commom management module, mailbox physical address are already
3521 // setup by it. We just need placeholder for that in our local command
3522 // control blocks
3523 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3524
3525 scb = adapter->uscb_list + i;
3526 ccb = raid_dev->uccb_list + i;
3527
3528 scb->ccb = (caddr_t)ccb;
3529 ccb->mbox64 = raid_dev->umbox64 + i;
3530 ccb->mbox = &ccb->mbox64->mbox32;
3531 ccb->raw_mbox = (uint8_t *)ccb->mbox;
3532
3533 scb->gp = 0;
3534
3535 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3536 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3537 scb->sno = i + MBOX_MAX_SCSI_CMDS;
3538
3539 scb->scp = NULL;
3540 scb->state = SCB_FREE;
3541 scb->dma_direction = PCI_DMA_NONE;
3542 scb->dma_type = MRAID_DMA_NONE;
3543 scb->dev_channel = -1;
3544 scb->dev_target = -1;
3545
3546 // put scb in the free pool
3547 list_add_tail(&scb->list, &adapter->uscb_pool);
3548 }
3549
3550 adp.unique_id = adapter->unique_id;
3551 adp.drvr_type = DRVRTYPE_MBOX;
3552 adp.drvr_data = (unsigned long)adapter;
3553 adp.pdev = adapter->pdev;
3554 adp.issue_uioc = megaraid_mbox_mm_handler;
3555 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
3556 adp.max_kioc = MBOX_MAX_USER_CMDS;
3557
3558 if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3559
3560 con_log(CL_ANN, (KERN_WARNING
3561 "megaraid mbox: did not register with CMM\n"));
3562
3563 kfree(adapter->uscb_list);
3564 }
3565
3566 return rval;
3567 }
3568
3569
3570 /**
3571 * megaraid_cmm_unregister - un-register with the management module
3572 * @adapter : HBA soft state
3573 *
3574 * Un-register with the management module.
3575 * FIXME: mgmt module must return failure for unregister if it has pending
3576 * commands in LLD.
3577 */
3578 static int
3579 megaraid_cmm_unregister(adapter_t *adapter)
3580 {
3581 kfree(adapter->uscb_list);
3582 mraid_mm_unregister_adp(adapter->unique_id);
3583 return 0;
3584 }
3585
3586
3587 /**
3588 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3589 * @drvr_data : LLD specific data
3590 * @kioc : CMM interface packet
3591 * @action : command action
3592 *
3593 * This routine is invoked whenever the Common Management Module (CMM) has a
3594 * command for us. The 'action' parameter specifies if this is a new command
3595 * or otherwise.
3596 */
3597 static int
3598 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3599 {
3600 adapter_t *adapter;
3601
3602 if (action != IOCTL_ISSUE) {
3603 con_log(CL_ANN, (KERN_WARNING
3604 "megaraid: unsupported management action:%#2x\n",
3605 action));
3606 return (-ENOTSUPP);
3607 }
3608
3609 adapter = (adapter_t *)drvr_data;
3610
3611 // make sure this adapter is not being detached right now.
3612 if (atomic_read(&adapter->being_detached)) {
3613 con_log(CL_ANN, (KERN_WARNING
3614 "megaraid: reject management request, detaching\n"));
3615 return (-ENODEV);
3616 }
3617
3618 switch (kioc->opcode) {
3619
3620 case GET_ADAP_INFO:
3621
3622 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *)
3623 (unsigned long)kioc->buf_vaddr);
3624
3625 kioc->done(kioc);
3626
3627 return kioc->status;
3628
3629 case MBOX_CMD:
3630
3631 return megaraid_mbox_mm_command(adapter, kioc);
3632
3633 default:
3634 kioc->status = (-EINVAL);
3635 kioc->done(kioc);
3636 return (-EINVAL);
3637 }
3638
3639 return 0; // not reached
3640 }
3641
3642 /**
3643 * megaraid_mbox_mm_command - issues commands routed through CMM
3644 * @adapter : HBA soft state
3645 * @kioc : management command packet
3646 *
3647 * Issues commands, which are routed through the management module.
3648 */
3649 static int
3650 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3651 {
3652 struct list_head *head = &adapter->uscb_pool;
3653 mbox64_t *mbox64;
3654 uint8_t *raw_mbox;
3655 scb_t *scb;
3656 mbox_ccb_t *ccb;
3657 unsigned long flags;
3658
3659 // detach one scb from free pool
3660 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3661
3662 if (list_empty(head)) { // should never happen because of CMM
3663
3664 con_log(CL_ANN, (KERN_WARNING
3665 "megaraid mbox: bug in cmm handler, lost resources\n"));
3666
3667 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3668
3669 return (-EINVAL);
3670 }
3671
3672 scb = list_entry(head->next, scb_t, list);
3673 list_del_init(&scb->list);
3674
3675 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3676
3677 scb->state = SCB_ACTIVE;
3678 scb->dma_type = MRAID_DMA_NONE;
3679 scb->dma_direction = PCI_DMA_NONE;
3680
3681 ccb = (mbox_ccb_t *)scb->ccb;
3682 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3683 raw_mbox = (uint8_t *)&mbox64->mbox32;
3684
3685 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3686
3687 scb->gp = (unsigned long)kioc;
3688
3689 /*
3690 * If it is a logdrv random delete operation, we have to wait till
3691 * there are no outstanding cmds at the fw and then issue it directly
3692 */
3693 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3694
3695 if (wait_till_fw_empty(adapter)) {
3696 con_log(CL_ANN, (KERN_NOTICE
3697 "megaraid mbox: LD delete, timed out\n"));
3698
3699 kioc->status = -ETIME;
3700
3701 scb->status = -1;
3702
3703 megaraid_mbox_mm_done(adapter, scb);
3704
3705 return (-ETIME);
3706 }
3707
3708 INIT_LIST_HEAD(&scb->list);
3709
3710 scb->state = SCB_ISSUED;
3711 if (mbox_post_cmd(adapter, scb) != 0) {
3712
3713 con_log(CL_ANN, (KERN_NOTICE
3714 "megaraid mbox: LD delete, mailbox busy\n"));
3715
3716 kioc->status = -EBUSY;
3717
3718 scb->status = -1;
3719
3720 megaraid_mbox_mm_done(adapter, scb);
3721
3722 return (-EBUSY);
3723 }
3724
3725 return 0;
3726 }
3727
3728 // put the command on the pending list and execute
3729 megaraid_mbox_runpendq(adapter, scb);
3730
3731 return 0;
3732 }
3733
3734
3735 static int
3736 wait_till_fw_empty(adapter_t *adapter)
3737 {
3738 unsigned long flags = 0;
3739 int i;
3740
3741
3742 /*
3743 * Set the quiescent flag to stop issuing cmds to FW.
3744 */
3745 spin_lock_irqsave(&adapter->lock, flags);
3746 adapter->quiescent++;
3747 spin_unlock_irqrestore(&adapter->lock, flags);
3748
3749 /*
3750 * Wait till there are no more cmds outstanding at FW. Try for at most
3751 * 60 seconds
3752 */
3753 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3754 con_log(CL_DLEVEL1, (KERN_INFO
3755 "megaraid: FW has %d pending commands\n",
3756 adapter->outstanding_cmds));
3757
3758 msleep(1000);
3759 }
3760
3761 return adapter->outstanding_cmds;
3762 }
3763
3764
3765 /**
3766 * megaraid_mbox_mm_done - callback for CMM commands
3767 * @adapter : HBA soft state
3768 * @scb : completed command
3769 *
3770 * Callback routine for internal commands originated from the management
3771 * module.
3772 */
3773 static void
3774 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3775 {
3776 uioc_t *kioc;
3777 mbox64_t *mbox64;
3778 uint8_t *raw_mbox;
3779 unsigned long flags;
3780
3781 kioc = (uioc_t *)scb->gp;
3782 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3783 mbox64->mbox32.status = scb->status;
3784 raw_mbox = (uint8_t *)&mbox64->mbox32;
3785
3786
3787 // put scb in the free pool
3788 scb->state = SCB_FREE;
3789 scb->scp = NULL;
3790
3791 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3792
3793 list_add(&scb->list, &adapter->uscb_pool);
3794
3795 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3796
3797 // if a delete logical drive operation succeeded, restart the
3798 // controller
3799 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3800
3801 adapter->quiescent--;
3802
3803 megaraid_mbox_runpendq(adapter, NULL);
3804 }
3805
3806 kioc->done(kioc);
3807
3808 return;
3809 }
3810
3811
3812 /**
3813 * gather_hbainfo - HBA characteristics for the applications
3814 * @adapter : HBA soft state
3815 * @hinfo : pointer to the caller's host info strucuture
3816 */
3817 static int
3818 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3819 {
3820 uint8_t dmajor;
3821
3822 dmajor = megaraid_mbox_version[0];
3823
3824 hinfo->pci_vendor_id = adapter->pdev->vendor;
3825 hinfo->pci_device_id = adapter->pdev->device;
3826 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3827 hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3828
3829 hinfo->pci_bus = adapter->pdev->bus->number;
3830 hinfo->pci_dev_fn = adapter->pdev->devfn;
3831 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn);
3832 hinfo->irq = adapter->host->irq;
3833 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport;
3834
3835 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3836 hinfo->host_no = adapter->host->host_no;
3837
3838 return 0;
3839 }
3840
3841 /*
3842 * END: Interface for the common management module
3843 */
3844
3845
3846
3847 /**
3848 * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3849 * @adapter : controller's soft state
3850 *
3851 * Allocate packets required to issue FW calls whenever the sysfs attributes
3852 * are read. These attributes would require up-to-date information from the
3853 * FW. Also set up resources for mutual exclusion to share these resources and
3854 * the wait queue.
3855 *
3856 * Return 0 on success.
3857 * Return -ERROR_CODE on failure.
3858 */
3859 static int
3860 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3861 {
3862 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3863 int rval = 0;
3864
3865 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3866
3867 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3868
3869 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3870 PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3871
3872 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3873 !raid_dev->sysfs_buffer) {
3874
3875 con_log(CL_ANN, (KERN_WARNING
3876 "megaraid: out of memory, %s %d\n", __func__,
3877 __LINE__));
3878
3879 rval = -ENOMEM;
3880
3881 megaraid_sysfs_free_resources(adapter);
3882 }
3883
3884 mutex_init(&raid_dev->sysfs_mtx);
3885
3886 init_waitqueue_head(&raid_dev->sysfs_wait_q);
3887
3888 return rval;
3889 }
3890
3891
3892 /**
3893 * megaraid_sysfs_free_resources - free sysfs related resources
3894 * @adapter : controller's soft state
3895 *
3896 * Free packets allocated for sysfs FW commands
3897 */
3898 static void
3899 megaraid_sysfs_free_resources(adapter_t *adapter)
3900 {
3901 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3902
3903 kfree(raid_dev->sysfs_uioc);
3904 kfree(raid_dev->sysfs_mbox64);
3905
3906 if (raid_dev->sysfs_buffer) {
3907 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3908 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3909 }
3910 }
3911
3912
3913 /**
3914 * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3915 * @uioc : completed packet
3916 *
3917 * Callback routine called in the ISR/tasklet context for get ldmap call
3918 */
3919 static void
3920 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3921 {
3922 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3923 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3924
3925 uioc->status = 0;
3926
3927 wake_up(&raid_dev->sysfs_wait_q);
3928 }
3929
3930
3931 /**
3932 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3933 * @data : timed out packet
3934 *
3935 * Timeout routine to recover and return to application, in case the adapter
3936 * has stopped responding. A timeout of 60 seconds for this command seems like
3937 * a good value.
3938 */
3939 static void
3940 megaraid_sysfs_get_ldmap_timeout(unsigned long data)
3941 {
3942 uioc_t *uioc = (uioc_t *)data;
3943 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3944 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3945
3946 uioc->status = -ETIME;
3947
3948 wake_up(&raid_dev->sysfs_wait_q);
3949 }
3950
3951
3952 /**
3953 * megaraid_sysfs_get_ldmap - get update logical drive map
3954 * @adapter : controller's soft state
3955 *
3956 * This routine will be called whenever user reads the logical drive
3957 * attributes, go get the current logical drive mapping table from the
3958 * firmware. We use the management API's to issue commands to the controller.
3959 *
3960 * NOTE: The commands issuance functionality is not generalized and
3961 * implemented in context of "get ld map" command only. If required, the
3962 * command issuance logical can be trivially pulled out and implemented as a
3963 * standalone library. For now, this should suffice since there is no other
3964 * user of this interface.
3965 *
3966 * Return 0 on success.
3967 * Return -1 on failure.
3968 */
3969 static int
3970 megaraid_sysfs_get_ldmap(adapter_t *adapter)
3971 {
3972 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3973 uioc_t *uioc;
3974 mbox64_t *mbox64;
3975 mbox_t *mbox;
3976 char *raw_mbox;
3977 struct timer_list sysfs_timer;
3978 struct timer_list *timerp;
3979 caddr_t ldmap;
3980 int rval = 0;
3981
3982 /*
3983 * Allow only one read at a time to go through the sysfs attributes
3984 */
3985 mutex_lock(&raid_dev->sysfs_mtx);
3986
3987 uioc = raid_dev->sysfs_uioc;
3988 mbox64 = raid_dev->sysfs_mbox64;
3989 ldmap = raid_dev->sysfs_buffer;
3990
3991 memset(uioc, 0, sizeof(uioc_t));
3992 memset(mbox64, 0, sizeof(mbox64_t));
3993 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
3994
3995 mbox = &mbox64->mbox32;
3996 raw_mbox = (char *)mbox;
3997 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64;
3998 uioc->buf_vaddr = (caddr_t)adapter;
3999 uioc->status = -ENODATA;
4000 uioc->done = megaraid_sysfs_get_ldmap_done;
4001
4002 /*
4003 * Prepare the mailbox packet to get the current logical drive mapping
4004 * table
4005 */
4006 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
4007
4008 raw_mbox[0] = FC_DEL_LOGDRV;
4009 raw_mbox[2] = OP_GET_LDID_MAP;
4010
4011 /*
4012 * Setup a timer to recover from a non-responding controller
4013 */
4014 timerp = &sysfs_timer;
4015 init_timer(timerp);
4016
4017 timerp->function = megaraid_sysfs_get_ldmap_timeout;
4018 timerp->data = (unsigned long)uioc;
4019 timerp->expires = jiffies + 60 * HZ;
4020
4021 add_timer(timerp);
4022
4023 /*
4024 * Send the command to the firmware
4025 */
4026 rval = megaraid_mbox_mm_command(adapter, uioc);
4027
4028 if (rval == 0) { // command successfully issued
4029 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4030
4031 /*
4032 * Check if the command timed out
4033 */
4034 if (uioc->status == -ETIME) {
4035 con_log(CL_ANN, (KERN_NOTICE
4036 "megaraid: sysfs get ld map timed out\n"));
4037
4038 rval = -ETIME;
4039 }
4040 else {
4041 rval = mbox->status;
4042 }
4043
4044 if (rval == 0) {
4045 memcpy(raid_dev->curr_ldmap, ldmap,
4046 sizeof(raid_dev->curr_ldmap));
4047 }
4048 else {
4049 con_log(CL_ANN, (KERN_NOTICE
4050 "megaraid: get ld map failed with %x\n", rval));
4051 }
4052 }
4053 else {
4054 con_log(CL_ANN, (KERN_NOTICE
4055 "megaraid: could not issue ldmap command:%x\n", rval));
4056 }
4057
4058
4059 del_timer_sync(timerp);
4060
4061 mutex_unlock(&raid_dev->sysfs_mtx);
4062
4063 return rval;
4064 }
4065
4066
4067 /**
4068 * megaraid_sysfs_show_app_hndl - display application handle for this adapter
4069 * @cdev : class device object representation for the host
4070 * @buf : buffer to send data to
4071 *
4072 * Display the handle used by the applications while executing management
4073 * tasks on the adapter. We invoke a management module API to get the adapter
4074 * handle, since we do not interface with applications directly.
4075 */
4076 static ssize_t
4077 megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr,
4078 char *buf)
4079 {
4080 struct Scsi_Host *shost = class_to_shost(dev);
4081 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4082 uint32_t app_hndl;
4083
4084 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4085
4086 return snprintf(buf, 8, "%u\n", app_hndl);
4087 }
4088
4089
4090 /**
4091 * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4092 * @dev : device object representation for the scsi device
4093 * @attr : device attribute to show
4094 * @buf : buffer to send data to
4095 *
4096 * Display the logical drive number for the device in question, if it a valid
4097 * logical drive. For physical devices, "-1" is returned.
4098 *
4099 * The logical drive number is displayed in following format:
4100 *
4101 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4102 *
4103 * <int> <int> <int> <int>
4104 */
4105 static ssize_t
4106 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
4107 {
4108 struct scsi_device *sdev = to_scsi_device(dev);
4109 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4110 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4111 int scsi_id = -1;
4112 int logical_drv = -1;
4113 int ldid_map = -1;
4114 uint32_t app_hndl = 0;
4115 int mapped_sdev_id;
4116 int rval;
4117 int i;
4118
4119 if (raid_dev->random_del_supported &&
4120 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4121
4122 rval = megaraid_sysfs_get_ldmap(adapter);
4123 if (rval == 0) {
4124
4125 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4126
4127 mapped_sdev_id = sdev->id;
4128
4129 if (sdev->id > adapter->init_id) {
4130 mapped_sdev_id -= 1;
4131 }
4132
4133 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4134
4135 scsi_id = sdev->id;
4136
4137 logical_drv = i;
4138
4139 ldid_map = raid_dev->curr_ldmap[i];
4140
4141 app_hndl = mraid_mm_adapter_app_handle(
4142 adapter->unique_id);
4143
4144 break;
4145 }
4146 }
4147 }
4148 else {
4149 con_log(CL_ANN, (KERN_NOTICE
4150 "megaraid: sysfs get ld map failed: %x\n",
4151 rval));
4152 }
4153 }
4154
4155 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4156 ldid_map, app_hndl);
4157 }
4158
4159
4160 /*
4161 * END: Mailbox Low Level Driver
4162 */
4163 module_init(megaraid_init);
4164 module_exit(megaraid_exit);
4165
4166 /* vim: set ts=8 sw=8 tw=78 ai si: */
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