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