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Force reset on decompression error
[linux-2.6/tcp-comp.git] / drivers / scsi / megaraid / megaraid_mbox.c
blobc6a53dccc16a84d52b6aa3d041630a57421a58ee
1 /*
2 *
3 * Linux MegaRAID device driver
4 *
5 * Copyright (c) 2003-2004 LSI Logic Corporation.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 *
12 * FILE : megaraid_mbox.c
13 * Version : v2.20.5.1 (Nov 16 2006)
14 *
15 * Authors:
16 * Atul Mukker <Atul.Mukker@lsi.com>
17 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com>
18 * Manoj Jose <Manoj.Jose@lsi.com>
19 * Seokmann Ju
20 *
21 * List of supported controllers
22 *
23 * OEM Product Name VID DID SSVID SSID
24 * --- ------------ --- --- ---- ----
25 * Dell PERC3/QC 101E 1960 1028 0471
26 * Dell PERC3/DC 101E 1960 1028 0493
27 * Dell PERC3/SC 101E 1960 1028 0475
28 * Dell PERC3/Di 1028 1960 1028 0123
29 * Dell PERC4/SC 1000 1960 1028 0520
30 * Dell PERC4/DC 1000 1960 1028 0518
31 * Dell PERC4/QC 1000 0407 1028 0531
32 * Dell PERC4/Di 1028 000F 1028 014A
33 * Dell PERC 4e/Si 1028 0013 1028 016c
34 * Dell PERC 4e/Di 1028 0013 1028 016d
35 * Dell PERC 4e/Di 1028 0013 1028 016e
36 * Dell PERC 4e/Di 1028 0013 1028 016f
37 * Dell PERC 4e/Di 1028 0013 1028 0170
38 * Dell PERC 4e/DC 1000 0408 1028 0002
39 * Dell PERC 4e/SC 1000 0408 1028 0001
40 *
41 *
42 * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520
43 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520
44 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518
45 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530
46 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532
47 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531
48 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001
49 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002
50 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523
51 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523
52 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004
53 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008
54 *
55 * INTEL RAID Controller SRCU42X 1000 0407 8086 0532
56 * INTEL RAID Controller SRCS16 1000 1960 8086 0523
57 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002
58 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530
59 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008
60 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431
61 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499
62 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520
63 *
64 * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065
65 *
66 * ACER MegaRAID ROMB-2E 1000 0408 1025 004D
67 *
68 * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287
69 *
70 * For history of changes, see Documentation/ChangeLog.megaraid
71 */
72
73 #include "megaraid_mbox.h"
74
75 static int megaraid_init(void);
76 static void megaraid_exit(void);
77
78 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
79 static void megaraid_detach_one(struct pci_dev *);
80 static void megaraid_mbox_shutdown(struct pci_dev *);
81
82 static int megaraid_io_attach(adapter_t *);
83 static void megaraid_io_detach(adapter_t *);
84
85 static int megaraid_init_mbox(adapter_t *);
86 static void megaraid_fini_mbox(adapter_t *);
87
88 static int megaraid_alloc_cmd_packets(adapter_t *);
89 static void megaraid_free_cmd_packets(adapter_t *);
90
91 static int megaraid_mbox_setup_dma_pools(adapter_t *);
92 static void megaraid_mbox_teardown_dma_pools(adapter_t *);
93
94 static int megaraid_sysfs_alloc_resources(adapter_t *);
95 static void megaraid_sysfs_free_resources(adapter_t *);
96
97 static int megaraid_abort_handler(struct scsi_cmnd *);
98 static int megaraid_reset_handler(struct scsi_cmnd *);
99
100 static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
101 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
102 static int megaraid_busywait_mbox(mraid_device_t *);
103 static int megaraid_mbox_product_info(adapter_t *);
104 static int megaraid_mbox_extended_cdb(adapter_t *);
105 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
106 static int megaraid_mbox_support_random_del(adapter_t *);
107 static int megaraid_mbox_get_max_sg(adapter_t *);
108 static void megaraid_mbox_enum_raid_scsi(adapter_t *);
109 static void megaraid_mbox_flush_cache(adapter_t *);
110 static int megaraid_mbox_fire_sync_cmd(adapter_t *);
111
112 static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
113 static void megaraid_mbox_setup_device_map(adapter_t *);
114
115 static int megaraid_queue_command(struct scsi_cmnd *,
116 void (*)(struct scsi_cmnd *));
117 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
118 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
119 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
120 struct scsi_cmnd *);
121 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
122 struct scsi_cmnd *);
123
124 static irqreturn_t megaraid_isr(int, void *);
125
126 static void megaraid_mbox_dpc(unsigned long);
127
128 static ssize_t megaraid_sysfs_show_app_hndl(struct class_device *, 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_g = {
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 CLASS_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 class_device_attribute *megaraid_shost_attrs[] = {
321 &class_device_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 *
339 * Return value:
340 * actual depth set
341 */
342 static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth)
343 {
344 if (qdepth > MBOX_MAX_SCSI_CMDS)
345 qdepth = MBOX_MAX_SCSI_CMDS;
346 scsi_adjust_queue_depth(sdev, 0, qdepth);
347 return sdev->queue_depth;
348 }
349
350 /*
351 * Scsi host template for megaraid unified driver
352 */
353 static struct scsi_host_template megaraid_template_g = {
354 .module = THIS_MODULE,
355 .name = "LSI Logic MegaRAID driver",
356 .proc_name = "megaraid",
357 .queuecommand = megaraid_queue_command,
358 .eh_abort_handler = megaraid_abort_handler,
359 .eh_device_reset_handler = megaraid_reset_handler,
360 .eh_bus_reset_handler = megaraid_reset_handler,
361 .eh_host_reset_handler = megaraid_reset_handler,
362 .change_queue_depth = megaraid_change_queue_depth,
363 .use_clustering = ENABLE_CLUSTERING,
364 .sdev_attrs = megaraid_sdev_attrs,
365 .shost_attrs = megaraid_shost_attrs,
366 };
367
368
369 /**
370 * megaraid_init - module load hook
371 *
372 * We register ourselves as hotplug enabled module and let PCI subsystem
373 * discover our adapters.
374 */
375 static int __init
376 megaraid_init(void)
377 {
378 int rval;
379
380 // Announce the driver version
381 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
382 MEGARAID_EXT_VERSION));
383
384 // check validity of module parameters
385 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
386
387 con_log(CL_ANN, (KERN_WARNING
388 "megaraid mailbox: max commands per lun reset to %d\n",
389 MBOX_MAX_SCSI_CMDS));
390
391 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
392 }
393
394
395 // register as a PCI hot-plug driver module
396 rval = pci_register_driver(&megaraid_pci_driver_g);
397 if (rval < 0) {
398 con_log(CL_ANN, (KERN_WARNING
399 "megaraid: could not register hotplug support.\n"));
400 }
401
402 return rval;
403 }
404
405
406 /**
407 * megaraid_exit - driver unload entry point
408 *
409 * We simply unwrap the megaraid_init routine here.
410 */
411 static void __exit
412 megaraid_exit(void)
413 {
414 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
415
416 // unregister as PCI hotplug driver
417 pci_unregister_driver(&megaraid_pci_driver_g);
418
419 return;
420 }
421
422
423 /**
424 * megaraid_probe_one - PCI hotplug entry point
425 * @pdev : handle to this controller's PCI configuration space
426 * @id : pci device id of the class of controllers
427 *
428 * This routine should be called whenever a new adapter is detected by the
429 * PCI hotplug susbsytem.
430 */
431 static int __devinit
432 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
433 {
434 adapter_t *adapter;
435
436
437 // detected a new controller
438 con_log(CL_ANN, (KERN_INFO
439 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
440 pdev->vendor, pdev->device, pdev->subsystem_vendor,
441 pdev->subsystem_device));
442
443 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
444 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
445
446 if (pci_enable_device(pdev)) {
447 con_log(CL_ANN, (KERN_WARNING
448 "megaraid: pci_enable_device failed\n"));
449
450 return -ENODEV;
451 }
452
453 // Enable bus-mastering on this controller
454 pci_set_master(pdev);
455
456 // Allocate the per driver initialization structure
457 adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL);
458
459 if (adapter == NULL) {
460 con_log(CL_ANN, (KERN_WARNING
461 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__));
462
463 goto out_probe_one;
464 }
465
466
467 // set up PCI related soft state and other pre-known parameters
468 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn;
469 adapter->irq = pdev->irq;
470 adapter->pdev = pdev;
471
472 atomic_set(&adapter->being_detached, 0);
473
474 // Setup the default DMA mask. This would be changed later on
475 // depending on hardware capabilities
476 if (pci_set_dma_mask(adapter->pdev, DMA_32BIT_MASK) != 0) {
477
478 con_log(CL_ANN, (KERN_WARNING
479 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
480
481 goto out_free_adapter;
482 }
483
484
485 // Initialize the synchronization lock for kernel and LLD
486 spin_lock_init(&adapter->lock);
487
488 // Initialize the command queues: the list of free SCBs and the list
489 // of pending SCBs.
490 INIT_LIST_HEAD(&adapter->kscb_pool);
491 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
492
493 INIT_LIST_HEAD(&adapter->pend_list);
494 spin_lock_init(PENDING_LIST_LOCK(adapter));
495
496 INIT_LIST_HEAD(&adapter->completed_list);
497 spin_lock_init(COMPLETED_LIST_LOCK(adapter));
498
499
500 // Start the mailbox based controller
501 if (megaraid_init_mbox(adapter) != 0) {
502 con_log(CL_ANN, (KERN_WARNING
503 "megaraid: maibox adapter did not initialize\n"));
504
505 goto out_free_adapter;
506 }
507
508 // Register with LSI Common Management Module
509 if (megaraid_cmm_register(adapter) != 0) {
510
511 con_log(CL_ANN, (KERN_WARNING
512 "megaraid: could not register with management module\n"));
513
514 goto out_fini_mbox;
515 }
516
517 // setup adapter handle in PCI soft state
518 pci_set_drvdata(pdev, adapter);
519
520 // attach with scsi mid-layer
521 if (megaraid_io_attach(adapter) != 0) {
522
523 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
524
525 goto out_cmm_unreg;
526 }
527
528 return 0;
529
530 out_cmm_unreg:
531 pci_set_drvdata(pdev, NULL);
532 megaraid_cmm_unregister(adapter);
533 out_fini_mbox:
534 megaraid_fini_mbox(adapter);
535 out_free_adapter:
536 kfree(adapter);
537 out_probe_one:
538 pci_disable_device(pdev);
539
540 return -ENODEV;
541 }
542
543
544 /**
545 * megaraid_detach_one - release framework resources and call LLD release routine
546 * @pdev : handle for our PCI cofiguration space
547 *
548 * This routine is called during driver unload. We free all the allocated
549 * resources and call the corresponding LLD so that it can also release all
550 * its resources.
551 *
552 * This routine is also called from the PCI hotplug system.
553 */
554 static void
555 megaraid_detach_one(struct pci_dev *pdev)
556 {
557 adapter_t *adapter;
558 struct Scsi_Host *host;
559
560
561 // Start a rollback on this adapter
562 adapter = pci_get_drvdata(pdev);
563
564 if (!adapter) {
565 con_log(CL_ANN, (KERN_CRIT
566 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
567 pdev->vendor, pdev->device, pdev->subsystem_vendor,
568 pdev->subsystem_device));
569
570 return;
571 }
572 else {
573 con_log(CL_ANN, (KERN_NOTICE
574 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
575 pdev->vendor, pdev->device, pdev->subsystem_vendor,
576 pdev->subsystem_device));
577 }
578
579
580 host = adapter->host;
581
582 // do not allow any more requests from the management module for this
583 // adapter.
584 // FIXME: How do we account for the request which might still be
585 // pending with us?
586 atomic_set(&adapter->being_detached, 1);
587
588 // detach from the IO sub-system
589 megaraid_io_detach(adapter);
590
591 // reset the device state in the PCI structure. We check this
592 // condition when we enter here. If the device state is NULL,
593 // that would mean the device has already been removed
594 pci_set_drvdata(pdev, NULL);
595
596 // Unregister from common management module
597 //
598 // FIXME: this must return success or failure for conditions if there
599 // is a command pending with LLD or not.
600 megaraid_cmm_unregister(adapter);
601
602 // finalize the mailbox based controller and release all resources
603 megaraid_fini_mbox(adapter);
604
605 kfree(adapter);
606
607 scsi_host_put(host);
608
609 pci_disable_device(pdev);
610
611 return;
612 }
613
614
615 /**
616 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
617 * @pdev : generic driver model device
618 *
619 * Shutdown notification, perform flush cache.
620 */
621 static void
622 megaraid_mbox_shutdown(struct pci_dev *pdev)
623 {
624 adapter_t *adapter = pci_get_drvdata(pdev);
625 static int counter;
626
627 if (!adapter) {
628 con_log(CL_ANN, (KERN_WARNING
629 "megaraid: null device in shutdown\n"));
630 return;
631 }
632
633 // flush caches now
634 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
635 counter++));
636
637 megaraid_mbox_flush_cache(adapter);
638
639 con_log(CL_ANN, ("done\n"));
640 }
641
642
643 /**
644 * megaraid_io_attach - attach a device with the IO subsystem
645 * @adapter : controller's soft state
646 *
647 * Attach this device with the IO subsystem.
648 */
649 static int
650 megaraid_io_attach(adapter_t *adapter)
651 {
652 struct Scsi_Host *host;
653
654 // Initialize SCSI Host structure
655 host = scsi_host_alloc(&megaraid_template_g, 8);
656 if (!host) {
657 con_log(CL_ANN, (KERN_WARNING
658 "megaraid mbox: scsi_register failed\n"));
659
660 return -1;
661 }
662
663 SCSIHOST2ADAP(host) = (caddr_t)adapter;
664 adapter->host = host;
665
666 host->irq = adapter->irq;
667 host->unique_id = adapter->unique_id;
668 host->can_queue = adapter->max_cmds;
669 host->this_id = adapter->init_id;
670 host->sg_tablesize = adapter->sglen;
671 host->max_sectors = adapter->max_sectors;
672 host->cmd_per_lun = adapter->cmd_per_lun;
673 host->max_channel = adapter->max_channel;
674 host->max_id = adapter->max_target;
675 host->max_lun = adapter->max_lun;
676
677
678 // notify mid-layer about the new controller
679 if (scsi_add_host(host, &adapter->pdev->dev)) {
680
681 con_log(CL_ANN, (KERN_WARNING
682 "megaraid mbox: scsi_add_host failed\n"));
683
684 scsi_host_put(host);
685
686 return -1;
687 }
688
689 scsi_scan_host(host);
690
691 return 0;
692 }
693
694
695 /**
696 * megaraid_io_detach - detach a device from the IO subsystem
697 * @adapter : controller's soft state
698 *
699 * Detach this device from the IO subsystem.
700 */
701 static void
702 megaraid_io_detach(adapter_t *adapter)
703 {
704 struct Scsi_Host *host;
705
706 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
707
708 host = adapter->host;
709
710 scsi_remove_host(host);
711
712 return;
713 }
714
715
716 /*
717 * START: Mailbox Low Level Driver
718 *
719 * This is section specific to the single mailbox based controllers
720 */
721
722 /**
723 * megaraid_init_mbox - initialize controller
724 * @adapter : our soft state
725 *
726 * - Allocate 16-byte aligned mailbox memory for firmware handshake
727 * - Allocate controller's memory resources
728 * - Find out all initialization data
729 * - Allocate memory required for all the commands
730 * - Use internal library of FW routines, build up complete soft state
731 */
732 static int __devinit
733 megaraid_init_mbox(adapter_t *adapter)
734 {
735 struct pci_dev *pdev;
736 mraid_device_t *raid_dev;
737 int i;
738 uint32_t magic64;
739
740
741 adapter->ito = MBOX_TIMEOUT;
742 pdev = adapter->pdev;
743
744 /*
745 * Allocate and initialize the init data structure for mailbox
746 * controllers
747 */
748 raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL);
749 if (raid_dev == NULL) return -1;
750
751
752 /*
753 * Attach the adapter soft state to raid device soft state
754 */
755 adapter->raid_device = (caddr_t)raid_dev;
756 raid_dev->fast_load = megaraid_fast_load;
757
758
759 // our baseport
760 raid_dev->baseport = pci_resource_start(pdev, 0);
761
762 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
763
764 con_log(CL_ANN, (KERN_WARNING
765 "megaraid: mem region busy\n"));
766
767 goto out_free_raid_dev;
768 }
769
770 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
771
772 if (!raid_dev->baseaddr) {
773
774 con_log(CL_ANN, (KERN_WARNING
775 "megaraid: could not map hba memory\n") );
776
777 goto out_release_regions;
778 }
779
780 /* initialize the mutual exclusion lock for the mailbox */
781 spin_lock_init(&raid_dev->mailbox_lock);
782
783 /* allocate memory required for commands */
784 if (megaraid_alloc_cmd_packets(adapter) != 0)
785 goto out_iounmap;
786
787 /*
788 * Issue SYNC cmd to flush the pending cmds in the adapter
789 * and initialize its internal state
790 */
791
792 if (megaraid_mbox_fire_sync_cmd(adapter))
793 con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
794
795 /*
796 * Setup the rest of the soft state using the library of
797 * FW routines
798 */
799
800 /* request IRQ and register the interrupt service routine */
801 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
802 adapter)) {
803
804 con_log(CL_ANN, (KERN_WARNING
805 "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
806 goto out_alloc_cmds;
807
808 }
809
810 // Product info
811 if (megaraid_mbox_product_info(adapter) != 0)
812 goto out_free_irq;
813
814 // Do we support extended CDBs
815 adapter->max_cdb_sz = 10;
816 if (megaraid_mbox_extended_cdb(adapter) == 0) {
817 adapter->max_cdb_sz = 16;
818 }
819
820 /*
821 * Do we support cluster environment, if we do, what is the initiator
822 * id.
823 * NOTE: In a non-cluster aware firmware environment, the LLD should
824 * return 7 as initiator id.
825 */
826 adapter->ha = 0;
827 adapter->init_id = -1;
828 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
829 adapter->ha = 1;
830 }
831
832 /*
833 * Prepare the device ids array to have the mapping between the kernel
834 * device address and megaraid device address.
835 * We export the physical devices on their actual addresses. The
836 * logical drives are exported on a virtual SCSI channel
837 */
838 megaraid_mbox_setup_device_map(adapter);
839
840 // If the firmware supports random deletion, update the device id map
841 if (megaraid_mbox_support_random_del(adapter)) {
842
843 // Change the logical drives numbers in device_ids array one
844 // slot in device_ids is reserved for target id, that's why
845 // "<=" below
846 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
847 adapter->device_ids[adapter->max_channel][i] += 0x80;
848 }
849 adapter->device_ids[adapter->max_channel][adapter->init_id] =
850 0xFF;
851
852 raid_dev->random_del_supported = 1;
853 }
854
855 /*
856 * find out the maximum number of scatter-gather elements supported by
857 * this firmware
858 */
859 adapter->sglen = megaraid_mbox_get_max_sg(adapter);
860
861 // enumerate RAID and SCSI channels so that all devices on SCSI
862 // channels can later be exported, including disk devices
863 megaraid_mbox_enum_raid_scsi(adapter);
864
865 /*
866 * Other parameters required by upper layer
867 *
868 * maximum number of sectors per IO command
869 */
870 adapter->max_sectors = megaraid_max_sectors;
871
872 /*
873 * number of queued commands per LUN.
874 */
875 adapter->cmd_per_lun = megaraid_cmd_per_lun;
876
877 /*
878 * Allocate resources required to issue FW calls, when sysfs is
879 * accessed
880 */
881 if (megaraid_sysfs_alloc_resources(adapter) != 0)
882 goto out_free_irq;
883
884 // Set the DMA mask to 64-bit. All supported controllers as capable of
885 // DMA in this range
886 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
887
888 if (((magic64 == HBA_SIGNATURE_64_BIT) &&
889 ((adapter->pdev->subsystem_device !=
890 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
891 (adapter->pdev->subsystem_device !=
892 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
893 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
894 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
895 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
896 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
897 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
898 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
899 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
900 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
901 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
902 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
903 if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK)) {
904 con_log(CL_ANN, (KERN_WARNING
905 "megaraid: DMA mask for 64-bit failed\n"));
906
907 if (pci_set_dma_mask (adapter->pdev, DMA_32BIT_MASK)) {
908 con_log(CL_ANN, (KERN_WARNING
909 "megaraid: 32-bit DMA mask failed\n"));
910 goto out_free_sysfs_res;
911 }
912 }
913 }
914
915 // setup tasklet for DPC
916 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
917 (unsigned long)adapter);
918
919 con_log(CL_DLEVEL1, (KERN_INFO
920 "megaraid mbox hba successfully initialized\n"));
921
922 return 0;
923
924 out_free_sysfs_res:
925 megaraid_sysfs_free_resources(adapter);
926 out_free_irq:
927 free_irq(adapter->irq, adapter);
928 out_alloc_cmds:
929 megaraid_free_cmd_packets(adapter);
930 out_iounmap:
931 iounmap(raid_dev->baseaddr);
932 out_release_regions:
933 pci_release_regions(pdev);
934 out_free_raid_dev:
935 kfree(raid_dev);
936
937 return -1;
938 }
939
940
941 /**
942 * megaraid_fini_mbox - undo controller initialization
943 * @adapter : our soft state
944 */
945 static void
946 megaraid_fini_mbox(adapter_t *adapter)
947 {
948 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
949
950 // flush all caches
951 megaraid_mbox_flush_cache(adapter);
952
953 tasklet_kill(&adapter->dpc_h);
954
955 megaraid_sysfs_free_resources(adapter);
956
957 megaraid_free_cmd_packets(adapter);
958
959 free_irq(adapter->irq, adapter);
960
961 iounmap(raid_dev->baseaddr);
962
963 pci_release_regions(adapter->pdev);
964
965 kfree(raid_dev);
966
967 return;
968 }
969
970
971 /**
972 * megaraid_alloc_cmd_packets - allocate shared mailbox
973 * @adapter : soft state of the raid controller
974 *
975 * Allocate and align the shared mailbox. This maibox is used to issue
976 * all the commands. For IO based controllers, the mailbox is also regsitered
977 * with the FW. Allocate memory for all commands as well.
978 * This is our big allocator.
979 */
980 static int
981 megaraid_alloc_cmd_packets(adapter_t *adapter)
982 {
983 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
984 struct pci_dev *pdev;
985 unsigned long align;
986 scb_t *scb;
987 mbox_ccb_t *ccb;
988 struct mraid_pci_blk *epthru_pci_blk;
989 struct mraid_pci_blk *sg_pci_blk;
990 struct mraid_pci_blk *mbox_pci_blk;
991 int i;
992
993 pdev = adapter->pdev;
994
995 /*
996 * Setup the mailbox
997 * Allocate the common 16-byte aligned memory for the handshake
998 * mailbox.
999 */
1000 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
1001 sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
1002
1003 if (!raid_dev->una_mbox64) {
1004 con_log(CL_ANN, (KERN_WARNING
1005 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1006 __LINE__));
1007 return -1;
1008 }
1009 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
1010
1011 /*
1012 * Align the mailbox at 16-byte boundary
1013 */
1014 raid_dev->mbox = &raid_dev->una_mbox64->mbox32;
1015
1016 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
1017 (~0UL ^ 0xFUL));
1018
1019 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
1020
1021 align = ((void *)raid_dev->mbox -
1022 ((void *)&raid_dev->una_mbox64->mbox32));
1023
1024 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1025 align;
1026
1027 // Allocate memory for commands issued internally
1028 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
1029 &adapter->ibuf_dma_h);
1030 if (!adapter->ibuf) {
1031
1032 con_log(CL_ANN, (KERN_WARNING
1033 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1034 __LINE__));
1035
1036 goto out_free_common_mbox;
1037 }
1038 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
1039
1040 // Allocate memory for our SCSI Command Blocks and their associated
1041 // memory
1042
1043 /*
1044 * Allocate memory for the base list of scb. Later allocate memory for
1045 * CCBs and embedded components of each CCB and point the pointers in
1046 * scb to the allocated components
1047 * NOTE: The code to allocate SCB will be duplicated in all the LLD
1048 * since the calling routine does not yet know the number of available
1049 * commands.
1050 */
1051 adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL);
1052
1053 if (adapter->kscb_list == NULL) {
1054 con_log(CL_ANN, (KERN_WARNING
1055 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1056 __LINE__));
1057 goto out_free_ibuf;
1058 }
1059
1060 // memory allocation for our command packets
1061 if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1062 con_log(CL_ANN, (KERN_WARNING
1063 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1064 __LINE__));
1065 goto out_free_scb_list;
1066 }
1067
1068 // Adjust the scb pointers and link in the free pool
1069 epthru_pci_blk = raid_dev->epthru_pool;
1070 sg_pci_blk = raid_dev->sg_pool;
1071 mbox_pci_blk = raid_dev->mbox_pool;
1072
1073 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1074 scb = adapter->kscb_list + i;
1075 ccb = raid_dev->ccb_list + i;
1076
1077 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1078 ccb->raw_mbox = (uint8_t *)ccb->mbox;
1079 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1080 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1081
1082 // make sure the mailbox is aligned properly
1083 if (ccb->mbox_dma_h & 0x0F) {
1084 con_log(CL_ANN, (KERN_CRIT
1085 "megaraid mbox: not aligned on 16-bytes\n"));
1086
1087 goto out_teardown_dma_pools;
1088 }
1089
1090 ccb->epthru = (mraid_epassthru_t *)
1091 epthru_pci_blk[i].vaddr;
1092 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr;
1093 ccb->pthru = (mraid_passthru_t *)ccb->epthru;
1094 ccb->pthru_dma_h = ccb->epthru_dma_h;
1095
1096
1097 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1098 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr;
1099 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64;
1100
1101 scb->ccb = (caddr_t)ccb;
1102 scb->gp = 0;
1103
1104 scb->sno = i; // command index
1105
1106 scb->scp = NULL;
1107 scb->state = SCB_FREE;
1108 scb->dma_direction = PCI_DMA_NONE;
1109 scb->dma_type = MRAID_DMA_NONE;
1110 scb->dev_channel = -1;
1111 scb->dev_target = -1;
1112
1113 // put scb in the free pool
1114 list_add_tail(&scb->list, &adapter->kscb_pool);
1115 }
1116
1117 return 0;
1118
1119 out_teardown_dma_pools:
1120 megaraid_mbox_teardown_dma_pools(adapter);
1121 out_free_scb_list:
1122 kfree(adapter->kscb_list);
1123 out_free_ibuf:
1124 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1125 adapter->ibuf_dma_h);
1126 out_free_common_mbox:
1127 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1128 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1129
1130 return -1;
1131 }
1132
1133
1134 /**
1135 * megaraid_free_cmd_packets - free memory
1136 * @adapter : soft state of the raid controller
1137 *
1138 * Release memory resources allocated for commands.
1139 */
1140 static void
1141 megaraid_free_cmd_packets(adapter_t *adapter)
1142 {
1143 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1144
1145 megaraid_mbox_teardown_dma_pools(adapter);
1146
1147 kfree(adapter->kscb_list);
1148
1149 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1150 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1151
1152 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1153 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1154 return;
1155 }
1156
1157
1158 /**
1159 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1160 * @adapter : HBA soft state
1161 *
1162 * Setup the dma pools for mailbox, passthru and extended passthru structures,
1163 * and scatter-gather lists.
1164 */
1165 static int
1166 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1167 {
1168 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1169 struct mraid_pci_blk *epthru_pci_blk;
1170 struct mraid_pci_blk *sg_pci_blk;
1171 struct mraid_pci_blk *mbox_pci_blk;
1172 int i;
1173
1174
1175
1176 // Allocate memory for 16-bytes aligned mailboxes
1177 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1178 adapter->pdev,
1179 sizeof(mbox64_t) + 16,
1180 16, 0);
1181
1182 if (raid_dev->mbox_pool_handle == NULL) {
1183 goto fail_setup_dma_pool;
1184 }
1185
1186 mbox_pci_blk = raid_dev->mbox_pool;
1187 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1188 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1189 raid_dev->mbox_pool_handle,
1190 GFP_KERNEL,
1191 &mbox_pci_blk[i].dma_addr);
1192 if (!mbox_pci_blk[i].vaddr) {
1193 goto fail_setup_dma_pool;
1194 }
1195 }
1196
1197 /*
1198 * Allocate memory for each embedded passthru strucuture pointer
1199 * Request for a 128 bytes aligned structure for each passthru command
1200 * structure
1201 * Since passthru and extended passthru commands are exclusive, they
1202 * share common memory pool. Passthru structures piggyback on memory
1203 * allocted to extended passthru since passthru is smaller of the two
1204 */
1205 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1206 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1207
1208 if (raid_dev->epthru_pool_handle == NULL) {
1209 goto fail_setup_dma_pool;
1210 }
1211
1212 epthru_pci_blk = raid_dev->epthru_pool;
1213 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1214 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1215 raid_dev->epthru_pool_handle,
1216 GFP_KERNEL,
1217 &epthru_pci_blk[i].dma_addr);
1218 if (!epthru_pci_blk[i].vaddr) {
1219 goto fail_setup_dma_pool;
1220 }
1221 }
1222
1223
1224 // Allocate memory for each scatter-gather list. Request for 512 bytes
1225 // alignment for each sg list
1226 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1227 adapter->pdev,
1228 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1229 512, 0);
1230
1231 if (raid_dev->sg_pool_handle == NULL) {
1232 goto fail_setup_dma_pool;
1233 }
1234
1235 sg_pci_blk = raid_dev->sg_pool;
1236 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1237 sg_pci_blk[i].vaddr = pci_pool_alloc(
1238 raid_dev->sg_pool_handle,
1239 GFP_KERNEL,
1240 &sg_pci_blk[i].dma_addr);
1241 if (!sg_pci_blk[i].vaddr) {
1242 goto fail_setup_dma_pool;
1243 }
1244 }
1245
1246 return 0;
1247
1248 fail_setup_dma_pool:
1249 megaraid_mbox_teardown_dma_pools(adapter);
1250 return -1;
1251 }
1252
1253
1254 /**
1255 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1256 * @adapter : HBA soft state
1257 *
1258 * Teardown the dma pool for mailbox, passthru and extended passthru
1259 * structures, and scatter-gather lists.
1260 */
1261 static void
1262 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1263 {
1264 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1265 struct mraid_pci_blk *epthru_pci_blk;
1266 struct mraid_pci_blk *sg_pci_blk;
1267 struct mraid_pci_blk *mbox_pci_blk;
1268 int i;
1269
1270
1271 sg_pci_blk = raid_dev->sg_pool;
1272 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1273 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1274 sg_pci_blk[i].dma_addr);
1275 }
1276 if (raid_dev->sg_pool_handle)
1277 pci_pool_destroy(raid_dev->sg_pool_handle);
1278
1279
1280 epthru_pci_blk = raid_dev->epthru_pool;
1281 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1282 pci_pool_free(raid_dev->epthru_pool_handle,
1283 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1284 }
1285 if (raid_dev->epthru_pool_handle)
1286 pci_pool_destroy(raid_dev->epthru_pool_handle);
1287
1288
1289 mbox_pci_blk = raid_dev->mbox_pool;
1290 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1291 pci_pool_free(raid_dev->mbox_pool_handle,
1292 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1293 }
1294 if (raid_dev->mbox_pool_handle)
1295 pci_pool_destroy(raid_dev->mbox_pool_handle);
1296
1297 return;
1298 }
1299
1300
1301 /**
1302 * megaraid_alloc_scb - detach and return a scb from the free list
1303 * @adapter : controller's soft state
1304 * @scp : pointer to the scsi command to be executed
1305 *
1306 * Return the scb from the head of the free list. %NULL if there are none
1307 * available.
1308 */
1309 static scb_t *
1310 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1311 {
1312 struct list_head *head = &adapter->kscb_pool;
1313 scb_t *scb = NULL;
1314 unsigned long flags;
1315
1316 // detach scb from free pool
1317 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1318
1319 if (list_empty(head)) {
1320 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1321 return NULL;
1322 }
1323
1324 scb = list_entry(head->next, scb_t, list);
1325 list_del_init(&scb->list);
1326
1327 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1328
1329 scb->state = SCB_ACTIVE;
1330 scb->scp = scp;
1331 scb->dma_type = MRAID_DMA_NONE;
1332
1333 return scb;
1334 }
1335
1336
1337 /**
1338 * megaraid_dealloc_scb - return the scb to the free pool
1339 * @adapter : controller's soft state
1340 * @scb : scb to be freed
1341 *
1342 * Return the scb back to the free list of scbs. The caller must 'flush' the
1343 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1344 * NOTE NOTE: Make sure the scb is not on any list before calling this
1345 * routine.
1346 */
1347 static inline void
1348 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1349 {
1350 unsigned long flags;
1351
1352 // put scb in the free pool
1353 scb->state = SCB_FREE;
1354 scb->scp = NULL;
1355 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1356
1357 list_add(&scb->list, &adapter->kscb_pool);
1358
1359 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1360
1361 return;
1362 }
1363
1364
1365 /**
1366 * megaraid_mbox_mksgl - make the scatter-gather list
1367 * @adapter : controller's soft state
1368 * @scb : scsi control block
1369 *
1370 * Prepare the scatter-gather list.
1371 */
1372 static int
1373 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1374 {
1375 struct scatterlist *sgl;
1376 mbox_ccb_t *ccb;
1377 struct scsi_cmnd *scp;
1378 int sgcnt;
1379 int i;
1380
1381
1382 scp = scb->scp;
1383 ccb = (mbox_ccb_t *)scb->ccb;
1384
1385 sgcnt = scsi_dma_map(scp);
1386 BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen);
1387
1388 // no mapping required if no data to be transferred
1389 if (!sgcnt)
1390 return 0;
1391
1392 scb->dma_type = MRAID_DMA_WSG;
1393
1394 scsi_for_each_sg(scp, sgl, sgcnt, i) {
1395 ccb->sgl64[i].address = sg_dma_address(sgl);
1396 ccb->sgl64[i].length = sg_dma_len(sgl);
1397 }
1398
1399 // Return count of SG nodes
1400 return sgcnt;
1401 }
1402
1403
1404 /**
1405 * mbox_post_cmd - issue a mailbox command
1406 * @adapter : controller's soft state
1407 * @scb : command to be issued
1408 *
1409 * Post the command to the controller if mailbox is available.
1410 */
1411 static int
1412 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1413 {
1414 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1415 mbox64_t *mbox64;
1416 mbox_t *mbox;
1417 mbox_ccb_t *ccb;
1418 unsigned long flags;
1419 unsigned int i = 0;
1420
1421
1422 ccb = (mbox_ccb_t *)scb->ccb;
1423 mbox = raid_dev->mbox;
1424 mbox64 = raid_dev->mbox64;
1425
1426 /*
1427 * Check for busy mailbox. If it is, return failure - the caller
1428 * should retry later.
1429 */
1430 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1431
1432 if (unlikely(mbox->busy)) {
1433 do {
1434 udelay(1);
1435 i++;
1436 rmb();
1437 } while(mbox->busy && (i < max_mbox_busy_wait));
1438
1439 if (mbox->busy) {
1440
1441 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1442
1443 return -1;
1444 }
1445 }
1446
1447
1448 // Copy this command's mailbox data into "adapter's" mailbox
1449 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1450 mbox->cmdid = scb->sno;
1451
1452 adapter->outstanding_cmds++;
1453
1454 if (scb->dma_direction == PCI_DMA_TODEVICE)
1455 pci_dma_sync_sg_for_device(adapter->pdev,
1456 scsi_sglist(scb->scp),
1457 scsi_sg_count(scb->scp),
1458 PCI_DMA_TODEVICE);
1459
1460 mbox->busy = 1; // Set busy
1461 mbox->poll = 0;
1462 mbox->ack = 0;
1463 wmb();
1464
1465 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1466
1467 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1468
1469 return 0;
1470 }
1471
1472
1473 /**
1474 * megaraid_queue_command - generic queue entry point for all LLDs
1475 * @scp : pointer to the scsi command to be executed
1476 * @done : callback routine to be called after the cmd has be completed
1477 *
1478 * Queue entry point for mailbox based controllers.
1479 */
1480 static int
1481 megaraid_queue_command(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *))
1482 {
1483 adapter_t *adapter;
1484 scb_t *scb;
1485 int if_busy;
1486
1487 adapter = SCP2ADAPTER(scp);
1488 scp->scsi_done = done;
1489 scp->result = 0;
1490
1491 /*
1492 * Allocate and build a SCB request
1493 * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1494 * not allocate scb. We will return non-zero status in that case.
1495 * NOTE: scb can be null even though certain commands completed
1496 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1497 * return 0 in that case, and we would do the callback right away.
1498 */
1499 if_busy = 0;
1500 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1501 if (!scb) { // command already completed
1502 done(scp);
1503 return 0;
1504 }
1505
1506 megaraid_mbox_runpendq(adapter, scb);
1507 return if_busy;
1508 }
1509
1510 /**
1511 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
1512 * @adapter : controller's soft state
1513 * @scp : mid-layer scsi command pointer
1514 * @busy : set if request could not be completed because of lack of
1515 * resources
1516 *
1517 * Transform the mid-layer scsi command to megaraid firmware lingua.
1518 * Convert the command issued by mid-layer to format understood by megaraid
1519 * firmware. We also complete certain commands without sending them to firmware.
1520 */
1521 static scb_t *
1522 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1523 {
1524 mraid_device_t *rdev = ADAP2RAIDDEV(adapter);
1525 int channel;
1526 int target;
1527 int islogical;
1528 mbox_ccb_t *ccb;
1529 mraid_passthru_t *pthru;
1530 mbox64_t *mbox64;
1531 mbox_t *mbox;
1532 scb_t *scb;
1533 char skip[] = "skipping";
1534 char scan[] = "scanning";
1535 char *ss;
1536
1537
1538 /*
1539 * Get the appropriate device map for the device this command is
1540 * intended for
1541 */
1542 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1543
1544 /*
1545 * Logical drive commands
1546 */
1547 if (islogical) {
1548 switch (scp->cmnd[0]) {
1549 case TEST_UNIT_READY:
1550 /*
1551 * Do we support clustering and is the support enabled
1552 * If no, return success always
1553 */
1554 if (!adapter->ha) {
1555 scp->result = (DID_OK << 16);
1556 return NULL;
1557 }
1558
1559 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1560 scp->result = (DID_ERROR << 16);
1561 *busy = 1;
1562 return NULL;
1563 }
1564
1565 scb->dma_direction = scp->sc_data_direction;
1566 scb->dev_channel = 0xFF;
1567 scb->dev_target = target;
1568 ccb = (mbox_ccb_t *)scb->ccb;
1569
1570 /*
1571 * The command id will be provided by the command
1572 * issuance routine
1573 */
1574 ccb->raw_mbox[0] = CLUSTER_CMD;
1575 ccb->raw_mbox[2] = RESERVATION_STATUS;
1576 ccb->raw_mbox[3] = target;
1577
1578 return scb;
1579
1580 case MODE_SENSE:
1581 {
1582 struct scatterlist *sgl;
1583 caddr_t vaddr;
1584
1585 sgl = scsi_sglist(scp);
1586 if (sgl->page) {
1587 vaddr = (caddr_t)
1588 (page_address((&sgl[0])->page)
1589 + (&sgl[0])->offset);
1590
1591 memset(vaddr, 0, scp->cmnd[4]);
1592 }
1593 else {
1594 con_log(CL_ANN, (KERN_WARNING
1595 "megaraid mailbox: invalid sg:%d\n",
1596 __LINE__));
1597 }
1598 }
1599 scp->result = (DID_OK << 16);
1600 return NULL;
1601
1602 case INQUIRY:
1603 /*
1604 * Display the channel scan for logical drives
1605 * Do not display scan for a channel if already done.
1606 */
1607 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1608
1609 con_log(CL_ANN, (KERN_INFO
1610 "scsi[%d]: scanning scsi channel %d",
1611 adapter->host->host_no,
1612 SCP2CHANNEL(scp)));
1613
1614 con_log(CL_ANN, (
1615 " [virtual] for logical drives\n"));
1616
1617 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1618 }
1619
1620 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1621 scp->sense_buffer[0] = 0x70;
1622 scp->sense_buffer[2] = ILLEGAL_REQUEST;
1623 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB;
1624 scp->result = CHECK_CONDITION << 1;
1625 return NULL;
1626 }
1627
1628 /* Fall through */
1629
1630 case READ_CAPACITY:
1631 /*
1632 * Do not allow LUN > 0 for logical drives and
1633 * requests for more than 40 logical drives
1634 */
1635 if (SCP2LUN(scp)) {
1636 scp->result = (DID_BAD_TARGET << 16);
1637 return NULL;
1638 }
1639 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1640 scp->result = (DID_BAD_TARGET << 16);
1641 return NULL;
1642 }
1643
1644
1645 /* Allocate a SCB and initialize passthru */
1646 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1647 scp->result = (DID_ERROR << 16);
1648 *busy = 1;
1649 return NULL;
1650 }
1651
1652 ccb = (mbox_ccb_t *)scb->ccb;
1653 scb->dev_channel = 0xFF;
1654 scb->dev_target = target;
1655 pthru = ccb->pthru;
1656 mbox = ccb->mbox;
1657 mbox64 = ccb->mbox64;
1658
1659 pthru->timeout = 0;
1660 pthru->ars = 1;
1661 pthru->reqsenselen = 14;
1662 pthru->islogical = 1;
1663 pthru->logdrv = target;
1664 pthru->cdblen = scp->cmd_len;
1665 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1666
1667 mbox->cmd = MBOXCMD_PASSTHRU64;
1668 scb->dma_direction = scp->sc_data_direction;
1669
1670 pthru->dataxferlen = scsi_bufflen(scp);
1671 pthru->dataxferaddr = ccb->sgl_dma_h;
1672 pthru->numsge = megaraid_mbox_mksgl(adapter,
1673 scb);
1674
1675 mbox->xferaddr = 0xFFFFFFFF;
1676 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h;
1677 mbox64->xferaddr_hi = 0;
1678
1679 return scb;
1680
1681 case READ_6:
1682 case WRITE_6:
1683 case READ_10:
1684 case WRITE_10:
1685 case READ_12:
1686 case WRITE_12:
1687
1688 /*
1689 * Allocate a SCB and initialize mailbox
1690 */
1691 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1692 scp->result = (DID_ERROR << 16);
1693 *busy = 1;
1694 return NULL;
1695 }
1696 ccb = (mbox_ccb_t *)scb->ccb;
1697 scb->dev_channel = 0xFF;
1698 scb->dev_target = target;
1699 mbox = ccb->mbox;
1700 mbox64 = ccb->mbox64;
1701 mbox->logdrv = target;
1702
1703 /*
1704 * A little HACK: 2nd bit is zero for all scsi read
1705 * commands and is set for all scsi write commands
1706 */
1707 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64:
1708 MBOXCMD_LREAD64 ;
1709
1710 /*
1711 * 6-byte READ(0x08) or WRITE(0x0A) cdb
1712 */
1713 if (scp->cmd_len == 6) {
1714 mbox->numsectors = (uint32_t)scp->cmnd[4];
1715 mbox->lba =
1716 ((uint32_t)scp->cmnd[1] << 16) |
1717 ((uint32_t)scp->cmnd[2] << 8) |
1718 (uint32_t)scp->cmnd[3];
1719
1720 mbox->lba &= 0x1FFFFF;
1721 }
1722
1723 /*
1724 * 10-byte READ(0x28) or WRITE(0x2A) cdb
1725 */
1726 else if (scp->cmd_len == 10) {
1727 mbox->numsectors =
1728 (uint32_t)scp->cmnd[8] |
1729 ((uint32_t)scp->cmnd[7] << 8);
1730 mbox->lba =
1731 ((uint32_t)scp->cmnd[2] << 24) |
1732 ((uint32_t)scp->cmnd[3] << 16) |
1733 ((uint32_t)scp->cmnd[4] << 8) |
1734 (uint32_t)scp->cmnd[5];
1735 }
1736
1737 /*
1738 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1739 */
1740 else if (scp->cmd_len == 12) {
1741 mbox->lba =
1742 ((uint32_t)scp->cmnd[2] << 24) |
1743 ((uint32_t)scp->cmnd[3] << 16) |
1744 ((uint32_t)scp->cmnd[4] << 8) |
1745 (uint32_t)scp->cmnd[5];
1746
1747 mbox->numsectors =
1748 ((uint32_t)scp->cmnd[6] << 24) |
1749 ((uint32_t)scp->cmnd[7] << 16) |
1750 ((uint32_t)scp->cmnd[8] << 8) |
1751 (uint32_t)scp->cmnd[9];
1752 }
1753 else {
1754 con_log(CL_ANN, (KERN_WARNING
1755 "megaraid: unsupported CDB length\n"));
1756
1757 megaraid_dealloc_scb(adapter, scb);
1758
1759 scp->result = (DID_ERROR << 16);
1760 return NULL;
1761 }
1762
1763 scb->dma_direction = scp->sc_data_direction;
1764
1765 // Calculate Scatter-Gather info
1766 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h;
1767 mbox->numsge = megaraid_mbox_mksgl(adapter,
1768 scb);
1769 mbox->xferaddr = 0xFFFFFFFF;
1770 mbox64->xferaddr_hi = 0;
1771
1772 return scb;
1773
1774 case RESERVE:
1775 case RELEASE:
1776 /*
1777 * Do we support clustering and is the support enabled
1778 */
1779 if (!adapter->ha) {
1780 scp->result = (DID_BAD_TARGET << 16);
1781 return NULL;
1782 }
1783
1784 /*
1785 * Allocate a SCB and initialize mailbox
1786 */
1787 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1788 scp->result = (DID_ERROR << 16);
1789 *busy = 1;
1790 return NULL;
1791 }
1792
1793 ccb = (mbox_ccb_t *)scb->ccb;
1794 scb->dev_channel = 0xFF;
1795 scb->dev_target = target;
1796 ccb->raw_mbox[0] = CLUSTER_CMD;
1797 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ?
1798 RESERVE_LD : RELEASE_LD;
1799
1800 ccb->raw_mbox[3] = target;
1801 scb->dma_direction = scp->sc_data_direction;
1802
1803 return scb;
1804
1805 default:
1806 scp->result = (DID_BAD_TARGET << 16);
1807 return NULL;
1808 }
1809 }
1810 else { // Passthru device commands
1811
1812 // Do not allow access to target id > 15 or LUN > 7
1813 if (target > 15 || SCP2LUN(scp) > 7) {
1814 scp->result = (DID_BAD_TARGET << 16);
1815 return NULL;
1816 }
1817
1818 // if fast load option was set and scan for last device is
1819 // over, reset the fast_load flag so that during a possible
1820 // next scan, devices can be made available
1821 if (rdev->fast_load && (target == 15) &&
1822 (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1823
1824 con_log(CL_ANN, (KERN_INFO
1825 "megaraid[%d]: physical device scan re-enabled\n",
1826 adapter->host->host_no));
1827 rdev->fast_load = 0;
1828 }
1829
1830 /*
1831 * Display the channel scan for physical devices
1832 */
1833 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1834
1835 ss = rdev->fast_load ? skip : scan;
1836
1837 con_log(CL_ANN, (KERN_INFO
1838 "scsi[%d]: %s scsi channel %d [Phy %d]",
1839 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1840 channel));
1841
1842 con_log(CL_ANN, (
1843 " for non-raid devices\n"));
1844
1845 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1846 }
1847
1848 // disable channel sweep if fast load option given
1849 if (rdev->fast_load) {
1850 scp->result = (DID_BAD_TARGET << 16);
1851 return NULL;
1852 }
1853
1854 // Allocate a SCB and initialize passthru
1855 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1856 scp->result = (DID_ERROR << 16);
1857 *busy = 1;
1858 return NULL;
1859 }
1860
1861 ccb = (mbox_ccb_t *)scb->ccb;
1862 scb->dev_channel = channel;
1863 scb->dev_target = target;
1864 scb->dma_direction = scp->sc_data_direction;
1865 mbox = ccb->mbox;
1866 mbox64 = ccb->mbox64;
1867
1868 // Does this firmware support extended CDBs
1869 if (adapter->max_cdb_sz == 16) {
1870 mbox->cmd = MBOXCMD_EXTPTHRU;
1871
1872 megaraid_mbox_prepare_epthru(adapter, scb, scp);
1873
1874 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h;
1875 mbox64->xferaddr_hi = 0;
1876 mbox->xferaddr = 0xFFFFFFFF;
1877 }
1878 else {
1879 mbox->cmd = MBOXCMD_PASSTHRU64;
1880
1881 megaraid_mbox_prepare_pthru(adapter, scb, scp);
1882
1883 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h;
1884 mbox64->xferaddr_hi = 0;
1885 mbox->xferaddr = 0xFFFFFFFF;
1886 }
1887 return scb;
1888 }
1889
1890 // NOT REACHED
1891 }
1892
1893
1894 /**
1895 * megaraid_mbox_runpendq - execute commands queued in the pending queue
1896 * @adapter : controller's soft state
1897 * @scb_q : SCB to be queued in the pending list
1898 *
1899 * Scan the pending list for commands which are not yet issued and try to
1900 * post to the controller. The SCB can be a null pointer, which would indicate
1901 * no SCB to be queue, just try to execute the ones in the pending list.
1902 *
1903 * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1904 * out from the head of the pending list. If it is successfully issued, the
1905 * next SCB is at the head now.
1906 */
1907 static void
1908 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1909 {
1910 scb_t *scb;
1911 unsigned long flags;
1912
1913 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1914
1915 if (scb_q) {
1916 scb_q->state = SCB_PENDQ;
1917 list_add_tail(&scb_q->list, &adapter->pend_list);
1918 }
1919
1920 // if the adapter in not in quiescent mode, post the commands to FW
1921 if (adapter->quiescent) {
1922 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1923 return;
1924 }
1925
1926 while (!list_empty(&adapter->pend_list)) {
1927
1928 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1929
1930 scb = list_entry(adapter->pend_list.next, scb_t, list);
1931
1932 // remove the scb from the pending list and try to
1933 // issue. If we are unable to issue it, put back in
1934 // the pending list and return
1935
1936 list_del_init(&scb->list);
1937
1938 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1939
1940 // if mailbox was busy, return SCB back to pending
1941 // list. Make sure to add at the head, since that's
1942 // where it would have been removed from
1943
1944 scb->state = SCB_ISSUED;
1945
1946 if (mbox_post_cmd(adapter, scb) != 0) {
1947
1948 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1949
1950 scb->state = SCB_PENDQ;
1951
1952 list_add(&scb->list, &adapter->pend_list);
1953
1954 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1955 flags);
1956
1957 return;
1958 }
1959
1960 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1961 }
1962
1963 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1964
1965
1966 return;
1967 }
1968
1969
1970 /**
1971 * megaraid_mbox_prepare_pthru - prepare a command for physical devices
1972 * @adapter : pointer to controller's soft state
1973 * @scb : scsi control block
1974 * @scp : scsi command from the mid-layer
1975 *
1976 * Prepare a command for the scsi physical devices.
1977 */
1978 static void
1979 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1980 struct scsi_cmnd *scp)
1981 {
1982 mbox_ccb_t *ccb;
1983 mraid_passthru_t *pthru;
1984 uint8_t channel;
1985 uint8_t target;
1986
1987 ccb = (mbox_ccb_t *)scb->ccb;
1988 pthru = ccb->pthru;
1989 channel = scb->dev_channel;
1990 target = scb->dev_target;
1991
1992 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1993 pthru->timeout = 4;
1994 pthru->ars = 1;
1995 pthru->islogical = 0;
1996 pthru->channel = 0;
1997 pthru->target = (channel << 4) | target;
1998 pthru->logdrv = SCP2LUN(scp);
1999 pthru->reqsenselen = 14;
2000 pthru->cdblen = scp->cmd_len;
2001
2002 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2003
2004 if (scsi_bufflen(scp)) {
2005 pthru->dataxferlen = scsi_bufflen(scp);
2006 pthru->dataxferaddr = ccb->sgl_dma_h;
2007 pthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2008 }
2009 else {
2010 pthru->dataxferaddr = 0;
2011 pthru->dataxferlen = 0;
2012 pthru->numsge = 0;
2013 }
2014 return;
2015 }
2016
2017
2018 /**
2019 * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2020 * @adapter : pointer to controller's soft state
2021 * @scb : scsi control block
2022 * @scp : scsi command from the mid-layer
2023 *
2024 * Prepare a command for the scsi physical devices. This rountine prepares
2025 * commands for devices which can take extended CDBs (>10 bytes).
2026 */
2027 static void
2028 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2029 struct scsi_cmnd *scp)
2030 {
2031 mbox_ccb_t *ccb;
2032 mraid_epassthru_t *epthru;
2033 uint8_t channel;
2034 uint8_t target;
2035
2036 ccb = (mbox_ccb_t *)scb->ccb;
2037 epthru = ccb->epthru;
2038 channel = scb->dev_channel;
2039 target = scb->dev_target;
2040
2041 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2042 epthru->timeout = 4;
2043 epthru->ars = 1;
2044 epthru->islogical = 0;
2045 epthru->channel = 0;
2046 epthru->target = (channel << 4) | target;
2047 epthru->logdrv = SCP2LUN(scp);
2048 epthru->reqsenselen = 14;
2049 epthru->cdblen = scp->cmd_len;
2050
2051 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2052
2053 if (scsi_bufflen(scp)) {
2054 epthru->dataxferlen = scsi_bufflen(scp);
2055 epthru->dataxferaddr = ccb->sgl_dma_h;
2056 epthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2057 }
2058 else {
2059 epthru->dataxferaddr = 0;
2060 epthru->dataxferlen = 0;
2061 epthru->numsge = 0;
2062 }
2063 return;
2064 }
2065
2066
2067 /**
2068 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2069 * @adapter : controller's soft state
2070 *
2071 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
2072 * completed command and put them on the completed list for later processing.
2073 *
2074 * Returns: 1 if the interrupt is valid, 0 otherwise
2075 */
2076 static int
2077 megaraid_ack_sequence(adapter_t *adapter)
2078 {
2079 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2080 mbox_t *mbox;
2081 scb_t *scb;
2082 uint8_t nstatus;
2083 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS];
2084 struct list_head clist;
2085 int handled;
2086 uint32_t dword;
2087 unsigned long flags;
2088 int i, j;
2089
2090
2091 mbox = raid_dev->mbox;
2092
2093 // move the SCBs from the firmware completed array to our local list
2094 INIT_LIST_HEAD(&clist);
2095
2096 // loop till F/W has more commands for us to complete
2097 handled = 0;
2098 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2099 do {
2100 /*
2101 * Check if a valid interrupt is pending. If found, force the
2102 * interrupt line low.
2103 */
2104 dword = RDOUTDOOR(raid_dev);
2105 if (dword != 0x10001234) break;
2106
2107 handled = 1;
2108
2109 WROUTDOOR(raid_dev, 0x10001234);
2110
2111 nstatus = 0;
2112 // wait for valid numstatus to post
2113 for (i = 0; i < 0xFFFFF; i++) {
2114 if (mbox->numstatus != 0xFF) {
2115 nstatus = mbox->numstatus;
2116 break;
2117 }
2118 rmb();
2119 }
2120 mbox->numstatus = 0xFF;
2121
2122 adapter->outstanding_cmds -= nstatus;
2123
2124 for (i = 0; i < nstatus; i++) {
2125
2126 // wait for valid command index to post
2127 for (j = 0; j < 0xFFFFF; j++) {
2128 if (mbox->completed[i] != 0xFF) break;
2129 rmb();
2130 }
2131 completed[i] = mbox->completed[i];
2132 mbox->completed[i] = 0xFF;
2133
2134 if (completed[i] == 0xFF) {
2135 con_log(CL_ANN, (KERN_CRIT
2136 "megaraid: command posting timed out\n"));
2137
2138 BUG();
2139 continue;
2140 }
2141
2142 // Get SCB associated with this command id
2143 if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2144 // a cmm command
2145 scb = adapter->uscb_list + (completed[i] -
2146 MBOX_MAX_SCSI_CMDS);
2147 }
2148 else {
2149 // an os command
2150 scb = adapter->kscb_list + completed[i];
2151 }
2152
2153 scb->status = mbox->status;
2154 list_add_tail(&scb->list, &clist);
2155 }
2156
2157 // Acknowledge interrupt
2158 WRINDOOR(raid_dev, 0x02);
2159
2160 } while(1);
2161
2162 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2163
2164
2165 // put the completed commands in the completed list. DPC would
2166 // complete these commands later
2167 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2168
2169 list_splice(&clist, &adapter->completed_list);
2170
2171 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2172
2173
2174 // schedule the DPC if there is some work for it
2175 if (handled)
2176 tasklet_schedule(&adapter->dpc_h);
2177
2178 return handled;
2179 }
2180
2181
2182 /**
2183 * megaraid_isr - isr for memory based mailbox based controllers
2184 * @irq : irq
2185 * @devp : pointer to our soft state
2186 *
2187 * Interrupt service routine for memory-mapped mailbox controllers.
2188 */
2189 static irqreturn_t
2190 megaraid_isr(int irq, void *devp)
2191 {
2192 adapter_t *adapter = devp;
2193 int handled;
2194
2195 handled = megaraid_ack_sequence(adapter);
2196
2197 /* Loop through any pending requests */
2198 if (!adapter->quiescent) {
2199 megaraid_mbox_runpendq(adapter, NULL);
2200 }
2201
2202 return IRQ_RETVAL(handled);
2203 }
2204
2205
2206 /**
2207 * megaraid_mbox_sync_scb - sync kernel buffers
2208 * @adapter : controller's soft state
2209 * @scb : pointer to the resource packet
2210 *
2211 * DMA sync if required.
2212 */
2213 static void
2214 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2215 {
2216 mbox_ccb_t *ccb;
2217
2218 ccb = (mbox_ccb_t *)scb->ccb;
2219
2220 if (scb->dma_direction == PCI_DMA_FROMDEVICE)
2221 pci_dma_sync_sg_for_cpu(adapter->pdev,
2222 scsi_sglist(scb->scp),
2223 scsi_sg_count(scb->scp),
2224 PCI_DMA_FROMDEVICE);
2225
2226 scsi_dma_unmap(scb->scp);
2227 return;
2228 }
2229
2230
2231 /**
2232 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2233 * @devp : pointer to HBA soft state
2234 *
2235 * Pick up the commands from the completed list and send back to the owners.
2236 * This is a reentrant function and does not assume any locks are held while
2237 * it is being called.
2238 */
2239 static void
2240 megaraid_mbox_dpc(unsigned long devp)
2241 {
2242 adapter_t *adapter = (adapter_t *)devp;
2243 mraid_device_t *raid_dev;
2244 struct list_head clist;
2245 struct scatterlist *sgl;
2246 scb_t *scb;
2247 scb_t *tmp;
2248 struct scsi_cmnd *scp;
2249 mraid_passthru_t *pthru;
2250 mraid_epassthru_t *epthru;
2251 mbox_ccb_t *ccb;
2252 int islogical;
2253 int pdev_index;
2254 int pdev_state;
2255 mbox_t *mbox;
2256 unsigned long flags;
2257 uint8_t c;
2258 int status;
2259 uioc_t *kioc;
2260
2261
2262 if (!adapter) return;
2263
2264 raid_dev = ADAP2RAIDDEV(adapter);
2265
2266 // move the SCBs from the completed list to our local list
2267 INIT_LIST_HEAD(&clist);
2268
2269 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2270
2271 list_splice_init(&adapter->completed_list, &clist);
2272
2273 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2274
2275
2276 list_for_each_entry_safe(scb, tmp, &clist, list) {
2277
2278 status = scb->status;
2279 scp = scb->scp;
2280 ccb = (mbox_ccb_t *)scb->ccb;
2281 pthru = ccb->pthru;
2282 epthru = ccb->epthru;
2283 mbox = ccb->mbox;
2284
2285 // Make sure f/w has completed a valid command
2286 if (scb->state != SCB_ISSUED) {
2287 con_log(CL_ANN, (KERN_CRIT
2288 "megaraid critical err: invalid command %d:%d:%p\n",
2289 scb->sno, scb->state, scp));
2290 BUG();
2291 continue; // Must never happen!
2292 }
2293
2294 // check for the management command and complete it right away
2295 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2296 scb->state = SCB_FREE;
2297 scb->status = status;
2298
2299 // remove from local clist
2300 list_del_init(&scb->list);
2301
2302 kioc = (uioc_t *)scb->gp;
2303 kioc->status = 0;
2304
2305 megaraid_mbox_mm_done(adapter, scb);
2306
2307 continue;
2308 }
2309
2310 // Was an abort issued for this command earlier
2311 if (scb->state & SCB_ABORT) {
2312 con_log(CL_ANN, (KERN_NOTICE
2313 "megaraid: aborted cmd %lx[%x] completed\n",
2314 scp->serial_number, scb->sno));
2315 }
2316
2317 /*
2318 * If the inquiry came of a disk drive which is not part of
2319 * any RAID array, expose it to the kernel. For this to be
2320 * enabled, user must set the "megaraid_expose_unconf_disks"
2321 * flag to 1 by specifying it on module parameter list.
2322 * This would enable data migration off drives from other
2323 * configurations.
2324 */
2325 islogical = MRAID_IS_LOGICAL(adapter, scp);
2326 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2327 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2328
2329 sgl = scsi_sglist(scp);
2330 if (sgl->page) {
2331 c = *(unsigned char *)
2332 (page_address((&sgl[0])->page) +
2333 (&sgl[0])->offset);
2334 } else {
2335 con_log(CL_ANN, (KERN_WARNING
2336 "megaraid mailbox: invalid sg:%d\n",
2337 __LINE__));
2338 c = 0;
2339 }
2340
2341 if ((c & 0x1F ) == TYPE_DISK) {
2342 pdev_index = (scb->dev_channel * 16) +
2343 scb->dev_target;
2344 pdev_state =
2345 raid_dev->pdrv_state[pdev_index] & 0x0F;
2346
2347 if (pdev_state == PDRV_ONLINE ||
2348 pdev_state == PDRV_FAILED ||
2349 pdev_state == PDRV_RBLD ||
2350 pdev_state == PDRV_HOTSPARE ||
2351 megaraid_expose_unconf_disks == 0) {
2352
2353 status = 0xF0;
2354 }
2355 }
2356 }
2357
2358 // Convert MegaRAID status to Linux error code
2359 switch (status) {
2360
2361 case 0x00:
2362
2363 scp->result = (DID_OK << 16);
2364 break;
2365
2366 case 0x02:
2367
2368 /* set sense_buffer and result fields */
2369 if (mbox->cmd == MBOXCMD_PASSTHRU ||
2370 mbox->cmd == MBOXCMD_PASSTHRU64) {
2371
2372 memcpy(scp->sense_buffer, pthru->reqsensearea,
2373 14);
2374
2375 scp->result = DRIVER_SENSE << 24 |
2376 DID_OK << 16 | CHECK_CONDITION << 1;
2377 }
2378 else {
2379 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2380
2381 memcpy(scp->sense_buffer,
2382 epthru->reqsensearea, 14);
2383
2384 scp->result = DRIVER_SENSE << 24 |
2385 DID_OK << 16 |
2386 CHECK_CONDITION << 1;
2387 } else {
2388 scp->sense_buffer[0] = 0x70;
2389 scp->sense_buffer[2] = ABORTED_COMMAND;
2390 scp->result = CHECK_CONDITION << 1;
2391 }
2392 }
2393 break;
2394
2395 case 0x08:
2396
2397 scp->result = DID_BUS_BUSY << 16 | status;
2398 break;
2399
2400 default:
2401
2402 /*
2403 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2404 * failed
2405 */
2406 if (scp->cmnd[0] == TEST_UNIT_READY) {
2407 scp->result = DID_ERROR << 16 |
2408 RESERVATION_CONFLICT << 1;
2409 }
2410 else
2411 /*
2412 * Error code returned is 1 if Reserve or Release
2413 * failed or the input parameter is invalid
2414 */
2415 if (status == 1 && (scp->cmnd[0] == RESERVE ||
2416 scp->cmnd[0] == RELEASE)) {
2417
2418 scp->result = DID_ERROR << 16 |
2419 RESERVATION_CONFLICT << 1;
2420 }
2421 else {
2422 scp->result = DID_BAD_TARGET << 16 | status;
2423 }
2424 }
2425
2426 // print a debug message for all failed commands
2427 if (status) {
2428 megaraid_mbox_display_scb(adapter, scb);
2429 }
2430
2431 // Free our internal resources and call the mid-layer callback
2432 // routine
2433 megaraid_mbox_sync_scb(adapter, scb);
2434
2435 // remove from local clist
2436 list_del_init(&scb->list);
2437
2438 // put back in free list
2439 megaraid_dealloc_scb(adapter, scb);
2440
2441 // send the scsi packet back to kernel
2442 scp->scsi_done(scp);
2443 }
2444
2445 return;
2446 }
2447
2448
2449 /**
2450 * megaraid_abort_handler - abort the scsi command
2451 * @scp : command to be aborted
2452 *
2453 * Abort a previous SCSI request. Only commands on the pending list can be
2454 * aborted. All the commands issued to the F/W must complete.
2455 **/
2456 static int
2457 megaraid_abort_handler(struct scsi_cmnd *scp)
2458 {
2459 adapter_t *adapter;
2460 mraid_device_t *raid_dev;
2461 scb_t *scb;
2462 scb_t *tmp;
2463 int found;
2464 unsigned long flags;
2465 int i;
2466
2467
2468 adapter = SCP2ADAPTER(scp);
2469 raid_dev = ADAP2RAIDDEV(adapter);
2470
2471 con_log(CL_ANN, (KERN_WARNING
2472 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2473 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2474 SCP2TARGET(scp), SCP2LUN(scp)));
2475
2476 // If FW has stopped responding, simply return failure
2477 if (raid_dev->hw_error) {
2478 con_log(CL_ANN, (KERN_NOTICE
2479 "megaraid: hw error, not aborting\n"));
2480 return FAILED;
2481 }
2482
2483 // There might a race here, where the command was completed by the
2484 // firmware and now it is on the completed list. Before we could
2485 // complete the command to the kernel in dpc, the abort came.
2486 // Find out if this is the case to avoid the race.
2487 scb = NULL;
2488 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2489 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2490
2491 if (scb->scp == scp) { // Found command
2492
2493 list_del_init(&scb->list); // from completed list
2494
2495 con_log(CL_ANN, (KERN_WARNING
2496 "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2497 scp->serial_number, scb->sno,
2498 scb->dev_channel, scb->dev_target));
2499
2500 scp->result = (DID_ABORT << 16);
2501 scp->scsi_done(scp);
2502
2503 megaraid_dealloc_scb(adapter, scb);
2504
2505 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2506 flags);
2507
2508 return SUCCESS;
2509 }
2510 }
2511 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2512
2513
2514 // Find out if this command is still on the pending list. If it is and
2515 // was never issued, abort and return success. If the command is owned
2516 // by the firmware, we must wait for it to complete by the FW.
2517 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2518 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2519
2520 if (scb->scp == scp) { // Found command
2521
2522 list_del_init(&scb->list); // from pending list
2523
2524 ASSERT(!(scb->state & SCB_ISSUED));
2525
2526 con_log(CL_ANN, (KERN_WARNING
2527 "megaraid abort: %ld[%d:%d], driver owner\n",
2528 scp->serial_number, scb->dev_channel,
2529 scb->dev_target));
2530
2531 scp->result = (DID_ABORT << 16);
2532 scp->scsi_done(scp);
2533
2534 megaraid_dealloc_scb(adapter, scb);
2535
2536 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2537 flags);
2538
2539 return SUCCESS;
2540 }
2541 }
2542 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2543
2544
2545 // Check do we even own this command, in which case this would be
2546 // owned by the firmware. The only way to locate the FW scb is to
2547 // traverse through the list of all SCB, since driver does not
2548 // maintain these SCBs on any list
2549 found = 0;
2550 spin_lock_irq(&adapter->lock);
2551 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2552 scb = adapter->kscb_list + i;
2553
2554 if (scb->scp == scp) {
2555
2556 found = 1;
2557
2558 if (!(scb->state & SCB_ISSUED)) {
2559 con_log(CL_ANN, (KERN_WARNING
2560 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2561 scp->serial_number, scb->sno, scb->dev_channel,
2562 scb->dev_target));
2563 BUG();
2564 }
2565 else {
2566 con_log(CL_ANN, (KERN_WARNING
2567 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2568 scp->serial_number, scb->sno, scb->dev_channel,
2569 scb->dev_target));
2570 }
2571 }
2572 }
2573 spin_unlock_irq(&adapter->lock);
2574
2575 if (!found) {
2576 con_log(CL_ANN, (KERN_WARNING
2577 "megaraid abort: scsi cmd:%ld, do now own\n",
2578 scp->serial_number));
2579
2580 // FIXME: Should there be a callback for this command?
2581 return SUCCESS;
2582 }
2583
2584 // We cannot actually abort a command owned by firmware, return
2585 // failure and wait for reset. In host reset handler, we will find out
2586 // if the HBA is still live
2587 return FAILED;
2588 }
2589
2590 /**
2591 * megaraid_reset_handler - device reset hadler for mailbox based driver
2592 * @scp : reference command
2593 *
2594 * Reset handler for the mailbox based controller. First try to find out if
2595 * the FW is still live, in which case the outstanding commands counter mut go
2596 * down to 0. If that happens, also issue the reservation reset command to
2597 * relinquish (possible) reservations on the logical drives connected to this
2598 * host.
2599 **/
2600 static int
2601 megaraid_reset_handler(struct scsi_cmnd *scp)
2602 {
2603 adapter_t *adapter;
2604 scb_t *scb;
2605 scb_t *tmp;
2606 mraid_device_t *raid_dev;
2607 unsigned long flags;
2608 uint8_t raw_mbox[sizeof(mbox_t)];
2609 int rval;
2610 int recovery_window;
2611 int recovering;
2612 int i;
2613 uioc_t *kioc;
2614
2615 adapter = SCP2ADAPTER(scp);
2616 raid_dev = ADAP2RAIDDEV(adapter);
2617
2618 // return failure if adapter is not responding
2619 if (raid_dev->hw_error) {
2620 con_log(CL_ANN, (KERN_NOTICE
2621 "megaraid: hw error, cannot reset\n"));
2622 return FAILED;
2623 }
2624
2625
2626 // Under exceptional conditions, FW can take up to 3 minutes to
2627 // complete command processing. Wait for additional 2 minutes for the
2628 // pending commands counter to go down to 0. If it doesn't, let the
2629 // controller be marked offline
2630 // Also, reset all the commands currently owned by the driver
2631 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2632 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2633 list_del_init(&scb->list); // from pending list
2634
2635 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2636 con_log(CL_ANN, (KERN_WARNING
2637 "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2638 scb->sno, scb->dev_channel, scb->dev_target));
2639
2640 scb->status = -1;
2641
2642 kioc = (uioc_t *)scb->gp;
2643 kioc->status = -EFAULT;
2644
2645 megaraid_mbox_mm_done(adapter, scb);
2646 } else {
2647 if (scb->scp == scp) { // Found command
2648 con_log(CL_ANN, (KERN_WARNING
2649 "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2650 scp->serial_number, scb->sno,
2651 scb->dev_channel, scb->dev_target));
2652 } else {
2653 con_log(CL_ANN, (KERN_WARNING
2654 "megaraid: IO packet with %d[%d:%d] being reset\n",
2655 scb->sno, scb->dev_channel, scb->dev_target));
2656 }
2657
2658 scb->scp->result = (DID_RESET << 16);
2659 scb->scp->scsi_done(scb->scp);
2660
2661 megaraid_dealloc_scb(adapter, scb);
2662 }
2663 }
2664 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2665
2666 if (adapter->outstanding_cmds) {
2667 con_log(CL_ANN, (KERN_NOTICE
2668 "megaraid: %d outstanding commands. Max wait %d sec\n",
2669 adapter->outstanding_cmds,
2670 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
2671 }
2672
2673 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2674
2675 recovering = adapter->outstanding_cmds;
2676
2677 for (i = 0; i < recovery_window; i++) {
2678
2679 megaraid_ack_sequence(adapter);
2680
2681 // print a message once every 5 seconds only
2682 if (!(i % 5)) {
2683 con_log(CL_ANN, (
2684 "megaraid mbox: Wait for %d commands to complete:%d\n",
2685 adapter->outstanding_cmds,
2686 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
2687 }
2688
2689 // bailout if no recovery happended in reset time
2690 if (adapter->outstanding_cmds == 0) {
2691 break;
2692 }
2693
2694 msleep(1000);
2695 }
2696
2697 spin_lock(&adapter->lock);
2698
2699 // If still outstanding commands, bail out
2700 if (adapter->outstanding_cmds) {
2701 con_log(CL_ANN, (KERN_WARNING
2702 "megaraid mbox: critical hardware error!\n"));
2703
2704 raid_dev->hw_error = 1;
2705
2706 rval = FAILED;
2707 goto out;
2708 }
2709 else {
2710 con_log(CL_ANN, (KERN_NOTICE
2711 "megaraid mbox: reset sequence completed sucessfully\n"));
2712 }
2713
2714
2715 // If the controller supports clustering, reset reservations
2716 if (!adapter->ha) {
2717 rval = SUCCESS;
2718 goto out;
2719 }
2720
2721 // clear reservations if any
2722 raw_mbox[0] = CLUSTER_CMD;
2723 raw_mbox[2] = RESET_RESERVATIONS;
2724
2725 rval = SUCCESS;
2726 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2727 con_log(CL_ANN,
2728 (KERN_INFO "megaraid: reservation reset\n"));
2729 }
2730 else {
2731 rval = FAILED;
2732 con_log(CL_ANN, (KERN_WARNING
2733 "megaraid: reservation reset failed\n"));
2734 }
2735
2736 out:
2737 spin_unlock_irq(&adapter->lock);
2738 return rval;
2739 }
2740
2741 /*
2742 * START: internal commands library
2743 *
2744 * This section of the driver has the common routine used by the driver and
2745 * also has all the FW routines
2746 */
2747
2748 /**
2749 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2750 * @adapter : controller's soft state
2751 * @raw_mbox : the mailbox
2752 *
2753 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2754 * controllers.
2755 */
2756 static int
2757 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2758 {
2759 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2760 mbox64_t *mbox64;
2761 mbox_t *mbox;
2762 uint8_t status;
2763 int i;
2764
2765
2766 mbox64 = raid_dev->mbox64;
2767 mbox = raid_dev->mbox;
2768
2769 /*
2770 * Wait until mailbox is free
2771 */
2772 if (megaraid_busywait_mbox(raid_dev) != 0)
2773 goto blocked_mailbox;
2774
2775 /*
2776 * Copy mailbox data into host structure
2777 */
2778 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2779 mbox->cmdid = 0xFE;
2780 mbox->busy = 1;
2781 mbox->poll = 0;
2782 mbox->ack = 0;
2783 mbox->numstatus = 0xFF;
2784 mbox->status = 0xFF;
2785
2786 wmb();
2787 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2788
2789 // wait for maximum 1 second for status to post. If the status is not
2790 // available within 1 second, assume FW is initializing and wait
2791 // for an extended amount of time
2792 if (mbox->numstatus == 0xFF) { // status not yet available
2793 udelay(25);
2794
2795 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2796 rmb();
2797 msleep(1);
2798 }
2799
2800
2801 if (i == 1000) {
2802 con_log(CL_ANN, (KERN_NOTICE
2803 "megaraid mailbox: wait for FW to boot "));
2804
2805 for (i = 0; (mbox->numstatus == 0xFF) &&
2806 (i < MBOX_RESET_WAIT); i++) {
2807 rmb();
2808 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2809 MBOX_RESET_WAIT - i));
2810 msleep(1000);
2811 }
2812
2813 if (i == MBOX_RESET_WAIT) {
2814
2815 con_log(CL_ANN, (
2816 "\nmegaraid mailbox: status not available\n"));
2817
2818 return -1;
2819 }
2820 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2821 }
2822 }
2823
2824 // wait for maximum 1 second for poll semaphore
2825 if (mbox->poll != 0x77) {
2826 udelay(25);
2827
2828 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2829 rmb();
2830 msleep(1);
2831 }
2832
2833 if (i == 1000) {
2834 con_log(CL_ANN, (KERN_WARNING
2835 "megaraid mailbox: could not get poll semaphore\n"));
2836 return -1;
2837 }
2838 }
2839
2840 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2841 wmb();
2842
2843 // wait for maximum 1 second for acknowledgement
2844 if (RDINDOOR(raid_dev) & 0x2) {
2845 udelay(25);
2846
2847 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2848 rmb();
2849 msleep(1);
2850 }
2851
2852 if (i == 1000) {
2853 con_log(CL_ANN, (KERN_WARNING
2854 "megaraid mailbox: could not acknowledge\n"));
2855 return -1;
2856 }
2857 }
2858 mbox->poll = 0;
2859 mbox->ack = 0x77;
2860
2861 status = mbox->status;
2862
2863 // invalidate the completed command id array. After command
2864 // completion, firmware would write the valid id.
2865 mbox->numstatus = 0xFF;
2866 mbox->status = 0xFF;
2867 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2868 mbox->completed[i] = 0xFF;
2869 }
2870
2871 return status;
2872
2873 blocked_mailbox:
2874
2875 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2876 return -1;
2877 }
2878
2879
2880 /**
2881 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2882 * @adapter : controller's soft state
2883 * @raw_mbox : the mailbox
2884 *
2885 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2886 * controllers. This is a faster version of the synchronous command and
2887 * therefore can be called in interrupt-context as well.
2888 */
2889 static int
2890 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2891 {
2892 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2893 mbox_t *mbox;
2894 long i;
2895
2896
2897 mbox = raid_dev->mbox;
2898
2899 // return immediately if the mailbox is busy
2900 if (mbox->busy) return -1;
2901
2902 // Copy mailbox data into host structure
2903 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2904 mbox->cmdid = 0xFE;
2905 mbox->busy = 1;
2906 mbox->poll = 0;
2907 mbox->ack = 0;
2908 mbox->numstatus = 0xFF;
2909 mbox->status = 0xFF;
2910
2911 wmb();
2912 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2913
2914 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
2915 if (mbox->numstatus != 0xFF) break;
2916 rmb();
2917 udelay(MBOX_SYNC_DELAY_200);
2918 }
2919
2920 if (i == MBOX_SYNC_WAIT_CNT) {
2921 // We may need to re-calibrate the counter
2922 con_log(CL_ANN, (KERN_CRIT
2923 "megaraid: fast sync command timed out\n"));
2924 }
2925
2926 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2927 wmb();
2928
2929 return mbox->status;
2930 }
2931
2932
2933 /**
2934 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
2935 * @raid_dev : RAID device (HBA) soft state
2936 *
2937 * Wait until the controller's mailbox is available to accept more commands.
2938 * Wait for at most 1 second.
2939 */
2940 static int
2941 megaraid_busywait_mbox(mraid_device_t *raid_dev)
2942 {
2943 mbox_t *mbox = raid_dev->mbox;
2944 int i = 0;
2945
2946 if (mbox->busy) {
2947 udelay(25);
2948 for (i = 0; mbox->busy && i < 1000; i++)
2949 msleep(1);
2950 }
2951
2952 if (i < 1000) return 0;
2953 else return -1;
2954 }
2955
2956
2957 /**
2958 * megaraid_mbox_product_info - some static information about the controller
2959 * @adapter : our soft state
2960 *
2961 * Issue commands to the controller to grab some parameters required by our
2962 * caller.
2963 */
2964 static int
2965 megaraid_mbox_product_info(adapter_t *adapter)
2966 {
2967 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2968 mbox_t *mbox;
2969 uint8_t raw_mbox[sizeof(mbox_t)];
2970 mraid_pinfo_t *pinfo;
2971 dma_addr_t pinfo_dma_h;
2972 mraid_inquiry3_t *mraid_inq3;
2973 int i;
2974
2975
2976 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2977 mbox = (mbox_t *)raw_mbox;
2978
2979 /*
2980 * Issue an ENQUIRY3 command to find out certain adapter parameters,
2981 * e.g., max channels, max commands etc.
2982 */
2983 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
2984 &pinfo_dma_h);
2985
2986 if (pinfo == NULL) {
2987 con_log(CL_ANN, (KERN_WARNING
2988 "megaraid: out of memory, %s %d\n", __FUNCTION__,
2989 __LINE__));
2990
2991 return -1;
2992 }
2993 memset(pinfo, 0, sizeof(mraid_pinfo_t));
2994
2995 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
2996 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
2997
2998 raw_mbox[0] = FC_NEW_CONFIG;
2999 raw_mbox[2] = NC_SUBOP_ENQUIRY3;
3000 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
3001
3002 // Issue the command
3003 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3004
3005 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3006
3007 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3008 pinfo, pinfo_dma_h);
3009
3010 return -1;
3011 }
3012
3013 /*
3014 * Collect information about state of each physical drive
3015 * attached to the controller. We will expose all the disks
3016 * which are not part of RAID
3017 */
3018 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3019 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3020 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3021 }
3022
3023 /*
3024 * Get product info for information like number of channels,
3025 * maximum commands supported.
3026 */
3027 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3028 mbox->xferaddr = (uint32_t)pinfo_dma_h;
3029
3030 raw_mbox[0] = FC_NEW_CONFIG;
3031 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3032
3033 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3034
3035 con_log(CL_ANN, (KERN_WARNING
3036 "megaraid: product info failed\n"));
3037
3038 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3039 pinfo, pinfo_dma_h);
3040
3041 return -1;
3042 }
3043
3044 /*
3045 * Setup some parameters for host, as required by our caller
3046 */
3047 adapter->max_channel = pinfo->nchannels;
3048
3049 /*
3050 * we will export all the logical drives on a single channel.
3051 * Add 1 since inquires do not come for inititor ID
3052 */
3053 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1;
3054 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices
3055
3056 /*
3057 * These are the maximum outstanding commands for the scsi-layer
3058 */
3059 adapter->max_cmds = MBOX_MAX_SCSI_CMDS;
3060
3061 memset(adapter->fw_version, 0, VERSION_SIZE);
3062 memset(adapter->bios_version, 0, VERSION_SIZE);
3063
3064 memcpy(adapter->fw_version, pinfo->fw_version, 4);
3065 adapter->fw_version[4] = 0;
3066
3067 memcpy(adapter->bios_version, pinfo->bios_version, 4);
3068 adapter->bios_version[4] = 0;
3069
3070 con_log(CL_ANN, (KERN_NOTICE
3071 "megaraid: fw version:[%s] bios version:[%s]\n",
3072 adapter->fw_version, adapter->bios_version));
3073
3074 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3075 pinfo_dma_h);
3076
3077 return 0;
3078 }
3079
3080
3081
3082 /**
3083 * megaraid_mbox_extended_cdb - check for support for extended CDBs
3084 * @adapter : soft state for the controller
3085 *
3086 * This routine check whether the controller in question supports extended
3087 * ( > 10 bytes ) CDBs.
3088 */
3089 static int
3090 megaraid_mbox_extended_cdb(adapter_t *adapter)
3091 {
3092 mbox_t *mbox;
3093 uint8_t raw_mbox[sizeof(mbox_t)];
3094 int rval;
3095
3096 mbox = (mbox_t *)raw_mbox;
3097
3098 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3099 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3100
3101 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3102
3103 raw_mbox[0] = MAIN_MISC_OPCODE;
3104 raw_mbox[2] = SUPPORT_EXT_CDB;
3105
3106 /*
3107 * Issue the command
3108 */
3109 rval = 0;
3110 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3111 rval = -1;
3112 }
3113
3114 return rval;
3115 }
3116
3117
3118 /**
3119 * megaraid_mbox_support_ha - Do we support clustering
3120 * @adapter : soft state for the controller
3121 * @init_id : ID of the initiator
3122 *
3123 * Determine if the firmware supports clustering and the ID of the initiator.
3124 */
3125 static int
3126 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3127 {
3128 mbox_t *mbox;
3129 uint8_t raw_mbox[sizeof(mbox_t)];
3130 int rval;
3131
3132
3133 mbox = (mbox_t *)raw_mbox;
3134
3135 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3136
3137 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3138
3139 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3140
3141 raw_mbox[0] = GET_TARGET_ID;
3142
3143 // Issue the command
3144 *init_id = 7;
3145 rval = -1;
3146 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3147
3148 *init_id = *(uint8_t *)adapter->ibuf;
3149
3150 con_log(CL_ANN, (KERN_INFO
3151 "megaraid: cluster firmware, initiator ID: %d\n",
3152 *init_id));
3153
3154 rval = 0;
3155 }
3156
3157 return rval;
3158 }
3159
3160
3161 /**
3162 * megaraid_mbox_support_random_del - Do we support random deletion
3163 * @adapter : soft state for the controller
3164 *
3165 * Determine if the firmware supports random deletion.
3166 * Return: 1 is operation supported, 0 otherwise
3167 */
3168 static int
3169 megaraid_mbox_support_random_del(adapter_t *adapter)
3170 {
3171 mbox_t *mbox;
3172 uint8_t raw_mbox[sizeof(mbox_t)];
3173 int rval;
3174
3175
3176 mbox = (mbox_t *)raw_mbox;
3177
3178 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3179
3180 raw_mbox[0] = FC_DEL_LOGDRV;
3181 raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3182
3183 // Issue the command
3184 rval = 0;
3185 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3186
3187 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3188
3189 rval = 1;
3190 }
3191
3192 return rval;
3193 }
3194
3195
3196 /**
3197 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3198 * @adapter : soft state for the controller
3199 *
3200 * Find out the maximum number of scatter-gather elements supported by the
3201 * firmware.
3202 */
3203 static int
3204 megaraid_mbox_get_max_sg(adapter_t *adapter)
3205 {
3206 mbox_t *mbox;
3207 uint8_t raw_mbox[sizeof(mbox_t)];
3208 int nsg;
3209
3210
3211 mbox = (mbox_t *)raw_mbox;
3212
3213 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3214
3215 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3216
3217 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3218
3219 raw_mbox[0] = MAIN_MISC_OPCODE;
3220 raw_mbox[2] = GET_MAX_SG_SUPPORT;
3221
3222 // Issue the command
3223 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3224 nsg = *(uint8_t *)adapter->ibuf;
3225 }
3226 else {
3227 nsg = MBOX_DEFAULT_SG_SIZE;
3228 }
3229
3230 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3231
3232 return nsg;
3233 }
3234
3235
3236 /**
3237 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3238 * @adapter : soft state for the controller
3239 *
3240 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3241 * can be exported as regular SCSI channels.
3242 */
3243 static void
3244 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3245 {
3246 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3247 mbox_t *mbox;
3248 uint8_t raw_mbox[sizeof(mbox_t)];
3249
3250
3251 mbox = (mbox_t *)raw_mbox;
3252
3253 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3254
3255 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3256
3257 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3258
3259 raw_mbox[0] = CHNL_CLASS;
3260 raw_mbox[2] = GET_CHNL_CLASS;
3261
3262 // Issue the command. If the command fails, all channels are RAID
3263 // channels
3264 raid_dev->channel_class = 0xFF;
3265 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3266 raid_dev->channel_class = *(uint8_t *)adapter->ibuf;
3267 }
3268
3269 return;
3270 }
3271
3272
3273 /**
3274 * megaraid_mbox_flush_cache - flush adapter and disks cache
3275 * @adapter : soft state for the controller
3276 *
3277 * Flush adapter cache followed by disks cache.
3278 */
3279 static void
3280 megaraid_mbox_flush_cache(adapter_t *adapter)
3281 {
3282 mbox_t *mbox;
3283 uint8_t raw_mbox[sizeof(mbox_t)];
3284
3285
3286 mbox = (mbox_t *)raw_mbox;
3287
3288 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3289
3290 raw_mbox[0] = FLUSH_ADAPTER;
3291
3292 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3293 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3294 }
3295
3296 raw_mbox[0] = FLUSH_SYSTEM;
3297
3298 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3299 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3300 }
3301
3302 return;
3303 }
3304
3305
3306 /**
3307 * megaraid_mbox_fire_sync_cmd - fire the sync cmd
3308 * @adapter : soft state for the controller
3309 *
3310 * Clears the pending cmds in FW and reinits its RAID structs.
3311 */
3312 static int
3313 megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3314 {
3315 mbox_t *mbox;
3316 uint8_t raw_mbox[sizeof(mbox_t)];
3317 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3318 mbox64_t *mbox64;
3319 int status = 0;
3320 int i;
3321 uint32_t dword;
3322
3323 mbox = (mbox_t *)raw_mbox;
3324
3325 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3326
3327 raw_mbox[0] = 0xFF;
3328
3329 mbox64 = raid_dev->mbox64;
3330 mbox = raid_dev->mbox;
3331
3332 /* Wait until mailbox is free */
3333 if (megaraid_busywait_mbox(raid_dev) != 0) {
3334 status = 1;
3335 goto blocked_mailbox;
3336 }
3337
3338 /* Copy mailbox data into host structure */
3339 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3340 mbox->cmdid = 0xFE;
3341 mbox->busy = 1;
3342 mbox->poll = 0;
3343 mbox->ack = 0;
3344 mbox->numstatus = 0;
3345 mbox->status = 0;
3346
3347 wmb();
3348 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3349
3350 /* Wait for maximum 1 min for status to post.
3351 * If the Firmware SUPPORTS the ABOVE COMMAND,
3352 * mbox->cmd will be set to 0
3353 * else
3354 * the firmware will reject the command with
3355 * mbox->numstatus set to 1
3356 */
3357
3358 i = 0;
3359 status = 0;
3360 while (!mbox->numstatus && mbox->cmd == 0xFF) {
3361 rmb();
3362 msleep(1);
3363 i++;
3364 if (i > 1000 * 60) {
3365 status = 1;
3366 break;
3367 }
3368 }
3369 if (mbox->numstatus == 1)
3370 status = 1; /*cmd not supported*/
3371
3372 /* Check for interrupt line */
3373 dword = RDOUTDOOR(raid_dev);
3374 WROUTDOOR(raid_dev, dword);
3375 WRINDOOR(raid_dev,2);
3376
3377 return status;
3378
3379 blocked_mailbox:
3380 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3381 return status;
3382 }
3383
3384 /**
3385 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3386 * @adapter : controller's soft state
3387 * @scb : SCB to be displayed
3388 * @level : debug level for console print
3389 *
3390 * Diplay information about the given SCB iff the current debug level is
3391 * verbose.
3392 */
3393 static void
3394 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3395 {
3396 mbox_ccb_t *ccb;
3397 struct scsi_cmnd *scp;
3398 mbox_t *mbox;
3399 int level;
3400 int i;
3401
3402
3403 ccb = (mbox_ccb_t *)scb->ccb;
3404 scp = scb->scp;
3405 mbox = ccb->mbox;
3406
3407 level = CL_DLEVEL3;
3408
3409 con_log(level, (KERN_NOTICE
3410 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3411 mbox->cmd, scb->sno));
3412
3413 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3414 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3415 mbox->numsge));
3416
3417 if (!scp) return;
3418
3419 con_log(level, (KERN_NOTICE "scsi cmnd: "));
3420
3421 for (i = 0; i < scp->cmd_len; i++) {
3422 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3423 }
3424
3425 con_log(level, ("\n"));
3426
3427 return;
3428 }
3429
3430
3431 /**
3432 * megaraid_mbox_setup_device_map - manage device ids
3433 * @adapter : Driver's soft state
3434 *
3435 * Manange the device ids to have an appropraite mapping between the kernel
3436 * scsi addresses and megaraid scsi and logical drive addresses. We export
3437 * scsi devices on their actual addresses, whereas the logical drives are
3438 * exported on a virtual scsi channel.
3439 */
3440 static void
3441 megaraid_mbox_setup_device_map(adapter_t *adapter)
3442 {
3443 uint8_t c;
3444 uint8_t t;
3445
3446 /*
3447 * First fill the values on the logical drive channel
3448 */
3449 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3450 adapter->device_ids[adapter->max_channel][t] =
3451 (t < adapter->init_id) ? t : t - 1;
3452
3453 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3454
3455 /*
3456 * Fill the values on the physical devices channels
3457 */
3458 for (c = 0; c < adapter->max_channel; c++)
3459 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3460 adapter->device_ids[c][t] = (c << 8) | t;
3461 }
3462
3463
3464 /*
3465 * END: internal commands library
3466 */
3467
3468 /*
3469 * START: Interface for the common management module
3470 *
3471 * This is the module, which interfaces with the common mangement module to
3472 * provide support for ioctl and sysfs
3473 */
3474
3475 /**
3476 * megaraid_cmm_register - register with the mangement module
3477 * @adapter : HBA soft state
3478 *
3479 * Register with the management module, which allows applications to issue
3480 * ioctl calls to the drivers. This interface is used by the management module
3481 * to setup sysfs support as well.
3482 */
3483 static int
3484 megaraid_cmm_register(adapter_t *adapter)
3485 {
3486 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3487 mraid_mmadp_t adp;
3488 scb_t *scb;
3489 mbox_ccb_t *ccb;
3490 int rval;
3491 int i;
3492
3493 // Allocate memory for the base list of scb for management module.
3494 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL);
3495
3496 if (adapter->uscb_list == NULL) {
3497 con_log(CL_ANN, (KERN_WARNING
3498 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3499 __LINE__));
3500 return -1;
3501 }
3502
3503
3504 // Initialize the synchronization parameters for resources for
3505 // commands for management module
3506 INIT_LIST_HEAD(&adapter->uscb_pool);
3507
3508 spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3509
3510
3511
3512 // link all the packets. Note, CCB for commands, coming from the
3513 // commom management module, mailbox physical address are already
3514 // setup by it. We just need placeholder for that in our local command
3515 // control blocks
3516 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3517
3518 scb = adapter->uscb_list + i;
3519 ccb = raid_dev->uccb_list + i;
3520
3521 scb->ccb = (caddr_t)ccb;
3522 ccb->mbox64 = raid_dev->umbox64 + i;
3523 ccb->mbox = &ccb->mbox64->mbox32;
3524 ccb->raw_mbox = (uint8_t *)ccb->mbox;
3525
3526 scb->gp = 0;
3527
3528 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3529 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3530 scb->sno = i + MBOX_MAX_SCSI_CMDS;
3531
3532 scb->scp = NULL;
3533 scb->state = SCB_FREE;
3534 scb->dma_direction = PCI_DMA_NONE;
3535 scb->dma_type = MRAID_DMA_NONE;
3536 scb->dev_channel = -1;
3537 scb->dev_target = -1;
3538
3539 // put scb in the free pool
3540 list_add_tail(&scb->list, &adapter->uscb_pool);
3541 }
3542
3543 adp.unique_id = adapter->unique_id;
3544 adp.drvr_type = DRVRTYPE_MBOX;
3545 adp.drvr_data = (unsigned long)adapter;
3546 adp.pdev = adapter->pdev;
3547 adp.issue_uioc = megaraid_mbox_mm_handler;
3548 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
3549 adp.max_kioc = MBOX_MAX_USER_CMDS;
3550
3551 if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3552
3553 con_log(CL_ANN, (KERN_WARNING
3554 "megaraid mbox: did not register with CMM\n"));
3555
3556 kfree(adapter->uscb_list);
3557 }
3558
3559 return rval;
3560 }
3561
3562
3563 /**
3564 * megaraid_cmm_unregister - un-register with the mangement module
3565 * @adapter : HBA soft state
3566 *
3567 * Un-register with the management module.
3568 * FIXME: mgmt module must return failure for unregister if it has pending
3569 * commands in LLD.
3570 */
3571 static int
3572 megaraid_cmm_unregister(adapter_t *adapter)
3573 {
3574 kfree(adapter->uscb_list);
3575 mraid_mm_unregister_adp(adapter->unique_id);
3576 return 0;
3577 }
3578
3579
3580 /**
3581 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3582 * @drvr_data : LLD specific data
3583 * @kioc : CMM interface packet
3584 * @action : command action
3585 *
3586 * This routine is invoked whenever the Common Mangement Module (CMM) has a
3587 * command for us. The 'action' parameter specifies if this is a new command
3588 * or otherwise.
3589 */
3590 static int
3591 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3592 {
3593 adapter_t *adapter;
3594
3595 if (action != IOCTL_ISSUE) {
3596 con_log(CL_ANN, (KERN_WARNING
3597 "megaraid: unsupported management action:%#2x\n",
3598 action));
3599 return (-ENOTSUPP);
3600 }
3601
3602 adapter = (adapter_t *)drvr_data;
3603
3604 // make sure this adapter is not being detached right now.
3605 if (atomic_read(&adapter->being_detached)) {
3606 con_log(CL_ANN, (KERN_WARNING
3607 "megaraid: reject management request, detaching\n"));
3608 return (-ENODEV);
3609 }
3610
3611 switch (kioc->opcode) {
3612
3613 case GET_ADAP_INFO:
3614
3615 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *)
3616 (unsigned long)kioc->buf_vaddr);
3617
3618 kioc->done(kioc);
3619
3620 return kioc->status;
3621
3622 case MBOX_CMD:
3623
3624 return megaraid_mbox_mm_command(adapter, kioc);
3625
3626 default:
3627 kioc->status = (-EINVAL);
3628 kioc->done(kioc);
3629 return (-EINVAL);
3630 }
3631
3632 return 0; // not reached
3633 }
3634
3635 /**
3636 * megaraid_mbox_mm_command - issues commands routed through CMM
3637 * @adapter : HBA soft state
3638 * @kioc : management command packet
3639 *
3640 * Issues commands, which are routed through the management module.
3641 */
3642 static int
3643 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3644 {
3645 struct list_head *head = &adapter->uscb_pool;
3646 mbox64_t *mbox64;
3647 uint8_t *raw_mbox;
3648 scb_t *scb;
3649 mbox_ccb_t *ccb;
3650 unsigned long flags;
3651
3652 // detach one scb from free pool
3653 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3654
3655 if (list_empty(head)) { // should never happen because of CMM
3656
3657 con_log(CL_ANN, (KERN_WARNING
3658 "megaraid mbox: bug in cmm handler, lost resources\n"));
3659
3660 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3661
3662 return (-EINVAL);
3663 }
3664
3665 scb = list_entry(head->next, scb_t, list);
3666 list_del_init(&scb->list);
3667
3668 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3669
3670 scb->state = SCB_ACTIVE;
3671 scb->dma_type = MRAID_DMA_NONE;
3672 scb->dma_direction = PCI_DMA_NONE;
3673
3674 ccb = (mbox_ccb_t *)scb->ccb;
3675 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3676 raw_mbox = (uint8_t *)&mbox64->mbox32;
3677
3678 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3679
3680 scb->gp = (unsigned long)kioc;
3681
3682 /*
3683 * If it is a logdrv random delete operation, we have to wait till
3684 * there are no outstanding cmds at the fw and then issue it directly
3685 */
3686 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3687
3688 if (wait_till_fw_empty(adapter)) {
3689 con_log(CL_ANN, (KERN_NOTICE
3690 "megaraid mbox: LD delete, timed out\n"));
3691
3692 kioc->status = -ETIME;
3693
3694 scb->status = -1;
3695
3696 megaraid_mbox_mm_done(adapter, scb);
3697
3698 return (-ETIME);
3699 }
3700
3701 INIT_LIST_HEAD(&scb->list);
3702
3703 scb->state = SCB_ISSUED;
3704 if (mbox_post_cmd(adapter, scb) != 0) {
3705
3706 con_log(CL_ANN, (KERN_NOTICE
3707 "megaraid mbox: LD delete, mailbox busy\n"));
3708
3709 kioc->status = -EBUSY;
3710
3711 scb->status = -1;
3712
3713 megaraid_mbox_mm_done(adapter, scb);
3714
3715 return (-EBUSY);
3716 }
3717
3718 return 0;
3719 }
3720
3721 // put the command on the pending list and execute
3722 megaraid_mbox_runpendq(adapter, scb);
3723
3724 return 0;
3725 }
3726
3727
3728 static int
3729 wait_till_fw_empty(adapter_t *adapter)
3730 {
3731 unsigned long flags = 0;
3732 int i;
3733
3734
3735 /*
3736 * Set the quiescent flag to stop issuing cmds to FW.
3737 */
3738 spin_lock_irqsave(&adapter->lock, flags);
3739 adapter->quiescent++;
3740 spin_unlock_irqrestore(&adapter->lock, flags);
3741
3742 /*
3743 * Wait till there are no more cmds outstanding at FW. Try for at most
3744 * 60 seconds
3745 */
3746 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3747 con_log(CL_DLEVEL1, (KERN_INFO
3748 "megaraid: FW has %d pending commands\n",
3749 adapter->outstanding_cmds));
3750
3751 msleep(1000);
3752 }
3753
3754 return adapter->outstanding_cmds;
3755 }
3756
3757
3758 /**
3759 * megaraid_mbox_mm_done - callback for CMM commands
3760 * @adapter : HBA soft state
3761 * @scb : completed command
3762 *
3763 * Callback routine for internal commands originated from the management
3764 * module.
3765 */
3766 static void
3767 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3768 {
3769 uioc_t *kioc;
3770 mbox64_t *mbox64;
3771 uint8_t *raw_mbox;
3772 unsigned long flags;
3773
3774 kioc = (uioc_t *)scb->gp;
3775 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3776 mbox64->mbox32.status = scb->status;
3777 raw_mbox = (uint8_t *)&mbox64->mbox32;
3778
3779
3780 // put scb in the free pool
3781 scb->state = SCB_FREE;
3782 scb->scp = NULL;
3783
3784 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3785
3786 list_add(&scb->list, &adapter->uscb_pool);
3787
3788 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3789
3790 // if a delete logical drive operation succeeded, restart the
3791 // controller
3792 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3793
3794 adapter->quiescent--;
3795
3796 megaraid_mbox_runpendq(adapter, NULL);
3797 }
3798
3799 kioc->done(kioc);
3800
3801 return;
3802 }
3803
3804
3805 /**
3806 * gather_hbainfo - HBA characteristics for the applications
3807 * @adapter : HBA soft state
3808 * @hinfo : pointer to the caller's host info strucuture
3809 */
3810 static int
3811 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3812 {
3813 uint8_t dmajor;
3814
3815 dmajor = megaraid_mbox_version[0];
3816
3817 hinfo->pci_vendor_id = adapter->pdev->vendor;
3818 hinfo->pci_device_id = adapter->pdev->device;
3819 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3820 hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3821
3822 hinfo->pci_bus = adapter->pdev->bus->number;
3823 hinfo->pci_dev_fn = adapter->pdev->devfn;
3824 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn);
3825 hinfo->irq = adapter->host->irq;
3826 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport;
3827
3828 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3829 hinfo->host_no = adapter->host->host_no;
3830
3831 return 0;
3832 }
3833
3834 /*
3835 * END: Interface for the common management module
3836 */
3837
3838
3839
3840 /**
3841 * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3842 * @adapter : controller's soft state
3843 *
3844 * Allocate packets required to issue FW calls whenever the sysfs attributes
3845 * are read. These attributes would require up-to-date information from the
3846 * FW. Also set up resources for mutual exclusion to share these resources and
3847 * the wait queue.
3848 *
3849 * Return 0 on success.
3850 * Return -ERROR_CODE on failure.
3851 */
3852 static int
3853 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3854 {
3855 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3856 int rval = 0;
3857
3858 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3859
3860 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3861
3862 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3863 PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3864
3865 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3866 !raid_dev->sysfs_buffer) {
3867
3868 con_log(CL_ANN, (KERN_WARNING
3869 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3870 __LINE__));
3871
3872 rval = -ENOMEM;
3873
3874 megaraid_sysfs_free_resources(adapter);
3875 }
3876
3877 mutex_init(&raid_dev->sysfs_mtx);
3878
3879 init_waitqueue_head(&raid_dev->sysfs_wait_q);
3880
3881 return rval;
3882 }
3883
3884
3885 /**
3886 * megaraid_sysfs_free_resources - free sysfs related resources
3887 * @adapter : controller's soft state
3888 *
3889 * Free packets allocated for sysfs FW commands
3890 */
3891 static void
3892 megaraid_sysfs_free_resources(adapter_t *adapter)
3893 {
3894 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3895
3896 kfree(raid_dev->sysfs_uioc);
3897 kfree(raid_dev->sysfs_mbox64);
3898
3899 if (raid_dev->sysfs_buffer) {
3900 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3901 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3902 }
3903 }
3904
3905
3906 /**
3907 * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3908 * @uioc : completed packet
3909 *
3910 * Callback routine called in the ISR/tasklet context for get ldmap call
3911 */
3912 static void
3913 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3914 {
3915 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3916 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3917
3918 uioc->status = 0;
3919
3920 wake_up(&raid_dev->sysfs_wait_q);
3921 }
3922
3923
3924 /**
3925 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3926 * @data : timed out packet
3927 *
3928 * Timeout routine to recover and return to application, in case the adapter
3929 * has stopped responding. A timeout of 60 seconds for this command seems like
3930 * a good value.
3931 */
3932 static void
3933 megaraid_sysfs_get_ldmap_timeout(unsigned long data)
3934 {
3935 uioc_t *uioc = (uioc_t *)data;
3936 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3937 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3938
3939 uioc->status = -ETIME;
3940
3941 wake_up(&raid_dev->sysfs_wait_q);
3942 }
3943
3944
3945 /**
3946 * megaraid_sysfs_get_ldmap - get update logical drive map
3947 * @adapter : controller's soft state
3948 *
3949 * This routine will be called whenever user reads the logical drive
3950 * attributes, go get the current logical drive mapping table from the
3951 * firmware. We use the managment API's to issue commands to the controller.
3952 *
3953 * NOTE: The commands issuance functionality is not generalized and
3954 * implemented in context of "get ld map" command only. If required, the
3955 * command issuance logical can be trivially pulled out and implemented as a
3956 * standalone libary. For now, this should suffice since there is no other
3957 * user of this interface.
3958 *
3959 * Return 0 on success.
3960 * Return -1 on failure.
3961 */
3962 static int
3963 megaraid_sysfs_get_ldmap(adapter_t *adapter)
3964 {
3965 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3966 uioc_t *uioc;
3967 mbox64_t *mbox64;
3968 mbox_t *mbox;
3969 char *raw_mbox;
3970 struct timer_list sysfs_timer;
3971 struct timer_list *timerp;
3972 caddr_t ldmap;
3973 int rval = 0;
3974
3975 /*
3976 * Allow only one read at a time to go through the sysfs attributes
3977 */
3978 mutex_lock(&raid_dev->sysfs_mtx);
3979
3980 uioc = raid_dev->sysfs_uioc;
3981 mbox64 = raid_dev->sysfs_mbox64;
3982 ldmap = raid_dev->sysfs_buffer;
3983
3984 memset(uioc, 0, sizeof(uioc_t));
3985 memset(mbox64, 0, sizeof(mbox64_t));
3986 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
3987
3988 mbox = &mbox64->mbox32;
3989 raw_mbox = (char *)mbox;
3990 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64;
3991 uioc->buf_vaddr = (caddr_t)adapter;
3992 uioc->status = -ENODATA;
3993 uioc->done = megaraid_sysfs_get_ldmap_done;
3994
3995 /*
3996 * Prepare the mailbox packet to get the current logical drive mapping
3997 * table
3998 */
3999 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
4000
4001 raw_mbox[0] = FC_DEL_LOGDRV;
4002 raw_mbox[2] = OP_GET_LDID_MAP;
4003
4004 /*
4005 * Setup a timer to recover from a non-responding controller
4006 */
4007 timerp = &sysfs_timer;
4008 init_timer(timerp);
4009
4010 timerp->function = megaraid_sysfs_get_ldmap_timeout;
4011 timerp->data = (unsigned long)uioc;
4012 timerp->expires = jiffies + 60 * HZ;
4013
4014 add_timer(timerp);
4015
4016 /*
4017 * Send the command to the firmware
4018 */
4019 rval = megaraid_mbox_mm_command(adapter, uioc);
4020
4021 if (rval == 0) { // command successfully issued
4022 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4023
4024 /*
4025 * Check if the command timed out
4026 */
4027 if (uioc->status == -ETIME) {
4028 con_log(CL_ANN, (KERN_NOTICE
4029 "megaraid: sysfs get ld map timed out\n"));
4030
4031 rval = -ETIME;
4032 }
4033 else {
4034 rval = mbox->status;
4035 }
4036
4037 if (rval == 0) {
4038 memcpy(raid_dev->curr_ldmap, ldmap,
4039 sizeof(raid_dev->curr_ldmap));
4040 }
4041 else {
4042 con_log(CL_ANN, (KERN_NOTICE
4043 "megaraid: get ld map failed with %x\n", rval));
4044 }
4045 }
4046 else {
4047 con_log(CL_ANN, (KERN_NOTICE
4048 "megaraid: could not issue ldmap command:%x\n", rval));
4049 }
4050
4051
4052 del_timer_sync(timerp);
4053
4054 mutex_unlock(&raid_dev->sysfs_mtx);
4055
4056 return rval;
4057 }
4058
4059
4060 /**
4061 * megaraid_sysfs_show_app_hndl - display application handle for this adapter
4062 * @cdev : class device object representation for the host
4063 * @buf : buffer to send data to
4064 *
4065 * Display the handle used by the applications while executing management
4066 * tasks on the adapter. We invoke a management module API to get the adapter
4067 * handle, since we do not interface with applications directly.
4068 */
4069 static ssize_t
4070 megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf)
4071 {
4072 struct Scsi_Host *shost = class_to_shost(cdev);
4073 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4074 uint32_t app_hndl;
4075
4076 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4077
4078 return snprintf(buf, 8, "%u\n", app_hndl);
4079 }
4080
4081
4082 /**
4083 * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4084 * @dev : device object representation for the scsi device
4085 * @attr : device attribute to show
4086 * @buf : buffer to send data to
4087 *
4088 * Display the logical drive number for the device in question, if it a valid
4089 * logical drive. For physical devices, "-1" is returned.
4090 *
4091 * The logical drive number is displayed in following format:
4092 *
4093 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4094 *
4095 * <int> <int> <int> <int>
4096 */
4097 static ssize_t
4098 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
4099 {
4100 struct scsi_device *sdev = to_scsi_device(dev);
4101 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4102 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4103 int scsi_id = -1;
4104 int logical_drv = -1;
4105 int ldid_map = -1;
4106 uint32_t app_hndl = 0;
4107 int mapped_sdev_id;
4108 int rval;
4109 int i;
4110
4111 if (raid_dev->random_del_supported &&
4112 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4113
4114 rval = megaraid_sysfs_get_ldmap(adapter);
4115 if (rval == 0) {
4116
4117 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4118
4119 mapped_sdev_id = sdev->id;
4120
4121 if (sdev->id > adapter->init_id) {
4122 mapped_sdev_id -= 1;
4123 }
4124
4125 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4126
4127 scsi_id = sdev->id;
4128
4129 logical_drv = i;
4130
4131 ldid_map = raid_dev->curr_ldmap[i];
4132
4133 app_hndl = mraid_mm_adapter_app_handle(
4134 adapter->unique_id);
4135
4136 break;
4137 }
4138 }
4139 }
4140 else {
4141 con_log(CL_ANN, (KERN_NOTICE
4142 "megaraid: sysfs get ld map failed: %x\n",
4143 rval));
4144 }
4145 }
4146
4147 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4148 ldid_map, app_hndl);
4149 }
4150
4151
4152 /*
4153 * END: Mailbox Low Level Driver
4154 */
4155 module_init(megaraid_init);
4156 module_exit(megaraid_exit);
4157
4158 /* vim: set ts=8 sw=8 tw=78 ai si: */
Compression patch for TCP for Linux kernel