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[SCSI] megaraid_{mm,mbox}: 64-bit DMA capability checker
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / megaraid / megaraid_mbox.c
CommitLineData
1da177e4
LT		 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
fbf60802 13 * Version : v2.20.4.9 (Jul 16 2006)
1da177e4
LT		 14 *
15 * Authors:
16 * Atul Mukker <Atul.Mukker@lsil.com>
17 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsil.com>
18 * Manoj Jose <Manoj.Jose@lsil.com>
ed7e8ef7 19 * Seokmann Ju <Seokmann.Ju@lsil.com>
1da177e4
LT		 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
75static int megaraid_init(void);
76static void megaraid_exit(void);
77
78static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
79static void megaraid_detach_one(struct pci_dev *);
5457b6a6 80static void megaraid_mbox_shutdown(struct pci_dev *);
1da177e4
LT		 81
82static int megaraid_io_attach(adapter_t *);
83static void megaraid_io_detach(adapter_t *);
84
85static int megaraid_init_mbox(adapter_t *);
86static void megaraid_fini_mbox(adapter_t *);
87
88static int megaraid_alloc_cmd_packets(adapter_t *);
89static void megaraid_free_cmd_packets(adapter_t *);
90
91static int megaraid_mbox_setup_dma_pools(adapter_t *);
92static void megaraid_mbox_teardown_dma_pools(adapter_t *);
93
94static int megaraid_sysfs_alloc_resources(adapter_t *);
95static void megaraid_sysfs_free_resources(adapter_t *);
96
97static int megaraid_abort_handler(struct scsi_cmnd *);
98static int megaraid_reset_handler(struct scsi_cmnd *);
99
100static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
101static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
102static int megaraid_busywait_mbox(mraid_device_t *);
103static int megaraid_mbox_product_info(adapter_t *);
104static int megaraid_mbox_extended_cdb(adapter_t *);
105static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
106static int megaraid_mbox_support_random_del(adapter_t *);
107static int megaraid_mbox_get_max_sg(adapter_t *);
108static void megaraid_mbox_enum_raid_scsi(adapter_t *);
109static void megaraid_mbox_flush_cache(adapter_t *);
110
111static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
112static void megaraid_mbox_setup_device_map(adapter_t *);
113
114static int megaraid_queue_command(struct scsi_cmnd *,
115 void (*)(struct scsi_cmnd *));
116static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
117static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
118static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
119 struct scsi_cmnd *);
120static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
121 struct scsi_cmnd *);
122
123static irqreturn_t megaraid_isr(int, void *, struct pt_regs *);
124
125static void megaraid_mbox_dpc(unsigned long);
126
127static ssize_t megaraid_sysfs_show_app_hndl(struct class_device *, char *);
10523b3b 128static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *);
1da177e4
LT		 129
130static int megaraid_cmm_register(adapter_t *);
131static int megaraid_cmm_unregister(adapter_t *);
132static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
133static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
134static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
135static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
136static int wait_till_fw_empty(adapter_t *);
137
138
139
ed7e8ef7 140MODULE_AUTHOR("sju@lsil.com");
1da177e4
LT		 141MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
142MODULE_LICENSE("GPL");
143MODULE_VERSION(MEGARAID_VERSION);
144
145/*
146 * ### modules parameters for driver ###
147 */
148
149/**
150 * Set to enable driver to expose unconfigured disk to kernel
151 */
152static int megaraid_expose_unconf_disks = 0;
153module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
154MODULE_PARM_DESC(unconf_disks,
155 "Set to expose unconfigured disks to kernel (default=0)");
156
157/**
158 * driver wait time if the adapter's mailbox is busy
159 */
160static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
161module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
162MODULE_PARM_DESC(busy_wait,
163 "Max wait for mailbox in microseconds if busy (default=10)");
164
165/**
166 * number of sectors per IO command
167 */
168static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
169module_param_named(max_sectors, megaraid_max_sectors, int, 0);
170MODULE_PARM_DESC(max_sectors,
171 "Maximum number of sectors per IO command (default=128)");
172
173/**
174 * number of commands per logical unit
175 */
176static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
177module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
178MODULE_PARM_DESC(cmd_per_lun,
179 "Maximum number of commands per logical unit (default=64)");
180
181
182/**
183 * Fast driver load option, skip scanning for physical devices during load.
184 * This would result in non-disk devices being skipped during driver load
185 * time. These can be later added though, using /proc/scsi/scsi
186 */
187static unsigned int megaraid_fast_load = 0;
188module_param_named(fast_load, megaraid_fast_load, int, 0);
189MODULE_PARM_DESC(fast_load,
190 "Faster loading of the driver, skips physical devices! (default=0)");
191
192
193/**
194 * mraid_debug level - threshold for amount of information to be displayed by
195 * the driver. This level can be changed through modules parameters, ioctl or
196 * sysfs/proc interface. By default, print the announcement messages only.
197 */
198int mraid_debug_level = CL_ANN;
199module_param_named(debug_level, mraid_debug_level, int, 0);
200MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
201
202/*
203 * ### global data ###
204 */
205static uint8_t megaraid_mbox_version[8] =
672b2d38 206 { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 };
1da177e4
LT		 207
208
209/*
210 * PCI table for all supported controllers.
211 */
212static struct pci_device_id pci_id_table_g[] = {
213 {
214 PCI_VENDOR_ID_DELL,
215 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
216 PCI_VENDOR_ID_DELL,
217 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
218 },
219 {
220 PCI_VENDOR_ID_LSI_LOGIC,
221 PCI_DEVICE_ID_PERC4_SC,
222 PCI_VENDOR_ID_DELL,
223 PCI_SUBSYS_ID_PERC4_SC,
224 },
225 {
226 PCI_VENDOR_ID_LSI_LOGIC,
227 PCI_DEVICE_ID_PERC4_DC,
228 PCI_VENDOR_ID_DELL,
229 PCI_SUBSYS_ID_PERC4_DC,
230 },
231 {
232 PCI_VENDOR_ID_LSI_LOGIC,
672b2d38
JS		 233 PCI_DEVICE_ID_VERDE,
234 PCI_ANY_ID,
235 PCI_ANY_ID,
1da177e4
LT		 236 },
237 {
238 PCI_VENDOR_ID_DELL,
239 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
240 PCI_VENDOR_ID_DELL,
241 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
242 },
243 {
244 PCI_VENDOR_ID_DELL,
245 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
246 PCI_VENDOR_ID_DELL,
247 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
248 },
249 {
250 PCI_VENDOR_ID_DELL,
251 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
252 PCI_VENDOR_ID_DELL,
253 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
254 },
255 {
256 PCI_VENDOR_ID_DELL,
257 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
258 PCI_VENDOR_ID_DELL,
259 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
260 },
261 {
262 PCI_VENDOR_ID_DELL,
263 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
264 PCI_VENDOR_ID_DELL,
265 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
266 },
267 {
268 PCI_VENDOR_ID_DELL,
269 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
270 PCI_VENDOR_ID_DELL,
271 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
272 },
273 {
274 PCI_VENDOR_ID_LSI_LOGIC,
672b2d38
JS		 275 PCI_DEVICE_ID_DOBSON,
276 PCI_ANY_ID,
277 PCI_ANY_ID,
1da177e4
LT		 278 },
279 {
280 PCI_VENDOR_ID_AMI,
281 PCI_DEVICE_ID_AMI_MEGARAID3,
ed7e8ef7
JS		 282 PCI_ANY_ID,
283 PCI_ANY_ID,
1da177e4
LT		 284 },
285 {
286 PCI_VENDOR_ID_LSI_LOGIC,
ed7e8ef7
JS		 287 PCI_DEVICE_ID_AMI_MEGARAID3,
288 PCI_ANY_ID,
289 PCI_ANY_ID,
1da177e4
LT		 290 },
291 {
292 PCI_VENDOR_ID_LSI_LOGIC,
672b2d38
JS		 293 PCI_DEVICE_ID_LINDSAY,
294 PCI_ANY_ID,
295 PCI_ANY_ID,
1da177e4 296 },
1da177e4
LT		 297 {0} /* Terminating entry */
298};
299MODULE_DEVICE_TABLE(pci, pci_id_table_g);
300
301
302static struct pci_driver megaraid_pci_driver_g = {
303 .name = "megaraid",
304 .id_table = pci_id_table_g,
305 .probe = megaraid_probe_one,
306 .remove = __devexit_p(megaraid_detach_one),
5457b6a6 307 .shutdown = megaraid_mbox_shutdown,
1da177e4
LT		 308};
309
310
311
312// definitions for the device attributes for exporting logical drive number
313// for a scsi address (Host, Channel, Id, Lun)
314
315CLASS_DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
316 NULL);
317
318// Host template initializer for megaraid mbox sysfs device attributes
319static struct class_device_attribute *megaraid_shost_attrs[] = {
320 &class_device_attr_megaraid_mbox_app_hndl,
321 NULL,
322};
323
324
325DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
326
327// Host template initializer for megaraid mbox sysfs device attributes
328static struct device_attribute *megaraid_sdev_attrs[] = {
329 &dev_attr_megaraid_mbox_ld,
330 NULL,
331};
332
333
334/*
335 * Scsi host template for megaraid unified driver
336 */
337static struct scsi_host_template megaraid_template_g = {
338 .module = THIS_MODULE,
339 .name = "LSI Logic MegaRAID driver",
340 .proc_name = "megaraid",
341 .queuecommand = megaraid_queue_command,
342 .eh_abort_handler = megaraid_abort_handler,
343 .eh_device_reset_handler = megaraid_reset_handler,
344 .eh_bus_reset_handler = megaraid_reset_handler,
345 .eh_host_reset_handler = megaraid_reset_handler,
346 .use_clustering = ENABLE_CLUSTERING,
347 .sdev_attrs = megaraid_sdev_attrs,
348 .shost_attrs = megaraid_shost_attrs,
349};
350
351
352/**
353 * megaraid_init - module load hook
354 *
355 * We register ourselves as hotplug enabled module and let PCI subsystem
356 * discover our adaters
357 **/
358static int __init
359megaraid_init(void)
360{
361 int rval;
362
363 // Announce the driver version
364 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
365 MEGARAID_EXT_VERSION));
366
367 // check validity of module parameters
368 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
369
370 con_log(CL_ANN, (KERN_WARNING
371 "megaraid mailbox: max commands per lun reset to %d\n",
372 MBOX_MAX_SCSI_CMDS));
373
374 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
375 }
376
377
378 // register as a PCI hot-plug driver module
672b2d38
JS		 379 rval = pci_register_driver(&megaraid_pci_driver_g);
380 if (rval < 0) {
1da177e4
LT		 381 con_log(CL_ANN, (KERN_WARNING
382 "megaraid: could not register hotplug support.\n"));
383 }
384
385 return rval;
386}
387
388
389/**
390 * megaraid_exit - driver unload entry point
391 *
392 * We simply unwrap the megaraid_init routine here
393 */
394static void __exit
395megaraid_exit(void)
396{
397 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
398
399 // unregister as PCI hotplug driver
400 pci_unregister_driver(&megaraid_pci_driver_g);
401
402 return;
403}
404
405
406/**
407 * megaraid_probe_one - PCI hotplug entry point
408 * @param pdev : handle to this controller's PCI configuration space
409 * @param id : pci device id of the class of controllers
410 *
411 * This routine should be called whenever a new adapter is detected by the
412 * PCI hotplug susbsytem.
413 **/
414static int __devinit
415megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
416{
417 adapter_t *adapter;
418
419
420 // detected a new controller
421 con_log(CL_ANN, (KERN_INFO
422 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
423 pdev->vendor, pdev->device, pdev->subsystem_vendor,
424 pdev->subsystem_device));
425
426 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
427 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
428
429 if (pci_enable_device(pdev)) {
430 con_log(CL_ANN, (KERN_WARNING
431 "megaraid: pci_enable_device failed\n"));
432
433 return -ENODEV;
434 }
435
436 // Enable bus-mastering on this controller
437 pci_set_master(pdev);
438
439 // Allocate the per driver initialization structure
440 adapter = kmalloc(sizeof(adapter_t), GFP_KERNEL);
441
442 if (adapter == NULL) {
443 con_log(CL_ANN, (KERN_WARNING
444 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__));
445
446 goto out_probe_one;
447 }
448 memset(adapter, 0, sizeof(adapter_t));
449
450
451 // set up PCI related soft state and other pre-known parameters
452 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn;
453 adapter->irq = pdev->irq;
454 adapter->pdev = pdev;
455
456 atomic_set(&adapter->being_detached, 0);
457
458 // Setup the default DMA mask. This would be changed later on
459 // depending on hardware capabilities
672b2d38 460 if (pci_set_dma_mask(adapter->pdev, DMA_32BIT_MASK) != 0) {
1da177e4
LT		 461
462 con_log(CL_ANN, (KERN_WARNING
463 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
464
465 goto out_free_adapter;
466 }
467
468
469 // Initialize the synchronization lock for kernel and LLD
470 spin_lock_init(&adapter->lock);
1da177e4
LT		 471
472 // Initialize the command queues: the list of free SCBs and the list
473 // of pending SCBs.
474 INIT_LIST_HEAD(&adapter->kscb_pool);
475 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
476
477 INIT_LIST_HEAD(&adapter->pend_list);
478 spin_lock_init(PENDING_LIST_LOCK(adapter));
479
480 INIT_LIST_HEAD(&adapter->completed_list);
481 spin_lock_init(COMPLETED_LIST_LOCK(adapter));
482
483
484 // Start the mailbox based controller
485 if (megaraid_init_mbox(adapter) != 0) {
486 con_log(CL_ANN, (KERN_WARNING
487 "megaraid: maibox adapter did not initialize\n"));
488
489 goto out_free_adapter;
490 }
491
492 // Register with LSI Common Management Module
493 if (megaraid_cmm_register(adapter) != 0) {
494
495 con_log(CL_ANN, (KERN_WARNING
496 "megaraid: could not register with management module\n"));
497
498 goto out_fini_mbox;
499 }
500
501 // setup adapter handle in PCI soft state
502 pci_set_drvdata(pdev, adapter);
503
504 // attach with scsi mid-layer
505 if (megaraid_io_attach(adapter) != 0) {
506
507 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
508
509 goto out_cmm_unreg;
510 }
511
512 return 0;
513
514out_cmm_unreg:
515 pci_set_drvdata(pdev, NULL);
516 megaraid_cmm_unregister(adapter);
517out_fini_mbox:
518 megaraid_fini_mbox(adapter);
519out_free_adapter:
520 kfree(adapter);
521out_probe_one:
522 pci_disable_device(pdev);
523
524 return -ENODEV;
525}
526
527
528/**
529 * megaraid_detach_one - release the framework resources and call LLD release
530 * routine
531 * @param pdev : handle for our PCI cofiguration space
532 *
533 * This routine is called during driver unload. We free all the allocated
534 * resources and call the corresponding LLD so that it can also release all
535 * its resources.
536 *
537 * This routine is also called from the PCI hotplug system
538 **/
539static void
540megaraid_detach_one(struct pci_dev *pdev)
541{
542 adapter_t *adapter;
543 struct Scsi_Host *host;
544
545
546 // Start a rollback on this adapter
547 adapter = pci_get_drvdata(pdev);
548
549 if (!adapter) {
550 con_log(CL_ANN, (KERN_CRIT
551 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
552 pdev->vendor, pdev->device, pdev->subsystem_vendor,
553 pdev->subsystem_device));
554
555 return;
556 }
557 else {
558 con_log(CL_ANN, (KERN_NOTICE
559 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
560 pdev->vendor, pdev->device, pdev->subsystem_vendor,
561 pdev->subsystem_device));
562 }
563
564
565 host = adapter->host;
566
567 // do not allow any more requests from the management module for this
568 // adapter.
569 // FIXME: How do we account for the request which might still be
570 // pending with us?
571 atomic_set(&adapter->being_detached, 1);
572
573 // detach from the IO sub-system
574 megaraid_io_detach(adapter);
575
576 // reset the device state in the PCI structure. We check this
577 // condition when we enter here. If the device state is NULL,
578 // that would mean the device has already been removed
579 pci_set_drvdata(pdev, NULL);
580
581 // Unregister from common management module
582 //
583 // FIXME: this must return success or failure for conditions if there
584 // is a command pending with LLD or not.
585 megaraid_cmm_unregister(adapter);
586
587 // finalize the mailbox based controller and release all resources
588 megaraid_fini_mbox(adapter);
589
590 kfree(adapter);
591
592 scsi_host_put(host);
593
594 pci_disable_device(pdev);
595
596 return;
597}
598
599
600/**
601 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
602 * @param device : generice driver model device
603 *
604 * Shutdown notification, perform flush cache
605 */
606static void
5457b6a6 607megaraid_mbox_shutdown(struct pci_dev *pdev)
1da177e4 608{
5457b6a6 609 adapter_t *adapter = pci_get_drvdata(pdev);
1da177e4
LT		 610 static int counter;
611
612 if (!adapter) {
613 con_log(CL_ANN, (KERN_WARNING
614 "megaraid: null device in shutdown\n"));
615 return;
616 }
617
618 // flush caches now
619 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
620 counter++));
621
622 megaraid_mbox_flush_cache(adapter);
623
624 con_log(CL_ANN, ("done\n"));
625}
626
627
628/**
629 * megaraid_io_attach - attach a device with the IO subsystem
630 * @param adapter : controller's soft state
631 *
632 * Attach this device with the IO subsystem
633 **/
634static int
635megaraid_io_attach(adapter_t *adapter)
636{
637 struct Scsi_Host *host;
638
639 // Initialize SCSI Host structure
640 host = scsi_host_alloc(&megaraid_template_g, 8);
641 if (!host) {
642 con_log(CL_ANN, (KERN_WARNING
643 "megaraid mbox: scsi_register failed\n"));
644
645 return -1;
646 }
647
648 SCSIHOST2ADAP(host) = (caddr_t)adapter;
649 adapter->host = host;
650
1da177e4
LT		 651 host->irq = adapter->irq;
652 host->unique_id = adapter->unique_id;
653 host->can_queue = adapter->max_cmds;
654 host->this_id = adapter->init_id;
655 host->sg_tablesize = adapter->sglen;
656 host->max_sectors = adapter->max_sectors;
657 host->cmd_per_lun = adapter->cmd_per_lun;
658 host->max_channel = adapter->max_channel;
659 host->max_id = adapter->max_target;
660 host->max_lun = adapter->max_lun;
661
662
663 // notify mid-layer about the new controller
664 if (scsi_add_host(host, &adapter->pdev->dev)) {
665
666 con_log(CL_ANN, (KERN_WARNING
667 "megaraid mbox: scsi_add_host failed\n"));
668
669 scsi_host_put(host);
670
671 return -1;
672 }
673
674 scsi_scan_host(host);
675
676 return 0;
677}
678
679
680/**
681 * megaraid_io_detach - detach a device from the IO subsystem
682 * @param adapter : controller's soft state
683 *
684 * Detach this device from the IO subsystem
685 **/
686static void
687megaraid_io_detach(adapter_t *adapter)
688{
689 struct Scsi_Host *host;
690
691 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
692
693 host = adapter->host;
694
695 scsi_remove_host(host);
696
697 return;
698}
699
700
701/*
702 * START: Mailbox Low Level Driver
703 *
704 * This is section specific to the single mailbox based controllers
705 */
706
707/**
708 * megaraid_init_mbox - initialize controller
709 * @param adapter - our soft state
710 *
711 * . Allocate 16-byte aligned mailbox memory for firmware handshake
712 * . Allocate controller's memory resources
713 * . Find out all initialization data
714 * . Allocate memory required for all the commands
715 * . Use internal library of FW routines, build up complete soft state
716 */
cedfb178 717static int __devinit
1da177e4
LT		 718megaraid_init_mbox(adapter_t *adapter)
719{
720 struct pci_dev *pdev;
721 mraid_device_t *raid_dev;
722 int i;
fbf60802 723 uint32_t magic64;
1da177e4
LT		 724
725
726 adapter->ito = MBOX_TIMEOUT;
727 pdev = adapter->pdev;
728
729 /*
730 * Allocate and initialize the init data structure for mailbox
731 * controllers
732 */
733 raid_dev = kmalloc(sizeof(mraid_device_t), GFP_KERNEL);
734 if (raid_dev == NULL) return -1;
735
736 memset(raid_dev, 0, sizeof(mraid_device_t));
737
738 /*
739 * Attach the adapter soft state to raid device soft state
740 */
741 adapter->raid_device = (caddr_t)raid_dev;
742 raid_dev->fast_load = megaraid_fast_load;
743
744
745 // our baseport
746 raid_dev->baseport = pci_resource_start(pdev, 0);
747
748 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
749
750 con_log(CL_ANN, (KERN_WARNING
751 "megaraid: mem region busy\n"));
752
753 goto out_free_raid_dev;
754 }
755
756 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
757
758 if (!raid_dev->baseaddr) {
759
760 con_log(CL_ANN, (KERN_WARNING
761 "megaraid: could not map hba memory\n") );
762
763 goto out_release_regions;
764 }
765
766 //
767 // Setup the rest of the soft state using the library of FW routines
768 //
769
770 // request IRQ and register the interrupt service routine
1d6f359a 771 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
1da177e4
LT		 772 adapter)) {
773
774 con_log(CL_ANN, (KERN_WARNING
775 "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
776
777 goto out_iounmap;
778 }
779
780
781 // initialize the mutual exclusion lock for the mailbox
782 spin_lock_init(&raid_dev->mailbox_lock);
783
784 // allocate memory required for commands
785 if (megaraid_alloc_cmd_packets(adapter) != 0) {
786 goto out_free_irq;
787 }
788
789 // Product info
790 if (megaraid_mbox_product_info(adapter) != 0) {
791 goto out_alloc_cmds;
792 }
793
794 // Do we support extended CDBs
795 adapter->max_cdb_sz = 10;
796 if (megaraid_mbox_extended_cdb(adapter) == 0) {
797 adapter->max_cdb_sz = 16;
798 }
799
800 /*
801 * Do we support cluster environment, if we do, what is the initiator
802 * id.
803 * NOTE: In a non-cluster aware firmware environment, the LLD should
804 * return 7 as initiator id.
805 */
806 adapter->ha = 0;
807 adapter->init_id = -1;
808 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
809 adapter->ha = 1;
810 }
811
812 /*
813 * Prepare the device ids array to have the mapping between the kernel
814 * device address and megaraid device address.
815 * We export the physical devices on their actual addresses. The
816 * logical drives are exported on a virtual SCSI channel
817 */
818 megaraid_mbox_setup_device_map(adapter);
819
820 // If the firmware supports random deletion, update the device id map
821 if (megaraid_mbox_support_random_del(adapter)) {
822
823 // Change the logical drives numbers in device_ids array one
824 // slot in device_ids is reserved for target id, that's why
825 // "<=" below
826 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
827 adapter->device_ids[adapter->max_channel][i] += 0x80;
828 }
829 adapter->device_ids[adapter->max_channel][adapter->init_id] =
830 0xFF;
831
832 raid_dev->random_del_supported = 1;
833 }
834
835 /*
836 * find out the maximum number of scatter-gather elements supported by
837 * this firmware
838 */
839 adapter->sglen = megaraid_mbox_get_max_sg(adapter);
840
841 // enumerate RAID and SCSI channels so that all devices on SCSI
842 // channels can later be exported, including disk devices
843 megaraid_mbox_enum_raid_scsi(adapter);
844
845 /*
846 * Other parameters required by upper layer
847 *
848 * maximum number of sectors per IO command
849 */
850 adapter->max_sectors = megaraid_max_sectors;
851
852 /*
853 * number of queued commands per LUN.
854 */
855 adapter->cmd_per_lun = megaraid_cmd_per_lun;
856
857 /*
858 * Allocate resources required to issue FW calls, when sysfs is
859 * accessed
860 */
861 if (megaraid_sysfs_alloc_resources(adapter) != 0) {
862 goto out_alloc_cmds;
863 }
864
865 // Set the DMA mask to 64-bit. All supported controllers as capable of
866 // DMA in this range
fbf60802
JS		 867 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
868
869 if (((magic64 == HBA_SIGNATURE_64_BIT) &&
870 ((adapter->pdev->subsystem_device !=
871 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) ||
872 (adapter->pdev->subsystem_device !=
873 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
874 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
875 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
876 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
877 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
878 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
879 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
880 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
881 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
882 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
883 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
884 if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK)) {
885 con_log(CL_ANN, (KERN_WARNING
886 "megaraid: DMA mask for 64-bit failed\n"));
887
888 if (pci_set_dma_mask (adapter->pdev, DMA_32BIT_MASK)) {
889 con_log(CL_ANN, (KERN_WARNING
890 "megaraid: 32-bit DMA mask failed\n"));
891 goto out_free_sysfs_res;
892 }
893 }
1da177e4
LT		 894 }
895
896 // setup tasklet for DPC
897 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
898 (unsigned long)adapter);
899
900 con_log(CL_DLEVEL1, (KERN_INFO
901 "megaraid mbox hba successfully initialized\n"));
902
903 return 0;
904
905out_free_sysfs_res:
906 megaraid_sysfs_free_resources(adapter);
907out_alloc_cmds:
908 megaraid_free_cmd_packets(adapter);
909out_free_irq:
910 free_irq(adapter->irq, adapter);
911out_iounmap:
912 iounmap(raid_dev->baseaddr);
913out_release_regions:
914 pci_release_regions(pdev);
915out_free_raid_dev:
916 kfree(raid_dev);
917
918 return -1;
919}
920
921
922/**
923 * megaraid_fini_mbox - undo controller initialization
924 * @param adapter : our soft state
925 */
926static void
927megaraid_fini_mbox(adapter_t *adapter)
928{
929 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
930
931 // flush all caches
932 megaraid_mbox_flush_cache(adapter);
933
934 tasklet_kill(&adapter->dpc_h);
935
936 megaraid_sysfs_free_resources(adapter);
937
938 megaraid_free_cmd_packets(adapter);
939
940 free_irq(adapter->irq, adapter);
941
942 iounmap(raid_dev->baseaddr);
943
944 pci_release_regions(adapter->pdev);
945
946 kfree(raid_dev);
947
948 return;
949}
950
951
952/**
953 * megaraid_alloc_cmd_packets - allocate shared mailbox
954 * @param adapter : soft state of the raid controller
955 *
956 * Allocate and align the shared mailbox. This maibox is used to issue
957 * all the commands. For IO based controllers, the mailbox is also regsitered
958 * with the FW. Allocate memory for all commands as well.
959 * This is our big allocator
960 */
961static int
962megaraid_alloc_cmd_packets(adapter_t *adapter)
963{
964 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
965 struct pci_dev *pdev;
966 unsigned long align;
967 scb_t *scb;
968 mbox_ccb_t *ccb;
969 struct mraid_pci_blk *epthru_pci_blk;
970 struct mraid_pci_blk *sg_pci_blk;
971 struct mraid_pci_blk *mbox_pci_blk;
972 int i;
973
974 pdev = adapter->pdev;
975
976 /*
977 * Setup the mailbox
978 * Allocate the common 16-byte aligned memory for the handshake
979 * mailbox.
980 */
981 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
982 sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
983
984 if (!raid_dev->una_mbox64) {
985 con_log(CL_ANN, (KERN_WARNING
986 "megaraid: out of memory, %s %d\n", __FUNCTION__,
987 __LINE__));
988 return -1;
989 }
990 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
991
992 /*
993 * Align the mailbox at 16-byte boundary
994 */
995 raid_dev->mbox = &raid_dev->una_mbox64->mbox32;
996
997 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
998 (~0UL ^ 0xFUL));
999
1000 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
1001
1002 align = ((void *)raid_dev->mbox -
1003 ((void *)&raid_dev->una_mbox64->mbox32));
1004
1005 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1006 align;
1007
1008 // Allocate memory for commands issued internally
1009 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
1010 &adapter->ibuf_dma_h);
1011 if (!adapter->ibuf) {
1012
1013 con_log(CL_ANN, (KERN_WARNING
1014 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1015 __LINE__));
1016
1017 goto out_free_common_mbox;
1018 }
1019 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
1020
1021 // Allocate memory for our SCSI Command Blocks and their associated
1022 // memory
1023
1024 /*
1025 * Allocate memory for the base list of scb. Later allocate memory for
1026 * CCBs and embedded components of each CCB and point the pointers in
1027 * scb to the allocated components
1028 * NOTE: The code to allocate SCB will be duplicated in all the LLD
1029 * since the calling routine does not yet know the number of available
1030 * commands.
1031 */
1032 adapter->kscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_SCSI_CMDS,
1033 GFP_KERNEL);
1034
1035 if (adapter->kscb_list == NULL) {
1036 con_log(CL_ANN, (KERN_WARNING
1037 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1038 __LINE__));
1039 goto out_free_ibuf;
1040 }
1041 memset(adapter->kscb_list, 0, sizeof(scb_t) * MBOX_MAX_SCSI_CMDS);
1042
1043 // memory allocation for our command packets
1044 if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1045 con_log(CL_ANN, (KERN_WARNING
1046 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1047 __LINE__));
1048 goto out_free_scb_list;
1049 }
1050
1051 // Adjust the scb pointers and link in the free pool
1052 epthru_pci_blk = raid_dev->epthru_pool;
1053 sg_pci_blk = raid_dev->sg_pool;
1054 mbox_pci_blk = raid_dev->mbox_pool;
1055
1056 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1057 scb = adapter->kscb_list + i;
1058 ccb = raid_dev->ccb_list + i;
1059
1060 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1061 ccb->raw_mbox = (uint8_t *)ccb->mbox;
1062 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1063 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1064
1065 // make sure the mailbox is aligned properly
1066 if (ccb->mbox_dma_h & 0x0F) {
1067 con_log(CL_ANN, (KERN_CRIT
1068 "megaraid mbox: not aligned on 16-bytes\n"));
1069
1070 goto out_teardown_dma_pools;
1071 }
1072
1073 ccb->epthru = (mraid_epassthru_t *)
1074 epthru_pci_blk[i].vaddr;
1075 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr;
1076 ccb->pthru = (mraid_passthru_t *)ccb->epthru;
1077 ccb->pthru_dma_h = ccb->epthru_dma_h;
1078
1079
1080 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1081 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr;
1082 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64;
1083
1084 scb->ccb = (caddr_t)ccb;
1085 scb->gp = 0;
1086
1087 scb->sno = i; // command index
1088
1089 scb->scp = NULL;
1090 scb->state = SCB_FREE;
1091 scb->dma_direction = PCI_DMA_NONE;
1092 scb->dma_type = MRAID_DMA_NONE;
1093 scb->dev_channel = -1;
1094 scb->dev_target = -1;
1095
1096 // put scb in the free pool
1097 list_add_tail(&scb->list, &adapter->kscb_pool);
1098 }
1099
1100 return 0;
1101
1102out_teardown_dma_pools:
1103 megaraid_mbox_teardown_dma_pools(adapter);
1104out_free_scb_list:
1105 kfree(adapter->kscb_list);
1106out_free_ibuf:
1107 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1108 adapter->ibuf_dma_h);
1109out_free_common_mbox:
1110 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1111 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1112
1113 return -1;
1114}
1115
1116
1117/**
1118 * megaraid_free_cmd_packets - free memory
1119 * @param adapter : soft state of the raid controller
1120 *
1121 * Release memory resources allocated for commands
1122 */
1123static void
1124megaraid_free_cmd_packets(adapter_t *adapter)
1125{
1126 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1127
1128 megaraid_mbox_teardown_dma_pools(adapter);
1129
1130 kfree(adapter->kscb_list);
1131
1132 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1133 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1134
1135 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1136 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1137 return;
1138}
1139
1140
1141/**
1142 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1143 * @param adapter : HBA soft state
1144 *
1145 * setup the dma pools for mailbox, passthru and extended passthru structures,
1146 * and scatter-gather lists
1147 */
1148static int
1149megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1150{
1151 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1152 struct mraid_pci_blk *epthru_pci_blk;
1153 struct mraid_pci_blk *sg_pci_blk;
1154 struct mraid_pci_blk *mbox_pci_blk;
1155 int i;
1156
1157
1158
1159 // Allocate memory for 16-bytes aligned mailboxes
1160 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1161 adapter->pdev,
1162 sizeof(mbox64_t) + 16,
1163 16, 0);
1164
1165 if (raid_dev->mbox_pool_handle == NULL) {
1166 goto fail_setup_dma_pool;
1167 }
1168
1169 mbox_pci_blk = raid_dev->mbox_pool;
1170 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1171 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1172 raid_dev->mbox_pool_handle,
1173 GFP_KERNEL,
1174 &mbox_pci_blk[i].dma_addr);
1175 if (!mbox_pci_blk[i].vaddr) {
1176 goto fail_setup_dma_pool;
1177 }
1178 }
1179
1180 /*
1181 * Allocate memory for each embedded passthru strucuture pointer
1182 * Request for a 128 bytes aligned structure for each passthru command
1183 * structure
1184 * Since passthru and extended passthru commands are exclusive, they
1185 * share common memory pool. Passthru structures piggyback on memory
1186 * allocted to extended passthru since passthru is smaller of the two
1187 */
1188 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1189 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1190
1191 if (raid_dev->epthru_pool_handle == NULL) {
1192 goto fail_setup_dma_pool;
1193 }
1194
1195 epthru_pci_blk = raid_dev->epthru_pool;
1196 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1197 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1198 raid_dev->epthru_pool_handle,
1199 GFP_KERNEL,
1200 &epthru_pci_blk[i].dma_addr);
1201 if (!epthru_pci_blk[i].vaddr) {
1202 goto fail_setup_dma_pool;
1203 }
1204 }
1205
1206
1207 // Allocate memory for each scatter-gather list. Request for 512 bytes
1208 // alignment for each sg list
1209 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1210 adapter->pdev,
1211 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1212 512, 0);
1213
1214 if (raid_dev->sg_pool_handle == NULL) {
1215 goto fail_setup_dma_pool;
1216 }
1217
1218 sg_pci_blk = raid_dev->sg_pool;
1219 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1220 sg_pci_blk[i].vaddr = pci_pool_alloc(
1221 raid_dev->sg_pool_handle,
1222 GFP_KERNEL,
1223 &sg_pci_blk[i].dma_addr);
1224 if (!sg_pci_blk[i].vaddr) {
1225 goto fail_setup_dma_pool;
1226 }
1227 }
1228
1229 return 0;
1230
1231fail_setup_dma_pool:
1232 megaraid_mbox_teardown_dma_pools(adapter);
1233 return -1;
1234}
1235
1236
1237/**
1238 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1239 * @param adapter : HBA soft state
1240 *
1241 * teardown the dma pool for mailbox, passthru and extended passthru
1242 * structures, and scatter-gather lists
1243 */
1244static void
1245megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1246{
1247 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1248 struct mraid_pci_blk *epthru_pci_blk;
1249 struct mraid_pci_blk *sg_pci_blk;
1250 struct mraid_pci_blk *mbox_pci_blk;
1251 int i;
1252
1253
1254 sg_pci_blk = raid_dev->sg_pool;
1255 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1256 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1257 sg_pci_blk[i].dma_addr);
1258 }
1259 if (raid_dev->sg_pool_handle)
1260 pci_pool_destroy(raid_dev->sg_pool_handle);
1261
1262
1263 epthru_pci_blk = raid_dev->epthru_pool;
1264 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1265 pci_pool_free(raid_dev->epthru_pool_handle,
1266 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1267 }
1268 if (raid_dev->epthru_pool_handle)
1269 pci_pool_destroy(raid_dev->epthru_pool_handle);
1270
1271
1272 mbox_pci_blk = raid_dev->mbox_pool;
1273 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1274 pci_pool_free(raid_dev->mbox_pool_handle,
1275 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1276 }
1277 if (raid_dev->mbox_pool_handle)
1278 pci_pool_destroy(raid_dev->mbox_pool_handle);
1279
1280 return;
1281}
1282
1283
1284/**
1285 * megaraid_alloc_scb - detach and return a scb from the free list
1286 * @adapter : controller's soft state
1287 *
1288 * return the scb from the head of the free list. NULL if there are none
1289 * available
1290 **/
858119e1 1291static scb_t *
1da177e4
LT		 1292megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1293{
1294 struct list_head *head = &adapter->kscb_pool;
1295 scb_t *scb = NULL;
1296 unsigned long flags;
1297
1298 // detach scb from free pool
1299 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1300
1301 if (list_empty(head)) {
1302 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1303 return NULL;
1304 }
1305
1306 scb = list_entry(head->next, scb_t, list);
1307 list_del_init(&scb->list);
1308
1309 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1310
1311 scb->state = SCB_ACTIVE;
1312 scb->scp = scp;
1313 scb->dma_type = MRAID_DMA_NONE;
1314
1315 return scb;
1316}
1317
1318
1319/**
1320 * megaraid_dealloc_scb - return the scb to the free pool
1321 * @adapter : controller's soft state
1322 * @scb : scb to be freed
1323 *
1324 * return the scb back to the free list of scbs. The caller must 'flush' the
1325 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1326 * NOTE NOTE: Make sure the scb is not on any list before calling this
1327 * routine.
1328 **/
1329static inline void
1330megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1331{
1332 unsigned long flags;
1333
1334 // put scb in the free pool
1335 scb->state = SCB_FREE;
1336 scb->scp = NULL;
1337 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1338
1339 list_add(&scb->list, &adapter->kscb_pool);
1340
1341 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1342
1343 return;
1344}
1345
1346
1347/**
1348 * megaraid_mbox_mksgl - make the scatter-gather list
1349 * @adapter - controller's soft state
1350 * @scb - scsi control block
1351 *
1352 * prepare the scatter-gather list
1353 */
858119e1 1354static int
1da177e4
LT		 1355megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1356{
1357 struct scatterlist *sgl;
1358 mbox_ccb_t *ccb;
1359 struct page *page;
1360 unsigned long offset;
1361 struct scsi_cmnd *scp;
1362 int sgcnt;
1363 int i;
1364
1365
1366 scp = scb->scp;
1367 ccb = (mbox_ccb_t *)scb->ccb;
1368
1369 // no mapping required if no data to be transferred
1370 if (!scp->request_buffer || !scp->request_bufflen)
1371 return 0;
1372
1373 if (!scp->use_sg) { /* scatter-gather list not used */
1374
1375 page = virt_to_page(scp->request_buffer);
1376
1377 offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK);
1378
1379 ccb->buf_dma_h = pci_map_page(adapter->pdev, page, offset,
1380 scp->request_bufflen,
1381 scb->dma_direction);
1382 scb->dma_type = MRAID_DMA_WBUF;
1383
1384 /*
1385 * We need to handle special 64-bit commands that need a
1386 * minimum of 1 SG
1387 */
1388 sgcnt = 1;
1389 ccb->sgl64[0].address = ccb->buf_dma_h;
1390 ccb->sgl64[0].length = scp->request_bufflen;
1391
1392 return sgcnt;
1393 }
1394
1395 sgl = (struct scatterlist *)scp->request_buffer;
1396
1397 // The number of sg elements returned must not exceed our limit
1398 sgcnt = pci_map_sg(adapter->pdev, sgl, scp->use_sg,
1399 scb->dma_direction);
1400
1401 if (sgcnt > adapter->sglen) {
1402 con_log(CL_ANN, (KERN_CRIT
1403 "megaraid critical: too many sg elements:%d\n",
1404 sgcnt));
1405 BUG();
1406 }
1407
1408 scb->dma_type = MRAID_DMA_WSG;
1409
1410 for (i = 0; i < sgcnt; i++, sgl++) {
1411 ccb->sgl64[i].address = sg_dma_address(sgl);
1412 ccb->sgl64[i].length = sg_dma_len(sgl);
1413 }
1414
1415 // Return count of SG nodes
1416 return sgcnt;
1417}
1418
1419
1420/**
1421 * mbox_post_cmd - issue a mailbox command
1422 * @adapter - controller's soft state
1423 * @scb - command to be issued
1424 *
1425 * post the command to the controller if mailbox is availble.
1426 */
858119e1 1427static int
1da177e4
LT		 1428mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1429{
1430 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1431 mbox64_t *mbox64;
1432 mbox_t *mbox;
1433 mbox_ccb_t *ccb;
1434 unsigned long flags;
1435 unsigned int i = 0;
1436
1437
1438 ccb = (mbox_ccb_t *)scb->ccb;
1439 mbox = raid_dev->mbox;
1440 mbox64 = raid_dev->mbox64;
1441
1442 /*
1443 * Check for busy mailbox. If it is, return failure - the caller
1444 * should retry later.
1445 */
1446 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1447
1448 if (unlikely(mbox->busy)) {
1449 do {
1450 udelay(1);
1451 i++;
1452 rmb();
1453 } while(mbox->busy && (i < max_mbox_busy_wait));
1454
1455 if (mbox->busy) {
1456
1457 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1458
1459 return -1;
1460 }
1461 }
1462
1463
1464 // Copy this command's mailbox data into "adapter's" mailbox
1465 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1466 mbox->cmdid = scb->sno;
1467
1468 adapter->outstanding_cmds++;
1469
1470 if (scb->dma_direction == PCI_DMA_TODEVICE) {
1471 if (!scb->scp->use_sg) { // sg list not used
1472 pci_dma_sync_single_for_device(adapter->pdev,
1473 ccb->buf_dma_h,
1474 scb->scp->request_bufflen,
1475 PCI_DMA_TODEVICE);
1476 }
1477 else {
1478 pci_dma_sync_sg_for_device(adapter->pdev,
1479 scb->scp->request_buffer,
1480 scb->scp->use_sg, PCI_DMA_TODEVICE);
1481 }
1482 }
1483
1484 mbox->busy = 1; // Set busy
1485 mbox->poll = 0;
1486 mbox->ack = 0;
1487 wmb();
1488
1489 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1490
1491 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1492
1493 return 0;
1494}
1495
1496
1497/**
1498 * megaraid_queue_command - generic queue entry point for all LLDs
1499 * @scp : pointer to the scsi command to be executed
1500 * @done : callback routine to be called after the cmd has be completed
1501 *
1502 * Queue entry point for mailbox based controllers.
1503 */
1504static int
1505megaraid_queue_command(struct scsi_cmnd *scp, void (* done)(struct scsi_cmnd *))
1506{
1507 adapter_t *adapter;
1508 scb_t *scb;
1509 int if_busy;
1510
1511 adapter = SCP2ADAPTER(scp);
1512 scp->scsi_done = done;
1513 scp->result = 0;
1514
1da177e4
LT		 1515 /*
1516 * Allocate and build a SCB request
1517 * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1518 * not allocate scb. We will return non-zero status in that case.
1519 * NOTE: scb can be null even though certain commands completed
1520 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1521 * return 0 in that case, and we would do the callback right away.
1522 */
1523 if_busy = 0;
f2c8dc40 1524 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1da177e4
LT		 1525 if (!scb) { // command already completed
1526 done(scp);
1527 return 0;
1528 }
1529
f2c8dc40 1530 megaraid_mbox_runpendq(adapter, scb);
1da177e4
LT		 1531 return if_busy;
1532}
1533
1da177e4
LT		 1534/**
1535 * megaraid_mbox_build_cmd - transform the mid-layer scsi command to megaraid
1536 * firmware lingua
1537 * @adapter - controller's soft state
1538 * @scp - mid-layer scsi command pointer
1539 * @busy - set if request could not be completed because of lack of
1540 * resources
1541 *
1542 * convert the command issued by mid-layer to format understood by megaraid
1543 * firmware. We also complete certain command without sending them to firmware
1544 */
1545static scb_t *
1546megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1547{
1548 mraid_device_t *rdev = ADAP2RAIDDEV(adapter);
1549 int channel;
1550 int target;
1551 int islogical;
1552 mbox_ccb_t *ccb;
1553 mraid_passthru_t *pthru;
1554 mbox64_t *mbox64;
1555 mbox_t *mbox;
1556 scb_t *scb;
1557 char skip[] = "skipping";
1558 char scan[] = "scanning";
1559 char *ss;
1560
1561
1562 /*
1563 * Get the appropriate device map for the device this command is
1564 * intended for
1565 */
1566 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1567
1568 /*
1569 * Logical drive commands
1570 */
1571 if (islogical) {
1572 switch (scp->cmnd[0]) {
1573 case TEST_UNIT_READY:
1574 /*
1575 * Do we support clustering and is the support enabled
1576 * If no, return success always
1577 */
1578 if (!adapter->ha) {
1579 scp->result = (DID_OK << 16);
1580 return NULL;
1581 }
1582
1583 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1584 scp->result = (DID_ERROR << 16);
1585 *busy = 1;
1586 return NULL;
1587 }
1588
1589 scb->dma_direction = scp->sc_data_direction;
1590 scb->dev_channel = 0xFF;
1591 scb->dev_target = target;
1592 ccb = (mbox_ccb_t *)scb->ccb;
1593
1594 /*
1595 * The command id will be provided by the command
1596 * issuance routine
1597 */
1598 ccb->raw_mbox[0] = CLUSTER_CMD;
1599 ccb->raw_mbox[2] = RESERVATION_STATUS;
1600 ccb->raw_mbox[3] = target;
1601
1602 return scb;
1603
1604 case MODE_SENSE:
1605 if (scp->use_sg) {
1606 struct scatterlist *sgl;
1607 caddr_t vaddr;
1608
1609 sgl = (struct scatterlist *)scp->request_buffer;
1610 if (sgl->page) {
1611 vaddr = (caddr_t)
1612 (page_address((&sgl[0])->page)
1613 + (&sgl[0])->offset);
1614
1615 memset(vaddr, 0, scp->cmnd[4]);
1616 }
1617 else {
1618 con_log(CL_ANN, (KERN_WARNING
1619 "megaraid mailbox: invalid sg:%d\n",
1620 __LINE__));
1621 }
1622 }
1623 else {
1624 memset(scp->request_buffer, 0, scp->cmnd[4]);
1625 }
1626 scp->result = (DID_OK << 16);
1627 return NULL;
1628
1629 case INQUIRY:
1630 /*
1631 * Display the channel scan for logical drives
1632 * Do not display scan for a channel if already done.
1633 */
1634 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1635
1636 con_log(CL_ANN, (KERN_INFO
1637 "scsi[%d]: scanning scsi channel %d",
1638 adapter->host->host_no,
1639 SCP2CHANNEL(scp)));
1640
1641 con_log(CL_ANN, (
1642 " [virtual] for logical drives\n"));
1643
1644 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1645 }
1646
1647 /* Fall through */
1648
1649 case READ_CAPACITY:
1650 /*
1651 * Do not allow LUN > 0 for logical drives and
1652 * requests for more than 40 logical drives
1653 */
1654 if (SCP2LUN(scp)) {
1655 scp->result = (DID_BAD_TARGET << 16);
1656 return NULL;
1657 }
1658 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1659 scp->result = (DID_BAD_TARGET << 16);
1660 return NULL;
1661 }
1662
1663
1664 /* Allocate a SCB and initialize passthru */
1665 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1666 scp->result = (DID_ERROR << 16);
1667 *busy = 1;
1668 return NULL;
1669 }
1670
1671 ccb = (mbox_ccb_t *)scb->ccb;
1672 scb->dev_channel = 0xFF;
1673 scb->dev_target = target;
1674 pthru = ccb->pthru;
1675 mbox = ccb->mbox;
1676 mbox64 = ccb->mbox64;
1677
1678 pthru->timeout = 0;
1679 pthru->ars = 1;
1680 pthru->reqsenselen = 14;
1681 pthru->islogical = 1;
1682 pthru->logdrv = target;
1683 pthru->cdblen = scp->cmd_len;
1684 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1685
1686 mbox->cmd = MBOXCMD_PASSTHRU64;
1687 scb->dma_direction = scp->sc_data_direction;
1688
1689 pthru->dataxferlen = scp->request_bufflen;
1690 pthru->dataxferaddr = ccb->sgl_dma_h;
1691 pthru->numsge = megaraid_mbox_mksgl(adapter,
1692 scb);
1693
1694 mbox->xferaddr = 0xFFFFFFFF;
1695 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h;
1696 mbox64->xferaddr_hi = 0;
1697
1698 return scb;
1699
1700 case READ_6:
1701 case WRITE_6:
1702 case READ_10:
1703 case WRITE_10:
1704 case READ_12:
1705 case WRITE_12:
1706
1707 /*
1708 * Allocate a SCB and initialize mailbox
1709 */
1710 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1711 scp->result = (DID_ERROR << 16);
1712 *busy = 1;
1713 return NULL;
1714 }
1715 ccb = (mbox_ccb_t *)scb->ccb;
1716 scb->dev_channel = 0xFF;
1717 scb->dev_target = target;
1718 mbox = ccb->mbox;
1719 mbox64 = ccb->mbox64;
1720 mbox->logdrv = target;
1721
1722 /*
1723 * A little HACK: 2nd bit is zero for all scsi read
1724 * commands and is set for all scsi write commands
1725 */
1726 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64:
1727 MBOXCMD_LREAD64 ;
1728
1729 /*
1730 * 6-byte READ(0x08) or WRITE(0x0A) cdb
1731 */
1732 if (scp->cmd_len == 6) {
1733 mbox->numsectors = (uint32_t)scp->cmnd[4];
1734 mbox->lba =
1735 ((uint32_t)scp->cmnd[1] << 16) |
1736 ((uint32_t)scp->cmnd[2] << 8) |
1737 (uint32_t)scp->cmnd[3];
1738
1739 mbox->lba &= 0x1FFFFF;
1740 }
1741
1742 /*
1743 * 10-byte READ(0x28) or WRITE(0x2A) cdb
1744 */
1745 else if (scp->cmd_len == 10) {
1746 mbox->numsectors =
1747 (uint32_t)scp->cmnd[8] |
1748 ((uint32_t)scp->cmnd[7] << 8);
1749 mbox->lba =
1750 ((uint32_t)scp->cmnd[2] << 24) |
1751 ((uint32_t)scp->cmnd[3] << 16) |
1752 ((uint32_t)scp->cmnd[4] << 8) |
1753 (uint32_t)scp->cmnd[5];
1754 }
1755
1756 /*
1757 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1758 */
1759 else if (scp->cmd_len == 12) {
1760 mbox->lba =
1761 ((uint32_t)scp->cmnd[2] << 24) |
1762 ((uint32_t)scp->cmnd[3] << 16) |
1763 ((uint32_t)scp->cmnd[4] << 8) |
1764 (uint32_t)scp->cmnd[5];
1765
1766 mbox->numsectors =
1767 ((uint32_t)scp->cmnd[6] << 24) |
1768 ((uint32_t)scp->cmnd[7] << 16) |
1769 ((uint32_t)scp->cmnd[8] << 8) |
1770 (uint32_t)scp->cmnd[9];
1771 }
1772 else {
1773 con_log(CL_ANN, (KERN_WARNING
1774 "megaraid: unsupported CDB length\n"));
1775
1776 megaraid_dealloc_scb(adapter, scb);
1777
1778 scp->result = (DID_ERROR << 16);
1779 return NULL;
1780 }
1781
1782 scb->dma_direction = scp->sc_data_direction;
1783
1784 // Calculate Scatter-Gather info
1785 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h;
1786 mbox->numsge = megaraid_mbox_mksgl(adapter,
1787 scb);
1788 mbox->xferaddr = 0xFFFFFFFF;
1789 mbox64->xferaddr_hi = 0;
1790
1791 return scb;
1792
1793 case RESERVE:
1794 case RELEASE:
1795 /*
1796 * Do we support clustering and is the support enabled
1797 */
1798 if (!adapter->ha) {
1799 scp->result = (DID_BAD_TARGET << 16);
1800 return NULL;
1801 }
1802
1803 /*
1804 * Allocate a SCB and initialize mailbox
1805 */
1806 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1807 scp->result = (DID_ERROR << 16);
1808 *busy = 1;
1809 return NULL;
1810 }
1811
1812 ccb = (mbox_ccb_t *)scb->ccb;
1813 scb->dev_channel = 0xFF;
1814 scb->dev_target = target;
1815 ccb->raw_mbox[0] = CLUSTER_CMD;
1816 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ?
1817 RESERVE_LD : RELEASE_LD;
1818
1819 ccb->raw_mbox[3] = target;
1820 scb->dma_direction = scp->sc_data_direction;
1821
1822 return scb;
1823
1824 default:
1825 scp->result = (DID_BAD_TARGET << 16);
1826 return NULL;
1827 }
1828 }
1829 else { // Passthru device commands
1830
1831 // Do not allow access to target id > 15 or LUN > 7
1832 if (target > 15 || SCP2LUN(scp) > 7) {
1833 scp->result = (DID_BAD_TARGET << 16);
1834 return NULL;
1835 }
1836
1837 // if fast load option was set and scan for last device is
1838 // over, reset the fast_load flag so that during a possible
1839 // next scan, devices can be made available
1840 if (rdev->fast_load && (target == 15) &&
1841 (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1842
1843 con_log(CL_ANN, (KERN_INFO
1844 "megaraid[%d]: physical device scan re-enabled\n",
1845 adapter->host->host_no));
1846 rdev->fast_load = 0;
1847 }
1848
1849 /*
1850 * Display the channel scan for physical devices
1851 */
1852 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1853
1854 ss = rdev->fast_load ? skip : scan;
1855
1856 con_log(CL_ANN, (KERN_INFO
1857 "scsi[%d]: %s scsi channel %d [Phy %d]",
1858 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1859 channel));
1860
1861 con_log(CL_ANN, (
1862 " for non-raid devices\n"));
1863
1864 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1865 }
1866
1867 // disable channel sweep if fast load option given
1868 if (rdev->fast_load) {
1869 scp->result = (DID_BAD_TARGET << 16);
1870 return NULL;
1871 }
1872
1873 // Allocate a SCB and initialize passthru
1874 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1875 scp->result = (DID_ERROR << 16);
1876 *busy = 1;
1877 return NULL;
1878 }
1879
1880 ccb = (mbox_ccb_t *)scb->ccb;
1881 scb->dev_channel = channel;
1882 scb->dev_target = target;
1883 scb->dma_direction = scp->sc_data_direction;
1884 mbox = ccb->mbox;
1885 mbox64 = ccb->mbox64;
1886
1887 // Does this firmware support extended CDBs
1888 if (adapter->max_cdb_sz == 16) {
1889 mbox->cmd = MBOXCMD_EXTPTHRU;
1890
1891 megaraid_mbox_prepare_epthru(adapter, scb, scp);
1892
1893 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h;
1894 mbox64->xferaddr_hi = 0;
1895 mbox->xferaddr = 0xFFFFFFFF;
1896 }
1897 else {
1898 mbox->cmd = MBOXCMD_PASSTHRU64;
1899
1900 megaraid_mbox_prepare_pthru(adapter, scb, scp);
1901
1902 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h;
1903 mbox64->xferaddr_hi = 0;
1904 mbox->xferaddr = 0xFFFFFFFF;
1905 }
1906 return scb;
1907 }
1908
1909 // NOT REACHED
1910}
1911
1912
1913/**
1914 * megaraid_mbox_runpendq - execute commands queued in the pending queue
1915 * @adapter : controller's soft state
1916 * @scb : SCB to be queued in the pending list
1917 *
1918 * scan the pending list for commands which are not yet issued and try to
1919 * post to the controller. The SCB can be a null pointer, which would indicate
1920 * no SCB to be queue, just try to execute the ones in the pending list.
1921 *
1922 * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1923 * out from the head of the pending list. If it is successfully issued, the
1924 * next SCB is at the head now.
1925 */
1926static void
1927megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1928{
1929 scb_t *scb;
1930 unsigned long flags;
1931
1932 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1933
1934 if (scb_q) {
1935 scb_q->state = SCB_PENDQ;
1936 list_add_tail(&scb_q->list, &adapter->pend_list);
1937 }
1938
1939 // if the adapter in not in quiescent mode, post the commands to FW
1940 if (adapter->quiescent) {
1941 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1942 return;
1943 }
1944
1945 while (!list_empty(&adapter->pend_list)) {
1946
1947 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1948
1949 scb = list_entry(adapter->pend_list.next, scb_t, list);
1950
1951 // remove the scb from the pending list and try to
1952 // issue. If we are unable to issue it, put back in
1953 // the pending list and return
1954
1955 list_del_init(&scb->list);
1956
1957 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1958
1959 // if mailbox was busy, return SCB back to pending
1960 // list. Make sure to add at the head, since that's
1961 // where it would have been removed from
1962
1963 scb->state = SCB_ISSUED;
1964
1965 if (mbox_post_cmd(adapter, scb) != 0) {
1966
1967 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1968
1969 scb->state = SCB_PENDQ;
1970
1971 list_add(&scb->list, &adapter->pend_list);
1972
1973 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1974 flags);
1975
1976 return;
1977 }
1978
1979 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1980 }
1981
1982 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1983
1984
1985 return;
1986}
1987
1988
1989/**
1990 * megaraid_mbox_prepare_pthru - prepare a command for physical devices
1991 * @adapter - pointer to controller's soft state
1992 * @scb - scsi control block
1993 * @scp - scsi command from the mid-layer
1994 *
1995 * prepare a command for the scsi physical devices
1996 */
1997static void
1998megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1999 struct scsi_cmnd *scp)
2000{
2001 mbox_ccb_t *ccb;
2002 mraid_passthru_t *pthru;
2003 uint8_t channel;
2004 uint8_t target;
2005
2006 ccb = (mbox_ccb_t *)scb->ccb;
2007 pthru = ccb->pthru;
2008 channel = scb->dev_channel;
2009 target = scb->dev_target;
2010
2011 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2012 pthru->timeout = 4;
2013 pthru->ars = 1;
2014 pthru->islogical = 0;
2015 pthru->channel = 0;
2016 pthru->target = (channel << 4) | target;
2017 pthru->logdrv = SCP2LUN(scp);
2018 pthru->reqsenselen = 14;
2019 pthru->cdblen = scp->cmd_len;
2020
2021 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2022
2023 if (scp->request_bufflen) {
2024 pthru->dataxferlen = scp->request_bufflen;
2025 pthru->dataxferaddr = ccb->sgl_dma_h;
2026 pthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2027 }
2028 else {
2029 pthru->dataxferaddr = 0;
2030 pthru->dataxferlen = 0;
2031 pthru->numsge = 0;
2032 }
2033 return;
2034}
2035
2036
2037/**
2038 * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2039 * @adapter - pointer to controller's soft state
2040 * @scb - scsi control block
2041 * @scp - scsi command from the mid-layer
2042 *
2043 * prepare a command for the scsi physical devices. This rountine prepares
2044 * commands for devices which can take extended CDBs (>10 bytes)
2045 */
2046static void
2047megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2048 struct scsi_cmnd *scp)
2049{
2050 mbox_ccb_t *ccb;
2051 mraid_epassthru_t *epthru;
2052 uint8_t channel;
2053 uint8_t target;
2054
2055 ccb = (mbox_ccb_t *)scb->ccb;
2056 epthru = ccb->epthru;
2057 channel = scb->dev_channel;
2058 target = scb->dev_target;
2059
2060 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2061 epthru->timeout = 4;
2062 epthru->ars = 1;
2063 epthru->islogical = 0;
2064 epthru->channel = 0;
2065 epthru->target = (channel << 4) | target;
2066 epthru->logdrv = SCP2LUN(scp);
2067 epthru->reqsenselen = 14;
2068 epthru->cdblen = scp->cmd_len;
2069
2070 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2071
2072 if (scp->request_bufflen) {
2073 epthru->dataxferlen = scp->request_bufflen;
2074 epthru->dataxferaddr = ccb->sgl_dma_h;
2075 epthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2076 }
2077 else {
2078 epthru->dataxferaddr = 0;
2079 epthru->dataxferlen = 0;
2080 epthru->numsge = 0;
2081 }
2082 return;
2083}
2084
2085
2086/**
2087 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2088 * @adapter - controller's soft state
2089 *
2090 * Interrupt ackrowledgement sequence for memory mapped HBAs. Find out the
2091 * completed command and put them on the completed list for later processing.
2092 *
2093 * Returns: 1 if the interrupt is valid, 0 otherwise
2094 */
858119e1 2095static int
1da177e4
LT		 2096megaraid_ack_sequence(adapter_t *adapter)
2097{
2098 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2099 mbox_t *mbox;
2100 scb_t *scb;
2101 uint8_t nstatus;
2102 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS];
2103 struct list_head clist;
2104 int handled;
2105 uint32_t dword;
2106 unsigned long flags;
2107 int i, j;
2108
2109
2110 mbox = raid_dev->mbox;
2111
2112 // move the SCBs from the firmware completed array to our local list
2113 INIT_LIST_HEAD(&clist);
2114
2115 // loop till F/W has more commands for us to complete
2116 handled = 0;
2117 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2118 do {
2119 /*
2120 * Check if a valid interrupt is pending. If found, force the
2121 * interrupt line low.
2122 */
2123 dword = RDOUTDOOR(raid_dev);
2124 if (dword != 0x10001234) break;
2125
2126 handled = 1;
2127
2128 WROUTDOOR(raid_dev, 0x10001234);
2129
2130 nstatus = 0;
2131 // wait for valid numstatus to post
2132 for (i = 0; i < 0xFFFFF; i++) {
2133 if (mbox->numstatus != 0xFF) {
2134 nstatus = mbox->numstatus;
2135 break;
2136 }
2137 rmb();
2138 }
2139 mbox->numstatus = 0xFF;
2140
2141 adapter->outstanding_cmds -= nstatus;
2142
2143 for (i = 0; i < nstatus; i++) {
2144
2145 // wait for valid command index to post
2146 for (j = 0; j < 0xFFFFF; j++) {
2147 if (mbox->completed[i] != 0xFF) break;
2148 rmb();
2149 }
2150 completed[i] = mbox->completed[i];
2151 mbox->completed[i] = 0xFF;
2152
2153 if (completed[i] == 0xFF) {
2154 con_log(CL_ANN, (KERN_CRIT
2155 "megaraid: command posting timed out\n"));
2156
2157 BUG();
2158 continue;
2159 }
2160
2161 // Get SCB associated with this command id
2162 if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2163 // a cmm command
2164 scb = adapter->uscb_list + (completed[i] -
2165 MBOX_MAX_SCSI_CMDS);
2166 }
2167 else {
2168 // an os command
2169 scb = adapter->kscb_list + completed[i];
2170 }
2171
2172 scb->status = mbox->status;
2173 list_add_tail(&scb->list, &clist);
2174 }
2175
2176 // Acknowledge interrupt
2177 WRINDOOR(raid_dev, 0x02);
2178
2179 } while(1);
2180
2181 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2182
2183
2184 // put the completed commands in the completed list. DPC would
2185 // complete these commands later
2186 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2187
2188 list_splice(&clist, &adapter->completed_list);
2189
2190 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2191
2192
2193 // schedule the DPC if there is some work for it
2194 if (handled)
2195 tasklet_schedule(&adapter->dpc_h);
2196
2197 return handled;
2198}
2199
2200
2201/**
2202 * megaraid_isr - isr for memory based mailbox based controllers
2203 * @irq - irq
2204 * @devp - pointer to our soft state
2205 * @regs - unused
2206 *
2207 * Interrupt service routine for memory-mapped mailbox controllers.
2208 */
2209static irqreturn_t
2210megaraid_isr(int irq, void *devp, struct pt_regs *regs)
2211{
2212 adapter_t *adapter = devp;
2213 int handled;
2214
2215 handled = megaraid_ack_sequence(adapter);
2216
2217 /* Loop through any pending requests */
2218 if (!adapter->quiescent) {
2219 megaraid_mbox_runpendq(adapter, NULL);
2220 }
2221
2222 return IRQ_RETVAL(handled);
2223}
2224
2225
2226/**
2227 * megaraid_mbox_sync_scb - sync kernel buffers
2228 * @adapter : controller's soft state
2229 * @scb : pointer to the resource packet
2230 *
2231 * DMA sync if required.
2232 */
858119e1 2233static void
1da177e4
LT		 2234megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2235{
2236 mbox_ccb_t *ccb;
2237
2238 ccb = (mbox_ccb_t *)scb->ccb;
2239
2240 switch (scb->dma_type) {
2241
2242 case MRAID_DMA_WBUF:
2243 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2244 pci_dma_sync_single_for_cpu(adapter->pdev,
2245 ccb->buf_dma_h,
2246 scb->scp->request_bufflen,
2247 PCI_DMA_FROMDEVICE);
2248 }
2249
2250 pci_unmap_page(adapter->pdev, ccb->buf_dma_h,
2251 scb->scp->request_bufflen, scb->dma_direction);
2252
2253 break;
2254
2255 case MRAID_DMA_WSG:
2256 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2257 pci_dma_sync_sg_for_cpu(adapter->pdev,
2258 scb->scp->request_buffer,
2259 scb->scp->use_sg, PCI_DMA_FROMDEVICE);
2260 }
2261
2262 pci_unmap_sg(adapter->pdev, scb->scp->request_buffer,
2263 scb->scp->use_sg, scb->dma_direction);
2264
2265 break;
2266
2267 default:
2268 break;
2269 }
2270
2271 return;
2272}
2273
2274
2275/**
2276 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2277 * @devp : pointer to HBA soft state
2278 *
2279 * Pick up the commands from the completed list and send back to the owners.
2280 * This is a reentrant function and does not assume any locks are held while
2281 * it is being called.
2282 */
2283static void
2284megaraid_mbox_dpc(unsigned long devp)
2285{
2286 adapter_t *adapter = (adapter_t *)devp;
2287 mraid_device_t *raid_dev;
2288 struct list_head clist;
2289 struct scatterlist *sgl;
2290 scb_t *scb;
2291 scb_t *tmp;
2292 struct scsi_cmnd *scp;
2293 mraid_passthru_t *pthru;
2294 mraid_epassthru_t *epthru;
2295 mbox_ccb_t *ccb;
2296 int islogical;
2297 int pdev_index;
2298 int pdev_state;
2299 mbox_t *mbox;
2300 unsigned long flags;
2301 uint8_t c;
2302 int status;
c005fb4f 2303 uioc_t *kioc;
1da177e4
LT		 2304
2305
2306 if (!adapter) return;
2307
2308 raid_dev = ADAP2RAIDDEV(adapter);
2309
2310 // move the SCBs from the completed list to our local list
2311 INIT_LIST_HEAD(&clist);
2312
2313 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2314
2315 list_splice_init(&adapter->completed_list, &clist);
2316
2317 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2318
2319
2320 list_for_each_entry_safe(scb, tmp, &clist, list) {
2321
2322 status = scb->status;
2323 scp = scb->scp;
2324 ccb = (mbox_ccb_t *)scb->ccb;
2325 pthru = ccb->pthru;
2326 epthru = ccb->epthru;
2327 mbox = ccb->mbox;
2328
2329 // Make sure f/w has completed a valid command
2330 if (scb->state != SCB_ISSUED) {
2331 con_log(CL_ANN, (KERN_CRIT
2332 "megaraid critical err: invalid command %d:%d:%p\n",
2333 scb->sno, scb->state, scp));
2334 BUG();
2335 continue; // Must never happen!
2336 }
2337
2338 // check for the management command and complete it right away
2339 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2340 scb->state = SCB_FREE;
2341 scb->status = status;
2342
2343 // remove from local clist
2344 list_del_init(&scb->list);
2345
c005fb4f
JS		 2346 kioc = (uioc_t *)scb->gp;
2347 kioc->status = 0;
2348
1da177e4
LT		 2349 megaraid_mbox_mm_done(adapter, scb);
2350
2351 continue;
2352 }
2353
2354 // Was an abort issued for this command earlier
2355 if (scb->state & SCB_ABORT) {
2356 con_log(CL_ANN, (KERN_NOTICE
2357 "megaraid: aborted cmd %lx[%x] completed\n",
2358 scp->serial_number, scb->sno));
2359 }
2360
2361 /*
2362 * If the inquiry came of a disk drive which is not part of
2363 * any RAID array, expose it to the kernel. For this to be
2364 * enabled, user must set the "megaraid_expose_unconf_disks"
2365 * flag to 1 by specifying it on module parameter list.
2366 * This would enable data migration off drives from other
2367 * configurations.
2368 */
2369 islogical = MRAID_IS_LOGICAL(adapter, scp);
2370 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2371 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2372
2373 if (scp->use_sg) {
2374 sgl = (struct scatterlist *)
2375 scp->request_buffer;
2376
2377 if (sgl->page) {
2378 c = *(unsigned char *)
2379 (page_address((&sgl[0])->page) +
2380 (&sgl[0])->offset);
2381 }
2382 else {
2383 con_log(CL_ANN, (KERN_WARNING
2384 "megaraid mailbox: invalid sg:%d\n",
2385 __LINE__));
2386 c = 0;
2387 }
2388 }
2389 else {
2390 c = *(uint8_t *)scp->request_buffer;
2391 }
2392
2393 if ((c & 0x1F ) == TYPE_DISK) {
2394 pdev_index = (scb->dev_channel * 16) +
2395 scb->dev_target;
2396 pdev_state =
2397 raid_dev->pdrv_state[pdev_index] & 0x0F;
2398
2399 if (pdev_state == PDRV_ONLINE ||
2400 pdev_state == PDRV_FAILED ||
2401 pdev_state == PDRV_RBLD ||
2402 pdev_state == PDRV_HOTSPARE ||
2403 megaraid_expose_unconf_disks == 0) {
2404
2405 status = 0xF0;
2406 }
2407 }
2408 }
2409
2410 // Convert MegaRAID status to Linux error code
2411 switch (status) {
2412
2413 case 0x00:
2414
2415 scp->result = (DID_OK << 16);
2416 break;
2417
2418 case 0x02:
2419
2420 /* set sense_buffer and result fields */
2421 if (mbox->cmd == MBOXCMD_PASSTHRU ||
2422 mbox->cmd == MBOXCMD_PASSTHRU64) {
2423
2424 memcpy(scp->sense_buffer, pthru->reqsensearea,
2425 14);
2426
2427 scp->result = DRIVER_SENSE << 24 |
2428 DID_OK << 16 | CHECK_CONDITION << 1;
2429 }
2430 else {
2431 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2432
2433 memcpy(scp->sense_buffer,
2434 epthru->reqsensearea, 14);
2435
2436 scp->result = DRIVER_SENSE << 24 |
2437 DID_OK << 16 |
2438 CHECK_CONDITION << 1;
2439 } else {
2440 scp->sense_buffer[0] = 0x70;
2441 scp->sense_buffer[2] = ABORTED_COMMAND;
2442 scp->result = CHECK_CONDITION << 1;
2443 }
2444 }
2445 break;
2446
2447 case 0x08:
2448
2449 scp->result = DID_BUS_BUSY << 16 | status;
2450 break;
2451
2452 default:
2453
2454 /*
2455 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2456 * failed
2457 */
2458 if (scp->cmnd[0] == TEST_UNIT_READY) {
2459 scp->result = DID_ERROR << 16 |
2460 RESERVATION_CONFLICT << 1;
2461 }
2462 else
2463 /*
2464 * Error code returned is 1 if Reserve or Release
2465 * failed or the input parameter is invalid
2466 */
2467 if (status == 1 && (scp->cmnd[0] == RESERVE ||
2468 scp->cmnd[0] == RELEASE)) {
2469
2470 scp->result = DID_ERROR << 16 |
2471 RESERVATION_CONFLICT << 1;
2472 }
2473 else {
2474 scp->result = DID_BAD_TARGET << 16 | status;
2475 }
2476 }
2477
2478 // print a debug message for all failed commands
2479 if (status) {
2480 megaraid_mbox_display_scb(adapter, scb);
2481 }
2482
2483 // Free our internal resources and call the mid-layer callback
2484 // routine
2485 megaraid_mbox_sync_scb(adapter, scb);
2486
2487 // remove from local clist
2488 list_del_init(&scb->list);
2489
2490 // put back in free list
2491 megaraid_dealloc_scb(adapter, scb);
2492
2493 // send the scsi packet back to kernel
1da177e4 2494 scp->scsi_done(scp);
1da177e4
LT		 2495 }
2496
2497 return;
2498}
2499
2500
2501/**
2502 * megaraid_abort_handler - abort the scsi command
2503 * @scp : command to be aborted
2504 *
2505 * Abort a previous SCSI request. Only commands on the pending list can be
2506 * aborted. All the commands issued to the F/W must complete.
2507 **/
2508static int
f2c8dc40 2509megaraid_abort_handler(struct scsi_cmnd *scp)
1da177e4
LT		 2510{
2511 adapter_t *adapter;
2512 mraid_device_t *raid_dev;
2513 scb_t *scb;
2514 scb_t *tmp;
2515 int found;
2516 unsigned long flags;
2517 int i;
2518
2519
2520 adapter = SCP2ADAPTER(scp);
2521 raid_dev = ADAP2RAIDDEV(adapter);
2522
1da177e4
LT		 2523 con_log(CL_ANN, (KERN_WARNING
2524 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2525 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2526 SCP2TARGET(scp), SCP2LUN(scp)));
2527
2528 // If FW has stopped responding, simply return failure
2529 if (raid_dev->hw_error) {
2530 con_log(CL_ANN, (KERN_NOTICE
2531 "megaraid: hw error, not aborting\n"));
2532 return FAILED;
2533 }
2534
2535 // There might a race here, where the command was completed by the
2536 // firmware and now it is on the completed list. Before we could
2537 // complete the command to the kernel in dpc, the abort came.
2538 // Find out if this is the case to avoid the race.
2539 scb = NULL;
2540 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2541 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2542
2543 if (scb->scp == scp) { // Found command
2544
2545 list_del_init(&scb->list); // from completed list
2546
2547 con_log(CL_ANN, (KERN_WARNING
2548 "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2549 scp->serial_number, scb->sno,
2550 scb->dev_channel, scb->dev_target));
2551
2552 scp->result = (DID_ABORT << 16);
2553 scp->scsi_done(scp);
2554
2555 megaraid_dealloc_scb(adapter, scb);
2556
2557 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2558 flags);
2559
2560 return SUCCESS;
2561 }
2562 }
2563 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2564
2565
2566 // Find out if this command is still on the pending list. If it is and
2567 // was never issued, abort and return success. If the command is owned
2568 // by the firmware, we must wait for it to complete by the FW.
2569 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2570 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2571
2572 if (scb->scp == scp) { // Found command
2573
2574 list_del_init(&scb->list); // from pending list
2575
2576 ASSERT(!(scb->state & SCB_ISSUED));
2577
2578 con_log(CL_ANN, (KERN_WARNING
2579 "megaraid abort: %ld[%d:%d], driver owner\n",
2580 scp->serial_number, scb->dev_channel,
2581 scb->dev_target));
2582
2583 scp->result = (DID_ABORT << 16);
2584 scp->scsi_done(scp);
2585
2586 megaraid_dealloc_scb(adapter, scb);
2587
2588 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2589 flags);
2590
2591 return SUCCESS;
2592 }
2593 }
2594 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2595
2596
2597 // Check do we even own this command, in which case this would be
2598 // owned by the firmware. The only way to locate the FW scb is to
2599 // traverse through the list of all SCB, since driver does not
2600 // maintain these SCBs on any list
2601 found = 0;
f2c8dc40 2602 spin_lock_irq(&adapter->lock);
1da177e4
LT		 2603 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2604 scb = adapter->kscb_list + i;
2605
2606 if (scb->scp == scp) {
2607
2608 found = 1;
2609
2610 if (!(scb->state & SCB_ISSUED)) {
2611 con_log(CL_ANN, (KERN_WARNING
2612 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2613 scp->serial_number, scb->sno, scb->dev_channel,
2614 scb->dev_target));
2615 BUG();
2616 }
2617 else {
2618 con_log(CL_ANN, (KERN_WARNING
2619 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2620 scp->serial_number, scb->sno, scb->dev_channel,
2621 scb->dev_target));
2622 }
2623 }
2624 }
f2c8dc40 2625 spin_unlock_irq(&adapter->lock);
1da177e4
LT		 2626
2627 if (!found) {
2628 con_log(CL_ANN, (KERN_WARNING
2629 "megaraid abort: scsi cmd:%ld, do now own\n",
2630 scp->serial_number));
2631
2632 // FIXME: Should there be a callback for this command?
2633 return SUCCESS;
2634 }
2635
2636 // We cannot actually abort a command owned by firmware, return
2637 // failure and wait for reset. In host reset handler, we will find out
2638 // if the HBA is still live
2639 return FAILED;
2640}
2641
1da177e4
LT		 2642/**
2643 * megaraid_reset_handler - device reset hadler for mailbox based driver
2644 * @scp : reference command
2645 *
2646 * Reset handler for the mailbox based controller. First try to find out if
2647 * the FW is still live, in which case the outstanding commands counter mut go
2648 * down to 0. If that happens, also issue the reservation reset command to
2649 * relinquish (possible) reservations on the logical drives connected to this
2650 * host
2651 **/
2652static int
f2c8dc40 2653megaraid_reset_handler(struct scsi_cmnd *scp)
1da177e4
LT		 2654{
2655 adapter_t *adapter;
2656 scb_t *scb;
2657 scb_t *tmp;
2658 mraid_device_t *raid_dev;
2659 unsigned long flags;
2660 uint8_t raw_mbox[sizeof(mbox_t)];
2661 int rval;
2662 int recovery_window;
2663 int recovering;
2664 int i;
c005fb4f 2665 uioc_t *kioc;
1da177e4
LT		 2666
2667 adapter = SCP2ADAPTER(scp);
2668 raid_dev = ADAP2RAIDDEV(adapter);
2669
1da177e4
LT		 2670 // return failure if adapter is not responding
2671 if (raid_dev->hw_error) {
2672 con_log(CL_ANN, (KERN_NOTICE
2673 "megaraid: hw error, cannot reset\n"));
2674 return FAILED;
2675 }
2676
2677
2678 // Under exceptional conditions, FW can take up to 3 minutes to
2679 // complete command processing. Wait for additional 2 minutes for the
2680 // pending commands counter to go down to 0. If it doesn't, let the
2681 // controller be marked offline
2682 // Also, reset all the commands currently owned by the driver
2683 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2684 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
1da177e4
LT		 2685 list_del_init(&scb->list); // from pending list
2686
c005fb4f
JS		 2687 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2688 con_log(CL_ANN, (KERN_WARNING
2689 "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2690 scb->sno, scb->dev_channel, scb->dev_target));
1da177e4 2691
c005fb4f 2692 scb->status = -1;
1da177e4 2693
c005fb4f
JS		 2694 kioc = (uioc_t *)scb->gp;
2695 kioc->status = -EFAULT;
2696
2697 megaraid_mbox_mm_done(adapter, scb);
2698 } else {
2699 if (scb->scp == scp) { // Found command
2700 con_log(CL_ANN, (KERN_WARNING
2701 "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2702 scp->serial_number, scb->sno,
2703 scb->dev_channel, scb->dev_target));
2704 } else {
2705 con_log(CL_ANN, (KERN_WARNING
2706 "megaraid: IO packet with %d[%d:%d] being reset\n",
2707 scb->sno, scb->dev_channel, scb->dev_target));
2708 }
2709
2710 scb->scp->result = (DID_RESET << 16);
2711 scb->scp->scsi_done(scb->scp);
2712
2713 megaraid_dealloc_scb(adapter, scb);
2714 }
1da177e4
LT		 2715 }
2716 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2717
2718 if (adapter->outstanding_cmds) {
2719 con_log(CL_ANN, (KERN_NOTICE
2720 "megaraid: %d outstanding commands. Max wait %d sec\n",
c005fb4f
JS		 2721 adapter->outstanding_cmds,
2722 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
1da177e4
LT		 2723 }
2724
1da177e4
LT		 2725 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2726
2727 recovering = adapter->outstanding_cmds;
2728
c005fb4f 2729 for (i = 0; i < recovery_window; i++) {
1da177e4
LT		 2730
2731 megaraid_ack_sequence(adapter);
2732
2733 // print a message once every 5 seconds only
2734 if (!(i % 5)) {
2735 con_log(CL_ANN, (
2736 "megaraid mbox: Wait for %d commands to complete:%d\n",
2737 adapter->outstanding_cmds,
c005fb4f 2738 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
1da177e4
LT		 2739 }
2740
2741 // bailout if no recovery happended in reset time
c005fb4f 2742 if (adapter->outstanding_cmds == 0) {
1da177e4
LT		 2743 break;
2744 }
2745
2746 msleep(1000);
2747 }
2748
f2c8dc40 2749 spin_lock(&adapter->lock);
1da177e4
LT		 2750
2751 // If still outstanding commands, bail out
2752 if (adapter->outstanding_cmds) {
2753 con_log(CL_ANN, (KERN_WARNING
2754 "megaraid mbox: critical hardware error!\n"));
2755
2756 raid_dev->hw_error = 1;
2757
f2c8dc40
CH		 2758 rval = FAILED;
2759 goto out;
1da177e4
LT		 2760 }
2761 else {
2762 con_log(CL_ANN, (KERN_NOTICE
2763 "megaraid mbox: reset sequence completed sucessfully\n"));
2764 }
2765
2766
2767 // If the controller supports clustering, reset reservations
f2c8dc40
CH		 2768 if (!adapter->ha) {
2769 rval = SUCCESS;
2770 goto out;
2771 }
1da177e4
LT		 2772
2773 // clear reservations if any
2774 raw_mbox[0] = CLUSTER_CMD;
2775 raw_mbox[2] = RESET_RESERVATIONS;
2776
2777 rval = SUCCESS;
2778 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2779 con_log(CL_ANN,
2780 (KERN_INFO "megaraid: reservation reset\n"));
2781 }
2782 else {
2783 rval = FAILED;
2784 con_log(CL_ANN, (KERN_WARNING
2785 "megaraid: reservation reset failed\n"));
2786 }
2787
f2c8dc40
CH		 2788 out:
2789 spin_unlock_irq(&adapter->lock);
1da177e4
LT		 2790 return rval;
2791}
2792
1da177e4
LT		 2793/*
2794 * START: internal commands library
2795 *
2796 * This section of the driver has the common routine used by the driver and
2797 * also has all the FW routines
2798 */
2799
2800/**
2801 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2802 * @adapter - controller's soft state
2803 * @raw_mbox - the mailbox
2804 *
2805 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2806 * controllers
2807 */
2808static int
2809mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2810{
2811 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2812 mbox64_t *mbox64;
2813 mbox_t *mbox;
2814 uint8_t status;
2815 int i;
2816
2817
2818 mbox64 = raid_dev->mbox64;
2819 mbox = raid_dev->mbox;
2820
2821 /*
2822 * Wait until mailbox is free
2823 */
2824 if (megaraid_busywait_mbox(raid_dev) != 0)
2825 goto blocked_mailbox;
2826
2827 /*
2828 * Copy mailbox data into host structure
2829 */
2830 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2831 mbox->cmdid = 0xFE;
2832 mbox->busy = 1;
2833 mbox->poll = 0;
2834 mbox->ack = 0;
2835 mbox->numstatus = 0xFF;
2836 mbox->status = 0xFF;
2837
2838 wmb();
2839 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2840
2841 // wait for maximum 1 second for status to post. If the status is not
2842 // available within 1 second, assume FW is initializing and wait
2843 // for an extended amount of time
2844 if (mbox->numstatus == 0xFF) { // status not yet available
53b3531b 2845 udelay(25);
1da177e4
LT		 2846
2847 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2848 rmb();
2849 msleep(1);
2850 }
2851
2852
2853 if (i == 1000) {
2854 con_log(CL_ANN, (KERN_NOTICE
2855 "megaraid mailbox: wait for FW to boot "));
2856
2857 for (i = 0; (mbox->numstatus == 0xFF) &&
2858 (i < MBOX_RESET_WAIT); i++) {
2859 rmb();
2860 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2861 MBOX_RESET_WAIT - i));
2862 msleep(1000);
2863 }
2864
2865 if (i == MBOX_RESET_WAIT) {
2866
2867 con_log(CL_ANN, (
2868 "\nmegaraid mailbox: status not available\n"));
2869
2870 return -1;
2871 }
2872 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2873 }
2874 }
2875
2876 // wait for maximum 1 second for poll semaphore
2877 if (mbox->poll != 0x77) {
2878 udelay(25);
2879
2880 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2881 rmb();
2882 msleep(1);
2883 }
2884
2885 if (i == 1000) {
2886 con_log(CL_ANN, (KERN_WARNING
2887 "megaraid mailbox: could not get poll semaphore\n"));
2888 return -1;
2889 }
2890 }
2891
2892 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2893 wmb();
2894
2895 // wait for maximum 1 second for acknowledgement
2896 if (RDINDOOR(raid_dev) & 0x2) {
2897 udelay(25);
2898
2899 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2900 rmb();
2901 msleep(1);
2902 }
2903
2904 if (i == 1000) {
2905 con_log(CL_ANN, (KERN_WARNING
2906 "megaraid mailbox: could not acknowledge\n"));
2907 return -1;
2908 }
2909 }
2910 mbox->poll = 0;
2911 mbox->ack = 0x77;
2912
2913 status = mbox->status;
2914
2915 // invalidate the completed command id array. After command
2916 // completion, firmware would write the valid id.
2917 mbox->numstatus = 0xFF;
2918 mbox->status = 0xFF;
2919 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2920 mbox->completed[i] = 0xFF;
2921 }
2922
2923 return status;
2924
2925blocked_mailbox:
2926
2927 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2928 return -1;
2929}
2930
2931
2932/**
2933 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2934 * @adapter - controller's soft state
2935 * @raw_mbox - the mailbox
2936 *
2937 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2938 * controllers. This is a faster version of the synchronous command and
2939 * therefore can be called in interrupt-context as well
2940 */
2941static int
2942mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2943{
2944 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2945 mbox_t *mbox;
2946 long i;
2947
2948
2949 mbox = raid_dev->mbox;
2950
2951 // return immediately if the mailbox is busy
2952 if (mbox->busy) return -1;
2953
2954 // Copy mailbox data into host structure
2955 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2956 mbox->cmdid = 0xFE;
2957 mbox->busy = 1;
2958 mbox->poll = 0;
2959 mbox->ack = 0;
2960 mbox->numstatus = 0xFF;
2961 mbox->status = 0xFF;
2962
2963 wmb();
2964 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2965
c005fb4f 2966 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
1da177e4 2967 if (mbox->numstatus != 0xFF) break;
ed7e8ef7 2968 rmb();
c005fb4f 2969 udelay(MBOX_SYNC_DELAY_200);
1da177e4
LT		 2970 }
2971
c005fb4f 2972 if (i == MBOX_SYNC_WAIT_CNT) {
1da177e4
LT		 2973 // We may need to re-calibrate the counter
2974 con_log(CL_ANN, (KERN_CRIT
2975 "megaraid: fast sync command timed out\n"));
2976 }
2977
2978 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2979 wmb();
2980
2981 return mbox->status;
2982}
2983
2984
2985/**
2986 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
2987 * @raid_dev - RAID device (HBA) soft state
2988 *
2989 * wait until the controller's mailbox is available to accept more commands.
2990 * wait for at most 1 second
2991 */
2992static int
2993megaraid_busywait_mbox(mraid_device_t *raid_dev)
2994{
2995 mbox_t *mbox = raid_dev->mbox;
2996 int i = 0;
2997
2998 if (mbox->busy) {
2999 udelay(25);
3000 for (i = 0; mbox->busy && i < 1000; i++)
3001 msleep(1);
3002 }
3003
3004 if (i < 1000) return 0;
3005 else return -1;
3006}
3007
3008
3009/**
3010 * megaraid_mbox_product_info - some static information about the controller
3011 * @adapter - our soft state
3012 *
3013 * issue commands to the controller to grab some parameters required by our
3014 * caller.
3015 */
3016static int
3017megaraid_mbox_product_info(adapter_t *adapter)
3018{
3019 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3020 mbox_t *mbox;
3021 uint8_t raw_mbox[sizeof(mbox_t)];
3022 mraid_pinfo_t *pinfo;
3023 dma_addr_t pinfo_dma_h;
3024 mraid_inquiry3_t *mraid_inq3;
3025 int i;
3026
3027
3028 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3029 mbox = (mbox_t *)raw_mbox;
3030
3031 /*
3032 * Issue an ENQUIRY3 command to find out certain adapter parameters,
3033 * e.g., max channels, max commands etc.
3034 */
3035 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3036 &pinfo_dma_h);
3037
3038 if (pinfo == NULL) {
3039 con_log(CL_ANN, (KERN_WARNING
3040 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3041 __LINE__));
3042
3043 return -1;
3044 }
3045 memset(pinfo, 0, sizeof(mraid_pinfo_t));
3046
3047 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3048 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3049
3050 raw_mbox[0] = FC_NEW_CONFIG;
3051 raw_mbox[2] = NC_SUBOP_ENQUIRY3;
3052 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
3053
3054 // Issue the command
3055 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3056
3057 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3058
3059 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3060 pinfo, pinfo_dma_h);
3061
3062 return -1;
3063 }
3064
3065 /*
3066 * Collect information about state of each physical drive
3067 * attached to the controller. We will expose all the disks
3068 * which are not part of RAID
3069 */
3070 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3071 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3072 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3073 }
3074
3075 /*
3076 * Get product info for information like number of channels,
3077 * maximum commands supported.
3078 */
3079 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3080 mbox->xferaddr = (uint32_t)pinfo_dma_h;
3081
3082 raw_mbox[0] = FC_NEW_CONFIG;
3083 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3084
3085 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3086
3087 con_log(CL_ANN, (KERN_WARNING
3088 "megaraid: product info failed\n"));
3089
3090 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3091 pinfo, pinfo_dma_h);
3092
3093 return -1;
3094 }
3095
3096 /*
3097 * Setup some parameters for host, as required by our caller
3098 */
3099 adapter->max_channel = pinfo->nchannels;
3100
3101 /*
3102 * we will export all the logical drives on a single channel.
3103 * Add 1 since inquires do not come for inititor ID
3104 */
3105 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1;
3106 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices
3107
3108 /*
3109 * These are the maximum outstanding commands for the scsi-layer
3110 */
3111 adapter->max_cmds = MBOX_MAX_SCSI_CMDS;
3112
3113 memset(adapter->fw_version, 0, VERSION_SIZE);
3114 memset(adapter->bios_version, 0, VERSION_SIZE);
3115
3116 memcpy(adapter->fw_version, pinfo->fw_version, 4);
3117 adapter->fw_version[4] = 0;
3118
3119 memcpy(adapter->bios_version, pinfo->bios_version, 4);
3120 adapter->bios_version[4] = 0;
3121
3122 con_log(CL_ANN, (KERN_NOTICE
3123 "megaraid: fw version:[%s] bios version:[%s]\n",
3124 adapter->fw_version, adapter->bios_version));
3125
3126 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3127 pinfo_dma_h);
3128
3129 return 0;
3130}
3131
3132
3133
3134/**
3135 * megaraid_mbox_extended_cdb - check for support for extended CDBs
3136 * @adapter - soft state for the controller
3137 *
3138 * this routine check whether the controller in question supports extended
3139 * ( > 10 bytes ) CDBs
3140 */
3141static int
3142megaraid_mbox_extended_cdb(adapter_t *adapter)
3143{
3144 mbox_t *mbox;
3145 uint8_t raw_mbox[sizeof(mbox_t)];
3146 int rval;
3147
3148 mbox = (mbox_t *)raw_mbox;
3149
3150 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3151 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3152
3153 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3154
3155 raw_mbox[0] = MAIN_MISC_OPCODE;
3156 raw_mbox[2] = SUPPORT_EXT_CDB;
3157
3158 /*
3159 * Issue the command
3160 */
3161 rval = 0;
3162 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3163 rval = -1;
3164 }
3165
3166 return rval;
3167}
3168
3169
3170/**
3171 * megaraid_mbox_support_ha - Do we support clustering
3172 * @adapter - soft state for the controller
3173 * @init_id - ID of the initiator
3174 *
3175 * Determine if the firmware supports clustering and the ID of the initiator.
3176 */
3177static int
3178megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3179{
3180 mbox_t *mbox;
3181 uint8_t raw_mbox[sizeof(mbox_t)];
3182 int rval;
3183
3184
3185 mbox = (mbox_t *)raw_mbox;
3186
3187 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3188
3189 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3190
3191 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3192
3193 raw_mbox[0] = GET_TARGET_ID;
3194
3195 // Issue the command
3196 *init_id = 7;
3197 rval = -1;
3198 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3199
3200 *init_id = *(uint8_t *)adapter->ibuf;
3201
3202 con_log(CL_ANN, (KERN_INFO
3203 "megaraid: cluster firmware, initiator ID: %d\n",
3204 *init_id));
3205
3206 rval = 0;
3207 }
3208
3209 return rval;
3210}
3211
3212
3213/**
3214 * megaraid_mbox_support_random_del - Do we support random deletion
3215 * @adapter - soft state for the controller
3216 *
3217 * Determine if the firmware supports random deletion
3218 * Return: 1 is operation supported, 0 otherwise
3219 */
3220static int
3221megaraid_mbox_support_random_del(adapter_t *adapter)
3222{
3223 mbox_t *mbox;
3224 uint8_t raw_mbox[sizeof(mbox_t)];
3225 int rval;
3226
3227
3228 mbox = (mbox_t *)raw_mbox;
3229
3230 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3231
3232 raw_mbox[0] = FC_DEL_LOGDRV;
3233 raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3234
3235 // Issue the command
3236 rval = 0;
3237 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3238
3239 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3240
3241 rval = 1;
3242 }
3243
3244 return rval;
3245}
3246
3247
3248/**
3249 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3250 * @adapter - soft state for the controller
3251 *
3252 * Find out the maximum number of scatter-gather elements supported by the
3253 * firmware
3254 */
3255static int
3256megaraid_mbox_get_max_sg(adapter_t *adapter)
3257{
3258 mbox_t *mbox;
3259 uint8_t raw_mbox[sizeof(mbox_t)];
3260 int nsg;
3261
3262
3263 mbox = (mbox_t *)raw_mbox;
3264
3265 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3266
3267 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3268
3269 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3270
3271 raw_mbox[0] = MAIN_MISC_OPCODE;
3272 raw_mbox[2] = GET_MAX_SG_SUPPORT;
3273
3274 // Issue the command
3275 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3276 nsg = *(uint8_t *)adapter->ibuf;
3277 }
3278 else {
3279 nsg = MBOX_DEFAULT_SG_SIZE;
3280 }
3281
3282 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3283
3284 return nsg;
3285}
3286
3287
3288/**
3289 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3290 * @adapter - soft state for the controller
3291 *
3292 * Enumerate the RAID and SCSI channels for ROMB platoforms so that channels
3293 * can be exported as regular SCSI channels
3294 */
3295static void
3296megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3297{
3298 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3299 mbox_t *mbox;
3300 uint8_t raw_mbox[sizeof(mbox_t)];
3301
3302
3303 mbox = (mbox_t *)raw_mbox;
3304
3305 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3306
3307 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3308
3309 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3310
3311 raw_mbox[0] = CHNL_CLASS;
3312 raw_mbox[2] = GET_CHNL_CLASS;
3313
3314 // Issue the command. If the command fails, all channels are RAID
3315 // channels
3316 raid_dev->channel_class = 0xFF;
3317 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3318 raid_dev->channel_class = *(uint8_t *)adapter->ibuf;
3319 }
3320
3321 return;
3322}
3323
3324
3325/**
3326 * megaraid_mbox_flush_cache - flush adapter and disks cache
3327 * @param adapter : soft state for the controller
3328 *
3329 * Flush adapter cache followed by disks cache
3330 */
3331static void
3332megaraid_mbox_flush_cache(adapter_t *adapter)
3333{
3334 mbox_t *mbox;
3335 uint8_t raw_mbox[sizeof(mbox_t)];
3336
3337
3338 mbox = (mbox_t *)raw_mbox;
3339
3340 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3341
3342 raw_mbox[0] = FLUSH_ADAPTER;
3343
3344 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3345 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3346 }
3347
3348 raw_mbox[0] = FLUSH_SYSTEM;
3349
3350 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3351 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3352 }
3353
3354 return;
3355}
3356
3357
3358/**
3359 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3360 * @param adapter : controllers' soft state
3361 * @param scb : SCB to be displayed
3362 * @param level : debug level for console print
3363 *
3364 * Diplay information about the given SCB iff the current debug level is
3365 * verbose
3366 */
3367static void
3368megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3369{
3370 mbox_ccb_t *ccb;
3371 struct scsi_cmnd *scp;
3372 mbox_t *mbox;
3373 int level;
3374 int i;
3375
3376
3377 ccb = (mbox_ccb_t *)scb->ccb;
3378 scp = scb->scp;
3379 mbox = ccb->mbox;
3380
3381 level = CL_DLEVEL3;
3382
3383 con_log(level, (KERN_NOTICE
3384 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3385 mbox->cmd, scb->sno));
3386
3387 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3388 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3389 mbox->numsge));
3390
3391 if (!scp) return;
3392
3393 con_log(level, (KERN_NOTICE "scsi cmnd: "));
3394
3395 for (i = 0; i < scp->cmd_len; i++) {
3396 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3397 }
3398
3399 con_log(level, ("\n"));
3400
3401 return;
3402}
3403
3404
3405/**
3406 * megaraid_mbox_setup_device_map - manage device ids
3407 * @adapter : Driver's soft state
3408 *
3409 * Manange the device ids to have an appropraite mapping between the kernel
3410 * scsi addresses and megaraid scsi and logical drive addresses. We export
3411 * scsi devices on their actual addresses, whereas the logical drives are
3412 * exported on a virtual scsi channel.
3413 **/
3414static void
3415megaraid_mbox_setup_device_map(adapter_t *adapter)
3416{
3417 uint8_t c;
3418 uint8_t t;
3419
3420 /*
3421 * First fill the values on the logical drive channel
3422 */
3423 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3424 adapter->device_ids[adapter->max_channel][t] =
3425 (t < adapter->init_id) ? t : t - 1;
3426
3427 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3428
3429 /*
3430 * Fill the values on the physical devices channels
3431 */
3432 for (c = 0; c < adapter->max_channel; c++)
3433 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3434 adapter->device_ids[c][t] = (c << 8) | t;
3435}
3436
3437
3438/*
3439 * END: internal commands library
3440 */
3441
3442/*
3443 * START: Interface for the common management module
3444 *
3445 * This is the module, which interfaces with the common mangement module to
3446 * provide support for ioctl and sysfs
3447 */
3448
3449/**
3450 * megaraid_cmm_register - register with the mangement module
3451 * @param adapter : HBA soft state
3452 *
3453 * Register with the management module, which allows applications to issue
3454 * ioctl calls to the drivers. This interface is used by the management module
3455 * to setup sysfs support as well.
3456 */
3457static int
3458megaraid_cmm_register(adapter_t *adapter)
3459{
3460 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3461 mraid_mmadp_t adp;
3462 scb_t *scb;
3463 mbox_ccb_t *ccb;
3464 int rval;
3465 int i;
3466
3467 // Allocate memory for the base list of scb for management module.
3468 adapter->uscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_USER_CMDS,
3469 GFP_KERNEL);
3470
3471 if (adapter->uscb_list == NULL) {
3472 con_log(CL_ANN, (KERN_WARNING
3473 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3474 __LINE__));
3475 return -1;
3476 }
3477 memset(adapter->uscb_list, 0, sizeof(scb_t) * MBOX_MAX_USER_CMDS);
3478
3479
3480 // Initialize the synchronization parameters for resources for
3481 // commands for management module
3482 INIT_LIST_HEAD(&adapter->uscb_pool);
3483
3484 spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3485
3486
3487
3488 // link all the packets. Note, CCB for commands, coming from the
3489 // commom management module, mailbox physical address are already
3490 // setup by it. We just need placeholder for that in our local command
3491 // control blocks
3492 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3493
3494 scb = adapter->uscb_list + i;
3495 ccb = raid_dev->uccb_list + i;
3496
3497 scb->ccb = (caddr_t)ccb;
3498 ccb->mbox64 = raid_dev->umbox64 + i;
3499 ccb->mbox = &ccb->mbox64->mbox32;
3500 ccb->raw_mbox = (uint8_t *)ccb->mbox;
3501
3502 scb->gp = 0;
3503
3504 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3505 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3506 scb->sno = i + MBOX_MAX_SCSI_CMDS;
3507
3508 scb->scp = NULL;
3509 scb->state = SCB_FREE;
3510 scb->dma_direction = PCI_DMA_NONE;
3511 scb->dma_type = MRAID_DMA_NONE;
3512 scb->dev_channel = -1;
3513 scb->dev_target = -1;
3514
3515 // put scb in the free pool
3516 list_add_tail(&scb->list, &adapter->uscb_pool);
3517 }
3518
3519 adp.unique_id = adapter->unique_id;
3520 adp.drvr_type = DRVRTYPE_MBOX;
3521 adp.drvr_data = (unsigned long)adapter;
3522 adp.pdev = adapter->pdev;
3523 adp.issue_uioc = megaraid_mbox_mm_handler;
c005fb4f 3524 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
1da177e4
LT		 3525 adp.max_kioc = MBOX_MAX_USER_CMDS;
3526
3527 if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3528
3529 con_log(CL_ANN, (KERN_WARNING
3530 "megaraid mbox: did not register with CMM\n"));
3531
3532 kfree(adapter->uscb_list);
3533 }
3534
3535 return rval;
3536}
3537
3538
3539/**
3540 * megaraid_cmm_unregister - un-register with the mangement module
3541 * @param adapter : HBA soft state
3542 *
3543 * Un-register with the management module.
3544 * FIXME: mgmt module must return failure for unregister if it has pending
3545 * commands in LLD
3546 */
3547static int
3548megaraid_cmm_unregister(adapter_t *adapter)
3549{
3550 kfree(adapter->uscb_list);
3551 mraid_mm_unregister_adp(adapter->unique_id);
3552 return 0;
3553}
3554
3555
3556/**
3557 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3558 * @param drvr_data : LLD specific data
3559 * @param kioc : CMM interface packet
3560 * @param action : command action
3561 *
3562 * This routine is invoked whenever the Common Mangement Module (CMM) has a
3563 * command for us. The 'action' parameter specifies if this is a new command
3564 * or otherwise.
3565 */
3566static int
3567megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3568{
3569 adapter_t *adapter;
3570
3571 if (action != IOCTL_ISSUE) {
3572 con_log(CL_ANN, (KERN_WARNING
3573 "megaraid: unsupported management action:%#2x\n",
3574 action));
3575 return (-ENOTSUPP);
3576 }
3577
3578 adapter = (adapter_t *)drvr_data;
3579
3580 // make sure this adapter is not being detached right now.
3581 if (atomic_read(&adapter->being_detached)) {
3582 con_log(CL_ANN, (KERN_WARNING
3583 "megaraid: reject management request, detaching\n"));
3584 return (-ENODEV);
3585 }
3586
3587 switch (kioc->opcode) {
3588
3589 case GET_ADAP_INFO:
3590
3591 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *)
3592 (unsigned long)kioc->buf_vaddr);
3593
3594 kioc->done(kioc);
3595
3596 return kioc->status;
3597
3598 case MBOX_CMD:
3599
3600 return megaraid_mbox_mm_command(adapter, kioc);
3601
3602 default:
3603 kioc->status = (-EINVAL);
3604 kioc->done(kioc);
3605 return (-EINVAL);
3606 }
3607
3608 return 0; // not reached
3609}
3610
3611/**
3612 * megaraid_mbox_mm_command - issues commands routed through CMM
3613 * @param adapter : HBA soft state
3614 * @param kioc : management command packet
3615 *
3616 * Issues commands, which are routed through the management module.
3617 */
3618static int
3619megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3620{
3621 struct list_head *head = &adapter->uscb_pool;
3622 mbox64_t *mbox64;
3623 uint8_t *raw_mbox;
3624 scb_t *scb;
3625 mbox_ccb_t *ccb;
3626 unsigned long flags;
3627
3628 // detach one scb from free pool
3629 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3630
3631 if (list_empty(head)) { // should never happen because of CMM
3632
3633 con_log(CL_ANN, (KERN_WARNING
3634 "megaraid mbox: bug in cmm handler, lost resources\n"));
3635
3636 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3637
3638 return (-EINVAL);
3639 }
3640
3641 scb = list_entry(head->next, scb_t, list);
3642 list_del_init(&scb->list);
3643
3644 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3645
3646 scb->state = SCB_ACTIVE;
3647 scb->dma_type = MRAID_DMA_NONE;
3648 scb->dma_direction = PCI_DMA_NONE;
3649
3650 ccb = (mbox_ccb_t *)scb->ccb;
3651 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3652 raw_mbox = (uint8_t *)&mbox64->mbox32;
3653
3654 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3655
3656 scb->gp = (unsigned long)kioc;
3657
3658 /*
3659 * If it is a logdrv random delete operation, we have to wait till
3660 * there are no outstanding cmds at the fw and then issue it directly
3661 */
3662 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3663
3664 if (wait_till_fw_empty(adapter)) {
3665 con_log(CL_ANN, (KERN_NOTICE
3666 "megaraid mbox: LD delete, timed out\n"));
3667
3668 kioc->status = -ETIME;
3669
3670 scb->status = -1;
3671
3672 megaraid_mbox_mm_done(adapter, scb);
3673
3674 return (-ETIME);
3675 }
3676
3677 INIT_LIST_HEAD(&scb->list);
3678
3679 scb->state = SCB_ISSUED;
3680 if (mbox_post_cmd(adapter, scb) != 0) {
3681
3682 con_log(CL_ANN, (KERN_NOTICE
3683 "megaraid mbox: LD delete, mailbox busy\n"));
3684
3685 kioc->status = -EBUSY;
3686
3687 scb->status = -1;
3688
3689 megaraid_mbox_mm_done(adapter, scb);
3690
3691 return (-EBUSY);
3692 }
3693
3694 return 0;
3695 }
3696
3697 // put the command on the pending list and execute
3698 megaraid_mbox_runpendq(adapter, scb);
3699
3700 return 0;
3701}
3702
3703
3704static int
3705wait_till_fw_empty(adapter_t *adapter)
3706{
3707 unsigned long flags = 0;
3708 int i;
3709
3710
3711 /*
3712 * Set the quiescent flag to stop issuing cmds to FW.
3713 */
f2c8dc40 3714 spin_lock_irqsave(&adapter->lock, flags);
1da177e4 3715 adapter->quiescent++;
f2c8dc40 3716 spin_unlock_irqrestore(&adapter->lock, flags);
1da177e4
LT		 3717
3718 /*
3719 * Wait till there are no more cmds outstanding at FW. Try for at most
3720 * 60 seconds
3721 */
3722 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3723 con_log(CL_DLEVEL1, (KERN_INFO
3724 "megaraid: FW has %d pending commands\n",
3725 adapter->outstanding_cmds));
3726
3727 msleep(1000);
3728 }
3729
3730 return adapter->outstanding_cmds;
3731}
3732
3733
3734/**
3735 * megaraid_mbox_mm_done - callback for CMM commands
3736 * @adapter : HBA soft state
3737 * @scb : completed command
3738 *
3739 * Callback routine for internal commands originated from the management
3740 * module.
3741 */
3742static void
3743megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3744{
3745 uioc_t *kioc;
3746 mbox64_t *mbox64;
3747 uint8_t *raw_mbox;
3748 unsigned long flags;
3749
3750 kioc = (uioc_t *)scb->gp;
1da177e4
LT		 3751 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3752 mbox64->mbox32.status = scb->status;
3753 raw_mbox = (uint8_t *)&mbox64->mbox32;
3754
3755
3756 // put scb in the free pool
3757 scb->state = SCB_FREE;
3758 scb->scp = NULL;
3759
3760 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3761
3762 list_add(&scb->list, &adapter->uscb_pool);
3763
3764 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3765
3766 // if a delete logical drive operation succeeded, restart the
3767 // controller
3768 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3769
3770 adapter->quiescent--;
3771
3772 megaraid_mbox_runpendq(adapter, NULL);
3773 }
3774
3775 kioc->done(kioc);
3776
3777 return;
3778}
3779
3780
3781/**
3782 * gather_hbainfo - HBA characteristics for the applications
3783 * @param adapter : HBA soft state
3784 * @param hinfo : pointer to the caller's host info strucuture
3785 */
3786static int
3787gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3788{
3789 uint8_t dmajor;
3790
3791 dmajor = megaraid_mbox_version[0];
3792
3793 hinfo->pci_vendor_id = adapter->pdev->vendor;
3794 hinfo->pci_device_id = adapter->pdev->device;
3795 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3796 hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3797
3798 hinfo->pci_bus = adapter->pdev->bus->number;
3799 hinfo->pci_dev_fn = adapter->pdev->devfn;
3800 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn);
3801 hinfo->irq = adapter->host->irq;
3802 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport;
3803
3804 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3805 hinfo->host_no = adapter->host->host_no;
3806
3807 return 0;
3808}
3809
3810/*
3811 * END: Interface for the common management module
3812 */
3813
3814
3815
3816/**
3817 * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3818 *
3819 * Allocate packets required to issue FW calls whenever the sysfs attributes
3820 * are read. These attributes would require up-to-date information from the
3821 * FW. Also set up resources for mutual exclusion to share these resources and
3822 * the wait queue.
3823 *
3824 * @param adapter : controller's soft state
3825 *
3826 * @return 0 on success
3827 * @return -ERROR_CODE on failure
3828 */
3829static int
3830megaraid_sysfs_alloc_resources(adapter_t *adapter)
3831{
3832 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3833 int rval = 0;
3834
3835 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3836
3837 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3838
3839 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3840 PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3841
3842 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3843 !raid_dev->sysfs_buffer) {
3844
3845 con_log(CL_ANN, (KERN_WARNING
3846 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3847 __LINE__));
3848
3849 rval = -ENOMEM;
3850
3851 megaraid_sysfs_free_resources(adapter);
3852 }
3853
3854 sema_init(&raid_dev->sysfs_sem, 1);
3855
3856 init_waitqueue_head(&raid_dev->sysfs_wait_q);
3857
3858 return rval;
3859}
3860
3861
3862/**
3863 * megaraid_sysfs_free_resources - free sysfs related resources
3864 *
3865 * Free packets allocated for sysfs FW commands
3866 *
3867 * @param adapter : controller's soft state
3868 */
3869static void
3870megaraid_sysfs_free_resources(adapter_t *adapter)
3871{
3872 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3873
c9475cb0
JJ		 3874 kfree(raid_dev->sysfs_uioc);
3875 kfree(raid_dev->sysfs_mbox64);
1da177e4
LT		 3876
3877 if (raid_dev->sysfs_buffer) {
3878 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3879 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3880 }
3881}
3882
3883
3884/**
3885 * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3886 *
3887 * Callback routine called in the ISR/tasklet context for get ldmap call
3888 *
3889 * @param uioc : completed packet
3890 */
3891static void
3892megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3893{
3894 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3895 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3896
3897 uioc->status = 0;
3898
3899 wake_up(&raid_dev->sysfs_wait_q);
3900}
3901
3902
3903/**
3904 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3905 *
3906 * Timeout routine to recover and return to application, in case the adapter
3907 * has stopped responding. A timeout of 60 seconds for this command seem like
3908 * a good value
3909 *
3910 * @param uioc : timed out packet
3911 */
3912static void
3913megaraid_sysfs_get_ldmap_timeout(unsigned long data)
3914{
3915 uioc_t *uioc = (uioc_t *)data;
3916 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3917 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3918
3919 uioc->status = -ETIME;
3920
3921 wake_up(&raid_dev->sysfs_wait_q);
3922}
3923
3924
3925/**
3926 * megaraid_sysfs_get_ldmap - get update logical drive map
3927 *
3928 * This routine will be called whenever user reads the logical drive
3929 * attributes, go get the current logical drive mapping table from the
3930 * firmware. We use the managment API's to issue commands to the controller.
3931 *
3932 * NOTE: The commands issuance functionality is not generalized and
3933 * implemented in context of "get ld map" command only. If required, the
3934 * command issuance logical can be trivially pulled out and implemented as a
3935 * standalone libary. For now, this should suffice since there is no other
3936 * user of this interface.
3937 *
3938 * @param adapter : controller's soft state
3939 *
3940 * @return 0 on success
3941 * @return -1 on failure
3942 */
3943static int
3944megaraid_sysfs_get_ldmap(adapter_t *adapter)
3945{
3946 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3947 uioc_t *uioc;
3948 mbox64_t *mbox64;
3949 mbox_t *mbox;
3950 char *raw_mbox;
3951 struct timer_list sysfs_timer;
3952 struct timer_list *timerp;
3953 caddr_t ldmap;
3954 int rval = 0;
3955
3956 /*
3957 * Allow only one read at a time to go through the sysfs attributes
3958 */
3959 down(&raid_dev->sysfs_sem);
3960
3961 uioc = raid_dev->sysfs_uioc;
3962 mbox64 = raid_dev->sysfs_mbox64;
3963 ldmap = raid_dev->sysfs_buffer;
3964
3965 memset(uioc, 0, sizeof(uioc_t));
3966 memset(mbox64, 0, sizeof(mbox64_t));
3967 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
3968
3969 mbox = &mbox64->mbox32;
3970 raw_mbox = (char *)mbox;
3971 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64;
3972 uioc->buf_vaddr = (caddr_t)adapter;
3973 uioc->status = -ENODATA;
3974 uioc->done = megaraid_sysfs_get_ldmap_done;
3975
3976 /*
3977 * Prepare the mailbox packet to get the current logical drive mapping
3978 * table
3979 */
3980 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
3981
3982 raw_mbox[0] = FC_DEL_LOGDRV;
3983 raw_mbox[2] = OP_GET_LDID_MAP;
3984
3985 /*
3986 * Setup a timer to recover from a non-responding controller
3987 */
3988 timerp = &sysfs_timer;
3989 init_timer(timerp);
3990
3991 timerp->function = megaraid_sysfs_get_ldmap_timeout;
3992 timerp->data = (unsigned long)uioc;
3993 timerp->expires = jiffies + 60 * HZ;
3994
3995 add_timer(timerp);
3996
3997 /*
3998 * Send the command to the firmware
3999 */
4000 rval = megaraid_mbox_mm_command(adapter, uioc);
4001
4002 if (rval == 0) { // command successfully issued
4003 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4004
4005 /*
4006 * Check if the command timed out
4007 */
4008 if (uioc->status == -ETIME) {
4009 con_log(CL_ANN, (KERN_NOTICE
4010 "megaraid: sysfs get ld map timed out\n"));
4011
4012 rval = -ETIME;
4013 }
4014 else {
4015 rval = mbox->status;
4016 }
4017
4018 if (rval == 0) {
4019 memcpy(raid_dev->curr_ldmap, ldmap,
4020 sizeof(raid_dev->curr_ldmap));
4021 }
4022 else {
4023 con_log(CL_ANN, (KERN_NOTICE
4024 "megaraid: get ld map failed with %x\n", rval));
4025 }
4026 }
4027 else {
4028 con_log(CL_ANN, (KERN_NOTICE
4029 "megaraid: could not issue ldmap command:%x\n", rval));
4030 }
4031
4032
4033 del_timer_sync(timerp);
4034
4035 up(&raid_dev->sysfs_sem);
4036
4037 return rval;
4038}
4039
4040
4041/**
4042 * megaraid_sysfs_show_app_hndl - display application handle for this adapter
4043 *
4044 * Display the handle used by the applications while executing management
4045 * tasks on the adapter. We invoke a management module API to get the adapter
4046 * handle, since we do not interface with applications directly.
4047 *
4048 * @param cdev : class device object representation for the host
4049 * @param buf : buffer to send data to
4050 */
4051static ssize_t
4052megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf)
4053{
4054 struct Scsi_Host *shost = class_to_shost(cdev);
4055 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4056 uint32_t app_hndl;
4057
4058 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4059
4060 return snprintf(buf, 8, "%u\n", app_hndl);
4061}
4062
4063
4064/**
4065 * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4066 *
4067 * Display the logical drive number for the device in question, if it a valid
4068 * logical drive. For physical devices, "-1" is returned
4069 * The logical drive number is displayed in following format
4070 *
4071 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4072 * <int> <int> <int> <int>
4073 *
4074 * @param dev : device object representation for the scsi device
4075 * @param buf : buffer to send data to
4076 */
4077static ssize_t
10523b3b 4078megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 4079{
4080 struct scsi_device *sdev = to_scsi_device(dev);
4081 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4082 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4083 int scsi_id = -1;
4084 int logical_drv = -1;
4085 int ldid_map = -1;
4086 uint32_t app_hndl = 0;
4087 int mapped_sdev_id;
4088 int rval;
4089 int i;
4090
4091 if (raid_dev->random_del_supported &&
4092 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4093
4094 rval = megaraid_sysfs_get_ldmap(adapter);
4095 if (rval == 0) {
4096
4097 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4098
4099 mapped_sdev_id = sdev->id;
4100
4101 if (sdev->id > adapter->init_id) {
4102 mapped_sdev_id -= 1;
4103 }
4104
4105 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4106
4107 scsi_id = sdev->id;
4108
4109 logical_drv = i;
4110
4111 ldid_map = raid_dev->curr_ldmap[i];
4112
4113 app_hndl = mraid_mm_adapter_app_handle(
4114 adapter->unique_id);
4115
4116 break;
4117 }
4118 }
4119 }
4120 else {
4121 con_log(CL_ANN, (KERN_NOTICE
4122 "megaraid: sysfs get ld map failed: %x\n",
4123 rval));
4124 }
4125 }
4126
4127 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4128 ldid_map, app_hndl);
4129}
4130
4131
4132/*
4133 * END: Mailbox Low Level Driver
4134 */
4135module_init(megaraid_init);
4136module_exit(megaraid_exit);
4137
4138/* vim: set ts=8 sw=8 tw=78 ai si: */
kernel source for telekom puls (alcatel/mediatek)