projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
[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
7d12e780 123static irqreturn_t megaraid_isr(int, void *);
1da177e4
LT		 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
f4c8aa11 333/**
334 * megaraid_change_queue_depth - Change the device's queue depth
335 * @sdev: scsi device struct
336 * @qdepth: depth to set
337 *
338 * Return value:
339 * actual depth set
340 **/
341static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth)
342{
343 if (qdepth > MBOX_MAX_SCSI_CMDS)
344 qdepth = MBOX_MAX_SCSI_CMDS;
345 scsi_adjust_queue_depth(sdev, 0, qdepth);
346 return sdev->queue_depth;
347}
1da177e4
LT		 348
349/*
350 * Scsi host template for megaraid unified driver
351 */
352static struct scsi_host_template megaraid_template_g = {
353 .module = THIS_MODULE,
354 .name = "LSI Logic MegaRAID driver",
355 .proc_name = "megaraid",
356 .queuecommand = megaraid_queue_command,
357 .eh_abort_handler = megaraid_abort_handler,
358 .eh_device_reset_handler = megaraid_reset_handler,
359 .eh_bus_reset_handler = megaraid_reset_handler,
360 .eh_host_reset_handler = megaraid_reset_handler,
f4c8aa11 361 .change_queue_depth = megaraid_change_queue_depth,
1da177e4
LT		 362 .use_clustering = ENABLE_CLUSTERING,
363 .sdev_attrs = megaraid_sdev_attrs,
364 .shost_attrs = megaraid_shost_attrs,
365};
366
367
368/**
369 * megaraid_init - module load hook
370 *
371 * We register ourselves as hotplug enabled module and let PCI subsystem
372 * discover our adaters
373 **/
374static int __init
375megaraid_init(void)
376{
377 int rval;
378
379 // Announce the driver version
380 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
381 MEGARAID_EXT_VERSION));
382
383 // check validity of module parameters
384 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
385
386 con_log(CL_ANN, (KERN_WARNING
387 "megaraid mailbox: max commands per lun reset to %d\n",
388 MBOX_MAX_SCSI_CMDS));
389
390 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
391 }
392
393
394 // register as a PCI hot-plug driver module
672b2d38
JS		 395 rval = pci_register_driver(&megaraid_pci_driver_g);
396 if (rval < 0) {
1da177e4
LT		 397 con_log(CL_ANN, (KERN_WARNING
398 "megaraid: could not register hotplug support.\n"));
399 }
400
401 return rval;
402}
403
404
405/**
406 * megaraid_exit - driver unload entry point
407 *
408 * We simply unwrap the megaraid_init routine here
409 */
410static void __exit
411megaraid_exit(void)
412{
413 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
414
415 // unregister as PCI hotplug driver
416 pci_unregister_driver(&megaraid_pci_driver_g);
417
418 return;
419}
420
421
422/**
423 * megaraid_probe_one - PCI hotplug entry point
424 * @param pdev : handle to this controller's PCI configuration space
425 * @param id : pci device id of the class of controllers
426 *
427 * This routine should be called whenever a new adapter is detected by the
428 * PCI hotplug susbsytem.
429 **/
430static int __devinit
431megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
432{
433 adapter_t *adapter;
434
435
436 // detected a new controller
437 con_log(CL_ANN, (KERN_INFO
438 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
439 pdev->vendor, pdev->device, pdev->subsystem_vendor,
440 pdev->subsystem_device));
441
442 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
443 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
444
445 if (pci_enable_device(pdev)) {
446 con_log(CL_ANN, (KERN_WARNING
447 "megaraid: pci_enable_device failed\n"));
448
449 return -ENODEV;
450 }
451
452 // Enable bus-mastering on this controller
453 pci_set_master(pdev);
454
455 // Allocate the per driver initialization structure
456 adapter = kmalloc(sizeof(adapter_t), GFP_KERNEL);
457
458 if (adapter == NULL) {
459 con_log(CL_ANN, (KERN_WARNING
460 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__));
461
462 goto out_probe_one;
463 }
464 memset(adapter, 0, sizeof(adapter_t));
465
466
467 // set up PCI related soft state and other pre-known parameters
468 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn;
469 adapter->irq = pdev->irq;
470 adapter->pdev = pdev;
471
472 atomic_set(&adapter->being_detached, 0);
473
474 // Setup the default DMA mask. This would be changed later on
475 // depending on hardware capabilities
672b2d38 476 if (pci_set_dma_mask(adapter->pdev, DMA_32BIT_MASK) != 0) {
1da177e4
LT		 477
478 con_log(CL_ANN, (KERN_WARNING
479 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
480
481 goto out_free_adapter;
482 }
483
484
485 // Initialize the synchronization lock for kernel and LLD
486 spin_lock_init(&adapter->lock);
1da177e4
LT		 487
488 // Initialize the command queues: the list of free SCBs and the list
489 // of pending SCBs.
490 INIT_LIST_HEAD(&adapter->kscb_pool);
491 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
492
493 INIT_LIST_HEAD(&adapter->pend_list);
494 spin_lock_init(PENDING_LIST_LOCK(adapter));
495
496 INIT_LIST_HEAD(&adapter->completed_list);
497 spin_lock_init(COMPLETED_LIST_LOCK(adapter));
498
499
500 // Start the mailbox based controller
501 if (megaraid_init_mbox(adapter) != 0) {
502 con_log(CL_ANN, (KERN_WARNING
503 "megaraid: maibox adapter did not initialize\n"));
504
505 goto out_free_adapter;
506 }
507
508 // Register with LSI Common Management Module
509 if (megaraid_cmm_register(adapter) != 0) {
510
511 con_log(CL_ANN, (KERN_WARNING
512 "megaraid: could not register with management module\n"));
513
514 goto out_fini_mbox;
515 }
516
517 // setup adapter handle in PCI soft state
518 pci_set_drvdata(pdev, adapter);
519
520 // attach with scsi mid-layer
521 if (megaraid_io_attach(adapter) != 0) {
522
523 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
524
525 goto out_cmm_unreg;
526 }
527
528 return 0;
529
530out_cmm_unreg:
531 pci_set_drvdata(pdev, NULL);
532 megaraid_cmm_unregister(adapter);
533out_fini_mbox:
534 megaraid_fini_mbox(adapter);
535out_free_adapter:
536 kfree(adapter);
537out_probe_one:
538 pci_disable_device(pdev);
539
540 return -ENODEV;
541}
542
543
544/**
545 * megaraid_detach_one - release the framework resources and call LLD release
546 * routine
547 * @param pdev : handle for our PCI cofiguration space
548 *
549 * This routine is called during driver unload. We free all the allocated
550 * resources and call the corresponding LLD so that it can also release all
551 * its resources.
552 *
553 * This routine is also called from the PCI hotplug system
554 **/
555static void
556megaraid_detach_one(struct pci_dev *pdev)
557{
558 adapter_t *adapter;
559 struct Scsi_Host *host;
560
561
562 // Start a rollback on this adapter
563 adapter = pci_get_drvdata(pdev);
564
565 if (!adapter) {
566 con_log(CL_ANN, (KERN_CRIT
567 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
568 pdev->vendor, pdev->device, pdev->subsystem_vendor,
569 pdev->subsystem_device));
570
571 return;
572 }
573 else {
574 con_log(CL_ANN, (KERN_NOTICE
575 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
576 pdev->vendor, pdev->device, pdev->subsystem_vendor,
577 pdev->subsystem_device));
578 }
579
580
581 host = adapter->host;
582
583 // do not allow any more requests from the management module for this
584 // adapter.
585 // FIXME: How do we account for the request which might still be
586 // pending with us?
587 atomic_set(&adapter->being_detached, 1);
588
589 // detach from the IO sub-system
590 megaraid_io_detach(adapter);
591
592 // reset the device state in the PCI structure. We check this
593 // condition when we enter here. If the device state is NULL,
594 // that would mean the device has already been removed
595 pci_set_drvdata(pdev, NULL);
596
597 // Unregister from common management module
598 //
599 // FIXME: this must return success or failure for conditions if there
600 // is a command pending with LLD or not.
601 megaraid_cmm_unregister(adapter);
602
603 // finalize the mailbox based controller and release all resources
604 megaraid_fini_mbox(adapter);
605
606 kfree(adapter);
607
608 scsi_host_put(host);
609
610 pci_disable_device(pdev);
611
612 return;
613}
614
615
616/**
617 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
618 * @param device : generice driver model device
619 *
620 * Shutdown notification, perform flush cache
621 */
622static void
5457b6a6 623megaraid_mbox_shutdown(struct pci_dev *pdev)
1da177e4 624{
5457b6a6 625 adapter_t *adapter = pci_get_drvdata(pdev);
1da177e4
LT		 626 static int counter;
627
628 if (!adapter) {
629 con_log(CL_ANN, (KERN_WARNING
630 "megaraid: null device in shutdown\n"));
631 return;
632 }
633
634 // flush caches now
635 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
636 counter++));
637
638 megaraid_mbox_flush_cache(adapter);
639
640 con_log(CL_ANN, ("done\n"));
641}
642
643
644/**
645 * megaraid_io_attach - attach a device with the IO subsystem
646 * @param adapter : controller's soft state
647 *
648 * Attach this device with the IO subsystem
649 **/
650static int
651megaraid_io_attach(adapter_t *adapter)
652{
653 struct Scsi_Host *host;
654
655 // Initialize SCSI Host structure
656 host = scsi_host_alloc(&megaraid_template_g, 8);
657 if (!host) {
658 con_log(CL_ANN, (KERN_WARNING
659 "megaraid mbox: scsi_register failed\n"));
660
661 return -1;
662 }
663
664 SCSIHOST2ADAP(host) = (caddr_t)adapter;
665 adapter->host = host;
666
1da177e4
LT		 667 host->irq = adapter->irq;
668 host->unique_id = adapter->unique_id;
669 host->can_queue = adapter->max_cmds;
670 host->this_id = adapter->init_id;
671 host->sg_tablesize = adapter->sglen;
672 host->max_sectors = adapter->max_sectors;
673 host->cmd_per_lun = adapter->cmd_per_lun;
674 host->max_channel = adapter->max_channel;
675 host->max_id = adapter->max_target;
676 host->max_lun = adapter->max_lun;
677
678
679 // notify mid-layer about the new controller
680 if (scsi_add_host(host, &adapter->pdev->dev)) {
681
682 con_log(CL_ANN, (KERN_WARNING
683 "megaraid mbox: scsi_add_host failed\n"));
684
685 scsi_host_put(host);
686
687 return -1;
688 }
689
690 scsi_scan_host(host);
691
692 return 0;
693}
694
695
696/**
697 * megaraid_io_detach - detach a device from the IO subsystem
698 * @param adapter : controller's soft state
699 *
700 * Detach this device from the IO subsystem
701 **/
702static void
703megaraid_io_detach(adapter_t *adapter)
704{
705 struct Scsi_Host *host;
706
707 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
708
709 host = adapter->host;
710
711 scsi_remove_host(host);
712
713 return;
714}
715
716
717/*
718 * START: Mailbox Low Level Driver
719 *
720 * This is section specific to the single mailbox based controllers
721 */
722
723/**
724 * megaraid_init_mbox - initialize controller
725 * @param adapter - our soft state
726 *
727 * . Allocate 16-byte aligned mailbox memory for firmware handshake
728 * . Allocate controller's memory resources
729 * . Find out all initialization data
730 * . Allocate memory required for all the commands
731 * . Use internal library of FW routines, build up complete soft state
732 */
cedfb178 733static int __devinit
1da177e4
LT		 734megaraid_init_mbox(adapter_t *adapter)
735{
736 struct pci_dev *pdev;
737 mraid_device_t *raid_dev;
738 int i;
fbf60802 739 uint32_t magic64;
1da177e4
LT		 740
741
742 adapter->ito = MBOX_TIMEOUT;
743 pdev = adapter->pdev;
744
745 /*
746 * Allocate and initialize the init data structure for mailbox
747 * controllers
748 */
749 raid_dev = kmalloc(sizeof(mraid_device_t), GFP_KERNEL);
750 if (raid_dev == NULL) return -1;
751
752 memset(raid_dev, 0, sizeof(mraid_device_t));
753
754 /*
755 * Attach the adapter soft state to raid device soft state
756 */
757 adapter->raid_device = (caddr_t)raid_dev;
758 raid_dev->fast_load = megaraid_fast_load;
759
760
761 // our baseport
762 raid_dev->baseport = pci_resource_start(pdev, 0);
763
764 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
765
766 con_log(CL_ANN, (KERN_WARNING
767 "megaraid: mem region busy\n"));
768
769 goto out_free_raid_dev;
770 }
771
772 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
773
774 if (!raid_dev->baseaddr) {
775
776 con_log(CL_ANN, (KERN_WARNING
777 "megaraid: could not map hba memory\n") );
778
779 goto out_release_regions;
780 }
781
782 //
783 // Setup the rest of the soft state using the library of FW routines
784 //
785
786 // request IRQ and register the interrupt service routine
1d6f359a 787 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
1da177e4
LT		 788 adapter)) {
789
790 con_log(CL_ANN, (KERN_WARNING
791 "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
792
793 goto out_iounmap;
794 }
795
796
797 // initialize the mutual exclusion lock for the mailbox
798 spin_lock_init(&raid_dev->mailbox_lock);
799
800 // allocate memory required for commands
801 if (megaraid_alloc_cmd_packets(adapter) != 0) {
802 goto out_free_irq;
803 }
804
805 // Product info
806 if (megaraid_mbox_product_info(adapter) != 0) {
807 goto out_alloc_cmds;
808 }
809
810 // Do we support extended CDBs
811 adapter->max_cdb_sz = 10;
812 if (megaraid_mbox_extended_cdb(adapter) == 0) {
813 adapter->max_cdb_sz = 16;
814 }
815
816 /*
817 * Do we support cluster environment, if we do, what is the initiator
818 * id.
819 * NOTE: In a non-cluster aware firmware environment, the LLD should
820 * return 7 as initiator id.
821 */
822 adapter->ha = 0;
823 adapter->init_id = -1;
824 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
825 adapter->ha = 1;
826 }
827
828 /*
829 * Prepare the device ids array to have the mapping between the kernel
830 * device address and megaraid device address.
831 * We export the physical devices on their actual addresses. The
832 * logical drives are exported on a virtual SCSI channel
833 */
834 megaraid_mbox_setup_device_map(adapter);
835
836 // If the firmware supports random deletion, update the device id map
837 if (megaraid_mbox_support_random_del(adapter)) {
838
839 // Change the logical drives numbers in device_ids array one
840 // slot in device_ids is reserved for target id, that's why
841 // "<=" below
842 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
843 adapter->device_ids[adapter->max_channel][i] += 0x80;
844 }
845 adapter->device_ids[adapter->max_channel][adapter->init_id] =
846 0xFF;
847
848 raid_dev->random_del_supported = 1;
849 }
850
851 /*
852 * find out the maximum number of scatter-gather elements supported by
853 * this firmware
854 */
855 adapter->sglen = megaraid_mbox_get_max_sg(adapter);
856
857 // enumerate RAID and SCSI channels so that all devices on SCSI
858 // channels can later be exported, including disk devices
859 megaraid_mbox_enum_raid_scsi(adapter);
860
861 /*
862 * Other parameters required by upper layer
863 *
864 * maximum number of sectors per IO command
865 */
866 adapter->max_sectors = megaraid_max_sectors;
867
868 /*
869 * number of queued commands per LUN.
870 */
871 adapter->cmd_per_lun = megaraid_cmd_per_lun;
872
873 /*
874 * Allocate resources required to issue FW calls, when sysfs is
875 * accessed
876 */
877 if (megaraid_sysfs_alloc_resources(adapter) != 0) {
878 goto out_alloc_cmds;
879 }
880
881 // Set the DMA mask to 64-bit. All supported controllers as capable of
882 // DMA in this range
fbf60802
JS		 883 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
884
885 if (((magic64 == HBA_SIGNATURE_64_BIT) &&
886 ((adapter->pdev->subsystem_device !=
887 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) ||
888 (adapter->pdev->subsystem_device !=
889 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
890 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
891 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
892 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
893 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
894 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
895 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
896 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
897 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
898 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
899 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
900 if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK)) {
901 con_log(CL_ANN, (KERN_WARNING
902 "megaraid: DMA mask for 64-bit failed\n"));
903
904 if (pci_set_dma_mask (adapter->pdev, DMA_32BIT_MASK)) {
905 con_log(CL_ANN, (KERN_WARNING
906 "megaraid: 32-bit DMA mask failed\n"));
907 goto out_free_sysfs_res;
908 }
909 }
1da177e4
LT		 910 }
911
912 // setup tasklet for DPC
913 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
914 (unsigned long)adapter);
915
916 con_log(CL_DLEVEL1, (KERN_INFO
917 "megaraid mbox hba successfully initialized\n"));
918
919 return 0;
920
921out_free_sysfs_res:
922 megaraid_sysfs_free_resources(adapter);
923out_alloc_cmds:
924 megaraid_free_cmd_packets(adapter);
925out_free_irq:
926 free_irq(adapter->irq, adapter);
927out_iounmap:
928 iounmap(raid_dev->baseaddr);
929out_release_regions:
930 pci_release_regions(pdev);
931out_free_raid_dev:
932 kfree(raid_dev);
933
934 return -1;
935}
936
937
938/**
939 * megaraid_fini_mbox - undo controller initialization
940 * @param adapter : our soft state
941 */
942static void
943megaraid_fini_mbox(adapter_t *adapter)
944{
945 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
946
947 // flush all caches
948 megaraid_mbox_flush_cache(adapter);
949
950 tasklet_kill(&adapter->dpc_h);
951
952 megaraid_sysfs_free_resources(adapter);
953
954 megaraid_free_cmd_packets(adapter);
955
956 free_irq(adapter->irq, adapter);
957
958 iounmap(raid_dev->baseaddr);
959
960 pci_release_regions(adapter->pdev);
961
962 kfree(raid_dev);
963
964 return;
965}
966
967
968/**
969 * megaraid_alloc_cmd_packets - allocate shared mailbox
970 * @param adapter : soft state of the raid controller
971 *
972 * Allocate and align the shared mailbox. This maibox is used to issue
973 * all the commands. For IO based controllers, the mailbox is also regsitered
974 * with the FW. Allocate memory for all commands as well.
975 * This is our big allocator
976 */
977static int
978megaraid_alloc_cmd_packets(adapter_t *adapter)
979{
980 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
981 struct pci_dev *pdev;
982 unsigned long align;
983 scb_t *scb;
984 mbox_ccb_t *ccb;
985 struct mraid_pci_blk *epthru_pci_blk;
986 struct mraid_pci_blk *sg_pci_blk;
987 struct mraid_pci_blk *mbox_pci_blk;
988 int i;
989
990 pdev = adapter->pdev;
991
992 /*
993 * Setup the mailbox
994 * Allocate the common 16-byte aligned memory for the handshake
995 * mailbox.
996 */
997 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
998 sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
999
1000 if (!raid_dev->una_mbox64) {
1001 con_log(CL_ANN, (KERN_WARNING
1002 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1003 __LINE__));
1004 return -1;
1005 }
1006 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
1007
1008 /*
1009 * Align the mailbox at 16-byte boundary
1010 */
1011 raid_dev->mbox = &raid_dev->una_mbox64->mbox32;
1012
1013 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
1014 (~0UL ^ 0xFUL));
1015
1016 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
1017
1018 align = ((void *)raid_dev->mbox -
1019 ((void *)&raid_dev->una_mbox64->mbox32));
1020
1021 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1022 align;
1023
1024 // Allocate memory for commands issued internally
1025 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
1026 &adapter->ibuf_dma_h);
1027 if (!adapter->ibuf) {
1028
1029 con_log(CL_ANN, (KERN_WARNING
1030 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1031 __LINE__));
1032
1033 goto out_free_common_mbox;
1034 }
1035 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
1036
1037 // Allocate memory for our SCSI Command Blocks and their associated
1038 // memory
1039
1040 /*
1041 * Allocate memory for the base list of scb. Later allocate memory for
1042 * CCBs and embedded components of each CCB and point the pointers in
1043 * scb to the allocated components
1044 * NOTE: The code to allocate SCB will be duplicated in all the LLD
1045 * since the calling routine does not yet know the number of available
1046 * commands.
1047 */
1048 adapter->kscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_SCSI_CMDS,
1049 GFP_KERNEL);
1050
1051 if (adapter->kscb_list == NULL) {
1052 con_log(CL_ANN, (KERN_WARNING
1053 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1054 __LINE__));
1055 goto out_free_ibuf;
1056 }
1057 memset(adapter->kscb_list, 0, sizeof(scb_t) * MBOX_MAX_SCSI_CMDS);
1058
1059 // memory allocation for our command packets
1060 if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1061 con_log(CL_ANN, (KERN_WARNING
1062 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1063 __LINE__));
1064 goto out_free_scb_list;
1065 }
1066
1067 // Adjust the scb pointers and link in the free pool
1068 epthru_pci_blk = raid_dev->epthru_pool;
1069 sg_pci_blk = raid_dev->sg_pool;
1070 mbox_pci_blk = raid_dev->mbox_pool;
1071
1072 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1073 scb = adapter->kscb_list + i;
1074 ccb = raid_dev->ccb_list + i;
1075
1076 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1077 ccb->raw_mbox = (uint8_t *)ccb->mbox;
1078 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1079 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1080
1081 // make sure the mailbox is aligned properly
1082 if (ccb->mbox_dma_h & 0x0F) {
1083 con_log(CL_ANN, (KERN_CRIT
1084 "megaraid mbox: not aligned on 16-bytes\n"));
1085
1086 goto out_teardown_dma_pools;
1087 }
1088
1089 ccb->epthru = (mraid_epassthru_t *)
1090 epthru_pci_blk[i].vaddr;
1091 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr;
1092 ccb->pthru = (mraid_passthru_t *)ccb->epthru;
1093 ccb->pthru_dma_h = ccb->epthru_dma_h;
1094
1095
1096 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1097 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr;
1098 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64;
1099
1100 scb->ccb = (caddr_t)ccb;
1101 scb->gp = 0;
1102
1103 scb->sno = i; // command index
1104
1105 scb->scp = NULL;
1106 scb->state = SCB_FREE;
1107 scb->dma_direction = PCI_DMA_NONE;
1108 scb->dma_type = MRAID_DMA_NONE;
1109 scb->dev_channel = -1;
1110 scb->dev_target = -1;
1111
1112 // put scb in the free pool
1113 list_add_tail(&scb->list, &adapter->kscb_pool);
1114 }
1115
1116 return 0;
1117
1118out_teardown_dma_pools:
1119 megaraid_mbox_teardown_dma_pools(adapter);
1120out_free_scb_list:
1121 kfree(adapter->kscb_list);
1122out_free_ibuf:
1123 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1124 adapter->ibuf_dma_h);
1125out_free_common_mbox:
1126 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1127 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1128
1129 return -1;
1130}
1131
1132
1133/**
1134 * megaraid_free_cmd_packets - free memory
1135 * @param adapter : soft state of the raid controller
1136 *
1137 * Release memory resources allocated for commands
1138 */
1139static void
1140megaraid_free_cmd_packets(adapter_t *adapter)
1141{
1142 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1143
1144 megaraid_mbox_teardown_dma_pools(adapter);
1145
1146 kfree(adapter->kscb_list);
1147
1148 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1149 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1150
1151 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1152 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1153 return;
1154}
1155
1156
1157/**
1158 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1159 * @param adapter : HBA soft state
1160 *
1161 * setup the dma pools for mailbox, passthru and extended passthru structures,
1162 * and scatter-gather lists
1163 */
1164static int
1165megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1166{
1167 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1168 struct mraid_pci_blk *epthru_pci_blk;
1169 struct mraid_pci_blk *sg_pci_blk;
1170 struct mraid_pci_blk *mbox_pci_blk;
1171 int i;
1172
1173
1174
1175 // Allocate memory for 16-bytes aligned mailboxes
1176 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1177 adapter->pdev,
1178 sizeof(mbox64_t) + 16,
1179 16, 0);
1180
1181 if (raid_dev->mbox_pool_handle == NULL) {
1182 goto fail_setup_dma_pool;
1183 }
1184
1185 mbox_pci_blk = raid_dev->mbox_pool;
1186 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1187 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1188 raid_dev->mbox_pool_handle,
1189 GFP_KERNEL,
1190 &mbox_pci_blk[i].dma_addr);
1191 if (!mbox_pci_blk[i].vaddr) {
1192 goto fail_setup_dma_pool;
1193 }
1194 }
1195
1196 /*
1197 * Allocate memory for each embedded passthru strucuture pointer
1198 * Request for a 128 bytes aligned structure for each passthru command
1199 * structure
1200 * Since passthru and extended passthru commands are exclusive, they
1201 * share common memory pool. Passthru structures piggyback on memory
1202 * allocted to extended passthru since passthru is smaller of the two
1203 */
1204 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1205 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1206
1207 if (raid_dev->epthru_pool_handle == NULL) {
1208 goto fail_setup_dma_pool;
1209 }
1210
1211 epthru_pci_blk = raid_dev->epthru_pool;
1212 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1213 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1214 raid_dev->epthru_pool_handle,
1215 GFP_KERNEL,
1216 &epthru_pci_blk[i].dma_addr);
1217 if (!epthru_pci_blk[i].vaddr) {
1218 goto fail_setup_dma_pool;
1219 }
1220 }
1221
1222
1223 // Allocate memory for each scatter-gather list. Request for 512 bytes
1224 // alignment for each sg list
1225 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1226 adapter->pdev,
1227 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1228 512, 0);
1229
1230 if (raid_dev->sg_pool_handle == NULL) {
1231 goto fail_setup_dma_pool;
1232 }
1233
1234 sg_pci_blk = raid_dev->sg_pool;
1235 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1236 sg_pci_blk[i].vaddr = pci_pool_alloc(
1237 raid_dev->sg_pool_handle,
1238 GFP_KERNEL,
1239 &sg_pci_blk[i].dma_addr);
1240 if (!sg_pci_blk[i].vaddr) {
1241 goto fail_setup_dma_pool;
1242 }
1243 }
1244
1245 return 0;
1246
1247fail_setup_dma_pool:
1248 megaraid_mbox_teardown_dma_pools(adapter);
1249 return -1;
1250}
1251
1252
1253/**
1254 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1255 * @param adapter : HBA soft state
1256 *
1257 * teardown the dma pool for mailbox, passthru and extended passthru
1258 * structures, and scatter-gather lists
1259 */
1260static void
1261megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1262{
1263 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1264 struct mraid_pci_blk *epthru_pci_blk;
1265 struct mraid_pci_blk *sg_pci_blk;
1266 struct mraid_pci_blk *mbox_pci_blk;
1267 int i;
1268
1269
1270 sg_pci_blk = raid_dev->sg_pool;
1271 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1272 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1273 sg_pci_blk[i].dma_addr);
1274 }
1275 if (raid_dev->sg_pool_handle)
1276 pci_pool_destroy(raid_dev->sg_pool_handle);
1277
1278
1279 epthru_pci_blk = raid_dev->epthru_pool;
1280 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1281 pci_pool_free(raid_dev->epthru_pool_handle,
1282 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1283 }
1284 if (raid_dev->epthru_pool_handle)
1285 pci_pool_destroy(raid_dev->epthru_pool_handle);
1286
1287
1288 mbox_pci_blk = raid_dev->mbox_pool;
1289 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1290 pci_pool_free(raid_dev->mbox_pool_handle,
1291 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1292 }
1293 if (raid_dev->mbox_pool_handle)
1294 pci_pool_destroy(raid_dev->mbox_pool_handle);
1295
1296 return;
1297}
1298
1299
1300/**
1301 * megaraid_alloc_scb - detach and return a scb from the free list
1302 * @adapter : controller's soft state
1303 *
1304 * return the scb from the head of the free list. NULL if there are none
1305 * available
1306 **/
858119e1 1307static scb_t *
1da177e4
LT		 1308megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1309{
1310 struct list_head *head = &adapter->kscb_pool;
1311 scb_t *scb = NULL;
1312 unsigned long flags;
1313
1314 // detach scb from free pool
1315 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1316
1317 if (list_empty(head)) {
1318 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1319 return NULL;
1320 }
1321
1322 scb = list_entry(head->next, scb_t, list);
1323 list_del_init(&scb->list);
1324
1325 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1326
1327 scb->state = SCB_ACTIVE;
1328 scb->scp = scp;
1329 scb->dma_type = MRAID_DMA_NONE;
1330
1331 return scb;
1332}
1333
1334
1335/**
1336 * megaraid_dealloc_scb - return the scb to the free pool
1337 * @adapter : controller's soft state
1338 * @scb : scb to be freed
1339 *
1340 * return the scb back to the free list of scbs. The caller must 'flush' the
1341 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1342 * NOTE NOTE: Make sure the scb is not on any list before calling this
1343 * routine.
1344 **/
1345static inline void
1346megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1347{
1348 unsigned long flags;
1349
1350 // put scb in the free pool
1351 scb->state = SCB_FREE;
1352 scb->scp = NULL;
1353 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1354
1355 list_add(&scb->list, &adapter->kscb_pool);
1356
1357 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1358
1359 return;
1360}
1361
1362
1363/**
1364 * megaraid_mbox_mksgl - make the scatter-gather list
1365 * @adapter - controller's soft state
1366 * @scb - scsi control block
1367 *
1368 * prepare the scatter-gather list
1369 */
858119e1 1370static int
1da177e4
LT		 1371megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1372{
1373 struct scatterlist *sgl;
1374 mbox_ccb_t *ccb;
1375 struct page *page;
1376 unsigned long offset;
1377 struct scsi_cmnd *scp;
1378 int sgcnt;
1379 int i;
1380
1381
1382 scp = scb->scp;
1383 ccb = (mbox_ccb_t *)scb->ccb;
1384
1385 // no mapping required if no data to be transferred
1386 if (!scp->request_buffer || !scp->request_bufflen)
1387 return 0;
1388
1389 if (!scp->use_sg) { /* scatter-gather list not used */
1390
1391 page = virt_to_page(scp->request_buffer);
1392
1393 offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK);
1394
1395 ccb->buf_dma_h = pci_map_page(adapter->pdev, page, offset,
1396 scp->request_bufflen,
1397 scb->dma_direction);
1398 scb->dma_type = MRAID_DMA_WBUF;
1399
1400 /*
1401 * We need to handle special 64-bit commands that need a
1402 * minimum of 1 SG
1403 */
1404 sgcnt = 1;
1405 ccb->sgl64[0].address = ccb->buf_dma_h;
1406 ccb->sgl64[0].length = scp->request_bufflen;
1407
1408 return sgcnt;
1409 }
1410
1411 sgl = (struct scatterlist *)scp->request_buffer;
1412
1413 // The number of sg elements returned must not exceed our limit
1414 sgcnt = pci_map_sg(adapter->pdev, sgl, scp->use_sg,
1415 scb->dma_direction);
1416
1417 if (sgcnt > adapter->sglen) {
1418 con_log(CL_ANN, (KERN_CRIT
1419 "megaraid critical: too many sg elements:%d\n",
1420 sgcnt));
1421 BUG();
1422 }
1423
1424 scb->dma_type = MRAID_DMA_WSG;
1425
1426 for (i = 0; i < sgcnt; i++, sgl++) {
1427 ccb->sgl64[i].address = sg_dma_address(sgl);
1428 ccb->sgl64[i].length = sg_dma_len(sgl);
1429 }
1430
1431 // Return count of SG nodes
1432 return sgcnt;
1433}
1434
1435
1436/**
1437 * mbox_post_cmd - issue a mailbox command
1438 * @adapter - controller's soft state
1439 * @scb - command to be issued
1440 *
1441 * post the command to the controller if mailbox is availble.
1442 */
858119e1 1443static int
1da177e4
LT		 1444mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1445{
1446 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1447 mbox64_t *mbox64;
1448 mbox_t *mbox;
1449 mbox_ccb_t *ccb;
1450 unsigned long flags;
1451 unsigned int i = 0;
1452
1453
1454 ccb = (mbox_ccb_t *)scb->ccb;
1455 mbox = raid_dev->mbox;
1456 mbox64 = raid_dev->mbox64;
1457
1458 /*
1459 * Check for busy mailbox. If it is, return failure - the caller
1460 * should retry later.
1461 */
1462 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1463
1464 if (unlikely(mbox->busy)) {
1465 do {
1466 udelay(1);
1467 i++;
1468 rmb();
1469 } while(mbox->busy && (i < max_mbox_busy_wait));
1470
1471 if (mbox->busy) {
1472
1473 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1474
1475 return -1;
1476 }
1477 }
1478
1479
1480 // Copy this command's mailbox data into "adapter's" mailbox
1481 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1482 mbox->cmdid = scb->sno;
1483
1484 adapter->outstanding_cmds++;
1485
1486 if (scb->dma_direction == PCI_DMA_TODEVICE) {
1487 if (!scb->scp->use_sg) { // sg list not used
1488 pci_dma_sync_single_for_device(adapter->pdev,
1489 ccb->buf_dma_h,
1490 scb->scp->request_bufflen,
1491 PCI_DMA_TODEVICE);
1492 }
1493 else {
1494 pci_dma_sync_sg_for_device(adapter->pdev,
1495 scb->scp->request_buffer,
1496 scb->scp->use_sg, PCI_DMA_TODEVICE);
1497 }
1498 }
1499
1500 mbox->busy = 1; // Set busy
1501 mbox->poll = 0;
1502 mbox->ack = 0;
1503 wmb();
1504
1505 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1506
1507 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1508
1509 return 0;
1510}
1511
1512
1513/**
1514 * megaraid_queue_command - generic queue entry point for all LLDs
1515 * @scp : pointer to the scsi command to be executed
1516 * @done : callback routine to be called after the cmd has be completed
1517 *
1518 * Queue entry point for mailbox based controllers.
1519 */
1520static int
1521megaraid_queue_command(struct scsi_cmnd *scp, void (* done)(struct scsi_cmnd *))
1522{
1523 adapter_t *adapter;
1524 scb_t *scb;
1525 int if_busy;
1526
1527 adapter = SCP2ADAPTER(scp);
1528 scp->scsi_done = done;
1529 scp->result = 0;
1530
1da177e4
LT		 1531 /*
1532 * Allocate and build a SCB request
1533 * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1534 * not allocate scb. We will return non-zero status in that case.
1535 * NOTE: scb can be null even though certain commands completed
1536 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1537 * return 0 in that case, and we would do the callback right away.
1538 */
1539 if_busy = 0;
f2c8dc40 1540 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1da177e4
LT		 1541 if (!scb) { // command already completed
1542 done(scp);
1543 return 0;
1544 }
1545
f2c8dc40 1546 megaraid_mbox_runpendq(adapter, scb);
1da177e4
LT		 1547 return if_busy;
1548}
1549
1da177e4
LT		 1550/**
1551 * megaraid_mbox_build_cmd - transform the mid-layer scsi command to megaraid
1552 * firmware lingua
1553 * @adapter - controller's soft state
1554 * @scp - mid-layer scsi command pointer
1555 * @busy - set if request could not be completed because of lack of
1556 * resources
1557 *
1558 * convert the command issued by mid-layer to format understood by megaraid
1559 * firmware. We also complete certain command without sending them to firmware
1560 */
1561static scb_t *
1562megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1563{
1564 mraid_device_t *rdev = ADAP2RAIDDEV(adapter);
1565 int channel;
1566 int target;
1567 int islogical;
1568 mbox_ccb_t *ccb;
1569 mraid_passthru_t *pthru;
1570 mbox64_t *mbox64;
1571 mbox_t *mbox;
1572 scb_t *scb;
1573 char skip[] = "skipping";
1574 char scan[] = "scanning";
1575 char *ss;
1576
1577
1578 /*
1579 * Get the appropriate device map for the device this command is
1580 * intended for
1581 */
1582 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1583
1584 /*
1585 * Logical drive commands
1586 */
1587 if (islogical) {
1588 switch (scp->cmnd[0]) {
1589 case TEST_UNIT_READY:
1590 /*
1591 * Do we support clustering and is the support enabled
1592 * If no, return success always
1593 */
1594 if (!adapter->ha) {
1595 scp->result = (DID_OK << 16);
1596 return NULL;
1597 }
1598
1599 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1600 scp->result = (DID_ERROR << 16);
1601 *busy = 1;
1602 return NULL;
1603 }
1604
1605 scb->dma_direction = scp->sc_data_direction;
1606 scb->dev_channel = 0xFF;
1607 scb->dev_target = target;
1608 ccb = (mbox_ccb_t *)scb->ccb;
1609
1610 /*
1611 * The command id will be provided by the command
1612 * issuance routine
1613 */
1614 ccb->raw_mbox[0] = CLUSTER_CMD;
1615 ccb->raw_mbox[2] = RESERVATION_STATUS;
1616 ccb->raw_mbox[3] = target;
1617
1618 return scb;
1619
1620 case MODE_SENSE:
1621 if (scp->use_sg) {
1622 struct scatterlist *sgl;
1623 caddr_t vaddr;
1624
1625 sgl = (struct scatterlist *)scp->request_buffer;
1626 if (sgl->page) {
1627 vaddr = (caddr_t)
1628 (page_address((&sgl[0])->page)
1629 + (&sgl[0])->offset);
1630
1631 memset(vaddr, 0, scp->cmnd[4]);
1632 }
1633 else {
1634 con_log(CL_ANN, (KERN_WARNING
1635 "megaraid mailbox: invalid sg:%d\n",
1636 __LINE__));
1637 }
1638 }
1639 else {
1640 memset(scp->request_buffer, 0, scp->cmnd[4]);
1641 }
1642 scp->result = (DID_OK << 16);
1643 return NULL;
1644
1645 case INQUIRY:
1646 /*
1647 * Display the channel scan for logical drives
1648 * Do not display scan for a channel if already done.
1649 */
1650 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1651
1652 con_log(CL_ANN, (KERN_INFO
1653 "scsi[%d]: scanning scsi channel %d",
1654 adapter->host->host_no,
1655 SCP2CHANNEL(scp)));
1656
1657 con_log(CL_ANN, (
1658 " [virtual] for logical drives\n"));
1659
1660 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1661 }
1662
aa677bc7
JS		 1663 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1664 scp->sense_buffer[0] = 0x70;
1665 scp->sense_buffer[2] = ILLEGAL_REQUEST;
1666 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB;
1667 scp->result = CHECK_CONDITION << 1;
1668 return NULL;
1669 }
1670
1da177e4
LT		 1671 /* Fall through */
1672
1673 case READ_CAPACITY:
1674 /*
1675 * Do not allow LUN > 0 for logical drives and
1676 * requests for more than 40 logical drives
1677 */
1678 if (SCP2LUN(scp)) {
1679 scp->result = (DID_BAD_TARGET << 16);
1680 return NULL;
1681 }
1682 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1683 scp->result = (DID_BAD_TARGET << 16);
1684 return NULL;
1685 }
1686
1687
1688 /* Allocate a SCB and initialize passthru */
1689 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1690 scp->result = (DID_ERROR << 16);
1691 *busy = 1;
1692 return NULL;
1693 }
1694
1695 ccb = (mbox_ccb_t *)scb->ccb;
1696 scb->dev_channel = 0xFF;
1697 scb->dev_target = target;
1698 pthru = ccb->pthru;
1699 mbox = ccb->mbox;
1700 mbox64 = ccb->mbox64;
1701
1702 pthru->timeout = 0;
1703 pthru->ars = 1;
1704 pthru->reqsenselen = 14;
1705 pthru->islogical = 1;
1706 pthru->logdrv = target;
1707 pthru->cdblen = scp->cmd_len;
1708 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1709
1710 mbox->cmd = MBOXCMD_PASSTHRU64;
1711 scb->dma_direction = scp->sc_data_direction;
1712
1713 pthru->dataxferlen = scp->request_bufflen;
1714 pthru->dataxferaddr = ccb->sgl_dma_h;
1715 pthru->numsge = megaraid_mbox_mksgl(adapter,
1716 scb);
1717
1718 mbox->xferaddr = 0xFFFFFFFF;
1719 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h;
1720 mbox64->xferaddr_hi = 0;
1721
1722 return scb;
1723
1724 case READ_6:
1725 case WRITE_6:
1726 case READ_10:
1727 case WRITE_10:
1728 case READ_12:
1729 case WRITE_12:
1730
1731 /*
1732 * Allocate a SCB and initialize mailbox
1733 */
1734 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1735 scp->result = (DID_ERROR << 16);
1736 *busy = 1;
1737 return NULL;
1738 }
1739 ccb = (mbox_ccb_t *)scb->ccb;
1740 scb->dev_channel = 0xFF;
1741 scb->dev_target = target;
1742 mbox = ccb->mbox;
1743 mbox64 = ccb->mbox64;
1744 mbox->logdrv = target;
1745
1746 /*
1747 * A little HACK: 2nd bit is zero for all scsi read
1748 * commands and is set for all scsi write commands
1749 */
1750 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64:
1751 MBOXCMD_LREAD64 ;
1752
1753 /*
1754 * 6-byte READ(0x08) or WRITE(0x0A) cdb
1755 */
1756 if (scp->cmd_len == 6) {
1757 mbox->numsectors = (uint32_t)scp->cmnd[4];
1758 mbox->lba =
1759 ((uint32_t)scp->cmnd[1] << 16) |
1760 ((uint32_t)scp->cmnd[2] << 8) |
1761 (uint32_t)scp->cmnd[3];
1762
1763 mbox->lba &= 0x1FFFFF;
1764 }
1765
1766 /*
1767 * 10-byte READ(0x28) or WRITE(0x2A) cdb
1768 */
1769 else if (scp->cmd_len == 10) {
1770 mbox->numsectors =
1771 (uint32_t)scp->cmnd[8] |
1772 ((uint32_t)scp->cmnd[7] << 8);
1773 mbox->lba =
1774 ((uint32_t)scp->cmnd[2] << 24) |
1775 ((uint32_t)scp->cmnd[3] << 16) |
1776 ((uint32_t)scp->cmnd[4] << 8) |
1777 (uint32_t)scp->cmnd[5];
1778 }
1779
1780 /*
1781 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1782 */
1783 else if (scp->cmd_len == 12) {
1784 mbox->lba =
1785 ((uint32_t)scp->cmnd[2] << 24) |
1786 ((uint32_t)scp->cmnd[3] << 16) |
1787 ((uint32_t)scp->cmnd[4] << 8) |
1788 (uint32_t)scp->cmnd[5];
1789
1790 mbox->numsectors =
1791 ((uint32_t)scp->cmnd[6] << 24) |
1792 ((uint32_t)scp->cmnd[7] << 16) |
1793 ((uint32_t)scp->cmnd[8] << 8) |
1794 (uint32_t)scp->cmnd[9];
1795 }
1796 else {
1797 con_log(CL_ANN, (KERN_WARNING
1798 "megaraid: unsupported CDB length\n"));
1799
1800 megaraid_dealloc_scb(adapter, scb);
1801
1802 scp->result = (DID_ERROR << 16);
1803 return NULL;
1804 }
1805
1806 scb->dma_direction = scp->sc_data_direction;
1807
1808 // Calculate Scatter-Gather info
1809 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h;
1810 mbox->numsge = megaraid_mbox_mksgl(adapter,
1811 scb);
1812 mbox->xferaddr = 0xFFFFFFFF;
1813 mbox64->xferaddr_hi = 0;
1814
1815 return scb;
1816
1817 case RESERVE:
1818 case RELEASE:
1819 /*
1820 * Do we support clustering and is the support enabled
1821 */
1822 if (!adapter->ha) {
1823 scp->result = (DID_BAD_TARGET << 16);
1824 return NULL;
1825 }
1826
1827 /*
1828 * Allocate a SCB and initialize mailbox
1829 */
1830 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1831 scp->result = (DID_ERROR << 16);
1832 *busy = 1;
1833 return NULL;
1834 }
1835
1836 ccb = (mbox_ccb_t *)scb->ccb;
1837 scb->dev_channel = 0xFF;
1838 scb->dev_target = target;
1839 ccb->raw_mbox[0] = CLUSTER_CMD;
1840 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ?
1841 RESERVE_LD : RELEASE_LD;
1842
1843 ccb->raw_mbox[3] = target;
1844 scb->dma_direction = scp->sc_data_direction;
1845
1846 return scb;
1847
1848 default:
1849 scp->result = (DID_BAD_TARGET << 16);
1850 return NULL;
1851 }
1852 }
1853 else { // Passthru device commands
1854
1855 // Do not allow access to target id > 15 or LUN > 7
1856 if (target > 15 || SCP2LUN(scp) > 7) {
1857 scp->result = (DID_BAD_TARGET << 16);
1858 return NULL;
1859 }
1860
1861 // if fast load option was set and scan for last device is
1862 // over, reset the fast_load flag so that during a possible
1863 // next scan, devices can be made available
1864 if (rdev->fast_load && (target == 15) &&
1865 (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1866
1867 con_log(CL_ANN, (KERN_INFO
1868 "megaraid[%d]: physical device scan re-enabled\n",
1869 adapter->host->host_no));
1870 rdev->fast_load = 0;
1871 }
1872
1873 /*
1874 * Display the channel scan for physical devices
1875 */
1876 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1877
1878 ss = rdev->fast_load ? skip : scan;
1879
1880 con_log(CL_ANN, (KERN_INFO
1881 "scsi[%d]: %s scsi channel %d [Phy %d]",
1882 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1883 channel));
1884
1885 con_log(CL_ANN, (
1886 " for non-raid devices\n"));
1887
1888 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1889 }
1890
1891 // disable channel sweep if fast load option given
1892 if (rdev->fast_load) {
1893 scp->result = (DID_BAD_TARGET << 16);
1894 return NULL;
1895 }
1896
1897 // Allocate a SCB and initialize passthru
1898 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1899 scp->result = (DID_ERROR << 16);
1900 *busy = 1;
1901 return NULL;
1902 }
1903
1904 ccb = (mbox_ccb_t *)scb->ccb;
1905 scb->dev_channel = channel;
1906 scb->dev_target = target;
1907 scb->dma_direction = scp->sc_data_direction;
1908 mbox = ccb->mbox;
1909 mbox64 = ccb->mbox64;
1910
1911 // Does this firmware support extended CDBs
1912 if (adapter->max_cdb_sz == 16) {
1913 mbox->cmd = MBOXCMD_EXTPTHRU;
1914
1915 megaraid_mbox_prepare_epthru(adapter, scb, scp);
1916
1917 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h;
1918 mbox64->xferaddr_hi = 0;
1919 mbox->xferaddr = 0xFFFFFFFF;
1920 }
1921 else {
1922 mbox->cmd = MBOXCMD_PASSTHRU64;
1923
1924 megaraid_mbox_prepare_pthru(adapter, scb, scp);
1925
1926 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h;
1927 mbox64->xferaddr_hi = 0;
1928 mbox->xferaddr = 0xFFFFFFFF;
1929 }
1930 return scb;
1931 }
1932
1933 // NOT REACHED
1934}
1935
1936
1937/**
1938 * megaraid_mbox_runpendq - execute commands queued in the pending queue
1939 * @adapter : controller's soft state
1940 * @scb : SCB to be queued in the pending list
1941 *
1942 * scan the pending list for commands which are not yet issued and try to
1943 * post to the controller. The SCB can be a null pointer, which would indicate
1944 * no SCB to be queue, just try to execute the ones in the pending list.
1945 *
1946 * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1947 * out from the head of the pending list. If it is successfully issued, the
1948 * next SCB is at the head now.
1949 */
1950static void
1951megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1952{
1953 scb_t *scb;
1954 unsigned long flags;
1955
1956 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1957
1958 if (scb_q) {
1959 scb_q->state = SCB_PENDQ;
1960 list_add_tail(&scb_q->list, &adapter->pend_list);
1961 }
1962
1963 // if the adapter in not in quiescent mode, post the commands to FW
1964 if (adapter->quiescent) {
1965 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1966 return;
1967 }
1968
1969 while (!list_empty(&adapter->pend_list)) {
1970
1971 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1972
1973 scb = list_entry(adapter->pend_list.next, scb_t, list);
1974
1975 // remove the scb from the pending list and try to
1976 // issue. If we are unable to issue it, put back in
1977 // the pending list and return
1978
1979 list_del_init(&scb->list);
1980
1981 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1982
1983 // if mailbox was busy, return SCB back to pending
1984 // list. Make sure to add at the head, since that's
1985 // where it would have been removed from
1986
1987 scb->state = SCB_ISSUED;
1988
1989 if (mbox_post_cmd(adapter, scb) != 0) {
1990
1991 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1992
1993 scb->state = SCB_PENDQ;
1994
1995 list_add(&scb->list, &adapter->pend_list);
1996
1997 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1998 flags);
1999
2000 return;
2001 }
2002
2003 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2004 }
2005
2006 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2007
2008
2009 return;
2010}
2011
2012
2013/**
2014 * megaraid_mbox_prepare_pthru - prepare a command for physical devices
2015 * @adapter - pointer to controller's soft state
2016 * @scb - scsi control block
2017 * @scp - scsi command from the mid-layer
2018 *
2019 * prepare a command for the scsi physical devices
2020 */
2021static void
2022megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
2023 struct scsi_cmnd *scp)
2024{
2025 mbox_ccb_t *ccb;
2026 mraid_passthru_t *pthru;
2027 uint8_t channel;
2028 uint8_t target;
2029
2030 ccb = (mbox_ccb_t *)scb->ccb;
2031 pthru = ccb->pthru;
2032 channel = scb->dev_channel;
2033 target = scb->dev_target;
2034
2035 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2036 pthru->timeout = 4;
2037 pthru->ars = 1;
2038 pthru->islogical = 0;
2039 pthru->channel = 0;
2040 pthru->target = (channel << 4) | target;
2041 pthru->logdrv = SCP2LUN(scp);
2042 pthru->reqsenselen = 14;
2043 pthru->cdblen = scp->cmd_len;
2044
2045 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2046
2047 if (scp->request_bufflen) {
2048 pthru->dataxferlen = scp->request_bufflen;
2049 pthru->dataxferaddr = ccb->sgl_dma_h;
2050 pthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2051 }
2052 else {
2053 pthru->dataxferaddr = 0;
2054 pthru->dataxferlen = 0;
2055 pthru->numsge = 0;
2056 }
2057 return;
2058}
2059
2060
2061/**
2062 * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2063 * @adapter - pointer to controller's soft state
2064 * @scb - scsi control block
2065 * @scp - scsi command from the mid-layer
2066 *
2067 * prepare a command for the scsi physical devices. This rountine prepares
2068 * commands for devices which can take extended CDBs (>10 bytes)
2069 */
2070static void
2071megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2072 struct scsi_cmnd *scp)
2073{
2074 mbox_ccb_t *ccb;
2075 mraid_epassthru_t *epthru;
2076 uint8_t channel;
2077 uint8_t target;
2078
2079 ccb = (mbox_ccb_t *)scb->ccb;
2080 epthru = ccb->epthru;
2081 channel = scb->dev_channel;
2082 target = scb->dev_target;
2083
2084 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2085 epthru->timeout = 4;
2086 epthru->ars = 1;
2087 epthru->islogical = 0;
2088 epthru->channel = 0;
2089 epthru->target = (channel << 4) | target;
2090 epthru->logdrv = SCP2LUN(scp);
2091 epthru->reqsenselen = 14;
2092 epthru->cdblen = scp->cmd_len;
2093
2094 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2095
2096 if (scp->request_bufflen) {
2097 epthru->dataxferlen = scp->request_bufflen;
2098 epthru->dataxferaddr = ccb->sgl_dma_h;
2099 epthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2100 }
2101 else {
2102 epthru->dataxferaddr = 0;
2103 epthru->dataxferlen = 0;
2104 epthru->numsge = 0;
2105 }
2106 return;
2107}
2108
2109
2110/**
2111 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2112 * @adapter - controller's soft state
2113 *
2114 * Interrupt ackrowledgement sequence for memory mapped HBAs. Find out the
2115 * completed command and put them on the completed list for later processing.
2116 *
2117 * Returns: 1 if the interrupt is valid, 0 otherwise
2118 */
858119e1 2119static int
1da177e4
LT		 2120megaraid_ack_sequence(adapter_t *adapter)
2121{
2122 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2123 mbox_t *mbox;
2124 scb_t *scb;
2125 uint8_t nstatus;
2126 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS];
2127 struct list_head clist;
2128 int handled;
2129 uint32_t dword;
2130 unsigned long flags;
2131 int i, j;
2132
2133
2134 mbox = raid_dev->mbox;
2135
2136 // move the SCBs from the firmware completed array to our local list
2137 INIT_LIST_HEAD(&clist);
2138
2139 // loop till F/W has more commands for us to complete
2140 handled = 0;
2141 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2142 do {
2143 /*
2144 * Check if a valid interrupt is pending. If found, force the
2145 * interrupt line low.
2146 */
2147 dword = RDOUTDOOR(raid_dev);
2148 if (dword != 0x10001234) break;
2149
2150 handled = 1;
2151
2152 WROUTDOOR(raid_dev, 0x10001234);
2153
2154 nstatus = 0;
2155 // wait for valid numstatus to post
2156 for (i = 0; i < 0xFFFFF; i++) {
2157 if (mbox->numstatus != 0xFF) {
2158 nstatus = mbox->numstatus;
2159 break;
2160 }
2161 rmb();
2162 }
2163 mbox->numstatus = 0xFF;
2164
2165 adapter->outstanding_cmds -= nstatus;
2166
2167 for (i = 0; i < nstatus; i++) {
2168
2169 // wait for valid command index to post
2170 for (j = 0; j < 0xFFFFF; j++) {
2171 if (mbox->completed[i] != 0xFF) break;
2172 rmb();
2173 }
2174 completed[i] = mbox->completed[i];
2175 mbox->completed[i] = 0xFF;
2176
2177 if (completed[i] == 0xFF) {
2178 con_log(CL_ANN, (KERN_CRIT
2179 "megaraid: command posting timed out\n"));
2180
2181 BUG();
2182 continue;
2183 }
2184
2185 // Get SCB associated with this command id
2186 if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2187 // a cmm command
2188 scb = adapter->uscb_list + (completed[i] -
2189 MBOX_MAX_SCSI_CMDS);
2190 }
2191 else {
2192 // an os command
2193 scb = adapter->kscb_list + completed[i];
2194 }
2195
2196 scb->status = mbox->status;
2197 list_add_tail(&scb->list, &clist);
2198 }
2199
2200 // Acknowledge interrupt
2201 WRINDOOR(raid_dev, 0x02);
2202
2203 } while(1);
2204
2205 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2206
2207
2208 // put the completed commands in the completed list. DPC would
2209 // complete these commands later
2210 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2211
2212 list_splice(&clist, &adapter->completed_list);
2213
2214 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2215
2216
2217 // schedule the DPC if there is some work for it
2218 if (handled)
2219 tasklet_schedule(&adapter->dpc_h);
2220
2221 return handled;
2222}
2223
2224
2225/**
2226 * megaraid_isr - isr for memory based mailbox based controllers
2227 * @irq - irq
2228 * @devp - pointer to our soft state
2229 * @regs - unused
2230 *
2231 * Interrupt service routine for memory-mapped mailbox controllers.
2232 */
2233static irqreturn_t
7d12e780 2234megaraid_isr(int irq, void *devp)
1da177e4
LT		 2235{
2236 adapter_t *adapter = devp;
2237 int handled;
2238
2239 handled = megaraid_ack_sequence(adapter);
2240
2241 /* Loop through any pending requests */
2242 if (!adapter->quiescent) {
2243 megaraid_mbox_runpendq(adapter, NULL);
2244 }
2245
2246 return IRQ_RETVAL(handled);
2247}
2248
2249
2250/**
2251 * megaraid_mbox_sync_scb - sync kernel buffers
2252 * @adapter : controller's soft state
2253 * @scb : pointer to the resource packet
2254 *
2255 * DMA sync if required.
2256 */
858119e1 2257static void
1da177e4
LT		 2258megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2259{
2260 mbox_ccb_t *ccb;
2261
2262 ccb = (mbox_ccb_t *)scb->ccb;
2263
2264 switch (scb->dma_type) {
2265
2266 case MRAID_DMA_WBUF:
2267 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2268 pci_dma_sync_single_for_cpu(adapter->pdev,
2269 ccb->buf_dma_h,
2270 scb->scp->request_bufflen,
2271 PCI_DMA_FROMDEVICE);
2272 }
2273
2274 pci_unmap_page(adapter->pdev, ccb->buf_dma_h,
2275 scb->scp->request_bufflen, scb->dma_direction);
2276
2277 break;
2278
2279 case MRAID_DMA_WSG:
2280 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2281 pci_dma_sync_sg_for_cpu(adapter->pdev,
2282 scb->scp->request_buffer,
2283 scb->scp->use_sg, PCI_DMA_FROMDEVICE);
2284 }
2285
2286 pci_unmap_sg(adapter->pdev, scb->scp->request_buffer,
2287 scb->scp->use_sg, scb->dma_direction);
2288
2289 break;
2290
2291 default:
2292 break;
2293 }
2294
2295 return;
2296}
2297
2298
2299/**
2300 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2301 * @devp : pointer to HBA soft state
2302 *
2303 * Pick up the commands from the completed list and send back to the owners.
2304 * This is a reentrant function and does not assume any locks are held while
2305 * it is being called.
2306 */
2307static void
2308megaraid_mbox_dpc(unsigned long devp)
2309{
2310 adapter_t *adapter = (adapter_t *)devp;
2311 mraid_device_t *raid_dev;
2312 struct list_head clist;
2313 struct scatterlist *sgl;
2314 scb_t *scb;
2315 scb_t *tmp;
2316 struct scsi_cmnd *scp;
2317 mraid_passthru_t *pthru;
2318 mraid_epassthru_t *epthru;
2319 mbox_ccb_t *ccb;
2320 int islogical;
2321 int pdev_index;
2322 int pdev_state;
2323 mbox_t *mbox;
2324 unsigned long flags;
2325 uint8_t c;
2326 int status;
c005fb4f 2327 uioc_t *kioc;
1da177e4
LT		 2328
2329
2330 if (!adapter) return;
2331
2332 raid_dev = ADAP2RAIDDEV(adapter);
2333
2334 // move the SCBs from the completed list to our local list
2335 INIT_LIST_HEAD(&clist);
2336
2337 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2338
2339 list_splice_init(&adapter->completed_list, &clist);
2340
2341 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2342
2343
2344 list_for_each_entry_safe(scb, tmp, &clist, list) {
2345
2346 status = scb->status;
2347 scp = scb->scp;
2348 ccb = (mbox_ccb_t *)scb->ccb;
2349 pthru = ccb->pthru;
2350 epthru = ccb->epthru;
2351 mbox = ccb->mbox;
2352
2353 // Make sure f/w has completed a valid command
2354 if (scb->state != SCB_ISSUED) {
2355 con_log(CL_ANN, (KERN_CRIT
2356 "megaraid critical err: invalid command %d:%d:%p\n",
2357 scb->sno, scb->state, scp));
2358 BUG();
2359 continue; // Must never happen!
2360 }
2361
2362 // check for the management command and complete it right away
2363 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2364 scb->state = SCB_FREE;
2365 scb->status = status;
2366
2367 // remove from local clist
2368 list_del_init(&scb->list);
2369
c005fb4f
JS		 2370 kioc = (uioc_t *)scb->gp;
2371 kioc->status = 0;
2372
1da177e4
LT		 2373 megaraid_mbox_mm_done(adapter, scb);
2374
2375 continue;
2376 }
2377
2378 // Was an abort issued for this command earlier
2379 if (scb->state & SCB_ABORT) {
2380 con_log(CL_ANN, (KERN_NOTICE
2381 "megaraid: aborted cmd %lx[%x] completed\n",
2382 scp->serial_number, scb->sno));
2383 }
2384
2385 /*
2386 * If the inquiry came of a disk drive which is not part of
2387 * any RAID array, expose it to the kernel. For this to be
2388 * enabled, user must set the "megaraid_expose_unconf_disks"
2389 * flag to 1 by specifying it on module parameter list.
2390 * This would enable data migration off drives from other
2391 * configurations.
2392 */
2393 islogical = MRAID_IS_LOGICAL(adapter, scp);
2394 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2395 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2396
2397 if (scp->use_sg) {
2398 sgl = (struct scatterlist *)
2399 scp->request_buffer;
2400
2401 if (sgl->page) {
2402 c = *(unsigned char *)
2403 (page_address((&sgl[0])->page) +
2404 (&sgl[0])->offset);
2405 }
2406 else {
2407 con_log(CL_ANN, (KERN_WARNING
2408 "megaraid mailbox: invalid sg:%d\n",
2409 __LINE__));
2410 c = 0;
2411 }
2412 }
2413 else {
2414 c = *(uint8_t *)scp->request_buffer;
2415 }
2416
2417 if ((c & 0x1F ) == TYPE_DISK) {
2418 pdev_index = (scb->dev_channel * 16) +
2419 scb->dev_target;
2420 pdev_state =
2421 raid_dev->pdrv_state[pdev_index] & 0x0F;
2422
2423 if (pdev_state == PDRV_ONLINE ||
2424 pdev_state == PDRV_FAILED ||
2425 pdev_state == PDRV_RBLD ||
2426 pdev_state == PDRV_HOTSPARE ||
2427 megaraid_expose_unconf_disks == 0) {
2428
2429 status = 0xF0;
2430 }
2431 }
2432 }
2433
2434 // Convert MegaRAID status to Linux error code
2435 switch (status) {
2436
2437 case 0x00:
2438
2439 scp->result = (DID_OK << 16);
2440 break;
2441
2442 case 0x02:
2443
2444 /* set sense_buffer and result fields */
2445 if (mbox->cmd == MBOXCMD_PASSTHRU ||
2446 mbox->cmd == MBOXCMD_PASSTHRU64) {
2447
2448 memcpy(scp->sense_buffer, pthru->reqsensearea,
2449 14);
2450
2451 scp->result = DRIVER_SENSE << 24 |
2452 DID_OK << 16 | CHECK_CONDITION << 1;
2453 }
2454 else {
2455 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2456
2457 memcpy(scp->sense_buffer,
2458 epthru->reqsensearea, 14);
2459
2460 scp->result = DRIVER_SENSE << 24 |
2461 DID_OK << 16 |
2462 CHECK_CONDITION << 1;
2463 } else {
2464 scp->sense_buffer[0] = 0x70;
2465 scp->sense_buffer[2] = ABORTED_COMMAND;
2466 scp->result = CHECK_CONDITION << 1;
2467 }
2468 }
2469 break;
2470
2471 case 0x08:
2472
2473 scp->result = DID_BUS_BUSY << 16 | status;
2474 break;
2475
2476 default:
2477
2478 /*
2479 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2480 * failed
2481 */
2482 if (scp->cmnd[0] == TEST_UNIT_READY) {
2483 scp->result = DID_ERROR << 16 |
2484 RESERVATION_CONFLICT << 1;
2485 }
2486 else
2487 /*
2488 * Error code returned is 1 if Reserve or Release
2489 * failed or the input parameter is invalid
2490 */
2491 if (status == 1 && (scp->cmnd[0] == RESERVE ||
2492 scp->cmnd[0] == RELEASE)) {
2493
2494 scp->result = DID_ERROR << 16 |
2495 RESERVATION_CONFLICT << 1;
2496 }
2497 else {
2498 scp->result = DID_BAD_TARGET << 16 | status;
2499 }
2500 }
2501
2502 // print a debug message for all failed commands
2503 if (status) {
2504 megaraid_mbox_display_scb(adapter, scb);
2505 }
2506
2507 // Free our internal resources and call the mid-layer callback
2508 // routine
2509 megaraid_mbox_sync_scb(adapter, scb);
2510
2511 // remove from local clist
2512 list_del_init(&scb->list);
2513
2514 // put back in free list
2515 megaraid_dealloc_scb(adapter, scb);
2516
2517 // send the scsi packet back to kernel
1da177e4 2518 scp->scsi_done(scp);
1da177e4
LT		 2519 }
2520
2521 return;
2522}
2523
2524
2525/**
2526 * megaraid_abort_handler - abort the scsi command
2527 * @scp : command to be aborted
2528 *
2529 * Abort a previous SCSI request. Only commands on the pending list can be
2530 * aborted. All the commands issued to the F/W must complete.
2531 **/
2532static int
f2c8dc40 2533megaraid_abort_handler(struct scsi_cmnd *scp)
1da177e4
LT		 2534{
2535 adapter_t *adapter;
2536 mraid_device_t *raid_dev;
2537 scb_t *scb;
2538 scb_t *tmp;
2539 int found;
2540 unsigned long flags;
2541 int i;
2542
2543
2544 adapter = SCP2ADAPTER(scp);
2545 raid_dev = ADAP2RAIDDEV(adapter);
2546
1da177e4
LT		 2547 con_log(CL_ANN, (KERN_WARNING
2548 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2549 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2550 SCP2TARGET(scp), SCP2LUN(scp)));
2551
2552 // If FW has stopped responding, simply return failure
2553 if (raid_dev->hw_error) {
2554 con_log(CL_ANN, (KERN_NOTICE
2555 "megaraid: hw error, not aborting\n"));
2556 return FAILED;
2557 }
2558
2559 // There might a race here, where the command was completed by the
2560 // firmware and now it is on the completed list. Before we could
2561 // complete the command to the kernel in dpc, the abort came.
2562 // Find out if this is the case to avoid the race.
2563 scb = NULL;
2564 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2565 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2566
2567 if (scb->scp == scp) { // Found command
2568
2569 list_del_init(&scb->list); // from completed list
2570
2571 con_log(CL_ANN, (KERN_WARNING
2572 "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2573 scp->serial_number, scb->sno,
2574 scb->dev_channel, scb->dev_target));
2575
2576 scp->result = (DID_ABORT << 16);
2577 scp->scsi_done(scp);
2578
2579 megaraid_dealloc_scb(adapter, scb);
2580
2581 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2582 flags);
2583
2584 return SUCCESS;
2585 }
2586 }
2587 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2588
2589
2590 // Find out if this command is still on the pending list. If it is and
2591 // was never issued, abort and return success. If the command is owned
2592 // by the firmware, we must wait for it to complete by the FW.
2593 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2594 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2595
2596 if (scb->scp == scp) { // Found command
2597
2598 list_del_init(&scb->list); // from pending list
2599
2600 ASSERT(!(scb->state & SCB_ISSUED));
2601
2602 con_log(CL_ANN, (KERN_WARNING
2603 "megaraid abort: %ld[%d:%d], driver owner\n",
2604 scp->serial_number, scb->dev_channel,
2605 scb->dev_target));
2606
2607 scp->result = (DID_ABORT << 16);
2608 scp->scsi_done(scp);
2609
2610 megaraid_dealloc_scb(adapter, scb);
2611
2612 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2613 flags);
2614
2615 return SUCCESS;
2616 }
2617 }
2618 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2619
2620
2621 // Check do we even own this command, in which case this would be
2622 // owned by the firmware. The only way to locate the FW scb is to
2623 // traverse through the list of all SCB, since driver does not
2624 // maintain these SCBs on any list
2625 found = 0;
f2c8dc40 2626 spin_lock_irq(&adapter->lock);
1da177e4
LT		 2627 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2628 scb = adapter->kscb_list + i;
2629
2630 if (scb->scp == scp) {
2631
2632 found = 1;
2633
2634 if (!(scb->state & SCB_ISSUED)) {
2635 con_log(CL_ANN, (KERN_WARNING
2636 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2637 scp->serial_number, scb->sno, scb->dev_channel,
2638 scb->dev_target));
2639 BUG();
2640 }
2641 else {
2642 con_log(CL_ANN, (KERN_WARNING
2643 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2644 scp->serial_number, scb->sno, scb->dev_channel,
2645 scb->dev_target));
2646 }
2647 }
2648 }
f2c8dc40 2649 spin_unlock_irq(&adapter->lock);
1da177e4
LT		 2650
2651 if (!found) {
2652 con_log(CL_ANN, (KERN_WARNING
2653 "megaraid abort: scsi cmd:%ld, do now own\n",
2654 scp->serial_number));
2655
2656 // FIXME: Should there be a callback for this command?
2657 return SUCCESS;
2658 }
2659
2660 // We cannot actually abort a command owned by firmware, return
2661 // failure and wait for reset. In host reset handler, we will find out
2662 // if the HBA is still live
2663 return FAILED;
2664}
2665
1da177e4
LT		 2666/**
2667 * megaraid_reset_handler - device reset hadler for mailbox based driver
2668 * @scp : reference command
2669 *
2670 * Reset handler for the mailbox based controller. First try to find out if
2671 * the FW is still live, in which case the outstanding commands counter mut go
2672 * down to 0. If that happens, also issue the reservation reset command to
2673 * relinquish (possible) reservations on the logical drives connected to this
2674 * host
2675 **/
2676static int
f2c8dc40 2677megaraid_reset_handler(struct scsi_cmnd *scp)
1da177e4
LT		 2678{
2679 adapter_t *adapter;
2680 scb_t *scb;
2681 scb_t *tmp;
2682 mraid_device_t *raid_dev;
2683 unsigned long flags;
2684 uint8_t raw_mbox[sizeof(mbox_t)];
2685 int rval;
2686 int recovery_window;
2687 int recovering;
2688 int i;
c005fb4f 2689 uioc_t *kioc;
1da177e4
LT		 2690
2691 adapter = SCP2ADAPTER(scp);
2692 raid_dev = ADAP2RAIDDEV(adapter);
2693
1da177e4
LT		 2694 // return failure if adapter is not responding
2695 if (raid_dev->hw_error) {
2696 con_log(CL_ANN, (KERN_NOTICE
2697 "megaraid: hw error, cannot reset\n"));
2698 return FAILED;
2699 }
2700
2701
2702 // Under exceptional conditions, FW can take up to 3 minutes to
2703 // complete command processing. Wait for additional 2 minutes for the
2704 // pending commands counter to go down to 0. If it doesn't, let the
2705 // controller be marked offline
2706 // Also, reset all the commands currently owned by the driver
2707 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2708 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
1da177e4
LT		 2709 list_del_init(&scb->list); // from pending list
2710
c005fb4f
JS		 2711 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2712 con_log(CL_ANN, (KERN_WARNING
2713 "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2714 scb->sno, scb->dev_channel, scb->dev_target));
1da177e4 2715
c005fb4f 2716 scb->status = -1;
1da177e4 2717
c005fb4f
JS		 2718 kioc = (uioc_t *)scb->gp;
2719 kioc->status = -EFAULT;
2720
2721 megaraid_mbox_mm_done(adapter, scb);
2722 } else {
2723 if (scb->scp == scp) { // Found command
2724 con_log(CL_ANN, (KERN_WARNING
2725 "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2726 scp->serial_number, scb->sno,
2727 scb->dev_channel, scb->dev_target));
2728 } else {
2729 con_log(CL_ANN, (KERN_WARNING
2730 "megaraid: IO packet with %d[%d:%d] being reset\n",
2731 scb->sno, scb->dev_channel, scb->dev_target));
2732 }
2733
2734 scb->scp->result = (DID_RESET << 16);
2735 scb->scp->scsi_done(scb->scp);
2736
2737 megaraid_dealloc_scb(adapter, scb);
2738 }
1da177e4
LT		 2739 }
2740 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2741
2742 if (adapter->outstanding_cmds) {
2743 con_log(CL_ANN, (KERN_NOTICE
2744 "megaraid: %d outstanding commands. Max wait %d sec\n",
c005fb4f
JS		 2745 adapter->outstanding_cmds,
2746 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
1da177e4
LT		 2747 }
2748
1da177e4
LT		 2749 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2750
2751 recovering = adapter->outstanding_cmds;
2752
c005fb4f 2753 for (i = 0; i < recovery_window; i++) {
1da177e4
LT		 2754
2755 megaraid_ack_sequence(adapter);
2756
2757 // print a message once every 5 seconds only
2758 if (!(i % 5)) {
2759 con_log(CL_ANN, (
2760 "megaraid mbox: Wait for %d commands to complete:%d\n",
2761 adapter->outstanding_cmds,
c005fb4f 2762 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
1da177e4
LT		 2763 }
2764
2765 // bailout if no recovery happended in reset time
c005fb4f 2766 if (adapter->outstanding_cmds == 0) {
1da177e4
LT		 2767 break;
2768 }
2769
2770 msleep(1000);
2771 }
2772
f2c8dc40 2773 spin_lock(&adapter->lock);
1da177e4
LT		 2774
2775 // If still outstanding commands, bail out
2776 if (adapter->outstanding_cmds) {
2777 con_log(CL_ANN, (KERN_WARNING
2778 "megaraid mbox: critical hardware error!\n"));
2779
2780 raid_dev->hw_error = 1;
2781
f2c8dc40
CH		 2782 rval = FAILED;
2783 goto out;
1da177e4
LT		 2784 }
2785 else {
2786 con_log(CL_ANN, (KERN_NOTICE
2787 "megaraid mbox: reset sequence completed sucessfully\n"));
2788 }
2789
2790
2791 // If the controller supports clustering, reset reservations
f2c8dc40
CH		 2792 if (!adapter->ha) {
2793 rval = SUCCESS;
2794 goto out;
2795 }
1da177e4
LT		 2796
2797 // clear reservations if any
2798 raw_mbox[0] = CLUSTER_CMD;
2799 raw_mbox[2] = RESET_RESERVATIONS;
2800
2801 rval = SUCCESS;
2802 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2803 con_log(CL_ANN,
2804 (KERN_INFO "megaraid: reservation reset\n"));
2805 }
2806 else {
2807 rval = FAILED;
2808 con_log(CL_ANN, (KERN_WARNING
2809 "megaraid: reservation reset failed\n"));
2810 }
2811
f2c8dc40
CH		 2812 out:
2813 spin_unlock_irq(&adapter->lock);
1da177e4
LT		 2814 return rval;
2815}
2816
1da177e4
LT		 2817/*
2818 * START: internal commands library
2819 *
2820 * This section of the driver has the common routine used by the driver and
2821 * also has all the FW routines
2822 */
2823
2824/**
2825 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2826 * @adapter - controller's soft state
2827 * @raw_mbox - the mailbox
2828 *
2829 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2830 * controllers
2831 */
2832static int
2833mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2834{
2835 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2836 mbox64_t *mbox64;
2837 mbox_t *mbox;
2838 uint8_t status;
2839 int i;
2840
2841
2842 mbox64 = raid_dev->mbox64;
2843 mbox = raid_dev->mbox;
2844
2845 /*
2846 * Wait until mailbox is free
2847 */
2848 if (megaraid_busywait_mbox(raid_dev) != 0)
2849 goto blocked_mailbox;
2850
2851 /*
2852 * Copy mailbox data into host structure
2853 */
2854 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2855 mbox->cmdid = 0xFE;
2856 mbox->busy = 1;
2857 mbox->poll = 0;
2858 mbox->ack = 0;
2859 mbox->numstatus = 0xFF;
2860 mbox->status = 0xFF;
2861
2862 wmb();
2863 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2864
2865 // wait for maximum 1 second for status to post. If the status is not
2866 // available within 1 second, assume FW is initializing and wait
2867 // for an extended amount of time
2868 if (mbox->numstatus == 0xFF) { // status not yet available
53b3531b 2869 udelay(25);
1da177e4
LT		 2870
2871 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2872 rmb();
2873 msleep(1);
2874 }
2875
2876
2877 if (i == 1000) {
2878 con_log(CL_ANN, (KERN_NOTICE
2879 "megaraid mailbox: wait for FW to boot "));
2880
2881 for (i = 0; (mbox->numstatus == 0xFF) &&
2882 (i < MBOX_RESET_WAIT); i++) {
2883 rmb();
2884 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2885 MBOX_RESET_WAIT - i));
2886 msleep(1000);
2887 }
2888
2889 if (i == MBOX_RESET_WAIT) {
2890
2891 con_log(CL_ANN, (
2892 "\nmegaraid mailbox: status not available\n"));
2893
2894 return -1;
2895 }
2896 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2897 }
2898 }
2899
2900 // wait for maximum 1 second for poll semaphore
2901 if (mbox->poll != 0x77) {
2902 udelay(25);
2903
2904 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2905 rmb();
2906 msleep(1);
2907 }
2908
2909 if (i == 1000) {
2910 con_log(CL_ANN, (KERN_WARNING
2911 "megaraid mailbox: could not get poll semaphore\n"));
2912 return -1;
2913 }
2914 }
2915
2916 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2917 wmb();
2918
2919 // wait for maximum 1 second for acknowledgement
2920 if (RDINDOOR(raid_dev) & 0x2) {
2921 udelay(25);
2922
2923 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2924 rmb();
2925 msleep(1);
2926 }
2927
2928 if (i == 1000) {
2929 con_log(CL_ANN, (KERN_WARNING
2930 "megaraid mailbox: could not acknowledge\n"));
2931 return -1;
2932 }
2933 }
2934 mbox->poll = 0;
2935 mbox->ack = 0x77;
2936
2937 status = mbox->status;
2938
2939 // invalidate the completed command id array. After command
2940 // completion, firmware would write the valid id.
2941 mbox->numstatus = 0xFF;
2942 mbox->status = 0xFF;
2943 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2944 mbox->completed[i] = 0xFF;
2945 }
2946
2947 return status;
2948
2949blocked_mailbox:
2950
2951 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2952 return -1;
2953}
2954
2955
2956/**
2957 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2958 * @adapter - controller's soft state
2959 * @raw_mbox - the mailbox
2960 *
2961 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2962 * controllers. This is a faster version of the synchronous command and
2963 * therefore can be called in interrupt-context as well
2964 */
2965static int
2966mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2967{
2968 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2969 mbox_t *mbox;
2970 long i;
2971
2972
2973 mbox = raid_dev->mbox;
2974
2975 // return immediately if the mailbox is busy
2976 if (mbox->busy) return -1;
2977
2978 // Copy mailbox data into host structure
2979 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2980 mbox->cmdid = 0xFE;
2981 mbox->busy = 1;
2982 mbox->poll = 0;
2983 mbox->ack = 0;
2984 mbox->numstatus = 0xFF;
2985 mbox->status = 0xFF;
2986
2987 wmb();
2988 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2989
c005fb4f 2990 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
1da177e4 2991 if (mbox->numstatus != 0xFF) break;
ed7e8ef7 2992 rmb();
c005fb4f 2993 udelay(MBOX_SYNC_DELAY_200);
1da177e4
LT		 2994 }
2995
c005fb4f 2996 if (i == MBOX_SYNC_WAIT_CNT) {
1da177e4
LT		 2997 // We may need to re-calibrate the counter
2998 con_log(CL_ANN, (KERN_CRIT
2999 "megaraid: fast sync command timed out\n"));
3000 }
3001
3002 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
3003 wmb();
3004
3005 return mbox->status;
3006}
3007
3008
3009/**
3010 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
3011 * @raid_dev - RAID device (HBA) soft state
3012 *
3013 * wait until the controller's mailbox is available to accept more commands.
3014 * wait for at most 1 second
3015 */
3016static int
3017megaraid_busywait_mbox(mraid_device_t *raid_dev)
3018{
3019 mbox_t *mbox = raid_dev->mbox;
3020 int i = 0;
3021
3022 if (mbox->busy) {
3023 udelay(25);
3024 for (i = 0; mbox->busy && i < 1000; i++)
3025 msleep(1);
3026 }
3027
3028 if (i < 1000) return 0;
3029 else return -1;
3030}
3031
3032
3033/**
3034 * megaraid_mbox_product_info - some static information about the controller
3035 * @adapter - our soft state
3036 *
3037 * issue commands to the controller to grab some parameters required by our
3038 * caller.
3039 */
3040static int
3041megaraid_mbox_product_info(adapter_t *adapter)
3042{
3043 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3044 mbox_t *mbox;
3045 uint8_t raw_mbox[sizeof(mbox_t)];
3046 mraid_pinfo_t *pinfo;
3047 dma_addr_t pinfo_dma_h;
3048 mraid_inquiry3_t *mraid_inq3;
3049 int i;
3050
3051
3052 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3053 mbox = (mbox_t *)raw_mbox;
3054
3055 /*
3056 * Issue an ENQUIRY3 command to find out certain adapter parameters,
3057 * e.g., max channels, max commands etc.
3058 */
3059 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3060 &pinfo_dma_h);
3061
3062 if (pinfo == NULL) {
3063 con_log(CL_ANN, (KERN_WARNING
3064 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3065 __LINE__));
3066
3067 return -1;
3068 }
3069 memset(pinfo, 0, sizeof(mraid_pinfo_t));
3070
3071 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3072 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3073
3074 raw_mbox[0] = FC_NEW_CONFIG;
3075 raw_mbox[2] = NC_SUBOP_ENQUIRY3;
3076 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
3077
3078 // Issue the command
3079 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3080
3081 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3082
3083 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3084 pinfo, pinfo_dma_h);
3085
3086 return -1;
3087 }
3088
3089 /*
3090 * Collect information about state of each physical drive
3091 * attached to the controller. We will expose all the disks
3092 * which are not part of RAID
3093 */
3094 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3095 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3096 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3097 }
3098
3099 /*
3100 * Get product info for information like number of channels,
3101 * maximum commands supported.
3102 */
3103 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3104 mbox->xferaddr = (uint32_t)pinfo_dma_h;
3105
3106 raw_mbox[0] = FC_NEW_CONFIG;
3107 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3108
3109 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3110
3111 con_log(CL_ANN, (KERN_WARNING
3112 "megaraid: product info failed\n"));
3113
3114 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3115 pinfo, pinfo_dma_h);
3116
3117 return -1;
3118 }
3119
3120 /*
3121 * Setup some parameters for host, as required by our caller
3122 */
3123 adapter->max_channel = pinfo->nchannels;
3124
3125 /*
3126 * we will export all the logical drives on a single channel.
3127 * Add 1 since inquires do not come for inititor ID
3128 */
3129 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1;
3130 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices
3131
3132 /*
3133 * These are the maximum outstanding commands for the scsi-layer
3134 */
3135 adapter->max_cmds = MBOX_MAX_SCSI_CMDS;
3136
3137 memset(adapter->fw_version, 0, VERSION_SIZE);
3138 memset(adapter->bios_version, 0, VERSION_SIZE);
3139
3140 memcpy(adapter->fw_version, pinfo->fw_version, 4);
3141 adapter->fw_version[4] = 0;
3142
3143 memcpy(adapter->bios_version, pinfo->bios_version, 4);
3144 adapter->bios_version[4] = 0;
3145
3146 con_log(CL_ANN, (KERN_NOTICE
3147 "megaraid: fw version:[%s] bios version:[%s]\n",
3148 adapter->fw_version, adapter->bios_version));
3149
3150 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3151 pinfo_dma_h);
3152
3153 return 0;
3154}
3155
3156
3157
3158/**
3159 * megaraid_mbox_extended_cdb - check for support for extended CDBs
3160 * @adapter - soft state for the controller
3161 *
3162 * this routine check whether the controller in question supports extended
3163 * ( > 10 bytes ) CDBs
3164 */
3165static int
3166megaraid_mbox_extended_cdb(adapter_t *adapter)
3167{
3168 mbox_t *mbox;
3169 uint8_t raw_mbox[sizeof(mbox_t)];
3170 int rval;
3171
3172 mbox = (mbox_t *)raw_mbox;
3173
3174 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3175 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3176
3177 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3178
3179 raw_mbox[0] = MAIN_MISC_OPCODE;
3180 raw_mbox[2] = SUPPORT_EXT_CDB;
3181
3182 /*
3183 * Issue the command
3184 */
3185 rval = 0;
3186 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3187 rval = -1;
3188 }
3189
3190 return rval;
3191}
3192
3193
3194/**
3195 * megaraid_mbox_support_ha - Do we support clustering
3196 * @adapter - soft state for the controller
3197 * @init_id - ID of the initiator
3198 *
3199 * Determine if the firmware supports clustering and the ID of the initiator.
3200 */
3201static int
3202megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3203{
3204 mbox_t *mbox;
3205 uint8_t raw_mbox[sizeof(mbox_t)];
3206 int rval;
3207
3208
3209 mbox = (mbox_t *)raw_mbox;
3210
3211 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3212
3213 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3214
3215 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3216
3217 raw_mbox[0] = GET_TARGET_ID;
3218
3219 // Issue the command
3220 *init_id = 7;
3221 rval = -1;
3222 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3223
3224 *init_id = *(uint8_t *)adapter->ibuf;
3225
3226 con_log(CL_ANN, (KERN_INFO
3227 "megaraid: cluster firmware, initiator ID: %d\n",
3228 *init_id));
3229
3230 rval = 0;
3231 }
3232
3233 return rval;
3234}
3235
3236
3237/**
3238 * megaraid_mbox_support_random_del - Do we support random deletion
3239 * @adapter - soft state for the controller
3240 *
3241 * Determine if the firmware supports random deletion
3242 * Return: 1 is operation supported, 0 otherwise
3243 */
3244static int
3245megaraid_mbox_support_random_del(adapter_t *adapter)
3246{
3247 mbox_t *mbox;
3248 uint8_t raw_mbox[sizeof(mbox_t)];
3249 int rval;
3250
3251
3252 mbox = (mbox_t *)raw_mbox;
3253
3254 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3255
3256 raw_mbox[0] = FC_DEL_LOGDRV;
3257 raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3258
3259 // Issue the command
3260 rval = 0;
3261 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3262
3263 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3264
3265 rval = 1;
3266 }
3267
3268 return rval;
3269}
3270
3271
3272/**
3273 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3274 * @adapter - soft state for the controller
3275 *
3276 * Find out the maximum number of scatter-gather elements supported by the
3277 * firmware
3278 */
3279static int
3280megaraid_mbox_get_max_sg(adapter_t *adapter)
3281{
3282 mbox_t *mbox;
3283 uint8_t raw_mbox[sizeof(mbox_t)];
3284 int nsg;
3285
3286
3287 mbox = (mbox_t *)raw_mbox;
3288
3289 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3290
3291 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3292
3293 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3294
3295 raw_mbox[0] = MAIN_MISC_OPCODE;
3296 raw_mbox[2] = GET_MAX_SG_SUPPORT;
3297
3298 // Issue the command
3299 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3300 nsg = *(uint8_t *)adapter->ibuf;
3301 }
3302 else {
3303 nsg = MBOX_DEFAULT_SG_SIZE;
3304 }
3305
3306 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3307
3308 return nsg;
3309}
3310
3311
3312/**
3313 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3314 * @adapter - soft state for the controller
3315 *
3316 * Enumerate the RAID and SCSI channels for ROMB platoforms so that channels
3317 * can be exported as regular SCSI channels
3318 */
3319static void
3320megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3321{
3322 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3323 mbox_t *mbox;
3324 uint8_t raw_mbox[sizeof(mbox_t)];
3325
3326
3327 mbox = (mbox_t *)raw_mbox;
3328
3329 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3330
3331 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3332
3333 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3334
3335 raw_mbox[0] = CHNL_CLASS;
3336 raw_mbox[2] = GET_CHNL_CLASS;
3337
3338 // Issue the command. If the command fails, all channels are RAID
3339 // channels
3340 raid_dev->channel_class = 0xFF;
3341 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3342 raid_dev->channel_class = *(uint8_t *)adapter->ibuf;
3343 }
3344
3345 return;
3346}
3347
3348
3349/**
3350 * megaraid_mbox_flush_cache - flush adapter and disks cache
3351 * @param adapter : soft state for the controller
3352 *
3353 * Flush adapter cache followed by disks cache
3354 */
3355static void
3356megaraid_mbox_flush_cache(adapter_t *adapter)
3357{
3358 mbox_t *mbox;
3359 uint8_t raw_mbox[sizeof(mbox_t)];
3360
3361
3362 mbox = (mbox_t *)raw_mbox;
3363
3364 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3365
3366 raw_mbox[0] = FLUSH_ADAPTER;
3367
3368 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3369 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3370 }
3371
3372 raw_mbox[0] = FLUSH_SYSTEM;
3373
3374 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3375 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3376 }
3377
3378 return;
3379}
3380
3381
3382/**
3383 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3384 * @param adapter : controllers' soft state
3385 * @param scb : SCB to be displayed
3386 * @param level : debug level for console print
3387 *
3388 * Diplay information about the given SCB iff the current debug level is
3389 * verbose
3390 */
3391static void
3392megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3393{
3394 mbox_ccb_t *ccb;
3395 struct scsi_cmnd *scp;
3396 mbox_t *mbox;
3397 int level;
3398 int i;
3399
3400
3401 ccb = (mbox_ccb_t *)scb->ccb;
3402 scp = scb->scp;
3403 mbox = ccb->mbox;
3404
3405 level = CL_DLEVEL3;
3406
3407 con_log(level, (KERN_NOTICE
3408 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3409 mbox->cmd, scb->sno));
3410
3411 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3412 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3413 mbox->numsge));
3414
3415 if (!scp) return;
3416
3417 con_log(level, (KERN_NOTICE "scsi cmnd: "));
3418
3419 for (i = 0; i < scp->cmd_len; i++) {
3420 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3421 }
3422
3423 con_log(level, ("\n"));
3424
3425 return;
3426}
3427
3428
3429/**
3430 * megaraid_mbox_setup_device_map - manage device ids
3431 * @adapter : Driver's soft state
3432 *
3433 * Manange the device ids to have an appropraite mapping between the kernel
3434 * scsi addresses and megaraid scsi and logical drive addresses. We export
3435 * scsi devices on their actual addresses, whereas the logical drives are
3436 * exported on a virtual scsi channel.
3437 **/
3438static void
3439megaraid_mbox_setup_device_map(adapter_t *adapter)
3440{
3441 uint8_t c;
3442 uint8_t t;
3443
3444 /*
3445 * First fill the values on the logical drive channel
3446 */
3447 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3448 adapter->device_ids[adapter->max_channel][t] =
3449 (t < adapter->init_id) ? t : t - 1;
3450
3451 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3452
3453 /*
3454 * Fill the values on the physical devices channels
3455 */
3456 for (c = 0; c < adapter->max_channel; c++)
3457 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3458 adapter->device_ids[c][t] = (c << 8) | t;
3459}
3460
3461
3462/*
3463 * END: internal commands library
3464 */
3465
3466/*
3467 * START: Interface for the common management module
3468 *
3469 * This is the module, which interfaces with the common mangement module to
3470 * provide support for ioctl and sysfs
3471 */
3472
3473/**
3474 * megaraid_cmm_register - register with the mangement module
3475 * @param adapter : HBA soft state
3476 *
3477 * Register with the management module, which allows applications to issue
3478 * ioctl calls to the drivers. This interface is used by the management module
3479 * to setup sysfs support as well.
3480 */
3481static int
3482megaraid_cmm_register(adapter_t *adapter)
3483{
3484 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3485 mraid_mmadp_t adp;
3486 scb_t *scb;
3487 mbox_ccb_t *ccb;
3488 int rval;
3489 int i;
3490
3491 // Allocate memory for the base list of scb for management module.
3492 adapter->uscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_USER_CMDS,
3493 GFP_KERNEL);
3494
3495 if (adapter->uscb_list == NULL) {
3496 con_log(CL_ANN, (KERN_WARNING
3497 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3498 __LINE__));
3499 return -1;
3500 }
3501 memset(adapter->uscb_list, 0, sizeof(scb_t) * MBOX_MAX_USER_CMDS);
3502
3503
3504 // Initialize the synchronization parameters for resources for
3505 // commands for management module
3506 INIT_LIST_HEAD(&adapter->uscb_pool);
3507
3508 spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3509
3510
3511
3512 // link all the packets. Note, CCB for commands, coming from the
3513 // commom management module, mailbox physical address are already
3514 // setup by it. We just need placeholder for that in our local command
3515 // control blocks
3516 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3517
3518 scb = adapter->uscb_list + i;
3519 ccb = raid_dev->uccb_list + i;
3520
3521 scb->ccb = (caddr_t)ccb;
3522 ccb->mbox64 = raid_dev->umbox64 + i;
3523 ccb->mbox = &ccb->mbox64->mbox32;
3524 ccb->raw_mbox = (uint8_t *)ccb->mbox;
3525
3526 scb->gp = 0;
3527
3528 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3529 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3530 scb->sno = i + MBOX_MAX_SCSI_CMDS;
3531
3532 scb->scp = NULL;
3533 scb->state = SCB_FREE;
3534 scb->dma_direction = PCI_DMA_NONE;
3535 scb->dma_type = MRAID_DMA_NONE;
3536 scb->dev_channel = -1;
3537 scb->dev_target = -1;
3538
3539 // put scb in the free pool
3540 list_add_tail(&scb->list, &adapter->uscb_pool);
3541 }
3542
3543 adp.unique_id = adapter->unique_id;
3544 adp.drvr_type = DRVRTYPE_MBOX;
3545 adp.drvr_data = (unsigned long)adapter;
3546 adp.pdev = adapter->pdev;
3547 adp.issue_uioc = megaraid_mbox_mm_handler;
c005fb4f 3548 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
1da177e4
LT		 3549 adp.max_kioc = MBOX_MAX_USER_CMDS;
3550
3551 if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3552
3553 con_log(CL_ANN, (KERN_WARNING
3554 "megaraid mbox: did not register with CMM\n"));
3555
3556 kfree(adapter->uscb_list);
3557 }
3558
3559 return rval;
3560}
3561
3562
3563/**
3564 * megaraid_cmm_unregister - un-register with the mangement module
3565 * @param adapter : HBA soft state
3566 *
3567 * Un-register with the management module.
3568 * FIXME: mgmt module must return failure for unregister if it has pending
3569 * commands in LLD
3570 */
3571static int
3572megaraid_cmm_unregister(adapter_t *adapter)
3573{
3574 kfree(adapter->uscb_list);
3575 mraid_mm_unregister_adp(adapter->unique_id);
3576 return 0;
3577}
3578
3579
3580/**
3581 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3582 * @param drvr_data : LLD specific data
3583 * @param kioc : CMM interface packet
3584 * @param action : command action
3585 *
3586 * This routine is invoked whenever the Common Mangement Module (CMM) has a
3587 * command for us. The 'action' parameter specifies if this is a new command
3588 * or otherwise.
3589 */
3590static int
3591megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3592{
3593 adapter_t *adapter;
3594
3595 if (action != IOCTL_ISSUE) {
3596 con_log(CL_ANN, (KERN_WARNING
3597 "megaraid: unsupported management action:%#2x\n",
3598 action));
3599 return (-ENOTSUPP);
3600 }
3601
3602 adapter = (adapter_t *)drvr_data;
3603
3604 // make sure this adapter is not being detached right now.
3605 if (atomic_read(&adapter->being_detached)) {
3606 con_log(CL_ANN, (KERN_WARNING
3607 "megaraid: reject management request, detaching\n"));
3608 return (-ENODEV);
3609 }
3610
3611 switch (kioc->opcode) {
3612
3613 case GET_ADAP_INFO:
3614
3615 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *)
3616 (unsigned long)kioc->buf_vaddr);
3617
3618 kioc->done(kioc);
3619
3620 return kioc->status;
3621
3622 case MBOX_CMD:
3623
3624 return megaraid_mbox_mm_command(adapter, kioc);
3625
3626 default:
3627 kioc->status = (-EINVAL);
3628 kioc->done(kioc);
3629 return (-EINVAL);
3630 }
3631
3632 return 0; // not reached
3633}
3634
3635/**
3636 * megaraid_mbox_mm_command - issues commands routed through CMM
3637 * @param adapter : HBA soft state
3638 * @param kioc : management command packet
3639 *
3640 * Issues commands, which are routed through the management module.
3641 */
3642static int
3643megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3644{
3645 struct list_head *head = &adapter->uscb_pool;
3646 mbox64_t *mbox64;
3647 uint8_t *raw_mbox;
3648 scb_t *scb;
3649 mbox_ccb_t *ccb;
3650 unsigned long flags;
3651
3652 // detach one scb from free pool
3653 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3654
3655 if (list_empty(head)) { // should never happen because of CMM
3656
3657 con_log(CL_ANN, (KERN_WARNING
3658 "megaraid mbox: bug in cmm handler, lost resources\n"));
3659
3660 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3661
3662 return (-EINVAL);
3663 }
3664
3665 scb = list_entry(head->next, scb_t, list);
3666 list_del_init(&scb->list);
3667
3668 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3669
3670 scb->state = SCB_ACTIVE;
3671 scb->dma_type = MRAID_DMA_NONE;
3672 scb->dma_direction = PCI_DMA_NONE;
3673
3674 ccb = (mbox_ccb_t *)scb->ccb;
3675 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3676 raw_mbox = (uint8_t *)&mbox64->mbox32;
3677
3678 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3679
3680 scb->gp = (unsigned long)kioc;
3681
3682 /*
3683 * If it is a logdrv random delete operation, we have to wait till
3684 * there are no outstanding cmds at the fw and then issue it directly
3685 */
3686 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3687
3688 if (wait_till_fw_empty(adapter)) {
3689 con_log(CL_ANN, (KERN_NOTICE
3690 "megaraid mbox: LD delete, timed out\n"));
3691
3692 kioc->status = -ETIME;
3693
3694 scb->status = -1;
3695
3696 megaraid_mbox_mm_done(adapter, scb);
3697
3698 return (-ETIME);
3699 }
3700
3701 INIT_LIST_HEAD(&scb->list);
3702
3703 scb->state = SCB_ISSUED;
3704 if (mbox_post_cmd(adapter, scb) != 0) {
3705
3706 con_log(CL_ANN, (KERN_NOTICE
3707 "megaraid mbox: LD delete, mailbox busy\n"));
3708
3709 kioc->status = -EBUSY;
3710
3711 scb->status = -1;
3712
3713 megaraid_mbox_mm_done(adapter, scb);
3714
3715 return (-EBUSY);
3716 }
3717
3718 return 0;
3719 }
3720
3721 // put the command on the pending list and execute
3722 megaraid_mbox_runpendq(adapter, scb);
3723
3724 return 0;
3725}
3726
3727
3728static int
3729wait_till_fw_empty(adapter_t *adapter)
3730{
3731 unsigned long flags = 0;
3732 int i;
3733
3734
3735 /*
3736 * Set the quiescent flag to stop issuing cmds to FW.
3737 */
f2c8dc40 3738 spin_lock_irqsave(&adapter->lock, flags);
1da177e4 3739 adapter->quiescent++;
f2c8dc40 3740 spin_unlock_irqrestore(&adapter->lock, flags);
1da177e4
LT		 3741
3742 /*
3743 * Wait till there are no more cmds outstanding at FW. Try for at most
3744 * 60 seconds
3745 */
3746 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3747 con_log(CL_DLEVEL1, (KERN_INFO
3748 "megaraid: FW has %d pending commands\n",
3749 adapter->outstanding_cmds));
3750
3751 msleep(1000);
3752 }
3753
3754 return adapter->outstanding_cmds;
3755}
3756
3757
3758/**
3759 * megaraid_mbox_mm_done - callback for CMM commands
3760 * @adapter : HBA soft state
3761 * @scb : completed command
3762 *
3763 * Callback routine for internal commands originated from the management
3764 * module.
3765 */
3766static void
3767megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3768{
3769 uioc_t *kioc;
3770 mbox64_t *mbox64;
3771 uint8_t *raw_mbox;
3772 unsigned long flags;
3773
3774 kioc = (uioc_t *)scb->gp;
1da177e4
LT		 3775 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3776 mbox64->mbox32.status = scb->status;
3777 raw_mbox = (uint8_t *)&mbox64->mbox32;
3778
3779
3780 // put scb in the free pool
3781 scb->state = SCB_FREE;
3782 scb->scp = NULL;
3783
3784 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3785
3786 list_add(&scb->list, &adapter->uscb_pool);
3787
3788 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3789
3790 // if a delete logical drive operation succeeded, restart the
3791 // controller
3792 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3793
3794 adapter->quiescent--;
3795
3796 megaraid_mbox_runpendq(adapter, NULL);
3797 }
3798
3799 kioc->done(kioc);
3800
3801 return;
3802}
3803
3804
3805/**
3806 * gather_hbainfo - HBA characteristics for the applications
3807 * @param adapter : HBA soft state
3808 * @param hinfo : pointer to the caller's host info strucuture
3809 */
3810static int
3811gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3812{
3813 uint8_t dmajor;
3814
3815 dmajor = megaraid_mbox_version[0];
3816
3817 hinfo->pci_vendor_id = adapter->pdev->vendor;
3818 hinfo->pci_device_id = adapter->pdev->device;
3819 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3820 hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3821
3822 hinfo->pci_bus = adapter->pdev->bus->number;
3823 hinfo->pci_dev_fn = adapter->pdev->devfn;
3824 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn);
3825 hinfo->irq = adapter->host->irq;
3826 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport;
3827
3828 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3829 hinfo->host_no = adapter->host->host_no;
3830
3831 return 0;
3832}
3833
3834/*
3835 * END: Interface for the common management module
3836 */
3837
3838
3839
3840/**
3841 * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3842 *
3843 * Allocate packets required to issue FW calls whenever the sysfs attributes
3844 * are read. These attributes would require up-to-date information from the
3845 * FW. Also set up resources for mutual exclusion to share these resources and
3846 * the wait queue.
3847 *
3848 * @param adapter : controller's soft state
3849 *
3850 * @return 0 on success
3851 * @return -ERROR_CODE on failure
3852 */
3853static int
3854megaraid_sysfs_alloc_resources(adapter_t *adapter)
3855{
3856 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3857 int rval = 0;
3858
3859 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3860
3861 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3862
3863 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3864 PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3865
3866 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3867 !raid_dev->sysfs_buffer) {
3868
3869 con_log(CL_ANN, (KERN_WARNING
3870 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3871 __LINE__));
3872
3873 rval = -ENOMEM;
3874
3875 megaraid_sysfs_free_resources(adapter);
3876 }
3877
3878 sema_init(&raid_dev->sysfs_sem, 1);
3879
3880 init_waitqueue_head(&raid_dev->sysfs_wait_q);
3881
3882 return rval;
3883}
3884
3885
3886/**
3887 * megaraid_sysfs_free_resources - free sysfs related resources
3888 *
3889 * Free packets allocated for sysfs FW commands
3890 *
3891 * @param adapter : controller's soft state
3892 */
3893static void
3894megaraid_sysfs_free_resources(adapter_t *adapter)
3895{
3896 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3897
c9475cb0
JJ		 3898 kfree(raid_dev->sysfs_uioc);
3899 kfree(raid_dev->sysfs_mbox64);
1da177e4
LT		 3900
3901 if (raid_dev->sysfs_buffer) {
3902 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3903 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3904 }
3905}
3906
3907
3908/**
3909 * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3910 *
3911 * Callback routine called in the ISR/tasklet context for get ldmap call
3912 *
3913 * @param uioc : completed packet
3914 */
3915static void
3916megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3917{
3918 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3919 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3920
3921 uioc->status = 0;
3922
3923 wake_up(&raid_dev->sysfs_wait_q);
3924}
3925
3926
3927/**
3928 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3929 *
3930 * Timeout routine to recover and return to application, in case the adapter
3931 * has stopped responding. A timeout of 60 seconds for this command seem like
3932 * a good value
3933 *
3934 * @param uioc : timed out packet
3935 */
3936static void
3937megaraid_sysfs_get_ldmap_timeout(unsigned long data)
3938{
3939 uioc_t *uioc = (uioc_t *)data;
3940 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3941 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3942
3943 uioc->status = -ETIME;
3944
3945 wake_up(&raid_dev->sysfs_wait_q);
3946}
3947
3948
3949/**
3950 * megaraid_sysfs_get_ldmap - get update logical drive map
3951 *
3952 * This routine will be called whenever user reads the logical drive
3953 * attributes, go get the current logical drive mapping table from the
3954 * firmware. We use the managment API's to issue commands to the controller.
3955 *
3956 * NOTE: The commands issuance functionality is not generalized and
3957 * implemented in context of "get ld map" command only. If required, the
3958 * command issuance logical can be trivially pulled out and implemented as a
3959 * standalone libary. For now, this should suffice since there is no other
3960 * user of this interface.
3961 *
3962 * @param adapter : controller's soft state
3963 *
3964 * @return 0 on success
3965 * @return -1 on failure
3966 */
3967static int
3968megaraid_sysfs_get_ldmap(adapter_t *adapter)
3969{
3970 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3971 uioc_t *uioc;
3972 mbox64_t *mbox64;
3973 mbox_t *mbox;
3974 char *raw_mbox;
3975 struct timer_list sysfs_timer;
3976 struct timer_list *timerp;
3977 caddr_t ldmap;
3978 int rval = 0;
3979
3980 /*
3981 * Allow only one read at a time to go through the sysfs attributes
3982 */
3983 down(&raid_dev->sysfs_sem);
3984
3985 uioc = raid_dev->sysfs_uioc;
3986 mbox64 = raid_dev->sysfs_mbox64;
3987 ldmap = raid_dev->sysfs_buffer;
3988
3989 memset(uioc, 0, sizeof(uioc_t));
3990 memset(mbox64, 0, sizeof(mbox64_t));
3991 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
3992
3993 mbox = &mbox64->mbox32;
3994 raw_mbox = (char *)mbox;
3995 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64;
3996 uioc->buf_vaddr = (caddr_t)adapter;
3997 uioc->status = -ENODATA;
3998 uioc->done = megaraid_sysfs_get_ldmap_done;
3999
4000 /*
4001 * Prepare the mailbox packet to get the current logical drive mapping
4002 * table
4003 */
4004 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
4005
4006 raw_mbox[0] = FC_DEL_LOGDRV;
4007 raw_mbox[2] = OP_GET_LDID_MAP;
4008
4009 /*
4010 * Setup a timer to recover from a non-responding controller
4011 */
4012 timerp = &sysfs_timer;
4013 init_timer(timerp);
4014
4015 timerp->function = megaraid_sysfs_get_ldmap_timeout;
4016 timerp->data = (unsigned long)uioc;
4017 timerp->expires = jiffies + 60 * HZ;
4018
4019 add_timer(timerp);
4020
4021 /*
4022 * Send the command to the firmware
4023 */
4024 rval = megaraid_mbox_mm_command(adapter, uioc);
4025
4026 if (rval == 0) { // command successfully issued
4027 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4028
4029 /*
4030 * Check if the command timed out
4031 */
4032 if (uioc->status == -ETIME) {
4033 con_log(CL_ANN, (KERN_NOTICE
4034 "megaraid: sysfs get ld map timed out\n"));
4035
4036 rval = -ETIME;
4037 }
4038 else {
4039 rval = mbox->status;
4040 }
4041
4042 if (rval == 0) {
4043 memcpy(raid_dev->curr_ldmap, ldmap,
4044 sizeof(raid_dev->curr_ldmap));
4045 }
4046 else {
4047 con_log(CL_ANN, (KERN_NOTICE
4048 "megaraid: get ld map failed with %x\n", rval));
4049 }
4050 }
4051 else {
4052 con_log(CL_ANN, (KERN_NOTICE
4053 "megaraid: could not issue ldmap command:%x\n", rval));
4054 }
4055
4056
4057 del_timer_sync(timerp);
4058
4059 up(&raid_dev->sysfs_sem);
4060
4061 return rval;
4062}
4063
4064
4065/**
4066 * megaraid_sysfs_show_app_hndl - display application handle for this adapter
4067 *
4068 * Display the handle used by the applications while executing management
4069 * tasks on the adapter. We invoke a management module API to get the adapter
4070 * handle, since we do not interface with applications directly.
4071 *
4072 * @param cdev : class device object representation for the host
4073 * @param buf : buffer to send data to
4074 */
4075static ssize_t
4076megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf)
4077{
4078 struct Scsi_Host *shost = class_to_shost(cdev);
4079 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4080 uint32_t app_hndl;
4081
4082 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4083
4084 return snprintf(buf, 8, "%u\n", app_hndl);
4085}
4086
4087
4088/**
4089 * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4090 *
4091 * Display the logical drive number for the device in question, if it a valid
4092 * logical drive. For physical devices, "-1" is returned
4093 * The logical drive number is displayed in following format
4094 *
4095 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4096 * <int> <int> <int> <int>
4097 *
4098 * @param dev : device object representation for the scsi device
4099 * @param buf : buffer to send data to
4100 */
4101static ssize_t
10523b3b 4102megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 4103{
4104 struct scsi_device *sdev = to_scsi_device(dev);
4105 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4106 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4107 int scsi_id = -1;
4108 int logical_drv = -1;
4109 int ldid_map = -1;
4110 uint32_t app_hndl = 0;
4111 int mapped_sdev_id;
4112 int rval;
4113 int i;
4114
4115 if (raid_dev->random_del_supported &&
4116 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4117
4118 rval = megaraid_sysfs_get_ldmap(adapter);
4119 if (rval == 0) {
4120
4121 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4122
4123 mapped_sdev_id = sdev->id;
4124
4125 if (sdev->id > adapter->init_id) {
4126 mapped_sdev_id -= 1;
4127 }
4128
4129 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4130
4131 scsi_id = sdev->id;
4132
4133 logical_drv = i;
4134
4135 ldid_map = raid_dev->curr_ldmap[i];
4136
4137 app_hndl = mraid_mm_adapter_app_handle(
4138 adapter->unique_id);
4139
4140 break;
4141 }
4142 }
4143 }
4144 else {
4145 con_log(CL_ANN, (KERN_NOTICE
4146 "megaraid: sysfs get ld map failed: %x\n",
4147 rval));
4148 }
4149 }
4150
4151 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4152 ldid_map, app_hndl);
4153}
4154
4155
4156/*
4157 * END: Mailbox Low Level Driver
4158 */
4159module_init(megaraid_init);
4160module_exit(megaraid_exit);
4161
4162/* vim: set ts=8 sw=8 tw=78 ai si: */
kernel source for telekom puls (alcatel/mediatek)