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[SCSI] megaraid_{mm,mbox}: init fix for kdump
[net-next-2.6.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
cd96d96f 13 * Version : v2.20.5.1 (Nov 16 2006)
1da177e4
LT		 14 *
15 * Authors:
cd96d96f
SP		 16 * Atul Mukker <Atul.Mukker@lsi.com>
17 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com>
18 * Manoj Jose <Manoj.Jose@lsi.com>
19 * Seokmann Ju
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 *);
cd96d96f 110static int megaraid_mbox_fire_sync_cmd(adapter_t *);
1da177e4
LT		 111
112static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
113static void megaraid_mbox_setup_device_map(adapter_t *);
114
115static int megaraid_queue_command(struct scsi_cmnd *,
116 void (*)(struct scsi_cmnd *));
117static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
118static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
119static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
120 struct scsi_cmnd *);
121static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
122 struct scsi_cmnd *);
123
7d12e780 124static irqreturn_t megaraid_isr(int, void *);
1da177e4
LT		 125
126static void megaraid_mbox_dpc(unsigned long);
127
128static ssize_t megaraid_sysfs_show_app_hndl(struct class_device *, char *);
10523b3b 129static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *);
1da177e4
LT		 130
131static int megaraid_cmm_register(adapter_t *);
132static int megaraid_cmm_unregister(adapter_t *);
133static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
134static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
135static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
136static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
137static int wait_till_fw_empty(adapter_t *);
138
139
140
cd96d96f 141MODULE_AUTHOR("megaraidlinux@lsi.com");
1da177e4
LT		 142MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
143MODULE_LICENSE("GPL");
144MODULE_VERSION(MEGARAID_VERSION);
145
146/*
147 * ### modules parameters for driver ###
148 */
149
150/**
151 * Set to enable driver to expose unconfigured disk to kernel
152 */
153static int megaraid_expose_unconf_disks = 0;
154module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
155MODULE_PARM_DESC(unconf_disks,
156 "Set to expose unconfigured disks to kernel (default=0)");
157
158/**
159 * driver wait time if the adapter's mailbox is busy
160 */
161static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
162module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
163MODULE_PARM_DESC(busy_wait,
164 "Max wait for mailbox in microseconds if busy (default=10)");
165
166/**
167 * number of sectors per IO command
168 */
169static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
170module_param_named(max_sectors, megaraid_max_sectors, int, 0);
171MODULE_PARM_DESC(max_sectors,
172 "Maximum number of sectors per IO command (default=128)");
173
174/**
175 * number of commands per logical unit
176 */
177static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
178module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
179MODULE_PARM_DESC(cmd_per_lun,
180 "Maximum number of commands per logical unit (default=64)");
181
182
183/**
184 * Fast driver load option, skip scanning for physical devices during load.
185 * This would result in non-disk devices being skipped during driver load
186 * time. These can be later added though, using /proc/scsi/scsi
187 */
188static unsigned int megaraid_fast_load = 0;
189module_param_named(fast_load, megaraid_fast_load, int, 0);
190MODULE_PARM_DESC(fast_load,
191 "Faster loading of the driver, skips physical devices! (default=0)");
192
193
194/**
195 * mraid_debug level - threshold for amount of information to be displayed by
196 * the driver. This level can be changed through modules parameters, ioctl or
197 * sysfs/proc interface. By default, print the announcement messages only.
198 */
199int mraid_debug_level = CL_ANN;
200module_param_named(debug_level, mraid_debug_level, int, 0);
201MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
202
203/*
204 * ### global data ###
205 */
206static uint8_t megaraid_mbox_version[8] =
672b2d38 207 { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 };
1da177e4
LT		 208
209
210/*
211 * PCI table for all supported controllers.
212 */
213static struct pci_device_id pci_id_table_g[] = {
214 {
215 PCI_VENDOR_ID_DELL,
216 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
217 PCI_VENDOR_ID_DELL,
218 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
219 },
220 {
221 PCI_VENDOR_ID_LSI_LOGIC,
222 PCI_DEVICE_ID_PERC4_SC,
223 PCI_VENDOR_ID_DELL,
224 PCI_SUBSYS_ID_PERC4_SC,
225 },
226 {
227 PCI_VENDOR_ID_LSI_LOGIC,
228 PCI_DEVICE_ID_PERC4_DC,
229 PCI_VENDOR_ID_DELL,
230 PCI_SUBSYS_ID_PERC4_DC,
231 },
232 {
233 PCI_VENDOR_ID_LSI_LOGIC,
672b2d38
JS		 234 PCI_DEVICE_ID_VERDE,
235 PCI_ANY_ID,
236 PCI_ANY_ID,
1da177e4
LT		 237 },
238 {
239 PCI_VENDOR_ID_DELL,
240 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
241 PCI_VENDOR_ID_DELL,
242 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
243 },
244 {
245 PCI_VENDOR_ID_DELL,
246 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
247 PCI_VENDOR_ID_DELL,
248 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
249 },
250 {
251 PCI_VENDOR_ID_DELL,
252 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
253 PCI_VENDOR_ID_DELL,
254 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
255 },
256 {
257 PCI_VENDOR_ID_DELL,
258 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
259 PCI_VENDOR_ID_DELL,
260 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
261 },
262 {
263 PCI_VENDOR_ID_DELL,
264 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
265 PCI_VENDOR_ID_DELL,
266 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
267 },
268 {
269 PCI_VENDOR_ID_DELL,
270 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
271 PCI_VENDOR_ID_DELL,
272 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
273 },
274 {
275 PCI_VENDOR_ID_LSI_LOGIC,
672b2d38
JS		 276 PCI_DEVICE_ID_DOBSON,
277 PCI_ANY_ID,
278 PCI_ANY_ID,
1da177e4
LT		 279 },
280 {
281 PCI_VENDOR_ID_AMI,
282 PCI_DEVICE_ID_AMI_MEGARAID3,
ed7e8ef7
JS		 283 PCI_ANY_ID,
284 PCI_ANY_ID,
1da177e4
LT		 285 },
286 {
287 PCI_VENDOR_ID_LSI_LOGIC,
ed7e8ef7
JS		 288 PCI_DEVICE_ID_AMI_MEGARAID3,
289 PCI_ANY_ID,
290 PCI_ANY_ID,
1da177e4
LT		 291 },
292 {
293 PCI_VENDOR_ID_LSI_LOGIC,
672b2d38
JS		 294 PCI_DEVICE_ID_LINDSAY,
295 PCI_ANY_ID,
296 PCI_ANY_ID,
1da177e4 297 },
1da177e4
LT		 298 {0} /* Terminating entry */
299};
300MODULE_DEVICE_TABLE(pci, pci_id_table_g);
301
302
303static struct pci_driver megaraid_pci_driver_g = {
304 .name = "megaraid",
305 .id_table = pci_id_table_g,
306 .probe = megaraid_probe_one,
307 .remove = __devexit_p(megaraid_detach_one),
5457b6a6 308 .shutdown = megaraid_mbox_shutdown,
1da177e4
LT		 309};
310
311
312
313// definitions for the device attributes for exporting logical drive number
314// for a scsi address (Host, Channel, Id, Lun)
315
316CLASS_DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
317 NULL);
318
319// Host template initializer for megaraid mbox sysfs device attributes
320static struct class_device_attribute *megaraid_shost_attrs[] = {
321 &class_device_attr_megaraid_mbox_app_hndl,
322 NULL,
323};
324
325
326DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
327
328// Host template initializer for megaraid mbox sysfs device attributes
329static struct device_attribute *megaraid_sdev_attrs[] = {
330 &dev_attr_megaraid_mbox_ld,
331 NULL,
332};
333
f4c8aa11 334/**
335 * megaraid_change_queue_depth - Change the device's queue depth
336 * @sdev: scsi device struct
337 * @qdepth: depth to set
338 *
339 * Return value:
340 * actual depth set
341 **/
342static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth)
343{
344 if (qdepth > MBOX_MAX_SCSI_CMDS)
345 qdepth = MBOX_MAX_SCSI_CMDS;
346 scsi_adjust_queue_depth(sdev, 0, qdepth);
347 return sdev->queue_depth;
348}
1da177e4
LT		 349
350/*
351 * Scsi host template for megaraid unified driver
352 */
353static struct scsi_host_template megaraid_template_g = {
354 .module = THIS_MODULE,
355 .name = "LSI Logic MegaRAID driver",
356 .proc_name = "megaraid",
357 .queuecommand = megaraid_queue_command,
358 .eh_abort_handler = megaraid_abort_handler,
359 .eh_device_reset_handler = megaraid_reset_handler,
360 .eh_bus_reset_handler = megaraid_reset_handler,
361 .eh_host_reset_handler = megaraid_reset_handler,
f4c8aa11 362 .change_queue_depth = megaraid_change_queue_depth,
1da177e4
LT		 363 .use_clustering = ENABLE_CLUSTERING,
364 .sdev_attrs = megaraid_sdev_attrs,
365 .shost_attrs = megaraid_shost_attrs,
366};
367
368
369/**
370 * megaraid_init - module load hook
371 *
372 * We register ourselves as hotplug enabled module and let PCI subsystem
373 * discover our adaters
374 **/
375static int __init
376megaraid_init(void)
377{
378 int rval;
379
380 // Announce the driver version
381 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
382 MEGARAID_EXT_VERSION));
383
384 // check validity of module parameters
385 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
386
387 con_log(CL_ANN, (KERN_WARNING
388 "megaraid mailbox: max commands per lun reset to %d\n",
389 MBOX_MAX_SCSI_CMDS));
390
391 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
392 }
393
394
395 // register as a PCI hot-plug driver module
672b2d38
JS		 396 rval = pci_register_driver(&megaraid_pci_driver_g);
397 if (rval < 0) {
1da177e4
LT		 398 con_log(CL_ANN, (KERN_WARNING
399 "megaraid: could not register hotplug support.\n"));
400 }
401
402 return rval;
403}
404
405
406/**
407 * megaraid_exit - driver unload entry point
408 *
409 * We simply unwrap the megaraid_init routine here
410 */
411static void __exit
412megaraid_exit(void)
413{
414 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
415
416 // unregister as PCI hotplug driver
417 pci_unregister_driver(&megaraid_pci_driver_g);
418
419 return;
420}
421
422
423/**
424 * megaraid_probe_one - PCI hotplug entry point
425 * @param pdev : handle to this controller's PCI configuration space
426 * @param id : pci device id of the class of controllers
427 *
428 * This routine should be called whenever a new adapter is detected by the
429 * PCI hotplug susbsytem.
430 **/
431static int __devinit
432megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
433{
434 adapter_t *adapter;
435
436
437 // detected a new controller
438 con_log(CL_ANN, (KERN_INFO
439 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
440 pdev->vendor, pdev->device, pdev->subsystem_vendor,
441 pdev->subsystem_device));
442
443 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
444 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
445
446 if (pci_enable_device(pdev)) {
447 con_log(CL_ANN, (KERN_WARNING
448 "megaraid: pci_enable_device failed\n"));
449
450 return -ENODEV;
451 }
452
453 // Enable bus-mastering on this controller
454 pci_set_master(pdev);
455
456 // Allocate the per driver initialization structure
457 adapter = kmalloc(sizeof(adapter_t), GFP_KERNEL);
458
459 if (adapter == NULL) {
460 con_log(CL_ANN, (KERN_WARNING
461 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__));
462
463 goto out_probe_one;
464 }
465 memset(adapter, 0, sizeof(adapter_t));
466
467
468 // set up PCI related soft state and other pre-known parameters
469 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn;
470 adapter->irq = pdev->irq;
471 adapter->pdev = pdev;
472
473 atomic_set(&adapter->being_detached, 0);
474
475 // Setup the default DMA mask. This would be changed later on
476 // depending on hardware capabilities
672b2d38 477 if (pci_set_dma_mask(adapter->pdev, DMA_32BIT_MASK) != 0) {
1da177e4
LT		 478
479 con_log(CL_ANN, (KERN_WARNING
480 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
481
482 goto out_free_adapter;
483 }
484
485
486 // Initialize the synchronization lock for kernel and LLD
487 spin_lock_init(&adapter->lock);
1da177e4
LT		 488
489 // Initialize the command queues: the list of free SCBs and the list
490 // of pending SCBs.
491 INIT_LIST_HEAD(&adapter->kscb_pool);
492 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
493
494 INIT_LIST_HEAD(&adapter->pend_list);
495 spin_lock_init(PENDING_LIST_LOCK(adapter));
496
497 INIT_LIST_HEAD(&adapter->completed_list);
498 spin_lock_init(COMPLETED_LIST_LOCK(adapter));
499
500
501 // Start the mailbox based controller
502 if (megaraid_init_mbox(adapter) != 0) {
503 con_log(CL_ANN, (KERN_WARNING
504 "megaraid: maibox adapter did not initialize\n"));
505
506 goto out_free_adapter;
507 }
508
509 // Register with LSI Common Management Module
510 if (megaraid_cmm_register(adapter) != 0) {
511
512 con_log(CL_ANN, (KERN_WARNING
513 "megaraid: could not register with management module\n"));
514
515 goto out_fini_mbox;
516 }
517
518 // setup adapter handle in PCI soft state
519 pci_set_drvdata(pdev, adapter);
520
521 // attach with scsi mid-layer
522 if (megaraid_io_attach(adapter) != 0) {
523
524 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
525
526 goto out_cmm_unreg;
527 }
528
529 return 0;
530
531out_cmm_unreg:
532 pci_set_drvdata(pdev, NULL);
533 megaraid_cmm_unregister(adapter);
534out_fini_mbox:
535 megaraid_fini_mbox(adapter);
536out_free_adapter:
537 kfree(adapter);
538out_probe_one:
539 pci_disable_device(pdev);
540
541 return -ENODEV;
542}
543
544
545/**
546 * megaraid_detach_one - release the framework resources and call LLD release
547 * routine
548 * @param pdev : handle for our PCI cofiguration space
549 *
550 * This routine is called during driver unload. We free all the allocated
551 * resources and call the corresponding LLD so that it can also release all
552 * its resources.
553 *
554 * This routine is also called from the PCI hotplug system
555 **/
556static void
557megaraid_detach_one(struct pci_dev *pdev)
558{
559 adapter_t *adapter;
560 struct Scsi_Host *host;
561
562
563 // Start a rollback on this adapter
564 adapter = pci_get_drvdata(pdev);
565
566 if (!adapter) {
567 con_log(CL_ANN, (KERN_CRIT
568 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
569 pdev->vendor, pdev->device, pdev->subsystem_vendor,
570 pdev->subsystem_device));
571
572 return;
573 }
574 else {
575 con_log(CL_ANN, (KERN_NOTICE
576 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
577 pdev->vendor, pdev->device, pdev->subsystem_vendor,
578 pdev->subsystem_device));
579 }
580
581
582 host = adapter->host;
583
584 // do not allow any more requests from the management module for this
585 // adapter.
586 // FIXME: How do we account for the request which might still be
587 // pending with us?
588 atomic_set(&adapter->being_detached, 1);
589
590 // detach from the IO sub-system
591 megaraid_io_detach(adapter);
592
593 // reset the device state in the PCI structure. We check this
594 // condition when we enter here. If the device state is NULL,
595 // that would mean the device has already been removed
596 pci_set_drvdata(pdev, NULL);
597
598 // Unregister from common management module
599 //
600 // FIXME: this must return success or failure for conditions if there
601 // is a command pending with LLD or not.
602 megaraid_cmm_unregister(adapter);
603
604 // finalize the mailbox based controller and release all resources
605 megaraid_fini_mbox(adapter);
606
607 kfree(adapter);
608
609 scsi_host_put(host);
610
611 pci_disable_device(pdev);
612
613 return;
614}
615
616
617/**
618 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
619 * @param device : generice driver model device
620 *
621 * Shutdown notification, perform flush cache
622 */
623static void
5457b6a6 624megaraid_mbox_shutdown(struct pci_dev *pdev)
1da177e4 625{
5457b6a6 626 adapter_t *adapter = pci_get_drvdata(pdev);
1da177e4
LT		 627 static int counter;
628
629 if (!adapter) {
630 con_log(CL_ANN, (KERN_WARNING
631 "megaraid: null device in shutdown\n"));
632 return;
633 }
634
635 // flush caches now
636 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
637 counter++));
638
639 megaraid_mbox_flush_cache(adapter);
640
641 con_log(CL_ANN, ("done\n"));
642}
643
644
645/**
646 * megaraid_io_attach - attach a device with the IO subsystem
647 * @param adapter : controller's soft state
648 *
649 * Attach this device with the IO subsystem
650 **/
651static int
652megaraid_io_attach(adapter_t *adapter)
653{
654 struct Scsi_Host *host;
655
656 // Initialize SCSI Host structure
657 host = scsi_host_alloc(&megaraid_template_g, 8);
658 if (!host) {
659 con_log(CL_ANN, (KERN_WARNING
660 "megaraid mbox: scsi_register failed\n"));
661
662 return -1;
663 }
664
665 SCSIHOST2ADAP(host) = (caddr_t)adapter;
666 adapter->host = host;
667
1da177e4
LT		 668 host->irq = adapter->irq;
669 host->unique_id = adapter->unique_id;
670 host->can_queue = adapter->max_cmds;
671 host->this_id = adapter->init_id;
672 host->sg_tablesize = adapter->sglen;
673 host->max_sectors = adapter->max_sectors;
674 host->cmd_per_lun = adapter->cmd_per_lun;
675 host->max_channel = adapter->max_channel;
676 host->max_id = adapter->max_target;
677 host->max_lun = adapter->max_lun;
678
679
680 // notify mid-layer about the new controller
681 if (scsi_add_host(host, &adapter->pdev->dev)) {
682
683 con_log(CL_ANN, (KERN_WARNING
684 "megaraid mbox: scsi_add_host failed\n"));
685
686 scsi_host_put(host);
687
688 return -1;
689 }
690
691 scsi_scan_host(host);
692
693 return 0;
694}
695
696
697/**
698 * megaraid_io_detach - detach a device from the IO subsystem
699 * @param adapter : controller's soft state
700 *
701 * Detach this device from the IO subsystem
702 **/
703static void
704megaraid_io_detach(adapter_t *adapter)
705{
706 struct Scsi_Host *host;
707
708 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
709
710 host = adapter->host;
711
712 scsi_remove_host(host);
713
714 return;
715}
716
717
718/*
719 * START: Mailbox Low Level Driver
720 *
721 * This is section specific to the single mailbox based controllers
722 */
723
724/**
725 * megaraid_init_mbox - initialize controller
726 * @param adapter - our soft state
727 *
728 * . Allocate 16-byte aligned mailbox memory for firmware handshake
729 * . Allocate controller's memory resources
730 * . Find out all initialization data
731 * . Allocate memory required for all the commands
732 * . Use internal library of FW routines, build up complete soft state
733 */
cedfb178 734static int __devinit
1da177e4
LT		 735megaraid_init_mbox(adapter_t *adapter)
736{
737 struct pci_dev *pdev;
738 mraid_device_t *raid_dev;
739 int i;
fbf60802 740 uint32_t magic64;
1da177e4
LT		 741
742
743 adapter->ito = MBOX_TIMEOUT;
744 pdev = adapter->pdev;
745
746 /*
747 * Allocate and initialize the init data structure for mailbox
748 * controllers
749 */
750 raid_dev = kmalloc(sizeof(mraid_device_t), GFP_KERNEL);
751 if (raid_dev == NULL) return -1;
752
753 memset(raid_dev, 0, sizeof(mraid_device_t));
754
755 /*
756 * Attach the adapter soft state to raid device soft state
757 */
758 adapter->raid_device = (caddr_t)raid_dev;
759 raid_dev->fast_load = megaraid_fast_load;
760
761
762 // our baseport
763 raid_dev->baseport = pci_resource_start(pdev, 0);
764
765 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
766
767 con_log(CL_ANN, (KERN_WARNING
768 "megaraid: mem region busy\n"));
769
770 goto out_free_raid_dev;
771 }
772
773 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
774
775 if (!raid_dev->baseaddr) {
776
777 con_log(CL_ANN, (KERN_WARNING
778 "megaraid: could not map hba memory\n") );
779
780 goto out_release_regions;
781 }
782
cd96d96f
SP		 783 /* initialize the mutual exclusion lock for the mailbox */
784 spin_lock_init(&raid_dev->mailbox_lock);
785
786 /* allocate memory required for commands */
787 if (megaraid_alloc_cmd_packets(adapter) != 0)
788 goto out_iounmap;
1da177e4 789
cd96d96f
SP		 790 /*
791 * Issue SYNC cmd to flush the pending cmds in the adapter
792 * and initialize its internal state
793 */
794
795 if (megaraid_mbox_fire_sync_cmd(adapter))
796 con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
797
798 /*
799 * Setup the rest of the soft state using the library of
800 * FW routines
801 */
802
803 /* request IRQ and register the interrupt service routine */
1d6f359a 804 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
1da177e4
LT		 805 adapter)) {
806
807 con_log(CL_ANN, (KERN_WARNING
808 "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
cd96d96f 809 goto out_alloc_cmds;
1da177e4 810
1da177e4
LT		 811 }
812
813 // Product info
cd96d96f
SP		 814 if (megaraid_mbox_product_info(adapter) != 0)
815 goto out_free_irq;
1da177e4
LT		 816
817 // Do we support extended CDBs
818 adapter->max_cdb_sz = 10;
819 if (megaraid_mbox_extended_cdb(adapter) == 0) {
820 adapter->max_cdb_sz = 16;
821 }
822
823 /*
824 * Do we support cluster environment, if we do, what is the initiator
825 * id.
826 * NOTE: In a non-cluster aware firmware environment, the LLD should
827 * return 7 as initiator id.
828 */
829 adapter->ha = 0;
830 adapter->init_id = -1;
831 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
832 adapter->ha = 1;
833 }
834
835 /*
836 * Prepare the device ids array to have the mapping between the kernel
837 * device address and megaraid device address.
838 * We export the physical devices on their actual addresses. The
839 * logical drives are exported on a virtual SCSI channel
840 */
841 megaraid_mbox_setup_device_map(adapter);
842
843 // If the firmware supports random deletion, update the device id map
844 if (megaraid_mbox_support_random_del(adapter)) {
845
846 // Change the logical drives numbers in device_ids array one
847 // slot in device_ids is reserved for target id, that's why
848 // "<=" below
849 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
850 adapter->device_ids[adapter->max_channel][i] += 0x80;
851 }
852 adapter->device_ids[adapter->max_channel][adapter->init_id] =
853 0xFF;
854
855 raid_dev->random_del_supported = 1;
856 }
857
858 /*
859 * find out the maximum number of scatter-gather elements supported by
860 * this firmware
861 */
862 adapter->sglen = megaraid_mbox_get_max_sg(adapter);
863
864 // enumerate RAID and SCSI channels so that all devices on SCSI
865 // channels can later be exported, including disk devices
866 megaraid_mbox_enum_raid_scsi(adapter);
867
868 /*
869 * Other parameters required by upper layer
870 *
871 * maximum number of sectors per IO command
872 */
873 adapter->max_sectors = megaraid_max_sectors;
874
875 /*
876 * number of queued commands per LUN.
877 */
878 adapter->cmd_per_lun = megaraid_cmd_per_lun;
879
880 /*
881 * Allocate resources required to issue FW calls, when sysfs is
882 * accessed
883 */
cd96d96f
SP		 884 if (megaraid_sysfs_alloc_resources(adapter) != 0)
885 goto out_free_irq;
1da177e4
LT		 886
887 // Set the DMA mask to 64-bit. All supported controllers as capable of
888 // DMA in this range
fbf60802
JS		 889 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
890
891 if (((magic64 == HBA_SIGNATURE_64_BIT) &&
892 ((adapter->pdev->subsystem_device !=
8741ca71 893 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
fbf60802
JS		 894 (adapter->pdev->subsystem_device !=
895 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
896 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
897 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
898 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
899 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
900 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
901 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
902 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
903 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
904 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
905 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
906 if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK)) {
907 con_log(CL_ANN, (KERN_WARNING
908 "megaraid: DMA mask for 64-bit failed\n"));
909
910 if (pci_set_dma_mask (adapter->pdev, DMA_32BIT_MASK)) {
911 con_log(CL_ANN, (KERN_WARNING
912 "megaraid: 32-bit DMA mask failed\n"));
913 goto out_free_sysfs_res;
914 }
915 }
1da177e4
LT		 916 }
917
918 // setup tasklet for DPC
919 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
920 (unsigned long)adapter);
921
922 con_log(CL_DLEVEL1, (KERN_INFO
923 "megaraid mbox hba successfully initialized\n"));
924
925 return 0;
926
927out_free_sysfs_res:
928 megaraid_sysfs_free_resources(adapter);
1da177e4
LT		 929out_free_irq:
930 free_irq(adapter->irq, adapter);
cd96d96f
SP		 931out_alloc_cmds:
932 megaraid_free_cmd_packets(adapter);
1da177e4
LT		 933out_iounmap:
934 iounmap(raid_dev->baseaddr);
935out_release_regions:
936 pci_release_regions(pdev);
937out_free_raid_dev:
938 kfree(raid_dev);
939
940 return -1;
941}
942
943
944/**
945 * megaraid_fini_mbox - undo controller initialization
946 * @param adapter : our soft state
947 */
948static void
949megaraid_fini_mbox(adapter_t *adapter)
950{
951 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
952
953 // flush all caches
954 megaraid_mbox_flush_cache(adapter);
955
956 tasklet_kill(&adapter->dpc_h);
957
958 megaraid_sysfs_free_resources(adapter);
959
960 megaraid_free_cmd_packets(adapter);
961
962 free_irq(adapter->irq, adapter);
963
964 iounmap(raid_dev->baseaddr);
965
966 pci_release_regions(adapter->pdev);
967
968 kfree(raid_dev);
969
970 return;
971}
972
973
974/**
975 * megaraid_alloc_cmd_packets - allocate shared mailbox
976 * @param adapter : soft state of the raid controller
977 *
978 * Allocate and align the shared mailbox. This maibox is used to issue
979 * all the commands. For IO based controllers, the mailbox is also regsitered
980 * with the FW. Allocate memory for all commands as well.
981 * This is our big allocator
982 */
983static int
984megaraid_alloc_cmd_packets(adapter_t *adapter)
985{
986 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
987 struct pci_dev *pdev;
988 unsigned long align;
989 scb_t *scb;
990 mbox_ccb_t *ccb;
991 struct mraid_pci_blk *epthru_pci_blk;
992 struct mraid_pci_blk *sg_pci_blk;
993 struct mraid_pci_blk *mbox_pci_blk;
994 int i;
995
996 pdev = adapter->pdev;
997
998 /*
999 * Setup the mailbox
1000 * Allocate the common 16-byte aligned memory for the handshake
1001 * mailbox.
1002 */
1003 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
1004 sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
1005
1006 if (!raid_dev->una_mbox64) {
1007 con_log(CL_ANN, (KERN_WARNING
1008 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1009 __LINE__));
1010 return -1;
1011 }
1012 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
1013
1014 /*
1015 * Align the mailbox at 16-byte boundary
1016 */
1017 raid_dev->mbox = &raid_dev->una_mbox64->mbox32;
1018
1019 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
1020 (~0UL ^ 0xFUL));
1021
1022 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
1023
1024 align = ((void *)raid_dev->mbox -
1025 ((void *)&raid_dev->una_mbox64->mbox32));
1026
1027 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1028 align;
1029
1030 // Allocate memory for commands issued internally
1031 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
1032 &adapter->ibuf_dma_h);
1033 if (!adapter->ibuf) {
1034
1035 con_log(CL_ANN, (KERN_WARNING
1036 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1037 __LINE__));
1038
1039 goto out_free_common_mbox;
1040 }
1041 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
1042
1043 // Allocate memory for our SCSI Command Blocks and their associated
1044 // memory
1045
1046 /*
1047 * Allocate memory for the base list of scb. Later allocate memory for
1048 * CCBs and embedded components of each CCB and point the pointers in
1049 * scb to the allocated components
1050 * NOTE: The code to allocate SCB will be duplicated in all the LLD
1051 * since the calling routine does not yet know the number of available
1052 * commands.
1053 */
1054 adapter->kscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_SCSI_CMDS,
1055 GFP_KERNEL);
1056
1057 if (adapter->kscb_list == NULL) {
1058 con_log(CL_ANN, (KERN_WARNING
1059 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1060 __LINE__));
1061 goto out_free_ibuf;
1062 }
1063 memset(adapter->kscb_list, 0, sizeof(scb_t) * MBOX_MAX_SCSI_CMDS);
1064
1065 // memory allocation for our command packets
1066 if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1067 con_log(CL_ANN, (KERN_WARNING
1068 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1069 __LINE__));
1070 goto out_free_scb_list;
1071 }
1072
1073 // Adjust the scb pointers and link in the free pool
1074 epthru_pci_blk = raid_dev->epthru_pool;
1075 sg_pci_blk = raid_dev->sg_pool;
1076 mbox_pci_blk = raid_dev->mbox_pool;
1077
1078 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1079 scb = adapter->kscb_list + i;
1080 ccb = raid_dev->ccb_list + i;
1081
1082 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1083 ccb->raw_mbox = (uint8_t *)ccb->mbox;
1084 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1085 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1086
1087 // make sure the mailbox is aligned properly
1088 if (ccb->mbox_dma_h & 0x0F) {
1089 con_log(CL_ANN, (KERN_CRIT
1090 "megaraid mbox: not aligned on 16-bytes\n"));
1091
1092 goto out_teardown_dma_pools;
1093 }
1094
1095 ccb->epthru = (mraid_epassthru_t *)
1096 epthru_pci_blk[i].vaddr;
1097 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr;
1098 ccb->pthru = (mraid_passthru_t *)ccb->epthru;
1099 ccb->pthru_dma_h = ccb->epthru_dma_h;
1100
1101
1102 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1103 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr;
1104 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64;
1105
1106 scb->ccb = (caddr_t)ccb;
1107 scb->gp = 0;
1108
1109 scb->sno = i; // command index
1110
1111 scb->scp = NULL;
1112 scb->state = SCB_FREE;
1113 scb->dma_direction = PCI_DMA_NONE;
1114 scb->dma_type = MRAID_DMA_NONE;
1115 scb->dev_channel = -1;
1116 scb->dev_target = -1;
1117
1118 // put scb in the free pool
1119 list_add_tail(&scb->list, &adapter->kscb_pool);
1120 }
1121
1122 return 0;
1123
1124out_teardown_dma_pools:
1125 megaraid_mbox_teardown_dma_pools(adapter);
1126out_free_scb_list:
1127 kfree(adapter->kscb_list);
1128out_free_ibuf:
1129 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1130 adapter->ibuf_dma_h);
1131out_free_common_mbox:
1132 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1133 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1134
1135 return -1;
1136}
1137
1138
1139/**
1140 * megaraid_free_cmd_packets - free memory
1141 * @param adapter : soft state of the raid controller
1142 *
1143 * Release memory resources allocated for commands
1144 */
1145static void
1146megaraid_free_cmd_packets(adapter_t *adapter)
1147{
1148 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1149
1150 megaraid_mbox_teardown_dma_pools(adapter);
1151
1152 kfree(adapter->kscb_list);
1153
1154 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1155 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1156
1157 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1158 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1159 return;
1160}
1161
1162
1163/**
1164 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1165 * @param adapter : HBA soft state
1166 *
1167 * setup the dma pools for mailbox, passthru and extended passthru structures,
1168 * and scatter-gather lists
1169 */
1170static int
1171megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1172{
1173 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1174 struct mraid_pci_blk *epthru_pci_blk;
1175 struct mraid_pci_blk *sg_pci_blk;
1176 struct mraid_pci_blk *mbox_pci_blk;
1177 int i;
1178
1179
1180
1181 // Allocate memory for 16-bytes aligned mailboxes
1182 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1183 adapter->pdev,
1184 sizeof(mbox64_t) + 16,
1185 16, 0);
1186
1187 if (raid_dev->mbox_pool_handle == NULL) {
1188 goto fail_setup_dma_pool;
1189 }
1190
1191 mbox_pci_blk = raid_dev->mbox_pool;
1192 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1193 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1194 raid_dev->mbox_pool_handle,
1195 GFP_KERNEL,
1196 &mbox_pci_blk[i].dma_addr);
1197 if (!mbox_pci_blk[i].vaddr) {
1198 goto fail_setup_dma_pool;
1199 }
1200 }
1201
1202 /*
1203 * Allocate memory for each embedded passthru strucuture pointer
1204 * Request for a 128 bytes aligned structure for each passthru command
1205 * structure
1206 * Since passthru and extended passthru commands are exclusive, they
1207 * share common memory pool. Passthru structures piggyback on memory
1208 * allocted to extended passthru since passthru is smaller of the two
1209 */
1210 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1211 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1212
1213 if (raid_dev->epthru_pool_handle == NULL) {
1214 goto fail_setup_dma_pool;
1215 }
1216
1217 epthru_pci_blk = raid_dev->epthru_pool;
1218 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1219 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1220 raid_dev->epthru_pool_handle,
1221 GFP_KERNEL,
1222 &epthru_pci_blk[i].dma_addr);
1223 if (!epthru_pci_blk[i].vaddr) {
1224 goto fail_setup_dma_pool;
1225 }
1226 }
1227
1228
1229 // Allocate memory for each scatter-gather list. Request for 512 bytes
1230 // alignment for each sg list
1231 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1232 adapter->pdev,
1233 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1234 512, 0);
1235
1236 if (raid_dev->sg_pool_handle == NULL) {
1237 goto fail_setup_dma_pool;
1238 }
1239
1240 sg_pci_blk = raid_dev->sg_pool;
1241 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1242 sg_pci_blk[i].vaddr = pci_pool_alloc(
1243 raid_dev->sg_pool_handle,
1244 GFP_KERNEL,
1245 &sg_pci_blk[i].dma_addr);
1246 if (!sg_pci_blk[i].vaddr) {
1247 goto fail_setup_dma_pool;
1248 }
1249 }
1250
1251 return 0;
1252
1253fail_setup_dma_pool:
1254 megaraid_mbox_teardown_dma_pools(adapter);
1255 return -1;
1256}
1257
1258
1259/**
1260 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1261 * @param adapter : HBA soft state
1262 *
1263 * teardown the dma pool for mailbox, passthru and extended passthru
1264 * structures, and scatter-gather lists
1265 */
1266static void
1267megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1268{
1269 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1270 struct mraid_pci_blk *epthru_pci_blk;
1271 struct mraid_pci_blk *sg_pci_blk;
1272 struct mraid_pci_blk *mbox_pci_blk;
1273 int i;
1274
1275
1276 sg_pci_blk = raid_dev->sg_pool;
1277 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1278 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1279 sg_pci_blk[i].dma_addr);
1280 }
1281 if (raid_dev->sg_pool_handle)
1282 pci_pool_destroy(raid_dev->sg_pool_handle);
1283
1284
1285 epthru_pci_blk = raid_dev->epthru_pool;
1286 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1287 pci_pool_free(raid_dev->epthru_pool_handle,
1288 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1289 }
1290 if (raid_dev->epthru_pool_handle)
1291 pci_pool_destroy(raid_dev->epthru_pool_handle);
1292
1293
1294 mbox_pci_blk = raid_dev->mbox_pool;
1295 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1296 pci_pool_free(raid_dev->mbox_pool_handle,
1297 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1298 }
1299 if (raid_dev->mbox_pool_handle)
1300 pci_pool_destroy(raid_dev->mbox_pool_handle);
1301
1302 return;
1303}
1304
1305
1306/**
1307 * megaraid_alloc_scb - detach and return a scb from the free list
1308 * @adapter : controller's soft state
1309 *
1310 * return the scb from the head of the free list. NULL if there are none
1311 * available
1312 **/
858119e1 1313static scb_t *
1da177e4
LT		 1314megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1315{
1316 struct list_head *head = &adapter->kscb_pool;
1317 scb_t *scb = NULL;
1318 unsigned long flags;
1319
1320 // detach scb from free pool
1321 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1322
1323 if (list_empty(head)) {
1324 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1325 return NULL;
1326 }
1327
1328 scb = list_entry(head->next, scb_t, list);
1329 list_del_init(&scb->list);
1330
1331 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1332
1333 scb->state = SCB_ACTIVE;
1334 scb->scp = scp;
1335 scb->dma_type = MRAID_DMA_NONE;
1336
1337 return scb;
1338}
1339
1340
1341/**
1342 * megaraid_dealloc_scb - return the scb to the free pool
1343 * @adapter : controller's soft state
1344 * @scb : scb to be freed
1345 *
1346 * return the scb back to the free list of scbs. The caller must 'flush' the
1347 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1348 * NOTE NOTE: Make sure the scb is not on any list before calling this
1349 * routine.
1350 **/
1351static inline void
1352megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1353{
1354 unsigned long flags;
1355
1356 // put scb in the free pool
1357 scb->state = SCB_FREE;
1358 scb->scp = NULL;
1359 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1360
1361 list_add(&scb->list, &adapter->kscb_pool);
1362
1363 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1364
1365 return;
1366}
1367
1368
1369/**
1370 * megaraid_mbox_mksgl - make the scatter-gather list
1371 * @adapter - controller's soft state
1372 * @scb - scsi control block
1373 *
1374 * prepare the scatter-gather list
1375 */
858119e1 1376static int
1da177e4
LT		 1377megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1378{
1379 struct scatterlist *sgl;
1380 mbox_ccb_t *ccb;
1381 struct page *page;
1382 unsigned long offset;
1383 struct scsi_cmnd *scp;
1384 int sgcnt;
1385 int i;
1386
1387
1388 scp = scb->scp;
1389 ccb = (mbox_ccb_t *)scb->ccb;
1390
1391 // no mapping required if no data to be transferred
1392 if (!scp->request_buffer || !scp->request_bufflen)
1393 return 0;
1394
1395 if (!scp->use_sg) { /* scatter-gather list not used */
1396
1397 page = virt_to_page(scp->request_buffer);
1398
1399 offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK);
1400
1401 ccb->buf_dma_h = pci_map_page(adapter->pdev, page, offset,
1402 scp->request_bufflen,
1403 scb->dma_direction);
1404 scb->dma_type = MRAID_DMA_WBUF;
1405
1406 /*
1407 * We need to handle special 64-bit commands that need a
1408 * minimum of 1 SG
1409 */
1410 sgcnt = 1;
1411 ccb->sgl64[0].address = ccb->buf_dma_h;
1412 ccb->sgl64[0].length = scp->request_bufflen;
1413
1414 return sgcnt;
1415 }
1416
1417 sgl = (struct scatterlist *)scp->request_buffer;
1418
1419 // The number of sg elements returned must not exceed our limit
1420 sgcnt = pci_map_sg(adapter->pdev, sgl, scp->use_sg,
1421 scb->dma_direction);
1422
1423 if (sgcnt > adapter->sglen) {
1424 con_log(CL_ANN, (KERN_CRIT
1425 "megaraid critical: too many sg elements:%d\n",
1426 sgcnt));
1427 BUG();
1428 }
1429
1430 scb->dma_type = MRAID_DMA_WSG;
1431
1432 for (i = 0; i < sgcnt; i++, sgl++) {
1433 ccb->sgl64[i].address = sg_dma_address(sgl);
1434 ccb->sgl64[i].length = sg_dma_len(sgl);
1435 }
1436
1437 // Return count of SG nodes
1438 return sgcnt;
1439}
1440
1441
1442/**
1443 * mbox_post_cmd - issue a mailbox command
1444 * @adapter - controller's soft state
1445 * @scb - command to be issued
1446 *
1447 * post the command to the controller if mailbox is availble.
1448 */
858119e1 1449static int
1da177e4
LT		 1450mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1451{
1452 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1453 mbox64_t *mbox64;
1454 mbox_t *mbox;
1455 mbox_ccb_t *ccb;
1456 unsigned long flags;
1457 unsigned int i = 0;
1458
1459
1460 ccb = (mbox_ccb_t *)scb->ccb;
1461 mbox = raid_dev->mbox;
1462 mbox64 = raid_dev->mbox64;
1463
1464 /*
1465 * Check for busy mailbox. If it is, return failure - the caller
1466 * should retry later.
1467 */
1468 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1469
1470 if (unlikely(mbox->busy)) {
1471 do {
1472 udelay(1);
1473 i++;
1474 rmb();
1475 } while(mbox->busy && (i < max_mbox_busy_wait));
1476
1477 if (mbox->busy) {
1478
1479 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1480
1481 return -1;
1482 }
1483 }
1484
1485
1486 // Copy this command's mailbox data into "adapter's" mailbox
1487 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1488 mbox->cmdid = scb->sno;
1489
1490 adapter->outstanding_cmds++;
1491
1492 if (scb->dma_direction == PCI_DMA_TODEVICE) {
1493 if (!scb->scp->use_sg) { // sg list not used
1494 pci_dma_sync_single_for_device(adapter->pdev,
1495 ccb->buf_dma_h,
1496 scb->scp->request_bufflen,
1497 PCI_DMA_TODEVICE);
1498 }
1499 else {
1500 pci_dma_sync_sg_for_device(adapter->pdev,
1501 scb->scp->request_buffer,
1502 scb->scp->use_sg, PCI_DMA_TODEVICE);
1503 }
1504 }
1505
1506 mbox->busy = 1; // Set busy
1507 mbox->poll = 0;
1508 mbox->ack = 0;
1509 wmb();
1510
1511 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1512
1513 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1514
1515 return 0;
1516}
1517
1518
1519/**
1520 * megaraid_queue_command - generic queue entry point for all LLDs
1521 * @scp : pointer to the scsi command to be executed
1522 * @done : callback routine to be called after the cmd has be completed
1523 *
1524 * Queue entry point for mailbox based controllers.
1525 */
1526static int
1527megaraid_queue_command(struct scsi_cmnd *scp, void (* done)(struct scsi_cmnd *))
1528{
1529 adapter_t *adapter;
1530 scb_t *scb;
1531 int if_busy;
1532
1533 adapter = SCP2ADAPTER(scp);
1534 scp->scsi_done = done;
1535 scp->result = 0;
1536
1da177e4
LT		 1537 /*
1538 * Allocate and build a SCB request
1539 * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1540 * not allocate scb. We will return non-zero status in that case.
1541 * NOTE: scb can be null even though certain commands completed
1542 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1543 * return 0 in that case, and we would do the callback right away.
1544 */
1545 if_busy = 0;
f2c8dc40 1546 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1da177e4
LT		 1547 if (!scb) { // command already completed
1548 done(scp);
1549 return 0;
1550 }
1551
f2c8dc40 1552 megaraid_mbox_runpendq(adapter, scb);
1da177e4
LT		 1553 return if_busy;
1554}
1555
1da177e4
LT		 1556/**
1557 * megaraid_mbox_build_cmd - transform the mid-layer scsi command to megaraid
1558 * firmware lingua
1559 * @adapter - controller's soft state
1560 * @scp - mid-layer scsi command pointer
1561 * @busy - set if request could not be completed because of lack of
1562 * resources
1563 *
1564 * convert the command issued by mid-layer to format understood by megaraid
1565 * firmware. We also complete certain command without sending them to firmware
1566 */
1567static scb_t *
1568megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1569{
1570 mraid_device_t *rdev = ADAP2RAIDDEV(adapter);
1571 int channel;
1572 int target;
1573 int islogical;
1574 mbox_ccb_t *ccb;
1575 mraid_passthru_t *pthru;
1576 mbox64_t *mbox64;
1577 mbox_t *mbox;
1578 scb_t *scb;
1579 char skip[] = "skipping";
1580 char scan[] = "scanning";
1581 char *ss;
1582
1583
1584 /*
1585 * Get the appropriate device map for the device this command is
1586 * intended for
1587 */
1588 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1589
1590 /*
1591 * Logical drive commands
1592 */
1593 if (islogical) {
1594 switch (scp->cmnd[0]) {
1595 case TEST_UNIT_READY:
1596 /*
1597 * Do we support clustering and is the support enabled
1598 * If no, return success always
1599 */
1600 if (!adapter->ha) {
1601 scp->result = (DID_OK << 16);
1602 return NULL;
1603 }
1604
1605 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1606 scp->result = (DID_ERROR << 16);
1607 *busy = 1;
1608 return NULL;
1609 }
1610
1611 scb->dma_direction = scp->sc_data_direction;
1612 scb->dev_channel = 0xFF;
1613 scb->dev_target = target;
1614 ccb = (mbox_ccb_t *)scb->ccb;
1615
1616 /*
1617 * The command id will be provided by the command
1618 * issuance routine
1619 */
1620 ccb->raw_mbox[0] = CLUSTER_CMD;
1621 ccb->raw_mbox[2] = RESERVATION_STATUS;
1622 ccb->raw_mbox[3] = target;
1623
1624 return scb;
1625
1626 case MODE_SENSE:
1627 if (scp->use_sg) {
1628 struct scatterlist *sgl;
1629 caddr_t vaddr;
1630
1631 sgl = (struct scatterlist *)scp->request_buffer;
1632 if (sgl->page) {
1633 vaddr = (caddr_t)
1634 (page_address((&sgl[0])->page)
1635 + (&sgl[0])->offset);
1636
1637 memset(vaddr, 0, scp->cmnd[4]);
1638 }
1639 else {
1640 con_log(CL_ANN, (KERN_WARNING
1641 "megaraid mailbox: invalid sg:%d\n",
1642 __LINE__));
1643 }
1644 }
1645 else {
1646 memset(scp->request_buffer, 0, scp->cmnd[4]);
1647 }
1648 scp->result = (DID_OK << 16);
1649 return NULL;
1650
1651 case INQUIRY:
1652 /*
1653 * Display the channel scan for logical drives
1654 * Do not display scan for a channel if already done.
1655 */
1656 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1657
1658 con_log(CL_ANN, (KERN_INFO
1659 "scsi[%d]: scanning scsi channel %d",
1660 adapter->host->host_no,
1661 SCP2CHANNEL(scp)));
1662
1663 con_log(CL_ANN, (
1664 " [virtual] for logical drives\n"));
1665
1666 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1667 }
1668
aa677bc7
JS		 1669 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1670 scp->sense_buffer[0] = 0x70;
1671 scp->sense_buffer[2] = ILLEGAL_REQUEST;
1672 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB;
1673 scp->result = CHECK_CONDITION << 1;
1674 return NULL;
1675 }
1676
1da177e4
LT		 1677 /* Fall through */
1678
1679 case READ_CAPACITY:
1680 /*
1681 * Do not allow LUN > 0 for logical drives and
1682 * requests for more than 40 logical drives
1683 */
1684 if (SCP2LUN(scp)) {
1685 scp->result = (DID_BAD_TARGET << 16);
1686 return NULL;
1687 }
1688 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1689 scp->result = (DID_BAD_TARGET << 16);
1690 return NULL;
1691 }
1692
1693
1694 /* Allocate a SCB and initialize passthru */
1695 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1696 scp->result = (DID_ERROR << 16);
1697 *busy = 1;
1698 return NULL;
1699 }
1700
1701 ccb = (mbox_ccb_t *)scb->ccb;
1702 scb->dev_channel = 0xFF;
1703 scb->dev_target = target;
1704 pthru = ccb->pthru;
1705 mbox = ccb->mbox;
1706 mbox64 = ccb->mbox64;
1707
1708 pthru->timeout = 0;
1709 pthru->ars = 1;
1710 pthru->reqsenselen = 14;
1711 pthru->islogical = 1;
1712 pthru->logdrv = target;
1713 pthru->cdblen = scp->cmd_len;
1714 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1715
1716 mbox->cmd = MBOXCMD_PASSTHRU64;
1717 scb->dma_direction = scp->sc_data_direction;
1718
1719 pthru->dataxferlen = scp->request_bufflen;
1720 pthru->dataxferaddr = ccb->sgl_dma_h;
1721 pthru->numsge = megaraid_mbox_mksgl(adapter,
1722 scb);
1723
1724 mbox->xferaddr = 0xFFFFFFFF;
1725 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h;
1726 mbox64->xferaddr_hi = 0;
1727
1728 return scb;
1729
1730 case READ_6:
1731 case WRITE_6:
1732 case READ_10:
1733 case WRITE_10:
1734 case READ_12:
1735 case WRITE_12:
1736
1737 /*
1738 * Allocate a SCB and initialize mailbox
1739 */
1740 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1741 scp->result = (DID_ERROR << 16);
1742 *busy = 1;
1743 return NULL;
1744 }
1745 ccb = (mbox_ccb_t *)scb->ccb;
1746 scb->dev_channel = 0xFF;
1747 scb->dev_target = target;
1748 mbox = ccb->mbox;
1749 mbox64 = ccb->mbox64;
1750 mbox->logdrv = target;
1751
1752 /*
1753 * A little HACK: 2nd bit is zero for all scsi read
1754 * commands and is set for all scsi write commands
1755 */
1756 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64:
1757 MBOXCMD_LREAD64 ;
1758
1759 /*
1760 * 6-byte READ(0x08) or WRITE(0x0A) cdb
1761 */
1762 if (scp->cmd_len == 6) {
1763 mbox->numsectors = (uint32_t)scp->cmnd[4];
1764 mbox->lba =
1765 ((uint32_t)scp->cmnd[1] << 16) |
1766 ((uint32_t)scp->cmnd[2] << 8) |
1767 (uint32_t)scp->cmnd[3];
1768
1769 mbox->lba &= 0x1FFFFF;
1770 }
1771
1772 /*
1773 * 10-byte READ(0x28) or WRITE(0x2A) cdb
1774 */
1775 else if (scp->cmd_len == 10) {
1776 mbox->numsectors =
1777 (uint32_t)scp->cmnd[8] |
1778 ((uint32_t)scp->cmnd[7] << 8);
1779 mbox->lba =
1780 ((uint32_t)scp->cmnd[2] << 24) |
1781 ((uint32_t)scp->cmnd[3] << 16) |
1782 ((uint32_t)scp->cmnd[4] << 8) |
1783 (uint32_t)scp->cmnd[5];
1784 }
1785
1786 /*
1787 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1788 */
1789 else if (scp->cmd_len == 12) {
1790 mbox->lba =
1791 ((uint32_t)scp->cmnd[2] << 24) |
1792 ((uint32_t)scp->cmnd[3] << 16) |
1793 ((uint32_t)scp->cmnd[4] << 8) |
1794 (uint32_t)scp->cmnd[5];
1795
1796 mbox->numsectors =
1797 ((uint32_t)scp->cmnd[6] << 24) |
1798 ((uint32_t)scp->cmnd[7] << 16) |
1799 ((uint32_t)scp->cmnd[8] << 8) |
1800 (uint32_t)scp->cmnd[9];
1801 }
1802 else {
1803 con_log(CL_ANN, (KERN_WARNING
1804 "megaraid: unsupported CDB length\n"));
1805
1806 megaraid_dealloc_scb(adapter, scb);
1807
1808 scp->result = (DID_ERROR << 16);
1809 return NULL;
1810 }
1811
1812 scb->dma_direction = scp->sc_data_direction;
1813
1814 // Calculate Scatter-Gather info
1815 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h;
1816 mbox->numsge = megaraid_mbox_mksgl(adapter,
1817 scb);
1818 mbox->xferaddr = 0xFFFFFFFF;
1819 mbox64->xferaddr_hi = 0;
1820
1821 return scb;
1822
1823 case RESERVE:
1824 case RELEASE:
1825 /*
1826 * Do we support clustering and is the support enabled
1827 */
1828 if (!adapter->ha) {
1829 scp->result = (DID_BAD_TARGET << 16);
1830 return NULL;
1831 }
1832
1833 /*
1834 * Allocate a SCB and initialize mailbox
1835 */
1836 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1837 scp->result = (DID_ERROR << 16);
1838 *busy = 1;
1839 return NULL;
1840 }
1841
1842 ccb = (mbox_ccb_t *)scb->ccb;
1843 scb->dev_channel = 0xFF;
1844 scb->dev_target = target;
1845 ccb->raw_mbox[0] = CLUSTER_CMD;
1846 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ?
1847 RESERVE_LD : RELEASE_LD;
1848
1849 ccb->raw_mbox[3] = target;
1850 scb->dma_direction = scp->sc_data_direction;
1851
1852 return scb;
1853
1854 default:
1855 scp->result = (DID_BAD_TARGET << 16);
1856 return NULL;
1857 }
1858 }
1859 else { // Passthru device commands
1860
1861 // Do not allow access to target id > 15 or LUN > 7
1862 if (target > 15 || SCP2LUN(scp) > 7) {
1863 scp->result = (DID_BAD_TARGET << 16);
1864 return NULL;
1865 }
1866
1867 // if fast load option was set and scan for last device is
1868 // over, reset the fast_load flag so that during a possible
1869 // next scan, devices can be made available
1870 if (rdev->fast_load && (target == 15) &&
1871 (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1872
1873 con_log(CL_ANN, (KERN_INFO
1874 "megaraid[%d]: physical device scan re-enabled\n",
1875 adapter->host->host_no));
1876 rdev->fast_load = 0;
1877 }
1878
1879 /*
1880 * Display the channel scan for physical devices
1881 */
1882 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1883
1884 ss = rdev->fast_load ? skip : scan;
1885
1886 con_log(CL_ANN, (KERN_INFO
1887 "scsi[%d]: %s scsi channel %d [Phy %d]",
1888 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1889 channel));
1890
1891 con_log(CL_ANN, (
1892 " for non-raid devices\n"));
1893
1894 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1895 }
1896
1897 // disable channel sweep if fast load option given
1898 if (rdev->fast_load) {
1899 scp->result = (DID_BAD_TARGET << 16);
1900 return NULL;
1901 }
1902
1903 // Allocate a SCB and initialize passthru
1904 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1905 scp->result = (DID_ERROR << 16);
1906 *busy = 1;
1907 return NULL;
1908 }
1909
1910 ccb = (mbox_ccb_t *)scb->ccb;
1911 scb->dev_channel = channel;
1912 scb->dev_target = target;
1913 scb->dma_direction = scp->sc_data_direction;
1914 mbox = ccb->mbox;
1915 mbox64 = ccb->mbox64;
1916
1917 // Does this firmware support extended CDBs
1918 if (adapter->max_cdb_sz == 16) {
1919 mbox->cmd = MBOXCMD_EXTPTHRU;
1920
1921 megaraid_mbox_prepare_epthru(adapter, scb, scp);
1922
1923 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h;
1924 mbox64->xferaddr_hi = 0;
1925 mbox->xferaddr = 0xFFFFFFFF;
1926 }
1927 else {
1928 mbox->cmd = MBOXCMD_PASSTHRU64;
1929
1930 megaraid_mbox_prepare_pthru(adapter, scb, scp);
1931
1932 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h;
1933 mbox64->xferaddr_hi = 0;
1934 mbox->xferaddr = 0xFFFFFFFF;
1935 }
1936 return scb;
1937 }
1938
1939 // NOT REACHED
1940}
1941
1942
1943/**
1944 * megaraid_mbox_runpendq - execute commands queued in the pending queue
1945 * @adapter : controller's soft state
1946 * @scb : SCB to be queued in the pending list
1947 *
1948 * scan the pending list for commands which are not yet issued and try to
1949 * post to the controller. The SCB can be a null pointer, which would indicate
1950 * no SCB to be queue, just try to execute the ones in the pending list.
1951 *
1952 * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1953 * out from the head of the pending list. If it is successfully issued, the
1954 * next SCB is at the head now.
1955 */
1956static void
1957megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1958{
1959 scb_t *scb;
1960 unsigned long flags;
1961
1962 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1963
1964 if (scb_q) {
1965 scb_q->state = SCB_PENDQ;
1966 list_add_tail(&scb_q->list, &adapter->pend_list);
1967 }
1968
1969 // if the adapter in not in quiescent mode, post the commands to FW
1970 if (adapter->quiescent) {
1971 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1972 return;
1973 }
1974
1975 while (!list_empty(&adapter->pend_list)) {
1976
1977 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1978
1979 scb = list_entry(adapter->pend_list.next, scb_t, list);
1980
1981 // remove the scb from the pending list and try to
1982 // issue. If we are unable to issue it, put back in
1983 // the pending list and return
1984
1985 list_del_init(&scb->list);
1986
1987 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1988
1989 // if mailbox was busy, return SCB back to pending
1990 // list. Make sure to add at the head, since that's
1991 // where it would have been removed from
1992
1993 scb->state = SCB_ISSUED;
1994
1995 if (mbox_post_cmd(adapter, scb) != 0) {
1996
1997 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1998
1999 scb->state = SCB_PENDQ;
2000
2001 list_add(&scb->list, &adapter->pend_list);
2002
2003 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2004 flags);
2005
2006 return;
2007 }
2008
2009 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2010 }
2011
2012 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2013
2014
2015 return;
2016}
2017
2018
2019/**
2020 * megaraid_mbox_prepare_pthru - prepare a command for physical devices
2021 * @adapter - pointer to controller's soft state
2022 * @scb - scsi control block
2023 * @scp - scsi command from the mid-layer
2024 *
2025 * prepare a command for the scsi physical devices
2026 */
2027static void
2028megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
2029 struct scsi_cmnd *scp)
2030{
2031 mbox_ccb_t *ccb;
2032 mraid_passthru_t *pthru;
2033 uint8_t channel;
2034 uint8_t target;
2035
2036 ccb = (mbox_ccb_t *)scb->ccb;
2037 pthru = ccb->pthru;
2038 channel = scb->dev_channel;
2039 target = scb->dev_target;
2040
2041 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2042 pthru->timeout = 4;
2043 pthru->ars = 1;
2044 pthru->islogical = 0;
2045 pthru->channel = 0;
2046 pthru->target = (channel << 4) | target;
2047 pthru->logdrv = SCP2LUN(scp);
2048 pthru->reqsenselen = 14;
2049 pthru->cdblen = scp->cmd_len;
2050
2051 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2052
2053 if (scp->request_bufflen) {
2054 pthru->dataxferlen = scp->request_bufflen;
2055 pthru->dataxferaddr = ccb->sgl_dma_h;
2056 pthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2057 }
2058 else {
2059 pthru->dataxferaddr = 0;
2060 pthru->dataxferlen = 0;
2061 pthru->numsge = 0;
2062 }
2063 return;
2064}
2065
2066
2067/**
2068 * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2069 * @adapter - pointer to controller's soft state
2070 * @scb - scsi control block
2071 * @scp - scsi command from the mid-layer
2072 *
2073 * prepare a command for the scsi physical devices. This rountine prepares
2074 * commands for devices which can take extended CDBs (>10 bytes)
2075 */
2076static void
2077megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2078 struct scsi_cmnd *scp)
2079{
2080 mbox_ccb_t *ccb;
2081 mraid_epassthru_t *epthru;
2082 uint8_t channel;
2083 uint8_t target;
2084
2085 ccb = (mbox_ccb_t *)scb->ccb;
2086 epthru = ccb->epthru;
2087 channel = scb->dev_channel;
2088 target = scb->dev_target;
2089
2090 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2091 epthru->timeout = 4;
2092 epthru->ars = 1;
2093 epthru->islogical = 0;
2094 epthru->channel = 0;
2095 epthru->target = (channel << 4) | target;
2096 epthru->logdrv = SCP2LUN(scp);
2097 epthru->reqsenselen = 14;
2098 epthru->cdblen = scp->cmd_len;
2099
2100 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2101
2102 if (scp->request_bufflen) {
2103 epthru->dataxferlen = scp->request_bufflen;
2104 epthru->dataxferaddr = ccb->sgl_dma_h;
2105 epthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2106 }
2107 else {
2108 epthru->dataxferaddr = 0;
2109 epthru->dataxferlen = 0;
2110 epthru->numsge = 0;
2111 }
2112 return;
2113}
2114
2115
2116/**
2117 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2118 * @adapter - controller's soft state
2119 *
2120 * Interrupt ackrowledgement sequence for memory mapped HBAs. Find out the
2121 * completed command and put them on the completed list for later processing.
2122 *
2123 * Returns: 1 if the interrupt is valid, 0 otherwise
2124 */
858119e1 2125static int
1da177e4
LT		 2126megaraid_ack_sequence(adapter_t *adapter)
2127{
2128 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2129 mbox_t *mbox;
2130 scb_t *scb;
2131 uint8_t nstatus;
2132 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS];
2133 struct list_head clist;
2134 int handled;
2135 uint32_t dword;
2136 unsigned long flags;
2137 int i, j;
2138
2139
2140 mbox = raid_dev->mbox;
2141
2142 // move the SCBs from the firmware completed array to our local list
2143 INIT_LIST_HEAD(&clist);
2144
2145 // loop till F/W has more commands for us to complete
2146 handled = 0;
2147 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2148 do {
2149 /*
2150 * Check if a valid interrupt is pending. If found, force the
2151 * interrupt line low.
2152 */
2153 dword = RDOUTDOOR(raid_dev);
2154 if (dword != 0x10001234) break;
2155
2156 handled = 1;
2157
2158 WROUTDOOR(raid_dev, 0x10001234);
2159
2160 nstatus = 0;
2161 // wait for valid numstatus to post
2162 for (i = 0; i < 0xFFFFF; i++) {
2163 if (mbox->numstatus != 0xFF) {
2164 nstatus = mbox->numstatus;
2165 break;
2166 }
2167 rmb();
2168 }
2169 mbox->numstatus = 0xFF;
2170
2171 adapter->outstanding_cmds -= nstatus;
2172
2173 for (i = 0; i < nstatus; i++) {
2174
2175 // wait for valid command index to post
2176 for (j = 0; j < 0xFFFFF; j++) {
2177 if (mbox->completed[i] != 0xFF) break;
2178 rmb();
2179 }
2180 completed[i] = mbox->completed[i];
2181 mbox->completed[i] = 0xFF;
2182
2183 if (completed[i] == 0xFF) {
2184 con_log(CL_ANN, (KERN_CRIT
2185 "megaraid: command posting timed out\n"));
2186
2187 BUG();
2188 continue;
2189 }
2190
2191 // Get SCB associated with this command id
2192 if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2193 // a cmm command
2194 scb = adapter->uscb_list + (completed[i] -
2195 MBOX_MAX_SCSI_CMDS);
2196 }
2197 else {
2198 // an os command
2199 scb = adapter->kscb_list + completed[i];
2200 }
2201
2202 scb->status = mbox->status;
2203 list_add_tail(&scb->list, &clist);
2204 }
2205
2206 // Acknowledge interrupt
2207 WRINDOOR(raid_dev, 0x02);
2208
2209 } while(1);
2210
2211 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2212
2213
2214 // put the completed commands in the completed list. DPC would
2215 // complete these commands later
2216 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2217
2218 list_splice(&clist, &adapter->completed_list);
2219
2220 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2221
2222
2223 // schedule the DPC if there is some work for it
2224 if (handled)
2225 tasklet_schedule(&adapter->dpc_h);
2226
2227 return handled;
2228}
2229
2230
2231/**
2232 * megaraid_isr - isr for memory based mailbox based controllers
2233 * @irq - irq
2234 * @devp - pointer to our soft state
2235 * @regs - unused
2236 *
2237 * Interrupt service routine for memory-mapped mailbox controllers.
2238 */
2239static irqreturn_t
7d12e780 2240megaraid_isr(int irq, void *devp)
1da177e4
LT		 2241{
2242 adapter_t *adapter = devp;
2243 int handled;
2244
2245 handled = megaraid_ack_sequence(adapter);
2246
2247 /* Loop through any pending requests */
2248 if (!adapter->quiescent) {
2249 megaraid_mbox_runpendq(adapter, NULL);
2250 }
2251
2252 return IRQ_RETVAL(handled);
2253}
2254
2255
2256/**
2257 * megaraid_mbox_sync_scb - sync kernel buffers
2258 * @adapter : controller's soft state
2259 * @scb : pointer to the resource packet
2260 *
2261 * DMA sync if required.
2262 */
858119e1 2263static void
1da177e4
LT		 2264megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2265{
2266 mbox_ccb_t *ccb;
2267
2268 ccb = (mbox_ccb_t *)scb->ccb;
2269
2270 switch (scb->dma_type) {
2271
2272 case MRAID_DMA_WBUF:
2273 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2274 pci_dma_sync_single_for_cpu(adapter->pdev,
2275 ccb->buf_dma_h,
2276 scb->scp->request_bufflen,
2277 PCI_DMA_FROMDEVICE);
2278 }
2279
2280 pci_unmap_page(adapter->pdev, ccb->buf_dma_h,
2281 scb->scp->request_bufflen, scb->dma_direction);
2282
2283 break;
2284
2285 case MRAID_DMA_WSG:
2286 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2287 pci_dma_sync_sg_for_cpu(adapter->pdev,
2288 scb->scp->request_buffer,
2289 scb->scp->use_sg, PCI_DMA_FROMDEVICE);
2290 }
2291
2292 pci_unmap_sg(adapter->pdev, scb->scp->request_buffer,
2293 scb->scp->use_sg, scb->dma_direction);
2294
2295 break;
2296
2297 default:
2298 break;
2299 }
2300
2301 return;
2302}
2303
2304
2305/**
2306 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2307 * @devp : pointer to HBA soft state
2308 *
2309 * Pick up the commands from the completed list and send back to the owners.
2310 * This is a reentrant function and does not assume any locks are held while
2311 * it is being called.
2312 */
2313static void
2314megaraid_mbox_dpc(unsigned long devp)
2315{
2316 adapter_t *adapter = (adapter_t *)devp;
2317 mraid_device_t *raid_dev;
2318 struct list_head clist;
2319 struct scatterlist *sgl;
2320 scb_t *scb;
2321 scb_t *tmp;
2322 struct scsi_cmnd *scp;
2323 mraid_passthru_t *pthru;
2324 mraid_epassthru_t *epthru;
2325 mbox_ccb_t *ccb;
2326 int islogical;
2327 int pdev_index;
2328 int pdev_state;
2329 mbox_t *mbox;
2330 unsigned long flags;
2331 uint8_t c;
2332 int status;
c005fb4f 2333 uioc_t *kioc;
1da177e4
LT		 2334
2335
2336 if (!adapter) return;
2337
2338 raid_dev = ADAP2RAIDDEV(adapter);
2339
2340 // move the SCBs from the completed list to our local list
2341 INIT_LIST_HEAD(&clist);
2342
2343 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2344
2345 list_splice_init(&adapter->completed_list, &clist);
2346
2347 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2348
2349
2350 list_for_each_entry_safe(scb, tmp, &clist, list) {
2351
2352 status = scb->status;
2353 scp = scb->scp;
2354 ccb = (mbox_ccb_t *)scb->ccb;
2355 pthru = ccb->pthru;
2356 epthru = ccb->epthru;
2357 mbox = ccb->mbox;
2358
2359 // Make sure f/w has completed a valid command
2360 if (scb->state != SCB_ISSUED) {
2361 con_log(CL_ANN, (KERN_CRIT
2362 "megaraid critical err: invalid command %d:%d:%p\n",
2363 scb->sno, scb->state, scp));
2364 BUG();
2365 continue; // Must never happen!
2366 }
2367
2368 // check for the management command and complete it right away
2369 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2370 scb->state = SCB_FREE;
2371 scb->status = status;
2372
2373 // remove from local clist
2374 list_del_init(&scb->list);
2375
c005fb4f
JS		 2376 kioc = (uioc_t *)scb->gp;
2377 kioc->status = 0;
2378
1da177e4
LT		 2379 megaraid_mbox_mm_done(adapter, scb);
2380
2381 continue;
2382 }
2383
2384 // Was an abort issued for this command earlier
2385 if (scb->state & SCB_ABORT) {
2386 con_log(CL_ANN, (KERN_NOTICE
2387 "megaraid: aborted cmd %lx[%x] completed\n",
2388 scp->serial_number, scb->sno));
2389 }
2390
2391 /*
2392 * If the inquiry came of a disk drive which is not part of
2393 * any RAID array, expose it to the kernel. For this to be
2394 * enabled, user must set the "megaraid_expose_unconf_disks"
2395 * flag to 1 by specifying it on module parameter list.
2396 * This would enable data migration off drives from other
2397 * configurations.
2398 */
2399 islogical = MRAID_IS_LOGICAL(adapter, scp);
2400 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2401 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2402
2403 if (scp->use_sg) {
2404 sgl = (struct scatterlist *)
2405 scp->request_buffer;
2406
2407 if (sgl->page) {
2408 c = *(unsigned char *)
2409 (page_address((&sgl[0])->page) +
2410 (&sgl[0])->offset);
2411 }
2412 else {
2413 con_log(CL_ANN, (KERN_WARNING
2414 "megaraid mailbox: invalid sg:%d\n",
2415 __LINE__));
2416 c = 0;
2417 }
2418 }
2419 else {
2420 c = *(uint8_t *)scp->request_buffer;
2421 }
2422
2423 if ((c & 0x1F ) == TYPE_DISK) {
2424 pdev_index = (scb->dev_channel * 16) +
2425 scb->dev_target;
2426 pdev_state =
2427 raid_dev->pdrv_state[pdev_index] & 0x0F;
2428
2429 if (pdev_state == PDRV_ONLINE ||
2430 pdev_state == PDRV_FAILED ||
2431 pdev_state == PDRV_RBLD ||
2432 pdev_state == PDRV_HOTSPARE ||
2433 megaraid_expose_unconf_disks == 0) {
2434
2435 status = 0xF0;
2436 }
2437 }
2438 }
2439
2440 // Convert MegaRAID status to Linux error code
2441 switch (status) {
2442
2443 case 0x00:
2444
2445 scp->result = (DID_OK << 16);
2446 break;
2447
2448 case 0x02:
2449
2450 /* set sense_buffer and result fields */
2451 if (mbox->cmd == MBOXCMD_PASSTHRU ||
2452 mbox->cmd == MBOXCMD_PASSTHRU64) {
2453
2454 memcpy(scp->sense_buffer, pthru->reqsensearea,
2455 14);
2456
2457 scp->result = DRIVER_SENSE << 24 |
2458 DID_OK << 16 | CHECK_CONDITION << 1;
2459 }
2460 else {
2461 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2462
2463 memcpy(scp->sense_buffer,
2464 epthru->reqsensearea, 14);
2465
2466 scp->result = DRIVER_SENSE << 24 |
2467 DID_OK << 16 |
2468 CHECK_CONDITION << 1;
2469 } else {
2470 scp->sense_buffer[0] = 0x70;
2471 scp->sense_buffer[2] = ABORTED_COMMAND;
2472 scp->result = CHECK_CONDITION << 1;
2473 }
2474 }
2475 break;
2476
2477 case 0x08:
2478
2479 scp->result = DID_BUS_BUSY << 16 | status;
2480 break;
2481
2482 default:
2483
2484 /*
2485 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2486 * failed
2487 */
2488 if (scp->cmnd[0] == TEST_UNIT_READY) {
2489 scp->result = DID_ERROR << 16 |
2490 RESERVATION_CONFLICT << 1;
2491 }
2492 else
2493 /*
2494 * Error code returned is 1 if Reserve or Release
2495 * failed or the input parameter is invalid
2496 */
2497 if (status == 1 && (scp->cmnd[0] == RESERVE ||
2498 scp->cmnd[0] == RELEASE)) {
2499
2500 scp->result = DID_ERROR << 16 |
2501 RESERVATION_CONFLICT << 1;
2502 }
2503 else {
2504 scp->result = DID_BAD_TARGET << 16 | status;
2505 }
2506 }
2507
2508 // print a debug message for all failed commands
2509 if (status) {
2510 megaraid_mbox_display_scb(adapter, scb);
2511 }
2512
2513 // Free our internal resources and call the mid-layer callback
2514 // routine
2515 megaraid_mbox_sync_scb(adapter, scb);
2516
2517 // remove from local clist
2518 list_del_init(&scb->list);
2519
2520 // put back in free list
2521 megaraid_dealloc_scb(adapter, scb);
2522
2523 // send the scsi packet back to kernel
1da177e4 2524 scp->scsi_done(scp);
1da177e4
LT		 2525 }
2526
2527 return;
2528}
2529
2530
2531/**
2532 * megaraid_abort_handler - abort the scsi command
2533 * @scp : command to be aborted
2534 *
2535 * Abort a previous SCSI request. Only commands on the pending list can be
2536 * aborted. All the commands issued to the F/W must complete.
2537 **/
2538static int
f2c8dc40 2539megaraid_abort_handler(struct scsi_cmnd *scp)
1da177e4
LT		 2540{
2541 adapter_t *adapter;
2542 mraid_device_t *raid_dev;
2543 scb_t *scb;
2544 scb_t *tmp;
2545 int found;
2546 unsigned long flags;
2547 int i;
2548
2549
2550 adapter = SCP2ADAPTER(scp);
2551 raid_dev = ADAP2RAIDDEV(adapter);
2552
1da177e4
LT		 2553 con_log(CL_ANN, (KERN_WARNING
2554 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2555 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2556 SCP2TARGET(scp), SCP2LUN(scp)));
2557
2558 // If FW has stopped responding, simply return failure
2559 if (raid_dev->hw_error) {
2560 con_log(CL_ANN, (KERN_NOTICE
2561 "megaraid: hw error, not aborting\n"));
2562 return FAILED;
2563 }
2564
2565 // There might a race here, where the command was completed by the
2566 // firmware and now it is on the completed list. Before we could
2567 // complete the command to the kernel in dpc, the abort came.
2568 // Find out if this is the case to avoid the race.
2569 scb = NULL;
2570 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2571 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2572
2573 if (scb->scp == scp) { // Found command
2574
2575 list_del_init(&scb->list); // from completed list
2576
2577 con_log(CL_ANN, (KERN_WARNING
2578 "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2579 scp->serial_number, scb->sno,
2580 scb->dev_channel, scb->dev_target));
2581
2582 scp->result = (DID_ABORT << 16);
2583 scp->scsi_done(scp);
2584
2585 megaraid_dealloc_scb(adapter, scb);
2586
2587 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2588 flags);
2589
2590 return SUCCESS;
2591 }
2592 }
2593 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2594
2595
2596 // Find out if this command is still on the pending list. If it is and
2597 // was never issued, abort and return success. If the command is owned
2598 // by the firmware, we must wait for it to complete by the FW.
2599 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2600 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2601
2602 if (scb->scp == scp) { // Found command
2603
2604 list_del_init(&scb->list); // from pending list
2605
2606 ASSERT(!(scb->state & SCB_ISSUED));
2607
2608 con_log(CL_ANN, (KERN_WARNING
2609 "megaraid abort: %ld[%d:%d], driver owner\n",
2610 scp->serial_number, scb->dev_channel,
2611 scb->dev_target));
2612
2613 scp->result = (DID_ABORT << 16);
2614 scp->scsi_done(scp);
2615
2616 megaraid_dealloc_scb(adapter, scb);
2617
2618 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2619 flags);
2620
2621 return SUCCESS;
2622 }
2623 }
2624 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2625
2626
2627 // Check do we even own this command, in which case this would be
2628 // owned by the firmware. The only way to locate the FW scb is to
2629 // traverse through the list of all SCB, since driver does not
2630 // maintain these SCBs on any list
2631 found = 0;
f2c8dc40 2632 spin_lock_irq(&adapter->lock);
1da177e4
LT		 2633 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2634 scb = adapter->kscb_list + i;
2635
2636 if (scb->scp == scp) {
2637
2638 found = 1;
2639
2640 if (!(scb->state & SCB_ISSUED)) {
2641 con_log(CL_ANN, (KERN_WARNING
2642 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2643 scp->serial_number, scb->sno, scb->dev_channel,
2644 scb->dev_target));
2645 BUG();
2646 }
2647 else {
2648 con_log(CL_ANN, (KERN_WARNING
2649 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2650 scp->serial_number, scb->sno, scb->dev_channel,
2651 scb->dev_target));
2652 }
2653 }
2654 }
f2c8dc40 2655 spin_unlock_irq(&adapter->lock);
1da177e4
LT		 2656
2657 if (!found) {
2658 con_log(CL_ANN, (KERN_WARNING
2659 "megaraid abort: scsi cmd:%ld, do now own\n",
2660 scp->serial_number));
2661
2662 // FIXME: Should there be a callback for this command?
2663 return SUCCESS;
2664 }
2665
2666 // We cannot actually abort a command owned by firmware, return
2667 // failure and wait for reset. In host reset handler, we will find out
2668 // if the HBA is still live
2669 return FAILED;
2670}
2671
1da177e4
LT		 2672/**
2673 * megaraid_reset_handler - device reset hadler for mailbox based driver
2674 * @scp : reference command
2675 *
2676 * Reset handler for the mailbox based controller. First try to find out if
2677 * the FW is still live, in which case the outstanding commands counter mut go
2678 * down to 0. If that happens, also issue the reservation reset command to
2679 * relinquish (possible) reservations on the logical drives connected to this
2680 * host
2681 **/
2682static int
f2c8dc40 2683megaraid_reset_handler(struct scsi_cmnd *scp)
1da177e4
LT		 2684{
2685 adapter_t *adapter;
2686 scb_t *scb;
2687 scb_t *tmp;
2688 mraid_device_t *raid_dev;
2689 unsigned long flags;
2690 uint8_t raw_mbox[sizeof(mbox_t)];
2691 int rval;
2692 int recovery_window;
2693 int recovering;
2694 int i;
c005fb4f 2695 uioc_t *kioc;
1da177e4
LT		 2696
2697 adapter = SCP2ADAPTER(scp);
2698 raid_dev = ADAP2RAIDDEV(adapter);
2699
1da177e4
LT		 2700 // return failure if adapter is not responding
2701 if (raid_dev->hw_error) {
2702 con_log(CL_ANN, (KERN_NOTICE
2703 "megaraid: hw error, cannot reset\n"));
2704 return FAILED;
2705 }
2706
2707
2708 // Under exceptional conditions, FW can take up to 3 minutes to
2709 // complete command processing. Wait for additional 2 minutes for the
2710 // pending commands counter to go down to 0. If it doesn't, let the
2711 // controller be marked offline
2712 // Also, reset all the commands currently owned by the driver
2713 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2714 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
1da177e4
LT		 2715 list_del_init(&scb->list); // from pending list
2716
c005fb4f
JS		 2717 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2718 con_log(CL_ANN, (KERN_WARNING
2719 "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2720 scb->sno, scb->dev_channel, scb->dev_target));
1da177e4 2721
c005fb4f 2722 scb->status = -1;
1da177e4 2723
c005fb4f
JS		 2724 kioc = (uioc_t *)scb->gp;
2725 kioc->status = -EFAULT;
2726
2727 megaraid_mbox_mm_done(adapter, scb);
2728 } else {
2729 if (scb->scp == scp) { // Found command
2730 con_log(CL_ANN, (KERN_WARNING
2731 "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2732 scp->serial_number, scb->sno,
2733 scb->dev_channel, scb->dev_target));
2734 } else {
2735 con_log(CL_ANN, (KERN_WARNING
2736 "megaraid: IO packet with %d[%d:%d] being reset\n",
2737 scb->sno, scb->dev_channel, scb->dev_target));
2738 }
2739
2740 scb->scp->result = (DID_RESET << 16);
2741 scb->scp->scsi_done(scb->scp);
2742
2743 megaraid_dealloc_scb(adapter, scb);
2744 }
1da177e4
LT		 2745 }
2746 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2747
2748 if (adapter->outstanding_cmds) {
2749 con_log(CL_ANN, (KERN_NOTICE
2750 "megaraid: %d outstanding commands. Max wait %d sec\n",
c005fb4f
JS		 2751 adapter->outstanding_cmds,
2752 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
1da177e4
LT		 2753 }
2754
1da177e4
LT		 2755 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2756
2757 recovering = adapter->outstanding_cmds;
2758
c005fb4f 2759 for (i = 0; i < recovery_window; i++) {
1da177e4
LT		 2760
2761 megaraid_ack_sequence(adapter);
2762
2763 // print a message once every 5 seconds only
2764 if (!(i % 5)) {
2765 con_log(CL_ANN, (
2766 "megaraid mbox: Wait for %d commands to complete:%d\n",
2767 adapter->outstanding_cmds,
c005fb4f 2768 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
1da177e4
LT		 2769 }
2770
2771 // bailout if no recovery happended in reset time
c005fb4f 2772 if (adapter->outstanding_cmds == 0) {
1da177e4
LT		 2773 break;
2774 }
2775
2776 msleep(1000);
2777 }
2778
f2c8dc40 2779 spin_lock(&adapter->lock);
1da177e4
LT		 2780
2781 // If still outstanding commands, bail out
2782 if (adapter->outstanding_cmds) {
2783 con_log(CL_ANN, (KERN_WARNING
2784 "megaraid mbox: critical hardware error!\n"));
2785
2786 raid_dev->hw_error = 1;
2787
f2c8dc40
CH		 2788 rval = FAILED;
2789 goto out;
1da177e4
LT		 2790 }
2791 else {
2792 con_log(CL_ANN, (KERN_NOTICE
2793 "megaraid mbox: reset sequence completed sucessfully\n"));
2794 }
2795
2796
2797 // If the controller supports clustering, reset reservations
f2c8dc40
CH		 2798 if (!adapter->ha) {
2799 rval = SUCCESS;
2800 goto out;
2801 }
1da177e4
LT		 2802
2803 // clear reservations if any
2804 raw_mbox[0] = CLUSTER_CMD;
2805 raw_mbox[2] = RESET_RESERVATIONS;
2806
2807 rval = SUCCESS;
2808 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2809 con_log(CL_ANN,
2810 (KERN_INFO "megaraid: reservation reset\n"));
2811 }
2812 else {
2813 rval = FAILED;
2814 con_log(CL_ANN, (KERN_WARNING
2815 "megaraid: reservation reset failed\n"));
2816 }
2817
f2c8dc40
CH		 2818 out:
2819 spin_unlock_irq(&adapter->lock);
1da177e4
LT		 2820 return rval;
2821}
2822
1da177e4
LT		 2823/*
2824 * START: internal commands library
2825 *
2826 * This section of the driver has the common routine used by the driver and
2827 * also has all the FW routines
2828 */
2829
2830/**
2831 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2832 * @adapter - controller's soft state
2833 * @raw_mbox - the mailbox
2834 *
2835 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2836 * controllers
2837 */
2838static int
2839mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2840{
2841 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2842 mbox64_t *mbox64;
2843 mbox_t *mbox;
2844 uint8_t status;
2845 int i;
2846
2847
2848 mbox64 = raid_dev->mbox64;
2849 mbox = raid_dev->mbox;
2850
2851 /*
2852 * Wait until mailbox is free
2853 */
2854 if (megaraid_busywait_mbox(raid_dev) != 0)
2855 goto blocked_mailbox;
2856
2857 /*
2858 * Copy mailbox data into host structure
2859 */
2860 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2861 mbox->cmdid = 0xFE;
2862 mbox->busy = 1;
2863 mbox->poll = 0;
2864 mbox->ack = 0;
2865 mbox->numstatus = 0xFF;
2866 mbox->status = 0xFF;
2867
2868 wmb();
2869 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2870
2871 // wait for maximum 1 second for status to post. If the status is not
2872 // available within 1 second, assume FW is initializing and wait
2873 // for an extended amount of time
2874 if (mbox->numstatus == 0xFF) { // status not yet available
53b3531b 2875 udelay(25);
1da177e4
LT		 2876
2877 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2878 rmb();
2879 msleep(1);
2880 }
2881
2882
2883 if (i == 1000) {
2884 con_log(CL_ANN, (KERN_NOTICE
2885 "megaraid mailbox: wait for FW to boot "));
2886
2887 for (i = 0; (mbox->numstatus == 0xFF) &&
2888 (i < MBOX_RESET_WAIT); i++) {
2889 rmb();
2890 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2891 MBOX_RESET_WAIT - i));
2892 msleep(1000);
2893 }
2894
2895 if (i == MBOX_RESET_WAIT) {
2896
2897 con_log(CL_ANN, (
2898 "\nmegaraid mailbox: status not available\n"));
2899
2900 return -1;
2901 }
2902 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2903 }
2904 }
2905
2906 // wait for maximum 1 second for poll semaphore
2907 if (mbox->poll != 0x77) {
2908 udelay(25);
2909
2910 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2911 rmb();
2912 msleep(1);
2913 }
2914
2915 if (i == 1000) {
2916 con_log(CL_ANN, (KERN_WARNING
2917 "megaraid mailbox: could not get poll semaphore\n"));
2918 return -1;
2919 }
2920 }
2921
2922 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2923 wmb();
2924
2925 // wait for maximum 1 second for acknowledgement
2926 if (RDINDOOR(raid_dev) & 0x2) {
2927 udelay(25);
2928
2929 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2930 rmb();
2931 msleep(1);
2932 }
2933
2934 if (i == 1000) {
2935 con_log(CL_ANN, (KERN_WARNING
2936 "megaraid mailbox: could not acknowledge\n"));
2937 return -1;
2938 }
2939 }
2940 mbox->poll = 0;
2941 mbox->ack = 0x77;
2942
2943 status = mbox->status;
2944
2945 // invalidate the completed command id array. After command
2946 // completion, firmware would write the valid id.
2947 mbox->numstatus = 0xFF;
2948 mbox->status = 0xFF;
2949 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2950 mbox->completed[i] = 0xFF;
2951 }
2952
2953 return status;
2954
2955blocked_mailbox:
2956
2957 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2958 return -1;
2959}
2960
2961
2962/**
2963 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2964 * @adapter - controller's soft state
2965 * @raw_mbox - the mailbox
2966 *
2967 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2968 * controllers. This is a faster version of the synchronous command and
2969 * therefore can be called in interrupt-context as well
2970 */
2971static int
2972mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2973{
2974 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2975 mbox_t *mbox;
2976 long i;
2977
2978
2979 mbox = raid_dev->mbox;
2980
2981 // return immediately if the mailbox is busy
2982 if (mbox->busy) return -1;
2983
2984 // Copy mailbox data into host structure
2985 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2986 mbox->cmdid = 0xFE;
2987 mbox->busy = 1;
2988 mbox->poll = 0;
2989 mbox->ack = 0;
2990 mbox->numstatus = 0xFF;
2991 mbox->status = 0xFF;
2992
2993 wmb();
2994 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2995
c005fb4f 2996 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
1da177e4 2997 if (mbox->numstatus != 0xFF) break;
ed7e8ef7 2998 rmb();
c005fb4f 2999 udelay(MBOX_SYNC_DELAY_200);
1da177e4
LT		 3000 }
3001
c005fb4f 3002 if (i == MBOX_SYNC_WAIT_CNT) {
1da177e4
LT		 3003 // We may need to re-calibrate the counter
3004 con_log(CL_ANN, (KERN_CRIT
3005 "megaraid: fast sync command timed out\n"));
3006 }
3007
3008 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
3009 wmb();
3010
3011 return mbox->status;
3012}
3013
3014
3015/**
3016 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
3017 * @raid_dev - RAID device (HBA) soft state
3018 *
3019 * wait until the controller's mailbox is available to accept more commands.
3020 * wait for at most 1 second
3021 */
3022static int
3023megaraid_busywait_mbox(mraid_device_t *raid_dev)
3024{
3025 mbox_t *mbox = raid_dev->mbox;
3026 int i = 0;
3027
3028 if (mbox->busy) {
3029 udelay(25);
3030 for (i = 0; mbox->busy && i < 1000; i++)
3031 msleep(1);
3032 }
3033
3034 if (i < 1000) return 0;
3035 else return -1;
3036}
3037
3038
3039/**
3040 * megaraid_mbox_product_info - some static information about the controller
3041 * @adapter - our soft state
3042 *
3043 * issue commands to the controller to grab some parameters required by our
3044 * caller.
3045 */
3046static int
3047megaraid_mbox_product_info(adapter_t *adapter)
3048{
3049 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3050 mbox_t *mbox;
3051 uint8_t raw_mbox[sizeof(mbox_t)];
3052 mraid_pinfo_t *pinfo;
3053 dma_addr_t pinfo_dma_h;
3054 mraid_inquiry3_t *mraid_inq3;
3055 int i;
3056
3057
3058 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3059 mbox = (mbox_t *)raw_mbox;
3060
3061 /*
3062 * Issue an ENQUIRY3 command to find out certain adapter parameters,
3063 * e.g., max channels, max commands etc.
3064 */
3065 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3066 &pinfo_dma_h);
3067
3068 if (pinfo == NULL) {
3069 con_log(CL_ANN, (KERN_WARNING
3070 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3071 __LINE__));
3072
3073 return -1;
3074 }
3075 memset(pinfo, 0, sizeof(mraid_pinfo_t));
3076
3077 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3078 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3079
3080 raw_mbox[0] = FC_NEW_CONFIG;
3081 raw_mbox[2] = NC_SUBOP_ENQUIRY3;
3082 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
3083
3084 // Issue the command
3085 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3086
3087 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3088
3089 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3090 pinfo, pinfo_dma_h);
3091
3092 return -1;
3093 }
3094
3095 /*
3096 * Collect information about state of each physical drive
3097 * attached to the controller. We will expose all the disks
3098 * which are not part of RAID
3099 */
3100 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3101 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3102 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3103 }
3104
3105 /*
3106 * Get product info for information like number of channels,
3107 * maximum commands supported.
3108 */
3109 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3110 mbox->xferaddr = (uint32_t)pinfo_dma_h;
3111
3112 raw_mbox[0] = FC_NEW_CONFIG;
3113 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3114
3115 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3116
3117 con_log(CL_ANN, (KERN_WARNING
3118 "megaraid: product info failed\n"));
3119
3120 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3121 pinfo, pinfo_dma_h);
3122
3123 return -1;
3124 }
3125
3126 /*
3127 * Setup some parameters for host, as required by our caller
3128 */
3129 adapter->max_channel = pinfo->nchannels;
3130
3131 /*
3132 * we will export all the logical drives on a single channel.
3133 * Add 1 since inquires do not come for inititor ID
3134 */
3135 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1;
3136 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices
3137
3138 /*
3139 * These are the maximum outstanding commands for the scsi-layer
3140 */
3141 adapter->max_cmds = MBOX_MAX_SCSI_CMDS;
3142
3143 memset(adapter->fw_version, 0, VERSION_SIZE);
3144 memset(adapter->bios_version, 0, VERSION_SIZE);
3145
3146 memcpy(adapter->fw_version, pinfo->fw_version, 4);
3147 adapter->fw_version[4] = 0;
3148
3149 memcpy(adapter->bios_version, pinfo->bios_version, 4);
3150 adapter->bios_version[4] = 0;
3151
3152 con_log(CL_ANN, (KERN_NOTICE
3153 "megaraid: fw version:[%s] bios version:[%s]\n",
3154 adapter->fw_version, adapter->bios_version));
3155
3156 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3157 pinfo_dma_h);
3158
3159 return 0;
3160}
3161
3162
3163
3164/**
3165 * megaraid_mbox_extended_cdb - check for support for extended CDBs
3166 * @adapter - soft state for the controller
3167 *
3168 * this routine check whether the controller in question supports extended
3169 * ( > 10 bytes ) CDBs
3170 */
3171static int
3172megaraid_mbox_extended_cdb(adapter_t *adapter)
3173{
3174 mbox_t *mbox;
3175 uint8_t raw_mbox[sizeof(mbox_t)];
3176 int rval;
3177
3178 mbox = (mbox_t *)raw_mbox;
3179
3180 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3181 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3182
3183 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3184
3185 raw_mbox[0] = MAIN_MISC_OPCODE;
3186 raw_mbox[2] = SUPPORT_EXT_CDB;
3187
3188 /*
3189 * Issue the command
3190 */
3191 rval = 0;
3192 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3193 rval = -1;
3194 }
3195
3196 return rval;
3197}
3198
3199
3200/**
3201 * megaraid_mbox_support_ha - Do we support clustering
3202 * @adapter - soft state for the controller
3203 * @init_id - ID of the initiator
3204 *
3205 * Determine if the firmware supports clustering and the ID of the initiator.
3206 */
3207static int
3208megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3209{
3210 mbox_t *mbox;
3211 uint8_t raw_mbox[sizeof(mbox_t)];
3212 int rval;
3213
3214
3215 mbox = (mbox_t *)raw_mbox;
3216
3217 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3218
3219 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3220
3221 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3222
3223 raw_mbox[0] = GET_TARGET_ID;
3224
3225 // Issue the command
3226 *init_id = 7;
3227 rval = -1;
3228 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3229
3230 *init_id = *(uint8_t *)adapter->ibuf;
3231
3232 con_log(CL_ANN, (KERN_INFO
3233 "megaraid: cluster firmware, initiator ID: %d\n",
3234 *init_id));
3235
3236 rval = 0;
3237 }
3238
3239 return rval;
3240}
3241
3242
3243/**
3244 * megaraid_mbox_support_random_del - Do we support random deletion
3245 * @adapter - soft state for the controller
3246 *
3247 * Determine if the firmware supports random deletion
3248 * Return: 1 is operation supported, 0 otherwise
3249 */
3250static int
3251megaraid_mbox_support_random_del(adapter_t *adapter)
3252{
3253 mbox_t *mbox;
3254 uint8_t raw_mbox[sizeof(mbox_t)];
3255 int rval;
3256
3257
3258 mbox = (mbox_t *)raw_mbox;
3259
3260 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3261
3262 raw_mbox[0] = FC_DEL_LOGDRV;
3263 raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3264
3265 // Issue the command
3266 rval = 0;
3267 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3268
3269 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3270
3271 rval = 1;
3272 }
3273
3274 return rval;
3275}
3276
3277
3278/**
3279 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3280 * @adapter - soft state for the controller
3281 *
3282 * Find out the maximum number of scatter-gather elements supported by the
3283 * firmware
3284 */
3285static int
3286megaraid_mbox_get_max_sg(adapter_t *adapter)
3287{
3288 mbox_t *mbox;
3289 uint8_t raw_mbox[sizeof(mbox_t)];
3290 int nsg;
3291
3292
3293 mbox = (mbox_t *)raw_mbox;
3294
3295 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3296
3297 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3298
3299 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3300
3301 raw_mbox[0] = MAIN_MISC_OPCODE;
3302 raw_mbox[2] = GET_MAX_SG_SUPPORT;
3303
3304 // Issue the command
3305 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3306 nsg = *(uint8_t *)adapter->ibuf;
3307 }
3308 else {
3309 nsg = MBOX_DEFAULT_SG_SIZE;
3310 }
3311
3312 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3313
3314 return nsg;
3315}
3316
3317
3318/**
3319 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3320 * @adapter - soft state for the controller
3321 *
3322 * Enumerate the RAID and SCSI channels for ROMB platoforms so that channels
3323 * can be exported as regular SCSI channels
3324 */
3325static void
3326megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3327{
3328 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3329 mbox_t *mbox;
3330 uint8_t raw_mbox[sizeof(mbox_t)];
3331
3332
3333 mbox = (mbox_t *)raw_mbox;
3334
3335 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3336
3337 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3338
3339 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3340
3341 raw_mbox[0] = CHNL_CLASS;
3342 raw_mbox[2] = GET_CHNL_CLASS;
3343
3344 // Issue the command. If the command fails, all channels are RAID
3345 // channels
3346 raid_dev->channel_class = 0xFF;
3347 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3348 raid_dev->channel_class = *(uint8_t *)adapter->ibuf;
3349 }
3350
3351 return;
3352}
3353
3354
3355/**
3356 * megaraid_mbox_flush_cache - flush adapter and disks cache
3357 * @param adapter : soft state for the controller
3358 *
3359 * Flush adapter cache followed by disks cache
3360 */
3361static void
3362megaraid_mbox_flush_cache(adapter_t *adapter)
3363{
3364 mbox_t *mbox;
3365 uint8_t raw_mbox[sizeof(mbox_t)];
3366
3367
3368 mbox = (mbox_t *)raw_mbox;
3369
3370 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3371
3372 raw_mbox[0] = FLUSH_ADAPTER;
3373
3374 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3375 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3376 }
3377
3378 raw_mbox[0] = FLUSH_SYSTEM;
3379
3380 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3381 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3382 }
3383
3384 return;
3385}
3386
3387
cd96d96f
SP		 3388/**
3389 * megaraid_mbox_fire_sync_cmd - fire the sync cmd
3390 * @param adapter : soft state for the controller
3391 *
3392 * Clears the pending cmds in FW and reinits its RAID structs
3393 */
3394static int
3395megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3396{
3397 mbox_t *mbox;
3398 uint8_t raw_mbox[sizeof(mbox_t)];
3399 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3400 mbox64_t *mbox64;
3401 int status = 0;
3402 int i;
3403 uint32_t dword;
3404
3405 mbox = (mbox_t *)raw_mbox;
3406
3407 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3408
3409 raw_mbox[0] = 0xFF;
3410
3411 mbox64 = raid_dev->mbox64;
3412 mbox = raid_dev->mbox;
3413
3414 /* Wait until mailbox is free */
3415 if (megaraid_busywait_mbox(raid_dev) != 0) {
3416 status = 1;
3417 goto blocked_mailbox;
3418 }
3419
3420 /* Copy mailbox data into host structure */
3421 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3422 mbox->cmdid = 0xFE;
3423 mbox->busy = 1;
3424 mbox->poll = 0;
3425 mbox->ack = 0;
3426 mbox->numstatus = 0;
3427 mbox->status = 0;
3428
3429 wmb();
3430 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3431
3432 /* Wait for maximum 1 min for status to post.
3433 * If the Firmware SUPPORTS the ABOVE COMMAND,
3434 * mbox->cmd will be set to 0
3435 * else
3436 * the firmware will reject the command with
3437 * mbox->numstatus set to 1
3438 */
3439
3440 i = 0;
3441 status = 0;
3442 while (!mbox->numstatus && mbox->cmd == 0xFF) {
3443 rmb();
3444 msleep(1);
3445 i++;
3446 if (i > 1000 * 60) {
3447 status = 1;
3448 break;
3449 }
3450 }
3451 if (mbox->numstatus == 1)
3452 status = 1; /*cmd not supported*/
3453
3454 /* Check for interrupt line */
3455 dword = RDOUTDOOR(raid_dev);
3456 WROUTDOOR(raid_dev, dword);
3457 WRINDOOR(raid_dev,2);
3458
3459 return status;
3460
3461blocked_mailbox:
3462 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3463 return status;
3464}
3465
1da177e4
LT		 3466/**
3467 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3468 * @param adapter : controllers' soft state
3469 * @param scb : SCB to be displayed
3470 * @param level : debug level for console print
3471 *
3472 * Diplay information about the given SCB iff the current debug level is
3473 * verbose
3474 */
3475static void
3476megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3477{
3478 mbox_ccb_t *ccb;
3479 struct scsi_cmnd *scp;
3480 mbox_t *mbox;
3481 int level;
3482 int i;
3483
3484
3485 ccb = (mbox_ccb_t *)scb->ccb;
3486 scp = scb->scp;
3487 mbox = ccb->mbox;
3488
3489 level = CL_DLEVEL3;
3490
3491 con_log(level, (KERN_NOTICE
3492 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3493 mbox->cmd, scb->sno));
3494
3495 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3496 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3497 mbox->numsge));
3498
3499 if (!scp) return;
3500
3501 con_log(level, (KERN_NOTICE "scsi cmnd: "));
3502
3503 for (i = 0; i < scp->cmd_len; i++) {
3504 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3505 }
3506
3507 con_log(level, ("\n"));
3508
3509 return;
3510}
3511
3512
3513/**
3514 * megaraid_mbox_setup_device_map - manage device ids
3515 * @adapter : Driver's soft state
3516 *
3517 * Manange the device ids to have an appropraite mapping between the kernel
3518 * scsi addresses and megaraid scsi and logical drive addresses. We export
3519 * scsi devices on their actual addresses, whereas the logical drives are
3520 * exported on a virtual scsi channel.
3521 **/
3522static void
3523megaraid_mbox_setup_device_map(adapter_t *adapter)
3524{
3525 uint8_t c;
3526 uint8_t t;
3527
3528 /*
3529 * First fill the values on the logical drive channel
3530 */
3531 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3532 adapter->device_ids[adapter->max_channel][t] =
3533 (t < adapter->init_id) ? t : t - 1;
3534
3535 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3536
3537 /*
3538 * Fill the values on the physical devices channels
3539 */
3540 for (c = 0; c < adapter->max_channel; c++)
3541 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3542 adapter->device_ids[c][t] = (c << 8) | t;
3543}
3544
3545
3546/*
3547 * END: internal commands library
3548 */
3549
3550/*
3551 * START: Interface for the common management module
3552 *
3553 * This is the module, which interfaces with the common mangement module to
3554 * provide support for ioctl and sysfs
3555 */
3556
3557/**
3558 * megaraid_cmm_register - register with the mangement module
3559 * @param adapter : HBA soft state
3560 *
3561 * Register with the management module, which allows applications to issue
3562 * ioctl calls to the drivers. This interface is used by the management module
3563 * to setup sysfs support as well.
3564 */
3565static int
3566megaraid_cmm_register(adapter_t *adapter)
3567{
3568 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3569 mraid_mmadp_t adp;
3570 scb_t *scb;
3571 mbox_ccb_t *ccb;
3572 int rval;
3573 int i;
3574
3575 // Allocate memory for the base list of scb for management module.
3576 adapter->uscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_USER_CMDS,
3577 GFP_KERNEL);
3578
3579 if (adapter->uscb_list == NULL) {
3580 con_log(CL_ANN, (KERN_WARNING
3581 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3582 __LINE__));
3583 return -1;
3584 }
3585 memset(adapter->uscb_list, 0, sizeof(scb_t) * MBOX_MAX_USER_CMDS);
3586
3587
3588 // Initialize the synchronization parameters for resources for
3589 // commands for management module
3590 INIT_LIST_HEAD(&adapter->uscb_pool);
3591
3592 spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3593
3594
3595
3596 // link all the packets. Note, CCB for commands, coming from the
3597 // commom management module, mailbox physical address are already
3598 // setup by it. We just need placeholder for that in our local command
3599 // control blocks
3600 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3601
3602 scb = adapter->uscb_list + i;
3603 ccb = raid_dev->uccb_list + i;
3604
3605 scb->ccb = (caddr_t)ccb;
3606 ccb->mbox64 = raid_dev->umbox64 + i;
3607 ccb->mbox = &ccb->mbox64->mbox32;
3608 ccb->raw_mbox = (uint8_t *)ccb->mbox;
3609
3610 scb->gp = 0;
3611
3612 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3613 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3614 scb->sno = i + MBOX_MAX_SCSI_CMDS;
3615
3616 scb->scp = NULL;
3617 scb->state = SCB_FREE;
3618 scb->dma_direction = PCI_DMA_NONE;
3619 scb->dma_type = MRAID_DMA_NONE;
3620 scb->dev_channel = -1;
3621 scb->dev_target = -1;
3622
3623 // put scb in the free pool
3624 list_add_tail(&scb->list, &adapter->uscb_pool);
3625 }
3626
3627 adp.unique_id = adapter->unique_id;
3628 adp.drvr_type = DRVRTYPE_MBOX;
3629 adp.drvr_data = (unsigned long)adapter;
3630 adp.pdev = adapter->pdev;
3631 adp.issue_uioc = megaraid_mbox_mm_handler;
c005fb4f 3632 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
1da177e4
LT		 3633 adp.max_kioc = MBOX_MAX_USER_CMDS;
3634
3635 if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3636
3637 con_log(CL_ANN, (KERN_WARNING
3638 "megaraid mbox: did not register with CMM\n"));
3639
3640 kfree(adapter->uscb_list);
3641 }
3642
3643 return rval;
3644}
3645
3646
3647/**
3648 * megaraid_cmm_unregister - un-register with the mangement module
3649 * @param adapter : HBA soft state
3650 *
3651 * Un-register with the management module.
3652 * FIXME: mgmt module must return failure for unregister if it has pending
3653 * commands in LLD
3654 */
3655static int
3656megaraid_cmm_unregister(adapter_t *adapter)
3657{
3658 kfree(adapter->uscb_list);
3659 mraid_mm_unregister_adp(adapter->unique_id);
3660 return 0;
3661}
3662
3663
3664/**
3665 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3666 * @param drvr_data : LLD specific data
3667 * @param kioc : CMM interface packet
3668 * @param action : command action
3669 *
3670 * This routine is invoked whenever the Common Mangement Module (CMM) has a
3671 * command for us. The 'action' parameter specifies if this is a new command
3672 * or otherwise.
3673 */
3674static int
3675megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3676{
3677 adapter_t *adapter;
3678
3679 if (action != IOCTL_ISSUE) {
3680 con_log(CL_ANN, (KERN_WARNING
3681 "megaraid: unsupported management action:%#2x\n",
3682 action));
3683 return (-ENOTSUPP);
3684 }
3685
3686 adapter = (adapter_t *)drvr_data;
3687
3688 // make sure this adapter is not being detached right now.
3689 if (atomic_read(&adapter->being_detached)) {
3690 con_log(CL_ANN, (KERN_WARNING
3691 "megaraid: reject management request, detaching\n"));
3692 return (-ENODEV);
3693 }
3694
3695 switch (kioc->opcode) {
3696
3697 case GET_ADAP_INFO:
3698
3699 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *)
3700 (unsigned long)kioc->buf_vaddr);
3701
3702 kioc->done(kioc);
3703
3704 return kioc->status;
3705
3706 case MBOX_CMD:
3707
3708 return megaraid_mbox_mm_command(adapter, kioc);
3709
3710 default:
3711 kioc->status = (-EINVAL);
3712 kioc->done(kioc);
3713 return (-EINVAL);
3714 }
3715
3716 return 0; // not reached
3717}
3718
3719/**
3720 * megaraid_mbox_mm_command - issues commands routed through CMM
3721 * @param adapter : HBA soft state
3722 * @param kioc : management command packet
3723 *
3724 * Issues commands, which are routed through the management module.
3725 */
3726static int
3727megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3728{
3729 struct list_head *head = &adapter->uscb_pool;
3730 mbox64_t *mbox64;
3731 uint8_t *raw_mbox;
3732 scb_t *scb;
3733 mbox_ccb_t *ccb;
3734 unsigned long flags;
3735
3736 // detach one scb from free pool
3737 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3738
3739 if (list_empty(head)) { // should never happen because of CMM
3740
3741 con_log(CL_ANN, (KERN_WARNING
3742 "megaraid mbox: bug in cmm handler, lost resources\n"));
3743
3744 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3745
3746 return (-EINVAL);
3747 }
3748
3749 scb = list_entry(head->next, scb_t, list);
3750 list_del_init(&scb->list);
3751
3752 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3753
3754 scb->state = SCB_ACTIVE;
3755 scb->dma_type = MRAID_DMA_NONE;
3756 scb->dma_direction = PCI_DMA_NONE;
3757
3758 ccb = (mbox_ccb_t *)scb->ccb;
3759 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3760 raw_mbox = (uint8_t *)&mbox64->mbox32;
3761
3762 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3763
3764 scb->gp = (unsigned long)kioc;
3765
3766 /*
3767 * If it is a logdrv random delete operation, we have to wait till
3768 * there are no outstanding cmds at the fw and then issue it directly
3769 */
3770 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3771
3772 if (wait_till_fw_empty(adapter)) {
3773 con_log(CL_ANN, (KERN_NOTICE
3774 "megaraid mbox: LD delete, timed out\n"));
3775
3776 kioc->status = -ETIME;
3777
3778 scb->status = -1;
3779
3780 megaraid_mbox_mm_done(adapter, scb);
3781
3782 return (-ETIME);
3783 }
3784
3785 INIT_LIST_HEAD(&scb->list);
3786
3787 scb->state = SCB_ISSUED;
3788 if (mbox_post_cmd(adapter, scb) != 0) {
3789
3790 con_log(CL_ANN, (KERN_NOTICE
3791 "megaraid mbox: LD delete, mailbox busy\n"));
3792
3793 kioc->status = -EBUSY;
3794
3795 scb->status = -1;
3796
3797 megaraid_mbox_mm_done(adapter, scb);
3798
3799 return (-EBUSY);
3800 }
3801
3802 return 0;
3803 }
3804
3805 // put the command on the pending list and execute
3806 megaraid_mbox_runpendq(adapter, scb);
3807
3808 return 0;
3809}
3810
3811
3812static int
3813wait_till_fw_empty(adapter_t *adapter)
3814{
3815 unsigned long flags = 0;
3816 int i;
3817
3818
3819 /*
3820 * Set the quiescent flag to stop issuing cmds to FW.
3821 */
f2c8dc40 3822 spin_lock_irqsave(&adapter->lock, flags);
1da177e4 3823 adapter->quiescent++;
f2c8dc40 3824 spin_unlock_irqrestore(&adapter->lock, flags);
1da177e4
LT		 3825
3826 /*
3827 * Wait till there are no more cmds outstanding at FW. Try for at most
3828 * 60 seconds
3829 */
3830 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3831 con_log(CL_DLEVEL1, (KERN_INFO
3832 "megaraid: FW has %d pending commands\n",
3833 adapter->outstanding_cmds));
3834
3835 msleep(1000);
3836 }
3837
3838 return adapter->outstanding_cmds;
3839}
3840
3841
3842/**
3843 * megaraid_mbox_mm_done - callback for CMM commands
3844 * @adapter : HBA soft state
3845 * @scb : completed command
3846 *
3847 * Callback routine for internal commands originated from the management
3848 * module.
3849 */
3850static void
3851megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3852{
3853 uioc_t *kioc;
3854 mbox64_t *mbox64;
3855 uint8_t *raw_mbox;
3856 unsigned long flags;
3857
3858 kioc = (uioc_t *)scb->gp;
1da177e4
LT		 3859 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3860 mbox64->mbox32.status = scb->status;
3861 raw_mbox = (uint8_t *)&mbox64->mbox32;
3862
3863
3864 // put scb in the free pool
3865 scb->state = SCB_FREE;
3866 scb->scp = NULL;
3867
3868 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3869
3870 list_add(&scb->list, &adapter->uscb_pool);
3871
3872 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3873
3874 // if a delete logical drive operation succeeded, restart the
3875 // controller
3876 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3877
3878 adapter->quiescent--;
3879
3880 megaraid_mbox_runpendq(adapter, NULL);
3881 }
3882
3883 kioc->done(kioc);
3884
3885 return;
3886}
3887
3888
3889/**
3890 * gather_hbainfo - HBA characteristics for the applications
3891 * @param adapter : HBA soft state
3892 * @param hinfo : pointer to the caller's host info strucuture
3893 */
3894static int
3895gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3896{
3897 uint8_t dmajor;
3898
3899 dmajor = megaraid_mbox_version[0];
3900
3901 hinfo->pci_vendor_id = adapter->pdev->vendor;
3902 hinfo->pci_device_id = adapter->pdev->device;
3903 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3904 hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3905
3906 hinfo->pci_bus = adapter->pdev->bus->number;
3907 hinfo->pci_dev_fn = adapter->pdev->devfn;
3908 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn);
3909 hinfo->irq = adapter->host->irq;
3910 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport;
3911
3912 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3913 hinfo->host_no = adapter->host->host_no;
3914
3915 return 0;
3916}
3917
3918/*
3919 * END: Interface for the common management module
3920 */
3921
3922
3923
3924/**
3925 * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3926 *
3927 * Allocate packets required to issue FW calls whenever the sysfs attributes
3928 * are read. These attributes would require up-to-date information from the
3929 * FW. Also set up resources for mutual exclusion to share these resources and
3930 * the wait queue.
3931 *
3932 * @param adapter : controller's soft state
3933 *
3934 * @return 0 on success
3935 * @return -ERROR_CODE on failure
3936 */
3937static int
3938megaraid_sysfs_alloc_resources(adapter_t *adapter)
3939{
3940 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3941 int rval = 0;
3942
3943 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3944
3945 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3946
3947 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3948 PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3949
3950 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3951 !raid_dev->sysfs_buffer) {
3952
3953 con_log(CL_ANN, (KERN_WARNING
3954 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3955 __LINE__));
3956
3957 rval = -ENOMEM;
3958
3959 megaraid_sysfs_free_resources(adapter);
3960 }
3961
3962 sema_init(&raid_dev->sysfs_sem, 1);
3963
3964 init_waitqueue_head(&raid_dev->sysfs_wait_q);
3965
3966 return rval;
3967}
3968
3969
3970/**
3971 * megaraid_sysfs_free_resources - free sysfs related resources
3972 *
3973 * Free packets allocated for sysfs FW commands
3974 *
3975 * @param adapter : controller's soft state
3976 */
3977static void
3978megaraid_sysfs_free_resources(adapter_t *adapter)
3979{
3980 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3981
c9475cb0
JJ		 3982 kfree(raid_dev->sysfs_uioc);
3983 kfree(raid_dev->sysfs_mbox64);
1da177e4
LT		 3984
3985 if (raid_dev->sysfs_buffer) {
3986 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3987 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3988 }
3989}
3990
3991
3992/**
3993 * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3994 *
3995 * Callback routine called in the ISR/tasklet context for get ldmap call
3996 *
3997 * @param uioc : completed packet
3998 */
3999static void
4000megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
4001{
4002 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
4003 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4004
4005 uioc->status = 0;
4006
4007 wake_up(&raid_dev->sysfs_wait_q);
4008}
4009
4010
4011/**
4012 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
4013 *
4014 * Timeout routine to recover and return to application, in case the adapter
4015 * has stopped responding. A timeout of 60 seconds for this command seem like
4016 * a good value
4017 *
4018 * @param uioc : timed out packet
4019 */
4020static void
4021megaraid_sysfs_get_ldmap_timeout(unsigned long data)
4022{
4023 uioc_t *uioc = (uioc_t *)data;
4024 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
4025 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4026
4027 uioc->status = -ETIME;
4028
4029 wake_up(&raid_dev->sysfs_wait_q);
4030}
4031
4032
4033/**
4034 * megaraid_sysfs_get_ldmap - get update logical drive map
4035 *
4036 * This routine will be called whenever user reads the logical drive
4037 * attributes, go get the current logical drive mapping table from the
4038 * firmware. We use the managment API's to issue commands to the controller.
4039 *
4040 * NOTE: The commands issuance functionality is not generalized and
4041 * implemented in context of "get ld map" command only. If required, the
4042 * command issuance logical can be trivially pulled out and implemented as a
4043 * standalone libary. For now, this should suffice since there is no other
4044 * user of this interface.
4045 *
4046 * @param adapter : controller's soft state
4047 *
4048 * @return 0 on success
4049 * @return -1 on failure
4050 */
4051static int
4052megaraid_sysfs_get_ldmap(adapter_t *adapter)
4053{
4054 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4055 uioc_t *uioc;
4056 mbox64_t *mbox64;
4057 mbox_t *mbox;
4058 char *raw_mbox;
4059 struct timer_list sysfs_timer;
4060 struct timer_list *timerp;
4061 caddr_t ldmap;
4062 int rval = 0;
4063
4064 /*
4065 * Allow only one read at a time to go through the sysfs attributes
4066 */
4067 down(&raid_dev->sysfs_sem);
4068
4069 uioc = raid_dev->sysfs_uioc;
4070 mbox64 = raid_dev->sysfs_mbox64;
4071 ldmap = raid_dev->sysfs_buffer;
4072
4073 memset(uioc, 0, sizeof(uioc_t));
4074 memset(mbox64, 0, sizeof(mbox64_t));
4075 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
4076
4077 mbox = &mbox64->mbox32;
4078 raw_mbox = (char *)mbox;
4079 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64;
4080 uioc->buf_vaddr = (caddr_t)adapter;
4081 uioc->status = -ENODATA;
4082 uioc->done = megaraid_sysfs_get_ldmap_done;
4083
4084 /*
4085 * Prepare the mailbox packet to get the current logical drive mapping
4086 * table
4087 */
4088 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
4089
4090 raw_mbox[0] = FC_DEL_LOGDRV;
4091 raw_mbox[2] = OP_GET_LDID_MAP;
4092
4093 /*
4094 * Setup a timer to recover from a non-responding controller
4095 */
4096 timerp = &sysfs_timer;
4097 init_timer(timerp);
4098
4099 timerp->function = megaraid_sysfs_get_ldmap_timeout;
4100 timerp->data = (unsigned long)uioc;
4101 timerp->expires = jiffies + 60 * HZ;
4102
4103 add_timer(timerp);
4104
4105 /*
4106 * Send the command to the firmware
4107 */
4108 rval = megaraid_mbox_mm_command(adapter, uioc);
4109
4110 if (rval == 0) { // command successfully issued
4111 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4112
4113 /*
4114 * Check if the command timed out
4115 */
4116 if (uioc->status == -ETIME) {
4117 con_log(CL_ANN, (KERN_NOTICE
4118 "megaraid: sysfs get ld map timed out\n"));
4119
4120 rval = -ETIME;
4121 }
4122 else {
4123 rval = mbox->status;
4124 }
4125
4126 if (rval == 0) {
4127 memcpy(raid_dev->curr_ldmap, ldmap,
4128 sizeof(raid_dev->curr_ldmap));
4129 }
4130 else {
4131 con_log(CL_ANN, (KERN_NOTICE
4132 "megaraid: get ld map failed with %x\n", rval));
4133 }
4134 }
4135 else {
4136 con_log(CL_ANN, (KERN_NOTICE
4137 "megaraid: could not issue ldmap command:%x\n", rval));
4138 }
4139
4140
4141 del_timer_sync(timerp);
4142
4143 up(&raid_dev->sysfs_sem);
4144
4145 return rval;
4146}
4147
4148
4149/**
4150 * megaraid_sysfs_show_app_hndl - display application handle for this adapter
4151 *
4152 * Display the handle used by the applications while executing management
4153 * tasks on the adapter. We invoke a management module API to get the adapter
4154 * handle, since we do not interface with applications directly.
4155 *
4156 * @param cdev : class device object representation for the host
4157 * @param buf : buffer to send data to
4158 */
4159static ssize_t
4160megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf)
4161{
4162 struct Scsi_Host *shost = class_to_shost(cdev);
4163 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4164 uint32_t app_hndl;
4165
4166 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4167
4168 return snprintf(buf, 8, "%u\n", app_hndl);
4169}
4170
4171
4172/**
4173 * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4174 *
4175 * Display the logical drive number for the device in question, if it a valid
4176 * logical drive. For physical devices, "-1" is returned
4177 * The logical drive number is displayed in following format
4178 *
4179 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4180 * <int> <int> <int> <int>
4181 *
4182 * @param dev : device object representation for the scsi device
4183 * @param buf : buffer to send data to
4184 */
4185static ssize_t
10523b3b 4186megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 4187{
4188 struct scsi_device *sdev = to_scsi_device(dev);
4189 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4190 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4191 int scsi_id = -1;
4192 int logical_drv = -1;
4193 int ldid_map = -1;
4194 uint32_t app_hndl = 0;
4195 int mapped_sdev_id;
4196 int rval;
4197 int i;
4198
4199 if (raid_dev->random_del_supported &&
4200 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4201
4202 rval = megaraid_sysfs_get_ldmap(adapter);
4203 if (rval == 0) {
4204
4205 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4206
4207 mapped_sdev_id = sdev->id;
4208
4209 if (sdev->id > adapter->init_id) {
4210 mapped_sdev_id -= 1;
4211 }
4212
4213 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4214
4215 scsi_id = sdev->id;
4216
4217 logical_drv = i;
4218
4219 ldid_map = raid_dev->curr_ldmap[i];
4220
4221 app_hndl = mraid_mm_adapter_app_handle(
4222 adapter->unique_id);
4223
4224 break;
4225 }
4226 }
4227 }
4228 else {
4229 con_log(CL_ANN, (KERN_NOTICE
4230 "megaraid: sysfs get ld map failed: %x\n",
4231 rval));
4232 }
4233 }
4234
4235 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4236 ldid_map, app_hndl);
4237}
4238
4239
4240/*
4241 * END: Mailbox Low Level Driver
4242 */
4243module_init(megaraid_init);
4244module_exit(megaraid_exit);
4245
4246/* vim: set ts=8 sw=8 tw=78 ai si: */
Clone of davem's net-next-2.6 tree