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Linux 2.6.17.7
[linux/fpc-iii.git] / drivers / scsi / megaraid / megaraid_mbox.c
blobbec1424eda850f0f5b121ed9e6fcb15c10506a7b
1 /*
2 *
3 * Linux MegaRAID device driver
4 *
5 * Copyright (c) 2003-2004 LSI Logic Corporation.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 *
12 * FILE : megaraid_mbox.c
13 * Version : v2.20.4.8 (Apr 11 2006)
14 *
15 * Authors:
16 * Atul Mukker <Atul.Mukker@lsil.com>
17 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsil.com>
18 * Manoj Jose <Manoj.Jose@lsil.com>
19 * Seokmann Ju <Seokmann.Ju@lsil.com>
20 *
21 * List of supported controllers
22 *
23 * OEM Product Name VID DID SSVID SSID
24 * --- ------------ --- --- ---- ----
25 * Dell PERC3/QC 101E 1960 1028 0471
26 * Dell PERC3/DC 101E 1960 1028 0493
27 * Dell PERC3/SC 101E 1960 1028 0475
28 * Dell PERC3/Di 1028 1960 1028 0123
29 * Dell PERC4/SC 1000 1960 1028 0520
30 * Dell PERC4/DC 1000 1960 1028 0518
31 * Dell PERC4/QC 1000 0407 1028 0531
32 * Dell PERC4/Di 1028 000F 1028 014A
33 * Dell PERC 4e/Si 1028 0013 1028 016c
34 * Dell PERC 4e/Di 1028 0013 1028 016d
35 * Dell PERC 4e/Di 1028 0013 1028 016e
36 * Dell PERC 4e/Di 1028 0013 1028 016f
37 * Dell PERC 4e/Di 1028 0013 1028 0170
38 * Dell PERC 4e/DC 1000 0408 1028 0002
39 * Dell PERC 4e/SC 1000 0408 1028 0001
40 *
41 *
42 * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520
43 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520
44 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518
45 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530
46 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532
47 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531
48 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001
49 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002
50 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523
51 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523
52 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004
53 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008
54 *
55 * INTEL RAID Controller SRCU42X 1000 0407 8086 0532
56 * INTEL RAID Controller SRCS16 1000 1960 8086 0523
57 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002
58 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530
59 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008
60 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431
61 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499
62 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520
63 *
64 * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065
65 *
66 * ACER MegaRAID ROMB-2E 1000 0408 1025 004D
67 *
68 * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287
69 *
70 * For history of changes, see Documentation/ChangeLog.megaraid
71 */
72
73 #include "megaraid_mbox.h"
74
75 static int megaraid_init(void);
76 static void megaraid_exit(void);
77
78 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
79 static void megaraid_detach_one(struct pci_dev *);
80 static void megaraid_mbox_shutdown(struct pci_dev *);
81
82 static int megaraid_io_attach(adapter_t *);
83 static void megaraid_io_detach(adapter_t *);
84
85 static int megaraid_init_mbox(adapter_t *);
86 static void megaraid_fini_mbox(adapter_t *);
87
88 static int megaraid_alloc_cmd_packets(adapter_t *);
89 static void megaraid_free_cmd_packets(adapter_t *);
90
91 static int megaraid_mbox_setup_dma_pools(adapter_t *);
92 static void megaraid_mbox_teardown_dma_pools(adapter_t *);
93
94 static int megaraid_sysfs_alloc_resources(adapter_t *);
95 static void megaraid_sysfs_free_resources(adapter_t *);
96
97 static int megaraid_abort_handler(struct scsi_cmnd *);
98 static int megaraid_reset_handler(struct scsi_cmnd *);
99
100 static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
101 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
102 static int megaraid_busywait_mbox(mraid_device_t *);
103 static int megaraid_mbox_product_info(adapter_t *);
104 static int megaraid_mbox_extended_cdb(adapter_t *);
105 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
106 static int megaraid_mbox_support_random_del(adapter_t *);
107 static int megaraid_mbox_get_max_sg(adapter_t *);
108 static void megaraid_mbox_enum_raid_scsi(adapter_t *);
109 static void megaraid_mbox_flush_cache(adapter_t *);
110
111 static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
112 static void megaraid_mbox_setup_device_map(adapter_t *);
113
114 static int megaraid_queue_command(struct scsi_cmnd *,
115 void (*)(struct scsi_cmnd *));
116 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
117 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
118 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
119 struct scsi_cmnd *);
120 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
121 struct scsi_cmnd *);
122
123 static irqreturn_t megaraid_isr(int, void *, struct pt_regs *);
124
125 static void megaraid_mbox_dpc(unsigned long);
126
127 static ssize_t megaraid_sysfs_show_app_hndl(struct class_device *, char *);
128 static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *);
129
130 static int megaraid_cmm_register(adapter_t *);
131 static int megaraid_cmm_unregister(adapter_t *);
132 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
133 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
134 static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
135 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
136 static int wait_till_fw_empty(adapter_t *);
137
138
139
140 MODULE_AUTHOR("sju@lsil.com");
141 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
142 MODULE_LICENSE("GPL");
143 MODULE_VERSION(MEGARAID_VERSION);
144
145 /*
146 * ### modules parameters for driver ###
147 */
148
149 /**
150 * Set to enable driver to expose unconfigured disk to kernel
151 */
152 static int megaraid_expose_unconf_disks = 0;
153 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
154 MODULE_PARM_DESC(unconf_disks,
155 "Set to expose unconfigured disks to kernel (default=0)");
156
157 /**
158 * driver wait time if the adapter's mailbox is busy
159 */
160 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
161 module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
162 MODULE_PARM_DESC(busy_wait,
163 "Max wait for mailbox in microseconds if busy (default=10)");
164
165 /**
166 * number of sectors per IO command
167 */
168 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
169 module_param_named(max_sectors, megaraid_max_sectors, int, 0);
170 MODULE_PARM_DESC(max_sectors,
171 "Maximum number of sectors per IO command (default=128)");
172
173 /**
174 * number of commands per logical unit
175 */
176 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
177 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
178 MODULE_PARM_DESC(cmd_per_lun,
179 "Maximum number of commands per logical unit (default=64)");
180
181
182 /**
183 * Fast driver load option, skip scanning for physical devices during load.
184 * This would result in non-disk devices being skipped during driver load
185 * time. These can be later added though, using /proc/scsi/scsi
186 */
187 static unsigned int megaraid_fast_load = 0;
188 module_param_named(fast_load, megaraid_fast_load, int, 0);
189 MODULE_PARM_DESC(fast_load,
190 "Faster loading of the driver, skips physical devices! (default=0)");
191
192
193 /**
194 * mraid_debug level - threshold for amount of information to be displayed by
195 * the driver. This level can be changed through modules parameters, ioctl or
196 * sysfs/proc interface. By default, print the announcement messages only.
197 */
198 int mraid_debug_level = CL_ANN;
199 module_param_named(debug_level, mraid_debug_level, int, 0);
200 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
201
202 /*
203 * ### global data ###
204 */
205 static uint8_t megaraid_mbox_version[8] =
206 { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 };
207
208
209 /*
210 * PCI table for all supported controllers.
211 */
212 static struct pci_device_id pci_id_table_g[] = {
213 {
214 PCI_VENDOR_ID_DELL,
215 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
216 PCI_VENDOR_ID_DELL,
217 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
218 },
219 {
220 PCI_VENDOR_ID_LSI_LOGIC,
221 PCI_DEVICE_ID_PERC4_SC,
222 PCI_VENDOR_ID_DELL,
223 PCI_SUBSYS_ID_PERC4_SC,
224 },
225 {
226 PCI_VENDOR_ID_LSI_LOGIC,
227 PCI_DEVICE_ID_PERC4_DC,
228 PCI_VENDOR_ID_DELL,
229 PCI_SUBSYS_ID_PERC4_DC,
230 },
231 {
232 PCI_VENDOR_ID_LSI_LOGIC,
233 PCI_DEVICE_ID_VERDE,
234 PCI_ANY_ID,
235 PCI_ANY_ID,
236 },
237 {
238 PCI_VENDOR_ID_DELL,
239 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
240 PCI_VENDOR_ID_DELL,
241 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
242 },
243 {
244 PCI_VENDOR_ID_DELL,
245 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
246 PCI_VENDOR_ID_DELL,
247 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
248 },
249 {
250 PCI_VENDOR_ID_DELL,
251 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
252 PCI_VENDOR_ID_DELL,
253 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
254 },
255 {
256 PCI_VENDOR_ID_DELL,
257 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
258 PCI_VENDOR_ID_DELL,
259 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
260 },
261 {
262 PCI_VENDOR_ID_DELL,
263 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
264 PCI_VENDOR_ID_DELL,
265 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
266 },
267 {
268 PCI_VENDOR_ID_DELL,
269 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
270 PCI_VENDOR_ID_DELL,
271 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
272 },
273 {
274 PCI_VENDOR_ID_LSI_LOGIC,
275 PCI_DEVICE_ID_DOBSON,
276 PCI_ANY_ID,
277 PCI_ANY_ID,
278 },
279 {
280 PCI_VENDOR_ID_AMI,
281 PCI_DEVICE_ID_AMI_MEGARAID3,
282 PCI_ANY_ID,
283 PCI_ANY_ID,
284 },
285 {
286 PCI_VENDOR_ID_LSI_LOGIC,
287 PCI_DEVICE_ID_AMI_MEGARAID3,
288 PCI_ANY_ID,
289 PCI_ANY_ID,
290 },
291 {
292 PCI_VENDOR_ID_LSI_LOGIC,
293 PCI_DEVICE_ID_LINDSAY,
294 PCI_ANY_ID,
295 PCI_ANY_ID,
296 },
297 {0} /* Terminating entry */
298 };
299 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
300
301
302 static struct pci_driver megaraid_pci_driver_g = {
303 .name = "megaraid",
304 .id_table = pci_id_table_g,
305 .probe = megaraid_probe_one,
306 .remove = __devexit_p(megaraid_detach_one),
307 .shutdown = megaraid_mbox_shutdown,
308 };
309
310
311
312 // definitions for the device attributes for exporting logical drive number
313 // for a scsi address (Host, Channel, Id, Lun)
314
315 CLASS_DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
316 NULL);
317
318 // Host template initializer for megaraid mbox sysfs device attributes
319 static struct class_device_attribute *megaraid_shost_attrs[] = {
320 &class_device_attr_megaraid_mbox_app_hndl,
321 NULL,
322 };
323
324
325 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
326
327 // Host template initializer for megaraid mbox sysfs device attributes
328 static struct device_attribute *megaraid_sdev_attrs[] = {
329 &dev_attr_megaraid_mbox_ld,
330 NULL,
331 };
332
333
334 /*
335 * Scsi host template for megaraid unified driver
336 */
337 static struct scsi_host_template megaraid_template_g = {
338 .module = THIS_MODULE,
339 .name = "LSI Logic MegaRAID driver",
340 .proc_name = "megaraid",
341 .queuecommand = megaraid_queue_command,
342 .eh_abort_handler = megaraid_abort_handler,
343 .eh_device_reset_handler = megaraid_reset_handler,
344 .eh_bus_reset_handler = megaraid_reset_handler,
345 .eh_host_reset_handler = megaraid_reset_handler,
346 .use_clustering = ENABLE_CLUSTERING,
347 .sdev_attrs = megaraid_sdev_attrs,
348 .shost_attrs = megaraid_shost_attrs,
349 };
350
351
352 /**
353 * megaraid_init - module load hook
354 *
355 * We register ourselves as hotplug enabled module and let PCI subsystem
356 * discover our adaters
357 **/
358 static int __init
359 megaraid_init(void)
360 {
361 int rval;
362
363 // Announce the driver version
364 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
365 MEGARAID_EXT_VERSION));
366
367 // check validity of module parameters
368 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
369
370 con_log(CL_ANN, (KERN_WARNING
371 "megaraid mailbox: max commands per lun reset to %d\n",
372 MBOX_MAX_SCSI_CMDS));
373
374 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
375 }
376
377
378 // register as a PCI hot-plug driver module
379 rval = pci_register_driver(&megaraid_pci_driver_g);
380 if (rval < 0) {
381 con_log(CL_ANN, (KERN_WARNING
382 "megaraid: could not register hotplug support.\n"));
383 }
384
385 return rval;
386 }
387
388
389 /**
390 * megaraid_exit - driver unload entry point
391 *
392 * We simply unwrap the megaraid_init routine here
393 */
394 static void __exit
395 megaraid_exit(void)
396 {
397 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
398
399 // unregister as PCI hotplug driver
400 pci_unregister_driver(&megaraid_pci_driver_g);
401
402 return;
403 }
404
405
406 /**
407 * megaraid_probe_one - PCI hotplug entry point
408 * @param pdev : handle to this controller's PCI configuration space
409 * @param id : pci device id of the class of controllers
410 *
411 * This routine should be called whenever a new adapter is detected by the
412 * PCI hotplug susbsytem.
413 **/
414 static int __devinit
415 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
416 {
417 adapter_t *adapter;
418
419
420 // detected a new controller
421 con_log(CL_ANN, (KERN_INFO
422 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
423 pdev->vendor, pdev->device, pdev->subsystem_vendor,
424 pdev->subsystem_device));
425
426 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
427 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
428
429 if (pci_enable_device(pdev)) {
430 con_log(CL_ANN, (KERN_WARNING
431 "megaraid: pci_enable_device failed\n"));
432
433 return -ENODEV;
434 }
435
436 // Enable bus-mastering on this controller
437 pci_set_master(pdev);
438
439 // Allocate the per driver initialization structure
440 adapter = kmalloc(sizeof(adapter_t), GFP_KERNEL);
441
442 if (adapter == NULL) {
443 con_log(CL_ANN, (KERN_WARNING
444 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__));
445
446 goto out_probe_one;
447 }
448 memset(adapter, 0, sizeof(adapter_t));
449
450
451 // set up PCI related soft state and other pre-known parameters
452 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn;
453 adapter->irq = pdev->irq;
454 adapter->pdev = pdev;
455
456 atomic_set(&adapter->being_detached, 0);
457
458 // Setup the default DMA mask. This would be changed later on
459 // depending on hardware capabilities
460 if (pci_set_dma_mask(adapter->pdev, DMA_32BIT_MASK) != 0) {
461
462 con_log(CL_ANN, (KERN_WARNING
463 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
464
465 goto out_free_adapter;
466 }
467
468
469 // Initialize the synchronization lock for kernel and LLD
470 spin_lock_init(&adapter->lock);
471
472 // Initialize the command queues: the list of free SCBs and the list
473 // of pending SCBs.
474 INIT_LIST_HEAD(&adapter->kscb_pool);
475 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
476
477 INIT_LIST_HEAD(&adapter->pend_list);
478 spin_lock_init(PENDING_LIST_LOCK(adapter));
479
480 INIT_LIST_HEAD(&adapter->completed_list);
481 spin_lock_init(COMPLETED_LIST_LOCK(adapter));
482
483
484 // Start the mailbox based controller
485 if (megaraid_init_mbox(adapter) != 0) {
486 con_log(CL_ANN, (KERN_WARNING
487 "megaraid: maibox adapter did not initialize\n"));
488
489 goto out_free_adapter;
490 }
491
492 // Register with LSI Common Management Module
493 if (megaraid_cmm_register(adapter) != 0) {
494
495 con_log(CL_ANN, (KERN_WARNING
496 "megaraid: could not register with management module\n"));
497
498 goto out_fini_mbox;
499 }
500
501 // setup adapter handle in PCI soft state
502 pci_set_drvdata(pdev, adapter);
503
504 // attach with scsi mid-layer
505 if (megaraid_io_attach(adapter) != 0) {
506
507 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
508
509 goto out_cmm_unreg;
510 }
511
512 return 0;
513
514 out_cmm_unreg:
515 pci_set_drvdata(pdev, NULL);
516 megaraid_cmm_unregister(adapter);
517 out_fini_mbox:
518 megaraid_fini_mbox(adapter);
519 out_free_adapter:
520 kfree(adapter);
521 out_probe_one:
522 pci_disable_device(pdev);
523
524 return -ENODEV;
525 }
526
527
528 /**
529 * megaraid_detach_one - release the framework resources and call LLD release
530 * routine
531 * @param pdev : handle for our PCI cofiguration space
532 *
533 * This routine is called during driver unload. We free all the allocated
534 * resources and call the corresponding LLD so that it can also release all
535 * its resources.
536 *
537 * This routine is also called from the PCI hotplug system
538 **/
539 static void
540 megaraid_detach_one(struct pci_dev *pdev)
541 {
542 adapter_t *adapter;
543 struct Scsi_Host *host;
544
545
546 // Start a rollback on this adapter
547 adapter = pci_get_drvdata(pdev);
548
549 if (!adapter) {
550 con_log(CL_ANN, (KERN_CRIT
551 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
552 pdev->vendor, pdev->device, pdev->subsystem_vendor,
553 pdev->subsystem_device));
554
555 return;
556 }
557 else {
558 con_log(CL_ANN, (KERN_NOTICE
559 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
560 pdev->vendor, pdev->device, pdev->subsystem_vendor,
561 pdev->subsystem_device));
562 }
563
564
565 host = adapter->host;
566
567 // do not allow any more requests from the management module for this
568 // adapter.
569 // FIXME: How do we account for the request which might still be
570 // pending with us?
571 atomic_set(&adapter->being_detached, 1);
572
573 // detach from the IO sub-system
574 megaraid_io_detach(adapter);
575
576 // reset the device state in the PCI structure. We check this
577 // condition when we enter here. If the device state is NULL,
578 // that would mean the device has already been removed
579 pci_set_drvdata(pdev, NULL);
580
581 // Unregister from common management module
582 //
583 // FIXME: this must return success or failure for conditions if there
584 // is a command pending with LLD or not.
585 megaraid_cmm_unregister(adapter);
586
587 // finalize the mailbox based controller and release all resources
588 megaraid_fini_mbox(adapter);
589
590 kfree(adapter);
591
592 scsi_host_put(host);
593
594 pci_disable_device(pdev);
595
596 return;
597 }
598
599
600 /**
601 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
602 * @param device : generice driver model device
603 *
604 * Shutdown notification, perform flush cache
605 */
606 static void
607 megaraid_mbox_shutdown(struct pci_dev *pdev)
608 {
609 adapter_t *adapter = pci_get_drvdata(pdev);
610 static int counter;
611
612 if (!adapter) {
613 con_log(CL_ANN, (KERN_WARNING
614 "megaraid: null device in shutdown\n"));
615 return;
616 }
617
618 // flush caches now
619 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
620 counter++));
621
622 megaraid_mbox_flush_cache(adapter);
623
624 con_log(CL_ANN, ("done\n"));
625 }
626
627
628 /**
629 * megaraid_io_attach - attach a device with the IO subsystem
630 * @param adapter : controller's soft state
631 *
632 * Attach this device with the IO subsystem
633 **/
634 static int
635 megaraid_io_attach(adapter_t *adapter)
636 {
637 struct Scsi_Host *host;
638
639 // Initialize SCSI Host structure
640 host = scsi_host_alloc(&megaraid_template_g, 8);
641 if (!host) {
642 con_log(CL_ANN, (KERN_WARNING
643 "megaraid mbox: scsi_register failed\n"));
644
645 return -1;
646 }
647
648 SCSIHOST2ADAP(host) = (caddr_t)adapter;
649 adapter->host = host;
650
651 host->irq = adapter->irq;
652 host->unique_id = adapter->unique_id;
653 host->can_queue = adapter->max_cmds;
654 host->this_id = adapter->init_id;
655 host->sg_tablesize = adapter->sglen;
656 host->max_sectors = adapter->max_sectors;
657 host->cmd_per_lun = adapter->cmd_per_lun;
658 host->max_channel = adapter->max_channel;
659 host->max_id = adapter->max_target;
660 host->max_lun = adapter->max_lun;
661
662
663 // notify mid-layer about the new controller
664 if (scsi_add_host(host, &adapter->pdev->dev)) {
665
666 con_log(CL_ANN, (KERN_WARNING
667 "megaraid mbox: scsi_add_host failed\n"));
668
669 scsi_host_put(host);
670
671 return -1;
672 }
673
674 scsi_scan_host(host);
675
676 return 0;
677 }
678
679
680 /**
681 * megaraid_io_detach - detach a device from the IO subsystem
682 * @param adapter : controller's soft state
683 *
684 * Detach this device from the IO subsystem
685 **/
686 static void
687 megaraid_io_detach(adapter_t *adapter)
688 {
689 struct Scsi_Host *host;
690
691 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
692
693 host = adapter->host;
694
695 scsi_remove_host(host);
696
697 return;
698 }
699
700
701 /*
702 * START: Mailbox Low Level Driver
703 *
704 * This is section specific to the single mailbox based controllers
705 */
706
707 /**
708 * megaraid_init_mbox - initialize controller
709 * @param adapter - our soft state
710 *
711 * . Allocate 16-byte aligned mailbox memory for firmware handshake
712 * . Allocate controller's memory resources
713 * . Find out all initialization data
714 * . Allocate memory required for all the commands
715 * . Use internal library of FW routines, build up complete soft state
716 */
717 static int __init
718 megaraid_init_mbox(adapter_t *adapter)
719 {
720 struct pci_dev *pdev;
721 mraid_device_t *raid_dev;
722 int i;
723
724
725 adapter->ito = MBOX_TIMEOUT;
726 pdev = adapter->pdev;
727
728 /*
729 * Allocate and initialize the init data structure for mailbox
730 * controllers
731 */
732 raid_dev = kmalloc(sizeof(mraid_device_t), GFP_KERNEL);
733 if (raid_dev == NULL) return -1;
734
735 memset(raid_dev, 0, sizeof(mraid_device_t));
736
737 /*
738 * Attach the adapter soft state to raid device soft state
739 */
740 adapter->raid_device = (caddr_t)raid_dev;
741 raid_dev->fast_load = megaraid_fast_load;
742
743
744 // our baseport
745 raid_dev->baseport = pci_resource_start(pdev, 0);
746
747 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
748
749 con_log(CL_ANN, (KERN_WARNING
750 "megaraid: mem region busy\n"));
751
752 goto out_free_raid_dev;
753 }
754
755 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
756
757 if (!raid_dev->baseaddr) {
758
759 con_log(CL_ANN, (KERN_WARNING
760 "megaraid: could not map hba memory\n") );
761
762 goto out_release_regions;
763 }
764
765 //
766 // Setup the rest of the soft state using the library of FW routines
767 //
768
769 // request IRQ and register the interrupt service routine
770 if (request_irq(adapter->irq, megaraid_isr, SA_SHIRQ, "megaraid",
771 adapter)) {
772
773 con_log(CL_ANN, (KERN_WARNING
774 "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
775
776 goto out_iounmap;
777 }
778
779
780 // initialize the mutual exclusion lock for the mailbox
781 spin_lock_init(&raid_dev->mailbox_lock);
782
783 // allocate memory required for commands
784 if (megaraid_alloc_cmd_packets(adapter) != 0) {
785 goto out_free_irq;
786 }
787
788 // Product info
789 if (megaraid_mbox_product_info(adapter) != 0) {
790 goto out_alloc_cmds;
791 }
792
793 // Do we support extended CDBs
794 adapter->max_cdb_sz = 10;
795 if (megaraid_mbox_extended_cdb(adapter) == 0) {
796 adapter->max_cdb_sz = 16;
797 }
798
799 /*
800 * Do we support cluster environment, if we do, what is the initiator
801 * id.
802 * NOTE: In a non-cluster aware firmware environment, the LLD should
803 * return 7 as initiator id.
804 */
805 adapter->ha = 0;
806 adapter->init_id = -1;
807 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
808 adapter->ha = 1;
809 }
810
811 /*
812 * Prepare the device ids array to have the mapping between the kernel
813 * device address and megaraid device address.
814 * We export the physical devices on their actual addresses. The
815 * logical drives are exported on a virtual SCSI channel
816 */
817 megaraid_mbox_setup_device_map(adapter);
818
819 // If the firmware supports random deletion, update the device id map
820 if (megaraid_mbox_support_random_del(adapter)) {
821
822 // Change the logical drives numbers in device_ids array one
823 // slot in device_ids is reserved for target id, that's why
824 // "<=" below
825 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
826 adapter->device_ids[adapter->max_channel][i] += 0x80;
827 }
828 adapter->device_ids[adapter->max_channel][adapter->init_id] =
829 0xFF;
830
831 raid_dev->random_del_supported = 1;
832 }
833
834 /*
835 * find out the maximum number of scatter-gather elements supported by
836 * this firmware
837 */
838 adapter->sglen = megaraid_mbox_get_max_sg(adapter);
839
840 // enumerate RAID and SCSI channels so that all devices on SCSI
841 // channels can later be exported, including disk devices
842 megaraid_mbox_enum_raid_scsi(adapter);
843
844 /*
845 * Other parameters required by upper layer
846 *
847 * maximum number of sectors per IO command
848 */
849 adapter->max_sectors = megaraid_max_sectors;
850
851 /*
852 * number of queued commands per LUN.
853 */
854 adapter->cmd_per_lun = megaraid_cmd_per_lun;
855
856 /*
857 * Allocate resources required to issue FW calls, when sysfs is
858 * accessed
859 */
860 if (megaraid_sysfs_alloc_resources(adapter) != 0) {
861 goto out_alloc_cmds;
862 }
863
864 // Set the DMA mask to 64-bit. All supported controllers as capable of
865 // DMA in this range
866 if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK) != 0) {
867
868 con_log(CL_ANN, (KERN_WARNING
869 "megaraid: could not set DMA mask for 64-bit.\n"));
870
871 goto out_free_sysfs_res;
872 }
873
874 // setup tasklet for DPC
875 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
876 (unsigned long)adapter);
877
878 con_log(CL_DLEVEL1, (KERN_INFO
879 "megaraid mbox hba successfully initialized\n"));
880
881 return 0;
882
883 out_free_sysfs_res:
884 megaraid_sysfs_free_resources(adapter);
885 out_alloc_cmds:
886 megaraid_free_cmd_packets(adapter);
887 out_free_irq:
888 free_irq(adapter->irq, adapter);
889 out_iounmap:
890 iounmap(raid_dev->baseaddr);
891 out_release_regions:
892 pci_release_regions(pdev);
893 out_free_raid_dev:
894 kfree(raid_dev);
895
896 return -1;
897 }
898
899
900 /**
901 * megaraid_fini_mbox - undo controller initialization
902 * @param adapter : our soft state
903 */
904 static void
905 megaraid_fini_mbox(adapter_t *adapter)
906 {
907 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
908
909 // flush all caches
910 megaraid_mbox_flush_cache(adapter);
911
912 tasklet_kill(&adapter->dpc_h);
913
914 megaraid_sysfs_free_resources(adapter);
915
916 megaraid_free_cmd_packets(adapter);
917
918 free_irq(adapter->irq, adapter);
919
920 iounmap(raid_dev->baseaddr);
921
922 pci_release_regions(adapter->pdev);
923
924 kfree(raid_dev);
925
926 return;
927 }
928
929
930 /**
931 * megaraid_alloc_cmd_packets - allocate shared mailbox
932 * @param adapter : soft state of the raid controller
933 *
934 * Allocate and align the shared mailbox. This maibox is used to issue
935 * all the commands. For IO based controllers, the mailbox is also regsitered
936 * with the FW. Allocate memory for all commands as well.
937 * This is our big allocator
938 */
939 static int
940 megaraid_alloc_cmd_packets(adapter_t *adapter)
941 {
942 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
943 struct pci_dev *pdev;
944 unsigned long align;
945 scb_t *scb;
946 mbox_ccb_t *ccb;
947 struct mraid_pci_blk *epthru_pci_blk;
948 struct mraid_pci_blk *sg_pci_blk;
949 struct mraid_pci_blk *mbox_pci_blk;
950 int i;
951
952 pdev = adapter->pdev;
953
954 /*
955 * Setup the mailbox
956 * Allocate the common 16-byte aligned memory for the handshake
957 * mailbox.
958 */
959 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
960 sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
961
962 if (!raid_dev->una_mbox64) {
963 con_log(CL_ANN, (KERN_WARNING
964 "megaraid: out of memory, %s %d\n", __FUNCTION__,
965 __LINE__));
966 return -1;
967 }
968 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
969
970 /*
971 * Align the mailbox at 16-byte boundary
972 */
973 raid_dev->mbox = &raid_dev->una_mbox64->mbox32;
974
975 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
976 (~0UL ^ 0xFUL));
977
978 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
979
980 align = ((void *)raid_dev->mbox -
981 ((void *)&raid_dev->una_mbox64->mbox32));
982
983 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
984 align;
985
986 // Allocate memory for commands issued internally
987 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
988 &adapter->ibuf_dma_h);
989 if (!adapter->ibuf) {
990
991 con_log(CL_ANN, (KERN_WARNING
992 "megaraid: out of memory, %s %d\n", __FUNCTION__,
993 __LINE__));
994
995 goto out_free_common_mbox;
996 }
997 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
998
999 // Allocate memory for our SCSI Command Blocks and their associated
1000 // memory
1001
1002 /*
1003 * Allocate memory for the base list of scb. Later allocate memory for
1004 * CCBs and embedded components of each CCB and point the pointers in
1005 * scb to the allocated components
1006 * NOTE: The code to allocate SCB will be duplicated in all the LLD
1007 * since the calling routine does not yet know the number of available
1008 * commands.
1009 */
1010 adapter->kscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_SCSI_CMDS,
1011 GFP_KERNEL);
1012
1013 if (adapter->kscb_list == NULL) {
1014 con_log(CL_ANN, (KERN_WARNING
1015 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1016 __LINE__));
1017 goto out_free_ibuf;
1018 }
1019 memset(adapter->kscb_list, 0, sizeof(scb_t) * MBOX_MAX_SCSI_CMDS);
1020
1021 // memory allocation for our command packets
1022 if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1023 con_log(CL_ANN, (KERN_WARNING
1024 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1025 __LINE__));
1026 goto out_free_scb_list;
1027 }
1028
1029 // Adjust the scb pointers and link in the free pool
1030 epthru_pci_blk = raid_dev->epthru_pool;
1031 sg_pci_blk = raid_dev->sg_pool;
1032 mbox_pci_blk = raid_dev->mbox_pool;
1033
1034 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1035 scb = adapter->kscb_list + i;
1036 ccb = raid_dev->ccb_list + i;
1037
1038 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1039 ccb->raw_mbox = (uint8_t *)ccb->mbox;
1040 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1041 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1042
1043 // make sure the mailbox is aligned properly
1044 if (ccb->mbox_dma_h & 0x0F) {
1045 con_log(CL_ANN, (KERN_CRIT
1046 "megaraid mbox: not aligned on 16-bytes\n"));
1047
1048 goto out_teardown_dma_pools;
1049 }
1050
1051 ccb->epthru = (mraid_epassthru_t *)
1052 epthru_pci_blk[i].vaddr;
1053 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr;
1054 ccb->pthru = (mraid_passthru_t *)ccb->epthru;
1055 ccb->pthru_dma_h = ccb->epthru_dma_h;
1056
1057
1058 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1059 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr;
1060 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64;
1061
1062 scb->ccb = (caddr_t)ccb;
1063 scb->gp = 0;
1064
1065 scb->sno = i; // command index
1066
1067 scb->scp = NULL;
1068 scb->state = SCB_FREE;
1069 scb->dma_direction = PCI_DMA_NONE;
1070 scb->dma_type = MRAID_DMA_NONE;
1071 scb->dev_channel = -1;
1072 scb->dev_target = -1;
1073
1074 // put scb in the free pool
1075 list_add_tail(&scb->list, &adapter->kscb_pool);
1076 }
1077
1078 return 0;
1079
1080 out_teardown_dma_pools:
1081 megaraid_mbox_teardown_dma_pools(adapter);
1082 out_free_scb_list:
1083 kfree(adapter->kscb_list);
1084 out_free_ibuf:
1085 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1086 adapter->ibuf_dma_h);
1087 out_free_common_mbox:
1088 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1089 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1090
1091 return -1;
1092 }
1093
1094
1095 /**
1096 * megaraid_free_cmd_packets - free memory
1097 * @param adapter : soft state of the raid controller
1098 *
1099 * Release memory resources allocated for commands
1100 */
1101 static void
1102 megaraid_free_cmd_packets(adapter_t *adapter)
1103 {
1104 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1105
1106 megaraid_mbox_teardown_dma_pools(adapter);
1107
1108 kfree(adapter->kscb_list);
1109
1110 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1111 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1112
1113 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1114 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1115 return;
1116 }
1117
1118
1119 /**
1120 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1121 * @param adapter : HBA soft state
1122 *
1123 * setup the dma pools for mailbox, passthru and extended passthru structures,
1124 * and scatter-gather lists
1125 */
1126 static int
1127 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1128 {
1129 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1130 struct mraid_pci_blk *epthru_pci_blk;
1131 struct mraid_pci_blk *sg_pci_blk;
1132 struct mraid_pci_blk *mbox_pci_blk;
1133 int i;
1134
1135
1136
1137 // Allocate memory for 16-bytes aligned mailboxes
1138 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1139 adapter->pdev,
1140 sizeof(mbox64_t) + 16,
1141 16, 0);
1142
1143 if (raid_dev->mbox_pool_handle == NULL) {
1144 goto fail_setup_dma_pool;
1145 }
1146
1147 mbox_pci_blk = raid_dev->mbox_pool;
1148 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1149 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1150 raid_dev->mbox_pool_handle,
1151 GFP_KERNEL,
1152 &mbox_pci_blk[i].dma_addr);
1153 if (!mbox_pci_blk[i].vaddr) {
1154 goto fail_setup_dma_pool;
1155 }
1156 }
1157
1158 /*
1159 * Allocate memory for each embedded passthru strucuture pointer
1160 * Request for a 128 bytes aligned structure for each passthru command
1161 * structure
1162 * Since passthru and extended passthru commands are exclusive, they
1163 * share common memory pool. Passthru structures piggyback on memory
1164 * allocted to extended passthru since passthru is smaller of the two
1165 */
1166 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1167 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1168
1169 if (raid_dev->epthru_pool_handle == NULL) {
1170 goto fail_setup_dma_pool;
1171 }
1172
1173 epthru_pci_blk = raid_dev->epthru_pool;
1174 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1175 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1176 raid_dev->epthru_pool_handle,
1177 GFP_KERNEL,
1178 &epthru_pci_blk[i].dma_addr);
1179 if (!epthru_pci_blk[i].vaddr) {
1180 goto fail_setup_dma_pool;
1181 }
1182 }
1183
1184
1185 // Allocate memory for each scatter-gather list. Request for 512 bytes
1186 // alignment for each sg list
1187 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1188 adapter->pdev,
1189 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1190 512, 0);
1191
1192 if (raid_dev->sg_pool_handle == NULL) {
1193 goto fail_setup_dma_pool;
1194 }
1195
1196 sg_pci_blk = raid_dev->sg_pool;
1197 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1198 sg_pci_blk[i].vaddr = pci_pool_alloc(
1199 raid_dev->sg_pool_handle,
1200 GFP_KERNEL,
1201 &sg_pci_blk[i].dma_addr);
1202 if (!sg_pci_blk[i].vaddr) {
1203 goto fail_setup_dma_pool;
1204 }
1205 }
1206
1207 return 0;
1208
1209 fail_setup_dma_pool:
1210 megaraid_mbox_teardown_dma_pools(adapter);
1211 return -1;
1212 }
1213
1214
1215 /**
1216 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1217 * @param adapter : HBA soft state
1218 *
1219 * teardown the dma pool for mailbox, passthru and extended passthru
1220 * structures, and scatter-gather lists
1221 */
1222 static void
1223 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1224 {
1225 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1226 struct mraid_pci_blk *epthru_pci_blk;
1227 struct mraid_pci_blk *sg_pci_blk;
1228 struct mraid_pci_blk *mbox_pci_blk;
1229 int i;
1230
1231
1232 sg_pci_blk = raid_dev->sg_pool;
1233 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1234 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1235 sg_pci_blk[i].dma_addr);
1236 }
1237 if (raid_dev->sg_pool_handle)
1238 pci_pool_destroy(raid_dev->sg_pool_handle);
1239
1240
1241 epthru_pci_blk = raid_dev->epthru_pool;
1242 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1243 pci_pool_free(raid_dev->epthru_pool_handle,
1244 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1245 }
1246 if (raid_dev->epthru_pool_handle)
1247 pci_pool_destroy(raid_dev->epthru_pool_handle);
1248
1249
1250 mbox_pci_blk = raid_dev->mbox_pool;
1251 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1252 pci_pool_free(raid_dev->mbox_pool_handle,
1253 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1254 }
1255 if (raid_dev->mbox_pool_handle)
1256 pci_pool_destroy(raid_dev->mbox_pool_handle);
1257
1258 return;
1259 }
1260
1261
1262 /**
1263 * megaraid_alloc_scb - detach and return a scb from the free list
1264 * @adapter : controller's soft state
1265 *
1266 * return the scb from the head of the free list. NULL if there are none
1267 * available
1268 **/
1269 static scb_t *
1270 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1271 {
1272 struct list_head *head = &adapter->kscb_pool;
1273 scb_t *scb = NULL;
1274 unsigned long flags;
1275
1276 // detach scb from free pool
1277 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1278
1279 if (list_empty(head)) {
1280 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1281 return NULL;
1282 }
1283
1284 scb = list_entry(head->next, scb_t, list);
1285 list_del_init(&scb->list);
1286
1287 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1288
1289 scb->state = SCB_ACTIVE;
1290 scb->scp = scp;
1291 scb->dma_type = MRAID_DMA_NONE;
1292
1293 return scb;
1294 }
1295
1296
1297 /**
1298 * megaraid_dealloc_scb - return the scb to the free pool
1299 * @adapter : controller's soft state
1300 * @scb : scb to be freed
1301 *
1302 * return the scb back to the free list of scbs. The caller must 'flush' the
1303 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1304 * NOTE NOTE: Make sure the scb is not on any list before calling this
1305 * routine.
1306 **/
1307 static inline void
1308 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1309 {
1310 unsigned long flags;
1311
1312 // put scb in the free pool
1313 scb->state = SCB_FREE;
1314 scb->scp = NULL;
1315 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1316
1317 list_add(&scb->list, &adapter->kscb_pool);
1318
1319 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1320
1321 return;
1322 }
1323
1324
1325 /**
1326 * megaraid_mbox_mksgl - make the scatter-gather list
1327 * @adapter - controller's soft state
1328 * @scb - scsi control block
1329 *
1330 * prepare the scatter-gather list
1331 */
1332 static int
1333 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1334 {
1335 struct scatterlist *sgl;
1336 mbox_ccb_t *ccb;
1337 struct page *page;
1338 unsigned long offset;
1339 struct scsi_cmnd *scp;
1340 int sgcnt;
1341 int i;
1342
1343
1344 scp = scb->scp;
1345 ccb = (mbox_ccb_t *)scb->ccb;
1346
1347 // no mapping required if no data to be transferred
1348 if (!scp->request_buffer || !scp->request_bufflen)
1349 return 0;
1350
1351 if (!scp->use_sg) { /* scatter-gather list not used */
1352
1353 page = virt_to_page(scp->request_buffer);
1354
1355 offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK);
1356
1357 ccb->buf_dma_h = pci_map_page(adapter->pdev, page, offset,
1358 scp->request_bufflen,
1359 scb->dma_direction);
1360 scb->dma_type = MRAID_DMA_WBUF;
1361
1362 /*
1363 * We need to handle special 64-bit commands that need a
1364 * minimum of 1 SG
1365 */
1366 sgcnt = 1;
1367 ccb->sgl64[0].address = ccb->buf_dma_h;
1368 ccb->sgl64[0].length = scp->request_bufflen;
1369
1370 return sgcnt;
1371 }
1372
1373 sgl = (struct scatterlist *)scp->request_buffer;
1374
1375 // The number of sg elements returned must not exceed our limit
1376 sgcnt = pci_map_sg(adapter->pdev, sgl, scp->use_sg,
1377 scb->dma_direction);
1378
1379 if (sgcnt > adapter->sglen) {
1380 con_log(CL_ANN, (KERN_CRIT
1381 "megaraid critical: too many sg elements:%d\n",
1382 sgcnt));
1383 BUG();
1384 }
1385
1386 scb->dma_type = MRAID_DMA_WSG;
1387
1388 for (i = 0; i < sgcnt; i++, sgl++) {
1389 ccb->sgl64[i].address = sg_dma_address(sgl);
1390 ccb->sgl64[i].length = sg_dma_len(sgl);
1391 }
1392
1393 // Return count of SG nodes
1394 return sgcnt;
1395 }
1396
1397
1398 /**
1399 * mbox_post_cmd - issue a mailbox command
1400 * @adapter - controller's soft state
1401 * @scb - command to be issued
1402 *
1403 * post the command to the controller if mailbox is availble.
1404 */
1405 static int
1406 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1407 {
1408 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1409 mbox64_t *mbox64;
1410 mbox_t *mbox;
1411 mbox_ccb_t *ccb;
1412 unsigned long flags;
1413 unsigned int i = 0;
1414
1415
1416 ccb = (mbox_ccb_t *)scb->ccb;
1417 mbox = raid_dev->mbox;
1418 mbox64 = raid_dev->mbox64;
1419
1420 /*
1421 * Check for busy mailbox. If it is, return failure - the caller
1422 * should retry later.
1423 */
1424 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1425
1426 if (unlikely(mbox->busy)) {
1427 do {
1428 udelay(1);
1429 i++;
1430 rmb();
1431 } while(mbox->busy && (i < max_mbox_busy_wait));
1432
1433 if (mbox->busy) {
1434
1435 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1436
1437 return -1;
1438 }
1439 }
1440
1441
1442 // Copy this command's mailbox data into "adapter's" mailbox
1443 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1444 mbox->cmdid = scb->sno;
1445
1446 adapter->outstanding_cmds++;
1447
1448 if (scb->dma_direction == PCI_DMA_TODEVICE) {
1449 if (!scb->scp->use_sg) { // sg list not used
1450 pci_dma_sync_single_for_device(adapter->pdev,
1451 ccb->buf_dma_h,
1452 scb->scp->request_bufflen,
1453 PCI_DMA_TODEVICE);
1454 }
1455 else {
1456 pci_dma_sync_sg_for_device(adapter->pdev,
1457 scb->scp->request_buffer,
1458 scb->scp->use_sg, PCI_DMA_TODEVICE);
1459 }
1460 }
1461
1462 mbox->busy = 1; // Set busy
1463 mbox->poll = 0;
1464 mbox->ack = 0;
1465 wmb();
1466
1467 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1468
1469 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1470
1471 return 0;
1472 }
1473
1474
1475 /**
1476 * megaraid_queue_command - generic queue entry point for all LLDs
1477 * @scp : pointer to the scsi command to be executed
1478 * @done : callback routine to be called after the cmd has be completed
1479 *
1480 * Queue entry point for mailbox based controllers.
1481 */
1482 static int
1483 megaraid_queue_command(struct scsi_cmnd *scp, void (* done)(struct scsi_cmnd *))
1484 {
1485 adapter_t *adapter;
1486 scb_t *scb;
1487 int if_busy;
1488
1489 adapter = SCP2ADAPTER(scp);
1490 scp->scsi_done = done;
1491 scp->result = 0;
1492
1493 /*
1494 * Allocate and build a SCB request
1495 * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1496 * not allocate scb. We will return non-zero status in that case.
1497 * NOTE: scb can be null even though certain commands completed
1498 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1499 * return 0 in that case, and we would do the callback right away.
1500 */
1501 if_busy = 0;
1502 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1503 if (!scb) { // command already completed
1504 done(scp);
1505 return 0;
1506 }
1507
1508 megaraid_mbox_runpendq(adapter, scb);
1509 return if_busy;
1510 }
1511
1512 /**
1513 * megaraid_mbox_build_cmd - transform the mid-layer scsi command to megaraid
1514 * firmware lingua
1515 * @adapter - controller's soft state
1516 * @scp - mid-layer scsi command pointer
1517 * @busy - set if request could not be completed because of lack of
1518 * resources
1519 *
1520 * convert the command issued by mid-layer to format understood by megaraid
1521 * firmware. We also complete certain command without sending them to firmware
1522 */
1523 static scb_t *
1524 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1525 {
1526 mraid_device_t *rdev = ADAP2RAIDDEV(adapter);
1527 int channel;
1528 int target;
1529 int islogical;
1530 mbox_ccb_t *ccb;
1531 mraid_passthru_t *pthru;
1532 mbox64_t *mbox64;
1533 mbox_t *mbox;
1534 scb_t *scb;
1535 char skip[] = "skipping";
1536 char scan[] = "scanning";
1537 char *ss;
1538
1539
1540 /*
1541 * Get the appropriate device map for the device this command is
1542 * intended for
1543 */
1544 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1545
1546 /*
1547 * Logical drive commands
1548 */
1549 if (islogical) {
1550 switch (scp->cmnd[0]) {
1551 case TEST_UNIT_READY:
1552 /*
1553 * Do we support clustering and is the support enabled
1554 * If no, return success always
1555 */
1556 if (!adapter->ha) {
1557 scp->result = (DID_OK << 16);
1558 return NULL;
1559 }
1560
1561 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1562 scp->result = (DID_ERROR << 16);
1563 *busy = 1;
1564 return NULL;
1565 }
1566
1567 scb->dma_direction = scp->sc_data_direction;
1568 scb->dev_channel = 0xFF;
1569 scb->dev_target = target;
1570 ccb = (mbox_ccb_t *)scb->ccb;
1571
1572 /*
1573 * The command id will be provided by the command
1574 * issuance routine
1575 */
1576 ccb->raw_mbox[0] = CLUSTER_CMD;
1577 ccb->raw_mbox[2] = RESERVATION_STATUS;
1578 ccb->raw_mbox[3] = target;
1579
1580 return scb;
1581
1582 case MODE_SENSE:
1583 if (scp->use_sg) {
1584 struct scatterlist *sgl;
1585 caddr_t vaddr;
1586
1587 sgl = (struct scatterlist *)scp->request_buffer;
1588 if (sgl->page) {
1589 vaddr = (caddr_t)
1590 (page_address((&sgl[0])->page)
1591 + (&sgl[0])->offset);
1592
1593 memset(vaddr, 0, scp->cmnd[4]);
1594 }
1595 else {
1596 con_log(CL_ANN, (KERN_WARNING
1597 "megaraid mailbox: invalid sg:%d\n",
1598 __LINE__));
1599 }
1600 }
1601 else {
1602 memset(scp->request_buffer, 0, scp->cmnd[4]);
1603 }
1604 scp->result = (DID_OK << 16);
1605 return NULL;
1606
1607 case INQUIRY:
1608 /*
1609 * Display the channel scan for logical drives
1610 * Do not display scan for a channel if already done.
1611 */
1612 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1613
1614 con_log(CL_ANN, (KERN_INFO
1615 "scsi[%d]: scanning scsi channel %d",
1616 adapter->host->host_no,
1617 SCP2CHANNEL(scp)));
1618
1619 con_log(CL_ANN, (
1620 " [virtual] for logical drives\n"));
1621
1622 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1623 }
1624
1625 /* Fall through */
1626
1627 case READ_CAPACITY:
1628 /*
1629 * Do not allow LUN > 0 for logical drives and
1630 * requests for more than 40 logical drives
1631 */
1632 if (SCP2LUN(scp)) {
1633 scp->result = (DID_BAD_TARGET << 16);
1634 return NULL;
1635 }
1636 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1637 scp->result = (DID_BAD_TARGET << 16);
1638 return NULL;
1639 }
1640
1641
1642 /* Allocate a SCB and initialize passthru */
1643 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1644 scp->result = (DID_ERROR << 16);
1645 *busy = 1;
1646 return NULL;
1647 }
1648
1649 ccb = (mbox_ccb_t *)scb->ccb;
1650 scb->dev_channel = 0xFF;
1651 scb->dev_target = target;
1652 pthru = ccb->pthru;
1653 mbox = ccb->mbox;
1654 mbox64 = ccb->mbox64;
1655
1656 pthru->timeout = 0;
1657 pthru->ars = 1;
1658 pthru->reqsenselen = 14;
1659 pthru->islogical = 1;
1660 pthru->logdrv = target;
1661 pthru->cdblen = scp->cmd_len;
1662 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1663
1664 mbox->cmd = MBOXCMD_PASSTHRU64;
1665 scb->dma_direction = scp->sc_data_direction;
1666
1667 pthru->dataxferlen = scp->request_bufflen;
1668 pthru->dataxferaddr = ccb->sgl_dma_h;
1669 pthru->numsge = megaraid_mbox_mksgl(adapter,
1670 scb);
1671
1672 mbox->xferaddr = 0xFFFFFFFF;
1673 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h;
1674 mbox64->xferaddr_hi = 0;
1675
1676 return scb;
1677
1678 case READ_6:
1679 case WRITE_6:
1680 case READ_10:
1681 case WRITE_10:
1682 case READ_12:
1683 case WRITE_12:
1684
1685 /*
1686 * Allocate a SCB and initialize mailbox
1687 */
1688 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1689 scp->result = (DID_ERROR << 16);
1690 *busy = 1;
1691 return NULL;
1692 }
1693 ccb = (mbox_ccb_t *)scb->ccb;
1694 scb->dev_channel = 0xFF;
1695 scb->dev_target = target;
1696 mbox = ccb->mbox;
1697 mbox64 = ccb->mbox64;
1698 mbox->logdrv = target;
1699
1700 /*
1701 * A little HACK: 2nd bit is zero for all scsi read
1702 * commands and is set for all scsi write commands
1703 */
1704 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64:
1705 MBOXCMD_LREAD64 ;
1706
1707 /*
1708 * 6-byte READ(0x08) or WRITE(0x0A) cdb
1709 */
1710 if (scp->cmd_len == 6) {
1711 mbox->numsectors = (uint32_t)scp->cmnd[4];
1712 mbox->lba =
1713 ((uint32_t)scp->cmnd[1] << 16) |
1714 ((uint32_t)scp->cmnd[2] << 8) |
1715 (uint32_t)scp->cmnd[3];
1716
1717 mbox->lba &= 0x1FFFFF;
1718 }
1719
1720 /*
1721 * 10-byte READ(0x28) or WRITE(0x2A) cdb
1722 */
1723 else if (scp->cmd_len == 10) {
1724 mbox->numsectors =
1725 (uint32_t)scp->cmnd[8] |
1726 ((uint32_t)scp->cmnd[7] << 8);
1727 mbox->lba =
1728 ((uint32_t)scp->cmnd[2] << 24) |
1729 ((uint32_t)scp->cmnd[3] << 16) |
1730 ((uint32_t)scp->cmnd[4] << 8) |
1731 (uint32_t)scp->cmnd[5];
1732 }
1733
1734 /*
1735 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1736 */
1737 else if (scp->cmd_len == 12) {
1738 mbox->lba =
1739 ((uint32_t)scp->cmnd[2] << 24) |
1740 ((uint32_t)scp->cmnd[3] << 16) |
1741 ((uint32_t)scp->cmnd[4] << 8) |
1742 (uint32_t)scp->cmnd[5];
1743
1744 mbox->numsectors =
1745 ((uint32_t)scp->cmnd[6] << 24) |
1746 ((uint32_t)scp->cmnd[7] << 16) |
1747 ((uint32_t)scp->cmnd[8] << 8) |
1748 (uint32_t)scp->cmnd[9];
1749 }
1750 else {
1751 con_log(CL_ANN, (KERN_WARNING
1752 "megaraid: unsupported CDB length\n"));
1753
1754 megaraid_dealloc_scb(adapter, scb);
1755
1756 scp->result = (DID_ERROR << 16);
1757 return NULL;
1758 }
1759
1760 scb->dma_direction = scp->sc_data_direction;
1761
1762 // Calculate Scatter-Gather info
1763 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h;
1764 mbox->numsge = megaraid_mbox_mksgl(adapter,
1765 scb);
1766 mbox->xferaddr = 0xFFFFFFFF;
1767 mbox64->xferaddr_hi = 0;
1768
1769 return scb;
1770
1771 case RESERVE:
1772 case RELEASE:
1773 /*
1774 * Do we support clustering and is the support enabled
1775 */
1776 if (!adapter->ha) {
1777 scp->result = (DID_BAD_TARGET << 16);
1778 return NULL;
1779 }
1780
1781 /*
1782 * Allocate a SCB and initialize mailbox
1783 */
1784 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1785 scp->result = (DID_ERROR << 16);
1786 *busy = 1;
1787 return NULL;
1788 }
1789
1790 ccb = (mbox_ccb_t *)scb->ccb;
1791 scb->dev_channel = 0xFF;
1792 scb->dev_target = target;
1793 ccb->raw_mbox[0] = CLUSTER_CMD;
1794 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ?
1795 RESERVE_LD : RELEASE_LD;
1796
1797 ccb->raw_mbox[3] = target;
1798 scb->dma_direction = scp->sc_data_direction;
1799
1800 return scb;
1801
1802 default:
1803 scp->result = (DID_BAD_TARGET << 16);
1804 return NULL;
1805 }
1806 }
1807 else { // Passthru device commands
1808
1809 // Do not allow access to target id > 15 or LUN > 7
1810 if (target > 15 || SCP2LUN(scp) > 7) {
1811 scp->result = (DID_BAD_TARGET << 16);
1812 return NULL;
1813 }
1814
1815 // if fast load option was set and scan for last device is
1816 // over, reset the fast_load flag so that during a possible
1817 // next scan, devices can be made available
1818 if (rdev->fast_load && (target == 15) &&
1819 (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1820
1821 con_log(CL_ANN, (KERN_INFO
1822 "megaraid[%d]: physical device scan re-enabled\n",
1823 adapter->host->host_no));
1824 rdev->fast_load = 0;
1825 }
1826
1827 /*
1828 * Display the channel scan for physical devices
1829 */
1830 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1831
1832 ss = rdev->fast_load ? skip : scan;
1833
1834 con_log(CL_ANN, (KERN_INFO
1835 "scsi[%d]: %s scsi channel %d [Phy %d]",
1836 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1837 channel));
1838
1839 con_log(CL_ANN, (
1840 " for non-raid devices\n"));
1841
1842 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1843 }
1844
1845 // disable channel sweep if fast load option given
1846 if (rdev->fast_load) {
1847 scp->result = (DID_BAD_TARGET << 16);
1848 return NULL;
1849 }
1850
1851 // Allocate a SCB and initialize passthru
1852 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1853 scp->result = (DID_ERROR << 16);
1854 *busy = 1;
1855 return NULL;
1856 }
1857
1858 ccb = (mbox_ccb_t *)scb->ccb;
1859 scb->dev_channel = channel;
1860 scb->dev_target = target;
1861 scb->dma_direction = scp->sc_data_direction;
1862 mbox = ccb->mbox;
1863 mbox64 = ccb->mbox64;
1864
1865 // Does this firmware support extended CDBs
1866 if (adapter->max_cdb_sz == 16) {
1867 mbox->cmd = MBOXCMD_EXTPTHRU;
1868
1869 megaraid_mbox_prepare_epthru(adapter, scb, scp);
1870
1871 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h;
1872 mbox64->xferaddr_hi = 0;
1873 mbox->xferaddr = 0xFFFFFFFF;
1874 }
1875 else {
1876 mbox->cmd = MBOXCMD_PASSTHRU64;
1877
1878 megaraid_mbox_prepare_pthru(adapter, scb, scp);
1879
1880 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h;
1881 mbox64->xferaddr_hi = 0;
1882 mbox->xferaddr = 0xFFFFFFFF;
1883 }
1884 return scb;
1885 }
1886
1887 // NOT REACHED
1888 }
1889
1890
1891 /**
1892 * megaraid_mbox_runpendq - execute commands queued in the pending queue
1893 * @adapter : controller's soft state
1894 * @scb : SCB to be queued in the pending list
1895 *
1896 * scan the pending list for commands which are not yet issued and try to
1897 * post to the controller. The SCB can be a null pointer, which would indicate
1898 * no SCB to be queue, just try to execute the ones in the pending list.
1899 *
1900 * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1901 * out from the head of the pending list. If it is successfully issued, the
1902 * next SCB is at the head now.
1903 */
1904 static void
1905 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1906 {
1907 scb_t *scb;
1908 unsigned long flags;
1909
1910 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1911
1912 if (scb_q) {
1913 scb_q->state = SCB_PENDQ;
1914 list_add_tail(&scb_q->list, &adapter->pend_list);
1915 }
1916
1917 // if the adapter in not in quiescent mode, post the commands to FW
1918 if (adapter->quiescent) {
1919 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1920 return;
1921 }
1922
1923 while (!list_empty(&adapter->pend_list)) {
1924
1925 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1926
1927 scb = list_entry(adapter->pend_list.next, scb_t, list);
1928
1929 // remove the scb from the pending list and try to
1930 // issue. If we are unable to issue it, put back in
1931 // the pending list and return
1932
1933 list_del_init(&scb->list);
1934
1935 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1936
1937 // if mailbox was busy, return SCB back to pending
1938 // list. Make sure to add at the head, since that's
1939 // where it would have been removed from
1940
1941 scb->state = SCB_ISSUED;
1942
1943 if (mbox_post_cmd(adapter, scb) != 0) {
1944
1945 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1946
1947 scb->state = SCB_PENDQ;
1948
1949 list_add(&scb->list, &adapter->pend_list);
1950
1951 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1952 flags);
1953
1954 return;
1955 }
1956
1957 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1958 }
1959
1960 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1961
1962
1963 return;
1964 }
1965
1966
1967 /**
1968 * megaraid_mbox_prepare_pthru - prepare a command for physical devices
1969 * @adapter - pointer to controller's soft state
1970 * @scb - scsi control block
1971 * @scp - scsi command from the mid-layer
1972 *
1973 * prepare a command for the scsi physical devices
1974 */
1975 static void
1976 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1977 struct scsi_cmnd *scp)
1978 {
1979 mbox_ccb_t *ccb;
1980 mraid_passthru_t *pthru;
1981 uint8_t channel;
1982 uint8_t target;
1983
1984 ccb = (mbox_ccb_t *)scb->ccb;
1985 pthru = ccb->pthru;
1986 channel = scb->dev_channel;
1987 target = scb->dev_target;
1988
1989 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1990 pthru->timeout = 4;
1991 pthru->ars = 1;
1992 pthru->islogical = 0;
1993 pthru->channel = 0;
1994 pthru->target = (channel << 4) | target;
1995 pthru->logdrv = SCP2LUN(scp);
1996 pthru->reqsenselen = 14;
1997 pthru->cdblen = scp->cmd_len;
1998
1999 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2000
2001 if (scp->request_bufflen) {
2002 pthru->dataxferlen = scp->request_bufflen;
2003 pthru->dataxferaddr = ccb->sgl_dma_h;
2004 pthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2005 }
2006 else {
2007 pthru->dataxferaddr = 0;
2008 pthru->dataxferlen = 0;
2009 pthru->numsge = 0;
2010 }
2011 return;
2012 }
2013
2014
2015 /**
2016 * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2017 * @adapter - pointer to controller's soft state
2018 * @scb - scsi control block
2019 * @scp - scsi command from the mid-layer
2020 *
2021 * prepare a command for the scsi physical devices. This rountine prepares
2022 * commands for devices which can take extended CDBs (>10 bytes)
2023 */
2024 static void
2025 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2026 struct scsi_cmnd *scp)
2027 {
2028 mbox_ccb_t *ccb;
2029 mraid_epassthru_t *epthru;
2030 uint8_t channel;
2031 uint8_t target;
2032
2033 ccb = (mbox_ccb_t *)scb->ccb;
2034 epthru = ccb->epthru;
2035 channel = scb->dev_channel;
2036 target = scb->dev_target;
2037
2038 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2039 epthru->timeout = 4;
2040 epthru->ars = 1;
2041 epthru->islogical = 0;
2042 epthru->channel = 0;
2043 epthru->target = (channel << 4) | target;
2044 epthru->logdrv = SCP2LUN(scp);
2045 epthru->reqsenselen = 14;
2046 epthru->cdblen = scp->cmd_len;
2047
2048 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2049
2050 if (scp->request_bufflen) {
2051 epthru->dataxferlen = scp->request_bufflen;
2052 epthru->dataxferaddr = ccb->sgl_dma_h;
2053 epthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2054 }
2055 else {
2056 epthru->dataxferaddr = 0;
2057 epthru->dataxferlen = 0;
2058 epthru->numsge = 0;
2059 }
2060 return;
2061 }
2062
2063
2064 /**
2065 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2066 * @adapter - controller's soft state
2067 *
2068 * Interrupt ackrowledgement sequence for memory mapped HBAs. Find out the
2069 * completed command and put them on the completed list for later processing.
2070 *
2071 * Returns: 1 if the interrupt is valid, 0 otherwise
2072 */
2073 static int
2074 megaraid_ack_sequence(adapter_t *adapter)
2075 {
2076 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2077 mbox_t *mbox;
2078 scb_t *scb;
2079 uint8_t nstatus;
2080 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS];
2081 struct list_head clist;
2082 int handled;
2083 uint32_t dword;
2084 unsigned long flags;
2085 int i, j;
2086
2087
2088 mbox = raid_dev->mbox;
2089
2090 // move the SCBs from the firmware completed array to our local list
2091 INIT_LIST_HEAD(&clist);
2092
2093 // loop till F/W has more commands for us to complete
2094 handled = 0;
2095 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2096 do {
2097 /*
2098 * Check if a valid interrupt is pending. If found, force the
2099 * interrupt line low.
2100 */
2101 dword = RDOUTDOOR(raid_dev);
2102 if (dword != 0x10001234) break;
2103
2104 handled = 1;
2105
2106 WROUTDOOR(raid_dev, 0x10001234);
2107
2108 nstatus = 0;
2109 // wait for valid numstatus to post
2110 for (i = 0; i < 0xFFFFF; i++) {
2111 if (mbox->numstatus != 0xFF) {
2112 nstatus = mbox->numstatus;
2113 break;
2114 }
2115 rmb();
2116 }
2117 mbox->numstatus = 0xFF;
2118
2119 adapter->outstanding_cmds -= nstatus;
2120
2121 for (i = 0; i < nstatus; i++) {
2122
2123 // wait for valid command index to post
2124 for (j = 0; j < 0xFFFFF; j++) {
2125 if (mbox->completed[i] != 0xFF) break;
2126 rmb();
2127 }
2128 completed[i] = mbox->completed[i];
2129 mbox->completed[i] = 0xFF;
2130
2131 if (completed[i] == 0xFF) {
2132 con_log(CL_ANN, (KERN_CRIT
2133 "megaraid: command posting timed out\n"));
2134
2135 BUG();
2136 continue;
2137 }
2138
2139 // Get SCB associated with this command id
2140 if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2141 // a cmm command
2142 scb = adapter->uscb_list + (completed[i] -
2143 MBOX_MAX_SCSI_CMDS);
2144 }
2145 else {
2146 // an os command
2147 scb = adapter->kscb_list + completed[i];
2148 }
2149
2150 scb->status = mbox->status;
2151 list_add_tail(&scb->list, &clist);
2152 }
2153
2154 // Acknowledge interrupt
2155 WRINDOOR(raid_dev, 0x02);
2156
2157 } while(1);
2158
2159 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2160
2161
2162 // put the completed commands in the completed list. DPC would
2163 // complete these commands later
2164 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2165
2166 list_splice(&clist, &adapter->completed_list);
2167
2168 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2169
2170
2171 // schedule the DPC if there is some work for it
2172 if (handled)
2173 tasklet_schedule(&adapter->dpc_h);
2174
2175 return handled;
2176 }
2177
2178
2179 /**
2180 * megaraid_isr - isr for memory based mailbox based controllers
2181 * @irq - irq
2182 * @devp - pointer to our soft state
2183 * @regs - unused
2184 *
2185 * Interrupt service routine for memory-mapped mailbox controllers.
2186 */
2187 static irqreturn_t
2188 megaraid_isr(int irq, void *devp, struct pt_regs *regs)
2189 {
2190 adapter_t *adapter = devp;
2191 int handled;
2192
2193 handled = megaraid_ack_sequence(adapter);
2194
2195 /* Loop through any pending requests */
2196 if (!adapter->quiescent) {
2197 megaraid_mbox_runpendq(adapter, NULL);
2198 }
2199
2200 return IRQ_RETVAL(handled);
2201 }
2202
2203
2204 /**
2205 * megaraid_mbox_sync_scb - sync kernel buffers
2206 * @adapter : controller's soft state
2207 * @scb : pointer to the resource packet
2208 *
2209 * DMA sync if required.
2210 */
2211 static void
2212 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2213 {
2214 mbox_ccb_t *ccb;
2215
2216 ccb = (mbox_ccb_t *)scb->ccb;
2217
2218 switch (scb->dma_type) {
2219
2220 case MRAID_DMA_WBUF:
2221 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2222 pci_dma_sync_single_for_cpu(adapter->pdev,
2223 ccb->buf_dma_h,
2224 scb->scp->request_bufflen,
2225 PCI_DMA_FROMDEVICE);
2226 }
2227
2228 pci_unmap_page(adapter->pdev, ccb->buf_dma_h,
2229 scb->scp->request_bufflen, scb->dma_direction);
2230
2231 break;
2232
2233 case MRAID_DMA_WSG:
2234 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2235 pci_dma_sync_sg_for_cpu(adapter->pdev,
2236 scb->scp->request_buffer,
2237 scb->scp->use_sg, PCI_DMA_FROMDEVICE);
2238 }
2239
2240 pci_unmap_sg(adapter->pdev, scb->scp->request_buffer,
2241 scb->scp->use_sg, scb->dma_direction);
2242
2243 break;
2244
2245 default:
2246 break;
2247 }
2248
2249 return;
2250 }
2251
2252
2253 /**
2254 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2255 * @devp : pointer to HBA soft state
2256 *
2257 * Pick up the commands from the completed list and send back to the owners.
2258 * This is a reentrant function and does not assume any locks are held while
2259 * it is being called.
2260 */
2261 static void
2262 megaraid_mbox_dpc(unsigned long devp)
2263 {
2264 adapter_t *adapter = (adapter_t *)devp;
2265 mraid_device_t *raid_dev;
2266 struct list_head clist;
2267 struct scatterlist *sgl;
2268 scb_t *scb;
2269 scb_t *tmp;
2270 struct scsi_cmnd *scp;
2271 mraid_passthru_t *pthru;
2272 mraid_epassthru_t *epthru;
2273 mbox_ccb_t *ccb;
2274 int islogical;
2275 int pdev_index;
2276 int pdev_state;
2277 mbox_t *mbox;
2278 unsigned long flags;
2279 uint8_t c;
2280 int status;
2281 uioc_t *kioc;
2282
2283
2284 if (!adapter) return;
2285
2286 raid_dev = ADAP2RAIDDEV(adapter);
2287
2288 // move the SCBs from the completed list to our local list
2289 INIT_LIST_HEAD(&clist);
2290
2291 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2292
2293 list_splice_init(&adapter->completed_list, &clist);
2294
2295 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2296
2297
2298 list_for_each_entry_safe(scb, tmp, &clist, list) {
2299
2300 status = scb->status;
2301 scp = scb->scp;
2302 ccb = (mbox_ccb_t *)scb->ccb;
2303 pthru = ccb->pthru;
2304 epthru = ccb->epthru;
2305 mbox = ccb->mbox;
2306
2307 // Make sure f/w has completed a valid command
2308 if (scb->state != SCB_ISSUED) {
2309 con_log(CL_ANN, (KERN_CRIT
2310 "megaraid critical err: invalid command %d:%d:%p\n",
2311 scb->sno, scb->state, scp));
2312 BUG();
2313 continue; // Must never happen!
2314 }
2315
2316 // check for the management command and complete it right away
2317 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2318 scb->state = SCB_FREE;
2319 scb->status = status;
2320
2321 // remove from local clist
2322 list_del_init(&scb->list);
2323
2324 kioc = (uioc_t *)scb->gp;
2325 kioc->status = 0;
2326
2327 megaraid_mbox_mm_done(adapter, scb);
2328
2329 continue;
2330 }
2331
2332 // Was an abort issued for this command earlier
2333 if (scb->state & SCB_ABORT) {
2334 con_log(CL_ANN, (KERN_NOTICE
2335 "megaraid: aborted cmd %lx[%x] completed\n",
2336 scp->serial_number, scb->sno));
2337 }
2338
2339 /*
2340 * If the inquiry came of a disk drive which is not part of
2341 * any RAID array, expose it to the kernel. For this to be
2342 * enabled, user must set the "megaraid_expose_unconf_disks"
2343 * flag to 1 by specifying it on module parameter list.
2344 * This would enable data migration off drives from other
2345 * configurations.
2346 */
2347 islogical = MRAID_IS_LOGICAL(adapter, scp);
2348 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2349 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2350
2351 if (scp->use_sg) {
2352 sgl = (struct scatterlist *)
2353 scp->request_buffer;
2354
2355 if (sgl->page) {
2356 c = *(unsigned char *)
2357 (page_address((&sgl[0])->page) +
2358 (&sgl[0])->offset);
2359 }
2360 else {
2361 con_log(CL_ANN, (KERN_WARNING
2362 "megaraid mailbox: invalid sg:%d\n",
2363 __LINE__));
2364 c = 0;
2365 }
2366 }
2367 else {
2368 c = *(uint8_t *)scp->request_buffer;
2369 }
2370
2371 if ((c & 0x1F ) == TYPE_DISK) {
2372 pdev_index = (scb->dev_channel * 16) +
2373 scb->dev_target;
2374 pdev_state =
2375 raid_dev->pdrv_state[pdev_index] & 0x0F;
2376
2377 if (pdev_state == PDRV_ONLINE ||
2378 pdev_state == PDRV_FAILED ||
2379 pdev_state == PDRV_RBLD ||
2380 pdev_state == PDRV_HOTSPARE ||
2381 megaraid_expose_unconf_disks == 0) {
2382
2383 status = 0xF0;
2384 }
2385 }
2386 }
2387
2388 // Convert MegaRAID status to Linux error code
2389 switch (status) {
2390
2391 case 0x00:
2392
2393 scp->result = (DID_OK << 16);
2394 break;
2395
2396 case 0x02:
2397
2398 /* set sense_buffer and result fields */
2399 if (mbox->cmd == MBOXCMD_PASSTHRU ||
2400 mbox->cmd == MBOXCMD_PASSTHRU64) {
2401
2402 memcpy(scp->sense_buffer, pthru->reqsensearea,
2403 14);
2404
2405 scp->result = DRIVER_SENSE << 24 |
2406 DID_OK << 16 | CHECK_CONDITION << 1;
2407 }
2408 else {
2409 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2410
2411 memcpy(scp->sense_buffer,
2412 epthru->reqsensearea, 14);
2413
2414 scp->result = DRIVER_SENSE << 24 |
2415 DID_OK << 16 |
2416 CHECK_CONDITION << 1;
2417 } else {
2418 scp->sense_buffer[0] = 0x70;
2419 scp->sense_buffer[2] = ABORTED_COMMAND;
2420 scp->result = CHECK_CONDITION << 1;
2421 }
2422 }
2423 break;
2424
2425 case 0x08:
2426
2427 scp->result = DID_BUS_BUSY << 16 | status;
2428 break;
2429
2430 default:
2431
2432 /*
2433 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2434 * failed
2435 */
2436 if (scp->cmnd[0] == TEST_UNIT_READY) {
2437 scp->result = DID_ERROR << 16 |
2438 RESERVATION_CONFLICT << 1;
2439 }
2440 else
2441 /*
2442 * Error code returned is 1 if Reserve or Release
2443 * failed or the input parameter is invalid
2444 */
2445 if (status == 1 && (scp->cmnd[0] == RESERVE ||
2446 scp->cmnd[0] == RELEASE)) {
2447
2448 scp->result = DID_ERROR << 16 |
2449 RESERVATION_CONFLICT << 1;
2450 }
2451 else {
2452 scp->result = DID_BAD_TARGET << 16 | status;
2453 }
2454 }
2455
2456 // print a debug message for all failed commands
2457 if (status) {
2458 megaraid_mbox_display_scb(adapter, scb);
2459 }
2460
2461 // Free our internal resources and call the mid-layer callback
2462 // routine
2463 megaraid_mbox_sync_scb(adapter, scb);
2464
2465 // remove from local clist
2466 list_del_init(&scb->list);
2467
2468 // put back in free list
2469 megaraid_dealloc_scb(adapter, scb);
2470
2471 // send the scsi packet back to kernel
2472 scp->scsi_done(scp);
2473 }
2474
2475 return;
2476 }
2477
2478
2479 /**
2480 * megaraid_abort_handler - abort the scsi command
2481 * @scp : command to be aborted
2482 *
2483 * Abort a previous SCSI request. Only commands on the pending list can be
2484 * aborted. All the commands issued to the F/W must complete.
2485 **/
2486 static int
2487 megaraid_abort_handler(struct scsi_cmnd *scp)
2488 {
2489 adapter_t *adapter;
2490 mraid_device_t *raid_dev;
2491 scb_t *scb;
2492 scb_t *tmp;
2493 int found;
2494 unsigned long flags;
2495 int i;
2496
2497
2498 adapter = SCP2ADAPTER(scp);
2499 raid_dev = ADAP2RAIDDEV(adapter);
2500
2501 con_log(CL_ANN, (KERN_WARNING
2502 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2503 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2504 SCP2TARGET(scp), SCP2LUN(scp)));
2505
2506 // If FW has stopped responding, simply return failure
2507 if (raid_dev->hw_error) {
2508 con_log(CL_ANN, (KERN_NOTICE
2509 "megaraid: hw error, not aborting\n"));
2510 return FAILED;
2511 }
2512
2513 // There might a race here, where the command was completed by the
2514 // firmware and now it is on the completed list. Before we could
2515 // complete the command to the kernel in dpc, the abort came.
2516 // Find out if this is the case to avoid the race.
2517 scb = NULL;
2518 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2519 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2520
2521 if (scb->scp == scp) { // Found command
2522
2523 list_del_init(&scb->list); // from completed list
2524
2525 con_log(CL_ANN, (KERN_WARNING
2526 "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2527 scp->serial_number, scb->sno,
2528 scb->dev_channel, scb->dev_target));
2529
2530 scp->result = (DID_ABORT << 16);
2531 scp->scsi_done(scp);
2532
2533 megaraid_dealloc_scb(adapter, scb);
2534
2535 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2536 flags);
2537
2538 return SUCCESS;
2539 }
2540 }
2541 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2542
2543
2544 // Find out if this command is still on the pending list. If it is and
2545 // was never issued, abort and return success. If the command is owned
2546 // by the firmware, we must wait for it to complete by the FW.
2547 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2548 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2549
2550 if (scb->scp == scp) { // Found command
2551
2552 list_del_init(&scb->list); // from pending list
2553
2554 ASSERT(!(scb->state & SCB_ISSUED));
2555
2556 con_log(CL_ANN, (KERN_WARNING
2557 "megaraid abort: %ld[%d:%d], driver owner\n",
2558 scp->serial_number, scb->dev_channel,
2559 scb->dev_target));
2560
2561 scp->result = (DID_ABORT << 16);
2562 scp->scsi_done(scp);
2563
2564 megaraid_dealloc_scb(adapter, scb);
2565
2566 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2567 flags);
2568
2569 return SUCCESS;
2570 }
2571 }
2572 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2573
2574
2575 // Check do we even own this command, in which case this would be
2576 // owned by the firmware. The only way to locate the FW scb is to
2577 // traverse through the list of all SCB, since driver does not
2578 // maintain these SCBs on any list
2579 found = 0;
2580 spin_lock_irq(&adapter->lock);
2581 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2582 scb = adapter->kscb_list + i;
2583
2584 if (scb->scp == scp) {
2585
2586 found = 1;
2587
2588 if (!(scb->state & SCB_ISSUED)) {
2589 con_log(CL_ANN, (KERN_WARNING
2590 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2591 scp->serial_number, scb->sno, scb->dev_channel,
2592 scb->dev_target));
2593 BUG();
2594 }
2595 else {
2596 con_log(CL_ANN, (KERN_WARNING
2597 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2598 scp->serial_number, scb->sno, scb->dev_channel,
2599 scb->dev_target));
2600 }
2601 }
2602 }
2603 spin_unlock_irq(&adapter->lock);
2604
2605 if (!found) {
2606 con_log(CL_ANN, (KERN_WARNING
2607 "megaraid abort: scsi cmd:%ld, do now own\n",
2608 scp->serial_number));
2609
2610 // FIXME: Should there be a callback for this command?
2611 return SUCCESS;
2612 }
2613
2614 // We cannot actually abort a command owned by firmware, return
2615 // failure and wait for reset. In host reset handler, we will find out
2616 // if the HBA is still live
2617 return FAILED;
2618 }
2619
2620 /**
2621 * megaraid_reset_handler - device reset hadler for mailbox based driver
2622 * @scp : reference command
2623 *
2624 * Reset handler for the mailbox based controller. First try to find out if
2625 * the FW is still live, in which case the outstanding commands counter mut go
2626 * down to 0. If that happens, also issue the reservation reset command to
2627 * relinquish (possible) reservations on the logical drives connected to this
2628 * host
2629 **/
2630 static int
2631 megaraid_reset_handler(struct scsi_cmnd *scp)
2632 {
2633 adapter_t *adapter;
2634 scb_t *scb;
2635 scb_t *tmp;
2636 mraid_device_t *raid_dev;
2637 unsigned long flags;
2638 uint8_t raw_mbox[sizeof(mbox_t)];
2639 int rval;
2640 int recovery_window;
2641 int recovering;
2642 int i;
2643 uioc_t *kioc;
2644
2645 adapter = SCP2ADAPTER(scp);
2646 raid_dev = ADAP2RAIDDEV(adapter);
2647
2648 // return failure if adapter is not responding
2649 if (raid_dev->hw_error) {
2650 con_log(CL_ANN, (KERN_NOTICE
2651 "megaraid: hw error, cannot reset\n"));
2652 return FAILED;
2653 }
2654
2655
2656 // Under exceptional conditions, FW can take up to 3 minutes to
2657 // complete command processing. Wait for additional 2 minutes for the
2658 // pending commands counter to go down to 0. If it doesn't, let the
2659 // controller be marked offline
2660 // Also, reset all the commands currently owned by the driver
2661 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2662 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2663 list_del_init(&scb->list); // from pending list
2664
2665 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2666 con_log(CL_ANN, (KERN_WARNING
2667 "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2668 scb->sno, scb->dev_channel, scb->dev_target));
2669
2670 scb->status = -1;
2671
2672 kioc = (uioc_t *)scb->gp;
2673 kioc->status = -EFAULT;
2674
2675 megaraid_mbox_mm_done(adapter, scb);
2676 } else {
2677 if (scb->scp == scp) { // Found command
2678 con_log(CL_ANN, (KERN_WARNING
2679 "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2680 scp->serial_number, scb->sno,
2681 scb->dev_channel, scb->dev_target));
2682 } else {
2683 con_log(CL_ANN, (KERN_WARNING
2684 "megaraid: IO packet with %d[%d:%d] being reset\n",
2685 scb->sno, scb->dev_channel, scb->dev_target));
2686 }
2687
2688 scb->scp->result = (DID_RESET << 16);
2689 scb->scp->scsi_done(scb->scp);
2690
2691 megaraid_dealloc_scb(adapter, scb);
2692 }
2693 }
2694 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2695
2696 if (adapter->outstanding_cmds) {
2697 con_log(CL_ANN, (KERN_NOTICE
2698 "megaraid: %d outstanding commands. Max wait %d sec\n",
2699 adapter->outstanding_cmds,
2700 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
2701 }
2702
2703 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2704
2705 recovering = adapter->outstanding_cmds;
2706
2707 for (i = 0; i < recovery_window; i++) {
2708
2709 megaraid_ack_sequence(adapter);
2710
2711 // print a message once every 5 seconds only
2712 if (!(i % 5)) {
2713 con_log(CL_ANN, (
2714 "megaraid mbox: Wait for %d commands to complete:%d\n",
2715 adapter->outstanding_cmds,
2716 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
2717 }
2718
2719 // bailout if no recovery happended in reset time
2720 if (adapter->outstanding_cmds == 0) {
2721 break;
2722 }
2723
2724 msleep(1000);
2725 }
2726
2727 spin_lock(&adapter->lock);
2728
2729 // If still outstanding commands, bail out
2730 if (adapter->outstanding_cmds) {
2731 con_log(CL_ANN, (KERN_WARNING
2732 "megaraid mbox: critical hardware error!\n"));
2733
2734 raid_dev->hw_error = 1;
2735
2736 rval = FAILED;
2737 goto out;
2738 }
2739 else {
2740 con_log(CL_ANN, (KERN_NOTICE
2741 "megaraid mbox: reset sequence completed sucessfully\n"));
2742 }
2743
2744
2745 // If the controller supports clustering, reset reservations
2746 if (!adapter->ha) {
2747 rval = SUCCESS;
2748 goto out;
2749 }
2750
2751 // clear reservations if any
2752 raw_mbox[0] = CLUSTER_CMD;
2753 raw_mbox[2] = RESET_RESERVATIONS;
2754
2755 rval = SUCCESS;
2756 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2757 con_log(CL_ANN,
2758 (KERN_INFO "megaraid: reservation reset\n"));
2759 }
2760 else {
2761 rval = FAILED;
2762 con_log(CL_ANN, (KERN_WARNING
2763 "megaraid: reservation reset failed\n"));
2764 }
2765
2766 out:
2767 spin_unlock_irq(&adapter->lock);
2768 return rval;
2769 }
2770
2771 /*
2772 * START: internal commands library
2773 *
2774 * This section of the driver has the common routine used by the driver and
2775 * also has all the FW routines
2776 */
2777
2778 /**
2779 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2780 * @adapter - controller's soft state
2781 * @raw_mbox - the mailbox
2782 *
2783 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2784 * controllers
2785 */
2786 static int
2787 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2788 {
2789 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2790 mbox64_t *mbox64;
2791 mbox_t *mbox;
2792 uint8_t status;
2793 int i;
2794
2795
2796 mbox64 = raid_dev->mbox64;
2797 mbox = raid_dev->mbox;
2798
2799 /*
2800 * Wait until mailbox is free
2801 */
2802 if (megaraid_busywait_mbox(raid_dev) != 0)
2803 goto blocked_mailbox;
2804
2805 /*
2806 * Copy mailbox data into host structure
2807 */
2808 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2809 mbox->cmdid = 0xFE;
2810 mbox->busy = 1;
2811 mbox->poll = 0;
2812 mbox->ack = 0;
2813 mbox->numstatus = 0xFF;
2814 mbox->status = 0xFF;
2815
2816 wmb();
2817 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2818
2819 // wait for maximum 1 second for status to post. If the status is not
2820 // available within 1 second, assume FW is initializing and wait
2821 // for an extended amount of time
2822 if (mbox->numstatus == 0xFF) { // status not yet available
2823 udelay(25);
2824
2825 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2826 rmb();
2827 msleep(1);
2828 }
2829
2830
2831 if (i == 1000) {
2832 con_log(CL_ANN, (KERN_NOTICE
2833 "megaraid mailbox: wait for FW to boot "));
2834
2835 for (i = 0; (mbox->numstatus == 0xFF) &&
2836 (i < MBOX_RESET_WAIT); i++) {
2837 rmb();
2838 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2839 MBOX_RESET_WAIT - i));
2840 msleep(1000);
2841 }
2842
2843 if (i == MBOX_RESET_WAIT) {
2844
2845 con_log(CL_ANN, (
2846 "\nmegaraid mailbox: status not available\n"));
2847
2848 return -1;
2849 }
2850 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2851 }
2852 }
2853
2854 // wait for maximum 1 second for poll semaphore
2855 if (mbox->poll != 0x77) {
2856 udelay(25);
2857
2858 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2859 rmb();
2860 msleep(1);
2861 }
2862
2863 if (i == 1000) {
2864 con_log(CL_ANN, (KERN_WARNING
2865 "megaraid mailbox: could not get poll semaphore\n"));
2866 return -1;
2867 }
2868 }
2869
2870 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2871 wmb();
2872
2873 // wait for maximum 1 second for acknowledgement
2874 if (RDINDOOR(raid_dev) & 0x2) {
2875 udelay(25);
2876
2877 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2878 rmb();
2879 msleep(1);
2880 }
2881
2882 if (i == 1000) {
2883 con_log(CL_ANN, (KERN_WARNING
2884 "megaraid mailbox: could not acknowledge\n"));
2885 return -1;
2886 }
2887 }
2888 mbox->poll = 0;
2889 mbox->ack = 0x77;
2890
2891 status = mbox->status;
2892
2893 // invalidate the completed command id array. After command
2894 // completion, firmware would write the valid id.
2895 mbox->numstatus = 0xFF;
2896 mbox->status = 0xFF;
2897 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2898 mbox->completed[i] = 0xFF;
2899 }
2900
2901 return status;
2902
2903 blocked_mailbox:
2904
2905 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2906 return -1;
2907 }
2908
2909
2910 /**
2911 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2912 * @adapter - controller's soft state
2913 * @raw_mbox - the mailbox
2914 *
2915 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2916 * controllers. This is a faster version of the synchronous command and
2917 * therefore can be called in interrupt-context as well
2918 */
2919 static int
2920 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2921 {
2922 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2923 mbox_t *mbox;
2924 long i;
2925
2926
2927 mbox = raid_dev->mbox;
2928
2929 // return immediately if the mailbox is busy
2930 if (mbox->busy) return -1;
2931
2932 // Copy mailbox data into host structure
2933 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2934 mbox->cmdid = 0xFE;
2935 mbox->busy = 1;
2936 mbox->poll = 0;
2937 mbox->ack = 0;
2938 mbox->numstatus = 0xFF;
2939 mbox->status = 0xFF;
2940
2941 wmb();
2942 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2943
2944 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
2945 if (mbox->numstatus != 0xFF) break;
2946 rmb();
2947 udelay(MBOX_SYNC_DELAY_200);
2948 }
2949
2950 if (i == MBOX_SYNC_WAIT_CNT) {
2951 // We may need to re-calibrate the counter
2952 con_log(CL_ANN, (KERN_CRIT
2953 "megaraid: fast sync command timed out\n"));
2954 }
2955
2956 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2957 wmb();
2958
2959 return mbox->status;
2960 }
2961
2962
2963 /**
2964 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
2965 * @raid_dev - RAID device (HBA) soft state
2966 *
2967 * wait until the controller's mailbox is available to accept more commands.
2968 * wait for at most 1 second
2969 */
2970 static int
2971 megaraid_busywait_mbox(mraid_device_t *raid_dev)
2972 {
2973 mbox_t *mbox = raid_dev->mbox;
2974 int i = 0;
2975
2976 if (mbox->busy) {
2977 udelay(25);
2978 for (i = 0; mbox->busy && i < 1000; i++)
2979 msleep(1);
2980 }
2981
2982 if (i < 1000) return 0;
2983 else return -1;
2984 }
2985
2986
2987 /**
2988 * megaraid_mbox_product_info - some static information about the controller
2989 * @adapter - our soft state
2990 *
2991 * issue commands to the controller to grab some parameters required by our
2992 * caller.
2993 */
2994 static int
2995 megaraid_mbox_product_info(adapter_t *adapter)
2996 {
2997 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2998 mbox_t *mbox;
2999 uint8_t raw_mbox[sizeof(mbox_t)];
3000 mraid_pinfo_t *pinfo;
3001 dma_addr_t pinfo_dma_h;
3002 mraid_inquiry3_t *mraid_inq3;
3003 int i;
3004
3005
3006 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3007 mbox = (mbox_t *)raw_mbox;
3008
3009 /*
3010 * Issue an ENQUIRY3 command to find out certain adapter parameters,
3011 * e.g., max channels, max commands etc.
3012 */
3013 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3014 &pinfo_dma_h);
3015
3016 if (pinfo == NULL) {
3017 con_log(CL_ANN, (KERN_WARNING
3018 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3019 __LINE__));
3020
3021 return -1;
3022 }
3023 memset(pinfo, 0, sizeof(mraid_pinfo_t));
3024
3025 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3026 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3027
3028 raw_mbox[0] = FC_NEW_CONFIG;
3029 raw_mbox[2] = NC_SUBOP_ENQUIRY3;
3030 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
3031
3032 // Issue the command
3033 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3034
3035 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3036
3037 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3038 pinfo, pinfo_dma_h);
3039
3040 return -1;
3041 }
3042
3043 /*
3044 * Collect information about state of each physical drive
3045 * attached to the controller. We will expose all the disks
3046 * which are not part of RAID
3047 */
3048 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3049 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3050 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3051 }
3052
3053 /*
3054 * Get product info for information like number of channels,
3055 * maximum commands supported.
3056 */
3057 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3058 mbox->xferaddr = (uint32_t)pinfo_dma_h;
3059
3060 raw_mbox[0] = FC_NEW_CONFIG;
3061 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3062
3063 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3064
3065 con_log(CL_ANN, (KERN_WARNING
3066 "megaraid: product info failed\n"));
3067
3068 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3069 pinfo, pinfo_dma_h);
3070
3071 return -1;
3072 }
3073
3074 /*
3075 * Setup some parameters for host, as required by our caller
3076 */
3077 adapter->max_channel = pinfo->nchannels;
3078
3079 /*
3080 * we will export all the logical drives on a single channel.
3081 * Add 1 since inquires do not come for inititor ID
3082 */
3083 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1;
3084 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices
3085
3086 /*
3087 * These are the maximum outstanding commands for the scsi-layer
3088 */
3089 adapter->max_cmds = MBOX_MAX_SCSI_CMDS;
3090
3091 memset(adapter->fw_version, 0, VERSION_SIZE);
3092 memset(adapter->bios_version, 0, VERSION_SIZE);
3093
3094 memcpy(adapter->fw_version, pinfo->fw_version, 4);
3095 adapter->fw_version[4] = 0;
3096
3097 memcpy(adapter->bios_version, pinfo->bios_version, 4);
3098 adapter->bios_version[4] = 0;
3099
3100 con_log(CL_ANN, (KERN_NOTICE
3101 "megaraid: fw version:[%s] bios version:[%s]\n",
3102 adapter->fw_version, adapter->bios_version));
3103
3104 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3105 pinfo_dma_h);
3106
3107 return 0;
3108 }
3109
3110
3111
3112 /**
3113 * megaraid_mbox_extended_cdb - check for support for extended CDBs
3114 * @adapter - soft state for the controller
3115 *
3116 * this routine check whether the controller in question supports extended
3117 * ( > 10 bytes ) CDBs
3118 */
3119 static int
3120 megaraid_mbox_extended_cdb(adapter_t *adapter)
3121 {
3122 mbox_t *mbox;
3123 uint8_t raw_mbox[sizeof(mbox_t)];
3124 int rval;
3125
3126 mbox = (mbox_t *)raw_mbox;
3127
3128 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3129 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3130
3131 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3132
3133 raw_mbox[0] = MAIN_MISC_OPCODE;
3134 raw_mbox[2] = SUPPORT_EXT_CDB;
3135
3136 /*
3137 * Issue the command
3138 */
3139 rval = 0;
3140 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3141 rval = -1;
3142 }
3143
3144 return rval;
3145 }
3146
3147
3148 /**
3149 * megaraid_mbox_support_ha - Do we support clustering
3150 * @adapter - soft state for the controller
3151 * @init_id - ID of the initiator
3152 *
3153 * Determine if the firmware supports clustering and the ID of the initiator.
3154 */
3155 static int
3156 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3157 {
3158 mbox_t *mbox;
3159 uint8_t raw_mbox[sizeof(mbox_t)];
3160 int rval;
3161
3162
3163 mbox = (mbox_t *)raw_mbox;
3164
3165 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3166
3167 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3168
3169 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3170
3171 raw_mbox[0] = GET_TARGET_ID;
3172
3173 // Issue the command
3174 *init_id = 7;
3175 rval = -1;
3176 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3177
3178 *init_id = *(uint8_t *)adapter->ibuf;
3179
3180 con_log(CL_ANN, (KERN_INFO
3181 "megaraid: cluster firmware, initiator ID: %d\n",
3182 *init_id));
3183
3184 rval = 0;
3185 }
3186
3187 return rval;
3188 }
3189
3190
3191 /**
3192 * megaraid_mbox_support_random_del - Do we support random deletion
3193 * @adapter - soft state for the controller
3194 *
3195 * Determine if the firmware supports random deletion
3196 * Return: 1 is operation supported, 0 otherwise
3197 */
3198 static int
3199 megaraid_mbox_support_random_del(adapter_t *adapter)
3200 {
3201 mbox_t *mbox;
3202 uint8_t raw_mbox[sizeof(mbox_t)];
3203 int rval;
3204
3205
3206 mbox = (mbox_t *)raw_mbox;
3207
3208 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3209
3210 raw_mbox[0] = FC_DEL_LOGDRV;
3211 raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3212
3213 // Issue the command
3214 rval = 0;
3215 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3216
3217 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3218
3219 rval = 1;
3220 }
3221
3222 return rval;
3223 }
3224
3225
3226 /**
3227 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3228 * @adapter - soft state for the controller
3229 *
3230 * Find out the maximum number of scatter-gather elements supported by the
3231 * firmware
3232 */
3233 static int
3234 megaraid_mbox_get_max_sg(adapter_t *adapter)
3235 {
3236 mbox_t *mbox;
3237 uint8_t raw_mbox[sizeof(mbox_t)];
3238 int nsg;
3239
3240
3241 mbox = (mbox_t *)raw_mbox;
3242
3243 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3244
3245 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3246
3247 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3248
3249 raw_mbox[0] = MAIN_MISC_OPCODE;
3250 raw_mbox[2] = GET_MAX_SG_SUPPORT;
3251
3252 // Issue the command
3253 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3254 nsg = *(uint8_t *)adapter->ibuf;
3255 }
3256 else {
3257 nsg = MBOX_DEFAULT_SG_SIZE;
3258 }
3259
3260 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3261
3262 return nsg;
3263 }
3264
3265
3266 /**
3267 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3268 * @adapter - soft state for the controller
3269 *
3270 * Enumerate the RAID and SCSI channels for ROMB platoforms so that channels
3271 * can be exported as regular SCSI channels
3272 */
3273 static void
3274 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3275 {
3276 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3277 mbox_t *mbox;
3278 uint8_t raw_mbox[sizeof(mbox_t)];
3279
3280
3281 mbox = (mbox_t *)raw_mbox;
3282
3283 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3284
3285 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3286
3287 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3288
3289 raw_mbox[0] = CHNL_CLASS;
3290 raw_mbox[2] = GET_CHNL_CLASS;
3291
3292 // Issue the command. If the command fails, all channels are RAID
3293 // channels
3294 raid_dev->channel_class = 0xFF;
3295 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3296 raid_dev->channel_class = *(uint8_t *)adapter->ibuf;
3297 }
3298
3299 return;
3300 }
3301
3302
3303 /**
3304 * megaraid_mbox_flush_cache - flush adapter and disks cache
3305 * @param adapter : soft state for the controller
3306 *
3307 * Flush adapter cache followed by disks cache
3308 */
3309 static void
3310 megaraid_mbox_flush_cache(adapter_t *adapter)
3311 {
3312 mbox_t *mbox;
3313 uint8_t raw_mbox[sizeof(mbox_t)];
3314
3315
3316 mbox = (mbox_t *)raw_mbox;
3317
3318 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3319
3320 raw_mbox[0] = FLUSH_ADAPTER;
3321
3322 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3323 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3324 }
3325
3326 raw_mbox[0] = FLUSH_SYSTEM;
3327
3328 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3329 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3330 }
3331
3332 return;
3333 }
3334
3335
3336 /**
3337 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3338 * @param adapter : controllers' soft state
3339 * @param scb : SCB to be displayed
3340 * @param level : debug level for console print
3341 *
3342 * Diplay information about the given SCB iff the current debug level is
3343 * verbose
3344 */
3345 static void
3346 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3347 {
3348 mbox_ccb_t *ccb;
3349 struct scsi_cmnd *scp;
3350 mbox_t *mbox;
3351 int level;
3352 int i;
3353
3354
3355 ccb = (mbox_ccb_t *)scb->ccb;
3356 scp = scb->scp;
3357 mbox = ccb->mbox;
3358
3359 level = CL_DLEVEL3;
3360
3361 con_log(level, (KERN_NOTICE
3362 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3363 mbox->cmd, scb->sno));
3364
3365 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3366 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3367 mbox->numsge));
3368
3369 if (!scp) return;
3370
3371 con_log(level, (KERN_NOTICE "scsi cmnd: "));
3372
3373 for (i = 0; i < scp->cmd_len; i++) {
3374 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3375 }
3376
3377 con_log(level, ("\n"));
3378
3379 return;
3380 }
3381
3382
3383 /**
3384 * megaraid_mbox_setup_device_map - manage device ids
3385 * @adapter : Driver's soft state
3386 *
3387 * Manange the device ids to have an appropraite mapping between the kernel
3388 * scsi addresses and megaraid scsi and logical drive addresses. We export
3389 * scsi devices on their actual addresses, whereas the logical drives are
3390 * exported on a virtual scsi channel.
3391 **/
3392 static void
3393 megaraid_mbox_setup_device_map(adapter_t *adapter)
3394 {
3395 uint8_t c;
3396 uint8_t t;
3397
3398 /*
3399 * First fill the values on the logical drive channel
3400 */
3401 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3402 adapter->device_ids[adapter->max_channel][t] =
3403 (t < adapter->init_id) ? t : t - 1;
3404
3405 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3406
3407 /*
3408 * Fill the values on the physical devices channels
3409 */
3410 for (c = 0; c < adapter->max_channel; c++)
3411 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3412 adapter->device_ids[c][t] = (c << 8) | t;
3413 }
3414
3415
3416 /*
3417 * END: internal commands library
3418 */
3419
3420 /*
3421 * START: Interface for the common management module
3422 *
3423 * This is the module, which interfaces with the common mangement module to
3424 * provide support for ioctl and sysfs
3425 */
3426
3427 /**
3428 * megaraid_cmm_register - register with the mangement module
3429 * @param adapter : HBA soft state
3430 *
3431 * Register with the management module, which allows applications to issue
3432 * ioctl calls to the drivers. This interface is used by the management module
3433 * to setup sysfs support as well.
3434 */
3435 static int
3436 megaraid_cmm_register(adapter_t *adapter)
3437 {
3438 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3439 mraid_mmadp_t adp;
3440 scb_t *scb;
3441 mbox_ccb_t *ccb;
3442 int rval;
3443 int i;
3444
3445 // Allocate memory for the base list of scb for management module.
3446 adapter->uscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_USER_CMDS,
3447 GFP_KERNEL);
3448
3449 if (adapter->uscb_list == NULL) {
3450 con_log(CL_ANN, (KERN_WARNING
3451 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3452 __LINE__));
3453 return -1;
3454 }
3455 memset(adapter->uscb_list, 0, sizeof(scb_t) * MBOX_MAX_USER_CMDS);
3456
3457
3458 // Initialize the synchronization parameters for resources for
3459 // commands for management module
3460 INIT_LIST_HEAD(&adapter->uscb_pool);
3461
3462 spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3463
3464
3465
3466 // link all the packets. Note, CCB for commands, coming from the
3467 // commom management module, mailbox physical address are already
3468 // setup by it. We just need placeholder for that in our local command
3469 // control blocks
3470 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3471
3472 scb = adapter->uscb_list + i;
3473 ccb = raid_dev->uccb_list + i;
3474
3475 scb->ccb = (caddr_t)ccb;
3476 ccb->mbox64 = raid_dev->umbox64 + i;
3477 ccb->mbox = &ccb->mbox64->mbox32;
3478 ccb->raw_mbox = (uint8_t *)ccb->mbox;
3479
3480 scb->gp = 0;
3481
3482 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3483 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3484 scb->sno = i + MBOX_MAX_SCSI_CMDS;
3485
3486 scb->scp = NULL;
3487 scb->state = SCB_FREE;
3488 scb->dma_direction = PCI_DMA_NONE;
3489 scb->dma_type = MRAID_DMA_NONE;
3490 scb->dev_channel = -1;
3491 scb->dev_target = -1;
3492
3493 // put scb in the free pool
3494 list_add_tail(&scb->list, &adapter->uscb_pool);
3495 }
3496
3497 adp.unique_id = adapter->unique_id;
3498 adp.drvr_type = DRVRTYPE_MBOX;
3499 adp.drvr_data = (unsigned long)adapter;
3500 adp.pdev = adapter->pdev;
3501 adp.issue_uioc = megaraid_mbox_mm_handler;
3502 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
3503 adp.max_kioc = MBOX_MAX_USER_CMDS;
3504
3505 if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3506
3507 con_log(CL_ANN, (KERN_WARNING
3508 "megaraid mbox: did not register with CMM\n"));
3509
3510 kfree(adapter->uscb_list);
3511 }
3512
3513 return rval;
3514 }
3515
3516
3517 /**
3518 * megaraid_cmm_unregister - un-register with the mangement module
3519 * @param adapter : HBA soft state
3520 *
3521 * Un-register with the management module.
3522 * FIXME: mgmt module must return failure for unregister if it has pending
3523 * commands in LLD
3524 */
3525 static int
3526 megaraid_cmm_unregister(adapter_t *adapter)
3527 {
3528 kfree(adapter->uscb_list);
3529 mraid_mm_unregister_adp(adapter->unique_id);
3530 return 0;
3531 }
3532
3533
3534 /**
3535 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3536 * @param drvr_data : LLD specific data
3537 * @param kioc : CMM interface packet
3538 * @param action : command action
3539 *
3540 * This routine is invoked whenever the Common Mangement Module (CMM) has a
3541 * command for us. The 'action' parameter specifies if this is a new command
3542 * or otherwise.
3543 */
3544 static int
3545 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3546 {
3547 adapter_t *adapter;
3548
3549 if (action != IOCTL_ISSUE) {
3550 con_log(CL_ANN, (KERN_WARNING
3551 "megaraid: unsupported management action:%#2x\n",
3552 action));
3553 return (-ENOTSUPP);
3554 }
3555
3556 adapter = (adapter_t *)drvr_data;
3557
3558 // make sure this adapter is not being detached right now.
3559 if (atomic_read(&adapter->being_detached)) {
3560 con_log(CL_ANN, (KERN_WARNING
3561 "megaraid: reject management request, detaching\n"));
3562 return (-ENODEV);
3563 }
3564
3565 switch (kioc->opcode) {
3566
3567 case GET_ADAP_INFO:
3568
3569 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *)
3570 (unsigned long)kioc->buf_vaddr);
3571
3572 kioc->done(kioc);
3573
3574 return kioc->status;
3575
3576 case MBOX_CMD:
3577
3578 return megaraid_mbox_mm_command(adapter, kioc);
3579
3580 default:
3581 kioc->status = (-EINVAL);
3582 kioc->done(kioc);
3583 return (-EINVAL);
3584 }
3585
3586 return 0; // not reached
3587 }
3588
3589 /**
3590 * megaraid_mbox_mm_command - issues commands routed through CMM
3591 * @param adapter : HBA soft state
3592 * @param kioc : management command packet
3593 *
3594 * Issues commands, which are routed through the management module.
3595 */
3596 static int
3597 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3598 {
3599 struct list_head *head = &adapter->uscb_pool;
3600 mbox64_t *mbox64;
3601 uint8_t *raw_mbox;
3602 scb_t *scb;
3603 mbox_ccb_t *ccb;
3604 unsigned long flags;
3605
3606 // detach one scb from free pool
3607 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3608
3609 if (list_empty(head)) { // should never happen because of CMM
3610
3611 con_log(CL_ANN, (KERN_WARNING
3612 "megaraid mbox: bug in cmm handler, lost resources\n"));
3613
3614 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3615
3616 return (-EINVAL);
3617 }
3618
3619 scb = list_entry(head->next, scb_t, list);
3620 list_del_init(&scb->list);
3621
3622 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3623
3624 scb->state = SCB_ACTIVE;
3625 scb->dma_type = MRAID_DMA_NONE;
3626 scb->dma_direction = PCI_DMA_NONE;
3627
3628 ccb = (mbox_ccb_t *)scb->ccb;
3629 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3630 raw_mbox = (uint8_t *)&mbox64->mbox32;
3631
3632 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3633
3634 scb->gp = (unsigned long)kioc;
3635
3636 /*
3637 * If it is a logdrv random delete operation, we have to wait till
3638 * there are no outstanding cmds at the fw and then issue it directly
3639 */
3640 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3641
3642 if (wait_till_fw_empty(adapter)) {
3643 con_log(CL_ANN, (KERN_NOTICE
3644 "megaraid mbox: LD delete, timed out\n"));
3645
3646 kioc->status = -ETIME;
3647
3648 scb->status = -1;
3649
3650 megaraid_mbox_mm_done(adapter, scb);
3651
3652 return (-ETIME);
3653 }
3654
3655 INIT_LIST_HEAD(&scb->list);
3656
3657 scb->state = SCB_ISSUED;
3658 if (mbox_post_cmd(adapter, scb) != 0) {
3659
3660 con_log(CL_ANN, (KERN_NOTICE
3661 "megaraid mbox: LD delete, mailbox busy\n"));
3662
3663 kioc->status = -EBUSY;
3664
3665 scb->status = -1;
3666
3667 megaraid_mbox_mm_done(adapter, scb);
3668
3669 return (-EBUSY);
3670 }
3671
3672 return 0;
3673 }
3674
3675 // put the command on the pending list and execute
3676 megaraid_mbox_runpendq(adapter, scb);
3677
3678 return 0;
3679 }
3680
3681
3682 static int
3683 wait_till_fw_empty(adapter_t *adapter)
3684 {
3685 unsigned long flags = 0;
3686 int i;
3687
3688
3689 /*
3690 * Set the quiescent flag to stop issuing cmds to FW.
3691 */
3692 spin_lock_irqsave(&adapter->lock, flags);
3693 adapter->quiescent++;
3694 spin_unlock_irqrestore(&adapter->lock, flags);
3695
3696 /*
3697 * Wait till there are no more cmds outstanding at FW. Try for at most
3698 * 60 seconds
3699 */
3700 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3701 con_log(CL_DLEVEL1, (KERN_INFO
3702 "megaraid: FW has %d pending commands\n",
3703 adapter->outstanding_cmds));
3704
3705 msleep(1000);
3706 }
3707
3708 return adapter->outstanding_cmds;
3709 }
3710
3711
3712 /**
3713 * megaraid_mbox_mm_done - callback for CMM commands
3714 * @adapter : HBA soft state
3715 * @scb : completed command
3716 *
3717 * Callback routine for internal commands originated from the management
3718 * module.
3719 */
3720 static void
3721 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3722 {
3723 uioc_t *kioc;
3724 mbox64_t *mbox64;
3725 uint8_t *raw_mbox;
3726 unsigned long flags;
3727
3728 kioc = (uioc_t *)scb->gp;
3729 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3730 mbox64->mbox32.status = scb->status;
3731 raw_mbox = (uint8_t *)&mbox64->mbox32;
3732
3733
3734 // put scb in the free pool
3735 scb->state = SCB_FREE;
3736 scb->scp = NULL;
3737
3738 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3739
3740 list_add(&scb->list, &adapter->uscb_pool);
3741
3742 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3743
3744 // if a delete logical drive operation succeeded, restart the
3745 // controller
3746 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3747
3748 adapter->quiescent--;
3749
3750 megaraid_mbox_runpendq(adapter, NULL);
3751 }
3752
3753 kioc->done(kioc);
3754
3755 return;
3756 }
3757
3758
3759 /**
3760 * gather_hbainfo - HBA characteristics for the applications
3761 * @param adapter : HBA soft state
3762 * @param hinfo : pointer to the caller's host info strucuture
3763 */
3764 static int
3765 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3766 {
3767 uint8_t dmajor;
3768
3769 dmajor = megaraid_mbox_version[0];
3770
3771 hinfo->pci_vendor_id = adapter->pdev->vendor;
3772 hinfo->pci_device_id = adapter->pdev->device;
3773 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3774 hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3775
3776 hinfo->pci_bus = adapter->pdev->bus->number;
3777 hinfo->pci_dev_fn = adapter->pdev->devfn;
3778 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn);
3779 hinfo->irq = adapter->host->irq;
3780 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport;
3781
3782 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3783 hinfo->host_no = adapter->host->host_no;
3784
3785 return 0;
3786 }
3787
3788 /*
3789 * END: Interface for the common management module
3790 */
3791
3792
3793
3794 /**
3795 * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3796 *
3797 * Allocate packets required to issue FW calls whenever the sysfs attributes
3798 * are read. These attributes would require up-to-date information from the
3799 * FW. Also set up resources for mutual exclusion to share these resources and
3800 * the wait queue.
3801 *
3802 * @param adapter : controller's soft state
3803 *
3804 * @return 0 on success
3805 * @return -ERROR_CODE on failure
3806 */
3807 static int
3808 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3809 {
3810 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3811 int rval = 0;
3812
3813 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3814
3815 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3816
3817 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3818 PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3819
3820 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3821 !raid_dev->sysfs_buffer) {
3822
3823 con_log(CL_ANN, (KERN_WARNING
3824 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3825 __LINE__));
3826
3827 rval = -ENOMEM;
3828
3829 megaraid_sysfs_free_resources(adapter);
3830 }
3831
3832 sema_init(&raid_dev->sysfs_sem, 1);
3833
3834 init_waitqueue_head(&raid_dev->sysfs_wait_q);
3835
3836 return rval;
3837 }
3838
3839
3840 /**
3841 * megaraid_sysfs_free_resources - free sysfs related resources
3842 *
3843 * Free packets allocated for sysfs FW commands
3844 *
3845 * @param adapter : controller's soft state
3846 */
3847 static void
3848 megaraid_sysfs_free_resources(adapter_t *adapter)
3849 {
3850 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3851
3852 kfree(raid_dev->sysfs_uioc);
3853 kfree(raid_dev->sysfs_mbox64);
3854
3855 if (raid_dev->sysfs_buffer) {
3856 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3857 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3858 }
3859 }
3860
3861
3862 /**
3863 * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3864 *
3865 * Callback routine called in the ISR/tasklet context for get ldmap call
3866 *
3867 * @param uioc : completed packet
3868 */
3869 static void
3870 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3871 {
3872 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3873 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3874
3875 uioc->status = 0;
3876
3877 wake_up(&raid_dev->sysfs_wait_q);
3878 }
3879
3880
3881 /**
3882 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3883 *
3884 * Timeout routine to recover and return to application, in case the adapter
3885 * has stopped responding. A timeout of 60 seconds for this command seem like
3886 * a good value
3887 *
3888 * @param uioc : timed out packet
3889 */
3890 static void
3891 megaraid_sysfs_get_ldmap_timeout(unsigned long data)
3892 {
3893 uioc_t *uioc = (uioc_t *)data;
3894 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3895 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3896
3897 uioc->status = -ETIME;
3898
3899 wake_up(&raid_dev->sysfs_wait_q);
3900 }
3901
3902
3903 /**
3904 * megaraid_sysfs_get_ldmap - get update logical drive map
3905 *
3906 * This routine will be called whenever user reads the logical drive
3907 * attributes, go get the current logical drive mapping table from the
3908 * firmware. We use the managment API's to issue commands to the controller.
3909 *
3910 * NOTE: The commands issuance functionality is not generalized and
3911 * implemented in context of "get ld map" command only. If required, the
3912 * command issuance logical can be trivially pulled out and implemented as a
3913 * standalone libary. For now, this should suffice since there is no other
3914 * user of this interface.
3915 *
3916 * @param adapter : controller's soft state
3917 *
3918 * @return 0 on success
3919 * @return -1 on failure
3920 */
3921 static int
3922 megaraid_sysfs_get_ldmap(adapter_t *adapter)
3923 {
3924 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3925 uioc_t *uioc;
3926 mbox64_t *mbox64;
3927 mbox_t *mbox;
3928 char *raw_mbox;
3929 struct timer_list sysfs_timer;
3930 struct timer_list *timerp;
3931 caddr_t ldmap;
3932 int rval = 0;
3933
3934 /*
3935 * Allow only one read at a time to go through the sysfs attributes
3936 */
3937 down(&raid_dev->sysfs_sem);
3938
3939 uioc = raid_dev->sysfs_uioc;
3940 mbox64 = raid_dev->sysfs_mbox64;
3941 ldmap = raid_dev->sysfs_buffer;
3942
3943 memset(uioc, 0, sizeof(uioc_t));
3944 memset(mbox64, 0, sizeof(mbox64_t));
3945 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
3946
3947 mbox = &mbox64->mbox32;
3948 raw_mbox = (char *)mbox;
3949 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64;
3950 uioc->buf_vaddr = (caddr_t)adapter;
3951 uioc->status = -ENODATA;
3952 uioc->done = megaraid_sysfs_get_ldmap_done;
3953
3954 /*
3955 * Prepare the mailbox packet to get the current logical drive mapping
3956 * table
3957 */
3958 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
3959
3960 raw_mbox[0] = FC_DEL_LOGDRV;
3961 raw_mbox[2] = OP_GET_LDID_MAP;
3962
3963 /*
3964 * Setup a timer to recover from a non-responding controller
3965 */
3966 timerp = &sysfs_timer;
3967 init_timer(timerp);
3968
3969 timerp->function = megaraid_sysfs_get_ldmap_timeout;
3970 timerp->data = (unsigned long)uioc;
3971 timerp->expires = jiffies + 60 * HZ;
3972
3973 add_timer(timerp);
3974
3975 /*
3976 * Send the command to the firmware
3977 */
3978 rval = megaraid_mbox_mm_command(adapter, uioc);
3979
3980 if (rval == 0) { // command successfully issued
3981 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
3982
3983 /*
3984 * Check if the command timed out
3985 */
3986 if (uioc->status == -ETIME) {
3987 con_log(CL_ANN, (KERN_NOTICE
3988 "megaraid: sysfs get ld map timed out\n"));
3989
3990 rval = -ETIME;
3991 }
3992 else {
3993 rval = mbox->status;
3994 }
3995
3996 if (rval == 0) {
3997 memcpy(raid_dev->curr_ldmap, ldmap,
3998 sizeof(raid_dev->curr_ldmap));
3999 }
4000 else {
4001 con_log(CL_ANN, (KERN_NOTICE
4002 "megaraid: get ld map failed with %x\n", rval));
4003 }
4004 }
4005 else {
4006 con_log(CL_ANN, (KERN_NOTICE
4007 "megaraid: could not issue ldmap command:%x\n", rval));
4008 }
4009
4010
4011 del_timer_sync(timerp);
4012
4013 up(&raid_dev->sysfs_sem);
4014
4015 return rval;
4016 }
4017
4018
4019 /**
4020 * megaraid_sysfs_show_app_hndl - display application handle for this adapter
4021 *
4022 * Display the handle used by the applications while executing management
4023 * tasks on the adapter. We invoke a management module API to get the adapter
4024 * handle, since we do not interface with applications directly.
4025 *
4026 * @param cdev : class device object representation for the host
4027 * @param buf : buffer to send data to
4028 */
4029 static ssize_t
4030 megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf)
4031 {
4032 struct Scsi_Host *shost = class_to_shost(cdev);
4033 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4034 uint32_t app_hndl;
4035
4036 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4037
4038 return snprintf(buf, 8, "%u\n", app_hndl);
4039 }
4040
4041
4042 /**
4043 * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4044 *
4045 * Display the logical drive number for the device in question, if it a valid
4046 * logical drive. For physical devices, "-1" is returned
4047 * The logical drive number is displayed in following format
4048 *
4049 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4050 * <int> <int> <int> <int>
4051 *
4052 * @param dev : device object representation for the scsi device
4053 * @param buf : buffer to send data to
4054 */
4055 static ssize_t
4056 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
4057 {
4058 struct scsi_device *sdev = to_scsi_device(dev);
4059 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4060 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4061 int scsi_id = -1;
4062 int logical_drv = -1;
4063 int ldid_map = -1;
4064 uint32_t app_hndl = 0;
4065 int mapped_sdev_id;
4066 int rval;
4067 int i;
4068
4069 if (raid_dev->random_del_supported &&
4070 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4071
4072 rval = megaraid_sysfs_get_ldmap(adapter);
4073 if (rval == 0) {
4074
4075 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4076
4077 mapped_sdev_id = sdev->id;
4078
4079 if (sdev->id > adapter->init_id) {
4080 mapped_sdev_id -= 1;
4081 }
4082
4083 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4084
4085 scsi_id = sdev->id;
4086
4087 logical_drv = i;
4088
4089 ldid_map = raid_dev->curr_ldmap[i];
4090
4091 app_hndl = mraid_mm_adapter_app_handle(
4092 adapter->unique_id);
4093
4094 break;
4095 }
4096 }
4097 }
4098 else {
4099 con_log(CL_ANN, (KERN_NOTICE
4100 "megaraid: sysfs get ld map failed: %x\n",
4101 rval));
4102 }
4103 }
4104
4105 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4106 ldid_map, app_hndl);
4107 }
4108
4109
4110 /*
4111 * END: Mailbox Low Level Driver
4112 */
4113 module_init(megaraid_init);
4114 module_exit(megaraid_exit);
4115
4116 /* vim: set ts=8 sw=8 tw=78 ai si: */
Linux with added FPC-III support