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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / megaraid / megaraid_mbox.c
1 /*
2 *
3 * Linux MegaRAID device driver
4 *
5 * Copyright (c) 2003-2004 LSI Logic Corporation.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 *
12 * FILE : megaraid_mbox.c
13 * Version : v2.20.5.1 (Nov 16 2006)
14 *
15 * Authors:
16 * Atul Mukker <Atul.Mukker@lsi.com>
17 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com>
18 * Manoj Jose <Manoj.Jose@lsi.com>
19 * Seokmann Ju
20 *
21 * List of supported controllers
22 *
23 * OEM Product Name VID DID SSVID SSID
24 * --- ------------ --- --- ---- ----
25 * Dell PERC3/QC 101E 1960 1028 0471
26 * Dell PERC3/DC 101E 1960 1028 0493
27 * Dell PERC3/SC 101E 1960 1028 0475
28 * Dell PERC3/Di 1028 1960 1028 0123
29 * Dell PERC4/SC 1000 1960 1028 0520
30 * Dell PERC4/DC 1000 1960 1028 0518
31 * Dell PERC4/QC 1000 0407 1028 0531
32 * Dell PERC4/Di 1028 000F 1028 014A
33 * Dell PERC 4e/Si 1028 0013 1028 016c
34 * Dell PERC 4e/Di 1028 0013 1028 016d
35 * Dell PERC 4e/Di 1028 0013 1028 016e
36 * Dell PERC 4e/Di 1028 0013 1028 016f
37 * Dell PERC 4e/Di 1028 0013 1028 0170
38 * Dell PERC 4e/DC 1000 0408 1028 0002
39 * Dell PERC 4e/SC 1000 0408 1028 0001
40 *
41 *
42 * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520
43 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520
44 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518
45 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530
46 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532
47 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531
48 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001
49 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002
50 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523
51 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523
52 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004
53 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008
54 *
55 * INTEL RAID Controller SRCU42X 1000 0407 8086 0532
56 * INTEL RAID Controller SRCS16 1000 1960 8086 0523
57 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002
58 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530
59 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008
60 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431
61 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499
62 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520
63 *
64 * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065
65 *
66 * ACER MegaRAID ROMB-2E 1000 0408 1025 004D
67 *
68 * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287
69 *
70 * For history of changes, see Documentation/ChangeLog.megaraid
71 */
72
73 #include <linux/slab.h>
74 #include "megaraid_mbox.h"
75
76 static int megaraid_init(void);
77 static void megaraid_exit(void);
78
79 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
80 static void megaraid_detach_one(struct pci_dev *);
81 static void megaraid_mbox_shutdown(struct pci_dev *);
82
83 static int megaraid_io_attach(adapter_t *);
84 static void megaraid_io_detach(adapter_t *);
85
86 static int megaraid_init_mbox(adapter_t *);
87 static void megaraid_fini_mbox(adapter_t *);
88
89 static int megaraid_alloc_cmd_packets(adapter_t *);
90 static void megaraid_free_cmd_packets(adapter_t *);
91
92 static int megaraid_mbox_setup_dma_pools(adapter_t *);
93 static void megaraid_mbox_teardown_dma_pools(adapter_t *);
94
95 static int megaraid_sysfs_alloc_resources(adapter_t *);
96 static void megaraid_sysfs_free_resources(adapter_t *);
97
98 static int megaraid_abort_handler(struct scsi_cmnd *);
99 static int megaraid_reset_handler(struct scsi_cmnd *);
100
101 static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
102 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
103 static int megaraid_busywait_mbox(mraid_device_t *);
104 static int megaraid_mbox_product_info(adapter_t *);
105 static int megaraid_mbox_extended_cdb(adapter_t *);
106 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
107 static int megaraid_mbox_support_random_del(adapter_t *);
108 static int megaraid_mbox_get_max_sg(adapter_t *);
109 static void megaraid_mbox_enum_raid_scsi(adapter_t *);
110 static void megaraid_mbox_flush_cache(adapter_t *);
111 static int megaraid_mbox_fire_sync_cmd(adapter_t *);
112
113 static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
114 static void megaraid_mbox_setup_device_map(adapter_t *);
115
116 static int megaraid_queue_command(struct scsi_cmnd *,
117 void (*)(struct scsi_cmnd *));
118 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
119 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
120 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
121 struct scsi_cmnd *);
122 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
123 struct scsi_cmnd *);
124
125 static irqreturn_t megaraid_isr(int, void *);
126
127 static void megaraid_mbox_dpc(unsigned long);
128
129 static ssize_t megaraid_sysfs_show_app_hndl(struct device *, struct device_attribute *attr, char *);
130 static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *);
131
132 static int megaraid_cmm_register(adapter_t *);
133 static int megaraid_cmm_unregister(adapter_t *);
134 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
135 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
136 static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
137 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
138 static int wait_till_fw_empty(adapter_t *);
139
140
141
142 MODULE_AUTHOR("megaraidlinux@lsi.com");
143 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
144 MODULE_LICENSE("GPL");
145 MODULE_VERSION(MEGARAID_VERSION);
146
147 /*
148 * ### modules parameters for driver ###
149 */
150
151 /*
152 * Set to enable driver to expose unconfigured disk to kernel
153 */
154 static int megaraid_expose_unconf_disks = 0;
155 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
156 MODULE_PARM_DESC(unconf_disks,
157 "Set to expose unconfigured disks to kernel (default=0)");
158
159 /*
160 * driver wait time if the adapter's mailbox is busy
161 */
162 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
163 module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
164 MODULE_PARM_DESC(busy_wait,
165 "Max wait for mailbox in microseconds if busy (default=10)");
166
167 /*
168 * number of sectors per IO command
169 */
170 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
171 module_param_named(max_sectors, megaraid_max_sectors, int, 0);
172 MODULE_PARM_DESC(max_sectors,
173 "Maximum number of sectors per IO command (default=128)");
174
175 /*
176 * number of commands per logical unit
177 */
178 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
179 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
180 MODULE_PARM_DESC(cmd_per_lun,
181 "Maximum number of commands per logical unit (default=64)");
182
183
184 /*
185 * Fast driver load option, skip scanning for physical devices during load.
186 * This would result in non-disk devices being skipped during driver load
187 * time. These can be later added though, using /proc/scsi/scsi
188 */
189 static unsigned int megaraid_fast_load = 0;
190 module_param_named(fast_load, megaraid_fast_load, int, 0);
191 MODULE_PARM_DESC(fast_load,
192 "Faster loading of the driver, skips physical devices! (default=0)");
193
194
195 /*
196 * mraid_debug level - threshold for amount of information to be displayed by
197 * the driver. This level can be changed through modules parameters, ioctl or
198 * sysfs/proc interface. By default, print the announcement messages only.
199 */
200 int mraid_debug_level = CL_ANN;
201 module_param_named(debug_level, mraid_debug_level, int, 0);
202 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
203
204 /*
205 * ### global data ###
206 */
207 static uint8_t megaraid_mbox_version[8] =
208 { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 };
209
210
211 /*
212 * PCI table for all supported controllers.
213 */
214 static struct pci_device_id pci_id_table_g[] = {
215 {
216 PCI_VENDOR_ID_DELL,
217 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
218 PCI_VENDOR_ID_DELL,
219 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
220 },
221 {
222 PCI_VENDOR_ID_LSI_LOGIC,
223 PCI_DEVICE_ID_PERC4_SC,
224 PCI_VENDOR_ID_DELL,
225 PCI_SUBSYS_ID_PERC4_SC,
226 },
227 {
228 PCI_VENDOR_ID_LSI_LOGIC,
229 PCI_DEVICE_ID_PERC4_DC,
230 PCI_VENDOR_ID_DELL,
231 PCI_SUBSYS_ID_PERC4_DC,
232 },
233 {
234 PCI_VENDOR_ID_LSI_LOGIC,
235 PCI_DEVICE_ID_VERDE,
236 PCI_ANY_ID,
237 PCI_ANY_ID,
238 },
239 {
240 PCI_VENDOR_ID_DELL,
241 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
242 PCI_VENDOR_ID_DELL,
243 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
244 },
245 {
246 PCI_VENDOR_ID_DELL,
247 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
248 PCI_VENDOR_ID_DELL,
249 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
250 },
251 {
252 PCI_VENDOR_ID_DELL,
253 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
254 PCI_VENDOR_ID_DELL,
255 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
256 },
257 {
258 PCI_VENDOR_ID_DELL,
259 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
260 PCI_VENDOR_ID_DELL,
261 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
262 },
263 {
264 PCI_VENDOR_ID_DELL,
265 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
266 PCI_VENDOR_ID_DELL,
267 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
268 },
269 {
270 PCI_VENDOR_ID_DELL,
271 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
272 PCI_VENDOR_ID_DELL,
273 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
274 },
275 {
276 PCI_VENDOR_ID_LSI_LOGIC,
277 PCI_DEVICE_ID_DOBSON,
278 PCI_ANY_ID,
279 PCI_ANY_ID,
280 },
281 {
282 PCI_VENDOR_ID_AMI,
283 PCI_DEVICE_ID_AMI_MEGARAID3,
284 PCI_ANY_ID,
285 PCI_ANY_ID,
286 },
287 {
288 PCI_VENDOR_ID_LSI_LOGIC,
289 PCI_DEVICE_ID_AMI_MEGARAID3,
290 PCI_ANY_ID,
291 PCI_ANY_ID,
292 },
293 {
294 PCI_VENDOR_ID_LSI_LOGIC,
295 PCI_DEVICE_ID_LINDSAY,
296 PCI_ANY_ID,
297 PCI_ANY_ID,
298 },
299 {0} /* Terminating entry */
300 };
301 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
302
303
304 static struct pci_driver megaraid_pci_driver = {
305 .name = "megaraid",
306 .id_table = pci_id_table_g,
307 .probe = megaraid_probe_one,
308 .remove = __devexit_p(megaraid_detach_one),
309 .shutdown = megaraid_mbox_shutdown,
310 };
311
312
313
314 // definitions for the device attributes for exporting logical drive number
315 // for a scsi address (Host, Channel, Id, Lun)
316
317 DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
318 NULL);
319
320 // Host template initializer for megaraid mbox sysfs device attributes
321 static struct device_attribute *megaraid_shost_attrs[] = {
322 &dev_attr_megaraid_mbox_app_hndl,
323 NULL,
324 };
325
326
327 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
328
329 // Host template initializer for megaraid mbox sysfs device attributes
330 static struct device_attribute *megaraid_sdev_attrs[] = {
331 &dev_attr_megaraid_mbox_ld,
332 NULL,
333 };
334
335 /**
336 * megaraid_change_queue_depth - Change the device's queue depth
337 * @sdev: scsi device struct
338 * @qdepth: depth to set
339 * @reason: calling context
340 *
341 * Return value:
342 * actual depth set
343 */
344 static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth,
345 int reason)
346 {
347 if (reason != SCSI_QDEPTH_DEFAULT)
348 return -EOPNOTSUPP;
349
350 if (qdepth > MBOX_MAX_SCSI_CMDS)
351 qdepth = MBOX_MAX_SCSI_CMDS;
352 scsi_adjust_queue_depth(sdev, 0, qdepth);
353 return sdev->queue_depth;
354 }
355
356 /*
357 * Scsi host template for megaraid unified driver
358 */
359 static struct scsi_host_template megaraid_template_g = {
360 .module = THIS_MODULE,
361 .name = "LSI Logic MegaRAID driver",
362 .proc_name = "megaraid",
363 .queuecommand = megaraid_queue_command,
364 .eh_abort_handler = megaraid_abort_handler,
365 .eh_device_reset_handler = megaraid_reset_handler,
366 .eh_bus_reset_handler = megaraid_reset_handler,
367 .eh_host_reset_handler = megaraid_reset_handler,
368 .change_queue_depth = megaraid_change_queue_depth,
369 .use_clustering = ENABLE_CLUSTERING,
370 .sdev_attrs = megaraid_sdev_attrs,
371 .shost_attrs = megaraid_shost_attrs,
372 };
373
374
375 /**
376 * megaraid_init - module load hook
377 *
378 * We register ourselves as hotplug enabled module and let PCI subsystem
379 * discover our adapters.
380 */
381 static int __init
382 megaraid_init(void)
383 {
384 int rval;
385
386 // Announce the driver version
387 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
388 MEGARAID_EXT_VERSION));
389
390 // check validity of module parameters
391 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
392
393 con_log(CL_ANN, (KERN_WARNING
394 "megaraid mailbox: max commands per lun reset to %d\n",
395 MBOX_MAX_SCSI_CMDS));
396
397 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
398 }
399
400
401 // register as a PCI hot-plug driver module
402 rval = pci_register_driver(&megaraid_pci_driver);
403 if (rval < 0) {
404 con_log(CL_ANN, (KERN_WARNING
405 "megaraid: could not register hotplug support.\n"));
406 }
407
408 return rval;
409 }
410
411
412 /**
413 * megaraid_exit - driver unload entry point
414 *
415 * We simply unwrap the megaraid_init routine here.
416 */
417 static void __exit
418 megaraid_exit(void)
419 {
420 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
421
422 // unregister as PCI hotplug driver
423 pci_unregister_driver(&megaraid_pci_driver);
424
425 return;
426 }
427
428
429 /**
430 * megaraid_probe_one - PCI hotplug entry point
431 * @pdev : handle to this controller's PCI configuration space
432 * @id : pci device id of the class of controllers
433 *
434 * This routine should be called whenever a new adapter is detected by the
435 * PCI hotplug susbsystem.
436 */
437 static int __devinit
438 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
439 {
440 adapter_t *adapter;
441
442
443 // detected a new controller
444 con_log(CL_ANN, (KERN_INFO
445 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
446 pdev->vendor, pdev->device, pdev->subsystem_vendor,
447 pdev->subsystem_device));
448
449 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
450 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
451
452 if (pci_enable_device(pdev)) {
453 con_log(CL_ANN, (KERN_WARNING
454 "megaraid: pci_enable_device failed\n"));
455
456 return -ENODEV;
457 }
458
459 // Enable bus-mastering on this controller
460 pci_set_master(pdev);
461
462 // Allocate the per driver initialization structure
463 adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL);
464
465 if (adapter == NULL) {
466 con_log(CL_ANN, (KERN_WARNING
467 "megaraid: out of memory, %s %d.\n", __func__, __LINE__));
468
469 goto out_probe_one;
470 }
471
472
473 // set up PCI related soft state and other pre-known parameters
474 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn;
475 adapter->irq = pdev->irq;
476 adapter->pdev = pdev;
477
478 atomic_set(&adapter->being_detached, 0);
479
480 // Setup the default DMA mask. This would be changed later on
481 // depending on hardware capabilities
482 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(32)) != 0) {
483
484 con_log(CL_ANN, (KERN_WARNING
485 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
486
487 goto out_free_adapter;
488 }
489
490
491 // Initialize the synchronization lock for kernel and LLD
492 spin_lock_init(&adapter->lock);
493
494 // Initialize the command queues: the list of free SCBs and the list
495 // of pending SCBs.
496 INIT_LIST_HEAD(&adapter->kscb_pool);
497 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
498
499 INIT_LIST_HEAD(&adapter->pend_list);
500 spin_lock_init(PENDING_LIST_LOCK(adapter));
501
502 INIT_LIST_HEAD(&adapter->completed_list);
503 spin_lock_init(COMPLETED_LIST_LOCK(adapter));
504
505
506 // Start the mailbox based controller
507 if (megaraid_init_mbox(adapter) != 0) {
508 con_log(CL_ANN, (KERN_WARNING
509 "megaraid: maibox adapter did not initialize\n"));
510
511 goto out_free_adapter;
512 }
513
514 // Register with LSI Common Management Module
515 if (megaraid_cmm_register(adapter) != 0) {
516
517 con_log(CL_ANN, (KERN_WARNING
518 "megaraid: could not register with management module\n"));
519
520 goto out_fini_mbox;
521 }
522
523 // setup adapter handle in PCI soft state
524 pci_set_drvdata(pdev, adapter);
525
526 // attach with scsi mid-layer
527 if (megaraid_io_attach(adapter) != 0) {
528
529 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
530
531 goto out_cmm_unreg;
532 }
533
534 return 0;
535
536 out_cmm_unreg:
537 pci_set_drvdata(pdev, NULL);
538 megaraid_cmm_unregister(adapter);
539 out_fini_mbox:
540 megaraid_fini_mbox(adapter);
541 out_free_adapter:
542 kfree(adapter);
543 out_probe_one:
544 pci_disable_device(pdev);
545
546 return -ENODEV;
547 }
548
549
550 /**
551 * megaraid_detach_one - release framework resources and call LLD release routine
552 * @pdev : handle for our PCI cofiguration space
553 *
554 * This routine is called during driver unload. We free all the allocated
555 * resources and call the corresponding LLD so that it can also release all
556 * its resources.
557 *
558 * This routine is also called from the PCI hotplug system.
559 */
560 static void
561 megaraid_detach_one(struct pci_dev *pdev)
562 {
563 adapter_t *adapter;
564 struct Scsi_Host *host;
565
566
567 // Start a rollback on this adapter
568 adapter = pci_get_drvdata(pdev);
569
570 if (!adapter) {
571 con_log(CL_ANN, (KERN_CRIT
572 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
573 pdev->vendor, pdev->device, pdev->subsystem_vendor,
574 pdev->subsystem_device));
575
576 return;
577 }
578 else {
579 con_log(CL_ANN, (KERN_NOTICE
580 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
581 pdev->vendor, pdev->device, pdev->subsystem_vendor,
582 pdev->subsystem_device));
583 }
584
585
586 host = adapter->host;
587
588 // do not allow any more requests from the management module for this
589 // adapter.
590 // FIXME: How do we account for the request which might still be
591 // pending with us?
592 atomic_set(&adapter->being_detached, 1);
593
594 // detach from the IO sub-system
595 megaraid_io_detach(adapter);
596
597 // reset the device state in the PCI structure. We check this
598 // condition when we enter here. If the device state is NULL,
599 // that would mean the device has already been removed
600 pci_set_drvdata(pdev, NULL);
601
602 // Unregister from common management module
603 //
604 // FIXME: this must return success or failure for conditions if there
605 // is a command pending with LLD or not.
606 megaraid_cmm_unregister(adapter);
607
608 // finalize the mailbox based controller and release all resources
609 megaraid_fini_mbox(adapter);
610
611 kfree(adapter);
612
613 scsi_host_put(host);
614
615 pci_disable_device(pdev);
616
617 return;
618 }
619
620
621 /**
622 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
623 * @pdev : generic driver model device
624 *
625 * Shutdown notification, perform flush cache.
626 */
627 static void
628 megaraid_mbox_shutdown(struct pci_dev *pdev)
629 {
630 adapter_t *adapter = pci_get_drvdata(pdev);
631 static int counter;
632
633 if (!adapter) {
634 con_log(CL_ANN, (KERN_WARNING
635 "megaraid: null device in shutdown\n"));
636 return;
637 }
638
639 // flush caches now
640 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
641 counter++));
642
643 megaraid_mbox_flush_cache(adapter);
644
645 con_log(CL_ANN, ("done\n"));
646 }
647
648
649 /**
650 * megaraid_io_attach - attach a device with the IO subsystem
651 * @adapter : controller's soft state
652 *
653 * Attach this device with the IO subsystem.
654 */
655 static int
656 megaraid_io_attach(adapter_t *adapter)
657 {
658 struct Scsi_Host *host;
659
660 // Initialize SCSI Host structure
661 host = scsi_host_alloc(&megaraid_template_g, 8);
662 if (!host) {
663 con_log(CL_ANN, (KERN_WARNING
664 "megaraid mbox: scsi_register failed\n"));
665
666 return -1;
667 }
668
669 SCSIHOST2ADAP(host) = (caddr_t)adapter;
670 adapter->host = host;
671
672 host->irq = adapter->irq;
673 host->unique_id = adapter->unique_id;
674 host->can_queue = adapter->max_cmds;
675 host->this_id = adapter->init_id;
676 host->sg_tablesize = adapter->sglen;
677 host->max_sectors = adapter->max_sectors;
678 host->cmd_per_lun = adapter->cmd_per_lun;
679 host->max_channel = adapter->max_channel;
680 host->max_id = adapter->max_target;
681 host->max_lun = adapter->max_lun;
682
683
684 // notify mid-layer about the new controller
685 if (scsi_add_host(host, &adapter->pdev->dev)) {
686
687 con_log(CL_ANN, (KERN_WARNING
688 "megaraid mbox: scsi_add_host failed\n"));
689
690 scsi_host_put(host);
691
692 return -1;
693 }
694
695 scsi_scan_host(host);
696
697 return 0;
698 }
699
700
701 /**
702 * megaraid_io_detach - detach a device from the IO subsystem
703 * @adapter : controller's soft state
704 *
705 * Detach this device from the IO subsystem.
706 */
707 static void
708 megaraid_io_detach(adapter_t *adapter)
709 {
710 struct Scsi_Host *host;
711
712 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
713
714 host = adapter->host;
715
716 scsi_remove_host(host);
717
718 return;
719 }
720
721
722 /*
723 * START: Mailbox Low Level Driver
724 *
725 * This is section specific to the single mailbox based controllers
726 */
727
728 /**
729 * megaraid_init_mbox - initialize controller
730 * @adapter : our soft state
731 *
732 * - Allocate 16-byte aligned mailbox memory for firmware handshake
733 * - Allocate controller's memory resources
734 * - Find out all initialization data
735 * - Allocate memory required for all the commands
736 * - Use internal library of FW routines, build up complete soft state
737 */
738 static int __devinit
739 megaraid_init_mbox(adapter_t *adapter)
740 {
741 struct pci_dev *pdev;
742 mraid_device_t *raid_dev;
743 int i;
744 uint32_t magic64;
745
746
747 adapter->ito = MBOX_TIMEOUT;
748 pdev = adapter->pdev;
749
750 /*
751 * Allocate and initialize the init data structure for mailbox
752 * controllers
753 */
754 raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL);
755 if (raid_dev == NULL) return -1;
756
757
758 /*
759 * Attach the adapter soft state to raid device soft state
760 */
761 adapter->raid_device = (caddr_t)raid_dev;
762 raid_dev->fast_load = megaraid_fast_load;
763
764
765 // our baseport
766 raid_dev->baseport = pci_resource_start(pdev, 0);
767
768 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
769
770 con_log(CL_ANN, (KERN_WARNING
771 "megaraid: mem region busy\n"));
772
773 goto out_free_raid_dev;
774 }
775
776 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
777
778 if (!raid_dev->baseaddr) {
779
780 con_log(CL_ANN, (KERN_WARNING
781 "megaraid: could not map hba memory\n") );
782
783 goto out_release_regions;
784 }
785
786 /* initialize the mutual exclusion lock for the mailbox */
787 spin_lock_init(&raid_dev->mailbox_lock);
788
789 /* allocate memory required for commands */
790 if (megaraid_alloc_cmd_packets(adapter) != 0)
791 goto out_iounmap;
792
793 /*
794 * Issue SYNC cmd to flush the pending cmds in the adapter
795 * and initialize its internal state
796 */
797
798 if (megaraid_mbox_fire_sync_cmd(adapter))
799 con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
800
801 /*
802 * Setup the rest of the soft state using the library of
803 * FW routines
804 */
805
806 /* request IRQ and register the interrupt service routine */
807 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
808 adapter)) {
809
810 con_log(CL_ANN, (KERN_WARNING
811 "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
812 goto out_alloc_cmds;
813
814 }
815
816 // Product info
817 if (megaraid_mbox_product_info(adapter) != 0)
818 goto out_free_irq;
819
820 // Do we support extended CDBs
821 adapter->max_cdb_sz = 10;
822 if (megaraid_mbox_extended_cdb(adapter) == 0) {
823 adapter->max_cdb_sz = 16;
824 }
825
826 /*
827 * Do we support cluster environment, if we do, what is the initiator
828 * id.
829 * NOTE: In a non-cluster aware firmware environment, the LLD should
830 * return 7 as initiator id.
831 */
832 adapter->ha = 0;
833 adapter->init_id = -1;
834 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
835 adapter->ha = 1;
836 }
837
838 /*
839 * Prepare the device ids array to have the mapping between the kernel
840 * device address and megaraid device address.
841 * We export the physical devices on their actual addresses. The
842 * logical drives are exported on a virtual SCSI channel
843 */
844 megaraid_mbox_setup_device_map(adapter);
845
846 // If the firmware supports random deletion, update the device id map
847 if (megaraid_mbox_support_random_del(adapter)) {
848
849 // Change the logical drives numbers in device_ids array one
850 // slot in device_ids is reserved for target id, that's why
851 // "<=" below
852 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
853 adapter->device_ids[adapter->max_channel][i] += 0x80;
854 }
855 adapter->device_ids[adapter->max_channel][adapter->init_id] =
856 0xFF;
857
858 raid_dev->random_del_supported = 1;
859 }
860
861 /*
862 * find out the maximum number of scatter-gather elements supported by
863 * this firmware
864 */
865 adapter->sglen = megaraid_mbox_get_max_sg(adapter);
866
867 // enumerate RAID and SCSI channels so that all devices on SCSI
868 // channels can later be exported, including disk devices
869 megaraid_mbox_enum_raid_scsi(adapter);
870
871 /*
872 * Other parameters required by upper layer
873 *
874 * maximum number of sectors per IO command
875 */
876 adapter->max_sectors = megaraid_max_sectors;
877
878 /*
879 * number of queued commands per LUN.
880 */
881 adapter->cmd_per_lun = megaraid_cmd_per_lun;
882
883 /*
884 * Allocate resources required to issue FW calls, when sysfs is
885 * accessed
886 */
887 if (megaraid_sysfs_alloc_resources(adapter) != 0)
888 goto out_free_irq;
889
890 // Set the DMA mask to 64-bit. All supported controllers as capable of
891 // DMA in this range
892 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
893
894 if (((magic64 == HBA_SIGNATURE_64_BIT) &&
895 ((adapter->pdev->subsystem_device !=
896 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
897 (adapter->pdev->subsystem_device !=
898 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
899 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
900 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
901 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
902 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
903 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
904 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
905 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
906 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
907 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
908 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
909 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(64))) {
910 con_log(CL_ANN, (KERN_WARNING
911 "megaraid: DMA mask for 64-bit failed\n"));
912
913 if (pci_set_dma_mask (adapter->pdev, DMA_BIT_MASK(32))) {
914 con_log(CL_ANN, (KERN_WARNING
915 "megaraid: 32-bit DMA mask failed\n"));
916 goto out_free_sysfs_res;
917 }
918 }
919 }
920
921 // setup tasklet for DPC
922 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
923 (unsigned long)adapter);
924
925 con_log(CL_DLEVEL1, (KERN_INFO
926 "megaraid mbox hba successfully initialized\n"));
927
928 return 0;
929
930 out_free_sysfs_res:
931 megaraid_sysfs_free_resources(adapter);
932 out_free_irq:
933 free_irq(adapter->irq, adapter);
934 out_alloc_cmds:
935 megaraid_free_cmd_packets(adapter);
936 out_iounmap:
937 iounmap(raid_dev->baseaddr);
938 out_release_regions:
939 pci_release_regions(pdev);
940 out_free_raid_dev:
941 kfree(raid_dev);
942
943 return -1;
944 }
945
946
947 /**
948 * megaraid_fini_mbox - undo controller initialization
949 * @adapter : our soft state
950 */
951 static void
952 megaraid_fini_mbox(adapter_t *adapter)
953 {
954 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
955
956 // flush all caches
957 megaraid_mbox_flush_cache(adapter);
958
959 tasklet_kill(&adapter->dpc_h);
960
961 megaraid_sysfs_free_resources(adapter);
962
963 megaraid_free_cmd_packets(adapter);
964
965 free_irq(adapter->irq, adapter);
966
967 iounmap(raid_dev->baseaddr);
968
969 pci_release_regions(adapter->pdev);
970
971 kfree(raid_dev);
972
973 return;
974 }
975
976
977 /**
978 * megaraid_alloc_cmd_packets - allocate shared mailbox
979 * @adapter : soft state of the raid controller
980 *
981 * Allocate and align the shared mailbox. This maibox is used to issue
982 * all the commands. For IO based controllers, the mailbox is also regsitered
983 * with the FW. Allocate memory for all commands as well.
984 * This is our big allocator.
985 */
986 static int
987 megaraid_alloc_cmd_packets(adapter_t *adapter)
988 {
989 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
990 struct pci_dev *pdev;
991 unsigned long align;
992 scb_t *scb;
993 mbox_ccb_t *ccb;
994 struct mraid_pci_blk *epthru_pci_blk;
995 struct mraid_pci_blk *sg_pci_blk;
996 struct mraid_pci_blk *mbox_pci_blk;
997 int i;
998
999 pdev = adapter->pdev;
1000
1001 /*
1002 * Setup the mailbox
1003 * Allocate the common 16-byte aligned memory for the handshake
1004 * mailbox.
1005 */
1006 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
1007 sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
1008
1009 if (!raid_dev->una_mbox64) {
1010 con_log(CL_ANN, (KERN_WARNING
1011 "megaraid: out of memory, %s %d\n", __func__,
1012 __LINE__));
1013 return -1;
1014 }
1015 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
1016
1017 /*
1018 * Align the mailbox at 16-byte boundary
1019 */
1020 raid_dev->mbox = &raid_dev->una_mbox64->mbox32;
1021
1022 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
1023 (~0UL ^ 0xFUL));
1024
1025 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
1026
1027 align = ((void *)raid_dev->mbox -
1028 ((void *)&raid_dev->una_mbox64->mbox32));
1029
1030 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1031 align;
1032
1033 // Allocate memory for commands issued internally
1034 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
1035 &adapter->ibuf_dma_h);
1036 if (!adapter->ibuf) {
1037
1038 con_log(CL_ANN, (KERN_WARNING
1039 "megaraid: out of memory, %s %d\n", __func__,
1040 __LINE__));
1041
1042 goto out_free_common_mbox;
1043 }
1044 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
1045
1046 // Allocate memory for our SCSI Command Blocks and their associated
1047 // memory
1048
1049 /*
1050 * Allocate memory for the base list of scb. Later allocate memory for
1051 * CCBs and embedded components of each CCB and point the pointers in
1052 * scb to the allocated components
1053 * NOTE: The code to allocate SCB will be duplicated in all the LLD
1054 * since the calling routine does not yet know the number of available
1055 * commands.
1056 */
1057 adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL);
1058
1059 if (adapter->kscb_list == NULL) {
1060 con_log(CL_ANN, (KERN_WARNING
1061 "megaraid: out of memory, %s %d\n", __func__,
1062 __LINE__));
1063 goto out_free_ibuf;
1064 }
1065
1066 // memory allocation for our command packets
1067 if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1068 con_log(CL_ANN, (KERN_WARNING
1069 "megaraid: out of memory, %s %d\n", __func__,
1070 __LINE__));
1071 goto out_free_scb_list;
1072 }
1073
1074 // Adjust the scb pointers and link in the free pool
1075 epthru_pci_blk = raid_dev->epthru_pool;
1076 sg_pci_blk = raid_dev->sg_pool;
1077 mbox_pci_blk = raid_dev->mbox_pool;
1078
1079 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1080 scb = adapter->kscb_list + i;
1081 ccb = raid_dev->ccb_list + i;
1082
1083 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1084 ccb->raw_mbox = (uint8_t *)ccb->mbox;
1085 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1086 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1087
1088 // make sure the mailbox is aligned properly
1089 if (ccb->mbox_dma_h & 0x0F) {
1090 con_log(CL_ANN, (KERN_CRIT
1091 "megaraid mbox: not aligned on 16-bytes\n"));
1092
1093 goto out_teardown_dma_pools;
1094 }
1095
1096 ccb->epthru = (mraid_epassthru_t *)
1097 epthru_pci_blk[i].vaddr;
1098 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr;
1099 ccb->pthru = (mraid_passthru_t *)ccb->epthru;
1100 ccb->pthru_dma_h = ccb->epthru_dma_h;
1101
1102
1103 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1104 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr;
1105 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64;
1106
1107 scb->ccb = (caddr_t)ccb;
1108 scb->gp = 0;
1109
1110 scb->sno = i; // command index
1111
1112 scb->scp = NULL;
1113 scb->state = SCB_FREE;
1114 scb->dma_direction = PCI_DMA_NONE;
1115 scb->dma_type = MRAID_DMA_NONE;
1116 scb->dev_channel = -1;
1117 scb->dev_target = -1;
1118
1119 // put scb in the free pool
1120 list_add_tail(&scb->list, &adapter->kscb_pool);
1121 }
1122
1123 return 0;
1124
1125 out_teardown_dma_pools:
1126 megaraid_mbox_teardown_dma_pools(adapter);
1127 out_free_scb_list:
1128 kfree(adapter->kscb_list);
1129 out_free_ibuf:
1130 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1131 adapter->ibuf_dma_h);
1132 out_free_common_mbox:
1133 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1134 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1135
1136 return -1;
1137 }
1138
1139
1140 /**
1141 * megaraid_free_cmd_packets - free memory
1142 * @adapter : soft state of the raid controller
1143 *
1144 * Release memory resources allocated for commands.
1145 */
1146 static void
1147 megaraid_free_cmd_packets(adapter_t *adapter)
1148 {
1149 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1150
1151 megaraid_mbox_teardown_dma_pools(adapter);
1152
1153 kfree(adapter->kscb_list);
1154
1155 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1156 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1157
1158 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1159 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1160 return;
1161 }
1162
1163
1164 /**
1165 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1166 * @adapter : HBA soft state
1167 *
1168 * Setup the dma pools for mailbox, passthru and extended passthru structures,
1169 * and scatter-gather lists.
1170 */
1171 static int
1172 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1173 {
1174 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1175 struct mraid_pci_blk *epthru_pci_blk;
1176 struct mraid_pci_blk *sg_pci_blk;
1177 struct mraid_pci_blk *mbox_pci_blk;
1178 int i;
1179
1180
1181
1182 // Allocate memory for 16-bytes aligned mailboxes
1183 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1184 adapter->pdev,
1185 sizeof(mbox64_t) + 16,
1186 16, 0);
1187
1188 if (raid_dev->mbox_pool_handle == NULL) {
1189 goto fail_setup_dma_pool;
1190 }
1191
1192 mbox_pci_blk = raid_dev->mbox_pool;
1193 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1194 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1195 raid_dev->mbox_pool_handle,
1196 GFP_KERNEL,
1197 &mbox_pci_blk[i].dma_addr);
1198 if (!mbox_pci_blk[i].vaddr) {
1199 goto fail_setup_dma_pool;
1200 }
1201 }
1202
1203 /*
1204 * Allocate memory for each embedded passthru strucuture pointer
1205 * Request for a 128 bytes aligned structure for each passthru command
1206 * structure
1207 * Since passthru and extended passthru commands are exclusive, they
1208 * share common memory pool. Passthru structures piggyback on memory
1209 * allocted to extended passthru since passthru is smaller of the two
1210 */
1211 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1212 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1213
1214 if (raid_dev->epthru_pool_handle == NULL) {
1215 goto fail_setup_dma_pool;
1216 }
1217
1218 epthru_pci_blk = raid_dev->epthru_pool;
1219 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1220 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1221 raid_dev->epthru_pool_handle,
1222 GFP_KERNEL,
1223 &epthru_pci_blk[i].dma_addr);
1224 if (!epthru_pci_blk[i].vaddr) {
1225 goto fail_setup_dma_pool;
1226 }
1227 }
1228
1229
1230 // Allocate memory for each scatter-gather list. Request for 512 bytes
1231 // alignment for each sg list
1232 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1233 adapter->pdev,
1234 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1235 512, 0);
1236
1237 if (raid_dev->sg_pool_handle == NULL) {
1238 goto fail_setup_dma_pool;
1239 }
1240
1241 sg_pci_blk = raid_dev->sg_pool;
1242 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1243 sg_pci_blk[i].vaddr = pci_pool_alloc(
1244 raid_dev->sg_pool_handle,
1245 GFP_KERNEL,
1246 &sg_pci_blk[i].dma_addr);
1247 if (!sg_pci_blk[i].vaddr) {
1248 goto fail_setup_dma_pool;
1249 }
1250 }
1251
1252 return 0;
1253
1254 fail_setup_dma_pool:
1255 megaraid_mbox_teardown_dma_pools(adapter);
1256 return -1;
1257 }
1258
1259
1260 /**
1261 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1262 * @adapter : HBA soft state
1263 *
1264 * Teardown the dma pool for mailbox, passthru and extended passthru
1265 * structures, and scatter-gather lists.
1266 */
1267 static void
1268 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1269 {
1270 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1271 struct mraid_pci_blk *epthru_pci_blk;
1272 struct mraid_pci_blk *sg_pci_blk;
1273 struct mraid_pci_blk *mbox_pci_blk;
1274 int i;
1275
1276
1277 sg_pci_blk = raid_dev->sg_pool;
1278 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1279 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1280 sg_pci_blk[i].dma_addr);
1281 }
1282 if (raid_dev->sg_pool_handle)
1283 pci_pool_destroy(raid_dev->sg_pool_handle);
1284
1285
1286 epthru_pci_blk = raid_dev->epthru_pool;
1287 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1288 pci_pool_free(raid_dev->epthru_pool_handle,
1289 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1290 }
1291 if (raid_dev->epthru_pool_handle)
1292 pci_pool_destroy(raid_dev->epthru_pool_handle);
1293
1294
1295 mbox_pci_blk = raid_dev->mbox_pool;
1296 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1297 pci_pool_free(raid_dev->mbox_pool_handle,
1298 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1299 }
1300 if (raid_dev->mbox_pool_handle)
1301 pci_pool_destroy(raid_dev->mbox_pool_handle);
1302
1303 return;
1304 }
1305
1306
1307 /**
1308 * megaraid_alloc_scb - detach and return a scb from the free list
1309 * @adapter : controller's soft state
1310 * @scp : pointer to the scsi command to be executed
1311 *
1312 * Return the scb from the head of the free list. %NULL if there are none
1313 * available.
1314 */
1315 static scb_t *
1316 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1317 {
1318 struct list_head *head = &adapter->kscb_pool;
1319 scb_t *scb = NULL;
1320 unsigned long flags;
1321
1322 // detach scb from free pool
1323 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1324
1325 if (list_empty(head)) {
1326 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1327 return NULL;
1328 }
1329
1330 scb = list_entry(head->next, scb_t, list);
1331 list_del_init(&scb->list);
1332
1333 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1334
1335 scb->state = SCB_ACTIVE;
1336 scb->scp = scp;
1337 scb->dma_type = MRAID_DMA_NONE;
1338
1339 return scb;
1340 }
1341
1342
1343 /**
1344 * megaraid_dealloc_scb - return the scb to the free pool
1345 * @adapter : controller's soft state
1346 * @scb : scb to be freed
1347 *
1348 * Return the scb back to the free list of scbs. The caller must 'flush' the
1349 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1350 * NOTE NOTE: Make sure the scb is not on any list before calling this
1351 * routine.
1352 */
1353 static inline void
1354 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1355 {
1356 unsigned long flags;
1357
1358 // put scb in the free pool
1359 scb->state = SCB_FREE;
1360 scb->scp = NULL;
1361 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1362
1363 list_add(&scb->list, &adapter->kscb_pool);
1364
1365 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1366
1367 return;
1368 }
1369
1370
1371 /**
1372 * megaraid_mbox_mksgl - make the scatter-gather list
1373 * @adapter : controller's soft state
1374 * @scb : scsi control block
1375 *
1376 * Prepare the scatter-gather list.
1377 */
1378 static int
1379 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1380 {
1381 struct scatterlist *sgl;
1382 mbox_ccb_t *ccb;
1383 struct scsi_cmnd *scp;
1384 int sgcnt;
1385 int i;
1386
1387
1388 scp = scb->scp;
1389 ccb = (mbox_ccb_t *)scb->ccb;
1390
1391 sgcnt = scsi_dma_map(scp);
1392 BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen);
1393
1394 // no mapping required if no data to be transferred
1395 if (!sgcnt)
1396 return 0;
1397
1398 scb->dma_type = MRAID_DMA_WSG;
1399
1400 scsi_for_each_sg(scp, sgl, sgcnt, i) {
1401 ccb->sgl64[i].address = sg_dma_address(sgl);
1402 ccb->sgl64[i].length = sg_dma_len(sgl);
1403 }
1404
1405 // Return count of SG nodes
1406 return sgcnt;
1407 }
1408
1409
1410 /**
1411 * mbox_post_cmd - issue a mailbox command
1412 * @adapter : controller's soft state
1413 * @scb : command to be issued
1414 *
1415 * Post the command to the controller if mailbox is available.
1416 */
1417 static int
1418 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1419 {
1420 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1421 mbox64_t *mbox64;
1422 mbox_t *mbox;
1423 mbox_ccb_t *ccb;
1424 unsigned long flags;
1425 unsigned int i = 0;
1426
1427
1428 ccb = (mbox_ccb_t *)scb->ccb;
1429 mbox = raid_dev->mbox;
1430 mbox64 = raid_dev->mbox64;
1431
1432 /*
1433 * Check for busy mailbox. If it is, return failure - the caller
1434 * should retry later.
1435 */
1436 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1437
1438 if (unlikely(mbox->busy)) {
1439 do {
1440 udelay(1);
1441 i++;
1442 rmb();
1443 } while(mbox->busy && (i < max_mbox_busy_wait));
1444
1445 if (mbox->busy) {
1446
1447 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1448
1449 return -1;
1450 }
1451 }
1452
1453
1454 // Copy this command's mailbox data into "adapter's" mailbox
1455 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1456 mbox->cmdid = scb->sno;
1457
1458 adapter->outstanding_cmds++;
1459
1460 if (scb->dma_direction == PCI_DMA_TODEVICE)
1461 pci_dma_sync_sg_for_device(adapter->pdev,
1462 scsi_sglist(scb->scp),
1463 scsi_sg_count(scb->scp),
1464 PCI_DMA_TODEVICE);
1465
1466 mbox->busy = 1; // Set busy
1467 mbox->poll = 0;
1468 mbox->ack = 0;
1469 wmb();
1470
1471 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1472
1473 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1474
1475 return 0;
1476 }
1477
1478
1479 /**
1480 * megaraid_queue_command - generic queue entry point for all LLDs
1481 * @scp : pointer to the scsi command to be executed
1482 * @done : callback routine to be called after the cmd has be completed
1483 *
1484 * Queue entry point for mailbox based controllers.
1485 */
1486 static int
1487 megaraid_queue_command(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *))
1488 {
1489 adapter_t *adapter;
1490 scb_t *scb;
1491 int if_busy;
1492
1493 adapter = SCP2ADAPTER(scp);
1494 scp->scsi_done = done;
1495 scp->result = 0;
1496
1497 /*
1498 * Allocate and build a SCB request
1499 * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1500 * not allocate scb. We will return non-zero status in that case.
1501 * NOTE: scb can be null even though certain commands completed
1502 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1503 * return 0 in that case, and we would do the callback right away.
1504 */
1505 if_busy = 0;
1506 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1507 if (!scb) { // command already completed
1508 done(scp);
1509 return 0;
1510 }
1511
1512 megaraid_mbox_runpendq(adapter, scb);
1513 return if_busy;
1514 }
1515
1516 /**
1517 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
1518 * @adapter : controller's soft state
1519 * @scp : mid-layer scsi command pointer
1520 * @busy : set if request could not be completed because of lack of
1521 * resources
1522 *
1523 * Transform the mid-layer scsi command to megaraid firmware lingua.
1524 * Convert the command issued by mid-layer to format understood by megaraid
1525 * firmware. We also complete certain commands without sending them to firmware.
1526 */
1527 static scb_t *
1528 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1529 {
1530 mraid_device_t *rdev = ADAP2RAIDDEV(adapter);
1531 int channel;
1532 int target;
1533 int islogical;
1534 mbox_ccb_t *ccb;
1535 mraid_passthru_t *pthru;
1536 mbox64_t *mbox64;
1537 mbox_t *mbox;
1538 scb_t *scb;
1539 char skip[] = "skipping";
1540 char scan[] = "scanning";
1541 char *ss;
1542
1543
1544 /*
1545 * Get the appropriate device map for the device this command is
1546 * intended for
1547 */
1548 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1549
1550 /*
1551 * Logical drive commands
1552 */
1553 if (islogical) {
1554 switch (scp->cmnd[0]) {
1555 case TEST_UNIT_READY:
1556 /*
1557 * Do we support clustering and is the support enabled
1558 * If no, return success always
1559 */
1560 if (!adapter->ha) {
1561 scp->result = (DID_OK << 16);
1562 return NULL;
1563 }
1564
1565 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1566 scp->result = (DID_ERROR << 16);
1567 *busy = 1;
1568 return NULL;
1569 }
1570
1571 scb->dma_direction = scp->sc_data_direction;
1572 scb->dev_channel = 0xFF;
1573 scb->dev_target = target;
1574 ccb = (mbox_ccb_t *)scb->ccb;
1575
1576 /*
1577 * The command id will be provided by the command
1578 * issuance routine
1579 */
1580 ccb->raw_mbox[0] = CLUSTER_CMD;
1581 ccb->raw_mbox[2] = RESERVATION_STATUS;
1582 ccb->raw_mbox[3] = target;
1583
1584 return scb;
1585
1586 case MODE_SENSE:
1587 {
1588 struct scatterlist *sgl;
1589 caddr_t vaddr;
1590
1591 sgl = scsi_sglist(scp);
1592 if (sg_page(sgl)) {
1593 vaddr = (caddr_t) sg_virt(&sgl[0]);
1594
1595 memset(vaddr, 0, scp->cmnd[4]);
1596 }
1597 else {
1598 con_log(CL_ANN, (KERN_WARNING
1599 "megaraid mailbox: invalid sg:%d\n",
1600 __LINE__));
1601 }
1602 }
1603 scp->result = (DID_OK << 16);
1604 return NULL;
1605
1606 case INQUIRY:
1607 /*
1608 * Display the channel scan for logical drives
1609 * Do not display scan for a channel if already done.
1610 */
1611 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1612
1613 con_log(CL_ANN, (KERN_INFO
1614 "scsi[%d]: scanning scsi channel %d",
1615 adapter->host->host_no,
1616 SCP2CHANNEL(scp)));
1617
1618 con_log(CL_ANN, (
1619 " [virtual] for logical drives\n"));
1620
1621 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1622 }
1623
1624 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1625 scp->sense_buffer[0] = 0x70;
1626 scp->sense_buffer[2] = ILLEGAL_REQUEST;
1627 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB;
1628 scp->result = CHECK_CONDITION << 1;
1629 return NULL;
1630 }
1631
1632 /* Fall through */
1633
1634 case READ_CAPACITY:
1635 /*
1636 * Do not allow LUN > 0 for logical drives and
1637 * requests for more than 40 logical drives
1638 */
1639 if (SCP2LUN(scp)) {
1640 scp->result = (DID_BAD_TARGET << 16);
1641 return NULL;
1642 }
1643 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1644 scp->result = (DID_BAD_TARGET << 16);
1645 return NULL;
1646 }
1647
1648
1649 /* Allocate a SCB and initialize passthru */
1650 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1651 scp->result = (DID_ERROR << 16);
1652 *busy = 1;
1653 return NULL;
1654 }
1655
1656 ccb = (mbox_ccb_t *)scb->ccb;
1657 scb->dev_channel = 0xFF;
1658 scb->dev_target = target;
1659 pthru = ccb->pthru;
1660 mbox = ccb->mbox;
1661 mbox64 = ccb->mbox64;
1662
1663 pthru->timeout = 0;
1664 pthru->ars = 1;
1665 pthru->reqsenselen = 14;
1666 pthru->islogical = 1;
1667 pthru->logdrv = target;
1668 pthru->cdblen = scp->cmd_len;
1669 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1670
1671 mbox->cmd = MBOXCMD_PASSTHRU64;
1672 scb->dma_direction = scp->sc_data_direction;
1673
1674 pthru->dataxferlen = scsi_bufflen(scp);
1675 pthru->dataxferaddr = ccb->sgl_dma_h;
1676 pthru->numsge = megaraid_mbox_mksgl(adapter,
1677 scb);
1678
1679 mbox->xferaddr = 0xFFFFFFFF;
1680 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h;
1681 mbox64->xferaddr_hi = 0;
1682
1683 return scb;
1684
1685 case READ_6:
1686 case WRITE_6:
1687 case READ_10:
1688 case WRITE_10:
1689 case READ_12:
1690 case WRITE_12:
1691
1692 /*
1693 * Allocate a SCB and initialize mailbox
1694 */
1695 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1696 scp->result = (DID_ERROR << 16);
1697 *busy = 1;
1698 return NULL;
1699 }
1700 ccb = (mbox_ccb_t *)scb->ccb;
1701 scb->dev_channel = 0xFF;
1702 scb->dev_target = target;
1703 mbox = ccb->mbox;
1704 mbox64 = ccb->mbox64;
1705 mbox->logdrv = target;
1706
1707 /*
1708 * A little HACK: 2nd bit is zero for all scsi read
1709 * commands and is set for all scsi write commands
1710 */
1711 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64:
1712 MBOXCMD_LREAD64 ;
1713
1714 /*
1715 * 6-byte READ(0x08) or WRITE(0x0A) cdb
1716 */
1717 if (scp->cmd_len == 6) {
1718 mbox->numsectors = (uint32_t)scp->cmnd[4];
1719 mbox->lba =
1720 ((uint32_t)scp->cmnd[1] << 16) |
1721 ((uint32_t)scp->cmnd[2] << 8) |
1722 (uint32_t)scp->cmnd[3];
1723
1724 mbox->lba &= 0x1FFFFF;
1725 }
1726
1727 /*
1728 * 10-byte READ(0x28) or WRITE(0x2A) cdb
1729 */
1730 else if (scp->cmd_len == 10) {
1731 mbox->numsectors =
1732 (uint32_t)scp->cmnd[8] |
1733 ((uint32_t)scp->cmnd[7] << 8);
1734 mbox->lba =
1735 ((uint32_t)scp->cmnd[2] << 24) |
1736 ((uint32_t)scp->cmnd[3] << 16) |
1737 ((uint32_t)scp->cmnd[4] << 8) |
1738 (uint32_t)scp->cmnd[5];
1739 }
1740
1741 /*
1742 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1743 */
1744 else if (scp->cmd_len == 12) {
1745 mbox->lba =
1746 ((uint32_t)scp->cmnd[2] << 24) |
1747 ((uint32_t)scp->cmnd[3] << 16) |
1748 ((uint32_t)scp->cmnd[4] << 8) |
1749 (uint32_t)scp->cmnd[5];
1750
1751 mbox->numsectors =
1752 ((uint32_t)scp->cmnd[6] << 24) |
1753 ((uint32_t)scp->cmnd[7] << 16) |
1754 ((uint32_t)scp->cmnd[8] << 8) |
1755 (uint32_t)scp->cmnd[9];
1756 }
1757 else {
1758 con_log(CL_ANN, (KERN_WARNING
1759 "megaraid: unsupported CDB length\n"));
1760
1761 megaraid_dealloc_scb(adapter, scb);
1762
1763 scp->result = (DID_ERROR << 16);
1764 return NULL;
1765 }
1766
1767 scb->dma_direction = scp->sc_data_direction;
1768
1769 // Calculate Scatter-Gather info
1770 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h;
1771 mbox->numsge = megaraid_mbox_mksgl(adapter,
1772 scb);
1773 mbox->xferaddr = 0xFFFFFFFF;
1774 mbox64->xferaddr_hi = 0;
1775
1776 return scb;
1777
1778 case RESERVE:
1779 case RELEASE:
1780 /*
1781 * Do we support clustering and is the support enabled
1782 */
1783 if (!adapter->ha) {
1784 scp->result = (DID_BAD_TARGET << 16);
1785 return NULL;
1786 }
1787
1788 /*
1789 * Allocate a SCB and initialize mailbox
1790 */
1791 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1792 scp->result = (DID_ERROR << 16);
1793 *busy = 1;
1794 return NULL;
1795 }
1796
1797 ccb = (mbox_ccb_t *)scb->ccb;
1798 scb->dev_channel = 0xFF;
1799 scb->dev_target = target;
1800 ccb->raw_mbox[0] = CLUSTER_CMD;
1801 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ?
1802 RESERVE_LD : RELEASE_LD;
1803
1804 ccb->raw_mbox[3] = target;
1805 scb->dma_direction = scp->sc_data_direction;
1806
1807 return scb;
1808
1809 default:
1810 scp->result = (DID_BAD_TARGET << 16);
1811 return NULL;
1812 }
1813 }
1814 else { // Passthru device commands
1815
1816 // Do not allow access to target id > 15 or LUN > 7
1817 if (target > 15 || SCP2LUN(scp) > 7) {
1818 scp->result = (DID_BAD_TARGET << 16);
1819 return NULL;
1820 }
1821
1822 // if fast load option was set and scan for last device is
1823 // over, reset the fast_load flag so that during a possible
1824 // next scan, devices can be made available
1825 if (rdev->fast_load && (target == 15) &&
1826 (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1827
1828 con_log(CL_ANN, (KERN_INFO
1829 "megaraid[%d]: physical device scan re-enabled\n",
1830 adapter->host->host_no));
1831 rdev->fast_load = 0;
1832 }
1833
1834 /*
1835 * Display the channel scan for physical devices
1836 */
1837 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1838
1839 ss = rdev->fast_load ? skip : scan;
1840
1841 con_log(CL_ANN, (KERN_INFO
1842 "scsi[%d]: %s scsi channel %d [Phy %d]",
1843 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1844 channel));
1845
1846 con_log(CL_ANN, (
1847 " for non-raid devices\n"));
1848
1849 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1850 }
1851
1852 // disable channel sweep if fast load option given
1853 if (rdev->fast_load) {
1854 scp->result = (DID_BAD_TARGET << 16);
1855 return NULL;
1856 }
1857
1858 // Allocate a SCB and initialize passthru
1859 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1860 scp->result = (DID_ERROR << 16);
1861 *busy = 1;
1862 return NULL;
1863 }
1864
1865 ccb = (mbox_ccb_t *)scb->ccb;
1866 scb->dev_channel = channel;
1867 scb->dev_target = target;
1868 scb->dma_direction = scp->sc_data_direction;
1869 mbox = ccb->mbox;
1870 mbox64 = ccb->mbox64;
1871
1872 // Does this firmware support extended CDBs
1873 if (adapter->max_cdb_sz == 16) {
1874 mbox->cmd = MBOXCMD_EXTPTHRU;
1875
1876 megaraid_mbox_prepare_epthru(adapter, scb, scp);
1877
1878 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h;
1879 mbox64->xferaddr_hi = 0;
1880 mbox->xferaddr = 0xFFFFFFFF;
1881 }
1882 else {
1883 mbox->cmd = MBOXCMD_PASSTHRU64;
1884
1885 megaraid_mbox_prepare_pthru(adapter, scb, scp);
1886
1887 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h;
1888 mbox64->xferaddr_hi = 0;
1889 mbox->xferaddr = 0xFFFFFFFF;
1890 }
1891 return scb;
1892 }
1893
1894 // NOT REACHED
1895 }
1896
1897
1898 /**
1899 * megaraid_mbox_runpendq - execute commands queued in the pending queue
1900 * @adapter : controller's soft state
1901 * @scb_q : SCB to be queued in the pending list
1902 *
1903 * Scan the pending list for commands which are not yet issued and try to
1904 * post to the controller. The SCB can be a null pointer, which would indicate
1905 * no SCB to be queue, just try to execute the ones in the pending list.
1906 *
1907 * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1908 * out from the head of the pending list. If it is successfully issued, the
1909 * next SCB is at the head now.
1910 */
1911 static void
1912 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1913 {
1914 scb_t *scb;
1915 unsigned long flags;
1916
1917 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1918
1919 if (scb_q) {
1920 scb_q->state = SCB_PENDQ;
1921 list_add_tail(&scb_q->list, &adapter->pend_list);
1922 }
1923
1924 // if the adapter in not in quiescent mode, post the commands to FW
1925 if (adapter->quiescent) {
1926 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1927 return;
1928 }
1929
1930 while (!list_empty(&adapter->pend_list)) {
1931
1932 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1933
1934 scb = list_entry(adapter->pend_list.next, scb_t, list);
1935
1936 // remove the scb from the pending list and try to
1937 // issue. If we are unable to issue it, put back in
1938 // the pending list and return
1939
1940 list_del_init(&scb->list);
1941
1942 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1943
1944 // if mailbox was busy, return SCB back to pending
1945 // list. Make sure to add at the head, since that's
1946 // where it would have been removed from
1947
1948 scb->state = SCB_ISSUED;
1949
1950 if (mbox_post_cmd(adapter, scb) != 0) {
1951
1952 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1953
1954 scb->state = SCB_PENDQ;
1955
1956 list_add(&scb->list, &adapter->pend_list);
1957
1958 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1959 flags);
1960
1961 return;
1962 }
1963
1964 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1965 }
1966
1967 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1968
1969
1970 return;
1971 }
1972
1973
1974 /**
1975 * megaraid_mbox_prepare_pthru - prepare a command for physical devices
1976 * @adapter : pointer to controller's soft state
1977 * @scb : scsi control block
1978 * @scp : scsi command from the mid-layer
1979 *
1980 * Prepare a command for the scsi physical devices.
1981 */
1982 static void
1983 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1984 struct scsi_cmnd *scp)
1985 {
1986 mbox_ccb_t *ccb;
1987 mraid_passthru_t *pthru;
1988 uint8_t channel;
1989 uint8_t target;
1990
1991 ccb = (mbox_ccb_t *)scb->ccb;
1992 pthru = ccb->pthru;
1993 channel = scb->dev_channel;
1994 target = scb->dev_target;
1995
1996 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1997 pthru->timeout = 4;
1998 pthru->ars = 1;
1999 pthru->islogical = 0;
2000 pthru->channel = 0;
2001 pthru->target = (channel << 4) | target;
2002 pthru->logdrv = SCP2LUN(scp);
2003 pthru->reqsenselen = 14;
2004 pthru->cdblen = scp->cmd_len;
2005
2006 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2007
2008 if (scsi_bufflen(scp)) {
2009 pthru->dataxferlen = scsi_bufflen(scp);
2010 pthru->dataxferaddr = ccb->sgl_dma_h;
2011 pthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2012 }
2013 else {
2014 pthru->dataxferaddr = 0;
2015 pthru->dataxferlen = 0;
2016 pthru->numsge = 0;
2017 }
2018 return;
2019 }
2020
2021
2022 /**
2023 * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2024 * @adapter : pointer to controller's soft state
2025 * @scb : scsi control block
2026 * @scp : scsi command from the mid-layer
2027 *
2028 * Prepare a command for the scsi physical devices. This rountine prepares
2029 * commands for devices which can take extended CDBs (>10 bytes).
2030 */
2031 static void
2032 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2033 struct scsi_cmnd *scp)
2034 {
2035 mbox_ccb_t *ccb;
2036 mraid_epassthru_t *epthru;
2037 uint8_t channel;
2038 uint8_t target;
2039
2040 ccb = (mbox_ccb_t *)scb->ccb;
2041 epthru = ccb->epthru;
2042 channel = scb->dev_channel;
2043 target = scb->dev_target;
2044
2045 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2046 epthru->timeout = 4;
2047 epthru->ars = 1;
2048 epthru->islogical = 0;
2049 epthru->channel = 0;
2050 epthru->target = (channel << 4) | target;
2051 epthru->logdrv = SCP2LUN(scp);
2052 epthru->reqsenselen = 14;
2053 epthru->cdblen = scp->cmd_len;
2054
2055 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2056
2057 if (scsi_bufflen(scp)) {
2058 epthru->dataxferlen = scsi_bufflen(scp);
2059 epthru->dataxferaddr = ccb->sgl_dma_h;
2060 epthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2061 }
2062 else {
2063 epthru->dataxferaddr = 0;
2064 epthru->dataxferlen = 0;
2065 epthru->numsge = 0;
2066 }
2067 return;
2068 }
2069
2070
2071 /**
2072 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2073 * @adapter : controller's soft state
2074 *
2075 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
2076 * completed command and put them on the completed list for later processing.
2077 *
2078 * Returns: 1 if the interrupt is valid, 0 otherwise
2079 */
2080 static int
2081 megaraid_ack_sequence(adapter_t *adapter)
2082 {
2083 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2084 mbox_t *mbox;
2085 scb_t *scb;
2086 uint8_t nstatus;
2087 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS];
2088 struct list_head clist;
2089 int handled;
2090 uint32_t dword;
2091 unsigned long flags;
2092 int i, j;
2093
2094
2095 mbox = raid_dev->mbox;
2096
2097 // move the SCBs from the firmware completed array to our local list
2098 INIT_LIST_HEAD(&clist);
2099
2100 // loop till F/W has more commands for us to complete
2101 handled = 0;
2102 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2103 do {
2104 /*
2105 * Check if a valid interrupt is pending. If found, force the
2106 * interrupt line low.
2107 */
2108 dword = RDOUTDOOR(raid_dev);
2109 if (dword != 0x10001234) break;
2110
2111 handled = 1;
2112
2113 WROUTDOOR(raid_dev, 0x10001234);
2114
2115 nstatus = 0;
2116 // wait for valid numstatus to post
2117 for (i = 0; i < 0xFFFFF; i++) {
2118 if (mbox->numstatus != 0xFF) {
2119 nstatus = mbox->numstatus;
2120 break;
2121 }
2122 rmb();
2123 }
2124 mbox->numstatus = 0xFF;
2125
2126 adapter->outstanding_cmds -= nstatus;
2127
2128 for (i = 0; i < nstatus; i++) {
2129
2130 // wait for valid command index to post
2131 for (j = 0; j < 0xFFFFF; j++) {
2132 if (mbox->completed[i] != 0xFF) break;
2133 rmb();
2134 }
2135 completed[i] = mbox->completed[i];
2136 mbox->completed[i] = 0xFF;
2137
2138 if (completed[i] == 0xFF) {
2139 con_log(CL_ANN, (KERN_CRIT
2140 "megaraid: command posting timed out\n"));
2141
2142 BUG();
2143 continue;
2144 }
2145
2146 // Get SCB associated with this command id
2147 if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2148 // a cmm command
2149 scb = adapter->uscb_list + (completed[i] -
2150 MBOX_MAX_SCSI_CMDS);
2151 }
2152 else {
2153 // an os command
2154 scb = adapter->kscb_list + completed[i];
2155 }
2156
2157 scb->status = mbox->status;
2158 list_add_tail(&scb->list, &clist);
2159 }
2160
2161 // Acknowledge interrupt
2162 WRINDOOR(raid_dev, 0x02);
2163
2164 } while(1);
2165
2166 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2167
2168
2169 // put the completed commands in the completed list. DPC would
2170 // complete these commands later
2171 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2172
2173 list_splice(&clist, &adapter->completed_list);
2174
2175 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2176
2177
2178 // schedule the DPC if there is some work for it
2179 if (handled)
2180 tasklet_schedule(&adapter->dpc_h);
2181
2182 return handled;
2183 }
2184
2185
2186 /**
2187 * megaraid_isr - isr for memory based mailbox based controllers
2188 * @irq : irq
2189 * @devp : pointer to our soft state
2190 *
2191 * Interrupt service routine for memory-mapped mailbox controllers.
2192 */
2193 static irqreturn_t
2194 megaraid_isr(int irq, void *devp)
2195 {
2196 adapter_t *adapter = devp;
2197 int handled;
2198
2199 handled = megaraid_ack_sequence(adapter);
2200
2201 /* Loop through any pending requests */
2202 if (!adapter->quiescent) {
2203 megaraid_mbox_runpendq(adapter, NULL);
2204 }
2205
2206 return IRQ_RETVAL(handled);
2207 }
2208
2209
2210 /**
2211 * megaraid_mbox_sync_scb - sync kernel buffers
2212 * @adapter : controller's soft state
2213 * @scb : pointer to the resource packet
2214 *
2215 * DMA sync if required.
2216 */
2217 static void
2218 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2219 {
2220 mbox_ccb_t *ccb;
2221
2222 ccb = (mbox_ccb_t *)scb->ccb;
2223
2224 if (scb->dma_direction == PCI_DMA_FROMDEVICE)
2225 pci_dma_sync_sg_for_cpu(adapter->pdev,
2226 scsi_sglist(scb->scp),
2227 scsi_sg_count(scb->scp),
2228 PCI_DMA_FROMDEVICE);
2229
2230 scsi_dma_unmap(scb->scp);
2231 return;
2232 }
2233
2234
2235 /**
2236 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2237 * @devp : pointer to HBA soft state
2238 *
2239 * Pick up the commands from the completed list and send back to the owners.
2240 * This is a reentrant function and does not assume any locks are held while
2241 * it is being called.
2242 */
2243 static void
2244 megaraid_mbox_dpc(unsigned long devp)
2245 {
2246 adapter_t *adapter = (adapter_t *)devp;
2247 mraid_device_t *raid_dev;
2248 struct list_head clist;
2249 struct scatterlist *sgl;
2250 scb_t *scb;
2251 scb_t *tmp;
2252 struct scsi_cmnd *scp;
2253 mraid_passthru_t *pthru;
2254 mraid_epassthru_t *epthru;
2255 mbox_ccb_t *ccb;
2256 int islogical;
2257 int pdev_index;
2258 int pdev_state;
2259 mbox_t *mbox;
2260 unsigned long flags;
2261 uint8_t c;
2262 int status;
2263 uioc_t *kioc;
2264
2265
2266 if (!adapter) return;
2267
2268 raid_dev = ADAP2RAIDDEV(adapter);
2269
2270 // move the SCBs from the completed list to our local list
2271 INIT_LIST_HEAD(&clist);
2272
2273 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2274
2275 list_splice_init(&adapter->completed_list, &clist);
2276
2277 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2278
2279
2280 list_for_each_entry_safe(scb, tmp, &clist, list) {
2281
2282 status = scb->status;
2283 scp = scb->scp;
2284 ccb = (mbox_ccb_t *)scb->ccb;
2285 pthru = ccb->pthru;
2286 epthru = ccb->epthru;
2287 mbox = ccb->mbox;
2288
2289 // Make sure f/w has completed a valid command
2290 if (scb->state != SCB_ISSUED) {
2291 con_log(CL_ANN, (KERN_CRIT
2292 "megaraid critical err: invalid command %d:%d:%p\n",
2293 scb->sno, scb->state, scp));
2294 BUG();
2295 continue; // Must never happen!
2296 }
2297
2298 // check for the management command and complete it right away
2299 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2300 scb->state = SCB_FREE;
2301 scb->status = status;
2302
2303 // remove from local clist
2304 list_del_init(&scb->list);
2305
2306 kioc = (uioc_t *)scb->gp;
2307 kioc->status = 0;
2308
2309 megaraid_mbox_mm_done(adapter, scb);
2310
2311 continue;
2312 }
2313
2314 // Was an abort issued for this command earlier
2315 if (scb->state & SCB_ABORT) {
2316 con_log(CL_ANN, (KERN_NOTICE
2317 "megaraid: aborted cmd %lx[%x] completed\n",
2318 scp->serial_number, scb->sno));
2319 }
2320
2321 /*
2322 * If the inquiry came of a disk drive which is not part of
2323 * any RAID array, expose it to the kernel. For this to be
2324 * enabled, user must set the "megaraid_expose_unconf_disks"
2325 * flag to 1 by specifying it on module parameter list.
2326 * This would enable data migration off drives from other
2327 * configurations.
2328 */
2329 islogical = MRAID_IS_LOGICAL(adapter, scp);
2330 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2331 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2332
2333 sgl = scsi_sglist(scp);
2334 if (sg_page(sgl)) {
2335 c = *(unsigned char *) sg_virt(&sgl[0]);
2336 } else {
2337 con_log(CL_ANN, (KERN_WARNING
2338 "megaraid mailbox: invalid sg:%d\n",
2339 __LINE__));
2340 c = 0;
2341 }
2342
2343 if ((c & 0x1F ) == TYPE_DISK) {
2344 pdev_index = (scb->dev_channel * 16) +
2345 scb->dev_target;
2346 pdev_state =
2347 raid_dev->pdrv_state[pdev_index] & 0x0F;
2348
2349 if (pdev_state == PDRV_ONLINE ||
2350 pdev_state == PDRV_FAILED ||
2351 pdev_state == PDRV_RBLD ||
2352 pdev_state == PDRV_HOTSPARE ||
2353 megaraid_expose_unconf_disks == 0) {
2354
2355 status = 0xF0;
2356 }
2357 }
2358 }
2359
2360 // Convert MegaRAID status to Linux error code
2361 switch (status) {
2362
2363 case 0x00:
2364
2365 scp->result = (DID_OK << 16);
2366 break;
2367
2368 case 0x02:
2369
2370 /* set sense_buffer and result fields */
2371 if (mbox->cmd == MBOXCMD_PASSTHRU ||
2372 mbox->cmd == MBOXCMD_PASSTHRU64) {
2373
2374 memcpy(scp->sense_buffer, pthru->reqsensearea,
2375 14);
2376
2377 scp->result = DRIVER_SENSE << 24 |
2378 DID_OK << 16 | CHECK_CONDITION << 1;
2379 }
2380 else {
2381 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2382
2383 memcpy(scp->sense_buffer,
2384 epthru->reqsensearea, 14);
2385
2386 scp->result = DRIVER_SENSE << 24 |
2387 DID_OK << 16 |
2388 CHECK_CONDITION << 1;
2389 } else {
2390 scp->sense_buffer[0] = 0x70;
2391 scp->sense_buffer[2] = ABORTED_COMMAND;
2392 scp->result = CHECK_CONDITION << 1;
2393 }
2394 }
2395 break;
2396
2397 case 0x08:
2398
2399 scp->result = DID_BUS_BUSY << 16 | status;
2400 break;
2401
2402 default:
2403
2404 /*
2405 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2406 * failed
2407 */
2408 if (scp->cmnd[0] == TEST_UNIT_READY) {
2409 scp->result = DID_ERROR << 16 |
2410 RESERVATION_CONFLICT << 1;
2411 }
2412 else
2413 /*
2414 * Error code returned is 1 if Reserve or Release
2415 * failed or the input parameter is invalid
2416 */
2417 if (status == 1 && (scp->cmnd[0] == RESERVE ||
2418 scp->cmnd[0] == RELEASE)) {
2419
2420 scp->result = DID_ERROR << 16 |
2421 RESERVATION_CONFLICT << 1;
2422 }
2423 else {
2424 scp->result = DID_BAD_TARGET << 16 | status;
2425 }
2426 }
2427
2428 // print a debug message for all failed commands
2429 if (status) {
2430 megaraid_mbox_display_scb(adapter, scb);
2431 }
2432
2433 // Free our internal resources and call the mid-layer callback
2434 // routine
2435 megaraid_mbox_sync_scb(adapter, scb);
2436
2437 // remove from local clist
2438 list_del_init(&scb->list);
2439
2440 // put back in free list
2441 megaraid_dealloc_scb(adapter, scb);
2442
2443 // send the scsi packet back to kernel
2444 scp->scsi_done(scp);
2445 }
2446
2447 return;
2448 }
2449
2450
2451 /**
2452 * megaraid_abort_handler - abort the scsi command
2453 * @scp : command to be aborted
2454 *
2455 * Abort a previous SCSI request. Only commands on the pending list can be
2456 * aborted. All the commands issued to the F/W must complete.
2457 **/
2458 static int
2459 megaraid_abort_handler(struct scsi_cmnd *scp)
2460 {
2461 adapter_t *adapter;
2462 mraid_device_t *raid_dev;
2463 scb_t *scb;
2464 scb_t *tmp;
2465 int found;
2466 unsigned long flags;
2467 int i;
2468
2469
2470 adapter = SCP2ADAPTER(scp);
2471 raid_dev = ADAP2RAIDDEV(adapter);
2472
2473 con_log(CL_ANN, (KERN_WARNING
2474 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2475 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2476 SCP2TARGET(scp), SCP2LUN(scp)));
2477
2478 // If FW has stopped responding, simply return failure
2479 if (raid_dev->hw_error) {
2480 con_log(CL_ANN, (KERN_NOTICE
2481 "megaraid: hw error, not aborting\n"));
2482 return FAILED;
2483 }
2484
2485 // There might a race here, where the command was completed by the
2486 // firmware and now it is on the completed list. Before we could
2487 // complete the command to the kernel in dpc, the abort came.
2488 // Find out if this is the case to avoid the race.
2489 scb = NULL;
2490 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2491 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2492
2493 if (scb->scp == scp) { // Found command
2494
2495 list_del_init(&scb->list); // from completed list
2496
2497 con_log(CL_ANN, (KERN_WARNING
2498 "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2499 scp->serial_number, scb->sno,
2500 scb->dev_channel, scb->dev_target));
2501
2502 scp->result = (DID_ABORT << 16);
2503 scp->scsi_done(scp);
2504
2505 megaraid_dealloc_scb(adapter, scb);
2506
2507 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2508 flags);
2509
2510 return SUCCESS;
2511 }
2512 }
2513 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2514
2515
2516 // Find out if this command is still on the pending list. If it is and
2517 // was never issued, abort and return success. If the command is owned
2518 // by the firmware, we must wait for it to complete by the FW.
2519 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2520 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2521
2522 if (scb->scp == scp) { // Found command
2523
2524 list_del_init(&scb->list); // from pending list
2525
2526 ASSERT(!(scb->state & SCB_ISSUED));
2527
2528 con_log(CL_ANN, (KERN_WARNING
2529 "megaraid abort: %ld[%d:%d], driver owner\n",
2530 scp->serial_number, scb->dev_channel,
2531 scb->dev_target));
2532
2533 scp->result = (DID_ABORT << 16);
2534 scp->scsi_done(scp);
2535
2536 megaraid_dealloc_scb(adapter, scb);
2537
2538 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2539 flags);
2540
2541 return SUCCESS;
2542 }
2543 }
2544 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2545
2546
2547 // Check do we even own this command, in which case this would be
2548 // owned by the firmware. The only way to locate the FW scb is to
2549 // traverse through the list of all SCB, since driver does not
2550 // maintain these SCBs on any list
2551 found = 0;
2552 spin_lock_irq(&adapter->lock);
2553 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2554 scb = adapter->kscb_list + i;
2555
2556 if (scb->scp == scp) {
2557
2558 found = 1;
2559
2560 if (!(scb->state & SCB_ISSUED)) {
2561 con_log(CL_ANN, (KERN_WARNING
2562 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2563 scp->serial_number, scb->sno, scb->dev_channel,
2564 scb->dev_target));
2565 BUG();
2566 }
2567 else {
2568 con_log(CL_ANN, (KERN_WARNING
2569 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2570 scp->serial_number, scb->sno, scb->dev_channel,
2571 scb->dev_target));
2572 }
2573 }
2574 }
2575 spin_unlock_irq(&adapter->lock);
2576
2577 if (!found) {
2578 con_log(CL_ANN, (KERN_WARNING
2579 "megaraid abort: scsi cmd:%ld, do now own\n",
2580 scp->serial_number));
2581
2582 // FIXME: Should there be a callback for this command?
2583 return SUCCESS;
2584 }
2585
2586 // We cannot actually abort a command owned by firmware, return
2587 // failure and wait for reset. In host reset handler, we will find out
2588 // if the HBA is still live
2589 return FAILED;
2590 }
2591
2592 /**
2593 * megaraid_reset_handler - device reset hadler for mailbox based driver
2594 * @scp : reference command
2595 *
2596 * Reset handler for the mailbox based controller. First try to find out if
2597 * the FW is still live, in which case the outstanding commands counter mut go
2598 * down to 0. If that happens, also issue the reservation reset command to
2599 * relinquish (possible) reservations on the logical drives connected to this
2600 * host.
2601 **/
2602 static int
2603 megaraid_reset_handler(struct scsi_cmnd *scp)
2604 {
2605 adapter_t *adapter;
2606 scb_t *scb;
2607 scb_t *tmp;
2608 mraid_device_t *raid_dev;
2609 unsigned long flags;
2610 uint8_t raw_mbox[sizeof(mbox_t)];
2611 int rval;
2612 int recovery_window;
2613 int recovering;
2614 int i;
2615 uioc_t *kioc;
2616
2617 adapter = SCP2ADAPTER(scp);
2618 raid_dev = ADAP2RAIDDEV(adapter);
2619
2620 // return failure if adapter is not responding
2621 if (raid_dev->hw_error) {
2622 con_log(CL_ANN, (KERN_NOTICE
2623 "megaraid: hw error, cannot reset\n"));
2624 return FAILED;
2625 }
2626
2627
2628 // Under exceptional conditions, FW can take up to 3 minutes to
2629 // complete command processing. Wait for additional 2 minutes for the
2630 // pending commands counter to go down to 0. If it doesn't, let the
2631 // controller be marked offline
2632 // Also, reset all the commands currently owned by the driver
2633 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2634 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2635 list_del_init(&scb->list); // from pending list
2636
2637 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2638 con_log(CL_ANN, (KERN_WARNING
2639 "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2640 scb->sno, scb->dev_channel, scb->dev_target));
2641
2642 scb->status = -1;
2643
2644 kioc = (uioc_t *)scb->gp;
2645 kioc->status = -EFAULT;
2646
2647 megaraid_mbox_mm_done(adapter, scb);
2648 } else {
2649 if (scb->scp == scp) { // Found command
2650 con_log(CL_ANN, (KERN_WARNING
2651 "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2652 scp->serial_number, scb->sno,
2653 scb->dev_channel, scb->dev_target));
2654 } else {
2655 con_log(CL_ANN, (KERN_WARNING
2656 "megaraid: IO packet with %d[%d:%d] being reset\n",
2657 scb->sno, scb->dev_channel, scb->dev_target));
2658 }
2659
2660 scb->scp->result = (DID_RESET << 16);
2661 scb->scp->scsi_done(scb->scp);
2662
2663 megaraid_dealloc_scb(adapter, scb);
2664 }
2665 }
2666 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2667
2668 if (adapter->outstanding_cmds) {
2669 con_log(CL_ANN, (KERN_NOTICE
2670 "megaraid: %d outstanding commands. Max wait %d sec\n",
2671 adapter->outstanding_cmds,
2672 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
2673 }
2674
2675 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2676
2677 recovering = adapter->outstanding_cmds;
2678
2679 for (i = 0; i < recovery_window; i++) {
2680
2681 megaraid_ack_sequence(adapter);
2682
2683 // print a message once every 5 seconds only
2684 if (!(i % 5)) {
2685 con_log(CL_ANN, (
2686 "megaraid mbox: Wait for %d commands to complete:%d\n",
2687 adapter->outstanding_cmds,
2688 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
2689 }
2690
2691 // bailout if no recovery happended in reset time
2692 if (adapter->outstanding_cmds == 0) {
2693 break;
2694 }
2695
2696 msleep(1000);
2697 }
2698
2699 spin_lock(&adapter->lock);
2700
2701 // If still outstanding commands, bail out
2702 if (adapter->outstanding_cmds) {
2703 con_log(CL_ANN, (KERN_WARNING
2704 "megaraid mbox: critical hardware error!\n"));
2705
2706 raid_dev->hw_error = 1;
2707
2708 rval = FAILED;
2709 goto out;
2710 }
2711 else {
2712 con_log(CL_ANN, (KERN_NOTICE
2713 "megaraid mbox: reset sequence completed successfully\n"));
2714 }
2715
2716
2717 // If the controller supports clustering, reset reservations
2718 if (!adapter->ha) {
2719 rval = SUCCESS;
2720 goto out;
2721 }
2722
2723 // clear reservations if any
2724 raw_mbox[0] = CLUSTER_CMD;
2725 raw_mbox[2] = RESET_RESERVATIONS;
2726
2727 rval = SUCCESS;
2728 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2729 con_log(CL_ANN,
2730 (KERN_INFO "megaraid: reservation reset\n"));
2731 }
2732 else {
2733 rval = FAILED;
2734 con_log(CL_ANN, (KERN_WARNING
2735 "megaraid: reservation reset failed\n"));
2736 }
2737
2738 out:
2739 spin_unlock_irq(&adapter->lock);
2740 return rval;
2741 }
2742
2743 /*
2744 * START: internal commands library
2745 *
2746 * This section of the driver has the common routine used by the driver and
2747 * also has all the FW routines
2748 */
2749
2750 /**
2751 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2752 * @adapter : controller's soft state
2753 * @raw_mbox : the mailbox
2754 *
2755 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2756 * controllers.
2757 */
2758 static int
2759 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2760 {
2761 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2762 mbox64_t *mbox64;
2763 mbox_t *mbox;
2764 uint8_t status;
2765 int i;
2766
2767
2768 mbox64 = raid_dev->mbox64;
2769 mbox = raid_dev->mbox;
2770
2771 /*
2772 * Wait until mailbox is free
2773 */
2774 if (megaraid_busywait_mbox(raid_dev) != 0)
2775 goto blocked_mailbox;
2776
2777 /*
2778 * Copy mailbox data into host structure
2779 */
2780 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2781 mbox->cmdid = 0xFE;
2782 mbox->busy = 1;
2783 mbox->poll = 0;
2784 mbox->ack = 0;
2785 mbox->numstatus = 0xFF;
2786 mbox->status = 0xFF;
2787
2788 wmb();
2789 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2790
2791 // wait for maximum 1 second for status to post. If the status is not
2792 // available within 1 second, assume FW is initializing and wait
2793 // for an extended amount of time
2794 if (mbox->numstatus == 0xFF) { // status not yet available
2795 udelay(25);
2796
2797 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2798 rmb();
2799 msleep(1);
2800 }
2801
2802
2803 if (i == 1000) {
2804 con_log(CL_ANN, (KERN_NOTICE
2805 "megaraid mailbox: wait for FW to boot "));
2806
2807 for (i = 0; (mbox->numstatus == 0xFF) &&
2808 (i < MBOX_RESET_WAIT); i++) {
2809 rmb();
2810 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2811 MBOX_RESET_WAIT - i));
2812 msleep(1000);
2813 }
2814
2815 if (i == MBOX_RESET_WAIT) {
2816
2817 con_log(CL_ANN, (
2818 "\nmegaraid mailbox: status not available\n"));
2819
2820 return -1;
2821 }
2822 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2823 }
2824 }
2825
2826 // wait for maximum 1 second for poll semaphore
2827 if (mbox->poll != 0x77) {
2828 udelay(25);
2829
2830 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2831 rmb();
2832 msleep(1);
2833 }
2834
2835 if (i == 1000) {
2836 con_log(CL_ANN, (KERN_WARNING
2837 "megaraid mailbox: could not get poll semaphore\n"));
2838 return -1;
2839 }
2840 }
2841
2842 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2843 wmb();
2844
2845 // wait for maximum 1 second for acknowledgement
2846 if (RDINDOOR(raid_dev) & 0x2) {
2847 udelay(25);
2848
2849 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2850 rmb();
2851 msleep(1);
2852 }
2853
2854 if (i == 1000) {
2855 con_log(CL_ANN, (KERN_WARNING
2856 "megaraid mailbox: could not acknowledge\n"));
2857 return -1;
2858 }
2859 }
2860 mbox->poll = 0;
2861 mbox->ack = 0x77;
2862
2863 status = mbox->status;
2864
2865 // invalidate the completed command id array. After command
2866 // completion, firmware would write the valid id.
2867 mbox->numstatus = 0xFF;
2868 mbox->status = 0xFF;
2869 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2870 mbox->completed[i] = 0xFF;
2871 }
2872
2873 return status;
2874
2875 blocked_mailbox:
2876
2877 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2878 return -1;
2879 }
2880
2881
2882 /**
2883 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2884 * @adapter : controller's soft state
2885 * @raw_mbox : the mailbox
2886 *
2887 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2888 * controllers. This is a faster version of the synchronous command and
2889 * therefore can be called in interrupt-context as well.
2890 */
2891 static int
2892 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2893 {
2894 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2895 mbox_t *mbox;
2896 long i;
2897
2898
2899 mbox = raid_dev->mbox;
2900
2901 // return immediately if the mailbox is busy
2902 if (mbox->busy) return -1;
2903
2904 // Copy mailbox data into host structure
2905 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2906 mbox->cmdid = 0xFE;
2907 mbox->busy = 1;
2908 mbox->poll = 0;
2909 mbox->ack = 0;
2910 mbox->numstatus = 0xFF;
2911 mbox->status = 0xFF;
2912
2913 wmb();
2914 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2915
2916 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
2917 if (mbox->numstatus != 0xFF) break;
2918 rmb();
2919 udelay(MBOX_SYNC_DELAY_200);
2920 }
2921
2922 if (i == MBOX_SYNC_WAIT_CNT) {
2923 // We may need to re-calibrate the counter
2924 con_log(CL_ANN, (KERN_CRIT
2925 "megaraid: fast sync command timed out\n"));
2926 }
2927
2928 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2929 wmb();
2930
2931 return mbox->status;
2932 }
2933
2934
2935 /**
2936 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
2937 * @raid_dev : RAID device (HBA) soft state
2938 *
2939 * Wait until the controller's mailbox is available to accept more commands.
2940 * Wait for at most 1 second.
2941 */
2942 static int
2943 megaraid_busywait_mbox(mraid_device_t *raid_dev)
2944 {
2945 mbox_t *mbox = raid_dev->mbox;
2946 int i = 0;
2947
2948 if (mbox->busy) {
2949 udelay(25);
2950 for (i = 0; mbox->busy && i < 1000; i++)
2951 msleep(1);
2952 }
2953
2954 if (i < 1000) return 0;
2955 else return -1;
2956 }
2957
2958
2959 /**
2960 * megaraid_mbox_product_info - some static information about the controller
2961 * @adapter : our soft state
2962 *
2963 * Issue commands to the controller to grab some parameters required by our
2964 * caller.
2965 */
2966 static int
2967 megaraid_mbox_product_info(adapter_t *adapter)
2968 {
2969 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2970 mbox_t *mbox;
2971 uint8_t raw_mbox[sizeof(mbox_t)];
2972 mraid_pinfo_t *pinfo;
2973 dma_addr_t pinfo_dma_h;
2974 mraid_inquiry3_t *mraid_inq3;
2975 int i;
2976
2977
2978 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2979 mbox = (mbox_t *)raw_mbox;
2980
2981 /*
2982 * Issue an ENQUIRY3 command to find out certain adapter parameters,
2983 * e.g., max channels, max commands etc.
2984 */
2985 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
2986 &pinfo_dma_h);
2987
2988 if (pinfo == NULL) {
2989 con_log(CL_ANN, (KERN_WARNING
2990 "megaraid: out of memory, %s %d\n", __func__,
2991 __LINE__));
2992
2993 return -1;
2994 }
2995 memset(pinfo, 0, sizeof(mraid_pinfo_t));
2996
2997 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
2998 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
2999
3000 raw_mbox[0] = FC_NEW_CONFIG;
3001 raw_mbox[2] = NC_SUBOP_ENQUIRY3;
3002 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
3003
3004 // Issue the command
3005 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3006
3007 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3008
3009 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3010 pinfo, pinfo_dma_h);
3011
3012 return -1;
3013 }
3014
3015 /*
3016 * Collect information about state of each physical drive
3017 * attached to the controller. We will expose all the disks
3018 * which are not part of RAID
3019 */
3020 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3021 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3022 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3023 }
3024
3025 /*
3026 * Get product info for information like number of channels,
3027 * maximum commands supported.
3028 */
3029 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3030 mbox->xferaddr = (uint32_t)pinfo_dma_h;
3031
3032 raw_mbox[0] = FC_NEW_CONFIG;
3033 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3034
3035 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3036
3037 con_log(CL_ANN, (KERN_WARNING
3038 "megaraid: product info failed\n"));
3039
3040 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3041 pinfo, pinfo_dma_h);
3042
3043 return -1;
3044 }
3045
3046 /*
3047 * Setup some parameters for host, as required by our caller
3048 */
3049 adapter->max_channel = pinfo->nchannels;
3050
3051 /*
3052 * we will export all the logical drives on a single channel.
3053 * Add 1 since inquires do not come for inititor ID
3054 */
3055 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1;
3056 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices
3057
3058 /*
3059 * These are the maximum outstanding commands for the scsi-layer
3060 */
3061 adapter->max_cmds = MBOX_MAX_SCSI_CMDS;
3062
3063 memset(adapter->fw_version, 0, VERSION_SIZE);
3064 memset(adapter->bios_version, 0, VERSION_SIZE);
3065
3066 memcpy(adapter->fw_version, pinfo->fw_version, 4);
3067 adapter->fw_version[4] = 0;
3068
3069 memcpy(adapter->bios_version, pinfo->bios_version, 4);
3070 adapter->bios_version[4] = 0;
3071
3072 con_log(CL_ANN, (KERN_NOTICE
3073 "megaraid: fw version:[%s] bios version:[%s]\n",
3074 adapter->fw_version, adapter->bios_version));
3075
3076 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3077 pinfo_dma_h);
3078
3079 return 0;
3080 }
3081
3082
3083
3084 /**
3085 * megaraid_mbox_extended_cdb - check for support for extended CDBs
3086 * @adapter : soft state for the controller
3087 *
3088 * This routine check whether the controller in question supports extended
3089 * ( > 10 bytes ) CDBs.
3090 */
3091 static int
3092 megaraid_mbox_extended_cdb(adapter_t *adapter)
3093 {
3094 mbox_t *mbox;
3095 uint8_t raw_mbox[sizeof(mbox_t)];
3096 int rval;
3097
3098 mbox = (mbox_t *)raw_mbox;
3099
3100 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3101 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3102
3103 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3104
3105 raw_mbox[0] = MAIN_MISC_OPCODE;
3106 raw_mbox[2] = SUPPORT_EXT_CDB;
3107
3108 /*
3109 * Issue the command
3110 */
3111 rval = 0;
3112 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3113 rval = -1;
3114 }
3115
3116 return rval;
3117 }
3118
3119
3120 /**
3121 * megaraid_mbox_support_ha - Do we support clustering
3122 * @adapter : soft state for the controller
3123 * @init_id : ID of the initiator
3124 *
3125 * Determine if the firmware supports clustering and the ID of the initiator.
3126 */
3127 static int
3128 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3129 {
3130 mbox_t *mbox;
3131 uint8_t raw_mbox[sizeof(mbox_t)];
3132 int rval;
3133
3134
3135 mbox = (mbox_t *)raw_mbox;
3136
3137 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3138
3139 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3140
3141 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3142
3143 raw_mbox[0] = GET_TARGET_ID;
3144
3145 // Issue the command
3146 *init_id = 7;
3147 rval = -1;
3148 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3149
3150 *init_id = *(uint8_t *)adapter->ibuf;
3151
3152 con_log(CL_ANN, (KERN_INFO
3153 "megaraid: cluster firmware, initiator ID: %d\n",
3154 *init_id));
3155
3156 rval = 0;
3157 }
3158
3159 return rval;
3160 }
3161
3162
3163 /**
3164 * megaraid_mbox_support_random_del - Do we support random deletion
3165 * @adapter : soft state for the controller
3166 *
3167 * Determine if the firmware supports random deletion.
3168 * Return: 1 is operation supported, 0 otherwise
3169 */
3170 static int
3171 megaraid_mbox_support_random_del(adapter_t *adapter)
3172 {
3173 mbox_t *mbox;
3174 uint8_t raw_mbox[sizeof(mbox_t)];
3175 int rval;
3176
3177 /*
3178 * Newer firmware on Dell CERC expect a different
3179 * random deletion handling, so disable it.
3180 */
3181 if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI &&
3182 adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 &&
3183 adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
3184 adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH &&
3185 (adapter->fw_version[0] > '6' ||
3186 (adapter->fw_version[0] == '6' &&
3187 adapter->fw_version[2] > '6') ||
3188 (adapter->fw_version[0] == '6'
3189 && adapter->fw_version[2] == '6'
3190 && adapter->fw_version[3] > '1'))) {
3191 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n"));
3192 return 0;
3193 }
3194
3195 mbox = (mbox_t *)raw_mbox;
3196
3197 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3198
3199 raw_mbox[0] = FC_DEL_LOGDRV;
3200 raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3201
3202 // Issue the command
3203 rval = 0;
3204 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3205
3206 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3207
3208 rval = 1;
3209 }
3210
3211 return rval;
3212 }
3213
3214
3215 /**
3216 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3217 * @adapter : soft state for the controller
3218 *
3219 * Find out the maximum number of scatter-gather elements supported by the
3220 * firmware.
3221 */
3222 static int
3223 megaraid_mbox_get_max_sg(adapter_t *adapter)
3224 {
3225 mbox_t *mbox;
3226 uint8_t raw_mbox[sizeof(mbox_t)];
3227 int nsg;
3228
3229
3230 mbox = (mbox_t *)raw_mbox;
3231
3232 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3233
3234 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3235
3236 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3237
3238 raw_mbox[0] = MAIN_MISC_OPCODE;
3239 raw_mbox[2] = GET_MAX_SG_SUPPORT;
3240
3241 // Issue the command
3242 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3243 nsg = *(uint8_t *)adapter->ibuf;
3244 }
3245 else {
3246 nsg = MBOX_DEFAULT_SG_SIZE;
3247 }
3248
3249 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3250
3251 return nsg;
3252 }
3253
3254
3255 /**
3256 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3257 * @adapter : soft state for the controller
3258 *
3259 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3260 * can be exported as regular SCSI channels.
3261 */
3262 static void
3263 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3264 {
3265 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3266 mbox_t *mbox;
3267 uint8_t raw_mbox[sizeof(mbox_t)];
3268
3269
3270 mbox = (mbox_t *)raw_mbox;
3271
3272 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3273
3274 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3275
3276 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3277
3278 raw_mbox[0] = CHNL_CLASS;
3279 raw_mbox[2] = GET_CHNL_CLASS;
3280
3281 // Issue the command. If the command fails, all channels are RAID
3282 // channels
3283 raid_dev->channel_class = 0xFF;
3284 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3285 raid_dev->channel_class = *(uint8_t *)adapter->ibuf;
3286 }
3287
3288 return;
3289 }
3290
3291
3292 /**
3293 * megaraid_mbox_flush_cache - flush adapter and disks cache
3294 * @adapter : soft state for the controller
3295 *
3296 * Flush adapter cache followed by disks cache.
3297 */
3298 static void
3299 megaraid_mbox_flush_cache(adapter_t *adapter)
3300 {
3301 mbox_t *mbox;
3302 uint8_t raw_mbox[sizeof(mbox_t)];
3303
3304
3305 mbox = (mbox_t *)raw_mbox;
3306
3307 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3308
3309 raw_mbox[0] = FLUSH_ADAPTER;
3310
3311 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3312 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3313 }
3314
3315 raw_mbox[0] = FLUSH_SYSTEM;
3316
3317 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3318 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3319 }
3320
3321 return;
3322 }
3323
3324
3325 /**
3326 * megaraid_mbox_fire_sync_cmd - fire the sync cmd
3327 * @adapter : soft state for the controller
3328 *
3329 * Clears the pending cmds in FW and reinits its RAID structs.
3330 */
3331 static int
3332 megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3333 {
3334 mbox_t *mbox;
3335 uint8_t raw_mbox[sizeof(mbox_t)];
3336 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3337 mbox64_t *mbox64;
3338 int status = 0;
3339 int i;
3340 uint32_t dword;
3341
3342 mbox = (mbox_t *)raw_mbox;
3343
3344 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3345
3346 raw_mbox[0] = 0xFF;
3347
3348 mbox64 = raid_dev->mbox64;
3349 mbox = raid_dev->mbox;
3350
3351 /* Wait until mailbox is free */
3352 if (megaraid_busywait_mbox(raid_dev) != 0) {
3353 status = 1;
3354 goto blocked_mailbox;
3355 }
3356
3357 /* Copy mailbox data into host structure */
3358 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3359 mbox->cmdid = 0xFE;
3360 mbox->busy = 1;
3361 mbox->poll = 0;
3362 mbox->ack = 0;
3363 mbox->numstatus = 0;
3364 mbox->status = 0;
3365
3366 wmb();
3367 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3368
3369 /* Wait for maximum 1 min for status to post.
3370 * If the Firmware SUPPORTS the ABOVE COMMAND,
3371 * mbox->cmd will be set to 0
3372 * else
3373 * the firmware will reject the command with
3374 * mbox->numstatus set to 1
3375 */
3376
3377 i = 0;
3378 status = 0;
3379 while (!mbox->numstatus && mbox->cmd == 0xFF) {
3380 rmb();
3381 msleep(1);
3382 i++;
3383 if (i > 1000 * 60) {
3384 status = 1;
3385 break;
3386 }
3387 }
3388 if (mbox->numstatus == 1)
3389 status = 1; /*cmd not supported*/
3390
3391 /* Check for interrupt line */
3392 dword = RDOUTDOOR(raid_dev);
3393 WROUTDOOR(raid_dev, dword);
3394 WRINDOOR(raid_dev,2);
3395
3396 return status;
3397
3398 blocked_mailbox:
3399 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3400 return status;
3401 }
3402
3403 /**
3404 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3405 * @adapter : controller's soft state
3406 * @scb : SCB to be displayed
3407 * @level : debug level for console print
3408 *
3409 * Diplay information about the given SCB iff the current debug level is
3410 * verbose.
3411 */
3412 static void
3413 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3414 {
3415 mbox_ccb_t *ccb;
3416 struct scsi_cmnd *scp;
3417 mbox_t *mbox;
3418 int level;
3419 int i;
3420
3421
3422 ccb = (mbox_ccb_t *)scb->ccb;
3423 scp = scb->scp;
3424 mbox = ccb->mbox;
3425
3426 level = CL_DLEVEL3;
3427
3428 con_log(level, (KERN_NOTICE
3429 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3430 mbox->cmd, scb->sno));
3431
3432 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3433 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3434 mbox->numsge));
3435
3436 if (!scp) return;
3437
3438 con_log(level, (KERN_NOTICE "scsi cmnd: "));
3439
3440 for (i = 0; i < scp->cmd_len; i++) {
3441 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3442 }
3443
3444 con_log(level, ("\n"));
3445
3446 return;
3447 }
3448
3449
3450 /**
3451 * megaraid_mbox_setup_device_map - manage device ids
3452 * @adapter : Driver's soft state
3453 *
3454 * Manange the device ids to have an appropraite mapping between the kernel
3455 * scsi addresses and megaraid scsi and logical drive addresses. We export
3456 * scsi devices on their actual addresses, whereas the logical drives are
3457 * exported on a virtual scsi channel.
3458 */
3459 static void
3460 megaraid_mbox_setup_device_map(adapter_t *adapter)
3461 {
3462 uint8_t c;
3463 uint8_t t;
3464
3465 /*
3466 * First fill the values on the logical drive channel
3467 */
3468 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3469 adapter->device_ids[adapter->max_channel][t] =
3470 (t < adapter->init_id) ? t : t - 1;
3471
3472 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3473
3474 /*
3475 * Fill the values on the physical devices channels
3476 */
3477 for (c = 0; c < adapter->max_channel; c++)
3478 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3479 adapter->device_ids[c][t] = (c << 8) | t;
3480 }
3481
3482
3483 /*
3484 * END: internal commands library
3485 */
3486
3487 /*
3488 * START: Interface for the common management module
3489 *
3490 * This is the module, which interfaces with the common management module to
3491 * provide support for ioctl and sysfs
3492 */
3493
3494 /**
3495 * megaraid_cmm_register - register with the management module
3496 * @adapter : HBA soft state
3497 *
3498 * Register with the management module, which allows applications to issue
3499 * ioctl calls to the drivers. This interface is used by the management module
3500 * to setup sysfs support as well.
3501 */
3502 static int
3503 megaraid_cmm_register(adapter_t *adapter)
3504 {
3505 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3506 mraid_mmadp_t adp;
3507 scb_t *scb;
3508 mbox_ccb_t *ccb;
3509 int rval;
3510 int i;
3511
3512 // Allocate memory for the base list of scb for management module.
3513 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL);
3514
3515 if (adapter->uscb_list == NULL) {
3516 con_log(CL_ANN, (KERN_WARNING
3517 "megaraid: out of memory, %s %d\n", __func__,
3518 __LINE__));
3519 return -1;
3520 }
3521
3522
3523 // Initialize the synchronization parameters for resources for
3524 // commands for management module
3525 INIT_LIST_HEAD(&adapter->uscb_pool);
3526
3527 spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3528
3529
3530
3531 // link all the packets. Note, CCB for commands, coming from the
3532 // commom management module, mailbox physical address are already
3533 // setup by it. We just need placeholder for that in our local command
3534 // control blocks
3535 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3536
3537 scb = adapter->uscb_list + i;
3538 ccb = raid_dev->uccb_list + i;
3539
3540 scb->ccb = (caddr_t)ccb;
3541 ccb->mbox64 = raid_dev->umbox64 + i;
3542 ccb->mbox = &ccb->mbox64->mbox32;
3543 ccb->raw_mbox = (uint8_t *)ccb->mbox;
3544
3545 scb->gp = 0;
3546
3547 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3548 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3549 scb->sno = i + MBOX_MAX_SCSI_CMDS;
3550
3551 scb->scp = NULL;
3552 scb->state = SCB_FREE;
3553 scb->dma_direction = PCI_DMA_NONE;
3554 scb->dma_type = MRAID_DMA_NONE;
3555 scb->dev_channel = -1;
3556 scb->dev_target = -1;
3557
3558 // put scb in the free pool
3559 list_add_tail(&scb->list, &adapter->uscb_pool);
3560 }
3561
3562 adp.unique_id = adapter->unique_id;
3563 adp.drvr_type = DRVRTYPE_MBOX;
3564 adp.drvr_data = (unsigned long)adapter;
3565 adp.pdev = adapter->pdev;
3566 adp.issue_uioc = megaraid_mbox_mm_handler;
3567 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
3568 adp.max_kioc = MBOX_MAX_USER_CMDS;
3569
3570 if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3571
3572 con_log(CL_ANN, (KERN_WARNING
3573 "megaraid mbox: did not register with CMM\n"));
3574
3575 kfree(adapter->uscb_list);
3576 }
3577
3578 return rval;
3579 }
3580
3581
3582 /**
3583 * megaraid_cmm_unregister - un-register with the management module
3584 * @adapter : HBA soft state
3585 *
3586 * Un-register with the management module.
3587 * FIXME: mgmt module must return failure for unregister if it has pending
3588 * commands in LLD.
3589 */
3590 static int
3591 megaraid_cmm_unregister(adapter_t *adapter)
3592 {
3593 kfree(adapter->uscb_list);
3594 mraid_mm_unregister_adp(adapter->unique_id);
3595 return 0;
3596 }
3597
3598
3599 /**
3600 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3601 * @drvr_data : LLD specific data
3602 * @kioc : CMM interface packet
3603 * @action : command action
3604 *
3605 * This routine is invoked whenever the Common Management Module (CMM) has a
3606 * command for us. The 'action' parameter specifies if this is a new command
3607 * or otherwise.
3608 */
3609 static int
3610 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3611 {
3612 adapter_t *adapter;
3613
3614 if (action != IOCTL_ISSUE) {
3615 con_log(CL_ANN, (KERN_WARNING
3616 "megaraid: unsupported management action:%#2x\n",
3617 action));
3618 return (-ENOTSUPP);
3619 }
3620
3621 adapter = (adapter_t *)drvr_data;
3622
3623 // make sure this adapter is not being detached right now.
3624 if (atomic_read(&adapter->being_detached)) {
3625 con_log(CL_ANN, (KERN_WARNING
3626 "megaraid: reject management request, detaching\n"));
3627 return (-ENODEV);
3628 }
3629
3630 switch (kioc->opcode) {
3631
3632 case GET_ADAP_INFO:
3633
3634 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *)
3635 (unsigned long)kioc->buf_vaddr);
3636
3637 kioc->done(kioc);
3638
3639 return kioc->status;
3640
3641 case MBOX_CMD:
3642
3643 return megaraid_mbox_mm_command(adapter, kioc);
3644
3645 default:
3646 kioc->status = (-EINVAL);
3647 kioc->done(kioc);
3648 return (-EINVAL);
3649 }
3650
3651 return 0; // not reached
3652 }
3653
3654 /**
3655 * megaraid_mbox_mm_command - issues commands routed through CMM
3656 * @adapter : HBA soft state
3657 * @kioc : management command packet
3658 *
3659 * Issues commands, which are routed through the management module.
3660 */
3661 static int
3662 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3663 {
3664 struct list_head *head = &adapter->uscb_pool;
3665 mbox64_t *mbox64;
3666 uint8_t *raw_mbox;
3667 scb_t *scb;
3668 mbox_ccb_t *ccb;
3669 unsigned long flags;
3670
3671 // detach one scb from free pool
3672 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3673
3674 if (list_empty(head)) { // should never happen because of CMM
3675
3676 con_log(CL_ANN, (KERN_WARNING
3677 "megaraid mbox: bug in cmm handler, lost resources\n"));
3678
3679 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3680
3681 return (-EINVAL);
3682 }
3683
3684 scb = list_entry(head->next, scb_t, list);
3685 list_del_init(&scb->list);
3686
3687 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3688
3689 scb->state = SCB_ACTIVE;
3690 scb->dma_type = MRAID_DMA_NONE;
3691 scb->dma_direction = PCI_DMA_NONE;
3692
3693 ccb = (mbox_ccb_t *)scb->ccb;
3694 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3695 raw_mbox = (uint8_t *)&mbox64->mbox32;
3696
3697 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3698
3699 scb->gp = (unsigned long)kioc;
3700
3701 /*
3702 * If it is a logdrv random delete operation, we have to wait till
3703 * there are no outstanding cmds at the fw and then issue it directly
3704 */
3705 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3706
3707 if (wait_till_fw_empty(adapter)) {
3708 con_log(CL_ANN, (KERN_NOTICE
3709 "megaraid mbox: LD delete, timed out\n"));
3710
3711 kioc->status = -ETIME;
3712
3713 scb->status = -1;
3714
3715 megaraid_mbox_mm_done(adapter, scb);
3716
3717 return (-ETIME);
3718 }
3719
3720 INIT_LIST_HEAD(&scb->list);
3721
3722 scb->state = SCB_ISSUED;
3723 if (mbox_post_cmd(adapter, scb) != 0) {
3724
3725 con_log(CL_ANN, (KERN_NOTICE
3726 "megaraid mbox: LD delete, mailbox busy\n"));
3727
3728 kioc->status = -EBUSY;
3729
3730 scb->status = -1;
3731
3732 megaraid_mbox_mm_done(adapter, scb);
3733
3734 return (-EBUSY);
3735 }
3736
3737 return 0;
3738 }
3739
3740 // put the command on the pending list and execute
3741 megaraid_mbox_runpendq(adapter, scb);
3742
3743 return 0;
3744 }
3745
3746
3747 static int
3748 wait_till_fw_empty(adapter_t *adapter)
3749 {
3750 unsigned long flags = 0;
3751 int i;
3752
3753
3754 /*
3755 * Set the quiescent flag to stop issuing cmds to FW.
3756 */
3757 spin_lock_irqsave(&adapter->lock, flags);
3758 adapter->quiescent++;
3759 spin_unlock_irqrestore(&adapter->lock, flags);
3760
3761 /*
3762 * Wait till there are no more cmds outstanding at FW. Try for at most
3763 * 60 seconds
3764 */
3765 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3766 con_log(CL_DLEVEL1, (KERN_INFO
3767 "megaraid: FW has %d pending commands\n",
3768 adapter->outstanding_cmds));
3769
3770 msleep(1000);
3771 }
3772
3773 return adapter->outstanding_cmds;
3774 }
3775
3776
3777 /**
3778 * megaraid_mbox_mm_done - callback for CMM commands
3779 * @adapter : HBA soft state
3780 * @scb : completed command
3781 *
3782 * Callback routine for internal commands originated from the management
3783 * module.
3784 */
3785 static void
3786 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3787 {
3788 uioc_t *kioc;
3789 mbox64_t *mbox64;
3790 uint8_t *raw_mbox;
3791 unsigned long flags;
3792
3793 kioc = (uioc_t *)scb->gp;
3794 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3795 mbox64->mbox32.status = scb->status;
3796 raw_mbox = (uint8_t *)&mbox64->mbox32;
3797
3798
3799 // put scb in the free pool
3800 scb->state = SCB_FREE;
3801 scb->scp = NULL;
3802
3803 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3804
3805 list_add(&scb->list, &adapter->uscb_pool);
3806
3807 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3808
3809 // if a delete logical drive operation succeeded, restart the
3810 // controller
3811 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3812
3813 adapter->quiescent--;
3814
3815 megaraid_mbox_runpendq(adapter, NULL);
3816 }
3817
3818 kioc->done(kioc);
3819
3820 return;
3821 }
3822
3823
3824 /**
3825 * gather_hbainfo - HBA characteristics for the applications
3826 * @adapter : HBA soft state
3827 * @hinfo : pointer to the caller's host info strucuture
3828 */
3829 static int
3830 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3831 {
3832 uint8_t dmajor;
3833
3834 dmajor = megaraid_mbox_version[0];
3835
3836 hinfo->pci_vendor_id = adapter->pdev->vendor;
3837 hinfo->pci_device_id = adapter->pdev->device;
3838 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3839 hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3840
3841 hinfo->pci_bus = adapter->pdev->bus->number;
3842 hinfo->pci_dev_fn = adapter->pdev->devfn;
3843 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn);
3844 hinfo->irq = adapter->host->irq;
3845 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport;
3846
3847 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3848 hinfo->host_no = adapter->host->host_no;
3849
3850 return 0;
3851 }
3852
3853 /*
3854 * END: Interface for the common management module
3855 */
3856
3857
3858
3859 /**
3860 * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3861 * @adapter : controller's soft state
3862 *
3863 * Allocate packets required to issue FW calls whenever the sysfs attributes
3864 * are read. These attributes would require up-to-date information from the
3865 * FW. Also set up resources for mutual exclusion to share these resources and
3866 * the wait queue.
3867 *
3868 * Return 0 on success.
3869 * Return -ERROR_CODE on failure.
3870 */
3871 static int
3872 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3873 {
3874 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3875 int rval = 0;
3876
3877 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3878
3879 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3880
3881 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3882 PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3883
3884 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3885 !raid_dev->sysfs_buffer) {
3886
3887 con_log(CL_ANN, (KERN_WARNING
3888 "megaraid: out of memory, %s %d\n", __func__,
3889 __LINE__));
3890
3891 rval = -ENOMEM;
3892
3893 megaraid_sysfs_free_resources(adapter);
3894 }
3895
3896 mutex_init(&raid_dev->sysfs_mtx);
3897
3898 init_waitqueue_head(&raid_dev->sysfs_wait_q);
3899
3900 return rval;
3901 }
3902
3903
3904 /**
3905 * megaraid_sysfs_free_resources - free sysfs related resources
3906 * @adapter : controller's soft state
3907 *
3908 * Free packets allocated for sysfs FW commands
3909 */
3910 static void
3911 megaraid_sysfs_free_resources(adapter_t *adapter)
3912 {
3913 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3914
3915 kfree(raid_dev->sysfs_uioc);
3916 kfree(raid_dev->sysfs_mbox64);
3917
3918 if (raid_dev->sysfs_buffer) {
3919 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3920 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3921 }
3922 }
3923
3924
3925 /**
3926 * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3927 * @uioc : completed packet
3928 *
3929 * Callback routine called in the ISR/tasklet context for get ldmap call
3930 */
3931 static void
3932 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3933 {
3934 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3935 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3936
3937 uioc->status = 0;
3938
3939 wake_up(&raid_dev->sysfs_wait_q);
3940 }
3941
3942
3943 /**
3944 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3945 * @data : timed out packet
3946 *
3947 * Timeout routine to recover and return to application, in case the adapter
3948 * has stopped responding. A timeout of 60 seconds for this command seems like
3949 * a good value.
3950 */
3951 static void
3952 megaraid_sysfs_get_ldmap_timeout(unsigned long data)
3953 {
3954 uioc_t *uioc = (uioc_t *)data;
3955 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3956 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3957
3958 uioc->status = -ETIME;
3959
3960 wake_up(&raid_dev->sysfs_wait_q);
3961 }
3962
3963
3964 /**
3965 * megaraid_sysfs_get_ldmap - get update logical drive map
3966 * @adapter : controller's soft state
3967 *
3968 * This routine will be called whenever user reads the logical drive
3969 * attributes, go get the current logical drive mapping table from the
3970 * firmware. We use the management API's to issue commands to the controller.
3971 *
3972 * NOTE: The commands issuance functionality is not generalized and
3973 * implemented in context of "get ld map" command only. If required, the
3974 * command issuance logical can be trivially pulled out and implemented as a
3975 * standalone libary. For now, this should suffice since there is no other
3976 * user of this interface.
3977 *
3978 * Return 0 on success.
3979 * Return -1 on failure.
3980 */
3981 static int
3982 megaraid_sysfs_get_ldmap(adapter_t *adapter)
3983 {
3984 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3985 uioc_t *uioc;
3986 mbox64_t *mbox64;
3987 mbox_t *mbox;
3988 char *raw_mbox;
3989 struct timer_list sysfs_timer;
3990 struct timer_list *timerp;
3991 caddr_t ldmap;
3992 int rval = 0;
3993
3994 /*
3995 * Allow only one read at a time to go through the sysfs attributes
3996 */
3997 mutex_lock(&raid_dev->sysfs_mtx);
3998
3999 uioc = raid_dev->sysfs_uioc;
4000 mbox64 = raid_dev->sysfs_mbox64;
4001 ldmap = raid_dev->sysfs_buffer;
4002
4003 memset(uioc, 0, sizeof(uioc_t));
4004 memset(mbox64, 0, sizeof(mbox64_t));
4005 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
4006
4007 mbox = &mbox64->mbox32;
4008 raw_mbox = (char *)mbox;
4009 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64;
4010 uioc->buf_vaddr = (caddr_t)adapter;
4011 uioc->status = -ENODATA;
4012 uioc->done = megaraid_sysfs_get_ldmap_done;
4013
4014 /*
4015 * Prepare the mailbox packet to get the current logical drive mapping
4016 * table
4017 */
4018 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
4019
4020 raw_mbox[0] = FC_DEL_LOGDRV;
4021 raw_mbox[2] = OP_GET_LDID_MAP;
4022
4023 /*
4024 * Setup a timer to recover from a non-responding controller
4025 */
4026 timerp = &sysfs_timer;
4027 init_timer(timerp);
4028
4029 timerp->function = megaraid_sysfs_get_ldmap_timeout;
4030 timerp->data = (unsigned long)uioc;
4031 timerp->expires = jiffies + 60 * HZ;
4032
4033 add_timer(timerp);
4034
4035 /*
4036 * Send the command to the firmware
4037 */
4038 rval = megaraid_mbox_mm_command(adapter, uioc);
4039
4040 if (rval == 0) { // command successfully issued
4041 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4042
4043 /*
4044 * Check if the command timed out
4045 */
4046 if (uioc->status == -ETIME) {
4047 con_log(CL_ANN, (KERN_NOTICE
4048 "megaraid: sysfs get ld map timed out\n"));
4049
4050 rval = -ETIME;
4051 }
4052 else {
4053 rval = mbox->status;
4054 }
4055
4056 if (rval == 0) {
4057 memcpy(raid_dev->curr_ldmap, ldmap,
4058 sizeof(raid_dev->curr_ldmap));
4059 }
4060 else {
4061 con_log(CL_ANN, (KERN_NOTICE
4062 "megaraid: get ld map failed with %x\n", rval));
4063 }
4064 }
4065 else {
4066 con_log(CL_ANN, (KERN_NOTICE
4067 "megaraid: could not issue ldmap command:%x\n", rval));
4068 }
4069
4070
4071 del_timer_sync(timerp);
4072
4073 mutex_unlock(&raid_dev->sysfs_mtx);
4074
4075 return rval;
4076 }
4077
4078
4079 /**
4080 * megaraid_sysfs_show_app_hndl - display application handle for this adapter
4081 * @cdev : class device object representation for the host
4082 * @buf : buffer to send data to
4083 *
4084 * Display the handle used by the applications while executing management
4085 * tasks on the adapter. We invoke a management module API to get the adapter
4086 * handle, since we do not interface with applications directly.
4087 */
4088 static ssize_t
4089 megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr,
4090 char *buf)
4091 {
4092 struct Scsi_Host *shost = class_to_shost(dev);
4093 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4094 uint32_t app_hndl;
4095
4096 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4097
4098 return snprintf(buf, 8, "%u\n", app_hndl);
4099 }
4100
4101
4102 /**
4103 * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4104 * @dev : device object representation for the scsi device
4105 * @attr : device attribute to show
4106 * @buf : buffer to send data to
4107 *
4108 * Display the logical drive number for the device in question, if it a valid
4109 * logical drive. For physical devices, "-1" is returned.
4110 *
4111 * The logical drive number is displayed in following format:
4112 *
4113 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4114 *
4115 * <int> <int> <int> <int>
4116 */
4117 static ssize_t
4118 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
4119 {
4120 struct scsi_device *sdev = to_scsi_device(dev);
4121 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4122 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4123 int scsi_id = -1;
4124 int logical_drv = -1;
4125 int ldid_map = -1;
4126 uint32_t app_hndl = 0;
4127 int mapped_sdev_id;
4128 int rval;
4129 int i;
4130
4131 if (raid_dev->random_del_supported &&
4132 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4133
4134 rval = megaraid_sysfs_get_ldmap(adapter);
4135 if (rval == 0) {
4136
4137 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4138
4139 mapped_sdev_id = sdev->id;
4140
4141 if (sdev->id > adapter->init_id) {
4142 mapped_sdev_id -= 1;
4143 }
4144
4145 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4146
4147 scsi_id = sdev->id;
4148
4149 logical_drv = i;
4150
4151 ldid_map = raid_dev->curr_ldmap[i];
4152
4153 app_hndl = mraid_mm_adapter_app_handle(
4154 adapter->unique_id);
4155
4156 break;
4157 }
4158 }
4159 }
4160 else {
4161 con_log(CL_ANN, (KERN_NOTICE
4162 "megaraid: sysfs get ld map failed: %x\n",
4163 rval));
4164 }
4165 }
4166
4167 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4168 ldid_map, app_hndl);
4169 }
4170
4171
4172 /*
4173 * END: Mailbox Low Level Driver
4174 */
4175 module_init(megaraid_init);
4176 module_exit(megaraid_exit);
4177
4178 /* vim: set ts=8 sw=8 tw=78 ai si: */
kernel source for telekom puls (alcatel/mediatek)