1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 *
4 * Linux MegaRAID device driver
5 *
6 * Copyright (c) 2003-2004 LSI Logic Corporation.
7 *
8 * FILE : megaraid_mbox.c
9 * Version : v2.20.5.1 (Nov 16 2006)
10 *
11 * Authors:
12 * Atul Mukker <Atul.Mukker@lsi.com>
13 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com>
14 * Manoj Jose <Manoj.Jose@lsi.com>
15 * Seokmann Ju
16 *
17 * List of supported controllers
18 *
19 * OEM Product Name VID DID SSVID SSID
20 * --- ------------ --- --- ---- ----
21 * Dell PERC3/QC 101E 1960 1028 0471
22 * Dell PERC3/DC 101E 1960 1028 0493
23 * Dell PERC3/SC 101E 1960 1028 0475
24 * Dell PERC3/Di 1028 1960 1028 0123
25 * Dell PERC4/SC 1000 1960 1028 0520
26 * Dell PERC4/DC 1000 1960 1028 0518
27 * Dell PERC4/QC 1000 0407 1028 0531
28 * Dell PERC4/Di 1028 000F 1028 014A
29 * Dell PERC 4e/Si 1028 0013 1028 016c
30 * Dell PERC 4e/Di 1028 0013 1028 016d
31 * Dell PERC 4e/Di 1028 0013 1028 016e
32 * Dell PERC 4e/Di 1028 0013 1028 016f
33 * Dell PERC 4e/Di 1028 0013 1028 0170
34 * Dell PERC 4e/DC 1000 0408 1028 0002
35 * Dell PERC 4e/SC 1000 0408 1028 0001
36 *
37 * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520
38 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520
39 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518
40 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530
41 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532
42 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531
43 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001
44 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002
45 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523
46 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523
47 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004
48 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008
49 *
50 * INTEL RAID Controller SRCU42X 1000 0407 8086 0532
51 * INTEL RAID Controller SRCS16 1000 1960 8086 0523
52 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002
53 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530
54 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008
55 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431
56 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499
57 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520
58 *
59 * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065
60 *
61 * ACER MegaRAID ROMB-2E 1000 0408 1025 004D
62 *
63 * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287
64 *
65 * For history of changes, see Documentation/scsi/ChangeLog.megaraid
66 */
67
68 #include <linux/slab.h>
69 #include <linux/module.h>
70 #include "megaraid_mbox.h"
71
72 static int megaraid_init(void);
73 static void megaraid_exit(void);
74
75 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
76 static void megaraid_detach_one(struct pci_dev *);
77 static void megaraid_mbox_shutdown(struct pci_dev *);
78
79 static int megaraid_io_attach(adapter_t *);
80 static void megaraid_io_detach(adapter_t *);
81
82 static int megaraid_init_mbox(adapter_t *);
83 static void megaraid_fini_mbox(adapter_t *);
84
85 static int megaraid_alloc_cmd_packets(adapter_t *);
86 static void megaraid_free_cmd_packets(adapter_t *);
87
88 static int megaraid_mbox_setup_dma_pools(adapter_t *);
89 static void megaraid_mbox_teardown_dma_pools(adapter_t *);
90
91 static int megaraid_sysfs_alloc_resources(adapter_t *);
92 static void megaraid_sysfs_free_resources(adapter_t *);
93
94 static int megaraid_abort_handler(struct scsi_cmnd *);
95 static int megaraid_reset_handler(struct scsi_cmnd *);
96
97 static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
98 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
99 static int megaraid_busywait_mbox(mraid_device_t *);
100 static int megaraid_mbox_product_info(adapter_t *);
101 static int megaraid_mbox_extended_cdb(adapter_t *);
102 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
103 static int megaraid_mbox_support_random_del(adapter_t *);
104 static int megaraid_mbox_get_max_sg(adapter_t *);
105 static void megaraid_mbox_enum_raid_scsi(adapter_t *);
106 static void megaraid_mbox_flush_cache(adapter_t *);
107 static int megaraid_mbox_fire_sync_cmd(adapter_t *);
108
109 static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
110 static void megaraid_mbox_setup_device_map(adapter_t *);
111
112 static int megaraid_queue_command(struct Scsi_Host *, struct scsi_cmnd *);
113 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
114 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
115 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
116 struct scsi_cmnd *);
117 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
118 struct scsi_cmnd *);
119
120 static irqreturn_t megaraid_isr(int, void *);
121
122 static void megaraid_mbox_dpc(unsigned long);
123
124 static ssize_t megaraid_mbox_app_hndl_show(struct device *, struct device_attribute *attr, char *);
125 static ssize_t megaraid_mbox_ld_show(struct device *, struct device_attribute *attr, char *);
126
127 static int megaraid_cmm_register(adapter_t *);
128 static int megaraid_cmm_unregister(adapter_t *);
129 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
130 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
131 static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
132 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
133 static int wait_till_fw_empty(adapter_t *);
134
135
136
137 MODULE_AUTHOR("megaraidlinux@lsi.com");
138 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
139 MODULE_LICENSE("GPL");
140 MODULE_VERSION(MEGARAID_VERSION);
141
142 /*
143 * ### modules parameters for driver ###
144 */
145
146 /*
147 * Set to enable driver to expose unconfigured disk to kernel
148 */
149 static int megaraid_expose_unconf_disks = 0;
150 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
151 MODULE_PARM_DESC(unconf_disks,
152 "Set to expose unconfigured disks to kernel (default=0)");
153
154 /*
155 * driver wait time if the adapter's mailbox is busy
156 */
157 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
158 module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
159 MODULE_PARM_DESC(busy_wait,
160 "Max wait for mailbox in microseconds if busy (default=10)");
161
162 /*
163 * number of sectors per IO command
164 */
165 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
166 module_param_named(max_sectors, megaraid_max_sectors, int, 0);
167 MODULE_PARM_DESC(max_sectors,
168 "Maximum number of sectors per IO command (default=128)");
169
170 /*
171 * number of commands per logical unit
172 */
173 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
174 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
175 MODULE_PARM_DESC(cmd_per_lun,
176 "Maximum number of commands per logical unit (default=64)");
177
178
179 /*
180 * Fast driver load option, skip scanning for physical devices during load.
181 * This would result in non-disk devices being skipped during driver load
182 * time. These can be later added though, using /proc/scsi/scsi
183 */
184 static unsigned int megaraid_fast_load;
185 module_param_named(fast_load, megaraid_fast_load, int, 0);
186 MODULE_PARM_DESC(fast_load,
187 "Faster loading of the driver, skips physical devices! (default=0)");
188
189
190 /*
191 * mraid_debug level - threshold for amount of information to be displayed by
192 * the driver. This level can be changed through modules parameters, ioctl or
193 * sysfs/proc interface. By default, print the announcement messages only.
194 */
195 int mraid_debug_level = CL_ANN;
196 module_param_named(debug_level, mraid_debug_level, int, 0);
197 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
198
199 /*
200 * PCI table for all supported controllers.
201 */
202 static struct pci_device_id pci_id_table_g[] = {
203 {
204 PCI_VENDOR_ID_DELL,
205 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
206 PCI_VENDOR_ID_DELL,
207 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
208 },
209 {
210 PCI_VENDOR_ID_LSI_LOGIC,
211 PCI_DEVICE_ID_PERC4_SC,
212 PCI_VENDOR_ID_DELL,
213 PCI_SUBSYS_ID_PERC4_SC,
214 },
215 {
216 PCI_VENDOR_ID_LSI_LOGIC,
217 PCI_DEVICE_ID_PERC4_DC,
218 PCI_VENDOR_ID_DELL,
219 PCI_SUBSYS_ID_PERC4_DC,
220 },
221 {
222 PCI_VENDOR_ID_LSI_LOGIC,
223 PCI_DEVICE_ID_VERDE,
224 PCI_ANY_ID,
225 PCI_ANY_ID,
226 },
227 {
228 PCI_VENDOR_ID_DELL,
229 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
230 PCI_VENDOR_ID_DELL,
231 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
232 },
233 {
234 PCI_VENDOR_ID_DELL,
235 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
236 PCI_VENDOR_ID_DELL,
237 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
238 },
239 {
240 PCI_VENDOR_ID_DELL,
241 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
242 PCI_VENDOR_ID_DELL,
243 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
244 },
245 {
246 PCI_VENDOR_ID_DELL,
247 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
248 PCI_VENDOR_ID_DELL,
249 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
250 },
251 {
252 PCI_VENDOR_ID_DELL,
253 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
254 PCI_VENDOR_ID_DELL,
255 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
256 },
257 {
258 PCI_VENDOR_ID_DELL,
259 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
260 PCI_VENDOR_ID_DELL,
261 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
262 },
263 {
264 PCI_VENDOR_ID_LSI_LOGIC,
265 PCI_DEVICE_ID_DOBSON,
266 PCI_ANY_ID,
267 PCI_ANY_ID,
268 },
269 {
270 PCI_VENDOR_ID_AMI,
271 PCI_DEVICE_ID_AMI_MEGARAID3,
272 PCI_ANY_ID,
273 PCI_ANY_ID,
274 },
275 {
276 PCI_VENDOR_ID_LSI_LOGIC,
277 PCI_DEVICE_ID_AMI_MEGARAID3,
278 PCI_ANY_ID,
279 PCI_ANY_ID,
280 },
281 {
282 PCI_VENDOR_ID_LSI_LOGIC,
283 PCI_DEVICE_ID_LINDSAY,
284 PCI_ANY_ID,
285 PCI_ANY_ID,
286 },
287 {0} /* Terminating entry */
288 };
289 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
290
291
292 static struct pci_driver megaraid_pci_driver = {
293 .name = "megaraid",
294 .id_table = pci_id_table_g,
295 .probe = megaraid_probe_one,
296 .remove = megaraid_detach_one,
297 .shutdown = megaraid_mbox_shutdown,
298 };
299
300
301
302 // definitions for the device attributes for exporting logical drive number
303 // for a scsi address (Host, Channel, Id, Lun)
304
305 static DEVICE_ATTR_ADMIN_RO(megaraid_mbox_app_hndl);
306
307 // Host template initializer for megaraid mbox sysfs device attributes
308 static struct attribute *megaraid_shost_attrs[] = {
309 &dev_attr_megaraid_mbox_app_hndl.attr,
310 NULL,
311 };
312
313 ATTRIBUTE_GROUPS(megaraid_shost);
314
315 static DEVICE_ATTR_ADMIN_RO(megaraid_mbox_ld);
316
317 // Host template initializer for megaraid mbox sysfs device attributes
318 static struct attribute *megaraid_sdev_attrs[] = {
319 &dev_attr_megaraid_mbox_ld.attr,
320 NULL,
321 };
322
323 ATTRIBUTE_GROUPS(megaraid_sdev);
324
325 /*
326 * Scsi host template for megaraid unified driver
327 */
328 static const struct scsi_host_template megaraid_template_g = {
329 .module = THIS_MODULE,
330 .name = "LSI Logic MegaRAID driver",
331 .proc_name = "megaraid",
332 .queuecommand = megaraid_queue_command,
333 .eh_abort_handler = megaraid_abort_handler,
334 .eh_host_reset_handler = megaraid_reset_handler,
335 .change_queue_depth = scsi_change_queue_depth,
336 .no_write_same = 1,
337 .sdev_groups = megaraid_sdev_groups,
338 .shost_groups = megaraid_shost_groups,
339 };
340
341
342 /**
343 * megaraid_init - module load hook
344 *
345 * We register ourselves as hotplug enabled module and let PCI subsystem
346 * discover our adapters.
347 */
348 static int __init
megaraid_init(void)349 megaraid_init(void)
350 {
351 int rval;
352
353 // Announce the driver version
354 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
355 MEGARAID_EXT_VERSION));
356
357 // check validity of module parameters
358 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
359
360 con_log(CL_ANN, (KERN_WARNING
361 "megaraid mailbox: max commands per lun reset to %d\n",
362 MBOX_MAX_SCSI_CMDS));
363
364 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
365 }
366
367
368 // register as a PCI hot-plug driver module
369 rval = pci_register_driver(&megaraid_pci_driver);
370 if (rval < 0) {
371 con_log(CL_ANN, (KERN_WARNING
372 "megaraid: could not register hotplug support.\n"));
373 }
374
375 return rval;
376 }
377
378
379 /**
380 * megaraid_exit - driver unload entry point
381 *
382 * We simply unwrap the megaraid_init routine here.
383 */
384 static void __exit
megaraid_exit(void)385 megaraid_exit(void)
386 {
387 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
388
389 // unregister as PCI hotplug driver
390 pci_unregister_driver(&megaraid_pci_driver);
391
392 return;
393 }
394
395
396 /**
397 * megaraid_probe_one - PCI hotplug entry point
398 * @pdev : handle to this controller's PCI configuration space
399 * @id : pci device id of the class of controllers
400 *
401 * This routine should be called whenever a new adapter is detected by the
402 * PCI hotplug susbsystem.
403 */
404 static int
megaraid_probe_one(struct pci_dev * pdev,const struct pci_device_id * id)405 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
406 {
407 adapter_t *adapter;
408
409
410 // detected a new controller
411 con_log(CL_ANN, (KERN_INFO
412 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
413 pdev->vendor, pdev->device, pdev->subsystem_vendor,
414 pdev->subsystem_device));
415
416 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
417 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
418
419 if (pci_enable_device(pdev)) {
420 con_log(CL_ANN, (KERN_WARNING
421 "megaraid: pci_enable_device failed\n"));
422
423 return -ENODEV;
424 }
425
426 // Enable bus-mastering on this controller
427 pci_set_master(pdev);
428
429 // Allocate the per driver initialization structure
430 adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL);
431
432 if (adapter == NULL) {
433 con_log(CL_ANN, (KERN_WARNING
434 "megaraid: out of memory, %s %d.\n", __func__, __LINE__));
435
436 goto out_probe_one;
437 }
438
439
440 // set up PCI related soft state and other pre-known parameters
441 adapter->unique_id = pci_dev_id(pdev);
442 adapter->irq = pdev->irq;
443 adapter->pdev = pdev;
444
445 atomic_set(&adapter->being_detached, 0);
446
447 // Setup the default DMA mask. This would be changed later on
448 // depending on hardware capabilities
449 if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(32))) {
450 con_log(CL_ANN, (KERN_WARNING
451 "megaraid: dma_set_mask failed:%d\n", __LINE__));
452
453 goto out_free_adapter;
454 }
455
456
457 // Initialize the synchronization lock for kernel and LLD
458 spin_lock_init(&adapter->lock);
459
460 // Initialize the command queues: the list of free SCBs and the list
461 // of pending SCBs.
462 INIT_LIST_HEAD(&adapter->kscb_pool);
463 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
464
465 INIT_LIST_HEAD(&adapter->pend_list);
466 spin_lock_init(PENDING_LIST_LOCK(adapter));
467
468 INIT_LIST_HEAD(&adapter->completed_list);
469 spin_lock_init(COMPLETED_LIST_LOCK(adapter));
470
471
472 // Start the mailbox based controller
473 if (megaraid_init_mbox(adapter) != 0) {
474 con_log(CL_ANN, (KERN_WARNING
475 "megaraid: mailbox adapter did not initialize\n"));
476
477 goto out_free_adapter;
478 }
479
480 // Register with LSI Common Management Module
481 if (megaraid_cmm_register(adapter) != 0) {
482
483 con_log(CL_ANN, (KERN_WARNING
484 "megaraid: could not register with management module\n"));
485
486 goto out_fini_mbox;
487 }
488
489 // setup adapter handle in PCI soft state
490 pci_set_drvdata(pdev, adapter);
491
492 // attach with scsi mid-layer
493 if (megaraid_io_attach(adapter) != 0) {
494
495 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
496
497 goto out_cmm_unreg;
498 }
499
500 return 0;
501
502 out_cmm_unreg:
503 megaraid_cmm_unregister(adapter);
504 out_fini_mbox:
505 megaraid_fini_mbox(adapter);
506 out_free_adapter:
507 kfree(adapter);
508 out_probe_one:
509 pci_disable_device(pdev);
510
511 return -ENODEV;
512 }
513
514
515 /**
516 * megaraid_detach_one - release framework resources and call LLD release routine
517 * @pdev : handle for our PCI configuration space
518 *
519 * This routine is called during driver unload. We free all the allocated
520 * resources and call the corresponding LLD so that it can also release all
521 * its resources.
522 *
523 * This routine is also called from the PCI hotplug system.
524 */
525 static void
megaraid_detach_one(struct pci_dev * pdev)526 megaraid_detach_one(struct pci_dev *pdev)
527 {
528 adapter_t *adapter;
529 struct Scsi_Host *host;
530
531
532 // Start a rollback on this adapter
533 adapter = pci_get_drvdata(pdev);
534
535 if (!adapter) {
536 con_log(CL_ANN, (KERN_CRIT
537 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
538 pdev->vendor, pdev->device, pdev->subsystem_vendor,
539 pdev->subsystem_device));
540
541 return;
542 }
543 else {
544 con_log(CL_ANN, (KERN_NOTICE
545 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
546 pdev->vendor, pdev->device, pdev->subsystem_vendor,
547 pdev->subsystem_device));
548 }
549
550
551 host = adapter->host;
552
553 // do not allow any more requests from the management module for this
554 // adapter.
555 // FIXME: How do we account for the request which might still be
556 // pending with us?
557 atomic_set(&adapter->being_detached, 1);
558
559 // detach from the IO sub-system
560 megaraid_io_detach(adapter);
561
562 // Unregister from common management module
563 //
564 // FIXME: this must return success or failure for conditions if there
565 // is a command pending with LLD or not.
566 megaraid_cmm_unregister(adapter);
567
568 // finalize the mailbox based controller and release all resources
569 megaraid_fini_mbox(adapter);
570
571 kfree(adapter);
572
573 scsi_host_put(host);
574
575 pci_disable_device(pdev);
576
577 return;
578 }
579
580
581 /**
582 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
583 * @pdev : generic driver model device
584 *
585 * Shutdown notification, perform flush cache.
586 */
587 static void
megaraid_mbox_shutdown(struct pci_dev * pdev)588 megaraid_mbox_shutdown(struct pci_dev *pdev)
589 {
590 adapter_t *adapter = pci_get_drvdata(pdev);
591 static int counter;
592
593 if (!adapter) {
594 con_log(CL_ANN, (KERN_WARNING
595 "megaraid: null device in shutdown\n"));
596 return;
597 }
598
599 // flush caches now
600 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
601 counter++));
602
603 megaraid_mbox_flush_cache(adapter);
604
605 con_log(CL_ANN, ("done\n"));
606 }
607
608
609 /**
610 * megaraid_io_attach - attach a device with the IO subsystem
611 * @adapter : controller's soft state
612 *
613 * Attach this device with the IO subsystem.
614 */
615 static int
megaraid_io_attach(adapter_t * adapter)616 megaraid_io_attach(adapter_t *adapter)
617 {
618 struct Scsi_Host *host;
619
620 // Initialize SCSI Host structure
621 host = scsi_host_alloc(&megaraid_template_g, 8);
622 if (!host) {
623 con_log(CL_ANN, (KERN_WARNING
624 "megaraid mbox: scsi_register failed\n"));
625
626 return -1;
627 }
628
629 SCSIHOST2ADAP(host) = (caddr_t)adapter;
630 adapter->host = host;
631
632 host->irq = adapter->irq;
633 host->unique_id = adapter->unique_id;
634 host->can_queue = adapter->max_cmds;
635 host->this_id = adapter->init_id;
636 host->sg_tablesize = adapter->sglen;
637 host->max_sectors = adapter->max_sectors;
638 host->cmd_per_lun = adapter->cmd_per_lun;
639 host->max_channel = adapter->max_channel;
640 host->max_id = adapter->max_target;
641 host->max_lun = adapter->max_lun;
642
643
644 // notify mid-layer about the new controller
645 if (scsi_add_host(host, &adapter->pdev->dev)) {
646
647 con_log(CL_ANN, (KERN_WARNING
648 "megaraid mbox: scsi_add_host failed\n"));
649
650 scsi_host_put(host);
651
652 return -1;
653 }
654
655 scsi_scan_host(host);
656
657 return 0;
658 }
659
660
661 /**
662 * megaraid_io_detach - detach a device from the IO subsystem
663 * @adapter : controller's soft state
664 *
665 * Detach this device from the IO subsystem.
666 */
667 static void
megaraid_io_detach(adapter_t * adapter)668 megaraid_io_detach(adapter_t *adapter)
669 {
670 struct Scsi_Host *host;
671
672 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
673
674 host = adapter->host;
675
676 scsi_remove_host(host);
677
678 return;
679 }
680
681
682 /*
683 * START: Mailbox Low Level Driver
684 *
685 * This is section specific to the single mailbox based controllers
686 */
687
688 /**
689 * megaraid_init_mbox - initialize controller
690 * @adapter : our soft state
691 *
692 * - Allocate 16-byte aligned mailbox memory for firmware handshake
693 * - Allocate controller's memory resources
694 * - Find out all initialization data
695 * - Allocate memory required for all the commands
696 * - Use internal library of FW routines, build up complete soft state
697 */
698 static int
megaraid_init_mbox(adapter_t * adapter)699 megaraid_init_mbox(adapter_t *adapter)
700 {
701 struct pci_dev *pdev;
702 mraid_device_t *raid_dev;
703 int i;
704 uint32_t magic64;
705
706
707 adapter->ito = MBOX_TIMEOUT;
708 pdev = adapter->pdev;
709
710 /*
711 * Allocate and initialize the init data structure for mailbox
712 * controllers
713 */
714 raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL);
715 if (raid_dev == NULL) return -1;
716
717
718 /*
719 * Attach the adapter soft state to raid device soft state
720 */
721 adapter->raid_device = (caddr_t)raid_dev;
722 raid_dev->fast_load = megaraid_fast_load;
723
724
725 // our baseport
726 raid_dev->baseport = pci_resource_start(pdev, 0);
727
728 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
729
730 con_log(CL_ANN, (KERN_WARNING
731 "megaraid: mem region busy\n"));
732
733 goto out_free_raid_dev;
734 }
735
736 raid_dev->baseaddr = ioremap(raid_dev->baseport, 128);
737
738 if (!raid_dev->baseaddr) {
739
740 con_log(CL_ANN, (KERN_WARNING
741 "megaraid: could not map hba memory\n") );
742
743 goto out_release_regions;
744 }
745
746 /* initialize the mutual exclusion lock for the mailbox */
747 spin_lock_init(&raid_dev->mailbox_lock);
748
749 /* allocate memory required for commands */
750 if (megaraid_alloc_cmd_packets(adapter) != 0)
751 goto out_iounmap;
752
753 /*
754 * Issue SYNC cmd to flush the pending cmds in the adapter
755 * and initialize its internal state
756 */
757
758 if (megaraid_mbox_fire_sync_cmd(adapter))
759 con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
760
761 /*
762 * Setup the rest of the soft state using the library of
763 * FW routines
764 */
765
766 /* request IRQ and register the interrupt service routine */
767 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
768 adapter)) {
769
770 con_log(CL_ANN, (KERN_WARNING
771 "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
772 goto out_alloc_cmds;
773
774 }
775
776 // Product info
777 if (megaraid_mbox_product_info(adapter) != 0)
778 goto out_free_irq;
779
780 // Do we support extended CDBs
781 adapter->max_cdb_sz = 10;
782 if (megaraid_mbox_extended_cdb(adapter) == 0) {
783 adapter->max_cdb_sz = 16;
784 }
785
786 /*
787 * Do we support cluster environment, if we do, what is the initiator
788 * id.
789 * NOTE: In a non-cluster aware firmware environment, the LLD should
790 * return 7 as initiator id.
791 */
792 adapter->ha = 0;
793 adapter->init_id = -1;
794 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
795 adapter->ha = 1;
796 }
797
798 /*
799 * Prepare the device ids array to have the mapping between the kernel
800 * device address and megaraid device address.
801 * We export the physical devices on their actual addresses. The
802 * logical drives are exported on a virtual SCSI channel
803 */
804 megaraid_mbox_setup_device_map(adapter);
805
806 // If the firmware supports random deletion, update the device id map
807 if (megaraid_mbox_support_random_del(adapter)) {
808
809 // Change the logical drives numbers in device_ids array one
810 // slot in device_ids is reserved for target id, that's why
811 // "<=" below
812 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
813 adapter->device_ids[adapter->max_channel][i] += 0x80;
814 }
815 adapter->device_ids[adapter->max_channel][adapter->init_id] =
816 0xFF;
817
818 raid_dev->random_del_supported = 1;
819 }
820
821 /*
822 * find out the maximum number of scatter-gather elements supported by
823 * this firmware
824 */
825 adapter->sglen = megaraid_mbox_get_max_sg(adapter);
826
827 // enumerate RAID and SCSI channels so that all devices on SCSI
828 // channels can later be exported, including disk devices
829 megaraid_mbox_enum_raid_scsi(adapter);
830
831 /*
832 * Other parameters required by upper layer
833 *
834 * maximum number of sectors per IO command
835 */
836 adapter->max_sectors = megaraid_max_sectors;
837
838 /*
839 * number of queued commands per LUN.
840 */
841 adapter->cmd_per_lun = megaraid_cmd_per_lun;
842
843 /*
844 * Allocate resources required to issue FW calls, when sysfs is
845 * accessed
846 */
847 if (megaraid_sysfs_alloc_resources(adapter) != 0)
848 goto out_free_irq;
849
850 // Set the DMA mask to 64-bit. All supported controllers as capable of
851 // DMA in this range
852 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
853
854 if (((magic64 == HBA_SIGNATURE_64_BIT) &&
855 ((adapter->pdev->subsystem_device !=
856 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
857 (adapter->pdev->subsystem_device !=
858 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
859 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
860 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
861 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
862 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
863 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
864 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
865 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
866 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
867 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
868 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
869 if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(64))) {
870 con_log(CL_ANN, (KERN_WARNING
871 "megaraid: DMA mask for 64-bit failed\n"));
872
873 if (dma_set_mask(&adapter->pdev->dev,
874 DMA_BIT_MASK(32))) {
875 con_log(CL_ANN, (KERN_WARNING
876 "megaraid: 32-bit DMA mask failed\n"));
877 goto out_free_sysfs_res;
878 }
879 }
880 }
881
882 // setup tasklet for DPC
883 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
884 (unsigned long)adapter);
885
886 con_log(CL_DLEVEL1, (KERN_INFO
887 "megaraid mbox hba successfully initialized\n"));
888
889 return 0;
890
891 out_free_sysfs_res:
892 megaraid_sysfs_free_resources(adapter);
893 out_free_irq:
894 free_irq(adapter->irq, adapter);
895 out_alloc_cmds:
896 megaraid_free_cmd_packets(adapter);
897 out_iounmap:
898 iounmap(raid_dev->baseaddr);
899 out_release_regions:
900 pci_release_regions(pdev);
901 out_free_raid_dev:
902 kfree(raid_dev);
903
904 return -1;
905 }
906
907
908 /**
909 * megaraid_fini_mbox - undo controller initialization
910 * @adapter : our soft state
911 */
912 static void
megaraid_fini_mbox(adapter_t * adapter)913 megaraid_fini_mbox(adapter_t *adapter)
914 {
915 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
916
917 // flush all caches
918 megaraid_mbox_flush_cache(adapter);
919
920 tasklet_kill(&adapter->dpc_h);
921
922 megaraid_sysfs_free_resources(adapter);
923
924 megaraid_free_cmd_packets(adapter);
925
926 free_irq(adapter->irq, adapter);
927
928 iounmap(raid_dev->baseaddr);
929
930 pci_release_regions(adapter->pdev);
931
932 kfree(raid_dev);
933
934 return;
935 }
936
937
938 /**
939 * megaraid_alloc_cmd_packets - allocate shared mailbox
940 * @adapter : soft state of the raid controller
941 *
942 * Allocate and align the shared mailbox. This mailbox is used to issue
943 * all the commands. For IO based controllers, the mailbox is also registered
944 * with the FW. Allocate memory for all commands as well.
945 * This is our big allocator.
946 */
947 static int
megaraid_alloc_cmd_packets(adapter_t * adapter)948 megaraid_alloc_cmd_packets(adapter_t *adapter)
949 {
950 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
951 struct pci_dev *pdev;
952 unsigned long align;
953 scb_t *scb;
954 mbox_ccb_t *ccb;
955 struct mraid_pci_blk *epthru_pci_blk;
956 struct mraid_pci_blk *sg_pci_blk;
957 struct mraid_pci_blk *mbox_pci_blk;
958 int i;
959
960 pdev = adapter->pdev;
961
962 /*
963 * Setup the mailbox
964 * Allocate the common 16-byte aligned memory for the handshake
965 * mailbox.
966 */
967 raid_dev->una_mbox64 = dma_alloc_coherent(&adapter->pdev->dev,
968 sizeof(mbox64_t),
969 &raid_dev->una_mbox64_dma,
970 GFP_KERNEL);
971
972 if (!raid_dev->una_mbox64) {
973 con_log(CL_ANN, (KERN_WARNING
974 "megaraid: out of memory, %s %d\n", __func__,
975 __LINE__));
976 return -1;
977 }
978
979 /*
980 * Align the mailbox at 16-byte boundary
981 */
982 raid_dev->mbox = &raid_dev->una_mbox64->mbox32;
983
984 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
985 (~0UL ^ 0xFUL));
986
987 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
988
989 align = ((void *)raid_dev->mbox -
990 ((void *)&raid_dev->una_mbox64->mbox32));
991
992 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
993 align;
994
995 // Allocate memory for commands issued internally
996 adapter->ibuf = dma_alloc_coherent(&pdev->dev, MBOX_IBUF_SIZE,
997 &adapter->ibuf_dma_h, GFP_KERNEL);
998 if (!adapter->ibuf) {
999
1000 con_log(CL_ANN, (KERN_WARNING
1001 "megaraid: out of memory, %s %d\n", __func__,
1002 __LINE__));
1003
1004 goto out_free_common_mbox;
1005 }
1006
1007 // Allocate memory for our SCSI Command Blocks and their associated
1008 // memory
1009
1010 /*
1011 * Allocate memory for the base list of scb. Later allocate memory for
1012 * CCBs and embedded components of each CCB and point the pointers in
1013 * scb to the allocated components
1014 * NOTE: The code to allocate SCB will be duplicated in all the LLD
1015 * since the calling routine does not yet know the number of available
1016 * commands.
1017 */
1018 adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL);
1019
1020 if (adapter->kscb_list == NULL) {
1021 con_log(CL_ANN, (KERN_WARNING
1022 "megaraid: out of memory, %s %d\n", __func__,
1023 __LINE__));
1024 goto out_free_ibuf;
1025 }
1026
1027 // memory allocation for our command packets
1028 if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1029 con_log(CL_ANN, (KERN_WARNING
1030 "megaraid: out of memory, %s %d\n", __func__,
1031 __LINE__));
1032 goto out_free_scb_list;
1033 }
1034
1035 // Adjust the scb pointers and link in the free pool
1036 epthru_pci_blk = raid_dev->epthru_pool;
1037 sg_pci_blk = raid_dev->sg_pool;
1038 mbox_pci_blk = raid_dev->mbox_pool;
1039
1040 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1041 scb = adapter->kscb_list + i;
1042 ccb = raid_dev->ccb_list + i;
1043
1044 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1045 ccb->raw_mbox = (uint8_t *)ccb->mbox;
1046 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1047 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1048
1049 // make sure the mailbox is aligned properly
1050 if (ccb->mbox_dma_h & 0x0F) {
1051 con_log(CL_ANN, (KERN_CRIT
1052 "megaraid mbox: not aligned on 16-bytes\n"));
1053
1054 goto out_teardown_dma_pools;
1055 }
1056
1057 ccb->epthru = (mraid_epassthru_t *)
1058 epthru_pci_blk[i].vaddr;
1059 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr;
1060 ccb->pthru = (mraid_passthru_t *)ccb->epthru;
1061 ccb->pthru_dma_h = ccb->epthru_dma_h;
1062
1063
1064 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1065 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr;
1066 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64;
1067
1068 scb->ccb = (caddr_t)ccb;
1069 scb->gp = 0;
1070
1071 scb->sno = i; // command index
1072
1073 scb->scp = NULL;
1074 scb->state = SCB_FREE;
1075 scb->dma_direction = DMA_NONE;
1076 scb->dma_type = MRAID_DMA_NONE;
1077 scb->dev_channel = -1;
1078 scb->dev_target = -1;
1079
1080 // put scb in the free pool
1081 list_add_tail(&scb->list, &adapter->kscb_pool);
1082 }
1083
1084 return 0;
1085
1086 out_teardown_dma_pools:
1087 megaraid_mbox_teardown_dma_pools(adapter);
1088 out_free_scb_list:
1089 kfree(adapter->kscb_list);
1090 out_free_ibuf:
1091 dma_free_coherent(&pdev->dev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1092 adapter->ibuf_dma_h);
1093 out_free_common_mbox:
1094 dma_free_coherent(&adapter->pdev->dev, sizeof(mbox64_t),
1095 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1096
1097 return -1;
1098 }
1099
1100
1101 /**
1102 * megaraid_free_cmd_packets - free memory
1103 * @adapter : soft state of the raid controller
1104 *
1105 * Release memory resources allocated for commands.
1106 */
1107 static void
megaraid_free_cmd_packets(adapter_t * adapter)1108 megaraid_free_cmd_packets(adapter_t *adapter)
1109 {
1110 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1111
1112 megaraid_mbox_teardown_dma_pools(adapter);
1113
1114 kfree(adapter->kscb_list);
1115
1116 dma_free_coherent(&adapter->pdev->dev, MBOX_IBUF_SIZE,
1117 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1118
1119 dma_free_coherent(&adapter->pdev->dev, sizeof(mbox64_t),
1120 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1121 return;
1122 }
1123
1124
1125 /**
1126 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1127 * @adapter : HBA soft state
1128 *
1129 * Setup the dma pools for mailbox, passthru and extended passthru structures,
1130 * and scatter-gather lists.
1131 */
1132 static int
megaraid_mbox_setup_dma_pools(adapter_t * adapter)1133 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1134 {
1135 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1136 struct mraid_pci_blk *epthru_pci_blk;
1137 struct mraid_pci_blk *sg_pci_blk;
1138 struct mraid_pci_blk *mbox_pci_blk;
1139 int i;
1140
1141
1142
1143 // Allocate memory for 16-bytes aligned mailboxes
1144 raid_dev->mbox_pool_handle = dma_pool_create("megaraid mbox pool",
1145 &adapter->pdev->dev,
1146 sizeof(mbox64_t) + 16,
1147 16, 0);
1148
1149 if (raid_dev->mbox_pool_handle == NULL) {
1150 goto fail_setup_dma_pool;
1151 }
1152
1153 mbox_pci_blk = raid_dev->mbox_pool;
1154 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1155 mbox_pci_blk[i].vaddr = dma_pool_alloc(
1156 raid_dev->mbox_pool_handle,
1157 GFP_KERNEL,
1158 &mbox_pci_blk[i].dma_addr);
1159 if (!mbox_pci_blk[i].vaddr) {
1160 goto fail_setup_dma_pool;
1161 }
1162 }
1163
1164 /*
1165 * Allocate memory for each embedded passthru strucuture pointer
1166 * Request for a 128 bytes aligned structure for each passthru command
1167 * structure
1168 * Since passthru and extended passthru commands are exclusive, they
1169 * share common memory pool. Passthru structures piggyback on memory
1170 * allocated to extended passthru since passthru is smaller of the two
1171 */
1172 raid_dev->epthru_pool_handle = dma_pool_create("megaraid mbox pthru",
1173 &adapter->pdev->dev, sizeof(mraid_epassthru_t), 128, 0);
1174
1175 if (raid_dev->epthru_pool_handle == NULL) {
1176 goto fail_setup_dma_pool;
1177 }
1178
1179 epthru_pci_blk = raid_dev->epthru_pool;
1180 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1181 epthru_pci_blk[i].vaddr = dma_pool_alloc(
1182 raid_dev->epthru_pool_handle,
1183 GFP_KERNEL,
1184 &epthru_pci_blk[i].dma_addr);
1185 if (!epthru_pci_blk[i].vaddr) {
1186 goto fail_setup_dma_pool;
1187 }
1188 }
1189
1190
1191 // Allocate memory for each scatter-gather list. Request for 512 bytes
1192 // alignment for each sg list
1193 raid_dev->sg_pool_handle = dma_pool_create("megaraid mbox sg",
1194 &adapter->pdev->dev,
1195 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1196 512, 0);
1197
1198 if (raid_dev->sg_pool_handle == NULL) {
1199 goto fail_setup_dma_pool;
1200 }
1201
1202 sg_pci_blk = raid_dev->sg_pool;
1203 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1204 sg_pci_blk[i].vaddr = dma_pool_alloc(
1205 raid_dev->sg_pool_handle,
1206 GFP_KERNEL,
1207 &sg_pci_blk[i].dma_addr);
1208 if (!sg_pci_blk[i].vaddr) {
1209 goto fail_setup_dma_pool;
1210 }
1211 }
1212
1213 return 0;
1214
1215 fail_setup_dma_pool:
1216 megaraid_mbox_teardown_dma_pools(adapter);
1217 return -1;
1218 }
1219
1220
1221 /**
1222 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1223 * @adapter : HBA soft state
1224 *
1225 * Teardown the dma pool for mailbox, passthru and extended passthru
1226 * structures, and scatter-gather lists.
1227 */
1228 static void
megaraid_mbox_teardown_dma_pools(adapter_t * adapter)1229 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1230 {
1231 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1232 struct mraid_pci_blk *epthru_pci_blk;
1233 struct mraid_pci_blk *sg_pci_blk;
1234 struct mraid_pci_blk *mbox_pci_blk;
1235 int i;
1236
1237
1238 sg_pci_blk = raid_dev->sg_pool;
1239 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1240 dma_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1241 sg_pci_blk[i].dma_addr);
1242 }
1243 dma_pool_destroy(raid_dev->sg_pool_handle);
1244
1245
1246 epthru_pci_blk = raid_dev->epthru_pool;
1247 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1248 dma_pool_free(raid_dev->epthru_pool_handle,
1249 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1250 }
1251 dma_pool_destroy(raid_dev->epthru_pool_handle);
1252
1253
1254 mbox_pci_blk = raid_dev->mbox_pool;
1255 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1256 dma_pool_free(raid_dev->mbox_pool_handle,
1257 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1258 }
1259 dma_pool_destroy(raid_dev->mbox_pool_handle);
1260
1261 return;
1262 }
1263
1264
1265 /**
1266 * megaraid_alloc_scb - detach and return a scb from the free list
1267 * @adapter : controller's soft state
1268 * @scp : pointer to the scsi command to be executed
1269 *
1270 * Return the scb from the head of the free list. %NULL if there are none
1271 * available.
1272 */
1273 static scb_t *
megaraid_alloc_scb(adapter_t * adapter,struct scsi_cmnd * scp)1274 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1275 {
1276 struct list_head *head = &adapter->kscb_pool;
1277 scb_t *scb = NULL;
1278 unsigned long flags;
1279
1280 // detach scb from free pool
1281 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1282
1283 if (list_empty(head)) {
1284 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1285 return NULL;
1286 }
1287
1288 scb = list_entry(head->next, scb_t, list);
1289 list_del_init(&scb->list);
1290
1291 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1292
1293 scb->state = SCB_ACTIVE;
1294 scb->scp = scp;
1295 scb->dma_type = MRAID_DMA_NONE;
1296
1297 return scb;
1298 }
1299
1300
1301 /**
1302 * megaraid_dealloc_scb - return the scb to the free pool
1303 * @adapter : controller's soft state
1304 * @scb : scb to be freed
1305 *
1306 * Return the scb back to the free list of scbs. The caller must 'flush' the
1307 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1308 * NOTE NOTE: Make sure the scb is not on any list before calling this
1309 * routine.
1310 */
1311 static inline void
megaraid_dealloc_scb(adapter_t * adapter,scb_t * scb)1312 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1313 {
1314 unsigned long flags;
1315
1316 // put scb in the free pool
1317 scb->state = SCB_FREE;
1318 scb->scp = NULL;
1319 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1320
1321 list_add(&scb->list, &adapter->kscb_pool);
1322
1323 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1324
1325 return;
1326 }
1327
1328
1329 /**
1330 * megaraid_mbox_mksgl - make the scatter-gather list
1331 * @adapter : controller's soft state
1332 * @scb : scsi control block
1333 *
1334 * Prepare the scatter-gather list.
1335 */
1336 static int
megaraid_mbox_mksgl(adapter_t * adapter,scb_t * scb)1337 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1338 {
1339 struct scatterlist *sgl;
1340 mbox_ccb_t *ccb;
1341 struct scsi_cmnd *scp;
1342 int sgcnt;
1343 int i;
1344
1345
1346 scp = scb->scp;
1347 ccb = (mbox_ccb_t *)scb->ccb;
1348
1349 sgcnt = scsi_dma_map(scp);
1350 BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen);
1351
1352 // no mapping required if no data to be transferred
1353 if (!sgcnt)
1354 return 0;
1355
1356 scb->dma_type = MRAID_DMA_WSG;
1357
1358 scsi_for_each_sg(scp, sgl, sgcnt, i) {
1359 ccb->sgl64[i].address = sg_dma_address(sgl);
1360 ccb->sgl64[i].length = sg_dma_len(sgl);
1361 }
1362
1363 // Return count of SG nodes
1364 return sgcnt;
1365 }
1366
1367
1368 /**
1369 * mbox_post_cmd - issue a mailbox command
1370 * @adapter : controller's soft state
1371 * @scb : command to be issued
1372 *
1373 * Post the command to the controller if mailbox is available.
1374 */
1375 static int
mbox_post_cmd(adapter_t * adapter,scb_t * scb)1376 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1377 {
1378 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1379 mbox64_t *mbox64;
1380 mbox_t *mbox;
1381 mbox_ccb_t *ccb;
1382 unsigned long flags;
1383 unsigned int i = 0;
1384
1385
1386 ccb = (mbox_ccb_t *)scb->ccb;
1387 mbox = raid_dev->mbox;
1388 mbox64 = raid_dev->mbox64;
1389
1390 /*
1391 * Check for busy mailbox. If it is, return failure - the caller
1392 * should retry later.
1393 */
1394 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1395
1396 if (unlikely(mbox->busy)) {
1397 do {
1398 udelay(1);
1399 i++;
1400 rmb();
1401 } while(mbox->busy && (i < max_mbox_busy_wait));
1402
1403 if (mbox->busy) {
1404
1405 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1406
1407 return -1;
1408 }
1409 }
1410
1411
1412 // Copy this command's mailbox data into "adapter's" mailbox
1413 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1414 mbox->cmdid = scb->sno;
1415
1416 adapter->outstanding_cmds++;
1417
1418 mbox->busy = 1; // Set busy
1419 mbox->poll = 0;
1420 mbox->ack = 0;
1421 wmb();
1422
1423 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1424
1425 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1426
1427 return 0;
1428 }
1429
1430
1431 /**
1432 * megaraid_queue_command_lck - generic queue entry point for all LLDs
1433 * @scp : pointer to the scsi command to be executed
1434 *
1435 * Queue entry point for mailbox based controllers.
1436 */
megaraid_queue_command_lck(struct scsi_cmnd * scp)1437 static int megaraid_queue_command_lck(struct scsi_cmnd *scp)
1438 {
1439 void (*done)(struct scsi_cmnd *) = scsi_done;
1440 adapter_t *adapter;
1441 scb_t *scb;
1442 int if_busy;
1443
1444 adapter = SCP2ADAPTER(scp);
1445 scp->result = 0;
1446
1447 /*
1448 * Allocate and build a SCB request
1449 * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1450 * not allocate scb. We will return non-zero status in that case.
1451 * NOTE: scb can be null even though certain commands completed
1452 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1453 * return 0 in that case, and we would do the callback right away.
1454 */
1455 if_busy = 0;
1456 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1457 if (!scb) { // command already completed
1458 done(scp);
1459 return 0;
1460 }
1461
1462 megaraid_mbox_runpendq(adapter, scb);
1463 return if_busy;
1464 }
1465
DEF_SCSI_QCMD(megaraid_queue_command)1466 static DEF_SCSI_QCMD(megaraid_queue_command)
1467
1468 /**
1469 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
1470 * @adapter : controller's soft state
1471 * @scp : mid-layer scsi command pointer
1472 * @busy : set if request could not be completed because of lack of
1473 * resources
1474 *
1475 * Transform the mid-layer scsi command to megaraid firmware lingua.
1476 * Convert the command issued by mid-layer to format understood by megaraid
1477 * firmware. We also complete certain commands without sending them to firmware.
1478 */
1479 static scb_t *
1480 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1481 {
1482 mraid_device_t *rdev = ADAP2RAIDDEV(adapter);
1483 int channel;
1484 int target;
1485 int islogical;
1486 mbox_ccb_t *ccb;
1487 mraid_passthru_t *pthru;
1488 mbox64_t *mbox64;
1489 mbox_t *mbox;
1490 scb_t *scb;
1491 char skip[] = "skipping";
1492 char scan[] = "scanning";
1493 char *ss;
1494
1495
1496 /*
1497 * Get the appropriate device map for the device this command is
1498 * intended for
1499 */
1500 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1501
1502 /*
1503 * Logical drive commands
1504 */
1505 if (islogical) {
1506 switch (scp->cmnd[0]) {
1507 case TEST_UNIT_READY:
1508 /*
1509 * Do we support clustering and is the support enabled
1510 * If no, return success always
1511 */
1512 if (!adapter->ha) {
1513 scp->result = (DID_OK << 16);
1514 return NULL;
1515 }
1516
1517 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1518 scp->result = (DID_ERROR << 16);
1519 *busy = 1;
1520 return NULL;
1521 }
1522
1523 scb->dma_direction = scp->sc_data_direction;
1524 scb->dev_channel = 0xFF;
1525 scb->dev_target = target;
1526 ccb = (mbox_ccb_t *)scb->ccb;
1527
1528 /*
1529 * The command id will be provided by the command
1530 * issuance routine
1531 */
1532 ccb->raw_mbox[0] = CLUSTER_CMD;
1533 ccb->raw_mbox[2] = RESERVATION_STATUS;
1534 ccb->raw_mbox[3] = target;
1535
1536 return scb;
1537
1538 case MODE_SENSE:
1539 {
1540 struct scatterlist *sgl;
1541 caddr_t vaddr;
1542
1543 sgl = scsi_sglist(scp);
1544 if (sg_page(sgl)) {
1545 vaddr = (caddr_t) sg_virt(&sgl[0]);
1546
1547 memset(vaddr, 0, scp->cmnd[4]);
1548 }
1549 else {
1550 con_log(CL_ANN, (KERN_WARNING
1551 "megaraid mailbox: invalid sg:%d\n",
1552 __LINE__));
1553 }
1554 }
1555 scp->result = (DID_OK << 16);
1556 return NULL;
1557
1558 case INQUIRY:
1559 /*
1560 * Display the channel scan for logical drives
1561 * Do not display scan for a channel if already done.
1562 */
1563 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1564
1565 con_log(CL_ANN, (KERN_INFO
1566 "scsi[%d]: scanning scsi channel %d",
1567 adapter->host->host_no,
1568 SCP2CHANNEL(scp)));
1569
1570 con_log(CL_ANN, (
1571 " [virtual] for logical drives\n"));
1572
1573 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1574 }
1575
1576 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1577 scsi_build_sense(scp, 0, ILLEGAL_REQUEST,
1578 MEGA_INVALID_FIELD_IN_CDB, 0);
1579 return NULL;
1580 }
1581
1582 fallthrough;
1583
1584 case READ_CAPACITY:
1585 /*
1586 * Do not allow LUN > 0 for logical drives and
1587 * requests for more than 40 logical drives
1588 */
1589 if (SCP2LUN(scp)) {
1590 scp->result = (DID_BAD_TARGET << 16);
1591 return NULL;
1592 }
1593 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1594 scp->result = (DID_BAD_TARGET << 16);
1595 return NULL;
1596 }
1597
1598
1599 /* Allocate a SCB and initialize passthru */
1600 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1601 scp->result = (DID_ERROR << 16);
1602 *busy = 1;
1603 return NULL;
1604 }
1605
1606 ccb = (mbox_ccb_t *)scb->ccb;
1607 scb->dev_channel = 0xFF;
1608 scb->dev_target = target;
1609 pthru = ccb->pthru;
1610 mbox = ccb->mbox;
1611 mbox64 = ccb->mbox64;
1612
1613 pthru->timeout = 0;
1614 pthru->ars = 1;
1615 pthru->reqsenselen = 14;
1616 pthru->islogical = 1;
1617 pthru->logdrv = target;
1618 pthru->cdblen = scp->cmd_len;
1619 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1620
1621 mbox->cmd = MBOXCMD_PASSTHRU64;
1622 scb->dma_direction = scp->sc_data_direction;
1623
1624 pthru->dataxferlen = scsi_bufflen(scp);
1625 pthru->dataxferaddr = ccb->sgl_dma_h;
1626 pthru->numsge = megaraid_mbox_mksgl(adapter,
1627 scb);
1628
1629 mbox->xferaddr = 0xFFFFFFFF;
1630 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h;
1631 mbox64->xferaddr_hi = 0;
1632
1633 return scb;
1634
1635 case READ_6:
1636 case WRITE_6:
1637 case READ_10:
1638 case WRITE_10:
1639 case READ_12:
1640 case WRITE_12:
1641
1642 /*
1643 * Allocate a SCB and initialize mailbox
1644 */
1645 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1646 scp->result = (DID_ERROR << 16);
1647 *busy = 1;
1648 return NULL;
1649 }
1650 ccb = (mbox_ccb_t *)scb->ccb;
1651 scb->dev_channel = 0xFF;
1652 scb->dev_target = target;
1653 mbox = ccb->mbox;
1654 mbox64 = ccb->mbox64;
1655 mbox->logdrv = target;
1656
1657 /*
1658 * A little HACK: 2nd bit is zero for all scsi read
1659 * commands and is set for all scsi write commands
1660 */
1661 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64:
1662 MBOXCMD_LREAD64 ;
1663
1664 /*
1665 * 6-byte READ(0x08) or WRITE(0x0A) cdb
1666 */
1667 if (scp->cmd_len == 6) {
1668 mbox->numsectors = (uint32_t)scp->cmnd[4];
1669 mbox->lba =
1670 ((uint32_t)scp->cmnd[1] << 16) |
1671 ((uint32_t)scp->cmnd[2] << 8) |
1672 (uint32_t)scp->cmnd[3];
1673
1674 mbox->lba &= 0x1FFFFF;
1675 }
1676
1677 /*
1678 * 10-byte READ(0x28) or WRITE(0x2A) cdb
1679 */
1680 else if (scp->cmd_len == 10) {
1681 mbox->numsectors =
1682 (uint32_t)scp->cmnd[8] |
1683 ((uint32_t)scp->cmnd[7] << 8);
1684 mbox->lba =
1685 ((uint32_t)scp->cmnd[2] << 24) |
1686 ((uint32_t)scp->cmnd[3] << 16) |
1687 ((uint32_t)scp->cmnd[4] << 8) |
1688 (uint32_t)scp->cmnd[5];
1689 }
1690
1691 /*
1692 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1693 */
1694 else if (scp->cmd_len == 12) {
1695 mbox->lba =
1696 ((uint32_t)scp->cmnd[2] << 24) |
1697 ((uint32_t)scp->cmnd[3] << 16) |
1698 ((uint32_t)scp->cmnd[4] << 8) |
1699 (uint32_t)scp->cmnd[5];
1700
1701 mbox->numsectors =
1702 ((uint32_t)scp->cmnd[6] << 24) |
1703 ((uint32_t)scp->cmnd[7] << 16) |
1704 ((uint32_t)scp->cmnd[8] << 8) |
1705 (uint32_t)scp->cmnd[9];
1706 }
1707 else {
1708 con_log(CL_ANN, (KERN_WARNING
1709 "megaraid: unsupported CDB length\n"));
1710
1711 megaraid_dealloc_scb(adapter, scb);
1712
1713 scp->result = (DID_ERROR << 16);
1714 return NULL;
1715 }
1716
1717 scb->dma_direction = scp->sc_data_direction;
1718
1719 // Calculate Scatter-Gather info
1720 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h;
1721 mbox->numsge = megaraid_mbox_mksgl(adapter,
1722 scb);
1723 mbox->xferaddr = 0xFFFFFFFF;
1724 mbox64->xferaddr_hi = 0;
1725
1726 return scb;
1727
1728 case RESERVE:
1729 case RELEASE:
1730 /*
1731 * Do we support clustering and is the support enabled
1732 */
1733 if (!adapter->ha) {
1734 scp->result = (DID_BAD_TARGET << 16);
1735 return NULL;
1736 }
1737
1738 /*
1739 * Allocate a SCB and initialize mailbox
1740 */
1741 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1742 scp->result = (DID_ERROR << 16);
1743 *busy = 1;
1744 return NULL;
1745 }
1746
1747 ccb = (mbox_ccb_t *)scb->ccb;
1748 scb->dev_channel = 0xFF;
1749 scb->dev_target = target;
1750 ccb->raw_mbox[0] = CLUSTER_CMD;
1751 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ?
1752 RESERVE_LD : RELEASE_LD;
1753
1754 ccb->raw_mbox[3] = target;
1755 scb->dma_direction = scp->sc_data_direction;
1756
1757 return scb;
1758
1759 default:
1760 scp->result = (DID_BAD_TARGET << 16);
1761 return NULL;
1762 }
1763 }
1764 else { // Passthru device commands
1765
1766 // Do not allow access to target id > 15 or LUN > 7
1767 if (target > 15 || SCP2LUN(scp) > 7) {
1768 scp->result = (DID_BAD_TARGET << 16);
1769 return NULL;
1770 }
1771
1772 // if fast load option was set and scan for last device is
1773 // over, reset the fast_load flag so that during a possible
1774 // next scan, devices can be made available
1775 if (rdev->fast_load && (target == 15) &&
1776 (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1777
1778 con_log(CL_ANN, (KERN_INFO
1779 "megaraid[%d]: physical device scan re-enabled\n",
1780 adapter->host->host_no));
1781 rdev->fast_load = 0;
1782 }
1783
1784 /*
1785 * Display the channel scan for physical devices
1786 */
1787 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1788
1789 ss = rdev->fast_load ? skip : scan;
1790
1791 con_log(CL_ANN, (KERN_INFO
1792 "scsi[%d]: %s scsi channel %d [Phy %d]",
1793 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1794 channel));
1795
1796 con_log(CL_ANN, (
1797 " for non-raid devices\n"));
1798
1799 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1800 }
1801
1802 // disable channel sweep if fast load option given
1803 if (rdev->fast_load) {
1804 scp->result = (DID_BAD_TARGET << 16);
1805 return NULL;
1806 }
1807
1808 // Allocate a SCB and initialize passthru
1809 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1810 scp->result = (DID_ERROR << 16);
1811 *busy = 1;
1812 return NULL;
1813 }
1814
1815 ccb = (mbox_ccb_t *)scb->ccb;
1816 scb->dev_channel = channel;
1817 scb->dev_target = target;
1818 scb->dma_direction = scp->sc_data_direction;
1819 mbox = ccb->mbox;
1820 mbox64 = ccb->mbox64;
1821
1822 // Does this firmware support extended CDBs
1823 if (adapter->max_cdb_sz == 16) {
1824 mbox->cmd = MBOXCMD_EXTPTHRU;
1825
1826 megaraid_mbox_prepare_epthru(adapter, scb, scp);
1827
1828 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h;
1829 mbox64->xferaddr_hi = 0;
1830 mbox->xferaddr = 0xFFFFFFFF;
1831 }
1832 else {
1833 mbox->cmd = MBOXCMD_PASSTHRU64;
1834
1835 megaraid_mbox_prepare_pthru(adapter, scb, scp);
1836
1837 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h;
1838 mbox64->xferaddr_hi = 0;
1839 mbox->xferaddr = 0xFFFFFFFF;
1840 }
1841 return scb;
1842 }
1843
1844 // NOT REACHED
1845 }
1846
1847
1848 /**
1849 * megaraid_mbox_runpendq - execute commands queued in the pending queue
1850 * @adapter : controller's soft state
1851 * @scb_q : SCB to be queued in the pending list
1852 *
1853 * Scan the pending list for commands which are not yet issued and try to
1854 * post to the controller. The SCB can be a null pointer, which would indicate
1855 * no SCB to be queue, just try to execute the ones in the pending list.
1856 *
1857 * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1858 * out from the head of the pending list. If it is successfully issued, the
1859 * next SCB is at the head now.
1860 */
1861 static void
megaraid_mbox_runpendq(adapter_t * adapter,scb_t * scb_q)1862 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1863 {
1864 scb_t *scb;
1865 unsigned long flags;
1866
1867 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1868
1869 if (scb_q) {
1870 scb_q->state = SCB_PENDQ;
1871 list_add_tail(&scb_q->list, &adapter->pend_list);
1872 }
1873
1874 // if the adapter in not in quiescent mode, post the commands to FW
1875 if (adapter->quiescent) {
1876 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1877 return;
1878 }
1879
1880 while (!list_empty(&adapter->pend_list)) {
1881
1882 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1883
1884 scb = list_entry(adapter->pend_list.next, scb_t, list);
1885
1886 // remove the scb from the pending list and try to
1887 // issue. If we are unable to issue it, put back in
1888 // the pending list and return
1889
1890 list_del_init(&scb->list);
1891
1892 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1893
1894 // if mailbox was busy, return SCB back to pending
1895 // list. Make sure to add at the head, since that's
1896 // where it would have been removed from
1897
1898 scb->state = SCB_ISSUED;
1899
1900 if (mbox_post_cmd(adapter, scb) != 0) {
1901
1902 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1903
1904 scb->state = SCB_PENDQ;
1905
1906 list_add(&scb->list, &adapter->pend_list);
1907
1908 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1909 flags);
1910
1911 return;
1912 }
1913
1914 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1915 }
1916
1917 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1918
1919
1920 return;
1921 }
1922
1923
1924 /**
1925 * megaraid_mbox_prepare_pthru - prepare a command for physical devices
1926 * @adapter : pointer to controller's soft state
1927 * @scb : scsi control block
1928 * @scp : scsi command from the mid-layer
1929 *
1930 * Prepare a command for the scsi physical devices.
1931 */
1932 static void
megaraid_mbox_prepare_pthru(adapter_t * adapter,scb_t * scb,struct scsi_cmnd * scp)1933 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1934 struct scsi_cmnd *scp)
1935 {
1936 mbox_ccb_t *ccb;
1937 mraid_passthru_t *pthru;
1938 uint8_t channel;
1939 uint8_t target;
1940
1941 ccb = (mbox_ccb_t *)scb->ccb;
1942 pthru = ccb->pthru;
1943 channel = scb->dev_channel;
1944 target = scb->dev_target;
1945
1946 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1947 pthru->timeout = 4;
1948 pthru->ars = 1;
1949 pthru->islogical = 0;
1950 pthru->channel = 0;
1951 pthru->target = (channel << 4) | target;
1952 pthru->logdrv = SCP2LUN(scp);
1953 pthru->reqsenselen = 14;
1954 pthru->cdblen = scp->cmd_len;
1955
1956 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1957
1958 if (scsi_bufflen(scp)) {
1959 pthru->dataxferlen = scsi_bufflen(scp);
1960 pthru->dataxferaddr = ccb->sgl_dma_h;
1961 pthru->numsge = megaraid_mbox_mksgl(adapter, scb);
1962 }
1963 else {
1964 pthru->dataxferaddr = 0;
1965 pthru->dataxferlen = 0;
1966 pthru->numsge = 0;
1967 }
1968 return;
1969 }
1970
1971
1972 /**
1973 * megaraid_mbox_prepare_epthru - prepare a command for physical devices
1974 * @adapter : pointer to controller's soft state
1975 * @scb : scsi control block
1976 * @scp : scsi command from the mid-layer
1977 *
1978 * Prepare a command for the scsi physical devices. This routine prepares
1979 * commands for devices which can take extended CDBs (>10 bytes).
1980 */
1981 static void
megaraid_mbox_prepare_epthru(adapter_t * adapter,scb_t * scb,struct scsi_cmnd * scp)1982 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
1983 struct scsi_cmnd *scp)
1984 {
1985 mbox_ccb_t *ccb;
1986 mraid_epassthru_t *epthru;
1987 uint8_t channel;
1988 uint8_t target;
1989
1990 ccb = (mbox_ccb_t *)scb->ccb;
1991 epthru = ccb->epthru;
1992 channel = scb->dev_channel;
1993 target = scb->dev_target;
1994
1995 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1996 epthru->timeout = 4;
1997 epthru->ars = 1;
1998 epthru->islogical = 0;
1999 epthru->channel = 0;
2000 epthru->target = (channel << 4) | target;
2001 epthru->logdrv = SCP2LUN(scp);
2002 epthru->reqsenselen = 14;
2003 epthru->cdblen = scp->cmd_len;
2004
2005 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2006
2007 if (scsi_bufflen(scp)) {
2008 epthru->dataxferlen = scsi_bufflen(scp);
2009 epthru->dataxferaddr = ccb->sgl_dma_h;
2010 epthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2011 }
2012 else {
2013 epthru->dataxferaddr = 0;
2014 epthru->dataxferlen = 0;
2015 epthru->numsge = 0;
2016 }
2017 return;
2018 }
2019
2020
2021 /**
2022 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2023 * @adapter : controller's soft state
2024 *
2025 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
2026 * completed command and put them on the completed list for later processing.
2027 *
2028 * Returns: 1 if the interrupt is valid, 0 otherwise
2029 */
2030 static int
megaraid_ack_sequence(adapter_t * adapter)2031 megaraid_ack_sequence(adapter_t *adapter)
2032 {
2033 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2034 mbox_t *mbox;
2035 scb_t *scb;
2036 uint8_t nstatus;
2037 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS];
2038 struct list_head clist;
2039 int handled;
2040 uint32_t dword;
2041 unsigned long flags;
2042 int i, j;
2043
2044
2045 mbox = raid_dev->mbox;
2046
2047 // move the SCBs from the firmware completed array to our local list
2048 INIT_LIST_HEAD(&clist);
2049
2050 // loop till F/W has more commands for us to complete
2051 handled = 0;
2052 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2053 do {
2054 /*
2055 * Check if a valid interrupt is pending. If found, force the
2056 * interrupt line low.
2057 */
2058 dword = RDOUTDOOR(raid_dev);
2059 if (dword != 0x10001234) break;
2060
2061 handled = 1;
2062
2063 WROUTDOOR(raid_dev, 0x10001234);
2064
2065 nstatus = 0;
2066 // wait for valid numstatus to post
2067 for (i = 0; i < 0xFFFFF; i++) {
2068 if (mbox->numstatus != 0xFF) {
2069 nstatus = mbox->numstatus;
2070 break;
2071 }
2072 rmb();
2073 }
2074 mbox->numstatus = 0xFF;
2075
2076 adapter->outstanding_cmds -= nstatus;
2077
2078 for (i = 0; i < nstatus; i++) {
2079
2080 // wait for valid command index to post
2081 for (j = 0; j < 0xFFFFF; j++) {
2082 if (mbox->completed[i] != 0xFF) break;
2083 rmb();
2084 }
2085 completed[i] = mbox->completed[i];
2086 mbox->completed[i] = 0xFF;
2087
2088 if (completed[i] == 0xFF) {
2089 con_log(CL_ANN, (KERN_CRIT
2090 "megaraid: command posting timed out\n"));
2091
2092 BUG();
2093 continue;
2094 }
2095
2096 // Get SCB associated with this command id
2097 if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2098 // a cmm command
2099 scb = adapter->uscb_list + (completed[i] -
2100 MBOX_MAX_SCSI_CMDS);
2101 }
2102 else {
2103 // an os command
2104 scb = adapter->kscb_list + completed[i];
2105 }
2106
2107 scb->status = mbox->status;
2108 list_add_tail(&scb->list, &clist);
2109 }
2110
2111 // Acknowledge interrupt
2112 WRINDOOR(raid_dev, 0x02);
2113
2114 } while(1);
2115
2116 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2117
2118
2119 // put the completed commands in the completed list. DPC would
2120 // complete these commands later
2121 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2122
2123 list_splice(&clist, &adapter->completed_list);
2124
2125 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2126
2127
2128 // schedule the DPC if there is some work for it
2129 if (handled)
2130 tasklet_schedule(&adapter->dpc_h);
2131
2132 return handled;
2133 }
2134
2135
2136 /**
2137 * megaraid_isr - isr for memory based mailbox based controllers
2138 * @irq : irq
2139 * @devp : pointer to our soft state
2140 *
2141 * Interrupt service routine for memory-mapped mailbox controllers.
2142 */
2143 static irqreturn_t
megaraid_isr(int irq,void * devp)2144 megaraid_isr(int irq, void *devp)
2145 {
2146 adapter_t *adapter = devp;
2147 int handled;
2148
2149 handled = megaraid_ack_sequence(adapter);
2150
2151 /* Loop through any pending requests */
2152 if (!adapter->quiescent) {
2153 megaraid_mbox_runpendq(adapter, NULL);
2154 }
2155
2156 return IRQ_RETVAL(handled);
2157 }
2158
2159
2160 /**
2161 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2162 * @devp : pointer to HBA soft state
2163 *
2164 * Pick up the commands from the completed list and send back to the owners.
2165 * This is a reentrant function and does not assume any locks are held while
2166 * it is being called.
2167 */
2168 static void
megaraid_mbox_dpc(unsigned long devp)2169 megaraid_mbox_dpc(unsigned long devp)
2170 {
2171 adapter_t *adapter = (adapter_t *)devp;
2172 mraid_device_t *raid_dev;
2173 struct list_head clist;
2174 struct scatterlist *sgl;
2175 scb_t *scb;
2176 scb_t *tmp;
2177 struct scsi_cmnd *scp;
2178 mraid_passthru_t *pthru;
2179 mraid_epassthru_t *epthru;
2180 mbox_ccb_t *ccb;
2181 int islogical;
2182 int pdev_index;
2183 int pdev_state;
2184 mbox_t *mbox;
2185 unsigned long flags;
2186 uint8_t c;
2187 int status;
2188 uioc_t *kioc;
2189
2190
2191 if (!adapter) return;
2192
2193 raid_dev = ADAP2RAIDDEV(adapter);
2194
2195 // move the SCBs from the completed list to our local list
2196 INIT_LIST_HEAD(&clist);
2197
2198 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2199
2200 list_splice_init(&adapter->completed_list, &clist);
2201
2202 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2203
2204
2205 list_for_each_entry_safe(scb, tmp, &clist, list) {
2206
2207 status = scb->status;
2208 scp = scb->scp;
2209 ccb = (mbox_ccb_t *)scb->ccb;
2210 pthru = ccb->pthru;
2211 epthru = ccb->epthru;
2212 mbox = ccb->mbox;
2213
2214 // Make sure f/w has completed a valid command
2215 if (scb->state != SCB_ISSUED) {
2216 con_log(CL_ANN, (KERN_CRIT
2217 "megaraid critical err: invalid command %d:%d:%p\n",
2218 scb->sno, scb->state, scp));
2219 BUG();
2220 continue; // Must never happen!
2221 }
2222
2223 // check for the management command and complete it right away
2224 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2225 scb->state = SCB_FREE;
2226 scb->status = status;
2227
2228 // remove from local clist
2229 list_del_init(&scb->list);
2230
2231 kioc = (uioc_t *)scb->gp;
2232 kioc->status = 0;
2233
2234 megaraid_mbox_mm_done(adapter, scb);
2235
2236 continue;
2237 }
2238
2239 // Was an abort issued for this command earlier
2240 if (scb->state & SCB_ABORT) {
2241 con_log(CL_ANN, (KERN_NOTICE
2242 "megaraid: aborted cmd [%x] completed\n",
2243 scb->sno));
2244 }
2245
2246 /*
2247 * If the inquiry came of a disk drive which is not part of
2248 * any RAID array, expose it to the kernel. For this to be
2249 * enabled, user must set the "megaraid_expose_unconf_disks"
2250 * flag to 1 by specifying it on module parameter list.
2251 * This would enable data migration off drives from other
2252 * configurations.
2253 */
2254 islogical = MRAID_IS_LOGICAL(adapter, scp);
2255 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2256 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2257
2258 sgl = scsi_sglist(scp);
2259 if (sg_page(sgl)) {
2260 c = *(unsigned char *) sg_virt(&sgl[0]);
2261 } else {
2262 con_log(CL_ANN, (KERN_WARNING
2263 "megaraid mailbox: invalid sg:%d\n",
2264 __LINE__));
2265 c = 0;
2266 }
2267
2268 if ((c & 0x1F ) == TYPE_DISK) {
2269 pdev_index = (scb->dev_channel * 16) +
2270 scb->dev_target;
2271 pdev_state =
2272 raid_dev->pdrv_state[pdev_index] & 0x0F;
2273
2274 if (pdev_state == PDRV_ONLINE ||
2275 pdev_state == PDRV_FAILED ||
2276 pdev_state == PDRV_RBLD ||
2277 pdev_state == PDRV_HOTSPARE ||
2278 megaraid_expose_unconf_disks == 0) {
2279
2280 status = 0xF0;
2281 }
2282 }
2283 }
2284
2285 // Convert MegaRAID status to Linux error code
2286 switch (status) {
2287
2288 case 0x00:
2289
2290 scp->result = (DID_OK << 16);
2291 break;
2292
2293 case 0x02:
2294
2295 /* set sense_buffer and result fields */
2296 if (mbox->cmd == MBOXCMD_PASSTHRU ||
2297 mbox->cmd == MBOXCMD_PASSTHRU64) {
2298
2299 memcpy(scp->sense_buffer, pthru->reqsensearea,
2300 14);
2301
2302 scp->result = SAM_STAT_CHECK_CONDITION;
2303 }
2304 else {
2305 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2306
2307 memcpy(scp->sense_buffer,
2308 epthru->reqsensearea, 14);
2309
2310 scp->result = SAM_STAT_CHECK_CONDITION;
2311 } else
2312 scsi_build_sense(scp, 0,
2313 ABORTED_COMMAND, 0, 0);
2314 }
2315 break;
2316
2317 case 0x08:
2318
2319 scp->result = DID_BUS_BUSY << 16 | status;
2320 break;
2321
2322 default:
2323
2324 /*
2325 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2326 * failed
2327 */
2328 if (scp->cmnd[0] == TEST_UNIT_READY) {
2329 scp->result = DID_ERROR << 16 |
2330 SAM_STAT_RESERVATION_CONFLICT;
2331 }
2332 else
2333 /*
2334 * Error code returned is 1 if Reserve or Release
2335 * failed or the input parameter is invalid
2336 */
2337 if (status == 1 && (scp->cmnd[0] == RESERVE ||
2338 scp->cmnd[0] == RELEASE)) {
2339
2340 scp->result = DID_ERROR << 16 |
2341 SAM_STAT_RESERVATION_CONFLICT;
2342 }
2343 else {
2344 scp->result = DID_BAD_TARGET << 16 | status;
2345 }
2346 }
2347
2348 // print a debug message for all failed commands
2349 if (status) {
2350 megaraid_mbox_display_scb(adapter, scb);
2351 }
2352
2353 scsi_dma_unmap(scp);
2354
2355 // remove from local clist
2356 list_del_init(&scb->list);
2357
2358 // put back in free list
2359 megaraid_dealloc_scb(adapter, scb);
2360
2361 // send the scsi packet back to kernel
2362 scsi_done(scp);
2363 }
2364
2365 return;
2366 }
2367
2368
2369 /**
2370 * megaraid_abort_handler - abort the scsi command
2371 * @scp : command to be aborted
2372 *
2373 * Abort a previous SCSI request. Only commands on the pending list can be
2374 * aborted. All the commands issued to the F/W must complete.
2375 **/
2376 static int
megaraid_abort_handler(struct scsi_cmnd * scp)2377 megaraid_abort_handler(struct scsi_cmnd *scp)
2378 {
2379 adapter_t *adapter;
2380 mraid_device_t *raid_dev;
2381 scb_t *scb;
2382 scb_t *tmp;
2383 int found;
2384 unsigned long flags;
2385 int i;
2386
2387
2388 adapter = SCP2ADAPTER(scp);
2389 raid_dev = ADAP2RAIDDEV(adapter);
2390
2391 con_log(CL_ANN, (KERN_WARNING
2392 "megaraid: aborting cmd=%x <c=%d t=%d l=%d>\n",
2393 scp->cmnd[0], SCP2CHANNEL(scp),
2394 SCP2TARGET(scp), SCP2LUN(scp)));
2395
2396 // If FW has stopped responding, simply return failure
2397 if (raid_dev->hw_error) {
2398 con_log(CL_ANN, (KERN_NOTICE
2399 "megaraid: hw error, not aborting\n"));
2400 return FAILED;
2401 }
2402
2403 // There might a race here, where the command was completed by the
2404 // firmware and now it is on the completed list. Before we could
2405 // complete the command to the kernel in dpc, the abort came.
2406 // Find out if this is the case to avoid the race.
2407 scb = NULL;
2408 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2409 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2410
2411 if (scb->scp == scp) { // Found command
2412
2413 list_del_init(&scb->list); // from completed list
2414
2415 con_log(CL_ANN, (KERN_WARNING
2416 "megaraid: %d[%d:%d], abort from completed list\n",
2417 scb->sno, scb->dev_channel, scb->dev_target));
2418
2419 scp->result = (DID_ABORT << 16);
2420 scsi_done(scp);
2421
2422 megaraid_dealloc_scb(adapter, scb);
2423
2424 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2425 flags);
2426
2427 return SUCCESS;
2428 }
2429 }
2430 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2431
2432
2433 // Find out if this command is still on the pending list. If it is and
2434 // was never issued, abort and return success. If the command is owned
2435 // by the firmware, we must wait for it to complete by the FW.
2436 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2437 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2438
2439 if (scb->scp == scp) { // Found command
2440
2441 list_del_init(&scb->list); // from pending list
2442
2443 ASSERT(!(scb->state & SCB_ISSUED));
2444
2445 con_log(CL_ANN, (KERN_WARNING
2446 "megaraid abort: [%d:%d], driver owner\n",
2447 scb->dev_channel, scb->dev_target));
2448
2449 scp->result = (DID_ABORT << 16);
2450 scsi_done(scp);
2451
2452 megaraid_dealloc_scb(adapter, scb);
2453
2454 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2455 flags);
2456
2457 return SUCCESS;
2458 }
2459 }
2460 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2461
2462
2463 // Check do we even own this command, in which case this would be
2464 // owned by the firmware. The only way to locate the FW scb is to
2465 // traverse through the list of all SCB, since driver does not
2466 // maintain these SCBs on any list
2467 found = 0;
2468 spin_lock_irq(&adapter->lock);
2469 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2470 scb = adapter->kscb_list + i;
2471
2472 if (scb->scp == scp) {
2473
2474 found = 1;
2475
2476 if (!(scb->state & SCB_ISSUED)) {
2477 con_log(CL_ANN, (KERN_WARNING
2478 "megaraid abort: %d[%d:%d], invalid state\n",
2479 scb->sno, scb->dev_channel, scb->dev_target));
2480 BUG();
2481 }
2482 else {
2483 con_log(CL_ANN, (KERN_WARNING
2484 "megaraid abort: %d[%d:%d], fw owner\n",
2485 scb->sno, scb->dev_channel, scb->dev_target));
2486 }
2487 }
2488 }
2489 spin_unlock_irq(&adapter->lock);
2490
2491 if (!found) {
2492 con_log(CL_ANN, (KERN_WARNING "megaraid abort: do now own\n"));
2493
2494 // FIXME: Should there be a callback for this command?
2495 return SUCCESS;
2496 }
2497
2498 // We cannot actually abort a command owned by firmware, return
2499 // failure and wait for reset. In host reset handler, we will find out
2500 // if the HBA is still live
2501 return FAILED;
2502 }
2503
2504 /**
2505 * megaraid_reset_handler - device reset handler for mailbox based driver
2506 * @scp : reference command
2507 *
2508 * Reset handler for the mailbox based controller. First try to find out if
2509 * the FW is still live, in which case the outstanding commands counter mut go
2510 * down to 0. If that happens, also issue the reservation reset command to
2511 * relinquish (possible) reservations on the logical drives connected to this
2512 * host.
2513 **/
2514 static int
megaraid_reset_handler(struct scsi_cmnd * scp)2515 megaraid_reset_handler(struct scsi_cmnd *scp)
2516 {
2517 adapter_t *adapter;
2518 scb_t *scb;
2519 scb_t *tmp;
2520 mraid_device_t *raid_dev;
2521 unsigned long flags;
2522 uint8_t raw_mbox[sizeof(mbox_t)];
2523 int rval;
2524 int recovery_window;
2525 int i;
2526 uioc_t *kioc;
2527
2528 adapter = SCP2ADAPTER(scp);
2529 raid_dev = ADAP2RAIDDEV(adapter);
2530
2531 // return failure if adapter is not responding
2532 if (raid_dev->hw_error) {
2533 con_log(CL_ANN, (KERN_NOTICE
2534 "megaraid: hw error, cannot reset\n"));
2535 return FAILED;
2536 }
2537
2538 // Under exceptional conditions, FW can take up to 3 minutes to
2539 // complete command processing. Wait for additional 2 minutes for the
2540 // pending commands counter to go down to 0. If it doesn't, let the
2541 // controller be marked offline
2542 // Also, reset all the commands currently owned by the driver
2543 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2544 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2545 list_del_init(&scb->list); // from pending list
2546
2547 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2548 con_log(CL_ANN, (KERN_WARNING
2549 "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2550 scb->sno, scb->dev_channel, scb->dev_target));
2551
2552 scb->status = -1;
2553
2554 kioc = (uioc_t *)scb->gp;
2555 kioc->status = -EFAULT;
2556
2557 megaraid_mbox_mm_done(adapter, scb);
2558 } else {
2559 if (scb->scp == scp) { // Found command
2560 con_log(CL_ANN, (KERN_WARNING
2561 "megaraid: %d[%d:%d], reset from pending list\n",
2562 scb->sno, scb->dev_channel, scb->dev_target));
2563 } else {
2564 con_log(CL_ANN, (KERN_WARNING
2565 "megaraid: IO packet with %d[%d:%d] being reset\n",
2566 scb->sno, scb->dev_channel, scb->dev_target));
2567 }
2568
2569 scb->scp->result = (DID_RESET << 16);
2570 scsi_done(scb->scp);
2571
2572 megaraid_dealloc_scb(adapter, scb);
2573 }
2574 }
2575 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2576
2577 if (adapter->outstanding_cmds) {
2578 con_log(CL_ANN, (KERN_NOTICE
2579 "megaraid: %d outstanding commands. Max wait %d sec\n",
2580 adapter->outstanding_cmds,
2581 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
2582 }
2583
2584 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2585
2586 for (i = 0; i < recovery_window; i++) {
2587
2588 megaraid_ack_sequence(adapter);
2589
2590 // print a message once every 5 seconds only
2591 if (!(i % 5)) {
2592 con_log(CL_ANN, (
2593 "megaraid mbox: Wait for %d commands to complete:%d\n",
2594 adapter->outstanding_cmds,
2595 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
2596 }
2597
2598 // bailout if no recovery happened in reset time
2599 if (adapter->outstanding_cmds == 0) {
2600 break;
2601 }
2602
2603 msleep(1000);
2604 }
2605
2606 spin_lock(&adapter->lock);
2607
2608 // If still outstanding commands, bail out
2609 if (adapter->outstanding_cmds) {
2610 con_log(CL_ANN, (KERN_WARNING
2611 "megaraid mbox: critical hardware error!\n"));
2612
2613 raid_dev->hw_error = 1;
2614
2615 rval = FAILED;
2616 goto out;
2617 }
2618 else {
2619 con_log(CL_ANN, (KERN_NOTICE
2620 "megaraid mbox: reset sequence completed successfully\n"));
2621 }
2622
2623
2624 // If the controller supports clustering, reset reservations
2625 if (!adapter->ha) {
2626 rval = SUCCESS;
2627 goto out;
2628 }
2629
2630 // clear reservations if any
2631 raw_mbox[0] = CLUSTER_CMD;
2632 raw_mbox[2] = RESET_RESERVATIONS;
2633
2634 rval = SUCCESS;
2635 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2636 con_log(CL_ANN,
2637 (KERN_INFO "megaraid: reservation reset\n"));
2638 }
2639 else {
2640 rval = FAILED;
2641 con_log(CL_ANN, (KERN_WARNING
2642 "megaraid: reservation reset failed\n"));
2643 }
2644
2645 out:
2646 spin_unlock(&adapter->lock);
2647 return rval;
2648 }
2649
2650 /*
2651 * START: internal commands library
2652 *
2653 * This section of the driver has the common routine used by the driver and
2654 * also has all the FW routines
2655 */
2656
2657 /**
2658 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2659 * @adapter : controller's soft state
2660 * @raw_mbox : the mailbox
2661 *
2662 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2663 * controllers.
2664 */
2665 static int
mbox_post_sync_cmd(adapter_t * adapter,uint8_t raw_mbox[])2666 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2667 {
2668 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2669 mbox_t *mbox;
2670 uint8_t status;
2671 int i;
2672
2673 mbox = raid_dev->mbox;
2674
2675 /*
2676 * Wait until mailbox is free
2677 */
2678 if (megaraid_busywait_mbox(raid_dev) != 0)
2679 goto blocked_mailbox;
2680
2681 /*
2682 * Copy mailbox data into host structure
2683 */
2684 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2685 mbox->cmdid = 0xFE;
2686 mbox->busy = 1;
2687 mbox->poll = 0;
2688 mbox->ack = 0;
2689 mbox->numstatus = 0xFF;
2690 mbox->status = 0xFF;
2691
2692 wmb();
2693 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2694
2695 // wait for maximum 1 second for status to post. If the status is not
2696 // available within 1 second, assume FW is initializing and wait
2697 // for an extended amount of time
2698 if (mbox->numstatus == 0xFF) { // status not yet available
2699 udelay(25);
2700
2701 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2702 rmb();
2703 msleep(1);
2704 }
2705
2706
2707 if (i == 1000) {
2708 con_log(CL_ANN, (KERN_NOTICE
2709 "megaraid mailbox: wait for FW to boot "));
2710
2711 for (i = 0; (mbox->numstatus == 0xFF) &&
2712 (i < MBOX_RESET_WAIT); i++) {
2713 rmb();
2714 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2715 MBOX_RESET_WAIT - i));
2716 msleep(1000);
2717 }
2718
2719 if (i == MBOX_RESET_WAIT) {
2720
2721 con_log(CL_ANN, (
2722 "\nmegaraid mailbox: status not available\n"));
2723
2724 return -1;
2725 }
2726 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2727 }
2728 }
2729
2730 // wait for maximum 1 second for poll semaphore
2731 if (mbox->poll != 0x77) {
2732 udelay(25);
2733
2734 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2735 rmb();
2736 msleep(1);
2737 }
2738
2739 if (i == 1000) {
2740 con_log(CL_ANN, (KERN_WARNING
2741 "megaraid mailbox: could not get poll semaphore\n"));
2742 return -1;
2743 }
2744 }
2745
2746 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2747 wmb();
2748
2749 // wait for maximum 1 second for acknowledgement
2750 if (RDINDOOR(raid_dev) & 0x2) {
2751 udelay(25);
2752
2753 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2754 rmb();
2755 msleep(1);
2756 }
2757
2758 if (i == 1000) {
2759 con_log(CL_ANN, (KERN_WARNING
2760 "megaraid mailbox: could not acknowledge\n"));
2761 return -1;
2762 }
2763 }
2764 mbox->poll = 0;
2765 mbox->ack = 0x77;
2766
2767 status = mbox->status;
2768
2769 // invalidate the completed command id array. After command
2770 // completion, firmware would write the valid id.
2771 mbox->numstatus = 0xFF;
2772 mbox->status = 0xFF;
2773 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2774 mbox->completed[i] = 0xFF;
2775 }
2776
2777 return status;
2778
2779 blocked_mailbox:
2780
2781 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2782 return -1;
2783 }
2784
2785
2786 /**
2787 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2788 * @adapter : controller's soft state
2789 * @raw_mbox : the mailbox
2790 *
2791 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2792 * controllers. This is a faster version of the synchronous command and
2793 * therefore can be called in interrupt-context as well.
2794 */
2795 static int
mbox_post_sync_cmd_fast(adapter_t * adapter,uint8_t raw_mbox[])2796 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2797 {
2798 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2799 mbox_t *mbox;
2800 long i;
2801
2802
2803 mbox = raid_dev->mbox;
2804
2805 // return immediately if the mailbox is busy
2806 if (mbox->busy) return -1;
2807
2808 // Copy mailbox data into host structure
2809 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2810 mbox->cmdid = 0xFE;
2811 mbox->busy = 1;
2812 mbox->poll = 0;
2813 mbox->ack = 0;
2814 mbox->numstatus = 0xFF;
2815 mbox->status = 0xFF;
2816
2817 wmb();
2818 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2819
2820 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
2821 if (mbox->numstatus != 0xFF) break;
2822 rmb();
2823 udelay(MBOX_SYNC_DELAY_200);
2824 }
2825
2826 if (i == MBOX_SYNC_WAIT_CNT) {
2827 // We may need to re-calibrate the counter
2828 con_log(CL_ANN, (KERN_CRIT
2829 "megaraid: fast sync command timed out\n"));
2830 }
2831
2832 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2833 wmb();
2834
2835 return mbox->status;
2836 }
2837
2838
2839 /**
2840 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
2841 * @raid_dev : RAID device (HBA) soft state
2842 *
2843 * Wait until the controller's mailbox is available to accept more commands.
2844 * Wait for at most 1 second.
2845 */
2846 static int
megaraid_busywait_mbox(mraid_device_t * raid_dev)2847 megaraid_busywait_mbox(mraid_device_t *raid_dev)
2848 {
2849 mbox_t *mbox = raid_dev->mbox;
2850 int i = 0;
2851
2852 if (mbox->busy) {
2853 udelay(25);
2854 for (i = 0; mbox->busy && i < 1000; i++)
2855 msleep(1);
2856 }
2857
2858 if (i < 1000) return 0;
2859 else return -1;
2860 }
2861
2862
2863 /**
2864 * megaraid_mbox_product_info - some static information about the controller
2865 * @adapter : our soft state
2866 *
2867 * Issue commands to the controller to grab some parameters required by our
2868 * caller.
2869 */
2870 static int
megaraid_mbox_product_info(adapter_t * adapter)2871 megaraid_mbox_product_info(adapter_t *adapter)
2872 {
2873 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2874 mbox_t *mbox;
2875 uint8_t raw_mbox[sizeof(mbox_t)];
2876 mraid_pinfo_t *pinfo;
2877 dma_addr_t pinfo_dma_h;
2878 mraid_inquiry3_t *mraid_inq3;
2879 int i;
2880
2881
2882 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2883 mbox = (mbox_t *)raw_mbox;
2884
2885 /*
2886 * Issue an ENQUIRY3 command to find out certain adapter parameters,
2887 * e.g., max channels, max commands etc.
2888 */
2889 pinfo = dma_alloc_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t),
2890 &pinfo_dma_h, GFP_KERNEL);
2891 if (pinfo == NULL) {
2892 con_log(CL_ANN, (KERN_WARNING
2893 "megaraid: out of memory, %s %d\n", __func__,
2894 __LINE__));
2895
2896 return -1;
2897 }
2898
2899 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
2900 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
2901
2902 raw_mbox[0] = FC_NEW_CONFIG;
2903 raw_mbox[2] = NC_SUBOP_ENQUIRY3;
2904 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
2905
2906 // Issue the command
2907 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
2908
2909 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
2910
2911 dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t),
2912 pinfo, pinfo_dma_h);
2913
2914 return -1;
2915 }
2916
2917 /*
2918 * Collect information about state of each physical drive
2919 * attached to the controller. We will expose all the disks
2920 * which are not part of RAID
2921 */
2922 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
2923 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
2924 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
2925 }
2926
2927 /*
2928 * Get product info for information like number of channels,
2929 * maximum commands supported.
2930 */
2931 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2932 mbox->xferaddr = (uint32_t)pinfo_dma_h;
2933
2934 raw_mbox[0] = FC_NEW_CONFIG;
2935 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
2936
2937 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
2938
2939 con_log(CL_ANN, (KERN_WARNING
2940 "megaraid: product info failed\n"));
2941
2942 dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t),
2943 pinfo, pinfo_dma_h);
2944
2945 return -1;
2946 }
2947
2948 /*
2949 * Setup some parameters for host, as required by our caller
2950 */
2951 adapter->max_channel = pinfo->nchannels;
2952
2953 /*
2954 * we will export all the logical drives on a single channel.
2955 * Add 1 since inquires do not come for inititor ID
2956 */
2957 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1;
2958 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices
2959
2960 /*
2961 * These are the maximum outstanding commands for the scsi-layer
2962 */
2963 adapter->max_cmds = MBOX_MAX_SCSI_CMDS;
2964
2965 memset(adapter->fw_version, 0, VERSION_SIZE);
2966 memset(adapter->bios_version, 0, VERSION_SIZE);
2967
2968 memcpy(adapter->fw_version, pinfo->fw_version, 4);
2969 adapter->fw_version[4] = 0;
2970
2971 memcpy(adapter->bios_version, pinfo->bios_version, 4);
2972 adapter->bios_version[4] = 0;
2973
2974 con_log(CL_ANN, (KERN_NOTICE
2975 "megaraid: fw version:[%s] bios version:[%s]\n",
2976 adapter->fw_version, adapter->bios_version));
2977
2978 dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), pinfo,
2979 pinfo_dma_h);
2980
2981 return 0;
2982 }
2983
2984
2985
2986 /**
2987 * megaraid_mbox_extended_cdb - check for support for extended CDBs
2988 * @adapter : soft state for the controller
2989 *
2990 * This routine check whether the controller in question supports extended
2991 * ( > 10 bytes ) CDBs.
2992 */
2993 static int
megaraid_mbox_extended_cdb(adapter_t * adapter)2994 megaraid_mbox_extended_cdb(adapter_t *adapter)
2995 {
2996 mbox_t *mbox;
2997 uint8_t raw_mbox[sizeof(mbox_t)];
2998 int rval;
2999
3000 mbox = (mbox_t *)raw_mbox;
3001
3002 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3003 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3004
3005 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3006
3007 raw_mbox[0] = MAIN_MISC_OPCODE;
3008 raw_mbox[2] = SUPPORT_EXT_CDB;
3009
3010 /*
3011 * Issue the command
3012 */
3013 rval = 0;
3014 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3015 rval = -1;
3016 }
3017
3018 return rval;
3019 }
3020
3021
3022 /**
3023 * megaraid_mbox_support_ha - Do we support clustering
3024 * @adapter : soft state for the controller
3025 * @init_id : ID of the initiator
3026 *
3027 * Determine if the firmware supports clustering and the ID of the initiator.
3028 */
3029 static int
megaraid_mbox_support_ha(adapter_t * adapter,uint16_t * init_id)3030 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3031 {
3032 mbox_t *mbox;
3033 uint8_t raw_mbox[sizeof(mbox_t)];
3034 int rval;
3035
3036
3037 mbox = (mbox_t *)raw_mbox;
3038
3039 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3040
3041 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3042
3043 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3044
3045 raw_mbox[0] = GET_TARGET_ID;
3046
3047 // Issue the command
3048 *init_id = 7;
3049 rval = -1;
3050 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3051
3052 *init_id = *(uint8_t *)adapter->ibuf;
3053
3054 con_log(CL_ANN, (KERN_INFO
3055 "megaraid: cluster firmware, initiator ID: %d\n",
3056 *init_id));
3057
3058 rval = 0;
3059 }
3060
3061 return rval;
3062 }
3063
3064
3065 /**
3066 * megaraid_mbox_support_random_del - Do we support random deletion
3067 * @adapter : soft state for the controller
3068 *
3069 * Determine if the firmware supports random deletion.
3070 * Return: 1 is operation supported, 0 otherwise
3071 */
3072 static int
megaraid_mbox_support_random_del(adapter_t * adapter)3073 megaraid_mbox_support_random_del(adapter_t *adapter)
3074 {
3075 uint8_t raw_mbox[sizeof(mbox_t)];
3076 int rval;
3077
3078 /*
3079 * Newer firmware on Dell CERC expect a different
3080 * random deletion handling, so disable it.
3081 */
3082 if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI &&
3083 adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 &&
3084 adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
3085 adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH &&
3086 (adapter->fw_version[0] > '6' ||
3087 (adapter->fw_version[0] == '6' &&
3088 adapter->fw_version[2] > '6') ||
3089 (adapter->fw_version[0] == '6'
3090 && adapter->fw_version[2] == '6'
3091 && adapter->fw_version[3] > '1'))) {
3092 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n"));
3093 return 0;
3094 }
3095
3096 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3097
3098 raw_mbox[0] = FC_DEL_LOGDRV;
3099 raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3100
3101 // Issue the command
3102 rval = 0;
3103 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3104
3105 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3106
3107 rval = 1;
3108 }
3109
3110 return rval;
3111 }
3112
3113
3114 /**
3115 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3116 * @adapter : soft state for the controller
3117 *
3118 * Find out the maximum number of scatter-gather elements supported by the
3119 * firmware.
3120 */
3121 static int
megaraid_mbox_get_max_sg(adapter_t * adapter)3122 megaraid_mbox_get_max_sg(adapter_t *adapter)
3123 {
3124 mbox_t *mbox;
3125 uint8_t raw_mbox[sizeof(mbox_t)];
3126 int nsg;
3127
3128
3129 mbox = (mbox_t *)raw_mbox;
3130
3131 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3132
3133 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3134
3135 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3136
3137 raw_mbox[0] = MAIN_MISC_OPCODE;
3138 raw_mbox[2] = GET_MAX_SG_SUPPORT;
3139
3140 // Issue the command
3141 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3142 nsg = *(uint8_t *)adapter->ibuf;
3143 }
3144 else {
3145 nsg = MBOX_DEFAULT_SG_SIZE;
3146 }
3147
3148 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3149
3150 return nsg;
3151 }
3152
3153
3154 /**
3155 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3156 * @adapter : soft state for the controller
3157 *
3158 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3159 * can be exported as regular SCSI channels.
3160 */
3161 static void
megaraid_mbox_enum_raid_scsi(adapter_t * adapter)3162 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3163 {
3164 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3165 mbox_t *mbox;
3166 uint8_t raw_mbox[sizeof(mbox_t)];
3167
3168
3169 mbox = (mbox_t *)raw_mbox;
3170
3171 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3172
3173 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3174
3175 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3176
3177 raw_mbox[0] = CHNL_CLASS;
3178 raw_mbox[2] = GET_CHNL_CLASS;
3179
3180 // Issue the command. If the command fails, all channels are RAID
3181 // channels
3182 raid_dev->channel_class = 0xFF;
3183 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3184 raid_dev->channel_class = *(uint8_t *)adapter->ibuf;
3185 }
3186
3187 return;
3188 }
3189
3190
3191 /**
3192 * megaraid_mbox_flush_cache - flush adapter and disks cache
3193 * @adapter : soft state for the controller
3194 *
3195 * Flush adapter cache followed by disks cache.
3196 */
3197 static void
megaraid_mbox_flush_cache(adapter_t * adapter)3198 megaraid_mbox_flush_cache(adapter_t *adapter)
3199 {
3200 uint8_t raw_mbox[sizeof(mbox_t)];
3201
3202 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3203
3204 raw_mbox[0] = FLUSH_ADAPTER;
3205
3206 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3207 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3208 }
3209
3210 raw_mbox[0] = FLUSH_SYSTEM;
3211
3212 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3213 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3214 }
3215
3216 return;
3217 }
3218
3219
3220 /**
3221 * megaraid_mbox_fire_sync_cmd - fire the sync cmd
3222 * @adapter : soft state for the controller
3223 *
3224 * Clears the pending cmds in FW and reinits its RAID structs.
3225 */
3226 static int
megaraid_mbox_fire_sync_cmd(adapter_t * adapter)3227 megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3228 {
3229 mbox_t *mbox;
3230 uint8_t raw_mbox[sizeof(mbox_t)];
3231 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3232 int status = 0;
3233 int i;
3234 uint32_t dword;
3235
3236 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3237
3238 raw_mbox[0] = 0xFF;
3239
3240 mbox = raid_dev->mbox;
3241
3242 /* Wait until mailbox is free */
3243 if (megaraid_busywait_mbox(raid_dev) != 0) {
3244 status = 1;
3245 goto blocked_mailbox;
3246 }
3247
3248 /* Copy mailbox data into host structure */
3249 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3250 mbox->cmdid = 0xFE;
3251 mbox->busy = 1;
3252 mbox->poll = 0;
3253 mbox->ack = 0;
3254 mbox->numstatus = 0;
3255 mbox->status = 0;
3256
3257 wmb();
3258 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3259
3260 /* Wait for maximum 1 min for status to post.
3261 * If the Firmware SUPPORTS the ABOVE COMMAND,
3262 * mbox->cmd will be set to 0
3263 * else
3264 * the firmware will reject the command with
3265 * mbox->numstatus set to 1
3266 */
3267
3268 i = 0;
3269 status = 0;
3270 while (!mbox->numstatus && mbox->cmd == 0xFF) {
3271 rmb();
3272 msleep(1);
3273 i++;
3274 if (i > 1000 * 60) {
3275 status = 1;
3276 break;
3277 }
3278 }
3279 if (mbox->numstatus == 1)
3280 status = 1; /*cmd not supported*/
3281
3282 /* Check for interrupt line */
3283 dword = RDOUTDOOR(raid_dev);
3284 WROUTDOOR(raid_dev, dword);
3285 WRINDOOR(raid_dev,2);
3286
3287 return status;
3288
3289 blocked_mailbox:
3290 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3291 return status;
3292 }
3293
3294 /**
3295 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3296 * @adapter : controller's soft state
3297 * @scb : SCB to be displayed
3298 *
3299 * Diplay information about the given SCB iff the current debug level is
3300 * verbose.
3301 */
3302 static void
megaraid_mbox_display_scb(adapter_t * adapter,scb_t * scb)3303 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3304 {
3305 mbox_ccb_t *ccb;
3306 struct scsi_cmnd *scp;
3307 mbox_t *mbox;
3308 int level;
3309 int i;
3310
3311
3312 ccb = (mbox_ccb_t *)scb->ccb;
3313 scp = scb->scp;
3314 mbox = ccb->mbox;
3315
3316 level = CL_DLEVEL3;
3317
3318 con_log(level, (KERN_NOTICE
3319 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3320 mbox->cmd, scb->sno));
3321
3322 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3323 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3324 mbox->numsge));
3325
3326 if (!scp) return;
3327
3328 con_log(level, (KERN_NOTICE "scsi cmnd: "));
3329
3330 for (i = 0; i < scp->cmd_len; i++) {
3331 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3332 }
3333
3334 con_log(level, ("\n"));
3335
3336 return;
3337 }
3338
3339
3340 /**
3341 * megaraid_mbox_setup_device_map - manage device ids
3342 * @adapter : Driver's soft state
3343 *
3344 * Manage the device ids to have an appropriate mapping between the kernel
3345 * scsi addresses and megaraid scsi and logical drive addresses. We export
3346 * scsi devices on their actual addresses, whereas the logical drives are
3347 * exported on a virtual scsi channel.
3348 */
3349 static void
megaraid_mbox_setup_device_map(adapter_t * adapter)3350 megaraid_mbox_setup_device_map(adapter_t *adapter)
3351 {
3352 uint8_t c;
3353 uint8_t t;
3354
3355 /*
3356 * First fill the values on the logical drive channel
3357 */
3358 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3359 adapter->device_ids[adapter->max_channel][t] =
3360 (t < adapter->init_id) ? t : t - 1;
3361
3362 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3363
3364 /*
3365 * Fill the values on the physical devices channels
3366 */
3367 for (c = 0; c < adapter->max_channel; c++)
3368 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3369 adapter->device_ids[c][t] = (c << 8) | t;
3370 }
3371
3372
3373 /*
3374 * END: internal commands library
3375 */
3376
3377 /*
3378 * START: Interface for the common management module
3379 *
3380 * This is the module, which interfaces with the common management module to
3381 * provide support for ioctl and sysfs
3382 */
3383
3384 /**
3385 * megaraid_cmm_register - register with the management module
3386 * @adapter : HBA soft state
3387 *
3388 * Register with the management module, which allows applications to issue
3389 * ioctl calls to the drivers. This interface is used by the management module
3390 * to setup sysfs support as well.
3391 */
3392 static int
megaraid_cmm_register(adapter_t * adapter)3393 megaraid_cmm_register(adapter_t *adapter)
3394 {
3395 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3396 mraid_mmadp_t adp;
3397 scb_t *scb;
3398 mbox_ccb_t *ccb;
3399 int rval;
3400 int i;
3401
3402 // Allocate memory for the base list of scb for management module.
3403 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL);
3404
3405 if (adapter->uscb_list == NULL) {
3406 con_log(CL_ANN, (KERN_WARNING
3407 "megaraid: out of memory, %s %d\n", __func__,
3408 __LINE__));
3409 return -1;
3410 }
3411
3412
3413 // Initialize the synchronization parameters for resources for
3414 // commands for management module
3415 INIT_LIST_HEAD(&adapter->uscb_pool);
3416
3417 spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3418
3419
3420
3421 // link all the packets. Note, CCB for commands, coming from the
3422 // commom management module, mailbox physical address are already
3423 // setup by it. We just need placeholder for that in our local command
3424 // control blocks
3425 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3426
3427 scb = adapter->uscb_list + i;
3428 ccb = raid_dev->uccb_list + i;
3429
3430 scb->ccb = (caddr_t)ccb;
3431 ccb->mbox64 = raid_dev->umbox64 + i;
3432 ccb->mbox = &ccb->mbox64->mbox32;
3433 ccb->raw_mbox = (uint8_t *)ccb->mbox;
3434
3435 scb->gp = 0;
3436
3437 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3438 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3439 scb->sno = i + MBOX_MAX_SCSI_CMDS;
3440
3441 scb->scp = NULL;
3442 scb->state = SCB_FREE;
3443 scb->dma_direction = DMA_NONE;
3444 scb->dma_type = MRAID_DMA_NONE;
3445 scb->dev_channel = -1;
3446 scb->dev_target = -1;
3447
3448 // put scb in the free pool
3449 list_add_tail(&scb->list, &adapter->uscb_pool);
3450 }
3451
3452 adp.unique_id = adapter->unique_id;
3453 adp.drvr_type = DRVRTYPE_MBOX;
3454 adp.drvr_data = (unsigned long)adapter;
3455 adp.pdev = adapter->pdev;
3456 adp.issue_uioc = megaraid_mbox_mm_handler;
3457 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
3458 adp.max_kioc = MBOX_MAX_USER_CMDS;
3459
3460 if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3461
3462 con_log(CL_ANN, (KERN_WARNING
3463 "megaraid mbox: did not register with CMM\n"));
3464
3465 kfree(adapter->uscb_list);
3466 }
3467
3468 return rval;
3469 }
3470
3471
3472 /**
3473 * megaraid_cmm_unregister - un-register with the management module
3474 * @adapter : HBA soft state
3475 *
3476 * Un-register with the management module.
3477 * FIXME: mgmt module must return failure for unregister if it has pending
3478 * commands in LLD.
3479 */
3480 static int
megaraid_cmm_unregister(adapter_t * adapter)3481 megaraid_cmm_unregister(adapter_t *adapter)
3482 {
3483 kfree(adapter->uscb_list);
3484 mraid_mm_unregister_adp(adapter->unique_id);
3485 return 0;
3486 }
3487
3488
3489 /**
3490 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3491 * @drvr_data : LLD specific data
3492 * @kioc : CMM interface packet
3493 * @action : command action
3494 *
3495 * This routine is invoked whenever the Common Management Module (CMM) has a
3496 * command for us. The 'action' parameter specifies if this is a new command
3497 * or otherwise.
3498 */
3499 static int
megaraid_mbox_mm_handler(unsigned long drvr_data,uioc_t * kioc,uint32_t action)3500 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3501 {
3502 adapter_t *adapter;
3503
3504 if (action != IOCTL_ISSUE) {
3505 con_log(CL_ANN, (KERN_WARNING
3506 "megaraid: unsupported management action:%#2x\n",
3507 action));
3508 return (-ENOTSUPP);
3509 }
3510
3511 adapter = (adapter_t *)drvr_data;
3512
3513 // make sure this adapter is not being detached right now.
3514 if (atomic_read(&adapter->being_detached)) {
3515 con_log(CL_ANN, (KERN_WARNING
3516 "megaraid: reject management request, detaching\n"));
3517 return (-ENODEV);
3518 }
3519
3520 switch (kioc->opcode) {
3521
3522 case GET_ADAP_INFO:
3523
3524 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *)
3525 (unsigned long)kioc->buf_vaddr);
3526
3527 kioc->done(kioc);
3528
3529 return kioc->status;
3530
3531 case MBOX_CMD:
3532
3533 return megaraid_mbox_mm_command(adapter, kioc);
3534
3535 default:
3536 kioc->status = (-EINVAL);
3537 kioc->done(kioc);
3538 return (-EINVAL);
3539 }
3540
3541 return 0; // not reached
3542 }
3543
3544 /**
3545 * megaraid_mbox_mm_command - issues commands routed through CMM
3546 * @adapter : HBA soft state
3547 * @kioc : management command packet
3548 *
3549 * Issues commands, which are routed through the management module.
3550 */
3551 static int
megaraid_mbox_mm_command(adapter_t * adapter,uioc_t * kioc)3552 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3553 {
3554 struct list_head *head = &adapter->uscb_pool;
3555 mbox64_t *mbox64;
3556 uint8_t *raw_mbox;
3557 scb_t *scb;
3558 mbox_ccb_t *ccb;
3559 unsigned long flags;
3560
3561 // detach one scb from free pool
3562 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3563
3564 if (list_empty(head)) { // should never happen because of CMM
3565
3566 con_log(CL_ANN, (KERN_WARNING
3567 "megaraid mbox: bug in cmm handler, lost resources\n"));
3568
3569 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3570
3571 return (-EINVAL);
3572 }
3573
3574 scb = list_entry(head->next, scb_t, list);
3575 list_del_init(&scb->list);
3576
3577 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3578
3579 scb->state = SCB_ACTIVE;
3580 scb->dma_type = MRAID_DMA_NONE;
3581 scb->dma_direction = DMA_NONE;
3582
3583 ccb = (mbox_ccb_t *)scb->ccb;
3584 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3585 raw_mbox = (uint8_t *)&mbox64->mbox32;
3586
3587 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3588
3589 scb->gp = (unsigned long)kioc;
3590
3591 /*
3592 * If it is a logdrv random delete operation, we have to wait till
3593 * there are no outstanding cmds at the fw and then issue it directly
3594 */
3595 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3596
3597 if (wait_till_fw_empty(adapter)) {
3598 con_log(CL_ANN, (KERN_NOTICE
3599 "megaraid mbox: LD delete, timed out\n"));
3600
3601 kioc->status = -ETIME;
3602
3603 scb->status = -1;
3604
3605 megaraid_mbox_mm_done(adapter, scb);
3606
3607 return (-ETIME);
3608 }
3609
3610 INIT_LIST_HEAD(&scb->list);
3611
3612 scb->state = SCB_ISSUED;
3613 if (mbox_post_cmd(adapter, scb) != 0) {
3614
3615 con_log(CL_ANN, (KERN_NOTICE
3616 "megaraid mbox: LD delete, mailbox busy\n"));
3617
3618 kioc->status = -EBUSY;
3619
3620 scb->status = -1;
3621
3622 megaraid_mbox_mm_done(adapter, scb);
3623
3624 return (-EBUSY);
3625 }
3626
3627 return 0;
3628 }
3629
3630 // put the command on the pending list and execute
3631 megaraid_mbox_runpendq(adapter, scb);
3632
3633 return 0;
3634 }
3635
3636
3637 static int
wait_till_fw_empty(adapter_t * adapter)3638 wait_till_fw_empty(adapter_t *adapter)
3639 {
3640 unsigned long flags = 0;
3641 int i;
3642
3643
3644 /*
3645 * Set the quiescent flag to stop issuing cmds to FW.
3646 */
3647 spin_lock_irqsave(&adapter->lock, flags);
3648 adapter->quiescent++;
3649 spin_unlock_irqrestore(&adapter->lock, flags);
3650
3651 /*
3652 * Wait till there are no more cmds outstanding at FW. Try for at most
3653 * 60 seconds
3654 */
3655 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3656 con_log(CL_DLEVEL1, (KERN_INFO
3657 "megaraid: FW has %d pending commands\n",
3658 adapter->outstanding_cmds));
3659
3660 msleep(1000);
3661 }
3662
3663 return adapter->outstanding_cmds;
3664 }
3665
3666
3667 /**
3668 * megaraid_mbox_mm_done - callback for CMM commands
3669 * @adapter : HBA soft state
3670 * @scb : completed command
3671 *
3672 * Callback routine for internal commands originated from the management
3673 * module.
3674 */
3675 static void
megaraid_mbox_mm_done(adapter_t * adapter,scb_t * scb)3676 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3677 {
3678 uioc_t *kioc;
3679 mbox64_t *mbox64;
3680 uint8_t *raw_mbox;
3681 unsigned long flags;
3682
3683 kioc = (uioc_t *)scb->gp;
3684 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3685 mbox64->mbox32.status = scb->status;
3686 raw_mbox = (uint8_t *)&mbox64->mbox32;
3687
3688
3689 // put scb in the free pool
3690 scb->state = SCB_FREE;
3691 scb->scp = NULL;
3692
3693 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3694
3695 list_add(&scb->list, &adapter->uscb_pool);
3696
3697 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3698
3699 // if a delete logical drive operation succeeded, restart the
3700 // controller
3701 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3702
3703 adapter->quiescent--;
3704
3705 megaraid_mbox_runpendq(adapter, NULL);
3706 }
3707
3708 kioc->done(kioc);
3709
3710 return;
3711 }
3712
3713
3714 /**
3715 * gather_hbainfo - HBA characteristics for the applications
3716 * @adapter : HBA soft state
3717 * @hinfo : pointer to the caller's host info strucuture
3718 */
3719 static int
gather_hbainfo(adapter_t * adapter,mraid_hba_info_t * hinfo)3720 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3721 {
3722 hinfo->pci_vendor_id = adapter->pdev->vendor;
3723 hinfo->pci_device_id = adapter->pdev->device;
3724 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3725 hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3726
3727 hinfo->pci_bus = adapter->pdev->bus->number;
3728 hinfo->pci_dev_fn = adapter->pdev->devfn;
3729 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn);
3730 hinfo->irq = adapter->host->irq;
3731 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport;
3732
3733 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3734 hinfo->host_no = adapter->host->host_no;
3735
3736 return 0;
3737 }
3738
3739 /*
3740 * END: Interface for the common management module
3741 */
3742
3743
3744
3745 /**
3746 * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3747 * @adapter : controller's soft state
3748 *
3749 * Allocate packets required to issue FW calls whenever the sysfs attributes
3750 * are read. These attributes would require up-to-date information from the
3751 * FW. Also set up resources for mutual exclusion to share these resources and
3752 * the wait queue.
3753 *
3754 * Return 0 on success.
3755 * Return -ERROR_CODE on failure.
3756 */
3757 static int
megaraid_sysfs_alloc_resources(adapter_t * adapter)3758 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3759 {
3760 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3761 int rval = 0;
3762
3763 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3764
3765 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3766
3767 raid_dev->sysfs_buffer = dma_alloc_coherent(&adapter->pdev->dev,
3768 PAGE_SIZE, &raid_dev->sysfs_buffer_dma, GFP_KERNEL);
3769
3770 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3771 !raid_dev->sysfs_buffer) {
3772
3773 con_log(CL_ANN, (KERN_WARNING
3774 "megaraid: out of memory, %s %d\n", __func__,
3775 __LINE__));
3776
3777 rval = -ENOMEM;
3778
3779 megaraid_sysfs_free_resources(adapter);
3780 }
3781
3782 mutex_init(&raid_dev->sysfs_mtx);
3783
3784 init_waitqueue_head(&raid_dev->sysfs_wait_q);
3785
3786 return rval;
3787 }
3788
3789
3790 /**
3791 * megaraid_sysfs_free_resources - free sysfs related resources
3792 * @adapter : controller's soft state
3793 *
3794 * Free packets allocated for sysfs FW commands
3795 */
3796 static void
megaraid_sysfs_free_resources(adapter_t * adapter)3797 megaraid_sysfs_free_resources(adapter_t *adapter)
3798 {
3799 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3800
3801 kfree(raid_dev->sysfs_uioc);
3802 kfree(raid_dev->sysfs_mbox64);
3803
3804 if (raid_dev->sysfs_buffer) {
3805 dma_free_coherent(&adapter->pdev->dev, PAGE_SIZE,
3806 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3807 }
3808 }
3809
3810
3811 /**
3812 * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3813 * @uioc : completed packet
3814 *
3815 * Callback routine called in the ISR/tasklet context for get ldmap call
3816 */
3817 static void
megaraid_sysfs_get_ldmap_done(uioc_t * uioc)3818 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3819 {
3820 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3821 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3822
3823 uioc->status = 0;
3824
3825 wake_up(&raid_dev->sysfs_wait_q);
3826 }
3827
3828 /**
3829 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3830 * @t : timed out timer
3831 *
3832 * Timeout routine to recover and return to application, in case the adapter
3833 * has stopped responding. A timeout of 60 seconds for this command seems like
3834 * a good value.
3835 */
3836 static void
megaraid_sysfs_get_ldmap_timeout(struct timer_list * t)3837 megaraid_sysfs_get_ldmap_timeout(struct timer_list *t)
3838 {
3839 struct uioc_timeout *timeout = from_timer(timeout, t, timer);
3840 uioc_t *uioc = timeout->uioc;
3841 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3842 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3843
3844 uioc->status = -ETIME;
3845
3846 wake_up(&raid_dev->sysfs_wait_q);
3847 }
3848
3849
3850 /**
3851 * megaraid_sysfs_get_ldmap - get update logical drive map
3852 * @adapter : controller's soft state
3853 *
3854 * This routine will be called whenever user reads the logical drive
3855 * attributes, go get the current logical drive mapping table from the
3856 * firmware. We use the management API's to issue commands to the controller.
3857 *
3858 * NOTE: The commands issuance functionality is not generalized and
3859 * implemented in context of "get ld map" command only. If required, the
3860 * command issuance logical can be trivially pulled out and implemented as a
3861 * standalone library. For now, this should suffice since there is no other
3862 * user of this interface.
3863 *
3864 * Return 0 on success.
3865 * Return -1 on failure.
3866 */
3867 static int
megaraid_sysfs_get_ldmap(adapter_t * adapter)3868 megaraid_sysfs_get_ldmap(adapter_t *adapter)
3869 {
3870 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3871 uioc_t *uioc;
3872 mbox64_t *mbox64;
3873 mbox_t *mbox;
3874 char *raw_mbox;
3875 struct uioc_timeout timeout;
3876 caddr_t ldmap;
3877 int rval = 0;
3878
3879 /*
3880 * Allow only one read at a time to go through the sysfs attributes
3881 */
3882 mutex_lock(&raid_dev->sysfs_mtx);
3883
3884 uioc = raid_dev->sysfs_uioc;
3885 mbox64 = raid_dev->sysfs_mbox64;
3886 ldmap = raid_dev->sysfs_buffer;
3887
3888 memset(uioc, 0, sizeof(uioc_t));
3889 memset(mbox64, 0, sizeof(mbox64_t));
3890 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
3891
3892 mbox = &mbox64->mbox32;
3893 raw_mbox = (char *)mbox;
3894 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64;
3895 uioc->buf_vaddr = (caddr_t)adapter;
3896 uioc->status = -ENODATA;
3897 uioc->done = megaraid_sysfs_get_ldmap_done;
3898
3899 /*
3900 * Prepare the mailbox packet to get the current logical drive mapping
3901 * table
3902 */
3903 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
3904
3905 raw_mbox[0] = FC_DEL_LOGDRV;
3906 raw_mbox[2] = OP_GET_LDID_MAP;
3907
3908 /*
3909 * Setup a timer to recover from a non-responding controller
3910 */
3911 timeout.uioc = uioc;
3912 timer_setup_on_stack(&timeout.timer,
3913 megaraid_sysfs_get_ldmap_timeout, 0);
3914
3915 timeout.timer.expires = jiffies + 60 * HZ;
3916 add_timer(&timeout.timer);
3917
3918 /*
3919 * Send the command to the firmware
3920 */
3921 rval = megaraid_mbox_mm_command(adapter, uioc);
3922
3923 if (rval == 0) { // command successfully issued
3924 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
3925
3926 /*
3927 * Check if the command timed out
3928 */
3929 if (uioc->status == -ETIME) {
3930 con_log(CL_ANN, (KERN_NOTICE
3931 "megaraid: sysfs get ld map timed out\n"));
3932
3933 rval = -ETIME;
3934 }
3935 else {
3936 rval = mbox->status;
3937 }
3938
3939 if (rval == 0) {
3940 memcpy(raid_dev->curr_ldmap, ldmap,
3941 sizeof(raid_dev->curr_ldmap));
3942 }
3943 else {
3944 con_log(CL_ANN, (KERN_NOTICE
3945 "megaraid: get ld map failed with %x\n", rval));
3946 }
3947 }
3948 else {
3949 con_log(CL_ANN, (KERN_NOTICE
3950 "megaraid: could not issue ldmap command:%x\n", rval));
3951 }
3952
3953
3954 del_timer_sync(&timeout.timer);
3955 destroy_timer_on_stack(&timeout.timer);
3956
3957 mutex_unlock(&raid_dev->sysfs_mtx);
3958
3959 return rval;
3960 }
3961
3962
3963 /**
3964 * megaraid_mbox_app_hndl_show - display application handle for this adapter
3965 * @dev : class device object representation for the host
3966 * @attr : device attribute (unused)
3967 * @buf : buffer to send data to
3968 *
3969 * Display the handle used by the applications while executing management
3970 * tasks on the adapter. We invoke a management module API to get the adapter
3971 * handle, since we do not interface with applications directly.
3972 */
3973 static ssize_t
megaraid_mbox_app_hndl_show(struct device * dev,struct device_attribute * attr,char * buf)3974 megaraid_mbox_app_hndl_show(struct device *dev, struct device_attribute *attr, char *buf)
3975 {
3976 struct Scsi_Host *shost = class_to_shost(dev);
3977 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
3978 uint32_t app_hndl;
3979
3980 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
3981
3982 return sysfs_emit(buf, "%u\n", app_hndl);
3983 }
3984
3985
3986 /**
3987 * megaraid_mbox_ld_show - display the logical drive number for this device
3988 * @dev : device object representation for the scsi device
3989 * @attr : device attribute to show
3990 * @buf : buffer to send data to
3991 *
3992 * Display the logical drive number for the device in question, if it a valid
3993 * logical drive. For physical devices, "-1" is returned.
3994 *
3995 * The logical drive number is displayed in following format:
3996 *
3997 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
3998 *
3999 * <int> <int> <int> <int>
4000 */
4001 static ssize_t
megaraid_mbox_ld_show(struct device * dev,struct device_attribute * attr,char * buf)4002 megaraid_mbox_ld_show(struct device *dev, struct device_attribute *attr, char *buf)
4003 {
4004 struct scsi_device *sdev = to_scsi_device(dev);
4005 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4006 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4007 int scsi_id = -1;
4008 int logical_drv = -1;
4009 int ldid_map = -1;
4010 uint32_t app_hndl = 0;
4011 int mapped_sdev_id;
4012 int rval;
4013 int i;
4014
4015 if (raid_dev->random_del_supported &&
4016 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4017
4018 rval = megaraid_sysfs_get_ldmap(adapter);
4019 if (rval == 0) {
4020
4021 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4022
4023 mapped_sdev_id = sdev->id;
4024
4025 if (sdev->id > adapter->init_id) {
4026 mapped_sdev_id -= 1;
4027 }
4028
4029 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4030
4031 scsi_id = sdev->id;
4032
4033 logical_drv = i;
4034
4035 ldid_map = raid_dev->curr_ldmap[i];
4036
4037 app_hndl = mraid_mm_adapter_app_handle(
4038 adapter->unique_id);
4039
4040 break;
4041 }
4042 }
4043 }
4044 else {
4045 con_log(CL_ANN, (KERN_NOTICE
4046 "megaraid: sysfs get ld map failed: %x\n",
4047 rval));
4048 }
4049 }
4050
4051 return sysfs_emit(buf, "%d %d %d %d\n", scsi_id, logical_drv,
4052 ldid_map, app_hndl);
4053 }
4054
4055
4056 /*
4057 * END: Mailbox Low Level Driver
4058 */
4059 module_init(megaraid_init);
4060 module_exit(megaraid_exit);
4061