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 enum scsi_qc_status megaraid_queue_command(struct Scsi_Host *,
113 struct scsi_cmnd *);
114 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *,
115 enum scsi_qc_status *);
116 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
117 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
118 struct scsi_cmnd *);
119 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
120 struct scsi_cmnd *);
121
122 static irqreturn_t megaraid_isr(int, void *);
123
124 static void megaraid_mbox_dpc(unsigned long);
125
126 static ssize_t megaraid_mbox_app_hndl_show(struct device *, struct device_attribute *attr, char *);
127 static ssize_t megaraid_mbox_ld_show(struct device *, struct device_attribute *attr, char *);
128
129 static int megaraid_cmm_register(adapter_t *);
130 static int megaraid_cmm_unregister(adapter_t *);
131 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
132 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
133 static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
134 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
135 static int wait_till_fw_empty(adapter_t *);
136
137
138
139 MODULE_AUTHOR("megaraidlinux@lsi.com");
140 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
141 MODULE_LICENSE("GPL");
142 MODULE_VERSION(MEGARAID_VERSION);
143
144 /*
145 * ### modules parameters for driver ###
146 */
147
148 /*
149 * Set to enable driver to expose unconfigured disk to kernel
150 */
151 static int megaraid_expose_unconf_disks = 0;
152 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
153 MODULE_PARM_DESC(unconf_disks,
154 "Set to expose unconfigured disks to kernel (default=0)");
155
156 /*
157 * driver wait time if the adapter's mailbox is busy
158 */
159 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
160 module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
161 MODULE_PARM_DESC(busy_wait,
162 "Max wait for mailbox in microseconds if busy (default=10)");
163
164 /*
165 * number of sectors per IO command
166 */
167 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
168 module_param_named(max_sectors, megaraid_max_sectors, int, 0);
169 MODULE_PARM_DESC(max_sectors,
170 "Maximum number of sectors per IO command (default=128)");
171
172 /*
173 * number of commands per logical unit
174 */
175 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
176 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
177 MODULE_PARM_DESC(cmd_per_lun,
178 "Maximum number of commands per logical unit (default=64)");
179
180
181 /*
182 * Fast driver load option, skip scanning for physical devices during load.
183 * This would result in non-disk devices being skipped during driver load
184 * time. These can be later added though, using /proc/scsi/scsi
185 */
186 static unsigned int megaraid_fast_load;
187 module_param_named(fast_load, megaraid_fast_load, int, 0);
188 MODULE_PARM_DESC(fast_load,
189 "Faster loading of the driver, skips physical devices! (default=0)");
190
191
192 /*
193 * mraid_debug level - threshold for amount of information to be displayed by
194 * the driver. This level can be changed through modules parameters, ioctl or
195 * sysfs/proc interface. By default, print the announcement messages only.
196 */
197 int mraid_debug_level = CL_ANN;
198 module_param_named(debug_level, mraid_debug_level, int, 0);
199 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
200
201 /*
202 * PCI table for all supported controllers.
203 */
204 static const struct pci_device_id pci_id_table_g[] = {
205 {
206 PCI_VENDOR_ID_DELL,
207 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
208 PCI_VENDOR_ID_DELL,
209 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
210 },
211 {
212 PCI_VENDOR_ID_LSI_LOGIC,
213 PCI_DEVICE_ID_PERC4_SC,
214 PCI_VENDOR_ID_DELL,
215 PCI_SUBSYS_ID_PERC4_SC,
216 },
217 {
218 PCI_VENDOR_ID_LSI_LOGIC,
219 PCI_DEVICE_ID_PERC4_DC,
220 PCI_VENDOR_ID_DELL,
221 PCI_SUBSYS_ID_PERC4_DC,
222 },
223 {
224 PCI_VENDOR_ID_LSI_LOGIC,
225 PCI_DEVICE_ID_VERDE,
226 PCI_ANY_ID,
227 PCI_ANY_ID,
228 },
229 {
230 PCI_VENDOR_ID_DELL,
231 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
232 PCI_VENDOR_ID_DELL,
233 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
234 },
235 {
236 PCI_VENDOR_ID_DELL,
237 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
238 PCI_VENDOR_ID_DELL,
239 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
240 },
241 {
242 PCI_VENDOR_ID_DELL,
243 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
244 PCI_VENDOR_ID_DELL,
245 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
246 },
247 {
248 PCI_VENDOR_ID_DELL,
249 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
250 PCI_VENDOR_ID_DELL,
251 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
252 },
253 {
254 PCI_VENDOR_ID_DELL,
255 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
256 PCI_VENDOR_ID_DELL,
257 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
258 },
259 {
260 PCI_VENDOR_ID_DELL,
261 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
262 PCI_VENDOR_ID_DELL,
263 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
264 },
265 {
266 PCI_VENDOR_ID_LSI_LOGIC,
267 PCI_DEVICE_ID_DOBSON,
268 PCI_ANY_ID,
269 PCI_ANY_ID,
270 },
271 {
272 PCI_VENDOR_ID_AMI,
273 PCI_DEVICE_ID_AMI_MEGARAID3,
274 PCI_ANY_ID,
275 PCI_ANY_ID,
276 },
277 {
278 PCI_VENDOR_ID_LSI_LOGIC,
279 PCI_DEVICE_ID_AMI_MEGARAID3,
280 PCI_ANY_ID,
281 PCI_ANY_ID,
282 },
283 {
284 PCI_VENDOR_ID_LSI_LOGIC,
285 PCI_DEVICE_ID_LINDSAY,
286 PCI_ANY_ID,
287 PCI_ANY_ID,
288 },
289 {0} /* Terminating entry */
290 };
291 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
292
293
294 static struct pci_driver megaraid_pci_driver = {
295 .name = "megaraid",
296 .id_table = pci_id_table_g,
297 .probe = megaraid_probe_one,
298 .remove = megaraid_detach_one,
299 .shutdown = megaraid_mbox_shutdown,
300 };
301
302
303
304 // definitions for the device attributes for exporting logical drive number
305 // for a scsi address (Host, Channel, Id, Lun)
306
307 static DEVICE_ATTR_ADMIN_RO(megaraid_mbox_app_hndl);
308
309 // Host template initializer for megaraid mbox sysfs device attributes
310 static struct attribute *megaraid_shost_attrs[] = {
311 &dev_attr_megaraid_mbox_app_hndl.attr,
312 NULL,
313 };
314
315 ATTRIBUTE_GROUPS(megaraid_shost);
316
317 static DEVICE_ATTR_ADMIN_RO(megaraid_mbox_ld);
318
319 // Host template initializer for megaraid mbox sysfs device attributes
320 static struct attribute *megaraid_sdev_attrs[] = {
321 &dev_attr_megaraid_mbox_ld.attr,
322 NULL,
323 };
324
325 ATTRIBUTE_GROUPS(megaraid_sdev);
326
327 /*
328 * Scsi host template for megaraid unified driver
329 */
330 static const struct scsi_host_template megaraid_template_g = {
331 .module = THIS_MODULE,
332 .name = "LSI Logic MegaRAID driver",
333 .proc_name = "megaraid",
334 .queuecommand = megaraid_queue_command,
335 .eh_abort_handler = megaraid_abort_handler,
336 .eh_host_reset_handler = megaraid_reset_handler,
337 .change_queue_depth = scsi_change_queue_depth,
338 .no_write_same = 1,
339 .sdev_groups = megaraid_sdev_groups,
340 .shost_groups = megaraid_shost_groups,
341 };
342
343
344 /**
345 * megaraid_init - module load hook
346 *
347 * We register ourselves as hotplug enabled module and let PCI subsystem
348 * discover our adapters.
349 */
350 static int __init
megaraid_init(void)351 megaraid_init(void)
352 {
353 int rval;
354
355 // Announce the driver version
356 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
357 MEGARAID_EXT_VERSION));
358
359 // check validity of module parameters
360 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
361
362 con_log(CL_ANN, (KERN_WARNING
363 "megaraid mailbox: max commands per lun reset to %d\n",
364 MBOX_MAX_SCSI_CMDS));
365
366 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
367 }
368
369
370 // register as a PCI hot-plug driver module
371 rval = pci_register_driver(&megaraid_pci_driver);
372 if (rval < 0) {
373 con_log(CL_ANN, (KERN_WARNING
374 "megaraid: could not register hotplug support.\n"));
375 }
376
377 return rval;
378 }
379
380
381 /**
382 * megaraid_exit - driver unload entry point
383 *
384 * We simply unwrap the megaraid_init routine here.
385 */
386 static void __exit
megaraid_exit(void)387 megaraid_exit(void)
388 {
389 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
390
391 // unregister as PCI hotplug driver
392 pci_unregister_driver(&megaraid_pci_driver);
393
394 return;
395 }
396
397
398 /**
399 * megaraid_probe_one - PCI hotplug entry point
400 * @pdev : handle to this controller's PCI configuration space
401 * @id : pci device id of the class of controllers
402 *
403 * This routine should be called whenever a new adapter is detected by the
404 * PCI hotplug susbsystem.
405 */
406 static int
megaraid_probe_one(struct pci_dev * pdev,const struct pci_device_id * id)407 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
408 {
409 adapter_t *adapter;
410
411
412 // detected a new controller
413 con_log(CL_ANN, (KERN_INFO
414 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
415 pdev->vendor, pdev->device, pdev->subsystem_vendor,
416 pdev->subsystem_device));
417
418 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
419 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
420
421 if (pci_enable_device(pdev)) {
422 con_log(CL_ANN, (KERN_WARNING
423 "megaraid: pci_enable_device failed\n"));
424
425 return -ENODEV;
426 }
427
428 // Enable bus-mastering on this controller
429 pci_set_master(pdev);
430
431 // Allocate the per driver initialization structure
432 adapter = kzalloc_obj(adapter_t);
433
434 if (adapter == NULL) {
435 con_log(CL_ANN, (KERN_WARNING
436 "megaraid: out of memory, %s %d.\n", __func__, __LINE__));
437
438 goto out_probe_one;
439 }
440
441
442 // set up PCI related soft state and other pre-known parameters
443 adapter->unique_id = pci_dev_id(pdev);
444 adapter->irq = pdev->irq;
445 adapter->pdev = pdev;
446
447 atomic_set(&adapter->being_detached, 0);
448
449 // Setup the default DMA mask. This would be changed later on
450 // depending on hardware capabilities
451 if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(32))) {
452 con_log(CL_ANN, (KERN_WARNING
453 "megaraid: dma_set_mask failed:%d\n", __LINE__));
454
455 goto out_free_adapter;
456 }
457
458
459 // Initialize the synchronization lock for kernel and LLD
460 spin_lock_init(&adapter->lock);
461
462 // Initialize the command queues: the list of free SCBs and the list
463 // of pending SCBs.
464 INIT_LIST_HEAD(&adapter->kscb_pool);
465 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
466
467 INIT_LIST_HEAD(&adapter->pend_list);
468 spin_lock_init(PENDING_LIST_LOCK(adapter));
469
470 INIT_LIST_HEAD(&adapter->completed_list);
471 spin_lock_init(COMPLETED_LIST_LOCK(adapter));
472
473
474 // Start the mailbox based controller
475 if (megaraid_init_mbox(adapter) != 0) {
476 con_log(CL_ANN, (KERN_WARNING
477 "megaraid: mailbox adapter did not initialize\n"));
478
479 goto out_free_adapter;
480 }
481
482 // Register with LSI Common Management Module
483 if (megaraid_cmm_register(adapter) != 0) {
484
485 con_log(CL_ANN, (KERN_WARNING
486 "megaraid: could not register with management module\n"));
487
488 goto out_fini_mbox;
489 }
490
491 // setup adapter handle in PCI soft state
492 pci_set_drvdata(pdev, adapter);
493
494 // attach with scsi mid-layer
495 if (megaraid_io_attach(adapter) != 0) {
496
497 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
498
499 goto out_cmm_unreg;
500 }
501
502 return 0;
503
504 out_cmm_unreg:
505 megaraid_cmm_unregister(adapter);
506 out_fini_mbox:
507 megaraid_fini_mbox(adapter);
508 out_free_adapter:
509 kfree(adapter);
510 out_probe_one:
511 pci_disable_device(pdev);
512
513 return -ENODEV;
514 }
515
516
517 /**
518 * megaraid_detach_one - release framework resources and call LLD release routine
519 * @pdev : handle for our PCI configuration space
520 *
521 * This routine is called during driver unload. We free all the allocated
522 * resources and call the corresponding LLD so that it can also release all
523 * its resources.
524 *
525 * This routine is also called from the PCI hotplug system.
526 */
527 static void
megaraid_detach_one(struct pci_dev * pdev)528 megaraid_detach_one(struct pci_dev *pdev)
529 {
530 adapter_t *adapter;
531 struct Scsi_Host *host;
532
533
534 // Start a rollback on this adapter
535 adapter = pci_get_drvdata(pdev);
536
537 if (!adapter) {
538 con_log(CL_ANN, (KERN_CRIT
539 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
540 pdev->vendor, pdev->device, pdev->subsystem_vendor,
541 pdev->subsystem_device));
542
543 return;
544 }
545 else {
546 con_log(CL_ANN, (KERN_NOTICE
547 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
548 pdev->vendor, pdev->device, pdev->subsystem_vendor,
549 pdev->subsystem_device));
550 }
551
552
553 host = adapter->host;
554
555 // do not allow any more requests from the management module for this
556 // adapter.
557 // FIXME: How do we account for the request which might still be
558 // pending with us?
559 atomic_set(&adapter->being_detached, 1);
560
561 // detach from the IO sub-system
562 megaraid_io_detach(adapter);
563
564 // Unregister from common management module
565 //
566 // FIXME: this must return success or failure for conditions if there
567 // is a command pending with LLD or not.
568 megaraid_cmm_unregister(adapter);
569
570 // finalize the mailbox based controller and release all resources
571 megaraid_fini_mbox(adapter);
572
573 kfree(adapter);
574
575 scsi_host_put(host);
576
577 pci_disable_device(pdev);
578
579 return;
580 }
581
582
583 /**
584 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
585 * @pdev : generic driver model device
586 *
587 * Shutdown notification, perform flush cache.
588 */
589 static void
megaraid_mbox_shutdown(struct pci_dev * pdev)590 megaraid_mbox_shutdown(struct pci_dev *pdev)
591 {
592 adapter_t *adapter = pci_get_drvdata(pdev);
593 static int counter;
594
595 if (!adapter) {
596 con_log(CL_ANN, (KERN_WARNING
597 "megaraid: null device in shutdown\n"));
598 return;
599 }
600
601 // flush caches now
602 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
603 counter++));
604
605 megaraid_mbox_flush_cache(adapter);
606
607 con_log(CL_ANN, ("done\n"));
608 }
609
610
611 /**
612 * megaraid_io_attach - attach a device with the IO subsystem
613 * @adapter : controller's soft state
614 *
615 * Attach this device with the IO subsystem.
616 */
617 static int
megaraid_io_attach(adapter_t * adapter)618 megaraid_io_attach(adapter_t *adapter)
619 {
620 struct Scsi_Host *host;
621
622 // Initialize SCSI Host structure
623 host = scsi_host_alloc(&megaraid_template_g, 8);
624 if (!host) {
625 con_log(CL_ANN, (KERN_WARNING
626 "megaraid mbox: scsi_host_alloc failed\n"));
627
628 return -1;
629 }
630
631 SCSIHOST2ADAP(host) = (caddr_t)adapter;
632 adapter->host = host;
633
634 host->irq = adapter->irq;
635 host->unique_id = adapter->unique_id;
636 host->can_queue = adapter->max_cmds;
637 host->this_id = adapter->init_id;
638 host->sg_tablesize = adapter->sglen;
639 host->max_sectors = adapter->max_sectors;
640 host->cmd_per_lun = adapter->cmd_per_lun;
641 host->max_channel = adapter->max_channel;
642 host->max_id = adapter->max_target;
643 host->max_lun = adapter->max_lun;
644
645
646 // notify mid-layer about the new controller
647 if (scsi_add_host(host, &adapter->pdev->dev)) {
648
649 con_log(CL_ANN, (KERN_WARNING
650 "megaraid mbox: scsi_add_host failed\n"));
651
652 scsi_host_put(host);
653
654 return -1;
655 }
656
657 scsi_scan_host(host);
658
659 return 0;
660 }
661
662
663 /**
664 * megaraid_io_detach - detach a device from the IO subsystem
665 * @adapter : controller's soft state
666 *
667 * Detach this device from the IO subsystem.
668 */
669 static void
megaraid_io_detach(adapter_t * adapter)670 megaraid_io_detach(adapter_t *adapter)
671 {
672 struct Scsi_Host *host;
673
674 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
675
676 host = adapter->host;
677
678 scsi_remove_host(host);
679
680 return;
681 }
682
683
684 /*
685 * START: Mailbox Low Level Driver
686 *
687 * This is section specific to the single mailbox based controllers
688 */
689
690 /**
691 * megaraid_init_mbox - initialize controller
692 * @adapter : our soft state
693 *
694 * - Allocate 16-byte aligned mailbox memory for firmware handshake
695 * - Allocate controller's memory resources
696 * - Find out all initialization data
697 * - Allocate memory required for all the commands
698 * - Use internal library of FW routines, build up complete soft state
699 */
700 static int
megaraid_init_mbox(adapter_t * adapter)701 megaraid_init_mbox(adapter_t *adapter)
702 {
703 struct pci_dev *pdev;
704 mraid_device_t *raid_dev;
705 int i;
706 uint32_t magic64;
707
708
709 adapter->ito = MBOX_TIMEOUT;
710 pdev = adapter->pdev;
711
712 /*
713 * Allocate and initialize the init data structure for mailbox
714 * controllers
715 */
716 raid_dev = kzalloc_obj(mraid_device_t);
717 if (raid_dev == NULL) return -1;
718
719
720 /*
721 * Attach the adapter soft state to raid device soft state
722 */
723 adapter->raid_device = (caddr_t)raid_dev;
724 raid_dev->fast_load = megaraid_fast_load;
725
726
727 // our baseport
728 raid_dev->baseport = pci_resource_start(pdev, 0);
729
730 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
731
732 con_log(CL_ANN, (KERN_WARNING
733 "megaraid: mem region busy\n"));
734
735 goto out_free_raid_dev;
736 }
737
738 raid_dev->baseaddr = ioremap(raid_dev->baseport, 128);
739
740 if (!raid_dev->baseaddr) {
741
742 con_log(CL_ANN, (KERN_WARNING
743 "megaraid: could not map hba memory\n") );
744
745 goto out_release_regions;
746 }
747
748 /* initialize the mutual exclusion lock for the mailbox */
749 spin_lock_init(&raid_dev->mailbox_lock);
750
751 /* allocate memory required for commands */
752 if (megaraid_alloc_cmd_packets(adapter) != 0)
753 goto out_iounmap;
754
755 /*
756 * Issue SYNC cmd to flush the pending cmds in the adapter
757 * and initialize its internal state
758 */
759
760 if (megaraid_mbox_fire_sync_cmd(adapter))
761 con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
762
763 /*
764 * Setup the rest of the soft state using the library of
765 * FW routines
766 */
767
768 /* request IRQ and register the interrupt service routine */
769 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
770 adapter)) {
771
772 con_log(CL_ANN, (KERN_WARNING
773 "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
774 goto out_alloc_cmds;
775
776 }
777
778 // Product info
779 if (megaraid_mbox_product_info(adapter) != 0)
780 goto out_free_irq;
781
782 // Do we support extended CDBs
783 adapter->max_cdb_sz = 10;
784 if (megaraid_mbox_extended_cdb(adapter) == 0) {
785 adapter->max_cdb_sz = 16;
786 }
787
788 /*
789 * Do we support cluster environment, if we do, what is the initiator
790 * id.
791 * NOTE: In a non-cluster aware firmware environment, the LLD should
792 * return 7 as initiator id.
793 */
794 adapter->ha = 0;
795 adapter->init_id = -1;
796 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
797 adapter->ha = 1;
798 }
799
800 /*
801 * Prepare the device ids array to have the mapping between the kernel
802 * device address and megaraid device address.
803 * We export the physical devices on their actual addresses. The
804 * logical drives are exported on a virtual SCSI channel
805 */
806 megaraid_mbox_setup_device_map(adapter);
807
808 // If the firmware supports random deletion, update the device id map
809 if (megaraid_mbox_support_random_del(adapter)) {
810
811 // Change the logical drives numbers in device_ids array one
812 // slot in device_ids is reserved for target id, that's why
813 // "<=" below
814 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
815 adapter->device_ids[adapter->max_channel][i] += 0x80;
816 }
817 adapter->device_ids[adapter->max_channel][adapter->init_id] =
818 0xFF;
819
820 raid_dev->random_del_supported = 1;
821 }
822
823 /*
824 * find out the maximum number of scatter-gather elements supported by
825 * this firmware
826 */
827 adapter->sglen = megaraid_mbox_get_max_sg(adapter);
828
829 // enumerate RAID and SCSI channels so that all devices on SCSI
830 // channels can later be exported, including disk devices
831 megaraid_mbox_enum_raid_scsi(adapter);
832
833 /*
834 * Other parameters required by upper layer
835 *
836 * maximum number of sectors per IO command
837 */
838 adapter->max_sectors = megaraid_max_sectors;
839
840 /*
841 * number of queued commands per LUN.
842 */
843 adapter->cmd_per_lun = megaraid_cmd_per_lun;
844
845 /*
846 * Allocate resources required to issue FW calls, when sysfs is
847 * accessed
848 */
849 if (megaraid_sysfs_alloc_resources(adapter) != 0)
850 goto out_free_irq;
851
852 // Set the DMA mask to 64-bit. All supported controllers as capable of
853 // DMA in this range
854 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
855
856 if (((magic64 == HBA_SIGNATURE_64_BIT) &&
857 ((adapter->pdev->subsystem_device !=
858 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
859 (adapter->pdev->subsystem_device !=
860 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
861 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
862 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
863 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
864 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
865 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
866 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
867 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
868 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
869 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
870 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
871 if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(64))) {
872 con_log(CL_ANN, (KERN_WARNING
873 "megaraid: DMA mask for 64-bit failed\n"));
874
875 if (dma_set_mask(&adapter->pdev->dev,
876 DMA_BIT_MASK(32))) {
877 con_log(CL_ANN, (KERN_WARNING
878 "megaraid: 32-bit DMA mask failed\n"));
879 goto out_free_sysfs_res;
880 }
881 }
882 }
883
884 // setup tasklet for DPC
885 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
886 (unsigned long)adapter);
887
888 con_log(CL_DLEVEL1, (KERN_INFO
889 "megaraid mbox hba successfully initialized\n"));
890
891 return 0;
892
893 out_free_sysfs_res:
894 megaraid_sysfs_free_resources(adapter);
895 out_free_irq:
896 free_irq(adapter->irq, adapter);
897 out_alloc_cmds:
898 megaraid_free_cmd_packets(adapter);
899 out_iounmap:
900 iounmap(raid_dev->baseaddr);
901 out_release_regions:
902 pci_release_regions(pdev);
903 out_free_raid_dev:
904 kfree(raid_dev);
905
906 return -1;
907 }
908
909
910 /**
911 * megaraid_fini_mbox - undo controller initialization
912 * @adapter : our soft state
913 */
914 static void
megaraid_fini_mbox(adapter_t * adapter)915 megaraid_fini_mbox(adapter_t *adapter)
916 {
917 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
918
919 // flush all caches
920 megaraid_mbox_flush_cache(adapter);
921
922 tasklet_kill(&adapter->dpc_h);
923
924 megaraid_sysfs_free_resources(adapter);
925
926 megaraid_free_cmd_packets(adapter);
927
928 free_irq(adapter->irq, adapter);
929
930 iounmap(raid_dev->baseaddr);
931
932 pci_release_regions(adapter->pdev);
933
934 kfree(raid_dev);
935
936 return;
937 }
938
939
940 /**
941 * megaraid_alloc_cmd_packets - allocate shared mailbox
942 * @adapter : soft state of the raid controller
943 *
944 * Allocate and align the shared mailbox. This mailbox is used to issue
945 * all the commands. For IO based controllers, the mailbox is also registered
946 * with the FW. Allocate memory for all commands as well.
947 * This is our big allocator.
948 */
949 static int
megaraid_alloc_cmd_packets(adapter_t * adapter)950 megaraid_alloc_cmd_packets(adapter_t *adapter)
951 {
952 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
953 struct pci_dev *pdev;
954 unsigned long align;
955 scb_t *scb;
956 mbox_ccb_t *ccb;
957 struct mraid_pci_blk *epthru_pci_blk;
958 struct mraid_pci_blk *sg_pci_blk;
959 struct mraid_pci_blk *mbox_pci_blk;
960 int i;
961
962 pdev = adapter->pdev;
963
964 /*
965 * Setup the mailbox
966 * Allocate the common 16-byte aligned memory for the handshake
967 * mailbox.
968 */
969 raid_dev->una_mbox64 = dma_alloc_coherent(&adapter->pdev->dev,
970 sizeof(mbox64_t),
971 &raid_dev->una_mbox64_dma,
972 GFP_KERNEL);
973
974 if (!raid_dev->una_mbox64) {
975 con_log(CL_ANN, (KERN_WARNING
976 "megaraid: out of memory, %s %d\n", __func__,
977 __LINE__));
978 return -1;
979 }
980
981 /*
982 * Align the mailbox at 16-byte boundary
983 */
984 raid_dev->mbox = &raid_dev->una_mbox64->mbox32;
985
986 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
987 (~0UL ^ 0xFUL));
988
989 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
990
991 align = ((void *)raid_dev->mbox -
992 ((void *)&raid_dev->una_mbox64->mbox32));
993
994 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
995 align;
996
997 // Allocate memory for commands issued internally
998 adapter->ibuf = dma_alloc_coherent(&pdev->dev, MBOX_IBUF_SIZE,
999 &adapter->ibuf_dma_h, GFP_KERNEL);
1000 if (!adapter->ibuf) {
1001
1002 con_log(CL_ANN, (KERN_WARNING
1003 "megaraid: out of memory, %s %d\n", __func__,
1004 __LINE__));
1005
1006 goto out_free_common_mbox;
1007 }
1008
1009 // Allocate memory for our SCSI Command Blocks and their associated
1010 // memory
1011
1012 /*
1013 * Allocate memory for the base list of scb. Later allocate memory for
1014 * CCBs and embedded components of each CCB and point the pointers in
1015 * scb to the allocated components
1016 * NOTE: The code to allocate SCB will be duplicated in all the LLD
1017 * since the calling routine does not yet know the number of available
1018 * commands.
1019 */
1020 adapter->kscb_list = kzalloc_objs(scb_t, MBOX_MAX_SCSI_CMDS);
1021
1022 if (adapter->kscb_list == NULL) {
1023 con_log(CL_ANN, (KERN_WARNING
1024 "megaraid: out of memory, %s %d\n", __func__,
1025 __LINE__));
1026 goto out_free_ibuf;
1027 }
1028
1029 // memory allocation for our command packets
1030 if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1031 con_log(CL_ANN, (KERN_WARNING
1032 "megaraid: out of memory, %s %d\n", __func__,
1033 __LINE__));
1034 goto out_free_scb_list;
1035 }
1036
1037 // Adjust the scb pointers and link in the free pool
1038 epthru_pci_blk = raid_dev->epthru_pool;
1039 sg_pci_blk = raid_dev->sg_pool;
1040 mbox_pci_blk = raid_dev->mbox_pool;
1041
1042 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1043 scb = adapter->kscb_list + i;
1044 ccb = raid_dev->ccb_list + i;
1045
1046 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1047 ccb->raw_mbox = (uint8_t *)ccb->mbox;
1048 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1049 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1050
1051 // make sure the mailbox is aligned properly
1052 if (ccb->mbox_dma_h & 0x0F) {
1053 con_log(CL_ANN, (KERN_CRIT
1054 "megaraid mbox: not aligned on 16-bytes\n"));
1055
1056 goto out_teardown_dma_pools;
1057 }
1058
1059 ccb->epthru = (mraid_epassthru_t *)
1060 epthru_pci_blk[i].vaddr;
1061 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr;
1062 ccb->pthru = (mraid_passthru_t *)ccb->epthru;
1063 ccb->pthru_dma_h = ccb->epthru_dma_h;
1064
1065
1066 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1067 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr;
1068 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64;
1069
1070 scb->ccb = (caddr_t)ccb;
1071 scb->gp = 0;
1072
1073 scb->sno = i; // command index
1074
1075 scb->scp = NULL;
1076 scb->state = SCB_FREE;
1077 scb->dma_direction = DMA_NONE;
1078 scb->dma_type = MRAID_DMA_NONE;
1079 scb->dev_channel = -1;
1080 scb->dev_target = -1;
1081
1082 // put scb in the free pool
1083 list_add_tail(&scb->list, &adapter->kscb_pool);
1084 }
1085
1086 return 0;
1087
1088 out_teardown_dma_pools:
1089 megaraid_mbox_teardown_dma_pools(adapter);
1090 out_free_scb_list:
1091 kfree(adapter->kscb_list);
1092 out_free_ibuf:
1093 dma_free_coherent(&pdev->dev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1094 adapter->ibuf_dma_h);
1095 out_free_common_mbox:
1096 dma_free_coherent(&adapter->pdev->dev, sizeof(mbox64_t),
1097 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1098
1099 return -1;
1100 }
1101
1102
1103 /**
1104 * megaraid_free_cmd_packets - free memory
1105 * @adapter : soft state of the raid controller
1106 *
1107 * Release memory resources allocated for commands.
1108 */
1109 static void
megaraid_free_cmd_packets(adapter_t * adapter)1110 megaraid_free_cmd_packets(adapter_t *adapter)
1111 {
1112 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1113
1114 megaraid_mbox_teardown_dma_pools(adapter);
1115
1116 kfree(adapter->kscb_list);
1117
1118 dma_free_coherent(&adapter->pdev->dev, MBOX_IBUF_SIZE,
1119 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1120
1121 dma_free_coherent(&adapter->pdev->dev, sizeof(mbox64_t),
1122 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1123 return;
1124 }
1125
1126
1127 /**
1128 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1129 * @adapter : HBA soft state
1130 *
1131 * Setup the dma pools for mailbox, passthru and extended passthru structures,
1132 * and scatter-gather lists.
1133 */
1134 static int
megaraid_mbox_setup_dma_pools(adapter_t * adapter)1135 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1136 {
1137 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1138 struct mraid_pci_blk *epthru_pci_blk;
1139 struct mraid_pci_blk *sg_pci_blk;
1140 struct mraid_pci_blk *mbox_pci_blk;
1141 int i;
1142
1143
1144
1145 // Allocate memory for 16-bytes aligned mailboxes
1146 raid_dev->mbox_pool_handle = dma_pool_create("megaraid mbox pool",
1147 &adapter->pdev->dev,
1148 sizeof(mbox64_t) + 16,
1149 16, 0);
1150
1151 if (raid_dev->mbox_pool_handle == NULL) {
1152 goto fail_setup_dma_pool;
1153 }
1154
1155 mbox_pci_blk = raid_dev->mbox_pool;
1156 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1157 mbox_pci_blk[i].vaddr = dma_pool_alloc(
1158 raid_dev->mbox_pool_handle,
1159 GFP_KERNEL,
1160 &mbox_pci_blk[i].dma_addr);
1161 if (!mbox_pci_blk[i].vaddr) {
1162 goto fail_setup_dma_pool;
1163 }
1164 }
1165
1166 /*
1167 * Allocate memory for each embedded passthru strucuture pointer
1168 * Request for a 128 bytes aligned structure for each passthru command
1169 * structure
1170 * Since passthru and extended passthru commands are exclusive, they
1171 * share common memory pool. Passthru structures piggyback on memory
1172 * allocated to extended passthru since passthru is smaller of the two
1173 */
1174 raid_dev->epthru_pool_handle = dma_pool_create("megaraid mbox pthru",
1175 &adapter->pdev->dev, sizeof(mraid_epassthru_t), 128, 0);
1176
1177 if (raid_dev->epthru_pool_handle == NULL) {
1178 goto fail_setup_dma_pool;
1179 }
1180
1181 epthru_pci_blk = raid_dev->epthru_pool;
1182 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1183 epthru_pci_blk[i].vaddr = dma_pool_alloc(
1184 raid_dev->epthru_pool_handle,
1185 GFP_KERNEL,
1186 &epthru_pci_blk[i].dma_addr);
1187 if (!epthru_pci_blk[i].vaddr) {
1188 goto fail_setup_dma_pool;
1189 }
1190 }
1191
1192
1193 // Allocate memory for each scatter-gather list. Request for 512 bytes
1194 // alignment for each sg list
1195 raid_dev->sg_pool_handle = dma_pool_create("megaraid mbox sg",
1196 &adapter->pdev->dev,
1197 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1198 512, 0);
1199
1200 if (raid_dev->sg_pool_handle == NULL) {
1201 goto fail_setup_dma_pool;
1202 }
1203
1204 sg_pci_blk = raid_dev->sg_pool;
1205 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1206 sg_pci_blk[i].vaddr = dma_pool_alloc(
1207 raid_dev->sg_pool_handle,
1208 GFP_KERNEL,
1209 &sg_pci_blk[i].dma_addr);
1210 if (!sg_pci_blk[i].vaddr) {
1211 goto fail_setup_dma_pool;
1212 }
1213 }
1214
1215 return 0;
1216
1217 fail_setup_dma_pool:
1218 megaraid_mbox_teardown_dma_pools(adapter);
1219 return -1;
1220 }
1221
1222
1223 /**
1224 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1225 * @adapter : HBA soft state
1226 *
1227 * Teardown the dma pool for mailbox, passthru and extended passthru
1228 * structures, and scatter-gather lists.
1229 */
1230 static void
megaraid_mbox_teardown_dma_pools(adapter_t * adapter)1231 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1232 {
1233 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1234 struct mraid_pci_blk *epthru_pci_blk;
1235 struct mraid_pci_blk *sg_pci_blk;
1236 struct mraid_pci_blk *mbox_pci_blk;
1237 int i;
1238
1239
1240 sg_pci_blk = raid_dev->sg_pool;
1241 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1242 dma_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1243 sg_pci_blk[i].dma_addr);
1244 }
1245 dma_pool_destroy(raid_dev->sg_pool_handle);
1246
1247
1248 epthru_pci_blk = raid_dev->epthru_pool;
1249 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1250 dma_pool_free(raid_dev->epthru_pool_handle,
1251 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1252 }
1253 dma_pool_destroy(raid_dev->epthru_pool_handle);
1254
1255
1256 mbox_pci_blk = raid_dev->mbox_pool;
1257 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1258 dma_pool_free(raid_dev->mbox_pool_handle,
1259 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1260 }
1261 dma_pool_destroy(raid_dev->mbox_pool_handle);
1262
1263 return;
1264 }
1265
1266
1267 /**
1268 * megaraid_alloc_scb - detach and return a scb from the free list
1269 * @adapter : controller's soft state
1270 * @scp : pointer to the scsi command to be executed
1271 *
1272 * Return the scb from the head of the free list. %NULL if there are none
1273 * available.
1274 */
1275 static scb_t *
megaraid_alloc_scb(adapter_t * adapter,struct scsi_cmnd * scp)1276 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1277 {
1278 struct list_head *head = &adapter->kscb_pool;
1279 scb_t *scb = NULL;
1280 unsigned long flags;
1281
1282 // detach scb from free pool
1283 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1284
1285 if (list_empty(head)) {
1286 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1287 return NULL;
1288 }
1289
1290 scb = list_entry(head->next, scb_t, list);
1291 list_del_init(&scb->list);
1292
1293 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1294
1295 scb->state = SCB_ACTIVE;
1296 scb->scp = scp;
1297 scb->dma_type = MRAID_DMA_NONE;
1298
1299 return scb;
1300 }
1301
1302
1303 /**
1304 * megaraid_dealloc_scb - return the scb to the free pool
1305 * @adapter : controller's soft state
1306 * @scb : scb to be freed
1307 *
1308 * Return the scb back to the free list of scbs. The caller must 'flush' the
1309 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1310 * NOTE NOTE: Make sure the scb is not on any list before calling this
1311 * routine.
1312 */
1313 static inline void
megaraid_dealloc_scb(adapter_t * adapter,scb_t * scb)1314 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1315 {
1316 unsigned long flags;
1317
1318 // put scb in the free pool
1319 scb->state = SCB_FREE;
1320 scb->scp = NULL;
1321 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1322
1323 list_add(&scb->list, &adapter->kscb_pool);
1324
1325 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1326
1327 return;
1328 }
1329
1330
1331 /**
1332 * megaraid_mbox_mksgl - make the scatter-gather list
1333 * @adapter : controller's soft state
1334 * @scb : scsi control block
1335 *
1336 * Prepare the scatter-gather list.
1337 */
1338 static int
megaraid_mbox_mksgl(adapter_t * adapter,scb_t * scb)1339 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1340 {
1341 struct scatterlist *sgl;
1342 mbox_ccb_t *ccb;
1343 struct scsi_cmnd *scp;
1344 int sgcnt;
1345 int i;
1346
1347
1348 scp = scb->scp;
1349 ccb = (mbox_ccb_t *)scb->ccb;
1350
1351 sgcnt = scsi_dma_map(scp);
1352 BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen);
1353
1354 // no mapping required if no data to be transferred
1355 if (!sgcnt)
1356 return 0;
1357
1358 scb->dma_type = MRAID_DMA_WSG;
1359
1360 scsi_for_each_sg(scp, sgl, sgcnt, i) {
1361 ccb->sgl64[i].address = sg_dma_address(sgl);
1362 ccb->sgl64[i].length = sg_dma_len(sgl);
1363 }
1364
1365 // Return count of SG nodes
1366 return sgcnt;
1367 }
1368
1369
1370 /**
1371 * mbox_post_cmd - issue a mailbox command
1372 * @adapter : controller's soft state
1373 * @scb : command to be issued
1374 *
1375 * Post the command to the controller if mailbox is available.
1376 */
1377 static int
mbox_post_cmd(adapter_t * adapter,scb_t * scb)1378 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1379 {
1380 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1381 mbox64_t *mbox64;
1382 mbox_t *mbox;
1383 mbox_ccb_t *ccb;
1384 unsigned long flags;
1385 unsigned int i = 0;
1386
1387
1388 ccb = (mbox_ccb_t *)scb->ccb;
1389 mbox = raid_dev->mbox;
1390 mbox64 = raid_dev->mbox64;
1391
1392 /*
1393 * Check for busy mailbox. If it is, return failure - the caller
1394 * should retry later.
1395 */
1396 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1397
1398 if (unlikely(mbox->busy)) {
1399 do {
1400 udelay(1);
1401 i++;
1402 rmb();
1403 } while(mbox->busy && (i < max_mbox_busy_wait));
1404
1405 if (mbox->busy) {
1406
1407 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1408
1409 return -1;
1410 }
1411 }
1412
1413
1414 // Copy this command's mailbox data into "adapter's" mailbox
1415 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1416 mbox->cmdid = scb->sno;
1417
1418 adapter->outstanding_cmds++;
1419
1420 mbox->busy = 1; // Set busy
1421 mbox->poll = 0;
1422 mbox->ack = 0;
1423 wmb();
1424
1425 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1426
1427 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1428
1429 return 0;
1430 }
1431
1432
1433 /**
1434 * megaraid_queue_command_lck - generic queue entry point for all LLDs
1435 * @scp : pointer to the scsi command to be executed
1436 *
1437 * Queue entry point for mailbox based controllers.
1438 */
megaraid_queue_command_lck(struct scsi_cmnd * scp)1439 static enum scsi_qc_status megaraid_queue_command_lck(struct scsi_cmnd *scp)
1440 {
1441 void (*done)(struct scsi_cmnd *) = scsi_done;
1442 adapter_t *adapter;
1443 scb_t *scb;
1444 enum scsi_qc_status if_busy;
1445
1446 adapter = SCP2ADAPTER(scp);
1447 scp->result = 0;
1448
1449 /*
1450 * Allocate and build a SCB request
1451 * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1452 * not allocate scb. We will return non-zero status in that case.
1453 * NOTE: scb can be null even though certain commands completed
1454 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1455 * return 0 in that case, and we would do the callback right away.
1456 */
1457 if_busy = 0;
1458 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1459 if (!scb) { // command already completed
1460 done(scp);
1461 return 0;
1462 }
1463
1464 megaraid_mbox_runpendq(adapter, scb);
1465 return if_busy;
1466 }
1467
DEF_SCSI_QCMD(megaraid_queue_command)1468 static DEF_SCSI_QCMD(megaraid_queue_command)
1469
1470 /**
1471 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
1472 * @adapter : controller's soft state
1473 * @scp : mid-layer scsi command pointer
1474 * @busy : set if request could not be completed because of lack of
1475 * resources
1476 *
1477 * Transform the mid-layer scsi command to megaraid firmware lingua.
1478 * Convert the command issued by mid-layer to format understood by megaraid
1479 * firmware. We also complete certain commands without sending them to firmware.
1480 */
1481 static scb_t *
1482 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp,
1483 enum scsi_qc_status *busy)
1484 {
1485 mraid_device_t *rdev = ADAP2RAIDDEV(adapter);
1486 int channel;
1487 int target;
1488 int islogical;
1489 mbox_ccb_t *ccb;
1490 mraid_passthru_t *pthru;
1491 mbox64_t *mbox64;
1492 mbox_t *mbox;
1493 scb_t *scb;
1494 char skip[] = "skipping";
1495 char scan[] = "scanning";
1496 char *ss;
1497
1498
1499 /*
1500 * Get the appropriate device map for the device this command is
1501 * intended for
1502 */
1503 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1504
1505 /*
1506 * Logical drive commands
1507 */
1508 if (islogical) {
1509 switch (scp->cmnd[0]) {
1510 case TEST_UNIT_READY:
1511 /*
1512 * Do we support clustering and is the support enabled
1513 * If no, return success always
1514 */
1515 if (!adapter->ha) {
1516 scp->result = (DID_OK << 16);
1517 return NULL;
1518 }
1519
1520 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1521 scp->result = (DID_ERROR << 16);
1522 *busy = SCSI_MLQUEUE_HOST_BUSY;
1523 return NULL;
1524 }
1525
1526 scb->dma_direction = scp->sc_data_direction;
1527 scb->dev_channel = 0xFF;
1528 scb->dev_target = target;
1529 ccb = (mbox_ccb_t *)scb->ccb;
1530
1531 /*
1532 * The command id will be provided by the command
1533 * issuance routine
1534 */
1535 ccb->raw_mbox[0] = CLUSTER_CMD;
1536 ccb->raw_mbox[2] = RESERVATION_STATUS;
1537 ccb->raw_mbox[3] = target;
1538
1539 return scb;
1540
1541 case MODE_SENSE:
1542 {
1543 struct scatterlist *sgl;
1544 caddr_t vaddr;
1545
1546 sgl = scsi_sglist(scp);
1547 if (sg_page(sgl)) {
1548 vaddr = (caddr_t) sg_virt(&sgl[0]);
1549
1550 memset(vaddr, 0, scp->cmnd[4]);
1551 }
1552 else {
1553 con_log(CL_ANN, (KERN_WARNING
1554 "megaraid mailbox: invalid sg:%d\n",
1555 __LINE__));
1556 }
1557 }
1558 scp->result = (DID_OK << 16);
1559 return NULL;
1560
1561 case INQUIRY:
1562 /*
1563 * Display the channel scan for logical drives
1564 * Do not display scan for a channel if already done.
1565 */
1566 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1567
1568 con_log(CL_ANN, (KERN_INFO
1569 "scsi[%d]: scanning scsi channel %d",
1570 adapter->host->host_no,
1571 SCP2CHANNEL(scp)));
1572
1573 con_log(CL_ANN, (
1574 " [virtual] for logical drives\n"));
1575
1576 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1577 }
1578
1579 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1580 scsi_build_sense(scp, 0, ILLEGAL_REQUEST,
1581 MEGA_INVALID_FIELD_IN_CDB, 0);
1582 return NULL;
1583 }
1584
1585 fallthrough;
1586
1587 case READ_CAPACITY:
1588 /*
1589 * Do not allow LUN > 0 for logical drives and
1590 * requests for more than 40 logical drives
1591 */
1592 if (SCP2LUN(scp)) {
1593 scp->result = (DID_BAD_TARGET << 16);
1594 return NULL;
1595 }
1596 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1597 scp->result = (DID_BAD_TARGET << 16);
1598 return NULL;
1599 }
1600
1601
1602 /* Allocate a SCB and initialize passthru */
1603 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1604 scp->result = (DID_ERROR << 16);
1605 *busy = SCSI_MLQUEUE_HOST_BUSY;
1606 return NULL;
1607 }
1608
1609 ccb = (mbox_ccb_t *)scb->ccb;
1610 scb->dev_channel = 0xFF;
1611 scb->dev_target = target;
1612 pthru = ccb->pthru;
1613 mbox = ccb->mbox;
1614 mbox64 = ccb->mbox64;
1615
1616 pthru->timeout = 0;
1617 pthru->ars = 1;
1618 pthru->reqsenselen = 14;
1619 pthru->islogical = 1;
1620 pthru->logdrv = target;
1621 pthru->cdblen = scp->cmd_len;
1622 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1623
1624 mbox->cmd = MBOXCMD_PASSTHRU64;
1625 scb->dma_direction = scp->sc_data_direction;
1626
1627 pthru->dataxferlen = scsi_bufflen(scp);
1628 pthru->dataxferaddr = ccb->sgl_dma_h;
1629 pthru->numsge = megaraid_mbox_mksgl(adapter,
1630 scb);
1631
1632 mbox->xferaddr = 0xFFFFFFFF;
1633 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h;
1634 mbox64->xferaddr_hi = 0;
1635
1636 return scb;
1637
1638 case READ_6:
1639 case WRITE_6:
1640 case READ_10:
1641 case WRITE_10:
1642 case READ_12:
1643 case WRITE_12:
1644
1645 /*
1646 * Allocate a SCB and initialize mailbox
1647 */
1648 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1649 scp->result = (DID_ERROR << 16);
1650 *busy = SCSI_MLQUEUE_HOST_BUSY;
1651 return NULL;
1652 }
1653 ccb = (mbox_ccb_t *)scb->ccb;
1654 scb->dev_channel = 0xFF;
1655 scb->dev_target = target;
1656 mbox = ccb->mbox;
1657 mbox64 = ccb->mbox64;
1658 mbox->logdrv = target;
1659
1660 /*
1661 * A little HACK: 2nd bit is zero for all scsi read
1662 * commands and is set for all scsi write commands
1663 */
1664 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64:
1665 MBOXCMD_LREAD64 ;
1666
1667 /*
1668 * 6-byte READ(0x08) or WRITE(0x0A) cdb
1669 */
1670 if (scp->cmd_len == 6) {
1671 mbox->numsectors = (uint32_t)scp->cmnd[4];
1672 mbox->lba =
1673 ((uint32_t)scp->cmnd[1] << 16) |
1674 ((uint32_t)scp->cmnd[2] << 8) |
1675 (uint32_t)scp->cmnd[3];
1676
1677 mbox->lba &= 0x1FFFFF;
1678 }
1679
1680 /*
1681 * 10-byte READ(0x28) or WRITE(0x2A) cdb
1682 */
1683 else if (scp->cmd_len == 10) {
1684 mbox->numsectors =
1685 (uint32_t)scp->cmnd[8] |
1686 ((uint32_t)scp->cmnd[7] << 8);
1687 mbox->lba =
1688 ((uint32_t)scp->cmnd[2] << 24) |
1689 ((uint32_t)scp->cmnd[3] << 16) |
1690 ((uint32_t)scp->cmnd[4] << 8) |
1691 (uint32_t)scp->cmnd[5];
1692 }
1693
1694 /*
1695 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1696 */
1697 else if (scp->cmd_len == 12) {
1698 mbox->lba =
1699 ((uint32_t)scp->cmnd[2] << 24) |
1700 ((uint32_t)scp->cmnd[3] << 16) |
1701 ((uint32_t)scp->cmnd[4] << 8) |
1702 (uint32_t)scp->cmnd[5];
1703
1704 mbox->numsectors =
1705 ((uint32_t)scp->cmnd[6] << 24) |
1706 ((uint32_t)scp->cmnd[7] << 16) |
1707 ((uint32_t)scp->cmnd[8] << 8) |
1708 (uint32_t)scp->cmnd[9];
1709 }
1710 else {
1711 con_log(CL_ANN, (KERN_WARNING
1712 "megaraid: unsupported CDB length\n"));
1713
1714 megaraid_dealloc_scb(adapter, scb);
1715
1716 scp->result = (DID_ERROR << 16);
1717 return NULL;
1718 }
1719
1720 scb->dma_direction = scp->sc_data_direction;
1721
1722 // Calculate Scatter-Gather info
1723 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h;
1724 mbox->numsge = megaraid_mbox_mksgl(adapter,
1725 scb);
1726 mbox->xferaddr = 0xFFFFFFFF;
1727 mbox64->xferaddr_hi = 0;
1728
1729 return scb;
1730
1731 case RESERVE_6:
1732 case RELEASE_6:
1733 /*
1734 * Do we support clustering and is the support enabled
1735 */
1736 if (!adapter->ha) {
1737 scp->result = (DID_BAD_TARGET << 16);
1738 return NULL;
1739 }
1740
1741 /*
1742 * Allocate a SCB and initialize mailbox
1743 */
1744 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1745 scp->result = (DID_ERROR << 16);
1746 *busy = SCSI_MLQUEUE_HOST_BUSY;
1747 return NULL;
1748 }
1749
1750 ccb = (mbox_ccb_t *)scb->ccb;
1751 scb->dev_channel = 0xFF;
1752 scb->dev_target = target;
1753 ccb->raw_mbox[0] = CLUSTER_CMD;
1754 ccb->raw_mbox[2] = scp->cmnd[0] == RESERVE_6 ?
1755 RESERVE_LD : RELEASE_LD;
1756
1757 ccb->raw_mbox[3] = target;
1758 scb->dma_direction = scp->sc_data_direction;
1759
1760 return scb;
1761
1762 default:
1763 scp->result = (DID_BAD_TARGET << 16);
1764 return NULL;
1765 }
1766 }
1767 else { // Passthru device commands
1768
1769 // Do not allow access to target id > 15 or LUN > 7
1770 if (target > 15 || SCP2LUN(scp) > 7) {
1771 scp->result = (DID_BAD_TARGET << 16);
1772 return NULL;
1773 }
1774
1775 // if fast load option was set and scan for last device is
1776 // over, reset the fast_load flag so that during a possible
1777 // next scan, devices can be made available
1778 if (rdev->fast_load && (target == 15) &&
1779 (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1780
1781 con_log(CL_ANN, (KERN_INFO
1782 "megaraid[%d]: physical device scan re-enabled\n",
1783 adapter->host->host_no));
1784 rdev->fast_load = 0;
1785 }
1786
1787 /*
1788 * Display the channel scan for physical devices
1789 */
1790 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1791
1792 ss = rdev->fast_load ? skip : scan;
1793
1794 con_log(CL_ANN, (KERN_INFO
1795 "scsi[%d]: %s scsi channel %d [Phy %d]",
1796 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1797 channel));
1798
1799 con_log(CL_ANN, (
1800 " for non-raid devices\n"));
1801
1802 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1803 }
1804
1805 // disable channel sweep if fast load option given
1806 if (rdev->fast_load) {
1807 scp->result = (DID_BAD_TARGET << 16);
1808 return NULL;
1809 }
1810
1811 // Allocate a SCB and initialize passthru
1812 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1813 scp->result = (DID_ERROR << 16);
1814 *busy = SCSI_MLQUEUE_HOST_BUSY;
1815 return NULL;
1816 }
1817
1818 ccb = (mbox_ccb_t *)scb->ccb;
1819 scb->dev_channel = channel;
1820 scb->dev_target = target;
1821 scb->dma_direction = scp->sc_data_direction;
1822 mbox = ccb->mbox;
1823 mbox64 = ccb->mbox64;
1824
1825 // Does this firmware support extended CDBs
1826 if (adapter->max_cdb_sz == 16) {
1827 mbox->cmd = MBOXCMD_EXTPTHRU;
1828
1829 megaraid_mbox_prepare_epthru(adapter, scb, scp);
1830
1831 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h;
1832 mbox64->xferaddr_hi = 0;
1833 mbox->xferaddr = 0xFFFFFFFF;
1834 }
1835 else {
1836 mbox->cmd = MBOXCMD_PASSTHRU64;
1837
1838 megaraid_mbox_prepare_pthru(adapter, scb, scp);
1839
1840 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h;
1841 mbox64->xferaddr_hi = 0;
1842 mbox->xferaddr = 0xFFFFFFFF;
1843 }
1844 return scb;
1845 }
1846
1847 // NOT REACHED
1848 }
1849
1850
1851 /**
1852 * megaraid_mbox_runpendq - execute commands queued in the pending queue
1853 * @adapter : controller's soft state
1854 * @scb_q : SCB to be queued in the pending list
1855 *
1856 * Scan the pending list for commands which are not yet issued and try to
1857 * post to the controller. The SCB can be a null pointer, which would indicate
1858 * no SCB to be queue, just try to execute the ones in the pending list.
1859 *
1860 * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1861 * out from the head of the pending list. If it is successfully issued, the
1862 * next SCB is at the head now.
1863 */
1864 static void
megaraid_mbox_runpendq(adapter_t * adapter,scb_t * scb_q)1865 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1866 {
1867 scb_t *scb;
1868 unsigned long flags;
1869
1870 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1871
1872 if (scb_q) {
1873 scb_q->state = SCB_PENDQ;
1874 list_add_tail(&scb_q->list, &adapter->pend_list);
1875 }
1876
1877 // if the adapter in not in quiescent mode, post the commands to FW
1878 if (adapter->quiescent) {
1879 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1880 return;
1881 }
1882
1883 while (!list_empty(&adapter->pend_list)) {
1884
1885 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1886
1887 scb = list_entry(adapter->pend_list.next, scb_t, list);
1888
1889 // remove the scb from the pending list and try to
1890 // issue. If we are unable to issue it, put back in
1891 // the pending list and return
1892
1893 list_del_init(&scb->list);
1894
1895 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1896
1897 // if mailbox was busy, return SCB back to pending
1898 // list. Make sure to add at the head, since that's
1899 // where it would have been removed from
1900
1901 scb->state = SCB_ISSUED;
1902
1903 if (mbox_post_cmd(adapter, scb) != 0) {
1904
1905 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1906
1907 scb->state = SCB_PENDQ;
1908
1909 list_add(&scb->list, &adapter->pend_list);
1910
1911 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1912 flags);
1913
1914 return;
1915 }
1916
1917 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1918 }
1919
1920 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1921
1922
1923 return;
1924 }
1925
1926
1927 /**
1928 * megaraid_mbox_prepare_pthru - prepare a command for physical devices
1929 * @adapter : pointer to controller's soft state
1930 * @scb : scsi control block
1931 * @scp : scsi command from the mid-layer
1932 *
1933 * Prepare a command for the scsi physical devices.
1934 */
1935 static void
megaraid_mbox_prepare_pthru(adapter_t * adapter,scb_t * scb,struct scsi_cmnd * scp)1936 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1937 struct scsi_cmnd *scp)
1938 {
1939 mbox_ccb_t *ccb;
1940 mraid_passthru_t *pthru;
1941 uint8_t channel;
1942 uint8_t target;
1943
1944 ccb = (mbox_ccb_t *)scb->ccb;
1945 pthru = ccb->pthru;
1946 channel = scb->dev_channel;
1947 target = scb->dev_target;
1948
1949 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1950 pthru->timeout = 4;
1951 pthru->ars = 1;
1952 pthru->islogical = 0;
1953 pthru->channel = 0;
1954 pthru->target = (channel << 4) | target;
1955 pthru->logdrv = SCP2LUN(scp);
1956 pthru->reqsenselen = 14;
1957 pthru->cdblen = scp->cmd_len;
1958
1959 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1960
1961 if (scsi_bufflen(scp)) {
1962 pthru->dataxferlen = scsi_bufflen(scp);
1963 pthru->dataxferaddr = ccb->sgl_dma_h;
1964 pthru->numsge = megaraid_mbox_mksgl(adapter, scb);
1965 }
1966 else {
1967 pthru->dataxferaddr = 0;
1968 pthru->dataxferlen = 0;
1969 pthru->numsge = 0;
1970 }
1971 return;
1972 }
1973
1974
1975 /**
1976 * megaraid_mbox_prepare_epthru - prepare a command for physical devices
1977 * @adapter : pointer to controller's soft state
1978 * @scb : scsi control block
1979 * @scp : scsi command from the mid-layer
1980 *
1981 * Prepare a command for the scsi physical devices. This routine prepares
1982 * commands for devices which can take extended CDBs (>10 bytes).
1983 */
1984 static void
megaraid_mbox_prepare_epthru(adapter_t * adapter,scb_t * scb,struct scsi_cmnd * scp)1985 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
1986 struct scsi_cmnd *scp)
1987 {
1988 mbox_ccb_t *ccb;
1989 mraid_epassthru_t *epthru;
1990 uint8_t channel;
1991 uint8_t target;
1992
1993 ccb = (mbox_ccb_t *)scb->ccb;
1994 epthru = ccb->epthru;
1995 channel = scb->dev_channel;
1996 target = scb->dev_target;
1997
1998 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1999 epthru->timeout = 4;
2000 epthru->ars = 1;
2001 epthru->islogical = 0;
2002 epthru->channel = 0;
2003 epthru->target = (channel << 4) | target;
2004 epthru->logdrv = SCP2LUN(scp);
2005 epthru->reqsenselen = 14;
2006 epthru->cdblen = scp->cmd_len;
2007
2008 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2009
2010 if (scsi_bufflen(scp)) {
2011 epthru->dataxferlen = scsi_bufflen(scp);
2012 epthru->dataxferaddr = ccb->sgl_dma_h;
2013 epthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2014 }
2015 else {
2016 epthru->dataxferaddr = 0;
2017 epthru->dataxferlen = 0;
2018 epthru->numsge = 0;
2019 }
2020 return;
2021 }
2022
2023
2024 /**
2025 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2026 * @adapter : controller's soft state
2027 *
2028 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
2029 * completed command and put them on the completed list for later processing.
2030 *
2031 * Returns: 1 if the interrupt is valid, 0 otherwise
2032 */
2033 static int
megaraid_ack_sequence(adapter_t * adapter)2034 megaraid_ack_sequence(adapter_t *adapter)
2035 {
2036 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2037 mbox_t *mbox;
2038 scb_t *scb;
2039 uint8_t nstatus;
2040 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS];
2041 struct list_head clist;
2042 int handled;
2043 uint32_t dword;
2044 unsigned long flags;
2045 int i, j;
2046
2047
2048 mbox = raid_dev->mbox;
2049
2050 // move the SCBs from the firmware completed array to our local list
2051 INIT_LIST_HEAD(&clist);
2052
2053 // loop till F/W has more commands for us to complete
2054 handled = 0;
2055 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2056 do {
2057 /*
2058 * Check if a valid interrupt is pending. If found, force the
2059 * interrupt line low.
2060 */
2061 dword = RDOUTDOOR(raid_dev);
2062 if (dword != 0x10001234) break;
2063
2064 handled = 1;
2065
2066 WROUTDOOR(raid_dev, 0x10001234);
2067
2068 nstatus = 0;
2069 // wait for valid numstatus to post
2070 for (i = 0; i < 0xFFFFF; i++) {
2071 if (mbox->numstatus != 0xFF) {
2072 nstatus = mbox->numstatus;
2073 break;
2074 }
2075 rmb();
2076 }
2077 mbox->numstatus = 0xFF;
2078
2079 adapter->outstanding_cmds -= nstatus;
2080
2081 for (i = 0; i < nstatus; i++) {
2082
2083 // wait for valid command index to post
2084 for (j = 0; j < 0xFFFFF; j++) {
2085 if (mbox->completed[i] != 0xFF) break;
2086 rmb();
2087 }
2088 completed[i] = mbox->completed[i];
2089 mbox->completed[i] = 0xFF;
2090
2091 if (completed[i] == 0xFF) {
2092 con_log(CL_ANN, (KERN_CRIT
2093 "megaraid: command posting timed out\n"));
2094
2095 BUG();
2096 continue;
2097 }
2098
2099 // Get SCB associated with this command id
2100 if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2101 // a cmm command
2102 scb = adapter->uscb_list + (completed[i] -
2103 MBOX_MAX_SCSI_CMDS);
2104 }
2105 else {
2106 // an os command
2107 scb = adapter->kscb_list + completed[i];
2108 }
2109
2110 scb->status = mbox->status;
2111 list_add_tail(&scb->list, &clist);
2112 }
2113
2114 // Acknowledge interrupt
2115 WRINDOOR(raid_dev, 0x02);
2116
2117 } while(1);
2118
2119 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2120
2121
2122 // put the completed commands in the completed list. DPC would
2123 // complete these commands later
2124 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2125
2126 list_splice(&clist, &adapter->completed_list);
2127
2128 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2129
2130
2131 // schedule the DPC if there is some work for it
2132 if (handled)
2133 tasklet_schedule(&adapter->dpc_h);
2134
2135 return handled;
2136 }
2137
2138
2139 /**
2140 * megaraid_isr - isr for memory based mailbox based controllers
2141 * @irq : irq
2142 * @devp : pointer to our soft state
2143 *
2144 * Interrupt service routine for memory-mapped mailbox controllers.
2145 */
2146 static irqreturn_t
megaraid_isr(int irq,void * devp)2147 megaraid_isr(int irq, void *devp)
2148 {
2149 adapter_t *adapter = devp;
2150 int handled;
2151
2152 handled = megaraid_ack_sequence(adapter);
2153
2154 /* Loop through any pending requests */
2155 if (!adapter->quiescent) {
2156 megaraid_mbox_runpendq(adapter, NULL);
2157 }
2158
2159 return IRQ_RETVAL(handled);
2160 }
2161
2162
2163 /**
2164 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2165 * @devp : pointer to HBA soft state
2166 *
2167 * Pick up the commands from the completed list and send back to the owners.
2168 * This is a reentrant function and does not assume any locks are held while
2169 * it is being called.
2170 */
2171 static void
megaraid_mbox_dpc(unsigned long devp)2172 megaraid_mbox_dpc(unsigned long devp)
2173 {
2174 adapter_t *adapter = (adapter_t *)devp;
2175 mraid_device_t *raid_dev;
2176 struct list_head clist;
2177 struct scatterlist *sgl;
2178 scb_t *scb;
2179 scb_t *tmp;
2180 struct scsi_cmnd *scp;
2181 mraid_passthru_t *pthru;
2182 mraid_epassthru_t *epthru;
2183 mbox_ccb_t *ccb;
2184 int islogical;
2185 int pdev_index;
2186 int pdev_state;
2187 mbox_t *mbox;
2188 unsigned long flags;
2189 uint8_t c;
2190 int status;
2191 uioc_t *kioc;
2192
2193
2194 if (!adapter) return;
2195
2196 raid_dev = ADAP2RAIDDEV(adapter);
2197
2198 // move the SCBs from the completed list to our local list
2199 INIT_LIST_HEAD(&clist);
2200
2201 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2202
2203 list_splice_init(&adapter->completed_list, &clist);
2204
2205 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2206
2207
2208 list_for_each_entry_safe(scb, tmp, &clist, list) {
2209
2210 status = scb->status;
2211 scp = scb->scp;
2212 ccb = (mbox_ccb_t *)scb->ccb;
2213 pthru = ccb->pthru;
2214 epthru = ccb->epthru;
2215 mbox = ccb->mbox;
2216
2217 // Make sure f/w has completed a valid command
2218 if (scb->state != SCB_ISSUED) {
2219 con_log(CL_ANN, (KERN_CRIT
2220 "megaraid critical err: invalid command %d:%d:%p\n",
2221 scb->sno, scb->state, scp));
2222 BUG();
2223 continue; // Must never happen!
2224 }
2225
2226 // check for the management command and complete it right away
2227 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2228 scb->state = SCB_FREE;
2229 scb->status = status;
2230
2231 // remove from local clist
2232 list_del_init(&scb->list);
2233
2234 kioc = (uioc_t *)scb->gp;
2235 kioc->status = 0;
2236
2237 megaraid_mbox_mm_done(adapter, scb);
2238
2239 continue;
2240 }
2241
2242 // Was an abort issued for this command earlier
2243 if (scb->state & SCB_ABORT) {
2244 con_log(CL_ANN, (KERN_NOTICE
2245 "megaraid: aborted cmd [%x] completed\n",
2246 scb->sno));
2247 }
2248
2249 /*
2250 * If the inquiry came of a disk drive which is not part of
2251 * any RAID array, expose it to the kernel. For this to be
2252 * enabled, user must set the "megaraid_expose_unconf_disks"
2253 * flag to 1 by specifying it on module parameter list.
2254 * This would enable data migration off drives from other
2255 * configurations.
2256 */
2257 islogical = MRAID_IS_LOGICAL(adapter, scp);
2258 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2259 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2260
2261 sgl = scsi_sglist(scp);
2262 if (sg_page(sgl)) {
2263 c = *(unsigned char *) sg_virt(&sgl[0]);
2264 } else {
2265 con_log(CL_ANN, (KERN_WARNING
2266 "megaraid mailbox: invalid sg:%d\n",
2267 __LINE__));
2268 c = 0;
2269 }
2270
2271 if ((c & 0x1F ) == TYPE_DISK) {
2272 pdev_index = (scb->dev_channel * 16) +
2273 scb->dev_target;
2274 pdev_state =
2275 raid_dev->pdrv_state[pdev_index] & 0x0F;
2276
2277 if (pdev_state == PDRV_ONLINE ||
2278 pdev_state == PDRV_FAILED ||
2279 pdev_state == PDRV_RBLD ||
2280 pdev_state == PDRV_HOTSPARE ||
2281 megaraid_expose_unconf_disks == 0) {
2282
2283 status = 0xF0;
2284 }
2285 }
2286 }
2287
2288 // Convert MegaRAID status to Linux error code
2289 switch (status) {
2290
2291 case 0x00:
2292
2293 scp->result = (DID_OK << 16);
2294 break;
2295
2296 case 0x02:
2297
2298 /* set sense_buffer and result fields */
2299 if (mbox->cmd == MBOXCMD_PASSTHRU ||
2300 mbox->cmd == MBOXCMD_PASSTHRU64) {
2301
2302 memcpy(scp->sense_buffer, pthru->reqsensearea,
2303 14);
2304
2305 scp->result = SAM_STAT_CHECK_CONDITION;
2306 }
2307 else {
2308 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2309
2310 memcpy(scp->sense_buffer,
2311 epthru->reqsensearea, 14);
2312
2313 scp->result = SAM_STAT_CHECK_CONDITION;
2314 } else
2315 scsi_build_sense(scp, 0,
2316 ABORTED_COMMAND, 0, 0);
2317 }
2318 break;
2319
2320 case 0x08:
2321
2322 scp->result = DID_BUS_BUSY << 16 | status;
2323 break;
2324
2325 default:
2326
2327 /*
2328 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2329 * failed
2330 */
2331 if (scp->cmnd[0] == TEST_UNIT_READY) {
2332 scp->result = DID_ERROR << 16 |
2333 SAM_STAT_RESERVATION_CONFLICT;
2334 }
2335 else
2336 /*
2337 * Error code returned is 1 if Reserve or Release
2338 * failed or the input parameter is invalid
2339 */
2340 if (status == 1 && (scp->cmnd[0] == RESERVE_6 ||
2341 scp->cmnd[0] == RELEASE_6)) {
2342
2343 scp->result = DID_ERROR << 16 |
2344 SAM_STAT_RESERVATION_CONFLICT;
2345 }
2346 else {
2347 scp->result = DID_BAD_TARGET << 16 | status;
2348 }
2349 }
2350
2351 // print a debug message for all failed commands
2352 if (status) {
2353 megaraid_mbox_display_scb(adapter, scb);
2354 }
2355
2356 scsi_dma_unmap(scp);
2357
2358 // remove from local clist
2359 list_del_init(&scb->list);
2360
2361 // put back in free list
2362 megaraid_dealloc_scb(adapter, scb);
2363
2364 // send the scsi packet back to kernel
2365 scsi_done(scp);
2366 }
2367
2368 return;
2369 }
2370
2371
2372 /**
2373 * megaraid_abort_handler - abort the scsi command
2374 * @scp : command to be aborted
2375 *
2376 * Abort a previous SCSI request. Only commands on the pending list can be
2377 * aborted. All the commands issued to the F/W must complete.
2378 **/
2379 static int
megaraid_abort_handler(struct scsi_cmnd * scp)2380 megaraid_abort_handler(struct scsi_cmnd *scp)
2381 {
2382 adapter_t *adapter;
2383 mraid_device_t *raid_dev;
2384 scb_t *scb;
2385 scb_t *tmp;
2386 int found;
2387 unsigned long flags;
2388 int i;
2389
2390
2391 adapter = SCP2ADAPTER(scp);
2392 raid_dev = ADAP2RAIDDEV(adapter);
2393
2394 con_log(CL_ANN, (KERN_WARNING
2395 "megaraid: aborting cmd=%x <c=%d t=%d l=%d>\n",
2396 scp->cmnd[0], SCP2CHANNEL(scp),
2397 SCP2TARGET(scp), SCP2LUN(scp)));
2398
2399 // If FW has stopped responding, simply return failure
2400 if (raid_dev->hw_error) {
2401 con_log(CL_ANN, (KERN_NOTICE
2402 "megaraid: hw error, not aborting\n"));
2403 return FAILED;
2404 }
2405
2406 // There might a race here, where the command was completed by the
2407 // firmware and now it is on the completed list. Before we could
2408 // complete the command to the kernel in dpc, the abort came.
2409 // Find out if this is the case to avoid the race.
2410 scb = NULL;
2411 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2412 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2413
2414 if (scb->scp == scp) { // Found command
2415
2416 list_del_init(&scb->list); // from completed list
2417
2418 con_log(CL_ANN, (KERN_WARNING
2419 "megaraid: %d[%d:%d], abort from completed list\n",
2420 scb->sno, scb->dev_channel, scb->dev_target));
2421
2422 scp->result = (DID_ABORT << 16);
2423 scsi_done(scp);
2424
2425 megaraid_dealloc_scb(adapter, scb);
2426
2427 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2428 flags);
2429
2430 return SUCCESS;
2431 }
2432 }
2433 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2434
2435
2436 // Find out if this command is still on the pending list. If it is and
2437 // was never issued, abort and return success. If the command is owned
2438 // by the firmware, we must wait for it to complete by the FW.
2439 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2440 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2441
2442 if (scb->scp == scp) { // Found command
2443
2444 list_del_init(&scb->list); // from pending list
2445
2446 ASSERT(!(scb->state & SCB_ISSUED));
2447
2448 con_log(CL_ANN, (KERN_WARNING
2449 "megaraid abort: [%d:%d], driver owner\n",
2450 scb->dev_channel, scb->dev_target));
2451
2452 scp->result = (DID_ABORT << 16);
2453 scsi_done(scp);
2454
2455 megaraid_dealloc_scb(adapter, scb);
2456
2457 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2458 flags);
2459
2460 return SUCCESS;
2461 }
2462 }
2463 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2464
2465
2466 // Check do we even own this command, in which case this would be
2467 // owned by the firmware. The only way to locate the FW scb is to
2468 // traverse through the list of all SCB, since driver does not
2469 // maintain these SCBs on any list
2470 found = 0;
2471 spin_lock_irq(&adapter->lock);
2472 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2473 scb = adapter->kscb_list + i;
2474
2475 if (scb->scp == scp) {
2476
2477 found = 1;
2478
2479 if (!(scb->state & SCB_ISSUED)) {
2480 con_log(CL_ANN, (KERN_WARNING
2481 "megaraid abort: %d[%d:%d], invalid state\n",
2482 scb->sno, scb->dev_channel, scb->dev_target));
2483 BUG();
2484 }
2485 else {
2486 con_log(CL_ANN, (KERN_WARNING
2487 "megaraid abort: %d[%d:%d], fw owner\n",
2488 scb->sno, scb->dev_channel, scb->dev_target));
2489 }
2490 }
2491 }
2492 spin_unlock_irq(&adapter->lock);
2493
2494 if (!found) {
2495 con_log(CL_ANN, (KERN_WARNING "megaraid abort: do now own\n"));
2496
2497 // FIXME: Should there be a callback for this command?
2498 return SUCCESS;
2499 }
2500
2501 // We cannot actually abort a command owned by firmware, return
2502 // failure and wait for reset. In host reset handler, we will find out
2503 // if the HBA is still live
2504 return FAILED;
2505 }
2506
2507 /**
2508 * megaraid_reset_handler - device reset handler for mailbox based driver
2509 * @scp : reference command
2510 *
2511 * Reset handler for the mailbox based controller. First try to find out if
2512 * the FW is still live, in which case the outstanding commands counter mut go
2513 * down to 0. If that happens, also issue the reservation reset command to
2514 * relinquish (possible) reservations on the logical drives connected to this
2515 * host.
2516 **/
2517 static int
megaraid_reset_handler(struct scsi_cmnd * scp)2518 megaraid_reset_handler(struct scsi_cmnd *scp)
2519 {
2520 adapter_t *adapter;
2521 scb_t *scb;
2522 scb_t *tmp;
2523 mraid_device_t *raid_dev;
2524 unsigned long flags;
2525 uint8_t raw_mbox[sizeof(mbox_t)];
2526 int rval;
2527 int recovery_window;
2528 int i;
2529 uioc_t *kioc;
2530
2531 adapter = SCP2ADAPTER(scp);
2532 raid_dev = ADAP2RAIDDEV(adapter);
2533
2534 // return failure if adapter is not responding
2535 if (raid_dev->hw_error) {
2536 con_log(CL_ANN, (KERN_NOTICE
2537 "megaraid: hw error, cannot reset\n"));
2538 return FAILED;
2539 }
2540
2541 // Under exceptional conditions, FW can take up to 3 minutes to
2542 // complete command processing. Wait for additional 2 minutes for the
2543 // pending commands counter to go down to 0. If it doesn't, let the
2544 // controller be marked offline
2545 // Also, reset all the commands currently owned by the driver
2546 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2547 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2548 list_del_init(&scb->list); // from pending list
2549
2550 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2551 con_log(CL_ANN, (KERN_WARNING
2552 "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2553 scb->sno, scb->dev_channel, scb->dev_target));
2554
2555 scb->status = -1;
2556
2557 kioc = (uioc_t *)scb->gp;
2558 kioc->status = -EFAULT;
2559
2560 megaraid_mbox_mm_done(adapter, scb);
2561 } else {
2562 if (scb->scp == scp) { // Found command
2563 con_log(CL_ANN, (KERN_WARNING
2564 "megaraid: %d[%d:%d], reset from pending list\n",
2565 scb->sno, scb->dev_channel, scb->dev_target));
2566 } else {
2567 con_log(CL_ANN, (KERN_WARNING
2568 "megaraid: IO packet with %d[%d:%d] being reset\n",
2569 scb->sno, scb->dev_channel, scb->dev_target));
2570 }
2571
2572 scb->scp->result = (DID_RESET << 16);
2573 scsi_done(scb->scp);
2574
2575 megaraid_dealloc_scb(adapter, scb);
2576 }
2577 }
2578 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2579
2580 if (adapter->outstanding_cmds) {
2581 con_log(CL_ANN, (KERN_NOTICE
2582 "megaraid: %d outstanding commands. Max wait %d sec\n",
2583 adapter->outstanding_cmds,
2584 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
2585 }
2586
2587 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2588
2589 for (i = 0; i < recovery_window; i++) {
2590
2591 megaraid_ack_sequence(adapter);
2592
2593 // print a message once every 5 seconds only
2594 if (!(i % 5)) {
2595 con_log(CL_ANN, (
2596 "megaraid mbox: Wait for %d commands to complete:%d\n",
2597 adapter->outstanding_cmds,
2598 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
2599 }
2600
2601 // bailout if no recovery happened in reset time
2602 if (adapter->outstanding_cmds == 0) {
2603 break;
2604 }
2605
2606 msleep(1000);
2607 }
2608
2609 spin_lock(&adapter->lock);
2610
2611 // If still outstanding commands, bail out
2612 if (adapter->outstanding_cmds) {
2613 con_log(CL_ANN, (KERN_WARNING
2614 "megaraid mbox: critical hardware error!\n"));
2615
2616 raid_dev->hw_error = 1;
2617
2618 rval = FAILED;
2619 goto out;
2620 }
2621 else {
2622 con_log(CL_ANN, (KERN_NOTICE
2623 "megaraid mbox: reset sequence completed successfully\n"));
2624 }
2625
2626
2627 // If the controller supports clustering, reset reservations
2628 if (!adapter->ha) {
2629 rval = SUCCESS;
2630 goto out;
2631 }
2632
2633 // clear reservations if any
2634 raw_mbox[0] = CLUSTER_CMD;
2635 raw_mbox[2] = RESET_RESERVATIONS;
2636
2637 rval = SUCCESS;
2638 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2639 con_log(CL_ANN,
2640 (KERN_INFO "megaraid: reservation reset\n"));
2641 }
2642 else {
2643 rval = FAILED;
2644 con_log(CL_ANN, (KERN_WARNING
2645 "megaraid: reservation reset failed\n"));
2646 }
2647
2648 out:
2649 spin_unlock(&adapter->lock);
2650 return rval;
2651 }
2652
2653 /*
2654 * START: internal commands library
2655 *
2656 * This section of the driver has the common routine used by the driver and
2657 * also has all the FW routines
2658 */
2659
2660 /**
2661 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2662 * @adapter : controller's soft state
2663 * @raw_mbox : the mailbox
2664 *
2665 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2666 * controllers.
2667 */
2668 static int
mbox_post_sync_cmd(adapter_t * adapter,uint8_t raw_mbox[])2669 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2670 {
2671 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2672 mbox_t *mbox;
2673 uint8_t status;
2674 int i;
2675
2676 mbox = raid_dev->mbox;
2677
2678 /*
2679 * Wait until mailbox is free
2680 */
2681 if (megaraid_busywait_mbox(raid_dev) != 0)
2682 goto blocked_mailbox;
2683
2684 /*
2685 * Copy mailbox data into host structure
2686 */
2687 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2688 mbox->cmdid = 0xFE;
2689 mbox->busy = 1;
2690 mbox->poll = 0;
2691 mbox->ack = 0;
2692 mbox->numstatus = 0xFF;
2693 mbox->status = 0xFF;
2694
2695 wmb();
2696 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2697
2698 // wait for maximum 1 second for status to post. If the status is not
2699 // available within 1 second, assume FW is initializing and wait
2700 // for an extended amount of time
2701 if (mbox->numstatus == 0xFF) { // status not yet available
2702 udelay(25);
2703
2704 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2705 rmb();
2706 msleep(1);
2707 }
2708
2709
2710 if (i == 1000) {
2711 con_log(CL_ANN, (KERN_NOTICE
2712 "megaraid mailbox: wait for FW to boot "));
2713
2714 for (i = 0; (mbox->numstatus == 0xFF) &&
2715 (i < MBOX_RESET_WAIT); i++) {
2716 rmb();
2717 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2718 MBOX_RESET_WAIT - i));
2719 msleep(1000);
2720 }
2721
2722 if (i == MBOX_RESET_WAIT) {
2723
2724 con_log(CL_ANN, (
2725 "\nmegaraid mailbox: status not available\n"));
2726
2727 return -1;
2728 }
2729 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2730 }
2731 }
2732
2733 // wait for maximum 1 second for poll semaphore
2734 if (mbox->poll != 0x77) {
2735 udelay(25);
2736
2737 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2738 rmb();
2739 msleep(1);
2740 }
2741
2742 if (i == 1000) {
2743 con_log(CL_ANN, (KERN_WARNING
2744 "megaraid mailbox: could not get poll semaphore\n"));
2745 return -1;
2746 }
2747 }
2748
2749 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2750 wmb();
2751
2752 // wait for maximum 1 second for acknowledgement
2753 if (RDINDOOR(raid_dev) & 0x2) {
2754 udelay(25);
2755
2756 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2757 rmb();
2758 msleep(1);
2759 }
2760
2761 if (i == 1000) {
2762 con_log(CL_ANN, (KERN_WARNING
2763 "megaraid mailbox: could not acknowledge\n"));
2764 return -1;
2765 }
2766 }
2767 mbox->poll = 0;
2768 mbox->ack = 0x77;
2769
2770 status = mbox->status;
2771
2772 // invalidate the completed command id array. After command
2773 // completion, firmware would write the valid id.
2774 mbox->numstatus = 0xFF;
2775 mbox->status = 0xFF;
2776 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2777 mbox->completed[i] = 0xFF;
2778 }
2779
2780 return status;
2781
2782 blocked_mailbox:
2783
2784 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2785 return -1;
2786 }
2787
2788
2789 /**
2790 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2791 * @adapter : controller's soft state
2792 * @raw_mbox : the mailbox
2793 *
2794 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2795 * controllers. This is a faster version of the synchronous command and
2796 * therefore can be called in interrupt-context as well.
2797 */
2798 static int
mbox_post_sync_cmd_fast(adapter_t * adapter,uint8_t raw_mbox[])2799 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2800 {
2801 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2802 mbox_t *mbox;
2803 long i;
2804
2805
2806 mbox = raid_dev->mbox;
2807
2808 // return immediately if the mailbox is busy
2809 if (mbox->busy) return -1;
2810
2811 // Copy mailbox data into host structure
2812 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2813 mbox->cmdid = 0xFE;
2814 mbox->busy = 1;
2815 mbox->poll = 0;
2816 mbox->ack = 0;
2817 mbox->numstatus = 0xFF;
2818 mbox->status = 0xFF;
2819
2820 wmb();
2821 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2822
2823 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
2824 if (mbox->numstatus != 0xFF) break;
2825 rmb();
2826 udelay(MBOX_SYNC_DELAY_200);
2827 }
2828
2829 if (i == MBOX_SYNC_WAIT_CNT) {
2830 // We may need to re-calibrate the counter
2831 con_log(CL_ANN, (KERN_CRIT
2832 "megaraid: fast sync command timed out\n"));
2833 }
2834
2835 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2836 wmb();
2837
2838 return mbox->status;
2839 }
2840
2841
2842 /**
2843 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
2844 * @raid_dev : RAID device (HBA) soft state
2845 *
2846 * Wait until the controller's mailbox is available to accept more commands.
2847 * Wait for at most 1 second.
2848 */
2849 static int
megaraid_busywait_mbox(mraid_device_t * raid_dev)2850 megaraid_busywait_mbox(mraid_device_t *raid_dev)
2851 {
2852 mbox_t *mbox = raid_dev->mbox;
2853 int i = 0;
2854
2855 if (mbox->busy) {
2856 udelay(25);
2857 for (i = 0; mbox->busy && i < 1000; i++)
2858 msleep(1);
2859 }
2860
2861 if (i < 1000) return 0;
2862 else return -1;
2863 }
2864
2865
2866 /**
2867 * megaraid_mbox_product_info - some static information about the controller
2868 * @adapter : our soft state
2869 *
2870 * Issue commands to the controller to grab some parameters required by our
2871 * caller.
2872 */
2873 static int
megaraid_mbox_product_info(adapter_t * adapter)2874 megaraid_mbox_product_info(adapter_t *adapter)
2875 {
2876 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2877 mbox_t *mbox;
2878 uint8_t raw_mbox[sizeof(mbox_t)];
2879 mraid_pinfo_t *pinfo;
2880 dma_addr_t pinfo_dma_h;
2881 mraid_inquiry3_t *mraid_inq3;
2882 int i;
2883
2884
2885 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2886 mbox = (mbox_t *)raw_mbox;
2887
2888 /*
2889 * Issue an ENQUIRY3 command to find out certain adapter parameters,
2890 * e.g., max channels, max commands etc.
2891 */
2892 pinfo = dma_alloc_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t),
2893 &pinfo_dma_h, GFP_KERNEL);
2894 if (pinfo == NULL) {
2895 con_log(CL_ANN, (KERN_WARNING
2896 "megaraid: out of memory, %s %d\n", __func__,
2897 __LINE__));
2898
2899 return -1;
2900 }
2901
2902 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
2903 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
2904
2905 raw_mbox[0] = FC_NEW_CONFIG;
2906 raw_mbox[2] = NC_SUBOP_ENQUIRY3;
2907 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
2908
2909 // Issue the command
2910 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
2911
2912 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
2913
2914 dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t),
2915 pinfo, pinfo_dma_h);
2916
2917 return -1;
2918 }
2919
2920 /*
2921 * Collect information about state of each physical drive
2922 * attached to the controller. We will expose all the disks
2923 * which are not part of RAID
2924 */
2925 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
2926 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
2927 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
2928 }
2929
2930 /*
2931 * Get product info for information like number of channels,
2932 * maximum commands supported.
2933 */
2934 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2935 mbox->xferaddr = (uint32_t)pinfo_dma_h;
2936
2937 raw_mbox[0] = FC_NEW_CONFIG;
2938 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
2939
2940 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
2941
2942 con_log(CL_ANN, (KERN_WARNING
2943 "megaraid: product info failed\n"));
2944
2945 dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t),
2946 pinfo, pinfo_dma_h);
2947
2948 return -1;
2949 }
2950
2951 /*
2952 * Setup some parameters for host, as required by our caller
2953 */
2954 adapter->max_channel = pinfo->nchannels;
2955
2956 /*
2957 * we will export all the logical drives on a single channel.
2958 * Add 1 since inquires do not come for inititor ID
2959 */
2960 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1;
2961 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices
2962
2963 /*
2964 * These are the maximum outstanding commands for the scsi-layer
2965 */
2966 adapter->max_cmds = MBOX_MAX_SCSI_CMDS;
2967
2968 memset(adapter->fw_version, 0, VERSION_SIZE);
2969 memset(adapter->bios_version, 0, VERSION_SIZE);
2970
2971 memcpy(adapter->fw_version, pinfo->fw_version, 4);
2972 adapter->fw_version[4] = 0;
2973
2974 memcpy(adapter->bios_version, pinfo->bios_version, 4);
2975 adapter->bios_version[4] = 0;
2976
2977 con_log(CL_ANN, (KERN_NOTICE
2978 "megaraid: fw version:[%s] bios version:[%s]\n",
2979 adapter->fw_version, adapter->bios_version));
2980
2981 dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), pinfo,
2982 pinfo_dma_h);
2983
2984 return 0;
2985 }
2986
2987
2988
2989 /**
2990 * megaraid_mbox_extended_cdb - check for support for extended CDBs
2991 * @adapter : soft state for the controller
2992 *
2993 * This routine check whether the controller in question supports extended
2994 * ( > 10 bytes ) CDBs.
2995 */
2996 static int
megaraid_mbox_extended_cdb(adapter_t * adapter)2997 megaraid_mbox_extended_cdb(adapter_t *adapter)
2998 {
2999 mbox_t *mbox;
3000 uint8_t raw_mbox[sizeof(mbox_t)];
3001 int rval;
3002
3003 mbox = (mbox_t *)raw_mbox;
3004
3005 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3006 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3007
3008 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3009
3010 raw_mbox[0] = MAIN_MISC_OPCODE;
3011 raw_mbox[2] = SUPPORT_EXT_CDB;
3012
3013 /*
3014 * Issue the command
3015 */
3016 rval = 0;
3017 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3018 rval = -1;
3019 }
3020
3021 return rval;
3022 }
3023
3024
3025 /**
3026 * megaraid_mbox_support_ha - Do we support clustering
3027 * @adapter : soft state for the controller
3028 * @init_id : ID of the initiator
3029 *
3030 * Determine if the firmware supports clustering and the ID of the initiator.
3031 */
3032 static int
megaraid_mbox_support_ha(adapter_t * adapter,uint16_t * init_id)3033 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3034 {
3035 mbox_t *mbox;
3036 uint8_t raw_mbox[sizeof(mbox_t)];
3037 int rval;
3038
3039
3040 mbox = (mbox_t *)raw_mbox;
3041
3042 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3043
3044 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3045
3046 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3047
3048 raw_mbox[0] = GET_TARGET_ID;
3049
3050 // Issue the command
3051 *init_id = 7;
3052 rval = -1;
3053 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3054
3055 *init_id = *(uint8_t *)adapter->ibuf;
3056
3057 con_log(CL_ANN, (KERN_INFO
3058 "megaraid: cluster firmware, initiator ID: %d\n",
3059 *init_id));
3060
3061 rval = 0;
3062 }
3063
3064 return rval;
3065 }
3066
3067
3068 /**
3069 * megaraid_mbox_support_random_del - Do we support random deletion
3070 * @adapter : soft state for the controller
3071 *
3072 * Determine if the firmware supports random deletion.
3073 * Return: 1 is operation supported, 0 otherwise
3074 */
3075 static int
megaraid_mbox_support_random_del(adapter_t * adapter)3076 megaraid_mbox_support_random_del(adapter_t *adapter)
3077 {
3078 uint8_t raw_mbox[sizeof(mbox_t)];
3079 int rval;
3080
3081 /*
3082 * Newer firmware on Dell CERC expect a different
3083 * random deletion handling, so disable it.
3084 */
3085 if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI &&
3086 adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 &&
3087 adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
3088 adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH &&
3089 (adapter->fw_version[0] > '6' ||
3090 (adapter->fw_version[0] == '6' &&
3091 adapter->fw_version[2] > '6') ||
3092 (adapter->fw_version[0] == '6'
3093 && adapter->fw_version[2] == '6'
3094 && adapter->fw_version[3] > '1'))) {
3095 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n"));
3096 return 0;
3097 }
3098
3099 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3100
3101 raw_mbox[0] = FC_DEL_LOGDRV;
3102 raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3103
3104 // Issue the command
3105 rval = 0;
3106 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3107
3108 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3109
3110 rval = 1;
3111 }
3112
3113 return rval;
3114 }
3115
3116
3117 /**
3118 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3119 * @adapter : soft state for the controller
3120 *
3121 * Find out the maximum number of scatter-gather elements supported by the
3122 * firmware.
3123 */
3124 static int
megaraid_mbox_get_max_sg(adapter_t * adapter)3125 megaraid_mbox_get_max_sg(adapter_t *adapter)
3126 {
3127 mbox_t *mbox;
3128 uint8_t raw_mbox[sizeof(mbox_t)];
3129 int nsg;
3130
3131
3132 mbox = (mbox_t *)raw_mbox;
3133
3134 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3135
3136 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3137
3138 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3139
3140 raw_mbox[0] = MAIN_MISC_OPCODE;
3141 raw_mbox[2] = GET_MAX_SG_SUPPORT;
3142
3143 // Issue the command
3144 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3145 nsg = *(uint8_t *)adapter->ibuf;
3146 }
3147 else {
3148 nsg = MBOX_DEFAULT_SG_SIZE;
3149 }
3150
3151 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3152
3153 return nsg;
3154 }
3155
3156
3157 /**
3158 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3159 * @adapter : soft state for the controller
3160 *
3161 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3162 * can be exported as regular SCSI channels.
3163 */
3164 static void
megaraid_mbox_enum_raid_scsi(adapter_t * adapter)3165 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3166 {
3167 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3168 mbox_t *mbox;
3169 uint8_t raw_mbox[sizeof(mbox_t)];
3170
3171
3172 mbox = (mbox_t *)raw_mbox;
3173
3174 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3175
3176 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3177
3178 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3179
3180 raw_mbox[0] = CHNL_CLASS;
3181 raw_mbox[2] = GET_CHNL_CLASS;
3182
3183 // Issue the command. If the command fails, all channels are RAID
3184 // channels
3185 raid_dev->channel_class = 0xFF;
3186 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3187 raid_dev->channel_class = *(uint8_t *)adapter->ibuf;
3188 }
3189
3190 return;
3191 }
3192
3193
3194 /**
3195 * megaraid_mbox_flush_cache - flush adapter and disks cache
3196 * @adapter : soft state for the controller
3197 *
3198 * Flush adapter cache followed by disks cache.
3199 */
3200 static void
megaraid_mbox_flush_cache(adapter_t * adapter)3201 megaraid_mbox_flush_cache(adapter_t *adapter)
3202 {
3203 uint8_t raw_mbox[sizeof(mbox_t)];
3204
3205 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3206
3207 raw_mbox[0] = FLUSH_ADAPTER;
3208
3209 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3210 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3211 }
3212
3213 raw_mbox[0] = FLUSH_SYSTEM;
3214
3215 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3216 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3217 }
3218
3219 return;
3220 }
3221
3222
3223 /**
3224 * megaraid_mbox_fire_sync_cmd - fire the sync cmd
3225 * @adapter : soft state for the controller
3226 *
3227 * Clears the pending cmds in FW and reinits its RAID structs.
3228 */
3229 static int
megaraid_mbox_fire_sync_cmd(adapter_t * adapter)3230 megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3231 {
3232 mbox_t *mbox;
3233 uint8_t raw_mbox[sizeof(mbox_t)];
3234 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3235 int status = 0;
3236 int i;
3237 uint32_t dword;
3238
3239 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3240
3241 raw_mbox[0] = 0xFF;
3242
3243 mbox = raid_dev->mbox;
3244
3245 /* Wait until mailbox is free */
3246 if (megaraid_busywait_mbox(raid_dev) != 0) {
3247 status = 1;
3248 goto blocked_mailbox;
3249 }
3250
3251 /* Copy mailbox data into host structure */
3252 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3253 mbox->cmdid = 0xFE;
3254 mbox->busy = 1;
3255 mbox->poll = 0;
3256 mbox->ack = 0;
3257 mbox->numstatus = 0;
3258 mbox->status = 0;
3259
3260 wmb();
3261 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3262
3263 /* Wait for maximum 1 min for status to post.
3264 * If the Firmware SUPPORTS the ABOVE COMMAND,
3265 * mbox->cmd will be set to 0
3266 * else
3267 * the firmware will reject the command with
3268 * mbox->numstatus set to 1
3269 */
3270
3271 i = 0;
3272 status = 0;
3273 while (!mbox->numstatus && mbox->cmd == 0xFF) {
3274 rmb();
3275 msleep(1);
3276 i++;
3277 if (i > 1000 * 60) {
3278 status = 1;
3279 break;
3280 }
3281 }
3282 if (mbox->numstatus == 1)
3283 status = 1; /*cmd not supported*/
3284
3285 /* Check for interrupt line */
3286 dword = RDOUTDOOR(raid_dev);
3287 WROUTDOOR(raid_dev, dword);
3288 WRINDOOR(raid_dev,2);
3289
3290 return status;
3291
3292 blocked_mailbox:
3293 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3294 return status;
3295 }
3296
3297 /**
3298 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3299 * @adapter : controller's soft state
3300 * @scb : SCB to be displayed
3301 *
3302 * Diplay information about the given SCB iff the current debug level is
3303 * verbose.
3304 */
3305 static void
megaraid_mbox_display_scb(adapter_t * adapter,scb_t * scb)3306 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3307 {
3308 mbox_ccb_t *ccb;
3309 struct scsi_cmnd *scp;
3310 mbox_t *mbox;
3311 int level;
3312 int i;
3313
3314
3315 ccb = (mbox_ccb_t *)scb->ccb;
3316 scp = scb->scp;
3317 mbox = ccb->mbox;
3318
3319 level = CL_DLEVEL3;
3320
3321 con_log(level, (KERN_NOTICE
3322 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3323 mbox->cmd, scb->sno));
3324
3325 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3326 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3327 mbox->numsge));
3328
3329 if (!scp) return;
3330
3331 con_log(level, (KERN_NOTICE "scsi cmnd: "));
3332
3333 for (i = 0; i < scp->cmd_len; i++) {
3334 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3335 }
3336
3337 con_log(level, ("\n"));
3338
3339 return;
3340 }
3341
3342
3343 /**
3344 * megaraid_mbox_setup_device_map - manage device ids
3345 * @adapter : Driver's soft state
3346 *
3347 * Manage the device ids to have an appropriate mapping between the kernel
3348 * scsi addresses and megaraid scsi and logical drive addresses. We export
3349 * scsi devices on their actual addresses, whereas the logical drives are
3350 * exported on a virtual scsi channel.
3351 */
3352 static void
megaraid_mbox_setup_device_map(adapter_t * adapter)3353 megaraid_mbox_setup_device_map(adapter_t *adapter)
3354 {
3355 uint8_t c;
3356 uint8_t t;
3357
3358 /*
3359 * First fill the values on the logical drive channel
3360 */
3361 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3362 adapter->device_ids[adapter->max_channel][t] =
3363 (t < adapter->init_id) ? t : t - 1;
3364
3365 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3366
3367 /*
3368 * Fill the values on the physical devices channels
3369 */
3370 for (c = 0; c < adapter->max_channel; c++)
3371 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3372 adapter->device_ids[c][t] = (c << 8) | t;
3373 }
3374
3375
3376 /*
3377 * END: internal commands library
3378 */
3379
3380 /*
3381 * START: Interface for the common management module
3382 *
3383 * This is the module, which interfaces with the common management module to
3384 * provide support for ioctl and sysfs
3385 */
3386
3387 /**
3388 * megaraid_cmm_register - register with the management module
3389 * @adapter : HBA soft state
3390 *
3391 * Register with the management module, which allows applications to issue
3392 * ioctl calls to the drivers. This interface is used by the management module
3393 * to setup sysfs support as well.
3394 */
3395 static int
megaraid_cmm_register(adapter_t * adapter)3396 megaraid_cmm_register(adapter_t *adapter)
3397 {
3398 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3399 mraid_mmadp_t adp;
3400 scb_t *scb;
3401 mbox_ccb_t *ccb;
3402 int rval;
3403 int i;
3404
3405 // Allocate memory for the base list of scb for management module.
3406 adapter->uscb_list = kzalloc_objs(scb_t, MBOX_MAX_USER_CMDS);
3407
3408 if (adapter->uscb_list == NULL) {
3409 con_log(CL_ANN, (KERN_WARNING
3410 "megaraid: out of memory, %s %d\n", __func__,
3411 __LINE__));
3412 return -1;
3413 }
3414
3415
3416 // Initialize the synchronization parameters for resources for
3417 // commands for management module
3418 INIT_LIST_HEAD(&adapter->uscb_pool);
3419
3420 spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3421
3422
3423
3424 // link all the packets. Note, CCB for commands, coming from the
3425 // commom management module, mailbox physical address are already
3426 // setup by it. We just need placeholder for that in our local command
3427 // control blocks
3428 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3429
3430 scb = adapter->uscb_list + i;
3431 ccb = raid_dev->uccb_list + i;
3432
3433 scb->ccb = (caddr_t)ccb;
3434 ccb->mbox64 = raid_dev->umbox64 + i;
3435 ccb->mbox = &ccb->mbox64->mbox32;
3436 ccb->raw_mbox = (uint8_t *)ccb->mbox;
3437
3438 scb->gp = 0;
3439
3440 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3441 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3442 scb->sno = i + MBOX_MAX_SCSI_CMDS;
3443
3444 scb->scp = NULL;
3445 scb->state = SCB_FREE;
3446 scb->dma_direction = DMA_NONE;
3447 scb->dma_type = MRAID_DMA_NONE;
3448 scb->dev_channel = -1;
3449 scb->dev_target = -1;
3450
3451 // put scb in the free pool
3452 list_add_tail(&scb->list, &adapter->uscb_pool);
3453 }
3454
3455 adp.unique_id = adapter->unique_id;
3456 adp.drvr_type = DRVRTYPE_MBOX;
3457 adp.drvr_data = (unsigned long)adapter;
3458 adp.pdev = adapter->pdev;
3459 adp.issue_uioc = megaraid_mbox_mm_handler;
3460 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
3461 adp.max_kioc = MBOX_MAX_USER_CMDS;
3462
3463 if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3464
3465 con_log(CL_ANN, (KERN_WARNING
3466 "megaraid mbox: did not register with CMM\n"));
3467
3468 kfree(adapter->uscb_list);
3469 }
3470
3471 return rval;
3472 }
3473
3474
3475 /**
3476 * megaraid_cmm_unregister - un-register with the management module
3477 * @adapter : HBA soft state
3478 *
3479 * Un-register with the management module.
3480 * FIXME: mgmt module must return failure for unregister if it has pending
3481 * commands in LLD.
3482 */
3483 static int
megaraid_cmm_unregister(adapter_t * adapter)3484 megaraid_cmm_unregister(adapter_t *adapter)
3485 {
3486 kfree(adapter->uscb_list);
3487 mraid_mm_unregister_adp(adapter->unique_id);
3488 return 0;
3489 }
3490
3491
3492 /**
3493 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3494 * @drvr_data : LLD specific data
3495 * @kioc : CMM interface packet
3496 * @action : command action
3497 *
3498 * This routine is invoked whenever the Common Management Module (CMM) has a
3499 * command for us. The 'action' parameter specifies if this is a new command
3500 * or otherwise.
3501 */
3502 static int
megaraid_mbox_mm_handler(unsigned long drvr_data,uioc_t * kioc,uint32_t action)3503 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3504 {
3505 adapter_t *adapter;
3506
3507 if (action != IOCTL_ISSUE) {
3508 con_log(CL_ANN, (KERN_WARNING
3509 "megaraid: unsupported management action:%#2x\n",
3510 action));
3511 return (-ENOTSUPP);
3512 }
3513
3514 adapter = (adapter_t *)drvr_data;
3515
3516 // make sure this adapter is not being detached right now.
3517 if (atomic_read(&adapter->being_detached)) {
3518 con_log(CL_ANN, (KERN_WARNING
3519 "megaraid: reject management request, detaching\n"));
3520 return (-ENODEV);
3521 }
3522
3523 switch (kioc->opcode) {
3524
3525 case GET_ADAP_INFO:
3526
3527 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *)
3528 (unsigned long)kioc->buf_vaddr);
3529
3530 kioc->done(kioc);
3531
3532 return kioc->status;
3533
3534 case MBOX_CMD:
3535
3536 return megaraid_mbox_mm_command(adapter, kioc);
3537
3538 default:
3539 kioc->status = (-EINVAL);
3540 kioc->done(kioc);
3541 return (-EINVAL);
3542 }
3543
3544 return 0; // not reached
3545 }
3546
3547 /**
3548 * megaraid_mbox_mm_command - issues commands routed through CMM
3549 * @adapter : HBA soft state
3550 * @kioc : management command packet
3551 *
3552 * Issues commands, which are routed through the management module.
3553 */
3554 static int
megaraid_mbox_mm_command(adapter_t * adapter,uioc_t * kioc)3555 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3556 {
3557 struct list_head *head = &adapter->uscb_pool;
3558 mbox64_t *mbox64;
3559 uint8_t *raw_mbox;
3560 scb_t *scb;
3561 mbox_ccb_t *ccb;
3562 unsigned long flags;
3563
3564 // detach one scb from free pool
3565 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3566
3567 if (list_empty(head)) { // should never happen because of CMM
3568
3569 con_log(CL_ANN, (KERN_WARNING
3570 "megaraid mbox: bug in cmm handler, lost resources\n"));
3571
3572 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3573
3574 return (-EINVAL);
3575 }
3576
3577 scb = list_entry(head->next, scb_t, list);
3578 list_del_init(&scb->list);
3579
3580 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3581
3582 scb->state = SCB_ACTIVE;
3583 scb->dma_type = MRAID_DMA_NONE;
3584 scb->dma_direction = DMA_NONE;
3585
3586 ccb = (mbox_ccb_t *)scb->ccb;
3587 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3588 raw_mbox = (uint8_t *)&mbox64->mbox32;
3589
3590 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3591
3592 scb->gp = (unsigned long)kioc;
3593
3594 /*
3595 * If it is a logdrv random delete operation, we have to wait till
3596 * there are no outstanding cmds at the fw and then issue it directly
3597 */
3598 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3599
3600 if (wait_till_fw_empty(adapter)) {
3601 con_log(CL_ANN, (KERN_NOTICE
3602 "megaraid mbox: LD delete, timed out\n"));
3603
3604 kioc->status = -ETIME;
3605
3606 scb->status = -1;
3607
3608 megaraid_mbox_mm_done(adapter, scb);
3609
3610 return (-ETIME);
3611 }
3612
3613 INIT_LIST_HEAD(&scb->list);
3614
3615 scb->state = SCB_ISSUED;
3616 if (mbox_post_cmd(adapter, scb) != 0) {
3617
3618 con_log(CL_ANN, (KERN_NOTICE
3619 "megaraid mbox: LD delete, mailbox busy\n"));
3620
3621 kioc->status = -EBUSY;
3622
3623 scb->status = -1;
3624
3625 megaraid_mbox_mm_done(adapter, scb);
3626
3627 return (-EBUSY);
3628 }
3629
3630 return 0;
3631 }
3632
3633 // put the command on the pending list and execute
3634 megaraid_mbox_runpendq(adapter, scb);
3635
3636 return 0;
3637 }
3638
3639
3640 static int
wait_till_fw_empty(adapter_t * adapter)3641 wait_till_fw_empty(adapter_t *adapter)
3642 {
3643 unsigned long flags = 0;
3644 int i;
3645
3646
3647 /*
3648 * Set the quiescent flag to stop issuing cmds to FW.
3649 */
3650 spin_lock_irqsave(&adapter->lock, flags);
3651 adapter->quiescent++;
3652 spin_unlock_irqrestore(&adapter->lock, flags);
3653
3654 /*
3655 * Wait till there are no more cmds outstanding at FW. Try for at most
3656 * 60 seconds
3657 */
3658 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3659 con_log(CL_DLEVEL1, (KERN_INFO
3660 "megaraid: FW has %d pending commands\n",
3661 adapter->outstanding_cmds));
3662
3663 msleep(1000);
3664 }
3665
3666 return adapter->outstanding_cmds;
3667 }
3668
3669
3670 /**
3671 * megaraid_mbox_mm_done - callback for CMM commands
3672 * @adapter : HBA soft state
3673 * @scb : completed command
3674 *
3675 * Callback routine for internal commands originated from the management
3676 * module.
3677 */
3678 static void
megaraid_mbox_mm_done(adapter_t * adapter,scb_t * scb)3679 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3680 {
3681 uioc_t *kioc;
3682 mbox64_t *mbox64;
3683 uint8_t *raw_mbox;
3684 unsigned long flags;
3685
3686 kioc = (uioc_t *)scb->gp;
3687 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3688 mbox64->mbox32.status = scb->status;
3689 raw_mbox = (uint8_t *)&mbox64->mbox32;
3690
3691
3692 // put scb in the free pool
3693 scb->state = SCB_FREE;
3694 scb->scp = NULL;
3695
3696 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3697
3698 list_add(&scb->list, &adapter->uscb_pool);
3699
3700 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3701
3702 // if a delete logical drive operation succeeded, restart the
3703 // controller
3704 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3705
3706 adapter->quiescent--;
3707
3708 megaraid_mbox_runpendq(adapter, NULL);
3709 }
3710
3711 kioc->done(kioc);
3712
3713 return;
3714 }
3715
3716
3717 /**
3718 * gather_hbainfo - HBA characteristics for the applications
3719 * @adapter : HBA soft state
3720 * @hinfo : pointer to the caller's host info strucuture
3721 */
3722 static int
gather_hbainfo(adapter_t * adapter,mraid_hba_info_t * hinfo)3723 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3724 {
3725 hinfo->pci_vendor_id = adapter->pdev->vendor;
3726 hinfo->pci_device_id = adapter->pdev->device;
3727 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3728 hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3729
3730 hinfo->pci_bus = adapter->pdev->bus->number;
3731 hinfo->pci_dev_fn = adapter->pdev->devfn;
3732 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn);
3733 hinfo->irq = adapter->host->irq;
3734 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport;
3735
3736 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3737 hinfo->host_no = adapter->host->host_no;
3738
3739 return 0;
3740 }
3741
3742 /*
3743 * END: Interface for the common management module
3744 */
3745
3746
3747
3748 /**
3749 * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3750 * @adapter : controller's soft state
3751 *
3752 * Allocate packets required to issue FW calls whenever the sysfs attributes
3753 * are read. These attributes would require up-to-date information from the
3754 * FW. Also set up resources for mutual exclusion to share these resources and
3755 * the wait queue.
3756 *
3757 * Return 0 on success.
3758 * Return -ERROR_CODE on failure.
3759 */
3760 static int
megaraid_sysfs_alloc_resources(adapter_t * adapter)3761 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3762 {
3763 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3764 int rval = 0;
3765
3766 raid_dev->sysfs_uioc = kmalloc_obj(uioc_t);
3767
3768 raid_dev->sysfs_mbox64 = kmalloc_obj(mbox64_t);
3769
3770 raid_dev->sysfs_buffer = dma_alloc_coherent(&adapter->pdev->dev,
3771 PAGE_SIZE, &raid_dev->sysfs_buffer_dma, GFP_KERNEL);
3772
3773 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3774 !raid_dev->sysfs_buffer) {
3775
3776 con_log(CL_ANN, (KERN_WARNING
3777 "megaraid: out of memory, %s %d\n", __func__,
3778 __LINE__));
3779
3780 rval = -ENOMEM;
3781
3782 megaraid_sysfs_free_resources(adapter);
3783 }
3784
3785 mutex_init(&raid_dev->sysfs_mtx);
3786
3787 init_waitqueue_head(&raid_dev->sysfs_wait_q);
3788
3789 return rval;
3790 }
3791
3792
3793 /**
3794 * megaraid_sysfs_free_resources - free sysfs related resources
3795 * @adapter : controller's soft state
3796 *
3797 * Free packets allocated for sysfs FW commands
3798 */
3799 static void
megaraid_sysfs_free_resources(adapter_t * adapter)3800 megaraid_sysfs_free_resources(adapter_t *adapter)
3801 {
3802 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3803
3804 kfree(raid_dev->sysfs_uioc);
3805 kfree(raid_dev->sysfs_mbox64);
3806
3807 if (raid_dev->sysfs_buffer) {
3808 dma_free_coherent(&adapter->pdev->dev, PAGE_SIZE,
3809 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3810 }
3811 }
3812
3813
3814 /**
3815 * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3816 * @uioc : completed packet
3817 *
3818 * Callback routine called in the ISR/tasklet context for get ldmap call
3819 */
3820 static void
megaraid_sysfs_get_ldmap_done(uioc_t * uioc)3821 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3822 {
3823 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3824 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3825
3826 uioc->status = 0;
3827
3828 wake_up(&raid_dev->sysfs_wait_q);
3829 }
3830
3831 /**
3832 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3833 * @t : timed out timer
3834 *
3835 * Timeout routine to recover and return to application, in case the adapter
3836 * has stopped responding. A timeout of 60 seconds for this command seems like
3837 * a good value.
3838 */
3839 static void
megaraid_sysfs_get_ldmap_timeout(struct timer_list * t)3840 megaraid_sysfs_get_ldmap_timeout(struct timer_list *t)
3841 {
3842 struct uioc_timeout *timeout = timer_container_of(timeout, t, timer);
3843 uioc_t *uioc = timeout->uioc;
3844 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3845 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3846
3847 uioc->status = -ETIME;
3848
3849 wake_up(&raid_dev->sysfs_wait_q);
3850 }
3851
3852
3853 /**
3854 * megaraid_sysfs_get_ldmap - get update logical drive map
3855 * @adapter : controller's soft state
3856 *
3857 * This routine will be called whenever user reads the logical drive
3858 * attributes, go get the current logical drive mapping table from the
3859 * firmware. We use the management API's to issue commands to the controller.
3860 *
3861 * NOTE: The commands issuance functionality is not generalized and
3862 * implemented in context of "get ld map" command only. If required, the
3863 * command issuance logical can be trivially pulled out and implemented as a
3864 * standalone library. For now, this should suffice since there is no other
3865 * user of this interface.
3866 *
3867 * Return 0 on success.
3868 * Return -1 on failure.
3869 */
3870 static int
megaraid_sysfs_get_ldmap(adapter_t * adapter)3871 megaraid_sysfs_get_ldmap(adapter_t *adapter)
3872 {
3873 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3874 uioc_t *uioc;
3875 mbox64_t *mbox64;
3876 mbox_t *mbox;
3877 char *raw_mbox;
3878 struct uioc_timeout timeout;
3879 caddr_t ldmap;
3880 int rval = 0;
3881
3882 /*
3883 * Allow only one read at a time to go through the sysfs attributes
3884 */
3885 mutex_lock(&raid_dev->sysfs_mtx);
3886
3887 uioc = raid_dev->sysfs_uioc;
3888 mbox64 = raid_dev->sysfs_mbox64;
3889 ldmap = raid_dev->sysfs_buffer;
3890
3891 memset(uioc, 0, sizeof(uioc_t));
3892 memset(mbox64, 0, sizeof(mbox64_t));
3893 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
3894
3895 mbox = &mbox64->mbox32;
3896 raw_mbox = (char *)mbox;
3897 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64;
3898 uioc->buf_vaddr = (caddr_t)adapter;
3899 uioc->status = -ENODATA;
3900 uioc->done = megaraid_sysfs_get_ldmap_done;
3901
3902 /*
3903 * Prepare the mailbox packet to get the current logical drive mapping
3904 * table
3905 */
3906 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
3907
3908 raw_mbox[0] = FC_DEL_LOGDRV;
3909 raw_mbox[2] = OP_GET_LDID_MAP;
3910
3911 /*
3912 * Setup a timer to recover from a non-responding controller
3913 */
3914 timeout.uioc = uioc;
3915 timer_setup_on_stack(&timeout.timer,
3916 megaraid_sysfs_get_ldmap_timeout, 0);
3917
3918 timeout.timer.expires = jiffies + 60 * HZ;
3919 add_timer(&timeout.timer);
3920
3921 /*
3922 * Send the command to the firmware
3923 */
3924 rval = megaraid_mbox_mm_command(adapter, uioc);
3925
3926 if (rval == 0) { // command successfully issued
3927 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
3928
3929 /*
3930 * Check if the command timed out
3931 */
3932 if (uioc->status == -ETIME) {
3933 con_log(CL_ANN, (KERN_NOTICE
3934 "megaraid: sysfs get ld map timed out\n"));
3935
3936 rval = -ETIME;
3937 }
3938 else {
3939 rval = mbox->status;
3940 }
3941
3942 if (rval == 0) {
3943 memcpy(raid_dev->curr_ldmap, ldmap,
3944 sizeof(raid_dev->curr_ldmap));
3945 }
3946 else {
3947 con_log(CL_ANN, (KERN_NOTICE
3948 "megaraid: get ld map failed with %x\n", rval));
3949 }
3950 }
3951 else {
3952 con_log(CL_ANN, (KERN_NOTICE
3953 "megaraid: could not issue ldmap command:%x\n", rval));
3954 }
3955
3956
3957 timer_delete_sync(&timeout.timer);
3958 timer_destroy_on_stack(&timeout.timer);
3959
3960 mutex_unlock(&raid_dev->sysfs_mtx);
3961
3962 return rval;
3963 }
3964
3965
3966 /**
3967 * megaraid_mbox_app_hndl_show - display application handle for this adapter
3968 * @dev : class device object representation for the host
3969 * @attr : device attribute (unused)
3970 * @buf : buffer to send data to
3971 *
3972 * Display the handle used by the applications while executing management
3973 * tasks on the adapter. We invoke a management module API to get the adapter
3974 * handle, since we do not interface with applications directly.
3975 */
3976 static ssize_t
megaraid_mbox_app_hndl_show(struct device * dev,struct device_attribute * attr,char * buf)3977 megaraid_mbox_app_hndl_show(struct device *dev, struct device_attribute *attr, char *buf)
3978 {
3979 struct Scsi_Host *shost = class_to_shost(dev);
3980 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
3981 uint32_t app_hndl;
3982
3983 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
3984
3985 return sysfs_emit(buf, "%u\n", app_hndl);
3986 }
3987
3988
3989 /**
3990 * megaraid_mbox_ld_show - display the logical drive number for this device
3991 * @dev : device object representation for the scsi device
3992 * @attr : device attribute to show
3993 * @buf : buffer to send data to
3994 *
3995 * Display the logical drive number for the device in question, if it a valid
3996 * logical drive. For physical devices, "-1" is returned.
3997 *
3998 * The logical drive number is displayed in following format:
3999 *
4000 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4001 *
4002 * <int> <int> <int> <int>
4003 */
4004 static ssize_t
megaraid_mbox_ld_show(struct device * dev,struct device_attribute * attr,char * buf)4005 megaraid_mbox_ld_show(struct device *dev, struct device_attribute *attr, char *buf)
4006 {
4007 struct scsi_device *sdev = to_scsi_device(dev);
4008 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4009 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4010 int scsi_id = -1;
4011 int logical_drv = -1;
4012 int ldid_map = -1;
4013 uint32_t app_hndl = 0;
4014 int mapped_sdev_id;
4015 int rval;
4016 int i;
4017
4018 if (raid_dev->random_del_supported &&
4019 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4020
4021 rval = megaraid_sysfs_get_ldmap(adapter);
4022 if (rval == 0) {
4023
4024 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4025
4026 mapped_sdev_id = sdev->id;
4027
4028 if (sdev->id > adapter->init_id) {
4029 mapped_sdev_id -= 1;
4030 }
4031
4032 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4033
4034 scsi_id = sdev->id;
4035
4036 logical_drv = i;
4037
4038 ldid_map = raid_dev->curr_ldmap[i];
4039
4040 app_hndl = mraid_mm_adapter_app_handle(
4041 adapter->unique_id);
4042
4043 break;
4044 }
4045 }
4046 }
4047 else {
4048 con_log(CL_ANN, (KERN_NOTICE
4049 "megaraid: sysfs get ld map failed: %x\n",
4050 rval));
4051 }
4052 }
4053
4054 return sysfs_emit(buf, "%d %d %d %d\n", scsi_id, logical_drv,
4055 ldid_map, app_hndl);
4056 }
4057
4058
4059 /*
4060 * END: Mailbox Low Level Driver
4061 */
4062 module_init(megaraid_init);
4063 module_exit(megaraid_exit);
4064