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[SG] Update crypto/ to sg helpers
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / megaraid / megaraid_mbox.c
CommitLineData
1da177e4
LT		 1/*
2 *
3 * Linux MegaRAID device driver
4 *
5 * Copyright (c) 2003-2004 LSI Logic Corporation.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 *
12 * FILE : megaraid_mbox.c
cd96d96f 13 * Version : v2.20.5.1 (Nov 16 2006)
1da177e4
LT		 14 *
15 * Authors:
cd96d96f
SP		 16 * Atul Mukker <Atul.Mukker@lsi.com>
17 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com>
18 * Manoj Jose <Manoj.Jose@lsi.com>
19 * Seokmann Ju
1da177e4
LT		 20 *
21 * List of supported controllers
22 *
23 * OEM Product Name VID DID SSVID SSID
24 * --- ------------ --- --- ---- ----
25 * Dell PERC3/QC 101E 1960 1028 0471
26 * Dell PERC3/DC 101E 1960 1028 0493
27 * Dell PERC3/SC 101E 1960 1028 0475
28 * Dell PERC3/Di 1028 1960 1028 0123
29 * Dell PERC4/SC 1000 1960 1028 0520
30 * Dell PERC4/DC 1000 1960 1028 0518
31 * Dell PERC4/QC 1000 0407 1028 0531
32 * Dell PERC4/Di 1028 000F 1028 014A
33 * Dell PERC 4e/Si 1028 0013 1028 016c
34 * Dell PERC 4e/Di 1028 0013 1028 016d
35 * Dell PERC 4e/Di 1028 0013 1028 016e
36 * Dell PERC 4e/Di 1028 0013 1028 016f
37 * Dell PERC 4e/Di 1028 0013 1028 0170
38 * Dell PERC 4e/DC 1000 0408 1028 0002
39 * Dell PERC 4e/SC 1000 0408 1028 0001
40 *
41 *
42 * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520
43 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520
44 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518
45 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530
46 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532
47 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531
48 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001
49 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002
50 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523
51 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523
52 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004
53 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008
54 *
55 * INTEL RAID Controller SRCU42X 1000 0407 8086 0532
56 * INTEL RAID Controller SRCS16 1000 1960 8086 0523
57 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002
58 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530
59 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008
60 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431
61 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499
62 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520
63 *
64 * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065
65 *
66 * ACER MegaRAID ROMB-2E 1000 0408 1025 004D
67 *
68 * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287
69 *
70 * For history of changes, see Documentation/ChangeLog.megaraid
71 */
72
73#include "megaraid_mbox.h"
74
75static int megaraid_init(void);
76static void megaraid_exit(void);
77
78static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
79static void megaraid_detach_one(struct pci_dev *);
5457b6a6 80static void megaraid_mbox_shutdown(struct pci_dev *);
1da177e4
LT		 81
82static int megaraid_io_attach(adapter_t *);
83static void megaraid_io_detach(adapter_t *);
84
85static int megaraid_init_mbox(adapter_t *);
86static void megaraid_fini_mbox(adapter_t *);
87
88static int megaraid_alloc_cmd_packets(adapter_t *);
89static void megaraid_free_cmd_packets(adapter_t *);
90
91static int megaraid_mbox_setup_dma_pools(adapter_t *);
92static void megaraid_mbox_teardown_dma_pools(adapter_t *);
93
94static int megaraid_sysfs_alloc_resources(adapter_t *);
95static void megaraid_sysfs_free_resources(adapter_t *);
96
97static int megaraid_abort_handler(struct scsi_cmnd *);
98static int megaraid_reset_handler(struct scsi_cmnd *);
99
100static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
101static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
102static int megaraid_busywait_mbox(mraid_device_t *);
103static int megaraid_mbox_product_info(adapter_t *);
104static int megaraid_mbox_extended_cdb(adapter_t *);
105static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
106static int megaraid_mbox_support_random_del(adapter_t *);
107static int megaraid_mbox_get_max_sg(adapter_t *);
108static void megaraid_mbox_enum_raid_scsi(adapter_t *);
109static void megaraid_mbox_flush_cache(adapter_t *);
cd96d96f 110static int megaraid_mbox_fire_sync_cmd(adapter_t *);
1da177e4
LT		 111
112static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
113static void megaraid_mbox_setup_device_map(adapter_t *);
114
115static int megaraid_queue_command(struct scsi_cmnd *,
116 void (*)(struct scsi_cmnd *));
117static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
118static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
119static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
120 struct scsi_cmnd *);
121static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
122 struct scsi_cmnd *);
123
7d12e780 124static irqreturn_t megaraid_isr(int, void *);
1da177e4
LT		 125
126static void megaraid_mbox_dpc(unsigned long);
127
128static ssize_t megaraid_sysfs_show_app_hndl(struct class_device *, char *);
10523b3b 129static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *);
1da177e4
LT		 130
131static int megaraid_cmm_register(adapter_t *);
132static int megaraid_cmm_unregister(adapter_t *);
133static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
134static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
135static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
136static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
137static int wait_till_fw_empty(adapter_t *);
138
139
140
cd96d96f 141MODULE_AUTHOR("megaraidlinux@lsi.com");
1da177e4
LT		 142MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
143MODULE_LICENSE("GPL");
144MODULE_VERSION(MEGARAID_VERSION);
145
146/*
147 * ### modules parameters for driver ###
148 */
149
a69b74d3 150/*
1da177e4
LT		 151 * Set to enable driver to expose unconfigured disk to kernel
152 */
153static int megaraid_expose_unconf_disks = 0;
154module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
155MODULE_PARM_DESC(unconf_disks,
156 "Set to expose unconfigured disks to kernel (default=0)");
157
a69b74d3 158/*
1da177e4
LT		 159 * driver wait time if the adapter's mailbox is busy
160 */
161static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
162module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
163MODULE_PARM_DESC(busy_wait,
164 "Max wait for mailbox in microseconds if busy (default=10)");
165
a69b74d3 166/*
1da177e4
LT		 167 * number of sectors per IO command
168 */
169static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
170module_param_named(max_sectors, megaraid_max_sectors, int, 0);
171MODULE_PARM_DESC(max_sectors,
172 "Maximum number of sectors per IO command (default=128)");
173
a69b74d3 174/*
1da177e4
LT		 175 * number of commands per logical unit
176 */
177static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
178module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
179MODULE_PARM_DESC(cmd_per_lun,
180 "Maximum number of commands per logical unit (default=64)");
181
182
a69b74d3 183/*
1da177e4
LT		 184 * Fast driver load option, skip scanning for physical devices during load.
185 * This would result in non-disk devices being skipped during driver load
186 * time. These can be later added though, using /proc/scsi/scsi
187 */
188static unsigned int megaraid_fast_load = 0;
189module_param_named(fast_load, megaraid_fast_load, int, 0);
190MODULE_PARM_DESC(fast_load,
191 "Faster loading of the driver, skips physical devices! (default=0)");
192
193
a69b74d3 194/*
1da177e4
LT		 195 * mraid_debug level - threshold for amount of information to be displayed by
196 * the driver. This level can be changed through modules parameters, ioctl or
197 * sysfs/proc interface. By default, print the announcement messages only.
198 */
199int mraid_debug_level = CL_ANN;
200module_param_named(debug_level, mraid_debug_level, int, 0);
201MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
202
203/*
204 * ### global data ###
205 */
206static uint8_t megaraid_mbox_version[8] =
672b2d38 207 { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 };
1da177e4
LT		 208
209
210/*
211 * PCI table for all supported controllers.
212 */
213static struct pci_device_id pci_id_table_g[] = {
214 {
215 PCI_VENDOR_ID_DELL,
216 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
217 PCI_VENDOR_ID_DELL,
218 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
219 },
220 {
221 PCI_VENDOR_ID_LSI_LOGIC,
222 PCI_DEVICE_ID_PERC4_SC,
223 PCI_VENDOR_ID_DELL,
224 PCI_SUBSYS_ID_PERC4_SC,
225 },
226 {
227 PCI_VENDOR_ID_LSI_LOGIC,
228 PCI_DEVICE_ID_PERC4_DC,
229 PCI_VENDOR_ID_DELL,
230 PCI_SUBSYS_ID_PERC4_DC,
231 },
232 {
233 PCI_VENDOR_ID_LSI_LOGIC,
672b2d38
JS		 234 PCI_DEVICE_ID_VERDE,
235 PCI_ANY_ID,
236 PCI_ANY_ID,
1da177e4
LT		 237 },
238 {
239 PCI_VENDOR_ID_DELL,
240 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
241 PCI_VENDOR_ID_DELL,
242 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
243 },
244 {
245 PCI_VENDOR_ID_DELL,
246 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
247 PCI_VENDOR_ID_DELL,
248 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
249 },
250 {
251 PCI_VENDOR_ID_DELL,
252 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
253 PCI_VENDOR_ID_DELL,
254 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
255 },
256 {
257 PCI_VENDOR_ID_DELL,
258 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
259 PCI_VENDOR_ID_DELL,
260 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
261 },
262 {
263 PCI_VENDOR_ID_DELL,
264 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
265 PCI_VENDOR_ID_DELL,
266 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
267 },
268 {
269 PCI_VENDOR_ID_DELL,
270 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
271 PCI_VENDOR_ID_DELL,
272 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
273 },
274 {
275 PCI_VENDOR_ID_LSI_LOGIC,
672b2d38
JS		 276 PCI_DEVICE_ID_DOBSON,
277 PCI_ANY_ID,
278 PCI_ANY_ID,
1da177e4
LT		 279 },
280 {
281 PCI_VENDOR_ID_AMI,
282 PCI_DEVICE_ID_AMI_MEGARAID3,
ed7e8ef7
JS		 283 PCI_ANY_ID,
284 PCI_ANY_ID,
1da177e4
LT		 285 },
286 {
287 PCI_VENDOR_ID_LSI_LOGIC,
ed7e8ef7
JS		 288 PCI_DEVICE_ID_AMI_MEGARAID3,
289 PCI_ANY_ID,
290 PCI_ANY_ID,
1da177e4
LT		 291 },
292 {
293 PCI_VENDOR_ID_LSI_LOGIC,
672b2d38
JS		 294 PCI_DEVICE_ID_LINDSAY,
295 PCI_ANY_ID,
296 PCI_ANY_ID,
1da177e4 297 },
1da177e4
LT		 298 {0} /* Terminating entry */
299};
300MODULE_DEVICE_TABLE(pci, pci_id_table_g);
301
302
303static struct pci_driver megaraid_pci_driver_g = {
304 .name = "megaraid",
305 .id_table = pci_id_table_g,
306 .probe = megaraid_probe_one,
307 .remove = __devexit_p(megaraid_detach_one),
5457b6a6 308 .shutdown = megaraid_mbox_shutdown,
1da177e4
LT		 309};
310
311
312
313// definitions for the device attributes for exporting logical drive number
314// for a scsi address (Host, Channel, Id, Lun)
315
316CLASS_DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
317 NULL);
318
319// Host template initializer for megaraid mbox sysfs device attributes
320static struct class_device_attribute *megaraid_shost_attrs[] = {
321 &class_device_attr_megaraid_mbox_app_hndl,
322 NULL,
323};
324
325
326DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
327
328// Host template initializer for megaraid mbox sysfs device attributes
329static struct device_attribute *megaraid_sdev_attrs[] = {
330 &dev_attr_megaraid_mbox_ld,
331 NULL,
332};
333
f4c8aa11 334/**
335 * megaraid_change_queue_depth - Change the device's queue depth
336 * @sdev: scsi device struct
337 * @qdepth: depth to set
338 *
339 * Return value:
340 * actual depth set
a69b74d3 341 */
f4c8aa11 342static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth)
343{
344 if (qdepth > MBOX_MAX_SCSI_CMDS)
345 qdepth = MBOX_MAX_SCSI_CMDS;
346 scsi_adjust_queue_depth(sdev, 0, qdepth);
347 return sdev->queue_depth;
348}
1da177e4
LT		 349
350/*
351 * Scsi host template for megaraid unified driver
352 */
353static struct scsi_host_template megaraid_template_g = {
354 .module = THIS_MODULE,
355 .name = "LSI Logic MegaRAID driver",
356 .proc_name = "megaraid",
357 .queuecommand = megaraid_queue_command,
358 .eh_abort_handler = megaraid_abort_handler,
359 .eh_device_reset_handler = megaraid_reset_handler,
360 .eh_bus_reset_handler = megaraid_reset_handler,
361 .eh_host_reset_handler = megaraid_reset_handler,
f4c8aa11 362 .change_queue_depth = megaraid_change_queue_depth,
1da177e4 363 .use_clustering = ENABLE_CLUSTERING,
9cb83c75 364 .use_sg_chaining = ENABLE_SG_CHAINING,
1da177e4
LT		 365 .sdev_attrs = megaraid_sdev_attrs,
366 .shost_attrs = megaraid_shost_attrs,
367};
368
369
370/**
371 * megaraid_init - module load hook
372 *
373 * We register ourselves as hotplug enabled module and let PCI subsystem
a69b74d3
RD		 374 * discover our adapters.
375 */
1da177e4
LT		 376static int __init
377megaraid_init(void)
378{
379 int rval;
380
381 // Announce the driver version
382 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
383 MEGARAID_EXT_VERSION));
384
385 // check validity of module parameters
386 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
387
388 con_log(CL_ANN, (KERN_WARNING
389 "megaraid mailbox: max commands per lun reset to %d\n",
390 MBOX_MAX_SCSI_CMDS));
391
392 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
393 }
394
395
396 // register as a PCI hot-plug driver module
672b2d38
JS		 397 rval = pci_register_driver(&megaraid_pci_driver_g);
398 if (rval < 0) {
1da177e4
LT		 399 con_log(CL_ANN, (KERN_WARNING
400 "megaraid: could not register hotplug support.\n"));
401 }
402
403 return rval;
404}
405
406
407/**
408 * megaraid_exit - driver unload entry point
409 *
a69b74d3 410 * We simply unwrap the megaraid_init routine here.
1da177e4
LT		 411 */
412static void __exit
413megaraid_exit(void)
414{
415 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
416
417 // unregister as PCI hotplug driver
418 pci_unregister_driver(&megaraid_pci_driver_g);
419
420 return;
421}
422
423
424/**
425 * megaraid_probe_one - PCI hotplug entry point
a69b74d3
RD		 426 * @pdev : handle to this controller's PCI configuration space
427 * @id : pci device id of the class of controllers
1da177e4
LT		 428 *
429 * This routine should be called whenever a new adapter is detected by the
3a4fa0a2 430 * PCI hotplug susbsystem.
a69b74d3 431 */
1da177e4
LT		 432static int __devinit
433megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
434{
435 adapter_t *adapter;
436
437
438 // detected a new controller
439 con_log(CL_ANN, (KERN_INFO
440 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
441 pdev->vendor, pdev->device, pdev->subsystem_vendor,
442 pdev->subsystem_device));
443
444 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
445 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
446
447 if (pci_enable_device(pdev)) {
448 con_log(CL_ANN, (KERN_WARNING
449 "megaraid: pci_enable_device failed\n"));
450
451 return -ENODEV;
452 }
453
454 // Enable bus-mastering on this controller
455 pci_set_master(pdev);
456
457 // Allocate the per driver initialization structure
dd00cc48 458 adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL);
1da177e4
LT		 459
460 if (adapter == NULL) {
461 con_log(CL_ANN, (KERN_WARNING
462 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__));
463
464 goto out_probe_one;
465 }
1da177e4
LT		 466
467
468 // set up PCI related soft state and other pre-known parameters
469 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn;
470 adapter->irq = pdev->irq;
471 adapter->pdev = pdev;
472
473 atomic_set(&adapter->being_detached, 0);
474
475 // Setup the default DMA mask. This would be changed later on
476 // depending on hardware capabilities
672b2d38 477 if (pci_set_dma_mask(adapter->pdev, DMA_32BIT_MASK) != 0) {
1da177e4
LT		 478
479 con_log(CL_ANN, (KERN_WARNING
480 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
481
482 goto out_free_adapter;
483 }
484
485
486 // Initialize the synchronization lock for kernel and LLD
487 spin_lock_init(&adapter->lock);
1da177e4
LT		 488
489 // Initialize the command queues: the list of free SCBs and the list
490 // of pending SCBs.
491 INIT_LIST_HEAD(&adapter->kscb_pool);
492 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
493
494 INIT_LIST_HEAD(&adapter->pend_list);
495 spin_lock_init(PENDING_LIST_LOCK(adapter));
496
497 INIT_LIST_HEAD(&adapter->completed_list);
498 spin_lock_init(COMPLETED_LIST_LOCK(adapter));
499
500
501 // Start the mailbox based controller
502 if (megaraid_init_mbox(adapter) != 0) {
503 con_log(CL_ANN, (KERN_WARNING
504 "megaraid: maibox adapter did not initialize\n"));
505
506 goto out_free_adapter;
507 }
508
509 // Register with LSI Common Management Module
510 if (megaraid_cmm_register(adapter) != 0) {
511
512 con_log(CL_ANN, (KERN_WARNING
513 "megaraid: could not register with management module\n"));
514
515 goto out_fini_mbox;
516 }
517
518 // setup adapter handle in PCI soft state
519 pci_set_drvdata(pdev, adapter);
520
521 // attach with scsi mid-layer
522 if (megaraid_io_attach(adapter) != 0) {
523
524 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
525
526 goto out_cmm_unreg;
527 }
528
529 return 0;
530
531out_cmm_unreg:
532 pci_set_drvdata(pdev, NULL);
533 megaraid_cmm_unregister(adapter);
534out_fini_mbox:
535 megaraid_fini_mbox(adapter);
536out_free_adapter:
537 kfree(adapter);
538out_probe_one:
539 pci_disable_device(pdev);
540
541 return -ENODEV;
542}
543
544
545/**
a69b74d3
RD		 546 * megaraid_detach_one - release framework resources and call LLD release routine
547 * @pdev : handle for our PCI cofiguration space
1da177e4
LT		 548 *
549 * This routine is called during driver unload. We free all the allocated
550 * resources and call the corresponding LLD so that it can also release all
551 * its resources.
552 *
a69b74d3
RD		 553 * This routine is also called from the PCI hotplug system.
554 */
1da177e4
LT		 555static void
556megaraid_detach_one(struct pci_dev *pdev)
557{
558 adapter_t *adapter;
559 struct Scsi_Host *host;
560
561
562 // Start a rollback on this adapter
563 adapter = pci_get_drvdata(pdev);
564
565 if (!adapter) {
566 con_log(CL_ANN, (KERN_CRIT
567 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
568 pdev->vendor, pdev->device, pdev->subsystem_vendor,
569 pdev->subsystem_device));
570
571 return;
572 }
573 else {
574 con_log(CL_ANN, (KERN_NOTICE
575 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
576 pdev->vendor, pdev->device, pdev->subsystem_vendor,
577 pdev->subsystem_device));
578 }
579
580
581 host = adapter->host;
582
583 // do not allow any more requests from the management module for this
584 // adapter.
585 // FIXME: How do we account for the request which might still be
586 // pending with us?
587 atomic_set(&adapter->being_detached, 1);
588
589 // detach from the IO sub-system
590 megaraid_io_detach(adapter);
591
592 // reset the device state in the PCI structure. We check this
593 // condition when we enter here. If the device state is NULL,
594 // that would mean the device has already been removed
595 pci_set_drvdata(pdev, NULL);
596
597 // Unregister from common management module
598 //
599 // FIXME: this must return success or failure for conditions if there
600 // is a command pending with LLD or not.
601 megaraid_cmm_unregister(adapter);
602
603 // finalize the mailbox based controller and release all resources
604 megaraid_fini_mbox(adapter);
605
606 kfree(adapter);
607
608 scsi_host_put(host);
609
610 pci_disable_device(pdev);
611
612 return;
613}
614
615
616/**
617 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
a69b74d3 618 * @pdev : generic driver model device
1da177e4 619 *
a69b74d3 620 * Shutdown notification, perform flush cache.
1da177e4
LT		 621 */
622static void
5457b6a6 623megaraid_mbox_shutdown(struct pci_dev *pdev)
1da177e4 624{
5457b6a6 625 adapter_t *adapter = pci_get_drvdata(pdev);
1da177e4
LT		 626 static int counter;
627
628 if (!adapter) {
629 con_log(CL_ANN, (KERN_WARNING
630 "megaraid: null device in shutdown\n"));
631 return;
632 }
633
634 // flush caches now
635 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
636 counter++));
637
638 megaraid_mbox_flush_cache(adapter);
639
640 con_log(CL_ANN, ("done\n"));
641}
642
643
644/**
645 * megaraid_io_attach - attach a device with the IO subsystem
a69b74d3 646 * @adapter : controller's soft state
1da177e4 647 *
a69b74d3
RD		 648 * Attach this device with the IO subsystem.
649 */
1da177e4
LT		 650static int
651megaraid_io_attach(adapter_t *adapter)
652{
653 struct Scsi_Host *host;
654
655 // Initialize SCSI Host structure
656 host = scsi_host_alloc(&megaraid_template_g, 8);
657 if (!host) {
658 con_log(CL_ANN, (KERN_WARNING
659 "megaraid mbox: scsi_register failed\n"));
660
661 return -1;
662 }
663
664 SCSIHOST2ADAP(host) = (caddr_t)adapter;
665 adapter->host = host;
666
1da177e4
LT		 667 host->irq = adapter->irq;
668 host->unique_id = adapter->unique_id;
669 host->can_queue = adapter->max_cmds;
670 host->this_id = adapter->init_id;
671 host->sg_tablesize = adapter->sglen;
672 host->max_sectors = adapter->max_sectors;
673 host->cmd_per_lun = adapter->cmd_per_lun;
674 host->max_channel = adapter->max_channel;
675 host->max_id = adapter->max_target;
676 host->max_lun = adapter->max_lun;
677
678
679 // notify mid-layer about the new controller
680 if (scsi_add_host(host, &adapter->pdev->dev)) {
681
682 con_log(CL_ANN, (KERN_WARNING
683 "megaraid mbox: scsi_add_host failed\n"));
684
685 scsi_host_put(host);
686
687 return -1;
688 }
689
690 scsi_scan_host(host);
691
692 return 0;
693}
694
695
696/**
697 * megaraid_io_detach - detach a device from the IO subsystem
a69b74d3 698 * @adapter : controller's soft state
1da177e4 699 *
a69b74d3
RD		 700 * Detach this device from the IO subsystem.
701 */
1da177e4
LT		 702static void
703megaraid_io_detach(adapter_t *adapter)
704{
705 struct Scsi_Host *host;
706
707 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
708
709 host = adapter->host;
710
711 scsi_remove_host(host);
712
713 return;
714}
715
716
717/*
718 * START: Mailbox Low Level Driver
719 *
720 * This is section specific to the single mailbox based controllers
721 */
722
723/**
724 * megaraid_init_mbox - initialize controller
a69b74d3 725 * @adapter : our soft state
1da177e4 726 *
a69b74d3
RD		 727 * - Allocate 16-byte aligned mailbox memory for firmware handshake
728 * - Allocate controller's memory resources
729 * - Find out all initialization data
730 * - Allocate memory required for all the commands
731 * - Use internal library of FW routines, build up complete soft state
1da177e4 732 */
cedfb178 733static int __devinit
1da177e4
LT		 734megaraid_init_mbox(adapter_t *adapter)
735{
736 struct pci_dev *pdev;
737 mraid_device_t *raid_dev;
738 int i;
fbf60802 739 uint32_t magic64;
1da177e4
LT		 740
741
742 adapter->ito = MBOX_TIMEOUT;
743 pdev = adapter->pdev;
744
745 /*
746 * Allocate and initialize the init data structure for mailbox
747 * controllers
748 */
dd00cc48 749 raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL);
1da177e4
LT		 750 if (raid_dev == NULL) return -1;
751
1da177e4
LT		 752
753 /*
754 * Attach the adapter soft state to raid device soft state
755 */
756 adapter->raid_device = (caddr_t)raid_dev;
757 raid_dev->fast_load = megaraid_fast_load;
758
759
760 // our baseport
761 raid_dev->baseport = pci_resource_start(pdev, 0);
762
763 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
764
765 con_log(CL_ANN, (KERN_WARNING
766 "megaraid: mem region busy\n"));
767
768 goto out_free_raid_dev;
769 }
770
771 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
772
773 if (!raid_dev->baseaddr) {
774
775 con_log(CL_ANN, (KERN_WARNING
776 "megaraid: could not map hba memory\n") );
777
778 goto out_release_regions;
779 }
780
cd96d96f
SP		 781 /* initialize the mutual exclusion lock for the mailbox */
782 spin_lock_init(&raid_dev->mailbox_lock);
783
784 /* allocate memory required for commands */
785 if (megaraid_alloc_cmd_packets(adapter) != 0)
786 goto out_iounmap;
1da177e4 787
cd96d96f
SP		 788 /*
789 * Issue SYNC cmd to flush the pending cmds in the adapter
790 * and initialize its internal state
791 */
792
793 if (megaraid_mbox_fire_sync_cmd(adapter))
794 con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
795
796 /*
797 * Setup the rest of the soft state using the library of
798 * FW routines
799 */
800
801 /* request IRQ and register the interrupt service routine */
1d6f359a 802 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
1da177e4
LT		 803 adapter)) {
804
805 con_log(CL_ANN, (KERN_WARNING
806 "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
cd96d96f 807 goto out_alloc_cmds;
1da177e4 808
1da177e4
LT		 809 }
810
811 // Product info
cd96d96f
SP		 812 if (megaraid_mbox_product_info(adapter) != 0)
813 goto out_free_irq;
1da177e4
LT		 814
815 // Do we support extended CDBs
816 adapter->max_cdb_sz = 10;
817 if (megaraid_mbox_extended_cdb(adapter) == 0) {
818 adapter->max_cdb_sz = 16;
819 }
820
821 /*
822 * Do we support cluster environment, if we do, what is the initiator
823 * id.
824 * NOTE: In a non-cluster aware firmware environment, the LLD should
825 * return 7 as initiator id.
826 */
827 adapter->ha = 0;
828 adapter->init_id = -1;
829 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
830 adapter->ha = 1;
831 }
832
833 /*
834 * Prepare the device ids array to have the mapping between the kernel
835 * device address and megaraid device address.
836 * We export the physical devices on their actual addresses. The
837 * logical drives are exported on a virtual SCSI channel
838 */
839 megaraid_mbox_setup_device_map(adapter);
840
841 // If the firmware supports random deletion, update the device id map
842 if (megaraid_mbox_support_random_del(adapter)) {
843
844 // Change the logical drives numbers in device_ids array one
845 // slot in device_ids is reserved for target id, that's why
846 // "<=" below
847 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
848 adapter->device_ids[adapter->max_channel][i] += 0x80;
849 }
850 adapter->device_ids[adapter->max_channel][adapter->init_id] =
851 0xFF;
852
853 raid_dev->random_del_supported = 1;
854 }
855
856 /*
857 * find out the maximum number of scatter-gather elements supported by
858 * this firmware
859 */
860 adapter->sglen = megaraid_mbox_get_max_sg(adapter);
861
862 // enumerate RAID and SCSI channels so that all devices on SCSI
863 // channels can later be exported, including disk devices
864 megaraid_mbox_enum_raid_scsi(adapter);
865
866 /*
867 * Other parameters required by upper layer
868 *
869 * maximum number of sectors per IO command
870 */
871 adapter->max_sectors = megaraid_max_sectors;
872
873 /*
874 * number of queued commands per LUN.
875 */
876 adapter->cmd_per_lun = megaraid_cmd_per_lun;
877
878 /*
879 * Allocate resources required to issue FW calls, when sysfs is
880 * accessed
881 */
cd96d96f
SP		 882 if (megaraid_sysfs_alloc_resources(adapter) != 0)
883 goto out_free_irq;
1da177e4
LT		 884
885 // Set the DMA mask to 64-bit. All supported controllers as capable of
886 // DMA in this range
fbf60802
JS		 887 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
888
889 if (((magic64 == HBA_SIGNATURE_64_BIT) &&
890 ((adapter->pdev->subsystem_device !=
8741ca71 891 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
fbf60802
JS		 892 (adapter->pdev->subsystem_device !=
893 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
894 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
895 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
896 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
897 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
898 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
899 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
900 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
901 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
902 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
903 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
904 if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK)) {
905 con_log(CL_ANN, (KERN_WARNING
906 "megaraid: DMA mask for 64-bit failed\n"));
907
908 if (pci_set_dma_mask (adapter->pdev, DMA_32BIT_MASK)) {
909 con_log(CL_ANN, (KERN_WARNING
910 "megaraid: 32-bit DMA mask failed\n"));
911 goto out_free_sysfs_res;
912 }
913 }
1da177e4
LT		 914 }
915
916 // setup tasklet for DPC
917 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
918 (unsigned long)adapter);
919
920 con_log(CL_DLEVEL1, (KERN_INFO
921 "megaraid mbox hba successfully initialized\n"));
922
923 return 0;
924
925out_free_sysfs_res:
926 megaraid_sysfs_free_resources(adapter);
1da177e4
LT		 927out_free_irq:
928 free_irq(adapter->irq, adapter);
cd96d96f
SP		 929out_alloc_cmds:
930 megaraid_free_cmd_packets(adapter);
1da177e4
LT		 931out_iounmap:
932 iounmap(raid_dev->baseaddr);
933out_release_regions:
934 pci_release_regions(pdev);
935out_free_raid_dev:
936 kfree(raid_dev);
937
938 return -1;
939}
940
941
942/**
943 * megaraid_fini_mbox - undo controller initialization
a69b74d3 944 * @adapter : our soft state
1da177e4
LT		 945 */
946static void
947megaraid_fini_mbox(adapter_t *adapter)
948{
949 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
950
951 // flush all caches
952 megaraid_mbox_flush_cache(adapter);
953
954 tasklet_kill(&adapter->dpc_h);
955
956 megaraid_sysfs_free_resources(adapter);
957
958 megaraid_free_cmd_packets(adapter);
959
960 free_irq(adapter->irq, adapter);
961
962 iounmap(raid_dev->baseaddr);
963
964 pci_release_regions(adapter->pdev);
965
966 kfree(raid_dev);
967
968 return;
969}
970
971
972/**
973 * megaraid_alloc_cmd_packets - allocate shared mailbox
a69b74d3 974 * @adapter : soft state of the raid controller
1da177e4
LT		 975 *
976 * Allocate and align the shared mailbox. This maibox is used to issue
977 * all the commands. For IO based controllers, the mailbox is also regsitered
978 * with the FW. Allocate memory for all commands as well.
a69b74d3 979 * This is our big allocator.
1da177e4
LT		 980 */
981static int
982megaraid_alloc_cmd_packets(adapter_t *adapter)
983{
984 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
985 struct pci_dev *pdev;
986 unsigned long align;
987 scb_t *scb;
988 mbox_ccb_t *ccb;
989 struct mraid_pci_blk *epthru_pci_blk;
990 struct mraid_pci_blk *sg_pci_blk;
991 struct mraid_pci_blk *mbox_pci_blk;
992 int i;
993
994 pdev = adapter->pdev;
995
996 /*
997 * Setup the mailbox
998 * Allocate the common 16-byte aligned memory for the handshake
999 * mailbox.
1000 */
1001 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
1002 sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
1003
1004 if (!raid_dev->una_mbox64) {
1005 con_log(CL_ANN, (KERN_WARNING
1006 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1007 __LINE__));
1008 return -1;
1009 }
1010 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
1011
1012 /*
1013 * Align the mailbox at 16-byte boundary
1014 */
1015 raid_dev->mbox = &raid_dev->una_mbox64->mbox32;
1016
1017 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
1018 (~0UL ^ 0xFUL));
1019
1020 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
1021
1022 align = ((void *)raid_dev->mbox -
1023 ((void *)&raid_dev->una_mbox64->mbox32));
1024
1025 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1026 align;
1027
1028 // Allocate memory for commands issued internally
1029 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
1030 &adapter->ibuf_dma_h);
1031 if (!adapter->ibuf) {
1032
1033 con_log(CL_ANN, (KERN_WARNING
1034 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1035 __LINE__));
1036
1037 goto out_free_common_mbox;
1038 }
1039 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
1040
1041 // Allocate memory for our SCSI Command Blocks and their associated
1042 // memory
1043
1044 /*
1045 * Allocate memory for the base list of scb. Later allocate memory for
1046 * CCBs and embedded components of each CCB and point the pointers in
1047 * scb to the allocated components
1048 * NOTE: The code to allocate SCB will be duplicated in all the LLD
1049 * since the calling routine does not yet know the number of available
1050 * commands.
1051 */
dd00cc48 1052 adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL);
1da177e4
LT		 1053
1054 if (adapter->kscb_list == NULL) {
1055 con_log(CL_ANN, (KERN_WARNING
1056 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1057 __LINE__));
1058 goto out_free_ibuf;
1059 }
1da177e4
LT		 1060
1061 // memory allocation for our command packets
1062 if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1063 con_log(CL_ANN, (KERN_WARNING
1064 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1065 __LINE__));
1066 goto out_free_scb_list;
1067 }
1068
1069 // Adjust the scb pointers and link in the free pool
1070 epthru_pci_blk = raid_dev->epthru_pool;
1071 sg_pci_blk = raid_dev->sg_pool;
1072 mbox_pci_blk = raid_dev->mbox_pool;
1073
1074 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1075 scb = adapter->kscb_list + i;
1076 ccb = raid_dev->ccb_list + i;
1077
1078 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1079 ccb->raw_mbox = (uint8_t *)ccb->mbox;
1080 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1081 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1082
1083 // make sure the mailbox is aligned properly
1084 if (ccb->mbox_dma_h & 0x0F) {
1085 con_log(CL_ANN, (KERN_CRIT
1086 "megaraid mbox: not aligned on 16-bytes\n"));
1087
1088 goto out_teardown_dma_pools;
1089 }
1090
1091 ccb->epthru = (mraid_epassthru_t *)
1092 epthru_pci_blk[i].vaddr;
1093 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr;
1094 ccb->pthru = (mraid_passthru_t *)ccb->epthru;
1095 ccb->pthru_dma_h = ccb->epthru_dma_h;
1096
1097
1098 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1099 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr;
1100 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64;
1101
1102 scb->ccb = (caddr_t)ccb;
1103 scb->gp = 0;
1104
1105 scb->sno = i; // command index
1106
1107 scb->scp = NULL;
1108 scb->state = SCB_FREE;
1109 scb->dma_direction = PCI_DMA_NONE;
1110 scb->dma_type = MRAID_DMA_NONE;
1111 scb->dev_channel = -1;
1112 scb->dev_target = -1;
1113
1114 // put scb in the free pool
1115 list_add_tail(&scb->list, &adapter->kscb_pool);
1116 }
1117
1118 return 0;
1119
1120out_teardown_dma_pools:
1121 megaraid_mbox_teardown_dma_pools(adapter);
1122out_free_scb_list:
1123 kfree(adapter->kscb_list);
1124out_free_ibuf:
1125 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1126 adapter->ibuf_dma_h);
1127out_free_common_mbox:
1128 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1129 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1130
1131 return -1;
1132}
1133
1134
1135/**
1136 * megaraid_free_cmd_packets - free memory
a69b74d3 1137 * @adapter : soft state of the raid controller
1da177e4 1138 *
a69b74d3 1139 * Release memory resources allocated for commands.
1da177e4
LT		 1140 */
1141static void
1142megaraid_free_cmd_packets(adapter_t *adapter)
1143{
1144 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1145
1146 megaraid_mbox_teardown_dma_pools(adapter);
1147
1148 kfree(adapter->kscb_list);
1149
1150 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1151 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1152
1153 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1154 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1155 return;
1156}
1157
1158
1159/**
1160 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
a69b74d3 1161 * @adapter : HBA soft state
1da177e4 1162 *
a69b74d3
RD		 1163 * Setup the dma pools for mailbox, passthru and extended passthru structures,
1164 * and scatter-gather lists.
1da177e4
LT		 1165 */
1166static int
1167megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1168{
1169 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1170 struct mraid_pci_blk *epthru_pci_blk;
1171 struct mraid_pci_blk *sg_pci_blk;
1172 struct mraid_pci_blk *mbox_pci_blk;
1173 int i;
1174
1175
1176
1177 // Allocate memory for 16-bytes aligned mailboxes
1178 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1179 adapter->pdev,
1180 sizeof(mbox64_t) + 16,
1181 16, 0);
1182
1183 if (raid_dev->mbox_pool_handle == NULL) {
1184 goto fail_setup_dma_pool;
1185 }
1186
1187 mbox_pci_blk = raid_dev->mbox_pool;
1188 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1189 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1190 raid_dev->mbox_pool_handle,
1191 GFP_KERNEL,
1192 &mbox_pci_blk[i].dma_addr);
1193 if (!mbox_pci_blk[i].vaddr) {
1194 goto fail_setup_dma_pool;
1195 }
1196 }
1197
1198 /*
1199 * Allocate memory for each embedded passthru strucuture pointer
1200 * Request for a 128 bytes aligned structure for each passthru command
1201 * structure
1202 * Since passthru and extended passthru commands are exclusive, they
1203 * share common memory pool. Passthru structures piggyback on memory
1204 * allocted to extended passthru since passthru is smaller of the two
1205 */
1206 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1207 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1208
1209 if (raid_dev->epthru_pool_handle == NULL) {
1210 goto fail_setup_dma_pool;
1211 }
1212
1213 epthru_pci_blk = raid_dev->epthru_pool;
1214 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1215 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1216 raid_dev->epthru_pool_handle,
1217 GFP_KERNEL,
1218 &epthru_pci_blk[i].dma_addr);
1219 if (!epthru_pci_blk[i].vaddr) {
1220 goto fail_setup_dma_pool;
1221 }
1222 }
1223
1224
1225 // Allocate memory for each scatter-gather list. Request for 512 bytes
1226 // alignment for each sg list
1227 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1228 adapter->pdev,
1229 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1230 512, 0);
1231
1232 if (raid_dev->sg_pool_handle == NULL) {
1233 goto fail_setup_dma_pool;
1234 }
1235
1236 sg_pci_blk = raid_dev->sg_pool;
1237 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1238 sg_pci_blk[i].vaddr = pci_pool_alloc(
1239 raid_dev->sg_pool_handle,
1240 GFP_KERNEL,
1241 &sg_pci_blk[i].dma_addr);
1242 if (!sg_pci_blk[i].vaddr) {
1243 goto fail_setup_dma_pool;
1244 }
1245 }
1246
1247 return 0;
1248
1249fail_setup_dma_pool:
1250 megaraid_mbox_teardown_dma_pools(adapter);
1251 return -1;
1252}
1253
1254
1255/**
1256 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
a69b74d3 1257 * @adapter : HBA soft state
1da177e4 1258 *
a69b74d3
RD		 1259 * Teardown the dma pool for mailbox, passthru and extended passthru
1260 * structures, and scatter-gather lists.
1da177e4
LT		 1261 */
1262static void
1263megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1264{
1265 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1266 struct mraid_pci_blk *epthru_pci_blk;
1267 struct mraid_pci_blk *sg_pci_blk;
1268 struct mraid_pci_blk *mbox_pci_blk;
1269 int i;
1270
1271
1272 sg_pci_blk = raid_dev->sg_pool;
1273 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1274 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1275 sg_pci_blk[i].dma_addr);
1276 }
1277 if (raid_dev->sg_pool_handle)
1278 pci_pool_destroy(raid_dev->sg_pool_handle);
1279
1280
1281 epthru_pci_blk = raid_dev->epthru_pool;
1282 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1283 pci_pool_free(raid_dev->epthru_pool_handle,
1284 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1285 }
1286 if (raid_dev->epthru_pool_handle)
1287 pci_pool_destroy(raid_dev->epthru_pool_handle);
1288
1289
1290 mbox_pci_blk = raid_dev->mbox_pool;
1291 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1292 pci_pool_free(raid_dev->mbox_pool_handle,
1293 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1294 }
1295 if (raid_dev->mbox_pool_handle)
1296 pci_pool_destroy(raid_dev->mbox_pool_handle);
1297
1298 return;
1299}
1300
1301
1302/**
1303 * megaraid_alloc_scb - detach and return a scb from the free list
1304 * @adapter : controller's soft state
a69b74d3 1305 * @scp : pointer to the scsi command to be executed
1da177e4 1306 *
a69b74d3
RD		 1307 * Return the scb from the head of the free list. %NULL if there are none
1308 * available.
1309 */
858119e1 1310static scb_t *
1da177e4
LT		 1311megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1312{
1313 struct list_head *head = &adapter->kscb_pool;
1314 scb_t *scb = NULL;
1315 unsigned long flags;
1316
1317 // detach scb from free pool
1318 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1319
1320 if (list_empty(head)) {
1321 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1322 return NULL;
1323 }
1324
1325 scb = list_entry(head->next, scb_t, list);
1326 list_del_init(&scb->list);
1327
1328 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1329
1330 scb->state = SCB_ACTIVE;
1331 scb->scp = scp;
1332 scb->dma_type = MRAID_DMA_NONE;
1333
1334 return scb;
1335}
1336
1337
1338/**
1339 * megaraid_dealloc_scb - return the scb to the free pool
1340 * @adapter : controller's soft state
1341 * @scb : scb to be freed
1342 *
a69b74d3 1343 * Return the scb back to the free list of scbs. The caller must 'flush' the
1da177e4
LT		 1344 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1345 * NOTE NOTE: Make sure the scb is not on any list before calling this
1346 * routine.
a69b74d3 1347 */
1da177e4
LT		 1348static inline void
1349megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1350{
1351 unsigned long flags;
1352
1353 // put scb in the free pool
1354 scb->state = SCB_FREE;
1355 scb->scp = NULL;
1356 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1357
1358 list_add(&scb->list, &adapter->kscb_pool);
1359
1360 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1361
1362 return;
1363}
1364
1365
1366/**
1367 * megaraid_mbox_mksgl - make the scatter-gather list
a69b74d3
RD		 1368 * @adapter : controller's soft state
1369 * @scb : scsi control block
1da177e4 1370 *
a69b74d3 1371 * Prepare the scatter-gather list.
1da177e4 1372 */
858119e1 1373static int
1da177e4
LT		 1374megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1375{
1376 struct scatterlist *sgl;
1377 mbox_ccb_t *ccb;
1da177e4
LT		 1378 struct scsi_cmnd *scp;
1379 int sgcnt;
1380 int i;
1381
1382
1383 scp = scb->scp;
1384 ccb = (mbox_ccb_t *)scb->ccb;
1385
32fbac22
FT		 1386 sgcnt = scsi_dma_map(scp);
1387 BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen);
1388
1da177e4 1389 // no mapping required if no data to be transferred
32fbac22 1390 if (!sgcnt)
1da177e4
LT		 1391 return 0;
1392
1da177e4
LT		 1393 scb->dma_type = MRAID_DMA_WSG;
1394
32fbac22 1395 scsi_for_each_sg(scp, sgl, sgcnt, i) {
1da177e4
LT		 1396 ccb->sgl64[i].address = sg_dma_address(sgl);
1397 ccb->sgl64[i].length = sg_dma_len(sgl);
1398 }
1399
1400 // Return count of SG nodes
1401 return sgcnt;
1402}
1403
1404
1405/**
1406 * mbox_post_cmd - issue a mailbox command
a69b74d3
RD		 1407 * @adapter : controller's soft state
1408 * @scb : command to be issued
1da177e4 1409 *
a69b74d3 1410 * Post the command to the controller if mailbox is available.
1da177e4 1411 */
858119e1 1412static int
1da177e4
LT		 1413mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1414{
1415 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1416 mbox64_t *mbox64;
1417 mbox_t *mbox;
1418 mbox_ccb_t *ccb;
1419 unsigned long flags;
1420 unsigned int i = 0;
1421
1422
1423 ccb = (mbox_ccb_t *)scb->ccb;
1424 mbox = raid_dev->mbox;
1425 mbox64 = raid_dev->mbox64;
1426
1427 /*
1428 * Check for busy mailbox. If it is, return failure - the caller
1429 * should retry later.
1430 */
1431 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1432
1433 if (unlikely(mbox->busy)) {
1434 do {
1435 udelay(1);
1436 i++;
1437 rmb();
1438 } while(mbox->busy && (i < max_mbox_busy_wait));
1439
1440 if (mbox->busy) {
1441
1442 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1443
1444 return -1;
1445 }
1446 }
1447
1448
1449 // Copy this command's mailbox data into "adapter's" mailbox
1450 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1451 mbox->cmdid = scb->sno;
1452
1453 adapter->outstanding_cmds++;
1454
32fbac22
FT		 1455 if (scb->dma_direction == PCI_DMA_TODEVICE)
1456 pci_dma_sync_sg_for_device(adapter->pdev,
1457 scsi_sglist(scb->scp),
1458 scsi_sg_count(scb->scp),
1459 PCI_DMA_TODEVICE);
1da177e4
LT		 1460
1461 mbox->busy = 1; // Set busy
1462 mbox->poll = 0;
1463 mbox->ack = 0;
1464 wmb();
1465
1466 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1467
1468 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1469
1470 return 0;
1471}
1472
1473
1474/**
1475 * megaraid_queue_command - generic queue entry point for all LLDs
1476 * @scp : pointer to the scsi command to be executed
1477 * @done : callback routine to be called after the cmd has be completed
1478 *
1479 * Queue entry point for mailbox based controllers.
1480 */
1481static int
a69b74d3 1482megaraid_queue_command(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *))
1da177e4
LT		 1483{
1484 adapter_t *adapter;
1485 scb_t *scb;
1486 int if_busy;
1487
1488 adapter = SCP2ADAPTER(scp);
1489 scp->scsi_done = done;
1490 scp->result = 0;
1491
1da177e4
LT		 1492 /*
1493 * Allocate and build a SCB request
1494 * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1495 * not allocate scb. We will return non-zero status in that case.
1496 * NOTE: scb can be null even though certain commands completed
1497 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1498 * return 0 in that case, and we would do the callback right away.
1499 */
1500 if_busy = 0;
f2c8dc40 1501 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1da177e4
LT		 1502 if (!scb) { // command already completed
1503 done(scp);
1504 return 0;
1505 }
1506
f2c8dc40 1507 megaraid_mbox_runpendq(adapter, scb);
1da177e4
LT		 1508 return if_busy;
1509}
1510
1da177e4 1511/**
a69b74d3
RD		 1512 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
1513 * @adapter : controller's soft state
1514 * @scp : mid-layer scsi command pointer
1515 * @busy : set if request could not be completed because of lack of
1da177e4
LT		 1516 * resources
1517 *
a69b74d3
RD		 1518 * Transform the mid-layer scsi command to megaraid firmware lingua.
1519 * Convert the command issued by mid-layer to format understood by megaraid
1520 * firmware. We also complete certain commands without sending them to firmware.
1da177e4
LT		 1521 */
1522static scb_t *
1523megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1524{
1525 mraid_device_t *rdev = ADAP2RAIDDEV(adapter);
1526 int channel;
1527 int target;
1528 int islogical;
1529 mbox_ccb_t *ccb;
1530 mraid_passthru_t *pthru;
1531 mbox64_t *mbox64;
1532 mbox_t *mbox;
1533 scb_t *scb;
1534 char skip[] = "skipping";
1535 char scan[] = "scanning";
1536 char *ss;
1537
1538
1539 /*
1540 * Get the appropriate device map for the device this command is
1541 * intended for
1542 */
1543 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1544
1545 /*
1546 * Logical drive commands
1547 */
1548 if (islogical) {
1549 switch (scp->cmnd[0]) {
1550 case TEST_UNIT_READY:
1551 /*
1552 * Do we support clustering and is the support enabled
1553 * If no, return success always
1554 */
1555 if (!adapter->ha) {
1556 scp->result = (DID_OK << 16);
1557 return NULL;
1558 }
1559
1560 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1561 scp->result = (DID_ERROR << 16);
1562 *busy = 1;
1563 return NULL;
1564 }
1565
1566 scb->dma_direction = scp->sc_data_direction;
1567 scb->dev_channel = 0xFF;
1568 scb->dev_target = target;
1569 ccb = (mbox_ccb_t *)scb->ccb;
1570
1571 /*
1572 * The command id will be provided by the command
1573 * issuance routine
1574 */
1575 ccb->raw_mbox[0] = CLUSTER_CMD;
1576 ccb->raw_mbox[2] = RESERVATION_STATUS;
1577 ccb->raw_mbox[3] = target;
1578
1579 return scb;
1580
1581 case MODE_SENSE:
32fbac22
FT		 1582 {
1583 struct scatterlist *sgl;
1584 caddr_t vaddr;
1da177e4 1585
32fbac22
FT		 1586 sgl = scsi_sglist(scp);
1587 if (sgl->page) {
1588 vaddr = (caddr_t)
1589 (page_address((&sgl[0])->page)
1590 + (&sgl[0])->offset);
1da177e4 1591
32fbac22 1592 memset(vaddr, 0, scp->cmnd[4]);
1da177e4
LT		 1593 }
1594 else {
32fbac22
FT		 1595 con_log(CL_ANN, (KERN_WARNING
1596 "megaraid mailbox: invalid sg:%d\n",
1597 __LINE__));
1da177e4 1598 }
32fbac22
FT		 1599 }
1600 scp->result = (DID_OK << 16);
1601 return NULL;
1da177e4
LT		 1602
1603 case INQUIRY:
1604 /*
1605 * Display the channel scan for logical drives
1606 * Do not display scan for a channel if already done.
1607 */
1608 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1609
1610 con_log(CL_ANN, (KERN_INFO
1611 "scsi[%d]: scanning scsi channel %d",
1612 adapter->host->host_no,
1613 SCP2CHANNEL(scp)));
1614
1615 con_log(CL_ANN, (
1616 " [virtual] for logical drives\n"));
1617
1618 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1619 }
1620
aa677bc7
JS		 1621 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1622 scp->sense_buffer[0] = 0x70;
1623 scp->sense_buffer[2] = ILLEGAL_REQUEST;
1624 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB;
1625 scp->result = CHECK_CONDITION << 1;
1626 return NULL;
1627 }
1628
1da177e4
LT		 1629 /* Fall through */
1630
1631 case READ_CAPACITY:
1632 /*
1633 * Do not allow LUN > 0 for logical drives and
1634 * requests for more than 40 logical drives
1635 */
1636 if (SCP2LUN(scp)) {
1637 scp->result = (DID_BAD_TARGET << 16);
1638 return NULL;
1639 }
1640 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1641 scp->result = (DID_BAD_TARGET << 16);
1642 return NULL;
1643 }
1644
1645
1646 /* Allocate a SCB and initialize passthru */
1647 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1648 scp->result = (DID_ERROR << 16);
1649 *busy = 1;
1650 return NULL;
1651 }
1652
1653 ccb = (mbox_ccb_t *)scb->ccb;
1654 scb->dev_channel = 0xFF;
1655 scb->dev_target = target;
1656 pthru = ccb->pthru;
1657 mbox = ccb->mbox;
1658 mbox64 = ccb->mbox64;
1659
1660 pthru->timeout = 0;
1661 pthru->ars = 1;
1662 pthru->reqsenselen = 14;
1663 pthru->islogical = 1;
1664 pthru->logdrv = target;
1665 pthru->cdblen = scp->cmd_len;
1666 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1667
1668 mbox->cmd = MBOXCMD_PASSTHRU64;
1669 scb->dma_direction = scp->sc_data_direction;
1670
32fbac22 1671 pthru->dataxferlen = scsi_bufflen(scp);
1da177e4
LT		 1672 pthru->dataxferaddr = ccb->sgl_dma_h;
1673 pthru->numsge = megaraid_mbox_mksgl(adapter,
1674 scb);
1675
1676 mbox->xferaddr = 0xFFFFFFFF;
1677 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h;
1678 mbox64->xferaddr_hi = 0;
1679
1680 return scb;
1681
1682 case READ_6:
1683 case WRITE_6:
1684 case READ_10:
1685 case WRITE_10:
1686 case READ_12:
1687 case WRITE_12:
1688
1689 /*
1690 * Allocate a SCB and initialize mailbox
1691 */
1692 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1693 scp->result = (DID_ERROR << 16);
1694 *busy = 1;
1695 return NULL;
1696 }
1697 ccb = (mbox_ccb_t *)scb->ccb;
1698 scb->dev_channel = 0xFF;
1699 scb->dev_target = target;
1700 mbox = ccb->mbox;
1701 mbox64 = ccb->mbox64;
1702 mbox->logdrv = target;
1703
1704 /*
1705 * A little HACK: 2nd bit is zero for all scsi read
1706 * commands and is set for all scsi write commands
1707 */
1708 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64:
1709 MBOXCMD_LREAD64 ;
1710
1711 /*
1712 * 6-byte READ(0x08) or WRITE(0x0A) cdb
1713 */
1714 if (scp->cmd_len == 6) {
1715 mbox->numsectors = (uint32_t)scp->cmnd[4];
1716 mbox->lba =
1717 ((uint32_t)scp->cmnd[1] << 16) |
1718 ((uint32_t)scp->cmnd[2] << 8) |
1719 (uint32_t)scp->cmnd[3];
1720
1721 mbox->lba &= 0x1FFFFF;
1722 }
1723
1724 /*
1725 * 10-byte READ(0x28) or WRITE(0x2A) cdb
1726 */
1727 else if (scp->cmd_len == 10) {
1728 mbox->numsectors =
1729 (uint32_t)scp->cmnd[8] |
1730 ((uint32_t)scp->cmnd[7] << 8);
1731 mbox->lba =
1732 ((uint32_t)scp->cmnd[2] << 24) |
1733 ((uint32_t)scp->cmnd[3] << 16) |
1734 ((uint32_t)scp->cmnd[4] << 8) |
1735 (uint32_t)scp->cmnd[5];
1736 }
1737
1738 /*
1739 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1740 */
1741 else if (scp->cmd_len == 12) {
1742 mbox->lba =
1743 ((uint32_t)scp->cmnd[2] << 24) |
1744 ((uint32_t)scp->cmnd[3] << 16) |
1745 ((uint32_t)scp->cmnd[4] << 8) |
1746 (uint32_t)scp->cmnd[5];
1747
1748 mbox->numsectors =
1749 ((uint32_t)scp->cmnd[6] << 24) |
1750 ((uint32_t)scp->cmnd[7] << 16) |
1751 ((uint32_t)scp->cmnd[8] << 8) |
1752 (uint32_t)scp->cmnd[9];
1753 }
1754 else {
1755 con_log(CL_ANN, (KERN_WARNING
1756 "megaraid: unsupported CDB length\n"));
1757
1758 megaraid_dealloc_scb(adapter, scb);
1759
1760 scp->result = (DID_ERROR << 16);
1761 return NULL;
1762 }
1763
1764 scb->dma_direction = scp->sc_data_direction;
1765
1766 // Calculate Scatter-Gather info
1767 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h;
1768 mbox->numsge = megaraid_mbox_mksgl(adapter,
1769 scb);
1770 mbox->xferaddr = 0xFFFFFFFF;
1771 mbox64->xferaddr_hi = 0;
1772
1773 return scb;
1774
1775 case RESERVE:
1776 case RELEASE:
1777 /*
1778 * Do we support clustering and is the support enabled
1779 */
1780 if (!adapter->ha) {
1781 scp->result = (DID_BAD_TARGET << 16);
1782 return NULL;
1783 }
1784
1785 /*
1786 * Allocate a SCB and initialize mailbox
1787 */
1788 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1789 scp->result = (DID_ERROR << 16);
1790 *busy = 1;
1791 return NULL;
1792 }
1793
1794 ccb = (mbox_ccb_t *)scb->ccb;
1795 scb->dev_channel = 0xFF;
1796 scb->dev_target = target;
1797 ccb->raw_mbox[0] = CLUSTER_CMD;
1798 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ?
1799 RESERVE_LD : RELEASE_LD;
1800
1801 ccb->raw_mbox[3] = target;
1802 scb->dma_direction = scp->sc_data_direction;
1803
1804 return scb;
1805
1806 default:
1807 scp->result = (DID_BAD_TARGET << 16);
1808 return NULL;
1809 }
1810 }
1811 else { // Passthru device commands
1812
1813 // Do not allow access to target id > 15 or LUN > 7
1814 if (target > 15 || SCP2LUN(scp) > 7) {
1815 scp->result = (DID_BAD_TARGET << 16);
1816 return NULL;
1817 }
1818
1819 // if fast load option was set and scan for last device is
1820 // over, reset the fast_load flag so that during a possible
1821 // next scan, devices can be made available
1822 if (rdev->fast_load && (target == 15) &&
1823 (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1824
1825 con_log(CL_ANN, (KERN_INFO
1826 "megaraid[%d]: physical device scan re-enabled\n",
1827 adapter->host->host_no));
1828 rdev->fast_load = 0;
1829 }
1830
1831 /*
1832 * Display the channel scan for physical devices
1833 */
1834 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1835
1836 ss = rdev->fast_load ? skip : scan;
1837
1838 con_log(CL_ANN, (KERN_INFO
1839 "scsi[%d]: %s scsi channel %d [Phy %d]",
1840 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1841 channel));
1842
1843 con_log(CL_ANN, (
1844 " for non-raid devices\n"));
1845
1846 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1847 }
1848
1849 // disable channel sweep if fast load option given
1850 if (rdev->fast_load) {
1851 scp->result = (DID_BAD_TARGET << 16);
1852 return NULL;
1853 }
1854
1855 // Allocate a SCB and initialize passthru
1856 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1857 scp->result = (DID_ERROR << 16);
1858 *busy = 1;
1859 return NULL;
1860 }
1861
1862 ccb = (mbox_ccb_t *)scb->ccb;
1863 scb->dev_channel = channel;
1864 scb->dev_target = target;
1865 scb->dma_direction = scp->sc_data_direction;
1866 mbox = ccb->mbox;
1867 mbox64 = ccb->mbox64;
1868
1869 // Does this firmware support extended CDBs
1870 if (adapter->max_cdb_sz == 16) {
1871 mbox->cmd = MBOXCMD_EXTPTHRU;
1872
1873 megaraid_mbox_prepare_epthru(adapter, scb, scp);
1874
1875 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h;
1876 mbox64->xferaddr_hi = 0;
1877 mbox->xferaddr = 0xFFFFFFFF;
1878 }
1879 else {
1880 mbox->cmd = MBOXCMD_PASSTHRU64;
1881
1882 megaraid_mbox_prepare_pthru(adapter, scb, scp);
1883
1884 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h;
1885 mbox64->xferaddr_hi = 0;
1886 mbox->xferaddr = 0xFFFFFFFF;
1887 }
1888 return scb;
1889 }
1890
1891 // NOT REACHED
1892}
1893
1894
1895/**
1896 * megaraid_mbox_runpendq - execute commands queued in the pending queue
1897 * @adapter : controller's soft state
a69b74d3 1898 * @scb_q : SCB to be queued in the pending list
1da177e4 1899 *
a69b74d3 1900 * Scan the pending list for commands which are not yet issued and try to
1da177e4
LT		 1901 * post to the controller. The SCB can be a null pointer, which would indicate
1902 * no SCB to be queue, just try to execute the ones in the pending list.
1903 *
1904 * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1905 * out from the head of the pending list. If it is successfully issued, the
1906 * next SCB is at the head now.
1907 */
1908static void
1909megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1910{
1911 scb_t *scb;
1912 unsigned long flags;
1913
1914 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1915
1916 if (scb_q) {
1917 scb_q->state = SCB_PENDQ;
1918 list_add_tail(&scb_q->list, &adapter->pend_list);
1919 }
1920
1921 // if the adapter in not in quiescent mode, post the commands to FW
1922 if (adapter->quiescent) {
1923 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1924 return;
1925 }
1926
1927 while (!list_empty(&adapter->pend_list)) {
1928
1929 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1930
1931 scb = list_entry(adapter->pend_list.next, scb_t, list);
1932
1933 // remove the scb from the pending list and try to
1934 // issue. If we are unable to issue it, put back in
1935 // the pending list and return
1936
1937 list_del_init(&scb->list);
1938
1939 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1940
1941 // if mailbox was busy, return SCB back to pending
1942 // list. Make sure to add at the head, since that's
1943 // where it would have been removed from
1944
1945 scb->state = SCB_ISSUED;
1946
1947 if (mbox_post_cmd(adapter, scb) != 0) {
1948
1949 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1950
1951 scb->state = SCB_PENDQ;
1952
1953 list_add(&scb->list, &adapter->pend_list);
1954
1955 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1956 flags);
1957
1958 return;
1959 }
1960
1961 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1962 }
1963
1964 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1965
1966
1967 return;
1968}
1969
1970
1971/**
1972 * megaraid_mbox_prepare_pthru - prepare a command for physical devices
a69b74d3
RD		 1973 * @adapter : pointer to controller's soft state
1974 * @scb : scsi control block
1975 * @scp : scsi command from the mid-layer
1da177e4 1976 *
a69b74d3 1977 * Prepare a command for the scsi physical devices.
1da177e4
LT		 1978 */
1979static void
1980megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1981 struct scsi_cmnd *scp)
1982{
1983 mbox_ccb_t *ccb;
1984 mraid_passthru_t *pthru;
1985 uint8_t channel;
1986 uint8_t target;
1987
1988 ccb = (mbox_ccb_t *)scb->ccb;
1989 pthru = ccb->pthru;
1990 channel = scb->dev_channel;
1991 target = scb->dev_target;
1992
1993 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1994 pthru->timeout = 4;
1995 pthru->ars = 1;
1996 pthru->islogical = 0;
1997 pthru->channel = 0;
1998 pthru->target = (channel << 4) | target;
1999 pthru->logdrv = SCP2LUN(scp);
2000 pthru->reqsenselen = 14;
2001 pthru->cdblen = scp->cmd_len;
2002
2003 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2004
32fbac22
FT		 2005 if (scsi_bufflen(scp)) {
2006 pthru->dataxferlen = scsi_bufflen(scp);
1da177e4
LT		 2007 pthru->dataxferaddr = ccb->sgl_dma_h;
2008 pthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2009 }
2010 else {
2011 pthru->dataxferaddr = 0;
2012 pthru->dataxferlen = 0;
2013 pthru->numsge = 0;
2014 }
2015 return;
2016}
2017
2018
2019/**
2020 * megaraid_mbox_prepare_epthru - prepare a command for physical devices
a69b74d3
RD		 2021 * @adapter : pointer to controller's soft state
2022 * @scb : scsi control block
2023 * @scp : scsi command from the mid-layer
1da177e4 2024 *
a69b74d3
RD		 2025 * Prepare a command for the scsi physical devices. This rountine prepares
2026 * commands for devices which can take extended CDBs (>10 bytes).
1da177e4
LT		 2027 */
2028static void
2029megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2030 struct scsi_cmnd *scp)
2031{
2032 mbox_ccb_t *ccb;
2033 mraid_epassthru_t *epthru;
2034 uint8_t channel;
2035 uint8_t target;
2036
2037 ccb = (mbox_ccb_t *)scb->ccb;
2038 epthru = ccb->epthru;
2039 channel = scb->dev_channel;
2040 target = scb->dev_target;
2041
2042 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2043 epthru->timeout = 4;
2044 epthru->ars = 1;
2045 epthru->islogical = 0;
2046 epthru->channel = 0;
2047 epthru->target = (channel << 4) | target;
2048 epthru->logdrv = SCP2LUN(scp);
2049 epthru->reqsenselen = 14;
2050 epthru->cdblen = scp->cmd_len;
2051
2052 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2053
32fbac22
FT		 2054 if (scsi_bufflen(scp)) {
2055 epthru->dataxferlen = scsi_bufflen(scp);
1da177e4
LT		 2056 epthru->dataxferaddr = ccb->sgl_dma_h;
2057 epthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2058 }
2059 else {
2060 epthru->dataxferaddr = 0;
2061 epthru->dataxferlen = 0;
2062 epthru->numsge = 0;
2063 }
2064 return;
2065}
2066
2067
2068/**
2069 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
a69b74d3 2070 * @adapter : controller's soft state
1da177e4 2071 *
a69b74d3 2072 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
1da177e4
LT		 2073 * completed command and put them on the completed list for later processing.
2074 *
2075 * Returns: 1 if the interrupt is valid, 0 otherwise
2076 */
858119e1 2077static int
1da177e4
LT		 2078megaraid_ack_sequence(adapter_t *adapter)
2079{
2080 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2081 mbox_t *mbox;
2082 scb_t *scb;
2083 uint8_t nstatus;
2084 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS];
2085 struct list_head clist;
2086 int handled;
2087 uint32_t dword;
2088 unsigned long flags;
2089 int i, j;
2090
2091
2092 mbox = raid_dev->mbox;
2093
2094 // move the SCBs from the firmware completed array to our local list
2095 INIT_LIST_HEAD(&clist);
2096
2097 // loop till F/W has more commands for us to complete
2098 handled = 0;
2099 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2100 do {
2101 /*
2102 * Check if a valid interrupt is pending. If found, force the
2103 * interrupt line low.
2104 */
2105 dword = RDOUTDOOR(raid_dev);
2106 if (dword != 0x10001234) break;
2107
2108 handled = 1;
2109
2110 WROUTDOOR(raid_dev, 0x10001234);
2111
2112 nstatus = 0;
2113 // wait for valid numstatus to post
2114 for (i = 0; i < 0xFFFFF; i++) {
2115 if (mbox->numstatus != 0xFF) {
2116 nstatus = mbox->numstatus;
2117 break;
2118 }
2119 rmb();
2120 }
2121 mbox->numstatus = 0xFF;
2122
2123 adapter->outstanding_cmds -= nstatus;
2124
2125 for (i = 0; i < nstatus; i++) {
2126
2127 // wait for valid command index to post
2128 for (j = 0; j < 0xFFFFF; j++) {
2129 if (mbox->completed[i] != 0xFF) break;
2130 rmb();
2131 }
2132 completed[i] = mbox->completed[i];
2133 mbox->completed[i] = 0xFF;
2134
2135 if (completed[i] == 0xFF) {
2136 con_log(CL_ANN, (KERN_CRIT
2137 "megaraid: command posting timed out\n"));
2138
2139 BUG();
2140 continue;
2141 }
2142
2143 // Get SCB associated with this command id
2144 if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2145 // a cmm command
2146 scb = adapter->uscb_list + (completed[i] -
2147 MBOX_MAX_SCSI_CMDS);
2148 }
2149 else {
2150 // an os command
2151 scb = adapter->kscb_list + completed[i];
2152 }
2153
2154 scb->status = mbox->status;
2155 list_add_tail(&scb->list, &clist);
2156 }
2157
2158 // Acknowledge interrupt
2159 WRINDOOR(raid_dev, 0x02);
2160
2161 } while(1);
2162
2163 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2164
2165
2166 // put the completed commands in the completed list. DPC would
2167 // complete these commands later
2168 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2169
2170 list_splice(&clist, &adapter->completed_list);
2171
2172 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2173
2174
2175 // schedule the DPC if there is some work for it
2176 if (handled)
2177 tasklet_schedule(&adapter->dpc_h);
2178
2179 return handled;
2180}
2181
2182
2183/**
2184 * megaraid_isr - isr for memory based mailbox based controllers
a69b74d3
RD		 2185 * @irq : irq
2186 * @devp : pointer to our soft state
1da177e4
LT		 2187 *
2188 * Interrupt service routine for memory-mapped mailbox controllers.
2189 */
2190static irqreturn_t
7d12e780 2191megaraid_isr(int irq, void *devp)
1da177e4
LT		 2192{
2193 adapter_t *adapter = devp;
2194 int handled;
2195
2196 handled = megaraid_ack_sequence(adapter);
2197
2198 /* Loop through any pending requests */
2199 if (!adapter->quiescent) {
2200 megaraid_mbox_runpendq(adapter, NULL);
2201 }
2202
2203 return IRQ_RETVAL(handled);
2204}
2205
2206
2207/**
2208 * megaraid_mbox_sync_scb - sync kernel buffers
2209 * @adapter : controller's soft state
2210 * @scb : pointer to the resource packet
2211 *
2212 * DMA sync if required.
2213 */
858119e1 2214static void
1da177e4
LT		 2215megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2216{
2217 mbox_ccb_t *ccb;
2218
2219 ccb = (mbox_ccb_t *)scb->ccb;
2220
32fbac22
FT		 2221 if (scb->dma_direction == PCI_DMA_FROMDEVICE)
2222 pci_dma_sync_sg_for_cpu(adapter->pdev,
2223 scsi_sglist(scb->scp),
2224 scsi_sg_count(scb->scp),
1da177e4 2225 PCI_DMA_FROMDEVICE);
1da177e4 2226
32fbac22 2227 scsi_dma_unmap(scb->scp);
1da177e4
LT		 2228 return;
2229}
2230
2231
2232/**
2233 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2234 * @devp : pointer to HBA soft state
2235 *
2236 * Pick up the commands from the completed list and send back to the owners.
2237 * This is a reentrant function and does not assume any locks are held while
2238 * it is being called.
2239 */
2240static void
2241megaraid_mbox_dpc(unsigned long devp)
2242{
2243 adapter_t *adapter = (adapter_t *)devp;
2244 mraid_device_t *raid_dev;
2245 struct list_head clist;
2246 struct scatterlist *sgl;
2247 scb_t *scb;
2248 scb_t *tmp;
2249 struct scsi_cmnd *scp;
2250 mraid_passthru_t *pthru;
2251 mraid_epassthru_t *epthru;
2252 mbox_ccb_t *ccb;
2253 int islogical;
2254 int pdev_index;
2255 int pdev_state;
2256 mbox_t *mbox;
2257 unsigned long flags;
2258 uint8_t c;
2259 int status;
c005fb4f 2260 uioc_t *kioc;
1da177e4
LT		 2261
2262
2263 if (!adapter) return;
2264
2265 raid_dev = ADAP2RAIDDEV(adapter);
2266
2267 // move the SCBs from the completed list to our local list
2268 INIT_LIST_HEAD(&clist);
2269
2270 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2271
2272 list_splice_init(&adapter->completed_list, &clist);
2273
2274 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2275
2276
2277 list_for_each_entry_safe(scb, tmp, &clist, list) {
2278
2279 status = scb->status;
2280 scp = scb->scp;
2281 ccb = (mbox_ccb_t *)scb->ccb;
2282 pthru = ccb->pthru;
2283 epthru = ccb->epthru;
2284 mbox = ccb->mbox;
2285
2286 // Make sure f/w has completed a valid command
2287 if (scb->state != SCB_ISSUED) {
2288 con_log(CL_ANN, (KERN_CRIT
2289 "megaraid critical err: invalid command %d:%d:%p\n",
2290 scb->sno, scb->state, scp));
2291 BUG();
2292 continue; // Must never happen!
2293 }
2294
2295 // check for the management command and complete it right away
2296 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2297 scb->state = SCB_FREE;
2298 scb->status = status;
2299
2300 // remove from local clist
2301 list_del_init(&scb->list);
2302
c005fb4f
JS		 2303 kioc = (uioc_t *)scb->gp;
2304 kioc->status = 0;
2305
1da177e4
LT		 2306 megaraid_mbox_mm_done(adapter, scb);
2307
2308 continue;
2309 }
2310
2311 // Was an abort issued for this command earlier
2312 if (scb->state & SCB_ABORT) {
2313 con_log(CL_ANN, (KERN_NOTICE
2314 "megaraid: aborted cmd %lx[%x] completed\n",
2315 scp->serial_number, scb->sno));
2316 }
2317
2318 /*
2319 * If the inquiry came of a disk drive which is not part of
2320 * any RAID array, expose it to the kernel. For this to be
2321 * enabled, user must set the "megaraid_expose_unconf_disks"
2322 * flag to 1 by specifying it on module parameter list.
2323 * This would enable data migration off drives from other
2324 * configurations.
2325 */
2326 islogical = MRAID_IS_LOGICAL(adapter, scp);
2327 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2328 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2329
32fbac22
FT		 2330 sgl = scsi_sglist(scp);
2331 if (sgl->page) {
2332 c = *(unsigned char *)
1da177e4 2333 (page_address((&sgl[0])->page) +
32fbac22
FT		 2334 (&sgl[0])->offset);
2335 } else {
2336 con_log(CL_ANN, (KERN_WARNING
2337 "megaraid mailbox: invalid sg:%d\n",
2338 __LINE__));
2339 c = 0;
1da177e4
LT		 2340 }
2341
2342 if ((c & 0x1F ) == TYPE_DISK) {
2343 pdev_index = (scb->dev_channel * 16) +
2344 scb->dev_target;
2345 pdev_state =
2346 raid_dev->pdrv_state[pdev_index] & 0x0F;
2347
2348 if (pdev_state == PDRV_ONLINE ||
2349 pdev_state == PDRV_FAILED ||
2350 pdev_state == PDRV_RBLD ||
2351 pdev_state == PDRV_HOTSPARE ||
2352 megaraid_expose_unconf_disks == 0) {
2353
2354 status = 0xF0;
2355 }
2356 }
2357 }
2358
2359 // Convert MegaRAID status to Linux error code
2360 switch (status) {
2361
2362 case 0x00:
2363
2364 scp->result = (DID_OK << 16);
2365 break;
2366
2367 case 0x02:
2368
2369 /* set sense_buffer and result fields */
2370 if (mbox->cmd == MBOXCMD_PASSTHRU ||
2371 mbox->cmd == MBOXCMD_PASSTHRU64) {
2372
2373 memcpy(scp->sense_buffer, pthru->reqsensearea,
2374 14);
2375
2376 scp->result = DRIVER_SENSE << 24 |
2377 DID_OK << 16 | CHECK_CONDITION << 1;
2378 }
2379 else {
2380 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2381
2382 memcpy(scp->sense_buffer,
2383 epthru->reqsensearea, 14);
2384
2385 scp->result = DRIVER_SENSE << 24 |
2386 DID_OK << 16 |
2387 CHECK_CONDITION << 1;
2388 } else {
2389 scp->sense_buffer[0] = 0x70;
2390 scp->sense_buffer[2] = ABORTED_COMMAND;
2391 scp->result = CHECK_CONDITION << 1;
2392 }
2393 }
2394 break;
2395
2396 case 0x08:
2397
2398 scp->result = DID_BUS_BUSY << 16 | status;
2399 break;
2400
2401 default:
2402
2403 /*
2404 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2405 * failed
2406 */
2407 if (scp->cmnd[0] == TEST_UNIT_READY) {
2408 scp->result = DID_ERROR << 16 |
2409 RESERVATION_CONFLICT << 1;
2410 }
2411 else
2412 /*
2413 * Error code returned is 1 if Reserve or Release
2414 * failed or the input parameter is invalid
2415 */
2416 if (status == 1 && (scp->cmnd[0] == RESERVE ||
2417 scp->cmnd[0] == RELEASE)) {
2418
2419 scp->result = DID_ERROR << 16 |
2420 RESERVATION_CONFLICT << 1;
2421 }
2422 else {
2423 scp->result = DID_BAD_TARGET << 16 | status;
2424 }
2425 }
2426
2427 // print a debug message for all failed commands
2428 if (status) {
2429 megaraid_mbox_display_scb(adapter, scb);
2430 }
2431
2432 // Free our internal resources and call the mid-layer callback
2433 // routine
2434 megaraid_mbox_sync_scb(adapter, scb);
2435
2436 // remove from local clist
2437 list_del_init(&scb->list);
2438
2439 // put back in free list
2440 megaraid_dealloc_scb(adapter, scb);
2441
2442 // send the scsi packet back to kernel
1da177e4 2443 scp->scsi_done(scp);
1da177e4
LT		 2444 }
2445
2446 return;
2447}
2448
2449
2450/**
2451 * megaraid_abort_handler - abort the scsi command
2452 * @scp : command to be aborted
2453 *
2454 * Abort a previous SCSI request. Only commands on the pending list can be
2455 * aborted. All the commands issued to the F/W must complete.
2456 **/
2457static int
f2c8dc40 2458megaraid_abort_handler(struct scsi_cmnd *scp)
1da177e4
LT		 2459{
2460 adapter_t *adapter;
2461 mraid_device_t *raid_dev;
2462 scb_t *scb;
2463 scb_t *tmp;
2464 int found;
2465 unsigned long flags;
2466 int i;
2467
2468
2469 adapter = SCP2ADAPTER(scp);
2470 raid_dev = ADAP2RAIDDEV(adapter);
2471
1da177e4
LT		 2472 con_log(CL_ANN, (KERN_WARNING
2473 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2474 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2475 SCP2TARGET(scp), SCP2LUN(scp)));
2476
2477 // If FW has stopped responding, simply return failure
2478 if (raid_dev->hw_error) {
2479 con_log(CL_ANN, (KERN_NOTICE
2480 "megaraid: hw error, not aborting\n"));
2481 return FAILED;
2482 }
2483
2484 // There might a race here, where the command was completed by the
2485 // firmware and now it is on the completed list. Before we could
2486 // complete the command to the kernel in dpc, the abort came.
2487 // Find out if this is the case to avoid the race.
2488 scb = NULL;
2489 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2490 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2491
2492 if (scb->scp == scp) { // Found command
2493
2494 list_del_init(&scb->list); // from completed list
2495
2496 con_log(CL_ANN, (KERN_WARNING
2497 "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2498 scp->serial_number, scb->sno,
2499 scb->dev_channel, scb->dev_target));
2500
2501 scp->result = (DID_ABORT << 16);
2502 scp->scsi_done(scp);
2503
2504 megaraid_dealloc_scb(adapter, scb);
2505
2506 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2507 flags);
2508
2509 return SUCCESS;
2510 }
2511 }
2512 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2513
2514
2515 // Find out if this command is still on the pending list. If it is and
2516 // was never issued, abort and return success. If the command is owned
2517 // by the firmware, we must wait for it to complete by the FW.
2518 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2519 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2520
2521 if (scb->scp == scp) { // Found command
2522
2523 list_del_init(&scb->list); // from pending list
2524
2525 ASSERT(!(scb->state & SCB_ISSUED));
2526
2527 con_log(CL_ANN, (KERN_WARNING
2528 "megaraid abort: %ld[%d:%d], driver owner\n",
2529 scp->serial_number, scb->dev_channel,
2530 scb->dev_target));
2531
2532 scp->result = (DID_ABORT << 16);
2533 scp->scsi_done(scp);
2534
2535 megaraid_dealloc_scb(adapter, scb);
2536
2537 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2538 flags);
2539
2540 return SUCCESS;
2541 }
2542 }
2543 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2544
2545
2546 // Check do we even own this command, in which case this would be
2547 // owned by the firmware. The only way to locate the FW scb is to
2548 // traverse through the list of all SCB, since driver does not
2549 // maintain these SCBs on any list
2550 found = 0;
f2c8dc40 2551 spin_lock_irq(&adapter->lock);
1da177e4
LT		 2552 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2553 scb = adapter->kscb_list + i;
2554
2555 if (scb->scp == scp) {
2556
2557 found = 1;
2558
2559 if (!(scb->state & SCB_ISSUED)) {
2560 con_log(CL_ANN, (KERN_WARNING
2561 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2562 scp->serial_number, scb->sno, scb->dev_channel,
2563 scb->dev_target));
2564 BUG();
2565 }
2566 else {
2567 con_log(CL_ANN, (KERN_WARNING
2568 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2569 scp->serial_number, scb->sno, scb->dev_channel,
2570 scb->dev_target));
2571 }
2572 }
2573 }
f2c8dc40 2574 spin_unlock_irq(&adapter->lock);
1da177e4
LT		 2575
2576 if (!found) {
2577 con_log(CL_ANN, (KERN_WARNING
2578 "megaraid abort: scsi cmd:%ld, do now own\n",
2579 scp->serial_number));
2580
2581 // FIXME: Should there be a callback for this command?
2582 return SUCCESS;
2583 }
2584
2585 // We cannot actually abort a command owned by firmware, return
2586 // failure and wait for reset. In host reset handler, we will find out
2587 // if the HBA is still live
2588 return FAILED;
2589}
2590
1da177e4
LT		 2591/**
2592 * megaraid_reset_handler - device reset hadler for mailbox based driver
2593 * @scp : reference command
2594 *
2595 * Reset handler for the mailbox based controller. First try to find out if
2596 * the FW is still live, in which case the outstanding commands counter mut go
2597 * down to 0. If that happens, also issue the reservation reset command to
2598 * relinquish (possible) reservations on the logical drives connected to this
a69b74d3 2599 * host.
1da177e4
LT		 2600 **/
2601static int
f2c8dc40 2602megaraid_reset_handler(struct scsi_cmnd *scp)
1da177e4
LT		 2603{
2604 adapter_t *adapter;
2605 scb_t *scb;
2606 scb_t *tmp;
2607 mraid_device_t *raid_dev;
2608 unsigned long flags;
2609 uint8_t raw_mbox[sizeof(mbox_t)];
2610 int rval;
2611 int recovery_window;
2612 int recovering;
2613 int i;
c005fb4f 2614 uioc_t *kioc;
1da177e4
LT		 2615
2616 adapter = SCP2ADAPTER(scp);
2617 raid_dev = ADAP2RAIDDEV(adapter);
2618
1da177e4
LT		 2619 // return failure if adapter is not responding
2620 if (raid_dev->hw_error) {
2621 con_log(CL_ANN, (KERN_NOTICE
2622 "megaraid: hw error, cannot reset\n"));
2623 return FAILED;
2624 }
2625
2626
2627 // Under exceptional conditions, FW can take up to 3 minutes to
2628 // complete command processing. Wait for additional 2 minutes for the
2629 // pending commands counter to go down to 0. If it doesn't, let the
2630 // controller be marked offline
2631 // Also, reset all the commands currently owned by the driver
2632 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2633 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
1da177e4
LT		 2634 list_del_init(&scb->list); // from pending list
2635
c005fb4f
JS		 2636 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2637 con_log(CL_ANN, (KERN_WARNING
2638 "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2639 scb->sno, scb->dev_channel, scb->dev_target));
1da177e4 2640
c005fb4f 2641 scb->status = -1;
1da177e4 2642
c005fb4f
JS		 2643 kioc = (uioc_t *)scb->gp;
2644 kioc->status = -EFAULT;
2645
2646 megaraid_mbox_mm_done(adapter, scb);
2647 } else {
2648 if (scb->scp == scp) { // Found command
2649 con_log(CL_ANN, (KERN_WARNING
2650 "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2651 scp->serial_number, scb->sno,
2652 scb->dev_channel, scb->dev_target));
2653 } else {
2654 con_log(CL_ANN, (KERN_WARNING
2655 "megaraid: IO packet with %d[%d:%d] being reset\n",
2656 scb->sno, scb->dev_channel, scb->dev_target));
2657 }
2658
2659 scb->scp->result = (DID_RESET << 16);
2660 scb->scp->scsi_done(scb->scp);
2661
2662 megaraid_dealloc_scb(adapter, scb);
2663 }
1da177e4
LT		 2664 }
2665 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2666
2667 if (adapter->outstanding_cmds) {
2668 con_log(CL_ANN, (KERN_NOTICE
2669 "megaraid: %d outstanding commands. Max wait %d sec\n",
c005fb4f
JS		 2670 adapter->outstanding_cmds,
2671 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
1da177e4
LT		 2672 }
2673
1da177e4
LT		 2674 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2675
2676 recovering = adapter->outstanding_cmds;
2677
c005fb4f 2678 for (i = 0; i < recovery_window; i++) {
1da177e4
LT		 2679
2680 megaraid_ack_sequence(adapter);
2681
2682 // print a message once every 5 seconds only
2683 if (!(i % 5)) {
2684 con_log(CL_ANN, (
2685 "megaraid mbox: Wait for %d commands to complete:%d\n",
2686 adapter->outstanding_cmds,
c005fb4f 2687 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
1da177e4
LT		 2688 }
2689
2690 // bailout if no recovery happended in reset time
c005fb4f 2691 if (adapter->outstanding_cmds == 0) {
1da177e4
LT		 2692 break;
2693 }
2694
2695 msleep(1000);
2696 }
2697
f2c8dc40 2698 spin_lock(&adapter->lock);
1da177e4
LT		 2699
2700 // If still outstanding commands, bail out
2701 if (adapter->outstanding_cmds) {
2702 con_log(CL_ANN, (KERN_WARNING
2703 "megaraid mbox: critical hardware error!\n"));
2704
2705 raid_dev->hw_error = 1;
2706
f2c8dc40
CH		 2707 rval = FAILED;
2708 goto out;
1da177e4
LT		 2709 }
2710 else {
2711 con_log(CL_ANN, (KERN_NOTICE
2712 "megaraid mbox: reset sequence completed sucessfully\n"));
2713 }
2714
2715
2716 // If the controller supports clustering, reset reservations
f2c8dc40
CH		 2717 if (!adapter->ha) {
2718 rval = SUCCESS;
2719 goto out;
2720 }
1da177e4
LT		 2721
2722 // clear reservations if any
2723 raw_mbox[0] = CLUSTER_CMD;
2724 raw_mbox[2] = RESET_RESERVATIONS;
2725
2726 rval = SUCCESS;
2727 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2728 con_log(CL_ANN,
2729 (KERN_INFO "megaraid: reservation reset\n"));
2730 }
2731 else {
2732 rval = FAILED;
2733 con_log(CL_ANN, (KERN_WARNING
2734 "megaraid: reservation reset failed\n"));
2735 }
2736
f2c8dc40
CH		 2737 out:
2738 spin_unlock_irq(&adapter->lock);
1da177e4
LT		 2739 return rval;
2740}
2741
1da177e4
LT		 2742/*
2743 * START: internal commands library
2744 *
2745 * This section of the driver has the common routine used by the driver and
2746 * also has all the FW routines
2747 */
2748
2749/**
2750 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
a69b74d3
RD		 2751 * @adapter : controller's soft state
2752 * @raw_mbox : the mailbox
1da177e4
LT		 2753 *
2754 * Issue a scb in synchronous and non-interrupt mode for mailbox based
a69b74d3 2755 * controllers.
1da177e4
LT		 2756 */
2757static int
2758mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2759{
2760 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2761 mbox64_t *mbox64;
2762 mbox_t *mbox;
2763 uint8_t status;
2764 int i;
2765
2766
2767 mbox64 = raid_dev->mbox64;
2768 mbox = raid_dev->mbox;
2769
2770 /*
2771 * Wait until mailbox is free
2772 */
2773 if (megaraid_busywait_mbox(raid_dev) != 0)
2774 goto blocked_mailbox;
2775
2776 /*
2777 * Copy mailbox data into host structure
2778 */
2779 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2780 mbox->cmdid = 0xFE;
2781 mbox->busy = 1;
2782 mbox->poll = 0;
2783 mbox->ack = 0;
2784 mbox->numstatus = 0xFF;
2785 mbox->status = 0xFF;
2786
2787 wmb();
2788 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2789
2790 // wait for maximum 1 second for status to post. If the status is not
2791 // available within 1 second, assume FW is initializing and wait
2792 // for an extended amount of time
2793 if (mbox->numstatus == 0xFF) { // status not yet available
53b3531b 2794 udelay(25);
1da177e4
LT		 2795
2796 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2797 rmb();
2798 msleep(1);
2799 }
2800
2801
2802 if (i == 1000) {
2803 con_log(CL_ANN, (KERN_NOTICE
2804 "megaraid mailbox: wait for FW to boot "));
2805
2806 for (i = 0; (mbox->numstatus == 0xFF) &&
2807 (i < MBOX_RESET_WAIT); i++) {
2808 rmb();
2809 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2810 MBOX_RESET_WAIT - i));
2811 msleep(1000);
2812 }
2813
2814 if (i == MBOX_RESET_WAIT) {
2815
2816 con_log(CL_ANN, (
2817 "\nmegaraid mailbox: status not available\n"));
2818
2819 return -1;
2820 }
2821 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2822 }
2823 }
2824
2825 // wait for maximum 1 second for poll semaphore
2826 if (mbox->poll != 0x77) {
2827 udelay(25);
2828
2829 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2830 rmb();
2831 msleep(1);
2832 }
2833
2834 if (i == 1000) {
2835 con_log(CL_ANN, (KERN_WARNING
2836 "megaraid mailbox: could not get poll semaphore\n"));
2837 return -1;
2838 }
2839 }
2840
2841 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2842 wmb();
2843
2844 // wait for maximum 1 second for acknowledgement
2845 if (RDINDOOR(raid_dev) & 0x2) {
2846 udelay(25);
2847
2848 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2849 rmb();
2850 msleep(1);
2851 }
2852
2853 if (i == 1000) {
2854 con_log(CL_ANN, (KERN_WARNING
2855 "megaraid mailbox: could not acknowledge\n"));
2856 return -1;
2857 }
2858 }
2859 mbox->poll = 0;
2860 mbox->ack = 0x77;
2861
2862 status = mbox->status;
2863
2864 // invalidate the completed command id array. After command
2865 // completion, firmware would write the valid id.
2866 mbox->numstatus = 0xFF;
2867 mbox->status = 0xFF;
2868 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2869 mbox->completed[i] = 0xFF;
2870 }
2871
2872 return status;
2873
2874blocked_mailbox:
2875
2876 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2877 return -1;
2878}
2879
2880
2881/**
2882 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
a69b74d3
RD		 2883 * @adapter : controller's soft state
2884 * @raw_mbox : the mailbox
1da177e4
LT		 2885 *
2886 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2887 * controllers. This is a faster version of the synchronous command and
a69b74d3 2888 * therefore can be called in interrupt-context as well.
1da177e4
LT		 2889 */
2890static int
2891mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2892{
2893 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2894 mbox_t *mbox;
2895 long i;
2896
2897
2898 mbox = raid_dev->mbox;
2899
2900 // return immediately if the mailbox is busy
2901 if (mbox->busy) return -1;
2902
2903 // Copy mailbox data into host structure
2904 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2905 mbox->cmdid = 0xFE;
2906 mbox->busy = 1;
2907 mbox->poll = 0;
2908 mbox->ack = 0;
2909 mbox->numstatus = 0xFF;
2910 mbox->status = 0xFF;
2911
2912 wmb();
2913 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2914
c005fb4f 2915 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
1da177e4 2916 if (mbox->numstatus != 0xFF) break;
ed7e8ef7 2917 rmb();
c005fb4f 2918 udelay(MBOX_SYNC_DELAY_200);
1da177e4
LT		 2919 }
2920
c005fb4f 2921 if (i == MBOX_SYNC_WAIT_CNT) {
1da177e4
LT		 2922 // We may need to re-calibrate the counter
2923 con_log(CL_ANN, (KERN_CRIT
2924 "megaraid: fast sync command timed out\n"));
2925 }
2926
2927 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2928 wmb();
2929
2930 return mbox->status;
2931}
2932
2933
2934/**
2935 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
a69b74d3 2936 * @raid_dev : RAID device (HBA) soft state
1da177e4 2937 *
a69b74d3
RD		 2938 * Wait until the controller's mailbox is available to accept more commands.
2939 * Wait for at most 1 second.
1da177e4
LT		 2940 */
2941static int
2942megaraid_busywait_mbox(mraid_device_t *raid_dev)
2943{
2944 mbox_t *mbox = raid_dev->mbox;
2945 int i = 0;
2946
2947 if (mbox->busy) {
2948 udelay(25);
2949 for (i = 0; mbox->busy && i < 1000; i++)
2950 msleep(1);
2951 }
2952
2953 if (i < 1000) return 0;
2954 else return -1;
2955}
2956
2957
2958/**
2959 * megaraid_mbox_product_info - some static information about the controller
a69b74d3 2960 * @adapter : our soft state
1da177e4 2961 *
a69b74d3 2962 * Issue commands to the controller to grab some parameters required by our
1da177e4
LT		 2963 * caller.
2964 */
2965static int
2966megaraid_mbox_product_info(adapter_t *adapter)
2967{
2968 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2969 mbox_t *mbox;
2970 uint8_t raw_mbox[sizeof(mbox_t)];
2971 mraid_pinfo_t *pinfo;
2972 dma_addr_t pinfo_dma_h;
2973 mraid_inquiry3_t *mraid_inq3;
2974 int i;
2975
2976
2977 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2978 mbox = (mbox_t *)raw_mbox;
2979
2980 /*
2981 * Issue an ENQUIRY3 command to find out certain adapter parameters,
2982 * e.g., max channels, max commands etc.
2983 */
2984 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
2985 &pinfo_dma_h);
2986
2987 if (pinfo == NULL) {
2988 con_log(CL_ANN, (KERN_WARNING
2989 "megaraid: out of memory, %s %d\n", __FUNCTION__,
2990 __LINE__));
2991
2992 return -1;
2993 }
2994 memset(pinfo, 0, sizeof(mraid_pinfo_t));
2995
2996 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
2997 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
2998
2999 raw_mbox[0] = FC_NEW_CONFIG;
3000 raw_mbox[2] = NC_SUBOP_ENQUIRY3;
3001 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
3002
3003 // Issue the command
3004 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3005
3006 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3007
3008 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3009 pinfo, pinfo_dma_h);
3010
3011 return -1;
3012 }
3013
3014 /*
3015 * Collect information about state of each physical drive
3016 * attached to the controller. We will expose all the disks
3017 * which are not part of RAID
3018 */
3019 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3020 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3021 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3022 }
3023
3024 /*
3025 * Get product info for information like number of channels,
3026 * maximum commands supported.
3027 */
3028 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3029 mbox->xferaddr = (uint32_t)pinfo_dma_h;
3030
3031 raw_mbox[0] = FC_NEW_CONFIG;
3032 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3033
3034 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3035
3036 con_log(CL_ANN, (KERN_WARNING
3037 "megaraid: product info failed\n"));
3038
3039 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3040 pinfo, pinfo_dma_h);
3041
3042 return -1;
3043 }
3044
3045 /*
3046 * Setup some parameters for host, as required by our caller
3047 */
3048 adapter->max_channel = pinfo->nchannels;
3049
3050 /*
3051 * we will export all the logical drives on a single channel.
3052 * Add 1 since inquires do not come for inititor ID
3053 */
3054 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1;
3055 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices
3056
3057 /*
3058 * These are the maximum outstanding commands for the scsi-layer
3059 */
3060 adapter->max_cmds = MBOX_MAX_SCSI_CMDS;
3061
3062 memset(adapter->fw_version, 0, VERSION_SIZE);
3063 memset(adapter->bios_version, 0, VERSION_SIZE);
3064
3065 memcpy(adapter->fw_version, pinfo->fw_version, 4);
3066 adapter->fw_version[4] = 0;
3067
3068 memcpy(adapter->bios_version, pinfo->bios_version, 4);
3069 adapter->bios_version[4] = 0;
3070
3071 con_log(CL_ANN, (KERN_NOTICE
3072 "megaraid: fw version:[%s] bios version:[%s]\n",
3073 adapter->fw_version, adapter->bios_version));
3074
3075 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3076 pinfo_dma_h);
3077
3078 return 0;
3079}
3080
3081
3082
3083/**
3084 * megaraid_mbox_extended_cdb - check for support for extended CDBs
a69b74d3 3085 * @adapter : soft state for the controller
1da177e4 3086 *
a69b74d3
RD		 3087 * This routine check whether the controller in question supports extended
3088 * ( > 10 bytes ) CDBs.
1da177e4
LT		 3089 */
3090static int
3091megaraid_mbox_extended_cdb(adapter_t *adapter)
3092{
3093 mbox_t *mbox;
3094 uint8_t raw_mbox[sizeof(mbox_t)];
3095 int rval;
3096
3097 mbox = (mbox_t *)raw_mbox;
3098
3099 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3100 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3101
3102 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3103
3104 raw_mbox[0] = MAIN_MISC_OPCODE;
3105 raw_mbox[2] = SUPPORT_EXT_CDB;
3106
3107 /*
3108 * Issue the command
3109 */
3110 rval = 0;
3111 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3112 rval = -1;
3113 }
3114
3115 return rval;
3116}
3117
3118
3119/**
3120 * megaraid_mbox_support_ha - Do we support clustering
a69b74d3
RD		 3121 * @adapter : soft state for the controller
3122 * @init_id : ID of the initiator
1da177e4
LT		 3123 *
3124 * Determine if the firmware supports clustering and the ID of the initiator.
3125 */
3126static int
3127megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3128{
3129 mbox_t *mbox;
3130 uint8_t raw_mbox[sizeof(mbox_t)];
3131 int rval;
3132
3133
3134 mbox = (mbox_t *)raw_mbox;
3135
3136 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3137
3138 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3139
3140 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3141
3142 raw_mbox[0] = GET_TARGET_ID;
3143
3144 // Issue the command
3145 *init_id = 7;
3146 rval = -1;
3147 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3148
3149 *init_id = *(uint8_t *)adapter->ibuf;
3150
3151 con_log(CL_ANN, (KERN_INFO
3152 "megaraid: cluster firmware, initiator ID: %d\n",
3153 *init_id));
3154
3155 rval = 0;
3156 }
3157
3158 return rval;
3159}
3160
3161
3162/**
3163 * megaraid_mbox_support_random_del - Do we support random deletion
a69b74d3 3164 * @adapter : soft state for the controller
1da177e4 3165 *
a69b74d3 3166 * Determine if the firmware supports random deletion.
1da177e4
LT		 3167 * Return: 1 is operation supported, 0 otherwise
3168 */
3169static int
3170megaraid_mbox_support_random_del(adapter_t *adapter)
3171{
3172 mbox_t *mbox;
3173 uint8_t raw_mbox[sizeof(mbox_t)];
3174 int rval;
3175
3176
3177 mbox = (mbox_t *)raw_mbox;
3178
3179 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3180
3181 raw_mbox[0] = FC_DEL_LOGDRV;
3182 raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3183
3184 // Issue the command
3185 rval = 0;
3186 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3187
3188 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3189
3190 rval = 1;
3191 }
3192
3193 return rval;
3194}
3195
3196
3197/**
3198 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
a69b74d3 3199 * @adapter : soft state for the controller
1da177e4
LT		 3200 *
3201 * Find out the maximum number of scatter-gather elements supported by the
a69b74d3 3202 * firmware.
1da177e4
LT		 3203 */
3204static int
3205megaraid_mbox_get_max_sg(adapter_t *adapter)
3206{
3207 mbox_t *mbox;
3208 uint8_t raw_mbox[sizeof(mbox_t)];
3209 int nsg;
3210
3211
3212 mbox = (mbox_t *)raw_mbox;
3213
3214 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3215
3216 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3217
3218 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3219
3220 raw_mbox[0] = MAIN_MISC_OPCODE;
3221 raw_mbox[2] = GET_MAX_SG_SUPPORT;
3222
3223 // Issue the command
3224 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3225 nsg = *(uint8_t *)adapter->ibuf;
3226 }
3227 else {
3228 nsg = MBOX_DEFAULT_SG_SIZE;
3229 }
3230
3231 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3232
3233 return nsg;
3234}
3235
3236
3237/**
3238 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
a69b74d3 3239 * @adapter : soft state for the controller
1da177e4 3240 *
a69b74d3
RD		 3241 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3242 * can be exported as regular SCSI channels.
1da177e4
LT		 3243 */
3244static void
3245megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3246{
3247 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3248 mbox_t *mbox;
3249 uint8_t raw_mbox[sizeof(mbox_t)];
3250
3251
3252 mbox = (mbox_t *)raw_mbox;
3253
3254 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3255
3256 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3257
3258 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3259
3260 raw_mbox[0] = CHNL_CLASS;
3261 raw_mbox[2] = GET_CHNL_CLASS;
3262
3263 // Issue the command. If the command fails, all channels are RAID
3264 // channels
3265 raid_dev->channel_class = 0xFF;
3266 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3267 raid_dev->channel_class = *(uint8_t *)adapter->ibuf;
3268 }
3269
3270 return;
3271}
3272
3273
3274/**
3275 * megaraid_mbox_flush_cache - flush adapter and disks cache
a69b74d3 3276 * @adapter : soft state for the controller
1da177e4 3277 *
a69b74d3 3278 * Flush adapter cache followed by disks cache.
1da177e4
LT		 3279 */
3280static void
3281megaraid_mbox_flush_cache(adapter_t *adapter)
3282{
3283 mbox_t *mbox;
3284 uint8_t raw_mbox[sizeof(mbox_t)];
3285
3286
3287 mbox = (mbox_t *)raw_mbox;
3288
3289 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3290
3291 raw_mbox[0] = FLUSH_ADAPTER;
3292
3293 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3294 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3295 }
3296
3297 raw_mbox[0] = FLUSH_SYSTEM;
3298
3299 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3300 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3301 }
3302
3303 return;
3304}
3305
3306
cd96d96f
SP		 3307/**
3308 * megaraid_mbox_fire_sync_cmd - fire the sync cmd
a69b74d3 3309 * @adapter : soft state for the controller
cd96d96f 3310 *
a69b74d3 3311 * Clears the pending cmds in FW and reinits its RAID structs.
cd96d96f
SP		 3312 */
3313static int
3314megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3315{
3316 mbox_t *mbox;
3317 uint8_t raw_mbox[sizeof(mbox_t)];
3318 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3319 mbox64_t *mbox64;
3320 int status = 0;
3321 int i;
3322 uint32_t dword;
3323
3324 mbox = (mbox_t *)raw_mbox;
3325
3326 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3327
3328 raw_mbox[0] = 0xFF;
3329
3330 mbox64 = raid_dev->mbox64;
3331 mbox = raid_dev->mbox;
3332
3333 /* Wait until mailbox is free */
3334 if (megaraid_busywait_mbox(raid_dev) != 0) {
3335 status = 1;
3336 goto blocked_mailbox;
3337 }
3338
3339 /* Copy mailbox data into host structure */
3340 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3341 mbox->cmdid = 0xFE;
3342 mbox->busy = 1;
3343 mbox->poll = 0;
3344 mbox->ack = 0;
3345 mbox->numstatus = 0;
3346 mbox->status = 0;
3347
3348 wmb();
3349 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3350
3351 /* Wait for maximum 1 min for status to post.
3352 * If the Firmware SUPPORTS the ABOVE COMMAND,
3353 * mbox->cmd will be set to 0
3354 * else
3355 * the firmware will reject the command with
3356 * mbox->numstatus set to 1
3357 */
3358
3359 i = 0;
3360 status = 0;
3361 while (!mbox->numstatus && mbox->cmd == 0xFF) {
3362 rmb();
3363 msleep(1);
3364 i++;
3365 if (i > 1000 * 60) {
3366 status = 1;
3367 break;
3368 }
3369 }
3370 if (mbox->numstatus == 1)
3371 status = 1; /*cmd not supported*/
3372
3373 /* Check for interrupt line */
3374 dword = RDOUTDOOR(raid_dev);
3375 WROUTDOOR(raid_dev, dword);
3376 WRINDOOR(raid_dev,2);
3377
3378 return status;
3379
3380blocked_mailbox:
3381 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3382 return status;
3383}
3384
1da177e4
LT		 3385/**
3386 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
a69b74d3
RD		 3387 * @adapter : controller's soft state
3388 * @scb : SCB to be displayed
3389 * @level : debug level for console print
1da177e4
LT		 3390 *
3391 * Diplay information about the given SCB iff the current debug level is
a69b74d3 3392 * verbose.
1da177e4
LT		 3393 */
3394static void
3395megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3396{
3397 mbox_ccb_t *ccb;
3398 struct scsi_cmnd *scp;
3399 mbox_t *mbox;
3400 int level;
3401 int i;
3402
3403
3404 ccb = (mbox_ccb_t *)scb->ccb;
3405 scp = scb->scp;
3406 mbox = ccb->mbox;
3407
3408 level = CL_DLEVEL3;
3409
3410 con_log(level, (KERN_NOTICE
3411 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3412 mbox->cmd, scb->sno));
3413
3414 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3415 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3416 mbox->numsge));
3417
3418 if (!scp) return;
3419
3420 con_log(level, (KERN_NOTICE "scsi cmnd: "));
3421
3422 for (i = 0; i < scp->cmd_len; i++) {
3423 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3424 }
3425
3426 con_log(level, ("\n"));
3427
3428 return;
3429}
3430
3431
3432/**
3433 * megaraid_mbox_setup_device_map - manage device ids
3434 * @adapter : Driver's soft state
3435 *
3436 * Manange the device ids to have an appropraite mapping between the kernel
3437 * scsi addresses and megaraid scsi and logical drive addresses. We export
3438 * scsi devices on their actual addresses, whereas the logical drives are
3439 * exported on a virtual scsi channel.
a69b74d3 3440 */
1da177e4
LT		 3441static void
3442megaraid_mbox_setup_device_map(adapter_t *adapter)
3443{
3444 uint8_t c;
3445 uint8_t t;
3446
3447 /*
3448 * First fill the values on the logical drive channel
3449 */
3450 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3451 adapter->device_ids[adapter->max_channel][t] =
3452 (t < adapter->init_id) ? t : t - 1;
3453
3454 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3455
3456 /*
3457 * Fill the values on the physical devices channels
3458 */
3459 for (c = 0; c < adapter->max_channel; c++)
3460 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3461 adapter->device_ids[c][t] = (c << 8) | t;
3462}
3463
3464
3465/*
3466 * END: internal commands library
3467 */
3468
3469/*
3470 * START: Interface for the common management module
3471 *
3472 * This is the module, which interfaces with the common mangement module to
3473 * provide support for ioctl and sysfs
3474 */
3475
3476/**
3477 * megaraid_cmm_register - register with the mangement module
a69b74d3 3478 * @adapter : HBA soft state
1da177e4
LT		 3479 *
3480 * Register with the management module, which allows applications to issue
3481 * ioctl calls to the drivers. This interface is used by the management module
3482 * to setup sysfs support as well.
3483 */
3484static int
3485megaraid_cmm_register(adapter_t *adapter)
3486{
3487 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3488 mraid_mmadp_t adp;
3489 scb_t *scb;
3490 mbox_ccb_t *ccb;
3491 int rval;
3492 int i;
3493
3494 // Allocate memory for the base list of scb for management module.
dd00cc48 3495 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL);
1da177e4
LT		 3496
3497 if (adapter->uscb_list == NULL) {
3498 con_log(CL_ANN, (KERN_WARNING
3499 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3500 __LINE__));
3501 return -1;
3502 }
1da177e4
LT		 3503
3504
3505 // Initialize the synchronization parameters for resources for
3506 // commands for management module
3507 INIT_LIST_HEAD(&adapter->uscb_pool);
3508
3509 spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3510
3511
3512
3513 // link all the packets. Note, CCB for commands, coming from the
3514 // commom management module, mailbox physical address are already
3515 // setup by it. We just need placeholder for that in our local command
3516 // control blocks
3517 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3518
3519 scb = adapter->uscb_list + i;
3520 ccb = raid_dev->uccb_list + i;
3521
3522 scb->ccb = (caddr_t)ccb;
3523 ccb->mbox64 = raid_dev->umbox64 + i;
3524 ccb->mbox = &ccb->mbox64->mbox32;
3525 ccb->raw_mbox = (uint8_t *)ccb->mbox;
3526
3527 scb->gp = 0;
3528
3529 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3530 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3531 scb->sno = i + MBOX_MAX_SCSI_CMDS;
3532
3533 scb->scp = NULL;
3534 scb->state = SCB_FREE;
3535 scb->dma_direction = PCI_DMA_NONE;
3536 scb->dma_type = MRAID_DMA_NONE;
3537 scb->dev_channel = -1;
3538 scb->dev_target = -1;
3539
3540 // put scb in the free pool
3541 list_add_tail(&scb->list, &adapter->uscb_pool);
3542 }
3543
3544 adp.unique_id = adapter->unique_id;
3545 adp.drvr_type = DRVRTYPE_MBOX;
3546 adp.drvr_data = (unsigned long)adapter;
3547 adp.pdev = adapter->pdev;
3548 adp.issue_uioc = megaraid_mbox_mm_handler;
c005fb4f 3549 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
1da177e4
LT		 3550 adp.max_kioc = MBOX_MAX_USER_CMDS;
3551
3552 if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3553
3554 con_log(CL_ANN, (KERN_WARNING
3555 "megaraid mbox: did not register with CMM\n"));
3556
3557 kfree(adapter->uscb_list);
3558 }
3559
3560 return rval;
3561}
3562
3563
3564/**
3565 * megaraid_cmm_unregister - un-register with the mangement module
a69b74d3 3566 * @adapter : HBA soft state
1da177e4
LT		 3567 *
3568 * Un-register with the management module.
3569 * FIXME: mgmt module must return failure for unregister if it has pending
a69b74d3 3570 * commands in LLD.
1da177e4
LT		 3571 */
3572static int
3573megaraid_cmm_unregister(adapter_t *adapter)
3574{
3575 kfree(adapter->uscb_list);
3576 mraid_mm_unregister_adp(adapter->unique_id);
3577 return 0;
3578}
3579
3580
3581/**
3582 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
a69b74d3
RD		 3583 * @drvr_data : LLD specific data
3584 * @kioc : CMM interface packet
3585 * @action : command action
1da177e4
LT		 3586 *
3587 * This routine is invoked whenever the Common Mangement Module (CMM) has a
3588 * command for us. The 'action' parameter specifies if this is a new command
3589 * or otherwise.
3590 */
3591static int
3592megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3593{
3594 adapter_t *adapter;
3595
3596 if (action != IOCTL_ISSUE) {
3597 con_log(CL_ANN, (KERN_WARNING
3598 "megaraid: unsupported management action:%#2x\n",
3599 action));
3600 return (-ENOTSUPP);
3601 }
3602
3603 adapter = (adapter_t *)drvr_data;
3604
3605 // make sure this adapter is not being detached right now.
3606 if (atomic_read(&adapter->being_detached)) {
3607 con_log(CL_ANN, (KERN_WARNING
3608 "megaraid: reject management request, detaching\n"));
3609 return (-ENODEV);
3610 }
3611
3612 switch (kioc->opcode) {
3613
3614 case GET_ADAP_INFO:
3615
3616 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *)
3617 (unsigned long)kioc->buf_vaddr);
3618
3619 kioc->done(kioc);
3620
3621 return kioc->status;
3622
3623 case MBOX_CMD:
3624
3625 return megaraid_mbox_mm_command(adapter, kioc);
3626
3627 default:
3628 kioc->status = (-EINVAL);
3629 kioc->done(kioc);
3630 return (-EINVAL);
3631 }
3632
3633 return 0; // not reached
3634}
3635
3636/**
3637 * megaraid_mbox_mm_command - issues commands routed through CMM
a69b74d3
RD		 3638 * @adapter : HBA soft state
3639 * @kioc : management command packet
1da177e4
LT		 3640 *
3641 * Issues commands, which are routed through the management module.
3642 */
3643static int
3644megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3645{
3646 struct list_head *head = &adapter->uscb_pool;
3647 mbox64_t *mbox64;
3648 uint8_t *raw_mbox;
3649 scb_t *scb;
3650 mbox_ccb_t *ccb;
3651 unsigned long flags;
3652
3653 // detach one scb from free pool
3654 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3655
3656 if (list_empty(head)) { // should never happen because of CMM
3657
3658 con_log(CL_ANN, (KERN_WARNING
3659 "megaraid mbox: bug in cmm handler, lost resources\n"));
3660
3661 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3662
3663 return (-EINVAL);
3664 }
3665
3666 scb = list_entry(head->next, scb_t, list);
3667 list_del_init(&scb->list);
3668
3669 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3670
3671 scb->state = SCB_ACTIVE;
3672 scb->dma_type = MRAID_DMA_NONE;
3673 scb->dma_direction = PCI_DMA_NONE;
3674
3675 ccb = (mbox_ccb_t *)scb->ccb;
3676 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3677 raw_mbox = (uint8_t *)&mbox64->mbox32;
3678
3679 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3680
3681 scb->gp = (unsigned long)kioc;
3682
3683 /*
3684 * If it is a logdrv random delete operation, we have to wait till
3685 * there are no outstanding cmds at the fw and then issue it directly
3686 */
3687 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3688
3689 if (wait_till_fw_empty(adapter)) {
3690 con_log(CL_ANN, (KERN_NOTICE
3691 "megaraid mbox: LD delete, timed out\n"));
3692
3693 kioc->status = -ETIME;
3694
3695 scb->status = -1;
3696
3697 megaraid_mbox_mm_done(adapter, scb);
3698
3699 return (-ETIME);
3700 }
3701
3702 INIT_LIST_HEAD(&scb->list);
3703
3704 scb->state = SCB_ISSUED;
3705 if (mbox_post_cmd(adapter, scb) != 0) {
3706
3707 con_log(CL_ANN, (KERN_NOTICE
3708 "megaraid mbox: LD delete, mailbox busy\n"));
3709
3710 kioc->status = -EBUSY;
3711
3712 scb->status = -1;
3713
3714 megaraid_mbox_mm_done(adapter, scb);
3715
3716 return (-EBUSY);
3717 }
3718
3719 return 0;
3720 }
3721
3722 // put the command on the pending list and execute
3723 megaraid_mbox_runpendq(adapter, scb);
3724
3725 return 0;
3726}
3727
3728
3729static int
3730wait_till_fw_empty(adapter_t *adapter)
3731{
3732 unsigned long flags = 0;
3733 int i;
3734
3735
3736 /*
3737 * Set the quiescent flag to stop issuing cmds to FW.
3738 */
f2c8dc40 3739 spin_lock_irqsave(&adapter->lock, flags);
1da177e4 3740 adapter->quiescent++;
f2c8dc40 3741 spin_unlock_irqrestore(&adapter->lock, flags);
1da177e4
LT		 3742
3743 /*
3744 * Wait till there are no more cmds outstanding at FW. Try for at most
3745 * 60 seconds
3746 */
3747 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3748 con_log(CL_DLEVEL1, (KERN_INFO
3749 "megaraid: FW has %d pending commands\n",
3750 adapter->outstanding_cmds));
3751
3752 msleep(1000);
3753 }
3754
3755 return adapter->outstanding_cmds;
3756}
3757
3758
3759/**
3760 * megaraid_mbox_mm_done - callback for CMM commands
3761 * @adapter : HBA soft state
3762 * @scb : completed command
3763 *
3764 * Callback routine for internal commands originated from the management
3765 * module.
3766 */
3767static void
3768megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3769{
3770 uioc_t *kioc;
3771 mbox64_t *mbox64;
3772 uint8_t *raw_mbox;
3773 unsigned long flags;
3774
3775 kioc = (uioc_t *)scb->gp;
1da177e4
LT		 3776 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3777 mbox64->mbox32.status = scb->status;
3778 raw_mbox = (uint8_t *)&mbox64->mbox32;
3779
3780
3781 // put scb in the free pool
3782 scb->state = SCB_FREE;
3783 scb->scp = NULL;
3784
3785 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3786
3787 list_add(&scb->list, &adapter->uscb_pool);
3788
3789 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3790
3791 // if a delete logical drive operation succeeded, restart the
3792 // controller
3793 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3794
3795 adapter->quiescent--;
3796
3797 megaraid_mbox_runpendq(adapter, NULL);
3798 }
3799
3800 kioc->done(kioc);
3801
3802 return;
3803}
3804
3805
3806/**
3807 * gather_hbainfo - HBA characteristics for the applications
a69b74d3
RD		 3808 * @adapter : HBA soft state
3809 * @hinfo : pointer to the caller's host info strucuture
1da177e4
LT		 3810 */
3811static int
3812gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3813{
3814 uint8_t dmajor;
3815
3816 dmajor = megaraid_mbox_version[0];
3817
3818 hinfo->pci_vendor_id = adapter->pdev->vendor;
3819 hinfo->pci_device_id = adapter->pdev->device;
3820 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3821 hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3822
3823 hinfo->pci_bus = adapter->pdev->bus->number;
3824 hinfo->pci_dev_fn = adapter->pdev->devfn;
3825 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn);
3826 hinfo->irq = adapter->host->irq;
3827 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport;
3828
3829 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3830 hinfo->host_no = adapter->host->host_no;
3831
3832 return 0;
3833}
3834
3835/*
3836 * END: Interface for the common management module
3837 */
3838
3839
3840
3841/**
3842 * megaraid_sysfs_alloc_resources - allocate sysfs related resources
a69b74d3 3843 * @adapter : controller's soft state
1da177e4
LT		 3844 *
3845 * Allocate packets required to issue FW calls whenever the sysfs attributes
3846 * are read. These attributes would require up-to-date information from the
3847 * FW. Also set up resources for mutual exclusion to share these resources and
3848 * the wait queue.
3849 *
a69b74d3
RD		 3850 * Return 0 on success.
3851 * Return -ERROR_CODE on failure.
1da177e4
LT		 3852 */
3853static int
3854megaraid_sysfs_alloc_resources(adapter_t *adapter)
3855{
3856 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3857 int rval = 0;
3858
3859 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3860
3861 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3862
3863 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3864 PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3865
3866 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3867 !raid_dev->sysfs_buffer) {
3868
3869 con_log(CL_ANN, (KERN_WARNING
3870 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3871 __LINE__));
3872
3873 rval = -ENOMEM;
3874
3875 megaraid_sysfs_free_resources(adapter);
3876 }
3877
0c2cc433 3878 mutex_init(&raid_dev->sysfs_mtx);
1da177e4
LT		 3879
3880 init_waitqueue_head(&raid_dev->sysfs_wait_q);
3881
3882 return rval;
3883}
3884
3885
3886/**
3887 * megaraid_sysfs_free_resources - free sysfs related resources
a69b74d3 3888 * @adapter : controller's soft state
1da177e4
LT		 3889 *
3890 * Free packets allocated for sysfs FW commands
1da177e4
LT		 3891 */
3892static void
3893megaraid_sysfs_free_resources(adapter_t *adapter)
3894{
3895 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3896
c9475cb0
JJ		 3897 kfree(raid_dev->sysfs_uioc);
3898 kfree(raid_dev->sysfs_mbox64);
1da177e4
LT		 3899
3900 if (raid_dev->sysfs_buffer) {
3901 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3902 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3903 }
3904}
3905
3906
3907/**
3908 * megaraid_sysfs_get_ldmap_done - callback for get ldmap
a69b74d3 3909 * @uioc : completed packet
1da177e4
LT		 3910 *
3911 * Callback routine called in the ISR/tasklet context for get ldmap call
1da177e4
LT		 3912 */
3913static void
3914megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3915{
3916 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3917 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3918
3919 uioc->status = 0;
3920
3921 wake_up(&raid_dev->sysfs_wait_q);
3922}
3923
3924
3925/**
3926 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
a69b74d3 3927 * @data : timed out packet
1da177e4
LT		 3928 *
3929 * Timeout routine to recover and return to application, in case the adapter
a69b74d3
RD		 3930 * has stopped responding. A timeout of 60 seconds for this command seems like
3931 * a good value.
1da177e4
LT		 3932 */
3933static void
3934megaraid_sysfs_get_ldmap_timeout(unsigned long data)
3935{
3936 uioc_t *uioc = (uioc_t *)data;
3937 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3938 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3939
3940 uioc->status = -ETIME;
3941
3942 wake_up(&raid_dev->sysfs_wait_q);
3943}
3944
3945
3946/**
3947 * megaraid_sysfs_get_ldmap - get update logical drive map
a69b74d3 3948 * @adapter : controller's soft state
1da177e4
LT		 3949 *
3950 * This routine will be called whenever user reads the logical drive
3951 * attributes, go get the current logical drive mapping table from the
3952 * firmware. We use the managment API's to issue commands to the controller.
3953 *
3954 * NOTE: The commands issuance functionality is not generalized and
3955 * implemented in context of "get ld map" command only. If required, the
3956 * command issuance logical can be trivially pulled out and implemented as a
3957 * standalone libary. For now, this should suffice since there is no other
3958 * user of this interface.
3959 *
a69b74d3
RD		 3960 * Return 0 on success.
3961 * Return -1 on failure.
1da177e4
LT		 3962 */
3963static int
3964megaraid_sysfs_get_ldmap(adapter_t *adapter)
3965{
3966 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3967 uioc_t *uioc;
3968 mbox64_t *mbox64;
3969 mbox_t *mbox;
3970 char *raw_mbox;
3971 struct timer_list sysfs_timer;
3972 struct timer_list *timerp;
3973 caddr_t ldmap;
3974 int rval = 0;
3975
3976 /*
3977 * Allow only one read at a time to go through the sysfs attributes
3978 */
0c2cc433 3979 mutex_lock(&raid_dev->sysfs_mtx);
1da177e4
LT		 3980
3981 uioc = raid_dev->sysfs_uioc;
3982 mbox64 = raid_dev->sysfs_mbox64;
3983 ldmap = raid_dev->sysfs_buffer;
3984
3985 memset(uioc, 0, sizeof(uioc_t));
3986 memset(mbox64, 0, sizeof(mbox64_t));
3987 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
3988
3989 mbox = &mbox64->mbox32;
3990 raw_mbox = (char *)mbox;
3991 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64;
3992 uioc->buf_vaddr = (caddr_t)adapter;
3993 uioc->status = -ENODATA;
3994 uioc->done = megaraid_sysfs_get_ldmap_done;
3995
3996 /*
3997 * Prepare the mailbox packet to get the current logical drive mapping
3998 * table
3999 */
4000 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
4001
4002 raw_mbox[0] = FC_DEL_LOGDRV;
4003 raw_mbox[2] = OP_GET_LDID_MAP;
4004
4005 /*
4006 * Setup a timer to recover from a non-responding controller
4007 */
4008 timerp = &sysfs_timer;
4009 init_timer(timerp);
4010
4011 timerp->function = megaraid_sysfs_get_ldmap_timeout;
4012 timerp->data = (unsigned long)uioc;
4013 timerp->expires = jiffies + 60 * HZ;
4014
4015 add_timer(timerp);
4016
4017 /*
4018 * Send the command to the firmware
4019 */
4020 rval = megaraid_mbox_mm_command(adapter, uioc);
4021
4022 if (rval == 0) { // command successfully issued
4023 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4024
4025 /*
4026 * Check if the command timed out
4027 */
4028 if (uioc->status == -ETIME) {
4029 con_log(CL_ANN, (KERN_NOTICE
4030 "megaraid: sysfs get ld map timed out\n"));
4031
4032 rval = -ETIME;
4033 }
4034 else {
4035 rval = mbox->status;
4036 }
4037
4038 if (rval == 0) {
4039 memcpy(raid_dev->curr_ldmap, ldmap,
4040 sizeof(raid_dev->curr_ldmap));
4041 }
4042 else {
4043 con_log(CL_ANN, (KERN_NOTICE
4044 "megaraid: get ld map failed with %x\n", rval));
4045 }
4046 }
4047 else {
4048 con_log(CL_ANN, (KERN_NOTICE
4049 "megaraid: could not issue ldmap command:%x\n", rval));
4050 }
4051
4052
4053 del_timer_sync(timerp);
4054
0c2cc433 4055 mutex_unlock(&raid_dev->sysfs_mtx);
1da177e4
LT		 4056
4057 return rval;
4058}
4059
4060
4061/**
4062 * megaraid_sysfs_show_app_hndl - display application handle for this adapter
a69b74d3
RD		 4063 * @cdev : class device object representation for the host
4064 * @buf : buffer to send data to
1da177e4
LT		 4065 *
4066 * Display the handle used by the applications while executing management
4067 * tasks on the adapter. We invoke a management module API to get the adapter
4068 * handle, since we do not interface with applications directly.
1da177e4
LT		 4069 */
4070static ssize_t
4071megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf)
4072{
4073 struct Scsi_Host *shost = class_to_shost(cdev);
4074 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4075 uint32_t app_hndl;
4076
4077 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4078
4079 return snprintf(buf, 8, "%u\n", app_hndl);
4080}
4081
4082
4083/**
4084 * megaraid_sysfs_show_ldnum - display the logical drive number for this device
a69b74d3
RD		 4085 * @dev : device object representation for the scsi device
4086 * @attr : device attribute to show
4087 * @buf : buffer to send data to
1da177e4
LT		 4088 *
4089 * Display the logical drive number for the device in question, if it a valid
a69b74d3
RD		 4090 * logical drive. For physical devices, "-1" is returned.
4091 *
4092 * The logical drive number is displayed in following format:
1da177e4
LT		 4093 *
4094 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
1da177e4 4095 *
a69b74d3 4096 * <int> <int> <int> <int>
1da177e4
LT		 4097 */
4098static ssize_t
10523b3b 4099megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 4100{
4101 struct scsi_device *sdev = to_scsi_device(dev);
4102 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4103 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4104 int scsi_id = -1;
4105 int logical_drv = -1;
4106 int ldid_map = -1;
4107 uint32_t app_hndl = 0;
4108 int mapped_sdev_id;
4109 int rval;
4110 int i;
4111
4112 if (raid_dev->random_del_supported &&
4113 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4114
4115 rval = megaraid_sysfs_get_ldmap(adapter);
4116 if (rval == 0) {
4117
4118 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4119
4120 mapped_sdev_id = sdev->id;
4121
4122 if (sdev->id > adapter->init_id) {
4123 mapped_sdev_id -= 1;
4124 }
4125
4126 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4127
4128 scsi_id = sdev->id;
4129
4130 logical_drv = i;
4131
4132 ldid_map = raid_dev->curr_ldmap[i];
4133
4134 app_hndl = mraid_mm_adapter_app_handle(
4135 adapter->unique_id);
4136
4137 break;
4138 }
4139 }
4140 }
4141 else {
4142 con_log(CL_ANN, (KERN_NOTICE
4143 "megaraid: sysfs get ld map failed: %x\n",
4144 rval));
4145 }
4146 }
4147
4148 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4149 ldid_map, app_hndl);
4150}
4151
4152
4153/*
4154 * END: Mailbox Low Level Driver
4155 */
4156module_init(megaraid_init);
4157module_exit(megaraid_exit);
4158
4159/* vim: set ts=8 sw=8 tw=78 ai si: */
kernel source for telekom puls (alcatel/mediatek)