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[SCSI] libsas: fix sense_buffer overrun
[net-next-2.6.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 1586 sgl = scsi_sglist(scp);
45711f1a
JA		 1587 if (sg_page(sgl)) {
1588 vaddr = (caddr_t) sg_virt(&sgl[0]);
1da177e4 1589
32fbac22 1590 memset(vaddr, 0, scp->cmnd[4]);
1da177e4
LT		 1591 }
1592 else {
32fbac22
FT		 1593 con_log(CL_ANN, (KERN_WARNING
1594 "megaraid mailbox: invalid sg:%d\n",
1595 __LINE__));
1da177e4 1596 }
32fbac22
FT		 1597 }
1598 scp->result = (DID_OK << 16);
1599 return NULL;
1da177e4
LT		 1600
1601 case INQUIRY:
1602 /*
1603 * Display the channel scan for logical drives
1604 * Do not display scan for a channel if already done.
1605 */
1606 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1607
1608 con_log(CL_ANN, (KERN_INFO
1609 "scsi[%d]: scanning scsi channel %d",
1610 adapter->host->host_no,
1611 SCP2CHANNEL(scp)));
1612
1613 con_log(CL_ANN, (
1614 " [virtual] for logical drives\n"));
1615
1616 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1617 }
1618
aa677bc7
JS		 1619 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1620 scp->sense_buffer[0] = 0x70;
1621 scp->sense_buffer[2] = ILLEGAL_REQUEST;
1622 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB;
1623 scp->result = CHECK_CONDITION << 1;
1624 return NULL;
1625 }
1626
1da177e4
LT		 1627 /* Fall through */
1628
1629 case READ_CAPACITY:
1630 /*
1631 * Do not allow LUN > 0 for logical drives and
1632 * requests for more than 40 logical drives
1633 */
1634 if (SCP2LUN(scp)) {
1635 scp->result = (DID_BAD_TARGET << 16);
1636 return NULL;
1637 }
1638 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1639 scp->result = (DID_BAD_TARGET << 16);
1640 return NULL;
1641 }
1642
1643
1644 /* Allocate a SCB and initialize passthru */
1645 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1646 scp->result = (DID_ERROR << 16);
1647 *busy = 1;
1648 return NULL;
1649 }
1650
1651 ccb = (mbox_ccb_t *)scb->ccb;
1652 scb->dev_channel = 0xFF;
1653 scb->dev_target = target;
1654 pthru = ccb->pthru;
1655 mbox = ccb->mbox;
1656 mbox64 = ccb->mbox64;
1657
1658 pthru->timeout = 0;
1659 pthru->ars = 1;
1660 pthru->reqsenselen = 14;
1661 pthru->islogical = 1;
1662 pthru->logdrv = target;
1663 pthru->cdblen = scp->cmd_len;
1664 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1665
1666 mbox->cmd = MBOXCMD_PASSTHRU64;
1667 scb->dma_direction = scp->sc_data_direction;
1668
32fbac22 1669 pthru->dataxferlen = scsi_bufflen(scp);
1da177e4
LT		 1670 pthru->dataxferaddr = ccb->sgl_dma_h;
1671 pthru->numsge = megaraid_mbox_mksgl(adapter,
1672 scb);
1673
1674 mbox->xferaddr = 0xFFFFFFFF;
1675 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h;
1676 mbox64->xferaddr_hi = 0;
1677
1678 return scb;
1679
1680 case READ_6:
1681 case WRITE_6:
1682 case READ_10:
1683 case WRITE_10:
1684 case READ_12:
1685 case WRITE_12:
1686
1687 /*
1688 * Allocate a SCB and initialize mailbox
1689 */
1690 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1691 scp->result = (DID_ERROR << 16);
1692 *busy = 1;
1693 return NULL;
1694 }
1695 ccb = (mbox_ccb_t *)scb->ccb;
1696 scb->dev_channel = 0xFF;
1697 scb->dev_target = target;
1698 mbox = ccb->mbox;
1699 mbox64 = ccb->mbox64;
1700 mbox->logdrv = target;
1701
1702 /*
1703 * A little HACK: 2nd bit is zero for all scsi read
1704 * commands and is set for all scsi write commands
1705 */
1706 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64:
1707 MBOXCMD_LREAD64 ;
1708
1709 /*
1710 * 6-byte READ(0x08) or WRITE(0x0A) cdb
1711 */
1712 if (scp->cmd_len == 6) {
1713 mbox->numsectors = (uint32_t)scp->cmnd[4];
1714 mbox->lba =
1715 ((uint32_t)scp->cmnd[1] << 16) |
1716 ((uint32_t)scp->cmnd[2] << 8) |
1717 (uint32_t)scp->cmnd[3];
1718
1719 mbox->lba &= 0x1FFFFF;
1720 }
1721
1722 /*
1723 * 10-byte READ(0x28) or WRITE(0x2A) cdb
1724 */
1725 else if (scp->cmd_len == 10) {
1726 mbox->numsectors =
1727 (uint32_t)scp->cmnd[8] |
1728 ((uint32_t)scp->cmnd[7] << 8);
1729 mbox->lba =
1730 ((uint32_t)scp->cmnd[2] << 24) |
1731 ((uint32_t)scp->cmnd[3] << 16) |
1732 ((uint32_t)scp->cmnd[4] << 8) |
1733 (uint32_t)scp->cmnd[5];
1734 }
1735
1736 /*
1737 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1738 */
1739 else if (scp->cmd_len == 12) {
1740 mbox->lba =
1741 ((uint32_t)scp->cmnd[2] << 24) |
1742 ((uint32_t)scp->cmnd[3] << 16) |
1743 ((uint32_t)scp->cmnd[4] << 8) |
1744 (uint32_t)scp->cmnd[5];
1745
1746 mbox->numsectors =
1747 ((uint32_t)scp->cmnd[6] << 24) |
1748 ((uint32_t)scp->cmnd[7] << 16) |
1749 ((uint32_t)scp->cmnd[8] << 8) |
1750 (uint32_t)scp->cmnd[9];
1751 }
1752 else {
1753 con_log(CL_ANN, (KERN_WARNING
1754 "megaraid: unsupported CDB length\n"));
1755
1756 megaraid_dealloc_scb(adapter, scb);
1757
1758 scp->result = (DID_ERROR << 16);
1759 return NULL;
1760 }
1761
1762 scb->dma_direction = scp->sc_data_direction;
1763
1764 // Calculate Scatter-Gather info
1765 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h;
1766 mbox->numsge = megaraid_mbox_mksgl(adapter,
1767 scb);
1768 mbox->xferaddr = 0xFFFFFFFF;
1769 mbox64->xferaddr_hi = 0;
1770
1771 return scb;
1772
1773 case RESERVE:
1774 case RELEASE:
1775 /*
1776 * Do we support clustering and is the support enabled
1777 */
1778 if (!adapter->ha) {
1779 scp->result = (DID_BAD_TARGET << 16);
1780 return NULL;
1781 }
1782
1783 /*
1784 * Allocate a SCB and initialize mailbox
1785 */
1786 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1787 scp->result = (DID_ERROR << 16);
1788 *busy = 1;
1789 return NULL;
1790 }
1791
1792 ccb = (mbox_ccb_t *)scb->ccb;
1793 scb->dev_channel = 0xFF;
1794 scb->dev_target = target;
1795 ccb->raw_mbox[0] = CLUSTER_CMD;
1796 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ?
1797 RESERVE_LD : RELEASE_LD;
1798
1799 ccb->raw_mbox[3] = target;
1800 scb->dma_direction = scp->sc_data_direction;
1801
1802 return scb;
1803
1804 default:
1805 scp->result = (DID_BAD_TARGET << 16);
1806 return NULL;
1807 }
1808 }
1809 else { // Passthru device commands
1810
1811 // Do not allow access to target id > 15 or LUN > 7
1812 if (target > 15 || SCP2LUN(scp) > 7) {
1813 scp->result = (DID_BAD_TARGET << 16);
1814 return NULL;
1815 }
1816
1817 // if fast load option was set and scan for last device is
1818 // over, reset the fast_load flag so that during a possible
1819 // next scan, devices can be made available
1820 if (rdev->fast_load && (target == 15) &&
1821 (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1822
1823 con_log(CL_ANN, (KERN_INFO
1824 "megaraid[%d]: physical device scan re-enabled\n",
1825 adapter->host->host_no));
1826 rdev->fast_load = 0;
1827 }
1828
1829 /*
1830 * Display the channel scan for physical devices
1831 */
1832 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1833
1834 ss = rdev->fast_load ? skip : scan;
1835
1836 con_log(CL_ANN, (KERN_INFO
1837 "scsi[%d]: %s scsi channel %d [Phy %d]",
1838 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1839 channel));
1840
1841 con_log(CL_ANN, (
1842 " for non-raid devices\n"));
1843
1844 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1845 }
1846
1847 // disable channel sweep if fast load option given
1848 if (rdev->fast_load) {
1849 scp->result = (DID_BAD_TARGET << 16);
1850 return NULL;
1851 }
1852
1853 // Allocate a SCB and initialize passthru
1854 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1855 scp->result = (DID_ERROR << 16);
1856 *busy = 1;
1857 return NULL;
1858 }
1859
1860 ccb = (mbox_ccb_t *)scb->ccb;
1861 scb->dev_channel = channel;
1862 scb->dev_target = target;
1863 scb->dma_direction = scp->sc_data_direction;
1864 mbox = ccb->mbox;
1865 mbox64 = ccb->mbox64;
1866
1867 // Does this firmware support extended CDBs
1868 if (adapter->max_cdb_sz == 16) {
1869 mbox->cmd = MBOXCMD_EXTPTHRU;
1870
1871 megaraid_mbox_prepare_epthru(adapter, scb, scp);
1872
1873 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h;
1874 mbox64->xferaddr_hi = 0;
1875 mbox->xferaddr = 0xFFFFFFFF;
1876 }
1877 else {
1878 mbox->cmd = MBOXCMD_PASSTHRU64;
1879
1880 megaraid_mbox_prepare_pthru(adapter, scb, scp);
1881
1882 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h;
1883 mbox64->xferaddr_hi = 0;
1884 mbox->xferaddr = 0xFFFFFFFF;
1885 }
1886 return scb;
1887 }
1888
1889 // NOT REACHED
1890}
1891
1892
1893/**
1894 * megaraid_mbox_runpendq - execute commands queued in the pending queue
1895 * @adapter : controller's soft state
a69b74d3 1896 * @scb_q : SCB to be queued in the pending list
1da177e4 1897 *
a69b74d3 1898 * Scan the pending list for commands which are not yet issued and try to
1da177e4
LT		 1899 * post to the controller. The SCB can be a null pointer, which would indicate
1900 * no SCB to be queue, just try to execute the ones in the pending list.
1901 *
1902 * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1903 * out from the head of the pending list. If it is successfully issued, the
1904 * next SCB is at the head now.
1905 */
1906static void
1907megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1908{
1909 scb_t *scb;
1910 unsigned long flags;
1911
1912 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1913
1914 if (scb_q) {
1915 scb_q->state = SCB_PENDQ;
1916 list_add_tail(&scb_q->list, &adapter->pend_list);
1917 }
1918
1919 // if the adapter in not in quiescent mode, post the commands to FW
1920 if (adapter->quiescent) {
1921 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1922 return;
1923 }
1924
1925 while (!list_empty(&adapter->pend_list)) {
1926
1927 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1928
1929 scb = list_entry(adapter->pend_list.next, scb_t, list);
1930
1931 // remove the scb from the pending list and try to
1932 // issue. If we are unable to issue it, put back in
1933 // the pending list and return
1934
1935 list_del_init(&scb->list);
1936
1937 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1938
1939 // if mailbox was busy, return SCB back to pending
1940 // list. Make sure to add at the head, since that's
1941 // where it would have been removed from
1942
1943 scb->state = SCB_ISSUED;
1944
1945 if (mbox_post_cmd(adapter, scb) != 0) {
1946
1947 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1948
1949 scb->state = SCB_PENDQ;
1950
1951 list_add(&scb->list, &adapter->pend_list);
1952
1953 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1954 flags);
1955
1956 return;
1957 }
1958
1959 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1960 }
1961
1962 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1963
1964
1965 return;
1966}
1967
1968
1969/**
1970 * megaraid_mbox_prepare_pthru - prepare a command for physical devices
a69b74d3
RD		 1971 * @adapter : pointer to controller's soft state
1972 * @scb : scsi control block
1973 * @scp : scsi command from the mid-layer
1da177e4 1974 *
a69b74d3 1975 * Prepare a command for the scsi physical devices.
1da177e4
LT		 1976 */
1977static void
1978megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1979 struct scsi_cmnd *scp)
1980{
1981 mbox_ccb_t *ccb;
1982 mraid_passthru_t *pthru;
1983 uint8_t channel;
1984 uint8_t target;
1985
1986 ccb = (mbox_ccb_t *)scb->ccb;
1987 pthru = ccb->pthru;
1988 channel = scb->dev_channel;
1989 target = scb->dev_target;
1990
1991 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1992 pthru->timeout = 4;
1993 pthru->ars = 1;
1994 pthru->islogical = 0;
1995 pthru->channel = 0;
1996 pthru->target = (channel << 4) | target;
1997 pthru->logdrv = SCP2LUN(scp);
1998 pthru->reqsenselen = 14;
1999 pthru->cdblen = scp->cmd_len;
2000
2001 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2002
32fbac22
FT		 2003 if (scsi_bufflen(scp)) {
2004 pthru->dataxferlen = scsi_bufflen(scp);
1da177e4
LT		 2005 pthru->dataxferaddr = ccb->sgl_dma_h;
2006 pthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2007 }
2008 else {
2009 pthru->dataxferaddr = 0;
2010 pthru->dataxferlen = 0;
2011 pthru->numsge = 0;
2012 }
2013 return;
2014}
2015
2016
2017/**
2018 * megaraid_mbox_prepare_epthru - prepare a command for physical devices
a69b74d3
RD		 2019 * @adapter : pointer to controller's soft state
2020 * @scb : scsi control block
2021 * @scp : scsi command from the mid-layer
1da177e4 2022 *
a69b74d3
RD		 2023 * Prepare a command for the scsi physical devices. This rountine prepares
2024 * commands for devices which can take extended CDBs (>10 bytes).
1da177e4
LT		 2025 */
2026static void
2027megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2028 struct scsi_cmnd *scp)
2029{
2030 mbox_ccb_t *ccb;
2031 mraid_epassthru_t *epthru;
2032 uint8_t channel;
2033 uint8_t target;
2034
2035 ccb = (mbox_ccb_t *)scb->ccb;
2036 epthru = ccb->epthru;
2037 channel = scb->dev_channel;
2038 target = scb->dev_target;
2039
2040 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2041 epthru->timeout = 4;
2042 epthru->ars = 1;
2043 epthru->islogical = 0;
2044 epthru->channel = 0;
2045 epthru->target = (channel << 4) | target;
2046 epthru->logdrv = SCP2LUN(scp);
2047 epthru->reqsenselen = 14;
2048 epthru->cdblen = scp->cmd_len;
2049
2050 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2051
32fbac22
FT		 2052 if (scsi_bufflen(scp)) {
2053 epthru->dataxferlen = scsi_bufflen(scp);
1da177e4
LT		 2054 epthru->dataxferaddr = ccb->sgl_dma_h;
2055 epthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2056 }
2057 else {
2058 epthru->dataxferaddr = 0;
2059 epthru->dataxferlen = 0;
2060 epthru->numsge = 0;
2061 }
2062 return;
2063}
2064
2065
2066/**
2067 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
a69b74d3 2068 * @adapter : controller's soft state
1da177e4 2069 *
a69b74d3 2070 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
1da177e4
LT		 2071 * completed command and put them on the completed list for later processing.
2072 *
2073 * Returns: 1 if the interrupt is valid, 0 otherwise
2074 */
858119e1 2075static int
1da177e4
LT		 2076megaraid_ack_sequence(adapter_t *adapter)
2077{
2078 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2079 mbox_t *mbox;
2080 scb_t *scb;
2081 uint8_t nstatus;
2082 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS];
2083 struct list_head clist;
2084 int handled;
2085 uint32_t dword;
2086 unsigned long flags;
2087 int i, j;
2088
2089
2090 mbox = raid_dev->mbox;
2091
2092 // move the SCBs from the firmware completed array to our local list
2093 INIT_LIST_HEAD(&clist);
2094
2095 // loop till F/W has more commands for us to complete
2096 handled = 0;
2097 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2098 do {
2099 /*
2100 * Check if a valid interrupt is pending. If found, force the
2101 * interrupt line low.
2102 */
2103 dword = RDOUTDOOR(raid_dev);
2104 if (dword != 0x10001234) break;
2105
2106 handled = 1;
2107
2108 WROUTDOOR(raid_dev, 0x10001234);
2109
2110 nstatus = 0;
2111 // wait for valid numstatus to post
2112 for (i = 0; i < 0xFFFFF; i++) {
2113 if (mbox->numstatus != 0xFF) {
2114 nstatus = mbox->numstatus;
2115 break;
2116 }
2117 rmb();
2118 }
2119 mbox->numstatus = 0xFF;
2120
2121 adapter->outstanding_cmds -= nstatus;
2122
2123 for (i = 0; i < nstatus; i++) {
2124
2125 // wait for valid command index to post
2126 for (j = 0; j < 0xFFFFF; j++) {
2127 if (mbox->completed[i] != 0xFF) break;
2128 rmb();
2129 }
2130 completed[i] = mbox->completed[i];
2131 mbox->completed[i] = 0xFF;
2132
2133 if (completed[i] == 0xFF) {
2134 con_log(CL_ANN, (KERN_CRIT
2135 "megaraid: command posting timed out\n"));
2136
2137 BUG();
2138 continue;
2139 }
2140
2141 // Get SCB associated with this command id
2142 if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2143 // a cmm command
2144 scb = adapter->uscb_list + (completed[i] -
2145 MBOX_MAX_SCSI_CMDS);
2146 }
2147 else {
2148 // an os command
2149 scb = adapter->kscb_list + completed[i];
2150 }
2151
2152 scb->status = mbox->status;
2153 list_add_tail(&scb->list, &clist);
2154 }
2155
2156 // Acknowledge interrupt
2157 WRINDOOR(raid_dev, 0x02);
2158
2159 } while(1);
2160
2161 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2162
2163
2164 // put the completed commands in the completed list. DPC would
2165 // complete these commands later
2166 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2167
2168 list_splice(&clist, &adapter->completed_list);
2169
2170 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2171
2172
2173 // schedule the DPC if there is some work for it
2174 if (handled)
2175 tasklet_schedule(&adapter->dpc_h);
2176
2177 return handled;
2178}
2179
2180
2181/**
2182 * megaraid_isr - isr for memory based mailbox based controllers
a69b74d3
RD		 2183 * @irq : irq
2184 * @devp : pointer to our soft state
1da177e4
LT		 2185 *
2186 * Interrupt service routine for memory-mapped mailbox controllers.
2187 */
2188static irqreturn_t
7d12e780 2189megaraid_isr(int irq, void *devp)
1da177e4
LT		 2190{
2191 adapter_t *adapter = devp;
2192 int handled;
2193
2194 handled = megaraid_ack_sequence(adapter);
2195
2196 /* Loop through any pending requests */
2197 if (!adapter->quiescent) {
2198 megaraid_mbox_runpendq(adapter, NULL);
2199 }
2200
2201 return IRQ_RETVAL(handled);
2202}
2203
2204
2205/**
2206 * megaraid_mbox_sync_scb - sync kernel buffers
2207 * @adapter : controller's soft state
2208 * @scb : pointer to the resource packet
2209 *
2210 * DMA sync if required.
2211 */
858119e1 2212static void
1da177e4
LT		 2213megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2214{
2215 mbox_ccb_t *ccb;
2216
2217 ccb = (mbox_ccb_t *)scb->ccb;
2218
32fbac22
FT		 2219 if (scb->dma_direction == PCI_DMA_FROMDEVICE)
2220 pci_dma_sync_sg_for_cpu(adapter->pdev,
2221 scsi_sglist(scb->scp),
2222 scsi_sg_count(scb->scp),
1da177e4 2223 PCI_DMA_FROMDEVICE);
1da177e4 2224
32fbac22 2225 scsi_dma_unmap(scb->scp);
1da177e4
LT		 2226 return;
2227}
2228
2229
2230/**
2231 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2232 * @devp : pointer to HBA soft state
2233 *
2234 * Pick up the commands from the completed list and send back to the owners.
2235 * This is a reentrant function and does not assume any locks are held while
2236 * it is being called.
2237 */
2238static void
2239megaraid_mbox_dpc(unsigned long devp)
2240{
2241 adapter_t *adapter = (adapter_t *)devp;
2242 mraid_device_t *raid_dev;
2243 struct list_head clist;
2244 struct scatterlist *sgl;
2245 scb_t *scb;
2246 scb_t *tmp;
2247 struct scsi_cmnd *scp;
2248 mraid_passthru_t *pthru;
2249 mraid_epassthru_t *epthru;
2250 mbox_ccb_t *ccb;
2251 int islogical;
2252 int pdev_index;
2253 int pdev_state;
2254 mbox_t *mbox;
2255 unsigned long flags;
2256 uint8_t c;
2257 int status;
c005fb4f 2258 uioc_t *kioc;
1da177e4
LT		 2259
2260
2261 if (!adapter) return;
2262
2263 raid_dev = ADAP2RAIDDEV(adapter);
2264
2265 // move the SCBs from the completed list to our local list
2266 INIT_LIST_HEAD(&clist);
2267
2268 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2269
2270 list_splice_init(&adapter->completed_list, &clist);
2271
2272 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2273
2274
2275 list_for_each_entry_safe(scb, tmp, &clist, list) {
2276
2277 status = scb->status;
2278 scp = scb->scp;
2279 ccb = (mbox_ccb_t *)scb->ccb;
2280 pthru = ccb->pthru;
2281 epthru = ccb->epthru;
2282 mbox = ccb->mbox;
2283
2284 // Make sure f/w has completed a valid command
2285 if (scb->state != SCB_ISSUED) {
2286 con_log(CL_ANN, (KERN_CRIT
2287 "megaraid critical err: invalid command %d:%d:%p\n",
2288 scb->sno, scb->state, scp));
2289 BUG();
2290 continue; // Must never happen!
2291 }
2292
2293 // check for the management command and complete it right away
2294 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2295 scb->state = SCB_FREE;
2296 scb->status = status;
2297
2298 // remove from local clist
2299 list_del_init(&scb->list);
2300
c005fb4f
JS		 2301 kioc = (uioc_t *)scb->gp;
2302 kioc->status = 0;
2303
1da177e4
LT		 2304 megaraid_mbox_mm_done(adapter, scb);
2305
2306 continue;
2307 }
2308
2309 // Was an abort issued for this command earlier
2310 if (scb->state & SCB_ABORT) {
2311 con_log(CL_ANN, (KERN_NOTICE
2312 "megaraid: aborted cmd %lx[%x] completed\n",
2313 scp->serial_number, scb->sno));
2314 }
2315
2316 /*
2317 * If the inquiry came of a disk drive which is not part of
2318 * any RAID array, expose it to the kernel. For this to be
2319 * enabled, user must set the "megaraid_expose_unconf_disks"
2320 * flag to 1 by specifying it on module parameter list.
2321 * This would enable data migration off drives from other
2322 * configurations.
2323 */
2324 islogical = MRAID_IS_LOGICAL(adapter, scp);
2325 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2326 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2327
32fbac22 2328 sgl = scsi_sglist(scp);
45711f1a
JA		 2329 if (sg_page(sgl)) {
2330 c = *(unsigned char *) sg_virt(&sgl[0]);
32fbac22
FT		 2331 } else {
2332 con_log(CL_ANN, (KERN_WARNING
2333 "megaraid mailbox: invalid sg:%d\n",
2334 __LINE__));
2335 c = 0;
1da177e4
LT		 2336 }
2337
2338 if ((c & 0x1F ) == TYPE_DISK) {
2339 pdev_index = (scb->dev_channel * 16) +
2340 scb->dev_target;
2341 pdev_state =
2342 raid_dev->pdrv_state[pdev_index] & 0x0F;
2343
2344 if (pdev_state == PDRV_ONLINE ||
2345 pdev_state == PDRV_FAILED ||
2346 pdev_state == PDRV_RBLD ||
2347 pdev_state == PDRV_HOTSPARE ||
2348 megaraid_expose_unconf_disks == 0) {
2349
2350 status = 0xF0;
2351 }
2352 }
2353 }
2354
2355 // Convert MegaRAID status to Linux error code
2356 switch (status) {
2357
2358 case 0x00:
2359
2360 scp->result = (DID_OK << 16);
2361 break;
2362
2363 case 0x02:
2364
2365 /* set sense_buffer and result fields */
2366 if (mbox->cmd == MBOXCMD_PASSTHRU ||
2367 mbox->cmd == MBOXCMD_PASSTHRU64) {
2368
2369 memcpy(scp->sense_buffer, pthru->reqsensearea,
2370 14);
2371
2372 scp->result = DRIVER_SENSE << 24 |
2373 DID_OK << 16 | CHECK_CONDITION << 1;
2374 }
2375 else {
2376 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2377
2378 memcpy(scp->sense_buffer,
2379 epthru->reqsensearea, 14);
2380
2381 scp->result = DRIVER_SENSE << 24 |
2382 DID_OK << 16 |
2383 CHECK_CONDITION << 1;
2384 } else {
2385 scp->sense_buffer[0] = 0x70;
2386 scp->sense_buffer[2] = ABORTED_COMMAND;
2387 scp->result = CHECK_CONDITION << 1;
2388 }
2389 }
2390 break;
2391
2392 case 0x08:
2393
2394 scp->result = DID_BUS_BUSY << 16 | status;
2395 break;
2396
2397 default:
2398
2399 /*
2400 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2401 * failed
2402 */
2403 if (scp->cmnd[0] == TEST_UNIT_READY) {
2404 scp->result = DID_ERROR << 16 |
2405 RESERVATION_CONFLICT << 1;
2406 }
2407 else
2408 /*
2409 * Error code returned is 1 if Reserve or Release
2410 * failed or the input parameter is invalid
2411 */
2412 if (status == 1 && (scp->cmnd[0] == RESERVE ||
2413 scp->cmnd[0] == RELEASE)) {
2414
2415 scp->result = DID_ERROR << 16 |
2416 RESERVATION_CONFLICT << 1;
2417 }
2418 else {
2419 scp->result = DID_BAD_TARGET << 16 | status;
2420 }
2421 }
2422
2423 // print a debug message for all failed commands
2424 if (status) {
2425 megaraid_mbox_display_scb(adapter, scb);
2426 }
2427
2428 // Free our internal resources and call the mid-layer callback
2429 // routine
2430 megaraid_mbox_sync_scb(adapter, scb);
2431
2432 // remove from local clist
2433 list_del_init(&scb->list);
2434
2435 // put back in free list
2436 megaraid_dealloc_scb(adapter, scb);
2437
2438 // send the scsi packet back to kernel
1da177e4 2439 scp->scsi_done(scp);
1da177e4
LT		 2440 }
2441
2442 return;
2443}
2444
2445
2446/**
2447 * megaraid_abort_handler - abort the scsi command
2448 * @scp : command to be aborted
2449 *
2450 * Abort a previous SCSI request. Only commands on the pending list can be
2451 * aborted. All the commands issued to the F/W must complete.
2452 **/
2453static int
f2c8dc40 2454megaraid_abort_handler(struct scsi_cmnd *scp)
1da177e4
LT		 2455{
2456 adapter_t *adapter;
2457 mraid_device_t *raid_dev;
2458 scb_t *scb;
2459 scb_t *tmp;
2460 int found;
2461 unsigned long flags;
2462 int i;
2463
2464
2465 adapter = SCP2ADAPTER(scp);
2466 raid_dev = ADAP2RAIDDEV(adapter);
2467
1da177e4
LT		 2468 con_log(CL_ANN, (KERN_WARNING
2469 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2470 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2471 SCP2TARGET(scp), SCP2LUN(scp)));
2472
2473 // If FW has stopped responding, simply return failure
2474 if (raid_dev->hw_error) {
2475 con_log(CL_ANN, (KERN_NOTICE
2476 "megaraid: hw error, not aborting\n"));
2477 return FAILED;
2478 }
2479
2480 // There might a race here, where the command was completed by the
2481 // firmware and now it is on the completed list. Before we could
2482 // complete the command to the kernel in dpc, the abort came.
2483 // Find out if this is the case to avoid the race.
2484 scb = NULL;
2485 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2486 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2487
2488 if (scb->scp == scp) { // Found command
2489
2490 list_del_init(&scb->list); // from completed list
2491
2492 con_log(CL_ANN, (KERN_WARNING
2493 "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2494 scp->serial_number, scb->sno,
2495 scb->dev_channel, scb->dev_target));
2496
2497 scp->result = (DID_ABORT << 16);
2498 scp->scsi_done(scp);
2499
2500 megaraid_dealloc_scb(adapter, scb);
2501
2502 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2503 flags);
2504
2505 return SUCCESS;
2506 }
2507 }
2508 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2509
2510
2511 // Find out if this command is still on the pending list. If it is and
2512 // was never issued, abort and return success. If the command is owned
2513 // by the firmware, we must wait for it to complete by the FW.
2514 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2515 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2516
2517 if (scb->scp == scp) { // Found command
2518
2519 list_del_init(&scb->list); // from pending list
2520
2521 ASSERT(!(scb->state & SCB_ISSUED));
2522
2523 con_log(CL_ANN, (KERN_WARNING
2524 "megaraid abort: %ld[%d:%d], driver owner\n",
2525 scp->serial_number, scb->dev_channel,
2526 scb->dev_target));
2527
2528 scp->result = (DID_ABORT << 16);
2529 scp->scsi_done(scp);
2530
2531 megaraid_dealloc_scb(adapter, scb);
2532
2533 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2534 flags);
2535
2536 return SUCCESS;
2537 }
2538 }
2539 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2540
2541
2542 // Check do we even own this command, in which case this would be
2543 // owned by the firmware. The only way to locate the FW scb is to
2544 // traverse through the list of all SCB, since driver does not
2545 // maintain these SCBs on any list
2546 found = 0;
f2c8dc40 2547 spin_lock_irq(&adapter->lock);
1da177e4
LT		 2548 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2549 scb = adapter->kscb_list + i;
2550
2551 if (scb->scp == scp) {
2552
2553 found = 1;
2554
2555 if (!(scb->state & SCB_ISSUED)) {
2556 con_log(CL_ANN, (KERN_WARNING
2557 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2558 scp->serial_number, scb->sno, scb->dev_channel,
2559 scb->dev_target));
2560 BUG();
2561 }
2562 else {
2563 con_log(CL_ANN, (KERN_WARNING
2564 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2565 scp->serial_number, scb->sno, scb->dev_channel,
2566 scb->dev_target));
2567 }
2568 }
2569 }
f2c8dc40 2570 spin_unlock_irq(&adapter->lock);
1da177e4
LT		 2571
2572 if (!found) {
2573 con_log(CL_ANN, (KERN_WARNING
2574 "megaraid abort: scsi cmd:%ld, do now own\n",
2575 scp->serial_number));
2576
2577 // FIXME: Should there be a callback for this command?
2578 return SUCCESS;
2579 }
2580
2581 // We cannot actually abort a command owned by firmware, return
2582 // failure and wait for reset. In host reset handler, we will find out
2583 // if the HBA is still live
2584 return FAILED;
2585}
2586
1da177e4
LT		 2587/**
2588 * megaraid_reset_handler - device reset hadler for mailbox based driver
2589 * @scp : reference command
2590 *
2591 * Reset handler for the mailbox based controller. First try to find out if
2592 * the FW is still live, in which case the outstanding commands counter mut go
2593 * down to 0. If that happens, also issue the reservation reset command to
2594 * relinquish (possible) reservations on the logical drives connected to this
a69b74d3 2595 * host.
1da177e4
LT		 2596 **/
2597static int
f2c8dc40 2598megaraid_reset_handler(struct scsi_cmnd *scp)
1da177e4
LT		 2599{
2600 adapter_t *adapter;
2601 scb_t *scb;
2602 scb_t *tmp;
2603 mraid_device_t *raid_dev;
2604 unsigned long flags;
2605 uint8_t raw_mbox[sizeof(mbox_t)];
2606 int rval;
2607 int recovery_window;
2608 int recovering;
2609 int i;
c005fb4f 2610 uioc_t *kioc;
1da177e4
LT		 2611
2612 adapter = SCP2ADAPTER(scp);
2613 raid_dev = ADAP2RAIDDEV(adapter);
2614
1da177e4
LT		 2615 // return failure if adapter is not responding
2616 if (raid_dev->hw_error) {
2617 con_log(CL_ANN, (KERN_NOTICE
2618 "megaraid: hw error, cannot reset\n"));
2619 return FAILED;
2620 }
2621
2622
2623 // Under exceptional conditions, FW can take up to 3 minutes to
2624 // complete command processing. Wait for additional 2 minutes for the
2625 // pending commands counter to go down to 0. If it doesn't, let the
2626 // controller be marked offline
2627 // Also, reset all the commands currently owned by the driver
2628 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2629 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
1da177e4
LT		 2630 list_del_init(&scb->list); // from pending list
2631
c005fb4f
JS		 2632 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2633 con_log(CL_ANN, (KERN_WARNING
2634 "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2635 scb->sno, scb->dev_channel, scb->dev_target));
1da177e4 2636
c005fb4f 2637 scb->status = -1;
1da177e4 2638
c005fb4f
JS		 2639 kioc = (uioc_t *)scb->gp;
2640 kioc->status = -EFAULT;
2641
2642 megaraid_mbox_mm_done(adapter, scb);
2643 } else {
2644 if (scb->scp == scp) { // Found command
2645 con_log(CL_ANN, (KERN_WARNING
2646 "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2647 scp->serial_number, scb->sno,
2648 scb->dev_channel, scb->dev_target));
2649 } else {
2650 con_log(CL_ANN, (KERN_WARNING
2651 "megaraid: IO packet with %d[%d:%d] being reset\n",
2652 scb->sno, scb->dev_channel, scb->dev_target));
2653 }
2654
2655 scb->scp->result = (DID_RESET << 16);
2656 scb->scp->scsi_done(scb->scp);
2657
2658 megaraid_dealloc_scb(adapter, scb);
2659 }
1da177e4
LT		 2660 }
2661 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2662
2663 if (adapter->outstanding_cmds) {
2664 con_log(CL_ANN, (KERN_NOTICE
2665 "megaraid: %d outstanding commands. Max wait %d sec\n",
c005fb4f
JS		 2666 adapter->outstanding_cmds,
2667 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
1da177e4
LT		 2668 }
2669
1da177e4
LT		 2670 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2671
2672 recovering = adapter->outstanding_cmds;
2673
c005fb4f 2674 for (i = 0; i < recovery_window; i++) {
1da177e4
LT		 2675
2676 megaraid_ack_sequence(adapter);
2677
2678 // print a message once every 5 seconds only
2679 if (!(i % 5)) {
2680 con_log(CL_ANN, (
2681 "megaraid mbox: Wait for %d commands to complete:%d\n",
2682 adapter->outstanding_cmds,
c005fb4f 2683 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
1da177e4
LT		 2684 }
2685
2686 // bailout if no recovery happended in reset time
c005fb4f 2687 if (adapter->outstanding_cmds == 0) {
1da177e4
LT		 2688 break;
2689 }
2690
2691 msleep(1000);
2692 }
2693
f2c8dc40 2694 spin_lock(&adapter->lock);
1da177e4
LT		 2695
2696 // If still outstanding commands, bail out
2697 if (adapter->outstanding_cmds) {
2698 con_log(CL_ANN, (KERN_WARNING
2699 "megaraid mbox: critical hardware error!\n"));
2700
2701 raid_dev->hw_error = 1;
2702
f2c8dc40
CH		 2703 rval = FAILED;
2704 goto out;
1da177e4
LT		 2705 }
2706 else {
2707 con_log(CL_ANN, (KERN_NOTICE
2708 "megaraid mbox: reset sequence completed sucessfully\n"));
2709 }
2710
2711
2712 // If the controller supports clustering, reset reservations
f2c8dc40
CH		 2713 if (!adapter->ha) {
2714 rval = SUCCESS;
2715 goto out;
2716 }
1da177e4
LT		 2717
2718 // clear reservations if any
2719 raw_mbox[0] = CLUSTER_CMD;
2720 raw_mbox[2] = RESET_RESERVATIONS;
2721
2722 rval = SUCCESS;
2723 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2724 con_log(CL_ANN,
2725 (KERN_INFO "megaraid: reservation reset\n"));
2726 }
2727 else {
2728 rval = FAILED;
2729 con_log(CL_ANN, (KERN_WARNING
2730 "megaraid: reservation reset failed\n"));
2731 }
2732
f2c8dc40
CH		 2733 out:
2734 spin_unlock_irq(&adapter->lock);
1da177e4
LT		 2735 return rval;
2736}
2737
1da177e4
LT		 2738/*
2739 * START: internal commands library
2740 *
2741 * This section of the driver has the common routine used by the driver and
2742 * also has all the FW routines
2743 */
2744
2745/**
2746 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
a69b74d3
RD		 2747 * @adapter : controller's soft state
2748 * @raw_mbox : the mailbox
1da177e4
LT		 2749 *
2750 * Issue a scb in synchronous and non-interrupt mode for mailbox based
a69b74d3 2751 * controllers.
1da177e4
LT		 2752 */
2753static int
2754mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2755{
2756 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2757 mbox64_t *mbox64;
2758 mbox_t *mbox;
2759 uint8_t status;
2760 int i;
2761
2762
2763 mbox64 = raid_dev->mbox64;
2764 mbox = raid_dev->mbox;
2765
2766 /*
2767 * Wait until mailbox is free
2768 */
2769 if (megaraid_busywait_mbox(raid_dev) != 0)
2770 goto blocked_mailbox;
2771
2772 /*
2773 * Copy mailbox data into host structure
2774 */
2775 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2776 mbox->cmdid = 0xFE;
2777 mbox->busy = 1;
2778 mbox->poll = 0;
2779 mbox->ack = 0;
2780 mbox->numstatus = 0xFF;
2781 mbox->status = 0xFF;
2782
2783 wmb();
2784 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2785
2786 // wait for maximum 1 second for status to post. If the status is not
2787 // available within 1 second, assume FW is initializing and wait
2788 // for an extended amount of time
2789 if (mbox->numstatus == 0xFF) { // status not yet available
53b3531b 2790 udelay(25);
1da177e4
LT		 2791
2792 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2793 rmb();
2794 msleep(1);
2795 }
2796
2797
2798 if (i == 1000) {
2799 con_log(CL_ANN, (KERN_NOTICE
2800 "megaraid mailbox: wait for FW to boot "));
2801
2802 for (i = 0; (mbox->numstatus == 0xFF) &&
2803 (i < MBOX_RESET_WAIT); i++) {
2804 rmb();
2805 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2806 MBOX_RESET_WAIT - i));
2807 msleep(1000);
2808 }
2809
2810 if (i == MBOX_RESET_WAIT) {
2811
2812 con_log(CL_ANN, (
2813 "\nmegaraid mailbox: status not available\n"));
2814
2815 return -1;
2816 }
2817 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2818 }
2819 }
2820
2821 // wait for maximum 1 second for poll semaphore
2822 if (mbox->poll != 0x77) {
2823 udelay(25);
2824
2825 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2826 rmb();
2827 msleep(1);
2828 }
2829
2830 if (i == 1000) {
2831 con_log(CL_ANN, (KERN_WARNING
2832 "megaraid mailbox: could not get poll semaphore\n"));
2833 return -1;
2834 }
2835 }
2836
2837 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2838 wmb();
2839
2840 // wait for maximum 1 second for acknowledgement
2841 if (RDINDOOR(raid_dev) & 0x2) {
2842 udelay(25);
2843
2844 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2845 rmb();
2846 msleep(1);
2847 }
2848
2849 if (i == 1000) {
2850 con_log(CL_ANN, (KERN_WARNING
2851 "megaraid mailbox: could not acknowledge\n"));
2852 return -1;
2853 }
2854 }
2855 mbox->poll = 0;
2856 mbox->ack = 0x77;
2857
2858 status = mbox->status;
2859
2860 // invalidate the completed command id array. After command
2861 // completion, firmware would write the valid id.
2862 mbox->numstatus = 0xFF;
2863 mbox->status = 0xFF;
2864 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2865 mbox->completed[i] = 0xFF;
2866 }
2867
2868 return status;
2869
2870blocked_mailbox:
2871
2872 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2873 return -1;
2874}
2875
2876
2877/**
2878 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
a69b74d3
RD		 2879 * @adapter : controller's soft state
2880 * @raw_mbox : the mailbox
1da177e4
LT		 2881 *
2882 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2883 * controllers. This is a faster version of the synchronous command and
a69b74d3 2884 * therefore can be called in interrupt-context as well.
1da177e4
LT		 2885 */
2886static int
2887mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2888{
2889 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2890 mbox_t *mbox;
2891 long i;
2892
2893
2894 mbox = raid_dev->mbox;
2895
2896 // return immediately if the mailbox is busy
2897 if (mbox->busy) return -1;
2898
2899 // Copy mailbox data into host structure
2900 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2901 mbox->cmdid = 0xFE;
2902 mbox->busy = 1;
2903 mbox->poll = 0;
2904 mbox->ack = 0;
2905 mbox->numstatus = 0xFF;
2906 mbox->status = 0xFF;
2907
2908 wmb();
2909 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2910
c005fb4f 2911 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
1da177e4 2912 if (mbox->numstatus != 0xFF) break;
ed7e8ef7 2913 rmb();
c005fb4f 2914 udelay(MBOX_SYNC_DELAY_200);
1da177e4
LT		 2915 }
2916
c005fb4f 2917 if (i == MBOX_SYNC_WAIT_CNT) {
1da177e4
LT		 2918 // We may need to re-calibrate the counter
2919 con_log(CL_ANN, (KERN_CRIT
2920 "megaraid: fast sync command timed out\n"));
2921 }
2922
2923 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2924 wmb();
2925
2926 return mbox->status;
2927}
2928
2929
2930/**
2931 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
a69b74d3 2932 * @raid_dev : RAID device (HBA) soft state
1da177e4 2933 *
a69b74d3
RD		 2934 * Wait until the controller's mailbox is available to accept more commands.
2935 * Wait for at most 1 second.
1da177e4
LT		 2936 */
2937static int
2938megaraid_busywait_mbox(mraid_device_t *raid_dev)
2939{
2940 mbox_t *mbox = raid_dev->mbox;
2941 int i = 0;
2942
2943 if (mbox->busy) {
2944 udelay(25);
2945 for (i = 0; mbox->busy && i < 1000; i++)
2946 msleep(1);
2947 }
2948
2949 if (i < 1000) return 0;
2950 else return -1;
2951}
2952
2953
2954/**
2955 * megaraid_mbox_product_info - some static information about the controller
a69b74d3 2956 * @adapter : our soft state
1da177e4 2957 *
a69b74d3 2958 * Issue commands to the controller to grab some parameters required by our
1da177e4
LT		 2959 * caller.
2960 */
2961static int
2962megaraid_mbox_product_info(adapter_t *adapter)
2963{
2964 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2965 mbox_t *mbox;
2966 uint8_t raw_mbox[sizeof(mbox_t)];
2967 mraid_pinfo_t *pinfo;
2968 dma_addr_t pinfo_dma_h;
2969 mraid_inquiry3_t *mraid_inq3;
2970 int i;
2971
2972
2973 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2974 mbox = (mbox_t *)raw_mbox;
2975
2976 /*
2977 * Issue an ENQUIRY3 command to find out certain adapter parameters,
2978 * e.g., max channels, max commands etc.
2979 */
2980 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
2981 &pinfo_dma_h);
2982
2983 if (pinfo == NULL) {
2984 con_log(CL_ANN, (KERN_WARNING
2985 "megaraid: out of memory, %s %d\n", __FUNCTION__,
2986 __LINE__));
2987
2988 return -1;
2989 }
2990 memset(pinfo, 0, sizeof(mraid_pinfo_t));
2991
2992 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
2993 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
2994
2995 raw_mbox[0] = FC_NEW_CONFIG;
2996 raw_mbox[2] = NC_SUBOP_ENQUIRY3;
2997 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
2998
2999 // Issue the command
3000 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3001
3002 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3003
3004 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3005 pinfo, pinfo_dma_h);
3006
3007 return -1;
3008 }
3009
3010 /*
3011 * Collect information about state of each physical drive
3012 * attached to the controller. We will expose all the disks
3013 * which are not part of RAID
3014 */
3015 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3016 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3017 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3018 }
3019
3020 /*
3021 * Get product info for information like number of channels,
3022 * maximum commands supported.
3023 */
3024 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3025 mbox->xferaddr = (uint32_t)pinfo_dma_h;
3026
3027 raw_mbox[0] = FC_NEW_CONFIG;
3028 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3029
3030 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3031
3032 con_log(CL_ANN, (KERN_WARNING
3033 "megaraid: product info failed\n"));
3034
3035 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3036 pinfo, pinfo_dma_h);
3037
3038 return -1;
3039 }
3040
3041 /*
3042 * Setup some parameters for host, as required by our caller
3043 */
3044 adapter->max_channel = pinfo->nchannels;
3045
3046 /*
3047 * we will export all the logical drives on a single channel.
3048 * Add 1 since inquires do not come for inititor ID
3049 */
3050 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1;
3051 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices
3052
3053 /*
3054 * These are the maximum outstanding commands for the scsi-layer
3055 */
3056 adapter->max_cmds = MBOX_MAX_SCSI_CMDS;
3057
3058 memset(adapter->fw_version, 0, VERSION_SIZE);
3059 memset(adapter->bios_version, 0, VERSION_SIZE);
3060
3061 memcpy(adapter->fw_version, pinfo->fw_version, 4);
3062 adapter->fw_version[4] = 0;
3063
3064 memcpy(adapter->bios_version, pinfo->bios_version, 4);
3065 adapter->bios_version[4] = 0;
3066
3067 con_log(CL_ANN, (KERN_NOTICE
3068 "megaraid: fw version:[%s] bios version:[%s]\n",
3069 adapter->fw_version, adapter->bios_version));
3070
3071 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3072 pinfo_dma_h);
3073
3074 return 0;
3075}
3076
3077
3078
3079/**
3080 * megaraid_mbox_extended_cdb - check for support for extended CDBs
a69b74d3 3081 * @adapter : soft state for the controller
1da177e4 3082 *
a69b74d3
RD		 3083 * This routine check whether the controller in question supports extended
3084 * ( > 10 bytes ) CDBs.
1da177e4
LT		 3085 */
3086static int
3087megaraid_mbox_extended_cdb(adapter_t *adapter)
3088{
3089 mbox_t *mbox;
3090 uint8_t raw_mbox[sizeof(mbox_t)];
3091 int rval;
3092
3093 mbox = (mbox_t *)raw_mbox;
3094
3095 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3096 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3097
3098 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3099
3100 raw_mbox[0] = MAIN_MISC_OPCODE;
3101 raw_mbox[2] = SUPPORT_EXT_CDB;
3102
3103 /*
3104 * Issue the command
3105 */
3106 rval = 0;
3107 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3108 rval = -1;
3109 }
3110
3111 return rval;
3112}
3113
3114
3115/**
3116 * megaraid_mbox_support_ha - Do we support clustering
a69b74d3
RD		 3117 * @adapter : soft state for the controller
3118 * @init_id : ID of the initiator
1da177e4
LT		 3119 *
3120 * Determine if the firmware supports clustering and the ID of the initiator.
3121 */
3122static int
3123megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3124{
3125 mbox_t *mbox;
3126 uint8_t raw_mbox[sizeof(mbox_t)];
3127 int rval;
3128
3129
3130 mbox = (mbox_t *)raw_mbox;
3131
3132 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3133
3134 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3135
3136 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3137
3138 raw_mbox[0] = GET_TARGET_ID;
3139
3140 // Issue the command
3141 *init_id = 7;
3142 rval = -1;
3143 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3144
3145 *init_id = *(uint8_t *)adapter->ibuf;
3146
3147 con_log(CL_ANN, (KERN_INFO
3148 "megaraid: cluster firmware, initiator ID: %d\n",
3149 *init_id));
3150
3151 rval = 0;
3152 }
3153
3154 return rval;
3155}
3156
3157
3158/**
3159 * megaraid_mbox_support_random_del - Do we support random deletion
a69b74d3 3160 * @adapter : soft state for the controller
1da177e4 3161 *
a69b74d3 3162 * Determine if the firmware supports random deletion.
1da177e4
LT		 3163 * Return: 1 is operation supported, 0 otherwise
3164 */
3165static int
3166megaraid_mbox_support_random_del(adapter_t *adapter)
3167{
3168 mbox_t *mbox;
3169 uint8_t raw_mbox[sizeof(mbox_t)];
3170 int rval;
3171
3172
3173 mbox = (mbox_t *)raw_mbox;
3174
3175 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3176
3177 raw_mbox[0] = FC_DEL_LOGDRV;
3178 raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3179
3180 // Issue the command
3181 rval = 0;
3182 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3183
3184 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3185
3186 rval = 1;
3187 }
3188
3189 return rval;
3190}
3191
3192
3193/**
3194 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
a69b74d3 3195 * @adapter : soft state for the controller
1da177e4
LT		 3196 *
3197 * Find out the maximum number of scatter-gather elements supported by the
a69b74d3 3198 * firmware.
1da177e4
LT		 3199 */
3200static int
3201megaraid_mbox_get_max_sg(adapter_t *adapter)
3202{
3203 mbox_t *mbox;
3204 uint8_t raw_mbox[sizeof(mbox_t)];
3205 int nsg;
3206
3207
3208 mbox = (mbox_t *)raw_mbox;
3209
3210 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3211
3212 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3213
3214 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3215
3216 raw_mbox[0] = MAIN_MISC_OPCODE;
3217 raw_mbox[2] = GET_MAX_SG_SUPPORT;
3218
3219 // Issue the command
3220 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3221 nsg = *(uint8_t *)adapter->ibuf;
3222 }
3223 else {
3224 nsg = MBOX_DEFAULT_SG_SIZE;
3225 }
3226
3227 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3228
3229 return nsg;
3230}
3231
3232
3233/**
3234 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
a69b74d3 3235 * @adapter : soft state for the controller
1da177e4 3236 *
a69b74d3
RD		 3237 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3238 * can be exported as regular SCSI channels.
1da177e4
LT		 3239 */
3240static void
3241megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3242{
3243 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3244 mbox_t *mbox;
3245 uint8_t raw_mbox[sizeof(mbox_t)];
3246
3247
3248 mbox = (mbox_t *)raw_mbox;
3249
3250 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3251
3252 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3253
3254 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3255
3256 raw_mbox[0] = CHNL_CLASS;
3257 raw_mbox[2] = GET_CHNL_CLASS;
3258
3259 // Issue the command. If the command fails, all channels are RAID
3260 // channels
3261 raid_dev->channel_class = 0xFF;
3262 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3263 raid_dev->channel_class = *(uint8_t *)adapter->ibuf;
3264 }
3265
3266 return;
3267}
3268
3269
3270/**
3271 * megaraid_mbox_flush_cache - flush adapter and disks cache
a69b74d3 3272 * @adapter : soft state for the controller
1da177e4 3273 *
a69b74d3 3274 * Flush adapter cache followed by disks cache.
1da177e4
LT		 3275 */
3276static void
3277megaraid_mbox_flush_cache(adapter_t *adapter)
3278{
3279 mbox_t *mbox;
3280 uint8_t raw_mbox[sizeof(mbox_t)];
3281
3282
3283 mbox = (mbox_t *)raw_mbox;
3284
3285 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3286
3287 raw_mbox[0] = FLUSH_ADAPTER;
3288
3289 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3290 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3291 }
3292
3293 raw_mbox[0] = FLUSH_SYSTEM;
3294
3295 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3296 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3297 }
3298
3299 return;
3300}
3301
3302
cd96d96f
SP		 3303/**
3304 * megaraid_mbox_fire_sync_cmd - fire the sync cmd
a69b74d3 3305 * @adapter : soft state for the controller
cd96d96f 3306 *
a69b74d3 3307 * Clears the pending cmds in FW and reinits its RAID structs.
cd96d96f
SP		 3308 */
3309static int
3310megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3311{
3312 mbox_t *mbox;
3313 uint8_t raw_mbox[sizeof(mbox_t)];
3314 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3315 mbox64_t *mbox64;
3316 int status = 0;
3317 int i;
3318 uint32_t dword;
3319
3320 mbox = (mbox_t *)raw_mbox;
3321
3322 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3323
3324 raw_mbox[0] = 0xFF;
3325
3326 mbox64 = raid_dev->mbox64;
3327 mbox = raid_dev->mbox;
3328
3329 /* Wait until mailbox is free */
3330 if (megaraid_busywait_mbox(raid_dev) != 0) {
3331 status = 1;
3332 goto blocked_mailbox;
3333 }
3334
3335 /* Copy mailbox data into host structure */
3336 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3337 mbox->cmdid = 0xFE;
3338 mbox->busy = 1;
3339 mbox->poll = 0;
3340 mbox->ack = 0;
3341 mbox->numstatus = 0;
3342 mbox->status = 0;
3343
3344 wmb();
3345 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3346
3347 /* Wait for maximum 1 min for status to post.
3348 * If the Firmware SUPPORTS the ABOVE COMMAND,
3349 * mbox->cmd will be set to 0
3350 * else
3351 * the firmware will reject the command with
3352 * mbox->numstatus set to 1
3353 */
3354
3355 i = 0;
3356 status = 0;
3357 while (!mbox->numstatus && mbox->cmd == 0xFF) {
3358 rmb();
3359 msleep(1);
3360 i++;
3361 if (i > 1000 * 60) {
3362 status = 1;
3363 break;
3364 }
3365 }
3366 if (mbox->numstatus == 1)
3367 status = 1; /*cmd not supported*/
3368
3369 /* Check for interrupt line */
3370 dword = RDOUTDOOR(raid_dev);
3371 WROUTDOOR(raid_dev, dword);
3372 WRINDOOR(raid_dev,2);
3373
3374 return status;
3375
3376blocked_mailbox:
3377 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3378 return status;
3379}
3380
1da177e4
LT		 3381/**
3382 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
a69b74d3
RD		 3383 * @adapter : controller's soft state
3384 * @scb : SCB to be displayed
3385 * @level : debug level for console print
1da177e4
LT		 3386 *
3387 * Diplay information about the given SCB iff the current debug level is
a69b74d3 3388 * verbose.
1da177e4
LT		 3389 */
3390static void
3391megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3392{
3393 mbox_ccb_t *ccb;
3394 struct scsi_cmnd *scp;
3395 mbox_t *mbox;
3396 int level;
3397 int i;
3398
3399
3400 ccb = (mbox_ccb_t *)scb->ccb;
3401 scp = scb->scp;
3402 mbox = ccb->mbox;
3403
3404 level = CL_DLEVEL3;
3405
3406 con_log(level, (KERN_NOTICE
3407 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3408 mbox->cmd, scb->sno));
3409
3410 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3411 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3412 mbox->numsge));
3413
3414 if (!scp) return;
3415
3416 con_log(level, (KERN_NOTICE "scsi cmnd: "));
3417
3418 for (i = 0; i < scp->cmd_len; i++) {
3419 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3420 }
3421
3422 con_log(level, ("\n"));
3423
3424 return;
3425}
3426
3427
3428/**
3429 * megaraid_mbox_setup_device_map - manage device ids
3430 * @adapter : Driver's soft state
3431 *
3432 * Manange the device ids to have an appropraite mapping between the kernel
3433 * scsi addresses and megaraid scsi and logical drive addresses. We export
3434 * scsi devices on their actual addresses, whereas the logical drives are
3435 * exported on a virtual scsi channel.
a69b74d3 3436 */
1da177e4
LT		 3437static void
3438megaraid_mbox_setup_device_map(adapter_t *adapter)
3439{
3440 uint8_t c;
3441 uint8_t t;
3442
3443 /*
3444 * First fill the values on the logical drive channel
3445 */
3446 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3447 adapter->device_ids[adapter->max_channel][t] =
3448 (t < adapter->init_id) ? t : t - 1;
3449
3450 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3451
3452 /*
3453 * Fill the values on the physical devices channels
3454 */
3455 for (c = 0; c < adapter->max_channel; c++)
3456 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3457 adapter->device_ids[c][t] = (c << 8) | t;
3458}
3459
3460
3461/*
3462 * END: internal commands library
3463 */
3464
3465/*
3466 * START: Interface for the common management module
3467 *
3468 * This is the module, which interfaces with the common mangement module to
3469 * provide support for ioctl and sysfs
3470 */
3471
3472/**
3473 * megaraid_cmm_register - register with the mangement module
a69b74d3 3474 * @adapter : HBA soft state
1da177e4
LT		 3475 *
3476 * Register with the management module, which allows applications to issue
3477 * ioctl calls to the drivers. This interface is used by the management module
3478 * to setup sysfs support as well.
3479 */
3480static int
3481megaraid_cmm_register(adapter_t *adapter)
3482{
3483 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3484 mraid_mmadp_t adp;
3485 scb_t *scb;
3486 mbox_ccb_t *ccb;
3487 int rval;
3488 int i;
3489
3490 // Allocate memory for the base list of scb for management module.
dd00cc48 3491 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL);
1da177e4
LT		 3492
3493 if (adapter->uscb_list == NULL) {
3494 con_log(CL_ANN, (KERN_WARNING
3495 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3496 __LINE__));
3497 return -1;
3498 }
1da177e4
LT		 3499
3500
3501 // Initialize the synchronization parameters for resources for
3502 // commands for management module
3503 INIT_LIST_HEAD(&adapter->uscb_pool);
3504
3505 spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3506
3507
3508
3509 // link all the packets. Note, CCB for commands, coming from the
3510 // commom management module, mailbox physical address are already
3511 // setup by it. We just need placeholder for that in our local command
3512 // control blocks
3513 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3514
3515 scb = adapter->uscb_list + i;
3516 ccb = raid_dev->uccb_list + i;
3517
3518 scb->ccb = (caddr_t)ccb;
3519 ccb->mbox64 = raid_dev->umbox64 + i;
3520 ccb->mbox = &ccb->mbox64->mbox32;
3521 ccb->raw_mbox = (uint8_t *)ccb->mbox;
3522
3523 scb->gp = 0;
3524
3525 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3526 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3527 scb->sno = i + MBOX_MAX_SCSI_CMDS;
3528
3529 scb->scp = NULL;
3530 scb->state = SCB_FREE;
3531 scb->dma_direction = PCI_DMA_NONE;
3532 scb->dma_type = MRAID_DMA_NONE;
3533 scb->dev_channel = -1;
3534 scb->dev_target = -1;
3535
3536 // put scb in the free pool
3537 list_add_tail(&scb->list, &adapter->uscb_pool);
3538 }
3539
3540 adp.unique_id = adapter->unique_id;
3541 adp.drvr_type = DRVRTYPE_MBOX;
3542 adp.drvr_data = (unsigned long)adapter;
3543 adp.pdev = adapter->pdev;
3544 adp.issue_uioc = megaraid_mbox_mm_handler;
c005fb4f 3545 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
1da177e4
LT		 3546 adp.max_kioc = MBOX_MAX_USER_CMDS;
3547
3548 if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3549
3550 con_log(CL_ANN, (KERN_WARNING
3551 "megaraid mbox: did not register with CMM\n"));
3552
3553 kfree(adapter->uscb_list);
3554 }
3555
3556 return rval;
3557}
3558
3559
3560/**
3561 * megaraid_cmm_unregister - un-register with the mangement module
a69b74d3 3562 * @adapter : HBA soft state
1da177e4
LT		 3563 *
3564 * Un-register with the management module.
3565 * FIXME: mgmt module must return failure for unregister if it has pending
a69b74d3 3566 * commands in LLD.
1da177e4
LT		 3567 */
3568static int
3569megaraid_cmm_unregister(adapter_t *adapter)
3570{
3571 kfree(adapter->uscb_list);
3572 mraid_mm_unregister_adp(adapter->unique_id);
3573 return 0;
3574}
3575
3576
3577/**
3578 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
a69b74d3
RD		 3579 * @drvr_data : LLD specific data
3580 * @kioc : CMM interface packet
3581 * @action : command action
1da177e4
LT		 3582 *
3583 * This routine is invoked whenever the Common Mangement Module (CMM) has a
3584 * command for us. The 'action' parameter specifies if this is a new command
3585 * or otherwise.
3586 */
3587static int
3588megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3589{
3590 adapter_t *adapter;
3591
3592 if (action != IOCTL_ISSUE) {
3593 con_log(CL_ANN, (KERN_WARNING
3594 "megaraid: unsupported management action:%#2x\n",
3595 action));
3596 return (-ENOTSUPP);
3597 }
3598
3599 adapter = (adapter_t *)drvr_data;
3600
3601 // make sure this adapter is not being detached right now.
3602 if (atomic_read(&adapter->being_detached)) {
3603 con_log(CL_ANN, (KERN_WARNING
3604 "megaraid: reject management request, detaching\n"));
3605 return (-ENODEV);
3606 }
3607
3608 switch (kioc->opcode) {
3609
3610 case GET_ADAP_INFO:
3611
3612 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *)
3613 (unsigned long)kioc->buf_vaddr);
3614
3615 kioc->done(kioc);
3616
3617 return kioc->status;
3618
3619 case MBOX_CMD:
3620
3621 return megaraid_mbox_mm_command(adapter, kioc);
3622
3623 default:
3624 kioc->status = (-EINVAL);
3625 kioc->done(kioc);
3626 return (-EINVAL);
3627 }
3628
3629 return 0; // not reached
3630}
3631
3632/**
3633 * megaraid_mbox_mm_command - issues commands routed through CMM
a69b74d3
RD		 3634 * @adapter : HBA soft state
3635 * @kioc : management command packet
1da177e4
LT		 3636 *
3637 * Issues commands, which are routed through the management module.
3638 */
3639static int
3640megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3641{
3642 struct list_head *head = &adapter->uscb_pool;
3643 mbox64_t *mbox64;
3644 uint8_t *raw_mbox;
3645 scb_t *scb;
3646 mbox_ccb_t *ccb;
3647 unsigned long flags;
3648
3649 // detach one scb from free pool
3650 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3651
3652 if (list_empty(head)) { // should never happen because of CMM
3653
3654 con_log(CL_ANN, (KERN_WARNING
3655 "megaraid mbox: bug in cmm handler, lost resources\n"));
3656
3657 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3658
3659 return (-EINVAL);
3660 }
3661
3662 scb = list_entry(head->next, scb_t, list);
3663 list_del_init(&scb->list);
3664
3665 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3666
3667 scb->state = SCB_ACTIVE;
3668 scb->dma_type = MRAID_DMA_NONE;
3669 scb->dma_direction = PCI_DMA_NONE;
3670
3671 ccb = (mbox_ccb_t *)scb->ccb;
3672 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3673 raw_mbox = (uint8_t *)&mbox64->mbox32;
3674
3675 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3676
3677 scb->gp = (unsigned long)kioc;
3678
3679 /*
3680 * If it is a logdrv random delete operation, we have to wait till
3681 * there are no outstanding cmds at the fw and then issue it directly
3682 */
3683 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3684
3685 if (wait_till_fw_empty(adapter)) {
3686 con_log(CL_ANN, (KERN_NOTICE
3687 "megaraid mbox: LD delete, timed out\n"));
3688
3689 kioc->status = -ETIME;
3690
3691 scb->status = -1;
3692
3693 megaraid_mbox_mm_done(adapter, scb);
3694
3695 return (-ETIME);
3696 }
3697
3698 INIT_LIST_HEAD(&scb->list);
3699
3700 scb->state = SCB_ISSUED;
3701 if (mbox_post_cmd(adapter, scb) != 0) {
3702
3703 con_log(CL_ANN, (KERN_NOTICE
3704 "megaraid mbox: LD delete, mailbox busy\n"));
3705
3706 kioc->status = -EBUSY;
3707
3708 scb->status = -1;
3709
3710 megaraid_mbox_mm_done(adapter, scb);
3711
3712 return (-EBUSY);
3713 }
3714
3715 return 0;
3716 }
3717
3718 // put the command on the pending list and execute
3719 megaraid_mbox_runpendq(adapter, scb);
3720
3721 return 0;
3722}
3723
3724
3725static int
3726wait_till_fw_empty(adapter_t *adapter)
3727{
3728 unsigned long flags = 0;
3729 int i;
3730
3731
3732 /*
3733 * Set the quiescent flag to stop issuing cmds to FW.
3734 */
f2c8dc40 3735 spin_lock_irqsave(&adapter->lock, flags);
1da177e4 3736 adapter->quiescent++;
f2c8dc40 3737 spin_unlock_irqrestore(&adapter->lock, flags);
1da177e4
LT		 3738
3739 /*
3740 * Wait till there are no more cmds outstanding at FW. Try for at most
3741 * 60 seconds
3742 */
3743 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3744 con_log(CL_DLEVEL1, (KERN_INFO
3745 "megaraid: FW has %d pending commands\n",
3746 adapter->outstanding_cmds));
3747
3748 msleep(1000);
3749 }
3750
3751 return adapter->outstanding_cmds;
3752}
3753
3754
3755/**
3756 * megaraid_mbox_mm_done - callback for CMM commands
3757 * @adapter : HBA soft state
3758 * @scb : completed command
3759 *
3760 * Callback routine for internal commands originated from the management
3761 * module.
3762 */
3763static void
3764megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3765{
3766 uioc_t *kioc;
3767 mbox64_t *mbox64;
3768 uint8_t *raw_mbox;
3769 unsigned long flags;
3770
3771 kioc = (uioc_t *)scb->gp;
1da177e4
LT		 3772 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3773 mbox64->mbox32.status = scb->status;
3774 raw_mbox = (uint8_t *)&mbox64->mbox32;
3775
3776
3777 // put scb in the free pool
3778 scb->state = SCB_FREE;
3779 scb->scp = NULL;
3780
3781 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3782
3783 list_add(&scb->list, &adapter->uscb_pool);
3784
3785 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3786
3787 // if a delete logical drive operation succeeded, restart the
3788 // controller
3789 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3790
3791 adapter->quiescent--;
3792
3793 megaraid_mbox_runpendq(adapter, NULL);
3794 }
3795
3796 kioc->done(kioc);
3797
3798 return;
3799}
3800
3801
3802/**
3803 * gather_hbainfo - HBA characteristics for the applications
a69b74d3
RD		 3804 * @adapter : HBA soft state
3805 * @hinfo : pointer to the caller's host info strucuture
1da177e4
LT		 3806 */
3807static int
3808gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3809{
3810 uint8_t dmajor;
3811
3812 dmajor = megaraid_mbox_version[0];
3813
3814 hinfo->pci_vendor_id = adapter->pdev->vendor;
3815 hinfo->pci_device_id = adapter->pdev->device;
3816 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3817 hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3818
3819 hinfo->pci_bus = adapter->pdev->bus->number;
3820 hinfo->pci_dev_fn = adapter->pdev->devfn;
3821 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn);
3822 hinfo->irq = adapter->host->irq;
3823 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport;
3824
3825 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3826 hinfo->host_no = adapter->host->host_no;
3827
3828 return 0;
3829}
3830
3831/*
3832 * END: Interface for the common management module
3833 */
3834
3835
3836
3837/**
3838 * megaraid_sysfs_alloc_resources - allocate sysfs related resources
a69b74d3 3839 * @adapter : controller's soft state
1da177e4
LT		 3840 *
3841 * Allocate packets required to issue FW calls whenever the sysfs attributes
3842 * are read. These attributes would require up-to-date information from the
3843 * FW. Also set up resources for mutual exclusion to share these resources and
3844 * the wait queue.
3845 *
a69b74d3
RD		 3846 * Return 0 on success.
3847 * Return -ERROR_CODE on failure.
1da177e4
LT		 3848 */
3849static int
3850megaraid_sysfs_alloc_resources(adapter_t *adapter)
3851{
3852 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3853 int rval = 0;
3854
3855 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3856
3857 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3858
3859 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3860 PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3861
3862 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3863 !raid_dev->sysfs_buffer) {
3864
3865 con_log(CL_ANN, (KERN_WARNING
3866 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3867 __LINE__));
3868
3869 rval = -ENOMEM;
3870
3871 megaraid_sysfs_free_resources(adapter);
3872 }
3873
0c2cc433 3874 mutex_init(&raid_dev->sysfs_mtx);
1da177e4
LT		 3875
3876 init_waitqueue_head(&raid_dev->sysfs_wait_q);
3877
3878 return rval;
3879}
3880
3881
3882/**
3883 * megaraid_sysfs_free_resources - free sysfs related resources
a69b74d3 3884 * @adapter : controller's soft state
1da177e4
LT		 3885 *
3886 * Free packets allocated for sysfs FW commands
1da177e4
LT		 3887 */
3888static void
3889megaraid_sysfs_free_resources(adapter_t *adapter)
3890{
3891 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3892
c9475cb0
JJ		 3893 kfree(raid_dev->sysfs_uioc);
3894 kfree(raid_dev->sysfs_mbox64);
1da177e4
LT		 3895
3896 if (raid_dev->sysfs_buffer) {
3897 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3898 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3899 }
3900}
3901
3902
3903/**
3904 * megaraid_sysfs_get_ldmap_done - callback for get ldmap
a69b74d3 3905 * @uioc : completed packet
1da177e4
LT		 3906 *
3907 * Callback routine called in the ISR/tasklet context for get ldmap call
1da177e4
LT		 3908 */
3909static void
3910megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3911{
3912 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3913 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3914
3915 uioc->status = 0;
3916
3917 wake_up(&raid_dev->sysfs_wait_q);
3918}
3919
3920
3921/**
3922 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
a69b74d3 3923 * @data : timed out packet
1da177e4
LT		 3924 *
3925 * Timeout routine to recover and return to application, in case the adapter
a69b74d3
RD		 3926 * has stopped responding. A timeout of 60 seconds for this command seems like
3927 * a good value.
1da177e4
LT		 3928 */
3929static void
3930megaraid_sysfs_get_ldmap_timeout(unsigned long data)
3931{
3932 uioc_t *uioc = (uioc_t *)data;
3933 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3934 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3935
3936 uioc->status = -ETIME;
3937
3938 wake_up(&raid_dev->sysfs_wait_q);
3939}
3940
3941
3942/**
3943 * megaraid_sysfs_get_ldmap - get update logical drive map
a69b74d3 3944 * @adapter : controller's soft state
1da177e4
LT		 3945 *
3946 * This routine will be called whenever user reads the logical drive
3947 * attributes, go get the current logical drive mapping table from the
3948 * firmware. We use the managment API's to issue commands to the controller.
3949 *
3950 * NOTE: The commands issuance functionality is not generalized and
3951 * implemented in context of "get ld map" command only. If required, the
3952 * command issuance logical can be trivially pulled out and implemented as a
3953 * standalone libary. For now, this should suffice since there is no other
3954 * user of this interface.
3955 *
a69b74d3
RD		 3956 * Return 0 on success.
3957 * Return -1 on failure.
1da177e4
LT		 3958 */
3959static int
3960megaraid_sysfs_get_ldmap(adapter_t *adapter)
3961{
3962 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3963 uioc_t *uioc;
3964 mbox64_t *mbox64;
3965 mbox_t *mbox;
3966 char *raw_mbox;
3967 struct timer_list sysfs_timer;
3968 struct timer_list *timerp;
3969 caddr_t ldmap;
3970 int rval = 0;
3971
3972 /*
3973 * Allow only one read at a time to go through the sysfs attributes
3974 */
0c2cc433 3975 mutex_lock(&raid_dev->sysfs_mtx);
1da177e4
LT		 3976
3977 uioc = raid_dev->sysfs_uioc;
3978 mbox64 = raid_dev->sysfs_mbox64;
3979 ldmap = raid_dev->sysfs_buffer;
3980
3981 memset(uioc, 0, sizeof(uioc_t));
3982 memset(mbox64, 0, sizeof(mbox64_t));
3983 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
3984
3985 mbox = &mbox64->mbox32;
3986 raw_mbox = (char *)mbox;
3987 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64;
3988 uioc->buf_vaddr = (caddr_t)adapter;
3989 uioc->status = -ENODATA;
3990 uioc->done = megaraid_sysfs_get_ldmap_done;
3991
3992 /*
3993 * Prepare the mailbox packet to get the current logical drive mapping
3994 * table
3995 */
3996 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
3997
3998 raw_mbox[0] = FC_DEL_LOGDRV;
3999 raw_mbox[2] = OP_GET_LDID_MAP;
4000
4001 /*
4002 * Setup a timer to recover from a non-responding controller
4003 */
4004 timerp = &sysfs_timer;
4005 init_timer(timerp);
4006
4007 timerp->function = megaraid_sysfs_get_ldmap_timeout;
4008 timerp->data = (unsigned long)uioc;
4009 timerp->expires = jiffies + 60 * HZ;
4010
4011 add_timer(timerp);
4012
4013 /*
4014 * Send the command to the firmware
4015 */
4016 rval = megaraid_mbox_mm_command(adapter, uioc);
4017
4018 if (rval == 0) { // command successfully issued
4019 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4020
4021 /*
4022 * Check if the command timed out
4023 */
4024 if (uioc->status == -ETIME) {
4025 con_log(CL_ANN, (KERN_NOTICE
4026 "megaraid: sysfs get ld map timed out\n"));
4027
4028 rval = -ETIME;
4029 }
4030 else {
4031 rval = mbox->status;
4032 }
4033
4034 if (rval == 0) {
4035 memcpy(raid_dev->curr_ldmap, ldmap,
4036 sizeof(raid_dev->curr_ldmap));
4037 }
4038 else {
4039 con_log(CL_ANN, (KERN_NOTICE
4040 "megaraid: get ld map failed with %x\n", rval));
4041 }
4042 }
4043 else {
4044 con_log(CL_ANN, (KERN_NOTICE
4045 "megaraid: could not issue ldmap command:%x\n", rval));
4046 }
4047
4048
4049 del_timer_sync(timerp);
4050
0c2cc433 4051 mutex_unlock(&raid_dev->sysfs_mtx);
1da177e4
LT		 4052
4053 return rval;
4054}
4055
4056
4057/**
4058 * megaraid_sysfs_show_app_hndl - display application handle for this adapter
a69b74d3
RD		 4059 * @cdev : class device object representation for the host
4060 * @buf : buffer to send data to
1da177e4
LT		 4061 *
4062 * Display the handle used by the applications while executing management
4063 * tasks on the adapter. We invoke a management module API to get the adapter
4064 * handle, since we do not interface with applications directly.
1da177e4
LT		 4065 */
4066static ssize_t
4067megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf)
4068{
4069 struct Scsi_Host *shost = class_to_shost(cdev);
4070 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4071 uint32_t app_hndl;
4072
4073 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4074
4075 return snprintf(buf, 8, "%u\n", app_hndl);
4076}
4077
4078
4079/**
4080 * megaraid_sysfs_show_ldnum - display the logical drive number for this device
a69b74d3
RD		 4081 * @dev : device object representation for the scsi device
4082 * @attr : device attribute to show
4083 * @buf : buffer to send data to
1da177e4
LT		 4084 *
4085 * Display the logical drive number for the device in question, if it a valid
a69b74d3
RD		 4086 * logical drive. For physical devices, "-1" is returned.
4087 *
4088 * The logical drive number is displayed in following format:
1da177e4
LT		 4089 *
4090 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
1da177e4 4091 *
a69b74d3 4092 * <int> <int> <int> <int>
1da177e4
LT		 4093 */
4094static ssize_t
10523b3b 4095megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 4096{
4097 struct scsi_device *sdev = to_scsi_device(dev);
4098 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4099 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4100 int scsi_id = -1;
4101 int logical_drv = -1;
4102 int ldid_map = -1;
4103 uint32_t app_hndl = 0;
4104 int mapped_sdev_id;
4105 int rval;
4106 int i;
4107
4108 if (raid_dev->random_del_supported &&
4109 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4110
4111 rval = megaraid_sysfs_get_ldmap(adapter);
4112 if (rval == 0) {
4113
4114 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4115
4116 mapped_sdev_id = sdev->id;
4117
4118 if (sdev->id > adapter->init_id) {
4119 mapped_sdev_id -= 1;
4120 }
4121
4122 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4123
4124 scsi_id = sdev->id;
4125
4126 logical_drv = i;
4127
4128 ldid_map = raid_dev->curr_ldmap[i];
4129
4130 app_hndl = mraid_mm_adapter_app_handle(
4131 adapter->unique_id);
4132
4133 break;
4134 }
4135 }
4136 }
4137 else {
4138 con_log(CL_ANN, (KERN_NOTICE
4139 "megaraid: sysfs get ld map failed: %x\n",
4140 rval));
4141 }
4142 }
4143
4144 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4145 ldid_map, app_hndl);
4146}
4147
4148
4149/*
4150 * END: Mailbox Low Level Driver
4151 */
4152module_init(megaraid_init);
4153module_exit(megaraid_exit);
4154
4155/* vim: set ts=8 sw=8 tw=78 ai si: */
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