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[SCSI] megaraid_sas: convert to use the data buffer accessors
[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
LT		 363 .use_clustering = ENABLE_CLUSTERING,
364 .sdev_attrs = megaraid_sdev_attrs,
365 .shost_attrs = megaraid_shost_attrs,
366};
367
368
369/**
370 * megaraid_init - module load hook
371 *
372 * We register ourselves as hotplug enabled module and let PCI subsystem
a69b74d3
RD		 373 * discover our adapters.
374 */
1da177e4
LT		 375static int __init
376megaraid_init(void)
377{
378 int rval;
379
380 // Announce the driver version
381 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
382 MEGARAID_EXT_VERSION));
383
384 // check validity of module parameters
385 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
386
387 con_log(CL_ANN, (KERN_WARNING
388 "megaraid mailbox: max commands per lun reset to %d\n",
389 MBOX_MAX_SCSI_CMDS));
390
391 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
392 }
393
394
395 // register as a PCI hot-plug driver module
672b2d38
JS		 396 rval = pci_register_driver(&megaraid_pci_driver_g);
397 if (rval < 0) {
1da177e4
LT		 398 con_log(CL_ANN, (KERN_WARNING
399 "megaraid: could not register hotplug support.\n"));
400 }
401
402 return rval;
403}
404
405
406/**
407 * megaraid_exit - driver unload entry point
408 *
a69b74d3 409 * We simply unwrap the megaraid_init routine here.
1da177e4
LT		 410 */
411static void __exit
412megaraid_exit(void)
413{
414 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
415
416 // unregister as PCI hotplug driver
417 pci_unregister_driver(&megaraid_pci_driver_g);
418
419 return;
420}
421
422
423/**
424 * megaraid_probe_one - PCI hotplug entry point
a69b74d3
RD		 425 * @pdev : handle to this controller's PCI configuration space
426 * @id : pci device id of the class of controllers
1da177e4
LT		 427 *
428 * This routine should be called whenever a new adapter is detected by the
429 * PCI hotplug susbsytem.
a69b74d3 430 */
1da177e4
LT		 431static int __devinit
432megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
433{
434 adapter_t *adapter;
435
436
437 // detected a new controller
438 con_log(CL_ANN, (KERN_INFO
439 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
440 pdev->vendor, pdev->device, pdev->subsystem_vendor,
441 pdev->subsystem_device));
442
443 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
444 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
445
446 if (pci_enable_device(pdev)) {
447 con_log(CL_ANN, (KERN_WARNING
448 "megaraid: pci_enable_device failed\n"));
449
450 return -ENODEV;
451 }
452
453 // Enable bus-mastering on this controller
454 pci_set_master(pdev);
455
456 // Allocate the per driver initialization structure
457 adapter = kmalloc(sizeof(adapter_t), GFP_KERNEL);
458
459 if (adapter == NULL) {
460 con_log(CL_ANN, (KERN_WARNING
461 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__));
462
463 goto out_probe_one;
464 }
465 memset(adapter, 0, sizeof(adapter_t));
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 */
749 raid_dev = kmalloc(sizeof(mraid_device_t), GFP_KERNEL);
750 if (raid_dev == NULL) return -1;
751
752 memset(raid_dev, 0, sizeof(mraid_device_t));
753
754 /*
755 * Attach the adapter soft state to raid device soft state
756 */
757 adapter->raid_device = (caddr_t)raid_dev;
758 raid_dev->fast_load = megaraid_fast_load;
759
760
761 // our baseport
762 raid_dev->baseport = pci_resource_start(pdev, 0);
763
764 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
765
766 con_log(CL_ANN, (KERN_WARNING
767 "megaraid: mem region busy\n"));
768
769 goto out_free_raid_dev;
770 }
771
772 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
773
774 if (!raid_dev->baseaddr) {
775
776 con_log(CL_ANN, (KERN_WARNING
777 "megaraid: could not map hba memory\n") );
778
779 goto out_release_regions;
780 }
781
cd96d96f
SP		 782 /* initialize the mutual exclusion lock for the mailbox */
783 spin_lock_init(&raid_dev->mailbox_lock);
784
785 /* allocate memory required for commands */
786 if (megaraid_alloc_cmd_packets(adapter) != 0)
787 goto out_iounmap;
1da177e4 788
cd96d96f
SP		 789 /*
790 * Issue SYNC cmd to flush the pending cmds in the adapter
791 * and initialize its internal state
792 */
793
794 if (megaraid_mbox_fire_sync_cmd(adapter))
795 con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
796
797 /*
798 * Setup the rest of the soft state using the library of
799 * FW routines
800 */
801
802 /* request IRQ and register the interrupt service routine */
1d6f359a 803 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
1da177e4
LT		 804 adapter)) {
805
806 con_log(CL_ANN, (KERN_WARNING
807 "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
cd96d96f 808 goto out_alloc_cmds;
1da177e4 809
1da177e4
LT		 810 }
811
812 // Product info
cd96d96f
SP		 813 if (megaraid_mbox_product_info(adapter) != 0)
814 goto out_free_irq;
1da177e4
LT		 815
816 // Do we support extended CDBs
817 adapter->max_cdb_sz = 10;
818 if (megaraid_mbox_extended_cdb(adapter) == 0) {
819 adapter->max_cdb_sz = 16;
820 }
821
822 /*
823 * Do we support cluster environment, if we do, what is the initiator
824 * id.
825 * NOTE: In a non-cluster aware firmware environment, the LLD should
826 * return 7 as initiator id.
827 */
828 adapter->ha = 0;
829 adapter->init_id = -1;
830 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
831 adapter->ha = 1;
832 }
833
834 /*
835 * Prepare the device ids array to have the mapping between the kernel
836 * device address and megaraid device address.
837 * We export the physical devices on their actual addresses. The
838 * logical drives are exported on a virtual SCSI channel
839 */
840 megaraid_mbox_setup_device_map(adapter);
841
842 // If the firmware supports random deletion, update the device id map
843 if (megaraid_mbox_support_random_del(adapter)) {
844
845 // Change the logical drives numbers in device_ids array one
846 // slot in device_ids is reserved for target id, that's why
847 // "<=" below
848 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
849 adapter->device_ids[adapter->max_channel][i] += 0x80;
850 }
851 adapter->device_ids[adapter->max_channel][adapter->init_id] =
852 0xFF;
853
854 raid_dev->random_del_supported = 1;
855 }
856
857 /*
858 * find out the maximum number of scatter-gather elements supported by
859 * this firmware
860 */
861 adapter->sglen = megaraid_mbox_get_max_sg(adapter);
862
863 // enumerate RAID and SCSI channels so that all devices on SCSI
864 // channels can later be exported, including disk devices
865 megaraid_mbox_enum_raid_scsi(adapter);
866
867 /*
868 * Other parameters required by upper layer
869 *
870 * maximum number of sectors per IO command
871 */
872 adapter->max_sectors = megaraid_max_sectors;
873
874 /*
875 * number of queued commands per LUN.
876 */
877 adapter->cmd_per_lun = megaraid_cmd_per_lun;
878
879 /*
880 * Allocate resources required to issue FW calls, when sysfs is
881 * accessed
882 */
cd96d96f
SP		 883 if (megaraid_sysfs_alloc_resources(adapter) != 0)
884 goto out_free_irq;
1da177e4
LT		 885
886 // Set the DMA mask to 64-bit. All supported controllers as capable of
887 // DMA in this range
fbf60802
JS		 888 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
889
890 if (((magic64 == HBA_SIGNATURE_64_BIT) &&
891 ((adapter->pdev->subsystem_device !=
8741ca71 892 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
fbf60802
JS		 893 (adapter->pdev->subsystem_device !=
894 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
895 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
896 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
897 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
898 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
899 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
900 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
901 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
902 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
903 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
904 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
905 if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK)) {
906 con_log(CL_ANN, (KERN_WARNING
907 "megaraid: DMA mask for 64-bit failed\n"));
908
909 if (pci_set_dma_mask (adapter->pdev, DMA_32BIT_MASK)) {
910 con_log(CL_ANN, (KERN_WARNING
911 "megaraid: 32-bit DMA mask failed\n"));
912 goto out_free_sysfs_res;
913 }
914 }
1da177e4
LT		 915 }
916
917 // setup tasklet for DPC
918 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
919 (unsigned long)adapter);
920
921 con_log(CL_DLEVEL1, (KERN_INFO
922 "megaraid mbox hba successfully initialized\n"));
923
924 return 0;
925
926out_free_sysfs_res:
927 megaraid_sysfs_free_resources(adapter);
1da177e4
LT		 928out_free_irq:
929 free_irq(adapter->irq, adapter);
cd96d96f
SP		 930out_alloc_cmds:
931 megaraid_free_cmd_packets(adapter);
1da177e4
LT		 932out_iounmap:
933 iounmap(raid_dev->baseaddr);
934out_release_regions:
935 pci_release_regions(pdev);
936out_free_raid_dev:
937 kfree(raid_dev);
938
939 return -1;
940}
941
942
943/**
944 * megaraid_fini_mbox - undo controller initialization
a69b74d3 945 * @adapter : our soft state
1da177e4
LT		 946 */
947static void
948megaraid_fini_mbox(adapter_t *adapter)
949{
950 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
951
952 // flush all caches
953 megaraid_mbox_flush_cache(adapter);
954
955 tasklet_kill(&adapter->dpc_h);
956
957 megaraid_sysfs_free_resources(adapter);
958
959 megaraid_free_cmd_packets(adapter);
960
961 free_irq(adapter->irq, adapter);
962
963 iounmap(raid_dev->baseaddr);
964
965 pci_release_regions(adapter->pdev);
966
967 kfree(raid_dev);
968
969 return;
970}
971
972
973/**
974 * megaraid_alloc_cmd_packets - allocate shared mailbox
a69b74d3 975 * @adapter : soft state of the raid controller
1da177e4
LT		 976 *
977 * Allocate and align the shared mailbox. This maibox is used to issue
978 * all the commands. For IO based controllers, the mailbox is also regsitered
979 * with the FW. Allocate memory for all commands as well.
a69b74d3 980 * This is our big allocator.
1da177e4
LT		 981 */
982static int
983megaraid_alloc_cmd_packets(adapter_t *adapter)
984{
985 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
986 struct pci_dev *pdev;
987 unsigned long align;
988 scb_t *scb;
989 mbox_ccb_t *ccb;
990 struct mraid_pci_blk *epthru_pci_blk;
991 struct mraid_pci_blk *sg_pci_blk;
992 struct mraid_pci_blk *mbox_pci_blk;
993 int i;
994
995 pdev = adapter->pdev;
996
997 /*
998 * Setup the mailbox
999 * Allocate the common 16-byte aligned memory for the handshake
1000 * mailbox.
1001 */
1002 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
1003 sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
1004
1005 if (!raid_dev->una_mbox64) {
1006 con_log(CL_ANN, (KERN_WARNING
1007 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1008 __LINE__));
1009 return -1;
1010 }
1011 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
1012
1013 /*
1014 * Align the mailbox at 16-byte boundary
1015 */
1016 raid_dev->mbox = &raid_dev->una_mbox64->mbox32;
1017
1018 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
1019 (~0UL ^ 0xFUL));
1020
1021 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
1022
1023 align = ((void *)raid_dev->mbox -
1024 ((void *)&raid_dev->una_mbox64->mbox32));
1025
1026 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1027 align;
1028
1029 // Allocate memory for commands issued internally
1030 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
1031 &adapter->ibuf_dma_h);
1032 if (!adapter->ibuf) {
1033
1034 con_log(CL_ANN, (KERN_WARNING
1035 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1036 __LINE__));
1037
1038 goto out_free_common_mbox;
1039 }
1040 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
1041
1042 // Allocate memory for our SCSI Command Blocks and their associated
1043 // memory
1044
1045 /*
1046 * Allocate memory for the base list of scb. Later allocate memory for
1047 * CCBs and embedded components of each CCB and point the pointers in
1048 * scb to the allocated components
1049 * NOTE: The code to allocate SCB will be duplicated in all the LLD
1050 * since the calling routine does not yet know the number of available
1051 * commands.
1052 */
1053 adapter->kscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_SCSI_CMDS,
1054 GFP_KERNEL);
1055
1056 if (adapter->kscb_list == NULL) {
1057 con_log(CL_ANN, (KERN_WARNING
1058 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1059 __LINE__));
1060 goto out_free_ibuf;
1061 }
1062 memset(adapter->kscb_list, 0, sizeof(scb_t) * MBOX_MAX_SCSI_CMDS);
1063
1064 // memory allocation for our command packets
1065 if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1066 con_log(CL_ANN, (KERN_WARNING
1067 "megaraid: out of memory, %s %d\n", __FUNCTION__,
1068 __LINE__));
1069 goto out_free_scb_list;
1070 }
1071
1072 // Adjust the scb pointers and link in the free pool
1073 epthru_pci_blk = raid_dev->epthru_pool;
1074 sg_pci_blk = raid_dev->sg_pool;
1075 mbox_pci_blk = raid_dev->mbox_pool;
1076
1077 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1078 scb = adapter->kscb_list + i;
1079 ccb = raid_dev->ccb_list + i;
1080
1081 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1082 ccb->raw_mbox = (uint8_t *)ccb->mbox;
1083 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1084 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1085
1086 // make sure the mailbox is aligned properly
1087 if (ccb->mbox_dma_h & 0x0F) {
1088 con_log(CL_ANN, (KERN_CRIT
1089 "megaraid mbox: not aligned on 16-bytes\n"));
1090
1091 goto out_teardown_dma_pools;
1092 }
1093
1094 ccb->epthru = (mraid_epassthru_t *)
1095 epthru_pci_blk[i].vaddr;
1096 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr;
1097 ccb->pthru = (mraid_passthru_t *)ccb->epthru;
1098 ccb->pthru_dma_h = ccb->epthru_dma_h;
1099
1100
1101 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1102 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr;
1103 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64;
1104
1105 scb->ccb = (caddr_t)ccb;
1106 scb->gp = 0;
1107
1108 scb->sno = i; // command index
1109
1110 scb->scp = NULL;
1111 scb->state = SCB_FREE;
1112 scb->dma_direction = PCI_DMA_NONE;
1113 scb->dma_type = MRAID_DMA_NONE;
1114 scb->dev_channel = -1;
1115 scb->dev_target = -1;
1116
1117 // put scb in the free pool
1118 list_add_tail(&scb->list, &adapter->kscb_pool);
1119 }
1120
1121 return 0;
1122
1123out_teardown_dma_pools:
1124 megaraid_mbox_teardown_dma_pools(adapter);
1125out_free_scb_list:
1126 kfree(adapter->kscb_list);
1127out_free_ibuf:
1128 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1129 adapter->ibuf_dma_h);
1130out_free_common_mbox:
1131 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1132 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1133
1134 return -1;
1135}
1136
1137
1138/**
1139 * megaraid_free_cmd_packets - free memory
a69b74d3 1140 * @adapter : soft state of the raid controller
1da177e4 1141 *
a69b74d3 1142 * Release memory resources allocated for commands.
1da177e4
LT		 1143 */
1144static void
1145megaraid_free_cmd_packets(adapter_t *adapter)
1146{
1147 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1148
1149 megaraid_mbox_teardown_dma_pools(adapter);
1150
1151 kfree(adapter->kscb_list);
1152
1153 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1154 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1155
1156 pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1157 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1158 return;
1159}
1160
1161
1162/**
1163 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
a69b74d3 1164 * @adapter : HBA soft state
1da177e4 1165 *
a69b74d3
RD		 1166 * Setup the dma pools for mailbox, passthru and extended passthru structures,
1167 * and scatter-gather lists.
1da177e4
LT		 1168 */
1169static int
1170megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1171{
1172 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1173 struct mraid_pci_blk *epthru_pci_blk;
1174 struct mraid_pci_blk *sg_pci_blk;
1175 struct mraid_pci_blk *mbox_pci_blk;
1176 int i;
1177
1178
1179
1180 // Allocate memory for 16-bytes aligned mailboxes
1181 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1182 adapter->pdev,
1183 sizeof(mbox64_t) + 16,
1184 16, 0);
1185
1186 if (raid_dev->mbox_pool_handle == NULL) {
1187 goto fail_setup_dma_pool;
1188 }
1189
1190 mbox_pci_blk = raid_dev->mbox_pool;
1191 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1192 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1193 raid_dev->mbox_pool_handle,
1194 GFP_KERNEL,
1195 &mbox_pci_blk[i].dma_addr);
1196 if (!mbox_pci_blk[i].vaddr) {
1197 goto fail_setup_dma_pool;
1198 }
1199 }
1200
1201 /*
1202 * Allocate memory for each embedded passthru strucuture pointer
1203 * Request for a 128 bytes aligned structure for each passthru command
1204 * structure
1205 * Since passthru and extended passthru commands are exclusive, they
1206 * share common memory pool. Passthru structures piggyback on memory
1207 * allocted to extended passthru since passthru is smaller of the two
1208 */
1209 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1210 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1211
1212 if (raid_dev->epthru_pool_handle == NULL) {
1213 goto fail_setup_dma_pool;
1214 }
1215
1216 epthru_pci_blk = raid_dev->epthru_pool;
1217 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1218 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1219 raid_dev->epthru_pool_handle,
1220 GFP_KERNEL,
1221 &epthru_pci_blk[i].dma_addr);
1222 if (!epthru_pci_blk[i].vaddr) {
1223 goto fail_setup_dma_pool;
1224 }
1225 }
1226
1227
1228 // Allocate memory for each scatter-gather list. Request for 512 bytes
1229 // alignment for each sg list
1230 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1231 adapter->pdev,
1232 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1233 512, 0);
1234
1235 if (raid_dev->sg_pool_handle == NULL) {
1236 goto fail_setup_dma_pool;
1237 }
1238
1239 sg_pci_blk = raid_dev->sg_pool;
1240 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1241 sg_pci_blk[i].vaddr = pci_pool_alloc(
1242 raid_dev->sg_pool_handle,
1243 GFP_KERNEL,
1244 &sg_pci_blk[i].dma_addr);
1245 if (!sg_pci_blk[i].vaddr) {
1246 goto fail_setup_dma_pool;
1247 }
1248 }
1249
1250 return 0;
1251
1252fail_setup_dma_pool:
1253 megaraid_mbox_teardown_dma_pools(adapter);
1254 return -1;
1255}
1256
1257
1258/**
1259 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
a69b74d3 1260 * @adapter : HBA soft state
1da177e4 1261 *
a69b74d3
RD		 1262 * Teardown the dma pool for mailbox, passthru and extended passthru
1263 * structures, and scatter-gather lists.
1da177e4
LT		 1264 */
1265static void
1266megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1267{
1268 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1269 struct mraid_pci_blk *epthru_pci_blk;
1270 struct mraid_pci_blk *sg_pci_blk;
1271 struct mraid_pci_blk *mbox_pci_blk;
1272 int i;
1273
1274
1275 sg_pci_blk = raid_dev->sg_pool;
1276 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1277 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1278 sg_pci_blk[i].dma_addr);
1279 }
1280 if (raid_dev->sg_pool_handle)
1281 pci_pool_destroy(raid_dev->sg_pool_handle);
1282
1283
1284 epthru_pci_blk = raid_dev->epthru_pool;
1285 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1286 pci_pool_free(raid_dev->epthru_pool_handle,
1287 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1288 }
1289 if (raid_dev->epthru_pool_handle)
1290 pci_pool_destroy(raid_dev->epthru_pool_handle);
1291
1292
1293 mbox_pci_blk = raid_dev->mbox_pool;
1294 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1295 pci_pool_free(raid_dev->mbox_pool_handle,
1296 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1297 }
1298 if (raid_dev->mbox_pool_handle)
1299 pci_pool_destroy(raid_dev->mbox_pool_handle);
1300
1301 return;
1302}
1303
1304
1305/**
1306 * megaraid_alloc_scb - detach and return a scb from the free list
1307 * @adapter : controller's soft state
a69b74d3 1308 * @scp : pointer to the scsi command to be executed
1da177e4 1309 *
a69b74d3
RD		 1310 * Return the scb from the head of the free list. %NULL if there are none
1311 * available.
1312 */
858119e1 1313static scb_t *
1da177e4
LT		 1314megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1315{
1316 struct list_head *head = &adapter->kscb_pool;
1317 scb_t *scb = NULL;
1318 unsigned long flags;
1319
1320 // detach scb from free pool
1321 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1322
1323 if (list_empty(head)) {
1324 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1325 return NULL;
1326 }
1327
1328 scb = list_entry(head->next, scb_t, list);
1329 list_del_init(&scb->list);
1330
1331 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1332
1333 scb->state = SCB_ACTIVE;
1334 scb->scp = scp;
1335 scb->dma_type = MRAID_DMA_NONE;
1336
1337 return scb;
1338}
1339
1340
1341/**
1342 * megaraid_dealloc_scb - return the scb to the free pool
1343 * @adapter : controller's soft state
1344 * @scb : scb to be freed
1345 *
a69b74d3 1346 * Return the scb back to the free list of scbs. The caller must 'flush' the
1da177e4
LT		 1347 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1348 * NOTE NOTE: Make sure the scb is not on any list before calling this
1349 * routine.
a69b74d3 1350 */
1da177e4
LT		 1351static inline void
1352megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1353{
1354 unsigned long flags;
1355
1356 // put scb in the free pool
1357 scb->state = SCB_FREE;
1358 scb->scp = NULL;
1359 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1360
1361 list_add(&scb->list, &adapter->kscb_pool);
1362
1363 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1364
1365 return;
1366}
1367
1368
1369/**
1370 * megaraid_mbox_mksgl - make the scatter-gather list
a69b74d3
RD		 1371 * @adapter : controller's soft state
1372 * @scb : scsi control block
1da177e4 1373 *
a69b74d3 1374 * Prepare the scatter-gather list.
1da177e4 1375 */
858119e1 1376static int
1da177e4
LT		 1377megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1378{
1379 struct scatterlist *sgl;
1380 mbox_ccb_t *ccb;
1381 struct page *page;
1382 unsigned long offset;
1383 struct scsi_cmnd *scp;
1384 int sgcnt;
1385 int i;
1386
1387
1388 scp = scb->scp;
1389 ccb = (mbox_ccb_t *)scb->ccb;
1390
1391 // no mapping required if no data to be transferred
1392 if (!scp->request_buffer || !scp->request_bufflen)
1393 return 0;
1394
1395 if (!scp->use_sg) { /* scatter-gather list not used */
1396
1397 page = virt_to_page(scp->request_buffer);
1398
1399 offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK);
1400
1401 ccb->buf_dma_h = pci_map_page(adapter->pdev, page, offset,
1402 scp->request_bufflen,
1403 scb->dma_direction);
1404 scb->dma_type = MRAID_DMA_WBUF;
1405
1406 /*
1407 * We need to handle special 64-bit commands that need a
1408 * minimum of 1 SG
1409 */
1410 sgcnt = 1;
1411 ccb->sgl64[0].address = ccb->buf_dma_h;
1412 ccb->sgl64[0].length = scp->request_bufflen;
1413
1414 return sgcnt;
1415 }
1416
1417 sgl = (struct scatterlist *)scp->request_buffer;
1418
1419 // The number of sg elements returned must not exceed our limit
1420 sgcnt = pci_map_sg(adapter->pdev, sgl, scp->use_sg,
1421 scb->dma_direction);
1422
1423 if (sgcnt > adapter->sglen) {
1424 con_log(CL_ANN, (KERN_CRIT
1425 "megaraid critical: too many sg elements:%d\n",
1426 sgcnt));
1427 BUG();
1428 }
1429
1430 scb->dma_type = MRAID_DMA_WSG;
1431
1432 for (i = 0; i < sgcnt; i++, sgl++) {
1433 ccb->sgl64[i].address = sg_dma_address(sgl);
1434 ccb->sgl64[i].length = sg_dma_len(sgl);
1435 }
1436
1437 // Return count of SG nodes
1438 return sgcnt;
1439}
1440
1441
1442/**
1443 * mbox_post_cmd - issue a mailbox command
a69b74d3
RD		 1444 * @adapter : controller's soft state
1445 * @scb : command to be issued
1da177e4 1446 *
a69b74d3 1447 * Post the command to the controller if mailbox is available.
1da177e4 1448 */
858119e1 1449static int
1da177e4
LT		 1450mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1451{
1452 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1453 mbox64_t *mbox64;
1454 mbox_t *mbox;
1455 mbox_ccb_t *ccb;
1456 unsigned long flags;
1457 unsigned int i = 0;
1458
1459
1460 ccb = (mbox_ccb_t *)scb->ccb;
1461 mbox = raid_dev->mbox;
1462 mbox64 = raid_dev->mbox64;
1463
1464 /*
1465 * Check for busy mailbox. If it is, return failure - the caller
1466 * should retry later.
1467 */
1468 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1469
1470 if (unlikely(mbox->busy)) {
1471 do {
1472 udelay(1);
1473 i++;
1474 rmb();
1475 } while(mbox->busy && (i < max_mbox_busy_wait));
1476
1477 if (mbox->busy) {
1478
1479 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1480
1481 return -1;
1482 }
1483 }
1484
1485
1486 // Copy this command's mailbox data into "adapter's" mailbox
1487 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1488 mbox->cmdid = scb->sno;
1489
1490 adapter->outstanding_cmds++;
1491
1492 if (scb->dma_direction == PCI_DMA_TODEVICE) {
1493 if (!scb->scp->use_sg) { // sg list not used
1494 pci_dma_sync_single_for_device(adapter->pdev,
1495 ccb->buf_dma_h,
1496 scb->scp->request_bufflen,
1497 PCI_DMA_TODEVICE);
1498 }
1499 else {
1500 pci_dma_sync_sg_for_device(adapter->pdev,
1501 scb->scp->request_buffer,
1502 scb->scp->use_sg, PCI_DMA_TODEVICE);
1503 }
1504 }
1505
1506 mbox->busy = 1; // Set busy
1507 mbox->poll = 0;
1508 mbox->ack = 0;
1509 wmb();
1510
1511 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1512
1513 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1514
1515 return 0;
1516}
1517
1518
1519/**
1520 * megaraid_queue_command - generic queue entry point for all LLDs
1521 * @scp : pointer to the scsi command to be executed
1522 * @done : callback routine to be called after the cmd has be completed
1523 *
1524 * Queue entry point for mailbox based controllers.
1525 */
1526static int
a69b74d3 1527megaraid_queue_command(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *))
1da177e4
LT		 1528{
1529 adapter_t *adapter;
1530 scb_t *scb;
1531 int if_busy;
1532
1533 adapter = SCP2ADAPTER(scp);
1534 scp->scsi_done = done;
1535 scp->result = 0;
1536
1da177e4
LT		 1537 /*
1538 * Allocate and build a SCB request
1539 * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1540 * not allocate scb. We will return non-zero status in that case.
1541 * NOTE: scb can be null even though certain commands completed
1542 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1543 * return 0 in that case, and we would do the callback right away.
1544 */
1545 if_busy = 0;
f2c8dc40 1546 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1da177e4
LT		 1547 if (!scb) { // command already completed
1548 done(scp);
1549 return 0;
1550 }
1551
f2c8dc40 1552 megaraid_mbox_runpendq(adapter, scb);
1da177e4
LT		 1553 return if_busy;
1554}
1555
1da177e4 1556/**
a69b74d3
RD		 1557 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
1558 * @adapter : controller's soft state
1559 * @scp : mid-layer scsi command pointer
1560 * @busy : set if request could not be completed because of lack of
1da177e4
LT		 1561 * resources
1562 *
a69b74d3
RD		 1563 * Transform the mid-layer scsi command to megaraid firmware lingua.
1564 * Convert the command issued by mid-layer to format understood by megaraid
1565 * firmware. We also complete certain commands without sending them to firmware.
1da177e4
LT		 1566 */
1567static scb_t *
1568megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1569{
1570 mraid_device_t *rdev = ADAP2RAIDDEV(adapter);
1571 int channel;
1572 int target;
1573 int islogical;
1574 mbox_ccb_t *ccb;
1575 mraid_passthru_t *pthru;
1576 mbox64_t *mbox64;
1577 mbox_t *mbox;
1578 scb_t *scb;
1579 char skip[] = "skipping";
1580 char scan[] = "scanning";
1581 char *ss;
1582
1583
1584 /*
1585 * Get the appropriate device map for the device this command is
1586 * intended for
1587 */
1588 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1589
1590 /*
1591 * Logical drive commands
1592 */
1593 if (islogical) {
1594 switch (scp->cmnd[0]) {
1595 case TEST_UNIT_READY:
1596 /*
1597 * Do we support clustering and is the support enabled
1598 * If no, return success always
1599 */
1600 if (!adapter->ha) {
1601 scp->result = (DID_OK << 16);
1602 return NULL;
1603 }
1604
1605 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1606 scp->result = (DID_ERROR << 16);
1607 *busy = 1;
1608 return NULL;
1609 }
1610
1611 scb->dma_direction = scp->sc_data_direction;
1612 scb->dev_channel = 0xFF;
1613 scb->dev_target = target;
1614 ccb = (mbox_ccb_t *)scb->ccb;
1615
1616 /*
1617 * The command id will be provided by the command
1618 * issuance routine
1619 */
1620 ccb->raw_mbox[0] = CLUSTER_CMD;
1621 ccb->raw_mbox[2] = RESERVATION_STATUS;
1622 ccb->raw_mbox[3] = target;
1623
1624 return scb;
1625
1626 case MODE_SENSE:
1627 if (scp->use_sg) {
1628 struct scatterlist *sgl;
1629 caddr_t vaddr;
1630
1631 sgl = (struct scatterlist *)scp->request_buffer;
1632 if (sgl->page) {
1633 vaddr = (caddr_t)
1634 (page_address((&sgl[0])->page)
1635 + (&sgl[0])->offset);
1636
1637 memset(vaddr, 0, scp->cmnd[4]);
1638 }
1639 else {
1640 con_log(CL_ANN, (KERN_WARNING
1641 "megaraid mailbox: invalid sg:%d\n",
1642 __LINE__));
1643 }
1644 }
1645 else {
1646 memset(scp->request_buffer, 0, scp->cmnd[4]);
1647 }
1648 scp->result = (DID_OK << 16);
1649 return NULL;
1650
1651 case INQUIRY:
1652 /*
1653 * Display the channel scan for logical drives
1654 * Do not display scan for a channel if already done.
1655 */
1656 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1657
1658 con_log(CL_ANN, (KERN_INFO
1659 "scsi[%d]: scanning scsi channel %d",
1660 adapter->host->host_no,
1661 SCP2CHANNEL(scp)));
1662
1663 con_log(CL_ANN, (
1664 " [virtual] for logical drives\n"));
1665
1666 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1667 }
1668
aa677bc7
JS		 1669 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1670 scp->sense_buffer[0] = 0x70;
1671 scp->sense_buffer[2] = ILLEGAL_REQUEST;
1672 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB;
1673 scp->result = CHECK_CONDITION << 1;
1674 return NULL;
1675 }
1676
1da177e4
LT		 1677 /* Fall through */
1678
1679 case READ_CAPACITY:
1680 /*
1681 * Do not allow LUN > 0 for logical drives and
1682 * requests for more than 40 logical drives
1683 */
1684 if (SCP2LUN(scp)) {
1685 scp->result = (DID_BAD_TARGET << 16);
1686 return NULL;
1687 }
1688 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1689 scp->result = (DID_BAD_TARGET << 16);
1690 return NULL;
1691 }
1692
1693
1694 /* Allocate a SCB and initialize passthru */
1695 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1696 scp->result = (DID_ERROR << 16);
1697 *busy = 1;
1698 return NULL;
1699 }
1700
1701 ccb = (mbox_ccb_t *)scb->ccb;
1702 scb->dev_channel = 0xFF;
1703 scb->dev_target = target;
1704 pthru = ccb->pthru;
1705 mbox = ccb->mbox;
1706 mbox64 = ccb->mbox64;
1707
1708 pthru->timeout = 0;
1709 pthru->ars = 1;
1710 pthru->reqsenselen = 14;
1711 pthru->islogical = 1;
1712 pthru->logdrv = target;
1713 pthru->cdblen = scp->cmd_len;
1714 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1715
1716 mbox->cmd = MBOXCMD_PASSTHRU64;
1717 scb->dma_direction = scp->sc_data_direction;
1718
1719 pthru->dataxferlen = scp->request_bufflen;
1720 pthru->dataxferaddr = ccb->sgl_dma_h;
1721 pthru->numsge = megaraid_mbox_mksgl(adapter,
1722 scb);
1723
1724 mbox->xferaddr = 0xFFFFFFFF;
1725 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h;
1726 mbox64->xferaddr_hi = 0;
1727
1728 return scb;
1729
1730 case READ_6:
1731 case WRITE_6:
1732 case READ_10:
1733 case WRITE_10:
1734 case READ_12:
1735 case WRITE_12:
1736
1737 /*
1738 * Allocate a SCB and initialize mailbox
1739 */
1740 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1741 scp->result = (DID_ERROR << 16);
1742 *busy = 1;
1743 return NULL;
1744 }
1745 ccb = (mbox_ccb_t *)scb->ccb;
1746 scb->dev_channel = 0xFF;
1747 scb->dev_target = target;
1748 mbox = ccb->mbox;
1749 mbox64 = ccb->mbox64;
1750 mbox->logdrv = target;
1751
1752 /*
1753 * A little HACK: 2nd bit is zero for all scsi read
1754 * commands and is set for all scsi write commands
1755 */
1756 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64:
1757 MBOXCMD_LREAD64 ;
1758
1759 /*
1760 * 6-byte READ(0x08) or WRITE(0x0A) cdb
1761 */
1762 if (scp->cmd_len == 6) {
1763 mbox->numsectors = (uint32_t)scp->cmnd[4];
1764 mbox->lba =
1765 ((uint32_t)scp->cmnd[1] << 16) |
1766 ((uint32_t)scp->cmnd[2] << 8) |
1767 (uint32_t)scp->cmnd[3];
1768
1769 mbox->lba &= 0x1FFFFF;
1770 }
1771
1772 /*
1773 * 10-byte READ(0x28) or WRITE(0x2A) cdb
1774 */
1775 else if (scp->cmd_len == 10) {
1776 mbox->numsectors =
1777 (uint32_t)scp->cmnd[8] |
1778 ((uint32_t)scp->cmnd[7] << 8);
1779 mbox->lba =
1780 ((uint32_t)scp->cmnd[2] << 24) |
1781 ((uint32_t)scp->cmnd[3] << 16) |
1782 ((uint32_t)scp->cmnd[4] << 8) |
1783 (uint32_t)scp->cmnd[5];
1784 }
1785
1786 /*
1787 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1788 */
1789 else if (scp->cmd_len == 12) {
1790 mbox->lba =
1791 ((uint32_t)scp->cmnd[2] << 24) |
1792 ((uint32_t)scp->cmnd[3] << 16) |
1793 ((uint32_t)scp->cmnd[4] << 8) |
1794 (uint32_t)scp->cmnd[5];
1795
1796 mbox->numsectors =
1797 ((uint32_t)scp->cmnd[6] << 24) |
1798 ((uint32_t)scp->cmnd[7] << 16) |
1799 ((uint32_t)scp->cmnd[8] << 8) |
1800 (uint32_t)scp->cmnd[9];
1801 }
1802 else {
1803 con_log(CL_ANN, (KERN_WARNING
1804 "megaraid: unsupported CDB length\n"));
1805
1806 megaraid_dealloc_scb(adapter, scb);
1807
1808 scp->result = (DID_ERROR << 16);
1809 return NULL;
1810 }
1811
1812 scb->dma_direction = scp->sc_data_direction;
1813
1814 // Calculate Scatter-Gather info
1815 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h;
1816 mbox->numsge = megaraid_mbox_mksgl(adapter,
1817 scb);
1818 mbox->xferaddr = 0xFFFFFFFF;
1819 mbox64->xferaddr_hi = 0;
1820
1821 return scb;
1822
1823 case RESERVE:
1824 case RELEASE:
1825 /*
1826 * Do we support clustering and is the support enabled
1827 */
1828 if (!adapter->ha) {
1829 scp->result = (DID_BAD_TARGET << 16);
1830 return NULL;
1831 }
1832
1833 /*
1834 * Allocate a SCB and initialize mailbox
1835 */
1836 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1837 scp->result = (DID_ERROR << 16);
1838 *busy = 1;
1839 return NULL;
1840 }
1841
1842 ccb = (mbox_ccb_t *)scb->ccb;
1843 scb->dev_channel = 0xFF;
1844 scb->dev_target = target;
1845 ccb->raw_mbox[0] = CLUSTER_CMD;
1846 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ?
1847 RESERVE_LD : RELEASE_LD;
1848
1849 ccb->raw_mbox[3] = target;
1850 scb->dma_direction = scp->sc_data_direction;
1851
1852 return scb;
1853
1854 default:
1855 scp->result = (DID_BAD_TARGET << 16);
1856 return NULL;
1857 }
1858 }
1859 else { // Passthru device commands
1860
1861 // Do not allow access to target id > 15 or LUN > 7
1862 if (target > 15 || SCP2LUN(scp) > 7) {
1863 scp->result = (DID_BAD_TARGET << 16);
1864 return NULL;
1865 }
1866
1867 // if fast load option was set and scan for last device is
1868 // over, reset the fast_load flag so that during a possible
1869 // next scan, devices can be made available
1870 if (rdev->fast_load && (target == 15) &&
1871 (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1872
1873 con_log(CL_ANN, (KERN_INFO
1874 "megaraid[%d]: physical device scan re-enabled\n",
1875 adapter->host->host_no));
1876 rdev->fast_load = 0;
1877 }
1878
1879 /*
1880 * Display the channel scan for physical devices
1881 */
1882 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1883
1884 ss = rdev->fast_load ? skip : scan;
1885
1886 con_log(CL_ANN, (KERN_INFO
1887 "scsi[%d]: %s scsi channel %d [Phy %d]",
1888 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1889 channel));
1890
1891 con_log(CL_ANN, (
1892 " for non-raid devices\n"));
1893
1894 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1895 }
1896
1897 // disable channel sweep if fast load option given
1898 if (rdev->fast_load) {
1899 scp->result = (DID_BAD_TARGET << 16);
1900 return NULL;
1901 }
1902
1903 // Allocate a SCB and initialize passthru
1904 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1905 scp->result = (DID_ERROR << 16);
1906 *busy = 1;
1907 return NULL;
1908 }
1909
1910 ccb = (mbox_ccb_t *)scb->ccb;
1911 scb->dev_channel = channel;
1912 scb->dev_target = target;
1913 scb->dma_direction = scp->sc_data_direction;
1914 mbox = ccb->mbox;
1915 mbox64 = ccb->mbox64;
1916
1917 // Does this firmware support extended CDBs
1918 if (adapter->max_cdb_sz == 16) {
1919 mbox->cmd = MBOXCMD_EXTPTHRU;
1920
1921 megaraid_mbox_prepare_epthru(adapter, scb, scp);
1922
1923 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h;
1924 mbox64->xferaddr_hi = 0;
1925 mbox->xferaddr = 0xFFFFFFFF;
1926 }
1927 else {
1928 mbox->cmd = MBOXCMD_PASSTHRU64;
1929
1930 megaraid_mbox_prepare_pthru(adapter, scb, scp);
1931
1932 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h;
1933 mbox64->xferaddr_hi = 0;
1934 mbox->xferaddr = 0xFFFFFFFF;
1935 }
1936 return scb;
1937 }
1938
1939 // NOT REACHED
1940}
1941
1942
1943/**
1944 * megaraid_mbox_runpendq - execute commands queued in the pending queue
1945 * @adapter : controller's soft state
a69b74d3 1946 * @scb_q : SCB to be queued in the pending list
1da177e4 1947 *
a69b74d3 1948 * Scan the pending list for commands which are not yet issued and try to
1da177e4
LT		 1949 * post to the controller. The SCB can be a null pointer, which would indicate
1950 * no SCB to be queue, just try to execute the ones in the pending list.
1951 *
1952 * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1953 * out from the head of the pending list. If it is successfully issued, the
1954 * next SCB is at the head now.
1955 */
1956static void
1957megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1958{
1959 scb_t *scb;
1960 unsigned long flags;
1961
1962 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1963
1964 if (scb_q) {
1965 scb_q->state = SCB_PENDQ;
1966 list_add_tail(&scb_q->list, &adapter->pend_list);
1967 }
1968
1969 // if the adapter in not in quiescent mode, post the commands to FW
1970 if (adapter->quiescent) {
1971 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1972 return;
1973 }
1974
1975 while (!list_empty(&adapter->pend_list)) {
1976
1977 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1978
1979 scb = list_entry(adapter->pend_list.next, scb_t, list);
1980
1981 // remove the scb from the pending list and try to
1982 // issue. If we are unable to issue it, put back in
1983 // the pending list and return
1984
1985 list_del_init(&scb->list);
1986
1987 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1988
1989 // if mailbox was busy, return SCB back to pending
1990 // list. Make sure to add at the head, since that's
1991 // where it would have been removed from
1992
1993 scb->state = SCB_ISSUED;
1994
1995 if (mbox_post_cmd(adapter, scb) != 0) {
1996
1997 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1998
1999 scb->state = SCB_PENDQ;
2000
2001 list_add(&scb->list, &adapter->pend_list);
2002
2003 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2004 flags);
2005
2006 return;
2007 }
2008
2009 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2010 }
2011
2012 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2013
2014
2015 return;
2016}
2017
2018
2019/**
2020 * megaraid_mbox_prepare_pthru - prepare a command for physical devices
a69b74d3
RD		 2021 * @adapter : pointer to controller's soft state
2022 * @scb : scsi control block
2023 * @scp : scsi command from the mid-layer
1da177e4 2024 *
a69b74d3 2025 * Prepare a command for the scsi physical devices.
1da177e4
LT		 2026 */
2027static void
2028megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
2029 struct scsi_cmnd *scp)
2030{
2031 mbox_ccb_t *ccb;
2032 mraid_passthru_t *pthru;
2033 uint8_t channel;
2034 uint8_t target;
2035
2036 ccb = (mbox_ccb_t *)scb->ccb;
2037 pthru = ccb->pthru;
2038 channel = scb->dev_channel;
2039 target = scb->dev_target;
2040
2041 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2042 pthru->timeout = 4;
2043 pthru->ars = 1;
2044 pthru->islogical = 0;
2045 pthru->channel = 0;
2046 pthru->target = (channel << 4) | target;
2047 pthru->logdrv = SCP2LUN(scp);
2048 pthru->reqsenselen = 14;
2049 pthru->cdblen = scp->cmd_len;
2050
2051 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2052
2053 if (scp->request_bufflen) {
2054 pthru->dataxferlen = scp->request_bufflen;
2055 pthru->dataxferaddr = ccb->sgl_dma_h;
2056 pthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2057 }
2058 else {
2059 pthru->dataxferaddr = 0;
2060 pthru->dataxferlen = 0;
2061 pthru->numsge = 0;
2062 }
2063 return;
2064}
2065
2066
2067/**
2068 * megaraid_mbox_prepare_epthru - prepare a command for physical devices
a69b74d3
RD		 2069 * @adapter : pointer to controller's soft state
2070 * @scb : scsi control block
2071 * @scp : scsi command from the mid-layer
1da177e4 2072 *
a69b74d3
RD		 2073 * Prepare a command for the scsi physical devices. This rountine prepares
2074 * commands for devices which can take extended CDBs (>10 bytes).
1da177e4
LT		 2075 */
2076static void
2077megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2078 struct scsi_cmnd *scp)
2079{
2080 mbox_ccb_t *ccb;
2081 mraid_epassthru_t *epthru;
2082 uint8_t channel;
2083 uint8_t target;
2084
2085 ccb = (mbox_ccb_t *)scb->ccb;
2086 epthru = ccb->epthru;
2087 channel = scb->dev_channel;
2088 target = scb->dev_target;
2089
2090 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2091 epthru->timeout = 4;
2092 epthru->ars = 1;
2093 epthru->islogical = 0;
2094 epthru->channel = 0;
2095 epthru->target = (channel << 4) | target;
2096 epthru->logdrv = SCP2LUN(scp);
2097 epthru->reqsenselen = 14;
2098 epthru->cdblen = scp->cmd_len;
2099
2100 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2101
2102 if (scp->request_bufflen) {
2103 epthru->dataxferlen = scp->request_bufflen;
2104 epthru->dataxferaddr = ccb->sgl_dma_h;
2105 epthru->numsge = megaraid_mbox_mksgl(adapter, scb);
2106 }
2107 else {
2108 epthru->dataxferaddr = 0;
2109 epthru->dataxferlen = 0;
2110 epthru->numsge = 0;
2111 }
2112 return;
2113}
2114
2115
2116/**
2117 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
a69b74d3 2118 * @adapter : controller's soft state
1da177e4 2119 *
a69b74d3 2120 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
1da177e4
LT		 2121 * completed command and put them on the completed list for later processing.
2122 *
2123 * Returns: 1 if the interrupt is valid, 0 otherwise
2124 */
858119e1 2125static int
1da177e4
LT		 2126megaraid_ack_sequence(adapter_t *adapter)
2127{
2128 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2129 mbox_t *mbox;
2130 scb_t *scb;
2131 uint8_t nstatus;
2132 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS];
2133 struct list_head clist;
2134 int handled;
2135 uint32_t dword;
2136 unsigned long flags;
2137 int i, j;
2138
2139
2140 mbox = raid_dev->mbox;
2141
2142 // move the SCBs from the firmware completed array to our local list
2143 INIT_LIST_HEAD(&clist);
2144
2145 // loop till F/W has more commands for us to complete
2146 handled = 0;
2147 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2148 do {
2149 /*
2150 * Check if a valid interrupt is pending. If found, force the
2151 * interrupt line low.
2152 */
2153 dword = RDOUTDOOR(raid_dev);
2154 if (dword != 0x10001234) break;
2155
2156 handled = 1;
2157
2158 WROUTDOOR(raid_dev, 0x10001234);
2159
2160 nstatus = 0;
2161 // wait for valid numstatus to post
2162 for (i = 0; i < 0xFFFFF; i++) {
2163 if (mbox->numstatus != 0xFF) {
2164 nstatus = mbox->numstatus;
2165 break;
2166 }
2167 rmb();
2168 }
2169 mbox->numstatus = 0xFF;
2170
2171 adapter->outstanding_cmds -= nstatus;
2172
2173 for (i = 0; i < nstatus; i++) {
2174
2175 // wait for valid command index to post
2176 for (j = 0; j < 0xFFFFF; j++) {
2177 if (mbox->completed[i] != 0xFF) break;
2178 rmb();
2179 }
2180 completed[i] = mbox->completed[i];
2181 mbox->completed[i] = 0xFF;
2182
2183 if (completed[i] == 0xFF) {
2184 con_log(CL_ANN, (KERN_CRIT
2185 "megaraid: command posting timed out\n"));
2186
2187 BUG();
2188 continue;
2189 }
2190
2191 // Get SCB associated with this command id
2192 if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2193 // a cmm command
2194 scb = adapter->uscb_list + (completed[i] -
2195 MBOX_MAX_SCSI_CMDS);
2196 }
2197 else {
2198 // an os command
2199 scb = adapter->kscb_list + completed[i];
2200 }
2201
2202 scb->status = mbox->status;
2203 list_add_tail(&scb->list, &clist);
2204 }
2205
2206 // Acknowledge interrupt
2207 WRINDOOR(raid_dev, 0x02);
2208
2209 } while(1);
2210
2211 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2212
2213
2214 // put the completed commands in the completed list. DPC would
2215 // complete these commands later
2216 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2217
2218 list_splice(&clist, &adapter->completed_list);
2219
2220 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2221
2222
2223 // schedule the DPC if there is some work for it
2224 if (handled)
2225 tasklet_schedule(&adapter->dpc_h);
2226
2227 return handled;
2228}
2229
2230
2231/**
2232 * megaraid_isr - isr for memory based mailbox based controllers
a69b74d3
RD		 2233 * @irq : irq
2234 * @devp : pointer to our soft state
1da177e4
LT		 2235 *
2236 * Interrupt service routine for memory-mapped mailbox controllers.
2237 */
2238static irqreturn_t
7d12e780 2239megaraid_isr(int irq, void *devp)
1da177e4
LT		 2240{
2241 adapter_t *adapter = devp;
2242 int handled;
2243
2244 handled = megaraid_ack_sequence(adapter);
2245
2246 /* Loop through any pending requests */
2247 if (!adapter->quiescent) {
2248 megaraid_mbox_runpendq(adapter, NULL);
2249 }
2250
2251 return IRQ_RETVAL(handled);
2252}
2253
2254
2255/**
2256 * megaraid_mbox_sync_scb - sync kernel buffers
2257 * @adapter : controller's soft state
2258 * @scb : pointer to the resource packet
2259 *
2260 * DMA sync if required.
2261 */
858119e1 2262static void
1da177e4
LT		 2263megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2264{
2265 mbox_ccb_t *ccb;
2266
2267 ccb = (mbox_ccb_t *)scb->ccb;
2268
2269 switch (scb->dma_type) {
2270
2271 case MRAID_DMA_WBUF:
2272 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2273 pci_dma_sync_single_for_cpu(adapter->pdev,
2274 ccb->buf_dma_h,
2275 scb->scp->request_bufflen,
2276 PCI_DMA_FROMDEVICE);
2277 }
2278
2279 pci_unmap_page(adapter->pdev, ccb->buf_dma_h,
2280 scb->scp->request_bufflen, scb->dma_direction);
2281
2282 break;
2283
2284 case MRAID_DMA_WSG:
2285 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2286 pci_dma_sync_sg_for_cpu(adapter->pdev,
2287 scb->scp->request_buffer,
2288 scb->scp->use_sg, PCI_DMA_FROMDEVICE);
2289 }
2290
2291 pci_unmap_sg(adapter->pdev, scb->scp->request_buffer,
2292 scb->scp->use_sg, scb->dma_direction);
2293
2294 break;
2295
2296 default:
2297 break;
2298 }
2299
2300 return;
2301}
2302
2303
2304/**
2305 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2306 * @devp : pointer to HBA soft state
2307 *
2308 * Pick up the commands from the completed list and send back to the owners.
2309 * This is a reentrant function and does not assume any locks are held while
2310 * it is being called.
2311 */
2312static void
2313megaraid_mbox_dpc(unsigned long devp)
2314{
2315 adapter_t *adapter = (adapter_t *)devp;
2316 mraid_device_t *raid_dev;
2317 struct list_head clist;
2318 struct scatterlist *sgl;
2319 scb_t *scb;
2320 scb_t *tmp;
2321 struct scsi_cmnd *scp;
2322 mraid_passthru_t *pthru;
2323 mraid_epassthru_t *epthru;
2324 mbox_ccb_t *ccb;
2325 int islogical;
2326 int pdev_index;
2327 int pdev_state;
2328 mbox_t *mbox;
2329 unsigned long flags;
2330 uint8_t c;
2331 int status;
c005fb4f 2332 uioc_t *kioc;
1da177e4
LT		 2333
2334
2335 if (!adapter) return;
2336
2337 raid_dev = ADAP2RAIDDEV(adapter);
2338
2339 // move the SCBs from the completed list to our local list
2340 INIT_LIST_HEAD(&clist);
2341
2342 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2343
2344 list_splice_init(&adapter->completed_list, &clist);
2345
2346 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2347
2348
2349 list_for_each_entry_safe(scb, tmp, &clist, list) {
2350
2351 status = scb->status;
2352 scp = scb->scp;
2353 ccb = (mbox_ccb_t *)scb->ccb;
2354 pthru = ccb->pthru;
2355 epthru = ccb->epthru;
2356 mbox = ccb->mbox;
2357
2358 // Make sure f/w has completed a valid command
2359 if (scb->state != SCB_ISSUED) {
2360 con_log(CL_ANN, (KERN_CRIT
2361 "megaraid critical err: invalid command %d:%d:%p\n",
2362 scb->sno, scb->state, scp));
2363 BUG();
2364 continue; // Must never happen!
2365 }
2366
2367 // check for the management command and complete it right away
2368 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2369 scb->state = SCB_FREE;
2370 scb->status = status;
2371
2372 // remove from local clist
2373 list_del_init(&scb->list);
2374
c005fb4f
JS		 2375 kioc = (uioc_t *)scb->gp;
2376 kioc->status = 0;
2377
1da177e4
LT		 2378 megaraid_mbox_mm_done(adapter, scb);
2379
2380 continue;
2381 }
2382
2383 // Was an abort issued for this command earlier
2384 if (scb->state & SCB_ABORT) {
2385 con_log(CL_ANN, (KERN_NOTICE
2386 "megaraid: aborted cmd %lx[%x] completed\n",
2387 scp->serial_number, scb->sno));
2388 }
2389
2390 /*
2391 * If the inquiry came of a disk drive which is not part of
2392 * any RAID array, expose it to the kernel. For this to be
2393 * enabled, user must set the "megaraid_expose_unconf_disks"
2394 * flag to 1 by specifying it on module parameter list.
2395 * This would enable data migration off drives from other
2396 * configurations.
2397 */
2398 islogical = MRAID_IS_LOGICAL(adapter, scp);
2399 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2400 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2401
2402 if (scp->use_sg) {
2403 sgl = (struct scatterlist *)
2404 scp->request_buffer;
2405
2406 if (sgl->page) {
2407 c = *(unsigned char *)
2408 (page_address((&sgl[0])->page) +
2409 (&sgl[0])->offset);
2410 }
2411 else {
2412 con_log(CL_ANN, (KERN_WARNING
2413 "megaraid mailbox: invalid sg:%d\n",
2414 __LINE__));
2415 c = 0;
2416 }
2417 }
2418 else {
2419 c = *(uint8_t *)scp->request_buffer;
2420 }
2421
2422 if ((c & 0x1F ) == TYPE_DISK) {
2423 pdev_index = (scb->dev_channel * 16) +
2424 scb->dev_target;
2425 pdev_state =
2426 raid_dev->pdrv_state[pdev_index] & 0x0F;
2427
2428 if (pdev_state == PDRV_ONLINE ||
2429 pdev_state == PDRV_FAILED ||
2430 pdev_state == PDRV_RBLD ||
2431 pdev_state == PDRV_HOTSPARE ||
2432 megaraid_expose_unconf_disks == 0) {
2433
2434 status = 0xF0;
2435 }
2436 }
2437 }
2438
2439 // Convert MegaRAID status to Linux error code
2440 switch (status) {
2441
2442 case 0x00:
2443
2444 scp->result = (DID_OK << 16);
2445 break;
2446
2447 case 0x02:
2448
2449 /* set sense_buffer and result fields */
2450 if (mbox->cmd == MBOXCMD_PASSTHRU ||
2451 mbox->cmd == MBOXCMD_PASSTHRU64) {
2452
2453 memcpy(scp->sense_buffer, pthru->reqsensearea,
2454 14);
2455
2456 scp->result = DRIVER_SENSE << 24 |
2457 DID_OK << 16 | CHECK_CONDITION << 1;
2458 }
2459 else {
2460 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2461
2462 memcpy(scp->sense_buffer,
2463 epthru->reqsensearea, 14);
2464
2465 scp->result = DRIVER_SENSE << 24 |
2466 DID_OK << 16 |
2467 CHECK_CONDITION << 1;
2468 } else {
2469 scp->sense_buffer[0] = 0x70;
2470 scp->sense_buffer[2] = ABORTED_COMMAND;
2471 scp->result = CHECK_CONDITION << 1;
2472 }
2473 }
2474 break;
2475
2476 case 0x08:
2477
2478 scp->result = DID_BUS_BUSY << 16 | status;
2479 break;
2480
2481 default:
2482
2483 /*
2484 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2485 * failed
2486 */
2487 if (scp->cmnd[0] == TEST_UNIT_READY) {
2488 scp->result = DID_ERROR << 16 |
2489 RESERVATION_CONFLICT << 1;
2490 }
2491 else
2492 /*
2493 * Error code returned is 1 if Reserve or Release
2494 * failed or the input parameter is invalid
2495 */
2496 if (status == 1 && (scp->cmnd[0] == RESERVE ||
2497 scp->cmnd[0] == RELEASE)) {
2498
2499 scp->result = DID_ERROR << 16 |
2500 RESERVATION_CONFLICT << 1;
2501 }
2502 else {
2503 scp->result = DID_BAD_TARGET << 16 | status;
2504 }
2505 }
2506
2507 // print a debug message for all failed commands
2508 if (status) {
2509 megaraid_mbox_display_scb(adapter, scb);
2510 }
2511
2512 // Free our internal resources and call the mid-layer callback
2513 // routine
2514 megaraid_mbox_sync_scb(adapter, scb);
2515
2516 // remove from local clist
2517 list_del_init(&scb->list);
2518
2519 // put back in free list
2520 megaraid_dealloc_scb(adapter, scb);
2521
2522 // send the scsi packet back to kernel
1da177e4 2523 scp->scsi_done(scp);
1da177e4
LT		 2524 }
2525
2526 return;
2527}
2528
2529
2530/**
2531 * megaraid_abort_handler - abort the scsi command
2532 * @scp : command to be aborted
2533 *
2534 * Abort a previous SCSI request. Only commands on the pending list can be
2535 * aborted. All the commands issued to the F/W must complete.
2536 **/
2537static int
f2c8dc40 2538megaraid_abort_handler(struct scsi_cmnd *scp)
1da177e4
LT		 2539{
2540 adapter_t *adapter;
2541 mraid_device_t *raid_dev;
2542 scb_t *scb;
2543 scb_t *tmp;
2544 int found;
2545 unsigned long flags;
2546 int i;
2547
2548
2549 adapter = SCP2ADAPTER(scp);
2550 raid_dev = ADAP2RAIDDEV(adapter);
2551
1da177e4
LT		 2552 con_log(CL_ANN, (KERN_WARNING
2553 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2554 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2555 SCP2TARGET(scp), SCP2LUN(scp)));
2556
2557 // If FW has stopped responding, simply return failure
2558 if (raid_dev->hw_error) {
2559 con_log(CL_ANN, (KERN_NOTICE
2560 "megaraid: hw error, not aborting\n"));
2561 return FAILED;
2562 }
2563
2564 // There might a race here, where the command was completed by the
2565 // firmware and now it is on the completed list. Before we could
2566 // complete the command to the kernel in dpc, the abort came.
2567 // Find out if this is the case to avoid the race.
2568 scb = NULL;
2569 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2570 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2571
2572 if (scb->scp == scp) { // Found command
2573
2574 list_del_init(&scb->list); // from completed list
2575
2576 con_log(CL_ANN, (KERN_WARNING
2577 "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2578 scp->serial_number, scb->sno,
2579 scb->dev_channel, scb->dev_target));
2580
2581 scp->result = (DID_ABORT << 16);
2582 scp->scsi_done(scp);
2583
2584 megaraid_dealloc_scb(adapter, scb);
2585
2586 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2587 flags);
2588
2589 return SUCCESS;
2590 }
2591 }
2592 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2593
2594
2595 // Find out if this command is still on the pending list. If it is and
2596 // was never issued, abort and return success. If the command is owned
2597 // by the firmware, we must wait for it to complete by the FW.
2598 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2599 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2600
2601 if (scb->scp == scp) { // Found command
2602
2603 list_del_init(&scb->list); // from pending list
2604
2605 ASSERT(!(scb->state & SCB_ISSUED));
2606
2607 con_log(CL_ANN, (KERN_WARNING
2608 "megaraid abort: %ld[%d:%d], driver owner\n",
2609 scp->serial_number, scb->dev_channel,
2610 scb->dev_target));
2611
2612 scp->result = (DID_ABORT << 16);
2613 scp->scsi_done(scp);
2614
2615 megaraid_dealloc_scb(adapter, scb);
2616
2617 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2618 flags);
2619
2620 return SUCCESS;
2621 }
2622 }
2623 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2624
2625
2626 // Check do we even own this command, in which case this would be
2627 // owned by the firmware. The only way to locate the FW scb is to
2628 // traverse through the list of all SCB, since driver does not
2629 // maintain these SCBs on any list
2630 found = 0;
f2c8dc40 2631 spin_lock_irq(&adapter->lock);
1da177e4
LT		 2632 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2633 scb = adapter->kscb_list + i;
2634
2635 if (scb->scp == scp) {
2636
2637 found = 1;
2638
2639 if (!(scb->state & SCB_ISSUED)) {
2640 con_log(CL_ANN, (KERN_WARNING
2641 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2642 scp->serial_number, scb->sno, scb->dev_channel,
2643 scb->dev_target));
2644 BUG();
2645 }
2646 else {
2647 con_log(CL_ANN, (KERN_WARNING
2648 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2649 scp->serial_number, scb->sno, scb->dev_channel,
2650 scb->dev_target));
2651 }
2652 }
2653 }
f2c8dc40 2654 spin_unlock_irq(&adapter->lock);
1da177e4
LT		 2655
2656 if (!found) {
2657 con_log(CL_ANN, (KERN_WARNING
2658 "megaraid abort: scsi cmd:%ld, do now own\n",
2659 scp->serial_number));
2660
2661 // FIXME: Should there be a callback for this command?
2662 return SUCCESS;
2663 }
2664
2665 // We cannot actually abort a command owned by firmware, return
2666 // failure and wait for reset. In host reset handler, we will find out
2667 // if the HBA is still live
2668 return FAILED;
2669}
2670
1da177e4
LT		 2671/**
2672 * megaraid_reset_handler - device reset hadler for mailbox based driver
2673 * @scp : reference command
2674 *
2675 * Reset handler for the mailbox based controller. First try to find out if
2676 * the FW is still live, in which case the outstanding commands counter mut go
2677 * down to 0. If that happens, also issue the reservation reset command to
2678 * relinquish (possible) reservations on the logical drives connected to this
a69b74d3 2679 * host.
1da177e4
LT		 2680 **/
2681static int
f2c8dc40 2682megaraid_reset_handler(struct scsi_cmnd *scp)
1da177e4
LT		 2683{
2684 adapter_t *adapter;
2685 scb_t *scb;
2686 scb_t *tmp;
2687 mraid_device_t *raid_dev;
2688 unsigned long flags;
2689 uint8_t raw_mbox[sizeof(mbox_t)];
2690 int rval;
2691 int recovery_window;
2692 int recovering;
2693 int i;
c005fb4f 2694 uioc_t *kioc;
1da177e4
LT		 2695
2696 adapter = SCP2ADAPTER(scp);
2697 raid_dev = ADAP2RAIDDEV(adapter);
2698
1da177e4
LT		 2699 // return failure if adapter is not responding
2700 if (raid_dev->hw_error) {
2701 con_log(CL_ANN, (KERN_NOTICE
2702 "megaraid: hw error, cannot reset\n"));
2703 return FAILED;
2704 }
2705
2706
2707 // Under exceptional conditions, FW can take up to 3 minutes to
2708 // complete command processing. Wait for additional 2 minutes for the
2709 // pending commands counter to go down to 0. If it doesn't, let the
2710 // controller be marked offline
2711 // Also, reset all the commands currently owned by the driver
2712 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2713 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
1da177e4
LT		 2714 list_del_init(&scb->list); // from pending list
2715
c005fb4f
JS		 2716 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2717 con_log(CL_ANN, (KERN_WARNING
2718 "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2719 scb->sno, scb->dev_channel, scb->dev_target));
1da177e4 2720
c005fb4f 2721 scb->status = -1;
1da177e4 2722
c005fb4f
JS		 2723 kioc = (uioc_t *)scb->gp;
2724 kioc->status = -EFAULT;
2725
2726 megaraid_mbox_mm_done(adapter, scb);
2727 } else {
2728 if (scb->scp == scp) { // Found command
2729 con_log(CL_ANN, (KERN_WARNING
2730 "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2731 scp->serial_number, scb->sno,
2732 scb->dev_channel, scb->dev_target));
2733 } else {
2734 con_log(CL_ANN, (KERN_WARNING
2735 "megaraid: IO packet with %d[%d:%d] being reset\n",
2736 scb->sno, scb->dev_channel, scb->dev_target));
2737 }
2738
2739 scb->scp->result = (DID_RESET << 16);
2740 scb->scp->scsi_done(scb->scp);
2741
2742 megaraid_dealloc_scb(adapter, scb);
2743 }
1da177e4
LT		 2744 }
2745 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2746
2747 if (adapter->outstanding_cmds) {
2748 con_log(CL_ANN, (KERN_NOTICE
2749 "megaraid: %d outstanding commands. Max wait %d sec\n",
c005fb4f
JS		 2750 adapter->outstanding_cmds,
2751 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
1da177e4
LT		 2752 }
2753
1da177e4
LT		 2754 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2755
2756 recovering = adapter->outstanding_cmds;
2757
c005fb4f 2758 for (i = 0; i < recovery_window; i++) {
1da177e4
LT		 2759
2760 megaraid_ack_sequence(adapter);
2761
2762 // print a message once every 5 seconds only
2763 if (!(i % 5)) {
2764 con_log(CL_ANN, (
2765 "megaraid mbox: Wait for %d commands to complete:%d\n",
2766 adapter->outstanding_cmds,
c005fb4f 2767 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
1da177e4
LT		 2768 }
2769
2770 // bailout if no recovery happended in reset time
c005fb4f 2771 if (adapter->outstanding_cmds == 0) {
1da177e4
LT		 2772 break;
2773 }
2774
2775 msleep(1000);
2776 }
2777
f2c8dc40 2778 spin_lock(&adapter->lock);
1da177e4
LT		 2779
2780 // If still outstanding commands, bail out
2781 if (adapter->outstanding_cmds) {
2782 con_log(CL_ANN, (KERN_WARNING
2783 "megaraid mbox: critical hardware error!\n"));
2784
2785 raid_dev->hw_error = 1;
2786
f2c8dc40
CH		 2787 rval = FAILED;
2788 goto out;
1da177e4
LT		 2789 }
2790 else {
2791 con_log(CL_ANN, (KERN_NOTICE
2792 "megaraid mbox: reset sequence completed sucessfully\n"));
2793 }
2794
2795
2796 // If the controller supports clustering, reset reservations
f2c8dc40
CH		 2797 if (!adapter->ha) {
2798 rval = SUCCESS;
2799 goto out;
2800 }
1da177e4
LT		 2801
2802 // clear reservations if any
2803 raw_mbox[0] = CLUSTER_CMD;
2804 raw_mbox[2] = RESET_RESERVATIONS;
2805
2806 rval = SUCCESS;
2807 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2808 con_log(CL_ANN,
2809 (KERN_INFO "megaraid: reservation reset\n"));
2810 }
2811 else {
2812 rval = FAILED;
2813 con_log(CL_ANN, (KERN_WARNING
2814 "megaraid: reservation reset failed\n"));
2815 }
2816
f2c8dc40
CH		 2817 out:
2818 spin_unlock_irq(&adapter->lock);
1da177e4
LT		 2819 return rval;
2820}
2821
1da177e4
LT		 2822/*
2823 * START: internal commands library
2824 *
2825 * This section of the driver has the common routine used by the driver and
2826 * also has all the FW routines
2827 */
2828
2829/**
2830 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
a69b74d3
RD		 2831 * @adapter : controller's soft state
2832 * @raw_mbox : the mailbox
1da177e4
LT		 2833 *
2834 * Issue a scb in synchronous and non-interrupt mode for mailbox based
a69b74d3 2835 * controllers.
1da177e4
LT		 2836 */
2837static int
2838mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2839{
2840 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2841 mbox64_t *mbox64;
2842 mbox_t *mbox;
2843 uint8_t status;
2844 int i;
2845
2846
2847 mbox64 = raid_dev->mbox64;
2848 mbox = raid_dev->mbox;
2849
2850 /*
2851 * Wait until mailbox is free
2852 */
2853 if (megaraid_busywait_mbox(raid_dev) != 0)
2854 goto blocked_mailbox;
2855
2856 /*
2857 * Copy mailbox data into host structure
2858 */
2859 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2860 mbox->cmdid = 0xFE;
2861 mbox->busy = 1;
2862 mbox->poll = 0;
2863 mbox->ack = 0;
2864 mbox->numstatus = 0xFF;
2865 mbox->status = 0xFF;
2866
2867 wmb();
2868 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2869
2870 // wait for maximum 1 second for status to post. If the status is not
2871 // available within 1 second, assume FW is initializing and wait
2872 // for an extended amount of time
2873 if (mbox->numstatus == 0xFF) { // status not yet available
53b3531b 2874 udelay(25);
1da177e4
LT		 2875
2876 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2877 rmb();
2878 msleep(1);
2879 }
2880
2881
2882 if (i == 1000) {
2883 con_log(CL_ANN, (KERN_NOTICE
2884 "megaraid mailbox: wait for FW to boot "));
2885
2886 for (i = 0; (mbox->numstatus == 0xFF) &&
2887 (i < MBOX_RESET_WAIT); i++) {
2888 rmb();
2889 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2890 MBOX_RESET_WAIT - i));
2891 msleep(1000);
2892 }
2893
2894 if (i == MBOX_RESET_WAIT) {
2895
2896 con_log(CL_ANN, (
2897 "\nmegaraid mailbox: status not available\n"));
2898
2899 return -1;
2900 }
2901 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2902 }
2903 }
2904
2905 // wait for maximum 1 second for poll semaphore
2906 if (mbox->poll != 0x77) {
2907 udelay(25);
2908
2909 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2910 rmb();
2911 msleep(1);
2912 }
2913
2914 if (i == 1000) {
2915 con_log(CL_ANN, (KERN_WARNING
2916 "megaraid mailbox: could not get poll semaphore\n"));
2917 return -1;
2918 }
2919 }
2920
2921 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2922 wmb();
2923
2924 // wait for maximum 1 second for acknowledgement
2925 if (RDINDOOR(raid_dev) & 0x2) {
2926 udelay(25);
2927
2928 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2929 rmb();
2930 msleep(1);
2931 }
2932
2933 if (i == 1000) {
2934 con_log(CL_ANN, (KERN_WARNING
2935 "megaraid mailbox: could not acknowledge\n"));
2936 return -1;
2937 }
2938 }
2939 mbox->poll = 0;
2940 mbox->ack = 0x77;
2941
2942 status = mbox->status;
2943
2944 // invalidate the completed command id array. After command
2945 // completion, firmware would write the valid id.
2946 mbox->numstatus = 0xFF;
2947 mbox->status = 0xFF;
2948 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2949 mbox->completed[i] = 0xFF;
2950 }
2951
2952 return status;
2953
2954blocked_mailbox:
2955
2956 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2957 return -1;
2958}
2959
2960
2961/**
2962 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
a69b74d3
RD		 2963 * @adapter : controller's soft state
2964 * @raw_mbox : the mailbox
1da177e4
LT		 2965 *
2966 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2967 * controllers. This is a faster version of the synchronous command and
a69b74d3 2968 * therefore can be called in interrupt-context as well.
1da177e4
LT		 2969 */
2970static int
2971mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2972{
2973 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
2974 mbox_t *mbox;
2975 long i;
2976
2977
2978 mbox = raid_dev->mbox;
2979
2980 // return immediately if the mailbox is busy
2981 if (mbox->busy) return -1;
2982
2983 // Copy mailbox data into host structure
2984 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2985 mbox->cmdid = 0xFE;
2986 mbox->busy = 1;
2987 mbox->poll = 0;
2988 mbox->ack = 0;
2989 mbox->numstatus = 0xFF;
2990 mbox->status = 0xFF;
2991
2992 wmb();
2993 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2994
c005fb4f 2995 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
1da177e4 2996 if (mbox->numstatus != 0xFF) break;
ed7e8ef7 2997 rmb();
c005fb4f 2998 udelay(MBOX_SYNC_DELAY_200);
1da177e4
LT		 2999 }
3000
c005fb4f 3001 if (i == MBOX_SYNC_WAIT_CNT) {
1da177e4
LT		 3002 // We may need to re-calibrate the counter
3003 con_log(CL_ANN, (KERN_CRIT
3004 "megaraid: fast sync command timed out\n"));
3005 }
3006
3007 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
3008 wmb();
3009
3010 return mbox->status;
3011}
3012
3013
3014/**
3015 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
a69b74d3 3016 * @raid_dev : RAID device (HBA) soft state
1da177e4 3017 *
a69b74d3
RD		 3018 * Wait until the controller's mailbox is available to accept more commands.
3019 * Wait for at most 1 second.
1da177e4
LT		 3020 */
3021static int
3022megaraid_busywait_mbox(mraid_device_t *raid_dev)
3023{
3024 mbox_t *mbox = raid_dev->mbox;
3025 int i = 0;
3026
3027 if (mbox->busy) {
3028 udelay(25);
3029 for (i = 0; mbox->busy && i < 1000; i++)
3030 msleep(1);
3031 }
3032
3033 if (i < 1000) return 0;
3034 else return -1;
3035}
3036
3037
3038/**
3039 * megaraid_mbox_product_info - some static information about the controller
a69b74d3 3040 * @adapter : our soft state
1da177e4 3041 *
a69b74d3 3042 * Issue commands to the controller to grab some parameters required by our
1da177e4
LT		 3043 * caller.
3044 */
3045static int
3046megaraid_mbox_product_info(adapter_t *adapter)
3047{
3048 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3049 mbox_t *mbox;
3050 uint8_t raw_mbox[sizeof(mbox_t)];
3051 mraid_pinfo_t *pinfo;
3052 dma_addr_t pinfo_dma_h;
3053 mraid_inquiry3_t *mraid_inq3;
3054 int i;
3055
3056
3057 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3058 mbox = (mbox_t *)raw_mbox;
3059
3060 /*
3061 * Issue an ENQUIRY3 command to find out certain adapter parameters,
3062 * e.g., max channels, max commands etc.
3063 */
3064 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3065 &pinfo_dma_h);
3066
3067 if (pinfo == NULL) {
3068 con_log(CL_ANN, (KERN_WARNING
3069 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3070 __LINE__));
3071
3072 return -1;
3073 }
3074 memset(pinfo, 0, sizeof(mraid_pinfo_t));
3075
3076 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3077 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3078
3079 raw_mbox[0] = FC_NEW_CONFIG;
3080 raw_mbox[2] = NC_SUBOP_ENQUIRY3;
3081 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
3082
3083 // Issue the command
3084 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3085
3086 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3087
3088 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3089 pinfo, pinfo_dma_h);
3090
3091 return -1;
3092 }
3093
3094 /*
3095 * Collect information about state of each physical drive
3096 * attached to the controller. We will expose all the disks
3097 * which are not part of RAID
3098 */
3099 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3100 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3101 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3102 }
3103
3104 /*
3105 * Get product info for information like number of channels,
3106 * maximum commands supported.
3107 */
3108 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3109 mbox->xferaddr = (uint32_t)pinfo_dma_h;
3110
3111 raw_mbox[0] = FC_NEW_CONFIG;
3112 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3113
3114 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3115
3116 con_log(CL_ANN, (KERN_WARNING
3117 "megaraid: product info failed\n"));
3118
3119 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3120 pinfo, pinfo_dma_h);
3121
3122 return -1;
3123 }
3124
3125 /*
3126 * Setup some parameters for host, as required by our caller
3127 */
3128 adapter->max_channel = pinfo->nchannels;
3129
3130 /*
3131 * we will export all the logical drives on a single channel.
3132 * Add 1 since inquires do not come for inititor ID
3133 */
3134 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1;
3135 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices
3136
3137 /*
3138 * These are the maximum outstanding commands for the scsi-layer
3139 */
3140 adapter->max_cmds = MBOX_MAX_SCSI_CMDS;
3141
3142 memset(adapter->fw_version, 0, VERSION_SIZE);
3143 memset(adapter->bios_version, 0, VERSION_SIZE);
3144
3145 memcpy(adapter->fw_version, pinfo->fw_version, 4);
3146 adapter->fw_version[4] = 0;
3147
3148 memcpy(adapter->bios_version, pinfo->bios_version, 4);
3149 adapter->bios_version[4] = 0;
3150
3151 con_log(CL_ANN, (KERN_NOTICE
3152 "megaraid: fw version:[%s] bios version:[%s]\n",
3153 adapter->fw_version, adapter->bios_version));
3154
3155 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3156 pinfo_dma_h);
3157
3158 return 0;
3159}
3160
3161
3162
3163/**
3164 * megaraid_mbox_extended_cdb - check for support for extended CDBs
a69b74d3 3165 * @adapter : soft state for the controller
1da177e4 3166 *
a69b74d3
RD		 3167 * This routine check whether the controller in question supports extended
3168 * ( > 10 bytes ) CDBs.
1da177e4
LT		 3169 */
3170static int
3171megaraid_mbox_extended_cdb(adapter_t *adapter)
3172{
3173 mbox_t *mbox;
3174 uint8_t raw_mbox[sizeof(mbox_t)];
3175 int rval;
3176
3177 mbox = (mbox_t *)raw_mbox;
3178
3179 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3180 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3181
3182 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3183
3184 raw_mbox[0] = MAIN_MISC_OPCODE;
3185 raw_mbox[2] = SUPPORT_EXT_CDB;
3186
3187 /*
3188 * Issue the command
3189 */
3190 rval = 0;
3191 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3192 rval = -1;
3193 }
3194
3195 return rval;
3196}
3197
3198
3199/**
3200 * megaraid_mbox_support_ha - Do we support clustering
a69b74d3
RD		 3201 * @adapter : soft state for the controller
3202 * @init_id : ID of the initiator
1da177e4
LT		 3203 *
3204 * Determine if the firmware supports clustering and the ID of the initiator.
3205 */
3206static int
3207megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3208{
3209 mbox_t *mbox;
3210 uint8_t raw_mbox[sizeof(mbox_t)];
3211 int rval;
3212
3213
3214 mbox = (mbox_t *)raw_mbox;
3215
3216 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3217
3218 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3219
3220 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3221
3222 raw_mbox[0] = GET_TARGET_ID;
3223
3224 // Issue the command
3225 *init_id = 7;
3226 rval = -1;
3227 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3228
3229 *init_id = *(uint8_t *)adapter->ibuf;
3230
3231 con_log(CL_ANN, (KERN_INFO
3232 "megaraid: cluster firmware, initiator ID: %d\n",
3233 *init_id));
3234
3235 rval = 0;
3236 }
3237
3238 return rval;
3239}
3240
3241
3242/**
3243 * megaraid_mbox_support_random_del - Do we support random deletion
a69b74d3 3244 * @adapter : soft state for the controller
1da177e4 3245 *
a69b74d3 3246 * Determine if the firmware supports random deletion.
1da177e4
LT		 3247 * Return: 1 is operation supported, 0 otherwise
3248 */
3249static int
3250megaraid_mbox_support_random_del(adapter_t *adapter)
3251{
3252 mbox_t *mbox;
3253 uint8_t raw_mbox[sizeof(mbox_t)];
3254 int rval;
3255
3256
3257 mbox = (mbox_t *)raw_mbox;
3258
3259 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3260
3261 raw_mbox[0] = FC_DEL_LOGDRV;
3262 raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3263
3264 // Issue the command
3265 rval = 0;
3266 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3267
3268 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3269
3270 rval = 1;
3271 }
3272
3273 return rval;
3274}
3275
3276
3277/**
3278 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
a69b74d3 3279 * @adapter : soft state for the controller
1da177e4
LT		 3280 *
3281 * Find out the maximum number of scatter-gather elements supported by the
a69b74d3 3282 * firmware.
1da177e4
LT		 3283 */
3284static int
3285megaraid_mbox_get_max_sg(adapter_t *adapter)
3286{
3287 mbox_t *mbox;
3288 uint8_t raw_mbox[sizeof(mbox_t)];
3289 int nsg;
3290
3291
3292 mbox = (mbox_t *)raw_mbox;
3293
3294 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3295
3296 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3297
3298 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3299
3300 raw_mbox[0] = MAIN_MISC_OPCODE;
3301 raw_mbox[2] = GET_MAX_SG_SUPPORT;
3302
3303 // Issue the command
3304 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3305 nsg = *(uint8_t *)adapter->ibuf;
3306 }
3307 else {
3308 nsg = MBOX_DEFAULT_SG_SIZE;
3309 }
3310
3311 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3312
3313 return nsg;
3314}
3315
3316
3317/**
3318 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
a69b74d3 3319 * @adapter : soft state for the controller
1da177e4 3320 *
a69b74d3
RD		 3321 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3322 * can be exported as regular SCSI channels.
1da177e4
LT		 3323 */
3324static void
3325megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3326{
3327 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3328 mbox_t *mbox;
3329 uint8_t raw_mbox[sizeof(mbox_t)];
3330
3331
3332 mbox = (mbox_t *)raw_mbox;
3333
3334 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3335
3336 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3337
3338 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3339
3340 raw_mbox[0] = CHNL_CLASS;
3341 raw_mbox[2] = GET_CHNL_CLASS;
3342
3343 // Issue the command. If the command fails, all channels are RAID
3344 // channels
3345 raid_dev->channel_class = 0xFF;
3346 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3347 raid_dev->channel_class = *(uint8_t *)adapter->ibuf;
3348 }
3349
3350 return;
3351}
3352
3353
3354/**
3355 * megaraid_mbox_flush_cache - flush adapter and disks cache
a69b74d3 3356 * @adapter : soft state for the controller
1da177e4 3357 *
a69b74d3 3358 * Flush adapter cache followed by disks cache.
1da177e4
LT		 3359 */
3360static void
3361megaraid_mbox_flush_cache(adapter_t *adapter)
3362{
3363 mbox_t *mbox;
3364 uint8_t raw_mbox[sizeof(mbox_t)];
3365
3366
3367 mbox = (mbox_t *)raw_mbox;
3368
3369 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3370
3371 raw_mbox[0] = FLUSH_ADAPTER;
3372
3373 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3374 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3375 }
3376
3377 raw_mbox[0] = FLUSH_SYSTEM;
3378
3379 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3380 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3381 }
3382
3383 return;
3384}
3385
3386
cd96d96f
SP		 3387/**
3388 * megaraid_mbox_fire_sync_cmd - fire the sync cmd
a69b74d3 3389 * @adapter : soft state for the controller
cd96d96f 3390 *
a69b74d3 3391 * Clears the pending cmds in FW and reinits its RAID structs.
cd96d96f
SP		 3392 */
3393static int
3394megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3395{
3396 mbox_t *mbox;
3397 uint8_t raw_mbox[sizeof(mbox_t)];
3398 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3399 mbox64_t *mbox64;
3400 int status = 0;
3401 int i;
3402 uint32_t dword;
3403
3404 mbox = (mbox_t *)raw_mbox;
3405
3406 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3407
3408 raw_mbox[0] = 0xFF;
3409
3410 mbox64 = raid_dev->mbox64;
3411 mbox = raid_dev->mbox;
3412
3413 /* Wait until mailbox is free */
3414 if (megaraid_busywait_mbox(raid_dev) != 0) {
3415 status = 1;
3416 goto blocked_mailbox;
3417 }
3418
3419 /* Copy mailbox data into host structure */
3420 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3421 mbox->cmdid = 0xFE;
3422 mbox->busy = 1;
3423 mbox->poll = 0;
3424 mbox->ack = 0;
3425 mbox->numstatus = 0;
3426 mbox->status = 0;
3427
3428 wmb();
3429 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3430
3431 /* Wait for maximum 1 min for status to post.
3432 * If the Firmware SUPPORTS the ABOVE COMMAND,
3433 * mbox->cmd will be set to 0
3434 * else
3435 * the firmware will reject the command with
3436 * mbox->numstatus set to 1
3437 */
3438
3439 i = 0;
3440 status = 0;
3441 while (!mbox->numstatus && mbox->cmd == 0xFF) {
3442 rmb();
3443 msleep(1);
3444 i++;
3445 if (i > 1000 * 60) {
3446 status = 1;
3447 break;
3448 }
3449 }
3450 if (mbox->numstatus == 1)
3451 status = 1; /*cmd not supported*/
3452
3453 /* Check for interrupt line */
3454 dword = RDOUTDOOR(raid_dev);
3455 WROUTDOOR(raid_dev, dword);
3456 WRINDOOR(raid_dev,2);
3457
3458 return status;
3459
3460blocked_mailbox:
3461 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3462 return status;
3463}
3464
1da177e4
LT		 3465/**
3466 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
a69b74d3
RD		 3467 * @adapter : controller's soft state
3468 * @scb : SCB to be displayed
3469 * @level : debug level for console print
1da177e4
LT		 3470 *
3471 * Diplay information about the given SCB iff the current debug level is
a69b74d3 3472 * verbose.
1da177e4
LT		 3473 */
3474static void
3475megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3476{
3477 mbox_ccb_t *ccb;
3478 struct scsi_cmnd *scp;
3479 mbox_t *mbox;
3480 int level;
3481 int i;
3482
3483
3484 ccb = (mbox_ccb_t *)scb->ccb;
3485 scp = scb->scp;
3486 mbox = ccb->mbox;
3487
3488 level = CL_DLEVEL3;
3489
3490 con_log(level, (KERN_NOTICE
3491 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3492 mbox->cmd, scb->sno));
3493
3494 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3495 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3496 mbox->numsge));
3497
3498 if (!scp) return;
3499
3500 con_log(level, (KERN_NOTICE "scsi cmnd: "));
3501
3502 for (i = 0; i < scp->cmd_len; i++) {
3503 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3504 }
3505
3506 con_log(level, ("\n"));
3507
3508 return;
3509}
3510
3511
3512/**
3513 * megaraid_mbox_setup_device_map - manage device ids
3514 * @adapter : Driver's soft state
3515 *
3516 * Manange the device ids to have an appropraite mapping between the kernel
3517 * scsi addresses and megaraid scsi and logical drive addresses. We export
3518 * scsi devices on their actual addresses, whereas the logical drives are
3519 * exported on a virtual scsi channel.
a69b74d3 3520 */
1da177e4
LT		 3521static void
3522megaraid_mbox_setup_device_map(adapter_t *adapter)
3523{
3524 uint8_t c;
3525 uint8_t t;
3526
3527 /*
3528 * First fill the values on the logical drive channel
3529 */
3530 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3531 adapter->device_ids[adapter->max_channel][t] =
3532 (t < adapter->init_id) ? t : t - 1;
3533
3534 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3535
3536 /*
3537 * Fill the values on the physical devices channels
3538 */
3539 for (c = 0; c < adapter->max_channel; c++)
3540 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3541 adapter->device_ids[c][t] = (c << 8) | t;
3542}
3543
3544
3545/*
3546 * END: internal commands library
3547 */
3548
3549/*
3550 * START: Interface for the common management module
3551 *
3552 * This is the module, which interfaces with the common mangement module to
3553 * provide support for ioctl and sysfs
3554 */
3555
3556/**
3557 * megaraid_cmm_register - register with the mangement module
a69b74d3 3558 * @adapter : HBA soft state
1da177e4
LT		 3559 *
3560 * Register with the management module, which allows applications to issue
3561 * ioctl calls to the drivers. This interface is used by the management module
3562 * to setup sysfs support as well.
3563 */
3564static int
3565megaraid_cmm_register(adapter_t *adapter)
3566{
3567 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3568 mraid_mmadp_t adp;
3569 scb_t *scb;
3570 mbox_ccb_t *ccb;
3571 int rval;
3572 int i;
3573
3574 // Allocate memory for the base list of scb for management module.
3575 adapter->uscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_USER_CMDS,
3576 GFP_KERNEL);
3577
3578 if (adapter->uscb_list == NULL) {
3579 con_log(CL_ANN, (KERN_WARNING
3580 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3581 __LINE__));
3582 return -1;
3583 }
3584 memset(adapter->uscb_list, 0, sizeof(scb_t) * MBOX_MAX_USER_CMDS);
3585
3586
3587 // Initialize the synchronization parameters for resources for
3588 // commands for management module
3589 INIT_LIST_HEAD(&adapter->uscb_pool);
3590
3591 spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3592
3593
3594
3595 // link all the packets. Note, CCB for commands, coming from the
3596 // commom management module, mailbox physical address are already
3597 // setup by it. We just need placeholder for that in our local command
3598 // control blocks
3599 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3600
3601 scb = adapter->uscb_list + i;
3602 ccb = raid_dev->uccb_list + i;
3603
3604 scb->ccb = (caddr_t)ccb;
3605 ccb->mbox64 = raid_dev->umbox64 + i;
3606 ccb->mbox = &ccb->mbox64->mbox32;
3607 ccb->raw_mbox = (uint8_t *)ccb->mbox;
3608
3609 scb->gp = 0;
3610
3611 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3612 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3613 scb->sno = i + MBOX_MAX_SCSI_CMDS;
3614
3615 scb->scp = NULL;
3616 scb->state = SCB_FREE;
3617 scb->dma_direction = PCI_DMA_NONE;
3618 scb->dma_type = MRAID_DMA_NONE;
3619 scb->dev_channel = -1;
3620 scb->dev_target = -1;
3621
3622 // put scb in the free pool
3623 list_add_tail(&scb->list, &adapter->uscb_pool);
3624 }
3625
3626 adp.unique_id = adapter->unique_id;
3627 adp.drvr_type = DRVRTYPE_MBOX;
3628 adp.drvr_data = (unsigned long)adapter;
3629 adp.pdev = adapter->pdev;
3630 adp.issue_uioc = megaraid_mbox_mm_handler;
c005fb4f 3631 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
1da177e4
LT		 3632 adp.max_kioc = MBOX_MAX_USER_CMDS;
3633
3634 if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3635
3636 con_log(CL_ANN, (KERN_WARNING
3637 "megaraid mbox: did not register with CMM\n"));
3638
3639 kfree(adapter->uscb_list);
3640 }
3641
3642 return rval;
3643}
3644
3645
3646/**
3647 * megaraid_cmm_unregister - un-register with the mangement module
a69b74d3 3648 * @adapter : HBA soft state
1da177e4
LT		 3649 *
3650 * Un-register with the management module.
3651 * FIXME: mgmt module must return failure for unregister if it has pending
a69b74d3 3652 * commands in LLD.
1da177e4
LT		 3653 */
3654static int
3655megaraid_cmm_unregister(adapter_t *adapter)
3656{
3657 kfree(adapter->uscb_list);
3658 mraid_mm_unregister_adp(adapter->unique_id);
3659 return 0;
3660}
3661
3662
3663/**
3664 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
a69b74d3
RD		 3665 * @drvr_data : LLD specific data
3666 * @kioc : CMM interface packet
3667 * @action : command action
1da177e4
LT		 3668 *
3669 * This routine is invoked whenever the Common Mangement Module (CMM) has a
3670 * command for us. The 'action' parameter specifies if this is a new command
3671 * or otherwise.
3672 */
3673static int
3674megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3675{
3676 adapter_t *adapter;
3677
3678 if (action != IOCTL_ISSUE) {
3679 con_log(CL_ANN, (KERN_WARNING
3680 "megaraid: unsupported management action:%#2x\n",
3681 action));
3682 return (-ENOTSUPP);
3683 }
3684
3685 adapter = (adapter_t *)drvr_data;
3686
3687 // make sure this adapter is not being detached right now.
3688 if (atomic_read(&adapter->being_detached)) {
3689 con_log(CL_ANN, (KERN_WARNING
3690 "megaraid: reject management request, detaching\n"));
3691 return (-ENODEV);
3692 }
3693
3694 switch (kioc->opcode) {
3695
3696 case GET_ADAP_INFO:
3697
3698 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *)
3699 (unsigned long)kioc->buf_vaddr);
3700
3701 kioc->done(kioc);
3702
3703 return kioc->status;
3704
3705 case MBOX_CMD:
3706
3707 return megaraid_mbox_mm_command(adapter, kioc);
3708
3709 default:
3710 kioc->status = (-EINVAL);
3711 kioc->done(kioc);
3712 return (-EINVAL);
3713 }
3714
3715 return 0; // not reached
3716}
3717
3718/**
3719 * megaraid_mbox_mm_command - issues commands routed through CMM
a69b74d3
RD		 3720 * @adapter : HBA soft state
3721 * @kioc : management command packet
1da177e4
LT		 3722 *
3723 * Issues commands, which are routed through the management module.
3724 */
3725static int
3726megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3727{
3728 struct list_head *head = &adapter->uscb_pool;
3729 mbox64_t *mbox64;
3730 uint8_t *raw_mbox;
3731 scb_t *scb;
3732 mbox_ccb_t *ccb;
3733 unsigned long flags;
3734
3735 // detach one scb from free pool
3736 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3737
3738 if (list_empty(head)) { // should never happen because of CMM
3739
3740 con_log(CL_ANN, (KERN_WARNING
3741 "megaraid mbox: bug in cmm handler, lost resources\n"));
3742
3743 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3744
3745 return (-EINVAL);
3746 }
3747
3748 scb = list_entry(head->next, scb_t, list);
3749 list_del_init(&scb->list);
3750
3751 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3752
3753 scb->state = SCB_ACTIVE;
3754 scb->dma_type = MRAID_DMA_NONE;
3755 scb->dma_direction = PCI_DMA_NONE;
3756
3757 ccb = (mbox_ccb_t *)scb->ccb;
3758 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3759 raw_mbox = (uint8_t *)&mbox64->mbox32;
3760
3761 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3762
3763 scb->gp = (unsigned long)kioc;
3764
3765 /*
3766 * If it is a logdrv random delete operation, we have to wait till
3767 * there are no outstanding cmds at the fw and then issue it directly
3768 */
3769 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3770
3771 if (wait_till_fw_empty(adapter)) {
3772 con_log(CL_ANN, (KERN_NOTICE
3773 "megaraid mbox: LD delete, timed out\n"));
3774
3775 kioc->status = -ETIME;
3776
3777 scb->status = -1;
3778
3779 megaraid_mbox_mm_done(adapter, scb);
3780
3781 return (-ETIME);
3782 }
3783
3784 INIT_LIST_HEAD(&scb->list);
3785
3786 scb->state = SCB_ISSUED;
3787 if (mbox_post_cmd(adapter, scb) != 0) {
3788
3789 con_log(CL_ANN, (KERN_NOTICE
3790 "megaraid mbox: LD delete, mailbox busy\n"));
3791
3792 kioc->status = -EBUSY;
3793
3794 scb->status = -1;
3795
3796 megaraid_mbox_mm_done(adapter, scb);
3797
3798 return (-EBUSY);
3799 }
3800
3801 return 0;
3802 }
3803
3804 // put the command on the pending list and execute
3805 megaraid_mbox_runpendq(adapter, scb);
3806
3807 return 0;
3808}
3809
3810
3811static int
3812wait_till_fw_empty(adapter_t *adapter)
3813{
3814 unsigned long flags = 0;
3815 int i;
3816
3817
3818 /*
3819 * Set the quiescent flag to stop issuing cmds to FW.
3820 */
f2c8dc40 3821 spin_lock_irqsave(&adapter->lock, flags);
1da177e4 3822 adapter->quiescent++;
f2c8dc40 3823 spin_unlock_irqrestore(&adapter->lock, flags);
1da177e4
LT		 3824
3825 /*
3826 * Wait till there are no more cmds outstanding at FW. Try for at most
3827 * 60 seconds
3828 */
3829 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3830 con_log(CL_DLEVEL1, (KERN_INFO
3831 "megaraid: FW has %d pending commands\n",
3832 adapter->outstanding_cmds));
3833
3834 msleep(1000);
3835 }
3836
3837 return adapter->outstanding_cmds;
3838}
3839
3840
3841/**
3842 * megaraid_mbox_mm_done - callback for CMM commands
3843 * @adapter : HBA soft state
3844 * @scb : completed command
3845 *
3846 * Callback routine for internal commands originated from the management
3847 * module.
3848 */
3849static void
3850megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3851{
3852 uioc_t *kioc;
3853 mbox64_t *mbox64;
3854 uint8_t *raw_mbox;
3855 unsigned long flags;
3856
3857 kioc = (uioc_t *)scb->gp;
1da177e4
LT		 3858 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3859 mbox64->mbox32.status = scb->status;
3860 raw_mbox = (uint8_t *)&mbox64->mbox32;
3861
3862
3863 // put scb in the free pool
3864 scb->state = SCB_FREE;
3865 scb->scp = NULL;
3866
3867 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3868
3869 list_add(&scb->list, &adapter->uscb_pool);
3870
3871 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3872
3873 // if a delete logical drive operation succeeded, restart the
3874 // controller
3875 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3876
3877 adapter->quiescent--;
3878
3879 megaraid_mbox_runpendq(adapter, NULL);
3880 }
3881
3882 kioc->done(kioc);
3883
3884 return;
3885}
3886
3887
3888/**
3889 * gather_hbainfo - HBA characteristics for the applications
a69b74d3
RD		 3890 * @adapter : HBA soft state
3891 * @hinfo : pointer to the caller's host info strucuture
1da177e4
LT		 3892 */
3893static int
3894gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3895{
3896 uint8_t dmajor;
3897
3898 dmajor = megaraid_mbox_version[0];
3899
3900 hinfo->pci_vendor_id = adapter->pdev->vendor;
3901 hinfo->pci_device_id = adapter->pdev->device;
3902 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3903 hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3904
3905 hinfo->pci_bus = adapter->pdev->bus->number;
3906 hinfo->pci_dev_fn = adapter->pdev->devfn;
3907 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn);
3908 hinfo->irq = adapter->host->irq;
3909 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport;
3910
3911 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3912 hinfo->host_no = adapter->host->host_no;
3913
3914 return 0;
3915}
3916
3917/*
3918 * END: Interface for the common management module
3919 */
3920
3921
3922
3923/**
3924 * megaraid_sysfs_alloc_resources - allocate sysfs related resources
a69b74d3 3925 * @adapter : controller's soft state
1da177e4
LT		 3926 *
3927 * Allocate packets required to issue FW calls whenever the sysfs attributes
3928 * are read. These attributes would require up-to-date information from the
3929 * FW. Also set up resources for mutual exclusion to share these resources and
3930 * the wait queue.
3931 *
a69b74d3
RD		 3932 * Return 0 on success.
3933 * Return -ERROR_CODE on failure.
1da177e4
LT		 3934 */
3935static int
3936megaraid_sysfs_alloc_resources(adapter_t *adapter)
3937{
3938 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3939 int rval = 0;
3940
3941 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3942
3943 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3944
3945 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3946 PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3947
3948 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3949 !raid_dev->sysfs_buffer) {
3950
3951 con_log(CL_ANN, (KERN_WARNING
3952 "megaraid: out of memory, %s %d\n", __FUNCTION__,
3953 __LINE__));
3954
3955 rval = -ENOMEM;
3956
3957 megaraid_sysfs_free_resources(adapter);
3958 }
3959
3960 sema_init(&raid_dev->sysfs_sem, 1);
3961
3962 init_waitqueue_head(&raid_dev->sysfs_wait_q);
3963
3964 return rval;
3965}
3966
3967
3968/**
3969 * megaraid_sysfs_free_resources - free sysfs related resources
a69b74d3 3970 * @adapter : controller's soft state
1da177e4
LT		 3971 *
3972 * Free packets allocated for sysfs FW commands
1da177e4
LT		 3973 */
3974static void
3975megaraid_sysfs_free_resources(adapter_t *adapter)
3976{
3977 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
3978
c9475cb0
JJ		 3979 kfree(raid_dev->sysfs_uioc);
3980 kfree(raid_dev->sysfs_mbox64);
1da177e4
LT		 3981
3982 if (raid_dev->sysfs_buffer) {
3983 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3984 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3985 }
3986}
3987
3988
3989/**
3990 * megaraid_sysfs_get_ldmap_done - callback for get ldmap
a69b74d3 3991 * @uioc : completed packet
1da177e4
LT		 3992 *
3993 * Callback routine called in the ISR/tasklet context for get ldmap call
1da177e4
LT		 3994 */
3995static void
3996megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3997{
3998 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
3999 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4000
4001 uioc->status = 0;
4002
4003 wake_up(&raid_dev->sysfs_wait_q);
4004}
4005
4006
4007/**
4008 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
a69b74d3 4009 * @data : timed out packet
1da177e4
LT		 4010 *
4011 * Timeout routine to recover and return to application, in case the adapter
a69b74d3
RD		 4012 * has stopped responding. A timeout of 60 seconds for this command seems like
4013 * a good value.
1da177e4
LT		 4014 */
4015static void
4016megaraid_sysfs_get_ldmap_timeout(unsigned long data)
4017{
4018 uioc_t *uioc = (uioc_t *)data;
4019 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
4020 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4021
4022 uioc->status = -ETIME;
4023
4024 wake_up(&raid_dev->sysfs_wait_q);
4025}
4026
4027
4028/**
4029 * megaraid_sysfs_get_ldmap - get update logical drive map
a69b74d3 4030 * @adapter : controller's soft state
1da177e4
LT		 4031 *
4032 * This routine will be called whenever user reads the logical drive
4033 * attributes, go get the current logical drive mapping table from the
4034 * firmware. We use the managment API's to issue commands to the controller.
4035 *
4036 * NOTE: The commands issuance functionality is not generalized and
4037 * implemented in context of "get ld map" command only. If required, the
4038 * command issuance logical can be trivially pulled out and implemented as a
4039 * standalone libary. For now, this should suffice since there is no other
4040 * user of this interface.
4041 *
a69b74d3
RD		 4042 * Return 0 on success.
4043 * Return -1 on failure.
1da177e4
LT		 4044 */
4045static int
4046megaraid_sysfs_get_ldmap(adapter_t *adapter)
4047{
4048 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4049 uioc_t *uioc;
4050 mbox64_t *mbox64;
4051 mbox_t *mbox;
4052 char *raw_mbox;
4053 struct timer_list sysfs_timer;
4054 struct timer_list *timerp;
4055 caddr_t ldmap;
4056 int rval = 0;
4057
4058 /*
4059 * Allow only one read at a time to go through the sysfs attributes
4060 */
4061 down(&raid_dev->sysfs_sem);
4062
4063 uioc = raid_dev->sysfs_uioc;
4064 mbox64 = raid_dev->sysfs_mbox64;
4065 ldmap = raid_dev->sysfs_buffer;
4066
4067 memset(uioc, 0, sizeof(uioc_t));
4068 memset(mbox64, 0, sizeof(mbox64_t));
4069 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
4070
4071 mbox = &mbox64->mbox32;
4072 raw_mbox = (char *)mbox;
4073 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64;
4074 uioc->buf_vaddr = (caddr_t)adapter;
4075 uioc->status = -ENODATA;
4076 uioc->done = megaraid_sysfs_get_ldmap_done;
4077
4078 /*
4079 * Prepare the mailbox packet to get the current logical drive mapping
4080 * table
4081 */
4082 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
4083
4084 raw_mbox[0] = FC_DEL_LOGDRV;
4085 raw_mbox[2] = OP_GET_LDID_MAP;
4086
4087 /*
4088 * Setup a timer to recover from a non-responding controller
4089 */
4090 timerp = &sysfs_timer;
4091 init_timer(timerp);
4092
4093 timerp->function = megaraid_sysfs_get_ldmap_timeout;
4094 timerp->data = (unsigned long)uioc;
4095 timerp->expires = jiffies + 60 * HZ;
4096
4097 add_timer(timerp);
4098
4099 /*
4100 * Send the command to the firmware
4101 */
4102 rval = megaraid_mbox_mm_command(adapter, uioc);
4103
4104 if (rval == 0) { // command successfully issued
4105 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4106
4107 /*
4108 * Check if the command timed out
4109 */
4110 if (uioc->status == -ETIME) {
4111 con_log(CL_ANN, (KERN_NOTICE
4112 "megaraid: sysfs get ld map timed out\n"));
4113
4114 rval = -ETIME;
4115 }
4116 else {
4117 rval = mbox->status;
4118 }
4119
4120 if (rval == 0) {
4121 memcpy(raid_dev->curr_ldmap, ldmap,
4122 sizeof(raid_dev->curr_ldmap));
4123 }
4124 else {
4125 con_log(CL_ANN, (KERN_NOTICE
4126 "megaraid: get ld map failed with %x\n", rval));
4127 }
4128 }
4129 else {
4130 con_log(CL_ANN, (KERN_NOTICE
4131 "megaraid: could not issue ldmap command:%x\n", rval));
4132 }
4133
4134
4135 del_timer_sync(timerp);
4136
4137 up(&raid_dev->sysfs_sem);
4138
4139 return rval;
4140}
4141
4142
4143/**
4144 * megaraid_sysfs_show_app_hndl - display application handle for this adapter
a69b74d3
RD		 4145 * @cdev : class device object representation for the host
4146 * @buf : buffer to send data to
1da177e4
LT		 4147 *
4148 * Display the handle used by the applications while executing management
4149 * tasks on the adapter. We invoke a management module API to get the adapter
4150 * handle, since we do not interface with applications directly.
1da177e4
LT		 4151 */
4152static ssize_t
4153megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf)
4154{
4155 struct Scsi_Host *shost = class_to_shost(cdev);
4156 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4157 uint32_t app_hndl;
4158
4159 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4160
4161 return snprintf(buf, 8, "%u\n", app_hndl);
4162}
4163
4164
4165/**
4166 * megaraid_sysfs_show_ldnum - display the logical drive number for this device
a69b74d3
RD		 4167 * @dev : device object representation for the scsi device
4168 * @attr : device attribute to show
4169 * @buf : buffer to send data to
1da177e4
LT		 4170 *
4171 * Display the logical drive number for the device in question, if it a valid
a69b74d3
RD		 4172 * logical drive. For physical devices, "-1" is returned.
4173 *
4174 * The logical drive number is displayed in following format:
1da177e4
LT		 4175 *
4176 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
1da177e4 4177 *
a69b74d3 4178 * <int> <int> <int> <int>
1da177e4
LT		 4179 */
4180static ssize_t
10523b3b 4181megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 4182{
4183 struct scsi_device *sdev = to_scsi_device(dev);
4184 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4185 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
4186 int scsi_id = -1;
4187 int logical_drv = -1;
4188 int ldid_map = -1;
4189 uint32_t app_hndl = 0;
4190 int mapped_sdev_id;
4191 int rval;
4192 int i;
4193
4194 if (raid_dev->random_del_supported &&
4195 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4196
4197 rval = megaraid_sysfs_get_ldmap(adapter);
4198 if (rval == 0) {
4199
4200 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4201
4202 mapped_sdev_id = sdev->id;
4203
4204 if (sdev->id > adapter->init_id) {
4205 mapped_sdev_id -= 1;
4206 }
4207
4208 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4209
4210 scsi_id = sdev->id;
4211
4212 logical_drv = i;
4213
4214 ldid_map = raid_dev->curr_ldmap[i];
4215
4216 app_hndl = mraid_mm_adapter_app_handle(
4217 adapter->unique_id);
4218
4219 break;
4220 }
4221 }
4222 }
4223 else {
4224 con_log(CL_ANN, (KERN_NOTICE
4225 "megaraid: sysfs get ld map failed: %x\n",
4226 rval));
4227 }
4228 }
4229
4230 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4231 ldid_map, app_hndl);
4232}
4233
4234
4235/*
4236 * END: Mailbox Low Level Driver
4237 */
4238module_init(megaraid_init);
4239module_exit(megaraid_exit);
4240
4241/* vim: set ts=8 sw=8 tw=78 ai si: */
Clone of davem's net-next-2.6 tree