Linux-2.6.12-rc2
[linux-2.6.git] / drivers / scsi / megaraid / megaraid_mbox.c
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
13  * Version      : v2.20.4.5 (Feb 03 2005)
14  *
15  * Authors:
16  *      Atul Mukker             <Atul.Mukker@lsil.com>
17  *      Sreenivas Bagalkote     <Sreenivas.Bagalkote@lsil.com>
18  *      Manoj Jose              <Manoj.Jose@lsil.com>
19  *
20  * List of supported controllers
21  *
22  * OEM  Product Name                    VID     DID     SSVID   SSID
23  * ---  ------------                    ---     ---     ----    ----
24  * Dell PERC3/QC                        101E    1960    1028    0471
25  * Dell PERC3/DC                        101E    1960    1028    0493
26  * Dell PERC3/SC                        101E    1960    1028    0475
27  * Dell PERC3/Di                        1028    1960    1028    0123
28  * Dell PERC4/SC                        1000    1960    1028    0520
29  * Dell PERC4/DC                        1000    1960    1028    0518
30  * Dell PERC4/QC                        1000    0407    1028    0531
31  * Dell PERC4/Di                        1028    000F    1028    014A
32  * Dell PERC 4e/Si                      1028    0013    1028    016c
33  * Dell PERC 4e/Di                      1028    0013    1028    016d
34  * Dell PERC 4e/Di                      1028    0013    1028    016e
35  * Dell PERC 4e/Di                      1028    0013    1028    016f
36  * Dell PERC 4e/Di                      1028    0013    1028    0170
37  * Dell PERC 4e/DC                      1000    0408    1028    0002
38  * Dell PERC 4e/SC                      1000    0408    1028    0001
39  *
40  *
41  * LSI MegaRAID SCSI 320-0              1000    1960    1000    A520
42  * LSI MegaRAID SCSI 320-1              1000    1960    1000    0520
43  * LSI MegaRAID SCSI 320-2              1000    1960    1000    0518
44  * LSI MegaRAID SCSI 320-0X             1000    0407    1000    0530
45  * LSI MegaRAID SCSI 320-2X             1000    0407    1000    0532
46  * LSI MegaRAID SCSI 320-4X             1000    0407    1000    0531
47  * LSI MegaRAID SCSI 320-1E             1000    0408    1000    0001
48  * LSI MegaRAID SCSI 320-2E             1000    0408    1000    0002
49  * LSI MegaRAID SATA 150-4              1000    1960    1000    4523
50  * LSI MegaRAID SATA 150-6              1000    1960    1000    0523
51  * LSI MegaRAID SATA 300-4X             1000    0409    1000    3004
52  * LSI MegaRAID SATA 300-8X             1000    0409    1000    3008
53  *
54  * INTEL RAID Controller SRCU42X        1000    0407    8086    0532
55  * INTEL RAID Controller SRCS16         1000    1960    8086    0523
56  * INTEL RAID Controller SRCU42E        1000    0408    8086    0002
57  * INTEL RAID Controller SRCZCRX        1000    0407    8086    0530
58  * INTEL RAID Controller SRCS28X        1000    0409    8086    3008
59  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3431
60  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3499
61  * INTEL RAID Controller SRCU51L        1000    1960    8086    0520
62  *
63  * FSC  MegaRAID PCI Express ROMB       1000    0408    1734    1065
64  *
65  * ACER MegaRAID ROMB-2E                1000    0408    1025    004D
66  *
67  * NEC  MegaRAID PCI Express ROMB       1000    0408    1033    8287
68  *
69  * For history of changes, see Documentation/ChangeLog.megaraid
70  */
71
72 #include "megaraid_mbox.h"
73
74 static int megaraid_init(void);
75 static void megaraid_exit(void);
76
77 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
78 static void megaraid_detach_one(struct pci_dev *);
79 static void megaraid_mbox_shutdown(struct device *);
80
81 static int megaraid_io_attach(adapter_t *);
82 static void megaraid_io_detach(adapter_t *);
83
84 static int megaraid_init_mbox(adapter_t *);
85 static void megaraid_fini_mbox(adapter_t *);
86
87 static int megaraid_alloc_cmd_packets(adapter_t *);
88 static void megaraid_free_cmd_packets(adapter_t *);
89
90 static int megaraid_mbox_setup_dma_pools(adapter_t *);
91 static void megaraid_mbox_teardown_dma_pools(adapter_t *);
92
93 static int megaraid_sysfs_alloc_resources(adapter_t *);
94 static void megaraid_sysfs_free_resources(adapter_t *);
95
96 static int megaraid_abort_handler(struct scsi_cmnd *);
97 static int megaraid_reset_handler(struct scsi_cmnd *);
98
99 static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
100 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
101 static int megaraid_busywait_mbox(mraid_device_t *);
102 static int megaraid_mbox_product_info(adapter_t *);
103 static int megaraid_mbox_extended_cdb(adapter_t *);
104 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
105 static int megaraid_mbox_support_random_del(adapter_t *);
106 static int megaraid_mbox_get_max_sg(adapter_t *);
107 static void megaraid_mbox_enum_raid_scsi(adapter_t *);
108 static void megaraid_mbox_flush_cache(adapter_t *);
109
110 static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
111 static void megaraid_mbox_setup_device_map(adapter_t *);
112
113 static int megaraid_queue_command(struct scsi_cmnd *,
114                 void (*)(struct scsi_cmnd *));
115 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
116 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
117 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
118                 struct scsi_cmnd *);
119 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
120                 struct scsi_cmnd *);
121
122 static irqreturn_t megaraid_isr(int, void *, struct pt_regs *);
123
124 static void megaraid_mbox_dpc(unsigned long);
125
126 static ssize_t megaraid_sysfs_show_app_hndl(struct class_device *, char *);
127 static ssize_t megaraid_sysfs_show_ldnum(struct device *, char *);
128
129 static int megaraid_cmm_register(adapter_t *);
130 static int megaraid_cmm_unregister(adapter_t *);
131 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
132 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
133 static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
134 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
135 static int wait_till_fw_empty(adapter_t *);
136
137
138
139 MODULE_AUTHOR("LSI Logic Corporation");
140 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
141 MODULE_LICENSE("GPL");
142 MODULE_VERSION(MEGARAID_VERSION);
143
144 /*
145  * ### modules parameters for driver ###
146  */
147
148 /**
149  * Set to enable driver to expose unconfigured disk to kernel
150  */
151 static int megaraid_expose_unconf_disks = 0;
152 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
153 MODULE_PARM_DESC(unconf_disks,
154         "Set to expose unconfigured disks to kernel (default=0)");
155
156 /**
157  * driver wait time if the adapter's mailbox is busy
158  */
159 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
160 module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
161 MODULE_PARM_DESC(busy_wait,
162         "Max wait for mailbox in microseconds if busy (default=10)");
163
164 /**
165  * number of sectors per IO command
166  */
167 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
168 module_param_named(max_sectors, megaraid_max_sectors, int, 0);
169 MODULE_PARM_DESC(max_sectors,
170         "Maximum number of sectors per IO command (default=128)");
171
172 /**
173  * number of commands per logical unit
174  */
175 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
176 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
177 MODULE_PARM_DESC(cmd_per_lun,
178         "Maximum number of commands per logical unit (default=64)");
179
180
181 /**
182  * Fast driver load option, skip scanning for physical devices during load.
183  * This would result in non-disk devices being skipped during driver load
184  * time. These can be later added though, using /proc/scsi/scsi
185  */
186 static unsigned int megaraid_fast_load = 0;
187 module_param_named(fast_load, megaraid_fast_load, int, 0);
188 MODULE_PARM_DESC(fast_load,
189         "Faster loading of the driver, skips physical devices! (default=0)");
190
191
192 /**
193  * mraid_debug level - threshold for amount of information to be displayed by
194  * the driver. This level can be changed through modules parameters, ioctl or
195  * sysfs/proc interface. By default, print the announcement messages only.
196  */
197 int mraid_debug_level = CL_ANN;
198 module_param_named(debug_level, mraid_debug_level, int, 0);
199 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
200
201 /*
202  * ### global data ###
203  */
204 static uint8_t megaraid_mbox_version[8] =
205         { 0x02, 0x20, 0x04, 0x05, 2, 3, 20, 5 };
206
207
208 /*
209  * PCI table for all supported controllers.
210  */
211 static struct pci_device_id pci_id_table_g[] =  {
212         {
213                 PCI_VENDOR_ID_DELL,
214                 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
215                 PCI_VENDOR_ID_DELL,
216                 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
217         },
218         {
219                 PCI_VENDOR_ID_LSI_LOGIC,
220                 PCI_DEVICE_ID_PERC4_SC,
221                 PCI_VENDOR_ID_DELL,
222                 PCI_SUBSYS_ID_PERC4_SC,
223         },
224         {
225                 PCI_VENDOR_ID_LSI_LOGIC,
226                 PCI_DEVICE_ID_PERC4_DC,
227                 PCI_VENDOR_ID_DELL,
228                 PCI_SUBSYS_ID_PERC4_DC,
229         },
230         {
231                 PCI_VENDOR_ID_LSI_LOGIC,
232                 PCI_DEVICE_ID_PERC4_QC,
233                 PCI_VENDOR_ID_DELL,
234                 PCI_SUBSYS_ID_PERC4_QC,
235         },
236         {
237                 PCI_VENDOR_ID_DELL,
238                 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
239                 PCI_VENDOR_ID_DELL,
240                 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
241         },
242         {
243                 PCI_VENDOR_ID_DELL,
244                 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
245                 PCI_VENDOR_ID_DELL,
246                 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
247         },
248         {
249                 PCI_VENDOR_ID_DELL,
250                 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
251                 PCI_VENDOR_ID_DELL,
252                 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
253         },
254         {
255                 PCI_VENDOR_ID_DELL,
256                 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
257                 PCI_VENDOR_ID_DELL,
258                 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
259         },
260         {
261                 PCI_VENDOR_ID_DELL,
262                 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
263                 PCI_VENDOR_ID_DELL,
264                 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
265         },
266         {
267                 PCI_VENDOR_ID_DELL,
268                 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
269                 PCI_VENDOR_ID_DELL,
270                 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
271         },
272         {
273                 PCI_VENDOR_ID_LSI_LOGIC,
274                 PCI_DEVICE_ID_PERC4E_DC_320_2E,
275                 PCI_VENDOR_ID_DELL,
276                 PCI_SUBSYS_ID_PERC4E_DC_320_2E,
277         },
278         {
279                 PCI_VENDOR_ID_LSI_LOGIC,
280                 PCI_DEVICE_ID_PERC4E_SC_320_1E,
281                 PCI_VENDOR_ID_DELL,
282                 PCI_SUBSYS_ID_PERC4E_SC_320_1E,
283         },
284         {
285                 PCI_VENDOR_ID_AMI,
286                 PCI_DEVICE_ID_AMI_MEGARAID3,
287                 PCI_VENDOR_ID_DELL,
288                 PCI_SUBSYS_ID_PERC3_QC,
289         },
290         {
291                 PCI_VENDOR_ID_AMI,
292                 PCI_DEVICE_ID_AMI_MEGARAID3,
293                 PCI_VENDOR_ID_DELL,
294                 PCI_SUBSYS_ID_PERC3_DC,
295         },
296         {
297                 PCI_VENDOR_ID_AMI,
298                 PCI_DEVICE_ID_AMI_MEGARAID3,
299                 PCI_VENDOR_ID_DELL,
300                 PCI_SUBSYS_ID_PERC3_SC,
301         },
302         {
303                 PCI_VENDOR_ID_AMI,
304                 PCI_DEVICE_ID_AMI_MEGARAID3,
305                 PCI_VENDOR_ID_AMI,
306                 PCI_SUBSYS_ID_PERC3_SC,
307         },
308         {
309                 PCI_VENDOR_ID_AMI,
310                 PCI_DEVICE_ID_AMI_MEGARAID3,
311                 PCI_VENDOR_ID_AMI,
312                 PCI_SUBSYS_ID_PERC3_DC,
313         },
314         {
315                 PCI_VENDOR_ID_LSI_LOGIC,
316                 PCI_DEVICE_ID_MEGARAID_SCSI_320_0,
317                 PCI_VENDOR_ID_LSI_LOGIC,
318                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_0,
319         },
320         {
321                 PCI_VENDOR_ID_LSI_LOGIC,
322                 PCI_DEVICE_ID_MEGARAID_SCSI_320_1,
323                 PCI_VENDOR_ID_LSI_LOGIC,
324                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_1,
325         },
326         {
327                 PCI_VENDOR_ID_LSI_LOGIC,
328                 PCI_DEVICE_ID_MEGARAID_SCSI_320_2,
329                 PCI_VENDOR_ID_LSI_LOGIC,
330                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_2,
331         },
332         {
333                 PCI_VENDOR_ID_LSI_LOGIC,
334                 PCI_DEVICE_ID_MEGARAID_SCSI_320_0x,
335                 PCI_VENDOR_ID_LSI_LOGIC,
336                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_0x,
337         },
338         {
339                 PCI_VENDOR_ID_LSI_LOGIC,
340                 PCI_DEVICE_ID_MEGARAID_SCSI_320_2x,
341                 PCI_VENDOR_ID_LSI_LOGIC,
342                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_2x,
343         },
344         {
345                 PCI_VENDOR_ID_LSI_LOGIC,
346                 PCI_DEVICE_ID_MEGARAID_SCSI_320_4x,
347                 PCI_VENDOR_ID_LSI_LOGIC,
348                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_4x,
349         },
350         {
351                 PCI_VENDOR_ID_LSI_LOGIC,
352                 PCI_DEVICE_ID_MEGARAID_SCSI_320_1E,
353                 PCI_VENDOR_ID_LSI_LOGIC,
354                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_1E,
355         },
356         {
357                 PCI_VENDOR_ID_LSI_LOGIC,
358                 PCI_DEVICE_ID_MEGARAID_SCSI_320_2E,
359                 PCI_VENDOR_ID_LSI_LOGIC,
360                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_2E,
361         },
362         {
363                 PCI_VENDOR_ID_LSI_LOGIC,
364                 PCI_DEVICE_ID_MEGARAID_I4_133_RAID,
365                 PCI_VENDOR_ID_LSI_LOGIC,
366                 PCI_SUBSYS_ID_MEGARAID_I4_133_RAID,
367         },
368         {
369                 PCI_VENDOR_ID_LSI_LOGIC,
370                 PCI_DEVICE_ID_MEGARAID_SATA_150_4,
371                 PCI_VENDOR_ID_LSI_LOGIC,
372                 PCI_SUBSYS_ID_MEGARAID_SATA_150_4,
373         },
374         {
375                 PCI_VENDOR_ID_LSI_LOGIC,
376                 PCI_DEVICE_ID_MEGARAID_SATA_150_6,
377                 PCI_VENDOR_ID_LSI_LOGIC,
378                 PCI_SUBSYS_ID_MEGARAID_SATA_150_6,
379         },
380         {
381                 PCI_VENDOR_ID_LSI_LOGIC,
382                 PCI_DEVICE_ID_MEGARAID_SATA_300_4x,
383                 PCI_VENDOR_ID_LSI_LOGIC,
384                 PCI_SUBSYS_ID_MEGARAID_SATA_300_4x,
385         },
386         {
387                 PCI_VENDOR_ID_LSI_LOGIC,
388                 PCI_DEVICE_ID_MEGARAID_SATA_300_8x,
389                 PCI_VENDOR_ID_LSI_LOGIC,
390                 PCI_SUBSYS_ID_MEGARAID_SATA_300_8x,
391         },
392         {
393                 PCI_VENDOR_ID_LSI_LOGIC,
394                 PCI_DEVICE_ID_INTEL_RAID_SRCU42X,
395                 PCI_VENDOR_ID_INTEL,
396                 PCI_SUBSYS_ID_INTEL_RAID_SRCU42X,
397         },
398         {
399                 PCI_VENDOR_ID_LSI_LOGIC,
400                 PCI_DEVICE_ID_INTEL_RAID_SRCS16,
401                 PCI_VENDOR_ID_INTEL,
402                 PCI_SUBSYS_ID_INTEL_RAID_SRCS16,
403         },
404         {
405                 PCI_VENDOR_ID_LSI_LOGIC,
406                 PCI_DEVICE_ID_INTEL_RAID_SRCU42E,
407                 PCI_VENDOR_ID_INTEL,
408                 PCI_SUBSYS_ID_INTEL_RAID_SRCU42E,
409         },
410         {
411                 PCI_VENDOR_ID_LSI_LOGIC,
412                 PCI_DEVICE_ID_INTEL_RAID_SRCZCRX,
413                 PCI_VENDOR_ID_INTEL,
414                 PCI_SUBSYS_ID_INTEL_RAID_SRCZCRX,
415         },
416         {
417                 PCI_VENDOR_ID_LSI_LOGIC,
418                 PCI_DEVICE_ID_INTEL_RAID_SRCS28X,
419                 PCI_VENDOR_ID_INTEL,
420                 PCI_SUBSYS_ID_INTEL_RAID_SRCS28X,
421         },
422         {
423                 PCI_VENDOR_ID_LSI_LOGIC,
424                 PCI_DEVICE_ID_INTEL_RAID_SROMBU42E_ALIEF,
425                 PCI_VENDOR_ID_INTEL,
426                 PCI_SUBSYS_ID_INTEL_RAID_SROMBU42E_ALIEF,
427         },
428         {
429                 PCI_VENDOR_ID_LSI_LOGIC,
430                 PCI_DEVICE_ID_INTEL_RAID_SROMBU42E_HARWICH,
431                 PCI_VENDOR_ID_INTEL,
432                 PCI_SUBSYS_ID_INTEL_RAID_SROMBU42E_HARWICH,
433         },
434         {
435                 PCI_VENDOR_ID_LSI_LOGIC,
436                 PCI_DEVICE_ID_INTEL_RAID_SRCU41L_LAKE_SHETEK,
437                 PCI_VENDOR_ID_INTEL,
438                 PCI_SUBSYS_ID_INTEL_RAID_SRCU41L_LAKE_SHETEK,
439         },
440         {
441                 PCI_VENDOR_ID_LSI_LOGIC,
442                 PCI_DEVICE_ID_FSC_MEGARAID_PCI_EXPRESS_ROMB,
443                 PCI_SUBSYS_ID_FSC,
444                 PCI_SUBSYS_ID_FSC_MEGARAID_PCI_EXPRESS_ROMB,
445         },
446         {
447                 PCI_VENDOR_ID_LSI_LOGIC,
448                 PCI_DEVICE_ID_MEGARAID_ACER_ROMB_2E,
449                 PCI_VENDOR_ID_AI,
450                 PCI_SUBSYS_ID_MEGARAID_ACER_ROMB_2E,
451         },
452         {
453                 PCI_VENDOR_ID_LSI_LOGIC,
454                 PCI_DEVICE_ID_MEGARAID_NEC_ROMB_2E,
455                 PCI_VENDOR_ID_NEC,
456                 PCI_SUBSYS_ID_MEGARAID_NEC_ROMB_2E,
457         },
458         {0}     /* Terminating entry */
459 };
460 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
461
462
463 static struct pci_driver megaraid_pci_driver_g = {
464         .name           = "megaraid",
465         .id_table       = pci_id_table_g,
466         .probe          = megaraid_probe_one,
467         .remove         = __devexit_p(megaraid_detach_one),
468         .driver         = {
469                 .shutdown       = megaraid_mbox_shutdown,
470         }
471 };
472
473
474
475 // definitions for the device attributes for exporting logical drive number
476 // for a scsi address (Host, Channel, Id, Lun)
477
478 CLASS_DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
479                 NULL);
480
481 // Host template initializer for megaraid mbox sysfs device attributes
482 static struct class_device_attribute *megaraid_shost_attrs[] = {
483         &class_device_attr_megaraid_mbox_app_hndl,
484         NULL,
485 };
486
487
488 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
489
490 // Host template initializer for megaraid mbox sysfs device attributes
491 static struct device_attribute *megaraid_sdev_attrs[] = {
492         &dev_attr_megaraid_mbox_ld,
493         NULL,
494 };
495
496
497 /*
498  * Scsi host template for megaraid unified driver
499  */
500 static struct scsi_host_template megaraid_template_g = {
501         .module                         = THIS_MODULE,
502         .name                           = "LSI Logic MegaRAID driver",
503         .proc_name                      = "megaraid",
504         .queuecommand                   = megaraid_queue_command,
505         .eh_abort_handler               = megaraid_abort_handler,
506         .eh_device_reset_handler        = megaraid_reset_handler,
507         .eh_bus_reset_handler           = megaraid_reset_handler,
508         .eh_host_reset_handler          = megaraid_reset_handler,
509         .use_clustering                 = ENABLE_CLUSTERING,
510         .sdev_attrs                     = megaraid_sdev_attrs,
511         .shost_attrs                    = megaraid_shost_attrs,
512 };
513
514
515 /**
516  * megaraid_init - module load hook
517  *
518  * We register ourselves as hotplug enabled module and let PCI subsystem
519  * discover our adaters
520  **/
521 static int __init
522 megaraid_init(void)
523 {
524         int     rval;
525
526         // Announce the driver version
527         con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
528                 MEGARAID_EXT_VERSION));
529
530         // check validity of module parameters
531         if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
532
533                 con_log(CL_ANN, (KERN_WARNING
534                         "megaraid mailbox: max commands per lun reset to %d\n",
535                         MBOX_MAX_SCSI_CMDS));
536
537                 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
538         }
539
540
541         // register as a PCI hot-plug driver module
542         if ((rval = pci_module_init(&megaraid_pci_driver_g))) {
543                 con_log(CL_ANN, (KERN_WARNING
544                         "megaraid: could not register hotplug support.\n"));
545         }
546
547         return rval;
548 }
549
550
551 /**
552  * megaraid_exit - driver unload entry point
553  *
554  * We simply unwrap the megaraid_init routine here
555  */
556 static void __exit
557 megaraid_exit(void)
558 {
559         con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
560
561         // unregister as PCI hotplug driver
562         pci_unregister_driver(&megaraid_pci_driver_g);
563
564         return;
565 }
566
567
568 /**
569  * megaraid_probe_one - PCI hotplug entry point
570  * @param pdev  : handle to this controller's PCI configuration space
571  * @param id    : pci device id of the class of controllers
572  *
573  * This routine should be called whenever a new adapter is detected by the
574  * PCI hotplug susbsytem.
575  **/
576 static int __devinit
577 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
578 {
579         adapter_t       *adapter;
580
581
582         // detected a new controller
583         con_log(CL_ANN, (KERN_INFO
584                 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
585                 pdev->vendor, pdev->device, pdev->subsystem_vendor,
586                 pdev->subsystem_device));
587
588         con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
589                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
590
591         if (pci_enable_device(pdev)) {
592                 con_log(CL_ANN, (KERN_WARNING
593                                 "megaraid: pci_enable_device failed\n"));
594
595                 return -ENODEV;
596         }
597
598         // Enable bus-mastering on this controller
599         pci_set_master(pdev);
600
601         // Allocate the per driver initialization structure
602         adapter = kmalloc(sizeof(adapter_t), GFP_KERNEL);
603
604         if (adapter == NULL) {
605                 con_log(CL_ANN, (KERN_WARNING
606                 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__));
607
608                 goto out_probe_one;
609         }
610         memset(adapter, 0, sizeof(adapter_t));
611
612
613         // set up PCI related soft state and other pre-known parameters
614         adapter->unique_id      = pdev->bus->number << 8 | pdev->devfn;
615         adapter->irq            = pdev->irq;
616         adapter->pdev           = pdev;
617
618         atomic_set(&adapter->being_detached, 0);
619
620         // Setup the default DMA mask. This would be changed later on
621         // depending on hardware capabilities
622         if (pci_set_dma_mask(adapter->pdev, 0xFFFFFFFF) != 0) {
623
624                 con_log(CL_ANN, (KERN_WARNING
625                         "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
626
627                 goto out_free_adapter;
628         }
629
630
631         // Initialize the synchronization lock for kernel and LLD
632         spin_lock_init(&adapter->lock);
633         adapter->host_lock = &adapter->lock;
634
635
636         // Initialize the command queues: the list of free SCBs and the list
637         // of pending SCBs.
638         INIT_LIST_HEAD(&adapter->kscb_pool);
639         spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
640
641         INIT_LIST_HEAD(&adapter->pend_list);
642         spin_lock_init(PENDING_LIST_LOCK(adapter));
643
644         INIT_LIST_HEAD(&adapter->completed_list);
645         spin_lock_init(COMPLETED_LIST_LOCK(adapter));
646
647
648         // Start the mailbox based controller
649         if (megaraid_init_mbox(adapter) != 0) {
650                 con_log(CL_ANN, (KERN_WARNING
651                         "megaraid: maibox adapter did not initialize\n"));
652
653                 goto out_free_adapter;
654         }
655
656         // Register with LSI Common Management Module
657         if (megaraid_cmm_register(adapter) != 0) {
658
659                 con_log(CL_ANN, (KERN_WARNING
660                 "megaraid: could not register with management module\n"));
661
662                 goto out_fini_mbox;
663         }
664
665         // setup adapter handle in PCI soft state
666         pci_set_drvdata(pdev, adapter);
667
668         // attach with scsi mid-layer
669         if (megaraid_io_attach(adapter) != 0) {
670
671                 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
672
673                 goto out_cmm_unreg;
674         }
675
676         return 0;
677
678 out_cmm_unreg:
679         pci_set_drvdata(pdev, NULL);
680         megaraid_cmm_unregister(adapter);
681 out_fini_mbox:
682         megaraid_fini_mbox(adapter);
683 out_free_adapter:
684         kfree(adapter);
685 out_probe_one:
686         pci_disable_device(pdev);
687
688         return -ENODEV;
689 }
690
691
692 /**
693  * megaraid_detach_one - release the framework resources and call LLD release
694  * routine
695  * @param pdev  : handle for our PCI cofiguration space
696  *
697  * This routine is called during driver unload. We free all the allocated
698  * resources and call the corresponding LLD so that it can also release all
699  * its resources.
700  *
701  * This routine is also called from the PCI hotplug system
702  **/
703 static void
704 megaraid_detach_one(struct pci_dev *pdev)
705 {
706         adapter_t               *adapter;
707         struct Scsi_Host        *host;
708
709
710         // Start a rollback on this adapter
711         adapter = pci_get_drvdata(pdev);
712
713         if (!adapter) {
714                 con_log(CL_ANN, (KERN_CRIT
715                 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
716                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
717                         pdev->subsystem_device));
718
719                 return;
720         }
721         else {
722                 con_log(CL_ANN, (KERN_NOTICE
723                 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
724                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
725                         pdev->subsystem_device));
726         }
727
728
729         host = adapter->host;
730
731         // do not allow any more requests from the management module for this
732         // adapter.
733         // FIXME: How do we account for the request which might still be
734         // pending with us?
735         atomic_set(&adapter->being_detached, 1);
736
737         // detach from the IO sub-system
738         megaraid_io_detach(adapter);
739
740         // reset the device state in the PCI structure. We check this
741         // condition when we enter here. If the device state is NULL,
742         // that would mean the device has already been removed
743         pci_set_drvdata(pdev, NULL);
744
745         // Unregister from common management module
746         //
747         // FIXME: this must return success or failure for conditions if there
748         // is a command pending with LLD or not.
749         megaraid_cmm_unregister(adapter);
750
751         // finalize the mailbox based controller and release all resources
752         megaraid_fini_mbox(adapter);
753
754         kfree(adapter);
755
756         scsi_host_put(host);
757
758         pci_disable_device(pdev);
759
760         return;
761 }
762
763
764 /**
765  * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
766  * @param device        : generice driver model device
767  *
768  * Shutdown notification, perform flush cache
769  */
770 static void
771 megaraid_mbox_shutdown(struct device *device)
772 {
773         adapter_t               *adapter = pci_get_drvdata(to_pci_dev(device));
774         static int              counter;
775
776         if (!adapter) {
777                 con_log(CL_ANN, (KERN_WARNING
778                         "megaraid: null device in shutdown\n"));
779                 return;
780         }
781
782         // flush caches now
783         con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
784                 counter++));
785
786         megaraid_mbox_flush_cache(adapter);
787
788         con_log(CL_ANN, ("done\n"));
789 }
790
791
792 /**
793  * megaraid_io_attach - attach a device with the IO subsystem
794  * @param adapter       : controller's soft state
795  *
796  * Attach this device with the IO subsystem
797  **/
798 static int
799 megaraid_io_attach(adapter_t *adapter)
800 {
801         struct Scsi_Host        *host;
802
803         // Initialize SCSI Host structure
804         host = scsi_host_alloc(&megaraid_template_g, 8);
805         if (!host) {
806                 con_log(CL_ANN, (KERN_WARNING
807                         "megaraid mbox: scsi_register failed\n"));
808
809                 return -1;
810         }
811
812         SCSIHOST2ADAP(host)     = (caddr_t)adapter;
813         adapter->host           = host;
814
815         // export the parameters required by the mid-layer
816         scsi_assign_lock(host, adapter->host_lock);
817         scsi_set_device(host, &adapter->pdev->dev);
818
819         host->irq               = adapter->irq;
820         host->unique_id         = adapter->unique_id;
821         host->can_queue         = adapter->max_cmds;
822         host->this_id           = adapter->init_id;
823         host->sg_tablesize      = adapter->sglen;
824         host->max_sectors       = adapter->max_sectors;
825         host->cmd_per_lun       = adapter->cmd_per_lun;
826         host->max_channel       = adapter->max_channel;
827         host->max_id            = adapter->max_target;
828         host->max_lun           = adapter->max_lun;
829
830
831         // notify mid-layer about the new controller
832         if (scsi_add_host(host, &adapter->pdev->dev)) {
833
834                 con_log(CL_ANN, (KERN_WARNING
835                         "megaraid mbox: scsi_add_host failed\n"));
836
837                 scsi_host_put(host);
838
839                 return -1;
840         }
841
842         scsi_scan_host(host);
843
844         return 0;
845 }
846
847
848 /**
849  * megaraid_io_detach - detach a device from the IO subsystem
850  * @param adapter       : controller's soft state
851  *
852  * Detach this device from the IO subsystem
853  **/
854 static void
855 megaraid_io_detach(adapter_t *adapter)
856 {
857         struct Scsi_Host        *host;
858
859         con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
860
861         host = adapter->host;
862
863         scsi_remove_host(host);
864
865         return;
866 }
867
868
869 /*
870  * START: Mailbox Low Level Driver
871  *
872  * This is section specific to the single mailbox based controllers
873  */
874
875 /**
876  * megaraid_init_mbox - initialize controller
877  * @param adapter       - our soft state
878  *
879  * . Allocate 16-byte aligned mailbox memory for firmware handshake
880  * . Allocate controller's memory resources
881  * . Find out all initialization data
882  * . Allocate memory required for all the commands
883  * . Use internal library of FW routines, build up complete soft state
884  */
885 static int __init
886 megaraid_init_mbox(adapter_t *adapter)
887 {
888         struct pci_dev          *pdev;
889         mraid_device_t          *raid_dev;
890         int                     i;
891
892
893         adapter->ito    = MBOX_TIMEOUT;
894         pdev            = adapter->pdev;
895
896         /*
897          * Allocate and initialize the init data structure for mailbox
898          * controllers
899          */
900         raid_dev = kmalloc(sizeof(mraid_device_t), GFP_KERNEL);
901         if (raid_dev == NULL) return -1;
902
903         memset(raid_dev, 0, sizeof(mraid_device_t));
904
905         /*
906          * Attach the adapter soft state to raid device soft state
907          */
908         adapter->raid_device    = (caddr_t)raid_dev;
909         raid_dev->fast_load     = megaraid_fast_load;
910
911
912         // our baseport
913         raid_dev->baseport = pci_resource_start(pdev, 0);
914
915         if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
916
917                 con_log(CL_ANN, (KERN_WARNING
918                                 "megaraid: mem region busy\n"));
919
920                 goto out_free_raid_dev;
921         }
922
923         raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
924
925         if (!raid_dev->baseaddr) {
926
927                 con_log(CL_ANN, (KERN_WARNING
928                         "megaraid: could not map hba memory\n") );
929
930                 goto out_release_regions;
931         }
932
933         //
934         // Setup the rest of the soft state using the library of FW routines
935         //
936
937         // request IRQ and register the interrupt service routine
938         if (request_irq(adapter->irq, megaraid_isr, SA_SHIRQ, "megaraid",
939                 adapter)) {
940
941                 con_log(CL_ANN, (KERN_WARNING
942                         "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
943
944                 goto out_iounmap;
945         }
946
947
948         // initialize the mutual exclusion lock for the mailbox
949         spin_lock_init(&raid_dev->mailbox_lock);
950
951         // allocate memory required for commands
952         if (megaraid_alloc_cmd_packets(adapter) != 0) {
953                 goto out_free_irq;
954         }
955
956         // Product info
957         if (megaraid_mbox_product_info(adapter) != 0) {
958                 goto out_alloc_cmds;
959         }
960
961         // Do we support extended CDBs
962         adapter->max_cdb_sz = 10;
963         if (megaraid_mbox_extended_cdb(adapter) == 0) {
964                 adapter->max_cdb_sz = 16;
965         }
966
967         /*
968          * Do we support cluster environment, if we do, what is the initiator
969          * id.
970          * NOTE: In a non-cluster aware firmware environment, the LLD should
971          * return 7 as initiator id.
972          */
973         adapter->ha             = 0;
974         adapter->init_id        = -1;
975         if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
976                 adapter->ha = 1;
977         }
978
979         /*
980          * Prepare the device ids array to have the mapping between the kernel
981          * device address and megaraid device address.
982          * We export the physical devices on their actual addresses. The
983          * logical drives are exported on a virtual SCSI channel
984          */
985         megaraid_mbox_setup_device_map(adapter);
986
987         // If the firmware supports random deletion, update the device id map
988         if (megaraid_mbox_support_random_del(adapter)) {
989
990                 // Change the logical drives numbers in device_ids array one
991                 // slot in device_ids is reserved for target id, that's why
992                 // "<=" below
993                 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
994                         adapter->device_ids[adapter->max_channel][i] += 0x80;
995                 }
996                 adapter->device_ids[adapter->max_channel][adapter->init_id] =
997                         0xFF;
998
999                 raid_dev->random_del_supported = 1;
1000         }
1001
1002         /*
1003          * find out the maximum number of scatter-gather elements supported by
1004          * this firmware
1005          */
1006         adapter->sglen = megaraid_mbox_get_max_sg(adapter);
1007
1008         // enumerate RAID and SCSI channels so that all devices on SCSI
1009         // channels can later be exported, including disk devices
1010         megaraid_mbox_enum_raid_scsi(adapter);
1011
1012         /*
1013          * Other parameters required by upper layer
1014          *
1015          * maximum number of sectors per IO command
1016          */
1017         adapter->max_sectors = megaraid_max_sectors;
1018
1019         /*
1020          * number of queued commands per LUN.
1021          */
1022         adapter->cmd_per_lun = megaraid_cmd_per_lun;
1023
1024         /*
1025          * Allocate resources required to issue FW calls, when sysfs is
1026          * accessed
1027          */
1028         if (megaraid_sysfs_alloc_resources(adapter) != 0) {
1029                 goto out_alloc_cmds;
1030         }
1031
1032         // Set the DMA mask to 64-bit. All supported controllers as capable of
1033         // DMA in this range
1034         if (pci_set_dma_mask(adapter->pdev, 0xFFFFFFFFFFFFFFFFULL) != 0) {
1035
1036                 con_log(CL_ANN, (KERN_WARNING
1037                         "megaraid: could not set DMA mask for 64-bit.\n"));
1038
1039                 goto out_free_sysfs_res;
1040         }
1041
1042         // setup tasklet for DPC
1043         tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
1044                         (unsigned long)adapter);
1045
1046         con_log(CL_DLEVEL1, (KERN_INFO
1047                 "megaraid mbox hba successfully initialized\n"));
1048
1049         return 0;
1050
1051 out_free_sysfs_res:
1052         megaraid_sysfs_free_resources(adapter);
1053 out_alloc_cmds:
1054         megaraid_free_cmd_packets(adapter);
1055 out_free_irq:
1056         free_irq(adapter->irq, adapter);
1057 out_iounmap:
1058         iounmap(raid_dev->baseaddr);
1059 out_release_regions:
1060         pci_release_regions(pdev);
1061 out_free_raid_dev:
1062         kfree(raid_dev);
1063
1064         return -1;
1065 }
1066
1067
1068 /**
1069  * megaraid_fini_mbox - undo controller initialization
1070  * @param adapter       : our soft state
1071  */
1072 static void
1073 megaraid_fini_mbox(adapter_t *adapter)
1074 {
1075         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1076
1077         // flush all caches
1078         megaraid_mbox_flush_cache(adapter);
1079
1080         tasklet_kill(&adapter->dpc_h);
1081
1082         megaraid_sysfs_free_resources(adapter);
1083
1084         megaraid_free_cmd_packets(adapter);
1085
1086         free_irq(adapter->irq, adapter);
1087
1088         iounmap(raid_dev->baseaddr);
1089
1090         pci_release_regions(adapter->pdev);
1091
1092         kfree(raid_dev);
1093
1094         return;
1095 }
1096
1097
1098 /**
1099  * megaraid_alloc_cmd_packets - allocate shared mailbox
1100  * @param adapter       : soft state of the raid controller
1101  *
1102  * Allocate and align the shared mailbox. This maibox is used to issue
1103  * all the commands. For IO based controllers, the mailbox is also regsitered
1104  * with the FW. Allocate memory for all commands as well.
1105  * This is our big allocator
1106  */
1107 static int
1108 megaraid_alloc_cmd_packets(adapter_t *adapter)
1109 {
1110         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1111         struct pci_dev          *pdev;
1112         unsigned long           align;
1113         scb_t                   *scb;
1114         mbox_ccb_t              *ccb;
1115         struct mraid_pci_blk    *epthru_pci_blk;
1116         struct mraid_pci_blk    *sg_pci_blk;
1117         struct mraid_pci_blk    *mbox_pci_blk;
1118         int                     i;
1119
1120         pdev = adapter->pdev;
1121
1122         /*
1123          * Setup the mailbox
1124          * Allocate the common 16-byte aligned memory for the handshake
1125          * mailbox.
1126          */
1127         raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
1128                         sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
1129
1130         if (!raid_dev->una_mbox64) {
1131                 con_log(CL_ANN, (KERN_WARNING
1132                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1133                         __LINE__));
1134                 return -1;
1135         }
1136         memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
1137
1138         /*
1139          * Align the mailbox at 16-byte boundary
1140          */
1141         raid_dev->mbox  = &raid_dev->una_mbox64->mbox32;
1142
1143         raid_dev->mbox  = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
1144                                 (~0UL ^ 0xFUL));
1145
1146         raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
1147
1148         align = ((void *)raid_dev->mbox -
1149                         ((void *)&raid_dev->una_mbox64->mbox32));
1150
1151         raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1152                         align;
1153
1154         // Allocate memory for commands issued internally
1155         adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
1156                                 &adapter->ibuf_dma_h);
1157         if (!adapter->ibuf) {
1158
1159                 con_log(CL_ANN, (KERN_WARNING
1160                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1161                         __LINE__));
1162
1163                 goto out_free_common_mbox;
1164         }
1165         memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
1166
1167         // Allocate memory for our SCSI Command Blocks and their associated
1168         // memory
1169
1170         /*
1171          * Allocate memory for the base list of scb. Later allocate memory for
1172          * CCBs and embedded components of each CCB and point the pointers in
1173          * scb to the allocated components
1174          * NOTE: The code to allocate SCB will be duplicated in all the LLD
1175          * since the calling routine does not yet know the number of available
1176          * commands.
1177          */
1178         adapter->kscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_SCSI_CMDS,
1179                         GFP_KERNEL);
1180
1181         if (adapter->kscb_list == NULL) {
1182                 con_log(CL_ANN, (KERN_WARNING
1183                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1184                         __LINE__));
1185                 goto out_free_ibuf;
1186         }
1187         memset(adapter->kscb_list, 0, sizeof(scb_t) * MBOX_MAX_SCSI_CMDS);
1188
1189         // memory allocation for our command packets
1190         if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1191                 con_log(CL_ANN, (KERN_WARNING
1192                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1193                         __LINE__));
1194                 goto out_free_scb_list;
1195         }
1196
1197         // Adjust the scb pointers and link in the free pool
1198         epthru_pci_blk  = raid_dev->epthru_pool;
1199         sg_pci_blk      = raid_dev->sg_pool;
1200         mbox_pci_blk    = raid_dev->mbox_pool;
1201
1202         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1203                 scb                     = adapter->kscb_list + i;
1204                 ccb                     = raid_dev->ccb_list + i;
1205
1206                 ccb->mbox       = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1207                 ccb->raw_mbox   = (uint8_t *)ccb->mbox;
1208                 ccb->mbox64     = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1209                 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1210
1211                 // make sure the mailbox is aligned properly
1212                 if (ccb->mbox_dma_h & 0x0F) {
1213                         con_log(CL_ANN, (KERN_CRIT
1214                                 "megaraid mbox: not aligned on 16-bytes\n"));
1215
1216                         goto out_teardown_dma_pools;
1217                 }
1218
1219                 ccb->epthru             = (mraid_epassthru_t *)
1220                                                 epthru_pci_blk[i].vaddr;
1221                 ccb->epthru_dma_h       = epthru_pci_blk[i].dma_addr;
1222                 ccb->pthru              = (mraid_passthru_t *)ccb->epthru;
1223                 ccb->pthru_dma_h        = ccb->epthru_dma_h;
1224
1225
1226                 ccb->sgl64              = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1227                 ccb->sgl_dma_h          = sg_pci_blk[i].dma_addr;
1228                 ccb->sgl32              = (mbox_sgl32 *)ccb->sgl64;
1229
1230                 scb->ccb                = (caddr_t)ccb;
1231                 scb->gp                 = 0;
1232
1233                 scb->sno                = i;    // command index
1234
1235                 scb->scp                = NULL;
1236                 scb->state              = SCB_FREE;
1237                 scb->dma_direction      = PCI_DMA_NONE;
1238                 scb->dma_type           = MRAID_DMA_NONE;
1239                 scb->dev_channel        = -1;
1240                 scb->dev_target         = -1;
1241
1242                 // put scb in the free pool
1243                 list_add_tail(&scb->list, &adapter->kscb_pool);
1244         }
1245
1246         return 0;
1247
1248 out_teardown_dma_pools:
1249         megaraid_mbox_teardown_dma_pools(adapter);
1250 out_free_scb_list:
1251         kfree(adapter->kscb_list);
1252 out_free_ibuf:
1253         pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1254                 adapter->ibuf_dma_h);
1255 out_free_common_mbox:
1256         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1257                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1258
1259         return -1;
1260 }
1261
1262
1263 /**
1264  * megaraid_free_cmd_packets - free memory
1265  * @param adapter       : soft state of the raid controller
1266  *
1267  * Release memory resources allocated for commands
1268  */
1269 static void
1270 megaraid_free_cmd_packets(adapter_t *adapter)
1271 {
1272         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1273
1274         megaraid_mbox_teardown_dma_pools(adapter);
1275
1276         kfree(adapter->kscb_list);
1277
1278         pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1279                 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1280
1281         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1282                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1283         return;
1284 }
1285
1286
1287 /**
1288  * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1289  * @param adapter       : HBA soft state
1290  *
1291  * setup the dma pools for mailbox, passthru and extended passthru structures,
1292  * and scatter-gather lists
1293  */
1294 static int
1295 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1296 {
1297         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1298         struct mraid_pci_blk    *epthru_pci_blk;
1299         struct mraid_pci_blk    *sg_pci_blk;
1300         struct mraid_pci_blk    *mbox_pci_blk;
1301         int                     i;
1302
1303
1304
1305         // Allocate memory for 16-bytes aligned mailboxes
1306         raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1307                                                 adapter->pdev,
1308                                                 sizeof(mbox64_t) + 16,
1309                                                 16, 0);
1310
1311         if (raid_dev->mbox_pool_handle == NULL) {
1312                 goto fail_setup_dma_pool;
1313         }
1314
1315         mbox_pci_blk = raid_dev->mbox_pool;
1316         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1317                 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1318                                                 raid_dev->mbox_pool_handle,
1319                                                 GFP_KERNEL,
1320                                                 &mbox_pci_blk[i].dma_addr);
1321                 if (!mbox_pci_blk[i].vaddr) {
1322                         goto fail_setup_dma_pool;
1323                 }
1324         }
1325
1326         /*
1327          * Allocate memory for each embedded passthru strucuture pointer
1328          * Request for a 128 bytes aligned structure for each passthru command
1329          * structure
1330          * Since passthru and extended passthru commands are exclusive, they
1331          * share common memory pool. Passthru structures piggyback on memory
1332          * allocted to extended passthru since passthru is smaller of the two
1333          */
1334         raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1335                         adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1336
1337         if (raid_dev->epthru_pool_handle == NULL) {
1338                 goto fail_setup_dma_pool;
1339         }
1340
1341         epthru_pci_blk = raid_dev->epthru_pool;
1342         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1343                 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1344                                                 raid_dev->epthru_pool_handle,
1345                                                 GFP_KERNEL,
1346                                                 &epthru_pci_blk[i].dma_addr);
1347                 if (!epthru_pci_blk[i].vaddr) {
1348                         goto fail_setup_dma_pool;
1349                 }
1350         }
1351
1352
1353         // Allocate memory for each scatter-gather list. Request for 512 bytes
1354         // alignment for each sg list
1355         raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1356                                         adapter->pdev,
1357                                         sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1358                                         512, 0);
1359
1360         if (raid_dev->sg_pool_handle == NULL) {
1361                 goto fail_setup_dma_pool;
1362         }
1363
1364         sg_pci_blk = raid_dev->sg_pool;
1365         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1366                 sg_pci_blk[i].vaddr = pci_pool_alloc(
1367                                                 raid_dev->sg_pool_handle,
1368                                                 GFP_KERNEL,
1369                                                 &sg_pci_blk[i].dma_addr);
1370                 if (!sg_pci_blk[i].vaddr) {
1371                         goto fail_setup_dma_pool;
1372                 }
1373         }
1374
1375         return 0;
1376
1377 fail_setup_dma_pool:
1378         megaraid_mbox_teardown_dma_pools(adapter);
1379         return -1;
1380 }
1381
1382
1383 /**
1384  * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1385  * @param adapter       : HBA soft state
1386  *
1387  * teardown the dma pool for mailbox, passthru and extended passthru
1388  * structures, and scatter-gather lists
1389  */
1390 static void
1391 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1392 {
1393         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1394         struct mraid_pci_blk    *epthru_pci_blk;
1395         struct mraid_pci_blk    *sg_pci_blk;
1396         struct mraid_pci_blk    *mbox_pci_blk;
1397         int                     i;
1398
1399
1400         sg_pci_blk = raid_dev->sg_pool;
1401         for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1402                 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1403                         sg_pci_blk[i].dma_addr);
1404         }
1405         if (raid_dev->sg_pool_handle)
1406                 pci_pool_destroy(raid_dev->sg_pool_handle);
1407
1408
1409         epthru_pci_blk = raid_dev->epthru_pool;
1410         for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1411                 pci_pool_free(raid_dev->epthru_pool_handle,
1412                         epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1413         }
1414         if (raid_dev->epthru_pool_handle)
1415                 pci_pool_destroy(raid_dev->epthru_pool_handle);
1416
1417
1418         mbox_pci_blk = raid_dev->mbox_pool;
1419         for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1420                 pci_pool_free(raid_dev->mbox_pool_handle,
1421                         mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1422         }
1423         if (raid_dev->mbox_pool_handle)
1424                 pci_pool_destroy(raid_dev->mbox_pool_handle);
1425
1426         return;
1427 }
1428
1429
1430 /**
1431  * megaraid_alloc_scb - detach and return a scb from the free list
1432  * @adapter     : controller's soft state
1433  *
1434  * return the scb from the head of the free list. NULL if there are none
1435  * available
1436  **/
1437 static inline scb_t *
1438 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1439 {
1440         struct list_head        *head = &adapter->kscb_pool;
1441         scb_t                   *scb = NULL;
1442         unsigned long           flags;
1443
1444         // detach scb from free pool
1445         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1446
1447         if (list_empty(head)) {
1448                 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1449                 return NULL;
1450         }
1451
1452         scb = list_entry(head->next, scb_t, list);
1453         list_del_init(&scb->list);
1454
1455         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1456
1457         scb->state      = SCB_ACTIVE;
1458         scb->scp        = scp;
1459         scb->dma_type   = MRAID_DMA_NONE;
1460
1461         return scb;
1462 }
1463
1464
1465 /**
1466  * megaraid_dealloc_scb - return the scb to the free pool
1467  * @adapter     : controller's soft state
1468  * @scb         : scb to be freed
1469  *
1470  * return the scb back to the free list of scbs. The caller must 'flush' the
1471  * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1472  * NOTE NOTE: Make sure the scb is not on any list before calling this
1473  * routine.
1474  **/
1475 static inline void
1476 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1477 {
1478         unsigned long           flags;
1479
1480         // put scb in the free pool
1481         scb->state      = SCB_FREE;
1482         scb->scp        = NULL;
1483         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1484
1485         list_add(&scb->list, &adapter->kscb_pool);
1486
1487         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1488
1489         return;
1490 }
1491
1492
1493 /**
1494  * megaraid_mbox_mksgl - make the scatter-gather list
1495  * @adapter     - controller's soft state
1496  * @scb         - scsi control block
1497  *
1498  * prepare the scatter-gather list
1499  */
1500 static inline int
1501 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1502 {
1503         struct scatterlist      *sgl;
1504         mbox_ccb_t              *ccb;
1505         struct page             *page;
1506         unsigned long           offset;
1507         struct scsi_cmnd        *scp;
1508         int                     sgcnt;
1509         int                     i;
1510
1511
1512         scp     = scb->scp;
1513         ccb     = (mbox_ccb_t *)scb->ccb;
1514
1515         // no mapping required if no data to be transferred
1516         if (!scp->request_buffer || !scp->request_bufflen)
1517                 return 0;
1518
1519         if (!scp->use_sg) {     /* scatter-gather list not used */
1520
1521                 page = virt_to_page(scp->request_buffer);
1522
1523                 offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK);
1524
1525                 ccb->buf_dma_h = pci_map_page(adapter->pdev, page, offset,
1526                                                   scp->request_bufflen,
1527                                                   scb->dma_direction);
1528                 scb->dma_type = MRAID_DMA_WBUF;
1529
1530                 /*
1531                  * We need to handle special 64-bit commands that need a
1532                  * minimum of 1 SG
1533                  */
1534                 sgcnt = 1;
1535                 ccb->sgl64[0].address   = ccb->buf_dma_h;
1536                 ccb->sgl64[0].length    = scp->request_bufflen;
1537
1538                 return sgcnt;
1539         }
1540
1541         sgl = (struct scatterlist *)scp->request_buffer;
1542
1543         // The number of sg elements returned must not exceed our limit
1544         sgcnt = pci_map_sg(adapter->pdev, sgl, scp->use_sg,
1545                         scb->dma_direction);
1546
1547         if (sgcnt > adapter->sglen) {
1548                 con_log(CL_ANN, (KERN_CRIT
1549                         "megaraid critical: too many sg elements:%d\n",
1550                         sgcnt));
1551                 BUG();
1552         }
1553
1554         scb->dma_type = MRAID_DMA_WSG;
1555
1556         for (i = 0; i < sgcnt; i++, sgl++) {
1557                 ccb->sgl64[i].address   = sg_dma_address(sgl);
1558                 ccb->sgl64[i].length    = sg_dma_len(sgl);
1559         }
1560
1561         // Return count of SG nodes
1562         return sgcnt;
1563 }
1564
1565
1566 /**
1567  * mbox_post_cmd - issue a mailbox command
1568  * @adapter     - controller's soft state
1569  * @scb         - command to be issued
1570  *
1571  * post the command to the controller if mailbox is availble.
1572  */
1573 static inline int
1574 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1575 {
1576         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
1577         mbox64_t        *mbox64;
1578         mbox_t          *mbox;
1579         mbox_ccb_t      *ccb;
1580         unsigned long   flags;
1581         unsigned int    i = 0;
1582
1583
1584         ccb     = (mbox_ccb_t *)scb->ccb;
1585         mbox    = raid_dev->mbox;
1586         mbox64  = raid_dev->mbox64;
1587
1588         /*
1589          * Check for busy mailbox. If it is, return failure - the caller
1590          * should retry later.
1591          */
1592         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1593
1594         if (unlikely(mbox->busy)) {
1595                 do {
1596                         udelay(1);
1597                         i++;
1598                         rmb();
1599                 } while(mbox->busy && (i < max_mbox_busy_wait));
1600
1601                 if (mbox->busy) {
1602
1603                         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1604
1605                         return -1;
1606                 }
1607         }
1608
1609
1610         // Copy this command's mailbox data into "adapter's" mailbox
1611         memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1612         mbox->cmdid = scb->sno;
1613
1614         adapter->outstanding_cmds++;
1615
1616         if (scb->dma_direction == PCI_DMA_TODEVICE) {
1617                 if (!scb->scp->use_sg) {        // sg list not used
1618                         pci_dma_sync_single_for_device(adapter->pdev,
1619                                         ccb->buf_dma_h,
1620                                         scb->scp->request_bufflen,
1621                                         PCI_DMA_TODEVICE);
1622                 }
1623                 else {
1624                         pci_dma_sync_sg_for_device(adapter->pdev,
1625                                 scb->scp->request_buffer,
1626                                 scb->scp->use_sg, PCI_DMA_TODEVICE);
1627                 }
1628         }
1629
1630         mbox->busy      = 1;    // Set busy
1631         mbox->poll      = 0;
1632         mbox->ack       = 0;
1633         wmb();
1634
1635         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1636
1637         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1638
1639         return 0;
1640 }
1641
1642
1643 /**
1644  * megaraid_queue_command - generic queue entry point for all LLDs
1645  * @scp         : pointer to the scsi command to be executed
1646  * @done        : callback routine to be called after the cmd has be completed
1647  *
1648  * Queue entry point for mailbox based controllers.
1649  */
1650 static int
1651 megaraid_queue_command(struct scsi_cmnd *scp, void (* done)(struct scsi_cmnd *))
1652 {
1653         adapter_t       *adapter;
1654         scb_t           *scb;
1655         int             if_busy;
1656
1657         adapter         = SCP2ADAPTER(scp);
1658         scp->scsi_done  = done;
1659         scp->result     = 0;
1660
1661         assert_spin_locked(adapter->host_lock);
1662
1663         spin_unlock(adapter->host_lock);
1664
1665         /*
1666          * Allocate and build a SCB request
1667          * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1668          * not allocate scb. We will return non-zero status in that case.
1669          * NOTE: scb can be null even though certain commands completed
1670          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1671          * return 0 in that case, and we would do the callback right away.
1672          */
1673         if_busy = 0;
1674         scb     = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1675
1676         if (scb) {
1677                 megaraid_mbox_runpendq(adapter, scb);
1678         }
1679
1680         spin_lock(adapter->host_lock);
1681
1682         if (!scb) {     // command already completed
1683                 done(scp);
1684                 return 0;
1685         }
1686
1687         return if_busy;
1688 }
1689
1690
1691 /**
1692  * megaraid_mbox_build_cmd - transform the mid-layer scsi command to megaraid
1693  * firmware lingua
1694  * @adapter     - controller's soft state
1695  * @scp         - mid-layer scsi command pointer
1696  * @busy        - set if request could not be completed because of lack of
1697  *              resources
1698  *
1699  * convert the command issued by mid-layer to format understood by megaraid
1700  * firmware. We also complete certain command without sending them to firmware
1701  */
1702 static scb_t *
1703 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1704 {
1705         mraid_device_t          *rdev = ADAP2RAIDDEV(adapter);
1706         int                     channel;
1707         int                     target;
1708         int                     islogical;
1709         mbox_ccb_t              *ccb;
1710         mraid_passthru_t        *pthru;
1711         mbox64_t                *mbox64;
1712         mbox_t                  *mbox;
1713         scb_t                   *scb;
1714         char                    skip[] = "skipping";
1715         char                    scan[] = "scanning";
1716         char                    *ss;
1717
1718
1719         /*
1720          * Get the appropriate device map for the device this command is
1721          * intended for
1722          */
1723         MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1724
1725         /*
1726          * Logical drive commands
1727          */
1728         if (islogical) {
1729                 switch (scp->cmnd[0]) {
1730                 case TEST_UNIT_READY:
1731                         /*
1732                          * Do we support clustering and is the support enabled
1733                          * If no, return success always
1734                          */
1735                         if (!adapter->ha) {
1736                                 scp->result = (DID_OK << 16);
1737                                 return NULL;
1738                         }
1739
1740                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1741                                 scp->result = (DID_ERROR << 16);
1742                                 *busy = 1;
1743                                 return NULL;
1744                         }
1745
1746                         scb->dma_direction      = scp->sc_data_direction;
1747                         scb->dev_channel        = 0xFF;
1748                         scb->dev_target         = target;
1749                         ccb                     = (mbox_ccb_t *)scb->ccb;
1750
1751                         /*
1752                          * The command id will be provided by the command
1753                          * issuance routine
1754                          */
1755                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1756                         ccb->raw_mbox[2]        = RESERVATION_STATUS;
1757                         ccb->raw_mbox[3]        = target;
1758
1759                         return scb;
1760
1761                 case MODE_SENSE:
1762                         if (scp->use_sg) {
1763                                 struct scatterlist      *sgl;
1764                                 caddr_t                 vaddr;
1765
1766                                 sgl = (struct scatterlist *)scp->request_buffer;
1767                                 if (sgl->page) {
1768                                         vaddr = (caddr_t)
1769                                                 (page_address((&sgl[0])->page)
1770                                                 + (&sgl[0])->offset);
1771
1772                                         memset(vaddr, 0, scp->cmnd[4]);
1773                                 }
1774                                 else {
1775                                         con_log(CL_ANN, (KERN_WARNING
1776                                         "megaraid mailbox: invalid sg:%d\n",
1777                                         __LINE__));
1778                                 }
1779                         }
1780                         else {
1781                                 memset(scp->request_buffer, 0, scp->cmnd[4]);
1782                         }
1783                         scp->result = (DID_OK << 16);
1784                         return NULL;
1785
1786                 case INQUIRY:
1787                         /*
1788                          * Display the channel scan for logical drives
1789                          * Do not display scan for a channel if already done.
1790                          */
1791                         if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1792
1793                                 con_log(CL_ANN, (KERN_INFO
1794                                         "scsi[%d]: scanning scsi channel %d",
1795                                         adapter->host->host_no,
1796                                         SCP2CHANNEL(scp)));
1797
1798                                 con_log(CL_ANN, (
1799                                         " [virtual] for logical drives\n"));
1800
1801                                 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1802                         }
1803
1804                         /* Fall through */
1805
1806                 case READ_CAPACITY:
1807                         /*
1808                          * Do not allow LUN > 0 for logical drives and
1809                          * requests for more than 40 logical drives
1810                          */
1811                         if (SCP2LUN(scp)) {
1812                                 scp->result = (DID_BAD_TARGET << 16);
1813                                 return NULL;
1814                         }
1815                         if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1816                                 scp->result = (DID_BAD_TARGET << 16);
1817                                 return NULL;
1818                         }
1819
1820
1821                         /* Allocate a SCB and initialize passthru */
1822                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1823                                 scp->result = (DID_ERROR << 16);
1824                                 *busy = 1;
1825                                 return NULL;
1826                         }
1827
1828                         ccb                     = (mbox_ccb_t *)scb->ccb;
1829                         scb->dev_channel        = 0xFF;
1830                         scb->dev_target         = target;
1831                         pthru                   = ccb->pthru;
1832                         mbox                    = ccb->mbox;
1833                         mbox64                  = ccb->mbox64;
1834
1835                         pthru->timeout          = 0;
1836                         pthru->ars              = 1;
1837                         pthru->reqsenselen      = 14;
1838                         pthru->islogical        = 1;
1839                         pthru->logdrv           = target;
1840                         pthru->cdblen           = scp->cmd_len;
1841                         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1842
1843                         mbox->cmd               = MBOXCMD_PASSTHRU64;
1844                         scb->dma_direction      = scp->sc_data_direction;
1845
1846                         pthru->dataxferlen      = scp->request_bufflen;
1847                         pthru->dataxferaddr     = ccb->sgl_dma_h;
1848                         pthru->numsge           = megaraid_mbox_mksgl(adapter,
1849                                                         scb);
1850
1851                         mbox->xferaddr          = 0xFFFFFFFF;
1852                         mbox64->xferaddr_lo     = (uint32_t )ccb->pthru_dma_h;
1853                         mbox64->xferaddr_hi     = 0;
1854
1855                         return scb;
1856
1857                 case READ_6:
1858                 case WRITE_6:
1859                 case READ_10:
1860                 case WRITE_10:
1861                 case READ_12:
1862                 case WRITE_12:
1863
1864                         /*
1865                          * Allocate a SCB and initialize mailbox
1866                          */
1867                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1868                                 scp->result = (DID_ERROR << 16);
1869                                 *busy = 1;
1870                                 return NULL;
1871                         }
1872                         ccb                     = (mbox_ccb_t *)scb->ccb;
1873                         scb->dev_channel        = 0xFF;
1874                         scb->dev_target         = target;
1875                         mbox                    = ccb->mbox;
1876                         mbox64                  = ccb->mbox64;
1877                         mbox->logdrv            = target;
1878
1879                         /*
1880                          * A little HACK: 2nd bit is zero for all scsi read
1881                          * commands and is set for all scsi write commands
1882                          */
1883                         mbox->cmd = (scp->cmnd[0] & 0x02) ?  MBOXCMD_LWRITE64:
1884                                         MBOXCMD_LREAD64 ;
1885
1886                         /*
1887                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1888                          */
1889                         if (scp->cmd_len == 6) {
1890                                 mbox->numsectors = (uint32_t)scp->cmnd[4];
1891                                 mbox->lba =
1892                                         ((uint32_t)scp->cmnd[1] << 16)  |
1893                                         ((uint32_t)scp->cmnd[2] << 8)   |
1894                                         (uint32_t)scp->cmnd[3];
1895
1896                                 mbox->lba &= 0x1FFFFF;
1897                         }
1898
1899                         /*
1900                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1901                          */
1902                         else if (scp->cmd_len == 10) {
1903                                 mbox->numsectors =
1904                                         (uint32_t)scp->cmnd[8] |
1905                                         ((uint32_t)scp->cmnd[7] << 8);
1906                                 mbox->lba =
1907                                         ((uint32_t)scp->cmnd[2] << 24) |
1908                                         ((uint32_t)scp->cmnd[3] << 16) |
1909                                         ((uint32_t)scp->cmnd[4] << 8) |
1910                                         (uint32_t)scp->cmnd[5];
1911                         }
1912
1913                         /*
1914                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1915                          */
1916                         else if (scp->cmd_len == 12) {
1917                                 mbox->lba =
1918                                         ((uint32_t)scp->cmnd[2] << 24) |
1919                                         ((uint32_t)scp->cmnd[3] << 16) |
1920                                         ((uint32_t)scp->cmnd[4] << 8) |
1921                                         (uint32_t)scp->cmnd[5];
1922
1923                                 mbox->numsectors =
1924                                         ((uint32_t)scp->cmnd[6] << 24) |
1925                                         ((uint32_t)scp->cmnd[7] << 16) |
1926                                         ((uint32_t)scp->cmnd[8] << 8) |
1927                                         (uint32_t)scp->cmnd[9];
1928                         }
1929                         else {
1930                                 con_log(CL_ANN, (KERN_WARNING
1931                                         "megaraid: unsupported CDB length\n"));
1932
1933                                 megaraid_dealloc_scb(adapter, scb);
1934
1935                                 scp->result = (DID_ERROR << 16);
1936                                 return NULL;
1937                         }
1938
1939                         scb->dma_direction = scp->sc_data_direction;
1940
1941                         // Calculate Scatter-Gather info
1942                         mbox64->xferaddr_lo     = (uint32_t )ccb->sgl_dma_h;
1943                         mbox->numsge            = megaraid_mbox_mksgl(adapter,
1944                                                         scb);
1945                         mbox->xferaddr          = 0xFFFFFFFF;
1946                         mbox64->xferaddr_hi     = 0;
1947
1948                         return scb;
1949
1950                 case RESERVE:
1951                 case RELEASE:
1952                         /*
1953                          * Do we support clustering and is the support enabled
1954                          */
1955                         if (!adapter->ha) {
1956                                 scp->result = (DID_BAD_TARGET << 16);
1957                                 return NULL;
1958                         }
1959
1960                         /*
1961                          * Allocate a SCB and initialize mailbox
1962                          */
1963                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1964                                 scp->result = (DID_ERROR << 16);
1965                                 *busy = 1;
1966                                 return NULL;
1967                         }
1968
1969                         ccb                     = (mbox_ccb_t *)scb->ccb;
1970                         scb->dev_channel        = 0xFF;
1971                         scb->dev_target         = target;
1972                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1973                         ccb->raw_mbox[2]        =  (scp->cmnd[0] == RESERVE) ?
1974                                                 RESERVE_LD : RELEASE_LD;
1975
1976                         ccb->raw_mbox[3]        = target;
1977                         scb->dma_direction      = scp->sc_data_direction;
1978
1979                         return scb;
1980
1981                 default:
1982                         scp->result = (DID_BAD_TARGET << 16);
1983                         return NULL;
1984                 }
1985         }
1986         else { // Passthru device commands
1987
1988                 // Do not allow access to target id > 15 or LUN > 7
1989                 if (target > 15 || SCP2LUN(scp) > 7) {
1990                         scp->result = (DID_BAD_TARGET << 16);
1991                         return NULL;
1992                 }
1993
1994                 // if fast load option was set and scan for last device is
1995                 // over, reset the fast_load flag so that during a possible
1996                 // next scan, devices can be made available
1997                 if (rdev->fast_load && (target == 15) &&
1998                         (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1999
2000                         con_log(CL_ANN, (KERN_INFO
2001                         "megaraid[%d]: physical device scan re-enabled\n",
2002                                 adapter->host->host_no));
2003                         rdev->fast_load = 0;
2004                 }
2005
2006                 /*
2007                  * Display the channel scan for physical devices
2008                  */
2009                 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
2010
2011                         ss = rdev->fast_load ? skip : scan;
2012
2013                         con_log(CL_ANN, (KERN_INFO
2014                                 "scsi[%d]: %s scsi channel %d [Phy %d]",
2015                                 adapter->host->host_no, ss, SCP2CHANNEL(scp),
2016                                 channel));
2017
2018                         con_log(CL_ANN, (
2019                                 " for non-raid devices\n"));
2020
2021                         rdev->last_disp |= (1L << SCP2CHANNEL(scp));
2022                 }
2023
2024                 // disable channel sweep if fast load option given
2025                 if (rdev->fast_load) {
2026                         scp->result = (DID_BAD_TARGET << 16);
2027                         return NULL;
2028                 }
2029
2030                 // Allocate a SCB and initialize passthru
2031                 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
2032                         scp->result = (DID_ERROR << 16);
2033                         *busy = 1;
2034                         return NULL;
2035                 }
2036
2037                 ccb                     = (mbox_ccb_t *)scb->ccb;
2038                 scb->dev_channel        = channel;
2039                 scb->dev_target         = target;
2040                 scb->dma_direction      = scp->sc_data_direction;
2041                 mbox                    = ccb->mbox;
2042                 mbox64                  = ccb->mbox64;
2043
2044                 // Does this firmware support extended CDBs
2045                 if (adapter->max_cdb_sz == 16) {
2046                         mbox->cmd               = MBOXCMD_EXTPTHRU;
2047
2048                         megaraid_mbox_prepare_epthru(adapter, scb, scp);
2049
2050                         mbox64->xferaddr_lo     = (uint32_t)ccb->epthru_dma_h;
2051                         mbox64->xferaddr_hi     = 0;
2052                         mbox->xferaddr          = 0xFFFFFFFF;
2053                 }
2054                 else {
2055                         mbox->cmd = MBOXCMD_PASSTHRU64;
2056
2057                         megaraid_mbox_prepare_pthru(adapter, scb, scp);
2058
2059                         mbox64->xferaddr_lo     = (uint32_t)ccb->pthru_dma_h;
2060                         mbox64->xferaddr_hi     = 0;
2061                         mbox->xferaddr          = 0xFFFFFFFF;
2062                 }
2063                 return scb;
2064         }
2065
2066         // NOT REACHED
2067 }
2068
2069
2070 /**
2071  * megaraid_mbox_runpendq - execute commands queued in the pending queue
2072  * @adapter     : controller's soft state
2073  * @scb         : SCB to be queued in the pending list
2074  *
2075  * scan the pending list for commands which are not yet issued and try to
2076  * post to the controller. The SCB can be a null pointer, which would indicate
2077  * no SCB to be queue, just try to execute the ones in the pending list.
2078  *
2079  * NOTE: We do not actually traverse the pending list. The SCBs are plucked
2080  * out from the head of the pending list. If it is successfully issued, the
2081  * next SCB is at the head now.
2082  */
2083 static void
2084 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
2085 {
2086         scb_t                   *scb;
2087         unsigned long           flags;
2088
2089         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2090
2091         if (scb_q) {
2092                 scb_q->state = SCB_PENDQ;
2093                 list_add_tail(&scb_q->list, &adapter->pend_list);
2094         }
2095
2096         // if the adapter in not in quiescent mode, post the commands to FW
2097         if (adapter->quiescent) {
2098                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2099                 return;
2100         }
2101
2102         while (!list_empty(&adapter->pend_list)) {
2103
2104                 assert_spin_locked(PENDING_LIST_LOCK(adapter));
2105
2106                 scb = list_entry(adapter->pend_list.next, scb_t, list);
2107
2108                 // remove the scb from the pending list and try to
2109                 // issue. If we are unable to issue it, put back in
2110                 // the pending list and return
2111
2112                 list_del_init(&scb->list);
2113
2114                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2115
2116                 // if mailbox was busy, return SCB back to pending
2117                 // list. Make sure to add at the head, since that's
2118                 // where it would have been removed from
2119
2120                 scb->state = SCB_ISSUED;
2121
2122                 if (mbox_post_cmd(adapter, scb) != 0) {
2123
2124                         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2125
2126                         scb->state = SCB_PENDQ;
2127
2128                         list_add(&scb->list, &adapter->pend_list);
2129
2130                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2131                                 flags);
2132
2133                         return;
2134                 }
2135
2136                 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2137         }
2138
2139         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2140
2141
2142         return;
2143 }
2144
2145
2146 /**
2147  * megaraid_mbox_prepare_pthru - prepare a command for physical devices
2148  * @adapter     - pointer to controller's soft state
2149  * @scb         - scsi control block
2150  * @scp         - scsi command from the mid-layer
2151  *
2152  * prepare a command for the scsi physical devices
2153  */
2154 static void
2155 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
2156                 struct scsi_cmnd *scp)
2157 {
2158         mbox_ccb_t              *ccb;
2159         mraid_passthru_t        *pthru;
2160         uint8_t                 channel;
2161         uint8_t                 target;
2162
2163         ccb     = (mbox_ccb_t *)scb->ccb;
2164         pthru   = ccb->pthru;
2165         channel = scb->dev_channel;
2166         target  = scb->dev_target;
2167
2168         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2169         pthru->timeout          = 4;    
2170         pthru->ars              = 1;
2171         pthru->islogical        = 0;
2172         pthru->channel          = 0;
2173         pthru->target           = (channel << 4) | target;
2174         pthru->logdrv           = SCP2LUN(scp);
2175         pthru->reqsenselen      = 14;
2176         pthru->cdblen           = scp->cmd_len;
2177
2178         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2179
2180         if (scp->request_bufflen) {
2181                 pthru->dataxferlen      = scp->request_bufflen;
2182                 pthru->dataxferaddr     = ccb->sgl_dma_h;
2183                 pthru->numsge           = megaraid_mbox_mksgl(adapter, scb);
2184         }
2185         else {
2186                 pthru->dataxferaddr     = 0;
2187                 pthru->dataxferlen      = 0;
2188                 pthru->numsge           = 0;
2189         }
2190         return;
2191 }
2192
2193
2194 /**
2195  * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2196  * @adapter     - pointer to controller's soft state
2197  * @scb         - scsi control block
2198  * @scp         - scsi command from the mid-layer
2199  *
2200  * prepare a command for the scsi physical devices. This rountine prepares
2201  * commands for devices which can take extended CDBs (>10 bytes)
2202  */
2203 static void
2204 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2205                 struct scsi_cmnd *scp)
2206 {
2207         mbox_ccb_t              *ccb;
2208         mraid_epassthru_t       *epthru;
2209         uint8_t                 channel;
2210         uint8_t                 target;
2211
2212         ccb     = (mbox_ccb_t *)scb->ccb;
2213         epthru  = ccb->epthru;
2214         channel = scb->dev_channel;
2215         target  = scb->dev_target;
2216
2217         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2218         epthru->timeout         = 4;    
2219         epthru->ars             = 1;
2220         epthru->islogical       = 0;
2221         epthru->channel         = 0;
2222         epthru->target          = (channel << 4) | target;
2223         epthru->logdrv          = SCP2LUN(scp);
2224         epthru->reqsenselen     = 14;
2225         epthru->cdblen          = scp->cmd_len;
2226
2227         memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2228
2229         if (scp->request_bufflen) {
2230                 epthru->dataxferlen     = scp->request_bufflen;
2231                 epthru->dataxferaddr    = ccb->sgl_dma_h;
2232                 epthru->numsge          = megaraid_mbox_mksgl(adapter, scb);
2233         }
2234         else {
2235                 epthru->dataxferaddr    = 0;
2236                 epthru->dataxferlen     = 0;
2237                 epthru->numsge          = 0;
2238         }
2239         return;
2240 }
2241
2242
2243 /**
2244  * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2245  * @adapter     - controller's soft state
2246  *
2247  * Interrupt ackrowledgement sequence for memory mapped HBAs. Find out the
2248  * completed command and put them on the completed list for later processing.
2249  *
2250  * Returns:     1 if the interrupt is valid, 0 otherwise
2251  */
2252 static inline int
2253 megaraid_ack_sequence(adapter_t *adapter)
2254 {
2255         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2256         mbox_t                  *mbox;
2257         scb_t                   *scb;
2258         uint8_t                 nstatus;
2259         uint8_t                 completed[MBOX_MAX_FIRMWARE_STATUS];
2260         struct list_head        clist;
2261         int                     handled;
2262         uint32_t                dword;
2263         unsigned long           flags;
2264         int                     i, j;
2265
2266
2267         mbox    = raid_dev->mbox;
2268
2269         // move the SCBs from the firmware completed array to our local list
2270         INIT_LIST_HEAD(&clist);
2271
2272         // loop till F/W has more commands for us to complete
2273         handled = 0;
2274         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2275         do {
2276                 /*
2277                  * Check if a valid interrupt is pending. If found, force the
2278                  * interrupt line low.
2279                  */
2280                 dword = RDOUTDOOR(raid_dev);
2281                 if (dword != 0x10001234) break;
2282
2283                 handled = 1;
2284
2285                 WROUTDOOR(raid_dev, 0x10001234);
2286
2287                 nstatus = 0;
2288                 // wait for valid numstatus to post
2289                 for (i = 0; i < 0xFFFFF; i++) {
2290                         if (mbox->numstatus != 0xFF) {
2291                                 nstatus = mbox->numstatus;
2292                                 break;
2293                         }
2294                         rmb();
2295                 }
2296                 mbox->numstatus = 0xFF;
2297
2298                 adapter->outstanding_cmds -= nstatus;
2299
2300                 for (i = 0; i < nstatus; i++) {
2301
2302                         // wait for valid command index to post
2303                         for (j = 0; j < 0xFFFFF; j++) {
2304                                 if (mbox->completed[i] != 0xFF) break;
2305                                 rmb();
2306                         }
2307                         completed[i]            = mbox->completed[i];
2308                         mbox->completed[i]      = 0xFF;
2309
2310                         if (completed[i] == 0xFF) {
2311                                 con_log(CL_ANN, (KERN_CRIT
2312                                 "megaraid: command posting timed out\n"));
2313
2314                                 BUG();
2315                                 continue;
2316                         }
2317
2318                         // Get SCB associated with this command id
2319                         if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2320                                 // a cmm command
2321                                 scb = adapter->uscb_list + (completed[i] -
2322                                                 MBOX_MAX_SCSI_CMDS);
2323                         }
2324                         else {
2325                                 // an os command
2326                                 scb = adapter->kscb_list + completed[i];
2327                         }
2328
2329                         scb->status = mbox->status;
2330                         list_add_tail(&scb->list, &clist);
2331                 }
2332
2333                 // Acknowledge interrupt
2334                 WRINDOOR(raid_dev, 0x02);
2335
2336         } while(1);
2337
2338         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2339
2340
2341         // put the completed commands in the completed list. DPC would
2342         // complete these commands later
2343         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2344
2345         list_splice(&clist, &adapter->completed_list);
2346
2347         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2348
2349
2350         // schedule the DPC if there is some work for it
2351         if (handled)
2352                 tasklet_schedule(&adapter->dpc_h);
2353
2354         return handled;
2355 }
2356
2357
2358 /**
2359  * megaraid_isr - isr for memory based mailbox based controllers
2360  * @irq         - irq
2361  * @devp        - pointer to our soft state
2362  * @regs        - unused
2363  *
2364  * Interrupt service routine for memory-mapped mailbox controllers.
2365  */
2366 static irqreturn_t
2367 megaraid_isr(int irq, void *devp, struct pt_regs *regs)
2368 {
2369         adapter_t       *adapter = devp;
2370         int             handled;
2371
2372         handled = megaraid_ack_sequence(adapter);
2373
2374         /* Loop through any pending requests */
2375         if (!adapter->quiescent) {
2376                 megaraid_mbox_runpendq(adapter, NULL);
2377         }
2378
2379         return IRQ_RETVAL(handled);
2380 }
2381
2382
2383 /**
2384  * megaraid_mbox_sync_scb - sync kernel buffers
2385  * @adapter     : controller's soft state
2386  * @scb         : pointer to the resource packet
2387  *
2388  * DMA sync if required.
2389  */
2390 static inline void
2391 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2392 {
2393         mbox_ccb_t      *ccb;
2394
2395         ccb     = (mbox_ccb_t *)scb->ccb;
2396
2397         switch (scb->dma_type) {
2398
2399         case MRAID_DMA_WBUF:
2400                 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2401                         pci_dma_sync_single_for_cpu(adapter->pdev,
2402                                         ccb->buf_dma_h,
2403                                         scb->scp->request_bufflen,
2404                                         PCI_DMA_FROMDEVICE);
2405                 }
2406
2407                 pci_unmap_page(adapter->pdev, ccb->buf_dma_h,
2408                         scb->scp->request_bufflen, scb->dma_direction);
2409
2410                 break;
2411
2412         case MRAID_DMA_WSG:
2413                 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2414                         pci_dma_sync_sg_for_cpu(adapter->pdev,
2415                                         scb->scp->request_buffer,
2416                                         scb->scp->use_sg, PCI_DMA_FROMDEVICE);
2417                 }
2418
2419                 pci_unmap_sg(adapter->pdev, scb->scp->request_buffer,
2420                         scb->scp->use_sg, scb->dma_direction);
2421
2422                 break;
2423
2424         default:
2425                 break;
2426         }
2427
2428         return;
2429 }
2430
2431
2432 /**
2433  * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2434  * @devp        : pointer to HBA soft state
2435  *
2436  * Pick up the commands from the completed list and send back to the owners.
2437  * This is a reentrant function and does not assume any locks are held while
2438  * it is being called.
2439  */
2440 static void
2441 megaraid_mbox_dpc(unsigned long devp)
2442 {
2443         adapter_t               *adapter = (adapter_t *)devp;
2444         mraid_device_t          *raid_dev;
2445         struct list_head        clist;
2446         struct scatterlist      *sgl;
2447         scb_t                   *scb;
2448         scb_t                   *tmp;
2449         struct scsi_cmnd        *scp;
2450         mraid_passthru_t        *pthru;
2451         mraid_epassthru_t       *epthru;
2452         mbox_ccb_t              *ccb;
2453         int                     islogical;
2454         int                     pdev_index;
2455         int                     pdev_state;
2456         mbox_t                  *mbox;
2457         unsigned long           flags;
2458         uint8_t                 c;
2459         int                     status;
2460
2461
2462         if (!adapter) return;
2463
2464         raid_dev = ADAP2RAIDDEV(adapter);
2465
2466         // move the SCBs from the completed list to our local list
2467         INIT_LIST_HEAD(&clist);
2468
2469         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2470
2471         list_splice_init(&adapter->completed_list, &clist);
2472
2473         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2474
2475
2476         list_for_each_entry_safe(scb, tmp, &clist, list) {
2477
2478                 status          = scb->status;
2479                 scp             = scb->scp;
2480                 ccb             = (mbox_ccb_t *)scb->ccb;
2481                 pthru           = ccb->pthru;
2482                 epthru          = ccb->epthru;
2483                 mbox            = ccb->mbox;
2484
2485                 // Make sure f/w has completed a valid command
2486                 if (scb->state != SCB_ISSUED) {
2487                         con_log(CL_ANN, (KERN_CRIT
2488                         "megaraid critical err: invalid command %d:%d:%p\n",
2489                                 scb->sno, scb->state, scp));
2490                         BUG();
2491                         continue;       // Must never happen!
2492                 }
2493
2494                 // check for the management command and complete it right away
2495                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2496                         scb->state      = SCB_FREE;
2497                         scb->status     = status;
2498
2499                         // remove from local clist
2500                         list_del_init(&scb->list);
2501
2502                         megaraid_mbox_mm_done(adapter, scb);
2503
2504                         continue;
2505                 }
2506
2507                 // Was an abort issued for this command earlier
2508                 if (scb->state & SCB_ABORT) {
2509                         con_log(CL_ANN, (KERN_NOTICE
2510                         "megaraid: aborted cmd %lx[%x] completed\n",
2511                                 scp->serial_number, scb->sno));
2512                 }
2513
2514                 /*
2515                  * If the inquiry came of a disk drive which is not part of
2516                  * any RAID array, expose it to the kernel. For this to be
2517                  * enabled, user must set the "megaraid_expose_unconf_disks"
2518                  * flag to 1 by specifying it on module parameter list.
2519                  * This would enable data migration off drives from other
2520                  * configurations.
2521                  */
2522                 islogical = MRAID_IS_LOGICAL(adapter, scp);
2523                 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2524                                 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2525
2526                         if (scp->use_sg) {
2527                                 sgl = (struct scatterlist *)
2528                                         scp->request_buffer;
2529
2530                                 if (sgl->page) {
2531                                         c = *(unsigned char *)
2532                                         (page_address((&sgl[0])->page) +
2533                                                 (&sgl[0])->offset);
2534                                 }
2535                                 else {
2536                                         con_log(CL_ANN, (KERN_WARNING
2537                                         "megaraid mailbox: invalid sg:%d\n",
2538                                         __LINE__));
2539                                         c = 0;
2540                                 }
2541                         }
2542                         else {
2543                                 c = *(uint8_t *)scp->request_buffer;
2544                         }
2545
2546                         if ((c & 0x1F ) == TYPE_DISK) {
2547                                 pdev_index = (scb->dev_channel * 16) +
2548                                         scb->dev_target;
2549                                 pdev_state =
2550                                         raid_dev->pdrv_state[pdev_index] & 0x0F;
2551
2552                                 if (pdev_state == PDRV_ONLINE           ||
2553                                         pdev_state == PDRV_FAILED       ||
2554                                         pdev_state == PDRV_RBLD         ||
2555                                         pdev_state == PDRV_HOTSPARE     ||
2556                                         megaraid_expose_unconf_disks == 0) {
2557
2558                                         status = 0xF0;
2559                                 }
2560                         }
2561                 }
2562
2563                 // Convert MegaRAID status to Linux error code
2564                 switch (status) {
2565
2566                 case 0x00:
2567
2568                         scp->result = (DID_OK << 16);
2569                         break;
2570
2571                 case 0x02:
2572
2573                         /* set sense_buffer and result fields */
2574                         if (mbox->cmd == MBOXCMD_PASSTHRU ||
2575                                 mbox->cmd == MBOXCMD_PASSTHRU64) {
2576
2577                                 memcpy(scp->sense_buffer, pthru->reqsensearea,
2578                                                 14);
2579
2580                                 scp->result = DRIVER_SENSE << 24 |
2581                                         DID_OK << 16 | CHECK_CONDITION << 1;
2582                         }
2583                         else {
2584                                 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2585
2586                                         memcpy(scp->sense_buffer,
2587                                                 epthru->reqsensearea, 14);
2588
2589                                         scp->result = DRIVER_SENSE << 24 |
2590                                                 DID_OK << 16 |
2591                                                 CHECK_CONDITION << 1;
2592                                 } else {
2593                                         scp->sense_buffer[0] = 0x70;
2594                                         scp->sense_buffer[2] = ABORTED_COMMAND;
2595                                         scp->result = CHECK_CONDITION << 1;
2596                                 }
2597                         }
2598                         break;
2599
2600                 case 0x08:
2601
2602                         scp->result = DID_BUS_BUSY << 16 | status;
2603                         break;
2604
2605                 default:
2606
2607                         /*
2608                          * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2609                          * failed
2610                          */
2611                         if (scp->cmnd[0] == TEST_UNIT_READY) {
2612                                 scp->result = DID_ERROR << 16 |
2613                                         RESERVATION_CONFLICT << 1;
2614                         }
2615                         else
2616                         /*
2617                          * Error code returned is 1 if Reserve or Release
2618                          * failed or the input parameter is invalid
2619                          */
2620                         if (status == 1 && (scp->cmnd[0] == RESERVE ||
2621                                          scp->cmnd[0] == RELEASE)) {
2622
2623                                 scp->result = DID_ERROR << 16 |
2624                                         RESERVATION_CONFLICT << 1;
2625                         }
2626                         else {
2627                                 scp->result = DID_BAD_TARGET << 16 | status;
2628                         }
2629                 }
2630
2631                 // print a debug message for all failed commands
2632                 if (status) {
2633                         megaraid_mbox_display_scb(adapter, scb);
2634                 }
2635
2636                 // Free our internal resources and call the mid-layer callback
2637                 // routine
2638                 megaraid_mbox_sync_scb(adapter, scb);
2639
2640                 // remove from local clist
2641                 list_del_init(&scb->list);
2642
2643                 // put back in free list
2644                 megaraid_dealloc_scb(adapter, scb);
2645
2646                 // send the scsi packet back to kernel
2647                 spin_lock(adapter->host_lock);
2648                 scp->scsi_done(scp);
2649                 spin_unlock(adapter->host_lock);
2650         }
2651
2652         return;
2653 }
2654
2655
2656 /**
2657  * megaraid_abort_handler - abort the scsi command
2658  * @scp         : command to be aborted
2659  *
2660  * Abort a previous SCSI request. Only commands on the pending list can be
2661  * aborted. All the commands issued to the F/W must complete.
2662  **/
2663 static int
2664 megaraid_abort_handler(struct scsi_cmnd *scp)
2665 {
2666         adapter_t               *adapter;
2667         mraid_device_t          *raid_dev;
2668         scb_t                   *scb;
2669         scb_t                   *tmp;
2670         int                     found;
2671         unsigned long           flags;
2672         int                     i;
2673
2674
2675         adapter         = SCP2ADAPTER(scp);
2676         raid_dev        = ADAP2RAIDDEV(adapter);
2677
2678         assert_spin_locked(adapter->host_lock);
2679
2680         con_log(CL_ANN, (KERN_WARNING
2681                 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2682                 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2683                 SCP2TARGET(scp), SCP2LUN(scp)));
2684
2685         // If FW has stopped responding, simply return failure
2686         if (raid_dev->hw_error) {
2687                 con_log(CL_ANN, (KERN_NOTICE
2688                         "megaraid: hw error, not aborting\n"));
2689                 return FAILED;
2690         }
2691
2692         // There might a race here, where the command was completed by the
2693         // firmware and now it is on the completed list. Before we could
2694         // complete the command to the kernel in dpc, the abort came.
2695         // Find out if this is the case to avoid the race.
2696         scb = NULL;
2697         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2698         list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2699
2700                 if (scb->scp == scp) {  // Found command
2701
2702                         list_del_init(&scb->list);      // from completed list
2703
2704                         con_log(CL_ANN, (KERN_WARNING
2705                         "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2706                                 scp->serial_number, scb->sno,
2707                                 scb->dev_channel, scb->dev_target));
2708
2709                         scp->result = (DID_ABORT << 16);
2710                         scp->scsi_done(scp);
2711
2712                         megaraid_dealloc_scb(adapter, scb);
2713
2714                         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2715                                 flags);
2716
2717                         return SUCCESS;
2718                 }
2719         }
2720         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2721
2722
2723         // Find out if this command is still on the pending list. If it is and
2724         // was never issued, abort and return success. If the command is owned
2725         // by the firmware, we must wait for it to complete by the FW.
2726         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2727         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2728
2729                 if (scb->scp == scp) {  // Found command
2730
2731                         list_del_init(&scb->list);      // from pending list
2732
2733                         ASSERT(!(scb->state & SCB_ISSUED));
2734
2735                         con_log(CL_ANN, (KERN_WARNING
2736                                 "megaraid abort: %ld[%d:%d], driver owner\n",
2737                                 scp->serial_number, scb->dev_channel,
2738                                 scb->dev_target));
2739
2740                         scp->result = (DID_ABORT << 16);
2741                         scp->scsi_done(scp);
2742
2743                         megaraid_dealloc_scb(adapter, scb);
2744
2745                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2746                                 flags);
2747
2748                         return SUCCESS;
2749                 }
2750         }
2751         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2752
2753
2754         // Check do we even own this command, in which case this would be
2755         // owned by the firmware. The only way to locate the FW scb is to
2756         // traverse through the list of all SCB, since driver does not
2757         // maintain these SCBs on any list
2758         found = 0;
2759         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2760                 scb = adapter->kscb_list + i;
2761
2762                 if (scb->scp == scp) {
2763
2764                         found = 1;
2765
2766                         if (!(scb->state & SCB_ISSUED)) {
2767                                 con_log(CL_ANN, (KERN_WARNING
2768                                 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2769                                 scp->serial_number, scb->sno, scb->dev_channel,
2770                                 scb->dev_target));
2771                                 BUG();
2772                         }
2773                         else {
2774                                 con_log(CL_ANN, (KERN_WARNING
2775                                 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2776                                 scp->serial_number, scb->sno, scb->dev_channel,
2777                                 scb->dev_target));
2778                         }
2779                 }
2780         }
2781
2782         if (!found) {
2783                 con_log(CL_ANN, (KERN_WARNING
2784                         "megaraid abort: scsi cmd:%ld, do now own\n",
2785                         scp->serial_number));
2786
2787                 // FIXME: Should there be a callback for this command?
2788                 return SUCCESS;
2789         }
2790
2791         // We cannot actually abort a command owned by firmware, return
2792         // failure and wait for reset. In host reset handler, we will find out
2793         // if the HBA is still live
2794         return FAILED;
2795 }
2796
2797
2798 /**
2799  * megaraid_reset_handler - device reset hadler for mailbox based driver
2800  * @scp         : reference command
2801  *
2802  * Reset handler for the mailbox based controller. First try to find out if
2803  * the FW is still live, in which case the outstanding commands counter mut go
2804  * down to 0. If that happens, also issue the reservation reset command to
2805  * relinquish (possible) reservations on the logical drives connected to this
2806  * host
2807  **/
2808 static int
2809 megaraid_reset_handler(struct scsi_cmnd *scp)
2810 {
2811         adapter_t       *adapter;
2812         scb_t           *scb;
2813         scb_t           *tmp;
2814         mraid_device_t  *raid_dev;
2815         unsigned long   flags;
2816         uint8_t         raw_mbox[sizeof(mbox_t)];
2817         int             rval;
2818         int             recovery_window;
2819         int             recovering;
2820         int             i;
2821
2822         adapter         = SCP2ADAPTER(scp);
2823         raid_dev        = ADAP2RAIDDEV(adapter);
2824
2825         assert_spin_locked(adapter->host_lock);
2826
2827         con_log(CL_ANN, (KERN_WARNING "megaraid: reseting the host...\n"));
2828
2829         // return failure if adapter is not responding
2830         if (raid_dev->hw_error) {
2831                 con_log(CL_ANN, (KERN_NOTICE
2832                         "megaraid: hw error, cannot reset\n"));
2833                 return FAILED;
2834         }
2835
2836
2837         // Under exceptional conditions, FW can take up to 3 minutes to
2838         // complete command processing. Wait for additional 2 minutes for the
2839         // pending commands counter to go down to 0. If it doesn't, let the
2840         // controller be marked offline
2841         // Also, reset all the commands currently owned by the driver
2842         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2843         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2844
2845                 list_del_init(&scb->list);      // from pending list
2846
2847                 con_log(CL_ANN, (KERN_WARNING
2848                         "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2849                                 scp->serial_number, scb->sno,
2850                                 scb->dev_channel, scb->dev_target));
2851
2852                 scp->result = (DID_RESET << 16);
2853                 scp->scsi_done(scp);
2854
2855                 megaraid_dealloc_scb(adapter, scb);
2856         }
2857         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2858
2859         if (adapter->outstanding_cmds) {
2860                 con_log(CL_ANN, (KERN_NOTICE
2861                         "megaraid: %d outstanding commands. Max wait %d sec\n",
2862                         adapter->outstanding_cmds, MBOX_RESET_WAIT));
2863         }
2864
2865         spin_unlock(adapter->host_lock);
2866
2867         recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2868
2869         recovering = adapter->outstanding_cmds;
2870
2871         for (i = 0; i < recovery_window && adapter->outstanding_cmds; i++) {
2872
2873                 megaraid_ack_sequence(adapter);
2874
2875                 // print a message once every 5 seconds only
2876                 if (!(i % 5)) {
2877                         con_log(CL_ANN, (
2878                         "megaraid mbox: Wait for %d commands to complete:%d\n",
2879                                 adapter->outstanding_cmds,
2880                                 MBOX_RESET_WAIT - i));
2881                 }
2882
2883                 // bailout if no recovery happended in reset time
2884                 if ((i == MBOX_RESET_WAIT) &&
2885                         (recovering == adapter->outstanding_cmds)) {
2886                         break;
2887                 }
2888
2889                 msleep(1000);
2890         }
2891
2892         spin_lock(adapter->host_lock);
2893
2894         // If still outstanding commands, bail out
2895         if (adapter->outstanding_cmds) {
2896                 con_log(CL_ANN, (KERN_WARNING
2897                         "megaraid mbox: critical hardware error!\n"));
2898
2899                 raid_dev->hw_error = 1;
2900
2901                 return FAILED;
2902         }
2903         else {
2904                 con_log(CL_ANN, (KERN_NOTICE
2905                 "megaraid mbox: reset sequence completed sucessfully\n"));
2906         }
2907
2908
2909         // If the controller supports clustering, reset reservations
2910         if (!adapter->ha) return SUCCESS;
2911
2912         // clear reservations if any
2913         raw_mbox[0] = CLUSTER_CMD;
2914         raw_mbox[2] = RESET_RESERVATIONS;
2915
2916         rval = SUCCESS;
2917         if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2918                 con_log(CL_ANN,
2919                         (KERN_INFO "megaraid: reservation reset\n"));
2920         }
2921         else {
2922                 rval = FAILED;
2923                 con_log(CL_ANN, (KERN_WARNING
2924                                 "megaraid: reservation reset failed\n"));
2925         }
2926
2927         return rval;
2928 }
2929
2930
2931 /*
2932  * START: internal commands library
2933  *
2934  * This section of the driver has the common routine used by the driver and
2935  * also has all the FW routines
2936  */
2937
2938 /**
2939  * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2940  * @adapter     - controller's soft state
2941  * @raw_mbox    - the mailbox
2942  *
2943  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2944  * controllers
2945  */
2946 static int
2947 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2948 {
2949         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2950         mbox64_t        *mbox64;
2951         mbox_t          *mbox;
2952         uint8_t         status;
2953         int             i;
2954
2955
2956         mbox64  = raid_dev->mbox64;
2957         mbox    = raid_dev->mbox;
2958
2959         /*
2960          * Wait until mailbox is free
2961          */
2962         if (megaraid_busywait_mbox(raid_dev) != 0)
2963                 goto blocked_mailbox;
2964
2965         /*
2966          * Copy mailbox data into host structure
2967          */
2968         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2969         mbox->cmdid             = 0xFE;
2970         mbox->busy              = 1;
2971         mbox->poll              = 0;
2972         mbox->ack               = 0;
2973         mbox->numstatus         = 0xFF;
2974         mbox->status            = 0xFF;
2975
2976         wmb();
2977         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2978
2979         // wait for maximum 1 second for status to post. If the status is not
2980         // available within 1 second, assume FW is initializing and wait
2981         // for an extended amount of time
2982         if (mbox->numstatus == 0xFF) {  // status not yet available
2983                 udelay(25);;
2984
2985                 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2986                         rmb();
2987                         msleep(1);
2988                 }
2989
2990
2991                 if (i == 1000) {
2992                         con_log(CL_ANN, (KERN_NOTICE
2993                                 "megaraid mailbox: wait for FW to boot      "));
2994
2995                         for (i = 0; (mbox->numstatus == 0xFF) &&
2996                                         (i < MBOX_RESET_WAIT); i++) {
2997                                 rmb();
2998                                 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2999                                                         MBOX_RESET_WAIT - i));
3000                                 msleep(1000);
3001                         }
3002
3003                         if (i == MBOX_RESET_WAIT) {
3004
3005                                 con_log(CL_ANN, (
3006                                 "\nmegaraid mailbox: status not available\n"));
3007
3008                                 return -1;
3009                         }
3010                         con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
3011                 }
3012         }
3013
3014         // wait for maximum 1 second for poll semaphore
3015         if (mbox->poll != 0x77) {
3016                 udelay(25);
3017
3018                 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
3019                         rmb();
3020                         msleep(1);
3021                 }
3022
3023                 if (i == 1000) {
3024                         con_log(CL_ANN, (KERN_WARNING
3025                         "megaraid mailbox: could not get poll semaphore\n"));
3026                         return -1;
3027                 }
3028         }
3029
3030         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
3031         wmb();
3032
3033         // wait for maximum 1 second for acknowledgement
3034         if (RDINDOOR(raid_dev) & 0x2) {
3035                 udelay(25);
3036
3037                 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
3038                         rmb();
3039                         msleep(1);
3040                 }
3041
3042                 if (i == 1000) {
3043                         con_log(CL_ANN, (KERN_WARNING
3044                                 "megaraid mailbox: could not acknowledge\n"));
3045                         return -1;
3046                 }
3047         }
3048         mbox->poll      = 0;
3049         mbox->ack       = 0x77;
3050
3051         status = mbox->status;
3052
3053         // invalidate the completed command id array. After command
3054         // completion, firmware would write the valid id.
3055         mbox->numstatus = 0xFF;
3056         mbox->status    = 0xFF;
3057         for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
3058                 mbox->completed[i] = 0xFF;
3059         }
3060
3061         return status;
3062
3063 blocked_mailbox:
3064
3065         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
3066         return -1;
3067 }
3068
3069
3070 /**
3071  * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
3072  * @adapter     - controller's soft state
3073  * @raw_mbox    - the mailbox
3074  *
3075  * Issue a scb in synchronous and non-interrupt mode for mailbox based
3076  * controllers. This is a faster version of the synchronous command and
3077  * therefore can be called in interrupt-context as well
3078  */
3079 static int
3080 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
3081 {
3082         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3083         mbox_t          *mbox;
3084         long            i;
3085
3086
3087         mbox    = raid_dev->mbox;
3088
3089         // return immediately if the mailbox is busy
3090         if (mbox->busy) return -1;
3091
3092         // Copy mailbox data into host structure
3093         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
3094         mbox->cmdid             = 0xFE;
3095         mbox->busy              = 1;
3096         mbox->poll              = 0;
3097         mbox->ack               = 0;
3098         mbox->numstatus         = 0xFF;
3099         mbox->status            = 0xFF;
3100
3101         wmb();
3102         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3103
3104         for (i = 0; i < 0xFFFFF; i++) {
3105                 if (mbox->numstatus != 0xFF) break;
3106         }
3107
3108         if (i == 0xFFFFF) {
3109                 // We may need to re-calibrate the counter
3110                 con_log(CL_ANN, (KERN_CRIT
3111                         "megaraid: fast sync command timed out\n"));
3112         }
3113
3114         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
3115         wmb();
3116
3117         return mbox->status;
3118 }
3119
3120
3121 /**
3122  * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
3123  * @raid_dev    - RAID device (HBA) soft state
3124  *
3125  * wait until the controller's mailbox is available to accept more commands.
3126  * wait for at most 1 second
3127  */
3128 static int
3129 megaraid_busywait_mbox(mraid_device_t *raid_dev)
3130 {
3131         mbox_t  *mbox = raid_dev->mbox;
3132         int     i = 0;
3133
3134         if (mbox->busy) {
3135                 udelay(25);
3136                 for (i = 0; mbox->busy && i < 1000; i++)
3137                         msleep(1);
3138         }
3139
3140         if (i < 1000) return 0;
3141         else return -1;
3142 }
3143
3144
3145 /**
3146  * megaraid_mbox_product_info - some static information about the controller
3147  * @adapter     - our soft state
3148  *
3149  * issue commands to the controller to grab some parameters required by our
3150  * caller.
3151  */
3152 static int
3153 megaraid_mbox_product_info(adapter_t *adapter)
3154 {
3155         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
3156         mbox_t                  *mbox;
3157         uint8_t                 raw_mbox[sizeof(mbox_t)];
3158         mraid_pinfo_t           *pinfo;
3159         dma_addr_t              pinfo_dma_h;
3160         mraid_inquiry3_t        *mraid_inq3;
3161         int                     i;
3162
3163
3164         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3165         mbox = (mbox_t *)raw_mbox;
3166
3167         /*
3168          * Issue an ENQUIRY3 command to find out certain adapter parameters,
3169          * e.g., max channels, max commands etc.
3170          */
3171         pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3172                         &pinfo_dma_h);
3173
3174         if (pinfo == NULL) {
3175                 con_log(CL_ANN, (KERN_WARNING
3176                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
3177                         __LINE__));
3178
3179                 return -1;
3180         }
3181         memset(pinfo, 0, sizeof(mraid_pinfo_t));
3182
3183         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3184         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3185
3186         raw_mbox[0] = FC_NEW_CONFIG;
3187         raw_mbox[2] = NC_SUBOP_ENQUIRY3;
3188         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
3189
3190         // Issue the command
3191         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3192
3193                 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3194
3195                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3196                         pinfo, pinfo_dma_h);
3197
3198                 return -1;
3199         }
3200
3201         /*
3202          * Collect information about state of each physical drive
3203          * attached to the controller. We will expose all the disks
3204          * which are not part of RAID
3205          */
3206         mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3207         for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3208                 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3209         }
3210
3211         /*
3212          * Get product info for information like number of channels,
3213          * maximum commands supported.
3214          */
3215         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3216         mbox->xferaddr = (uint32_t)pinfo_dma_h;
3217
3218         raw_mbox[0] = FC_NEW_CONFIG;
3219         raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3220
3221         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3222
3223                 con_log(CL_ANN, (KERN_WARNING
3224                         "megaraid: product info failed\n"));
3225
3226                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3227                         pinfo, pinfo_dma_h);
3228
3229                 return -1;
3230         }
3231
3232         /*
3233          * Setup some parameters for host, as required by our caller
3234          */
3235         adapter->max_channel = pinfo->nchannels;
3236
3237         /*
3238          * we will export all the logical drives on a single channel.
3239          * Add 1 since inquires do not come for inititor ID
3240          */
3241         adapter->max_target     = MAX_LOGICAL_DRIVES_40LD + 1;
3242         adapter->max_lun        = 8;    // up to 8 LUNs for non-disk devices
3243
3244         /*
3245          * These are the maximum outstanding commands for the scsi-layer
3246          */
3247         adapter->max_cmds       = MBOX_MAX_SCSI_CMDS;
3248
3249         memset(adapter->fw_version, 0, VERSION_SIZE);
3250         memset(adapter->bios_version, 0, VERSION_SIZE);
3251
3252         memcpy(adapter->fw_version, pinfo->fw_version, 4);
3253         adapter->fw_version[4] = 0;
3254
3255         memcpy(adapter->bios_version, pinfo->bios_version, 4);
3256         adapter->bios_version[4] = 0;
3257
3258         con_log(CL_ANN, (KERN_NOTICE
3259                 "megaraid: fw version:[%s] bios version:[%s]\n",
3260                 adapter->fw_version, adapter->bios_version));
3261
3262         pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3263                         pinfo_dma_h);
3264
3265         return 0;
3266 }
3267
3268
3269
3270 /**
3271  * megaraid_mbox_extended_cdb - check for support for extended CDBs
3272  * @adapter     - soft state for the controller
3273  *
3274  * this routine check whether the controller in question supports extended
3275  * ( > 10 bytes ) CDBs
3276  */
3277 static int
3278 megaraid_mbox_extended_cdb(adapter_t *adapter)
3279 {
3280         mbox_t          *mbox;
3281         uint8_t         raw_mbox[sizeof(mbox_t)];
3282         int             rval;
3283
3284         mbox = (mbox_t *)raw_mbox;
3285
3286         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3287         mbox->xferaddr  = (uint32_t)adapter->ibuf_dma_h;
3288
3289         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3290
3291         raw_mbox[0] = MAIN_MISC_OPCODE;
3292         raw_mbox[2] = SUPPORT_EXT_CDB;
3293
3294         /*
3295          * Issue the command
3296          */
3297         rval = 0;
3298         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3299                 rval = -1;
3300         }
3301
3302         return rval;
3303 }
3304
3305
3306 /**
3307  * megaraid_mbox_support_ha - Do we support clustering
3308  * @adapter     - soft state for the controller
3309  * @init_id     - ID of the initiator
3310  *
3311  * Determine if the firmware supports clustering and the ID of the initiator.
3312  */
3313 static int
3314 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3315 {
3316         mbox_t          *mbox;
3317         uint8_t         raw_mbox[sizeof(mbox_t)];
3318         int             rval;
3319
3320
3321         mbox = (mbox_t *)raw_mbox;
3322
3323         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3324
3325         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3326
3327         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3328
3329         raw_mbox[0] = GET_TARGET_ID;
3330
3331         // Issue the command
3332         *init_id = 7;
3333         rval =  -1;
3334         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3335
3336                 *init_id = *(uint8_t *)adapter->ibuf;
3337
3338                 con_log(CL_ANN, (KERN_INFO
3339                         "megaraid: cluster firmware, initiator ID: %d\n",
3340                         *init_id));
3341
3342                 rval =  0;
3343         }
3344
3345         return rval;
3346 }
3347
3348
3349 /**
3350  * megaraid_mbox_support_random_del - Do we support random deletion
3351  * @adapter     - soft state for the controller
3352  *
3353  * Determine if the firmware supports random deletion
3354  * Return:      1 is operation supported, 0 otherwise
3355  */
3356 static int
3357 megaraid_mbox_support_random_del(adapter_t *adapter)
3358 {
3359         mbox_t          *mbox;
3360         uint8_t         raw_mbox[sizeof(mbox_t)];
3361         int             rval;
3362
3363
3364         mbox = (mbox_t *)raw_mbox;
3365
3366         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3367
3368         raw_mbox[0] = FC_DEL_LOGDRV;
3369         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3370
3371         // Issue the command
3372         rval = 0;
3373         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3374
3375                 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3376
3377                 rval =  1;
3378         }
3379
3380         return rval;
3381 }
3382
3383
3384 /**
3385  * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3386  * @adapter     - soft state for the controller
3387  *
3388  * Find out the maximum number of scatter-gather elements supported by the
3389  * firmware
3390  */
3391 static int
3392 megaraid_mbox_get_max_sg(adapter_t *adapter)
3393 {
3394         mbox_t          *mbox;
3395         uint8_t         raw_mbox[sizeof(mbox_t)];
3396         int             nsg;
3397
3398
3399         mbox = (mbox_t *)raw_mbox;
3400
3401         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3402
3403         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3404
3405         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3406
3407         raw_mbox[0] = MAIN_MISC_OPCODE;
3408         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3409
3410         // Issue the command
3411         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3412                 nsg =  *(uint8_t *)adapter->ibuf;
3413         }
3414         else {
3415                 nsg =  MBOX_DEFAULT_SG_SIZE;
3416         }
3417
3418         if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3419
3420         return nsg;
3421 }
3422
3423
3424 /**
3425  * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3426  * @adapter     - soft state for the controller
3427  *
3428  * Enumerate the RAID and SCSI channels for ROMB platoforms so that channels
3429  * can be exported as regular SCSI channels
3430  */
3431 static void
3432 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3433 {
3434         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3435         mbox_t          *mbox;
3436         uint8_t         raw_mbox[sizeof(mbox_t)];
3437
3438
3439         mbox = (mbox_t *)raw_mbox;
3440
3441         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3442
3443         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3444
3445         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3446
3447         raw_mbox[0] = CHNL_CLASS;
3448         raw_mbox[2] = GET_CHNL_CLASS;
3449
3450         // Issue the command. If the command fails, all channels are RAID
3451         // channels
3452         raid_dev->channel_class = 0xFF;
3453         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3454                 raid_dev->channel_class =  *(uint8_t *)adapter->ibuf;
3455         }
3456
3457         return;
3458 }
3459
3460
3461 /**
3462  * megaraid_mbox_flush_cache - flush adapter and disks cache
3463  * @param adapter       : soft state for the controller
3464  *
3465  * Flush adapter cache followed by disks cache
3466  */
3467 static void
3468 megaraid_mbox_flush_cache(adapter_t *adapter)
3469 {
3470         mbox_t  *mbox;
3471         uint8_t raw_mbox[sizeof(mbox_t)];
3472
3473
3474         mbox = (mbox_t *)raw_mbox;
3475
3476         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3477
3478         raw_mbox[0] = FLUSH_ADAPTER;
3479
3480         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3481                 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3482         }
3483
3484         raw_mbox[0] = FLUSH_SYSTEM;
3485
3486         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3487                 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3488         }
3489
3490         return;
3491 }
3492
3493
3494 /**
3495  * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3496  * @param adapter       : controllers' soft state
3497  * @param scb           : SCB to be displayed
3498  * @param level : debug level for console print
3499  *
3500  * Diplay information about the given SCB iff the current debug level is
3501  * verbose
3502  */
3503 static void
3504 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3505 {
3506         mbox_ccb_t              *ccb;
3507         struct scsi_cmnd        *scp;
3508         mbox_t                  *mbox;
3509         int                     level;
3510         int                     i;
3511
3512
3513         ccb     = (mbox_ccb_t *)scb->ccb;
3514         scp     = scb->scp;
3515         mbox    = ccb->mbox;
3516
3517         level = CL_DLEVEL3;
3518
3519         con_log(level, (KERN_NOTICE
3520                 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3521                 mbox->cmd, scb->sno));
3522
3523         con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3524                 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3525                 mbox->numsge));
3526
3527         if (!scp) return;
3528
3529         con_log(level, (KERN_NOTICE "scsi cmnd: "));
3530
3531         for (i = 0; i < scp->cmd_len; i++) {
3532                 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3533         }
3534
3535         con_log(level, ("\n"));
3536
3537         return;
3538 }
3539
3540
3541 /**
3542  * megaraid_mbox_setup_device_map - manage device ids
3543  * @adapter     : Driver's soft state
3544  *
3545  * Manange the device ids to have an appropraite mapping between the kernel
3546  * scsi addresses and megaraid scsi and logical drive addresses. We export
3547  * scsi devices on their actual addresses, whereas the logical drives are
3548  * exported on a virtual scsi channel.
3549  **/
3550 static void
3551 megaraid_mbox_setup_device_map(adapter_t *adapter)
3552 {
3553         uint8_t         c;
3554         uint8_t         t;
3555
3556         /*
3557          * First fill the values on the logical drive channel
3558          */
3559         for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3560                 adapter->device_ids[adapter->max_channel][t] =
3561                         (t < adapter->init_id) ?  t : t - 1;
3562
3563         adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3564
3565         /*
3566          * Fill the values on the physical devices channels
3567          */
3568         for (c = 0; c < adapter->max_channel; c++)
3569                 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3570                         adapter->device_ids[c][t] = (c << 8) | t;
3571 }
3572
3573
3574 /*
3575  * END: internal commands library
3576  */
3577
3578 /*
3579  * START: Interface for the common management module
3580  *
3581  * This is the module, which interfaces with the common mangement module to
3582  * provide support for ioctl and sysfs
3583  */
3584
3585 /**
3586  * megaraid_cmm_register - register with the mangement module
3587  * @param adapter       : HBA soft state
3588  *
3589  * Register with the management module, which allows applications to issue
3590  * ioctl calls to the drivers. This interface is used by the management module
3591  * to setup sysfs support as well.
3592  */
3593 static int
3594 megaraid_cmm_register(adapter_t *adapter)
3595 {
3596         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3597         mraid_mmadp_t   adp;
3598         scb_t           *scb;
3599         mbox_ccb_t      *ccb;
3600         int             rval;
3601         int             i;
3602
3603         // Allocate memory for the base list of scb for management module.
3604         adapter->uscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_USER_CMDS,
3605                         GFP_KERNEL);
3606
3607         if (adapter->uscb_list == NULL) {
3608                 con_log(CL_ANN, (KERN_WARNING
3609                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
3610                         __LINE__));
3611                 return -1;
3612         }
3613         memset(adapter->uscb_list, 0, sizeof(scb_t) * MBOX_MAX_USER_CMDS);
3614
3615
3616         // Initialize the synchronization parameters for resources for
3617         // commands for management module
3618         INIT_LIST_HEAD(&adapter->uscb_pool);
3619
3620         spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3621
3622
3623
3624         // link all the packets. Note, CCB for commands, coming from the
3625         // commom management module, mailbox physical address are already
3626         // setup by it. We just need placeholder for that in our local command
3627         // control blocks
3628         for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3629
3630                 scb                     = adapter->uscb_list + i;
3631                 ccb                     = raid_dev->uccb_list + i;
3632
3633                 scb->ccb                = (caddr_t)ccb;
3634                 ccb->mbox64             = raid_dev->umbox64 + i;
3635                 ccb->mbox               = &ccb->mbox64->mbox32;
3636                 ccb->raw_mbox           = (uint8_t *)ccb->mbox;
3637
3638                 scb->gp                 = 0;
3639
3640                 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3641                 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3642                 scb->sno                = i + MBOX_MAX_SCSI_CMDS;
3643
3644                 scb->scp                = NULL;
3645                 scb->state              = SCB_FREE;
3646                 scb->dma_direction      = PCI_DMA_NONE;
3647                 scb->dma_type           = MRAID_DMA_NONE;
3648                 scb->dev_channel        = -1;
3649                 scb->dev_target         = -1;
3650
3651                 // put scb in the free pool
3652                 list_add_tail(&scb->list, &adapter->uscb_pool);
3653         }
3654
3655         adp.unique_id           = adapter->unique_id;
3656         adp.drvr_type           = DRVRTYPE_MBOX;
3657         adp.drvr_data           = (unsigned long)adapter;
3658         adp.pdev                = adapter->pdev;
3659         adp.issue_uioc          = megaraid_mbox_mm_handler;
3660         adp.timeout             = 300;
3661         adp.max_kioc            = MBOX_MAX_USER_CMDS;
3662
3663         if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3664
3665                 con_log(CL_ANN, (KERN_WARNING
3666                         "megaraid mbox: did not register with CMM\n"));
3667
3668                 kfree(adapter->uscb_list);
3669         }
3670
3671         return rval;
3672 }
3673
3674
3675 /**
3676  * megaraid_cmm_unregister - un-register with the mangement module
3677  * @param adapter       : HBA soft state
3678  *
3679  * Un-register with the management module.
3680  * FIXME: mgmt module must return failure for unregister if it has pending
3681  * commands in LLD
3682  */
3683 static int
3684 megaraid_cmm_unregister(adapter_t *adapter)
3685 {
3686         kfree(adapter->uscb_list);
3687         mraid_mm_unregister_adp(adapter->unique_id);
3688         return 0;
3689 }
3690
3691
3692 /**
3693  * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3694  * @param drvr_data     : LLD specific data
3695  * @param kioc          : CMM interface packet
3696  * @param action        : command action
3697  *
3698  * This routine is invoked whenever the Common Mangement Module (CMM) has a
3699  * command for us. The 'action' parameter specifies if this is a new command
3700  * or otherwise.
3701  */
3702 static int
3703 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3704 {
3705         adapter_t *adapter;
3706
3707         if (action != IOCTL_ISSUE) {
3708                 con_log(CL_ANN, (KERN_WARNING
3709                         "megaraid: unsupported management action:%#2x\n",
3710                         action));
3711                 return (-ENOTSUPP);
3712         }
3713
3714         adapter = (adapter_t *)drvr_data;
3715
3716         // make sure this adapter is not being detached right now.
3717         if (atomic_read(&adapter->being_detached)) {
3718                 con_log(CL_ANN, (KERN_WARNING
3719                         "megaraid: reject management request, detaching\n"));
3720                 return (-ENODEV);
3721         }
3722
3723         switch (kioc->opcode) {
3724
3725         case GET_ADAP_INFO:
3726
3727                 kioc->status =  gather_hbainfo(adapter, (mraid_hba_info_t *)
3728                                         (unsigned long)kioc->buf_vaddr);
3729
3730                 kioc->done(kioc);
3731
3732                 return kioc->status;
3733
3734         case MBOX_CMD:
3735
3736                 return megaraid_mbox_mm_command(adapter, kioc);
3737
3738         default:
3739                 kioc->status = (-EINVAL);
3740                 kioc->done(kioc);
3741                 return (-EINVAL);
3742         }
3743
3744         return 0;       // not reached
3745 }
3746
3747 /**
3748  * megaraid_mbox_mm_command - issues commands routed through CMM
3749  * @param adapter       : HBA soft state
3750  * @param kioc          : management command packet
3751  *
3752  * Issues commands, which are routed through the management module.
3753  */
3754 static int
3755 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3756 {
3757         struct list_head        *head = &adapter->uscb_pool;
3758         mbox64_t                *mbox64;
3759         uint8_t                 *raw_mbox;
3760         scb_t                   *scb;
3761         mbox_ccb_t              *ccb;
3762         unsigned long           flags;
3763
3764         // detach one scb from free pool
3765         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3766
3767         if (list_empty(head)) { // should never happen because of CMM
3768
3769                 con_log(CL_ANN, (KERN_WARNING
3770                         "megaraid mbox: bug in cmm handler, lost resources\n"));
3771
3772                 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3773
3774                 return (-EINVAL);
3775         }
3776
3777         scb = list_entry(head->next, scb_t, list);
3778         list_del_init(&scb->list);
3779
3780         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3781
3782         scb->state              = SCB_ACTIVE;
3783         scb->dma_type           = MRAID_DMA_NONE;
3784         scb->dma_direction      = PCI_DMA_NONE;
3785
3786         ccb             = (mbox_ccb_t *)scb->ccb;
3787         mbox64          = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3788         raw_mbox        = (uint8_t *)&mbox64->mbox32;
3789
3790         memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3791
3792         scb->gp         = (unsigned long)kioc;
3793
3794         /*
3795          * If it is a logdrv random delete operation, we have to wait till
3796          * there are no outstanding cmds at the fw and then issue it directly
3797          */
3798         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3799
3800                 if (wait_till_fw_empty(adapter)) {
3801                         con_log(CL_ANN, (KERN_NOTICE
3802                                 "megaraid mbox: LD delete, timed out\n"));
3803
3804                         kioc->status = -ETIME;
3805
3806                         scb->status = -1;
3807
3808                         megaraid_mbox_mm_done(adapter, scb);
3809
3810                         return (-ETIME);
3811                 }
3812
3813                 INIT_LIST_HEAD(&scb->list);
3814
3815                 scb->state = SCB_ISSUED;
3816                 if (mbox_post_cmd(adapter, scb) != 0) {
3817
3818                         con_log(CL_ANN, (KERN_NOTICE
3819                                 "megaraid mbox: LD delete, mailbox busy\n"));
3820
3821                         kioc->status = -EBUSY;
3822
3823                         scb->status = -1;
3824
3825                         megaraid_mbox_mm_done(adapter, scb);
3826
3827                         return (-EBUSY);
3828                 }
3829
3830                 return 0;
3831         }
3832
3833         // put the command on the pending list and execute
3834         megaraid_mbox_runpendq(adapter, scb);
3835
3836         return 0;
3837 }
3838
3839
3840 static int
3841 wait_till_fw_empty(adapter_t *adapter)
3842 {
3843         unsigned long   flags = 0;
3844         int             i;
3845
3846
3847         /*
3848          * Set the quiescent flag to stop issuing cmds to FW.
3849          */
3850         spin_lock_irqsave(adapter->host_lock, flags);
3851         adapter->quiescent++;
3852         spin_unlock_irqrestore(adapter->host_lock, flags);
3853
3854         /*
3855          * Wait till there are no more cmds outstanding at FW. Try for at most
3856          * 60 seconds
3857          */
3858         for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3859                 con_log(CL_DLEVEL1, (KERN_INFO
3860                         "megaraid: FW has %d pending commands\n",
3861                         adapter->outstanding_cmds));
3862
3863                 msleep(1000);
3864         }
3865
3866         return adapter->outstanding_cmds;
3867 }
3868
3869
3870 /**
3871  * megaraid_mbox_mm_done - callback for CMM commands
3872  * @adapter     : HBA soft state
3873  * @scb         : completed command
3874  *
3875  * Callback routine for internal commands originated from the management
3876  * module.
3877  */
3878 static void
3879 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3880 {
3881         uioc_t                  *kioc;
3882         mbox64_t                *mbox64;
3883         uint8_t                 *raw_mbox;
3884         unsigned long           flags;
3885
3886         kioc                    = (uioc_t *)scb->gp;
3887         kioc->status            = 0;
3888         mbox64                  = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3889         mbox64->mbox32.status   = scb->status;
3890         raw_mbox                = (uint8_t *)&mbox64->mbox32;
3891
3892
3893         // put scb in the free pool
3894         scb->state      = SCB_FREE;
3895         scb->scp        = NULL;
3896
3897         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3898
3899         list_add(&scb->list, &adapter->uscb_pool);
3900
3901         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3902
3903         // if a delete logical drive operation succeeded, restart the
3904         // controller
3905         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3906
3907                 adapter->quiescent--;
3908
3909                 megaraid_mbox_runpendq(adapter, NULL);
3910         }
3911
3912         kioc->done(kioc);
3913
3914         return;
3915 }
3916
3917
3918 /**
3919  * gather_hbainfo - HBA characteristics for the applications
3920  * @param adapter       : HBA soft state
3921  * @param hinfo         : pointer to the caller's host info strucuture
3922  */
3923 static int
3924 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3925 {
3926         uint8_t dmajor;
3927
3928         dmajor                  = megaraid_mbox_version[0];
3929
3930         hinfo->pci_vendor_id    = adapter->pdev->vendor;
3931         hinfo->pci_device_id    = adapter->pdev->device;
3932         hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3933         hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3934
3935         hinfo->pci_bus          = adapter->pdev->bus->number;
3936         hinfo->pci_dev_fn       = adapter->pdev->devfn;
3937         hinfo->pci_slot         = PCI_SLOT(adapter->pdev->devfn);
3938         hinfo->irq              = adapter->host->irq;
3939         hinfo->baseport         = ADAP2RAIDDEV(adapter)->baseport;
3940
3941         hinfo->unique_id        = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3942         hinfo->host_no          = adapter->host->host_no;
3943
3944         return 0;
3945 }
3946
3947 /*
3948  * END: Interface for the common management module
3949  */
3950
3951
3952
3953 /**
3954  * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3955  *
3956  * Allocate packets required to issue FW calls whenever the sysfs attributes
3957  * are read. These attributes would require up-to-date information from the
3958  * FW. Also set up resources for mutual exclusion to share these resources and
3959  * the wait queue.
3960  *
3961  * @param adapter : controller's soft state
3962  *
3963  * @return 0 on success
3964  * @return -ERROR_CODE on failure
3965  */
3966 static int
3967 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3968 {
3969         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3970         int             rval = 0;
3971
3972         raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3973
3974         raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3975
3976         raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3977                         PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3978
3979         if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3980                 !raid_dev->sysfs_buffer) {
3981
3982                 con_log(CL_ANN, (KERN_WARNING
3983                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
3984                         __LINE__));
3985
3986                 rval = -ENOMEM;
3987
3988                 megaraid_sysfs_free_resources(adapter);
3989         }
3990
3991         sema_init(&raid_dev->sysfs_sem, 1);
3992
3993         init_waitqueue_head(&raid_dev->sysfs_wait_q);
3994
3995         return rval;
3996 }
3997
3998
3999 /**
4000  * megaraid_sysfs_free_resources - free sysfs related resources
4001  *
4002  * Free packets allocated for sysfs FW commands
4003  *
4004  * @param adapter : controller's soft state
4005  */
4006 static void
4007 megaraid_sysfs_free_resources(adapter_t *adapter)
4008 {
4009         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
4010
4011         if (raid_dev->sysfs_uioc) kfree(raid_dev->sysfs_uioc);
4012
4013         if (raid_dev->sysfs_mbox64) kfree(raid_dev->sysfs_mbox64);
4014
4015         if (raid_dev->sysfs_buffer) {
4016                 pci_free_consistent(adapter->pdev, PAGE_SIZE,
4017                         raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
4018         }
4019 }
4020
4021
4022 /**
4023  * megaraid_sysfs_get_ldmap_done - callback for get ldmap
4024  *
4025  * Callback routine called in the ISR/tasklet context for get ldmap call
4026  *
4027  * @param uioc : completed packet
4028  */
4029 static void
4030 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
4031 {
4032         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
4033         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
4034
4035         uioc->status = 0;
4036
4037         wake_up(&raid_dev->sysfs_wait_q);
4038 }
4039
4040
4041 /**
4042  * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
4043  *
4044  * Timeout routine to recover and return to application, in case the adapter
4045  * has stopped responding. A timeout of 60 seconds for this command seem like
4046  * a good value
4047  *
4048  * @param uioc : timed out packet
4049  */
4050 static void
4051 megaraid_sysfs_get_ldmap_timeout(unsigned long data)
4052 {
4053         uioc_t          *uioc = (uioc_t *)data;
4054         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
4055         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
4056
4057         uioc->status = -ETIME;
4058
4059         wake_up(&raid_dev->sysfs_wait_q);
4060 }
4061
4062
4063 /**
4064  * megaraid_sysfs_get_ldmap - get update logical drive map
4065  *
4066  * This routine will be called whenever user reads the logical drive
4067  * attributes, go get the current logical drive mapping table from the
4068  * firmware. We use the managment API's to issue commands to the controller.
4069  *
4070  * NOTE: The commands issuance functionality is not generalized and
4071  * implemented in context of "get ld map" command only. If required, the
4072  * command issuance logical can be trivially pulled out and implemented as a
4073  * standalone libary. For now, this should suffice since there is no other
4074  * user of this interface.
4075  *
4076  * @param adapter : controller's soft state
4077  *
4078  * @return 0 on success
4079  * @return -1 on failure
4080  */
4081 static int
4082 megaraid_sysfs_get_ldmap(adapter_t *adapter)
4083 {
4084         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
4085         uioc_t                  *uioc;
4086         mbox64_t                *mbox64;
4087         mbox_t                  *mbox;
4088         char                    *raw_mbox;
4089         struct timer_list       sysfs_timer;
4090         struct timer_list       *timerp;
4091         caddr_t                 ldmap;
4092         int                     rval = 0;
4093
4094         /*
4095          * Allow only one read at a time to go through the sysfs attributes
4096          */
4097         down(&raid_dev->sysfs_sem);
4098
4099         uioc    = raid_dev->sysfs_uioc;
4100         mbox64  = raid_dev->sysfs_mbox64;
4101         ldmap   = raid_dev->sysfs_buffer;
4102
4103         memset(uioc, 0, sizeof(uioc_t));
4104         memset(mbox64, 0, sizeof(mbox64_t));
4105         memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
4106
4107         mbox            = &mbox64->mbox32;
4108         raw_mbox        = (char *)mbox;
4109         uioc->cmdbuf    = (uint64_t)(unsigned long)mbox64;
4110         uioc->buf_vaddr = (caddr_t)adapter;
4111         uioc->status    = -ENODATA;
4112         uioc->done      = megaraid_sysfs_get_ldmap_done;
4113
4114         /*
4115          * Prepare the mailbox packet to get the current logical drive mapping
4116          * table
4117          */
4118         mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
4119
4120         raw_mbox[0] = FC_DEL_LOGDRV;
4121         raw_mbox[2] = OP_GET_LDID_MAP;
4122
4123         /*
4124          * Setup a timer to recover from a non-responding controller
4125          */
4126         timerp  = &sysfs_timer;
4127         init_timer(timerp);
4128
4129         timerp->function        = megaraid_sysfs_get_ldmap_timeout;
4130         timerp->data            = (unsigned long)uioc;
4131         timerp->expires         = jiffies + 60 * HZ;
4132
4133         add_timer(timerp);
4134
4135         /*
4136          * Send the command to the firmware
4137          */
4138         rval = megaraid_mbox_mm_command(adapter, uioc);
4139
4140         if (rval == 0) {        // command successfully issued
4141                 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4142
4143                 /*
4144                  * Check if the command timed out
4145                  */
4146                 if (uioc->status == -ETIME) {
4147                         con_log(CL_ANN, (KERN_NOTICE
4148                                 "megaraid: sysfs get ld map timed out\n"));
4149
4150                         rval = -ETIME;
4151                 }
4152                 else {
4153                         rval = mbox->status;
4154                 }
4155
4156                 if (rval == 0) {
4157                         memcpy(raid_dev->curr_ldmap, ldmap,
4158                                 sizeof(raid_dev->curr_ldmap));
4159                 }
4160                 else {
4161                         con_log(CL_ANN, (KERN_NOTICE
4162                                 "megaraid: get ld map failed with %x\n", rval));
4163                 }
4164         }
4165         else {
4166                 con_log(CL_ANN, (KERN_NOTICE
4167                         "megaraid: could not issue ldmap command:%x\n", rval));
4168         }
4169
4170
4171         del_timer_sync(timerp);
4172
4173         up(&raid_dev->sysfs_sem);
4174
4175         return rval;
4176 }
4177
4178
4179 /**
4180  * megaraid_sysfs_show_app_hndl - display application handle for this adapter
4181  *
4182  * Display the handle used by the applications while executing management
4183  * tasks on the adapter. We invoke a management module API to get the adapter
4184  * handle, since we do not interface with applications directly.
4185  *
4186  * @param cdev  : class device object representation for the host
4187  * @param buf   : buffer to send data to
4188  */
4189 static ssize_t
4190 megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf)
4191 {
4192         struct Scsi_Host *shost = class_to_shost(cdev);
4193         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4194         uint32_t        app_hndl;
4195
4196         app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4197
4198         return snprintf(buf, 8, "%u\n", app_hndl);
4199 }
4200
4201
4202 /**
4203  * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4204  *
4205  * Display the logical drive number for the device in question, if it a valid
4206  * logical drive. For physical devices, "-1" is returned
4207  * The logical drive number is displayed in following format
4208  *
4209  * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4210  *   <int>     <int>       <int>            <int>
4211  *
4212  * @param dev   : device object representation for the scsi device
4213  * @param buf   : buffer to send data to
4214  */
4215 static ssize_t
4216 megaraid_sysfs_show_ldnum(struct device *dev, char *buf)
4217 {
4218         struct scsi_device *sdev = to_scsi_device(dev);
4219         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4220         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
4221         int             scsi_id = -1;
4222         int             logical_drv = -1;
4223         int             ldid_map = -1;
4224         uint32_t        app_hndl = 0;
4225         int             mapped_sdev_id;
4226         int             rval;
4227         int             i;
4228
4229         if (raid_dev->random_del_supported &&
4230                         MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4231
4232                 rval = megaraid_sysfs_get_ldmap(adapter);
4233                 if (rval == 0) {
4234
4235                         for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4236
4237                                 mapped_sdev_id = sdev->id;
4238
4239                                 if (sdev->id > adapter->init_id) {
4240                                         mapped_sdev_id -= 1;
4241                                 }
4242
4243                                 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4244
4245                                         scsi_id = sdev->id;
4246
4247                                         logical_drv = i;
4248
4249                                         ldid_map = raid_dev->curr_ldmap[i];
4250
4251                                         app_hndl = mraid_mm_adapter_app_handle(
4252                                                         adapter->unique_id);
4253
4254                                         break;
4255                                 }
4256                         }
4257                 }
4258                 else {
4259                         con_log(CL_ANN, (KERN_NOTICE
4260                                 "megaraid: sysfs get ld map failed: %x\n",
4261                                 rval));
4262                 }
4263         }
4264
4265         return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4266                         ldid_map, app_hndl);
4267 }
4268
4269
4270 /*
4271  * END: Mailbox Low Level Driver
4272  */
4273 module_init(megaraid_init);
4274 module_exit(megaraid_exit);
4275
4276 /* vim: set ts=8 sw=8 tw=78 ai si: */