aboutsummaryrefslogblamecommitdiffstats
path: root/drivers/scsi/megaraid.c
blob: 76ad72d32c3f5ef8123b0b32b921de5ad7634f86 (plain) (tree)
1
2
3
4
5
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189



                                                    
                                             













                                                                        

                                                                      
















                                                                              
                             







                            
                              
                        
                       






                           
                                        
 

                                                        


                                        
                                   












                                                                                                                                 



                                                                           











                                                   


                                                                                


                                                                             
                                                    
                                      
                                                 
                                       
                                      






















































                                                                               
                                              

                                                                     
                                                     

                                                                     
                                                      

                                                                     
                                                      

                                                                     
                                      
















































































































                                                                               
                                                                               



















                                                                              



                                                                              
                                                                  

                                                             
                           
                                                                    
                           


                                                                     
                           
                                                                      
                           














































                                                                               
                                                              



                                 
                            














                                                                       
                                                 
                                                   

                         
 

                                                          
 






                                                                 
 


                                                      


                    

                                    













































































































                                                                               
                    









                                                          

                                                   


































































































                                                                               




























                                                                              

                                  
                                               
 
                                              
                                                                    
 
                                                     
                                                        
 


                                                     
                 


















































































































































































                                                                                   
                                                                            














































































































































































































































































































































































































                                                                              





                                                                            
                                          




































































                                                                            





                                                                            
                                           














































                                                                            

                                                 
























                                                                   
                                                                    























































                                                                              

                                                                         
















                                                                          

                                                                       



























































                                                                              
                                               

                                                                        



                                                                  






















































































































                                                                               
                                                                       




















                                                                              
                         
                                         
                      

























                                                       

                               










                                                                             
                               





                             




                                                                       
                                  


                                    
                                                    
 

                 







                                                                  






                                                                        





                                             






























































































































                                                                                
                                     










                                                           
                                                              





                                                                         

      

                                      






                                                                   

                                        
                    
 
 














                                                                           

                                                                     














                                                               

                                                                           





                                                                             
                                                                        
                                                                              
                                                  









                                                                          
                                                                             
                                                                              
                                                  























                                                                          
                                




                                                            
                                                              





















































































































































































































































































































































































































































































































































































































































































































































                                                                                
                                                                       






























































































































































































                                                                              
                                                                 
















                                                                          
                                                                 


                                                 
                                                               












































































































































                                                                              



                                                                                   




































































































































































                                                                                
                    

























                                                                              
                                                                      

































































































































































































                                                                               
                                                                                             


















































                                                                              
                                                                                                  













                                                                               
                                                                   









                                                                            
                                                                                                








                                                                               


                                                                 







































                                                                              
                                                                                                  


















                                                                             
                                                                  


















                                                                           
                                                                                                























                                                                         




                                                                               
                                   
                                             
                                     



                   






















                                                                              
                                      

































































































































































































































































































































































































































































                                                                                              
                                                         







































































































                                                                              
                     




                                          
                                                          




















                                                                        
                                                               


































































                                                                           
                                                          







                                                               
      



                                       












                                                                            
                                                                              


                                  


                     



                                                 




                                                                              
                                      



                                      
                                                               

                            

                                                              
                                           
                                          
















                                                     
                                                     
 
                                                 













                                                                              
                                        
 

                                            
















                                                            
                                      






                                                      
                                                            



















































































































                                                                             

                                                                    






                                                 



































                                                                               
                                                                            













































                                                                       
                                              
































































































                                                                         
                                                         

                                            
                                                         


                                            
                                      
                                             



























































































                                                                        
                     



                                                         












































                                                                              




                                                                      















                                                                       
                                       
 
                                                       





                                                         



                                                        

                                                          




                                                
                                            


                                                           
                                            











                                                                          
                                                           




                                                                              
                                                          

                     
                                                    









                                                                      
                                                                    












                                                                              
                                                   



                                                    
                                            






                              
/*
 *
 *			Linux MegaRAID device driver
 *
 * Copyright (c) 2002  LSI Logic Corporation.
 *
 *	   This program is free software; you can redistribute it and/or
 *	   modify it under the terms of the GNU General Public License
 *	   as published by the Free Software Foundation; either version
 *	   2 of the License, or (at your option) any later version.
 *
 * Copyright (c) 2002  Red Hat, Inc. All rights reserved.
 *	  - fixes
 *	  - speed-ups (list handling fixes, issued_list, optimizations.)
 *	  - lots of cleanups.
 *
 * Copyright (c) 2003  Christoph Hellwig  <hch@lst.de>
 *	  - new-style, hotplug-aware pci probing and scsi registration
 *
 * Version : v2.00.4 Mon Nov 14 14:02:43 EST 2005 - Seokmann Ju
 * 						<Seokmann.Ju@lsil.com>
 *
 * Description: Linux device driver for LSI Logic MegaRAID controller
 *
 * Supported controllers: MegaRAID 418, 428, 438, 466, 762, 467, 471, 490, 493
 *					518, 520, 531, 532
 *
 * This driver is supported by LSI Logic, with assistance from Red Hat, Dell,
 * and others. Please send updates to the mailing list
 * linux-scsi@vger.kernel.org .
 *
 */

#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/blkdev.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/reboot.h>
#include <linux/module.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <scsi/scsicam.h>

#include "scsi.h"
#include <scsi/scsi_host.h>

#include "megaraid.h"

#define MEGARAID_MODULE_VERSION "2.00.4"

MODULE_AUTHOR ("sju@lsil.com");
MODULE_DESCRIPTION ("LSI Logic MegaRAID legacy driver");
MODULE_LICENSE ("GPL");
MODULE_VERSION(MEGARAID_MODULE_VERSION);

static DEFINE_MUTEX(megadev_mutex);
static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
module_param(max_cmd_per_lun, uint, 0);
MODULE_PARM_DESC(max_cmd_per_lun, "Maximum number of commands which can be issued to a single LUN (default=DEF_CMD_PER_LUN=63)");

static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO;
module_param(max_sectors_per_io, ushort, 0);
MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)");


static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT;
module_param(max_mbox_busy_wait, ushort, 0);
MODULE_PARM_DESC(max_mbox_busy_wait, "Maximum wait for mailbox in microseconds if busy (default=MBOX_BUSY_WAIT=10)");

#define RDINDOOR(adapter)	readl((adapter)->mmio_base + 0x20)
#define RDOUTDOOR(adapter)	readl((adapter)->mmio_base + 0x2C)
#define WRINDOOR(adapter,value)	 writel(value, (adapter)->mmio_base + 0x20)
#define WROUTDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x2C)

/*
 * Global variables
 */

static int hba_count;
static adapter_t *hba_soft_state[MAX_CONTROLLERS];
static struct proc_dir_entry *mega_proc_dir_entry;

/* For controller re-ordering */
static struct mega_hbas mega_hbas[MAX_CONTROLLERS];

static long
megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);

/*
 * The File Operations structure for the serial/ioctl interface of the driver
 */
static const struct file_operations megadev_fops = {
	.owner		= THIS_MODULE,
	.unlocked_ioctl	= megadev_unlocked_ioctl,
	.open		= megadev_open,
	.llseek		= noop_llseek,
};

/*
 * Array to structures for storing the information about the controllers. This
 * information is sent to the user level applications, when they do an ioctl
 * for this information.
 */
static struct mcontroller mcontroller[MAX_CONTROLLERS];

/* The current driver version */
static u32 driver_ver = 0x02000000;

/* major number used by the device for character interface */
static int major;

#define IS_RAID_CH(hba, ch)	(((hba)->mega_ch_class >> (ch)) & 0x01)


/*
 * Debug variable to print some diagnostic messages
 */
static int trace_level;

/**
 * mega_setup_mailbox()
 * @adapter - pointer to our soft state
 *
 * Allocates a 8 byte aligned memory for the handshake mailbox.
 */
static int
mega_setup_mailbox(adapter_t *adapter)
{
	unsigned long	align;

	adapter->una_mbox64 = pci_alloc_consistent(adapter->dev,
			sizeof(mbox64_t), &adapter->una_mbox64_dma);

	if( !adapter->una_mbox64 ) return -1;
		
	adapter->mbox = &adapter->una_mbox64->mbox;

	adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) &
			(~0UL ^ 0xFUL));

	adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8);

	align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox);

	adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align;

	/*
	 * Register the mailbox if the controller is an io-mapped controller
	 */
	if( adapter->flag & BOARD_IOMAP ) {

		outb(adapter->mbox_dma & 0xFF,
				adapter->host->io_port + MBOX_PORT0);

		outb((adapter->mbox_dma >> 8) & 0xFF,
				adapter->host->io_port + MBOX_PORT1);

		outb((adapter->mbox_dma >> 16) & 0xFF,
				adapter->host->io_port + MBOX_PORT2);

		outb((adapter->mbox_dma >> 24) & 0xFF,
				adapter->host->io_port + MBOX_PORT3);

		outb(ENABLE_MBOX_BYTE,
				adapter->host->io_port + ENABLE_MBOX_REGION);

		irq_ack(adapter);

		irq_enable(adapter);
	}

	return 0;
}


/*
 * mega_query_adapter()
 * @adapter - pointer to our soft state
 *
 * Issue the adapter inquiry commands to the controller and find out
 * information and parameter about the devices attached
 */
static int
mega_query_adapter(adapter_t *adapter)
{
	dma_addr_t	prod_info_dma_handle;
	mega_inquiry3	*inquiry3;
	u8	raw_mbox[sizeof(struct mbox_out)];
	mbox_t	*mbox;
	int	retval;

	/* Initialize adapter inquiry mailbox */

	mbox = (mbox_t *)raw_mbox;

	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
	memset(&mbox->m_out, 0, sizeof(raw_mbox));

	/*
	 * Try to issue Inquiry3 command
	 * if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
	 * update enquiry3 structure
	 */
	mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;

	inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;

	raw_mbox[0] = FC_NEW_CONFIG;		/* i.e. mbox->cmd=0xA1 */
	raw_mbox[2] = NC_SUBOP_ENQUIRY3;	/* i.e. 0x0F */
	raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;	/* i.e. 0x02 */

	/* Issue a blocking command to the card */
	if ((retval = issue_scb_block(adapter, raw_mbox))) {
		/* the adapter does not support 40ld */

		mraid_ext_inquiry	*ext_inq;
		mraid_inquiry		*inq;
		dma_addr_t		dma_handle;

		ext_inq = pci_alloc_consistent(adapter->dev,
				sizeof(mraid_ext_inquiry), &dma_handle);

		if( ext_inq == NULL ) return -1;

		inq = &ext_inq->raid_inq;

		mbox->m_out.xferaddr = (u32)dma_handle;

		/*issue old 0x04 command to adapter */
		mbox->m_out.cmd = MEGA_MBOXCMD_ADPEXTINQ;

		issue_scb_block(adapter, raw_mbox);

		/*
		 * update Enquiry3 and ProductInfo structures with
		 * mraid_inquiry structure
		 */
		mega_8_to_40ld(inq, inquiry3,
				(mega_product_info *)&adapter->product_info);

		pci_free_consistent(adapter->dev, sizeof(mraid_ext_inquiry),
				ext_inq, dma_handle);

	} else {		/*adapter supports 40ld */
		adapter->flag |= BOARD_40LD;

		/*
		 * get product_info, which is static information and will be
		 * unchanged
		 */
		prod_info_dma_handle = pci_map_single(adapter->dev, (void *)
				&adapter->product_info,
				sizeof(mega_product_info), PCI_DMA_FROMDEVICE);

		mbox->m_out.xferaddr = prod_info_dma_handle;

		raw_mbox[0] = FC_NEW_CONFIG;	/* i.e. mbox->cmd=0xA1 */
		raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;	/* i.e. 0x0E */

		if ((retval = issue_scb_block(adapter, raw_mbox)))
			printk(KERN_WARNING
			"megaraid: Product_info cmd failed with error: %d\n",
				retval);

		pci_unmap_single(adapter->dev, prod_info_dma_handle,
				sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
	}


	/*
	 * kernel scans the channels from 0 to <= max_channel
	 */
	adapter->host->max_channel =
		adapter->product_info.nchannels + NVIRT_CHAN -1;

	adapter->host->max_id = 16;	/* max targets per channel */

	adapter->host->max_lun = 7;	/* Up to 7 luns for non disk devices */

	adapter->host->cmd_per_lun = max_cmd_per_lun;

	adapter->numldrv = inquiry3->num_ldrv;

	adapter->max_cmds = adapter->product_info.max_commands;

	if(adapter->max_cmds > MAX_COMMANDS)
		adapter->max_cmds = MAX_COMMANDS;

	adapter->host->can_queue = adapter->max_cmds - 1;

	/*
	 * Get the maximum number of scatter-gather elements supported by this
	 * firmware
	 */
	mega_get_max_sgl(adapter);

	adapter->host->sg_tablesize = adapter->sglen;

	/* use HP firmware and bios version encoding
	   Note: fw_version[0|1] and bios_version[0|1] were originally shifted
	   right 8 bits making them zero. This 0 value was hardcoded to fix
	   sparse warnings. */
	if (adapter->product_info.subsysvid == PCI_VENDOR_ID_HP) {
		sprintf (adapter->fw_version, "%c%d%d.%d%d",
			 adapter->product_info.fw_version[2],
			 0,
			 adapter->product_info.fw_version[1] & 0x0f,
			 0,
			 adapter->product_info.fw_version[0] & 0x0f);
		sprintf (adapter->bios_version, "%c%d%d.%d%d",
			 adapter->product_info.bios_version[2],
			 0,
			 adapter->product_info.bios_version[1] & 0x0f,
			 0,
			 adapter->product_info.bios_version[0] & 0x0f);
	} else {
		memcpy(adapter->fw_version,
				(char *)adapter->product_info.fw_version, 4);
		adapter->fw_version[4] = 0;

		memcpy(adapter->bios_version,
				(char *)adapter->product_info.bios_version, 4);

		adapter->bios_version[4] = 0;
	}

	printk(KERN_NOTICE "megaraid: [%s:%s] detected %d logical drives.\n",
		adapter->fw_version, adapter->bios_version, adapter->numldrv);

	/*
	 * Do we support extended (>10 bytes) cdbs
	 */
	adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
	if (adapter->support_ext_cdb)
		printk(KERN_NOTICE "megaraid: supports extended CDBs.\n");


	return 0;
}

/**
 * mega_runpendq()
 * @adapter - pointer to our soft state
 *
 * Runs through the list of pending requests.
 */
static inline void
mega_runpendq(adapter_t *adapter)
{
	if(!list_empty(&adapter->pending_list))
		__mega_runpendq(adapter);
}

/*
 * megaraid_queue()
 * @scmd - Issue this scsi command
 * @done - the callback hook into the scsi mid-layer
 *
 * The command queuing entry point for the mid-layer.
 */
static int
megaraid_queue_lck(Scsi_Cmnd *scmd, void (*done)(Scsi_Cmnd *))
{
	adapter_t	*adapter;
	scb_t	*scb;
	int	busy=0;
	unsigned long flags;

	adapter = (adapter_t *)scmd->device->host->hostdata;

	scmd->scsi_done = done;


	/*
	 * Allocate and build a SCB request
	 * busy flag will be set if mega_build_cmd() command could not
	 * allocate scb. We will return non-zero status in that case.
	 * NOTE: scb can be null even though certain commands completed
	 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, we would
	 * return 0 in that case.
	 */

	spin_lock_irqsave(&adapter->lock, flags);
	scb = mega_build_cmd(adapter, scmd, &busy);
	if (!scb)
		goto out;

	scb->state |= SCB_PENDQ;
	list_add_tail(&scb->list, &adapter->pending_list);

	/*
	 * Check if the HBA is in quiescent state, e.g., during a
	 * delete logical drive opertion. If it is, don't run
	 * the pending_list.
	 */
	if (atomic_read(&adapter->quiescent) == 0)
		mega_runpendq(adapter);

	busy = 0;
 out:
	spin_unlock_irqrestore(&adapter->lock, flags);
	return busy;
}

static DEF_SCSI_QCMD(megaraid_queue)

/**
 * mega_allocate_scb()
 * @adapter - pointer to our soft state
 * @cmd - scsi command from the mid-layer
 *
 * Allocate a SCB structure. This is the central structure for controller
 * commands.
 */
static inline scb_t *
mega_allocate_scb(adapter_t *adapter, Scsi_Cmnd *cmd)
{
	struct list_head *head = &adapter->free_list;
	scb_t	*scb;

	/* Unlink command from Free List */
	if( !list_empty(head) ) {

		scb = list_entry(head->next, scb_t, list);

		list_del_init(head->next);

		scb->state = SCB_ACTIVE;
		scb->cmd = cmd;
		scb->dma_type = MEGA_DMA_TYPE_NONE;

		return scb;
	}

	return NULL;
}

/**
 * mega_get_ldrv_num()
 * @adapter - pointer to our soft state
 * @cmd - scsi mid layer command
 * @channel - channel on the controller
 *
 * Calculate the logical drive number based on the information in scsi command
 * and the channel number.
 */
static inline int
mega_get_ldrv_num(adapter_t *adapter, Scsi_Cmnd *cmd, int channel)
{
	int		tgt;
	int		ldrv_num;

	tgt = cmd->device->id;
	
	if ( tgt > adapter->this_id )
		tgt--;	/* we do not get inquires for initiator id */

	ldrv_num = (channel * 15) + tgt;


	/*
	 * If we have a logical drive with boot enabled, project it first
	 */
	if( adapter->boot_ldrv_enabled ) {
		if( ldrv_num == 0 ) {
			ldrv_num = adapter->boot_ldrv;
		}
		else {
			if( ldrv_num <= adapter->boot_ldrv ) {
				ldrv_num--;
			}
		}
	}

	/*
	 * If "delete logical drive" feature is enabled on this controller.
	 * Do only if at least one delete logical drive operation was done.
	 *
	 * Also, after logical drive deletion, instead of logical drive number,
	 * the value returned should be 0x80+logical drive id.
	 *
	 * These is valid only for IO commands.
	 */

	if (adapter->support_random_del && adapter->read_ldidmap )
		switch (cmd->cmnd[0]) {
		case READ_6:	/* fall through */
		case WRITE_6:	/* fall through */
		case READ_10:	/* fall through */
		case WRITE_10:
			ldrv_num += 0x80;
		}

	return ldrv_num;
}

/**
 * mega_build_cmd()
 * @adapter - pointer to our soft state
 * @cmd - Prepare using this scsi command
 * @busy - busy flag if no resources
 *
 * Prepares a command and scatter gather list for the controller. This routine
 * also finds out if the commands is intended for a logical drive or a
 * physical device and prepares the controller command accordingly.
 *
 * We also re-order the logical drives and physical devices based on their
 * boot settings.
 */
static scb_t *
mega_build_cmd(adapter_t *adapter, Scsi_Cmnd *cmd, int *busy)
{
	mega_ext_passthru	*epthru;
	mega_passthru	*pthru;
	scb_t	*scb;
	mbox_t	*mbox;
	u32	seg;
	char	islogical;
	int	max_ldrv_num;
	int	channel = 0;
	int	target = 0;
	int	ldrv_num = 0;   /* logical drive number */


	/*
	 * filter the internal and ioctl commands
	 */
	if((cmd->cmnd[0] == MEGA_INTERNAL_CMD))
		return (scb_t *)cmd->host_scribble;

	/*
	 * We know what channels our logical drives are on - mega_find_card()
	 */
	islogical = adapter->logdrv_chan[cmd->device->channel];

	/*
	 * The theory: If physical drive is chosen for boot, all the physical
	 * devices are exported before the logical drives, otherwise physical
	 * devices are pushed after logical drives, in which case - Kernel sees
	 * the physical devices on virtual channel which is obviously converted
	 * to actual channel on the HBA.
	 */
	if( adapter->boot_pdrv_enabled ) {
		if( islogical ) {
			/* logical channel */
			channel = cmd->device->channel -
				adapter->product_info.nchannels;
		}
		else {
			/* this is physical channel */
			channel = cmd->device->channel; 
			target = cmd->device->id;

			/*
			 * boot from a physical disk, that disk needs to be
			 * exposed first IF both the channels are SCSI, then
			 * booting from the second channel is not allowed.
			 */
			if( target == 0 ) {
				target = adapter->boot_pdrv_tgt;
			}
			else if( target == adapter->boot_pdrv_tgt ) {
				target = 0;
			}
		}
	}
	else {
		if( islogical ) {
			/* this is the logical channel */
			channel = cmd->device->channel;	
		}
		else {
			/* physical channel */
			channel = cmd->device->channel - NVIRT_CHAN;	
			target = cmd->device->id;
		}
	}


	if(islogical) {

		/* have just LUN 0 for each target on virtual channels */
		if (cmd->device->lun) {
			cmd->result = (DID_BAD_TARGET << 16);
			cmd->scsi_done(cmd);
			return NULL;
		}

		ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);


		max_ldrv_num = (adapter->flag & BOARD_40LD) ?
			MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;

		/*
		 * max_ldrv_num increases by 0x80 if some logical drive was
		 * deleted.
		 */
		if(adapter->read_ldidmap)
			max_ldrv_num += 0x80;

		if(ldrv_num > max_ldrv_num ) {
			cmd->result = (DID_BAD_TARGET << 16);
			cmd->scsi_done(cmd);
			return NULL;
		}

	}
	else {
		if( cmd->device->lun > 7) {
			/*
			 * Do not support lun >7 for physically accessed
			 * devices
			 */
			cmd->result = (DID_BAD_TARGET << 16);
			cmd->scsi_done(cmd);
			return NULL;
		}
	}

	/*
	 *
	 * Logical drive commands
	 *
	 */
	if(islogical) {
		switch (cmd->cmnd[0]) {
		case TEST_UNIT_READY:
#if MEGA_HAVE_CLUSTERING
			/*
			 * Do we support clustering and is the support enabled
			 * If no, return success always
			 */
			if( !adapter->has_cluster ) {
				cmd->result = (DID_OK << 16);
				cmd->scsi_done(cmd);
				return NULL;
			}

			if(!(scb = mega_allocate_scb(adapter, cmd))) {
				*busy = 1;
				return NULL;
			}

			scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
			scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
			scb->raw_mbox[3] = ldrv_num;

			scb->dma_direction = PCI_DMA_NONE;

			return scb;
#else
			cmd->result = (DID_OK << 16);
			cmd->scsi_done(cmd);
			return NULL;
#endif

		case MODE_SENSE: {
			char *buf;
			struct scatterlist *sg;

			sg = scsi_sglist(cmd);
			buf = kmap_atomic(sg_page(sg)) + sg->offset;

			memset(buf, 0, cmd->cmnd[4]);
			kunmap_atomic(buf - sg->offset);

			cmd->result = (DID_OK << 16);
			cmd->scsi_done(cmd);
			return NULL;
		}

		case READ_CAPACITY:
		case INQUIRY:

			if(!(adapter->flag & (1L << cmd->device->channel))) {

				printk(KERN_NOTICE
					"scsi%d: scanning scsi channel %d ",
						adapter->host->host_no,
						cmd->device->channel);
				printk("for logical drives.\n");

				adapter->flag |= (1L << cmd->device->channel);
			}

			/* Allocate a SCB and initialize passthru */
			if(!(scb = mega_allocate_scb(adapter, cmd))) {
				*busy = 1;
				return NULL;
			}
			pthru = scb->pthru;

			mbox = (mbox_t *)scb->raw_mbox;
			memset(mbox, 0, sizeof(scb->raw_mbox));
			memset(pthru, 0, sizeof(mega_passthru));

			pthru->timeout = 0;
			pthru->ars = 1;
			pthru->reqsenselen = 14;
			pthru->islogical = 1;
			pthru->logdrv = ldrv_num;
			pthru->cdblen = cmd->cmd_len;
			memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);

			if( adapter->has_64bit_addr ) {
				mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
			}
			else {
				mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
			}

			scb->dma_direction = PCI_DMA_FROMDEVICE;

			pthru->numsgelements = mega_build_sglist(adapter, scb,
				&pthru->dataxferaddr, &pthru->dataxferlen);

			mbox->m_out.xferaddr = scb->pthru_dma_addr;

			return scb;

		case READ_6:
		case WRITE_6:
		case READ_10:
		case WRITE_10:
		case READ_12:
		case WRITE_12:

			/* Allocate a SCB and initialize mailbox */
			if(!(scb = mega_allocate_scb(adapter, cmd))) {
				*busy = 1;
				return NULL;
			}
			mbox = (mbox_t *)scb->raw_mbox;

			memset(mbox, 0, sizeof(scb->raw_mbox));
			mbox->m_out.logdrv = ldrv_num;

			/*
			 * A little hack: 2nd bit is zero for all scsi read
			 * commands and is set for all scsi write commands
			 */
			if( adapter->has_64bit_addr ) {
				mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
					MEGA_MBOXCMD_LWRITE64:
					MEGA_MBOXCMD_LREAD64 ;
			}
			else {
				mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
					MEGA_MBOXCMD_LWRITE:
					MEGA_MBOXCMD_LREAD ;
			}

			/*
			 * 6-byte READ(0x08) or WRITE(0x0A) cdb
			 */
			if( cmd->cmd_len == 6 ) {
				mbox->m_out.numsectors = (u32) cmd->cmnd[4];
				mbox->m_out.lba =
					((u32)cmd->cmnd[1] << 16) |
					((u32)cmd->cmnd[2] << 8) |
					(u32)cmd->cmnd[3];

				mbox->m_out.lba &= 0x1FFFFF;

#if MEGA_HAVE_STATS
				/*
				 * Take modulo 0x80, since the logical drive
				 * number increases by 0x80 when a logical
				 * drive was deleted
				 */
				if (*cmd->cmnd == READ_6) {
					adapter->nreads[ldrv_num%0x80]++;
					adapter->nreadblocks[ldrv_num%0x80] +=
						mbox->m_out.numsectors;
				} else {
					adapter->nwrites[ldrv_num%0x80]++;
					adapter->nwriteblocks[ldrv_num%0x80] +=
						mbox->m_out.numsectors;
				}
#endif
			}

			/*
			 * 10-byte READ(0x28) or WRITE(0x2A) cdb
			 */
			if( cmd->cmd_len == 10 ) {
				mbox->m_out.numsectors =
					(u32)cmd->cmnd[8] |
					((u32)cmd->cmnd[7] << 8);
				mbox->m_out.lba =
					((u32)cmd->cmnd[2] << 24) |
					((u32)cmd->cmnd[3] << 16) |
					((u32)cmd->cmnd[4] << 8) |
					(u32)cmd->cmnd[5];

#if MEGA_HAVE_STATS
				if (*cmd->cmnd == READ_10) {
					adapter->nreads[ldrv_num%0x80]++;
					adapter->nreadblocks[ldrv_num%0x80] +=
						mbox->m_out.numsectors;
				} else {
					adapter->nwrites[ldrv_num%0x80]++;
					adapter->nwriteblocks[ldrv_num%0x80] +=
						mbox->m_out.numsectors;
				}
#endif
			}

			/*
			 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
			 */
			if( cmd->cmd_len == 12 ) {
				mbox->m_out.lba =
					((u32)cmd->cmnd[2] << 24) |
					((u32)cmd->cmnd[3] << 16) |
					((u32)cmd->cmnd[4] << 8) |
					(u32)cmd->cmnd[5];

				mbox->m_out.numsectors =
					((u32)cmd->cmnd[6] << 24) |
					((u32)cmd->cmnd[7] << 16) |
					((u32)cmd->cmnd[8] << 8) |
					(u32)cmd->cmnd[9];

#if MEGA_HAVE_STATS
				if (*cmd->cmnd == READ_12) {
					adapter->nreads[ldrv_num%0x80]++;
					adapter->nreadblocks[ldrv_num%0x80] +=
						mbox->m_out.numsectors;
				} else {
					adapter->nwrites[ldrv_num%0x80]++;
					adapter->nwriteblocks[ldrv_num%0x80] +=
						mbox->m_out.numsectors;
				}
#endif
			}

			/*
			 * If it is a read command
			 */
			if( (*cmd->cmnd & 0x0F) == 0x08 ) {
				scb->dma_direction = PCI_DMA_FROMDEVICE;
			}
			else {
				scb->dma_direction = PCI_DMA_TODEVICE;
			}

			/* Calculate Scatter-Gather info */
			mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
					(u32 *)&mbox->m_out.xferaddr, &seg);

			return scb;

#if MEGA_HAVE_CLUSTERING
		case RESERVE:	/* Fall through */
		case RELEASE:

			/*
			 * Do we support clustering and is the support enabled
			 */
			if( ! adapter->has_cluster ) {

				cmd->result = (DID_BAD_TARGET << 16);
				cmd->scsi_done(cmd);
				return NULL;
			}

			/* Allocate a SCB and initialize mailbox */
			if(!(scb = mega_allocate_scb(adapter, cmd))) {
				*busy = 1;
				return NULL;
			}

			scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
			scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
				MEGA_RESERVE_LD : MEGA_RELEASE_LD;

			scb->raw_mbox[3] = ldrv_num;

			scb->dma_direction = PCI_DMA_NONE;

			return scb;
#endif

		default:
			cmd->result = (DID_BAD_TARGET << 16);
			cmd->scsi_done(cmd);
			return NULL;
		}
	}

	/*
	 * Passthru drive commands
	 */
	else {
		/* Allocate a SCB and initialize passthru */
		if(!(scb = mega_allocate_scb(adapter, cmd))) {
			*busy = 1;
			return NULL;
		}

		mbox = (mbox_t *)scb->raw_mbox;
		memset(mbox, 0, sizeof(scb->raw_mbox));

		if( adapter->support_ext_cdb ) {

			epthru = mega_prepare_extpassthru(adapter, scb, cmd,
					channel, target);

			mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;

			mbox->m_out.xferaddr = scb->epthru_dma_addr;

		}
		else {

			pthru = mega_prepare_passthru(adapter, scb, cmd,
					channel, target);

			/* Initialize mailbox */
			if( adapter->has_64bit_addr ) {
				mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
			}
			else {
				mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
			}

			mbox->m_out.xferaddr = scb->pthru_dma_addr;

		}
		return scb;
	}
	return NULL;
}


/**
 * mega_prepare_passthru()
 * @adapter - pointer to our soft state
 * @scb - our scsi control block
 * @cmd - scsi command from the mid-layer
 * @channel - actual channel on the controller
 * @target - actual id on the controller.
 *
 * prepare a command for the scsi physical devices.
 */
static mega_passthru *
mega_prepare_passthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
		int channel, int target)
{
	mega_passthru *pthru;

	pthru = scb->pthru;
	memset(pthru, 0, sizeof (mega_passthru));

	/* 0=6sec/1=60sec/2=10min/3=3hrs */
	pthru->timeout = 2;

	pthru->ars = 1;
	pthru->reqsenselen = 14;
	pthru->islogical = 0;

	pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;

	pthru->target = (adapter->flag & BOARD_40LD) ?
		(channel << 4) | target : target;

	pthru->cdblen = cmd->cmd_len;
	pthru->logdrv = cmd->device->lun;

	memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);

	/* Not sure about the direction */
	scb->dma_direction = PCI_DMA_BIDIRECTIONAL;

	/* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
	switch (cmd->cmnd[0]) {
	case INQUIRY:
	case READ_CAPACITY:
		if(!(adapter->flag & (1L << cmd->device->channel))) {

			printk(KERN_NOTICE
				"scsi%d: scanning scsi channel %d [P%d] ",
					adapter->host->host_no,
					cmd->device->channel, channel);
			printk("for physical devices.\n");

			adapter->flag |= (1L << cmd->device->channel);
		}
		/* Fall through */
	default:
		pthru->numsgelements = mega_build_sglist(adapter, scb,
				&pthru->dataxferaddr, &pthru->dataxferlen);
		break;
	}
	return pthru;
}


/**
 * mega_prepare_extpassthru()
 * @adapter - pointer to our soft state
 * @scb - our scsi control block
 * @cmd - scsi command from the mid-layer
 * @channel - actual channel on the controller
 * @target - actual id on the controller.
 *
 * prepare a command for the scsi physical devices. This rountine prepares
 * commands for devices which can take extended CDBs (>10 bytes)
 */
static mega_ext_passthru *
mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
		int channel, int target)
{
	mega_ext_passthru	*epthru;

	epthru = scb->epthru;
	memset(epthru, 0, sizeof(mega_ext_passthru));

	/* 0=6sec/1=60sec/2=10min/3=3hrs */
	epthru->timeout = 2;

	epthru->ars = 1;
	epthru->reqsenselen = 14;
	epthru->islogical = 0;

	epthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
	epthru->target = (adapter->flag & BOARD_40LD) ?
		(channel << 4) | target : target;

	epthru->cdblen = cmd->cmd_len;
	epthru->logdrv = cmd->device->lun;

	memcpy(epthru->cdb, cmd->cmnd, cmd->cmd_len);

	/* Not sure about the direction */
	scb->dma_direction = PCI_DMA_BIDIRECTIONAL;

	switch(cmd->cmnd[0]) {
	case INQUIRY:
	case READ_CAPACITY:
		if(!(adapter->flag & (1L << cmd->device->channel))) {

			printk(KERN_NOTICE
				"scsi%d: scanning scsi channel %d [P%d] ",
					adapter->host->host_no,
					cmd->device->channel, channel);
			printk("for physical devices.\n");

			adapter->flag |= (1L << cmd->device->channel);
		}
		/* Fall through */
	default:
		epthru->numsgelements = mega_build_sglist(adapter, scb,
				&epthru->dataxferaddr, &epthru->dataxferlen);
		break;
	}

	return epthru;
}

static void
__mega_runpendq(adapter_t *adapter)
{
	scb_t *scb;
	struct list_head *pos, *next;

	/* Issue any pending commands to the card */
	list_for_each_safe(pos, next, &adapter->pending_list) {

		scb = list_entry(pos, scb_t, list);

		if( !(scb->state & SCB_ISSUED) ) {

			if( issue_scb(adapter, scb) != 0 )
				return;
		}
	}

	return;
}


/**
 * issue_scb()
 * @adapter - pointer to our soft state
 * @scb - scsi control block
 *
 * Post a command to the card if the mailbox is available, otherwise return
 * busy. We also take the scb from the pending list if the mailbox is
 * available.
 */
static int
issue_scb(adapter_t *adapter, scb_t *scb)
{
	volatile mbox64_t	*mbox64 = adapter->mbox64;
	volatile mbox_t		*mbox = adapter->mbox;
	unsigned int	i = 0;

	if(unlikely(mbox->m_in.busy)) {
		do {
			udelay(1);
			i++;
		} while( mbox->m_in.busy && (i < max_mbox_busy_wait) );

		if(mbox->m_in.busy) return -1;
	}

	/* Copy mailbox data into host structure */
	memcpy((char *)&mbox->m_out, (char *)scb->raw_mbox, 
			sizeof(struct mbox_out));

	mbox->m_out.cmdid = scb->idx;	/* Set cmdid */
	mbox->m_in.busy = 1;		/* Set busy */


	/*
	 * Increment the pending queue counter
	 */
	atomic_inc(&adapter->pend_cmds);

	switch (mbox->m_out.cmd) {
	case MEGA_MBOXCMD_LREAD64:
	case MEGA_MBOXCMD_LWRITE64:
	case MEGA_MBOXCMD_PASSTHRU64:
	case MEGA_MBOXCMD_EXTPTHRU:
		mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
		mbox64->xfer_segment_hi = 0;
		mbox->m_out.xferaddr = 0xFFFFFFFF;
		break;
	default:
		mbox64->xfer_segment_lo = 0;
		mbox64->xfer_segment_hi = 0;
	}

	/*
	 * post the command
	 */
	scb->state |= SCB_ISSUED;

	if( likely(adapter->flag & BOARD_MEMMAP) ) {
		mbox->m_in.poll = 0;
		mbox->m_in.ack = 0;
		WRINDOOR(adapter, adapter->mbox_dma | 0x1);
	}
	else {
		irq_enable(adapter);
		issue_command(adapter);
	}

	return 0;
}

/*
 * Wait until the controller's mailbox is available
 */
static inline int
mega_busywait_mbox (adapter_t *adapter)
{
	if (adapter->mbox->m_in.busy)
		return __mega_busywait_mbox(adapter);
	return 0;
}

/**
 * issue_scb_block()
 * @adapter - pointer to our soft state
 * @raw_mbox - the mailbox
 *
 * Issue a scb in synchronous and non-interrupt mode
 */
static int
issue_scb_block(adapter_t *adapter, u_char *raw_mbox)
{
	volatile mbox64_t *mbox64 = adapter->mbox64;
	volatile mbox_t *mbox = adapter->mbox;
	u8	byte;

	/* Wait until mailbox is free */
	if(mega_busywait_mbox (adapter))
		goto bug_blocked_mailbox;

	/* Copy mailbox data into host structure */
	memcpy((char *) mbox, raw_mbox, sizeof(struct mbox_out));
	mbox->m_out.cmdid = 0xFE;
	mbox->m_in.busy = 1;

	switch (raw_mbox[0]) {
	case MEGA_MBOXCMD_LREAD64:
	case MEGA_MBOXCMD_LWRITE64:
	case MEGA_MBOXCMD_PASSTHRU64:
	case MEGA_MBOXCMD_EXTPTHRU:
		mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
		mbox64->xfer_segment_hi = 0;
		mbox->m_out.xferaddr = 0xFFFFFFFF;
		break;
	default:
		mbox64->xfer_segment_lo = 0;
		mbox64->xfer_segment_hi = 0;
	}

	if( likely(adapter->flag & BOARD_MEMMAP) ) {
		mbox->m_in.poll = 0;
		mbox->m_in.ack = 0;
		mbox->m_in.numstatus = 0xFF;
		mbox->m_in.status = 0xFF;
		WRINDOOR(adapter, adapter->mbox_dma | 0x1);

		while((volatile u8)mbox->m_in.numstatus == 0xFF)
			cpu_relax();

		mbox->m_in.numstatus = 0xFF;

		while( (volatile u8)mbox->m_in.poll != 0x77 )
			cpu_relax();

		mbox->m_in.poll = 0;
		mbox->m_in.ack = 0x77;

		WRINDOOR(adapter, adapter->mbox_dma | 0x2);

		while(RDINDOOR(adapter) & 0x2)
			cpu_relax();
	}
	else {
		irq_disable(adapter);
		issue_command(adapter);

		while (!((byte = irq_state(adapter)) & INTR_VALID))
			cpu_relax();

		set_irq_state(adapter, byte);
		irq_enable(adapter);
		irq_ack(adapter);
	}

	return mbox->m_in.status;

bug_blocked_mailbox:
	printk(KERN_WARNING "megaraid: Blocked mailbox......!!\n");
	udelay (1000);
	return -1;
}


/**
 * megaraid_isr_iomapped()
 * @irq - irq
 * @devp - pointer to our soft state
 *
 * Interrupt service routine for io-mapped controllers.
 * Find out if our device is interrupting. If yes, acknowledge the interrupt
 * and service the completed commands.
 */
static irqreturn_t
megaraid_isr_iomapped(int irq, void *devp)
{
	adapter_t	*adapter = devp;
	unsigned long	flags;
	u8	status;
	u8	nstatus;
	u8	completed[MAX_FIRMWARE_STATUS];
	u8	byte;
	int	handled = 0;


	/*
	 * loop till F/W has more commands for us to complete.
	 */
	spin_lock_irqsave(&adapter->lock, flags);

	do {
		/* Check if a valid interrupt is pending */
		byte = irq_state(adapter);
		if( (byte & VALID_INTR_BYTE) == 0 ) {
			/*
			 * No more pending commands
			 */
			goto out_unlock;
		}
		set_irq_state(adapter, byte);

		while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
				== 0xFF)
			cpu_relax();
		adapter->mbox->m_in.numstatus = 0xFF;

		status = adapter->mbox->m_in.status;

		/*
		 * decrement the pending queue counter
		 */
		atomic_sub(nstatus, &adapter->pend_cmds);

		memcpy(completed, (void *)adapter->mbox->m_in.completed, 
				nstatus);

		/* Acknowledge interrupt */
		irq_ack(adapter);

		mega_cmd_done(adapter, completed, nstatus, status);

		mega_rundoneq(adapter);

		handled = 1;

		/* Loop through any pending requests */
		if(atomic_read(&adapter->quiescent) == 0) {
			mega_runpendq(adapter);
		}

	} while(1);

 out_unlock:

	spin_unlock_irqrestore(&adapter->lock, flags);

	return IRQ_RETVAL(handled);
}


/**
 * megaraid_isr_memmapped()
 * @irq - irq
 * @devp - pointer to our soft state
 *
 * Interrupt service routine for memory-mapped controllers.
 * Find out if our device is interrupting. If yes, acknowledge the interrupt
 * and service the completed commands.
 */
static irqreturn_t
megaraid_isr_memmapped(int irq, void *devp)
{
	adapter_t	*adapter = devp;
	unsigned long	flags;
	u8	status;
	u32	dword = 0;
	u8	nstatus;
	u8	completed[MAX_FIRMWARE_STATUS];
	int	handled = 0;


	/*
	 * loop till F/W has more commands for us to complete.
	 */
	spin_lock_irqsave(&adapter->lock, flags);

	do {
		/* Check if a valid interrupt is pending */
		dword = RDOUTDOOR(adapter);
		if(dword != 0x10001234) {
			/*
			 * No more pending commands
			 */
			goto out_unlock;
		}
		WROUTDOOR(adapter, 0x10001234);

		while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
				== 0xFF) {
			cpu_relax();
		}
		adapter->mbox->m_in.numstatus = 0xFF;

		status = adapter->mbox->m_in.status;

		/*
		 * decrement the pending queue counter
		 */
		atomic_sub(nstatus, &adapter->pend_cmds);

		memcpy(completed, (void *)adapter->mbox->m_in.completed, 
				nstatus);

		/* Acknowledge interrupt */
		WRINDOOR(adapter, 0x2);

		handled = 1;

		while( RDINDOOR(adapter) & 0x02 )
			cpu_relax();

		mega_cmd_done(adapter, completed, nstatus, status);

		mega_rundoneq(adapter);

		/* Loop through any pending requests */
		if(atomic_read(&adapter->quiescent) == 0) {
			mega_runpendq(adapter);
		}

	} while(1);

 out_unlock:

	spin_unlock_irqrestore(&adapter->lock, flags);

	return IRQ_RETVAL(handled);
}
/**
 * mega_cmd_done()
 * @adapter - pointer to our soft state
 * @completed - array of ids of completed commands
 * @nstatus - number of completed commands
 * @status - status of the last command completed
 *
 * Complete the commands and call the scsi mid-layer callback hooks.
 */
static void
mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status)
{
	mega_ext_passthru	*epthru = NULL;
	struct scatterlist	*sgl;
	Scsi_Cmnd	*cmd = NULL;
	mega_passthru	*pthru = NULL;
	mbox_t	*mbox = NULL;
	u8	c;
	scb_t	*scb;
	int	islogical;
	int	cmdid;
	int	i;

	/*
	 * for all the commands completed, call the mid-layer callback routine
	 * and free the scb.
	 */
	for( i = 0; i < nstatus; i++ ) {

		cmdid = completed[i];

		if( cmdid == CMDID_INT_CMDS ) { /* internal command */
			scb = &adapter->int_scb;
			cmd = scb->cmd;
			mbox = (mbox_t *)scb->raw_mbox;

			/*
			 * Internal command interface do not fire the extended
			 * passthru or 64-bit passthru
			 */
			pthru = scb->pthru;

		}
		else {
			scb = &adapter->scb_list[cmdid];

			/*
			 * Make sure f/w has completed a valid command
			 */
			if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
				printk(KERN_CRIT
					"megaraid: invalid command ");
				printk("Id %d, scb->state:%x, scsi cmd:%p\n",
					cmdid, scb->state, scb->cmd);

				continue;
			}

			/*
			 * Was a abort issued for this command
			 */
			if( scb->state & SCB_ABORT ) {

				printk(KERN_WARNING
				"megaraid: aborted cmd [%x] complete.\n",
					scb->idx);

				scb->cmd->result = (DID_ABORT << 16);

				list_add_tail(SCSI_LIST(scb->cmd),
						&adapter->completed_list);

				mega_free_scb(adapter, scb);

				continue;
			}

			/*
			 * Was a reset issued for this command
			 */
			if( scb->state & SCB_RESET ) {

				printk(KERN_WARNING
				"megaraid: reset cmd [%x] complete.\n",
					scb->idx);

				scb->cmd->result = (DID_RESET << 16);

				list_add_tail(SCSI_LIST(scb->cmd),
						&adapter->completed_list);

				mega_free_scb (adapter, scb);

				continue;
			}

			cmd = scb->cmd;
			pthru = scb->pthru;
			epthru = scb->epthru;
			mbox = (mbox_t *)scb->raw_mbox;

#if MEGA_HAVE_STATS
			{

			int	logdrv = mbox->m_out.logdrv;

			islogical = adapter->logdrv_chan[cmd->channel];
			/*
			 * Maintain an error counter for the logical drive.
			 * Some application like SNMP agent need such
			 * statistics
			 */
			if( status && islogical && (cmd->cmnd[0] == READ_6 ||
						cmd->cmnd[0] == READ_10 ||
						cmd->cmnd[0] == READ_12)) {
				/*
				 * Logical drive number increases by 0x80 when
				 * a logical drive is deleted
				 */
				adapter->rd_errors[logdrv%0x80]++;
			}

			if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
						cmd->cmnd[0] == WRITE_10 ||
						cmd->cmnd[0] == WRITE_12)) {
				/*
				 * Logical drive number increases by 0x80 when
				 * a logical drive is deleted
				 */
				adapter->wr_errors[logdrv%0x80]++;
			}

			}
#endif
		}

		/*
		 * Do not return the presence of hard disk on the channel so,
		 * inquiry sent, and returned data==hard disk or removable
		 * hard disk and not logical, request should return failure! -
		 * PJ
		 */
		islogical = adapter->logdrv_chan[cmd->device->channel];
		if( cmd->cmnd[0] == INQUIRY && !islogical ) {

			sgl = scsi_sglist(cmd);
			if( sg_page(sgl) ) {
				c = *(unsigned char *) sg_virt(&sgl[0]);
			} else {
				printk(KERN_WARNING
				       "megaraid: invalid sg.\n");
				c = 0;
			}

			if(IS_RAID_CH(adapter, cmd->device->channel) &&
					((c & 0x1F ) == TYPE_DISK)) {
				status = 0xF0;
			}
		}

		/* clear result; otherwise, success returns corrupt value */
		cmd->result = 0;

		/* Convert MegaRAID status to Linux error code */
		switch (status) {
		case 0x00:	/* SUCCESS , i.e. SCSI_STATUS_GOOD */
			cmd->result |= (DID_OK << 16);
			break;

		case 0x02:	/* ERROR_ABORTED, i.e.
				   SCSI_STATUS_CHECK_CONDITION */

			/* set sense_buffer and result fields */
			if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
				mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {

				memcpy(cmd->sense_buffer, pthru->reqsensearea,
						14);

				cmd->result = (DRIVER_SENSE << 24) |
					(DID_OK << 16) |
					(CHECK_CONDITION << 1);
			}
			else {
				if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {

					memcpy(cmd->sense_buffer,
						epthru->reqsensearea, 14);

					cmd->result = (DRIVER_SENSE << 24) |
						(DID_OK << 16) |
						(CHECK_CONDITION << 1);
				} else {
					cmd->sense_buffer[0] = 0x70;
					cmd->sense_buffer[2] = ABORTED_COMMAND;
					cmd->result |= (CHECK_CONDITION << 1);
				}
			}
			break;

		case 0x08:	/* ERR_DEST_DRIVE_FAILED, i.e.
				   SCSI_STATUS_BUSY */
			cmd->result |= (DID_BUS_BUSY << 16) | status;
			break;

		default:
#if MEGA_HAVE_CLUSTERING
			/*
			 * If TEST_UNIT_READY fails, we know
			 * MEGA_RESERVATION_STATUS failed
			 */
			if( cmd->cmnd[0] == TEST_UNIT_READY ) {
				cmd->result |= (DID_ERROR << 16) |
					(RESERVATION_CONFLICT << 1);
			}
			else
			/*
			 * Error code returned is 1 if Reserve or Release
			 * failed or the input parameter is invalid
			 */
			if( status == 1 &&
				(cmd->cmnd[0] == RESERVE ||
					 cmd->cmnd[0] == RELEASE) ) {

				cmd->result |= (DID_ERROR << 16) |
					(RESERVATION_CONFLICT << 1);
			}
			else
#endif
				cmd->result |= (DID_BAD_TARGET << 16)|status;
		}

		/*
		 * Only free SCBs for the commands coming down from the
		 * mid-layer, not for which were issued internally
		 *
		 * For internal command, restore the status returned by the
		 * firmware so that user can interpret it.
		 */
		if( cmdid == CMDID_INT_CMDS ) { /* internal command */
			cmd->result = status;

			/*
			 * Remove the internal command from the pending list
			 */
			list_del_init(&scb->list);
			scb->state = SCB_FREE;
		}
		else {
			mega_free_scb(adapter, scb);
		}

		/* Add Scsi_Command to end of completed queue */
		list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
	}
}


/*
 * mega_runpendq()
 *
 * Run through the list of completed requests and finish it
 */
static void
mega_rundoneq (adapter_t *adapter)
{
	Scsi_Cmnd *cmd;
	struct list_head *pos;

	list_for_each(pos, &adapter->completed_list) {

		struct scsi_pointer* spos = (struct scsi_pointer *)pos;

		cmd = list_entry(spos, Scsi_Cmnd, SCp);
		cmd->scsi_done(cmd);
	}

	INIT_LIST_HEAD(&adapter->completed_list);
}


/*
 * Free a SCB structure
 * Note: We assume the scsi commands associated with this scb is not free yet.
 */
static void
mega_free_scb(adapter_t *adapter, scb_t *scb)
{
	switch( scb->dma_type ) {

	case MEGA_DMA_TYPE_NONE:
		break;

	case MEGA_SGLIST:
		scsi_dma_unmap(scb->cmd);
		break;
	default:
		break;
	}

	/*
	 * Remove from the pending list
	 */
	list_del_init(&scb->list);

	/* Link the scb back into free list */
	scb->state = SCB_FREE;
	scb->cmd = NULL;

	list_add(&scb->list, &adapter->free_list);
}


static int
__mega_busywait_mbox (adapter_t *adapter)
{
	volatile mbox_t *mbox = adapter->mbox;
	long counter;

	for (counter = 0; counter < 10000; counter++) {
		if (!mbox->m_in.busy)
			return 0;
		udelay(100);
		cond_resched();
	}
	return -1;		/* give up after 1 second */
}

/*
 * Copies data to SGLIST
 * Note: For 64 bit cards, we need a minimum of one SG element for read/write
 */
static int
mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
{
	struct scatterlist *sg;
	Scsi_Cmnd	*cmd;
	int	sgcnt;
	int	idx;

	cmd = scb->cmd;

	/*
	 * Copy Scatter-Gather list info into controller structure.
	 *
	 * The number of sg elements returned must not exceed our limit
	 */
	sgcnt = scsi_dma_map(cmd);

	scb->dma_type = MEGA_SGLIST;

	BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);

	*len = 0;

	if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
		sg = scsi_sglist(cmd);
		scb->dma_h_bulkdata = sg_dma_address(sg);
		*buf = (u32)scb->dma_h_bulkdata;
		*len = sg_dma_len(sg);
		return 0;
	}

	scsi_for_each_sg(cmd, sg, sgcnt, idx) {
		if (adapter->has_64bit_addr) {
			scb->sgl64[idx].address = sg_dma_address(sg);
			*len += scb->sgl64[idx].length = sg_dma_len(sg);
		} else {
			scb->sgl[idx].address = sg_dma_address(sg);
			*len += scb->sgl[idx].length = sg_dma_len(sg);
		}
	}

	/* Reset pointer and length fields */
	*buf = scb->sgl_dma_addr;

	/* Return count of SG requests */
	return sgcnt;
}


/*
 * mega_8_to_40ld()
 *
 * takes all info in AdapterInquiry structure and puts it into ProductInfo and
 * Enquiry3 structures for later use
 */
static void
mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
		mega_product_info *product_info)
{
	int i;

	product_info->max_commands = inquiry->adapter_info.max_commands;
	enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
	product_info->nchannels = inquiry->adapter_info.nchannels;

	for (i = 0; i < 4; i++) {
		product_info->fw_version[i] =
			inquiry->adapter_info.fw_version[i];

		product_info->bios_version[i] =
			inquiry->adapter_info.bios_version[i];
	}
	enquiry3->cache_flush_interval =
		inquiry->adapter_info.cache_flush_interval;

	product_info->dram_size = inquiry->adapter_info.dram_size;

	enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;

	for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
		enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
		enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
		enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
	}

	for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
		enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
}

static inline void
mega_free_sgl(adapter_t *adapter)
{
	scb_t	*scb;
	int	i;

	for(i = 0; i < adapter->max_cmds; i++) {

		scb = &adapter->scb_list[i];

		if( scb->sgl64 ) {
			pci_free_consistent(adapter->dev,
				sizeof(mega_sgl64) * adapter->sglen,
				scb->sgl64,
				scb->sgl_dma_addr);

			scb->sgl64 = NULL;
		}

		if( scb->pthru ) {
			pci_free_consistent(adapter->dev, sizeof(mega_passthru),
				scb->pthru, scb->pthru_dma_addr);

			scb->pthru = NULL;
		}

		if( scb->epthru ) {
			pci_free_consistent(adapter->dev,
				sizeof(mega_ext_passthru),
				scb->epthru, scb->epthru_dma_addr);

			scb->epthru = NULL;
		}

	}
}


/*
 * Get information about the card/driver
 */
const char *
megaraid_info(struct Scsi_Host *host)
{
	static char buffer[512];
	adapter_t *adapter;

	adapter = (adapter_t *)host->hostdata;

	sprintf (buffer,
		 "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
		 adapter->fw_version, adapter->product_info.max_commands,
		 adapter->host->max_id, adapter->host->max_channel,
		 adapter->host->max_lun);
	return buffer;
}

/*
 * Abort a previous SCSI request. Only commands on the pending list can be
 * aborted. All the commands issued to the F/W must complete.
 */
static int
megaraid_abort(Scsi_Cmnd *cmd)
{
	adapter_t	*adapter;
	int		rval;

	adapter = (adapter_t *)cmd->device->host->hostdata;

	rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);

	/*
	 * This is required here to complete any completed requests
	 * to be communicated over to the mid layer.
	 */
	mega_rundoneq(adapter);

	return rval;
}


static int
megaraid_reset(struct scsi_cmnd *cmd)
{
	adapter_t	*adapter;
	megacmd_t	mc;
	int		rval;

	adapter = (adapter_t *)cmd->device->host->hostdata;

#if MEGA_HAVE_CLUSTERING
	mc.cmd = MEGA_CLUSTER_CMD;
	mc.opcode = MEGA_RESET_RESERVATIONS;

	if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
		printk(KERN_WARNING
				"megaraid: reservation reset failed.\n");
	}
	else {
		printk(KERN_INFO "megaraid: reservation reset.\n");
	}
#endif

	spin_lock_irq(&adapter->lock);

	rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);

	/*
	 * This is required here to complete any completed requests
	 * to be communicated over to the mid layer.
	 */
	mega_rundoneq(adapter);
	spin_unlock_irq(&adapter->lock);

	return rval;
}

/**
 * megaraid_abort_and_reset()
 * @adapter - megaraid soft state
 * @cmd - scsi command to be aborted or reset
 * @aor - abort or reset flag
 *
 * Try to locate the scsi command in the pending queue. If found and is not
 * issued to the controller, abort/reset it. Otherwise return failure
 */
static int
megaraid_abort_and_reset(adapter_t *adapter, Scsi_Cmnd *cmd, int aor)
{
	struct list_head	*pos, *next;
	scb_t			*scb;

	printk(KERN_WARNING "megaraid: %s cmd=%x <c=%d t=%d l=%d>\n",
	     (aor == SCB_ABORT)? "ABORTING":"RESET",
	     cmd->cmnd[0], cmd->device->channel, 
	     cmd->device->id, cmd->device->lun);

	if(list_empty(&adapter->pending_list))
		return FALSE;

	list_for_each_safe(pos, next, &adapter->pending_list) {

		scb = list_entry(pos, scb_t, list);

		if (scb->cmd == cmd) { /* Found command */

			scb->state |= aor;

			/*
			 * Check if this command has firmware ownership. If
			 * yes, we cannot reset this command. Whenever f/w
			 * completes this command, we will return appropriate
			 * status from ISR.
			 */
			if( scb->state & SCB_ISSUED ) {

				printk(KERN_WARNING
					"megaraid: %s[%x], fw owner.\n",
					(aor==SCB_ABORT) ? "ABORTING":"RESET",
					scb->idx);

				return FALSE;
			}
			else {

				/*
				 * Not yet issued! Remove from the pending
				 * list
				 */
				printk(KERN_WARNING
					"megaraid: %s-[%x], driver owner.\n",
					(aor==SCB_ABORT) ? "ABORTING":"RESET",
					scb->idx);

				mega_free_scb(adapter, scb);

				if( aor == SCB_ABORT ) {
					cmd->result = (DID_ABORT << 16);
				}
				else {
					cmd->result = (DID_RESET << 16);
				}

				list_add_tail(SCSI_LIST(cmd),
						&adapter->completed_list);

				return TRUE;
			}
		}
	}

	return FALSE;
}

static inline int
make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
{
	*pdev = alloc_pci_dev();

	if( *pdev == NULL ) return -1;

	memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));

	if( pci_set_dma_mask(*pdev, DMA_BIT_MASK(32)) != 0 ) {
		kfree(*pdev);
		return -1;
	}

	return 0;
}

static inline void
free_local_pdev(struct pci_dev *pdev)
{
	kfree(pdev);
}

/**
 * mega_allocate_inquiry()
 * @dma_handle - handle returned for dma address
 * @pdev - handle to pci device
 *
 * allocates memory for inquiry structure
 */
static inline void *
mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
{
	return pci_alloc_consistent(pdev, sizeof(mega_inquiry3), dma_handle);
}


static inline void
mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
{
	pci_free_consistent(pdev, sizeof(mega_inquiry3), inquiry, dma_handle);
}


#ifdef CONFIG_PROC_FS
/* Following code handles /proc fs  */

#define CREATE_READ_PROC(string, func)	create_proc_read_entry(string,	\
					S_IRUSR | S_IFREG,		\
					controller_proc_dir_entry,	\
					func, adapter)

/**
 * mega_create_proc_entry()
 * @index - index in soft state array
 * @parent - parent node for this /proc entry
 *
 * Creates /proc entries for our controllers.
 */
static void
mega_create_proc_entry(int index, struct proc_dir_entry *parent)
{
	struct proc_dir_entry	*controller_proc_dir_entry = NULL;
	u8		string[64] = { 0 };
	adapter_t	*adapter = hba_soft_state[index];

	sprintf(string, "hba%d", adapter->host->host_no);

	controller_proc_dir_entry =
		adapter->controller_proc_dir_entry = proc_mkdir(string, parent);

	if(!controller_proc_dir_entry) {
		printk(KERN_WARNING "\nmegaraid: proc_mkdir failed\n");
		return;
	}
	adapter->proc_read = CREATE_READ_PROC("config", proc_read_config);
	adapter->proc_stat = CREATE_READ_PROC("stat", proc_read_stat);
	adapter->proc_mbox = CREATE_READ_PROC("mailbox", proc_read_mbox);
#if MEGA_HAVE_ENH_PROC
	adapter->proc_rr = CREATE_READ_PROC("rebuild-rate", proc_rebuild_rate);
	adapter->proc_battery = CREATE_READ_PROC("battery-status",
			proc_battery);

	/*
	 * Display each physical drive on its channel
	 */
	adapter->proc_pdrvstat[0] = CREATE_READ_PROC("diskdrives-ch0",
					proc_pdrv_ch0);
	adapter->proc_pdrvstat[1] = CREATE_READ_PROC("diskdrives-ch1",
					proc_pdrv_ch1);
	adapter->proc_pdrvstat[2] = CREATE_READ_PROC("diskdrives-ch2",
					proc_pdrv_ch2);
	adapter->proc_pdrvstat[3] = CREATE_READ_PROC("diskdrives-ch3",
					proc_pdrv_ch3);

	/*
	 * Display a set of up to 10 logical drive through each of following
	 * /proc entries
	 */
	adapter->proc_rdrvstat[0] = CREATE_READ_PROC("raiddrives-0-9",
					proc_rdrv_10);
	adapter->proc_rdrvstat[1] = CREATE_READ_PROC("raiddrives-10-19",
					proc_rdrv_20);
	adapter->proc_rdrvstat[2] = CREATE_READ_PROC("raiddrives-20-29",
					proc_rdrv_30);
	adapter->proc_rdrvstat[3] = CREATE_READ_PROC("raiddrives-30-39",
					proc_rdrv_40);
#endif
}


/**
 * proc_read_config()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display configuration information about the controller.
 */
static int
proc_read_config(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{

	adapter_t *adapter = (adapter_t *)data;
	int len = 0;

	len += sprintf(page+len, "%s", MEGARAID_VERSION);

	if(adapter->product_info.product_name[0])
		len += sprintf(page+len, "%s\n",
				adapter->product_info.product_name);

	len += sprintf(page+len, "Controller Type: ");

	if( adapter->flag & BOARD_MEMMAP ) {
		len += sprintf(page+len,
			"438/466/467/471/493/518/520/531/532\n");
	}
	else {
		len += sprintf(page+len,
			"418/428/434\n");
	}

	if(adapter->flag & BOARD_40LD) {
		len += sprintf(page+len,
				"Controller Supports 40 Logical Drives\n");
	}

	if(adapter->flag & BOARD_64BIT) {
		len += sprintf(page+len,
		"Controller capable of 64-bit memory addressing\n");
	}
	if( adapter->has_64bit_addr ) {
		len += sprintf(page+len,
			"Controller using 64-bit memory addressing\n");
	}
	else {
		len += sprintf(page+len,
			"Controller is not using 64-bit memory addressing\n");
	}

	len += sprintf(page+len, "Base = %08lx, Irq = %d, ", adapter->base,
			adapter->host->irq);

	len += sprintf(page+len, "Logical Drives = %d, Channels = %d\n",
			adapter->numldrv, adapter->product_info.nchannels);

	len += sprintf(page+len, "Version =%s:%s, DRAM = %dMb\n",
			adapter->fw_version, adapter->bios_version,
			adapter->product_info.dram_size);

	len += sprintf(page+len,
		"Controller Queue Depth = %d, Driver Queue Depth = %d\n",
		adapter->product_info.max_commands, adapter->max_cmds);

	len += sprintf(page+len, "support_ext_cdb    = %d\n",
			adapter->support_ext_cdb);
	len += sprintf(page+len, "support_random_del = %d\n",
			adapter->support_random_del);
	len += sprintf(page+len, "boot_ldrv_enabled  = %d\n",
			adapter->boot_ldrv_enabled);
	len += sprintf(page+len, "boot_ldrv          = %d\n",
			adapter->boot_ldrv);
	len += sprintf(page+len, "boot_pdrv_enabled  = %d\n",
			adapter->boot_pdrv_enabled);
	len += sprintf(page+len, "boot_pdrv_ch       = %d\n",
			adapter->boot_pdrv_ch);
	len += sprintf(page+len, "boot_pdrv_tgt      = %d\n",
			adapter->boot_pdrv_tgt);
	len += sprintf(page+len, "quiescent          = %d\n",
			atomic_read(&adapter->quiescent));
	len += sprintf(page+len, "has_cluster        = %d\n",
			adapter->has_cluster);

	len += sprintf(page+len, "\nModule Parameters:\n");
	len += sprintf(page+len, "max_cmd_per_lun    = %d\n",
			max_cmd_per_lun);
	len += sprintf(page+len, "max_sectors_per_io = %d\n",
			max_sectors_per_io);

	*eof = 1;

	return len;
}



/**
 * proc_read_stat()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Diaplay statistical information about the I/O activity.
 */
static int
proc_read_stat(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t	*adapter;
	int	len;
	int	i;

	i = 0;	/* avoid compilation warnings */
	len = 0;
	adapter = (adapter_t *)data;

	len = sprintf(page, "Statistical Information for this controller\n");
	len += sprintf(page+len, "pend_cmds = %d\n",
			atomic_read(&adapter->pend_cmds));
#if MEGA_HAVE_STATS
	for(i = 0; i < adapter->numldrv; i++) {
		len += sprintf(page+len, "Logical Drive %d:\n", i);

		len += sprintf(page+len,
			"\tReads Issued = %lu, Writes Issued = %lu\n",
			adapter->nreads[i], adapter->nwrites[i]);

		len += sprintf(page+len,
			"\tSectors Read = %lu, Sectors Written = %lu\n",
			adapter->nreadblocks[i], adapter->nwriteblocks[i]);

		len += sprintf(page+len,
			"\tRead errors = %lu, Write errors = %lu\n\n",
			adapter->rd_errors[i], adapter->wr_errors[i]);
	}
#else
	len += sprintf(page+len,
			"IO and error counters not compiled in driver.\n");
#endif

	*eof = 1;

	return len;
}


/**
 * proc_read_mbox()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display mailbox information for the last command issued. This information
 * is good for debugging.
 */
static int
proc_read_mbox(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{

	adapter_t	*adapter = (adapter_t *)data;
	volatile mbox_t	*mbox = adapter->mbox;
	int	len = 0;

	len = sprintf(page, "Contents of Mail Box Structure\n");
	len += sprintf(page+len, "  Fw Command   = 0x%02x\n", 
			mbox->m_out.cmd);
	len += sprintf(page+len, "  Cmd Sequence = 0x%02x\n", 
			mbox->m_out.cmdid);
	len += sprintf(page+len, "  No of Sectors= %04d\n", 
			mbox->m_out.numsectors);
	len += sprintf(page+len, "  LBA          = 0x%02x\n", 
			mbox->m_out.lba);
	len += sprintf(page+len, "  DTA          = 0x%08x\n", 
			mbox->m_out.xferaddr);
	len += sprintf(page+len, "  Logical Drive= 0x%02x\n", 
			mbox->m_out.logdrv);
	len += sprintf(page+len, "  No of SG Elmt= 0x%02x\n",
			mbox->m_out.numsgelements);
	len += sprintf(page+len, "  Busy         = %01x\n", 
			mbox->m_in.busy);
	len += sprintf(page+len, "  Status       = 0x%02x\n", 
			mbox->m_in.status);

	*eof = 1;

	return len;
}


/**
 * proc_rebuild_rate()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display current rebuild rate
 */
static int
proc_rebuild_rate(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t	*adapter = (adapter_t *)data;
	dma_addr_t	dma_handle;
	caddr_t		inquiry;
	struct pci_dev	*pdev;
	int	len = 0;

	if( make_local_pdev(adapter, &pdev) != 0 ) {
		*eof = 1;
		return len;
	}

	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
		free_local_pdev(pdev);
		*eof = 1;
		return len;
	}

	if( mega_adapinq(adapter, dma_handle) != 0 ) {

		len = sprintf(page, "Adapter inquiry failed.\n");

		printk(KERN_WARNING "megaraid: inquiry failed.\n");

		mega_free_inquiry(inquiry, dma_handle, pdev);

		free_local_pdev(pdev);

		*eof = 1;

		return len;
	}

	if( adapter->flag & BOARD_40LD ) {
		len = sprintf(page, "Rebuild Rate: [%d%%]\n",
			((mega_inquiry3 *)inquiry)->rebuild_rate);
	}
	else {
		len = sprintf(page, "Rebuild Rate: [%d%%]\n",
			((mraid_ext_inquiry *)
			inquiry)->raid_inq.adapter_info.rebuild_rate);
	}


	mega_free_inquiry(inquiry, dma_handle, pdev);

	free_local_pdev(pdev);

	*eof = 1;

	return len;
}


/**
 * proc_battery()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display information about the battery module on the controller.
 */
static int
proc_battery(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t	*adapter = (adapter_t *)data;
	dma_addr_t	dma_handle;
	caddr_t		inquiry;
	struct pci_dev	*pdev;
	u8	battery_status = 0;
	char	str[256];
	int	len = 0;

	if( make_local_pdev(adapter, &pdev) != 0 ) {
		*eof = 1;
		return len;
	}

	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
		free_local_pdev(pdev);
		*eof = 1;
		return len;
	}

	if( mega_adapinq(adapter, dma_handle) != 0 ) {

		len = sprintf(page, "Adapter inquiry failed.\n");

		printk(KERN_WARNING "megaraid: inquiry failed.\n");

		mega_free_inquiry(inquiry, dma_handle, pdev);

		free_local_pdev(pdev);

		*eof = 1;

		return len;
	}

	if( adapter->flag & BOARD_40LD ) {
		battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
	}
	else {
		battery_status = ((mraid_ext_inquiry *)inquiry)->
			raid_inq.adapter_info.battery_status;
	}

	/*
	 * Decode the battery status
	 */
	sprintf(str, "Battery Status:[%d]", battery_status);

	if(battery_status == MEGA_BATT_CHARGE_DONE)
		strcat(str, " Charge Done");

	if(battery_status & MEGA_BATT_MODULE_MISSING)
		strcat(str, " Module Missing");
	
	if(battery_status & MEGA_BATT_LOW_VOLTAGE)
		strcat(str, " Low Voltage");
	
	if(battery_status & MEGA_BATT_TEMP_HIGH)
		strcat(str, " Temperature High");
	
	if(battery_status & MEGA_BATT_PACK_MISSING)
		strcat(str, " Pack Missing");
	
	if(battery_status & MEGA_BATT_CHARGE_INPROG)
		strcat(str, " Charge In-progress");
	
	if(battery_status & MEGA_BATT_CHARGE_FAIL)
		strcat(str, " Charge Fail");
	
	if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
		strcat(str, " Cycles Exceeded");

	len = sprintf(page, "%s\n", str);


	mega_free_inquiry(inquiry, dma_handle, pdev);

	free_local_pdev(pdev);

	*eof = 1;

	return len;
}


/**
 * proc_pdrv_ch0()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display information about the physical drives on physical channel 0.
 */
static int
proc_pdrv_ch0(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t *adapter = (adapter_t *)data;

	*eof = 1;

	return (proc_pdrv(adapter, page, 0));
}


/**
 * proc_pdrv_ch1()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display information about the physical drives on physical channel 1.
 */
static int
proc_pdrv_ch1(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t *adapter = (adapter_t *)data;

	*eof = 1;

	return (proc_pdrv(adapter, page, 1));
}


/**
 * proc_pdrv_ch2()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display information about the physical drives on physical channel 2.
 */
static int
proc_pdrv_ch2(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t *adapter = (adapter_t *)data;

	*eof = 1;

	return (proc_pdrv(adapter, page, 2));
}


/**
 * proc_pdrv_ch3()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display information about the physical drives on physical channel 3.
 */
static int
proc_pdrv_ch3(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t *adapter = (adapter_t *)data;

	*eof = 1;

	return (proc_pdrv(adapter, page, 3));
}


/**
 * proc_pdrv()
 * @page - buffer to write the data in
 * @adapter - pointer to our soft state
 *
 * Display information about the physical drives.
 */
static int
proc_pdrv(adapter_t *adapter, char *page, int channel)
{
	dma_addr_t	dma_handle;
	char		*scsi_inq;
	dma_addr_t	scsi_inq_dma_handle;
	caddr_t		inquiry;
	struct pci_dev	*pdev;
	u8	*pdrv_state;
	u8	state;
	int	tgt;
	int	max_channels;
	int	len = 0;
	char	str[80];
	int	i;

	if( make_local_pdev(adapter, &pdev) != 0 ) {
		return len;
	}

	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
		goto free_pdev;
	}

	if( mega_adapinq(adapter, dma_handle) != 0 ) {
		len = sprintf(page, "Adapter inquiry failed.\n");

		printk(KERN_WARNING "megaraid: inquiry failed.\n");

		goto free_inquiry;
	}


	scsi_inq = pci_alloc_consistent(pdev, 256, &scsi_inq_dma_handle);

	if( scsi_inq == NULL ) {
		len = sprintf(page, "memory not available for scsi inq.\n");

		goto free_inquiry;
	}

	if( adapter->flag & BOARD_40LD ) {
		pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
	}
	else {
		pdrv_state = ((mraid_ext_inquiry *)inquiry)->
			raid_inq.pdrv_info.pdrv_state;
	}

	max_channels = adapter->product_info.nchannels;

	if( channel >= max_channels ) {
		goto free_pci;
	}

	for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {

		i = channel*16 + tgt;

		state = *(pdrv_state + i);

		switch( state & 0x0F ) {

		case PDRV_ONLINE:
			sprintf(str,
			"Channel:%2d Id:%2d State: Online",
				channel, tgt);
			break;

		case PDRV_FAILED:
			sprintf(str,
			"Channel:%2d Id:%2d State: Failed",
				channel, tgt);
			break;

		case PDRV_RBLD:
			sprintf(str,
			"Channel:%2d Id:%2d State: Rebuild",
				channel, tgt);
			break;

		case PDRV_HOTSPARE:
			sprintf(str,
			"Channel:%2d Id:%2d State: Hot spare",
				channel, tgt);
			break;

		default:
			sprintf(str,
			"Channel:%2d Id:%2d State: Un-configured",
				channel, tgt);
			break;

		}

		/*
		 * This interface displays inquiries for disk drives
		 * only. Inquries for logical drives and non-disk
		 * devices are available through /proc/scsi/scsi
		 */
		memset(scsi_inq, 0, 256);
		if( mega_internal_dev_inquiry(adapter, channel, tgt,
				scsi_inq_dma_handle) ||
				(scsi_inq[0] & 0x1F) != TYPE_DISK ) {
			continue;
		}

		/*
		 * Check for overflow. We print less than 240
		 * characters for inquiry
		 */
		if( (len + 240) >= PAGE_SIZE ) break;

		len += sprintf(page+len, "%s.\n", str);

		len += mega_print_inquiry(page+len, scsi_inq);
	}

free_pci:
	pci_free_consistent(pdev, 256, scsi_inq, scsi_inq_dma_handle);
free_inquiry:
	mega_free_inquiry(inquiry, dma_handle, pdev);
free_pdev:
	free_local_pdev(pdev);

	return len;
}


/*
 * Display scsi inquiry
 */
static int
mega_print_inquiry(char *page, char *scsi_inq)
{
	int	len = 0;
	int	i;

	len = sprintf(page, "  Vendor: ");
	for( i = 8; i < 16; i++ ) {
		len += sprintf(page+len, "%c", scsi_inq[i]);
	}

	len += sprintf(page+len, "  Model: ");

	for( i = 16; i < 32; i++ ) {
		len += sprintf(page+len, "%c", scsi_inq[i]);
	}

	len += sprintf(page+len, "  Rev: ");

	for( i = 32; i < 36; i++ ) {
		len += sprintf(page+len, "%c", scsi_inq[i]);
	}

	len += sprintf(page+len, "\n");

	i = scsi_inq[0] & 0x1f;

	len += sprintf(page+len, "  Type:   %s ", scsi_device_type(i));

	len += sprintf(page+len,
	"                 ANSI SCSI revision: %02x", scsi_inq[2] & 0x07);

	if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
		len += sprintf(page+len, " CCS\n");
	else
		len += sprintf(page+len, "\n");

	return len;
}


/**
 * proc_rdrv_10()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display real time information about the logical drives 0 through 9.
 */
static int
proc_rdrv_10(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t *adapter = (adapter_t *)data;

	*eof = 1;

	return (proc_rdrv(adapter, page, 0, 9));
}


/**
 * proc_rdrv_20()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display real time information about the logical drives 0 through 9.
 */
static int
proc_rdrv_20(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t *adapter = (adapter_t *)data;

	*eof = 1;

	return (proc_rdrv(adapter, page, 10, 19));
}


/**
 * proc_rdrv_30()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display real time information about the logical drives 0 through 9.
 */
static int
proc_rdrv_30(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t *adapter = (adapter_t *)data;

	*eof = 1;

	return (proc_rdrv(adapter, page, 20, 29));
}


/**
 * proc_rdrv_40()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display real time information about the logical drives 0 through 9.
 */
static int
proc_rdrv_40(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t *adapter = (adapter_t *)data;

	*eof = 1;

	return (proc_rdrv(adapter, page, 30, 39));
}


/**
 * proc_rdrv()
 * @page - buffer to write the data in
 * @adapter - pointer to our soft state
 * @start - starting logical drive to display
 * @end - ending logical drive to display
 *
 * We do not print the inquiry information since its already available through
 * /proc/scsi/scsi interface
 */
static int
proc_rdrv(adapter_t *adapter, char *page, int start, int end )
{
	dma_addr_t	dma_handle;
	logdrv_param	*lparam;
	megacmd_t	mc;
	char		*disk_array;
	dma_addr_t	disk_array_dma_handle;
	caddr_t		inquiry;
	struct pci_dev	*pdev;
	u8	*rdrv_state;
	int	num_ldrv;
	u32	array_sz;
	int	len = 0;
	int	i;

	if( make_local_pdev(adapter, &pdev) != 0 ) {
		return len;
	}

	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
		free_local_pdev(pdev);
		return len;
	}

	if( mega_adapinq(adapter, dma_handle) != 0 ) {

		len = sprintf(page, "Adapter inquiry failed.\n");

		printk(KERN_WARNING "megaraid: inquiry failed.\n");

		mega_free_inquiry(inquiry, dma_handle, pdev);

		free_local_pdev(pdev);

		return len;
	}

	memset(&mc, 0, sizeof(megacmd_t));

	if( adapter->flag & BOARD_40LD ) {
		array_sz = sizeof(disk_array_40ld);

		rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;

		num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
	}
	else {
		array_sz = sizeof(disk_array_8ld);

		rdrv_state = ((mraid_ext_inquiry *)inquiry)->
			raid_inq.logdrv_info.ldrv_state;

		num_ldrv = ((mraid_ext_inquiry *)inquiry)->
			raid_inq.logdrv_info.num_ldrv;
	}

	disk_array = pci_alloc_consistent(pdev, array_sz,
			&disk_array_dma_handle);

	if( disk_array == NULL ) {
		len = sprintf(page, "memory not available.\n");

		mega_free_inquiry(inquiry, dma_handle, pdev);

		free_local_pdev(pdev);

		return len;
	}

	mc.xferaddr = (u32)disk_array_dma_handle;

	if( adapter->flag & BOARD_40LD ) {
		mc.cmd = FC_NEW_CONFIG;
		mc.opcode = OP_DCMD_READ_CONFIG;

		if( mega_internal_command(adapter, &mc, NULL) ) {

			len = sprintf(page, "40LD read config failed.\n");

			mega_free_inquiry(inquiry, dma_handle, pdev);

			pci_free_consistent(pdev, array_sz, disk_array,
					disk_array_dma_handle);

			free_local_pdev(pdev);

			return len;
		}

	}
	else {
		mc.cmd = NEW_READ_CONFIG_8LD;

		if( mega_internal_command(adapter, &mc, NULL) ) {

			mc.cmd = READ_CONFIG_8LD;

			if( mega_internal_command(adapter, &mc,
						NULL) ){

				len = sprintf(page,
					"8LD read config failed.\n");

				mega_free_inquiry(inquiry, dma_handle, pdev);

				pci_free_consistent(pdev, array_sz,
						disk_array,
						disk_array_dma_handle);

				free_local_pdev(pdev);

				return len;
			}
		}
	}

	for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {

		if( adapter->flag & BOARD_40LD ) {
			lparam =
			&((disk_array_40ld *)disk_array)->ldrv[i].lparam;
		}
		else {
			lparam =
			&((disk_array_8ld *)disk_array)->ldrv[i].lparam;
		}

		/*
		 * Check for overflow. We print less than 240 characters for
		 * information about each logical drive.
		 */
		if( (len + 240) >= PAGE_SIZE ) break;

		len += sprintf(page+len, "Logical drive:%2d:, ", i);

		switch( rdrv_state[i] & 0x0F ) {
		case RDRV_OFFLINE:
			len += sprintf(page+len, "state: offline");
			break;

		case RDRV_DEGRADED:
			len += sprintf(page+len, "state: degraded");
			break;

		case RDRV_OPTIMAL:
			len += sprintf(page+len, "state: optimal");
			break;

		case RDRV_DELETED:
			len += sprintf(page+len, "state: deleted");
			break;

		default:
			len += sprintf(page+len, "state: unknown");
			break;
		}

		/*
		 * Check if check consistency or initialization is going on
		 * for this logical drive.
		 */
		if( (rdrv_state[i] & 0xF0) == 0x20 ) {
			len += sprintf(page+len,
					", check-consistency in progress");
		}
		else if( (rdrv_state[i] & 0xF0) == 0x10 ) {
			len += sprintf(page+len,
					", initialization in progress");
		}
		
		len += sprintf(page+len, "\n");

		len += sprintf(page+len, "Span depth:%3d, ",
				lparam->span_depth);

		len += sprintf(page+len, "RAID level:%3d, ",
				lparam->level);

		len += sprintf(page+len, "Stripe size:%3d, ",
				lparam->stripe_sz ? lparam->stripe_sz/2: 128);

		len += sprintf(page+len, "Row size:%3d\n",
				lparam->row_size);


		len += sprintf(page+len, "Read Policy: ");

		switch(lparam->read_ahead) {

		case NO_READ_AHEAD:
			len += sprintf(page+len, "No read ahead, ");
			break;

		case READ_AHEAD:
			len += sprintf(page+len, "Read ahead, ");
			break;

		case ADAP_READ_AHEAD:
			len += sprintf(page+len, "Adaptive, ");
			break;

		}

		len += sprintf(page+len, "Write Policy: ");

		switch(lparam->write_mode) {

		case WRMODE_WRITE_THRU:
			len += sprintf(page+len, "Write thru, ");
			break;

		case WRMODE_WRITE_BACK:
			len += sprintf(page+len, "Write back, ");
			break;
		}

		len += sprintf(page+len, "Cache Policy: ");

		switch(lparam->direct_io) {

		case CACHED_IO:
			len += sprintf(page+len, "Cached IO\n\n");
			break;

		case DIRECT_IO:
			len += sprintf(page+len, "Direct IO\n\n");
			break;
		}
	}

	mega_free_inquiry(inquiry, dma_handle, pdev);

	pci_free_consistent(pdev, array_sz, disk_array,
			disk_array_dma_handle);

	free_local_pdev(pdev);

	return len;
}
#else
static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
{
}
#endif


/**
 * megaraid_biosparam()
 *
 * Return the disk geometry for a particular disk
 */
static int
megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
		    sector_t capacity, int geom[])
{
	adapter_t	*adapter;
	unsigned char	*bh;
	int	heads;
	int	sectors;
	int	cylinders;
	int	rval;

	/* Get pointer to host config structure */
	adapter = (adapter_t *)sdev->host->hostdata;

	if (IS_RAID_CH(adapter, sdev->channel)) {
			/* Default heads (64) & sectors (32) */
			heads = 64;
			sectors = 32;
			cylinders = (ulong)capacity / (heads * sectors);

			/*
			 * Handle extended translation size for logical drives
			 * > 1Gb
			 */
			if ((ulong)capacity >= 0x200000) {
				heads = 255;
				sectors = 63;
				cylinders = (ulong)capacity / (heads * sectors);
			}

			/* return result */
			geom[0] = heads;
			geom[1] = sectors;
			geom[2] = cylinders;
	}
	else {
		bh = scsi_bios_ptable(bdev);

		if( bh ) {
			rval = scsi_partsize(bh, capacity,
					    &geom[2], &geom[0], &geom[1]);
			kfree(bh);
			if( rval != -1 )
				return rval;
		}

		printk(KERN_INFO
		"megaraid: invalid partition on this disk on channel %d\n",
				sdev->channel);

		/* Default heads (64) & sectors (32) */
		heads = 64;
		sectors = 32;
		cylinders = (ulong)capacity / (heads * sectors);

		/* Handle extended translation size for logical drives > 1Gb */
		if ((ulong)capacity >= 0x200000) {
			heads = 255;
			sectors = 63;
			cylinders = (ulong)capacity / (heads * sectors);
		}

		/* return result */
		geom[0] = heads;
		geom[1] = sectors;
		geom[2] = cylinders;
	}

	return 0;
}

/**
 * mega_init_scb()
 * @adapter - pointer to our soft state
 *
 * Allocate memory for the various pointers in the scb structures:
 * scatter-gather list pointer, passthru and extended passthru structure
 * pointers.
 */
static int
mega_init_scb(adapter_t *adapter)
{
	scb_t	*scb;
	int	i;

	for( i = 0; i < adapter->max_cmds; i++ ) {

		scb = &adapter->scb_list[i];

		scb->sgl64 = NULL;
		scb->sgl = NULL;
		scb->pthru = NULL;
		scb->epthru = NULL;
	}

	for( i = 0; i < adapter->max_cmds; i++ ) {

		scb = &adapter->scb_list[i];

		scb->idx = i;

		scb->sgl64 = pci_alloc_consistent(adapter->dev,
				sizeof(mega_sgl64) * adapter->sglen,
				&scb->sgl_dma_addr);

		scb->sgl = (mega_sglist *)scb->sgl64;

		if( !scb->sgl ) {
			printk(KERN_WARNING "RAID: Can't allocate sglist.\n");
			mega_free_sgl(adapter);
			return -1;
		}

		scb->pthru = pci_alloc_consistent(adapter->dev,
				sizeof(mega_passthru),
				&scb->pthru_dma_addr);

		if( !scb->pthru ) {
			printk(KERN_WARNING "RAID: Can't allocate passthru.\n");
			mega_free_sgl(adapter);
			return -1;
		}

		scb->epthru = pci_alloc_consistent(adapter->dev,
				sizeof(mega_ext_passthru),
				&scb->epthru_dma_addr);

		if( !scb->epthru ) {
			printk(KERN_WARNING
				"Can't allocate extended passthru.\n");
			mega_free_sgl(adapter);
			return -1;
		}


		scb->dma_type = MEGA_DMA_TYPE_NONE;

		/*
		 * Link to free list
		 * lock not required since we are loading the driver, so no
		 * commands possible right now.
		 */
		scb->state = SCB_FREE;
		scb->cmd = NULL;
		list_add(&scb->list, &adapter->free_list);
	}

	return 0;
}


/**
 * megadev_open()
 * @inode - unused
 * @filep - unused
 *
 * Routines for the character/ioctl interface to the driver. Find out if this
 * is a valid open. 
 */
static int
megadev_open (struct inode *inode, struct file *filep)
{
	/*
	 * Only allow superuser to access private ioctl interface
	 */
	if( !capable(CAP_SYS_ADMIN) ) return -EACCES;

	return 0;
}


/**
 * megadev_ioctl()
 * @inode - Our device inode
 * @filep - unused
 * @cmd - ioctl command
 * @arg - user buffer
 *
 * ioctl entry point for our private ioctl interface. We move the data in from
 * the user space, prepare the command (if necessary, convert the old MIMD
 * ioctl to new ioctl command), and issue a synchronous command to the
 * controller.
 */
static int
megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
{
	adapter_t	*adapter;
	nitioctl_t	uioc;
	int		adapno;
	int		rval;
	mega_passthru	__user *upthru;	/* user address for passthru */
	mega_passthru	*pthru;		/* copy user passthru here */
	dma_addr_t	pthru_dma_hndl;
	void		*data = NULL;	/* data to be transferred */
	dma_addr_t	data_dma_hndl;	/* dma handle for data xfer area */
	megacmd_t	mc;
	megastat_t	__user *ustats;
	int		num_ldrv;
	u32		uxferaddr = 0;
	struct pci_dev	*pdev;

	ustats = NULL; /* avoid compilation warnings */
	num_ldrv = 0;

	/*
	 * Make sure only USCSICMD are issued through this interface.
	 * MIMD application would still fire different command.
	 */
	if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
		return -EINVAL;
	}

	/*
	 * Check and convert a possible MIMD command to NIT command.
	 * mega_m_to_n() copies the data from the user space, so we do not
	 * have to do it here.
	 * NOTE: We will need some user address to copyout the data, therefore
	 * the inteface layer will also provide us with the required user
	 * addresses.
	 */
	memset(&uioc, 0, sizeof(nitioctl_t));
	if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
		return rval;


	switch( uioc.opcode ) {

	case GET_DRIVER_VER:
		if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
			return (-EFAULT);

		break;

	case GET_N_ADAP:
		if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
			return (-EFAULT);

		/*
		 * Shucks. MIMD interface returns a positive value for number
		 * of adapters. TODO: Change it to return 0 when there is no
		 * applicatio using mimd interface.
		 */
		return hba_count;

	case GET_ADAP_INFO:

		/*
		 * Which adapter
		 */
		if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
			return (-ENODEV);

		if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
				sizeof(struct mcontroller)) )
			return (-EFAULT);
		break;

#if MEGA_HAVE_STATS

	case GET_STATS:
		/*
		 * Which adapter
		 */
		if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
			return (-ENODEV);

		adapter = hba_soft_state[adapno];

		ustats = uioc.uioc_uaddr;

		if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
			return (-EFAULT);

		/*
		 * Check for the validity of the logical drive number
		 */
		if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;

		if( copy_to_user(ustats->nreads, adapter->nreads,
					num_ldrv*sizeof(u32)) )
			return -EFAULT;

		if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
					num_ldrv*sizeof(u32)) )
			return -EFAULT;

		if( copy_to_user(ustats->nwrites, adapter->nwrites,
					num_ldrv*sizeof(u32)) )
			return -EFAULT;

		if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
					num_ldrv*sizeof(u32)) )
			return -EFAULT;

		if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
					num_ldrv*sizeof(u32)) )
			return -EFAULT;

		if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
					num_ldrv*sizeof(u32)) )
			return -EFAULT;

		return 0;

#endif
	case MBOX_CMD:

		/*
		 * Which adapter
		 */
		if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
			return (-ENODEV);

		adapter = hba_soft_state[adapno];

		/*
		 * Deletion of logical drive is a special case. The adapter
		 * should be quiescent before this command is issued.
		 */
		if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
				uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {

			/*
			 * Do we support this feature
			 */
			if( !adapter->support_random_del ) {
				printk(KERN_WARNING "megaraid: logdrv ");
				printk("delete on non-supporting F/W.\n");

				return (-EINVAL);
			}

			rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );

			if( rval == 0 ) {
				memset(&mc, 0, sizeof(megacmd_t));

				mc.status = rval;

				rval = mega_n_to_m((void __user *)arg, &mc);
			}

			return rval;
		}
		/*
		 * This interface only support the regular passthru commands.
		 * Reject extended passthru and 64-bit passthru
		 */
		if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
			uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {

			printk(KERN_WARNING "megaraid: rejected passthru.\n");

			return (-EINVAL);
		}

		/*
		 * For all internal commands, the buffer must be allocated in
		 * <4GB address range
		 */
		if( make_local_pdev(adapter, &pdev) != 0 )
			return -EIO;

		/* Is it a passthru command or a DCMD */
		if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
			/* Passthru commands */

			pthru = pci_alloc_consistent(pdev,
					sizeof(mega_passthru),
					&pthru_dma_hndl);

			if( pthru == NULL ) {
				free_local_pdev(pdev);
				return (-ENOMEM);
			}

			/*
			 * The user passthru structure
			 */
			upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr;

			/*
			 * Copy in the user passthru here.
			 */
			if( copy_from_user(pthru, upthru,
						sizeof(mega_passthru)) ) {

				pci_free_consistent(pdev,
						sizeof(mega_passthru), pthru,
						pthru_dma_hndl);

				free_local_pdev(pdev);

				return (-EFAULT);
			}

			/*
			 * Is there a data transfer
			 */
			if( pthru->dataxferlen ) {
				data = pci_alloc_consistent(pdev,
						pthru->dataxferlen,
						&data_dma_hndl);

				if( data == NULL ) {
					pci_free_consistent(pdev,
							sizeof(mega_passthru),
							pthru,
							pthru_dma_hndl);

					free_local_pdev(pdev);

					return (-ENOMEM);
				}

				/*
				 * Save the user address and point the kernel
				 * address at just allocated memory
				 */
				uxferaddr = pthru->dataxferaddr;
				pthru->dataxferaddr = data_dma_hndl;
			}


			/*
			 * Is data coming down-stream
			 */
			if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) {
				/*
				 * Get the user data
				 */
				if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
							pthru->dataxferlen) ) {
					rval = (-EFAULT);
					goto freemem_and_return;
				}
			}

			memset(&mc, 0, sizeof(megacmd_t));

			mc.cmd = MEGA_MBOXCMD_PASSTHRU;
			mc.xferaddr = (u32)pthru_dma_hndl;

			/*
			 * Issue the command
			 */
			mega_internal_command(adapter, &mc, pthru);

			rval = mega_n_to_m((void __user *)arg, &mc);

			if( rval ) goto freemem_and_return;


			/*
			 * Is data going up-stream
			 */
			if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
				if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
							pthru->dataxferlen) ) {
					rval = (-EFAULT);
				}
			}

			/*
			 * Send the request sense data also, irrespective of
			 * whether the user has asked for it or not.
			 */
			if (copy_to_user(upthru->reqsensearea,
					pthru->reqsensearea, 14))
				rval = -EFAULT;

freemem_and_return:
			if( pthru->dataxferlen ) {
				pci_free_consistent(pdev,
						pthru->dataxferlen, data,
						data_dma_hndl);
			}

			pci_free_consistent(pdev, sizeof(mega_passthru),
					pthru, pthru_dma_hndl);

			free_local_pdev(pdev);

			return rval;
		}
		else {
			/* DCMD commands */

			/*
			 * Is there a data transfer
			 */
			if( uioc.xferlen ) {
				data = pci_alloc_consistent(pdev,
						uioc.xferlen, &data_dma_hndl);

				if( data == NULL ) {
					free_local_pdev(pdev);
					return (-ENOMEM);
				}

				uxferaddr = MBOX(uioc)->xferaddr;
			}

			/*
			 * Is data coming down-stream
			 */
			if( uioc.xferlen && (uioc.flags & UIOC_WR) ) {
				/*
				 * Get the user data
				 */
				if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
							uioc.xferlen) ) {

					pci_free_consistent(pdev,
							uioc.xferlen,
							data, data_dma_hndl);

					free_local_pdev(pdev);

					return (-EFAULT);
				}
			}

			memcpy(&mc, MBOX(uioc), sizeof(megacmd_t));

			mc.xferaddr = (u32)data_dma_hndl;

			/*
			 * Issue the command
			 */
			mega_internal_command(adapter, &mc, NULL);

			rval = mega_n_to_m((void __user *)arg, &mc);

			if( rval ) {
				if( uioc.xferlen ) {
					pci_free_consistent(pdev,
							uioc.xferlen, data,
							data_dma_hndl);
				}

				free_local_pdev(pdev);

				return rval;
			}

			/*
			 * Is data going up-stream
			 */
			if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
				if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
							uioc.xferlen) ) {

					rval = (-EFAULT);
				}
			}

			if( uioc.xferlen ) {
				pci_free_consistent(pdev,
						uioc.xferlen, data,
						data_dma_hndl);
			}

			free_local_pdev(pdev);

			return rval;
		}

	default:
		return (-EINVAL);
	}

	return 0;
}

static long
megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
{
	int ret;

	mutex_lock(&megadev_mutex);
	ret = megadev_ioctl(filep, cmd, arg);
	mutex_unlock(&megadev_mutex);

	return ret;
}

/**
 * mega_m_to_n()
 * @arg - user address
 * @uioc - new ioctl structure
 *
 * A thin layer to convert older mimd interface ioctl structure to NIT ioctl
 * structure
 *
 * Converts the older mimd ioctl structure to newer NIT structure
 */
static int
mega_m_to_n(void __user *arg, nitioctl_t *uioc)
{
	struct uioctl_t	uioc_mimd;
	char	signature[8] = {0};
	u8	opcode;
	u8	subopcode;


	/*
	 * check is the application conforms to NIT. We do not have to do much
	 * in that case.
	 * We exploit the fact that the signature is stored in the very
	 * beginning of the structure.
	 */

	if( copy_from_user(signature, arg, 7) )
		return (-EFAULT);

	if( memcmp(signature, "MEGANIT", 7) == 0 ) {

		/*
		 * NOTE NOTE: The nit ioctl is still under flux because of
		 * change of mailbox definition, in HPE. No applications yet
		 * use this interface and let's not have applications use this
		 * interface till the new specifitions are in place.
		 */
		return -EINVAL;
#if 0
		if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
			return (-EFAULT);
		return 0;
#endif
	}

	/*
	 * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
	 *
	 * Get the user ioctl structure
	 */
	if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
		return (-EFAULT);


	/*
	 * Get the opcode and subopcode for the commands
	 */
	opcode = uioc_mimd.ui.fcs.opcode;
	subopcode = uioc_mimd.ui.fcs.subopcode;

	switch (opcode) {
	case 0x82:

		switch (subopcode) {

		case MEGAIOC_QDRVRVER:	/* Query driver version */
			uioc->opcode = GET_DRIVER_VER;
			uioc->uioc_uaddr = uioc_mimd.data;
			break;

		case MEGAIOC_QNADAP:	/* Get # of adapters */
			uioc->opcode = GET_N_ADAP;
			uioc->uioc_uaddr = uioc_mimd.data;
			break;

		case MEGAIOC_QADAPINFO:	/* Get adapter information */
			uioc->opcode = GET_ADAP_INFO;
			uioc->adapno = uioc_mimd.ui.fcs.adapno;
			uioc->uioc_uaddr = uioc_mimd.data;
			break;

		default:
			return(-EINVAL);
		}

		break;


	case 0x81:

		uioc->opcode = MBOX_CMD;
		uioc->adapno = uioc_mimd.ui.fcs.adapno;

		memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);

		uioc->xferlen = uioc_mimd.ui.fcs.length;

		if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
		if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;

		break;

	case 0x80:

		uioc->opcode = MBOX_CMD;
		uioc->adapno = uioc_mimd.ui.fcs.adapno;

		memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);

		/*
		 * Choose the xferlen bigger of input and output data
		 */
		uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
			uioc_mimd.outlen : uioc_mimd.inlen;

		if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
		if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;

		break;

	default:
		return (-EINVAL);

	}

	return 0;
}

/*
 * mega_n_to_m()
 * @arg - user address
 * @mc - mailbox command
 *
 * Updates the status information to the application, depending on application
 * conforms to older mimd ioctl interface or newer NIT ioctl interface
 */
static int
mega_n_to_m(void __user *arg, megacmd_t *mc)
{
	nitioctl_t	__user *uiocp;
	megacmd_t	__user *umc;
	mega_passthru	__user *upthru;
	struct uioctl_t	__user *uioc_mimd;
	char	signature[8] = {0};

	/*
	 * check is the application conforms to NIT.
	 */
	if( copy_from_user(signature, arg, 7) )
		return -EFAULT;

	if( memcmp(signature, "MEGANIT", 7) == 0 ) {

		uiocp = arg;

		if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
			return (-EFAULT);

		if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {

			umc = MBOX_P(uiocp);

			if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
				return -EFAULT;

			if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
				return (-EFAULT);
		}
	}
	else {
		uioc_mimd = arg;

		if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
			return (-EFAULT);

		if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {

			umc = (megacmd_t __user *)uioc_mimd->mbox;

			if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
				return (-EFAULT);

			if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
				return (-EFAULT);
		}
	}

	return 0;
}


/*
 * MEGARAID 'FW' commands.
 */

/**
 * mega_is_bios_enabled()
 * @adapter - pointer to our soft state
 *
 * issue command to find out if the BIOS is enabled for this controller
 */
static int
mega_is_bios_enabled(adapter_t *adapter)
{
	unsigned char	raw_mbox[sizeof(struct mbox_out)];
	mbox_t	*mbox;
	int	ret;

	mbox = (mbox_t *)raw_mbox;

	memset(&mbox->m_out, 0, sizeof(raw_mbox));

	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);

	mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;

	raw_mbox[0] = IS_BIOS_ENABLED;
	raw_mbox[2] = GET_BIOS;


	ret = issue_scb_block(adapter, raw_mbox);

	return *(char *)adapter->mega_buffer;
}


/**
 * mega_enum_raid_scsi()
 * @adapter - pointer to our soft state
 *
 * Find out what channels are RAID/SCSI. This information is used to
 * differentiate the virtual channels and physical channels and to support
 * ROMB feature and non-disk devices.
 */
static void
mega_enum_raid_scsi(adapter_t *adapter)
{
	unsigned char raw_mbox[sizeof(struct mbox_out)];
	mbox_t *mbox;
	int i;

	mbox = (mbox_t *)raw_mbox;

	memset(&mbox->m_out, 0, sizeof(raw_mbox));

	/*
	 * issue command to find out what channels are raid/scsi
	 */
	raw_mbox[0] = CHNL_CLASS;
	raw_mbox[2] = GET_CHNL_CLASS;

	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);

	mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;

	/*
	 * Non-ROMB firmware fail this command, so all channels
	 * must be shown RAID
	 */
	adapter->mega_ch_class = 0xFF;

	if(!issue_scb_block(adapter, raw_mbox)) {
		adapter->mega_ch_class = *((char *)adapter->mega_buffer);

	}

	for( i = 0; i < adapter->product_info.nchannels; i++ ) { 
		if( (adapter->mega_ch_class >> i) & 0x01 ) {
			printk(KERN_INFO "megaraid: channel[%d] is raid.\n",
					i);
		}
		else {
			printk(KERN_INFO "megaraid: channel[%d] is scsi.\n",
					i);
		}
	}

	return;
}


/**
 * mega_get_boot_drv()
 * @adapter - pointer to our soft state
 *
 * Find out which device is the boot device. Note, any logical drive or any
 * phyical device (e.g., a CDROM) can be designated as a boot device.
 */
static void
mega_get_boot_drv(adapter_t *adapter)
{
	struct private_bios_data	*prv_bios_data;
	unsigned char	raw_mbox[sizeof(struct mbox_out)];
	mbox_t	*mbox;
	u16	cksum = 0;
	u8	*cksum_p;
	u8	boot_pdrv;
	int	i;

	mbox = (mbox_t *)raw_mbox;

	memset(&mbox->m_out, 0, sizeof(raw_mbox));

	raw_mbox[0] = BIOS_PVT_DATA;
	raw_mbox[2] = GET_BIOS_PVT_DATA;

	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);

	mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;

	adapter->boot_ldrv_enabled = 0;
	adapter->boot_ldrv = 0;

	adapter->boot_pdrv_enabled = 0;
	adapter->boot_pdrv_ch = 0;
	adapter->boot_pdrv_tgt = 0;

	if(issue_scb_block(adapter, raw_mbox) == 0) {
		prv_bios_data =
			(struct private_bios_data *)adapter->mega_buffer;

		cksum = 0;
		cksum_p = (char *)prv_bios_data;
		for (i = 0; i < 14; i++ ) {
			cksum += (u16)(*cksum_p++);
		}

		if (prv_bios_data->cksum == (u16)(0-cksum) ) {

			/*
			 * If MSB is set, a physical drive is set as boot
			 * device
			 */
			if( prv_bios_data->boot_drv & 0x80 ) {
				adapter->boot_pdrv_enabled = 1;
				boot_pdrv = prv_bios_data->boot_drv & 0x7F;
				adapter->boot_pdrv_ch = boot_pdrv / 16;
				adapter->boot_pdrv_tgt = boot_pdrv % 16;
			}
			else {
				adapter->boot_ldrv_enabled = 1;
				adapter->boot_ldrv = prv_bios_data->boot_drv;
			}
		}
	}

}

/**
 * mega_support_random_del()
 * @adapter - pointer to our soft state
 *
 * Find out if this controller supports random deletion and addition of
 * logical drives
 */
static int
mega_support_random_del(adapter_t *adapter)
{
	unsigned char raw_mbox[sizeof(struct mbox_out)];
	mbox_t *mbox;
	int rval;

	mbox = (mbox_t *)raw_mbox;

	memset(&mbox->m_out, 0, sizeof(raw_mbox));

	/*
	 * issue command
	 */
	raw_mbox[0] = FC_DEL_LOGDRV;
	raw_mbox[2] = OP_SUP_DEL_LOGDRV;

	rval = issue_scb_block(adapter, raw_mbox);

	return !rval;
}


/**
 * mega_support_ext_cdb()
 * @adapter - pointer to our soft state
 *
 * Find out if this firmware support cdblen > 10
 */
static int
mega_support_ext_cdb(adapter_t *adapter)
{
	unsigned char raw_mbox[sizeof(struct mbox_out)];
	mbox_t *mbox;
	int rval;

	mbox = (mbox_t *)raw_mbox;

	memset(&mbox->m_out, 0, sizeof(raw_mbox));
	/*
	 * issue command to find out if controller supports extended CDBs.
	 */
	raw_mbox[0] = 0xA4;
	raw_mbox[2] = 0x16;

	rval = issue_scb_block(adapter, raw_mbox);

	return !rval;
}


/**
 * mega_del_logdrv()
 * @adapter - pointer to our soft state
 * @logdrv - logical drive to be deleted
 *
 * Delete the specified logical drive. It is the responsibility of the user
 * app to let the OS know about this operation.
 */
static int
mega_del_logdrv(adapter_t *adapter, int logdrv)
{
	unsigned long flags;
	scb_t *scb;
	int rval;

	/*
	 * Stop sending commands to the controller, queue them internally.
	 * When deletion is complete, ISR will flush the queue.
	 */
	atomic_set(&adapter->quiescent, 1);

	/*
	 * Wait till all the issued commands are complete and there are no
	 * commands in the pending queue
	 */
	while (atomic_read(&adapter->pend_cmds) > 0 ||
	       !list_empty(&adapter->pending_list))
		msleep(1000);	/* sleep for 1s */

	rval = mega_do_del_logdrv(adapter, logdrv);

	spin_lock_irqsave(&adapter->lock, flags);

	/*
	 * If delete operation was successful, add 0x80 to the logical drive
	 * ids for commands in the pending queue.
	 */
	if (adapter->read_ldidmap) {
		struct list_head *pos;
		list_for_each(pos, &adapter->pending_list) {
			scb = list_entry(pos, scb_t, list);
			if (scb->pthru->logdrv < 0x80 )
				scb->pthru->logdrv += 0x80;
		}
	}

	atomic_set(&adapter->quiescent, 0);

	mega_runpendq(adapter);

	spin_unlock_irqrestore(&adapter->lock, flags);

	return rval;
}


static int
mega_do_del_logdrv(adapter_t *adapter, int logdrv)
{
	megacmd_t	mc;
	int	rval;

	memset( &mc, 0, sizeof(megacmd_t));

	mc.cmd = FC_DEL_LOGDRV;
	mc.opcode = OP_DEL_LOGDRV;
	mc.subopcode = logdrv;

	rval = mega_internal_command(adapter, &mc, NULL);

	/* log this event */
	if(rval) {
		printk(KERN_WARNING "megaraid: Delete LD-%d failed.", logdrv);
		return rval;
	}

	/*
	 * After deleting first logical drive, the logical drives must be
	 * addressed by adding 0x80 to the logical drive id.
	 */
	adapter->read_ldidmap = 1;

	return rval;
}


/**
 * mega_get_max_sgl()
 * @adapter - pointer to our soft state
 *
 * Find out the maximum number of scatter-gather elements supported by this
 * version of the firmware
 */
static void
mega_get_max_sgl(adapter_t *adapter)
{
	unsigned char	raw_mbox[sizeof(struct mbox_out)];
	mbox_t	*mbox;

	mbox = (mbox_t *)raw_mbox;

	memset(mbox, 0, sizeof(raw_mbox));

	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);

	mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;

	raw_mbox[0] = MAIN_MISC_OPCODE;
	raw_mbox[2] = GET_MAX_SG_SUPPORT;


	if( issue_scb_block(adapter, raw_mbox) ) {
		/*
		 * f/w does not support this command. Choose the default value
		 */
		adapter->sglen = MIN_SGLIST;
	}
	else {
		adapter->sglen = *((char *)adapter->mega_buffer);
		
		/*
		 * Make sure this is not more than the resources we are
		 * planning to allocate
		 */
		if ( adapter->sglen > MAX_SGLIST )
			adapter->sglen = MAX_SGLIST;
	}

	return;
}


/**
 * mega_support_cluster()
 * @adapter - pointer to our soft state
 *
 * Find out if this firmware support cluster calls.
 */
static int
mega_support_cluster(adapter_t *adapter)
{
	unsigned char	raw_mbox[sizeof(struct mbox_out)];
	mbox_t	*mbox;

	mbox = (mbox_t *)raw_mbox;

	memset(mbox, 0, sizeof(raw_mbox));

	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);

	mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;

	/*
	 * Try to get the initiator id. This command will succeed iff the
	 * clustering is available on this HBA.
	 */
	raw_mbox[0] = MEGA_GET_TARGET_ID;

	if( issue_scb_block(adapter, raw_mbox) == 0 ) {

		/*
		 * Cluster support available. Get the initiator target id.
		 * Tell our id to mid-layer too.
		 */
		adapter->this_id = *(u32 *)adapter->mega_buffer;
		adapter->host->this_id = adapter->this_id;

		return 1;
	}

	return 0;
}

#ifdef CONFIG_PROC_FS
/**
 * mega_adapinq()
 * @adapter - pointer to our soft state
 * @dma_handle - DMA address of the buffer
 *
 * Issue internal commands while interrupts are available.
 * We only issue direct mailbox commands from within the driver. ioctl()
 * interface using these routines can issue passthru commands.
 */
static int
mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle)
{
	megacmd_t	mc;

	memset(&mc, 0, sizeof(megacmd_t));

	if( adapter->flag & BOARD_40LD ) {
		mc.cmd = FC_NEW_CONFIG;
		mc.opcode = NC_SUBOP_ENQUIRY3;
		mc.subopcode = ENQ3_GET_SOLICITED_FULL;
	}
	else {
		mc.cmd = MEGA_MBOXCMD_ADPEXTINQ;
	}

	mc.xferaddr = (u32)dma_handle;

	if ( mega_internal_command(adapter, &mc, NULL) != 0 ) {
		return -1;
	}

	return 0;
}


/** mega_internal_dev_inquiry()
 * @adapter - pointer to our soft state
 * @ch - channel for this device
 * @tgt - ID of this device
 * @buf_dma_handle - DMA address of the buffer
 *
 * Issue the scsi inquiry for the specified device.
 */
static int
mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt,
		dma_addr_t buf_dma_handle)
{
	mega_passthru	*pthru;
	dma_addr_t	pthru_dma_handle;
	megacmd_t	mc;
	int		rval;
	struct pci_dev	*pdev;


	/*
	 * For all internal commands, the buffer must be allocated in <4GB
	 * address range
	 */
	if( make_local_pdev(adapter, &pdev) != 0 ) return -1;

	pthru = pci_alloc_consistent(pdev, sizeof(mega_passthru),
			&pthru_dma_handle);

	if( pthru == NULL ) {
		free_local_pdev(pdev);
		return -1;
	}

	pthru->timeout = 2;
	pthru->ars = 1;
	pthru->reqsenselen = 14;
	pthru->islogical = 0;

	pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch;

	pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt;

	pthru->cdblen = 6;

	pthru->cdb[0] = INQUIRY;
	pthru->cdb[1] = 0;
	pthru->cdb[2] = 0;
	pthru->cdb[3] = 0;
	pthru->cdb[4] = 255;
	pthru->cdb[5] = 0;


	pthru->dataxferaddr = (u32)buf_dma_handle;
	pthru->dataxferlen = 256;

	memset(&mc, 0, sizeof(megacmd_t));

	mc.cmd = MEGA_MBOXCMD_PASSTHRU;
	mc.xferaddr = (u32)pthru_dma_handle;

	rval = mega_internal_command(adapter, &mc, pthru);

	pci_free_consistent(pdev, sizeof(mega_passthru), pthru,
			pthru_dma_handle);

	free_local_pdev(pdev);

	return rval;
}
#endif

/**
 * mega_internal_command()
 * @adapter - pointer to our soft state
 * @mc - the mailbox command
 * @pthru - Passthru structure for DCDB commands
 *
 * Issue the internal commands in interrupt mode.
 * The last argument is the address of the passthru structure if the command
 * to be fired is a passthru command
 *
 * lockscope specifies whether the caller has already acquired the lock. Of
 * course, the caller must know which lock we are talking about.
 *
 * Note: parameter 'pthru' is null for non-passthru commands.
 */
static int
mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
{
	Scsi_Cmnd	*scmd;
	struct	scsi_device *sdev;
	scb_t	*scb;
	int	rval;

	scmd = scsi_allocate_command(GFP_KERNEL);
	if (!scmd)
		return -ENOMEM;

	/*
	 * The internal commands share one command id and hence are
	 * serialized. This is so because we want to reserve maximum number of
	 * available command ids for the I/O commands.
	 */
	mutex_lock(&adapter->int_mtx);

	scb = &adapter->int_scb;
	memset(scb, 0, sizeof(scb_t));

	sdev = kzalloc(sizeof(struct scsi_device), GFP_KERNEL);
	scmd->device = sdev;

	memset(adapter->int_cdb, 0, sizeof(adapter->int_cdb));
	scmd->cmnd = adapter->int_cdb;
	scmd->device->host = adapter->host;
	scmd->host_scribble = (void *)scb;
	scmd->cmnd[0] = MEGA_INTERNAL_CMD;

	scb->state |= SCB_ACTIVE;
	scb->cmd = scmd;

	memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));

	/*
	 * Is it a passthru command
	 */
	if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {

		scb->pthru = pthru;
	}

	scb->idx = CMDID_INT_CMDS;

	megaraid_queue_lck(scmd, mega_internal_done);

	wait_for_completion(&adapter->int_waitq);

	rval = scmd->result;
	mc->status = scmd->result;
	kfree(sdev);

	/*
	 * Print a debug message for all failed commands. Applications can use
	 * this information.
	 */
	if( scmd->result && trace_level ) {
		printk("megaraid: cmd [%x, %x, %x] status:[%x]\n",
			mc->cmd, mc->opcode, mc->subopcode, scmd->result);
	}

	mutex_unlock(&adapter->int_mtx);

	scsi_free_command(GFP_KERNEL, scmd);

	return rval;
}


/**
 * mega_internal_done()
 * @scmd - internal scsi command
 *
 * Callback routine for internal commands.
 */
static void
mega_internal_done(Scsi_Cmnd *scmd)
{
	adapter_t	*adapter;

	adapter = (adapter_t *)scmd->device->host->hostdata;

	complete(&adapter->int_waitq);

}


static struct scsi_host_template megaraid_template = {
	.module				= THIS_MODULE,
	.name				= "MegaRAID",
	.proc_name			= "megaraid_legacy",
	.info				= megaraid_info,
	.queuecommand			= megaraid_queue,	
	.bios_param			= megaraid_biosparam,
	.max_sectors			= MAX_SECTORS_PER_IO,
	.can_queue			= MAX_COMMANDS,
	.this_id			= DEFAULT_INITIATOR_ID,
	.sg_tablesize			= MAX_SGLIST,
	.cmd_per_lun			= DEF_CMD_PER_LUN,
	.use_clustering			= ENABLE_CLUSTERING,
	.eh_abort_handler		= megaraid_abort,
	.eh_device_reset_handler	= megaraid_reset,
	.eh_bus_reset_handler		= megaraid_reset,
	.eh_host_reset_handler		= megaraid_reset,
};

static int __devinit
megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
	struct Scsi_Host *host;
	adapter_t *adapter;
	unsigned long mega_baseport, tbase, flag = 0;
	u16 subsysid, subsysvid;
	u8 pci_bus, pci_dev_func;
	int irq, i, j;
	int error = -ENODEV;

	if (pci_enable_device(pdev))
		goto out;
	pci_set_master(pdev);

	pci_bus = pdev->bus->number;
	pci_dev_func = pdev->devfn;

	/*
	 * The megaraid3 stuff reports the ID of the Intel part which is not
	 * remotely specific to the megaraid
	 */
	if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
		u16 magic;
		/*
		 * Don't fall over the Compaq management cards using the same
		 * PCI identifier
		 */
		if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
		    pdev->subsystem_device == 0xC000)
		   	return -ENODEV;
		/* Now check the magic signature byte */
		pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
		if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
			return -ENODEV;
		/* Ok it is probably a megaraid */
	}

	/*
	 * For these vendor and device ids, signature offsets are not
	 * valid and 64 bit is implicit
	 */
	if (id->driver_data & BOARD_64BIT)
		flag |= BOARD_64BIT;
	else {
		u32 magic64;

		pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
		if (magic64 == HBA_SIGNATURE_64BIT)
			flag |= BOARD_64BIT;
	}

	subsysvid = pdev->subsystem_vendor;
	subsysid = pdev->subsystem_device;

	printk(KERN_NOTICE "megaraid: found 0x%4.04x:0x%4.04x:bus %d:",
		id->vendor, id->device, pci_bus);

	printk("slot %d:func %d\n",
		PCI_SLOT(pci_dev_func), PCI_FUNC(pci_dev_func));

	/* Read the base port and IRQ from PCI */
	mega_baseport = pci_resource_start(pdev, 0);
	irq = pdev->irq;

	tbase = mega_baseport;
	if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
		flag |= BOARD_MEMMAP;

		if (!request_mem_region(mega_baseport, 128, "megaraid")) {
			printk(KERN_WARNING "megaraid: mem region busy!\n");
			goto out_disable_device;
		}

		mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
		if (!mega_baseport) {
			printk(KERN_WARNING
			       "megaraid: could not map hba memory\n");
			goto out_release_region;
		}
	} else {
		flag |= BOARD_IOMAP;
		mega_baseport += 0x10;

		if (!request_region(mega_baseport, 16, "megaraid"))
			goto out_disable_device;
	}

	/* Initialize SCSI Host structure */
	host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
	if (!host)
		goto out_iounmap;

	adapter = (adapter_t *)host->hostdata;
	memset(adapter, 0, sizeof(adapter_t));

	printk(KERN_NOTICE
		"scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
		host->host_no, mega_baseport, irq);

	adapter->base = mega_baseport;
	if (flag & BOARD_MEMMAP)
		adapter->mmio_base = (void __iomem *) mega_baseport;

	INIT_LIST_HEAD(&adapter->free_list);
	INIT_LIST_HEAD(&adapter->pending_list);
	INIT_LIST_HEAD(&adapter->completed_list);

	adapter->flag = flag;
	spin_lock_init(&adapter->lock);

	host->cmd_per_lun = max_cmd_per_lun;
	host->max_sectors = max_sectors_per_io;

	adapter->dev = pdev;
	adapter->host = host;

	adapter->host->irq = irq;

	if (flag & BOARD_MEMMAP)
		adapter->host->base = tbase;
	else {
		adapter->host->io_port = tbase;
		adapter->host->n_io_port = 16;
	}

	adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;

	/*
	 * Allocate buffer to issue internal commands.
	 */
	adapter->mega_buffer = pci_alloc_consistent(adapter->dev,
		MEGA_BUFFER_SIZE, &adapter->buf_dma_handle);
	if (!adapter->mega_buffer) {
		printk(KERN_WARNING "megaraid: out of RAM.\n");
		goto out_host_put;
	}

	adapter->scb_list = kmalloc(sizeof(scb_t) * MAX_COMMANDS, GFP_KERNEL);
	if (!adapter->scb_list) {
		printk(KERN_WARNING "megaraid: out of RAM.\n");
		goto out_free_cmd_buffer;
	}

	if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
				megaraid_isr_memmapped : megaraid_isr_iomapped,
					IRQF_SHARED, "megaraid", adapter)) {
		printk(KERN_WARNING
			"megaraid: Couldn't register IRQ %d!\n", irq);
		goto out_free_scb_list;
	}

	if (mega_setup_mailbox(adapter))
		goto out_free_irq;

	if (mega_query_adapter(adapter))
		goto out_free_mbox;

	/*
	 * Have checks for some buggy f/w
	 */
	if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
		/*
		 * Which firmware
		 */
		if (!strcmp(adapter->fw_version, "3.00") ||
				!strcmp(adapter->fw_version, "3.01")) {

			printk( KERN_WARNING
				"megaraid: Your  card is a Dell PERC "
				"2/SC RAID controller with  "
				"firmware\nmegaraid: 3.00 or 3.01.  "
				"This driver is known to have "
				"corruption issues\nmegaraid: with "
				"those firmware versions on this "
				"specific card.  In order\nmegaraid: "
				"to protect your data, please upgrade "
				"your firmware to version\nmegaraid: "
				"3.10 or later, available from the "
				"Dell Technical Support web\n"
				"megaraid: site at\nhttp://support."
				"dell.com/us/en/filelib/download/"
				"index.asp?fileid=2940\n"
			);
		}
	}

	/*
	 * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
	 * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
	 * support, since this firmware cannot handle 64 bit
	 * addressing
	 */
	if ((subsysvid == PCI_VENDOR_ID_HP) &&
	    ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
		/*
		 * which firmware
		 */
		if (!strcmp(adapter->fw_version, "H01.07") ||
		    !strcmp(adapter->fw_version, "H01.08") ||
		    !strcmp(adapter->fw_version, "H01.09") ) {
			printk(KERN_WARNING
				"megaraid: Firmware H.01.07, "
				"H.01.08, and H.01.09 on 1M/2M "
				"controllers\n"
				"megaraid: do not support 64 bit "
				"addressing.\nmegaraid: DISABLING "
				"64 bit support.\n");
			adapter->flag &= ~BOARD_64BIT;
		}
	}

	if (mega_is_bios_enabled(adapter))
		mega_hbas[hba_count].is_bios_enabled = 1;
	mega_hbas[hba_count].hostdata_addr = adapter;

	/*
	 * Find out which channel is raid and which is scsi. This is
	 * for ROMB support.
	 */
	mega_enum_raid_scsi(adapter);

	/*
	 * Find out if a logical drive is set as the boot drive. If
	 * there is one, will make that as the first logical drive.
	 * ROMB: Do we have to boot from a physical drive. Then all
	 * the physical drives would appear before the logical disks.
	 * Else, all the physical drives would be exported to the mid
	 * layer after logical drives.
	 */
	mega_get_boot_drv(adapter);

	if (adapter->boot_pdrv_enabled) {
		j = adapter->product_info.nchannels;
		for( i = 0; i < j; i++ )
			adapter->logdrv_chan[i] = 0;
		for( i = j; i < NVIRT_CHAN + j; i++ )
			adapter->logdrv_chan[i] = 1;
	} else {
		for (i = 0; i < NVIRT_CHAN; i++)
			adapter->logdrv_chan[i] = 1;
		for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
			adapter->logdrv_chan[i] = 0;
		adapter->mega_ch_class <<= NVIRT_CHAN;
	}

	/*
	 * Do we support random deletion and addition of logical
	 * drives
	 */
	adapter->read_ldidmap = 0;	/* set it after first logdrv
						   delete cmd */
	adapter->support_random_del = mega_support_random_del(adapter);

	/* Initialize SCBs */
	if (mega_init_scb(adapter))
		goto out_free_mbox;

	/*
	 * Reset the pending commands counter
	 */
	atomic_set(&adapter->pend_cmds, 0);

	/*
	 * Reset the adapter quiescent flag
	 */
	atomic_set(&adapter->quiescent, 0);

	hba_soft_state[hba_count] = adapter;

	/*
	 * Fill in the structure which needs to be passed back to the
	 * application when it does an ioctl() for controller related
	 * information.
	 */
	i = hba_count;

	mcontroller[i].base = mega_baseport;
	mcontroller[i].irq = irq;
	mcontroller[i].numldrv = adapter->numldrv;
	mcontroller[i].pcibus = pci_bus;
	mcontroller[i].pcidev = id->device;
	mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
	mcontroller[i].pciid = -1;
	mcontroller[i].pcivendor = id->vendor;
	mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
	mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;


	/* Set the Mode of addressing to 64 bit if we can */
	if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
		pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
		adapter->has_64bit_addr = 1;
	} else  {
		pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
		adapter->has_64bit_addr = 0;
	}
		
	mutex_init(&adapter->int_mtx);
	init_completion(&adapter->int_waitq);

	adapter->this_id = DEFAULT_INITIATOR_ID;
	adapter->host->this_id = DEFAULT_INITIATOR_ID;

#if MEGA_HAVE_CLUSTERING
	/*
	 * Is cluster support enabled on this controller
	 * Note: In a cluster the HBAs ( the initiators ) will have
	 * different target IDs and we cannot assume it to be 7. Call
	 * to mega_support_cluster() will get the target ids also if
	 * the cluster support is available
	 */
	adapter->has_cluster = mega_support_cluster(adapter);
	if (adapter->has_cluster) {
		printk(KERN_NOTICE
			"megaraid: Cluster driver, initiator id:%d\n",
			adapter->this_id);
	}
#endif

	pci_set_drvdata(pdev, host);

	mega_create_proc_entry(hba_count, mega_proc_dir_entry);

	error = scsi_add_host(host, &pdev->dev);
	if (error)
		goto out_free_mbox;

	scsi_scan_host(host);
	hba_count++;
	return 0;

 out_free_mbox:
	pci_free_consistent(adapter->dev, sizeof(mbox64_t),
			adapter->una_mbox64, adapter->una_mbox64_dma);
 out_free_irq:
	free_irq(adapter->host->irq, adapter);
 out_free_scb_list:
	kfree(adapter->scb_list);
 out_free_cmd_buffer:
	pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
			adapter->mega_buffer, adapter->buf_dma_handle);
 out_host_put:
	scsi_host_put(host);
 out_iounmap:
	if (flag & BOARD_MEMMAP)
		iounmap((void *)mega_baseport);
 out_release_region:
	if (flag & BOARD_MEMMAP)
		release_mem_region(tbase, 128);
	else
		release_region(mega_baseport, 16);
 out_disable_device:
	pci_disable_device(pdev);
 out:
	return error;
}

static void
__megaraid_shutdown(adapter_t *adapter)
{
	u_char	raw_mbox[sizeof(struct mbox_out)];
	mbox_t	*mbox = (mbox_t *)raw_mbox;
	int	i;

	/* Flush adapter cache */
	memset(&mbox->m_out, 0, sizeof(raw_mbox));
	raw_mbox[0] = FLUSH_ADAPTER;

	free_irq(adapter->host->irq, adapter);

	/* Issue a blocking (interrupts disabled) command to the card */
	issue_scb_block(adapter, raw_mbox);

	/* Flush disks cache */
	memset(&mbox->m_out, 0, sizeof(raw_mbox));
	raw_mbox[0] = FLUSH_SYSTEM;

	/* Issue a blocking (interrupts disabled) command to the card */
	issue_scb_block(adapter, raw_mbox);
	
	if (atomic_read(&adapter->pend_cmds) > 0)
		printk(KERN_WARNING "megaraid: pending commands!!\n");

	/*
	 * Have a delibrate delay to make sure all the caches are
	 * actually flushed.
	 */
	for (i = 0; i <= 10; i++)
		mdelay(1000);
}

static void __devexit
megaraid_remove_one(struct pci_dev *pdev)
{
	struct Scsi_Host *host = pci_get_drvdata(pdev);
	adapter_t *adapter = (adapter_t *)host->hostdata;

	scsi_remove_host(host);

	__megaraid_shutdown(adapter);

	/* Free our resources */
	if (adapter->flag & BOARD_MEMMAP) {
		iounmap((void *)adapter->base);
		release_mem_region(adapter->host->base, 128);
	} else
		release_region(adapter->base, 16);

	mega_free_sgl(adapter);

#ifdef CONFIG_PROC_FS
	if (adapter->controller_proc_dir_entry) {
		remove_proc_entry("stat", adapter->controller_proc_dir_entry);
		remove_proc_entry("config",
				adapter->controller_proc_dir_entry);
		remove_proc_entry("mailbox",
				adapter->controller_proc_dir_entry);
#if MEGA_HAVE_ENH_PROC
		remove_proc_entry("rebuild-rate",
				adapter->controller_proc_dir_entry);
		remove_proc_entry("battery-status",
				adapter->controller_proc_dir_entry);

		remove_proc_entry("diskdrives-ch0",
				adapter->controller_proc_dir_entry);
		remove_proc_entry("diskdrives-ch1",
				adapter->controller_proc_dir_entry);
		remove_proc_entry("diskdrives-ch2",
				adapter->controller_proc_dir_entry);
		remove_proc_entry("diskdrives-ch3",
				adapter->controller_proc_dir_entry);

		remove_proc_entry("raiddrives-0-9",
				adapter->controller_proc_dir_entry);
		remove_proc_entry("raiddrives-10-19",
				adapter->controller_proc_dir_entry);
		remove_proc_entry("raiddrives-20-29",
				adapter->controller_proc_dir_entry);
		remove_proc_entry("raiddrives-30-39",
				adapter->controller_proc_dir_entry);
#endif
		{
			char	buf[12] = { 0 };
			sprintf(buf, "hba%d", adapter->host->host_no);
			remove_proc_entry(buf, mega_proc_dir_entry);
		}
	}
#endif

	pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
			adapter->mega_buffer, adapter->buf_dma_handle);
	kfree(adapter->scb_list);
	pci_free_consistent(adapter->dev, sizeof(mbox64_t),
			adapter->una_mbox64, adapter->una_mbox64_dma);

	scsi_host_put(host);
	pci_disable_device(pdev);

	hba_count--;
}

static void
megaraid_shutdown(struct pci_dev *pdev)
{
	struct Scsi_Host *host = pci_get_drvdata(pdev);
	adapter_t *adapter = (adapter_t *)host->hostdata;

	__megaraid_shutdown(adapter);
}

static struct pci_device_id megaraid_pci_tbl[] = {
	{PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0,}
};
MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl);

static struct pci_driver megaraid_pci_driver = {
	.name		= "megaraid_legacy",
	.id_table	= megaraid_pci_tbl,
	.probe		= megaraid_probe_one,
	.remove		= __devexit_p(megaraid_remove_one),
	.shutdown	= megaraid_shutdown,
};

static int __init megaraid_init(void)
{
	int error;

	if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN))
		max_cmd_per_lun = MAX_CMD_PER_LUN;
	if (max_mbox_busy_wait > MBOX_BUSY_WAIT)
		max_mbox_busy_wait = MBOX_BUSY_WAIT;

#ifdef CONFIG_PROC_FS
	mega_proc_dir_entry = proc_mkdir("megaraid", NULL);
	if (!mega_proc_dir_entry) {
		printk(KERN_WARNING
				"megaraid: failed to create megaraid root\n");
	}
#endif
	error = pci_register_driver(&megaraid_pci_driver);
	if (error) {
#ifdef CONFIG_PROC_FS
		remove_proc_entry("megaraid", NULL);
#endif
		return error;
	}

	/*
	 * Register the driver as a character device, for applications
	 * to access it for ioctls.
	 * First argument (major) to register_chrdev implies a dynamic
	 * major number allocation.
	 */
	major = register_chrdev(0, "megadev_legacy", &megadev_fops);
	if (!major) {
		printk(KERN_WARNING
				"megaraid: failed to register char device\n");
	}

	return 0;
}

static void __exit megaraid_exit(void)
{
	/*
	 * Unregister the character device interface to the driver.
	 */
	unregister_chrdev(major, "megadev_legacy");

	pci_unregister_driver(&megaraid_pci_driver);

#ifdef CONFIG_PROC_FS
	remove_proc_entry("megaraid", NULL);
#endif
}

module_init(megaraid_init);
module_exit(megaraid_exit);

/* vi: set ts=8 sw=8 tw=78: */