drivers/scsi/megaraid.c

   1 /*
   2  *
   3  *                      Linux MegaRAID device driver
   4  *
   5  * Copyright (c) 2002  LSI Logic Corporation.
   6  *
   7  *         This program is free software; you can redistribute it and/or
   8  *         modify it under the terms of the GNU General Public License
   9  *         as published by the Free Software Foundation; either version
  10  *         2 of the License, or (at your option) any later version.
  11  *
  12  * Copyright (c) 2002  Red Hat, Inc. All rights reserved.
  13  *        - fixes
  14  *        - speed-ups (list handling fixes, issued_list, optimizations.)
  15  *        - lots of cleanups.
  16  *
  17  * Copyright (c) 2003  Christoph Hellwig  <hch@lst.de>
  18  *        - new-style, hotplug-aware pci probing and scsi registration
  19  *
  20  * Version : v2.00.4 Mon Nov 14 14:02:43 EST 2005 - Seokmann Ju
  21  *                                              <Seokmann.Ju@lsil.com>
  22  *
  23  * Description: Linux device driver for LSI Logic MegaRAID controller
  24  *
  25  * Supported controllers: MegaRAID 418, 428, 438, 466, 762, 467, 471, 490, 493
  26  *                                      518, 520, 531, 532
  27  *
  28  * This driver is supported by LSI Logic, with assistance from Red Hat, Dell,
  29  * and others. Please send updates to the mailing list
  30  * linux-scsi@vger.kernel.org .
  31  *
  32  */
  33
  34 #include <linux/mm.h>
  35 #include <linux/fs.h>
  36 #include <linux/blkdev.h>
  37 #include <asm/uaccess.h>
  38 #include <asm/io.h>
  39 #include <linux/completion.h>
  40 #include <linux/delay.h>
  41 #include <linux/proc_fs.h>
  42 #include <linux/reboot.h>
  43 #include <linux/module.h>
  44 #include <linux/list.h>
  45 #include <linux/interrupt.h>
  46 #include <linux/pci.h>
  47 #include <linux/init.h>
  48 #include <linux/dma-mapping.h>
  49 #include <linux/mutex.h>
  50 #include <linux/slab.h>
  51 #include <scsi/scsicam.h>
  52
  53 #include "scsi.h"
  54 #include <scsi/scsi_host.h>
  55
  56 #include "megaraid.h"
  57
  58 #define MEGARAID_MODULE_VERSION "2.00.4"
  59
  60 MODULE_AUTHOR ("sju@lsil.com");
  61 MODULE_DESCRIPTION ("LSI Logic MegaRAID legacy driver");
  62 MODULE_LICENSE ("GPL");
  63 MODULE_VERSION(MEGARAID_MODULE_VERSION);
  64
  65 static DEFINE_MUTEX(megadev_mutex);
  66 static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
  67 module_param(max_cmd_per_lun, uint, 0);
  68 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)");
  69
  70 static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO;
  71 module_param(max_sectors_per_io, ushort, 0);
  72 MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)");
  73
  74
  75 static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT;
  76 module_param(max_mbox_busy_wait, ushort, 0);
  77 MODULE_PARM_DESC(max_mbox_busy_wait, "Maximum wait for mailbox in microseconds if busy (default=MBOX_BUSY_WAIT=10)");
  78
  79 #define RDINDOOR(adapter)       readl((adapter)->mmio_base + 0x20)
  80 #define RDOUTDOOR(adapter)      readl((adapter)->mmio_base + 0x2C)
  81 #define WRINDOOR(adapter,value)  writel(value, (adapter)->mmio_base + 0x20)
  82 #define WROUTDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x2C)
  83
  84 /*
  85  * Global variables
  86  */
  87
  88 static int hba_count;
  89 static adapter_t *hba_soft_state[MAX_CONTROLLERS];
  90 static struct proc_dir_entry *mega_proc_dir_entry;
  91
  92 /* For controller re-ordering */
  93 static struct mega_hbas mega_hbas[MAX_CONTROLLERS];
  94
  95 static long
  96 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
  97
  98 /*
  99  * The File Operations structure for the serial/ioctl interface of the driver
 100  */
 101 static const struct file_operations megadev_fops = {
 102         .owner          = THIS_MODULE,
 103         .unlocked_ioctl = megadev_unlocked_ioctl,
 104         .open           = megadev_open,
 105         .llseek         = noop_llseek,
 106 };
 107
 108 /*
 109  * Array to structures for storing the information about the controllers. This
 110  * information is sent to the user level applications, when they do an ioctl
 111  * for this information.
 112  */
 113 static struct mcontroller mcontroller[MAX_CONTROLLERS];
 114
 115 /* The current driver version */
 116 static u32 driver_ver = 0x02000000;
 117
 118 /* major number used by the device for character interface */
 119 static int major;
 120
 121 #define IS_RAID_CH(hba, ch)     (((hba)->mega_ch_class >> (ch)) & 0x01)
 122
 123
 124 /*
 125  * Debug variable to print some diagnostic messages
 126  */
 127 static int trace_level;
 128
 129 /**
 130  * mega_setup_mailbox()
 131  * @adapter - pointer to our soft state
 132  *
 133  * Allocates a 8 byte aligned memory for the handshake mailbox.
 134  */
 135 static int
 136 mega_setup_mailbox(adapter_t *adapter)
 137 {
 138         unsigned long   align;
 139
 140         adapter->una_mbox64 = pci_alloc_consistent(adapter->dev,
 141                         sizeof(mbox64_t), &adapter->una_mbox64_dma);
 142
 143         if( !adapter->una_mbox64 ) return -1;
 144
 145         adapter->mbox = &adapter->una_mbox64->mbox;
 146
 147         adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) &
 148                         (~0UL ^ 0xFUL));
 149
 150         adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8);
 151
 152         align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox);
 153
 154         adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align;
 155
 156         /*
 157          * Register the mailbox if the controller is an io-mapped controller
 158          */
 159         if( adapter->flag & BOARD_IOMAP ) {
 160
 161                 outb(adapter->mbox_dma & 0xFF,
 162                                 adapter->host->io_port + MBOX_PORT0);
 163
 164                 outb((adapter->mbox_dma >> 8) & 0xFF,
 165                                 adapter->host->io_port + MBOX_PORT1);
 166
 167                 outb((adapter->mbox_dma >> 16) & 0xFF,
 168                                 adapter->host->io_port + MBOX_PORT2);
 169
 170                 outb((adapter->mbox_dma >> 24) & 0xFF,
 171                                 adapter->host->io_port + MBOX_PORT3);
 172
 173                 outb(ENABLE_MBOX_BYTE,
 174                                 adapter->host->io_port + ENABLE_MBOX_REGION);
 175
 176                 irq_ack(adapter);
 177
 178                 irq_enable(adapter);
 179         }
 180
 181         return 0;
 182 }
 183
 184
 185 /*
 186  * mega_query_adapter()
 187  * @adapter - pointer to our soft state
 188  *
 189  * Issue the adapter inquiry commands to the controller and find out
 190  * information and parameter about the devices attached
 191  */
 192 static int
 193 mega_query_adapter(adapter_t *adapter)
 194 {
 195         dma_addr_t      prod_info_dma_handle;
 196         mega_inquiry3   *inquiry3;
 197         u8      raw_mbox[sizeof(struct mbox_out)];
 198         mbox_t  *mbox;
 199         int     retval;
 200
 201         /* Initialize adapter inquiry mailbox */
 202
 203         mbox = (mbox_t *)raw_mbox;
 204
 205         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
 206         memset(&mbox->m_out, 0, sizeof(raw_mbox));
 207
 208         /*
 209          * Try to issue Inquiry3 command
 210          * if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
 211          * update enquiry3 structure
 212          */
 213         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
 214
 215         inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;
 216
 217         raw_mbox[0] = FC_NEW_CONFIG;            /* i.e. mbox->cmd=0xA1 */
 218         raw_mbox[2] = NC_SUBOP_ENQUIRY3;        /* i.e. 0x0F */
 219         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;  /* i.e. 0x02 */
 220
 221         /* Issue a blocking command to the card */
 222         if ((retval = issue_scb_block(adapter, raw_mbox))) {
 223                 /* the adapter does not support 40ld */
 224
 225                 mraid_ext_inquiry       *ext_inq;
 226                 mraid_inquiry           *inq;
 227                 dma_addr_t              dma_handle;
 228
 229                 ext_inq = pci_alloc_consistent(adapter->dev,
 230                                 sizeof(mraid_ext_inquiry), &dma_handle);
 231
 232                 if( ext_inq == NULL ) return -1;
 233
 234                 inq = &ext_inq->raid_inq;
 235
 236                 mbox->m_out.xferaddr = (u32)dma_handle;
 237
 238                 /*issue old 0x04 command to adapter */
 239                 mbox->m_out.cmd = MEGA_MBOXCMD_ADPEXTINQ;
 240
 241                 issue_scb_block(adapter, raw_mbox);
 242
 243                 /*
 244                  * update Enquiry3 and ProductInfo structures with
 245                  * mraid_inquiry structure
 246                  */
 247                 mega_8_to_40ld(inq, inquiry3,
 248                                 (mega_product_info *)&adapter->product_info);
 249
 250                 pci_free_consistent(adapter->dev, sizeof(mraid_ext_inquiry),
 251                                 ext_inq, dma_handle);
 252
 253         } else {                /*adapter supports 40ld */
 254                 adapter->flag |= BOARD_40LD;
 255
 256                 /*
 257                  * get product_info, which is static information and will be
 258                  * unchanged
 259                  */
 260                 prod_info_dma_handle = pci_map_single(adapter->dev, (void *)
 261                                 &adapter->product_info,
 262                                 sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
 263
 264                 mbox->m_out.xferaddr = prod_info_dma_handle;
 265
 266                 raw_mbox[0] = FC_NEW_CONFIG;    /* i.e. mbox->cmd=0xA1 */
 267                 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;    /* i.e. 0x0E */
 268
 269                 if ((retval = issue_scb_block(adapter, raw_mbox)))
 270                         printk(KERN_WARNING
 271                         "megaraid: Product_info cmd failed with error: %d\n",
 272                                 retval);
 273
 274                 pci_unmap_single(adapter->dev, prod_info_dma_handle,
 275                                 sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
 276         }
 277
 278
 279         /*
 280          * kernel scans the channels from 0 to <= max_channel
 281          */
 282         adapter->host->max_channel =
 283                 adapter->product_info.nchannels + NVIRT_CHAN -1;
 284
 285         adapter->host->max_id = 16;     /* max targets per channel */
 286
 287         adapter->host->max_lun = 7;     /* Up to 7 luns for non disk devices */
 288
 289         adapter->host->cmd_per_lun = max_cmd_per_lun;
 290
 291         adapter->numldrv = inquiry3->num_ldrv;
 292
 293         adapter->max_cmds = adapter->product_info.max_commands;
 294
 295         if(adapter->max_cmds > MAX_COMMANDS)
 296                 adapter->max_cmds = MAX_COMMANDS;
 297
 298         adapter->host->can_queue = adapter->max_cmds - 1;
 299
 300         /*
 301          * Get the maximum number of scatter-gather elements supported by this
 302          * firmware
 303          */
 304         mega_get_max_sgl(adapter);
 305
 306         adapter->host->sg_tablesize = adapter->sglen;
 307
 308
 309         /* use HP firmware and bios version encoding */
 310         if (adapter->product_info.subsysvid == HP_SUBSYS_VID) {
 311                 sprintf (adapter->fw_version, "%c%d%d.%d%d",
 312                          adapter->product_info.fw_version[2],
 313                          adapter->product_info.fw_version[1] >> 8,
 314                          adapter->product_info.fw_version[1] & 0x0f,
 315                          adapter->product_info.fw_version[0] >> 8,
 316                          adapter->product_info.fw_version[0] & 0x0f);
 317                 sprintf (adapter->bios_version, "%c%d%d.%d%d",
 318                          adapter->product_info.bios_version[2],
 319                          adapter->product_info.bios_version[1] >> 8,
 320                          adapter->product_info.bios_version[1] & 0x0f,
 321                          adapter->product_info.bios_version[0] >> 8,
 322                          adapter->product_info.bios_version[0] & 0x0f);
 323         } else {
 324                 memcpy(adapter->fw_version,
 325                                 (char *)adapter->product_info.fw_version, 4);
 326                 adapter->fw_version[4] = 0;
 327
 328                 memcpy(adapter->bios_version,
 329                                 (char *)adapter->product_info.bios_version, 4);
 330
 331                 adapter->bios_version[4] = 0;
 332         }
 333
 334         printk(KERN_NOTICE "megaraid: [%s:%s] detected %d logical drives.\n",
 335                 adapter->fw_version, adapter->bios_version, adapter->numldrv);
 336
 337         /*
 338          * Do we support extended (>10 bytes) cdbs
 339          */
 340         adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
 341         if (adapter->support_ext_cdb)
 342                 printk(KERN_NOTICE "megaraid: supports extended CDBs.\n");
 343
 344
 345         return 0;
 346 }
 347
 348 /**
 349  * mega_runpendq()
 350  * @adapter - pointer to our soft state
 351  *
 352  * Runs through the list of pending requests.
 353  */
 354 static inline void
 355 mega_runpendq(adapter_t *adapter)
 356 {
 357         if(!list_empty(&adapter->pending_list))
 358                 __mega_runpendq(adapter);
 359 }
 360
 361 /*
 362  * megaraid_queue()
 363  * @scmd - Issue this scsi command
 364  * @done - the callback hook into the scsi mid-layer
 365  *
 366  * The command queuing entry point for the mid-layer.
 367  */
 368 static int
 369 megaraid_queue_lck(Scsi_Cmnd *scmd, void (*done)(Scsi_Cmnd *))
 370 {
 371         adapter_t       *adapter;
 372         scb_t   *scb;
 373         int     busy=0;
 374         unsigned long flags;
 375
 376         adapter = (adapter_t *)scmd->device->host->hostdata;
 377
 378         scmd->scsi_done = done;
 379
 380
 381         /*
 382          * Allocate and build a SCB request
 383          * busy flag will be set if mega_build_cmd() command could not
 384          * allocate scb. We will return non-zero status in that case.
 385          * NOTE: scb can be null even though certain commands completed
 386          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, we would
 387          * return 0 in that case.
 388          */
 389
 390         spin_lock_irqsave(&adapter->lock, flags);
 391         scb = mega_build_cmd(adapter, scmd, &busy);
 392         if (!scb)
 393                 goto out;
 394
 395         scb->state |= SCB_PENDQ;
 396         list_add_tail(&scb->list, &adapter->pending_list);
 397
 398         /*
 399          * Check if the HBA is in quiescent state, e.g., during a
 400          * delete logical drive opertion. If it is, don't run
 401          * the pending_list.
 402          */
 403         if (atomic_read(&adapter->quiescent) == 0)
 404                 mega_runpendq(adapter);
 405
 406         busy = 0;
 407  out:
 408         spin_unlock_irqrestore(&adapter->lock, flags);
 409         return busy;
 410 }
 411
 412 static DEF_SCSI_QCMD(megaraid_queue)
 413
 414 /**
 415  * mega_allocate_scb()
 416  * @adapter - pointer to our soft state
 417  * @cmd - scsi command from the mid-layer
 418  *
 419  * Allocate a SCB structure. This is the central structure for controller
 420  * commands.
 421  */
 422 static inline scb_t *
 423 mega_allocate_scb(adapter_t *adapter, Scsi_Cmnd *cmd)
 424 {
 425         struct list_head *head = &adapter->free_list;
 426         scb_t   *scb;
 427
 428         /* Unlink command from Free List */
 429         if( !list_empty(head) ) {
 430
 431                 scb = list_entry(head->next, scb_t, list);
 432
 433                 list_del_init(head->next);
 434
 435                 scb->state = SCB_ACTIVE;
 436                 scb->cmd = cmd;
 437                 scb->dma_type = MEGA_DMA_TYPE_NONE;
 438
 439                 return scb;
 440         }
 441
 442         return NULL;
 443 }
 444
 445 /**
 446  * mega_get_ldrv_num()
 447  * @adapter - pointer to our soft state
 448  * @cmd - scsi mid layer command
 449  * @channel - channel on the controller
 450  *
 451  * Calculate the logical drive number based on the information in scsi command
 452  * and the channel number.
 453  */
 454 static inline int
 455 mega_get_ldrv_num(adapter_t *adapter, Scsi_Cmnd *cmd, int channel)
 456 {
 457         int             tgt;
 458         int             ldrv_num;
 459
 460         tgt = cmd->device->id;
 461
 462         if ( tgt > adapter->this_id )
 463                 tgt--;  /* we do not get inquires for initiator id */
 464
 465         ldrv_num = (channel * 15) + tgt;
 466
 467
 468         /*
 469          * If we have a logical drive with boot enabled, project it first
 470          */
 471         if( adapter->boot_ldrv_enabled ) {
 472                 if( ldrv_num == 0 ) {
 473                         ldrv_num = adapter->boot_ldrv;
 474                 }
 475                 else {
 476                         if( ldrv_num <= adapter->boot_ldrv ) {
 477                                 ldrv_num--;
 478                         }
 479                 }
 480         }
 481
 482         /*
 483          * If "delete logical drive" feature is enabled on this controller.
 484          * Do only if at least one delete logical drive operation was done.
 485          *
 486          * Also, after logical drive deletion, instead of logical drive number,
 487          * the value returned should be 0x80+logical drive id.
 488          *
 489          * These is valid only for IO commands.
 490          */
 491
 492         if (adapter->support_random_del && adapter->read_ldidmap )
 493                 switch (cmd->cmnd[0]) {
 494                 case READ_6:    /* fall through */
 495                 case WRITE_6:   /* fall through */
 496                 case READ_10:   /* fall through */
 497                 case WRITE_10:
 498                         ldrv_num += 0x80;
 499                 }
 500
 501         return ldrv_num;
 502 }
 503
 504 /**
 505  * mega_build_cmd()
 506  * @adapter - pointer to our soft state
 507  * @cmd - Prepare using this scsi command
 508  * @busy - busy flag if no resources
 509  *
 510  * Prepares a command and scatter gather list for the controller. This routine
 511  * also finds out if the commands is intended for a logical drive or a
 512  * physical device and prepares the controller command accordingly.
 513  *
 514  * We also re-order the logical drives and physical devices based on their
 515  * boot settings.
 516  */
 517 static scb_t *
 518 mega_build_cmd(adapter_t *adapter, Scsi_Cmnd *cmd, int *busy)
 519 {
 520         mega_ext_passthru       *epthru;
 521         mega_passthru   *pthru;
 522         scb_t   *scb;
 523         mbox_t  *mbox;
 524         long    seg;
 525         char    islogical;
 526         int     max_ldrv_num;
 527         int     channel = 0;
 528         int     target = 0;
 529         int     ldrv_num = 0;   /* logical drive number */
 530
 531
 532         /*
 533          * filter the internal and ioctl commands
 534          */
 535         if((cmd->cmnd[0] == MEGA_INTERNAL_CMD))
 536                 return (scb_t *)cmd->host_scribble;
 537
 538         /*
 539          * We know what channels our logical drives are on - mega_find_card()
 540          */
 541         islogical = adapter->logdrv_chan[cmd->device->channel];
 542
 543         /*
 544          * The theory: If physical drive is chosen for boot, all the physical
 545          * devices are exported before the logical drives, otherwise physical
 546          * devices are pushed after logical drives, in which case - Kernel sees
 547          * the physical devices on virtual channel which is obviously converted
 548          * to actual channel on the HBA.
 549          */
 550         if( adapter->boot_pdrv_enabled ) {
 551                 if( islogical ) {
 552                         /* logical channel */
 553                         channel = cmd->device->channel -
 554                                 adapter->product_info.nchannels;
 555                 }
 556                 else {
 557                         /* this is physical channel */
 558                         channel = cmd->device->channel;
 559                         target = cmd->device->id;
 560
 561                         /*
 562                          * boot from a physical disk, that disk needs to be
 563                          * exposed first IF both the channels are SCSI, then
 564                          * booting from the second channel is not allowed.
 565                          */
 566                         if( target == 0 ) {
 567                                 target = adapter->boot_pdrv_tgt;
 568                         }
 569                         else if( target == adapter->boot_pdrv_tgt ) {
 570                                 target = 0;
 571                         }
 572                 }
 573         }
 574         else {
 575                 if( islogical ) {
 576                         /* this is the logical channel */
 577                         channel = cmd->device->channel;
 578                 }
 579                 else {
 580                         /* physical channel */
 581                         channel = cmd->device->channel - NVIRT_CHAN;
 582                         target = cmd->device->id;
 583                 }
 584         }
 585
 586
 587         if(islogical) {
 588
 589                 /* have just LUN 0 for each target on virtual channels */
 590                 if (cmd->device->lun) {
 591                         cmd->result = (DID_BAD_TARGET << 16);
 592                         cmd->scsi_done(cmd);
 593                         return NULL;
 594                 }
 595
 596                 ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);
 597
 598
 599                 max_ldrv_num = (adapter->flag & BOARD_40LD) ?
 600                         MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;
 601
 602                 /*
 603                  * max_ldrv_num increases by 0x80 if some logical drive was
 604                  * deleted.
 605                  */
 606                 if(adapter->read_ldidmap)
 607                         max_ldrv_num += 0x80;
 608
 609                 if(ldrv_num > max_ldrv_num ) {
 610                         cmd->result = (DID_BAD_TARGET << 16);
 611                         cmd->scsi_done(cmd);
 612                         return NULL;
 613                 }
 614
 615         }
 616         else {
 617                 if( cmd->device->lun > 7) {
 618                         /*
 619                          * Do not support lun >7 for physically accessed
 620                          * devices
 621                          */
 622                         cmd->result = (DID_BAD_TARGET << 16);
 623                         cmd->scsi_done(cmd);
 624                         return NULL;
 625                 }
 626         }
 627
 628         /*
 629          *
 630          * Logical drive commands
 631          *
 632          */
 633         if(islogical) {
 634                 switch (cmd->cmnd[0]) {
 635                 case TEST_UNIT_READY:
 636 #if MEGA_HAVE_CLUSTERING
 637                         /*
 638                          * Do we support clustering and is the support enabled
 639                          * If no, return success always
 640                          */
 641                         if( !adapter->has_cluster ) {
 642                                 cmd->result = (DID_OK << 16);
 643                                 cmd->scsi_done(cmd);
 644                                 return NULL;
 645                         }
 646
 647                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 648                                 *busy = 1;
 649                                 return NULL;
 650                         }
 651
 652                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 653                         scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
 654                         scb->raw_mbox[3] = ldrv_num;
 655
 656                         scb->dma_direction = PCI_DMA_NONE;
 657
 658                         return scb;
 659 #else
 660                         cmd->result = (DID_OK << 16);
 661                         cmd->scsi_done(cmd);
 662                         return NULL;
 663 #endif
 664
 665                 case MODE_SENSE: {
 666                         char *buf;
 667                         struct scatterlist *sg;
 668
 669                         sg = scsi_sglist(cmd);
 670                         buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
 671
 672                         memset(buf, 0, cmd->cmnd[4]);
 673                         kunmap_atomic(buf - sg->offset, KM_IRQ0);
 674
 675                         cmd->result = (DID_OK << 16);
 676                         cmd->scsi_done(cmd);
 677                         return NULL;
 678                 }
 679
 680                 case READ_CAPACITY:
 681                 case INQUIRY:
 682
 683                         if(!(adapter->flag & (1L << cmd->device->channel))) {
 684
 685                                 printk(KERN_NOTICE
 686                                         "scsi%d: scanning scsi channel %d ",
 687                                                 adapter->host->host_no,
 688                                                 cmd->device->channel);
 689                                 printk("for logical drives.\n");
 690
 691                                 adapter->flag |= (1L << cmd->device->channel);
 692                         }
 693
 694                         /* Allocate a SCB and initialize passthru */
 695                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 696                                 *busy = 1;
 697                                 return NULL;
 698                         }
 699                         pthru = scb->pthru;
 700
 701                         mbox = (mbox_t *)scb->raw_mbox;
 702                         memset(mbox, 0, sizeof(scb->raw_mbox));
 703                         memset(pthru, 0, sizeof(mega_passthru));
 704
 705                         pthru->timeout = 0;
 706                         pthru->ars = 1;
 707                         pthru->reqsenselen = 14;
 708                         pthru->islogical = 1;
 709                         pthru->logdrv = ldrv_num;
 710                         pthru->cdblen = cmd->cmd_len;
 711                         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 712
 713                         if( adapter->has_64bit_addr ) {
 714                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 715                         }
 716                         else {
 717                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 718                         }
 719
 720                         scb->dma_direction = PCI_DMA_FROMDEVICE;
 721
 722                         pthru->numsgelements = mega_build_sglist(adapter, scb,
 723                                 &pthru->dataxferaddr, &pthru->dataxferlen);
 724
 725                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 726
 727                         return scb;
 728
 729                 case READ_6:
 730                 case WRITE_6:
 731                 case READ_10:
 732                 case WRITE_10:
 733                 case READ_12:
 734                 case WRITE_12:
 735
 736                         /* Allocate a SCB and initialize mailbox */
 737                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 738                                 *busy = 1;
 739                                 return NULL;
 740                         }
 741                         mbox = (mbox_t *)scb->raw_mbox;
 742
 743                         memset(mbox, 0, sizeof(scb->raw_mbox));
 744                         mbox->m_out.logdrv = ldrv_num;
 745
 746                         /*
 747                          * A little hack: 2nd bit is zero for all scsi read
 748                          * commands and is set for all scsi write commands
 749                          */
 750                         if( adapter->has_64bit_addr ) {
 751                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 752                                         MEGA_MBOXCMD_LWRITE64:
 753                                         MEGA_MBOXCMD_LREAD64 ;
 754                         }
 755                         else {
 756                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 757                                         MEGA_MBOXCMD_LWRITE:
 758                                         MEGA_MBOXCMD_LREAD ;
 759                         }
 760
 761                         /*
 762                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
 763                          */
 764                         if( cmd->cmd_len == 6 ) {
 765                                 mbox->m_out.numsectors = (u32) cmd->cmnd[4];
 766                                 mbox->m_out.lba =
 767                                         ((u32)cmd->cmnd[1] << 16) |
 768                                         ((u32)cmd->cmnd[2] << 8) |
 769                                         (u32)cmd->cmnd[3];
 770
 771                                 mbox->m_out.lba &= 0x1FFFFF;
 772
 773 #if MEGA_HAVE_STATS
 774                                 /*
 775                                  * Take modulo 0x80, since the logical drive
 776                                  * number increases by 0x80 when a logical
 777                                  * drive was deleted
 778                                  */
 779                                 if (*cmd->cmnd == READ_6) {
 780                                         adapter->nreads[ldrv_num%0x80]++;
 781                                         adapter->nreadblocks[ldrv_num%0x80] +=
 782                                                 mbox->m_out.numsectors;
 783                                 } else {
 784                                         adapter->nwrites[ldrv_num%0x80]++;
 785                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 786                                                 mbox->m_out.numsectors;
 787                                 }
 788 #endif
 789                         }
 790
 791                         /*
 792                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
 793                          */
 794                         if( cmd->cmd_len == 10 ) {
 795                                 mbox->m_out.numsectors =
 796                                         (u32)cmd->cmnd[8] |
 797                                         ((u32)cmd->cmnd[7] << 8);
 798                                 mbox->m_out.lba =
 799                                         ((u32)cmd->cmnd[2] << 24) |
 800                                         ((u32)cmd->cmnd[3] << 16) |
 801                                         ((u32)cmd->cmnd[4] << 8) |
 802                                         (u32)cmd->cmnd[5];
 803
 804 #if MEGA_HAVE_STATS
 805                                 if (*cmd->cmnd == READ_10) {
 806                                         adapter->nreads[ldrv_num%0x80]++;
 807                                         adapter->nreadblocks[ldrv_num%0x80] +=
 808                                                 mbox->m_out.numsectors;
 809                                 } else {
 810                                         adapter->nwrites[ldrv_num%0x80]++;
 811                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 812                                                 mbox->m_out.numsectors;
 813                                 }
 814 #endif
 815                         }
 816
 817                         /*
 818                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
 819                          */
 820                         if( cmd->cmd_len == 12 ) {
 821                                 mbox->m_out.lba =
 822                                         ((u32)cmd->cmnd[2] << 24) |
 823                                         ((u32)cmd->cmnd[3] << 16) |
 824                                         ((u32)cmd->cmnd[4] << 8) |
 825                                         (u32)cmd->cmnd[5];
 826
 827                                 mbox->m_out.numsectors =
 828                                         ((u32)cmd->cmnd[6] << 24) |
 829                                         ((u32)cmd->cmnd[7] << 16) |
 830                                         ((u32)cmd->cmnd[8] << 8) |
 831                                         (u32)cmd->cmnd[9];
 832
 833 #if MEGA_HAVE_STATS
 834                                 if (*cmd->cmnd == READ_12) {
 835                                         adapter->nreads[ldrv_num%0x80]++;
 836                                         adapter->nreadblocks[ldrv_num%0x80] +=
 837                                                 mbox->m_out.numsectors;
 838                                 } else {
 839                                         adapter->nwrites[ldrv_num%0x80]++;
 840                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 841                                                 mbox->m_out.numsectors;
 842                                 }
 843 #endif
 844                         }
 845
 846                         /*
 847                          * If it is a read command
 848                          */
 849                         if( (*cmd->cmnd & 0x0F) == 0x08 ) {
 850                                 scb->dma_direction = PCI_DMA_FROMDEVICE;
 851                         }
 852                         else {
 853                                 scb->dma_direction = PCI_DMA_TODEVICE;
 854                         }
 855
 856                         /* Calculate Scatter-Gather info */
 857                         mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
 858                                         (u32 *)&mbox->m_out.xferaddr, (u32 *)&seg);
 859
 860                         return scb;
 861
 862 #if MEGA_HAVE_CLUSTERING
 863                 case RESERVE:   /* Fall through */
 864                 case RELEASE:
 865
 866                         /*
 867                          * Do we support clustering and is the support enabled
 868                          */
 869                         if( ! adapter->has_cluster ) {
 870
 871                                 cmd->result = (DID_BAD_TARGET << 16);
 872                                 cmd->scsi_done(cmd);
 873                                 return NULL;
 874                         }
 875
 876                         /* Allocate a SCB and initialize mailbox */
 877                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 878                                 *busy = 1;
 879                                 return NULL;
 880                         }
 881
 882                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 883                         scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
 884                                 MEGA_RESERVE_LD : MEGA_RELEASE_LD;
 885
 886                         scb->raw_mbox[3] = ldrv_num;
 887
 888                         scb->dma_direction = PCI_DMA_NONE;
 889
 890                         return scb;
 891 #endif
 892
 893                 default:
 894                         cmd->result = (DID_BAD_TARGET << 16);
 895                         cmd->scsi_done(cmd);
 896                         return NULL;
 897                 }
 898         }
 899
 900         /*
 901          * Passthru drive commands
 902          */
 903         else {
 904                 /* Allocate a SCB and initialize passthru */
 905                 if(!(scb = mega_allocate_scb(adapter, cmd))) {
 906                         *busy = 1;
 907                         return NULL;
 908                 }
 909
 910                 mbox = (mbox_t *)scb->raw_mbox;
 911                 memset(mbox, 0, sizeof(scb->raw_mbox));
 912
 913                 if( adapter->support_ext_cdb ) {
 914
 915                         epthru = mega_prepare_extpassthru(adapter, scb, cmd,
 916                                         channel, target);
 917
 918                         mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;
 919
 920                         mbox->m_out.xferaddr = scb->epthru_dma_addr;
 921
 922                 }
 923                 else {
 924
 925                         pthru = mega_prepare_passthru(adapter, scb, cmd,
 926                                         channel, target);
 927
 928                         /* Initialize mailbox */
 929                         if( adapter->has_64bit_addr ) {
 930                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 931                         }
 932                         else {
 933                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 934                         }
 935
 936                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 937
 938                 }
 939                 return scb;
 940         }
 941         return NULL;
 942 }
 943
 944
 945 /**
 946  * mega_prepare_passthru()
 947  * @adapter - pointer to our soft state
 948  * @scb - our scsi control block
 949  * @cmd - scsi command from the mid-layer
 950  * @channel - actual channel on the controller
 951  * @target - actual id on the controller.
 952  *
 953  * prepare a command for the scsi physical devices.
 954  */
 955 static mega_passthru *
 956 mega_prepare_passthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
 957                 int channel, int target)
 958 {
 959         mega_passthru *pthru;
 960
 961         pthru = scb->pthru;
 962         memset(pthru, 0, sizeof (mega_passthru));
 963
 964         /* 0=6sec/1=60sec/2=10min/3=3hrs */
 965         pthru->timeout = 2;
 966
 967         pthru->ars = 1;
 968         pthru->reqsenselen = 14;
 969         pthru->islogical = 0;
 970
 971         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
 972
 973         pthru->target = (adapter->flag & BOARD_40LD) ?
 974                 (channel << 4) | target : target;
 975
 976         pthru->cdblen = cmd->cmd_len;
 977         pthru->logdrv = cmd->device->lun;
 978
 979         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 980
 981         /* Not sure about the direction */
 982         scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
 983
 984         /* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
 985         switch (cmd->cmnd[0]) {
 986         case INQUIRY:
 987         case READ_CAPACITY:
 988                 if(!(adapter->flag & (1L << cmd->device->channel))) {
 989
 990                         printk(KERN_NOTICE
 991                                 "scsi%d: scanning scsi channel %d [P%d] ",
 992                                         adapter->host->host_no,
 993                                         cmd->device->channel, channel);
 994                         printk("for physical devices.\n");
 995
 996                         adapter->flag |= (1L << cmd->device->channel);
 997                 }
 998                 /* Fall through */
 999         default:
1000                 pthru->numsgelements = mega_build_sglist(adapter, scb,
1001                                 &pthru->dataxferaddr, &pthru->dataxferlen);
1002                 break;
1003         }
1004         return pthru;
1005 }
1006
1007
1008 /**
1009  * mega_prepare_extpassthru()
1010  * @adapter - pointer to our soft state
1011  * @scb - our scsi control block
1012  * @cmd - scsi command from the mid-layer
1013  * @channel - actual channel on the controller
1014  * @target - actual id on the controller.
1015  *
1016  * prepare a command for the scsi physical devices. This rountine prepares
1017  * commands for devices which can take extended CDBs (>10 bytes)
1018  */
1019 static mega_ext_passthru *
1020 mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
1021                 int channel, int target)
1022 {
1023         mega_ext_passthru       *epthru;
1024
1025         epthru = scb->epthru;
1026         memset(epthru, 0, sizeof(mega_ext_passthru));
1027
1028         /* 0=6sec/1=60sec/2=10min/3=3hrs */
1029         epthru->timeout = 2;
1030
1031         epthru->ars = 1;
1032         epthru->reqsenselen = 14;
1033         epthru->islogical = 0;
1034
1035         epthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
1036         epthru->target = (adapter->flag & BOARD_40LD) ?
1037                 (channel << 4) | target : target;
1038
1039         epthru->cdblen = cmd->cmd_len;
1040         epthru->logdrv = cmd->device->lun;
1041
1042         memcpy(epthru->cdb, cmd->cmnd, cmd->cmd_len);
1043
1044         /* Not sure about the direction */
1045         scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
1046
1047         switch(cmd->cmnd[0]) {
1048         case INQUIRY:
1049         case READ_CAPACITY:
1050                 if(!(adapter->flag & (1L << cmd->device->channel))) {
1051
1052                         printk(KERN_NOTICE
1053                                 "scsi%d: scanning scsi channel %d [P%d] ",
1054                                         adapter->host->host_no,
1055                                         cmd->device->channel, channel);
1056                         printk("for physical devices.\n");
1057
1058                         adapter->flag |= (1L << cmd->device->channel);
1059                 }
1060                 /* Fall through */
1061         default:
1062                 epthru->numsgelements = mega_build_sglist(adapter, scb,
1063                                 &epthru->dataxferaddr, &epthru->dataxferlen);
1064                 break;
1065         }
1066
1067         return epthru;
1068 }
1069
1070 static void
1071 __mega_runpendq(adapter_t *adapter)
1072 {
1073         scb_t *scb;
1074         struct list_head *pos, *next;
1075
1076         /* Issue any pending commands to the card */
1077         list_for_each_safe(pos, next, &adapter->pending_list) {
1078
1079                 scb = list_entry(pos, scb_t, list);
1080
1081                 if( !(scb->state & SCB_ISSUED) ) {
1082
1083                         if( issue_scb(adapter, scb) != 0 )
1084                                 return;
1085                 }
1086         }
1087
1088         return;
1089 }
1090
1091
1092 /**
1093  * issue_scb()
1094  * @adapter - pointer to our soft state
1095  * @scb - scsi control block
1096  *
1097  * Post a command to the card if the mailbox is available, otherwise return
1098  * busy. We also take the scb from the pending list if the mailbox is
1099  * available.
1100  */
1101 static int
1102 issue_scb(adapter_t *adapter, scb_t *scb)
1103 {
1104         volatile mbox64_t       *mbox64 = adapter->mbox64;
1105         volatile mbox_t         *mbox = adapter->mbox;
1106         unsigned int    i = 0;
1107
1108         if(unlikely(mbox->m_in.busy)) {
1109                 do {
1110                         udelay(1);
1111                         i++;
1112                 } while( mbox->m_in.busy && (i < max_mbox_busy_wait) );
1113
1114                 if(mbox->m_in.busy) return -1;
1115         }
1116
1117         /* Copy mailbox data into host structure */
1118         memcpy((char *)&mbox->m_out, (char *)scb->raw_mbox,
1119                         sizeof(struct mbox_out));
1120
1121         mbox->m_out.cmdid = scb->idx;   /* Set cmdid */
1122         mbox->m_in.busy = 1;            /* Set busy */
1123
1124
1125         /*
1126          * Increment the pending queue counter
1127          */
1128         atomic_inc(&adapter->pend_cmds);
1129
1130         switch (mbox->m_out.cmd) {
1131         case MEGA_MBOXCMD_LREAD64:
1132         case MEGA_MBOXCMD_LWRITE64:
1133         case MEGA_MBOXCMD_PASSTHRU64:
1134         case MEGA_MBOXCMD_EXTPTHRU:
1135                 mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1136                 mbox64->xfer_segment_hi = 0;
1137                 mbox->m_out.xferaddr = 0xFFFFFFFF;
1138                 break;
1139         default:
1140                 mbox64->xfer_segment_lo = 0;
1141                 mbox64->xfer_segment_hi = 0;
1142         }
1143
1144         /*
1145          * post the command
1146          */
1147         scb->state |= SCB_ISSUED;
1148
1149         if( likely(adapter->flag & BOARD_MEMMAP) ) {
1150                 mbox->m_in.poll = 0;
1151                 mbox->m_in.ack = 0;
1152                 WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1153         }
1154         else {
1155                 irq_enable(adapter);
1156                 issue_command(adapter);
1157         }
1158
1159         return 0;
1160 }
1161
1162 /*
1163  * Wait until the controller's mailbox is available
1164  */
1165 static inline int
1166 mega_busywait_mbox (adapter_t *adapter)
1167 {
1168         if (adapter->mbox->m_in.busy)
1169                 return __mega_busywait_mbox(adapter);
1170         return 0;
1171 }
1172
1173 /**
1174  * issue_scb_block()
1175  * @adapter - pointer to our soft state
1176  * @raw_mbox - the mailbox
1177  *
1178  * Issue a scb in synchronous and non-interrupt mode
1179  */
1180 static int
1181 issue_scb_block(adapter_t *adapter, u_char *raw_mbox)
1182 {
1183         volatile mbox64_t *mbox64 = adapter->mbox64;
1184         volatile mbox_t *mbox = adapter->mbox;
1185         u8      byte;
1186
1187         /* Wait until mailbox is free */
1188         if(mega_busywait_mbox (adapter))
1189                 goto bug_blocked_mailbox;
1190
1191         /* Copy mailbox data into host structure */
1192         memcpy((char *) mbox, raw_mbox, sizeof(struct mbox_out));
1193         mbox->m_out.cmdid = 0xFE;
1194         mbox->m_in.busy = 1;
1195
1196         switch (raw_mbox[0]) {
1197         case MEGA_MBOXCMD_LREAD64:
1198         case MEGA_MBOXCMD_LWRITE64:
1199         case MEGA_MBOXCMD_PASSTHRU64:
1200         case MEGA_MBOXCMD_EXTPTHRU:
1201                 mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1202                 mbox64->xfer_segment_hi = 0;
1203                 mbox->m_out.xferaddr = 0xFFFFFFFF;
1204                 break;
1205         default:
1206                 mbox64->xfer_segment_lo = 0;
1207                 mbox64->xfer_segment_hi = 0;
1208         }
1209
1210         if( likely(adapter->flag & BOARD_MEMMAP) ) {
1211                 mbox->m_in.poll = 0;
1212                 mbox->m_in.ack = 0;
1213                 mbox->m_in.numstatus = 0xFF;
1214                 mbox->m_in.status = 0xFF;
1215                 WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1216
1217                 while((volatile u8)mbox->m_in.numstatus == 0xFF)
1218                         cpu_relax();
1219
1220                 mbox->m_in.numstatus = 0xFF;
1221
1222                 while( (volatile u8)mbox->m_in.poll != 0x77 )
1223                         cpu_relax();
1224
1225                 mbox->m_in.poll = 0;
1226                 mbox->m_in.ack = 0x77;
1227
1228                 WRINDOOR(adapter, adapter->mbox_dma | 0x2);
1229
1230                 while(RDINDOOR(adapter) & 0x2)
1231                         cpu_relax();
1232         }
1233         else {
1234                 irq_disable(adapter);
1235                 issue_command(adapter);
1236
1237                 while (!((byte = irq_state(adapter)) & INTR_VALID))
1238                         cpu_relax();
1239
1240                 set_irq_state(adapter, byte);
1241                 irq_enable(adapter);
1242                 irq_ack(adapter);
1243         }
1244
1245         return mbox->m_in.status;
1246
1247 bug_blocked_mailbox:
1248         printk(KERN_WARNING "megaraid: Blocked mailbox......!!\n");
1249         udelay (1000);
1250         return -1;
1251 }
1252
1253
1254 /**
1255  * megaraid_isr_iomapped()
1256  * @irq - irq
1257  * @devp - pointer to our soft state
1258  *
1259  * Interrupt service routine for io-mapped controllers.
1260  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1261  * and service the completed commands.
1262  */
1263 static irqreturn_t
1264 megaraid_isr_iomapped(int irq, void *devp)
1265 {
1266         adapter_t       *adapter = devp;
1267         unsigned long   flags;
1268         u8      status;
1269         u8      nstatus;
1270         u8      completed[MAX_FIRMWARE_STATUS];
1271         u8      byte;
1272         int     handled = 0;
1273
1274
1275         /*
1276          * loop till F/W has more commands for us to complete.
1277          */
1278         spin_lock_irqsave(&adapter->lock, flags);
1279
1280         do {
1281                 /* Check if a valid interrupt is pending */
1282                 byte = irq_state(adapter);
1283                 if( (byte & VALID_INTR_BYTE) == 0 ) {
1284                         /*
1285                          * No more pending commands
1286                          */
1287                         goto out_unlock;
1288                 }
1289                 set_irq_state(adapter, byte);
1290
1291                 while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1292                                 == 0xFF)
1293                         cpu_relax();
1294                 adapter->mbox->m_in.numstatus = 0xFF;
1295
1296                 status = adapter->mbox->m_in.status;
1297
1298                 /*
1299                  * decrement the pending queue counter
1300                  */
1301                 atomic_sub(nstatus, &adapter->pend_cmds);
1302
1303                 memcpy(completed, (void *)adapter->mbox->m_in.completed,
1304                                 nstatus);
1305
1306                 /* Acknowledge interrupt */
1307                 irq_ack(adapter);
1308
1309                 mega_cmd_done(adapter, completed, nstatus, status);
1310
1311                 mega_rundoneq(adapter);
1312
1313                 handled = 1;
1314
1315                 /* Loop through any pending requests */
1316                 if(atomic_read(&adapter->quiescent) == 0) {
1317                         mega_runpendq(adapter);
1318                 }
1319
1320         } while(1);
1321
1322  out_unlock:
1323
1324         spin_unlock_irqrestore(&adapter->lock, flags);
1325
1326         return IRQ_RETVAL(handled);
1327 }
1328
1329
1330 /**
1331  * megaraid_isr_memmapped()
1332  * @irq - irq
1333  * @devp - pointer to our soft state
1334  *
1335  * Interrupt service routine for memory-mapped controllers.
1336  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1337  * and service the completed commands.
1338  */
1339 static irqreturn_t
1340 megaraid_isr_memmapped(int irq, void *devp)
1341 {
1342         adapter_t       *adapter = devp;
1343         unsigned long   flags;
1344         u8      status;
1345         u32     dword = 0;
1346         u8      nstatus;
1347         u8      completed[MAX_FIRMWARE_STATUS];
1348         int     handled = 0;
1349
1350
1351         /*
1352          * loop till F/W has more commands for us to complete.
1353          */
1354         spin_lock_irqsave(&adapter->lock, flags);
1355
1356         do {
1357                 /* Check if a valid interrupt is pending */
1358                 dword = RDOUTDOOR(adapter);
1359                 if(dword != 0x10001234) {
1360                         /*
1361                          * No more pending commands
1362                          */
1363                         goto out_unlock;
1364                 }
1365                 WROUTDOOR(adapter, 0x10001234);
1366
1367                 while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1368                                 == 0xFF) {
1369                         cpu_relax();
1370                 }
1371                 adapter->mbox->m_in.numstatus = 0xFF;
1372
1373                 status = adapter->mbox->m_in.status;
1374
1375                 /*
1376                  * decrement the pending queue counter
1377                  */
1378                 atomic_sub(nstatus, &adapter->pend_cmds);
1379
1380                 memcpy(completed, (void *)adapter->mbox->m_in.completed,
1381                                 nstatus);
1382
1383                 /* Acknowledge interrupt */
1384                 WRINDOOR(adapter, 0x2);
1385
1386                 handled = 1;
1387
1388                 while( RDINDOOR(adapter) & 0x02 )
1389                         cpu_relax();
1390
1391                 mega_cmd_done(adapter, completed, nstatus, status);
1392
1393                 mega_rundoneq(adapter);
1394
1395                 /* Loop through any pending requests */
1396                 if(atomic_read(&adapter->quiescent) == 0) {
1397                         mega_runpendq(adapter);
1398                 }
1399
1400         } while(1);
1401
1402  out_unlock:
1403
1404         spin_unlock_irqrestore(&adapter->lock, flags);
1405
1406         return IRQ_RETVAL(handled);
1407 }
1408 /**
1409  * mega_cmd_done()
1410  * @adapter - pointer to our soft state
1411  * @completed - array of ids of completed commands
1412  * @nstatus - number of completed commands
1413  * @status - status of the last command completed
1414  *
1415  * Complete the commands and call the scsi mid-layer callback hooks.
1416  */
1417 static void
1418 mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status)
1419 {
1420         mega_ext_passthru       *epthru = NULL;
1421         struct scatterlist      *sgl;
1422         Scsi_Cmnd       *cmd = NULL;
1423         mega_passthru   *pthru = NULL;
1424         mbox_t  *mbox = NULL;
1425         u8      c;
1426         scb_t   *scb;
1427         int     islogical;
1428         int     cmdid;
1429         int     i;
1430
1431         /*
1432          * for all the commands completed, call the mid-layer callback routine
1433          * and free the scb.
1434          */
1435         for( i = 0; i < nstatus; i++ ) {
1436
1437                 cmdid = completed[i];
1438
1439                 if( cmdid == CMDID_INT_CMDS ) { /* internal command */
1440                         scb = &adapter->int_scb;
1441                         cmd = scb->cmd;
1442                         mbox = (mbox_t *)scb->raw_mbox;
1443
1444                         /*
1445                          * Internal command interface do not fire the extended
1446                          * passthru or 64-bit passthru
1447                          */
1448                         pthru = scb->pthru;
1449
1450                 }
1451                 else {
1452                         scb = &adapter->scb_list[cmdid];
1453
1454                         /*
1455                          * Make sure f/w has completed a valid command
1456                          */
1457                         if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
1458                                 printk(KERN_CRIT
1459                                         "megaraid: invalid command ");
1460                                 printk("Id %d, scb->state:%x, scsi cmd:%p\n",
1461                                         cmdid, scb->state, scb->cmd);
1462
1463                                 continue;
1464                         }
1465
1466                         /*
1467                          * Was a abort issued for this command
1468                          */
1469                         if( scb->state & SCB_ABORT ) {
1470
1471                                 printk(KERN_WARNING
1472                                 "megaraid: aborted cmd [%x] complete.\n",
1473                                         scb->idx);
1474
1475                                 scb->cmd->result = (DID_ABORT << 16);
1476
1477                                 list_add_tail(SCSI_LIST(scb->cmd),
1478                                                 &adapter->completed_list);
1479
1480                                 mega_free_scb(adapter, scb);
1481
1482                                 continue;
1483                         }
1484
1485                         /*
1486                          * Was a reset issued for this command
1487                          */
1488                         if( scb->state & SCB_RESET ) {
1489
1490                                 printk(KERN_WARNING
1491                                 "megaraid: reset cmd [%x] complete.\n",
1492                                         scb->idx);
1493
1494                                 scb->cmd->result = (DID_RESET << 16);
1495
1496                                 list_add_tail(SCSI_LIST(scb->cmd),
1497                                                 &adapter->completed_list);
1498
1499                                 mega_free_scb (adapter, scb);
1500
1501                                 continue;
1502                         }
1503
1504                         cmd = scb->cmd;
1505                         pthru = scb->pthru;
1506                         epthru = scb->epthru;
1507                         mbox = (mbox_t *)scb->raw_mbox;
1508
1509 #if MEGA_HAVE_STATS
1510                         {
1511
1512                         int     logdrv = mbox->m_out.logdrv;
1513
1514                         islogical = adapter->logdrv_chan[cmd->channel];
1515                         /*
1516                          * Maintain an error counter for the logical drive.
1517                          * Some application like SNMP agent need such
1518                          * statistics
1519                          */
1520                         if( status && islogical && (cmd->cmnd[0] == READ_6 ||
1521                                                 cmd->cmnd[0] == READ_10 ||
1522                                                 cmd->cmnd[0] == READ_12)) {
1523                                 /*
1524                                  * Logical drive number increases by 0x80 when
1525                                  * a logical drive is deleted
1526                                  */
1527                                 adapter->rd_errors[logdrv%0x80]++;
1528                         }
1529
1530                         if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
1531                                                 cmd->cmnd[0] == WRITE_10 ||
1532                                                 cmd->cmnd[0] == WRITE_12)) {
1533                                 /*
1534                                  * Logical drive number increases by 0x80 when
1535                                  * a logical drive is deleted
1536                                  */
1537                                 adapter->wr_errors[logdrv%0x80]++;
1538                         }
1539
1540                         }
1541 #endif
1542                 }
1543
1544                 /*
1545                  * Do not return the presence of hard disk on the channel so,
1546                  * inquiry sent, and returned data==hard disk or removable
1547                  * hard disk and not logical, request should return failure! -
1548                  * PJ
1549                  */
1550                 islogical = adapter->logdrv_chan[cmd->device->channel];
1551                 if( cmd->cmnd[0] == INQUIRY && !islogical ) {
1552
1553                         sgl = scsi_sglist(cmd);
1554                         if( sg_page(sgl) ) {
1555                                 c = *(unsigned char *) sg_virt(&sgl[0]);
1556                         } else {
1557                                 printk(KERN_WARNING
1558                                        "megaraid: invalid sg.\n");
1559                                 c = 0;
1560                         }
1561
1562                         if(IS_RAID_CH(adapter, cmd->device->channel) &&
1563                                         ((c & 0x1F ) == TYPE_DISK)) {
1564                                 status = 0xF0;
1565                         }
1566                 }
1567
1568                 /* clear result; otherwise, success returns corrupt value */
1569                 cmd->result = 0;
1570
1571                 /* Convert MegaRAID status to Linux error code */
1572                 switch (status) {
1573                 case 0x00:      /* SUCCESS , i.e. SCSI_STATUS_GOOD */
1574                         cmd->result |= (DID_OK << 16);
1575                         break;
1576
1577                 case 0x02:      /* ERROR_ABORTED, i.e.
1578                                    SCSI_STATUS_CHECK_CONDITION */
1579
1580                         /* set sense_buffer and result fields */
1581                         if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
1582                                 mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
1583
1584                                 memcpy(cmd->sense_buffer, pthru->reqsensearea,
1585                                                 14);
1586
1587                                 cmd->result = (DRIVER_SENSE << 24) |
1588                                         (DID_OK << 16) |
1589                                         (CHECK_CONDITION << 1);
1590                         }
1591                         else {
1592                                 if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
1593
1594                                         memcpy(cmd->sense_buffer,
1595                                                 epthru->reqsensearea, 14);
1596
1597                                         cmd->result = (DRIVER_SENSE << 24) |
1598                                                 (DID_OK << 16) |
1599                                                 (CHECK_CONDITION << 1);
1600                                 } else {
1601                                         cmd->sense_buffer[0] = 0x70;
1602                                         cmd->sense_buffer[2] = ABORTED_COMMAND;
1603                                         cmd->result |= (CHECK_CONDITION << 1);
1604                                 }
1605                         }
1606                         break;
1607
1608                 case 0x08:      /* ERR_DEST_DRIVE_FAILED, i.e.
1609                                    SCSI_STATUS_BUSY */
1610                         cmd->result |= (DID_BUS_BUSY << 16) | status;
1611                         break;
1612
1613                 default:
1614 #if MEGA_HAVE_CLUSTERING
1615                         /*
1616                          * If TEST_UNIT_READY fails, we know
1617                          * MEGA_RESERVATION_STATUS failed
1618                          */
1619                         if( cmd->cmnd[0] == TEST_UNIT_READY ) {
1620                                 cmd->result |= (DID_ERROR << 16) |
1621                                         (RESERVATION_CONFLICT << 1);
1622                         }
1623                         else
1624                         /*
1625                          * Error code returned is 1 if Reserve or Release
1626                          * failed or the input parameter is invalid
1627                          */
1628                         if( status == 1 &&
1629                                 (cmd->cmnd[0] == RESERVE ||
1630                                          cmd->cmnd[0] == RELEASE) ) {
1631
1632                                 cmd->result |= (DID_ERROR << 16) |
1633                                         (RESERVATION_CONFLICT << 1);
1634                         }
1635                         else
1636 #endif
1637                                 cmd->result |= (DID_BAD_TARGET << 16)|status;
1638                 }
1639
1640                 /*
1641                  * Only free SCBs for the commands coming down from the
1642                  * mid-layer, not for which were issued internally
1643                  *
1644                  * For internal command, restore the status returned by the
1645                  * firmware so that user can interpret it.
1646                  */
1647                 if( cmdid == CMDID_INT_CMDS ) { /* internal command */
1648                         cmd->result = status;
1649
1650                         /*
1651                          * Remove the internal command from the pending list
1652                          */
1653                         list_del_init(&scb->list);
1654                         scb->state = SCB_FREE;
1655                 }
1656                 else {
1657                         mega_free_scb(adapter, scb);
1658                 }
1659
1660                 /* Add Scsi_Command to end of completed queue */
1661                 list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
1662         }
1663 }
1664
1665
1666 /*
1667  * mega_runpendq()
1668  *
1669  * Run through the list of completed requests and finish it
1670  */
1671 static void
1672 mega_rundoneq (adapter_t *adapter)
1673 {
1674         Scsi_Cmnd *cmd;
1675         struct list_head *pos;
1676
1677         list_for_each(pos, &adapter->completed_list) {
1678
1679                 struct scsi_pointer* spos = (struct scsi_pointer *)pos;
1680
1681                 cmd = list_entry(spos, Scsi_Cmnd, SCp);
1682                 cmd->scsi_done(cmd);
1683         }
1684
1685         INIT_LIST_HEAD(&adapter->completed_list);
1686 }
1687
1688
1689 /*
1690  * Free a SCB structure
1691  * Note: We assume the scsi commands associated with this scb is not free yet.
1692  */
1693 static void
1694 mega_free_scb(adapter_t *adapter, scb_t *scb)
1695 {
1696         switch( scb->dma_type ) {
1697
1698         case MEGA_DMA_TYPE_NONE:
1699                 break;
1700
1701         case MEGA_SGLIST:
1702                 scsi_dma_unmap(scb->cmd);
1703                 break;
1704         default:
1705                 break;
1706         }
1707
1708         /*
1709          * Remove from the pending list
1710          */
1711         list_del_init(&scb->list);
1712
1713         /* Link the scb back into free list */
1714         scb->state = SCB_FREE;
1715         scb->cmd = NULL;
1716
1717         list_add(&scb->list, &adapter->free_list);
1718 }
1719
1720
1721 static int
1722 __mega_busywait_mbox (adapter_t *adapter)
1723 {
1724         volatile mbox_t *mbox = adapter->mbox;
1725         long counter;
1726
1727         for (counter = 0; counter < 10000; counter++) {
1728                 if (!mbox->m_in.busy)
1729                         return 0;
1730                 udelay(100);
1731                 cond_resched();
1732         }
1733         return -1;              /* give up after 1 second */
1734 }
1735
1736 /*
1737  * Copies data to SGLIST
1738  * Note: For 64 bit cards, we need a minimum of one SG element for read/write
1739  */
1740 static int
1741 mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
1742 {
1743         struct scatterlist *sg;
1744         Scsi_Cmnd       *cmd;
1745         int     sgcnt;
1746         int     idx;
1747
1748         cmd = scb->cmd;
1749
1750         /*
1751          * Copy Scatter-Gather list info into controller structure.
1752          *
1753          * The number of sg elements returned must not exceed our limit
1754          */
1755         sgcnt = scsi_dma_map(cmd);
1756
1757         scb->dma_type = MEGA_SGLIST;
1758
1759         BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);
1760
1761         *len = 0;
1762
1763         if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
1764                 sg = scsi_sglist(cmd);
1765                 scb->dma_h_bulkdata = sg_dma_address(sg);
1766                 *buf = (u32)scb->dma_h_bulkdata;
1767                 *len = sg_dma_len(sg);
1768                 return 0;
1769         }
1770
1771         scsi_for_each_sg(cmd, sg, sgcnt, idx) {
1772                 if (adapter->has_64bit_addr) {
1773                         scb->sgl64[idx].address = sg_dma_address(sg);
1774                         *len += scb->sgl64[idx].length = sg_dma_len(sg);
1775                 } else {
1776                         scb->sgl[idx].address = sg_dma_address(sg);
1777                         *len += scb->sgl[idx].length = sg_dma_len(sg);
1778                 }
1779         }
1780
1781         /* Reset pointer and length fields */
1782         *buf = scb->sgl_dma_addr;
1783
1784         /* Return count of SG requests */
1785         return sgcnt;
1786 }
1787
1788
1789 /*
1790  * mega_8_to_40ld()
1791  *
1792  * takes all info in AdapterInquiry structure and puts it into ProductInfo and
1793  * Enquiry3 structures for later use
1794  */
1795 static void
1796 mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
1797                 mega_product_info *product_info)
1798 {
1799         int i;
1800
1801         product_info->max_commands = inquiry->adapter_info.max_commands;
1802         enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
1803         product_info->nchannels = inquiry->adapter_info.nchannels;
1804
1805         for (i = 0; i < 4; i++) {
1806                 product_info->fw_version[i] =
1807                         inquiry->adapter_info.fw_version[i];
1808
1809                 product_info->bios_version[i] =
1810                         inquiry->adapter_info.bios_version[i];
1811         }
1812         enquiry3->cache_flush_interval =
1813                 inquiry->adapter_info.cache_flush_interval;
1814
1815         product_info->dram_size = inquiry->adapter_info.dram_size;
1816
1817         enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
1818
1819         for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
1820                 enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
1821                 enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
1822                 enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
1823         }
1824
1825         for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
1826                 enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
1827 }
1828
1829 static inline void
1830 mega_free_sgl(adapter_t *adapter)
1831 {
1832         scb_t   *scb;
1833         int     i;
1834
1835         for(i = 0; i < adapter->max_cmds; i++) {
1836
1837                 scb = &adapter->scb_list[i];
1838
1839                 if( scb->sgl64 ) {
1840                         pci_free_consistent(adapter->dev,
1841                                 sizeof(mega_sgl64) * adapter->sglen,
1842                                 scb->sgl64,
1843                                 scb->sgl_dma_addr);
1844
1845                         scb->sgl64 = NULL;
1846                 }
1847
1848                 if( scb->pthru ) {
1849                         pci_free_consistent(adapter->dev, sizeof(mega_passthru),
1850                                 scb->pthru, scb->pthru_dma_addr);
1851
1852                         scb->pthru = NULL;
1853                 }
1854
1855                 if( scb->epthru ) {
1856                         pci_free_consistent(adapter->dev,
1857                                 sizeof(mega_ext_passthru),
1858                                 scb->epthru, scb->epthru_dma_addr);
1859
1860                         scb->epthru = NULL;
1861                 }
1862
1863         }
1864 }
1865
1866
1867 /*
1868  * Get information about the card/driver
1869  */
1870 const char *
1871 megaraid_info(struct Scsi_Host *host)
1872 {
1873         static char buffer[512];
1874         adapter_t *adapter;
1875
1876         adapter = (adapter_t *)host->hostdata;
1877
1878         sprintf (buffer,
1879                  "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
1880                  adapter->fw_version, adapter->product_info.max_commands,
1881                  adapter->host->max_id, adapter->host->max_channel,
1882                  adapter->host->max_lun);
1883         return buffer;
1884 }
1885
1886 /*
1887  * Abort a previous SCSI request. Only commands on the pending list can be
1888  * aborted. All the commands issued to the F/W must complete.
1889  */
1890 static int
1891 megaraid_abort(Scsi_Cmnd *cmd)
1892 {
1893         adapter_t       *adapter;
1894         int             rval;
1895
1896         adapter = (adapter_t *)cmd->device->host->hostdata;
1897
1898         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
1899
1900         /*
1901          * This is required here to complete any completed requests
1902          * to be communicated over to the mid layer.
1903          */
1904         mega_rundoneq(adapter);
1905
1906         return rval;
1907 }
1908
1909
1910 static int
1911 megaraid_reset(struct scsi_cmnd *cmd)
1912 {
1913         adapter_t       *adapter;
1914         megacmd_t       mc;
1915         int             rval;
1916
1917         adapter = (adapter_t *)cmd->device->host->hostdata;
1918
1919 #if MEGA_HAVE_CLUSTERING
1920         mc.cmd = MEGA_CLUSTER_CMD;
1921         mc.opcode = MEGA_RESET_RESERVATIONS;
1922
1923         if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
1924                 printk(KERN_WARNING
1925                                 "megaraid: reservation reset failed.\n");
1926         }
1927         else {
1928                 printk(KERN_INFO "megaraid: reservation reset.\n");
1929         }
1930 #endif
1931
1932         spin_lock_irq(&adapter->lock);
1933
1934         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
1935
1936         /*
1937          * This is required here to complete any completed requests
1938          * to be communicated over to the mid layer.
1939          */
1940         mega_rundoneq(adapter);
1941         spin_unlock_irq(&adapter->lock);
1942
1943         return rval;
1944 }
1945
1946 /**
1947  * megaraid_abort_and_reset()
1948  * @adapter - megaraid soft state
1949  * @cmd - scsi command to be aborted or reset
1950  * @aor - abort or reset flag
1951  *
1952  * Try to locate the scsi command in the pending queue. If found and is not
1953  * issued to the controller, abort/reset it. Otherwise return failure
1954  */
1955 static int
1956 megaraid_abort_and_reset(adapter_t *adapter, Scsi_Cmnd *cmd, int aor)
1957 {
1958         struct list_head        *pos, *next;
1959         scb_t                   *scb;
1960
1961         printk(KERN_WARNING "megaraid: %s cmd=%x <c=%d t=%d l=%d>\n",
1962              (aor == SCB_ABORT)? "ABORTING":"RESET",
1963              cmd->cmnd[0], cmd->device->channel,
1964              cmd->device->id, cmd->device->lun);
1965
1966         if(list_empty(&adapter->pending_list))
1967                 return FAILED;
1968
1969         list_for_each_safe(pos, next, &adapter->pending_list) {
1970
1971                 scb = list_entry(pos, scb_t, list);
1972
1973                 if (scb->cmd == cmd) { /* Found command */
1974
1975                         scb->state |= aor;
1976
1977                         /*
1978                          * Check if this command has firmware ownership. If
1979                          * yes, we cannot reset this command. Whenever f/w
1980                          * completes this command, we will return appropriate
1981                          * status from ISR.
1982                          */
1983                         if( scb->state & SCB_ISSUED ) {
1984
1985                                 printk(KERN_WARNING
1986                                         "megaraid: %s[%x], fw owner.\n",
1987                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1988                                         scb->idx);
1989
1990                                 return FAILED;
1991                         }
1992                         else {
1993
1994                                 /*
1995                                  * Not yet issued! Remove from the pending
1996                                  * list
1997                                  */
1998                                 printk(KERN_WARNING
1999                                         "megaraid: %s-[%x], driver owner.\n",
2000                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
2001                                         scb->idx);
2002
2003                                 mega_free_scb(adapter, scb);
2004
2005                                 if( aor == SCB_ABORT ) {
2006                                         cmd->result = (DID_ABORT << 16);
2007                                 }
2008                                 else {
2009                                         cmd->result = (DID_RESET << 16);
2010                                 }
2011
2012                                 list_add_tail(SCSI_LIST(cmd),
2013                                                 &adapter->completed_list);
2014
2015                                 return SUCCESS;
2016                         }
2017                 }
2018         }
2019
2020         return FAILED;
2021 }
2022
2023 static inline int
2024 make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
2025 {
2026         *pdev = alloc_pci_dev();
2027
2028         if( *pdev == NULL ) return -1;
2029
2030         memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
2031
2032         if( pci_set_dma_mask(*pdev, DMA_BIT_MASK(32)) != 0 ) {
2033                 kfree(*pdev);
2034                 return -1;
2035         }
2036
2037         return 0;
2038 }
2039
2040 static inline void
2041 free_local_pdev(struct pci_dev *pdev)
2042 {
2043         kfree(pdev);
2044 }
2045
2046 /**
2047  * mega_allocate_inquiry()
2048  * @dma_handle - handle returned for dma address
2049  * @pdev - handle to pci device
2050  *
2051  * allocates memory for inquiry structure
2052  */
2053 static inline void *
2054 mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
2055 {
2056         return pci_alloc_consistent(pdev, sizeof(mega_inquiry3), dma_handle);
2057 }
2058
2059
2060 static inline void
2061 mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
2062 {
2063         pci_free_consistent(pdev, sizeof(mega_inquiry3), inquiry, dma_handle);
2064 }
2065
2066
2067 #ifdef CONFIG_PROC_FS
2068 /* Following code handles /proc fs  */
2069
2070 #define CREATE_READ_PROC(string, func)  create_proc_read_entry(string,  \
2071                                         S_IRUSR | S_IFREG,              \
2072                                         controller_proc_dir_entry,      \
2073                                         func, adapter)
2074
2075 /**
2076  * mega_create_proc_entry()
2077  * @index - index in soft state array
2078  * @parent - parent node for this /proc entry
2079  *
2080  * Creates /proc entries for our controllers.
2081  */
2082 static void
2083 mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2084 {
2085         struct proc_dir_entry   *controller_proc_dir_entry = NULL;
2086         u8              string[64] = { 0 };
2087         adapter_t       *adapter = hba_soft_state[index];
2088
2089         sprintf(string, "hba%d", adapter->host->host_no);
2090
2091         controller_proc_dir_entry =
2092                 adapter->controller_proc_dir_entry = proc_mkdir(string, parent);
2093
2094         if(!controller_proc_dir_entry) {
2095                 printk(KERN_WARNING "\nmegaraid: proc_mkdir failed\n");
2096                 return;
2097         }
2098         adapter->proc_read = CREATE_READ_PROC("config", proc_read_config);
2099         adapter->proc_stat = CREATE_READ_PROC("stat", proc_read_stat);
2100         adapter->proc_mbox = CREATE_READ_PROC("mailbox", proc_read_mbox);
2101 #if MEGA_HAVE_ENH_PROC
2102         adapter->proc_rr = CREATE_READ_PROC("rebuild-rate", proc_rebuild_rate);
2103         adapter->proc_battery = CREATE_READ_PROC("battery-status",
2104                         proc_battery);
2105
2106         /*
2107          * Display each physical drive on its channel
2108          */
2109         adapter->proc_pdrvstat[0] = CREATE_READ_PROC("diskdrives-ch0",
2110                                         proc_pdrv_ch0);
2111         adapter->proc_pdrvstat[1] = CREATE_READ_PROC("diskdrives-ch1",
2112                                         proc_pdrv_ch1);
2113         adapter->proc_pdrvstat[2] = CREATE_READ_PROC("diskdrives-ch2",
2114                                         proc_pdrv_ch2);
2115         adapter->proc_pdrvstat[3] = CREATE_READ_PROC("diskdrives-ch3",
2116                                         proc_pdrv_ch3);
2117
2118         /*
2119          * Display a set of up to 10 logical drive through each of following
2120          * /proc entries
2121          */
2122         adapter->proc_rdrvstat[0] = CREATE_READ_PROC("raiddrives-0-9",
2123                                         proc_rdrv_10);
2124         adapter->proc_rdrvstat[1] = CREATE_READ_PROC("raiddrives-10-19",
2125                                         proc_rdrv_20);
2126         adapter->proc_rdrvstat[2] = CREATE_READ_PROC("raiddrives-20-29",
2127                                         proc_rdrv_30);
2128         adapter->proc_rdrvstat[3] = CREATE_READ_PROC("raiddrives-30-39",
2129                                         proc_rdrv_40);
2130 #endif
2131 }
2132
2133
2134 /**
2135  * proc_read_config()
2136  * @page - buffer to write the data in
2137  * @start - where the actual data has been written in page
2138  * @offset - same meaning as the read system call
2139  * @count - same meaning as the read system call
2140  * @eof - set if no more data needs to be returned
2141  * @data - pointer to our soft state
2142  *
2143  * Display configuration information about the controller.
2144  */
2145 static int
2146 proc_read_config(char *page, char **start, off_t offset, int count, int *eof,
2147                 void *data)
2148 {
2149
2150         adapter_t *adapter = (adapter_t *)data;
2151         int len = 0;
2152
2153         len += sprintf(page+len, "%s", MEGARAID_VERSION);
2154
2155         if(adapter->product_info.product_name[0])
2156                 len += sprintf(page+len, "%s\n",
2157                                 adapter->product_info.product_name);
2158
2159         len += sprintf(page+len, "Controller Type: ");
2160
2161         if( adapter->flag & BOARD_MEMMAP ) {
2162                 len += sprintf(page+len,
2163                         "438/466/467/471/493/518/520/531/532\n");
2164         }
2165         else {
2166                 len += sprintf(page+len,
2167                         "418/428/434\n");
2168         }
2169
2170         if(adapter->flag & BOARD_40LD) {
2171                 len += sprintf(page+len,
2172                                 "Controller Supports 40 Logical Drives\n");
2173         }
2174
2175         if(adapter->flag & BOARD_64BIT) {
2176                 len += sprintf(page+len,
2177                 "Controller capable of 64-bit memory addressing\n");
2178         }
2179         if( adapter->has_64bit_addr ) {
2180                 len += sprintf(page+len,
2181                         "Controller using 64-bit memory addressing\n");
2182         }
2183         else {
2184                 len += sprintf(page+len,
2185                         "Controller is not using 64-bit memory addressing\n");
2186         }
2187
2188         len += sprintf(page+len, "Base = %08lx, Irq = %d, ", adapter->base,
2189                         adapter->host->irq);
2190
2191         len += sprintf(page+len, "Logical Drives = %d, Channels = %d\n",
2192                         adapter->numldrv, adapter->product_info.nchannels);
2193
2194         len += sprintf(page+len, "Version =%s:%s, DRAM = %dMb\n",
2195                         adapter->fw_version, adapter->bios_version,
2196                         adapter->product_info.dram_size);
2197
2198         len += sprintf(page+len,
2199                 "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
2200                 adapter->product_info.max_commands, adapter->max_cmds);
2201
2202         len += sprintf(page+len, "support_ext_cdb    = %d\n",
2203                         adapter->support_ext_cdb);
2204         len += sprintf(page+len, "support_random_del = %d\n",
2205                         adapter->support_random_del);
2206         len += sprintf(page+len, "boot_ldrv_enabled  = %d\n",
2207                         adapter->boot_ldrv_enabled);
2208         len += sprintf(page+len, "boot_ldrv          = %d\n",
2209                         adapter->boot_ldrv);
2210         len += sprintf(page+len, "boot_pdrv_enabled  = %d\n",
2211                         adapter->boot_pdrv_enabled);
2212         len += sprintf(page+len, "boot_pdrv_ch       = %d\n",
2213                         adapter->boot_pdrv_ch);
2214         len += sprintf(page+len, "boot_pdrv_tgt      = %d\n",
2215                         adapter->boot_pdrv_tgt);
2216         len += sprintf(page+len, "quiescent          = %d\n",
2217                         atomic_read(&adapter->quiescent));
2218         len += sprintf(page+len, "has_cluster        = %d\n",
2219                         adapter->has_cluster);
2220
2221         len += sprintf(page+len, "\nModule Parameters:\n");
2222         len += sprintf(page+len, "max_cmd_per_lun    = %d\n",
2223                         max_cmd_per_lun);
2224         len += sprintf(page+len, "max_sectors_per_io = %d\n",
2225                         max_sectors_per_io);
2226
2227         *eof = 1;
2228
2229         return len;
2230 }
2231
2232
2233
2234 /**
2235  * proc_read_stat()
2236  * @page - buffer to write the data in
2237  * @start - where the actual data has been written in page
2238  * @offset - same meaning as the read system call
2239  * @count - same meaning as the read system call
2240  * @eof - set if no more data needs to be returned
2241  * @data - pointer to our soft state
2242  *
2243  * Diaplay statistical information about the I/O activity.
2244  */
2245 static int
2246 proc_read_stat(char *page, char **start, off_t offset, int count, int *eof,
2247                 void *data)
2248 {
2249         adapter_t       *adapter;
2250         int     len;
2251         int     i;
2252
2253         i = 0;  /* avoid compilation warnings */
2254         len = 0;
2255         adapter = (adapter_t *)data;
2256
2257         len = sprintf(page, "Statistical Information for this controller\n");
2258         len += sprintf(page+len, "pend_cmds = %d\n",
2259                         atomic_read(&adapter->pend_cmds));
2260 #if MEGA_HAVE_STATS
2261         for(i = 0; i < adapter->numldrv; i++) {
2262                 len += sprintf(page+len, "Logical Drive %d:\n", i);
2263
2264                 len += sprintf(page+len,
2265                         "\tReads Issued = %lu, Writes Issued = %lu\n",
2266                         adapter->nreads[i], adapter->nwrites[i]);
2267
2268                 len += sprintf(page+len,
2269                         "\tSectors Read = %lu, Sectors Written = %lu\n",
2270                         adapter->nreadblocks[i], adapter->nwriteblocks[i]);
2271
2272                 len += sprintf(page+len,
2273                         "\tRead errors = %lu, Write errors = %lu\n\n",
2274                         adapter->rd_errors[i], adapter->wr_errors[i]);
2275         }
2276 #else
2277         len += sprintf(page+len,
2278                         "IO and error counters not compiled in driver.\n");
2279 #endif
2280
2281         *eof = 1;
2282
2283         return len;
2284 }
2285
2286
2287 /**
2288  * proc_read_mbox()
2289  * @page - buffer to write the data in
2290  * @start - where the actual data has been written in page
2291  * @offset - same meaning as the read system call
2292  * @count - same meaning as the read system call
2293  * @eof - set if no more data needs to be returned
2294  * @data - pointer to our soft state
2295  *
2296  * Display mailbox information for the last command issued. This information
2297  * is good for debugging.
2298  */
2299 static int
2300 proc_read_mbox(char *page, char **start, off_t offset, int count, int *eof,
2301                 void *data)
2302 {
2303
2304         adapter_t       *adapter = (adapter_t *)data;
2305         volatile mbox_t *mbox = adapter->mbox;
2306         int     len = 0;
2307
2308         len = sprintf(page, "Contents of Mail Box Structure\n");
2309         len += sprintf(page+len, "  Fw Command   = 0x%02x\n",
2310                         mbox->m_out.cmd);
2311         len += sprintf(page+len, "  Cmd Sequence = 0x%02x\n",
2312                         mbox->m_out.cmdid);
2313         len += sprintf(page+len, "  No of Sectors= %04d\n",
2314                         mbox->m_out.numsectors);
2315         len += sprintf(page+len, "  LBA          = 0x%02x\n",
2316                         mbox->m_out.lba);
2317         len += sprintf(page+len, "  DTA          = 0x%08x\n",
2318                         mbox->m_out.xferaddr);
2319         len += sprintf(page+len, "  Logical Drive= 0x%02x\n",
2320                         mbox->m_out.logdrv);
2321         len += sprintf(page+len, "  No of SG Elmt= 0x%02x\n",
2322                         mbox->m_out.numsgelements);
2323         len += sprintf(page+len, "  Busy         = %01x\n",
2324                         mbox->m_in.busy);
2325         len += sprintf(page+len, "  Status       = 0x%02x\n",
2326                         mbox->m_in.status);
2327
2328         *eof = 1;
2329
2330         return len;
2331 }
2332
2333
2334 /**
2335  * proc_rebuild_rate()
2336  * @page - buffer to write the data in
2337  * @start - where the actual data has been written in page
2338  * @offset - same meaning as the read system call
2339  * @count - same meaning as the read system call
2340  * @eof - set if no more data needs to be returned
2341  * @data - pointer to our soft state
2342  *
2343  * Display current rebuild rate
2344  */
2345 static int
2346 proc_rebuild_rate(char *page, char **start, off_t offset, int count, int *eof,
2347                 void *data)
2348 {
2349         adapter_t       *adapter = (adapter_t *)data;
2350         dma_addr_t      dma_handle;
2351         caddr_t         inquiry;
2352         struct pci_dev  *pdev;
2353         int     len = 0;
2354
2355         if( make_local_pdev(adapter, &pdev) != 0 ) {
2356                 *eof = 1;
2357                 return len;
2358         }
2359
2360         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
2361                 free_local_pdev(pdev);
2362                 *eof = 1;
2363                 return len;
2364         }
2365
2366         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2367
2368                 len = sprintf(page, "Adapter inquiry failed.\n");
2369
2370                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2371
2372                 mega_free_inquiry(inquiry, dma_handle, pdev);
2373
2374                 free_local_pdev(pdev);
2375
2376                 *eof = 1;
2377
2378                 return len;
2379         }
2380
2381         if( adapter->flag & BOARD_40LD ) {
2382                 len = sprintf(page, "Rebuild Rate: [%d%%]\n",
2383                         ((mega_inquiry3 *)inquiry)->rebuild_rate);
2384         }
2385         else {
2386                 len = sprintf(page, "Rebuild Rate: [%d%%]\n",
2387                         ((mraid_ext_inquiry *)
2388                         inquiry)->raid_inq.adapter_info.rebuild_rate);
2389         }
2390
2391
2392         mega_free_inquiry(inquiry, dma_handle, pdev);
2393
2394         free_local_pdev(pdev);
2395
2396         *eof = 1;
2397
2398         return len;
2399 }
2400
2401
2402 /**
2403  * proc_battery()
2404  * @page - buffer to write the data in
2405  * @start - where the actual data has been written in page
2406  * @offset - same meaning as the read system call
2407  * @count - same meaning as the read system call
2408  * @eof - set if no more data needs to be returned
2409  * @data - pointer to our soft state
2410  *
2411  * Display information about the battery module on the controller.
2412  */
2413 static int
2414 proc_battery(char *page, char **start, off_t offset, int count, int *eof,
2415                 void *data)
2416 {
2417         adapter_t       *adapter = (adapter_t *)data;
2418         dma_addr_t      dma_handle;
2419         caddr_t         inquiry;
2420         struct pci_dev  *pdev;
2421         u8      battery_status = 0;
2422         char    str[256];
2423         int     len = 0;
2424
2425         if( make_local_pdev(adapter, &pdev) != 0 ) {
2426                 *eof = 1;
2427                 return len;
2428         }
2429
2430         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
2431                 free_local_pdev(pdev);
2432                 *eof = 1;
2433                 return len;
2434         }
2435
2436         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2437
2438                 len = sprintf(page, "Adapter inquiry failed.\n");
2439
2440                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2441
2442                 mega_free_inquiry(inquiry, dma_handle, pdev);
2443
2444                 free_local_pdev(pdev);
2445
2446                 *eof = 1;
2447
2448                 return len;
2449         }
2450
2451         if( adapter->flag & BOARD_40LD ) {
2452                 battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
2453         }
2454         else {
2455                 battery_status = ((mraid_ext_inquiry *)inquiry)->
2456                         raid_inq.adapter_info.battery_status;
2457         }
2458
2459         /*
2460          * Decode the battery status
2461          */
2462         sprintf(str, "Battery Status:[%d]", battery_status);
2463
2464         if(battery_status == MEGA_BATT_CHARGE_DONE)
2465                 strcat(str, " Charge Done");
2466
2467         if(battery_status & MEGA_BATT_MODULE_MISSING)
2468                 strcat(str, " Module Missing");
2469
2470         if(battery_status & MEGA_BATT_LOW_VOLTAGE)
2471                 strcat(str, " Low Voltage");
2472
2473         if(battery_status & MEGA_BATT_TEMP_HIGH)
2474                 strcat(str, " Temperature High");
2475
2476         if(battery_status & MEGA_BATT_PACK_MISSING)
2477                 strcat(str, " Pack Missing");
2478
2479         if(battery_status & MEGA_BATT_CHARGE_INPROG)
2480                 strcat(str, " Charge In-progress");
2481
2482         if(battery_status & MEGA_BATT_CHARGE_FAIL)
2483                 strcat(str, " Charge Fail");
2484
2485         if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
2486                 strcat(str, " Cycles Exceeded");
2487
2488         len = sprintf(page, "%s\n", str);
2489
2490
2491         mega_free_inquiry(inquiry, dma_handle, pdev);
2492
2493         free_local_pdev(pdev);
2494
2495         *eof = 1;
2496
2497         return len;
2498 }
2499
2500
2501 /**
2502  * proc_pdrv_ch0()
2503  * @page - buffer to write the data in
2504  * @start - where the actual data has been written in page
2505  * @offset - same meaning as the read system call
2506  * @count - same meaning as the read system call
2507  * @eof - set if no more data needs to be returned
2508  * @data - pointer to our soft state
2509  *
2510  * Display information about the physical drives on physical channel 0.
2511  */
2512 static int
2513 proc_pdrv_ch0(char *page, char **start, off_t offset, int count, int *eof,
2514                 void *data)
2515 {
2516         adapter_t *adapter = (adapter_t *)data;
2517
2518         *eof = 1;
2519
2520         return (proc_pdrv(adapter, page, 0));
2521 }
2522
2523
2524 /**
2525  * proc_pdrv_ch1()
2526  * @page - buffer to write the data in
2527  * @start - where the actual data has been written in page
2528  * @offset - same meaning as the read system call
2529  * @count - same meaning as the read system call
2530  * @eof - set if no more data needs to be returned
2531  * @data - pointer to our soft state
2532  *
2533  * Display information about the physical drives on physical channel 1.
2534  */
2535 static int
2536 proc_pdrv_ch1(char *page, char **start, off_t offset, int count, int *eof,
2537                 void *data)
2538 {
2539         adapter_t *adapter = (adapter_t *)data;
2540
2541         *eof = 1;
2542
2543         return (proc_pdrv(adapter, page, 1));
2544 }
2545
2546
2547 /**
2548  * proc_pdrv_ch2()
2549  * @page - buffer to write the data in
2550  * @start - where the actual data has been written in page
2551  * @offset - same meaning as the read system call
2552  * @count - same meaning as the read system call
2553  * @eof - set if no more data needs to be returned
2554  * @data - pointer to our soft state
2555  *
2556  * Display information about the physical drives on physical channel 2.
2557  */
2558 static int
2559 proc_pdrv_ch2(char *page, char **start, off_t offset, int count, int *eof,
2560                 void *data)
2561 {
2562         adapter_t *adapter = (adapter_t *)data;
2563
2564         *eof = 1;
2565
2566         return (proc_pdrv(adapter, page, 2));
2567 }
2568
2569
2570 /**
2571  * proc_pdrv_ch3()
2572  * @page - buffer to write the data in
2573  * @start - where the actual data has been written in page
2574  * @offset - same meaning as the read system call
2575  * @count - same meaning as the read system call
2576  * @eof - set if no more data needs to be returned
2577  * @data - pointer to our soft state
2578  *
2579  * Display information about the physical drives on physical channel 3.
2580  */
2581 static int
2582 proc_pdrv_ch3(char *page, char **start, off_t offset, int count, int *eof,
2583                 void *data)
2584 {
2585         adapter_t *adapter = (adapter_t *)data;
2586
2587         *eof = 1;
2588
2589         return (proc_pdrv(adapter, page, 3));
2590 }
2591
2592
2593 /**
2594  * proc_pdrv()
2595  * @page - buffer to write the data in
2596  * @adapter - pointer to our soft state
2597  *
2598  * Display information about the physical drives.
2599  */
2600 static int
2601 proc_pdrv(adapter_t *adapter, char *page, int channel)
2602 {
2603         dma_addr_t      dma_handle;
2604         char            *scsi_inq;
2605         dma_addr_t      scsi_inq_dma_handle;
2606         caddr_t         inquiry;
2607         struct pci_dev  *pdev;
2608         u8      *pdrv_state;
2609         u8      state;
2610         int     tgt;
2611         int     max_channels;
2612         int     len = 0;
2613         char    str[80];
2614         int     i;
2615
2616         if( make_local_pdev(adapter, &pdev) != 0 ) {
2617                 return len;
2618         }
2619
2620         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
2621                 goto free_pdev;
2622         }
2623
2624         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2625                 len = sprintf(page, "Adapter inquiry failed.\n");
2626
2627                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2628
2629                 goto free_inquiry;
2630         }
2631
2632
2633         scsi_inq = pci_alloc_consistent(pdev, 256, &scsi_inq_dma_handle);
2634
2635         if( scsi_inq == NULL ) {
2636                 len = sprintf(page, "memory not available for scsi inq.\n");
2637
2638                 goto free_inquiry;
2639         }
2640
2641         if( adapter->flag & BOARD_40LD ) {
2642                 pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
2643         }
2644         else {
2645                 pdrv_state = ((mraid_ext_inquiry *)inquiry)->
2646                         raid_inq.pdrv_info.pdrv_state;
2647         }
2648
2649         max_channels = adapter->product_info.nchannels;
2650
2651         if( channel >= max_channels ) {
2652                 goto free_pci;
2653         }
2654
2655         for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
2656
2657                 i = channel*16 + tgt;
2658
2659                 state = *(pdrv_state + i);
2660
2661                 switch( state & 0x0F ) {
2662
2663                 case PDRV_ONLINE:
2664                         sprintf(str,
2665                         "Channel:%2d Id:%2d State: Online",
2666                                 channel, tgt);
2667                         break;
2668
2669                 case PDRV_FAILED:
2670                         sprintf(str,
2671                         "Channel:%2d Id:%2d State: Failed",
2672                                 channel, tgt);
2673                         break;
2674
2675                 case PDRV_RBLD:
2676                         sprintf(str,
2677                         "Channel:%2d Id:%2d State: Rebuild",
2678                                 channel, tgt);
2679                         break;
2680
2681                 case PDRV_HOTSPARE:
2682                         sprintf(str,
2683                         "Channel:%2d Id:%2d State: Hot spare",
2684                                 channel, tgt);
2685                         break;
2686
2687                 default:
2688                         sprintf(str,
2689                         "Channel:%2d Id:%2d State: Un-configured",
2690                                 channel, tgt);
2691                         break;
2692
2693                 }
2694
2695                 /*
2696                  * This interface displays inquiries for disk drives
2697                  * only. Inquries for logical drives and non-disk
2698                  * devices are available through /proc/scsi/scsi
2699                  */
2700                 memset(scsi_inq, 0, 256);
2701                 if( mega_internal_dev_inquiry(adapter, channel, tgt,
2702                                 scsi_inq_dma_handle) ||
2703                                 (scsi_inq[0] & 0x1F) != TYPE_DISK ) {
2704                         continue;
2705                 }
2706
2707                 /*
2708                  * Check for overflow. We print less than 240
2709                  * characters for inquiry
2710                  */
2711                 if( (len + 240) >= PAGE_SIZE ) break;
2712
2713                 len += sprintf(page+len, "%s.\n", str);
2714
2715                 len += mega_print_inquiry(page+len, scsi_inq);
2716         }
2717
2718 free_pci:
2719         pci_free_consistent(pdev, 256, scsi_inq, scsi_inq_dma_handle);
2720 free_inquiry:
2721         mega_free_inquiry(inquiry, dma_handle, pdev);
2722 free_pdev:
2723         free_local_pdev(pdev);
2724
2725         return len;
2726 }
2727
2728
2729 /*
2730  * Display scsi inquiry
2731  */
2732 static int
2733 mega_print_inquiry(char *page, char *scsi_inq)
2734 {
2735         int     len = 0;
2736         int     i;
2737
2738         len = sprintf(page, "  Vendor: ");
2739         for( i = 8; i < 16; i++ ) {
2740                 len += sprintf(page+len, "%c", scsi_inq[i]);
2741         }
2742
2743         len += sprintf(page+len, "  Model: ");
2744
2745         for( i = 16; i < 32; i++ ) {
2746                 len += sprintf(page+len, "%c", scsi_inq[i]);
2747         }
2748
2749         len += sprintf(page+len, "  Rev: ");
2750
2751         for( i = 32; i < 36; i++ ) {
2752                 len += sprintf(page+len, "%c", scsi_inq[i]);
2753         }
2754
2755         len += sprintf(page+len, "\n");
2756
2757         i = scsi_inq[0] & 0x1f;
2758
2759         len += sprintf(page+len, "  Type:   %s ", scsi_device_type(i));
2760
2761         len += sprintf(page+len,
2762         "                 ANSI SCSI revision: %02x", scsi_inq[2] & 0x07);
2763
2764         if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
2765                 len += sprintf(page+len, " CCS\n");
2766         else
2767                 len += sprintf(page+len, "\n");
2768
2769         return len;
2770 }
2771
2772
2773 /**
2774  * proc_rdrv_10()
2775  * @page - buffer to write the data in
2776  * @start - where the actual data has been written in page
2777  * @offset - same meaning as the read system call
2778  * @count - same meaning as the read system call
2779  * @eof - set if no more data needs to be returned
2780  * @data - pointer to our soft state
2781  *
2782  * Display real time information about the logical drives 0 through 9.
2783  */
2784 static int
2785 proc_rdrv_10(char *page, char **start, off_t offset, int count, int *eof,
2786                 void *data)
2787 {
2788         adapter_t *adapter = (adapter_t *)data;
2789
2790         *eof = 1;
2791
2792         return (proc_rdrv(adapter, page, 0, 9));
2793 }
2794
2795
2796 /**
2797  * proc_rdrv_20()
2798  * @page - buffer to write the data in
2799  * @start - where the actual data has been written in page
2800  * @offset - same meaning as the read system call
2801  * @count - same meaning as the read system call
2802  * @eof - set if no more data needs to be returned
2803  * @data - pointer to our soft state
2804  *
2805  * Display real time information about the logical drives 0 through 9.
2806  */
2807 static int
2808 proc_rdrv_20(char *page, char **start, off_t offset, int count, int *eof,
2809                 void *data)
2810 {
2811         adapter_t *adapter = (adapter_t *)data;
2812
2813         *eof = 1;
2814
2815         return (proc_rdrv(adapter, page, 10, 19));
2816 }
2817
2818
2819 /**
2820  * proc_rdrv_30()
2821  * @page - buffer to write the data in
2822  * @start - where the actual data has been written in page
2823  * @offset - same meaning as the read system call
2824  * @count - same meaning as the read system call
2825  * @eof - set if no more data needs to be returned
2826  * @data - pointer to our soft state
2827  *
2828  * Display real time information about the logical drives 0 through 9.
2829  */
2830 static int
2831 proc_rdrv_30(char *page, char **start, off_t offset, int count, int *eof,
2832                 void *data)
2833 {
2834         adapter_t *adapter = (adapter_t *)data;
2835
2836         *eof = 1;
2837
2838         return (proc_rdrv(adapter, page, 20, 29));
2839 }
2840
2841
2842 /**
2843  * proc_rdrv_40()
2844  * @page - buffer to write the data in
2845  * @start - where the actual data has been written in page
2846  * @offset - same meaning as the read system call
2847  * @count - same meaning as the read system call
2848  * @eof - set if no more data needs to be returned
2849  * @data - pointer to our soft state
2850  *
2851  * Display real time information about the logical drives 0 through 9.
2852  */
2853 static int
2854 proc_rdrv_40(char *page, char **start, off_t offset, int count, int *eof,
2855                 void *data)
2856 {
2857         adapter_t *adapter = (adapter_t *)data;
2858
2859         *eof = 1;
2860
2861         return (proc_rdrv(adapter, page, 30, 39));
2862 }
2863
2864
2865 /**
2866  * proc_rdrv()
2867  * @page - buffer to write the data in
2868  * @adapter - pointer to our soft state
2869  * @start - starting logical drive to display
2870  * @end - ending logical drive to display
2871  *
2872  * We do not print the inquiry information since its already available through
2873  * /proc/scsi/scsi interface
2874  */
2875 static int
2876 proc_rdrv(adapter_t *adapter, char *page, int start, int end )
2877 {
2878         dma_addr_t      dma_handle;
2879         logdrv_param    *lparam;
2880         megacmd_t       mc;
2881         char            *disk_array;
2882         dma_addr_t      disk_array_dma_handle;
2883         caddr_t         inquiry;
2884         struct pci_dev  *pdev;
2885         u8      *rdrv_state;
2886         int     num_ldrv;
2887         u32     array_sz;
2888         int     len = 0;
2889         int     i;
2890
2891         if( make_local_pdev(adapter, &pdev) != 0 ) {
2892                 return len;
2893         }
2894
2895         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
2896                 free_local_pdev(pdev);
2897                 return len;
2898         }
2899
2900         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2901
2902                 len = sprintf(page, "Adapter inquiry failed.\n");
2903
2904                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2905
2906                 mega_free_inquiry(inquiry, dma_handle, pdev);
2907
2908                 free_local_pdev(pdev);
2909
2910                 return len;
2911         }
2912
2913         memset(&mc, 0, sizeof(megacmd_t));
2914
2915         if( adapter->flag & BOARD_40LD ) {
2916                 array_sz = sizeof(disk_array_40ld);
2917
2918                 rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
2919
2920                 num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
2921         }
2922         else {
2923                 array_sz = sizeof(disk_array_8ld);
2924
2925                 rdrv_state = ((mraid_ext_inquiry *)inquiry)->
2926                         raid_inq.logdrv_info.ldrv_state;
2927
2928                 num_ldrv = ((mraid_ext_inquiry *)inquiry)->
2929                         raid_inq.logdrv_info.num_ldrv;
2930         }
2931
2932         disk_array = pci_alloc_consistent(pdev, array_sz,
2933                         &disk_array_dma_handle);
2934
2935         if( disk_array == NULL ) {
2936                 len = sprintf(page, "memory not available.\n");
2937
2938                 mega_free_inquiry(inquiry, dma_handle, pdev);
2939
2940                 free_local_pdev(pdev);
2941
2942                 return len;
2943         }
2944
2945         mc.xferaddr = (u32)disk_array_dma_handle;
2946
2947         if( adapter->flag & BOARD_40LD ) {
2948                 mc.cmd = FC_NEW_CONFIG;
2949                 mc.opcode = OP_DCMD_READ_CONFIG;
2950
2951                 if( mega_internal_command(adapter, &mc, NULL) ) {
2952
2953                         len = sprintf(page, "40LD read config failed.\n");
2954
2955                         mega_free_inquiry(inquiry, dma_handle, pdev);
2956
2957                         pci_free_consistent(pdev, array_sz, disk_array,
2958                                         disk_array_dma_handle);
2959
2960                         free_local_pdev(pdev);
2961
2962                         return len;
2963                 }
2964
2965         }
2966         else {
2967                 mc.cmd = NEW_READ_CONFIG_8LD;
2968
2969                 if( mega_internal_command(adapter, &mc, NULL) ) {
2970
2971                         mc.cmd = READ_CONFIG_8LD;
2972
2973                         if( mega_internal_command(adapter, &mc,
2974                                                 NULL) ){
2975
2976                                 len = sprintf(page,
2977                                         "8LD read config failed.\n");
2978
2979                                 mega_free_inquiry(inquiry, dma_handle, pdev);
2980
2981                                 pci_free_consistent(pdev, array_sz,
2982                                                 disk_array,
2983                                                 disk_array_dma_handle);
2984
2985                                 free_local_pdev(pdev);
2986
2987                                 return len;
2988                         }
2989                 }
2990         }
2991
2992         for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
2993
2994                 if( adapter->flag & BOARD_40LD ) {
2995                         lparam =
2996                         &((disk_array_40ld *)disk_array)->ldrv[i].lparam;
2997                 }
2998                 else {
2999                         lparam =
3000                         &((disk_array_8ld *)disk_array)->ldrv[i].lparam;
3001                 }
3002
3003                 /*
3004                  * Check for overflow. We print less than 240 characters for
3005                  * information about each logical drive.
3006                  */
3007                 if( (len + 240) >= PAGE_SIZE ) break;
3008
3009                 len += sprintf(page+len, "Logical drive:%2d:, ", i);
3010
3011                 switch( rdrv_state[i] & 0x0F ) {
3012                 case RDRV_OFFLINE:
3013                         len += sprintf(page+len, "state: offline");
3014                         break;
3015
3016                 case RDRV_DEGRADED:
3017                         len += sprintf(page+len, "state: degraded");
3018                         break;
3019
3020                 case RDRV_OPTIMAL:
3021                         len += sprintf(page+len, "state: optimal");
3022                         break;
3023
3024                 case RDRV_DELETED:
3025                         len += sprintf(page+len, "state: deleted");
3026                         break;
3027
3028                 default:
3029                         len += sprintf(page+len, "state: unknown");
3030                         break;
3031                 }
3032
3033                 /*
3034                  * Check if check consistency or initialization is going on
3035                  * for this logical drive.
3036                  */
3037                 if( (rdrv_state[i] & 0xF0) == 0x20 ) {
3038                         len += sprintf(page+len,
3039                                         ", check-consistency in progress");
3040                 }
3041                 else if( (rdrv_state[i] & 0xF0) == 0x10 ) {
3042                         len += sprintf(page+len,
3043                                         ", initialization in progress");
3044                 }
3045
3046                 len += sprintf(page+len, "\n");
3047
3048                 len += sprintf(page+len, "Span depth:%3d, ",
3049                                 lparam->span_depth);
3050
3051                 len += sprintf(page+len, "RAID level:%3d, ",
3052                                 lparam->level);
3053
3054                 len += sprintf(page+len, "Stripe size:%3d, ",
3055                                 lparam->stripe_sz ? lparam->stripe_sz/2: 128);
3056
3057                 len += sprintf(page+len, "Row size:%3d\n",
3058                                 lparam->row_size);
3059
3060
3061                 len += sprintf(page+len, "Read Policy: ");
3062
3063                 switch(lparam->read_ahead) {
3064
3065                 case NO_READ_AHEAD:
3066                         len += sprintf(page+len, "No read ahead, ");
3067                         break;
3068
3069                 case READ_AHEAD:
3070                         len += sprintf(page+len, "Read ahead, ");
3071                         break;
3072
3073                 case ADAP_READ_AHEAD:
3074                         len += sprintf(page+len, "Adaptive, ");
3075                         break;
3076
3077                 }
3078
3079                 len += sprintf(page+len, "Write Policy: ");
3080
3081                 switch(lparam->write_mode) {
3082
3083                 case WRMODE_WRITE_THRU:
3084                         len += sprintf(page+len, "Write thru, ");
3085                         break;
3086
3087                 case WRMODE_WRITE_BACK:
3088                         len += sprintf(page+len, "Write back, ");
3089                         break;
3090                 }
3091
3092                 len += sprintf(page+len, "Cache Policy: ");
3093
3094                 switch(lparam->direct_io) {
3095
3096                 case CACHED_IO:
3097                         len += sprintf(page+len, "Cached IO\n\n");
3098                         break;
3099
3100                 case DIRECT_IO:
3101                         len += sprintf(page+len, "Direct IO\n\n");
3102                         break;
3103                 }
3104         }
3105
3106         mega_free_inquiry(inquiry, dma_handle, pdev);
3107
3108         pci_free_consistent(pdev, array_sz, disk_array,
3109                         disk_array_dma_handle);
3110
3111         free_local_pdev(pdev);
3112
3113         return len;
3114 }
3115 #else
3116 static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
3117 {
3118 }
3119 #endif
3120
3121
3122 /**
3123  * megaraid_biosparam()
3124  *
3125  * Return the disk geometry for a particular disk
3126  */
3127 static int
3128 megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
3129                     sector_t capacity, int geom[])
3130 {
3131         adapter_t       *adapter;
3132         unsigned char   *bh;
3133         int     heads;
3134         int     sectors;
3135         int     cylinders;
3136         int     rval;
3137
3138         /* Get pointer to host config structure */
3139         adapter = (adapter_t *)sdev->host->hostdata;
3140
3141         if (IS_RAID_CH(adapter, sdev->channel)) {
3142                         /* Default heads (64) & sectors (32) */
3143                         heads = 64;