linux/drivers/scsi/megaraid.c
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   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
  60MODULE_AUTHOR ("sju@lsil.com");
  61MODULE_DESCRIPTION ("LSI Logic MegaRAID legacy driver");
  62MODULE_LICENSE ("GPL");
  63MODULE_VERSION(MEGARAID_MODULE_VERSION);
  64
  65static DEFINE_MUTEX(megadev_mutex);
  66static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
  67module_param(max_cmd_per_lun, uint, 0);
  68MODULE_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
  70static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO;
  71module_param(max_sectors_per_io, ushort, 0);
  72MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)");
  73
  74
  75static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT;
  76module_param(max_mbox_busy_wait, ushort, 0);
  77MODULE_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
  88static int hba_count;
  89static adapter_t *hba_soft_state[MAX_CONTROLLERS];
  90static struct proc_dir_entry *mega_proc_dir_entry;
  91
  92/* For controller re-ordering */
  93static struct mega_hbas mega_hbas[MAX_CONTROLLERS];
  94
  95static long
  96megadev_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 */
 101static 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 */
 113static struct mcontroller mcontroller[MAX_CONTROLLERS];
 114
 115/* The current driver version */
 116static u32 driver_ver = 0x02000000;
 117
 118/* major number used by the device for character interface */
 119static 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 */
 127static 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 */
 135static int
 136mega_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 */
 192static int
 193mega_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           Note: fw_version[0|1] and bios_version[0|1] were originally shifted
 311           right 8 bits making them zero. This 0 value was hardcoded to fix
 312           sparse warnings. */
 313        if (adapter->product_info.subsysvid == HP_SUBSYS_VID) {
 314                sprintf (adapter->fw_version, "%c%d%d.%d%d",
 315                         adapter->product_info.fw_version[2],
 316                         0,
 317                         adapter->product_info.fw_version[1] & 0x0f,
 318                         0,
 319                         adapter->product_info.fw_version[0] & 0x0f);
 320                sprintf (adapter->bios_version, "%c%d%d.%d%d",
 321                         adapter->product_info.bios_version[2],
 322                         0,
 323                         adapter->product_info.bios_version[1] & 0x0f,
 324                         0,
 325                         adapter->product_info.bios_version[0] & 0x0f);
 326        } else {
 327                memcpy(adapter->fw_version,
 328                                (char *)adapter->product_info.fw_version, 4);
 329                adapter->fw_version[4] = 0;
 330
 331                memcpy(adapter->bios_version,
 332                                (char *)adapter->product_info.bios_version, 4);
 333
 334                adapter->bios_version[4] = 0;
 335        }
 336
 337        printk(KERN_NOTICE "megaraid: [%s:%s] detected %d logical drives.\n",
 338                adapter->fw_version, adapter->bios_version, adapter->numldrv);
 339
 340        /*
 341         * Do we support extended (>10 bytes) cdbs
 342         */
 343        adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
 344        if (adapter->support_ext_cdb)
 345                printk(KERN_NOTICE "megaraid: supports extended CDBs.\n");
 346
 347
 348        return 0;
 349}
 350
 351/**
 352 * mega_runpendq()
 353 * @adapter - pointer to our soft state
 354 *
 355 * Runs through the list of pending requests.
 356 */
 357static inline void
 358mega_runpendq(adapter_t *adapter)
 359{
 360        if(!list_empty(&adapter->pending_list))
 361                __mega_runpendq(adapter);
 362}
 363
 364/*
 365 * megaraid_queue()
 366 * @scmd - Issue this scsi command
 367 * @done - the callback hook into the scsi mid-layer
 368 *
 369 * The command queuing entry point for the mid-layer.
 370 */
 371static int
 372megaraid_queue_lck(Scsi_Cmnd *scmd, void (*done)(Scsi_Cmnd *))
 373{
 374        adapter_t       *adapter;
 375        scb_t   *scb;
 376        int     busy=0;
 377        unsigned long flags;
 378
 379        adapter = (adapter_t *)scmd->device->host->hostdata;
 380
 381        scmd->scsi_done = done;
 382
 383
 384        /*
 385         * Allocate and build a SCB request
 386         * busy flag will be set if mega_build_cmd() command could not
 387         * allocate scb. We will return non-zero status in that case.
 388         * NOTE: scb can be null even though certain commands completed
 389         * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, we would
 390         * return 0 in that case.
 391         */
 392
 393        spin_lock_irqsave(&adapter->lock, flags);
 394        scb = mega_build_cmd(adapter, scmd, &busy);
 395        if (!scb)
 396                goto out;
 397
 398        scb->state |= SCB_PENDQ;
 399        list_add_tail(&scb->list, &adapter->pending_list);
 400
 401        /*
 402         * Check if the HBA is in quiescent state, e.g., during a
 403         * delete logical drive opertion. If it is, don't run
 404         * the pending_list.
 405         */
 406        if (atomic_read(&adapter->quiescent) == 0)
 407                mega_runpendq(adapter);
 408
 409        busy = 0;
 410 out:
 411        spin_unlock_irqrestore(&adapter->lock, flags);
 412        return busy;
 413}
 414
 415static DEF_SCSI_QCMD(megaraid_queue)
 416
 417/**
 418 * mega_allocate_scb()
 419 * @adapter - pointer to our soft state
 420 * @cmd - scsi command from the mid-layer
 421 *
 422 * Allocate a SCB structure. This is the central structure for controller
 423 * commands.
 424 */
 425static inline scb_t *
 426mega_allocate_scb(adapter_t *adapter, Scsi_Cmnd *cmd)
 427{
 428        struct list_head *head = &adapter->free_list;
 429        scb_t   *scb;
 430
 431        /* Unlink command from Free List */
 432        if( !list_empty(head) ) {
 433
 434                scb = list_entry(head->next, scb_t, list);
 435
 436                list_del_init(head->next);
 437
 438                scb->state = SCB_ACTIVE;
 439                scb->cmd = cmd;
 440                scb->dma_type = MEGA_DMA_TYPE_NONE;
 441
 442                return scb;
 443        }
 444
 445        return NULL;
 446}
 447
 448/**
 449 * mega_get_ldrv_num()
 450 * @adapter - pointer to our soft state
 451 * @cmd - scsi mid layer command
 452 * @channel - channel on the controller
 453 *
 454 * Calculate the logical drive number based on the information in scsi command
 455 * and the channel number.
 456 */
 457static inline int
 458mega_get_ldrv_num(adapter_t *adapter, Scsi_Cmnd *cmd, int channel)
 459{
 460        int             tgt;
 461        int             ldrv_num;
 462
 463        tgt = cmd->device->id;
 464        
 465        if ( tgt > adapter->this_id )
 466                tgt--;  /* we do not get inquires for initiator id */
 467
 468        ldrv_num = (channel * 15) + tgt;
 469
 470
 471        /*
 472         * If we have a logical drive with boot enabled, project it first
 473         */
 474        if( adapter->boot_ldrv_enabled ) {
 475                if( ldrv_num == 0 ) {
 476                        ldrv_num = adapter->boot_ldrv;
 477                }
 478                else {
 479                        if( ldrv_num <= adapter->boot_ldrv ) {
 480                                ldrv_num--;
 481                        }
 482                }
 483        }
 484
 485        /*
 486         * If "delete logical drive" feature is enabled on this controller.
 487         * Do only if at least one delete logical drive operation was done.
 488         *
 489         * Also, after logical drive deletion, instead of logical drive number,
 490         * the value returned should be 0x80+logical drive id.
 491         *
 492         * These is valid only for IO commands.
 493         */
 494
 495        if (adapter->support_random_del && adapter->read_ldidmap )
 496                switch (cmd->cmnd[0]) {
 497                case READ_6:    /* fall through */
 498                case WRITE_6:   /* fall through */
 499                case READ_10:   /* fall through */
 500                case WRITE_10:
 501                        ldrv_num += 0x80;
 502                }
 503
 504        return ldrv_num;
 505}
 506
 507/**
 508 * mega_build_cmd()
 509 * @adapter - pointer to our soft state
 510 * @cmd - Prepare using this scsi command
 511 * @busy - busy flag if no resources
 512 *
 513 * Prepares a command and scatter gather list for the controller. This routine
 514 * also finds out if the commands is intended for a logical drive or a
 515 * physical device and prepares the controller command accordingly.
 516 *
 517 * We also re-order the logical drives and physical devices based on their
 518 * boot settings.
 519 */
 520static scb_t *
 521mega_build_cmd(adapter_t *adapter, Scsi_Cmnd *cmd, int *busy)
 522{
 523        mega_ext_passthru       *epthru;
 524        mega_passthru   *pthru;
 525        scb_t   *scb;
 526        mbox_t  *mbox;
 527        u32     seg;
 528        char    islogical;
 529        int     max_ldrv_num;
 530        int     channel = 0;
 531        int     target = 0;
 532        int     ldrv_num = 0;   /* logical drive number */
 533
 534
 535        /*
 536         * filter the internal and ioctl commands
 537         */
 538        if((cmd->cmnd[0] == MEGA_INTERNAL_CMD))
 539                return (scb_t *)cmd->host_scribble;
 540
 541        /*
 542         * We know what channels our logical drives are on - mega_find_card()
 543         */
 544        islogical = adapter->logdrv_chan[cmd->device->channel];
 545
 546        /*
 547         * The theory: If physical drive is chosen for boot, all the physical
 548         * devices are exported before the logical drives, otherwise physical
 549         * devices are pushed after logical drives, in which case - Kernel sees
 550         * the physical devices on virtual channel which is obviously converted
 551         * to actual channel on the HBA.
 552         */
 553        if( adapter->boot_pdrv_enabled ) {
 554                if( islogical ) {
 555                        /* logical channel */
 556                        channel = cmd->device->channel -
 557                                adapter->product_info.nchannels;
 558                }
 559                else {
 560                        /* this is physical channel */
 561                        channel = cmd->device->channel; 
 562                        target = cmd->device->id;
 563
 564                        /*
 565                         * boot from a physical disk, that disk needs to be
 566                         * exposed first IF both the channels are SCSI, then
 567                         * booting from the second channel is not allowed.
 568                         */
 569                        if( target == 0 ) {
 570                                target = adapter->boot_pdrv_tgt;
 571                        }
 572                        else if( target == adapter->boot_pdrv_tgt ) {
 573                                target = 0;
 574                        }
 575                }
 576        }
 577        else {
 578                if( islogical ) {
 579                        /* this is the logical channel */
 580                        channel = cmd->device->channel; 
 581                }
 582                else {
 583                        /* physical channel */
 584                        channel = cmd->device->channel - NVIRT_CHAN;    
 585                        target = cmd->device->id;
 586                }
 587        }
 588
 589
 590        if(islogical) {
 591
 592                /* have just LUN 0 for each target on virtual channels */
 593                if (cmd->device->lun) {
 594                        cmd->result = (DID_BAD_TARGET << 16);
 595                        cmd->scsi_done(cmd);
 596                        return NULL;
 597                }
 598
 599                ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);
 600
 601
 602                max_ldrv_num = (adapter->flag & BOARD_40LD) ?
 603                        MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;
 604
 605                /*
 606                 * max_ldrv_num increases by 0x80 if some logical drive was
 607                 * deleted.
 608                 */
 609                if(adapter->read_ldidmap)
 610                        max_ldrv_num += 0x80;
 611
 612                if(ldrv_num > max_ldrv_num ) {
 613                        cmd->result = (DID_BAD_TARGET << 16);
 614                        cmd->scsi_done(cmd);
 615                        return NULL;
 616                }
 617
 618        }
 619        else {
 620                if( cmd->device->lun > 7) {
 621                        /*
 622                         * Do not support lun >7 for physically accessed
 623                         * devices
 624                         */
 625                        cmd->result = (DID_BAD_TARGET << 16);
 626                        cmd->scsi_done(cmd);
 627                        return NULL;
 628                }
 629        }
 630
 631        /*
 632         *
 633         * Logical drive commands
 634         *
 635         */
 636        if(islogical) {
 637                switch (cmd->cmnd[0]) {
 638                case TEST_UNIT_READY:
 639#if MEGA_HAVE_CLUSTERING
 640                        /*
 641                         * Do we support clustering and is the support enabled
 642                         * If no, return success always
 643                         */
 644                        if( !adapter->has_cluster ) {
 645                                cmd->result = (DID_OK << 16);
 646                                cmd->scsi_done(cmd);
 647                                return NULL;
 648                        }
 649
 650                        if(!(scb = mega_allocate_scb(adapter, cmd))) {
 651                                *busy = 1;
 652                                return NULL;
 653                        }
 654
 655                        scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 656                        scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
 657                        scb->raw_mbox[3] = ldrv_num;
 658
 659                        scb->dma_direction = PCI_DMA_NONE;
 660
 661                        return scb;
 662#else
 663                        cmd->result = (DID_OK << 16);
 664                        cmd->scsi_done(cmd);
 665                        return NULL;
 666#endif
 667
 668                case MODE_SENSE: {
 669                        char *buf;
 670                        struct scatterlist *sg;
 671
 672                        sg = scsi_sglist(cmd);
 673                        buf = kmap_atomic(sg_page(sg)) + sg->offset;
 674
 675                        memset(buf, 0, cmd->cmnd[4]);
 676                        kunmap_atomic(buf - sg->offset);
 677
 678                        cmd->result = (DID_OK << 16);
 679                        cmd->scsi_done(cmd);
 680                        return NULL;
 681                }
 682
 683                case READ_CAPACITY:
 684                case INQUIRY:
 685
 686                        if(!(adapter->flag & (1L << cmd->device->channel))) {
 687
 688                                printk(KERN_NOTICE
 689                                        "scsi%d: scanning scsi channel %d ",
 690                                                adapter->host->host_no,
 691                                                cmd->device->channel);
 692                                printk("for logical drives.\n");
 693
 694                                adapter->flag |= (1L << cmd->device->channel);
 695                        }
 696
 697                        /* Allocate a SCB and initialize passthru */
 698                        if(!(scb = mega_allocate_scb(adapter, cmd))) {
 699                                *busy = 1;
 700                                return NULL;
 701                        }
 702                        pthru = scb->pthru;
 703
 704                        mbox = (mbox_t *)scb->raw_mbox;
 705                        memset(mbox, 0, sizeof(scb->raw_mbox));
 706                        memset(pthru, 0, sizeof(mega_passthru));
 707
 708                        pthru->timeout = 0;
 709                        pthru->ars = 1;
 710                        pthru->reqsenselen = 14;
 711                        pthru->islogical = 1;
 712                        pthru->logdrv = ldrv_num;
 713                        pthru->cdblen = cmd->cmd_len;
 714                        memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 715
 716                        if( adapter->has_64bit_addr ) {
 717                                mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 718                        }
 719                        else {
 720                                mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 721                        }
 722
 723                        scb->dma_direction = PCI_DMA_FROMDEVICE;
 724
 725                        pthru->numsgelements = mega_build_sglist(adapter, scb,
 726                                &pthru->dataxferaddr, &pthru->dataxferlen);
 727
 728                        mbox->m_out.xferaddr = scb->pthru_dma_addr;
 729
 730                        return scb;
 731
 732                case READ_6:
 733                case WRITE_6:
 734                case READ_10:
 735                case WRITE_10:
 736                case READ_12:
 737                case WRITE_12:
 738
 739                        /* Allocate a SCB and initialize mailbox */
 740                        if(!(scb = mega_allocate_scb(adapter, cmd))) {
 741                                *busy = 1;
 742                                return NULL;
 743                        }
 744                        mbox = (mbox_t *)scb->raw_mbox;
 745
 746                        memset(mbox, 0, sizeof(scb->raw_mbox));
 747                        mbox->m_out.logdrv = ldrv_num;
 748
 749                        /*
 750                         * A little hack: 2nd bit is zero for all scsi read
 751                         * commands and is set for all scsi write commands
 752                         */
 753                        if( adapter->has_64bit_addr ) {
 754                                mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 755                                        MEGA_MBOXCMD_LWRITE64:
 756                                        MEGA_MBOXCMD_LREAD64 ;
 757                        }
 758                        else {
 759                                mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 760                                        MEGA_MBOXCMD_LWRITE:
 761                                        MEGA_MBOXCMD_LREAD ;
 762                        }
 763
 764                        /*
 765                         * 6-byte READ(0x08) or WRITE(0x0A) cdb
 766                         */
 767                        if( cmd->cmd_len == 6 ) {
 768                                mbox->m_out.numsectors = (u32) cmd->cmnd[4];
 769                                mbox->m_out.lba =
 770                                        ((u32)cmd->cmnd[1] << 16) |
 771                                        ((u32)cmd->cmnd[2] << 8) |
 772                                        (u32)cmd->cmnd[3];
 773
 774                                mbox->m_out.lba &= 0x1FFFFF;
 775
 776#if MEGA_HAVE_STATS
 777                                /*
 778                                 * Take modulo 0x80, since the logical drive
 779                                 * number increases by 0x80 when a logical
 780                                 * drive was deleted
 781                                 */
 782                                if (*cmd->cmnd == READ_6) {
 783                                        adapter->nreads[ldrv_num%0x80]++;
 784                                        adapter->nreadblocks[ldrv_num%0x80] +=
 785                                                mbox->m_out.numsectors;
 786                                } else {
 787                                        adapter->nwrites[ldrv_num%0x80]++;
 788                                        adapter->nwriteblocks[ldrv_num%0x80] +=
 789                                                mbox->m_out.numsectors;
 790                                }
 791#endif
 792                        }
 793
 794                        /*
 795                         * 10-byte READ(0x28) or WRITE(0x2A) cdb
 796                         */
 797                        if( cmd->cmd_len == 10 ) {
 798                                mbox->m_out.numsectors =
 799                                        (u32)cmd->cmnd[8] |
 800                                        ((u32)cmd->cmnd[7] << 8);
 801                                mbox->m_out.lba =
 802                                        ((u32)cmd->cmnd[2] << 24) |
 803                                        ((u32)cmd->cmnd[3] << 16) |
 804                                        ((u32)cmd->cmnd[4] << 8) |
 805                                        (u32)cmd->cmnd[5];
 806
 807#if MEGA_HAVE_STATS
 808                                if (*cmd->cmnd == READ_10) {
 809                                        adapter->nreads[ldrv_num%0x80]++;
 810                                        adapter->nreadblocks[ldrv_num%0x80] +=
 811                                                mbox->m_out.numsectors;
 812                                } else {
 813                                        adapter->nwrites[ldrv_num%0x80]++;
 814                                        adapter->nwriteblocks[ldrv_num%0x80] +=
 815                                                mbox->m_out.numsectors;
 816                                }
 817#endif
 818                        }
 819
 820                        /*
 821                         * 12-byte READ(0xA8) or WRITE(0xAA) cdb
 822                         */
 823                        if( cmd->cmd_len == 12 ) {
 824                                mbox->m_out.lba =
 825                                        ((u32)cmd->cmnd[2] << 24) |
 826                                        ((u32)cmd->cmnd[3] << 16) |
 827                                        ((u32)cmd->cmnd[4] << 8) |
 828                                        (u32)cmd->cmnd[5];
 829
 830                                mbox->m_out.numsectors =
 831                                        ((u32)cmd->cmnd[6] << 24) |
 832                                        ((u32)cmd->cmnd[7] << 16) |
 833                                        ((u32)cmd->cmnd[8] << 8) |
 834                                        (u32)cmd->cmnd[9];
 835
 836#if MEGA_HAVE_STATS
 837                                if (*cmd->cmnd == READ_12) {
 838                                        adapter->nreads[ldrv_num%0x80]++;
 839                                        adapter->nreadblocks[ldrv_num%0x80] +=
 840                                                mbox->m_out.numsectors;
 841                                } else {
 842                                        adapter->nwrites[ldrv_num%0x80]++;
 843                                        adapter->nwriteblocks[ldrv_num%0x80] +=
 844                                                mbox->m_out.numsectors;
 845                                }
 846#endif
 847                        }
 848
 849                        /*
 850                         * If it is a read command
 851                         */
 852                        if( (*cmd->cmnd & 0x0F) == 0x08 ) {
 853                                scb->dma_direction = PCI_DMA_FROMDEVICE;
 854                        }
 855                        else {
 856                                scb->dma_direction = PCI_DMA_TODEVICE;
 857                        }
 858
 859                        /* Calculate Scatter-Gather info */
 860                        mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
 861                                        (u32 *)&mbox->m_out.xferaddr, &seg);
 862
 863                        return scb;
 864
 865#if MEGA_HAVE_CLUSTERING
 866                case RESERVE:   /* Fall through */
 867                case RELEASE:
 868
 869                        /*
 870                         * Do we support clustering and is the support enabled
 871                         */
 872                        if( ! adapter->has_cluster ) {
 873
 874                                cmd->result = (DID_BAD_TARGET << 16);
 875                                cmd->scsi_done(cmd);
 876                                return NULL;
 877                        }
 878
 879                        /* Allocate a SCB and initialize mailbox */
 880                        if(!(scb = mega_allocate_scb(adapter, cmd))) {
 881                                *busy = 1;
 882                                return NULL;
 883                        }
 884
 885                        scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 886                        scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
 887                                MEGA_RESERVE_LD : MEGA_RELEASE_LD;
 888
 889                        scb->raw_mbox[3] = ldrv_num;
 890
 891                        scb->dma_direction = PCI_DMA_NONE;
 892
 893                        return scb;
 894#endif
 895
 896                default:
 897                        cmd->result = (DID_BAD_TARGET << 16);
 898                        cmd->scsi_done(cmd);
 899                        return NULL;
 900                }
 901        }
 902
 903        /*
 904         * Passthru drive commands
 905         */
 906        else {
 907                /* Allocate a SCB and initialize passthru */
 908                if(!(scb = mega_allocate_scb(adapter, cmd))) {
 909                        *busy = 1;
 910                        return NULL;
 911                }
 912
 913                mbox = (mbox_t *)scb->raw_mbox;
 914                memset(mbox, 0, sizeof(scb->raw_mbox));
 915
 916                if( adapter->support_ext_cdb ) {
 917
 918                        epthru = mega_prepare_extpassthru(adapter, scb, cmd,
 919                                        channel, target);
 920
 921                        mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;
 922
 923                        mbox->m_out.xferaddr = scb->epthru_dma_addr;
 924
 925                }
 926                else {
 927
 928                        pthru = mega_prepare_passthru(adapter, scb, cmd,
 929                                        channel, target);
 930
 931                        /* Initialize mailbox */
 932                        if( adapter->has_64bit_addr ) {
 933                                mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 934                        }
 935                        else {
 936                                mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 937                        }
 938
 939                        mbox->m_out.xferaddr = scb->pthru_dma_addr;
 940
 941                }
 942                return scb;
 943        }
 944        return NULL;
 945}
 946
 947
 948/**
 949 * mega_prepare_passthru()
 950 * @adapter - pointer to our soft state
 951 * @scb - our scsi control block
 952 * @cmd - scsi command from the mid-layer
 953 * @channel - actual channel on the controller
 954 * @target - actual id on the controller.
 955 *
 956 * prepare a command for the scsi physical devices.
 957 */
 958static mega_passthru *
 959mega_prepare_passthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
 960                int channel, int target)
 961{
 962        mega_passthru *pthru;
 963
 964        pthru = scb->pthru;
 965        memset(pthru, 0, sizeof (mega_passthru));
 966
 967        /* 0=6sec/1=60sec/2=10min/3=3hrs */
 968        pthru->timeout = 2;
 969
 970        pthru->ars = 1;
 971        pthru->reqsenselen = 14;
 972        pthru->islogical = 0;
 973
 974        pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
 975
 976        pthru->target = (adapter->flag & BOARD_40LD) ?
 977                (channel << 4) | target : target;
 978
 979        pthru->cdblen = cmd->cmd_len;
 980        pthru->logdrv = cmd->device->lun;
 981
 982        memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 983
 984        /* Not sure about the direction */
 985        scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
 986
 987        /* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
 988        switch (cmd->cmnd[0]) {
 989        case INQUIRY:
 990        case READ_CAPACITY:
 991                if(!(adapter->flag & (1L << cmd->device->channel))) {
 992
 993                        printk(KERN_NOTICE
 994                                "scsi%d: scanning scsi channel %d [P%d] ",
 995                                        adapter->host->host_no,
 996                                        cmd->device->channel, channel);
 997                        printk("for physical devices.\n");
 998
 999                        adapter->flag |= (1L << cmd->device->channel);
1000                }
1001                /* Fall through */
1002        default:
1003                pthru->numsgelements = mega_build_sglist(adapter, scb,
1004                                &pthru->dataxferaddr, &pthru->dataxferlen);
1005                break;
1006        }
1007        return pthru;
1008}
1009
1010
1011/**
1012 * mega_prepare_extpassthru()
1013 * @adapter - pointer to our soft state
1014 * @scb - our scsi control block
1015 * @cmd - scsi command from the mid-layer
1016 * @channel - actual channel on the controller
1017 * @target - actual id on the controller.
1018 *
1019 * prepare a command for the scsi physical devices. This rountine prepares
1020 * commands for devices which can take extended CDBs (>10 bytes)
1021 */
1022static mega_ext_passthru *
1023mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
1024                int channel, int target)
1025{
1026        mega_ext_passthru       *epthru;
1027
1028        epthru = scb->epthru;
1029        memset(epthru, 0, sizeof(mega_ext_passthru));
1030
1031        /* 0=6sec/1=60sec/2=10min/3=3hrs */
1032        epthru->timeout = 2;
1033
1034        epthru->ars = 1;
1035        epthru->reqsenselen = 14;
1036        epthru->islogical = 0;
1037
1038        epthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
1039        epthru->target = (adapter->flag & BOARD_40LD) ?
1040                (channel << 4) | target : target;
1041
1042        epthru->cdblen = cmd->cmd_len;
1043        epthru->logdrv = cmd->device->lun;
1044
1045        memcpy(epthru->cdb, cmd->cmnd, cmd->cmd_len);
1046
1047        /* Not sure about the direction */
1048        scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
1049
1050        switch(cmd->cmnd[0]) {
1051        case INQUIRY:
1052        case READ_CAPACITY:
1053                if(!(adapter->flag & (1L << cmd->device->channel))) {
1054
1055                        printk(KERN_NOTICE
1056                                "scsi%d: scanning scsi channel %d [P%d] ",
1057                                        adapter->host->host_no,
1058                                        cmd->device->channel, channel);
1059                        printk("for physical devices.\n");
1060
1061                        adapter->flag |= (1L << cmd->device->channel);
1062                }
1063                /* Fall through */
1064        default:
1065                epthru->numsgelements = mega_build_sglist(adapter, scb,
1066                                &epthru->dataxferaddr, &epthru->dataxferlen);
1067                break;
1068        }
1069
1070        return epthru;
1071}
1072
1073static void
1074__mega_runpendq(adapter_t *adapter)
1075{
1076        scb_t *scb;
1077        struct list_head *pos, *next;
1078
1079        /* Issue any pending commands to the card */
1080        list_for_each_safe(pos, next, &adapter->pending_list) {
1081
1082                scb = list_entry(pos, scb_t, list);
1083
1084                if( !(scb->state & SCB_ISSUED) ) {
1085
1086                        if( issue_scb(adapter, scb) != 0 )
1087                                return;
1088                }
1089        }
1090
1091        return;
1092}
1093
1094
1095/**
1096 * issue_scb()
1097 * @adapter - pointer to our soft state
1098 * @scb - scsi control block
1099 *
1100 * Post a command to the card if the mailbox is available, otherwise return
1101 * busy. We also take the scb from the pending list if the mailbox is
1102 * available.
1103 */
1104static int
1105issue_scb(adapter_t *adapter, scb_t *scb)
1106{
1107        volatile mbox64_t       *mbox64 = adapter->mbox64;
1108        volatile mbox_t         *mbox = adapter->mbox;
1109        unsigned int    i = 0;
1110
1111        if(unlikely(mbox->m_in.busy)) {
1112                do {
1113                        udelay(1);
1114                        i++;
1115                } while( mbox->m_in.busy && (i < max_mbox_busy_wait) );
1116
1117                if(mbox->m_in.busy) return -1;
1118        }
1119
1120        /* Copy mailbox data into host structure */
1121        memcpy((char *)&mbox->m_out, (char *)scb->raw_mbox, 
1122                        sizeof(struct mbox_out));
1123
1124        mbox->m_out.cmdid = scb->idx;   /* Set cmdid */
1125        mbox->m_in.busy = 1;            /* Set busy */
1126
1127
1128        /*
1129         * Increment the pending queue counter
1130         */
1131        atomic_inc(&adapter->pend_cmds);
1132
1133        switch (mbox->m_out.cmd) {
1134        case MEGA_MBOXCMD_LREAD64:
1135        case MEGA_MBOXCMD_LWRITE64:
1136        case MEGA_MBOXCMD_PASSTHRU64:
1137        case MEGA_MBOXCMD_EXTPTHRU:
1138                mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1139                mbox64->xfer_segment_hi = 0;
1140                mbox->m_out.xferaddr = 0xFFFFFFFF;
1141                break;
1142        default:
1143                mbox64->xfer_segment_lo = 0;
1144                mbox64->xfer_segment_hi = 0;
1145        }
1146
1147        /*
1148         * post the command
1149         */
1150        scb->state |= SCB_ISSUED;
1151
1152        if( likely(adapter->flag & BOARD_MEMMAP) ) {
1153                mbox->m_in.poll = 0;
1154                mbox->m_in.ack = 0;
1155                WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1156        }
1157        else {
1158                irq_enable(adapter);
1159                issue_command(adapter);
1160        }
1161
1162        return 0;
1163}
1164
1165/*
1166 * Wait until the controller's mailbox is available
1167 */
1168static inline int
1169mega_busywait_mbox (adapter_t *adapter)
1170{
1171        if (adapter->mbox->m_in.busy)
1172                return __mega_busywait_mbox(adapter);
1173        return 0;
1174}
1175
1176/**
1177 * issue_scb_block()
1178 * @adapter - pointer to our soft state
1179 * @raw_mbox - the mailbox
1180 *
1181 * Issue a scb in synchronous and non-interrupt mode
1182 */
1183static int
1184issue_scb_block(adapter_t *adapter, u_char *raw_mbox)
1185{
1186        volatile mbox64_t *mbox64 = adapter->mbox64;
1187        volatile mbox_t *mbox = adapter->mbox;
1188        u8      byte;
1189
1190        /* Wait until mailbox is free */
1191        if(mega_busywait_mbox (adapter))
1192                goto bug_blocked_mailbox;
1193
1194        /* Copy mailbox data into host structure */
1195        memcpy((char *) mbox, raw_mbox, sizeof(struct mbox_out));
1196        mbox->m_out.cmdid = 0xFE;
1197        mbox->m_in.busy = 1;
1198
1199        switch (raw_mbox[0]) {
1200        case MEGA_MBOXCMD_LREAD64:
1201        case MEGA_MBOXCMD_LWRITE64:
1202        case MEGA_MBOXCMD_PASSTHRU64:
1203        case MEGA_MBOXCMD_EXTPTHRU:
1204                mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1205                mbox64->xfer_segment_hi = 0;
1206                mbox->m_out.xferaddr = 0xFFFFFFFF;
1207                break;
1208        default:
1209                mbox64->xfer_segment_lo = 0;
1210                mbox64->xfer_segment_hi = 0;
1211        }
1212
1213        if( likely(adapter->flag & BOARD_MEMMAP) ) {
1214                mbox->m_in.poll = 0;
1215                mbox->m_in.ack = 0;
1216                mbox->m_in.numstatus = 0xFF;
1217                mbox->m_in.status = 0xFF;
1218                WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1219
1220                while((volatile u8)mbox->m_in.numstatus == 0xFF)
1221                        cpu_relax();
1222
1223                mbox->m_in.numstatus = 0xFF;
1224
1225                while( (volatile u8)mbox->m_in.poll != 0x77 )
1226                        cpu_relax();
1227
1228                mbox->m_in.poll = 0;
1229                mbox->m_in.ack = 0x77;
1230
1231                WRINDOOR(adapter, adapter->mbox_dma | 0x2);
1232
1233                while(RDINDOOR(adapter) & 0x2)
1234                        cpu_relax();
1235        }
1236        else {
1237                irq_disable(adapter);
1238                issue_command(adapter);
1239
1240                while (!((byte = irq_state(adapter)) & INTR_VALID))
1241                        cpu_relax();
1242
1243                set_irq_state(adapter, byte);
1244                irq_enable(adapter);
1245                irq_ack(adapter);
1246        }
1247
1248        return mbox->m_in.status;
1249
1250bug_blocked_mailbox:
1251        printk(KERN_WARNING "megaraid: Blocked mailbox......!!\n");
1252        udelay (1000);
1253        return -1;
1254}
1255
1256
1257/**
1258 * megaraid_isr_iomapped()
1259 * @irq - irq
1260 * @devp - pointer to our soft state
1261 *
1262 * Interrupt service routine for io-mapped controllers.
1263 * Find out if our device is interrupting. If yes, acknowledge the interrupt
1264 * and service the completed commands.
1265 */
1266static irqreturn_t
1267megaraid_isr_iomapped(int irq, void *devp)
1268{
1269        adapter_t       *adapter = devp;
1270        unsigned long   flags;
1271        u8      status;
1272        u8      nstatus;
1273        u8      completed[MAX_FIRMWARE_STATUS];
1274        u8      byte;
1275        int     handled = 0;
1276
1277
1278        /*
1279         * loop till F/W has more commands for us to complete.
1280         */
1281        spin_lock_irqsave(&adapter->lock, flags);
1282
1283        do {
1284                /* Check if a valid interrupt is pending */
1285                byte = irq_state(adapter);
1286                if( (byte & VALID_INTR_BYTE) == 0 ) {
1287                        /*
1288                         * No more pending commands
1289                         */
1290                        goto out_unlock;
1291                }
1292                set_irq_state(adapter, byte);
1293
1294                while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1295                                == 0xFF)
1296                        cpu_relax();
1297                adapter->mbox->m_in.numstatus = 0xFF;
1298
1299                status = adapter->mbox->m_in.status;
1300
1301                /*
1302                 * decrement the pending queue counter
1303                 */
1304                atomic_sub(nstatus, &adapter->pend_cmds);
1305
1306                memcpy(completed, (void *)adapter->mbox->m_in.completed, 
1307                                nstatus);
1308
1309                /* Acknowledge interrupt */
1310                irq_ack(adapter);
1311
1312                mega_cmd_done(adapter, completed, nstatus, status);
1313
1314                mega_rundoneq(adapter);
1315
1316                handled = 1;
1317
1318                /* Loop through any pending requests */
1319                if(atomic_read(&adapter->quiescent) == 0) {
1320                        mega_runpendq(adapter);
1321                }
1322
1323        } while(1);
1324
1325 out_unlock:
1326
1327        spin_unlock_irqrestore(&adapter->lock, flags);
1328
1329        return IRQ_RETVAL(handled);
1330}
1331
1332
1333/**
1334 * megaraid_isr_memmapped()
1335 * @irq - irq
1336 * @devp - pointer to our soft state
1337 *
1338 * Interrupt service routine for memory-mapped controllers.
1339 * Find out if our device is interrupting. If yes, acknowledge the interrupt
1340 * and service the completed commands.
1341 */
1342static irqreturn_t
1343megaraid_isr_memmapped(int irq, void *devp)
1344{
1345        adapter_t       *adapter = devp;
1346        unsigned long   flags;
1347        u8      status;
1348        u32     dword = 0;
1349        u8      nstatus;
1350        u8      completed[MAX_FIRMWARE_STATUS];
1351        int     handled = 0;
1352
1353
1354        /*
1355         * loop till F/W has more commands for us to complete.
1356         */
1357        spin_lock_irqsave(&adapter->lock, flags);
1358
1359        do {
1360                /* Check if a valid interrupt is pending */
1361                dword = RDOUTDOOR(adapter);
1362                if(dword != 0x10001234) {
1363                        /*
1364                         * No more pending commands
1365                         */
1366                        goto out_unlock;
1367                }
1368                WROUTDOOR(adapter, 0x10001234);
1369
1370                while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1371                                == 0xFF) {
1372                        cpu_relax();
1373                }
1374                adapter->mbox->m_in.numstatus = 0xFF;
1375
1376                status = adapter->mbox->m_in.status;
1377
1378                /*
1379                 * decrement the pending queue counter
1380                 */
1381                atomic_sub(nstatus, &adapter->pend_cmds);
1382
1383                memcpy(completed, (void *)adapter->mbox->m_in.completed, 
1384                                nstatus);
1385
1386                /* Acknowledge interrupt */
1387                WRINDOOR(adapter, 0x2);
1388
1389                handled = 1;
1390
1391                while( RDINDOOR(adapter) & 0x02 )
1392                        cpu_relax();
1393
1394                mega_cmd_done(adapter, completed, nstatus, status);
1395
1396                mega_rundoneq(adapter);
1397
1398                /* Loop through any pending requests */
1399                if(atomic_read(&adapter->quiescent) == 0) {
1400                        mega_runpendq(adapter);
1401                }
1402
1403        } while(1);
1404
1405 out_unlock:
1406
1407        spin_unlock_irqrestore(&adapter->lock, flags);
1408
1409        return IRQ_RETVAL(handled);
1410}
1411/**
1412 * mega_cmd_done()
1413 * @adapter - pointer to our soft state
1414 * @completed - array of ids of completed commands
1415 * @nstatus - number of completed commands
1416 * @status - status of the last command completed
1417 *
1418 * Complete the commands and call the scsi mid-layer callback hooks.
1419 */
1420static void
1421mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status)
1422{
1423        mega_ext_passthru       *epthru = NULL;
1424        struct scatterlist      *sgl;
1425        Scsi_Cmnd       *cmd = NULL;
1426        mega_passthru   *pthru = NULL;
1427        mbox_t  *mbox = NULL;
1428        u8      c;
1429        scb_t   *scb;
1430        int     islogical;
1431        int     cmdid;
1432        int     i;
1433
1434        /*
1435         * for all the commands completed, call the mid-layer callback routine
1436         * and free the scb.
1437         */
1438        for( i = 0; i < nstatus; i++ ) {
1439
1440                cmdid = completed[i];
1441
1442                if( cmdid == CMDID_INT_CMDS ) { /* internal command */
1443                        scb = &adapter->int_scb;
1444                        cmd = scb->cmd;
1445                        mbox = (mbox_t *)scb->raw_mbox;
1446
1447                        /*
1448                         * Internal command interface do not fire the extended
1449                         * passthru or 64-bit passthru
1450                         */
1451                        pthru = scb->pthru;
1452
1453                }
1454                else {
1455                        scb = &adapter->scb_list[cmdid];
1456
1457                        /*
1458                         * Make sure f/w has completed a valid command
1459                         */
1460                        if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
1461                                printk(KERN_CRIT
1462                                        "megaraid: invalid command ");
1463                                printk("Id %d, scb->state:%x, scsi cmd:%p\n",
1464                                        cmdid, scb->state, scb->cmd);
1465
1466                                continue;
1467                        }
1468
1469                        /*
1470                         * Was a abort issued for this command
1471                         */
1472                        if( scb->state & SCB_ABORT ) {
1473
1474                                printk(KERN_WARNING
1475                                "megaraid: aborted cmd [%x] complete.\n",
1476                                        scb->idx);
1477
1478                                scb->cmd->result = (DID_ABORT << 16);
1479
1480                                list_add_tail(SCSI_LIST(scb->cmd),
1481                                                &adapter->completed_list);
1482
1483                                mega_free_scb(adapter, scb);
1484
1485                                continue;
1486                        }
1487
1488                        /*
1489                         * Was a reset issued for this command
1490                         */
1491                        if( scb->state & SCB_RESET ) {
1492
1493                                printk(KERN_WARNING
1494                                "megaraid: reset cmd [%x] complete.\n",
1495                                        scb->idx);
1496
1497                                scb->cmd->result = (DID_RESET << 16);
1498
1499                                list_add_tail(SCSI_LIST(scb->cmd),
1500                                                &adapter->completed_list);
1501
1502                                mega_free_scb (adapter, scb);
1503
1504                                continue;
1505                        }
1506
1507                        cmd = scb->cmd;
1508                        pthru = scb->pthru;
1509                        epthru = scb->epthru;
1510                        mbox = (mbox_t *)scb->raw_mbox;
1511
1512#if MEGA_HAVE_STATS
1513                        {
1514
1515                        int     logdrv = mbox->m_out.logdrv;
1516
1517                        islogical = adapter->logdrv_chan[cmd->channel];
1518                        /*
1519                         * Maintain an error counter for the logical drive.
1520                         * Some application like SNMP agent need such
1521                         * statistics
1522                         */
1523                        if( status && islogical && (cmd->cmnd[0] == READ_6 ||
1524                                                cmd->cmnd[0] == READ_10 ||
1525                                                cmd->cmnd[0] == READ_12)) {
1526                                /*
1527                                 * Logical drive number increases by 0x80 when
1528                                 * a logical drive is deleted
1529                                 */
1530                                adapter->rd_errors[logdrv%0x80]++;
1531                        }
1532
1533                        if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
1534                                                cmd->cmnd[0] == WRITE_10 ||
1535                                                cmd->cmnd[0] == WRITE_12)) {
1536                                /*
1537                                 * Logical drive number increases by 0x80 when
1538                                 * a logical drive is deleted
1539                                 */
1540                                adapter->wr_errors[logdrv%0x80]++;
1541                        }
1542
1543                        }
1544#endif
1545                }
1546
1547                /*
1548                 * Do not return the presence of hard disk on the channel so,
1549                 * inquiry sent, and returned data==hard disk or removable
1550                 * hard disk and not logical, request should return failure! -
1551                 * PJ
1552                 */
1553                islogical = adapter->logdrv_chan[cmd->device->channel];
1554                if( cmd->cmnd[0] == INQUIRY && !islogical ) {
1555
1556                        sgl = scsi_sglist(cmd);
1557                        if( sg_page(sgl) ) {
1558                                c = *(unsigned char *) sg_virt(&sgl[0]);
1559                        } else {
1560                                printk(KERN_WARNING
1561                                       "megaraid: invalid sg.\n");
1562                                c = 0;
1563                        }
1564
1565                        if(IS_RAID_CH(adapter, cmd->device->channel) &&
1566                                        ((c & 0x1F ) == TYPE_DISK)) {
1567                                status = 0xF0;
1568                        }
1569                }
1570
1571                /* clear result; otherwise, success returns corrupt value */
1572                cmd->result = 0;
1573
1574                /* Convert MegaRAID status to Linux error code */
1575                switch (status) {
1576                case 0x00:      /* SUCCESS , i.e. SCSI_STATUS_GOOD */
1577                        cmd->result |= (DID_OK << 16);
1578                        break;
1579
1580                case 0x02:      /* ERROR_ABORTED, i.e.
1581                                   SCSI_STATUS_CHECK_CONDITION */
1582
1583                        /* set sense_buffer and result fields */
1584                        if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
1585                                mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
1586
1587                                memcpy(cmd->sense_buffer, pthru->reqsensearea,
1588                                                14);
1589
1590                                cmd->result = (DRIVER_SENSE << 24) |
1591                                        (DID_OK << 16) |
1592                                        (CHECK_CONDITION << 1);
1593                        }
1594                        else {
1595                                if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
1596
1597                                        memcpy(cmd->sense_buffer,
1598                                                epthru->reqsensearea, 14);
1599
1600                                        cmd->result = (DRIVER_SENSE << 24) |
1601                                                (DID_OK << 16) |
1602                                                (CHECK_CONDITION << 1);
1603                                } else {
1604                                        cmd->sense_buffer[0] = 0x70;
1605                                        cmd->sense_buffer[2] = ABORTED_COMMAND;
1606                                        cmd->result |= (CHECK_CONDITION << 1);
1607                                }
1608                        }
1609                        break;
1610
1611                case 0x08:      /* ERR_DEST_DRIVE_FAILED, i.e.
1612                                   SCSI_STATUS_BUSY */
1613                        cmd->result |= (DID_BUS_BUSY << 16) | status;
1614                        break;
1615
1616                default:
1617#if MEGA_HAVE_CLUSTERING
1618                        /*
1619                         * If TEST_UNIT_READY fails, we know
1620                         * MEGA_RESERVATION_STATUS failed
1621                         */
1622                        if( cmd->cmnd[0] == TEST_UNIT_READY ) {
1623                                cmd->result |= (DID_ERROR << 16) |
1624                                        (RESERVATION_CONFLICT << 1);
1625                        }
1626                        else
1627                        /*
1628                         * Error code returned is 1 if Reserve or Release
1629                         * failed or the input parameter is invalid
1630                         */
1631                        if( status == 1 &&
1632                                (cmd->cmnd[0] == RESERVE ||
1633                                         cmd->cmnd[0] == RELEASE) ) {
1634
1635                                cmd->result |= (DID_ERROR << 16) |
1636                                        (RESERVATION_CONFLICT << 1);
1637                        }
1638                        else
1639#endif
1640                                cmd->result |= (DID_BAD_TARGET << 16)|status;
1641                }
1642
1643                /*
1644                 * Only free SCBs for the commands coming down from the
1645                 * mid-layer, not for which were issued internally
1646                 *
1647                 * For internal command, restore the status returned by the
1648                 * firmware so that user can interpret it.
1649                 */
1650                if( cmdid == CMDID_INT_CMDS ) { /* internal command */
1651                        cmd->result = status;
1652
1653                        /*
1654                         * Remove the internal command from the pending list
1655                         */
1656                        list_del_init(&scb->list);
1657                        scb->state = SCB_FREE;
1658                }
1659                else {
1660                        mega_free_scb(adapter, scb);
1661                }
1662
1663                /* Add Scsi_Command to end of completed queue */
1664                list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
1665        }
1666}
1667
1668
1669/*
1670 * mega_runpendq()
1671 *
1672 * Run through the list of completed requests and finish it
1673 */
1674static void
1675mega_rundoneq (adapter_t *adapter)
1676{
1677        Scsi_Cmnd *cmd;
1678        struct list_head *pos;
1679
1680        list_for_each(pos, &adapter->completed_list) {
1681
1682                struct scsi_pointer* spos = (struct scsi_pointer *)pos;
1683
1684                cmd = list_entry(spos, Scsi_Cmnd, SCp);
1685                cmd->scsi_done(cmd);
1686        }
1687
1688        INIT_LIST_HEAD(&adapter->completed_list);
1689}
1690
1691
1692/*
1693 * Free a SCB structure
1694 * Note: We assume the scsi commands associated with this scb is not free yet.
1695 */
1696static void
1697mega_free_scb(adapter_t *adapter, scb_t *scb)
1698{
1699        switch( scb->dma_type ) {
1700
1701        case MEGA_DMA_TYPE_NONE:
1702                break;
1703
1704        case MEGA_SGLIST:
1705                scsi_dma_unmap(scb->cmd);
1706                break;
1707        default:
1708                break;
1709        }
1710
1711        /*
1712         * Remove from the pending list
1713         */
1714        list_del_init(&scb->list);
1715
1716        /* Link the scb back into free list */
1717        scb->state = SCB_FREE;
1718        scb->cmd = NULL;
1719
1720        list_add(&scb->list, &adapter->free_list);
1721}
1722
1723
1724static int
1725__mega_busywait_mbox (adapter_t *adapter)
1726{
1727        volatile mbox_t *mbox = adapter->mbox;
1728        long counter;
1729
1730        for (counter = 0; counter < 10000; counter++) {
1731                if (!mbox->m_in.busy)
1732                        return 0;
1733                udelay(100);
1734                cond_resched();
1735        }
1736        return -1;              /* give up after 1 second */
1737}
1738
1739/*
1740 * Copies data to SGLIST
1741 * Note: For 64 bit cards, we need a minimum of one SG element for read/write
1742 */
1743static int
1744mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
1745{
1746        struct scatterlist *sg;
1747        Scsi_Cmnd       *cmd;
1748        int     sgcnt;
1749        int     idx;
1750
1751        cmd = scb->cmd;
1752
1753        /*
1754         * Copy Scatter-Gather list info into controller structure.
1755         *
1756         * The number of sg elements returned must not exceed our limit
1757         */
1758        sgcnt = scsi_dma_map(cmd);
1759
1760        scb->dma_type = MEGA_SGLIST;
1761
1762        BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);
1763
1764        *len = 0;
1765
1766        if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
1767                sg = scsi_sglist(cmd);
1768                scb->dma_h_bulkdata = sg_dma_address(sg);
1769                *buf = (u32)scb->dma_h_bulkdata;
1770                *len = sg_dma_len(sg);
1771                return 0;
1772        }
1773
1774        scsi_for_each_sg(cmd, sg, sgcnt, idx) {
1775                if (adapter->has_64bit_addr) {
1776                        scb->sgl64[idx].address = sg_dma_address(sg);
1777                        *len += scb->sgl64[idx].length = sg_dma_len(sg);
1778                } else {
1779                        scb->sgl[idx].address = sg_dma_address(sg);
1780                        *len += scb->sgl[idx].length = sg_dma_len(sg);
1781                }
1782        }
1783
1784        /* Reset pointer and length fields */
1785        *buf = scb->sgl_dma_addr;
1786
1787        /* Return count of SG requests */
1788        return sgcnt;
1789}
1790
1791
1792/*
1793 * mega_8_to_40ld()
1794 *
1795 * takes all info in AdapterInquiry structure and puts it into ProductInfo and
1796 * Enquiry3 structures for later use
1797 */
1798static void
1799mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
1800                mega_product_info *product_info)
1801{
1802        int i;
1803
1804        product_info->max_commands = inquiry->adapter_info.max_commands;
1805        enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
1806        product_info->nchannels = inquiry->adapter_info.nchannels;
1807
1808        for (i = 0; i < 4; i++) {
1809                product_info->fw_version[i] =
1810                        inquiry->adapter_info.fw_version[i];
1811
1812                product_info->bios_version[i] =
1813                        inquiry->adapter_info.bios_version[i];
1814        }
1815        enquiry3->cache_flush_interval =
1816                inquiry->adapter_info.cache_flush_interval;
1817
1818        product_info->dram_size = inquiry->adapter_info.dram_size;
1819
1820        enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
1821
1822        for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
1823                enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
1824                enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
1825                enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
1826        }
1827
1828        for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
1829                enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
1830}
1831
1832static inline void
1833mega_free_sgl(adapter_t *adapter)
1834{
1835        scb_t   *scb;
1836        int     i;
1837
1838        for(i = 0; i < adapter->max_cmds; i++) {
1839
1840                scb = &adapter->scb_list[i];
1841
1842                if( scb->sgl64 ) {
1843                        pci_free_consistent(adapter->dev,
1844                                sizeof(mega_sgl64) * adapter->sglen,
1845                                scb->sgl64,
1846                                scb->sgl_dma_addr);
1847
1848                        scb->sgl64 = NULL;
1849                }
1850
1851                if( scb->pthru ) {
1852                        pci_free_consistent(adapter->dev, sizeof(mega_passthru),
1853                                scb->pthru, scb->pthru_dma_addr);
1854
1855                        scb->pthru = NULL;
1856                }
1857
1858                if( scb->epthru ) {
1859                        pci_free_consistent(adapter->dev,
1860                                sizeof(mega_ext_passthru),
1861                                scb->epthru, scb->epthru_dma_addr);
1862
1863                        scb->epthru = NULL;
1864                }
1865
1866        }
1867}
1868
1869
1870/*
1871 * Get information about the card/driver
1872 */
1873const char *
1874megaraid_info(struct Scsi_Host *host)
1875{
1876        static char buffer[512];
1877        adapter_t *adapter;
1878
1879        adapter = (adapter_t *)host->hostdata;
1880
1881        sprintf (buffer,
1882                 "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
1883                 adapter->fw_version, adapter->product_info.max_commands,
1884                 adapter->host->max_id, adapter->host->max_channel,
1885                 adapter->host->max_lun);
1886        return buffer;
1887}
1888
1889/*
1890 * Abort a previous SCSI request. Only commands on the pending list can be
1891 * aborted. All the commands issued to the F/W must complete.
1892 */
1893static int
1894megaraid_abort(Scsi_Cmnd *cmd)
1895{
1896        adapter_t       *adapter;
1897        int             rval;
1898
1899        adapter = (adapter_t *)cmd->device->host->hostdata;
1900
1901        rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
1902
1903        /*
1904         * This is required here to complete any completed requests
1905         * to be communicated over to the mid layer.
1906         */
1907        mega_rundoneq(adapter);
1908
1909        return rval;
1910}
1911
1912
1913static int
1914megaraid_reset(struct scsi_cmnd *cmd)
1915{
1916        adapter_t       *adapter;
1917        megacmd_t       mc;
1918        int             rval;
1919
1920        adapter = (adapter_t *)cmd->device->host->hostdata;
1921
1922#if MEGA_HAVE_CLUSTERING
1923        mc.cmd = MEGA_CLUSTER_CMD;
1924        mc.opcode = MEGA_RESET_RESERVATIONS;
1925
1926        if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
1927                printk(KERN_WARNING
1928                                "megaraid: reservation reset failed.\n");
1929        }
1930        else {
1931                printk(KERN_INFO "megaraid: reservation reset.\n");
1932        }
1933#endif
1934
1935        spin_lock_irq(&adapter->lock);
1936
1937        rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
1938
1939        /*
1940         * This is required here to complete any completed requests
1941         * to be communicated over to the mid layer.
1942         */
1943        mega_rundoneq(adapter);
1944        spin_unlock_irq(&adapter->lock);
1945
1946        return rval;
1947}
1948
1949/**
1950 * megaraid_abort_and_reset()
1951 * @adapter - megaraid soft state
1952 * @cmd - scsi command to be aborted or reset
1953 * @aor - abort or reset flag
1954 *
1955 * Try to locate the scsi command in the pending queue. If found and is not
1956 * issued to the controller, abort/reset it. Otherwise return failure
1957 */
1958static int
1959megaraid_abort_and_reset(adapter_t *adapter, Scsi_Cmnd *cmd, int aor)
1960{
1961        struct list_head        *pos, *next;
1962        scb_t                   *scb;
1963
1964        printk(KERN_WARNING "megaraid: %s cmd=%x <c=%d t=%d l=%d>\n",
1965             (aor == SCB_ABORT)? "ABORTING":"RESET",
1966             cmd->cmnd[0], cmd->device->channel, 
1967             cmd->device->id, cmd->device->lun);
1968
1969        if(list_empty(&adapter->pending_list))
1970                return FALSE;
1971
1972        list_for_each_safe(pos, next, &adapter->pending_list) {
1973
1974                scb = list_entry(pos, scb_t, list);
1975
1976                if (scb->cmd == cmd) { /* Found command */
1977
1978                        scb->state |= aor;
1979
1980                        /*
1981                         * Check if this command has firmware ownership. If
1982                         * yes, we cannot reset this command. Whenever f/w
1983                         * completes this command, we will return appropriate
1984                         * status from ISR.
1985                         */
1986                        if( scb->state & SCB_ISSUED ) {
1987
1988                                printk(KERN_WARNING
1989                                        "megaraid: %s[%x], fw owner.\n",
1990                                        (aor==SCB_ABORT) ? "ABORTING":"RESET",
1991                                        scb->idx);
1992
1993                                return FALSE;
1994                        }
1995                        else {
1996
1997                                /*
1998                                 * Not yet issued! Remove from the pending
1999                                 * list
2000                                 */
2001                                printk(KERN_WARNING
2002                                        "megaraid: %s-[%x], driver owner.\n",
2003                                        (aor==SCB_ABORT) ? "ABORTING":"RESET",
2004                                        scb->idx);
2005
2006                                mega_free_scb(adapter, scb);
2007
2008                                if( aor == SCB_ABORT ) {
2009                                        cmd->result = (DID_ABORT << 16);
2010                                }
2011                                else {
2012                                        cmd->result = (DID_RESET << 16);
2013                                }
2014
2015                                list_add_tail(SCSI_LIST(cmd),
2016                                                &adapter->completed_list);
2017
2018                                return TRUE;
2019                        }
2020                }
2021        }
2022
2023        return FALSE;
2024}
2025
2026static inline int
2027make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
2028{
2029        *pdev = alloc_pci_dev();
2030
2031        if( *pdev == NULL ) return -1;
2032
2033        memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
2034
2035        if( pci_set_dma_mask(*pdev, DMA_BIT_MASK(32)) != 0 ) {
2036                kfree(*pdev);
2037                return -1;
2038        }
2039
2040        return 0;
2041}
2042
2043static inline void
2044free_local_pdev(struct pci_dev *pdev)
2045{
2046        kfree(pdev);
2047}
2048
2049/**
2050 * mega_allocate_inquiry()
2051 * @dma_handle - handle returned for dma address
2052 * @pdev - handle to pci device
2053 *
2054 * allocates memory for inquiry structure
2055 */
2056static inline void *
2057mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
2058{
2059        return pci_alloc_consistent(pdev, sizeof(mega_inquiry3), dma_handle);
2060}
2061
2062
2063static inline void
2064mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
2065{
2066        pci_free_consistent(pdev, sizeof(mega_inquiry3), inquiry, dma_handle);
2067}
2068
2069
2070#ifdef CONFIG_PROC_FS
2071/* Following code handles /proc fs  */
2072
2073#define CREATE_READ_PROC(string, func)  create_proc_read_entry(string,  \
2074                                        S_IRUSR | S_IFREG,              \
2075                                        controller_proc_dir_entry,      \
2076                                        func, adapter)
2077
2078/**
2079 * mega_create_proc_entry()
2080 * @index - index in soft state array
2081 * @parent - parent node for this /proc entry
2082 *
2083 * Creates /proc entries for our controllers.
2084 */
2085static void
2086mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2087{
2088        struct proc_dir_entry   *controller_proc_dir_entry = NULL;
2089        u8              string[64] = { 0 };
2090        adapter_t       *adapter = hba_soft_state[index];
2091
2092        sprintf(string, "hba%d", adapter->host->host_no);
2093
2094        controller_proc_dir_entry =
2095                adapter->controller_proc_dir_entry = proc_mkdir(string, parent);
2096
2097        if(!controller_proc_dir_entry) {
2098                printk(KERN_WARNING "\nmegaraid: proc_mkdir failed\n");
2099                return;
2100        }
2101        adapter->proc_read = CREATE_READ_PROC("config", proc_read_config);
2102        adapter->proc_stat = CREATE_READ_PROC("stat", proc_read_stat);
2103        adapter->proc_mbox = CREATE_READ_PROC("mailbox", proc_read_mbox);
2104#if MEGA_HAVE_ENH_PROC
2105        adapter->proc_rr = CREATE_READ_PROC("rebuild-rate", proc_rebuild_rate);
2106        adapter->proc_battery = CREATE_READ_PROC("battery-status",
2107                        proc_battery);
2108
2109        /*
2110         * Display each physical drive on its channel
2111         */
2112        adapter->proc_pdrvstat[0] = CREATE_READ_PROC("diskdrives-ch0",
2113                                        proc_pdrv_ch0);
2114        adapter->proc_pdrvstat[1] = CREATE_READ_PROC("diskdrives-ch1",
2115                                        proc_pdrv_ch1);
2116        adapter->proc_pdrvstat[2] = CREATE_READ_PROC("diskdrives-ch2",
2117                                        proc_pdrv_ch2);
2118        adapter->proc_pdrvstat[3] = CREATE_READ_PROC("diskdrives-ch3",
2119                                        proc_pdrv_ch3);
2120
2121        /*
2122         * Display a set of up to 10 logical drive through each of following
2123         * /proc entries
2124         */
2125        adapter->proc_rdrvstat[0] = CREATE_READ_PROC("raiddrives-0-9",
2126                                        proc_rdrv_10);
2127        adapter->proc_rdrvstat[1] = CREATE_READ_PROC("raiddrives-10-19",
2128                                        proc_rdrv_20);
2129        adapter->proc_rdrvstat[2] = CREATE_READ_PROC("raiddrives-20-29",
2130                                        proc_rdrv_30);
2131        adapter->proc_rdrvstat[3] = CREATE_READ_PROC("raiddrives-30-39",
2132                                        proc_rdrv_40);
2133#endif
2134}
2135
2136
2137/**
2138 * proc_read_config()
2139 * @page - buffer to write the data in
2140 * @start - where the actual data has been written in page
2141 * @offset - same meaning as the read system call
2142 * @count - same meaning as the read system call
2143 * @eof - set if no more data needs to be returned
2144 * @data - pointer to our soft state
2145 *
2146 * Display configuration information about the controller.
2147 */
2148static int
2149proc_read_config(char *page, char **start, off_t offset, int count, int *eof,
2150                void *data)
2151{
2152
2153        adapter_t *adapter = (adapter_t *)data;
2154        int len = 0;
2155
2156        len += sprintf(page+len, "%s", MEGARAID_VERSION);
2157
2158        if(adapter->product_info.product_name[0])
2159                len += sprintf(page+len, "%s\n",
2160                                adapter->product_info.product_name);
2161
2162        len += sprintf(page+len, "Controller Type: ");
2163
2164        if( adapter->flag & BOARD_MEMMAP ) {
2165                len += sprintf(page+len,
2166                        "438/466/467/471/493/518/520/531/532\n");
2167        }
2168        else {
2169                len += sprintf(page+len,
2170                        "418/428/434\n");
2171        }
2172
2173        if(adapter->flag & BOARD_40LD) {
2174                len += sprintf(page+len,
2175                                "Controller Supports 40 Logical Drives\n");
2176        }
2177
2178        if(adapter->flag & BOARD_64BIT) {
2179                len += sprintf(page+len,
2180                "Controller capable of 64-bit memory addressing\n");
2181        }
2182        if( adapter->has_64bit_addr ) {
2183                len += sprintf(page+len,
2184                        "Controller using 64-bit memory addressing\n");
2185        }
2186        else {
2187                len += sprintf(page+len,
2188                        "Controller is not using 64-bit memory addressing\n");
2189        }
2190
2191        len += sprintf(page+len, "Base = %08lx, Irq = %d, ", adapter->base,
2192                        adapter->host->irq);
2193
2194        len += sprintf(page+len, "Logical Drives = %d, Channels = %d\n",
2195                        adapter->numldrv, adapter->product_info.nchannels);
2196
2197        len += sprintf(page+len, "Version =%s:%s, DRAM = %dMb\n",
2198                        adapter->fw_version, adapter->bios_version,
2199                        adapter->product_info.dram_size);
2200
2201        len += sprintf(page+len,
2202                "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
2203                adapter->product_info.max_commands, adapter->max_cmds);
2204
2205        len += sprintf(page+len, "support_ext_cdb    = %d\n",
2206                        adapter->support_ext_cdb);
2207        len += sprintf(page+len, "support_random_del = %d\n",
2208                        adapter->support_random_del);
2209        len += sprintf(page+len, "boot_ldrv_enabled  = %d\n",
2210                        adapter->boot_ldrv_enabled);
2211        len += sprintf(page+len, "boot_ldrv          = %d\n",
2212                        adapter->boot_ldrv);
2213        len += sprintf(page+len, "boot_pdrv_enabled  = %d\n",
2214                        adapter->boot_pdrv_enabled);
2215        len += sprintf(page+len, "boot_pdrv_ch       = %d\n",
2216                        adapter->boot_pdrv_ch);
2217        len += sprintf(page+len, "boot_pdrv_tgt      = %d\n",
2218                        adapter->boot_pdrv_tgt);
2219        len += sprintf(page+len, "quiescent          = %d\n",
2220                        atomic_read(&adapter->quiescent));
2221        len += sprintf(page+len, "has_cluster        = %d\n",
2222                        adapter->has_cluster);
2223
2224        len += sprintf(page+len, "\nModule Parameters:\n");
2225        len += sprintf(page+len, "max_cmd_per_lun    = %d\n",
2226                        max_cmd_per_lun);
2227        len += sprintf(page+len, "max_sectors_per_io = %d\n",
2228                        max_sectors_per_io);
2229
2230        *eof = 1;
2231
2232        return len;
2233}
2234
2235
2236
2237/**
2238 * proc_read_stat()
2239 * @page - buffer to write the data in
2240 * @start - where the actual data has been written in page
2241 * @offset - same meaning as the read system call
2242 * @count - same meaning as the read system call
2243 * @eof - set if no more data needs to be returned
2244 * @data - pointer to our soft state
2245 *
2246 * Diaplay statistical information about the I/O activity.
2247 */
2248static int
2249proc_read_stat(char *page, char **start, off_t offset, int count, int *eof,
2250                void *data)
2251{
2252        adapter_t       *adapter;
2253        int     len;
2254        int     i;
2255
2256        i = 0;  /* avoid compilation warnings */
2257        len = 0;
2258        adapter = (adapter_t *)data;
2259
2260        len = sprintf(page, "Statistical Information for this controller\n");
2261        len += sprintf(page+len, "pend_cmds = %d\n",
2262                        atomic_read(&adapter->pend_cmds));
2263#if MEGA_HAVE_STATS
2264        for(i = 0; i < adapter->numldrv; i++) {
2265                len += sprintf(page+len, "Logical Drive %d:\n", i);
2266
2267                len += sprintf(page+len,
2268                        "\tReads Issued = %lu, Writes Issued = %lu\n",
2269                        adapter->nreads[i], adapter->nwrites[i]);
2270
2271                len += sprintf(page+len,
2272                        "\tSectors Read = %lu, Sectors Written = %lu\n",
2273                        adapter->nreadblocks[i], adapter->nwriteblocks[i]);
2274
2275                len += sprintf(page+len,
2276                        "\tRead errors = %lu, Write errors = %lu\n\n",
2277                        adapter->rd_errors[i], adapter->wr_errors[i]);
2278        }
2279#else
2280        len += sprintf(page+len,
2281                        "IO and error counters not compiled in driver.\n");
2282#endif
2283
2284        *eof = 1;
2285
2286        return len;
2287}
2288
2289
2290/**
2291 * proc_read_mbox()
2292 * @page - buffer to write the data in
2293 * @start - where the actual data has been written in page
2294 * @offset - same meaning as the read system call
2295 * @count - same meaning as the read system call
2296 * @eof - set if no more data needs to be returned
2297 * @data - pointer to our soft state
2298 *
2299 * Display mailbox information for the last command issued. This information
2300 * is good for debugging.
2301 */
2302static int
2303proc_read_mbox(char *page, char **start, off_t offset, int count, int *eof,
2304                void *data)
2305{
2306
2307        adapter_t       *adapter = (adapter_t *)data;
2308        volatile mbox_t *mbox = adapter->mbox;
2309        int     len = 0;
2310
2311        len = sprintf(page, "Contents of Mail Box Structure\n");
2312        len += sprintf(page+len, "  Fw Command   = 0x%02x\n", 
2313                        mbox->m_out.cmd);
2314        len += sprintf(page+len, "  Cmd Sequence = 0x%02x\n", 
2315                        mbox->m_out.cmdid);
2316        len += sprintf(page+len, "  No of Sectors= %04d\n", 
2317                        mbox->m_out.numsectors);
2318        len += sprintf(page+len, "  LBA          = 0x%02x\n", 
2319                        mbox->m_out.lba);
2320        len += sprintf(page+len, "  DTA          = 0x%08x\n", 
2321                        mbox->m_out.xferaddr);
2322        len += sprintf(page+len, "  Logical Drive= 0x%02x\n", 
2323                        mbox->m_out.logdrv);
2324        len += sprintf(page+len, "  No of SG Elmt= 0x%02x\n",
2325                        mbox->m_out.numsgelements);
2326        len += sprintf(page+len, "  Busy         = %01x\n", 
2327                        mbox->m_in.busy);
2328        len += sprintf(page+len, "  Status       = 0x%02x\n", 
2329                        mbox->m_in.status);
2330
2331        *eof = 1;
2332
2333        return len;
2334}
2335
2336
2337/**
2338 * proc_rebuild_rate()
2339 * @page - buffer to write the data in
2340 * @start - where the actual data has been written in page
2341 * @offset - same meaning as the read system call
2342 * @count - same meaning as the read system call
2343 * @eof - set if no more data needs to be returned
2344 * @data - pointer to our soft state
2345 *
2346 * Display current rebuild rate
2347 */
2348static int
2349proc_rebuild_rate(char *page, char **start, off_t offset, int count, int *eof,
2350                void *data)
2351{
2352        adapter_t       *adapter = (adapter_t *)data;
2353        dma_addr_t      dma_handle;
2354        caddr_t         inquiry;
2355        struct pci_dev  *pdev;
2356        int     len = 0;
2357
2358        if( make_local_pdev(adapter, &pdev) != 0 ) {
2359                *eof = 1;
2360                return len;
2361        }
2362
2363        if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
2364                free_local_pdev(pdev);
2365                *eof = 1;
2366                return len;
2367        }
2368
2369        if( mega_adapinq(adapter, dma_handle) != 0 ) {
2370
2371                len = sprintf(page, "Adapter inquiry failed.\n");
2372
2373                printk(KERN_WARNING "megaraid: inquiry failed.\n");
2374
2375                mega_free_inquiry(inquiry, dma_handle, pdev);
2376
2377                free_local_pdev(pdev);
2378
2379                *eof = 1;
2380
2381                return len;
2382        }
2383
2384        if( adapter->flag & BOARD_40LD ) {
2385                len = sprintf(page, "Rebuild Rate: [%d%%]\n",
2386                        ((mega_inquiry3 *)inquiry)->rebuild_rate);
2387        }
2388        else {
2389                len = sprintf(page, "Rebuild Rate: [%d%%]\n",
2390                        ((mraid_ext_inquiry *)
2391                        inquiry)->raid_inq.adapter_info.rebuild_rate);
2392        }
2393
2394
2395        mega_free_inquiry(inquiry, dma_handle, pdev);
2396
2397        free_local_pdev(pdev);
2398
2399        *eof = 1;
2400
2401        return len;
2402}
2403
2404
2405/**
2406 * proc_battery()
2407 * @page - buffer to write the data in
2408 * @start - where the actual data has been written in page
2409 * @offset - same meaning as the read system call
2410 * @count - same meaning as the read system call
2411 * @eof - set if no more data needs to be returned
2412 * @data - pointer to our soft state
2413 *
2414 * Display information about the battery module on the controller.
2415 */
2416static int
2417proc_battery(char *page, char **start, off_t offset, int count, int *eof,
2418                void *data)
2419{
2420        adapter_t       *adapter = (adapter_t *)data;
2421        dma_addr_t      dma_handle;
2422        caddr_t         inquiry;
2423        struct pci_dev  *pdev;
2424        u8      battery_status = 0;
2425        char    str[256];
2426        int     len = 0;
2427
2428        if( make_local_pdev(adapter, &pdev) != 0 ) {
2429                *eof = 1;
2430                return len;
2431        }
2432
2433        if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
2434                free_local_pdev(pdev);
2435                *eof = 1;
2436                return len;
2437        }
2438
2439        if( mega_adapinq(adapter, dma_handle) != 0 ) {
2440
2441                len = sprintf(page, "Adapter inquiry failed.\n");
2442
2443                printk(KERN_WARNING "megaraid: inquiry failed.\n");
2444
2445                mega_free_inquiry(inquiry, dma_handle, pdev);
2446
2447                free_local_pdev(pdev);
2448
2449                *eof = 1;
2450
2451                return len;
2452        }
2453
2454        if( adapter->flag & BOARD_40LD ) {
2455                battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
2456        }
2457        else {
2458                battery_status = ((mraid_ext_inquiry *)inquiry)->
2459                        raid_inq.adapter_info.battery_status;
2460        }
2461
2462        /*
2463         * Decode the battery status
2464         */
2465        sprintf(str, "Battery Status:[%d]", battery_status);
2466
2467        if(battery_status == MEGA_BATT_CHARGE_DONE)
2468                strcat(str, " Charge Done");
2469
2470        if(battery_status & MEGA_BATT_MODULE_MISSING)
2471                strcat(str, " Module Missing");
2472        
2473        if(battery_status & MEGA_BATT_LOW_VOLTAGE)
2474                strcat(str, " Low Voltage");
2475        
2476        if(battery_status & MEGA_BATT_TEMP_HIGH)
2477                strcat(str, " Temperature High");
2478        
2479        if(battery_status & MEGA_BATT_PACK_MISSING)
2480                strcat(str, " Pack Missing");
2481        
2482        if(battery_status & MEGA_BATT_CHARGE_INPROG)
2483                strcat(str, " Charge In-progress");
2484        
2485        if(battery_status & MEGA_BATT_CHARGE_FAIL)
2486                strcat(str, " Charge Fail");
2487        
2488        if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
2489                strcat(str, " Cycles Exceeded");
2490
2491        len = sprintf(page, "%s\n", str);
2492
2493
2494        mega_free_inquiry(inquiry, dma_handle, pdev);
2495
2496        free_local_pdev(pdev);
2497
2498        *eof = 1;
2499
2500        return len;
2501}
2502
2503
2504/**
2505 * proc_pdrv_ch0()
2506 * @page - buffer to write the data in
2507 * @start - where the actual data has been written in page
2508 * @offset - same meaning as the read system call
2509 * @count - same meaning as the read system call
2510 * @eof - set if no more data needs to be returned
2511 * @data - pointer to our soft state
2512 *
2513 * Display information about the physical drives on physical channel 0.
2514 */
2515static int
2516proc_pdrv_ch0(char *page, char **start, off_t offset, int count, int *eof,
2517                void *data)
2518{
2519        adapter_t *adapter = (adapter_t *)data;
2520
2521        *eof = 1;
2522
2523        return (proc_pdrv(adapter, page, 0));
2524}
2525
2526
2527/**
2528 * proc_pdrv_ch1()
2529 * @page - buffer to write the data in
2530 * @start - where the actual data has been written in page
2531 * @offset - same meaning as the read system call
2532 * @count - same meaning as the read system call
2533 * @eof - set if no more data needs to be returned
2534 * @data - pointer to our soft state
2535 *
2536 * Display information about the physical drives on physical channel 1.
2537 */
2538static int
2539proc_pdrv_ch1(char *page, char **start, off_t offset, int count, int *eof,
2540                void *data)
2541{
2542        adapter_t *adapter = (adapter_t *)data;
2543
2544        *eof = 1;
2545
2546        return (proc_pdrv(adapter, page, 1));
2547}
2548
2549
2550/**
2551 * proc_pdrv_ch2()
2552 * @page - buffer to write the data in
2553 * @start - where the actual data has been written in page
2554 * @offset - same meaning as the read system call
2555 * @count - same meaning as the read system call
2556 * @eof - set if no more data needs to be returned
2557 * @data - pointer to our soft state
2558 *
2559 * Display information about the physical drives on physical channel 2.
2560 */
2561static int
2562proc_pdrv_ch2(char *page, char **start, off_t offset, int count, int *eof,
2563                void *data)
2564{
2565        adapter_t *adapter = (adapter_t *)data;
2566
2567        *eof = 1;
2568
2569        return (proc_pdrv(adapter, page, 2));
2570}
2571
2572
2573/**
2574 * proc_pdrv_ch3()
2575 * @page - buffer to write the data in
2576 * @start - where the actual data has been written in page
2577 * @offset - same meaning as the read system call
2578 * @count - same meaning as the read system call
2579 * @eof - set if no more data needs to be returned
2580 * @data - pointer to our soft state
2581 *
2582 * Display information about the physical drives on physical channel 3.
2583 */
2584static int
2585proc_pdrv_ch3(char *page, char **start, off_t offset, int count, int *eof,
2586                void *data)
2587{
2588        adapter_t *adapter = (adapter_t *)data;
2589
2590        *eof = 1;
2591
2592        return (proc_pdrv(adapter, page, 3));
2593}
2594
2595
2596/**
2597 * proc_pdrv()
2598 * @page - buffer to write the data in
2599 * @adapter - pointer to our soft state
2600 *
2601 * Display information about the physical drives.
2602 */
2603static int
2604proc_pdrv(adapter_t *adapter, char *page, int channel)
2605{
2606        dma_addr_t      dma_handle;
2607        char            *scsi_inq;
2608        dma_addr_t      scsi_inq_dma_handle;
2609        caddr_t         inquiry;
2610        struct pci_dev  *pdev;
2611        u8      *pdrv_state;
2612        u8      state;
2613        int     tgt;
2614        int     max_channels;
2615        int     len = 0;
2616        char    str[80];
2617        int     i;
2618
2619        if( make_local_pdev(adapter, &pdev) != 0 ) {
2620                return len;
2621        }
2622
2623        if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
2624                goto free_pdev;
2625        }
2626
2627        if( mega_adapinq(adapter, dma_handle) != 0 ) {
2628                len = sprintf(page, "Adapter inquiry failed.\n");
2629
2630                printk(KERN_WARNING "megaraid: inquiry failed.\n");
2631
2632                goto free_inquiry;
2633        }
2634
2635
2636        scsi_inq = pci_alloc_consistent(pdev, 256, &scsi_inq_dma_handle);
2637
2638        if( scsi_inq == NULL ) {
2639                len = sprintf(page, "memory not available for scsi inq.\n");
2640
2641                goto free_inquiry;
2642        }
2643
2644        if( adapter->flag & BOARD_40LD ) {
2645                pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
2646        }
2647        else {
2648                pdrv_state = ((mraid_ext_inquiry *)inquiry)->
2649                        raid_inq.pdrv_info.pdrv_state;
2650        }
2651
2652        max_channels = adapter->product_info.nchannels;
2653
2654        if( channel >= max_channels ) {
2655                goto free_pci;
2656        }
2657
2658        for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
2659
2660                i = channel*16 + tgt;
2661
2662                state = *(pdrv_state + i);
2663
2664                switch( state & 0x0F ) {
2665
2666                case PDRV_ONLINE:
2667                        sprintf(str,
2668                        "Channel:%2d Id:%2d State: Online",
2669                                channel, tgt);
2670                        break;
2671
2672                case PDRV_FAILED:
2673                        sprintf(str,
2674                        "Channel:%2d Id:%2d State: Failed",
2675                                channel, tgt);
2676                        break;
2677
2678                case PDRV_RBLD:
2679                        sprintf(str,
2680                        "Channel:%2d Id:%2d State: Rebuild",
2681                                channel, tgt);
2682                        break;
2683
2684                case PDRV_HOTSPARE:
2685                        sprintf(str,
2686                        "Channel:%2d Id:%2d State: Hot spare",
2687                                channel, tgt);
2688                        break;
2689
2690                default:
2691                        sprintf(str,
2692                        "Channel:%2d Id:%2d State: Un-configured",
2693                                channel, tgt);
2694                        break;
2695
2696                }
2697
2698                /*
2699                 * This interface displays inquiries for disk drives
2700                 * only. Inquries for logical drives and non-disk
2701                 * devices are available through /proc/scsi/scsi
2702                 */
2703                memset(scsi_inq, 0, 256);
2704                if( mega_internal_dev_inquiry(adapter, channel, tgt,
2705                                scsi_inq_dma_handle) ||
2706                                (scsi_inq[0] & 0x1F) != TYPE_DISK ) {
2707                        continue;
2708                }
2709
2710                /*
2711                 * Check for overflow. We print less than 240
2712                 * characters for inquiry
2713                 */
2714                if( (len + 240) >= PAGE_SIZE ) break;
2715
2716                len += sprintf(page+len, "%s.\n", str);
2717
2718                len += mega_print_inquiry(page+len, scsi_inq);
2719        }
2720
2721free_pci:
2722        pci_free_consistent(pdev, 256, scsi_inq, scsi_inq_dma_handle);
2723free_inquiry:
2724        mega_free_inquiry(inquiry, dma_handle, pdev);
2725free_pdev:
2726        free_local_pdev(pdev);
2727
2728        return len;
2729}
2730
2731
2732/*
2733 * Display scsi inquiry
2734 */
2735static int
2736mega_print_inquiry(char *page, char *scsi_inq)
2737{
2738        int     len = 0;
2739        int     i;
2740
2741        len = sprintf(page, "  Vendor: ");
2742        for( i = 8; i < 16; i++ ) {
2743                len += sprintf(page+len, "%c", scsi_inq[i]);
2744        }
2745
2746        len += sprintf(page+len, "  Model: ");
2747
2748        for( i = 16; i < 32; i++ ) {
2749                len += sprintf(page+len, "%c", scsi_inq[i]);
2750        }
2751
2752        len += sprintf(page+len, "  Rev: ");
2753
2754        for( i = 32; i < 36; i++ ) {
2755                len += sprintf(page+len, "%c", scsi_inq[i]);
2756        }
2757
2758        len += sprintf(page+len, "\n");
2759
2760        i = scsi_inq[0] & 0x1f;
2761
2762        len += sprintf(page+len, "  Type:   %s ", scsi_device_type(i));
2763
2764        len += sprintf(page+len,
2765        "                 ANSI SCSI revision: %02x", scsi_inq[2] & 0x07);
2766
2767        if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
2768                len += sprintf(page+len, " CCS\n");
2769        else
2770                len += sprintf(page+len, "\n");
2771
2772        return len;
2773}
2774
2775
2776/**
2777 * proc_rdrv_10()
2778 * @page - buffer to write the data in
2779 * @start - where the actual data has been written in page
2780 * @offset - same meaning as the read system call
2781 * @count - same meaning as the read system call
2782 * @eof - set if no more data needs to be returned
2783 * @data - pointer to our soft state
2784 *
2785 * Display real time information about the logical drives 0 through 9.
2786 */
2787static int
2788proc_rdrv_10(char *page, char **start, off_t offset, int count, int *eof,
2789                void *data)
2790{
2791        adapter_t *adapter = (adapter_t *)data;
2792
2793        *eof = 1;
2794
2795        return (proc_rdrv(adapter, page, 0, 9));
2796}
2797
2798
2799/**
2800 * proc_rdrv_20()
2801 * @page - buffer to write the data in
2802 * @start - where the actual data has been written in page
2803 * @offset - same meaning as the read system call
2804 * @count - same meaning as the read system call
2805 * @eof - set if no more data needs to be returned
2806 * @data - pointer to our soft state
2807 *
2808 * Display real time information about the logical drives 0 through 9.
2809 */
2810static int
2811proc_rdrv_20(char *page, char **start, off_t offset, int count, int *eof,
2812                void *data)
2813{
2814        adapter_t *adapter = (adapter_t *)data;
2815
2816        *eof = 1;
2817
2818        return (proc_rdrv(adapter, page, 10, 19));
2819}
2820
2821
2822/**
2823 * proc_rdrv_30()
2824 * @page - buffer to write the data in
2825 * @start - where the actual data has been written in page
2826 * @offset - same meaning as the read system call
2827 * @count - same meaning as the read system call
2828 * @eof - set if no more data needs to be returned
2829 * @data - pointer to our soft state
2830 *
2831 * Display real time information about the logical drives 0 through 9.
2832 */
2833static int
2834proc_rdrv_30(char *page, char **start, off_t offset, int count, int *eof,
2835                void *data)
2836{
2837        adapter_t *adapter = (adapter_t *)data;
2838
2839        *eof = 1;
2840
2841        return (proc_rdrv(adapter, page, 20, 29));
2842}
2843
2844
2845/**
2846 * proc_rdrv_40()
2847 * @page - buffer to write the data in
2848 * @start - where the actual data has been written in page
2849 * @offset - same meaning as the read system call
2850 * @count - same meaning as the read system call
2851 * @eof - set if no more data needs to be returned
2852 * @data - pointer to our soft state
2853 *
2854 * Display real time information about the logical drives 0 through 9.
2855 */
2856static int
2857proc_rdrv_40(char *page, char **start, off_t offset, int count, int *eof,
2858                void *data)
2859{
2860        adapter_t *adapter = (adapter_t *)data;
2861
2862        *eof = 1;
2863
2864        return (proc_rdrv(adapter, page, 30, 39));
2865}
2866
2867
2868/**
2869 * proc_rdrv()
2870 * @page - buffer to write the data in
2871 * @adapter - pointer to our soft state
2872 * @start - starting logical drive to display
2873 * @end - ending logical drive to display
2874 *
2875 * We do not print the inquiry information since its already available through
2876 * /proc/scsi/scsi interface
2877 */
2878static int
2879proc_rdrv(adapter_t *adapter, char *page, int start, int end )
2880{
2881        dma_addr_t      dma_handle;
2882        logdrv_param    *lparam;
2883        megacmd_t       mc;
2884        char            *disk_array;
2885        dma_addr_t      disk_array_dma_handle;
2886        caddr_t         inquiry;
2887        struct pci_dev  *pdev;
2888        u8      *rdrv_state;
2889        int     num_ldrv;
2890        u32     array_sz;
2891        int     len = 0;
2892        int     i;
2893
2894        if( make_local_pdev(adapter, &pdev) != 0 ) {
2895                return len;
2896        }
2897
2898        if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
2899                free_local_pdev(pdev);
2900                return len;
2901        }
2902
2903        if( mega_adapinq(adapter, dma_handle) != 0 ) {
2904
2905                len = sprintf(page, "Adapter inquiry failed.\n");
2906
2907                printk(KERN_WARNING "megaraid: inquiry failed.\n");
2908
2909                mega_free_inquiry(inquiry, dma_handle, pdev);
2910
2911                free_local_pdev(pdev);
2912
2913                return len;
2914        }
2915
2916        memset(&mc, 0, sizeof(megacmd_t));
2917
2918        if( adapter->flag & BOARD_40LD ) {
2919                array_sz = sizeof(disk_array_40ld);
2920
2921                rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
2922
2923                num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
2924        }
2925        else {
2926                array_sz = sizeof(disk_array_8ld);
2927
2928                rdrv_state = ((mraid_ext_inquiry *)inquiry)->
2929                        raid_inq.logdrv_info.ldrv_state;
2930
2931                num_ldrv = ((mraid_ext_inquiry *)inquiry)->
2932                        raid_inq.logdrv_info.num_ldrv;
2933        }
2934
2935        disk_array = pci_alloc_consistent(pdev, array_sz,
2936                        &disk_array_dma_handle);
2937
2938        if( disk_array == NULL ) {
2939                len = sprintf(page, "memory not available.\n");
2940
2941                mega_free_inquiry(inquiry, dma_handle, pdev);
2942
2943                free_local_pdev(pdev);
2944
2945                return len;
2946        }
2947
2948        mc.xferaddr = (u32)disk_array_dma_handle;
2949
2950        if( adapter->flag & BOARD_40LD ) {
2951                mc.cmd = FC_NEW_CONFIG;
2952                mc.opcode = OP_DCMD_READ_CONFIG;
2953
2954                if( mega_internal_command(adapter, &mc, NULL) ) {
2955
2956                        len = sprintf(page, "40LD read config failed.\n");
2957
2958                        mega_free_inquiry(inquiry, dma_handle, pdev);
2959
2960                        pci_free_consistent(pdev, array_sz, disk_array,
2961                                        disk_array_dma_handle);
2962
2963                        free_local_pdev(pdev);
2964
2965                        return len;
2966                }
2967
2968        }
2969        else {
2970                mc.cmd = NEW_READ_CONFIG_8LD;
2971
2972                if( mega_internal_command(adapter, &mc, NULL) ) {
2973
2974                        mc.cmd = READ_CONFIG_8LD;
2975
2976                        if( mega_internal_command(adapter, &mc,
2977                                                NULL) ){
2978
2979                                len = sprintf(page,
2980                                        "8LD read config failed.\n");
2981
2982                                mega_free_inquiry(inquiry, dma_handle, pdev);
2983
2984                                pci_free_consistent(pdev, array_sz,
2985                                                disk_array,
2986                                                disk_array_dma_handle);
2987
2988                                free_local_pdev(pdev);
2989
2990                                return len;
2991                        }
2992                }
2993        }
2994
2995        for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
2996
2997                if( adapter->flag & BOARD_40LD ) {
2998                        lparam =
2999                        &((disk_array_40ld *)disk_array)->ldrv[i].lparam;
3000                }
3001                else {
3002                        lparam =
3003                        &((disk_array_8ld *)disk_array)->ldrv[i].lparam;
3004                }
3005
3006                /*
3007                 * Check for overflow. We print less than 240 characters for
3008                 * information about each logical drive.
3009                 */
3010                if( (len + 240) >= PAGE_SIZE ) break;
3011
3012                len += sprintf(page+len, "Logical drive:%2d:, ", i);
3013
3014                switch( rdrv_state[i] & 0x0F ) {
3015                case RDRV_OFFLINE:
3016                        len += sprintf(page+len, "state: offline");
3017                        break;
3018
3019                case RDRV_DEGRADED:
3020                        len += sprintf(page+len, "state: degraded");
3021                        break;
3022
3023                case RDRV_OPTIMAL:
3024                        len += sprintf(page+len, "state: optimal");
3025                        break;
3026
3027                case RDRV_DELETED:
3028                        len += sprintf(page+len, "state: deleted");
3029                        break;
3030
3031                default:
3032                        len += sprintf(page+len, "state: unknown");
3033                        break;
3034                }
3035
3036                /*
3037                 * Check if check consistency or initialization is going on
3038                 * for this logical drive.
3039                 */
3040                if( (rdrv_state[i] & 0xF0) == 0x20 ) {
3041                        len += sprintf(page+len,
3042                                        ", check-consistency in progress");
3043                }
3044                else if( (rdrv_state[i] & 0xF0) == 0x10 ) {
3045                        len += sprintf(page+len,
3046                                        ", initialization in progress");
3047                }
3048                
3049                len += sprintf(page+len, "\n");
3050
3051                len += sprintf(page+len, "Span depth:%3d, ",
3052                                lparam->span_depth);
3053
3054                len += sprintf(page+len, "RAID level:%3d, ",
3055                                lparam->level);
3056
3057                len += sprintf(page+len, "Stripe size:%3d, ",
3058                                lparam->stripe_sz ? lparam->stripe_sz/2: 128);
3059
3060                len += sprintf(page+len, "Row size:%3d\n",
3061                                lparam->row_size);
3062
3063
3064                len += sprintf(page+len, "Read Policy: ");
3065
3066                switch(lparam->read_ahead) {
3067
3068                case NO_READ_AHEAD:
3069                        len += sprintf(page+len, "No read ahead, ");
3070                        break;
3071
3072                case READ_AHEAD:
3073                        len += sprintf(page+len, "Read ahead, ");
3074                        break;
3075
3076                case ADAP_READ_AHEAD:
3077                        len += sprintf(page+len, "Adaptive, ");
3078                        break;
3079
3080                }
3081
3082                len += sprintf(page+len, "Write Policy: ");
3083
3084                switch(lparam->write_mode) {
3085
3086                case WRMODE_WRITE_THRU:
3087                        len += sprintf(page+len, "Write thru, ");
3088                        break;
3089
3090                case WRMODE_WRITE_BACK:
3091                        len += sprintf(page+len, "Write back, ");
3092                        break;
3093                }
3094
3095                len += sprintf(page+len, "Cache Policy: ");
3096
3097                switch(lparam->direct_io) {
3098
3099                case CACHED_IO:
3100                        len += sprintf(page+len, "Cached IO\n\n");
3101                        break;
3102
3103                case DIRECT_IO:
3104                        len += sprintf(page+len, "Direct IO\n\n");
3105                        break;
3106                }
3107        }
3108
3109        mega_free_inquiry(inquiry, dma_handle, pdev);
3110
3111        pci_free_consistent(pdev, array_sz, disk_array,
3112                        disk_array_dma_handle);
3113
3114        free_local_pdev(pdev);
3115
3116        return len;
3117}
3118#else
3119static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
3120{
3121}
3122#endif
3123
3124
3125/**
3126 * megaraid_biosparam()
3127 *
3128 * Return the disk geometry for a particular disk
3129 */
3130static int
3131megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
3132                    sector_t capacity, int geom[])
3133{
3134        adapter_t       *adapter;
3135        unsigned char   *bh;
3136        int     heads;
3137        int     sectors;
3138        int     cylinders;
3139        int     rval;
3140
3141        /* Get pointer to host config structure */
3142        adapter = (adapter_t *)sdev->host->hostdata;
3143
3144        if (IS_RAID_CH(adapter, sdev->channel)) {
3145                        /* Default heads (64) & sectors (32) */
3146                        heads = 64;
3147                        sectors = 32;
3148                        cylinders = (ulong)capacity / (heads * sectors);
3149
3150                        /*
3151                         * Handle extended translation size for logical drives
3152                         * > 1Gb
3153                         */
3154                        if ((ulong)capacity >= 0x200000) {
3155                                heads = 255;
3156                                sectors = 63;
3157                                cylinders = (ulong)capacity / (heads * sectors);
3158                        }
3159
3160                        /* return result */
3161                        geom[0] = heads;
3162                        geom[1] = sectors;
3163                        geom[2] = cylinders;
3164        }
3165        else {
3166                bh = scsi_bios_ptable(bdev);
3167
3168                if( bh ) {
3169                        rval = scsi_partsize(bh, capacity,
3170                                            &geom[2], &geom[0], &geom[1]);
3171                        kfree(bh);
3172                        if( rval != -1 )
3173                                return rval;
3174                }
3175
3176                printk(KERN_INFO
3177                "megaraid: invalid partition on this disk on channel %d\n",
3178                                sdev->channel);
3179
3180                /* Default heads (64) & sectors (32) */
3181                heads = 64;
3182                sectors = 32;
3183                cylinders = (ulong)capacity / (heads * sectors);
3184
3185                /* Handle extended translation size for logical drives > 1Gb */
3186                if ((ulong)capacity >= 0x200000) {
3187                        heads = 255;
3188                        sectors = 63;
3189                        cylinders = (ulong)capacity / (heads * sectors);
3190                }
3191
3192                /* return result */
3193                geom[0] = heads;
3194                geom[1] = sectors;
3195                geom[2] = cylinders;
3196        }
3197
3198        return 0;
3199}
3200
3201/**
3202 * mega_init_scb()
3203 * @adapter - pointer to our soft state
3204 *
3205 * Allocate memory for the various pointers in the scb structures:
3206 * scatter-gather list pointer, passthru and extended passthru structure
3207 * pointers.
3208 */
3209static int
3210mega_init_scb(adapter_t *adapter)
3211{
3212        scb_t   *scb;
3213        int     i;
3214
3215        for( i = 0; i < adapter->max_cmds; i++ ) {
3216
3217                scb = &adapter->scb_list[i];
3218
3219                scb->sgl64 = NULL;
3220                scb->sgl = NULL;
3221                scb->pthru = NULL;
3222                scb->epthru = NULL;
3223        }
3224
3225        for( i = 0; i < adapter->max_cmds; i++ ) {
3226
3227                scb = &adapter->scb_list[i];
3228
3229                scb->idx = i;
3230
3231                scb->sgl64 = pci_alloc_consistent(adapter->dev,
3232                                sizeof(mega_sgl64) * adapter->sglen,
3233                                &scb->sgl_dma_addr);
3234
3235                scb->sgl = (mega_sglist *)scb->sgl64;
3236
3237                if( !scb->sgl ) {
3238                        printk(KERN_WARNING "RAID: Can't allocate sglist.\n");
3239                        mega_free_sgl(adapter);
3240                        return -1;
3241                }
3242
3243                scb->pthru = pci_alloc_consistent(adapter->dev,
3244                                sizeof(mega_passthru),
3245                                &scb->pthru_dma_addr);
3246
3247                if( !scb->pthru ) {
3248                        printk(KERN_WARNING "RAID: Can't allocate passthru.\n");
3249                        mega_free_sgl(adapter);
3250                        return -1;
3251                }
3252
3253                scb->epthru = pci_alloc_consistent(adapter->dev,
3254                                sizeof(mega_ext_passthru),
3255                                &scb->epthru_dma_addr);
3256
3257                if( !scb->epthru ) {
3258                        printk(KERN_WARNING
3259                                "Can't allocate extended passthru.\n");
3260                        mega_free_sgl(adapter);
3261                        return -1;
3262                }
3263
3264
3265                scb->dma_type = MEGA_DMA_TYPE_NONE;
3266
3267                /*
3268                 * Link to free list
3269                 * lock not required since we are loading the driver, so no
3270                 * commands possible right now.
3271                 */
3272                scb->state = SCB_FREE;
3273                scb->cmd = NULL;
3274                list_add(&scb->list, &adapter->free_list);
3275        }
3276
3277        return 0;
3278}
3279
3280
3281/**
3282 * megadev_open()
3283 * @inode - unused
3284 * @filep - unused
3285 *
3286 * Routines for the character/ioctl interface to the driver. Find out if this
3287 * is a valid open. 
3288 */
3289static int
3290megadev_open (struct inode *inode, struct file *filep)
3291{
3292        /*
3293         * Only allow superuser to access private ioctl interface
3294         */
3295        if( !capable(CAP_SYS_ADMIN) ) return -EACCES;
3296
3297        return 0;
3298}
3299
3300
3301/**
3302 * megadev_ioctl()
3303 * @inode - Our device inode
3304 * @filep - unused
3305 * @cmd - ioctl command
3306 * @arg - user buffer
3307 *
3308 * ioctl entry point for our private ioctl interface. We move the data in from
3309 * the user space, prepare the command (if necessary, convert the old MIMD
3310 * ioctl to new ioctl command), and issue a synchronous command to the
3311 * controller.
3312 */
3313static int
3314megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3315{
3316        adapter_t       *adapter;
3317        nitioctl_t      uioc;
3318        int             adapno;
3319        int             rval;
3320        mega_passthru   __user *upthru; /* user address for passthru */
3321        mega_passthru   *pthru;         /* copy user passthru here */
3322        dma_addr_t      pthru_dma_hndl;
3323        void            *data = NULL;   /* data to be transferred */
3324        dma_addr_t      data_dma_hndl;  /* dma handle for data xfer area */
3325        megacmd_t       mc;
3326        megastat_t      __user *ustats;
3327        int             num_ldrv;
3328        u32             uxferaddr = 0;
3329        struct pci_dev  *pdev;
3330
3331        ustats = NULL; /* avoid compilation warnings */
3332        num_ldrv = 0;
3333
3334        /*
3335         * Make sure only USCSICMD are issued through this interface.
3336         * MIMD application would still fire different command.
3337         */
3338        if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
3339                return -EINVAL;
3340        }
3341
3342        /*
3343         * Check and convert a possible MIMD command to NIT command.
3344         * mega_m_to_n() copies the data from the user space, so we do not
3345         * have to do it here.
3346         * NOTE: We will need some user address to copyout the data, therefore
3347         * the inteface layer will also provide us with the required user
3348         * addresses.
3349         */
3350        memset(&uioc, 0, sizeof(nitioctl_t));
3351        if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
3352                return rval;
3353
3354
3355        switch( uioc.opcode ) {
3356
3357        case GET_DRIVER_VER:
3358                if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
3359                        return (-EFAULT);
3360
3361                break;
3362
3363        case GET_N_ADAP:
3364                if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
3365                        return (-EFAULT);
3366
3367                /*
3368                 * Shucks. MIMD interface returns a positive value for number
3369                 * of adapters. TODO: Change it to return 0 when there is no
3370                 * applicatio using mimd interface.
3371                 */
3372                return hba_count;
3373
3374        case GET_ADAP_INFO:
3375
3376                /*
3377                 * Which adapter
3378                 */
3379                if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3380                        return (-ENODEV);
3381
3382                if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
3383                                sizeof(struct mcontroller)) )
3384                        return (-EFAULT);
3385                break;
3386
3387#if MEGA_HAVE_STATS
3388
3389        case GET_STATS:
3390                /*
3391                 * Which adapter
3392                 */
3393                if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3394                        return (-ENODEV);
3395
3396                adapter = hba_soft_state[adapno];
3397
3398                ustats = uioc.uioc_uaddr;
3399
3400                if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
3401                        return (-EFAULT);
3402
3403                /*
3404                 * Check for the validity of the logical drive number
3405                 */
3406                if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
3407
3408                if( copy_to_user(ustats->nreads, adapter->nreads,
3409                                        num_ldrv*sizeof(u32)) )
3410                        return -EFAULT;
3411
3412                if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
3413                                        num_ldrv*sizeof(u32)) )
3414                        return -EFAULT;
3415
3416                if( copy_to_user(ustats->nwrites, adapter->nwrites,
3417                                        num_ldrv*sizeof(u32)) )
3418                        return -EFAULT;
3419
3420                if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
3421                                        num_ldrv*sizeof(u32)) )
3422                        return -EFAULT;
3423
3424                if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
3425                                        num_ldrv*sizeof(u32)) )
3426                        return -EFAULT;
3427
3428                if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
3429                                        num_ldrv*sizeof(u32)) )
3430                        return -EFAULT;
3431
3432                return 0;
3433
3434#endif
3435        case MBOX_CMD:
3436
3437                /*
3438                 * Which adapter
3439                 */
3440                if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3441                        return (-ENODEV);
3442
3443                adapter = hba_soft_state[adapno];
3444
3445                /*
3446                 * Deletion of logical drive is a special case. The adapter
3447                 * should be quiescent before this command is issued.
3448                 */
3449                if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
3450                                uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
3451
3452                        /*
3453                         * Do we support this feature
3454                         */
3455                        if( !adapter->support_random_del ) {
3456                                printk(KERN_WARNING "megaraid: logdrv ");
3457                                printk("delete on non-supporting F/W.\n");
3458
3459                                return (-EINVAL);
3460                        }
3461
3462                        rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
3463
3464                        if( rval == 0 ) {
3465                                memset(&mc, 0, sizeof(megacmd_t));
3466
3467                                mc.status = rval;
3468
3469                                rval = mega_n_to_m((void __user *)arg, &mc);
3470                        }
3471
3472                        return rval;
3473                }
3474                /*
3475                 * This interface only support the regular passthru commands.
3476                 * Reject extended passthru and 64-bit passthru
3477                 */
3478                if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
3479                        uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
3480
3481                        printk(KERN_WARNING "megaraid: rejected passthru.\n");
3482
3483                        return (-EINVAL);
3484                }
3485
3486                /*
3487                 * For all internal commands, the buffer must be allocated in
3488                 * <4GB address range
3489                 */
3490                if( make_local_pdev(adapter, &pdev) != 0 )
3491                        return -EIO;
3492
3493                /* Is it a passthru command or a DCMD */
3494                if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
3495                        /* Passthru commands */
3496
3497                        pthru = pci_alloc_consistent(pdev,
3498                                        sizeof(mega_passthru),
3499                                        &pthru_dma_hndl);
3500
3501                        if( pthru == NULL ) {
3502                                free_local_pdev(pdev);
3503                                return (-ENOMEM);
3504                        }
3505
3506                        /*
3507                         * The user passthru structure
3508                         */
3509                        upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr;
3510
3511                        /*
3512                         * Copy in the user passthru here.
3513                         */
3514                        if( copy_from_user(pthru, upthru,
3515                                                sizeof(mega_passthru)) ) {
3516
3517                                pci_free_consistent(pdev,
3518                                                sizeof(mega_passthru), pthru,
3519                                                pthru_dma_hndl);
3520
3521                                free_local_pdev(pdev);
3522
3523                                return (-EFAULT);
3524                        }
3525
3526                        /*
3527                         * Is there a data transfer
3528                         */
3529                        if( pthru->dataxferlen ) {
3530                                data = pci_alloc_consistent(pdev,
3531                                                pthru->dataxferlen,
3532                                                &data_dma_hndl);
3533
3534                                if( data == NULL ) {
3535                                        pci_free_consistent(pdev,
3536                                                        sizeof(mega_passthru),
3537                                                        pthru,
3538                                                        pthru_dma_hndl);
3539
3540                                        free_local_pdev(pdev);
3541
3542                                        return (-ENOMEM);
3543                                }
3544
3545                                /*
3546                                 * Save the user address and point the kernel
3547                                 * address at just allocated memory
3548                                 */
3549                                uxferaddr = pthru->dataxferaddr;
3550                                pthru->dataxferaddr = data_dma_hndl;
3551                        }
3552
3553
3554                        /*
3555                         * Is data coming down-stream
3556                         */
3557                        if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) {
3558                                /*
3559                                 * Get the user data
3560                                 */
3561                                if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3562                                                        pthru->dataxferlen) ) {
3563                                        rval = (-EFAULT);
3564                                        goto freemem_and_return;
3565                                }
3566                        }
3567
3568                        memset(&mc, 0, sizeof(megacmd_t));
3569
3570                        mc.cmd = MEGA_MBOXCMD_PASSTHRU;
3571                        mc.xferaddr = (u32)pthru_dma_hndl;
3572
3573                        /*
3574                         * Issue the command
3575                         */
3576                        mega_internal_command(adapter, &mc, pthru);
3577
3578                        rval = mega_n_to_m((void __user *)arg, &mc);
3579
3580                        if( rval ) goto freemem_and_return;
3581
3582
3583                        /*
3584                         * Is data going up-stream
3585                         */
3586                        if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
3587                                if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3588                                                        pthru->dataxferlen) ) {
3589                                        rval = (-EFAULT);
3590                                }
3591                        }
3592
3593                        /*
3594                         * Send the request sense data also, irrespective of
3595                         * whether the user has asked for it or not.
3596                         */
3597                        if (copy_to_user(upthru->reqsensearea,
3598                                        pthru->reqsensearea, 14))
3599                                rval = -EFAULT;
3600
3601freemem_and_return:
3602                        if( pthru->dataxferlen ) {
3603                                pci_free_consistent(pdev,
3604                                                pthru->dataxferlen, data,
3605                                                data_dma_hndl);
3606                        }
3607
3608                        pci_free_consistent(pdev, sizeof(mega_passthru),
3609                                        pthru, pthru_dma_hndl);
3610
3611                        free_local_pdev(pdev);
3612
3613                        return rval;
3614                }
3615                else {
3616                        /* DCMD commands */
3617
3618                        /*
3619                         * Is there a data transfer
3620                         */
3621                        if( uioc.xferlen ) {
3622                                data = pci_alloc_consistent(pdev,
3623                                                uioc.xferlen, &data_dma_hndl);
3624
3625                                if( data == NULL ) {
3626                                        free_local_pdev(pdev);
3627                                        return (-ENOMEM);
3628                                }
3629
3630                                uxferaddr = MBOX(uioc)->xferaddr;
3631                        }
3632
3633                        /*
3634                         * Is data coming down-stream
3635                         */
3636                        if( uioc.xferlen && (uioc.flags & UIOC_WR) ) {
3637                                /*
3638                                 * Get the user data
3639                                 */
3640                                if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3641                                                        uioc.xferlen) ) {
3642
3643                                        pci_free_consistent(pdev,
3644                                                        uioc.xferlen,
3645                                                        data, data_dma_hndl);
3646
3647                                        free_local_pdev(pdev);
3648
3649                                        return (-EFAULT);
3650                                }
3651                        }
3652
3653                        memcpy(&mc, MBOX(uioc), sizeof(megacmd_t));
3654
3655                        mc.xferaddr = (u32)data_dma_hndl;
3656
3657                        /*
3658                         * Issue the command
3659                         */
3660                        mega_internal_command(adapter, &mc, NULL);
3661
3662                        rval = mega_n_to_m((void __user *)arg, &mc);
3663
3664                        if( rval ) {
3665                                if( uioc.xferlen ) {
3666                                        pci_free_consistent(pdev,
3667                                                        uioc.xferlen, data,
3668                                                        data_dma_hndl);
3669                                }
3670
3671                                free_local_pdev(pdev);
3672
3673                                return rval;
3674                        }
3675
3676                        /*
3677                         * Is data going up-stream
3678                         */
3679                        if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
3680                                if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3681                                                        uioc.xferlen) ) {
3682
3683                                        rval = (-EFAULT);
3684                                }
3685                        }
3686
3687                        if( uioc.xferlen ) {
3688                                pci_free_consistent(pdev,
3689                                                uioc.xferlen, data,
3690                                                data_dma_hndl);
3691                        }
3692
3693                        free_local_pdev(pdev);
3694
3695                        return rval;
3696                }
3697
3698        default:
3699                return (-EINVAL);
3700        }
3701
3702        return 0;
3703}
3704
3705static long
3706megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3707{
3708        int ret;
3709
3710        mutex_lock(&megadev_mutex);
3711        ret = megadev_ioctl(filep, cmd, arg);
3712        mutex_unlock(&megadev_mutex);
3713
3714        return ret;
3715}
3716
3717/**
3718 * mega_m_to_n()
3719 * @arg - user address
3720 * @uioc - new ioctl structure
3721 *
3722 * A thin layer to convert older mimd interface ioctl structure to NIT ioctl
3723 * structure
3724 *
3725 * Converts the older mimd ioctl structure to newer NIT structure
3726 */
3727static int
3728mega_m_to_n(void __user *arg, nitioctl_t *uioc)
3729{
3730        struct uioctl_t uioc_mimd;
3731        char    signature[8] = {0};
3732        u8      opcode;
3733        u8      subopcode;
3734
3735
3736        /*
3737         * check is the application conforms to NIT. We do not have to do much
3738         * in that case.
3739         * We exploit the fact that the signature is stored in the very
3740         * beginning of the structure.
3741         */
3742
3743        if( copy_from_user(signature, arg, 7) )
3744                return (-EFAULT);
3745
3746        if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3747
3748                /*
3749                 * NOTE NOTE: The nit ioctl is still under flux because of
3750                 * change of mailbox definition, in HPE. No applications yet
3751                 * use this interface and let's not have applications use this
3752                 * interface till the new specifitions are in place.
3753                 */
3754                return -EINVAL;
3755#if 0
3756                if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
3757                        return (-EFAULT);
3758                return 0;
3759#endif
3760        }
3761
3762        /*
3763         * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
3764         *
3765         * Get the user ioctl structure
3766         */
3767        if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
3768                return (-EFAULT);
3769
3770
3771        /*
3772         * Get the opcode and subopcode for the commands
3773         */
3774        opcode = uioc_mimd.ui.fcs.opcode;
3775        subopcode = uioc_mimd.ui.fcs.subopcode;
3776
3777        switch (opcode) {
3778        case 0x82:
3779
3780                switch (subopcode) {
3781
3782                case MEGAIOC_QDRVRVER:  /* Query driver version */
3783                        uioc->opcode = GET_DRIVER_VER;
3784                        uioc->uioc_uaddr = uioc_mimd.data;
3785                        break;
3786
3787                case MEGAIOC_QNADAP:    /* Get # of adapters */
3788                        uioc->opcode = GET_N_ADAP;
3789                        uioc->uioc_uaddr = uioc_mimd.data;
3790                        break;
3791
3792                case MEGAIOC_QADAPINFO: /* Get adapter information */
3793                        uioc->opcode = GET_ADAP_INFO;
3794                        uioc->adapno = uioc_mimd.ui.fcs.adapno;
3795                        uioc->uioc_uaddr = uioc_mimd.data;
3796                        break;
3797
3798                default:
3799                        return(-EINVAL);
3800                }
3801
3802                break;
3803
3804
3805        case 0x81:
3806
3807                uioc->opcode = MBOX_CMD;
3808                uioc->adapno = uioc_mimd.ui.fcs.adapno;
3809
3810                memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3811
3812                uioc->xferlen = uioc_mimd.ui.fcs.length;
3813
3814                if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3815                if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3816
3817                break;
3818
3819        case 0x80:
3820
3821                uioc->opcode = MBOX_CMD;
3822                uioc->adapno = uioc_mimd.ui.fcs.adapno;
3823
3824                memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3825
3826                /*
3827                 * Choose the xferlen bigger of input and output data
3828                 */
3829                uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
3830                        uioc_mimd.outlen : uioc_mimd.inlen;
3831
3832                if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3833                if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3834
3835                break;
3836
3837        default:
3838                return (-EINVAL);
3839
3840        }
3841
3842        return 0;
3843}
3844
3845/*
3846 * mega_n_to_m()
3847 * @arg - user address
3848 * @mc - mailbox command
3849 *
3850 * Updates the status information to the application, depending on application
3851 * conforms to older mimd ioctl interface or newer NIT ioctl interface
3852 */
3853static int
3854mega_n_to_m(void __user *arg, megacmd_t *mc)
3855{
3856        nitioctl_t      __user *uiocp;
3857        megacmd_t       __user *umc;
3858        mega_passthru   __user *upthru;
3859        struct uioctl_t __user *uioc_mimd;
3860        char    signature[8] = {0};
3861
3862        /*
3863         * check is the application conforms to NIT.
3864         */
3865        if( copy_from_user(signature, arg, 7) )
3866                return -EFAULT;
3867
3868        if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3869
3870                uiocp = arg;
3871
3872                if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
3873                        return (-EFAULT);
3874
3875                if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3876
3877                        umc = MBOX_P(uiocp);
3878
3879                        if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3880                                return -EFAULT;
3881
3882                        if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
3883                                return (-EFAULT);
3884                }
3885        }
3886        else {
3887                uioc_mimd = arg;
3888
3889                if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
3890                        return (-EFAULT);
3891
3892                if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3893
3894                        umc = (megacmd_t __user *)uioc_mimd->mbox;
3895
3896                        if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3897                                return (-EFAULT);
3898
3899                        if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
3900                                return (-EFAULT);
3901                }
3902        }
3903
3904        return 0;
3905}
3906
3907
3908/*
3909 * MEGARAID 'FW' commands.
3910 */
3911
3912/**
3913 * mega_is_bios_enabled()
3914 * @adapter - pointer to our soft state
3915 *
3916 * issue command to find out if the BIOS is enabled for this controller
3917 */
3918static int
3919mega_is_bios_enabled(adapter_t *adapter)
3920{
3921        unsigned char   raw_mbox[sizeof(struct mbox_out)];
3922        mbox_t  *mbox;
3923        int     ret;
3924
3925        mbox = (mbox_t *)raw_mbox;
3926
3927        memset(&mbox->m_out, 0, sizeof(raw_mbox));
3928
3929        memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3930
3931        mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3932
3933        raw_mbox[0] = IS_BIOS_ENABLED;
3934        raw_mbox[2] = GET_BIOS;
3935
3936
3937        ret = issue_scb_block(adapter, raw_mbox);
3938
3939        return *(char *)adapter->mega_buffer;
3940}
3941
3942
3943/**
3944 * mega_enum_raid_scsi()
3945 * @adapter - pointer to our soft state
3946 *
3947 * Find out what channels are RAID/SCSI. This information is used to
3948 * differentiate the virtual channels and physical channels and to support
3949 * ROMB feature and non-disk devices.
3950 */
3951static void
3952mega_enum_raid_scsi(adapter_t *adapter)
3953{
3954        unsigned char raw_mbox[sizeof(struct mbox_out)];
3955        mbox_t *mbox;
3956        int i;
3957
3958        mbox = (mbox_t *)raw_mbox;
3959
3960        memset(&mbox->m_out, 0, sizeof(raw_mbox));
3961
3962        /*
3963         * issue command to find out what channels are raid/scsi
3964         */
3965        raw_mbox[0] = CHNL_CLASS;
3966        raw_mbox[2] = GET_CHNL_CLASS;
3967
3968        memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3969
3970        mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3971
3972        /*
3973         * Non-ROMB firmware fail this command, so all channels
3974         * must be shown RAID
3975         */
3976        adapter->mega_ch_class = 0xFF;
3977
3978        if(!issue_scb_block(adapter, raw_mbox)) {
3979                adapter->mega_ch_class = *((char *)adapter->mega_buffer);
3980
3981        }
3982
3983        for( i = 0; i < adapter->product_info.nchannels; i++ ) { 
3984                if( (adapter->mega_ch_class >> i) & 0x01 ) {
3985                        printk(KERN_INFO "megaraid: channel[%d] is raid.\n",
3986                                        i);
3987                }
3988                else {
3989                        printk(KERN_INFO "megaraid: channel[%d] is scsi.\n",
3990                                        i);
3991                }
3992        }
3993
3994        return;
3995}
3996
3997
3998/**
3999 * mega_get_boot_drv()
4000 * @adapter - pointer to our soft state
4001 *
4002 * Find out which device is the boot device. Note, any logical drive or any
4003 * phyical device (e.g., a CDROM) can be designated as a boot device.
4004 */
4005static void
4006mega_get_boot_drv(adapter_t *adapter)
4007{
4008        struct private_bios_data        *prv_bios_data;
4009        unsigned char   raw_mbox[sizeof(struct mbox_out)];
4010        mbox_t  *mbox;
4011        u16     cksum = 0;
4012        u8      *cksum_p;
4013        u8      boot_pdrv;
4014        int     i;
4015
4016        mbox = (mbox_t *)raw_mbox;
4017
4018        memset(&mbox->m_out, 0, sizeof(raw_mbox));
4019
4020        raw_mbox[0] = BIOS_PVT_DATA;
4021        raw_mbox[2] = GET_BIOS_PVT_DATA;
4022
4023        memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
4024
4025        mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
4026
4027        adapter->boot_ldrv_enabled = 0;
4028        adapter->boot_ldrv = 0;
4029
4030        adapter->boot_pdrv_enabled = 0;
4031        adapter->boot_pdrv_ch = 0;
4032        adapter->boot_pdrv_tgt = 0;
4033
4034        if(issue_scb_block(adapter, raw_mbox) == 0) {
4035                prv_bios_data =
4036                        (struct private_bios_data *)adapter->mega_buffer;
4037
4038                cksum = 0;
4039                cksum_p = (char *)prv_bios_data;
4040                for (i = 0; i < 14; i++ ) {
4041                        cksum += (u16)(*cksum_p++);
4042                }
4043
4044                if (prv_bios_data->cksum == (u16)(0-cksum) ) {
4045
4046                        /*
4047                         * If MSB is set, a physical drive is set as boot
4048                         * device
4049                         */
4050                        if( prv_bios_data->boot_drv & 0x80 ) {
4051                                adapter->boot_pdrv_enabled = 1;
4052                                boot_pdrv = prv_bios_data->boot_drv & 0x7F;
4053                                adapter->boot_pdrv_ch = boot_pdrv / 16;
4054                                adapter->boot_pdrv_tgt = boot_pdrv % 16;
4055                        }
4056                        else {
4057                                adapter->boot_ldrv_enabled = 1;
4058                                adapter->boot_ldrv = prv_bios_data->boot_drv;
4059                        }
4060                }
4061        }
4062
4063}
4064
4065/**
4066 * mega_support_random_del()
4067 * @adapter - pointer to our soft state
4068 *
4069 * Find out if this controller supports random deletion and addition of
4070 * logical drives
4071 */
4072static int
4073mega_support_random_del(adapter_t *adapter)
4074{
4075        unsigned char raw_mbox[sizeof(struct mbox_out)];
4076        mbox_t *mbox;
4077        int rval;
4078
4079        mbox = (mbox_t *)raw_mbox;
4080
4081        memset(&mbox->m_out, 0, sizeof(raw_mbox));
4082
4083        /*
4084         * issue command
4085         */
4086        raw_mbox[0] = FC_DEL_LOGDRV;
4087        raw_mbox[2] = OP_SUP_DEL_LOGDRV;
4088
4089        rval = issue_scb_block(adapter, raw_mbox);
4090
4091        return !rval;
4092}
4093
4094
4095/**
4096 * mega_support_ext_cdb()
4097 * @adapter - pointer to our soft state
4098 *
4099 * Find out if this firmware support cdblen > 10
4100 */
4101static int
4102mega_support_ext_cdb(adapter_t *adapter)
4103{
4104        unsigned char raw_mbox[sizeof(struct mbox_out)];
4105        mbox_t *mbox;
4106        int rval;
4107
4108        mbox = (mbox_t *)raw_mbox;
4109
4110        memset(&mbox->m_out, 0, sizeof(raw_mbox));
4111        /*
4112         * issue command to find out if controller supports extended CDBs.
4113         */
4114        raw_mbox[0] = 0xA4;
4115        raw_mbox[2] = 0x16;
4116
4117        rval = issue_scb_block(adapter, raw_mbox);
4118
4119        return !rval;
4120}
4121
4122
4123/**
4124 * mega_del_logdrv()
4125 * @adapter - pointer to our soft state
4126 * @logdrv - logical drive to be deleted
4127 *
4128 * Delete the specified logical drive. It is the responsibility of the user
4129 * app to let the OS know about this operation.
4130 */
4131static int
4132mega_del_logdrv(adapter_t *adapter, int logdrv)
4133{
4134        unsigned long flags;
4135        scb_t *scb;
4136        int rval;
4137
4138        /*
4139         * Stop sending commands to the controller, queue them internally.
4140         * When deletion is complete, ISR will flush the queue.
4141         */
4142        atomic_set(&adapter->quiescent, 1);
4143
4144        /*
4145         * Wait till all the issued commands are complete and there are no
4146         * commands in the pending queue
4147         */
4148        while (atomic_read(&adapter->pend_cmds) > 0 ||
4149               !list_empty(&adapter->pending_list))
4150                msleep(1000);   /* sleep for 1s */
4151
4152        rval = mega_do_del_logdrv(adapter, logdrv);
4153
4154        spin_lock_irqsave(&adapter->lock, flags);
4155
4156        /*
4157         * If delete operation was successful, add 0x80 to the logical drive
4158         * ids for commands in the pending queue.
4159         */
4160        if (adapter->read_ldidmap) {
4161                struct list_head *pos;
4162                list_for_each(pos, &adapter->pending_list) {
4163                        scb = list_entry(pos, scb_t, list);
4164                        if (scb->pthru->logdrv < 0x80 )
4165                                scb->pthru->logdrv += 0x80;
4166                }
4167        }
4168
4169        atomic_set(&adapter->quiescent, 0);
4170
4171        mega_runpendq(adapter);
4172
4173        spin_unlock_irqrestore(&adapter->lock, flags);
4174
4175        return rval;
4176}
4177
4178
4179static int
4180mega_do_del_logdrv(adapter_t *adapter, int logdrv)
4181{
4182        megacmd_t       mc;
4183        int     rval;
4184
4185        memset( &mc, 0, sizeof(megacmd_t));
4186
4187        mc.cmd = FC_DEL_LOGDRV;
4188        mc.opcode = OP_DEL_LOGDRV;
4189        mc.subopcode = logdrv;
4190
4191        rval = mega_internal_command(adapter, &mc, NULL);
4192
4193        /* log this event */
4194        if(rval) {
4195                printk(KERN_WARNING "megaraid: Delete LD-%d failed.", logdrv);
4196                return rval;
4197        }
4198
4199        /*
4200         * After deleting first logical drive, the logical drives must be
4201         * addressed by adding 0x80 to the logical drive id.
4202         */
4203        adapter->read_ldidmap = 1;
4204
4205        return rval;
4206}
4207
4208
4209/**
4210 * mega_get_max_sgl()
4211 * @adapter - pointer to our soft state
4212 *
4213 * Find out the maximum number of scatter-gather elements supported by this
4214 * version of the firmware
4215 */
4216static void
4217mega_get_max_sgl(adapter_t *adapter)
4218{
4219        unsigned char   raw_mbox[sizeof(struct mbox_out)];
4220        mbox_t  *mbox;
4221
4222        mbox = (mbox_t *)raw_mbox;
4223
4224        memset(mbox, 0, sizeof(raw_mbox));
4225
4226        memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
4227
4228        mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
4229
4230        raw_mbox[0] = MAIN_MISC_OPCODE;
4231        raw_mbox[2] = GET_MAX_SG_SUPPORT;
4232
4233
4234        if( issue_scb_block(adapter, raw_mbox) ) {
4235                /*
4236                 * f/w does not support this command. Choose the default value
4237                 */
4238                adapter->sglen = MIN_SGLIST;
4239        }
4240        else {
4241                adapter->sglen = *((char *)adapter->mega_buffer);
4242                
4243                /*
4244                 * Make sure this is not more than the resources we are
4245                 * planning to allocate
4246                 */
4247                if ( adapter->sglen > MAX_SGLIST )
4248                        adapter->sglen = MAX_SGLIST;
4249        }
4250
4251        return;
4252}
4253
4254
4255/**
4256 * mega_support_cluster()
4257 * @adapter - pointer to our soft state
4258 *
4259 * Find out if this firmware support cluster calls.
4260 */
4261static int
4262mega_support_cluster(adapter_t *adapter)
4263{
4264        unsigned char   raw_mbox[sizeof(struct mbox_out)];
4265        mbox_t  *mbox;
4266
4267        mbox = (mbox_t *)raw_mbox;
4268
4269        memset(mbox, 0, sizeof(raw_mbox));
4270
4271        memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
4272
4273        mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
4274
4275        /*
4276         * Try to get the initiator id. This command will succeed iff the
4277         * clustering is available on this HBA.
4278         */
4279        raw_mbox[0] = MEGA_GET_TARGET_ID;
4280
4281        if( issue_scb_block(adapter, raw_mbox) == 0 ) {
4282
4283                /*
4284                 * Cluster support available. Get the initiator target id.
4285                 * Tell our id to mid-layer too.
4286                 */
4287                adapter->this_id = *(u32 *)adapter->mega_buffer;
4288                adapter->host->this_id = adapter->this_id;
4289
4290                return 1;
4291        }
4292
4293        return 0;
4294}
4295
4296#ifdef CONFIG_PROC_FS
4297/**
4298 * mega_adapinq()
4299 * @adapter - pointer to our soft state
4300 * @dma_handle - DMA address of the buffer
4301 *
4302 * Issue internal commands while interrupts are available.
4303 * We only issue direct mailbox commands from within the driver. ioctl()
4304 * interface using these routines can issue passthru commands.
4305 */
4306static int
4307mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle)
4308{
4309        megacmd_t       mc;
4310
4311        memset(&mc, 0, sizeof(megacmd_t));
4312
4313        if( adapter->flag & BOARD_40LD ) {
4314                mc.cmd = FC_NEW_CONFIG;
4315                mc.opcode = NC_SUBOP_ENQUIRY3;
4316                mc.subopcode = ENQ3_GET_SOLICITED_FULL;
4317        }
4318        else {
4319                mc.cmd = MEGA_MBOXCMD_ADPEXTINQ;
4320        }
4321
4322        mc.xferaddr = (u32)dma_handle;
4323
4324        if ( mega_internal_command(adapter, &mc, NULL) != 0 ) {
4325                return -1;
4326        }
4327
4328        return 0;
4329}
4330
4331
4332/** mega_internal_dev_inquiry()
4333 * @adapter - pointer to our soft state
4334 * @ch - channel for this device
4335 * @tgt - ID of this device
4336 * @buf_dma_handle - DMA address of the buffer
4337 *
4338 * Issue the scsi inquiry for the specified device.
4339 */
4340static int
4341mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt,
4342                dma_addr_t buf_dma_handle)
4343{
4344        mega_passthru   *pthru;
4345        dma_addr_t      pthru_dma_handle;
4346        megacmd_t       mc;
4347        int             rval;
4348        struct pci_dev  *pdev;
4349
4350
4351        /*
4352         * For all internal commands, the buffer must be allocated in <4GB
4353         * address range
4354         */
4355        if( make_local_pdev(adapter, &pdev) != 0 ) return -1;
4356
4357        pthru = pci_alloc_consistent(pdev, sizeof(mega_passthru),
4358                        &pthru_dma_handle);
4359
4360        if( pthru == NULL ) {
4361                free_local_pdev(pdev);
4362                return -1;
4363        }
4364
4365        pthru->timeout = 2;
4366        pthru->ars = 1;
4367        pthru->reqsenselen = 14;
4368        pthru->islogical = 0;
4369
4370        pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch;
4371
4372        pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt;
4373
4374        pthru->cdblen = 6;
4375
4376        pthru->cdb[0] = INQUIRY;
4377        pthru->cdb[1] = 0;
4378        pthru->cdb[2] = 0;
4379        pthru->cdb[3] = 0;
4380        pthru->cdb[4] = 255;
4381        pthru->cdb[5] = 0;
4382
4383
4384        pthru->dataxferaddr = (u32)buf_dma_handle;
4385        pthru->dataxferlen = 256;
4386
4387        memset(&mc, 0, sizeof(megacmd_t));
4388
4389        mc.cmd = MEGA_MBOXCMD_PASSTHRU;
4390        mc.xferaddr = (u32)pthru_dma_handle;
4391
4392        rval = mega_internal_command(adapter, &mc, pthru);
4393
4394        pci_free_consistent(pdev, sizeof(mega_passthru), pthru,
4395                        pthru_dma_handle);
4396
4397        free_local_pdev(pdev);
4398
4399        return rval;
4400}
4401#endif
4402
4403/**
4404 * mega_internal_command()
4405 * @adapter - pointer to our soft state
4406 * @mc - the mailbox command
4407 * @pthru - Passthru structure for DCDB commands
4408 *
4409 * Issue the internal commands in interrupt mode.
4410 * The last argument is the address of the passthru structure if the command
4411 * to be fired is a passthru command
4412 *
4413 * lockscope specifies whether the caller has already acquired the lock. Of
4414 * course, the caller must know which lock we are talking about.
4415 *
4416 * Note: parameter 'pthru' is null for non-passthru commands.
4417 */
4418static int
4419mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
4420{
4421        Scsi_Cmnd       *scmd;
4422        struct  scsi_device *sdev;
4423        scb_t   *scb;
4424        int     rval;
4425
4426        scmd = scsi_allocate_command(GFP_KERNEL);
4427        if (!scmd)
4428                return -ENOMEM;
4429
4430        /*
4431         * The internal commands share one command id and hence are
4432         * serialized. This is so because we want to reserve maximum number of
4433         * available command ids for the I/O commands.
4434         */
4435        mutex_lock(&adapter->int_mtx);
4436
4437        scb = &adapter->int_scb;
4438        memset(scb, 0, sizeof(scb_t));
4439
4440        sdev = kzalloc(sizeof(struct scsi_device), GFP_KERNEL);
4441        scmd->device = sdev;
4442
4443        memset(adapter->int_cdb, 0, sizeof(adapter->int_cdb));
4444        scmd->cmnd = adapter->int_cdb;
4445        scmd->device->host = adapter->host;
4446        scmd->host_scribble = (void *)scb;
4447        scmd->cmnd[0] = MEGA_INTERNAL_CMD;
4448
4449        scb->state |= SCB_ACTIVE;
4450        scb->cmd = scmd;
4451
4452        memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
4453
4454        /*
4455         * Is it a passthru command
4456         */
4457        if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
4458
4459                scb->pthru = pthru;
4460        }
4461
4462        scb->idx = CMDID_INT_CMDS;
4463
4464        megaraid_queue_lck(scmd, mega_internal_done);
4465
4466        wait_for_completion(&adapter->int_waitq);
4467
4468        rval = scmd->result;
4469        mc->status = scmd->result;
4470        kfree(sdev);
4471
4472        /*
4473         * Print a debug message for all failed commands. Applications can use
4474         * this information.
4475         */
4476        if( scmd->result && trace_level ) {
4477                printk("megaraid: cmd [%x, %x, %x] status:[%x]\n",
4478                        mc->cmd, mc->opcode, mc->subopcode, scmd->result);
4479        }
4480
4481        mutex_unlock(&adapter->int_mtx);
4482
4483        scsi_free_command(GFP_KERNEL, scmd);
4484
4485        return rval;
4486}
4487
4488
4489/**
4490 * mega_internal_done()
4491 * @scmd - internal scsi command
4492 *
4493 * Callback routine for internal commands.
4494 */
4495static void
4496mega_internal_done(Scsi_Cmnd *scmd)
4497{
4498        adapter_t       *adapter;
4499
4500        adapter = (adapter_t *)scmd->device->host->hostdata;
4501
4502        complete(&adapter->int_waitq);
4503
4504}
4505
4506
4507static struct scsi_host_template megaraid_template = {
4508        .module                         = THIS_MODULE,
4509        .name                           = "MegaRAID",
4510        .proc_name                      = "megaraid_legacy",
4511        .info                           = megaraid_info,
4512        .queuecommand                   = megaraid_queue,       
4513        .bios_param                     = megaraid_biosparam,
4514        .max_sectors                    = MAX_SECTORS_PER_IO,
4515        .can_queue                      = MAX_COMMANDS,
4516        .this_id                        = DEFAULT_INITIATOR_ID,
4517        .sg_tablesize                   = MAX_SGLIST,
4518        .cmd_per_lun                    = DEF_CMD_PER_LUN,
4519        .use_clustering                 = ENABLE_CLUSTERING,
4520        .eh_abort_handler               = megaraid_abort,
4521        .eh_device_reset_handler        = megaraid_reset,
4522        .eh_bus_reset_handler           = megaraid_reset,
4523        .eh_host_reset_handler          = megaraid_reset,
4524};
4525
4526static int __devinit
4527megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
4528{
4529        struct Scsi_Host *host;
4530        adapter_t *adapter;
4531        unsigned long mega_baseport, tbase, flag = 0;
4532        u16 subsysid, subsysvid;
4533        u8 pci_bus, pci_dev_func;
4534        int irq, i, j;
4535        int error = -ENODEV;
4536
4537        if (pci_enable_device(pdev))
4538                goto out;
4539        pci_set_master(pdev);
4540
4541        pci_bus = pdev->bus->number;
4542        pci_dev_func = pdev->devfn;
4543
4544        /*
4545         * The megaraid3 stuff reports the ID of the Intel part which is not
4546         * remotely specific to the megaraid
4547         */
4548        if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
4549                u16 magic;
4550                /*
4551                 * Don't fall over the Compaq management cards using the same
4552                 * PCI identifier
4553                 */
4554                if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
4555                    pdev->subsystem_device == 0xC000)
4556                        return -ENODEV;
4557                /* Now check the magic signature byte */
4558                pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
4559                if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
4560                        return -ENODEV;
4561                /* Ok it is probably a megaraid */
4562        }
4563
4564        /*
4565         * For these vendor and device ids, signature offsets are not
4566         * valid and 64 bit is implicit
4567         */
4568        if (id->driver_data & BOARD_64BIT)
4569                flag |= BOARD_64BIT;
4570        else {
4571                u32 magic64;
4572
4573                pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
4574                if (magic64 == HBA_SIGNATURE_64BIT)
4575                        flag |= BOARD_64BIT;
4576        }
4577
4578        subsysvid = pdev->subsystem_vendor;
4579        subsysid = pdev->subsystem_device;
4580
4581        printk(KERN_NOTICE "megaraid: found 0x%4.04x:0x%4.04x:bus %d:",
4582                id->vendor, id->device, pci_bus);
4583
4584        printk("slot %d:func %d\n",
4585                PCI_SLOT(pci_dev_func), PCI_FUNC(pci_dev_func));
4586
4587        /* Read the base port and IRQ from PCI */
4588        mega_baseport = pci_resource_start(pdev, 0);
4589        irq = pdev->irq;
4590
4591        tbase = mega_baseport;
4592        if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
4593                flag |= BOARD_MEMMAP;
4594
4595                if (!request_mem_region(mega_baseport, 128, "megaraid")) {
4596                        printk(KERN_WARNING "megaraid: mem region busy!\n");
4597                        goto out_disable_device;
4598                }
4599
4600                mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
4601                if (!mega_baseport) {
4602                        printk(KERN_WARNING
4603                               "megaraid: could not map hba memory\n");
4604                        goto out_release_region;
4605                }
4606        } else {
4607                flag |= BOARD_IOMAP;
4608                mega_baseport += 0x10;
4609
4610                if (!request_region(mega_baseport, 16, "megaraid"))
4611                        goto out_disable_device;
4612        }
4613
4614        /* Initialize SCSI Host structure */
4615        host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
4616        if (!host)
4617                goto out_iounmap;
4618
4619        adapter = (adapter_t *)host->hostdata;
4620        memset(adapter, 0, sizeof(adapter_t));
4621
4622        printk(KERN_NOTICE
4623                "scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
4624                host->host_no, mega_baseport, irq);
4625
4626        adapter->base = mega_baseport;
4627        if (flag & BOARD_MEMMAP)
4628                adapter->mmio_base = (void __iomem *) mega_baseport;
4629
4630        INIT_LIST_HEAD(&adapter->free_list);
4631        INIT_LIST_HEAD(&adapter->pending_list);
4632        INIT_LIST_HEAD(&adapter->completed_list);
4633
4634        adapter->flag = flag;
4635        spin_lock_init(&adapter->lock);
4636
4637        host->cmd_per_lun = max_cmd_per_lun;
4638        host->max_sectors = max_sectors_per_io;
4639
4640        adapter->dev = pdev;
4641        adapter->host = host;
4642
4643        adapter->host->irq = irq;
4644
4645        if (flag & BOARD_MEMMAP)
4646                adapter->host->base = tbase;
4647        else {
4648                adapter->host->io_port = tbase;
4649                adapter->host->n_io_port = 16;
4650        }
4651
4652        adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;
4653
4654        /*
4655         * Allocate buffer to issue internal commands.
4656         */
4657        adapter->mega_buffer = pci_alloc_consistent(adapter->dev,
4658                MEGA_BUFFER_SIZE, &adapter->buf_dma_handle);
4659        if (!adapter->mega_buffer) {
4660                printk(KERN_WARNING "megaraid: out of RAM.\n");
4661                goto out_host_put;
4662        }
4663
4664        adapter->scb_list = kmalloc(sizeof(scb_t) * MAX_COMMANDS, GFP_KERNEL);
4665        if (!adapter->scb_list) {
4666                printk(KERN_WARNING "megaraid: out of RAM.\n");
4667                goto out_free_cmd_buffer;
4668        }
4669
4670        if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
4671                                megaraid_isr_memmapped : megaraid_isr_iomapped,
4672                                        IRQF_SHARED, "megaraid", adapter)) {
4673                printk(KERN_WARNING
4674                        "megaraid: Couldn't register IRQ %d!\n", irq);
4675                goto out_free_scb_list;
4676        }
4677
4678        if (mega_setup_mailbox(adapter))
4679                goto out_free_irq;
4680
4681        if (mega_query_adapter(adapter))
4682                goto out_free_mbox;
4683
4684        /*
4685         * Have checks for some buggy f/w
4686         */
4687        if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
4688                /*
4689                 * Which firmware
4690                 */
4691                if (!strcmp(adapter->fw_version, "3.00") ||
4692                                !strcmp(adapter->fw_version, "3.01")) {
4693
4694                        printk( KERN_WARNING
4695                                "megaraid: Your  card is a Dell PERC "
4696                                "2/SC RAID controller with  "
4697                                "firmware\nmegaraid: 3.00 or 3.01.  "
4698                                "This driver is known to have "
4699                                "corruption issues\nmegaraid: with "
4700                                "those firmware versions on this "
4701                                "specific card.  In order\nmegaraid: "
4702                                "to protect your data, please upgrade "
4703                                "your firmware to version\nmegaraid: "
4704                                "3.10 or later, available from the "
4705                                "Dell Technical Support web\n"
4706                                "megaraid: site at\nhttp://support."
4707                                "dell.com/us/en/filelib/download/"
4708                                "index.asp?fileid=2940\n"
4709                        );
4710                }
4711        }
4712
4713        /*
4714         * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
4715         * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
4716         * support, since this firmware cannot handle 64 bit
4717         * addressing
4718         */
4719        if ((subsysvid == HP_SUBSYS_VID) &&
4720            ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
4721                /*
4722                 * which firmware
4723                 */
4724                if (!strcmp(adapter->fw_version, "H01.07") ||
4725                    !strcmp(adapter->fw_version, "H01.08") ||
4726                    !strcmp(adapter->fw_version, "H01.09") ) {
4727                        printk(KERN_WARNING
4728                                "megaraid: Firmware H.01.07, "
4729                                "H.01.08, and H.01.09 on 1M/2M "
4730                                "controllers\n"
4731                                "megaraid: do not support 64 bit "
4732                                "addressing.\nmegaraid: DISABLING "
4733                                "64 bit support.\n");
4734                        adapter->flag &= ~BOARD_64BIT;
4735                }
4736        }
4737
4738        if (mega_is_bios_enabled(adapter))
4739                mega_hbas[hba_count].is_bios_enabled = 1;
4740        mega_hbas[hba_count].hostdata_addr = adapter;
4741
4742        /*
4743         * Find out which channel is raid and which is scsi. This is
4744         * for ROMB support.
4745         */
4746        mega_enum_raid_scsi(adapter);
4747
4748        /*
4749         * Find out if a logical drive is set as the boot drive. If
4750         * there is one, will make that as the first logical drive.
4751         * ROMB: Do we have to boot from a physical drive. Then all
4752         * the physical drives would appear before the logical disks.
4753         * Else, all the physical drives would be exported to the mid
4754         * layer after logical drives.
4755         */
4756        mega_get_boot_drv(adapter);
4757
4758        if (adapter->boot_pdrv_enabled) {
4759                j = adapter->product_info.nchannels;
4760                for( i = 0; i < j; i++ )
4761                        adapter->logdrv_chan[i] = 0;
4762                for( i = j; i < NVIRT_CHAN + j; i++ )
4763                        adapter->logdrv_chan[i] = 1;
4764        } else {
4765                for (i = 0; i < NVIRT_CHAN; i++)
4766                        adapter->logdrv_chan[i] = 1;
4767                for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
4768                        adapter->logdrv_chan[i] = 0;
4769                adapter->mega_ch_class <<= NVIRT_CHAN;
4770        }
4771
4772        /*
4773         * Do we support random deletion and addition of logical
4774         * drives
4775         */
4776        adapter->read_ldidmap = 0;      /* set it after first logdrv
4777                                                   delete cmd */
4778        adapter->support_random_del = mega_support_random_del(adapter);
4779
4780        /* Initialize SCBs */
4781        if (mega_init_scb(adapter))
4782                goto out_free_mbox;
4783
4784        /*
4785         * Reset the pending commands counter
4786         */
4787        atomic_set(&adapter->pend_cmds, 0);
4788
4789        /*
4790         * Reset the adapter quiescent flag
4791         */
4792        atomic_set(&adapter->quiescent, 0);
4793
4794        hba_soft_state[hba_count] = adapter;
4795
4796        /*
4797         * Fill in the structure which needs to be passed back to the
4798         * application when it does an ioctl() for controller related
4799         * information.
4800         */
4801        i = hba_count;
4802
4803        mcontroller[i].base = mega_baseport;
4804        mcontroller[i].irq = irq;
4805        mcontroller[i].numldrv = adapter->numldrv;
4806        mcontroller[i].pcibus = pci_bus;
4807        mcontroller[i].pcidev = id->device;
4808        mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
4809        mcontroller[i].pciid = -1;
4810        mcontroller[i].pcivendor = id->vendor;
4811        mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
4812        mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;
4813
4814
4815        /* Set the Mode of addressing to 64 bit if we can */
4816        if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
4817                pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4818                adapter->has_64bit_addr = 1;
4819        } else  {
4820                pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4821                adapter->has_64bit_addr = 0;
4822        }
4823                
4824        mutex_init(&adapter->int_mtx);
4825        init_completion(&adapter->int_waitq);
4826
4827        adapter->this_id = DEFAULT_INITIATOR_ID;
4828        adapter->host->this_id = DEFAULT_INITIATOR_ID;
4829
4830#if MEGA_HAVE_CLUSTERING
4831        /*
4832         * Is cluster support enabled on this controller
4833         * Note: In a cluster the HBAs ( the initiators ) will have
4834         * different target IDs and we cannot assume it to be 7. Call
4835         * to mega_support_cluster() will get the target ids also if
4836         * the cluster support is available
4837         */
4838        adapter->has_cluster = mega_support_cluster(adapter);
4839        if (adapter->has_cluster) {
4840                printk(KERN_NOTICE
4841                        "megaraid: Cluster driver, initiator id:%d\n",
4842                        adapter->this_id);
4843        }
4844#endif
4845
4846        pci_set_drvdata(pdev, host);
4847
4848        mega_create_proc_entry(hba_count, mega_proc_dir_entry);
4849
4850        error = scsi_add_host(host, &pdev->dev);
4851        if (error)
4852                goto out_free_mbox;
4853
4854        scsi_scan_host(host);
4855        hba_count++;
4856        return 0;
4857
4858 out_free_mbox:
4859        pci_free_consistent(adapter->dev, sizeof(mbox64_t),
4860                        adapter->una_mbox64, adapter->una_mbox64_dma);
4861 out_free_irq:
4862        free_irq(adapter->host->irq, adapter);
4863 out_free_scb_list:
4864        kfree(adapter->scb_list);
4865 out_free_cmd_buffer:
4866        pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
4867                        adapter->mega_buffer, adapter->buf_dma_handle);
4868 out_host_put:
4869        scsi_host_put(host);
4870 out_iounmap:
4871        if (flag & BOARD_MEMMAP)
4872                iounmap((void *)mega_baseport);
4873 out_release_region:
4874        if (flag & BOARD_MEMMAP)
4875                release_mem_region(tbase, 128);
4876        else
4877                release_region(mega_baseport, 16);
4878 out_disable_device:
4879        pci_disable_device(pdev);
4880 out:
4881        return error;
4882}
4883
4884static void
4885__megaraid_shutdown(adapter_t *adapter)
4886{
4887        u_char  raw_mbox[sizeof(struct mbox_out)];
4888        mbox_t  *mbox = (mbox_t *)raw_mbox;
4889        int     i;
4890
4891        /* Flush adapter cache */
4892        memset(&mbox->m_out, 0, sizeof(raw_mbox));
4893        raw_mbox[0] = FLUSH_ADAPTER;
4894
4895        free_irq(adapter->host->irq, adapter);
4896
4897        /* Issue a blocking (interrupts disabled) command to the card */
4898        issue_scb_block(adapter, raw_mbox);
4899
4900        /* Flush disks cache */
4901        memset(&mbox->m_out, 0, sizeof(raw_mbox));
4902        raw_mbox[0] = FLUSH_SYSTEM;
4903
4904        /* Issue a blocking (interrupts disabled) command to the card */
4905        issue_scb_block(adapter, raw_mbox);
4906        
4907        if (atomic_read(&adapter->pend_cmds) > 0)
4908                printk(KERN_WARNING "megaraid: pending commands!!\n");
4909
4910        /*
4911         * Have a delibrate delay to make sure all the caches are
4912         * actually flushed.
4913         */
4914        for (i = 0; i <= 10; i++)
4915                mdelay(1000);
4916}
4917
4918static void __devexit
4919megaraid_remove_one(struct pci_dev *pdev)
4920{
4921        struct Scsi_Host *host = pci_get_drvdata(pdev);
4922        adapter_t *adapter = (adapter_t *)host->hostdata;
4923
4924        scsi_remove_host(host);
4925
4926        __megaraid_shutdown(adapter);
4927
4928        /* Free our resources */
4929        if (adapter->flag & BOARD_MEMMAP) {
4930                iounmap((void *)adapter->base);
4931                release_mem_region(adapter->host->base, 128);
4932        } else
4933                release_region(adapter->base, 16);
4934
4935        mega_free_sgl(adapter);
4936
4937#ifdef CONFIG_PROC_FS
4938        if (adapter->controller_proc_dir_entry) {
4939                remove_proc_entry("stat", adapter->controller_proc_dir_entry);
4940                remove_proc_entry("config",
4941                                adapter->controller_proc_dir_entry);
4942                remove_proc_entry("mailbox",
4943                                adapter->controller_proc_dir_entry);
4944#if MEGA_HAVE_ENH_PROC
4945                remove_proc_entry("rebuild-rate",
4946                                adapter->controller_proc_dir_entry);
4947                remove_proc_entry("battery-status",
4948                                adapter->controller_proc_dir_entry);
4949
4950                remove_proc_entry("diskdrives-ch0",
4951                                adapter->controller_proc_dir_entry);
4952                remove_proc_entry("diskdrives-ch1",
4953                                adapter->controller_proc_dir_entry);
4954                remove_proc_entry("diskdrives-ch2",
4955                                adapter->controller_proc_dir_entry);
4956                remove_proc_entry("diskdrives-ch3",
4957                                adapter->controller_proc_dir_entry);
4958
4959                remove_proc_entry("raiddrives-0-9",
4960                                adapter->controller_proc_dir_entry);
4961                remove_proc_entry("raiddrives-10-19",
4962                                adapter->controller_proc_dir_entry);
4963                remove_proc_entry("raiddrives-20-29",
4964                                adapter->controller_proc_dir_entry);
4965                remove_proc_entry("raiddrives-30-39",
4966                                adapter->controller_proc_dir_entry);
4967#endif
4968                {
4969                        char    buf[12] = { 0 };
4970                        sprintf(buf, "hba%d", adapter->host->host_no);
4971                        remove_proc_entry(buf, mega_proc_dir_entry);
4972                }
4973        }
4974#endif
4975
4976        pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
4977                        adapter->mega_buffer, adapter->buf_dma_handle);
4978        kfree(adapter->scb_list);
4979        pci_free_consistent(adapter->dev, sizeof(mbox64_t),
4980                        adapter->una_mbox64, adapter->una_mbox64_dma);
4981
4982        scsi_host_put(host);
4983        pci_disable_device(pdev);
4984
4985        hba_count--;
4986}
4987
4988static void
4989megaraid_shutdown(struct pci_dev *pdev)
4990{
4991        struct Scsi_Host *host = pci_get_drvdata(pdev);
4992        adapter_t *adapter = (adapter_t *)host->hostdata;
4993
4994        __megaraid_shutdown(adapter);
4995}
4996
4997static struct pci_device_id megaraid_pci_tbl[] = {
4998        {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID,
4999                PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
5000        {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2,
5001                PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
5002        {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3,
5003                PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
5004        {0,}
5005};
5006MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl);
5007
5008static struct pci_driver megaraid_pci_driver = {
5009        .name           = "megaraid_legacy",
5010        .id_table       = megaraid_pci_tbl,
5011        .probe          = megaraid_probe_one,
5012        .remove         = __devexit_p(megaraid_remove_one),
5013        .shutdown       = megaraid_shutdown,
5014};
5015
5016static int __init megaraid_init(void)
5017{
5018        int error;
5019
5020        if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN))
5021                max_cmd_per_lun = MAX_CMD_PER_LUN;
5022        if (max_mbox_busy_wait > MBOX_BUSY_WAIT)
5023                max_mbox_busy_wait = MBOX_BUSY_WAIT;
5024
5025#ifdef CONFIG_PROC_FS
5026        mega_proc_dir_entry = proc_mkdir("megaraid", NULL);
5027        if (!mega_proc_dir_entry) {
5028                printk(KERN_WARNING
5029                                "megaraid: failed to create megaraid root\n");
5030        }
5031#endif
5032        error = pci_register_driver(&megaraid_pci_driver);
5033        if (error) {
5034#ifdef CONFIG_PROC_FS
5035                remove_proc_entry("megaraid", NULL);
5036#endif
5037                return error;
5038        }
5039
5040        /*
5041         * Register the driver as a character device, for applications
5042         * to access it for ioctls.
5043         * First argument (major) to register_chrdev implies a dynamic
5044         * major number allocation.
5045         */
5046        major = register_chrdev(0, "megadev_legacy", &megadev_fops);
5047        if (!major) {
5048                printk(KERN_WARNING
5049                                "megaraid: failed to register char device\n");
5050        }
5051
5052        return 0;
5053}
5054
5055static void __exit megaraid_exit(void)
5056{
5057        /*
5058         * Unregister the character device interface to the driver.
5059         */
5060        unregister_chrdev(major, "megadev_legacy");
5061
5062        pci_unregister_driver(&megaraid_pci_driver);
5063
5064#ifdef CONFIG_PROC_FS
5065        remove_proc_entry("megaraid", NULL);
5066#endif
5067}
5068
5069module_init(megaraid_init);
5070module_exit(megaraid_exit);
5071
5072/* vi: set ts=8 sw=8 tw=78: */
5073
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