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