drivers/scsi/megaraid.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *
   4  *                      Linux MegaRAID device driver
   5  *
   6  * Copyright (c) 2002  LSI Logic Corporation.
   7  *
   8  * Copyright (c) 2002  Red Hat, Inc. All rights reserved.
   9  *        - fixes
  10  *        - speed-ups (list handling fixes, issued_list, optimizations.)
  11  *        - lots of cleanups.
  12  *
  13  * Copyright (c) 2003  Christoph Hellwig  <hch@lst.de>
  14  *        - new-style, hotplug-aware pci probing and scsi registration
  15  *
  16  * Version : v2.00.4 Mon Nov 14 14:02:43 EST 2005 - Seokmann Ju
  17  *                                              <Seokmann.Ju@lsil.com>
  18  *
  19  * Description: Linux device driver for LSI Logic MegaRAID controller
  20  *
  21  * Supported controllers: MegaRAID 418, 428, 438, 466, 762, 467, 471, 490, 493
  22  *                                      518, 520, 531, 532
  23  *
  24  * This driver is supported by LSI Logic, with assistance from Red Hat, Dell,
  25  * and others. Please send updates to the mailing list
  26  * linux-scsi@vger.kernel.org .
  27  */
  28
  29 #include <linux/mm.h>
  30 #include <linux/fs.h>
  31 #include <linux/blkdev.h>
  32 #include <linux/uaccess.h>
  33 #include <asm/io.h>
  34 #include <linux/completion.h>
  35 #include <linux/delay.h>
  36 #include <linux/proc_fs.h>
  37 #include <linux/seq_file.h>
  38 #include <linux/reboot.h>
  39 #include <linux/module.h>
  40 #include <linux/list.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/pci.h>
  43 #include <linux/init.h>
  44 #include <linux/dma-mapping.h>
  45 #include <linux/mutex.h>
  46 #include <linux/slab.h>
  47 #include <scsi/scsicam.h>
  48
  49 #include "scsi.h"
  50 #include <scsi/scsi_host.h>
  51
  52 #include "megaraid.h"
  53
  54 #define MEGARAID_MODULE_VERSION "2.00.4"
  55
  56 MODULE_AUTHOR ("sju@lsil.com");
  57 MODULE_DESCRIPTION ("LSI Logic MegaRAID legacy driver");
  58 MODULE_LICENSE ("GPL");
  59 MODULE_VERSION(MEGARAID_MODULE_VERSION);
  60
  61 static DEFINE_MUTEX(megadev_mutex);
  62 static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
  63 module_param(max_cmd_per_lun, uint, 0);
  64 MODULE_PARM_DESC(max_cmd_per_lun, "Maximum number of commands which can be issued to a single LUN (default=DEF_CMD_PER_LUN=63)");
  65
  66 static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO;
  67 module_param(max_sectors_per_io, ushort, 0);
  68 MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)");
  69
  70
  71 static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT;
  72 module_param(max_mbox_busy_wait, ushort, 0);
  73 MODULE_PARM_DESC(max_mbox_busy_wait, "Maximum wait for mailbox in microseconds if busy (default=MBOX_BUSY_WAIT=10)");
  74
  75 #define RDINDOOR(adapter)       readl((adapter)->mmio_base + 0x20)
  76 #define RDOUTDOOR(adapter)      readl((adapter)->mmio_base + 0x2C)
  77 #define WRINDOOR(adapter,value)  writel(value, (adapter)->mmio_base + 0x20)
  78 #define WROUTDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x2C)
  79
  80 /*
  81  * Global variables
  82  */
  83
  84 static int hba_count;
  85 static adapter_t *hba_soft_state[MAX_CONTROLLERS];
  86 static struct proc_dir_entry *mega_proc_dir_entry;
  87
  88 /* For controller re-ordering */
  89 static struct mega_hbas mega_hbas[MAX_CONTROLLERS];
  90
  91 static long
  92 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
  93
  94 /*
  95  * The File Operations structure for the serial/ioctl interface of the driver
  96  */
  97 static const struct file_operations megadev_fops = {
  98         .owner          = THIS_MODULE,
  99         .unlocked_ioctl = megadev_unlocked_ioctl,
 100         .open           = megadev_open,
 101         .llseek         = noop_llseek,
 102 };
 103
 104 /*
 105  * Array to structures for storing the information about the controllers. This
 106  * information is sent to the user level applications, when they do an ioctl
 107  * for this information.
 108  */
 109 static struct mcontroller mcontroller[MAX_CONTROLLERS];
 110
 111 /* The current driver version */
 112 static u32 driver_ver = 0x02000000;
 113
 114 /* major number used by the device for character interface */
 115 static int major;
 116
 117 #define IS_RAID_CH(hba, ch)     (((hba)->mega_ch_class >> (ch)) & 0x01)
 118
 119
 120 /*
 121  * Debug variable to print some diagnostic messages
 122  */
 123 static int trace_level;
 124
 125 /**
 126  * mega_setup_mailbox()
 127  * @adapter: pointer to our soft state
 128  *
 129  * Allocates a 8 byte aligned memory for the handshake mailbox.
 130  */
 131 static int
 132 mega_setup_mailbox(adapter_t *adapter)
 133 {
 134         unsigned long   align;
 135
 136         adapter->una_mbox64 = dma_alloc_coherent(&adapter->dev->dev,
 137                                                  sizeof(mbox64_t),
 138                                                  &adapter->una_mbox64_dma,
 139                                                  GFP_KERNEL);
 140
 141         if( !adapter->una_mbox64 ) return -1;
 142
 143         adapter->mbox = &adapter->una_mbox64->mbox;
 144
 145         adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) &
 146                         (~0UL ^ 0xFUL));
 147
 148         adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8);
 149
 150         align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox);
 151
 152         adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align;
 153
 154         /*
 155          * Register the mailbox if the controller is an io-mapped controller
 156          */
 157         if( adapter->flag & BOARD_IOMAP ) {
 158
 159                 outb(adapter->mbox_dma & 0xFF,
 160                                 adapter->host->io_port + MBOX_PORT0);
 161
 162                 outb((adapter->mbox_dma >> 8) & 0xFF,
 163                                 adapter->host->io_port + MBOX_PORT1);
 164
 165                 outb((adapter->mbox_dma >> 16) & 0xFF,
 166                                 adapter->host->io_port + MBOX_PORT2);
 167
 168                 outb((adapter->mbox_dma >> 24) & 0xFF,
 169                                 adapter->host->io_port + MBOX_PORT3);
 170
 171                 outb(ENABLE_MBOX_BYTE,
 172                                 adapter->host->io_port + ENABLE_MBOX_REGION);
 173
 174                 irq_ack(adapter);
 175
 176                 irq_enable(adapter);
 177         }
 178
 179         return 0;
 180 }
 181
 182
 183 /*
 184  * mega_query_adapter()
 185  * @adapter - pointer to our soft state
 186  *
 187  * Issue the adapter inquiry commands to the controller and find out
 188  * information and parameter about the devices attached
 189  */
 190 static int
 191 mega_query_adapter(adapter_t *adapter)
 192 {
 193         dma_addr_t      prod_info_dma_handle;
 194         mega_inquiry3   *inquiry3;
 195         u8      raw_mbox[sizeof(struct mbox_out)];
 196         mbox_t  *mbox;
 197         int     retval;
 198
 199         /* Initialize adapter inquiry mailbox */
 200
 201         mbox = (mbox_t *)raw_mbox;
 202
 203         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
 204         memset(&mbox->m_out, 0, sizeof(raw_mbox));
 205
 206         /*
 207          * Try to issue Inquiry3 command
 208          * if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
 209          * update enquiry3 structure
 210          */
 211         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
 212
 213         inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;
 214
 215         raw_mbox[0] = FC_NEW_CONFIG;            /* i.e. mbox->cmd=0xA1 */
 216         raw_mbox[2] = NC_SUBOP_ENQUIRY3;        /* i.e. 0x0F */
 217         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;  /* i.e. 0x02 */
 218
 219         /* Issue a blocking command to the card */
 220         if ((retval = issue_scb_block(adapter, raw_mbox))) {
 221                 /* the adapter does not support 40ld */
 222
 223                 mraid_ext_inquiry       *ext_inq;
 224                 mraid_inquiry           *inq;
 225                 dma_addr_t              dma_handle;
 226
 227                 ext_inq = dma_alloc_coherent(&adapter->dev->dev,
 228                                              sizeof(mraid_ext_inquiry),
 229                                              &dma_handle, GFP_KERNEL);
 230
 231                 if( ext_inq == NULL ) return -1;
 232
 233                 inq = &ext_inq->raid_inq;
 234
 235                 mbox->m_out.xferaddr = (u32)dma_handle;
 236
 237                 /*issue old 0x04 command to adapter */
 238                 mbox->m_out.cmd = MEGA_MBOXCMD_ADPEXTINQ;
 239
 240                 issue_scb_block(adapter, raw_mbox);
 241
 242                 /*
 243                  * update Enquiry3 and ProductInfo structures with
 244                  * mraid_inquiry structure
 245                  */
 246                 mega_8_to_40ld(inq, inquiry3,
 247                                 (mega_product_info *)&adapter->product_info);
 248
 249                 dma_free_coherent(&adapter->dev->dev,
 250                                   sizeof(mraid_ext_inquiry), ext_inq,
 251                                   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 = dma_map_single(&adapter->dev->dev,
 261                                                       (void *)&adapter->product_info,
 262                                                       sizeof(mega_product_info),
 263                                                       DMA_FROM_DEVICE);
 264
 265                 mbox->m_out.xferaddr = prod_info_dma_handle;
 266
 267                 raw_mbox[0] = FC_NEW_CONFIG;    /* i.e. mbox->cmd=0xA1 */
 268                 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;    /* i.e. 0x0E */
 269
 270                 if ((retval = issue_scb_block(adapter, raw_mbox)))
 271                         dev_warn(&adapter->dev->dev,
 272                                 "Product_info cmd failed with error: %d\n",
 273                                 retval);
 274
 275                 dma_unmap_single(&adapter->dev->dev, prod_info_dma_handle,
 276                                  sizeof(mega_product_info), DMA_FROM_DEVICE);
 277         }
 278
 279
 280         /*
 281          * kernel scans the channels from 0 to <= max_channel
 282          */
 283         adapter->host->max_channel =
 284                 adapter->product_info.nchannels + NVIRT_CHAN -1;
 285
 286         adapter->host->max_id = 16;     /* max targets per channel */
 287
 288         adapter->host->max_lun = 7;     /* Up to 7 luns for non disk devices */
 289
 290         adapter->host->cmd_per_lun = max_cmd_per_lun;
 291
 292         adapter->numldrv = inquiry3->num_ldrv;
 293
 294         adapter->max_cmds = adapter->product_info.max_commands;
 295
 296         if(adapter->max_cmds > MAX_COMMANDS)
 297                 adapter->max_cmds = MAX_COMMANDS;
 298
 299         adapter->host->can_queue = adapter->max_cmds - 1;
 300
 301         /*
 302          * Get the maximum number of scatter-gather elements supported by this
 303          * firmware
 304          */
 305         mega_get_max_sgl(adapter);
 306
 307         adapter->host->sg_tablesize = adapter->sglen;
 308
 309         /* use HP firmware and bios version encoding
 310            Note: fw_version[0|1] and bios_version[0|1] were originally shifted
 311            right 8 bits making them zero. This 0 value was hardcoded to fix
 312            sparse warnings. */
 313         if (adapter->product_info.subsysvid == PCI_VENDOR_ID_HP) {
 314                 snprintf(adapter->fw_version, sizeof(adapter->fw_version),
 315                          "%c%d%d.%d%d",
 316                          adapter->product_info.fw_version[2],
 317                          0,
 318                          adapter->product_info.fw_version[1] & 0x0f,
 319                          0,
 320                          adapter->product_info.fw_version[0] & 0x0f);
 321                 snprintf(adapter->bios_version, sizeof(adapter->fw_version),
 322                          "%c%d%d.%d%d",
 323                          adapter->product_info.bios_version[2],
 324                          0,
 325                          adapter->product_info.bios_version[1] & 0x0f,
 326                          0,
 327                          adapter->product_info.bios_version[0] & 0x0f);
 328         } else {
 329                 memcpy(adapter->fw_version,
 330                                 (char *)adapter->product_info.fw_version, 4);
 331                 adapter->fw_version[4] = 0;
 332
 333                 memcpy(adapter->bios_version,
 334                                 (char *)adapter->product_info.bios_version, 4);
 335
 336                 adapter->bios_version[4] = 0;
 337         }
 338
 339         dev_notice(&adapter->dev->dev, "[%s:%s] detected %d logical drives\n",
 340                 adapter->fw_version, adapter->bios_version, adapter->numldrv);
 341
 342         /*
 343          * Do we support extended (>10 bytes) cdbs
 344          */
 345         adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
 346         if (adapter->support_ext_cdb)
 347                 dev_notice(&adapter->dev->dev, "supports extended CDBs\n");
 348
 349
 350         return 0;
 351 }
 352
 353 /**
 354  * mega_runpendq()
 355  * @adapter: pointer to our soft state
 356  *
 357  * Runs through the list of pending requests.
 358  */
 359 static inline void
 360 mega_runpendq(adapter_t *adapter)
 361 {
 362         if(!list_empty(&adapter->pending_list))
 363                 __mega_runpendq(adapter);
 364 }
 365
 366 /*
 367  * megaraid_queue()
 368  * @scmd - Issue this scsi command
 369  * @done - the callback hook into the scsi mid-layer
 370  *
 371  * The command queuing entry point for the mid-layer.
 372  */
 373 static int
 374 megaraid_queue_lck(struct scsi_cmnd *scmd, void (*done)(struct scsi_cmnd *))
 375 {
 376         adapter_t       *adapter;
 377         scb_t   *scb;
 378         int     busy=0;
 379         unsigned long flags;
 380
 381         adapter = (adapter_t *)scmd->device->host->hostdata;
 382
 383         scmd->scsi_done = done;
 384
 385
 386         /*
 387          * Allocate and build a SCB request
 388          * busy flag will be set if mega_build_cmd() command could not
 389          * allocate scb. We will return non-zero status in that case.
 390          * NOTE: scb can be null even though certain commands completed
 391          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, we would
 392          * return 0 in that case.
 393          */
 394
 395         spin_lock_irqsave(&adapter->lock, flags);
 396         scb = mega_build_cmd(adapter, scmd, &busy);
 397         if (!scb)
 398                 goto out;
 399
 400         scb->state |= SCB_PENDQ;
 401         list_add_tail(&scb->list, &adapter->pending_list);
 402
 403         /*
 404          * Check if the HBA is in quiescent state, e.g., during a
 405          * delete logical drive opertion. If it is, don't run
 406          * the pending_list.
 407          */
 408         if (atomic_read(&adapter->quiescent) == 0)
 409                 mega_runpendq(adapter);
 410
 411         busy = 0;
 412  out:
 413         spin_unlock_irqrestore(&adapter->lock, flags);
 414         return busy;
 415 }
 416
 417 static DEF_SCSI_QCMD(megaraid_queue)
 418
 419 /**
 420  * mega_allocate_scb()
 421  * @adapter: pointer to our soft state
 422  * @cmd: scsi command from the mid-layer
 423  *
 424  * Allocate a SCB structure. This is the central structure for controller
 425  * commands.
 426  */
 427 static inline scb_t *
 428 mega_allocate_scb(adapter_t *adapter, struct scsi_cmnd *cmd)
 429 {
 430         struct list_head *head = &adapter->free_list;
 431         scb_t   *scb;
 432
 433         /* Unlink command from Free List */
 434         if( !list_empty(head) ) {
 435
 436                 scb = list_entry(head->next, scb_t, list);
 437
 438                 list_del_init(head->next);
 439
 440                 scb->state = SCB_ACTIVE;
 441                 scb->cmd = cmd;
 442                 scb->dma_type = MEGA_DMA_TYPE_NONE;
 443
 444                 return scb;
 445         }
 446
 447         return NULL;
 448 }
 449
 450 /**
 451  * mega_get_ldrv_num()
 452  * @adapter: pointer to our soft state
 453  * @cmd: scsi mid layer command
 454  * @channel: channel on the controller
 455  *
 456  * Calculate the logical drive number based on the information in scsi command
 457  * and the channel number.
 458  */
 459 static inline int
 460 mega_get_ldrv_num(adapter_t *adapter, struct scsi_cmnd *cmd, int channel)
 461 {
 462         int             tgt;
 463         int             ldrv_num;
 464
 465         tgt = cmd->device->id;
 466
 467         if ( tgt > adapter->this_id )
 468                 tgt--;  /* we do not get inquires for initiator id */
 469
 470         ldrv_num = (channel * 15) + tgt;
 471
 472
 473         /*
 474          * If we have a logical drive with boot enabled, project it first
 475          */
 476         if( adapter->boot_ldrv_enabled ) {
 477                 if( ldrv_num == 0 ) {
 478                         ldrv_num = adapter->boot_ldrv;
 479                 }
 480                 else {
 481                         if( ldrv_num <= adapter->boot_ldrv ) {
 482                                 ldrv_num--;
 483                         }
 484                 }
 485         }
 486
 487         /*
 488          * If "delete logical drive" feature is enabled on this controller.
 489          * Do only if at least one delete logical drive operation was done.
 490          *
 491          * Also, after logical drive deletion, instead of logical drive number,
 492          * the value returned should be 0x80+logical drive id.
 493          *
 494          * These is valid only for IO commands.
 495          */
 496
 497         if (adapter->support_random_del && adapter->read_ldidmap )
 498                 switch (cmd->cmnd[0]) {
 499                 case READ_6:
 500                 case WRITE_6:
 501                 case READ_10:
 502                 case WRITE_10:
 503                         ldrv_num += 0x80;
 504                 }
 505
 506         return ldrv_num;
 507 }
 508
 509 /**
 510  * mega_build_cmd()
 511  * @adapter: pointer to our soft state
 512  * @cmd: Prepare using this scsi command
 513  * @busy: busy flag if no resources
 514  *
 515  * Prepares a command and scatter gather list for the controller. This routine
 516  * also finds out if the commands is intended for a logical drive or a
 517  * physical device and prepares the controller command accordingly.
 518  *
 519  * We also re-order the logical drives and physical devices based on their
 520  * boot settings.
 521  */
 522 static scb_t *
 523 mega_build_cmd(adapter_t *adapter, struct scsi_cmnd *cmd, int *busy)
 524 {
 525         mega_passthru   *pthru;
 526         scb_t   *scb;
 527         mbox_t  *mbox;
 528         u32     seg;
 529         char    islogical;
 530         int     max_ldrv_num;
 531         int     channel = 0;
 532         int     target = 0;
 533         int     ldrv_num = 0;   /* logical drive number */
 534
 535         /*
 536          * We know what channels our logical drives are on - mega_find_card()
 537          */
 538         islogical = adapter->logdrv_chan[cmd->device->channel];
 539
 540         /*
 541          * The theory: If physical drive is chosen for boot, all the physical
 542          * devices are exported before the logical drives, otherwise physical
 543          * devices are pushed after logical drives, in which case - Kernel sees
 544          * the physical devices on virtual channel which is obviously converted
 545          * to actual channel on the HBA.
 546          */
 547         if( adapter->boot_pdrv_enabled ) {
 548                 if( islogical ) {
 549                         /* logical channel */
 550                         channel = cmd->device->channel -
 551                                 adapter->product_info.nchannels;
 552                 }
 553                 else {
 554                         /* this is physical channel */
 555                         channel = cmd->device->channel;
 556                         target = cmd->device->id;
 557
 558                         /*
 559                          * boot from a physical disk, that disk needs to be
 560                          * exposed first IF both the channels are SCSI, then
 561                          * booting from the second channel is not allowed.
 562                          */
 563                         if( target == 0 ) {
 564                                 target = adapter->boot_pdrv_tgt;
 565                         }
 566                         else if( target == adapter->boot_pdrv_tgt ) {
 567                                 target = 0;
 568                         }
 569                 }
 570         }
 571         else {
 572                 if( islogical ) {
 573                         /* this is the logical channel */
 574                         channel = cmd->device->channel;
 575                 }
 576                 else {
 577                         /* physical channel */
 578                         channel = cmd->device->channel - NVIRT_CHAN;
 579                         target = cmd->device->id;
 580                 }
 581         }
 582
 583
 584         if(islogical) {
 585
 586                 /* have just LUN 0 for each target on virtual channels */
 587                 if (cmd->device->lun) {
 588                         cmd->result = (DID_BAD_TARGET << 16);
 589                         cmd->scsi_done(cmd);
 590                         return NULL;
 591                 }
 592
 593                 ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);
 594
 595
 596                 max_ldrv_num = (adapter->flag & BOARD_40LD) ?
 597                         MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;
 598
 599                 /*
 600                  * max_ldrv_num increases by 0x80 if some logical drive was
 601                  * deleted.
 602                  */
 603                 if(adapter->read_ldidmap)
 604                         max_ldrv_num += 0x80;
 605
 606                 if(ldrv_num > max_ldrv_num ) {
 607                         cmd->result = (DID_BAD_TARGET << 16);
 608                         cmd->scsi_done(cmd);
 609                         return NULL;
 610                 }
 611
 612         }
 613         else {
 614                 if( cmd->device->lun > 7) {
 615                         /*
 616                          * Do not support lun >7 for physically accessed
 617                          * devices
 618                          */
 619                         cmd->result = (DID_BAD_TARGET << 16);
 620                         cmd->scsi_done(cmd);
 621                         return NULL;
 622                 }
 623         }
 624
 625         /*
 626          *
 627          * Logical drive commands
 628          *
 629          */
 630         if(islogical) {
 631                 switch (cmd->cmnd[0]) {
 632                 case TEST_UNIT_READY:
 633 #if MEGA_HAVE_CLUSTERING
 634                         /*
 635                          * Do we support clustering and is the support enabled
 636                          * If no, return success always
 637                          */
 638                         if( !adapter->has_cluster ) {
 639                                 cmd->result = (DID_OK << 16);
 640                                 cmd->scsi_done(cmd);
 641                                 return NULL;
 642                         }
 643
 644                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 645                                 *busy = 1;
 646                                 return NULL;
 647                         }
 648
 649                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 650                         scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
 651                         scb->raw_mbox[3] = ldrv_num;
 652
 653                         scb->dma_direction = DMA_NONE;
 654
 655                         return scb;
 656 #else
 657                         cmd->result = (DID_OK << 16);
 658                         cmd->scsi_done(cmd);
 659                         return NULL;
 660 #endif
 661
 662                 case MODE_SENSE: {
 663                         char *buf;
 664                         struct scatterlist *sg;
 665
 666                         sg = scsi_sglist(cmd);
 667                         buf = kmap_atomic(sg_page(sg)) + sg->offset;
 668
 669                         memset(buf, 0, cmd->cmnd[4]);
 670                         kunmap_atomic(buf - sg->offset);
 671
 672                         cmd->result = (DID_OK << 16);
 673                         cmd->scsi_done(cmd);
 674                         return NULL;
 675                 }
 676
 677                 case READ_CAPACITY:
 678                 case INQUIRY:
 679
 680                         if(!(adapter->flag & (1L << cmd->device->channel))) {
 681
 682                                 dev_notice(&adapter->dev->dev,
 683                                         "scsi%d: scanning scsi channel %d "
 684                                         "for logical drives\n",
 685                                                 adapter->host->host_no,
 686                                                 cmd->device->channel);
 687
 688                                 adapter->flag |= (1L << cmd->device->channel);
 689                         }
 690
 691                         /* Allocate a SCB and initialize passthru */
 692                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 693                                 *busy = 1;
 694                                 return NULL;
 695                         }
 696                         pthru = scb->pthru;
 697
 698                         mbox = (mbox_t *)scb->raw_mbox;
 699                         memset(mbox, 0, sizeof(scb->raw_mbox));
 700                         memset(pthru, 0, sizeof(mega_passthru));
 701
 702                         pthru->timeout = 0;
 703                         pthru->ars = 1;
 704                         pthru->reqsenselen = 14;
 705                         pthru->islogical = 1;
 706                         pthru->logdrv = ldrv_num;
 707                         pthru->cdblen = cmd->cmd_len;
 708                         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 709
 710                         if( adapter->has_64bit_addr ) {
 711                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 712                         }
 713                         else {
 714                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 715                         }
 716
 717                         scb->dma_direction = DMA_FROM_DEVICE;
 718
 719                         pthru->numsgelements = mega_build_sglist(adapter, scb,
 720                                 &pthru->dataxferaddr, &pthru->dataxferlen);
 721
 722                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 723
 724                         return scb;
 725
 726                 case READ_6:
 727                 case WRITE_6:
 728                 case READ_10:
 729                 case WRITE_10:
 730                 case READ_12:
 731                 case WRITE_12:
 732
 733                         /* Allocate a SCB and initialize mailbox */
 734                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 735                                 *busy = 1;
 736                                 return NULL;
 737                         }
 738                         mbox = (mbox_t *)scb->raw_mbox;
 739
 740                         memset(mbox, 0, sizeof(scb->raw_mbox));
 741                         mbox->m_out.logdrv = ldrv_num;
 742
 743                         /*
 744                          * A little hack: 2nd bit is zero for all scsi read
 745                          * commands and is set for all scsi write commands
 746                          */
 747                         if( adapter->has_64bit_addr ) {
 748                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 749                                         MEGA_MBOXCMD_LWRITE64:
 750                                         MEGA_MBOXCMD_LREAD64 ;
 751                         }
 752                         else {
 753                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 754                                         MEGA_MBOXCMD_LWRITE:
 755                                         MEGA_MBOXCMD_LREAD ;
 756                         }
 757
 758                         /*
 759                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
 760                          */
 761                         if( cmd->cmd_len == 6 ) {
 762                                 mbox->m_out.numsectors = (u32) cmd->cmnd[4];
 763                                 mbox->m_out.lba =
 764                                         ((u32)cmd->cmnd[1] << 16) |
 765                                         ((u32)cmd->cmnd[2] << 8) |
 766                                         (u32)cmd->cmnd[3];
 767
 768                                 mbox->m_out.lba &= 0x1FFFFF;
 769
 770 #if MEGA_HAVE_STATS
 771                                 /*
 772                                  * Take modulo 0x80, since the logical drive
 773                                  * number increases by 0x80 when a logical
 774                                  * drive was deleted
 775                                  */
 776                                 if (*cmd->cmnd == READ_6) {
 777                                         adapter->nreads[ldrv_num%0x80]++;
 778                                         adapter->nreadblocks[ldrv_num%0x80] +=
 779                                                 mbox->m_out.numsectors;
 780                                 } else {
 781                                         adapter->nwrites[ldrv_num%0x80]++;
 782                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 783                                                 mbox->m_out.numsectors;
 784                                 }
 785 #endif
 786                         }
 787
 788                         /*
 789                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
 790                          */
 791                         if( cmd->cmd_len == 10 ) {
 792                                 mbox->m_out.numsectors =
 793                                         (u32)cmd->cmnd[8] |
 794                                         ((u32)cmd->cmnd[7] << 8);
 795                                 mbox->m_out.lba =
 796                                         ((u32)cmd->cmnd[2] << 24) |
 797                                         ((u32)cmd->cmnd[3] << 16) |
 798                                         ((u32)cmd->cmnd[4] << 8) |
 799                                         (u32)cmd->cmnd[5];
 800
 801 #if MEGA_HAVE_STATS
 802                                 if (*cmd->cmnd == READ_10) {
 803                                         adapter->nreads[ldrv_num%0x80]++;
 804                                         adapter->nreadblocks[ldrv_num%0x80] +=
 805                                                 mbox->m_out.numsectors;
 806                                 } else {
 807                                         adapter->nwrites[ldrv_num%0x80]++;
 808                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 809                                                 mbox->m_out.numsectors;
 810                                 }
 811 #endif
 812                         }
 813
 814                         /*
 815                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
 816                          */
 817                         if( cmd->cmd_len == 12 ) {
 818                                 mbox->m_out.lba =
 819                                         ((u32)cmd->cmnd[2] << 24) |
 820                                         ((u32)cmd->cmnd[3] << 16) |
 821                                         ((u32)cmd->cmnd[4] << 8) |
 822                                         (u32)cmd->cmnd[5];
 823
 824                                 mbox->m_out.numsectors =
 825                                         ((u32)cmd->cmnd[6] << 24) |
 826                                         ((u32)cmd->cmnd[7] << 16) |
 827                                         ((u32)cmd->cmnd[8] << 8) |
 828                                         (u32)cmd->cmnd[9];
 829
 830 #if MEGA_HAVE_STATS
 831                                 if (*cmd->cmnd == READ_12) {
 832                                         adapter->nreads[ldrv_num%0x80]++;
 833                                         adapter->nreadblocks[ldrv_num%0x80] +=
 834                                                 mbox->m_out.numsectors;
 835                                 } else {
 836                                         adapter->nwrites[ldrv_num%0x80]++;
 837                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 838                                                 mbox->m_out.numsectors;
 839                                 }
 840 #endif
 841                         }
 842
 843                         /*
 844                          * If it is a read command
 845                          */
 846                         if( (*cmd->cmnd & 0x0F) == 0x08 ) {
 847                                 scb->dma_direction = DMA_FROM_DEVICE;
 848                         }
 849                         else {
 850                                 scb->dma_direction = DMA_TO_DEVICE;
 851                         }
 852
 853                         /* Calculate Scatter-Gather info */
 854                         mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
 855                                         (u32 *)&mbox->m_out.xferaddr, &seg);
 856
 857                         return scb;
 858
 859 #if MEGA_HAVE_CLUSTERING
 860                 case RESERVE:
 861                 case RELEASE:
 862
 863                         /*
 864                          * Do we support clustering and is the support enabled
 865                          */
 866                         if( ! adapter->has_cluster ) {
 867
 868                                 cmd->result = (DID_BAD_TARGET << 16);
 869                                 cmd->scsi_done(cmd);
 870                                 return NULL;
 871                         }
 872
 873                         /* Allocate a SCB and initialize mailbox */
 874                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 875                                 *busy = 1;
 876                                 return NULL;
 877                         }
 878
 879                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 880                         scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
 881                                 MEGA_RESERVE_LD : MEGA_RELEASE_LD;
 882
 883                         scb->raw_mbox[3] = ldrv_num;
 884
 885                         scb->dma_direction = DMA_NONE;
 886
 887                         return scb;
 888 #endif
 889
 890                 default:
 891                         cmd->result = (DID_BAD_TARGET << 16);
 892                         cmd->scsi_done(cmd);
 893                         return NULL;
 894                 }
 895         }
 896
 897         /*
 898          * Passthru drive commands
 899          */
 900         else {
 901                 /* Allocate a SCB and initialize passthru */
 902                 if(!(scb = mega_allocate_scb(adapter, cmd))) {
 903                         *busy = 1;
 904                         return NULL;
 905                 }
 906
 907                 mbox = (mbox_t *)scb->raw_mbox;
 908                 memset(mbox, 0, sizeof(scb->raw_mbox));
 909
 910                 if( adapter->support_ext_cdb ) {
 911
 912                         mega_prepare_extpassthru(adapter, scb, cmd,
 913                                         channel, target);
 914
 915                         mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;
 916
 917                         mbox->m_out.xferaddr = scb->epthru_dma_addr;
 918
 919                 }
 920                 else {
 921
 922                         pthru = mega_prepare_passthru(adapter, scb, cmd,
 923                                         channel, target);
 924
 925                         /* Initialize mailbox */
 926                         if( adapter->has_64bit_addr ) {
 927                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 928                         }
 929                         else {
 930                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 931                         }
 932
 933                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 934
 935                 }
 936                 return scb;
 937         }
 938         return NULL;
 939 }
 940
 941
 942 /**
 943  * mega_prepare_passthru()
 944  * @adapter: pointer to our soft state
 945  * @scb: our scsi control block
 946  * @cmd: scsi command from the mid-layer
 947  * @channel: actual channel on the controller
 948  * @target: actual id on the controller.
 949  *
 950  * prepare a command for the scsi physical devices.
 951  */
 952 static mega_passthru *
 953 mega_prepare_passthru(adapter_t *adapter, scb_t *scb, struct scsi_cmnd *cmd,
 954                       int channel, int target)
 955 {
 956         mega_passthru *pthru;
 957
 958         pthru = scb->pthru;
 959         memset(pthru, 0, sizeof (mega_passthru));
 960
 961         /* 0=6sec/1=60sec/2=10min/3=3hrs */
 962         pthru->timeout = 2;
 963
 964         pthru->ars = 1;
 965         pthru->reqsenselen = 14;
 966         pthru->islogical = 0;
 967
 968         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
 969
 970         pthru->target = (adapter->flag & BOARD_40LD) ?
 971                 (channel << 4) | target : target;
 972
 973         pthru->cdblen = cmd->cmd_len;
 974         pthru->logdrv = cmd->device->lun;
 975
 976         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 977
 978         /* Not sure about the direction */
 979         scb->dma_direction = DMA_BIDIRECTIONAL;
 980
 981         /* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
 982         switch (cmd->cmnd[0]) {
 983         case INQUIRY:
 984         case READ_CAPACITY:
 985                 if(!(adapter->flag & (1L << cmd->device->channel))) {
 986
 987                         dev_notice(&adapter->dev->dev,
 988                                 "scsi%d: scanning scsi channel %d [P%d] "
 989                                 "for physical devices\n",
 990                                         adapter->host->host_no,
 991                                         cmd->device->channel, channel);
 992
 993                         adapter->flag |= (1L << cmd->device->channel);
 994                 }
 995                 fallthrough;
 996         default:
 997                 pthru->numsgelements = mega_build_sglist(adapter, scb,
 998                                 &pthru->dataxferaddr, &pthru->dataxferlen);
 999                 break;
1000         }
1001         return pthru;
1002 }
1003
1004
1005 /**
1006  * mega_prepare_extpassthru()
1007  * @adapter: pointer to our soft state
1008  * @scb: our scsi control block
1009  * @cmd: scsi command from the mid-layer
1010  * @channel: actual channel on the controller
1011  * @target: actual id on the controller.
1012  *
1013  * prepare a command for the scsi physical devices. This rountine prepares
1014  * commands for devices which can take extended CDBs (>10 bytes)
1015  */
1016 static mega_ext_passthru *
1017 mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb,
1018                          struct scsi_cmnd *cmd,
1019                          int channel, int target)
1020 {
1021         mega_ext_passthru       *epthru;
1022
1023         epthru = scb->epthru;
1024         memset(epthru, 0, sizeof(mega_ext_passthru));
1025
1026         /* 0=6sec/1=60sec/2=10min/3=3hrs */
1027         epthru->timeout = 2;
1028
1029         epthru->ars = 1;
1030         epthru->reqsenselen = 14;
1031         epthru->islogical = 0;
1032
1033         epthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
1034         epthru->target = (adapter->flag & BOARD_40LD) ?
1035                 (channel << 4) | target : target;
1036
1037         epthru->cdblen = cmd->cmd_len;
1038         epthru->logdrv = cmd->device->lun;
1039
1040         memcpy(epthru->cdb, cmd->cmnd, cmd->cmd_len);
1041
1042         /* Not sure about the direction */
1043         scb->dma_direction = DMA_BIDIRECTIONAL;
1044
1045         switch(cmd->cmnd[0]) {
1046         case INQUIRY:
1047         case READ_CAPACITY:
1048                 if(!(adapter->flag & (1L << cmd->device->channel))) {
1049
1050                         dev_notice(&adapter->dev->dev,
1051                                 "scsi%d: scanning scsi channel %d [P%d] "
1052                                 "for physical devices\n",
1053                                         adapter->host->host_no,
1054                                         cmd->device->channel, channel);
1055
1056                         adapter->flag |= (1L << cmd->device->channel);
1057                 }
1058                 fallthrough;
1059         default:
1060                 epthru->numsgelements = mega_build_sglist(adapter, scb,
1061                                 &epthru->dataxferaddr, &epthru->dataxferlen);
1062                 break;
1063         }
1064
1065         return epthru;
1066 }
1067
1068 static void
1069 __mega_runpendq(adapter_t *adapter)
1070 {
1071         scb_t *scb;
1072         struct list_head *pos, *next;
1073
1074         /* Issue any pending commands to the card */
1075         list_for_each_safe(pos, next, &adapter->pending_list) {
1076
1077                 scb = list_entry(pos, scb_t, list);
1078
1079                 if( !(scb->state & SCB_ISSUED) ) {
1080
1081                         if( issue_scb(adapter, scb) != 0 )
1082                                 return;
1083                 }
1084         }
1085
1086         return;
1087 }
1088
1089
1090 /**
1091  * issue_scb()
1092  * @adapter: pointer to our soft state
1093  * @scb: scsi control block
1094  *
1095  * Post a command to the card if the mailbox is available, otherwise return
1096  * busy. We also take the scb from the pending list if the mailbox is
1097  * available.
1098  */
1099 static int
1100 issue_scb(adapter_t *adapter, scb_t *scb)
1101 {
1102         volatile mbox64_t       *mbox64 = adapter->mbox64;
1103         volatile mbox_t         *mbox = adapter->mbox;
1104         unsigned int    i = 0;
1105
1106         if(unlikely(mbox->m_in.busy)) {
1107                 do {
1108                         udelay(1);
1109                         i++;
1110                 } while( mbox->m_in.busy && (i < max_mbox_busy_wait) );
1111
1112                 if(mbox->m_in.busy) return -1;
1113         }
1114
1115         /* Copy mailbox data into host structure */
1116         memcpy((char *)&mbox->m_out, (char *)scb->raw_mbox,
1117                         sizeof(struct mbox_out));
1118
1119         mbox->m_out.cmdid = scb->idx;   /* Set cmdid */
1120         mbox->m_in.busy = 1;            /* Set busy */
1121
1122
1123         /*
1124          * Increment the pending queue counter
1125          */
1126         atomic_inc(&adapter->pend_cmds);
1127
1128         switch (mbox->m_out.cmd) {
1129         case MEGA_MBOXCMD_LREAD64:
1130         case MEGA_MBOXCMD_LWRITE64:
1131         case MEGA_MBOXCMD_PASSTHRU64:
1132         case MEGA_MBOXCMD_EXTPTHRU:
1133                 mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1134                 mbox64->xfer_segment_hi = 0;
1135                 mbox->m_out.xferaddr = 0xFFFFFFFF;
1136                 break;
1137         default:
1138                 mbox64->xfer_segment_lo = 0;
1139                 mbox64->xfer_segment_hi = 0;
1140         }
1141
1142         /*
1143          * post the command
1144          */
1145         scb->state |= SCB_ISSUED;
1146
1147         if( likely(adapter->flag & BOARD_MEMMAP) ) {
1148                 mbox->m_in.poll = 0;
1149                 mbox->m_in.ack = 0;
1150                 WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1151         }
1152         else {
1153                 irq_enable(adapter);
1154                 issue_command(adapter);
1155         }
1156
1157         return 0;
1158 }
1159
1160 /*
1161  * Wait until the controller's mailbox is available
1162  */
1163 static inline int
1164 mega_busywait_mbox (adapter_t *adapter)
1165 {
1166         if (adapter->mbox->m_in.busy)
1167                 return __mega_busywait_mbox(adapter);
1168         return 0;
1169 }
1170
1171 /**
1172  * issue_scb_block()
1173  * @adapter: pointer to our soft state
1174  * @raw_mbox: the mailbox
1175  *
1176  * Issue a scb in synchronous and non-interrupt mode
1177  */
1178 static int
1179 issue_scb_block(adapter_t *adapter, u_char *raw_mbox)
1180 {
1181         volatile mbox64_t *mbox64 = adapter->mbox64;
1182         volatile mbox_t *mbox = adapter->mbox;
1183         u8      byte;
1184
1185         /* Wait until mailbox is free */
1186         if(mega_busywait_mbox (adapter))
1187                 goto bug_blocked_mailbox;
1188
1189         /* Copy mailbox data into host structure */
1190         memcpy((char *) mbox, raw_mbox, sizeof(struct mbox_out));
1191         mbox->m_out.cmdid = 0xFE;
1192         mbox->m_in.busy = 1;
1193
1194         switch (raw_mbox[0]) {
1195         case MEGA_MBOXCMD_LREAD64:
1196         case MEGA_MBOXCMD_LWRITE64:
1197         case MEGA_MBOXCMD_PASSTHRU64:
1198         case MEGA_MBOXCMD_EXTPTHRU:
1199                 mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1200                 mbox64->xfer_segment_hi = 0;
1201                 mbox->m_out.xferaddr = 0xFFFFFFFF;
1202                 break;
1203         default:
1204                 mbox64->xfer_segment_lo = 0;
1205                 mbox64->xfer_segment_hi = 0;
1206         }
1207
1208         if( likely(adapter->flag & BOARD_MEMMAP) ) {
1209                 mbox->m_in.poll = 0;
1210                 mbox->m_in.ack = 0;
1211                 mbox->m_in.numstatus = 0xFF;
1212                 mbox->m_in.status = 0xFF;
1213                 WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1214
1215                 while((volatile u8)mbox->m_in.numstatus == 0xFF)
1216                         cpu_relax();
1217
1218                 mbox->m_in.numstatus = 0xFF;
1219
1220                 while( (volatile u8)mbox->m_in.poll != 0x77 )
1221                         cpu_relax();
1222
1223                 mbox->m_in.poll = 0;
1224                 mbox->m_in.ack = 0x77;
1225
1226                 WRINDOOR(adapter, adapter->mbox_dma | 0x2);
1227
1228                 while(RDINDOOR(adapter) & 0x2)
1229                         cpu_relax();
1230         }
1231         else {
1232                 irq_disable(adapter);
1233                 issue_command(adapter);
1234
1235                 while (!((byte = irq_state(adapter)) & INTR_VALID))
1236                         cpu_relax();
1237
1238                 set_irq_state(adapter, byte);
1239                 irq_enable(adapter);
1240                 irq_ack(adapter);
1241         }
1242
1243         return mbox->m_in.status;
1244
1245 bug_blocked_mailbox:
1246         dev_warn(&adapter->dev->dev, "Blocked mailbox......!!\n");
1247         udelay (1000);
1248         return -1;
1249 }
1250
1251
1252 /**
1253  * megaraid_isr_iomapped()
1254  * @irq: irq
1255  * @devp: pointer to our soft state
1256  *
1257  * Interrupt service routine for io-mapped controllers.
1258  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1259  * and service the completed commands.
1260  */
1261 static irqreturn_t
1262 megaraid_isr_iomapped(int irq, void *devp)
1263 {
1264         adapter_t       *adapter = devp;
1265         unsigned long   flags;
1266         u8      status;
1267         u8      nstatus;
1268         u8      completed[MAX_FIRMWARE_STATUS];
1269         u8      byte;
1270         int     handled = 0;
1271
1272
1273         /*
1274          * loop till F/W has more commands for us to complete.
1275          */
1276         spin_lock_irqsave(&adapter->lock, flags);
1277
1278         do {
1279                 /* Check if a valid interrupt is pending */
1280                 byte = irq_state(adapter);
1281                 if( (byte & VALID_INTR_BYTE) == 0 ) {
1282                         /*
1283                          * No more pending commands
1284                          */
1285                         goto out_unlock;
1286                 }
1287                 set_irq_state(adapter, byte);
1288
1289                 while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1290                                 == 0xFF)
1291                         cpu_relax();
1292                 adapter->mbox->m_in.numstatus = 0xFF;
1293
1294                 status = adapter->mbox->m_in.status;
1295
1296                 /*
1297                  * decrement the pending queue counter
1298                  */
1299                 atomic_sub(nstatus, &adapter->pend_cmds);
1300
1301                 memcpy(completed, (void *)adapter->mbox->m_in.completed,
1302                                 nstatus);
1303
1304                 /* Acknowledge interrupt */
1305                 irq_ack(adapter);
1306
1307                 mega_cmd_done(adapter, completed, nstatus, status);
1308
1309                 mega_rundoneq(adapter);
1310
1311                 handled = 1;
1312
1313                 /* Loop through any pending requests */
1314                 if(atomic_read(&adapter->quiescent) == 0) {
1315                         mega_runpendq(adapter);
1316                 }
1317
1318         } while(1);
1319
1320  out_unlock:
1321
1322         spin_unlock_irqrestore(&adapter->lock, flags);
1323
1324         return IRQ_RETVAL(handled);
1325 }
1326
1327
1328 /**
1329  * megaraid_isr_memmapped()
1330  * @irq: irq
1331  * @devp: pointer to our soft state
1332  *
1333  * Interrupt service routine for memory-mapped controllers.
1334  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1335  * and service the completed commands.
1336  */
1337 static irqreturn_t
1338 megaraid_isr_memmapped(int irq, void *devp)
1339 {
1340         adapter_t       *adapter = devp;
1341         unsigned long   flags;
1342         u8      status;
1343         u32     dword = 0;
1344         u8      nstatus;
1345         u8      completed[MAX_FIRMWARE_STATUS];
1346         int     handled = 0;
1347
1348
1349         /*
1350          * loop till F/W has more commands for us to complete.
1351          */
1352         spin_lock_irqsave(&adapter->lock, flags);
1353
1354         do {
1355                 /* Check if a valid interrupt is pending */
1356                 dword = RDOUTDOOR(adapter);
1357                 if(dword != 0x10001234) {
1358                         /*
1359                          * No more pending commands
1360                          */
1361                         goto out_unlock;
1362                 }
1363                 WROUTDOOR(adapter, 0x10001234);
1364
1365                 while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1366                                 == 0xFF) {
1367                         cpu_relax();
1368                 }
1369                 adapter->mbox->m_in.numstatus = 0xFF;
1370
1371                 status = adapter->mbox->m_in.status;
1372
1373                 /*
1374                  * decrement the pending queue counter
1375                  */
1376                 atomic_sub(nstatus, &adapter->pend_cmds);
1377
1378                 memcpy(completed, (void *)adapter->mbox->m_in.completed,
1379                                 nstatus);
1380
1381                 /* Acknowledge interrupt */
1382                 WRINDOOR(adapter, 0x2);
1383
1384                 handled = 1;
1385
1386                 while( RDINDOOR(adapter) & 0x02 )
1387                         cpu_relax();
1388
1389                 mega_cmd_done(adapter, completed, nstatus, status);
1390
1391                 mega_rundoneq(adapter);
1392
1393                 /* Loop through any pending requests */
1394                 if(atomic_read(&adapter->quiescent) == 0) {
1395                         mega_runpendq(adapter);
1396                 }
1397
1398         } while(1);
1399
1400  out_unlock:
1401
1402         spin_unlock_irqrestore(&adapter->lock, flags);
1403
1404         return IRQ_RETVAL(handled);
1405 }
1406 /**
1407  * mega_cmd_done()
1408  * @adapter: pointer to our soft state
1409  * @completed: array of ids of completed commands
1410  * @nstatus: number of completed commands
1411  * @status: status of the last command completed
1412  *
1413  * Complete the commands and call the scsi mid-layer callback hooks.
1414  */
1415 static void
1416 mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status)
1417 {
1418         mega_ext_passthru       *epthru = NULL;
1419         struct scatterlist      *sgl;
1420         struct scsi_cmnd        *cmd = NULL;
1421         mega_passthru   *pthru = NULL;
1422         mbox_t  *mbox = NULL;
1423         u8      c;
1424         scb_t   *scb;
1425         int     islogical;
1426         int     cmdid;
1427         int     i;
1428
1429         /*
1430          * for all the commands completed, call the mid-layer callback routine
1431          * and free the scb.
1432          */
1433         for( i = 0; i < nstatus; i++ ) {
1434
1435                 cmdid = completed[i];
1436
1437                 /*
1438                  * Only free SCBs for the commands coming down from the
1439                  * mid-layer, not for which were issued internally
1440                  *
1441                  * For internal command, restore the status returned by the
1442                  * firmware so that user can interpret it.
1443                  */
1444                 if (cmdid == CMDID_INT_CMDS) {
1445                         scb = &adapter->int_scb;
1446
1447                         list_del_init(&scb->list);
1448                         scb->state = SCB_FREE;
1449
1450                         adapter->int_status = status;
1451                         complete(&adapter->int_waitq);
1452                 } else {
1453                         scb = &adapter->scb_list[cmdid];
1454
1455                         /*
1456                          * Make sure f/w has completed a valid command
1457                          */
1458                         if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
1459                                 dev_crit(&adapter->dev->dev, "invalid command "
1460                                         "Id %d, scb->state:%x, scsi cmd:%p\n",
1461                                         cmdid, scb->state, scb->cmd);
1462
1463                                 continue;
1464                         }
1465
1466                         /*
1467                          * Was a abort issued for this command
1468                          */
1469                         if( scb->state & SCB_ABORT ) {
1470
1471                                 dev_warn(&adapter->dev->dev,
1472                                         "aborted cmd [%x] complete\n",
1473                                         scb->idx);
1474
1475                                 scb->cmd->result = (DID_ABORT << 16);
1476
1477                                 list_add_tail(SCSI_LIST(scb->cmd),
1478                                                 &adapter->completed_list);
1479
1480                                 mega_free_scb(adapter, scb);
1481
1482                                 continue;
1483                         }
1484
1485                         /*
1486                          * Was a reset issued for this command
1487                          */
1488                         if( scb->state & SCB_RESET ) {
1489
1490                                 dev_warn(&adapter->dev->dev,
1491                                         "reset cmd [%x] complete\n",
1492                                         scb->idx);
1493
1494                                 scb->cmd->result = (DID_RESET << 16);
1495
1496                                 list_add_tail(SCSI_LIST(scb->cmd),
1497                                                 &adapter->completed_list);
1498
1499                                 mega_free_scb (adapter, scb);
1500
1501                                 continue;
1502                         }
1503
1504                         cmd = scb->cmd;
1505                         pthru = scb->pthru;
1506                         epthru = scb->epthru;
1507                         mbox = (mbox_t *)scb->raw_mbox;
1508
1509 #if MEGA_HAVE_STATS
1510                         {
1511
1512                         int     logdrv = mbox->m_out.logdrv;
1513
1514                         islogical = adapter->logdrv_chan[cmd->channel];
1515                         /*
1516                          * Maintain an error counter for the logical drive.
1517                          * Some application like SNMP agent need such
1518                          * statistics
1519                          */
1520                         if( status && islogical && (cmd->cmnd[0] == READ_6 ||
1521                                                 cmd->cmnd[0] == READ_10 ||
1522                                                 cmd->cmnd[0] == READ_12)) {
1523                                 /*
1524                                  * Logical drive number increases by 0x80 when
1525                                  * a logical drive is deleted
1526                                  */
1527                                 adapter->rd_errors[logdrv%0x80]++;
1528                         }
1529
1530                         if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
1531                                                 cmd->cmnd[0] == WRITE_10 ||
1532                                                 cmd->cmnd[0] == WRITE_12)) {
1533                                 /*
1534                                  * Logical drive number increases by 0x80 when
1535                                  * a logical drive is deleted
1536                                  */
1537                                 adapter->wr_errors[logdrv%0x80]++;
1538                         }
1539
1540                         }
1541 #endif
1542                 }
1543
1544                 /*
1545                  * Do not return the presence of hard disk on the channel so,
1546                  * inquiry sent, and returned data==hard disk or removable
1547                  * hard disk and not logical, request should return failure! -
1548                  * PJ
1549                  */
1550                 islogical = adapter->logdrv_chan[cmd->device->channel];
1551                 if( cmd->cmnd[0] == INQUIRY && !islogical ) {
1552
1553                         sgl = scsi_sglist(cmd);
1554                         if( sg_page(sgl) ) {
1555                                 c = *(unsigned char *) sg_virt(&sgl[0]);
1556                         } else {
1557                                 dev_warn(&adapter->dev->dev, "invalid sg\n");
1558                                 c = 0;
1559                         }
1560
1561                         if(IS_RAID_CH(adapter, cmd->device->channel) &&
1562                                         ((c & 0x1F ) == TYPE_DISK)) {
1563                                 status = 0xF0;
1564                         }
1565                 }
1566
1567                 /* clear result; otherwise, success returns corrupt value */
1568                 cmd->result = 0;
1569
1570                 /* Convert MegaRAID status to Linux error code */
1571                 switch (status) {
1572                 case 0x00:      /* SUCCESS , i.e. SCSI_STATUS_GOOD */
1573                         cmd->result |= (DID_OK << 16);
1574                         break;
1575
1576                 case 0x02:      /* ERROR_ABORTED, i.e.
1577                                    SCSI_STATUS_CHECK_CONDITION */
1578
1579                         /* set sense_buffer and result fields */
1580                         if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
1581                                 mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
1582
1583                                 memcpy(cmd->sense_buffer, pthru->reqsensearea,
1584                                                 14);
1585
1586                                 cmd->result = SAM_STAT_CHECK_CONDITION;
1587                         }
1588                         else {
1589                                 if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
1590
1591                                         memcpy(cmd->sense_buffer,
1592                                                 epthru->reqsensearea, 14);
1593
1594                                         cmd->result = SAM_STAT_CHECK_CONDITION;
1595                                 } else
1596                                         scsi_build_sense(cmd, 0,
1597                                                          ABORTED_COMMAND, 0, 0);
1598                         }
1599                         break;
1600
1601                 case 0x08:      /* ERR_DEST_DRIVE_FAILED, i.e.
1602                                    SCSI_STATUS_BUSY */
1603                         cmd->result |= (DID_BUS_BUSY << 16) | status;
1604                         break;
1605
1606                 default:
1607 #if MEGA_HAVE_CLUSTERING
1608                         /*
1609                          * If TEST_UNIT_READY fails, we know
1610                          * MEGA_RESERVATION_STATUS failed
1611                          */
1612                         if( cmd->cmnd[0] == TEST_UNIT_READY ) {
1613                                 cmd->result |= (DID_ERROR << 16) |
1614                                         SAM_STAT_RESERVATION_CONFLICT;
1615                         }
1616                         else
1617                         /*
1618                          * Error code returned is 1 if Reserve or Release
1619                          * failed or the input parameter is invalid
1620                          */
1621                         if( status == 1 &&
1622                                 (cmd->cmnd[0] == RESERVE ||
1623                                          cmd->cmnd[0] == RELEASE) ) {
1624
1625                                 cmd->result |= (DID_ERROR << 16) |
1626                                         SAM_STAT_RESERVATION_CONFLICT;
1627                         }
1628                         else
1629 #endif
1630                                 cmd->result |= (DID_BAD_TARGET << 16)|status;
1631                 }
1632
1633                 mega_free_scb(adapter, scb);
1634
1635                 /* Add Scsi_Command to end of completed queue */
1636                 list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
1637         }
1638 }
1639
1640
1641 /*
1642  * mega_runpendq()
1643  *
1644  * Run through the list of completed requests and finish it
1645  */
1646 static void
1647 mega_rundoneq (adapter_t *adapter)
1648 {
1649         struct scsi_cmnd *cmd;
1650         struct list_head *pos;
1651
1652         list_for_each(pos, &adapter->completed_list) {
1653
1654                 struct scsi_pointer* spos = (struct scsi_pointer *)pos;
1655
1656                 cmd = list_entry(spos, struct scsi_cmnd, SCp);
1657                 cmd->scsi_done(cmd);
1658         }
1659
1660         INIT_LIST_HEAD(&adapter->completed_list);
1661 }
1662
1663
1664 /*
1665  * Free a SCB structure
1666  * Note: We assume the scsi commands associated with this scb is not free yet.
1667  */
1668 static void
1669 mega_free_scb(adapter_t *adapter, scb_t *scb)
1670 {
1671         switch( scb->dma_type ) {
1672
1673         case MEGA_DMA_TYPE_NONE:
1674                 break;
1675
1676         case MEGA_SGLIST:
1677                 scsi_dma_unmap(scb->cmd);
1678                 break;
1679         default:
1680                 break;
1681         }
1682
1683         /*
1684          * Remove from the pending list
1685          */
1686         list_del_init(&scb->list);
1687
1688         /* Link the scb back into free list */
1689         scb->state = SCB_FREE;
1690         scb->cmd = NULL;
1691
1692         list_add(&scb->list, &adapter->free_list);
1693 }
1694
1695
1696 static int
1697 __mega_busywait_mbox (adapter_t *adapter)
1698 {
1699         volatile mbox_t *mbox = adapter->mbox;
1700         long counter;
1701
1702         for (counter = 0; counter < 10000; counter++) {
1703                 if (!mbox->m_in.busy)
1704                         return 0;
1705                 udelay(100);
1706                 cond_resched();
1707         }
1708         return -1;              /* give up after 1 second */
1709 }
1710
1711 /*
1712  * Copies data to SGLIST
1713  * Note: For 64 bit cards, we need a minimum of one SG element for read/write
1714  */
1715 static int
1716 mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
1717 {
1718         struct scatterlist *sg;
1719         struct scsi_cmnd        *cmd;
1720         int     sgcnt;
1721         int     idx;
1722
1723         cmd = scb->cmd;
1724
1725         /*
1726          * Copy Scatter-Gather list info into controller structure.
1727          *
1728          * The number of sg elements returned must not exceed our limit
1729          */
1730         sgcnt = scsi_dma_map(cmd);
1731
1732         scb->dma_type = MEGA_SGLIST;
1733
1734         BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);
1735
1736         *len = 0;
1737
1738         if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
1739                 sg = scsi_sglist(cmd);
1740                 scb->dma_h_bulkdata = sg_dma_address(sg);
1741                 *buf = (u32)scb->dma_h_bulkdata;
1742                 *len = sg_dma_len(sg);
1743                 return 0;
1744         }
1745
1746         scsi_for_each_sg(cmd, sg, sgcnt, idx) {
1747                 if (adapter->has_64bit_addr) {
1748                         scb->sgl64[idx].address = sg_dma_address(sg);
1749                         *len += scb->sgl64[idx].length = sg_dma_len(sg);
1750                 } else {
1751                         scb->sgl[idx].address = sg_dma_address(sg);
1752                         *len += scb->sgl[idx].length = sg_dma_len(sg);
1753                 }
1754         }
1755
1756         /* Reset pointer and length fields */
1757         *buf = scb->sgl_dma_addr;
1758
1759         /* Return count of SG requests */
1760         return sgcnt;
1761 }
1762
1763
1764 /*
1765  * mega_8_to_40ld()
1766  *
1767  * takes all info in AdapterInquiry structure and puts it into ProductInfo and
1768  * Enquiry3 structures for later use
1769  */
1770 static void
1771 mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
1772                 mega_product_info *product_info)
1773 {
1774         int i;
1775
1776         product_info->max_commands = inquiry->adapter_info.max_commands;
1777         enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
1778         product_info->nchannels = inquiry->adapter_info.nchannels;
1779
1780         for (i = 0; i < 4; i++) {
1781                 product_info->fw_version[i] =
1782                         inquiry->adapter_info.fw_version[i];
1783
1784                 product_info->bios_version[i] =
1785                         inquiry->adapter_info.bios_version[i];
1786         }
1787         enquiry3->cache_flush_interval =
1788                 inquiry->adapter_info.cache_flush_interval;
1789
1790         product_info->dram_size = inquiry->adapter_info.dram_size;
1791
1792         enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
1793
1794         for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
1795                 enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
1796                 enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
1797                 enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
1798         }
1799
1800         for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
1801                 enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
1802 }
1803
1804 static inline void
1805 mega_free_sgl(adapter_t *adapter)
1806 {
1807         scb_t   *scb;
1808         int     i;
1809
1810         for(i = 0; i < adapter->max_cmds; i++) {
1811
1812                 scb = &adapter->scb_list[i];
1813
1814                 if( scb->sgl64 ) {
1815                         dma_free_coherent(&adapter->dev->dev,
1816                                           sizeof(mega_sgl64) * adapter->sglen,
1817                                           scb->sgl64, scb->sgl_dma_addr);
1818
1819                         scb->sgl64 = NULL;
1820                 }
1821
1822                 if( scb->pthru ) {
1823                         dma_free_coherent(&adapter->dev->dev,
1824                                           sizeof(mega_passthru), scb->pthru,
1825                                           scb->pthru_dma_addr);
1826
1827                         scb->pthru = NULL;
1828                 }
1829
1830                 if( scb->epthru ) {
1831                         dma_free_coherent(&adapter->dev->dev,
1832                                           sizeof(mega_ext_passthru),
1833                                           scb->epthru, scb->epthru_dma_addr);
1834
1835                         scb->epthru = NULL;
1836                 }
1837
1838         }
1839 }
1840
1841
1842 /*
1843  * Get information about the card/driver
1844  */
1845 const char *
1846 megaraid_info(struct Scsi_Host *host)
1847 {
1848         static char buffer[512];
1849         adapter_t *adapter;
1850
1851         adapter = (adapter_t *)host->hostdata;
1852
1853         sprintf (buffer,
1854                  "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
1855                  adapter->fw_version, adapter->product_info.max_commands,
1856                  adapter->host->max_id, adapter->host->max_channel,
1857                  (u32)adapter->host->max_lun);
1858         return buffer;
1859 }
1860
1861 /*
1862  * Abort a previous SCSI request. Only commands on the pending list can be
1863  * aborted. All the commands issued to the F/W must complete.
1864  */
1865 static int
1866 megaraid_abort(struct scsi_cmnd *cmd)
1867 {
1868         adapter_t       *adapter;
1869         int             rval;
1870
1871         adapter = (adapter_t *)cmd->device->host->hostdata;
1872
1873         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
1874
1875         /*
1876          * This is required here to complete any completed requests
1877          * to be communicated over to the mid layer.
1878          */
1879         mega_rundoneq(adapter);
1880
1881         return rval;
1882 }
1883
1884
1885 static int
1886 megaraid_reset(struct scsi_cmnd *cmd)
1887 {
1888         adapter_t       *adapter;
1889         megacmd_t       mc;
1890         int             rval;
1891
1892         adapter = (adapter_t *)cmd->device->host->hostdata;
1893
1894 #if MEGA_HAVE_CLUSTERING
1895         mc.cmd = MEGA_CLUSTER_CMD;
1896         mc.opcode = MEGA_RESET_RESERVATIONS;
1897
1898         if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
1899                 dev_warn(&adapter->dev->dev, "reservation reset failed\n");
1900         }
1901         else {
1902                 dev_info(&adapter->dev->dev, "reservation reset\n");
1903         }
1904 #endif
1905
1906         spin_lock_irq(&adapter->lock);
1907
1908         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
1909
1910         /*
1911          * This is required here to complete any completed requests
1912          * to be communicated over to the mid layer.
1913          */
1914         mega_rundoneq(adapter);
1915         spin_unlock_irq(&adapter->lock);
1916
1917         return rval;
1918 }
1919
1920 /**
1921  * megaraid_abort_and_reset()
1922  * @adapter: megaraid soft state
1923  * @cmd: scsi command to be aborted or reset
1924  * @aor: abort or reset flag
1925  *
1926  * Try to locate the scsi command in the pending queue. If found and is not
1927  * issued to the controller, abort/reset it. Otherwise return failure
1928  */
1929 static int
1930 megaraid_abort_and_reset(adapter_t *adapter, struct scsi_cmnd *cmd, int aor)
1931 {
1932         struct list_head        *pos, *next;
1933         scb_t                   *scb;
1934
1935         dev_warn(&adapter->dev->dev, "%s cmd=%x <c=%d t=%d l=%d>\n",
1936              (aor == SCB_ABORT)? "ABORTING":"RESET",
1937              cmd->cmnd[0], cmd->device->channel,
1938              cmd->device->id, (u32)cmd->device->lun);
1939
1940         if(list_empty(&adapter->pending_list))
1941                 return FAILED;
1942
1943         list_for_each_safe(pos, next, &adapter->pending_list) {
1944
1945                 scb = list_entry(pos, scb_t, list);
1946
1947                 if (scb->cmd == cmd) { /* Found command */
1948
1949                         scb->state |= aor;
1950
1951                         /*
1952                          * Check if this command has firmware ownership. If
1953                          * yes, we cannot reset this command. Whenever f/w
1954                          * completes this command, we will return appropriate
1955                          * status from ISR.
1956                          */
1957                         if( scb->state & SCB_ISSUED ) {
1958
1959                                 dev_warn(&adapter->dev->dev,
1960                                         "%s[%x], fw owner\n",
1961                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1962                                         scb->idx);
1963
1964                                 return FAILED;
1965                         }
1966                         else {
1967
1968                                 /*
1969                                  * Not yet issued! Remove from the pending
1970                                  * list
1971                                  */
1972                                 dev_warn(&adapter->dev->dev,
1973                                         "%s-[%x], driver owner\n",
1974                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1975                                         scb->idx);
1976
1977                                 mega_free_scb(adapter, scb);
1978
1979                                 if( aor == SCB_ABORT ) {
1980                                         cmd->result = (DID_ABORT << 16);
1981                                 }
1982                                 else {
1983                                         cmd->result = (DID_RESET << 16);
1984                                 }
1985
1986                                 list_add_tail(SCSI_LIST(cmd),
1987                                                 &adapter->completed_list);
1988
1989                                 return SUCCESS;
1990                         }
1991                 }
1992         }
1993
1994         return FAILED;
1995 }
1996
1997 static inline int
1998 make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
1999 {
2000         *pdev = pci_alloc_dev(NULL);
2001
2002         if( *pdev == NULL ) return -1;
2003
2004         memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
2005
2006         if (dma_set_mask(&(*pdev)->dev, DMA_BIT_MASK(32)) != 0) {
2007                 kfree(*pdev);
2008                 return -1;
2009         }
2010
2011         return 0;
2012 }
2013
2014 static inline void
2015 free_local_pdev(struct pci_dev *pdev)
2016 {
2017         kfree(pdev);
2018 }
2019
2020 /**
2021  * mega_allocate_inquiry()
2022  * @dma_handle: handle returned for dma address
2023  * @pdev: handle to pci device
2024  *
2025  * allocates memory for inquiry structure
2026  */
2027 static inline void *
2028 mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
2029 {
2030         return dma_alloc_coherent(&pdev->dev, sizeof(mega_inquiry3),
2031                                   dma_handle, GFP_KERNEL);
2032 }
2033
2034
2035 static inline void
2036 mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
2037 {
2038         dma_free_coherent(&pdev->dev, sizeof(mega_inquiry3), inquiry,
2039                           dma_handle);
2040 }
2041
2042
2043 #ifdef CONFIG_PROC_FS
2044 /* Following code handles /proc fs  */
2045
2046 /**
2047  * proc_show_config()
2048  * @m: Synthetic file construction data
2049  * @v: File iterator
2050  *
2051  * Display configuration information about the controller.
2052  */
2053 static int
2054 proc_show_config(struct seq_file *m, void *v)
2055 {
2056
2057         adapter_t *adapter = m->private;
2058
2059         seq_puts(m, MEGARAID_VERSION);
2060         if(adapter->product_info.product_name[0])
2061                 seq_printf(m, "%s\n", adapter->product_info.product_name);
2062
2063         seq_puts(m, "Controller Type: ");
2064
2065         if( adapter->flag & BOARD_MEMMAP )
2066                 seq_puts(m, "438/466/467/471/493/518/520/531/532\n");
2067         else
2068                 seq_puts(m, "418/428/434\n");
2069
2070         if(adapter->flag & BOARD_40LD)
2071                 seq_puts(m, "Controller Supports 40 Logical Drives\n");
2072
2073         if(adapter->flag & BOARD_64BIT)
2074                 seq_puts(m, "Controller capable of 64-bit memory addressing\n");
2075         if( adapter->has_64bit_addr )
2076                 seq_puts(m, "Controller using 64-bit memory addressing\n");
2077         else
2078                 seq_puts(m, "Controller is not using 64-bit memory addressing\n");
2079
2080         seq_printf(m, "Base = %08lx, Irq = %d, ",
2081                    adapter->base, adapter->host->irq);
2082
2083         seq_printf(m, "Logical Drives = %d, Channels = %d\n",
2084                    adapter->numldrv, adapter->product_info.nchannels);
2085
2086         seq_printf(m, "Version =%s:%s, DRAM = %dMb\n",
2087                    adapter->fw_version, adapter->bios_version,
2088                    adapter->product_info.dram_size);
2089
2090         seq_printf(m, "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
2091                    adapter->product_info.max_commands, adapter->max_cmds);
2092
2093         seq_printf(m, "support_ext_cdb    = %d\n", adapter->support_ext_cdb);
2094         seq_printf(m, "support_random_del = %d\n", adapter->support_random_del);
2095         seq_printf(m, "boot_ldrv_enabled  = %d\n", adapter->boot_ldrv_enabled);
2096         seq_printf(m, "boot_ldrv          = %d\n", adapter->boot_ldrv);
2097         seq_printf(m, "boot_pdrv_enabled  = %d\n", adapter->boot_pdrv_enabled);
2098         seq_printf(m, "boot_pdrv_ch       = %d\n", adapter->boot_pdrv_ch);
2099         seq_printf(m, "boot_pdrv_tgt      = %d\n", adapter->boot_pdrv_tgt);
2100         seq_printf(m, "quiescent          = %d\n",
2101                    atomic_read(&adapter->quiescent));
2102         seq_printf(m, "has_cluster        = %d\n", adapter->has_cluster);
2103
2104         seq_puts(m, "\nModule Parameters:\n");
2105         seq_printf(m, "max_cmd_per_lun    = %d\n", max_cmd_per_lun);
2106         seq_printf(m, "max_sectors_per_io = %d\n", max_sectors_per_io);
2107         return 0;
2108 }
2109
2110 /**
2111  * proc_show_stat()
2112  * @m: Synthetic file construction data
2113  * @v: File iterator
2114  *
2115  * Display statistical information about the I/O activity.
2116  */
2117 static int
2118 proc_show_stat(struct seq_file *m, void *v)
2119 {
2120         adapter_t *adapter = m->private;
2121 #if MEGA_HAVE_STATS
2122         int     i;
2123 #endif
2124
2125         seq_puts(m, "Statistical Information for this controller\n");
2126         seq_printf(m, "pend_cmds = %d\n", atomic_read(&adapter->pend_cmds));
2127 #if MEGA_HAVE_STATS
2128         for(i = 0; i < adapter->numldrv; i++) {
2129                 seq_printf(m, "Logical Drive %d:\n", i);
2130                 seq_printf(m, "\tReads Issued = %lu, Writes Issued = %lu\n",
2131                            adapter->nreads[i], adapter->nwrites[i]);
2132                 seq_printf(m, "\tSectors Read = %lu, Sectors Written = %lu\n",
2133                            adapter->nreadblocks[i], adapter->nwriteblocks[i]);
2134                 seq_printf(m, "\tRead errors = %lu, Write errors = %lu\n\n",
2135                            adapter->rd_errors[i], adapter->wr_errors[i]);
2136         }
2137 #else
2138         seq_puts(m, "IO and error counters not compiled in driver.\n");
2139 #endif
2140         return 0;
2141 }
2142
2143
2144 /**
2145  * proc_show_mbox()
2146  * @m: Synthetic file construction data
2147  * @v: File iterator
2148  *
2149  * Display mailbox information for the last command issued. This information
2150  * is good for debugging.
2151  */
2152 static int
2153 proc_show_mbox(struct seq_file *m, void *v)
2154 {
2155         adapter_t       *adapter = m->private;
2156         volatile mbox_t *mbox = adapter->mbox;
2157
2158         seq_puts(m, "Contents of Mail Box Structure\n");
2159         seq_printf(m, "  Fw Command   = 0x%02x\n", mbox->m_out.cmd);
2160         seq_printf(m, "  Cmd Sequence = 0x%02x\n", mbox->m_out.cmdid);
2161         seq_printf(m, "  No of Sectors= %04d\n", mbox->m_out.numsectors);
2162         seq_printf(m, "  LBA          = 0x%02x\n", mbox->m_out.lba);
2163         seq_printf(m, "  DTA          = 0x%08x\n", mbox->m_out.xferaddr);
2164         seq_printf(m, "  Logical Drive= 0x%02x\n", mbox->m_out.logdrv);
2165         seq_printf(m, "  No of SG Elmt= 0x%02x\n", mbox->m_out.numsgelements);
2166         seq_printf(m, "  Busy         = %01x\n", mbox->m_in.busy);
2167         seq_printf(m, "  Status       = 0x%02x\n", mbox->m_in.status);
2168         return 0;
2169 }
2170
2171
2172 /**
2173  * proc_show_rebuild_rate()
2174  * @m: Synthetic file construction data
2175  * @v: File iterator
2176  *
2177  * Display current rebuild rate
2178  */
2179 static int
2180 proc_show_rebuild_rate(struct seq_file *m, void *v)
2181 {
2182         adapter_t       *adapter = m->private;
2183         dma_addr_t      dma_handle;
2184         caddr_t         inquiry;
2185         struct pci_dev  *pdev;
2186
2187         if( make_local_pdev(adapter, &pdev) != 0 )
2188                 return 0;
2189
2190         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2191                 goto free_pdev;
2192
2193         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2194                 seq_puts(m, "Adapter inquiry failed.\n");
2195                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2196                 goto free_inquiry;
2197         }
2198
2199         if( adapter->flag & BOARD_40LD )
2200                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2201                            ((mega_inquiry3 *)inquiry)->rebuild_rate);
2202         else
2203                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2204                         ((mraid_ext_inquiry *)
2205                          inquiry)->raid_inq.adapter_info.rebuild_rate);
2206
2207 free_inquiry:
2208         mega_free_inquiry(inquiry, dma_handle, pdev);
2209 free_pdev:
2210         free_local_pdev(pdev);
2211         return 0;
2212 }
2213
2214
2215 /**
2216  * proc_show_battery()
2217  * @m: Synthetic file construction data
2218  * @v: File iterator
2219  *
2220  * Display information about the battery module on the controller.
2221  */
2222 static int
2223 proc_show_battery(struct seq_file *m, void *v)
2224 {
2225         adapter_t       *adapter = m->private;
2226         dma_addr_t      dma_handle;
2227         caddr_t         inquiry;
2228         struct pci_dev  *pdev;
2229         u8      battery_status;
2230
2231         if( make_local_pdev(adapter, &pdev) != 0 )
2232                 return 0;
2233
2234         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2235                 goto free_pdev;
2236
2237         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2238                 seq_puts(m, "Adapter inquiry failed.\n");
2239                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2240                 goto free_inquiry;
2241         }
2242
2243         if( adapter->flag & BOARD_40LD ) {
2244                 battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
2245         }
2246         else {
2247                 battery_status = ((mraid_ext_inquiry *)inquiry)->
2248                         raid_inq.adapter_info.battery_status;
2249         }
2250
2251         /*
2252          * Decode the battery status
2253          */
2254         seq_printf(m, "Battery Status:[%d]", battery_status);
2255
2256         if(battery_status == MEGA_BATT_CHARGE_DONE)
2257                 seq_puts(m, " Charge Done");
2258
2259         if(battery_status & MEGA_BATT_MODULE_MISSING)
2260                 seq_puts(m, " Module Missing");
2261
2262         if(battery_status & MEGA_BATT_LOW_VOLTAGE)
2263                 seq_puts(m, " Low Voltage");
2264
2265         if(battery_status & MEGA_BATT_TEMP_HIGH)
2266                 seq_puts(m, " Temperature High");
2267
2268         if(battery_status & MEGA_BATT_PACK_MISSING)
2269                 seq_puts(m, " Pack Missing");
2270
2271         if(battery_status & MEGA_BATT_CHARGE_INPROG)
2272                 seq_puts(m, " Charge In-progress");
2273
2274         if(battery_status & MEGA_BATT_CHARGE_FAIL)
2275                 seq_puts(m, " Charge Fail");
2276
2277         if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
2278                 seq_puts(m, " Cycles Exceeded");
2279
2280         seq_putc(m, '\n');
2281
2282 free_inquiry:
2283         mega_free_inquiry(inquiry, dma_handle, pdev);
2284 free_pdev:
2285         free_local_pdev(pdev);
2286         return 0;
2287 }
2288
2289
2290 /*
2291  * Display scsi inquiry
2292  */
2293 static void
2294 mega_print_inquiry(struct seq_file *m, char *scsi_inq)
2295 {
2296         int     i;
2297
2298         seq_puts(m, "  Vendor: ");
2299         seq_write(m, scsi_inq + 8, 8);
2300         seq_puts(m, "  Model: ");
2301         seq_write(m, scsi_inq + 16, 16);
2302         seq_puts(m, "  Rev: ");
2303         seq_write(m, scsi_inq + 32, 4);
2304         seq_putc(m, '\n');
2305
2306         i = scsi_inq[0] & 0x1f;
2307         seq_printf(m, "  Type:   %s ", scsi_device_type(i));
2308
2309         seq_printf(m, "                 ANSI SCSI revision: %02x",
2310                    scsi_inq[2] & 0x07);
2311
2312         if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
2313                 seq_puts(m, " CCS\n");
2314         else
2315                 seq_putc(m, '\n');
2316 }
2317
2318 /**
2319  * proc_show_pdrv()
2320  * @m: Synthetic file construction data
2321  * @adapter: pointer to our soft state
2322  * @channel: channel
2323  *
2324  * Display information about the physical drives.
2325  */
2326 static int
2327 proc_show_pdrv(struct seq_file *m, adapter_t *adapter, int channel)
2328 {
2329         dma_addr_t      dma_handle;
2330         char            *scsi_inq;
2331         dma_addr_t      scsi_inq_dma_handle;
2332         caddr_t         inquiry;
2333         struct pci_dev  *pdev;
2334         u8      *pdrv_state;
2335         u8      state;
2336         int     tgt;
2337         int     max_channels;
2338         int     i;
2339
2340         if( make_local_pdev(adapter, &pdev) != 0 )
2341                 return 0;
2342
2343         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2344                 goto free_pdev;
2345
2346         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2347                 seq_puts(m, "Adapter inquiry failed.\n");
2348                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2349                 goto free_inquiry;
2350         }
2351
2352
2353         scsi_inq = dma_alloc_coherent(&pdev->dev, 256, &scsi_inq_dma_handle,
2354                                       GFP_KERNEL);
2355         if( scsi_inq == NULL ) {
2356                 seq_puts(m, "memory not available for scsi inq.\n");
2357                 goto free_inquiry;
2358         }
2359
2360         if( adapter->flag & BOARD_40LD ) {
2361                 pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
2362         }
2363         else {
2364                 pdrv_state = ((mraid_ext_inquiry *)inquiry)->
2365                         raid_inq.pdrv_info.pdrv_state;
2366         }
2367
2368         max_channels = adapter->product_info.nchannels;
2369
2370         if( channel >= max_channels ) {
2371                 goto free_pci;
2372         }
2373
2374         for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
2375
2376                 i = channel*16 + tgt;
2377
2378                 state = *(pdrv_state + i);
2379                 switch( state & 0x0F ) {
2380                 case PDRV_ONLINE:
2381                         seq_printf(m, "Channel:%2d Id:%2d State: Online",
2382                                    channel, tgt);
2383                         break;
2384
2385                 case PDRV_FAILED:
2386                         seq_printf(m, "Channel:%2d Id:%2d State: Failed",
2387                                    channel, tgt);
2388                         break;
2389
2390                 case PDRV_RBLD:
2391                         seq_printf(m, "Channel:%2d Id:%2d State: Rebuild",
2392                                    channel, tgt);
2393                         break;
2394
2395                 case PDRV_HOTSPARE:
2396                         seq_printf(m, "Channel:%2d Id:%2d State: Hot spare",
2397                                    channel, tgt);
2398                         break;
2399
2400                 default:
2401                         seq_printf(m, "Channel:%2d Id:%2d State: Un-configured",
2402                                    channel, tgt);
2403                         break;
2404                 }
2405
2406                 /*
2407                  * This interface displays inquiries for disk drives
2408                  * only. Inquries for logical drives and non-disk
2409                  * devices are available through /proc/scsi/scsi
2410                  */
2411                 memset(scsi_inq, 0, 256);
2412                 if( mega_internal_dev_inquiry(adapter, channel, tgt,
2413                                 scsi_inq_dma_handle) ||
2414                                 (scsi_inq[0] & 0x1F) != TYPE_DISK ) {
2415                         continue;
2416                 }
2417
2418                 /*
2419                  * Check for overflow. We print less than 240
2420                  * characters for inquiry
2421                  */
2422                 seq_puts(m, ".\n");
2423                 mega_print_inquiry(m, scsi_inq);
2424         }
2425
2426 free_pci:
2427         dma_free_coherent(&pdev->dev, 256, scsi_inq, scsi_inq_dma_handle);
2428 free_inquiry:
2429         mega_free_inquiry(inquiry, dma_handle, pdev);
2430 free_pdev:
2431         free_local_pdev(pdev);
2432         return 0;
2433 }
2434
2435 /**
2436  * proc_show_pdrv_ch0()
2437  * @m: Synthetic file construction data
2438  * @v: File iterator
2439  *
2440  * Display information about the physical drives on physical channel 0.
2441  */
2442 static int
2443 proc_show_pdrv_ch0(struct seq_file *m, void *v)
2444 {
2445         return proc_show_pdrv(m, m->private, 0);
2446 }
2447
2448
2449 /**
2450  * proc_show_pdrv_ch1()
2451  * @m: Synthetic file construction data
2452  * @v: File iterator
2453  *
2454  * Display information about the physical drives on physical channel 1.
2455  */
2456 static int
2457 proc_show_pdrv_ch1(struct seq_file *m, void *v)
2458 {
2459         return proc_show_pdrv(m, m->private, 1);
2460 }
2461
2462
2463 /**
2464  * proc_show_pdrv_ch2()
2465  * @m: Synthetic file construction data
2466  * @v: File iterator
2467  *
2468  * Display information about the physical drives on physical channel 2.
2469  */
2470 static int
2471 proc_show_pdrv_ch2(struct seq_file *m, void *v)
2472 {
2473         return proc_show_pdrv(m, m->private, 2);
2474 }
2475
2476
2477 /**
2478  * proc_show_pdrv_ch3()
2479  * @m: Synthetic file construction data
2480  * @v: File iterator
2481  *
2482  * Display information about the physical drives on physical channel 3.
2483  */
2484 static int
2485 proc_show_pdrv_ch3(struct seq_file *m, void *v)
2486 {
2487         return proc_show_pdrv(m, m->private, 3);
2488 }
2489
2490
2491 /**
2492  * proc_show_rdrv()
2493  * @m: Synthetic file construction data
2494  * @adapter: pointer to our soft state
2495  * @start: starting logical drive to display
2496  * @end: ending logical drive to display
2497  *
2498  * We do not print the inquiry information since its already available through
2499  * /proc/scsi/scsi interface
2500  */
2501 static int
2502 proc_show_rdrv(struct seq_file *m, adapter_t *adapter, int start, int end )
2503 {
2504         dma_addr_t      dma_handle;
2505         logdrv_param    *lparam;
2506         megacmd_t       mc;
2507         char            *disk_array;
2508         dma_addr_t      disk_array_dma_handle;
2509         caddr_t         inquiry;
2510         struct pci_dev  *pdev;
2511         u8      *rdrv_state;
2512         int     num_ldrv;
2513         u32     array_sz;
2514         int     i;
2515
2516         if( make_local_pdev(adapter, &pdev) != 0 )
2517                 return 0;
2518
2519         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2520                 goto free_pdev;
2521
2522         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2523                 seq_puts(m, "Adapter inquiry failed.\n");
2524                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2525                 goto free_inquiry;
2526         }
2527
2528         memset(&mc, 0, sizeof(megacmd_t));
2529
2530         if( adapter->flag & BOARD_40LD ) {
2531                 array_sz = sizeof(disk_array_40ld);
2532
2533                 rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
2534
2535                 num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
2536         }
2537         else {
2538                 array_sz = sizeof(disk_array_8ld);
2539
2540                 rdrv_state = ((mraid_ext_inquiry *)inquiry)->
2541                         raid_inq.logdrv_info.ldrv_state;
2542
2543                 num_ldrv = ((mraid_ext_inquiry *)inquiry)->
2544                         raid_inq.logdrv_info.num_ldrv;
2545         }
2546
2547         disk_array = dma_alloc_coherent(&pdev->dev, array_sz,
2548                                         &disk_array_dma_handle, GFP_KERNEL);
2549
2550         if( disk_array == NULL ) {
2551                 seq_puts(m, "memory not available.\n");
2552                 goto free_inquiry;
2553         }
2554
2555         mc.xferaddr = (u32)disk_array_dma_handle;
2556
2557         if( adapter->flag & BOARD_40LD ) {
2558                 mc.cmd = FC_NEW_CONFIG;
2559                 mc.opcode = OP_DCMD_READ_CONFIG;
2560
2561                 if( mega_internal_command(adapter, &mc, NULL) ) {
2562                         seq_puts(m, "40LD read config failed.\n");
2563                         goto free_pci;
2564                 }
2565
2566         }
2567         else {
2568                 mc.cmd = NEW_READ_CONFIG_8LD;
2569
2570                 if( mega_internal_command(adapter, &mc, NULL) ) {
2571                         mc.cmd = READ_CONFIG_8LD;
2572                         if( mega_internal_command(adapter, &mc, NULL) ) {
2573                                 seq_puts(m, "8LD read config failed.\n");
2574                                 goto free_pci;
2575                         }
2576                 }
2577         }
2578
2579         for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
2580
2581                 if( adapter->flag & BOARD_40LD ) {
2582                         lparam =
2583                         &((disk_array_40ld *)disk_array)->ldrv[i].lparam;
2584                 }
2585                 else {
2586                         lparam =
2587                         &((disk_array_8ld *)disk_array)->ldrv[i].lparam;
2588                 }
2589
2590                 /*
2591                  * Check for overflow. We print less than 240 characters for
2592                  * information about each logical drive.
2593                  */
2594                 seq_printf(m, "Logical drive:%2d:, ", i);
2595
2596                 switch( rdrv_state[i] & 0x0F ) {
2597                 case RDRV_OFFLINE:
2598                         seq_puts(m, "state: offline");
2599                         break;
2600                 case RDRV_DEGRADED:
2601                         seq_puts(m, "state: degraded");
2602                         break;
2603                 case RDRV_OPTIMAL:
2604                         seq_puts(m, "state: optimal");
2605                         break;
2606                 case RDRV_DELETED:
2607                         seq_puts(m, "state: deleted");
2608                         break;
2609                 default:
2610                         seq_puts(m, "state: unknown");
2611                         break;
2612                 }
2613
2614                 /*
2615                  * Check if check consistency or initialization is going on
2616                  * for this logical drive.
2617                  */
2618                 if( (rdrv_state[i] & 0xF0) == 0x20 )
2619                         seq_puts(m, ", check-consistency in progress");
2620                 else if( (rdrv_state[i] & 0xF0) == 0x10 )
2621                         seq_puts(m, ", initialization in progress");
2622
2623                 seq_putc(m, '\n');
2624
2625                 seq_printf(m, "Span depth:%3d, ", lparam->span_depth);
2626                 seq_printf(m, "RAID level:%3d, ", lparam->level);
2627                 seq_printf(m, "Stripe size:%3d, ",
2628                            lparam->stripe_sz ? lparam->stripe_sz/2: 128);
2629                 seq_printf(m, "Row size:%3d\n", lparam->row_size);
2630
2631                 seq_puts(m, "Read Policy: ");
2632                 switch(lparam->read_ahead) {
2633                 case NO_READ_AHEAD:
2634                         seq_puts(m, "No read ahead, ");
2635                         break;
2636                 case READ_AHEAD:
2637                         seq_puts(m, "Read ahead, ");
2638                         break;
2639                 case ADAP_READ_AHEAD:
2640                         seq_puts(m, "Adaptive, ");
2641                         break;
2642
2643                 }
2644
2645                 seq_puts(m, "Write Policy: ");
2646                 switch(lparam->write_mode) {
2647                 case WRMODE_WRITE_THRU:
2648                         seq_puts(m, "Write thru, ");
2649                         break;
2650                 case WRMODE_WRITE_BACK:
2651                         seq_puts(m, "Write back, ");
2652                         break;
2653                 }
2654
2655                 seq_puts(m, "Cache Policy: ");
2656                 switch(lparam->direct_io) {
2657                 case CACHED_IO:
2658                         seq_puts(m, "Cached IO\n\n");
2659                         break;
2660                 case DIRECT_IO:
2661                         seq_puts(m, "Direct IO\n\n");
2662                         break;
2663                 }
2664         }
2665
2666 free_pci:
2667         dma_free_coherent(&pdev->dev, array_sz, disk_array,
2668                           disk_array_dma_handle);
2669 free_inquiry:
2670         mega_free_inquiry(inquiry, dma_handle, pdev);
2671 free_pdev:
2672         free_local_pdev(pdev);
2673         return 0;
2674 }
2675
2676 /**
2677  * proc_show_rdrv_10()
2678  * @m: Synthetic file construction data
2679  * @v: File iterator
2680  *
2681  * Display real time information about the logical drives 0 through 9.
2682  */
2683 static int
2684 proc_show_rdrv_10(struct seq_file *m, void *v)
2685 {
2686         return proc_show_rdrv(m, m->private, 0, 9);
2687 }
2688
2689
2690 /**
2691  * proc_show_rdrv_20()
2692  * @m: Synthetic file construction data
2693  * @v: File iterator
2694  *
2695  * Display real time information about the logical drives 0 through 9.
2696  */
2697 static int
2698 proc_show_rdrv_20(struct seq_file *m, void *v)
2699 {
2700         return proc_show_rdrv(m, m->private, 10, 19);
2701 }
2702
2703
2704 /**
2705  * proc_show_rdrv_30()
2706  * @m: Synthetic file construction data
2707  * @v: File iterator
2708  *
2709  * Display real time information about the logical drives 0 through 9.
2710  */
2711 static int
2712 proc_show_rdrv_30(struct seq_file *m, void *v)
2713 {
2714         return proc_show_rdrv(m, m->private, 20, 29);
2715 }
2716
2717
2718 /**
2719  * proc_show_rdrv_40()
2720  * @m: Synthetic file construction data
2721  * @v: File iterator
2722  *
2723  * Display real time information about the logical drives 0 through 9.
2724  */
2725 static int
2726 proc_show_rdrv_40(struct seq_file *m, void *v)
2727 {
2728         return proc_show_rdrv(m, m->private, 30, 39);
2729 }
2730
2731 /**
2732  * mega_create_proc_entry()
2733  * @index: index in soft state array
2734  * @parent: parent node for this /proc entry
2735  *
2736  * Creates /proc entries for our controllers.
2737  */
2738 static void
2739 mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2740 {
2741         adapter_t *adapter = hba_soft_state[index];
2742         struct proc_dir_entry *dir;
2743         u8 string[16];
2744
2745         sprintf(string, "hba%d", adapter->host->host_no);
2746         dir = proc_mkdir_data(string, 0, parent, adapter);
2747         if (!dir) {
2748                 dev_warn(&adapter->dev->dev, "proc_mkdir failed\n");
2749                 return;
2750         }
2751
2752         proc_create_single_data("config", S_IRUSR, dir,
2753                         proc_show_config, adapter);
2754         proc_create_single_data("stat", S_IRUSR, dir,
2755                         proc_show_stat, adapter);
2756         proc_create_single_data("mailbox", S_IRUSR, dir,
2757                         proc_show_mbox, adapter);
2758 #if MEGA_HAVE_ENH_PROC
2759         proc_create_single_data("rebuild-rate", S_IRUSR, dir,
2760                         proc_show_rebuild_rate, adapter);
2761         proc_create_single_data("battery-status", S_IRUSR, dir,
2762                         proc_show_battery, adapter);
2763         proc_create_single_data("diskdrives-ch0", S_IRUSR, dir,
2764                         proc_show_pdrv_ch0, adapter);
2765         proc_create_single_data("diskdrives-ch1", S_IRUSR, dir,
2766                         proc_show_pdrv_ch1, adapter);
2767         proc_create_single_data("diskdrives-ch2", S_IRUSR, dir,
2768                         proc_show_pdrv_ch2, adapter);
2769         proc_create_single_data("diskdrives-ch3", S_IRUSR, dir,
2770                         proc_show_pdrv_ch3, adapter);
2771         proc_create_single_data("raiddrives-0-9", S_IRUSR, dir,
2772                         proc_show_rdrv_10, adapter);
2773         proc_create_single_data("raiddrives-10-19", S_IRUSR, dir,
2774                         proc_show_rdrv_20, adapter);
2775         proc_create_single_data("raiddrives-20-29", S_IRUSR, dir,
2776                         proc_show_rdrv_30, adapter);
2777         proc_create_single_data("raiddrives-30-39", S_IRUSR, dir,
2778                         proc_show_rdrv_40, adapter);
2779 #endif
2780 }
2781
2782 #else
2783 static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2784 {
2785 }
2786 #endif
2787
2788
2789 /*
2790  * megaraid_biosparam()
2791  *
2792  * Return the disk geometry for a particular disk
2793  */
2794 static int
2795 megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
2796                     sector_t capacity, int geom[])
2797 {
2798         adapter_t       *adapter;
2799         int     heads;
2800         int     sectors;
2801         int     cylinders;
2802
2803         /* Get pointer to host config structure */
2804         adapter = (adapter_t *)sdev->host->hostdata;
2805
2806         if (IS_RAID_CH(adapter, sdev->channel)) {
2807                         /* Default heads (64) & sectors (32) */
2808                         heads = 64;
2809                         sectors = 32;
2810                         cylinders = (ulong)capacity / (heads * sectors);
2811
2812                         /*
2813                          * Handle extended translation size for logical drives
2814                          * > 1Gb
2815                          */
2816                         if ((ulong)capacity >= 0x200000) {
2817                                 heads = 255;
2818                                 sectors = 63;
2819                                 cylinders = (ulong)capacity / (heads * sectors);
2820                         }
2821
2822                         /* return result */
2823                         geom[0] = heads;
2824                         geom[1] = sectors;
2825                         geom[2] = cylinders;
2826         }
2827         else {
2828                 if (scsi_partsize(bdev, capacity, geom))
2829                         return 0;
2830
2831                 dev_info(&adapter->dev->dev,
2832                          "invalid partition on this disk on channel %d\n",
2833                          sdev->channel);
2834
2835                 /* Default heads (64) & sectors (32) */
2836                 heads = 64;
2837                 sectors = 32;
2838                 cylinders = (ulong)capacity / (heads * sectors);
2839
2840                 /* Handle extended translation size for logical drives > 1Gb */
2841                 if ((ulong)capacity >= 0x200000) {
2842                         heads = 255;
2843                         sectors = 63;
2844                         cylinders = (ulong)capacity / (heads * sectors);
2845                 }
2846
2847                 /* return result */
2848                 geom[0] = heads;
2849                 geom[1] = sectors;
2850                 geom[2] = cylinders;
2851         }
2852
2853         return 0;
2854 }
2855
2856 /**
2857  * mega_init_scb()
2858  * @adapter: pointer to our soft state
2859  *
2860  * Allocate memory for the various pointers in the scb structures:
2861  * scatter-gather list pointer, passthru and extended passthru structure
2862  * pointers.
2863  */
2864 static int
2865 mega_init_scb(adapter_t *adapter)
2866 {
2867         scb_t   *scb;
2868         int     i;
2869
2870         for( i = 0; i < adapter->max_cmds; i++ ) {
2871
2872                 scb = &adapter->scb_list[i];
2873
2874                 scb->sgl64 = NULL;
2875                 scb->sgl = NULL;
2876                 scb->pthru = NULL;
2877                 scb->epthru = NULL;
2878         }
2879
2880         for( i = 0; i < adapter->max_cmds; i++ ) {
2881
2882                 scb = &adapter->scb_list[i];
2883
2884                 scb->idx = i;
2885
2886                 scb->sgl64 = dma_alloc_coherent(&adapter->dev->dev,
2887                                                 sizeof(mega_sgl64) * adapter->sglen,
2888                                                 &scb->sgl_dma_addr, GFP_KERNEL);
2889
2890                 scb->sgl = (mega_sglist *)scb->sgl64;
2891
2892                 if( !scb->sgl ) {
2893                         dev_warn(&adapter->dev->dev, "RAID: Can't allocate sglist\n");
2894                         mega_free_sgl(adapter);
2895                         return -1;
2896                 }
2897
2898                 scb->pthru = dma_alloc_coherent(&adapter->dev->dev,
2899                                                 sizeof(mega_passthru),
2900                                                 &scb->pthru_dma_addr, GFP_KERNEL);
2901
2902                 if( !scb->pthru ) {
2903                         dev_warn(&adapter->dev->dev, "RAID: Can't allocate passthru\n");
2904                         mega_free_sgl(adapter);
2905                         return -1;
2906                 }
2907
2908                 scb->epthru = dma_alloc_coherent(&adapter->dev->dev,
2909                                                  sizeof(mega_ext_passthru),
2910                                                  &scb->epthru_dma_addr, GFP_KERNEL);
2911
2912                 if( !scb->epthru ) {
2913                         dev_warn(&adapter->dev->dev,
2914                                 "Can't allocate extended passthru\n");
2915                         mega_free_sgl(adapter);
2916                         return -1;
2917                 }
2918
2919
2920                 scb->dma_type = MEGA_DMA_TYPE_NONE;
2921
2922                 /*
2923                  * Link to free list
2924                  * lock not required since we are loading the driver, so no
2925                  * commands possible right now.
2926                  */
2927                 scb->state = SCB_FREE;
2928                 scb->cmd = NULL;
2929                 list_add(&scb->list, &adapter->free_list);
2930         }
2931
2932         return 0;
2933 }
2934
2935
2936 /**
2937  * megadev_open()
2938  * @inode: unused
2939  * @filep: unused
2940  *
2941  * Routines for the character/ioctl interface to the driver. Find out if this
2942  * is a valid open.
2943  */
2944 static int
2945 megadev_open (struct inode *inode, struct file *filep)
2946 {
2947         /*
2948          * Only allow superuser to access private ioctl interface
2949          */
2950         if( !capable(CAP_SYS_ADMIN) ) return -EACCES;
2951
2952         return 0;
2953 }
2954
2955
2956 /**
2957  * megadev_ioctl()
2958  * @filep: Our device file
2959  * @cmd: ioctl command
2960  * @arg: user buffer
2961  *
2962  * ioctl entry point for our private ioctl interface. We move the data in from
2963  * the user space, prepare the command (if necessary, convert the old MIMD
2964  * ioctl to new ioctl command), and issue a synchronous command to the
2965  * controller.
2966  */
2967 static int
2968 megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
2969 {
2970         adapter_t       *adapter;
2971         nitioctl_t      uioc;
2972         int             adapno;
2973         int             rval;
2974         mega_passthru   __user *upthru; /* user address for passthru */
2975         mega_passthru   *pthru;         /* copy user passthru here */
2976         dma_addr_t      pthru_dma_hndl;
2977         void            *data = NULL;   /* data to be transferred */
2978         dma_addr_t      data_dma_hndl;  /* dma handle for data xfer area */
2979         megacmd_t       mc;
2980 #if MEGA_HAVE_STATS
2981         megastat_t      __user *ustats = NULL;
2982         int             num_ldrv = 0;
2983 #endif
2984         u32             uxferaddr = 0;
2985         struct pci_dev  *pdev;
2986
2987         /*
2988          * Make sure only USCSICMD are issued through this interface.
2989          * MIMD application would still fire different command.
2990          */
2991         if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
2992                 return -EINVAL;
2993         }
2994
2995         /*
2996          * Check and convert a possible MIMD command to NIT command.
2997          * mega_m_to_n() copies the data from the user space, so we do not
2998          * have to do it here.
2999          * NOTE: We will need some user address to copyout the data, therefore
3000          * the inteface layer will also provide us with the required user
3001          * addresses.
3002          */
3003         memset(&uioc, 0, sizeof(nitioctl_t));
3004         if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
3005                 return rval;
3006
3007
3008         switch( uioc.opcode ) {
3009
3010         case GET_DRIVER_VER:
3011                 if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
3012                         return (-EFAULT);
3013
3014                 break;
3015
3016         case GET_N_ADAP:
3017                 if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
3018                         return (-EFAULT);
3019
3020                 /*
3021                  * Shucks. MIMD interface returns a positive value for number
3022                  * of adapters. TODO: Change it to return 0 when there is no
3023                  * applicatio using mimd interface.
3024                  */
3025                 return hba_count;
3026
3027         case GET_ADAP_INFO:
3028
3029                 /*
3030                  * Which adapter
3031                  */
3032                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3033                         return (-ENODEV);
3034
3035                 if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
3036                                 sizeof(struct mcontroller)) )
3037                         return (-EFAULT);
3038                 break;
3039
3040 #if MEGA_HAVE_STATS
3041
3042         case GET_STATS:
3043                 /*
3044                  * Which adapter
3045                  */
3046                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3047                         return (-ENODEV);
3048
3049                 adapter = hba_soft_state[adapno];
3050
3051                 ustats = uioc.uioc_uaddr;
3052
3053                 if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
3054                         return (-EFAULT);
3055
3056                 /*
3057                  * Check for the validity of the logical drive number
3058                  */
3059                 if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
3060
3061                 if( copy_to_user(ustats->nreads, adapter->nreads,
3062                                         num_ldrv*sizeof(u32)) )
3063                         return -EFAULT;
3064
3065                 if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
3066                                         num_ldrv*sizeof(u32)) )
3067                         return -EFAULT;
3068
3069                 if( copy_to_user(ustats->nwrites, adapter->nwrites,
3070                                         num_ldrv*sizeof(u32)) )
3071                         return -EFAULT;
3072
3073                 if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
3074                                         num_ldrv*sizeof(u32)) )
3075                         return -EFAULT;
3076
3077                 if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
3078                                         num_ldrv*sizeof(u32)) )
3079                         return -EFAULT;
3080
3081                 if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
3082                                         num_ldrv*sizeof(u32)) )
3083                         return -EFAULT;
3084
3085                 return 0;
3086
3087 #endif
3088         case MBOX_CMD:
3089
3090                 /*
3091                  * Which adapter
3092                  */
3093                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3094                         return (-ENODEV);
3095
3096                 adapter = hba_soft_state[adapno];
3097
3098                 /*
3099                  * Deletion of logical drive is a special case. The adapter
3100                  * should be quiescent before this command is issued.
3101                  */
3102                 if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
3103                                 uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
3104
3105                         /*
3106                          * Do we support this feature
3107                          */
3108                         if( !adapter->support_random_del ) {
3109                                 dev_warn(&adapter->dev->dev, "logdrv "
3110                                         "delete on non-supporting F/W\n");
3111
3112                                 return (-EINVAL);
3113                         }
3114
3115                         rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
3116
3117                         if( rval == 0 ) {
3118                                 memset(&mc, 0, sizeof(megacmd_t));
3119
3120                                 mc.status = rval;
3121
3122                                 rval = mega_n_to_m((void __user *)arg, &mc);
3123                         }
3124
3125                         return rval;
3126                 }
3127                 /*
3128                  * This interface only support the regular passthru commands.
3129                  * Reject extended passthru and 64-bit passthru
3130                  */
3131                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
3132                         uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
3133
3134                         dev_warn(&adapter->dev->dev, "rejected passthru\n");
3135
3136                         return (-EINVAL);
3137                 }
3138
3139                 /*
3140                  * For all internal commands, the buffer must be allocated in
3141                  * <4GB address range
3142                  */
3143                 if( make_local_pdev(adapter, &pdev) != 0 )
3144                         return -EIO;
3145
3146                 /* Is it a passthru command or a DCMD */
3147                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
3148                         /* Passthru commands */
3149
3150                         pthru = dma_alloc_coherent(&pdev->dev,
3151                                                    sizeof(mega_passthru),
3152                                                    &pthru_dma_hndl, GFP_KERNEL);
3153
3154                         if( pthru == NULL ) {
3155                                 free_local_pdev(pdev);
3156                                 return (-ENOMEM);
3157                         }
3158
3159                         /*
3160                          * The user passthru structure
3161                          */
3162                         upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr;
3163
3164                         /*
3165                          * Copy in the user passthru here.
3166                          */
3167                         if( copy_from_user(pthru, upthru,
3168                                                 sizeof(mega_passthru)) ) {
3169
3170                                 dma_free_coherent(&pdev->dev,
3171                                                   sizeof(mega_passthru),
3172                                                   pthru, pthru_dma_hndl);
3173
3174                                 free_local_pdev(pdev);
3175
3176                                 return (-EFAULT);
3177                         }
3178
3179                         /*
3180                          * Is there a data transfer
3181                          */
3182                         if( pthru->dataxferlen ) {
3183                                 data = dma_alloc_coherent(&pdev->dev,
3184                                                           pthru->dataxferlen,
3185                                                           &data_dma_hndl,
3186                                                           GFP_KERNEL);
3187
3188                                 if( data == NULL ) {
3189                                         dma_free_coherent(&pdev->dev,
3190                                                           sizeof(mega_passthru),
3191                                                           pthru,
3192                                                           pthru_dma_hndl);
3193
3194                                         free_local_pdev(pdev);
3195
3196                                         return (-ENOMEM);
3197                                 }
3198
3199                                 /*
3200                                  * Save the user address and point the kernel
3201                                  * address at just allocated memory
3202                                  */
3203                                 uxferaddr = pthru->dataxferaddr;
3204                                 pthru->dataxferaddr = data_dma_hndl;
3205                         }
3206
3207
3208                         /*
3209                          * Is data coming down-stream
3210                          */
3211                         if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) {
3212                                 /*
3213                                  * Get the user data
3214                                  */
3215                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3216                                                         pthru->dataxferlen) ) {
3217                                         rval = (-EFAULT);
3218                                         goto freemem_and_return;
3219                                 }
3220                         }
3221
3222                         memset(&mc, 0, sizeof(megacmd_t));
3223
3224                         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
3225                         mc.xferaddr = (u32)pthru_dma_hndl;
3226
3227                         /*
3228                          * Issue the command
3229                          */
3230                         mega_internal_command(adapter, &mc, pthru);
3231
3232                         rval = mega_n_to_m((void __user *)arg, &mc);
3233
3234                         if( rval ) goto freemem_and_return;
3235
3236
3237                         /*
3238                          * Is data going up-stream
3239                          */
3240                         if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
3241                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3242                                                         pthru->dataxferlen) ) {
3243                                         rval = (-EFAULT);
3244                                 }
3245                         }
3246
3247                         /*
3248                          * Send the request sense data also, irrespective of
3249                          * whether the user has asked for it or not.
3250                          */
3251                         if (copy_to_user(upthru->reqsensearea,
3252                                         pthru->reqsensearea, 14))
3253                                 rval = -EFAULT;
3254
3255 freemem_and_return:
3256                         if( pthru->dataxferlen ) {
3257                                 dma_free_coherent(&pdev->dev,
3258                                                   pthru->dataxferlen, data,
3259                                                   data_dma_hndl);
3260                         }
3261
3262                         dma_free_coherent(&pdev->dev, sizeof(mega_passthru),
3263                                           pthru, pthru_dma_hndl);
3264
3265                         free_local_pdev(pdev);
3266
3267                         return rval;
3268                 }
3269                 else {
3270                         /* DCMD commands */
3271
3272                         /*
3273                          * Is there a data transfer
3274                          */
3275                         if( uioc.xferlen ) {
3276                                 data = dma_alloc_coherent(&pdev->dev,
3277                                                           uioc.xferlen,
3278                                                           &data_dma_hndl,
3279                                                           GFP_KERNEL);
3280
3281                                 if( data == NULL ) {
3282                                         free_local_pdev(pdev);
3283                                         return (-ENOMEM);
3284                                 }
3285
3286                                 uxferaddr = MBOX(uioc)->xferaddr;
3287                         }
3288
3289                         /*
3290                          * Is data coming down-stream
3291                          */
3292                         if( uioc.xferlen && (uioc.flags & UIOC_WR) ) {
3293                                 /*
3294                                  * Get the user data
3295                                  */
3296                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3297                                                         uioc.xferlen) ) {
3298
3299                                         dma_free_coherent(&pdev->dev,
3300                                                           uioc.xferlen, data,
3301                                                           data_dma_hndl);
3302
3303                                         free_local_pdev(pdev);
3304
3305                                         return (-EFAULT);
3306                                 }
3307                         }
3308
3309                         memcpy(&mc, MBOX(uioc), sizeof(megacmd_t));
3310
3311                         mc.xferaddr = (u32)data_dma_hndl;
3312
3313                         /*
3314                          * Issue the command
3315                          */
3316                         mega_internal_command(adapter, &mc, NULL);
3317
3318                         rval = mega_n_to_m((void __user *)arg, &mc);
3319
3320                         if( rval ) {
3321                                 if( uioc.xferlen ) {
3322                                         dma_free_coherent(&pdev->dev,
3323                                                           uioc.xferlen, data,
3324                                                           data_dma_hndl);
3325                                 }
3326
3327                                 free_local_pdev(pdev);
3328
3329                                 return rval;
3330                         }
3331
3332                         /*
3333                          * Is data going up-stream
3334                          */
3335                         if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
3336                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3337                                                         uioc.xferlen) ) {
3338
3339                                         rval = (-EFAULT);
3340                                 }
3341                         }
3342
3343                         if( uioc.xferlen ) {
3344                                 dma_free_coherent(&pdev->dev, uioc.xferlen,
3345                                                   data, data_dma_hndl);
3346                         }
3347
3348                         free_local_pdev(pdev);
3349
3350                         return rval;
3351                 }
3352
3353         default:
3354                 return (-EINVAL);
3355         }
3356
3357         return 0;
3358 }
3359
3360 static long
3361 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3362 {
3363         int ret;
3364
3365         mutex_lock(&megadev_mutex);
3366         ret = megadev_ioctl(filep, cmd, arg);
3367         mutex_unlock(&megadev_mutex);
3368
3369         return ret;
3370 }
3371
3372 /**
3373  * mega_m_to_n()
3374  * @arg: user address
3375  * @uioc: new ioctl structure
3376  *
3377  * A thin layer to convert older mimd interface ioctl structure to NIT ioctl
3378  * structure
3379  *
3380  * Converts the older mimd ioctl structure to newer NIT structure
3381  */
3382 static int
3383 mega_m_to_n(void __user *arg, nitioctl_t *uioc)
3384 {
3385         struct uioctl_t uioc_mimd;
3386         char    signature[8] = {0};
3387         u8      opcode;
3388         u8      subopcode;
3389
3390
3391         /*
3392          * check is the application conforms to NIT. We do not have to do much
3393          * in that case.
3394          * We exploit the fact that the signature is stored in the very
3395          * beginning of the structure.
3396          */
3397
3398         if( copy_from_user(signature, arg, 7) )
3399                 return (-EFAULT);
3400
3401         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3402
3403                 /*
3404                  * NOTE NOTE: The nit ioctl is still under flux because of
3405                  * change of mailbox definition, in HPE. No applications yet
3406                  * use this interface and let's not have applications use this
3407                  * interface till the new specifitions are in place.
3408                  */
3409                 return -EINVAL;
3410 #if 0
3411                 if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
3412                         return (-EFAULT);
3413                 return 0;
3414 #endif
3415         }
3416
3417         /*
3418          * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
3419          *
3420          * Get the user ioctl structure
3421          */
3422         if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
3423                 return (-EFAULT);
3424
3425
3426         /*
3427          * Get the opcode and subopcode for the commands
3428          */
3429         opcode = uioc_mimd.ui.fcs.opcode;
3430         subopcode = uioc_mimd.ui.fcs.subopcode;
3431
3432         switch (opcode) {
3433         case 0x82:
3434
3435                 switch (subopcode) {
3436
3437                 case MEGAIOC_QDRVRVER:  /* Query driver version */
3438                         uioc->opcode = GET_DRIVER_VER;
3439                         uioc->uioc_uaddr = uioc_mimd.data;
3440                         break;
3441
3442                 case MEGAIOC_QNADAP:    /* Get # of adapters */
3443                         uioc->opcode = GET_N_ADAP;
3444                         uioc->uioc_uaddr = uioc_mimd.data;
3445                         break;
3446
3447                 case MEGAIOC_QADAPINFO: /* Get adapter information */
3448                         uioc->opcode = GET_ADAP_INFO;
3449                         uioc->adapno = uioc_mimd.ui.fcs.adapno;
3450                         uioc->uioc_uaddr = uioc_mimd.data;
3451                         break;
3452
3453                 default:
3454                         return(-EINVAL);
3455                 }
3456
3457                 break;
3458
3459
3460         case 0x81:
3461
3462                 uioc->opcode = MBOX_CMD;
3463                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3464
3465                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3466
3467                 uioc->xferlen = uioc_mimd.ui.fcs.length;
3468
3469                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3470                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3471
3472                 break;
3473
3474         case 0x80:
3475
3476                 uioc->opcode = MBOX_CMD;
3477                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3478
3479                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3480
3481                 /*
3482                  * Choose the xferlen bigger of input and output data
3483                  */
3484                 uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
3485                         uioc_mimd.outlen : uioc_mimd.inlen;
3486
3487                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3488                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3489
3490                 break;
3491
3492         default:
3493                 return (-EINVAL);
3494
3495         }
3496
3497         return 0;
3498 }
3499
3500 /*
3501  * mega_n_to_m()
3502  * @arg: user address
3503  * @mc: mailbox command
3504  *
3505  * Updates the status information to the application, depending on application
3506  * conforms to older mimd ioctl interface or newer NIT ioctl interface
3507  */
3508 static int
3509 mega_n_to_m(void __user *arg, megacmd_t *mc)
3510 {
3511         nitioctl_t      __user *uiocp;
3512         megacmd_t       __user *umc;
3513         mega_passthru   __user *upthru;
3514         struct uioctl_t __user *uioc_mimd;
3515         char    signature[8] = {0};
3516
3517         /*
3518          * check is the application conforms to NIT.
3519          */
3520         if( copy_from_user(signature, arg, 7) )
3521                 return -EFAULT;
3522
3523         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3524
3525                 uiocp = arg;
3526
3527                 if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
3528                         return (-EFAULT);
3529
3530                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3531
3532                         umc = MBOX_P(uiocp);
3533
3534                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3535                                 return -EFAULT;
3536
3537                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
3538                                 return (-EFAULT);
3539                 }
3540         }
3541         else {
3542                 uioc_mimd = arg;
3543
3544                 if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
3545                         return (-EFAULT);
3546
3547                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3548
3549                         umc = (megacmd_t __user *)uioc_mimd->mbox;
3550
3551                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3552                                 return (-EFAULT);
3553
3554                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
3555                                 return (-EFAULT);
3556                 }
3557         }
3558
3559         return 0;
3560 }
3561
3562
3563 /*
3564  * MEGARAID 'FW' commands.
3565  */
3566
3567 /**
3568  * mega_is_bios_enabled()
3569  * @adapter: pointer to our soft state
3570  *
3571  * issue command to find out if the BIOS is enabled for this controller
3572  */
3573 static int
3574 mega_is_bios_enabled(adapter_t *adapter)
3575 {
3576         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3577         mbox_t  *mbox;
3578
3579         mbox = (mbox_t *)raw_mbox;
3580
3581         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3582
3583         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3584
3585         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3586
3587         raw_mbox[0] = IS_BIOS_ENABLED;
3588         raw_mbox[2] = GET_BIOS;
3589
3590         issue_scb_block(adapter, raw_mbox);
3591
3592         return *(char *)adapter->mega_buffer;
3593 }
3594
3595
3596 /**
3597  * mega_enum_raid_scsi()
3598  * @adapter: pointer to our soft state
3599  *
3600  * Find out what channels are RAID/SCSI. This information is used to
3601  * differentiate the virtual channels and physical channels and to support
3602  * ROMB feature and non-disk devices.
3603  */
3604 static void
3605 mega_enum_raid_scsi(adapter_t *adapter)
3606 {
3607         unsigned char raw_mbox[sizeof(struct mbox_out)];
3608         mbox_t *mbox;
3609         int i;
3610
3611         mbox = (mbox_t *)raw_mbox;
3612
3613         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3614
3615         /*
3616          * issue command to find out what channels are raid/scsi
3617          */
3618         raw_mbox[0] = CHNL_CLASS;
3619         raw_mbox[2] = GET_CHNL_CLASS;
3620
3621         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3622
3623         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3624
3625         /*
3626          * Non-ROMB firmware fail this command, so all channels
3627          * must be shown RAID
3628          */
3629         adapter->mega_ch_class = 0xFF;
3630
3631         if(!issue_scb_block(adapter, raw_mbox)) {
3632                 adapter->mega_ch_class = *((char *)adapter->mega_buffer);
3633
3634         }
3635
3636         for( i = 0; i < adapter->product_info.nchannels; i++ ) {
3637                 if( (adapter->mega_ch_class >> i) & 0x01 ) {
3638                         dev_info(&adapter->dev->dev, "channel[%d] is raid\n",
3639                                         i);
3640                 }
3641                 else {
3642                         dev_info(&adapter->dev->dev, "channel[%d] is scsi\n",
3643                                         i);
3644                 }
3645         }
3646
3647         return;
3648 }
3649
3650
3651 /**
3652  * mega_get_boot_drv()
3653  * @adapter: pointer to our soft state
3654  *
3655  * Find out which device is the boot device. Note, any logical drive or any
3656  * phyical device (e.g., a CDROM) can be designated as a boot device.
3657  */
3658 static void
3659 mega_get_boot_drv(adapter_t *adapter)
3660 {
3661         struct private_bios_data        *prv_bios_data;
3662         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3663         mbox_t  *mbox;
3664         u16     cksum = 0;
3665         u8      *cksum_p;
3666         u8      boot_pdrv;
3667         int     i;
3668
3669         mbox = (mbox_t *)raw_mbox;
3670
3671         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3672
3673         raw_mbox[0] = BIOS_PVT_DATA;
3674         raw_mbox[2] = GET_BIOS_PVT_DATA;
3675
3676         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3677
3678         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3679
3680         adapter->boot_ldrv_enabled = 0;
3681         adapter->boot_ldrv = 0;
3682
3683         adapter->boot_pdrv_enabled = 0;
3684         adapter->boot_pdrv_ch = 0;
3685         adapter->boot_pdrv_tgt = 0;
3686
3687         if(issue_scb_block(adapter, raw_mbox) == 0) {
3688                 prv_bios_data =
3689                         (struct private_bios_data *)adapter->mega_buffer;
3690
3691                 cksum = 0;
3692                 cksum_p = (char *)prv_bios_data;
3693                 for (i = 0; i < 14; i++ ) {
3694                         cksum += (u16)(*cksum_p++);
3695                 }
3696
3697                 if (prv_bios_data->cksum == (u16)(0-cksum) ) {
3698
3699                         /*
3700                          * If MSB is set, a physical drive is set as boot
3701                          * device
3702                          */
3703                         if( prv_bios_data->boot_drv & 0x80 ) {
3704                                 adapter->boot_pdrv_enabled = 1;
3705                                 boot_pdrv = prv_bios_data->boot_drv & 0x7F;
3706                                 adapter->boot_pdrv_ch = boot_pdrv / 16;
3707                                 adapter->boot_pdrv_tgt = boot_pdrv % 16;
3708                         }
3709                         else {
3710                                 adapter->boot_ldrv_enabled = 1;
3711                                 adapter->boot_ldrv = prv_bios_data->boot_drv;
3712                         }
3713                 }
3714         }
3715
3716 }
3717
3718 /**
3719  * mega_support_random_del()
3720  * @adapter: pointer to our soft state
3721  *
3722  * Find out if this controller supports random deletion and addition of
3723  * logical drives
3724  */
3725 static int
3726 mega_support_random_del(adapter_t *adapter)
3727 {
3728         unsigned char raw_mbox[sizeof(struct mbox_out)];
3729         mbox_t *mbox;
3730         int rval;
3731
3732         mbox = (mbox_t *)raw_mbox;
3733
3734         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3735
3736         /*
3737          * issue command
3738          */
3739         raw_mbox[0] = FC_DEL_LOGDRV;
3740         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3741
3742         rval = issue_scb_block(adapter, raw_mbox);
3743
3744         return !rval;
3745 }
3746
3747
3748 /**
3749  * mega_support_ext_cdb()
3750  * @adapter: pointer to our soft state
3751  *
3752  * Find out if this firmware support cdblen > 10
3753  */
3754 static int
3755 mega_support_ext_cdb(adapter_t *adapter)
3756 {
3757         unsigned char raw_mbox[sizeof(struct mbox_out)];
3758         mbox_t *mbox;
3759         int rval;
3760
3761         mbox = (mbox_t *)raw_mbox;
3762
3763         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3764         /*
3765          * issue command to find out if controller supports extended CDBs.
3766          */
3767         raw_mbox[0] = 0xA4;
3768         raw_mbox[2] = 0x16;
3769
3770         rval = issue_scb_block(adapter, raw_mbox);
3771
3772         return !rval;
3773 }
3774
3775
3776 /**
3777  * mega_del_logdrv()
3778  * @adapter: pointer to our soft state
3779  * @logdrv: logical drive to be deleted
3780  *
3781  * Delete the specified logical drive. It is the responsibility of the user
3782  * app to let the OS know about this operation.
3783  */
3784 static int
3785 mega_del_logdrv(adapter_t *adapter, int logdrv)
3786 {
3787         unsigned long flags;
3788         scb_t *scb;
3789         int rval;
3790
3791         /*
3792          * Stop sending commands to the controller, queue them internally.
3793          * When deletion is complete, ISR will flush the queue.
3794          */
3795         atomic_set(&adapter->quiescent, 1);
3796
3797         /*
3798          * Wait till all the issued commands are complete and there are no
3799          * commands in the pending queue
3800          */
3801         while (atomic_read(&adapter->pend_cmds) > 0 ||
3802                !list_empty(&adapter->pending_list))
3803                 msleep(1000);   /* sleep for 1s */
3804
3805         rval = mega_do_del_logdrv(adapter, logdrv);
3806
3807         spin_lock_irqsave(&adapter->lock, flags);
3808
3809         /*
3810          * If delete operation was successful, add 0x80 to the logical drive
3811          * ids for commands in the pending queue.
3812          */
3813         if (adapter->read_ldidmap) {
3814                 struct list_head *pos;
3815                 list_for_each(pos, &adapter->pending_list) {
3816                         scb = list_entry(pos, scb_t, list);
3817                         if (scb->pthru->logdrv < 0x80 )
3818                                 scb->pthru->logdrv += 0x80;
3819                 }
3820         }
3821
3822         atomic_set(&adapter->quiescent, 0);
3823
3824         mega_runpendq(adapter);
3825
3826         spin_unlock_irqrestore(&adapter->lock, flags);
3827
3828         return rval;
3829 }
3830
3831
3832 static int
3833 mega_do_del_logdrv(adapter_t *adapter, int logdrv)
3834 {
3835         megacmd_t       mc;
3836         int     rval;
3837
3838         memset( &mc, 0, sizeof(megacmd_t));
3839
3840         mc.cmd = FC_DEL_LOGDRV;
3841         mc.opcode = OP_DEL_LOGDRV;
3842         mc.subopcode = logdrv;
3843
3844         rval = mega_internal_command(adapter, &mc, NULL);
3845
3846         /* log this event */
3847         if(rval) {
3848                 dev_warn(&adapter->dev->dev, "Delete LD-%d failed", logdrv);
3849                 return rval;
3850         }
3851
3852         /*
3853          * After deleting first logical drive, the logical drives must be
3854          * addressed by adding 0x80 to the logical drive id.
3855          */
3856         adapter->read_ldidmap = 1;
3857
3858         return rval;
3859 }
3860
3861
3862 /**
3863  * mega_get_max_sgl()
3864  * @adapter: pointer to our soft state
3865  *
3866  * Find out the maximum number of scatter-gather elements supported by this
3867  * version of the firmware
3868  */
3869 static void
3870 mega_get_max_sgl(adapter_t *adapter)
3871 {
3872         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3873         mbox_t  *mbox;
3874
3875         mbox = (mbox_t *)raw_mbox;
3876
3877         memset(mbox, 0, sizeof(raw_mbox));
3878
3879         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3880
3881         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3882
3883         raw_mbox[0] = MAIN_MISC_OPCODE;
3884         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3885
3886
3887         if( issue_scb_block(adapter, raw_mbox) ) {
3888                 /*
3889                  * f/w does not support this command. Choose the default value
3890                  */
3891                 adapter->sglen = MIN_SGLIST;
3892         }
3893         else {
3894                 adapter->sglen = *((char *)adapter->mega_buffer);
3895
3896                 /*
3897                  * Make sure this is not more than the resources we are
3898                  * planning to allocate
3899                  */
3900                 if ( adapter->sglen > MAX_SGLIST )
3901                         adapter->sglen = MAX_SGLIST;
3902         }
3903
3904         return;
3905 }
3906
3907
3908 /**
3909  * mega_support_cluster()
3910  * @adapter: pointer to our soft state
3911  *
3912  * Find out if this firmware support cluster calls.
3913  */
3914 static int
3915 mega_support_cluster(adapter_t *adapter)
3916 {
3917         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3918         mbox_t  *mbox;
3919
3920         mbox = (mbox_t *)raw_mbox;
3921
3922         memset(mbox, 0, sizeof(raw_mbox));
3923
3924         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3925
3926         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3927
3928         /*
3929          * Try to get the initiator id. This command will succeed iff the
3930          * clustering is available on this HBA.
3931          */
3932         raw_mbox[0] = MEGA_GET_TARGET_ID;
3933
3934         if( issue_scb_block(adapter, raw_mbox) == 0 ) {
3935
3936                 /*
3937                  * Cluster support available. Get the initiator target id.
3938                  * Tell our id to mid-layer too.
3939                  */
3940                 adapter->this_id = *(u32 *)adapter->mega_buffer;
3941                 adapter->host->this_id = adapter->this_id;
3942
3943                 return 1;
3944         }
3945
3946         return 0;
3947 }
3948
3949 #ifdef CONFIG_PROC_FS
3950 /**
3951  * mega_adapinq()
3952  * @adapter: pointer to our soft state
3953  * @dma_handle: DMA address of the buffer
3954  *
3955  * Issue internal commands while interrupts are available.
3956  * We only issue direct mailbox commands from within the driver. ioctl()
3957  * interface using these routines can issue passthru commands.
3958  */
3959 static int
3960 mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle)
3961 {
3962         megacmd_t       mc;
3963
3964         memset(&mc, 0, sizeof(megacmd_t));
3965
3966         if( adapter->flag & BOARD_40LD ) {
3967                 mc.cmd = FC_NEW_CONFIG;
3968                 mc.opcode = NC_SUBOP_ENQUIRY3;
3969                 mc.subopcode = ENQ3_GET_SOLICITED_FULL;
3970         }
3971         else {
3972                 mc.cmd = MEGA_MBOXCMD_ADPEXTINQ;
3973         }
3974
3975         mc.xferaddr = (u32)dma_handle;
3976
3977         if ( mega_internal_command(adapter, &mc, NULL) != 0 ) {
3978                 return -1;
3979         }
3980
3981         return 0;
3982 }
3983
3984
3985 /**
3986  * mega_internal_dev_inquiry()
3987  * @adapter: pointer to our soft state
3988  * @ch: channel for this device
3989  * @tgt: ID of this device
3990  * @buf_dma_handle: DMA address of the buffer
3991  *
3992  * Issue the scsi inquiry for the specified device.
3993  */
3994 static int
3995 mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt,
3996                 dma_addr_t buf_dma_handle)
3997 {
3998         mega_passthru   *pthru;
3999         dma_addr_t      pthru_dma_handle;
4000         megacmd_t       mc;
4001         int             rval;
4002         struct pci_dev  *pdev;
4003
4004
4005         /*
4006          * For all internal commands, the buffer must be allocated in <4GB
4007          * address range
4008          */
4009         if( make_local_pdev(adapter, &pdev) != 0 ) return -1;
4010
4011         pthru = dma_alloc_coherent(&pdev->dev, sizeof(mega_passthru),
4012                                    &pthru_dma_handle, GFP_KERNEL);
4013
4014         if( pthru == NULL ) {
4015                 free_local_pdev(pdev);
4016                 return -1;
4017         }
4018
4019         pthru->timeout = 2;
4020         pthru->ars = 1;
4021         pthru->reqsenselen = 14;
4022         pthru->islogical = 0;
4023
4024         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch;
4025
4026         pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt;
4027
4028         pthru->cdblen = 6;
4029
4030         pthru->cdb[0] = INQUIRY;
4031         pthru->cdb[1] = 0;
4032         pthru->cdb[2] = 0;
4033         pthru->cdb[3] = 0;
4034         pthru->cdb[4] = 255;
4035         pthru->cdb[5] = 0;
4036
4037
4038         pthru->dataxferaddr = (u32)buf_dma_handle;
4039         pthru->dataxferlen = 256;
4040
4041         memset(&mc, 0, sizeof(megacmd_t));
4042
4043         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
4044         mc.xferaddr = (u32)pthru_dma_handle;
4045
4046         rval = mega_internal_command(adapter, &mc, pthru);
4047
4048         dma_free_coherent(&pdev->dev, sizeof(mega_passthru), pthru,
4049                           pthru_dma_handle);
4050
4051         free_local_pdev(pdev);
4052
4053         return rval;
4054 }
4055 #endif
4056
4057 /**
4058  * mega_internal_command()
4059  * @adapter: pointer to our soft state
4060  * @mc: the mailbox command
4061  * @pthru: Passthru structure for DCDB commands
4062  *
4063  * Issue the internal commands in interrupt mode.
4064  * The last argument is the address of the passthru structure if the command
4065  * to be fired is a passthru command
4066  *
4067  * Note: parameter 'pthru' is null for non-passthru commands.
4068  */
4069 static int
4070 mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
4071 {
4072         unsigned long flags;
4073         scb_t   *scb;
4074         int     rval;
4075
4076         /*
4077          * The internal commands share one command id and hence are
4078          * serialized. This is so because we want to reserve maximum number of
4079          * available command ids for the I/O commands.
4080          */
4081         mutex_lock(&adapter->int_mtx);
4082
4083         scb = &adapter->int_scb;
4084         memset(scb, 0, sizeof(scb_t));
4085
4086         scb->idx = CMDID_INT_CMDS;
4087         scb->state |= SCB_ACTIVE | SCB_PENDQ;
4088
4089         memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
4090
4091         /*
4092          * Is it a passthru command
4093          */
4094         if (mc->cmd == MEGA_MBOXCMD_PASSTHRU)
4095                 scb->pthru = pthru;
4096
4097         spin_lock_irqsave(&adapter->lock, flags);
4098         list_add_tail(&scb->list, &adapter->pending_list);
4099         /*
4100          * Check if the HBA is in quiescent state, e.g., during a
4101          * delete logical drive opertion. If it is, don't run
4102          * the pending_list.
4103          */
4104         if (atomic_read(&adapter->quiescent) == 0)
4105                 mega_runpendq(adapter);
4106         spin_unlock_irqrestore(&adapter->lock, flags);
4107
4108         wait_for_completion(&adapter->int_waitq);
4109
4110         mc->status = rval = adapter->int_status;
4111
4112         /*
4113          * Print a debug message for all failed commands. Applications can use
4114          * this information.
4115          */
4116         if (rval && trace_level) {
4117                 dev_info(&adapter->dev->dev, "cmd [%x, %x, %x] status:[%x]\n",
4118                         mc->cmd, mc->opcode, mc->subopcode, rval);
4119         }
4120
4121         mutex_unlock(&adapter->int_mtx);
4122         return rval;
4123 }
4124
4125 static struct scsi_host_template megaraid_template = {
4126         .module                         = THIS_MODULE,
4127         .name                           = "MegaRAID",
4128         .proc_name                      = "megaraid_legacy",
4129         .info                           = megaraid_info,
4130         .queuecommand                   = megaraid_queue,
4131         .bios_param                     = megaraid_biosparam,
4132         .max_sectors                    = MAX_SECTORS_PER_IO,
4133         .can_queue                      = MAX_COMMANDS,
4134         .this_id                        = DEFAULT_INITIATOR_ID,
4135         .sg_tablesize                   = MAX_SGLIST,
4136         .cmd_per_lun                    = DEF_CMD_PER_LUN,
4137         .eh_abort_handler               = megaraid_abort,
4138         .eh_device_reset_handler        = megaraid_reset,
4139         .eh_bus_reset_handler           = megaraid_reset,
4140         .eh_host_reset_handler          = megaraid_reset,
4141         .no_write_same                  = 1,
4142 };
4143
4144 static int
4145 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
4146 {
4147         struct Scsi_Host *host;
4148         adapter_t *adapter;
4149         unsigned long mega_baseport, tbase, flag = 0;
4150         u16 subsysid, subsysvid;
4151         u8 pci_bus, pci_dev_func;
4152         int irq, i, j;
4153         int error = -ENODEV;
4154
4155         if (hba_count >= MAX_CONTROLLERS)
4156                 goto out;
4157
4158         if (pci_enable_device(pdev))
4159                 goto out;
4160         pci_set_master(pdev);
4161
4162         pci_bus = pdev->bus->number;
4163         pci_dev_func = pdev->devfn;
4164
4165         /*
4166          * The megaraid3 stuff reports the ID of the Intel part which is not
4167          * remotely specific to the megaraid
4168          */
4169         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
4170                 u16 magic;
4171                 /*
4172                  * Don't fall over the Compaq management cards using the same
4173                  * PCI identifier
4174                  */
4175                 if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
4176                     pdev->subsystem_device == 0xC000)
4177                         goto out_disable_device;
4178                 /* Now check the magic signature byte */
4179                 pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
4180                 if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
4181                         goto out_disable_device;
4182                 /* Ok it is probably a megaraid */
4183         }
4184
4185         /*
4186          * For these vendor and device ids, signature offsets are not
4187          * valid and 64 bit is implicit
4188          */
4189         if (id->driver_data & BOARD_64BIT)
4190                 flag |= BOARD_64BIT;
4191         else {
4192                 u32 magic64;
4193
4194                 pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
4195                 if (magic64 == HBA_SIGNATURE_64BIT)
4196                         flag |= BOARD_64BIT;
4197         }
4198
4199         subsysvid = pdev->subsystem_vendor;
4200         subsysid = pdev->subsystem_device;
4201
4202         dev_notice(&pdev->dev, "found 0x%4.04x:0x%4.04x\n",
4203                 id->vendor, id->device);
4204
4205         /* Read the base port and IRQ from PCI */
4206         mega_baseport = pci_resource_start(pdev, 0);
4207         irq = pdev->irq;
4208
4209         tbase = mega_baseport;
4210         if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
4211                 flag |= BOARD_MEMMAP;
4212
4213                 if (!request_mem_region(mega_baseport, 128, "megaraid")) {
4214                         dev_warn(&pdev->dev, "mem region busy!\n");
4215                         goto out_disable_device;
4216                 }
4217
4218                 mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
4219                 if (!mega_baseport) {
4220                         dev_warn(&pdev->dev, "could not map hba memory\n");
4221                         goto out_release_region;
4222                 }
4223         } else {
4224                 flag |= BOARD_IOMAP;
4225                 mega_baseport += 0x10;
4226
4227                 if (!request_region(mega_baseport, 16, "megaraid"))
4228                         goto out_disable_device;
4229         }
4230
4231         /* Initialize SCSI Host structure */
4232         host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
4233         if (!host)
4234                 goto out_iounmap;
4235
4236         adapter = (adapter_t *)host->hostdata;
4237         memset(adapter, 0, sizeof(adapter_t));
4238
4239         dev_notice(&pdev->dev,
4240                 "scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
4241                 host->host_no, mega_baseport, irq);
4242
4243         adapter->base = mega_baseport;
4244         if (flag & BOARD_MEMMAP)
4245                 adapter->mmio_base = (void __iomem *) mega_baseport;
4246
4247         INIT_LIST_HEAD(&adapter->free_list);
4248         INIT_LIST_HEAD(&adapter->pending_list);
4249         INIT_LIST_HEAD(&adapter->completed_list);
4250
4251         adapter->flag = flag;
4252         spin_lock_init(&adapter->lock);
4253
4254         host->cmd_per_lun = max_cmd_per_lun;
4255         host->max_sectors = max_sectors_per_io;
4256
4257         adapter->dev = pdev;
4258         adapter->host = host;
4259
4260         adapter->host->irq = irq;
4261
4262         if (flag & BOARD_MEMMAP)
4263                 adapter->host->base = tbase;
4264         else {
4265                 adapter->host->io_port = tbase;
4266                 adapter->host->n_io_port = 16;
4267         }
4268
4269         adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;
4270
4271         /*
4272          * Allocate buffer to issue internal commands.
4273          */
4274         adapter->mega_buffer = dma_alloc_coherent(&adapter->dev->dev,
4275                                                   MEGA_BUFFER_SIZE,
4276                                                   &adapter->buf_dma_handle,
4277                                                   GFP_KERNEL);
4278         if (!adapter->mega_buffer) {
4279                 dev_warn(&pdev->dev, "out of RAM\n");
4280                 goto out_host_put;
4281         }
4282
4283         adapter->scb_list = kmalloc_array(MAX_COMMANDS, sizeof(scb_t),
4284                                           GFP_KERNEL);
4285         if (!adapter->scb_list) {
4286                 dev_warn(&pdev->dev, "out of RAM\n");
4287                 goto out_free_cmd_buffer;
4288         }
4289
4290         if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
4291                                 megaraid_isr_memmapped : megaraid_isr_iomapped,
4292                                         IRQF_SHARED, "megaraid", adapter)) {
4293                 dev_warn(&pdev->dev, "Couldn't register IRQ %d!\n", irq);
4294                 goto out_free_scb_list;
4295         }
4296
4297         if (mega_setup_mailbox(adapter))
4298                 goto out_free_irq;
4299
4300         if (mega_query_adapter(adapter))
4301                 goto out_free_mbox;
4302
4303         /*
4304          * Have checks for some buggy f/w
4305          */
4306         if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
4307                 /*
4308                  * Which firmware
4309                  */
4310                 if (!strcmp(adapter->fw_version, "3.00") ||
4311                                 !strcmp(adapter->fw_version, "3.01")) {
4312
4313                         dev_warn(&pdev->dev,
4314                                 "Your card is a Dell PERC "
4315                                 "2/SC RAID controller with "
4316                                 "firmware\nmegaraid: 3.00 or 3.01.  "
4317                                 "This driver is known to have "
4318                                 "corruption issues\nmegaraid: with "
4319                                 "those firmware versions on this "
4320                                 "specific card.  In order\nmegaraid: "
4321                                 "to protect your data, please upgrade "
4322                                 "your firmware to version\nmegaraid: "
4323                                 "3.10 or later, available from the "
4324                                 "Dell Technical Support web\n"
4325                                 "megaraid: site at\nhttp://support."
4326                                 "dell.com/us/en/filelib/download/"
4327                                 "index.asp?fileid=2940\n"
4328                         );
4329                 }
4330         }
4331
4332         /*
4333          * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
4334          * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
4335          * support, since this firmware cannot handle 64 bit
4336          * addressing
4337          */
4338         if ((subsysvid == PCI_VENDOR_ID_HP) &&
4339             ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
4340                 /*
4341                  * which firmware
4342                  */
4343                 if (!strcmp(adapter->fw_version, "H01.07") ||
4344                     !strcmp(adapter->fw_version, "H01.08") ||
4345                     !strcmp(adapter->fw_version, "H01.09") ) {
4346                         dev_warn(&pdev->dev,
4347                                 "Firmware H.01.07, "
4348                                 "H.01.08, and H.01.09 on 1M/2M "
4349                                 "controllers\n"
4350                                 "do not support 64 bit "
4351                                 "addressing.\nDISABLING "
4352                                 "64 bit support.\n");
4353                         adapter->flag &= ~BOARD_64BIT;
4354                 }
4355         }
4356
4357         if (mega_is_bios_enabled(adapter))
4358                 mega_hbas[hba_count].is_bios_enabled = 1;
4359         mega_hbas[hba_count].hostdata_addr = adapter;
4360
4361         /*
4362          * Find out which channel is raid and which is scsi. This is
4363          * for ROMB support.
4364          */
4365         mega_enum_raid_scsi(adapter);
4366
4367         /*
4368          * Find out if a logical drive is set as the boot drive. If
4369          * there is one, will make that as the first logical drive.
4370          * ROMB: Do we have to boot from a physical drive. Then all
4371          * the physical drives would appear before the logical disks.
4372          * Else, all the physical drives would be exported to the mid
4373          * layer after logical drives.
4374          */
4375         mega_get_boot_drv(adapter);
4376
4377         if (adapter->boot_pdrv_enabled) {
4378                 j = adapter->product_info.nchannels;
4379                 for( i = 0; i < j; i++ )
4380                         adapter->logdrv_chan[i] = 0;
4381                 for( i = j; i < NVIRT_CHAN + j; i++ )
4382                         adapter->logdrv_chan[i] = 1;
4383         } else {
4384                 for (i = 0; i < NVIRT_CHAN; i++)
4385                         adapter->logdrv_chan[i] = 1;
4386                 for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
4387                         adapter->logdrv_chan[i] = 0;
4388                 adapter->mega_ch_class <<= NVIRT_CHAN;
4389         }
4390
4391         /*
4392          * Do we support random deletion and addition of logical
4393          * drives
4394          */
4395         adapter->read_ldidmap = 0;      /* set it after first logdrv
4396                                                    delete cmd */
4397         adapter->support_random_del = mega_support_random_del(adapter);
4398
4399         /* Initialize SCBs */
4400         if (mega_init_scb(adapter))
4401                 goto out_free_mbox;
4402
4403         /*
4404          * Reset the pending commands counter
4405          */
4406         atomic_set(&adapter->pend_cmds, 0);
4407
4408         /*
4409          * Reset the adapter quiescent flag
4410          */
4411         atomic_set(&adapter->quiescent, 0);
4412
4413         hba_soft_state[hba_count] = adapter;
4414
4415         /*
4416          * Fill in the structure which needs to be passed back to the
4417          * application when it does an ioctl() for controller related
4418          * information.
4419          */
4420         i = hba_count;
4421
4422         mcontroller[i].base = mega_baseport;
4423         mcontroller[i].irq = irq;
4424         mcontroller[i].numldrv = adapter->numldrv;
4425         mcontroller[i].pcibus = pci_bus;
4426         mcontroller[i].pcidev = id->device;
4427         mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
4428         mcontroller[i].pciid = -1;
4429         mcontroller[i].pcivendor = id->vendor;
4430         mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
4431         mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;
4432
4433
4434         /* Set the Mode of addressing to 64 bit if we can */
4435         if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
4436                 dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
4437                 adapter->has_64bit_addr = 1;
4438         } else  {
4439                 dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
4440                 adapter->has_64bit_addr = 0;
4441         }
4442
4443         mutex_init(&adapter->int_mtx);
4444         init_completion(&adapter->int_waitq);
4445
4446         adapter->this_id = DEFAULT_INITIATOR_ID;
4447         adapter->host->this_id = DEFAULT_INITIATOR_ID;
4448
4449 #if MEGA_HAVE_CLUSTERING
4450         /*
4451          * Is cluster support enabled on this controller
4452          * Note: In a cluster the HBAs ( the initiators ) will have
4453          * different target IDs and we cannot assume it to be 7. Call
4454          * to mega_support_cluster() will get the target ids also if
4455          * the cluster support is available
4456          */
4457         adapter->has_cluster = mega_support_cluster(adapter);
4458         if (adapter->has_cluster) {
4459                 dev_notice(&pdev->dev,
4460                         "Cluster driver, initiator id:%d\n",
4461                         adapter->this_id);
4462         }
4463 #endif
4464
4465         pci_set_drvdata(pdev, host);
4466
4467         mega_create_proc_entry(hba_count, mega_proc_dir_entry);
4468
4469         error = scsi_add_host(host, &pdev->dev);
4470         if (error)
4471                 goto out_free_mbox;
4472
4473         scsi_scan_host(host);
4474         hba_count++;
4475         return 0;
4476
4477  out_free_mbox:
4478         dma_free_coherent(&adapter->dev->dev, sizeof(mbox64_t),
4479                           adapter->una_mbox64, adapter->una_mbox64_dma);
4480  out_free_irq:
4481         free_irq(adapter->host->irq, adapter);
4482  out_free_scb_list:
4483         kfree(adapter->scb_list);
4484  out_free_cmd_buffer:
4485         dma_free_coherent(&adapter->dev->dev, MEGA_BUFFER_SIZE,
4486                           adapter->mega_buffer, adapter->buf_dma_handle);
4487  out_host_put:
4488         scsi_host_put(host);
4489  out_iounmap:
4490         if (flag & BOARD_MEMMAP)
4491                 iounmap((void *)mega_baseport);
4492  out_release_region:
4493         if (flag & BOARD_MEMMAP)
4494                 release_mem_region(tbase, 128);
4495         else
4496                 release_region(mega_baseport, 16);
4497  out_disable_device:
4498         pci_disable_device(pdev);
4499  out:
4500         return error;
4501 }
4502
4503 static void
4504 __megaraid_shutdown(adapter_t *adapter)
4505 {
4506         u_char  raw_mbox[sizeof(struct mbox_out)];
4507         mbox_t  *mbox = (mbox_t *)raw_mbox;
4508         int     i;
4509
4510         /* Flush adapter cache */
4511         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4512         raw_mbox[0] = FLUSH_ADAPTER;
4513
4514         free_irq(adapter->host->irq, adapter);
4515
4516         /* Issue a blocking (interrupts disabled) command to the card */
4517         issue_scb_block(adapter, raw_mbox);
4518
4519         /* Flush disks cache */
4520         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4521         raw_mbox[0] = FLUSH_SYSTEM;
4522
4523         /* Issue a blocking (interrupts disabled) command to the card */
4524         issue_scb_block(adapter, raw_mbox);
4525
4526         if (atomic_read(&adapter->pend_cmds) > 0)
4527                 dev_warn(&adapter->dev->dev, "pending commands!!\n");
4528
4529         /*
4530          * Have a delibrate delay to make sure all the caches are
4531          * actually flushed.
4532          */
4533         for (i = 0; i <= 10; i++)
4534                 mdelay(1000);
4535 }
4536
4537 static void
4538 megaraid_remove_one(struct pci_dev *pdev)
4539 {
4540         struct Scsi_Host *host = pci_get_drvdata(pdev);
4541         adapter_t *adapter = (adapter_t *)host->hostdata;
4542         char buf[12] = { 0 };
4543
4544         scsi_remove_host(host);
4545
4546         __megaraid_shutdown(adapter);
4547
4548         /* Free our resources */
4549         if (adapter->flag & BOARD_MEMMAP) {
4550                 iounmap((void *)adapter->base);
4551                 release_mem_region(adapter->host->base, 128);
4552         } else
4553                 release_region(adapter->base, 16);
4554
4555         mega_free_sgl(adapter);
4556
4557         sprintf(buf, "hba%d", adapter->host->host_no);
4558         remove_proc_subtree(buf, mega_proc_dir_entry);
4559
4560         dma_free_coherent(&adapter->dev->dev, MEGA_BUFFER_SIZE,
4561                           adapter->mega_buffer, adapter->buf_dma_handle);
4562         kfree(adapter->scb_list);
4563         dma_free_coherent(&adapter->dev->dev, sizeof(mbox64_t),
4564                           adapter->una_mbox64, adapter->una_mbox64_dma);
4565
4566         scsi_host_put(host);
4567         pci_disable_device(pdev);
4568
4569         hba_count--;
4570 }
4571
4572 static void
4573 megaraid_shutdown(struct pci_dev *pdev)
4574 {
4575         struct Scsi_Host *host = pci_get_drvdata(pdev);
4576         adapter_t *adapter = (adapter_t *)host->hostdata;
4577
4578         __megaraid_shutdown(adapter);
4579 }
4580
4581 static struct pci_device_id megaraid_pci_tbl[] = {
4582         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID,
4583                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4584         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2,
4585                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4586         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3,
4587                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4588         {0,}
4589 };
4590 MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl);
4591
4592 static struct pci_driver megaraid_pci_driver = {
4593         .name           = "megaraid_legacy",
4594         .id_table       = megaraid_pci_tbl,
4595         .probe          = megaraid_probe_one,
4596         .remove         = megaraid_remove_one,
4597         .shutdown       = megaraid_shutdown,
4598 };
4599
4600 static int __init megaraid_init(void)
4601 {
4602         int error;
4603
4604         if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN))
4605                 max_cmd_per_lun = MAX_CMD_PER_LUN;
4606         if (max_mbox_busy_wait > MBOX_BUSY_WAIT)
4607                 max_mbox_busy_wait = MBOX_BUSY_WAIT;
4608
4609 #ifdef CONFIG_PROC_FS
4610         mega_proc_dir_entry = proc_mkdir("megaraid", NULL);
4611         if (!mega_proc_dir_entry) {
4612                 printk(KERN_WARNING
4613                                 "megaraid: failed to create megaraid root\n");
4614         }
4615 #endif
4616         error = pci_register_driver(&megaraid_pci_driver);
4617         if (error) {
4618 #ifdef CONFIG_PROC_FS
4619                 remove_proc_entry("megaraid", NULL);
4620 #endif
4621                 return error;
4622         }
4623
4624         /*
4625          * Register the driver as a character device, for applications
4626          * to access it for ioctls.
4627          * First argument (major) to register_chrdev implies a dynamic
4628          * major number allocation.
4629          */
4630         major = register_chrdev(0, "megadev_legacy", &megadev_fops);
4631         if (!major) {
4632                 printk(KERN_WARNING
4633                                 "megaraid: failed to register char device\n");
4634         }
4635
4636         return 0;
4637 }
4638
4639 static void __exit megaraid_exit(void)
4640 {
4641         /*
4642          * Unregister the character device interface to the driver.
4643          */
4644         unregister_chrdev(major, "megadev_legacy");
4645
4646         pci_unregister_driver(&megaraid_pci_driver);
4647
4648 #ifdef CONFIG_PROC_FS
4649         remove_proc_entry("megaraid", NULL);
4650 #endif
4651 }
4652
4653 module_init(megaraid_init);
4654 module_exit(megaraid_exit);
4655
4656 /* vi: set ts=8 sw=8 tw=78: */