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
  48 #include <scsi/scsi.h>
  49 #include <scsi/scsi_cmnd.h>
  50 #include <scsi/scsi_device.h>
  51 #include <scsi/scsi_eh.h>
  52 #include <scsi/scsi_host.h>
  53 #include <scsi/scsi_tcq.h>
  54 #include <scsi/scsicam.h>
  55
  56 #include "megaraid.h"
  57
  58 #define MEGARAID_MODULE_VERSION "2.00.4"
  59
  60 MODULE_AUTHOR ("sju@lsil.com");
  61 MODULE_DESCRIPTION ("LSI Logic MegaRAID legacy driver");
  62 MODULE_LICENSE ("GPL");
  63 MODULE_VERSION(MEGARAID_MODULE_VERSION);
  64
  65 static DEFINE_MUTEX(megadev_mutex);
  66 static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
  67 module_param(max_cmd_per_lun, uint, 0);
  68 MODULE_PARM_DESC(max_cmd_per_lun, "Maximum number of commands which can be issued to a single LUN (default=DEF_CMD_PER_LUN=63)");
  69
  70 static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO;
  71 module_param(max_sectors_per_io, ushort, 0);
  72 MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)");
  73
  74
  75 static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT;
  76 module_param(max_mbox_busy_wait, ushort, 0);
  77 MODULE_PARM_DESC(max_mbox_busy_wait, "Maximum wait for mailbox in microseconds if busy (default=MBOX_BUSY_WAIT=10)");
  78
  79 #define RDINDOOR(adapter)       readl((adapter)->mmio_base + 0x20)
  80 #define RDOUTDOOR(adapter)      readl((adapter)->mmio_base + 0x2C)
  81 #define WRINDOOR(adapter,value)  writel(value, (adapter)->mmio_base + 0x20)
  82 #define WROUTDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x2C)
  83
  84 /*
  85  * Global variables
  86  */
  87
  88 static int hba_count;
  89 static adapter_t *hba_soft_state[MAX_CONTROLLERS];
  90 static struct proc_dir_entry *mega_proc_dir_entry;
  91
  92 /* For controller re-ordering */
  93 static struct mega_hbas mega_hbas[MAX_CONTROLLERS];
  94
  95 static long
  96 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
  97
  98 /*
  99  * The File Operations structure for the serial/ioctl interface of the driver
 100  */
 101 static const struct file_operations megadev_fops = {
 102         .owner          = THIS_MODULE,
 103         .unlocked_ioctl = megadev_unlocked_ioctl,
 104         .open           = megadev_open,
 105         .llseek         = noop_llseek,
 106 };
 107
 108 /*
 109  * Array to structures for storing the information about the controllers. This
 110  * information is sent to the user level applications, when they do an ioctl
 111  * for this information.
 112  */
 113 static struct mcontroller mcontroller[MAX_CONTROLLERS];
 114
 115 /* The current driver version */
 116 static u32 driver_ver = 0x02000000;
 117
 118 /* major number used by the device for character interface */
 119 static int major;
 120
 121 #define IS_RAID_CH(hba, ch)     (((hba)->mega_ch_class >> (ch)) & 0x01)
 122
 123
 124 /*
 125  * Debug variable to print some diagnostic messages
 126  */
 127 static int trace_level;
 128
 129 /**
 130  * mega_setup_mailbox()
 131  * @adapter: pointer to our soft state
 132  *
 133  * Allocates a 8 byte aligned memory for the handshake mailbox.
 134  */
 135 static int
 136 mega_setup_mailbox(adapter_t *adapter)
 137 {
 138         unsigned long   align;
 139
 140         adapter->una_mbox64 = dma_alloc_coherent(&adapter->dev->dev,
 141                                                  sizeof(mbox64_t),
 142                                                  &adapter->una_mbox64_dma,
 143                                                  GFP_KERNEL);
 144
 145         if( !adapter->una_mbox64 ) return -1;
 146
 147         adapter->mbox = &adapter->una_mbox64->mbox;
 148
 149         adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) &
 150                         (~0UL ^ 0xFUL));
 151
 152         adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8);
 153
 154         align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox);
 155
 156         adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align;
 157
 158         /*
 159          * Register the mailbox if the controller is an io-mapped controller
 160          */
 161         if( adapter->flag & BOARD_IOMAP ) {
 162
 163                 outb(adapter->mbox_dma & 0xFF,
 164                                 adapter->host->io_port + MBOX_PORT0);
 165
 166                 outb((adapter->mbox_dma >> 8) & 0xFF,
 167                                 adapter->host->io_port + MBOX_PORT1);
 168
 169                 outb((adapter->mbox_dma >> 16) & 0xFF,
 170                                 adapter->host->io_port + MBOX_PORT2);
 171
 172                 outb((adapter->mbox_dma >> 24) & 0xFF,
 173                                 adapter->host->io_port + MBOX_PORT3);
 174
 175                 outb(ENABLE_MBOX_BYTE,
 176                                 adapter->host->io_port + ENABLE_MBOX_REGION);
 177
 178                 irq_ack(adapter);
 179
 180                 irq_enable(adapter);
 181         }
 182
 183         return 0;
 184 }
 185
 186
 187 /*
 188  * mega_query_adapter()
 189  * @adapter - pointer to our soft state
 190  *
 191  * Issue the adapter inquiry commands to the controller and find out
 192  * information and parameter about the devices attached
 193  */
 194 static int
 195 mega_query_adapter(adapter_t *adapter)
 196 {
 197         dma_addr_t      prod_info_dma_handle;
 198         mega_inquiry3   *inquiry3;
 199         struct mbox_out mbox;
 200         u8      *raw_mbox = (u8 *)&mbox;
 201         int     retval;
 202
 203         /* Initialize adapter inquiry mailbox */
 204
 205         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
 206         memset(&mbox, 0, sizeof(mbox));
 207
 208         /*
 209          * Try to issue Inquiry3 command
 210          * if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
 211          * update enquiry3 structure
 212          */
 213         mbox.xferaddr = (u32)adapter->buf_dma_handle;
 214
 215         inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;
 216
 217         raw_mbox[0] = FC_NEW_CONFIG;            /* i.e. mbox->cmd=0xA1 */
 218         raw_mbox[2] = NC_SUBOP_ENQUIRY3;        /* i.e. 0x0F */
 219         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;  /* i.e. 0x02 */
 220
 221         /* Issue a blocking command to the card */
 222         if (issue_scb_block(adapter, raw_mbox)) {
 223                 /* the adapter does not support 40ld */
 224
 225                 mraid_ext_inquiry       *ext_inq;
 226                 mraid_inquiry           *inq;
 227                 dma_addr_t              dma_handle;
 228
 229                 ext_inq = dma_alloc_coherent(&adapter->dev->dev,
 230                                              sizeof(mraid_ext_inquiry),
 231                                              &dma_handle, GFP_KERNEL);
 232
 233                 if( ext_inq == NULL ) return -1;
 234
 235                 inq = &ext_inq->raid_inq;
 236
 237                 mbox.xferaddr = (u32)dma_handle;
 238
 239                 /*issue old 0x04 command to adapter */
 240                 mbox.cmd = MEGA_MBOXCMD_ADPEXTINQ;
 241
 242                 issue_scb_block(adapter, raw_mbox);
 243
 244                 /*
 245                  * update Enquiry3 and ProductInfo structures with
 246                  * mraid_inquiry structure
 247                  */
 248                 mega_8_to_40ld(inq, inquiry3,
 249                                 (mega_product_info *)&adapter->product_info);
 250
 251                 dma_free_coherent(&adapter->dev->dev,
 252                                   sizeof(mraid_ext_inquiry), ext_inq,
 253                                   dma_handle);
 254
 255         } else {                /*adapter supports 40ld */
 256                 adapter->flag |= BOARD_40LD;
 257
 258                 /*
 259                  * get product_info, which is static information and will be
 260                  * unchanged
 261                  */
 262                 prod_info_dma_handle = dma_map_single(&adapter->dev->dev,
 263                                                       (void *)&adapter->product_info,
 264                                                       sizeof(mega_product_info),
 265                                                       DMA_FROM_DEVICE);
 266
 267                 mbox.xferaddr = prod_info_dma_handle;
 268
 269                 raw_mbox[0] = FC_NEW_CONFIG;    /* i.e. mbox->cmd=0xA1 */
 270                 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;    /* i.e. 0x0E */
 271
 272                 if ((retval = issue_scb_block(adapter, raw_mbox)))
 273                         dev_warn(&adapter->dev->dev,
 274                                 "Product_info cmd failed with error: %d\n",
 275                                 retval);
 276
 277                 dma_unmap_single(&adapter->dev->dev, prod_info_dma_handle,
 278                                  sizeof(mega_product_info), DMA_FROM_DEVICE);
 279         }
 280
 281
 282         /*
 283          * kernel scans the channels from 0 to <= max_channel
 284          */
 285         adapter->host->max_channel =
 286                 adapter->product_info.nchannels + NVIRT_CHAN -1;
 287
 288         adapter->host->max_id = 16;     /* max targets per channel */
 289
 290         adapter->host->max_lun = 7;     /* Up to 7 luns for non disk devices */
 291
 292         adapter->host->cmd_per_lun = max_cmd_per_lun;
 293
 294         adapter->numldrv = inquiry3->num_ldrv;
 295
 296         adapter->max_cmds = adapter->product_info.max_commands;
 297
 298         if(adapter->max_cmds > MAX_COMMANDS)
 299                 adapter->max_cmds = MAX_COMMANDS;
 300
 301         adapter->host->can_queue = adapter->max_cmds - 1;
 302
 303         /*
 304          * Get the maximum number of scatter-gather elements supported by this
 305          * firmware
 306          */
 307         mega_get_max_sgl(adapter);
 308
 309         adapter->host->sg_tablesize = adapter->sglen;
 310
 311         /* use HP firmware and bios version encoding
 312            Note: fw_version[0|1] and bios_version[0|1] were originally shifted
 313            right 8 bits making them zero. This 0 value was hardcoded to fix
 314            sparse warnings. */
 315         if (adapter->product_info.subsysvid == PCI_VENDOR_ID_HP) {
 316                 snprintf(adapter->fw_version, sizeof(adapter->fw_version),
 317                          "%c%d%d.%d%d",
 318                          adapter->product_info.fw_version[2],
 319                          0,
 320                          adapter->product_info.fw_version[1] & 0x0f,
 321                          0,
 322                          adapter->product_info.fw_version[0] & 0x0f);
 323                 snprintf(adapter->bios_version, sizeof(adapter->fw_version),
 324                          "%c%d%d.%d%d",
 325                          adapter->product_info.bios_version[2],
 326                          0,
 327                          adapter->product_info.bios_version[1] & 0x0f,
 328                          0,
 329                          adapter->product_info.bios_version[0] & 0x0f);
 330         } else {
 331                 memcpy(adapter->fw_version,
 332                                 (char *)adapter->product_info.fw_version, 4);
 333                 adapter->fw_version[4] = 0;
 334
 335                 memcpy(adapter->bios_version,
 336                                 (char *)adapter->product_info.bios_version, 4);
 337
 338                 adapter->bios_version[4] = 0;
 339         }
 340
 341         dev_notice(&adapter->dev->dev, "[%s:%s] detected %d logical drives\n",
 342                 adapter->fw_version, adapter->bios_version, adapter->numldrv);
 343
 344         /*
 345          * Do we support extended (>10 bytes) cdbs
 346          */
 347         adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
 348         if (adapter->support_ext_cdb)
 349                 dev_notice(&adapter->dev->dev, "supports extended CDBs\n");
 350
 351
 352         return 0;
 353 }
 354
 355 /**
 356  * mega_runpendq()
 357  * @adapter: pointer to our soft state
 358  *
 359  * Runs through the list of pending requests.
 360  */
 361 static inline void
 362 mega_runpendq(adapter_t *adapter)
 363 {
 364         if(!list_empty(&adapter->pending_list))
 365                 __mega_runpendq(adapter);
 366 }
 367
 368 /*
 369  * megaraid_queue()
 370  * @scmd - Issue this scsi command
 371  * @done - the callback hook into the scsi mid-layer
 372  *
 373  * The command queuing entry point for the mid-layer.
 374  */
 375 static int megaraid_queue_lck(struct scsi_cmnd *scmd)
 376 {
 377         adapter_t       *adapter;
 378         scb_t   *scb;
 379         int     busy=0;
 380         unsigned long flags;
 381
 382         adapter = (adapter_t *)scmd->device->host->hostdata;
 383
 384         /*
 385          * Allocate and build a SCB request
 386          * busy flag will be set if mega_build_cmd() command could not
 387          * allocate scb. We will return non-zero status in that case.
 388          * NOTE: scb can be null even though certain commands completed
 389          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, we would
 390          * return 0 in that case.
 391          */
 392
 393         spin_lock_irqsave(&adapter->lock, flags);
 394         scb = mega_build_cmd(adapter, scmd, &busy);
 395         if (!scb)
 396                 goto out;
 397
 398         scb->state |= SCB_PENDQ;
 399         list_add_tail(&scb->list, &adapter->pending_list);
 400
 401         /*
 402          * Check if the HBA is in quiescent state, e.g., during a
 403          * delete logical drive opertion. If it is, don't run
 404          * the pending_list.
 405          */
 406         if (atomic_read(&adapter->quiescent) == 0)
 407                 mega_runpendq(adapter);
 408
 409         busy = 0;
 410  out:
 411         spin_unlock_irqrestore(&adapter->lock, flags);
 412         return busy;
 413 }
 414
 415 static DEF_SCSI_QCMD(megaraid_queue)
 416
 417 /**
 418  * mega_allocate_scb()
 419  * @adapter: pointer to our soft state
 420  * @cmd: scsi command from the mid-layer
 421  *
 422  * Allocate a SCB structure. This is the central structure for controller
 423  * commands.
 424  */
 425 static inline scb_t *
 426 mega_allocate_scb(adapter_t *adapter, struct scsi_cmnd *cmd)
 427 {
 428         struct list_head *head = &adapter->free_list;
 429         scb_t   *scb;
 430
 431         /* Unlink command from Free List */
 432         if( !list_empty(head) ) {
 433
 434                 scb = list_entry(head->next, scb_t, list);
 435
 436                 list_del_init(head->next);
 437
 438                 scb->state = SCB_ACTIVE;
 439                 scb->cmd = cmd;
 440                 scb->dma_type = MEGA_DMA_TYPE_NONE;
 441
 442                 return scb;
 443         }
 444
 445         return NULL;
 446 }
 447
 448 /**
 449  * mega_get_ldrv_num()
 450  * @adapter: pointer to our soft state
 451  * @cmd: scsi mid layer command
 452  * @channel: channel on the controller
 453  *
 454  * Calculate the logical drive number based on the information in scsi command
 455  * and the channel number.
 456  */
 457 static inline int
 458 mega_get_ldrv_num(adapter_t *adapter, struct scsi_cmnd *cmd, int channel)
 459 {
 460         int             tgt;
 461         int             ldrv_num;
 462
 463         tgt = cmd->device->id;
 464
 465         if ( tgt > adapter->this_id )
 466                 tgt--;  /* we do not get inquires for initiator id */
 467
 468         ldrv_num = (channel * 15) + tgt;
 469
 470
 471         /*
 472          * If we have a logical drive with boot enabled, project it first
 473          */
 474         if( adapter->boot_ldrv_enabled ) {
 475                 if( ldrv_num == 0 ) {
 476                         ldrv_num = adapter->boot_ldrv;
 477                 }
 478                 else {
 479                         if( ldrv_num <= adapter->boot_ldrv ) {
 480                                 ldrv_num--;
 481                         }
 482                 }
 483         }
 484
 485         /*
 486          * If "delete logical drive" feature is enabled on this controller.
 487          * Do only if at least one delete logical drive operation was done.
 488          *
 489          * Also, after logical drive deletion, instead of logical drive number,
 490          * the value returned should be 0x80+logical drive id.
 491          *
 492          * These is valid only for IO commands.
 493          */
 494
 495         if (adapter->support_random_del && adapter->read_ldidmap )
 496                 switch (cmd->cmnd[0]) {
 497                 case READ_6:
 498                 case WRITE_6:
 499                 case READ_10:
 500                 case WRITE_10:
 501                         ldrv_num += 0x80;
 502                 }
 503
 504         return ldrv_num;
 505 }
 506
 507 /**
 508  * mega_build_cmd()
 509  * @adapter: pointer to our soft state
 510  * @cmd: Prepare using this scsi command
 511  * @busy: busy flag if no resources
 512  *
 513  * Prepares a command and scatter gather list for the controller. This routine
 514  * also finds out if the commands is intended for a logical drive or a
 515  * physical device and prepares the controller command accordingly.
 516  *
 517  * We also re-order the logical drives and physical devices based on their
 518  * boot settings.
 519  */
 520 static scb_t *
 521 mega_build_cmd(adapter_t *adapter, struct scsi_cmnd *cmd, int *busy)
 522 {
 523         mega_passthru   *pthru;
 524         scb_t   *scb;
 525         mbox_t  *mbox;
 526         u32     seg;
 527         char    islogical;
 528         int     max_ldrv_num;
 529         int     channel = 0;
 530         int     target = 0;
 531         int     ldrv_num = 0;   /* logical drive number */
 532
 533         /*
 534          * We know what channels our logical drives are on - mega_find_card()
 535          */
 536         islogical = adapter->logdrv_chan[cmd->device->channel];
 537
 538         /*
 539          * The theory: If physical drive is chosen for boot, all the physical
 540          * devices are exported before the logical drives, otherwise physical
 541          * devices are pushed after logical drives, in which case - Kernel sees
 542          * the physical devices on virtual channel which is obviously converted
 543          * to actual channel on the HBA.
 544          */
 545         if( adapter->boot_pdrv_enabled ) {
 546                 if( islogical ) {
 547                         /* logical channel */
 548                         channel = cmd->device->channel -
 549                                 adapter->product_info.nchannels;
 550                 }
 551                 else {
 552                         /* this is physical channel */
 553                         channel = cmd->device->channel;
 554                         target = cmd->device->id;
 555
 556                         /*
 557                          * boot from a physical disk, that disk needs to be
 558                          * exposed first IF both the channels are SCSI, then
 559                          * booting from the second channel is not allowed.
 560                          */
 561                         if( target == 0 ) {
 562                                 target = adapter->boot_pdrv_tgt;
 563                         }
 564                         else if( target == adapter->boot_pdrv_tgt ) {
 565                                 target = 0;
 566                         }
 567                 }
 568         }
 569         else {
 570                 if( islogical ) {
 571                         /* this is the logical channel */
 572                         channel = cmd->device->channel;
 573                 }
 574                 else {
 575                         /* physical channel */
 576                         channel = cmd->device->channel - NVIRT_CHAN;
 577                         target = cmd->device->id;
 578                 }
 579         }
 580
 581
 582         if(islogical) {
 583
 584                 /* have just LUN 0 for each target on virtual channels */
 585                 if (cmd->device->lun) {
 586                         cmd->result = (DID_BAD_TARGET << 16);
 587                         scsi_done(cmd);
 588                         return NULL;
 589                 }
 590
 591                 ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);
 592
 593
 594                 max_ldrv_num = (adapter->flag & BOARD_40LD) ?
 595                         MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;
 596
 597                 /*
 598                  * max_ldrv_num increases by 0x80 if some logical drive was
 599                  * deleted.
 600                  */
 601                 if(adapter->read_ldidmap)
 602                         max_ldrv_num += 0x80;
 603
 604                 if(ldrv_num > max_ldrv_num ) {
 605                         cmd->result = (DID_BAD_TARGET << 16);
 606                         scsi_done(cmd);
 607                         return NULL;
 608                 }
 609
 610         }
 611         else {
 612                 if( cmd->device->lun > 7) {
 613                         /*
 614                          * Do not support lun >7 for physically accessed
 615                          * devices
 616                          */
 617                         cmd->result = (DID_BAD_TARGET << 16);
 618                         scsi_done(cmd);
 619                         return NULL;
 620                 }
 621         }
 622
 623         /*
 624          *
 625          * Logical drive commands
 626          *
 627          */
 628         if(islogical) {
 629                 switch (cmd->cmnd[0]) {
 630                 case TEST_UNIT_READY:
 631 #if MEGA_HAVE_CLUSTERING
 632                         /*
 633                          * Do we support clustering and is the support enabled
 634                          * If no, return success always
 635                          */
 636                         if( !adapter->has_cluster ) {
 637                                 cmd->result = (DID_OK << 16);
 638                                 scsi_done(cmd);
 639                                 return NULL;
 640                         }
 641
 642                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 643                                 *busy = 1;
 644                                 return NULL;
 645                         }
 646
 647                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 648                         scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
 649                         scb->raw_mbox[3] = ldrv_num;
 650
 651                         scb->dma_direction = DMA_NONE;
 652
 653                         return scb;
 654 #else
 655                         cmd->result = (DID_OK << 16);
 656                         scsi_done(cmd);
 657                         return NULL;
 658 #endif
 659
 660                 case MODE_SENSE: {
 661                         char *buf;
 662                         struct scatterlist *sg;
 663
 664                         sg = scsi_sglist(cmd);
 665                         buf = kmap_atomic(sg_page(sg)) + sg->offset;
 666
 667                         memset(buf, 0, cmd->cmnd[4]);
 668                         kunmap_atomic(buf - sg->offset);
 669
 670                         cmd->result = (DID_OK << 16);
 671                         scsi_done(cmd);
 672                         return NULL;
 673                 }
 674
 675                 case READ_CAPACITY:
 676                 case INQUIRY:
 677
 678                         if(!(adapter->flag & (1L << cmd->device->channel))) {
 679
 680                                 dev_notice(&adapter->dev->dev,
 681                                         "scsi%d: scanning scsi channel %d "
 682                                         "for logical drives\n",
 683                                                 adapter->host->host_no,
 684                                                 cmd->device->channel);
 685
 686                                 adapter->flag |= (1L << cmd->device->channel);
 687                         }
 688
 689                         /* Allocate a SCB and initialize passthru */
 690                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 691                                 *busy = 1;
 692                                 return NULL;
 693                         }
 694                         pthru = scb->pthru;
 695
 696                         mbox = (mbox_t *)scb->raw_mbox;
 697                         memset(mbox, 0, sizeof(scb->raw_mbox));
 698                         memset(pthru, 0, sizeof(mega_passthru));
 699
 700                         pthru->timeout = 0;
 701                         pthru->ars = 1;
 702                         pthru->reqsenselen = 14;
 703                         pthru->islogical = 1;
 704                         pthru->logdrv = ldrv_num;
 705                         pthru->cdblen = cmd->cmd_len;
 706                         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 707
 708                         if( adapter->has_64bit_addr ) {
 709                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 710                         }
 711                         else {
 712                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 713                         }
 714
 715                         scb->dma_direction = DMA_FROM_DEVICE;
 716
 717                         pthru->numsgelements = mega_build_sglist(adapter, scb,
 718                                 &pthru->dataxferaddr, &pthru->dataxferlen);
 719
 720                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 721
 722                         return scb;
 723
 724                 case READ_6:
 725                 case WRITE_6:
 726                 case READ_10:
 727                 case WRITE_10:
 728                 case READ_12:
 729                 case WRITE_12:
 730
 731                         /* Allocate a SCB and initialize mailbox */
 732                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 733                                 *busy = 1;
 734                                 return NULL;
 735                         }
 736                         mbox = (mbox_t *)scb->raw_mbox;
 737
 738                         memset(mbox, 0, sizeof(scb->raw_mbox));
 739                         mbox->m_out.logdrv = ldrv_num;
 740
 741                         /*
 742                          * A little hack: 2nd bit is zero for all scsi read
 743                          * commands and is set for all scsi write commands
 744                          */
 745                         if( adapter->has_64bit_addr ) {
 746                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 747                                         MEGA_MBOXCMD_LWRITE64:
 748                                         MEGA_MBOXCMD_LREAD64 ;
 749                         }
 750                         else {
 751                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 752                                         MEGA_MBOXCMD_LWRITE:
 753                                         MEGA_MBOXCMD_LREAD ;
 754                         }
 755
 756                         /*
 757                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
 758                          */
 759                         if( cmd->cmd_len == 6 ) {
 760                                 mbox->m_out.numsectors = (u32) cmd->cmnd[4];
 761                                 mbox->m_out.lba =
 762                                         ((u32)cmd->cmnd[1] << 16) |
 763                                         ((u32)cmd->cmnd[2] << 8) |
 764                                         (u32)cmd->cmnd[3];
 765
 766                                 mbox->m_out.lba &= 0x1FFFFF;
 767
 768 #if MEGA_HAVE_STATS
 769                                 /*
 770                                  * Take modulo 0x80, since the logical drive
 771                                  * number increases by 0x80 when a logical
 772                                  * drive was deleted
 773                                  */
 774                                 if (*cmd->cmnd == READ_6) {
 775                                         adapter->nreads[ldrv_num%0x80]++;
 776                                         adapter->nreadblocks[ldrv_num%0x80] +=
 777                                                 mbox->m_out.numsectors;
 778                                 } else {
 779                                         adapter->nwrites[ldrv_num%0x80]++;
 780                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 781                                                 mbox->m_out.numsectors;
 782                                 }
 783 #endif
 784                         }
 785
 786                         /*
 787                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
 788                          */
 789                         if( cmd->cmd_len == 10 ) {
 790                                 mbox->m_out.numsectors =
 791                                         (u32)cmd->cmnd[8] |
 792                                         ((u32)cmd->cmnd[7] << 8);
 793                                 mbox->m_out.lba =
 794                                         ((u32)cmd->cmnd[2] << 24) |
 795                                         ((u32)cmd->cmnd[3] << 16) |
 796                                         ((u32)cmd->cmnd[4] << 8) |
 797                                         (u32)cmd->cmnd[5];
 798
 799 #if MEGA_HAVE_STATS
 800                                 if (*cmd->cmnd == READ_10) {
 801                                         adapter->nreads[ldrv_num%0x80]++;
 802                                         adapter->nreadblocks[ldrv_num%0x80] +=
 803                                                 mbox->m_out.numsectors;
 804                                 } else {
 805                                         adapter->nwrites[ldrv_num%0x80]++;
 806                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 807                                                 mbox->m_out.numsectors;
 808                                 }
 809 #endif
 810                         }
 811
 812                         /*
 813                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
 814                          */
 815                         if( cmd->cmd_len == 12 ) {
 816                                 mbox->m_out.lba =
 817                                         ((u32)cmd->cmnd[2] << 24) |
 818                                         ((u32)cmd->cmnd[3] << 16) |
 819                                         ((u32)cmd->cmnd[4] << 8) |
 820                                         (u32)cmd->cmnd[5];
 821
 822                                 mbox->m_out.numsectors =
 823                                         ((u32)cmd->cmnd[6] << 24) |
 824                                         ((u32)cmd->cmnd[7] << 16) |
 825                                         ((u32)cmd->cmnd[8] << 8) |
 826                                         (u32)cmd->cmnd[9];
 827
 828 #if MEGA_HAVE_STATS
 829                                 if (*cmd->cmnd == READ_12) {
 830                                         adapter->nreads[ldrv_num%0x80]++;
 831                                         adapter->nreadblocks[ldrv_num%0x80] +=
 832                                                 mbox->m_out.numsectors;
 833                                 } else {
 834                                         adapter->nwrites[ldrv_num%0x80]++;
 835                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 836                                                 mbox->m_out.numsectors;
 837                                 }
 838 #endif
 839                         }
 840
 841                         /*
 842                          * If it is a read command
 843                          */
 844                         if( (*cmd->cmnd & 0x0F) == 0x08 ) {
 845                                 scb->dma_direction = DMA_FROM_DEVICE;
 846                         }
 847                         else {
 848                                 scb->dma_direction = DMA_TO_DEVICE;
 849                         }
 850
 851                         /* Calculate Scatter-Gather info */
 852                         mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
 853                                         (u32 *)&mbox->m_out.xferaddr, &seg);
 854
 855                         return scb;
 856
 857 #if MEGA_HAVE_CLUSTERING
 858                 case RESERVE:
 859                 case RELEASE:
 860
 861                         /*
 862                          * Do we support clustering and is the support enabled
 863                          */
 864                         if( ! adapter->has_cluster ) {
 865
 866                                 cmd->result = (DID_BAD_TARGET << 16);
 867                                 scsi_done(cmd);
 868                                 return NULL;
 869                         }
 870
 871                         /* Allocate a SCB and initialize mailbox */
 872                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 873                                 *busy = 1;
 874                                 return NULL;
 875                         }
 876
 877                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 878                         scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
 879                                 MEGA_RESERVE_LD : MEGA_RELEASE_LD;
 880
 881                         scb->raw_mbox[3] = ldrv_num;
 882
 883                         scb->dma_direction = DMA_NONE;
 884
 885                         return scb;
 886 #endif
 887
 888                 default:
 889                         cmd->result = (DID_BAD_TARGET << 16);
 890                         scsi_done(cmd);
 891                         return NULL;
 892                 }
 893         }
 894
 895         /*
 896          * Passthru drive commands
 897          */
 898         else {
 899                 /* Allocate a SCB and initialize passthru */
 900                 if(!(scb = mega_allocate_scb(adapter, cmd))) {
 901                         *busy = 1;
 902                         return NULL;
 903                 }
 904
 905                 mbox = (mbox_t *)scb->raw_mbox;
 906                 memset(mbox, 0, sizeof(scb->raw_mbox));
 907
 908                 if( adapter->support_ext_cdb ) {
 909
 910                         mega_prepare_extpassthru(adapter, scb, cmd,
 911                                         channel, target);
 912
 913                         mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;
 914
 915                         mbox->m_out.xferaddr = scb->epthru_dma_addr;
 916
 917                 }
 918                 else {
 919
 920                         pthru = mega_prepare_passthru(adapter, scb, cmd,
 921                                         channel, target);
 922
 923                         /* Initialize mailbox */
 924                         if( adapter->has_64bit_addr ) {
 925                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 926                         }
 927                         else {
 928                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 929                         }
 930
 931                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 932
 933                 }
 934                 return scb;
 935         }
 936         return NULL;
 937 }
 938
 939
 940 /**
 941  * mega_prepare_passthru()
 942  * @adapter: pointer to our soft state
 943  * @scb: our scsi control block
 944  * @cmd: scsi command from the mid-layer
 945  * @channel: actual channel on the controller
 946  * @target: actual id on the controller.
 947  *
 948  * prepare a command for the scsi physical devices.
 949  */
 950 static mega_passthru *
 951 mega_prepare_passthru(adapter_t *adapter, scb_t *scb, struct scsi_cmnd *cmd,
 952                       int channel, int target)
 953 {
 954         mega_passthru *pthru;
 955
 956         pthru = scb->pthru;
 957         memset(pthru, 0, sizeof (mega_passthru));
 958
 959         /* 0=6sec/1=60sec/2=10min/3=3hrs */
 960         pthru->timeout = 2;
 961
 962         pthru->ars = 1;
 963         pthru->reqsenselen = 14;
 964         pthru->islogical = 0;
 965
 966         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
 967
 968         pthru->target = (adapter->flag & BOARD_40LD) ?
 969                 (channel << 4) | target : target;
 970
 971         pthru->cdblen = cmd->cmd_len;
 972         pthru->logdrv = cmd->device->lun;
 973
 974         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 975
 976         /* Not sure about the direction */
 977         scb->dma_direction = DMA_BIDIRECTIONAL;
 978
 979         /* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
 980         switch (cmd->cmnd[0]) {
 981         case INQUIRY:
 982         case READ_CAPACITY:
 983                 if(!(adapter->flag & (1L << cmd->device->channel))) {
 984
 985                         dev_notice(&adapter->dev->dev,
 986                                 "scsi%d: scanning scsi channel %d [P%d] "
 987                                 "for physical devices\n",
 988                                         adapter->host->host_no,
 989                                         cmd->device->channel, channel);
 990
 991                         adapter->flag |= (1L << cmd->device->channel);
 992                 }
 993                 fallthrough;
 994         default:
 995                 pthru->numsgelements = mega_build_sglist(adapter, scb,
 996                                 &pthru->dataxferaddr, &pthru->dataxferlen);
 997                 break;
 998         }
 999         return pthru;
1000 }
1001
1002
1003 /**
1004  * mega_prepare_extpassthru()
1005  * @adapter: pointer to our soft state
1006  * @scb: our scsi control block
1007  * @cmd: scsi command from the mid-layer
1008  * @channel: actual channel on the controller
1009  * @target: actual id on the controller.
1010  *
1011  * prepare a command for the scsi physical devices. This rountine prepares
1012  * commands for devices which can take extended CDBs (>10 bytes)
1013  */
1014 static mega_ext_passthru *
1015 mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb,
1016                          struct scsi_cmnd *cmd,
1017                          int channel, int target)
1018 {
1019         mega_ext_passthru       *epthru;
1020
1021         epthru = scb->epthru;
1022         memset(epthru, 0, sizeof(mega_ext_passthru));
1023
1024         /* 0=6sec/1=60sec/2=10min/3=3hrs */
1025         epthru->timeout = 2;
1026
1027         epthru->ars = 1;
1028         epthru->reqsenselen = 14;
1029         epthru->islogical = 0;
1030
1031         epthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
1032         epthru->target = (adapter->flag & BOARD_40LD) ?
1033                 (channel << 4) | target : target;
1034
1035         epthru->cdblen = cmd->cmd_len;
1036         epthru->logdrv = cmd->device->lun;
1037
1038         memcpy(epthru->cdb, cmd->cmnd, cmd->cmd_len);
1039
1040         /* Not sure about the direction */
1041         scb->dma_direction = DMA_BIDIRECTIONAL;
1042
1043         switch(cmd->cmnd[0]) {
1044         case INQUIRY:
1045         case READ_CAPACITY:
1046                 if(!(adapter->flag & (1L << cmd->device->channel))) {
1047
1048                         dev_notice(&adapter->dev->dev,
1049                                 "scsi%d: scanning scsi channel %d [P%d] "
1050                                 "for physical devices\n",
1051                                         adapter->host->host_no,
1052                                         cmd->device->channel, channel);
1053
1054                         adapter->flag |= (1L << cmd->device->channel);
1055                 }
1056                 fallthrough;
1057         default:
1058                 epthru->numsgelements = mega_build_sglist(adapter, scb,
1059                                 &epthru->dataxferaddr, &epthru->dataxferlen);
1060                 break;
1061         }
1062
1063         return epthru;
1064 }
1065
1066 static void
1067 __mega_runpendq(adapter_t *adapter)
1068 {
1069         scb_t *scb;
1070         struct list_head *pos, *next;
1071
1072         /* Issue any pending commands to the card */
1073         list_for_each_safe(pos, next, &adapter->pending_list) {
1074
1075                 scb = list_entry(pos, scb_t, list);
1076
1077                 if( !(scb->state & SCB_ISSUED) ) {
1078
1079                         if( issue_scb(adapter, scb) != 0 )
1080                                 return;
1081                 }
1082         }
1083
1084         return;
1085 }
1086
1087
1088 /**
1089  * issue_scb()
1090  * @adapter: pointer to our soft state
1091  * @scb: scsi control block
1092  *
1093  * Post a command to the card if the mailbox is available, otherwise return
1094  * busy. We also take the scb from the pending list if the mailbox is
1095  * available.
1096  */
1097 static int
1098 issue_scb(adapter_t *adapter, scb_t *scb)
1099 {
1100         volatile mbox64_t       *mbox64 = adapter->mbox64;
1101         volatile mbox_t         *mbox = adapter->mbox;
1102         unsigned int    i = 0;
1103
1104         if(unlikely(mbox->m_in.busy)) {
1105                 do {
1106                         udelay(1);
1107                         i++;
1108                 } while( mbox->m_in.busy && (i < max_mbox_busy_wait) );
1109
1110                 if(mbox->m_in.busy) return -1;
1111         }
1112
1113         /* Copy mailbox data into host structure */
1114         memcpy((char *)&mbox->m_out, (char *)scb->raw_mbox,
1115                         sizeof(struct mbox_out));
1116
1117         mbox->m_out.cmdid = scb->idx;   /* Set cmdid */
1118         mbox->m_in.busy = 1;            /* Set busy */
1119
1120
1121         /*
1122          * Increment the pending queue counter
1123          */
1124         atomic_inc(&adapter->pend_cmds);
1125
1126         switch (mbox->m_out.cmd) {
1127         case MEGA_MBOXCMD_LREAD64:
1128         case MEGA_MBOXCMD_LWRITE64:
1129         case MEGA_MBOXCMD_PASSTHRU64:
1130         case MEGA_MBOXCMD_EXTPTHRU:
1131                 mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1132                 mbox64->xfer_segment_hi = 0;
1133                 mbox->m_out.xferaddr = 0xFFFFFFFF;
1134                 break;
1135         default:
1136                 mbox64->xfer_segment_lo = 0;
1137                 mbox64->xfer_segment_hi = 0;
1138         }
1139
1140         /*
1141          * post the command
1142          */
1143         scb->state |= SCB_ISSUED;
1144
1145         if( likely(adapter->flag & BOARD_MEMMAP) ) {
1146                 mbox->m_in.poll = 0;
1147                 mbox->m_in.ack = 0;
1148                 WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1149         }
1150         else {
1151                 irq_enable(adapter);
1152                 issue_command(adapter);
1153         }
1154
1155         return 0;
1156 }
1157
1158 /*
1159  * Wait until the controller's mailbox is available
1160  */
1161 static inline int
1162 mega_busywait_mbox (adapter_t *adapter)
1163 {
1164         if (adapter->mbox->m_in.busy)
1165                 return __mega_busywait_mbox(adapter);
1166         return 0;
1167 }
1168
1169 /**
1170  * issue_scb_block()
1171  * @adapter: pointer to our soft state
1172  * @raw_mbox: the mailbox
1173  *
1174  * Issue a scb in synchronous and non-interrupt mode
1175  */
1176 static int
1177 issue_scb_block(adapter_t *adapter, u_char *raw_mbox)
1178 {
1179         volatile mbox64_t *mbox64 = adapter->mbox64;
1180         volatile mbox_t *mbox = adapter->mbox;
1181         u8      byte;
1182
1183         /* Wait until mailbox is free */
1184         if(mega_busywait_mbox (adapter))
1185                 goto bug_blocked_mailbox;
1186
1187         /* Copy mailbox data into host structure */
1188         memcpy((char *) mbox, raw_mbox, sizeof(struct mbox_out));
1189         mbox->m_out.cmdid = 0xFE;
1190         mbox->m_in.busy = 1;
1191
1192         switch (raw_mbox[0]) {
1193         case MEGA_MBOXCMD_LREAD64:
1194         case MEGA_MBOXCMD_LWRITE64:
1195         case MEGA_MBOXCMD_PASSTHRU64:
1196         case MEGA_MBOXCMD_EXTPTHRU:
1197                 mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1198                 mbox64->xfer_segment_hi = 0;
1199                 mbox->m_out.xferaddr = 0xFFFFFFFF;
1200                 break;
1201         default:
1202                 mbox64->xfer_segment_lo = 0;
1203                 mbox64->xfer_segment_hi = 0;
1204         }
1205
1206         if( likely(adapter->flag & BOARD_MEMMAP) ) {
1207                 mbox->m_in.poll = 0;
1208                 mbox->m_in.ack = 0;
1209                 mbox->m_in.numstatus = 0xFF;
1210                 mbox->m_in.status = 0xFF;
1211                 WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1212
1213                 while((volatile u8)mbox->m_in.numstatus == 0xFF)
1214                         cpu_relax();
1215
1216                 mbox->m_in.numstatus = 0xFF;
1217
1218                 while( (volatile u8)mbox->m_in.poll != 0x77 )
1219                         cpu_relax();
1220
1221                 mbox->m_in.poll = 0;
1222                 mbox->m_in.ack = 0x77;
1223
1224                 WRINDOOR(adapter, adapter->mbox_dma | 0x2);
1225
1226                 while(RDINDOOR(adapter) & 0x2)
1227                         cpu_relax();
1228         }
1229         else {
1230                 irq_disable(adapter);
1231                 issue_command(adapter);
1232
1233                 while (!((byte = irq_state(adapter)) & INTR_VALID))
1234                         cpu_relax();
1235
1236                 set_irq_state(adapter, byte);
1237                 irq_enable(adapter);
1238                 irq_ack(adapter);
1239         }
1240
1241         return mbox->m_in.status;
1242
1243 bug_blocked_mailbox:
1244         dev_warn(&adapter->dev->dev, "Blocked mailbox......!!\n");
1245         udelay (1000);
1246         return -1;
1247 }
1248
1249
1250 /**
1251  * megaraid_isr_iomapped()
1252  * @irq: irq
1253  * @devp: pointer to our soft state
1254  *
1255  * Interrupt service routine for io-mapped controllers.
1256  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1257  * and service the completed commands.
1258  */
1259 static irqreturn_t
1260 megaraid_isr_iomapped(int irq, void *devp)
1261 {
1262         adapter_t       *adapter = devp;
1263         unsigned long   flags;
1264         u8      status;
1265         u8      nstatus;
1266         u8      completed[MAX_FIRMWARE_STATUS];
1267         u8      byte;
1268         int     handled = 0;
1269
1270
1271         /*
1272          * loop till F/W has more commands for us to complete.
1273          */
1274         spin_lock_irqsave(&adapter->lock, flags);
1275
1276         do {
1277                 /* Check if a valid interrupt is pending */
1278                 byte = irq_state(adapter);
1279                 if( (byte & VALID_INTR_BYTE) == 0 ) {
1280                         /*
1281                          * No more pending commands
1282                          */
1283                         goto out_unlock;
1284                 }
1285                 set_irq_state(adapter, byte);
1286
1287                 while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1288                                 == 0xFF)
1289                         cpu_relax();
1290                 adapter->mbox->m_in.numstatus = 0xFF;
1291
1292                 status = adapter->mbox->m_in.status;
1293
1294                 /*
1295                  * decrement the pending queue counter
1296                  */
1297                 atomic_sub(nstatus, &adapter->pend_cmds);
1298
1299                 memcpy(completed, (void *)adapter->mbox->m_in.completed,
1300                                 nstatus);
1301
1302                 /* Acknowledge interrupt */
1303                 irq_ack(adapter);
1304
1305                 mega_cmd_done(adapter, completed, nstatus, status);
1306
1307                 mega_rundoneq(adapter);
1308
1309                 handled = 1;
1310
1311                 /* Loop through any pending requests */
1312                 if(atomic_read(&adapter->quiescent) == 0) {
1313                         mega_runpendq(adapter);
1314                 }
1315
1316         } while(1);
1317
1318  out_unlock:
1319
1320         spin_unlock_irqrestore(&adapter->lock, flags);
1321
1322         return IRQ_RETVAL(handled);
1323 }
1324
1325
1326 /**
1327  * megaraid_isr_memmapped()
1328  * @irq: irq
1329  * @devp: pointer to our soft state
1330  *
1331  * Interrupt service routine for memory-mapped controllers.
1332  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1333  * and service the completed commands.
1334  */
1335 static irqreturn_t
1336 megaraid_isr_memmapped(int irq, void *devp)
1337 {
1338         adapter_t       *adapter = devp;
1339         unsigned long   flags;
1340         u8      status;
1341         u32     dword = 0;
1342         u8      nstatus;
1343         u8      completed[MAX_FIRMWARE_STATUS];
1344         int     handled = 0;
1345
1346
1347         /*
1348          * loop till F/W has more commands for us to complete.
1349          */
1350         spin_lock_irqsave(&adapter->lock, flags);
1351
1352         do {
1353                 /* Check if a valid interrupt is pending */
1354                 dword = RDOUTDOOR(adapter);
1355                 if(dword != 0x10001234) {
1356                         /*
1357                          * No more pending commands
1358                          */
1359                         goto out_unlock;
1360                 }
1361                 WROUTDOOR(adapter, 0x10001234);
1362
1363                 while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1364                                 == 0xFF) {
1365                         cpu_relax();
1366                 }
1367                 adapter->mbox->m_in.numstatus = 0xFF;
1368
1369                 status = adapter->mbox->m_in.status;
1370
1371                 /*
1372                  * decrement the pending queue counter
1373                  */
1374                 atomic_sub(nstatus, &adapter->pend_cmds);
1375
1376                 memcpy(completed, (void *)adapter->mbox->m_in.completed,
1377                                 nstatus);
1378
1379                 /* Acknowledge interrupt */
1380                 WRINDOOR(adapter, 0x2);
1381
1382                 handled = 1;
1383
1384                 while( RDINDOOR(adapter) & 0x02 )
1385                         cpu_relax();
1386
1387                 mega_cmd_done(adapter, completed, nstatus, status);
1388
1389                 mega_rundoneq(adapter);
1390
1391                 /* Loop through any pending requests */
1392                 if(atomic_read(&adapter->quiescent) == 0) {
1393                         mega_runpendq(adapter);
1394                 }
1395
1396         } while(1);
1397
1398  out_unlock:
1399
1400         spin_unlock_irqrestore(&adapter->lock, flags);
1401
1402         return IRQ_RETVAL(handled);
1403 }
1404 /**
1405  * mega_cmd_done()
1406  * @adapter: pointer to our soft state
1407  * @completed: array of ids of completed commands
1408  * @nstatus: number of completed commands
1409  * @status: status of the last command completed
1410  *
1411  * Complete the commands and call the scsi mid-layer callback hooks.
1412  */
1413 static void
1414 mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status)
1415 {
1416         mega_ext_passthru       *epthru = NULL;
1417         struct scatterlist      *sgl;
1418         struct scsi_cmnd        *cmd = NULL;
1419         mega_passthru   *pthru = NULL;
1420         mbox_t  *mbox = NULL;
1421         u8      c;
1422         scb_t   *scb;
1423         int     islogical;
1424         int     cmdid;
1425         int     i;
1426
1427         /*
1428          * for all the commands completed, call the mid-layer callback routine
1429          * and free the scb.
1430          */
1431         for( i = 0; i < nstatus; i++ ) {
1432
1433                 cmdid = completed[i];
1434
1435                 /*
1436                  * Only free SCBs for the commands coming down from the
1437                  * mid-layer, not for which were issued internally
1438                  *
1439                  * For internal command, restore the status returned by the
1440                  * firmware so that user can interpret it.
1441                  */
1442                 if (cmdid == CMDID_INT_CMDS) {
1443                         scb = &adapter->int_scb;
1444                         cmd = scb->cmd;
1445
1446                         list_del_init(&scb->list);
1447                         scb->state = SCB_FREE;
1448
1449                         adapter->int_status = status;
1450                         complete(&adapter->int_waitq);
1451                 } else {
1452                         scb = &adapter->scb_list[cmdid];
1453
1454                         /*
1455                          * Make sure f/w has completed a valid command
1456                          */
1457                         if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
1458                                 dev_crit(&adapter->dev->dev, "invalid command "
1459                                         "Id %d, scb->state:%x, scsi cmd:%p\n",
1460                                         cmdid, scb->state, scb->cmd);
1461
1462                                 continue;
1463                         }
1464
1465                         /*
1466                          * Was a abort issued for this command
1467                          */
1468                         if( scb->state & SCB_ABORT ) {
1469
1470                                 dev_warn(&adapter->dev->dev,
1471                                         "aborted cmd [%x] complete\n",
1472                                         scb->idx);
1473
1474                                 scb->cmd->result = (DID_ABORT << 16);
1475
1476                                 list_add_tail(SCSI_LIST(scb->cmd),
1477                                                 &adapter->completed_list);
1478
1479                                 mega_free_scb(adapter, scb);
1480
1481                                 continue;
1482                         }
1483
1484                         /*
1485                          * Was a reset issued for this command
1486                          */
1487                         if( scb->state & SCB_RESET ) {
1488
1489                                 dev_warn(&adapter->dev->dev,
1490                                         "reset cmd [%x] complete\n",
1491                                         scb->idx);
1492
1493                                 scb->cmd->result = (DID_RESET << 16);
1494
1495                                 list_add_tail(SCSI_LIST(scb->cmd),
1496                                                 &adapter->completed_list);
1497
1498                                 mega_free_scb (adapter, scb);
1499
1500                                 continue;
1501                         }
1502
1503                         cmd = scb->cmd;
1504                         pthru = scb->pthru;
1505                         epthru = scb->epthru;
1506                         mbox = (mbox_t *)scb->raw_mbox;
1507
1508 #if MEGA_HAVE_STATS
1509                         {
1510
1511                         int     logdrv = mbox->m_out.logdrv;
1512
1513                         islogical = adapter->logdrv_chan[cmd->channel];
1514                         /*
1515                          * Maintain an error counter for the logical drive.
1516                          * Some application like SNMP agent need such
1517                          * statistics
1518                          */
1519                         if( status && islogical && (cmd->cmnd[0] == READ_6 ||
1520                                                 cmd->cmnd[0] == READ_10 ||
1521                                                 cmd->cmnd[0] == READ_12)) {
1522                                 /*
1523                                  * Logical drive number increases by 0x80 when
1524                                  * a logical drive is deleted
1525                                  */
1526                                 adapter->rd_errors[logdrv%0x80]++;
1527                         }
1528
1529                         if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
1530                                                 cmd->cmnd[0] == WRITE_10 ||
1531                                                 cmd->cmnd[0] == WRITE_12)) {
1532                                 /*
1533                                  * Logical drive number increases by 0x80 when
1534                                  * a logical drive is deleted
1535                                  */
1536                                 adapter->wr_errors[logdrv%0x80]++;
1537                         }
1538
1539                         }
1540 #endif
1541                 }
1542
1543                 /*
1544                  * Do not return the presence of hard disk on the channel so,
1545                  * inquiry sent, and returned data==hard disk or removable
1546                  * hard disk and not logical, request should return failure! -
1547                  * PJ
1548                  */
1549                 islogical = adapter->logdrv_chan[cmd->device->channel];
1550                 if( cmd->cmnd[0] == INQUIRY && !islogical ) {
1551
1552                         sgl = scsi_sglist(cmd);
1553                         if( sg_page(sgl) ) {
1554                                 c = *(unsigned char *) sg_virt(&sgl[0]);
1555                         } else {
1556                                 dev_warn(&adapter->dev->dev, "invalid sg\n");
1557                                 c = 0;
1558                         }
1559
1560                         if(IS_RAID_CH(adapter, cmd->device->channel) &&
1561                                         ((c & 0x1F ) == TYPE_DISK)) {
1562                                 status = 0xF0;
1563                         }
1564                 }
1565
1566                 /* clear result; otherwise, success returns corrupt value */
1567                 cmd->result = 0;
1568
1569                 /* Convert MegaRAID status to Linux error code */
1570                 switch (status) {
1571                 case 0x00:      /* SUCCESS , i.e. SCSI_STATUS_GOOD */
1572                         cmd->result |= (DID_OK << 16);
1573                         break;
1574
1575                 case 0x02:      /* ERROR_ABORTED, i.e.
1576                                    SCSI_STATUS_CHECK_CONDITION */
1577
1578                         /* set sense_buffer and result fields */
1579                         if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
1580                                 mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
1581
1582                                 memcpy(cmd->sense_buffer, pthru->reqsensearea,
1583                                                 14);
1584
1585                                 cmd->result = SAM_STAT_CHECK_CONDITION;
1586                         }
1587                         else {
1588                                 if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
1589
1590                                         memcpy(cmd->sense_buffer,
1591                                                 epthru->reqsensearea, 14);
1592
1593                                         cmd->result = SAM_STAT_CHECK_CONDITION;
1594                                 } else
1595                                         scsi_build_sense(cmd, 0,
1596                                                          ABORTED_COMMAND, 0, 0);
1597                         }
1598                         break;
1599
1600                 case 0x08:      /* ERR_DEST_DRIVE_FAILED, i.e.
1601                                    SCSI_STATUS_BUSY */
1602                         cmd->result |= (DID_BUS_BUSY << 16) | status;
1603                         break;
1604
1605                 default:
1606 #if MEGA_HAVE_CLUSTERING
1607                         /*
1608                          * If TEST_UNIT_READY fails, we know
1609                          * MEGA_RESERVATION_STATUS failed
1610                          */
1611                         if( cmd->cmnd[0] == TEST_UNIT_READY ) {
1612                                 cmd->result |= (DID_ERROR << 16) |
1613                                         SAM_STAT_RESERVATION_CONFLICT;
1614                         }
1615                         else
1616                         /*
1617                          * Error code returned is 1 if Reserve or Release
1618                          * failed or the input parameter is invalid
1619                          */
1620                         if( status == 1 &&
1621                                 (cmd->cmnd[0] == RESERVE ||
1622                                          cmd->cmnd[0] == RELEASE) ) {
1623
1624                                 cmd->result |= (DID_ERROR << 16) |
1625                                         SAM_STAT_RESERVATION_CONFLICT;
1626                         }
1627                         else
1628 #endif
1629                                 cmd->result |= (DID_BAD_TARGET << 16)|status;
1630                 }
1631
1632                 mega_free_scb(adapter, scb);
1633
1634                 /* Add Scsi_Command to end of completed queue */
1635                 list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
1636         }
1637 }
1638
1639
1640 /*
1641  * mega_runpendq()
1642  *
1643  * Run through the list of completed requests and finish it
1644  */
1645 static void
1646 mega_rundoneq (adapter_t *adapter)
1647 {
1648         struct megaraid_cmd_priv *cmd_priv;
1649
1650         list_for_each_entry(cmd_priv, &adapter->completed_list, entry)
1651                 scsi_done(megaraid_to_scsi_cmd(cmd_priv));
1652
1653         INIT_LIST_HEAD(&adapter->completed_list);
1654 }
1655
1656
1657 /*
1658  * Free a SCB structure
1659  * Note: We assume the scsi commands associated with this scb is not free yet.
1660  */
1661 static void
1662 mega_free_scb(adapter_t *adapter, scb_t *scb)
1663 {
1664         switch( scb->dma_type ) {
1665
1666         case MEGA_DMA_TYPE_NONE:
1667                 break;
1668
1669         case MEGA_SGLIST:
1670                 scsi_dma_unmap(scb->cmd);
1671                 break;
1672         default:
1673                 break;
1674         }
1675
1676         /*
1677          * Remove from the pending list
1678          */
1679         list_del_init(&scb->list);
1680
1681         /* Link the scb back into free list */
1682         scb->state = SCB_FREE;
1683         scb->cmd = NULL;
1684
1685         list_add(&scb->list, &adapter->free_list);
1686 }
1687
1688
1689 static int
1690 __mega_busywait_mbox (adapter_t *adapter)
1691 {
1692         volatile mbox_t *mbox = adapter->mbox;
1693         long counter;
1694
1695         for (counter = 0; counter < 10000; counter++) {
1696                 if (!mbox->m_in.busy)
1697                         return 0;
1698                 udelay(100);
1699                 cond_resched();
1700         }
1701         return -1;              /* give up after 1 second */
1702 }
1703
1704 /*
1705  * Copies data to SGLIST
1706  * Note: For 64 bit cards, we need a minimum of one SG element for read/write
1707  */
1708 static int
1709 mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
1710 {
1711         struct scatterlist *sg;
1712         struct scsi_cmnd        *cmd;
1713         int     sgcnt;
1714         int     idx;
1715
1716         cmd = scb->cmd;
1717
1718         /*
1719          * Copy Scatter-Gather list info into controller structure.
1720          *
1721          * The number of sg elements returned must not exceed our limit
1722          */
1723         sgcnt = scsi_dma_map(cmd);
1724
1725         scb->dma_type = MEGA_SGLIST;
1726
1727         BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);
1728
1729         *len = 0;
1730
1731         if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
1732                 sg = scsi_sglist(cmd);
1733                 scb->dma_h_bulkdata = sg_dma_address(sg);
1734                 *buf = (u32)scb->dma_h_bulkdata;
1735                 *len = sg_dma_len(sg);
1736                 return 0;
1737         }
1738
1739         scsi_for_each_sg(cmd, sg, sgcnt, idx) {
1740                 if (adapter->has_64bit_addr) {
1741                         scb->sgl64[idx].address = sg_dma_address(sg);
1742                         *len += scb->sgl64[idx].length = sg_dma_len(sg);
1743                 } else {
1744                         scb->sgl[idx].address = sg_dma_address(sg);
1745                         *len += scb->sgl[idx].length = sg_dma_len(sg);
1746                 }
1747         }
1748
1749         /* Reset pointer and length fields */
1750         *buf = scb->sgl_dma_addr;
1751
1752         /* Return count of SG requests */
1753         return sgcnt;
1754 }
1755
1756
1757 /*
1758  * mega_8_to_40ld()
1759  *
1760  * takes all info in AdapterInquiry structure and puts it into ProductInfo and
1761  * Enquiry3 structures for later use
1762  */
1763 static void
1764 mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
1765                 mega_product_info *product_info)
1766 {
1767         int i;
1768
1769         product_info->max_commands = inquiry->adapter_info.max_commands;
1770         enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
1771         product_info->nchannels = inquiry->adapter_info.nchannels;
1772
1773         for (i = 0; i < 4; i++) {
1774                 product_info->fw_version[i] =
1775                         inquiry->adapter_info.fw_version[i];
1776
1777                 product_info->bios_version[i] =
1778                         inquiry->adapter_info.bios_version[i];
1779         }
1780         enquiry3->cache_flush_interval =
1781                 inquiry->adapter_info.cache_flush_interval;
1782
1783         product_info->dram_size = inquiry->adapter_info.dram_size;
1784
1785         enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
1786
1787         for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
1788                 enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
1789                 enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
1790                 enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
1791         }
1792
1793         for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
1794                 enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
1795 }
1796
1797 static inline void
1798 mega_free_sgl(adapter_t *adapter)
1799 {
1800         scb_t   *scb;
1801         int     i;
1802
1803         for(i = 0; i < adapter->max_cmds; i++) {
1804
1805                 scb = &adapter->scb_list[i];
1806
1807                 if( scb->sgl64 ) {
1808                         dma_free_coherent(&adapter->dev->dev,
1809                                           sizeof(mega_sgl64) * adapter->sglen,
1810                                           scb->sgl64, scb->sgl_dma_addr);
1811
1812                         scb->sgl64 = NULL;
1813                 }
1814
1815                 if( scb->pthru ) {
1816                         dma_free_coherent(&adapter->dev->dev,
1817                                           sizeof(mega_passthru), scb->pthru,
1818                                           scb->pthru_dma_addr);
1819
1820                         scb->pthru = NULL;
1821                 }
1822
1823                 if( scb->epthru ) {
1824                         dma_free_coherent(&adapter->dev->dev,
1825                                           sizeof(mega_ext_passthru),
1826                                           scb->epthru, scb->epthru_dma_addr);
1827
1828                         scb->epthru = NULL;
1829                 }
1830
1831         }
1832 }
1833
1834
1835 /*
1836  * Get information about the card/driver
1837  */
1838 const char *
1839 megaraid_info(struct Scsi_Host *host)
1840 {
1841         static char buffer[512];
1842         adapter_t *adapter;
1843
1844         adapter = (adapter_t *)host->hostdata;
1845
1846         sprintf (buffer,
1847                  "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
1848                  adapter->fw_version, adapter->product_info.max_commands,
1849                  adapter->host->max_id, adapter->host->max_channel,
1850                  (u32)adapter->host->max_lun);
1851         return buffer;
1852 }
1853
1854 /*
1855  * Abort a previous SCSI request. Only commands on the pending list can be
1856  * aborted. All the commands issued to the F/W must complete.
1857  */
1858 static int
1859 megaraid_abort(struct scsi_cmnd *cmd)
1860 {
1861         adapter_t       *adapter;
1862         int             rval;
1863
1864         adapter = (adapter_t *)cmd->device->host->hostdata;
1865
1866         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
1867
1868         /*
1869          * This is required here to complete any completed requests
1870          * to be communicated over to the mid layer.
1871          */
1872         mega_rundoneq(adapter);
1873
1874         return rval;
1875 }
1876
1877
1878 static int
1879 megaraid_reset(struct scsi_cmnd *cmd)
1880 {
1881         adapter_t       *adapter;
1882         megacmd_t       mc;
1883         int             rval;
1884
1885         adapter = (adapter_t *)cmd->device->host->hostdata;
1886
1887 #if MEGA_HAVE_CLUSTERING
1888         mc.cmd = MEGA_CLUSTER_CMD;
1889         mc.opcode = MEGA_RESET_RESERVATIONS;
1890
1891         if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
1892                 dev_warn(&adapter->dev->dev, "reservation reset failed\n");
1893         }
1894         else {
1895                 dev_info(&adapter->dev->dev, "reservation reset\n");
1896         }
1897 #endif
1898
1899         spin_lock_irq(&adapter->lock);
1900
1901         rval =  megaraid_abort_and_reset(adapter, NULL, SCB_RESET);
1902
1903         /*
1904          * This is required here to complete any completed requests
1905          * to be communicated over to the mid layer.
1906          */
1907         mega_rundoneq(adapter);
1908         spin_unlock_irq(&adapter->lock);
1909
1910         return rval;
1911 }
1912
1913 /**
1914  * megaraid_abort_and_reset()
1915  * @adapter: megaraid soft state
1916  * @cmd: scsi command to be aborted or reset
1917  * @aor: abort or reset flag
1918  *
1919  * Try to locate the scsi command in the pending queue. If found and is not
1920  * issued to the controller, abort/reset it. Otherwise return failure
1921  */
1922 static int
1923 megaraid_abort_and_reset(adapter_t *adapter, struct scsi_cmnd *cmd, int aor)
1924 {
1925         struct list_head        *pos, *next;
1926         scb_t                   *scb;
1927
1928         if (aor == SCB_ABORT)
1929                 dev_warn(&adapter->dev->dev,
1930                          "ABORTING cmd=%x <c=%d t=%d l=%d>\n",
1931                          cmd->cmnd[0], cmd->device->channel,
1932                          cmd->device->id, (u32)cmd->device->lun);
1933         else
1934                 dev_warn(&adapter->dev->dev, "RESETTING\n");
1935
1936         if(list_empty(&adapter->pending_list))
1937                 return FAILED;
1938
1939         list_for_each_safe(pos, next, &adapter->pending_list) {
1940
1941                 scb = list_entry(pos, scb_t, list);
1942
1943                 if (!cmd || scb->cmd == cmd) { /* Found command */
1944
1945                         scb->state |= aor;
1946
1947                         /*
1948                          * Check if this command has firmware ownership. If
1949                          * yes, we cannot reset this command. Whenever f/w
1950                          * completes this command, we will return appropriate
1951                          * status from ISR.
1952                          */
1953                         if( scb->state & SCB_ISSUED ) {
1954
1955                                 dev_warn(&adapter->dev->dev,
1956                                         "%s[%x], fw owner\n",
1957                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1958                                         scb->idx);
1959
1960                                 return FAILED;
1961                         }
1962                         /*
1963                          * Not yet issued! Remove from the pending
1964                          * list
1965                          */
1966                         dev_warn(&adapter->dev->dev,
1967                                  "%s-[%x], driver owner\n",
1968                                  (cmd) ? "ABORTING":"RESET",
1969                                  scb->idx);
1970                         mega_free_scb(adapter, scb);
1971
1972                         if (cmd) {
1973                                 cmd->result = (DID_ABORT << 16);
1974                                 list_add_tail(SCSI_LIST(cmd),
1975                                               &adapter->completed_list);
1976                         }
1977
1978                         return SUCCESS;
1979                 }
1980         }
1981
1982         return FAILED;
1983 }
1984
1985 static inline int
1986 make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
1987 {
1988         *pdev = pci_alloc_dev(NULL);
1989
1990         if( *pdev == NULL ) return -1;
1991
1992         memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
1993
1994         if (dma_set_mask(&(*pdev)->dev, DMA_BIT_MASK(32)) != 0) {
1995                 kfree(*pdev);
1996                 return -1;
1997         }
1998
1999         return 0;
2000 }
2001
2002 static inline void
2003 free_local_pdev(struct pci_dev *pdev)
2004 {
2005         kfree(pdev);
2006 }
2007
2008 /**
2009  * mega_allocate_inquiry()
2010  * @dma_handle: handle returned for dma address
2011  * @pdev: handle to pci device
2012  *
2013  * allocates memory for inquiry structure
2014  */
2015 static inline void *
2016 mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
2017 {
2018         return dma_alloc_coherent(&pdev->dev, sizeof(mega_inquiry3),
2019                                   dma_handle, GFP_KERNEL);
2020 }
2021
2022
2023 static inline void
2024 mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
2025 {
2026         dma_free_coherent(&pdev->dev, sizeof(mega_inquiry3), inquiry,
2027                           dma_handle);
2028 }
2029
2030
2031 #ifdef CONFIG_PROC_FS
2032 /* Following code handles /proc fs  */
2033
2034 /**
2035  * proc_show_config()
2036  * @m: Synthetic file construction data
2037  * @v: File iterator
2038  *
2039  * Display configuration information about the controller.
2040  */
2041 static int
2042 proc_show_config(struct seq_file *m, void *v)
2043 {
2044
2045         adapter_t *adapter = m->private;
2046
2047         seq_puts(m, MEGARAID_VERSION);
2048         if(adapter->product_info.product_name[0])
2049                 seq_printf(m, "%s\n", adapter->product_info.product_name);
2050
2051         seq_puts(m, "Controller Type: ");
2052
2053         if( adapter->flag & BOARD_MEMMAP )
2054                 seq_puts(m, "438/466/467/471/493/518/520/531/532\n");
2055         else
2056                 seq_puts(m, "418/428/434\n");
2057
2058         if(adapter->flag & BOARD_40LD)
2059                 seq_puts(m, "Controller Supports 40 Logical Drives\n");
2060
2061         if(adapter->flag & BOARD_64BIT)
2062                 seq_puts(m, "Controller capable of 64-bit memory addressing\n");
2063         if( adapter->has_64bit_addr )
2064                 seq_puts(m, "Controller using 64-bit memory addressing\n");
2065         else
2066                 seq_puts(m, "Controller is not using 64-bit memory addressing\n");
2067
2068         seq_printf(m, "Base = %08lx, Irq = %d, ",
2069                    adapter->base, adapter->host->irq);
2070
2071         seq_printf(m, "Logical Drives = %d, Channels = %d\n",
2072                    adapter->numldrv, adapter->product_info.nchannels);
2073
2074         seq_printf(m, "Version =%s:%s, DRAM = %dMb\n",
2075                    adapter->fw_version, adapter->bios_version,
2076                    adapter->product_info.dram_size);
2077
2078         seq_printf(m, "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
2079                    adapter->product_info.max_commands, adapter->max_cmds);
2080
2081         seq_printf(m, "support_ext_cdb    = %d\n", adapter->support_ext_cdb);
2082         seq_printf(m, "support_random_del = %d\n", adapter->support_random_del);
2083         seq_printf(m, "boot_ldrv_enabled  = %d\n", adapter->boot_ldrv_enabled);
2084         seq_printf(m, "boot_ldrv          = %d\n", adapter->boot_ldrv);
2085         seq_printf(m, "boot_pdrv_enabled  = %d\n", adapter->boot_pdrv_enabled);
2086         seq_printf(m, "boot_pdrv_ch       = %d\n", adapter->boot_pdrv_ch);
2087         seq_printf(m, "boot_pdrv_tgt      = %d\n", adapter->boot_pdrv_tgt);
2088         seq_printf(m, "quiescent          = %d\n",
2089                    atomic_read(&adapter->quiescent));
2090         seq_printf(m, "has_cluster        = %d\n", adapter->has_cluster);
2091
2092         seq_puts(m, "\nModule Parameters:\n");
2093         seq_printf(m, "max_cmd_per_lun    = %d\n", max_cmd_per_lun);
2094         seq_printf(m, "max_sectors_per_io = %d\n", max_sectors_per_io);
2095         return 0;
2096 }
2097
2098 /**
2099  * proc_show_stat()
2100  * @m: Synthetic file construction data
2101  * @v: File iterator
2102  *
2103  * Display statistical information about the I/O activity.
2104  */
2105 static int
2106 proc_show_stat(struct seq_file *m, void *v)
2107 {
2108         adapter_t *adapter = m->private;
2109 #if MEGA_HAVE_STATS
2110         int     i;
2111 #endif
2112
2113         seq_puts(m, "Statistical Information for this controller\n");
2114         seq_printf(m, "pend_cmds = %d\n", atomic_read(&adapter->pend_cmds));
2115 #if MEGA_HAVE_STATS
2116         for(i = 0; i < adapter->numldrv; i++) {
2117                 seq_printf(m, "Logical Drive %d:\n", i);
2118                 seq_printf(m, "\tReads Issued = %lu, Writes Issued = %lu\n",
2119                            adapter->nreads[i], adapter->nwrites[i]);
2120                 seq_printf(m, "\tSectors Read = %lu, Sectors Written = %lu\n",
2121                            adapter->nreadblocks[i], adapter->nwriteblocks[i]);
2122                 seq_printf(m, "\tRead errors = %lu, Write errors = %lu\n\n",
2123                            adapter->rd_errors[i], adapter->wr_errors[i]);
2124         }
2125 #else
2126         seq_puts(m, "IO and error counters not compiled in driver.\n");
2127 #endif
2128         return 0;
2129 }
2130
2131
2132 /**
2133  * proc_show_mbox()
2134  * @m: Synthetic file construction data
2135  * @v: File iterator
2136  *
2137  * Display mailbox information for the last command issued. This information
2138  * is good for debugging.
2139  */
2140 static int
2141 proc_show_mbox(struct seq_file *m, void *v)
2142 {
2143         adapter_t       *adapter = m->private;
2144         volatile mbox_t *mbox = adapter->mbox;
2145
2146         seq_puts(m, "Contents of Mail Box Structure\n");
2147         seq_printf(m, "  Fw Command   = 0x%02x\n", mbox->m_out.cmd);
2148         seq_printf(m, "  Cmd Sequence = 0x%02x\n", mbox->m_out.cmdid);
2149         seq_printf(m, "  No of Sectors= %04d\n", mbox->m_out.numsectors);
2150         seq_printf(m, "  LBA          = 0x%02x\n", mbox->m_out.lba);
2151         seq_printf(m, "  DTA          = 0x%08x\n", mbox->m_out.xferaddr);
2152         seq_printf(m, "  Logical Drive= 0x%02x\n", mbox->m_out.logdrv);
2153         seq_printf(m, "  No of SG Elmt= 0x%02x\n", mbox->m_out.numsgelements);
2154         seq_printf(m, "  Busy         = %01x\n", mbox->m_in.busy);
2155         seq_printf(m, "  Status       = 0x%02x\n", mbox->m_in.status);
2156         return 0;
2157 }
2158
2159
2160 /**
2161  * proc_show_rebuild_rate()
2162  * @m: Synthetic file construction data
2163  * @v: File iterator
2164  *
2165  * Display current rebuild rate
2166  */
2167 static int
2168 proc_show_rebuild_rate(struct seq_file *m, void *v)
2169 {
2170         adapter_t       *adapter = m->private;
2171         dma_addr_t      dma_handle;
2172         caddr_t         inquiry;
2173         struct pci_dev  *pdev;
2174
2175         if( make_local_pdev(adapter, &pdev) != 0 )
2176                 return 0;
2177
2178         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2179                 goto free_pdev;
2180
2181         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2182                 seq_puts(m, "Adapter inquiry failed.\n");
2183                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2184                 goto free_inquiry;
2185         }
2186
2187         if( adapter->flag & BOARD_40LD )
2188                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2189                            ((mega_inquiry3 *)inquiry)->rebuild_rate);
2190         else
2191                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2192                         ((mraid_ext_inquiry *)
2193                          inquiry)->raid_inq.adapter_info.rebuild_rate);
2194
2195 free_inquiry:
2196         mega_free_inquiry(inquiry, dma_handle, pdev);
2197 free_pdev:
2198         free_local_pdev(pdev);
2199         return 0;
2200 }
2201
2202
2203 /**
2204  * proc_show_battery()
2205  * @m: Synthetic file construction data
2206  * @v: File iterator
2207  *
2208  * Display information about the battery module on the controller.
2209  */
2210 static int
2211 proc_show_battery(struct seq_file *m, void *v)
2212 {
2213         adapter_t       *adapter = m->private;
2214         dma_addr_t      dma_handle;
2215         caddr_t         inquiry;
2216         struct pci_dev  *pdev;
2217         u8      battery_status;
2218
2219         if( make_local_pdev(adapter, &pdev) != 0 )
2220                 return 0;
2221
2222         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2223                 goto free_pdev;
2224
2225         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2226                 seq_puts(m, "Adapter inquiry failed.\n");
2227                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2228                 goto free_inquiry;
2229         }
2230
2231         if( adapter->flag & BOARD_40LD ) {
2232                 battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
2233         }
2234         else {
2235                 battery_status = ((mraid_ext_inquiry *)inquiry)->
2236                         raid_inq.adapter_info.battery_status;
2237         }
2238
2239         /*
2240          * Decode the battery status
2241          */
2242         seq_printf(m, "Battery Status:[%d]", battery_status);
2243
2244         if(battery_status == MEGA_BATT_CHARGE_DONE)
2245                 seq_puts(m, " Charge Done");
2246
2247         if(battery_status & MEGA_BATT_MODULE_MISSING)
2248                 seq_puts(m, " Module Missing");
2249
2250         if(battery_status & MEGA_BATT_LOW_VOLTAGE)
2251                 seq_puts(m, " Low Voltage");
2252
2253         if(battery_status & MEGA_BATT_TEMP_HIGH)
2254                 seq_puts(m, " Temperature High");
2255
2256         if(battery_status & MEGA_BATT_PACK_MISSING)
2257                 seq_puts(m, " Pack Missing");
2258
2259         if(battery_status & MEGA_BATT_CHARGE_INPROG)
2260                 seq_puts(m, " Charge In-progress");
2261
2262         if(battery_status & MEGA_BATT_CHARGE_FAIL)
2263                 seq_puts(m, " Charge Fail");
2264
2265         if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
2266                 seq_puts(m, " Cycles Exceeded");
2267
2268         seq_putc(m, '\n');
2269
2270 free_inquiry:
2271         mega_free_inquiry(inquiry, dma_handle, pdev);
2272 free_pdev:
2273         free_local_pdev(pdev);
2274         return 0;
2275 }
2276
2277
2278 /*
2279  * Display scsi inquiry
2280  */
2281 static void
2282 mega_print_inquiry(struct seq_file *m, char *scsi_inq)
2283 {
2284         int     i;
2285
2286         seq_puts(m, "  Vendor: ");
2287         seq_write(m, scsi_inq + 8, 8);
2288         seq_puts(m, "  Model: ");
2289         seq_write(m, scsi_inq + 16, 16);
2290         seq_puts(m, "  Rev: ");
2291         seq_write(m, scsi_inq + 32, 4);
2292         seq_putc(m, '\n');
2293
2294         i = scsi_inq[0] & 0x1f;
2295         seq_printf(m, "  Type:   %s ", scsi_device_type(i));
2296
2297         seq_printf(m, "                 ANSI SCSI revision: %02x",
2298                    scsi_inq[2] & 0x07);
2299
2300         if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
2301                 seq_puts(m, " CCS\n");
2302         else
2303                 seq_putc(m, '\n');
2304 }
2305
2306 /**
2307  * proc_show_pdrv()
2308  * @m: Synthetic file construction data
2309  * @adapter: pointer to our soft state
2310  * @channel: channel
2311  *
2312  * Display information about the physical drives.
2313  */
2314 static int
2315 proc_show_pdrv(struct seq_file *m, adapter_t *adapter, int channel)
2316 {
2317         dma_addr_t      dma_handle;
2318         char            *scsi_inq;
2319         dma_addr_t      scsi_inq_dma_handle;
2320         caddr_t         inquiry;
2321         struct pci_dev  *pdev;
2322         u8      *pdrv_state;
2323         u8      state;
2324         int     tgt;
2325         int     max_channels;
2326         int     i;
2327
2328         if( make_local_pdev(adapter, &pdev) != 0 )
2329                 return 0;
2330
2331         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2332                 goto free_pdev;
2333
2334         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2335                 seq_puts(m, "Adapter inquiry failed.\n");
2336                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2337                 goto free_inquiry;
2338         }
2339
2340
2341         scsi_inq = dma_alloc_coherent(&pdev->dev, 256, &scsi_inq_dma_handle,
2342                                       GFP_KERNEL);
2343         if( scsi_inq == NULL ) {
2344                 seq_puts(m, "memory not available for scsi inq.\n");
2345                 goto free_inquiry;
2346         }
2347
2348         if( adapter->flag & BOARD_40LD ) {
2349                 pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
2350         }
2351         else {
2352                 pdrv_state = ((mraid_ext_inquiry *)inquiry)->
2353                         raid_inq.pdrv_info.pdrv_state;
2354         }
2355
2356         max_channels = adapter->product_info.nchannels;
2357
2358         if( channel >= max_channels ) {
2359                 goto free_pci;
2360         }
2361
2362         for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
2363
2364                 i = channel*16 + tgt;
2365
2366                 state = *(pdrv_state + i);
2367                 switch( state & 0x0F ) {
2368                 case PDRV_ONLINE:
2369                         seq_printf(m, "Channel:%2d Id:%2d State: Online",
2370                                    channel, tgt);
2371                         break;
2372
2373                 case PDRV_FAILED:
2374                         seq_printf(m, "Channel:%2d Id:%2d State: Failed",
2375                                    channel, tgt);
2376                         break;
2377
2378                 case PDRV_RBLD:
2379                         seq_printf(m, "Channel:%2d Id:%2d State: Rebuild",
2380                                    channel, tgt);
2381                         break;
2382
2383                 case PDRV_HOTSPARE:
2384                         seq_printf(m, "Channel:%2d Id:%2d State: Hot spare",
2385                                    channel, tgt);
2386                         break;
2387
2388                 default:
2389                         seq_printf(m, "Channel:%2d Id:%2d State: Un-configured",
2390                                    channel, tgt);
2391                         break;
2392                 }
2393
2394                 /*
2395                  * This interface displays inquiries for disk drives
2396                  * only. Inquries for logical drives and non-disk
2397                  * devices are available through /proc/scsi/scsi
2398                  */
2399                 memset(scsi_inq, 0, 256);
2400                 if( mega_internal_dev_inquiry(adapter, channel, tgt,
2401                                 scsi_inq_dma_handle) ||
2402                                 (scsi_inq[0] & 0x1F) != TYPE_DISK ) {
2403                         continue;
2404                 }
2405
2406                 /*
2407                  * Check for overflow. We print less than 240
2408                  * characters for inquiry
2409                  */
2410                 seq_puts(m, ".\n");
2411                 mega_print_inquiry(m, scsi_inq);
2412         }
2413
2414 free_pci:
2415         dma_free_coherent(&pdev->dev, 256, scsi_inq, scsi_inq_dma_handle);
2416 free_inquiry:
2417         mega_free_inquiry(inquiry, dma_handle, pdev);
2418 free_pdev:
2419         free_local_pdev(pdev);
2420         return 0;
2421 }
2422
2423 /**
2424  * proc_show_pdrv_ch0()
2425  * @m: Synthetic file construction data
2426  * @v: File iterator
2427  *
2428  * Display information about the physical drives on physical channel 0.
2429  */
2430 static int
2431 proc_show_pdrv_ch0(struct seq_file *m, void *v)
2432 {
2433         return proc_show_pdrv(m, m->private, 0);
2434 }
2435
2436
2437 /**
2438  * proc_show_pdrv_ch1()
2439  * @m: Synthetic file construction data
2440  * @v: File iterator
2441  *
2442  * Display information about the physical drives on physical channel 1.
2443  */
2444 static int
2445 proc_show_pdrv_ch1(struct seq_file *m, void *v)
2446 {
2447         return proc_show_pdrv(m, m->private, 1);
2448 }
2449
2450
2451 /**
2452  * proc_show_pdrv_ch2()
2453  * @m: Synthetic file construction data
2454  * @v: File iterator
2455  *
2456  * Display information about the physical drives on physical channel 2.
2457  */
2458 static int
2459 proc_show_pdrv_ch2(struct seq_file *m, void *v)
2460 {
2461         return proc_show_pdrv(m, m->private, 2);
2462 }
2463
2464
2465 /**
2466  * proc_show_pdrv_ch3()
2467  * @m: Synthetic file construction data
2468  * @v: File iterator
2469  *
2470  * Display information about the physical drives on physical channel 3.
2471  */
2472 static int
2473 proc_show_pdrv_ch3(struct seq_file *m, void *v)
2474 {
2475         return proc_show_pdrv(m, m->private, 3);
2476 }
2477
2478
2479 /**
2480  * proc_show_rdrv()
2481  * @m: Synthetic file construction data
2482  * @adapter: pointer to our soft state
2483  * @start: starting logical drive to display
2484  * @end: ending logical drive to display
2485  *
2486  * We do not print the inquiry information since its already available through
2487  * /proc/scsi/scsi interface
2488  */
2489 static int
2490 proc_show_rdrv(struct seq_file *m, adapter_t *adapter, int start, int end )
2491 {
2492         dma_addr_t      dma_handle;
2493         logdrv_param    *lparam;
2494         megacmd_t       mc;
2495         char            *disk_array;
2496         dma_addr_t      disk_array_dma_handle;
2497         caddr_t         inquiry;
2498         struct pci_dev  *pdev;
2499         u8      *rdrv_state;
2500         int     num_ldrv;
2501         u32     array_sz;
2502         int     i;
2503
2504         if( make_local_pdev(adapter, &pdev) != 0 )
2505                 return 0;
2506
2507         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2508                 goto free_pdev;
2509
2510         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2511                 seq_puts(m, "Adapter inquiry failed.\n");
2512                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2513                 goto free_inquiry;
2514         }
2515
2516         memset(&mc, 0, sizeof(megacmd_t));
2517
2518         if( adapter->flag & BOARD_40LD ) {
2519                 array_sz = sizeof(disk_array_40ld);
2520
2521                 rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
2522
2523                 num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
2524         }
2525         else {
2526                 array_sz = sizeof(disk_array_8ld);
2527
2528                 rdrv_state = ((mraid_ext_inquiry *)inquiry)->
2529                         raid_inq.logdrv_info.ldrv_state;
2530
2531                 num_ldrv = ((mraid_ext_inquiry *)inquiry)->
2532                         raid_inq.logdrv_info.num_ldrv;
2533         }
2534
2535         disk_array = dma_alloc_coherent(&pdev->dev, array_sz,
2536                                         &disk_array_dma_handle, GFP_KERNEL);
2537
2538         if( disk_array == NULL ) {
2539                 seq_puts(m, "memory not available.\n");
2540                 goto free_inquiry;
2541         }
2542
2543         mc.xferaddr = (u32)disk_array_dma_handle;
2544
2545         if( adapter->flag & BOARD_40LD ) {
2546                 mc.cmd = FC_NEW_CONFIG;
2547                 mc.opcode = OP_DCMD_READ_CONFIG;
2548
2549                 if( mega_internal_command(adapter, &mc, NULL) ) {
2550                         seq_puts(m, "40LD read config failed.\n");
2551                         goto free_pci;
2552                 }
2553
2554         }
2555         else {
2556                 mc.cmd = NEW_READ_CONFIG_8LD;
2557
2558                 if( mega_internal_command(adapter, &mc, NULL) ) {
2559                         mc.cmd = READ_CONFIG_8LD;
2560                         if( mega_internal_command(adapter, &mc, NULL) ) {
2561                                 seq_puts(m, "8LD read config failed.\n");
2562                                 goto free_pci;
2563                         }
2564                 }
2565         }
2566
2567         for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
2568
2569                 if( adapter->flag & BOARD_40LD ) {
2570                         lparam =
2571                         &((disk_array_40ld *)disk_array)->ldrv[i].lparam;
2572                 }
2573                 else {
2574                         lparam =
2575                         &((disk_array_8ld *)disk_array)->ldrv[i].lparam;
2576                 }
2577
2578                 /*
2579                  * Check for overflow. We print less than 240 characters for
2580                  * information about each logical drive.
2581                  */
2582                 seq_printf(m, "Logical drive:%2d:, ", i);
2583
2584                 switch( rdrv_state[i] & 0x0F ) {
2585                 case RDRV_OFFLINE:
2586                         seq_puts(m, "state: offline");
2587                         break;
2588                 case RDRV_DEGRADED:
2589                         seq_puts(m, "state: degraded");
2590                         break;
2591                 case RDRV_OPTIMAL:
2592                         seq_puts(m, "state: optimal");
2593                         break;
2594                 case RDRV_DELETED:
2595                         seq_puts(m, "state: deleted");
2596                         break;
2597                 default:
2598                         seq_puts(m, "state: unknown");
2599                         break;
2600                 }
2601
2602                 /*
2603                  * Check if check consistency or initialization is going on
2604                  * for this logical drive.
2605                  */
2606                 if( (rdrv_state[i] & 0xF0) == 0x20 )
2607                         seq_puts(m, ", check-consistency in progress");
2608                 else if( (rdrv_state[i] & 0xF0) == 0x10 )
2609                         seq_puts(m, ", initialization in progress");
2610
2611                 seq_putc(m, '\n');
2612
2613                 seq_printf(m, "Span depth:%3d, ", lparam->span_depth);
2614                 seq_printf(m, "RAID level:%3d, ", lparam->level);
2615                 seq_printf(m, "Stripe size:%3d, ",
2616                            lparam->stripe_sz ? lparam->stripe_sz/2: 128);
2617                 seq_printf(m, "Row size:%3d\n", lparam->row_size);
2618
2619                 seq_puts(m, "Read Policy: ");
2620                 switch(lparam->read_ahead) {
2621                 case NO_READ_AHEAD:
2622                         seq_puts(m, "No read ahead, ");
2623                         break;
2624                 case READ_AHEAD:
2625                         seq_puts(m, "Read ahead, ");
2626                         break;
2627                 case ADAP_READ_AHEAD:
2628                         seq_puts(m, "Adaptive, ");
2629                         break;
2630
2631                 }
2632
2633                 seq_puts(m, "Write Policy: ");
2634                 switch(lparam->write_mode) {
2635                 case WRMODE_WRITE_THRU:
2636                         seq_puts(m, "Write thru, ");
2637                         break;
2638                 case WRMODE_WRITE_BACK:
2639                         seq_puts(m, "Write back, ");
2640                         break;
2641                 }
2642
2643                 seq_puts(m, "Cache Policy: ");
2644                 switch(lparam->direct_io) {
2645                 case CACHED_IO:
2646                         seq_puts(m, "Cached IO\n\n");
2647                         break;
2648                 case DIRECT_IO:
2649                         seq_puts(m, "Direct IO\n\n");
2650                         break;
2651                 }
2652         }
2653
2654 free_pci:
2655         dma_free_coherent(&pdev->dev, array_sz, disk_array,
2656                           disk_array_dma_handle);
2657 free_inquiry:
2658         mega_free_inquiry(inquiry, dma_handle, pdev);
2659 free_pdev:
2660         free_local_pdev(pdev);
2661         return 0;
2662 }
2663
2664 /**
2665  * proc_show_rdrv_10()
2666  * @m: Synthetic file construction data
2667  * @v: File iterator
2668  *
2669  * Display real time information about the logical drives 0 through 9.
2670  */
2671 static int
2672 proc_show_rdrv_10(struct seq_file *m, void *v)
2673 {
2674         return proc_show_rdrv(m, m->private, 0, 9);
2675 }
2676
2677
2678 /**
2679  * proc_show_rdrv_20()
2680  * @m: Synthetic file construction data
2681  * @v: File iterator
2682  *
2683  * Display real time information about the logical drives 0 through 9.
2684  */
2685 static int
2686 proc_show_rdrv_20(struct seq_file *m, void *v)
2687 {
2688         return proc_show_rdrv(m, m->private, 10, 19);
2689 }
2690
2691
2692 /**
2693  * proc_show_rdrv_30()
2694  * @m: Synthetic file construction data
2695  * @v: File iterator
2696  *
2697  * Display real time information about the logical drives 0 through 9.
2698  */
2699 static int
2700 proc_show_rdrv_30(struct seq_file *m, void *v)
2701 {
2702         return proc_show_rdrv(m, m->private, 20, 29);
2703 }
2704
2705
2706 /**
2707  * proc_show_rdrv_40()
2708  * @m: Synthetic file construction data
2709  * @v: File iterator
2710  *
2711  * Display real time information about the logical drives 0 through 9.
2712  */
2713 static int
2714 proc_show_rdrv_40(struct seq_file *m, void *v)
2715 {
2716         return proc_show_rdrv(m, m->private, 30, 39);
2717 }
2718
2719 /**
2720  * mega_create_proc_entry()
2721  * @index: index in soft state array
2722  * @parent: parent node for this /proc entry
2723  *
2724  * Creates /proc entries for our controllers.
2725  */
2726 static void
2727 mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2728 {
2729         adapter_t *adapter = hba_soft_state[index];
2730         struct proc_dir_entry *dir;
2731         u8 string[16];
2732
2733         sprintf(string, "hba%d", adapter->host->host_no);
2734         dir = proc_mkdir_data(string, 0, parent, adapter);
2735         if (!dir) {
2736                 dev_warn(&adapter->dev->dev, "proc_mkdir failed\n");
2737                 return;
2738         }
2739
2740         proc_create_single_data("config", S_IRUSR, dir,
2741                         proc_show_config, adapter);
2742         proc_create_single_data("stat", S_IRUSR, dir,
2743                         proc_show_stat, adapter);
2744         proc_create_single_data("mailbox", S_IRUSR, dir,
2745                         proc_show_mbox, adapter);
2746 #if MEGA_HAVE_ENH_PROC
2747         proc_create_single_data("rebuild-rate", S_IRUSR, dir,
2748                         proc_show_rebuild_rate, adapter);
2749         proc_create_single_data("battery-status", S_IRUSR, dir,
2750                         proc_show_battery, adapter);
2751         proc_create_single_data("diskdrives-ch0", S_IRUSR, dir,
2752                         proc_show_pdrv_ch0, adapter);
2753         proc_create_single_data("diskdrives-ch1", S_IRUSR, dir,
2754                         proc_show_pdrv_ch1, adapter);
2755         proc_create_single_data("diskdrives-ch2", S_IRUSR, dir,
2756                         proc_show_pdrv_ch2, adapter);
2757         proc_create_single_data("diskdrives-ch3", S_IRUSR, dir,
2758                         proc_show_pdrv_ch3, adapter);
2759         proc_create_single_data("raiddrives-0-9", S_IRUSR, dir,
2760                         proc_show_rdrv_10, adapter);
2761         proc_create_single_data("raiddrives-10-19", S_IRUSR, dir,
2762                         proc_show_rdrv_20, adapter);
2763         proc_create_single_data("raiddrives-20-29", S_IRUSR, dir,
2764                         proc_show_rdrv_30, adapter);
2765         proc_create_single_data("raiddrives-30-39", S_IRUSR, dir,
2766                         proc_show_rdrv_40, adapter);
2767 #endif
2768 }
2769
2770 #else
2771 static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2772 {
2773 }
2774 #endif
2775
2776
2777 /*
2778  * megaraid_biosparam()
2779  *
2780  * Return the disk geometry for a particular disk
2781  */
2782 static int
2783 megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
2784                     sector_t capacity, int geom[])
2785 {
2786         adapter_t       *adapter;
2787         int     heads;
2788         int     sectors;
2789         int     cylinders;
2790
2791         /* Get pointer to host config structure */
2792         adapter = (adapter_t *)sdev->host->hostdata;
2793
2794         if (IS_RAID_CH(adapter, sdev->channel)) {
2795                         /* Default heads (64) & sectors (32) */
2796                         heads = 64;
2797                         sectors = 32;
2798                         cylinders = (ulong)capacity / (heads * sectors);
2799
2800                         /*
2801                          * Handle extended translation size for logical drives
2802                          * > 1Gb
2803                          */
2804                         if ((ulong)capacity >= 0x200000) {
2805                                 heads = 255;
2806                                 sectors = 63;
2807                                 cylinders = (ulong)capacity / (heads * sectors);
2808                         }
2809
2810                         /* return result */
2811                         geom[0] = heads;
2812                         geom[1] = sectors;
2813                         geom[2] = cylinders;
2814         }
2815         else {
2816                 if (scsi_partsize(bdev, capacity, geom))
2817                         return 0;
2818
2819                 dev_info(&adapter->dev->dev,
2820                          "invalid partition on this disk on channel %d\n",
2821                          sdev->channel);
2822
2823                 /* Default heads (64) & sectors (32) */
2824                 heads = 64;
2825                 sectors = 32;
2826                 cylinders = (ulong)capacity / (heads * sectors);
2827
2828                 /* Handle extended translation size for logical drives > 1Gb */
2829                 if ((ulong)capacity >= 0x200000) {
2830                         heads = 255;
2831                         sectors = 63;
2832                         cylinders = (ulong)capacity / (heads * sectors);
2833                 }
2834
2835                 /* return result */
2836                 geom[0] = heads;
2837                 geom[1] = sectors;
2838                 geom[2] = cylinders;
2839         }
2840
2841         return 0;
2842 }
2843
2844 /**
2845  * mega_init_scb()
2846  * @adapter: pointer to our soft state
2847  *
2848  * Allocate memory for the various pointers in the scb structures:
2849  * scatter-gather list pointer, passthru and extended passthru structure
2850  * pointers.
2851  */
2852 static int
2853 mega_init_scb(adapter_t *adapter)
2854 {
2855         scb_t   *scb;
2856         int     i;
2857
2858         for( i = 0; i < adapter->max_cmds; i++ ) {
2859
2860                 scb = &adapter->scb_list[i];
2861
2862                 scb->sgl64 = NULL;
2863                 scb->sgl = NULL;
2864                 scb->pthru = NULL;
2865                 scb->epthru = NULL;
2866         }
2867
2868         for( i = 0; i < adapter->max_cmds; i++ ) {
2869
2870                 scb = &adapter->scb_list[i];
2871
2872                 scb->idx = i;
2873
2874                 scb->sgl64 = dma_alloc_coherent(&adapter->dev->dev,
2875                                                 sizeof(mega_sgl64) * adapter->sglen,
2876                                                 &scb->sgl_dma_addr, GFP_KERNEL);
2877
2878                 scb->sgl = (mega_sglist *)scb->sgl64;
2879
2880                 if( !scb->sgl ) {
2881                         dev_warn(&adapter->dev->dev, "RAID: Can't allocate sglist\n");
2882                         mega_free_sgl(adapter);
2883                         return -1;
2884                 }
2885
2886                 scb->pthru = dma_alloc_coherent(&adapter->dev->dev,
2887                                                 sizeof(mega_passthru),
2888                                                 &scb->pthru_dma_addr, GFP_KERNEL);
2889
2890                 if( !scb->pthru ) {
2891                         dev_warn(&adapter->dev->dev, "RAID: Can't allocate passthru\n");
2892                         mega_free_sgl(adapter);
2893                         return -1;
2894                 }
2895
2896                 scb->epthru = dma_alloc_coherent(&adapter->dev->dev,
2897                                                  sizeof(mega_ext_passthru),
2898                                                  &scb->epthru_dma_addr, GFP_KERNEL);
2899
2900                 if( !scb->epthru ) {
2901                         dev_warn(&adapter->dev->dev,
2902                                 "Can't allocate extended passthru\n");
2903                         mega_free_sgl(adapter);
2904                         return -1;
2905                 }
2906
2907
2908                 scb->dma_type = MEGA_DMA_TYPE_NONE;
2909
2910                 /*
2911                  * Link to free list
2912                  * lock not required since we are loading the driver, so no
2913                  * commands possible right now.
2914                  */
2915                 scb->state = SCB_FREE;
2916                 scb->cmd = NULL;
2917                 list_add(&scb->list, &adapter->free_list);
2918         }
2919
2920         return 0;
2921 }
2922
2923
2924 /**
2925  * megadev_open()
2926  * @inode: unused
2927  * @filep: unused
2928  *
2929  * Routines for the character/ioctl interface to the driver. Find out if this
2930  * is a valid open.
2931  */
2932 static int
2933 megadev_open (struct inode *inode, struct file *filep)
2934 {
2935         /*
2936          * Only allow superuser to access private ioctl interface
2937          */
2938         if( !capable(CAP_SYS_ADMIN) ) return -EACCES;
2939
2940         return 0;
2941 }
2942
2943
2944 /**
2945  * megadev_ioctl()
2946  * @filep: Our device file
2947  * @cmd: ioctl command
2948  * @arg: user buffer
2949  *
2950  * ioctl entry point for our private ioctl interface. We move the data in from
2951  * the user space, prepare the command (if necessary, convert the old MIMD
2952  * ioctl to new ioctl command), and issue a synchronous command to the
2953  * controller.
2954  */
2955 static int
2956 megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
2957 {
2958         adapter_t       *adapter;
2959         nitioctl_t      uioc;
2960         int             adapno;
2961         int             rval;
2962         mega_passthru   __user *upthru; /* user address for passthru */
2963         mega_passthru   *pthru;         /* copy user passthru here */
2964         dma_addr_t      pthru_dma_hndl;
2965         void            *data = NULL;   /* data to be transferred */
2966         dma_addr_t      data_dma_hndl;  /* dma handle for data xfer area */
2967         megacmd_t       mc;
2968 #if MEGA_HAVE_STATS
2969         megastat_t      __user *ustats = NULL;
2970         int             num_ldrv = 0;
2971 #endif
2972         u32             uxferaddr = 0;
2973         struct pci_dev  *pdev;
2974
2975         /*
2976          * Make sure only USCSICMD are issued through this interface.
2977          * MIMD application would still fire different command.
2978          */
2979         if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
2980                 return -EINVAL;
2981         }
2982
2983         /*
2984          * Check and convert a possible MIMD command to NIT command.
2985          * mega_m_to_n() copies the data from the user space, so we do not
2986          * have to do it here.
2987          * NOTE: We will need some user address to copyout the data, therefore
2988          * the inteface layer will also provide us with the required user
2989          * addresses.
2990          */
2991         memset(&uioc, 0, sizeof(nitioctl_t));
2992         if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
2993                 return rval;
2994
2995
2996         switch( uioc.opcode ) {
2997
2998         case GET_DRIVER_VER:
2999                 if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
3000                         return (-EFAULT);
3001
3002                 break;
3003
3004         case GET_N_ADAP:
3005                 if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
3006                         return (-EFAULT);
3007
3008                 /*
3009                  * Shucks. MIMD interface returns a positive value for number
3010                  * of adapters. TODO: Change it to return 0 when there is no
3011                  * applicatio using mimd interface.
3012                  */
3013                 return hba_count;
3014
3015         case GET_ADAP_INFO:
3016
3017                 /*
3018                  * Which adapter
3019                  */
3020                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3021                         return (-ENODEV);
3022
3023                 if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
3024                                 sizeof(struct mcontroller)) )
3025                         return (-EFAULT);
3026                 break;
3027
3028 #if MEGA_HAVE_STATS
3029
3030         case GET_STATS:
3031                 /*
3032                  * Which adapter
3033                  */
3034                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3035                         return (-ENODEV);
3036
3037                 adapter = hba_soft_state[adapno];
3038
3039                 ustats = uioc.uioc_uaddr;
3040
3041                 if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
3042                         return (-EFAULT);
3043
3044                 /*
3045                  * Check for the validity of the logical drive number
3046                  */
3047                 if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
3048
3049                 if( copy_to_user(ustats->nreads, adapter->nreads,
3050                                         num_ldrv*sizeof(u32)) )
3051                         return -EFAULT;
3052
3053                 if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
3054                                         num_ldrv*sizeof(u32)) )
3055                         return -EFAULT;
3056
3057                 if( copy_to_user(ustats->nwrites, adapter->nwrites,
3058                                         num_ldrv*sizeof(u32)) )
3059                         return -EFAULT;
3060
3061                 if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
3062                                         num_ldrv*sizeof(u32)) )
3063                         return -EFAULT;
3064
3065                 if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
3066                                         num_ldrv*sizeof(u32)) )
3067                         return -EFAULT;
3068
3069                 if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
3070                                         num_ldrv*sizeof(u32)) )
3071                         return -EFAULT;
3072
3073                 return 0;
3074
3075 #endif
3076         case MBOX_CMD:
3077
3078                 /*
3079                  * Which adapter
3080                  */
3081                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3082                         return (-ENODEV);
3083
3084                 adapter = hba_soft_state[adapno];
3085
3086                 /*
3087                  * Deletion of logical drive is a special case. The adapter
3088                  * should be quiescent before this command is issued.
3089                  */
3090                 if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
3091                                 uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
3092
3093                         /*
3094                          * Do we support this feature
3095                          */
3096                         if( !adapter->support_random_del ) {
3097                                 dev_warn(&adapter->dev->dev, "logdrv "
3098                                         "delete on non-supporting F/W\n");
3099
3100                                 return (-EINVAL);
3101                         }
3102
3103                         rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
3104
3105                         if( rval == 0 ) {
3106                                 memset(&mc, 0, sizeof(megacmd_t));
3107
3108                                 mc.status = rval;
3109
3110                                 rval = mega_n_to_m((void __user *)arg, &mc);
3111                         }
3112
3113                         return rval;
3114                 }
3115                 /*
3116                  * This interface only support the regular passthru commands.
3117                  * Reject extended passthru and 64-bit passthru
3118                  */
3119                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
3120                         uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
3121
3122                         dev_warn(&adapter->dev->dev, "rejected passthru\n");
3123
3124                         return (-EINVAL);
3125                 }
3126
3127                 /*
3128                  * For all internal commands, the buffer must be allocated in
3129                  * <4GB address range
3130                  */
3131                 if( make_local_pdev(adapter, &pdev) != 0 )
3132                         return -EIO;
3133
3134                 /* Is it a passthru command or a DCMD */
3135                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
3136                         /* Passthru commands */
3137
3138                         pthru = dma_alloc_coherent(&pdev->dev,
3139                                                    sizeof(mega_passthru),
3140                                                    &pthru_dma_hndl, GFP_KERNEL);
3141
3142                         if( pthru == NULL ) {
3143                                 free_local_pdev(pdev);
3144                                 return (-ENOMEM);
3145                         }
3146
3147                         /*
3148                          * The user passthru structure
3149                          */
3150                         upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr;
3151
3152                         /*
3153                          * Copy in the user passthru here.
3154                          */
3155                         if( copy_from_user(pthru, upthru,
3156                                                 sizeof(mega_passthru)) ) {
3157
3158                                 dma_free_coherent(&pdev->dev,
3159                                                   sizeof(mega_passthru),
3160                                                   pthru, pthru_dma_hndl);
3161
3162                                 free_local_pdev(pdev);
3163
3164                                 return (-EFAULT);
3165                         }
3166
3167                         /*
3168                          * Is there a data transfer
3169                          */
3170                         if( pthru->dataxferlen ) {
3171                                 data = dma_alloc_coherent(&pdev->dev,
3172                                                           pthru->dataxferlen,
3173                                                           &data_dma_hndl,
3174                                                           GFP_KERNEL);
3175
3176                                 if( data == NULL ) {
3177                                         dma_free_coherent(&pdev->dev,
3178                                                           sizeof(mega_passthru),
3179                                                           pthru,
3180                                                           pthru_dma_hndl);
3181
3182                                         free_local_pdev(pdev);
3183
3184                                         return (-ENOMEM);
3185                                 }
3186
3187                                 /*
3188                                  * Save the user address and point the kernel
3189                                  * address at just allocated memory
3190                                  */
3191                                 uxferaddr = pthru->dataxferaddr;
3192                                 pthru->dataxferaddr = data_dma_hndl;
3193                         }
3194
3195
3196                         /*
3197                          * Is data coming down-stream
3198                          */
3199                         if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) {
3200                                 /*
3201                                  * Get the user data
3202                                  */
3203                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3204                                                         pthru->dataxferlen) ) {
3205                                         rval = (-EFAULT);
3206                                         goto freemem_and_return;
3207                                 }
3208                         }
3209
3210                         memset(&mc, 0, sizeof(megacmd_t));
3211
3212                         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
3213                         mc.xferaddr = (u32)pthru_dma_hndl;
3214
3215                         /*
3216                          * Issue the command
3217                          */
3218                         mega_internal_command(adapter, &mc, pthru);
3219
3220                         rval = mega_n_to_m((void __user *)arg, &mc);
3221
3222                         if( rval ) goto freemem_and_return;
3223
3224
3225                         /*
3226                          * Is data going up-stream
3227                          */
3228                         if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
3229                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3230                                                         pthru->dataxferlen) ) {
3231                                         rval = (-EFAULT);
3232                                 }
3233                         }
3234
3235                         /*
3236                          * Send the request sense data also, irrespective of
3237                          * whether the user has asked for it or not.
3238                          */
3239                         if (copy_to_user(upthru->reqsensearea,
3240                                         pthru->reqsensearea, 14))
3241                                 rval = -EFAULT;
3242
3243 freemem_and_return:
3244                         if( pthru->dataxferlen ) {
3245                                 dma_free_coherent(&pdev->dev,
3246                                                   pthru->dataxferlen, data,
3247                                                   data_dma_hndl);
3248                         }
3249
3250                         dma_free_coherent(&pdev->dev, sizeof(mega_passthru),
3251                                           pthru, pthru_dma_hndl);
3252
3253                         free_local_pdev(pdev);
3254
3255                         return rval;
3256                 }
3257                 else {
3258                         /* DCMD commands */
3259
3260                         /*
3261                          * Is there a data transfer
3262                          */
3263                         if( uioc.xferlen ) {
3264                                 data = dma_alloc_coherent(&pdev->dev,
3265                                                           uioc.xferlen,
3266                                                           &data_dma_hndl,
3267                                                           GFP_KERNEL);
3268
3269                                 if( data == NULL ) {
3270                                         free_local_pdev(pdev);
3271                                         return (-ENOMEM);
3272                                 }
3273
3274                                 uxferaddr = MBOX(uioc)->xferaddr;
3275                         }
3276
3277                         /*
3278                          * Is data coming down-stream
3279                          */
3280                         if( uioc.xferlen && (uioc.flags & UIOC_WR) ) {
3281                                 /*
3282                                  * Get the user data
3283                                  */
3284                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3285                                                         uioc.xferlen) ) {
3286
3287                                         dma_free_coherent(&pdev->dev,
3288                                                           uioc.xferlen, data,
3289                                                           data_dma_hndl);
3290
3291                                         free_local_pdev(pdev);
3292
3293                                         return (-EFAULT);
3294                                 }
3295                         }
3296
3297                         memcpy(&mc, MBOX(uioc), sizeof(megacmd_t));
3298
3299                         mc.xferaddr = (u32)data_dma_hndl;
3300
3301                         /*
3302                          * Issue the command
3303                          */
3304                         mega_internal_command(adapter, &mc, NULL);
3305
3306                         rval = mega_n_to_m((void __user *)arg, &mc);
3307
3308                         if( rval ) {
3309                                 if( uioc.xferlen ) {
3310                                         dma_free_coherent(&pdev->dev,
3311                                                           uioc.xferlen, data,
3312                                                           data_dma_hndl);
3313                                 }
3314
3315                                 free_local_pdev(pdev);
3316
3317                                 return rval;
3318                         }
3319
3320                         /*
3321                          * Is data going up-stream
3322                          */
3323                         if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
3324                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3325                                                         uioc.xferlen) ) {
3326
3327                                         rval = (-EFAULT);
3328                                 }
3329                         }
3330
3331                         if( uioc.xferlen ) {
3332                                 dma_free_coherent(&pdev->dev, uioc.xferlen,
3333                                                   data, data_dma_hndl);
3334                         }
3335
3336                         free_local_pdev(pdev);
3337
3338                         return rval;
3339                 }
3340
3341         default:
3342                 return (-EINVAL);
3343         }
3344
3345         return 0;
3346 }
3347
3348 static long
3349 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3350 {
3351         int ret;
3352
3353         mutex_lock(&megadev_mutex);
3354         ret = megadev_ioctl(filep, cmd, arg);
3355         mutex_unlock(&megadev_mutex);
3356
3357         return ret;
3358 }
3359
3360 /**
3361  * mega_m_to_n()
3362  * @arg: user address
3363  * @uioc: new ioctl structure
3364  *
3365  * A thin layer to convert older mimd interface ioctl structure to NIT ioctl
3366  * structure
3367  *
3368  * Converts the older mimd ioctl structure to newer NIT structure
3369  */
3370 static int
3371 mega_m_to_n(void __user *arg, nitioctl_t *uioc)
3372 {
3373         struct uioctl_t uioc_mimd;
3374         char    signature[8] = {0};
3375         u8      opcode;
3376         u8      subopcode;
3377
3378
3379         /*
3380          * check is the application conforms to NIT. We do not have to do much
3381          * in that case.
3382          * We exploit the fact that the signature is stored in the very
3383          * beginning of the structure.
3384          */
3385
3386         if( copy_from_user(signature, arg, 7) )
3387                 return (-EFAULT);
3388
3389         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3390
3391                 /*
3392                  * NOTE NOTE: The nit ioctl is still under flux because of
3393                  * change of mailbox definition, in HPE. No applications yet
3394                  * use this interface and let's not have applications use this
3395                  * interface till the new specifitions are in place.
3396                  */
3397                 return -EINVAL;
3398 #if 0
3399                 if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
3400                         return (-EFAULT);
3401                 return 0;
3402 #endif
3403         }
3404
3405         /*
3406          * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
3407          *
3408          * Get the user ioctl structure
3409          */
3410         if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
3411                 return (-EFAULT);
3412
3413
3414         /*
3415          * Get the opcode and subopcode for the commands
3416          */
3417         opcode = uioc_mimd.ui.fcs.opcode;
3418         subopcode = uioc_mimd.ui.fcs.subopcode;
3419
3420         switch (opcode) {
3421         case 0x82:
3422
3423                 switch (subopcode) {
3424
3425                 case MEGAIOC_QDRVRVER:  /* Query driver version */
3426                         uioc->opcode = GET_DRIVER_VER;
3427                         uioc->uioc_uaddr = uioc_mimd.data;
3428                         break;
3429
3430                 case MEGAIOC_QNADAP:    /* Get # of adapters */
3431                         uioc->opcode = GET_N_ADAP;
3432                         uioc->uioc_uaddr = uioc_mimd.data;
3433                         break;
3434
3435                 case MEGAIOC_QADAPINFO: /* Get adapter information */
3436                         uioc->opcode = GET_ADAP_INFO;
3437                         uioc->adapno = uioc_mimd.ui.fcs.adapno;
3438                         uioc->uioc_uaddr = uioc_mimd.data;
3439                         break;
3440
3441                 default:
3442                         return(-EINVAL);
3443                 }
3444
3445                 break;
3446
3447
3448         case 0x81:
3449
3450                 uioc->opcode = MBOX_CMD;
3451                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3452
3453                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3454
3455                 uioc->xferlen = uioc_mimd.ui.fcs.length;
3456
3457                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3458                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3459
3460                 break;
3461
3462         case 0x80:
3463
3464                 uioc->opcode = MBOX_CMD;
3465                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3466
3467                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3468
3469                 /*
3470                  * Choose the xferlen bigger of input and output data
3471                  */
3472                 uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
3473                         uioc_mimd.outlen : uioc_mimd.inlen;
3474
3475                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3476                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3477
3478                 break;
3479
3480         default:
3481                 return (-EINVAL);
3482
3483         }
3484
3485         return 0;
3486 }
3487
3488 /*
3489  * mega_n_to_m()
3490  * @arg: user address
3491  * @mc: mailbox command
3492  *
3493  * Updates the status information to the application, depending on application
3494  * conforms to older mimd ioctl interface or newer NIT ioctl interface
3495  */
3496 static int
3497 mega_n_to_m(void __user *arg, megacmd_t *mc)
3498 {
3499         nitioctl_t      __user *uiocp;
3500         megacmd_t       __user *umc;
3501         mega_passthru   __user *upthru;
3502         struct uioctl_t __user *uioc_mimd;
3503         char    signature[8] = {0};
3504
3505         /*
3506          * check is the application conforms to NIT.
3507          */
3508         if( copy_from_user(signature, arg, 7) )
3509                 return -EFAULT;
3510
3511         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3512
3513                 uiocp = arg;
3514
3515                 if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
3516                         return (-EFAULT);
3517
3518                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3519
3520                         umc = MBOX_P(uiocp);
3521
3522                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3523                                 return -EFAULT;
3524
3525                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
3526                                 return (-EFAULT);
3527                 }
3528         }
3529         else {
3530                 uioc_mimd = arg;
3531
3532                 if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
3533                         return (-EFAULT);
3534
3535                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3536
3537                         umc = (megacmd_t __user *)uioc_mimd->mbox;
3538
3539                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3540                                 return (-EFAULT);
3541
3542                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
3543                                 return (-EFAULT);
3544                 }
3545         }
3546
3547         return 0;
3548 }
3549
3550
3551 /*
3552  * MEGARAID 'FW' commands.
3553  */
3554
3555 /**
3556  * mega_is_bios_enabled()
3557  * @adapter: pointer to our soft state
3558  *
3559  * issue command to find out if the BIOS is enabled for this controller
3560  */
3561 static int
3562 mega_is_bios_enabled(adapter_t *adapter)
3563 {
3564         struct mbox_out mbox;
3565         unsigned char   *raw_mbox = (u8 *)&mbox;
3566
3567         memset(&mbox, 0, sizeof(mbox));
3568
3569         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3570
3571         mbox.xferaddr = (u32)adapter->buf_dma_handle;
3572
3573         raw_mbox[0] = IS_BIOS_ENABLED;
3574         raw_mbox[2] = GET_BIOS;
3575
3576         issue_scb_block(adapter, raw_mbox);
3577
3578         return *(char *)adapter->mega_buffer;
3579 }
3580
3581
3582 /**
3583  * mega_enum_raid_scsi()
3584  * @adapter: pointer to our soft state
3585  *
3586  * Find out what channels are RAID/SCSI. This information is used to
3587  * differentiate the virtual channels and physical channels and to support
3588  * ROMB feature and non-disk devices.
3589  */
3590 static void
3591 mega_enum_raid_scsi(adapter_t *adapter)
3592 {
3593         struct mbox_out mbox;
3594         unsigned char   *raw_mbox = (u8 *)&mbox;
3595         int i;
3596
3597         memset(&mbox, 0, sizeof(mbox));
3598
3599         /*
3600          * issue command to find out what channels are raid/scsi
3601          */
3602         raw_mbox[0] = CHNL_CLASS;
3603         raw_mbox[2] = GET_CHNL_CLASS;
3604
3605         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3606
3607         mbox.xferaddr = (u32)adapter->buf_dma_handle;
3608
3609         /*
3610          * Non-ROMB firmware fail this command, so all channels
3611          * must be shown RAID
3612          */
3613         adapter->mega_ch_class = 0xFF;
3614
3615         if(!issue_scb_block(adapter, raw_mbox)) {
3616                 adapter->mega_ch_class = *((char *)adapter->mega_buffer);
3617
3618         }
3619
3620         for( i = 0; i < adapter->product_info.nchannels; i++ ) {
3621                 if( (adapter->mega_ch_class >> i) & 0x01 ) {
3622                         dev_info(&adapter->dev->dev, "channel[%d] is raid\n",
3623                                         i);
3624                 }
3625                 else {
3626                         dev_info(&adapter->dev->dev, "channel[%d] is scsi\n",
3627                                         i);
3628                 }
3629         }
3630
3631         return;
3632 }
3633
3634
3635 /**
3636  * mega_get_boot_drv()
3637  * @adapter: pointer to our soft state
3638  *
3639  * Find out which device is the boot device. Note, any logical drive or any
3640  * phyical device (e.g., a CDROM) can be designated as a boot device.
3641  */
3642 static void
3643 mega_get_boot_drv(adapter_t *adapter)
3644 {
3645         struct private_bios_data        *prv_bios_data;
3646         struct mbox_out mbox;
3647         unsigned char   *raw_mbox = (u8 *)&mbox;
3648         u16     cksum = 0;
3649         u8      *cksum_p;
3650         u8      boot_pdrv;
3651         int     i;
3652
3653         memset(&mbox, 0, sizeof(mbox));
3654
3655         raw_mbox[0] = BIOS_PVT_DATA;
3656         raw_mbox[2] = GET_BIOS_PVT_DATA;
3657
3658         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3659
3660         mbox.xferaddr = (u32)adapter->buf_dma_handle;
3661
3662         adapter->boot_ldrv_enabled = 0;
3663         adapter->boot_ldrv = 0;
3664
3665         adapter->boot_pdrv_enabled = 0;
3666         adapter->boot_pdrv_ch = 0;
3667         adapter->boot_pdrv_tgt = 0;
3668
3669         if(issue_scb_block(adapter, raw_mbox) == 0) {
3670                 prv_bios_data =
3671                         (struct private_bios_data *)adapter->mega_buffer;
3672
3673                 cksum = 0;
3674                 cksum_p = (char *)prv_bios_data;
3675                 for (i = 0; i < 14; i++ ) {
3676                         cksum += (u16)(*cksum_p++);
3677                 }
3678
3679                 if (prv_bios_data->cksum == (u16)(0-cksum) ) {
3680
3681                         /*
3682                          * If MSB is set, a physical drive is set as boot
3683                          * device
3684                          */
3685                         if( prv_bios_data->boot_drv & 0x80 ) {
3686                                 adapter->boot_pdrv_enabled = 1;
3687                                 boot_pdrv = prv_bios_data->boot_drv & 0x7F;
3688                                 adapter->boot_pdrv_ch = boot_pdrv / 16;
3689                                 adapter->boot_pdrv_tgt = boot_pdrv % 16;
3690                         }
3691                         else {
3692                                 adapter->boot_ldrv_enabled = 1;
3693                                 adapter->boot_ldrv = prv_bios_data->boot_drv;
3694                         }
3695                 }
3696         }
3697
3698 }
3699
3700 /**
3701  * mega_support_random_del()
3702  * @adapter: pointer to our soft state
3703  *
3704  * Find out if this controller supports random deletion and addition of
3705  * logical drives
3706  */
3707 static int
3708 mega_support_random_del(adapter_t *adapter)
3709 {
3710         struct mbox_out mbox;
3711         unsigned char   *raw_mbox = (u8 *)&mbox;
3712         int rval;
3713
3714         memset(&mbox, 0, sizeof(mbox));
3715
3716         /*
3717          * issue command
3718          */
3719         raw_mbox[0] = FC_DEL_LOGDRV;
3720         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3721
3722         rval = issue_scb_block(adapter, raw_mbox);
3723
3724         return !rval;
3725 }
3726
3727
3728 /**
3729  * mega_support_ext_cdb()
3730  * @adapter: pointer to our soft state
3731  *
3732  * Find out if this firmware support cdblen > 10
3733  */
3734 static int
3735 mega_support_ext_cdb(adapter_t *adapter)
3736 {
3737         struct mbox_out mbox;
3738         unsigned char   *raw_mbox = (u8 *)&mbox;
3739         int rval;
3740
3741         memset(&mbox, 0, sizeof(mbox));
3742         /*
3743          * issue command to find out if controller supports extended CDBs.
3744          */
3745         raw_mbox[0] = 0xA4;
3746         raw_mbox[2] = 0x16;
3747
3748         rval = issue_scb_block(adapter, raw_mbox);
3749
3750         return !rval;
3751 }
3752
3753
3754 /**
3755  * mega_del_logdrv()
3756  * @adapter: pointer to our soft state
3757  * @logdrv: logical drive to be deleted
3758  *
3759  * Delete the specified logical drive. It is the responsibility of the user
3760  * app to let the OS know about this operation.
3761  */
3762 static int
3763 mega_del_logdrv(adapter_t *adapter, int logdrv)
3764 {
3765         unsigned long flags;
3766         scb_t *scb;
3767         int rval;
3768
3769         /*
3770          * Stop sending commands to the controller, queue them internally.
3771          * When deletion is complete, ISR will flush the queue.
3772          */
3773         atomic_set(&adapter->quiescent, 1);
3774
3775         /*
3776          * Wait till all the issued commands are complete and there are no
3777          * commands in the pending queue
3778          */
3779         while (atomic_read(&adapter->pend_cmds) > 0 ||
3780                !list_empty(&adapter->pending_list))
3781                 msleep(1000);   /* sleep for 1s */
3782
3783         rval = mega_do_del_logdrv(adapter, logdrv);
3784
3785         spin_lock_irqsave(&adapter->lock, flags);
3786
3787         /*
3788          * If delete operation was successful, add 0x80 to the logical drive
3789          * ids for commands in the pending queue.
3790          */
3791         if (adapter->read_ldidmap) {
3792                 struct list_head *pos;
3793                 list_for_each(pos, &adapter->pending_list) {
3794                         scb = list_entry(pos, scb_t, list);
3795                         if (scb->pthru->logdrv < 0x80 )
3796                                 scb->pthru->logdrv += 0x80;
3797                 }
3798         }
3799
3800         atomic_set(&adapter->quiescent, 0);
3801
3802         mega_runpendq(adapter);
3803
3804         spin_unlock_irqrestore(&adapter->lock, flags);
3805
3806         return rval;
3807 }
3808
3809
3810 static int
3811 mega_do_del_logdrv(adapter_t *adapter, int logdrv)
3812 {
3813         megacmd_t       mc;
3814         int     rval;
3815
3816         memset( &mc, 0, sizeof(megacmd_t));
3817
3818         mc.cmd = FC_DEL_LOGDRV;
3819         mc.opcode = OP_DEL_LOGDRV;
3820         mc.subopcode = logdrv;
3821
3822         rval = mega_internal_command(adapter, &mc, NULL);
3823
3824         /* log this event */
3825         if(rval) {
3826                 dev_warn(&adapter->dev->dev, "Delete LD-%d failed", logdrv);
3827                 return rval;
3828         }
3829
3830         /*
3831          * After deleting first logical drive, the logical drives must be
3832          * addressed by adding 0x80 to the logical drive id.
3833          */
3834         adapter->read_ldidmap = 1;
3835
3836         return rval;
3837 }
3838
3839
3840 /**
3841  * mega_get_max_sgl()
3842  * @adapter: pointer to our soft state
3843  *
3844  * Find out the maximum number of scatter-gather elements supported by this
3845  * version of the firmware
3846  */
3847 static void
3848 mega_get_max_sgl(adapter_t *adapter)
3849 {
3850         struct mbox_out mbox;
3851         unsigned char   *raw_mbox = (u8 *)&mbox;
3852
3853         memset(&mbox, 0, sizeof(mbox));
3854
3855         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3856
3857         mbox.xferaddr = (u32)adapter->buf_dma_handle;
3858
3859         raw_mbox[0] = MAIN_MISC_OPCODE;
3860         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3861
3862
3863         if( issue_scb_block(adapter, raw_mbox) ) {
3864                 /*
3865                  * f/w does not support this command. Choose the default value
3866                  */
3867                 adapter->sglen = MIN_SGLIST;
3868         }
3869         else {
3870                 adapter->sglen = *((char *)adapter->mega_buffer);
3871
3872                 /*
3873                  * Make sure this is not more than the resources we are
3874                  * planning to allocate
3875                  */
3876                 if ( adapter->sglen > MAX_SGLIST )
3877                         adapter->sglen = MAX_SGLIST;
3878         }
3879
3880         return;
3881 }
3882
3883
3884 /**
3885  * mega_support_cluster()
3886  * @adapter: pointer to our soft state
3887  *
3888  * Find out if this firmware support cluster calls.
3889  */
3890 static int
3891 mega_support_cluster(adapter_t *adapter)
3892 {
3893         struct mbox_out mbox;
3894         unsigned char   *raw_mbox = (u8 *)&mbox;
3895
3896         memset(&mbox, 0, sizeof(mbox));
3897
3898         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3899
3900         mbox.xferaddr = (u32)adapter->buf_dma_handle;
3901
3902         /*
3903          * Try to get the initiator id. This command will succeed iff the
3904          * clustering is available on this HBA.
3905          */
3906         raw_mbox[0] = MEGA_GET_TARGET_ID;
3907
3908         if( issue_scb_block(adapter, raw_mbox) == 0 ) {
3909
3910                 /*
3911                  * Cluster support available. Get the initiator target id.
3912                  * Tell our id to mid-layer too.
3913                  */
3914                 adapter->this_id = *(u32 *)adapter->mega_buffer;
3915                 adapter->host->this_id = adapter->this_id;
3916
3917                 return 1;
3918         }
3919
3920         return 0;
3921 }
3922
3923 #ifdef CONFIG_PROC_FS
3924 /**
3925  * mega_adapinq()
3926  * @adapter: pointer to our soft state
3927  * @dma_handle: DMA address of the buffer
3928  *
3929  * Issue internal commands while interrupts are available.
3930  * We only issue direct mailbox commands from within the driver. ioctl()
3931  * interface using these routines can issue passthru commands.
3932  */
3933 static int
3934 mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle)
3935 {
3936         megacmd_t       mc;
3937
3938         memset(&mc, 0, sizeof(megacmd_t));
3939
3940         if( adapter->flag & BOARD_40LD ) {
3941                 mc.cmd = FC_NEW_CONFIG;
3942                 mc.opcode = NC_SUBOP_ENQUIRY3;
3943                 mc.subopcode = ENQ3_GET_SOLICITED_FULL;
3944         }
3945         else {
3946                 mc.cmd = MEGA_MBOXCMD_ADPEXTINQ;
3947         }
3948
3949         mc.xferaddr = (u32)dma_handle;
3950
3951         if ( mega_internal_command(adapter, &mc, NULL) != 0 ) {
3952                 return -1;
3953         }
3954
3955         return 0;
3956 }
3957
3958
3959 /**
3960  * mega_internal_dev_inquiry()
3961  * @adapter: pointer to our soft state
3962  * @ch: channel for this device
3963  * @tgt: ID of this device
3964  * @buf_dma_handle: DMA address of the buffer
3965  *
3966  * Issue the scsi inquiry for the specified device.
3967  */
3968 static int
3969 mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt,
3970                 dma_addr_t buf_dma_handle)
3971 {
3972         mega_passthru   *pthru;
3973         dma_addr_t      pthru_dma_handle;
3974         megacmd_t       mc;
3975         int             rval;
3976         struct pci_dev  *pdev;
3977
3978
3979         /*
3980          * For all internal commands, the buffer must be allocated in <4GB
3981          * address range
3982          */
3983         if( make_local_pdev(adapter, &pdev) != 0 ) return -1;
3984
3985         pthru = dma_alloc_coherent(&pdev->dev, sizeof(mega_passthru),
3986                                    &pthru_dma_handle, GFP_KERNEL);
3987
3988         if( pthru == NULL ) {
3989                 free_local_pdev(pdev);
3990                 return -1;
3991         }
3992
3993         pthru->timeout = 2;
3994         pthru->ars = 1;
3995         pthru->reqsenselen = 14;
3996         pthru->islogical = 0;
3997
3998         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch;
3999
4000         pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt;
4001
4002         pthru->cdblen = 6;
4003
4004         pthru->cdb[0] = INQUIRY;
4005         pthru->cdb[1] = 0;
4006         pthru->cdb[2] = 0;
4007         pthru->cdb[3] = 0;
4008         pthru->cdb[4] = 255;
4009         pthru->cdb[5] = 0;
4010
4011
4012         pthru->dataxferaddr = (u32)buf_dma_handle;
4013         pthru->dataxferlen = 256;
4014
4015         memset(&mc, 0, sizeof(megacmd_t));
4016
4017         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
4018         mc.xferaddr = (u32)pthru_dma_handle;
4019
4020         rval = mega_internal_command(adapter, &mc, pthru);
4021
4022         dma_free_coherent(&pdev->dev, sizeof(mega_passthru), pthru,
4023                           pthru_dma_handle);
4024
4025         free_local_pdev(pdev);
4026
4027         return rval;
4028 }
4029 #endif
4030
4031 /**
4032  * mega_internal_command()
4033  * @adapter: pointer to our soft state
4034  * @mc: the mailbox command
4035  * @pthru: Passthru structure for DCDB commands
4036  *
4037  * Issue the internal commands in interrupt mode.
4038  * The last argument is the address of the passthru structure if the command
4039  * to be fired is a passthru command
4040  *
4041  * Note: parameter 'pthru' is null for non-passthru commands.
4042  */
4043 static int
4044 mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
4045 {
4046         unsigned long flags;
4047         scb_t   *scb;
4048         int     rval;
4049
4050         /*
4051          * The internal commands share one command id and hence are
4052          * serialized. This is so because we want to reserve maximum number of
4053          * available command ids for the I/O commands.
4054          */
4055         mutex_lock(&adapter->int_mtx);
4056
4057         scb = &adapter->int_scb;
4058         memset(scb, 0, sizeof(scb_t));
4059
4060         scb->idx = CMDID_INT_CMDS;
4061         scb->state |= SCB_ACTIVE | SCB_PENDQ;
4062
4063         memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
4064
4065         /*
4066          * Is it a passthru command
4067          */
4068         if (mc->cmd == MEGA_MBOXCMD_PASSTHRU)
4069                 scb->pthru = pthru;
4070
4071         spin_lock_irqsave(&adapter->lock, flags);
4072         list_add_tail(&scb->list, &adapter->pending_list);
4073         /*
4074          * Check if the HBA is in quiescent state, e.g., during a
4075          * delete logical drive opertion. If it is, don't run
4076          * the pending_list.
4077          */
4078         if (atomic_read(&adapter->quiescent) == 0)
4079                 mega_runpendq(adapter);
4080         spin_unlock_irqrestore(&adapter->lock, flags);
4081
4082         wait_for_completion(&adapter->int_waitq);
4083
4084         mc->status = rval = adapter->int_status;
4085
4086         /*
4087          * Print a debug message for all failed commands. Applications can use
4088          * this information.
4089          */
4090         if (rval && trace_level) {
4091                 dev_info(&adapter->dev->dev, "cmd [%x, %x, %x] status:[%x]\n",
4092                         mc->cmd, mc->opcode, mc->subopcode, rval);
4093         }
4094
4095         mutex_unlock(&adapter->int_mtx);
4096         return rval;
4097 }
4098
4099 static const struct scsi_host_template megaraid_template = {
4100         .module                         = THIS_MODULE,
4101         .name                           = "MegaRAID",
4102         .proc_name                      = "megaraid_legacy",
4103         .info                           = megaraid_info,
4104         .queuecommand                   = megaraid_queue,
4105         .bios_param                     = megaraid_biosparam,
4106         .max_sectors                    = MAX_SECTORS_PER_IO,
4107         .can_queue                      = MAX_COMMANDS,
4108         .this_id                        = DEFAULT_INITIATOR_ID,
4109         .sg_tablesize                   = MAX_SGLIST,
4110         .cmd_per_lun                    = DEF_CMD_PER_LUN,
4111         .eh_abort_handler               = megaraid_abort,
4112         .eh_host_reset_handler          = megaraid_reset,
4113         .no_write_same                  = 1,
4114         .cmd_size                       = sizeof(struct megaraid_cmd_priv),
4115 };
4116
4117 static int
4118 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
4119 {
4120         struct Scsi_Host *host;
4121         adapter_t *adapter;
4122         unsigned long mega_baseport, tbase, flag = 0;
4123         u16 subsysid, subsysvid;
4124         u8 pci_bus, pci_dev_func;
4125         int irq, i, j;
4126         int error = -ENODEV;
4127
4128         if (hba_count >= MAX_CONTROLLERS)
4129                 goto out;
4130
4131         if (pci_enable_device(pdev))
4132                 goto out;
4133         pci_set_master(pdev);
4134
4135         pci_bus = pdev->bus->number;
4136         pci_dev_func = pdev->devfn;
4137
4138         /*
4139          * The megaraid3 stuff reports the ID of the Intel part which is not
4140          * remotely specific to the megaraid
4141          */
4142         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
4143                 u16 magic;
4144                 /*
4145                  * Don't fall over the Compaq management cards using the same
4146                  * PCI identifier
4147                  */
4148                 if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
4149                     pdev->subsystem_device == 0xC000)
4150                         goto out_disable_device;
4151                 /* Now check the magic signature byte */
4152                 pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
4153                 if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
4154                         goto out_disable_device;
4155                 /* Ok it is probably a megaraid */
4156         }
4157
4158         /*
4159          * For these vendor and device ids, signature offsets are not
4160          * valid and 64 bit is implicit
4161          */
4162         if (id->driver_data & BOARD_64BIT)
4163                 flag |= BOARD_64BIT;
4164         else {
4165                 u32 magic64;
4166
4167                 pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
4168                 if (magic64 == HBA_SIGNATURE_64BIT)
4169                         flag |= BOARD_64BIT;
4170         }
4171
4172         subsysvid = pdev->subsystem_vendor;
4173         subsysid = pdev->subsystem_device;
4174
4175         dev_notice(&pdev->dev, "found 0x%4.04x:0x%4.04x\n",
4176                 id->vendor, id->device);
4177
4178         /* Read the base port and IRQ from PCI */
4179         mega_baseport = pci_resource_start(pdev, 0);
4180         irq = pdev->irq;
4181
4182         tbase = mega_baseport;
4183         if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
4184                 flag |= BOARD_MEMMAP;
4185
4186                 if (!request_mem_region(mega_baseport, 128, "megaraid")) {
4187                         dev_warn(&pdev->dev, "mem region busy!\n");
4188                         goto out_disable_device;
4189                 }
4190
4191                 mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
4192                 if (!mega_baseport) {
4193                         dev_warn(&pdev->dev, "could not map hba memory\n");
4194                         goto out_release_region;
4195                 }
4196         } else {
4197                 flag |= BOARD_IOMAP;
4198                 mega_baseport += 0x10;
4199
4200                 if (!request_region(mega_baseport, 16, "megaraid"))
4201                         goto out_disable_device;
4202         }
4203
4204         /* Initialize SCSI Host structure */
4205         host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
4206         if (!host)
4207                 goto out_iounmap;
4208
4209         adapter = (adapter_t *)host->hostdata;
4210         memset(adapter, 0, sizeof(adapter_t));
4211
4212         dev_notice(&pdev->dev,
4213                 "scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
4214                 host->host_no, mega_baseport, irq);
4215
4216         adapter->base = mega_baseport;
4217         if (flag & BOARD_MEMMAP)
4218                 adapter->mmio_base = (void __iomem *) mega_baseport;
4219
4220         INIT_LIST_HEAD(&adapter->free_list);
4221         INIT_LIST_HEAD(&adapter->pending_list);
4222         INIT_LIST_HEAD(&adapter->completed_list);
4223
4224         adapter->flag = flag;
4225         spin_lock_init(&adapter->lock);
4226
4227         host->cmd_per_lun = max_cmd_per_lun;
4228         host->max_sectors = max_sectors_per_io;
4229
4230         adapter->dev = pdev;
4231         adapter->host = host;
4232
4233         adapter->host->irq = irq;
4234
4235         if (flag & BOARD_MEMMAP)
4236                 adapter->host->base = tbase;
4237         else {
4238                 adapter->host->io_port = tbase;
4239                 adapter->host->n_io_port = 16;
4240         }
4241
4242         adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;
4243
4244         /*
4245          * Allocate buffer to issue internal commands.
4246          */
4247         adapter->mega_buffer = dma_alloc_coherent(&adapter->dev->dev,
4248                                                   MEGA_BUFFER_SIZE,
4249                                                   &adapter->buf_dma_handle,
4250                                                   GFP_KERNEL);
4251         if (!adapter->mega_buffer) {
4252                 dev_warn(&pdev->dev, "out of RAM\n");
4253                 goto out_host_put;
4254         }
4255
4256         adapter->scb_list = kmalloc_array(MAX_COMMANDS, sizeof(scb_t),
4257                                           GFP_KERNEL);
4258         if (!adapter->scb_list) {
4259                 dev_warn(&pdev->dev, "out of RAM\n");
4260                 goto out_free_cmd_buffer;
4261         }
4262
4263         if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
4264                                 megaraid_isr_memmapped : megaraid_isr_iomapped,
4265                                         IRQF_SHARED, "megaraid", adapter)) {
4266                 dev_warn(&pdev->dev, "Couldn't register IRQ %d!\n", irq);
4267                 goto out_free_scb_list;
4268         }
4269
4270         if (mega_setup_mailbox(adapter))
4271                 goto out_free_irq;
4272
4273         if (mega_query_adapter(adapter))
4274                 goto out_free_mbox;
4275
4276         /*
4277          * Have checks for some buggy f/w
4278          */
4279         if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
4280                 /*
4281                  * Which firmware
4282                  */
4283                 if (!strcmp(adapter->fw_version, "3.00") ||
4284                                 !strcmp(adapter->fw_version, "3.01")) {
4285
4286                         dev_warn(&pdev->dev,
4287                                 "Your card is a Dell PERC "
4288                                 "2/SC RAID controller with "
4289                                 "firmware\nmegaraid: 3.00 or 3.01.  "
4290                                 "This driver is known to have "
4291                                 "corruption issues\nmegaraid: with "
4292                                 "those firmware versions on this "
4293                                 "specific card.  In order\nmegaraid: "
4294                                 "to protect your data, please upgrade "
4295                                 "your firmware to version\nmegaraid: "
4296                                 "3.10 or later, available from the "
4297                                 "Dell Technical Support web\n"
4298                                 "megaraid: site at\nhttp://support."
4299                                 "dell.com/us/en/filelib/download/"
4300                                 "index.asp?fileid=2940\n"
4301                         );
4302                 }
4303         }
4304
4305         /*
4306          * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
4307          * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
4308          * support, since this firmware cannot handle 64 bit
4309          * addressing
4310          */
4311         if ((subsysvid == PCI_VENDOR_ID_HP) &&
4312             ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
4313                 /*
4314                  * which firmware
4315                  */
4316                 if (!strcmp(adapter->fw_version, "H01.07") ||
4317                     !strcmp(adapter->fw_version, "H01.08") ||
4318                     !strcmp(adapter->fw_version, "H01.09") ) {
4319                         dev_warn(&pdev->dev,
4320                                 "Firmware H.01.07, "
4321                                 "H.01.08, and H.01.09 on 1M/2M "
4322                                 "controllers\n"
4323                                 "do not support 64 bit "
4324                                 "addressing.\nDISABLING "
4325                                 "64 bit support.\n");
4326                         adapter->flag &= ~BOARD_64BIT;
4327                 }
4328         }
4329
4330         if (mega_is_bios_enabled(adapter))
4331                 mega_hbas[hba_count].is_bios_enabled = 1;
4332         mega_hbas[hba_count].hostdata_addr = adapter;
4333
4334         /*
4335          * Find out which channel is raid and which is scsi. This is
4336          * for ROMB support.
4337          */
4338         mega_enum_raid_scsi(adapter);
4339
4340         /*
4341          * Find out if a logical drive is set as the boot drive. If
4342          * there is one, will make that as the first logical drive.
4343          * ROMB: Do we have to boot from a physical drive. Then all
4344          * the physical drives would appear before the logical disks.
4345          * Else, all the physical drives would be exported to the mid
4346          * layer after logical drives.
4347          */
4348         mega_get_boot_drv(adapter);
4349
4350         if (adapter->boot_pdrv_enabled) {
4351                 j = adapter->product_info.nchannels;
4352                 for( i = 0; i < j; i++ )
4353                         adapter->logdrv_chan[i] = 0;
4354                 for( i = j; i < NVIRT_CHAN + j; i++ )
4355                         adapter->logdrv_chan[i] = 1;
4356         } else {
4357                 for (i = 0; i < NVIRT_CHAN; i++)
4358                         adapter->logdrv_chan[i] = 1;
4359                 for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
4360                         adapter->logdrv_chan[i] = 0;
4361                 adapter->mega_ch_class <<= NVIRT_CHAN;
4362         }
4363
4364         /*
4365          * Do we support random deletion and addition of logical
4366          * drives
4367          */
4368         adapter->read_ldidmap = 0;      /* set it after first logdrv
4369                                                    delete cmd */
4370         adapter->support_random_del = mega_support_random_del(adapter);
4371
4372         /* Initialize SCBs */
4373         if (mega_init_scb(adapter))
4374                 goto out_free_mbox;
4375
4376         /*
4377          * Reset the pending commands counter
4378          */
4379         atomic_set(&adapter->pend_cmds, 0);
4380
4381         /*
4382          * Reset the adapter quiescent flag
4383          */
4384         atomic_set(&adapter->quiescent, 0);
4385
4386         hba_soft_state[hba_count] = adapter;
4387
4388         /*
4389          * Fill in the structure which needs to be passed back to the
4390          * application when it does an ioctl() for controller related
4391          * information.
4392          */
4393         i = hba_count;
4394
4395         mcontroller[i].base = mega_baseport;
4396         mcontroller[i].irq = irq;
4397         mcontroller[i].numldrv = adapter->numldrv;
4398         mcontroller[i].pcibus = pci_bus;
4399         mcontroller[i].pcidev = id->device;
4400         mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
4401         mcontroller[i].pciid = -1;
4402         mcontroller[i].pcivendor = id->vendor;
4403         mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
4404         mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;
4405
4406
4407         /* Set the Mode of addressing to 64 bit if we can */
4408         if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
4409                 dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
4410                 adapter->has_64bit_addr = 1;
4411         } else  {
4412                 dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
4413                 adapter->has_64bit_addr = 0;
4414         }
4415
4416         mutex_init(&adapter->int_mtx);
4417         init_completion(&adapter->int_waitq);
4418
4419         adapter->this_id = DEFAULT_INITIATOR_ID;
4420         adapter->host->this_id = DEFAULT_INITIATOR_ID;
4421
4422 #if MEGA_HAVE_CLUSTERING
4423         /*
4424          * Is cluster support enabled on this controller
4425          * Note: In a cluster the HBAs ( the initiators ) will have
4426          * different target IDs and we cannot assume it to be 7. Call
4427          * to mega_support_cluster() will get the target ids also if
4428          * the cluster support is available
4429          */
4430         adapter->has_cluster = mega_support_cluster(adapter);
4431         if (adapter->has_cluster) {
4432                 dev_notice(&pdev->dev,
4433                         "Cluster driver, initiator id:%d\n",
4434                         adapter->this_id);
4435         }
4436 #endif
4437
4438         pci_set_drvdata(pdev, host);
4439
4440         mega_create_proc_entry(hba_count, mega_proc_dir_entry);
4441
4442         error = scsi_add_host(host, &pdev->dev);
4443         if (error)
4444                 goto out_free_mbox;
4445
4446         scsi_scan_host(host);
4447         hba_count++;
4448         return 0;
4449
4450  out_free_mbox:
4451         dma_free_coherent(&adapter->dev->dev, sizeof(mbox64_t),
4452                           adapter->una_mbox64, adapter->una_mbox64_dma);
4453  out_free_irq:
4454         free_irq(adapter->host->irq, adapter);
4455  out_free_scb_list:
4456         kfree(adapter->scb_list);
4457  out_free_cmd_buffer:
4458         dma_free_coherent(&adapter->dev->dev, MEGA_BUFFER_SIZE,
4459                           adapter->mega_buffer, adapter->buf_dma_handle);
4460  out_host_put:
4461         scsi_host_put(host);
4462  out_iounmap:
4463         if (flag & BOARD_MEMMAP)
4464                 iounmap((void *)mega_baseport);
4465  out_release_region:
4466         if (flag & BOARD_MEMMAP)
4467                 release_mem_region(tbase, 128);
4468         else
4469                 release_region(mega_baseport, 16);
4470  out_disable_device:
4471         pci_disable_device(pdev);
4472  out:
4473         return error;
4474 }
4475
4476 static void
4477 __megaraid_shutdown(adapter_t *adapter)
4478 {
4479         u_char  raw_mbox[sizeof(struct mbox_out)];
4480         mbox_t  *mbox = (mbox_t *)raw_mbox;
4481         int     i;
4482
4483         /* Flush adapter cache */
4484         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4485         raw_mbox[0] = FLUSH_ADAPTER;
4486
4487         free_irq(adapter->host->irq, adapter);
4488
4489         /* Issue a blocking (interrupts disabled) command to the card */
4490         issue_scb_block(adapter, raw_mbox);
4491
4492         /* Flush disks cache */
4493         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4494         raw_mbox[0] = FLUSH_SYSTEM;
4495
4496         /* Issue a blocking (interrupts disabled) command to the card */
4497         issue_scb_block(adapter, raw_mbox);
4498
4499         if (atomic_read(&adapter->pend_cmds) > 0)
4500                 dev_warn(&adapter->dev->dev, "pending commands!!\n");
4501
4502         /*
4503          * Have a delibrate delay to make sure all the caches are
4504          * actually flushed.
4505          */
4506         for (i = 0; i <= 10; i++)
4507                 mdelay(1000);
4508 }
4509
4510 static void
4511 megaraid_remove_one(struct pci_dev *pdev)
4512 {
4513         struct Scsi_Host *host = pci_get_drvdata(pdev);
4514         adapter_t *adapter = (adapter_t *)host->hostdata;
4515         char buf[12] = { 0 };
4516
4517         scsi_remove_host(host);
4518
4519         __megaraid_shutdown(adapter);
4520
4521         /* Free our resources */
4522         if (adapter->flag & BOARD_MEMMAP) {
4523                 iounmap((void *)adapter->base);
4524                 release_mem_region(adapter->host->base, 128);
4525         } else
4526                 release_region(adapter->base, 16);
4527
4528         mega_free_sgl(adapter);
4529
4530         sprintf(buf, "hba%d", adapter->host->host_no);
4531         remove_proc_subtree(buf, mega_proc_dir_entry);
4532
4533         dma_free_coherent(&adapter->dev->dev, MEGA_BUFFER_SIZE,
4534                           adapter->mega_buffer, adapter->buf_dma_handle);
4535         kfree(adapter->scb_list);
4536         dma_free_coherent(&adapter->dev->dev, sizeof(mbox64_t),
4537                           adapter->una_mbox64, adapter->una_mbox64_dma);
4538
4539         scsi_host_put(host);
4540         pci_disable_device(pdev);
4541
4542         hba_count--;
4543 }
4544
4545 static void
4546 megaraid_shutdown(struct pci_dev *pdev)
4547 {
4548         struct Scsi_Host *host = pci_get_drvdata(pdev);
4549         adapter_t *adapter = (adapter_t *)host->hostdata;
4550
4551         __megaraid_shutdown(adapter);
4552 }
4553
4554 static struct pci_device_id megaraid_pci_tbl[] = {
4555         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID,
4556                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4557         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2,
4558                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4559         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3,
4560                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4561         {0,}
4562 };
4563 MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl);
4564
4565 static struct pci_driver megaraid_pci_driver = {
4566         .name           = "megaraid_legacy",
4567         .id_table       = megaraid_pci_tbl,
4568         .probe          = megaraid_probe_one,
4569         .remove         = megaraid_remove_one,
4570         .shutdown       = megaraid_shutdown,
4571 };
4572
4573 static int __init megaraid_init(void)
4574 {
4575         int error;
4576
4577         if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN))
4578                 max_cmd_per_lun = MAX_CMD_PER_LUN;
4579         if (max_mbox_busy_wait > MBOX_BUSY_WAIT)
4580                 max_mbox_busy_wait = MBOX_BUSY_WAIT;
4581
4582 #ifdef CONFIG_PROC_FS
4583         mega_proc_dir_entry = proc_mkdir("megaraid", NULL);
4584         if (!mega_proc_dir_entry) {
4585                 printk(KERN_WARNING
4586                                 "megaraid: failed to create megaraid root\n");
4587         }
4588 #endif
4589         error = pci_register_driver(&megaraid_pci_driver);
4590         if (error) {
4591 #ifdef CONFIG_PROC_FS
4592                 remove_proc_entry("megaraid", NULL);
4593 #endif
4594                 return error;
4595         }
4596
4597         /*
4598          * Register the driver as a character device, for applications
4599          * to access it for ioctls.
4600          * First argument (major) to register_chrdev implies a dynamic
4601          * major number allocation.
4602          */
4603         major = register_chrdev(0, "megadev_legacy", &megadev_fops);
4604         if (major < 0) {
4605                 printk(KERN_WARNING
4606                                 "megaraid: failed to register char device\n");
4607         }
4608
4609         return 0;
4610 }
4611
4612 static void __exit megaraid_exit(void)
4613 {
4614         /*
4615          * Unregister the character device interface to the driver.
4616          */
4617         unregister_chrdev(major, "megadev_legacy");
4618
4619         pci_unregister_driver(&megaraid_pci_driver);
4620
4621 #ifdef CONFIG_PROC_FS
4622         remove_proc_entry("megaraid", NULL);
4623 #endif
4624 }
4625
4626 module_init(megaraid_init);
4627 module_exit(megaraid_exit);
4628
4629 /* vi: set ts=8 sw=8 tw=78: */