drivers/scsi/megaraid.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *
   4  *                      Linux MegaRAID device driver
   5  *
   6  * Copyright (c) 2002  LSI Logic Corporation.
   7  *
   8  * Copyright (c) 2002  Red Hat, Inc. All rights reserved.
   9  *        - fixes
  10  *        - speed-ups (list handling fixes, issued_list, optimizations.)
  11  *        - lots of cleanups.
  12  *
  13  * Copyright (c) 2003  Christoph Hellwig  <hch@lst.de>
  14  *        - new-style, hotplug-aware pci probing and scsi registration
  15  *
  16  * Version : v2.00.4 Mon Nov 14 14:02:43 EST 2005 - Seokmann Ju
  17  *                                              <Seokmann.Ju@lsil.com>
  18  *
  19  * Description: Linux device driver for LSI Logic MegaRAID controller
  20  *
  21  * Supported controllers: MegaRAID 418, 428, 438, 466, 762, 467, 471, 490, 493
  22  *                                      518, 520, 531, 532
  23  *
  24  * This driver is supported by LSI Logic, with assistance from Red Hat, Dell,
  25  * and others. Please send updates to the mailing list
  26  * linux-scsi@vger.kernel.org .
  27  */
  28
  29 #include <linux/mm.h>
  30 #include <linux/fs.h>
  31 #include <linux/blkdev.h>
  32 #include <linux/uaccess.h>
  33 #include <asm/io.h>
  34 #include <linux/completion.h>
  35 #include <linux/delay.h>
  36 #include <linux/proc_fs.h>
  37 #include <linux/seq_file.h>
  38 #include <linux/reboot.h>
  39 #include <linux/module.h>
  40 #include <linux/list.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/pci.h>
  43 #include <linux/init.h>
  44 #include <linux/dma-mapping.h>
  45 #include <linux/mutex.h>
  46 #include <linux/slab.h>
  47 #include <scsi/scsicam.h>
  48
  49 #include "scsi.h"
  50 #include <scsi/scsi_host.h>
  51
  52 #include "megaraid.h"
  53
  54 #define MEGARAID_MODULE_VERSION "2.00.4"
  55
  56 MODULE_AUTHOR ("sju@lsil.com");
  57 MODULE_DESCRIPTION ("LSI Logic MegaRAID legacy driver");
  58 MODULE_LICENSE ("GPL");
  59 MODULE_VERSION(MEGARAID_MODULE_VERSION);
  60
  61 static DEFINE_MUTEX(megadev_mutex);
  62 static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
  63 module_param(max_cmd_per_lun, uint, 0);
  64 MODULE_PARM_DESC(max_cmd_per_lun, "Maximum number of commands which can be issued to a single LUN (default=DEF_CMD_PER_LUN=63)");
  65
  66 static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO;
  67 module_param(max_sectors_per_io, ushort, 0);
  68 MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)");
  69
  70
  71 static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT;
  72 module_param(max_mbox_busy_wait, ushort, 0);
  73 MODULE_PARM_DESC(max_mbox_busy_wait, "Maximum wait for mailbox in microseconds if busy (default=MBOX_BUSY_WAIT=10)");
  74
  75 #define RDINDOOR(adapter)       readl((adapter)->mmio_base + 0x20)
  76 #define RDOUTDOOR(adapter)      readl((adapter)->mmio_base + 0x2C)
  77 #define WRINDOOR(adapter,value)  writel(value, (adapter)->mmio_base + 0x20)
  78 #define WROUTDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x2C)
  79
  80 /*
  81  * Global variables
  82  */
  83
  84 static int hba_count;
  85 static adapter_t *hba_soft_state[MAX_CONTROLLERS];
  86 static struct proc_dir_entry *mega_proc_dir_entry;
  87
  88 /* For controller re-ordering */
  89 static struct mega_hbas mega_hbas[MAX_CONTROLLERS];
  90
  91 static long
  92 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
  93
  94 /*
  95  * The File Operations structure for the serial/ioctl interface of the driver
  96  */
  97 static const struct file_operations megadev_fops = {
  98         .owner          = THIS_MODULE,
  99         .unlocked_ioctl = megadev_unlocked_ioctl,
 100         .open           = megadev_open,
 101         .llseek         = noop_llseek,
 102 };
 103
 104 /*
 105  * Array to structures for storing the information about the controllers. This
 106  * information is sent to the user level applications, when they do an ioctl
 107  * for this information.
 108  */
 109 static struct mcontroller mcontroller[MAX_CONTROLLERS];
 110
 111 /* The current driver version */
 112 static u32 driver_ver = 0x02000000;
 113
 114 /* major number used by the device for character interface */
 115 static int major;
 116
 117 #define IS_RAID_CH(hba, ch)     (((hba)->mega_ch_class >> (ch)) & 0x01)
 118
 119
 120 /*
 121  * Debug variable to print some diagnostic messages
 122  */
 123 static int trace_level;
 124
 125 /**
 126  * mega_setup_mailbox()
 127  * @adapter: pointer to our soft state
 128  *
 129  * Allocates a 8 byte aligned memory for the handshake mailbox.
 130  */
 131 static int
 132 mega_setup_mailbox(adapter_t *adapter)
 133 {
 134         unsigned long   align;
 135
 136         adapter->una_mbox64 = dma_alloc_coherent(&adapter->dev->dev,
 137                                                  sizeof(mbox64_t),
 138                                                  &adapter->una_mbox64_dma,
 139                                                  GFP_KERNEL);
 140
 141         if( !adapter->una_mbox64 ) return -1;
 142
 143         adapter->mbox = &adapter->una_mbox64->mbox;
 144
 145         adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) &
 146                         (~0UL ^ 0xFUL));
 147
 148         adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8);
 149
 150         align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox);
 151
 152         adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align;
 153
 154         /*
 155          * Register the mailbox if the controller is an io-mapped controller
 156          */
 157         if( adapter->flag & BOARD_IOMAP ) {
 158
 159                 outb(adapter->mbox_dma & 0xFF,
 160                                 adapter->host->io_port + MBOX_PORT0);
 161
 162                 outb((adapter->mbox_dma >> 8) & 0xFF,
 163                                 adapter->host->io_port + MBOX_PORT1);
 164
 165                 outb((adapter->mbox_dma >> 16) & 0xFF,
 166                                 adapter->host->io_port + MBOX_PORT2);
 167
 168                 outb((adapter->mbox_dma >> 24) & 0xFF,
 169                                 adapter->host->io_port + MBOX_PORT3);
 170
 171                 outb(ENABLE_MBOX_BYTE,
 172                                 adapter->host->io_port + ENABLE_MBOX_REGION);
 173
 174                 irq_ack(adapter);
 175
 176                 irq_enable(adapter);
 177         }
 178
 179         return 0;
 180 }
 181
 182
 183 /*
 184  * mega_query_adapter()
 185  * @adapter - pointer to our soft state
 186  *
 187  * Issue the adapter inquiry commands to the controller and find out
 188  * information and parameter about the devices attached
 189  */
 190 static int
 191 mega_query_adapter(adapter_t *adapter)
 192 {
 193         dma_addr_t      prod_info_dma_handle;
 194         mega_inquiry3   *inquiry3;
 195         u8      raw_mbox[sizeof(struct mbox_out)];
 196         mbox_t  *mbox;
 197         int     retval;
 198
 199         /* Initialize adapter inquiry mailbox */
 200
 201         mbox = (mbox_t *)raw_mbox;
 202
 203         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
 204         memset(&mbox->m_out, 0, sizeof(raw_mbox));
 205
 206         /*
 207          * Try to issue Inquiry3 command
 208          * if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
 209          * update enquiry3 structure
 210          */
 211         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
 212
 213         inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;
 214
 215         raw_mbox[0] = FC_NEW_CONFIG;            /* i.e. mbox->cmd=0xA1 */
 216         raw_mbox[2] = NC_SUBOP_ENQUIRY3;        /* i.e. 0x0F */
 217         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;  /* i.e. 0x02 */
 218
 219         /* Issue a blocking command to the card */
 220         if ((retval = issue_scb_block(adapter, raw_mbox))) {
 221                 /* the adapter does not support 40ld */
 222
 223                 mraid_ext_inquiry       *ext_inq;
 224                 mraid_inquiry           *inq;
 225                 dma_addr_t              dma_handle;
 226
 227                 ext_inq = dma_alloc_coherent(&adapter->dev->dev,
 228                                              sizeof(mraid_ext_inquiry),
 229                                              &dma_handle, GFP_KERNEL);
 230
 231                 if( ext_inq == NULL ) return -1;
 232
 233                 inq = &ext_inq->raid_inq;
 234
 235                 mbox->m_out.xferaddr = (u32)dma_handle;
 236
 237                 /*issue old 0x04 command to adapter */
 238                 mbox->m_out.cmd = MEGA_MBOXCMD_ADPEXTINQ;
 239
 240                 issue_scb_block(adapter, raw_mbox);
 241
 242                 /*
 243                  * update Enquiry3 and ProductInfo structures with
 244                  * mraid_inquiry structure
 245                  */
 246                 mega_8_to_40ld(inq, inquiry3,
 247                                 (mega_product_info *)&adapter->product_info);
 248
 249                 dma_free_coherent(&adapter->dev->dev,
 250                                   sizeof(mraid_ext_inquiry), ext_inq,
 251                                   dma_handle);
 252
 253         } else {                /*adapter supports 40ld */
 254                 adapter->flag |= BOARD_40LD;
 255
 256                 /*
 257                  * get product_info, which is static information and will be
 258                  * unchanged
 259                  */
 260                 prod_info_dma_handle = dma_map_single(&adapter->dev->dev,
 261                                                       (void *)&adapter->product_info,
 262                                                       sizeof(mega_product_info),
 263                                                       DMA_FROM_DEVICE);
 264
 265                 mbox->m_out.xferaddr = prod_info_dma_handle;
 266
 267                 raw_mbox[0] = FC_NEW_CONFIG;    /* i.e. mbox->cmd=0xA1 */
 268                 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;    /* i.e. 0x0E */
 269
 270                 if ((retval = issue_scb_block(adapter, raw_mbox)))
 271                         dev_warn(&adapter->dev->dev,
 272                                 "Product_info cmd failed with error: %d\n",
 273                                 retval);
 274
 275                 dma_unmap_single(&adapter->dev->dev, prod_info_dma_handle,
 276                                  sizeof(mega_product_info), DMA_FROM_DEVICE);
 277         }
 278
 279
 280         /*
 281          * kernel scans the channels from 0 to <= max_channel
 282          */
 283         adapter->host->max_channel =
 284                 adapter->product_info.nchannels + NVIRT_CHAN -1;
 285
 286         adapter->host->max_id = 16;     /* max targets per channel */
 287
 288         adapter->host->max_lun = 7;     /* Up to 7 luns for non disk devices */
 289
 290         adapter->host->cmd_per_lun = max_cmd_per_lun;
 291
 292         adapter->numldrv = inquiry3->num_ldrv;
 293
 294         adapter->max_cmds = adapter->product_info.max_commands;
 295
 296         if(adapter->max_cmds > MAX_COMMANDS)
 297                 adapter->max_cmds = MAX_COMMANDS;
 298
 299         adapter->host->can_queue = adapter->max_cmds - 1;
 300
 301         /*
 302          * Get the maximum number of scatter-gather elements supported by this
 303          * firmware
 304          */
 305         mega_get_max_sgl(adapter);
 306
 307         adapter->host->sg_tablesize = adapter->sglen;
 308
 309         /* use HP firmware and bios version encoding
 310            Note: fw_version[0|1] and bios_version[0|1] were originally shifted
 311            right 8 bits making them zero. This 0 value was hardcoded to fix
 312            sparse warnings. */
 313         if (adapter->product_info.subsysvid == PCI_VENDOR_ID_HP) {
 314                 snprintf(adapter->fw_version, sizeof(adapter->fw_version),
 315                          "%c%d%d.%d%d",
 316                          adapter->product_info.fw_version[2],
 317                          0,
 318                          adapter->product_info.fw_version[1] & 0x0f,
 319                          0,
 320                          adapter->product_info.fw_version[0] & 0x0f);
 321                 snprintf(adapter->bios_version, sizeof(adapter->fw_version),
 322                          "%c%d%d.%d%d",
 323                          adapter->product_info.bios_version[2],
 324                          0,
 325                          adapter->product_info.bios_version[1] & 0x0f,
 326                          0,
 327                          adapter->product_info.bios_version[0] & 0x0f);
 328         } else {
 329                 memcpy(adapter->fw_version,
 330                                 (char *)adapter->product_info.fw_version, 4);
 331                 adapter->fw_version[4] = 0;
 332
 333                 memcpy(adapter->bios_version,
 334                                 (char *)adapter->product_info.bios_version, 4);
 335
 336                 adapter->bios_version[4] = 0;
 337         }
 338
 339         dev_notice(&adapter->dev->dev, "[%s:%s] detected %d logical drives\n",
 340                 adapter->fw_version, adapter->bios_version, adapter->numldrv);
 341
 342         /*
 343          * Do we support extended (>10 bytes) cdbs
 344          */
 345         adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
 346         if (adapter->support_ext_cdb)
 347                 dev_notice(&adapter->dev->dev, "supports extended CDBs\n");
 348
 349
 350         return 0;
 351 }
 352
 353 /**
 354  * mega_runpendq()
 355  * @adapter: pointer to our soft state
 356  *
 357  * Runs through the list of pending requests.
 358  */
 359 static inline void
 360 mega_runpendq(adapter_t *adapter)
 361 {
 362         if(!list_empty(&adapter->pending_list))
 363                 __mega_runpendq(adapter);
 364 }
 365
 366 /*
 367  * megaraid_queue()
 368  * @scmd - Issue this scsi command
 369  * @done - the callback hook into the scsi mid-layer
 370  *
 371  * The command queuing entry point for the mid-layer.
 372  */
 373 static int
 374 megaraid_queue_lck(struct scsi_cmnd *scmd, void (*done)(struct scsi_cmnd *))
 375 {
 376         adapter_t       *adapter;
 377         scb_t   *scb;
 378         int     busy=0;
 379         unsigned long flags;
 380
 381         adapter = (adapter_t *)scmd->device->host->hostdata;
 382
 383         scmd->scsi_done = done;
 384
 385
 386         /*
 387          * Allocate and build a SCB request
 388          * busy flag will be set if mega_build_cmd() command could not
 389          * allocate scb. We will return non-zero status in that case.
 390          * NOTE: scb can be null even though certain commands completed
 391          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, we would
 392          * return 0 in that case.
 393          */
 394
 395         spin_lock_irqsave(&adapter->lock, flags);
 396         scb = mega_build_cmd(adapter, scmd, &busy);
 397         if (!scb)
 398                 goto out;
 399
 400         scb->state |= SCB_PENDQ;
 401         list_add_tail(&scb->list, &adapter->pending_list);
 402
 403         /*
 404          * Check if the HBA is in quiescent state, e.g., during a
 405          * delete logical drive opertion. If it is, don't run
 406          * the pending_list.
 407          */
 408         if (atomic_read(&adapter->quiescent) == 0)
 409                 mega_runpendq(adapter);
 410
 411         busy = 0;
 412  out:
 413         spin_unlock_irqrestore(&adapter->lock, flags);
 414         return busy;
 415 }
 416
 417 static DEF_SCSI_QCMD(megaraid_queue)
 418
 419 /**
 420  * mega_allocate_scb()
 421  * @adapter: pointer to our soft state
 422  * @cmd: scsi command from the mid-layer
 423  *
 424  * Allocate a SCB structure. This is the central structure for controller
 425  * commands.
 426  */
 427 static inline scb_t *
 428 mega_allocate_scb(adapter_t *adapter, struct scsi_cmnd *cmd)
 429 {
 430         struct list_head *head = &adapter->free_list;
 431         scb_t   *scb;
 432
 433         /* Unlink command from Free List */
 434         if( !list_empty(head) ) {
 435
 436                 scb = list_entry(head->next, scb_t, list);
 437
 438                 list_del_init(head->next);
 439
 440                 scb->state = SCB_ACTIVE;
 441                 scb->cmd = cmd;
 442                 scb->dma_type = MEGA_DMA_TYPE_NONE;
 443
 444                 return scb;
 445         }
 446
 447         return NULL;
 448 }
 449
 450 /**
 451  * mega_get_ldrv_num()
 452  * @adapter: pointer to our soft state
 453  * @cmd: scsi mid layer command
 454  * @channel: channel on the controller
 455  *
 456  * Calculate the logical drive number based on the information in scsi command
 457  * and the channel number.
 458  */
 459 static inline int
 460 mega_get_ldrv_num(adapter_t *adapter, struct scsi_cmnd *cmd, int channel)
 461 {
 462         int             tgt;
 463         int             ldrv_num;
 464
 465         tgt = cmd->device->id;
 466
 467         if ( tgt > adapter->this_id )
 468                 tgt--;  /* we do not get inquires for initiator id */
 469
 470         ldrv_num = (channel * 15) + tgt;
 471
 472
 473         /*
 474          * If we have a logical drive with boot enabled, project it first
 475          */
 476         if( adapter->boot_ldrv_enabled ) {
 477                 if( ldrv_num == 0 ) {
 478                         ldrv_num = adapter->boot_ldrv;
 479                 }
 480                 else {
 481                         if( ldrv_num <= adapter->boot_ldrv ) {
 482                                 ldrv_num--;
 483                         }
 484                 }
 485         }
 486
 487         /*
 488          * If "delete logical drive" feature is enabled on this controller.
 489          * Do only if at least one delete logical drive operation was done.
 490          *
 491          * Also, after logical drive deletion, instead of logical drive number,
 492          * the value returned should be 0x80+logical drive id.
 493          *
 494          * These is valid only for IO commands.
 495          */
 496
 497         if (adapter->support_random_del && adapter->read_ldidmap )
 498                 switch (cmd->cmnd[0]) {
 499                 case READ_6:
 500                 case WRITE_6:
 501                 case READ_10:
 502                 case WRITE_10:
 503                         ldrv_num += 0x80;
 504                 }
 505
 506         return ldrv_num;
 507 }
 508
 509 /**
 510  * mega_build_cmd()
 511  * @adapter: pointer to our soft state
 512  * @cmd: Prepare using this scsi command
 513  * @busy: busy flag if no resources
 514  *
 515  * Prepares a command and scatter gather list for the controller. This routine
 516  * also finds out if the commands is intended for a logical drive or a
 517  * physical device and prepares the controller command accordingly.
 518  *
 519  * We also re-order the logical drives and physical devices based on their
 520  * boot settings.
 521  */
 522 static scb_t *
 523 mega_build_cmd(adapter_t *adapter, struct scsi_cmnd *cmd, int *busy)
 524 {
 525         mega_passthru   *pthru;
 526         scb_t   *scb;
 527         mbox_t  *mbox;
 528         u32     seg;
 529         char    islogical;
 530         int     max_ldrv_num;
 531         int     channel = 0;
 532         int     target = 0;
 533         int     ldrv_num = 0;   /* logical drive number */
 534
 535         /*
 536          * We know what channels our logical drives are on - mega_find_card()
 537          */
 538         islogical = adapter->logdrv_chan[cmd->device->channel];
 539
 540         /*
 541          * The theory: If physical drive is chosen for boot, all the physical
 542          * devices are exported before the logical drives, otherwise physical
 543          * devices are pushed after logical drives, in which case - Kernel sees
 544          * the physical devices on virtual channel which is obviously converted
 545          * to actual channel on the HBA.
 546          */
 547         if( adapter->boot_pdrv_enabled ) {
 548                 if( islogical ) {
 549                         /* logical channel */
 550                         channel = cmd->device->channel -
 551                                 adapter->product_info.nchannels;
 552                 }
 553                 else {
 554                         /* this is physical channel */
 555                         channel = cmd->device->channel;
 556                         target = cmd->device->id;
 557
 558                         /*
 559                          * boot from a physical disk, that disk needs to be
 560                          * exposed first IF both the channels are SCSI, then
 561                          * booting from the second channel is not allowed.
 562                          */
 563                         if( target == 0 ) {
 564                                 target = adapter->boot_pdrv_tgt;
 565                         }
 566                         else if( target == adapter->boot_pdrv_tgt ) {
 567                                 target = 0;
 568                         }
 569                 }
 570         }
 571         else {
 572                 if( islogical ) {
 573                         /* this is the logical channel */
 574                         channel = cmd->device->channel;
 575                 }
 576                 else {
 577                         /* physical channel */
 578                         channel = cmd->device->channel - NVIRT_CHAN;
 579                         target = cmd->device->id;
 580                 }
 581         }
 582
 583
 584         if(islogical) {
 585
 586                 /* have just LUN 0 for each target on virtual channels */
 587                 if (cmd->device->lun) {
 588                         cmd->result = (DID_BAD_TARGET << 16);
 589                         cmd->scsi_done(cmd);
 590                         return NULL;
 591                 }
 592
 593                 ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);
 594
 595
 596                 max_ldrv_num = (adapter->flag & BOARD_40LD) ?
 597                         MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;
 598
 599                 /*
 600                  * max_ldrv_num increases by 0x80 if some logical drive was
 601                  * deleted.
 602                  */
 603                 if(adapter->read_ldidmap)
 604                         max_ldrv_num += 0x80;
 605
 606                 if(ldrv_num > max_ldrv_num ) {
 607                         cmd->result = (DID_BAD_TARGET << 16);
 608                         cmd->scsi_done(cmd);
 609                         return NULL;
 610                 }
 611
 612         }
 613         else {
 614                 if( cmd->device->lun > 7) {
 615                         /*
 616                          * Do not support lun >7 for physically accessed
 617                          * devices
 618                          */
 619                         cmd->result = (DID_BAD_TARGET << 16);
 620                         cmd->scsi_done(cmd);
 621                         return NULL;
 622                 }
 623         }
 624
 625         /*
 626          *
 627          * Logical drive commands
 628          *
 629          */
 630         if(islogical) {
 631                 switch (cmd->cmnd[0]) {
 632                 case TEST_UNIT_READY:
 633 #if MEGA_HAVE_CLUSTERING
 634                         /*
 635                          * Do we support clustering and is the support enabled
 636                          * If no, return success always
 637                          */
 638                         if( !adapter->has_cluster ) {
 639                                 cmd->result = (DID_OK << 16);
 640                                 cmd->scsi_done(cmd);
 641                                 return NULL;
 642                         }
 643
 644                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 645                                 *busy = 1;
 646                                 return NULL;
 647                         }
 648
 649                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 650                         scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
 651                         scb->raw_mbox[3] = ldrv_num;
 652
 653                         scb->dma_direction = DMA_NONE;
 654
 655                         return scb;
 656 #else
 657                         cmd->result = (DID_OK << 16);
 658                         cmd->scsi_done(cmd);
 659                         return NULL;
 660 #endif
 661
 662                 case MODE_SENSE: {
 663                         char *buf;
 664                         struct scatterlist *sg;
 665
 666                         sg = scsi_sglist(cmd);
 667                         buf = kmap_atomic(sg_page(sg)) + sg->offset;
 668
 669                         memset(buf, 0, cmd->cmnd[4]);
 670                         kunmap_atomic(buf - sg->offset);
 671
 672                         cmd->result = (DID_OK << 16);
 673                         cmd->scsi_done(cmd);
 674                         return NULL;
 675                 }
 676
 677                 case READ_CAPACITY:
 678                 case INQUIRY:
 679
 680                         if(!(adapter->flag & (1L << cmd->device->channel))) {
 681
 682                                 dev_notice(&adapter->dev->dev,
 683                                         "scsi%d: scanning scsi channel %d "
 684                                         "for logical drives\n",
 685                                                 adapter->host->host_no,
 686                                                 cmd->device->channel);
 687
 688                                 adapter->flag |= (1L << cmd->device->channel);
 689                         }
 690
 691                         /* Allocate a SCB and initialize passthru */
 692                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 693                                 *busy = 1;
 694                                 return NULL;
 695                         }
 696                         pthru = scb->pthru;
 697
 698                         mbox = (mbox_t *)scb->raw_mbox;
 699                         memset(mbox, 0, sizeof(scb->raw_mbox));
 700                         memset(pthru, 0, sizeof(mega_passthru));
 701
 702                         pthru->timeout = 0;
 703                         pthru->ars = 1;
 704                         pthru->reqsenselen = 14;
 705                         pthru->islogical = 1;
 706                         pthru->logdrv = ldrv_num;
 707                         pthru->cdblen = cmd->cmd_len;
 708                         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 709
 710                         if( adapter->has_64bit_addr ) {
 711                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 712                         }
 713                         else {
 714                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 715                         }
 716
 717                         scb->dma_direction = DMA_FROM_DEVICE;
 718
 719                         pthru->numsgelements = mega_build_sglist(adapter, scb,
 720                                 &pthru->dataxferaddr, &pthru->dataxferlen);
 721
 722                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 723
 724                         return scb;
 725
 726                 case READ_6:
 727                 case WRITE_6:
 728                 case READ_10:
 729                 case WRITE_10:
 730                 case READ_12:
 731                 case WRITE_12:
 732
 733                         /* Allocate a SCB and initialize mailbox */
 734                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 735                                 *busy = 1;
 736                                 return NULL;
 737                         }
 738                         mbox = (mbox_t *)scb->raw_mbox;
 739
 740                         memset(mbox, 0, sizeof(scb->raw_mbox));
 741                         mbox->m_out.logdrv = ldrv_num;
 742
 743                         /*
 744                          * A little hack: 2nd bit is zero for all scsi read
 745                          * commands and is set for all scsi write commands
 746                          */
 747                         if( adapter->has_64bit_addr ) {
 748                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 749                                         MEGA_MBOXCMD_LWRITE64:
 750                                         MEGA_MBOXCMD_LREAD64 ;
 751                         }
 752                         else {
 753                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 754                                         MEGA_MBOXCMD_LWRITE:
 755                                         MEGA_MBOXCMD_LREAD ;
 756                         }
 757
 758                         /*
 759                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
 760                          */
 761                         if( cmd->cmd_len == 6 ) {
 762                                 mbox->m_out.numsectors = (u32) cmd->cmnd[4];
 763                                 mbox->m_out.lba =
 764                                         ((u32)cmd->cmnd[1] << 16) |
 765                                         ((u32)cmd->cmnd[2] << 8) |
 766                                         (u32)cmd->cmnd[3];
 767
 768                                 mbox->m_out.lba &= 0x1FFFFF;
 769
 770 #if MEGA_HAVE_STATS
 771                                 /*
 772                                  * Take modulo 0x80, since the logical drive
 773                                  * number increases by 0x80 when a logical
 774                                  * drive was deleted
 775                                  */
 776                                 if (*cmd->cmnd == READ_6) {
 777                                         adapter->nreads[ldrv_num%0x80]++;
 778                                         adapter->nreadblocks[ldrv_num%0x80] +=
 779                                                 mbox->m_out.numsectors;
 780                                 } else {
 781                                         adapter->nwrites[ldrv_num%0x80]++;
 782                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 783                                                 mbox->m_out.numsectors;
 784                                 }
 785 #endif
 786                         }
 787
 788                         /*
 789                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
 790                          */
 791                         if( cmd->cmd_len == 10 ) {
 792                                 mbox->m_out.numsectors =
 793                                         (u32)cmd->cmnd[8] |
 794                                         ((u32)cmd->cmnd[7] << 8);
 795                                 mbox->m_out.lba =
 796                                         ((u32)cmd->cmnd[2] << 24) |
 797                                         ((u32)cmd->cmnd[3] << 16) |
 798                                         ((u32)cmd->cmnd[4] << 8) |
 799                                         (u32)cmd->cmnd[5];
 800
 801 #if MEGA_HAVE_STATS
 802                                 if (*cmd->cmnd == READ_10) {
 803                                         adapter->nreads[ldrv_num%0x80]++;
 804                                         adapter->nreadblocks[ldrv_num%0x80] +=
 805                                                 mbox->m_out.numsectors;
 806                                 } else {
 807                                         adapter->nwrites[ldrv_num%0x80]++;
 808                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 809                                                 mbox->m_out.numsectors;
 810                                 }
 811 #endif
 812                         }
 813
 814                         /*
 815                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
 816                          */
 817                         if( cmd->cmd_len == 12 ) {
 818                                 mbox->m_out.lba =
 819                                         ((u32)cmd->cmnd[2] << 24) |
 820                                         ((u32)cmd->cmnd[3] << 16) |
 821                                         ((u32)cmd->cmnd[4] << 8) |
 822                                         (u32)cmd->cmnd[5];
 823
 824                                 mbox->m_out.numsectors =
 825                                         ((u32)cmd->cmnd[6] << 24) |
 826                                         ((u32)cmd->cmnd[7] << 16) |
 827                                         ((u32)cmd->cmnd[8] << 8) |
 828                                         (u32)cmd->cmnd[9];
 829
 830 #if MEGA_HAVE_STATS
 831                                 if (*cmd->cmnd == READ_12) {
 832                                         adapter->nreads[ldrv_num%0x80]++;
 833                                         adapter->nreadblocks[ldrv_num%0x80] +=
 834                                                 mbox->m_out.numsectors;
 835                                 } else {
 836                                         adapter->nwrites[ldrv_num%0x80]++;
 837                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 838                                                 mbox->m_out.numsectors;
 839                                 }
 840 #endif
 841                         }
 842
 843                         /*
 844                          * If it is a read command
 845                          */
 846                         if( (*cmd->cmnd & 0x0F) == 0x08 ) {
 847                                 scb->dma_direction = DMA_FROM_DEVICE;
 848                         }
 849                         else {
 850                                 scb->dma_direction = DMA_TO_DEVICE;
 851                         }
 852
 853                         /* Calculate Scatter-Gather info */
 854                         mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
 855                                         (u32 *)&mbox->m_out.xferaddr, &seg);
 856
 857                         return scb;
 858
 859 #if MEGA_HAVE_CLUSTERING
 860                 case RESERVE:
 861                 case RELEASE:
 862
 863                         /*
 864                          * Do we support clustering and is the support enabled
 865                          */
 866                         if( ! adapter->has_cluster ) {
 867
 868                                 cmd->result = (DID_BAD_TARGET << 16);
 869                                 cmd->scsi_done(cmd);
 870                                 return NULL;
 871                         }
 872
 873                         /* Allocate a SCB and initialize mailbox */
 874                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 875                                 *busy = 1;
 876                                 return NULL;
 877                         }
 878
 879                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 880                         scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
 881                                 MEGA_RESERVE_LD : MEGA_RELEASE_LD;
 882
 883                         scb->raw_mbox[3] = ldrv_num;
 884
 885                         scb->dma_direction = DMA_NONE;
 886
 887                         return scb;
 888 #endif
 889
 890                 default:
 891                         cmd->result = (DID_BAD_TARGET << 16);
 892                         cmd->scsi_done(cmd);
 893                         return NULL;
 894                 }
 895         }
 896
 897         /*
 898          * Passthru drive commands
 899          */
 900         else {
 901                 /* Allocate a SCB and initialize passthru */
 902                 if(!(scb = mega_allocate_scb(adapter, cmd))) {
 903                         *busy = 1;
 904                         return NULL;
 905                 }
 906
 907                 mbox = (mbox_t *)scb->raw_mbox;
 908                 memset(mbox, 0, sizeof(scb->raw_mbox));
 909
 910                 if( adapter->support_ext_cdb ) {
 911
 912                         mega_prepare_extpassthru(adapter, scb, cmd,
 913                                         channel, target);
 914
 915                         mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;
 916
 917                         mbox->m_out.xferaddr = scb->epthru_dma_addr;
 918
 919                 }
 920                 else {
 921
 922                         pthru = mega_prepare_passthru(adapter, scb, cmd,
 923                                         channel, target);
 924
 925                         /* Initialize mailbox */
 926                         if( adapter->has_64bit_addr ) {
 927                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 928                         }
 929                         else {
 930                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 931                         }
 932
 933                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 934
 935                 }
 936                 return scb;
 937         }
 938         return NULL;
 939 }
 940
 941
 942 /**
 943  * mega_prepare_passthru()
 944  * @adapter: pointer to our soft state
 945  * @scb: our scsi control block
 946  * @cmd: scsi command from the mid-layer
 947  * @channel: actual channel on the controller
 948  * @target: actual id on the controller.
 949  *
 950  * prepare a command for the scsi physical devices.
 951  */
 952 static mega_passthru *
 953 mega_prepare_passthru(adapter_t *adapter, scb_t *scb, struct scsi_cmnd *cmd,
 954                       int channel, int target)
 955 {
 956         mega_passthru *pthru;
 957
 958         pthru = scb->pthru;
 959         memset(pthru, 0, sizeof (mega_passthru));
 960
 961         /* 0=6sec/1=60sec/2=10min/3=3hrs */
 962         pthru->timeout = 2;
 963
 964         pthru->ars = 1;
 965         pthru->reqsenselen = 14;
 966         pthru->islogical = 0;
 967
 968         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
 969
 970         pthru->target = (adapter->flag & BOARD_40LD) ?
 971                 (channel << 4) | target : target;
 972
 973         pthru->cdblen = cmd->cmd_len;
 974         pthru->logdrv = cmd->device->lun;
 975
 976         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 977
 978         /* Not sure about the direction */
 979         scb->dma_direction = DMA_BIDIRECTIONAL;
 980
 981         /* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
 982         switch (cmd->cmnd[0]) {
 983         case INQUIRY:
 984         case READ_CAPACITY:
 985                 if(!(adapter->flag & (1L << cmd->device->channel))) {
 986
 987                         dev_notice(&adapter->dev->dev,
 988                                 "scsi%d: scanning scsi channel %d [P%d] "
 989                                 "for physical devices\n",
 990                                         adapter->host->host_no,
 991                                         cmd->device->channel, channel);
 992
 993                         adapter->flag |= (1L << cmd->device->channel);
 994                 }
 995                 fallthrough;
 996         default:
 997                 pthru->numsgelements = mega_build_sglist(adapter, scb,
 998                                 &pthru->dataxferaddr, &pthru->dataxferlen);
 999                 break;
1000         }
1001         return pthru;
1002 }
1003
1004
1005 /**
1006  * mega_prepare_extpassthru()
1007  * @adapter: pointer to our soft state
1008  * @scb: our scsi control block
1009  * @cmd: scsi command from the mid-layer
1010  * @channel: actual channel on the controller
1011  * @target: actual id on the controller.
1012  *
1013  * prepare a command for the scsi physical devices. This rountine prepares
1014  * commands for devices which can take extended CDBs (>10 bytes)
1015  */
1016 static mega_ext_passthru *
1017 mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb,
1018                          struct scsi_cmnd *cmd,
1019                          int channel, int target)
1020 {
1021         mega_ext_passthru       *epthru;
1022
1023         epthru = scb->epthru;
1024         memset(epthru, 0, sizeof(mega_ext_passthru));
1025
1026         /* 0=6sec/1=60sec/2=10min/3=3hrs */
1027         epthru->timeout = 2;
1028
1029         epthru->ars = 1;
1030         epthru->reqsenselen = 14;
1031         epthru->islogical = 0;
1032
1033         epthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
1034         epthru->target = (adapter->flag & BOARD_40LD) ?
1035                 (channel << 4) | target : target;
1036
1037         epthru->cdblen = cmd->cmd_len;
1038         epthru->logdrv = cmd->device->lun;
1039
1040         memcpy(epthru->cdb, cmd->cmnd, cmd->cmd_len);
1041
1042         /* Not sure about the direction */
1043         scb->dma_direction = DMA_BIDIRECTIONAL;
1044
1045         switch(cmd->cmnd[0]) {
1046         case INQUIRY:
1047         case READ_CAPACITY:
1048                 if(!(adapter->flag & (1L << cmd->device->channel))) {
1049
1050                         dev_notice(&adapter->dev->dev,
1051                                 "scsi%d: scanning scsi channel %d [P%d] "
1052                                 "for physical devices\n",
1053                                         adapter->host->host_no,
1054                                         cmd->device->channel, channel);
1055
1056                         adapter->flag |= (1L << cmd->device->channel);
1057                 }
1058                 fallthrough;
1059         default:
1060                 epthru->numsgelements = mega_build_sglist(adapter, scb,
1061                                 &epthru->dataxferaddr, &epthru->dataxferlen);
1062                 break;
1063         }
1064
1065         return epthru;
1066 }
1067
1068 static void
1069 __mega_runpendq(adapter_t *adapter)
1070 {
1071         scb_t *scb;
1072         struct list_head *pos, *next;
1073
1074         /* Issue any pending commands to the card */
1075         list_for_each_safe(pos, next, &adapter->pending_list) {
1076
1077                 scb = list_entry(pos, scb_t, list);
1078
1079                 if( !(scb->state & SCB_ISSUED) ) {
1080
1081                         if( issue_scb(adapter, scb) != 0 )
1082                                 return;
1083                 }
1084         }
1085
1086         return;
1087 }
1088
1089
1090 /**
1091  * issue_scb()
1092  * @adapter: pointer to our soft state
1093  * @scb: scsi control block
1094  *
1095  * Post a command to the card if the mailbox is available, otherwise return
1096  * busy. We also take the scb from the pending list if the mailbox is
1097  * available.
1098  */
1099 static int
1100 issue_scb(adapter_t *adapter, scb_t *scb)
1101 {
1102         volatile mbox64_t       *mbox64 = adapter->mbox64;
1103         volatile mbox_t         *mbox = adapter->mbox;
1104         unsigned int    i = 0;
1105
1106         if(unlikely(mbox->m_in.busy)) {
1107                 do {
1108                         udelay(1);
1109                         i++;
1110                 } while( mbox->m_in.busy && (i < max_mbox_busy_wait) );
1111
1112                 if(mbox->m_in.busy) return -1;
1113         }
1114
1115         /* Copy mailbox data into host structure */
1116         memcpy((char *)&mbox->m_out, (char *)scb->raw_mbox,
1117                         sizeof(struct mbox_out));
1118
1119         mbox->m_out.cmdid = scb->idx;   /* Set cmdid */
1120         mbox->m_in.busy = 1;            /* Set busy */
1121
1122
1123         /*
1124          * Increment the pending queue counter
1125          */
1126         atomic_inc(&adapter->pend_cmds);
1127
1128         switch (mbox->m_out.cmd) {
1129         case MEGA_MBOXCMD_LREAD64:
1130         case MEGA_MBOXCMD_LWRITE64:
1131         case MEGA_MBOXCMD_PASSTHRU64:
1132         case MEGA_MBOXCMD_EXTPTHRU:
1133                 mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1134                 mbox64->xfer_segment_hi = 0;
1135                 mbox->m_out.xferaddr = 0xFFFFFFFF;
1136                 break;
1137         default:
1138                 mbox64->xfer_segment_lo = 0;
1139                 mbox64->xfer_segment_hi = 0;
1140         }
1141
1142         /*
1143          * post the command
1144          */
1145         scb->state |= SCB_ISSUED;
1146
1147         if( likely(adapter->flag & BOARD_MEMMAP) ) {
1148                 mbox->m_in.poll = 0;
1149                 mbox->m_in.ack = 0;
1150                 WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1151         }
1152         else {
1153                 irq_enable(adapter);
1154                 issue_command(adapter);
1155         }
1156
1157         return 0;
1158 }
1159
1160 /*
1161  * Wait until the controller's mailbox is available
1162  */
1163 static inline int
1164 mega_busywait_mbox (adapter_t *adapter)
1165 {
1166         if (adapter->mbox->m_in.busy)
1167                 return __mega_busywait_mbox(adapter);
1168         return 0;
1169 }
1170
1171 /**
1172  * issue_scb_block()
1173  * @adapter: pointer to our soft state
1174  * @raw_mbox: the mailbox
1175  *
1176  * Issue a scb in synchronous and non-interrupt mode
1177  */
1178 static int
1179 issue_scb_block(adapter_t *adapter, u_char *raw_mbox)
1180 {
1181         volatile mbox64_t *mbox64 = adapter->mbox64;
1182         volatile mbox_t *mbox = adapter->mbox;
1183         u8      byte;
1184
1185         /* Wait until mailbox is free */
1186         if(mega_busywait_mbox (adapter))
1187                 goto bug_blocked_mailbox;
1188
1189         /* Copy mailbox data into host structure */
1190         memcpy((char *) mbox, raw_mbox, sizeof(struct mbox_out));
1191         mbox->m_out.cmdid = 0xFE;
1192         mbox->m_in.busy = 1;
1193
1194         switch (raw_mbox[0]) {
1195         case MEGA_MBOXCMD_LREAD64:
1196         case MEGA_MBOXCMD_LWRITE64:
1197         case MEGA_MBOXCMD_PASSTHRU64:
1198         case MEGA_MBOXCMD_EXTPTHRU:
1199                 mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1200                 mbox64->xfer_segment_hi = 0;
1201                 mbox->m_out.xferaddr = 0xFFFFFFFF;
1202                 break;
1203         default:
1204                 mbox64->xfer_segment_lo = 0;
1205                 mbox64->xfer_segment_hi = 0;
1206         }
1207
1208         if( likely(adapter->flag & BOARD_MEMMAP) ) {
1209                 mbox->m_in.poll = 0;
1210                 mbox->m_in.ack = 0;
1211                 mbox->m_in.numstatus = 0xFF;
1212                 mbox->m_in.status = 0xFF;
1213                 WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1214
1215                 while((volatile u8)mbox->m_in.numstatus == 0xFF)
1216                         cpu_relax();
1217
1218                 mbox->m_in.numstatus = 0xFF;
1219
1220                 while( (volatile u8)mbox->m_in.poll != 0x77 )
1221                         cpu_relax();
1222
1223                 mbox->m_in.poll = 0;
1224                 mbox->m_in.ack = 0x77;
1225
1226                 WRINDOOR(adapter, adapter->mbox_dma | 0x2);
1227
1228                 while(RDINDOOR(adapter) & 0x2)
1229                         cpu_relax();
1230         }
1231         else {
1232                 irq_disable(adapter);
1233                 issue_command(adapter);
1234
1235                 while (!((byte = irq_state(adapter)) & INTR_VALID))
1236                         cpu_relax();
1237
1238                 set_irq_state(adapter, byte);
1239                 irq_enable(adapter);
1240                 irq_ack(adapter);
1241         }
1242
1243         return mbox->m_in.status;
1244
1245 bug_blocked_mailbox:
1246         dev_warn(&adapter->dev->dev, "Blocked mailbox......!!\n");
1247         udelay (1000);
1248         return -1;
1249 }
1250
1251
1252 /**
1253  * megaraid_isr_iomapped()
1254  * @irq: irq
1255  * @devp: pointer to our soft state
1256  *
1257  * Interrupt service routine for io-mapped controllers.
1258  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1259  * and service the completed commands.
1260  */
1261 static irqreturn_t
1262 megaraid_isr_iomapped(int irq, void *devp)
1263 {
1264         adapter_t       *adapter = devp;
1265         unsigned long   flags;
1266         u8      status;
1267         u8      nstatus;
1268         u8      completed[MAX_FIRMWARE_STATUS];
1269         u8      byte;
1270         int     handled = 0;
1271
1272
1273         /*
1274          * loop till F/W has more commands for us to complete.
1275          */
1276         spin_lock_irqsave(&adapter->lock, flags);
1277
1278         do {
1279                 /* Check if a valid interrupt is pending */
1280                 byte = irq_state(adapter);
1281                 if( (byte & VALID_INTR_BYTE) == 0 ) {
1282                         /*
1283                          * No more pending commands
1284                          */
1285                         goto out_unlock;
1286                 }
1287                 set_irq_state(adapter, byte);
1288
1289                 while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1290                                 == 0xFF)
1291                         cpu_relax();
1292                 adapter->mbox->m_in.numstatus = 0xFF;
1293
1294                 status = adapter->mbox->m_in.status;
1295
1296                 /*
1297                  * decrement the pending queue counter
1298                  */
1299                 atomic_sub(nstatus, &adapter->pend_cmds);
1300
1301                 memcpy(completed, (void *)adapter->mbox->m_in.completed,
1302                                 nstatus);
1303
1304                 /* Acknowledge interrupt */
1305                 irq_ack(adapter);
1306
1307                 mega_cmd_done(adapter, completed, nstatus, status);
1308
1309                 mega_rundoneq(adapter);
1310
1311                 handled = 1;
1312
1313                 /* Loop through any pending requests */
1314                 if(atomic_read(&adapter->quiescent) == 0) {
1315                         mega_runpendq(adapter);
1316                 }
1317
1318         } while(1);
1319
1320  out_unlock:
1321
1322         spin_unlock_irqrestore(&adapter->lock, flags);
1323
1324         return IRQ_RETVAL(handled);
1325 }
1326
1327
1328 /**
1329  * megaraid_isr_memmapped()
1330  * @irq: irq
1331  * @devp: pointer to our soft state
1332  *
1333  * Interrupt service routine for memory-mapped controllers.
1334  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1335  * and service the completed commands.
1336  */
1337 static irqreturn_t
1338 megaraid_isr_memmapped(int irq, void *devp)
1339 {
1340         adapter_t       *adapter = devp;
1341         unsigned long   flags;
1342         u8      status;
1343         u32     dword = 0;
1344         u8      nstatus;
1345         u8      completed[MAX_FIRMWARE_STATUS];
1346         int     handled = 0;
1347
1348
1349         /*
1350          * loop till F/W has more commands for us to complete.
1351          */
1352         spin_lock_irqsave(&adapter->lock, flags);
1353
1354         do {
1355                 /* Check if a valid interrupt is pending */
1356                 dword = RDOUTDOOR(adapter);
1357                 if(dword != 0x10001234) {
1358                         /*
1359                          * No more pending commands
1360                          */
1361                         goto out_unlock;
1362                 }
1363                 WROUTDOOR(adapter, 0x10001234);
1364
1365                 while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1366                                 == 0xFF) {
1367                         cpu_relax();
1368                 }
1369                 adapter->mbox->m_in.numstatus = 0xFF;
1370
1371                 status = adapter->mbox->m_in.status;
1372
1373                 /*
1374                  * decrement the pending queue counter
1375                  */
1376                 atomic_sub(nstatus, &adapter->pend_cmds);
1377
1378                 memcpy(completed, (void *)adapter->mbox->m_in.completed,
1379                                 nstatus);
1380
1381                 /* Acknowledge interrupt */
1382                 WRINDOOR(adapter, 0x2);
1383
1384                 handled = 1;
1385
1386                 while( RDINDOOR(adapter) & 0x02 )
1387                         cpu_relax();
1388
1389                 mega_cmd_done(adapter, completed, nstatus, status);
1390
1391                 mega_rundoneq(adapter);
1392
1393                 /* Loop through any pending requests */
1394                 if(atomic_read(&adapter->quiescent) == 0) {
1395                         mega_runpendq(adapter);
1396                 }
1397
1398         } while(1);
1399
1400  out_unlock:
1401
1402         spin_unlock_irqrestore(&adapter->lock, flags);
1403
1404         return IRQ_RETVAL(handled);
1405 }
1406 /**
1407  * mega_cmd_done()
1408  * @adapter: pointer to our soft state
1409  * @completed: array of ids of completed commands
1410  * @nstatus: number of completed commands
1411  * @status: status of the last command completed
1412  *
1413  * Complete the commands and call the scsi mid-layer callback hooks.
1414  */
1415 static void
1416 mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status)
1417 {
1418         mega_ext_passthru       *epthru = NULL;
1419         struct scatterlist      *sgl;
1420         struct scsi_cmnd        *cmd = NULL;
1421         mega_passthru   *pthru = NULL;
1422         mbox_t  *mbox = NULL;
1423         u8      c;
1424         scb_t   *scb;
1425         int     islogical;
1426         int     cmdid;
1427         int     i;
1428
1429         /*
1430          * for all the commands completed, call the mid-layer callback routine
1431          * and free the scb.
1432          */
1433         for( i = 0; i < nstatus; i++ ) {
1434
1435                 cmdid = completed[i];
1436
1437                 /*
1438                  * Only free SCBs for the commands coming down from the
1439                  * mid-layer, not for which were issued internally
1440                  *
1441                  * For internal command, restore the status returned by the
1442                  * firmware so that user can interpret it.
1443                  */
1444                 if (cmdid == CMDID_INT_CMDS) {
1445                         scb = &adapter->int_scb;
1446
1447                         list_del_init(&scb->list);
1448                         scb->state = SCB_FREE;
1449
1450                         adapter->int_status = status;
1451                         complete(&adapter->int_waitq);
1452                 } else {
1453                         scb = &adapter->scb_list[cmdid];
1454
1455                         /*
1456                          * Make sure f/w has completed a valid command
1457                          */
1458                         if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
1459                                 dev_crit(&adapter->dev->dev, "invalid command "
1460                                         "Id %d, scb->state:%x, scsi cmd:%p\n",
1461                                         cmdid, scb->state, scb->cmd);
1462
1463                                 continue;
1464                         }
1465
1466                         /*
1467                          * Was a abort issued for this command
1468                          */
1469                         if( scb->state & SCB_ABORT ) {
1470
1471                                 dev_warn(&adapter->dev->dev,
1472                                         "aborted cmd [%x] complete\n",
1473                                         scb->idx);
1474
1475                                 scb->cmd->result = (DID_ABORT << 16);
1476
1477                                 list_add_tail(SCSI_LIST(scb->cmd),
1478                                                 &adapter->completed_list);
1479
1480                                 mega_free_scb(adapter, scb);
1481
1482                                 continue;
1483                         }
1484
1485                         /*
1486                          * Was a reset issued for this command
1487                          */
1488                         if( scb->state & SCB_RESET ) {
1489
1490                                 dev_warn(&adapter->dev->dev,
1491                                         "reset cmd [%x] complete\n",
1492                                         scb->idx);
1493
1494                                 scb->cmd->result = (DID_RESET << 16);
1495
1496                                 list_add_tail(SCSI_LIST(scb->cmd),
1497                                                 &adapter->completed_list);
1498
1499                                 mega_free_scb (adapter, scb);
1500
1501                                 continue;
1502                         }
1503
1504                         cmd = scb->cmd;
1505                         pthru = scb->pthru;
1506                         epthru = scb->epthru;
1507                         mbox = (mbox_t *)scb->raw_mbox;
1508
1509 #if MEGA_HAVE_STATS
1510                         {
1511
1512                         int     logdrv = mbox->m_out.logdrv;
1513
1514                         islogical = adapter->logdrv_chan[cmd->channel];
1515                         /*
1516                          * Maintain an error counter for the logical drive.
1517                          * Some application like SNMP agent need such
1518                          * statistics
1519                          */
1520                         if( status && islogical && (cmd->cmnd[0] == READ_6 ||
1521                                                 cmd->cmnd[0] == READ_10 ||
1522                                                 cmd->cmnd[0] == READ_12)) {
1523                                 /*
1524                                  * Logical drive number increases by 0x80 when
1525                                  * a logical drive is deleted
1526                                  */
1527                                 adapter->rd_errors[logdrv%0x80]++;
1528                         }
1529
1530                         if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
1531                                                 cmd->cmnd[0] == WRITE_10 ||
1532                                                 cmd->cmnd[0] == WRITE_12)) {
1533                                 /*
1534                                  * Logical drive number increases by 0x80 when
1535                                  * a logical drive is deleted
1536                                  */
1537                                 adapter->wr_errors[logdrv%0x80]++;
1538                         }
1539
1540                         }
1541 #endif
1542                 }
1543
1544                 /*
1545                  * Do not return the presence of hard disk on the channel so,
1546                  * inquiry sent, and returned data==hard disk or removable
1547                  * hard disk and not logical, request should return failure! -
1548                  * PJ
1549                  */
1550                 islogical = adapter->logdrv_chan[cmd->device->channel];
1551                 if( cmd->cmnd[0] == INQUIRY && !islogical ) {
1552
1553                         sgl = scsi_sglist(cmd);
1554                         if( sg_page(sgl) ) {
1555                                 c = *(unsigned char *) sg_virt(&sgl[0]);
1556                         } else {
1557                                 dev_warn(&adapter->dev->dev, "invalid sg\n");
1558                                 c = 0;
1559                         }
1560
1561                         if(IS_RAID_CH(adapter, cmd->device->channel) &&
1562                                         ((c & 0x1F ) == TYPE_DISK)) {
1563                                 status = 0xF0;
1564                         }
1565                 }
1566
1567                 /* clear result; otherwise, success returns corrupt value */
1568                 cmd->result = 0;
1569
1570                 /* Convert MegaRAID status to Linux error code */
1571                 switch (status) {
1572                 case 0x00:      /* SUCCESS , i.e. SCSI_STATUS_GOOD */
1573                         cmd->result |= (DID_OK << 16);
1574                         break;
1575
1576                 case 0x02:      /* ERROR_ABORTED, i.e.
1577                                    SCSI_STATUS_CHECK_CONDITION */
1578
1579                         /* set sense_buffer and result fields */
1580                         if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
1581                                 mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
1582
1583                                 memcpy(cmd->sense_buffer, pthru->reqsensearea,
1584                                                 14);
1585
1586                                 cmd->result = (DRIVER_SENSE << 24) |
1587                                         (DID_OK << 16) |
1588                                         (CHECK_CONDITION << 1);
1589                         }
1590                         else {
1591                                 if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
1592
1593                                         memcpy(cmd->sense_buffer,
1594                                                 epthru->reqsensearea, 14);
1595
1596                                         cmd->result = (DRIVER_SENSE << 24) |
1597                                                 (DID_OK << 16) |
1598                                                 (CHECK_CONDITION << 1);
1599                                 } else {
1600                                         cmd->sense_buffer[0] = 0x70;
1601                                         cmd->sense_buffer[2] = ABORTED_COMMAND;
1602                                         cmd->result |= (CHECK_CONDITION << 1);
1603                                 }
1604                         }
1605                         break;
1606
1607                 case 0x08:      /* ERR_DEST_DRIVE_FAILED, i.e.
1608                                    SCSI_STATUS_BUSY */
1609                         cmd->result |= (DID_BUS_BUSY << 16) | status;
1610                         break;
1611
1612                 default:
1613 #if MEGA_HAVE_CLUSTERING
1614                         /*
1615                          * If TEST_UNIT_READY fails, we know
1616                          * MEGA_RESERVATION_STATUS failed
1617                          */
1618                         if( cmd->cmnd[0] == TEST_UNIT_READY ) {
1619                                 cmd->result |= (DID_ERROR << 16) |
1620                                         (RESERVATION_CONFLICT << 1);
1621                         }
1622                         else
1623                         /*
1624                          * Error code returned is 1 if Reserve or Release
1625                          * failed or the input parameter is invalid
1626                          */
1627                         if( status == 1 &&
1628                                 (cmd->cmnd[0] == RESERVE ||
1629                                          cmd->cmnd[0] == RELEASE) ) {
1630
1631                                 cmd->result |= (DID_ERROR << 16) |
1632                                         (RESERVATION_CONFLICT << 1);
1633                         }
1634                         else
1635 #endif
1636                                 cmd->result |= (DID_BAD_TARGET << 16)|status;
1637                 }
1638
1639                 mega_free_scb(adapter, scb);
1640
1641                 /* Add Scsi_Command to end of completed queue */
1642                 list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
1643         }
1644 }
1645
1646
1647 /*
1648  * mega_runpendq()
1649  *
1650  * Run through the list of completed requests and finish it
1651  */
1652 static void
1653 mega_rundoneq (adapter_t *adapter)
1654 {
1655         struct scsi_cmnd *cmd;
1656         struct list_head *pos;
1657
1658         list_for_each(pos, &adapter->completed_list) {
1659
1660                 struct scsi_pointer* spos = (struct scsi_pointer *)pos;
1661
1662                 cmd = list_entry(spos, struct scsi_cmnd, SCp);
1663                 cmd->scsi_done(cmd);
1664         }
1665
1666         INIT_LIST_HEAD(&adapter->completed_list);
1667 }
1668
1669
1670 /*
1671  * Free a SCB structure
1672  * Note: We assume the scsi commands associated with this scb is not free yet.
1673  */
1674 static void
1675 mega_free_scb(adapter_t *adapter, scb_t *scb)
1676 {
1677         switch( scb->dma_type ) {
1678
1679         case MEGA_DMA_TYPE_NONE:
1680                 break;
1681
1682         case MEGA_SGLIST:
1683                 scsi_dma_unmap(scb->cmd);
1684                 break;
1685         default:
1686                 break;
1687         }
1688
1689         /*
1690          * Remove from the pending list
1691          */
1692         list_del_init(&scb->list);
1693
1694         /* Link the scb back into free list */
1695         scb->state = SCB_FREE;
1696         scb->cmd = NULL;
1697
1698         list_add(&scb->list, &adapter->free_list);
1699 }
1700
1701
1702 static int
1703 __mega_busywait_mbox (adapter_t *adapter)
1704 {
1705         volatile mbox_t *mbox = adapter->mbox;
1706         long counter;
1707
1708         for (counter = 0; counter < 10000; counter++) {
1709                 if (!mbox->m_in.busy)
1710                         return 0;
1711                 udelay(100);
1712                 cond_resched();
1713         }
1714         return -1;              /* give up after 1 second */
1715 }
1716
1717 /*
1718  * Copies data to SGLIST
1719  * Note: For 64 bit cards, we need a minimum of one SG element for read/write
1720  */
1721 static int
1722 mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
1723 {
1724         struct scatterlist *sg;
1725         struct scsi_cmnd        *cmd;
1726         int     sgcnt;
1727         int     idx;
1728
1729         cmd = scb->cmd;
1730
1731         /*
1732          * Copy Scatter-Gather list info into controller structure.
1733          *
1734          * The number of sg elements returned must not exceed our limit
1735          */
1736         sgcnt = scsi_dma_map(cmd);
1737
1738         scb->dma_type = MEGA_SGLIST;
1739
1740         BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);
1741
1742         *len = 0;
1743
1744         if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
1745                 sg = scsi_sglist(cmd);
1746                 scb->dma_h_bulkdata = sg_dma_address(sg);
1747                 *buf = (u32)scb->dma_h_bulkdata;
1748                 *len = sg_dma_len(sg);
1749                 return 0;
1750         }
1751
1752         scsi_for_each_sg(cmd, sg, sgcnt, idx) {
1753                 if (adapter->has_64bit_addr) {
1754                         scb->sgl64[idx].address = sg_dma_address(sg);
1755                         *len += scb->sgl64[idx].length = sg_dma_len(sg);
1756                 } else {
1757                         scb->sgl[idx].address = sg_dma_address(sg);
1758                         *len += scb->sgl[idx].length = sg_dma_len(sg);
1759                 }
1760         }
1761
1762         /* Reset pointer and length fields */
1763         *buf = scb->sgl_dma_addr;
1764
1765         /* Return count of SG requests */
1766         return sgcnt;
1767 }
1768
1769
1770 /*
1771  * mega_8_to_40ld()
1772  *
1773  * takes all info in AdapterInquiry structure and puts it into ProductInfo and
1774  * Enquiry3 structures for later use
1775  */
1776 static void
1777 mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
1778                 mega_product_info *product_info)
1779 {
1780         int i;
1781
1782         product_info->max_commands = inquiry->adapter_info.max_commands;
1783         enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
1784         product_info->nchannels = inquiry->adapter_info.nchannels;
1785
1786         for (i = 0; i < 4; i++) {
1787                 product_info->fw_version[i] =
1788                         inquiry->adapter_info.fw_version[i];
1789
1790                 product_info->bios_version[i] =
1791                         inquiry->adapter_info.bios_version[i];
1792         }
1793         enquiry3->cache_flush_interval =
1794                 inquiry->adapter_info.cache_flush_interval;
1795
1796         product_info->dram_size = inquiry->adapter_info.dram_size;
1797
1798         enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
1799
1800         for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
1801                 enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
1802                 enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
1803                 enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
1804         }
1805
1806         for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
1807                 enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
1808 }
1809
1810 static inline void
1811 mega_free_sgl(adapter_t *adapter)
1812 {
1813         scb_t   *scb;
1814         int     i;
1815
1816         for(i = 0; i < adapter->max_cmds; i++) {
1817
1818                 scb = &adapter->scb_list[i];
1819
1820                 if( scb->sgl64 ) {
1821                         dma_free_coherent(&adapter->dev->dev,
1822                                           sizeof(mega_sgl64) * adapter->sglen,
1823                                           scb->sgl64, scb->sgl_dma_addr);
1824
1825                         scb->sgl64 = NULL;
1826                 }
1827
1828                 if( scb->pthru ) {
1829                         dma_free_coherent(&adapter->dev->dev,
1830                                           sizeof(mega_passthru), scb->pthru,
1831                                           scb->pthru_dma_addr);
1832
1833                         scb->pthru = NULL;
1834                 }
1835
1836                 if( scb->epthru ) {
1837                         dma_free_coherent(&adapter->dev->dev,
1838                                           sizeof(mega_ext_passthru),
1839                                           scb->epthru, scb->epthru_dma_addr);
1840
1841                         scb->epthru = NULL;
1842                 }
1843
1844         }
1845 }
1846
1847
1848 /*
1849  * Get information about the card/driver
1850  */
1851 const char *
1852 megaraid_info(struct Scsi_Host *host)
1853 {
1854         static char buffer[512];
1855         adapter_t *adapter;
1856
1857         adapter = (adapter_t *)host->hostdata;
1858
1859         sprintf (buffer,
1860                  "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
1861                  adapter->fw_version, adapter->product_info.max_commands,
1862                  adapter->host->max_id, adapter->host->max_channel,
1863                  (u32)adapter->host->max_lun);
1864         return buffer;
1865 }
1866
1867 /*
1868  * Abort a previous SCSI request. Only commands on the pending list can be
1869  * aborted. All the commands issued to the F/W must complete.
1870  */
1871 static int
1872 megaraid_abort(struct scsi_cmnd *cmd)
1873 {
1874         adapter_t       *adapter;
1875         int             rval;
1876
1877         adapter = (adapter_t *)cmd->device->host->hostdata;
1878
1879         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
1880
1881         /*
1882          * This is required here to complete any completed requests
1883          * to be communicated over to the mid layer.
1884          */
1885         mega_rundoneq(adapter);
1886
1887         return rval;
1888 }
1889
1890
1891 static int
1892 megaraid_reset(struct scsi_cmnd *cmd)
1893 {
1894         adapter_t       *adapter;
1895         megacmd_t       mc;
1896         int             rval;
1897
1898         adapter = (adapter_t *)cmd->device->host->hostdata;
1899
1900 #if MEGA_HAVE_CLUSTERING
1901         mc.cmd = MEGA_CLUSTER_CMD;
1902         mc.opcode = MEGA_RESET_RESERVATIONS;
1903
1904         if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
1905                 dev_warn(&adapter->dev->dev, "reservation reset failed\n");
1906         }
1907         else {
1908                 dev_info(&adapter->dev->dev, "reservation reset\n");
1909         }
1910 #endif
1911
1912         spin_lock_irq(&adapter->lock);
1913
1914         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
1915
1916         /*
1917          * This is required here to complete any completed requests
1918          * to be communicated over to the mid layer.
1919          */
1920         mega_rundoneq(adapter);
1921         spin_unlock_irq(&adapter->lock);
1922
1923         return rval;
1924 }
1925
1926 /**
1927  * megaraid_abort_and_reset()
1928  * @adapter: megaraid soft state
1929  * @cmd: scsi command to be aborted or reset
1930  * @aor: abort or reset flag
1931  *
1932  * Try to locate the scsi command in the pending queue. If found and is not
1933  * issued to the controller, abort/reset it. Otherwise return failure
1934  */
1935 static int
1936 megaraid_abort_and_reset(adapter_t *adapter, struct scsi_cmnd *cmd, int aor)
1937 {
1938         struct list_head        *pos, *next;
1939         scb_t                   *scb;
1940
1941         dev_warn(&adapter->dev->dev, "%s cmd=%x <c=%d t=%d l=%d>\n",
1942              (aor == SCB_ABORT)? "ABORTING":"RESET",
1943              cmd->cmnd[0], cmd->device->channel,
1944              cmd->device->id, (u32)cmd->device->lun);
1945
1946         if(list_empty(&adapter->pending_list))
1947                 return FAILED;
1948
1949         list_for_each_safe(pos, next, &adapter->pending_list) {
1950
1951                 scb = list_entry(pos, scb_t, list);
1952
1953                 if (scb->cmd == cmd) { /* Found command */
1954
1955                         scb->state |= aor;
1956
1957                         /*
1958                          * Check if this command has firmware ownership. If
1959                          * yes, we cannot reset this command. Whenever f/w
1960                          * completes this command, we will return appropriate
1961                          * status from ISR.
1962                          */
1963                         if( scb->state & SCB_ISSUED ) {
1964
1965                                 dev_warn(&adapter->dev->dev,
1966                                         "%s[%x], fw owner\n",
1967                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1968                                         scb->idx);
1969
1970                                 return FAILED;
1971                         }
1972                         else {
1973
1974                                 /*
1975                                  * Not yet issued! Remove from the pending
1976                                  * list
1977                                  */
1978                                 dev_warn(&adapter->dev->dev,
1979                                         "%s-[%x], driver owner\n",
1980                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1981                                         scb->idx);
1982
1983                                 mega_free_scb(adapter, scb);
1984
1985                                 if( aor == SCB_ABORT ) {
1986                                         cmd->result = (DID_ABORT << 16);
1987                                 }
1988                                 else {
1989                                         cmd->result = (DID_RESET << 16);
1990                                 }
1991
1992                                 list_add_tail(SCSI_LIST(cmd),
1993                                                 &adapter->completed_list);
1994
1995                                 return SUCCESS;
1996                         }
1997                 }
1998         }
1999
2000         return FAILED;
2001 }
2002
2003 static inline int
2004 make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
2005 {
2006         *pdev = pci_alloc_dev(NULL);
2007
2008         if( *pdev == NULL ) return -1;
2009
2010         memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
2011
2012         if (dma_set_mask(&(*pdev)->dev, DMA_BIT_MASK(32)) != 0) {
2013                 kfree(*pdev);
2014                 return -1;
2015         }
2016
2017         return 0;
2018 }
2019
2020 static inline void
2021 free_local_pdev(struct pci_dev *pdev)
2022 {
2023         kfree(pdev);
2024 }
2025
2026 /**
2027  * mega_allocate_inquiry()
2028  * @dma_handle: handle returned for dma address
2029  * @pdev: handle to pci device
2030  *
2031  * allocates memory for inquiry structure
2032  */
2033 static inline void *
2034 mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
2035 {
2036         return dma_alloc_coherent(&pdev->dev, sizeof(mega_inquiry3),
2037                                   dma_handle, GFP_KERNEL);
2038 }
2039
2040
2041 static inline void
2042 mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
2043 {
2044         dma_free_coherent(&pdev->dev, sizeof(mega_inquiry3), inquiry,
2045                           dma_handle);
2046 }
2047
2048
2049 #ifdef CONFIG_PROC_FS
2050 /* Following code handles /proc fs  */
2051
2052 /**
2053  * proc_show_config()
2054  * @m: Synthetic file construction data
2055  * @v: File iterator
2056  *
2057  * Display configuration information about the controller.
2058  */
2059 static int
2060 proc_show_config(struct seq_file *m, void *v)
2061 {
2062
2063         adapter_t *adapter = m->private;
2064
2065         seq_puts(m, MEGARAID_VERSION);
2066         if(adapter->product_info.product_name[0])
2067                 seq_printf(m, "%s\n", adapter->product_info.product_name);
2068
2069         seq_puts(m, "Controller Type: ");
2070
2071         if( adapter->flag & BOARD_MEMMAP )
2072                 seq_puts(m, "438/466/467/471/493/518/520/531/532\n");
2073         else
2074                 seq_puts(m, "418/428/434\n");
2075
2076         if(adapter->flag & BOARD_40LD)
2077                 seq_puts(m, "Controller Supports 40 Logical Drives\n");
2078
2079         if(adapter->flag & BOARD_64BIT)
2080                 seq_puts(m, "Controller capable of 64-bit memory addressing\n");
2081         if( adapter->has_64bit_addr )
2082                 seq_puts(m, "Controller using 64-bit memory addressing\n");
2083         else
2084                 seq_puts(m, "Controller is not using 64-bit memory addressing\n");
2085
2086         seq_printf(m, "Base = %08lx, Irq = %d, ",
2087                    adapter->base, adapter->host->irq);
2088
2089         seq_printf(m, "Logical Drives = %d, Channels = %d\n",
2090                    adapter->numldrv, adapter->product_info.nchannels);
2091
2092         seq_printf(m, "Version =%s:%s, DRAM = %dMb\n",
2093                    adapter->fw_version, adapter->bios_version,
2094                    adapter->product_info.dram_size);
2095
2096         seq_printf(m, "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
2097                    adapter->product_info.max_commands, adapter->max_cmds);
2098
2099         seq_printf(m, "support_ext_cdb    = %d\n", adapter->support_ext_cdb);
2100         seq_printf(m, "support_random_del = %d\n", adapter->support_random_del);
2101         seq_printf(m, "boot_ldrv_enabled  = %d\n", adapter->boot_ldrv_enabled);
2102         seq_printf(m, "boot_ldrv          = %d\n", adapter->boot_ldrv);
2103         seq_printf(m, "boot_pdrv_enabled  = %d\n", adapter->boot_pdrv_enabled);
2104         seq_printf(m, "boot_pdrv_ch       = %d\n", adapter->boot_pdrv_ch);
2105         seq_printf(m, "boot_pdrv_tgt      = %d\n", adapter->boot_pdrv_tgt);
2106         seq_printf(m, "quiescent          = %d\n",
2107                    atomic_read(&adapter->quiescent));
2108         seq_printf(m, "has_cluster        = %d\n", adapter->has_cluster);
2109
2110         seq_puts(m, "\nModule Parameters:\n");
2111         seq_printf(m, "max_cmd_per_lun    = %d\n", max_cmd_per_lun);
2112         seq_printf(m, "max_sectors_per_io = %d\n", max_sectors_per_io);
2113         return 0;
2114 }
2115
2116 /**
2117  * proc_show_stat()
2118  * @m: Synthetic file construction data
2119  * @v: File iterator
2120  *
2121  * Display statistical information about the I/O activity.
2122  */
2123 static int
2124 proc_show_stat(struct seq_file *m, void *v)
2125 {
2126         adapter_t *adapter = m->private;
2127 #if MEGA_HAVE_STATS
2128         int     i;
2129 #endif
2130
2131         seq_puts(m, "Statistical Information for this controller\n");
2132         seq_printf(m, "pend_cmds = %d\n", atomic_read(&adapter->pend_cmds));
2133 #if MEGA_HAVE_STATS
2134         for(i = 0; i < adapter->numldrv; i++) {
2135                 seq_printf(m, "Logical Drive %d:\n", i);
2136                 seq_printf(m, "\tReads Issued = %lu, Writes Issued = %lu\n",
2137                            adapter->nreads[i], adapter->nwrites[i]);
2138                 seq_printf(m, "\tSectors Read = %lu, Sectors Written = %lu\n",
2139                            adapter->nreadblocks[i], adapter->nwriteblocks[i]);
2140                 seq_printf(m, "\tRead errors = %lu, Write errors = %lu\n\n",
2141                            adapter->rd_errors[i], adapter->wr_errors[i]);
2142         }
2143 #else
2144         seq_puts(m, "IO and error counters not compiled in driver.\n");
2145 #endif
2146         return 0;
2147 }
2148
2149
2150 /**
2151  * proc_show_mbox()
2152  * @m: Synthetic file construction data
2153  * @v: File iterator
2154  *
2155  * Display mailbox information for the last command issued. This information
2156  * is good for debugging.
2157  */
2158 static int
2159 proc_show_mbox(struct seq_file *m, void *v)
2160 {
2161         adapter_t       *adapter = m->private;
2162         volatile mbox_t *mbox = adapter->mbox;
2163
2164         seq_puts(m, "Contents of Mail Box Structure\n");
2165         seq_printf(m, "  Fw Command   = 0x%02x\n", mbox->m_out.cmd);
2166         seq_printf(m, "  Cmd Sequence = 0x%02x\n", mbox->m_out.cmdid);
2167         seq_printf(m, "  No of Sectors= %04d\n", mbox->m_out.numsectors);
2168         seq_printf(m, "  LBA          = 0x%02x\n", mbox->m_out.lba);
2169         seq_printf(m, "  DTA          = 0x%08x\n", mbox->m_out.xferaddr);
2170         seq_printf(m, "  Logical Drive= 0x%02x\n", mbox->m_out.logdrv);
2171         seq_printf(m, "  No of SG Elmt= 0x%02x\n", mbox->m_out.numsgelements);
2172         seq_printf(m, "  Busy         = %01x\n", mbox->m_in.busy);
2173         seq_printf(m, "  Status       = 0x%02x\n", mbox->m_in.status);
2174         return 0;
2175 }
2176
2177
2178 /**
2179  * proc_show_rebuild_rate()
2180  * @m: Synthetic file construction data
2181  * @v: File iterator
2182  *
2183  * Display current rebuild rate
2184  */
2185 static int
2186 proc_show_rebuild_rate(struct seq_file *m, void *v)
2187 {
2188         adapter_t       *adapter = m->private;
2189         dma_addr_t      dma_handle;
2190         caddr_t         inquiry;
2191         struct pci_dev  *pdev;
2192
2193         if( make_local_pdev(adapter, &pdev) != 0 )
2194                 return 0;
2195
2196         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2197                 goto free_pdev;
2198
2199         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2200                 seq_puts(m, "Adapter inquiry failed.\n");
2201                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2202                 goto free_inquiry;
2203         }
2204
2205         if( adapter->flag & BOARD_40LD )
2206                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2207                            ((mega_inquiry3 *)inquiry)->rebuild_rate);
2208         else
2209                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2210                         ((mraid_ext_inquiry *)
2211                          inquiry)->raid_inq.adapter_info.rebuild_rate);
2212
2213 free_inquiry:
2214         mega_free_inquiry(inquiry, dma_handle, pdev);
2215 free_pdev:
2216         free_local_pdev(pdev);
2217         return 0;
2218 }
2219
2220
2221 /**
2222  * proc_show_battery()
2223  * @m: Synthetic file construction data
2224  * @v: File iterator
2225  *
2226  * Display information about the battery module on the controller.
2227  */
2228 static int
2229 proc_show_battery(struct seq_file *m, void *v)
2230 {
2231         adapter_t       *adapter = m->private;
2232         dma_addr_t      dma_handle;
2233         caddr_t         inquiry;
2234         struct pci_dev  *pdev;
2235         u8      battery_status;
2236
2237         if( make_local_pdev(adapter, &pdev) != 0 )
2238                 return 0;
2239
2240         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2241                 goto free_pdev;
2242
2243         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2244                 seq_puts(m, "Adapter inquiry failed.\n");
2245                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2246                 goto free_inquiry;
2247         }
2248
2249         if( adapter->flag & BOARD_40LD ) {
2250                 battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
2251         }
2252         else {
2253                 battery_status = ((mraid_ext_inquiry *)inquiry)->
2254                         raid_inq.adapter_info.battery_status;
2255         }
2256
2257         /*
2258          * Decode the battery status
2259          */
2260         seq_printf(m, "Battery Status:[%d]", battery_status);
2261
2262         if(battery_status == MEGA_BATT_CHARGE_DONE)
2263                 seq_puts(m, " Charge Done");
2264
2265         if(battery_status & MEGA_BATT_MODULE_MISSING)
2266                 seq_puts(m, " Module Missing");
2267
2268         if(battery_status & MEGA_BATT_LOW_VOLTAGE)
2269                 seq_puts(m, " Low Voltage");
2270
2271         if(battery_status & MEGA_BATT_TEMP_HIGH)
2272                 seq_puts(m, " Temperature High");
2273
2274         if(battery_status & MEGA_BATT_PACK_MISSING)
2275                 seq_puts(m, " Pack Missing");
2276
2277         if(battery_status & MEGA_BATT_CHARGE_INPROG)
2278                 seq_puts(m, " Charge In-progress");
2279
2280         if(battery_status & MEGA_BATT_CHARGE_FAIL)
2281                 seq_puts(m, " Charge Fail");
2282
2283         if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
2284                 seq_puts(m, " Cycles Exceeded");
2285
2286         seq_putc(m, '\n');
2287
2288 free_inquiry:
2289         mega_free_inquiry(inquiry, dma_handle, pdev);
2290 free_pdev:
2291         free_local_pdev(pdev);
2292         return 0;
2293 }
2294
2295
2296 /*
2297  * Display scsi inquiry
2298  */
2299 static void
2300 mega_print_inquiry(struct seq_file *m, char *scsi_inq)
2301 {
2302         int     i;
2303
2304         seq_puts(m, "  Vendor: ");
2305         seq_write(m, scsi_inq + 8, 8);
2306         seq_puts(m, "  Model: ");
2307         seq_write(m, scsi_inq + 16, 16);
2308         seq_puts(m, "  Rev: ");
2309         seq_write(m, scsi_inq + 32, 4);
2310         seq_putc(m, '\n');
2311
2312         i = scsi_inq[0] & 0x1f;
2313         seq_printf(m, "  Type:   %s ", scsi_device_type(i));
2314
2315         seq_printf(m, "                 ANSI SCSI revision: %02x",
2316                    scsi_inq[2] & 0x07);
2317
2318         if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
2319                 seq_puts(m, " CCS\n");
2320         else
2321                 seq_putc(m, '\n');
2322 }
2323
2324 /**
2325  * proc_show_pdrv()
2326  * @m: Synthetic file construction data
2327  * @adapter: pointer to our soft state
2328  * @channel: channel
2329  *
2330  * Display information about the physical drives.
2331  */
2332 static int
2333 proc_show_pdrv(struct seq_file *m, adapter_t *adapter, int channel)
2334 {
2335         dma_addr_t      dma_handle;
2336         char            *scsi_inq;
2337         dma_addr_t      scsi_inq_dma_handle;
2338         caddr_t         inquiry;
2339         struct pci_dev  *pdev;
2340         u8      *pdrv_state;
2341         u8      state;
2342         int     tgt;
2343         int     max_channels;
2344         int     i;
2345
2346         if( make_local_pdev(adapter, &pdev) != 0 )
2347                 return 0;
2348
2349         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2350                 goto free_pdev;
2351
2352         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2353                 seq_puts(m, "Adapter inquiry failed.\n");
2354                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2355                 goto free_inquiry;
2356         }
2357
2358
2359         scsi_inq = dma_alloc_coherent(&pdev->dev, 256, &scsi_inq_dma_handle,
2360                                       GFP_KERNEL);
2361         if( scsi_inq == NULL ) {
2362                 seq_puts(m, "memory not available for scsi inq.\n");
2363                 goto free_inquiry;
2364         }
2365
2366         if( adapter->flag & BOARD_40LD ) {
2367                 pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
2368         }
2369         else {
2370                 pdrv_state = ((mraid_ext_inquiry *)inquiry)->
2371                         raid_inq.pdrv_info.pdrv_state;
2372         }
2373
2374         max_channels = adapter->product_info.nchannels;
2375
2376         if( channel >= max_channels ) {
2377                 goto free_pci;
2378         }
2379
2380         for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
2381
2382                 i = channel*16 + tgt;
2383
2384                 state = *(pdrv_state + i);
2385                 switch( state & 0x0F ) {
2386                 case PDRV_ONLINE:
2387                         seq_printf(m, "Channel:%2d Id:%2d State: Online",
2388                                    channel, tgt);
2389                         break;
2390
2391                 case PDRV_FAILED:
2392                         seq_printf(m, "Channel:%2d Id:%2d State: Failed",
2393                                    channel, tgt);
2394                         break;
2395
2396                 case PDRV_RBLD:
2397                         seq_printf(m, "Channel:%2d Id:%2d State: Rebuild",
2398                                    channel, tgt);
2399                         break;
2400
2401                 case PDRV_HOTSPARE:
2402                         seq_printf(m, "Channel:%2d Id:%2d State: Hot spare",
2403                                    channel, tgt);
2404                         break;
2405
2406                 default:
2407                         seq_printf(m, "Channel:%2d Id:%2d State: Un-configured",
2408                                    channel, tgt);
2409                         break;
2410                 }
2411
2412                 /*
2413                  * This interface displays inquiries for disk drives
2414                  * only. Inquries for logical drives and non-disk
2415                  * devices are available through /proc/scsi/scsi
2416                  */
2417                 memset(scsi_inq, 0, 256);
2418                 if( mega_internal_dev_inquiry(adapter, channel, tgt,
2419                                 scsi_inq_dma_handle) ||
2420                                 (scsi_inq[0] & 0x1F) != TYPE_DISK ) {
2421                         continue;
2422                 }
2423
2424                 /*
2425                  * Check for overflow. We print less than 240
2426                  * characters for inquiry
2427                  */
2428                 seq_puts(m, ".\n");
2429                 mega_print_inquiry(m, scsi_inq);
2430         }
2431
2432 free_pci:
2433         dma_free_coherent(&pdev->dev, 256, scsi_inq, scsi_inq_dma_handle);
2434 free_inquiry:
2435         mega_free_inquiry(inquiry, dma_handle, pdev);
2436 free_pdev:
2437         free_local_pdev(pdev);
2438         return 0;
2439 }
2440
2441 /**
2442  * proc_show_pdrv_ch0()
2443  * @m: Synthetic file construction data
2444  * @v: File iterator
2445  *
2446  * Display information about the physical drives on physical channel 0.
2447  */
2448 static int
2449 proc_show_pdrv_ch0(struct seq_file *m, void *v)
2450 {
2451         return proc_show_pdrv(m, m->private, 0);
2452 }
2453
2454
2455 /**
2456  * proc_show_pdrv_ch1()
2457  * @m: Synthetic file construction data
2458  * @v: File iterator
2459  *
2460  * Display information about the physical drives on physical channel 1.
2461  */
2462 static int
2463 proc_show_pdrv_ch1(struct seq_file *m, void *v)
2464 {
2465         return proc_show_pdrv(m, m->private, 1);
2466 }
2467
2468
2469 /**
2470  * proc_show_pdrv_ch2()
2471  * @m: Synthetic file construction data
2472  * @v: File iterator
2473  *
2474  * Display information about the physical drives on physical channel 2.
2475  */
2476 static int
2477 proc_show_pdrv_ch2(struct seq_file *m, void *v)
2478 {
2479         return proc_show_pdrv(m, m->private, 2);
2480 }
2481
2482
2483 /**
2484  * proc_show_pdrv_ch3()
2485  * @m: Synthetic file construction data
2486  * @v: File iterator
2487  *
2488  * Display information about the physical drives on physical channel 3.
2489  */
2490 static int
2491 proc_show_pdrv_ch3(struct seq_file *m, void *v)
2492 {
2493         return proc_show_pdrv(m, m->private, 3);
2494 }
2495
2496
2497 /**
2498  * proc_show_rdrv()
2499  * @m: Synthetic file construction data
2500  * @adapter: pointer to our soft state
2501  * @start: starting logical drive to display
2502  * @end: ending logical drive to display
2503  *
2504  * We do not print the inquiry information since its already available through
2505  * /proc/scsi/scsi interface
2506  */
2507 static int
2508 proc_show_rdrv(struct seq_file *m, adapter_t *adapter, int start, int end )
2509 {
2510         dma_addr_t      dma_handle;
2511         logdrv_param    *lparam;
2512         megacmd_t       mc;
2513         char            *disk_array;
2514         dma_addr_t      disk_array_dma_handle;
2515         caddr_t         inquiry;
2516         struct pci_dev  *pdev;
2517         u8      *rdrv_state;
2518         int     num_ldrv;
2519         u32     array_sz;
2520         int     i;
2521
2522         if( make_local_pdev(adapter, &pdev) != 0 )
2523                 return 0;
2524
2525         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2526                 goto free_pdev;
2527
2528         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2529                 seq_puts(m, "Adapter inquiry failed.\n");
2530                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2531                 goto free_inquiry;
2532         }
2533
2534         memset(&mc, 0, sizeof(megacmd_t));
2535
2536         if( adapter->flag & BOARD_40LD ) {
2537                 array_sz = sizeof(disk_array_40ld);
2538
2539                 rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
2540
2541                 num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
2542         }
2543         else {
2544                 array_sz = sizeof(disk_array_8ld);
2545
2546                 rdrv_state = ((mraid_ext_inquiry *)inquiry)->
2547                         raid_inq.logdrv_info.ldrv_state;
2548
2549                 num_ldrv = ((mraid_ext_inquiry *)inquiry)->
2550                         raid_inq.logdrv_info.num_ldrv;
2551         }
2552
2553         disk_array = dma_alloc_coherent(&pdev->dev, array_sz,
2554                                         &disk_array_dma_handle, GFP_KERNEL);
2555
2556         if( disk_array == NULL ) {
2557                 seq_puts(m, "memory not available.\n");
2558                 goto free_inquiry;
2559         }
2560
2561         mc.xferaddr = (u32)disk_array_dma_handle;
2562
2563         if( adapter->flag & BOARD_40LD ) {
2564                 mc.cmd = FC_NEW_CONFIG;
2565                 mc.opcode = OP_DCMD_READ_CONFIG;
2566
2567                 if( mega_internal_command(adapter, &mc, NULL) ) {
2568                         seq_puts(m, "40LD read config failed.\n");
2569                         goto free_pci;
2570                 }
2571
2572         }
2573         else {
2574                 mc.cmd = NEW_READ_CONFIG_8LD;
2575
2576                 if( mega_internal_command(adapter, &mc, NULL) ) {
2577                         mc.cmd = READ_CONFIG_8LD;
2578                         if( mega_internal_command(adapter, &mc, NULL) ) {
2579                                 seq_puts(m, "8LD read config failed.\n");
2580                                 goto free_pci;
2581                         }
2582                 }
2583         }
2584
2585         for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
2586
2587                 if( adapter->flag & BOARD_40LD ) {
2588                         lparam =
2589                         &((disk_array_40ld *)disk_array)->ldrv[i].lparam;
2590                 }
2591                 else {
2592                         lparam =
2593                         &((disk_array_8ld *)disk_array)->ldrv[i].lparam;
2594                 }
2595
2596                 /*
2597                  * Check for overflow. We print less than 240 characters for
2598                  * information about each logical drive.
2599                  */
2600                 seq_printf(m, "Logical drive:%2d:, ", i);
2601
2602                 switch( rdrv_state[i] & 0x0F ) {
2603                 case RDRV_OFFLINE:
2604                         seq_puts(m, "state: offline");
2605                         break;
2606                 case RDRV_DEGRADED:
2607                         seq_puts(m, "state: degraded");
2608                         break;
2609                 case RDRV_OPTIMAL:
2610                         seq_puts(m, "state: optimal");
2611                         break;
2612                 case RDRV_DELETED:
2613                         seq_puts(m, "state: deleted");
2614                         break;
2615                 default:
2616                         seq_puts(m, "state: unknown");
2617                         break;
2618                 }
2619
2620                 /*
2621                  * Check if check consistency or initialization is going on
2622                  * for this logical drive.
2623                  */
2624                 if( (rdrv_state[i] & 0xF0) == 0x20 )
2625                         seq_puts(m, ", check-consistency in progress");
2626                 else if( (rdrv_state[i] & 0xF0) == 0x10 )
2627                         seq_puts(m, ", initialization in progress");
2628
2629                 seq_putc(m, '\n');
2630
2631                 seq_printf(m, "Span depth:%3d, ", lparam->span_depth);
2632                 seq_printf(m, "RAID level:%3d, ", lparam->level);
2633                 seq_printf(m, "Stripe size:%3d, ",
2634                            lparam->stripe_sz ? lparam->stripe_sz/2: 128);
2635                 seq_printf(m, "Row size:%3d\n", lparam->row_size);
2636
2637                 seq_puts(m, "Read Policy: ");
2638                 switch(lparam->read_ahead) {
2639                 case NO_READ_AHEAD:
2640                         seq_puts(m, "No read ahead, ");
2641                         break;
2642                 case READ_AHEAD:
2643                         seq_puts(m, "Read ahead, ");
2644                         break;
2645                 case ADAP_READ_AHEAD:
2646                         seq_puts(m, "Adaptive, ");
2647                         break;
2648
2649                 }
2650
2651                 seq_puts(m, "Write Policy: ");
2652                 switch(lparam->write_mode) {
2653                 case WRMODE_WRITE_THRU:
2654                         seq_puts(m, "Write thru, ");
2655                         break;
2656                 case WRMODE_WRITE_BACK:
2657                         seq_puts(m, "Write back, ");
2658                         break;
2659                 }
2660
2661                 seq_puts(m, "Cache Policy: ");
2662                 switch(lparam->direct_io) {
2663                 case CACHED_IO:
2664                         seq_puts(m, "Cached IO\n\n");
2665                         break;
2666                 case DIRECT_IO:
2667                         seq_puts(m, "Direct IO\n\n");
2668                         break;
2669                 }
2670         }
2671
2672 free_pci:
2673         dma_free_coherent(&pdev->dev, array_sz, disk_array,
2674                           disk_array_dma_handle);
2675 free_inquiry:
2676         mega_free_inquiry(inquiry, dma_handle, pdev);
2677 free_pdev:
2678         free_local_pdev(pdev);
2679         return 0;
2680 }
2681
2682 /**
2683  * proc_show_rdrv_10()
2684  * @m: Synthetic file construction data
2685  * @v: File iterator
2686  *
2687  * Display real time information about the logical drives 0 through 9.
2688  */
2689 static int
2690 proc_show_rdrv_10(struct seq_file *m, void *v)
2691 {
2692         return proc_show_rdrv(m, m->private, 0, 9);
2693 }
2694
2695
2696 /**
2697  * proc_show_rdrv_20()
2698  * @m: Synthetic file construction data
2699  * @v: File iterator
2700  *
2701  * Display real time information about the logical drives 0 through 9.
2702  */
2703 static int
2704 proc_show_rdrv_20(struct seq_file *m, void *v)
2705 {
2706         return proc_show_rdrv(m, m->private, 10, 19);
2707 }
2708
2709
2710 /**
2711  * proc_show_rdrv_30()
2712  * @m: Synthetic file construction data
2713  * @v: File iterator
2714  *
2715  * Display real time information about the logical drives 0 through 9.
2716  */
2717 static int
2718 proc_show_rdrv_30(struct seq_file *m, void *v)
2719 {
2720         return proc_show_rdrv(m, m->private, 20, 29);
2721 }
2722
2723
2724 /**
2725  * proc_show_rdrv_40()
2726  * @m: Synthetic file construction data
2727  * @v: File iterator
2728  *
2729  * Display real time information about the logical drives 0 through 9.
2730  */
2731 static int
2732 proc_show_rdrv_40(struct seq_file *m, void *v)
2733 {
2734         return proc_show_rdrv(m, m->private, 30, 39);
2735 }
2736
2737 /**
2738  * mega_create_proc_entry()
2739  * @index: index in soft state array
2740  * @parent: parent node for this /proc entry
2741  *
2742  * Creates /proc entries for our controllers.
2743  */
2744 static void
2745 mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2746 {
2747         adapter_t *adapter = hba_soft_state[index];
2748         struct proc_dir_entry *dir;
2749         u8 string[16];
2750
2751         sprintf(string, "hba%d", adapter->host->host_no);
2752         dir = proc_mkdir_data(string, 0, parent, adapter);
2753         if (!dir) {
2754                 dev_warn(&adapter->dev->dev, "proc_mkdir failed\n");
2755                 return;
2756         }
2757
2758         proc_create_single_data("config", S_IRUSR, dir,
2759                         proc_show_config, adapter);
2760         proc_create_single_data("stat", S_IRUSR, dir,
2761                         proc_show_stat, adapter);
2762         proc_create_single_data("mailbox", S_IRUSR, dir,
2763                         proc_show_mbox, adapter);
2764 #if MEGA_HAVE_ENH_PROC
2765         proc_create_single_data("rebuild-rate", S_IRUSR, dir,
2766                         proc_show_rebuild_rate, adapter);
2767         proc_create_single_data("battery-status", S_IRUSR, dir,
2768                         proc_show_battery, adapter);
2769         proc_create_single_data("diskdrives-ch0", S_IRUSR, dir,
2770                         proc_show_pdrv_ch0, adapter);
2771         proc_create_single_data("diskdrives-ch1", S_IRUSR, dir,
2772                         proc_show_pdrv_ch1, adapter);
2773         proc_create_single_data("diskdrives-ch2", S_IRUSR, dir,
2774                         proc_show_pdrv_ch2, adapter);
2775         proc_create_single_data("diskdrives-ch3", S_IRUSR, dir,
2776                         proc_show_pdrv_ch3, adapter);
2777         proc_create_single_data("raiddrives-0-9", S_IRUSR, dir,
2778                         proc_show_rdrv_10, adapter);
2779         proc_create_single_data("raiddrives-10-19", S_IRUSR, dir,
2780                         proc_show_rdrv_20, adapter);
2781         proc_create_single_data("raiddrives-20-29", S_IRUSR, dir,
2782                         proc_show_rdrv_30, adapter);
2783         proc_create_single_data("raiddrives-30-39", S_IRUSR, dir,
2784                         proc_show_rdrv_40, adapter);
2785 #endif
2786 }
2787
2788 #else
2789 static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2790 {
2791 }
2792 #endif
2793
2794
2795 /*
2796  * megaraid_biosparam()
2797  *
2798  * Return the disk geometry for a particular disk
2799  */
2800 static int
2801 megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
2802                     sector_t capacity, int geom[])
2803 {
2804         adapter_t       *adapter;
2805         int     heads;
2806         int     sectors;
2807         int     cylinders;
2808
2809         /* Get pointer to host config structure */
2810         adapter = (adapter_t *)sdev->host->hostdata;
2811
2812         if (IS_RAID_CH(adapter, sdev->channel)) {
2813                         /* Default heads (64) & sectors (32) */
2814                         heads = 64;
2815                         sectors = 32;
2816                         cylinders = (ulong)capacity / (heads * sectors);
2817
2818                         /*
2819                          * Handle extended translation size for logical drives
2820                          * > 1Gb
2821                          */
2822                         if ((ulong)capacity >= 0x200000) {
2823                                 heads = 255;
2824                                 sectors = 63;
2825                                 cylinders = (ulong)capacity / (heads * sectors);
2826                         }
2827
2828                         /* return result */
2829                         geom[0] = heads;
2830                         geom[1] = sectors;
2831                         geom[2] = cylinders;
2832         }
2833         else {
2834                 if (scsi_partsize(bdev, capacity, geom))
2835                         return 0;
2836
2837                 dev_info(&adapter->dev->dev,
2838                          "invalid partition on this disk on channel %d\n",
2839                          sdev->channel);
2840
2841                 /* Default heads (64) & sectors (32) */
2842                 heads = 64;
2843                 sectors = 32;
2844                 cylinders = (ulong)capacity / (heads * sectors);
2845
2846                 /* Handle extended translation size for logical drives > 1Gb */
2847                 if ((ulong)capacity >= 0x200000) {
2848                         heads = 255;
2849                         sectors = 63;
2850                         cylinders = (ulong)capacity / (heads * sectors);
2851                 }
2852
2853                 /* return result */
2854                 geom[0] = heads;
2855                 geom[1] = sectors;
2856                 geom[2] = cylinders;
2857         }
2858
2859         return 0;
2860 }
2861
2862 /**
2863  * mega_init_scb()
2864  * @adapter: pointer to our soft state
2865  *
2866  * Allocate memory for the various pointers in the scb structures:
2867  * scatter-gather list pointer, passthru and extended passthru structure
2868  * pointers.
2869  */
2870 static int
2871 mega_init_scb(adapter_t *adapter)
2872 {
2873         scb_t   *scb;
2874         int     i;
2875
2876         for( i = 0; i < adapter->max_cmds; i++ ) {
2877
2878                 scb = &adapter->scb_list[i];
2879
2880                 scb->sgl64 = NULL;
2881                 scb->sgl = NULL;
2882                 scb->pthru = NULL;
2883                 scb->epthru = NULL;
2884         }
2885
2886         for( i = 0; i < adapter->max_cmds; i++ ) {
2887
2888                 scb = &adapter->scb_list[i];
2889
2890                 scb->idx = i;
2891
2892                 scb->sgl64 = dma_alloc_coherent(&adapter->dev->dev,
2893                                                 sizeof(mega_sgl64) * adapter->sglen,
2894                                                 &scb->sgl_dma_addr, GFP_KERNEL);
2895
2896                 scb->sgl = (mega_sglist *)scb->sgl64;
2897
2898                 if( !scb->sgl ) {
2899                         dev_warn(&adapter->dev->dev, "RAID: Can't allocate sglist\n");
2900                         mega_free_sgl(adapter);
2901                         return -1;
2902                 }
2903
2904                 scb->pthru = dma_alloc_coherent(&adapter->dev->dev,
2905                                                 sizeof(mega_passthru),
2906                                                 &scb->pthru_dma_addr, GFP_KERNEL);
2907
2908                 if( !scb->pthru ) {
2909                         dev_warn(&adapter->dev->dev, "RAID: Can't allocate passthru\n");
2910                         mega_free_sgl(adapter);
2911                         return -1;
2912                 }
2913
2914                 scb->epthru = dma_alloc_coherent(&adapter->dev->dev,
2915                                                  sizeof(mega_ext_passthru),
2916                                                  &scb->epthru_dma_addr, GFP_KERNEL);
2917
2918                 if( !scb->epthru ) {
2919                         dev_warn(&adapter->dev->dev,
2920                                 "Can't allocate extended passthru\n");
2921                         mega_free_sgl(adapter);
2922                         return -1;
2923                 }
2924
2925
2926                 scb->dma_type = MEGA_DMA_TYPE_NONE;
2927
2928                 /*
2929                  * Link to free list
2930                  * lock not required since we are loading the driver, so no
2931                  * commands possible right now.
2932                  */
2933                 scb->state = SCB_FREE;
2934                 scb->cmd = NULL;
2935                 list_add(&scb->list, &adapter->free_list);
2936         }
2937
2938         return 0;
2939 }
2940
2941
2942 /**
2943  * megadev_open()
2944  * @inode: unused
2945  * @filep: unused
2946  *
2947  * Routines for the character/ioctl interface to the driver. Find out if this
2948  * is a valid open.
2949  */
2950 static int
2951 megadev_open (struct inode *inode, struct file *filep)
2952 {
2953         /*
2954          * Only allow superuser to access private ioctl interface
2955          */
2956         if( !capable(CAP_SYS_ADMIN) ) return -EACCES;
2957
2958         return 0;
2959 }
2960
2961
2962 /**
2963  * megadev_ioctl()
2964  * @filep: Our device file
2965  * @cmd: ioctl command
2966  * @arg: user buffer
2967  *
2968  * ioctl entry point for our private ioctl interface. We move the data in from
2969  * the user space, prepare the command (if necessary, convert the old MIMD
2970  * ioctl to new ioctl command), and issue a synchronous command to the
2971  * controller.
2972  */
2973 static int
2974 megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
2975 {
2976         adapter_t       *adapter;
2977         nitioctl_t      uioc;
2978         int             adapno;
2979         int             rval;
2980         mega_passthru   __user *upthru; /* user address for passthru */
2981         mega_passthru   *pthru;         /* copy user passthru here */
2982         dma_addr_t      pthru_dma_hndl;
2983         void            *data = NULL;   /* data to be transferred */
2984         dma_addr_t      data_dma_hndl;  /* dma handle for data xfer area */
2985         megacmd_t       mc;
2986 #if MEGA_HAVE_STATS
2987         megastat_t      __user *ustats = NULL;
2988         int             num_ldrv = 0;
2989 #endif
2990         u32             uxferaddr = 0;
2991         struct pci_dev  *pdev;
2992
2993         /*
2994          * Make sure only USCSICMD are issued through this interface.
2995          * MIMD application would still fire different command.
2996          */
2997         if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
2998                 return -EINVAL;
2999         }
3000
3001         /*
3002          * Check and convert a possible MIMD command to NIT command.
3003          * mega_m_to_n() copies the data from the user space, so we do not
3004          * have to do it here.
3005          * NOTE: We will need some user address to copyout the data, therefore
3006          * the inteface layer will also provide us with the required user
3007          * addresses.
3008          */
3009         memset(&uioc, 0, sizeof(nitioctl_t));
3010         if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
3011                 return rval;
3012
3013
3014         switch( uioc.opcode ) {
3015
3016         case GET_DRIVER_VER:
3017                 if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
3018                         return (-EFAULT);
3019
3020                 break;
3021
3022         case GET_N_ADAP:
3023                 if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
3024                         return (-EFAULT);
3025
3026                 /*
3027                  * Shucks. MIMD interface returns a positive value for number
3028                  * of adapters. TODO: Change it to return 0 when there is no
3029                  * applicatio using mimd interface.
3030                  */
3031                 return hba_count;
3032
3033         case GET_ADAP_INFO:
3034
3035                 /*
3036                  * Which adapter
3037                  */
3038                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3039                         return (-ENODEV);
3040
3041                 if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
3042                                 sizeof(struct mcontroller)) )
3043                         return (-EFAULT);
3044                 break;
3045
3046 #if MEGA_HAVE_STATS
3047
3048         case GET_STATS:
3049                 /*
3050                  * Which adapter
3051                  */
3052                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3053                         return (-ENODEV);
3054
3055                 adapter = hba_soft_state[adapno];
3056
3057                 ustats = uioc.uioc_uaddr;
3058
3059                 if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
3060                         return (-EFAULT);
3061
3062                 /*
3063                  * Check for the validity of the logical drive number
3064                  */
3065                 if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
3066
3067                 if( copy_to_user(ustats->nreads, adapter->nreads,
3068                                         num_ldrv*sizeof(u32)) )
3069                         return -EFAULT;
3070
3071                 if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
3072                                         num_ldrv*sizeof(u32)) )
3073                         return -EFAULT;
3074
3075                 if( copy_to_user(ustats->nwrites, adapter->nwrites,
3076                                         num_ldrv*sizeof(u32)) )
3077                         return -EFAULT;
3078
3079                 if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
3080                                         num_ldrv*sizeof(u32)) )
3081                         return -EFAULT;
3082
3083                 if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
3084                                         num_ldrv*sizeof(u32)) )
3085                         return -EFAULT;
3086
3087                 if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
3088                                         num_ldrv*sizeof(u32)) )
3089                         return -EFAULT;
3090
3091                 return 0;
3092
3093 #endif
3094         case MBOX_CMD:
3095
3096                 /*
3097                  * Which adapter
3098                  */
3099                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3100                         return (-ENODEV);
3101
3102                 adapter = hba_soft_state[adapno];
3103
3104                 /*
3105                  * Deletion of logical drive is a special case. The adapter
3106                  * should be quiescent before this command is issued.
3107                  */
3108                 if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
3109                                 uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
3110
3111                         /*
3112                          * Do we support this feature
3113                          */
3114                         if( !adapter->support_random_del ) {
3115                                 dev_warn(&adapter->dev->dev, "logdrv "
3116                                         "delete on non-supporting F/W\n");
3117
3118                                 return (-EINVAL);
3119                         }
3120
3121                         rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
3122
3123                         if( rval == 0 ) {
3124                                 memset(&mc, 0, sizeof(megacmd_t));
3125
3126                                 mc.status = rval;
3127
3128                                 rval = mega_n_to_m((void __user *)arg, &mc);
3129                         }
3130
3131                         return rval;
3132                 }
3133                 /*
3134                  * This interface only support the regular passthru commands.
3135                  * Reject extended passthru and 64-bit passthru
3136                  */
3137                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
3138                         uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
3139
3140                         dev_warn(&adapter->dev->dev, "rejected passthru\n");
3141
3142                         return (-EINVAL);
3143                 }
3144
3145                 /*
3146                  * For all internal commands, the buffer must be allocated in
3147                  * <4GB address range
3148                  */
3149                 if( make_local_pdev(adapter, &pdev) != 0 )
3150                         return -EIO;
3151
3152                 /* Is it a passthru command or a DCMD */
3153                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
3154                         /* Passthru commands */
3155
3156                         pthru = dma_alloc_coherent(&pdev->dev,
3157                                                    sizeof(mega_passthru),
3158                                                    &pthru_dma_hndl, GFP_KERNEL);
3159
3160                         if( pthru == NULL ) {
3161                                 free_local_pdev(pdev);
3162                                 return (-ENOMEM);
3163                         }
3164
3165                         /*
3166                          * The user passthru structure
3167                          */
3168                         upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr;
3169
3170                         /*
3171                          * Copy in the user passthru here.
3172                          */
3173                         if( copy_from_user(pthru, upthru,
3174                                                 sizeof(mega_passthru)) ) {
3175
3176                                 dma_free_coherent(&pdev->dev,
3177                                                   sizeof(mega_passthru),
3178                                                   pthru, pthru_dma_hndl);
3179
3180                                 free_local_pdev(pdev);
3181
3182                                 return (-EFAULT);
3183                         }
3184
3185                         /*
3186                          * Is there a data transfer
3187                          */
3188                         if( pthru->dataxferlen ) {
3189                                 data = dma_alloc_coherent(&pdev->dev,
3190                                                           pthru->dataxferlen,
3191                                                           &data_dma_hndl,
3192                                                           GFP_KERNEL);
3193
3194                                 if( data == NULL ) {
3195                                         dma_free_coherent(&pdev->dev,
3196                                                           sizeof(mega_passthru),
3197                                                           pthru,
3198                                                           pthru_dma_hndl);
3199
3200                                         free_local_pdev(pdev);
3201
3202                                         return (-ENOMEM);
3203                                 }
3204
3205                                 /*
3206                                  * Save the user address and point the kernel
3207                                  * address at just allocated memory
3208                                  */
3209                                 uxferaddr = pthru->dataxferaddr;
3210                                 pthru->dataxferaddr = data_dma_hndl;
3211                         }
3212
3213
3214                         /*
3215                          * Is data coming down-stream
3216                          */
3217                         if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) {
3218                                 /*
3219                                  * Get the user data
3220                                  */
3221                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3222                                                         pthru->dataxferlen) ) {
3223                                         rval = (-EFAULT);
3224                                         goto freemem_and_return;
3225                                 }
3226                         }
3227
3228                         memset(&mc, 0, sizeof(megacmd_t));
3229
3230                         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
3231                         mc.xferaddr = (u32)pthru_dma_hndl;
3232
3233                         /*
3234                          * Issue the command
3235                          */
3236                         mega_internal_command(adapter, &mc, pthru);
3237
3238                         rval = mega_n_to_m((void __user *)arg, &mc);
3239
3240                         if( rval ) goto freemem_and_return;
3241
3242
3243                         /*
3244                          * Is data going up-stream
3245                          */
3246                         if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
3247                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3248                                                         pthru->dataxferlen) ) {
3249                                         rval = (-EFAULT);
3250                                 }
3251                         }
3252
3253                         /*
3254                          * Send the request sense data also, irrespective of
3255                          * whether the user has asked for it or not.
3256                          */
3257                         if (copy_to_user(upthru->reqsensearea,
3258                                         pthru->reqsensearea, 14))
3259                                 rval = -EFAULT;
3260
3261 freemem_and_return:
3262                         if( pthru->dataxferlen ) {
3263                                 dma_free_coherent(&pdev->dev,
3264                                                   pthru->dataxferlen, data,
3265                                                   data_dma_hndl);
3266                         }
3267
3268                         dma_free_coherent(&pdev->dev, sizeof(mega_passthru),
3269                                           pthru, pthru_dma_hndl);
3270
3271                         free_local_pdev(pdev);
3272
3273                         return rval;
3274                 }
3275                 else {
3276                         /* DCMD commands */
3277
3278                         /*
3279                          * Is there a data transfer
3280                          */
3281                         if( uioc.xferlen ) {
3282                                 data = dma_alloc_coherent(&pdev->dev,
3283                                                           uioc.xferlen,
3284                                                           &data_dma_hndl,
3285                                                           GFP_KERNEL);
3286
3287                                 if( data == NULL ) {
3288                                         free_local_pdev(pdev);
3289                                         return (-ENOMEM);
3290                                 }
3291
3292                                 uxferaddr = MBOX(uioc)->xferaddr;
3293                         }
3294
3295                         /*
3296                          * Is data coming down-stream
3297                          */
3298                         if( uioc.xferlen && (uioc.flags & UIOC_WR) ) {
3299                                 /*
3300                                  * Get the user data
3301                                  */
3302                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3303                                                         uioc.xferlen) ) {
3304
3305                                         dma_free_coherent(&pdev->dev,
3306                                                           uioc.xferlen, data,
3307                                                           data_dma_hndl);
3308
3309                                         free_local_pdev(pdev);
3310
3311                                         return (-EFAULT);
3312                                 }
3313                         }
3314
3315                         memcpy(&mc, MBOX(uioc), sizeof(megacmd_t));
3316
3317                         mc.xferaddr = (u32)data_dma_hndl;
3318
3319                         /*
3320                          * Issue the command
3321                          */
3322                         mega_internal_command(adapter, &mc, NULL);
3323
3324                         rval = mega_n_to_m((void __user *)arg, &mc);
3325
3326                         if( rval ) {
3327                                 if( uioc.xferlen ) {
3328                                         dma_free_coherent(&pdev->dev,
3329                                                           uioc.xferlen, data,
3330                                                           data_dma_hndl);
3331                                 }
3332
3333                                 free_local_pdev(pdev);
3334
3335                                 return rval;
3336                         }
3337
3338                         /*
3339                          * Is data going up-stream
3340                          */
3341                         if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
3342                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3343                                                         uioc.xferlen) ) {
3344
3345                                         rval = (-EFAULT);
3346                                 }
3347                         }
3348
3349                         if( uioc.xferlen ) {
3350                                 dma_free_coherent(&pdev->dev, uioc.xferlen,
3351                                                   data, data_dma_hndl);
3352                         }
3353
3354                         free_local_pdev(pdev);
3355
3356                         return rval;
3357                 }
3358
3359         default:
3360                 return (-EINVAL);
3361         }
3362
3363         return 0;
3364 }
3365
3366 static long
3367 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3368 {
3369         int ret;
3370
3371         mutex_lock(&megadev_mutex);
3372         ret = megadev_ioctl(filep, cmd, arg);
3373         mutex_unlock(&megadev_mutex);
3374
3375         return ret;
3376 }
3377
3378 /**
3379  * mega_m_to_n()
3380  * @arg: user address
3381  * @uioc: new ioctl structure
3382  *
3383  * A thin layer to convert older mimd interface ioctl structure to NIT ioctl
3384  * structure
3385  *
3386  * Converts the older mimd ioctl structure to newer NIT structure
3387  */
3388 static int
3389 mega_m_to_n(void __user *arg, nitioctl_t *uioc)
3390 {
3391         struct uioctl_t uioc_mimd;
3392         char    signature[8] = {0};
3393         u8      opcode;
3394         u8      subopcode;
3395
3396
3397         /*
3398          * check is the application conforms to NIT. We do not have to do much
3399          * in that case.
3400          * We exploit the fact that the signature is stored in the very
3401          * beginning of the structure.
3402          */
3403
3404         if( copy_from_user(signature, arg, 7) )
3405                 return (-EFAULT);
3406
3407         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3408
3409                 /*
3410                  * NOTE NOTE: The nit ioctl is still under flux because of
3411                  * change of mailbox definition, in HPE. No applications yet
3412                  * use this interface and let's not have applications use this
3413                  * interface till the new specifitions are in place.
3414                  */
3415                 return -EINVAL;
3416 #if 0
3417                 if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
3418                         return (-EFAULT);
3419                 return 0;
3420 #endif
3421         }
3422
3423         /*
3424          * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
3425          *
3426          * Get the user ioctl structure
3427          */
3428         if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
3429                 return (-EFAULT);
3430
3431
3432         /*
3433          * Get the opcode and subopcode for the commands
3434          */
3435         opcode = uioc_mimd.ui.fcs.opcode;
3436         subopcode = uioc_mimd.ui.fcs.subopcode;
3437
3438         switch (opcode) {
3439         case 0x82:
3440
3441                 switch (subopcode) {
3442
3443                 case MEGAIOC_QDRVRVER:  /* Query driver version */
3444                         uioc->opcode = GET_DRIVER_VER;
3445                         uioc->uioc_uaddr = uioc_mimd.data;
3446                         break;
3447
3448                 case MEGAIOC_QNADAP:    /* Get # of adapters */
3449                         uioc->opcode = GET_N_ADAP;
3450                         uioc->uioc_uaddr = uioc_mimd.data;
3451                         break;
3452
3453                 case MEGAIOC_QADAPINFO: /* Get adapter information */
3454                         uioc->opcode = GET_ADAP_INFO;
3455                         uioc->adapno = uioc_mimd.ui.fcs.adapno;
3456                         uioc->uioc_uaddr = uioc_mimd.data;
3457                         break;
3458
3459                 default:
3460                         return(-EINVAL);
3461                 }
3462
3463                 break;
3464
3465
3466         case 0x81:
3467
3468                 uioc->opcode = MBOX_CMD;
3469                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3470
3471                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3472
3473                 uioc->xferlen = uioc_mimd.ui.fcs.length;
3474
3475                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3476                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3477
3478                 break;
3479
3480         case 0x80:
3481
3482                 uioc->opcode = MBOX_CMD;
3483                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3484
3485                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3486
3487                 /*
3488                  * Choose the xferlen bigger of input and output data
3489                  */
3490                 uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
3491                         uioc_mimd.outlen : uioc_mimd.inlen;
3492
3493                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3494                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3495
3496                 break;
3497
3498         default:
3499                 return (-EINVAL);
3500
3501         }
3502
3503         return 0;
3504 }
3505
3506 /*
3507  * mega_n_to_m()
3508  * @arg: user address
3509  * @mc: mailbox command
3510  *
3511  * Updates the status information to the application, depending on application
3512  * conforms to older mimd ioctl interface or newer NIT ioctl interface
3513  */
3514 static int
3515 mega_n_to_m(void __user *arg, megacmd_t *mc)
3516 {
3517         nitioctl_t      __user *uiocp;
3518         megacmd_t       __user *umc;
3519         mega_passthru   __user *upthru;
3520         struct uioctl_t __user *uioc_mimd;
3521         char    signature[8] = {0};
3522
3523         /*
3524          * check is the application conforms to NIT.
3525          */
3526         if( copy_from_user(signature, arg, 7) )
3527                 return -EFAULT;
3528
3529         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3530
3531                 uiocp = arg;
3532
3533                 if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
3534                         return (-EFAULT);
3535
3536                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3537
3538                         umc = MBOX_P(uiocp);
3539
3540                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3541                                 return -EFAULT;
3542
3543                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
3544                                 return (-EFAULT);
3545                 }
3546         }
3547         else {
3548                 uioc_mimd = arg;
3549
3550                 if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
3551                         return (-EFAULT);
3552
3553                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3554
3555                         umc = (megacmd_t __user *)uioc_mimd->mbox;
3556
3557                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3558                                 return (-EFAULT);
3559
3560                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
3561                                 return (-EFAULT);
3562                 }
3563         }
3564
3565         return 0;
3566 }
3567
3568
3569 /*
3570  * MEGARAID 'FW' commands.
3571  */
3572
3573 /**
3574  * mega_is_bios_enabled()
3575  * @adapter: pointer to our soft state
3576  *
3577  * issue command to find out if the BIOS is enabled for this controller
3578  */
3579 static int
3580 mega_is_bios_enabled(adapter_t *adapter)
3581 {
3582         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3583         mbox_t  *mbox;
3584
3585         mbox = (mbox_t *)raw_mbox;
3586
3587         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3588
3589         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3590
3591         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3592
3593         raw_mbox[0] = IS_BIOS_ENABLED;
3594         raw_mbox[2] = GET_BIOS;
3595
3596         issue_scb_block(adapter, raw_mbox);
3597
3598         return *(char *)adapter->mega_buffer;
3599 }
3600
3601
3602 /**
3603  * mega_enum_raid_scsi()
3604  * @adapter: pointer to our soft state
3605  *
3606  * Find out what channels are RAID/SCSI. This information is used to
3607  * differentiate the virtual channels and physical channels and to support
3608  * ROMB feature and non-disk devices.
3609  */
3610 static void
3611 mega_enum_raid_scsi(adapter_t *adapter)
3612 {
3613         unsigned char raw_mbox[sizeof(struct mbox_out)];
3614         mbox_t *mbox;
3615         int i;
3616
3617         mbox = (mbox_t *)raw_mbox;
3618
3619         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3620
3621         /*
3622          * issue command to find out what channels are raid/scsi
3623          */
3624         raw_mbox[0] = CHNL_CLASS;
3625         raw_mbox[2] = GET_CHNL_CLASS;
3626
3627         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3628
3629         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3630
3631         /*
3632          * Non-ROMB firmware fail this command, so all channels
3633          * must be shown RAID
3634          */
3635         adapter->mega_ch_class = 0xFF;
3636
3637         if(!issue_scb_block(adapter, raw_mbox)) {
3638                 adapter->mega_ch_class = *((char *)adapter->mega_buffer);
3639
3640         }
3641
3642         for( i = 0; i < adapter->product_info.nchannels; i++ ) {
3643                 if( (adapter->mega_ch_class >> i) & 0x01 ) {
3644                         dev_info(&adapter->dev->dev, "channel[%d] is raid\n",
3645                                         i);
3646                 }
3647                 else {
3648                         dev_info(&adapter->dev->dev, "channel[%d] is scsi\n",
3649                                         i);
3650                 }
3651         }
3652
3653         return;
3654 }
3655
3656
3657 /**
3658  * mega_get_boot_drv()
3659  * @adapter: pointer to our soft state
3660  *
3661  * Find out which device is the boot device. Note, any logical drive or any
3662  * phyical device (e.g., a CDROM) can be designated as a boot device.
3663  */
3664 static void
3665 mega_get_boot_drv(adapter_t *adapter)
3666 {
3667         struct private_bios_data        *prv_bios_data;
3668         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3669         mbox_t  *mbox;
3670         u16     cksum = 0;
3671         u8      *cksum_p;
3672         u8      boot_pdrv;
3673         int     i;
3674
3675         mbox = (mbox_t *)raw_mbox;
3676
3677         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3678
3679         raw_mbox[0] = BIOS_PVT_DATA;
3680         raw_mbox[2] = GET_BIOS_PVT_DATA;
3681
3682         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3683
3684         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3685
3686         adapter->boot_ldrv_enabled = 0;
3687         adapter->boot_ldrv = 0;
3688
3689         adapter->boot_pdrv_enabled = 0;
3690         adapter->boot_pdrv_ch = 0;
3691         adapter->boot_pdrv_tgt = 0;
3692
3693         if(issue_scb_block(adapter, raw_mbox) == 0) {
3694                 prv_bios_data =
3695                         (struct private_bios_data *)adapter->mega_buffer;
3696
3697                 cksum = 0;
3698                 cksum_p = (char *)prv_bios_data;
3699                 for (i = 0; i < 14; i++ ) {
3700                         cksum += (u16)(*cksum_p++);
3701                 }
3702
3703                 if (prv_bios_data->cksum == (u16)(0-cksum) ) {
3704
3705                         /*
3706                          * If MSB is set, a physical drive is set as boot
3707                          * device
3708                          */
3709                         if( prv_bios_data->boot_drv & 0x80 ) {
3710                                 adapter->boot_pdrv_enabled = 1;
3711                                 boot_pdrv = prv_bios_data->boot_drv & 0x7F;
3712                                 adapter->boot_pdrv_ch = boot_pdrv / 16;
3713                                 adapter->boot_pdrv_tgt = boot_pdrv % 16;
3714                         }
3715                         else {
3716                                 adapter->boot_ldrv_enabled = 1;
3717                                 adapter->boot_ldrv = prv_bios_data->boot_drv;
3718                         }
3719                 }
3720         }
3721
3722 }
3723
3724 /**
3725  * mega_support_random_del()
3726  * @adapter: pointer to our soft state
3727  *
3728  * Find out if this controller supports random deletion and addition of
3729  * logical drives
3730  */
3731 static int
3732 mega_support_random_del(adapter_t *adapter)
3733 {
3734         unsigned char raw_mbox[sizeof(struct mbox_out)];
3735         mbox_t *mbox;
3736         int rval;
3737
3738         mbox = (mbox_t *)raw_mbox;
3739
3740         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3741
3742         /*
3743          * issue command
3744          */
3745         raw_mbox[0] = FC_DEL_LOGDRV;
3746         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3747
3748         rval = issue_scb_block(adapter, raw_mbox);
3749
3750         return !rval;
3751 }
3752
3753
3754 /**
3755  * mega_support_ext_cdb()
3756  * @adapter: pointer to our soft state
3757  *
3758  * Find out if this firmware support cdblen > 10
3759  */
3760 static int
3761 mega_support_ext_cdb(adapter_t *adapter)
3762 {
3763         unsigned char raw_mbox[sizeof(struct mbox_out)];
3764         mbox_t *mbox;
3765         int rval;
3766
3767         mbox = (mbox_t *)raw_mbox;
3768
3769         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3770         /*
3771          * issue command to find out if controller supports extended CDBs.
3772          */
3773         raw_mbox[0] = 0xA4;
3774         raw_mbox[2] = 0x16;
3775
3776         rval = issue_scb_block(adapter, raw_mbox);
3777
3778         return !rval;
3779 }
3780
3781
3782 /**
3783  * mega_del_logdrv()
3784  * @adapter: pointer to our soft state
3785  * @logdrv: logical drive to be deleted
3786  *
3787  * Delete the specified logical drive. It is the responsibility of the user
3788  * app to let the OS know about this operation.
3789  */
3790 static int
3791 mega_del_logdrv(adapter_t *adapter, int logdrv)
3792 {
3793         unsigned long flags;
3794         scb_t *scb;
3795         int rval;
3796
3797         /*
3798          * Stop sending commands to the controller, queue them internally.
3799          * When deletion is complete, ISR will flush the queue.
3800          */
3801         atomic_set(&adapter->quiescent, 1);
3802
3803         /*
3804          * Wait till all the issued commands are complete and there are no
3805          * commands in the pending queue
3806          */
3807         while (atomic_read(&adapter->pend_cmds) > 0 ||
3808                !list_empty(&adapter->pending_list))
3809                 msleep(1000);   /* sleep for 1s */
3810
3811         rval = mega_do_del_logdrv(adapter, logdrv);
3812
3813         spin_lock_irqsave(&adapter->lock, flags);
3814
3815         /*
3816          * If delete operation was successful, add 0x80 to the logical drive
3817          * ids for commands in the pending queue.
3818          */
3819         if (adapter->read_ldidmap) {
3820                 struct list_head *pos;
3821                 list_for_each(pos, &adapter->pending_list) {
3822                         scb = list_entry(pos, scb_t, list);
3823                         if (scb->pthru->logdrv < 0x80 )
3824                                 scb->pthru->logdrv += 0x80;
3825                 }
3826         }
3827
3828         atomic_set(&adapter->quiescent, 0);
3829
3830         mega_runpendq(adapter);
3831
3832         spin_unlock_irqrestore(&adapter->lock, flags);
3833
3834         return rval;
3835 }
3836
3837
3838 static int
3839 mega_do_del_logdrv(adapter_t *adapter, int logdrv)
3840 {
3841         megacmd_t       mc;
3842         int     rval;
3843
3844         memset( &mc, 0, sizeof(megacmd_t));
3845
3846         mc.cmd = FC_DEL_LOGDRV;
3847         mc.opcode = OP_DEL_LOGDRV;
3848         mc.subopcode = logdrv;
3849
3850         rval = mega_internal_command(adapter, &mc, NULL);
3851
3852         /* log this event */
3853         if(rval) {
3854                 dev_warn(&adapter->dev->dev, "Delete LD-%d failed", logdrv);
3855                 return rval;
3856         }
3857
3858         /*
3859          * After deleting first logical drive, the logical drives must be
3860          * addressed by adding 0x80 to the logical drive id.
3861          */
3862         adapter->read_ldidmap = 1;
3863
3864         return rval;
3865 }
3866
3867
3868 /**
3869  * mega_get_max_sgl()
3870  * @adapter: pointer to our soft state
3871  *
3872  * Find out the maximum number of scatter-gather elements supported by this
3873  * version of the firmware
3874  */
3875 static void
3876 mega_get_max_sgl(adapter_t *adapter)
3877 {
3878         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3879         mbox_t  *mbox;
3880
3881         mbox = (mbox_t *)raw_mbox;
3882
3883         memset(mbox, 0, sizeof(raw_mbox));
3884
3885         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3886
3887         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3888
3889         raw_mbox[0] = MAIN_MISC_OPCODE;
3890         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3891
3892
3893         if( issue_scb_block(adapter, raw_mbox) ) {
3894                 /*
3895                  * f/w does not support this command. Choose the default value
3896                  */
3897                 adapter->sglen = MIN_SGLIST;
3898         }
3899         else {
3900                 adapter->sglen = *((char *)adapter->mega_buffer);
3901
3902                 /*
3903                  * Make sure this is not more than the resources we are
3904                  * planning to allocate
3905                  */
3906                 if ( adapter->sglen > MAX_SGLIST )
3907                         adapter->sglen = MAX_SGLIST;
3908         }
3909
3910         return;
3911 }
3912
3913
3914 /**
3915  * mega_support_cluster()
3916  * @adapter: pointer to our soft state
3917  *
3918  * Find out if this firmware support cluster calls.
3919  */
3920 static int
3921 mega_support_cluster(adapter_t *adapter)
3922 {
3923         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3924         mbox_t  *mbox;
3925
3926         mbox = (mbox_t *)raw_mbox;
3927
3928         memset(mbox, 0, sizeof(raw_mbox));
3929
3930         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3931
3932         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3933
3934         /*
3935          * Try to get the initiator id. This command will succeed iff the
3936          * clustering is available on this HBA.
3937          */
3938         raw_mbox[0] = MEGA_GET_TARGET_ID;
3939
3940         if( issue_scb_block(adapter, raw_mbox) == 0 ) {
3941
3942                 /*
3943                  * Cluster support available. Get the initiator target id.
3944                  * Tell our id to mid-layer too.
3945                  */
3946                 adapter->this_id = *(u32 *)adapter->mega_buffer;
3947                 adapter->host->this_id = adapter->this_id;
3948
3949                 return 1;
3950         }
3951
3952         return 0;
3953 }
3954
3955 #ifdef CONFIG_PROC_FS
3956 /**
3957  * mega_adapinq()
3958  * @adapter: pointer to our soft state
3959  * @dma_handle: DMA address of the buffer
3960  *
3961  * Issue internal commands while interrupts are available.
3962  * We only issue direct mailbox commands from within the driver. ioctl()
3963  * interface using these routines can issue passthru commands.
3964  */
3965 static int
3966 mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle)
3967 {
3968         megacmd_t       mc;
3969
3970         memset(&mc, 0, sizeof(megacmd_t));
3971
3972         if( adapter->flag & BOARD_40LD ) {
3973                 mc.cmd = FC_NEW_CONFIG;
3974                 mc.opcode = NC_SUBOP_ENQUIRY3;
3975                 mc.subopcode = ENQ3_GET_SOLICITED_FULL;
3976         }
3977         else {
3978                 mc.cmd = MEGA_MBOXCMD_ADPEXTINQ;
3979         }
3980
3981         mc.xferaddr = (u32)dma_handle;
3982
3983         if ( mega_internal_command(adapter, &mc, NULL) != 0 ) {
3984                 return -1;
3985         }
3986
3987         return 0;
3988 }
3989
3990
3991 /**
3992  * mega_internal_dev_inquiry()
3993  * @adapter: pointer to our soft state
3994  * @ch: channel for this device
3995  * @tgt: ID of this device
3996  * @buf_dma_handle: DMA address of the buffer
3997  *
3998  * Issue the scsi inquiry for the specified device.
3999  */
4000 static int
4001 mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt,
4002                 dma_addr_t buf_dma_handle)
4003 {
4004         mega_passthru   *pthru;
4005         dma_addr_t      pthru_dma_handle;
4006         megacmd_t       mc;
4007         int             rval;
4008         struct pci_dev  *pdev;
4009
4010
4011         /*
4012          * For all internal commands, the buffer must be allocated in <4GB
4013          * address range
4014          */
4015         if( make_local_pdev(adapter, &pdev) != 0 ) return -1;
4016
4017         pthru = dma_alloc_coherent(&pdev->dev, sizeof(mega_passthru),
4018                                    &pthru_dma_handle, GFP_KERNEL);
4019
4020         if( pthru == NULL ) {
4021                 free_local_pdev(pdev);
4022                 return -1;
4023         }
4024
4025         pthru->timeout = 2;
4026         pthru->ars = 1;
4027         pthru->reqsenselen = 14;
4028         pthru->islogical = 0;
4029
4030         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch;
4031
4032         pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt;
4033
4034         pthru->cdblen = 6;
4035
4036         pthru->cdb[0] = INQUIRY;
4037         pthru->cdb[1] = 0;
4038         pthru->cdb[2] = 0;
4039         pthru->cdb[3] = 0;
4040         pthru->cdb[4] = 255;
4041         pthru->cdb[5] = 0;
4042
4043
4044         pthru->dataxferaddr = (u32)buf_dma_handle;
4045         pthru->dataxferlen = 256;
4046
4047         memset(&mc, 0, sizeof(megacmd_t));
4048
4049         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
4050         mc.xferaddr = (u32)pthru_dma_handle;
4051
4052         rval = mega_internal_command(adapter, &mc, pthru);
4053
4054         dma_free_coherent(&pdev->dev, sizeof(mega_passthru), pthru,
4055                           pthru_dma_handle);
4056
4057         free_local_pdev(pdev);
4058
4059         return rval;
4060 }
4061 #endif
4062
4063 /**
4064  * mega_internal_command()
4065  * @adapter: pointer to our soft state
4066  * @mc: the mailbox command
4067  * @pthru: Passthru structure for DCDB commands
4068  *
4069  * Issue the internal commands in interrupt mode.
4070  * The last argument is the address of the passthru structure if the command
4071  * to be fired is a passthru command
4072  *
4073  * Note: parameter 'pthru' is null for non-passthru commands.
4074  */
4075 static int
4076 mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
4077 {
4078         unsigned long flags;
4079         scb_t   *scb;
4080         int     rval;
4081
4082         /*
4083          * The internal commands share one command id and hence are
4084          * serialized. This is so because we want to reserve maximum number of
4085          * available command ids for the I/O commands.
4086          */
4087         mutex_lock(&adapter->int_mtx);
4088
4089         scb = &adapter->int_scb;
4090         memset(scb, 0, sizeof(scb_t));
4091
4092         scb->idx = CMDID_INT_CMDS;
4093         scb->state |= SCB_ACTIVE | SCB_PENDQ;
4094
4095         memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
4096
4097         /*
4098          * Is it a passthru command
4099          */
4100         if (mc->cmd == MEGA_MBOXCMD_PASSTHRU)
4101                 scb->pthru = pthru;
4102
4103         spin_lock_irqsave(&adapter->lock, flags);
4104         list_add_tail(&scb->list, &adapter->pending_list);
4105         /*
4106          * Check if the HBA is in quiescent state, e.g., during a
4107          * delete logical drive opertion. If it is, don't run
4108          * the pending_list.
4109          */
4110         if (atomic_read(&adapter->quiescent) == 0)
4111                 mega_runpendq(adapter);
4112         spin_unlock_irqrestore(&adapter->lock, flags);
4113
4114         wait_for_completion(&adapter->int_waitq);
4115
4116         mc->status = rval = adapter->int_status;
4117
4118         /*
4119          * Print a debug message for all failed commands. Applications can use
4120          * this information.
4121          */
4122         if (rval && trace_level) {
4123                 dev_info(&adapter->dev->dev, "cmd [%x, %x, %x] status:[%x]\n",
4124                         mc->cmd, mc->opcode, mc->subopcode, rval);
4125         }
4126
4127         mutex_unlock(&adapter->int_mtx);
4128         return rval;
4129 }
4130
4131 static struct scsi_host_template megaraid_template = {
4132         .module                         = THIS_MODULE,
4133         .name                           = "MegaRAID",
4134         .proc_name                      = "megaraid_legacy",
4135         .info                           = megaraid_info,
4136         .queuecommand                   = megaraid_queue,
4137         .bios_param                     = megaraid_biosparam,
4138         .max_sectors                    = MAX_SECTORS_PER_IO,
4139         .can_queue                      = MAX_COMMANDS,
4140         .this_id                        = DEFAULT_INITIATOR_ID,
4141         .sg_tablesize                   = MAX_SGLIST,
4142         .cmd_per_lun                    = DEF_CMD_PER_LUN,
4143         .eh_abort_handler               = megaraid_abort,
4144         .eh_device_reset_handler        = megaraid_reset,
4145         .eh_bus_reset_handler           = megaraid_reset,
4146         .eh_host_reset_handler          = megaraid_reset,
4147         .no_write_same                  = 1,
4148 };
4149
4150 static int
4151 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
4152 {
4153         struct Scsi_Host *host;
4154         adapter_t *adapter;
4155         unsigned long mega_baseport, tbase, flag = 0;
4156         u16 subsysid, subsysvid;
4157         u8 pci_bus, pci_dev_func;
4158         int irq, i, j;
4159         int error = -ENODEV;
4160
4161         if (hba_count >= MAX_CONTROLLERS)
4162                 goto out;
4163
4164         if (pci_enable_device(pdev))
4165                 goto out;
4166         pci_set_master(pdev);
4167
4168         pci_bus = pdev->bus->number;
4169         pci_dev_func = pdev->devfn;
4170
4171         /*
4172          * The megaraid3 stuff reports the ID of the Intel part which is not
4173          * remotely specific to the megaraid
4174          */
4175         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
4176                 u16 magic;
4177                 /*
4178                  * Don't fall over the Compaq management cards using the same
4179                  * PCI identifier
4180                  */
4181                 if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
4182                     pdev->subsystem_device == 0xC000)
4183                         goto out_disable_device;
4184                 /* Now check the magic signature byte */
4185                 pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
4186                 if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
4187                         goto out_disable_device;
4188                 /* Ok it is probably a megaraid */
4189         }
4190
4191         /*
4192          * For these vendor and device ids, signature offsets are not
4193          * valid and 64 bit is implicit
4194          */
4195         if (id->driver_data & BOARD_64BIT)
4196                 flag |= BOARD_64BIT;
4197         else {
4198                 u32 magic64;
4199
4200                 pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
4201                 if (magic64 == HBA_SIGNATURE_64BIT)
4202                         flag |= BOARD_64BIT;
4203         }
4204
4205         subsysvid = pdev->subsystem_vendor;
4206         subsysid = pdev->subsystem_device;
4207
4208         dev_notice(&pdev->dev, "found 0x%4.04x:0x%4.04x\n",
4209                 id->vendor, id->device);
4210
4211         /* Read the base port and IRQ from PCI */
4212         mega_baseport = pci_resource_start(pdev, 0);
4213         irq = pdev->irq;
4214
4215         tbase = mega_baseport;
4216         if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
4217                 flag |= BOARD_MEMMAP;
4218
4219                 if (!request_mem_region(mega_baseport, 128, "megaraid")) {
4220                         dev_warn(&pdev->dev, "mem region busy!\n");
4221                         goto out_disable_device;
4222                 }
4223
4224                 mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
4225                 if (!mega_baseport) {
4226                         dev_warn(&pdev->dev, "could not map hba memory\n");
4227                         goto out_release_region;
4228                 }
4229         } else {
4230                 flag |= BOARD_IOMAP;
4231                 mega_baseport += 0x10;
4232
4233                 if (!request_region(mega_baseport, 16, "megaraid"))
4234                         goto out_disable_device;
4235         }
4236
4237         /* Initialize SCSI Host structure */
4238         host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
4239         if (!host)
4240                 goto out_iounmap;
4241
4242         adapter = (adapter_t *)host->hostdata;
4243         memset(adapter, 0, sizeof(adapter_t));
4244
4245         dev_notice(&pdev->dev,
4246                 "scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
4247                 host->host_no, mega_baseport, irq);
4248
4249         adapter->base = mega_baseport;
4250         if (flag & BOARD_MEMMAP)
4251                 adapter->mmio_base = (void __iomem *) mega_baseport;
4252
4253         INIT_LIST_HEAD(&adapter->free_list);
4254         INIT_LIST_HEAD(&adapter->pending_list);
4255         INIT_LIST_HEAD(&adapter->completed_list);
4256
4257         adapter->flag = flag;
4258         spin_lock_init(&adapter->lock);
4259
4260         host->cmd_per_lun = max_cmd_per_lun;
4261         host->max_sectors = max_sectors_per_io;
4262
4263         adapter->dev = pdev;
4264         adapter->host = host;
4265
4266         adapter->host->irq = irq;
4267
4268         if (flag & BOARD_MEMMAP)
4269                 adapter->host->base = tbase;
4270         else {
4271                 adapter->host->io_port = tbase;
4272                 adapter->host->n_io_port = 16;
4273         }
4274
4275         adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;
4276
4277         /*
4278          * Allocate buffer to issue internal commands.
4279          */
4280         adapter->mega_buffer = dma_alloc_coherent(&adapter->dev->dev,
4281                                                   MEGA_BUFFER_SIZE,
4282                                                   &adapter->buf_dma_handle,
4283                                                   GFP_KERNEL);
4284         if (!adapter->mega_buffer) {
4285                 dev_warn(&pdev->dev, "out of RAM\n");
4286                 goto out_host_put;
4287         }
4288
4289         adapter->scb_list = kmalloc_array(MAX_COMMANDS, sizeof(scb_t),
4290                                           GFP_KERNEL);
4291         if (!adapter->scb_list) {
4292                 dev_warn(&pdev->dev, "out of RAM\n");
4293                 goto out_free_cmd_buffer;
4294         }
4295
4296         if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
4297                                 megaraid_isr_memmapped : megaraid_isr_iomapped,
4298                                         IRQF_SHARED, "megaraid", adapter)) {
4299                 dev_warn(&pdev->dev, "Couldn't register IRQ %d!\n", irq);
4300                 goto out_free_scb_list;
4301         }
4302
4303         if (mega_setup_mailbox(adapter))
4304                 goto out_free_irq;
4305
4306         if (mega_query_adapter(adapter))
4307                 goto out_free_mbox;
4308
4309         /*
4310          * Have checks for some buggy f/w
4311          */
4312         if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
4313                 /*
4314                  * Which firmware
4315                  */
4316                 if (!strcmp(adapter->fw_version, "3.00") ||
4317                                 !strcmp(adapter->fw_version, "3.01")) {
4318
4319                         dev_warn(&pdev->dev,
4320                                 "Your card is a Dell PERC "
4321                                 "2/SC RAID controller with "
4322                                 "firmware\nmegaraid: 3.00 or 3.01.  "
4323                                 "This driver is known to have "
4324                                 "corruption issues\nmegaraid: with "
4325                                 "those firmware versions on this "
4326                                 "specific card.  In order\nmegaraid: "
4327                                 "to protect your data, please upgrade "
4328                                 "your firmware to version\nmegaraid: "
4329                                 "3.10 or later, available from the "
4330                                 "Dell Technical Support web\n"
4331                                 "megaraid: site at\nhttp://support."
4332                                 "dell.com/us/en/filelib/download/"
4333                                 "index.asp?fileid=2940\n"
4334                         );
4335                 }
4336         }
4337
4338         /*
4339          * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
4340          * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
4341          * support, since this firmware cannot handle 64 bit
4342          * addressing
4343          */
4344         if ((subsysvid == PCI_VENDOR_ID_HP) &&
4345             ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
4346                 /*
4347                  * which firmware
4348                  */
4349                 if (!strcmp(adapter->fw_version, "H01.07") ||
4350                     !strcmp(adapter->fw_version, "H01.08") ||
4351                     !strcmp(adapter->fw_version, "H01.09") ) {
4352                         dev_warn(&pdev->dev,
4353                                 "Firmware H.01.07, "
4354                                 "H.01.08, and H.01.09 on 1M/2M "
4355                                 "controllers\n"
4356                                 "do not support 64 bit "
4357                                 "addressing.\nDISABLING "
4358                                 "64 bit support.\n");
4359                         adapter->flag &= ~BOARD_64BIT;
4360                 }
4361         }
4362
4363         if (mega_is_bios_enabled(adapter))
4364                 mega_hbas[hba_count].is_bios_enabled = 1;
4365         mega_hbas[hba_count].hostdata_addr = adapter;
4366
4367         /*
4368          * Find out which channel is raid and which is scsi. This is
4369          * for ROMB support.
4370          */
4371         mega_enum_raid_scsi(adapter);
4372
4373         /*
4374          * Find out if a logical drive is set as the boot drive. If
4375          * there is one, will make that as the first logical drive.
4376          * ROMB: Do we have to boot from a physical drive. Then all
4377          * the physical drives would appear before the logical disks.
4378          * Else, all the physical drives would be exported to the mid
4379          * layer after logical drives.
4380          */
4381         mega_get_boot_drv(adapter);
4382
4383         if (adapter->boot_pdrv_enabled) {
4384                 j = adapter->product_info.nchannels;
4385                 for( i = 0; i < j; i++ )
4386                         adapter->logdrv_chan[i] = 0;
4387                 for( i = j; i < NVIRT_CHAN + j; i++ )
4388                         adapter->logdrv_chan[i] = 1;
4389         } else {
4390                 for (i = 0; i < NVIRT_CHAN; i++)
4391                         adapter->logdrv_chan[i] = 1;
4392                 for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
4393                         adapter->logdrv_chan[i] = 0;
4394                 adapter->mega_ch_class <<= NVIRT_CHAN;
4395         }
4396
4397         /*
4398          * Do we support random deletion and addition of logical
4399          * drives
4400          */
4401         adapter->read_ldidmap = 0;      /* set it after first logdrv
4402                                                    delete cmd */
4403         adapter->support_random_del = mega_support_random_del(adapter);
4404
4405         /* Initialize SCBs */
4406         if (mega_init_scb(adapter))
4407                 goto out_free_mbox;
4408
4409         /*
4410          * Reset the pending commands counter
4411          */
4412         atomic_set(&adapter->pend_cmds, 0);
4413
4414         /*
4415          * Reset the adapter quiescent flag
4416          */
4417         atomic_set(&adapter->quiescent, 0);
4418
4419         hba_soft_state[hba_count] = adapter;
4420
4421         /*
4422          * Fill in the structure which needs to be passed back to the
4423          * application when it does an ioctl() for controller related
4424          * information.
4425          */
4426         i = hba_count;
4427
4428         mcontroller[i].base = mega_baseport;
4429         mcontroller[i].irq = irq;
4430         mcontroller[i].numldrv = adapter->numldrv;
4431         mcontroller[i].pcibus = pci_bus;
4432         mcontroller[i].pcidev = id->device;
4433         mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
4434         mcontroller[i].pciid = -1;
4435         mcontroller[i].pcivendor = id->vendor;
4436         mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
4437         mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;
4438
4439
4440         /* Set the Mode of addressing to 64 bit if we can */
4441         if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
4442                 dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
4443                 adapter->has_64bit_addr = 1;
4444         } else  {
4445                 dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
4446                 adapter->has_64bit_addr = 0;
4447         }
4448
4449         mutex_init(&adapter->int_mtx);
4450         init_completion(&adapter->int_waitq);
4451
4452         adapter->this_id = DEFAULT_INITIATOR_ID;
4453         adapter->host->this_id = DEFAULT_INITIATOR_ID;
4454
4455 #if MEGA_HAVE_CLUSTERING
4456         /*
4457          * Is cluster support enabled on this controller
4458          * Note: In a cluster the HBAs ( the initiators ) will have
4459          * different target IDs and we cannot assume it to be 7. Call
4460          * to mega_support_cluster() will get the target ids also if
4461          * the cluster support is available
4462          */
4463         adapter->has_cluster = mega_support_cluster(adapter);
4464         if (adapter->has_cluster) {
4465                 dev_notice(&pdev->dev,
4466                         "Cluster driver, initiator id:%d\n",
4467                         adapter->this_id);
4468         }
4469 #endif
4470
4471         pci_set_drvdata(pdev, host);
4472
4473         mega_create_proc_entry(hba_count, mega_proc_dir_entry);
4474
4475         error = scsi_add_host(host, &pdev->dev);
4476         if (error)
4477                 goto out_free_mbox;
4478
4479         scsi_scan_host(host);
4480         hba_count++;
4481         return 0;
4482
4483  out_free_mbox:
4484         dma_free_coherent(&adapter->dev->dev, sizeof(mbox64_t),
4485                           adapter->una_mbox64, adapter->una_mbox64_dma);
4486  out_free_irq:
4487         free_irq(adapter->host->irq, adapter);
4488  out_free_scb_list:
4489         kfree(adapter->scb_list);
4490  out_free_cmd_buffer:
4491         dma_free_coherent(&adapter->dev->dev, MEGA_BUFFER_SIZE,
4492                           adapter->mega_buffer, adapter->buf_dma_handle);
4493  out_host_put:
4494         scsi_host_put(host);
4495  out_iounmap:
4496         if (flag & BOARD_MEMMAP)
4497                 iounmap((void *)mega_baseport);
4498  out_release_region:
4499         if (flag & BOARD_MEMMAP)
4500                 release_mem_region(tbase, 128);
4501         else
4502                 release_region(mega_baseport, 16);
4503  out_disable_device:
4504         pci_disable_device(pdev);
4505  out:
4506         return error;
4507 }
4508
4509 static void
4510 __megaraid_shutdown(adapter_t *adapter)
4511 {
4512         u_char  raw_mbox[sizeof(struct mbox_out)];
4513         mbox_t  *mbox = (mbox_t *)raw_mbox;
4514         int     i;
4515
4516         /* Flush adapter cache */
4517         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4518         raw_mbox[0] = FLUSH_ADAPTER;
4519
4520         free_irq(adapter->host->irq, adapter);
4521
4522         /* Issue a blocking (interrupts disabled) command to the card */
4523         issue_scb_block(adapter, raw_mbox);
4524
4525         /* Flush disks cache */
4526         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4527         raw_mbox[0] = FLUSH_SYSTEM;
4528
4529         /* Issue a blocking (interrupts disabled) command to the card */
4530         issue_scb_block(adapter, raw_mbox);
4531
4532         if (atomic_read(&adapter->pend_cmds) > 0)
4533                 dev_warn(&adapter->dev->dev, "pending commands!!\n");
4534
4535         /*
4536          * Have a delibrate delay to make sure all the caches are
4537          * actually flushed.
4538          */
4539         for (i = 0; i <= 10; i++)
4540                 mdelay(1000);
4541 }
4542
4543 static void
4544 megaraid_remove_one(struct pci_dev *pdev)
4545 {
4546         struct Scsi_Host *host = pci_get_drvdata(pdev);
4547         adapter_t *adapter = (adapter_t *)host->hostdata;
4548         char buf[12] = { 0 };
4549
4550         scsi_remove_host(host);
4551
4552         __megaraid_shutdown(adapter);
4553
4554         /* Free our resources */
4555         if (adapter->flag & BOARD_MEMMAP) {
4556                 iounmap((void *)adapter->base);
4557                 release_mem_region(adapter->host->base, 128);
4558         } else
4559                 release_region(adapter->base, 16);
4560
4561         mega_free_sgl(adapter);
4562
4563         sprintf(buf, "hba%d", adapter->host->host_no);
4564         remove_proc_subtree(buf, mega_proc_dir_entry);
4565
4566         dma_free_coherent(&adapter->dev->dev, MEGA_BUFFER_SIZE,
4567                           adapter->mega_buffer, adapter->buf_dma_handle);
4568         kfree(adapter->scb_list);
4569         dma_free_coherent(&adapter->dev->dev, sizeof(mbox64_t),
4570                           adapter->una_mbox64, adapter->una_mbox64_dma);
4571
4572         scsi_host_put(host);
4573         pci_disable_device(pdev);
4574
4575         hba_count--;
4576 }
4577
4578 static void
4579 megaraid_shutdown(struct pci_dev *pdev)
4580 {
4581         struct Scsi_Host *host = pci_get_drvdata(pdev);
4582         adapter_t *adapter = (adapter_t *)host->hostdata;
4583
4584         __megaraid_shutdown(adapter);
4585 }
4586
4587 static struct pci_device_id megaraid_pci_tbl[] = {
4588         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID,
4589                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4590         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2,
4591                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4592         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3,
4593                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4594         {0,}
4595 };
4596 MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl);
4597
4598 static struct pci_driver megaraid_pci_driver = {
4599         .name           = "megaraid_legacy",
4600         .id_table       = megaraid_pci_tbl,
4601         .probe          = megaraid_probe_one,
4602         .remove         = megaraid_remove_one,
4603         .shutdown       = megaraid_shutdown,
4604 };
4605
4606 static int __init megaraid_init(void)
4607 {
4608         int error;
4609
4610         if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN))
4611                 max_cmd_per_lun = MAX_CMD_PER_LUN;
4612         if (max_mbox_busy_wait > MBOX_BUSY_WAIT)
4613                 max_mbox_busy_wait = MBOX_BUSY_WAIT;
4614
4615 #ifdef CONFIG_PROC_FS
4616         mega_proc_dir_entry = proc_mkdir("megaraid", NULL);
4617         if (!mega_proc_dir_entry) {
4618                 printk(KERN_WARNING
4619                                 "megaraid: failed to create megaraid root\n");
4620         }
4621 #endif
4622         error = pci_register_driver(&megaraid_pci_driver);
4623         if (error) {
4624 #ifdef CONFIG_PROC_FS
4625                 remove_proc_entry("megaraid", NULL);
4626 #endif
4627                 return error;
4628         }
4629
4630         /*
4631          * Register the driver as a character device, for applications
4632          * to access it for ioctls.
4633          * First argument (major) to register_chrdev implies a dynamic
4634          * major number allocation.
4635          */
4636         major = register_chrdev(0, "megadev_legacy", &megadev_fops);
4637         if (!major) {
4638                 printk(KERN_WARNING
4639                                 "megaraid: failed to register char device\n");
4640         }
4641
4642         return 0;
4643 }
4644
4645 static void __exit megaraid_exit(void)
4646 {
4647         /*
4648          * Unregister the character device interface to the driver.
4649          */
4650         unregister_chrdev(major, "megadev_legacy");
4651
4652         pci_unregister_driver(&megaraid_pci_driver);
4653
4654 #ifdef CONFIG_PROC_FS
4655         remove_proc_entry("megaraid", NULL);
4656 #endif
4657 }
4658
4659 module_init(megaraid_init);
4660 module_exit(megaraid_exit);
4661
4662 /* vi: set ts=8 sw=8 tw=78: */