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                                         scsi_build_sense(cmd, 0,
1601                                                          ABORTED_COMMAND, 0, 0);
1602                         }
1603                         break;
1604
1605                 case 0x08:      /* ERR_DEST_DRIVE_FAILED, i.e.
1606                                    SCSI_STATUS_BUSY */
1607                         cmd->result |= (DID_BUS_BUSY << 16) | status;
1608                         break;
1609
1610                 default:
1611 #if MEGA_HAVE_CLUSTERING
1612                         /*
1613                          * If TEST_UNIT_READY fails, we know
1614                          * MEGA_RESERVATION_STATUS failed
1615                          */
1616                         if( cmd->cmnd[0] == TEST_UNIT_READY ) {
1617                                 cmd->result |= (DID_ERROR << 16) |
1618                                         (RESERVATION_CONFLICT << 1);
1619                         }
1620                         else
1621                         /*
1622                          * Error code returned is 1 if Reserve or Release
1623                          * failed or the input parameter is invalid
1624                          */
1625                         if( status == 1 &&
1626                                 (cmd->cmnd[0] == RESERVE ||
1627                                          cmd->cmnd[0] == RELEASE) ) {
1628
1629                                 cmd->result |= (DID_ERROR << 16) |
1630                                         (RESERVATION_CONFLICT << 1);
1631                         }
1632                         else
1633 #endif
1634                                 cmd->result |= (DID_BAD_TARGET << 16)|status;
1635                 }
1636
1637                 mega_free_scb(adapter, scb);
1638
1639                 /* Add Scsi_Command to end of completed queue */
1640                 list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
1641         }
1642 }
1643
1644
1645 /*
1646  * mega_runpendq()
1647  *
1648  * Run through the list of completed requests and finish it
1649  */
1650 static void
1651 mega_rundoneq (adapter_t *adapter)
1652 {
1653         struct scsi_cmnd *cmd;
1654         struct list_head *pos;
1655
1656         list_for_each(pos, &adapter->completed_list) {
1657
1658                 struct scsi_pointer* spos = (struct scsi_pointer *)pos;
1659
1660                 cmd = list_entry(spos, struct scsi_cmnd, SCp);
1661                 cmd->scsi_done(cmd);
1662         }
1663
1664         INIT_LIST_HEAD(&adapter->completed_list);
1665 }
1666
1667
1668 /*
1669  * Free a SCB structure
1670  * Note: We assume the scsi commands associated with this scb is not free yet.
1671  */
1672 static void
1673 mega_free_scb(adapter_t *adapter, scb_t *scb)
1674 {
1675         switch( scb->dma_type ) {
1676
1677         case MEGA_DMA_TYPE_NONE:
1678                 break;
1679
1680         case MEGA_SGLIST:
1681                 scsi_dma_unmap(scb->cmd);
1682                 break;
1683         default:
1684                 break;
1685         }
1686
1687         /*
1688          * Remove from the pending list
1689          */
1690         list_del_init(&scb->list);
1691
1692         /* Link the scb back into free list */
1693         scb->state = SCB_FREE;
1694         scb->cmd = NULL;
1695
1696         list_add(&scb->list, &adapter->free_list);
1697 }
1698
1699
1700 static int
1701 __mega_busywait_mbox (adapter_t *adapter)
1702 {
1703         volatile mbox_t *mbox = adapter->mbox;
1704         long counter;
1705
1706         for (counter = 0; counter < 10000; counter++) {
1707                 if (!mbox->m_in.busy)
1708                         return 0;
1709                 udelay(100);
1710                 cond_resched();
1711         }
1712         return -1;              /* give up after 1 second */
1713 }
1714
1715 /*
1716  * Copies data to SGLIST
1717  * Note: For 64 bit cards, we need a minimum of one SG element for read/write
1718  */
1719 static int
1720 mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
1721 {
1722         struct scatterlist *sg;
1723         struct scsi_cmnd        *cmd;
1724         int     sgcnt;
1725         int     idx;
1726
1727         cmd = scb->cmd;
1728
1729         /*
1730          * Copy Scatter-Gather list info into controller structure.
1731          *
1732          * The number of sg elements returned must not exceed our limit
1733          */
1734         sgcnt = scsi_dma_map(cmd);
1735
1736         scb->dma_type = MEGA_SGLIST;
1737
1738         BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);
1739
1740         *len = 0;
1741
1742         if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
1743                 sg = scsi_sglist(cmd);
1744                 scb->dma_h_bulkdata = sg_dma_address(sg);
1745                 *buf = (u32)scb->dma_h_bulkdata;
1746                 *len = sg_dma_len(sg);
1747                 return 0;
1748         }
1749
1750         scsi_for_each_sg(cmd, sg, sgcnt, idx) {
1751                 if (adapter->has_64bit_addr) {
1752                         scb->sgl64[idx].address = sg_dma_address(sg);
1753                         *len += scb->sgl64[idx].length = sg_dma_len(sg);
1754                 } else {
1755                         scb->sgl[idx].address = sg_dma_address(sg);
1756                         *len += scb->sgl[idx].length = sg_dma_len(sg);
1757                 }
1758         }
1759
1760         /* Reset pointer and length fields */
1761         *buf = scb->sgl_dma_addr;
1762
1763         /* Return count of SG requests */
1764         return sgcnt;
1765 }
1766
1767
1768 /*
1769  * mega_8_to_40ld()
1770  *
1771  * takes all info in AdapterInquiry structure and puts it into ProductInfo and
1772  * Enquiry3 structures for later use
1773  */
1774 static void
1775 mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
1776                 mega_product_info *product_info)
1777 {
1778         int i;
1779
1780         product_info->max_commands = inquiry->adapter_info.max_commands;
1781         enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
1782         product_info->nchannels = inquiry->adapter_info.nchannels;
1783
1784         for (i = 0; i < 4; i++) {
1785                 product_info->fw_version[i] =
1786                         inquiry->adapter_info.fw_version[i];
1787
1788                 product_info->bios_version[i] =
1789                         inquiry->adapter_info.bios_version[i];
1790         }
1791         enquiry3->cache_flush_interval =
1792                 inquiry->adapter_info.cache_flush_interval;
1793
1794         product_info->dram_size = inquiry->adapter_info.dram_size;
1795
1796         enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
1797
1798         for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
1799                 enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
1800                 enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
1801                 enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
1802         }
1803
1804         for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
1805                 enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
1806 }
1807
1808 static inline void
1809 mega_free_sgl(adapter_t *adapter)
1810 {
1811         scb_t   *scb;
1812         int     i;
1813
1814         for(i = 0; i < adapter->max_cmds; i++) {
1815
1816                 scb = &adapter->scb_list[i];
1817
1818                 if( scb->sgl64 ) {
1819                         dma_free_coherent(&adapter->dev->dev,
1820                                           sizeof(mega_sgl64) * adapter->sglen,
1821                                           scb->sgl64, scb->sgl_dma_addr);
1822
1823                         scb->sgl64 = NULL;
1824                 }
1825
1826                 if( scb->pthru ) {
1827                         dma_free_coherent(&adapter->dev->dev,
1828                                           sizeof(mega_passthru), scb->pthru,
1829                                           scb->pthru_dma_addr);
1830
1831                         scb->pthru = NULL;
1832                 }
1833
1834                 if( scb->epthru ) {
1835                         dma_free_coherent(&adapter->dev->dev,
1836                                           sizeof(mega_ext_passthru),
1837                                           scb->epthru, scb->epthru_dma_addr);
1838
1839                         scb->epthru = NULL;
1840                 }
1841
1842         }
1843 }
1844
1845
1846 /*
1847  * Get information about the card/driver
1848  */
1849 const char *
1850 megaraid_info(struct Scsi_Host *host)
1851 {
1852         static char buffer[512];
1853         adapter_t *adapter;
1854
1855         adapter = (adapter_t *)host->hostdata;
1856
1857         sprintf (buffer,
1858                  "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
1859                  adapter->fw_version, adapter->product_info.max_commands,
1860                  adapter->host->max_id, adapter->host->max_channel,
1861                  (u32)adapter->host->max_lun);
1862         return buffer;
1863 }
1864
1865 /*
1866  * Abort a previous SCSI request. Only commands on the pending list can be
1867  * aborted. All the commands issued to the F/W must complete.
1868  */
1869 static int
1870 megaraid_abort(struct scsi_cmnd *cmd)
1871 {
1872         adapter_t       *adapter;
1873         int             rval;
1874
1875         adapter = (adapter_t *)cmd->device->host->hostdata;
1876
1877         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
1878
1879         /*
1880          * This is required here to complete any completed requests
1881          * to be communicated over to the mid layer.
1882          */
1883         mega_rundoneq(adapter);
1884
1885         return rval;
1886 }
1887
1888
1889 static int
1890 megaraid_reset(struct scsi_cmnd *cmd)
1891 {
1892         adapter_t       *adapter;
1893         megacmd_t       mc;
1894         int             rval;
1895
1896         adapter = (adapter_t *)cmd->device->host->hostdata;
1897
1898 #if MEGA_HAVE_CLUSTERING
1899         mc.cmd = MEGA_CLUSTER_CMD;
1900         mc.opcode = MEGA_RESET_RESERVATIONS;
1901
1902         if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
1903                 dev_warn(&adapter->dev->dev, "reservation reset failed\n");
1904         }
1905         else {
1906                 dev_info(&adapter->dev->dev, "reservation reset\n");
1907         }
1908 #endif
1909
1910         spin_lock_irq(&adapter->lock);
1911
1912         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
1913
1914         /*
1915          * This is required here to complete any completed requests
1916          * to be communicated over to the mid layer.
1917          */
1918         mega_rundoneq(adapter);
1919         spin_unlock_irq(&adapter->lock);
1920
1921         return rval;
1922 }
1923
1924 /**
1925  * megaraid_abort_and_reset()
1926  * @adapter: megaraid soft state
1927  * @cmd: scsi command to be aborted or reset
1928  * @aor: abort or reset flag
1929  *
1930  * Try to locate the scsi command in the pending queue. If found and is not
1931  * issued to the controller, abort/reset it. Otherwise return failure
1932  */
1933 static int
1934 megaraid_abort_and_reset(adapter_t *adapter, struct scsi_cmnd *cmd, int aor)
1935 {
1936         struct list_head        *pos, *next;
1937         scb_t                   *scb;
1938
1939         dev_warn(&adapter->dev->dev, "%s cmd=%x <c=%d t=%d l=%d>\n",
1940              (aor == SCB_ABORT)? "ABORTING":"RESET",
1941              cmd->cmnd[0], cmd->device->channel,
1942              cmd->device->id, (u32)cmd->device->lun);
1943
1944         if(list_empty(&adapter->pending_list))
1945                 return FAILED;
1946
1947         list_for_each_safe(pos, next, &adapter->pending_list) {
1948
1949                 scb = list_entry(pos, scb_t, list);
1950
1951                 if (scb->cmd == cmd) { /* Found command */
1952
1953                         scb->state |= aor;
1954
1955                         /*
1956                          * Check if this command has firmware ownership. If
1957                          * yes, we cannot reset this command. Whenever f/w
1958                          * completes this command, we will return appropriate
1959                          * status from ISR.
1960                          */
1961                         if( scb->state & SCB_ISSUED ) {
1962
1963                                 dev_warn(&adapter->dev->dev,
1964                                         "%s[%x], fw owner\n",
1965                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1966                                         scb->idx);
1967
1968                                 return FAILED;
1969                         }
1970                         else {
1971
1972                                 /*
1973                                  * Not yet issued! Remove from the pending
1974                                  * list
1975                                  */
1976                                 dev_warn(&adapter->dev->dev,
1977                                         "%s-[%x], driver owner\n",
1978                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1979                                         scb->idx);
1980
1981                                 mega_free_scb(adapter, scb);
1982
1983                                 if( aor == SCB_ABORT ) {
1984                                         cmd->result = (DID_ABORT << 16);
1985                                 }
1986                                 else {
1987                                         cmd->result = (DID_RESET << 16);
1988                                 }
1989
1990                                 list_add_tail(SCSI_LIST(cmd),
1991                                                 &adapter->completed_list);
1992
1993                                 return SUCCESS;
1994                         }
1995                 }
1996         }
1997
1998         return FAILED;
1999 }
2000
2001 static inline int
2002 make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
2003 {
2004         *pdev = pci_alloc_dev(NULL);
2005
2006         if( *pdev == NULL ) return -1;
2007
2008         memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
2009
2010         if (dma_set_mask(&(*pdev)->dev, DMA_BIT_MASK(32)) != 0) {
2011                 kfree(*pdev);
2012                 return -1;
2013         }
2014
2015         return 0;
2016 }
2017
2018 static inline void
2019 free_local_pdev(struct pci_dev *pdev)
2020 {
2021         kfree(pdev);
2022 }
2023
2024 /**
2025  * mega_allocate_inquiry()
2026  * @dma_handle: handle returned for dma address
2027  * @pdev: handle to pci device
2028  *
2029  * allocates memory for inquiry structure
2030  */
2031 static inline void *
2032 mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
2033 {
2034         return dma_alloc_coherent(&pdev->dev, sizeof(mega_inquiry3),
2035                                   dma_handle, GFP_KERNEL);
2036 }
2037
2038
2039 static inline void
2040 mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
2041 {
2042         dma_free_coherent(&pdev->dev, sizeof(mega_inquiry3), inquiry,
2043                           dma_handle);
2044 }
2045
2046
2047 #ifdef CONFIG_PROC_FS
2048 /* Following code handles /proc fs  */
2049
2050 /**
2051  * proc_show_config()
2052  * @m: Synthetic file construction data
2053  * @v: File iterator
2054  *
2055  * Display configuration information about the controller.
2056  */
2057 static int
2058 proc_show_config(struct seq_file *m, void *v)
2059 {
2060
2061         adapter_t *adapter = m->private;
2062
2063         seq_puts(m, MEGARAID_VERSION);
2064         if(adapter->product_info.product_name[0])
2065                 seq_printf(m, "%s\n", adapter->product_info.product_name);
2066
2067         seq_puts(m, "Controller Type: ");
2068
2069         if( adapter->flag & BOARD_MEMMAP )
2070                 seq_puts(m, "438/466/467/471/493/518/520/531/532\n");
2071         else
2072                 seq_puts(m, "418/428/434\n");
2073
2074         if(adapter->flag & BOARD_40LD)
2075                 seq_puts(m, "Controller Supports 40 Logical Drives\n");
2076
2077         if(adapter->flag & BOARD_64BIT)
2078                 seq_puts(m, "Controller capable of 64-bit memory addressing\n");
2079         if( adapter->has_64bit_addr )
2080                 seq_puts(m, "Controller using 64-bit memory addressing\n");
2081         else
2082                 seq_puts(m, "Controller is not using 64-bit memory addressing\n");
2083
2084         seq_printf(m, "Base = %08lx, Irq = %d, ",
2085                    adapter->base, adapter->host->irq);
2086
2087         seq_printf(m, "Logical Drives = %d, Channels = %d\n",
2088                    adapter->numldrv, adapter->product_info.nchannels);
2089
2090         seq_printf(m, "Version =%s:%s, DRAM = %dMb\n",
2091                    adapter->fw_version, adapter->bios_version,
2092                    adapter->product_info.dram_size);
2093
2094         seq_printf(m, "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
2095                    adapter->product_info.max_commands, adapter->max_cmds);
2096
2097         seq_printf(m, "support_ext_cdb    = %d\n", adapter->support_ext_cdb);
2098         seq_printf(m, "support_random_del = %d\n", adapter->support_random_del);
2099         seq_printf(m, "boot_ldrv_enabled  = %d\n", adapter->boot_ldrv_enabled);
2100         seq_printf(m, "boot_ldrv          = %d\n", adapter->boot_ldrv);
2101         seq_printf(m, "boot_pdrv_enabled  = %d\n", adapter->boot_pdrv_enabled);
2102         seq_printf(m, "boot_pdrv_ch       = %d\n", adapter->boot_pdrv_ch);
2103         seq_printf(m, "boot_pdrv_tgt      = %d\n", adapter->boot_pdrv_tgt);
2104         seq_printf(m, "quiescent          = %d\n",
2105                    atomic_read(&adapter->quiescent));
2106         seq_printf(m, "has_cluster        = %d\n", adapter->has_cluster);
2107
2108         seq_puts(m, "\nModule Parameters:\n");
2109         seq_printf(m, "max_cmd_per_lun    = %d\n", max_cmd_per_lun);
2110         seq_printf(m, "max_sectors_per_io = %d\n", max_sectors_per_io);
2111         return 0;
2112 }
2113
2114 /**
2115  * proc_show_stat()
2116  * @m: Synthetic file construction data
2117  * @v: File iterator
2118  *
2119  * Display statistical information about the I/O activity.
2120  */
2121 static int
2122 proc_show_stat(struct seq_file *m, void *v)
2123 {
2124         adapter_t *adapter = m->private;
2125 #if MEGA_HAVE_STATS
2126         int     i;
2127 #endif
2128
2129         seq_puts(m, "Statistical Information for this controller\n");
2130         seq_printf(m, "pend_cmds = %d\n", atomic_read(&adapter->pend_cmds));
2131 #if MEGA_HAVE_STATS
2132         for(i = 0; i < adapter->numldrv; i++) {
2133                 seq_printf(m, "Logical Drive %d:\n", i);
2134                 seq_printf(m, "\tReads Issued = %lu, Writes Issued = %lu\n",
2135                            adapter->nreads[i], adapter->nwrites[i]);
2136                 seq_printf(m, "\tSectors Read = %lu, Sectors Written = %lu\n",
2137                            adapter->nreadblocks[i], adapter->nwriteblocks[i]);
2138                 seq_printf(m, "\tRead errors = %lu, Write errors = %lu\n\n",
2139                            adapter->rd_errors[i], adapter->wr_errors[i]);
2140         }
2141 #else
2142         seq_puts(m, "IO and error counters not compiled in driver.\n");
2143 #endif
2144         return 0;
2145 }
2146
2147
2148 /**
2149  * proc_show_mbox()
2150  * @m: Synthetic file construction data
2151  * @v: File iterator
2152  *
2153  * Display mailbox information for the last command issued. This information
2154  * is good for debugging.
2155  */
2156 static int
2157 proc_show_mbox(struct seq_file *m, void *v)
2158 {
2159         adapter_t       *adapter = m->private;
2160         volatile mbox_t *mbox = adapter->mbox;
2161
2162         seq_puts(m, "Contents of Mail Box Structure\n");
2163         seq_printf(m, "  Fw Command   = 0x%02x\n", mbox->m_out.cmd);
2164         seq_printf(m, "  Cmd Sequence = 0x%02x\n", mbox->m_out.cmdid);
2165         seq_printf(m, "  No of Sectors= %04d\n", mbox->m_out.numsectors);
2166         seq_printf(m, "  LBA          = 0x%02x\n", mbox->m_out.lba);
2167         seq_printf(m, "  DTA          = 0x%08x\n", mbox->m_out.xferaddr);
2168         seq_printf(m, "  Logical Drive= 0x%02x\n", mbox->m_out.logdrv);
2169         seq_printf(m, "  No of SG Elmt= 0x%02x\n", mbox->m_out.numsgelements);
2170         seq_printf(m, "  Busy         = %01x\n", mbox->m_in.busy);
2171         seq_printf(m, "  Status       = 0x%02x\n", mbox->m_in.status);
2172         return 0;
2173 }
2174
2175
2176 /**
2177  * proc_show_rebuild_rate()
2178  * @m: Synthetic file construction data
2179  * @v: File iterator
2180  *
2181  * Display current rebuild rate
2182  */
2183 static int
2184 proc_show_rebuild_rate(struct seq_file *m, void *v)
2185 {
2186         adapter_t       *adapter = m->private;
2187         dma_addr_t      dma_handle;
2188         caddr_t         inquiry;
2189         struct pci_dev  *pdev;
2190
2191         if( make_local_pdev(adapter, &pdev) != 0 )
2192                 return 0;
2193
2194         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2195                 goto free_pdev;
2196
2197         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2198                 seq_puts(m, "Adapter inquiry failed.\n");
2199                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2200                 goto free_inquiry;
2201         }
2202
2203         if( adapter->flag & BOARD_40LD )
2204                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2205                            ((mega_inquiry3 *)inquiry)->rebuild_rate);
2206         else
2207                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2208                         ((mraid_ext_inquiry *)
2209                          inquiry)->raid_inq.adapter_info.rebuild_rate);
2210
2211 free_inquiry:
2212         mega_free_inquiry(inquiry, dma_handle, pdev);
2213 free_pdev:
2214         free_local_pdev(pdev);
2215         return 0;
2216 }
2217
2218
2219 /**
2220  * proc_show_battery()
2221  * @m: Synthetic file construction data
2222  * @v: File iterator
2223  *
2224  * Display information about the battery module on the controller.
2225  */
2226 static int
2227 proc_show_battery(struct seq_file *m, void *v)
2228 {
2229         adapter_t       *adapter = m->private;
2230         dma_addr_t      dma_handle;
2231         caddr_t         inquiry;
2232         struct pci_dev  *pdev;
2233         u8      battery_status;
2234
2235         if( make_local_pdev(adapter, &pdev) != 0 )
2236                 return 0;
2237
2238         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2239                 goto free_pdev;
2240
2241         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2242                 seq_puts(m, "Adapter inquiry failed.\n");
2243                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2244                 goto free_inquiry;
2245         }
2246
2247         if( adapter->flag & BOARD_40LD ) {
2248                 battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
2249         }
2250         else {
2251                 battery_status = ((mraid_ext_inquiry *)inquiry)->
2252                         raid_inq.adapter_info.battery_status;
2253         }
2254
2255         /*
2256          * Decode the battery status
2257          */
2258         seq_printf(m, "Battery Status:[%d]", battery_status);
2259
2260         if(battery_status == MEGA_BATT_CHARGE_DONE)
2261                 seq_puts(m, " Charge Done");
2262
2263         if(battery_status & MEGA_BATT_MODULE_MISSING)
2264                 seq_puts(m, " Module Missing");
2265
2266         if(battery_status & MEGA_BATT_LOW_VOLTAGE)
2267                 seq_puts(m, " Low Voltage");
2268
2269         if(battery_status & MEGA_BATT_TEMP_HIGH)
2270                 seq_puts(m, " Temperature High");
2271
2272         if(battery_status & MEGA_BATT_PACK_MISSING)
2273                 seq_puts(m, " Pack Missing");
2274
2275         if(battery_status & MEGA_BATT_CHARGE_INPROG)
2276                 seq_puts(m, " Charge In-progress");
2277
2278         if(battery_status & MEGA_BATT_CHARGE_FAIL)
2279                 seq_puts(m, " Charge Fail");
2280
2281         if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
2282                 seq_puts(m, " Cycles Exceeded");
2283
2284         seq_putc(m, '\n');
2285
2286 free_inquiry:
2287         mega_free_inquiry(inquiry, dma_handle, pdev);
2288 free_pdev:
2289         free_local_pdev(pdev);
2290         return 0;
2291 }
2292
2293
2294 /*
2295  * Display scsi inquiry
2296  */
2297 static void
2298 mega_print_inquiry(struct seq_file *m, char *scsi_inq)
2299 {
2300         int     i;
2301
2302         seq_puts(m, "  Vendor: ");
2303         seq_write(m, scsi_inq + 8, 8);
2304         seq_puts(m, "  Model: ");
2305         seq_write(m, scsi_inq + 16, 16);
2306         seq_puts(m, "  Rev: ");
2307         seq_write(m, scsi_inq + 32, 4);
2308         seq_putc(m, '\n');
2309
2310         i = scsi_inq[0] & 0x1f;
2311         seq_printf(m, "  Type:   %s ", scsi_device_type(i));
2312
2313         seq_printf(m, "                 ANSI SCSI revision: %02x",
2314                    scsi_inq[2] & 0x07);
2315
2316         if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
2317                 seq_puts(m, " CCS\n");
2318         else
2319                 seq_putc(m, '\n');
2320 }
2321
2322 /**
2323  * proc_show_pdrv()
2324  * @m: Synthetic file construction data
2325  * @adapter: pointer to our soft state
2326  * @channel: channel
2327  *
2328  * Display information about the physical drives.
2329  */
2330 static int
2331 proc_show_pdrv(struct seq_file *m, adapter_t *adapter, int channel)
2332 {
2333         dma_addr_t      dma_handle;
2334         char            *scsi_inq;
2335         dma_addr_t      scsi_inq_dma_handle;
2336         caddr_t         inquiry;
2337         struct pci_dev  *pdev;
2338         u8      *pdrv_state;
2339         u8      state;
2340         int     tgt;
2341         int     max_channels;
2342         int     i;
2343
2344         if( make_local_pdev(adapter, &pdev) != 0 )
2345                 return 0;
2346
2347         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2348                 goto free_pdev;
2349
2350         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2351                 seq_puts(m, "Adapter inquiry failed.\n");
2352                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2353                 goto free_inquiry;
2354         }
2355
2356
2357         scsi_inq = dma_alloc_coherent(&pdev->dev, 256, &scsi_inq_dma_handle,
2358                                       GFP_KERNEL);
2359         if( scsi_inq == NULL ) {
2360                 seq_puts(m, "memory not available for scsi inq.\n");
2361                 goto free_inquiry;
2362         }
2363
2364         if( adapter->flag & BOARD_40LD ) {
2365                 pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
2366         }
2367         else {
2368                 pdrv_state = ((mraid_ext_inquiry *)inquiry)->
2369                         raid_inq.pdrv_info.pdrv_state;
2370         }
2371
2372         max_channels = adapter->product_info.nchannels;
2373
2374         if( channel >= max_channels ) {
2375                 goto free_pci;
2376         }
2377
2378         for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
2379
2380                 i = channel*16 + tgt;
2381
2382                 state = *(pdrv_state + i);
2383                 switch( state & 0x0F ) {
2384                 case PDRV_ONLINE:
2385                         seq_printf(m, "Channel:%2d Id:%2d State: Online",
2386                                    channel, tgt);
2387                         break;
2388
2389                 case PDRV_FAILED:
2390                         seq_printf(m, "Channel:%2d Id:%2d State: Failed",
2391                                    channel, tgt);
2392                         break;
2393
2394                 case PDRV_RBLD:
2395                         seq_printf(m, "Channel:%2d Id:%2d State: Rebuild",
2396                                    channel, tgt);
2397                         break;
2398
2399                 case PDRV_HOTSPARE:
2400                         seq_printf(m, "Channel:%2d Id:%2d State: Hot spare",
2401                                    channel, tgt);
2402                         break;
2403
2404                 default:
2405                         seq_printf(m, "Channel:%2d Id:%2d State: Un-configured",
2406                                    channel, tgt);
2407                         break;
2408                 }
2409
2410                 /*
2411                  * This interface displays inquiries for disk drives
2412                  * only. Inquries for logical drives and non-disk
2413                  * devices are available through /proc/scsi/scsi
2414                  */
2415                 memset(scsi_inq, 0, 256);
2416                 if( mega_internal_dev_inquiry(adapter, channel, tgt,
2417                                 scsi_inq_dma_handle) ||
2418                                 (scsi_inq[0] & 0x1F) != TYPE_DISK ) {
2419                         continue;
2420                 }
2421
2422                 /*
2423                  * Check for overflow. We print less than 240
2424                  * characters for inquiry
2425                  */
2426                 seq_puts(m, ".\n");
2427                 mega_print_inquiry(m, scsi_inq);
2428         }
2429
2430 free_pci:
2431         dma_free_coherent(&pdev->dev, 256, scsi_inq, scsi_inq_dma_handle);
2432 free_inquiry:
2433         mega_free_inquiry(inquiry, dma_handle, pdev);
2434 free_pdev:
2435         free_local_pdev(pdev);
2436         return 0;
2437 }
2438
2439 /**
2440  * proc_show_pdrv_ch0()
2441  * @m: Synthetic file construction data
2442  * @v: File iterator
2443  *
2444  * Display information about the physical drives on physical channel 0.
2445  */
2446 static int
2447 proc_show_pdrv_ch0(struct seq_file *m, void *v)
2448 {
2449         return proc_show_pdrv(m, m->private, 0);
2450 }
2451
2452
2453 /**
2454  * proc_show_pdrv_ch1()
2455  * @m: Synthetic file construction data
2456  * @v: File iterator
2457  *
2458  * Display information about the physical drives on physical channel 1.
2459  */
2460 static int
2461 proc_show_pdrv_ch1(struct seq_file *m, void *v)
2462 {
2463         return proc_show_pdrv(m, m->private, 1);
2464 }
2465
2466
2467 /**
2468  * proc_show_pdrv_ch2()
2469  * @m: Synthetic file construction data
2470  * @v: File iterator
2471  *
2472  * Display information about the physical drives on physical channel 2.
2473  */
2474 static int
2475 proc_show_pdrv_ch2(struct seq_file *m, void *v)
2476 {
2477         return proc_show_pdrv(m, m->private, 2);
2478 }
2479
2480
2481 /**
2482  * proc_show_pdrv_ch3()
2483  * @m: Synthetic file construction data
2484  * @v: File iterator
2485  *
2486  * Display information about the physical drives on physical channel 3.
2487  */
2488 static int
2489 proc_show_pdrv_ch3(struct seq_file *m, void *v)
2490 {
2491         return proc_show_pdrv(m, m->private, 3);
2492 }
2493
2494
2495 /**
2496  * proc_show_rdrv()
2497  * @m: Synthetic file construction data
2498  * @adapter: pointer to our soft state
2499  * @start: starting logical drive to display
2500  * @end: ending logical drive to display
2501  *
2502  * We do not print the inquiry information since its already available through
2503  * /proc/scsi/scsi interface
2504  */
2505 static int
2506 proc_show_rdrv(struct seq_file *m, adapter_t *adapter, int start, int end )
2507 {
2508         dma_addr_t      dma_handle;
2509         logdrv_param    *lparam;
2510         megacmd_t       mc;
2511         char            *disk_array;
2512         dma_addr_t      disk_array_dma_handle;
2513         caddr_t         inquiry;
2514         struct pci_dev  *pdev;
2515         u8      *rdrv_state;
2516         int     num_ldrv;
2517         u32     array_sz;
2518         int     i;
2519
2520         if( make_local_pdev(adapter, &pdev) != 0 )
2521                 return 0;
2522
2523         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2524                 goto free_pdev;
2525
2526         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2527                 seq_puts(m, "Adapter inquiry failed.\n");
2528                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2529                 goto free_inquiry;
2530         }
2531
2532         memset(&mc, 0, sizeof(megacmd_t));
2533
2534         if( adapter->flag & BOARD_40LD ) {
2535                 array_sz = sizeof(disk_array_40ld);
2536
2537                 rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
2538
2539                 num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
2540         }
2541         else {
2542                 array_sz = sizeof(disk_array_8ld);
2543
2544                 rdrv_state = ((mraid_ext_inquiry *)inquiry)->
2545                         raid_inq.logdrv_info.ldrv_state;
2546
2547                 num_ldrv = ((mraid_ext_inquiry *)inquiry)->
2548                         raid_inq.logdrv_info.num_ldrv;
2549         }
2550
2551         disk_array = dma_alloc_coherent(&pdev->dev, array_sz,
2552                                         &disk_array_dma_handle, GFP_KERNEL);
2553
2554         if( disk_array == NULL ) {
2555                 seq_puts(m, "memory not available.\n");
2556                 goto free_inquiry;
2557         }
2558
2559         mc.xferaddr = (u32)disk_array_dma_handle;
2560
2561         if( adapter->flag & BOARD_40LD ) {
2562                 mc.cmd = FC_NEW_CONFIG;
2563                 mc.opcode = OP_DCMD_READ_CONFIG;
2564
2565                 if( mega_internal_command(adapter, &mc, NULL) ) {
2566                         seq_puts(m, "40LD read config failed.\n");
2567                         goto free_pci;
2568                 }
2569
2570         }
2571         else {
2572                 mc.cmd = NEW_READ_CONFIG_8LD;
2573
2574                 if( mega_internal_command(adapter, &mc, NULL) ) {
2575                         mc.cmd = READ_CONFIG_8LD;
2576                         if( mega_internal_command(adapter, &mc, NULL) ) {
2577                                 seq_puts(m, "8LD read config failed.\n");
2578                                 goto free_pci;
2579                         }
2580                 }
2581         }
2582
2583         for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
2584
2585                 if( adapter->flag & BOARD_40LD ) {
2586                         lparam =
2587                         &((disk_array_40ld *)disk_array)->ldrv[i].lparam;
2588                 }
2589                 else {
2590                         lparam =
2591                         &((disk_array_8ld *)disk_array)->ldrv[i].lparam;
2592                 }
2593
2594                 /*
2595                  * Check for overflow. We print less than 240 characters for
2596                  * information about each logical drive.
2597                  */
2598                 seq_printf(m, "Logical drive:%2d:, ", i);
2599
2600                 switch( rdrv_state[i] & 0x0F ) {
2601                 case RDRV_OFFLINE:
2602                         seq_puts(m, "state: offline");
2603                         break;
2604                 case RDRV_DEGRADED:
2605                         seq_puts(m, "state: degraded");
2606                         break;
2607                 case RDRV_OPTIMAL:
2608                         seq_puts(m, "state: optimal");
2609                         break;
2610                 case RDRV_DELETED:
2611                         seq_puts(m, "state: deleted");
2612                         break;
2613                 default:
2614                         seq_puts(m, "state: unknown");
2615                         break;
2616                 }
2617
2618                 /*
2619                  * Check if check consistency or initialization is going on
2620                  * for this logical drive.
2621                  */
2622                 if( (rdrv_state[i] & 0xF0) == 0x20 )
2623                         seq_puts(m, ", check-consistency in progress");
2624                 else if( (rdrv_state[i] & 0xF0) == 0x10 )
2625                         seq_puts(m, ", initialization in progress");
2626
2627                 seq_putc(m, '\n');
2628
2629                 seq_printf(m, "Span depth:%3d, ", lparam->span_depth);
2630                 seq_printf(m, "RAID level:%3d, ", lparam->level);
2631                 seq_printf(m, "Stripe size:%3d, ",
2632                            lparam->stripe_sz ? lparam->stripe_sz/2: 128);
2633                 seq_printf(m, "Row size:%3d\n", lparam->row_size);
2634
2635                 seq_puts(m, "Read Policy: ");
2636                 switch(lparam->read_ahead) {
2637                 case NO_READ_AHEAD:
2638                         seq_puts(m, "No read ahead, ");
2639                         break;
2640                 case READ_AHEAD:
2641                         seq_puts(m, "Read ahead, ");
2642                         break;
2643                 case ADAP_READ_AHEAD:
2644                         seq_puts(m, "Adaptive, ");
2645                         break;
2646
2647                 }
2648
2649                 seq_puts(m, "Write Policy: ");
2650                 switch(lparam->write_mode) {
2651                 case WRMODE_WRITE_THRU:
2652                         seq_puts(m, "Write thru, ");
2653                         break;
2654                 case WRMODE_WRITE_BACK:
2655                         seq_puts(m, "Write back, ");
2656                         break;
2657                 }
2658
2659                 seq_puts(m, "Cache Policy: ");
2660                 switch(lparam->direct_io) {
2661                 case CACHED_IO:
2662                         seq_puts(m, "Cached IO\n\n");
2663                         break;
2664                 case DIRECT_IO:
2665                         seq_puts(m, "Direct IO\n\n");
2666                         break;
2667                 }
2668         }
2669
2670 free_pci:
2671         dma_free_coherent(&pdev->dev, array_sz, disk_array,
2672                           disk_array_dma_handle);
2673 free_inquiry:
2674         mega_free_inquiry(inquiry, dma_handle, pdev);
2675 free_pdev:
2676         free_local_pdev(pdev);
2677         return 0;
2678 }
2679
2680 /**
2681  * proc_show_rdrv_10()
2682  * @m: Synthetic file construction data
2683  * @v: File iterator
2684  *
2685  * Display real time information about the logical drives 0 through 9.
2686  */
2687 static int
2688 proc_show_rdrv_10(struct seq_file *m, void *v)
2689 {
2690         return proc_show_rdrv(m, m->private, 0, 9);
2691 }
2692
2693
2694 /**
2695  * proc_show_rdrv_20()
2696  * @m: Synthetic file construction data
2697  * @v: File iterator
2698  *
2699  * Display real time information about the logical drives 0 through 9.
2700  */
2701 static int
2702 proc_show_rdrv_20(struct seq_file *m, void *v)
2703 {
2704         return proc_show_rdrv(m, m->private, 10, 19);
2705 }
2706
2707
2708 /**
2709  * proc_show_rdrv_30()
2710  * @m: Synthetic file construction data
2711  * @v: File iterator
2712  *
2713  * Display real time information about the logical drives 0 through 9.
2714  */
2715 static int
2716 proc_show_rdrv_30(struct seq_file *m, void *v)
2717 {
2718         return proc_show_rdrv(m, m->private, 20, 29);
2719 }
2720
2721
2722 /**
2723  * proc_show_rdrv_40()
2724  * @m: Synthetic file construction data
2725  * @v: File iterator
2726  *
2727  * Display real time information about the logical drives 0 through 9.
2728  */
2729 static int
2730 proc_show_rdrv_40(struct seq_file *m, void *v)
2731 {
2732         return proc_show_rdrv(m, m->private, 30, 39);
2733 }
2734
2735 /**
2736  * mega_create_proc_entry()
2737  * @index: index in soft state array
2738  * @parent: parent node for this /proc entry
2739  *
2740  * Creates /proc entries for our controllers.
2741  */
2742 static void
2743 mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2744 {
2745         adapter_t *adapter = hba_soft_state[index];
2746         struct proc_dir_entry *dir;
2747         u8 string[16];
2748
2749         sprintf(string, "hba%d", adapter->host->host_no);
2750         dir = proc_mkdir_data(string, 0, parent, adapter);
2751         if (!dir) {
2752                 dev_warn(&adapter->dev->dev, "proc_mkdir failed\n");
2753                 return;
2754         }
2755
2756         proc_create_single_data("config", S_IRUSR, dir,
2757                         proc_show_config, adapter);
2758         proc_create_single_data("stat", S_IRUSR, dir,
2759                         proc_show_stat, adapter);
2760         proc_create_single_data("mailbox", S_IRUSR, dir,
2761                         proc_show_mbox, adapter);
2762 #if MEGA_HAVE_ENH_PROC
2763         proc_create_single_data("rebuild-rate", S_IRUSR, dir,
2764                         proc_show_rebuild_rate, adapter);
2765         proc_create_single_data("battery-status", S_IRUSR, dir,
2766                         proc_show_battery, adapter);
2767         proc_create_single_data("diskdrives-ch0", S_IRUSR, dir,
2768                         proc_show_pdrv_ch0, adapter);
2769         proc_create_single_data("diskdrives-ch1", S_IRUSR, dir,
2770                         proc_show_pdrv_ch1, adapter);
2771         proc_create_single_data("diskdrives-ch2", S_IRUSR, dir,
2772                         proc_show_pdrv_ch2, adapter);
2773         proc_create_single_data("diskdrives-ch3", S_IRUSR, dir,
2774                         proc_show_pdrv_ch3, adapter);
2775         proc_create_single_data("raiddrives-0-9", S_IRUSR, dir,
2776                         proc_show_rdrv_10, adapter);
2777         proc_create_single_data("raiddrives-10-19", S_IRUSR, dir,
2778                         proc_show_rdrv_20, adapter);
2779         proc_create_single_data("raiddrives-20-29", S_IRUSR, dir,
2780                         proc_show_rdrv_30, adapter);
2781         proc_create_single_data("raiddrives-30-39", S_IRUSR, dir,
2782                         proc_show_rdrv_40, adapter);
2783 #endif
2784 }
2785
2786 #else
2787 static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2788 {
2789 }
2790 #endif
2791
2792
2793 /*
2794  * megaraid_biosparam()
2795  *
2796  * Return the disk geometry for a particular disk
2797  */
2798 static int
2799 megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
2800                     sector_t capacity, int geom[])
2801 {
2802         adapter_t       *adapter;
2803         int     heads;
2804         int     sectors;
2805         int     cylinders;
2806
2807         /* Get pointer to host config structure */
2808         adapter = (adapter_t *)sdev->host->hostdata;
2809
2810         if (IS_RAID_CH(adapter, sdev->channel)) {
2811                         /* Default heads (64) & sectors (32) */
2812                         heads = 64;
2813                         sectors = 32;
2814                         cylinders = (ulong)capacity / (heads * sectors);
2815
2816                         /*
2817                          * Handle extended translation size for logical drives
2818                          * > 1Gb
2819                          */
2820                         if ((ulong)capacity >= 0x200000) {
2821                                 heads = 255;
2822                                 sectors = 63;
2823                                 cylinders = (ulong)capacity / (heads * sectors);
2824                         }
2825
2826                         /* return result */
2827                         geom[0] = heads;
2828                         geom[1] = sectors;
2829                         geom[2] = cylinders;
2830         }
2831         else {
2832                 if (scsi_partsize(bdev, capacity, geom))
2833                         return 0;
2834
2835                 dev_info(&adapter->dev->dev,
2836                          "invalid partition on this disk on channel %d\n",
2837                          sdev->channel);
2838
2839                 /* Default heads (64) & sectors (32) */
2840                 heads = 64;
2841                 sectors = 32;
2842                 cylinders = (ulong)capacity / (heads * sectors);
2843
2844                 /* Handle extended translation size for logical drives > 1Gb */
2845                 if ((ulong)capacity >= 0x200000) {
2846                         heads = 255;
2847                         sectors = 63;
2848                         cylinders = (ulong)capacity / (heads * sectors);
2849                 }
2850
2851                 /* return result */
2852                 geom[0] = heads;
2853                 geom[1] = sectors;
2854                 geom[2] = cylinders;
2855         }
2856
2857         return 0;
2858 }
2859
2860 /**
2861  * mega_init_scb()
2862  * @adapter: pointer to our soft state
2863  *
2864  * Allocate memory for the various pointers in the scb structures:
2865  * scatter-gather list pointer, passthru and extended passthru structure
2866  * pointers.
2867  */
2868 static int
2869 mega_init_scb(adapter_t *adapter)
2870 {
2871         scb_t   *scb;
2872         int     i;
2873
2874         for( i = 0; i < adapter->max_cmds; i++ ) {
2875
2876                 scb = &adapter->scb_list[i];
2877
2878                 scb->sgl64 = NULL;
2879                 scb->sgl = NULL;
2880                 scb->pthru = NULL;
2881                 scb->epthru = NULL;
2882         }
2883
2884         for( i = 0; i < adapter->max_cmds; i++ ) {
2885
2886                 scb = &adapter->scb_list[i];
2887
2888                 scb->idx = i;
2889
2890                 scb->sgl64 = dma_alloc_coherent(&adapter->dev->dev,
2891                                                 sizeof(mega_sgl64) * adapter->sglen,
2892                                                 &scb->sgl_dma_addr, GFP_KERNEL);
2893
2894                 scb->sgl = (mega_sglist *)scb->sgl64;
2895
2896                 if( !scb->sgl ) {
2897                         dev_warn(&adapter->dev->dev, "RAID: Can't allocate sglist\n");
2898                         mega_free_sgl(adapter);
2899                         return -1;
2900                 }
2901
2902                 scb->pthru = dma_alloc_coherent(&adapter->dev->dev,
2903                                                 sizeof(mega_passthru),
2904                                                 &scb->pthru_dma_addr, GFP_KERNEL);
2905
2906                 if( !scb->pthru ) {
2907                         dev_warn(&adapter->dev->dev, "RAID: Can't allocate passthru\n");
2908                         mega_free_sgl(adapter);
2909                         return -1;
2910                 }
2911
2912                 scb->epthru = dma_alloc_coherent(&adapter->dev->dev,
2913                                                  sizeof(mega_ext_passthru),
2914                                                  &scb->epthru_dma_addr, GFP_KERNEL);
2915
2916                 if( !scb->epthru ) {
2917                         dev_warn(&adapter->dev->dev,
2918                                 "Can't allocate extended passthru\n");
2919                         mega_free_sgl(adapter);
2920                         return -1;
2921                 }
2922
2923
2924                 scb->dma_type = MEGA_DMA_TYPE_NONE;
2925
2926                 /*
2927                  * Link to free list
2928                  * lock not required since we are loading the driver, so no
2929                  * commands possible right now.
2930                  */
2931                 scb->state = SCB_FREE;
2932                 scb->cmd = NULL;
2933                 list_add(&scb->list, &adapter->free_list);
2934         }
2935
2936         return 0;
2937 }
2938
2939
2940 /**
2941  * megadev_open()
2942  * @inode: unused
2943  * @filep: unused
2944  *
2945  * Routines for the character/ioctl interface to the driver. Find out if this
2946  * is a valid open.
2947  */
2948 static int
2949 megadev_open (struct inode *inode, struct file *filep)
2950 {
2951         /*
2952          * Only allow superuser to access private ioctl interface
2953          */
2954         if( !capable(CAP_SYS_ADMIN) ) return -EACCES;
2955
2956         return 0;
2957 }
2958
2959
2960 /**
2961  * megadev_ioctl()
2962  * @filep: Our device file
2963  * @cmd: ioctl command
2964  * @arg: user buffer
2965  *
2966  * ioctl entry point for our private ioctl interface. We move the data in from
2967  * the user space, prepare the command (if necessary, convert the old MIMD
2968  * ioctl to new ioctl command), and issue a synchronous command to the
2969  * controller.
2970  */
2971 static int
2972 megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
2973 {
2974         adapter_t       *adapter;
2975         nitioctl_t      uioc;
2976         int             adapno;
2977         int             rval;
2978         mega_passthru   __user *upthru; /* user address for passthru */
2979         mega_passthru   *pthru;         /* copy user passthru here */
2980         dma_addr_t      pthru_dma_hndl;
2981         void            *data = NULL;   /* data to be transferred */
2982         dma_addr_t      data_dma_hndl;  /* dma handle for data xfer area */
2983         megacmd_t       mc;
2984 #if MEGA_HAVE_STATS
2985         megastat_t      __user *ustats = NULL;
2986         int             num_ldrv = 0;
2987 #endif
2988         u32             uxferaddr = 0;
2989         struct pci_dev  *pdev;
2990
2991         /*
2992          * Make sure only USCSICMD are issued through this interface.
2993          * MIMD application would still fire different command.
2994          */
2995         if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
2996                 return -EINVAL;
2997         }
2998
2999         /*
3000          * Check and convert a possible MIMD command to NIT command.
3001          * mega_m_to_n() copies the data from the user space, so we do not
3002          * have to do it here.
3003          * NOTE: We will need some user address to copyout the data, therefore
3004          * the inteface layer will also provide us with the required user
3005          * addresses.
3006          */
3007         memset(&uioc, 0, sizeof(nitioctl_t));
3008         if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
3009                 return rval;
3010
3011
3012         switch( uioc.opcode ) {
3013
3014         case GET_DRIVER_VER:
3015                 if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
3016                         return (-EFAULT);
3017
3018                 break;
3019
3020         case GET_N_ADAP:
3021                 if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
3022                         return (-EFAULT);
3023
3024                 /*
3025                  * Shucks. MIMD interface returns a positive value for number
3026                  * of adapters. TODO: Change it to return 0 when there is no
3027                  * applicatio using mimd interface.
3028                  */
3029                 return hba_count;
3030
3031         case GET_ADAP_INFO:
3032
3033                 /*
3034                  * Which adapter
3035                  */
3036                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3037                         return (-ENODEV);
3038
3039                 if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
3040                                 sizeof(struct mcontroller)) )
3041                         return (-EFAULT);
3042                 break;
3043
3044 #if MEGA_HAVE_STATS
3045
3046         case GET_STATS:
3047                 /*
3048                  * Which adapter
3049                  */
3050                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3051                         return (-ENODEV);
3052
3053                 adapter = hba_soft_state[adapno];
3054
3055                 ustats = uioc.uioc_uaddr;
3056
3057                 if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
3058                         return (-EFAULT);
3059
3060                 /*
3061                  * Check for the validity of the logical drive number
3062                  */
3063                 if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
3064
3065                 if( copy_to_user(ustats->nreads, adapter->nreads,
3066                                         num_ldrv*sizeof(u32)) )
3067                         return -EFAULT;
3068
3069                 if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
3070                                         num_ldrv*sizeof(u32)) )
3071                         return -EFAULT;
3072
3073                 if( copy_to_user(ustats->nwrites, adapter->nwrites,
3074                                         num_ldrv*sizeof(u32)) )
3075                         return -EFAULT;
3076
3077                 if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
3078                                         num_ldrv*sizeof(u32)) )
3079                         return -EFAULT;
3080
3081                 if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
3082                                         num_ldrv*sizeof(u32)) )
3083                         return -EFAULT;
3084
3085                 if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
3086                                         num_ldrv*sizeof(u32)) )
3087                         return -EFAULT;
3088
3089                 return 0;
3090
3091 #endif
3092         case MBOX_CMD:
3093
3094                 /*
3095                  * Which adapter
3096                  */
3097                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3098                         return (-ENODEV);
3099
3100                 adapter = hba_soft_state[adapno];
3101
3102                 /*
3103                  * Deletion of logical drive is a special case. The adapter
3104                  * should be quiescent before this command is issued.
3105                  */
3106                 if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
3107                                 uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
3108
3109                         /*
3110                          * Do we support this feature
3111                          */
3112                         if( !adapter->support_random_del ) {
3113                                 dev_warn(&adapter->dev->dev, "logdrv "
3114                                         "delete on non-supporting F/W\n");
3115
3116                                 return (-EINVAL);
3117                         }
3118
3119                         rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
3120
3121                         if( rval == 0 ) {
3122                                 memset(&mc, 0, sizeof(megacmd_t));
3123
3124                                 mc.status = rval;
3125
3126                                 rval = mega_n_to_m((void __user *)arg, &mc);
3127                         }
3128
3129                         return rval;
3130                 }
3131                 /*
3132                  * This interface only support the regular passthru commands.
3133                  * Reject extended passthru and 64-bit passthru
3134                  */
3135                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
3136                         uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
3137
3138                         dev_warn(&adapter->dev->dev, "rejected passthru\n");
3139
3140                         return (-EINVAL);
3141                 }
3142
3143                 /*
3144                  * For all internal commands, the buffer must be allocated in
3145                  * <4GB address range
3146                  */
3147                 if( make_local_pdev(adapter, &pdev) != 0 )
3148                         return -EIO;
3149
3150                 /* Is it a passthru command or a DCMD */
3151                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
3152                         /* Passthru commands */
3153
3154                         pthru = dma_alloc_coherent(&pdev->dev,
3155                                                    sizeof(mega_passthru),
3156                                                    &pthru_dma_hndl, GFP_KERNEL);
3157
3158                         if( pthru == NULL ) {
3159                                 free_local_pdev(pdev);
3160                                 return (-ENOMEM);
3161                         }
3162
3163                         /*
3164                          * The user passthru structure
3165                          */
3166                         upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr;
3167
3168                         /*
3169                          * Copy in the user passthru here.
3170                          */
3171                         if( copy_from_user(pthru, upthru,
3172                                                 sizeof(mega_passthru)) ) {
3173
3174                                 dma_free_coherent(&pdev->dev,
3175                                                   sizeof(mega_passthru),
3176                                                   pthru, pthru_dma_hndl);
3177
3178                                 free_local_pdev(pdev);
3179
3180                                 return (-EFAULT);
3181                         }
3182
3183                         /*
3184                          * Is there a data transfer
3185                          */
3186                         if( pthru->dataxferlen ) {
3187                                 data = dma_alloc_coherent(&pdev->dev,
3188                                                           pthru->dataxferlen,
3189                                                           &data_dma_hndl,
3190                                                           GFP_KERNEL);
3191
3192                                 if( data == NULL ) {
3193                                         dma_free_coherent(&pdev->dev,
3194                                                           sizeof(mega_passthru),
3195                                                           pthru,
3196                                                           pthru_dma_hndl);
3197
3198                                         free_local_pdev(pdev);
3199
3200                                         return (-ENOMEM);
3201                                 }
3202
3203                                 /*
3204                                  * Save the user address and point the kernel
3205                                  * address at just allocated memory
3206                                  */
3207                                 uxferaddr = pthru->dataxferaddr;
3208                                 pthru->dataxferaddr = data_dma_hndl;
3209                         }
3210
3211
3212                         /*
3213                          * Is data coming down-stream
3214                          */
3215                         if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) {
3216                                 /*
3217                                  * Get the user data
3218                                  */
3219                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3220                                                         pthru->dataxferlen) ) {
3221                                         rval = (-EFAULT);
3222                                         goto freemem_and_return;
3223                                 }
3224                         }
3225
3226                         memset(&mc, 0, sizeof(megacmd_t));
3227
3228                         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
3229                         mc.xferaddr = (u32)pthru_dma_hndl;
3230
3231                         /*
3232                          * Issue the command
3233                          */
3234                         mega_internal_command(adapter, &mc, pthru);
3235
3236                         rval = mega_n_to_m((void __user *)arg, &mc);
3237
3238                         if( rval ) goto freemem_and_return;
3239
3240
3241                         /*
3242                          * Is data going up-stream
3243                          */
3244                         if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
3245                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3246                                                         pthru->dataxferlen) ) {
3247                                         rval = (-EFAULT);
3248                                 }
3249                         }
3250
3251                         /*
3252                          * Send the request sense data also, irrespective of
3253                          * whether the user has asked for it or not.
3254                          */
3255                         if (copy_to_user(upthru->reqsensearea,
3256                                         pthru->reqsensearea, 14))
3257                                 rval = -EFAULT;
3258
3259 freemem_and_return:
3260                         if( pthru->dataxferlen ) {
3261                                 dma_free_coherent(&pdev->dev,
3262                                                   pthru->dataxferlen, data,
3263                                                   data_dma_hndl);
3264                         }
3265
3266                         dma_free_coherent(&pdev->dev, sizeof(mega_passthru),
3267                                           pthru, pthru_dma_hndl);
3268
3269                         free_local_pdev(pdev);
3270
3271                         return rval;
3272                 }
3273                 else {
3274                         /* DCMD commands */
3275
3276                         /*
3277                          * Is there a data transfer
3278                          */
3279                         if( uioc.xferlen ) {
3280                                 data = dma_alloc_coherent(&pdev->dev,
3281                                                           uioc.xferlen,
3282                                                           &data_dma_hndl,
3283                                                           GFP_KERNEL);
3284
3285                                 if( data == NULL ) {
3286                                         free_local_pdev(pdev);
3287                                         return (-ENOMEM);
3288                                 }
3289
3290                                 uxferaddr = MBOX(uioc)->xferaddr;
3291                         }
3292
3293                         /*
3294                          * Is data coming down-stream
3295                          */
3296                         if( uioc.xferlen && (uioc.flags & UIOC_WR) ) {
3297                                 /*
3298                                  * Get the user data
3299                                  */
3300                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3301                                                         uioc.xferlen) ) {
3302
3303                                         dma_free_coherent(&pdev->dev,
3304                                                           uioc.xferlen, data,
3305                                                           data_dma_hndl);
3306
3307                                         free_local_pdev(pdev);
3308
3309                                         return (-EFAULT);
3310                                 }
3311                         }
3312
3313                         memcpy(&mc, MBOX(uioc), sizeof(megacmd_t));
3314
3315                         mc.xferaddr = (u32)data_dma_hndl;
3316
3317                         /*
3318                          * Issue the command
3319                          */
3320                         mega_internal_command(adapter, &mc, NULL);
3321
3322                         rval = mega_n_to_m((void __user *)arg, &mc);
3323
3324                         if( rval ) {
3325                                 if( uioc.xferlen ) {
3326                                         dma_free_coherent(&pdev->dev,
3327                                                           uioc.xferlen, data,
3328                                                           data_dma_hndl);
3329                                 }
3330
3331                                 free_local_pdev(pdev);
3332
3333                                 return rval;
3334                         }
3335
3336                         /*
3337                          * Is data going up-stream
3338                          */
3339                         if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
3340                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3341                                                         uioc.xferlen) ) {
3342
3343                                         rval = (-EFAULT);
3344                                 }
3345                         }
3346
3347                         if( uioc.xferlen ) {
3348                                 dma_free_coherent(&pdev->dev, uioc.xferlen,
3349                                                   data, data_dma_hndl);
3350                         }
3351
3352                         free_local_pdev(pdev);
3353
3354                         return rval;
3355                 }
3356
3357         default:
3358                 return (-EINVAL);
3359         }
3360
3361         return 0;
3362 }
3363
3364 static long
3365 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3366 {
3367         int ret;
3368
3369         mutex_lock(&megadev_mutex);
3370         ret = megadev_ioctl(filep, cmd, arg);
3371         mutex_unlock(&megadev_mutex);
3372
3373         return ret;
3374 }
3375
3376 /**
3377  * mega_m_to_n()
3378  * @arg: user address
3379  * @uioc: new ioctl structure
3380  *
3381  * A thin layer to convert older mimd interface ioctl structure to NIT ioctl
3382  * structure
3383  *
3384  * Converts the older mimd ioctl structure to newer NIT structure
3385  */
3386 static int
3387 mega_m_to_n(void __user *arg, nitioctl_t *uioc)
3388 {
3389         struct uioctl_t uioc_mimd;
3390         char    signature[8] = {0};
3391         u8      opcode;
3392         u8      subopcode;
3393
3394
3395         /*
3396          * check is the application conforms to NIT. We do not have to do much
3397          * in that case.
3398          * We exploit the fact that the signature is stored in the very
3399          * beginning of the structure.
3400          */
3401
3402         if( copy_from_user(signature, arg, 7) )
3403                 return (-EFAULT);
3404
3405         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3406
3407                 /*
3408                  * NOTE NOTE: The nit ioctl is still under flux because of
3409                  * change of mailbox definition, in HPE. No applications yet
3410                  * use this interface and let's not have applications use this
3411                  * interface till the new specifitions are in place.
3412                  */
3413                 return -EINVAL;
3414 #if 0
3415                 if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
3416                         return (-EFAULT);
3417                 return 0;
3418 #endif
3419         }
3420
3421         /*
3422          * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
3423          *
3424          * Get the user ioctl structure
3425          */
3426         if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
3427                 return (-EFAULT);
3428
3429
3430         /*
3431          * Get the opcode and subopcode for the commands
3432          */
3433         opcode = uioc_mimd.ui.fcs.opcode;
3434         subopcode = uioc_mimd.ui.fcs.subopcode;
3435
3436         switch (opcode) {
3437         case 0x82:
3438
3439                 switch (subopcode) {
3440
3441                 case MEGAIOC_QDRVRVER:  /* Query driver version */
3442                         uioc->opcode = GET_DRIVER_VER;
3443                         uioc->uioc_uaddr = uioc_mimd.data;
3444                         break;
3445
3446                 case MEGAIOC_QNADAP:    /* Get # of adapters */
3447                         uioc->opcode = GET_N_ADAP;
3448                         uioc->uioc_uaddr = uioc_mimd.data;
3449                         break;
3450
3451                 case MEGAIOC_QADAPINFO: /* Get adapter information */
3452                         uioc->opcode = GET_ADAP_INFO;
3453                         uioc->adapno = uioc_mimd.ui.fcs.adapno;
3454                         uioc->uioc_uaddr = uioc_mimd.data;
3455                         break;
3456
3457                 default:
3458                         return(-EINVAL);
3459                 }
3460
3461                 break;
3462
3463
3464         case 0x81:
3465
3466                 uioc->opcode = MBOX_CMD;
3467                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3468
3469                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3470
3471                 uioc->xferlen = uioc_mimd.ui.fcs.length;
3472
3473                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3474                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3475
3476                 break;
3477
3478         case 0x80:
3479
3480                 uioc->opcode = MBOX_CMD;
3481                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3482
3483                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3484
3485                 /*
3486                  * Choose the xferlen bigger of input and output data
3487                  */
3488                 uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
3489                         uioc_mimd.outlen : uioc_mimd.inlen;
3490
3491                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3492                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3493
3494                 break;
3495
3496         default:
3497                 return (-EINVAL);
3498
3499         }
3500
3501         return 0;
3502 }
3503
3504 /*
3505  * mega_n_to_m()
3506  * @arg: user address
3507  * @mc: mailbox command
3508  *
3509  * Updates the status information to the application, depending on application
3510  * conforms to older mimd ioctl interface or newer NIT ioctl interface
3511  */
3512 static int
3513 mega_n_to_m(void __user *arg, megacmd_t *mc)
3514 {
3515         nitioctl_t      __user *uiocp;
3516         megacmd_t       __user *umc;
3517         mega_passthru   __user *upthru;
3518         struct uioctl_t __user *uioc_mimd;
3519         char    signature[8] = {0};
3520
3521         /*
3522          * check is the application conforms to NIT.
3523          */
3524         if( copy_from_user(signature, arg, 7) )
3525                 return -EFAULT;
3526
3527         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3528
3529                 uiocp = arg;
3530
3531                 if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
3532                         return (-EFAULT);
3533
3534                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3535
3536                         umc = MBOX_P(uiocp);
3537
3538                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3539                                 return -EFAULT;
3540
3541                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
3542                                 return (-EFAULT);
3543                 }
3544         }
3545         else {
3546                 uioc_mimd = arg;
3547
3548                 if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
3549                         return (-EFAULT);
3550
3551                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3552
3553                         umc = (megacmd_t __user *)uioc_mimd->mbox;
3554
3555                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3556                                 return (-EFAULT);
3557
3558                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
3559                                 return (-EFAULT);
3560                 }
3561         }
3562
3563         return 0;
3564 }
3565
3566
3567 /*
3568  * MEGARAID 'FW' commands.
3569  */
3570
3571 /**
3572  * mega_is_bios_enabled()
3573  * @adapter: pointer to our soft state
3574  *
3575  * issue command to find out if the BIOS is enabled for this controller
3576  */
3577 static int
3578 mega_is_bios_enabled(adapter_t *adapter)
3579 {
3580         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3581         mbox_t  *mbox;
3582
3583         mbox = (mbox_t *)raw_mbox;
3584
3585         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3586
3587         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3588
3589         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3590
3591         raw_mbox[0] = IS_BIOS_ENABLED;
3592         raw_mbox[2] = GET_BIOS;
3593
3594         issue_scb_block(adapter, raw_mbox);
3595
3596         return *(char *)adapter->mega_buffer;
3597 }
3598
3599
3600 /**
3601  * mega_enum_raid_scsi()
3602  * @adapter: pointer to our soft state
3603  *
3604  * Find out what channels are RAID/SCSI. This information is used to
3605  * differentiate the virtual channels and physical channels and to support
3606  * ROMB feature and non-disk devices.
3607  */
3608 static void
3609 mega_enum_raid_scsi(adapter_t *adapter)
3610 {
3611         unsigned char raw_mbox[sizeof(struct mbox_out)];
3612         mbox_t *mbox;
3613         int i;
3614
3615         mbox = (mbox_t *)raw_mbox;
3616
3617         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3618
3619         /*
3620          * issue command to find out what channels are raid/scsi
3621          */
3622         raw_mbox[0] = CHNL_CLASS;
3623         raw_mbox[2] = GET_CHNL_CLASS;
3624
3625         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3626
3627         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3628
3629         /*
3630          * Non-ROMB firmware fail this command, so all channels
3631          * must be shown RAID
3632          */
3633         adapter->mega_ch_class = 0xFF;
3634
3635         if(!issue_scb_block(adapter, raw_mbox)) {
3636                 adapter->mega_ch_class = *((char *)adapter->mega_buffer);
3637
3638         }
3639
3640         for( i = 0; i < adapter->product_info.nchannels; i++ ) {
3641                 if( (adapter->mega_ch_class >> i) & 0x01 ) {
3642                         dev_info(&adapter->dev->dev, "channel[%d] is raid\n",
3643                                         i);
3644                 }
3645                 else {
3646                         dev_info(&adapter->dev->dev, "channel[%d] is scsi\n",
3647                                         i);
3648                 }
3649         }
3650
3651         return;
3652 }
3653
3654
3655 /**
3656  * mega_get_boot_drv()
3657  * @adapter: pointer to our soft state
3658  *
3659  * Find out which device is the boot device. Note, any logical drive or any
3660  * phyical device (e.g., a CDROM) can be designated as a boot device.
3661  */
3662 static void
3663 mega_get_boot_drv(adapter_t *adapter)
3664 {
3665         struct private_bios_data        *prv_bios_data;
3666         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3667         mbox_t  *mbox;
3668         u16     cksum = 0;
3669         u8      *cksum_p;
3670         u8      boot_pdrv;
3671         int     i;
3672
3673         mbox = (mbox_t *)raw_mbox;
3674
3675         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3676
3677         raw_mbox[0] = BIOS_PVT_DATA;
3678         raw_mbox[2] = GET_BIOS_PVT_DATA;
3679
3680         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3681
3682         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3683
3684         adapter->boot_ldrv_enabled = 0;
3685         adapter->boot_ldrv = 0;
3686
3687         adapter->boot_pdrv_enabled = 0;
3688         adapter->boot_pdrv_ch = 0;
3689         adapter->boot_pdrv_tgt = 0;
3690
3691         if(issue_scb_block(adapter, raw_mbox) == 0) {
3692                 prv_bios_data =
3693                         (struct private_bios_data *)adapter->mega_buffer;
3694
3695                 cksum = 0;
3696                 cksum_p = (char *)prv_bios_data;
3697                 for (i = 0; i < 14; i++ ) {
3698                         cksum += (u16)(*cksum_p++);
3699                 }
3700
3701                 if (prv_bios_data->cksum == (u16)(0-cksum) ) {
3702
3703                         /*
3704                          * If MSB is set, a physical drive is set as boot
3705                          * device
3706                          */
3707                         if( prv_bios_data->boot_drv & 0x80 ) {
3708                                 adapter->boot_pdrv_enabled = 1;
3709                                 boot_pdrv = prv_bios_data->boot_drv & 0x7F;
3710                                 adapter->boot_pdrv_ch = boot_pdrv / 16;
3711                                 adapter->boot_pdrv_tgt = boot_pdrv % 16;
3712                         }
3713                         else {
3714                                 adapter->boot_ldrv_enabled = 1;
3715                                 adapter->boot_ldrv = prv_bios_data->boot_drv;
3716                         }
3717                 }
3718         }
3719
3720 }
3721
3722 /**
3723  * mega_support_random_del()
3724  * @adapter: pointer to our soft state
3725  *
3726  * Find out if this controller supports random deletion and addition of
3727  * logical drives
3728  */
3729 static int
3730 mega_support_random_del(adapter_t *adapter)
3731 {
3732         unsigned char raw_mbox[sizeof(struct mbox_out)];
3733         mbox_t *mbox;
3734         int rval;
3735
3736         mbox = (mbox_t *)raw_mbox;
3737
3738         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3739
3740         /*
3741          * issue command
3742          */
3743         raw_mbox[0] = FC_DEL_LOGDRV;
3744         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3745
3746         rval = issue_scb_block(adapter, raw_mbox);
3747
3748         return !rval;
3749 }
3750
3751
3752 /**
3753  * mega_support_ext_cdb()
3754  * @adapter: pointer to our soft state
3755  *
3756  * Find out if this firmware support cdblen > 10
3757  */
3758 static int
3759 mega_support_ext_cdb(adapter_t *adapter)
3760 {
3761         unsigned char raw_mbox[sizeof(struct mbox_out)];
3762         mbox_t *mbox;
3763         int rval;
3764
3765         mbox = (mbox_t *)raw_mbox;
3766
3767         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3768         /*
3769          * issue command to find out if controller supports extended CDBs.
3770          */
3771         raw_mbox[0] = 0xA4;
3772         raw_mbox[2] = 0x16;
3773
3774         rval = issue_scb_block(adapter, raw_mbox);
3775
3776         return !rval;
3777 }
3778
3779
3780 /**
3781  * mega_del_logdrv()
3782  * @adapter: pointer to our soft state
3783  * @logdrv: logical drive to be deleted
3784  *
3785  * Delete the specified logical drive. It is the responsibility of the user
3786  * app to let the OS know about this operation.
3787  */
3788 static int
3789 mega_del_logdrv(adapter_t *adapter, int logdrv)
3790 {
3791         unsigned long flags;
3792         scb_t *scb;
3793         int rval;
3794
3795         /*
3796          * Stop sending commands to the controller, queue them internally.
3797          * When deletion is complete, ISR will flush the queue.
3798          */
3799         atomic_set(&adapter->quiescent, 1);
3800
3801         /*
3802          * Wait till all the issued commands are complete and there are no
3803          * commands in the pending queue
3804          */
3805         while (atomic_read(&adapter->pend_cmds) > 0 ||
3806                !list_empty(&adapter->pending_list))
3807                 msleep(1000);   /* sleep for 1s */
3808
3809         rval = mega_do_del_logdrv(adapter, logdrv);
3810
3811         spin_lock_irqsave(&adapter->lock, flags);
3812
3813         /*
3814          * If delete operation was successful, add 0x80 to the logical drive
3815          * ids for commands in the pending queue.
3816          */
3817         if (adapter->read_ldidmap) {
3818                 struct list_head *pos;
3819                 list_for_each(pos, &adapter->pending_list) {
3820                         scb = list_entry(pos, scb_t, list);
3821                         if (scb->pthru->logdrv < 0x80 )
3822                                 scb->pthru->logdrv += 0x80;
3823                 }
3824         }
3825
3826         atomic_set(&adapter->quiescent, 0);
3827
3828         mega_runpendq(adapter);
3829
3830         spin_unlock_irqrestore(&adapter->lock, flags);
3831
3832         return rval;
3833 }
3834
3835
3836 static int
3837 mega_do_del_logdrv(adapter_t *adapter, int logdrv)
3838 {
3839         megacmd_t       mc;
3840         int     rval;
3841
3842         memset( &mc, 0, sizeof(megacmd_t));
3843
3844         mc.cmd = FC_DEL_LOGDRV;
3845         mc.opcode = OP_DEL_LOGDRV;
3846         mc.subopcode = logdrv;
3847
3848         rval = mega_internal_command(adapter, &mc, NULL);
3849
3850         /* log this event */
3851         if(rval) {
3852                 dev_warn(&adapter->dev->dev, "Delete LD-%d failed", logdrv);
3853                 return rval;
3854         }
3855
3856         /*
3857          * After deleting first logical drive, the logical drives must be
3858          * addressed by adding 0x80 to the logical drive id.
3859          */
3860         adapter->read_ldidmap = 1;
3861
3862         return rval;
3863 }
3864
3865
3866 /**
3867  * mega_get_max_sgl()
3868  * @adapter: pointer to our soft state
3869  *
3870  * Find out the maximum number of scatter-gather elements supported by this
3871  * version of the firmware
3872  */
3873 static void
3874 mega_get_max_sgl(adapter_t *adapter)
3875 {
3876         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3877         mbox_t  *mbox;
3878
3879         mbox = (mbox_t *)raw_mbox;
3880
3881         memset(mbox, 0, sizeof(raw_mbox));
3882
3883         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3884
3885         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3886
3887         raw_mbox[0] = MAIN_MISC_OPCODE;
3888         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3889
3890
3891         if( issue_scb_block(adapter, raw_mbox) ) {
3892                 /*
3893                  * f/w does not support this command. Choose the default value
3894                  */
3895                 adapter->sglen = MIN_SGLIST;
3896         }
3897         else {
3898                 adapter->sglen = *((char *)adapter->mega_buffer);
3899
3900                 /*
3901                  * Make sure this is not more than the resources we are
3902                  * planning to allocate
3903                  */
3904                 if ( adapter->sglen > MAX_SGLIST )
3905                         adapter->sglen = MAX_SGLIST;
3906         }
3907
3908         return;
3909 }
3910
3911
3912 /**
3913  * mega_support_cluster()
3914  * @adapter: pointer to our soft state
3915  *
3916  * Find out if this firmware support cluster calls.
3917  */
3918 static int
3919 mega_support_cluster(adapter_t *adapter)
3920 {
3921         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3922         mbox_t  *mbox;
3923
3924         mbox = (mbox_t *)raw_mbox;
3925
3926         memset(mbox, 0, sizeof(raw_mbox));
3927
3928         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3929
3930         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3931
3932         /*
3933          * Try to get the initiator id. This command will succeed iff the
3934          * clustering is available on this HBA.
3935          */
3936         raw_mbox[0] = MEGA_GET_TARGET_ID;
3937
3938         if( issue_scb_block(adapter, raw_mbox) == 0 ) {
3939
3940                 /*
3941                  * Cluster support available. Get the initiator target id.
3942                  * Tell our id to mid-layer too.
3943                  */
3944                 adapter->this_id = *(u32 *)adapter->mega_buffer;
3945                 adapter->host->this_id = adapter->this_id;
3946
3947                 return 1;
3948         }
3949
3950         return 0;
3951 }
3952
3953 #ifdef CONFIG_PROC_FS
3954 /**
3955  * mega_adapinq()
3956  * @adapter: pointer to our soft state
3957  * @dma_handle: DMA address of the buffer
3958  *
3959  * Issue internal commands while interrupts are available.
3960  * We only issue direct mailbox commands from within the driver. ioctl()
3961  * interface using these routines can issue passthru commands.
3962  */
3963 static int
3964 mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle)
3965 {
3966         megacmd_t       mc;
3967
3968         memset(&mc, 0, sizeof(megacmd_t));
3969
3970         if( adapter->flag & BOARD_40LD ) {
3971                 mc.cmd = FC_NEW_CONFIG;
3972                 mc.opcode = NC_SUBOP_ENQUIRY3;
3973                 mc.subopcode = ENQ3_GET_SOLICITED_FULL;
3974         }
3975         else {
3976                 mc.cmd = MEGA_MBOXCMD_ADPEXTINQ;
3977         }
3978
3979         mc.xferaddr = (u32)dma_handle;
3980
3981         if ( mega_internal_command(adapter, &mc, NULL) != 0 ) {
3982                 return -1;
3983         }
3984
3985         return 0;
3986 }
3987
3988
3989 /**
3990  * mega_internal_dev_inquiry()
3991  * @adapter: pointer to our soft state
3992  * @ch: channel for this device
3993  * @tgt: ID of this device
3994  * @buf_dma_handle: DMA address of the buffer
3995  *
3996  * Issue the scsi inquiry for the specified device.
3997  */
3998 static int
3999 mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt,
4000                 dma_addr_t buf_dma_handle)
4001 {
4002         mega_passthru   *pthru;
4003         dma_addr_t      pthru_dma_handle;
4004         megacmd_t       mc;
4005         int             rval;
4006         struct pci_dev  *pdev;
4007
4008
4009         /*
4010          * For all internal commands, the buffer must be allocated in <4GB
4011          * address range
4012          */
4013         if( make_local_pdev(adapter, &pdev) != 0 ) return -1;
4014
4015         pthru = dma_alloc_coherent(&pdev->dev, sizeof(mega_passthru),
4016                                    &pthru_dma_handle, GFP_KERNEL);
4017
4018         if( pthru == NULL ) {
4019                 free_local_pdev(pdev);
4020                 return -1;
4021         }
4022
4023         pthru->timeout = 2;
4024         pthru->ars = 1;
4025         pthru->reqsenselen = 14;
4026         pthru->islogical = 0;
4027
4028         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch;
4029
4030         pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt;
4031
4032         pthru->cdblen = 6;
4033
4034         pthru->cdb[0] = INQUIRY;
4035         pthru->cdb[1] = 0;
4036         pthru->cdb[2] = 0;
4037         pthru->cdb[3] = 0;
4038         pthru->cdb[4] = 255;
4039         pthru->cdb[5] = 0;
4040
4041
4042         pthru->dataxferaddr = (u32)buf_dma_handle;
4043         pthru->dataxferlen = 256;
4044
4045         memset(&mc, 0, sizeof(megacmd_t));
4046
4047         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
4048         mc.xferaddr = (u32)pthru_dma_handle;
4049
4050         rval = mega_internal_command(adapter, &mc, pthru);
4051
4052         dma_free_coherent(&pdev->dev, sizeof(mega_passthru), pthru,
4053                           pthru_dma_handle);
4054
4055         free_local_pdev(pdev);
4056
4057         return rval;
4058 }
4059 #endif
4060
4061 /**
4062  * mega_internal_command()
4063  * @adapter: pointer to our soft state
4064  * @mc: the mailbox command
4065  * @pthru: Passthru structure for DCDB commands
4066  *
4067  * Issue the internal commands in interrupt mode.
4068  * The last argument is the address of the passthru structure if the command
4069  * to be fired is a passthru command
4070  *
4071  * Note: parameter 'pthru' is null for non-passthru commands.
4072  */
4073 static int
4074 mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
4075 {
4076         unsigned long flags;
4077         scb_t   *scb;
4078         int     rval;
4079
4080         /*
4081          * The internal commands share one command id and hence are
4082          * serialized. This is so because we want to reserve maximum number of
4083          * available command ids for the I/O commands.
4084          */
4085         mutex_lock(&adapter->int_mtx);
4086
4087         scb = &adapter->int_scb;
4088         memset(scb, 0, sizeof(scb_t));
4089
4090         scb->idx = CMDID_INT_CMDS;
4091         scb->state |= SCB_ACTIVE | SCB_PENDQ;
4092
4093         memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
4094
4095         /*
4096          * Is it a passthru command
4097          */
4098         if (mc->cmd == MEGA_MBOXCMD_PASSTHRU)
4099                 scb->pthru = pthru;
4100
4101         spin_lock_irqsave(&adapter->lock, flags);
4102         list_add_tail(&scb->list, &adapter->pending_list);
4103         /*
4104          * Check if the HBA is in quiescent state, e.g., during a
4105          * delete logical drive opertion. If it is, don't run
4106          * the pending_list.
4107          */
4108         if (atomic_read(&adapter->quiescent) == 0)
4109                 mega_runpendq(adapter);
4110         spin_unlock_irqrestore(&adapter->lock, flags);
4111
4112         wait_for_completion(&adapter->int_waitq);
4113
4114         mc->status = rval = adapter->int_status;
4115
4116         /*
4117          * Print a debug message for all failed commands. Applications can use
4118          * this information.
4119          */
4120         if (rval && trace_level) {
4121                 dev_info(&adapter->dev->dev, "cmd [%x, %x, %x] status:[%x]\n",
4122                         mc->cmd, mc->opcode, mc->subopcode, rval);
4123         }
4124
4125         mutex_unlock(&adapter->int_mtx);
4126         return rval;
4127 }
4128
4129 static struct scsi_host_template megaraid_template = {
4130         .module                         = THIS_MODULE,
4131         .name                           = "MegaRAID",
4132         .proc_name                      = "megaraid_legacy",
4133         .info                           = megaraid_info,
4134         .queuecommand                   = megaraid_queue,
4135         .bios_param                     = megaraid_biosparam,
4136         .max_sectors                    = MAX_SECTORS_PER_IO,
4137         .can_queue                      = MAX_COMMANDS,
4138         .this_id                        = DEFAULT_INITIATOR_ID,
4139         .sg_tablesize                   = MAX_SGLIST,
4140         .cmd_per_lun                    = DEF_CMD_PER_LUN,
4141         .eh_abort_handler               = megaraid_abort,
4142         .eh_device_reset_handler        = megaraid_reset,
4143         .eh_bus_reset_handler           = megaraid_reset,
4144         .eh_host_reset_handler          = megaraid_reset,
4145         .no_write_same                  = 1,
4146 };
4147
4148 static int
4149 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
4150 {
4151         struct Scsi_Host *host;
4152         adapter_t *adapter;
4153         unsigned long mega_baseport, tbase, flag = 0;
4154         u16 subsysid, subsysvid;
4155         u8 pci_bus, pci_dev_func;
4156         int irq, i, j;
4157         int error = -ENODEV;
4158
4159         if (hba_count >= MAX_CONTROLLERS)
4160                 goto out;
4161
4162         if (pci_enable_device(pdev))
4163                 goto out;
4164         pci_set_master(pdev);
4165
4166         pci_bus = pdev->bus->number;
4167         pci_dev_func = pdev->devfn;
4168
4169         /*
4170          * The megaraid3 stuff reports the ID of the Intel part which is not
4171          * remotely specific to the megaraid
4172          */
4173         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
4174                 u16 magic;
4175                 /*
4176                  * Don't fall over the Compaq management cards using the same
4177                  * PCI identifier
4178                  */
4179                 if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
4180                     pdev->subsystem_device == 0xC000)
4181                         goto out_disable_device;
4182                 /* Now check the magic signature byte */
4183                 pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
4184                 if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
4185                         goto out_disable_device;
4186                 /* Ok it is probably a megaraid */
4187         }
4188
4189         /*
4190          * For these vendor and device ids, signature offsets are not
4191          * valid and 64 bit is implicit
4192          */
4193         if (id->driver_data & BOARD_64BIT)
4194                 flag |= BOARD_64BIT;
4195         else {
4196                 u32 magic64;
4197
4198                 pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
4199                 if (magic64 == HBA_SIGNATURE_64BIT)
4200                         flag |= BOARD_64BIT;
4201         }
4202
4203         subsysvid = pdev->subsystem_vendor;
4204         subsysid = pdev->subsystem_device;
4205
4206         dev_notice(&pdev->dev, "found 0x%4.04x:0x%4.04x\n",
4207                 id->vendor, id->device);
4208
4209         /* Read the base port and IRQ from PCI */
4210         mega_baseport = pci_resource_start(pdev, 0);
4211         irq = pdev->irq;
4212
4213         tbase = mega_baseport;
4214         if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
4215                 flag |= BOARD_MEMMAP;
4216
4217                 if (!request_mem_region(mega_baseport, 128, "megaraid")) {
4218                         dev_warn(&pdev->dev, "mem region busy!\n");
4219                         goto out_disable_device;
4220                 }
4221
4222                 mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
4223                 if (!mega_baseport) {
4224                         dev_warn(&pdev->dev, "could not map hba memory\n");
4225                         goto out_release_region;
4226                 }
4227         } else {
4228                 flag |= BOARD_IOMAP;
4229                 mega_baseport += 0x10;
4230
4231                 if (!request_region(mega_baseport, 16, "megaraid"))
4232                         goto out_disable_device;
4233         }
4234
4235         /* Initialize SCSI Host structure */
4236         host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
4237         if (!host)
4238                 goto out_iounmap;
4239
4240         adapter = (adapter_t *)host->hostdata;
4241         memset(adapter, 0, sizeof(adapter_t));
4242
4243         dev_notice(&pdev->dev,
4244                 "scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
4245                 host->host_no, mega_baseport, irq);
4246
4247         adapter->base = mega_baseport;
4248         if (flag & BOARD_MEMMAP)
4249                 adapter->mmio_base = (void __iomem *) mega_baseport;
4250
4251         INIT_LIST_HEAD(&adapter->free_list);
4252         INIT_LIST_HEAD(&adapter->pending_list);
4253         INIT_LIST_HEAD(&adapter->completed_list);
4254
4255         adapter->flag = flag;
4256         spin_lock_init(&adapter->lock);
4257
4258         host->cmd_per_lun = max_cmd_per_lun;
4259         host->max_sectors = max_sectors_per_io;
4260
4261         adapter->dev = pdev;
4262         adapter->host = host;
4263
4264         adapter->host->irq = irq;
4265
4266         if (flag & BOARD_MEMMAP)
4267                 adapter->host->base = tbase;
4268         else {
4269                 adapter->host->io_port = tbase;
4270                 adapter->host->n_io_port = 16;
4271         }
4272
4273         adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;
4274
4275         /*
4276          * Allocate buffer to issue internal commands.
4277          */
4278         adapter->mega_buffer = dma_alloc_coherent(&adapter->dev->dev,
4279                                                   MEGA_BUFFER_SIZE,
4280                                                   &adapter->buf_dma_handle,
4281                                                   GFP_KERNEL);
4282         if (!adapter->mega_buffer) {
4283                 dev_warn(&pdev->dev, "out of RAM\n");
4284                 goto out_host_put;
4285         }
4286
4287         adapter->scb_list = kmalloc_array(MAX_COMMANDS, sizeof(scb_t),
4288                                           GFP_KERNEL);
4289         if (!adapter->scb_list) {
4290                 dev_warn(&pdev->dev, "out of RAM\n");
4291                 goto out_free_cmd_buffer;
4292         }
4293
4294         if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
4295                                 megaraid_isr_memmapped : megaraid_isr_iomapped,
4296                                         IRQF_SHARED, "megaraid", adapter)) {
4297                 dev_warn(&pdev->dev, "Couldn't register IRQ %d!\n", irq);
4298                 goto out_free_scb_list;
4299         }
4300
4301         if (mega_setup_mailbox(adapter))
4302                 goto out_free_irq;
4303
4304         if (mega_query_adapter(adapter))
4305                 goto out_free_mbox;
4306
4307         /*
4308          * Have checks for some buggy f/w
4309          */
4310         if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
4311                 /*
4312                  * Which firmware
4313                  */
4314                 if (!strcmp(adapter->fw_version, "3.00") ||
4315                                 !strcmp(adapter->fw_version, "3.01")) {
4316
4317                         dev_warn(&pdev->dev,
4318                                 "Your card is a Dell PERC "
4319                                 "2/SC RAID controller with "
4320                                 "firmware\nmegaraid: 3.00 or 3.01.  "
4321                                 "This driver is known to have "
4322                                 "corruption issues\nmegaraid: with "
4323                                 "those firmware versions on this "
4324                                 "specific card.  In order\nmegaraid: "
4325                                 "to protect your data, please upgrade "
4326                                 "your firmware to version\nmegaraid: "
4327                                 "3.10 or later, available from the "
4328                                 "Dell Technical Support web\n"
4329                                 "megaraid: site at\nhttp://support."
4330                                 "dell.com/us/en/filelib/download/"
4331                                 "index.asp?fileid=2940\n"
4332                         );
4333                 }
4334         }
4335
4336         /*
4337          * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
4338          * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
4339          * support, since this firmware cannot handle 64 bit
4340          * addressing
4341          */
4342         if ((subsysvid == PCI_VENDOR_ID_HP) &&
4343             ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
4344                 /*
4345                  * which firmware
4346                  */
4347                 if (!strcmp(adapter->fw_version, "H01.07") ||
4348                     !strcmp(adapter->fw_version, "H01.08") ||
4349                     !strcmp(adapter->fw_version, "H01.09") ) {
4350                         dev_warn(&pdev->dev,
4351                                 "Firmware H.01.07, "
4352                                 "H.01.08, and H.01.09 on 1M/2M "
4353                                 "controllers\n"
4354                                 "do not support 64 bit "
4355                                 "addressing.\nDISABLING "
4356                                 "64 bit support.\n");
4357                         adapter->flag &= ~BOARD_64BIT;
4358                 }
4359         }
4360
4361         if (mega_is_bios_enabled(adapter))
4362                 mega_hbas[hba_count].is_bios_enabled = 1;
4363         mega_hbas[hba_count].hostdata_addr = adapter;
4364
4365         /*
4366          * Find out which channel is raid and which is scsi. This is
4367          * for ROMB support.
4368          */
4369         mega_enum_raid_scsi(adapter);
4370
4371         /*
4372          * Find out if a logical drive is set as the boot drive. If
4373          * there is one, will make that as the first logical drive.
4374          * ROMB: Do we have to boot from a physical drive. Then all
4375          * the physical drives would appear before the logical disks.
4376          * Else, all the physical drives would be exported to the mid
4377          * layer after logical drives.
4378          */
4379         mega_get_boot_drv(adapter);
4380
4381         if (adapter->boot_pdrv_enabled) {
4382                 j = adapter->product_info.nchannels;
4383                 for( i = 0; i < j; i++ )
4384                         adapter->logdrv_chan[i] = 0;
4385                 for( i = j; i < NVIRT_CHAN + j; i++ )
4386                         adapter->logdrv_chan[i] = 1;
4387         } else {
4388                 for (i = 0; i < NVIRT_CHAN; i++)
4389                         adapter->logdrv_chan[i] = 1;
4390                 for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
4391                         adapter->logdrv_chan[i] = 0;
4392                 adapter->mega_ch_class <<= NVIRT_CHAN;
4393         }
4394
4395         /*
4396          * Do we support random deletion and addition of logical
4397          * drives
4398          */
4399         adapter->read_ldidmap = 0;      /* set it after first logdrv
4400                                                    delete cmd */
4401         adapter->support_random_del = mega_support_random_del(adapter);
4402
4403         /* Initialize SCBs */
4404         if (mega_init_scb(adapter))
4405                 goto out_free_mbox;
4406
4407         /*
4408          * Reset the pending commands counter
4409          */
4410         atomic_set(&adapter->pend_cmds, 0);
4411
4412         /*
4413          * Reset the adapter quiescent flag
4414          */
4415         atomic_set(&adapter->quiescent, 0);
4416
4417         hba_soft_state[hba_count] = adapter;
4418
4419         /*
4420          * Fill in the structure which needs to be passed back to the
4421          * application when it does an ioctl() for controller related
4422          * information.
4423          */
4424         i = hba_count;
4425
4426         mcontroller[i].base = mega_baseport;
4427         mcontroller[i].irq = irq;
4428         mcontroller[i].numldrv = adapter->numldrv;
4429         mcontroller[i].pcibus = pci_bus;
4430         mcontroller[i].pcidev = id->device;
4431         mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
4432         mcontroller[i].pciid = -1;
4433         mcontroller[i].pcivendor = id->vendor;
4434         mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
4435         mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;
4436
4437
4438         /* Set the Mode of addressing to 64 bit if we can */
4439         if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
4440                 dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
4441                 adapter->has_64bit_addr = 1;
4442         } else  {
4443                 dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
4444                 adapter->has_64bit_addr = 0;
4445         }
4446
4447         mutex_init(&adapter->int_mtx);
4448         init_completion(&adapter->int_waitq);
4449
4450         adapter->this_id = DEFAULT_INITIATOR_ID;
4451         adapter->host->this_id = DEFAULT_INITIATOR_ID;
4452
4453 #if MEGA_HAVE_CLUSTERING
4454         /*
4455          * Is cluster support enabled on this controller
4456          * Note: In a cluster the HBAs ( the initiators ) will have
4457          * different target IDs and we cannot assume it to be 7. Call
4458          * to mega_support_cluster() will get the target ids also if
4459          * the cluster support is available
4460          */
4461         adapter->has_cluster = mega_support_cluster(adapter);
4462         if (adapter->has_cluster) {
4463                 dev_notice(&pdev->dev,
4464                         "Cluster driver, initiator id:%d\n",
4465                         adapter->this_id);
4466         }
4467 #endif
4468
4469         pci_set_drvdata(pdev, host);
4470
4471         mega_create_proc_entry(hba_count, mega_proc_dir_entry);
4472
4473         error = scsi_add_host(host, &pdev->dev);
4474         if (error)
4475                 goto out_free_mbox;
4476
4477         scsi_scan_host(host);
4478         hba_count++;
4479         return 0;
4480
4481  out_free_mbox:
4482         dma_free_coherent(&adapter->dev->dev, sizeof(mbox64_t),
4483                           adapter->una_mbox64, adapter->una_mbox64_dma);
4484  out_free_irq:
4485         free_irq(adapter->host->irq, adapter);
4486  out_free_scb_list:
4487         kfree(adapter->scb_list);
4488  out_free_cmd_buffer:
4489         dma_free_coherent(&adapter->dev->dev, MEGA_BUFFER_SIZE,
4490                           adapter->mega_buffer, adapter->buf_dma_handle);
4491  out_host_put:
4492         scsi_host_put(host);
4493  out_iounmap:
4494         if (flag & BOARD_MEMMAP)
4495                 iounmap((void *)mega_baseport);
4496  out_release_region:
4497         if (flag & BOARD_MEMMAP)
4498                 release_mem_region(tbase, 128);
4499         else
4500                 release_region(mega_baseport, 16);
4501  out_disable_device:
4502         pci_disable_device(pdev);
4503  out:
4504         return error;
4505 }
4506
4507 static void
4508 __megaraid_shutdown(adapter_t *adapter)
4509 {
4510         u_char  raw_mbox[sizeof(struct mbox_out)];
4511         mbox_t  *mbox = (mbox_t *)raw_mbox;
4512         int     i;
4513
4514         /* Flush adapter cache */
4515         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4516         raw_mbox[0] = FLUSH_ADAPTER;
4517
4518         free_irq(adapter->host->irq, adapter);
4519
4520         /* Issue a blocking (interrupts disabled) command to the card */
4521         issue_scb_block(adapter, raw_mbox);
4522
4523         /* Flush disks cache */
4524         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4525         raw_mbox[0] = FLUSH_SYSTEM;
4526
4527         /* Issue a blocking (interrupts disabled) command to the card */
4528         issue_scb_block(adapter, raw_mbox);
4529
4530         if (atomic_read(&adapter->pend_cmds) > 0)
4531                 dev_warn(&adapter->dev->dev, "pending commands!!\n");
4532
4533         /*
4534          * Have a delibrate delay to make sure all the caches are
4535          * actually flushed.
4536          */
4537         for (i = 0; i <= 10; i++)
4538                 mdelay(1000);
4539 }
4540
4541 static void
4542 megaraid_remove_one(struct pci_dev *pdev)
4543 {
4544         struct Scsi_Host *host = pci_get_drvdata(pdev);
4545         adapter_t *adapter = (adapter_t *)host->hostdata;
4546         char buf[12] = { 0 };
4547
4548         scsi_remove_host(host);
4549
4550         __megaraid_shutdown(adapter);
4551
4552         /* Free our resources */
4553         if (adapter->flag & BOARD_MEMMAP) {
4554                 iounmap((void *)adapter->base);
4555                 release_mem_region(adapter->host->base, 128);
4556         } else
4557                 release_region(adapter->base, 16);
4558
4559         mega_free_sgl(adapter);
4560
4561         sprintf(buf, "hba%d", adapter->host->host_no);
4562         remove_proc_subtree(buf, mega_proc_dir_entry);
4563
4564         dma_free_coherent(&adapter->dev->dev, MEGA_BUFFER_SIZE,
4565                           adapter->mega_buffer, adapter->buf_dma_handle);
4566         kfree(adapter->scb_list);
4567         dma_free_coherent(&adapter->dev->dev, sizeof(mbox64_t),
4568                           adapter->una_mbox64, adapter->una_mbox64_dma);
4569
4570         scsi_host_put(host);
4571         pci_disable_device(pdev);
4572
4573         hba_count--;
4574 }
4575
4576 static void
4577 megaraid_shutdown(struct pci_dev *pdev)
4578 {
4579         struct Scsi_Host *host = pci_get_drvdata(pdev);
4580         adapter_t *adapter = (adapter_t *)host->hostdata;
4581
4582         __megaraid_shutdown(adapter);
4583 }
4584
4585 static struct pci_device_id megaraid_pci_tbl[] = {
4586         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID,
4587                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4588         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2,
4589                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4590         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3,
4591                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4592         {0,}
4593 };
4594 MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl);
4595
4596 static struct pci_driver megaraid_pci_driver = {
4597         .name           = "megaraid_legacy",
4598         .id_table       = megaraid_pci_tbl,
4599         .probe          = megaraid_probe_one,
4600         .remove         = megaraid_remove_one,
4601         .shutdown       = megaraid_shutdown,
4602 };
4603
4604 static int __init megaraid_init(void)
4605 {
4606         int error;
4607
4608         if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN))
4609                 max_cmd_per_lun = MAX_CMD_PER_LUN;
4610         if (max_mbox_busy_wait > MBOX_BUSY_WAIT)
4611                 max_mbox_busy_wait = MBOX_BUSY_WAIT;
4612
4613 #ifdef CONFIG_PROC_FS
4614         mega_proc_dir_entry = proc_mkdir("megaraid", NULL);
4615         if (!mega_proc_dir_entry) {
4616                 printk(KERN_WARNING
4617                                 "megaraid: failed to create megaraid root\n");
4618         }
4619 #endif
4620         error = pci_register_driver(&megaraid_pci_driver);
4621         if (error) {
4622 #ifdef CONFIG_PROC_FS
4623                 remove_proc_entry("megaraid", NULL);
4624 #endif
4625                 return error;
4626         }
4627
4628         /*
4629          * Register the driver as a character device, for applications
4630          * to access it for ioctls.
4631          * First argument (major) to register_chrdev implies a dynamic
4632          * major number allocation.
4633          */
4634         major = register_chrdev(0, "megadev_legacy", &megadev_fops);
4635         if (!major) {
4636                 printk(KERN_WARNING
4637                                 "megaraid: failed to register char device\n");
4638         }
4639
4640         return 0;
4641 }
4642
4643 static void __exit megaraid_exit(void)
4644 {
4645         /*
4646          * Unregister the character device interface to the driver.
4647          */
4648         unregister_chrdev(major, "megadev_legacy");
4649
4650         pci_unregister_driver(&megaraid_pci_driver);
4651
4652 #ifdef CONFIG_PROC_FS
4653         remove_proc_entry("megaraid", NULL);
4654 #endif
4655 }
4656
4657 module_init(megaraid_init);
4658 module_exit(megaraid_exit);
4659
4660 /* vi: set ts=8 sw=8 tw=78: */