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 = pci_alloc_consistent(adapter->dev,
 137                         sizeof(mbox64_t), &adapter->una_mbox64_dma);
 138
 139         if( !adapter->una_mbox64 ) return -1;
 140
 141         adapter->mbox = &adapter->una_mbox64->mbox;
 142
 143         adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) &
 144                         (~0UL ^ 0xFUL));
 145
 146         adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8);
 147
 148         align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox);
 149
 150         adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align;
 151
 152         /*
 153          * Register the mailbox if the controller is an io-mapped controller
 154          */
 155         if( adapter->flag & BOARD_IOMAP ) {
 156
 157                 outb(adapter->mbox_dma & 0xFF,
 158                                 adapter->host->io_port + MBOX_PORT0);
 159
 160                 outb((adapter->mbox_dma >> 8) & 0xFF,
 161                                 adapter->host->io_port + MBOX_PORT1);
 162
 163                 outb((adapter->mbox_dma >> 16) & 0xFF,
 164                                 adapter->host->io_port + MBOX_PORT2);
 165
 166                 outb((adapter->mbox_dma >> 24) & 0xFF,
 167                                 adapter->host->io_port + MBOX_PORT3);
 168
 169                 outb(ENABLE_MBOX_BYTE,
 170                                 adapter->host->io_port + ENABLE_MBOX_REGION);
 171
 172                 irq_ack(adapter);
 173
 174                 irq_enable(adapter);
 175         }
 176
 177         return 0;
 178 }
 179
 180
 181 /*
 182  * mega_query_adapter()
 183  * @adapter - pointer to our soft state
 184  *
 185  * Issue the adapter inquiry commands to the controller and find out
 186  * information and parameter about the devices attached
 187  */
 188 static int
 189 mega_query_adapter(adapter_t *adapter)
 190 {
 191         dma_addr_t      prod_info_dma_handle;
 192         mega_inquiry3   *inquiry3;
 193         u8      raw_mbox[sizeof(struct mbox_out)];
 194         mbox_t  *mbox;
 195         int     retval;
 196
 197         /* Initialize adapter inquiry mailbox */
 198
 199         mbox = (mbox_t *)raw_mbox;
 200
 201         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
 202         memset(&mbox->m_out, 0, sizeof(raw_mbox));
 203
 204         /*
 205          * Try to issue Inquiry3 command
 206          * if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
 207          * update enquiry3 structure
 208          */
 209         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
 210
 211         inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;
 212
 213         raw_mbox[0] = FC_NEW_CONFIG;            /* i.e. mbox->cmd=0xA1 */
 214         raw_mbox[2] = NC_SUBOP_ENQUIRY3;        /* i.e. 0x0F */
 215         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;  /* i.e. 0x02 */
 216
 217         /* Issue a blocking command to the card */
 218         if ((retval = issue_scb_block(adapter, raw_mbox))) {
 219                 /* the adapter does not support 40ld */
 220
 221                 mraid_ext_inquiry       *ext_inq;
 222                 mraid_inquiry           *inq;
 223                 dma_addr_t              dma_handle;
 224
 225                 ext_inq = pci_alloc_consistent(adapter->dev,
 226                                 sizeof(mraid_ext_inquiry), &dma_handle);
 227
 228                 if( ext_inq == NULL ) return -1;
 229
 230                 inq = &ext_inq->raid_inq;
 231
 232                 mbox->m_out.xferaddr = (u32)dma_handle;
 233
 234                 /*issue old 0x04 command to adapter */
 235                 mbox->m_out.cmd = MEGA_MBOXCMD_ADPEXTINQ;
 236
 237                 issue_scb_block(adapter, raw_mbox);
 238
 239                 /*
 240                  * update Enquiry3 and ProductInfo structures with
 241                  * mraid_inquiry structure
 242                  */
 243                 mega_8_to_40ld(inq, inquiry3,
 244                                 (mega_product_info *)&adapter->product_info);
 245
 246                 pci_free_consistent(adapter->dev, sizeof(mraid_ext_inquiry),
 247                                 ext_inq, dma_handle);
 248
 249         } else {                /*adapter supports 40ld */
 250                 adapter->flag |= BOARD_40LD;
 251
 252                 /*
 253                  * get product_info, which is static information and will be
 254                  * unchanged
 255                  */
 256                 prod_info_dma_handle = pci_map_single(adapter->dev, (void *)
 257                                 &adapter->product_info,
 258                                 sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
 259
 260                 mbox->m_out.xferaddr = prod_info_dma_handle;
 261
 262                 raw_mbox[0] = FC_NEW_CONFIG;    /* i.e. mbox->cmd=0xA1 */
 263                 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;    /* i.e. 0x0E */
 264
 265                 if ((retval = issue_scb_block(adapter, raw_mbox)))
 266                         dev_warn(&adapter->dev->dev,
 267                                 "Product_info cmd failed with error: %d\n",
 268                                 retval);
 269
 270                 pci_unmap_single(adapter->dev, prod_info_dma_handle,
 271                                 sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
 272         }
 273
 274
 275         /*
 276          * kernel scans the channels from 0 to <= max_channel
 277          */
 278         adapter->host->max_channel =
 279                 adapter->product_info.nchannels + NVIRT_CHAN -1;
 280
 281         adapter->host->max_id = 16;     /* max targets per channel */
 282
 283         adapter->host->max_lun = 7;     /* Up to 7 luns for non disk devices */
 284
 285         adapter->host->cmd_per_lun = max_cmd_per_lun;
 286
 287         adapter->numldrv = inquiry3->num_ldrv;
 288
 289         adapter->max_cmds = adapter->product_info.max_commands;
 290
 291         if(adapter->max_cmds > MAX_COMMANDS)
 292                 adapter->max_cmds = MAX_COMMANDS;
 293
 294         adapter->host->can_queue = adapter->max_cmds - 1;
 295
 296         /*
 297          * Get the maximum number of scatter-gather elements supported by this
 298          * firmware
 299          */
 300         mega_get_max_sgl(adapter);
 301
 302         adapter->host->sg_tablesize = adapter->sglen;
 303
 304         /* use HP firmware and bios version encoding
 305            Note: fw_version[0|1] and bios_version[0|1] were originally shifted
 306            right 8 bits making them zero. This 0 value was hardcoded to fix
 307            sparse warnings. */
 308         if (adapter->product_info.subsysvid == PCI_VENDOR_ID_HP) {
 309                 snprintf(adapter->fw_version, sizeof(adapter->fw_version),
 310                          "%c%d%d.%d%d",
 311                          adapter->product_info.fw_version[2],
 312                          0,
 313                          adapter->product_info.fw_version[1] & 0x0f,
 314                          0,
 315                          adapter->product_info.fw_version[0] & 0x0f);
 316                 snprintf(adapter->bios_version, sizeof(adapter->fw_version),
 317                          "%c%d%d.%d%d",
 318                          adapter->product_info.bios_version[2],
 319                          0,
 320                          adapter->product_info.bios_version[1] & 0x0f,
 321                          0,
 322                          adapter->product_info.bios_version[0] & 0x0f);
 323         } else {
 324                 memcpy(adapter->fw_version,
 325                                 (char *)adapter->product_info.fw_version, 4);
 326                 adapter->fw_version[4] = 0;
 327
 328                 memcpy(adapter->bios_version,
 329                                 (char *)adapter->product_info.bios_version, 4);
 330
 331                 adapter->bios_version[4] = 0;
 332         }
 333
 334         dev_notice(&adapter->dev->dev, "[%s:%s] detected %d logical drives\n",
 335                 adapter->fw_version, adapter->bios_version, adapter->numldrv);
 336
 337         /*
 338          * Do we support extended (>10 bytes) cdbs
 339          */
 340         adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
 341         if (adapter->support_ext_cdb)
 342                 dev_notice(&adapter->dev->dev, "supports extended CDBs\n");
 343
 344
 345         return 0;
 346 }
 347
 348 /**
 349  * mega_runpendq()
 350  * @adapter - pointer to our soft state
 351  *
 352  * Runs through the list of pending requests.
 353  */
 354 static inline void
 355 mega_runpendq(adapter_t *adapter)
 356 {
 357         if(!list_empty(&adapter->pending_list))
 358                 __mega_runpendq(adapter);
 359 }
 360
 361 /*
 362  * megaraid_queue()
 363  * @scmd - Issue this scsi command
 364  * @done - the callback hook into the scsi mid-layer
 365  *
 366  * The command queuing entry point for the mid-layer.
 367  */
 368 static int
 369 megaraid_queue_lck(struct scsi_cmnd *scmd, void (*done)(struct scsi_cmnd *))
 370 {
 371         adapter_t       *adapter;
 372         scb_t   *scb;
 373         int     busy=0;
 374         unsigned long flags;
 375
 376         adapter = (adapter_t *)scmd->device->host->hostdata;
 377
 378         scmd->scsi_done = done;
 379
 380
 381         /*
 382          * Allocate and build a SCB request
 383          * busy flag will be set if mega_build_cmd() command could not
 384          * allocate scb. We will return non-zero status in that case.
 385          * NOTE: scb can be null even though certain commands completed
 386          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, we would
 387          * return 0 in that case.
 388          */
 389
 390         spin_lock_irqsave(&adapter->lock, flags);
 391         scb = mega_build_cmd(adapter, scmd, &busy);
 392         if (!scb)
 393                 goto out;
 394
 395         scb->state |= SCB_PENDQ;
 396         list_add_tail(&scb->list, &adapter->pending_list);
 397
 398         /*
 399          * Check if the HBA is in quiescent state, e.g., during a
 400          * delete logical drive opertion. If it is, don't run
 401          * the pending_list.
 402          */
 403         if (atomic_read(&adapter->quiescent) == 0)
 404                 mega_runpendq(adapter);
 405
 406         busy = 0;
 407  out:
 408         spin_unlock_irqrestore(&adapter->lock, flags);
 409         return busy;
 410 }
 411
 412 static DEF_SCSI_QCMD(megaraid_queue)
 413
 414 /**
 415  * mega_allocate_scb()
 416  * @adapter - pointer to our soft state
 417  * @cmd - scsi command from the mid-layer
 418  *
 419  * Allocate a SCB structure. This is the central structure for controller
 420  * commands.
 421  */
 422 static inline scb_t *
 423 mega_allocate_scb(adapter_t *adapter, struct scsi_cmnd *cmd)
 424 {
 425         struct list_head *head = &adapter->free_list;
 426         scb_t   *scb;
 427
 428         /* Unlink command from Free List */
 429         if( !list_empty(head) ) {
 430
 431                 scb = list_entry(head->next, scb_t, list);
 432
 433                 list_del_init(head->next);
 434
 435                 scb->state = SCB_ACTIVE;
 436                 scb->cmd = cmd;
 437                 scb->dma_type = MEGA_DMA_TYPE_NONE;
 438
 439                 return scb;
 440         }
 441
 442         return NULL;
 443 }
 444
 445 /**
 446  * mega_get_ldrv_num()
 447  * @adapter - pointer to our soft state
 448  * @cmd - scsi mid layer command
 449  * @channel - channel on the controller
 450  *
 451  * Calculate the logical drive number based on the information in scsi command
 452  * and the channel number.
 453  */
 454 static inline int
 455 mega_get_ldrv_num(adapter_t *adapter, struct scsi_cmnd *cmd, int channel)
 456 {
 457         int             tgt;
 458         int             ldrv_num;
 459
 460         tgt = cmd->device->id;
 461
 462         if ( tgt > adapter->this_id )
 463                 tgt--;  /* we do not get inquires for initiator id */
 464
 465         ldrv_num = (channel * 15) + tgt;
 466
 467
 468         /*
 469          * If we have a logical drive with boot enabled, project it first
 470          */
 471         if( adapter->boot_ldrv_enabled ) {
 472                 if( ldrv_num == 0 ) {
 473                         ldrv_num = adapter->boot_ldrv;
 474                 }
 475                 else {
 476                         if( ldrv_num <= adapter->boot_ldrv ) {
 477                                 ldrv_num--;
 478                         }
 479                 }
 480         }
 481
 482         /*
 483          * If "delete logical drive" feature is enabled on this controller.
 484          * Do only if at least one delete logical drive operation was done.
 485          *
 486          * Also, after logical drive deletion, instead of logical drive number,
 487          * the value returned should be 0x80+logical drive id.
 488          *
 489          * These is valid only for IO commands.
 490          */
 491
 492         if (adapter->support_random_del && adapter->read_ldidmap )
 493                 switch (cmd->cmnd[0]) {
 494                 case READ_6:    /* fall through */
 495                 case WRITE_6:   /* fall through */
 496                 case READ_10:   /* fall through */
 497                 case WRITE_10:
 498                         ldrv_num += 0x80;
 499                 }
 500
 501         return ldrv_num;
 502 }
 503
 504 /**
 505  * mega_build_cmd()
 506  * @adapter - pointer to our soft state
 507  * @cmd - Prepare using this scsi command
 508  * @busy - busy flag if no resources
 509  *
 510  * Prepares a command and scatter gather list for the controller. This routine
 511  * also finds out if the commands is intended for a logical drive or a
 512  * physical device and prepares the controller command accordingly.
 513  *
 514  * We also re-order the logical drives and physical devices based on their
 515  * boot settings.
 516  */
 517 static scb_t *
 518 mega_build_cmd(adapter_t *adapter, struct scsi_cmnd *cmd, int *busy)
 519 {
 520         mega_ext_passthru       *epthru;
 521         mega_passthru   *pthru;
 522         scb_t   *scb;
 523         mbox_t  *mbox;
 524         u32     seg;
 525         char    islogical;
 526         int     max_ldrv_num;
 527         int     channel = 0;
 528         int     target = 0;
 529         int     ldrv_num = 0;   /* logical drive number */
 530
 531         /*
 532          * We know what channels our logical drives are on - mega_find_card()
 533          */
 534         islogical = adapter->logdrv_chan[cmd->device->channel];
 535
 536         /*
 537          * The theory: If physical drive is chosen for boot, all the physical
 538          * devices are exported before the logical drives, otherwise physical
 539          * devices are pushed after logical drives, in which case - Kernel sees
 540          * the physical devices on virtual channel which is obviously converted
 541          * to actual channel on the HBA.
 542          */
 543         if( adapter->boot_pdrv_enabled ) {
 544                 if( islogical ) {
 545                         /* logical channel */
 546                         channel = cmd->device->channel -
 547                                 adapter->product_info.nchannels;
 548                 }
 549                 else {
 550                         /* this is physical channel */
 551                         channel = cmd->device->channel;
 552                         target = cmd->device->id;
 553
 554                         /*
 555                          * boot from a physical disk, that disk needs to be
 556                          * exposed first IF both the channels are SCSI, then
 557                          * booting from the second channel is not allowed.
 558                          */
 559                         if( target == 0 ) {
 560                                 target = adapter->boot_pdrv_tgt;
 561                         }
 562                         else if( target == adapter->boot_pdrv_tgt ) {
 563                                 target = 0;
 564                         }
 565                 }
 566         }
 567         else {
 568                 if( islogical ) {
 569                         /* this is the logical channel */
 570                         channel = cmd->device->channel;
 571                 }
 572                 else {
 573                         /* physical channel */
 574                         channel = cmd->device->channel - NVIRT_CHAN;
 575                         target = cmd->device->id;
 576                 }
 577         }
 578
 579
 580         if(islogical) {
 581
 582                 /* have just LUN 0 for each target on virtual channels */
 583                 if (cmd->device->lun) {
 584                         cmd->result = (DID_BAD_TARGET << 16);
 585                         cmd->scsi_done(cmd);
 586                         return NULL;
 587                 }
 588
 589                 ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);
 590
 591
 592                 max_ldrv_num = (adapter->flag & BOARD_40LD) ?
 593                         MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;
 594
 595                 /*
 596                  * max_ldrv_num increases by 0x80 if some logical drive was
 597                  * deleted.
 598                  */
 599                 if(adapter->read_ldidmap)
 600                         max_ldrv_num += 0x80;
 601
 602                 if(ldrv_num > max_ldrv_num ) {
 603                         cmd->result = (DID_BAD_TARGET << 16);
 604                         cmd->scsi_done(cmd);
 605                         return NULL;
 606                 }
 607
 608         }
 609         else {
 610                 if( cmd->device->lun > 7) {
 611                         /*
 612                          * Do not support lun >7 for physically accessed
 613                          * devices
 614                          */
 615                         cmd->result = (DID_BAD_TARGET << 16);
 616                         cmd->scsi_done(cmd);
 617                         return NULL;
 618                 }
 619         }
 620
 621         /*
 622          *
 623          * Logical drive commands
 624          *
 625          */
 626         if(islogical) {
 627                 switch (cmd->cmnd[0]) {
 628                 case TEST_UNIT_READY:
 629 #if MEGA_HAVE_CLUSTERING
 630                         /*
 631                          * Do we support clustering and is the support enabled
 632                          * If no, return success always
 633                          */
 634                         if( !adapter->has_cluster ) {
 635                                 cmd->result = (DID_OK << 16);
 636                                 cmd->scsi_done(cmd);
 637                                 return NULL;
 638                         }
 639
 640                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 641                                 *busy = 1;
 642                                 return NULL;
 643                         }
 644
 645                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 646                         scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
 647                         scb->raw_mbox[3] = ldrv_num;
 648
 649                         scb->dma_direction = PCI_DMA_NONE;
 650
 651                         return scb;
 652 #else
 653                         cmd->result = (DID_OK << 16);
 654                         cmd->scsi_done(cmd);
 655                         return NULL;
 656 #endif
 657
 658                 case MODE_SENSE: {
 659                         char *buf;
 660                         struct scatterlist *sg;
 661
 662                         sg = scsi_sglist(cmd);
 663                         buf = kmap_atomic(sg_page(sg)) + sg->offset;
 664
 665                         memset(buf, 0, cmd->cmnd[4]);
 666                         kunmap_atomic(buf - sg->offset);
 667
 668                         cmd->result = (DID_OK << 16);
 669                         cmd->scsi_done(cmd);
 670                         return NULL;
 671                 }
 672
 673                 case READ_CAPACITY:
 674                 case INQUIRY:
 675
 676                         if(!(adapter->flag & (1L << cmd->device->channel))) {
 677
 678                                 dev_notice(&adapter->dev->dev,
 679                                         "scsi%d: scanning scsi channel %d "
 680                                         "for logical drives\n",
 681                                                 adapter->host->host_no,
 682                                                 cmd->device->channel);
 683
 684                                 adapter->flag |= (1L << cmd->device->channel);
 685                         }
 686
 687                         /* Allocate a SCB and initialize passthru */
 688                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 689                                 *busy = 1;
 690                                 return NULL;
 691                         }
 692                         pthru = scb->pthru;
 693
 694                         mbox = (mbox_t *)scb->raw_mbox;
 695                         memset(mbox, 0, sizeof(scb->raw_mbox));
 696                         memset(pthru, 0, sizeof(mega_passthru));
 697
 698                         pthru->timeout = 0;
 699                         pthru->ars = 1;
 700                         pthru->reqsenselen = 14;
 701                         pthru->islogical = 1;
 702                         pthru->logdrv = ldrv_num;
 703                         pthru->cdblen = cmd->cmd_len;
 704                         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 705
 706                         if( adapter->has_64bit_addr ) {
 707                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 708                         }
 709                         else {
 710                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 711                         }
 712
 713                         scb->dma_direction = PCI_DMA_FROMDEVICE;
 714
 715                         pthru->numsgelements = mega_build_sglist(adapter, scb,
 716                                 &pthru->dataxferaddr, &pthru->dataxferlen);
 717
 718                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 719
 720                         return scb;
 721
 722                 case READ_6:
 723                 case WRITE_6:
 724                 case READ_10:
 725                 case WRITE_10:
 726                 case READ_12:
 727                 case WRITE_12:
 728
 729                         /* Allocate a SCB and initialize mailbox */
 730                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 731                                 *busy = 1;
 732                                 return NULL;
 733                         }
 734                         mbox = (mbox_t *)scb->raw_mbox;
 735
 736                         memset(mbox, 0, sizeof(scb->raw_mbox));
 737                         mbox->m_out.logdrv = ldrv_num;
 738
 739                         /*
 740                          * A little hack: 2nd bit is zero for all scsi read
 741                          * commands and is set for all scsi write commands
 742                          */
 743                         if( adapter->has_64bit_addr ) {
 744                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 745                                         MEGA_MBOXCMD_LWRITE64:
 746                                         MEGA_MBOXCMD_LREAD64 ;
 747                         }
 748                         else {
 749                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 750                                         MEGA_MBOXCMD_LWRITE:
 751                                         MEGA_MBOXCMD_LREAD ;
 752                         }
 753
 754                         /*
 755                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
 756                          */
 757                         if( cmd->cmd_len == 6 ) {
 758                                 mbox->m_out.numsectors = (u32) cmd->cmnd[4];
 759                                 mbox->m_out.lba =
 760                                         ((u32)cmd->cmnd[1] << 16) |
 761                                         ((u32)cmd->cmnd[2] << 8) |
 762                                         (u32)cmd->cmnd[3];
 763
 764                                 mbox->m_out.lba &= 0x1FFFFF;
 765
 766 #if MEGA_HAVE_STATS
 767                                 /*
 768                                  * Take modulo 0x80, since the logical drive
 769                                  * number increases by 0x80 when a logical
 770                                  * drive was deleted
 771                                  */
 772                                 if (*cmd->cmnd == READ_6) {
 773                                         adapter->nreads[ldrv_num%0x80]++;
 774                                         adapter->nreadblocks[ldrv_num%0x80] +=
 775                                                 mbox->m_out.numsectors;
 776                                 } else {
 777                                         adapter->nwrites[ldrv_num%0x80]++;
 778                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 779                                                 mbox->m_out.numsectors;
 780                                 }
 781 #endif
 782                         }
 783
 784                         /*
 785                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
 786                          */
 787                         if( cmd->cmd_len == 10 ) {
 788                                 mbox->m_out.numsectors =
 789                                         (u32)cmd->cmnd[8] |
 790                                         ((u32)cmd->cmnd[7] << 8);
 791                                 mbox->m_out.lba =
 792                                         ((u32)cmd->cmnd[2] << 24) |
 793                                         ((u32)cmd->cmnd[3] << 16) |
 794                                         ((u32)cmd->cmnd[4] << 8) |
 795                                         (u32)cmd->cmnd[5];
 796
 797 #if MEGA_HAVE_STATS
 798                                 if (*cmd->cmnd == READ_10) {
 799                                         adapter->nreads[ldrv_num%0x80]++;
 800                                         adapter->nreadblocks[ldrv_num%0x80] +=
 801                                                 mbox->m_out.numsectors;
 802                                 } else {
 803                                         adapter->nwrites[ldrv_num%0x80]++;
 804                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 805                                                 mbox->m_out.numsectors;
 806                                 }
 807 #endif
 808                         }
 809
 810                         /*
 811                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
 812                          */
 813                         if( cmd->cmd_len == 12 ) {
 814                                 mbox->m_out.lba =
 815                                         ((u32)cmd->cmnd[2] << 24) |
 816                                         ((u32)cmd->cmnd[3] << 16) |
 817                                         ((u32)cmd->cmnd[4] << 8) |
 818                                         (u32)cmd->cmnd[5];
 819
 820                                 mbox->m_out.numsectors =
 821                                         ((u32)cmd->cmnd[6] << 24) |
 822                                         ((u32)cmd->cmnd[7] << 16) |
 823                                         ((u32)cmd->cmnd[8] << 8) |
 824                                         (u32)cmd->cmnd[9];
 825
 826 #if MEGA_HAVE_STATS
 827                                 if (*cmd->cmnd == READ_12) {
 828                                         adapter->nreads[ldrv_num%0x80]++;
 829                                         adapter->nreadblocks[ldrv_num%0x80] +=
 830                                                 mbox->m_out.numsectors;
 831                                 } else {
 832                                         adapter->nwrites[ldrv_num%0x80]++;
 833                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 834                                                 mbox->m_out.numsectors;
 835                                 }
 836 #endif
 837                         }
 838
 839                         /*
 840                          * If it is a read command
 841                          */
 842                         if( (*cmd->cmnd & 0x0F) == 0x08 ) {
 843                                 scb->dma_direction = PCI_DMA_FROMDEVICE;
 844                         }
 845                         else {
 846                                 scb->dma_direction = PCI_DMA_TODEVICE;
 847                         }
 848
 849                         /* Calculate Scatter-Gather info */
 850                         mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
 851                                         (u32 *)&mbox->m_out.xferaddr, &seg);
 852
 853                         return scb;
 854
 855 #if MEGA_HAVE_CLUSTERING
 856                 case RESERVE:   /* Fall through */
 857                 case RELEASE:
 858
 859                         /*
 860                          * Do we support clustering and is the support enabled
 861                          */
 862                         if( ! adapter->has_cluster ) {
 863
 864                                 cmd->result = (DID_BAD_TARGET << 16);
 865                                 cmd->scsi_done(cmd);
 866                                 return NULL;
 867                         }
 868
 869                         /* Allocate a SCB and initialize mailbox */
 870                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 871                                 *busy = 1;
 872                                 return NULL;
 873                         }
 874
 875                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 876                         scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
 877                                 MEGA_RESERVE_LD : MEGA_RELEASE_LD;
 878
 879                         scb->raw_mbox[3] = ldrv_num;
 880
 881                         scb->dma_direction = PCI_DMA_NONE;
 882
 883                         return scb;
 884 #endif
 885
 886                 default:
 887                         cmd->result = (DID_BAD_TARGET << 16);
 888                         cmd->scsi_done(cmd);
 889                         return NULL;
 890                 }
 891         }
 892
 893         /*
 894          * Passthru drive commands
 895          */
 896         else {
 897                 /* Allocate a SCB and initialize passthru */
 898                 if(!(scb = mega_allocate_scb(adapter, cmd))) {
 899                         *busy = 1;
 900                         return NULL;
 901                 }
 902
 903                 mbox = (mbox_t *)scb->raw_mbox;
 904                 memset(mbox, 0, sizeof(scb->raw_mbox));
 905
 906                 if( adapter->support_ext_cdb ) {
 907
 908                         epthru = mega_prepare_extpassthru(adapter, scb, cmd,
 909                                         channel, target);
 910
 911                         mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;
 912
 913                         mbox->m_out.xferaddr = scb->epthru_dma_addr;
 914
 915                 }
 916                 else {
 917
 918                         pthru = mega_prepare_passthru(adapter, scb, cmd,
 919                                         channel, target);
 920
 921                         /* Initialize mailbox */
 922                         if( adapter->has_64bit_addr ) {
 923                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 924                         }
 925                         else {
 926                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 927                         }
 928
 929                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 930
 931                 }
 932                 return scb;
 933         }
 934         return NULL;
 935 }
 936
 937
 938 /**
 939  * mega_prepare_passthru()
 940  * @adapter - pointer to our soft state
 941  * @scb - our scsi control block
 942  * @cmd - scsi command from the mid-layer
 943  * @channel - actual channel on the controller
 944  * @target - actual id on the controller.
 945  *
 946  * prepare a command for the scsi physical devices.
 947  */
 948 static mega_passthru *
 949 mega_prepare_passthru(adapter_t *adapter, scb_t *scb, struct scsi_cmnd *cmd,
 950                       int channel, int target)
 951 {
 952         mega_passthru *pthru;
 953
 954         pthru = scb->pthru;
 955         memset(pthru, 0, sizeof (mega_passthru));
 956
 957         /* 0=6sec/1=60sec/2=10min/3=3hrs */
 958         pthru->timeout = 2;
 959
 960         pthru->ars = 1;
 961         pthru->reqsenselen = 14;
 962         pthru->islogical = 0;
 963
 964         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
 965
 966         pthru->target = (adapter->flag & BOARD_40LD) ?
 967                 (channel << 4) | target : target;
 968
 969         pthru->cdblen = cmd->cmd_len;
 970         pthru->logdrv = cmd->device->lun;
 971
 972         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 973
 974         /* Not sure about the direction */
 975         scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
 976
 977         /* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
 978         switch (cmd->cmnd[0]) {
 979         case INQUIRY:
 980         case READ_CAPACITY:
 981                 if(!(adapter->flag & (1L << cmd->device->channel))) {
 982
 983                         dev_notice(&adapter->dev->dev,
 984                                 "scsi%d: scanning scsi channel %d [P%d] "
 985                                 "for physical devices\n",
 986                                         adapter->host->host_no,
 987                                         cmd->device->channel, channel);
 988
 989                         adapter->flag |= (1L << cmd->device->channel);
 990                 }
 991                 /* Fall through */
 992         default:
 993                 pthru->numsgelements = mega_build_sglist(adapter, scb,
 994                                 &pthru->dataxferaddr, &pthru->dataxferlen);
 995                 break;
 996         }
 997         return pthru;
 998 }
 999
1000
1001 /**
1002  * mega_prepare_extpassthru()
1003  * @adapter - pointer to our soft state
1004  * @scb - our scsi control block
1005  * @cmd - scsi command from the mid-layer
1006  * @channel - actual channel on the controller
1007  * @target - actual id on the controller.
1008  *
1009  * prepare a command for the scsi physical devices. This rountine prepares
1010  * commands for devices which can take extended CDBs (>10 bytes)
1011  */
1012 static mega_ext_passthru *
1013 mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb,
1014                          struct scsi_cmnd *cmd,
1015                          int channel, int target)
1016 {
1017         mega_ext_passthru       *epthru;
1018
1019         epthru = scb->epthru;
1020         memset(epthru, 0, sizeof(mega_ext_passthru));
1021
1022         /* 0=6sec/1=60sec/2=10min/3=3hrs */
1023         epthru->timeout = 2;
1024
1025         epthru->ars = 1;
1026         epthru->reqsenselen = 14;
1027         epthru->islogical = 0;
1028
1029         epthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
1030         epthru->target = (adapter->flag & BOARD_40LD) ?
1031                 (channel << 4) | target : target;
1032
1033         epthru->cdblen = cmd->cmd_len;
1034         epthru->logdrv = cmd->device->lun;
1035
1036         memcpy(epthru->cdb, cmd->cmnd, cmd->cmd_len);
1037
1038         /* Not sure about the direction */
1039         scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
1040
1041         switch(cmd->cmnd[0]) {
1042         case INQUIRY:
1043         case READ_CAPACITY:
1044                 if(!(adapter->flag & (1L << cmd->device->channel))) {
1045
1046                         dev_notice(&adapter->dev->dev,
1047                                 "scsi%d: scanning scsi channel %d [P%d] "
1048                                 "for physical devices\n",
1049                                         adapter->host->host_no,
1050                                         cmd->device->channel, channel);
1051
1052                         adapter->flag |= (1L << cmd->device->channel);
1053                 }
1054                 /* Fall through */
1055         default:
1056                 epthru->numsgelements = mega_build_sglist(adapter, scb,
1057                                 &epthru->dataxferaddr, &epthru->dataxferlen);
1058                 break;
1059         }
1060
1061         return epthru;
1062 }
1063
1064 static void
1065 __mega_runpendq(adapter_t *adapter)
1066 {
1067         scb_t *scb;
1068         struct list_head *pos, *next;
1069
1070         /* Issue any pending commands to the card */
1071         list_for_each_safe(pos, next, &adapter->pending_list) {
1072
1073                 scb = list_entry(pos, scb_t, list);
1074
1075                 if( !(scb->state & SCB_ISSUED) ) {
1076
1077                         if( issue_scb(adapter, scb) != 0 )
1078                                 return;
1079                 }
1080         }
1081
1082         return;
1083 }
1084
1085
1086 /**
1087  * issue_scb()
1088  * @adapter - pointer to our soft state
1089  * @scb - scsi control block
1090  *
1091  * Post a command to the card if the mailbox is available, otherwise return
1092  * busy. We also take the scb from the pending list if the mailbox is
1093  * available.
1094  */
1095 static int
1096 issue_scb(adapter_t *adapter, scb_t *scb)
1097 {
1098         volatile mbox64_t       *mbox64 = adapter->mbox64;
1099         volatile mbox_t         *mbox = adapter->mbox;
1100         unsigned int    i = 0;
1101
1102         if(unlikely(mbox->m_in.busy)) {
1103                 do {
1104                         udelay(1);
1105                         i++;
1106                 } while( mbox->m_in.busy && (i < max_mbox_busy_wait) );
1107
1108                 if(mbox->m_in.busy) return -1;
1109         }
1110
1111         /* Copy mailbox data into host structure */
1112         memcpy((char *)&mbox->m_out, (char *)scb->raw_mbox,
1113                         sizeof(struct mbox_out));
1114
1115         mbox->m_out.cmdid = scb->idx;   /* Set cmdid */
1116         mbox->m_in.busy = 1;            /* Set busy */
1117
1118
1119         /*
1120          * Increment the pending queue counter
1121          */
1122         atomic_inc(&adapter->pend_cmds);
1123
1124         switch (mbox->m_out.cmd) {
1125         case MEGA_MBOXCMD_LREAD64:
1126         case MEGA_MBOXCMD_LWRITE64:
1127         case MEGA_MBOXCMD_PASSTHRU64:
1128         case MEGA_MBOXCMD_EXTPTHRU:
1129                 mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1130                 mbox64->xfer_segment_hi = 0;
1131                 mbox->m_out.xferaddr = 0xFFFFFFFF;
1132                 break;
1133         default:
1134                 mbox64->xfer_segment_lo = 0;
1135                 mbox64->xfer_segment_hi = 0;
1136         }
1137
1138         /*
1139          * post the command
1140          */
1141         scb->state |= SCB_ISSUED;
1142
1143         if( likely(adapter->flag & BOARD_MEMMAP) ) {
1144                 mbox->m_in.poll = 0;
1145                 mbox->m_in.ack = 0;
1146                 WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1147         }
1148         else {
1149                 irq_enable(adapter);
1150                 issue_command(adapter);
1151         }
1152
1153         return 0;
1154 }
1155
1156 /*
1157  * Wait until the controller's mailbox is available
1158  */
1159 static inline int
1160 mega_busywait_mbox (adapter_t *adapter)
1161 {
1162         if (adapter->mbox->m_in.busy)
1163                 return __mega_busywait_mbox(adapter);
1164         return 0;
1165 }
1166
1167 /**
1168  * issue_scb_block()
1169  * @adapter - pointer to our soft state
1170  * @raw_mbox - the mailbox
1171  *
1172  * Issue a scb in synchronous and non-interrupt mode
1173  */
1174 static int
1175 issue_scb_block(adapter_t *adapter, u_char *raw_mbox)
1176 {
1177         volatile mbox64_t *mbox64 = adapter->mbox64;
1178         volatile mbox_t *mbox = adapter->mbox;
1179         u8      byte;
1180
1181         /* Wait until mailbox is free */
1182         if(mega_busywait_mbox (adapter))
1183                 goto bug_blocked_mailbox;
1184
1185         /* Copy mailbox data into host structure */
1186         memcpy((char *) mbox, raw_mbox, sizeof(struct mbox_out));
1187         mbox->m_out.cmdid = 0xFE;
1188         mbox->m_in.busy = 1;
1189
1190         switch (raw_mbox[0]) {
1191         case MEGA_MBOXCMD_LREAD64:
1192         case MEGA_MBOXCMD_LWRITE64:
1193         case MEGA_MBOXCMD_PASSTHRU64:
1194         case MEGA_MBOXCMD_EXTPTHRU:
1195                 mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1196                 mbox64->xfer_segment_hi = 0;
1197                 mbox->m_out.xferaddr = 0xFFFFFFFF;
1198                 break;
1199         default:
1200                 mbox64->xfer_segment_lo = 0;
1201                 mbox64->xfer_segment_hi = 0;
1202         }
1203
1204         if( likely(adapter->flag & BOARD_MEMMAP) ) {
1205                 mbox->m_in.poll = 0;
1206                 mbox->m_in.ack = 0;
1207                 mbox->m_in.numstatus = 0xFF;
1208                 mbox->m_in.status = 0xFF;
1209                 WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1210
1211                 while((volatile u8)mbox->m_in.numstatus == 0xFF)
1212                         cpu_relax();
1213
1214                 mbox->m_in.numstatus = 0xFF;
1215
1216                 while( (volatile u8)mbox->m_in.poll != 0x77 )
1217                         cpu_relax();
1218
1219                 mbox->m_in.poll = 0;
1220                 mbox->m_in.ack = 0x77;
1221
1222                 WRINDOOR(adapter, adapter->mbox_dma | 0x2);
1223
1224                 while(RDINDOOR(adapter) & 0x2)
1225                         cpu_relax();
1226         }
1227         else {
1228                 irq_disable(adapter);
1229                 issue_command(adapter);
1230
1231                 while (!((byte = irq_state(adapter)) & INTR_VALID))
1232                         cpu_relax();
1233
1234                 set_irq_state(adapter, byte);
1235                 irq_enable(adapter);
1236                 irq_ack(adapter);
1237         }
1238
1239         return mbox->m_in.status;
1240
1241 bug_blocked_mailbox:
1242         dev_warn(&adapter->dev->dev, "Blocked mailbox......!!\n");
1243         udelay (1000);
1244         return -1;
1245 }
1246
1247
1248 /**
1249  * megaraid_isr_iomapped()
1250  * @irq - irq
1251  * @devp - pointer to our soft state
1252  *
1253  * Interrupt service routine for io-mapped controllers.
1254  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1255  * and service the completed commands.
1256  */
1257 static irqreturn_t
1258 megaraid_isr_iomapped(int irq, void *devp)
1259 {
1260         adapter_t       *adapter = devp;
1261         unsigned long   flags;
1262         u8      status;
1263         u8      nstatus;
1264         u8      completed[MAX_FIRMWARE_STATUS];
1265         u8      byte;
1266         int     handled = 0;
1267
1268
1269         /*
1270          * loop till F/W has more commands for us to complete.
1271          */
1272         spin_lock_irqsave(&adapter->lock, flags);
1273
1274         do {
1275                 /* Check if a valid interrupt is pending */
1276                 byte = irq_state(adapter);
1277                 if( (byte & VALID_INTR_BYTE) == 0 ) {
1278                         /*
1279                          * No more pending commands
1280                          */
1281                         goto out_unlock;
1282                 }
1283                 set_irq_state(adapter, byte);
1284
1285                 while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1286                                 == 0xFF)
1287                         cpu_relax();
1288                 adapter->mbox->m_in.numstatus = 0xFF;
1289
1290                 status = adapter->mbox->m_in.status;
1291
1292                 /*
1293                  * decrement the pending queue counter
1294                  */
1295                 atomic_sub(nstatus, &adapter->pend_cmds);
1296
1297                 memcpy(completed, (void *)adapter->mbox->m_in.completed,
1298                                 nstatus);
1299
1300                 /* Acknowledge interrupt */
1301                 irq_ack(adapter);
1302
1303                 mega_cmd_done(adapter, completed, nstatus, status);
1304
1305                 mega_rundoneq(adapter);
1306
1307                 handled = 1;
1308
1309                 /* Loop through any pending requests */
1310                 if(atomic_read(&adapter->quiescent) == 0) {
1311                         mega_runpendq(adapter);
1312                 }
1313
1314         } while(1);
1315
1316  out_unlock:
1317
1318         spin_unlock_irqrestore(&adapter->lock, flags);
1319
1320         return IRQ_RETVAL(handled);
1321 }
1322
1323
1324 /**
1325  * megaraid_isr_memmapped()
1326  * @irq - irq
1327  * @devp - pointer to our soft state
1328  *
1329  * Interrupt service routine for memory-mapped controllers.
1330  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1331  * and service the completed commands.
1332  */
1333 static irqreturn_t
1334 megaraid_isr_memmapped(int irq, void *devp)
1335 {
1336         adapter_t       *adapter = devp;
1337         unsigned long   flags;
1338         u8      status;
1339         u32     dword = 0;
1340         u8      nstatus;
1341         u8      completed[MAX_FIRMWARE_STATUS];
1342         int     handled = 0;
1343
1344
1345         /*
1346          * loop till F/W has more commands for us to complete.
1347          */
1348         spin_lock_irqsave(&adapter->lock, flags);
1349
1350         do {
1351                 /* Check if a valid interrupt is pending */
1352                 dword = RDOUTDOOR(adapter);
1353                 if(dword != 0x10001234) {
1354                         /*
1355                          * No more pending commands
1356                          */
1357                         goto out_unlock;
1358                 }
1359                 WROUTDOOR(adapter, 0x10001234);
1360
1361                 while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1362                                 == 0xFF) {
1363                         cpu_relax();
1364                 }
1365                 adapter->mbox->m_in.numstatus = 0xFF;
1366
1367                 status = adapter->mbox->m_in.status;
1368
1369                 /*
1370                  * decrement the pending queue counter
1371                  */
1372                 atomic_sub(nstatus, &adapter->pend_cmds);
1373
1374                 memcpy(completed, (void *)adapter->mbox->m_in.completed,
1375                                 nstatus);
1376
1377                 /* Acknowledge interrupt */
1378                 WRINDOOR(adapter, 0x2);
1379
1380                 handled = 1;
1381
1382                 while( RDINDOOR(adapter) & 0x02 )
1383                         cpu_relax();
1384
1385                 mega_cmd_done(adapter, completed, nstatus, status);
1386
1387                 mega_rundoneq(adapter);
1388
1389                 /* Loop through any pending requests */
1390                 if(atomic_read(&adapter->quiescent) == 0) {
1391                         mega_runpendq(adapter);
1392                 }
1393
1394         } while(1);
1395
1396  out_unlock:
1397
1398         spin_unlock_irqrestore(&adapter->lock, flags);
1399
1400         return IRQ_RETVAL(handled);
1401 }
1402 /**
1403  * mega_cmd_done()
1404  * @adapter - pointer to our soft state
1405  * @completed - array of ids of completed commands
1406  * @nstatus - number of completed commands
1407  * @status - status of the last command completed
1408  *
1409  * Complete the commands and call the scsi mid-layer callback hooks.
1410  */
1411 static void
1412 mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status)
1413 {
1414         mega_ext_passthru       *epthru = NULL;
1415         struct scatterlist      *sgl;
1416         struct scsi_cmnd        *cmd = NULL;
1417         mega_passthru   *pthru = NULL;
1418         mbox_t  *mbox = NULL;
1419         u8      c;
1420         scb_t   *scb;
1421         int     islogical;
1422         int     cmdid;
1423         int     i;
1424
1425         /*
1426          * for all the commands completed, call the mid-layer callback routine
1427          * and free the scb.
1428          */
1429         for( i = 0; i < nstatus; i++ ) {
1430
1431                 cmdid = completed[i];
1432
1433                 /*
1434                  * Only free SCBs for the commands coming down from the
1435                  * mid-layer, not for which were issued internally
1436                  *
1437                  * For internal command, restore the status returned by the
1438                  * firmware so that user can interpret it.
1439                  */
1440                 if (cmdid == CMDID_INT_CMDS) {
1441                         scb = &adapter->int_scb;
1442
1443                         list_del_init(&scb->list);
1444                         scb->state = SCB_FREE;
1445
1446                         adapter->int_status = status;
1447                         complete(&adapter->int_waitq);
1448                 } else {
1449                         scb = &adapter->scb_list[cmdid];
1450
1451                         /*
1452                          * Make sure f/w has completed a valid command
1453                          */
1454                         if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
1455                                 dev_crit(&adapter->dev->dev, "invalid command "
1456                                         "Id %d, scb->state:%x, scsi cmd:%p\n",
1457                                         cmdid, scb->state, scb->cmd);
1458
1459                                 continue;
1460                         }
1461
1462                         /*
1463                          * Was a abort issued for this command
1464                          */
1465                         if( scb->state & SCB_ABORT ) {
1466
1467                                 dev_warn(&adapter->dev->dev,
1468                                         "aborted cmd [%x] complete\n",
1469                                         scb->idx);
1470
1471                                 scb->cmd->result = (DID_ABORT << 16);
1472
1473                                 list_add_tail(SCSI_LIST(scb->cmd),
1474                                                 &adapter->completed_list);
1475
1476                                 mega_free_scb(adapter, scb);
1477
1478                                 continue;
1479                         }
1480
1481                         /*
1482                          * Was a reset issued for this command
1483                          */
1484                         if( scb->state & SCB_RESET ) {
1485
1486                                 dev_warn(&adapter->dev->dev,
1487                                         "reset cmd [%x] complete\n",
1488                                         scb->idx);
1489
1490                                 scb->cmd->result = (DID_RESET << 16);
1491
1492                                 list_add_tail(SCSI_LIST(scb->cmd),
1493                                                 &adapter->completed_list);
1494
1495                                 mega_free_scb (adapter, scb);
1496
1497                                 continue;
1498                         }
1499
1500                         cmd = scb->cmd;
1501                         pthru = scb->pthru;
1502                         epthru = scb->epthru;
1503                         mbox = (mbox_t *)scb->raw_mbox;
1504
1505 #if MEGA_HAVE_STATS
1506                         {
1507
1508                         int     logdrv = mbox->m_out.logdrv;
1509
1510                         islogical = adapter->logdrv_chan[cmd->channel];
1511                         /*
1512                          * Maintain an error counter for the logical drive.
1513                          * Some application like SNMP agent need such
1514                          * statistics
1515                          */
1516                         if( status && islogical && (cmd->cmnd[0] == READ_6 ||
1517                                                 cmd->cmnd[0] == READ_10 ||
1518                                                 cmd->cmnd[0] == READ_12)) {
1519                                 /*
1520                                  * Logical drive number increases by 0x80 when
1521                                  * a logical drive is deleted
1522                                  */
1523                                 adapter->rd_errors[logdrv%0x80]++;
1524                         }
1525
1526                         if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
1527                                                 cmd->cmnd[0] == WRITE_10 ||
1528                                                 cmd->cmnd[0] == WRITE_12)) {
1529                                 /*
1530                                  * Logical drive number increases by 0x80 when
1531                                  * a logical drive is deleted
1532                                  */
1533                                 adapter->wr_errors[logdrv%0x80]++;
1534                         }
1535
1536                         }
1537 #endif
1538                 }
1539
1540                 /*
1541                  * Do not return the presence of hard disk on the channel so,
1542                  * inquiry sent, and returned data==hard disk or removable
1543                  * hard disk and not logical, request should return failure! -
1544                  * PJ
1545                  */
1546                 islogical = adapter->logdrv_chan[cmd->device->channel];
1547                 if( cmd->cmnd[0] == INQUIRY && !islogical ) {
1548
1549                         sgl = scsi_sglist(cmd);
1550                         if( sg_page(sgl) ) {
1551                                 c = *(unsigned char *) sg_virt(&sgl[0]);
1552                         } else {
1553                                 dev_warn(&adapter->dev->dev, "invalid sg\n");
1554                                 c = 0;
1555                         }
1556
1557                         if(IS_RAID_CH(adapter, cmd->device->channel) &&
1558                                         ((c & 0x1F ) == TYPE_DISK)) {
1559                                 status = 0xF0;
1560                         }
1561                 }
1562
1563                 /* clear result; otherwise, success returns corrupt value */
1564                 cmd->result = 0;
1565
1566                 /* Convert MegaRAID status to Linux error code */
1567                 switch (status) {
1568                 case 0x00:      /* SUCCESS , i.e. SCSI_STATUS_GOOD */
1569                         cmd->result |= (DID_OK << 16);
1570                         break;
1571
1572                 case 0x02:      /* ERROR_ABORTED, i.e.
1573                                    SCSI_STATUS_CHECK_CONDITION */
1574
1575                         /* set sense_buffer and result fields */
1576                         if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
1577                                 mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
1578
1579                                 memcpy(cmd->sense_buffer, pthru->reqsensearea,
1580                                                 14);
1581
1582                                 cmd->result = (DRIVER_SENSE << 24) |
1583                                         (DID_OK << 16) |
1584                                         (CHECK_CONDITION << 1);
1585                         }
1586                         else {
1587                                 if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
1588
1589                                         memcpy(cmd->sense_buffer,
1590                                                 epthru->reqsensearea, 14);
1591
1592                                         cmd->result = (DRIVER_SENSE << 24) |
1593                                                 (DID_OK << 16) |
1594                                                 (CHECK_CONDITION << 1);
1595                                 } else {
1596                                         cmd->sense_buffer[0] = 0x70;
1597                                         cmd->sense_buffer[2] = ABORTED_COMMAND;
1598                                         cmd->result |= (CHECK_CONDITION << 1);
1599                                 }
1600                         }
1601                         break;
1602
1603                 case 0x08:      /* ERR_DEST_DRIVE_FAILED, i.e.
1604                                    SCSI_STATUS_BUSY */
1605                         cmd->result |= (DID_BUS_BUSY << 16) | status;
1606                         break;
1607
1608                 default:
1609 #if MEGA_HAVE_CLUSTERING
1610                         /*
1611                          * If TEST_UNIT_READY fails, we know
1612                          * MEGA_RESERVATION_STATUS failed
1613                          */
1614                         if( cmd->cmnd[0] == TEST_UNIT_READY ) {
1615                                 cmd->result |= (DID_ERROR << 16) |
1616                                         (RESERVATION_CONFLICT << 1);
1617                         }
1618                         else
1619                         /*
1620                          * Error code returned is 1 if Reserve or Release
1621                          * failed or the input parameter is invalid
1622                          */
1623                         if( status == 1 &&
1624                                 (cmd->cmnd[0] == RESERVE ||
1625                                          cmd->cmnd[0] == RELEASE) ) {
1626
1627                                 cmd->result |= (DID_ERROR << 16) |
1628                                         (RESERVATION_CONFLICT << 1);
1629                         }
1630                         else
1631 #endif
1632                                 cmd->result |= (DID_BAD_TARGET << 16)|status;
1633                 }
1634
1635                 mega_free_scb(adapter, scb);
1636
1637                 /* Add Scsi_Command to end of completed queue */
1638                 list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
1639         }
1640 }
1641
1642
1643 /*
1644  * mega_runpendq()
1645  *
1646  * Run through the list of completed requests and finish it
1647  */
1648 static void
1649 mega_rundoneq (adapter_t *adapter)
1650 {
1651         struct scsi_cmnd *cmd;
1652         struct list_head *pos;
1653
1654         list_for_each(pos, &adapter->completed_list) {
1655
1656                 struct scsi_pointer* spos = (struct scsi_pointer *)pos;
1657
1658                 cmd = list_entry(spos, struct scsi_cmnd, SCp);
1659                 cmd->scsi_done(cmd);
1660         }
1661
1662         INIT_LIST_HEAD(&adapter->completed_list);
1663 }
1664
1665
1666 /*
1667  * Free a SCB structure
1668  * Note: We assume the scsi commands associated with this scb is not free yet.
1669  */
1670 static void
1671 mega_free_scb(adapter_t *adapter, scb_t *scb)
1672 {
1673         switch( scb->dma_type ) {
1674
1675         case MEGA_DMA_TYPE_NONE:
1676                 break;
1677
1678         case MEGA_SGLIST:
1679                 scsi_dma_unmap(scb->cmd);
1680                 break;
1681         default:
1682                 break;
1683         }
1684
1685         /*
1686          * Remove from the pending list
1687          */
1688         list_del_init(&scb->list);
1689
1690         /* Link the scb back into free list */
1691         scb->state = SCB_FREE;
1692         scb->cmd = NULL;
1693
1694         list_add(&scb->list, &adapter->free_list);
1695 }
1696
1697
1698 static int
1699 __mega_busywait_mbox (adapter_t *adapter)
1700 {
1701         volatile mbox_t *mbox = adapter->mbox;
1702         long counter;
1703
1704         for (counter = 0; counter < 10000; counter++) {
1705                 if (!mbox->m_in.busy)
1706                         return 0;
1707                 udelay(100);
1708                 cond_resched();
1709         }
1710         return -1;              /* give up after 1 second */
1711 }
1712
1713 /*
1714  * Copies data to SGLIST
1715  * Note: For 64 bit cards, we need a minimum of one SG element for read/write
1716  */
1717 static int
1718 mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
1719 {
1720         struct scatterlist *sg;
1721         struct scsi_cmnd        *cmd;
1722         int     sgcnt;
1723         int     idx;
1724
1725         cmd = scb->cmd;
1726
1727         /*
1728          * Copy Scatter-Gather list info into controller structure.
1729          *
1730          * The number of sg elements returned must not exceed our limit
1731          */
1732         sgcnt = scsi_dma_map(cmd);
1733
1734         scb->dma_type = MEGA_SGLIST;
1735
1736         BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);
1737
1738         *len = 0;
1739
1740         if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
1741                 sg = scsi_sglist(cmd);
1742                 scb->dma_h_bulkdata = sg_dma_address(sg);
1743                 *buf = (u32)scb->dma_h_bulkdata;
1744                 *len = sg_dma_len(sg);
1745                 return 0;
1746         }
1747
1748         scsi_for_each_sg(cmd, sg, sgcnt, idx) {
1749                 if (adapter->has_64bit_addr) {
1750                         scb->sgl64[idx].address = sg_dma_address(sg);
1751                         *len += scb->sgl64[idx].length = sg_dma_len(sg);
1752                 } else {
1753                         scb->sgl[idx].address = sg_dma_address(sg);
1754                         *len += scb->sgl[idx].length = sg_dma_len(sg);
1755                 }
1756         }
1757
1758         /* Reset pointer and length fields */
1759         *buf = scb->sgl_dma_addr;
1760
1761         /* Return count of SG requests */
1762         return sgcnt;
1763 }
1764
1765
1766 /*
1767  * mega_8_to_40ld()
1768  *
1769  * takes all info in AdapterInquiry structure and puts it into ProductInfo and
1770  * Enquiry3 structures for later use
1771  */
1772 static void
1773 mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
1774                 mega_product_info *product_info)
1775 {
1776         int i;
1777
1778         product_info->max_commands = inquiry->adapter_info.max_commands;
1779         enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
1780         product_info->nchannels = inquiry->adapter_info.nchannels;
1781
1782         for (i = 0; i < 4; i++) {
1783                 product_info->fw_version[i] =
1784                         inquiry->adapter_info.fw_version[i];
1785
1786                 product_info->bios_version[i] =
1787                         inquiry->adapter_info.bios_version[i];
1788         }
1789         enquiry3->cache_flush_interval =
1790                 inquiry->adapter_info.cache_flush_interval;
1791
1792         product_info->dram_size = inquiry->adapter_info.dram_size;
1793
1794         enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
1795
1796         for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
1797                 enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
1798                 enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
1799                 enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
1800         }
1801
1802         for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
1803                 enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
1804 }
1805
1806 static inline void
1807 mega_free_sgl(adapter_t *adapter)
1808 {
1809         scb_t   *scb;
1810         int     i;
1811
1812         for(i = 0; i < adapter->max_cmds; i++) {
1813
1814                 scb = &adapter->scb_list[i];
1815
1816                 if( scb->sgl64 ) {
1817                         pci_free_consistent(adapter->dev,
1818                                 sizeof(mega_sgl64) * adapter->sglen,
1819                                 scb->sgl64,
1820                                 scb->sgl_dma_addr);
1821
1822                         scb->sgl64 = NULL;
1823                 }
1824
1825                 if( scb->pthru ) {
1826                         pci_free_consistent(adapter->dev, sizeof(mega_passthru),
1827                                 scb->pthru, scb->pthru_dma_addr);
1828
1829                         scb->pthru = NULL;
1830                 }
1831
1832                 if( scb->epthru ) {
1833                         pci_free_consistent(adapter->dev,
1834                                 sizeof(mega_ext_passthru),
1835                                 scb->epthru, scb->epthru_dma_addr);
1836
1837                         scb->epthru = NULL;
1838                 }
1839
1840         }
1841 }
1842
1843
1844 /*
1845  * Get information about the card/driver
1846  */
1847 const char *
1848 megaraid_info(struct Scsi_Host *host)
1849 {
1850         static char buffer[512];
1851         adapter_t *adapter;
1852
1853         adapter = (adapter_t *)host->hostdata;
1854
1855         sprintf (buffer,
1856                  "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
1857                  adapter->fw_version, adapter->product_info.max_commands,
1858                  adapter->host->max_id, adapter->host->max_channel,
1859                  (u32)adapter->host->max_lun);
1860         return buffer;
1861 }
1862
1863 /*
1864  * Abort a previous SCSI request. Only commands on the pending list can be
1865  * aborted. All the commands issued to the F/W must complete.
1866  */
1867 static int
1868 megaraid_abort(struct scsi_cmnd *cmd)
1869 {
1870         adapter_t       *adapter;
1871         int             rval;
1872
1873         adapter = (adapter_t *)cmd->device->host->hostdata;
1874
1875         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
1876
1877         /*
1878          * This is required here to complete any completed requests
1879          * to be communicated over to the mid layer.
1880          */
1881         mega_rundoneq(adapter);
1882
1883         return rval;
1884 }
1885
1886
1887 static int
1888 megaraid_reset(struct scsi_cmnd *cmd)
1889 {
1890         adapter_t       *adapter;
1891         megacmd_t       mc;
1892         int             rval;
1893
1894         adapter = (adapter_t *)cmd->device->host->hostdata;
1895
1896 #if MEGA_HAVE_CLUSTERING
1897         mc.cmd = MEGA_CLUSTER_CMD;
1898         mc.opcode = MEGA_RESET_RESERVATIONS;
1899
1900         if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
1901                 dev_warn(&adapter->dev->dev, "reservation reset failed\n");
1902         }
1903         else {
1904                 dev_info(&adapter->dev->dev, "reservation reset\n");
1905         }
1906 #endif
1907
1908         spin_lock_irq(&adapter->lock);
1909
1910         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
1911
1912         /*
1913          * This is required here to complete any completed requests
1914          * to be communicated over to the mid layer.
1915          */
1916         mega_rundoneq(adapter);
1917         spin_unlock_irq(&adapter->lock);
1918
1919         return rval;
1920 }
1921
1922 /**
1923  * megaraid_abort_and_reset()
1924  * @adapter - megaraid soft state
1925  * @cmd - scsi command to be aborted or reset
1926  * @aor - abort or reset flag
1927  *
1928  * Try to locate the scsi command in the pending queue. If found and is not
1929  * issued to the controller, abort/reset it. Otherwise return failure
1930  */
1931 static int
1932 megaraid_abort_and_reset(adapter_t *adapter, struct scsi_cmnd *cmd, int aor)
1933 {
1934         struct list_head        *pos, *next;
1935         scb_t                   *scb;
1936
1937         dev_warn(&adapter->dev->dev, "%s cmd=%x <c=%d t=%d l=%d>\n",
1938              (aor == SCB_ABORT)? "ABORTING":"RESET",
1939              cmd->cmnd[0], cmd->device->channel,
1940              cmd->device->id, (u32)cmd->device->lun);
1941
1942         if(list_empty(&adapter->pending_list))
1943                 return FAILED;
1944
1945         list_for_each_safe(pos, next, &adapter->pending_list) {
1946
1947                 scb = list_entry(pos, scb_t, list);
1948
1949                 if (scb->cmd == cmd) { /* Found command */
1950
1951                         scb->state |= aor;
1952
1953                         /*
1954                          * Check if this command has firmware ownership. If
1955                          * yes, we cannot reset this command. Whenever f/w
1956                          * completes this command, we will return appropriate
1957                          * status from ISR.
1958                          */
1959                         if( scb->state & SCB_ISSUED ) {
1960
1961                                 dev_warn(&adapter->dev->dev,
1962                                         "%s[%x], fw owner\n",
1963                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1964                                         scb->idx);
1965
1966                                 return FAILED;
1967                         }
1968                         else {
1969
1970                                 /*
1971                                  * Not yet issued! Remove from the pending
1972                                  * list
1973                                  */
1974                                 dev_warn(&adapter->dev->dev,
1975                                         "%s-[%x], driver owner\n",
1976                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1977                                         scb->idx);
1978
1979                                 mega_free_scb(adapter, scb);
1980
1981                                 if( aor == SCB_ABORT ) {
1982                                         cmd->result = (DID_ABORT << 16);
1983                                 }
1984                                 else {
1985                                         cmd->result = (DID_RESET << 16);
1986                                 }
1987
1988                                 list_add_tail(SCSI_LIST(cmd),
1989                                                 &adapter->completed_list);
1990
1991                                 return SUCCESS;
1992                         }
1993                 }
1994         }
1995
1996         return FAILED;
1997 }
1998
1999 static inline int
2000 make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
2001 {
2002         *pdev = pci_alloc_dev(NULL);
2003
2004         if( *pdev == NULL ) return -1;
2005
2006         memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
2007
2008         if( pci_set_dma_mask(*pdev, DMA_BIT_MASK(32)) != 0 ) {
2009                 kfree(*pdev);
2010                 return -1;
2011         }
2012
2013         return 0;
2014 }
2015
2016 static inline void
2017 free_local_pdev(struct pci_dev *pdev)
2018 {
2019         kfree(pdev);
2020 }
2021
2022 /**
2023  * mega_allocate_inquiry()
2024  * @dma_handle - handle returned for dma address
2025  * @pdev - handle to pci device
2026  *
2027  * allocates memory for inquiry structure
2028  */
2029 static inline void *
2030 mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
2031 {
2032         return pci_alloc_consistent(pdev, sizeof(mega_inquiry3), dma_handle);
2033 }
2034
2035
2036 static inline void
2037 mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
2038 {
2039         pci_free_consistent(pdev, sizeof(mega_inquiry3), inquiry, dma_handle);
2040 }
2041
2042
2043 #ifdef CONFIG_PROC_FS
2044 /* Following code handles /proc fs  */
2045
2046 /**
2047  * proc_show_config()
2048  * @m - Synthetic file construction data
2049  * @v - File iterator
2050  *
2051  * Display configuration information about the controller.
2052  */
2053 static int
2054 proc_show_config(struct seq_file *m, void *v)
2055 {
2056
2057         adapter_t *adapter = m->private;
2058
2059         seq_puts(m, MEGARAID_VERSION);
2060         if(adapter->product_info.product_name[0])
2061                 seq_printf(m, "%s\n", adapter->product_info.product_name);
2062
2063         seq_puts(m, "Controller Type: ");
2064
2065         if( adapter->flag & BOARD_MEMMAP )
2066                 seq_puts(m, "438/466/467/471/493/518/520/531/532\n");
2067         else
2068                 seq_puts(m, "418/428/434\n");
2069
2070         if(adapter->flag & BOARD_40LD)
2071                 seq_puts(m, "Controller Supports 40 Logical Drives\n");
2072
2073         if(adapter->flag & BOARD_64BIT)
2074                 seq_puts(m, "Controller capable of 64-bit memory addressing\n");
2075         if( adapter->has_64bit_addr )
2076                 seq_puts(m, "Controller using 64-bit memory addressing\n");
2077         else
2078                 seq_puts(m, "Controller is not using 64-bit memory addressing\n");
2079
2080         seq_printf(m, "Base = %08lx, Irq = %d, ",
2081                    adapter->base, adapter->host->irq);
2082
2083         seq_printf(m, "Logical Drives = %d, Channels = %d\n",
2084                    adapter->numldrv, adapter->product_info.nchannels);
2085
2086         seq_printf(m, "Version =%s:%s, DRAM = %dMb\n",
2087                    adapter->fw_version, adapter->bios_version,
2088                    adapter->product_info.dram_size);
2089
2090         seq_printf(m, "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
2091                    adapter->product_info.max_commands, adapter->max_cmds);
2092
2093         seq_printf(m, "support_ext_cdb    = %d\n", adapter->support_ext_cdb);
2094         seq_printf(m, "support_random_del = %d\n", adapter->support_random_del);
2095         seq_printf(m, "boot_ldrv_enabled  = %d\n", adapter->boot_ldrv_enabled);
2096         seq_printf(m, "boot_ldrv          = %d\n", adapter->boot_ldrv);
2097         seq_printf(m, "boot_pdrv_enabled  = %d\n", adapter->boot_pdrv_enabled);
2098         seq_printf(m, "boot_pdrv_ch       = %d\n", adapter->boot_pdrv_ch);
2099         seq_printf(m, "boot_pdrv_tgt      = %d\n", adapter->boot_pdrv_tgt);
2100         seq_printf(m, "quiescent          = %d\n",
2101                    atomic_read(&adapter->quiescent));
2102         seq_printf(m, "has_cluster        = %d\n", adapter->has_cluster);
2103
2104         seq_puts(m, "\nModule Parameters:\n");
2105         seq_printf(m, "max_cmd_per_lun    = %d\n", max_cmd_per_lun);
2106         seq_printf(m, "max_sectors_per_io = %d\n", max_sectors_per_io);
2107         return 0;
2108 }
2109
2110 /**
2111  * proc_show_stat()
2112  * @m - Synthetic file construction data
2113  * @v - File iterator
2114  *
2115  * Display statistical information about the I/O activity.
2116  */
2117 static int
2118 proc_show_stat(struct seq_file *m, void *v)
2119 {
2120         adapter_t *adapter = m->private;
2121 #if MEGA_HAVE_STATS
2122         int     i;
2123 #endif
2124
2125         seq_puts(m, "Statistical Information for this controller\n");
2126         seq_printf(m, "pend_cmds = %d\n", atomic_read(&adapter->pend_cmds));
2127 #if MEGA_HAVE_STATS
2128         for(i = 0; i < adapter->numldrv; i++) {
2129                 seq_printf(m, "Logical Drive %d:\n", i);
2130                 seq_printf(m, "\tReads Issued = %lu, Writes Issued = %lu\n",
2131                            adapter->nreads[i], adapter->nwrites[i]);
2132                 seq_printf(m, "\tSectors Read = %lu, Sectors Written = %lu\n",
2133                            adapter->nreadblocks[i], adapter->nwriteblocks[i]);
2134                 seq_printf(m, "\tRead errors = %lu, Write errors = %lu\n\n",
2135                            adapter->rd_errors[i], adapter->wr_errors[i]);
2136         }
2137 #else
2138         seq_puts(m, "IO and error counters not compiled in driver.\n");
2139 #endif
2140         return 0;
2141 }
2142
2143
2144 /**
2145  * proc_show_mbox()
2146  * @m - Synthetic file construction data
2147  * @v - File iterator
2148  *
2149  * Display mailbox information for the last command issued. This information
2150  * is good for debugging.
2151  */
2152 static int
2153 proc_show_mbox(struct seq_file *m, void *v)
2154 {
2155         adapter_t       *adapter = m->private;
2156         volatile mbox_t *mbox = adapter->mbox;
2157
2158         seq_puts(m, "Contents of Mail Box Structure\n");
2159         seq_printf(m, "  Fw Command   = 0x%02x\n", mbox->m_out.cmd);
2160         seq_printf(m, "  Cmd Sequence = 0x%02x\n", mbox->m_out.cmdid);
2161         seq_printf(m, "  No of Sectors= %04d\n", mbox->m_out.numsectors);
2162         seq_printf(m, "  LBA          = 0x%02x\n", mbox->m_out.lba);
2163         seq_printf(m, "  DTA          = 0x%08x\n", mbox->m_out.xferaddr);
2164         seq_printf(m, "  Logical Drive= 0x%02x\n", mbox->m_out.logdrv);
2165         seq_printf(m, "  No of SG Elmt= 0x%02x\n", mbox->m_out.numsgelements);
2166         seq_printf(m, "  Busy         = %01x\n", mbox->m_in.busy);
2167         seq_printf(m, "  Status       = 0x%02x\n", mbox->m_in.status);
2168         return 0;
2169 }
2170
2171
2172 /**
2173  * proc_show_rebuild_rate()
2174  * @m - Synthetic file construction data
2175  * @v - File iterator
2176  *
2177  * Display current rebuild rate
2178  */
2179 static int
2180 proc_show_rebuild_rate(struct seq_file *m, void *v)
2181 {
2182         adapter_t       *adapter = m->private;
2183         dma_addr_t      dma_handle;
2184         caddr_t         inquiry;
2185         struct pci_dev  *pdev;
2186
2187         if( make_local_pdev(adapter, &pdev) != 0 )
2188                 return 0;
2189
2190         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2191                 goto free_pdev;
2192
2193         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2194                 seq_puts(m, "Adapter inquiry failed.\n");
2195                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2196                 goto free_inquiry;
2197         }
2198
2199         if( adapter->flag & BOARD_40LD )
2200                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2201                            ((mega_inquiry3 *)inquiry)->rebuild_rate);
2202         else
2203                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2204                         ((mraid_ext_inquiry *)
2205                          inquiry)->raid_inq.adapter_info.rebuild_rate);
2206
2207 free_inquiry:
2208         mega_free_inquiry(inquiry, dma_handle, pdev);
2209 free_pdev:
2210         free_local_pdev(pdev);
2211         return 0;
2212 }
2213
2214
2215 /**
2216  * proc_show_battery()
2217  * @m - Synthetic file construction data
2218  * @v - File iterator
2219  *
2220  * Display information about the battery module on the controller.
2221  */
2222 static int
2223 proc_show_battery(struct seq_file *m, void *v)
2224 {
2225         adapter_t       *adapter = m->private;
2226         dma_addr_t      dma_handle;
2227         caddr_t         inquiry;
2228         struct pci_dev  *pdev;
2229         u8      battery_status;
2230
2231         if( make_local_pdev(adapter, &pdev) != 0 )
2232                 return 0;
2233
2234         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2235                 goto free_pdev;
2236
2237         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2238                 seq_puts(m, "Adapter inquiry failed.\n");
2239                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2240                 goto free_inquiry;
2241         }
2242
2243         if( adapter->flag & BOARD_40LD ) {
2244                 battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
2245         }
2246         else {
2247                 battery_status = ((mraid_ext_inquiry *)inquiry)->
2248                         raid_inq.adapter_info.battery_status;
2249         }
2250
2251         /*
2252          * Decode the battery status
2253          */
2254         seq_printf(m, "Battery Status:[%d]", battery_status);
2255
2256         if(battery_status == MEGA_BATT_CHARGE_DONE)
2257                 seq_puts(m, " Charge Done");
2258
2259         if(battery_status & MEGA_BATT_MODULE_MISSING)
2260                 seq_puts(m, " Module Missing");
2261
2262         if(battery_status & MEGA_BATT_LOW_VOLTAGE)
2263                 seq_puts(m, " Low Voltage");
2264
2265         if(battery_status & MEGA_BATT_TEMP_HIGH)
2266                 seq_puts(m, " Temperature High");
2267
2268         if(battery_status & MEGA_BATT_PACK_MISSING)
2269                 seq_puts(m, " Pack Missing");
2270
2271         if(battery_status & MEGA_BATT_CHARGE_INPROG)
2272                 seq_puts(m, " Charge In-progress");
2273
2274         if(battery_status & MEGA_BATT_CHARGE_FAIL)
2275                 seq_puts(m, " Charge Fail");
2276
2277         if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
2278                 seq_puts(m, " Cycles Exceeded");
2279
2280         seq_putc(m, '\n');
2281
2282 free_inquiry:
2283         mega_free_inquiry(inquiry, dma_handle, pdev);
2284 free_pdev:
2285         free_local_pdev(pdev);
2286         return 0;
2287 }
2288
2289
2290 /*
2291  * Display scsi inquiry
2292  */
2293 static void
2294 mega_print_inquiry(struct seq_file *m, char *scsi_inq)
2295 {
2296         int     i;
2297
2298         seq_puts(m, "  Vendor: ");
2299         seq_write(m, scsi_inq + 8, 8);
2300         seq_puts(m, "  Model: ");
2301         seq_write(m, scsi_inq + 16, 16);
2302         seq_puts(m, "  Rev: ");
2303         seq_write(m, scsi_inq + 32, 4);
2304         seq_putc(m, '\n');
2305
2306         i = scsi_inq[0] & 0x1f;
2307         seq_printf(m, "  Type:   %s ", scsi_device_type(i));
2308
2309         seq_printf(m, "                 ANSI SCSI revision: %02x",
2310                    scsi_inq[2] & 0x07);
2311
2312         if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
2313                 seq_puts(m, " CCS\n");
2314         else
2315                 seq_putc(m, '\n');
2316 }
2317
2318 /**
2319  * proc_show_pdrv()
2320  * @m - Synthetic file construction data
2321  * @page - buffer to write the data in
2322  * @adapter - pointer to our soft state
2323  *
2324  * Display information about the physical drives.
2325  */
2326 static int
2327 proc_show_pdrv(struct seq_file *m, adapter_t *adapter, int channel)
2328 {
2329         dma_addr_t      dma_handle;
2330         char            *scsi_inq;
2331         dma_addr_t      scsi_inq_dma_handle;
2332         caddr_t         inquiry;
2333         struct pci_dev  *pdev;
2334         u8      *pdrv_state;
2335         u8      state;
2336         int     tgt;
2337         int     max_channels;
2338         int     i;
2339
2340         if( make_local_pdev(adapter, &pdev) != 0 )
2341                 return 0;
2342
2343         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2344                 goto free_pdev;
2345
2346         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2347                 seq_puts(m, "Adapter inquiry failed.\n");
2348                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2349                 goto free_inquiry;
2350         }
2351
2352
2353         scsi_inq = pci_alloc_consistent(pdev, 256, &scsi_inq_dma_handle);
2354         if( scsi_inq == NULL ) {
2355                 seq_puts(m, "memory not available for scsi inq.\n");
2356                 goto free_inquiry;
2357         }
2358
2359         if( adapter->flag & BOARD_40LD ) {
2360                 pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
2361         }
2362         else {
2363                 pdrv_state = ((mraid_ext_inquiry *)inquiry)->
2364                         raid_inq.pdrv_info.pdrv_state;
2365         }
2366
2367         max_channels = adapter->product_info.nchannels;
2368
2369         if( channel >= max_channels ) {
2370                 goto free_pci;
2371         }
2372
2373         for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
2374
2375                 i = channel*16 + tgt;
2376
2377                 state = *(pdrv_state + i);
2378                 switch( state & 0x0F ) {
2379                 case PDRV_ONLINE:
2380                         seq_printf(m, "Channel:%2d Id:%2d State: Online",
2381                                    channel, tgt);
2382                         break;
2383
2384                 case PDRV_FAILED:
2385                         seq_printf(m, "Channel:%2d Id:%2d State: Failed",
2386                                    channel, tgt);
2387                         break;
2388
2389                 case PDRV_RBLD:
2390                         seq_printf(m, "Channel:%2d Id:%2d State: Rebuild",
2391                                    channel, tgt);
2392                         break;
2393
2394                 case PDRV_HOTSPARE:
2395                         seq_printf(m, "Channel:%2d Id:%2d State: Hot spare",
2396                                    channel, tgt);
2397                         break;
2398
2399                 default:
2400                         seq_printf(m, "Channel:%2d Id:%2d State: Un-configured",
2401                                    channel, tgt);
2402                         break;
2403                 }
2404
2405                 /*
2406                  * This interface displays inquiries for disk drives
2407                  * only. Inquries for logical drives and non-disk
2408                  * devices are available through /proc/scsi/scsi
2409                  */
2410                 memset(scsi_inq, 0, 256);
2411                 if( mega_internal_dev_inquiry(adapter, channel, tgt,
2412                                 scsi_inq_dma_handle) ||
2413                                 (scsi_inq[0] & 0x1F) != TYPE_DISK ) {
2414                         continue;
2415                 }
2416
2417                 /*
2418                  * Check for overflow. We print less than 240
2419                  * characters for inquiry
2420                  */
2421                 seq_puts(m, ".\n");
2422                 mega_print_inquiry(m, scsi_inq);
2423         }
2424
2425 free_pci:
2426         pci_free_consistent(pdev, 256, scsi_inq, scsi_inq_dma_handle);
2427 free_inquiry:
2428         mega_free_inquiry(inquiry, dma_handle, pdev);
2429 free_pdev:
2430         free_local_pdev(pdev);
2431         return 0;
2432 }
2433
2434 /**
2435  * proc_show_pdrv_ch0()
2436  * @m - Synthetic file construction data
2437  * @v - File iterator
2438  *
2439  * Display information about the physical drives on physical channel 0.
2440  */
2441 static int
2442 proc_show_pdrv_ch0(struct seq_file *m, void *v)
2443 {
2444         return proc_show_pdrv(m, m->private, 0);
2445 }
2446
2447
2448 /**
2449  * proc_show_pdrv_ch1()
2450  * @m - Synthetic file construction data
2451  * @v - File iterator
2452  *
2453  * Display information about the physical drives on physical channel 1.
2454  */
2455 static int
2456 proc_show_pdrv_ch1(struct seq_file *m, void *v)
2457 {
2458         return proc_show_pdrv(m, m->private, 1);
2459 }
2460
2461
2462 /**
2463  * proc_show_pdrv_ch2()
2464  * @m - Synthetic file construction data
2465  * @v - File iterator
2466  *
2467  * Display information about the physical drives on physical channel 2.
2468  */
2469 static int
2470 proc_show_pdrv_ch2(struct seq_file *m, void *v)
2471 {
2472         return proc_show_pdrv(m, m->private, 2);
2473 }
2474
2475
2476 /**
2477  * proc_show_pdrv_ch3()
2478  * @m - Synthetic file construction data
2479  * @v - File iterator
2480  *
2481  * Display information about the physical drives on physical channel 3.
2482  */
2483 static int
2484 proc_show_pdrv_ch3(struct seq_file *m, void *v)
2485 {
2486         return proc_show_pdrv(m, m->private, 3);
2487 }
2488
2489
2490 /**
2491  * proc_show_rdrv()
2492  * @m - Synthetic file construction data
2493  * @adapter - pointer to our soft state
2494  * @start - starting logical drive to display
2495  * @end - ending logical drive to display
2496  *
2497  * We do not print the inquiry information since its already available through
2498  * /proc/scsi/scsi interface
2499  */
2500 static int
2501 proc_show_rdrv(struct seq_file *m, adapter_t *adapter, int start, int end )
2502 {
2503         dma_addr_t      dma_handle;
2504         logdrv_param    *lparam;
2505         megacmd_t       mc;
2506         char            *disk_array;
2507         dma_addr_t      disk_array_dma_handle;
2508         caddr_t         inquiry;
2509         struct pci_dev  *pdev;
2510         u8      *rdrv_state;
2511         int     num_ldrv;
2512         u32     array_sz;
2513         int     i;
2514
2515         if( make_local_pdev(adapter, &pdev) != 0 )
2516                 return 0;
2517
2518         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2519                 goto free_pdev;
2520
2521         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2522                 seq_puts(m, "Adapter inquiry failed.\n");
2523                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2524                 goto free_inquiry;
2525         }
2526
2527         memset(&mc, 0, sizeof(megacmd_t));
2528
2529         if( adapter->flag & BOARD_40LD ) {
2530                 array_sz = sizeof(disk_array_40ld);
2531
2532                 rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
2533
2534                 num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
2535         }
2536         else {
2537                 array_sz = sizeof(disk_array_8ld);
2538
2539                 rdrv_state = ((mraid_ext_inquiry *)inquiry)->
2540                         raid_inq.logdrv_info.ldrv_state;
2541
2542                 num_ldrv = ((mraid_ext_inquiry *)inquiry)->
2543                         raid_inq.logdrv_info.num_ldrv;
2544         }
2545
2546         disk_array = pci_alloc_consistent(pdev, array_sz,
2547                         &disk_array_dma_handle);
2548
2549         if( disk_array == NULL ) {
2550                 seq_puts(m, "memory not available.\n");
2551                 goto free_inquiry;
2552         }
2553
2554         mc.xferaddr = (u32)disk_array_dma_handle;
2555
2556         if( adapter->flag & BOARD_40LD ) {
2557                 mc.cmd = FC_NEW_CONFIG;
2558                 mc.opcode = OP_DCMD_READ_CONFIG;
2559
2560                 if( mega_internal_command(adapter, &mc, NULL) ) {
2561                         seq_puts(m, "40LD read config failed.\n");
2562                         goto free_pci;
2563                 }
2564
2565         }
2566         else {
2567                 mc.cmd = NEW_READ_CONFIG_8LD;
2568
2569                 if( mega_internal_command(adapter, &mc, NULL) ) {
2570                         mc.cmd = READ_CONFIG_8LD;
2571                         if( mega_internal_command(adapter, &mc, NULL) ) {
2572                                 seq_puts(m, "8LD read config failed.\n");
2573                                 goto free_pci;
2574                         }
2575                 }
2576         }
2577
2578         for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
2579
2580                 if( adapter->flag & BOARD_40LD ) {
2581                         lparam =
2582                         &((disk_array_40ld *)disk_array)->ldrv[i].lparam;
2583                 }
2584                 else {
2585                         lparam =
2586                         &((disk_array_8ld *)disk_array)->ldrv[i].lparam;
2587                 }
2588
2589                 /*
2590                  * Check for overflow. We print less than 240 characters for
2591                  * information about each logical drive.
2592                  */
2593                 seq_printf(m, "Logical drive:%2d:, ", i);
2594
2595                 switch( rdrv_state[i] & 0x0F ) {
2596                 case RDRV_OFFLINE:
2597                         seq_puts(m, "state: offline");
2598                         break;
2599                 case RDRV_DEGRADED:
2600                         seq_puts(m, "state: degraded");
2601                         break;
2602                 case RDRV_OPTIMAL:
2603                         seq_puts(m, "state: optimal");
2604                         break;
2605                 case RDRV_DELETED:
2606                         seq_puts(m, "state: deleted");
2607                         break;
2608                 default:
2609                         seq_puts(m, "state: unknown");
2610                         break;
2611                 }
2612
2613                 /*
2614                  * Check if check consistency or initialization is going on
2615                  * for this logical drive.
2616                  */
2617                 if( (rdrv_state[i] & 0xF0) == 0x20 )
2618                         seq_puts(m, ", check-consistency in progress");
2619                 else if( (rdrv_state[i] & 0xF0) == 0x10 )
2620                         seq_puts(m, ", initialization in progress");
2621
2622                 seq_putc(m, '\n');
2623
2624                 seq_printf(m, "Span depth:%3d, ", lparam->span_depth);
2625                 seq_printf(m, "RAID level:%3d, ", lparam->level);
2626                 seq_printf(m, "Stripe size:%3d, ",
2627                            lparam->stripe_sz ? lparam->stripe_sz/2: 128);
2628                 seq_printf(m, "Row size:%3d\n", lparam->row_size);
2629
2630                 seq_puts(m, "Read Policy: ");
2631                 switch(lparam->read_ahead) {
2632                 case NO_READ_AHEAD:
2633                         seq_puts(m, "No read ahead, ");
2634                         break;
2635                 case READ_AHEAD:
2636                         seq_puts(m, "Read ahead, ");
2637                         break;
2638                 case ADAP_READ_AHEAD:
2639                         seq_puts(m, "Adaptive, ");
2640                         break;
2641
2642                 }
2643
2644                 seq_puts(m, "Write Policy: ");
2645                 switch(lparam->write_mode) {
2646                 case WRMODE_WRITE_THRU:
2647                         seq_puts(m, "Write thru, ");
2648                         break;
2649                 case WRMODE_WRITE_BACK:
2650                         seq_puts(m, "Write back, ");
2651                         break;
2652                 }
2653
2654                 seq_puts(m, "Cache Policy: ");
2655                 switch(lparam->direct_io) {
2656                 case CACHED_IO:
2657                         seq_puts(m, "Cached IO\n\n");
2658                         break;
2659                 case DIRECT_IO:
2660                         seq_puts(m, "Direct IO\n\n");
2661                         break;
2662                 }
2663         }
2664
2665 free_pci:
2666         pci_free_consistent(pdev, array_sz, disk_array,
2667                         disk_array_dma_handle);
2668 free_inquiry:
2669         mega_free_inquiry(inquiry, dma_handle, pdev);
2670 free_pdev:
2671         free_local_pdev(pdev);
2672         return 0;
2673 }
2674
2675 /**
2676  * proc_show_rdrv_10()
2677  * @m - Synthetic file construction data
2678  * @v - File iterator
2679  *
2680  * Display real time information about the logical drives 0 through 9.
2681  */
2682 static int
2683 proc_show_rdrv_10(struct seq_file *m, void *v)
2684 {
2685         return proc_show_rdrv(m, m->private, 0, 9);
2686 }
2687
2688
2689 /**
2690  * proc_show_rdrv_20()
2691  * @m - Synthetic file construction data
2692  * @v - File iterator
2693  *
2694  * Display real time information about the logical drives 0 through 9.
2695  */
2696 static int
2697 proc_show_rdrv_20(struct seq_file *m, void *v)
2698 {
2699         return proc_show_rdrv(m, m->private, 10, 19);
2700 }
2701
2702
2703 /**
2704  * proc_show_rdrv_30()
2705  * @m - Synthetic file construction data
2706  * @v - File iterator
2707  *
2708  * Display real time information about the logical drives 0 through 9.
2709  */
2710 static int
2711 proc_show_rdrv_30(struct seq_file *m, void *v)
2712 {
2713         return proc_show_rdrv(m, m->private, 20, 29);
2714 }
2715
2716
2717 /**
2718  * proc_show_rdrv_40()
2719  * @m - Synthetic file construction data
2720  * @v - File iterator
2721  *
2722  * Display real time information about the logical drives 0 through 9.
2723  */
2724 static int
2725 proc_show_rdrv_40(struct seq_file *m, void *v)
2726 {
2727         return proc_show_rdrv(m, m->private, 30, 39);
2728 }
2729
2730 /**
2731  * mega_create_proc_entry()
2732  * @index - index in soft state array
2733  * @parent - parent node for this /proc entry
2734  *
2735  * Creates /proc entries for our controllers.
2736  */
2737 static void
2738 mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2739 {
2740         adapter_t *adapter = hba_soft_state[index];
2741         struct proc_dir_entry *dir;
2742         u8 string[16];
2743
2744         sprintf(string, "hba%d", adapter->host->host_no);
2745         dir = proc_mkdir_data(string, 0, parent, adapter);
2746         if (!dir) {
2747                 dev_warn(&adapter->dev->dev, "proc_mkdir failed\n");
2748                 return;
2749         }
2750
2751         proc_create_single_data("config", S_IRUSR, dir,
2752                         proc_show_config, adapter);
2753         proc_create_single_data("stat", S_IRUSR, dir,
2754                         proc_show_stat, adapter);
2755         proc_create_single_data("mailbox", S_IRUSR, dir,
2756                         proc_show_mbox, adapter);
2757 #if MEGA_HAVE_ENH_PROC
2758         proc_create_single_data("rebuild-rate", S_IRUSR, dir,
2759                         proc_show_rebuild_rate, adapter);
2760         proc_create_single_data("battery-status", S_IRUSR, dir,
2761                         proc_show_battery, adapter);
2762         proc_create_single_data("diskdrives-ch0", S_IRUSR, dir,
2763                         proc_show_pdrv_ch0, adapter);
2764         proc_create_single_data("diskdrives-ch1", S_IRUSR, dir,
2765                         proc_show_pdrv_ch1, adapter);
2766         proc_create_single_data("diskdrives-ch2", S_IRUSR, dir,
2767                         proc_show_pdrv_ch2, adapter);
2768         proc_create_single_data("diskdrives-ch3", S_IRUSR, dir,
2769                         proc_show_pdrv_ch3, adapter);
2770         proc_create_single_data("raiddrives-0-9", S_IRUSR, dir,
2771                         proc_show_rdrv_10, adapter);
2772         proc_create_single_data("raiddrives-10-19", S_IRUSR, dir,
2773                         proc_show_rdrv_20, adapter);
2774         proc_create_single_data("raiddrives-20-29", S_IRUSR, dir,
2775                         proc_show_rdrv_30, adapter);
2776         proc_create_single_data("raiddrives-30-39", S_IRUSR, dir,
2777                         proc_show_rdrv_40, adapter);
2778 #endif
2779 }
2780
2781 #else
2782 static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2783 {
2784 }
2785 #endif
2786
2787
2788 /**
2789  * megaraid_biosparam()
2790  *
2791  * Return the disk geometry for a particular disk
2792  */
2793 static int
2794 megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
2795                     sector_t capacity, int geom[])
2796 {
2797         adapter_t       *adapter;
2798         unsigned char   *bh;
2799         int     heads;
2800         int     sectors;
2801         int     cylinders;
2802         int     rval;
2803
2804         /* Get pointer to host config structure */
2805         adapter = (adapter_t *)sdev->host->hostdata;
2806
2807         if (IS_RAID_CH(adapter, sdev->channel)) {
2808                         /* Default heads (64) & sectors (32) */
2809                         heads = 64;
2810                         sectors = 32;
2811                         cylinders = (ulong)capacity / (heads * sectors);
2812
2813                         /*
2814                          * Handle extended translation size for logical drives
2815                          * > 1Gb
2816                          */
2817                         if ((ulong)capacity >= 0x200000) {
2818                                 heads = 255;
2819                                 sectors = 63;
2820                                 cylinders = (ulong)capacity / (heads * sectors);
2821                         }
2822
2823                         /* return result */
2824                         geom[0] = heads;
2825                         geom[1] = sectors;
2826                         geom[2] = cylinders;
2827         }
2828         else {
2829                 bh = scsi_bios_ptable(bdev);
2830
2831                 if( bh ) {
2832                         rval = scsi_partsize(bh, capacity,
2833                                             &geom[2], &geom[0], &geom[1]);
2834                         kfree(bh);
2835                         if( rval != -1 )
2836                                 return rval;
2837                 }
2838
2839                 dev_info(&adapter->dev->dev,
2840                          "invalid partition on this disk on channel %d\n",
2841                          sdev->channel);
2842
2843                 /* Default heads (64) & sectors (32) */
2844                 heads = 64;
2845                 sectors = 32;
2846                 cylinders = (ulong)capacity / (heads * sectors);
2847
2848                 /* Handle extended translation size for logical drives > 1Gb */
2849                 if ((ulong)capacity >= 0x200000) {
2850                         heads = 255;
2851                         sectors = 63;
2852                         cylinders = (ulong)capacity / (heads * sectors);
2853                 }
2854
2855                 /* return result */
2856                 geom[0] = heads;
2857                 geom[1] = sectors;
2858                 geom[2] = cylinders;
2859         }
2860
2861         return 0;
2862 }
2863
2864 /**
2865  * mega_init_scb()
2866  * @adapter - pointer to our soft state
2867  *
2868  * Allocate memory for the various pointers in the scb structures:
2869  * scatter-gather list pointer, passthru and extended passthru structure
2870  * pointers.
2871  */
2872 static int
2873 mega_init_scb(adapter_t *adapter)
2874 {
2875         scb_t   *scb;
2876         int     i;
2877
2878         for( i = 0; i < adapter->max_cmds; i++ ) {
2879
2880                 scb = &adapter->scb_list[i];
2881
2882                 scb->sgl64 = NULL;
2883                 scb->sgl = NULL;
2884                 scb->pthru = NULL;
2885                 scb->epthru = NULL;
2886         }
2887
2888         for( i = 0; i < adapter->max_cmds; i++ ) {
2889
2890                 scb = &adapter->scb_list[i];
2891
2892                 scb->idx = i;
2893
2894                 scb->sgl64 = pci_alloc_consistent(adapter->dev,
2895                                 sizeof(mega_sgl64) * adapter->sglen,
2896                                 &scb->sgl_dma_addr);
2897
2898                 scb->sgl = (mega_sglist *)scb->sgl64;
2899
2900                 if( !scb->sgl ) {
2901                         dev_warn(&adapter->dev->dev, "RAID: Can't allocate sglist\n");
2902                         mega_free_sgl(adapter);
2903                         return -1;
2904                 }
2905
2906                 scb->pthru = pci_alloc_consistent(adapter->dev,
2907                                 sizeof(mega_passthru),
2908                                 &scb->pthru_dma_addr);
2909
2910                 if( !scb->pthru ) {
2911                         dev_warn(&adapter->dev->dev, "RAID: Can't allocate passthru\n");
2912                         mega_free_sgl(adapter);
2913                         return -1;
2914                 }
2915
2916                 scb->epthru = pci_alloc_consistent(adapter->dev,
2917                                 sizeof(mega_ext_passthru),
2918                                 &scb->epthru_dma_addr);
2919
2920                 if( !scb->epthru ) {
2921                         dev_warn(&adapter->dev->dev,
2922                                 "Can't allocate extended passthru\n");
2923                         mega_free_sgl(adapter);
2924                         return -1;
2925                 }
2926
2927
2928                 scb->dma_type = MEGA_DMA_TYPE_NONE;
2929
2930                 /*
2931                  * Link to free list
2932                  * lock not required since we are loading the driver, so no
2933                  * commands possible right now.
2934                  */
2935                 scb->state = SCB_FREE;
2936                 scb->cmd = NULL;
2937                 list_add(&scb->list, &adapter->free_list);
2938         }
2939
2940         return 0;
2941 }
2942
2943
2944 /**
2945  * megadev_open()
2946  * @inode - unused
2947  * @filep - unused
2948  *
2949  * Routines for the character/ioctl interface to the driver. Find out if this
2950  * is a valid open.
2951  */
2952 static int
2953 megadev_open (struct inode *inode, struct file *filep)
2954 {
2955         /*
2956          * Only allow superuser to access private ioctl interface
2957          */
2958         if( !capable(CAP_SYS_ADMIN) ) return -EACCES;
2959
2960         return 0;
2961 }
2962
2963
2964 /**
2965  * megadev_ioctl()
2966  * @inode - Our device inode
2967  * @filep - unused
2968  * @cmd - ioctl command
2969  * @arg - user buffer
2970  *
2971  * ioctl entry point for our private ioctl interface. We move the data in from
2972  * the user space, prepare the command (if necessary, convert the old MIMD
2973  * ioctl to new ioctl command), and issue a synchronous command to the
2974  * controller.
2975  */
2976 static int
2977 megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
2978 {
2979         adapter_t       *adapter;
2980         nitioctl_t      uioc;
2981         int             adapno;
2982         int             rval;
2983         mega_passthru   __user *upthru; /* user address for passthru */
2984         mega_passthru   *pthru;         /* copy user passthru here */
2985         dma_addr_t      pthru_dma_hndl;
2986         void            *data = NULL;   /* data to be transferred */
2987         dma_addr_t      data_dma_hndl;  /* dma handle for data xfer area */
2988         megacmd_t       mc;
2989         megastat_t      __user *ustats;
2990         int             num_ldrv;
2991         u32             uxferaddr = 0;
2992         struct pci_dev  *pdev;
2993
2994         ustats = NULL; /* avoid compilation warnings */
2995         num_ldrv = 0;
2996
2997         /*
2998          * Make sure only USCSICMD are issued through this interface.
2999          * MIMD application would still fire different command.
3000          */
3001         if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
3002                 return -EINVAL;
3003         }
3004
3005         /*
3006          * Check and convert a possible MIMD command to NIT command.
3007          * mega_m_to_n() copies the data from the user space, so we do not
3008          * have to do it here.
3009          * NOTE: We will need some user address to copyout the data, therefore
3010          * the inteface layer will also provide us with the required user
3011          * addresses.
3012          */
3013         memset(&uioc, 0, sizeof(nitioctl_t));
3014         if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
3015                 return rval;
3016
3017
3018         switch( uioc.opcode ) {
3019
3020         case GET_DRIVER_VER:
3021                 if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
3022                         return (-EFAULT);
3023
3024                 break;
3025
3026         case GET_N_ADAP:
3027                 if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
3028                         return (-EFAULT);
3029
3030                 /*
3031                  * Shucks. MIMD interface returns a positive value for number
3032                  * of adapters. TODO: Change it to return 0 when there is no
3033                  * applicatio using mimd interface.
3034                  */
3035                 return hba_count;
3036
3037         case GET_ADAP_INFO:
3038
3039                 /*
3040                  * Which adapter
3041                  */
3042                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3043                         return (-ENODEV);
3044
3045                 if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
3046                                 sizeof(struct mcontroller)) )
3047                         return (-EFAULT);
3048                 break;
3049
3050 #if MEGA_HAVE_STATS
3051
3052         case GET_STATS:
3053                 /*
3054                  * Which adapter
3055                  */
3056                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3057                         return (-ENODEV);
3058
3059                 adapter = hba_soft_state[adapno];
3060
3061                 ustats = uioc.uioc_uaddr;
3062
3063                 if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
3064                         return (-EFAULT);
3065
3066                 /*
3067                  * Check for the validity of the logical drive number
3068                  */
3069                 if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
3070
3071                 if( copy_to_user(ustats->nreads, adapter->nreads,
3072                                         num_ldrv*sizeof(u32)) )
3073                         return -EFAULT;
3074
3075                 if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
3076                                         num_ldrv*sizeof(u32)) )
3077                         return -EFAULT;
3078
3079                 if( copy_to_user(ustats->nwrites, adapter->nwrites,
3080                                         num_ldrv*sizeof(u32)) )
3081                         return -EFAULT;
3082
3083                 if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
3084                                         num_ldrv*sizeof(u32)) )
3085                         return -EFAULT;
3086
3087                 if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
3088                                         num_ldrv*sizeof(u32)) )
3089                         return -EFAULT;
3090
3091                 if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
3092                                         num_ldrv*sizeof(u32)) )
3093                         return -EFAULT;
3094
3095                 return 0;
3096
3097 #endif
3098         case MBOX_CMD:
3099
3100                 /*
3101                  * Which adapter
3102                  */
3103                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3104                         return (-ENODEV);
3105
3106                 adapter = hba_soft_state[adapno];
3107
3108                 /*
3109                  * Deletion of logical drive is a special case. The adapter
3110                  * should be quiescent before this command is issued.
3111                  */
3112                 if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
3113                                 uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
3114
3115                         /*
3116                          * Do we support this feature
3117                          */
3118                         if( !adapter->support_random_del ) {
3119                                 dev_warn(&adapter->dev->dev, "logdrv "
3120                                         "delete on non-supporting F/W\n");
3121
3122                                 return (-EINVAL);
3123                         }
3124
3125                         rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
3126
3127                         if( rval == 0 ) {
3128                                 memset(&mc, 0, sizeof(megacmd_t));
3129
3130                                 mc.status = rval;
3131
3132                                 rval = mega_n_to_m((void __user *)arg, &mc);
3133                         }
3134
3135                         return rval;
3136                 }
3137                 /*
3138                  * This interface only support the regular passthru commands.
3139                  * Reject extended passthru and 64-bit passthru
3140                  */
3141                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
3142                         uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
3143
3144                         dev_warn(&adapter->dev->dev, "rejected passthru\n");
3145
3146                         return (-EINVAL);
3147                 }
3148
3149                 /*
3150                  * For all internal commands, the buffer must be allocated in
3151                  * <4GB address range
3152                  */
3153                 if( make_local_pdev(adapter, &pdev) != 0 )
3154                         return -EIO;
3155
3156                 /* Is it a passthru command or a DCMD */
3157                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
3158                         /* Passthru commands */
3159
3160                         pthru = pci_alloc_consistent(pdev,
3161                                         sizeof(mega_passthru),
3162                                         &pthru_dma_hndl);
3163
3164                         if( pthru == NULL ) {
3165                                 free_local_pdev(pdev);
3166                                 return (-ENOMEM);
3167                         }
3168
3169                         /*
3170                          * The user passthru structure
3171                          */
3172                         upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr;
3173
3174                         /*
3175                          * Copy in the user passthru here.
3176                          */
3177                         if( copy_from_user(pthru, upthru,
3178                                                 sizeof(mega_passthru)) ) {
3179
3180                                 pci_free_consistent(pdev,
3181                                                 sizeof(mega_passthru), pthru,
3182                                                 pthru_dma_hndl);
3183
3184                                 free_local_pdev(pdev);
3185
3186                                 return (-EFAULT);
3187                         }
3188
3189                         /*
3190                          * Is there a data transfer
3191                          */
3192                         if( pthru->dataxferlen ) {
3193                                 data = pci_alloc_consistent(pdev,
3194                                                 pthru->dataxferlen,
3195                                                 &data_dma_hndl);
3196
3197                                 if( data == NULL ) {
3198                                         pci_free_consistent(pdev,
3199                                                         sizeof(mega_passthru),
3200                                                         pthru,
3201                                                         pthru_dma_hndl);
3202
3203                                         free_local_pdev(pdev);
3204
3205                                         return (-ENOMEM);
3206                                 }
3207
3208                                 /*
3209                                  * Save the user address and point the kernel
3210                                  * address at just allocated memory
3211                                  */
3212                                 uxferaddr = pthru->dataxferaddr;
3213                                 pthru->dataxferaddr = data_dma_hndl;
3214                         }
3215
3216
3217                         /*
3218                          * Is data coming down-stream
3219                          */
3220                         if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) {
3221                                 /*
3222                                  * Get the user data
3223                                  */
3224                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3225                                                         pthru->dataxferlen) ) {
3226                                         rval = (-EFAULT);
3227                                         goto freemem_and_return;
3228                                 }
3229                         }
3230
3231                         memset(&mc, 0, sizeof(megacmd_t));
3232
3233                         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
3234                         mc.xferaddr = (u32)pthru_dma_hndl;
3235
3236                         /*
3237                          * Issue the command
3238                          */
3239                         mega_internal_command(adapter, &mc, pthru);
3240
3241                         rval = mega_n_to_m((void __user *)arg, &mc);
3242
3243                         if( rval ) goto freemem_and_return;
3244
3245
3246                         /*
3247                          * Is data going up-stream
3248                          */
3249                         if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
3250                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3251                                                         pthru->dataxferlen) ) {
3252                                         rval = (-EFAULT);
3253                                 }
3254                         }
3255
3256                         /*
3257                          * Send the request sense data also, irrespective of
3258                          * whether the user has asked for it or not.
3259                          */
3260                         if (copy_to_user(upthru->reqsensearea,
3261                                         pthru->reqsensearea, 14))
3262                                 rval = -EFAULT;
3263
3264 freemem_and_return:
3265                         if( pthru->dataxferlen ) {
3266                                 pci_free_consistent(pdev,
3267                                                 pthru->dataxferlen, data,
3268                                                 data_dma_hndl);
3269                         }
3270
3271                         pci_free_consistent(pdev, sizeof(mega_passthru),
3272                                         pthru, pthru_dma_hndl);
3273
3274                         free_local_pdev(pdev);
3275
3276                         return rval;
3277                 }
3278                 else {
3279                         /* DCMD commands */
3280
3281                         /*
3282                          * Is there a data transfer
3283                          */
3284                         if( uioc.xferlen ) {
3285                                 data = pci_alloc_consistent(pdev,
3286                                                 uioc.xferlen, &data_dma_hndl);
3287
3288                                 if( data == NULL ) {
3289                                         free_local_pdev(pdev);
3290                                         return (-ENOMEM);
3291                                 }
3292
3293                                 uxferaddr = MBOX(uioc)->xferaddr;
3294                         }
3295
3296                         /*
3297                          * Is data coming down-stream
3298                          */
3299                         if( uioc.xferlen && (uioc.flags & UIOC_WR) ) {
3300                                 /*
3301                                  * Get the user data
3302                                  */
3303                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3304                                                         uioc.xferlen) ) {
3305
3306                                         pci_free_consistent(pdev,
3307                                                         uioc.xferlen,
3308                                                         data, data_dma_hndl);
3309
3310                                         free_local_pdev(pdev);
3311
3312                                         return (-EFAULT);
3313                                 }
3314                         }
3315
3316                         memcpy(&mc, MBOX(uioc), sizeof(megacmd_t));
3317
3318                         mc.xferaddr = (u32)data_dma_hndl;
3319
3320                         /*
3321                          * Issue the command
3322                          */
3323                         mega_internal_command(adapter, &mc, NULL);
3324
3325                         rval = mega_n_to_m((void __user *)arg, &mc);
3326
3327                         if( rval ) {
3328                                 if( uioc.xferlen ) {
3329                                         pci_free_consistent(pdev,
3330                                                         uioc.xferlen, data,
3331                                                         data_dma_hndl);
3332                                 }
3333
3334                                 free_local_pdev(pdev);
3335
3336                                 return rval;
3337                         }
3338
3339                         /*
3340                          * Is data going up-stream
3341                          */
3342                         if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
3343                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3344                                                         uioc.xferlen) ) {
3345
3346                                         rval = (-EFAULT);
3347                                 }
3348                         }
3349
3350                         if( uioc.xferlen ) {
3351                                 pci_free_consistent(pdev,
3352                                                 uioc.xferlen, data,
3353                                                 data_dma_hndl);
3354                         }
3355
3356                         free_local_pdev(pdev);
3357
3358                         return rval;
3359                 }
3360
3361         default:
3362                 return (-EINVAL);
3363         }
3364
3365         return 0;
3366 }
3367
3368 static long
3369 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3370 {
3371         int ret;
3372
3373         mutex_lock(&megadev_mutex);
3374         ret = megadev_ioctl(filep, cmd, arg);
3375         mutex_unlock(&megadev_mutex);
3376
3377         return ret;
3378 }
3379
3380 /**
3381  * mega_m_to_n()
3382  * @arg - user address
3383  * @uioc - new ioctl structure
3384  *
3385  * A thin layer to convert older mimd interface ioctl structure to NIT ioctl
3386  * structure
3387  *
3388  * Converts the older mimd ioctl structure to newer NIT structure
3389  */
3390 static int
3391 mega_m_to_n(void __user *arg, nitioctl_t *uioc)
3392 {
3393         struct uioctl_t uioc_mimd;
3394         char    signature[8] = {0};
3395         u8      opcode;
3396         u8      subopcode;
3397
3398
3399         /*
3400          * check is the application conforms to NIT. We do not have to do much
3401          * in that case.
3402          * We exploit the fact that the signature is stored in the very
3403          * beginning of the structure.
3404          */
3405
3406         if( copy_from_user(signature, arg, 7) )
3407                 return (-EFAULT);
3408
3409         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3410
3411                 /*
3412                  * NOTE NOTE: The nit ioctl is still under flux because of
3413                  * change of mailbox definition, in HPE. No applications yet
3414                  * use this interface and let's not have applications use this
3415                  * interface till the new specifitions are in place.
3416                  */
3417                 return -EINVAL;
3418 #if 0
3419                 if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
3420                         return (-EFAULT);
3421                 return 0;
3422 #endif
3423         }
3424
3425         /*
3426          * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
3427          *
3428          * Get the user ioctl structure
3429          */
3430         if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
3431                 return (-EFAULT);
3432
3433
3434         /*
3435          * Get the opcode and subopcode for the commands
3436          */
3437         opcode = uioc_mimd.ui.fcs.opcode;
3438         subopcode = uioc_mimd.ui.fcs.subopcode;
3439
3440         switch (opcode) {
3441         case 0x82:
3442
3443                 switch (subopcode) {
3444
3445                 case MEGAIOC_QDRVRVER:  /* Query driver version */
3446                         uioc->opcode = GET_DRIVER_VER;
3447                         uioc->uioc_uaddr = uioc_mimd.data;
3448                         break;
3449
3450                 case MEGAIOC_QNADAP:    /* Get # of adapters */
3451                         uioc->opcode = GET_N_ADAP;
3452                         uioc->uioc_uaddr = uioc_mimd.data;
3453                         break;
3454
3455                 case MEGAIOC_QADAPINFO: /* Get adapter information */
3456                         uioc->opcode = GET_ADAP_INFO;
3457                         uioc->adapno = uioc_mimd.ui.fcs.adapno;
3458                         uioc->uioc_uaddr = uioc_mimd.data;
3459                         break;
3460
3461                 default:
3462                         return(-EINVAL);
3463                 }
3464
3465                 break;
3466
3467
3468         case 0x81:
3469
3470                 uioc->opcode = MBOX_CMD;
3471                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3472
3473                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3474
3475                 uioc->xferlen = uioc_mimd.ui.fcs.length;
3476
3477                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3478                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3479
3480                 break;
3481
3482         case 0x80:
3483
3484                 uioc->opcode = MBOX_CMD;
3485                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3486
3487                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3488
3489                 /*
3490                  * Choose the xferlen bigger of input and output data
3491                  */
3492                 uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
3493                         uioc_mimd.outlen : uioc_mimd.inlen;
3494
3495                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3496                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3497
3498                 break;
3499
3500         default:
3501                 return (-EINVAL);
3502
3503         }
3504
3505         return 0;
3506 }
3507
3508 /*
3509  * mega_n_to_m()
3510  * @arg - user address
3511  * @mc - mailbox command
3512  *
3513  * Updates the status information to the application, depending on application
3514  * conforms to older mimd ioctl interface or newer NIT ioctl interface
3515  */
3516 static int
3517 mega_n_to_m(void __user *arg, megacmd_t *mc)
3518 {
3519         nitioctl_t      __user *uiocp;
3520         megacmd_t       __user *umc;
3521         mega_passthru   __user *upthru;
3522         struct uioctl_t __user *uioc_mimd;
3523         char    signature[8] = {0};
3524
3525         /*
3526          * check is the application conforms to NIT.
3527          */
3528         if( copy_from_user(signature, arg, 7) )
3529                 return -EFAULT;
3530
3531         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3532
3533                 uiocp = arg;
3534
3535                 if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
3536                         return (-EFAULT);
3537
3538                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3539
3540                         umc = MBOX_P(uiocp);
3541
3542                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3543                                 return -EFAULT;
3544
3545                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
3546                                 return (-EFAULT);
3547                 }
3548         }
3549         else {
3550                 uioc_mimd = arg;
3551
3552                 if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
3553                         return (-EFAULT);
3554
3555                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3556
3557                         umc = (megacmd_t __user *)uioc_mimd->mbox;
3558
3559                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3560                                 return (-EFAULT);
3561
3562                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
3563                                 return (-EFAULT);
3564                 }
3565         }
3566
3567         return 0;
3568 }
3569
3570
3571 /*
3572  * MEGARAID 'FW' commands.
3573  */
3574
3575 /**
3576  * mega_is_bios_enabled()
3577  * @adapter - pointer to our soft state
3578  *
3579  * issue command to find out if the BIOS is enabled for this controller
3580  */
3581 static int
3582 mega_is_bios_enabled(adapter_t *adapter)
3583 {
3584         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3585         mbox_t  *mbox;
3586         int     ret;
3587
3588         mbox = (mbox_t *)raw_mbox;
3589
3590         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3591
3592         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3593
3594         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3595
3596         raw_mbox[0] = IS_BIOS_ENABLED;
3597         raw_mbox[2] = GET_BIOS;
3598
3599
3600         ret = issue_scb_block(adapter, raw_mbox);
3601
3602         return *(char *)adapter->mega_buffer;
3603 }
3604
3605
3606 /**
3607  * mega_enum_raid_scsi()
3608  * @adapter - pointer to our soft state
3609  *
3610  * Find out what channels are RAID/SCSI. This information is used to
3611  * differentiate the virtual channels and physical channels and to support
3612  * ROMB feature and non-disk devices.
3613  */
3614 static void
3615 mega_enum_raid_scsi(adapter_t *adapter)
3616 {
3617         unsigned char raw_mbox[sizeof(struct mbox_out)];
3618         mbox_t *mbox;
3619         int i;
3620
3621         mbox = (mbox_t *)raw_mbox;
3622
3623         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3624
3625         /*
3626          * issue command to find out what channels are raid/scsi
3627          */
3628         raw_mbox[0] = CHNL_CLASS;
3629         raw_mbox[2] = GET_CHNL_CLASS;
3630
3631         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3632
3633         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3634
3635         /*
3636          * Non-ROMB firmware fail this command, so all channels
3637          * must be shown RAID
3638          */
3639         adapter->mega_ch_class = 0xFF;
3640
3641         if(!issue_scb_block(adapter, raw_mbox)) {
3642                 adapter->mega_ch_class = *((char *)adapter->mega_buffer);
3643
3644         }
3645
3646         for( i = 0; i < adapter->product_info.nchannels; i++ ) {
3647                 if( (adapter->mega_ch_class >> i) & 0x01 ) {
3648                         dev_info(&adapter->dev->dev, "channel[%d] is raid\n",
3649                                         i);
3650                 }
3651                 else {
3652                         dev_info(&adapter->dev->dev, "channel[%d] is scsi\n",
3653                                         i);
3654                 }
3655         }
3656
3657         return;
3658 }
3659
3660
3661 /**
3662  * mega_get_boot_drv()
3663  * @adapter - pointer to our soft state
3664  *
3665  * Find out which device is the boot device. Note, any logical drive or any
3666  * phyical device (e.g., a CDROM) can be designated as a boot device.
3667  */
3668 static void
3669 mega_get_boot_drv(adapter_t *adapter)
3670 {
3671         struct private_bios_data        *prv_bios_data;
3672         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3673         mbox_t  *mbox;
3674         u16     cksum = 0;
3675         u8      *cksum_p;
3676         u8      boot_pdrv;
3677         int     i;
3678
3679         mbox = (mbox_t *)raw_mbox;
3680
3681         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3682
3683         raw_mbox[0] = BIOS_PVT_DATA;
3684         raw_mbox[2] = GET_BIOS_PVT_DATA;
3685
3686         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3687
3688         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3689
3690         adapter->boot_ldrv_enabled = 0;
3691         adapter->boot_ldrv = 0;
3692
3693         adapter->boot_pdrv_enabled = 0;
3694         adapter->boot_pdrv_ch = 0;
3695         adapter->boot_pdrv_tgt = 0;
3696
3697         if(issue_scb_block(adapter, raw_mbox) == 0) {
3698                 prv_bios_data =
3699                         (struct private_bios_data *)adapter->mega_buffer;
3700
3701                 cksum = 0;
3702                 cksum_p = (char *)prv_bios_data;
3703                 for (i = 0; i < 14; i++ ) {
3704                         cksum += (u16)(*cksum_p++);
3705                 }
3706
3707                 if (prv_bios_data->cksum == (u16)(0-cksum) ) {
3708
3709                         /*
3710                          * If MSB is set, a physical drive is set as boot
3711                          * device
3712                          */
3713                         if( prv_bios_data->boot_drv & 0x80 ) {
3714                                 adapter->boot_pdrv_enabled = 1;
3715                                 boot_pdrv = prv_bios_data->boot_drv & 0x7F;
3716                                 adapter->boot_pdrv_ch = boot_pdrv / 16;
3717                                 adapter->boot_pdrv_tgt = boot_pdrv % 16;
3718                         }
3719                         else {
3720                                 adapter->boot_ldrv_enabled = 1;
3721                                 adapter->boot_ldrv = prv_bios_data->boot_drv;
3722                         }
3723                 }
3724         }
3725
3726 }
3727
3728 /**
3729  * mega_support_random_del()
3730  * @adapter - pointer to our soft state
3731  *
3732  * Find out if this controller supports random deletion and addition of
3733  * logical drives
3734  */
3735 static int
3736 mega_support_random_del(adapter_t *adapter)
3737 {
3738         unsigned char raw_mbox[sizeof(struct mbox_out)];
3739         mbox_t *mbox;
3740         int rval;
3741
3742         mbox = (mbox_t *)raw_mbox;
3743
3744         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3745
3746         /*
3747          * issue command
3748          */
3749         raw_mbox[0] = FC_DEL_LOGDRV;
3750         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3751
3752         rval = issue_scb_block(adapter, raw_mbox);
3753
3754         return !rval;
3755 }
3756
3757
3758 /**
3759  * mega_support_ext_cdb()
3760  * @adapter - pointer to our soft state
3761  *
3762  * Find out if this firmware support cdblen > 10
3763  */
3764 static int
3765 mega_support_ext_cdb(adapter_t *adapter)
3766 {
3767         unsigned char raw_mbox[sizeof(struct mbox_out)];
3768         mbox_t *mbox;
3769         int rval;
3770
3771         mbox = (mbox_t *)raw_mbox;
3772
3773         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3774         /*
3775          * issue command to find out if controller supports extended CDBs.
3776          */
3777         raw_mbox[0] = 0xA4;
3778         raw_mbox[2] = 0x16;
3779
3780         rval = issue_scb_block(adapter, raw_mbox);
3781
3782         return !rval;
3783 }
3784
3785
3786 /**
3787  * mega_del_logdrv()
3788  * @adapter - pointer to our soft state
3789  * @logdrv - logical drive to be deleted
3790  *
3791  * Delete the specified logical drive. It is the responsibility of the user
3792  * app to let the OS know about this operation.
3793  */
3794 static int
3795 mega_del_logdrv(adapter_t *adapter, int logdrv)
3796 {
3797         unsigned long flags;
3798         scb_t *scb;
3799         int rval;
3800
3801         /*
3802          * Stop sending commands to the controller, queue them internally.
3803          * When deletion is complete, ISR will flush the queue.
3804          */
3805         atomic_set(&adapter->quiescent, 1);
3806
3807         /*
3808          * Wait till all the issued commands are complete and there are no
3809          * commands in the pending queue
3810          */
3811         while (atomic_read(&adapter->pend_cmds) > 0 ||
3812                !list_empty(&adapter->pending_list))
3813                 msleep(1000);   /* sleep for 1s */
3814
3815         rval = mega_do_del_logdrv(adapter, logdrv);
3816
3817         spin_lock_irqsave(&adapter->lock, flags);
3818
3819         /*
3820          * If delete operation was successful, add 0x80 to the logical drive
3821          * ids for commands in the pending queue.
3822          */
3823         if (adapter->read_ldidmap) {
3824                 struct list_head *pos;
3825                 list_for_each(pos, &adapter->pending_list) {
3826                         scb = list_entry(pos, scb_t, list);
3827                         if (scb->pthru->logdrv < 0x80 )
3828                                 scb->pthru->logdrv += 0x80;
3829                 }
3830         }
3831
3832         atomic_set(&adapter->quiescent, 0);
3833
3834         mega_runpendq(adapter);
3835
3836         spin_unlock_irqrestore(&adapter->lock, flags);
3837
3838         return rval;
3839 }
3840
3841
3842 static int
3843 mega_do_del_logdrv(adapter_t *adapter, int logdrv)
3844 {
3845         megacmd_t       mc;
3846         int     rval;
3847
3848         memset( &mc, 0, sizeof(megacmd_t));
3849
3850         mc.cmd = FC_DEL_LOGDRV;
3851         mc.opcode = OP_DEL_LOGDRV;
3852         mc.subopcode = logdrv;
3853
3854         rval = mega_internal_command(adapter, &mc, NULL);
3855
3856         /* log this event */
3857         if(rval) {
3858                 dev_warn(&adapter->dev->dev, "Delete LD-%d failed", logdrv);
3859                 return rval;
3860         }
3861
3862         /*
3863          * After deleting first logical drive, the logical drives must be
3864          * addressed by adding 0x80 to the logical drive id.
3865          */
3866         adapter->read_ldidmap = 1;
3867
3868         return rval;
3869 }
3870
3871
3872 /**
3873  * mega_get_max_sgl()
3874  * @adapter - pointer to our soft state
3875  *
3876  * Find out the maximum number of scatter-gather elements supported by this
3877  * version of the firmware
3878  */
3879 static void
3880 mega_get_max_sgl(adapter_t *adapter)
3881 {
3882         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3883         mbox_t  *mbox;
3884
3885         mbox = (mbox_t *)raw_mbox;
3886
3887         memset(mbox, 0, sizeof(raw_mbox));
3888
3889         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3890
3891         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3892
3893         raw_mbox[0] = MAIN_MISC_OPCODE;
3894         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3895
3896
3897         if( issue_scb_block(adapter, raw_mbox) ) {
3898                 /*
3899                  * f/w does not support this command. Choose the default value
3900                  */
3901                 adapter->sglen = MIN_SGLIST;
3902         }
3903         else {
3904                 adapter->sglen = *((char *)adapter->mega_buffer);
3905
3906                 /*
3907                  * Make sure this is not more than the resources we are
3908                  * planning to allocate
3909                  */
3910                 if ( adapter->sglen > MAX_SGLIST )
3911                         adapter->sglen = MAX_SGLIST;
3912         }
3913
3914         return;
3915 }
3916
3917
3918 /**
3919  * mega_support_cluster()
3920  * @adapter - pointer to our soft state
3921  *
3922  * Find out if this firmware support cluster calls.
3923  */
3924 static int
3925 mega_support_cluster(adapter_t *adapter)
3926 {
3927         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3928         mbox_t  *mbox;
3929
3930         mbox = (mbox_t *)raw_mbox;
3931
3932         memset(mbox, 0, sizeof(raw_mbox));
3933
3934         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3935
3936         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3937
3938         /*
3939          * Try to get the initiator id. This command will succeed iff the
3940          * clustering is available on this HBA.
3941          */
3942         raw_mbox[0] = MEGA_GET_TARGET_ID;
3943
3944         if( issue_scb_block(adapter, raw_mbox) == 0 ) {
3945
3946                 /*
3947                  * Cluster support available. Get the initiator target id.
3948                  * Tell our id to mid-layer too.
3949                  */
3950                 adapter->this_id = *(u32 *)adapter->mega_buffer;
3951                 adapter->host->this_id = adapter->this_id;
3952
3953                 return 1;
3954         }
3955
3956         return 0;
3957 }
3958
3959 #ifdef CONFIG_PROC_FS
3960 /**
3961  * mega_adapinq()
3962  * @adapter - pointer to our soft state
3963  * @dma_handle - DMA address of the buffer
3964  *
3965  * Issue internal commands while interrupts are available.
3966  * We only issue direct mailbox commands from within the driver. ioctl()
3967  * interface using these routines can issue passthru commands.
3968  */
3969 static int
3970 mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle)
3971 {
3972         megacmd_t       mc;
3973
3974         memset(&mc, 0, sizeof(megacmd_t));
3975
3976         if( adapter->flag & BOARD_40LD ) {
3977                 mc.cmd = FC_NEW_CONFIG;
3978                 mc.opcode = NC_SUBOP_ENQUIRY3;
3979                 mc.subopcode = ENQ3_GET_SOLICITED_FULL;
3980         }
3981         else {
3982                 mc.cmd = MEGA_MBOXCMD_ADPEXTINQ;
3983         }
3984
3985         mc.xferaddr = (u32)dma_handle;
3986
3987         if ( mega_internal_command(adapter, &mc, NULL) != 0 ) {
3988                 return -1;
3989         }
3990
3991         return 0;
3992 }
3993
3994
3995 /** mega_internal_dev_inquiry()
3996  * @adapter - pointer to our soft state
3997  * @ch - channel for this device
3998  * @tgt - ID of this device
3999  * @buf_dma_handle - DMA address of the buffer
4000  *
4001  * Issue the scsi inquiry for the specified device.
4002  */
4003 static int
4004 mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt,
4005                 dma_addr_t buf_dma_handle)
4006 {
4007         mega_passthru   *pthru;
4008         dma_addr_t      pthru_dma_handle;
4009         megacmd_t       mc;
4010         int             rval;
4011         struct pci_dev  *pdev;
4012
4013
4014         /*
4015          * For all internal commands, the buffer must be allocated in <4GB
4016          * address range
4017          */
4018         if( make_local_pdev(adapter, &pdev) != 0 ) return -1;
4019
4020         pthru = pci_alloc_consistent(pdev, sizeof(mega_passthru),
4021                         &pthru_dma_handle);
4022
4023         if( pthru == NULL ) {
4024                 free_local_pdev(pdev);
4025                 return -1;
4026         }
4027
4028         pthru->timeout = 2;
4029         pthru->ars = 1;
4030         pthru->reqsenselen = 14;
4031         pthru->islogical = 0;
4032
4033         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch;
4034
4035         pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt;
4036
4037         pthru->cdblen = 6;
4038
4039         pthru->cdb[0] = INQUIRY;
4040         pthru->cdb[1] = 0;
4041         pthru->cdb[2] = 0;
4042         pthru->cdb[3] = 0;
4043         pthru->cdb[4] = 255;
4044         pthru->cdb[5] = 0;
4045
4046
4047         pthru->dataxferaddr = (u32)buf_dma_handle;
4048         pthru->dataxferlen = 256;
4049
4050         memset(&mc, 0, sizeof(megacmd_t));
4051
4052         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
4053         mc.xferaddr = (u32)pthru_dma_handle;
4054
4055         rval = mega_internal_command(adapter, &mc, pthru);
4056
4057         pci_free_consistent(pdev, sizeof(mega_passthru), pthru,
4058                         pthru_dma_handle);
4059
4060         free_local_pdev(pdev);
4061
4062         return rval;
4063 }
4064 #endif
4065
4066 /**
4067  * mega_internal_command()
4068  * @adapter - pointer to our soft state
4069  * @mc - the mailbox command
4070  * @pthru - Passthru structure for DCDB commands
4071  *
4072  * Issue the internal commands in interrupt mode.
4073  * The last argument is the address of the passthru structure if the command
4074  * to be fired is a passthru command
4075  *
4076  * Note: parameter 'pthru' is null for non-passthru commands.
4077  */
4078 static int
4079 mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
4080 {
4081         unsigned long flags;
4082         scb_t   *scb;
4083         int     rval;
4084
4085         /*
4086          * The internal commands share one command id and hence are
4087          * serialized. This is so because we want to reserve maximum number of
4088          * available command ids for the I/O commands.
4089          */
4090         mutex_lock(&adapter->int_mtx);
4091
4092         scb = &adapter->int_scb;
4093         memset(scb, 0, sizeof(scb_t));
4094
4095         scb->idx = CMDID_INT_CMDS;
4096         scb->state |= SCB_ACTIVE | SCB_PENDQ;
4097
4098         memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
4099
4100         /*
4101          * Is it a passthru command
4102          */
4103         if (mc->cmd == MEGA_MBOXCMD_PASSTHRU)
4104                 scb->pthru = pthru;
4105
4106         spin_lock_irqsave(&adapter->lock, flags);
4107         list_add_tail(&scb->list, &adapter->pending_list);
4108         /*
4109          * Check if the HBA is in quiescent state, e.g., during a
4110          * delete logical drive opertion. If it is, don't run
4111          * the pending_list.
4112          */
4113         if (atomic_read(&adapter->quiescent) == 0)
4114                 mega_runpendq(adapter);
4115         spin_unlock_irqrestore(&adapter->lock, flags);
4116
4117         wait_for_completion(&adapter->int_waitq);
4118
4119         mc->status = rval = adapter->int_status;
4120
4121         /*
4122          * Print a debug message for all failed commands. Applications can use
4123          * this information.
4124          */
4125         if (rval && trace_level) {
4126                 dev_info(&adapter->dev->dev, "cmd [%x, %x, %x] status:[%x]\n",
4127                         mc->cmd, mc->opcode, mc->subopcode, rval);
4128         }
4129
4130         mutex_unlock(&adapter->int_mtx);
4131         return rval;
4132 }
4133
4134 static struct scsi_host_template megaraid_template = {
4135         .module                         = THIS_MODULE,
4136         .name                           = "MegaRAID",
4137         .proc_name                      = "megaraid_legacy",
4138         .info                           = megaraid_info,
4139         .queuecommand                   = megaraid_queue,
4140         .bios_param                     = megaraid_biosparam,
4141         .max_sectors                    = MAX_SECTORS_PER_IO,
4142         .can_queue                      = MAX_COMMANDS,
4143         .this_id                        = DEFAULT_INITIATOR_ID,
4144         .sg_tablesize                   = MAX_SGLIST,
4145         .cmd_per_lun                    = DEF_CMD_PER_LUN,
4146         .eh_abort_handler               = megaraid_abort,
4147         .eh_device_reset_handler        = megaraid_reset,
4148         .eh_bus_reset_handler           = megaraid_reset,
4149         .eh_host_reset_handler          = megaraid_reset,
4150         .no_write_same                  = 1,
4151 };
4152
4153 static int
4154 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
4155 {
4156         struct Scsi_Host *host;
4157         adapter_t *adapter;
4158         unsigned long mega_baseport, tbase, flag = 0;
4159         u16 subsysid, subsysvid;
4160         u8 pci_bus, pci_dev_func;
4161         int irq, i, j;
4162         int error = -ENODEV;
4163
4164         if (hba_count >= MAX_CONTROLLERS)
4165                 goto out;
4166
4167         if (pci_enable_device(pdev))
4168                 goto out;
4169         pci_set_master(pdev);
4170
4171         pci_bus = pdev->bus->number;
4172         pci_dev_func = pdev->devfn;
4173
4174         /*
4175          * The megaraid3 stuff reports the ID of the Intel part which is not
4176          * remotely specific to the megaraid
4177          */
4178         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
4179                 u16 magic;
4180                 /*
4181                  * Don't fall over the Compaq management cards using the same
4182                  * PCI identifier
4183                  */
4184                 if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
4185                     pdev->subsystem_device == 0xC000)
4186                         return -ENODEV;
4187                 /* Now check the magic signature byte */
4188                 pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
4189                 if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
4190                         return -ENODEV;
4191                 /* Ok it is probably a megaraid */
4192         }
4193
4194         /*
4195          * For these vendor and device ids, signature offsets are not
4196          * valid and 64 bit is implicit
4197          */
4198         if (id->driver_data & BOARD_64BIT)
4199                 flag |= BOARD_64BIT;
4200         else {
4201                 u32 magic64;
4202
4203                 pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
4204                 if (magic64 == HBA_SIGNATURE_64BIT)
4205                         flag |= BOARD_64BIT;
4206         }
4207
4208         subsysvid = pdev->subsystem_vendor;
4209         subsysid = pdev->subsystem_device;
4210
4211         dev_notice(&pdev->dev, "found 0x%4.04x:0x%4.04x\n",
4212                 id->vendor, id->device);
4213
4214         /* Read the base port and IRQ from PCI */
4215         mega_baseport = pci_resource_start(pdev, 0);
4216         irq = pdev->irq;
4217
4218         tbase = mega_baseport;
4219         if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
4220                 flag |= BOARD_MEMMAP;
4221
4222                 if (!request_mem_region(mega_baseport, 128, "megaraid")) {
4223                         dev_warn(&pdev->dev, "mem region busy!\n");
4224                         goto out_disable_device;
4225                 }
4226
4227                 mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
4228                 if (!mega_baseport) {
4229                         dev_warn(&pdev->dev, "could not map hba memory\n");
4230                         goto out_release_region;
4231                 }
4232         } else {
4233                 flag |= BOARD_IOMAP;
4234                 mega_baseport += 0x10;
4235
4236                 if (!request_region(mega_baseport, 16, "megaraid"))
4237                         goto out_disable_device;
4238         }
4239
4240         /* Initialize SCSI Host structure */
4241         host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
4242         if (!host)
4243                 goto out_iounmap;
4244
4245         adapter = (adapter_t *)host->hostdata;
4246         memset(adapter, 0, sizeof(adapter_t));
4247
4248         dev_notice(&pdev->dev,
4249                 "scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
4250                 host->host_no, mega_baseport, irq);
4251
4252         adapter->base = mega_baseport;
4253         if (flag & BOARD_MEMMAP)
4254                 adapter->mmio_base = (void __iomem *) mega_baseport;
4255
4256         INIT_LIST_HEAD(&adapter->free_list);
4257         INIT_LIST_HEAD(&adapter->pending_list);
4258         INIT_LIST_HEAD(&adapter->completed_list);
4259
4260         adapter->flag = flag;
4261         spin_lock_init(&adapter->lock);
4262
4263         host->cmd_per_lun = max_cmd_per_lun;
4264         host->max_sectors = max_sectors_per_io;
4265
4266         adapter->dev = pdev;
4267         adapter->host = host;
4268
4269         adapter->host->irq = irq;
4270
4271         if (flag & BOARD_MEMMAP)
4272                 adapter->host->base = tbase;
4273         else {
4274                 adapter->host->io_port = tbase;
4275                 adapter->host->n_io_port = 16;
4276         }
4277
4278         adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;
4279
4280         /*
4281          * Allocate buffer to issue internal commands.
4282          */
4283         adapter->mega_buffer = pci_alloc_consistent(adapter->dev,
4284                 MEGA_BUFFER_SIZE, &adapter->buf_dma_handle);
4285         if (!adapter->mega_buffer) {
4286                 dev_warn(&pdev->dev, "out of RAM\n");
4287                 goto out_host_put;
4288         }
4289
4290         adapter->scb_list = kmalloc_array(MAX_COMMANDS, sizeof(scb_t),
4291                                           GFP_KERNEL);
4292         if (!adapter->scb_list) {
4293                 dev_warn(&pdev->dev, "out of RAM\n");
4294                 goto out_free_cmd_buffer;
4295         }
4296
4297         if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
4298                                 megaraid_isr_memmapped : megaraid_isr_iomapped,
4299                                         IRQF_SHARED, "megaraid", adapter)) {
4300                 dev_warn(&pdev->dev, "Couldn't register IRQ %d!\n", irq);
4301                 goto out_free_scb_list;
4302         }
4303
4304         if (mega_setup_mailbox(adapter))
4305                 goto out_free_irq;
4306
4307         if (mega_query_adapter(adapter))
4308                 goto out_free_mbox;
4309
4310         /*
4311          * Have checks for some buggy f/w
4312          */
4313         if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
4314                 /*
4315                  * Which firmware
4316                  */
4317                 if (!strcmp(adapter->fw_version, "3.00") ||
4318                                 !strcmp(adapter->fw_version, "3.01")) {
4319
4320                         dev_warn(&pdev->dev,
4321                                 "Your card is a Dell PERC "
4322                                 "2/SC RAID controller with "
4323                                 "firmware\nmegaraid: 3.00 or 3.01.  "
4324                                 "This driver is known to have "
4325                                 "corruption issues\nmegaraid: with "
4326                                 "those firmware versions on this "
4327                                 "specific card.  In order\nmegaraid: "
4328                                 "to protect your data, please upgrade "
4329                                 "your firmware to version\nmegaraid: "
4330                                 "3.10 or later, available from the "
4331                                 "Dell Technical Support web\n"
4332                                 "megaraid: site at\nhttp://support."
4333                                 "dell.com/us/en/filelib/download/"
4334                                 "index.asp?fileid=2940\n"
4335                         );
4336                 }
4337         }
4338
4339         /*
4340          * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
4341          * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
4342          * support, since this firmware cannot handle 64 bit
4343          * addressing
4344          */
4345         if ((subsysvid == PCI_VENDOR_ID_HP) &&
4346             ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
4347                 /*
4348                  * which firmware
4349                  */
4350                 if (!strcmp(adapter->fw_version, "H01.07") ||
4351                     !strcmp(adapter->fw_version, "H01.08") ||
4352                     !strcmp(adapter->fw_version, "H01.09") ) {
4353                         dev_warn(&pdev->dev,
4354                                 "Firmware H.01.07, "
4355                                 "H.01.08, and H.01.09 on 1M/2M "
4356                                 "controllers\n"
4357                                 "do not support 64 bit "
4358                                 "addressing.\nDISABLING "
4359                                 "64 bit support.\n");
4360                         adapter->flag &= ~BOARD_64BIT;
4361                 }
4362         }
4363
4364         if (mega_is_bios_enabled(adapter))
4365                 mega_hbas[hba_count].is_bios_enabled = 1;
4366         mega_hbas[hba_count].hostdata_addr = adapter;
4367
4368         /*
4369          * Find out which channel is raid and which is scsi. This is
4370          * for ROMB support.
4371          */
4372         mega_enum_raid_scsi(adapter);
4373
4374         /*
4375          * Find out if a logical drive is set as the boot drive. If
4376          * there is one, will make that as the first logical drive.
4377          * ROMB: Do we have to boot from a physical drive. Then all
4378          * the physical drives would appear before the logical disks.
4379          * Else, all the physical drives would be exported to the mid
4380          * layer after logical drives.
4381          */
4382         mega_get_boot_drv(adapter);
4383
4384         if (adapter->boot_pdrv_enabled) {
4385                 j = adapter->product_info.nchannels;
4386                 for( i = 0; i < j; i++ )
4387                         adapter->logdrv_chan[i] = 0;
4388                 for( i = j; i < NVIRT_CHAN + j; i++ )
4389                         adapter->logdrv_chan[i] = 1;
4390         } else {
4391                 for (i = 0; i < NVIRT_CHAN; i++)
4392                         adapter->logdrv_chan[i] = 1;
4393                 for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
4394                         adapter->logdrv_chan[i] = 0;
4395                 adapter->mega_ch_class <<= NVIRT_CHAN;
4396         }
4397
4398         /*
4399          * Do we support random deletion and addition of logical
4400          * drives
4401          */
4402         adapter->read_ldidmap = 0;      /* set it after first logdrv
4403                                                    delete cmd */
4404         adapter->support_random_del = mega_support_random_del(adapter);
4405
4406         /* Initialize SCBs */
4407         if (mega_init_scb(adapter))
4408                 goto out_free_mbox;
4409
4410         /*
4411          * Reset the pending commands counter
4412          */
4413         atomic_set(&adapter->pend_cmds, 0);
4414
4415         /*
4416          * Reset the adapter quiescent flag
4417          */
4418         atomic_set(&adapter->quiescent, 0);
4419
4420         hba_soft_state[hba_count] = adapter;
4421
4422         /*
4423          * Fill in the structure which needs to be passed back to the
4424          * application when it does an ioctl() for controller related
4425          * information.
4426          */
4427         i = hba_count;
4428
4429         mcontroller[i].base = mega_baseport;
4430         mcontroller[i].irq = irq;
4431         mcontroller[i].numldrv = adapter->numldrv;
4432         mcontroller[i].pcibus = pci_bus;
4433         mcontroller[i].pcidev = id->device;
4434         mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
4435         mcontroller[i].pciid = -1;
4436         mcontroller[i].pcivendor = id->vendor;
4437         mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
4438         mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;
4439
4440
4441         /* Set the Mode of addressing to 64 bit if we can */
4442         if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
4443                 pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4444                 adapter->has_64bit_addr = 1;
4445         } else  {
4446                 pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4447                 adapter->has_64bit_addr = 0;
4448         }
4449
4450         mutex_init(&adapter->int_mtx);
4451         init_completion(&adapter->int_waitq);
4452
4453         adapter->this_id = DEFAULT_INITIATOR_ID;
4454         adapter->host->this_id = DEFAULT_INITIATOR_ID;
4455
4456 #if MEGA_HAVE_CLUSTERING
4457         /*
4458          * Is cluster support enabled on this controller
4459          * Note: In a cluster the HBAs ( the initiators ) will have
4460          * different target IDs and we cannot assume it to be 7. Call
4461          * to mega_support_cluster() will get the target ids also if
4462          * the cluster support is available
4463          */
4464         adapter->has_cluster = mega_support_cluster(adapter);
4465         if (adapter->has_cluster) {
4466                 dev_notice(&pdev->dev,
4467                         "Cluster driver, initiator id:%d\n",
4468                         adapter->this_id);
4469         }
4470 #endif
4471
4472         pci_set_drvdata(pdev, host);
4473
4474         mega_create_proc_entry(hba_count, mega_proc_dir_entry);
4475
4476         error = scsi_add_host(host, &pdev->dev);
4477         if (error)
4478                 goto out_free_mbox;
4479
4480         scsi_scan_host(host);
4481         hba_count++;
4482         return 0;
4483
4484  out_free_mbox:
4485         pci_free_consistent(adapter->dev, sizeof(mbox64_t),
4486                         adapter->una_mbox64, adapter->una_mbox64_dma);
4487  out_free_irq:
4488         free_irq(adapter->host->irq, adapter);
4489  out_free_scb_list:
4490         kfree(adapter->scb_list);
4491  out_free_cmd_buffer:
4492         pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
4493                         adapter->mega_buffer, adapter->buf_dma_handle);
4494  out_host_put:
4495         scsi_host_put(host);
4496  out_iounmap:
4497         if (flag & BOARD_MEMMAP)
4498                 iounmap((void *)mega_baseport);
4499  out_release_region:
4500         if (flag & BOARD_MEMMAP)
4501                 release_mem_region(tbase, 128);
4502         else
4503                 release_region(mega_baseport, 16);
4504  out_disable_device:
4505         pci_disable_device(pdev);
4506  out:
4507         return error;
4508 }
4509
4510 static void
4511 __megaraid_shutdown(adapter_t *adapter)
4512 {
4513         u_char  raw_mbox[sizeof(struct mbox_out)];
4514         mbox_t  *mbox = (mbox_t *)raw_mbox;
4515         int     i;
4516
4517         /* Flush adapter cache */
4518         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4519         raw_mbox[0] = FLUSH_ADAPTER;
4520
4521         free_irq(adapter->host->irq, adapter);
4522
4523         /* Issue a blocking (interrupts disabled) command to the card */
4524         issue_scb_block(adapter, raw_mbox);
4525
4526         /* Flush disks cache */
4527         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4528         raw_mbox[0] = FLUSH_SYSTEM;
4529
4530         /* Issue a blocking (interrupts disabled) command to the card */
4531         issue_scb_block(adapter, raw_mbox);
4532
4533         if (atomic_read(&adapter->pend_cmds) > 0)
4534                 dev_warn(&adapter->dev->dev, "pending commands!!\n");
4535
4536         /*
4537          * Have a delibrate delay to make sure all the caches are
4538          * actually flushed.
4539          */
4540         for (i = 0; i <= 10; i++)
4541                 mdelay(1000);
4542 }
4543
4544 static void
4545 megaraid_remove_one(struct pci_dev *pdev)
4546 {
4547         struct Scsi_Host *host = pci_get_drvdata(pdev);
4548         adapter_t *adapter = (adapter_t *)host->hostdata;
4549         char buf[12] = { 0 };
4550
4551         scsi_remove_host(host);
4552
4553         __megaraid_shutdown(adapter);
4554
4555         /* Free our resources */
4556         if (adapter->flag & BOARD_MEMMAP) {
4557                 iounmap((void *)adapter->base);
4558                 release_mem_region(adapter->host->base, 128);
4559         } else
4560                 release_region(adapter->base, 16);
4561
4562         mega_free_sgl(adapter);
4563
4564         sprintf(buf, "hba%d", adapter->host->host_no);
4565         remove_proc_subtree(buf, mega_proc_dir_entry);
4566
4567         pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
4568                         adapter->mega_buffer, adapter->buf_dma_handle);
4569         kfree(adapter->scb_list);
4570         pci_free_consistent(adapter->dev, sizeof(mbox64_t),
4571                         adapter->una_mbox64, adapter->una_mbox64_dma);
4572
4573         scsi_host_put(host);
4574         pci_disable_device(pdev);
4575
4576         hba_count--;
4577 }
4578
4579 static void
4580 megaraid_shutdown(struct pci_dev *pdev)
4581 {
4582         struct Scsi_Host *host = pci_get_drvdata(pdev);
4583         adapter_t *adapter = (adapter_t *)host->hostdata;
4584
4585         __megaraid_shutdown(adapter);
4586 }
4587
4588 static struct pci_device_id megaraid_pci_tbl[] = {
4589         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID,
4590                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4591         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2,
4592                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4593         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3,
4594                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4595         {0,}
4596 };
4597 MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl);
4598
4599 static struct pci_driver megaraid_pci_driver = {
4600         .name           = "megaraid_legacy",
4601         .id_table       = megaraid_pci_tbl,
4602         .probe          = megaraid_probe_one,
4603         .remove         = megaraid_remove_one,
4604         .shutdown       = megaraid_shutdown,
4605 };
4606
4607 static int __init megaraid_init(void)
4608 {
4609         int error;
4610
4611         if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN))
4612                 max_cmd_per_lun = MAX_CMD_PER_LUN;
4613         if (max_mbox_busy_wait > MBOX_BUSY_WAIT)
4614                 max_mbox_busy_wait = MBOX_BUSY_WAIT;
4615
4616 #ifdef CONFIG_PROC_FS
4617         mega_proc_dir_entry = proc_mkdir("megaraid", NULL);
4618         if (!mega_proc_dir_entry) {
4619                 printk(KERN_WARNING
4620                                 "megaraid: failed to create megaraid root\n");
4621         }
4622 #endif
4623         error = pci_register_driver(&megaraid_pci_driver);
4624         if (error) {
4625 #ifdef CONFIG_PROC_FS
4626                 remove_proc_entry("megaraid", NULL);
4627 #endif
4628                 return error;
4629         }
4630
4631         /*
4632          * Register the driver as a character device, for applications
4633          * to access it for ioctls.
4634          * First argument (major) to register_chrdev implies a dynamic
4635          * major number allocation.
4636          */
4637         major = register_chrdev(0, "megadev_legacy", &megadev_fops);
4638         if (!major) {
4639                 printk(KERN_WARNING
4640                                 "megaraid: failed to register char device\n");
4641         }
4642
4643         return 0;
4644 }
4645
4646 static void __exit megaraid_exit(void)
4647 {
4648         /*
4649          * Unregister the character device interface to the driver.
4650          */
4651         unregister_chrdev(major, "megadev_legacy");
4652
4653         pci_unregister_driver(&megaraid_pci_driver);
4654
4655 #ifdef CONFIG_PROC_FS
4656         remove_proc_entry("megaraid", NULL);
4657 #endif
4658 }
4659
4660 module_init(megaraid_init);
4661 module_exit(megaraid_exit);
4662
4663 /* vi: set ts=8 sw=8 tw=78: */