drivers/scsi/megaraid.c

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