kernel/drivers/scsi/megaraid.c

   1 /*
   2  *
   3  *                      Linux MegaRAID device driver
   4  *
   5  * Copyright (c) 2002  LSI Logic Corporation.
   6  *
   7  *         This program is free software; you can redistribute it and/or
   8  *         modify it under the terms of the GNU General Public License
   9  *         as published by the Free Software Foundation; either version
  10  *         2 of the License, or (at your option) any later version.
  11  *
  12  * Copyright (c) 2002  Red Hat, Inc. All rights reserved.
  13  *        - fixes
  14  *        - speed-ups (list handling fixes, issued_list, optimizations.)
  15  *        - lots of cleanups.
  16  *
  17  * Copyright (c) 2003  Christoph Hellwig  <hch@lst.de>
  18  *        - new-style, hotplug-aware pci probing and scsi registration
  19  *
  20  * Version : v2.00.4 Mon Nov 14 14:02:43 EST 2005 - Seokmann Ju
  21  *                                              <Seokmann.Ju@lsil.com>
  22  *
  23  * Description: Linux device driver for LSI Logic MegaRAID controller
  24  *
  25  * Supported controllers: MegaRAID 418, 428, 438, 466, 762, 467, 471, 490, 493
  26  *                                      518, 520, 531, 532
  27  *
  28  * This driver is supported by LSI Logic, with assistance from Red Hat, Dell,
  29  * and others. Please send updates to the mailing list
  30  * linux-scsi@vger.kernel.org .
  31  *
  32  */
  33
  34 #include <linux/mm.h>
  35 #include <linux/fs.h>
  36 #include <linux/blkdev.h>
  37 #include <asm/uaccess.h>
  38 #include <asm/io.h>
  39 #include <linux/completion.h>
  40 #include <linux/delay.h>
  41 #include <linux/proc_fs.h>
  42 #include <linux/seq_file.h>
  43 #include <linux/reboot.h>
  44 #include <linux/module.h>
  45 #include <linux/list.h>
  46 #include <linux/interrupt.h>
  47 #include <linux/pci.h>
  48 #include <linux/init.h>
  49 #include <linux/dma-mapping.h>
  50 #include <linux/mutex.h>
  51 #include <linux/slab.h>
  52 #include <scsi/scsicam.h>
  53
  54 #include "scsi.h"
  55 #include <scsi/scsi_host.h>
  56
  57 #include "megaraid.h"
  58
  59 #define MEGARAID_MODULE_VERSION "2.00.4"
  60
  61 MODULE_AUTHOR ("sju@lsil.com");
  62 MODULE_DESCRIPTION ("LSI Logic MegaRAID legacy driver");
  63 MODULE_LICENSE ("GPL");
  64 MODULE_VERSION(MEGARAID_MODULE_VERSION);
  65
  66 static DEFINE_MUTEX(megadev_mutex);
  67 static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
  68 module_param(max_cmd_per_lun, uint, 0);
  69 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)");
  70
  71 static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO;
  72 module_param(max_sectors_per_io, ushort, 0);
  73 MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)");
  74
  75
  76 static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT;
  77 module_param(max_mbox_busy_wait, ushort, 0);
  78 MODULE_PARM_DESC(max_mbox_busy_wait, "Maximum wait for mailbox in microseconds if busy (default=MBOX_BUSY_WAIT=10)");
  79
  80 #define RDINDOOR(adapter)       readl((adapter)->mmio_base + 0x20)
  81 #define RDOUTDOOR(adapter)      readl((adapter)->mmio_base + 0x2C)
  82 #define WRINDOOR(adapter,value)  writel(value, (adapter)->mmio_base + 0x20)
  83 #define WROUTDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x2C)
  84
  85 /*
  86  * Global variables
  87  */
  88
  89 static int hba_count;
  90 static adapter_t *hba_soft_state[MAX_CONTROLLERS];
  91 static struct proc_dir_entry *mega_proc_dir_entry;
  92
  93 /* For controller re-ordering */
  94 static struct mega_hbas mega_hbas[MAX_CONTROLLERS];
  95
  96 static long
  97 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
  98
  99 /*
 100  * The File Operations structure for the serial/ioctl interface of the driver
 101  */
 102 static const struct file_operations megadev_fops = {
 103         .owner          = THIS_MODULE,
 104         .unlocked_ioctl = megadev_unlocked_ioctl,
 105         .open           = megadev_open,
 106         .llseek         = noop_llseek,
 107 };
 108
 109 /*
 110  * Array to structures for storing the information about the controllers. This
 111  * information is sent to the user level applications, when they do an ioctl
 112  * for this information.
 113  */
 114 static struct mcontroller mcontroller[MAX_CONTROLLERS];
 115
 116 /* The current driver version */
 117 static u32 driver_ver = 0x02000000;
 118
 119 /* major number used by the device for character interface */
 120 static int major;
 121
 122 #define IS_RAID_CH(hba, ch)     (((hba)->mega_ch_class >> (ch)) & 0x01)
 123
 124
 125 /*
 126  * Debug variable to print some diagnostic messages
 127  */
 128 static int trace_level;
 129
 130 /**
 131  * mega_setup_mailbox()
 132  * @adapter - pointer to our soft state
 133  *
 134  * Allocates a 8 byte aligned memory for the handshake mailbox.
 135  */
 136 static int
 137 mega_setup_mailbox(adapter_t *adapter)
 138 {
 139         unsigned long   align;
 140
 141         adapter->una_mbox64 = pci_alloc_consistent(adapter->dev,
 142                         sizeof(mbox64_t), &adapter->una_mbox64_dma);
 143
 144         if( !adapter->una_mbox64 ) return -1;
 145
 146         adapter->mbox = &adapter->una_mbox64->mbox;
 147
 148         adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) &
 149                         (~0UL ^ 0xFUL));
 150
 151         adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8);
 152
 153         align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox);
 154
 155         adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align;
 156
 157         /*
 158          * Register the mailbox if the controller is an io-mapped controller
 159          */
 160         if( adapter->flag & BOARD_IOMAP ) {
 161
 162                 outb(adapter->mbox_dma & 0xFF,
 163                                 adapter->host->io_port + MBOX_PORT0);
 164
 165                 outb((adapter->mbox_dma >> 8) & 0xFF,
 166                                 adapter->host->io_port + MBOX_PORT1);
 167
 168                 outb((adapter->mbox_dma >> 16) & 0xFF,
 169                                 adapter->host->io_port + MBOX_PORT2);
 170
 171                 outb((adapter->mbox_dma >> 24) & 0xFF,
 172                                 adapter->host->io_port + MBOX_PORT3);
 173
 174                 outb(ENABLE_MBOX_BYTE,
 175                                 adapter->host->io_port + ENABLE_MBOX_REGION);
 176
 177                 irq_ack(adapter);
 178
 179                 irq_enable(adapter);
 180         }
 181
 182         return 0;
 183 }
 184
 185
 186 /*
 187  * mega_query_adapter()
 188  * @adapter - pointer to our soft state
 189  *
 190  * Issue the adapter inquiry commands to the controller and find out
 191  * information and parameter about the devices attached
 192  */
 193 static int
 194 mega_query_adapter(adapter_t *adapter)
 195 {
 196         dma_addr_t      prod_info_dma_handle;
 197         mega_inquiry3   *inquiry3;
 198         u8      raw_mbox[sizeof(struct mbox_out)];
 199         mbox_t  *mbox;
 200         int     retval;
 201
 202         /* Initialize adapter inquiry mailbox */
 203
 204         mbox = (mbox_t *)raw_mbox;
 205
 206         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
 207         memset(&mbox->m_out, 0, sizeof(raw_mbox));
 208
 209         /*
 210          * Try to issue Inquiry3 command
 211          * if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
 212          * update enquiry3 structure
 213          */
 214         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
 215
 216         inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;
 217
 218         raw_mbox[0] = FC_NEW_CONFIG;            /* i.e. mbox->cmd=0xA1 */
 219         raw_mbox[2] = NC_SUBOP_ENQUIRY3;        /* i.e. 0x0F */
 220         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;  /* i.e. 0x02 */
 221
 222         /* Issue a blocking command to the card */
 223         if ((retval = issue_scb_block(adapter, raw_mbox))) {
 224                 /* the adapter does not support 40ld */
 225
 226                 mraid_ext_inquiry       *ext_inq;
 227                 mraid_inquiry           *inq;
 228                 dma_addr_t              dma_handle;
 229
 230                 ext_inq = pci_alloc_consistent(adapter->dev,
 231                                 sizeof(mraid_ext_inquiry), &dma_handle);
 232
 233                 if( ext_inq == NULL ) return -1;
 234
 235                 inq = &ext_inq->raid_inq;
 236
 237                 mbox->m_out.xferaddr = (u32)dma_handle;
 238
 239                 /*issue old 0x04 command to adapter */
 240                 mbox->m_out.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                 pci_free_consistent(adapter->dev, sizeof(mraid_ext_inquiry),
 252                                 ext_inq, dma_handle);
 253
 254         } else {                /*adapter supports 40ld */
 255                 adapter->flag |= BOARD_40LD;
 256
 257                 /*
 258                  * get product_info, which is static information and will be
 259                  * unchanged
 260                  */
 261                 prod_info_dma_handle = pci_map_single(adapter->dev, (void *)
 262                                 &adapter->product_info,
 263                                 sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
 264
 265                 mbox->m_out.xferaddr = prod_info_dma_handle;
 266
 267                 raw_mbox[0] = FC_NEW_CONFIG;    /* i.e. mbox->cmd=0xA1 */
 268                 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;    /* i.e. 0x0E */
 269
 270                 if ((retval = issue_scb_block(adapter, raw_mbox)))
 271                         printk(KERN_WARNING
 272                         "megaraid: Product_info cmd failed with error: %d\n",
 273                                 retval);
 274
 275                 pci_unmap_single(adapter->dev, prod_info_dma_handle,
 276                                 sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
 277         }
 278
 279
 280         /*
 281          * kernel scans the channels from 0 to <= max_channel
 282          */
 283         adapter->host->max_channel =
 284                 adapter->product_info.nchannels + NVIRT_CHAN -1;
 285
 286         adapter->host->max_id = 16;     /* max targets per channel */
 287
 288         adapter->host->max_lun = 7;     /* Up to 7 luns for non disk devices */
 289
 290         adapter->host->cmd_per_lun = max_cmd_per_lun;
 291
 292         adapter->numldrv = inquiry3->num_ldrv;
 293
 294         adapter->max_cmds = adapter->product_info.max_commands;
 295
 296         if(adapter->max_cmds > MAX_COMMANDS)
 297                 adapter->max_cmds = MAX_COMMANDS;
 298
 299         adapter->host->can_queue = adapter->max_cmds - 1;
 300
 301         /*
 302          * Get the maximum number of scatter-gather elements supported by this
 303          * firmware
 304          */
 305         mega_get_max_sgl(adapter);
 306
 307         adapter->host->sg_tablesize = adapter->sglen;
 308
 309         /* use HP firmware and bios version encoding
 310            Note: fw_version[0|1] and bios_version[0|1] were originally shifted
 311            right 8 bits making them zero. This 0 value was hardcoded to fix
 312            sparse warnings. */
 313         if (adapter->product_info.subsysvid == PCI_VENDOR_ID_HP) {
 314                 sprintf (adapter->fw_version, "%c%d%d.%d%d",
 315                          adapter->product_info.fw_version[2],
 316                          0,
 317                          adapter->product_info.fw_version[1] & 0x0f,
 318                          0,
 319                          adapter->product_info.fw_version[0] & 0x0f);
 320                 sprintf (adapter->bios_version, "%c%d%d.%d%d",
 321                          adapter->product_info.bios_version[2],
 322                          0,
 323                          adapter->product_info.bios_version[1] & 0x0f,
 324                          0,
 325                          adapter->product_info.bios_version[0] & 0x0f);
 326         } else {
 327                 memcpy(adapter->fw_version,
 328                                 (char *)adapter->product_info.fw_version, 4);
 329                 adapter->fw_version[4] = 0;
 330
 331                 memcpy(adapter->bios_version,
 332                                 (char *)adapter->product_info.bios_version, 4);
 333
 334                 adapter->bios_version[4] = 0;
 335         }
 336
 337         printk(KERN_NOTICE "megaraid: [%s:%s] detected %d logical drives.\n",
 338                 adapter->fw_version, adapter->bios_version, adapter->numldrv);
 339
 340         /*
 341          * Do we support extended (>10 bytes) cdbs
 342          */
 343         adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
 344         if (adapter->support_ext_cdb)
 345                 printk(KERN_NOTICE "megaraid: supports extended CDBs.\n");
 346
 347
 348         return 0;
 349 }
 350
 351 /**
 352  * mega_runpendq()
 353  * @adapter - pointer to our soft state
 354  *
 355  * Runs through the list of pending requests.
 356  */
 357 static inline void
 358 mega_runpendq(adapter_t *adapter)
 359 {
 360         if(!list_empty(&adapter->pending_list))
 361                 __mega_runpendq(adapter);
 362 }
 363
 364 /*
 365  * megaraid_queue()
 366  * @scmd - Issue this scsi command
 367  * @done - the callback hook into the scsi mid-layer
 368  *
 369  * The command queuing entry point for the mid-layer.
 370  */
 371 static int
 372 megaraid_queue_lck(Scsi_Cmnd *scmd, void (*done)(Scsi_Cmnd *))
 373 {
 374         adapter_t       *adapter;
 375         scb_t   *scb;
 376         int     busy=0;
 377         unsigned long flags;
 378
 379         adapter = (adapter_t *)scmd->device->host->hostdata;
 380
 381         scmd->scsi_done = done;
 382
 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, 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, 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:    /* fall through */
 498                 case WRITE_6:   /* fall through */
 499                 case READ_10:   /* fall through */
 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, Scsi_Cmnd *cmd, int *busy)
 522 {
 523         mega_ext_passthru       *epthru;
 524         mega_passthru   *pthru;
 525         scb_t   *scb;
 526         mbox_t  *mbox;
 527         u32     seg;
 528         char    islogical;
 529         int     max_ldrv_num;
 530         int     channel = 0;
 531         int     target = 0;
 532         int     ldrv_num = 0;   /* logical drive number */
 533
 534         /*
 535          * We know what channels our logical drives are on - mega_find_card()
 536          */
 537         islogical = adapter->logdrv_chan[cmd->device->channel];
 538
 539         /*
 540          * The theory: If physical drive is chosen for boot, all the physical
 541          * devices are exported before the logical drives, otherwise physical
 542          * devices are pushed after logical drives, in which case - Kernel sees
 543          * the physical devices on virtual channel which is obviously converted
 544          * to actual channel on the HBA.
 545          */
 546         if( adapter->boot_pdrv_enabled ) {
 547                 if( islogical ) {
 548                         /* logical channel */
 549                         channel = cmd->device->channel -
 550                                 adapter->product_info.nchannels;
 551                 }
 552                 else {
 553                         /* this is physical channel */
 554                         channel = cmd->device->channel;
 555                         target = cmd->device->id;
 556
 557                         /*
 558                          * boot from a physical disk, that disk needs to be
 559                          * exposed first IF both the channels are SCSI, then
 560                          * booting from the second channel is not allowed.
 561                          */
 562                         if( target == 0 ) {
 563                                 target = adapter->boot_pdrv_tgt;
 564                         }
 565                         else if( target == adapter->boot_pdrv_tgt ) {
 566                                 target = 0;
 567                         }
 568                 }
 569         }
 570         else {
 571                 if( islogical ) {
 572                         /* this is the logical channel */
 573                         channel = cmd->device->channel;
 574                 }
 575                 else {
 576                         /* physical channel */
 577                         channel = cmd->device->channel - NVIRT_CHAN;
 578                         target = cmd->device->id;
 579                 }
 580         }
 581
 582
 583         if(islogical) {
 584
 585                 /* have just LUN 0 for each target on virtual channels */
 586                 if (cmd->device->lun) {
 587                         cmd->result = (DID_BAD_TARGET << 16);
 588                         cmd->scsi_done(cmd);
 589                         return NULL;
 590                 }
 591
 592                 ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);
 593
 594
 595                 max_ldrv_num = (adapter->flag & BOARD_40LD) ?
 596                         MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;
 597
 598                 /*
 599                  * max_ldrv_num increases by 0x80 if some logical drive was
 600                  * deleted.
 601                  */
 602                 if(adapter->read_ldidmap)
 603                         max_ldrv_num += 0x80;
 604
 605                 if(ldrv_num > max_ldrv_num ) {
 606                         cmd->result = (DID_BAD_TARGET << 16);
 607                         cmd->scsi_done(cmd);
 608                         return NULL;
 609                 }
 610
 611         }
 612         else {
 613                 if( cmd->device->lun > 7) {
 614                         /*
 615                          * Do not support lun >7 for physically accessed
 616                          * devices
 617                          */
 618                         cmd->result = (DID_BAD_TARGET << 16);
 619                         cmd->scsi_done(cmd);
 620                         return NULL;
 621                 }
 622         }
 623
 624         /*
 625          *
 626          * Logical drive commands
 627          *
 628          */
 629         if(islogical) {
 630                 switch (cmd->cmnd[0]) {
 631                 case TEST_UNIT_READY:
 632 #if MEGA_HAVE_CLUSTERING
 633                         /*
 634                          * Do we support clustering and is the support enabled
 635                          * If no, return success always
 636                          */
 637                         if( !adapter->has_cluster ) {
 638                                 cmd->result = (DID_OK << 16);
 639                                 cmd->scsi_done(cmd);
 640                                 return NULL;
 641                         }
 642
 643                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 644                                 *busy = 1;
 645                                 return NULL;
 646                         }
 647
 648                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 649                         scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
 650                         scb->raw_mbox[3] = ldrv_num;
 651
 652                         scb->dma_direction = PCI_DMA_NONE;
 653
 654                         return scb;
 655 #else
 656                         cmd->result = (DID_OK << 16);
 657                         cmd->scsi_done(cmd);
 658                         return NULL;
 659 #endif
 660
 661                 case MODE_SENSE: {
 662                         char *buf;
 663                         struct scatterlist *sg;
 664
 665                         sg = scsi_sglist(cmd);
 666                         buf = kmap_atomic(sg_page(sg)) + sg->offset;
 667
 668                         memset(buf, 0, cmd->cmnd[4]);
 669                         kunmap_atomic(buf - sg->offset);
 670
 671                         cmd->result = (DID_OK << 16);
 672                         cmd->scsi_done(cmd);
 673                         return NULL;
 674                 }
 675
 676                 case READ_CAPACITY:
 677                 case INQUIRY:
 678
 679                         if(!(adapter->flag & (1L << cmd->device->channel))) {
 680
 681                                 printk(KERN_NOTICE
 682                                         "scsi%d: scanning scsi channel %d ",
 683                                                 adapter->host->host_no,
 684                                                 cmd->device->channel);
 685                                 printk("for logical drives.\n");
 686
 687                                 adapter->flag |= (1L << cmd->device->channel);
 688                         }
 689
 690                         /* Allocate a SCB and initialize passthru */
 691                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 692                                 *busy = 1;
 693                                 return NULL;
 694                         }
 695                         pthru = scb->pthru;
 696
 697                         mbox = (mbox_t *)scb->raw_mbox;
 698                         memset(mbox, 0, sizeof(scb->raw_mbox));
 699                         memset(pthru, 0, sizeof(mega_passthru));
 700
 701                         pthru->timeout = 0;
 702                         pthru->ars = 1;
 703                         pthru->reqsenselen = 14;
 704                         pthru->islogical = 1;
 705                         pthru->logdrv = ldrv_num;
 706                         pthru->cdblen = cmd->cmd_len;
 707                         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 708
 709                         if( adapter->has_64bit_addr ) {
 710                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 711                         }
 712                         else {
 713                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 714                         }
 715
 716                         scb->dma_direction = PCI_DMA_FROMDEVICE;
 717
 718                         pthru->numsgelements = mega_build_sglist(adapter, scb,
 719                                 &pthru->dataxferaddr, &pthru->dataxferlen);
 720
 721                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 722
 723                         return scb;
 724
 725                 case READ_6:
 726                 case WRITE_6:
 727                 case READ_10:
 728                 case WRITE_10:
 729                 case READ_12:
 730                 case WRITE_12:
 731
 732                         /* Allocate a SCB and initialize mailbox */
 733                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 734                                 *busy = 1;
 735                                 return NULL;
 736                         }
 737                         mbox = (mbox_t *)scb->raw_mbox;
 738
 739                         memset(mbox, 0, sizeof(scb->raw_mbox));
 740                         mbox->m_out.logdrv = ldrv_num;
 741
 742                         /*
 743                          * A little hack: 2nd bit is zero for all scsi read
 744                          * commands and is set for all scsi write commands
 745                          */
 746                         if( adapter->has_64bit_addr ) {
 747                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 748                                         MEGA_MBOXCMD_LWRITE64:
 749                                         MEGA_MBOXCMD_LREAD64 ;
 750                         }
 751                         else {
 752                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 753                                         MEGA_MBOXCMD_LWRITE:
 754                                         MEGA_MBOXCMD_LREAD ;
 755                         }
 756
 757                         /*
 758                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
 759                          */
 760                         if( cmd->cmd_len == 6 ) {
 761                                 mbox->m_out.numsectors = (u32) cmd->cmnd[4];
 762                                 mbox->m_out.lba =
 763                                         ((u32)cmd->cmnd[1] << 16) |
 764                                         ((u32)cmd->cmnd[2] << 8) |
 765                                         (u32)cmd->cmnd[3];
 766
 767                                 mbox->m_out.lba &= 0x1FFFFF;
 768
 769 #if MEGA_HAVE_STATS
 770                                 /*
 771                                  * Take modulo 0x80, since the logical drive
 772                                  * number increases by 0x80 when a logical
 773                                  * drive was deleted
 774                                  */
 775                                 if (*cmd->cmnd == READ_6) {
 776                                         adapter->nreads[ldrv_num%0x80]++;
 777                                         adapter->nreadblocks[ldrv_num%0x80] +=
 778                                                 mbox->m_out.numsectors;
 779                                 } else {
 780                                         adapter->nwrites[ldrv_num%0x80]++;
 781                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 782                                                 mbox->m_out.numsectors;
 783                                 }
 784 #endif
 785                         }
 786
 787                         /*
 788                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
 789                          */
 790                         if( cmd->cmd_len == 10 ) {
 791                                 mbox->m_out.numsectors =
 792                                         (u32)cmd->cmnd[8] |
 793                                         ((u32)cmd->cmnd[7] << 8);
 794                                 mbox->m_out.lba =
 795                                         ((u32)cmd->cmnd[2] << 24) |
 796                                         ((u32)cmd->cmnd[3] << 16) |
 797                                         ((u32)cmd->cmnd[4] << 8) |
 798                                         (u32)cmd->cmnd[5];
 799
 800 #if MEGA_HAVE_STATS
 801                                 if (*cmd->cmnd == READ_10) {
 802                                         adapter->nreads[ldrv_num%0x80]++;
 803                                         adapter->nreadblocks[ldrv_num%0x80] +=
 804                                                 mbox->m_out.numsectors;
 805                                 } else {
 806                                         adapter->nwrites[ldrv_num%0x80]++;
 807                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 808                                                 mbox->m_out.numsectors;
 809                                 }
 810 #endif
 811                         }
 812
 813                         /*
 814                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
 815                          */
 816                         if( cmd->cmd_len == 12 ) {
 817                                 mbox->m_out.lba =
 818                                         ((u32)cmd->cmnd[2] << 24) |
 819                                         ((u32)cmd->cmnd[3] << 16) |
 820                                         ((u32)cmd->cmnd[4] << 8) |
 821                                         (u32)cmd->cmnd[5];
 822
 823                                 mbox->m_out.numsectors =
 824                                         ((u32)cmd->cmnd[6] << 24) |
 825                                         ((u32)cmd->cmnd[7] << 16) |
 826                                         ((u32)cmd->cmnd[8] << 8) |
 827                                         (u32)cmd->cmnd[9];
 828
 829 #if MEGA_HAVE_STATS
 830                                 if (*cmd->cmnd == READ_12) {
 831                                         adapter->nreads[ldrv_num%0x80]++;
 832                                         adapter->nreadblocks[ldrv_num%0x80] +=
 833                                                 mbox->m_out.numsectors;
 834                                 } else {
 835                                         adapter->nwrites[ldrv_num%0x80]++;
 836                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 837                                                 mbox->m_out.numsectors;
 838                                 }
 839 #endif
 840                         }
 841
 842                         /*
 843                          * If it is a read command
 844                          */
 845                         if( (*cmd->cmnd & 0x0F) == 0x08 ) {
 846                                 scb->dma_direction = PCI_DMA_FROMDEVICE;
 847                         }
 848                         else {
 849                                 scb->dma_direction = PCI_DMA_TODEVICE;
 850                         }
 851
 852                         /* Calculate Scatter-Gather info */
 853                         mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
 854                                         (u32 *)&mbox->m_out.xferaddr, &seg);
 855
 856                         return scb;
 857
 858 #if MEGA_HAVE_CLUSTERING
 859                 case RESERVE:   /* Fall through */
 860                 case RELEASE:
 861
 862                         /*
 863                          * Do we support clustering and is the support enabled
 864                          */
 865                         if( ! adapter->has_cluster ) {
 866
 867                                 cmd->result = (DID_BAD_TARGET << 16);
 868                                 cmd->scsi_done(cmd);
 869                                 return NULL;
 870                         }
 871
 872                         /* Allocate a SCB and initialize mailbox */
 873                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 874                                 *busy = 1;
 875                                 return NULL;
 876                         }
 877
 878                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 879                         scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
 880                                 MEGA_RESERVE_LD : MEGA_RELEASE_LD;
 881
 882                         scb->raw_mbox[3] = ldrv_num;
 883
 884                         scb->dma_direction = PCI_DMA_NONE;
 885
 886                         return scb;
 887 #endif
 888
 889                 default:
 890                         cmd->result = (DID_BAD_TARGET << 16);
 891                         cmd->scsi_done(cmd);
 892                         return NULL;
 893                 }
 894         }
 895
 896         /*
 897          * Passthru drive commands
 898          */
 899         else {
 900                 /* Allocate a SCB and initialize passthru */
 901                 if(!(scb = mega_allocate_scb(adapter, cmd))) {
 902                         *busy = 1;
 903                         return NULL;
 904                 }
 905
 906                 mbox = (mbox_t *)scb->raw_mbox;
 907                 memset(mbox, 0, sizeof(scb->raw_mbox));
 908
 909                 if( adapter->support_ext_cdb ) {
 910
 911                         epthru = mega_prepare_extpassthru(adapter, scb, cmd,
 912                                         channel, target);
 913
 914                         mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;
 915
 916                         mbox->m_out.xferaddr = scb->epthru_dma_addr;
 917
 918                 }
 919                 else {
 920
 921                         pthru = mega_prepare_passthru(adapter, scb, cmd,
 922                                         channel, target);
 923
 924                         /* Initialize mailbox */
 925                         if( adapter->has_64bit_addr ) {
 926                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 927                         }
 928                         else {
 929                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 930                         }
 931
 932                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 933
 934                 }
 935                 return scb;
 936         }
 937         return NULL;
 938 }
 939
 940
 941 /**
 942  * mega_prepare_passthru()
 943  * @adapter - pointer to our soft state
 944  * @scb - our scsi control block
 945  * @cmd - scsi command from the mid-layer
 946  * @channel - actual channel on the controller
 947  * @target - actual id on the controller.
 948  *
 949  * prepare a command for the scsi physical devices.
 950  */
 951 static mega_passthru *
 952 mega_prepare_passthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
 953                 int channel, int target)
 954 {
 955         mega_passthru *pthru;
 956
 957         pthru = scb->pthru;
 958         memset(pthru, 0, sizeof (mega_passthru));
 959
 960         /* 0=6sec/1=60sec/2=10min/3=3hrs */
 961         pthru->timeout = 2;
 962
 963         pthru->ars = 1;
 964         pthru->reqsenselen = 14;
 965         pthru->islogical = 0;
 966
 967         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
 968
 969         pthru->target = (adapter->flag & BOARD_40LD) ?
 970                 (channel << 4) | target : target;
 971
 972         pthru->cdblen = cmd->cmd_len;
 973         pthru->logdrv = cmd->device->lun;
 974
 975         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 976
 977         /* Not sure about the direction */
 978         scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
 979
 980         /* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
 981         switch (cmd->cmnd[0]) {
 982         case INQUIRY:
 983         case READ_CAPACITY:
 984                 if(!(adapter->flag & (1L << cmd->device->channel))) {
 985
 986                         printk(KERN_NOTICE
 987                                 "scsi%d: scanning scsi channel %d [P%d] ",
 988                                         adapter->host->host_no,
 989                                         cmd->device->channel, channel);
 990                         printk("for physical devices.\n");
 991
 992                         adapter->flag |= (1L << cmd->device->channel);
 993                 }
 994                 /* Fall through */
 995         default:
 996                 pthru->numsgelements = mega_build_sglist(adapter, scb,
 997                                 &pthru->dataxferaddr, &pthru->dataxferlen);
 998                 break;
 999         }
1000         return pthru;
1001 }
1002
1003
1004 /**
1005  * mega_prepare_extpassthru()
1006  * @adapter - pointer to our soft state
1007  * @scb - our scsi control block
1008  * @cmd - scsi command from the mid-layer
1009  * @channel - actual channel on the controller
1010  * @target - actual id on the controller.
1011  *
1012  * prepare a command for the scsi physical devices. This rountine prepares
1013  * commands for devices which can take extended CDBs (>10 bytes)
1014  */
1015 static mega_ext_passthru *
1016 mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb, 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 = PCI_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                         printk(KERN_NOTICE
1049                                 "scsi%d: scanning scsi channel %d [P%d] ",
1050                                         adapter->host->host_no,
1051                                         cmd->device->channel, channel);
1052                         printk("for physical devices.\n");
1053
1054                         adapter->flag |= (1L << cmd->device->channel);
1055                 }
1056                 /* Fall through */
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         printk(KERN_WARNING "megaraid: 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         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
1445                         list_del_init(&scb->list);
1446                         scb->state = SCB_FREE;
1447
1448                         adapter->int_status = status;
1449                         complete(&adapter->int_waitq);
1450                 } else {
1451                         scb = &adapter->scb_list[cmdid];
1452
1453                         /*
1454                          * Make sure f/w has completed a valid command
1455                          */
1456                         if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
1457                                 printk(KERN_CRIT
1458                                         "megaraid: invalid command ");
1459                                 printk("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                                 printk(KERN_WARNING
1471                                 "megaraid: 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                                 printk(KERN_WARNING
1490                                 "megaraid: 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                                 printk(KERN_WARNING
1557                                        "megaraid: invalid sg.\n");
1558                                 c = 0;
1559                         }
1560
1561                         if(IS_RAID_CH(adapter, cmd->device->channel) &&
1562                                         ((c & 0x1F ) == TYPE_DISK)) {
1563                                 status = 0xF0;
1564                         }
1565                 }
1566
1567                 /* clear result; otherwise, success returns corrupt value */
1568                 cmd->result = 0;
1569
1570                 /* Convert MegaRAID status to Linux error code */
1571                 switch (status) {
1572                 case 0x00:      /* SUCCESS , i.e. SCSI_STATUS_GOOD */
1573                         cmd->result |= (DID_OK << 16);
1574                         break;
1575
1576                 case 0x02:      /* ERROR_ABORTED, i.e.
1577                                    SCSI_STATUS_CHECK_CONDITION */
1578
1579                         /* set sense_buffer and result fields */
1580                         if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
1581                                 mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
1582
1583                                 memcpy(cmd->sense_buffer, pthru->reqsensearea,
1584                                                 14);
1585
1586                                 cmd->result = (DRIVER_SENSE << 24) |
1587                                         (DID_OK << 16) |
1588                                         (CHECK_CONDITION << 1);
1589                         }
1590                         else {
1591                                 if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
1592
1593                                         memcpy(cmd->sense_buffer,
1594                                                 epthru->reqsensearea, 14);
1595
1596                                         cmd->result = (DRIVER_SENSE << 24) |
1597                                                 (DID_OK << 16) |
1598                                                 (CHECK_CONDITION << 1);
1599                                 } else {
1600                                         cmd->sense_buffer[0] = 0x70;
1601                                         cmd->sense_buffer[2] = ABORTED_COMMAND;
1602                                         cmd->result |= (CHECK_CONDITION << 1);
1603                                 }
1604                         }
1605                         break;
1606
1607                 case 0x08:      /* ERR_DEST_DRIVE_FAILED, i.e.
1608                                    SCSI_STATUS_BUSY */
1609                         cmd->result |= (DID_BUS_BUSY << 16) | status;
1610                         break;
1611
1612                 default:
1613 #if MEGA_HAVE_CLUSTERING
1614                         /*
1615                          * If TEST_UNIT_READY fails, we know
1616                          * MEGA_RESERVATION_STATUS failed
1617                          */
1618                         if( cmd->cmnd[0] == TEST_UNIT_READY ) {
1619                                 cmd->result |= (DID_ERROR << 16) |
1620                                         (RESERVATION_CONFLICT << 1);
1621                         }
1622                         else
1623                         /*
1624                          * Error code returned is 1 if Reserve or Release
1625                          * failed or the input parameter is invalid
1626                          */
1627                         if( status == 1 &&
1628                                 (cmd->cmnd[0] == RESERVE ||
1629                                          cmd->cmnd[0] == RELEASE) ) {
1630
1631                                 cmd->result |= (DID_ERROR << 16) |
1632                                         (RESERVATION_CONFLICT << 1);
1633                         }
1634                         else
1635 #endif
1636                                 cmd->result |= (DID_BAD_TARGET << 16)|status;
1637                 }
1638
1639                 mega_free_scb(adapter, scb);
1640
1641                 /* Add Scsi_Command to end of completed queue */
1642                 list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
1643         }
1644 }
1645
1646
1647 /*
1648  * mega_runpendq()
1649  *
1650  * Run through the list of completed requests and finish it
1651  */
1652 static void
1653 mega_rundoneq (adapter_t *adapter)
1654 {
1655         Scsi_Cmnd *cmd;
1656         struct list_head *pos;
1657
1658         list_for_each(pos, &adapter->completed_list) {
1659
1660                 struct scsi_pointer* spos = (struct scsi_pointer *)pos;
1661
1662                 cmd = list_entry(spos, Scsi_Cmnd, SCp);
1663                 cmd->scsi_done(cmd);
1664         }
1665
1666         INIT_LIST_HEAD(&adapter->completed_list);
1667 }
1668
1669
1670 /*
1671  * Free a SCB structure
1672  * Note: We assume the scsi commands associated with this scb is not free yet.
1673  */
1674 static void
1675 mega_free_scb(adapter_t *adapter, scb_t *scb)
1676 {
1677         switch( scb->dma_type ) {
1678
1679         case MEGA_DMA_TYPE_NONE:
1680                 break;
1681
1682         case MEGA_SGLIST:
1683                 scsi_dma_unmap(scb->cmd);
1684                 break;
1685         default:
1686                 break;
1687         }
1688
1689         /*
1690          * Remove from the pending list
1691          */
1692         list_del_init(&scb->list);
1693
1694         /* Link the scb back into free list */
1695         scb->state = SCB_FREE;
1696         scb->cmd = NULL;
1697
1698         list_add(&scb->list, &adapter->free_list);
1699 }
1700
1701
1702 static int
1703 __mega_busywait_mbox (adapter_t *adapter)
1704 {
1705         volatile mbox_t *mbox = adapter->mbox;
1706         long counter;
1707
1708         for (counter = 0; counter < 10000; counter++) {
1709                 if (!mbox->m_in.busy)
1710                         return 0;
1711                 udelay(100);
1712                 cond_resched();
1713         }
1714         return -1;              /* give up after 1 second */
1715 }
1716
1717 /*
1718  * Copies data to SGLIST
1719  * Note: For 64 bit cards, we need a minimum of one SG element for read/write
1720  */
1721 static int
1722 mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
1723 {
1724         struct scatterlist *sg;
1725         Scsi_Cmnd       *cmd;
1726         int     sgcnt;
1727         int     idx;
1728
1729         cmd = scb->cmd;
1730
1731         /*
1732          * Copy Scatter-Gather list info into controller structure.
1733          *
1734          * The number of sg elements returned must not exceed our limit
1735          */
1736         sgcnt = scsi_dma_map(cmd);
1737
1738         scb->dma_type = MEGA_SGLIST;
1739
1740         BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);
1741
1742         *len = 0;
1743
1744         if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
1745                 sg = scsi_sglist(cmd);
1746                 scb->dma_h_bulkdata = sg_dma_address(sg);
1747                 *buf = (u32)scb->dma_h_bulkdata;
1748                 *len = sg_dma_len(sg);
1749                 return 0;
1750         }
1751
1752         scsi_for_each_sg(cmd, sg, sgcnt, idx) {
1753                 if (adapter->has_64bit_addr) {
1754                         scb->sgl64[idx].address = sg_dma_address(sg);
1755                         *len += scb->sgl64[idx].length = sg_dma_len(sg);
1756                 } else {
1757                         scb->sgl[idx].address = sg_dma_address(sg);
1758                         *len += scb->sgl[idx].length = sg_dma_len(sg);
1759                 }
1760         }
1761
1762         /* Reset pointer and length fields */
1763         *buf = scb->sgl_dma_addr;
1764
1765         /* Return count of SG requests */
1766         return sgcnt;
1767 }
1768
1769
1770 /*
1771  * mega_8_to_40ld()
1772  *
1773  * takes all info in AdapterInquiry structure and puts it into ProductInfo and
1774  * Enquiry3 structures for later use
1775  */
1776 static void
1777 mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
1778                 mega_product_info *product_info)
1779 {
1780         int i;
1781
1782         product_info->max_commands = inquiry->adapter_info.max_commands;
1783         enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
1784         product_info->nchannels = inquiry->adapter_info.nchannels;
1785
1786         for (i = 0; i < 4; i++) {
1787                 product_info->fw_version[i] =
1788                         inquiry->adapter_info.fw_version[i];
1789
1790                 product_info->bios_version[i] =
1791                         inquiry->adapter_info.bios_version[i];
1792         }
1793         enquiry3->cache_flush_interval =
1794                 inquiry->adapter_info.cache_flush_interval;
1795
1796         product_info->dram_size = inquiry->adapter_info.dram_size;
1797
1798         enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
1799
1800         for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
1801                 enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
1802                 enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
1803                 enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
1804         }
1805
1806         for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
1807                 enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
1808 }
1809
1810 static inline void
1811 mega_free_sgl(adapter_t *adapter)
1812 {
1813         scb_t   *scb;
1814         int     i;
1815
1816         for(i = 0; i < adapter->max_cmds; i++) {
1817
1818                 scb = &adapter->scb_list[i];
1819
1820                 if( scb->sgl64 ) {
1821                         pci_free_consistent(adapter->dev,
1822                                 sizeof(mega_sgl64) * adapter->sglen,
1823                                 scb->sgl64,
1824                                 scb->sgl_dma_addr);
1825
1826                         scb->sgl64 = NULL;
1827                 }
1828
1829                 if( scb->pthru ) {
1830                         pci_free_consistent(adapter->dev, sizeof(mega_passthru),
1831                                 scb->pthru, scb->pthru_dma_addr);
1832
1833                         scb->pthru = NULL;
1834                 }
1835
1836                 if( scb->epthru ) {
1837                         pci_free_consistent(adapter->dev,
1838                                 sizeof(mega_ext_passthru),
1839                                 scb->epthru, scb->epthru_dma_addr);
1840
1841                         scb->epthru = NULL;
1842                 }
1843
1844         }
1845 }
1846
1847
1848 /*
1849  * Get information about the card/driver
1850  */
1851 const char *
1852 megaraid_info(struct Scsi_Host *host)
1853 {
1854         static char buffer[512];
1855         adapter_t *adapter;
1856
1857         adapter = (adapter_t *)host->hostdata;
1858
1859         sprintf (buffer,
1860                  "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
1861                  adapter->fw_version, adapter->product_info.max_commands,
1862                  adapter->host->max_id, adapter->host->max_channel,
1863                  (u32)adapter->host->max_lun);
1864         return buffer;
1865 }
1866
1867 /*
1868  * Abort a previous SCSI request. Only commands on the pending list can be
1869  * aborted. All the commands issued to the F/W must complete.
1870  */
1871 static int
1872 megaraid_abort(Scsi_Cmnd *cmd)
1873 {
1874         adapter_t       *adapter;
1875         int             rval;
1876
1877         adapter = (adapter_t *)cmd->device->host->hostdata;
1878
1879         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
1880
1881         /*
1882          * This is required here to complete any completed requests
1883          * to be communicated over to the mid layer.
1884          */
1885         mega_rundoneq(adapter);
1886
1887         return rval;
1888 }
1889
1890
1891 static int
1892 megaraid_reset(struct scsi_cmnd *cmd)
1893 {
1894         adapter_t       *adapter;
1895         megacmd_t       mc;
1896         int             rval;
1897
1898         adapter = (adapter_t *)cmd->device->host->hostdata;
1899
1900 #if MEGA_HAVE_CLUSTERING
1901         mc.cmd = MEGA_CLUSTER_CMD;
1902         mc.opcode = MEGA_RESET_RESERVATIONS;
1903
1904         if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
1905                 printk(KERN_WARNING
1906                                 "megaraid: reservation reset failed.\n");
1907         }
1908         else {
1909                 printk(KERN_INFO "megaraid: reservation reset.\n");
1910         }
1911 #endif
1912
1913         spin_lock_irq(&adapter->lock);
1914
1915         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
1916
1917         /*
1918          * This is required here to complete any completed requests
1919          * to be communicated over to the mid layer.
1920          */
1921         mega_rundoneq(adapter);
1922         spin_unlock_irq(&adapter->lock);
1923
1924         return rval;
1925 }
1926
1927 /**
1928  * megaraid_abort_and_reset()
1929  * @adapter - megaraid soft state
1930  * @cmd - scsi command to be aborted or reset
1931  * @aor - abort or reset flag
1932  *
1933  * Try to locate the scsi command in the pending queue. If found and is not
1934  * issued to the controller, abort/reset it. Otherwise return failure
1935  */
1936 static int
1937 megaraid_abort_and_reset(adapter_t *adapter, Scsi_Cmnd *cmd, int aor)
1938 {
1939         struct list_head        *pos, *next;
1940         scb_t                   *scb;
1941
1942         printk(KERN_WARNING "megaraid: %s cmd=%x <c=%d t=%d l=%d>\n",
1943              (aor == SCB_ABORT)? "ABORTING":"RESET",
1944              cmd->cmnd[0], cmd->device->channel,
1945              cmd->device->id, (u32)cmd->device->lun);
1946
1947         if(list_empty(&adapter->pending_list))
1948                 return FAILED;
1949
1950         list_for_each_safe(pos, next, &adapter->pending_list) {
1951
1952                 scb = list_entry(pos, scb_t, list);
1953
1954                 if (scb->cmd == cmd) { /* Found command */
1955
1956                         scb->state |= aor;
1957
1958                         /*
1959                          * Check if this command has firmware ownership. If
1960                          * yes, we cannot reset this command. Whenever f/w
1961                          * completes this command, we will return appropriate
1962                          * status from ISR.
1963                          */
1964                         if( scb->state & SCB_ISSUED ) {
1965
1966                                 printk(KERN_WARNING
1967                                         "megaraid: %s[%x], fw owner.\n",
1968                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1969                                         scb->idx);
1970
1971                                 return FAILED;
1972                         }
1973                         else {
1974
1975                                 /*
1976                                  * Not yet issued! Remove from the pending
1977                                  * list
1978                                  */
1979                                 printk(KERN_WARNING
1980                                         "megaraid: %s-[%x], driver owner.\n",
1981                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1982                                         scb->idx);
1983
1984                                 mega_free_scb(adapter, scb);
1985
1986                                 if( aor == SCB_ABORT ) {
1987                                         cmd->result = (DID_ABORT << 16);
1988                                 }
1989                                 else {
1990                                         cmd->result = (DID_RESET << 16);
1991                                 }
1992
1993                                 list_add_tail(SCSI_LIST(cmd),
1994                                                 &adapter->completed_list);
1995
1996                                 return SUCCESS;
1997                         }
1998                 }
1999         }
2000
2001         return FAILED;
2002 }
2003
2004 static inline int
2005 make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
2006 {
2007         *pdev = pci_alloc_dev(NULL);
2008
2009         if( *pdev == NULL ) return -1;
2010
2011         memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
2012
2013         if( pci_set_dma_mask(*pdev, DMA_BIT_MASK(32)) != 0 ) {
2014                 kfree(*pdev);
2015                 return -1;
2016         }
2017
2018         return 0;
2019 }
2020
2021 static inline void
2022 free_local_pdev(struct pci_dev *pdev)
2023 {
2024         kfree(pdev);
2025 }
2026
2027 /**
2028  * mega_allocate_inquiry()
2029  * @dma_handle - handle returned for dma address
2030  * @pdev - handle to pci device
2031  *
2032  * allocates memory for inquiry structure
2033  */
2034 static inline void *
2035 mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
2036 {
2037         return pci_alloc_consistent(pdev, sizeof(mega_inquiry3), dma_handle);
2038 }
2039
2040
2041 static inline void
2042 mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
2043 {
2044         pci_free_consistent(pdev, sizeof(mega_inquiry3), inquiry, dma_handle);
2045 }
2046
2047
2048 #ifdef CONFIG_PROC_FS
2049 /* Following code handles /proc fs  */
2050
2051 /**
2052  * proc_show_config()
2053  * @m - Synthetic file construction data
2054  * @v - File iterator
2055  *
2056  * Display configuration information about the controller.
2057  */
2058 static int
2059 proc_show_config(struct seq_file *m, void *v)
2060 {
2061
2062         adapter_t *adapter = m->private;
2063
2064         seq_puts(m, MEGARAID_VERSION);
2065         if(adapter->product_info.product_name[0])
2066                 seq_printf(m, "%s\n", adapter->product_info.product_name);
2067
2068         seq_puts(m, "Controller Type: ");
2069
2070         if( adapter->flag & BOARD_MEMMAP )
2071                 seq_puts(m, "438/466/467/471/493/518/520/531/532\n");
2072         else
2073                 seq_puts(m, "418/428/434\n");
2074
2075         if(adapter->flag & BOARD_40LD)
2076                 seq_puts(m, "Controller Supports 40 Logical Drives\n");
2077
2078         if(adapter->flag & BOARD_64BIT)
2079                 seq_puts(m, "Controller capable of 64-bit memory addressing\n");
2080         if( adapter->has_64bit_addr )
2081                 seq_puts(m, "Controller using 64-bit memory addressing\n");
2082         else
2083                 seq_puts(m, "Controller is not using 64-bit memory addressing\n");
2084
2085         seq_printf(m, "Base = %08lx, Irq = %d, ",
2086                    adapter->base, adapter->host->irq);
2087
2088         seq_printf(m, "Logical Drives = %d, Channels = %d\n",
2089                    adapter->numldrv, adapter->product_info.nchannels);
2090
2091         seq_printf(m, "Version =%s:%s, DRAM = %dMb\n",
2092                    adapter->fw_version, adapter->bios_version,
2093                    adapter->product_info.dram_size);
2094
2095         seq_printf(m, "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
2096                    adapter->product_info.max_commands, adapter->max_cmds);
2097
2098         seq_printf(m, "support_ext_cdb    = %d\n", adapter->support_ext_cdb);
2099         seq_printf(m, "support_random_del = %d\n", adapter->support_random_del);
2100         seq_printf(m, "boot_ldrv_enabled  = %d\n", adapter->boot_ldrv_enabled);
2101         seq_printf(m, "boot_ldrv          = %d\n", adapter->boot_ldrv);
2102         seq_printf(m, "boot_pdrv_enabled  = %d\n", adapter->boot_pdrv_enabled);
2103         seq_printf(m, "boot_pdrv_ch       = %d\n", adapter->boot_pdrv_ch);
2104         seq_printf(m, "boot_pdrv_tgt      = %d\n", adapter->boot_pdrv_tgt);
2105         seq_printf(m, "quiescent          = %d\n",
2106                    atomic_read(&adapter->quiescent));
2107         seq_printf(m, "has_cluster        = %d\n", adapter->has_cluster);
2108
2109         seq_puts(m, "\nModule Parameters:\n");
2110         seq_printf(m, "max_cmd_per_lun    = %d\n", max_cmd_per_lun);
2111         seq_printf(m, "max_sectors_per_io = %d\n", max_sectors_per_io);
2112         return 0;
2113 }
2114
2115 /**
2116  * proc_show_stat()
2117  * @m - Synthetic file construction data
2118  * @v - File iterator
2119  *
2120  * Display statistical information about the I/O activity.
2121  */
2122 static int
2123 proc_show_stat(struct seq_file *m, void *v)
2124 {
2125         adapter_t *adapter = m->private;
2126 #if MEGA_HAVE_STATS
2127         int     i;
2128 #endif
2129
2130         seq_puts(m, "Statistical Information for this controller\n");
2131         seq_printf(m, "pend_cmds = %d\n", atomic_read(&adapter->pend_cmds));
2132 #if MEGA_HAVE_STATS
2133         for(i = 0; i < adapter->numldrv; i++) {
2134                 seq_printf(m, "Logical Drive %d:\n", i);
2135                 seq_printf(m, "\tReads Issued = %lu, Writes Issued = %lu\n",
2136                            adapter->nreads[i], adapter->nwrites[i]);
2137                 seq_printf(m, "\tSectors Read = %lu, Sectors Written = %lu\n",
2138                            adapter->nreadblocks[i], adapter->nwriteblocks[i]);
2139                 seq_printf(m, "\tRead errors = %lu, Write errors = %lu\n\n",
2140                            adapter->rd_errors[i], adapter->wr_errors[i]);
2141         }
2142 #else
2143         seq_puts(m, "IO and error counters not compiled in driver.\n");
2144 #endif
2145         return 0;
2146 }
2147
2148
2149 /**
2150  * proc_show_mbox()
2151  * @m - Synthetic file construction data
2152  * @v - File iterator
2153  *
2154  * Display mailbox information for the last command issued. This information
2155  * is good for debugging.
2156  */
2157 static int
2158 proc_show_mbox(struct seq_file *m, void *v)
2159 {
2160         adapter_t       *adapter = m->private;
2161         volatile mbox_t *mbox = adapter->mbox;
2162
2163         seq_puts(m, "Contents of Mail Box Structure\n");
2164         seq_printf(m, "  Fw Command   = 0x%02x\n", mbox->m_out.cmd);
2165         seq_printf(m, "  Cmd Sequence = 0x%02x\n", mbox->m_out.cmdid);
2166         seq_printf(m, "  No of Sectors= %04d\n", mbox->m_out.numsectors);
2167         seq_printf(m, "  LBA          = 0x%02x\n", mbox->m_out.lba);
2168         seq_printf(m, "  DTA          = 0x%08x\n", mbox->m_out.xferaddr);
2169         seq_printf(m, "  Logical Drive= 0x%02x\n", mbox->m_out.logdrv);
2170         seq_printf(m, "  No of SG Elmt= 0x%02x\n", mbox->m_out.numsgelements);
2171         seq_printf(m, "  Busy         = %01x\n", mbox->m_in.busy);
2172         seq_printf(m, "  Status       = 0x%02x\n", mbox->m_in.status);
2173         return 0;
2174 }
2175
2176
2177 /**
2178  * proc_show_rebuild_rate()
2179  * @m - Synthetic file construction data
2180  * @v - File iterator
2181  *
2182  * Display current rebuild rate
2183  */
2184 static int
2185 proc_show_rebuild_rate(struct seq_file *m, void *v)
2186 {
2187         adapter_t       *adapter = m->private;
2188         dma_addr_t      dma_handle;
2189         caddr_t         inquiry;
2190         struct pci_dev  *pdev;
2191
2192         if( make_local_pdev(adapter, &pdev) != 0 )
2193                 return 0;
2194
2195         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2196                 goto free_pdev;
2197
2198         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2199                 seq_puts(m, "Adapter inquiry failed.\n");
2200                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2201                 goto free_inquiry;
2202         }
2203
2204         if( adapter->flag & BOARD_40LD )
2205                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2206                            ((mega_inquiry3 *)inquiry)->rebuild_rate);
2207         else
2208                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2209                         ((mraid_ext_inquiry *)
2210                          inquiry)->raid_inq.adapter_info.rebuild_rate);
2211
2212 free_inquiry:
2213         mega_free_inquiry(inquiry, dma_handle, pdev);
2214 free_pdev:
2215         free_local_pdev(pdev);
2216         return 0;
2217 }
2218
2219
2220 /**
2221  * proc_show_battery()
2222  * @m - Synthetic file construction data
2223  * @v - File iterator
2224  *
2225  * Display information about the battery module on the controller.
2226  */
2227 static int
2228 proc_show_battery(struct seq_file *m, void *v)
2229 {
2230         adapter_t       *adapter = m->private;
2231         dma_addr_t      dma_handle;
2232         caddr_t         inquiry;
2233         struct pci_dev  *pdev;
2234         u8      battery_status;
2235
2236         if( make_local_pdev(adapter, &pdev) != 0 )
2237                 return 0;
2238
2239         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2240                 goto free_pdev;
2241
2242         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2243                 seq_puts(m, "Adapter inquiry failed.\n");
2244                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2245                 goto free_inquiry;
2246         }
2247
2248         if( adapter->flag & BOARD_40LD ) {
2249                 battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
2250         }
2251         else {
2252                 battery_status = ((mraid_ext_inquiry *)inquiry)->
2253                         raid_inq.adapter_info.battery_status;
2254         }
2255
2256         /*
2257          * Decode the battery status
2258          */
2259         seq_printf(m, "Battery Status:[%d]", battery_status);
2260
2261         if(battery_status == MEGA_BATT_CHARGE_DONE)
2262                 seq_puts(m, " Charge Done");
2263
2264         if(battery_status & MEGA_BATT_MODULE_MISSING)
2265                 seq_puts(m, " Module Missing");
2266
2267         if(battery_status & MEGA_BATT_LOW_VOLTAGE)
2268                 seq_puts(m, " Low Voltage");
2269
2270         if(battery_status & MEGA_BATT_TEMP_HIGH)
2271                 seq_puts(m, " Temperature High");
2272
2273         if(battery_status & MEGA_BATT_PACK_MISSING)
2274                 seq_puts(m, " Pack Missing");
2275
2276         if(battery_status & MEGA_BATT_CHARGE_INPROG)
2277                 seq_puts(m, " Charge In-progress");
2278
2279         if(battery_status & MEGA_BATT_CHARGE_FAIL)
2280                 seq_puts(m, " Charge Fail");
2281
2282         if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
2283                 seq_puts(m, " Cycles Exceeded");
2284
2285         seq_putc(m, '\n');
2286
2287 free_inquiry:
2288         mega_free_inquiry(inquiry, dma_handle, pdev);
2289 free_pdev:
2290         free_local_pdev(pdev);
2291         return 0;
2292 }
2293
2294
2295 /*
2296  * Display scsi inquiry
2297  */
2298 static void
2299 mega_print_inquiry(struct seq_file *m, char *scsi_inq)
2300 {
2301         int     i;
2302
2303         seq_puts(m, "  Vendor: ");
2304         seq_write(m, scsi_inq + 8, 8);
2305         seq_puts(m, "  Model: ");
2306         seq_write(m, scsi_inq + 16, 16);
2307         seq_puts(m, "  Rev: ");
2308         seq_write(m, scsi_inq + 32, 4);
2309         seq_putc(m, '\n');
2310
2311         i = scsi_inq[0] & 0x1f;
2312         seq_printf(m, "  Type:   %s ", scsi_device_type(i));
2313
2314         seq_printf(m, "                 ANSI SCSI revision: %02x",
2315                    scsi_inq[2] & 0x07);
2316
2317         if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
2318                 seq_puts(m, " CCS\n");
2319         else
2320                 seq_putc(m, '\n');
2321 }
2322
2323 /**
2324  * proc_show_pdrv()
2325  * @m - Synthetic file construction data
2326  * @page - buffer to write the data in
2327  * @adapter - pointer to our soft state
2328  *
2329  * Display information about the physical drives.
2330  */
2331 static int
2332 proc_show_pdrv(struct seq_file *m, adapter_t *adapter, int channel)
2333 {
2334         dma_addr_t      dma_handle;
2335         char            *scsi_inq;
2336         dma_addr_t      scsi_inq_dma_handle;
2337         caddr_t         inquiry;
2338         struct pci_dev  *pdev;
2339         u8      *pdrv_state;
2340         u8      state;
2341         int     tgt;
2342         int     max_channels;
2343         int     i;
2344
2345         if( make_local_pdev(adapter, &pdev) != 0 )
2346                 return 0;
2347
2348         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2349                 goto free_pdev;
2350
2351         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2352                 seq_puts(m, "Adapter inquiry failed.\n");
2353                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2354                 goto free_inquiry;
2355         }
2356
2357
2358         scsi_inq = pci_alloc_consistent(pdev, 256, &scsi_inq_dma_handle);
2359         if( scsi_inq == NULL ) {
2360                 seq_puts(m, "memory not available for scsi inq.\n");
2361                 goto free_inquiry;
2362         }
2363
2364         if( adapter->flag & BOARD_40LD ) {
2365                 pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
2366         }
2367         else {
2368                 pdrv_state = ((mraid_ext_inquiry *)inquiry)->
2369                         raid_inq.pdrv_info.pdrv_state;
2370         }
2371
2372         max_channels = adapter->product_info.nchannels;
2373
2374         if( channel >= max_channels ) {
2375                 goto free_pci;
2376         }
2377
2378         for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
2379
2380                 i = channel*16 + tgt;
2381
2382                 state = *(pdrv_state + i);
2383                 switch( state & 0x0F ) {
2384                 case PDRV_ONLINE:
2385                         seq_printf(m, "Channel:%2d Id:%2d State: Online",
2386                                    channel, tgt);
2387                         break;
2388
2389                 case PDRV_FAILED:
2390                         seq_printf(m, "Channel:%2d Id:%2d State: Failed",
2391                                    channel, tgt);
2392                         break;
2393
2394                 case PDRV_RBLD:
2395                         seq_printf(m, "Channel:%2d Id:%2d State: Rebuild",
2396                                    channel, tgt);
2397                         break;
2398
2399                 case PDRV_HOTSPARE:
2400                         seq_printf(m, "Channel:%2d Id:%2d State: Hot spare",
2401                                    channel, tgt);
2402                         break;
2403
2404                 default:
2405                         seq_printf(m, "Channel:%2d Id:%2d State: Un-configured",
2406                                    channel, tgt);
2407                         break;
2408                 }
2409
2410                 /*
2411                  * This interface displays inquiries for disk drives
2412                  * only. Inquries for logical drives and non-disk
2413                  * devices are available through /proc/scsi/scsi
2414                  */
2415                 memset(scsi_inq, 0, 256);
2416                 if( mega_internal_dev_inquiry(adapter, channel, tgt,
2417                                 scsi_inq_dma_handle) ||
2418                                 (scsi_inq[0] & 0x1F) != TYPE_DISK ) {
2419                         continue;
2420                 }
2421
2422                 /*
2423                  * Check for overflow. We print less than 240
2424                  * characters for inquiry
2425                  */
2426                 seq_puts(m, ".\n");
2427                 mega_print_inquiry(m, scsi_inq);
2428         }
2429
2430 free_pci:
2431         pci_free_consistent(pdev, 256, scsi_inq, scsi_inq_dma_handle);
2432 free_inquiry:
2433         mega_free_inquiry(inquiry, dma_handle, pdev);
2434 free_pdev:
2435         free_local_pdev(pdev);
2436         return 0;
2437 }
2438
2439 /**
2440  * proc_show_pdrv_ch0()
2441  * @m - Synthetic file construction data
2442  * @v - File iterator
2443  *
2444  * Display information about the physical drives on physical channel 0.
2445  */
2446 static int
2447 proc_show_pdrv_ch0(struct seq_file *m, void *v)
2448 {
2449         return proc_show_pdrv(m, m->private, 0);
2450 }
2451
2452
2453 /**
2454  * proc_show_pdrv_ch1()
2455  * @m - Synthetic file construction data
2456  * @v - File iterator
2457  *
2458  * Display information about the physical drives on physical channel 1.
2459  */
2460 static int
2461 proc_show_pdrv_ch1(struct seq_file *m, void *v)
2462 {
2463         return proc_show_pdrv(m, m->private, 1);
2464 }
2465
2466
2467 /**
2468  * proc_show_pdrv_ch2()
2469  * @m - Synthetic file construction data
2470  * @v - File iterator
2471  *
2472  * Display information about the physical drives on physical channel 2.
2473  */
2474 static int
2475 proc_show_pdrv_ch2(struct seq_file *m, void *v)
2476 {
2477         return proc_show_pdrv(m, m->private, 2);
2478 }
2479
2480
2481 /**
2482  * proc_show_pdrv_ch3()
2483  * @m - Synthetic file construction data
2484  * @v - File iterator
2485  *
2486  * Display information about the physical drives on physical channel 3.
2487  */
2488 static int
2489 proc_show_pdrv_ch3(struct seq_file *m, void *v)
2490 {
2491         return proc_show_pdrv(m, m->private, 3);
2492 }
2493
2494
2495 /**
2496  * proc_show_rdrv()
2497  * @m - Synthetic file construction data
2498  * @adapter - pointer to our soft state
2499  * @start - starting logical drive to display
2500  * @end - ending logical drive to display
2501  *
2502  * We do not print the inquiry information since its already available through
2503  * /proc/scsi/scsi interface
2504  */
2505 static int
2506 proc_show_rdrv(struct seq_file *m, adapter_t *adapter, int start, int end )
2507 {
2508         dma_addr_t      dma_handle;
2509         logdrv_param    *lparam;
2510         megacmd_t       mc;
2511         char            *disk_array;
2512         dma_addr_t      disk_array_dma_handle;
2513         caddr_t         inquiry;
2514         struct pci_dev  *pdev;
2515         u8      *rdrv_state;
2516         int     num_ldrv;
2517         u32     array_sz;
2518         int     i;
2519
2520         if( make_local_pdev(adapter, &pdev) != 0 )
2521                 return 0;
2522
2523         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2524                 goto free_pdev;
2525
2526         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2527                 seq_puts(m, "Adapter inquiry failed.\n");
2528                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2529                 goto free_inquiry;
2530         }
2531
2532         memset(&mc, 0, sizeof(megacmd_t));
2533
2534         if( adapter->flag & BOARD_40LD ) {
2535                 array_sz = sizeof(disk_array_40ld);
2536
2537                 rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
2538
2539                 num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
2540         }
2541         else {
2542                 array_sz = sizeof(disk_array_8ld);
2543
2544                 rdrv_state = ((mraid_ext_inquiry *)inquiry)->
2545                         raid_inq.logdrv_info.ldrv_state;
2546
2547                 num_ldrv = ((mraid_ext_inquiry *)inquiry)->
2548                         raid_inq.logdrv_info.num_ldrv;
2549         }
2550
2551         disk_array = pci_alloc_consistent(pdev, array_sz,
2552                         &disk_array_dma_handle);
2553
2554         if( disk_array == NULL ) {
2555                 seq_puts(m, "memory not available.\n");
2556                 goto free_inquiry;
2557         }
2558
2559         mc.xferaddr = (u32)disk_array_dma_handle;
2560
2561         if( adapter->flag & BOARD_40LD ) {
2562                 mc.cmd = FC_NEW_CONFIG;
2563                 mc.opcode = OP_DCMD_READ_CONFIG;
2564
2565                 if( mega_internal_command(adapter, &mc, NULL) ) {
2566                         seq_puts(m, "40LD read config failed.\n");
2567                         goto free_pci;
2568                 }
2569
2570         }
2571         else {
2572                 mc.cmd = NEW_READ_CONFIG_8LD;
2573
2574                 if( mega_internal_command(adapter, &mc, NULL) ) {
2575                         mc.cmd = READ_CONFIG_8LD;
2576                         if( mega_internal_command(adapter, &mc, NULL) ) {
2577                                 seq_puts(m, "8LD read config failed.\n");
2578                                 goto free_pci;
2579                         }
2580                 }
2581         }
2582
2583         for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
2584
2585                 if( adapter->flag & BOARD_40LD ) {
2586                         lparam =
2587                         &((disk_array_40ld *)disk_array)->ldrv[i].lparam;
2588                 }
2589                 else {
2590                         lparam =
2591                         &((disk_array_8ld *)disk_array)->ldrv[i].lparam;
2592                 }
2593
2594                 /*
2595                  * Check for overflow. We print less than 240 characters for
2596                  * information about each logical drive.
2597                  */
2598                 seq_printf(m, "Logical drive:%2d:, ", i);
2599
2600                 switch( rdrv_state[i] & 0x0F ) {
2601                 case RDRV_OFFLINE:
2602                         seq_puts(m, "state: offline");
2603                         break;
2604                 case RDRV_DEGRADED:
2605                         seq_puts(m, "state: degraded");
2606                         break;
2607                 case RDRV_OPTIMAL:
2608                         seq_puts(m, "state: optimal");
2609                         break;
2610                 case RDRV_DELETED:
2611                         seq_puts(m, "state: deleted");
2612                         break;
2613                 default:
2614                         seq_puts(m, "state: unknown");
2615                         break;
2616                 }
2617
2618                 /*
2619                  * Check if check consistency or initialization is going on
2620                  * for this logical drive.
2621                  */
2622                 if( (rdrv_state[i] & 0xF0) == 0x20 )
2623                         seq_puts(m, ", check-consistency in progress");
2624                 else if( (rdrv_state[i] & 0xF0) == 0x10 )
2625                         seq_puts(m, ", initialization in progress");
2626
2627                 seq_putc(m, '\n');
2628
2629                 seq_printf(m, "Span depth:%3d, ", lparam->span_depth);
2630                 seq_printf(m, "RAID level:%3d, ", lparam->level);
2631                 seq_printf(m, "Stripe size:%3d, ",
2632                            lparam->stripe_sz ? lparam->stripe_sz/2: 128);
2633                 seq_printf(m, "Row size:%3d\n", lparam->row_size);
2634
2635                 seq_puts(m, "Read Policy: ");
2636                 switch(lparam->read_ahead) {
2637                 case NO_READ_AHEAD:
2638                         seq_puts(m, "No read ahead, ");
2639                         break;
2640                 case READ_AHEAD:
2641                         seq_puts(m, "Read ahead, ");
2642                         break;
2643                 case ADAP_READ_AHEAD:
2644                         seq_puts(m, "Adaptive, ");
2645                         break;
2646
2647                 }
2648
2649                 seq_puts(m, "Write Policy: ");
2650                 switch(lparam->write_mode) {
2651                 case WRMODE_WRITE_THRU:
2652                         seq_puts(m, "Write thru, ");
2653                         break;
2654                 case WRMODE_WRITE_BACK:
2655                         seq_puts(m, "Write back, ");
2656                         break;
2657                 }
2658
2659                 seq_puts(m, "Cache Policy: ");
2660                 switch(lparam->direct_io) {
2661                 case CACHED_IO:
2662                         seq_puts(m, "Cached IO\n\n");
2663                         break;
2664                 case DIRECT_IO:
2665                         seq_puts(m, "Direct IO\n\n");
2666                         break;
2667                 }
2668         }
2669
2670 free_pci:
2671         pci_free_consistent(pdev, array_sz, disk_array,
2672                         disk_array_dma_handle);
2673 free_inquiry:
2674         mega_free_inquiry(inquiry, dma_handle, pdev);
2675 free_pdev:
2676         free_local_pdev(pdev);
2677         return 0;
2678 }
2679
2680 /**
2681  * proc_show_rdrv_10()
2682  * @m - Synthetic file construction data
2683  * @v - File iterator
2684  *
2685  * Display real time information about the logical drives 0 through 9.
2686  */
2687 static int
2688 proc_show_rdrv_10(struct seq_file *m, void *v)
2689 {
2690         return proc_show_rdrv(m, m->private, 0, 9);
2691 }
2692
2693
2694 /**
2695  * proc_show_rdrv_20()
2696  * @m - Synthetic file construction data
2697  * @v - File iterator
2698  *
2699  * Display real time information about the logical drives 0 through 9.
2700  */
2701 static int
2702 proc_show_rdrv_20(struct seq_file *m, void *v)
2703 {
2704         return proc_show_rdrv(m, m->private, 10, 19);
2705 }
2706
2707
2708 /**
2709  * proc_show_rdrv_30()
2710  * @m - Synthetic file construction data
2711  * @v - File iterator
2712  *
2713  * Display real time information about the logical drives 0 through 9.
2714  */
2715 static int
2716 proc_show_rdrv_30(struct seq_file *m, void *v)
2717 {
2718         return proc_show_rdrv(m, m->private, 20, 29);
2719 }
2720
2721
2722 /**
2723  * proc_show_rdrv_40()
2724  * @m - Synthetic file construction data
2725  * @v - File iterator
2726  *
2727  * Display real time information about the logical drives 0 through 9.
2728  */
2729 static int
2730 proc_show_rdrv_40(struct seq_file *m, void *v)
2731 {
2732         return proc_show_rdrv(m, m->private, 30, 39);
2733 }
2734
2735
2736 /*
2737  * seq_file wrappers for procfile show routines.
2738  */
2739 static int mega_proc_open(struct inode *inode, struct file *file)
2740 {
2741         adapter_t *adapter = proc_get_parent_data(inode);
2742         int (*show)(struct seq_file *, void *) = PDE_DATA(inode);
2743
2744         return single_open(file, show, adapter);
2745 }
2746
2747 static const struct file_operations mega_proc_fops = {
2748         .open           = mega_proc_open,
2749         .read           = seq_read,
2750         .llseek         = seq_lseek,
2751         .release        = single_release,
2752 };
2753
2754 /*
2755  * Table of proc files we need to create.
2756  */
2757 struct mega_proc_file {
2758         const char *name;
2759         unsigned short ptr_offset;
2760         int (*show) (struct seq_file *m, void *v);
2761 };
2762
2763 static const struct mega_proc_file mega_proc_files[] = {
2764         { "config",           offsetof(adapter_t, proc_read), proc_show_config },
2765         { "stat",             offsetof(adapter_t, proc_stat), proc_show_stat },
2766         { "mailbox",          offsetof(adapter_t, proc_mbox), proc_show_mbox },
2767 #if MEGA_HAVE_ENH_PROC
2768         { "rebuild-rate",     offsetof(adapter_t, proc_rr), proc_show_rebuild_rate },
2769         { "battery-status",   offsetof(adapter_t, proc_battery), proc_show_battery },
2770         { "diskdrives-ch0",   offsetof(adapter_t, proc_pdrvstat[0]), proc_show_pdrv_ch0 },
2771         { "diskdrives-ch1",   offsetof(adapter_t, proc_pdrvstat[1]), proc_show_pdrv_ch1 },
2772         { "diskdrives-ch2",   offsetof(adapter_t, proc_pdrvstat[2]), proc_show_pdrv_ch2 },
2773         { "diskdrives-ch3",   offsetof(adapter_t, proc_pdrvstat[3]), proc_show_pdrv_ch3 },
2774         { "raiddrives-0-9",   offsetof(adapter_t, proc_rdrvstat[0]), proc_show_rdrv_10 },
2775         { "raiddrives-10-19", offsetof(adapter_t, proc_rdrvstat[1]), proc_show_rdrv_20 },
2776         { "raiddrives-20-29", offsetof(adapter_t, proc_rdrvstat[2]), proc_show_rdrv_30 },
2777         { "raiddrives-30-39", offsetof(adapter_t, proc_rdrvstat[3]), proc_show_rdrv_40 },
2778 #endif
2779         { NULL }
2780 };
2781
2782 /**
2783  * mega_create_proc_entry()
2784  * @index - index in soft state array
2785  * @parent - parent node for this /proc entry
2786  *
2787  * Creates /proc entries for our controllers.
2788  */
2789 static void
2790 mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2791 {
2792         const struct mega_proc_file *f;
2793         adapter_t       *adapter = hba_soft_state[index];
2794         struct proc_dir_entry   *dir, *de, **ppde;
2795         u8              string[16];
2796
2797         sprintf(string, "hba%d", adapter->host->host_no);
2798
2799         dir = adapter->controller_proc_dir_entry =
2800                 proc_mkdir_data(string, 0, parent, adapter);
2801         if(!dir) {
2802                 printk(KERN_WARNING "\nmegaraid: proc_mkdir failed\n");
2803                 return;
2804         }
2805
2806         for (f = mega_proc_files; f->name; f++) {
2807                 de = proc_create_data(f->name, S_IRUSR, dir, &mega_proc_fops,
2808                                       f->show);
2809                 if (!de) {
2810                         printk(KERN_WARNING "\nmegaraid: proc_create failed\n");
2811                         return;
2812                 }
2813
2814                 ppde = (void *)adapter + f->ptr_offset;
2815                 *ppde = de;
2816         }
2817 }
2818
2819 #else
2820 static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2821 {
2822 }
2823 #endif
2824
2825
2826 /**
2827  * megaraid_biosparam()
2828  *
2829  * Return the disk geometry for a particular disk
2830  */
2831 static int
2832 megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
2833                     sector_t capacity, int geom[])
2834 {
2835         adapter_t       *adapter;
2836         unsigned char   *bh;
2837         int     heads;
2838         int     sectors;
2839         int     cylinders;
2840         int     rval;
2841
2842         /* Get pointer to host config structure */
2843         adapter = (adapter_t *)sdev->host->hostdata;
2844
2845         if (IS_RAID_CH(adapter, sdev->channel)) {
2846                         /* Default heads (64) & sectors (32) */
2847                         heads = 64;
2848                         sectors = 32;
2849                         cylinders = (ulong)capacity / (heads * sectors);
2850
2851                         /*
2852                          * Handle extended translation size for logical drives
2853                          * > 1Gb
2854                          */
2855                         if ((ulong)capacity >= 0x200000) {
2856                                 heads = 255;
2857                                 sectors = 63;
2858                                 cylinders = (ulong)capacity / (heads * sectors);
2859                         }
2860
2861                         /* return result */
2862                         geom[0] = heads;
2863                         geom[1] = sectors;
2864                         geom[2] = cylinders;
2865         }
2866         else {
2867                 bh = scsi_bios_ptable(bdev);
2868
2869                 if( bh ) {
2870                         rval = scsi_partsize(bh, capacity,
2871                                             &geom[2], &geom[0], &geom[1]);
2872                         kfree(bh);
2873                         if( rval != -1 )
2874                                 return rval;
2875                 }
2876
2877                 printk(KERN_INFO
2878                 "megaraid: invalid partition on this disk on channel %d\n",
2879                                 sdev->channel);
2880
2881                 /* Default heads (64) & sectors (32) */
2882                 heads = 64;
2883                 sectors = 32;
2884                 cylinders = (ulong)capacity / (heads * sectors);
2885
2886                 /* Handle extended translation size for logical drives > 1Gb */
2887                 if ((ulong)capacity >= 0x200000) {
2888                         heads = 255;
2889                         sectors = 63;
2890                         cylinders = (ulong)capacity / (heads * sectors);
2891                 }
2892
2893                 /* return result */
2894                 geom[0] = heads;
2895                 geom[1] = sectors;
2896                 geom[2] = cylinders;
2897         }
2898
2899         return 0;
2900 }
2901
2902 /**
2903  * mega_init_scb()
2904  * @adapter - pointer to our soft state
2905  *
2906  * Allocate memory for the various pointers in the scb structures:
2907  * scatter-gather list pointer, passthru and extended passthru structure
2908  * pointers.
2909  */
2910 static int
2911 mega_init_scb(adapter_t *adapter)
2912 {
2913         scb_t   *scb;
2914         int     i;
2915
2916         for( i = 0; i < adapter->max_cmds; i++ ) {
2917
2918                 scb = &adapter->scb_list[i];
2919
2920                 scb->sgl64 = NULL;
2921                 scb->sgl = NULL;
2922                 scb->pthru = NULL;
2923                 scb->epthru = NULL;
2924         }
2925
2926         for( i = 0; i < adapter->max_cmds; i++ ) {
2927
2928                 scb = &adapter->scb_list[i];
2929
2930                 scb->idx = i;
2931
2932                 scb->sgl64 = pci_alloc_consistent(adapter->dev,
2933                                 sizeof(mega_sgl64) * adapter->sglen,
2934                                 &scb->sgl_dma_addr);
2935
2936                 scb->sgl = (mega_sglist *)scb->sgl64;
2937
2938                 if( !scb->sgl ) {
2939                         printk(KERN_WARNING "RAID: Can't allocate sglist.\n");
2940                         mega_free_sgl(adapter);
2941                         return -1;
2942                 }
2943
2944                 scb->pthru = pci_alloc_consistent(adapter->dev,
2945                                 sizeof(mega_passthru),
2946                                 &scb->pthru_dma_addr);
2947
2948                 if( !scb->pthru ) {
2949                         printk(KERN_WARNING "RAID: Can't allocate passthru.\n");
2950                         mega_free_sgl(adapter);
2951                         return -1;
2952                 }
2953
2954                 scb->epthru = pci_alloc_consistent(adapter->dev,
2955                                 sizeof(mega_ext_passthru),
2956                                 &scb->epthru_dma_addr);
2957
2958                 if( !scb->epthru ) {
2959                         printk(KERN_WARNING
2960                                 "Can't allocate extended passthru.\n");
2961                         mega_free_sgl(adapter);
2962                         return -1;
2963                 }
2964
2965
2966                 scb->dma_type = MEGA_DMA_TYPE_NONE;
2967
2968                 /*
2969                  * Link to free list
2970                  * lock not required since we are loading the driver, so no
2971                  * commands possible right now.
2972                  */
2973                 scb->state = SCB_FREE;
2974                 scb->cmd = NULL;
2975                 list_add(&scb->list, &adapter->free_list);
2976         }
2977
2978         return 0;
2979 }
2980
2981
2982 /**
2983  * megadev_open()
2984  * @inode - unused
2985  * @filep - unused
2986  *
2987  * Routines for the character/ioctl interface to the driver. Find out if this
2988  * is a valid open.
2989  */
2990 static int
2991 megadev_open (struct inode *inode, struct file *filep)
2992 {
2993         /*
2994          * Only allow superuser to access private ioctl interface
2995          */
2996         if( !capable(CAP_SYS_ADMIN) ) return -EACCES;
2997
2998         return 0;
2999 }
3000
3001
3002 /**
3003  * megadev_ioctl()
3004  * @inode - Our device inode
3005  * @filep - unused
3006  * @cmd - ioctl command
3007  * @arg - user buffer
3008  *
3009  * ioctl entry point for our private ioctl interface. We move the data in from
3010  * the user space, prepare the command (if necessary, convert the old MIMD
3011  * ioctl to new ioctl command), and issue a synchronous command to the
3012  * controller.
3013  */
3014 static int
3015 megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3016 {
3017         adapter_t       *adapter;
3018         nitioctl_t      uioc;
3019         int             adapno;
3020         int             rval;
3021         mega_passthru   __user *upthru; /* user address for passthru */
3022         mega_passthru   *pthru;         /* copy user passthru here */
3023         dma_addr_t      pthru_dma_hndl;
3024         void            *data = NULL;   /* data to be transferred */
3025         dma_addr_t      data_dma_hndl;  /* dma handle for data xfer area */
3026         megacmd_t       mc;
3027         megastat_t      __user *ustats;
3028         int             num_ldrv;
3029         u32             uxferaddr = 0;
3030         struct pci_dev  *pdev;
3031
3032         ustats = NULL; /* avoid compilation warnings */
3033         num_ldrv = 0;
3034
3035         /*
3036          * Make sure only USCSICMD are issued through this interface.
3037          * MIMD application would still fire different command.
3038          */
3039         if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
3040                 return -EINVAL;
3041         }
3042
3043         /*
3044          * Check and convert a possible MIMD command to NIT command.
3045          * mega_m_to_n() copies the data from the user space, so we do not
3046          * have to do it here.
3047          * NOTE: We will need some user address to copyout the data, therefore
3048          * the inteface layer will also provide us with the required user
3049          * addresses.
3050          */
3051         memset(&uioc, 0, sizeof(nitioctl_t));
3052         if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
3053                 return rval;
3054
3055
3056         switch( uioc.opcode ) {
3057
3058         case GET_DRIVER_VER:
3059                 if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
3060                         return (-EFAULT);
3061
3062                 break;
3063
3064         case GET_N_ADAP:
3065                 if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
3066                         return (-EFAULT);
3067
3068                 /*
3069                  * Shucks. MIMD interface returns a positive value for number
3070                  * of adapters. TODO: Change it to return 0 when there is no
3071                  * applicatio using mimd interface.
3072                  */
3073                 return hba_count;
3074
3075         case GET_ADAP_INFO:
3076
3077                 /*
3078                  * Which adapter
3079                  */
3080                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3081                         return (-ENODEV);
3082
3083                 if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
3084                                 sizeof(struct mcontroller)) )
3085                         return (-EFAULT);
3086                 break;
3087
3088 #if MEGA_HAVE_STATS
3089
3090         case GET_STATS:
3091                 /*
3092                  * Which adapter
3093                  */
3094                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3095                         return (-ENODEV);
3096
3097                 adapter = hba_soft_state[adapno];
3098
3099                 ustats = uioc.uioc_uaddr;
3100
3101                 if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
3102                         return (-EFAULT);
3103
3104                 /*
3105                  * Check for the validity of the logical drive number
3106                  */
3107                 if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
3108
3109                 if( copy_to_user(ustats->nreads, adapter->nreads,
3110                                         num_ldrv*sizeof(u32)) )
3111                         return -EFAULT;
3112
3113                 if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
3114                                         num_ldrv*sizeof(u32)) )
3115                         return -EFAULT;
3116
3117                 if( copy_to_user(ustats->nwrites, adapter->nwrites,
3118                                         num_ldrv*sizeof(u32)) )
3119                         return -EFAULT;
3120
3121                 if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
3122                                         num_ldrv*sizeof(u32)) )
3123                         return -EFAULT;
3124
3125                 if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
3126                                         num_ldrv*sizeof(u32)) )
3127                         return -EFAULT;
3128
3129                 if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
3130                                         num_ldrv*sizeof(u32)) )
3131                         return -EFAULT;
3132
3133                 return 0;
3134
3135 #endif
3136         case MBOX_CMD:
3137
3138                 /*
3139                  * Which adapter
3140                  */
3141                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3142                         return (-ENODEV);
3143
3144                 adapter = hba_soft_state[adapno];
3145
3146                 /*
3147                  * Deletion of logical drive is a special case. The adapter
3148                  * should be quiescent before this command is issued.
3149                  */
3150                 if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
3151                                 uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
3152
3153                         /*
3154                          * Do we support this feature
3155                          */
3156                         if( !adapter->support_random_del ) {
3157                                 printk(KERN_WARNING "megaraid: logdrv ");
3158                                 printk("delete on non-supporting F/W.\n");
3159
3160                                 return (-EINVAL);
3161                         }
3162
3163                         rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
3164
3165                         if( rval == 0 ) {
3166                                 memset(&mc, 0, sizeof(megacmd_t));
3167
3168                                 mc.status = rval;
3169
3170                                 rval = mega_n_to_m((void __user *)arg, &mc);
3171                         }
3172
3173                         return rval;
3174                 }
3175                 /*
3176                  * This interface only support the regular passthru commands.
3177                  * Reject extended passthru and 64-bit passthru
3178                  */
3179                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
3180                         uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
3181
3182                         printk(KERN_WARNING "megaraid: rejected passthru.\n");
3183
3184                         return (-EINVAL);
3185                 }
3186
3187                 /*
3188                  * For all internal commands, the buffer must be allocated in
3189                  * <4GB address range
3190                  */
3191                 if( make_local_pdev(adapter, &pdev) != 0 )
3192                         return -EIO;
3193
3194                 /* Is it a passthru command or a DCMD */
3195                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
3196                         /* Passthru commands */
3197
3198                         pthru = pci_alloc_consistent(pdev,
3199                                         sizeof(mega_passthru),
3200                                         &pthru_dma_hndl);
3201
3202                         if( pthru == NULL ) {
3203                                 free_local_pdev(pdev);
3204                                 return (-ENOMEM);
3205                         }
3206
3207                         /*
3208                          * The user passthru structure
3209                          */
3210                         upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr;
3211
3212                         /*
3213                          * Copy in the user passthru here.
3214                          */
3215                         if( copy_from_user(pthru, upthru,
3216                                                 sizeof(mega_passthru)) ) {
3217
3218                                 pci_free_consistent(pdev,
3219                                                 sizeof(mega_passthru), pthru,
3220                                                 pthru_dma_hndl);
3221
3222                                 free_local_pdev(pdev);
3223
3224                                 return (-EFAULT);
3225                         }
3226
3227                         /*
3228                          * Is there a data transfer
3229                          */
3230                         if( pthru->dataxferlen ) {
3231                                 data = pci_alloc_consistent(pdev,
3232                                                 pthru->dataxferlen,
3233                                                 &data_dma_hndl);
3234
3235                                 if( data == NULL ) {
3236                                         pci_free_consistent(pdev,
3237                                                         sizeof(mega_passthru),
3238                                                         pthru,
3239                                                         pthru_dma_hndl);
3240
3241                                         free_local_pdev(pdev);
3242
3243                                         return (-ENOMEM);
3244                                 }
3245
3246                                 /*
3247                                  * Save the user address and point the kernel
3248                                  * address at just allocated memory
3249                                  */
3250                                 uxferaddr = pthru->dataxferaddr;
3251                                 pthru->dataxferaddr = data_dma_hndl;
3252                         }
3253
3254
3255                         /*
3256                          * Is data coming down-stream
3257                          */
3258                         if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) {
3259                                 /*
3260                                  * Get the user data
3261                                  */
3262                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3263                                                         pthru->dataxferlen) ) {
3264                                         rval = (-EFAULT);
3265                                         goto freemem_and_return;
3266                                 }
3267                         }
3268
3269                         memset(&mc, 0, sizeof(megacmd_t));
3270
3271                         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
3272                         mc.xferaddr = (u32)pthru_dma_hndl;
3273
3274                         /*
3275                          * Issue the command
3276                          */
3277                         mega_internal_command(adapter, &mc, pthru);
3278
3279                         rval = mega_n_to_m((void __user *)arg, &mc);
3280
3281                         if( rval ) goto freemem_and_return;
3282
3283
3284                         /*
3285                          * Is data going up-stream
3286                          */
3287                         if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
3288                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3289                                                         pthru->dataxferlen) ) {
3290                                         rval = (-EFAULT);
3291                                 }
3292                         }
3293
3294                         /*
3295                          * Send the request sense data also, irrespective of
3296                          * whether the user has asked for it or not.
3297                          */
3298                         if (copy_to_user(upthru->reqsensearea,
3299                                         pthru->reqsensearea, 14))
3300                                 rval = -EFAULT;
3301
3302 freemem_and_return:
3303                         if( pthru->dataxferlen ) {
3304                                 pci_free_consistent(pdev,
3305                                                 pthru->dataxferlen, data,
3306                                                 data_dma_hndl);
3307                         }
3308
3309                         pci_free_consistent(pdev, sizeof(mega_passthru),
3310                                         pthru, pthru_dma_hndl);
3311
3312                         free_local_pdev(pdev);
3313
3314                         return rval;
3315                 }
3316                 else {
3317                         /* DCMD commands */
3318
3319                         /*
3320                          * Is there a data transfer
3321                          */
3322                         if( uioc.xferlen ) {
3323                                 data = pci_alloc_consistent(pdev,
3324                                                 uioc.xferlen, &data_dma_hndl);
3325
3326                                 if( data == NULL ) {
3327                                         free_local_pdev(pdev);
3328                                         return (-ENOMEM);
3329                                 }
3330
3331                                 uxferaddr = MBOX(uioc)->xferaddr;
3332                         }
3333
3334                         /*
3335                          * Is data coming down-stream
3336                          */
3337                         if( uioc.xferlen && (uioc.flags & UIOC_WR) ) {
3338                                 /*
3339                                  * Get the user data
3340                                  */
3341                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3342                                                         uioc.xferlen) ) {
3343
3344                                         pci_free_consistent(pdev,
3345                                                         uioc.xferlen,
3346                                                         data, data_dma_hndl);
3347
3348                                         free_local_pdev(pdev);
3349
3350                                         return (-EFAULT);
3351                                 }
3352                         }
3353
3354                         memcpy(&mc, MBOX(uioc), sizeof(megacmd_t));
3355
3356                         mc.xferaddr = (u32)data_dma_hndl;
3357
3358                         /*
3359                          * Issue the command
3360                          */
3361                         mega_internal_command(adapter, &mc, NULL);
3362
3363                         rval = mega_n_to_m((void __user *)arg, &mc);
3364
3365                         if( rval ) {
3366                                 if( uioc.xferlen ) {
3367                                         pci_free_consistent(pdev,
3368                                                         uioc.xferlen, data,
3369                                                         data_dma_hndl);
3370                                 }
3371
3372                                 free_local_pdev(pdev);
3373
3374                                 return rval;
3375                         }
3376
3377                         /*
3378                          * Is data going up-stream
3379                          */
3380                         if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
3381                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3382                                                         uioc.xferlen) ) {
3383
3384                                         rval = (-EFAULT);
3385                                 }
3386                         }
3387
3388                         if( uioc.xferlen ) {
3389                                 pci_free_consistent(pdev,
3390                                                 uioc.xferlen, data,
3391                                                 data_dma_hndl);
3392                         }
3393
3394                         free_local_pdev(pdev);
3395
3396                         return rval;
3397                 }
3398
3399         default:
3400                 return (-EINVAL);
3401         }
3402
3403         return 0;
3404 }
3405
3406 static long
3407 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3408 {
3409         int ret;
3410
3411         mutex_lock(&megadev_mutex);
3412         ret = megadev_ioctl(filep, cmd, arg);
3413         mutex_unlock(&megadev_mutex);
3414
3415         return ret;
3416 }
3417
3418 /**
3419  * mega_m_to_n()
3420  * @arg - user address
3421  * @uioc - new ioctl structure
3422  *
3423  * A thin layer to convert older mimd interface ioctl structure to NIT ioctl
3424  * structure
3425  *
3426  * Converts the older mimd ioctl structure to newer NIT structure
3427  */
3428 static int
3429 mega_m_to_n(void __user *arg, nitioctl_t *uioc)
3430 {
3431         struct uioctl_t uioc_mimd;
3432         char    signature[8] = {0};
3433         u8      opcode;
3434         u8      subopcode;
3435
3436
3437         /*
3438          * check is the application conforms to NIT. We do not have to do much
3439          * in that case.
3440          * We exploit the fact that the signature is stored in the very
3441          * beginning of the structure.
3442          */
3443
3444         if( copy_from_user(signature, arg, 7) )
3445                 return (-EFAULT);
3446
3447         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3448
3449                 /*
3450                  * NOTE NOTE: The nit ioctl is still under flux because of
3451                  * change of mailbox definition, in HPE. No applications yet
3452                  * use this interface and let's not have applications use this
3453                  * interface till the new specifitions are in place.
3454                  */
3455                 return -EINVAL;
3456 #if 0
3457                 if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
3458                         return (-EFAULT);
3459                 return 0;
3460 #endif
3461         }
3462
3463         /*
3464          * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
3465          *
3466          * Get the user ioctl structure
3467          */
3468         if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
3469                 return (-EFAULT);
3470
3471
3472         /*
3473          * Get the opcode and subopcode for the commands
3474          */
3475         opcode = uioc_mimd.ui.fcs.opcode;
3476         subopcode = uioc_mimd.ui.fcs.subopcode;
3477
3478         switch (opcode) {
3479         case 0x82:
3480
3481                 switch (subopcode) {
3482
3483                 case MEGAIOC_QDRVRVER:  /* Query driver version */
3484                         uioc->opcode = GET_DRIVER_VER;
3485                         uioc->uioc_uaddr = uioc_mimd.data;
3486                         break;
3487
3488                 case MEGAIOC_QNADAP:    /* Get # of adapters */
3489                         uioc->opcode = GET_N_ADAP;
3490                         uioc->uioc_uaddr = uioc_mimd.data;
3491                         break;
3492
3493                 case MEGAIOC_QADAPINFO: /* Get adapter information */
3494                         uioc->opcode = GET_ADAP_INFO;
3495                         uioc->adapno = uioc_mimd.ui.fcs.adapno;
3496                         uioc->uioc_uaddr = uioc_mimd.data;
3497                         break;
3498
3499                 default:
3500                         return(-EINVAL);
3501                 }
3502
3503                 break;
3504
3505
3506         case 0x81:
3507
3508                 uioc->opcode = MBOX_CMD;
3509                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3510
3511                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3512
3513                 uioc->xferlen = uioc_mimd.ui.fcs.length;
3514
3515                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3516                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3517
3518                 break;
3519
3520         case 0x80:
3521
3522                 uioc->opcode = MBOX_CMD;
3523                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3524
3525                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3526
3527                 /*
3528                  * Choose the xferlen bigger of input and output data
3529                  */
3530                 uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
3531                         uioc_mimd.outlen : uioc_mimd.inlen;
3532
3533                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3534                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3535
3536                 break;
3537
3538         default:
3539                 return (-EINVAL);
3540
3541         }
3542
3543         return 0;
3544 }
3545
3546 /*
3547  * mega_n_to_m()
3548  * @arg - user address
3549  * @mc - mailbox command
3550  *
3551  * Updates the status information to the application, depending on application
3552  * conforms to older mimd ioctl interface or newer NIT ioctl interface
3553  */
3554 static int
3555 mega_n_to_m(void __user *arg, megacmd_t *mc)
3556 {
3557         nitioctl_t      __user *uiocp;
3558         megacmd_t       __user *umc;
3559         mega_passthru   __user *upthru;
3560         struct uioctl_t __user *uioc_mimd;
3561         char    signature[8] = {0};
3562
3563         /*
3564          * check is the application conforms to NIT.
3565          */
3566         if( copy_from_user(signature, arg, 7) )
3567                 return -EFAULT;
3568
3569         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3570
3571                 uiocp = arg;
3572
3573                 if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
3574                         return (-EFAULT);
3575
3576                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3577
3578                         umc = MBOX_P(uiocp);
3579
3580                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3581                                 return -EFAULT;
3582
3583                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
3584                                 return (-EFAULT);
3585                 }
3586         }
3587         else {
3588                 uioc_mimd = arg;
3589
3590                 if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
3591                         return (-EFAULT);
3592
3593                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3594
3595                         umc = (megacmd_t __user *)uioc_mimd->mbox;
3596
3597                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3598                                 return (-EFAULT);
3599
3600                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
3601                                 return (-EFAULT);
3602                 }
3603         }
3604
3605         return 0;
3606 }
3607
3608
3609 /*
3610  * MEGARAID 'FW' commands.
3611  */
3612
3613 /**
3614  * mega_is_bios_enabled()
3615  * @adapter - pointer to our soft state
3616  *
3617  * issue command to find out if the BIOS is enabled for this controller
3618  */
3619 static int
3620 mega_is_bios_enabled(adapter_t *adapter)
3621 {
3622         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3623         mbox_t  *mbox;
3624         int     ret;
3625
3626         mbox = (mbox_t *)raw_mbox;
3627
3628         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3629
3630         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3631
3632         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3633
3634         raw_mbox[0] = IS_BIOS_ENABLED;
3635         raw_mbox[2] = GET_BIOS;
3636
3637
3638         ret = issue_scb_block(adapter, raw_mbox);
3639
3640         return *(char *)adapter->mega_buffer;
3641 }
3642
3643
3644 /**
3645  * mega_enum_raid_scsi()
3646  * @adapter - pointer to our soft state
3647  *
3648  * Find out what channels are RAID/SCSI. This information is used to
3649  * differentiate the virtual channels and physical channels and to support
3650  * ROMB feature and non-disk devices.
3651  */
3652 static void
3653 mega_enum_raid_scsi(adapter_t *adapter)
3654 {
3655         unsigned char raw_mbox[sizeof(struct mbox_out)];
3656         mbox_t *mbox;
3657         int i;
3658
3659         mbox = (mbox_t *)raw_mbox;
3660
3661         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3662
3663         /*
3664          * issue command to find out what channels are raid/scsi
3665          */
3666         raw_mbox[0] = CHNL_CLASS;
3667         raw_mbox[2] = GET_CHNL_CLASS;
3668
3669         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3670
3671         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3672
3673         /*
3674          * Non-ROMB firmware fail this command, so all channels
3675          * must be shown RAID
3676          */
3677         adapter->mega_ch_class = 0xFF;
3678
3679         if(!issue_scb_block(adapter, raw_mbox)) {
3680                 adapter->mega_ch_class = *((char *)adapter->mega_buffer);
3681
3682         }
3683
3684         for( i = 0; i < adapter->product_info.nchannels; i++ ) {
3685                 if( (adapter->mega_ch_class >> i) & 0x01 ) {
3686                         printk(KERN_INFO "megaraid: channel[%d] is raid.\n",
3687                                         i);
3688                 }
3689                 else {
3690                         printk(KERN_INFO "megaraid: channel[%d] is scsi.\n",
3691                                         i);
3692                 }
3693         }
3694
3695         return;
3696 }
3697
3698
3699 /**
3700  * mega_get_boot_drv()
3701  * @adapter - pointer to our soft state
3702  *
3703  * Find out which device is the boot device. Note, any logical drive or any
3704  * phyical device (e.g., a CDROM) can be designated as a boot device.
3705  */
3706 static void
3707 mega_get_boot_drv(adapter_t *adapter)
3708 {
3709         struct private_bios_data        *prv_bios_data;
3710         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3711         mbox_t  *mbox;
3712         u16     cksum = 0;
3713         u8      *cksum_p;
3714         u8      boot_pdrv;
3715         int     i;
3716
3717         mbox = (mbox_t *)raw_mbox;
3718
3719         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3720
3721         raw_mbox[0] = BIOS_PVT_DATA;
3722         raw_mbox[2] = GET_BIOS_PVT_DATA;
3723
3724         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3725
3726         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3727
3728         adapter->boot_ldrv_enabled = 0;
3729         adapter->boot_ldrv = 0;
3730
3731         adapter->boot_pdrv_enabled = 0;
3732         adapter->boot_pdrv_ch = 0;
3733         adapter->boot_pdrv_tgt = 0;
3734
3735         if(issue_scb_block(adapter, raw_mbox) == 0) {
3736                 prv_bios_data =
3737                         (struct private_bios_data *)adapter->mega_buffer;
3738
3739                 cksum = 0;
3740                 cksum_p = (char *)prv_bios_data;
3741                 for (i = 0; i < 14; i++ ) {
3742                         cksum += (u16)(*cksum_p++);
3743                 }
3744
3745                 if (prv_bios_data->cksum == (u16)(0-cksum) ) {
3746
3747                         /*
3748                          * If MSB is set, a physical drive is set as boot
3749                          * device
3750                          */
3751                         if( prv_bios_data->boot_drv & 0x80 ) {
3752                                 adapter->boot_pdrv_enabled = 1;
3753                                 boot_pdrv = prv_bios_data->boot_drv & 0x7F;
3754                                 adapter->boot_pdrv_ch = boot_pdrv / 16;
3755                                 adapter->boot_pdrv_tgt = boot_pdrv % 16;
3756                         }
3757                         else {
3758                                 adapter->boot_ldrv_enabled = 1;
3759                                 adapter->boot_ldrv = prv_bios_data->boot_drv;
3760                         }
3761                 }
3762         }
3763
3764 }
3765
3766 /**
3767  * mega_support_random_del()
3768  * @adapter - pointer to our soft state
3769  *
3770  * Find out if this controller supports random deletion and addition of
3771  * logical drives
3772  */
3773 static int
3774 mega_support_random_del(adapter_t *adapter)
3775 {
3776         unsigned char raw_mbox[sizeof(struct mbox_out)];
3777         mbox_t *mbox;
3778         int rval;
3779
3780         mbox = (mbox_t *)raw_mbox;
3781
3782         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3783
3784         /*
3785          * issue command
3786          */
3787         raw_mbox[0] = FC_DEL_LOGDRV;
3788         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3789
3790         rval = issue_scb_block(adapter, raw_mbox);
3791
3792         return !rval;
3793 }
3794
3795
3796 /**
3797  * mega_support_ext_cdb()
3798  * @adapter - pointer to our soft state
3799  *
3800  * Find out if this firmware support cdblen > 10
3801  */
3802 static int
3803 mega_support_ext_cdb(adapter_t *adapter)
3804 {
3805         unsigned char raw_mbox[sizeof(struct mbox_out)];
3806         mbox_t *mbox;
3807         int rval;
3808
3809         mbox = (mbox_t *)raw_mbox;
3810
3811         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3812         /*
3813          * issue command to find out if controller supports extended CDBs.
3814          */
3815         raw_mbox[0] = 0xA4;
3816         raw_mbox[2] = 0x16;
3817
3818         rval = issue_scb_block(adapter, raw_mbox);
3819
3820         return !rval;
3821 }
3822
3823
3824 /**
3825  * mega_del_logdrv()
3826  * @adapter - pointer to our soft state
3827  * @logdrv - logical drive to be deleted
3828  *
3829  * Delete the specified logical drive. It is the responsibility of the user
3830  * app to let the OS know about this operation.
3831  */
3832 static int
3833 mega_del_logdrv(adapter_t *adapter, int logdrv)
3834 {
3835         unsigned long flags;
3836         scb_t *scb;
3837         int rval;
3838
3839         /*
3840          * Stop sending commands to the controller, queue them internally.
3841          * When deletion is complete, ISR will flush the queue.
3842          */
3843         atomic_set(&adapter->quiescent, 1);
3844
3845         /*
3846          * Wait till all the issued commands are complete and there are no
3847          * commands in the pending queue
3848          */
3849         while (atomic_read(&adapter->pend_cmds) > 0 ||
3850                !list_empty(&adapter->pending_list))
3851                 msleep(1000);   /* sleep for 1s */
3852
3853         rval = mega_do_del_logdrv(adapter, logdrv);
3854
3855         spin_lock_irqsave(&adapter->lock, flags);
3856
3857         /*
3858          * If delete operation was successful, add 0x80 to the logical drive
3859          * ids for commands in the pending queue.
3860          */
3861         if (adapter->read_ldidmap) {
3862                 struct list_head *pos;
3863                 list_for_each(pos, &adapter->pending_list) {
3864                         scb = list_entry(pos, scb_t, list);
3865                         if (scb->pthru->logdrv < 0x80 )
3866                                 scb->pthru->logdrv += 0x80;
3867                 }
3868         }
3869
3870         atomic_set(&adapter->quiescent, 0);
3871
3872         mega_runpendq(adapter);
3873
3874         spin_unlock_irqrestore(&adapter->lock, flags);
3875
3876         return rval;
3877 }
3878
3879
3880 static int
3881 mega_do_del_logdrv(adapter_t *adapter, int logdrv)
3882 {
3883         megacmd_t       mc;
3884         int     rval;
3885
3886         memset( &mc, 0, sizeof(megacmd_t));
3887
3888         mc.cmd = FC_DEL_LOGDRV;
3889         mc.opcode = OP_DEL_LOGDRV;
3890         mc.subopcode = logdrv;
3891
3892         rval = mega_internal_command(adapter, &mc, NULL);
3893
3894         /* log this event */
3895         if(rval) {
3896                 printk(KERN_WARNING "megaraid: Delete LD-%d failed.", logdrv);
3897                 return rval;
3898         }
3899
3900         /*
3901          * After deleting first logical drive, the logical drives must be
3902          * addressed by adding 0x80 to the logical drive id.
3903          */
3904         adapter->read_ldidmap = 1;
3905
3906         return rval;
3907 }
3908
3909
3910 /**
3911  * mega_get_max_sgl()
3912  * @adapter - pointer to our soft state
3913  *
3914  * Find out the maximum number of scatter-gather elements supported by this
3915  * version of the firmware
3916  */
3917 static void
3918 mega_get_max_sgl(adapter_t *adapter)
3919 {
3920         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3921         mbox_t  *mbox;
3922
3923         mbox = (mbox_t *)raw_mbox;
3924
3925         memset(mbox, 0, sizeof(raw_mbox));
3926
3927         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3928
3929         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3930
3931         raw_mbox[0] = MAIN_MISC_OPCODE;
3932         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3933
3934
3935         if( issue_scb_block(adapter, raw_mbox) ) {
3936                 /*
3937                  * f/w does not support this command. Choose the default value
3938                  */
3939                 adapter->sglen = MIN_SGLIST;
3940         }
3941         else {
3942                 adapter->sglen = *((char *)adapter->mega_buffer);
3943
3944                 /*
3945                  * Make sure this is not more than the resources we are
3946                  * planning to allocate
3947                  */
3948                 if ( adapter->sglen > MAX_SGLIST )
3949                         adapter->sglen = MAX_SGLIST;
3950         }
3951
3952         return;
3953 }
3954
3955
3956 /**
3957  * mega_support_cluster()
3958  * @adapter - pointer to our soft state
3959  *
3960  * Find out if this firmware support cluster calls.
3961  */
3962 static int
3963 mega_support_cluster(adapter_t *adapter)
3964 {
3965         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3966         mbox_t  *mbox;
3967
3968         mbox = (mbox_t *)raw_mbox;
3969
3970         memset(mbox, 0, sizeof(raw_mbox));
3971
3972         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3973
3974         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3975
3976         /*
3977          * Try to get the initiator id. This command will succeed iff the
3978          * clustering is available on this HBA.
3979          */
3980         raw_mbox[0] = MEGA_GET_TARGET_ID;
3981
3982         if( issue_scb_block(adapter, raw_mbox) == 0 ) {
3983
3984                 /*
3985                  * Cluster support available. Get the initiator target id.
3986                  * Tell our id to mid-layer too.
3987                  */
3988                 adapter->this_id = *(u32 *)adapter->mega_buffer;
3989                 adapter->host->this_id = adapter->this_id;
3990
3991                 return 1;
3992         }
3993
3994         return 0;
3995 }
3996
3997 #ifdef CONFIG_PROC_FS
3998 /**
3999  * mega_adapinq()
4000  * @adapter - pointer to our soft state
4001  * @dma_handle - DMA address of the buffer
4002  *
4003  * Issue internal commands while interrupts are available.
4004  * We only issue direct mailbox commands from within the driver. ioctl()
4005  * interface using these routines can issue passthru commands.
4006  */
4007 static int
4008 mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle)
4009 {
4010         megacmd_t       mc;
4011
4012         memset(&mc, 0, sizeof(megacmd_t));
4013
4014         if( adapter->flag & BOARD_40LD ) {
4015                 mc.cmd = FC_NEW_CONFIG;
4016                 mc.opcode = NC_SUBOP_ENQUIRY3;
4017                 mc.subopcode = ENQ3_GET_SOLICITED_FULL;
4018         }
4019         else {
4020                 mc.cmd = MEGA_MBOXCMD_ADPEXTINQ;
4021         }
4022
4023         mc.xferaddr = (u32)dma_handle;
4024
4025         if ( mega_internal_command(adapter, &mc, NULL) != 0 ) {
4026                 return -1;
4027         }
4028
4029         return 0;
4030 }
4031
4032
4033 /** mega_internal_dev_inquiry()
4034  * @adapter - pointer to our soft state
4035  * @ch - channel for this device
4036  * @tgt - ID of this device
4037  * @buf_dma_handle - DMA address of the buffer
4038  *
4039  * Issue the scsi inquiry for the specified device.
4040  */
4041 static int
4042 mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt,
4043                 dma_addr_t buf_dma_handle)
4044 {
4045         mega_passthru   *pthru;
4046         dma_addr_t      pthru_dma_handle;
4047         megacmd_t       mc;
4048         int             rval;
4049         struct pci_dev  *pdev;
4050
4051
4052         /*
4053          * For all internal commands, the buffer must be allocated in <4GB
4054          * address range
4055          */
4056         if( make_local_pdev(adapter, &pdev) != 0 ) return -1;
4057
4058         pthru = pci_alloc_consistent(pdev, sizeof(mega_passthru),
4059                         &pthru_dma_handle);
4060
4061         if( pthru == NULL ) {
4062                 free_local_pdev(pdev);
4063                 return -1;
4064         }
4065
4066         pthru->timeout = 2;
4067         pthru->ars = 1;
4068         pthru->reqsenselen = 14;
4069         pthru->islogical = 0;
4070
4071         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch;
4072
4073         pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt;
4074
4075         pthru->cdblen = 6;
4076
4077         pthru->cdb[0] = INQUIRY;
4078         pthru->cdb[1] = 0;
4079         pthru->cdb[2] = 0;
4080         pthru->cdb[3] = 0;
4081         pthru->cdb[4] = 255;
4082         pthru->cdb[5] = 0;
4083
4084
4085         pthru->dataxferaddr = (u32)buf_dma_handle;
4086         pthru->dataxferlen = 256;
4087
4088         memset(&mc, 0, sizeof(megacmd_t));
4089
4090         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
4091         mc.xferaddr = (u32)pthru_dma_handle;
4092
4093         rval = mega_internal_command(adapter, &mc, pthru);
4094
4095         pci_free_consistent(pdev, sizeof(mega_passthru), pthru,
4096                         pthru_dma_handle);
4097
4098         free_local_pdev(pdev);
4099
4100         return rval;
4101 }
4102 #endif
4103
4104 /**
4105  * mega_internal_command()
4106  * @adapter - pointer to our soft state
4107  * @mc - the mailbox command
4108  * @pthru - Passthru structure for DCDB commands
4109  *
4110  * Issue the internal commands in interrupt mode.
4111  * The last argument is the address of the passthru structure if the command
4112  * to be fired is a passthru command
4113  *
4114  * Note: parameter 'pthru' is null for non-passthru commands.
4115  */
4116 static int
4117 mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
4118 {
4119         unsigned long flags;
4120         scb_t   *scb;
4121         int     rval;
4122
4123         /*
4124          * The internal commands share one command id and hence are
4125          * serialized. This is so because we want to reserve maximum number of
4126          * available command ids for the I/O commands.
4127          */
4128         mutex_lock(&adapter->int_mtx);
4129
4130         scb = &adapter->int_scb;
4131         memset(scb, 0, sizeof(scb_t));
4132
4133         scb->idx = CMDID_INT_CMDS;
4134         scb->state |= SCB_ACTIVE | SCB_PENDQ;
4135
4136         memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
4137
4138         /*
4139          * Is it a passthru command
4140          */
4141         if (mc->cmd == MEGA_MBOXCMD_PASSTHRU)
4142                 scb->pthru = pthru;
4143
4144         spin_lock_irqsave(&adapter->lock, flags);
4145         list_add_tail(&scb->list, &adapter->pending_list);
4146         /*
4147          * Check if the HBA is in quiescent state, e.g., during a
4148          * delete logical drive opertion. If it is, don't run
4149          * the pending_list.
4150          */
4151         if (atomic_read(&adapter->quiescent) == 0)
4152                 mega_runpendq(adapter);
4153         spin_unlock_irqrestore(&adapter->lock, flags);
4154
4155         wait_for_completion(&adapter->int_waitq);
4156
4157         mc->status = rval = adapter->int_status;
4158
4159         /*
4160          * Print a debug message for all failed commands. Applications can use
4161          * this information.
4162          */
4163         if (rval && trace_level) {
4164                 printk("megaraid: cmd [%x, %x, %x] status:[%x]\n",
4165                         mc->cmd, mc->opcode, mc->subopcode, rval);
4166         }
4167
4168         mutex_unlock(&adapter->int_mtx);
4169         return rval;
4170 }
4171
4172 static struct scsi_host_template megaraid_template = {
4173         .module                         = THIS_MODULE,
4174         .name                           = "MegaRAID",
4175         .proc_name                      = "megaraid_legacy",
4176         .info                           = megaraid_info,
4177         .queuecommand                   = megaraid_queue,
4178         .bios_param                     = megaraid_biosparam,
4179         .max_sectors                    = MAX_SECTORS_PER_IO,
4180         .can_queue                      = MAX_COMMANDS,
4181         .this_id                        = DEFAULT_INITIATOR_ID,
4182         .sg_tablesize                   = MAX_SGLIST,
4183         .cmd_per_lun                    = DEF_CMD_PER_LUN,
4184         .use_clustering                 = ENABLE_CLUSTERING,
4185         .eh_abort_handler               = megaraid_abort,
4186         .eh_device_reset_handler        = megaraid_reset,
4187         .eh_bus_reset_handler           = megaraid_reset,
4188         .eh_host_reset_handler          = megaraid_reset,
4189         .no_write_same                  = 1,
4190 };
4191
4192 static int
4193 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
4194 {
4195         struct Scsi_Host *host;
4196         adapter_t *adapter;
4197         unsigned long mega_baseport, tbase, flag = 0;
4198         u16 subsysid, subsysvid;
4199         u8 pci_bus, pci_dev_func;
4200         int irq, i, j;
4201         int error = -ENODEV;
4202
4203         if (pci_enable_device(pdev))
4204                 goto out;
4205         pci_set_master(pdev);
4206
4207         pci_bus = pdev->bus->number;
4208         pci_dev_func = pdev->devfn;
4209
4210         /*
4211          * The megaraid3 stuff reports the ID of the Intel part which is not
4212          * remotely specific to the megaraid
4213          */
4214         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
4215                 u16 magic;
4216                 /*
4217                  * Don't fall over the Compaq management cards using the same
4218                  * PCI identifier
4219                  */
4220                 if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
4221                     pdev->subsystem_device == 0xC000)
4222                         return -ENODEV;
4223                 /* Now check the magic signature byte */
4224                 pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
4225                 if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
4226                         return -ENODEV;
4227                 /* Ok it is probably a megaraid */
4228         }
4229
4230         /*
4231          * For these vendor and device ids, signature offsets are not
4232          * valid and 64 bit is implicit
4233          */
4234         if (id->driver_data & BOARD_64BIT)
4235                 flag |= BOARD_64BIT;
4236         else {
4237                 u32 magic64;
4238
4239                 pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
4240                 if (magic64 == HBA_SIGNATURE_64BIT)
4241                         flag |= BOARD_64BIT;
4242         }
4243
4244         subsysvid = pdev->subsystem_vendor;
4245         subsysid = pdev->subsystem_device;
4246
4247         printk(KERN_NOTICE "megaraid: found 0x%4.04x:0x%4.04x:bus %d:",
4248                 id->vendor, id->device, pci_bus);
4249
4250         printk("slot %d:func %d\n",
4251                 PCI_SLOT(pci_dev_func), PCI_FUNC(pci_dev_func));
4252
4253         /* Read the base port and IRQ from PCI */
4254         mega_baseport = pci_resource_start(pdev, 0);
4255         irq = pdev->irq;
4256
4257         tbase = mega_baseport;
4258         if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
4259                 flag |= BOARD_MEMMAP;
4260
4261                 if (!request_mem_region(mega_baseport, 128, "megaraid")) {
4262                         printk(KERN_WARNING "megaraid: mem region busy!\n");
4263                         goto out_disable_device;
4264                 }
4265
4266                 mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
4267                 if (!mega_baseport) {
4268                         printk(KERN_WARNING
4269                                "megaraid: could not map hba memory\n");
4270                         goto out_release_region;
4271                 }
4272         } else {
4273                 flag |= BOARD_IOMAP;
4274                 mega_baseport += 0x10;
4275
4276                 if (!request_region(mega_baseport, 16, "megaraid"))
4277                         goto out_disable_device;
4278         }
4279
4280         /* Initialize SCSI Host structure */
4281         host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
4282         if (!host)
4283                 goto out_iounmap;
4284
4285         adapter = (adapter_t *)host->hostdata;
4286         memset(adapter, 0, sizeof(adapter_t));
4287
4288         printk(KERN_NOTICE
4289                 "scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
4290                 host->host_no, mega_baseport, irq);
4291
4292         adapter->base = mega_baseport;
4293         if (flag & BOARD_MEMMAP)
4294                 adapter->mmio_base = (void __iomem *) mega_baseport;
4295
4296         INIT_LIST_HEAD(&adapter->free_list);
4297         INIT_LIST_HEAD(&adapter->pending_list);
4298         INIT_LIST_HEAD(&adapter->completed_list);
4299
4300         adapter->flag = flag;
4301         spin_lock_init(&adapter->lock);
4302
4303         host->cmd_per_lun = max_cmd_per_lun;
4304         host->max_sectors = max_sectors_per_io;
4305
4306         adapter->dev = pdev;
4307         adapter->host = host;
4308
4309         adapter->host->irq = irq;
4310
4311         if (flag & BOARD_MEMMAP)
4312                 adapter->host->base = tbase;
4313         else {
4314                 adapter->host->io_port = tbase;
4315                 adapter->host->n_io_port = 16;
4316         }
4317
4318         adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;
4319
4320         /*
4321          * Allocate buffer to issue internal commands.
4322          */
4323         adapter->mega_buffer = pci_alloc_consistent(adapter->dev,
4324                 MEGA_BUFFER_SIZE, &adapter->buf_dma_handle);
4325         if (!adapter->mega_buffer) {
4326                 printk(KERN_WARNING "megaraid: out of RAM.\n");
4327                 goto out_host_put;
4328         }
4329
4330         adapter->scb_list = kmalloc(sizeof(scb_t) * MAX_COMMANDS, GFP_KERNEL);
4331         if (!adapter->scb_list) {
4332                 printk(KERN_WARNING "megaraid: out of RAM.\n");
4333                 goto out_free_cmd_buffer;
4334         }
4335
4336         if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
4337                                 megaraid_isr_memmapped : megaraid_isr_iomapped,
4338                                         IRQF_SHARED, "megaraid", adapter)) {
4339                 printk(KERN_WARNING
4340                         "megaraid: Couldn't register IRQ %d!\n", irq);
4341                 goto out_free_scb_list;
4342         }
4343
4344         if (mega_setup_mailbox(adapter))
4345                 goto out_free_irq;
4346
4347         if (mega_query_adapter(adapter))
4348                 goto out_free_mbox;
4349
4350         /*
4351          * Have checks for some buggy f/w
4352          */
4353         if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
4354                 /*
4355                  * Which firmware
4356                  */
4357                 if (!strcmp(adapter->fw_version, "3.00") ||
4358                                 !strcmp(adapter->fw_version, "3.01")) {
4359
4360                         printk( KERN_WARNING
4361                                 "megaraid: Your  card is a Dell PERC "
4362                                 "2/SC RAID controller with  "
4363                                 "firmware\nmegaraid: 3.00 or 3.01.  "
4364                                 "This driver is known to have "
4365                                 "corruption issues\nmegaraid: with "
4366                                 "those firmware versions on this "
4367                                 "specific card.  In order\nmegaraid: "
4368                                 "to protect your data, please upgrade "
4369                                 "your firmware to version\nmegaraid: "
4370                                 "3.10 or later, available from the "
4371                                 "Dell Technical Support web\n"
4372                                 "megaraid: site at\nhttp://support."
4373                                 "dell.com/us/en/filelib/download/"
4374                                 "index.asp?fileid=2940\n"
4375                         );
4376                 }
4377         }
4378
4379         /*
4380          * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
4381          * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
4382          * support, since this firmware cannot handle 64 bit
4383          * addressing
4384          */
4385         if ((subsysvid == PCI_VENDOR_ID_HP) &&
4386             ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
4387                 /*
4388                  * which firmware
4389                  */
4390                 if (!strcmp(adapter->fw_version, "H01.07") ||
4391                     !strcmp(adapter->fw_version, "H01.08") ||
4392                     !strcmp(adapter->fw_version, "H01.09") ) {
4393                         printk(KERN_WARNING
4394                                 "megaraid: Firmware H.01.07, "
4395                                 "H.01.08, and H.01.09 on 1M/2M "
4396                                 "controllers\n"
4397                                 "megaraid: do not support 64 bit "
4398                                 "addressing.\nmegaraid: DISABLING "
4399                                 "64 bit support.\n");
4400                         adapter->flag &= ~BOARD_64BIT;
4401                 }
4402         }
4403
4404         if (mega_is_bios_enabled(adapter))
4405                 mega_hbas[hba_count].is_bios_enabled = 1;
4406         mega_hbas[hba_count].hostdata_addr = adapter;
4407
4408         /*
4409          * Find out which channel is raid and which is scsi. This is
4410          * for ROMB support.
4411          */
4412         mega_enum_raid_scsi(adapter);
4413
4414         /*
4415          * Find out if a logical drive is set as the boot drive. If
4416          * there is one, will make that as the first logical drive.
4417          * ROMB: Do we have to boot from a physical drive. Then all
4418          * the physical drives would appear before the logical disks.
4419          * Else, all the physical drives would be exported to the mid
4420          * layer after logical drives.
4421          */
4422         mega_get_boot_drv(adapter);
4423
4424         if (adapter->boot_pdrv_enabled) {
4425                 j = adapter->product_info.nchannels;
4426                 for( i = 0; i < j; i++ )
4427                         adapter->logdrv_chan[i] = 0;
4428                 for( i = j; i < NVIRT_CHAN + j; i++ )
4429                         adapter->logdrv_chan[i] = 1;
4430         } else {
4431                 for (i = 0; i < NVIRT_CHAN; i++)
4432                         adapter->logdrv_chan[i] = 1;
4433                 for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
4434                         adapter->logdrv_chan[i] = 0;
4435                 adapter->mega_ch_class <<= NVIRT_CHAN;
4436         }
4437
4438         /*
4439          * Do we support random deletion and addition of logical
4440          * drives
4441          */
4442         adapter->read_ldidmap = 0;      /* set it after first logdrv
4443                                                    delete cmd */
4444         adapter->support_random_del = mega_support_random_del(adapter);
4445
4446         /* Initialize SCBs */
4447         if (mega_init_scb(adapter))
4448                 goto out_free_mbox;
4449
4450         /*
4451          * Reset the pending commands counter
4452          */
4453         atomic_set(&adapter->pend_cmds, 0);
4454
4455         /*
4456          * Reset the adapter quiescent flag
4457          */
4458         atomic_set(&adapter->quiescent, 0);
4459
4460         hba_soft_state[hba_count] = adapter;
4461
4462         /*
4463          * Fill in the structure which needs to be passed back to the
4464          * application when it does an ioctl() for controller related
4465          * information.
4466          */
4467         i = hba_count;
4468
4469         mcontroller[i].base = mega_baseport;
4470         mcontroller[i].irq = irq;
4471         mcontroller[i].numldrv = adapter->numldrv;
4472         mcontroller[i].pcibus = pci_bus;
4473         mcontroller[i].pcidev = id->device;
4474         mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
4475         mcontroller[i].pciid = -1;
4476         mcontroller[i].pcivendor = id->vendor;
4477         mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
4478         mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;
4479
4480
4481         /* Set the Mode of addressing to 64 bit if we can */
4482         if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
4483                 pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4484                 adapter->has_64bit_addr = 1;
4485         } else  {
4486                 pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4487                 adapter->has_64bit_addr = 0;
4488         }
4489
4490         mutex_init(&adapter->int_mtx);
4491         init_completion(&adapter->int_waitq);
4492
4493         adapter->this_id = DEFAULT_INITIATOR_ID;
4494         adapter->host->this_id = DEFAULT_INITIATOR_ID;
4495
4496 #if MEGA_HAVE_CLUSTERING
4497         /*
4498          * Is cluster support enabled on this controller
4499          * Note: In a cluster the HBAs ( the initiators ) will have
4500          * different target IDs and we cannot assume it to be 7. Call
4501          * to mega_support_cluster() will get the target ids also if
4502          * the cluster support is available
4503          */
4504         adapter->has_cluster = mega_support_cluster(adapter);
4505         if (adapter->has_cluster) {
4506                 printk(KERN_NOTICE
4507                         "megaraid: Cluster driver, initiator id:%d\n",
4508                         adapter->this_id);
4509         }
4510 #endif
4511
4512         pci_set_drvdata(pdev, host);
4513
4514         mega_create_proc_entry(hba_count, mega_proc_dir_entry);
4515
4516         error = scsi_add_host(host, &pdev->dev);
4517         if (error)
4518                 goto out_free_mbox;
4519
4520         scsi_scan_host(host);
4521         hba_count++;
4522         return 0;
4523
4524  out_free_mbox:
4525         pci_free_consistent(adapter->dev, sizeof(mbox64_t),
4526                         adapter->una_mbox64, adapter->una_mbox64_dma);
4527  out_free_irq:
4528         free_irq(adapter->host->irq, adapter);
4529  out_free_scb_list:
4530         kfree(adapter->scb_list);
4531  out_free_cmd_buffer:
4532         pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
4533                         adapter->mega_buffer, adapter->buf_dma_handle);
4534  out_host_put:
4535         scsi_host_put(host);
4536  out_iounmap:
4537         if (flag & BOARD_MEMMAP)
4538                 iounmap((void *)mega_baseport);
4539  out_release_region:
4540         if (flag & BOARD_MEMMAP)
4541                 release_mem_region(tbase, 128);
4542         else
4543                 release_region(mega_baseport, 16);
4544  out_disable_device:
4545         pci_disable_device(pdev);
4546  out:
4547         return error;
4548 }
4549
4550 static void
4551 __megaraid_shutdown(adapter_t *adapter)
4552 {
4553         u_char  raw_mbox[sizeof(struct mbox_out)];
4554         mbox_t  *mbox = (mbox_t *)raw_mbox;
4555         int     i;
4556
4557         /* Flush adapter cache */
4558         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4559         raw_mbox[0] = FLUSH_ADAPTER;
4560
4561         free_irq(adapter->host->irq, adapter);
4562
4563         /* Issue a blocking (interrupts disabled) command to the card */
4564         issue_scb_block(adapter, raw_mbox);
4565
4566         /* Flush disks cache */
4567         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4568         raw_mbox[0] = FLUSH_SYSTEM;
4569
4570         /* Issue a blocking (interrupts disabled) command to the card */
4571         issue_scb_block(adapter, raw_mbox);
4572
4573         if (atomic_read(&adapter->pend_cmds) > 0)
4574                 printk(KERN_WARNING "megaraid: pending commands!!\n");
4575
4576         /*
4577          * Have a delibrate delay to make sure all the caches are
4578          * actually flushed.
4579          */
4580         for (i = 0; i <= 10; i++)
4581                 mdelay(1000);
4582 }
4583
4584 static void
4585 megaraid_remove_one(struct pci_dev *pdev)
4586 {
4587         struct Scsi_Host *host = pci_get_drvdata(pdev);
4588         adapter_t *adapter = (adapter_t *)host->hostdata;
4589
4590         scsi_remove_host(host);
4591
4592         __megaraid_shutdown(adapter);
4593
4594         /* Free our resources */
4595         if (adapter->flag & BOARD_MEMMAP) {
4596                 iounmap((void *)adapter->base);
4597                 release_mem_region(adapter->host->base, 128);
4598         } else
4599                 release_region(adapter->base, 16);
4600
4601         mega_free_sgl(adapter);
4602
4603 #ifdef CONFIG_PROC_FS
4604         if (adapter->controller_proc_dir_entry) {
4605                 remove_proc_entry("stat", adapter->controller_proc_dir_entry);
4606                 remove_proc_entry("config",
4607                                 adapter->controller_proc_dir_entry);
4608                 remove_proc_entry("mailbox",
4609                                 adapter->controller_proc_dir_entry);
4610 #if MEGA_HAVE_ENH_PROC
4611                 remove_proc_entry("rebuild-rate",
4612                                 adapter->controller_proc_dir_entry);
4613                 remove_proc_entry("battery-status",
4614                                 adapter->controller_proc_dir_entry);
4615
4616                 remove_proc_entry("diskdrives-ch0",
4617                                 adapter->controller_proc_dir_entry);
4618                 remove_proc_entry("diskdrives-ch1",
4619                                 adapter->controller_proc_dir_entry);
4620                 remove_proc_entry("diskdrives-ch2",
4621                                 adapter->controller_proc_dir_entry);
4622                 remove_proc_entry("diskdrives-ch3",
4623                                 adapter->controller_proc_dir_entry);
4624
4625                 remove_proc_entry("raiddrives-0-9",
4626                                 adapter->controller_proc_dir_entry);
4627                 remove_proc_entry("raiddrives-10-19",
4628                                 adapter->controller_proc_dir_entry);
4629                 remove_proc_entry("raiddrives-20-29",
4630                                 adapter->controller_proc_dir_entry);
4631                 remove_proc_entry("raiddrives-30-39",
4632                                 adapter->controller_proc_dir_entry);
4633 #endif
4634                 {
4635                         char    buf[12] = { 0 };
4636                         sprintf(buf, "hba%d", adapter->host->host_no);
4637                         remove_proc_entry(buf, mega_proc_dir_entry);
4638                 }
4639         }
4640 #endif
4641
4642         pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
4643                         adapter->mega_buffer, adapter->buf_dma_handle);
4644         kfree(adapter->scb_list);
4645         pci_free_consistent(adapter->dev, sizeof(mbox64_t),
4646                         adapter->una_mbox64, adapter->una_mbox64_dma);
4647
4648         scsi_host_put(host);
4649         pci_disable_device(pdev);
4650
4651         hba_count--;
4652 }
4653
4654 static void
4655 megaraid_shutdown(struct pci_dev *pdev)
4656 {
4657         struct Scsi_Host *host = pci_get_drvdata(pdev);
4658         adapter_t *adapter = (adapter_t *)host->hostdata;
4659
4660         __megaraid_shutdown(adapter);
4661 }
4662
4663 static struct pci_device_id megaraid_pci_tbl[] = {
4664         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID,
4665                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4666         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2,
4667                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4668         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3,
4669                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4670         {0,}
4671 };
4672 MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl);
4673
4674 static struct pci_driver megaraid_pci_driver = {
4675         .name           = "megaraid_legacy",
4676         .id_table       = megaraid_pci_tbl,
4677         .probe          = megaraid_probe_one,
4678         .remove         = megaraid_remove_one,
4679         .shutdown       = megaraid_shutdown,
4680 };
4681
4682 static int __init megaraid_init(void)
4683 {
4684         int error;
4685
4686         if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN))
4687                 max_cmd_per_lun = MAX_CMD_PER_LUN;
4688         if (max_mbox_busy_wait > MBOX_BUSY_WAIT)
4689                 max_mbox_busy_wait = MBOX_BUSY_WAIT;
4690
4691 #ifdef CONFIG_PROC_FS
4692         mega_proc_dir_entry = proc_mkdir("megaraid", NULL);
4693         if (!mega_proc_dir_entry) {
4694                 printk(KERN_WARNING
4695                                 "megaraid: failed to create megaraid root\n");
4696         }
4697 #endif
4698         error = pci_register_driver(&megaraid_pci_driver);
4699         if (error) {
4700 #ifdef CONFIG_PROC_FS
4701                 remove_proc_entry("megaraid", NULL);
4702 #endif
4703                 return error;
4704         }
4705
4706         /*
4707          * Register the driver as a character device, for applications
4708          * to access it for ioctls.
4709          * First argument (major) to register_chrdev implies a dynamic
4710          * major number allocation.
4711          */
4712         major = register_chrdev(0, "megadev_legacy", &megadev_fops);
4713         if (!major) {
4714                 printk(KERN_WARNING
4715                                 "megaraid: failed to register char device\n");
4716         }
4717
4718         return 0;
4719 }
4720
4721 static void __exit megaraid_exit(void)
4722 {
4723         /*
4724          * Unregister the character device interface to the driver.
4725          */
4726         unregister_chrdev(major, "megadev_legacy");
4727
4728         pci_unregister_driver(&megaraid_pci_driver);
4729
4730 #ifdef CONFIG_PROC_FS
4731         remove_proc_entry("megaraid", NULL);
4732 #endif
4733 }
4734
4735 module_init(megaraid_init);
4736 module_exit(megaraid_exit);
4737
4738 /* vi: set ts=8 sw=8 tw=78: */